| 3 13 9 5 4 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 | /* SPDX-License-Identifier: GPL-2.0-only */ /* * File: af_phonet.h * * Phonet sockets kernel definitions * * Copyright (C) 2008 Nokia Corporation. */ #ifndef AF_PHONET_H #define AF_PHONET_H #include <linux/phonet.h> #include <linux/skbuff.h> #include <net/sock.h> /* * The lower layers may not require more space, ever. Make sure it's * enough. */ #define MAX_PHONET_HEADER (8 + MAX_HEADER) /* * Every Phonet* socket has this structure first in its * protocol-specific structure under name c. */ struct pn_sock { struct sock sk; u16 sobject; u16 dobject; u8 resource; }; static inline struct pn_sock *pn_sk(struct sock *sk) { return (struct pn_sock *)sk; } extern const struct proto_ops phonet_dgram_ops; void pn_sock_init(void); struct sock *pn_find_sock_by_sa(struct net *net, const struct sockaddr_pn *sa); void pn_deliver_sock_broadcast(struct net *net, struct sk_buff *skb); void phonet_get_local_port_range(int *min, int *max); int pn_sock_hash(struct sock *sk); void pn_sock_unhash(struct sock *sk); int pn_sock_get_port(struct sock *sk, unsigned short sport); struct sock *pn_find_sock_by_res(struct net *net, u8 res); int pn_sock_bind_res(struct sock *sock, u8 res); int pn_sock_unbind_res(struct sock *sk, u8 res); void pn_sock_unbind_all_res(struct sock *sk); int pn_skb_send(struct sock *sk, struct sk_buff *skb, const struct sockaddr_pn *target); static inline struct phonethdr *pn_hdr(struct sk_buff *skb) { return (struct phonethdr *)skb_network_header(skb); } static inline struct phonetmsg *pn_msg(struct sk_buff *skb) { return (struct phonetmsg *)skb_transport_header(skb); } /* * Get the other party's sockaddr from received skb. The skb begins * with a Phonet header. */ static inline void pn_skb_get_src_sockaddr(struct sk_buff *skb, struct sockaddr_pn *sa) { struct phonethdr *ph = pn_hdr(skb); u16 obj = pn_object(ph->pn_sdev, ph->pn_sobj); sa->spn_family = AF_PHONET; pn_sockaddr_set_object(sa, obj); pn_sockaddr_set_resource(sa, ph->pn_res); memset(sa->spn_zero, 0, sizeof(sa->spn_zero)); } static inline void pn_skb_get_dst_sockaddr(struct sk_buff *skb, struct sockaddr_pn *sa) { struct phonethdr *ph = pn_hdr(skb); u16 obj = pn_object(ph->pn_rdev, ph->pn_robj); sa->spn_family = AF_PHONET; pn_sockaddr_set_object(sa, obj); pn_sockaddr_set_resource(sa, ph->pn_res); memset(sa->spn_zero, 0, sizeof(sa->spn_zero)); } /* Protocols in Phonet protocol family. */ struct phonet_protocol { const struct proto_ops *ops; struct proto *prot; int sock_type; }; int phonet_proto_register(unsigned int protocol, const struct phonet_protocol *pp); void phonet_proto_unregister(unsigned int protocol, const struct phonet_protocol *pp); int phonet_sysctl_init(void); void phonet_sysctl_exit(void); int isi_register(void); void isi_unregister(void); static inline bool sk_is_phonet(struct sock *sk) { return sk->sk_family == PF_PHONET; } static inline int phonet_sk_ioctl(struct sock *sk, unsigned int cmd, void __user *arg) { int karg; switch (cmd) { case SIOCPNADDRESOURCE: case SIOCPNDELRESOURCE: if (get_user(karg, (int __user *)arg)) return -EFAULT; return sk->sk_prot->ioctl(sk, cmd, &karg); } /* A positive return value means that the ioctl was not processed */ return 1; } #endif |
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 | /* SPDX-License-Identifier: GPL-2.0 */ #ifndef __LINUX_DEBUG_LOCKING_H #define __LINUX_DEBUG_LOCKING_H #include <linux/atomic.h> #include <linux/cache.h> struct task_struct; extern int debug_locks __read_mostly; extern int debug_locks_silent __read_mostly; static __always_inline int __debug_locks_off(void) { return xchg(&debug_locks, 0); } /* * Generic 'turn off all lock debugging' function: */ extern int debug_locks_off(void); #define DEBUG_LOCKS_WARN_ON(c) \ ({ \ int __ret = 0; \ \ if (!oops_in_progress && unlikely(c)) { \ instrumentation_begin(); \ if (debug_locks_off() && !debug_locks_silent) \ WARN(1, "DEBUG_LOCKS_WARN_ON(%s)", #c); \ instrumentation_end(); \ __ret = 1; \ } \ __ret; \ }) #ifdef CONFIG_SMP # define SMP_DEBUG_LOCKS_WARN_ON(c) DEBUG_LOCKS_WARN_ON(c) #else # define SMP_DEBUG_LOCKS_WARN_ON(c) do { } while (0) #endif #ifdef CONFIG_DEBUG_LOCKING_API_SELFTESTS extern void locking_selftest(void); #else # define locking_selftest() do { } while (0) #endif #ifdef CONFIG_LOCKDEP extern void debug_show_all_locks(void); extern void debug_show_held_locks(struct task_struct *task); extern void debug_check_no_locks_freed(const void *from, unsigned long len); extern void debug_check_no_locks_held(void); #else static inline void debug_show_all_locks(void) { } static inline void debug_show_held_locks(struct task_struct *task) { } static inline void debug_check_no_locks_freed(const void *from, unsigned long len) { } static inline void debug_check_no_locks_held(void) { } #endif #endif |
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2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 | // SPDX-License-Identifier: GPL-2.0-or-later /* * Linux I2C core * * Copyright (C) 1995-99 Simon G. Vogl * With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> * Mux support by Rodolfo Giometti <giometti@enneenne.com> and * Michael Lawnick <michael.lawnick.ext@nsn.com> * * Copyright (C) 2013-2017 Wolfram Sang <wsa@kernel.org> */ #define pr_fmt(fmt) "i2c-core: " fmt #include <dt-bindings/i2c/i2c.h> #include <linux/acpi.h> #include <linux/clk/clk-conf.h> #include <linux/completion.h> #include <linux/debugfs.h> #include <linux/delay.h> #include <linux/err.h> #include <linux/errno.h> #include <linux/gpio/consumer.h> #include <linux/i2c.h> #include <linux/i2c-smbus.h> #include <linux/idr.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/jump_label.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/of_device.h> #include <linux/of.h> #include <linux/pinctrl/consumer.h> #include <linux/pinctrl/devinfo.h> #include <linux/pm_domain.h> #include <linux/pm_runtime.h> #include <linux/pm_wakeirq.h> #include <linux/property.h> #include <linux/rwsem.h> #include <linux/slab.h> #include <linux/string_choices.h> #include "i2c-core.h" #define CREATE_TRACE_POINTS #include <trace/events/i2c.h> #define I2C_ADDR_OFFSET_TEN_BIT 0xa000 #define I2C_ADDR_OFFSET_SLAVE 0x1000 #define I2C_ADDR_7BITS_MAX 0x77 #define I2C_ADDR_7BITS_COUNT (I2C_ADDR_7BITS_MAX + 1) #define I2C_ADDR_DEVICE_ID 0x7c /* * core_lock protects i2c_adapter_idr, and guarantees that device detection, * deletion of detected devices are serialized */ static DEFINE_MUTEX(core_lock); static DEFINE_IDR(i2c_adapter_idr); static int i2c_detect(struct i2c_adapter *adapter, struct i2c_driver *driver); static DEFINE_STATIC_KEY_FALSE(i2c_trace_msg_key); static bool is_registered; static struct dentry *i2c_debugfs_root; int i2c_transfer_trace_reg(void) { static_branch_inc(&i2c_trace_msg_key); return 0; } void i2c_transfer_trace_unreg(void) { static_branch_dec(&i2c_trace_msg_key); } const char *i2c_freq_mode_string(u32 bus_freq_hz) { switch (bus_freq_hz) { case I2C_MAX_STANDARD_MODE_FREQ: return "Standard Mode (100 kHz)"; case I2C_MAX_FAST_MODE_FREQ: return "Fast Mode (400 kHz)"; case I2C_MAX_FAST_MODE_PLUS_FREQ: return "Fast Mode Plus (1.0 MHz)"; case I2C_MAX_TURBO_MODE_FREQ: return "Turbo Mode (1.4 MHz)"; case I2C_MAX_HIGH_SPEED_MODE_FREQ: return "High Speed Mode (3.4 MHz)"; case I2C_MAX_ULTRA_FAST_MODE_FREQ: return "Ultra Fast Mode (5.0 MHz)"; default: return "Unknown Mode"; } } EXPORT_SYMBOL_GPL(i2c_freq_mode_string); const struct i2c_device_id *i2c_match_id(const struct i2c_device_id *id, const struct i2c_client *client) { if (!(id && client)) return NULL; while (id->name[0]) { if (strcmp(client->name, id->name) == 0) return id; id++; } return NULL; } EXPORT_SYMBOL_GPL(i2c_match_id); const void *i2c_get_match_data(const struct i2c_client *client) { struct i2c_driver *driver = to_i2c_driver(client->dev.driver); const struct i2c_device_id *match; const void *data; data = device_get_match_data(&client->dev); if (!data) { match = i2c_match_id(driver->id_table, client); if (!match) return NULL; data = (const void *)match->driver_data; } return data; } EXPORT_SYMBOL(i2c_get_match_data); static int i2c_device_match(struct device *dev, const struct device_driver *drv) { struct i2c_client *client = i2c_verify_client(dev); const struct i2c_driver *driver; /* Attempt an OF style match */ if (i2c_of_match_device(drv->of_match_table, client)) return 1; /* Then ACPI style match */ if (acpi_driver_match_device(dev, drv)) return 1; driver = to_i2c_driver(drv); /* Finally an I2C match */ if (i2c_match_id(driver->id_table, client)) return 1; return 0; } static int i2c_device_uevent(const struct device *dev, struct kobj_uevent_env *env) { const struct i2c_client *client = to_i2c_client(dev); int rc; rc = of_device_uevent_modalias(dev, env); if (rc != -ENODEV) return rc; rc = acpi_device_uevent_modalias(dev, env); if (rc != -ENODEV) return rc; return add_uevent_var(env, "MODALIAS=%s%s", I2C_MODULE_PREFIX, client->name); } /* i2c bus recovery routines */ static int get_scl_gpio_value(struct i2c_adapter *adap) { return gpiod_get_value_cansleep(adap->bus_recovery_info->scl_gpiod); } static void set_scl_gpio_value(struct i2c_adapter *adap, int val) { gpiod_set_value_cansleep(adap->bus_recovery_info->scl_gpiod, val); } static int get_sda_gpio_value(struct i2c_adapter *adap) { return gpiod_get_value_cansleep(adap->bus_recovery_info->sda_gpiod); } static void set_sda_gpio_value(struct i2c_adapter *adap, int val) { gpiod_set_value_cansleep(adap->bus_recovery_info->sda_gpiod, val); } static int i2c_generic_bus_free(struct i2c_adapter *adap) { struct i2c_bus_recovery_info *bri = adap->bus_recovery_info; int ret = -EOPNOTSUPP; if (bri->get_bus_free) ret = bri->get_bus_free(adap); else if (bri->get_sda) ret = bri->get_sda(adap); if (ret < 0) return ret; return ret ? 0 : -EBUSY; } /* * We are generating clock pulses. ndelay() determines durating of clk pulses. * We will generate clock with rate 100 KHz and so duration of both clock levels * is: delay in ns = (10^6 / 100) / 2 */ #define RECOVERY_NDELAY 5000 #define RECOVERY_CLK_CNT 9 int i2c_generic_scl_recovery(struct i2c_adapter *adap) { struct i2c_bus_recovery_info *bri = adap->bus_recovery_info; int i = 0, scl = 1, ret = 0; if (bri->prepare_recovery) bri->prepare_recovery(adap); if (bri->pinctrl) pinctrl_select_state(bri->pinctrl, bri->pins_gpio); /* * If we can set SDA, we will always create a STOP to ensure additional * pulses will do no harm. This is achieved by letting SDA follow SCL * half a cycle later. Check the 'incomplete_write_byte' fault injector * for details. Note that we must honour tsu:sto, 4us, but lets use 5us * here for simplicity. */ bri->set_scl(adap, scl); ndelay(RECOVERY_NDELAY); if (bri->set_sda) bri->set_sda(adap, scl); ndelay(RECOVERY_NDELAY / 2); /* * By this time SCL is high, as we need to give 9 falling-rising edges */ while (i++ < RECOVERY_CLK_CNT * 2) { if (scl) { /* SCL shouldn't be low here */ if (!bri->get_scl(adap)) { dev_err(&adap->dev, "SCL is stuck low, exit recovery\n"); ret = -EBUSY; break; } } scl = !scl; bri->set_scl(adap, scl); /* Creating STOP again, see above */ if (scl) { /* Honour minimum tsu:sto */ ndelay(RECOVERY_NDELAY); } else { /* Honour minimum tf and thd:dat */ ndelay(RECOVERY_NDELAY / 2); } if (bri->set_sda) bri->set_sda(adap, scl); ndelay(RECOVERY_NDELAY / 2); if (scl) { ret = i2c_generic_bus_free(adap); if (ret == 0) break; } } /* If we can't check bus status, assume recovery worked */ if (ret == -EOPNOTSUPP) ret = 0; if (bri->unprepare_recovery) bri->unprepare_recovery(adap); if (bri->pinctrl) pinctrl_select_state(bri->pinctrl, bri->pins_default); return ret; } EXPORT_SYMBOL_GPL(i2c_generic_scl_recovery); int i2c_recover_bus(struct i2c_adapter *adap) { if (!adap->bus_recovery_info) return -EBUSY; dev_dbg(&adap->dev, "Trying i2c bus recovery\n"); return adap->bus_recovery_info->recover_bus(adap); } EXPORT_SYMBOL_GPL(i2c_recover_bus); static void i2c_gpio_init_pinctrl_recovery(struct i2c_adapter *adap) { struct i2c_bus_recovery_info *bri = adap->bus_recovery_info; struct device *dev = &adap->dev; struct pinctrl *p = bri->pinctrl ?: dev_pinctrl(dev->parent); bri->pinctrl = p; /* * we can't change states without pinctrl, so remove the states if * populated */ if (!p) { bri->pins_default = NULL; bri->pins_gpio = NULL; return; } if (!bri->pins_default) { bri->pins_default = pinctrl_lookup_state(p, PINCTRL_STATE_DEFAULT); if (IS_ERR(bri->pins_default)) { dev_dbg(dev, PINCTRL_STATE_DEFAULT " state not found for GPIO recovery\n"); bri->pins_default = NULL; } } if (!bri->pins_gpio) { bri->pins_gpio = pinctrl_lookup_state(p, "gpio"); if (IS_ERR(bri->pins_gpio)) bri->pins_gpio = pinctrl_lookup_state(p, "recovery"); if (IS_ERR(bri->pins_gpio)) { dev_dbg(dev, "no gpio or recovery state found for GPIO recovery\n"); bri->pins_gpio = NULL; } } /* for pinctrl state changes, we need all the information */ if (bri->pins_default && bri->pins_gpio) { dev_info(dev, "using pinctrl states for GPIO recovery"); } else { bri->pinctrl = NULL; bri->pins_default = NULL; bri->pins_gpio = NULL; } } static int i2c_gpio_init_generic_recovery(struct i2c_adapter *adap) { struct i2c_bus_recovery_info *bri = adap->bus_recovery_info; struct device *dev = &adap->dev; struct gpio_desc *gpiod; int ret = 0; /* * don't touch the recovery information if the driver is not using * generic SCL recovery */ if (bri->recover_bus && bri->recover_bus != i2c_generic_scl_recovery) return 0; /* * pins might be taken as GPIO, so we should inform pinctrl about * this and move the state to GPIO */ if (bri->pinctrl) pinctrl_select_state(bri->pinctrl, bri->pins_gpio); /* * if there is incomplete or no recovery information, see if generic * GPIO recovery is available */ if (!bri->scl_gpiod) { gpiod = devm_gpiod_get(dev, "scl", GPIOD_OUT_HIGH_OPEN_DRAIN); if (PTR_ERR(gpiod) == -EPROBE_DEFER) { ret = -EPROBE_DEFER; goto cleanup_pinctrl_state; } if (!IS_ERR(gpiod)) { bri->scl_gpiod = gpiod; bri->recover_bus = i2c_generic_scl_recovery; dev_info(dev, "using generic GPIOs for recovery\n"); } } /* SDA GPIOD line is optional, so we care about DEFER only */ if (!bri->sda_gpiod) { /* * We have SCL. Pull SCL low and wait a bit so that SDA glitches * have no effect. */ gpiod_direction_output(bri->scl_gpiod, 0); udelay(10); gpiod = devm_gpiod_get(dev, "sda", GPIOD_IN); /* Wait a bit in case of a SDA glitch, and then release SCL. */ udelay(10); gpiod_direction_output(bri->scl_gpiod, 1); if (PTR_ERR(gpiod) == -EPROBE_DEFER) { ret = -EPROBE_DEFER; goto cleanup_pinctrl_state; } if (!IS_ERR(gpiod)) bri->sda_gpiod = gpiod; } cleanup_pinctrl_state: /* change the state of the pins back to their default state */ if (bri->pinctrl) pinctrl_select_state(bri->pinctrl, bri->pins_default); return ret; } static int i2c_gpio_init_recovery(struct i2c_adapter *adap) { i2c_gpio_init_pinctrl_recovery(adap); return i2c_gpio_init_generic_recovery(adap); } static int i2c_init_recovery(struct i2c_adapter *adap) { struct i2c_bus_recovery_info *bri = adap->bus_recovery_info; bool is_error_level = true; char *err_str; if (!bri) return 0; if (i2c_gpio_init_recovery(adap) == -EPROBE_DEFER) return -EPROBE_DEFER; if (!bri->recover_bus) { err_str = "no suitable method provided"; is_error_level = false; goto err; } if (bri->scl_gpiod && bri->recover_bus == i2c_generic_scl_recovery) { bri->get_scl = get_scl_gpio_value; bri->set_scl = set_scl_gpio_value; if (bri->sda_gpiod) { bri->get_sda = get_sda_gpio_value; /* FIXME: add proper flag instead of '0' once available */ if (gpiod_get_direction(bri->sda_gpiod) == 0) bri->set_sda = set_sda_gpio_value; } } else if (bri->recover_bus == i2c_generic_scl_recovery) { /* Generic SCL recovery */ if (!bri->set_scl || !bri->get_scl) { err_str = "no {get|set}_scl() found"; goto err; } if (!bri->set_sda && !bri->get_sda) { err_str = "either get_sda() or set_sda() needed"; goto err; } } return 0; err: if (is_error_level) dev_err(&adap->dev, "Not using recovery: %s\n", err_str); else dev_dbg(&adap->dev, "Not using recovery: %s\n", err_str); adap->bus_recovery_info = NULL; return -EINVAL; } static int i2c_smbus_host_notify_to_irq(const struct i2c_client *client) { struct i2c_adapter *adap = client->adapter; unsigned int irq; if (!adap->host_notify_domain) return -ENXIO; if (client->flags & I2C_CLIENT_TEN) return -EINVAL; irq = irq_create_mapping(adap->host_notify_domain, client->addr); return irq > 0 ? irq : -ENXIO; } static int i2c_device_probe(struct device *dev) { struct fwnode_handle *fwnode = dev_fwnode(dev); struct i2c_client *client = i2c_verify_client(dev); struct i2c_driver *driver; bool do_power_on; int status; if (!client) return 0; client->irq = client->init_irq; if (!client->irq) { int irq = -ENOENT; if (client->flags & I2C_CLIENT_HOST_NOTIFY) { dev_dbg(dev, "Using Host Notify IRQ\n"); /* Keep adapter active when Host Notify is required */ pm_runtime_get_sync(&client->adapter->dev); irq = i2c_smbus_host_notify_to_irq(client); } else if (is_of_node(fwnode)) { irq = fwnode_irq_get_byname(fwnode, "irq"); if (irq == -EINVAL || irq == -ENODATA) irq = fwnode_irq_get(fwnode, 0); } else if (is_acpi_device_node(fwnode)) { bool wake_capable; irq = i2c_acpi_get_irq(client, &wake_capable); if (irq > 0 && wake_capable) client->flags |= I2C_CLIENT_WAKE; } if (irq == -EPROBE_DEFER) { status = dev_err_probe(dev, irq, "can't get irq\n"); goto put_sync_adapter; } if (irq < 0) irq = 0; client->irq = irq; } driver = to_i2c_driver(dev->driver); /* * An I2C ID table is not mandatory, if and only if, a suitable OF * or ACPI ID table is supplied for the probing device. */ if (!driver->id_table && !acpi_driver_match_device(dev, dev->driver) && !i2c_of_match_device(dev->driver->of_match_table, client)) { status = -ENODEV; goto put_sync_adapter; } if (client->flags & I2C_CLIENT_WAKE) { int wakeirq; wakeirq = fwnode_irq_get_byname(fwnode, "wakeup"); if (wakeirq == -EPROBE_DEFER) { status = dev_err_probe(dev, wakeirq, "can't get wakeirq\n"); goto put_sync_adapter; } device_init_wakeup(&client->dev, true); if (wakeirq > 0 && wakeirq != client->irq) status = dev_pm_set_dedicated_wake_irq(dev, wakeirq); else if (client->irq > 0) status = dev_pm_set_wake_irq(dev, client->irq); else status = 0; if (status) dev_warn(&client->dev, "failed to set up wakeup irq\n"); } dev_dbg(dev, "probe\n"); status = of_clk_set_defaults(to_of_node(fwnode), false); if (status < 0) goto err_clear_wakeup_irq; do_power_on = !i2c_acpi_waive_d0_probe(dev); status = dev_pm_domain_attach(&client->dev, PD_FLAG_DETACH_POWER_OFF | (do_power_on ? PD_FLAG_ATTACH_POWER_ON : 0)); if (status) goto err_clear_wakeup_irq; client->devres_group_id = devres_open_group(&client->dev, NULL, GFP_KERNEL); if (!client->devres_group_id) { status = -ENOMEM; goto err_clear_wakeup_irq; } client->debugfs = debugfs_create_dir(dev_name(&client->dev), client->adapter->debugfs); if (driver->probe) status = driver->probe(client); else status = -EINVAL; /* * Note that we are not closing the devres group opened above so * even resources that were attached to the device after probe is * run are released when i2c_device_remove() is executed. This is * needed as some drivers would allocate additional resources, * for example when updating firmware. */ if (status) goto err_release_driver_resources; return 0; err_release_driver_resources: debugfs_remove_recursive(client->debugfs); devres_release_group(&client->dev, client->devres_group_id); err_clear_wakeup_irq: dev_pm_clear_wake_irq(&client->dev); device_init_wakeup(&client->dev, false); put_sync_adapter: if (client->flags & I2C_CLIENT_HOST_NOTIFY) pm_runtime_put_sync(&client->adapter->dev); return status; } static void i2c_device_remove(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct i2c_driver *driver; driver = to_i2c_driver(dev->driver); if (driver->remove) { dev_dbg(dev, "remove\n"); driver->remove(client); } debugfs_remove_recursive(client->debugfs); devres_release_group(&client->dev, client->devres_group_id); dev_pm_clear_wake_irq(&client->dev); device_init_wakeup(&client->dev, false); client->irq = 0; if (client->flags & I2C_CLIENT_HOST_NOTIFY) pm_runtime_put(&client->adapter->dev); } static void i2c_device_shutdown(struct device *dev) { struct i2c_client *client = i2c_verify_client(dev); struct i2c_driver *driver; if (!client || !dev->driver) return; driver = to_i2c_driver(dev->driver); if (driver->shutdown) driver->shutdown(client); else if (client->irq > 0) disable_irq(client->irq); } static void i2c_client_dev_release(struct device *dev) { kfree(to_i2c_client(dev)); } static ssize_t name_show(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "%s\n", dev->type == &i2c_client_type ? to_i2c_client(dev)->name : to_i2c_adapter(dev)->name); } static DEVICE_ATTR_RO(name); static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { struct i2c_client *client = to_i2c_client(dev); int len; len = of_device_modalias(dev, buf, PAGE_SIZE); if (len != -ENODEV) return len; len = acpi_device_modalias(dev, buf, PAGE_SIZE - 1); if (len != -ENODEV) return len; return sprintf(buf, "%s%s\n", I2C_MODULE_PREFIX, client->name); } static DEVICE_ATTR_RO(modalias); static struct attribute *i2c_dev_attrs[] = { &dev_attr_name.attr, /* modalias helps coldplug: modprobe $(cat .../modalias) */ &dev_attr_modalias.attr, NULL }; ATTRIBUTE_GROUPS(i2c_dev); const struct bus_type i2c_bus_type = { .name = "i2c", .match = i2c_device_match, .probe = i2c_device_probe, .remove = i2c_device_remove, .shutdown = i2c_device_shutdown, }; EXPORT_SYMBOL_GPL(i2c_bus_type); const struct device_type i2c_client_type = { .groups = i2c_dev_groups, .uevent = i2c_device_uevent, .release = i2c_client_dev_release, }; EXPORT_SYMBOL_GPL(i2c_client_type); /** * i2c_verify_client - return parameter as i2c_client, or NULL * @dev: device, probably from some driver model iterator * * When traversing the driver model tree, perhaps using driver model * iterators like @device_for_each_child(), you can't assume very much * about the nodes you find. Use this function to avoid oopses caused * by wrongly treating some non-I2C device as an i2c_client. */ struct i2c_client *i2c_verify_client(struct device *dev) { return (dev->type == &i2c_client_type) ? to_i2c_client(dev) : NULL; } EXPORT_SYMBOL(i2c_verify_client); /* Return a unique address which takes the flags of the client into account */ static unsigned short i2c_encode_flags_to_addr(struct i2c_client *client) { unsigned short addr = client->addr; /* For some client flags, add an arbitrary offset to avoid collisions */ if (client->flags & I2C_CLIENT_TEN) addr |= I2C_ADDR_OFFSET_TEN_BIT; if (client->flags & I2C_CLIENT_SLAVE) addr |= I2C_ADDR_OFFSET_SLAVE; return addr; } /* This is a permissive address validity check, I2C address map constraints * are purposely not enforced, except for the general call address. */ static int i2c_check_addr_validity(unsigned int addr, unsigned short flags) { if (flags & I2C_CLIENT_TEN) { /* 10-bit address, all values are valid */ if (addr > 0x3ff) return -EINVAL; } else { /* 7-bit address, reject the general call address */ if (addr == 0x00 || addr > 0x7f) return -EINVAL; } return 0; } /* And this is a strict address validity check, used when probing. If a * device uses a reserved address, then it shouldn't be probed. 7-bit * addressing is assumed, 10-bit address devices are rare and should be * explicitly enumerated. */ int i2c_check_7bit_addr_validity_strict(unsigned short addr) { /* * Reserved addresses per I2C specification: * 0x00 General call address / START byte * 0x01 CBUS address * 0x02 Reserved for different bus format * 0x03 Reserved for future purposes * 0x04-0x07 Hs-mode master code * 0x78-0x7b 10-bit slave addressing * 0x7c-0x7f Reserved for future purposes */ if (addr < 0x08 || addr > 0x77) return -EINVAL; return 0; } static int __i2c_check_addr_busy(struct device *dev, void *addrp) { struct i2c_client *client = i2c_verify_client(dev); int addr = *(int *)addrp; if (client && i2c_encode_flags_to_addr(client) == addr) return -EBUSY; return 0; } /* walk up mux tree */ static int i2c_check_mux_parents(struct i2c_adapter *adapter, int addr) { struct i2c_adapter *parent = i2c_parent_is_i2c_adapter(adapter); int result; result = device_for_each_child(&adapter->dev, &addr, __i2c_check_addr_busy); if (!result && parent) result = i2c_check_mux_parents(parent, addr); return result; } /* recurse down mux tree */ static int i2c_check_mux_children(struct device *dev, void *addrp) { int result; if (dev->type == &i2c_adapter_type) result = device_for_each_child(dev, addrp, i2c_check_mux_children); else result = __i2c_check_addr_busy(dev, addrp); return result; } static int i2c_check_addr_busy(struct i2c_adapter *adapter, int addr) { struct i2c_adapter *parent = i2c_parent_is_i2c_adapter(adapter); int result = 0; if (parent) result = i2c_check_mux_parents(parent, addr); if (!result) result = device_for_each_child(&adapter->dev, &addr, i2c_check_mux_children); return result; } /** * i2c_adapter_lock_bus - Get exclusive access to an I2C bus segment * @adapter: Target I2C bus segment * @flags: I2C_LOCK_ROOT_ADAPTER locks the root i2c adapter, I2C_LOCK_SEGMENT * locks only this branch in the adapter tree */ static void i2c_adapter_lock_bus(struct i2c_adapter *adapter, unsigned int flags) { rt_mutex_lock_nested(&adapter->bus_lock, i2c_adapter_depth(adapter)); } /** * i2c_adapter_trylock_bus - Try to get exclusive access to an I2C bus segment * @adapter: Target I2C bus segment * @flags: I2C_LOCK_ROOT_ADAPTER trylocks the root i2c adapter, I2C_LOCK_SEGMENT * trylocks only this branch in the adapter tree */ static int i2c_adapter_trylock_bus(struct i2c_adapter *adapter, unsigned int flags) { return rt_mutex_trylock(&adapter->bus_lock); } /** * i2c_adapter_unlock_bus - Release exclusive access to an I2C bus segment * @adapter: Target I2C bus segment * @flags: I2C_LOCK_ROOT_ADAPTER unlocks the root i2c adapter, I2C_LOCK_SEGMENT * unlocks only this branch in the adapter tree */ static void i2c_adapter_unlock_bus(struct i2c_adapter *adapter, unsigned int flags) { rt_mutex_unlock(&adapter->bus_lock); } static void i2c_dev_set_name(struct i2c_adapter *adap, struct i2c_client *client, struct i2c_board_info const *info) { struct acpi_device *adev = ACPI_COMPANION(&client->dev); if (info && info->dev_name) { dev_set_name(&client->dev, "i2c-%s", info->dev_name); return; } if (adev) { dev_set_name(&client->dev, "i2c-%s", acpi_dev_name(adev)); return; } dev_set_name(&client->dev, "%d-%04x", i2c_adapter_id(adap), i2c_encode_flags_to_addr(client)); } int i2c_dev_irq_from_resources(const struct resource *resources, unsigned int num_resources) { struct irq_data *irqd; int i; for (i = 0; i < num_resources; i++) { const struct resource *r = &resources[i]; if (resource_type(r) != IORESOURCE_IRQ) continue; if (r->flags & IORESOURCE_BITS) { irqd = irq_get_irq_data(r->start); if (!irqd) break; irqd_set_trigger_type(irqd, r->flags & IORESOURCE_BITS); } return r->start; } return 0; } /* * Serialize device instantiation in case it can be instantiated explicitly * and by auto-detection */ static int i2c_lock_addr(struct i2c_adapter *adap, unsigned short addr, unsigned short flags) { if (!(flags & I2C_CLIENT_TEN) && test_and_set_bit(addr, adap->addrs_in_instantiation)) return -EBUSY; return 0; } static void i2c_unlock_addr(struct i2c_adapter *adap, unsigned short addr, unsigned short flags) { if (!(flags & I2C_CLIENT_TEN)) clear_bit(addr, adap->addrs_in_instantiation); } /** * i2c_new_client_device - instantiate an i2c device * @adap: the adapter managing the device * @info: describes one I2C device; bus_num is ignored * Context: can sleep * * Create an i2c device. Binding is handled through driver model * probe()/remove() methods. A driver may be bound to this device when we * return from this function, or any later moment (e.g. maybe hotplugging will * load the driver module). This call is not appropriate for use by mainboard * initialization logic, which usually runs during an arch_initcall() long * before any i2c_adapter could exist. * * This returns the new i2c client, which may be saved for later use with * i2c_unregister_device(); or an ERR_PTR to describe the error. */ struct i2c_client * i2c_new_client_device(struct i2c_adapter *adap, struct i2c_board_info const *info) { struct fwnode_handle *fwnode = info->fwnode; struct i2c_client *client; bool need_put = false; int status; client = kzalloc(sizeof *client, GFP_KERNEL); if (!client) return ERR_PTR(-ENOMEM); client->adapter = adap; client->dev.platform_data = info->platform_data; client->flags = info->flags; client->addr = info->addr; client->init_irq = info->irq; if (!client->init_irq) client->init_irq = i2c_dev_irq_from_resources(info->resources, info->num_resources); strscpy(client->name, info->type, sizeof(client->name)); status = i2c_check_addr_validity(client->addr, client->flags); if (status) { dev_err(&adap->dev, "Invalid %d-bit I2C address 0x%02hx\n", client->flags & I2C_CLIENT_TEN ? 10 : 7, client->addr); goto out_err_silent; } status = i2c_lock_addr(adap, client->addr, client->flags); if (status) goto out_err_silent; /* Check for address business */ status = i2c_check_addr_busy(adap, i2c_encode_flags_to_addr(client)); if (status) goto out_err; client->dev.parent = &client->adapter->dev; client->dev.bus = &i2c_bus_type; client->dev.type = &i2c_client_type; device_enable_async_suspend(&client->dev); device_set_node(&client->dev, fwnode_handle_get(fwnode)); if (info->swnode) { status = device_add_software_node(&client->dev, info->swnode); if (status) { dev_err(&adap->dev, "Failed to add software node to client %s: %d\n", client->name, status); goto out_err_put_fwnode; } } i2c_dev_set_name(adap, client, info); status = device_register(&client->dev); if (status) goto out_remove_swnode; dev_dbg(&adap->dev, "client [%s] registered with bus id %s\n", client->name, dev_name(&client->dev)); i2c_unlock_addr(adap, client->addr, client->flags); return client; out_remove_swnode: device_remove_software_node(&client->dev); need_put = true; out_err_put_fwnode: fwnode_handle_put(fwnode); out_err: dev_err(&adap->dev, "Failed to register i2c client %s at 0x%02x (%d)\n", client->name, client->addr, status); i2c_unlock_addr(adap, client->addr, client->flags); out_err_silent: if (need_put) put_device(&client->dev); else kfree(client); return ERR_PTR(status); } EXPORT_SYMBOL_GPL(i2c_new_client_device); /** * i2c_unregister_device - reverse effect of i2c_new_*_device() * @client: value returned from i2c_new_*_device() * Context: can sleep */ void i2c_unregister_device(struct i2c_client *client) { struct fwnode_handle *fwnode; if (IS_ERR_OR_NULL(client)) return; fwnode = dev_fwnode(&client->dev); if (is_of_node(fwnode)) of_node_clear_flag(to_of_node(fwnode), OF_POPULATED); else if (is_acpi_device_node(fwnode)) acpi_device_clear_enumerated(to_acpi_device_node(fwnode)); /* * If the primary fwnode is a software node it is free-ed by * device_remove_software_node() below, avoid double-free. */ if (!is_software_node(fwnode)) fwnode_handle_put(fwnode); device_remove_software_node(&client->dev); device_unregister(&client->dev); } EXPORT_SYMBOL_GPL(i2c_unregister_device); /** * i2c_find_device_by_fwnode() - find an i2c_client for the fwnode * @fwnode: &struct fwnode_handle corresponding to the &struct i2c_client * * Look up and return the &struct i2c_client corresponding to the @fwnode. * If no client can be found, or @fwnode is NULL, this returns NULL. * * The user must call put_device(&client->dev) once done with the i2c client. */ struct i2c_client *i2c_find_device_by_fwnode(struct fwnode_handle *fwnode) { struct i2c_client *client; struct device *dev; if (!fwnode) return NULL; dev = bus_find_device_by_fwnode(&i2c_bus_type, fwnode); if (!dev) return NULL; client = i2c_verify_client(dev); if (!client) put_device(dev); return client; } EXPORT_SYMBOL(i2c_find_device_by_fwnode); static const struct i2c_device_id dummy_id[] = { { "dummy", }, { "smbus_host_notify", }, { } }; static int dummy_probe(struct i2c_client *client) { return 0; } static struct i2c_driver dummy_driver = { .driver.name = "dummy", .probe = dummy_probe, .id_table = dummy_id, }; /** * i2c_new_dummy_device - return a new i2c device bound to a dummy driver * @adapter: the adapter managing the device * @address: seven bit address to be used * Context: can sleep * * This returns an I2C client bound to the "dummy" driver, intended for use * with devices that consume multiple addresses. Examples of such chips * include various EEPROMS (like 24c04 and 24c08 models). * * These dummy devices have two main uses. First, most I2C and SMBus calls * except i2c_transfer() need a client handle; the dummy will be that handle. * And second, this prevents the specified address from being bound to a * different driver. * * This returns the new i2c client, which should be saved for later use with * i2c_unregister_device(); or an ERR_PTR to describe the error. */ struct i2c_client *i2c_new_dummy_device(struct i2c_adapter *adapter, u16 address) { struct i2c_board_info info = { I2C_BOARD_INFO("dummy", address), }; return i2c_new_client_device(adapter, &info); } EXPORT_SYMBOL_GPL(i2c_new_dummy_device); static void devm_i2c_release_dummy(void *client) { i2c_unregister_device(client); } /** * devm_i2c_new_dummy_device - return a new i2c device bound to a dummy driver * @dev: device the managed resource is bound to * @adapter: the adapter managing the device * @address: seven bit address to be used * Context: can sleep * * This is the device-managed version of @i2c_new_dummy_device. It returns the * new i2c client or an ERR_PTR in case of an error. */ struct i2c_client *devm_i2c_new_dummy_device(struct device *dev, struct i2c_adapter *adapter, u16 address) { struct i2c_client *client; int ret; client = i2c_new_dummy_device(adapter, address); if (IS_ERR(client)) return client; ret = devm_add_action_or_reset(dev, devm_i2c_release_dummy, client); if (ret) return ERR_PTR(ret); return client; } EXPORT_SYMBOL_GPL(devm_i2c_new_dummy_device); /** * i2c_new_ancillary_device - Helper to get the instantiated secondary address * and create the associated device * @client: Handle to the primary client * @name: Handle to specify which secondary address to get * @default_addr: Used as a fallback if no secondary address was specified * Context: can sleep * * I2C clients can be composed of multiple I2C slaves bound together in a single * component. The I2C client driver then binds to the master I2C slave and needs * to create I2C dummy clients to communicate with all the other slaves. * * This function creates and returns an I2C dummy client whose I2C address is * retrieved from the platform firmware based on the given slave name. If no * address is specified by the firmware default_addr is used. * * On DT-based platforms the address is retrieved from the "reg" property entry * cell whose "reg-names" value matches the slave name. * * This returns the new i2c client, which should be saved for later use with * i2c_unregister_device(); or an ERR_PTR to describe the error. */ struct i2c_client *i2c_new_ancillary_device(struct i2c_client *client, const char *name, u16 default_addr) { struct device_node *np = client->dev.of_node; u32 addr = default_addr; int i; i = of_property_match_string(np, "reg-names", name); if (i >= 0) of_property_read_u32_index(np, "reg", i, &addr); dev_dbg(&client->adapter->dev, "Address for %s : 0x%x\n", name, addr); return i2c_new_dummy_device(client->adapter, addr); } EXPORT_SYMBOL_GPL(i2c_new_ancillary_device); /* ------------------------------------------------------------------------- */ /* I2C bus adapters -- one roots each I2C or SMBUS segment */ static void i2c_adapter_dev_release(struct device *dev) { struct i2c_adapter *adap = to_i2c_adapter(dev); complete(&adap->dev_released); } unsigned int i2c_adapter_depth(struct i2c_adapter *adapter) { unsigned int depth = 0; struct device *parent; for (parent = adapter->dev.parent; parent; parent = parent->parent) if (parent->type == &i2c_adapter_type) depth++; WARN_ONCE(depth >= MAX_LOCKDEP_SUBCLASSES, "adapter depth exceeds lockdep subclass limit\n"); return depth; } EXPORT_SYMBOL_GPL(i2c_adapter_depth); /* * Let users instantiate I2C devices through sysfs. This can be used when * platform initialization code doesn't contain the proper data for * whatever reason. Also useful for drivers that do device detection and * detection fails, either because the device uses an unexpected address, * or this is a compatible device with different ID register values. * * Parameter checking may look overzealous, but we really don't want * the user to provide incorrect parameters. */ static ssize_t new_device_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct i2c_adapter *adap = to_i2c_adapter(dev); struct i2c_board_info info; struct i2c_client *client; char *blank, end; int res; memset(&info, 0, sizeof(struct i2c_board_info)); blank = strchr(buf, ' '); if (!blank) { dev_err(dev, "%s: Missing parameters\n", "new_device"); return -EINVAL; } if (blank - buf > I2C_NAME_SIZE - 1) { dev_err(dev, "%s: Invalid device name\n", "new_device"); return -EINVAL; } memcpy(info.type, buf, blank - buf); /* Parse remaining parameters, reject extra parameters */ res = sscanf(++blank, "%hi%c", &info.addr, &end); if (res < 1) { dev_err(dev, "%s: Can't parse I2C address\n", "new_device"); return -EINVAL; } if (res > 1 && end != '\n') { dev_err(dev, "%s: Extra parameters\n", "new_device"); return -EINVAL; } if ((info.addr & I2C_ADDR_OFFSET_TEN_BIT) == I2C_ADDR_OFFSET_TEN_BIT) { info.addr &= ~I2C_ADDR_OFFSET_TEN_BIT; info.flags |= I2C_CLIENT_TEN; } if (info.addr & I2C_ADDR_OFFSET_SLAVE) { info.addr &= ~I2C_ADDR_OFFSET_SLAVE; info.flags |= I2C_CLIENT_SLAVE; } client = i2c_new_client_device(adap, &info); if (IS_ERR(client)) return PTR_ERR(client); /* Keep track of the added device */ mutex_lock(&adap->userspace_clients_lock); list_add_tail(&client->detected, &adap->userspace_clients); mutex_unlock(&adap->userspace_clients_lock); dev_info(dev, "%s: Instantiated device %s at 0x%02hx\n", "new_device", info.type, info.addr); return count; } static DEVICE_ATTR_WO(new_device); /* * And of course let the users delete the devices they instantiated, if * they got it wrong. This interface can only be used to delete devices * instantiated by i2c_sysfs_new_device above. This guarantees that we * don't delete devices to which some kernel code still has references. * * Parameter checking may look overzealous, but we really don't want * the user to delete the wrong device. */ static ssize_t delete_device_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct i2c_adapter *adap = to_i2c_adapter(dev); struct i2c_client *client, *next; unsigned short addr; char end; int res; /* Parse parameters, reject extra parameters */ res = sscanf(buf, "%hi%c", &addr, &end); if (res < 1) { dev_err(dev, "%s: Can't parse I2C address\n", "delete_device"); return -EINVAL; } if (res > 1 && end != '\n') { dev_err(dev, "%s: Extra parameters\n", "delete_device"); return -EINVAL; } /* Make sure the device was added through sysfs */ res = -ENOENT; mutex_lock_nested(&adap->userspace_clients_lock, i2c_adapter_depth(adap)); list_for_each_entry_safe(client, next, &adap->userspace_clients, detected) { if (i2c_encode_flags_to_addr(client) == addr) { dev_info(dev, "%s: Deleting device %s at 0x%02hx\n", "delete_device", client->name, client->addr); list_del(&client->detected); i2c_unregister_device(client); res = count; break; } } mutex_unlock(&adap->userspace_clients_lock); if (res < 0) dev_err(dev, "%s: Can't find device in list\n", "delete_device"); return res; } static DEVICE_ATTR_IGNORE_LOCKDEP(delete_device, S_IWUSR, NULL, delete_device_store); static struct attribute *i2c_adapter_attrs[] = { &dev_attr_name.attr, &dev_attr_new_device.attr, &dev_attr_delete_device.attr, NULL }; ATTRIBUTE_GROUPS(i2c_adapter); const struct device_type i2c_adapter_type = { .groups = i2c_adapter_groups, .release = i2c_adapter_dev_release, }; EXPORT_SYMBOL_GPL(i2c_adapter_type); /** * i2c_verify_adapter - return parameter as i2c_adapter or NULL * @dev: device, probably from some driver model iterator * * When traversing the driver model tree, perhaps using driver model * iterators like @device_for_each_child(), you can't assume very much * about the nodes you find. Use this function to avoid oopses caused * by wrongly treating some non-I2C device as an i2c_adapter. */ struct i2c_adapter *i2c_verify_adapter(struct device *dev) { return (dev->type == &i2c_adapter_type) ? to_i2c_adapter(dev) : NULL; } EXPORT_SYMBOL(i2c_verify_adapter); static void i2c_scan_static_board_info(struct i2c_adapter *adapter) { struct i2c_devinfo *devinfo; down_read(&__i2c_board_lock); list_for_each_entry(devinfo, &__i2c_board_list, list) { if (devinfo->busnum == adapter->nr && IS_ERR(i2c_new_client_device(adapter, &devinfo->board_info))) dev_err(&adapter->dev, "Can't create device at 0x%02x\n", devinfo->board_info.addr); } up_read(&__i2c_board_lock); } static int i2c_do_add_adapter(struct i2c_driver *driver, struct i2c_adapter *adap) { /* Detect supported devices on that bus, and instantiate them */ i2c_detect(adap, driver); return 0; } static int __process_new_adapter(struct device_driver *d, void *data) { return i2c_do_add_adapter(to_i2c_driver(d), data); } static const struct i2c_lock_operations i2c_adapter_lock_ops = { .lock_bus = i2c_adapter_lock_bus, .trylock_bus = i2c_adapter_trylock_bus, .unlock_bus = i2c_adapter_unlock_bus, }; static void i2c_host_notify_irq_teardown(struct i2c_adapter *adap) { struct irq_domain *domain = adap->host_notify_domain; irq_hw_number_t hwirq; if (!domain) return; for (hwirq = 0 ; hwirq < I2C_ADDR_7BITS_COUNT ; hwirq++) irq_dispose_mapping(irq_find_mapping(domain, hwirq)); irq_domain_remove(domain); adap->host_notify_domain = NULL; } static int i2c_host_notify_irq_map(struct irq_domain *h, unsigned int virq, irq_hw_number_t hw_irq_num) { irq_set_chip_and_handler(virq, &dummy_irq_chip, handle_simple_irq); return 0; } static const struct irq_domain_ops i2c_host_notify_irq_ops = { .map = i2c_host_notify_irq_map, }; static int i2c_setup_host_notify_irq_domain(struct i2c_adapter *adap) { struct irq_domain *domain; if (!i2c_check_functionality(adap, I2C_FUNC_SMBUS_HOST_NOTIFY)) return 0; domain = irq_domain_create_linear(adap->dev.parent->fwnode, I2C_ADDR_7BITS_COUNT, &i2c_host_notify_irq_ops, adap); if (!domain) return -ENOMEM; adap->host_notify_domain = domain; return 0; } /** * i2c_handle_smbus_host_notify - Forward a Host Notify event to the correct * I2C client. * @adap: the adapter * @addr: the I2C address of the notifying device * Context: can't sleep * * Helper function to be called from an I2C bus driver's interrupt * handler. It will schedule the Host Notify IRQ. */ int i2c_handle_smbus_host_notify(struct i2c_adapter *adap, unsigned short addr) { int irq; if (!adap) return -EINVAL; dev_dbg(&adap->dev, "Detected HostNotify from address 0x%02x", addr); irq = irq_find_mapping(adap->host_notify_domain, addr); if (irq <= 0) return -ENXIO; generic_handle_irq_safe(irq); return 0; } EXPORT_SYMBOL_GPL(i2c_handle_smbus_host_notify); static int i2c_register_adapter(struct i2c_adapter *adap) { int res = -EINVAL; /* Can't register until after driver model init */ if (WARN_ON(!is_registered)) { res = -EAGAIN; goto out_list; } /* Sanity checks */ if (WARN(!adap->name[0], "i2c adapter has no name")) goto out_list; if (!adap->algo) { pr_err("adapter '%s': no algo supplied!\n", adap->name); goto out_list; } if (!adap->lock_ops) adap->lock_ops = &i2c_adapter_lock_ops; adap->locked_flags = 0; rt_mutex_init(&adap->bus_lock); rt_mutex_init(&adap->mux_lock); mutex_init(&adap->userspace_clients_lock); INIT_LIST_HEAD(&adap->userspace_clients); /* Set default timeout to 1 second if not already set */ if (adap->timeout == 0) adap->timeout = HZ; /* register soft irqs for Host Notify */ res = i2c_setup_host_notify_irq_domain(adap); if (res) { pr_err("adapter '%s': can't create Host Notify IRQs (%d)\n", adap->name, res); goto out_list; } dev_set_name(&adap->dev, "i2c-%d", adap->nr); adap->dev.bus = &i2c_bus_type; adap->dev.type = &i2c_adapter_type; device_initialize(&adap->dev); /* * This adapter can be used as a parent immediately after device_add(), * setup runtime-pm (especially ignore-children) before hand. */ device_enable_async_suspend(&adap->dev); pm_runtime_no_callbacks(&adap->dev); pm_suspend_ignore_children(&adap->dev, true); pm_runtime_enable(&adap->dev); res = device_add(&adap->dev); if (res) { pr_err("adapter '%s': can't register device (%d)\n", adap->name, res); put_device(&adap->dev); goto out_list; } adap->debugfs = debugfs_create_dir(dev_name(&adap->dev), i2c_debugfs_root); res = i2c_setup_smbus_alert(adap); if (res) goto out_reg; res = i2c_init_recovery(adap); if (res == -EPROBE_DEFER) goto out_reg; dev_dbg(&adap->dev, "adapter [%s] registered\n", adap->name); /* create pre-declared device nodes */ of_i2c_register_devices(adap); i2c_acpi_install_space_handler(adap); i2c_acpi_register_devices(adap); if (adap->nr < __i2c_first_dynamic_bus_num) i2c_scan_static_board_info(adap); /* Notify drivers */ mutex_lock(&core_lock); bus_for_each_drv(&i2c_bus_type, NULL, adap, __process_new_adapter); mutex_unlock(&core_lock); return 0; out_reg: debugfs_remove_recursive(adap->debugfs); init_completion(&adap->dev_released); device_unregister(&adap->dev); wait_for_completion(&adap->dev_released); out_list: mutex_lock(&core_lock); idr_remove(&i2c_adapter_idr, adap->nr); mutex_unlock(&core_lock); return res; } /** * __i2c_add_numbered_adapter - i2c_add_numbered_adapter where nr is never -1 * @adap: the adapter to register (with adap->nr initialized) * Context: can sleep * * See i2c_add_numbered_adapter() for details. */ static int __i2c_add_numbered_adapter(struct i2c_adapter *adap) { int id; mutex_lock(&core_lock); id = idr_alloc(&i2c_adapter_idr, adap, adap->nr, adap->nr + 1, GFP_KERNEL); mutex_unlock(&core_lock); if (WARN(id < 0, "couldn't get idr")) return id == -ENOSPC ? -EBUSY : id; return i2c_register_adapter(adap); } /** * i2c_add_adapter - declare i2c adapter, use dynamic bus number * @adapter: the adapter to add * Context: can sleep * * This routine is used to declare an I2C adapter when its bus number * doesn't matter or when its bus number is specified by an dt alias. * Examples of bases when the bus number doesn't matter: I2C adapters * dynamically added by USB links or PCI plugin cards. * * When this returns zero, a new bus number was allocated and stored * in adap->nr, and the specified adapter became available for clients. * Otherwise, a negative errno value is returned. */ int i2c_add_adapter(struct i2c_adapter *adapter) { struct device *dev = &adapter->dev; int id; id = of_alias_get_id(dev->of_node, "i2c"); if (id >= 0) { adapter->nr = id; return __i2c_add_numbered_adapter(adapter); } mutex_lock(&core_lock); id = idr_alloc(&i2c_adapter_idr, adapter, __i2c_first_dynamic_bus_num, 0, GFP_KERNEL); mutex_unlock(&core_lock); if (WARN(id < 0, "couldn't get idr")) return id; adapter->nr = id; return i2c_register_adapter(adapter); } EXPORT_SYMBOL(i2c_add_adapter); /** * i2c_add_numbered_adapter - declare i2c adapter, use static bus number * @adap: the adapter to register (with adap->nr initialized) * Context: can sleep * * This routine is used to declare an I2C adapter when its bus number * matters. For example, use it for I2C adapters from system-on-chip CPUs, * or otherwise built in to the system's mainboard, and where i2c_board_info * is used to properly configure I2C devices. * * If the requested bus number is set to -1, then this function will behave * identically to i2c_add_adapter, and will dynamically assign a bus number. * * If no devices have pre-been declared for this bus, then be sure to * register the adapter before any dynamically allocated ones. Otherwise * the required bus ID may not be available. * * When this returns zero, the specified adapter became available for * clients using the bus number provided in adap->nr. Also, the table * of I2C devices pre-declared using i2c_register_board_info() is scanned, * and the appropriate driver model device nodes are created. Otherwise, a * negative errno value is returned. */ int i2c_add_numbered_adapter(struct i2c_adapter *adap) { if (adap->nr == -1) /* -1 means dynamically assign bus id */ return i2c_add_adapter(adap); return __i2c_add_numbered_adapter(adap); } EXPORT_SYMBOL_GPL(i2c_add_numbered_adapter); static void i2c_do_del_adapter(struct i2c_driver *driver, struct i2c_adapter *adapter) { struct i2c_client *client, *_n; /* Remove the devices we created ourselves as the result of hardware * probing (using a driver's detect method) */ list_for_each_entry_safe(client, _n, &driver->clients, detected) { if (client->adapter == adapter) { dev_dbg(&adapter->dev, "Removing %s at 0x%x\n", client->name, client->addr); list_del(&client->detected); i2c_unregister_device(client); } } } static int __unregister_client(struct device *dev, void *dummy) { struct i2c_client *client = i2c_verify_client(dev); if (client && strcmp(client->name, "dummy")) i2c_unregister_device(client); return 0; } static int __unregister_dummy(struct device *dev, void *dummy) { struct i2c_client *client = i2c_verify_client(dev); i2c_unregister_device(client); return 0; } static int __process_removed_adapter(struct device_driver *d, void *data) { i2c_do_del_adapter(to_i2c_driver(d), data); return 0; } /** * i2c_del_adapter - unregister I2C adapter * @adap: the adapter being unregistered * Context: can sleep * * This unregisters an I2C adapter which was previously registered * by @i2c_add_adapter or @i2c_add_numbered_adapter. */ void i2c_del_adapter(struct i2c_adapter *adap) { struct i2c_adapter *found; struct i2c_client *client, *next; /* First make sure that this adapter was ever added */ mutex_lock(&core_lock); found = idr_find(&i2c_adapter_idr, adap->nr); mutex_unlock(&core_lock); if (found != adap) { pr_debug("attempting to delete unregistered adapter [%s]\n", adap->name); return; } i2c_acpi_remove_space_handler(adap); /* Tell drivers about this removal */ mutex_lock(&core_lock); bus_for_each_drv(&i2c_bus_type, NULL, adap, __process_removed_adapter); mutex_unlock(&core_lock); /* Remove devices instantiated from sysfs */ mutex_lock_nested(&adap->userspace_clients_lock, i2c_adapter_depth(adap)); list_for_each_entry_safe(client, next, &adap->userspace_clients, detected) { dev_dbg(&adap->dev, "Removing %s at 0x%x\n", client->name, client->addr); list_del(&client->detected); i2c_unregister_device(client); } mutex_unlock(&adap->userspace_clients_lock); /* Detach any active clients. This can't fail, thus we do not * check the returned value. This is a two-pass process, because * we can't remove the dummy devices during the first pass: they * could have been instantiated by real devices wishing to clean * them up properly, so we give them a chance to do that first. */ device_for_each_child(&adap->dev, NULL, __unregister_client); device_for_each_child(&adap->dev, NULL, __unregister_dummy); /* device name is gone after device_unregister */ dev_dbg(&adap->dev, "adapter [%s] unregistered\n", adap->name); pm_runtime_disable(&adap->dev); i2c_host_notify_irq_teardown(adap); debugfs_remove_recursive(adap->debugfs); /* wait until all references to the device are gone * * FIXME: This is old code and should ideally be replaced by an * alternative which results in decoupling the lifetime of the struct * device from the i2c_adapter, like spi or netdev do. Any solution * should be thoroughly tested with DEBUG_KOBJECT_RELEASE enabled! */ init_completion(&adap->dev_released); device_unregister(&adap->dev); wait_for_completion(&adap->dev_released); /* free bus id */ mutex_lock(&core_lock); idr_remove(&i2c_adapter_idr, adap->nr); mutex_unlock(&core_lock); /* Clear the device structure in case this adapter is ever going to be added again */ memset(&adap->dev, 0, sizeof(adap->dev)); } EXPORT_SYMBOL(i2c_del_adapter); static void devm_i2c_del_adapter(void *adapter) { i2c_del_adapter(adapter); } /** * devm_i2c_add_adapter - device-managed variant of i2c_add_adapter() * @dev: managing device for adding this I2C adapter * @adapter: the adapter to add * Context: can sleep * * Add adapter with dynamic bus number, same with i2c_add_adapter() * but the adapter will be auto deleted on driver detach. */ int devm_i2c_add_adapter(struct device *dev, struct i2c_adapter *adapter) { int ret; ret = i2c_add_adapter(adapter); if (ret) return ret; return devm_add_action_or_reset(dev, devm_i2c_del_adapter, adapter); } EXPORT_SYMBOL_GPL(devm_i2c_add_adapter); static int i2c_dev_or_parent_fwnode_match(struct device *dev, const void *data) { if (dev_fwnode(dev) == data) return 1; if (dev->parent && dev_fwnode(dev->parent) == data) return 1; return 0; } /** * i2c_find_adapter_by_fwnode() - find an i2c_adapter for the fwnode * @fwnode: &struct fwnode_handle corresponding to the &struct i2c_adapter * * Look up and return the &struct i2c_adapter corresponding to the @fwnode. * If no adapter can be found, or @fwnode is NULL, this returns NULL. * * The user must call put_device(&adapter->dev) once done with the i2c adapter. */ struct i2c_adapter *i2c_find_adapter_by_fwnode(struct fwnode_handle *fwnode) { struct i2c_adapter *adapter; struct device *dev; if (!fwnode) return NULL; dev = bus_find_device(&i2c_bus_type, NULL, fwnode, i2c_dev_or_parent_fwnode_match); if (!dev) return NULL; adapter = i2c_verify_adapter(dev); if (!adapter) put_device(dev); return adapter; } EXPORT_SYMBOL(i2c_find_adapter_by_fwnode); /** * i2c_get_adapter_by_fwnode() - find an i2c_adapter for the fwnode * @fwnode: &struct fwnode_handle corresponding to the &struct i2c_adapter * * Look up and return the &struct i2c_adapter corresponding to the @fwnode, * and increment the adapter module's use count. If no adapter can be found, * or @fwnode is NULL, this returns NULL. * * The user must call i2c_put_adapter(adapter) once done with the i2c adapter. * Note that this is different from i2c_find_adapter_by_node(). */ struct i2c_adapter *i2c_get_adapter_by_fwnode(struct fwnode_handle *fwnode) { struct i2c_adapter *adapter; adapter = i2c_find_adapter_by_fwnode(fwnode); if (!adapter) return NULL; if (!try_module_get(adapter->owner)) { put_device(&adapter->dev); adapter = NULL; } return adapter; } EXPORT_SYMBOL(i2c_get_adapter_by_fwnode); static void i2c_parse_timing(struct device *dev, char *prop_name, u32 *cur_val_p, u32 def_val, bool use_def) { int ret; ret = device_property_read_u32(dev, prop_name, cur_val_p); if (ret && use_def) *cur_val_p = def_val; dev_dbg(dev, "%s: %u\n", prop_name, *cur_val_p); } /** * i2c_parse_fw_timings - get I2C related timing parameters from firmware * @dev: The device to scan for I2C timing properties * @t: the i2c_timings struct to be filled with values * @use_defaults: bool to use sane defaults derived from the I2C specification * when properties are not found, otherwise don't update * * Scan the device for the generic I2C properties describing timing parameters * for the signal and fill the given struct with the results. If a property was * not found and use_defaults was true, then maximum timings are assumed which * are derived from the I2C specification. If use_defaults is not used, the * results will be as before, so drivers can apply their own defaults before * calling this helper. The latter is mainly intended for avoiding regressions * of existing drivers which want to switch to this function. New drivers * almost always should use the defaults. */ void i2c_parse_fw_timings(struct device *dev, struct i2c_timings *t, bool use_defaults) { bool u = use_defaults; u32 d; i2c_parse_timing(dev, "clock-frequency", &t->bus_freq_hz, I2C_MAX_STANDARD_MODE_FREQ, u); d = t->bus_freq_hz <= I2C_MAX_STANDARD_MODE_FREQ ? 1000 : t->bus_freq_hz <= I2C_MAX_FAST_MODE_FREQ ? 300 : 120; i2c_parse_timing(dev, "i2c-scl-rising-time-ns", &t->scl_rise_ns, d, u); d = t->bus_freq_hz <= I2C_MAX_FAST_MODE_FREQ ? 300 : 120; i2c_parse_timing(dev, "i2c-scl-falling-time-ns", &t->scl_fall_ns, d, u); i2c_parse_timing(dev, "i2c-scl-internal-delay-ns", &t->scl_int_delay_ns, 0, u); i2c_parse_timing(dev, "i2c-sda-falling-time-ns", &t->sda_fall_ns, t->scl_fall_ns, u); i2c_parse_timing(dev, "i2c-sda-hold-time-ns", &t->sda_hold_ns, 0, u); i2c_parse_timing(dev, "i2c-digital-filter-width-ns", &t->digital_filter_width_ns, 0, u); i2c_parse_timing(dev, "i2c-analog-filter-cutoff-frequency", &t->analog_filter_cutoff_freq_hz, 0, u); } EXPORT_SYMBOL_GPL(i2c_parse_fw_timings); /* ------------------------------------------------------------------------- */ int i2c_for_each_dev(void *data, int (*fn)(struct device *dev, void *data)) { int res; mutex_lock(&core_lock); res = bus_for_each_dev(&i2c_bus_type, NULL, data, fn); mutex_unlock(&core_lock); return res; } EXPORT_SYMBOL_GPL(i2c_for_each_dev); static int __process_new_driver(struct device *dev, void *data) { if (dev->type != &i2c_adapter_type) return 0; return i2c_do_add_adapter(data, to_i2c_adapter(dev)); } /* * An i2c_driver is used with one or more i2c_client (device) nodes to access * i2c slave chips, on a bus instance associated with some i2c_adapter. */ int i2c_register_driver(struct module *owner, struct i2c_driver *driver) { int res; /* Can't register until after driver model init */ if (WARN_ON(!is_registered)) return -EAGAIN; /* add the driver to the list of i2c drivers in the driver core */ driver->driver.owner = owner; driver->driver.bus = &i2c_bus_type; INIT_LIST_HEAD(&driver->clients); /* When registration returns, the driver core * will have called probe() for all matching-but-unbound devices. */ res = driver_register(&driver->driver); if (res) return res; pr_debug("driver [%s] registered\n", driver->driver.name); /* Walk the adapters that are already present */ i2c_for_each_dev(driver, __process_new_driver); return 0; } EXPORT_SYMBOL(i2c_register_driver); static int __process_removed_driver(struct device *dev, void *data) { if (dev->type == &i2c_adapter_type) i2c_do_del_adapter(data, to_i2c_adapter(dev)); return 0; } /** * i2c_del_driver - unregister I2C driver * @driver: the driver being unregistered * Context: can sleep */ void i2c_del_driver(struct i2c_driver *driver) { i2c_for_each_dev(driver, __process_removed_driver); driver_unregister(&driver->driver); pr_debug("driver [%s] unregistered\n", driver->driver.name); } EXPORT_SYMBOL(i2c_del_driver); /* ------------------------------------------------------------------------- */ struct i2c_cmd_arg { unsigned cmd; void *arg; }; static int i2c_cmd(struct device *dev, void *_arg) { struct i2c_client *client = i2c_verify_client(dev); struct i2c_cmd_arg *arg = _arg; struct i2c_driver *driver; if (!client || !client->dev.driver) return 0; driver = to_i2c_driver(client->dev.driver); if (driver->command) driver->command(client, arg->cmd, arg->arg); return 0; } void i2c_clients_command(struct i2c_adapter *adap, unsigned int cmd, void *arg) { struct i2c_cmd_arg cmd_arg; cmd_arg.cmd = cmd; cmd_arg.arg = arg; device_for_each_child(&adap->dev, &cmd_arg, i2c_cmd); } EXPORT_SYMBOL(i2c_clients_command); static int __init i2c_init(void) { int retval; retval = of_alias_get_highest_id("i2c"); down_write(&__i2c_board_lock); if (retval >= __i2c_first_dynamic_bus_num) __i2c_first_dynamic_bus_num = retval + 1; up_write(&__i2c_board_lock); retval = bus_register(&i2c_bus_type); if (retval) return retval; is_registered = true; i2c_debugfs_root = debugfs_create_dir("i2c", NULL); retval = i2c_add_driver(&dummy_driver); if (retval) goto class_err; if (IS_ENABLED(CONFIG_OF_DYNAMIC)) WARN_ON(of_reconfig_notifier_register(&i2c_of_notifier)); if (IS_ENABLED(CONFIG_ACPI)) WARN_ON(acpi_reconfig_notifier_register(&i2c_acpi_notifier)); return 0; class_err: is_registered = false; bus_unregister(&i2c_bus_type); return retval; } static void __exit i2c_exit(void) { if (IS_ENABLED(CONFIG_ACPI)) WARN_ON(acpi_reconfig_notifier_unregister(&i2c_acpi_notifier)); if (IS_ENABLED(CONFIG_OF_DYNAMIC)) WARN_ON(of_reconfig_notifier_unregister(&i2c_of_notifier)); i2c_del_driver(&dummy_driver); debugfs_remove_recursive(i2c_debugfs_root); bus_unregister(&i2c_bus_type); tracepoint_synchronize_unregister(); } /* We must initialize early, because some subsystems register i2c drivers * in subsys_initcall() code, but are linked (and initialized) before i2c. */ postcore_initcall(i2c_init); module_exit(i2c_exit); /* ---------------------------------------------------- * the functional interface to the i2c busses. * ---------------------------------------------------- */ /* Check if val is exceeding the quirk IFF quirk is non 0 */ #define i2c_quirk_exceeded(val, quirk) ((quirk) && ((val) > (quirk))) static int i2c_quirk_error(struct i2c_adapter *adap, struct i2c_msg *msg, char *err_msg) { dev_err_ratelimited(&adap->dev, "adapter quirk: %s (addr 0x%04x, size %u, %s)\n", err_msg, msg->addr, msg->len, str_read_write(msg->flags & I2C_M_RD)); return -EOPNOTSUPP; } static int i2c_check_for_quirks(struct i2c_adapter *adap, struct i2c_msg *msgs, int num) { const struct i2c_adapter_quirks *q = adap->quirks; int max_num = q->max_num_msgs, i; bool do_len_check = true; if (q->flags & I2C_AQ_COMB) { max_num = 2; /* special checks for combined messages */ if (num == 2) { if (q->flags & I2C_AQ_COMB_WRITE_FIRST && msgs[0].flags & I2C_M_RD) return i2c_quirk_error(adap, &msgs[0], "1st comb msg must be write"); if (q->flags & I2C_AQ_COMB_READ_SECOND && !(msgs[1].flags & I2C_M_RD)) return i2c_quirk_error(adap, &msgs[1], "2nd comb msg must be read"); if (q->flags & I2C_AQ_COMB_SAME_ADDR && msgs[0].addr != msgs[1].addr) return i2c_quirk_error(adap, &msgs[0], "comb msg only to same addr"); if (i2c_quirk_exceeded(msgs[0].len, q->max_comb_1st_msg_len)) return i2c_quirk_error(adap, &msgs[0], "msg too long"); if (i2c_quirk_exceeded(msgs[1].len, q->max_comb_2nd_msg_len)) return i2c_quirk_error(adap, &msgs[1], "msg too long"); do_len_check = false; } } if (i2c_quirk_exceeded(num, max_num)) return i2c_quirk_error(adap, &msgs[0], "too many messages"); for (i = 0; i < num; i++) { u16 len = msgs[i].len; if (msgs[i].flags & I2C_M_RD) { if (do_len_check && i2c_quirk_exceeded(len, q->max_read_len)) return i2c_quirk_error(adap, &msgs[i], "msg too long"); if (q->flags & I2C_AQ_NO_ZERO_LEN_READ && len == 0) return i2c_quirk_error(adap, &msgs[i], "no zero length"); } else { if (do_len_check && i2c_quirk_exceeded(len, q->max_write_len)) return i2c_quirk_error(adap, &msgs[i], "msg too long"); if (q->flags & I2C_AQ_NO_ZERO_LEN_WRITE && len == 0) return i2c_quirk_error(adap, &msgs[i], "no zero length"); } } return 0; } /** * __i2c_transfer - unlocked flavor of i2c_transfer * @adap: Handle to I2C bus * @msgs: One or more messages to execute before STOP is issued to * terminate the operation; each message begins with a START. * @num: Number of messages to be executed. * * Returns negative errno, else the number of messages executed. * * Adapter lock must be held when calling this function. No debug logging * takes place. */ int __i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num) { unsigned long orig_jiffies; int ret, try; if (!adap->algo->master_xfer) { dev_dbg(&adap->dev, "I2C level transfers not supported\n"); return -EOPNOTSUPP; } if (WARN_ON(!msgs || num < 1)) return -EINVAL; ret = __i2c_check_suspended(adap); if (ret) return ret; if (adap->quirks && i2c_check_for_quirks(adap, msgs, num)) return -EOPNOTSUPP; /* * i2c_trace_msg_key gets enabled when tracepoint i2c_transfer gets * enabled. This is an efficient way of keeping the for-loop from * being executed when not needed. */ if (static_branch_unlikely(&i2c_trace_msg_key)) { int i; for (i = 0; i < num; i++) if (msgs[i].flags & I2C_M_RD) trace_i2c_read(adap, &msgs[i], i); else trace_i2c_write(adap, &msgs[i], i); } /* Retry automatically on arbitration loss */ orig_jiffies = jiffies; for (ret = 0, try = 0; try <= adap->retries; try++) { if (i2c_in_atomic_xfer_mode() && adap->algo->master_xfer_atomic) ret = adap->algo->master_xfer_atomic(adap, msgs, num); else ret = adap->algo->master_xfer(adap, msgs, num); if (ret != -EAGAIN) break; if (time_after(jiffies, orig_jiffies + adap->timeout)) break; } if (static_branch_unlikely(&i2c_trace_msg_key)) { int i; for (i = 0; i < ret; i++) if (msgs[i].flags & I2C_M_RD) trace_i2c_reply(adap, &msgs[i], i); trace_i2c_result(adap, num, ret); } return ret; } EXPORT_SYMBOL(__i2c_transfer); /** * i2c_transfer - execute a single or combined I2C message * @adap: Handle to I2C bus * @msgs: One or more messages to execute before STOP is issued to * terminate the operation; each message begins with a START. * @num: Number of messages to be executed. * * Returns negative errno, else the number of messages executed. * * Note that there is no requirement that each message be sent to * the same slave address, although that is the most common model. */ int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num) { int ret; /* REVISIT the fault reporting model here is weak: * * - When we get an error after receiving N bytes from a slave, * there is no way to report "N". * * - When we get a NAK after transmitting N bytes to a slave, * there is no way to report "N" ... or to let the master * continue executing the rest of this combined message, if * that's the appropriate response. * * - When for example "num" is two and we successfully complete * the first message but get an error part way through the * second, it's unclear whether that should be reported as * one (discarding status on the second message) or errno * (discarding status on the first one). */ ret = __i2c_lock_bus_helper(adap); if (ret) return ret; ret = __i2c_transfer(adap, msgs, num); i2c_unlock_bus(adap, I2C_LOCK_SEGMENT); return ret; } EXPORT_SYMBOL(i2c_transfer); /** * i2c_transfer_buffer_flags - issue a single I2C message transferring data * to/from a buffer * @client: Handle to slave device * @buf: Where the data is stored * @count: How many bytes to transfer, must be less than 64k since msg.len is u16 * @flags: The flags to be used for the message, e.g. I2C_M_RD for reads * * Returns negative errno, or else the number of bytes transferred. */ int i2c_transfer_buffer_flags(const struct i2c_client *client, char *buf, int count, u16 flags) { int ret; struct i2c_msg msg = { .addr = client->addr, .flags = flags | (client->flags & I2C_M_TEN), .len = count, .buf = buf, }; ret = i2c_transfer(client->adapter, &msg, 1); /* * If everything went ok (i.e. 1 msg transferred), return #bytes * transferred, else error code. */ return (ret == 1) ? count : ret; } EXPORT_SYMBOL(i2c_transfer_buffer_flags); /** * i2c_get_device_id - get manufacturer, part id and die revision of a device * @client: The device to query * @id: The queried information * * Returns negative errno on error, zero on success. */ int i2c_get_device_id(const struct i2c_client *client, struct i2c_device_identity *id) { struct i2c_adapter *adap = client->adapter; union i2c_smbus_data raw_id; int ret; if (!i2c_check_functionality(adap, I2C_FUNC_SMBUS_READ_I2C_BLOCK)) return -EOPNOTSUPP; raw_id.block[0] = 3; ret = i2c_smbus_xfer(adap, I2C_ADDR_DEVICE_ID, 0, I2C_SMBUS_READ, client->addr << 1, I2C_SMBUS_I2C_BLOCK_DATA, &raw_id); if (ret) return ret; id->manufacturer_id = (raw_id.block[1] << 4) | (raw_id.block[2] >> 4); id->part_id = ((raw_id.block[2] & 0xf) << 5) | (raw_id.block[3] >> 3); id->die_revision = raw_id.block[3] & 0x7; return 0; } EXPORT_SYMBOL_GPL(i2c_get_device_id); /** * i2c_client_get_device_id - get the driver match table entry of a device * @client: the device to query. The device must be bound to a driver * * Returns a pointer to the matching entry if found, NULL otherwise. */ const struct i2c_device_id *i2c_client_get_device_id(const struct i2c_client *client) { const struct i2c_driver *drv = to_i2c_driver(client->dev.driver); return i2c_match_id(drv->id_table, client); } EXPORT_SYMBOL_GPL(i2c_client_get_device_id); /* ---------------------------------------------------- * the i2c address scanning function * Will not work for 10-bit addresses! * ---------------------------------------------------- */ /* * Legacy default probe function, mostly relevant for SMBus. The default * probe method is a quick write, but it is known to corrupt the 24RF08 * EEPROMs due to a state machine bug, and could also irreversibly * write-protect some EEPROMs, so for address ranges 0x30-0x37 and 0x50-0x5f, * we use a short byte read instead. Also, some bus drivers don't implement * quick write, so we fallback to a byte read in that case too. * On x86, there is another special case for FSC hardware monitoring chips, * which want regular byte reads (address 0x73.) Fortunately, these are the * only known chips using this I2C address on PC hardware. * Returns 1 if probe succeeded, 0 if not. */ static int i2c_default_probe(struct i2c_adapter *adap, unsigned short addr) { int err; union i2c_smbus_data dummy; #ifdef CONFIG_X86 if (addr == 0x73 && (adap->class & I2C_CLASS_HWMON) && i2c_check_functionality(adap, I2C_FUNC_SMBUS_READ_BYTE_DATA)) err = i2c_smbus_xfer(adap, addr, 0, I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE_DATA, &dummy); else #endif if (!((addr & ~0x07) == 0x30 || (addr & ~0x0f) == 0x50) && i2c_check_functionality(adap, I2C_FUNC_SMBUS_QUICK)) err = i2c_smbus_xfer(adap, addr, 0, I2C_SMBUS_WRITE, 0, I2C_SMBUS_QUICK, NULL); else if (i2c_check_functionality(adap, I2C_FUNC_SMBUS_READ_BYTE)) err = i2c_smbus_xfer(adap, addr, 0, I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &dummy); else { dev_warn(&adap->dev, "No suitable probing method supported for address 0x%02X\n", addr); err = -EOPNOTSUPP; } return err >= 0; } static int i2c_detect_address(struct i2c_client *temp_client, struct i2c_driver *driver) { struct i2c_board_info info; struct i2c_adapter *adapter = temp_client->adapter; int addr = temp_client->addr; int err; /* Make sure the address is valid */ err = i2c_check_7bit_addr_validity_strict(addr); if (err) { dev_warn(&adapter->dev, "Invalid probe address 0x%02x\n", addr); return err; } /* Skip if already in use (7 bit, no need to encode flags) */ if (i2c_check_addr_busy(adapter, addr)) return 0; /* Make sure there is something at this address */ if (!i2c_default_probe(adapter, addr)) return 0; /* Finally call the custom detection function */ memset(&info, 0, sizeof(struct i2c_board_info)); info.addr = addr; err = driver->detect(temp_client, &info); if (err) { /* -ENODEV is returned if the detection fails. We catch it here as this isn't an error. */ return err == -ENODEV ? 0 : err; } /* Consistency check */ if (info.type[0] == '\0') { dev_err(&adapter->dev, "%s detection function provided no name for 0x%x\n", driver->driver.name, addr); } else { struct i2c_client *client; /* Detection succeeded, instantiate the device */ if (adapter->class & I2C_CLASS_DEPRECATED) dev_warn(&adapter->dev, "This adapter will soon drop class based instantiation of devices. " "Please make sure client 0x%02x gets instantiated by other means. " "Check 'Documentation/i2c/instantiating-devices.rst' for details.\n", info.addr); dev_dbg(&adapter->dev, "Creating %s at 0x%02x\n", info.type, info.addr); client = i2c_new_client_device(adapter, &info); if (!IS_ERR(client)) list_add_tail(&client->detected, &driver->clients); else dev_err(&adapter->dev, "Failed creating %s at 0x%02x\n", info.type, info.addr); } return 0; } static int i2c_detect(struct i2c_adapter *adapter, struct i2c_driver *driver) { const unsigned short *address_list; struct i2c_client *temp_client; int i, err = 0; address_list = driver->address_list; if (!driver->detect || !address_list) return 0; /* Warn that the adapter lost class based instantiation */ if (adapter->class == I2C_CLASS_DEPRECATED) { dev_dbg(&adapter->dev, "This adapter dropped support for I2C classes and won't auto-detect %s devices anymore. " "If you need it, check 'Documentation/i2c/instantiating-devices.rst' for alternatives.\n", driver->driver.name); return 0; } /* Stop here if the classes do not match */ if (!(adapter->class & driver->class)) return 0; /* Set up a temporary client to help detect callback */ temp_client = kzalloc(sizeof(*temp_client), GFP_KERNEL); if (!temp_client) return -ENOMEM; temp_client->adapter = adapter; for (i = 0; address_list[i] != I2C_CLIENT_END; i += 1) { dev_dbg(&adapter->dev, "found normal entry for adapter %d, addr 0x%02x\n", i2c_adapter_id(adapter), address_list[i]); temp_client->addr = address_list[i]; err = i2c_detect_address(temp_client, driver); if (unlikely(err)) break; } kfree(temp_client); return err; } int i2c_probe_func_quick_read(struct i2c_adapter *adap, unsigned short addr) { return i2c_smbus_xfer(adap, addr, 0, I2C_SMBUS_READ, 0, I2C_SMBUS_QUICK, NULL) >= 0; } EXPORT_SYMBOL_GPL(i2c_probe_func_quick_read); struct i2c_client * i2c_new_scanned_device(struct i2c_adapter *adap, struct i2c_board_info *info, unsigned short const *addr_list, int (*probe)(struct i2c_adapter *adap, unsigned short addr)) { int i; if (!probe) probe = i2c_default_probe; for (i = 0; addr_list[i] != I2C_CLIENT_END; i++) { /* Check address validity */ if (i2c_check_7bit_addr_validity_strict(addr_list[i]) < 0) { dev_warn(&adap->dev, "Invalid 7-bit address 0x%02x\n", addr_list[i]); continue; } /* Check address availability (7 bit, no need to encode flags) */ if (i2c_check_addr_busy(adap, addr_list[i])) { dev_dbg(&adap->dev, "Address 0x%02x already in use, not probing\n", addr_list[i]); continue; } /* Test address responsiveness */ if (probe(adap, addr_list[i])) break; } if (addr_list[i] == I2C_CLIENT_END) { dev_dbg(&adap->dev, "Probing failed, no device found\n"); return ERR_PTR(-ENODEV); } info->addr = addr_list[i]; return i2c_new_client_device(adap, info); } EXPORT_SYMBOL_GPL(i2c_new_scanned_device); struct i2c_adapter *i2c_get_adapter(int nr) { struct i2c_adapter *adapter; mutex_lock(&core_lock); adapter = idr_find(&i2c_adapter_idr, nr); if (!adapter) goto exit; if (try_module_get(adapter->owner)) get_device(&adapter->dev); else adapter = NULL; exit: mutex_unlock(&core_lock); return adapter; } EXPORT_SYMBOL(i2c_get_adapter); void i2c_put_adapter(struct i2c_adapter *adap) { if (!adap) return; module_put(adap->owner); /* Should be last, otherwise we risk use-after-free with 'adap' */ put_device(&adap->dev); } EXPORT_SYMBOL(i2c_put_adapter); /** * i2c_get_dma_safe_msg_buf() - get a DMA safe buffer for the given i2c_msg * @msg: the message to be checked * @threshold: the minimum number of bytes for which using DMA makes sense. * Should at least be 1. * * Return: NULL if a DMA safe buffer was not obtained. Use msg->buf with PIO. * Or a valid pointer to be used with DMA. After use, release it by * calling i2c_put_dma_safe_msg_buf(). * * This function must only be called from process context! */ u8 *i2c_get_dma_safe_msg_buf(struct i2c_msg *msg, unsigned int threshold) { /* also skip 0-length msgs for bogus thresholds of 0 */ if (!threshold) pr_debug("DMA buffer for addr=0x%02x with length 0 is bogus\n", msg->addr); if (msg->len < threshold || msg->len == 0) return NULL; if (msg->flags & I2C_M_DMA_SAFE) return msg->buf; pr_debug("using bounce buffer for addr=0x%02x, len=%d\n", msg->addr, msg->len); if (msg->flags & I2C_M_RD) return kzalloc(msg->len, GFP_KERNEL); else return kmemdup(msg->buf, msg->len, GFP_KERNEL); } EXPORT_SYMBOL_GPL(i2c_get_dma_safe_msg_buf); /** * i2c_put_dma_safe_msg_buf - release DMA safe buffer and sync with i2c_msg * @buf: the buffer obtained from i2c_get_dma_safe_msg_buf(). May be NULL. * @msg: the message which the buffer corresponds to * @xferred: bool saying if the message was transferred */ void i2c_put_dma_safe_msg_buf(u8 *buf, struct i2c_msg *msg, bool xferred) { if (!buf || buf == msg->buf) return; if (xferred && msg->flags & I2C_M_RD) memcpy(msg->buf, buf, msg->len); kfree(buf); } EXPORT_SYMBOL_GPL(i2c_put_dma_safe_msg_buf); MODULE_AUTHOR("Simon G. Vogl <simon@tk.uni-linz.ac.at>"); MODULE_DESCRIPTION("I2C-Bus main module"); MODULE_LICENSE("GPL"); |
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2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 | // SPDX-License-Identifier: GPL-2.0 /* * Implementation of the diskquota system for the LINUX operating system. QUOTA * is implemented using the BSD system call interface as the means of * communication with the user level. This file contains the generic routines * called by the different filesystems on allocation of an inode or block. * These routines take care of the administration needed to have a consistent * diskquota tracking system. The ideas of both user and group quotas are based * on the Melbourne quota system as used on BSD derived systems. The internal * implementation is based on one of the several variants of the LINUX * inode-subsystem with added complexity of the diskquota system. * * Author: Marco van Wieringen <mvw@planets.elm.net> * * Fixes: Dmitry Gorodchanin <pgmdsg@ibi.com>, 11 Feb 96 * * Revised list management to avoid races * -- Bill Hawes, <whawes@star.net>, 9/98 * * Fixed races in dquot_transfer(), dqget() and dquot_alloc_...(). * As the consequence the locking was moved from dquot_decr_...(), * dquot_incr_...() to calling functions. * invalidate_dquots() now writes modified dquots. * Serialized quota_off() and quota_on() for mount point. * Fixed a few bugs in grow_dquots(). * Fixed deadlock in write_dquot() - we no longer account quotas on * quota files * remove_dquot_ref() moved to inode.c - it now traverses through inodes * add_dquot_ref() restarts after blocking * Added check for bogus uid and fixed check for group in quotactl. * Jan Kara, <jack@suse.cz>, sponsored by SuSE CR, 10-11/99 * * Used struct list_head instead of own list struct * Invalidation of referenced dquots is no longer possible * Improved free_dquots list management * Quota and i_blocks are now updated in one place to avoid races * Warnings are now delayed so we won't block in critical section * Write updated not to require dquot lock * Jan Kara, <jack@suse.cz>, 9/2000 * * Added dynamic quota structure allocation * Jan Kara <jack@suse.cz> 12/2000 * * Rewritten quota interface. Implemented new quota format and * formats registering. * Jan Kara, <jack@suse.cz>, 2001,2002 * * New SMP locking. * Jan Kara, <jack@suse.cz>, 10/2002 * * Added journalled quota support, fix lock inversion problems * Jan Kara, <jack@suse.cz>, 2003,2004 * * (C) Copyright 1994 - 1997 Marco van Wieringen */ #include <linux/errno.h> #include <linux/kernel.h> #include <linux/fs.h> #include <linux/mount.h> #include <linux/mm.h> #include <linux/time.h> #include <linux/types.h> #include <linux/string.h> #include <linux/fcntl.h> #include <linux/stat.h> #include <linux/tty.h> #include <linux/file.h> #include <linux/slab.h> #include <linux/sysctl.h> #include <linux/init.h> #include <linux/module.h> #include <linux/proc_fs.h> #include <linux/security.h> #include <linux/sched.h> #include <linux/cred.h> #include <linux/kmod.h> #include <linux/namei.h> #include <linux/capability.h> #include <linux/quotaops.h> #include <linux/blkdev.h> #include <linux/sched/mm.h> #include <linux/uaccess.h> /* * There are five quota SMP locks: * * dq_list_lock protects all lists with quotas and quota formats. * * dquot->dq_dqb_lock protects data from dq_dqb * * inode->i_lock protects inode->i_blocks, i_bytes and also guards * consistency of dquot->dq_dqb with inode->i_blocks, i_bytes so that * dquot_transfer() can stabilize amount it transfers * * dq_data_lock protects mem_dqinfo structures and modifications of dquot * pointers in the inode * * dq_state_lock protects modifications of quota state (on quotaon and * quotaoff) and readers who care about latest values take it as well. * * The spinlock ordering is hence: * dq_data_lock > dq_list_lock > i_lock > dquot->dq_dqb_lock, * dq_list_lock > dq_state_lock * * Note that some things (eg. sb pointer, type, id) doesn't change during * the life of the dquot structure and so needn't to be protected by a lock * * Operation accessing dquots via inode pointers are protected by dquot_srcu. * Operation of reading pointer needs srcu_read_lock(&dquot_srcu), and * synchronize_srcu(&dquot_srcu) is called after clearing pointers from * inode and before dropping dquot references to avoid use of dquots after * they are freed. dq_data_lock is used to serialize the pointer setting and * clearing operations. * Special care needs to be taken about S_NOQUOTA inode flag (marking that * inode is a quota file). Functions adding pointers from inode to dquots have * to check this flag under dq_data_lock and then (if S_NOQUOTA is not set) they * have to do all pointer modifications before dropping dq_data_lock. This makes * sure they cannot race with quotaon which first sets S_NOQUOTA flag and * then drops all pointers to dquots from an inode. * * Each dquot has its dq_lock mutex. Dquot is locked when it is being read to * memory (or space for it is being allocated) on the first dqget(), when it is * being written out, and when it is being released on the last dqput(). The * allocation and release operations are serialized by the dq_lock and by * checking the use count in dquot_release(). * * Lock ordering (including related VFS locks) is the following: * s_umount > i_mutex > journal_lock > dquot->dq_lock > dqio_sem */ static __cacheline_aligned_in_smp DEFINE_SPINLOCK(dq_list_lock); static __cacheline_aligned_in_smp DEFINE_SPINLOCK(dq_state_lock); __cacheline_aligned_in_smp DEFINE_SPINLOCK(dq_data_lock); EXPORT_SYMBOL(dq_data_lock); DEFINE_STATIC_SRCU(dquot_srcu); static DECLARE_WAIT_QUEUE_HEAD(dquot_ref_wq); void __quota_error(struct super_block *sb, const char *func, const char *fmt, ...) { if (printk_ratelimit()) { va_list args; struct va_format vaf; va_start(args, fmt); vaf.fmt = fmt; vaf.va = &args; printk(KERN_ERR "Quota error (device %s): %s: %pV\n", sb->s_id, func, &vaf); va_end(args); } } EXPORT_SYMBOL(__quota_error); #if defined(CONFIG_QUOTA_DEBUG) || defined(CONFIG_PRINT_QUOTA_WARNING) static char *quotatypes[] = INITQFNAMES; #endif static struct quota_format_type *quota_formats; /* List of registered formats */ static struct quota_module_name module_names[] = INIT_QUOTA_MODULE_NAMES; /* SLAB cache for dquot structures */ static struct kmem_cache *dquot_cachep; /* workqueue for work quota_release_work*/ static struct workqueue_struct *quota_unbound_wq; void register_quota_format(struct quota_format_type *fmt) { spin_lock(&dq_list_lock); fmt->qf_next = quota_formats; quota_formats = fmt; spin_unlock(&dq_list_lock); } EXPORT_SYMBOL(register_quota_format); void unregister_quota_format(struct quota_format_type *fmt) { struct quota_format_type **actqf; spin_lock(&dq_list_lock); for (actqf = "a_formats; *actqf && *actqf != fmt; actqf = &(*actqf)->qf_next) ; if (*actqf) *actqf = (*actqf)->qf_next; spin_unlock(&dq_list_lock); } EXPORT_SYMBOL(unregister_quota_format); static struct quota_format_type *find_quota_format(int id) { struct quota_format_type *actqf; spin_lock(&dq_list_lock); for (actqf = quota_formats; actqf && actqf->qf_fmt_id != id; actqf = actqf->qf_next) ; if (!actqf || !try_module_get(actqf->qf_owner)) { int qm; spin_unlock(&dq_list_lock); for (qm = 0; module_names[qm].qm_fmt_id && module_names[qm].qm_fmt_id != id; qm++) ; if (!module_names[qm].qm_fmt_id || request_module(module_names[qm].qm_mod_name)) return NULL; spin_lock(&dq_list_lock); for (actqf = quota_formats; actqf && actqf->qf_fmt_id != id; actqf = actqf->qf_next) ; if (actqf && !try_module_get(actqf->qf_owner)) actqf = NULL; } spin_unlock(&dq_list_lock); return actqf; } static void put_quota_format(struct quota_format_type *fmt) { module_put(fmt->qf_owner); } /* * Dquot List Management: * The quota code uses five lists for dquot management: the inuse_list, * releasing_dquots, free_dquots, dqi_dirty_list, and dquot_hash[] array. * A single dquot structure may be on some of those lists, depending on * its current state. * * All dquots are placed to the end of inuse_list when first created, and this * list is used for invalidate operation, which must look at every dquot. * * When the last reference of a dquot is dropped, the dquot is added to * releasing_dquots. We'll then queue work item which will call * synchronize_srcu() and after that perform the final cleanup of all the * dquots on the list. Each cleaned up dquot is moved to free_dquots list. * Both releasing_dquots and free_dquots use the dq_free list_head in the dquot * struct. * * Unused and cleaned up dquots are in the free_dquots list and this list is * searched whenever we need an available dquot. Dquots are removed from the * list as soon as they are used again and dqstats.free_dquots gives the number * of dquots on the list. When dquot is invalidated it's completely released * from memory. * * Dirty dquots are added to the dqi_dirty_list of quota_info when mark * dirtied, and this list is searched when writing dirty dquots back to * quota file. Note that some filesystems do dirty dquot tracking on their * own (e.g. in a journal) and thus don't use dqi_dirty_list. * * Dquots with a specific identity (device, type and id) are placed on * one of the dquot_hash[] hash chains. The provides an efficient search * mechanism to locate a specific dquot. */ static LIST_HEAD(inuse_list); static LIST_HEAD(free_dquots); static LIST_HEAD(releasing_dquots); static unsigned int dq_hash_bits, dq_hash_mask; static struct hlist_head *dquot_hash; struct dqstats dqstats; EXPORT_SYMBOL(dqstats); static qsize_t inode_get_rsv_space(struct inode *inode); static qsize_t __inode_get_rsv_space(struct inode *inode); static int __dquot_initialize(struct inode *inode, int type); static void quota_release_workfn(struct work_struct *work); static DECLARE_DELAYED_WORK(quota_release_work, quota_release_workfn); static inline unsigned int hashfn(const struct super_block *sb, struct kqid qid) { unsigned int id = from_kqid(&init_user_ns, qid); int type = qid.type; unsigned long tmp; tmp = (((unsigned long)sb>>L1_CACHE_SHIFT) ^ id) * (MAXQUOTAS - type); return (tmp + (tmp >> dq_hash_bits)) & dq_hash_mask; } /* * Following list functions expect dq_list_lock to be held */ static inline void insert_dquot_hash(struct dquot *dquot) { struct hlist_head *head; head = dquot_hash + hashfn(dquot->dq_sb, dquot->dq_id); hlist_add_head(&dquot->dq_hash, head); } static inline void remove_dquot_hash(struct dquot *dquot) { hlist_del_init(&dquot->dq_hash); } static struct dquot *find_dquot(unsigned int hashent, struct super_block *sb, struct kqid qid) { struct dquot *dquot; hlist_for_each_entry(dquot, dquot_hash+hashent, dq_hash) if (dquot->dq_sb == sb && qid_eq(dquot->dq_id, qid)) return dquot; return NULL; } /* Add a dquot to the tail of the free list */ static inline void put_dquot_last(struct dquot *dquot) { list_add_tail(&dquot->dq_free, &free_dquots); dqstats_inc(DQST_FREE_DQUOTS); } static inline void put_releasing_dquots(struct dquot *dquot) { list_add_tail(&dquot->dq_free, &releasing_dquots); set_bit(DQ_RELEASING_B, &dquot->dq_flags); } static inline void remove_free_dquot(struct dquot *dquot) { if (list_empty(&dquot->dq_free)) return; list_del_init(&dquot->dq_free); if (!test_bit(DQ_RELEASING_B, &dquot->dq_flags)) dqstats_dec(DQST_FREE_DQUOTS); else clear_bit(DQ_RELEASING_B, &dquot->dq_flags); } static inline void put_inuse(struct dquot *dquot) { /* We add to the back of inuse list so we don't have to restart * when traversing this list and we block */ list_add_tail(&dquot->dq_inuse, &inuse_list); dqstats_inc(DQST_ALLOC_DQUOTS); } static inline void remove_inuse(struct dquot *dquot) { dqstats_dec(DQST_ALLOC_DQUOTS); list_del(&dquot->dq_inuse); } /* * End of list functions needing dq_list_lock */ static void wait_on_dquot(struct dquot *dquot) { mutex_lock(&dquot->dq_lock); mutex_unlock(&dquot->dq_lock); } static inline int dquot_active(struct dquot *dquot) { return test_bit(DQ_ACTIVE_B, &dquot->dq_flags); } static inline int dquot_dirty(struct dquot *dquot) { return test_bit(DQ_MOD_B, &dquot->dq_flags); } static inline int mark_dquot_dirty(struct dquot *dquot) { return dquot->dq_sb->dq_op->mark_dirty(dquot); } /* Mark dquot dirty in atomic manner, and return it's old dirty flag state */ int dquot_mark_dquot_dirty(struct dquot *dquot) { int ret = 1; if (!dquot_active(dquot)) return 0; if (sb_dqopt(dquot->dq_sb)->flags & DQUOT_NOLIST_DIRTY) return test_and_set_bit(DQ_MOD_B, &dquot->dq_flags); /* If quota is dirty already, we don't have to acquire dq_list_lock */ if (dquot_dirty(dquot)) return 1; spin_lock(&dq_list_lock); if (!test_and_set_bit(DQ_MOD_B, &dquot->dq_flags)) { list_add(&dquot->dq_dirty, &sb_dqopt(dquot->dq_sb)-> info[dquot->dq_id.type].dqi_dirty_list); ret = 0; } spin_unlock(&dq_list_lock); return ret; } EXPORT_SYMBOL(dquot_mark_dquot_dirty); /* Dirtify all the dquots - this can block when journalling */ static inline int mark_all_dquot_dirty(struct dquot __rcu * const *dquots) { int ret, err, cnt; struct dquot *dquot; ret = err = 0; for (cnt = 0; cnt < MAXQUOTAS; cnt++) { dquot = srcu_dereference(dquots[cnt], &dquot_srcu); if (dquot) /* Even in case of error we have to continue */ ret = mark_dquot_dirty(dquot); if (!err && ret < 0) err = ret; } return err; } static inline void dqput_all(struct dquot **dquot) { unsigned int cnt; for (cnt = 0; cnt < MAXQUOTAS; cnt++) dqput(dquot[cnt]); } static inline int clear_dquot_dirty(struct dquot *dquot) { if (sb_dqopt(dquot->dq_sb)->flags & DQUOT_NOLIST_DIRTY) return test_and_clear_bit(DQ_MOD_B, &dquot->dq_flags); spin_lock(&dq_list_lock); if (!test_and_clear_bit(DQ_MOD_B, &dquot->dq_flags)) { spin_unlock(&dq_list_lock); return 0; } list_del_init(&dquot->dq_dirty); spin_unlock(&dq_list_lock); return 1; } void mark_info_dirty(struct super_block *sb, int type) { spin_lock(&dq_data_lock); sb_dqopt(sb)->info[type].dqi_flags |= DQF_INFO_DIRTY; spin_unlock(&dq_data_lock); } EXPORT_SYMBOL(mark_info_dirty); /* * Read dquot from disk and alloc space for it */ int dquot_acquire(struct dquot *dquot) { int ret = 0, ret2 = 0; unsigned int memalloc; struct quota_info *dqopt = sb_dqopt(dquot->dq_sb); mutex_lock(&dquot->dq_lock); memalloc = memalloc_nofs_save(); if (!test_bit(DQ_READ_B, &dquot->dq_flags)) { ret = dqopt->ops[dquot->dq_id.type]->read_dqblk(dquot); if (ret < 0) goto out_iolock; } /* Make sure flags update is visible after dquot has been filled */ smp_mb__before_atomic(); set_bit(DQ_READ_B, &dquot->dq_flags); /* Instantiate dquot if needed */ if (!dquot_active(dquot) && !dquot->dq_off) { ret = dqopt->ops[dquot->dq_id.type]->commit_dqblk(dquot); /* Write the info if needed */ if (info_dirty(&dqopt->info[dquot->dq_id.type])) { ret2 = dqopt->ops[dquot->dq_id.type]->write_file_info( dquot->dq_sb, dquot->dq_id.type); } if (ret < 0) goto out_iolock; if (ret2 < 0) { ret = ret2; goto out_iolock; } } /* * Make sure flags update is visible after on-disk struct has been * allocated. Paired with smp_rmb() in dqget(). */ smp_mb__before_atomic(); set_bit(DQ_ACTIVE_B, &dquot->dq_flags); out_iolock: memalloc_nofs_restore(memalloc); mutex_unlock(&dquot->dq_lock); return ret; } EXPORT_SYMBOL(dquot_acquire); /* * Write dquot to disk */ int dquot_commit(struct dquot *dquot) { int ret = 0; unsigned int memalloc; struct quota_info *dqopt = sb_dqopt(dquot->dq_sb); mutex_lock(&dquot->dq_lock); memalloc = memalloc_nofs_save(); if (!clear_dquot_dirty(dquot)) goto out_lock; /* Inactive dquot can be only if there was error during read/init * => we have better not writing it */ if (dquot_active(dquot)) ret = dqopt->ops[dquot->dq_id.type]->commit_dqblk(dquot); else ret = -EIO; out_lock: memalloc_nofs_restore(memalloc); mutex_unlock(&dquot->dq_lock); return ret; } EXPORT_SYMBOL(dquot_commit); /* * Release dquot */ int dquot_release(struct dquot *dquot) { int ret = 0, ret2 = 0; unsigned int memalloc; struct quota_info *dqopt = sb_dqopt(dquot->dq_sb); mutex_lock(&dquot->dq_lock); memalloc = memalloc_nofs_save(); /* Check whether we are not racing with some other dqget() */ if (dquot_is_busy(dquot)) goto out_dqlock; if (dqopt->ops[dquot->dq_id.type]->release_dqblk) { ret = dqopt->ops[dquot->dq_id.type]->release_dqblk(dquot); /* Write the info */ if (info_dirty(&dqopt->info[dquot->dq_id.type])) { ret2 = dqopt->ops[dquot->dq_id.type]->write_file_info( dquot->dq_sb, dquot->dq_id.type); } if (ret >= 0) ret = ret2; } clear_bit(DQ_ACTIVE_B, &dquot->dq_flags); out_dqlock: memalloc_nofs_restore(memalloc); mutex_unlock(&dquot->dq_lock); return ret; } EXPORT_SYMBOL(dquot_release); void dquot_destroy(struct dquot *dquot) { kmem_cache_free(dquot_cachep, dquot); } EXPORT_SYMBOL(dquot_destroy); static inline void do_destroy_dquot(struct dquot *dquot) { dquot->dq_sb->dq_op->destroy_dquot(dquot); } /* Invalidate all dquots on the list. Note that this function is called after * quota is disabled and pointers from inodes removed so there cannot be new * quota users. There can still be some users of quotas due to inodes being * just deleted or pruned by prune_icache() (those are not attached to any * list) or parallel quotactl call. We have to wait for such users. */ static void invalidate_dquots(struct super_block *sb, int type) { struct dquot *dquot, *tmp; restart: flush_delayed_work("a_release_work); spin_lock(&dq_list_lock); list_for_each_entry_safe(dquot, tmp, &inuse_list, dq_inuse) { if (dquot->dq_sb != sb) continue; if (dquot->dq_id.type != type) continue; /* Wait for dquot users */ if (atomic_read(&dquot->dq_count)) { atomic_inc(&dquot->dq_count); spin_unlock(&dq_list_lock); /* * Once dqput() wakes us up, we know it's time to free * the dquot. * IMPORTANT: we rely on the fact that there is always * at most one process waiting for dquot to free. * Otherwise dq_count would be > 1 and we would never * wake up. */ wait_event(dquot_ref_wq, atomic_read(&dquot->dq_count) == 1); dqput(dquot); /* At this moment dquot() need not exist (it could be * reclaimed by prune_dqcache(). Hence we must * restart. */ goto restart; } /* * The last user already dropped its reference but dquot didn't * get fully cleaned up yet. Restart the scan which flushes the * work cleaning up released dquots. */ if (test_bit(DQ_RELEASING_B, &dquot->dq_flags)) { spin_unlock(&dq_list_lock); goto restart; } /* * Quota now has no users and it has been written on last * dqput() */ remove_dquot_hash(dquot); remove_free_dquot(dquot); remove_inuse(dquot); do_destroy_dquot(dquot); } spin_unlock(&dq_list_lock); } /* Call callback for every active dquot on given filesystem */ int dquot_scan_active(struct super_block *sb, int (*fn)(struct dquot *dquot, unsigned long priv), unsigned long priv) { struct dquot *dquot, *old_dquot = NULL; int ret = 0; WARN_ON_ONCE(!rwsem_is_locked(&sb->s_umount)); spin_lock(&dq_list_lock); list_for_each_entry(dquot, &inuse_list, dq_inuse) { if (!dquot_active(dquot)) continue; if (dquot->dq_sb != sb) continue; /* Now we have active dquot so we can just increase use count */ atomic_inc(&dquot->dq_count); spin_unlock(&dq_list_lock); dqput(old_dquot); old_dquot = dquot; /* * ->release_dquot() can be racing with us. Our reference * protects us from new calls to it so just wait for any * outstanding call and recheck the DQ_ACTIVE_B after that. */ wait_on_dquot(dquot); if (dquot_active(dquot)) { ret = fn(dquot, priv); if (ret < 0) goto out; } spin_lock(&dq_list_lock); /* We are safe to continue now because our dquot could not * be moved out of the inuse list while we hold the reference */ } spin_unlock(&dq_list_lock); out: dqput(old_dquot); return ret; } EXPORT_SYMBOL(dquot_scan_active); static inline int dquot_write_dquot(struct dquot *dquot) { int ret = dquot->dq_sb->dq_op->write_dquot(dquot); if (ret < 0) { quota_error(dquot->dq_sb, "Can't write quota structure " "(error %d). Quota may get out of sync!", ret); /* Clear dirty bit anyway to avoid infinite loop. */ clear_dquot_dirty(dquot); } return ret; } /* Write all dquot structures to quota files */ int dquot_writeback_dquots(struct super_block *sb, int type) { struct list_head dirty; struct dquot *dquot; struct quota_info *dqopt = sb_dqopt(sb); int cnt; int err, ret = 0; WARN_ON_ONCE(!rwsem_is_locked(&sb->s_umount)); flush_delayed_work("a_release_work); for (cnt = 0; cnt < MAXQUOTAS; cnt++) { if (type != -1 && cnt != type) continue; if (!sb_has_quota_active(sb, cnt)) continue; spin_lock(&dq_list_lock); /* Move list away to avoid livelock. */ list_replace_init(&dqopt->info[cnt].dqi_dirty_list, &dirty); while (!list_empty(&dirty)) { dquot = list_first_entry(&dirty, struct dquot, dq_dirty); WARN_ON(!dquot_active(dquot)); /* If the dquot is releasing we should not touch it */ if (test_bit(DQ_RELEASING_B, &dquot->dq_flags)) { spin_unlock(&dq_list_lock); flush_delayed_work("a_release_work); spin_lock(&dq_list_lock); continue; } /* Now we have active dquot from which someone is * holding reference so we can safely just increase * use count */ dqgrab(dquot); spin_unlock(&dq_list_lock); err = dquot_write_dquot(dquot); if (err && !ret) ret = err; dqput(dquot); spin_lock(&dq_list_lock); } spin_unlock(&dq_list_lock); } for (cnt = 0; cnt < MAXQUOTAS; cnt++) if ((cnt == type || type == -1) && sb_has_quota_active(sb, cnt) && info_dirty(&dqopt->info[cnt])) sb->dq_op->write_info(sb, cnt); dqstats_inc(DQST_SYNCS); return ret; } EXPORT_SYMBOL(dquot_writeback_dquots); /* Write all dquot structures to disk and make them visible from userspace */ int dquot_quota_sync(struct super_block *sb, int type) { struct quota_info *dqopt = sb_dqopt(sb); int cnt; int ret; ret = dquot_writeback_dquots(sb, type); if (ret) return ret; if (dqopt->flags & DQUOT_QUOTA_SYS_FILE) return 0; /* This is not very clever (and fast) but currently I don't know about * any other simple way of getting quota data to disk and we must get * them there for userspace to be visible... */ if (sb->s_op->sync_fs) { ret = sb->s_op->sync_fs(sb, 1); if (ret) return ret; } ret = sync_blockdev(sb->s_bdev); if (ret) return ret; /* * Now when everything is written we can discard the pagecache so * that userspace sees the changes. */ for (cnt = 0; cnt < MAXQUOTAS; cnt++) { if (type != -1 && cnt != type) continue; if (!sb_has_quota_active(sb, cnt)) continue; inode_lock(dqopt->files[cnt]); truncate_inode_pages(&dqopt->files[cnt]->i_data, 0); inode_unlock(dqopt->files[cnt]); } return 0; } EXPORT_SYMBOL(dquot_quota_sync); static unsigned long dqcache_shrink_scan(struct shrinker *shrink, struct shrink_control *sc) { struct dquot *dquot; unsigned long freed = 0; spin_lock(&dq_list_lock); while (!list_empty(&free_dquots) && sc->nr_to_scan) { dquot = list_first_entry(&free_dquots, struct dquot, dq_free); remove_dquot_hash(dquot); remove_free_dquot(dquot); remove_inuse(dquot); do_destroy_dquot(dquot); sc->nr_to_scan--; freed++; } spin_unlock(&dq_list_lock); return freed; } static unsigned long dqcache_shrink_count(struct shrinker *shrink, struct shrink_control *sc) { return vfs_pressure_ratio( percpu_counter_read_positive(&dqstats.counter[DQST_FREE_DQUOTS])); } /* * Safely release dquot and put reference to dquot. */ static void quota_release_workfn(struct work_struct *work) { struct dquot *dquot; struct list_head rls_head; spin_lock(&dq_list_lock); /* Exchange the list head to avoid livelock. */ list_replace_init(&releasing_dquots, &rls_head); spin_unlock(&dq_list_lock); synchronize_srcu(&dquot_srcu); restart: spin_lock(&dq_list_lock); while (!list_empty(&rls_head)) { dquot = list_first_entry(&rls_head, struct dquot, dq_free); WARN_ON_ONCE(atomic_read(&dquot->dq_count)); /* * Note that DQ_RELEASING_B protects us from racing with * invalidate_dquots() calls so we are safe to work with the * dquot even after we drop dq_list_lock. */ if (dquot_dirty(dquot)) { spin_unlock(&dq_list_lock); /* Commit dquot before releasing */ dquot_write_dquot(dquot); goto restart; } if (dquot_active(dquot)) { spin_unlock(&dq_list_lock); dquot->dq_sb->dq_op->release_dquot(dquot); goto restart; } /* Dquot is inactive and clean, now move it to free list */ remove_free_dquot(dquot); put_dquot_last(dquot); } spin_unlock(&dq_list_lock); } /* * Put reference to dquot */ void dqput(struct dquot *dquot) { if (!dquot) return; #ifdef CONFIG_QUOTA_DEBUG if (!atomic_read(&dquot->dq_count)) { quota_error(dquot->dq_sb, "trying to free free dquot of %s %d", quotatypes[dquot->dq_id.type], from_kqid(&init_user_ns, dquot->dq_id)); BUG(); } #endif dqstats_inc(DQST_DROPS); spin_lock(&dq_list_lock); if (atomic_read(&dquot->dq_count) > 1) { /* We have more than one user... nothing to do */ atomic_dec(&dquot->dq_count); /* Releasing dquot during quotaoff phase? */ if (!sb_has_quota_active(dquot->dq_sb, dquot->dq_id.type) && atomic_read(&dquot->dq_count) == 1) wake_up(&dquot_ref_wq); spin_unlock(&dq_list_lock); return; } /* Need to release dquot? */ WARN_ON_ONCE(!list_empty(&dquot->dq_free)); put_releasing_dquots(dquot); atomic_dec(&dquot->dq_count); spin_unlock(&dq_list_lock); queue_delayed_work(quota_unbound_wq, "a_release_work, 1); } EXPORT_SYMBOL(dqput); struct dquot *dquot_alloc(struct super_block *sb, int type) { return kmem_cache_zalloc(dquot_cachep, GFP_NOFS); } EXPORT_SYMBOL(dquot_alloc); static struct dquot *get_empty_dquot(struct super_block *sb, int type) { struct dquot *dquot; dquot = sb->dq_op->alloc_dquot(sb, type); if(!dquot) return NULL; mutex_init(&dquot->dq_lock); INIT_LIST_HEAD(&dquot->dq_free); INIT_LIST_HEAD(&dquot->dq_inuse); INIT_HLIST_NODE(&dquot->dq_hash); INIT_LIST_HEAD(&dquot->dq_dirty); dquot->dq_sb = sb; dquot->dq_id = make_kqid_invalid(type); atomic_set(&dquot->dq_count, 1); spin_lock_init(&dquot->dq_dqb_lock); return dquot; } /* * Get reference to dquot * * Locking is slightly tricky here. We are guarded from parallel quotaoff() * destroying our dquot by: * a) checking for quota flags under dq_list_lock and * b) getting a reference to dquot before we release dq_list_lock */ struct dquot *dqget(struct super_block *sb, struct kqid qid) { unsigned int hashent = hashfn(sb, qid); struct dquot *dquot, *empty = NULL; if (!qid_has_mapping(sb->s_user_ns, qid)) return ERR_PTR(-EINVAL); if (!sb_has_quota_active(sb, qid.type)) return ERR_PTR(-ESRCH); we_slept: spin_lock(&dq_list_lock); spin_lock(&dq_state_lock); if (!sb_has_quota_active(sb, qid.type)) { spin_unlock(&dq_state_lock); spin_unlock(&dq_list_lock); dquot = ERR_PTR(-ESRCH); goto out; } spin_unlock(&dq_state_lock); dquot = find_dquot(hashent, sb, qid); if (!dquot) { if (!empty) { spin_unlock(&dq_list_lock); empty = get_empty_dquot(sb, qid.type); if (!empty) schedule(); /* Try to wait for a moment... */ goto we_slept; } dquot = empty; empty = NULL; dquot->dq_id = qid; /* all dquots go on the inuse_list */ put_inuse(dquot); /* hash it first so it can be found */ insert_dquot_hash(dquot); spin_unlock(&dq_list_lock); dqstats_inc(DQST_LOOKUPS); } else { if (!atomic_read(&dquot->dq_count)) remove_free_dquot(dquot); atomic_inc(&dquot->dq_count); spin_unlock(&dq_list_lock); dqstats_inc(DQST_CACHE_HITS); dqstats_inc(DQST_LOOKUPS); } /* Wait for dq_lock - after this we know that either dquot_release() is * already finished or it will be canceled due to dq_count > 0 test */ wait_on_dquot(dquot); /* Read the dquot / allocate space in quota file */ if (!dquot_active(dquot)) { int err; err = sb->dq_op->acquire_dquot(dquot); if (err < 0) { dqput(dquot); dquot = ERR_PTR(err); goto out; } } /* * Make sure following reads see filled structure - paired with * smp_mb__before_atomic() in dquot_acquire(). */ smp_rmb(); /* Has somebody invalidated entry under us? */ WARN_ON_ONCE(hlist_unhashed(&dquot->dq_hash)); out: if (empty) do_destroy_dquot(empty); return dquot; } EXPORT_SYMBOL(dqget); static inline struct dquot __rcu **i_dquot(struct inode *inode) { return inode->i_sb->s_op->get_dquots(inode); } static int dqinit_needed(struct inode *inode, int type) { struct dquot __rcu * const *dquots; int cnt; if (IS_NOQUOTA(inode)) return 0; dquots = i_dquot(inode); if (type != -1) return !dquots[type]; for (cnt = 0; cnt < MAXQUOTAS; cnt++) if (!dquots[cnt]) return 1; return 0; } /* This routine is guarded by s_umount semaphore */ static int add_dquot_ref(struct super_block *sb, int type) { struct inode *inode, *old_inode = NULL; #ifdef CONFIG_QUOTA_DEBUG int reserved = 0; #endif int err = 0; spin_lock(&sb->s_inode_list_lock); list_for_each_entry(inode, &sb->s_inodes, i_sb_list) { spin_lock(&inode->i_lock); if ((inode_state_read(inode) & (I_FREEING | I_WILL_FREE | I_NEW)) || !atomic_read(&inode->i_writecount) || !dqinit_needed(inode, type)) { spin_unlock(&inode->i_lock); continue; } __iget(inode); spin_unlock(&inode->i_lock); spin_unlock(&sb->s_inode_list_lock); #ifdef CONFIG_QUOTA_DEBUG if (unlikely(inode_get_rsv_space(inode) > 0)) reserved = 1; #endif iput(old_inode); err = __dquot_initialize(inode, type); if (err) { iput(inode); goto out; } /* * We hold a reference to 'inode' so it couldn't have been * removed from s_inodes list while we dropped the * s_inode_list_lock. We cannot iput the inode now as we can be * holding the last reference and we cannot iput it under * s_inode_list_lock. So we keep the reference and iput it * later. */ old_inode = inode; cond_resched(); spin_lock(&sb->s_inode_list_lock); } spin_unlock(&sb->s_inode_list_lock); iput(old_inode); out: #ifdef CONFIG_QUOTA_DEBUG if (reserved) { quota_error(sb, "Writes happened before quota was turned on " "thus quota information is probably inconsistent. " "Please run quotacheck(8)"); } #endif return err; } static void remove_dquot_ref(struct super_block *sb, int type) { struct inode *inode; #ifdef CONFIG_QUOTA_DEBUG int reserved = 0; #endif spin_lock(&sb->s_inode_list_lock); list_for_each_entry(inode, &sb->s_inodes, i_sb_list) { /* * We have to scan also I_NEW inodes because they can already * have quota pointer initialized. Luckily, we need to touch * only quota pointers and these have separate locking * (dq_data_lock). */ spin_lock(&dq_data_lock); if (!IS_NOQUOTA(inode)) { struct dquot __rcu **dquots = i_dquot(inode); struct dquot *dquot = srcu_dereference_check( dquots[type], &dquot_srcu, lockdep_is_held(&dq_data_lock)); #ifdef CONFIG_QUOTA_DEBUG if (unlikely(inode_get_rsv_space(inode) > 0)) reserved = 1; #endif rcu_assign_pointer(dquots[type], NULL); if (dquot) dqput(dquot); } spin_unlock(&dq_data_lock); } spin_unlock(&sb->s_inode_list_lock); #ifdef CONFIG_QUOTA_DEBUG if (reserved) { printk(KERN_WARNING "VFS (%s): Writes happened after quota" " was disabled thus quota information is probably " "inconsistent. Please run quotacheck(8).\n", sb->s_id); } #endif } /* Gather all references from inodes and drop them */ static void drop_dquot_ref(struct super_block *sb, int type) { if (sb->dq_op) remove_dquot_ref(sb, type); } static inline void dquot_free_reserved_space(struct dquot *dquot, qsize_t number) { if (dquot->dq_dqb.dqb_rsvspace >= number) dquot->dq_dqb.dqb_rsvspace -= number; else { WARN_ON_ONCE(1); dquot->dq_dqb.dqb_rsvspace = 0; } if (dquot->dq_dqb.dqb_curspace + dquot->dq_dqb.dqb_rsvspace <= dquot->dq_dqb.dqb_bsoftlimit) dquot->dq_dqb.dqb_btime = (time64_t) 0; clear_bit(DQ_BLKS_B, &dquot->dq_flags); } static void dquot_decr_inodes(struct dquot *dquot, qsize_t number) { if (sb_dqopt(dquot->dq_sb)->flags & DQUOT_NEGATIVE_USAGE || dquot->dq_dqb.dqb_curinodes >= number) dquot->dq_dqb.dqb_curinodes -= number; else dquot->dq_dqb.dqb_curinodes = 0; if (dquot->dq_dqb.dqb_curinodes <= dquot->dq_dqb.dqb_isoftlimit) dquot->dq_dqb.dqb_itime = (time64_t) 0; clear_bit(DQ_INODES_B, &dquot->dq_flags); } static void dquot_decr_space(struct dquot *dquot, qsize_t number) { if (sb_dqopt(dquot->dq_sb)->flags & DQUOT_NEGATIVE_USAGE || dquot->dq_dqb.dqb_curspace >= number) dquot->dq_dqb.dqb_curspace -= number; else dquot->dq_dqb.dqb_curspace = 0; if (dquot->dq_dqb.dqb_curspace + dquot->dq_dqb.dqb_rsvspace <= dquot->dq_dqb.dqb_bsoftlimit) dquot->dq_dqb.dqb_btime = (time64_t) 0; clear_bit(DQ_BLKS_B, &dquot->dq_flags); } struct dquot_warn { struct super_block *w_sb; struct kqid w_dq_id; short w_type; }; static int warning_issued(struct dquot *dquot, const int warntype) { int flag = (warntype == QUOTA_NL_BHARDWARN || warntype == QUOTA_NL_BSOFTLONGWARN) ? DQ_BLKS_B : ((warntype == QUOTA_NL_IHARDWARN || warntype == QUOTA_NL_ISOFTLONGWARN) ? DQ_INODES_B : 0); if (!flag) return 0; return test_and_set_bit(flag, &dquot->dq_flags); } #ifdef CONFIG_PRINT_QUOTA_WARNING static int flag_print_warnings = 1; static int need_print_warning(struct dquot_warn *warn) { if (!flag_print_warnings) return 0; switch (warn->w_dq_id.type) { case USRQUOTA: return uid_eq(current_fsuid(), warn->w_dq_id.uid); case GRPQUOTA: return in_group_p(warn->w_dq_id.gid); case PRJQUOTA: return 1; } return 0; } /* Print warning to user which exceeded quota */ static void print_warning(struct dquot_warn *warn) { char *msg = NULL; struct tty_struct *tty; int warntype = warn->w_type; if (warntype == QUOTA_NL_IHARDBELOW || warntype == QUOTA_NL_ISOFTBELOW || warntype == QUOTA_NL_BHARDBELOW || warntype == QUOTA_NL_BSOFTBELOW || !need_print_warning(warn)) return; tty = get_current_tty(); if (!tty) return; tty_write_message(tty, warn->w_sb->s_id); if (warntype == QUOTA_NL_ISOFTWARN || warntype == QUOTA_NL_BSOFTWARN) tty_write_message(tty, ": warning, "); else tty_write_message(tty, ": write failed, "); tty_write_message(tty, quotatypes[warn->w_dq_id.type]); switch (warntype) { case QUOTA_NL_IHARDWARN: msg = " file limit reached.\r\n"; break; case QUOTA_NL_ISOFTLONGWARN: msg = " file quota exceeded too long.\r\n"; break; case QUOTA_NL_ISOFTWARN: msg = " file quota exceeded.\r\n"; break; case QUOTA_NL_BHARDWARN: msg = " block limit reached.\r\n"; break; case QUOTA_NL_BSOFTLONGWARN: msg = " block quota exceeded too long.\r\n"; break; case QUOTA_NL_BSOFTWARN: msg = " block quota exceeded.\r\n"; break; } tty_write_message(tty, msg); tty_kref_put(tty); } #endif static void prepare_warning(struct dquot_warn *warn, struct dquot *dquot, int warntype) { if (warning_issued(dquot, warntype)) return; warn->w_type = warntype; warn->w_sb = dquot->dq_sb; warn->w_dq_id = dquot->dq_id; } /* * Write warnings to the console and send warning messages over netlink. * * Note that this function can call into tty and networking code. */ static void flush_warnings(struct dquot_warn *warn) { int i; for (i = 0; i < MAXQUOTAS; i++) { if (warn[i].w_type == QUOTA_NL_NOWARN) continue; #ifdef CONFIG_PRINT_QUOTA_WARNING print_warning(&warn[i]); #endif quota_send_warning(warn[i].w_dq_id, warn[i].w_sb->s_dev, warn[i].w_type); } } static int ignore_hardlimit(struct dquot *dquot) { struct mem_dqinfo *info = &sb_dqopt(dquot->dq_sb)->info[dquot->dq_id.type]; return capable(CAP_SYS_RESOURCE) && (info->dqi_format->qf_fmt_id != QFMT_VFS_OLD || !(info->dqi_flags & DQF_ROOT_SQUASH)); } static int dquot_add_inodes(struct dquot *dquot, qsize_t inodes, struct dquot_warn *warn) { qsize_t newinodes; int ret = 0; spin_lock(&dquot->dq_dqb_lock); newinodes = dquot->dq_dqb.dqb_curinodes + inodes; if (!sb_has_quota_limits_enabled(dquot->dq_sb, dquot->dq_id.type) || test_bit(DQ_FAKE_B, &dquot->dq_flags)) goto add; if (dquot->dq_dqb.dqb_ihardlimit && newinodes > dquot->dq_dqb.dqb_ihardlimit && !ignore_hardlimit(dquot)) { prepare_warning(warn, dquot, QUOTA_NL_IHARDWARN); ret = -EDQUOT; goto out; } if (dquot->dq_dqb.dqb_isoftlimit && newinodes > dquot->dq_dqb.dqb_isoftlimit && dquot->dq_dqb.dqb_itime && ktime_get_real_seconds() >= dquot->dq_dqb.dqb_itime && !ignore_hardlimit(dquot)) { prepare_warning(warn, dquot, QUOTA_NL_ISOFTLONGWARN); ret = -EDQUOT; goto out; } if (dquot->dq_dqb.dqb_isoftlimit && newinodes > dquot->dq_dqb.dqb_isoftlimit && dquot->dq_dqb.dqb_itime == 0) { prepare_warning(warn, dquot, QUOTA_NL_ISOFTWARN); dquot->dq_dqb.dqb_itime = ktime_get_real_seconds() + sb_dqopt(dquot->dq_sb)->info[dquot->dq_id.type].dqi_igrace; } add: dquot->dq_dqb.dqb_curinodes = newinodes; out: spin_unlock(&dquot->dq_dqb_lock); return ret; } static int dquot_add_space(struct dquot *dquot, qsize_t space, qsize_t rsv_space, unsigned int flags, struct dquot_warn *warn) { qsize_t tspace; struct super_block *sb = dquot->dq_sb; int ret = 0; spin_lock(&dquot->dq_dqb_lock); if (!sb_has_quota_limits_enabled(sb, dquot->dq_id.type) || test_bit(DQ_FAKE_B, &dquot->dq_flags)) goto finish; tspace = dquot->dq_dqb.dqb_curspace + dquot->dq_dqb.dqb_rsvspace + space + rsv_space; if (dquot->dq_dqb.dqb_bhardlimit && tspace > dquot->dq_dqb.dqb_bhardlimit && !ignore_hardlimit(dquot)) { if (flags & DQUOT_SPACE_WARN) prepare_warning(warn, dquot, QUOTA_NL_BHARDWARN); ret = -EDQUOT; goto finish; } if (dquot->dq_dqb.dqb_bsoftlimit && tspace > dquot->dq_dqb.dqb_bsoftlimit && dquot->dq_dqb.dqb_btime && ktime_get_real_seconds() >= dquot->dq_dqb.dqb_btime && !ignore_hardlimit(dquot)) { if (flags & DQUOT_SPACE_WARN) prepare_warning(warn, dquot, QUOTA_NL_BSOFTLONGWARN); ret = -EDQUOT; goto finish; } if (dquot->dq_dqb.dqb_bsoftlimit && tspace > dquot->dq_dqb.dqb_bsoftlimit && dquot->dq_dqb.dqb_btime == 0) { if (flags & DQUOT_SPACE_WARN) { prepare_warning(warn, dquot, QUOTA_NL_BSOFTWARN); dquot->dq_dqb.dqb_btime = ktime_get_real_seconds() + sb_dqopt(sb)->info[dquot->dq_id.type].dqi_bgrace; } else { /* * We don't allow preallocation to exceed softlimit so exceeding will * be always printed */ ret = -EDQUOT; goto finish; } } finish: /* * We have to be careful and go through warning generation & grace time * setting even if DQUOT_SPACE_NOFAIL is set. That's why we check it * only here... */ if (flags & DQUOT_SPACE_NOFAIL) ret = 0; if (!ret) { dquot->dq_dqb.dqb_rsvspace += rsv_space; dquot->dq_dqb.dqb_curspace += space; } spin_unlock(&dquot->dq_dqb_lock); return ret; } static int info_idq_free(struct dquot *dquot, qsize_t inodes) { qsize_t newinodes; if (test_bit(DQ_FAKE_B, &dquot->dq_flags) || dquot->dq_dqb.dqb_curinodes <= dquot->dq_dqb.dqb_isoftlimit || !sb_has_quota_limits_enabled(dquot->dq_sb, dquot->dq_id.type)) return QUOTA_NL_NOWARN; newinodes = dquot->dq_dqb.dqb_curinodes - inodes; if (newinodes <= dquot->dq_dqb.dqb_isoftlimit) return QUOTA_NL_ISOFTBELOW; if (dquot->dq_dqb.dqb_curinodes >= dquot->dq_dqb.dqb_ihardlimit && newinodes < dquot->dq_dqb.dqb_ihardlimit) return QUOTA_NL_IHARDBELOW; return QUOTA_NL_NOWARN; } static int info_bdq_free(struct dquot *dquot, qsize_t space) { qsize_t tspace; tspace = dquot->dq_dqb.dqb_curspace + dquot->dq_dqb.dqb_rsvspace; if (test_bit(DQ_FAKE_B, &dquot->dq_flags) || tspace <= dquot->dq_dqb.dqb_bsoftlimit) return QUOTA_NL_NOWARN; if (tspace - space <= dquot->dq_dqb.dqb_bsoftlimit) return QUOTA_NL_BSOFTBELOW; if (tspace >= dquot->dq_dqb.dqb_bhardlimit && tspace - space < dquot->dq_dqb.dqb_bhardlimit) return QUOTA_NL_BHARDBELOW; return QUOTA_NL_NOWARN; } static int inode_quota_active(const struct inode *inode) { struct super_block *sb = inode->i_sb; if (IS_NOQUOTA(inode)) return 0; return sb_any_quota_loaded(sb) & ~sb_any_quota_suspended(sb); } /* * Initialize quota pointers in inode * * It is better to call this function outside of any transaction as it * might need a lot of space in journal for dquot structure allocation. */ static int __dquot_initialize(struct inode *inode, int type) { int cnt, init_needed = 0; struct dquot __rcu **dquots; struct dquot *got[MAXQUOTAS] = {}; struct super_block *sb = inode->i_sb; qsize_t rsv; int ret = 0; if (!inode_quota_active(inode)) return 0; dquots = i_dquot(inode); /* First get references to structures we might need. */ for (cnt = 0; cnt < MAXQUOTAS; cnt++) { struct kqid qid; kprojid_t projid; int rc; struct dquot *dquot; if (type != -1 && cnt != type) continue; /* * The i_dquot should have been initialized in most cases, * we check it without locking here to avoid unnecessary * dqget()/dqput() calls. */ if (dquots[cnt]) continue; if (!sb_has_quota_active(sb, cnt)) continue; init_needed = 1; switch (cnt) { case USRQUOTA: qid = make_kqid_uid(inode->i_uid); break; case GRPQUOTA: qid = make_kqid_gid(inode->i_gid); break; case PRJQUOTA: rc = inode->i_sb->dq_op->get_projid(inode, &projid); if (rc) continue; qid = make_kqid_projid(projid); break; } dquot = dqget(sb, qid); if (IS_ERR(dquot)) { /* We raced with somebody turning quotas off... */ if (PTR_ERR(dquot) != -ESRCH) { ret = PTR_ERR(dquot); goto out_put; } dquot = NULL; } got[cnt] = dquot; } /* All required i_dquot has been initialized */ if (!init_needed) return 0; spin_lock(&dq_data_lock); if (IS_NOQUOTA(inode)) goto out_lock; for (cnt = 0; cnt < MAXQUOTAS; cnt++) { if (type != -1 && cnt != type) continue; /* Avoid races with quotaoff() */ if (!sb_has_quota_active(sb, cnt)) continue; /* We could race with quotaon or dqget() could have failed */ if (!got[cnt]) continue; if (!dquots[cnt]) { rcu_assign_pointer(dquots[cnt], got[cnt]); got[cnt] = NULL; /* * Make quota reservation system happy if someone * did a write before quota was turned on */ rsv = inode_get_rsv_space(inode); if (unlikely(rsv)) { struct dquot *dquot = srcu_dereference_check( dquots[cnt], &dquot_srcu, lockdep_is_held(&dq_data_lock)); spin_lock(&inode->i_lock); /* Get reservation again under proper lock */ rsv = __inode_get_rsv_space(inode); spin_lock(&dquot->dq_dqb_lock); dquot->dq_dqb.dqb_rsvspace += rsv; spin_unlock(&dquot->dq_dqb_lock); spin_unlock(&inode->i_lock); } } } out_lock: spin_unlock(&dq_data_lock); out_put: /* Drop unused references */ dqput_all(got); return ret; } int dquot_initialize(struct inode *inode) { return __dquot_initialize(inode, -1); } EXPORT_SYMBOL(dquot_initialize); bool dquot_initialize_needed(struct inode *inode) { struct dquot __rcu **dquots; int i; if (!inode_quota_active(inode)) return false; dquots = i_dquot(inode); for (i = 0; i < MAXQUOTAS; i++) if (!dquots[i] && sb_has_quota_active(inode->i_sb, i)) return true; return false; } EXPORT_SYMBOL(dquot_initialize_needed); /* * Release all quotas referenced by inode. * * This function only be called on inode free or converting * a file to quota file, no other users for the i_dquot in * both cases, so we needn't call synchronize_srcu() after * clearing i_dquot. */ static void __dquot_drop(struct inode *inode) { int cnt; struct dquot __rcu **dquots = i_dquot(inode); struct dquot *put[MAXQUOTAS]; spin_lock(&dq_data_lock); for (cnt = 0; cnt < MAXQUOTAS; cnt++) { put[cnt] = srcu_dereference_check(dquots[cnt], &dquot_srcu, lockdep_is_held(&dq_data_lock)); rcu_assign_pointer(dquots[cnt], NULL); } spin_unlock(&dq_data_lock); dqput_all(put); } void dquot_drop(struct inode *inode) { struct dquot __rcu * const *dquots; int cnt; if (IS_NOQUOTA(inode)) return; /* * Test before calling to rule out calls from proc and such * where we are not allowed to block. Note that this is * actually reliable test even without the lock - the caller * must assure that nobody can come after the DQUOT_DROP and * add quota pointers back anyway. */ dquots = i_dquot(inode); for (cnt = 0; cnt < MAXQUOTAS; cnt++) { if (dquots[cnt]) break; } if (cnt < MAXQUOTAS) __dquot_drop(inode); } EXPORT_SYMBOL(dquot_drop); /* * inode_reserved_space is managed internally by quota, and protected by * i_lock similar to i_blocks+i_bytes. */ static qsize_t *inode_reserved_space(struct inode * inode) { /* Filesystem must explicitly define it's own method in order to use * quota reservation interface */ BUG_ON(!inode->i_sb->dq_op->get_reserved_space); return inode->i_sb->dq_op->get_reserved_space(inode); } static qsize_t __inode_get_rsv_space(struct inode *inode) { if (!inode->i_sb->dq_op->get_reserved_space) return 0; return *inode_reserved_space(inode); } static qsize_t inode_get_rsv_space(struct inode *inode) { qsize_t ret; if (!inode->i_sb->dq_op->get_reserved_space) return 0; spin_lock(&inode->i_lock); ret = __inode_get_rsv_space(inode); spin_unlock(&inode->i_lock); return ret; } /* * This functions updates i_blocks+i_bytes fields and quota information * (together with appropriate checks). * * NOTE: We absolutely rely on the fact that caller dirties the inode * (usually helpers in quotaops.h care about this) and holds a handle for * the current transaction so that dquot write and inode write go into the * same transaction. */ /* * This operation can block, but only after everything is updated */ int __dquot_alloc_space(struct inode *inode, qsize_t number, int flags) { int cnt, ret = 0, index; struct dquot_warn warn[MAXQUOTAS]; int reserve = flags & DQUOT_SPACE_RESERVE; struct dquot __rcu **dquots; struct dquot *dquot; if (!inode_quota_active(inode)) { if (reserve) { spin_lock(&inode->i_lock); *inode_reserved_space(inode) += number; spin_unlock(&inode->i_lock); } else { inode_add_bytes(inode, number); } goto out; } for (cnt = 0; cnt < MAXQUOTAS; cnt++) warn[cnt].w_type = QUOTA_NL_NOWARN; dquots = i_dquot(inode); index = srcu_read_lock(&dquot_srcu); spin_lock(&inode->i_lock); for (cnt = 0; cnt < MAXQUOTAS; cnt++) { dquot = srcu_dereference(dquots[cnt], &dquot_srcu); if (!dquot) continue; if (reserve) { ret = dquot_add_space(dquot, 0, number, flags, &warn[cnt]); } else { ret = dquot_add_space(dquot, number, 0, flags, &warn[cnt]); } if (ret) { /* Back out changes we already did */ for (cnt--; cnt >= 0; cnt--) { dquot = srcu_dereference(dquots[cnt], &dquot_srcu); if (!dquot) continue; spin_lock(&dquot->dq_dqb_lock); if (reserve) dquot_free_reserved_space(dquot, number); else dquot_decr_space(dquot, number); spin_unlock(&dquot->dq_dqb_lock); } spin_unlock(&inode->i_lock); goto out_flush_warn; } } if (reserve) *inode_reserved_space(inode) += number; else __inode_add_bytes(inode, number); spin_unlock(&inode->i_lock); if (reserve) goto out_flush_warn; ret = mark_all_dquot_dirty(dquots); out_flush_warn: srcu_read_unlock(&dquot_srcu, index); flush_warnings(warn); out: return ret; } EXPORT_SYMBOL(__dquot_alloc_space); /* * This operation can block, but only after everything is updated */ int dquot_alloc_inode(struct inode *inode) { int cnt, ret = 0, index; struct dquot_warn warn[MAXQUOTAS]; struct dquot __rcu * const *dquots; struct dquot *dquot; if (!inode_quota_active(inode)) return 0; for (cnt = 0; cnt < MAXQUOTAS; cnt++) warn[cnt].w_type = QUOTA_NL_NOWARN; dquots = i_dquot(inode); index = srcu_read_lock(&dquot_srcu); spin_lock(&inode->i_lock); for (cnt = 0; cnt < MAXQUOTAS; cnt++) { dquot = srcu_dereference(dquots[cnt], &dquot_srcu); if (!dquot) continue; ret = dquot_add_inodes(dquot, 1, &warn[cnt]); if (ret) { for (cnt--; cnt >= 0; cnt--) { dquot = srcu_dereference(dquots[cnt], &dquot_srcu); if (!dquot) continue; /* Back out changes we already did */ spin_lock(&dquot->dq_dqb_lock); dquot_decr_inodes(dquot, 1); spin_unlock(&dquot->dq_dqb_lock); } goto warn_put_all; } } warn_put_all: spin_unlock(&inode->i_lock); if (ret == 0) ret = mark_all_dquot_dirty(dquots); srcu_read_unlock(&dquot_srcu, index); flush_warnings(warn); return ret; } EXPORT_SYMBOL(dquot_alloc_inode); /* * Convert in-memory reserved quotas to real consumed quotas */ void dquot_claim_space_nodirty(struct inode *inode, qsize_t number) { struct dquot __rcu **dquots; struct dquot *dquot; int cnt, index; if (!inode_quota_active(inode)) { spin_lock(&inode->i_lock); *inode_reserved_space(inode) -= number; __inode_add_bytes(inode, number); spin_unlock(&inode->i_lock); return; } dquots = i_dquot(inode); index = srcu_read_lock(&dquot_srcu); spin_lock(&inode->i_lock); /* Claim reserved quotas to allocated quotas */ for (cnt = 0; cnt < MAXQUOTAS; cnt++) { dquot = srcu_dereference(dquots[cnt], &dquot_srcu); if (dquot) { spin_lock(&dquot->dq_dqb_lock); if (WARN_ON_ONCE(dquot->dq_dqb.dqb_rsvspace < number)) number = dquot->dq_dqb.dqb_rsvspace; dquot->dq_dqb.dqb_curspace += number; dquot->dq_dqb.dqb_rsvspace -= number; spin_unlock(&dquot->dq_dqb_lock); } } /* Update inode bytes */ *inode_reserved_space(inode) -= number; __inode_add_bytes(inode, number); spin_unlock(&inode->i_lock); mark_all_dquot_dirty(dquots); srcu_read_unlock(&dquot_srcu, index); } EXPORT_SYMBOL(dquot_claim_space_nodirty); /* * Convert allocated space back to in-memory reserved quotas */ void dquot_reclaim_space_nodirty(struct inode *inode, qsize_t number) { struct dquot __rcu **dquots; struct dquot *dquot; int cnt, index; if (!inode_quota_active(inode)) { spin_lock(&inode->i_lock); *inode_reserved_space(inode) += number; __inode_sub_bytes(inode, number); spin_unlock(&inode->i_lock); return; } dquots = i_dquot(inode); index = srcu_read_lock(&dquot_srcu); spin_lock(&inode->i_lock); /* Claim reserved quotas to allocated quotas */ for (cnt = 0; cnt < MAXQUOTAS; cnt++) { dquot = srcu_dereference(dquots[cnt], &dquot_srcu); if (dquot) { spin_lock(&dquot->dq_dqb_lock); if (WARN_ON_ONCE(dquot->dq_dqb.dqb_curspace < number)) number = dquot->dq_dqb.dqb_curspace; dquot->dq_dqb.dqb_rsvspace += number; dquot->dq_dqb.dqb_curspace -= number; spin_unlock(&dquot->dq_dqb_lock); } } /* Update inode bytes */ *inode_reserved_space(inode) += number; __inode_sub_bytes(inode, number); spin_unlock(&inode->i_lock); mark_all_dquot_dirty(dquots); srcu_read_unlock(&dquot_srcu, index); } EXPORT_SYMBOL(dquot_reclaim_space_nodirty); /* * This operation can block, but only after everything is updated */ void __dquot_free_space(struct inode *inode, qsize_t number, int flags) { unsigned int cnt; struct dquot_warn warn[MAXQUOTAS]; struct dquot __rcu **dquots; struct dquot *dquot; int reserve = flags & DQUOT_SPACE_RESERVE, index; if (!inode_quota_active(inode)) { if (reserve) { spin_lock(&inode->i_lock); *inode_reserved_space(inode) -= number; spin_unlock(&inode->i_lock); } else { inode_sub_bytes(inode, number); } return; } dquots = i_dquot(inode); index = srcu_read_lock(&dquot_srcu); spin_lock(&inode->i_lock); for (cnt = 0; cnt < MAXQUOTAS; cnt++) { int wtype; warn[cnt].w_type = QUOTA_NL_NOWARN; dquot = srcu_dereference(dquots[cnt], &dquot_srcu); if (!dquot) continue; spin_lock(&dquot->dq_dqb_lock); wtype = info_bdq_free(dquot, number); if (wtype != QUOTA_NL_NOWARN) prepare_warning(&warn[cnt], dquot, wtype); if (reserve) dquot_free_reserved_space(dquot, number); else dquot_decr_space(dquot, number); spin_unlock(&dquot->dq_dqb_lock); } if (reserve) *inode_reserved_space(inode) -= number; else __inode_sub_bytes(inode, number); spin_unlock(&inode->i_lock); if (reserve) goto out_unlock; mark_all_dquot_dirty(dquots); out_unlock: srcu_read_unlock(&dquot_srcu, index); flush_warnings(warn); } EXPORT_SYMBOL(__dquot_free_space); /* * This operation can block, but only after everything is updated */ void dquot_free_inode(struct inode *inode) { unsigned int cnt; struct dquot_warn warn[MAXQUOTAS]; struct dquot __rcu * const *dquots; struct dquot *dquot; int index; if (!inode_quota_active(inode)) return; dquots = i_dquot(inode); index = srcu_read_lock(&dquot_srcu); spin_lock(&inode->i_lock); for (cnt = 0; cnt < MAXQUOTAS; cnt++) { int wtype; warn[cnt].w_type = QUOTA_NL_NOWARN; dquot = srcu_dereference(dquots[cnt], &dquot_srcu); if (!dquot) continue; spin_lock(&dquot->dq_dqb_lock); wtype = info_idq_free(dquot, 1); if (wtype != QUOTA_NL_NOWARN) prepare_warning(&warn[cnt], dquot, wtype); dquot_decr_inodes(dquot, 1); spin_unlock(&dquot->dq_dqb_lock); } spin_unlock(&inode->i_lock); mark_all_dquot_dirty(dquots); srcu_read_unlock(&dquot_srcu, index); flush_warnings(warn); } EXPORT_SYMBOL(dquot_free_inode); /* * Transfer the number of inode and blocks from one diskquota to an other. * On success, dquot references in transfer_to are consumed and references * to original dquots that need to be released are placed there. On failure, * references are kept untouched. * * This operation can block, but only after everything is updated * A transaction must be started when entering this function. * * We are holding reference on transfer_from & transfer_to, no need to * protect them by srcu_read_lock(). */ int __dquot_transfer(struct inode *inode, struct dquot **transfer_to) { qsize_t cur_space; qsize_t rsv_space = 0; qsize_t inode_usage = 1; struct dquot __rcu **dquots; struct dquot *transfer_from[MAXQUOTAS] = {}; int cnt, index, ret = 0, err; char is_valid[MAXQUOTAS] = {}; struct dquot_warn warn_to[MAXQUOTAS]; struct dquot_warn warn_from_inodes[MAXQUOTAS]; struct dquot_warn warn_from_space[MAXQUOTAS]; if (IS_NOQUOTA(inode)) return 0; if (inode->i_sb->dq_op->get_inode_usage) { ret = inode->i_sb->dq_op->get_inode_usage(inode, &inode_usage); if (ret) return ret; } /* Initialize the arrays */ for (cnt = 0; cnt < MAXQUOTAS; cnt++) { warn_to[cnt].w_type = QUOTA_NL_NOWARN; warn_from_inodes[cnt].w_type = QUOTA_NL_NOWARN; warn_from_space[cnt].w_type = QUOTA_NL_NOWARN; } spin_lock(&dq_data_lock); spin_lock(&inode->i_lock); if (IS_NOQUOTA(inode)) { /* File without quota accounting? */ spin_unlock(&inode->i_lock); spin_unlock(&dq_data_lock); return 0; } cur_space = __inode_get_bytes(inode); rsv_space = __inode_get_rsv_space(inode); dquots = i_dquot(inode); /* * Build the transfer_from list, check limits, and update usage in * the target structures. */ for (cnt = 0; cnt < MAXQUOTAS; cnt++) { /* * Skip changes for same uid or gid or for turned off quota-type. */ if (!transfer_to[cnt]) continue; /* Avoid races with quotaoff() */ if (!sb_has_quota_active(inode->i_sb, cnt)) continue; is_valid[cnt] = 1; transfer_from[cnt] = srcu_dereference_check(dquots[cnt], &dquot_srcu, lockdep_is_held(&dq_data_lock)); ret = dquot_add_inodes(transfer_to[cnt], inode_usage, &warn_to[cnt]); if (ret) goto over_quota; ret = dquot_add_space(transfer_to[cnt], cur_space, rsv_space, DQUOT_SPACE_WARN, &warn_to[cnt]); if (ret) { spin_lock(&transfer_to[cnt]->dq_dqb_lock); dquot_decr_inodes(transfer_to[cnt], inode_usage); spin_unlock(&transfer_to[cnt]->dq_dqb_lock); goto over_quota; } } /* Decrease usage for source structures and update quota pointers */ for (cnt = 0; cnt < MAXQUOTAS; cnt++) { if (!is_valid[cnt]) continue; /* Due to IO error we might not have transfer_from[] structure */ if (transfer_from[cnt]) { int wtype; spin_lock(&transfer_from[cnt]->dq_dqb_lock); wtype = info_idq_free(transfer_from[cnt], inode_usage); if (wtype != QUOTA_NL_NOWARN) prepare_warning(&warn_from_inodes[cnt], transfer_from[cnt], wtype); wtype = info_bdq_free(transfer_from[cnt], cur_space + rsv_space); if (wtype != QUOTA_NL_NOWARN) prepare_warning(&warn_from_space[cnt], transfer_from[cnt], wtype); dquot_decr_inodes(transfer_from[cnt], inode_usage); dquot_decr_space(transfer_from[cnt], cur_space); dquot_free_reserved_space(transfer_from[cnt], rsv_space); spin_unlock(&transfer_from[cnt]->dq_dqb_lock); } rcu_assign_pointer(dquots[cnt], transfer_to[cnt]); } spin_unlock(&inode->i_lock); spin_unlock(&dq_data_lock); /* * These arrays are local and we hold dquot references so we don't need * the srcu protection but still take dquot_srcu to avoid warning in * mark_all_dquot_dirty(). */ index = srcu_read_lock(&dquot_srcu); err = mark_all_dquot_dirty((struct dquot __rcu **)transfer_from); if (err < 0) ret = err; err = mark_all_dquot_dirty((struct dquot __rcu **)transfer_to); if (err < 0) ret = err; srcu_read_unlock(&dquot_srcu, index); flush_warnings(warn_to); flush_warnings(warn_from_inodes); flush_warnings(warn_from_space); /* Pass back references to put */ for (cnt = 0; cnt < MAXQUOTAS; cnt++) if (is_valid[cnt]) transfer_to[cnt] = transfer_from[cnt]; return ret; over_quota: /* Back out changes we already did */ for (cnt--; cnt >= 0; cnt--) { if (!is_valid[cnt]) continue; spin_lock(&transfer_to[cnt]->dq_dqb_lock); dquot_decr_inodes(transfer_to[cnt], inode_usage); dquot_decr_space(transfer_to[cnt], cur_space); dquot_free_reserved_space(transfer_to[cnt], rsv_space); spin_unlock(&transfer_to[cnt]->dq_dqb_lock); } spin_unlock(&inode->i_lock); spin_unlock(&dq_data_lock); flush_warnings(warn_to); return ret; } EXPORT_SYMBOL(__dquot_transfer); /* Wrapper for transferring ownership of an inode for uid/gid only * Called from FSXXX_setattr() */ int dquot_transfer(struct mnt_idmap *idmap, struct inode *inode, struct iattr *iattr) { struct dquot *transfer_to[MAXQUOTAS] = {}; struct dquot *dquot; struct super_block *sb = inode->i_sb; int ret; if (!inode_quota_active(inode)) return 0; if (i_uid_needs_update(idmap, iattr, inode)) { kuid_t kuid = from_vfsuid(idmap, i_user_ns(inode), iattr->ia_vfsuid); dquot = dqget(sb, make_kqid_uid(kuid)); if (IS_ERR(dquot)) { if (PTR_ERR(dquot) != -ESRCH) { ret = PTR_ERR(dquot); goto out_put; } dquot = NULL; } transfer_to[USRQUOTA] = dquot; } if (i_gid_needs_update(idmap, iattr, inode)) { kgid_t kgid = from_vfsgid(idmap, i_user_ns(inode), iattr->ia_vfsgid); dquot = dqget(sb, make_kqid_gid(kgid)); if (IS_ERR(dquot)) { if (PTR_ERR(dquot) != -ESRCH) { ret = PTR_ERR(dquot); goto out_put; } dquot = NULL; } transfer_to[GRPQUOTA] = dquot; } ret = __dquot_transfer(inode, transfer_to); out_put: dqput_all(transfer_to); return ret; } EXPORT_SYMBOL(dquot_transfer); /* * Write info of quota file to disk */ int dquot_commit_info(struct super_block *sb, int type) { struct quota_info *dqopt = sb_dqopt(sb); return dqopt->ops[type]->write_file_info(sb, type); } EXPORT_SYMBOL(dquot_commit_info); int dquot_get_next_id(struct super_block *sb, struct kqid *qid) { struct quota_info *dqopt = sb_dqopt(sb); if (!sb_has_quota_active(sb, qid->type)) return -ESRCH; if (!dqopt->ops[qid->type]->get_next_id) return -ENOSYS; return dqopt->ops[qid->type]->get_next_id(sb, qid); } EXPORT_SYMBOL(dquot_get_next_id); /* * Definitions of diskquota operations. */ const struct dquot_operations dquot_operations = { .write_dquot = dquot_commit, .acquire_dquot = dquot_acquire, .release_dquot = dquot_release, .mark_dirty = dquot_mark_dquot_dirty, .write_info = dquot_commit_info, .alloc_dquot = dquot_alloc, .destroy_dquot = dquot_destroy, .get_next_id = dquot_get_next_id, }; EXPORT_SYMBOL(dquot_operations); /* * Generic helper for ->open on filesystems supporting disk quotas. */ int dquot_file_open(struct inode *inode, struct file *file) { int error; error = generic_file_open(inode, file); if (!error && (file->f_mode & FMODE_WRITE)) error = dquot_initialize(inode); return error; } EXPORT_SYMBOL(dquot_file_open); static void vfs_cleanup_quota_inode(struct super_block *sb, int type) { struct quota_info *dqopt = sb_dqopt(sb); struct inode *inode = dqopt->files[type]; if (!inode) return; if (!(dqopt->flags & DQUOT_QUOTA_SYS_FILE)) { inode_lock(inode); inode->i_flags &= ~S_NOQUOTA; inode_unlock(inode); } dqopt->files[type] = NULL; iput(inode); } /* * Turn quota off on a device. type == -1 ==> quotaoff for all types (umount) */ int dquot_disable(struct super_block *sb, int type, unsigned int flags) { int cnt; struct quota_info *dqopt = sb_dqopt(sb); rwsem_assert_held_write(&sb->s_umount); /* Cannot turn off usage accounting without turning off limits, or * suspend quotas and simultaneously turn quotas off. */ if ((flags & DQUOT_USAGE_ENABLED && !(flags & DQUOT_LIMITS_ENABLED)) || (flags & DQUOT_SUSPENDED && flags & (DQUOT_LIMITS_ENABLED | DQUOT_USAGE_ENABLED))) return -EINVAL; /* * Skip everything if there's nothing to do. We have to do this because * sometimes we are called when fill_super() failed and calling * sync_fs() in such cases does no good. */ if (!sb_any_quota_loaded(sb)) return 0; for (cnt = 0; cnt < MAXQUOTAS; cnt++) { if (type != -1 && cnt != type) continue; if (!sb_has_quota_loaded(sb, cnt)) continue; if (flags & DQUOT_SUSPENDED) { spin_lock(&dq_state_lock); dqopt->flags |= dquot_state_flag(DQUOT_SUSPENDED, cnt); spin_unlock(&dq_state_lock); } else { spin_lock(&dq_state_lock); dqopt->flags &= ~dquot_state_flag(flags, cnt); /* Turning off suspended quotas? */ if (!sb_has_quota_loaded(sb, cnt) && sb_has_quota_suspended(sb, cnt)) { dqopt->flags &= ~dquot_state_flag( DQUOT_SUSPENDED, cnt); spin_unlock(&dq_state_lock); vfs_cleanup_quota_inode(sb, cnt); continue; } spin_unlock(&dq_state_lock); } /* We still have to keep quota loaded? */ if (sb_has_quota_loaded(sb, cnt) && !(flags & DQUOT_SUSPENDED)) continue; /* Note: these are blocking operations */ drop_dquot_ref(sb, cnt); invalidate_dquots(sb, cnt); /* * Now all dquots should be invalidated, all writes done so we * should be only users of the info. No locks needed. */ if (info_dirty(&dqopt->info[cnt])) sb->dq_op->write_info(sb, cnt); if (dqopt->ops[cnt]->free_file_info) dqopt->ops[cnt]->free_file_info(sb, cnt); put_quota_format(dqopt->info[cnt].dqi_format); dqopt->info[cnt].dqi_flags = 0; dqopt->info[cnt].dqi_igrace = 0; dqopt->info[cnt].dqi_bgrace = 0; dqopt->ops[cnt] = NULL; } /* Skip syncing and setting flags if quota files are hidden */ if (dqopt->flags & DQUOT_QUOTA_SYS_FILE) goto put_inodes; /* Sync the superblock so that buffers with quota data are written to * disk (and so userspace sees correct data afterwards). */ if (sb->s_op->sync_fs) sb->s_op->sync_fs(sb, 1); sync_blockdev(sb->s_bdev); /* Now the quota files are just ordinary files and we can set the * inode flags back. Moreover we discard the pagecache so that * userspace sees the writes we did bypassing the pagecache. We * must also discard the blockdev buffers so that we see the * changes done by userspace on the next quotaon() */ for (cnt = 0; cnt < MAXQUOTAS; cnt++) if (!sb_has_quota_loaded(sb, cnt) && dqopt->files[cnt]) { inode_lock(dqopt->files[cnt]); truncate_inode_pages(&dqopt->files[cnt]->i_data, 0); inode_unlock(dqopt->files[cnt]); } if (sb->s_bdev) invalidate_bdev(sb->s_bdev); put_inodes: /* We are done when suspending quotas */ if (flags & DQUOT_SUSPENDED) return 0; for (cnt = 0; cnt < MAXQUOTAS; cnt++) if (!sb_has_quota_loaded(sb, cnt)) vfs_cleanup_quota_inode(sb, cnt); return 0; } EXPORT_SYMBOL(dquot_disable); int dquot_quota_off(struct super_block *sb, int type) { return dquot_disable(sb, type, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); } EXPORT_SYMBOL(dquot_quota_off); /* * Turn quotas on on a device */ static int vfs_setup_quota_inode(struct inode *inode, int type) { struct super_block *sb = inode->i_sb; struct quota_info *dqopt = sb_dqopt(sb); if (is_bad_inode(inode)) return -EUCLEAN; if (!S_ISREG(inode->i_mode)) return -EACCES; if (IS_RDONLY(inode)) return -EROFS; if (sb_has_quota_loaded(sb, type)) return -EBUSY; /* * Quota files should never be encrypted. They should be thought of as * filesystem metadata, not user data. New-style internal quota files * cannot be encrypted by users anyway, but old-style external quota * files could potentially be incorrectly created in an encrypted * directory, hence this explicit check. Some reasons why encrypted * quota files don't work include: (1) some filesystems that support * encryption don't handle it in their quota_read and quota_write, and * (2) cleaning up encrypted quota files at unmount would need special * consideration, as quota files are cleaned up later than user files. */ if (IS_ENCRYPTED(inode)) return -EINVAL; dqopt->files[type] = igrab(inode); if (!dqopt->files[type]) return -EIO; if (!(dqopt->flags & DQUOT_QUOTA_SYS_FILE)) { /* We don't want quota and atime on quota files (deadlocks * possible) Also nobody should write to the file - we use * special IO operations which ignore the immutable bit. */ inode_lock(inode); inode->i_flags |= S_NOQUOTA; inode_unlock(inode); /* * When S_NOQUOTA is set, remove dquot references as no more * references can be added */ __dquot_drop(inode); } return 0; } int dquot_load_quota_sb(struct super_block *sb, int type, int format_id, unsigned int flags) { struct quota_format_type *fmt; struct quota_info *dqopt = sb_dqopt(sb); int error; lockdep_assert_held_write(&sb->s_umount); /* Just unsuspend quotas? */ if (WARN_ON_ONCE(flags & DQUOT_SUSPENDED)) return -EINVAL; fmt = find_quota_format(format_id); if (!fmt) return -ESRCH; if (!sb->dq_op || !sb->s_qcop || (type == PRJQUOTA && sb->dq_op->get_projid == NULL)) { error = -EINVAL; goto out_fmt; } /* Filesystems outside of init_user_ns not yet supported */ if (sb->s_user_ns != &init_user_ns) { error = -EINVAL; goto out_fmt; } /* Usage always has to be set... */ if (!(flags & DQUOT_USAGE_ENABLED)) { error = -EINVAL; goto out_fmt; } if (sb_has_quota_loaded(sb, type)) { error = -EBUSY; goto out_fmt; } if (!(dqopt->flags & DQUOT_QUOTA_SYS_FILE)) { /* As we bypass the pagecache we must now flush all the * dirty data and invalidate caches so that kernel sees * changes from userspace. It is not enough to just flush * the quota file since if blocksize < pagesize, invalidation * of the cache could fail because of other unrelated dirty * data */ sync_filesystem(sb); invalidate_bdev(sb->s_bdev); } error = -EINVAL; if (!fmt->qf_ops->check_quota_file(sb, type)) goto out_fmt; dqopt->ops[type] = fmt->qf_ops; dqopt->info[type].dqi_format = fmt; dqopt->info[type].dqi_fmt_id = format_id; INIT_LIST_HEAD(&dqopt->info[type].dqi_dirty_list); error = dqopt->ops[type]->read_file_info(sb, type); if (error < 0) goto out_fmt; if (dqopt->flags & DQUOT_QUOTA_SYS_FILE) { spin_lock(&dq_data_lock); dqopt->info[type].dqi_flags |= DQF_SYS_FILE; spin_unlock(&dq_data_lock); } spin_lock(&dq_state_lock); dqopt->flags |= dquot_state_flag(flags, type); spin_unlock(&dq_state_lock); error = add_dquot_ref(sb, type); if (error) dquot_disable(sb, type, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); return error; out_fmt: put_quota_format(fmt); return error; } EXPORT_SYMBOL(dquot_load_quota_sb); /* * More powerful function for turning on quotas on given quota inode allowing * setting of individual quota flags */ int dquot_load_quota_inode(struct inode *inode, int type, int format_id, unsigned int flags) { int err; err = vfs_setup_quota_inode(inode, type); if (err < 0) return err; err = dquot_load_quota_sb(inode->i_sb, type, format_id, flags); if (err < 0) vfs_cleanup_quota_inode(inode->i_sb, type); return err; } EXPORT_SYMBOL(dquot_load_quota_inode); /* Reenable quotas on remount RW */ int dquot_resume(struct super_block *sb, int type) { struct quota_info *dqopt = sb_dqopt(sb); int ret = 0, cnt; unsigned int flags; rwsem_assert_held_write(&sb->s_umount); for (cnt = 0; cnt < MAXQUOTAS; cnt++) { if (type != -1 && cnt != type) continue; if (!sb_has_quota_suspended(sb, cnt)) continue; spin_lock(&dq_state_lock); flags = dqopt->flags & dquot_state_flag(DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED, cnt); dqopt->flags &= ~dquot_state_flag(DQUOT_STATE_FLAGS, cnt); spin_unlock(&dq_state_lock); flags = dquot_generic_flag(flags, cnt); ret = dquot_load_quota_sb(sb, cnt, dqopt->info[cnt].dqi_fmt_id, flags); if (ret < 0) vfs_cleanup_quota_inode(sb, cnt); } return ret; } EXPORT_SYMBOL(dquot_resume); int dquot_quota_on(struct super_block *sb, int type, int format_id, const struct path *path) { int error = security_quota_on(path->dentry); if (error) return error; /* Quota file not on the same filesystem? */ if (path->dentry->d_sb != sb) error = -EXDEV; else error = dquot_load_quota_inode(d_inode(path->dentry), type, format_id, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); return error; } EXPORT_SYMBOL(dquot_quota_on); /* * This function is used when filesystem needs to initialize quotas * during mount time. */ int dquot_quota_on_mount(struct super_block *sb, char *qf_name, int format_id, int type) { struct dentry *dentry; int error; dentry = lookup_noperm_positive_unlocked(&QSTR(qf_name), sb->s_root); if (IS_ERR(dentry)) return PTR_ERR(dentry); error = security_quota_on(dentry); if (!error) error = dquot_load_quota_inode(d_inode(dentry), type, format_id, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); dput(dentry); return error; } EXPORT_SYMBOL(dquot_quota_on_mount); static int dquot_quota_enable(struct super_block *sb, unsigned int flags) { int ret; int type; struct quota_info *dqopt = sb_dqopt(sb); if (!(dqopt->flags & DQUOT_QUOTA_SYS_FILE)) return -ENOSYS; /* Accounting cannot be turned on while fs is mounted */ flags &= ~(FS_QUOTA_UDQ_ACCT | FS_QUOTA_GDQ_ACCT | FS_QUOTA_PDQ_ACCT); if (!flags) return -EINVAL; for (type = 0; type < MAXQUOTAS; type++) { if (!(flags & qtype_enforce_flag(type))) continue; /* Can't enforce without accounting */ if (!sb_has_quota_usage_enabled(sb, type)) { ret = -EINVAL; goto out_err; } if (sb_has_quota_limits_enabled(sb, type)) { /* compatible with XFS */ ret = -EEXIST; goto out_err; } spin_lock(&dq_state_lock); dqopt->flags |= dquot_state_flag(DQUOT_LIMITS_ENABLED, type); spin_unlock(&dq_state_lock); } return 0; out_err: /* Backout enforcement enablement we already did */ for (type--; type >= 0; type--) { if (flags & qtype_enforce_flag(type)) dquot_disable(sb, type, DQUOT_LIMITS_ENABLED); } return ret; } static int dquot_quota_disable(struct super_block *sb, unsigned int flags) { int ret; int type; struct quota_info *dqopt = sb_dqopt(sb); if (!(dqopt->flags & DQUOT_QUOTA_SYS_FILE)) return -ENOSYS; /* * We don't support turning off accounting via quotactl. In principle * quota infrastructure can do this but filesystems don't expect * userspace to be able to do it. */ if (flags & (FS_QUOTA_UDQ_ACCT | FS_QUOTA_GDQ_ACCT | FS_QUOTA_PDQ_ACCT)) return -EOPNOTSUPP; /* Filter out limits not enabled */ for (type = 0; type < MAXQUOTAS; type++) if (!sb_has_quota_limits_enabled(sb, type)) flags &= ~qtype_enforce_flag(type); /* Nothing left? */ if (!flags) return -EEXIST; for (type = 0; type < MAXQUOTAS; type++) { if (flags & qtype_enforce_flag(type)) { ret = dquot_disable(sb, type, DQUOT_LIMITS_ENABLED); if (ret < 0) goto out_err; } } return 0; out_err: /* Backout enforcement disabling we already did */ for (type--; type >= 0; type--) { if (flags & qtype_enforce_flag(type)) { spin_lock(&dq_state_lock); dqopt->flags |= dquot_state_flag(DQUOT_LIMITS_ENABLED, type); spin_unlock(&dq_state_lock); } } return ret; } /* Generic routine for getting common part of quota structure */ static void do_get_dqblk(struct dquot *dquot, struct qc_dqblk *di) { struct mem_dqblk *dm = &dquot->dq_dqb; memset(di, 0, sizeof(*di)); spin_lock(&dquot->dq_dqb_lock); di->d_spc_hardlimit = dm->dqb_bhardlimit; di->d_spc_softlimit = dm->dqb_bsoftlimit; di->d_ino_hardlimit = dm->dqb_ihardlimit; di->d_ino_softlimit = dm->dqb_isoftlimit; di->d_space = dm->dqb_curspace + dm->dqb_rsvspace; di->d_ino_count = dm->dqb_curinodes; di->d_spc_timer = dm->dqb_btime; di->d_ino_timer = dm->dqb_itime; spin_unlock(&dquot->dq_dqb_lock); } int dquot_get_dqblk(struct super_block *sb, struct kqid qid, struct qc_dqblk *di) { struct dquot *dquot; dquot = dqget(sb, qid); if (IS_ERR(dquot)) return PTR_ERR(dquot); do_get_dqblk(dquot, di); dqput(dquot); return 0; } EXPORT_SYMBOL(dquot_get_dqblk); int dquot_get_next_dqblk(struct super_block *sb, struct kqid *qid, struct qc_dqblk *di) { struct dquot *dquot; int err; if (!sb->dq_op->get_next_id) return -ENOSYS; err = sb->dq_op->get_next_id(sb, qid); if (err < 0) return err; dquot = dqget(sb, *qid); if (IS_ERR(dquot)) return PTR_ERR(dquot); do_get_dqblk(dquot, di); dqput(dquot); return 0; } EXPORT_SYMBOL(dquot_get_next_dqblk); #define VFS_QC_MASK \ (QC_SPACE | QC_SPC_SOFT | QC_SPC_HARD | \ QC_INO_COUNT | QC_INO_SOFT | QC_INO_HARD | \ QC_SPC_TIMER | QC_INO_TIMER) /* Generic routine for setting common part of quota structure */ static int do_set_dqblk(struct dquot *dquot, struct qc_dqblk *di) { struct mem_dqblk *dm = &dquot->dq_dqb; int check_blim = 0, check_ilim = 0; struct mem_dqinfo *dqi = &sb_dqopt(dquot->dq_sb)->info[dquot->dq_id.type]; int ret; if (di->d_fieldmask & ~VFS_QC_MASK) return -EINVAL; if (((di->d_fieldmask & QC_SPC_SOFT) && di->d_spc_softlimit > dqi->dqi_max_spc_limit) || ((di->d_fieldmask & QC_SPC_HARD) && di->d_spc_hardlimit > dqi->dqi_max_spc_limit) || ((di->d_fieldmask & QC_INO_SOFT) && (di->d_ino_softlimit > dqi->dqi_max_ino_limit)) || ((di->d_fieldmask & QC_INO_HARD) && (di->d_ino_hardlimit > dqi->dqi_max_ino_limit))) return -ERANGE; spin_lock(&dquot->dq_dqb_lock); if (di->d_fieldmask & QC_SPACE) { dm->dqb_curspace = di->d_space - dm->dqb_rsvspace; check_blim = 1; set_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags); } if (di->d_fieldmask & QC_SPC_SOFT) dm->dqb_bsoftlimit = di->d_spc_softlimit; if (di->d_fieldmask & QC_SPC_HARD) dm->dqb_bhardlimit = di->d_spc_hardlimit; if (di->d_fieldmask & (QC_SPC_SOFT | QC_SPC_HARD)) { check_blim = 1; set_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags); } if (di->d_fieldmask & QC_INO_COUNT) { dm->dqb_curinodes = di->d_ino_count; check_ilim = 1; set_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags); } if (di->d_fieldmask & QC_INO_SOFT) dm->dqb_isoftlimit = di->d_ino_softlimit; if (di->d_fieldmask & QC_INO_HARD) dm->dqb_ihardlimit = di->d_ino_hardlimit; if (di->d_fieldmask & (QC_INO_SOFT | QC_INO_HARD)) { check_ilim = 1; set_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags); } if (di->d_fieldmask & QC_SPC_TIMER) { dm->dqb_btime = di->d_spc_timer; check_blim = 1; set_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags); } if (di->d_fieldmask & QC_INO_TIMER) { dm->dqb_itime = di->d_ino_timer; check_ilim = 1; set_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags); } if (check_blim) { if (!dm->dqb_bsoftlimit || dm->dqb_curspace + dm->dqb_rsvspace <= dm->dqb_bsoftlimit) { dm->dqb_btime = 0; clear_bit(DQ_BLKS_B, &dquot->dq_flags); } else if (!(di->d_fieldmask & QC_SPC_TIMER)) /* Set grace only if user hasn't provided his own... */ dm->dqb_btime = ktime_get_real_seconds() + dqi->dqi_bgrace; } if (check_ilim) { if (!dm->dqb_isoftlimit || dm->dqb_curinodes <= dm->dqb_isoftlimit) { dm->dqb_itime = 0; clear_bit(DQ_INODES_B, &dquot->dq_flags); } else if (!(di->d_fieldmask & QC_INO_TIMER)) /* Set grace only if user hasn't provided his own... */ dm->dqb_itime = ktime_get_real_seconds() + dqi->dqi_igrace; } if (dm->dqb_bhardlimit || dm->dqb_bsoftlimit || dm->dqb_ihardlimit || dm->dqb_isoftlimit) clear_bit(DQ_FAKE_B, &dquot->dq_flags); else set_bit(DQ_FAKE_B, &dquot->dq_flags); spin_unlock(&dquot->dq_dqb_lock); ret = mark_dquot_dirty(dquot); if (ret < 0) return ret; return 0; } int dquot_set_dqblk(struct super_block *sb, struct kqid qid, struct qc_dqblk *di) { struct dquot *dquot; int rc; dquot = dqget(sb, qid); if (IS_ERR(dquot)) { rc = PTR_ERR(dquot); goto out; } rc = do_set_dqblk(dquot, di); dqput(dquot); out: return rc; } EXPORT_SYMBOL(dquot_set_dqblk); /* Generic routine for getting common part of quota file information */ int dquot_get_state(struct super_block *sb, struct qc_state *state) { struct mem_dqinfo *mi; struct qc_type_state *tstate; struct quota_info *dqopt = sb_dqopt(sb); int type; memset(state, 0, sizeof(*state)); for (type = 0; type < MAXQUOTAS; type++) { if (!sb_has_quota_active(sb, type)) continue; tstate = state->s_state + type; mi = sb_dqopt(sb)->info + type; tstate->flags = QCI_ACCT_ENABLED; spin_lock(&dq_data_lock); if (mi->dqi_flags & DQF_SYS_FILE) tstate->flags |= QCI_SYSFILE; if (mi->dqi_flags & DQF_ROOT_SQUASH) tstate->flags |= QCI_ROOT_SQUASH; if (sb_has_quota_limits_enabled(sb, type)) tstate->flags |= QCI_LIMITS_ENFORCED; tstate->spc_timelimit = mi->dqi_bgrace; tstate->ino_timelimit = mi->dqi_igrace; if (dqopt->files[type]) { tstate->ino = dqopt->files[type]->i_ino; tstate->blocks = dqopt->files[type]->i_blocks; } tstate->nextents = 1; /* We don't know... */ spin_unlock(&dq_data_lock); } return 0; } EXPORT_SYMBOL(dquot_get_state); /* Generic routine for setting common part of quota file information */ int dquot_set_dqinfo(struct super_block *sb, int type, struct qc_info *ii) { struct mem_dqinfo *mi; if ((ii->i_fieldmask & QC_WARNS_MASK) || (ii->i_fieldmask & QC_RT_SPC_TIMER)) return -EINVAL; if (!sb_has_quota_active(sb, type)) return -ESRCH; mi = sb_dqopt(sb)->info + type; if (ii->i_fieldmask & QC_FLAGS) { if ((ii->i_flags & QCI_ROOT_SQUASH && mi->dqi_format->qf_fmt_id != QFMT_VFS_OLD)) return -EINVAL; } spin_lock(&dq_data_lock); if (ii->i_fieldmask & QC_SPC_TIMER) mi->dqi_bgrace = ii->i_spc_timelimit; if (ii->i_fieldmask & QC_INO_TIMER) mi->dqi_igrace = ii->i_ino_timelimit; if (ii->i_fieldmask & QC_FLAGS) { if (ii->i_flags & QCI_ROOT_SQUASH) mi->dqi_flags |= DQF_ROOT_SQUASH; else mi->dqi_flags &= ~DQF_ROOT_SQUASH; } spin_unlock(&dq_data_lock); mark_info_dirty(sb, type); /* Force write to disk */ return sb->dq_op->write_info(sb, type); } EXPORT_SYMBOL(dquot_set_dqinfo); const struct quotactl_ops dquot_quotactl_sysfile_ops = { .quota_enable = dquot_quota_enable, .quota_disable = dquot_quota_disable, .quota_sync = dquot_quota_sync, .get_state = dquot_get_state, .set_info = dquot_set_dqinfo, .get_dqblk = dquot_get_dqblk, .get_nextdqblk = dquot_get_next_dqblk, .set_dqblk = dquot_set_dqblk }; EXPORT_SYMBOL(dquot_quotactl_sysfile_ops); static int do_proc_dqstats(const struct ctl_table *table, int write, void *buffer, size_t *lenp, loff_t *ppos) { unsigned int type = (unsigned long *)table->data - dqstats.stat; s64 value = percpu_counter_sum(&dqstats.counter[type]); /* Filter negative values for non-monotonic counters */ if (value < 0 && (type == DQST_ALLOC_DQUOTS || type == DQST_FREE_DQUOTS)) value = 0; /* Update global table */ dqstats.stat[type] = value; return proc_doulongvec_minmax(table, write, buffer, lenp, ppos); } static const struct ctl_table fs_dqstats_table[] = { { .procname = "lookups", .data = &dqstats.stat[DQST_LOOKUPS], .maxlen = sizeof(unsigned long), .mode = 0444, .proc_handler = do_proc_dqstats, }, { .procname = "drops", .data = &dqstats.stat[DQST_DROPS], .maxlen = sizeof(unsigned long), .mode = 0444, .proc_handler = do_proc_dqstats, }, { .procname = "reads", .data = &dqstats.stat[DQST_READS], .maxlen = sizeof(unsigned long), .mode = 0444, .proc_handler = do_proc_dqstats, }, { .procname = "writes", .data = &dqstats.stat[DQST_WRITES], .maxlen = sizeof(unsigned long), .mode = 0444, .proc_handler = do_proc_dqstats, }, { .procname = "cache_hits", .data = &dqstats.stat[DQST_CACHE_HITS], .maxlen = sizeof(unsigned long), .mode = 0444, .proc_handler = do_proc_dqstats, }, { .procname = "allocated_dquots", .data = &dqstats.stat[DQST_ALLOC_DQUOTS], .maxlen = sizeof(unsigned long), .mode = 0444, .proc_handler = do_proc_dqstats, }, { .procname = "free_dquots", .data = &dqstats.stat[DQST_FREE_DQUOTS], .maxlen = sizeof(unsigned long), .mode = 0444, .proc_handler = do_proc_dqstats, }, { .procname = "syncs", .data = &dqstats.stat[DQST_SYNCS], .maxlen = sizeof(unsigned long), .mode = 0444, .proc_handler = do_proc_dqstats, }, #ifdef CONFIG_PRINT_QUOTA_WARNING { .procname = "warnings", .data = &flag_print_warnings, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, }, #endif }; static int __init dquot_init(void) { int i, ret; unsigned long nr_hash, order; struct shrinker *dqcache_shrinker; printk(KERN_NOTICE "VFS: Disk quotas %s\n", __DQUOT_VERSION__); register_sysctl_init("fs/quota", fs_dqstats_table); dquot_cachep = kmem_cache_create("dquot", sizeof(struct dquot), sizeof(unsigned long) * 4, (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| SLAB_PANIC), NULL); order = 0; dquot_hash = (struct hlist_head *)__get_free_pages(GFP_KERNEL, order); if (!dquot_hash) panic("Cannot create dquot hash table"); ret = percpu_counter_init_many(dqstats.counter, 0, GFP_KERNEL, _DQST_DQSTAT_LAST); if (ret) panic("Cannot create dquot stat counters"); /* Find power-of-two hlist_heads which can fit into allocation */ nr_hash = (1UL << order) * PAGE_SIZE / sizeof(struct hlist_head); dq_hash_bits = ilog2(nr_hash); nr_hash = 1UL << dq_hash_bits; dq_hash_mask = nr_hash - 1; for (i = 0; i < nr_hash; i++) INIT_HLIST_HEAD(dquot_hash + i); pr_info("VFS: Dquot-cache hash table entries: %ld (order %ld," " %ld bytes)\n", nr_hash, order, (PAGE_SIZE << order)); dqcache_shrinker = shrinker_alloc(0, "dquota-cache"); if (!dqcache_shrinker) panic("Cannot allocate dquot shrinker"); dqcache_shrinker->count_objects = dqcache_shrink_count; dqcache_shrinker->scan_objects = dqcache_shrink_scan; shrinker_register(dqcache_shrinker); quota_unbound_wq = alloc_workqueue("quota_events_unbound", WQ_UNBOUND | WQ_MEM_RECLAIM, WQ_MAX_ACTIVE); if (!quota_unbound_wq) panic("Cannot create quota_unbound_wq\n"); return 0; } fs_initcall(dquot_init); |
| 15 17 16 1 17 17 21 22 17 17 18 1 17 1 1 17 15 16 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 | // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB /* * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved. * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved. */ #include <rdma/rdma_netlink.h> #include <net/addrconf.h> #include "rxe.h" #include "rxe_loc.h" MODULE_AUTHOR("Bob Pearson, Frank Zago, John Groves, Kamal Heib"); MODULE_DESCRIPTION("Soft RDMA transport"); MODULE_LICENSE("Dual BSD/GPL"); /* free resources for a rxe device all objects created for this device must * have been destroyed */ void rxe_dealloc(struct ib_device *ib_dev) { struct rxe_dev *rxe = container_of(ib_dev, struct rxe_dev, ib_dev); rxe_pool_cleanup(&rxe->uc_pool); rxe_pool_cleanup(&rxe->pd_pool); rxe_pool_cleanup(&rxe->ah_pool); rxe_pool_cleanup(&rxe->srq_pool); rxe_pool_cleanup(&rxe->qp_pool); rxe_pool_cleanup(&rxe->cq_pool); rxe_pool_cleanup(&rxe->mr_pool); rxe_pool_cleanup(&rxe->mw_pool); WARN_ON(!RB_EMPTY_ROOT(&rxe->mcg_tree)); mutex_destroy(&rxe->usdev_lock); } static const struct ib_device_ops rxe_ib_dev_odp_ops = { .advise_mr = rxe_ib_advise_mr, }; /* initialize rxe device parameters */ static void rxe_init_device_param(struct rxe_dev *rxe, struct net_device *ndev) { rxe->max_inline_data = RXE_MAX_INLINE_DATA; rxe->attr.vendor_id = RXE_VENDOR_ID; rxe->attr.max_mr_size = RXE_MAX_MR_SIZE; rxe->attr.page_size_cap = RXE_PAGE_SIZE_CAP; rxe->attr.max_qp = RXE_MAX_QP; rxe->attr.max_qp_wr = RXE_MAX_QP_WR; rxe->attr.device_cap_flags = RXE_DEVICE_CAP_FLAGS; rxe->attr.kernel_cap_flags = IBK_ALLOW_USER_UNREG; rxe->attr.max_send_sge = RXE_MAX_SGE; rxe->attr.max_recv_sge = RXE_MAX_SGE; rxe->attr.max_sge_rd = RXE_MAX_SGE_RD; rxe->attr.max_cq = RXE_MAX_CQ; rxe->attr.max_cqe = (1 << RXE_MAX_LOG_CQE) - 1; rxe->attr.max_mr = RXE_MAX_MR; rxe->attr.max_mw = RXE_MAX_MW; rxe->attr.max_pd = RXE_MAX_PD; rxe->attr.max_qp_rd_atom = RXE_MAX_QP_RD_ATOM; rxe->attr.max_res_rd_atom = RXE_MAX_RES_RD_ATOM; rxe->attr.max_qp_init_rd_atom = RXE_MAX_QP_INIT_RD_ATOM; rxe->attr.atomic_cap = IB_ATOMIC_HCA; rxe->attr.max_mcast_grp = RXE_MAX_MCAST_GRP; rxe->attr.max_mcast_qp_attach = RXE_MAX_MCAST_QP_ATTACH; rxe->attr.max_total_mcast_qp_attach = RXE_MAX_TOT_MCAST_QP_ATTACH; rxe->attr.max_ah = RXE_MAX_AH; rxe->attr.max_srq = RXE_MAX_SRQ; rxe->attr.max_srq_wr = RXE_MAX_SRQ_WR; rxe->attr.max_srq_sge = RXE_MAX_SRQ_SGE; rxe->attr.max_fast_reg_page_list_len = RXE_MAX_FMR_PAGE_LIST_LEN; rxe->attr.max_pkeys = RXE_MAX_PKEYS; rxe->attr.local_ca_ack_delay = RXE_LOCAL_CA_ACK_DELAY; if (ndev->addr_len) { memcpy(rxe->raw_gid, ndev->dev_addr, min_t(unsigned int, ndev->addr_len, ETH_ALEN)); } else { /* * This device does not have a HW address, but * connection mangagement requires a unique gid. */ eth_random_addr(rxe->raw_gid); } addrconf_addr_eui48((unsigned char *)&rxe->attr.sys_image_guid, rxe->raw_gid); rxe->max_ucontext = RXE_MAX_UCONTEXT; if (IS_ENABLED(CONFIG_INFINIBAND_ON_DEMAND_PAGING)) { rxe->attr.kernel_cap_flags |= IBK_ON_DEMAND_PAGING; /* IB_ODP_SUPPORT_IMPLICIT is not supported right now. */ rxe->attr.odp_caps.general_caps |= IB_ODP_SUPPORT; rxe->attr.odp_caps.per_transport_caps.ud_odp_caps |= IB_ODP_SUPPORT_SEND; rxe->attr.odp_caps.per_transport_caps.ud_odp_caps |= IB_ODP_SUPPORT_RECV; rxe->attr.odp_caps.per_transport_caps.ud_odp_caps |= IB_ODP_SUPPORT_SRQ_RECV; rxe->attr.odp_caps.per_transport_caps.rc_odp_caps |= IB_ODP_SUPPORT_SEND; rxe->attr.odp_caps.per_transport_caps.rc_odp_caps |= IB_ODP_SUPPORT_RECV; rxe->attr.odp_caps.per_transport_caps.rc_odp_caps |= IB_ODP_SUPPORT_WRITE; rxe->attr.odp_caps.per_transport_caps.rc_odp_caps |= IB_ODP_SUPPORT_READ; rxe->attr.odp_caps.per_transport_caps.rc_odp_caps |= IB_ODP_SUPPORT_ATOMIC; rxe->attr.odp_caps.per_transport_caps.rc_odp_caps |= IB_ODP_SUPPORT_SRQ_RECV; rxe->attr.odp_caps.per_transport_caps.rc_odp_caps |= IB_ODP_SUPPORT_FLUSH; rxe->attr.odp_caps.per_transport_caps.rc_odp_caps |= IB_ODP_SUPPORT_ATOMIC_WRITE; /* set handler for ODP prefetching API - ibv_advise_mr(3) */ ib_set_device_ops(&rxe->ib_dev, &rxe_ib_dev_odp_ops); } } /* initialize port attributes */ static void rxe_init_port_param(struct rxe_port *port) { port->attr.state = IB_PORT_DOWN; port->attr.max_mtu = IB_MTU_4096; port->attr.active_mtu = IB_MTU_256; port->attr.gid_tbl_len = RXE_PORT_GID_TBL_LEN; port->attr.port_cap_flags = RXE_PORT_PORT_CAP_FLAGS; port->attr.max_msg_sz = RXE_PORT_MAX_MSG_SZ; port->attr.bad_pkey_cntr = RXE_PORT_BAD_PKEY_CNTR; port->attr.qkey_viol_cntr = RXE_PORT_QKEY_VIOL_CNTR; port->attr.pkey_tbl_len = RXE_PORT_PKEY_TBL_LEN; port->attr.lid = RXE_PORT_LID; port->attr.sm_lid = RXE_PORT_SM_LID; port->attr.lmc = RXE_PORT_LMC; port->attr.max_vl_num = RXE_PORT_MAX_VL_NUM; port->attr.sm_sl = RXE_PORT_SM_SL; port->attr.subnet_timeout = RXE_PORT_SUBNET_TIMEOUT; port->attr.init_type_reply = RXE_PORT_INIT_TYPE_REPLY; port->attr.active_width = RXE_PORT_ACTIVE_WIDTH; port->attr.active_speed = RXE_PORT_ACTIVE_SPEED; port->attr.phys_state = RXE_PORT_PHYS_STATE; port->mtu_cap = ib_mtu_enum_to_int(IB_MTU_256); port->subnet_prefix = cpu_to_be64(RXE_PORT_SUBNET_PREFIX); } /* initialize port state, note IB convention that HCA ports are always * numbered from 1 */ static void rxe_init_ports(struct rxe_dev *rxe, struct net_device *ndev) { struct rxe_port *port = &rxe->port; rxe_init_port_param(port); addrconf_addr_eui48((unsigned char *)&port->port_guid, rxe->raw_gid); spin_lock_init(&port->port_lock); } /* init pools of managed objects */ static void rxe_init_pools(struct rxe_dev *rxe) { rxe_pool_init(rxe, &rxe->uc_pool, RXE_TYPE_UC); rxe_pool_init(rxe, &rxe->pd_pool, RXE_TYPE_PD); rxe_pool_init(rxe, &rxe->ah_pool, RXE_TYPE_AH); rxe_pool_init(rxe, &rxe->srq_pool, RXE_TYPE_SRQ); rxe_pool_init(rxe, &rxe->qp_pool, RXE_TYPE_QP); rxe_pool_init(rxe, &rxe->cq_pool, RXE_TYPE_CQ); rxe_pool_init(rxe, &rxe->mr_pool, RXE_TYPE_MR); rxe_pool_init(rxe, &rxe->mw_pool, RXE_TYPE_MW); } /* initialize rxe device state */ static void rxe_init(struct rxe_dev *rxe, struct net_device *ndev) { /* init default device parameters */ rxe_init_device_param(rxe, ndev); rxe_init_ports(rxe, ndev); rxe_init_pools(rxe); /* init pending mmap list */ spin_lock_init(&rxe->mmap_offset_lock); spin_lock_init(&rxe->pending_lock); INIT_LIST_HEAD(&rxe->pending_mmaps); /* init multicast support */ spin_lock_init(&rxe->mcg_lock); rxe->mcg_tree = RB_ROOT; mutex_init(&rxe->usdev_lock); } void rxe_set_mtu(struct rxe_dev *rxe, unsigned int ndev_mtu) { struct rxe_port *port = &rxe->port; enum ib_mtu mtu; mtu = eth_mtu_int_to_enum(ndev_mtu); /* Make sure that new MTU in range */ mtu = mtu ? min_t(enum ib_mtu, mtu, IB_MTU_4096) : IB_MTU_256; port->attr.active_mtu = mtu; port->mtu_cap = ib_mtu_enum_to_int(mtu); } /* called by ifc layer to create new rxe device. * The caller should allocate memory for rxe by calling ib_alloc_device. */ int rxe_add(struct rxe_dev *rxe, unsigned int mtu, const char *ibdev_name, struct net_device *ndev) { rxe_init(rxe, ndev); rxe_set_mtu(rxe, mtu); return rxe_register_device(rxe, ibdev_name, ndev); } static int rxe_newlink(const char *ibdev_name, struct net_device *ndev) { struct rxe_dev *rxe; int err = 0; if (is_vlan_dev(ndev)) { rxe_err("rxe creation allowed on top of a real device only\n"); err = -EPERM; goto err; } rxe = rxe_get_dev_from_net(ndev); if (rxe) { ib_device_put(&rxe->ib_dev); rxe_err_dev(rxe, "already configured on %s\n", ndev->name); err = -EEXIST; goto err; } err = rxe_net_add(ibdev_name, ndev); if (err) { rxe_err("failed to add %s\n", ndev->name); goto err; } err: return err; } static struct rdma_link_ops rxe_link_ops = { .type = "rxe", .newlink = rxe_newlink, }; static int __init rxe_module_init(void) { int err; err = rxe_alloc_wq(); if (err) return err; err = rxe_net_init(); if (err) { rxe_destroy_wq(); return err; } rdma_link_register(&rxe_link_ops); pr_info("loaded\n"); return 0; } static void __exit rxe_module_exit(void) { rdma_link_unregister(&rxe_link_ops); ib_unregister_driver(RDMA_DRIVER_RXE); rxe_net_exit(); rxe_destroy_wq(); pr_info("unloaded\n"); } late_initcall(rxe_module_init); module_exit(rxe_module_exit); MODULE_ALIAS_RDMA_LINK("rxe"); |
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9538 9539 9540 9541 9542 9543 9544 9545 9546 9547 9548 9549 9550 9551 9552 9553 9554 9555 9556 9557 9558 9559 9560 9561 9562 9563 9564 9565 9566 9567 9568 9569 9570 9571 9572 9573 9574 9575 9576 9577 9578 9579 | // SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2018 Facebook */ #include <uapi/linux/btf.h> #include <uapi/linux/bpf.h> #include <uapi/linux/bpf_perf_event.h> #include <uapi/linux/types.h> #include <linux/seq_file.h> #include <linux/compiler.h> #include <linux/ctype.h> #include <linux/errno.h> #include <linux/slab.h> #include <linux/anon_inodes.h> #include <linux/file.h> #include <linux/uaccess.h> #include <linux/kernel.h> #include <linux/idr.h> #include <linux/sort.h> #include <linux/bpf_verifier.h> #include <linux/btf.h> #include <linux/btf_ids.h> #include <linux/bpf.h> #include <linux/bpf_lsm.h> #include <linux/skmsg.h> #include <linux/perf_event.h> #include <linux/bsearch.h> #include <linux/kobject.h> #include <linux/sysfs.h> #include <linux/overflow.h> #include <net/netfilter/nf_bpf_link.h> #include <net/sock.h> #include <net/xdp.h> #include "../tools/lib/bpf/relo_core.h" /* BTF (BPF Type Format) is the meta data format which describes * the data types of BPF program/map. Hence, it basically focus * on the C programming language which the modern BPF is primary * using. * * ELF Section: * ~~~~~~~~~~~ * The BTF data is stored under the ".BTF" ELF section * * struct btf_type: * ~~~~~~~~~~~~~~~ * Each 'struct btf_type' object describes a C data type. * Depending on the type it is describing, a 'struct btf_type' * object may be followed by more data. F.e. * To describe an array, 'struct btf_type' is followed by * 'struct btf_array'. * * 'struct btf_type' and any extra data following it are * 4 bytes aligned. * * Type section: * ~~~~~~~~~~~~~ * The BTF type section contains a list of 'struct btf_type' objects. * Each one describes a C type. Recall from the above section * that a 'struct btf_type' object could be immediately followed by extra * data in order to describe some particular C types. * * type_id: * ~~~~~~~ * Each btf_type object is identified by a type_id. The type_id * is implicitly implied by the location of the btf_type object in * the BTF type section. The first one has type_id 1. The second * one has type_id 2...etc. Hence, an earlier btf_type has * a smaller type_id. * * A btf_type object may refer to another btf_type object by using * type_id (i.e. the "type" in the "struct btf_type"). * * NOTE that we cannot assume any reference-order. * A btf_type object can refer to an earlier btf_type object * but it can also refer to a later btf_type object. * * For example, to describe "const void *". A btf_type * object describing "const" may refer to another btf_type * object describing "void *". This type-reference is done * by specifying type_id: * * [1] CONST (anon) type_id=2 * [2] PTR (anon) type_id=0 * * The above is the btf_verifier debug log: * - Each line started with "[?]" is a btf_type object * - [?] is the type_id of the btf_type object. * - CONST/PTR is the BTF_KIND_XXX * - "(anon)" is the name of the type. It just * happens that CONST and PTR has no name. * - type_id=XXX is the 'u32 type' in btf_type * * NOTE: "void" has type_id 0 * * String section: * ~~~~~~~~~~~~~~ * The BTF string section contains the names used by the type section. * Each string is referred by an "offset" from the beginning of the * string section. * * Each string is '\0' terminated. * * The first character in the string section must be '\0' * which is used to mean 'anonymous'. Some btf_type may not * have a name. */ /* BTF verification: * * To verify BTF data, two passes are needed. * * Pass #1 * ~~~~~~~ * The first pass is to collect all btf_type objects to * an array: "btf->types". * * Depending on the C type that a btf_type is describing, * a btf_type may be followed by extra data. We don't know * how many btf_type is there, and more importantly we don't * know where each btf_type is located in the type section. * * Without knowing the location of each type_id, most verifications * cannot be done. e.g. an earlier btf_type may refer to a later * btf_type (recall the "const void *" above), so we cannot * check this type-reference in the first pass. * * In the first pass, it still does some verifications (e.g. * checking the name is a valid offset to the string section). * * Pass #2 * ~~~~~~~ * The main focus is to resolve a btf_type that is referring * to another type. * * We have to ensure the referring type: * 1) does exist in the BTF (i.e. in btf->types[]) * 2) does not cause a loop: * struct A { * struct B b; * }; * * struct B { * struct A a; * }; * * btf_type_needs_resolve() decides if a btf_type needs * to be resolved. * * The needs_resolve type implements the "resolve()" ops which * essentially does a DFS and detects backedge. * * During resolve (or DFS), different C types have different * "RESOLVED" conditions. * * When resolving a BTF_KIND_STRUCT, we need to resolve all its * members because a member is always referring to another * type. A struct's member can be treated as "RESOLVED" if * it is referring to a BTF_KIND_PTR. Otherwise, the * following valid C struct would be rejected: * * struct A { * int m; * struct A *a; * }; * * When resolving a BTF_KIND_PTR, it needs to keep resolving if * it is referring to another BTF_KIND_PTR. Otherwise, we cannot * detect a pointer loop, e.g.: * BTF_KIND_CONST -> BTF_KIND_PTR -> BTF_KIND_CONST -> BTF_KIND_PTR + * ^ | * +-----------------------------------------+ * */ #define BITS_PER_U128 (sizeof(u64) * BITS_PER_BYTE * 2) #define BITS_PER_BYTE_MASK (BITS_PER_BYTE - 1) #define BITS_PER_BYTE_MASKED(bits) ((bits) & BITS_PER_BYTE_MASK) #define BITS_ROUNDDOWN_BYTES(bits) ((bits) >> 3) #define BITS_ROUNDUP_BYTES(bits) \ (BITS_ROUNDDOWN_BYTES(bits) + !!BITS_PER_BYTE_MASKED(bits)) #define BTF_INFO_MASK 0x9f00ffff #define BTF_INT_MASK 0x0fffffff #define BTF_TYPE_ID_VALID(type_id) ((type_id) <= BTF_MAX_TYPE) #define BTF_STR_OFFSET_VALID(name_off) ((name_off) <= BTF_MAX_NAME_OFFSET) /* 16MB for 64k structs and each has 16 members and * a few MB spaces for the string section. * The hard limit is S32_MAX. */ #define BTF_MAX_SIZE (16 * 1024 * 1024) #define for_each_member_from(i, from, struct_type, member) \ for (i = from, member = btf_type_member(struct_type) + from; \ i < btf_type_vlen(struct_type); \ i++, member++) #define for_each_vsi_from(i, from, struct_type, member) \ for (i = from, member = btf_type_var_secinfo(struct_type) + from; \ i < btf_type_vlen(struct_type); \ i++, member++) DEFINE_IDR(btf_idr); DEFINE_SPINLOCK(btf_idr_lock); enum btf_kfunc_hook { BTF_KFUNC_HOOK_COMMON, BTF_KFUNC_HOOK_XDP, BTF_KFUNC_HOOK_TC, BTF_KFUNC_HOOK_STRUCT_OPS, BTF_KFUNC_HOOK_TRACING, BTF_KFUNC_HOOK_SYSCALL, BTF_KFUNC_HOOK_FMODRET, BTF_KFUNC_HOOK_CGROUP, BTF_KFUNC_HOOK_SCHED_ACT, BTF_KFUNC_HOOK_SK_SKB, BTF_KFUNC_HOOK_SOCKET_FILTER, BTF_KFUNC_HOOK_LWT, BTF_KFUNC_HOOK_NETFILTER, BTF_KFUNC_HOOK_KPROBE, BTF_KFUNC_HOOK_MAX, }; enum { BTF_KFUNC_SET_MAX_CNT = 256, BTF_DTOR_KFUNC_MAX_CNT = 256, BTF_KFUNC_FILTER_MAX_CNT = 16, }; struct btf_kfunc_hook_filter { btf_kfunc_filter_t filters[BTF_KFUNC_FILTER_MAX_CNT]; u32 nr_filters; }; struct btf_kfunc_set_tab { struct btf_id_set8 *sets[BTF_KFUNC_HOOK_MAX]; struct btf_kfunc_hook_filter hook_filters[BTF_KFUNC_HOOK_MAX]; }; struct btf_id_dtor_kfunc_tab { u32 cnt; struct btf_id_dtor_kfunc dtors[]; }; struct btf_struct_ops_tab { u32 cnt; u32 capacity; struct bpf_struct_ops_desc ops[]; }; struct btf { void *data; struct btf_type **types; u32 *resolved_ids; u32 *resolved_sizes; const char *strings; void *nohdr_data; struct btf_header hdr; u32 nr_types; /* includes VOID for base BTF */ u32 types_size; u32 data_size; refcount_t refcnt; u32 id; struct rcu_head rcu; struct btf_kfunc_set_tab *kfunc_set_tab; struct btf_id_dtor_kfunc_tab *dtor_kfunc_tab; struct btf_struct_metas *struct_meta_tab; struct btf_struct_ops_tab *struct_ops_tab; /* split BTF support */ struct btf *base_btf; u32 start_id; /* first type ID in this BTF (0 for base BTF) */ u32 start_str_off; /* first string offset (0 for base BTF) */ char name[MODULE_NAME_LEN]; bool kernel_btf; __u32 *base_id_map; /* map from distilled base BTF -> vmlinux BTF ids */ }; enum verifier_phase { CHECK_META, CHECK_TYPE, }; struct resolve_vertex { const struct btf_type *t; u32 type_id; u16 next_member; }; enum visit_state { NOT_VISITED, VISITED, RESOLVED, }; enum resolve_mode { RESOLVE_TBD, /* To Be Determined */ RESOLVE_PTR, /* Resolving for Pointer */ RESOLVE_STRUCT_OR_ARRAY, /* Resolving for struct/union * or array */ }; #define MAX_RESOLVE_DEPTH 32 struct btf_sec_info { u32 off; u32 len; }; struct btf_verifier_env { struct btf *btf; u8 *visit_states; struct resolve_vertex stack[MAX_RESOLVE_DEPTH]; struct bpf_verifier_log log; u32 log_type_id; u32 top_stack; enum verifier_phase phase; enum resolve_mode resolve_mode; }; static const char * const btf_kind_str[NR_BTF_KINDS] = { [BTF_KIND_UNKN] = "UNKNOWN", [BTF_KIND_INT] = "INT", [BTF_KIND_PTR] = "PTR", [BTF_KIND_ARRAY] = "ARRAY", [BTF_KIND_STRUCT] = "STRUCT", [BTF_KIND_UNION] = "UNION", [BTF_KIND_ENUM] = "ENUM", [BTF_KIND_FWD] = "FWD", [BTF_KIND_TYPEDEF] = "TYPEDEF", [BTF_KIND_VOLATILE] = "VOLATILE", [BTF_KIND_CONST] = "CONST", [BTF_KIND_RESTRICT] = "RESTRICT", [BTF_KIND_FUNC] = "FUNC", [BTF_KIND_FUNC_PROTO] = "FUNC_PROTO", [BTF_KIND_VAR] = "VAR", [BTF_KIND_DATASEC] = "DATASEC", [BTF_KIND_FLOAT] = "FLOAT", [BTF_KIND_DECL_TAG] = "DECL_TAG", [BTF_KIND_TYPE_TAG] = "TYPE_TAG", [BTF_KIND_ENUM64] = "ENUM64", }; const char *btf_type_str(const struct btf_type *t) { return btf_kind_str[BTF_INFO_KIND(t->info)]; } /* Chunk size we use in safe copy of data to be shown. */ #define BTF_SHOW_OBJ_SAFE_SIZE 32 /* * This is the maximum size of a base type value (equivalent to a * 128-bit int); if we are at the end of our safe buffer and have * less than 16 bytes space we can't be assured of being able * to copy the next type safely, so in such cases we will initiate * a new copy. */ #define BTF_SHOW_OBJ_BASE_TYPE_SIZE 16 /* Type name size */ #define BTF_SHOW_NAME_SIZE 80 /* * The suffix of a type that indicates it cannot alias another type when * comparing BTF IDs for kfunc invocations. */ #define NOCAST_ALIAS_SUFFIX "___init" /* * Common data to all BTF show operations. Private show functions can add * their own data to a structure containing a struct btf_show and consult it * in the show callback. See btf_type_show() below. * * One challenge with showing nested data is we want to skip 0-valued * data, but in order to figure out whether a nested object is all zeros * we need to walk through it. As a result, we need to make two passes * when handling structs, unions and arrays; the first path simply looks * for nonzero data, while the second actually does the display. The first * pass is signalled by show->state.depth_check being set, and if we * encounter a non-zero value we set show->state.depth_to_show to * the depth at which we encountered it. When we have completed the * first pass, we will know if anything needs to be displayed if * depth_to_show > depth. See btf_[struct,array]_show() for the * implementation of this. * * Another problem is we want to ensure the data for display is safe to * access. To support this, the anonymous "struct {} obj" tracks the data * object and our safe copy of it. We copy portions of the data needed * to the object "copy" buffer, but because its size is limited to * BTF_SHOW_OBJ_COPY_LEN bytes, multiple copies may be required as we * traverse larger objects for display. * * The various data type show functions all start with a call to * btf_show_start_type() which returns a pointer to the safe copy * of the data needed (or if BTF_SHOW_UNSAFE is specified, to the * raw data itself). btf_show_obj_safe() is responsible for * using copy_from_kernel_nofault() to update the safe data if necessary * as we traverse the object's data. skbuff-like semantics are * used: * * - obj.head points to the start of the toplevel object for display * - obj.size is the size of the toplevel object * - obj.data points to the current point in the original data at * which our safe data starts. obj.data will advance as we copy * portions of the data. * * In most cases a single copy will suffice, but larger data structures * such as "struct task_struct" will require many copies. The logic in * btf_show_obj_safe() handles the logic that determines if a new * copy_from_kernel_nofault() is needed. */ struct btf_show { u64 flags; void *target; /* target of show operation (seq file, buffer) */ __printf(2, 0) void (*showfn)(struct btf_show *show, const char *fmt, va_list args); const struct btf *btf; /* below are used during iteration */ struct { u8 depth; u8 depth_to_show; u8 depth_check; u8 array_member:1, array_terminated:1; u16 array_encoding; u32 type_id; int status; /* non-zero for error */ const struct btf_type *type; const struct btf_member *member; char name[BTF_SHOW_NAME_SIZE]; /* space for member name/type */ } state; struct { u32 size; void *head; void *data; u8 safe[BTF_SHOW_OBJ_SAFE_SIZE]; } obj; }; struct btf_kind_operations { s32 (*check_meta)(struct btf_verifier_env *env, const struct btf_type *t, u32 meta_left); int (*resolve)(struct btf_verifier_env *env, const struct resolve_vertex *v); int (*check_member)(struct btf_verifier_env *env, const struct btf_type *struct_type, const struct btf_member *member, const struct btf_type *member_type); int (*check_kflag_member)(struct btf_verifier_env *env, const struct btf_type *struct_type, const struct btf_member *member, const struct btf_type *member_type); void (*log_details)(struct btf_verifier_env *env, const struct btf_type *t); void (*show)(const struct btf *btf, const struct btf_type *t, u32 type_id, void *data, u8 bits_offsets, struct btf_show *show); }; static const struct btf_kind_operations * const kind_ops[NR_BTF_KINDS]; static struct btf_type btf_void; static int btf_resolve(struct btf_verifier_env *env, const struct btf_type *t, u32 type_id); static int btf_func_check(struct btf_verifier_env *env, const struct btf_type *t); static bool btf_type_is_modifier(const struct btf_type *t) { /* Some of them is not strictly a C modifier * but they are grouped into the same bucket * for BTF concern: * A type (t) that refers to another * type through t->type AND its size cannot * be determined without following the t->type. * * ptr does not fall into this bucket * because its size is always sizeof(void *). */ switch (BTF_INFO_KIND(t->info)) { case BTF_KIND_TYPEDEF: case BTF_KIND_VOLATILE: case BTF_KIND_CONST: case BTF_KIND_RESTRICT: case BTF_KIND_TYPE_TAG: return true; } return false; } bool btf_type_is_void(const struct btf_type *t) { return t == &btf_void; } static bool btf_type_is_datasec(const struct btf_type *t) { return BTF_INFO_KIND(t->info) == BTF_KIND_DATASEC; } static bool btf_type_is_decl_tag(const struct btf_type *t) { return BTF_INFO_KIND(t->info) == BTF_KIND_DECL_TAG; } static bool btf_type_nosize(const struct btf_type *t) { return btf_type_is_void(t) || btf_type_is_fwd(t) || btf_type_is_func(t) || btf_type_is_func_proto(t) || btf_type_is_decl_tag(t); } static bool btf_type_nosize_or_null(const struct btf_type *t) { return !t || btf_type_nosize(t); } static bool btf_type_is_decl_tag_target(const struct btf_type *t) { return btf_type_is_func(t) || btf_type_is_struct(t) || btf_type_is_var(t) || btf_type_is_typedef(t); } bool btf_is_vmlinux(const struct btf *btf) { return btf->kernel_btf && !btf->base_btf; } u32 btf_nr_types(const struct btf *btf) { u32 total = 0; while (btf) { total += btf->nr_types; btf = btf->base_btf; } return total; } s32 btf_find_by_name_kind(const struct btf *btf, const char *name, u8 kind) { const struct btf_type *t; const char *tname; u32 i, total; total = btf_nr_types(btf); for (i = 1; i < total; i++) { t = btf_type_by_id(btf, i); if (BTF_INFO_KIND(t->info) != kind) continue; tname = btf_name_by_offset(btf, t->name_off); if (!strcmp(tname, name)) return i; } return -ENOENT; } s32 bpf_find_btf_id(const char *name, u32 kind, struct btf **btf_p) { struct btf *btf; s32 ret; int id; btf = bpf_get_btf_vmlinux(); if (IS_ERR(btf)) return PTR_ERR(btf); if (!btf) return -EINVAL; ret = btf_find_by_name_kind(btf, name, kind); /* ret is never zero, since btf_find_by_name_kind returns * positive btf_id or negative error. */ if (ret > 0) { btf_get(btf); *btf_p = btf; return ret; } /* If name is not found in vmlinux's BTF then search in module's BTFs */ spin_lock_bh(&btf_idr_lock); idr_for_each_entry(&btf_idr, btf, id) { if (!btf_is_module(btf)) continue; /* linear search could be slow hence unlock/lock * the IDR to avoiding holding it for too long */ btf_get(btf); spin_unlock_bh(&btf_idr_lock); ret = btf_find_by_name_kind(btf, name, kind); if (ret > 0) { *btf_p = btf; return ret; } btf_put(btf); spin_lock_bh(&btf_idr_lock); } spin_unlock_bh(&btf_idr_lock); return ret; } EXPORT_SYMBOL_GPL(bpf_find_btf_id); const struct btf_type *btf_type_skip_modifiers(const struct btf *btf, u32 id, u32 *res_id) { const struct btf_type *t = btf_type_by_id(btf, id); while (btf_type_is_modifier(t)) { id = t->type; t = btf_type_by_id(btf, t->type); } if (res_id) *res_id = id; return t; } const struct btf_type *btf_type_resolve_ptr(const struct btf *btf, u32 id, u32 *res_id) { const struct btf_type *t; t = btf_type_skip_modifiers(btf, id, NULL); if (!btf_type_is_ptr(t)) return NULL; return btf_type_skip_modifiers(btf, t->type, res_id); } const struct btf_type *btf_type_resolve_func_ptr(const struct btf *btf, u32 id, u32 *res_id) { const struct btf_type *ptype; ptype = btf_type_resolve_ptr(btf, id, res_id); if (ptype && btf_type_is_func_proto(ptype)) return ptype; return NULL; } /* Types that act only as a source, not sink or intermediate * type when resolving. */ static bool btf_type_is_resolve_source_only(const struct btf_type *t) { return btf_type_is_var(t) || btf_type_is_decl_tag(t) || btf_type_is_datasec(t); } /* What types need to be resolved? * * btf_type_is_modifier() is an obvious one. * * btf_type_is_struct() because its member refers to * another type (through member->type). * * btf_type_is_var() because the variable refers to * another type. btf_type_is_datasec() holds multiple * btf_type_is_var() types that need resolving. * * btf_type_is_array() because its element (array->type) * refers to another type. Array can be thought of a * special case of struct while array just has the same * member-type repeated by array->nelems of times. */ static bool btf_type_needs_resolve(const struct btf_type *t) { return btf_type_is_modifier(t) || btf_type_is_ptr(t) || btf_type_is_struct(t) || btf_type_is_array(t) || btf_type_is_var(t) || btf_type_is_func(t) || btf_type_is_decl_tag(t) || btf_type_is_datasec(t); } /* t->size can be used */ static bool btf_type_has_size(const struct btf_type *t) { switch (BTF_INFO_KIND(t->info)) { case BTF_KIND_INT: case BTF_KIND_STRUCT: case BTF_KIND_UNION: case BTF_KIND_ENUM: case BTF_KIND_DATASEC: case BTF_KIND_FLOAT: case BTF_KIND_ENUM64: return true; } return false; } static const char *btf_int_encoding_str(u8 encoding) { if (encoding == 0) return "(none)"; else if (encoding == BTF_INT_SIGNED) return "SIGNED"; else if (encoding == BTF_INT_CHAR) return "CHAR"; else if (encoding == BTF_INT_BOOL) return "BOOL"; else return "UNKN"; } static u32 btf_type_int(const struct btf_type *t) { return *(u32 *)(t + 1); } static const struct btf_array *btf_type_array(const struct btf_type *t) { return (const struct btf_array *)(t + 1); } static const struct btf_enum *btf_type_enum(const struct btf_type *t) { return (const struct btf_enum *)(t + 1); } static const struct btf_var *btf_type_var(const struct btf_type *t) { return (const struct btf_var *)(t + 1); } static const struct btf_decl_tag *btf_type_decl_tag(const struct btf_type *t) { return (const struct btf_decl_tag *)(t + 1); } static const struct btf_enum64 *btf_type_enum64(const struct btf_type *t) { return (const struct btf_enum64 *)(t + 1); } static const struct btf_kind_operations *btf_type_ops(const struct btf_type *t) { return kind_ops[BTF_INFO_KIND(t->info)]; } static bool btf_name_offset_valid(const struct btf *btf, u32 offset) { if (!BTF_STR_OFFSET_VALID(offset)) return false; while (offset < btf->start_str_off) btf = btf->base_btf; offset -= btf->start_str_off; return offset < btf->hdr.str_len; } static bool __btf_name_char_ok(char c, bool first) { if ((first ? !isalpha(c) : !isalnum(c)) && c != '_' && c != '.') return false; return true; } const char *btf_str_by_offset(const struct btf *btf, u32 offset) { while (offset < btf->start_str_off) btf = btf->base_btf; offset -= btf->start_str_off; if (offset < btf->hdr.str_len) return &btf->strings[offset]; return NULL; } static bool btf_name_valid_identifier(const struct btf *btf, u32 offset) { /* offset must be valid */ const char *src = btf_str_by_offset(btf, offset); const char *src_limit; if (!__btf_name_char_ok(*src, true)) return false; /* set a limit on identifier length */ src_limit = src + KSYM_NAME_LEN; src++; while (*src && src < src_limit) { if (!__btf_name_char_ok(*src, false)) return false; src++; } return !*src; } /* Allow any printable character in DATASEC names */ static bool btf_name_valid_section(const struct btf *btf, u32 offset) { /* offset must be valid */ const char *src = btf_str_by_offset(btf, offset); const char *src_limit; if (!*src) return false; /* set a limit on identifier length */ src_limit = src + KSYM_NAME_LEN; while (*src && src < src_limit) { if (!isprint(*src)) return false; src++; } return !*src; } static const char *__btf_name_by_offset(const struct btf *btf, u32 offset) { const char *name; if (!offset) return "(anon)"; name = btf_str_by_offset(btf, offset); return name ?: "(invalid-name-offset)"; } const char *btf_name_by_offset(const struct btf *btf, u32 offset) { return btf_str_by_offset(btf, offset); } const struct btf_type *btf_type_by_id(const struct btf *btf, u32 type_id) { while (type_id < btf->start_id) btf = btf->base_btf; type_id -= btf->start_id; if (type_id >= btf->nr_types) return NULL; return btf->types[type_id]; } EXPORT_SYMBOL_GPL(btf_type_by_id); /* * Check that the type @t is a regular int. This means that @t is not * a bit field and it has the same size as either of u8/u16/u32/u64 * or __int128. If @expected_size is not zero, then size of @t should * be the same. A caller should already have checked that the type @t * is an integer. */ static bool __btf_type_int_is_regular(const struct btf_type *t, size_t expected_size) { u32 int_data = btf_type_int(t); u8 nr_bits = BTF_INT_BITS(int_data); u8 nr_bytes = BITS_ROUNDUP_BYTES(nr_bits); return BITS_PER_BYTE_MASKED(nr_bits) == 0 && BTF_INT_OFFSET(int_data) == 0 && (nr_bytes <= 16 && is_power_of_2(nr_bytes)) && (expected_size == 0 || nr_bytes == expected_size); } static bool btf_type_int_is_regular(const struct btf_type *t) { return __btf_type_int_is_regular(t, 0); } bool btf_type_is_i32(const struct btf_type *t) { return btf_type_is_int(t) && __btf_type_int_is_regular(t, 4); } bool btf_type_is_i64(const struct btf_type *t) { return btf_type_is_int(t) && __btf_type_int_is_regular(t, 8); } bool btf_type_is_primitive(const struct btf_type *t) { return (btf_type_is_int(t) && btf_type_int_is_regular(t)) || btf_is_any_enum(t); } /* * Check that given struct member is a regular int with expected * offset and size. */ bool btf_member_is_reg_int(const struct btf *btf, const struct btf_type *s, const struct btf_member *m, u32 expected_offset, u32 expected_size) { const struct btf_type *t; u32 id, int_data; u8 nr_bits; id = m->type; t = btf_type_id_size(btf, &id, NULL); if (!t || !btf_type_is_int(t)) return false; int_data = btf_type_int(t); nr_bits = BTF_INT_BITS(int_data); if (btf_type_kflag(s)) { u32 bitfield_size = BTF_MEMBER_BITFIELD_SIZE(m->offset); u32 bit_offset = BTF_MEMBER_BIT_OFFSET(m->offset); /* if kflag set, int should be a regular int and * bit offset should be at byte boundary. */ return !bitfield_size && BITS_ROUNDUP_BYTES(bit_offset) == expected_offset && BITS_ROUNDUP_BYTES(nr_bits) == expected_size; } if (BTF_INT_OFFSET(int_data) || BITS_PER_BYTE_MASKED(m->offset) || BITS_ROUNDUP_BYTES(m->offset) != expected_offset || BITS_PER_BYTE_MASKED(nr_bits) || BITS_ROUNDUP_BYTES(nr_bits) != expected_size) return false; return true; } /* Similar to btf_type_skip_modifiers() but does not skip typedefs. */ static const struct btf_type *btf_type_skip_qualifiers(const struct btf *btf, u32 id) { const struct btf_type *t = btf_type_by_id(btf, id); while (btf_type_is_modifier(t) && BTF_INFO_KIND(t->info) != BTF_KIND_TYPEDEF) { t = btf_type_by_id(btf, t->type); } return t; } #define BTF_SHOW_MAX_ITER 10 #define BTF_KIND_BIT(kind) (1ULL << kind) /* * Populate show->state.name with type name information. * Format of type name is * * [.member_name = ] (type_name) */ static const char *btf_show_name(struct btf_show *show) { /* BTF_MAX_ITER array suffixes "[]" */ const char *array_suffixes = "[][][][][][][][][][]"; const char *array_suffix = &array_suffixes[strlen(array_suffixes)]; /* BTF_MAX_ITER pointer suffixes "*" */ const char *ptr_suffixes = "**********"; const char *ptr_suffix = &ptr_suffixes[strlen(ptr_suffixes)]; const char *name = NULL, *prefix = "", *parens = ""; const struct btf_member *m = show->state.member; const struct btf_type *t; const struct btf_array *array; u32 id = show->state.type_id; const char *member = NULL; bool show_member = false; u64 kinds = 0; int i; show->state.name[0] = '\0'; /* * Don't show type name if we're showing an array member; * in that case we show the array type so don't need to repeat * ourselves for each member. */ if (show->state.array_member) return ""; /* Retrieve member name, if any. */ if (m) { member = btf_name_by_offset(show->btf, m->name_off); show_member = strlen(member) > 0; id = m->type; } /* * Start with type_id, as we have resolved the struct btf_type * * via btf_modifier_show() past the parent typedef to the child * struct, int etc it is defined as. In such cases, the type_id * still represents the starting type while the struct btf_type * * in our show->state points at the resolved type of the typedef. */ t = btf_type_by_id(show->btf, id); if (!t) return ""; /* * The goal here is to build up the right number of pointer and * array suffixes while ensuring the type name for a typedef * is represented. Along the way we accumulate a list of * BTF kinds we have encountered, since these will inform later * display; for example, pointer types will not require an * opening "{" for struct, we will just display the pointer value. * * We also want to accumulate the right number of pointer or array * indices in the format string while iterating until we get to * the typedef/pointee/array member target type. * * We start by pointing at the end of pointer and array suffix * strings; as we accumulate pointers and arrays we move the pointer * or array string backwards so it will show the expected number of * '*' or '[]' for the type. BTF_SHOW_MAX_ITER of nesting of pointers * and/or arrays and typedefs are supported as a precaution. * * We also want to get typedef name while proceeding to resolve * type it points to so that we can add parentheses if it is a * "typedef struct" etc. */ for (i = 0; i < BTF_SHOW_MAX_ITER; i++) { switch (BTF_INFO_KIND(t->info)) { case BTF_KIND_TYPEDEF: if (!name) name = btf_name_by_offset(show->btf, t->name_off); kinds |= BTF_KIND_BIT(BTF_KIND_TYPEDEF); id = t->type; break; case BTF_KIND_ARRAY: kinds |= BTF_KIND_BIT(BTF_KIND_ARRAY); parens = "["; if (!t) return ""; array = btf_type_array(t); if (array_suffix > array_suffixes) array_suffix -= 2; id = array->type; break; case BTF_KIND_PTR: kinds |= BTF_KIND_BIT(BTF_KIND_PTR); if (ptr_suffix > ptr_suffixes) ptr_suffix -= 1; id = t->type; break; default: id = 0; break; } if (!id) break; t = btf_type_skip_qualifiers(show->btf, id); } /* We may not be able to represent this type; bail to be safe */ if (i == BTF_SHOW_MAX_ITER) return ""; if (!name) name = btf_name_by_offset(show->btf, t->name_off); switch (BTF_INFO_KIND(t->info)) { case BTF_KIND_STRUCT: case BTF_KIND_UNION: prefix = BTF_INFO_KIND(t->info) == BTF_KIND_STRUCT ? "struct" : "union"; /* if it's an array of struct/union, parens is already set */ if (!(kinds & (BTF_KIND_BIT(BTF_KIND_ARRAY)))) parens = "{"; break; case BTF_KIND_ENUM: case BTF_KIND_ENUM64: prefix = "enum"; break; default: break; } /* pointer does not require parens */ if (kinds & BTF_KIND_BIT(BTF_KIND_PTR)) parens = ""; /* typedef does not require struct/union/enum prefix */ if (kinds & BTF_KIND_BIT(BTF_KIND_TYPEDEF)) prefix = ""; if (!name) name = ""; /* Even if we don't want type name info, we want parentheses etc */ if (show->flags & BTF_SHOW_NONAME) snprintf(show->state.name, sizeof(show->state.name), "%s", parens); else snprintf(show->state.name, sizeof(show->state.name), "%s%s%s(%s%s%s%s%s%s)%s", /* first 3 strings comprise ".member = " */ show_member ? "." : "", show_member ? member : "", show_member ? " = " : "", /* ...next is our prefix (struct, enum, etc) */ prefix, strlen(prefix) > 0 && strlen(name) > 0 ? " " : "", /* ...this is the type name itself */ name, /* ...suffixed by the appropriate '*', '[]' suffixes */ strlen(ptr_suffix) > 0 ? " " : "", ptr_suffix, array_suffix, parens); return show->state.name; } static const char *__btf_show_indent(struct btf_show *show) { const char *indents = " "; const char *indent = &indents[strlen(indents)]; if ((indent - show->state.depth) >= indents) return indent - show->state.depth; return indents; } static const char *btf_show_indent(struct btf_show *show) { return show->flags & BTF_SHOW_COMPACT ? "" : __btf_show_indent(show); } static const char *btf_show_newline(struct btf_show *show) { return show->flags & BTF_SHOW_COMPACT ? "" : "\n"; } static const char *btf_show_delim(struct btf_show *show) { if (show->state.depth == 0) return ""; if ((show->flags & BTF_SHOW_COMPACT) && show->state.type && BTF_INFO_KIND(show->state.type->info) == BTF_KIND_UNION) return "|"; return ","; } __printf(2, 3) static void btf_show(struct btf_show *show, const char *fmt, ...) { va_list args; if (!show->state.depth_check) { va_start(args, fmt); show->showfn(show, fmt, args); va_end(args); } } /* Macros are used here as btf_show_type_value[s]() prepends and appends * format specifiers to the format specifier passed in; these do the work of * adding indentation, delimiters etc while the caller simply has to specify * the type value(s) in the format specifier + value(s). */ #define btf_show_type_value(show, fmt, value) \ do { \ if ((value) != (__typeof__(value))0 || \ (show->flags & BTF_SHOW_ZERO) || \ show->state.depth == 0) { \ btf_show(show, "%s%s" fmt "%s%s", \ btf_show_indent(show), \ btf_show_name(show), \ value, btf_show_delim(show), \ btf_show_newline(show)); \ if (show->state.depth > show->state.depth_to_show) \ show->state.depth_to_show = show->state.depth; \ } \ } while (0) #define btf_show_type_values(show, fmt, ...) \ do { \ btf_show(show, "%s%s" fmt "%s%s", btf_show_indent(show), \ btf_show_name(show), \ __VA_ARGS__, btf_show_delim(show), \ btf_show_newline(show)); \ if (show->state.depth > show->state.depth_to_show) \ show->state.depth_to_show = show->state.depth; \ } while (0) /* How much is left to copy to safe buffer after @data? */ static int btf_show_obj_size_left(struct btf_show *show, void *data) { return show->obj.head + show->obj.size - data; } /* Is object pointed to by @data of @size already copied to our safe buffer? */ static bool btf_show_obj_is_safe(struct btf_show *show, void *data, int size) { return data >= show->obj.data && (data + size) < (show->obj.data + BTF_SHOW_OBJ_SAFE_SIZE); } /* * If object pointed to by @data of @size falls within our safe buffer, return * the equivalent pointer to the same safe data. Assumes * copy_from_kernel_nofault() has already happened and our safe buffer is * populated. */ static void *__btf_show_obj_safe(struct btf_show *show, void *data, int size) { if (btf_show_obj_is_safe(show, data, size)) return show->obj.safe + (data - show->obj.data); return NULL; } /* * Return a safe-to-access version of data pointed to by @data. * We do this by copying the relevant amount of information * to the struct btf_show obj.safe buffer using copy_from_kernel_nofault(). * * If BTF_SHOW_UNSAFE is specified, just return data as-is; no * safe copy is needed. * * Otherwise we need to determine if we have the required amount * of data (determined by the @data pointer and the size of the * largest base type we can encounter (represented by * BTF_SHOW_OBJ_BASE_TYPE_SIZE). Having that much data ensures * that we will be able to print some of the current object, * and if more is needed a copy will be triggered. * Some objects such as structs will not fit into the buffer; * in such cases additional copies when we iterate over their * members may be needed. * * btf_show_obj_safe() is used to return a safe buffer for * btf_show_start_type(); this ensures that as we recurse into * nested types we always have safe data for the given type. * This approach is somewhat wasteful; it's possible for example * that when iterating over a large union we'll end up copying the * same data repeatedly, but the goal is safety not performance. * We use stack data as opposed to per-CPU buffers because the * iteration over a type can take some time, and preemption handling * would greatly complicate use of the safe buffer. */ static void *btf_show_obj_safe(struct btf_show *show, const struct btf_type *t, void *data) { const struct btf_type *rt; int size_left, size; void *safe = NULL; if (show->flags & BTF_SHOW_UNSAFE) return data; rt = btf_resolve_size(show->btf, t, &size); if (IS_ERR(rt)) { show->state.status = PTR_ERR(rt); return NULL; } /* * Is this toplevel object? If so, set total object size and * initialize pointers. Otherwise check if we still fall within * our safe object data. */ if (show->state.depth == 0) { show->obj.size = size; show->obj.head = data; } else { /* * If the size of the current object is > our remaining * safe buffer we _may_ need to do a new copy. However * consider the case of a nested struct; it's size pushes * us over the safe buffer limit, but showing any individual * struct members does not. In such cases, we don't need * to initiate a fresh copy yet; however we definitely need * at least BTF_SHOW_OBJ_BASE_TYPE_SIZE bytes left * in our buffer, regardless of the current object size. * The logic here is that as we resolve types we will * hit a base type at some point, and we need to be sure * the next chunk of data is safely available to display * that type info safely. We cannot rely on the size of * the current object here because it may be much larger * than our current buffer (e.g. task_struct is 8k). * All we want to do here is ensure that we can print the * next basic type, which we can if either * - the current type size is within the safe buffer; or * - at least BTF_SHOW_OBJ_BASE_TYPE_SIZE bytes are left in * the safe buffer. */ safe = __btf_show_obj_safe(show, data, min(size, BTF_SHOW_OBJ_BASE_TYPE_SIZE)); } /* * We need a new copy to our safe object, either because we haven't * yet copied and are initializing safe data, or because the data * we want falls outside the boundaries of the safe object. */ if (!safe) { size_left = btf_show_obj_size_left(show, data); if (size_left > BTF_SHOW_OBJ_SAFE_SIZE) size_left = BTF_SHOW_OBJ_SAFE_SIZE; show->state.status = copy_from_kernel_nofault(show->obj.safe, data, size_left); if (!show->state.status) { show->obj.data = data; safe = show->obj.safe; } } return safe; } /* * Set the type we are starting to show and return a safe data pointer * to be used for showing the associated data. */ static void *btf_show_start_type(struct btf_show *show, const struct btf_type *t, u32 type_id, void *data) { show->state.type = t; show->state.type_id = type_id; show->state.name[0] = '\0'; return btf_show_obj_safe(show, t, data); } static void btf_show_end_type(struct btf_show *show) { show->state.type = NULL; show->state.type_id = 0; show->state.name[0] = '\0'; } static void *btf_show_start_aggr_type(struct btf_show *show, const struct btf_type *t, u32 type_id, void *data) { void *safe_data = btf_show_start_type(show, t, type_id, data); if (!safe_data) return safe_data; btf_show(show, "%s%s%s", btf_show_indent(show), btf_show_name(show), btf_show_newline(show)); show->state.depth++; return safe_data; } static void btf_show_end_aggr_type(struct btf_show *show, const char *suffix) { show->state.depth--; btf_show(show, "%s%s%s%s", btf_show_indent(show), suffix, btf_show_delim(show), btf_show_newline(show)); btf_show_end_type(show); } static void btf_show_start_member(struct btf_show *show, const struct btf_member *m) { show->state.member = m; } static void btf_show_start_array_member(struct btf_show *show) { show->state.array_member = 1; btf_show_start_member(show, NULL); } static void btf_show_end_member(struct btf_show *show) { show->state.member = NULL; } static void btf_show_end_array_member(struct btf_show *show) { show->state.array_member = 0; btf_show_end_member(show); } static void *btf_show_start_array_type(struct btf_show *show, const struct btf_type *t, u32 type_id, u16 array_encoding, void *data) { show->state.array_encoding = array_encoding; show->state.array_terminated = 0; return btf_show_start_aggr_type(show, t, type_id, data); } static void btf_show_end_array_type(struct btf_show *show) { show->state.array_encoding = 0; show->state.array_terminated = 0; btf_show_end_aggr_type(show, "]"); } static void *btf_show_start_struct_type(struct btf_show *show, const struct btf_type *t, u32 type_id, void *data) { return btf_show_start_aggr_type(show, t, type_id, data); } static void btf_show_end_struct_type(struct btf_show *show) { btf_show_end_aggr_type(show, "}"); } __printf(2, 3) static void __btf_verifier_log(struct bpf_verifier_log *log, const char *fmt, ...) { va_list args; va_start(args, fmt); bpf_verifier_vlog(log, fmt, args); va_end(args); } __printf(2, 3) static void btf_verifier_log(struct btf_verifier_env *env, const char *fmt, ...) { struct bpf_verifier_log *log = &env->log; va_list args; if (!bpf_verifier_log_needed(log)) return; va_start(args, fmt); bpf_verifier_vlog(log, fmt, args); va_end(args); } __printf(4, 5) static void __btf_verifier_log_type(struct btf_verifier_env *env, const struct btf_type *t, bool log_details, const char *fmt, ...) { struct bpf_verifier_log *log = &env->log; struct btf *btf = env->btf; va_list args; if (!bpf_verifier_log_needed(log)) return; if (log->level == BPF_LOG_KERNEL) { /* btf verifier prints all types it is processing via * btf_verifier_log_type(..., fmt = NULL). * Skip those prints for in-kernel BTF verification. */ if (!fmt) return; /* Skip logging when loading module BTF with mismatches permitted */ if (env->btf->base_btf && IS_ENABLED(CONFIG_MODULE_ALLOW_BTF_MISMATCH)) return; } __btf_verifier_log(log, "[%u] %s %s%s", env->log_type_id, btf_type_str(t), __btf_name_by_offset(btf, t->name_off), log_details ? " " : ""); if (log_details) btf_type_ops(t)->log_details(env, t); if (fmt && *fmt) { __btf_verifier_log(log, " "); va_start(args, fmt); bpf_verifier_vlog(log, fmt, args); va_end(args); } __btf_verifier_log(log, "\n"); } #define btf_verifier_log_type(env, t, ...) \ __btf_verifier_log_type((env), (t), true, __VA_ARGS__) #define btf_verifier_log_basic(env, t, ...) \ __btf_verifier_log_type((env), (t), false, __VA_ARGS__) __printf(4, 5) static void btf_verifier_log_member(struct btf_verifier_env *env, const struct btf_type *struct_type, const struct btf_member *member, const char *fmt, ...) { struct bpf_verifier_log *log = &env->log; struct btf *btf = env->btf; va_list args; if (!bpf_verifier_log_needed(log)) return; if (log->level == BPF_LOG_KERNEL) { if (!fmt) return; /* Skip logging when loading module BTF with mismatches permitted */ if (env->btf->base_btf && IS_ENABLED(CONFIG_MODULE_ALLOW_BTF_MISMATCH)) return; } /* The CHECK_META phase already did a btf dump. * * If member is logged again, it must hit an error in * parsing this member. It is useful to print out which * struct this member belongs to. */ if (env->phase != CHECK_META) btf_verifier_log_type(env, struct_type, NULL); if (btf_type_kflag(struct_type)) __btf_verifier_log(log, "\t%s type_id=%u bitfield_size=%u bits_offset=%u", __btf_name_by_offset(btf, member->name_off), member->type, BTF_MEMBER_BITFIELD_SIZE(member->offset), BTF_MEMBER_BIT_OFFSET(member->offset)); else __btf_verifier_log(log, "\t%s type_id=%u bits_offset=%u", __btf_name_by_offset(btf, member->name_off), member->type, member->offset); if (fmt && *fmt) { __btf_verifier_log(log, " "); va_start(args, fmt); bpf_verifier_vlog(log, fmt, args); va_end(args); } __btf_verifier_log(log, "\n"); } __printf(4, 5) static void btf_verifier_log_vsi(struct btf_verifier_env *env, const struct btf_type *datasec_type, const struct btf_var_secinfo *vsi, const char *fmt, ...) { struct bpf_verifier_log *log = &env->log; va_list args; if (!bpf_verifier_log_needed(log)) return; if (log->level == BPF_LOG_KERNEL && !fmt) return; if (env->phase != CHECK_META) btf_verifier_log_type(env, datasec_type, NULL); __btf_verifier_log(log, "\t type_id=%u offset=%u size=%u", vsi->type, vsi->offset, vsi->size); if (fmt && *fmt) { __btf_verifier_log(log, " "); va_start(args, fmt); bpf_verifier_vlog(log, fmt, args); va_end(args); } __btf_verifier_log(log, "\n"); } static void btf_verifier_log_hdr(struct btf_verifier_env *env, u32 btf_data_size) { struct bpf_verifier_log *log = &env->log; const struct btf *btf = env->btf; const struct btf_header *hdr; if (!bpf_verifier_log_needed(log)) return; if (log->level == BPF_LOG_KERNEL) return; hdr = &btf->hdr; __btf_verifier_log(log, "magic: 0x%x\n", hdr->magic); __btf_verifier_log(log, "version: %u\n", hdr->version); __btf_verifier_log(log, "flags: 0x%x\n", hdr->flags); __btf_verifier_log(log, "hdr_len: %u\n", hdr->hdr_len); __btf_verifier_log(log, "type_off: %u\n", hdr->type_off); __btf_verifier_log(log, "type_len: %u\n", hdr->type_len); __btf_verifier_log(log, "str_off: %u\n", hdr->str_off); __btf_verifier_log(log, "str_len: %u\n", hdr->str_len); __btf_verifier_log(log, "btf_total_size: %u\n", btf_data_size); } static int btf_add_type(struct btf_verifier_env *env, struct btf_type *t) { struct btf *btf = env->btf; if (btf->types_size == btf->nr_types) { /* Expand 'types' array */ struct btf_type **new_types; u32 expand_by, new_size; if (btf->start_id + btf->types_size == BTF_MAX_TYPE) { btf_verifier_log(env, "Exceeded max num of types"); return -E2BIG; } expand_by = max_t(u32, btf->types_size >> 2, 16); new_size = min_t(u32, BTF_MAX_TYPE, btf->types_size + expand_by); new_types = kvcalloc(new_size, sizeof(*new_types), GFP_KERNEL | __GFP_NOWARN); if (!new_types) return -ENOMEM; if (btf->nr_types == 0) { if (!btf->base_btf) { /* lazily init VOID type */ new_types[0] = &btf_void; btf->nr_types++; } } else { memcpy(new_types, btf->types, sizeof(*btf->types) * btf->nr_types); } kvfree(btf->types); btf->types = new_types; btf->types_size = new_size; } btf->types[btf->nr_types++] = t; return 0; } static int btf_alloc_id(struct btf *btf) { int id; idr_preload(GFP_KERNEL); spin_lock_bh(&btf_idr_lock); id = idr_alloc_cyclic(&btf_idr, btf, 1, INT_MAX, GFP_ATOMIC); if (id > 0) btf->id = id; spin_unlock_bh(&btf_idr_lock); idr_preload_end(); if (WARN_ON_ONCE(!id)) return -ENOSPC; return id > 0 ? 0 : id; } static void btf_free_id(struct btf *btf) { unsigned long flags; /* * In map-in-map, calling map_delete_elem() on outer * map will call bpf_map_put on the inner map. * It will then eventually call btf_free_id() * on the inner map. Some of the map_delete_elem() * implementation may have irq disabled, so * we need to use the _irqsave() version instead * of the _bh() version. */ spin_lock_irqsave(&btf_idr_lock, flags); idr_remove(&btf_idr, btf->id); spin_unlock_irqrestore(&btf_idr_lock, flags); } static void btf_free_kfunc_set_tab(struct btf *btf) { struct btf_kfunc_set_tab *tab = btf->kfunc_set_tab; int hook; if (!tab) return; for (hook = 0; hook < ARRAY_SIZE(tab->sets); hook++) kfree(tab->sets[hook]); kfree(tab); btf->kfunc_set_tab = NULL; } static void btf_free_dtor_kfunc_tab(struct btf *btf) { struct btf_id_dtor_kfunc_tab *tab = btf->dtor_kfunc_tab; if (!tab) return; kfree(tab); btf->dtor_kfunc_tab = NULL; } static void btf_struct_metas_free(struct btf_struct_metas *tab) { int i; if (!tab) return; for (i = 0; i < tab->cnt; i++) btf_record_free(tab->types[i].record); kfree(tab); } static void btf_free_struct_meta_tab(struct btf *btf) { struct btf_struct_metas *tab = btf->struct_meta_tab; btf_struct_metas_free(tab); btf->struct_meta_tab = NULL; } static void btf_free_struct_ops_tab(struct btf *btf) { struct btf_struct_ops_tab *tab = btf->struct_ops_tab; u32 i; if (!tab) return; for (i = 0; i < tab->cnt; i++) bpf_struct_ops_desc_release(&tab->ops[i]); kfree(tab); btf->struct_ops_tab = NULL; } static void btf_free(struct btf *btf) { btf_free_struct_meta_tab(btf); btf_free_dtor_kfunc_tab(btf); btf_free_kfunc_set_tab(btf); btf_free_struct_ops_tab(btf); kvfree(btf->types); kvfree(btf->resolved_sizes); kvfree(btf->resolved_ids); /* vmlinux does not allocate btf->data, it simply points it at * __start_BTF. */ if (!btf_is_vmlinux(btf)) kvfree(btf->data); kvfree(btf->base_id_map); kfree(btf); } static void btf_free_rcu(struct rcu_head *rcu) { struct btf *btf = container_of(rcu, struct btf, rcu); btf_free(btf); } const char *btf_get_name(const struct btf *btf) { return btf->name; } void btf_get(struct btf *btf) { refcount_inc(&btf->refcnt); } void btf_put(struct btf *btf) { if (btf && refcount_dec_and_test(&btf->refcnt)) { btf_free_id(btf); call_rcu(&btf->rcu, btf_free_rcu); } } struct btf *btf_base_btf(const struct btf *btf) { return btf->base_btf; } const struct btf_header *btf_header(const struct btf *btf) { return &btf->hdr; } void btf_set_base_btf(struct btf *btf, const struct btf *base_btf) { btf->base_btf = (struct btf *)base_btf; btf->start_id = btf_nr_types(base_btf); btf->start_str_off = base_btf->hdr.str_len; } static int env_resolve_init(struct btf_verifier_env *env) { struct btf *btf = env->btf; u32 nr_types = btf->nr_types; u32 *resolved_sizes = NULL; u32 *resolved_ids = NULL; u8 *visit_states = NULL; resolved_sizes = kvcalloc(nr_types, sizeof(*resolved_sizes), GFP_KERNEL | __GFP_NOWARN); if (!resolved_sizes) goto nomem; resolved_ids = kvcalloc(nr_types, sizeof(*resolved_ids), GFP_KERNEL | __GFP_NOWARN); if (!resolved_ids) goto nomem; visit_states = kvcalloc(nr_types, sizeof(*visit_states), GFP_KERNEL | __GFP_NOWARN); if (!visit_states) goto nomem; btf->resolved_sizes = resolved_sizes; btf->resolved_ids = resolved_ids; env->visit_states = visit_states; return 0; nomem: kvfree(resolved_sizes); kvfree(resolved_ids); kvfree(visit_states); return -ENOMEM; } static void btf_verifier_env_free(struct btf_verifier_env *env) { kvfree(env->visit_states); kfree(env); } static bool env_type_is_resolve_sink(const struct btf_verifier_env *env, const struct btf_type *next_type) { switch (env->resolve_mode) { case RESOLVE_TBD: /* int, enum or void is a sink */ return !btf_type_needs_resolve(next_type); case RESOLVE_PTR: /* int, enum, void, struct, array, func or func_proto is a sink * for ptr */ return !btf_type_is_modifier(next_type) && !btf_type_is_ptr(next_type); case RESOLVE_STRUCT_OR_ARRAY: /* int, enum, void, ptr, func or func_proto is a sink * for struct and array */ return !btf_type_is_modifier(next_type) && !btf_type_is_array(next_type) && !btf_type_is_struct(next_type); default: BUG(); } } static bool env_type_is_resolved(const struct btf_verifier_env *env, u32 type_id) { /* base BTF types should be resolved by now */ if (type_id < env->btf->start_id) return true; return env->visit_states[type_id - env->btf->start_id] == RESOLVED; } static int env_stack_push(struct btf_verifier_env *env, const struct btf_type *t, u32 type_id) { const struct btf *btf = env->btf; struct resolve_vertex *v; if (env->top_stack == MAX_RESOLVE_DEPTH) return -E2BIG; if (type_id < btf->start_id || env->visit_states[type_id - btf->start_id] != NOT_VISITED) return -EEXIST; env->visit_states[type_id - btf->start_id] = VISITED; v = &env->stack[env->top_stack++]; v->t = t; v->type_id = type_id; v->next_member = 0; if (env->resolve_mode == RESOLVE_TBD) { if (btf_type_is_ptr(t)) env->resolve_mode = RESOLVE_PTR; else if (btf_type_is_struct(t) || btf_type_is_array(t)) env->resolve_mode = RESOLVE_STRUCT_OR_ARRAY; } return 0; } static void env_stack_set_next_member(struct btf_verifier_env *env, u16 next_member) { env->stack[env->top_stack - 1].next_member = next_member; } static void env_stack_pop_resolved(struct btf_verifier_env *env, u32 resolved_type_id, u32 resolved_size) { u32 type_id = env->stack[--(env->top_stack)].type_id; struct btf *btf = env->btf; type_id -= btf->start_id; /* adjust to local type id */ btf->resolved_sizes[type_id] = resolved_size; btf->resolved_ids[type_id] = resolved_type_id; env->visit_states[type_id] = RESOLVED; } static const struct resolve_vertex *env_stack_peak(struct btf_verifier_env *env) { return env->top_stack ? &env->stack[env->top_stack - 1] : NULL; } /* Resolve the size of a passed-in "type" * * type: is an array (e.g. u32 array[x][y]) * return type: type "u32[x][y]", i.e. BTF_KIND_ARRAY, * *type_size: (x * y * sizeof(u32)). Hence, *type_size always * corresponds to the return type. * *elem_type: u32 * *elem_id: id of u32 * *total_nelems: (x * y). Hence, individual elem size is * (*type_size / *total_nelems) * *type_id: id of type if it's changed within the function, 0 if not * * type: is not an array (e.g. const struct X) * return type: type "struct X" * *type_size: sizeof(struct X) * *elem_type: same as return type ("struct X") * *elem_id: 0 * *total_nelems: 1 * *type_id: id of type if it's changed within the function, 0 if not */ static const struct btf_type * __btf_resolve_size(const struct btf *btf, const struct btf_type *type, u32 *type_size, const struct btf_type **elem_type, u32 *elem_id, u32 *total_nelems, u32 *type_id) { const struct btf_type *array_type = NULL; const struct btf_array *array = NULL; u32 i, size, nelems = 1, id = 0; for (i = 0; i < MAX_RESOLVE_DEPTH; i++) { switch (BTF_INFO_KIND(type->info)) { /* type->size can be used */ case BTF_KIND_INT: case BTF_KIND_STRUCT: case BTF_KIND_UNION: case BTF_KIND_ENUM: case BTF_KIND_FLOAT: case BTF_KIND_ENUM64: size = type->size; goto resolved; case BTF_KIND_PTR: size = sizeof(void *); goto resolved; /* Modifiers */ case BTF_KIND_TYPEDEF: case BTF_KIND_VOLATILE: case BTF_KIND_CONST: case BTF_KIND_RESTRICT: case BTF_KIND_TYPE_TAG: id = type->type; type = btf_type_by_id(btf, type->type); break; case BTF_KIND_ARRAY: if (!array_type) array_type = type; array = btf_type_array(type); if (nelems && array->nelems > U32_MAX / nelems) return ERR_PTR(-EINVAL); nelems *= array->nelems; type = btf_type_by_id(btf, array->type); break; /* type without size */ default: return ERR_PTR(-EINVAL); } } return ERR_PTR(-EINVAL); resolved: if (nelems && size > U32_MAX / nelems) return ERR_PTR(-EINVAL); *type_size = nelems * size; if (total_nelems) *total_nelems = nelems; if (elem_type) *elem_type = type; if (elem_id) *elem_id = array ? array->type : 0; if (type_id && id) *type_id = id; return array_type ? : type; } const struct btf_type * btf_resolve_size(const struct btf *btf, const struct btf_type *type, u32 *type_size) { return __btf_resolve_size(btf, type, type_size, NULL, NULL, NULL, NULL); } static u32 btf_resolved_type_id(const struct btf *btf, u32 type_id) { while (type_id < btf->start_id) btf = btf->base_btf; return btf->resolved_ids[type_id - btf->start_id]; } /* The input param "type_id" must point to a needs_resolve type */ static const struct btf_type *btf_type_id_resolve(const struct btf *btf, u32 *type_id) { *type_id = btf_resolved_type_id(btf, *type_id); return btf_type_by_id(btf, *type_id); } static u32 btf_resolved_type_size(const struct btf *btf, u32 type_id) { while (type_id < btf->start_id) btf = btf->base_btf; return btf->resolved_sizes[type_id - btf->start_id]; } const struct btf_type *btf_type_id_size(const struct btf *btf, u32 *type_id, u32 *ret_size) { const struct btf_type *size_type; u32 size_type_id = *type_id; u32 size = 0; size_type = btf_type_by_id(btf, size_type_id); if (btf_type_nosize_or_null(size_type)) return NULL; if (btf_type_has_size(size_type)) { size = size_type->size; } else if (btf_type_is_array(size_type)) { size = btf_resolved_type_size(btf, size_type_id); } else if (btf_type_is_ptr(size_type)) { size = sizeof(void *); } else { if (WARN_ON_ONCE(!btf_type_is_modifier(size_type) && !btf_type_is_var(size_type))) return NULL; size_type_id = btf_resolved_type_id(btf, size_type_id); size_type = btf_type_by_id(btf, size_type_id); if (btf_type_nosize_or_null(size_type)) return NULL; else if (btf_type_has_size(size_type)) size = size_type->size; else if (btf_type_is_array(size_type)) size = btf_resolved_type_size(btf, size_type_id); else if (btf_type_is_ptr(size_type)) size = sizeof(void *); else return NULL; } *type_id = size_type_id; if (ret_size) *ret_size = size; return size_type; } static int btf_df_check_member(struct btf_verifier_env *env, const struct btf_type *struct_type, const struct btf_member *member, const struct btf_type *member_type) { btf_verifier_log_basic(env, struct_type, "Unsupported check_member"); return -EINVAL; } static int btf_df_check_kflag_member(struct btf_verifier_env *env, const struct btf_type *struct_type, const struct btf_member *member, const struct btf_type *member_type) { btf_verifier_log_basic(env, struct_type, "Unsupported check_kflag_member"); return -EINVAL; } /* Used for ptr, array struct/union and float type members. * int, enum and modifier types have their specific callback functions. */ static int btf_generic_check_kflag_member(struct btf_verifier_env *env, const struct btf_type *struct_type, const struct btf_member *member, const struct btf_type *member_type) { if (BTF_MEMBER_BITFIELD_SIZE(member->offset)) { btf_verifier_log_member(env, struct_type, member, "Invalid member bitfield_size"); return -EINVAL; } /* bitfield size is 0, so member->offset represents bit offset only. * It is safe to call non kflag check_member variants. */ return btf_type_ops(member_type)->check_member(env, struct_type, member, member_type); } static int btf_df_resolve(struct btf_verifier_env *env, const struct resolve_vertex *v) { btf_verifier_log_basic(env, v->t, "Unsupported resolve"); return -EINVAL; } static void btf_df_show(const struct btf *btf, const struct btf_type *t, u32 type_id, void *data, u8 bits_offsets, struct btf_show *show) { btf_show(show, "<unsupported kind:%u>", BTF_INFO_KIND(t->info)); } static int btf_int_check_member(struct btf_verifier_env *env, const struct btf_type *struct_type, const struct btf_member *member, const struct btf_type *member_type) { u32 int_data = btf_type_int(member_type); u32 struct_bits_off = member->offset; u32 struct_size = struct_type->size; u32 nr_copy_bits; u32 bytes_offset; if (U32_MAX - struct_bits_off < BTF_INT_OFFSET(int_data)) { btf_verifier_log_member(env, struct_type, member, "bits_offset exceeds U32_MAX"); return -EINVAL; } struct_bits_off += BTF_INT_OFFSET(int_data); bytes_offset = BITS_ROUNDDOWN_BYTES(struct_bits_off); nr_copy_bits = BTF_INT_BITS(int_data) + BITS_PER_BYTE_MASKED(struct_bits_off); if (nr_copy_bits > BITS_PER_U128) { btf_verifier_log_member(env, struct_type, member, "nr_copy_bits exceeds 128"); return -EINVAL; } if (struct_size < bytes_offset || struct_size - bytes_offset < BITS_ROUNDUP_BYTES(nr_copy_bits)) { btf_verifier_log_member(env, struct_type, member, "Member exceeds struct_size"); return -EINVAL; } return 0; } static int btf_int_check_kflag_member(struct btf_verifier_env *env, const struct btf_type *struct_type, const struct btf_member *member, const struct btf_type *member_type) { u32 struct_bits_off, nr_bits, nr_int_data_bits, bytes_offset; u32 int_data = btf_type_int(member_type); u32 struct_size = struct_type->size; u32 nr_copy_bits; /* a regular int type is required for the kflag int member */ if (!btf_type_int_is_regular(member_type)) { btf_verifier_log_member(env, struct_type, member, "Invalid member base type"); return -EINVAL; } /* check sanity of bitfield size */ nr_bits = BTF_MEMBER_BITFIELD_SIZE(member->offset); struct_bits_off = BTF_MEMBER_BIT_OFFSET(member->offset); nr_int_data_bits = BTF_INT_BITS(int_data); if (!nr_bits) { /* Not a bitfield member, member offset must be at byte * boundary. */ if (BITS_PER_BYTE_MASKED(struct_bits_off)) { btf_verifier_log_member(env, struct_type, member, "Invalid member offset"); return -EINVAL; } nr_bits = nr_int_data_bits; } else if (nr_bits > nr_int_data_bits) { btf_verifier_log_member(env, struct_type, member, "Invalid member bitfield_size"); return -EINVAL; } bytes_offset = BITS_ROUNDDOWN_BYTES(struct_bits_off); nr_copy_bits = nr_bits + BITS_PER_BYTE_MASKED(struct_bits_off); if (nr_copy_bits > BITS_PER_U128) { btf_verifier_log_member(env, struct_type, member, "nr_copy_bits exceeds 128"); return -EINVAL; } if (struct_size < bytes_offset || struct_size - bytes_offset < BITS_ROUNDUP_BYTES(nr_copy_bits)) { btf_verifier_log_member(env, struct_type, member, "Member exceeds struct_size"); return -EINVAL; } return 0; } static s32 btf_int_check_meta(struct btf_verifier_env *env, const struct btf_type *t, u32 meta_left) { u32 int_data, nr_bits, meta_needed = sizeof(int_data); u16 encoding; if (meta_left < meta_needed) { btf_verifier_log_basic(env, t, "meta_left:%u meta_needed:%u", meta_left, meta_needed); return -EINVAL; } if (btf_type_vlen(t)) { btf_verifier_log_type(env, t, "vlen != 0"); return -EINVAL; } if (btf_type_kflag(t)) { btf_verifier_log_type(env, t, "Invalid btf_info kind_flag"); return -EINVAL; } int_data = btf_type_int(t); if (int_data & ~BTF_INT_MASK) { btf_verifier_log_basic(env, t, "Invalid int_data:%x", int_data); return -EINVAL; } nr_bits = BTF_INT_BITS(int_data) + BTF_INT_OFFSET(int_data); if (nr_bits > BITS_PER_U128) { btf_verifier_log_type(env, t, "nr_bits exceeds %zu", BITS_PER_U128); return -EINVAL; } if (BITS_ROUNDUP_BYTES(nr_bits) > t->size) { btf_verifier_log_type(env, t, "nr_bits exceeds type_size"); return -EINVAL; } /* * Only one of the encoding bits is allowed and it * should be sufficient for the pretty print purpose (i.e. decoding). * Multiple bits can be allowed later if it is found * to be insufficient. */ encoding = BTF_INT_ENCODING(int_data); if (encoding && encoding != BTF_INT_SIGNED && encoding != BTF_INT_CHAR && encoding != BTF_INT_BOOL) { btf_verifier_log_type(env, t, "Unsupported encoding"); return -ENOTSUPP; } btf_verifier_log_type(env, t, NULL); return meta_needed; } static void btf_int_log(struct btf_verifier_env *env, const struct btf_type *t) { int int_data = btf_type_int(t); btf_verifier_log(env, "size=%u bits_offset=%u nr_bits=%u encoding=%s", t->size, BTF_INT_OFFSET(int_data), BTF_INT_BITS(int_data), btf_int_encoding_str(BTF_INT_ENCODING(int_data))); } static void btf_int128_print(struct btf_show *show, void *data) { /* data points to a __int128 number. * Suppose * int128_num = *(__int128 *)data; * The below formulas shows what upper_num and lower_num represents: * upper_num = int128_num >> 64; * lower_num = int128_num & 0xffffffffFFFFFFFFULL; */ u64 upper_num, lower_num; #ifdef __BIG_ENDIAN_BITFIELD upper_num = *(u64 *)data; lower_num = *(u64 *)(data + 8); #else upper_num = *(u64 *)(data + 8); lower_num = *(u64 *)data; #endif if (upper_num == 0) btf_show_type_value(show, "0x%llx", lower_num); else btf_show_type_values(show, "0x%llx%016llx", upper_num, lower_num); } static void btf_int128_shift(u64 *print_num, u16 left_shift_bits, u16 right_shift_bits) { u64 upper_num, lower_num; #ifdef __BIG_ENDIAN_BITFIELD upper_num = print_num[0]; lower_num = print_num[1]; #else upper_num = print_num[1]; lower_num = print_num[0]; #endif /* shake out un-needed bits by shift/or operations */ if (left_shift_bits >= 64) { upper_num = lower_num << (left_shift_bits - 64); lower_num = 0; } else { upper_num = (upper_num << left_shift_bits) | (lower_num >> (64 - left_shift_bits)); lower_num = lower_num << left_shift_bits; } if (right_shift_bits >= 64) { lower_num = upper_num >> (right_shift_bits - 64); upper_num = 0; } else { lower_num = (lower_num >> right_shift_bits) | (upper_num << (64 - right_shift_bits)); upper_num = upper_num >> right_shift_bits; } #ifdef __BIG_ENDIAN_BITFIELD print_num[0] = upper_num; print_num[1] = lower_num; #else print_num[0] = lower_num; print_num[1] = upper_num; #endif } static void btf_bitfield_show(void *data, u8 bits_offset, u8 nr_bits, struct btf_show *show) { u16 left_shift_bits, right_shift_bits; u8 nr_copy_bytes; u8 nr_copy_bits; u64 print_num[2] = {}; nr_copy_bits = nr_bits + bits_offset; nr_copy_bytes = BITS_ROUNDUP_BYTES(nr_copy_bits); memcpy(print_num, data, nr_copy_bytes); #ifdef __BIG_ENDIAN_BITFIELD left_shift_bits = bits_offset; #else left_shift_bits = BITS_PER_U128 - nr_copy_bits; #endif right_shift_bits = BITS_PER_U128 - nr_bits; btf_int128_shift(print_num, left_shift_bits, right_shift_bits); btf_int128_print(show, print_num); } static void btf_int_bits_show(const struct btf *btf, const struct btf_type *t, void *data, u8 bits_offset, struct btf_show *show) { u32 int_data = btf_type_int(t); u8 nr_bits = BTF_INT_BITS(int_data); u8 total_bits_offset; /* * bits_offset is at most 7. * BTF_INT_OFFSET() cannot exceed 128 bits. */ total_bits_offset = bits_offset + BTF_INT_OFFSET(int_data); data += BITS_ROUNDDOWN_BYTES(total_bits_offset); bits_offset = BITS_PER_BYTE_MASKED(total_bits_offset); btf_bitfield_show(data, bits_offset, nr_bits, show); } static void btf_int_show(const struct btf *btf, const struct btf_type *t, u32 type_id, void *data, u8 bits_offset, struct btf_show *show) { u32 int_data = btf_type_int(t); u8 encoding = BTF_INT_ENCODING(int_data); bool sign = encoding & BTF_INT_SIGNED; u8 nr_bits = BTF_INT_BITS(int_data); void *safe_data; safe_data = btf_show_start_type(show, t, type_id, data); if (!safe_data) return; if (bits_offset || BTF_INT_OFFSET(int_data) || BITS_PER_BYTE_MASKED(nr_bits)) { btf_int_bits_show(btf, t, safe_data, bits_offset, show); goto out; } switch (nr_bits) { case 128: btf_int128_print(show, safe_data); break; case 64: if (sign) btf_show_type_value(show, "%lld", *(s64 *)safe_data); else btf_show_type_value(show, "%llu", *(u64 *)safe_data); break; case 32: if (sign) btf_show_type_value(show, "%d", *(s32 *)safe_data); else btf_show_type_value(show, "%u", *(u32 *)safe_data); break; case 16: if (sign) btf_show_type_value(show, "%d", *(s16 *)safe_data); else btf_show_type_value(show, "%u", *(u16 *)safe_data); break; case 8: if (show->state.array_encoding == BTF_INT_CHAR) { /* check for null terminator */ if (show->state.array_terminated) break; if (*(char *)data == '\0') { show->state.array_terminated = 1; break; } if (isprint(*(char *)data)) { btf_show_type_value(show, "'%c'", *(char *)safe_data); break; } } if (sign) btf_show_type_value(show, "%d", *(s8 *)safe_data); else btf_show_type_value(show, "%u", *(u8 *)safe_data); break; default: btf_int_bits_show(btf, t, safe_data, bits_offset, show); break; } out: btf_show_end_type(show); } static const struct btf_kind_operations int_ops = { .check_meta = btf_int_check_meta, .resolve = btf_df_resolve, .check_member = btf_int_check_member, .check_kflag_member = btf_int_check_kflag_member, .log_details = btf_int_log, .show = btf_int_show, }; static int btf_modifier_check_member(struct btf_verifier_env *env, const struct btf_type *struct_type, const struct btf_member *member, const struct btf_type *member_type) { const struct btf_type *resolved_type; u32 resolved_type_id = member->type; struct btf_member resolved_member; struct btf *btf = env->btf; resolved_type = btf_type_id_size(btf, &resolved_type_id, NULL); if (!resolved_type) { btf_verifier_log_member(env, struct_type, member, "Invalid member"); return -EINVAL; } resolved_member = *member; resolved_member.type = resolved_type_id; return btf_type_ops(resolved_type)->check_member(env, struct_type, &resolved_member, resolved_type); } static int btf_modifier_check_kflag_member(struct btf_verifier_env *env, const struct btf_type *struct_type, const struct btf_member *member, const struct btf_type *member_type) { const struct btf_type *resolved_type; u32 resolved_type_id = member->type; struct btf_member resolved_member; struct btf *btf = env->btf; resolved_type = btf_type_id_size(btf, &resolved_type_id, NULL); if (!resolved_type) { btf_verifier_log_member(env, struct_type, member, "Invalid member"); return -EINVAL; } resolved_member = *member; resolved_member.type = resolved_type_id; return btf_type_ops(resolved_type)->check_kflag_member(env, struct_type, &resolved_member, resolved_type); } static int btf_ptr_check_member(struct btf_verifier_env *env, const struct btf_type *struct_type, const struct btf_member *member, const struct btf_type *member_type) { u32 struct_size, struct_bits_off, bytes_offset; struct_size = struct_type->size; struct_bits_off = member->offset; bytes_offset = BITS_ROUNDDOWN_BYTES(struct_bits_off); if (BITS_PER_BYTE_MASKED(struct_bits_off)) { btf_verifier_log_member(env, struct_type, member, "Member is not byte aligned"); return -EINVAL; } if (struct_size - bytes_offset < sizeof(void *)) { btf_verifier_log_member(env, struct_type, member, "Member exceeds struct_size"); return -EINVAL; } return 0; } static int btf_ref_type_check_meta(struct btf_verifier_env *env, const struct btf_type *t, u32 meta_left) { const char *value; if (btf_type_vlen(t)) { btf_verifier_log_type(env, t, "vlen != 0"); return -EINVAL; } if (btf_type_kflag(t) && !btf_type_is_type_tag(t)) { btf_verifier_log_type(env, t, "Invalid btf_info kind_flag"); return -EINVAL; } if (!BTF_TYPE_ID_VALID(t->type)) { btf_verifier_log_type(env, t, "Invalid type_id"); return -EINVAL; } /* typedef/type_tag type must have a valid name, and other ref types, * volatile, const, restrict, should have a null name. */ if (BTF_INFO_KIND(t->info) == BTF_KIND_TYPEDEF) { if (!t->name_off || !btf_name_valid_identifier(env->btf, t->name_off)) { btf_verifier_log_type(env, t, "Invalid name"); return -EINVAL; } } else if (BTF_INFO_KIND(t->info) == BTF_KIND_TYPE_TAG) { value = btf_name_by_offset(env->btf, t->name_off); if (!value || !value[0]) { btf_verifier_log_type(env, t, "Invalid name"); return -EINVAL; } } else { if (t->name_off) { btf_verifier_log_type(env, t, "Invalid name"); return -EINVAL; } } btf_verifier_log_type(env, t, NULL); return 0; } static int btf_modifier_resolve(struct btf_verifier_env *env, const struct resolve_vertex *v) { const struct btf_type *t = v->t; const struct btf_type *next_type; u32 next_type_id = t->type; struct btf *btf = env->btf; next_type = btf_type_by_id(btf, next_type_id); if (!next_type || btf_type_is_resolve_source_only(next_type)) { btf_verifier_log_type(env, v->t, "Invalid type_id"); return -EINVAL; } if (!env_type_is_resolve_sink(env, next_type) && !env_type_is_resolved(env, next_type_id)) return env_stack_push(env, next_type, next_type_id); /* Figure out the resolved next_type_id with size. * They will be stored in the current modifier's * resolved_ids and resolved_sizes such that it can * save us a few type-following when we use it later (e.g. in * pretty print). */ if (!btf_type_id_size(btf, &next_type_id, NULL)) { if (env_type_is_resolved(env, next_type_id)) next_type = btf_type_id_resolve(btf, &next_type_id); /* "typedef void new_void", "const void"...etc */ if (!btf_type_is_void(next_type) && !btf_type_is_fwd(next_type) && !btf_type_is_func_proto(next_type)) { btf_verifier_log_type(env, v->t, "Invalid type_id"); return -EINVAL; } } env_stack_pop_resolved(env, next_type_id, 0); return 0; } static int btf_var_resolve(struct btf_verifier_env *env, const struct resolve_vertex *v) { const struct btf_type *next_type; const struct btf_type *t = v->t; u32 next_type_id = t->type; struct btf *btf = env->btf; next_type = btf_type_by_id(btf, next_type_id); if (!next_type || btf_type_is_resolve_source_only(next_type)) { btf_verifier_log_type(env, v->t, "Invalid type_id"); return -EINVAL; } if (!env_type_is_resolve_sink(env, next_type) && !env_type_is_resolved(env, next_type_id)) return env_stack_push(env, next_type, next_type_id); if (btf_type_is_modifier(next_type)) { const struct btf_type *resolved_type; u32 resolved_type_id; resolved_type_id = next_type_id; resolved_type = btf_type_id_resolve(btf, &resolved_type_id); if (btf_type_is_ptr(resolved_type) && !env_type_is_resolve_sink(env, resolved_type) && !env_type_is_resolved(env, resolved_type_id)) return env_stack_push(env, resolved_type, resolved_type_id); } /* We must resolve to something concrete at this point, no * forward types or similar that would resolve to size of * zero is allowed. */ if (!btf_type_id_size(btf, &next_type_id, NULL)) { btf_verifier_log_type(env, v->t, "Invalid type_id"); return -EINVAL; } env_stack_pop_resolved(env, next_type_id, 0); return 0; } static int btf_ptr_resolve(struct btf_verifier_env *env, const struct resolve_vertex *v) { const struct btf_type *next_type; const struct btf_type *t = v->t; u32 next_type_id = t->type; struct btf *btf = env->btf; next_type = btf_type_by_id(btf, next_type_id); if (!next_type || btf_type_is_resolve_source_only(next_type)) { btf_verifier_log_type(env, v->t, "Invalid type_id"); return -EINVAL; } if (!env_type_is_resolve_sink(env, next_type) && !env_type_is_resolved(env, next_type_id)) return env_stack_push(env, next_type, next_type_id); /* If the modifier was RESOLVED during RESOLVE_STRUCT_OR_ARRAY, * the modifier may have stopped resolving when it was resolved * to a ptr (last-resolved-ptr). * * We now need to continue from the last-resolved-ptr to * ensure the last-resolved-ptr will not referring back to * the current ptr (t). */ if (btf_type_is_modifier(next_type)) { const struct btf_type *resolved_type; u32 resolved_type_id; resolved_type_id = next_type_id; resolved_type = btf_type_id_resolve(btf, &resolved_type_id); if (btf_type_is_ptr(resolved_type) && !env_type_is_resolve_sink(env, resolved_type) && !env_type_is_resolved(env, resolved_type_id)) return env_stack_push(env, resolved_type, resolved_type_id); } if (!btf_type_id_size(btf, &next_type_id, NULL)) { if (env_type_is_resolved(env, next_type_id)) next_type = btf_type_id_resolve(btf, &next_type_id); if (!btf_type_is_void(next_type) && !btf_type_is_fwd(next_type) && !btf_type_is_func_proto(next_type)) { btf_verifier_log_type(env, v->t, "Invalid type_id"); return -EINVAL; } } env_stack_pop_resolved(env, next_type_id, 0); return 0; } static void btf_modifier_show(const struct btf *btf, const struct btf_type *t, u32 type_id, void *data, u8 bits_offset, struct btf_show *show) { if (btf->resolved_ids) t = btf_type_id_resolve(btf, &type_id); else t = btf_type_skip_modifiers(btf, type_id, NULL); btf_type_ops(t)->show(btf, t, type_id, data, bits_offset, show); } static void btf_var_show(const struct btf *btf, const struct btf_type *t, u32 type_id, void *data, u8 bits_offset, struct btf_show *show) { t = btf_type_id_resolve(btf, &type_id); btf_type_ops(t)->show(btf, t, type_id, data, bits_offset, show); } static void btf_ptr_show(const struct btf *btf, const struct btf_type *t, u32 type_id, void *data, u8 bits_offset, struct btf_show *show) { void *safe_data; safe_data = btf_show_start_type(show, t, type_id, data); if (!safe_data) return; /* It is a hashed value unless BTF_SHOW_PTR_RAW is specified */ if (show->flags & BTF_SHOW_PTR_RAW) btf_show_type_value(show, "0x%px", *(void **)safe_data); else btf_show_type_value(show, "0x%p", *(void **)safe_data); btf_show_end_type(show); } static void btf_ref_type_log(struct btf_verifier_env *env, const struct btf_type *t) { btf_verifier_log(env, "type_id=%u", t->type); } static const struct btf_kind_operations modifier_ops = { .check_meta = btf_ref_type_check_meta, .resolve = btf_modifier_resolve, .check_member = btf_modifier_check_member, .check_kflag_member = btf_modifier_check_kflag_member, .log_details = btf_ref_type_log, .show = btf_modifier_show, }; static const struct btf_kind_operations ptr_ops = { .check_meta = btf_ref_type_check_meta, .resolve = btf_ptr_resolve, .check_member = btf_ptr_check_member, .check_kflag_member = btf_generic_check_kflag_member, .log_details = btf_ref_type_log, .show = btf_ptr_show, }; static s32 btf_fwd_check_meta(struct btf_verifier_env *env, const struct btf_type *t, u32 meta_left) { if (btf_type_vlen(t)) { btf_verifier_log_type(env, t, "vlen != 0"); return -EINVAL; } if (t->type) { btf_verifier_log_type(env, t, "type != 0"); return -EINVAL; } /* fwd type must have a valid name */ if (!t->name_off || !btf_name_valid_identifier(env->btf, t->name_off)) { btf_verifier_log_type(env, t, "Invalid name"); return -EINVAL; } btf_verifier_log_type(env, t, NULL); return 0; } static void btf_fwd_type_log(struct btf_verifier_env *env, const struct btf_type *t) { btf_verifier_log(env, "%s", btf_type_kflag(t) ? "union" : "struct"); } static const struct btf_kind_operations fwd_ops = { .check_meta = btf_fwd_check_meta, .resolve = btf_df_resolve, .check_member = btf_df_check_member, .check_kflag_member = btf_df_check_kflag_member, .log_details = btf_fwd_type_log, .show = btf_df_show, }; static int btf_array_check_member(struct btf_verifier_env *env, const struct btf_type *struct_type, const struct btf_member *member, const struct btf_type *member_type) { u32 struct_bits_off = member->offset; u32 struct_size, bytes_offset; u32 array_type_id, array_size; struct btf *btf = env->btf; if (BITS_PER_BYTE_MASKED(struct_bits_off)) { btf_verifier_log_member(env, struct_type, member, "Member is not byte aligned"); return -EINVAL; } array_type_id = member->type; btf_type_id_size(btf, &array_type_id, &array_size); struct_size = struct_type->size; bytes_offset = BITS_ROUNDDOWN_BYTES(struct_bits_off); if (struct_size - bytes_offset < array_size) { btf_verifier_log_member(env, struct_type, member, "Member exceeds struct_size"); return -EINVAL; } return 0; } static s32 btf_array_check_meta(struct btf_verifier_env *env, const struct btf_type *t, u32 meta_left) { const struct btf_array *array = btf_type_array(t); u32 meta_needed = sizeof(*array); if (meta_left < meta_needed) { btf_verifier_log_basic(env, t, "meta_left:%u meta_needed:%u", meta_left, meta_needed); return -EINVAL; } /* array type should not have a name */ if (t->name_off) { btf_verifier_log_type(env, t, "Invalid name"); return -EINVAL; } if (btf_type_vlen(t)) { btf_verifier_log_type(env, t, "vlen != 0"); return -EINVAL; } if (btf_type_kflag(t)) { btf_verifier_log_type(env, t, "Invalid btf_info kind_flag"); return -EINVAL; } if (t->size) { btf_verifier_log_type(env, t, "size != 0"); return -EINVAL; } /* Array elem type and index type cannot be in type void, * so !array->type and !array->index_type are not allowed. */ if (!array->type || !BTF_TYPE_ID_VALID(array->type)) { btf_verifier_log_type(env, t, "Invalid elem"); return -EINVAL; } if (!array->index_type || !BTF_TYPE_ID_VALID(array->index_type)) { btf_verifier_log_type(env, t, "Invalid index"); return -EINVAL; } btf_verifier_log_type(env, t, NULL); return meta_needed; } static int btf_array_resolve(struct btf_verifier_env *env, const struct resolve_vertex *v) { const struct btf_array *array = btf_type_array(v->t); const struct btf_type *elem_type, *index_type; u32 elem_type_id, index_type_id; struct btf *btf = env->btf; u32 elem_size; /* Check array->index_type */ index_type_id = array->index_type; index_type = btf_type_by_id(btf, index_type_id); if (btf_type_nosize_or_null(index_type) || btf_type_is_resolve_source_only(index_type)) { btf_verifier_log_type(env, v->t, "Invalid index"); return -EINVAL; } if (!env_type_is_resolve_sink(env, index_type) && !env_type_is_resolved(env, index_type_id)) return env_stack_push(env, index_type, index_type_id); index_type = btf_type_id_size(btf, &index_type_id, NULL); if (!index_type || !btf_type_is_int(index_type) || !btf_type_int_is_regular(index_type)) { btf_verifier_log_type(env, v->t, "Invalid index"); return -EINVAL; } /* Check array->type */ elem_type_id = array->type; elem_type = btf_type_by_id(btf, elem_type_id); if (btf_type_nosize_or_null(elem_type) || btf_type_is_resolve_source_only(elem_type)) { btf_verifier_log_type(env, v->t, "Invalid elem"); return -EINVAL; } if (!env_type_is_resolve_sink(env, elem_type) && !env_type_is_resolved(env, elem_type_id)) return env_stack_push(env, elem_type, elem_type_id); elem_type = btf_type_id_size(btf, &elem_type_id, &elem_size); if (!elem_type) { btf_verifier_log_type(env, v->t, "Invalid elem"); return -EINVAL; } if (btf_type_is_int(elem_type) && !btf_type_int_is_regular(elem_type)) { btf_verifier_log_type(env, v->t, "Invalid array of int"); return -EINVAL; } if (array->nelems && elem_size > U32_MAX / array->nelems) { btf_verifier_log_type(env, v->t, "Array size overflows U32_MAX"); return -EINVAL; } env_stack_pop_resolved(env, elem_type_id, elem_size * array->nelems); return 0; } static void btf_array_log(struct btf_verifier_env *env, const struct btf_type *t) { const struct btf_array *array = btf_type_array(t); btf_verifier_log(env, "type_id=%u index_type_id=%u nr_elems=%u", array->type, array->index_type, array->nelems); } static void __btf_array_show(const struct btf *btf, const struct btf_type *t, u32 type_id, void *data, u8 bits_offset, struct btf_show *show) { const struct btf_array *array = btf_type_array(t); const struct btf_kind_operations *elem_ops; const struct btf_type *elem_type; u32 i, elem_size = 0, elem_type_id; u16 encoding = 0; elem_type_id = array->type; elem_type = btf_type_skip_modifiers(btf, elem_type_id, NULL); if (elem_type && btf_type_has_size(elem_type)) elem_size = elem_type->size; if (elem_type && btf_type_is_int(elem_type)) { u32 int_type = btf_type_int(elem_type); encoding = BTF_INT_ENCODING(int_type); /* * BTF_INT_CHAR encoding never seems to be set for * char arrays, so if size is 1 and element is * printable as a char, we'll do that. */ if (elem_size == 1) encoding = BTF_INT_CHAR; } if (!btf_show_start_array_type(show, t, type_id, encoding, data)) return; if (!elem_type) goto out; elem_ops = btf_type_ops(elem_type); for (i = 0; i < array->nelems; i++) { btf_show_start_array_member(show); elem_ops->show(btf, elem_type, elem_type_id, data, bits_offset, show); data += elem_size; btf_show_end_array_member(show); if (show->state.array_terminated) break; } out: btf_show_end_array_type(show); } static void btf_array_show(const struct btf *btf, const struct btf_type *t, u32 type_id, void *data, u8 bits_offset, struct btf_show *show) { const struct btf_member *m = show->state.member; /* * First check if any members would be shown (are non-zero). * See comments above "struct btf_show" definition for more * details on how this works at a high-level. */ if (show->state.depth > 0 && !(show->flags & BTF_SHOW_ZERO)) { if (!show->state.depth_check) { show->state.depth_check = show->state.depth + 1; show->state.depth_to_show = 0; } __btf_array_show(btf, t, type_id, data, bits_offset, show); show->state.member = m; if (show->state.depth_check != show->state.depth + 1) return; show->state.depth_check = 0; if (show->state.depth_to_show <= show->state.depth) return; /* * Reaching here indicates we have recursed and found * non-zero array member(s). */ } __btf_array_show(btf, t, type_id, data, bits_offset, show); } static const struct btf_kind_operations array_ops = { .check_meta = btf_array_check_meta, .resolve = btf_array_resolve, .check_member = btf_array_check_member, .check_kflag_member = btf_generic_check_kflag_member, .log_details = btf_array_log, .show = btf_array_show, }; static int btf_struct_check_member(struct btf_verifier_env *env, const struct btf_type *struct_type, const struct btf_member *member, const struct btf_type *member_type) { u32 struct_bits_off = member->offset; u32 struct_size, bytes_offset; if (BITS_PER_BYTE_MASKED(struct_bits_off)) { btf_verifier_log_member(env, struct_type, member, "Member is not byte aligned"); return -EINVAL; } struct_size = struct_type->size; bytes_offset = BITS_ROUNDDOWN_BYTES(struct_bits_off); if (struct_size - bytes_offset < member_type->size) { btf_verifier_log_member(env, struct_type, member, "Member exceeds struct_size"); return -EINVAL; } return 0; } static s32 btf_struct_check_meta(struct btf_verifier_env *env, const struct btf_type *t, u32 meta_left) { bool is_union = BTF_INFO_KIND(t->info) == BTF_KIND_UNION; const struct btf_member *member; u32 meta_needed, last_offset; struct btf *btf = env->btf; u32 struct_size = t->size; u32 offset; u16 i; meta_needed = btf_type_vlen(t) * sizeof(*member); if (meta_left < meta_needed) { btf_verifier_log_basic(env, t, "meta_left:%u meta_needed:%u", meta_left, meta_needed); return -EINVAL; } /* struct type either no name or a valid one */ if (t->name_off && !btf_name_valid_identifier(env->btf, t->name_off)) { btf_verifier_log_type(env, t, "Invalid name"); return -EINVAL; } btf_verifier_log_type(env, t, NULL); last_offset = 0; for_each_member(i, t, member) { if (!btf_name_offset_valid(btf, member->name_off)) { btf_verifier_log_member(env, t, member, "Invalid member name_offset:%u", member->name_off); return -EINVAL; } /* struct member either no name or a valid one */ if (member->name_off && !btf_name_valid_identifier(btf, member->name_off)) { btf_verifier_log_member(env, t, member, "Invalid name"); return -EINVAL; } /* A member cannot be in type void */ if (!member->type || !BTF_TYPE_ID_VALID(member->type)) { btf_verifier_log_member(env, t, member, "Invalid type_id"); return -EINVAL; } offset = __btf_member_bit_offset(t, member); if (is_union && offset) { btf_verifier_log_member(env, t, member, "Invalid member bits_offset"); return -EINVAL; } /* * ">" instead of ">=" because the last member could be * "char a[0];" */ if (last_offset > offset) { btf_verifier_log_member(env, t, member, "Invalid member bits_offset"); return -EINVAL; } if (BITS_ROUNDUP_BYTES(offset) > struct_size) { btf_verifier_log_member(env, t, member, "Member bits_offset exceeds its struct size"); return -EINVAL; } btf_verifier_log_member(env, t, member, NULL); last_offset = offset; } return meta_needed; } static int btf_struct_resolve(struct btf_verifier_env *env, const struct resolve_vertex *v) { const struct btf_member *member; int err; u16 i; /* Before continue resolving the next_member, * ensure the last member is indeed resolved to a * type with size info. */ if (v->next_member) { const struct btf_type *last_member_type; const struct btf_member *last_member; u32 last_member_type_id; last_member = btf_type_member(v->t) + v->next_member - 1; last_member_type_id = last_member->type; if (WARN_ON_ONCE(!env_type_is_resolved(env, last_member_type_id))) return -EINVAL; last_member_type = btf_type_by_id(env->btf, last_member_type_id); if (btf_type_kflag(v->t)) err = btf_type_ops(last_member_type)->check_kflag_member(env, v->t, last_member, last_member_type); else err = btf_type_ops(last_member_type)->check_member(env, v->t, last_member, last_member_type); if (err) return err; } for_each_member_from(i, v->next_member, v->t, member) { u32 member_type_id = member->type; const struct btf_type *member_type = btf_type_by_id(env->btf, member_type_id); if (btf_type_nosize_or_null(member_type) || btf_type_is_resolve_source_only(member_type)) { btf_verifier_log_member(env, v->t, member, "Invalid member"); return -EINVAL; } if (!env_type_is_resolve_sink(env, member_type) && !env_type_is_resolved(env, member_type_id)) { env_stack_set_next_member(env, i + 1); return env_stack_push(env, member_type, member_type_id); } if (btf_type_kflag(v->t)) err = btf_type_ops(member_type)->check_kflag_member(env, v->t, member, member_type); else err = btf_type_ops(member_type)->check_member(env, v->t, member, member_type); if (err) return err; } env_stack_pop_resolved(env, 0, 0); return 0; } static void btf_struct_log(struct btf_verifier_env *env, const struct btf_type *t) { btf_verifier_log(env, "size=%u vlen=%u", t->size, btf_type_vlen(t)); } enum { BTF_FIELD_IGNORE = 0, BTF_FIELD_FOUND = 1, }; struct btf_field_info { enum btf_field_type type; u32 off; union { struct { u32 type_id; } kptr; struct { const char *node_name; u32 value_btf_id; } graph_root; }; }; static int btf_find_struct(const struct btf *btf, const struct btf_type *t, u32 off, int sz, enum btf_field_type field_type, struct btf_field_info *info) { if (!__btf_type_is_struct(t)) return BTF_FIELD_IGNORE; if (t->size != sz) return BTF_FIELD_IGNORE; info->type = field_type; info->off = off; return BTF_FIELD_FOUND; } static int btf_find_kptr(const struct btf *btf, const struct btf_type *t, u32 off, int sz, struct btf_field_info *info, u32 field_mask) { enum btf_field_type type; const char *tag_value; bool is_type_tag; u32 res_id; /* Permit modifiers on the pointer itself */ if (btf_type_is_volatile(t)) t = btf_type_by_id(btf, t->type); /* For PTR, sz is always == 8 */ if (!btf_type_is_ptr(t)) return BTF_FIELD_IGNORE; t = btf_type_by_id(btf, t->type); is_type_tag = btf_type_is_type_tag(t) && !btf_type_kflag(t); if (!is_type_tag) return BTF_FIELD_IGNORE; /* Reject extra tags */ if (btf_type_is_type_tag(btf_type_by_id(btf, t->type))) return -EINVAL; tag_value = __btf_name_by_offset(btf, t->name_off); if (!strcmp("kptr_untrusted", tag_value)) type = BPF_KPTR_UNREF; else if (!strcmp("kptr", tag_value)) type = BPF_KPTR_REF; else if (!strcmp("percpu_kptr", tag_value)) type = BPF_KPTR_PERCPU; else if (!strcmp("uptr", tag_value)) type = BPF_UPTR; else return -EINVAL; if (!(type & field_mask)) return BTF_FIELD_IGNORE; /* Get the base type */ t = btf_type_skip_modifiers(btf, t->type, &res_id); /* Only pointer to struct is allowed */ if (!__btf_type_is_struct(t)) return -EINVAL; info->type = type; info->off = off; info->kptr.type_id = res_id; return BTF_FIELD_FOUND; } int btf_find_next_decl_tag(const struct btf *btf, const struct btf_type *pt, int comp_idx, const char *tag_key, int last_id) { int len = strlen(tag_key); int i, n; for (i = last_id + 1, n = btf_nr_types(btf); i < n; i++) { const struct btf_type *t = btf_type_by_id(btf, i); if (!btf_type_is_decl_tag(t)) continue; if (pt != btf_type_by_id(btf, t->type)) continue; if (btf_type_decl_tag(t)->component_idx != comp_idx) continue; if (strncmp(__btf_name_by_offset(btf, t->name_off), tag_key, len)) continue; return i; } return -ENOENT; } const char *btf_find_decl_tag_value(const struct btf *btf, const struct btf_type *pt, int comp_idx, const char *tag_key) { const char *value = NULL; const struct btf_type *t; int len, id; id = btf_find_next_decl_tag(btf, pt, comp_idx, tag_key, 0); if (id < 0) return ERR_PTR(id); t = btf_type_by_id(btf, id); len = strlen(tag_key); value = __btf_name_by_offset(btf, t->name_off) + len; /* Prevent duplicate entries for same type */ id = btf_find_next_decl_tag(btf, pt, comp_idx, tag_key, id); if (id >= 0) return ERR_PTR(-EEXIST); return value; } static int btf_find_graph_root(const struct btf *btf, const struct btf_type *pt, const struct btf_type *t, int comp_idx, u32 off, int sz, struct btf_field_info *info, enum btf_field_type head_type) { const char *node_field_name; const char *value_type; s32 id; if (!__btf_type_is_struct(t)) return BTF_FIELD_IGNORE; if (t->size != sz) return BTF_FIELD_IGNORE; value_type = btf_find_decl_tag_value(btf, pt, comp_idx, "contains:"); if (IS_ERR(value_type)) return -EINVAL; node_field_name = strstr(value_type, ":"); if (!node_field_name) return -EINVAL; value_type = kstrndup(value_type, node_field_name - value_type, GFP_KERNEL_ACCOUNT | __GFP_NOWARN); if (!value_type) return -ENOMEM; id = btf_find_by_name_kind(btf, value_type, BTF_KIND_STRUCT); kfree(value_type); if (id < 0) return id; node_field_name++; if (str_is_empty(node_field_name)) return -EINVAL; info->type = head_type; info->off = off; info->graph_root.value_btf_id = id; info->graph_root.node_name = node_field_name; return BTF_FIELD_FOUND; } static int btf_get_field_type(const struct btf *btf, const struct btf_type *var_type, u32 field_mask, u32 *seen_mask, int *align, int *sz) { const struct { enum btf_field_type type; const char *const name; const bool is_unique; } field_types[] = { { BPF_SPIN_LOCK, "bpf_spin_lock", true }, { BPF_RES_SPIN_LOCK, "bpf_res_spin_lock", true }, { BPF_TIMER, "bpf_timer", true }, { BPF_WORKQUEUE, "bpf_wq", true }, { BPF_TASK_WORK, "bpf_task_work", true }, { BPF_LIST_HEAD, "bpf_list_head", false }, { BPF_LIST_NODE, "bpf_list_node", false }, { BPF_RB_ROOT, "bpf_rb_root", false }, { BPF_RB_NODE, "bpf_rb_node", false }, { BPF_REFCOUNT, "bpf_refcount", false }, }; int type = 0, i; const char *name = __btf_name_by_offset(btf, var_type->name_off); const char *field_type_name; enum btf_field_type field_type; bool is_unique; for (i = 0; i < ARRAY_SIZE(field_types); ++i) { field_type = field_types[i].type; field_type_name = field_types[i].name; is_unique = field_types[i].is_unique; if (!(field_mask & field_type) || strcmp(name, field_type_name)) continue; if (is_unique) { if (*seen_mask & field_type) return -E2BIG; *seen_mask |= field_type; } type = field_type; goto end; } /* Only return BPF_KPTR when all other types with matchable names fail */ if (field_mask & (BPF_KPTR | BPF_UPTR) && !__btf_type_is_struct(var_type)) { type = BPF_KPTR_REF; goto end; } return 0; end: *sz = btf_field_type_size(type); *align = btf_field_type_align(type); return type; } /* Repeat a number of fields for a specified number of times. * * Copy the fields starting from the first field and repeat them for * repeat_cnt times. The fields are repeated by adding the offset of each * field with * (i + 1) * elem_size * where i is the repeat index and elem_size is the size of an element. */ static int btf_repeat_fields(struct btf_field_info *info, int info_cnt, u32 field_cnt, u32 repeat_cnt, u32 elem_size) { u32 i, j; u32 cur; /* Ensure not repeating fields that should not be repeated. */ for (i = 0; i < field_cnt; i++) { switch (info[i].type) { case BPF_KPTR_UNREF: case BPF_KPTR_REF: case BPF_KPTR_PERCPU: case BPF_UPTR: case BPF_LIST_HEAD: case BPF_RB_ROOT: break; default: return -EINVAL; } } /* The type of struct size or variable size is u32, * so the multiplication will not overflow. */ if (field_cnt * (repeat_cnt + 1) > info_cnt) return -E2BIG; cur = field_cnt; for (i = 0; i < repeat_cnt; i++) { memcpy(&info[cur], &info[0], field_cnt * sizeof(info[0])); for (j = 0; j < field_cnt; j++) info[cur++].off += (i + 1) * elem_size; } return 0; } static int btf_find_struct_field(const struct btf *btf, const struct btf_type *t, u32 field_mask, struct btf_field_info *info, int info_cnt, u32 level); /* Find special fields in the struct type of a field. * * This function is used to find fields of special types that is not a * global variable or a direct field of a struct type. It also handles the * repetition if it is the element type of an array. */ static int btf_find_nested_struct(const struct btf *btf, const struct btf_type *t, u32 off, u32 nelems, u32 field_mask, struct btf_field_info *info, int info_cnt, u32 level) { int ret, err, i; level++; if (level >= MAX_RESOLVE_DEPTH) return -E2BIG; ret = btf_find_struct_field(btf, t, field_mask, info, info_cnt, level); if (ret <= 0) return ret; /* Shift the offsets of the nested struct fields to the offsets * related to the container. */ for (i = 0; i < ret; i++) info[i].off += off; if (nelems > 1) { err = btf_repeat_fields(info, info_cnt, ret, nelems - 1, t->size); if (err == 0) ret *= nelems; else ret = err; } return ret; } static int btf_find_field_one(const struct btf *btf, const struct btf_type *var, const struct btf_type *var_type, int var_idx, u32 off, u32 expected_size, u32 field_mask, u32 *seen_mask, struct btf_field_info *info, int info_cnt, u32 level) { int ret, align, sz, field_type; struct btf_field_info tmp; const struct btf_array *array; u32 i, nelems = 1; /* Walk into array types to find the element type and the number of * elements in the (flattened) array. */ for (i = 0; i < MAX_RESOLVE_DEPTH && btf_type_is_array(var_type); i++) { array = btf_array(var_type); nelems *= array->nelems; var_type = btf_type_by_id(btf, array->type); } if (i == MAX_RESOLVE_DEPTH) return -E2BIG; if (nelems == 0) return 0; field_type = btf_get_field_type(btf, var_type, field_mask, seen_mask, &align, &sz); /* Look into variables of struct types */ if (!field_type && __btf_type_is_struct(var_type)) { sz = var_type->size; if (expected_size && expected_size != sz * nelems) return 0; ret = btf_find_nested_struct(btf, var_type, off, nelems, field_mask, &info[0], info_cnt, level); return ret; } if (field_type == 0) return 0; if (field_type < 0) return field_type; if (expected_size && expected_size != sz * nelems) return 0; if (off % align) return 0; switch (field_type) { case BPF_SPIN_LOCK: case BPF_RES_SPIN_LOCK: case BPF_TIMER: case BPF_WORKQUEUE: case BPF_LIST_NODE: case BPF_RB_NODE: case BPF_REFCOUNT: case BPF_TASK_WORK: ret = btf_find_struct(btf, var_type, off, sz, field_type, info_cnt ? &info[0] : &tmp); if (ret < 0) return ret; break; case BPF_KPTR_UNREF: case BPF_KPTR_REF: case BPF_KPTR_PERCPU: case BPF_UPTR: ret = btf_find_kptr(btf, var_type, off, sz, info_cnt ? &info[0] : &tmp, field_mask); if (ret < 0) return ret; break; case BPF_LIST_HEAD: case BPF_RB_ROOT: ret = btf_find_graph_root(btf, var, var_type, var_idx, off, sz, info_cnt ? &info[0] : &tmp, field_type); if (ret < 0) return ret; break; default: return -EFAULT; } if (ret == BTF_FIELD_IGNORE) return 0; if (!info_cnt) return -E2BIG; if (nelems > 1) { ret = btf_repeat_fields(info, info_cnt, 1, nelems - 1, sz); if (ret < 0) return ret; } return nelems; } static int btf_find_struct_field(const struct btf *btf, const struct btf_type *t, u32 field_mask, struct btf_field_info *info, int info_cnt, u32 level) { int ret, idx = 0; const struct btf_member *member; u32 i, off, seen_mask = 0; for_each_member(i, t, member) { const struct btf_type *member_type = btf_type_by_id(btf, member->type); off = __btf_member_bit_offset(t, member); if (off % 8) /* valid C code cannot generate such BTF */ return -EINVAL; off /= 8; ret = btf_find_field_one(btf, t, member_type, i, off, 0, field_mask, &seen_mask, &info[idx], info_cnt - idx, level); if (ret < 0) return ret; idx += ret; } return idx; } static int btf_find_datasec_var(const struct btf *btf, const struct btf_type *t, u32 field_mask, struct btf_field_info *info, int info_cnt, u32 level) { int ret, idx = 0; const struct btf_var_secinfo *vsi; u32 i, off, seen_mask = 0; for_each_vsi(i, t, vsi) { const struct btf_type *var = btf_type_by_id(btf, vsi->type); const struct btf_type *var_type = btf_type_by_id(btf, var->type); off = vsi->offset; ret = btf_find_field_one(btf, var, var_type, -1, off, vsi->size, field_mask, &seen_mask, &info[idx], info_cnt - idx, level); if (ret < 0) return ret; idx += ret; } return idx; } static int btf_find_field(const struct btf *btf, const struct btf_type *t, u32 field_mask, struct btf_field_info *info, int info_cnt) { if (__btf_type_is_struct(t)) return btf_find_struct_field(btf, t, field_mask, info, info_cnt, 0); else if (btf_type_is_datasec(t)) return btf_find_datasec_var(btf, t, field_mask, info, info_cnt, 0); return -EINVAL; } /* Callers have to ensure the life cycle of btf if it is program BTF */ static int btf_parse_kptr(const struct btf *btf, struct btf_field *field, struct btf_field_info *info) { struct module *mod = NULL; const struct btf_type *t; /* If a matching btf type is found in kernel or module BTFs, kptr_ref * is that BTF, otherwise it's program BTF */ struct btf *kptr_btf; int ret; s32 id; /* Find type in map BTF, and use it to look up the matching type * in vmlinux or module BTFs, by name and kind. */ t = btf_type_by_id(btf, info->kptr.type_id); id = bpf_find_btf_id(__btf_name_by_offset(btf, t->name_off), BTF_INFO_KIND(t->info), &kptr_btf); if (id == -ENOENT) { /* btf_parse_kptr should only be called w/ btf = program BTF */ WARN_ON_ONCE(btf_is_kernel(btf)); /* Type exists only in program BTF. Assume that it's a MEM_ALLOC * kptr allocated via bpf_obj_new */ field->kptr.dtor = NULL; id = info->kptr.type_id; kptr_btf = (struct btf *)btf; goto found_dtor; } if (id < 0) return id; /* Find and stash the function pointer for the destruction function that * needs to be eventually invoked from the map free path. */ if (info->type == BPF_KPTR_REF) { const struct btf_type *dtor_func; const char *dtor_func_name; unsigned long addr; s32 dtor_btf_id; /* This call also serves as a whitelist of allowed objects that * can be used as a referenced pointer and be stored in a map at * the same time. */ dtor_btf_id = btf_find_dtor_kfunc(kptr_btf, id); if (dtor_btf_id < 0) { ret = dtor_btf_id; goto end_btf; } dtor_func = btf_type_by_id(kptr_btf, dtor_btf_id); if (!dtor_func) { ret = -ENOENT; goto end_btf; } if (btf_is_module(kptr_btf)) { mod = btf_try_get_module(kptr_btf); if (!mod) { ret = -ENXIO; goto end_btf; } } /* We already verified dtor_func to be btf_type_is_func * in register_btf_id_dtor_kfuncs. */ dtor_func_name = __btf_name_by_offset(kptr_btf, dtor_func->name_off); addr = kallsyms_lookup_name(dtor_func_name); if (!addr) { ret = -EINVAL; goto end_mod; } field->kptr.dtor = (void *)addr; } found_dtor: field->kptr.btf_id = id; field->kptr.btf = kptr_btf; field->kptr.module = mod; return 0; end_mod: module_put(mod); end_btf: btf_put(kptr_btf); return ret; } static int btf_parse_graph_root(const struct btf *btf, struct btf_field *field, struct btf_field_info *info, const char *node_type_name, size_t node_type_align) { const struct btf_type *t, *n = NULL; const struct btf_member *member; u32 offset; int i; t = btf_type_by_id(btf, info->graph_root.value_btf_id); /* We've already checked that value_btf_id is a struct type. We * just need to figure out the offset of the list_node, and * verify its type. */ for_each_member(i, t, member) { if (strcmp(info->graph_root.node_name, __btf_name_by_offset(btf, member->name_off))) continue; /* Invalid BTF, two members with same name */ if (n) return -EINVAL; n = btf_type_by_id(btf, member->type); if (!__btf_type_is_struct(n)) return -EINVAL; if (strcmp(node_type_name, __btf_name_by_offset(btf, n->name_off))) return -EINVAL; offset = __btf_member_bit_offset(n, member); if (offset % 8) return -EINVAL; offset /= 8; if (offset % node_type_align) return -EINVAL; field->graph_root.btf = (struct btf *)btf; field->graph_root.value_btf_id = info->graph_root.value_btf_id; field->graph_root.node_offset = offset; } if (!n) return -ENOENT; return 0; } static int btf_parse_list_head(const struct btf *btf, struct btf_field *field, struct btf_field_info *info) { return btf_parse_graph_root(btf, field, info, "bpf_list_node", __alignof__(struct bpf_list_node)); } static int btf_parse_rb_root(const struct btf *btf, struct btf_field *field, struct btf_field_info *info) { return btf_parse_graph_root(btf, field, info, "bpf_rb_node", __alignof__(struct bpf_rb_node)); } static int btf_field_cmp(const void *_a, const void *_b, const void *priv) { const struct btf_field *a = (const struct btf_field *)_a; const struct btf_field *b = (const struct btf_field *)_b; if (a->offset < b->offset) return -1; else if (a->offset > b->offset) return 1; return 0; } struct btf_record *btf_parse_fields(const struct btf *btf, const struct btf_type *t, u32 field_mask, u32 value_size) { struct btf_field_info info_arr[BTF_FIELDS_MAX]; u32 next_off = 0, field_type_size; struct btf_record *rec; int ret, i, cnt; ret = btf_find_field(btf, t, field_mask, info_arr, ARRAY_SIZE(info_arr)); if (ret < 0) return ERR_PTR(ret); if (!ret) return NULL; cnt = ret; /* This needs to be kzalloc to zero out padding and unused fields, see * comment in btf_record_equal. */ rec = kzalloc(struct_size(rec, fields, cnt), GFP_KERNEL_ACCOUNT | __GFP_NOWARN); if (!rec) return ERR_PTR(-ENOMEM); rec->spin_lock_off = -EINVAL; rec->res_spin_lock_off = -EINVAL; rec->timer_off = -EINVAL; rec->wq_off = -EINVAL; rec->refcount_off = -EINVAL; rec->task_work_off = -EINVAL; for (i = 0; i < cnt; i++) { field_type_size = btf_field_type_size(info_arr[i].type); if (info_arr[i].off + field_type_size > value_size) { WARN_ONCE(1, "verifier bug off %d size %d", info_arr[i].off, value_size); ret = -EFAULT; goto end; } if (info_arr[i].off < next_off) { ret = -EEXIST; goto end; } next_off = info_arr[i].off + field_type_size; rec->field_mask |= info_arr[i].type; rec->fields[i].offset = info_arr[i].off; rec->fields[i].type = info_arr[i].type; rec->fields[i].size = field_type_size; switch (info_arr[i].type) { case BPF_SPIN_LOCK: WARN_ON_ONCE(rec->spin_lock_off >= 0); /* Cache offset for faster lookup at runtime */ rec->spin_lock_off = rec->fields[i].offset; break; case BPF_RES_SPIN_LOCK: WARN_ON_ONCE(rec->spin_lock_off >= 0); /* Cache offset for faster lookup at runtime */ rec->res_spin_lock_off = rec->fields[i].offset; break; case BPF_TIMER: WARN_ON_ONCE(rec->timer_off >= 0); /* Cache offset for faster lookup at runtime */ rec->timer_off = rec->fields[i].offset; break; case BPF_WORKQUEUE: WARN_ON_ONCE(rec->wq_off >= 0); /* Cache offset for faster lookup at runtime */ rec->wq_off = rec->fields[i].offset; break; case BPF_TASK_WORK: WARN_ON_ONCE(rec->task_work_off >= 0); rec->task_work_off = rec->fields[i].offset; break; case BPF_REFCOUNT: WARN_ON_ONCE(rec->refcount_off >= 0); /* Cache offset for faster lookup at runtime */ rec->refcount_off = rec->fields[i].offset; break; case BPF_KPTR_UNREF: case BPF_KPTR_REF: case BPF_KPTR_PERCPU: case BPF_UPTR: ret = btf_parse_kptr(btf, &rec->fields[i], &info_arr[i]); if (ret < 0) goto end; break; case BPF_LIST_HEAD: ret = btf_parse_list_head(btf, &rec->fields[i], &info_arr[i]); if (ret < 0) goto end; break; case BPF_RB_ROOT: ret = btf_parse_rb_root(btf, &rec->fields[i], &info_arr[i]); if (ret < 0) goto end; break; case BPF_LIST_NODE: case BPF_RB_NODE: break; default: ret = -EFAULT; goto end; } rec->cnt++; } if (rec->spin_lock_off >= 0 && rec->res_spin_lock_off >= 0) { ret = -EINVAL; goto end; } /* bpf_{list_head, rb_node} require bpf_spin_lock */ if ((btf_record_has_field(rec, BPF_LIST_HEAD) || btf_record_has_field(rec, BPF_RB_ROOT)) && (rec->spin_lock_off < 0 && rec->res_spin_lock_off < 0)) { ret = -EINVAL; goto end; } if (rec->refcount_off < 0 && btf_record_has_field(rec, BPF_LIST_NODE) && btf_record_has_field(rec, BPF_RB_NODE)) { ret = -EINVAL; goto end; } sort_r(rec->fields, rec->cnt, sizeof(struct btf_field), btf_field_cmp, NULL, rec); return rec; end: btf_record_free(rec); return ERR_PTR(ret); } int btf_check_and_fixup_fields(const struct btf *btf, struct btf_record *rec) { int i; /* There are three types that signify ownership of some other type: * kptr_ref, bpf_list_head, bpf_rb_root. * kptr_ref only supports storing kernel types, which can't store * references to program allocated local types. * * Hence we only need to ensure that bpf_{list_head,rb_root} ownership * does not form cycles. */ if (IS_ERR_OR_NULL(rec) || !(rec->field_mask & (BPF_GRAPH_ROOT | BPF_UPTR))) return 0; for (i = 0; i < rec->cnt; i++) { struct btf_struct_meta *meta; const struct btf_type *t; u32 btf_id; if (rec->fields[i].type == BPF_UPTR) { /* The uptr only supports pinning one page and cannot * point to a kernel struct */ if (btf_is_kernel(rec->fields[i].kptr.btf)) return -EINVAL; t = btf_type_by_id(rec->fields[i].kptr.btf, rec->fields[i].kptr.btf_id); if (!t->size) return -EINVAL; if (t->size > PAGE_SIZE) return -E2BIG; continue; } if (!(rec->fields[i].type & BPF_GRAPH_ROOT)) continue; btf_id = rec->fields[i].graph_root.value_btf_id; meta = btf_find_struct_meta(btf, btf_id); if (!meta) return -EFAULT; rec->fields[i].graph_root.value_rec = meta->record; /* We need to set value_rec for all root types, but no need * to check ownership cycle for a type unless it's also a * node type. */ if (!(rec->field_mask & BPF_GRAPH_NODE)) continue; /* We need to ensure ownership acyclicity among all types. The * proper way to do it would be to topologically sort all BTF * IDs based on the ownership edges, since there can be multiple * bpf_{list_head,rb_node} in a type. Instead, we use the * following resaoning: * * - A type can only be owned by another type in user BTF if it * has a bpf_{list,rb}_node. Let's call these node types. * - A type can only _own_ another type in user BTF if it has a * bpf_{list_head,rb_root}. Let's call these root types. * * We ensure that if a type is both a root and node, its * element types cannot be root types. * * To ensure acyclicity: * * When A is an root type but not a node, its ownership * chain can be: * A -> B -> C * Where: * - A is an root, e.g. has bpf_rb_root. * - B is both a root and node, e.g. has bpf_rb_node and * bpf_list_head. * - C is only an root, e.g. has bpf_list_node * * When A is both a root and node, some other type already * owns it in the BTF domain, hence it can not own * another root type through any of the ownership edges. * A -> B * Where: * - A is both an root and node. * - B is only an node. */ if (meta->record->field_mask & BPF_GRAPH_ROOT) return -ELOOP; } return 0; } static void __btf_struct_show(const struct btf *btf, const struct btf_type *t, u32 type_id, void *data, u8 bits_offset, struct btf_show *show) { const struct btf_member *member; void *safe_data; u32 i; safe_data = btf_show_start_struct_type(show, t, type_id, data); if (!safe_data) return; for_each_member(i, t, member) { const struct btf_type *member_type = btf_type_by_id(btf, member->type); const struct btf_kind_operations *ops; u32 member_offset, bitfield_size; u32 bytes_offset; u8 bits8_offset; btf_show_start_member(show, member); member_offset = __btf_member_bit_offset(t, member); bitfield_size = __btf_member_bitfield_size(t, member); bytes_offset = BITS_ROUNDDOWN_BYTES(member_offset); bits8_offset = BITS_PER_BYTE_MASKED(member_offset); if (bitfield_size) { safe_data = btf_show_start_type(show, member_type, member->type, data + bytes_offset); if (safe_data) btf_bitfield_show(safe_data, bits8_offset, bitfield_size, show); btf_show_end_type(show); } else { ops = btf_type_ops(member_type); ops->show(btf, member_type, member->type, data + bytes_offset, bits8_offset, show); } btf_show_end_member(show); } btf_show_end_struct_type(show); } static void btf_struct_show(const struct btf *btf, const struct btf_type *t, u32 type_id, void *data, u8 bits_offset, struct btf_show *show) { const struct btf_member *m = show->state.member; /* * First check if any members would be shown (are non-zero). * See comments above "struct btf_show" definition for more * details on how this works at a high-level. */ if (show->state.depth > 0 && !(show->flags & BTF_SHOW_ZERO)) { if (!show->state.depth_check) { show->state.depth_check = show->state.depth + 1; show->state.depth_to_show = 0; } __btf_struct_show(btf, t, type_id, data, bits_offset, show); /* Restore saved member data here */ show->state.member = m; if (show->state.depth_check != show->state.depth + 1) return; show->state.depth_check = 0; if (show->state.depth_to_show <= show->state.depth) return; /* * Reaching here indicates we have recursed and found * non-zero child values. */ } __btf_struct_show(btf, t, type_id, data, bits_offset, show); } static const struct btf_kind_operations struct_ops = { .check_meta = btf_struct_check_meta, .resolve = btf_struct_resolve, .check_member = btf_struct_check_member, .check_kflag_member = btf_generic_check_kflag_member, .log_details = btf_struct_log, .show = btf_struct_show, }; static int btf_enum_check_member(struct btf_verifier_env *env, const struct btf_type *struct_type, const struct btf_member *member, const struct btf_type *member_type) { u32 struct_bits_off = member->offset; u32 struct_size, bytes_offset; if (BITS_PER_BYTE_MASKED(struct_bits_off)) { btf_verifier_log_member(env, struct_type, member, "Member is not byte aligned"); return -EINVAL; } struct_size = struct_type->size; bytes_offset = BITS_ROUNDDOWN_BYTES(struct_bits_off); if (struct_size - bytes_offset < member_type->size) { btf_verifier_log_member(env, struct_type, member, "Member exceeds struct_size"); return -EINVAL; } return 0; } static int btf_enum_check_kflag_member(struct btf_verifier_env *env, const struct btf_type *struct_type, const struct btf_member *member, const struct btf_type *member_type) { u32 struct_bits_off, nr_bits, bytes_end, struct_size; u32 int_bitsize = sizeof(int) * BITS_PER_BYTE; struct_bits_off = BTF_MEMBER_BIT_OFFSET(member->offset); nr_bits = BTF_MEMBER_BITFIELD_SIZE(member->offset); if (!nr_bits) { if (BITS_PER_BYTE_MASKED(struct_bits_off)) { btf_verifier_log_member(env, struct_type, member, "Member is not byte aligned"); return -EINVAL; } nr_bits = int_bitsize; } else if (nr_bits > int_bitsize) { btf_verifier_log_member(env, struct_type, member, "Invalid member bitfield_size"); return -EINVAL; } struct_size = struct_type->size; bytes_end = BITS_ROUNDUP_BYTES(struct_bits_off + nr_bits); if (struct_size < bytes_end) { btf_verifier_log_member(env, struct_type, member, "Member exceeds struct_size"); return -EINVAL; } return 0; } static s32 btf_enum_check_meta(struct btf_verifier_env *env, const struct btf_type *t, u32 meta_left) { const struct btf_enum *enums = btf_type_enum(t); struct btf *btf = env->btf; const char *fmt_str; u16 i, nr_enums; u32 meta_needed; nr_enums = btf_type_vlen(t); meta_needed = nr_enums * sizeof(*enums); if (meta_left < meta_needed) { btf_verifier_log_basic(env, t, "meta_left:%u meta_needed:%u", meta_left, meta_needed); return -EINVAL; } if (t->size > 8 || !is_power_of_2(t->size)) { btf_verifier_log_type(env, t, "Unexpected size"); return -EINVAL; } /* enum type either no name or a valid one */ if (t->name_off && !btf_name_valid_identifier(env->btf, t->name_off)) { btf_verifier_log_type(env, t, "Invalid name"); return -EINVAL; } btf_verifier_log_type(env, t, NULL); for (i = 0; i < nr_enums; i++) { if (!btf_name_offset_valid(btf, enums[i].name_off)) { btf_verifier_log(env, "\tInvalid name_offset:%u", enums[i].name_off); return -EINVAL; } /* enum member must have a valid name */ if (!enums[i].name_off || !btf_name_valid_identifier(btf, enums[i].name_off)) { btf_verifier_log_type(env, t, "Invalid name"); return -EINVAL; } if (env->log.level == BPF_LOG_KERNEL) continue; fmt_str = btf_type_kflag(t) ? "\t%s val=%d\n" : "\t%s val=%u\n"; btf_verifier_log(env, fmt_str, __btf_name_by_offset(btf, enums[i].name_off), enums[i].val); } return meta_needed; } static void btf_enum_log(struct btf_verifier_env *env, const struct btf_type *t) { btf_verifier_log(env, "size=%u vlen=%u", t->size, btf_type_vlen(t)); } static void btf_enum_show(const struct btf *btf, const struct btf_type *t, u32 type_id, void *data, u8 bits_offset, struct btf_show *show) { const struct btf_enum *enums = btf_type_enum(t); u32 i, nr_enums = btf_type_vlen(t); void *safe_data; int v; safe_data = btf_show_start_type(show, t, type_id, data); if (!safe_data) return; v = *(int *)safe_data; for (i = 0; i < nr_enums; i++) { if (v != enums[i].val) continue; btf_show_type_value(show, "%s", __btf_name_by_offset(btf, enums[i].name_off)); btf_show_end_type(show); return; } if (btf_type_kflag(t)) btf_show_type_value(show, "%d", v); else btf_show_type_value(show, "%u", v); btf_show_end_type(show); } static const struct btf_kind_operations enum_ops = { .check_meta = btf_enum_check_meta, .resolve = btf_df_resolve, .check_member = btf_enum_check_member, .check_kflag_member = btf_enum_check_kflag_member, .log_details = btf_enum_log, .show = btf_enum_show, }; static s32 btf_enum64_check_meta(struct btf_verifier_env *env, const struct btf_type *t, u32 meta_left) { const struct btf_enum64 *enums = btf_type_enum64(t); struct btf *btf = env->btf; const char *fmt_str; u16 i, nr_enums; u32 meta_needed; nr_enums = btf_type_vlen(t); meta_needed = nr_enums * sizeof(*enums); if (meta_left < meta_needed) { btf_verifier_log_basic(env, t, "meta_left:%u meta_needed:%u", meta_left, meta_needed); return -EINVAL; } if (t->size > 8 || !is_power_of_2(t->size)) { btf_verifier_log_type(env, t, "Unexpected size"); return -EINVAL; } /* enum type either no name or a valid one */ if (t->name_off && !btf_name_valid_identifier(env->btf, t->name_off)) { btf_verifier_log_type(env, t, "Invalid name"); return -EINVAL; } btf_verifier_log_type(env, t, NULL); for (i = 0; i < nr_enums; i++) { if (!btf_name_offset_valid(btf, enums[i].name_off)) { btf_verifier_log(env, "\tInvalid name_offset:%u", enums[i].name_off); return -EINVAL; } /* enum member must have a valid name */ if (!enums[i].name_off || !btf_name_valid_identifier(btf, enums[i].name_off)) { btf_verifier_log_type(env, t, "Invalid name"); return -EINVAL; } if (env->log.level == BPF_LOG_KERNEL) continue; fmt_str = btf_type_kflag(t) ? "\t%s val=%lld\n" : "\t%s val=%llu\n"; btf_verifier_log(env, fmt_str, __btf_name_by_offset(btf, enums[i].name_off), btf_enum64_value(enums + i)); } return meta_needed; } static void btf_enum64_show(const struct btf *btf, const struct btf_type *t, u32 type_id, void *data, u8 bits_offset, struct btf_show *show) { const struct btf_enum64 *enums = btf_type_enum64(t); u32 i, nr_enums = btf_type_vlen(t); void *safe_data; s64 v; safe_data = btf_show_start_type(show, t, type_id, data); if (!safe_data) return; v = *(u64 *)safe_data; for (i = 0; i < nr_enums; i++) { if (v != btf_enum64_value(enums + i)) continue; btf_show_type_value(show, "%s", __btf_name_by_offset(btf, enums[i].name_off)); btf_show_end_type(show); return; } if (btf_type_kflag(t)) btf_show_type_value(show, "%lld", v); else btf_show_type_value(show, "%llu", v); btf_show_end_type(show); } static const struct btf_kind_operations enum64_ops = { .check_meta = btf_enum64_check_meta, .resolve = btf_df_resolve, .check_member = btf_enum_check_member, .check_kflag_member = btf_enum_check_kflag_member, .log_details = btf_enum_log, .show = btf_enum64_show, }; static s32 btf_func_proto_check_meta(struct btf_verifier_env *env, const struct btf_type *t, u32 meta_left) { u32 meta_needed = btf_type_vlen(t) * sizeof(struct btf_param); if (meta_left < meta_needed) { btf_verifier_log_basic(env, t, "meta_left:%u meta_needed:%u", meta_left, meta_needed); return -EINVAL; } if (t->name_off) { btf_verifier_log_type(env, t, "Invalid name"); return -EINVAL; } if (btf_type_kflag(t)) { btf_verifier_log_type(env, t, "Invalid btf_info kind_flag"); return -EINVAL; } btf_verifier_log_type(env, t, NULL); return meta_needed; } static void btf_func_proto_log(struct btf_verifier_env *env, const struct btf_type *t) { const struct btf_param *args = (const struct btf_param *)(t + 1); u16 nr_args = btf_type_vlen(t), i; btf_verifier_log(env, "return=%u args=(", t->type); if (!nr_args) { btf_verifier_log(env, "void"); goto done; } if (nr_args == 1 && !args[0].type) { /* Only one vararg */ btf_verifier_log(env, "vararg"); goto done; } btf_verifier_log(env, "%u %s", args[0].type, __btf_name_by_offset(env->btf, args[0].name_off)); for (i = 1; i < nr_args - 1; i++) btf_verifier_log(env, ", %u %s", args[i].type, __btf_name_by_offset(env->btf, args[i].name_off)); if (nr_args > 1) { const struct btf_param *last_arg = &args[nr_args - 1]; if (last_arg->type) btf_verifier_log(env, ", %u %s", last_arg->type, __btf_name_by_offset(env->btf, last_arg->name_off)); else btf_verifier_log(env, ", vararg"); } done: btf_verifier_log(env, ")"); } static const struct btf_kind_operations func_proto_ops = { .check_meta = btf_func_proto_check_meta, .resolve = btf_df_resolve, /* * BTF_KIND_FUNC_PROTO cannot be directly referred by * a struct's member. * * It should be a function pointer instead. * (i.e. struct's member -> BTF_KIND_PTR -> BTF_KIND_FUNC_PROTO) * * Hence, there is no btf_func_check_member(). */ .check_member = btf_df_check_member, .check_kflag_member = btf_df_check_kflag_member, .log_details = btf_func_proto_log, .show = btf_df_show, }; static s32 btf_func_check_meta(struct btf_verifier_env *env, const struct btf_type *t, u32 meta_left) { if (!t->name_off || !btf_name_valid_identifier(env->btf, t->name_off)) { btf_verifier_log_type(env, t, "Invalid name"); return -EINVAL; } if (btf_type_vlen(t) > BTF_FUNC_GLOBAL) { btf_verifier_log_type(env, t, "Invalid func linkage"); return -EINVAL; } if (btf_type_kflag(t)) { btf_verifier_log_type(env, t, "Invalid btf_info kind_flag"); return -EINVAL; } btf_verifier_log_type(env, t, NULL); return 0; } static int btf_func_resolve(struct btf_verifier_env *env, const struct resolve_vertex *v) { const struct btf_type *t = v->t; u32 next_type_id = t->type; int err; err = btf_func_check(env, t); if (err) return err; env_stack_pop_resolved(env, next_type_id, 0); return 0; } static const struct btf_kind_operations func_ops = { .check_meta = btf_func_check_meta, .resolve = btf_func_resolve, .check_member = btf_df_check_member, .check_kflag_member = btf_df_check_kflag_member, .log_details = btf_ref_type_log, .show = btf_df_show, }; static s32 btf_var_check_meta(struct btf_verifier_env *env, const struct btf_type *t, u32 meta_left) { const struct btf_var *var; u32 meta_needed = sizeof(*var); if (meta_left < meta_needed) { btf_verifier_log_basic(env, t, "meta_left:%u meta_needed:%u", meta_left, meta_needed); return -EINVAL; } if (btf_type_vlen(t)) { btf_verifier_log_type(env, t, "vlen != 0"); return -EINVAL; } if (btf_type_kflag(t)) { btf_verifier_log_type(env, t, "Invalid btf_info kind_flag"); return -EINVAL; } if (!t->name_off || !btf_name_valid_identifier(env->btf, t->name_off)) { btf_verifier_log_type(env, t, "Invalid name"); return -EINVAL; } /* A var cannot be in type void */ if (!t->type || !BTF_TYPE_ID_VALID(t->type)) { btf_verifier_log_type(env, t, "Invalid type_id"); return -EINVAL; } var = btf_type_var(t); if (var->linkage != BTF_VAR_STATIC && var->linkage != BTF_VAR_GLOBAL_ALLOCATED) { btf_verifier_log_type(env, t, "Linkage not supported"); return -EINVAL; } btf_verifier_log_type(env, t, NULL); return meta_needed; } static void btf_var_log(struct btf_verifier_env *env, const struct btf_type *t) { const struct btf_var *var = btf_type_var(t); btf_verifier_log(env, "type_id=%u linkage=%u", t->type, var->linkage); } static const struct btf_kind_operations var_ops = { .check_meta = btf_var_check_meta, .resolve = btf_var_resolve, .check_member = btf_df_check_member, .check_kflag_member = btf_df_check_kflag_member, .log_details = btf_var_log, .show = btf_var_show, }; static s32 btf_datasec_check_meta(struct btf_verifier_env *env, const struct btf_type *t, u32 meta_left) { const struct btf_var_secinfo *vsi; u64 last_vsi_end_off = 0, sum = 0; u32 i, meta_needed; meta_needed = btf_type_vlen(t) * sizeof(*vsi); if (meta_left < meta_needed) { btf_verifier_log_basic(env, t, "meta_left:%u meta_needed:%u", meta_left, meta_needed); return -EINVAL; } if (!t->size) { btf_verifier_log_type(env, t, "size == 0"); return -EINVAL; } if (btf_type_kflag(t)) { btf_verifier_log_type(env, t, "Invalid btf_info kind_flag"); return -EINVAL; } if (!t->name_off || !btf_name_valid_section(env->btf, t->name_off)) { btf_verifier_log_type(env, t, "Invalid name"); return -EINVAL; } btf_verifier_log_type(env, t, NULL); for_each_vsi(i, t, vsi) { /* A var cannot be in type void */ if (!vsi->type || !BTF_TYPE_ID_VALID(vsi->type)) { btf_verifier_log_vsi(env, t, vsi, "Invalid type_id"); return -EINVAL; } if (vsi->offset < last_vsi_end_off || vsi->offset >= t->size) { btf_verifier_log_vsi(env, t, vsi, "Invalid offset"); return -EINVAL; } if (!vsi->size || vsi->size > t->size) { btf_verifier_log_vsi(env, t, vsi, "Invalid size"); return -EINVAL; } last_vsi_end_off = vsi->offset + vsi->size; if (last_vsi_end_off > t->size) { btf_verifier_log_vsi(env, t, vsi, "Invalid offset+size"); return -EINVAL; } btf_verifier_log_vsi(env, t, vsi, NULL); sum += vsi->size; } if (t->size < sum) { btf_verifier_log_type(env, t, "Invalid btf_info size"); return -EINVAL; } return meta_needed; } static int btf_datasec_resolve(struct btf_verifier_env *env, const struct resolve_vertex *v) { const struct btf_var_secinfo *vsi; struct btf *btf = env->btf; u16 i; env->resolve_mode = RESOLVE_TBD; for_each_vsi_from(i, v->next_member, v->t, vsi) { u32 var_type_id = vsi->type, type_id, type_size = 0; const struct btf_type *var_type = btf_type_by_id(env->btf, var_type_id); if (!var_type || !btf_type_is_var(var_type)) { btf_verifier_log_vsi(env, v->t, vsi, "Not a VAR kind member"); return -EINVAL; } if (!env_type_is_resolve_sink(env, var_type) && !env_type_is_resolved(env, var_type_id)) { env_stack_set_next_member(env, i + 1); return env_stack_push(env, var_type, var_type_id); } type_id = var_type->type; if (!btf_type_id_size(btf, &type_id, &type_size)) { btf_verifier_log_vsi(env, v->t, vsi, "Invalid type"); return -EINVAL; } if (vsi->size < type_size) { btf_verifier_log_vsi(env, v->t, vsi, "Invalid size"); return -EINVAL; } } env_stack_pop_resolved(env, 0, 0); return 0; } static void btf_datasec_log(struct btf_verifier_env *env, const struct btf_type *t) { btf_verifier_log(env, "size=%u vlen=%u", t->size, btf_type_vlen(t)); } static void btf_datasec_show(const struct btf *btf, const struct btf_type *t, u32 type_id, void *data, u8 bits_offset, struct btf_show *show) { const struct btf_var_secinfo *vsi; const struct btf_type *var; u32 i; if (!btf_show_start_type(show, t, type_id, data)) return; btf_show_type_value(show, "section (\"%s\") = {", __btf_name_by_offset(btf, t->name_off)); for_each_vsi(i, t, vsi) { var = btf_type_by_id(btf, vsi->type); if (i) btf_show(show, ","); btf_type_ops(var)->show(btf, var, vsi->type, data + vsi->offset, bits_offset, show); } btf_show_end_type(show); } static const struct btf_kind_operations datasec_ops = { .check_meta = btf_datasec_check_meta, .resolve = btf_datasec_resolve, .check_member = btf_df_check_member, .check_kflag_member = btf_df_check_kflag_member, .log_details = btf_datasec_log, .show = btf_datasec_show, }; static s32 btf_float_check_meta(struct btf_verifier_env *env, const struct btf_type *t, u32 meta_left) { if (btf_type_vlen(t)) { btf_verifier_log_type(env, t, "vlen != 0"); return -EINVAL; } if (btf_type_kflag(t)) { btf_verifier_log_type(env, t, "Invalid btf_info kind_flag"); return -EINVAL; } if (t->size != 2 && t->size != 4 && t->size != 8 && t->size != 12 && t->size != 16) { btf_verifier_log_type(env, t, "Invalid type_size"); return -EINVAL; } btf_verifier_log_type(env, t, NULL); return 0; } static int btf_float_check_member(struct btf_verifier_env *env, const struct btf_type *struct_type, const struct btf_member *member, const struct btf_type *member_type) { u64 start_offset_bytes; u64 end_offset_bytes; u64 misalign_bits; u64 align_bytes; u64 align_bits; /* Different architectures have different alignment requirements, so * here we check only for the reasonable minimum. This way we ensure * that types after CO-RE can pass the kernel BTF verifier. */ align_bytes = min_t(u64, sizeof(void *), member_type->size); align_bits = align_bytes * BITS_PER_BYTE; div64_u64_rem(member->offset, align_bits, &misalign_bits); if (misalign_bits) { btf_verifier_log_member(env, struct_type, member, "Member is not properly aligned"); return -EINVAL; } start_offset_bytes = member->offset / BITS_PER_BYTE; end_offset_bytes = start_offset_bytes + member_type->size; if (end_offset_bytes > struct_type->size) { btf_verifier_log_member(env, struct_type, member, "Member exceeds struct_size"); return -EINVAL; } return 0; } static void btf_float_log(struct btf_verifier_env *env, const struct btf_type *t) { btf_verifier_log(env, "size=%u", t->size); } static const struct btf_kind_operations float_ops = { .check_meta = btf_float_check_meta, .resolve = btf_df_resolve, .check_member = btf_float_check_member, .check_kflag_member = btf_generic_check_kflag_member, .log_details = btf_float_log, .show = btf_df_show, }; static s32 btf_decl_tag_check_meta(struct btf_verifier_env *env, const struct btf_type *t, u32 meta_left) { const struct btf_decl_tag *tag; u32 meta_needed = sizeof(*tag); s32 component_idx; const char *value; if (meta_left < meta_needed) { btf_verifier_log_basic(env, t, "meta_left:%u meta_needed:%u", meta_left, meta_needed); return -EINVAL; } value = btf_name_by_offset(env->btf, t->name_off); if (!value || !value[0]) { btf_verifier_log_type(env, t, "Invalid value"); return -EINVAL; } if (btf_type_vlen(t)) { btf_verifier_log_type(env, t, "vlen != 0"); return -EINVAL; } component_idx = btf_type_decl_tag(t)->component_idx; if (component_idx < -1) { btf_verifier_log_type(env, t, "Invalid component_idx"); return -EINVAL; } btf_verifier_log_type(env, t, NULL); return meta_needed; } static int btf_decl_tag_resolve(struct btf_verifier_env *env, const struct resolve_vertex *v) { const struct btf_type *next_type; const struct btf_type *t = v->t; u32 next_type_id = t->type; struct btf *btf = env->btf; s32 component_idx; u32 vlen; next_type = btf_type_by_id(btf, next_type_id); if (!next_type || !btf_type_is_decl_tag_target(next_type)) { btf_verifier_log_type(env, v->t, "Invalid type_id"); return -EINVAL; } if (!env_type_is_resolve_sink(env, next_type) && !env_type_is_resolved(env, next_type_id)) return env_stack_push(env, next_type, next_type_id); component_idx = btf_type_decl_tag(t)->component_idx; if (component_idx != -1) { if (btf_type_is_var(next_type) || btf_type_is_typedef(next_type)) { btf_verifier_log_type(env, v->t, "Invalid component_idx"); return -EINVAL; } if (btf_type_is_struct(next_type)) { vlen = btf_type_vlen(next_type); } else { /* next_type should be a function */ next_type = btf_type_by_id(btf, next_type->type); vlen = btf_type_vlen(next_type); } if ((u32)component_idx >= vlen) { btf_verifier_log_type(env, v->t, "Invalid component_idx"); return -EINVAL; } } env_stack_pop_resolved(env, next_type_id, 0); return 0; } static void btf_decl_tag_log(struct btf_verifier_env *env, const struct btf_type *t) { btf_verifier_log(env, "type=%u component_idx=%d", t->type, btf_type_decl_tag(t)->component_idx); } static const struct btf_kind_operations decl_tag_ops = { .check_meta = btf_decl_tag_check_meta, .resolve = btf_decl_tag_resolve, .check_member = btf_df_check_member, .check_kflag_member = btf_df_check_kflag_member, .log_details = btf_decl_tag_log, .show = btf_df_show, }; static int btf_func_proto_check(struct btf_verifier_env *env, const struct btf_type *t) { const struct btf_type *ret_type; const struct btf_param *args; const struct btf *btf; u16 nr_args, i; int err; btf = env->btf; args = (const struct btf_param *)(t + 1); nr_args = btf_type_vlen(t); /* Check func return type which could be "void" (t->type == 0) */ if (t->type) { u32 ret_type_id = t->type; ret_type = btf_type_by_id(btf, ret_type_id); if (!ret_type) { btf_verifier_log_type(env, t, "Invalid return type"); return -EINVAL; } if (btf_type_is_resolve_source_only(ret_type)) { btf_verifier_log_type(env, t, "Invalid return type"); return -EINVAL; } if (btf_type_needs_resolve(ret_type) && !env_type_is_resolved(env, ret_type_id)) { err = btf_resolve(env, ret_type, ret_type_id); if (err) return err; } /* Ensure the return type is a type that has a size */ if (!btf_type_id_size(btf, &ret_type_id, NULL)) { btf_verifier_log_type(env, t, "Invalid return type"); return -EINVAL; } } if (!nr_args) return 0; /* Last func arg type_id could be 0 if it is a vararg */ if (!args[nr_args - 1].type) { if (args[nr_args - 1].name_off) { btf_verifier_log_type(env, t, "Invalid arg#%u", nr_args); return -EINVAL; } nr_args--; } for (i = 0; i < nr_args; i++) { const struct btf_type *arg_type; u32 arg_type_id; arg_type_id = args[i].type; arg_type = btf_type_by_id(btf, arg_type_id); if (!arg_type) { btf_verifier_log_type(env, t, "Invalid arg#%u", i + 1); return -EINVAL; } if (btf_type_is_resolve_source_only(arg_type)) { btf_verifier_log_type(env, t, "Invalid arg#%u", i + 1); return -EINVAL; } if (args[i].name_off && (!btf_name_offset_valid(btf, args[i].name_off) || !btf_name_valid_identifier(btf, args[i].name_off))) { btf_verifier_log_type(env, t, "Invalid arg#%u", i + 1); return -EINVAL; } if (btf_type_needs_resolve(arg_type) && !env_type_is_resolved(env, arg_type_id)) { err = btf_resolve(env, arg_type, arg_type_id); if (err) return err; } if (!btf_type_id_size(btf, &arg_type_id, NULL)) { btf_verifier_log_type(env, t, "Invalid arg#%u", i + 1); return -EINVAL; } } return 0; } static int btf_func_check(struct btf_verifier_env *env, const struct btf_type *t) { const struct btf_type *proto_type; const struct btf_param *args; const struct btf *btf; u16 nr_args, i; btf = env->btf; proto_type = btf_type_by_id(btf, t->type); if (!proto_type || !btf_type_is_func_proto(proto_type)) { btf_verifier_log_type(env, t, "Invalid type_id"); return -EINVAL; } args = (const struct btf_param *)(proto_type + 1); nr_args = btf_type_vlen(proto_type); for (i = 0; i < nr_args; i++) { if (!args[i].name_off && args[i].type) { btf_verifier_log_type(env, t, "Invalid arg#%u", i + 1); return -EINVAL; } } return 0; } static const struct btf_kind_operations * const kind_ops[NR_BTF_KINDS] = { [BTF_KIND_INT] = &int_ops, [BTF_KIND_PTR] = &ptr_ops, [BTF_KIND_ARRAY] = &array_ops, [BTF_KIND_STRUCT] = &struct_ops, [BTF_KIND_UNION] = &struct_ops, [BTF_KIND_ENUM] = &enum_ops, [BTF_KIND_FWD] = &fwd_ops, [BTF_KIND_TYPEDEF] = &modifier_ops, [BTF_KIND_VOLATILE] = &modifier_ops, [BTF_KIND_CONST] = &modifier_ops, [BTF_KIND_RESTRICT] = &modifier_ops, [BTF_KIND_FUNC] = &func_ops, [BTF_KIND_FUNC_PROTO] = &func_proto_ops, [BTF_KIND_VAR] = &var_ops, [BTF_KIND_DATASEC] = &datasec_ops, [BTF_KIND_FLOAT] = &float_ops, [BTF_KIND_DECL_TAG] = &decl_tag_ops, [BTF_KIND_TYPE_TAG] = &modifier_ops, [BTF_KIND_ENUM64] = &enum64_ops, }; static s32 btf_check_meta(struct btf_verifier_env *env, const struct btf_type *t, u32 meta_left) { u32 saved_meta_left = meta_left; s32 var_meta_size; if (meta_left < sizeof(*t)) { btf_verifier_log(env, "[%u] meta_left:%u meta_needed:%zu", env->log_type_id, meta_left, sizeof(*t)); return -EINVAL; } meta_left -= sizeof(*t); if (t->info & ~BTF_INFO_MASK) { btf_verifier_log(env, "[%u] Invalid btf_info:%x", env->log_type_id, t->info); return -EINVAL; } if (BTF_INFO_KIND(t->info) > BTF_KIND_MAX || BTF_INFO_KIND(t->info) == BTF_KIND_UNKN) { btf_verifier_log(env, "[%u] Invalid kind:%u", env->log_type_id, BTF_INFO_KIND(t->info)); return -EINVAL; } if (!btf_name_offset_valid(env->btf, t->name_off)) { btf_verifier_log(env, "[%u] Invalid name_offset:%u", env->log_type_id, t->name_off); return -EINVAL; } var_meta_size = btf_type_ops(t)->check_meta(env, t, meta_left); if (var_meta_size < 0) return var_meta_size; meta_left -= var_meta_size; return saved_meta_left - meta_left; } static int btf_check_all_metas(struct btf_verifier_env *env) { struct btf *btf = env->btf; struct btf_header *hdr; void *cur, *end; hdr = &btf->hdr; cur = btf->nohdr_data + hdr->type_off; end = cur + hdr->type_len; env->log_type_id = btf->base_btf ? btf->start_id : 1; while (cur < end) { struct btf_type *t = cur; s32 meta_size; meta_size = btf_check_meta(env, t, end - cur); if (meta_size < 0) return meta_size; btf_add_type(env, t); cur += meta_size; env->log_type_id++; } return 0; } static bool btf_resolve_valid(struct btf_verifier_env *env, const struct btf_type *t, u32 type_id) { struct btf *btf = env->btf; if (!env_type_is_resolved(env, type_id)) return false; if (btf_type_is_struct(t) || btf_type_is_datasec(t)) return !btf_resolved_type_id(btf, type_id) && !btf_resolved_type_size(btf, type_id); if (btf_type_is_decl_tag(t) || btf_type_is_func(t)) return btf_resolved_type_id(btf, type_id) && !btf_resolved_type_size(btf, type_id); if (btf_type_is_modifier(t) || btf_type_is_ptr(t) || btf_type_is_var(t)) { t = btf_type_id_resolve(btf, &type_id); return t && !btf_type_is_modifier(t) && !btf_type_is_var(t) && !btf_type_is_datasec(t); } if (btf_type_is_array(t)) { const struct btf_array *array = btf_type_array(t); const struct btf_type *elem_type; u32 elem_type_id = array->type; u32 elem_size; elem_type = btf_type_id_size(btf, &elem_type_id, &elem_size); return elem_type && !btf_type_is_modifier(elem_type) && (array->nelems * elem_size == btf_resolved_type_size(btf, type_id)); } return false; } static int btf_resolve(struct btf_verifier_env *env, const struct btf_type *t, u32 type_id) { u32 save_log_type_id = env->log_type_id; const struct resolve_vertex *v; int err = 0; env->resolve_mode = RESOLVE_TBD; env_stack_push(env, t, type_id); while (!err && (v = env_stack_peak(env))) { env->log_type_id = v->type_id; err = btf_type_ops(v->t)->resolve(env, v); } env->log_type_id = type_id; if (err == -E2BIG) { btf_verifier_log_type(env, t, "Exceeded max resolving depth:%u", MAX_RESOLVE_DEPTH); } else if (err == -EEXIST) { btf_verifier_log_type(env, t, "Loop detected"); } /* Final sanity check */ if (!err && !btf_resolve_valid(env, t, type_id)) { btf_verifier_log_type(env, t, "Invalid resolve state"); err = -EINVAL; } env->log_type_id = save_log_type_id; return err; } static int btf_check_all_types(struct btf_verifier_env *env) { struct btf *btf = env->btf; const struct btf_type *t; u32 type_id, i; int err; err = env_resolve_init(env); if (err) return err; env->phase++; for (i = btf->base_btf ? 0 : 1; i < btf->nr_types; i++) { type_id = btf->start_id + i; t = btf_type_by_id(btf, type_id); env->log_type_id = type_id; if (btf_type_needs_resolve(t) && !env_type_is_resolved(env, type_id)) { err = btf_resolve(env, t, type_id); if (err) return err; } if (btf_type_is_func_proto(t)) { err = btf_func_proto_check(env, t); if (err) return err; } } return 0; } static int btf_parse_type_sec(struct btf_verifier_env *env) { const struct btf_header *hdr = &env->btf->hdr; int err; /* Type section must align to 4 bytes */ if (hdr->type_off & (sizeof(u32) - 1)) { btf_verifier_log(env, "Unaligned type_off"); return -EINVAL; } if (!env->btf->base_btf && !hdr->type_len) { btf_verifier_log(env, "No type found"); return -EINVAL; } err = btf_check_all_metas(env); if (err) return err; return btf_check_all_types(env); } static int btf_parse_str_sec(struct btf_verifier_env *env) { const struct btf_header *hdr; struct btf *btf = env->btf; const char *start, *end; hdr = &btf->hdr; start = btf->nohdr_data + hdr->str_off; end = start + hdr->str_len; if (end != btf->data + btf->data_size) { btf_verifier_log(env, "String section is not at the end"); return -EINVAL; } btf->strings = start; if (btf->base_btf && !hdr->str_len) return 0; if (!hdr->str_len || hdr->str_len - 1 > BTF_MAX_NAME_OFFSET || end[-1]) { btf_verifier_log(env, "Invalid string section"); return -EINVAL; } if (!btf->base_btf && start[0]) { btf_verifier_log(env, "Invalid string section"); return -EINVAL; } return 0; } static const size_t btf_sec_info_offset[] = { offsetof(struct btf_header, type_off), offsetof(struct btf_header, str_off), }; static int btf_sec_info_cmp(const void *a, const void *b) { const struct btf_sec_info *x = a; const struct btf_sec_info *y = b; return (int)(x->off - y->off) ? : (int)(x->len - y->len); } static int btf_check_sec_info(struct btf_verifier_env *env, u32 btf_data_size) { struct btf_sec_info secs[ARRAY_SIZE(btf_sec_info_offset)]; u32 total, expected_total, i; const struct btf_header *hdr; const struct btf *btf; btf = env->btf; hdr = &btf->hdr; /* Populate the secs from hdr */ for (i = 0; i < ARRAY_SIZE(btf_sec_info_offset); i++) secs[i] = *(struct btf_sec_info *)((void *)hdr + btf_sec_info_offset[i]); sort(secs, ARRAY_SIZE(btf_sec_info_offset), sizeof(struct btf_sec_info), btf_sec_info_cmp, NULL); /* Check for gaps and overlap among sections */ total = 0; expected_total = btf_data_size - hdr->hdr_len; for (i = 0; i < ARRAY_SIZE(btf_sec_info_offset); i++) { if (expected_total < secs[i].off) { btf_verifier_log(env, "Invalid section offset"); return -EINVAL; } if (total < secs[i].off) { /* gap */ btf_verifier_log(env, "Unsupported section found"); return -EINVAL; } if (total > secs[i].off) { btf_verifier_log(env, "Section overlap found"); return -EINVAL; } if (expected_total - total < secs[i].len) { btf_verifier_log(env, "Total section length too long"); return -EINVAL; } total += secs[i].len; } /* There is data other than hdr and known sections */ if (expected_total != total) { btf_verifier_log(env, "Unsupported section found"); return -EINVAL; } return 0; } static int btf_parse_hdr(struct btf_verifier_env *env) { u32 hdr_len, hdr_copy, btf_data_size; const struct btf_header *hdr; struct btf *btf; btf = env->btf; btf_data_size = btf->data_size; if (btf_data_size < offsetofend(struct btf_header, hdr_len)) { btf_verifier_log(env, "hdr_len not found"); return -EINVAL; } hdr = btf->data; hdr_len = hdr->hdr_len; if (btf_data_size < hdr_len) { btf_verifier_log(env, "btf_header not found"); return -EINVAL; } /* Ensure the unsupported header fields are zero */ if (hdr_len > sizeof(btf->hdr)) { u8 *expected_zero = btf->data + sizeof(btf->hdr); u8 *end = btf->data + hdr_len; for (; expected_zero < end; expected_zero++) { if (*expected_zero) { btf_verifier_log(env, "Unsupported btf_header"); return -E2BIG; } } } hdr_copy = min_t(u32, hdr_len, sizeof(btf->hdr)); memcpy(&btf->hdr, btf->data, hdr_copy); hdr = &btf->hdr; btf_verifier_log_hdr(env, btf_data_size); if (hdr->magic != BTF_MAGIC) { btf_verifier_log(env, "Invalid magic"); return -EINVAL; } if (hdr->version != BTF_VERSION) { btf_verifier_log(env, "Unsupported version"); return -ENOTSUPP; } if (hdr->flags) { btf_verifier_log(env, "Unsupported flags"); return -ENOTSUPP; } if (!btf->base_btf && btf_data_size == hdr->hdr_len) { btf_verifier_log(env, "No data"); return -EINVAL; } return btf_check_sec_info(env, btf_data_size); } static const char *alloc_obj_fields[] = { "bpf_spin_lock", "bpf_list_head", "bpf_list_node", "bpf_rb_root", "bpf_rb_node", "bpf_refcount", }; static struct btf_struct_metas * btf_parse_struct_metas(struct bpf_verifier_log *log, struct btf *btf) { struct btf_struct_metas *tab = NULL; struct btf_id_set *aof; int i, n, id, ret; BUILD_BUG_ON(offsetof(struct btf_id_set, cnt) != 0); BUILD_BUG_ON(sizeof(struct btf_id_set) != sizeof(u32)); aof = kmalloc(sizeof(*aof), GFP_KERNEL | __GFP_NOWARN); if (!aof) return ERR_PTR(-ENOMEM); aof->cnt = 0; for (i = 0; i < ARRAY_SIZE(alloc_obj_fields); i++) { /* Try to find whether this special type exists in user BTF, and * if so remember its ID so we can easily find it among members * of structs that we iterate in the next loop. */ struct btf_id_set *new_aof; id = btf_find_by_name_kind(btf, alloc_obj_fields[i], BTF_KIND_STRUCT); if (id < 0) continue; new_aof = krealloc(aof, struct_size(new_aof, ids, aof->cnt + 1), GFP_KERNEL | __GFP_NOWARN); if (!new_aof) { ret = -ENOMEM; goto free_aof; } aof = new_aof; aof->ids[aof->cnt++] = id; } n = btf_nr_types(btf); for (i = 1; i < n; i++) { /* Try to find if there are kptrs in user BTF and remember their ID */ struct btf_id_set *new_aof; struct btf_field_info tmp; const struct btf_type *t; t = btf_type_by_id(btf, i); if (!t) { ret = -EINVAL; goto free_aof; } ret = btf_find_kptr(btf, t, 0, 0, &tmp, BPF_KPTR); if (ret != BTF_FIELD_FOUND) continue; new_aof = krealloc(aof, struct_size(new_aof, ids, aof->cnt + 1), GFP_KERNEL | __GFP_NOWARN); if (!new_aof) { ret = -ENOMEM; goto free_aof; } aof = new_aof; aof->ids[aof->cnt++] = i; } if (!aof->cnt) { kfree(aof); return NULL; } sort(&aof->ids, aof->cnt, sizeof(aof->ids[0]), btf_id_cmp_func, NULL); for (i = 1; i < n; i++) { struct btf_struct_metas *new_tab; const struct btf_member *member; struct btf_struct_meta *type; struct btf_record *record; const struct btf_type *t; int j, tab_cnt; t = btf_type_by_id(btf, i); if (!__btf_type_is_struct(t)) continue; cond_resched(); for_each_member(j, t, member) { if (btf_id_set_contains(aof, member->type)) goto parse; } continue; parse: tab_cnt = tab ? tab->cnt : 0; new_tab = krealloc(tab, struct_size(new_tab, types, tab_cnt + 1), GFP_KERNEL | __GFP_NOWARN); if (!new_tab) { ret = -ENOMEM; goto free; } if (!tab) new_tab->cnt = 0; tab = new_tab; type = &tab->types[tab->cnt]; type->btf_id = i; record = btf_parse_fields(btf, t, BPF_SPIN_LOCK | BPF_RES_SPIN_LOCK | BPF_LIST_HEAD | BPF_LIST_NODE | BPF_RB_ROOT | BPF_RB_NODE | BPF_REFCOUNT | BPF_KPTR, t->size); /* The record cannot be unset, treat it as an error if so */ if (IS_ERR_OR_NULL(record)) { ret = PTR_ERR_OR_ZERO(record) ?: -EFAULT; goto free; } type->record = record; tab->cnt++; } kfree(aof); return tab; free: btf_struct_metas_free(tab); free_aof: kfree(aof); return ERR_PTR(ret); } struct btf_struct_meta *btf_find_struct_meta(const struct btf *btf, u32 btf_id) { struct btf_struct_metas *tab; BUILD_BUG_ON(offsetof(struct btf_struct_meta, btf_id) != 0); tab = btf->struct_meta_tab; if (!tab) return NULL; return bsearch(&btf_id, tab->types, tab->cnt, sizeof(tab->types[0]), btf_id_cmp_func); } static int btf_check_type_tags(struct btf_verifier_env *env, struct btf *btf, int start_id) { int i, n, good_id = start_id - 1; bool in_tags; n = btf_nr_types(btf); for (i = start_id; i < n; i++) { const struct btf_type *t; int chain_limit = 32; u32 cur_id = i; t = btf_type_by_id(btf, i); if (!t) return -EINVAL; if (!btf_type_is_modifier(t)) continue; cond_resched(); in_tags = btf_type_is_type_tag(t); while (btf_type_is_modifier(t)) { if (!chain_limit--) { btf_verifier_log(env, "Max chain length or cycle detected"); return -ELOOP; } if (btf_type_is_type_tag(t)) { if (!in_tags) { btf_verifier_log(env, "Type tags don't precede modifiers"); return -EINVAL; } } else if (in_tags) { in_tags = false; } if (cur_id <= good_id) break; /* Move to next type */ cur_id = t->type; t = btf_type_by_id(btf, cur_id); if (!t) return -EINVAL; } good_id = i; } return 0; } static int finalize_log(struct bpf_verifier_log *log, bpfptr_t uattr, u32 uattr_size) { u32 log_true_size; int err; err = bpf_vlog_finalize(log, &log_true_size); if (uattr_size >= offsetofend(union bpf_attr, btf_log_true_size) && copy_to_bpfptr_offset(uattr, offsetof(union bpf_attr, btf_log_true_size), &log_true_size, sizeof(log_true_size))) err = -EFAULT; return err; } static struct btf *btf_parse(const union bpf_attr *attr, bpfptr_t uattr, u32 uattr_size) { bpfptr_t btf_data = make_bpfptr(attr->btf, uattr.is_kernel); char __user *log_ubuf = u64_to_user_ptr(attr->btf_log_buf); struct btf_struct_metas *struct_meta_tab; struct btf_verifier_env *env = NULL; struct btf *btf = NULL; u8 *data; int err, ret; if (attr->btf_size > BTF_MAX_SIZE) return ERR_PTR(-E2BIG); env = kzalloc(sizeof(*env), GFP_KERNEL | __GFP_NOWARN); if (!env) return ERR_PTR(-ENOMEM); /* user could have requested verbose verifier output * and supplied buffer to store the verification trace */ err = bpf_vlog_init(&env->log, attr->btf_log_level, log_ubuf, attr->btf_log_size); if (err) goto errout_free; btf = kzalloc(sizeof(*btf), GFP_KERNEL | __GFP_NOWARN); if (!btf) { err = -ENOMEM; goto errout; } env->btf = btf; data = kvmalloc(attr->btf_size, GFP_KERNEL | __GFP_NOWARN); if (!data) { err = -ENOMEM; goto errout; } btf->data = data; btf->data_size = attr->btf_size; if (copy_from_bpfptr(data, btf_data, attr->btf_size)) { err = -EFAULT; goto errout; } err = btf_parse_hdr(env); if (err) goto errout; btf->nohdr_data = btf->data + btf->hdr.hdr_len; err = btf_parse_str_sec(env); if (err) goto errout; err = btf_parse_type_sec(env); if (err) goto errout; err = btf_check_type_tags(env, btf, 1); if (err) goto errout; struct_meta_tab = btf_parse_struct_metas(&env->log, btf); if (IS_ERR(struct_meta_tab)) { err = PTR_ERR(struct_meta_tab); goto errout; } btf->struct_meta_tab = struct_meta_tab; if (struct_meta_tab) { int i; for (i = 0; i < struct_meta_tab->cnt; i++) { err = btf_check_and_fixup_fields(btf, struct_meta_tab->types[i].record); if (err < 0) goto errout_meta; } } err = finalize_log(&env->log, uattr, uattr_size); if (err) goto errout_free; btf_verifier_env_free(env); refcount_set(&btf->refcnt, 1); return btf; errout_meta: btf_free_struct_meta_tab(btf); errout: /* overwrite err with -ENOSPC or -EFAULT */ ret = finalize_log(&env->log, uattr, uattr_size); if (ret) err = ret; errout_free: btf_verifier_env_free(env); if (btf) btf_free(btf); return ERR_PTR(err); } extern char __start_BTF[]; extern char __stop_BTF[]; extern struct btf *btf_vmlinux; #define BPF_MAP_TYPE(_id, _ops) #define BPF_LINK_TYPE(_id, _name) static union { struct bpf_ctx_convert { #define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \ prog_ctx_type _id##_prog; \ kern_ctx_type _id##_kern; #include <linux/bpf_types.h> #undef BPF_PROG_TYPE } *__t; /* 't' is written once under lock. Read many times. */ const struct btf_type *t; } bpf_ctx_convert; enum { #define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \ __ctx_convert##_id, #include <linux/bpf_types.h> #undef BPF_PROG_TYPE __ctx_convert_unused, /* to avoid empty enum in extreme .config */ }; static u8 bpf_ctx_convert_map[] = { #define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \ [_id] = __ctx_convert##_id, #include <linux/bpf_types.h> #undef BPF_PROG_TYPE 0, /* avoid empty array */ }; #undef BPF_MAP_TYPE #undef BPF_LINK_TYPE static const struct btf_type *find_canonical_prog_ctx_type(enum bpf_prog_type prog_type) { const struct btf_type *conv_struct; const struct btf_member *ctx_type; conv_struct = bpf_ctx_convert.t; if (!conv_struct) return NULL; /* prog_type is valid bpf program type. No need for bounds check. */ ctx_type = btf_type_member(conv_struct) + bpf_ctx_convert_map[prog_type] * 2; /* ctx_type is a pointer to prog_ctx_type in vmlinux. * Like 'struct __sk_buff' */ return btf_type_by_id(btf_vmlinux, ctx_type->type); } static int find_kern_ctx_type_id(enum bpf_prog_type prog_type) { const struct btf_type *conv_struct; const struct btf_member *ctx_type; conv_struct = bpf_ctx_convert.t; if (!conv_struct) return -EFAULT; /* prog_type is valid bpf program type. No need for bounds check. */ ctx_type = btf_type_member(conv_struct) + bpf_ctx_convert_map[prog_type] * 2 + 1; /* ctx_type is a pointer to prog_ctx_type in vmlinux. * Like 'struct sk_buff' */ return ctx_type->type; } bool btf_is_projection_of(const char *pname, const char *tname) { if (strcmp(pname, "__sk_buff") == 0 && strcmp(tname, "sk_buff") == 0) return true; if (strcmp(pname, "xdp_md") == 0 && strcmp(tname, "xdp_buff") == 0) return true; return false; } bool btf_is_prog_ctx_type(struct bpf_verifier_log *log, const struct btf *btf, const struct btf_type *t, enum bpf_prog_type prog_type, int arg) { const struct btf_type *ctx_type; const char *tname, *ctx_tname; t = btf_type_by_id(btf, t->type); /* KPROBE programs allow bpf_user_pt_regs_t typedef, which we need to * check before we skip all the typedef below. */ if (prog_type == BPF_PROG_TYPE_KPROBE) { while (btf_type_is_modifier(t) && !btf_type_is_typedef(t)) t = btf_type_by_id(btf, t->type); if (btf_type_is_typedef(t)) { tname = btf_name_by_offset(btf, t->name_off); if (tname && strcmp(tname, "bpf_user_pt_regs_t") == 0) return true; } } while (btf_type_is_modifier(t)) t = btf_type_by_id(btf, t->type); if (!btf_type_is_struct(t)) { /* Only pointer to struct is supported for now. * That means that BPF_PROG_TYPE_TRACEPOINT with BTF * is not supported yet. * BPF_PROG_TYPE_RAW_TRACEPOINT is fine. */ return false; } tname = btf_name_by_offset(btf, t->name_off); if (!tname) { bpf_log(log, "arg#%d struct doesn't have a name\n", arg); return false; } ctx_type = find_canonical_prog_ctx_type(prog_type); if (!ctx_type) { bpf_log(log, "btf_vmlinux is malformed\n"); /* should not happen */ return false; } again: ctx_tname = btf_name_by_offset(btf_vmlinux, ctx_type->name_off); if (!ctx_tname) { /* should not happen */ bpf_log(log, "Please fix kernel include/linux/bpf_types.h\n"); return false; } /* program types without named context types work only with arg:ctx tag */ if (ctx_tname[0] == '\0') return false; /* only compare that prog's ctx type name is the same as * kernel expects. No need to compare field by field. * It's ok for bpf prog to do: * struct __sk_buff {}; * int socket_filter_bpf_prog(struct __sk_buff *skb) * { // no fields of skb are ever used } */ if (btf_is_projection_of(ctx_tname, tname)) return true; if (strcmp(ctx_tname, tname)) { /* bpf_user_pt_regs_t is a typedef, so resolve it to * underlying struct and check name again */ if (!btf_type_is_modifier(ctx_type)) return false; while (btf_type_is_modifier(ctx_type)) ctx_type = btf_type_by_id(btf_vmlinux, ctx_type->type); goto again; } return true; } /* forward declarations for arch-specific underlying types of * bpf_user_pt_regs_t; this avoids the need for arch-specific #ifdef * compilation guards below for BPF_PROG_TYPE_PERF_EVENT checks, but still * works correctly with __builtin_types_compatible_p() on respective * architectures */ struct user_regs_struct; struct user_pt_regs; static int btf_validate_prog_ctx_type(struct bpf_verifier_log *log, const struct btf *btf, const struct btf_type *t, int arg, enum bpf_prog_type prog_type, enum bpf_attach_type attach_type) { const struct btf_type *ctx_type; const char *tname, *ctx_tname; if (!btf_is_ptr(t)) { bpf_log(log, "arg#%d type isn't a pointer\n", arg); return -EINVAL; } t = btf_type_by_id(btf, t->type); /* KPROBE and PERF_EVENT programs allow bpf_user_pt_regs_t typedef */ if (prog_type == BPF_PROG_TYPE_KPROBE || prog_type == BPF_PROG_TYPE_PERF_EVENT) { while (btf_type_is_modifier(t) && !btf_type_is_typedef(t)) t = btf_type_by_id(btf, t->type); if (btf_type_is_typedef(t)) { tname = btf_name_by_offset(btf, t->name_off); if (tname && strcmp(tname, "bpf_user_pt_regs_t") == 0) return 0; } } /* all other program types don't use typedefs for context type */ while (btf_type_is_modifier(t)) t = btf_type_by_id(btf, t->type); /* `void *ctx __arg_ctx` is always valid */ if (btf_type_is_void(t)) return 0; tname = btf_name_by_offset(btf, t->name_off); if (str_is_empty(tname)) { bpf_log(log, "arg#%d type doesn't have a name\n", arg); return -EINVAL; } /* special cases */ switch (prog_type) { case BPF_PROG_TYPE_KPROBE: if (__btf_type_is_struct(t) && strcmp(tname, "pt_regs") == 0) return 0; break; case BPF_PROG_TYPE_PERF_EVENT: if (__builtin_types_compatible_p(bpf_user_pt_regs_t, struct pt_regs) && __btf_type_is_struct(t) && strcmp(tname, "pt_regs") == 0) return 0; if (__builtin_types_compatible_p(bpf_user_pt_regs_t, struct user_pt_regs) && __btf_type_is_struct(t) && strcmp(tname, "user_pt_regs") == 0) return 0; if (__builtin_types_compatible_p(bpf_user_pt_regs_t, struct user_regs_struct) && __btf_type_is_struct(t) && strcmp(tname, "user_regs_struct") == 0) return 0; break; case BPF_PROG_TYPE_RAW_TRACEPOINT: case BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE: /* allow u64* as ctx */ if (btf_is_int(t) && t->size == 8) return 0; break; case BPF_PROG_TYPE_TRACING: switch (attach_type) { case BPF_TRACE_RAW_TP: /* tp_btf program is TRACING, so need special case here */ if (__btf_type_is_struct(t) && strcmp(tname, "bpf_raw_tracepoint_args") == 0) return 0; /* allow u64* as ctx */ if (btf_is_int(t) && t->size == 8) return 0; break; case BPF_TRACE_ITER: /* allow struct bpf_iter__xxx types only */ if (__btf_type_is_struct(t) && strncmp(tname, "bpf_iter__", sizeof("bpf_iter__") - 1) == 0) return 0; break; case BPF_TRACE_FENTRY: case BPF_TRACE_FEXIT: case BPF_MODIFY_RETURN: /* allow u64* as ctx */ if (btf_is_int(t) && t->size == 8) return 0; break; default: break; } break; case BPF_PROG_TYPE_LSM: case BPF_PROG_TYPE_STRUCT_OPS: /* allow u64* as ctx */ if (btf_is_int(t) && t->size == 8) return 0; break; case BPF_PROG_TYPE_TRACEPOINT: case BPF_PROG_TYPE_SYSCALL: case BPF_PROG_TYPE_EXT: return 0; /* anything goes */ default: break; } ctx_type = find_canonical_prog_ctx_type(prog_type); if (!ctx_type) { /* should not happen */ bpf_log(log, "btf_vmlinux is malformed\n"); return -EINVAL; } /* resolve typedefs and check that underlying structs are matching as well */ while (btf_type_is_modifier(ctx_type)) ctx_type = btf_type_by_id(btf_vmlinux, ctx_type->type); /* if program type doesn't have distinctly named struct type for * context, then __arg_ctx argument can only be `void *`, which we * already checked above */ if (!__btf_type_is_struct(ctx_type)) { bpf_log(log, "arg#%d should be void pointer\n", arg); return -EINVAL; } ctx_tname = btf_name_by_offset(btf_vmlinux, ctx_type->name_off); if (!__btf_type_is_struct(t) || strcmp(ctx_tname, tname) != 0) { bpf_log(log, "arg#%d should be `struct %s *`\n", arg, ctx_tname); return -EINVAL; } return 0; } static int btf_translate_to_vmlinux(struct bpf_verifier_log *log, struct btf *btf, const struct btf_type *t, enum bpf_prog_type prog_type, int arg) { if (!btf_is_prog_ctx_type(log, btf, t, prog_type, arg)) return -ENOENT; return find_kern_ctx_type_id(prog_type); } int get_kern_ctx_btf_id(struct bpf_verifier_log *log, enum bpf_prog_type prog_type) { const struct btf_member *kctx_member; const struct btf_type *conv_struct; const struct btf_type *kctx_type; u32 kctx_type_id; conv_struct = bpf_ctx_convert.t; /* get member for kernel ctx type */ kctx_member = btf_type_member(conv_struct) + bpf_ctx_convert_map[prog_type] * 2 + 1; kctx_type_id = kctx_member->type; kctx_type = btf_type_by_id(btf_vmlinux, kctx_type_id); if (!btf_type_is_struct(kctx_type)) { bpf_log(log, "kern ctx type id %u is not a struct\n", kctx_type_id); return -EINVAL; } return kctx_type_id; } BTF_ID_LIST_SINGLE(bpf_ctx_convert_btf_id, struct, bpf_ctx_convert) static struct btf *btf_parse_base(struct btf_verifier_env *env, const char *name, void *data, unsigned int data_size) { struct btf *btf = NULL; int err; if (!IS_ENABLED(CONFIG_DEBUG_INFO_BTF)) return ERR_PTR(-ENOENT); btf = kzalloc(sizeof(*btf), GFP_KERNEL | __GFP_NOWARN); if (!btf) { err = -ENOMEM; goto errout; } env->btf = btf; btf->data = data; btf->data_size = data_size; btf->kernel_btf = true; snprintf(btf->name, sizeof(btf->name), "%s", name); err = btf_parse_hdr(env); if (err) goto errout; btf->nohdr_data = btf->data + btf->hdr.hdr_len; err = btf_parse_str_sec(env); if (err) goto errout; err = btf_check_all_metas(env); if (err) goto errout; err = btf_check_type_tags(env, btf, 1); if (err) goto errout; refcount_set(&btf->refcnt, 1); return btf; errout: if (btf) { kvfree(btf->types); kfree(btf); } return ERR_PTR(err); } struct btf *btf_parse_vmlinux(void) { struct btf_verifier_env *env = NULL; struct bpf_verifier_log *log; struct btf *btf; int err; env = kzalloc(sizeof(*env), GFP_KERNEL | __GFP_NOWARN); if (!env) return ERR_PTR(-ENOMEM); log = &env->log; log->level = BPF_LOG_KERNEL; btf = btf_parse_base(env, "vmlinux", __start_BTF, __stop_BTF - __start_BTF); if (IS_ERR(btf)) goto err_out; /* btf_parse_vmlinux() runs under bpf_verifier_lock */ bpf_ctx_convert.t = btf_type_by_id(btf, bpf_ctx_convert_btf_id[0]); err = btf_alloc_id(btf); if (err) { btf_free(btf); btf = ERR_PTR(err); } err_out: btf_verifier_env_free(env); return btf; } /* If .BTF_ids section was created with distilled base BTF, both base and * split BTF ids will need to be mapped to actual base/split ids for * BTF now that it has been relocated. */ static __u32 btf_relocate_id(const struct btf *btf, __u32 id) { if (!btf->base_btf || !btf->base_id_map) return id; return btf->base_id_map[id]; } #ifdef CONFIG_DEBUG_INFO_BTF_MODULES static struct btf *btf_parse_module(const char *module_name, const void *data, unsigned int data_size, void *base_data, unsigned int base_data_size) { struct btf *btf = NULL, *vmlinux_btf, *base_btf = NULL; struct btf_verifier_env *env = NULL; struct bpf_verifier_log *log; int err = 0; vmlinux_btf = bpf_get_btf_vmlinux(); if (IS_ERR(vmlinux_btf)) return vmlinux_btf; if (!vmlinux_btf) return ERR_PTR(-EINVAL); env = kzalloc(sizeof(*env), GFP_KERNEL | __GFP_NOWARN); if (!env) return ERR_PTR(-ENOMEM); log = &env->log; log->level = BPF_LOG_KERNEL; if (base_data) { base_btf = btf_parse_base(env, ".BTF.base", base_data, base_data_size); if (IS_ERR(base_btf)) { err = PTR_ERR(base_btf); goto errout; } } else { base_btf = vmlinux_btf; } btf = kzalloc(sizeof(*btf), GFP_KERNEL | __GFP_NOWARN); if (!btf) { err = -ENOMEM; goto errout; } env->btf = btf; btf->base_btf = base_btf; btf->start_id = base_btf->nr_types; btf->start_str_off = base_btf->hdr.str_len; btf->kernel_btf = true; snprintf(btf->name, sizeof(btf->name), "%s", module_name); btf->data = kvmemdup(data, data_size, GFP_KERNEL | __GFP_NOWARN); if (!btf->data) { err = -ENOMEM; goto errout; } btf->data_size = data_size; err = btf_parse_hdr(env); if (err) goto errout; btf->nohdr_data = btf->data + btf->hdr.hdr_len; err = btf_parse_str_sec(env); if (err) goto errout; err = btf_check_all_metas(env); if (err) goto errout; err = btf_check_type_tags(env, btf, btf_nr_types(base_btf)); if (err) goto errout; if (base_btf != vmlinux_btf) { err = btf_relocate(btf, vmlinux_btf, &btf->base_id_map); if (err) goto errout; btf_free(base_btf); base_btf = vmlinux_btf; } btf_verifier_env_free(env); refcount_set(&btf->refcnt, 1); return btf; errout: btf_verifier_env_free(env); if (!IS_ERR(base_btf) && base_btf != vmlinux_btf) btf_free(base_btf); if (btf) { kvfree(btf->data); kvfree(btf->types); kfree(btf); } return ERR_PTR(err); } #endif /* CONFIG_DEBUG_INFO_BTF_MODULES */ struct btf *bpf_prog_get_target_btf(const struct bpf_prog *prog) { struct bpf_prog *tgt_prog = prog->aux->dst_prog; if (tgt_prog) return tgt_prog->aux->btf; else return prog->aux->attach_btf; } static bool is_void_or_int_ptr(struct btf *btf, const struct btf_type *t) { /* skip modifiers */ t = btf_type_skip_modifiers(btf, t->type, NULL); return btf_type_is_void(t) || btf_type_is_int(t); } u32 btf_ctx_arg_idx(struct btf *btf, const struct btf_type *func_proto, int off) { const struct btf_param *args; const struct btf_type *t; u32 offset = 0, nr_args; int i; if (!func_proto) return off / 8; nr_args = btf_type_vlen(func_proto); args = (const struct btf_param *)(func_proto + 1); for (i = 0; i < nr_args; i++) { t = btf_type_skip_modifiers(btf, args[i].type, NULL); offset += btf_type_is_ptr(t) ? 8 : roundup(t->size, 8); if (off < offset) return i; } t = btf_type_skip_modifiers(btf, func_proto->type, NULL); offset += btf_type_is_ptr(t) ? 8 : roundup(t->size, 8); if (off < offset) return nr_args; return nr_args + 1; } static bool prog_args_trusted(const struct bpf_prog *prog) { enum bpf_attach_type atype = prog->expected_attach_type; switch (prog->type) { case BPF_PROG_TYPE_TRACING: return atype == BPF_TRACE_RAW_TP || atype == BPF_TRACE_ITER; case BPF_PROG_TYPE_LSM: return bpf_lsm_is_trusted(prog); case BPF_PROG_TYPE_STRUCT_OPS: return true; default: return false; } } int btf_ctx_arg_offset(const struct btf *btf, const struct btf_type *func_proto, u32 arg_no) { const struct btf_param *args; const struct btf_type *t; int off = 0, i; u32 sz; args = btf_params(func_proto); for (i = 0; i < arg_no; i++) { t = btf_type_by_id(btf, args[i].type); t = btf_resolve_size(btf, t, &sz); if (IS_ERR(t)) return PTR_ERR(t); off += roundup(sz, 8); } return off; } struct bpf_raw_tp_null_args { const char *func; u64 mask; }; static const struct bpf_raw_tp_null_args raw_tp_null_args[] = { /* sched */ { "sched_pi_setprio", 0x10 }, /* ... from sched_numa_pair_template event class */ { "sched_stick_numa", 0x100 }, { "sched_swap_numa", 0x100 }, /* afs */ { "afs_make_fs_call", 0x10 }, { "afs_make_fs_calli", 0x10 }, { "afs_make_fs_call1", 0x10 }, { "afs_make_fs_call2", 0x10 }, { "afs_protocol_error", 0x1 }, { "afs_flock_ev", 0x10 }, /* cachefiles */ { "cachefiles_lookup", 0x1 | 0x200 }, { "cachefiles_unlink", 0x1 }, { "cachefiles_rename", 0x1 }, { "cachefiles_prep_read", 0x1 }, { "cachefiles_mark_active", 0x1 }, { "cachefiles_mark_failed", 0x1 }, { "cachefiles_mark_inactive", 0x1 }, { "cachefiles_vfs_error", 0x1 }, { "cachefiles_io_error", 0x1 }, { "cachefiles_ondemand_open", 0x1 }, { "cachefiles_ondemand_copen", 0x1 }, { "cachefiles_ondemand_close", 0x1 }, { "cachefiles_ondemand_read", 0x1 }, { "cachefiles_ondemand_cread", 0x1 }, { "cachefiles_ondemand_fd_write", 0x1 }, { "cachefiles_ondemand_fd_release", 0x1 }, /* ext4, from ext4__mballoc event class */ { "ext4_mballoc_discard", 0x10 }, { "ext4_mballoc_free", 0x10 }, /* fib */ { "fib_table_lookup", 0x100 }, /* filelock */ /* ... from filelock_lock event class */ { "posix_lock_inode", 0x10 }, { "fcntl_setlk", 0x10 }, { "locks_remove_posix", 0x10 }, { "flock_lock_inode", 0x10 }, /* ... from filelock_lease event class */ { "break_lease_noblock", 0x10 }, { "break_lease_block", 0x10 }, { "break_lease_unblock", 0x10 }, { "generic_delete_lease", 0x10 }, { "time_out_leases", 0x10 }, /* host1x */ { "host1x_cdma_push_gather", 0x10000 }, /* huge_memory */ { "mm_khugepaged_scan_pmd", 0x10 }, { "mm_collapse_huge_page_isolate", 0x1 }, { "mm_khugepaged_scan_file", 0x10 }, { "mm_khugepaged_collapse_file", 0x10 }, /* kmem */ { "mm_page_alloc", 0x1 }, { "mm_page_pcpu_drain", 0x1 }, /* .. from mm_page event class */ { "mm_page_alloc_zone_locked", 0x1 }, /* netfs */ { "netfs_failure", 0x10 }, /* power */ { "device_pm_callback_start", 0x10 }, /* qdisc */ { "qdisc_dequeue", 0x1000 }, /* rxrpc */ { "rxrpc_recvdata", 0x1 }, { "rxrpc_resend", 0x10 }, { "rxrpc_tq", 0x10 }, { "rxrpc_client", 0x1 }, /* skb */ {"kfree_skb", 0x1000}, /* sunrpc */ { "xs_stream_read_data", 0x1 }, /* ... from xprt_cong_event event class */ { "xprt_reserve_cong", 0x10 }, { "xprt_release_cong", 0x10 }, { "xprt_get_cong", 0x10 }, { "xprt_put_cong", 0x10 }, /* tcp */ { "tcp_send_reset", 0x11 }, { "tcp_sendmsg_locked", 0x100 }, /* tegra_apb_dma */ { "tegra_dma_tx_status", 0x100 }, /* timer_migration */ { "tmigr_update_events", 0x1 }, /* writeback, from writeback_folio_template event class */ { "writeback_dirty_folio", 0x10 }, { "folio_wait_writeback", 0x10 }, /* rdma */ { "mr_integ_alloc", 0x2000 }, /* bpf_testmod */ { "bpf_testmod_test_read", 0x0 }, /* amdgpu */ { "amdgpu_vm_bo_map", 0x1 }, { "amdgpu_vm_bo_unmap", 0x1 }, /* netfs */ { "netfs_folioq", 0x1 }, /* xfs from xfs_defer_pending_class */ { "xfs_defer_create_intent", 0x1 }, { "xfs_defer_cancel_list", 0x1 }, { "xfs_defer_pending_finish", 0x1 }, { "xfs_defer_pending_abort", 0x1 }, { "xfs_defer_relog_intent", 0x1 }, { "xfs_defer_isolate_paused", 0x1 }, { "xfs_defer_item_pause", 0x1 }, { "xfs_defer_item_unpause", 0x1 }, /* xfs from xfs_defer_pending_item_class */ { "xfs_defer_add_item", 0x1 }, { "xfs_defer_cancel_item", 0x1 }, { "xfs_defer_finish_item", 0x1 }, /* xfs from xfs_icwalk_class */ { "xfs_ioc_free_eofblocks", 0x10 }, { "xfs_blockgc_free_space", 0x10 }, /* xfs from xfs_btree_cur_class */ { "xfs_btree_updkeys", 0x100 }, { "xfs_btree_overlapped_query_range", 0x100 }, /* xfs from xfs_imap_class*/ { "xfs_map_blocks_found", 0x10000 }, { "xfs_map_blocks_alloc", 0x10000 }, { "xfs_iomap_alloc", 0x1000 }, { "xfs_iomap_found", 0x1000 }, /* xfs from xfs_fs_class */ { "xfs_inodegc_flush", 0x1 }, { "xfs_inodegc_push", 0x1 }, { "xfs_inodegc_start", 0x1 }, { "xfs_inodegc_stop", 0x1 }, { "xfs_inodegc_queue", 0x1 }, { "xfs_inodegc_throttle", 0x1 }, { "xfs_fs_sync_fs", 0x1 }, { "xfs_blockgc_start", 0x1 }, { "xfs_blockgc_stop", 0x1 }, { "xfs_blockgc_worker", 0x1 }, { "xfs_blockgc_flush_all", 0x1 }, /* xfs_scrub */ { "xchk_nlinks_live_update", 0x10 }, /* xfs_scrub from xchk_metapath_class */ { "xchk_metapath_lookup", 0x100 }, /* nfsd */ { "nfsd_dirent", 0x1 }, { "nfsd_file_acquire", 0x1001 }, { "nfsd_file_insert_err", 0x1 }, { "nfsd_file_cons_err", 0x1 }, /* nfs4 */ { "nfs4_setup_sequence", 0x1 }, { "pnfs_update_layout", 0x10000 }, { "nfs4_inode_callback_event", 0x200 }, { "nfs4_inode_stateid_callback_event", 0x200 }, /* nfs from pnfs_layout_event */ { "pnfs_mds_fallback_pg_init_read", 0x10000 }, { "pnfs_mds_fallback_pg_init_write", 0x10000 }, { "pnfs_mds_fallback_pg_get_mirror_count", 0x10000 }, { "pnfs_mds_fallback_read_done", 0x10000 }, { "pnfs_mds_fallback_write_done", 0x10000 }, { "pnfs_mds_fallback_read_pagelist", 0x10000 }, { "pnfs_mds_fallback_write_pagelist", 0x10000 }, /* coda */ { "coda_dec_pic_run", 0x10 }, { "coda_dec_pic_done", 0x10 }, /* cfg80211 */ { "cfg80211_scan_done", 0x11 }, { "rdev_set_coalesce", 0x10 }, { "cfg80211_report_wowlan_wakeup", 0x100 }, { "cfg80211_inform_bss_frame", 0x100 }, { "cfg80211_michael_mic_failure", 0x10000 }, /* cfg80211 from wiphy_work_event */ { "wiphy_work_queue", 0x10 }, { "wiphy_work_run", 0x10 }, { "wiphy_work_cancel", 0x10 }, { "wiphy_work_flush", 0x10 }, /* hugetlbfs */ { "hugetlbfs_alloc_inode", 0x10 }, /* spufs */ { "spufs_context", 0x10 }, /* kvm_hv */ { "kvm_page_fault_enter", 0x100 }, /* dpu */ { "dpu_crtc_setup_mixer", 0x100 }, /* binder */ { "binder_transaction", 0x100 }, /* bcachefs */ { "btree_path_free", 0x100 }, /* hfi1_tx */ { "hfi1_sdma_progress", 0x1000 }, /* iptfs */ { "iptfs_ingress_postq_event", 0x1000 }, /* neigh */ { "neigh_update", 0x10 }, /* snd_firewire_lib */ { "amdtp_packet", 0x100 }, }; bool btf_ctx_access(int off, int size, enum bpf_access_type type, const struct bpf_prog *prog, struct bpf_insn_access_aux *info) { const struct btf_type *t = prog->aux->attach_func_proto; struct bpf_prog *tgt_prog = prog->aux->dst_prog; struct btf *btf = bpf_prog_get_target_btf(prog); const char *tname = prog->aux->attach_func_name; struct bpf_verifier_log *log = info->log; const struct btf_param *args; bool ptr_err_raw_tp = false; const char *tag_value; u32 nr_args, arg; int i, ret; if (off % 8) { bpf_log(log, "func '%s' offset %d is not multiple of 8\n", tname, off); return false; } arg = btf_ctx_arg_idx(btf, t, off); args = (const struct btf_param *)(t + 1); /* if (t == NULL) Fall back to default BPF prog with * MAX_BPF_FUNC_REG_ARGS u64 arguments. */ nr_args = t ? btf_type_vlen(t) : MAX_BPF_FUNC_REG_ARGS; if (prog->aux->attach_btf_trace) { /* skip first 'void *__data' argument in btf_trace_##name typedef */ args++; nr_args--; } if (arg > nr_args) { bpf_log(log, "func '%s' doesn't have %d-th argument\n", tname, arg + 1); return false; } if (arg == nr_args) { switch (prog->expected_attach_type) { case BPF_LSM_MAC: /* mark we are accessing the return value */ info->is_retval = true; fallthrough; case BPF_LSM_CGROUP: case BPF_TRACE_FEXIT: /* When LSM programs are attached to void LSM hooks * they use FEXIT trampolines and when attached to * int LSM hooks, they use MODIFY_RETURN trampolines. * * While the LSM programs are BPF_MODIFY_RETURN-like * the check: * * if (ret_type != 'int') * return -EINVAL; * * is _not_ done here. This is still safe as LSM hooks * have only void and int return types. */ if (!t) return true; t = btf_type_by_id(btf, t->type); break; case BPF_MODIFY_RETURN: /* For now the BPF_MODIFY_RETURN can only be attached to * functions that return an int. */ if (!t) return false; t = btf_type_skip_modifiers(btf, t->type, NULL); if (!btf_type_is_small_int(t)) { bpf_log(log, "ret type %s not allowed for fmod_ret\n", btf_type_str(t)); return false; } break; default: bpf_log(log, "func '%s' doesn't have %d-th argument\n", tname, arg + 1); return false; } } else { if (!t) /* Default prog with MAX_BPF_FUNC_REG_ARGS args */ return true; t = btf_type_by_id(btf, args[arg].type); } /* skip modifiers */ while (btf_type_is_modifier(t)) t = btf_type_by_id(btf, t->type); if (btf_type_is_small_int(t) || btf_is_any_enum(t) || btf_type_is_struct(t)) /* accessing a scalar */ return true; if (!btf_type_is_ptr(t)) { bpf_log(log, "func '%s' arg%d '%s' has type %s. Only pointer access is allowed\n", tname, arg, __btf_name_by_offset(btf, t->name_off), btf_type_str(t)); return false; } if (size != sizeof(u64)) { bpf_log(log, "func '%s' size %d must be 8\n", tname, size); return false; } /* check for PTR_TO_RDONLY_BUF_OR_NULL or PTR_TO_RDWR_BUF_OR_NULL */ for (i = 0; i < prog->aux->ctx_arg_info_size; i++) { const struct bpf_ctx_arg_aux *ctx_arg_info = &prog->aux->ctx_arg_info[i]; u32 type, flag; type = base_type(ctx_arg_info->reg_type); flag = type_flag(ctx_arg_info->reg_type); if (ctx_arg_info->offset == off && type == PTR_TO_BUF && (flag & PTR_MAYBE_NULL)) { info->reg_type = ctx_arg_info->reg_type; return true; } } /* * If it's a pointer to void, it's the same as scalar from the verifier * safety POV. Either way, no futher pointer walking is allowed. */ if (is_void_or_int_ptr(btf, t)) return true; /* this is a pointer to another type */ for (i = 0; i < prog->aux->ctx_arg_info_size; i++) { const struct bpf_ctx_arg_aux *ctx_arg_info = &prog->aux->ctx_arg_info[i]; if (ctx_arg_info->offset == off) { if (!ctx_arg_info->btf_id) { bpf_log(log,"invalid btf_id for context argument offset %u\n", off); return false; } info->reg_type = ctx_arg_info->reg_type; info->btf = ctx_arg_info->btf ? : btf_vmlinux; info->btf_id = ctx_arg_info->btf_id; info->ref_obj_id = ctx_arg_info->ref_obj_id; return true; } } info->reg_type = PTR_TO_BTF_ID; if (prog_args_trusted(prog)) info->reg_type |= PTR_TRUSTED; if (btf_param_match_suffix(btf, &args[arg], "__nullable")) info->reg_type |= PTR_MAYBE_NULL; if (prog->expected_attach_type == BPF_TRACE_RAW_TP) { struct btf *btf = prog->aux->attach_btf; const struct btf_type *t; const char *tname; /* BTF lookups cannot fail, return false on error */ t = btf_type_by_id(btf, prog->aux->attach_btf_id); if (!t) return false; tname = btf_name_by_offset(btf, t->name_off); if (!tname) return false; /* Checked by bpf_check_attach_target */ tname += sizeof("btf_trace_") - 1; for (i = 0; i < ARRAY_SIZE(raw_tp_null_args); i++) { /* Is this a func with potential NULL args? */ if (strcmp(tname, raw_tp_null_args[i].func)) continue; if (raw_tp_null_args[i].mask & (0x1ULL << (arg * 4))) info->reg_type |= PTR_MAYBE_NULL; /* Is the current arg IS_ERR? */ if (raw_tp_null_args[i].mask & (0x2ULL << (arg * 4))) ptr_err_raw_tp = true; break; } /* If we don't know NULL-ness specification and the tracepoint * is coming from a loadable module, be conservative and mark * argument as PTR_MAYBE_NULL. */ if (i == ARRAY_SIZE(raw_tp_null_args) && btf_is_module(btf)) info->reg_type |= PTR_MAYBE_NULL; } if (tgt_prog) { enum bpf_prog_type tgt_type; if (tgt_prog->type == BPF_PROG_TYPE_EXT) tgt_type = tgt_prog->aux->saved_dst_prog_type; else tgt_type = tgt_prog->type; ret = btf_translate_to_vmlinux(log, btf, t, tgt_type, arg); if (ret > 0) { info->btf = btf_vmlinux; info->btf_id = ret; return true; } else { return false; } } info->btf = btf; info->btf_id = t->type; t = btf_type_by_id(btf, t->type); if (btf_type_is_type_tag(t) && !btf_type_kflag(t)) { tag_value = __btf_name_by_offset(btf, t->name_off); if (strcmp(tag_value, "user") == 0) info->reg_type |= MEM_USER; if (strcmp(tag_value, "percpu") == 0) info->reg_type |= MEM_PERCPU; } /* skip modifiers */ while (btf_type_is_modifier(t)) { info->btf_id = t->type; t = btf_type_by_id(btf, t->type); } if (!btf_type_is_struct(t)) { bpf_log(log, "func '%s' arg%d type %s is not a struct\n", tname, arg, btf_type_str(t)); return false; } bpf_log(log, "func '%s' arg%d has btf_id %d type %s '%s'\n", tname, arg, info->btf_id, btf_type_str(t), __btf_name_by_offset(btf, t->name_off)); /* Perform all checks on the validity of type for this argument, but if * we know it can be IS_ERR at runtime, scrub pointer type and mark as * scalar. */ if (ptr_err_raw_tp) { bpf_log(log, "marking pointer arg%d as scalar as it may encode error", arg); info->reg_type = SCALAR_VALUE; } return true; } EXPORT_SYMBOL_GPL(btf_ctx_access); enum bpf_struct_walk_result { /* < 0 error */ WALK_SCALAR = 0, WALK_PTR, WALK_PTR_UNTRUSTED, WALK_STRUCT, }; static int btf_struct_walk(struct bpf_verifier_log *log, const struct btf *btf, const struct btf_type *t, int off, int size, u32 *next_btf_id, enum bpf_type_flag *flag, const char **field_name) { u32 i, moff, mtrue_end, msize = 0, total_nelems = 0; const struct btf_type *mtype, *elem_type = NULL; const struct btf_member *member; const char *tname, *mname, *tag_value; u32 vlen, elem_id, mid; again: if (btf_type_is_modifier(t)) t = btf_type_skip_modifiers(btf, t->type, NULL); tname = __btf_name_by_offset(btf, t->name_off); if (!btf_type_is_struct(t)) { bpf_log(log, "Type '%s' is not a struct\n", tname); return -EINVAL; } vlen = btf_type_vlen(t); if (BTF_INFO_KIND(t->info) == BTF_KIND_UNION && vlen != 1 && !(*flag & PTR_UNTRUSTED)) /* * walking unions yields untrusted pointers * with exception of __bpf_md_ptr and other * unions with a single member */ *flag |= PTR_UNTRUSTED; if (off + size > t->size) { /* If the last element is a variable size array, we may * need to relax the rule. */ struct btf_array *array_elem; if (vlen == 0) goto error; member = btf_type_member(t) + vlen - 1; mtype = btf_type_skip_modifiers(btf, member->type, NULL); if (!btf_type_is_array(mtype)) goto error; array_elem = (struct btf_array *)(mtype + 1); if (array_elem->nelems != 0) goto error; moff = __btf_member_bit_offset(t, member) / 8; if (off < moff) goto error; /* allow structure and integer */ t = btf_type_skip_modifiers(btf, array_elem->type, NULL); if (btf_type_is_int(t)) return WALK_SCALAR; if (!btf_type_is_struct(t)) goto error; off = (off - moff) % t->size; goto again; error: bpf_log(log, "access beyond struct %s at off %u size %u\n", tname, off, size); return -EACCES; } for_each_member(i, t, member) { /* offset of the field in bytes */ moff = __btf_member_bit_offset(t, member) / 8; if (off + size <= moff) /* won't find anything, field is already too far */ break; if (__btf_member_bitfield_size(t, member)) { u32 end_bit = __btf_member_bit_offset(t, member) + __btf_member_bitfield_size(t, member); /* off <= moff instead of off == moff because clang * does not generate a BTF member for anonymous * bitfield like the ":16" here: * struct { * int :16; * int x:8; * }; */ if (off <= moff && BITS_ROUNDUP_BYTES(end_bit) <= off + size) return WALK_SCALAR; /* off may be accessing a following member * * or * * Doing partial access at either end of this * bitfield. Continue on this case also to * treat it as not accessing this bitfield * and eventually error out as field not * found to keep it simple. * It could be relaxed if there was a legit * partial access case later. */ continue; } /* In case of "off" is pointing to holes of a struct */ if (off < moff) break; /* type of the field */ mid = member->type; mtype = btf_type_by_id(btf, member->type); mname = __btf_name_by_offset(btf, member->name_off); mtype = __btf_resolve_size(btf, mtype, &msize, &elem_type, &elem_id, &total_nelems, &mid); if (IS_ERR(mtype)) { bpf_log(log, "field %s doesn't have size\n", mname); return -EFAULT; } mtrue_end = moff + msize; if (off >= mtrue_end) /* no overlap with member, keep iterating */ continue; if (btf_type_is_array(mtype)) { u32 elem_idx; /* __btf_resolve_size() above helps to * linearize a multi-dimensional array. * * The logic here is treating an array * in a struct as the following way: * * struct outer { * struct inner array[2][2]; * }; * * looks like: * * struct outer { * struct inner array_elem0; * struct inner array_elem1; * struct inner array_elem2; * struct inner array_elem3; * }; * * When accessing outer->array[1][0], it moves * moff to "array_elem2", set mtype to * "struct inner", and msize also becomes * sizeof(struct inner). Then most of the * remaining logic will fall through without * caring the current member is an array or * not. * * Unlike mtype/msize/moff, mtrue_end does not * change. The naming difference ("_true") tells * that it is not always corresponding to * the current mtype/msize/moff. * It is the true end of the current * member (i.e. array in this case). That * will allow an int array to be accessed like * a scratch space, * i.e. allow access beyond the size of * the array's element as long as it is * within the mtrue_end boundary. */ /* skip empty array */ if (moff == mtrue_end) continue; msize /= total_nelems; elem_idx = (off - moff) / msize; moff += elem_idx * msize; mtype = elem_type; mid = elem_id; } /* the 'off' we're looking for is either equal to start * of this field or inside of this struct */ if (btf_type_is_struct(mtype)) { /* our field must be inside that union or struct */ t = mtype; /* return if the offset matches the member offset */ if (off == moff) { *next_btf_id = mid; return WALK_STRUCT; } /* adjust offset we're looking for */ off -= moff; goto again; } if (btf_type_is_ptr(mtype)) { const struct btf_type *stype, *t; enum bpf_type_flag tmp_flag = 0; u32 id; if (msize != size || off != moff) { bpf_log(log, "cannot access ptr member %s with moff %u in struct %s with off %u size %u\n", mname, moff, tname, off, size); return -EACCES; } /* check type tag */ t = btf_type_by_id(btf, mtype->type); if (btf_type_is_type_tag(t) && !btf_type_kflag(t)) { tag_value = __btf_name_by_offset(btf, t->name_off); /* check __user tag */ if (strcmp(tag_value, "user") == 0) tmp_flag = MEM_USER; /* check __percpu tag */ if (strcmp(tag_value, "percpu") == 0) tmp_flag = MEM_PERCPU; /* check __rcu tag */ if (strcmp(tag_value, "rcu") == 0) tmp_flag = MEM_RCU; } stype = btf_type_skip_modifiers(btf, mtype->type, &id); if (btf_type_is_struct(stype)) { *next_btf_id = id; *flag |= tmp_flag; if (field_name) *field_name = mname; return WALK_PTR; } return WALK_PTR_UNTRUSTED; } /* Allow more flexible access within an int as long as * it is within mtrue_end. * Since mtrue_end could be the end of an array, * that also allows using an array of int as a scratch * space. e.g. skb->cb[]. */ if (off + size > mtrue_end && !(*flag & PTR_UNTRUSTED)) { bpf_log(log, "access beyond the end of member %s (mend:%u) in struct %s with off %u size %u\n", mname, mtrue_end, tname, off, size); return -EACCES; } return WALK_SCALAR; } bpf_log(log, "struct %s doesn't have field at offset %d\n", tname, off); return -EINVAL; } int btf_struct_access(struct bpf_verifier_log *log, const struct bpf_reg_state *reg, int off, int size, enum bpf_access_type atype __maybe_unused, u32 *next_btf_id, enum bpf_type_flag *flag, const char **field_name) { const struct btf *btf = reg->btf; enum bpf_type_flag tmp_flag = 0; const struct btf_type *t; u32 id = reg->btf_id; int err; while (type_is_alloc(reg->type)) { struct btf_struct_meta *meta; struct btf_record *rec; int i; meta = btf_find_struct_meta(btf, id); if (!meta) break; rec = meta->record; for (i = 0; i < rec->cnt; i++) { struct btf_field *field = &rec->fields[i]; u32 offset = field->offset; if (off < offset + field->size && offset < off + size) { bpf_log(log, "direct access to %s is disallowed\n", btf_field_type_name(field->type)); return -EACCES; } } break; } t = btf_type_by_id(btf, id); do { err = btf_struct_walk(log, btf, t, off, size, &id, &tmp_flag, field_name); switch (err) { case WALK_PTR: /* For local types, the destination register cannot * become a pointer again. */ if (type_is_alloc(reg->type)) return SCALAR_VALUE; /* If we found the pointer or scalar on t+off, * we're done. */ *next_btf_id = id; *flag = tmp_flag; return PTR_TO_BTF_ID; case WALK_PTR_UNTRUSTED: *flag = MEM_RDONLY | PTR_UNTRUSTED; return PTR_TO_MEM; case WALK_SCALAR: return SCALAR_VALUE; case WALK_STRUCT: /* We found nested struct, so continue the search * by diving in it. At this point the offset is * aligned with the new type, so set it to 0. */ t = btf_type_by_id(btf, id); off = 0; break; default: /* It's either error or unknown return value.. * scream and leave. */ if (WARN_ONCE(err > 0, "unknown btf_struct_walk return value")) return -EINVAL; return err; } } while (t); return -EINVAL; } /* Check that two BTF types, each specified as an BTF object + id, are exactly * the same. Trivial ID check is not enough due to module BTFs, because we can * end up with two different module BTFs, but IDs point to the common type in * vmlinux BTF. */ bool btf_types_are_same(const struct btf *btf1, u32 id1, const struct btf *btf2, u32 id2) { if (id1 != id2) return false; if (btf1 == btf2) return true; return btf_type_by_id(btf1, id1) == btf_type_by_id(btf2, id2); } bool btf_struct_ids_match(struct bpf_verifier_log *log, const struct btf *btf, u32 id, int off, const struct btf *need_btf, u32 need_type_id, bool strict) { const struct btf_type *type; enum bpf_type_flag flag = 0; int err; /* Are we already done? */ if (off == 0 && btf_types_are_same(btf, id, need_btf, need_type_id)) return true; /* In case of strict type match, we do not walk struct, the top level * type match must succeed. When strict is true, off should have already * been 0. */ if (strict) return false; again: type = btf_type_by_id(btf, id); if (!type) return false; err = btf_struct_walk(log, btf, type, off, 1, &id, &flag, NULL); if (err != WALK_STRUCT) return false; /* We found nested struct object. If it matches * the requested ID, we're done. Otherwise let's * continue the search with offset 0 in the new * type. */ if (!btf_types_are_same(btf, id, need_btf, need_type_id)) { off = 0; goto again; } return true; } static int __get_type_size(struct btf *btf, u32 btf_id, const struct btf_type **ret_type) { const struct btf_type *t; *ret_type = btf_type_by_id(btf, 0); if (!btf_id) /* void */ return 0; t = btf_type_by_id(btf, btf_id); while (t && btf_type_is_modifier(t)) t = btf_type_by_id(btf, t->type); if (!t) return -EINVAL; *ret_type = t; if (btf_type_is_ptr(t)) /* kernel size of pointer. Not BPF's size of pointer*/ return sizeof(void *); if (btf_type_is_int(t) || btf_is_any_enum(t) || btf_type_is_struct(t)) return t->size; return -EINVAL; } static u8 __get_type_fmodel_flags(const struct btf_type *t) { u8 flags = 0; if (btf_type_is_struct(t)) flags |= BTF_FMODEL_STRUCT_ARG; if (btf_type_is_signed_int(t)) flags |= BTF_FMODEL_SIGNED_ARG; return flags; } int btf_distill_func_proto(struct bpf_verifier_log *log, struct btf *btf, const struct btf_type *func, const char *tname, struct btf_func_model *m) { const struct btf_param *args; const struct btf_type *t; u32 i, nargs; int ret; if (!func) { /* BTF function prototype doesn't match the verifier types. * Fall back to MAX_BPF_FUNC_REG_ARGS u64 args. */ for (i = 0; i < MAX_BPF_FUNC_REG_ARGS; i++) { m->arg_size[i] = 8; m->arg_flags[i] = 0; } m->ret_size = 8; m->ret_flags = 0; m->nr_args = MAX_BPF_FUNC_REG_ARGS; return 0; } args = (const struct btf_param *)(func + 1); nargs = btf_type_vlen(func); if (nargs > MAX_BPF_FUNC_ARGS) { bpf_log(log, "The function %s has %d arguments. Too many.\n", tname, nargs); return -EINVAL; } ret = __get_type_size(btf, func->type, &t); if (ret < 0 || btf_type_is_struct(t)) { bpf_log(log, "The function %s return type %s is unsupported.\n", tname, btf_type_str(t)); return -EINVAL; } m->ret_size = ret; m->ret_flags = __get_type_fmodel_flags(t); for (i = 0; i < nargs; i++) { if (i == nargs - 1 && args[i].type == 0) { bpf_log(log, "The function %s with variable args is unsupported.\n", tname); return -EINVAL; } ret = __get_type_size(btf, args[i].type, &t); /* No support of struct argument size greater than 16 bytes */ if (ret < 0 || ret > 16) { bpf_log(log, "The function %s arg%d type %s is unsupported.\n", tname, i, btf_type_str(t)); return -EINVAL; } if (ret == 0) { bpf_log(log, "The function %s has malformed void argument.\n", tname); return -EINVAL; } m->arg_size[i] = ret; m->arg_flags[i] = __get_type_fmodel_flags(t); } m->nr_args = nargs; return 0; } /* Compare BTFs of two functions assuming only scalars and pointers to context. * t1 points to BTF_KIND_FUNC in btf1 * t2 points to BTF_KIND_FUNC in btf2 * Returns: * EINVAL - function prototype mismatch * EFAULT - verifier bug * 0 - 99% match. The last 1% is validated by the verifier. */ static int btf_check_func_type_match(struct bpf_verifier_log *log, struct btf *btf1, const struct btf_type *t1, struct btf *btf2, const struct btf_type *t2) { const struct btf_param *args1, *args2; const char *fn1, *fn2, *s1, *s2; u32 nargs1, nargs2, i; fn1 = btf_name_by_offset(btf1, t1->name_off); fn2 = btf_name_by_offset(btf2, t2->name_off); if (btf_func_linkage(t1) != BTF_FUNC_GLOBAL) { bpf_log(log, "%s() is not a global function\n", fn1); return -EINVAL; } if (btf_func_linkage(t2) != BTF_FUNC_GLOBAL) { bpf_log(log, "%s() is not a global function\n", fn2); return -EINVAL; } t1 = btf_type_by_id(btf1, t1->type); if (!t1 || !btf_type_is_func_proto(t1)) return -EFAULT; t2 = btf_type_by_id(btf2, t2->type); if (!t2 || !btf_type_is_func_proto(t2)) return -EFAULT; args1 = (const struct btf_param *)(t1 + 1); nargs1 = btf_type_vlen(t1); args2 = (const struct btf_param *)(t2 + 1); nargs2 = btf_type_vlen(t2); if (nargs1 != nargs2) { bpf_log(log, "%s() has %d args while %s() has %d args\n", fn1, nargs1, fn2, nargs2); return -EINVAL; } t1 = btf_type_skip_modifiers(btf1, t1->type, NULL); t2 = btf_type_skip_modifiers(btf2, t2->type, NULL); if (t1->info != t2->info) { bpf_log(log, "Return type %s of %s() doesn't match type %s of %s()\n", btf_type_str(t1), fn1, btf_type_str(t2), fn2); return -EINVAL; } for (i = 0; i < nargs1; i++) { t1 = btf_type_skip_modifiers(btf1, args1[i].type, NULL); t2 = btf_type_skip_modifiers(btf2, args2[i].type, NULL); if (t1->info != t2->info) { bpf_log(log, "arg%d in %s() is %s while %s() has %s\n", i, fn1, btf_type_str(t1), fn2, btf_type_str(t2)); return -EINVAL; } if (btf_type_has_size(t1) && t1->size != t2->size) { bpf_log(log, "arg%d in %s() has size %d while %s() has %d\n", i, fn1, t1->size, fn2, t2->size); return -EINVAL; } /* global functions are validated with scalars and pointers * to context only. And only global functions can be replaced. * Hence type check only those types. */ if (btf_type_is_int(t1) || btf_is_any_enum(t1)) continue; if (!btf_type_is_ptr(t1)) { bpf_log(log, "arg%d in %s() has unrecognized type\n", i, fn1); return -EINVAL; } t1 = btf_type_skip_modifiers(btf1, t1->type, NULL); t2 = btf_type_skip_modifiers(btf2, t2->type, NULL); if (!btf_type_is_struct(t1)) { bpf_log(log, "arg%d in %s() is not a pointer to context\n", i, fn1); return -EINVAL; } if (!btf_type_is_struct(t2)) { bpf_log(log, "arg%d in %s() is not a pointer to context\n", i, fn2); return -EINVAL; } /* This is an optional check to make program writing easier. * Compare names of structs and report an error to the user. * btf_prepare_func_args() already checked that t2 struct * is a context type. btf_prepare_func_args() will check * later that t1 struct is a context type as well. */ s1 = btf_name_by_offset(btf1, t1->name_off); s2 = btf_name_by_offset(btf2, t2->name_off); if (strcmp(s1, s2)) { bpf_log(log, "arg%d %s(struct %s *) doesn't match %s(struct %s *)\n", i, fn1, s1, fn2, s2); return -EINVAL; } } return 0; } /* Compare BTFs of given program with BTF of target program */ int btf_check_type_match(struct bpf_verifier_log *log, const struct bpf_prog *prog, struct btf *btf2, const struct btf_type *t2) { struct btf *btf1 = prog->aux->btf; const struct btf_type *t1; u32 btf_id = 0; if (!prog->aux->func_info) { bpf_log(log, "Program extension requires BTF\n"); return -EINVAL; } btf_id = prog->aux->func_info[0].type_id; if (!btf_id) return -EFAULT; t1 = btf_type_by_id(btf1, btf_id); if (!t1 || !btf_type_is_func(t1)) return -EFAULT; return btf_check_func_type_match(log, btf1, t1, btf2, t2); } static bool btf_is_dynptr_ptr(const struct btf *btf, const struct btf_type *t) { const char *name; t = btf_type_by_id(btf, t->type); /* skip PTR */ while (btf_type_is_modifier(t)) t = btf_type_by_id(btf, t->type); /* allow either struct or struct forward declaration */ if (btf_type_is_struct(t) || (btf_type_is_fwd(t) && btf_type_kflag(t) == 0)) { name = btf_str_by_offset(btf, t->name_off); return name && strcmp(name, "bpf_dynptr") == 0; } return false; } struct bpf_cand_cache { const char *name; u32 name_len; u16 kind; u16 cnt; struct { const struct btf *btf; u32 id; } cands[]; }; static DEFINE_MUTEX(cand_cache_mutex); static struct bpf_cand_cache * bpf_core_find_cands(struct bpf_core_ctx *ctx, u32 local_type_id); static int btf_get_ptr_to_btf_id(struct bpf_verifier_log *log, int arg_idx, const struct btf *btf, const struct btf_type *t) { struct bpf_cand_cache *cc; struct bpf_core_ctx ctx = { .btf = btf, .log = log, }; u32 kern_type_id, type_id; int err = 0; /* skip PTR and modifiers */ type_id = t->type; t = btf_type_by_id(btf, t->type); while (btf_type_is_modifier(t)) { type_id = t->type; t = btf_type_by_id(btf, t->type); } mutex_lock(&cand_cache_mutex); cc = bpf_core_find_cands(&ctx, type_id); if (IS_ERR(cc)) { err = PTR_ERR(cc); bpf_log(log, "arg#%d reference type('%s %s') candidate matching error: %d\n", arg_idx, btf_type_str(t), __btf_name_by_offset(btf, t->name_off), err); goto cand_cache_unlock; } if (cc->cnt != 1) { bpf_log(log, "arg#%d reference type('%s %s') %s\n", arg_idx, btf_type_str(t), __btf_name_by_offset(btf, t->name_off), cc->cnt == 0 ? "has no matches" : "is ambiguous"); err = cc->cnt == 0 ? -ENOENT : -ESRCH; goto cand_cache_unlock; } if (btf_is_module(cc->cands[0].btf)) { bpf_log(log, "arg#%d reference type('%s %s') points to kernel module type (unsupported)\n", arg_idx, btf_type_str(t), __btf_name_by_offset(btf, t->name_off)); err = -EOPNOTSUPP; goto cand_cache_unlock; } kern_type_id = cc->cands[0].id; cand_cache_unlock: mutex_unlock(&cand_cache_mutex); if (err) return err; return kern_type_id; } enum btf_arg_tag { ARG_TAG_CTX = BIT_ULL(0), ARG_TAG_NONNULL = BIT_ULL(1), ARG_TAG_TRUSTED = BIT_ULL(2), ARG_TAG_UNTRUSTED = BIT_ULL(3), ARG_TAG_NULLABLE = BIT_ULL(4), ARG_TAG_ARENA = BIT_ULL(5), }; /* Process BTF of a function to produce high-level expectation of function * arguments (like ARG_PTR_TO_CTX, or ARG_PTR_TO_MEM, etc). This information * is cached in subprog info for reuse. * Returns: * EFAULT - there is a verifier bug. Abort verification. * EINVAL - cannot convert BTF. * 0 - Successfully processed BTF and constructed argument expectations. */ int btf_prepare_func_args(struct bpf_verifier_env *env, int subprog) { bool is_global = subprog_aux(env, subprog)->linkage == BTF_FUNC_GLOBAL; struct bpf_subprog_info *sub = subprog_info(env, subprog); struct bpf_verifier_log *log = &env->log; struct bpf_prog *prog = env->prog; enum bpf_prog_type prog_type = prog->type; struct btf *btf = prog->aux->btf; const struct btf_param *args; const struct btf_type *t, *ref_t, *fn_t; u32 i, nargs, btf_id; const char *tname; if (sub->args_cached) return 0; if (!prog->aux->func_info) { verifier_bug(env, "func_info undefined"); return -EFAULT; } btf_id = prog->aux->func_info[subprog].type_id; if (!btf_id) { if (!is_global) /* not fatal for static funcs */ return -EINVAL; bpf_log(log, "Global functions need valid BTF\n"); return -EFAULT; } fn_t = btf_type_by_id(btf, btf_id); if (!fn_t || !btf_type_is_func(fn_t)) { /* These checks were already done by the verifier while loading * struct bpf_func_info */ bpf_log(log, "BTF of func#%d doesn't point to KIND_FUNC\n", subprog); return -EFAULT; } tname = btf_name_by_offset(btf, fn_t->name_off); if (prog->aux->func_info_aux[subprog].unreliable) { verifier_bug(env, "unreliable BTF for function %s()", tname); return -EFAULT; } if (prog_type == BPF_PROG_TYPE_EXT) prog_type = prog->aux->dst_prog->type; t = btf_type_by_id(btf, fn_t->type); if (!t || !btf_type_is_func_proto(t)) { bpf_log(log, "Invalid type of function %s()\n", tname); return -EFAULT; } args = (const struct btf_param *)(t + 1); nargs = btf_type_vlen(t); if (nargs > MAX_BPF_FUNC_REG_ARGS) { if (!is_global) return -EINVAL; bpf_log(log, "Global function %s() with %d > %d args. Buggy compiler.\n", tname, nargs, MAX_BPF_FUNC_REG_ARGS); return -EINVAL; } /* check that function returns int, exception cb also requires this */ t = btf_type_by_id(btf, t->type); while (btf_type_is_modifier(t)) t = btf_type_by_id(btf, t->type); if (!btf_type_is_int(t) && !btf_is_any_enum(t)) { if (!is_global) return -EINVAL; bpf_log(log, "Global function %s() doesn't return scalar. Only those are supported.\n", tname); return -EINVAL; } /* Convert BTF function arguments into verifier types. * Only PTR_TO_CTX and SCALAR are supported atm. */ for (i = 0; i < nargs; i++) { u32 tags = 0; int id = 0; /* 'arg:<tag>' decl_tag takes precedence over derivation of * register type from BTF type itself */ while ((id = btf_find_next_decl_tag(btf, fn_t, i, "arg:", id)) > 0) { const struct btf_type *tag_t = btf_type_by_id(btf, id); const char *tag = __btf_name_by_offset(btf, tag_t->name_off) + 4; /* disallow arg tags in static subprogs */ if (!is_global) { bpf_log(log, "arg#%d type tag is not supported in static functions\n", i); return -EOPNOTSUPP; } if (strcmp(tag, "ctx") == 0) { tags |= ARG_TAG_CTX; } else if (strcmp(tag, "trusted") == 0) { tags |= ARG_TAG_TRUSTED; } else if (strcmp(tag, "untrusted") == 0) { tags |= ARG_TAG_UNTRUSTED; } else if (strcmp(tag, "nonnull") == 0) { tags |= ARG_TAG_NONNULL; } else if (strcmp(tag, "nullable") == 0) { tags |= ARG_TAG_NULLABLE; } else if (strcmp(tag, "arena") == 0) { tags |= ARG_TAG_ARENA; } else { bpf_log(log, "arg#%d has unsupported set of tags\n", i); return -EOPNOTSUPP; } } if (id != -ENOENT) { bpf_log(log, "arg#%d type tag fetching failure: %d\n", i, id); return id; } t = btf_type_by_id(btf, args[i].type); while (btf_type_is_modifier(t)) t = btf_type_by_id(btf, t->type); if (!btf_type_is_ptr(t)) goto skip_pointer; if ((tags & ARG_TAG_CTX) || btf_is_prog_ctx_type(log, btf, t, prog_type, i)) { if (tags & ~ARG_TAG_CTX) { bpf_log(log, "arg#%d has invalid combination of tags\n", i); return -EINVAL; } if ((tags & ARG_TAG_CTX) && btf_validate_prog_ctx_type(log, btf, t, i, prog_type, prog->expected_attach_type)) return -EINVAL; sub->args[i].arg_type = ARG_PTR_TO_CTX; continue; } if (btf_is_dynptr_ptr(btf, t)) { if (tags) { bpf_log(log, "arg#%d has invalid combination of tags\n", i); return -EINVAL; } sub->args[i].arg_type = ARG_PTR_TO_DYNPTR | MEM_RDONLY; continue; } if (tags & ARG_TAG_TRUSTED) { int kern_type_id; if (tags & ARG_TAG_NONNULL) { bpf_log(log, "arg#%d has invalid combination of tags\n", i); return -EINVAL; } kern_type_id = btf_get_ptr_to_btf_id(log, i, btf, t); if (kern_type_id < 0) return kern_type_id; sub->args[i].arg_type = ARG_PTR_TO_BTF_ID | PTR_TRUSTED; if (tags & ARG_TAG_NULLABLE) sub->args[i].arg_type |= PTR_MAYBE_NULL; sub->args[i].btf_id = kern_type_id; continue; } if (tags & ARG_TAG_UNTRUSTED) { struct btf *vmlinux_btf; int kern_type_id; if (tags & ~ARG_TAG_UNTRUSTED) { bpf_log(log, "arg#%d untrusted cannot be combined with any other tags\n", i); return -EINVAL; } ref_t = btf_type_skip_modifiers(btf, t->type, NULL); if (btf_type_is_void(ref_t) || btf_type_is_primitive(ref_t)) { sub->args[i].arg_type = ARG_PTR_TO_MEM | MEM_RDONLY | PTR_UNTRUSTED; sub->args[i].mem_size = 0; continue; } kern_type_id = btf_get_ptr_to_btf_id(log, i, btf, t); if (kern_type_id < 0) return kern_type_id; vmlinux_btf = bpf_get_btf_vmlinux(); ref_t = btf_type_by_id(vmlinux_btf, kern_type_id); if (!btf_type_is_struct(ref_t)) { tname = __btf_name_by_offset(vmlinux_btf, t->name_off); bpf_log(log, "arg#%d has type %s '%s', but only struct or primitive types are allowed\n", i, btf_type_str(ref_t), tname); return -EINVAL; } sub->args[i].arg_type = ARG_PTR_TO_BTF_ID | PTR_UNTRUSTED; sub->args[i].btf_id = kern_type_id; continue; } if (tags & ARG_TAG_ARENA) { if (tags & ~ARG_TAG_ARENA) { bpf_log(log, "arg#%d arena cannot be combined with any other tags\n", i); return -EINVAL; } sub->args[i].arg_type = ARG_PTR_TO_ARENA; continue; } if (is_global) { /* generic user data pointer */ u32 mem_size; if (tags & ARG_TAG_NULLABLE) { bpf_log(log, "arg#%d has invalid combination of tags\n", i); return -EINVAL; } t = btf_type_skip_modifiers(btf, t->type, NULL); ref_t = btf_resolve_size(btf, t, &mem_size); if (IS_ERR(ref_t)) { bpf_log(log, "arg#%d reference type('%s %s') size cannot be determined: %ld\n", i, btf_type_str(t), btf_name_by_offset(btf, t->name_off), PTR_ERR(ref_t)); return -EINVAL; } sub->args[i].arg_type = ARG_PTR_TO_MEM | PTR_MAYBE_NULL; if (tags & ARG_TAG_NONNULL) sub->args[i].arg_type &= ~PTR_MAYBE_NULL; sub->args[i].mem_size = mem_size; continue; } skip_pointer: if (tags) { bpf_log(log, "arg#%d has pointer tag, but is not a pointer type\n", i); return -EINVAL; } if (btf_type_is_int(t) || btf_is_any_enum(t)) { sub->args[i].arg_type = ARG_ANYTHING; continue; } if (!is_global) return -EINVAL; bpf_log(log, "Arg#%d type %s in %s() is not supported yet.\n", i, btf_type_str(t), tname); return -EINVAL; } sub->arg_cnt = nargs; sub->args_cached = true; return 0; } static void btf_type_show(const struct btf *btf, u32 type_id, void *obj, struct btf_show *show) { const struct btf_type *t = btf_type_by_id(btf, type_id); show->btf = btf; memset(&show->state, 0, sizeof(show->state)); memset(&show->obj, 0, sizeof(show->obj)); btf_type_ops(t)->show(btf, t, type_id, obj, 0, show); } __printf(2, 0) static void btf_seq_show(struct btf_show *show, const char *fmt, va_list args) { seq_vprintf((struct seq_file *)show->target, fmt, args); } int btf_type_seq_show_flags(const struct btf *btf, u32 type_id, void *obj, struct seq_file *m, u64 flags) { struct btf_show sseq; sseq.target = m; sseq.showfn = btf_seq_show; sseq.flags = flags; btf_type_show(btf, type_id, obj, &sseq); return sseq.state.status; } void btf_type_seq_show(const struct btf *btf, u32 type_id, void *obj, struct seq_file *m) { (void) btf_type_seq_show_flags(btf, type_id, obj, m, BTF_SHOW_NONAME | BTF_SHOW_COMPACT | BTF_SHOW_ZERO | BTF_SHOW_UNSAFE); } struct btf_show_snprintf { struct btf_show show; int len_left; /* space left in string */ int len; /* length we would have written */ }; __printf(2, 0) static void btf_snprintf_show(struct btf_show *show, const char *fmt, va_list args) { struct btf_show_snprintf *ssnprintf = (struct btf_show_snprintf *)show; int len; len = vsnprintf(show->target, ssnprintf->len_left, fmt, args); if (len < 0) { ssnprintf->len_left = 0; ssnprintf->len = len; } else if (len >= ssnprintf->len_left) { /* no space, drive on to get length we would have written */ ssnprintf->len_left = 0; ssnprintf->len += len; } else { ssnprintf->len_left -= len; ssnprintf->len += len; show->target += len; } } int btf_type_snprintf_show(const struct btf *btf, u32 type_id, void *obj, char *buf, int len, u64 flags) { struct btf_show_snprintf ssnprintf; ssnprintf.show.target = buf; ssnprintf.show.flags = flags; ssnprintf.show.showfn = btf_snprintf_show; ssnprintf.len_left = len; ssnprintf.len = 0; btf_type_show(btf, type_id, obj, (struct btf_show *)&ssnprintf); /* If we encountered an error, return it. */ if (ssnprintf.show.state.status) return ssnprintf.show.state.status; /* Otherwise return length we would have written */ return ssnprintf.len; } #ifdef CONFIG_PROC_FS static void bpf_btf_show_fdinfo(struct seq_file *m, struct file *filp) { const struct btf *btf = filp->private_data; seq_printf(m, "btf_id:\t%u\n", btf->id); } #endif static int btf_release(struct inode *inode, struct file *filp) { btf_put(filp->private_data); return 0; } const struct file_operations btf_fops = { #ifdef CONFIG_PROC_FS .show_fdinfo = bpf_btf_show_fdinfo, #endif .release = btf_release, }; static int __btf_new_fd(struct btf *btf) { return anon_inode_getfd("btf", &btf_fops, btf, O_RDONLY | O_CLOEXEC); } int btf_new_fd(const union bpf_attr *attr, bpfptr_t uattr, u32 uattr_size) { struct btf *btf; int ret; btf = btf_parse(attr, uattr, uattr_size); if (IS_ERR(btf)) return PTR_ERR(btf); ret = btf_alloc_id(btf); if (ret) { btf_free(btf); return ret; } /* * The BTF ID is published to the userspace. * All BTF free must go through call_rcu() from * now on (i.e. free by calling btf_put()). */ ret = __btf_new_fd(btf); if (ret < 0) btf_put(btf); return ret; } struct btf *btf_get_by_fd(int fd) { struct btf *btf; CLASS(fd, f)(fd); btf = __btf_get_by_fd(f); if (!IS_ERR(btf)) refcount_inc(&btf->refcnt); return btf; } int btf_get_info_by_fd(const struct btf *btf, const union bpf_attr *attr, union bpf_attr __user *uattr) { struct bpf_btf_info __user *uinfo; struct bpf_btf_info info; u32 info_copy, btf_copy; void __user *ubtf; char __user *uname; u32 uinfo_len, uname_len, name_len; int ret = 0; uinfo = u64_to_user_ptr(attr->info.info); uinfo_len = attr->info.info_len; info_copy = min_t(u32, uinfo_len, sizeof(info)); memset(&info, 0, sizeof(info)); if (copy_from_user(&info, uinfo, info_copy)) return -EFAULT; info.id = btf->id; ubtf = u64_to_user_ptr(info.btf); btf_copy = min_t(u32, btf->data_size, info.btf_size); if (copy_to_user(ubtf, btf->data, btf_copy)) return -EFAULT; info.btf_size = btf->data_size; info.kernel_btf = btf->kernel_btf; uname = u64_to_user_ptr(info.name); uname_len = info.name_len; if (!uname ^ !uname_len) return -EINVAL; name_len = strlen(btf->name); info.name_len = name_len; if (uname) { if (uname_len >= name_len + 1) { if (copy_to_user(uname, btf->name, name_len + 1)) return -EFAULT; } else { char zero = '\0'; if (copy_to_user(uname, btf->name, uname_len - 1)) return -EFAULT; if (put_user(zero, uname + uname_len - 1)) return -EFAULT; /* let user-space know about too short buffer */ ret = -ENOSPC; } } if (copy_to_user(uinfo, &info, info_copy) || put_user(info_copy, &uattr->info.info_len)) return -EFAULT; return ret; } int btf_get_fd_by_id(u32 id) { struct btf *btf; int fd; rcu_read_lock(); btf = idr_find(&btf_idr, id); if (!btf || !refcount_inc_not_zero(&btf->refcnt)) btf = ERR_PTR(-ENOENT); rcu_read_unlock(); if (IS_ERR(btf)) return PTR_ERR(btf); fd = __btf_new_fd(btf); if (fd < 0) btf_put(btf); return fd; } u32 btf_obj_id(const struct btf *btf) { return btf->id; } bool btf_is_kernel(const struct btf *btf) { return btf->kernel_btf; } bool btf_is_module(const struct btf *btf) { return btf->kernel_btf && strcmp(btf->name, "vmlinux") != 0; } enum { BTF_MODULE_F_LIVE = (1 << 0), }; #ifdef CONFIG_DEBUG_INFO_BTF_MODULES struct btf_module { struct list_head list; struct module *module; struct btf *btf; struct bin_attribute *sysfs_attr; int flags; }; static LIST_HEAD(btf_modules); static DEFINE_MUTEX(btf_module_mutex); static void purge_cand_cache(struct btf *btf); static int btf_module_notify(struct notifier_block *nb, unsigned long op, void *module) { struct btf_module *btf_mod, *tmp; struct module *mod = module; struct btf *btf; int err = 0; if (mod->btf_data_size == 0 || (op != MODULE_STATE_COMING && op != MODULE_STATE_LIVE && op != MODULE_STATE_GOING)) goto out; switch (op) { case MODULE_STATE_COMING: btf_mod = kzalloc(sizeof(*btf_mod), GFP_KERNEL); if (!btf_mod) { err = -ENOMEM; goto out; } btf = btf_parse_module(mod->name, mod->btf_data, mod->btf_data_size, mod->btf_base_data, mod->btf_base_data_size); if (IS_ERR(btf)) { kfree(btf_mod); if (!IS_ENABLED(CONFIG_MODULE_ALLOW_BTF_MISMATCH)) { pr_warn("failed to validate module [%s] BTF: %ld\n", mod->name, PTR_ERR(btf)); err = PTR_ERR(btf); } else { pr_warn_once("Kernel module BTF mismatch detected, BTF debug info may be unavailable for some modules\n"); } goto out; } err = btf_alloc_id(btf); if (err) { btf_free(btf); kfree(btf_mod); goto out; } purge_cand_cache(NULL); mutex_lock(&btf_module_mutex); btf_mod->module = module; btf_mod->btf = btf; list_add(&btf_mod->list, &btf_modules); mutex_unlock(&btf_module_mutex); if (IS_ENABLED(CONFIG_SYSFS)) { struct bin_attribute *attr; attr = kzalloc(sizeof(*attr), GFP_KERNEL); if (!attr) goto out; sysfs_bin_attr_init(attr); attr->attr.name = btf->name; attr->attr.mode = 0444; attr->size = btf->data_size; attr->private = btf->data; attr->read = sysfs_bin_attr_simple_read; err = sysfs_create_bin_file(btf_kobj, attr); if (err) { pr_warn("failed to register module [%s] BTF in sysfs: %d\n", mod->name, err); kfree(attr); err = 0; goto out; } btf_mod->sysfs_attr = attr; } break; case MODULE_STATE_LIVE: mutex_lock(&btf_module_mutex); list_for_each_entry_safe(btf_mod, tmp, &btf_modules, list) { if (btf_mod->module != module) continue; btf_mod->flags |= BTF_MODULE_F_LIVE; break; } mutex_unlock(&btf_module_mutex); break; case MODULE_STATE_GOING: mutex_lock(&btf_module_mutex); list_for_each_entry_safe(btf_mod, tmp, &btf_modules, list) { if (btf_mod->module != module) continue; list_del(&btf_mod->list); if (btf_mod->sysfs_attr) sysfs_remove_bin_file(btf_kobj, btf_mod->sysfs_attr); purge_cand_cache(btf_mod->btf); btf_put(btf_mod->btf); kfree(btf_mod->sysfs_attr); kfree(btf_mod); break; } mutex_unlock(&btf_module_mutex); break; } out: return notifier_from_errno(err); } static struct notifier_block btf_module_nb = { .notifier_call = btf_module_notify, }; static int __init btf_module_init(void) { register_module_notifier(&btf_module_nb); return 0; } fs_initcall(btf_module_init); #endif /* CONFIG_DEBUG_INFO_BTF_MODULES */ struct module *btf_try_get_module(const struct btf *btf) { struct module *res = NULL; #ifdef CONFIG_DEBUG_INFO_BTF_MODULES struct btf_module *btf_mod, *tmp; mutex_lock(&btf_module_mutex); list_for_each_entry_safe(btf_mod, tmp, &btf_modules, list) { if (btf_mod->btf != btf) continue; /* We must only consider module whose __init routine has * finished, hence we must check for BTF_MODULE_F_LIVE flag, * which is set from the notifier callback for * MODULE_STATE_LIVE. */ if ((btf_mod->flags & BTF_MODULE_F_LIVE) && try_module_get(btf_mod->module)) res = btf_mod->module; break; } mutex_unlock(&btf_module_mutex); #endif return res; } /* Returns struct btf corresponding to the struct module. * This function can return NULL or ERR_PTR. */ static struct btf *btf_get_module_btf(const struct module *module) { #ifdef CONFIG_DEBUG_INFO_BTF_MODULES struct btf_module *btf_mod, *tmp; #endif struct btf *btf = NULL; if (!module) { btf = bpf_get_btf_vmlinux(); if (!IS_ERR_OR_NULL(btf)) btf_get(btf); return btf; } #ifdef CONFIG_DEBUG_INFO_BTF_MODULES mutex_lock(&btf_module_mutex); list_for_each_entry_safe(btf_mod, tmp, &btf_modules, list) { if (btf_mod->module != module) continue; btf_get(btf_mod->btf); btf = btf_mod->btf; break; } mutex_unlock(&btf_module_mutex); #endif return btf; } static int check_btf_kconfigs(const struct module *module, const char *feature) { if (!module && IS_ENABLED(CONFIG_DEBUG_INFO_BTF)) { pr_err("missing vmlinux BTF, cannot register %s\n", feature); return -ENOENT; } if (module && IS_ENABLED(CONFIG_DEBUG_INFO_BTF_MODULES)) pr_warn("missing module BTF, cannot register %s\n", feature); return 0; } BPF_CALL_4(bpf_btf_find_by_name_kind, char *, name, int, name_sz, u32, kind, int, flags) { struct btf *btf = NULL; int btf_obj_fd = 0; long ret; if (flags) return -EINVAL; if (name_sz <= 1 || name[name_sz - 1]) return -EINVAL; ret = bpf_find_btf_id(name, kind, &btf); if (ret > 0 && btf_is_module(btf)) { btf_obj_fd = __btf_new_fd(btf); if (btf_obj_fd < 0) { btf_put(btf); return btf_obj_fd; } return ret | (((u64)btf_obj_fd) << 32); } if (ret > 0) btf_put(btf); return ret; } const struct bpf_func_proto bpf_btf_find_by_name_kind_proto = { .func = bpf_btf_find_by_name_kind, .gpl_only = false, .ret_type = RET_INTEGER, .arg1_type = ARG_PTR_TO_MEM | MEM_RDONLY, .arg2_type = ARG_CONST_SIZE, .arg3_type = ARG_ANYTHING, .arg4_type = ARG_ANYTHING, }; BTF_ID_LIST_GLOBAL(btf_tracing_ids, MAX_BTF_TRACING_TYPE) #define BTF_TRACING_TYPE(name, type) BTF_ID(struct, type) BTF_TRACING_TYPE_xxx #undef BTF_TRACING_TYPE /* Validate well-formedness of iter argument type. * On success, return positive BTF ID of iter state's STRUCT type. * On error, negative error is returned. */ int btf_check_iter_arg(struct btf *btf, const struct btf_type *func, int arg_idx) { const struct btf_param *arg; const struct btf_type *t; const char *name; int btf_id; if (btf_type_vlen(func) <= arg_idx) return -EINVAL; arg = &btf_params(func)[arg_idx]; t = btf_type_skip_modifiers(btf, arg->type, NULL); if (!t || !btf_type_is_ptr(t)) return -EINVAL; t = btf_type_skip_modifiers(btf, t->type, &btf_id); if (!t || !__btf_type_is_struct(t)) return -EINVAL; name = btf_name_by_offset(btf, t->name_off); if (!name || strncmp(name, ITER_PREFIX, sizeof(ITER_PREFIX) - 1)) return -EINVAL; return btf_id; } static int btf_check_iter_kfuncs(struct btf *btf, const char *func_name, const struct btf_type *func, u32 func_flags) { u32 flags = func_flags & (KF_ITER_NEW | KF_ITER_NEXT | KF_ITER_DESTROY); const char *sfx, *iter_name; const struct btf_type *t; char exp_name[128]; u32 nr_args; int btf_id; /* exactly one of KF_ITER_{NEW,NEXT,DESTROY} can be set */ if (!flags || (flags & (flags - 1))) return -EINVAL; /* any BPF iter kfunc should have `struct bpf_iter_<type> *` first arg */ nr_args = btf_type_vlen(func); if (nr_args < 1) return -EINVAL; btf_id = btf_check_iter_arg(btf, func, 0); if (btf_id < 0) return btf_id; /* sizeof(struct bpf_iter_<type>) should be a multiple of 8 to * fit nicely in stack slots */ t = btf_type_by_id(btf, btf_id); if (t->size == 0 || (t->size % 8)) return -EINVAL; /* validate bpf_iter_<type>_{new,next,destroy}(struct bpf_iter_<type> *) * naming pattern */ iter_name = btf_name_by_offset(btf, t->name_off) + sizeof(ITER_PREFIX) - 1; if (flags & KF_ITER_NEW) sfx = "new"; else if (flags & KF_ITER_NEXT) sfx = "next"; else /* (flags & KF_ITER_DESTROY) */ sfx = "destroy"; snprintf(exp_name, sizeof(exp_name), "bpf_iter_%s_%s", iter_name, sfx); if (strcmp(func_name, exp_name)) return -EINVAL; /* only iter constructor should have extra arguments */ if (!(flags & KF_ITER_NEW) && nr_args != 1) return -EINVAL; if (flags & KF_ITER_NEXT) { /* bpf_iter_<type>_next() should return pointer */ t = btf_type_skip_modifiers(btf, func->type, NULL); if (!t || !btf_type_is_ptr(t)) return -EINVAL; } if (flags & KF_ITER_DESTROY) { /* bpf_iter_<type>_destroy() should return void */ t = btf_type_by_id(btf, func->type); if (!t || !btf_type_is_void(t)) return -EINVAL; } return 0; } static int btf_check_kfunc_protos(struct btf *btf, u32 func_id, u32 func_flags) { const struct btf_type *func; const char *func_name; int err; /* any kfunc should be FUNC -> FUNC_PROTO */ func = btf_type_by_id(btf, func_id); if (!func || !btf_type_is_func(func)) return -EINVAL; /* sanity check kfunc name */ func_name = btf_name_by_offset(btf, func->name_off); if (!func_name || !func_name[0]) return -EINVAL; func = btf_type_by_id(btf, func->type); if (!func || !btf_type_is_func_proto(func)) return -EINVAL; if (func_flags & (KF_ITER_NEW | KF_ITER_NEXT | KF_ITER_DESTROY)) { err = btf_check_iter_kfuncs(btf, func_name, func, func_flags); if (err) return err; } return 0; } /* Kernel Function (kfunc) BTF ID set registration API */ static int btf_populate_kfunc_set(struct btf *btf, enum btf_kfunc_hook hook, const struct btf_kfunc_id_set *kset) { struct btf_kfunc_hook_filter *hook_filter; struct btf_id_set8 *add_set = kset->set; bool vmlinux_set = !btf_is_module(btf); bool add_filter = !!kset->filter; struct btf_kfunc_set_tab *tab; struct btf_id_set8 *set; u32 set_cnt, i; int ret; if (hook >= BTF_KFUNC_HOOK_MAX) { ret = -EINVAL; goto end; } if (!add_set->cnt) return 0; tab = btf->kfunc_set_tab; if (tab && add_filter) { u32 i; hook_filter = &tab->hook_filters[hook]; for (i = 0; i < hook_filter->nr_filters; i++) { if (hook_filter->filters[i] == kset->filter) { add_filter = false; break; } } if (add_filter && hook_filter->nr_filters == BTF_KFUNC_FILTER_MAX_CNT) { ret = -E2BIG; goto end; } } if (!tab) { tab = kzalloc(sizeof(*tab), GFP_KERNEL | __GFP_NOWARN); if (!tab) return -ENOMEM; btf->kfunc_set_tab = tab; } set = tab->sets[hook]; /* Warn when register_btf_kfunc_id_set is called twice for the same hook * for module sets. */ if (WARN_ON_ONCE(set && !vmlinux_set)) { ret = -EINVAL; goto end; } /* In case of vmlinux sets, there may be more than one set being * registered per hook. To create a unified set, we allocate a new set * and concatenate all individual sets being registered. While each set * is individually sorted, they may become unsorted when concatenated, * hence re-sorting the final set again is required to make binary * searching the set using btf_id_set8_contains function work. * * For module sets, we need to allocate as we may need to relocate * BTF ids. */ set_cnt = set ? set->cnt : 0; if (set_cnt > U32_MAX - add_set->cnt) { ret = -EOVERFLOW; goto end; } if (set_cnt + add_set->cnt > BTF_KFUNC_SET_MAX_CNT) { ret = -E2BIG; goto end; } /* Grow set */ set = krealloc(tab->sets[hook], struct_size(set, pairs, set_cnt + add_set->cnt), GFP_KERNEL | __GFP_NOWARN); if (!set) { ret = -ENOMEM; goto end; } /* For newly allocated set, initialize set->cnt to 0 */ if (!tab->sets[hook]) set->cnt = 0; tab->sets[hook] = set; /* Concatenate the two sets */ memcpy(set->pairs + set->cnt, add_set->pairs, add_set->cnt * sizeof(set->pairs[0])); /* Now that the set is copied, update with relocated BTF ids */ for (i = set->cnt; i < set->cnt + add_set->cnt; i++) set->pairs[i].id = btf_relocate_id(btf, set->pairs[i].id); set->cnt += add_set->cnt; sort(set->pairs, set->cnt, sizeof(set->pairs[0]), btf_id_cmp_func, NULL); if (add_filter) { hook_filter = &tab->hook_filters[hook]; hook_filter->filters[hook_filter->nr_filters++] = kset->filter; } return 0; end: btf_free_kfunc_set_tab(btf); return ret; } static u32 *__btf_kfunc_id_set_contains(const struct btf *btf, enum btf_kfunc_hook hook, u32 kfunc_btf_id, const struct bpf_prog *prog) { struct btf_kfunc_hook_filter *hook_filter; struct btf_id_set8 *set; u32 *id, i; if (hook >= BTF_KFUNC_HOOK_MAX) return NULL; if (!btf->kfunc_set_tab) return NULL; hook_filter = &btf->kfunc_set_tab->hook_filters[hook]; for (i = 0; i < hook_filter->nr_filters; i++) { if (hook_filter->filters[i](prog, kfunc_btf_id)) return NULL; } set = btf->kfunc_set_tab->sets[hook]; if (!set) return NULL; id = btf_id_set8_contains(set, kfunc_btf_id); if (!id) return NULL; /* The flags for BTF ID are located next to it */ return id + 1; } static int bpf_prog_type_to_kfunc_hook(enum bpf_prog_type prog_type) { switch (prog_type) { case BPF_PROG_TYPE_UNSPEC: return BTF_KFUNC_HOOK_COMMON; case BPF_PROG_TYPE_XDP: return BTF_KFUNC_HOOK_XDP; case BPF_PROG_TYPE_SCHED_CLS: return BTF_KFUNC_HOOK_TC; case BPF_PROG_TYPE_STRUCT_OPS: return BTF_KFUNC_HOOK_STRUCT_OPS; case BPF_PROG_TYPE_TRACING: case BPF_PROG_TYPE_TRACEPOINT: case BPF_PROG_TYPE_PERF_EVENT: case BPF_PROG_TYPE_LSM: return BTF_KFUNC_HOOK_TRACING; case BPF_PROG_TYPE_SYSCALL: return BTF_KFUNC_HOOK_SYSCALL; case BPF_PROG_TYPE_CGROUP_SKB: case BPF_PROG_TYPE_CGROUP_SOCK: case BPF_PROG_TYPE_CGROUP_DEVICE: case BPF_PROG_TYPE_CGROUP_SOCK_ADDR: case BPF_PROG_TYPE_CGROUP_SOCKOPT: case BPF_PROG_TYPE_CGROUP_SYSCTL: case BPF_PROG_TYPE_SOCK_OPS: return BTF_KFUNC_HOOK_CGROUP; case BPF_PROG_TYPE_SCHED_ACT: return BTF_KFUNC_HOOK_SCHED_ACT; case BPF_PROG_TYPE_SK_SKB: return BTF_KFUNC_HOOK_SK_SKB; case BPF_PROG_TYPE_SOCKET_FILTER: return BTF_KFUNC_HOOK_SOCKET_FILTER; case BPF_PROG_TYPE_LWT_OUT: case BPF_PROG_TYPE_LWT_IN: case BPF_PROG_TYPE_LWT_XMIT: case BPF_PROG_TYPE_LWT_SEG6LOCAL: return BTF_KFUNC_HOOK_LWT; case BPF_PROG_TYPE_NETFILTER: return BTF_KFUNC_HOOK_NETFILTER; case BPF_PROG_TYPE_KPROBE: return BTF_KFUNC_HOOK_KPROBE; default: return BTF_KFUNC_HOOK_MAX; } } /* Caution: * Reference to the module (obtained using btf_try_get_module) corresponding to * the struct btf *MUST* be held when calling this function from verifier * context. This is usually true as we stash references in prog's kfunc_btf_tab; * keeping the reference for the duration of the call provides the necessary * protection for looking up a well-formed btf->kfunc_set_tab. */ u32 *btf_kfunc_id_set_contains(const struct btf *btf, u32 kfunc_btf_id, const struct bpf_prog *prog) { enum bpf_prog_type prog_type = resolve_prog_type(prog); enum btf_kfunc_hook hook; u32 *kfunc_flags; kfunc_flags = __btf_kfunc_id_set_contains(btf, BTF_KFUNC_HOOK_COMMON, kfunc_btf_id, prog); if (kfunc_flags) return kfunc_flags; hook = bpf_prog_type_to_kfunc_hook(prog_type); return __btf_kfunc_id_set_contains(btf, hook, kfunc_btf_id, prog); } u32 *btf_kfunc_is_modify_return(const struct btf *btf, u32 kfunc_btf_id, const struct bpf_prog *prog) { return __btf_kfunc_id_set_contains(btf, BTF_KFUNC_HOOK_FMODRET, kfunc_btf_id, prog); } static int __register_btf_kfunc_id_set(enum btf_kfunc_hook hook, const struct btf_kfunc_id_set *kset) { struct btf *btf; int ret, i; btf = btf_get_module_btf(kset->owner); if (!btf) return check_btf_kconfigs(kset->owner, "kfunc"); if (IS_ERR(btf)) return PTR_ERR(btf); for (i = 0; i < kset->set->cnt; i++) { ret = btf_check_kfunc_protos(btf, btf_relocate_id(btf, kset->set->pairs[i].id), kset->set->pairs[i].flags); if (ret) goto err_out; } ret = btf_populate_kfunc_set(btf, hook, kset); err_out: btf_put(btf); return ret; } /* This function must be invoked only from initcalls/module init functions */ int register_btf_kfunc_id_set(enum bpf_prog_type prog_type, const struct btf_kfunc_id_set *kset) { enum btf_kfunc_hook hook; /* All kfuncs need to be tagged as such in BTF. * WARN() for initcall registrations that do not check errors. */ if (!(kset->set->flags & BTF_SET8_KFUNCS)) { WARN_ON(!kset->owner); return -EINVAL; } hook = bpf_prog_type_to_kfunc_hook(prog_type); return __register_btf_kfunc_id_set(hook, kset); } EXPORT_SYMBOL_GPL(register_btf_kfunc_id_set); /* This function must be invoked only from initcalls/module init functions */ int register_btf_fmodret_id_set(const struct btf_kfunc_id_set *kset) { return __register_btf_kfunc_id_set(BTF_KFUNC_HOOK_FMODRET, kset); } EXPORT_SYMBOL_GPL(register_btf_fmodret_id_set); s32 btf_find_dtor_kfunc(struct btf *btf, u32 btf_id) { struct btf_id_dtor_kfunc_tab *tab = btf->dtor_kfunc_tab; struct btf_id_dtor_kfunc *dtor; if (!tab) return -ENOENT; /* Even though the size of tab->dtors[0] is > sizeof(u32), we only need * to compare the first u32 with btf_id, so we can reuse btf_id_cmp_func. */ BUILD_BUG_ON(offsetof(struct btf_id_dtor_kfunc, btf_id) != 0); dtor = bsearch(&btf_id, tab->dtors, tab->cnt, sizeof(tab->dtors[0]), btf_id_cmp_func); if (!dtor) return -ENOENT; return dtor->kfunc_btf_id; } static int btf_check_dtor_kfuncs(struct btf *btf, const struct btf_id_dtor_kfunc *dtors, u32 cnt) { const struct btf_type *dtor_func, *dtor_func_proto, *t; const struct btf_param *args; s32 dtor_btf_id; u32 nr_args, i; for (i = 0; i < cnt; i++) { dtor_btf_id = btf_relocate_id(btf, dtors[i].kfunc_btf_id); dtor_func = btf_type_by_id(btf, dtor_btf_id); if (!dtor_func || !btf_type_is_func(dtor_func)) return -EINVAL; dtor_func_proto = btf_type_by_id(btf, dtor_func->type); if (!dtor_func_proto || !btf_type_is_func_proto(dtor_func_proto)) return -EINVAL; /* Make sure the prototype of the destructor kfunc is 'void func(type *)' */ t = btf_type_by_id(btf, dtor_func_proto->type); if (!t || !btf_type_is_void(t)) return -EINVAL; nr_args = btf_type_vlen(dtor_func_proto); if (nr_args != 1) return -EINVAL; args = btf_params(dtor_func_proto); t = btf_type_by_id(btf, args[0].type); /* Allow any pointer type, as width on targets Linux supports * will be same for all pointer types (i.e. sizeof(void *)) */ if (!t || !btf_type_is_ptr(t)) return -EINVAL; } return 0; } /* This function must be invoked only from initcalls/module init functions */ int register_btf_id_dtor_kfuncs(const struct btf_id_dtor_kfunc *dtors, u32 add_cnt, struct module *owner) { struct btf_id_dtor_kfunc_tab *tab; struct btf *btf; u32 tab_cnt, i; int ret; btf = btf_get_module_btf(owner); if (!btf) return check_btf_kconfigs(owner, "dtor kfuncs"); if (IS_ERR(btf)) return PTR_ERR(btf); if (add_cnt >= BTF_DTOR_KFUNC_MAX_CNT) { pr_err("cannot register more than %d kfunc destructors\n", BTF_DTOR_KFUNC_MAX_CNT); ret = -E2BIG; goto end; } /* Ensure that the prototype of dtor kfuncs being registered is sane */ ret = btf_check_dtor_kfuncs(btf, dtors, add_cnt); if (ret < 0) goto end; tab = btf->dtor_kfunc_tab; /* Only one call allowed for modules */ if (WARN_ON_ONCE(tab && btf_is_module(btf))) { ret = -EINVAL; goto end; } tab_cnt = tab ? tab->cnt : 0; if (tab_cnt > U32_MAX - add_cnt) { ret = -EOVERFLOW; goto end; } if (tab_cnt + add_cnt >= BTF_DTOR_KFUNC_MAX_CNT) { pr_err("cannot register more than %d kfunc destructors\n", BTF_DTOR_KFUNC_MAX_CNT); ret = -E2BIG; goto end; } tab = krealloc(btf->dtor_kfunc_tab, struct_size(tab, dtors, tab_cnt + add_cnt), GFP_KERNEL | __GFP_NOWARN); if (!tab) { ret = -ENOMEM; goto end; } if (!btf->dtor_kfunc_tab) tab->cnt = 0; btf->dtor_kfunc_tab = tab; memcpy(tab->dtors + tab->cnt, dtors, add_cnt * sizeof(tab->dtors[0])); /* remap BTF ids based on BTF relocation (if any) */ for (i = tab_cnt; i < tab_cnt + add_cnt; i++) { tab->dtors[i].btf_id = btf_relocate_id(btf, tab->dtors[i].btf_id); tab->dtors[i].kfunc_btf_id = btf_relocate_id(btf, tab->dtors[i].kfunc_btf_id); } tab->cnt += add_cnt; sort(tab->dtors, tab->cnt, sizeof(tab->dtors[0]), btf_id_cmp_func, NULL); end: if (ret) btf_free_dtor_kfunc_tab(btf); btf_put(btf); return ret; } EXPORT_SYMBOL_GPL(register_btf_id_dtor_kfuncs); #define MAX_TYPES_ARE_COMPAT_DEPTH 2 /* Check local and target types for compatibility. This check is used for * type-based CO-RE relocations and follow slightly different rules than * field-based relocations. This function assumes that root types were already * checked for name match. Beyond that initial root-level name check, names * are completely ignored. Compatibility rules are as follows: * - any two STRUCTs/UNIONs/FWDs/ENUMs/INTs/ENUM64s are considered compatible, but * kind should match for local and target types (i.e., STRUCT is not * compatible with UNION); * - for ENUMs/ENUM64s, the size is ignored; * - for INT, size and signedness are ignored; * - for ARRAY, dimensionality is ignored, element types are checked for * compatibility recursively; * - CONST/VOLATILE/RESTRICT modifiers are ignored; * - TYPEDEFs/PTRs are compatible if types they pointing to are compatible; * - FUNC_PROTOs are compatible if they have compatible signature: same * number of input args and compatible return and argument types. * These rules are not set in stone and probably will be adjusted as we get * more experience with using BPF CO-RE relocations. */ int bpf_core_types_are_compat(const struct btf *local_btf, __u32 local_id, const struct btf *targ_btf, __u32 targ_id) { return __bpf_core_types_are_compat(local_btf, local_id, targ_btf, targ_id, MAX_TYPES_ARE_COMPAT_DEPTH); } #define MAX_TYPES_MATCH_DEPTH 2 int bpf_core_types_match(const struct btf *local_btf, u32 local_id, const struct btf *targ_btf, u32 targ_id) { return __bpf_core_types_match(local_btf, local_id, targ_btf, targ_id, false, MAX_TYPES_MATCH_DEPTH); } static bool bpf_core_is_flavor_sep(const char *s) { /* check X___Y name pattern, where X and Y are not underscores */ return s[0] != '_' && /* X */ s[1] == '_' && s[2] == '_' && s[3] == '_' && /* ___ */ s[4] != '_'; /* Y */ } size_t bpf_core_essential_name_len(const char *name) { size_t n = strlen(name); int i; for (i = n - 5; i >= 0; i--) { if (bpf_core_is_flavor_sep(name + i)) return i + 1; } return n; } static void bpf_free_cands(struct bpf_cand_cache *cands) { if (!cands->cnt) /* empty candidate array was allocated on stack */ return; kfree(cands); } static void bpf_free_cands_from_cache(struct bpf_cand_cache *cands) { kfree(cands->name); kfree(cands); } #define VMLINUX_CAND_CACHE_SIZE 31 static struct bpf_cand_cache *vmlinux_cand_cache[VMLINUX_CAND_CACHE_SIZE]; #define MODULE_CAND_CACHE_SIZE 31 static struct bpf_cand_cache *module_cand_cache[MODULE_CAND_CACHE_SIZE]; static void __print_cand_cache(struct bpf_verifier_log *log, struct bpf_cand_cache **cache, int cache_size) { struct bpf_cand_cache *cc; int i, j; for (i = 0; i < cache_size; i++) { cc = cache[i]; if (!cc) continue; bpf_log(log, "[%d]%s(", i, cc->name); for (j = 0; j < cc->cnt; j++) { bpf_log(log, "%d", cc->cands[j].id); if (j < cc->cnt - 1) bpf_log(log, " "); } bpf_log(log, "), "); } } static void print_cand_cache(struct bpf_verifier_log *log) { mutex_lock(&cand_cache_mutex); bpf_log(log, "vmlinux_cand_cache:"); __print_cand_cache(log, vmlinux_cand_cache, VMLINUX_CAND_CACHE_SIZE); bpf_log(log, "\nmodule_cand_cache:"); __print_cand_cache(log, module_cand_cache, MODULE_CAND_CACHE_SIZE); bpf_log(log, "\n"); mutex_unlock(&cand_cache_mutex); } static u32 hash_cands(struct bpf_cand_cache *cands) { return jhash(cands->name, cands->name_len, 0); } static struct bpf_cand_cache *check_cand_cache(struct bpf_cand_cache *cands, struct bpf_cand_cache **cache, int cache_size) { struct bpf_cand_cache *cc = cache[hash_cands(cands) % cache_size]; if (cc && cc->name_len == cands->name_len && !strncmp(cc->name, cands->name, cands->name_len)) return cc; return NULL; } static size_t sizeof_cands(int cnt) { return offsetof(struct bpf_cand_cache, cands[cnt]); } static struct bpf_cand_cache *populate_cand_cache(struct bpf_cand_cache *cands, struct bpf_cand_cache **cache, int cache_size) { struct bpf_cand_cache **cc = &cache[hash_cands(cands) % cache_size], *new_cands; if (*cc) { bpf_free_cands_from_cache(*cc); *cc = NULL; } new_cands = kmemdup(cands, sizeof_cands(cands->cnt), GFP_KERNEL_ACCOUNT); if (!new_cands) { bpf_free_cands(cands); return ERR_PTR(-ENOMEM); } /* strdup the name, since it will stay in cache. * the cands->name points to strings in prog's BTF and the prog can be unloaded. */ new_cands->name = kmemdup_nul(cands->name, cands->name_len, GFP_KERNEL_ACCOUNT); bpf_free_cands(cands); if (!new_cands->name) { kfree(new_cands); return ERR_PTR(-ENOMEM); } *cc = new_cands; return new_cands; } #ifdef CONFIG_DEBUG_INFO_BTF_MODULES static void __purge_cand_cache(struct btf *btf, struct bpf_cand_cache **cache, int cache_size) { struct bpf_cand_cache *cc; int i, j; for (i = 0; i < cache_size; i++) { cc = cache[i]; if (!cc) continue; if (!btf) { /* when new module is loaded purge all of module_cand_cache, * since new module might have candidates with the name * that matches cached cands. */ bpf_free_cands_from_cache(cc); cache[i] = NULL; continue; } /* when module is unloaded purge cache entries * that match module's btf */ for (j = 0; j < cc->cnt; j++) if (cc->cands[j].btf == btf) { bpf_free_cands_from_cache(cc); cache[i] = NULL; break; } } } static void purge_cand_cache(struct btf *btf) { mutex_lock(&cand_cache_mutex); __purge_cand_cache(btf, module_cand_cache, MODULE_CAND_CACHE_SIZE); mutex_unlock(&cand_cache_mutex); } #endif static struct bpf_cand_cache * bpf_core_add_cands(struct bpf_cand_cache *cands, const struct btf *targ_btf, int targ_start_id) { struct bpf_cand_cache *new_cands; const struct btf_type *t; const char *targ_name; size_t targ_essent_len; int n, i; n = btf_nr_types(targ_btf); for (i = targ_start_id; i < n; i++) { t = btf_type_by_id(targ_btf, i); if (btf_kind(t) != cands->kind) continue; targ_name = btf_name_by_offset(targ_btf, t->name_off); if (!targ_name) continue; /* the resched point is before strncmp to make sure that search * for non-existing name will have a chance to schedule(). */ cond_resched(); if (strncmp(cands->name, targ_name, cands->name_len) != 0) continue; targ_essent_len = bpf_core_essential_name_len(targ_name); if (targ_essent_len != cands->name_len) continue; /* most of the time there is only one candidate for a given kind+name pair */ new_cands = kmalloc(sizeof_cands(cands->cnt + 1), GFP_KERNEL_ACCOUNT); if (!new_cands) { bpf_free_cands(cands); return ERR_PTR(-ENOMEM); } memcpy(new_cands, cands, sizeof_cands(cands->cnt)); bpf_free_cands(cands); cands = new_cands; cands->cands[cands->cnt].btf = targ_btf; cands->cands[cands->cnt].id = i; cands->cnt++; } return cands; } static struct bpf_cand_cache * bpf_core_find_cands(struct bpf_core_ctx *ctx, u32 local_type_id) { struct bpf_cand_cache *cands, *cc, local_cand = {}; const struct btf *local_btf = ctx->btf; const struct btf_type *local_type; const struct btf *main_btf; size_t local_essent_len; struct btf *mod_btf; const char *name; int id; main_btf = bpf_get_btf_vmlinux(); if (IS_ERR(main_btf)) return ERR_CAST(main_btf); if (!main_btf) return ERR_PTR(-EINVAL); local_type = btf_type_by_id(local_btf, local_type_id); if (!local_type) return ERR_PTR(-EINVAL); name = btf_name_by_offset(local_btf, local_type->name_off); if (str_is_empty(name)) return ERR_PTR(-EINVAL); local_essent_len = bpf_core_essential_name_len(name); cands = &local_cand; cands->name = name; cands->kind = btf_kind(local_type); cands->name_len = local_essent_len; cc = check_cand_cache(cands, vmlinux_cand_cache, VMLINUX_CAND_CACHE_SIZE); /* cands is a pointer to stack here */ if (cc) { if (cc->cnt) return cc; goto check_modules; } /* Attempt to find target candidates in vmlinux BTF first */ cands = bpf_core_add_cands(cands, main_btf, 1); if (IS_ERR(cands)) return ERR_CAST(cands); /* cands is a pointer to kmalloced memory here if cands->cnt > 0 */ /* populate cache even when cands->cnt == 0 */ cc = populate_cand_cache(cands, vmlinux_cand_cache, VMLINUX_CAND_CACHE_SIZE); if (IS_ERR(cc)) return ERR_CAST(cc); /* if vmlinux BTF has any candidate, don't go for module BTFs */ if (cc->cnt) return cc; check_modules: /* cands is a pointer to stack here and cands->cnt == 0 */ cc = check_cand_cache(cands, module_cand_cache, MODULE_CAND_CACHE_SIZE); if (cc) /* if cache has it return it even if cc->cnt == 0 */ return cc; /* If candidate is not found in vmlinux's BTF then search in module's BTFs */ spin_lock_bh(&btf_idr_lock); idr_for_each_entry(&btf_idr, mod_btf, id) { if (!btf_is_module(mod_btf)) continue; /* linear search could be slow hence unlock/lock * the IDR to avoiding holding it for too long */ btf_get(mod_btf); spin_unlock_bh(&btf_idr_lock); cands = bpf_core_add_cands(cands, mod_btf, btf_nr_types(main_btf)); btf_put(mod_btf); if (IS_ERR(cands)) return ERR_CAST(cands); spin_lock_bh(&btf_idr_lock); } spin_unlock_bh(&btf_idr_lock); /* cands is a pointer to kmalloced memory here if cands->cnt > 0 * or pointer to stack if cands->cnd == 0. * Copy it into the cache even when cands->cnt == 0 and * return the result. */ return populate_cand_cache(cands, module_cand_cache, MODULE_CAND_CACHE_SIZE); } int bpf_core_apply(struct bpf_core_ctx *ctx, const struct bpf_core_relo *relo, int relo_idx, void *insn) { bool need_cands = relo->kind != BPF_CORE_TYPE_ID_LOCAL; struct bpf_core_cand_list cands = {}; struct bpf_core_relo_res targ_res; struct bpf_core_spec *specs; const struct btf_type *type; int err; /* ~4k of temp memory necessary to convert LLVM spec like "0:1:0:5" * into arrays of btf_ids of struct fields and array indices. */ specs = kcalloc(3, sizeof(*specs), GFP_KERNEL_ACCOUNT); if (!specs) return -ENOMEM; type = btf_type_by_id(ctx->btf, relo->type_id); if (!type) { bpf_log(ctx->log, "relo #%u: bad type id %u\n", relo_idx, relo->type_id); kfree(specs); return -EINVAL; } if (need_cands) { struct bpf_cand_cache *cc; int i; mutex_lock(&cand_cache_mutex); cc = bpf_core_find_cands(ctx, relo->type_id); if (IS_ERR(cc)) { bpf_log(ctx->log, "target candidate search failed for %d\n", relo->type_id); err = PTR_ERR(cc); goto out; } if (cc->cnt) { cands.cands = kcalloc(cc->cnt, sizeof(*cands.cands), GFP_KERNEL_ACCOUNT); if (!cands.cands) { err = -ENOMEM; goto out; } } for (i = 0; i < cc->cnt; i++) { bpf_log(ctx->log, "CO-RE relocating %s %s: found target candidate [%d]\n", btf_kind_str[cc->kind], cc->name, cc->cands[i].id); cands.cands[i].btf = cc->cands[i].btf; cands.cands[i].id = cc->cands[i].id; } cands.len = cc->cnt; /* cand_cache_mutex needs to span the cache lookup and * copy of btf pointer into bpf_core_cand_list, * since module can be unloaded while bpf_core_calc_relo_insn * is working with module's btf. */ } err = bpf_core_calc_relo_insn((void *)ctx->log, relo, relo_idx, ctx->btf, &cands, specs, &targ_res); if (err) goto out; err = bpf_core_patch_insn((void *)ctx->log, insn, relo->insn_off / 8, relo, relo_idx, &targ_res); out: kfree(specs); if (need_cands) { kfree(cands.cands); mutex_unlock(&cand_cache_mutex); if (ctx->log->level & BPF_LOG_LEVEL2) print_cand_cache(ctx->log); } return err; } bool btf_nested_type_is_trusted(struct bpf_verifier_log *log, const struct bpf_reg_state *reg, const char *field_name, u32 btf_id, const char *suffix) { struct btf *btf = reg->btf; const struct btf_type *walk_type, *safe_type; const char *tname; char safe_tname[64]; long ret, safe_id; const struct btf_member *member; u32 i; walk_type = btf_type_by_id(btf, reg->btf_id); if (!walk_type) return false; tname = btf_name_by_offset(btf, walk_type->name_off); ret = snprintf(safe_tname, sizeof(safe_tname), "%s%s", tname, suffix); if (ret >= sizeof(safe_tname)) return false; safe_id = btf_find_by_name_kind(btf, safe_tname, BTF_INFO_KIND(walk_type->info)); if (safe_id < 0) return false; safe_type = btf_type_by_id(btf, safe_id); if (!safe_type) return false; for_each_member(i, safe_type, member) { const char *m_name = __btf_name_by_offset(btf, member->name_off); const struct btf_type *mtype = btf_type_by_id(btf, member->type); u32 id; if (!btf_type_is_ptr(mtype)) continue; btf_type_skip_modifiers(btf, mtype->type, &id); /* If we match on both type and name, the field is considered trusted. */ if (btf_id == id && !strcmp(field_name, m_name)) return true; } return false; } bool btf_type_ids_nocast_alias(struct bpf_verifier_log *log, const struct btf *reg_btf, u32 reg_id, const struct btf *arg_btf, u32 arg_id) { const char *reg_name, *arg_name, *search_needle; const struct btf_type *reg_type, *arg_type; int reg_len, arg_len, cmp_len; size_t pattern_len = sizeof(NOCAST_ALIAS_SUFFIX) - sizeof(char); reg_type = btf_type_by_id(reg_btf, reg_id); if (!reg_type) return false; arg_type = btf_type_by_id(arg_btf, arg_id); if (!arg_type) return false; reg_name = btf_name_by_offset(reg_btf, reg_type->name_off); arg_name = btf_name_by_offset(arg_btf, arg_type->name_off); reg_len = strlen(reg_name); arg_len = strlen(arg_name); /* Exactly one of the two type names may be suffixed with ___init, so * if the strings are the same size, they can't possibly be no-cast * aliases of one another. If you have two of the same type names, e.g. * they're both nf_conn___init, it would be improper to return true * because they are _not_ no-cast aliases, they are the same type. */ if (reg_len == arg_len) return false; /* Either of the two names must be the other name, suffixed with ___init. */ if ((reg_len != arg_len + pattern_len) && (arg_len != reg_len + pattern_len)) return false; if (reg_len < arg_len) { search_needle = strstr(arg_name, NOCAST_ALIAS_SUFFIX); cmp_len = reg_len; } else { search_needle = strstr(reg_name, NOCAST_ALIAS_SUFFIX); cmp_len = arg_len; } if (!search_needle) return false; /* ___init suffix must come at the end of the name */ if (*(search_needle + pattern_len) != '\0') return false; return !strncmp(reg_name, arg_name, cmp_len); } #ifdef CONFIG_BPF_JIT static int btf_add_struct_ops(struct btf *btf, struct bpf_struct_ops *st_ops, struct bpf_verifier_log *log) { struct btf_struct_ops_tab *tab, *new_tab; int i, err; tab = btf->struct_ops_tab; if (!tab) { tab = kzalloc(struct_size(tab, ops, 4), GFP_KERNEL); if (!tab) return -ENOMEM; tab->capacity = 4; btf->struct_ops_tab = tab; } for (i = 0; i < tab->cnt; i++) if (tab->ops[i].st_ops == st_ops) return -EEXIST; if (tab->cnt == tab->capacity) { new_tab = krealloc(tab, struct_size(tab, ops, tab->capacity * 2), GFP_KERNEL); if (!new_tab) return -ENOMEM; tab = new_tab; tab->capacity *= 2; btf->struct_ops_tab = tab; } tab->ops[btf->struct_ops_tab->cnt].st_ops = st_ops; err = bpf_struct_ops_desc_init(&tab->ops[btf->struct_ops_tab->cnt], btf, log); if (err) return err; btf->struct_ops_tab->cnt++; return 0; } const struct bpf_struct_ops_desc * bpf_struct_ops_find_value(struct btf *btf, u32 value_id) { const struct bpf_struct_ops_desc *st_ops_list; unsigned int i; u32 cnt; if (!value_id) return NULL; if (!btf->struct_ops_tab) return NULL; cnt = btf->struct_ops_tab->cnt; st_ops_list = btf->struct_ops_tab->ops; for (i = 0; i < cnt; i++) { if (st_ops_list[i].value_id == value_id) return &st_ops_list[i]; } return NULL; } const struct bpf_struct_ops_desc * bpf_struct_ops_find(struct btf *btf, u32 type_id) { const struct bpf_struct_ops_desc *st_ops_list; unsigned int i; u32 cnt; if (!type_id) return NULL; if (!btf->struct_ops_tab) return NULL; cnt = btf->struct_ops_tab->cnt; st_ops_list = btf->struct_ops_tab->ops; for (i = 0; i < cnt; i++) { if (st_ops_list[i].type_id == type_id) return &st_ops_list[i]; } return NULL; } int __register_bpf_struct_ops(struct bpf_struct_ops *st_ops) { struct bpf_verifier_log *log; struct btf *btf; int err = 0; btf = btf_get_module_btf(st_ops->owner); if (!btf) return check_btf_kconfigs(st_ops->owner, "struct_ops"); if (IS_ERR(btf)) return PTR_ERR(btf); log = kzalloc(sizeof(*log), GFP_KERNEL | __GFP_NOWARN); if (!log) { err = -ENOMEM; goto errout; } log->level = BPF_LOG_KERNEL; err = btf_add_struct_ops(btf, st_ops, log); errout: kfree(log); btf_put(btf); return err; } EXPORT_SYMBOL_GPL(__register_bpf_struct_ops); #endif bool btf_param_match_suffix(const struct btf *btf, const struct btf_param *arg, const char *suffix) { int suffix_len = strlen(suffix), len; const char *param_name; /* In the future, this can be ported to use BTF tagging */ param_name = btf_name_by_offset(btf, arg->name_off); if (str_is_empty(param_name)) return false; len = strlen(param_name); if (len <= suffix_len) return false; param_name += len - suffix_len; return !strncmp(param_name, suffix, suffix_len); } |
| 5 4 4 4 2 2 1 1 2 5 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 | // SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2016 Pablo Neira Ayuso <pablo@netfilter.org> */ #include <linux/kernel.h> #include <linux/init.h> #include <linux/module.h> #include <linux/netlink.h> #include <linux/netfilter.h> #include <linux/netfilter/nf_tables.h> #include <net/netfilter/nf_tables_core.h> #include <net/netfilter/nf_tables.h> struct nft_range_expr { struct nft_data data_from; struct nft_data data_to; u8 sreg; u8 len; enum nft_range_ops op:8; }; void nft_range_eval(const struct nft_expr *expr, struct nft_regs *regs, const struct nft_pktinfo *pkt) { const struct nft_range_expr *priv = nft_expr_priv(expr); int d1, d2; d1 = memcmp(®s->data[priv->sreg], &priv->data_from, priv->len); d2 = memcmp(®s->data[priv->sreg], &priv->data_to, priv->len); switch (priv->op) { case NFT_RANGE_EQ: if (d1 < 0 || d2 > 0) regs->verdict.code = NFT_BREAK; break; case NFT_RANGE_NEQ: if (d1 >= 0 && d2 <= 0) regs->verdict.code = NFT_BREAK; break; } } static const struct nla_policy nft_range_policy[NFTA_RANGE_MAX + 1] = { [NFTA_RANGE_SREG] = { .type = NLA_U32 }, [NFTA_RANGE_OP] = NLA_POLICY_MAX(NLA_BE32, 255), [NFTA_RANGE_FROM_DATA] = { .type = NLA_NESTED }, [NFTA_RANGE_TO_DATA] = { .type = NLA_NESTED }, }; static int nft_range_init(const struct nft_ctx *ctx, const struct nft_expr *expr, const struct nlattr * const tb[]) { struct nft_range_expr *priv = nft_expr_priv(expr); struct nft_data_desc desc_from = { .type = NFT_DATA_VALUE, .size = sizeof(priv->data_from), }; struct nft_data_desc desc_to = { .type = NFT_DATA_VALUE, .size = sizeof(priv->data_to), }; int err; u32 op; if (!tb[NFTA_RANGE_SREG] || !tb[NFTA_RANGE_OP] || !tb[NFTA_RANGE_FROM_DATA] || !tb[NFTA_RANGE_TO_DATA]) return -EINVAL; err = nft_data_init(NULL, &priv->data_from, &desc_from, tb[NFTA_RANGE_FROM_DATA]); if (err < 0) return err; err = nft_data_init(NULL, &priv->data_to, &desc_to, tb[NFTA_RANGE_TO_DATA]); if (err < 0) goto err1; if (desc_from.len != desc_to.len) { err = -EINVAL; goto err2; } err = nft_parse_register_load(ctx, tb[NFTA_RANGE_SREG], &priv->sreg, desc_from.len); if (err < 0) goto err2; err = nft_parse_u32_check(tb[NFTA_RANGE_OP], U8_MAX, &op); if (err < 0) goto err2; switch (op) { case NFT_RANGE_EQ: case NFT_RANGE_NEQ: break; default: err = -EINVAL; goto err2; } priv->op = op; priv->len = desc_from.len; return 0; err2: nft_data_release(&priv->data_to, desc_to.type); err1: nft_data_release(&priv->data_from, desc_from.type); return err; } static int nft_range_dump(struct sk_buff *skb, const struct nft_expr *expr, bool reset) { const struct nft_range_expr *priv = nft_expr_priv(expr); if (nft_dump_register(skb, NFTA_RANGE_SREG, priv->sreg)) goto nla_put_failure; if (nla_put_be32(skb, NFTA_RANGE_OP, htonl(priv->op))) goto nla_put_failure; if (nft_data_dump(skb, NFTA_RANGE_FROM_DATA, &priv->data_from, NFT_DATA_VALUE, priv->len) < 0 || nft_data_dump(skb, NFTA_RANGE_TO_DATA, &priv->data_to, NFT_DATA_VALUE, priv->len) < 0) goto nla_put_failure; return 0; nla_put_failure: return -1; } static const struct nft_expr_ops nft_range_ops = { .type = &nft_range_type, .size = NFT_EXPR_SIZE(sizeof(struct nft_range_expr)), .eval = nft_range_eval, .init = nft_range_init, .dump = nft_range_dump, .reduce = NFT_REDUCE_READONLY, }; struct nft_expr_type nft_range_type __read_mostly = { .name = "range", .ops = &nft_range_ops, .policy = nft_range_policy, .maxattr = NFTA_RANGE_MAX, .owner = THIS_MODULE, }; |
| 362 363 363 362 363 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | /* SPDX-License-Identifier: GPL-2.0-only */ #ifndef __LICENSE_H #define __LICENSE_H static inline int license_is_gpl_compatible(const char *license) { return (strcmp(license, "GPL") == 0 || strcmp(license, "GPL v2") == 0 || strcmp(license, "GPL and additional rights") == 0 || strcmp(license, "Dual BSD/GPL") == 0 || strcmp(license, "Dual MIT/GPL") == 0 || strcmp(license, "Dual MPL/GPL") == 0); } #endif |
| 2 2 1 1 1 1 2 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 | // SPDX-License-Identifier: GPL-2.0-or-later /* * Squashfs - a compressed read only filesystem for Linux * * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008 * Phillip Lougher <phillip@squashfs.org.uk> * * symlink.c */ /* * This file implements code to handle symbolic links. * * The data contents of symbolic links are stored inside the symbolic * link inode within the inode table. This allows the normally small symbolic * link to be compressed as part of the inode table, achieving much greater * compression than if the symbolic link was compressed individually. */ #include <linux/fs.h> #include <linux/vfs.h> #include <linux/kernel.h> #include <linux/string.h> #include <linux/pagemap.h> #include <linux/xattr.h> #include "squashfs_fs.h" #include "squashfs_fs_sb.h" #include "squashfs_fs_i.h" #include "squashfs.h" #include "xattr.h" static int squashfs_symlink_read_folio(struct file *file, struct folio *folio) { struct inode *inode = folio->mapping->host; struct super_block *sb = inode->i_sb; struct squashfs_sb_info *msblk = sb->s_fs_info; int index = folio_pos(folio); u64 block = squashfs_i(inode)->start; int offset = squashfs_i(inode)->offset; int length = min_t(int, i_size_read(inode) - index, PAGE_SIZE); int bytes, copied, error; void *pageaddr; struct squashfs_cache_entry *entry; TRACE("Entered squashfs_symlink_readpage, page index %ld, start block " "%llx, offset %x\n", folio->index, block, offset); /* * Skip index bytes into symlink metadata. */ if (index) { bytes = squashfs_read_metadata(sb, NULL, &block, &offset, index); if (bytes < 0) { ERROR("Unable to read symlink [%llx:%x]\n", squashfs_i(inode)->start, squashfs_i(inode)->offset); error = bytes; goto out; } } /* * Read length bytes from symlink metadata. Squashfs_read_metadata * is not used here because it can sleep and we want to use * kmap_local to map the folio. Instead call the underlying * squashfs_cache_get routine. As length bytes may overlap metadata * blocks, we may need to call squashfs_cache_get multiple times. */ for (bytes = 0; bytes < length; offset = 0, bytes += copied) { entry = squashfs_cache_get(sb, msblk->block_cache, block, 0); if (entry->error) { ERROR("Unable to read symlink [%llx:%x]\n", squashfs_i(inode)->start, squashfs_i(inode)->offset); squashfs_cache_put(entry); error = entry->error; goto out; } pageaddr = kmap_local_folio(folio, 0); copied = squashfs_copy_data(pageaddr + bytes, entry, offset, length - bytes); if (copied == length - bytes) memset(pageaddr + length, 0, PAGE_SIZE - length); else block = entry->next_index; kunmap_local(pageaddr); squashfs_cache_put(entry); } flush_dcache_folio(folio); error = 0; out: folio_end_read(folio, error == 0); return error; } const struct address_space_operations squashfs_symlink_aops = { .read_folio = squashfs_symlink_read_folio }; const struct inode_operations squashfs_symlink_inode_ops = { .get_link = page_get_link, .listxattr = squashfs_listxattr }; |
| 6 19 47 18 105 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 | // SPDX-License-Identifier: MIT #include <drm/drm_atomic.h> #include <drm/drm_crtc.h> #include <drm/drm_managed.h> #include <drm/drm_modeset_helper_vtables.h> #include <drm/drm_print.h> #include <drm/drm_vblank.h> #include <drm/drm_vblank_helper.h> /** * DOC: overview * * The vblank helper library provides functions for supporting vertical * blanking in DRM drivers. * * For vblank timers, several callback implementations are available. * Drivers enable support for vblank timers by setting the vblank callbacks * in struct &drm_crtc_funcs to the helpers provided by this library. The * initializer macro DRM_CRTC_VBLANK_TIMER_FUNCS does this conveniently. * The driver further has to send the VBLANK event from its atomic_flush * callback and control vblank from the CRTC's atomic_enable and atomic_disable * callbacks. The callbacks are located in struct &drm_crtc_helper_funcs. * The vblank helper library provides implementations of these callbacks * for drivers without further requirements. The initializer macro * DRM_CRTC_HELPER_VBLANK_FUNCS sets them coveniently. * * Once the driver enables vblank support with drm_vblank_init(), each * CRTC's vblank timer fires according to the programmed display mode. By * default, the vblank timer invokes drm_crtc_handle_vblank(). Drivers with * more specific requirements can set their own handler function in * struct &drm_crtc_helper_funcs.handle_vblank_timeout. */ /* * VBLANK helpers */ /** * drm_crtc_vblank_atomic_flush - * Implements struct &drm_crtc_helper_funcs.atomic_flush * @crtc: The CRTC * @state: The atomic state to apply * * The helper drm_crtc_vblank_atomic_flush() implements atomic_flush of * struct drm_crtc_helper_funcs for CRTCs that only need to send out a * VBLANK event. * * See also struct &drm_crtc_helper_funcs.atomic_flush. */ void drm_crtc_vblank_atomic_flush(struct drm_crtc *crtc, struct drm_atomic_state *state) { struct drm_device *dev = crtc->dev; struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, crtc); struct drm_pending_vblank_event *event; spin_lock_irq(&dev->event_lock); event = crtc_state->event; crtc_state->event = NULL; if (event) { if (drm_crtc_vblank_get(crtc) == 0) drm_crtc_arm_vblank_event(crtc, event); else drm_crtc_send_vblank_event(crtc, event); } spin_unlock_irq(&dev->event_lock); } EXPORT_SYMBOL(drm_crtc_vblank_atomic_flush); /** * drm_crtc_vblank_atomic_enable - Implements struct &drm_crtc_helper_funcs.atomic_enable * @crtc: The CRTC * @state: The atomic state * * The helper drm_crtc_vblank_atomic_enable() implements atomic_enable * of struct drm_crtc_helper_funcs for CRTCs the only need to enable VBLANKs. * * See also struct &drm_crtc_helper_funcs.atomic_enable. */ void drm_crtc_vblank_atomic_enable(struct drm_crtc *crtc, struct drm_atomic_state *state) { drm_crtc_vblank_on(crtc); } EXPORT_SYMBOL(drm_crtc_vblank_atomic_enable); /** * drm_crtc_vblank_atomic_disable - Implements struct &drm_crtc_helper_funcs.atomic_disable * @crtc: The CRTC * @state: The atomic state * * The helper drm_crtc_vblank_atomic_disable() implements atomic_disable * of struct drm_crtc_helper_funcs for CRTCs the only need to disable VBLANKs. * * See also struct &drm_crtc_funcs.atomic_disable. */ void drm_crtc_vblank_atomic_disable(struct drm_crtc *crtc, struct drm_atomic_state *state) { drm_crtc_vblank_off(crtc); } EXPORT_SYMBOL(drm_crtc_vblank_atomic_disable); /* * VBLANK timer */ /** * drm_crtc_vblank_helper_enable_vblank_timer - Implements struct &drm_crtc_funcs.enable_vblank * @crtc: The CRTC * * The helper drm_crtc_vblank_helper_enable_vblank_timer() implements * enable_vblank of struct drm_crtc_helper_funcs for CRTCs that require * a VBLANK timer. It sets up the timer on the first invocation. The * started timer expires after the current frame duration. See struct * &drm_vblank_crtc.framedur_ns. * * See also struct &drm_crtc_helper_funcs.enable_vblank. * * Returns: * 0 on success, or a negative errno code otherwise. */ int drm_crtc_vblank_helper_enable_vblank_timer(struct drm_crtc *crtc) { return drm_crtc_vblank_start_timer(crtc); } EXPORT_SYMBOL(drm_crtc_vblank_helper_enable_vblank_timer); /** * drm_crtc_vblank_helper_disable_vblank_timer - Implements struct &drm_crtc_funcs.disable_vblank * @crtc: The CRTC * * The helper drm_crtc_vblank_helper_disable_vblank_timer() implements * disable_vblank of struct drm_crtc_funcs for CRTCs that require a * VBLANK timer. * * See also struct &drm_crtc_helper_funcs.disable_vblank. */ void drm_crtc_vblank_helper_disable_vblank_timer(struct drm_crtc *crtc) { drm_crtc_vblank_cancel_timer(crtc); } EXPORT_SYMBOL(drm_crtc_vblank_helper_disable_vblank_timer); /** * drm_crtc_vblank_helper_get_vblank_timestamp_from_timer - * Implements struct &drm_crtc_funcs.get_vblank_timestamp * @crtc: The CRTC * @max_error: Maximum acceptable error * @vblank_time: Returns the next vblank timestamp * @in_vblank_irq: True is called from drm_crtc_handle_vblank() * * The helper drm_crtc_helper_get_vblank_timestamp_from_timer() implements * get_vblank_timestamp of struct drm_crtc_funcs for CRTCs that require a * VBLANK timer. It returns the timestamp according to the timer's expiry * time. * * See also struct &drm_crtc_funcs.get_vblank_timestamp. * * Returns: * True on success, or false otherwise. */ bool drm_crtc_vblank_helper_get_vblank_timestamp_from_timer(struct drm_crtc *crtc, int *max_error, ktime_t *vblank_time, bool in_vblank_irq) { drm_crtc_vblank_get_vblank_timeout(crtc, vblank_time); return true; } EXPORT_SYMBOL(drm_crtc_vblank_helper_get_vblank_timestamp_from_timer); |
| 16 65 17 20 17 6 7 12 15 6 4 4 15 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 | /* SPDX-License-Identifier: GPL-2.0 */ /* * Definitions for the UDP-Lite (RFC 3828) code. */ #ifndef _UDPLITE_H #define _UDPLITE_H #include <net/ip6_checksum.h> #include <net/udp.h> /* UDP-Lite socket options */ #define UDPLITE_SEND_CSCOV 10 /* sender partial coverage (as sent) */ #define UDPLITE_RECV_CSCOV 11 /* receiver partial coverage (threshold ) */ extern struct proto udplite_prot; extern struct udp_table udplite_table; /* * Checksum computation is all in software, hence simpler getfrag. */ static __inline__ int udplite_getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb) { struct msghdr *msg = from; return copy_from_iter_full(to, len, &msg->msg_iter) ? 0 : -EFAULT; } /* * Checksumming routines */ static inline int udplite_checksum_init(struct sk_buff *skb, struct udphdr *uh) { u16 cscov; /* In UDPv4 a zero checksum means that the transmitter generated no * checksum. UDP-Lite (like IPv6) mandates checksums, hence packets * with a zero checksum field are illegal. */ if (uh->check == 0) { net_dbg_ratelimited("UDPLite: zeroed checksum field\n"); return 1; } cscov = ntohs(uh->len); if (cscov == 0) /* Indicates that full coverage is required. */ ; else if (cscov < 8 || cscov > skb->len) { /* * Coverage length violates RFC 3828: log and discard silently. */ net_dbg_ratelimited("UDPLite: bad csum coverage %d/%d\n", cscov, skb->len); return 1; } else if (cscov < skb->len) { UDP_SKB_CB(skb)->partial_cov = 1; UDP_SKB_CB(skb)->cscov = cscov; if (skb->ip_summed == CHECKSUM_COMPLETE) skb->ip_summed = CHECKSUM_NONE; skb->csum_valid = 0; } return 0; } /* Fast-path computation of checksum. Socket may not be locked. */ static inline __wsum udplite_csum(struct sk_buff *skb) { const int off = skb_transport_offset(skb); const struct sock *sk = skb->sk; int len = skb->len - off; if (udp_test_bit(UDPLITE_SEND_CC, sk)) { u16 pcslen = READ_ONCE(udp_sk(sk)->pcslen); if (pcslen < len) { if (pcslen > 0) len = pcslen; udp_hdr(skb)->len = htons(pcslen); } } skb->ip_summed = CHECKSUM_NONE; /* no HW support for checksumming */ return skb_checksum(skb, off, len, 0); } void udplite4_register(void); #endif /* _UDPLITE_H */ |
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All rights reserved. * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries. */ #include "mac.h" #include <linux/export.h> #include <net/cfg80211.h> #include <net/mac80211.h> #include <linux/etherdevice.h> #include <linux/acpi.h> #include <linux/of.h> #include <linux/bitfield.h> #include <linux/random.h> #include "hif.h" #include "core.h" #include "debug.h" #include "wmi.h" #include "htt.h" #include "txrx.h" #include "testmode.h" #include "wmi-tlv.h" #include "wmi-ops.h" #include "wow.h" #include "leds.h" /*********/ /* Rates */ /*********/ static struct ieee80211_rate ath10k_rates[] = { { .bitrate = 10, .hw_value = ATH10K_HW_RATE_CCK_LP_1M }, { .bitrate = 20, .hw_value = ATH10K_HW_RATE_CCK_LP_2M, .hw_value_short = ATH10K_HW_RATE_CCK_SP_2M, .flags = IEEE80211_RATE_SHORT_PREAMBLE }, { .bitrate = 55, .hw_value = ATH10K_HW_RATE_CCK_LP_5_5M, .hw_value_short = ATH10K_HW_RATE_CCK_SP_5_5M, .flags = IEEE80211_RATE_SHORT_PREAMBLE }, { .bitrate = 110, .hw_value = ATH10K_HW_RATE_CCK_LP_11M, .hw_value_short = ATH10K_HW_RATE_CCK_SP_11M, .flags = IEEE80211_RATE_SHORT_PREAMBLE }, { .bitrate = 60, .hw_value = ATH10K_HW_RATE_OFDM_6M }, { .bitrate = 90, .hw_value = ATH10K_HW_RATE_OFDM_9M }, { .bitrate = 120, .hw_value = ATH10K_HW_RATE_OFDM_12M }, { .bitrate = 180, .hw_value = ATH10K_HW_RATE_OFDM_18M }, { .bitrate = 240, .hw_value = ATH10K_HW_RATE_OFDM_24M }, { .bitrate = 360, .hw_value = ATH10K_HW_RATE_OFDM_36M }, { .bitrate = 480, .hw_value = ATH10K_HW_RATE_OFDM_48M }, { .bitrate = 540, .hw_value = ATH10K_HW_RATE_OFDM_54M }, }; static struct ieee80211_rate ath10k_rates_rev2[] = { { .bitrate = 10, .hw_value = ATH10K_HW_RATE_REV2_CCK_LP_1M }, { .bitrate = 20, .hw_value = ATH10K_HW_RATE_REV2_CCK_LP_2M, .hw_value_short = ATH10K_HW_RATE_REV2_CCK_SP_2M, .flags = IEEE80211_RATE_SHORT_PREAMBLE }, { .bitrate = 55, .hw_value = ATH10K_HW_RATE_REV2_CCK_LP_5_5M, .hw_value_short = ATH10K_HW_RATE_REV2_CCK_SP_5_5M, .flags = IEEE80211_RATE_SHORT_PREAMBLE }, { .bitrate = 110, .hw_value = ATH10K_HW_RATE_REV2_CCK_LP_11M, .hw_value_short = ATH10K_HW_RATE_REV2_CCK_SP_11M, .flags = IEEE80211_RATE_SHORT_PREAMBLE }, { .bitrate = 60, .hw_value = ATH10K_HW_RATE_OFDM_6M }, { .bitrate = 90, .hw_value = ATH10K_HW_RATE_OFDM_9M }, { .bitrate = 120, .hw_value = ATH10K_HW_RATE_OFDM_12M }, { .bitrate = 180, .hw_value = ATH10K_HW_RATE_OFDM_18M }, { .bitrate = 240, .hw_value = ATH10K_HW_RATE_OFDM_24M }, { .bitrate = 360, .hw_value = ATH10K_HW_RATE_OFDM_36M }, { .bitrate = 480, .hw_value = ATH10K_HW_RATE_OFDM_48M }, { .bitrate = 540, .hw_value = ATH10K_HW_RATE_OFDM_54M }, }; static const struct cfg80211_sar_freq_ranges ath10k_sar_freq_ranges[] = { {.start_freq = 2402, .end_freq = 2494 }, {.start_freq = 5170, .end_freq = 5875 }, }; static const struct cfg80211_sar_capa ath10k_sar_capa = { .type = NL80211_SAR_TYPE_POWER, .num_freq_ranges = (ARRAY_SIZE(ath10k_sar_freq_ranges)), .freq_ranges = &ath10k_sar_freq_ranges[0], }; #define ATH10K_MAC_FIRST_OFDM_RATE_IDX 4 #define ath10k_a_rates (ath10k_rates + ATH10K_MAC_FIRST_OFDM_RATE_IDX) #define ath10k_a_rates_size (ARRAY_SIZE(ath10k_rates) - \ ATH10K_MAC_FIRST_OFDM_RATE_IDX) #define ath10k_g_rates (ath10k_rates + 0) #define ath10k_g_rates_size (ARRAY_SIZE(ath10k_rates)) #define ath10k_g_rates_rev2 (ath10k_rates_rev2 + 0) #define ath10k_g_rates_rev2_size (ARRAY_SIZE(ath10k_rates_rev2)) #define ath10k_wmi_legacy_rates ath10k_rates static bool ath10k_mac_bitrate_is_cck(int bitrate) { switch (bitrate) { case 10: case 20: case 55: case 110: return true; } return false; } static u8 ath10k_mac_bitrate_to_rate(int bitrate) { return DIV_ROUND_UP(bitrate, 5) | (ath10k_mac_bitrate_is_cck(bitrate) ? BIT(7) : 0); } u8 ath10k_mac_hw_rate_to_idx(const struct ieee80211_supported_band *sband, u8 hw_rate, bool cck) { const struct ieee80211_rate *rate; int i; for (i = 0; i < sband->n_bitrates; i++) { rate = &sband->bitrates[i]; if (ath10k_mac_bitrate_is_cck(rate->bitrate) != cck) continue; if (rate->hw_value == hw_rate) return i; else if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE && rate->hw_value_short == hw_rate) return i; } return 0; } u8 ath10k_mac_bitrate_to_idx(const struct ieee80211_supported_band *sband, u32 bitrate) { int i; for (i = 0; i < sband->n_bitrates; i++) if (sband->bitrates[i].bitrate == bitrate) return i; return 0; } static int ath10k_mac_get_rate_hw_value(int bitrate) { int i; u8 hw_value_prefix = 0; if (ath10k_mac_bitrate_is_cck(bitrate)) hw_value_prefix = WMI_RATE_PREAMBLE_CCK << 6; for (i = 0; i < ARRAY_SIZE(ath10k_rates); i++) { if (ath10k_rates[i].bitrate == bitrate) return hw_value_prefix | ath10k_rates[i].hw_value; } return -EINVAL; } static int ath10k_mac_get_max_vht_mcs_map(u16 mcs_map, int nss) { switch ((mcs_map >> (2 * nss)) & 0x3) { case IEEE80211_VHT_MCS_SUPPORT_0_7: return BIT(8) - 1; case IEEE80211_VHT_MCS_SUPPORT_0_8: return BIT(9) - 1; case IEEE80211_VHT_MCS_SUPPORT_0_9: return BIT(10) - 1; } return 0; } static u32 ath10k_mac_max_ht_nss(const u8 ht_mcs_mask[IEEE80211_HT_MCS_MASK_LEN]) { int nss; for (nss = IEEE80211_HT_MCS_MASK_LEN - 1; nss >= 0; nss--) if (ht_mcs_mask[nss]) return nss + 1; return 1; } static u32 ath10k_mac_max_vht_nss(const u16 vht_mcs_mask[NL80211_VHT_NSS_MAX]) { int nss; for (nss = NL80211_VHT_NSS_MAX - 1; nss >= 0; nss--) if (vht_mcs_mask[nss]) return nss + 1; return 1; } int ath10k_mac_ext_resource_config(struct ath10k *ar, u32 val) { enum wmi_host_platform_type platform_type; int ret; if (test_bit(WMI_SERVICE_TX_MODE_DYNAMIC, ar->wmi.svc_map)) platform_type = WMI_HOST_PLATFORM_LOW_PERF; else platform_type = WMI_HOST_PLATFORM_HIGH_PERF; ret = ath10k_wmi_ext_resource_config(ar, platform_type, val); if (ret && ret != -EOPNOTSUPP) { ath10k_warn(ar, "failed to configure ext resource: %d\n", ret); return ret; } return 0; } /**********/ /* Crypto */ /**********/ static int ath10k_send_key(struct ath10k_vif *arvif, struct ieee80211_key_conf *key, enum set_key_cmd cmd, const u8 *macaddr, u32 flags) { struct ath10k *ar = arvif->ar; struct wmi_vdev_install_key_arg arg = { .vdev_id = arvif->vdev_id, .key_idx = key->keyidx, .key_len = key->keylen, .key_data = key->key, .key_flags = flags, .macaddr = macaddr, }; lockdep_assert_held(&arvif->ar->conf_mutex); switch (key->cipher) { case WLAN_CIPHER_SUITE_CCMP: arg.key_cipher = ar->wmi_key_cipher[WMI_CIPHER_AES_CCM]; key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV_MGMT; break; case WLAN_CIPHER_SUITE_TKIP: arg.key_cipher = ar->wmi_key_cipher[WMI_CIPHER_TKIP]; arg.key_txmic_len = 8; arg.key_rxmic_len = 8; break; case WLAN_CIPHER_SUITE_WEP40: case WLAN_CIPHER_SUITE_WEP104: arg.key_cipher = ar->wmi_key_cipher[WMI_CIPHER_WEP]; break; case WLAN_CIPHER_SUITE_CCMP_256: arg.key_cipher = ar->wmi_key_cipher[WMI_CIPHER_AES_CCM]; break; case WLAN_CIPHER_SUITE_GCMP: case WLAN_CIPHER_SUITE_GCMP_256: arg.key_cipher = ar->wmi_key_cipher[WMI_CIPHER_AES_GCM]; key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV_MGMT; break; case WLAN_CIPHER_SUITE_BIP_GMAC_128: case WLAN_CIPHER_SUITE_BIP_GMAC_256: case WLAN_CIPHER_SUITE_BIP_CMAC_256: case WLAN_CIPHER_SUITE_AES_CMAC: WARN_ON(1); return -EINVAL; default: ath10k_warn(ar, "cipher %d is not supported\n", key->cipher); return -EOPNOTSUPP; } if (test_bit(ATH10K_FLAG_RAW_MODE, &ar->dev_flags)) key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; if (cmd == DISABLE_KEY) { if (flags & WMI_KEY_GROUP) { /* Not all hardware handles group-key deletion operation * correctly. Replace the key with a junk value to invalidate it. */ get_random_bytes(key->key, key->keylen); } else { arg.key_cipher = ar->wmi_key_cipher[WMI_CIPHER_NONE]; arg.key_data = NULL; } } return ath10k_wmi_vdev_install_key(arvif->ar, &arg); } static int ath10k_install_key(struct ath10k_vif *arvif, struct ieee80211_key_conf *key, enum set_key_cmd cmd, const u8 *macaddr, u32 flags) { struct ath10k *ar = arvif->ar; int ret; unsigned long time_left; lockdep_assert_held(&ar->conf_mutex); reinit_completion(&ar->install_key_done); if (arvif->nohwcrypt) return 1; ret = ath10k_send_key(arvif, key, cmd, macaddr, flags); if (ret) return ret; time_left = wait_for_completion_timeout(&ar->install_key_done, 3 * HZ); if (time_left == 0) return -ETIMEDOUT; return 0; } static int ath10k_install_peer_wep_keys(struct ath10k_vif *arvif, const u8 *addr) { struct ath10k *ar = arvif->ar; struct ath10k_peer *peer; int ret; int i; u32 flags; lockdep_assert_held(&ar->conf_mutex); if (WARN_ON(arvif->vif->type != NL80211_IFTYPE_AP && arvif->vif->type != NL80211_IFTYPE_ADHOC && arvif->vif->type != NL80211_IFTYPE_MESH_POINT)) return -EINVAL; spin_lock_bh(&ar->data_lock); peer = ath10k_peer_find(ar, arvif->vdev_id, addr); spin_unlock_bh(&ar->data_lock); if (!peer) return -ENOENT; for (i = 0; i < ARRAY_SIZE(arvif->wep_keys); i++) { if (arvif->wep_keys[i] == NULL) continue; switch (arvif->vif->type) { case NL80211_IFTYPE_AP: flags = WMI_KEY_PAIRWISE; if (arvif->def_wep_key_idx == i) flags |= WMI_KEY_TX_USAGE; ret = ath10k_install_key(arvif, arvif->wep_keys[i], SET_KEY, addr, flags); if (ret < 0) return ret; break; case NL80211_IFTYPE_ADHOC: ret = ath10k_install_key(arvif, arvif->wep_keys[i], SET_KEY, addr, WMI_KEY_PAIRWISE); if (ret < 0) return ret; ret = ath10k_install_key(arvif, arvif->wep_keys[i], SET_KEY, addr, WMI_KEY_GROUP); if (ret < 0) return ret; break; default: WARN_ON(1); return -EINVAL; } spin_lock_bh(&ar->data_lock); peer->keys[i] = arvif->wep_keys[i]; spin_unlock_bh(&ar->data_lock); } /* In some cases (notably with static WEP IBSS with multiple keys) * multicast Tx becomes broken. Both pairwise and groupwise keys are * installed already. Using WMI_KEY_TX_USAGE in different combinations * didn't seem help. Using def_keyid vdev parameter seems to be * effective so use that. * * FIXME: Revisit. Perhaps this can be done in a less hacky way. */ if (arvif->vif->type != NL80211_IFTYPE_ADHOC) return 0; if (arvif->def_wep_key_idx == -1) return 0; ret = ath10k_wmi_vdev_set_param(arvif->ar, arvif->vdev_id, arvif->ar->wmi.vdev_param->def_keyid, arvif->def_wep_key_idx); if (ret) { ath10k_warn(ar, "failed to re-set def wpa key idxon vdev %i: %d\n", arvif->vdev_id, ret); return ret; } return 0; } static int ath10k_clear_peer_keys(struct ath10k_vif *arvif, const u8 *addr) { struct ath10k *ar = arvif->ar; struct ath10k_peer *peer; int first_errno = 0; int ret; int i; u32 flags = 0; lockdep_assert_held(&ar->conf_mutex); spin_lock_bh(&ar->data_lock); peer = ath10k_peer_find(ar, arvif->vdev_id, addr); spin_unlock_bh(&ar->data_lock); if (!peer) return -ENOENT; for (i = 0; i < ARRAY_SIZE(peer->keys); i++) { if (peer->keys[i] == NULL) continue; /* key flags are not required to delete the key */ ret = ath10k_install_key(arvif, peer->keys[i], DISABLE_KEY, addr, flags); if (ret < 0 && first_errno == 0) first_errno = ret; if (ret < 0) ath10k_warn(ar, "failed to remove peer wep key %d: %d\n", i, ret); spin_lock_bh(&ar->data_lock); peer->keys[i] = NULL; spin_unlock_bh(&ar->data_lock); } return first_errno; } bool ath10k_mac_is_peer_wep_key_set(struct ath10k *ar, const u8 *addr, u8 keyidx) { struct ath10k_peer *peer; int i; lockdep_assert_held(&ar->data_lock); /* We don't know which vdev this peer belongs to, * since WMI doesn't give us that information. * * FIXME: multi-bss needs to be handled. */ peer = ath10k_peer_find(ar, 0, addr); if (!peer) return false; for (i = 0; i < ARRAY_SIZE(peer->keys); i++) { if (peer->keys[i] && peer->keys[i]->keyidx == keyidx) return true; } return false; } static int ath10k_clear_vdev_key(struct ath10k_vif *arvif, struct ieee80211_key_conf *key) { struct ath10k *ar = arvif->ar; struct ath10k_peer *peer; u8 addr[ETH_ALEN]; int first_errno = 0; int ret; int i; u32 flags = 0; lockdep_assert_held(&ar->conf_mutex); for (;;) { /* since ath10k_install_key we can't hold data_lock all the * time, so we try to remove the keys incrementally */ spin_lock_bh(&ar->data_lock); i = 0; list_for_each_entry(peer, &ar->peers, list) { for (i = 0; i < ARRAY_SIZE(peer->keys); i++) { if (peer->keys[i] == key) { ether_addr_copy(addr, peer->addr); peer->keys[i] = NULL; break; } } if (i < ARRAY_SIZE(peer->keys)) break; } spin_unlock_bh(&ar->data_lock); if (i == ARRAY_SIZE(peer->keys)) break; /* key flags are not required to delete the key */ ret = ath10k_install_key(arvif, key, DISABLE_KEY, addr, flags); if (ret < 0 && first_errno == 0) first_errno = ret; if (ret) ath10k_warn(ar, "failed to remove key for %pM: %d\n", addr, ret); } return first_errno; } static int ath10k_mac_vif_update_wep_key(struct ath10k_vif *arvif, struct ieee80211_key_conf *key) { struct ath10k *ar = arvif->ar; struct ath10k_peer *peer; int ret; lockdep_assert_held(&ar->conf_mutex); list_for_each_entry(peer, &ar->peers, list) { if (ether_addr_equal(peer->addr, arvif->vif->addr)) continue; if (ether_addr_equal(peer->addr, arvif->bssid)) continue; if (peer->keys[key->keyidx] == key) continue; ath10k_dbg(ar, ATH10K_DBG_MAC, "mac vif vdev %i update key %i needs update\n", arvif->vdev_id, key->keyidx); ret = ath10k_install_peer_wep_keys(arvif, peer->addr); if (ret) { ath10k_warn(ar, "failed to update wep keys on vdev %i for peer %pM: %d\n", arvif->vdev_id, peer->addr, ret); return ret; } } return 0; } /*********************/ /* General utilities */ /*********************/ static inline enum wmi_phy_mode chan_to_phymode(const struct cfg80211_chan_def *chandef) { enum wmi_phy_mode phymode = MODE_UNKNOWN; switch (chandef->chan->band) { case NL80211_BAND_2GHZ: switch (chandef->width) { case NL80211_CHAN_WIDTH_20_NOHT: if (chandef->chan->flags & IEEE80211_CHAN_NO_OFDM) phymode = MODE_11B; else phymode = MODE_11G; break; case NL80211_CHAN_WIDTH_20: phymode = MODE_11NG_HT20; break; case NL80211_CHAN_WIDTH_40: phymode = MODE_11NG_HT40; break; default: phymode = MODE_UNKNOWN; break; } break; case NL80211_BAND_5GHZ: switch (chandef->width) { case NL80211_CHAN_WIDTH_20_NOHT: phymode = MODE_11A; break; case NL80211_CHAN_WIDTH_20: phymode = MODE_11NA_HT20; break; case NL80211_CHAN_WIDTH_40: phymode = MODE_11NA_HT40; break; case NL80211_CHAN_WIDTH_80: phymode = MODE_11AC_VHT80; break; case NL80211_CHAN_WIDTH_160: phymode = MODE_11AC_VHT160; break; case NL80211_CHAN_WIDTH_80P80: phymode = MODE_11AC_VHT80_80; break; default: phymode = MODE_UNKNOWN; break; } break; default: break; } WARN_ON(phymode == MODE_UNKNOWN); return phymode; } static u8 ath10k_parse_mpdudensity(u8 mpdudensity) { /* * 802.11n D2.0 defined values for "Minimum MPDU Start Spacing": * 0 for no restriction * 1 for 1/4 us * 2 for 1/2 us * 3 for 1 us * 4 for 2 us * 5 for 4 us * 6 for 8 us * 7 for 16 us */ switch (mpdudensity) { case 0: return 0; case 1: case 2: case 3: /* Our lower layer calculations limit our precision to * 1 microsecond */ return 1; case 4: return 2; case 5: return 4; case 6: return 8; case 7: return 16; default: return 0; } } int ath10k_mac_vif_chan(struct ieee80211_vif *vif, struct cfg80211_chan_def *def) { struct ieee80211_chanctx_conf *conf; rcu_read_lock(); conf = rcu_dereference(vif->bss_conf.chanctx_conf); if (!conf) { rcu_read_unlock(); return -ENOENT; } *def = conf->def; rcu_read_unlock(); return 0; } static void ath10k_mac_num_chanctxs_iter(struct ieee80211_hw *hw, struct ieee80211_chanctx_conf *conf, void *data) { int *num = data; (*num)++; } static int ath10k_mac_num_chanctxs(struct ath10k *ar) { int num = 0; ieee80211_iter_chan_contexts_atomic(ar->hw, ath10k_mac_num_chanctxs_iter, &num); return num; } static void ath10k_mac_get_any_chandef_iter(struct ieee80211_hw *hw, struct ieee80211_chanctx_conf *conf, void *data) { struct cfg80211_chan_def **def = data; *def = &conf->def; } static void ath10k_wait_for_peer_delete_done(struct ath10k *ar, u32 vdev_id, const u8 *addr) { unsigned long time_left; int ret; if (test_bit(WMI_SERVICE_SYNC_DELETE_CMDS, ar->wmi.svc_map)) { ret = ath10k_wait_for_peer_deleted(ar, vdev_id, addr); if (ret) { ath10k_warn(ar, "failed wait for peer deleted"); return; } time_left = wait_for_completion_timeout(&ar->peer_delete_done, 5 * HZ); if (!time_left) ath10k_warn(ar, "Timeout in receiving peer delete response\n"); } } static int ath10k_peer_create(struct ath10k *ar, struct ieee80211_vif *vif, struct ieee80211_sta *sta, u32 vdev_id, const u8 *addr, enum wmi_peer_type peer_type) { struct ath10k_peer *peer; int ret; lockdep_assert_held(&ar->conf_mutex); /* Each vdev consumes a peer entry as well. */ if (ar->num_peers + list_count_nodes(&ar->arvifs) >= ar->max_num_peers) return -ENOBUFS; ret = ath10k_wmi_peer_create(ar, vdev_id, addr, peer_type); if (ret) { ath10k_warn(ar, "failed to create wmi peer %pM on vdev %i: %i\n", addr, vdev_id, ret); return ret; } ret = ath10k_wait_for_peer_created(ar, vdev_id, addr); if (ret) { ath10k_warn(ar, "failed to wait for created wmi peer %pM on vdev %i: %i\n", addr, vdev_id, ret); return ret; } spin_lock_bh(&ar->data_lock); peer = ath10k_peer_find(ar, vdev_id, addr); if (!peer) { spin_unlock_bh(&ar->data_lock); ath10k_warn(ar, "failed to find peer %pM on vdev %i after creation\n", addr, vdev_id); ath10k_wait_for_peer_delete_done(ar, vdev_id, addr); return -ENOENT; } peer->vif = vif; peer->sta = sta; spin_unlock_bh(&ar->data_lock); ar->num_peers++; return 0; } static int ath10k_mac_set_kickout(struct ath10k_vif *arvif) { struct ath10k *ar = arvif->ar; u32 param; int ret; param = ar->wmi.pdev_param->sta_kickout_th; ret = ath10k_wmi_pdev_set_param(ar, param, ATH10K_KICKOUT_THRESHOLD); if (ret) { ath10k_warn(ar, "failed to set kickout threshold on vdev %i: %d\n", arvif->vdev_id, ret); return ret; } param = ar->wmi.vdev_param->ap_keepalive_min_idle_inactive_time_secs; ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, param, ATH10K_KEEPALIVE_MIN_IDLE); if (ret) { ath10k_warn(ar, "failed to set keepalive minimum idle time on vdev %i: %d\n", arvif->vdev_id, ret); return ret; } param = ar->wmi.vdev_param->ap_keepalive_max_idle_inactive_time_secs; ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, param, ATH10K_KEEPALIVE_MAX_IDLE); if (ret) { ath10k_warn(ar, "failed to set keepalive maximum idle time on vdev %i: %d\n", arvif->vdev_id, ret); return ret; } param = ar->wmi.vdev_param->ap_keepalive_max_unresponsive_time_secs; ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, param, ATH10K_KEEPALIVE_MAX_UNRESPONSIVE); if (ret) { ath10k_warn(ar, "failed to set keepalive maximum unresponsive time on vdev %i: %d\n", arvif->vdev_id, ret); return ret; } return 0; } static int ath10k_mac_set_rts(struct ath10k_vif *arvif, u32 value) { struct ath10k *ar = arvif->ar; u32 vdev_param; vdev_param = ar->wmi.vdev_param->rts_threshold; return ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, vdev_param, value); } static int ath10k_peer_delete(struct ath10k *ar, u32 vdev_id, const u8 *addr) { int ret; lockdep_assert_held(&ar->conf_mutex); ret = ath10k_wmi_peer_delete(ar, vdev_id, addr); if (ret) return ret; ret = ath10k_wait_for_peer_deleted(ar, vdev_id, addr); if (ret) return ret; if (test_bit(WMI_SERVICE_SYNC_DELETE_CMDS, ar->wmi.svc_map)) { unsigned long time_left; time_left = wait_for_completion_timeout (&ar->peer_delete_done, 5 * HZ); if (!time_left) { ath10k_warn(ar, "Timeout in receiving peer delete response\n"); return -ETIMEDOUT; } } ar->num_peers--; return 0; } static void ath10k_peer_map_cleanup(struct ath10k *ar, struct ath10k_peer *peer) { int peer_id, i; lockdep_assert_held(&ar->conf_mutex); for_each_set_bit(peer_id, peer->peer_ids, ATH10K_MAX_NUM_PEER_IDS) { ar->peer_map[peer_id] = NULL; } /* Double check that peer is properly un-referenced from * the peer_map */ for (i = 0; i < ARRAY_SIZE(ar->peer_map); i++) { if (ar->peer_map[i] == peer) { ath10k_warn(ar, "removing stale peer_map entry for %pM (ptr %p idx %d)\n", peer->addr, peer, i); ar->peer_map[i] = NULL; } } list_del(&peer->list); kfree(peer); ar->num_peers--; } static void ath10k_peer_cleanup(struct ath10k *ar, u32 vdev_id) { struct ath10k_peer *peer, *tmp; lockdep_assert_held(&ar->conf_mutex); spin_lock_bh(&ar->data_lock); list_for_each_entry_safe(peer, tmp, &ar->peers, list) { if (peer->vdev_id != vdev_id) continue; ath10k_warn(ar, "removing stale peer %pM from vdev_id %d\n", peer->addr, vdev_id); ath10k_peer_map_cleanup(ar, peer); } spin_unlock_bh(&ar->data_lock); } static void ath10k_peer_cleanup_all(struct ath10k *ar) { struct ath10k_peer *peer, *tmp; int i; lockdep_assert_held(&ar->conf_mutex); spin_lock_bh(&ar->data_lock); list_for_each_entry_safe(peer, tmp, &ar->peers, list) { list_del(&peer->list); kfree(peer); } for (i = 0; i < ARRAY_SIZE(ar->peer_map); i++) ar->peer_map[i] = NULL; spin_unlock_bh(&ar->data_lock); ar->num_peers = 0; ar->num_stations = 0; } static int ath10k_mac_tdls_peer_update(struct ath10k *ar, u32 vdev_id, struct ieee80211_sta *sta, enum wmi_tdls_peer_state state) { int ret; struct wmi_tdls_peer_update_cmd_arg arg = {}; struct wmi_tdls_peer_capab_arg cap = {}; struct wmi_channel_arg chan_arg = {}; lockdep_assert_held(&ar->conf_mutex); arg.vdev_id = vdev_id; arg.peer_state = state; ether_addr_copy(arg.addr, sta->addr); cap.peer_max_sp = sta->max_sp; cap.peer_uapsd_queues = sta->uapsd_queues; if (state == WMI_TDLS_PEER_STATE_CONNECTED && !sta->tdls_initiator) cap.is_peer_responder = 1; ret = ath10k_wmi_tdls_peer_update(ar, &arg, &cap, &chan_arg); if (ret) { ath10k_warn(ar, "failed to update tdls peer %pM on vdev %i: %i\n", arg.addr, vdev_id, ret); return ret; } return 0; } /************************/ /* Interface management */ /************************/ void ath10k_mac_vif_beacon_free(struct ath10k_vif *arvif) { struct ath10k *ar = arvif->ar; lockdep_assert_held(&ar->data_lock); if (!arvif->beacon) return; if (!arvif->beacon_buf) dma_unmap_single(ar->dev, ATH10K_SKB_CB(arvif->beacon)->paddr, arvif->beacon->len, DMA_TO_DEVICE); if (WARN_ON(arvif->beacon_state != ATH10K_BEACON_SCHEDULED && arvif->beacon_state != ATH10K_BEACON_SENT)) return; dev_kfree_skb_any(arvif->beacon); arvif->beacon = NULL; arvif->beacon_state = ATH10K_BEACON_SCHEDULED; } static void ath10k_mac_vif_beacon_cleanup(struct ath10k_vif *arvif) { struct ath10k *ar = arvif->ar; lockdep_assert_held(&ar->data_lock); ath10k_mac_vif_beacon_free(arvif); if (arvif->beacon_buf) { if (ar->bus_param.dev_type == ATH10K_DEV_TYPE_HL) kfree(arvif->beacon_buf); else dma_free_coherent(ar->dev, IEEE80211_MAX_FRAME_LEN, arvif->beacon_buf, arvif->beacon_paddr); arvif->beacon_buf = NULL; } } static inline int ath10k_vdev_setup_sync(struct ath10k *ar) { unsigned long time_left; lockdep_assert_held(&ar->conf_mutex); if (test_bit(ATH10K_FLAG_CRASH_FLUSH, &ar->dev_flags)) return -ESHUTDOWN; time_left = wait_for_completion_timeout(&ar->vdev_setup_done, ATH10K_VDEV_SETUP_TIMEOUT_HZ); if (time_left == 0) return -ETIMEDOUT; return ar->last_wmi_vdev_start_status; } static inline int ath10k_vdev_delete_sync(struct ath10k *ar) { unsigned long time_left; lockdep_assert_held(&ar->conf_mutex); if (!test_bit(WMI_SERVICE_SYNC_DELETE_CMDS, ar->wmi.svc_map)) return 0; if (test_bit(ATH10K_FLAG_CRASH_FLUSH, &ar->dev_flags)) return -ESHUTDOWN; time_left = wait_for_completion_timeout(&ar->vdev_delete_done, ATH10K_VDEV_DELETE_TIMEOUT_HZ); if (time_left == 0) return -ETIMEDOUT; return 0; } static int ath10k_monitor_vdev_start(struct ath10k *ar, int vdev_id) { struct cfg80211_chan_def *chandef = NULL; struct ieee80211_channel *channel = NULL; struct wmi_vdev_start_request_arg arg = {}; int ret = 0; lockdep_assert_held(&ar->conf_mutex); ieee80211_iter_chan_contexts_atomic(ar->hw, ath10k_mac_get_any_chandef_iter, &chandef); if (WARN_ON_ONCE(!chandef)) return -ENOENT; channel = chandef->chan; arg.vdev_id = vdev_id; arg.channel.freq = channel->center_freq; arg.channel.band_center_freq1 = chandef->center_freq1; arg.channel.band_center_freq2 = chandef->center_freq2; /* TODO setup this dynamically, what in case we * don't have any vifs? */ arg.channel.mode = chan_to_phymode(chandef); arg.channel.chan_radar = !!(channel->flags & IEEE80211_CHAN_RADAR); arg.channel.min_power = 0; arg.channel.max_power = channel->max_power * 2; arg.channel.max_reg_power = channel->max_reg_power * 2; arg.channel.max_antenna_gain = channel->max_antenna_gain; reinit_completion(&ar->vdev_setup_done); reinit_completion(&ar->vdev_delete_done); ret = ath10k_wmi_vdev_start(ar, &arg); if (ret) { ath10k_warn(ar, "failed to request monitor vdev %i start: %d\n", vdev_id, ret); return ret; } ret = ath10k_vdev_setup_sync(ar); if (ret) { ath10k_warn(ar, "failed to synchronize setup for monitor vdev %i start: %d\n", vdev_id, ret); return ret; } ret = ath10k_wmi_vdev_up(ar, vdev_id, 0, ar->mac_addr); if (ret) { ath10k_warn(ar, "failed to put up monitor vdev %i: %d\n", vdev_id, ret); goto vdev_stop; } ar->monitor_vdev_id = vdev_id; ath10k_dbg(ar, ATH10K_DBG_MAC, "mac monitor vdev %i started\n", ar->monitor_vdev_id); return 0; vdev_stop: ret = ath10k_wmi_vdev_stop(ar, ar->monitor_vdev_id); if (ret) ath10k_warn(ar, "failed to stop monitor vdev %i after start failure: %d\n", ar->monitor_vdev_id, ret); return ret; } static int ath10k_monitor_vdev_stop(struct ath10k *ar) { int ret = 0; lockdep_assert_held(&ar->conf_mutex); ret = ath10k_wmi_vdev_down(ar, ar->monitor_vdev_id); if (ret) ath10k_warn(ar, "failed to put down monitor vdev %i: %d\n", ar->monitor_vdev_id, ret); reinit_completion(&ar->vdev_setup_done); reinit_completion(&ar->vdev_delete_done); ret = ath10k_wmi_vdev_stop(ar, ar->monitor_vdev_id); if (ret) ath10k_warn(ar, "failed to request monitor vdev %i stop: %d\n", ar->monitor_vdev_id, ret); ret = ath10k_vdev_setup_sync(ar); if (ret) ath10k_warn(ar, "failed to synchronize monitor vdev %i stop: %d\n", ar->monitor_vdev_id, ret); ath10k_dbg(ar, ATH10K_DBG_MAC, "mac monitor vdev %i stopped\n", ar->monitor_vdev_id); return ret; } static int ath10k_monitor_vdev_create(struct ath10k *ar) { int bit, ret = 0; lockdep_assert_held(&ar->conf_mutex); if (ar->free_vdev_map == 0) { ath10k_warn(ar, "failed to find free vdev id for monitor vdev\n"); return -ENOMEM; } bit = __ffs64(ar->free_vdev_map); ar->monitor_vdev_id = bit; ret = ath10k_wmi_vdev_create(ar, ar->monitor_vdev_id, WMI_VDEV_TYPE_MONITOR, 0, ar->mac_addr); if (ret) { ath10k_warn(ar, "failed to request monitor vdev %i creation: %d\n", ar->monitor_vdev_id, ret); return ret; } ar->free_vdev_map &= ~(1LL << ar->monitor_vdev_id); ath10k_dbg(ar, ATH10K_DBG_MAC, "mac monitor vdev %d created\n", ar->monitor_vdev_id); return 0; } static int ath10k_monitor_vdev_delete(struct ath10k *ar) { int ret = 0; lockdep_assert_held(&ar->conf_mutex); ret = ath10k_wmi_vdev_delete(ar, ar->monitor_vdev_id); if (ret) { ath10k_warn(ar, "failed to request wmi monitor vdev %i removal: %d\n", ar->monitor_vdev_id, ret); return ret; } ar->free_vdev_map |= 1LL << ar->monitor_vdev_id; ath10k_dbg(ar, ATH10K_DBG_MAC, "mac monitor vdev %d deleted\n", ar->monitor_vdev_id); return ret; } static int ath10k_monitor_start(struct ath10k *ar) { int ret; lockdep_assert_held(&ar->conf_mutex); ret = ath10k_monitor_vdev_create(ar); if (ret) { ath10k_warn(ar, "failed to create monitor vdev: %d\n", ret); return ret; } ret = ath10k_monitor_vdev_start(ar, ar->monitor_vdev_id); if (ret) { ath10k_warn(ar, "failed to start monitor vdev: %d\n", ret); ath10k_monitor_vdev_delete(ar); return ret; } ar->monitor_started = true; ath10k_dbg(ar, ATH10K_DBG_MAC, "mac monitor started\n"); return 0; } static int ath10k_monitor_stop(struct ath10k *ar) { int ret; lockdep_assert_held(&ar->conf_mutex); ret = ath10k_monitor_vdev_stop(ar); if (ret) { ath10k_warn(ar, "failed to stop monitor vdev: %d\n", ret); return ret; } ret = ath10k_monitor_vdev_delete(ar); if (ret) { ath10k_warn(ar, "failed to delete monitor vdev: %d\n", ret); return ret; } ar->monitor_started = false; ath10k_dbg(ar, ATH10K_DBG_MAC, "mac monitor stopped\n"); return 0; } static bool ath10k_mac_monitor_vdev_is_needed(struct ath10k *ar) { int num_ctx; /* At least one chanctx is required to derive a channel to start * monitor vdev on. */ num_ctx = ath10k_mac_num_chanctxs(ar); if (num_ctx == 0) return false; /* If there's already an existing special monitor interface then don't * bother creating another monitor vdev. */ if (ar->monitor_arvif) return false; return ar->monitor || (!test_bit(ATH10K_FW_FEATURE_ALLOWS_MESH_BCAST, ar->running_fw->fw_file.fw_features) && (ar->filter_flags & (FIF_OTHER_BSS | FIF_MCAST_ACTION))) || test_bit(ATH10K_CAC_RUNNING, &ar->dev_flags); } static bool ath10k_mac_monitor_vdev_is_allowed(struct ath10k *ar) { int num_ctx; num_ctx = ath10k_mac_num_chanctxs(ar); /* FIXME: Current interface combinations and cfg80211/mac80211 code * shouldn't allow this but make sure to prevent handling the following * case anyway since multi-channel DFS hasn't been tested at all. */ if (test_bit(ATH10K_CAC_RUNNING, &ar->dev_flags) && num_ctx > 1) return false; return true; } static int ath10k_monitor_recalc(struct ath10k *ar) { bool needed; bool allowed; int ret; lockdep_assert_held(&ar->conf_mutex); needed = ath10k_mac_monitor_vdev_is_needed(ar); allowed = ath10k_mac_monitor_vdev_is_allowed(ar); ath10k_dbg(ar, ATH10K_DBG_MAC, "mac monitor recalc started? %d needed? %d allowed? %d\n", ar->monitor_started, needed, allowed); if (WARN_ON(needed && !allowed)) { if (ar->monitor_started) { ath10k_dbg(ar, ATH10K_DBG_MAC, "mac monitor stopping disallowed monitor\n"); ret = ath10k_monitor_stop(ar); if (ret) ath10k_warn(ar, "failed to stop disallowed monitor: %d\n", ret); /* not serious */ } return -EPERM; } if (needed == ar->monitor_started) return 0; if (needed) return ath10k_monitor_start(ar); else return ath10k_monitor_stop(ar); } static bool ath10k_mac_can_set_cts_prot(struct ath10k_vif *arvif) { struct ath10k *ar = arvif->ar; lockdep_assert_held(&ar->conf_mutex); if (!arvif->is_started) { ath10k_dbg(ar, ATH10K_DBG_MAC, "defer cts setup, vdev is not ready yet\n"); return false; } return true; } static int ath10k_mac_set_cts_prot(struct ath10k_vif *arvif) { struct ath10k *ar = arvif->ar; u32 vdev_param; lockdep_assert_held(&ar->conf_mutex); vdev_param = ar->wmi.vdev_param->protection_mode; ath10k_dbg(ar, ATH10K_DBG_MAC, "mac vdev %d cts_protection %d\n", arvif->vdev_id, arvif->use_cts_prot); return ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, vdev_param, arvif->use_cts_prot ? 1 : 0); } static int ath10k_recalc_rtscts_prot(struct ath10k_vif *arvif) { struct ath10k *ar = arvif->ar; u32 vdev_param, rts_cts = 0; lockdep_assert_held(&ar->conf_mutex); vdev_param = ar->wmi.vdev_param->enable_rtscts; rts_cts |= SM(WMI_RTSCTS_ENABLED, WMI_RTSCTS_SET); if (arvif->num_legacy_stations > 0) rts_cts |= SM(WMI_RTSCTS_ACROSS_SW_RETRIES, WMI_RTSCTS_PROFILE); else rts_cts |= SM(WMI_RTSCTS_FOR_SECOND_RATESERIES, WMI_RTSCTS_PROFILE); ath10k_dbg(ar, ATH10K_DBG_MAC, "mac vdev %d recalc rts/cts prot %d\n", arvif->vdev_id, rts_cts); return ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, vdev_param, rts_cts); } static int ath10k_start_cac(struct ath10k *ar) { int ret; lockdep_assert_held(&ar->conf_mutex); set_bit(ATH10K_CAC_RUNNING, &ar->dev_flags); ret = ath10k_monitor_recalc(ar); if (ret) { ath10k_warn(ar, "failed to start monitor (cac): %d\n", ret); clear_bit(ATH10K_CAC_RUNNING, &ar->dev_flags); return ret; } ath10k_dbg(ar, ATH10K_DBG_MAC, "mac cac start monitor vdev %d\n", ar->monitor_vdev_id); return 0; } static int ath10k_stop_cac(struct ath10k *ar) { lockdep_assert_held(&ar->conf_mutex); /* CAC is not running - do nothing */ if (!test_bit(ATH10K_CAC_RUNNING, &ar->dev_flags)) return 0; clear_bit(ATH10K_CAC_RUNNING, &ar->dev_flags); ath10k_monitor_stop(ar); ath10k_dbg(ar, ATH10K_DBG_MAC, "mac cac finished\n"); return 0; } static void ath10k_mac_has_radar_iter(struct ieee80211_hw *hw, struct ieee80211_chanctx_conf *conf, void *data) { bool *ret = data; if (!*ret && conf->radar_enabled) *ret = true; } static bool ath10k_mac_has_radar_enabled(struct ath10k *ar) { bool has_radar = false; ieee80211_iter_chan_contexts_atomic(ar->hw, ath10k_mac_has_radar_iter, &has_radar); return has_radar; } static void ath10k_recalc_radar_detection(struct ath10k *ar) { int ret; lockdep_assert_held(&ar->conf_mutex); ath10k_stop_cac(ar); if (!ath10k_mac_has_radar_enabled(ar)) return; if (ar->num_started_vdevs > 0) return; ret = ath10k_start_cac(ar); if (ret) { /* * Not possible to start CAC on current channel so starting * radiation is not allowed, make this channel DFS_UNAVAILABLE * by indicating that radar was detected. */ ath10k_warn(ar, "failed to start CAC: %d\n", ret); ieee80211_radar_detected(ar->hw, NULL); } } static int ath10k_vdev_stop(struct ath10k_vif *arvif) { struct ath10k *ar = arvif->ar; int ret; lockdep_assert_held(&ar->conf_mutex); reinit_completion(&ar->vdev_setup_done); reinit_completion(&ar->vdev_delete_done); ret = ath10k_wmi_vdev_stop(ar, arvif->vdev_id); if (ret) { ath10k_warn(ar, "failed to stop WMI vdev %i: %d\n", arvif->vdev_id, ret); return ret; } ret = ath10k_vdev_setup_sync(ar); if (ret) { ath10k_warn(ar, "failed to synchronize setup for vdev %i: %d\n", arvif->vdev_id, ret); return ret; } WARN_ON(ar->num_started_vdevs == 0); if (ar->num_started_vdevs != 0) { ar->num_started_vdevs--; ath10k_recalc_radar_detection(ar); } return ret; } static int ath10k_vdev_start_restart(struct ath10k_vif *arvif, const struct cfg80211_chan_def *chandef, bool restart) { struct ath10k *ar = arvif->ar; struct wmi_vdev_start_request_arg arg = {}; int ret = 0; lockdep_assert_held(&ar->conf_mutex); reinit_completion(&ar->vdev_setup_done); reinit_completion(&ar->vdev_delete_done); arg.vdev_id = arvif->vdev_id; arg.dtim_period = arvif->dtim_period; arg.bcn_intval = arvif->beacon_interval; arg.channel.freq = chandef->chan->center_freq; arg.channel.band_center_freq1 = chandef->center_freq1; arg.channel.band_center_freq2 = chandef->center_freq2; arg.channel.mode = chan_to_phymode(chandef); arg.channel.min_power = 0; arg.channel.max_power = chandef->chan->max_power * 2; arg.channel.max_reg_power = chandef->chan->max_reg_power * 2; arg.channel.max_antenna_gain = chandef->chan->max_antenna_gain; if (arvif->vdev_type == WMI_VDEV_TYPE_AP) { arg.ssid = arvif->u.ap.ssid; arg.ssid_len = arvif->u.ap.ssid_len; arg.hidden_ssid = arvif->u.ap.hidden_ssid; /* For now allow DFS for AP mode */ arg.channel.chan_radar = !!(chandef->chan->flags & IEEE80211_CHAN_RADAR); } else if (arvif->vdev_type == WMI_VDEV_TYPE_IBSS) { arg.ssid = arvif->vif->cfg.ssid; arg.ssid_len = arvif->vif->cfg.ssid_len; } ath10k_dbg(ar, ATH10K_DBG_MAC, "mac vdev %d start center_freq %d phymode %s\n", arg.vdev_id, arg.channel.freq, ath10k_wmi_phymode_str(arg.channel.mode)); if (restart) ret = ath10k_wmi_vdev_restart(ar, &arg); else ret = ath10k_wmi_vdev_start(ar, &arg); if (ret) { ath10k_warn(ar, "failed to start WMI vdev %i: %d\n", arg.vdev_id, ret); return ret; } ret = ath10k_vdev_setup_sync(ar); if (ret) { ath10k_warn(ar, "failed to synchronize setup for vdev %i restart %d: %d\n", arg.vdev_id, restart, ret); return ret; } ar->num_started_vdevs++; ath10k_recalc_radar_detection(ar); return ret; } static int ath10k_vdev_start(struct ath10k_vif *arvif, const struct cfg80211_chan_def *def) { return ath10k_vdev_start_restart(arvif, def, false); } static int ath10k_vdev_restart(struct ath10k_vif *arvif, const struct cfg80211_chan_def *def) { return ath10k_vdev_start_restart(arvif, def, true); } static int ath10k_mac_setup_bcn_p2p_ie(struct ath10k_vif *arvif, struct sk_buff *bcn) { struct ath10k *ar = arvif->ar; struct ieee80211_mgmt *mgmt; const u8 *p2p_ie; int ret; if (arvif->vif->type != NL80211_IFTYPE_AP || !arvif->vif->p2p) return 0; mgmt = (void *)bcn->data; p2p_ie = cfg80211_find_vendor_ie(WLAN_OUI_WFA, WLAN_OUI_TYPE_WFA_P2P, mgmt->u.beacon.variable, bcn->len - (mgmt->u.beacon.variable - bcn->data)); if (!p2p_ie) return -ENOENT; ret = ath10k_wmi_p2p_go_bcn_ie(ar, arvif->vdev_id, p2p_ie); if (ret) { ath10k_warn(ar, "failed to submit p2p go bcn ie for vdev %i: %d\n", arvif->vdev_id, ret); return ret; } return 0; } static int ath10k_mac_remove_vendor_ie(struct sk_buff *skb, unsigned int oui, u8 oui_type, size_t ie_offset) { size_t len; const u8 *next; const u8 *end; u8 *ie; if (WARN_ON(skb->len < ie_offset)) return -EINVAL; ie = (u8 *)cfg80211_find_vendor_ie(oui, oui_type, skb->data + ie_offset, skb->len - ie_offset); if (!ie) return -ENOENT; len = ie[1] + 2; end = skb->data + skb->len; next = ie + len; if (WARN_ON(next > end)) return -EINVAL; memmove(ie, next, end - next); skb_trim(skb, skb->len - len); return 0; } static int ath10k_mac_setup_bcn_tmpl(struct ath10k_vif *arvif) { struct ath10k *ar = arvif->ar; struct ieee80211_hw *hw = ar->hw; struct ieee80211_vif *vif = arvif->vif; struct ieee80211_mutable_offsets offs = {}; struct sk_buff *bcn; int ret; if (!test_bit(WMI_SERVICE_BEACON_OFFLOAD, ar->wmi.svc_map)) return 0; if (arvif->vdev_type != WMI_VDEV_TYPE_AP && arvif->vdev_type != WMI_VDEV_TYPE_IBSS) return 0; bcn = ieee80211_beacon_get_template(hw, vif, &offs, 0); if (!bcn) { ath10k_warn(ar, "failed to get beacon template from mac80211\n"); return -EPERM; } ret = ath10k_mac_setup_bcn_p2p_ie(arvif, bcn); if (ret) { ath10k_warn(ar, "failed to setup p2p go bcn ie: %d\n", ret); kfree_skb(bcn); return ret; } /* P2P IE is inserted by firmware automatically (as configured above) * so remove it from the base beacon template to avoid duplicate P2P * IEs in beacon frames. */ ath10k_mac_remove_vendor_ie(bcn, WLAN_OUI_WFA, WLAN_OUI_TYPE_WFA_P2P, offsetof(struct ieee80211_mgmt, u.beacon.variable)); ret = ath10k_wmi_bcn_tmpl(ar, arvif->vdev_id, offs.tim_offset, bcn, 0, 0, NULL, 0); kfree_skb(bcn); if (ret) { ath10k_warn(ar, "failed to submit beacon template command: %d\n", ret); return ret; } return 0; } static int ath10k_mac_setup_prb_tmpl(struct ath10k_vif *arvif) { struct ath10k *ar = arvif->ar; struct ieee80211_hw *hw = ar->hw; struct ieee80211_vif *vif = arvif->vif; struct sk_buff *prb; int ret; if (!test_bit(WMI_SERVICE_BEACON_OFFLOAD, ar->wmi.svc_map)) return 0; if (arvif->vdev_type != WMI_VDEV_TYPE_AP) return 0; /* For mesh, probe response and beacon share the same template */ if (ieee80211_vif_is_mesh(vif)) return 0; prb = ieee80211_proberesp_get(hw, vif); if (!prb) { ath10k_warn(ar, "failed to get probe resp template from mac80211\n"); return -EPERM; } ret = ath10k_wmi_prb_tmpl(ar, arvif->vdev_id, prb); kfree_skb(prb); if (ret) { ath10k_warn(ar, "failed to submit probe resp template command: %d\n", ret); return ret; } return 0; } static int ath10k_mac_vif_fix_hidden_ssid(struct ath10k_vif *arvif) { struct ath10k *ar = arvif->ar; struct cfg80211_chan_def def; int ret; /* When originally vdev is started during assign_vif_chanctx() some * information is missing, notably SSID. Firmware revisions with beacon * offloading require the SSID to be provided during vdev (re)start to * handle hidden SSID properly. * * Vdev restart must be done after vdev has been both started and * upped. Otherwise some firmware revisions (at least 10.2) fail to * deliver vdev restart response event causing timeouts during vdev * syncing in ath10k. * * Note: The vdev down/up and template reinstallation could be skipped * since only wmi-tlv firmware are known to have beacon offload and * wmi-tlv doesn't seem to misbehave like 10.2 wrt vdev restart * response delivery. It's probably more robust to keep it as is. */ if (!test_bit(WMI_SERVICE_BEACON_OFFLOAD, ar->wmi.svc_map)) return 0; if (WARN_ON(!arvif->is_started)) return -EINVAL; if (WARN_ON(!arvif->is_up)) return -EINVAL; if (WARN_ON(ath10k_mac_vif_chan(arvif->vif, &def))) return -EINVAL; ret = ath10k_wmi_vdev_down(ar, arvif->vdev_id); if (ret) { ath10k_warn(ar, "failed to bring down ap vdev %i: %d\n", arvif->vdev_id, ret); return ret; } /* Vdev down reset beacon & presp templates. Reinstall them. Otherwise * firmware will crash upon vdev up. */ ret = ath10k_mac_setup_bcn_tmpl(arvif); if (ret) { ath10k_warn(ar, "failed to update beacon template: %d\n", ret); return ret; } ret = ath10k_mac_setup_prb_tmpl(arvif); if (ret) { ath10k_warn(ar, "failed to update presp template: %d\n", ret); return ret; } ret = ath10k_vdev_restart(arvif, &def); if (ret) { ath10k_warn(ar, "failed to restart ap vdev %i: %d\n", arvif->vdev_id, ret); return ret; } ret = ath10k_wmi_vdev_up(arvif->ar, arvif->vdev_id, arvif->aid, arvif->bssid); if (ret) { ath10k_warn(ar, "failed to bring up ap vdev %i: %d\n", arvif->vdev_id, ret); return ret; } return 0; } static void ath10k_control_beaconing(struct ath10k_vif *arvif, struct ieee80211_bss_conf *info) { struct ath10k *ar = arvif->ar; int ret = 0; lockdep_assert_held(&arvif->ar->conf_mutex); if (!info->enable_beacon) { ret = ath10k_wmi_vdev_down(ar, arvif->vdev_id); if (ret) ath10k_warn(ar, "failed to down vdev_id %i: %d\n", arvif->vdev_id, ret); arvif->is_up = false; spin_lock_bh(&arvif->ar->data_lock); ath10k_mac_vif_beacon_free(arvif); spin_unlock_bh(&arvif->ar->data_lock); return; } arvif->tx_seq_no = 0x1000; arvif->aid = 0; ether_addr_copy(arvif->bssid, info->bssid); ret = ath10k_wmi_vdev_up(arvif->ar, arvif->vdev_id, arvif->aid, arvif->bssid); if (ret) { ath10k_warn(ar, "failed to bring up vdev %d: %i\n", arvif->vdev_id, ret); return; } arvif->is_up = true; ret = ath10k_mac_vif_fix_hidden_ssid(arvif); if (ret) { ath10k_warn(ar, "failed to fix hidden ssid for vdev %i, expect trouble: %d\n", arvif->vdev_id, ret); return; } ath10k_dbg(ar, ATH10K_DBG_MAC, "mac vdev %d up\n", arvif->vdev_id); } static void ath10k_control_ibss(struct ath10k_vif *arvif, struct ieee80211_vif *vif) { struct ath10k *ar = arvif->ar; u32 vdev_param; int ret = 0; lockdep_assert_held(&arvif->ar->conf_mutex); if (!vif->cfg.ibss_joined) { if (is_zero_ether_addr(arvif->bssid)) return; eth_zero_addr(arvif->bssid); return; } vdev_param = arvif->ar->wmi.vdev_param->atim_window; ret = ath10k_wmi_vdev_set_param(arvif->ar, arvif->vdev_id, vdev_param, ATH10K_DEFAULT_ATIM); if (ret) ath10k_warn(ar, "failed to set IBSS ATIM for vdev %d: %d\n", arvif->vdev_id, ret); } static int ath10k_mac_vif_recalc_ps_wake_threshold(struct ath10k_vif *arvif) { struct ath10k *ar = arvif->ar; u32 param; u32 value; int ret; lockdep_assert_held(&arvif->ar->conf_mutex); if (arvif->u.sta.uapsd) value = WMI_STA_PS_TX_WAKE_THRESHOLD_NEVER; else value = WMI_STA_PS_TX_WAKE_THRESHOLD_ALWAYS; param = WMI_STA_PS_PARAM_TX_WAKE_THRESHOLD; ret = ath10k_wmi_set_sta_ps_param(ar, arvif->vdev_id, param, value); if (ret) { ath10k_warn(ar, "failed to submit ps wake threshold %u on vdev %i: %d\n", value, arvif->vdev_id, ret); return ret; } return 0; } static int ath10k_mac_vif_recalc_ps_poll_count(struct ath10k_vif *arvif) { struct ath10k *ar = arvif->ar; u32 param; u32 value; int ret; lockdep_assert_held(&arvif->ar->conf_mutex); if (arvif->u.sta.uapsd) value = WMI_STA_PS_PSPOLL_COUNT_UAPSD; else value = WMI_STA_PS_PSPOLL_COUNT_NO_MAX; param = WMI_STA_PS_PARAM_PSPOLL_COUNT; ret = ath10k_wmi_set_sta_ps_param(ar, arvif->vdev_id, param, value); if (ret) { ath10k_warn(ar, "failed to submit ps poll count %u on vdev %i: %d\n", value, arvif->vdev_id, ret); return ret; } return 0; } static int ath10k_mac_num_vifs_started(struct ath10k *ar) { struct ath10k_vif *arvif; int num = 0; lockdep_assert_held(&ar->conf_mutex); list_for_each_entry(arvif, &ar->arvifs, list) if (arvif->is_started) num++; return num; } static int ath10k_mac_vif_setup_ps(struct ath10k_vif *arvif) { struct ath10k *ar = arvif->ar; struct ieee80211_vif *vif = arvif->vif; struct ieee80211_conf *conf = &ar->hw->conf; enum wmi_sta_powersave_param param; enum wmi_sta_ps_mode psmode; int ret; int ps_timeout; bool enable_ps; lockdep_assert_held(&arvif->ar->conf_mutex); if (arvif->vif->type != NL80211_IFTYPE_STATION) return 0; enable_ps = arvif->ps; if (enable_ps && ath10k_mac_num_vifs_started(ar) > 1 && !test_bit(ATH10K_FW_FEATURE_MULTI_VIF_PS_SUPPORT, ar->running_fw->fw_file.fw_features)) { ath10k_warn(ar, "refusing to enable ps on vdev %i: not supported by fw\n", arvif->vdev_id); enable_ps = false; } if (!arvif->is_started) { /* mac80211 can update vif powersave state while disconnected. * Firmware doesn't behave nicely and consumes more power than * necessary if PS is disabled on a non-started vdev. Hence * force-enable PS for non-running vdevs. */ psmode = WMI_STA_PS_MODE_ENABLED; } else if (enable_ps) { psmode = WMI_STA_PS_MODE_ENABLED; param = WMI_STA_PS_PARAM_INACTIVITY_TIME; ps_timeout = conf->dynamic_ps_timeout; if (ps_timeout == 0) { /* Firmware doesn't like 0 */ ps_timeout = ieee80211_tu_to_usec( vif->bss_conf.beacon_int) / 1000; } ret = ath10k_wmi_set_sta_ps_param(ar, arvif->vdev_id, param, ps_timeout); if (ret) { ath10k_warn(ar, "failed to set inactivity time for vdev %d: %i\n", arvif->vdev_id, ret); return ret; } } else { psmode = WMI_STA_PS_MODE_DISABLED; } ath10k_dbg(ar, ATH10K_DBG_MAC, "mac vdev %d psmode %s\n", arvif->vdev_id, psmode ? "enable" : "disable"); ret = ath10k_wmi_set_psmode(ar, arvif->vdev_id, psmode); if (ret) { ath10k_warn(ar, "failed to set PS Mode %d for vdev %d: %d\n", psmode, arvif->vdev_id, ret); return ret; } return 0; } static int ath10k_mac_vif_disable_keepalive(struct ath10k_vif *arvif) { struct ath10k *ar = arvif->ar; struct wmi_sta_keepalive_arg arg = {}; int ret; lockdep_assert_held(&arvif->ar->conf_mutex); if (arvif->vdev_type != WMI_VDEV_TYPE_STA) return 0; if (!test_bit(WMI_SERVICE_STA_KEEP_ALIVE, ar->wmi.svc_map)) return 0; /* Some firmware revisions have a bug and ignore the `enabled` field. * Instead use the interval to disable the keepalive. */ arg.vdev_id = arvif->vdev_id; arg.enabled = 1; arg.method = WMI_STA_KEEPALIVE_METHOD_NULL_FRAME; arg.interval = WMI_STA_KEEPALIVE_INTERVAL_DISABLE; ret = ath10k_wmi_sta_keepalive(ar, &arg); if (ret) { ath10k_warn(ar, "failed to submit keepalive on vdev %i: %d\n", arvif->vdev_id, ret); return ret; } return 0; } static void ath10k_mac_vif_ap_csa_count_down(struct ath10k_vif *arvif) { struct ath10k *ar = arvif->ar; struct ieee80211_vif *vif = arvif->vif; int ret; lockdep_assert_held(&arvif->ar->conf_mutex); if (WARN_ON(!test_bit(WMI_SERVICE_BEACON_OFFLOAD, ar->wmi.svc_map))) return; if (arvif->vdev_type != WMI_VDEV_TYPE_AP) return; if (!vif->bss_conf.csa_active) return; if (!arvif->is_up) return; if (!ieee80211_beacon_cntdwn_is_complete(vif, 0)) { ieee80211_beacon_update_cntdwn(vif, 0); ret = ath10k_mac_setup_bcn_tmpl(arvif); if (ret) ath10k_warn(ar, "failed to update bcn tmpl during csa: %d\n", ret); ret = ath10k_mac_setup_prb_tmpl(arvif); if (ret) ath10k_warn(ar, "failed to update prb tmpl during csa: %d\n", ret); } else { ieee80211_csa_finish(vif, 0); } } static void ath10k_mac_vif_ap_csa_work(struct work_struct *work) { struct ath10k_vif *arvif = container_of(work, struct ath10k_vif, ap_csa_work); struct ath10k *ar = arvif->ar; mutex_lock(&ar->conf_mutex); ath10k_mac_vif_ap_csa_count_down(arvif); mutex_unlock(&ar->conf_mutex); } static void ath10k_mac_handle_beacon_iter(void *data, u8 *mac, struct ieee80211_vif *vif) { struct sk_buff *skb = data; struct ieee80211_mgmt *mgmt = (void *)skb->data; struct ath10k_vif *arvif = (void *)vif->drv_priv; if (vif->type != NL80211_IFTYPE_STATION) return; if (!ether_addr_equal(mgmt->bssid, vif->bss_conf.bssid)) return; cancel_delayed_work(&arvif->connection_loss_work); } void ath10k_mac_handle_beacon(struct ath10k *ar, struct sk_buff *skb) { ieee80211_iterate_active_interfaces_atomic(ar->hw, ATH10K_ITER_NORMAL_FLAGS, ath10k_mac_handle_beacon_iter, skb); } static void ath10k_mac_handle_beacon_miss_iter(void *data, u8 *mac, struct ieee80211_vif *vif) { u32 *vdev_id = data; struct ath10k_vif *arvif = (void *)vif->drv_priv; struct ath10k *ar = arvif->ar; struct ieee80211_hw *hw = ar->hw; if (arvif->vdev_id != *vdev_id) return; if (!arvif->is_up) return; ieee80211_beacon_loss(vif); /* Firmware doesn't report beacon loss events repeatedly. If AP probe * (done by mac80211) succeeds but beacons do not resume then it * doesn't make sense to continue operation. Queue connection loss work * which can be cancelled when beacon is received. */ ieee80211_queue_delayed_work(hw, &arvif->connection_loss_work, ATH10K_CONNECTION_LOSS_HZ); } void ath10k_mac_handle_beacon_miss(struct ath10k *ar, u32 vdev_id) { ieee80211_iterate_active_interfaces_atomic(ar->hw, ATH10K_ITER_NORMAL_FLAGS, ath10k_mac_handle_beacon_miss_iter, &vdev_id); } static void ath10k_mac_vif_sta_connection_loss_work(struct work_struct *work) { struct ath10k_vif *arvif = container_of(work, struct ath10k_vif, connection_loss_work.work); struct ieee80211_vif *vif = arvif->vif; if (!arvif->is_up) return; ieee80211_connection_loss(vif); } /**********************/ /* Station management */ /**********************/ static u32 ath10k_peer_assoc_h_listen_intval(struct ath10k *ar, struct ieee80211_vif *vif) { /* Some firmware revisions have unstable STA powersave when listen * interval is set too high (e.g. 5). The symptoms are firmware doesn't * generate NullFunc frames properly even if buffered frames have been * indicated in Beacon TIM. Firmware would seldom wake up to pull * buffered frames. Often pinging the device from AP would simply fail. * * As a workaround set it to 1. */ if (vif->type == NL80211_IFTYPE_STATION) return 1; return ar->hw->conf.listen_interval; } static void ath10k_peer_assoc_h_basic(struct ath10k *ar, struct ieee80211_vif *vif, struct ieee80211_sta *sta, struct wmi_peer_assoc_complete_arg *arg) { struct ath10k_vif *arvif = (void *)vif->drv_priv; u32 aid; lockdep_assert_held(&ar->conf_mutex); if (vif->type == NL80211_IFTYPE_STATION) aid = vif->cfg.aid; else aid = sta->aid; ether_addr_copy(arg->addr, sta->addr); arg->vdev_id = arvif->vdev_id; arg->peer_aid = aid; arg->peer_flags |= arvif->ar->wmi.peer_flags->auth; arg->peer_listen_intval = ath10k_peer_assoc_h_listen_intval(ar, vif); arg->peer_num_spatial_streams = 1; arg->peer_caps = vif->bss_conf.assoc_capability; } static void ath10k_peer_assoc_h_crypto(struct ath10k *ar, struct ieee80211_vif *vif, struct ieee80211_sta *sta, struct wmi_peer_assoc_complete_arg *arg) { struct ieee80211_bss_conf *info = &vif->bss_conf; struct cfg80211_chan_def def; struct cfg80211_bss *bss; const u8 *rsnie = NULL; const u8 *wpaie = NULL; lockdep_assert_held(&ar->conf_mutex); if (WARN_ON(ath10k_mac_vif_chan(vif, &def))) return; bss = cfg80211_get_bss(ar->hw->wiphy, def.chan, info->bssid, vif->cfg.ssid_len ? vif->cfg.ssid : NULL, vif->cfg.ssid_len, IEEE80211_BSS_TYPE_ANY, IEEE80211_PRIVACY_ANY); if (bss) { const struct cfg80211_bss_ies *ies; rcu_read_lock(); rsnie = ieee80211_bss_get_ie(bss, WLAN_EID_RSN); ies = rcu_dereference(bss->ies); wpaie = cfg80211_find_vendor_ie(WLAN_OUI_MICROSOFT, WLAN_OUI_TYPE_MICROSOFT_WPA, ies->data, ies->len); rcu_read_unlock(); cfg80211_put_bss(ar->hw->wiphy, bss); } /* FIXME: base on RSN IE/WPA IE is a correct idea? */ if (rsnie || wpaie) { ath10k_dbg(ar, ATH10K_DBG_WMI, "%s: rsn ie found\n", __func__); arg->peer_flags |= ar->wmi.peer_flags->need_ptk_4_way; } if (wpaie) { ath10k_dbg(ar, ATH10K_DBG_WMI, "%s: wpa ie found\n", __func__); arg->peer_flags |= ar->wmi.peer_flags->need_gtk_2_way; } if (sta->mfp && test_bit(ATH10K_FW_FEATURE_MFP_SUPPORT, ar->running_fw->fw_file.fw_features)) { arg->peer_flags |= ar->wmi.peer_flags->pmf; } } static void ath10k_peer_assoc_h_rates(struct ath10k *ar, struct ieee80211_vif *vif, struct ieee80211_sta *sta, struct wmi_peer_assoc_complete_arg *arg) { struct ath10k_vif *arvif = (void *)vif->drv_priv; struct wmi_rate_set_arg *rateset = &arg->peer_legacy_rates; struct cfg80211_chan_def def; const struct ieee80211_supported_band *sband; const struct ieee80211_rate *rates; enum nl80211_band band; u32 ratemask; u8 rate; int i; lockdep_assert_held(&ar->conf_mutex); if (WARN_ON(ath10k_mac_vif_chan(vif, &def))) return; band = def.chan->band; sband = ar->hw->wiphy->bands[band]; ratemask = sta->deflink.supp_rates[band]; ratemask &= arvif->bitrate_mask.control[band].legacy; rates = sband->bitrates; rateset->num_rates = 0; for (i = 0; i < 32; i++, ratemask >>= 1, rates++) { if (!(ratemask & 1)) continue; rate = ath10k_mac_bitrate_to_rate(rates->bitrate); rateset->rates[rateset->num_rates] = rate; rateset->num_rates++; } } static bool ath10k_peer_assoc_h_ht_masked(const u8 ht_mcs_mask[IEEE80211_HT_MCS_MASK_LEN]) { int nss; for (nss = 0; nss < IEEE80211_HT_MCS_MASK_LEN; nss++) if (ht_mcs_mask[nss]) return false; return true; } static bool ath10k_peer_assoc_h_vht_masked(const u16 vht_mcs_mask[NL80211_VHT_NSS_MAX]) { int nss; for (nss = 0; nss < NL80211_VHT_NSS_MAX; nss++) if (vht_mcs_mask[nss]) return false; return true; } static void ath10k_peer_assoc_h_ht(struct ath10k *ar, struct ieee80211_vif *vif, struct ieee80211_sta *sta, struct wmi_peer_assoc_complete_arg *arg) { const struct ieee80211_sta_ht_cap *ht_cap = &sta->deflink.ht_cap; struct ath10k_vif *arvif = (void *)vif->drv_priv; struct cfg80211_chan_def def; enum nl80211_band band; const u8 *ht_mcs_mask; const u16 *vht_mcs_mask; int i, n; u8 max_nss; u32 stbc; lockdep_assert_held(&ar->conf_mutex); if (WARN_ON(ath10k_mac_vif_chan(vif, &def))) return; if (!ht_cap->ht_supported) return; band = def.chan->band; ht_mcs_mask = arvif->bitrate_mask.control[band].ht_mcs; vht_mcs_mask = arvif->bitrate_mask.control[band].vht_mcs; if (ath10k_peer_assoc_h_ht_masked(ht_mcs_mask) && ath10k_peer_assoc_h_vht_masked(vht_mcs_mask)) return; arg->peer_flags |= ar->wmi.peer_flags->ht; arg->peer_max_mpdu = (1 << (IEEE80211_HT_MAX_AMPDU_FACTOR + ht_cap->ampdu_factor)) - 1; arg->peer_mpdu_density = ath10k_parse_mpdudensity(ht_cap->ampdu_density); arg->peer_ht_caps = ht_cap->cap; arg->peer_rate_caps |= WMI_RC_HT_FLAG; if (ht_cap->cap & IEEE80211_HT_CAP_LDPC_CODING) arg->peer_flags |= ar->wmi.peer_flags->ldbc; if (sta->deflink.bandwidth >= IEEE80211_STA_RX_BW_40) { arg->peer_flags |= ar->wmi.peer_flags->bw40; arg->peer_rate_caps |= WMI_RC_CW40_FLAG; } if (arvif->bitrate_mask.control[band].gi != NL80211_TXRATE_FORCE_LGI) { if (ht_cap->cap & IEEE80211_HT_CAP_SGI_20) arg->peer_rate_caps |= WMI_RC_SGI_FLAG; if (ht_cap->cap & IEEE80211_HT_CAP_SGI_40) arg->peer_rate_caps |= WMI_RC_SGI_FLAG; } if (ht_cap->cap & IEEE80211_HT_CAP_TX_STBC) { arg->peer_rate_caps |= WMI_RC_TX_STBC_FLAG; arg->peer_flags |= ar->wmi.peer_flags->stbc; } if (ht_cap->cap & IEEE80211_HT_CAP_RX_STBC) { stbc = ht_cap->cap & IEEE80211_HT_CAP_RX_STBC; stbc = stbc >> IEEE80211_HT_CAP_RX_STBC_SHIFT; stbc = stbc << WMI_RC_RX_STBC_FLAG_S; arg->peer_rate_caps |= stbc; arg->peer_flags |= ar->wmi.peer_flags->stbc; } if (ht_cap->mcs.rx_mask[1] && ht_cap->mcs.rx_mask[2]) arg->peer_rate_caps |= WMI_RC_TS_FLAG; else if (ht_cap->mcs.rx_mask[1]) arg->peer_rate_caps |= WMI_RC_DS_FLAG; for (i = 0, n = 0, max_nss = 0; i < IEEE80211_HT_MCS_MASK_LEN * 8; i++) if ((ht_cap->mcs.rx_mask[i / 8] & BIT(i % 8)) && (ht_mcs_mask[i / 8] & BIT(i % 8))) { max_nss = (i / 8) + 1; arg->peer_ht_rates.rates[n++] = i; } /* * This is a workaround for HT-enabled STAs which break the spec * and have no HT capabilities RX mask (no HT RX MCS map). * * As per spec, in section 20.3.5 Modulation and coding scheme (MCS), * MCS 0 through 7 are mandatory in 20MHz with 800 ns GI at all STAs. * * Firmware asserts if such situation occurs. */ if (n == 0) { arg->peer_ht_rates.num_rates = 8; for (i = 0; i < arg->peer_ht_rates.num_rates; i++) arg->peer_ht_rates.rates[i] = i; } else { arg->peer_ht_rates.num_rates = n; arg->peer_num_spatial_streams = min(sta->deflink.rx_nss, max_nss); } ath10k_dbg(ar, ATH10K_DBG_MAC, "mac ht peer %pM mcs cnt %d nss %d\n", arg->addr, arg->peer_ht_rates.num_rates, arg->peer_num_spatial_streams); } static int ath10k_peer_assoc_qos_ap(struct ath10k *ar, struct ath10k_vif *arvif, struct ieee80211_sta *sta) { u32 uapsd = 0; u32 max_sp = 0; int ret = 0; lockdep_assert_held(&ar->conf_mutex); if (sta->wme && sta->uapsd_queues) { ath10k_dbg(ar, ATH10K_DBG_MAC, "mac uapsd_queues 0x%x max_sp %d\n", sta->uapsd_queues, sta->max_sp); if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) uapsd |= WMI_AP_PS_UAPSD_AC3_DELIVERY_EN | WMI_AP_PS_UAPSD_AC3_TRIGGER_EN; if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) uapsd |= WMI_AP_PS_UAPSD_AC2_DELIVERY_EN | WMI_AP_PS_UAPSD_AC2_TRIGGER_EN; if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) uapsd |= WMI_AP_PS_UAPSD_AC1_DELIVERY_EN | WMI_AP_PS_UAPSD_AC1_TRIGGER_EN; if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) uapsd |= WMI_AP_PS_UAPSD_AC0_DELIVERY_EN | WMI_AP_PS_UAPSD_AC0_TRIGGER_EN; if (sta->max_sp < MAX_WMI_AP_PS_PEER_PARAM_MAX_SP) max_sp = sta->max_sp; ret = ath10k_wmi_set_ap_ps_param(ar, arvif->vdev_id, sta->addr, WMI_AP_PS_PEER_PARAM_UAPSD, uapsd); if (ret) { ath10k_warn(ar, "failed to set ap ps peer param uapsd for vdev %i: %d\n", arvif->vdev_id, ret); return ret; } ret = ath10k_wmi_set_ap_ps_param(ar, arvif->vdev_id, sta->addr, WMI_AP_PS_PEER_PARAM_MAX_SP, max_sp); if (ret) { ath10k_warn(ar, "failed to set ap ps peer param max sp for vdev %i: %d\n", arvif->vdev_id, ret); return ret; } /* TODO setup this based on STA listen interval and * beacon interval. Currently we don't know * sta->listen_interval - mac80211 patch required. * Currently use 10 seconds */ ret = ath10k_wmi_set_ap_ps_param(ar, arvif->vdev_id, sta->addr, WMI_AP_PS_PEER_PARAM_AGEOUT_TIME, 10); if (ret) { ath10k_warn(ar, "failed to set ap ps peer param ageout time for vdev %i: %d\n", arvif->vdev_id, ret); return ret; } } return 0; } static u16 ath10k_peer_assoc_h_vht_limit(u16 tx_mcs_set, const u16 vht_mcs_limit[NL80211_VHT_NSS_MAX]) { int idx_limit; int nss; u16 mcs_map; u16 mcs; for (nss = 0; nss < NL80211_VHT_NSS_MAX; nss++) { mcs_map = ath10k_mac_get_max_vht_mcs_map(tx_mcs_set, nss) & vht_mcs_limit[nss]; if (mcs_map) idx_limit = fls(mcs_map) - 1; else idx_limit = -1; switch (idx_limit) { case 0: case 1: case 2: case 3: case 4: case 5: case 6: default: /* see ath10k_mac_can_set_bitrate_mask() */ WARN_ON(1); fallthrough; case -1: mcs = IEEE80211_VHT_MCS_NOT_SUPPORTED; break; case 7: mcs = IEEE80211_VHT_MCS_SUPPORT_0_7; break; case 8: mcs = IEEE80211_VHT_MCS_SUPPORT_0_8; break; case 9: mcs = IEEE80211_VHT_MCS_SUPPORT_0_9; break; } tx_mcs_set &= ~(0x3 << (nss * 2)); tx_mcs_set |= mcs << (nss * 2); } return tx_mcs_set; } static u32 get_160mhz_nss_from_maxrate(int rate) { u32 nss; switch (rate) { case 780: nss = 1; break; case 1560: nss = 2; break; case 2106: nss = 3; /* not support MCS9 from spec*/ break; case 3120: nss = 4; break; default: nss = 1; } return nss; } static void ath10k_peer_assoc_h_vht(struct ath10k *ar, struct ieee80211_vif *vif, struct ieee80211_sta *sta, struct wmi_peer_assoc_complete_arg *arg) { const struct ieee80211_sta_vht_cap *vht_cap = &sta->deflink.vht_cap; struct ath10k_vif *arvif = (void *)vif->drv_priv; struct ath10k_hw_params *hw = &ar->hw_params; struct cfg80211_chan_def def; enum nl80211_band band; const u16 *vht_mcs_mask; u8 ampdu_factor; u8 max_nss, vht_mcs; int i; if (WARN_ON(ath10k_mac_vif_chan(vif, &def))) return; if (!vht_cap->vht_supported) return; band = def.chan->band; vht_mcs_mask = arvif->bitrate_mask.control[band].vht_mcs; if (ath10k_peer_assoc_h_vht_masked(vht_mcs_mask)) return; arg->peer_flags |= ar->wmi.peer_flags->vht; if (def.chan->band == NL80211_BAND_2GHZ) arg->peer_flags |= ar->wmi.peer_flags->vht_2g; arg->peer_vht_caps = vht_cap->cap; ampdu_factor = (vht_cap->cap & IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK) >> IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT; /* Workaround: Some Netgear/Linksys 11ac APs set Rx A-MPDU factor to * zero in VHT IE. Using it would result in degraded throughput. * arg->peer_max_mpdu at this point contains HT max_mpdu so keep * it if VHT max_mpdu is smaller. */ arg->peer_max_mpdu = max(arg->peer_max_mpdu, (1U << (IEEE80211_HT_MAX_AMPDU_FACTOR + ampdu_factor)) - 1); if (sta->deflink.bandwidth == IEEE80211_STA_RX_BW_80) arg->peer_flags |= ar->wmi.peer_flags->bw80; if (sta->deflink.bandwidth == IEEE80211_STA_RX_BW_160) arg->peer_flags |= ar->wmi.peer_flags->bw160; /* Calculate peer NSS capability from VHT capabilities if STA * supports VHT. */ for (i = 0, max_nss = 0, vht_mcs = 0; i < NL80211_VHT_NSS_MAX; i++) { vht_mcs = __le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map) >> (2 * i) & 3; if ((vht_mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED) && vht_mcs_mask[i]) max_nss = i + 1; } arg->peer_num_spatial_streams = min(sta->deflink.rx_nss, max_nss); arg->peer_vht_rates.rx_max_rate = __le16_to_cpu(vht_cap->vht_mcs.rx_highest); arg->peer_vht_rates.rx_mcs_set = __le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map); arg->peer_vht_rates.tx_max_rate = __le16_to_cpu(vht_cap->vht_mcs.tx_highest); arg->peer_vht_rates.tx_mcs_set = ath10k_peer_assoc_h_vht_limit( __le16_to_cpu(vht_cap->vht_mcs.tx_mcs_map), vht_mcs_mask); /* Configure bandwidth-NSS mapping to FW * for the chip's tx chains setting on 160Mhz bw */ if (arg->peer_phymode == MODE_11AC_VHT160 || arg->peer_phymode == MODE_11AC_VHT80_80) { u32 rx_nss; u32 max_rate; max_rate = arg->peer_vht_rates.rx_max_rate; rx_nss = get_160mhz_nss_from_maxrate(max_rate); if (rx_nss == 0) rx_nss = arg->peer_num_spatial_streams; else rx_nss = min(arg->peer_num_spatial_streams, rx_nss); max_rate = hw->vht160_mcs_tx_highest; rx_nss = min(rx_nss, get_160mhz_nss_from_maxrate(max_rate)); arg->peer_bw_rxnss_override = FIELD_PREP(WMI_PEER_NSS_MAP_ENABLE, 1) | FIELD_PREP(WMI_PEER_NSS_160MHZ_MASK, (rx_nss - 1)); if (arg->peer_phymode == MODE_11AC_VHT80_80) { arg->peer_bw_rxnss_override |= FIELD_PREP(WMI_PEER_NSS_80_80MHZ_MASK, (rx_nss - 1)); } } ath10k_dbg(ar, ATH10K_DBG_MAC, "mac vht peer %pM max_mpdu %d flags 0x%x peer_rx_nss_override 0x%x\n", sta->addr, arg->peer_max_mpdu, arg->peer_flags, arg->peer_bw_rxnss_override); } static void ath10k_peer_assoc_h_qos(struct ath10k *ar, struct ieee80211_vif *vif, struct ieee80211_sta *sta, struct wmi_peer_assoc_complete_arg *arg) { struct ath10k_vif *arvif = (void *)vif->drv_priv; switch (arvif->vdev_type) { case WMI_VDEV_TYPE_AP: if (sta->wme) arg->peer_flags |= arvif->ar->wmi.peer_flags->qos; if (sta->wme && sta->uapsd_queues) { arg->peer_flags |= arvif->ar->wmi.peer_flags->apsd; arg->peer_rate_caps |= WMI_RC_UAPSD_FLAG; } break; case WMI_VDEV_TYPE_STA: if (sta->wme) arg->peer_flags |= arvif->ar->wmi.peer_flags->qos; break; case WMI_VDEV_TYPE_IBSS: if (sta->wme) arg->peer_flags |= arvif->ar->wmi.peer_flags->qos; break; default: break; } ath10k_dbg(ar, ATH10K_DBG_MAC, "mac peer %pM qos %d\n", sta->addr, !!(arg->peer_flags & arvif->ar->wmi.peer_flags->qos)); } static bool ath10k_mac_sta_has_ofdm_only(struct ieee80211_sta *sta) { return sta->deflink.supp_rates[NL80211_BAND_2GHZ] >> ATH10K_MAC_FIRST_OFDM_RATE_IDX; } static enum wmi_phy_mode ath10k_mac_get_phymode_vht(struct ath10k *ar, struct ieee80211_sta *sta) { struct ieee80211_sta_vht_cap *vht_cap = &sta->deflink.vht_cap; if (sta->deflink.bandwidth == IEEE80211_STA_RX_BW_160) { switch (vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) { case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ: return MODE_11AC_VHT160; case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ: return MODE_11AC_VHT80_80; default: /* not sure if this is a valid case? */ return MODE_11AC_VHT160; } } if (sta->deflink.bandwidth == IEEE80211_STA_RX_BW_80) return MODE_11AC_VHT80; if (sta->deflink.bandwidth == IEEE80211_STA_RX_BW_40) return MODE_11AC_VHT40; if (sta->deflink.bandwidth == IEEE80211_STA_RX_BW_20) return MODE_11AC_VHT20; return MODE_UNKNOWN; } static void ath10k_peer_assoc_h_phymode(struct ath10k *ar, struct ieee80211_vif *vif, struct ieee80211_sta *sta, struct wmi_peer_assoc_complete_arg *arg) { struct ath10k_vif *arvif = (void *)vif->drv_priv; struct cfg80211_chan_def def; enum nl80211_band band; const u8 *ht_mcs_mask; const u16 *vht_mcs_mask; enum wmi_phy_mode phymode = MODE_UNKNOWN; if (WARN_ON(ath10k_mac_vif_chan(vif, &def))) return; band = def.chan->band; ht_mcs_mask = arvif->bitrate_mask.control[band].ht_mcs; vht_mcs_mask = arvif->bitrate_mask.control[band].vht_mcs; switch (band) { case NL80211_BAND_2GHZ: if (sta->deflink.vht_cap.vht_supported && !ath10k_peer_assoc_h_vht_masked(vht_mcs_mask)) { if (sta->deflink.bandwidth == IEEE80211_STA_RX_BW_40) phymode = MODE_11AC_VHT40; else phymode = MODE_11AC_VHT20; } else if (sta->deflink.ht_cap.ht_supported && !ath10k_peer_assoc_h_ht_masked(ht_mcs_mask)) { if (sta->deflink.bandwidth == IEEE80211_STA_RX_BW_40) phymode = MODE_11NG_HT40; else phymode = MODE_11NG_HT20; } else if (ath10k_mac_sta_has_ofdm_only(sta)) { phymode = MODE_11G; } else { phymode = MODE_11B; } break; case NL80211_BAND_5GHZ: /* * Check VHT first. */ if (sta->deflink.vht_cap.vht_supported && !ath10k_peer_assoc_h_vht_masked(vht_mcs_mask)) { phymode = ath10k_mac_get_phymode_vht(ar, sta); } else if (sta->deflink.ht_cap.ht_supported && !ath10k_peer_assoc_h_ht_masked(ht_mcs_mask)) { if (sta->deflink.bandwidth >= IEEE80211_STA_RX_BW_40) phymode = MODE_11NA_HT40; else phymode = MODE_11NA_HT20; } else { phymode = MODE_11A; } break; default: break; } ath10k_dbg(ar, ATH10K_DBG_MAC, "mac peer %pM phymode %s\n", sta->addr, ath10k_wmi_phymode_str(phymode)); arg->peer_phymode = phymode; WARN_ON(phymode == MODE_UNKNOWN); } static int ath10k_peer_assoc_prepare(struct ath10k *ar, struct ieee80211_vif *vif, struct ieee80211_sta *sta, struct wmi_peer_assoc_complete_arg *arg) { lockdep_assert_held(&ar->conf_mutex); memset(arg, 0, sizeof(*arg)); ath10k_peer_assoc_h_basic(ar, vif, sta, arg); ath10k_peer_assoc_h_crypto(ar, vif, sta, arg); ath10k_peer_assoc_h_rates(ar, vif, sta, arg); ath10k_peer_assoc_h_ht(ar, vif, sta, arg); ath10k_peer_assoc_h_phymode(ar, vif, sta, arg); ath10k_peer_assoc_h_vht(ar, vif, sta, arg); ath10k_peer_assoc_h_qos(ar, vif, sta, arg); return 0; } static const u32 ath10k_smps_map[] = { [WLAN_HT_CAP_SM_PS_STATIC] = WMI_PEER_SMPS_STATIC, [WLAN_HT_CAP_SM_PS_DYNAMIC] = WMI_PEER_SMPS_DYNAMIC, [WLAN_HT_CAP_SM_PS_INVALID] = WMI_PEER_SMPS_PS_NONE, [WLAN_HT_CAP_SM_PS_DISABLED] = WMI_PEER_SMPS_PS_NONE, }; static int ath10k_setup_peer_smps(struct ath10k *ar, struct ath10k_vif *arvif, const u8 *addr, const struct ieee80211_sta_ht_cap *ht_cap) { int smps; if (!ht_cap->ht_supported) return 0; smps = ht_cap->cap & IEEE80211_HT_CAP_SM_PS; smps >>= IEEE80211_HT_CAP_SM_PS_SHIFT; if (smps >= ARRAY_SIZE(ath10k_smps_map)) return -EINVAL; return ath10k_wmi_peer_set_param(ar, arvif->vdev_id, addr, ar->wmi.peer_param->smps_state, ath10k_smps_map[smps]); } static int ath10k_mac_vif_recalc_txbf(struct ath10k *ar, struct ieee80211_vif *vif, struct ieee80211_sta_vht_cap vht_cap) { struct ath10k_vif *arvif = (void *)vif->drv_priv; int ret; u32 param; u32 value; if (ath10k_wmi_get_txbf_conf_scheme(ar) != WMI_TXBF_CONF_AFTER_ASSOC) return 0; if (!(ar->vht_cap_info & (IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE | IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) return 0; param = ar->wmi.vdev_param->txbf; value = 0; if (WARN_ON(param == WMI_VDEV_PARAM_UNSUPPORTED)) return 0; /* The following logic is correct. If a remote STA advertises support * for being a beamformer then we should enable us being a beamformee. */ if (ar->vht_cap_info & (IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE)) { if (vht_cap.cap & IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE) value |= WMI_VDEV_PARAM_TXBF_SU_TX_BFEE; if (vht_cap.cap & IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE) value |= WMI_VDEV_PARAM_TXBF_MU_TX_BFEE; } if (ar->vht_cap_info & (IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)) { if (vht_cap.cap & IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE) value |= WMI_VDEV_PARAM_TXBF_SU_TX_BFER; if (vht_cap.cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) value |= WMI_VDEV_PARAM_TXBF_MU_TX_BFER; } if (value & WMI_VDEV_PARAM_TXBF_MU_TX_BFEE) value |= WMI_VDEV_PARAM_TXBF_SU_TX_BFEE; if (value & WMI_VDEV_PARAM_TXBF_MU_TX_BFER) value |= WMI_VDEV_PARAM_TXBF_SU_TX_BFER; ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, param, value); if (ret) { ath10k_warn(ar, "failed to submit vdev param txbf 0x%x: %d\n", value, ret); return ret; } return 0; } static bool ath10k_mac_is_connected(struct ath10k *ar) { struct ath10k_vif *arvif; list_for_each_entry(arvif, &ar->arvifs, list) { if (arvif->is_up && arvif->vdev_type == WMI_VDEV_TYPE_STA) return true; } return false; } static int ath10k_mac_txpower_setup(struct ath10k *ar, int txpower) { int ret; u32 param; int tx_power_2g, tx_power_5g; bool connected; lockdep_assert_held(&ar->conf_mutex); /* ath10k internally uses unit of 0.5 dBm so multiply by 2 */ tx_power_2g = txpower * 2; tx_power_5g = txpower * 2; connected = ath10k_mac_is_connected(ar); if (connected && ar->tx_power_2g_limit) if (tx_power_2g > ar->tx_power_2g_limit) tx_power_2g = ar->tx_power_2g_limit; if (connected && ar->tx_power_5g_limit) if (tx_power_5g > ar->tx_power_5g_limit) tx_power_5g = ar->tx_power_5g_limit; ath10k_dbg(ar, ATH10K_DBG_MAC, "mac txpower 2g: %d, 5g: %d\n", tx_power_2g, tx_power_5g); param = ar->wmi.pdev_param->txpower_limit2g; ret = ath10k_wmi_pdev_set_param(ar, param, tx_power_2g); if (ret) { ath10k_warn(ar, "failed to set 2g txpower %d: %d\n", tx_power_2g, ret); return ret; } param = ar->wmi.pdev_param->txpower_limit5g; ret = ath10k_wmi_pdev_set_param(ar, param, tx_power_5g); if (ret) { ath10k_warn(ar, "failed to set 5g txpower %d: %d\n", tx_power_5g, ret); return ret; } return 0; } static int ath10k_mac_txpower_recalc(struct ath10k *ar) { struct ath10k_vif *arvif; int ret, txpower = -1; lockdep_assert_held(&ar->conf_mutex); list_for_each_entry(arvif, &ar->arvifs, list) { /* txpower not initialized yet? */ if (arvif->txpower == INT_MIN) continue; if (txpower == -1) txpower = arvif->txpower; else txpower = min(txpower, arvif->txpower); } if (txpower == -1) return 0; ret = ath10k_mac_txpower_setup(ar, txpower); if (ret) { ath10k_warn(ar, "failed to setup tx power %d: %d\n", txpower, ret); return ret; } return 0; } static int ath10k_mac_set_sar_power(struct ath10k *ar) { if (!ar->hw_params.dynamic_sar_support) return -EOPNOTSUPP; if (!ath10k_mac_is_connected(ar)) return 0; /* if connected, then arvif->txpower must be valid */ return ath10k_mac_txpower_recalc(ar); } static int ath10k_mac_set_sar_specs(struct ieee80211_hw *hw, const struct cfg80211_sar_specs *sar) { const struct cfg80211_sar_sub_specs *sub_specs; struct ath10k *ar = hw->priv; u32 i; int ret; mutex_lock(&ar->conf_mutex); if (!ar->hw_params.dynamic_sar_support) { ret = -EOPNOTSUPP; goto err; } if (!sar || sar->type != NL80211_SAR_TYPE_POWER || sar->num_sub_specs == 0) { ret = -EINVAL; goto err; } sub_specs = sar->sub_specs; /* 0dbm is not a practical value for ath10k, so use 0 * as no SAR limitation on it. */ ar->tx_power_2g_limit = 0; ar->tx_power_5g_limit = 0; /* note the power is in 0.25dbm unit, while ath10k uses * 0.5dbm unit. */ for (i = 0; i < sar->num_sub_specs; i++) { if (sub_specs->freq_range_index == 0) ar->tx_power_2g_limit = sub_specs->power / 2; else if (sub_specs->freq_range_index == 1) ar->tx_power_5g_limit = sub_specs->power / 2; sub_specs++; } ret = ath10k_mac_set_sar_power(ar); if (ret) { ath10k_warn(ar, "failed to set sar power: %d", ret); goto err; } err: mutex_unlock(&ar->conf_mutex); return ret; } /* can be called only in mac80211 callbacks due to `key_count` usage */ static void ath10k_bss_assoc(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_bss_conf *bss_conf) { struct ath10k *ar = hw->priv; struct ath10k_vif *arvif = (void *)vif->drv_priv; struct ieee80211_sta_ht_cap ht_cap; struct ieee80211_sta_vht_cap vht_cap; struct wmi_peer_assoc_complete_arg peer_arg; struct ieee80211_sta *ap_sta; int ret; lockdep_assert_held(&ar->conf_mutex); ath10k_dbg(ar, ATH10K_DBG_MAC, "mac vdev %i assoc bssid %pM aid %d\n", arvif->vdev_id, arvif->bssid, arvif->aid); rcu_read_lock(); ap_sta = ieee80211_find_sta(vif, bss_conf->bssid); if (!ap_sta) { ath10k_warn(ar, "failed to find station entry for bss %pM vdev %i\n", bss_conf->bssid, arvif->vdev_id); rcu_read_unlock(); return; } /* ap_sta must be accessed only within rcu section which must be left * before calling ath10k_setup_peer_smps() which might sleep. */ ht_cap = ap_sta->deflink.ht_cap; vht_cap = ap_sta->deflink.vht_cap; ret = ath10k_peer_assoc_prepare(ar, vif, ap_sta, &peer_arg); if (ret) { ath10k_warn(ar, "failed to prepare peer assoc for %pM vdev %i: %d\n", bss_conf->bssid, arvif->vdev_id, ret); rcu_read_unlock(); return; } rcu_read_unlock(); ret = ath10k_wmi_peer_assoc(ar, &peer_arg); if (ret) { ath10k_warn(ar, "failed to run peer assoc for %pM vdev %i: %d\n", bss_conf->bssid, arvif->vdev_id, ret); return; } ret = ath10k_setup_peer_smps(ar, arvif, bss_conf->bssid, &ht_cap); if (ret) { ath10k_warn(ar, "failed to setup peer SMPS for vdev %i: %d\n", arvif->vdev_id, ret); return; } ret = ath10k_mac_vif_recalc_txbf(ar, vif, vht_cap); if (ret) { ath10k_warn(ar, "failed to recalc txbf for vdev %i on bss %pM: %d\n", arvif->vdev_id, bss_conf->bssid, ret); return; } ath10k_dbg(ar, ATH10K_DBG_MAC, "mac vdev %d up (associated) bssid %pM aid %d\n", arvif->vdev_id, bss_conf->bssid, vif->cfg.aid); WARN_ON(arvif->is_up); arvif->aid = vif->cfg.aid; ether_addr_copy(arvif->bssid, bss_conf->bssid); ret = ath10k_wmi_pdev_set_param(ar, ar->wmi.pdev_param->peer_stats_info_enable, 1); if (ret) ath10k_warn(ar, "failed to enable peer stats info: %d\n", ret); ret = ath10k_wmi_vdev_up(ar, arvif->vdev_id, arvif->aid, arvif->bssid); if (ret) { ath10k_warn(ar, "failed to set vdev %d up: %d\n", arvif->vdev_id, ret); return; } arvif->is_up = true; ath10k_mac_set_sar_power(ar); /* Workaround: Some firmware revisions (tested with qca6174 * WLAN.RM.2.0-00073) have buggy powersave state machine and must be * poked with peer param command. */ ret = ath10k_wmi_peer_set_param(ar, arvif->vdev_id, arvif->bssid, ar->wmi.peer_param->dummy_var, 1); if (ret) { ath10k_warn(ar, "failed to poke peer %pM param for ps workaround on vdev %i: %d\n", arvif->bssid, arvif->vdev_id, ret); return; } } static void ath10k_bss_disassoc(struct ieee80211_hw *hw, struct ieee80211_vif *vif) { struct ath10k *ar = hw->priv; struct ath10k_vif *arvif = (void *)vif->drv_priv; struct ieee80211_sta_vht_cap vht_cap = {}; int ret; lockdep_assert_held(&ar->conf_mutex); ath10k_dbg(ar, ATH10K_DBG_MAC, "mac vdev %i disassoc bssid %pM\n", arvif->vdev_id, arvif->bssid); ret = ath10k_wmi_vdev_down(ar, arvif->vdev_id); if (ret) ath10k_warn(ar, "failed to down vdev %i: %d\n", arvif->vdev_id, ret); arvif->def_wep_key_idx = -1; ret = ath10k_mac_vif_recalc_txbf(ar, vif, vht_cap); if (ret) { ath10k_warn(ar, "failed to recalc txbf for vdev %i: %d\n", arvif->vdev_id, ret); return; } arvif->is_up = false; ath10k_mac_txpower_recalc(ar); cancel_delayed_work_sync(&arvif->connection_loss_work); } static int ath10k_new_peer_tid_config(struct ath10k *ar, struct ieee80211_sta *sta, struct ath10k_vif *arvif) { struct wmi_per_peer_per_tid_cfg_arg arg = {}; struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv; bool config_apply; int ret, i; for (i = 0; i < ATH10K_TID_MAX; i++) { config_apply = false; if (arvif->retry_long[i] || arvif->ampdu[i] || arvif->rate_ctrl[i] || arvif->rtscts[i]) { config_apply = true; arg.tid = i; arg.vdev_id = arvif->vdev_id; arg.retry_count = arvif->retry_long[i]; arg.aggr_control = arvif->ampdu[i]; arg.rate_ctrl = arvif->rate_ctrl[i]; arg.rcode_flags = arvif->rate_code[i]; if (arvif->rtscts[i]) arg.ext_tid_cfg_bitmap = WMI_EXT_TID_RTS_CTS_CONFIG; else arg.ext_tid_cfg_bitmap = 0; arg.rtscts_ctrl = arvif->rtscts[i]; } if (arvif->noack[i]) { arg.ack_policy = arvif->noack[i]; arg.rate_ctrl = WMI_TID_CONFIG_RATE_CONTROL_DEFAULT_LOWEST_RATE; arg.aggr_control = WMI_TID_CONFIG_AGGR_CONTROL_DISABLE; config_apply = true; } /* Assign default value(-1) to newly connected station. * This is to identify station specific tid configuration not * configured for the station. */ arsta->retry_long[i] = -1; arsta->noack[i] = -1; arsta->ampdu[i] = -1; if (!config_apply) continue; ether_addr_copy(arg.peer_macaddr.addr, sta->addr); ret = ath10k_wmi_set_per_peer_per_tid_cfg(ar, &arg); if (ret) { ath10k_warn(ar, "failed to set per tid retry/aggr config for sta %pM: %d\n", sta->addr, ret); return ret; } memset(&arg, 0, sizeof(arg)); } return 0; } static int ath10k_station_assoc(struct ath10k *ar, struct ieee80211_vif *vif, struct ieee80211_sta *sta, bool reassoc) { struct ath10k_vif *arvif = (void *)vif->drv_priv; struct wmi_peer_assoc_complete_arg peer_arg; int ret = 0; lockdep_assert_held(&ar->conf_mutex); ret = ath10k_peer_assoc_prepare(ar, vif, sta, &peer_arg); if (ret) { ath10k_warn(ar, "failed to prepare WMI peer assoc for %pM vdev %i: %i\n", sta->addr, arvif->vdev_id, ret); return ret; } ret = ath10k_wmi_peer_assoc(ar, &peer_arg); if (ret) { ath10k_warn(ar, "failed to run peer assoc for STA %pM vdev %i: %d\n", sta->addr, arvif->vdev_id, ret); return ret; } /* Re-assoc is run only to update supported rates for given station. It * doesn't make much sense to reconfigure the peer completely. */ if (!reassoc) { ret = ath10k_setup_peer_smps(ar, arvif, sta->addr, &sta->deflink.ht_cap); if (ret) { ath10k_warn(ar, "failed to setup peer SMPS for vdev %d: %d\n", arvif->vdev_id, ret); return ret; } ret = ath10k_peer_assoc_qos_ap(ar, arvif, sta); if (ret) { ath10k_warn(ar, "failed to set qos params for STA %pM for vdev %i: %d\n", sta->addr, arvif->vdev_id, ret); return ret; } if (!sta->wme) { arvif->num_legacy_stations++; ret = ath10k_recalc_rtscts_prot(arvif); if (ret) { ath10k_warn(ar, "failed to recalculate rts/cts prot for vdev %d: %d\n", arvif->vdev_id, ret); return ret; } } /* Plumb cached keys only for static WEP */ if ((arvif->def_wep_key_idx != -1) && (!sta->tdls)) { ret = ath10k_install_peer_wep_keys(arvif, sta->addr); if (ret) { ath10k_warn(ar, "failed to install peer wep keys for vdev %i: %d\n", arvif->vdev_id, ret); return ret; } } } if (!test_bit(WMI_SERVICE_PEER_TID_CONFIGS_SUPPORT, ar->wmi.svc_map)) return ret; return ath10k_new_peer_tid_config(ar, sta, arvif); } static int ath10k_station_disassoc(struct ath10k *ar, struct ieee80211_vif *vif, struct ieee80211_sta *sta) { struct ath10k_vif *arvif = (void *)vif->drv_priv; int ret = 0; lockdep_assert_held(&ar->conf_mutex); if (!sta->wme) { arvif->num_legacy_stations--; ret = ath10k_recalc_rtscts_prot(arvif); if (ret) { ath10k_warn(ar, "failed to recalculate rts/cts prot for vdev %d: %d\n", arvif->vdev_id, ret); return ret; } } ret = ath10k_clear_peer_keys(arvif, sta->addr); if (ret) { ath10k_warn(ar, "failed to clear all peer wep keys for vdev %i: %d\n", arvif->vdev_id, ret); return ret; } return ret; } /**************/ /* Regulatory */ /**************/ static int ath10k_update_channel_list(struct ath10k *ar) { struct ieee80211_hw *hw = ar->hw; struct ieee80211_supported_band **bands; enum nl80211_band band; struct ieee80211_channel *channel; struct wmi_scan_chan_list_arg arg = {}; struct wmi_channel_arg *ch; bool passive; int len; int ret; int i; lockdep_assert_held(&ar->conf_mutex); bands = hw->wiphy->bands; for (band = 0; band < NUM_NL80211_BANDS; band++) { if (!bands[band]) continue; for (i = 0; i < bands[band]->n_channels; i++) { if (bands[band]->channels[i].flags & IEEE80211_CHAN_DISABLED) continue; arg.n_channels++; } } len = sizeof(struct wmi_channel_arg) * arg.n_channels; arg.channels = kzalloc(len, GFP_KERNEL); if (!arg.channels) return -ENOMEM; ch = arg.channels; for (band = 0; band < NUM_NL80211_BANDS; band++) { if (!bands[band]) continue; for (i = 0; i < bands[band]->n_channels; i++) { channel = &bands[band]->channels[i]; if (channel->flags & IEEE80211_CHAN_DISABLED) continue; ch->allow_ht = true; /* FIXME: when should we really allow VHT? */ ch->allow_vht = true; ch->allow_ibss = !(channel->flags & IEEE80211_CHAN_NO_IR); ch->ht40plus = !(channel->flags & IEEE80211_CHAN_NO_HT40PLUS); ch->chan_radar = !!(channel->flags & IEEE80211_CHAN_RADAR); passive = channel->flags & IEEE80211_CHAN_NO_IR; ch->passive = passive; /* the firmware is ignoring the "radar" flag of the * channel and is scanning actively using Probe Requests * on "Radar detection"/DFS channels which are not * marked as "available" */ ch->passive |= ch->chan_radar; ch->freq = channel->center_freq; ch->band_center_freq1 = channel->center_freq; ch->min_power = 0; ch->max_power = channel->max_power * 2; ch->max_reg_power = channel->max_reg_power * 2; ch->max_antenna_gain = channel->max_antenna_gain; ch->reg_class_id = 0; /* FIXME */ /* FIXME: why use only legacy modes, why not any * HT/VHT modes? Would that even make any * difference? */ if (channel->band == NL80211_BAND_2GHZ) ch->mode = MODE_11G; else ch->mode = MODE_11A; if (WARN_ON_ONCE(ch->mode == MODE_UNKNOWN)) continue; ath10k_dbg(ar, ATH10K_DBG_WMI, "mac channel [%zd/%d] freq %d maxpower %d regpower %d antenna %d mode %d\n", ch - arg.channels, arg.n_channels, ch->freq, ch->max_power, ch->max_reg_power, ch->max_antenna_gain, ch->mode); ch++; } } ret = ath10k_wmi_scan_chan_list(ar, &arg); kfree(arg.channels); return ret; } static enum wmi_dfs_region ath10k_mac_get_dfs_region(enum nl80211_dfs_regions dfs_region) { switch (dfs_region) { case NL80211_DFS_UNSET: return WMI_UNINIT_DFS_DOMAIN; case NL80211_DFS_FCC: return WMI_FCC_DFS_DOMAIN; case NL80211_DFS_ETSI: return WMI_ETSI_DFS_DOMAIN; case NL80211_DFS_JP: return WMI_MKK4_DFS_DOMAIN; } return WMI_UNINIT_DFS_DOMAIN; } static void ath10k_regd_update(struct ath10k *ar) { struct reg_dmn_pair_mapping *regpair; int ret; enum wmi_dfs_region wmi_dfs_reg; enum nl80211_dfs_regions nl_dfs_reg; lockdep_assert_held(&ar->conf_mutex); ret = ath10k_update_channel_list(ar); if (ret) ath10k_warn(ar, "failed to update channel list: %d\n", ret); regpair = ar->ath_common.regulatory.regpair; if (IS_ENABLED(CONFIG_ATH10K_DFS_CERTIFIED) && ar->dfs_detector) { nl_dfs_reg = ar->dfs_detector->region; wmi_dfs_reg = ath10k_mac_get_dfs_region(nl_dfs_reg); } else { wmi_dfs_reg = WMI_UNINIT_DFS_DOMAIN; } /* Target allows setting up per-band regdomain but ath_common provides * a combined one only */ ret = ath10k_wmi_pdev_set_regdomain(ar, regpair->reg_domain, regpair->reg_domain, /* 2ghz */ regpair->reg_domain, /* 5ghz */ regpair->reg_2ghz_ctl, regpair->reg_5ghz_ctl, wmi_dfs_reg); if (ret) ath10k_warn(ar, "failed to set pdev regdomain: %d\n", ret); } static void ath10k_mac_update_channel_list(struct ath10k *ar, struct ieee80211_supported_band *band) { int i; if (ar->low_5ghz_chan && ar->high_5ghz_chan) { for (i = 0; i < band->n_channels; i++) { if (band->channels[i].center_freq < ar->low_5ghz_chan || band->channels[i].center_freq > ar->high_5ghz_chan) band->channels[i].flags |= IEEE80211_CHAN_DISABLED; } } } static void ath10k_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request) { struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy); struct ath10k *ar = hw->priv; bool result; ath_reg_notifier_apply(wiphy, request, &ar->ath_common.regulatory); if (IS_ENABLED(CONFIG_ATH10K_DFS_CERTIFIED) && ar->dfs_detector) { ath10k_dbg(ar, ATH10K_DBG_REGULATORY, "dfs region 0x%x\n", request->dfs_region); result = ar->dfs_detector->set_dfs_domain(ar->dfs_detector, request->dfs_region); if (!result) ath10k_warn(ar, "DFS region 0x%X not supported, will trigger radar for every pulse\n", request->dfs_region); } mutex_lock(&ar->conf_mutex); if (ar->state == ATH10K_STATE_ON) ath10k_regd_update(ar); mutex_unlock(&ar->conf_mutex); if (ar->phy_capability & WHAL_WLAN_11A_CAPABILITY) ath10k_mac_update_channel_list(ar, ar->hw->wiphy->bands[NL80211_BAND_5GHZ]); } static void ath10k_stop_radar_confirmation(struct ath10k *ar) { spin_lock_bh(&ar->data_lock); ar->radar_conf_state = ATH10K_RADAR_CONFIRMATION_STOPPED; spin_unlock_bh(&ar->data_lock); cancel_work_sync(&ar->radar_confirmation_work); } /***************/ /* TX handlers */ /***************/ enum ath10k_mac_tx_path { ATH10K_MAC_TX_HTT, ATH10K_MAC_TX_HTT_MGMT, ATH10K_MAC_TX_WMI_MGMT, ATH10K_MAC_TX_UNKNOWN, }; void ath10k_mac_tx_lock(struct ath10k *ar, int reason) { lockdep_assert_held(&ar->htt.tx_lock); WARN_ON(reason >= ATH10K_TX_PAUSE_MAX); ar->tx_paused |= BIT(reason); ieee80211_stop_queues(ar->hw); } static void ath10k_mac_tx_unlock_iter(void *data, u8 *mac, struct ieee80211_vif *vif) { struct ath10k *ar = data; struct ath10k_vif *arvif = (void *)vif->drv_priv; if (arvif->tx_paused) return; ieee80211_wake_queue(ar->hw, arvif->vdev_id); } void ath10k_mac_tx_unlock(struct ath10k *ar, int reason) { lockdep_assert_held(&ar->htt.tx_lock); WARN_ON(reason >= ATH10K_TX_PAUSE_MAX); ar->tx_paused &= ~BIT(reason); if (ar->tx_paused) return; ieee80211_iterate_active_interfaces_atomic(ar->hw, ATH10K_ITER_RESUME_FLAGS, ath10k_mac_tx_unlock_iter, ar); ieee80211_wake_queue(ar->hw, ar->hw->offchannel_tx_hw_queue); } void ath10k_mac_vif_tx_lock(struct ath10k_vif *arvif, int reason) { struct ath10k *ar = arvif->ar; lockdep_assert_held(&ar->htt.tx_lock); WARN_ON(reason >= BITS_PER_LONG); arvif->tx_paused |= BIT(reason); ieee80211_stop_queue(ar->hw, arvif->vdev_id); } void ath10k_mac_vif_tx_unlock(struct ath10k_vif *arvif, int reason) { struct ath10k *ar = arvif->ar; lockdep_assert_held(&ar->htt.tx_lock); WARN_ON(reason >= BITS_PER_LONG); arvif->tx_paused &= ~BIT(reason); if (ar->tx_paused) return; if (arvif->tx_paused) return; ieee80211_wake_queue(ar->hw, arvif->vdev_id); } static void ath10k_mac_vif_handle_tx_pause(struct ath10k_vif *arvif, enum wmi_tlv_tx_pause_id pause_id, enum wmi_tlv_tx_pause_action action) { struct ath10k *ar = arvif->ar; lockdep_assert_held(&ar->htt.tx_lock); switch (action) { case WMI_TLV_TX_PAUSE_ACTION_STOP: ath10k_mac_vif_tx_lock(arvif, pause_id); break; case WMI_TLV_TX_PAUSE_ACTION_WAKE: ath10k_mac_vif_tx_unlock(arvif, pause_id); break; default: ath10k_dbg(ar, ATH10K_DBG_BOOT, "received unknown tx pause action %d on vdev %i, ignoring\n", action, arvif->vdev_id); break; } } struct ath10k_mac_tx_pause { u32 vdev_id; enum wmi_tlv_tx_pause_id pause_id; enum wmi_tlv_tx_pause_action action; }; static void ath10k_mac_handle_tx_pause_iter(void *data, u8 *mac, struct ieee80211_vif *vif) { struct ath10k_vif *arvif = (void *)vif->drv_priv; struct ath10k_mac_tx_pause *arg = data; if (arvif->vdev_id != arg->vdev_id) return; ath10k_mac_vif_handle_tx_pause(arvif, arg->pause_id, arg->action); } void ath10k_mac_handle_tx_pause_vdev(struct ath10k *ar, u32 vdev_id, enum wmi_tlv_tx_pause_id pause_id, enum wmi_tlv_tx_pause_action action) { struct ath10k_mac_tx_pause arg = { .vdev_id = vdev_id, .pause_id = pause_id, .action = action, }; spin_lock_bh(&ar->htt.tx_lock); ieee80211_iterate_active_interfaces_atomic(ar->hw, ATH10K_ITER_RESUME_FLAGS, ath10k_mac_handle_tx_pause_iter, &arg); spin_unlock_bh(&ar->htt.tx_lock); } static enum ath10k_hw_txrx_mode ath10k_mac_tx_h_get_txmode(struct ath10k *ar, struct ieee80211_vif *vif, struct ieee80211_sta *sta, struct sk_buff *skb) { const struct ieee80211_hdr *hdr = (void *)skb->data; const struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb); __le16 fc = hdr->frame_control; if (IEEE80211_SKB_CB(skb)->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) return ATH10K_HW_TXRX_ETHERNET; if (!vif || vif->type == NL80211_IFTYPE_MONITOR) return ATH10K_HW_TXRX_RAW; if (ieee80211_is_mgmt(fc)) return ATH10K_HW_TXRX_MGMT; /* Workaround: * * NullFunc frames are mostly used to ping if a client or AP are still * reachable and responsive. This implies tx status reports must be * accurate - otherwise either mac80211 or userspace (e.g. hostapd) can * come to a conclusion that the other end disappeared and tear down * BSS connection or it can never disconnect from BSS/client (which is * the case). * * Firmware with HTT older than 3.0 delivers incorrect tx status for * NullFunc frames to driver. However there's a HTT Mgmt Tx command * which seems to deliver correct tx reports for NullFunc frames. The * downside of using it is it ignores client powersave state so it can * end up disconnecting sleeping clients in AP mode. It should fix STA * mode though because AP don't sleep. */ if (ar->htt.target_version_major < 3 && (ieee80211_is_nullfunc(fc) || ieee80211_is_qos_nullfunc(fc)) && !test_bit(ATH10K_FW_FEATURE_HAS_WMI_MGMT_TX, ar->running_fw->fw_file.fw_features)) return ATH10K_HW_TXRX_MGMT; /* Workaround: * * Some wmi-tlv firmwares for qca6174 have broken Tx key selection for * NativeWifi txmode - it selects AP key instead of peer key. It seems * to work with Ethernet txmode so use it. * * FIXME: Check if raw mode works with TDLS. */ if (ieee80211_is_data_present(fc) && sta && sta->tdls) return ATH10K_HW_TXRX_ETHERNET; if (test_bit(ATH10K_FLAG_RAW_MODE, &ar->dev_flags) || skb_cb->flags & ATH10K_SKB_F_RAW_TX) return ATH10K_HW_TXRX_RAW; return ATH10K_HW_TXRX_NATIVE_WIFI; } static bool ath10k_tx_h_use_hwcrypto(struct ieee80211_vif *vif, struct sk_buff *skb) { const struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); const struct ieee80211_hdr *hdr = (void *)skb->data; const u32 mask = IEEE80211_TX_INTFL_DONT_ENCRYPT | IEEE80211_TX_CTL_INJECTED; if (!ieee80211_has_protected(hdr->frame_control)) return false; if ((info->flags & mask) == mask) return false; if (vif) return !((struct ath10k_vif *)vif->drv_priv)->nohwcrypt; return true; } /* HTT Tx uses Native Wifi tx mode which expects 802.11 frames without QoS * Control in the header. */ static void ath10k_tx_h_nwifi(struct ieee80211_hw *hw, struct sk_buff *skb) { struct ieee80211_hdr *hdr = (void *)skb->data; struct ath10k_skb_cb *cb = ATH10K_SKB_CB(skb); u8 *qos_ctl; if (!ieee80211_is_data_qos(hdr->frame_control)) return; qos_ctl = ieee80211_get_qos_ctl(hdr); memmove(skb->data + IEEE80211_QOS_CTL_LEN, skb->data, (void *)qos_ctl - (void *)skb->data); skb_pull(skb, IEEE80211_QOS_CTL_LEN); /* Some firmware revisions don't handle sending QoS NullFunc well. * These frames are mainly used for CQM purposes so it doesn't really * matter whether QoS NullFunc or NullFunc are sent. */ hdr = (void *)skb->data; if (ieee80211_is_qos_nullfunc(hdr->frame_control)) cb->flags &= ~ATH10K_SKB_F_QOS; hdr->frame_control &= ~__cpu_to_le16(IEEE80211_STYPE_QOS_DATA); } static void ath10k_tx_h_8023(struct sk_buff *skb) { struct ieee80211_hdr *hdr; struct rfc1042_hdr *rfc1042; struct ethhdr *eth; size_t hdrlen; u8 da[ETH_ALEN]; u8 sa[ETH_ALEN]; __be16 type; hdr = (void *)skb->data; hdrlen = ieee80211_hdrlen(hdr->frame_control); rfc1042 = (void *)skb->data + hdrlen; ether_addr_copy(da, ieee80211_get_DA(hdr)); ether_addr_copy(sa, ieee80211_get_SA(hdr)); type = rfc1042->snap_type; skb_pull(skb, hdrlen + sizeof(*rfc1042)); skb_push(skb, sizeof(*eth)); eth = (void *)skb->data; ether_addr_copy(eth->h_dest, da); ether_addr_copy(eth->h_source, sa); eth->h_proto = type; } static void ath10k_tx_h_add_p2p_noa_ie(struct ath10k *ar, struct ieee80211_vif *vif, struct sk_buff *skb) { struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; struct ath10k_vif *arvif = (void *)vif->drv_priv; /* This is case only for P2P_GO */ if (vif->type != NL80211_IFTYPE_AP || !vif->p2p) return; if (unlikely(ieee80211_is_probe_resp(hdr->frame_control))) { spin_lock_bh(&ar->data_lock); if (arvif->u.ap.noa_data) if (!pskb_expand_head(skb, 0, arvif->u.ap.noa_len, GFP_ATOMIC)) skb_put_data(skb, arvif->u.ap.noa_data, arvif->u.ap.noa_len); spin_unlock_bh(&ar->data_lock); } } static void ath10k_mac_tx_h_fill_cb(struct ath10k *ar, struct ieee80211_vif *vif, struct ieee80211_txq *txq, struct ieee80211_sta *sta, struct sk_buff *skb, u16 airtime) { struct ieee80211_hdr *hdr = (void *)skb->data; struct ath10k_skb_cb *cb = ATH10K_SKB_CB(skb); const struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); bool is_data = ieee80211_is_data(hdr->frame_control) || ieee80211_is_data_qos(hdr->frame_control); struct ath10k_vif *arvif = (void *)vif->drv_priv; struct ath10k_sta *arsta; u8 tid, *qos_ctl; bool noack = false; cb->flags = 0; if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) { cb->flags |= ATH10K_SKB_F_QOS; /* Assume data frames are QoS */ goto finish_cb_fill; } if (!ath10k_tx_h_use_hwcrypto(vif, skb)) cb->flags |= ATH10K_SKB_F_NO_HWCRYPT; if (ieee80211_is_mgmt(hdr->frame_control)) cb->flags |= ATH10K_SKB_F_MGMT; if (ieee80211_is_data_qos(hdr->frame_control)) { cb->flags |= ATH10K_SKB_F_QOS; qos_ctl = ieee80211_get_qos_ctl(hdr); tid = (*qos_ctl) & IEEE80211_QOS_CTL_TID_MASK; if (arvif->noack[tid] == WMI_PEER_TID_CONFIG_NOACK) noack = true; if (sta) { arsta = (struct ath10k_sta *)sta->drv_priv; if (arsta->noack[tid] == WMI_PEER_TID_CONFIG_NOACK) noack = true; if (arsta->noack[tid] == WMI_PEER_TID_CONFIG_ACK) noack = false; } if (noack) cb->flags |= ATH10K_SKB_F_NOACK_TID; } /* Data frames encrypted in software will be posted to firmware * with tx encap mode set to RAW. Ex: Multicast traffic generated * for a specific VLAN group will always be encrypted in software. */ if (is_data && ieee80211_has_protected(hdr->frame_control) && !info->control.hw_key) { cb->flags |= ATH10K_SKB_F_NO_HWCRYPT; cb->flags |= ATH10K_SKB_F_RAW_TX; } finish_cb_fill: cb->vif = vif; cb->txq = txq; cb->airtime_est = airtime; if (sta) { arsta = (struct ath10k_sta *)sta->drv_priv; spin_lock_bh(&ar->data_lock); cb->ucast_cipher = arsta->ucast_cipher; spin_unlock_bh(&ar->data_lock); } } bool ath10k_mac_tx_frm_has_freq(struct ath10k *ar) { /* FIXME: Not really sure since when the behaviour changed. At some * point new firmware stopped requiring creation of peer entries for * offchannel tx (and actually creating them causes issues with wmi-htc * tx credit replenishment and reliability). Assuming it's at least 3.4 * because that's when the `freq` was introduced to TX_FRM HTT command. */ return (ar->htt.target_version_major >= 3 && ar->htt.target_version_minor >= 4 && ar->running_fw->fw_file.htt_op_version == ATH10K_FW_HTT_OP_VERSION_TLV); } static int ath10k_mac_tx_wmi_mgmt(struct ath10k *ar, struct sk_buff *skb) { struct sk_buff_head *q = &ar->wmi_mgmt_tx_queue; if (skb_queue_len_lockless(q) >= ATH10K_MAX_NUM_MGMT_PENDING) { ath10k_warn(ar, "wmi mgmt tx queue is full\n"); return -ENOSPC; } skb_queue_tail(q, skb); ieee80211_queue_work(ar->hw, &ar->wmi_mgmt_tx_work); return 0; } static enum ath10k_mac_tx_path ath10k_mac_tx_h_get_txpath(struct ath10k *ar, struct sk_buff *skb, enum ath10k_hw_txrx_mode txmode) { switch (txmode) { case ATH10K_HW_TXRX_RAW: case ATH10K_HW_TXRX_NATIVE_WIFI: case ATH10K_HW_TXRX_ETHERNET: return ATH10K_MAC_TX_HTT; case ATH10K_HW_TXRX_MGMT: if (test_bit(ATH10K_FW_FEATURE_HAS_WMI_MGMT_TX, ar->running_fw->fw_file.fw_features) || test_bit(WMI_SERVICE_MGMT_TX_WMI, ar->wmi.svc_map)) return ATH10K_MAC_TX_WMI_MGMT; else if (ar->htt.target_version_major >= 3) return ATH10K_MAC_TX_HTT; else return ATH10K_MAC_TX_HTT_MGMT; } return ATH10K_MAC_TX_UNKNOWN; } static int ath10k_mac_tx_submit(struct ath10k *ar, enum ath10k_hw_txrx_mode txmode, enum ath10k_mac_tx_path txpath, struct sk_buff *skb) { struct ath10k_htt *htt = &ar->htt; int ret = -EINVAL; switch (txpath) { case ATH10K_MAC_TX_HTT: ret = ath10k_htt_tx(htt, txmode, skb); break; case ATH10K_MAC_TX_HTT_MGMT: ret = ath10k_htt_mgmt_tx(htt, skb); break; case ATH10K_MAC_TX_WMI_MGMT: ret = ath10k_mac_tx_wmi_mgmt(ar, skb); break; case ATH10K_MAC_TX_UNKNOWN: WARN_ON_ONCE(1); ret = -EINVAL; break; } if (ret) { ath10k_warn(ar, "failed to transmit packet, dropping: %d\n", ret); ieee80211_free_txskb(ar->hw, skb); } return ret; } /* This function consumes the sk_buff regardless of return value as far as * caller is concerned so no freeing is necessary afterwards. */ static int ath10k_mac_tx(struct ath10k *ar, struct ieee80211_vif *vif, enum ath10k_hw_txrx_mode txmode, enum ath10k_mac_tx_path txpath, struct sk_buff *skb, bool noque_offchan) { struct ieee80211_hw *hw = ar->hw; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); const struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb); int ret; /* We should disable CCK RATE due to P2P */ if (info->flags & IEEE80211_TX_CTL_NO_CCK_RATE) ath10k_dbg(ar, ATH10K_DBG_MAC, "IEEE80211_TX_CTL_NO_CCK_RATE\n"); switch (txmode) { case ATH10K_HW_TXRX_MGMT: case ATH10K_HW_TXRX_NATIVE_WIFI: ath10k_tx_h_nwifi(hw, skb); ath10k_tx_h_add_p2p_noa_ie(ar, vif, skb); ath10k_tx_h_seq_no(vif, skb); break; case ATH10K_HW_TXRX_ETHERNET: /* Convert 802.11->802.3 header only if the frame was earlier * encapsulated to 802.11 by mac80211. Otherwise pass it as is. */ if (!(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)) ath10k_tx_h_8023(skb); break; case ATH10K_HW_TXRX_RAW: if (!test_bit(ATH10K_FLAG_RAW_MODE, &ar->dev_flags) && !(skb_cb->flags & ATH10K_SKB_F_RAW_TX)) { WARN_ON_ONCE(1); ieee80211_free_txskb(hw, skb); return -EOPNOTSUPP; } } if (!noque_offchan && info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) { if (!ath10k_mac_tx_frm_has_freq(ar)) { ath10k_dbg(ar, ATH10K_DBG_MAC, "mac queued offchannel skb %p len %d\n", skb, skb->len); skb_queue_tail(&ar->offchan_tx_queue, skb); ieee80211_queue_work(hw, &ar->offchan_tx_work); return 0; } } ret = ath10k_mac_tx_submit(ar, txmode, txpath, skb); if (ret) { ath10k_warn(ar, "failed to submit frame: %d\n", ret); return ret; } return 0; } void ath10k_offchan_tx_purge(struct ath10k *ar) { struct sk_buff *skb; for (;;) { skb = skb_dequeue(&ar->offchan_tx_queue); if (!skb) break; ieee80211_free_txskb(ar->hw, skb); } } void ath10k_offchan_tx_work(struct work_struct *work) { struct ath10k *ar = container_of(work, struct ath10k, offchan_tx_work); struct ath10k_peer *peer; struct ath10k_vif *arvif; enum ath10k_hw_txrx_mode txmode; enum ath10k_mac_tx_path txpath; struct ieee80211_hdr *hdr; struct ieee80211_vif *vif; struct ieee80211_sta *sta; struct sk_buff *skb; const u8 *peer_addr; int vdev_id; int ret; unsigned long time_left; bool tmp_peer_created = false; /* FW requirement: We must create a peer before FW will send out * an offchannel frame. Otherwise the frame will be stuck and * never transmitted. We delete the peer upon tx completion. * It is unlikely that a peer for offchannel tx will already be * present. However it may be in some rare cases so account for that. * Otherwise we might remove a legitimate peer and break stuff. */ for (;;) { skb = skb_dequeue(&ar->offchan_tx_queue); if (!skb) break; mutex_lock(&ar->conf_mutex); ath10k_dbg(ar, ATH10K_DBG_MAC, "mac offchannel skb %p len %d\n", skb, skb->len); hdr = (struct ieee80211_hdr *)skb->data; peer_addr = ieee80211_get_DA(hdr); spin_lock_bh(&ar->data_lock); vdev_id = ar->scan.vdev_id; peer = ath10k_peer_find(ar, vdev_id, peer_addr); spin_unlock_bh(&ar->data_lock); if (peer) { ath10k_warn(ar, "peer %pM on vdev %d already present\n", peer_addr, vdev_id); } else { ret = ath10k_peer_create(ar, NULL, NULL, vdev_id, peer_addr, WMI_PEER_TYPE_DEFAULT); if (ret) ath10k_warn(ar, "failed to create peer %pM on vdev %d: %d\n", peer_addr, vdev_id, ret); tmp_peer_created = (ret == 0); } spin_lock_bh(&ar->data_lock); reinit_completion(&ar->offchan_tx_completed); ar->offchan_tx_skb = skb; spin_unlock_bh(&ar->data_lock); /* It's safe to access vif and sta - conf_mutex guarantees that * sta_state() and remove_interface() are locked exclusively * out wrt to this offchannel worker. */ arvif = ath10k_get_arvif(ar, vdev_id); if (arvif) { vif = arvif->vif; sta = ieee80211_find_sta(vif, peer_addr); } else { vif = NULL; sta = NULL; } txmode = ath10k_mac_tx_h_get_txmode(ar, vif, sta, skb); txpath = ath10k_mac_tx_h_get_txpath(ar, skb, txmode); ret = ath10k_mac_tx(ar, vif, txmode, txpath, skb, true); if (ret) { ath10k_warn(ar, "failed to transmit offchannel frame: %d\n", ret); /* not serious */ } time_left = wait_for_completion_timeout(&ar->offchan_tx_completed, 3 * HZ); if (time_left == 0) ath10k_warn(ar, "timed out waiting for offchannel skb %p, len: %d\n", skb, skb->len); if (!peer && tmp_peer_created) { ret = ath10k_peer_delete(ar, vdev_id, peer_addr); if (ret) ath10k_warn(ar, "failed to delete peer %pM on vdev %d: %d\n", peer_addr, vdev_id, ret); } mutex_unlock(&ar->conf_mutex); } } void ath10k_mgmt_over_wmi_tx_purge(struct ath10k *ar) { struct sk_buff *skb; for (;;) { skb = skb_dequeue(&ar->wmi_mgmt_tx_queue); if (!skb) break; ieee80211_free_txskb(ar->hw, skb); } } void ath10k_mgmt_over_wmi_tx_work(struct work_struct *work) { struct ath10k *ar = container_of(work, struct ath10k, wmi_mgmt_tx_work); struct sk_buff *skb; dma_addr_t paddr; int ret; for (;;) { skb = skb_dequeue(&ar->wmi_mgmt_tx_queue); if (!skb) break; if (test_bit(ATH10K_FW_FEATURE_MGMT_TX_BY_REF, ar->running_fw->fw_file.fw_features)) { paddr = dma_map_single(ar->dev, skb->data, skb->len, DMA_TO_DEVICE); if (dma_mapping_error(ar->dev, paddr)) { ieee80211_free_txskb(ar->hw, skb); continue; } ret = ath10k_wmi_mgmt_tx_send(ar, skb, paddr); if (ret) { ath10k_warn(ar, "failed to transmit management frame by ref via WMI: %d\n", ret); /* remove this msdu from idr tracking */ ath10k_wmi_cleanup_mgmt_tx_send(ar, skb); dma_unmap_single(ar->dev, paddr, skb->len, DMA_TO_DEVICE); ieee80211_free_txskb(ar->hw, skb); } } else { ret = ath10k_wmi_mgmt_tx(ar, skb); if (ret) { ath10k_warn(ar, "failed to transmit management frame via WMI: %d\n", ret); ieee80211_free_txskb(ar->hw, skb); } } } } static void ath10k_mac_txq_init(struct ieee80211_txq *txq) { struct ath10k_txq *artxq; if (!txq) return; artxq = (void *)txq->drv_priv; INIT_LIST_HEAD(&artxq->list); } static void ath10k_mac_txq_unref(struct ath10k *ar, struct ieee80211_txq *txq) { struct ath10k_skb_cb *cb; struct sk_buff *msdu; int msdu_id; if (!txq) return; spin_lock_bh(&ar->htt.tx_lock); idr_for_each_entry(&ar->htt.pending_tx, msdu, msdu_id) { cb = ATH10K_SKB_CB(msdu); if (cb->txq == txq) cb->txq = NULL; } spin_unlock_bh(&ar->htt.tx_lock); } struct ieee80211_txq *ath10k_mac_txq_lookup(struct ath10k *ar, u16 peer_id, u8 tid) { struct ath10k_peer *peer; lockdep_assert_held(&ar->data_lock); peer = ar->peer_map[peer_id]; if (!peer) return NULL; if (peer->removed) return NULL; if (peer->sta) return peer->sta->txq[tid]; else if (peer->vif) return peer->vif->txq; else return NULL; } static bool ath10k_mac_tx_can_push(struct ieee80211_hw *hw, struct ieee80211_txq *txq) { struct ath10k *ar = hw->priv; struct ath10k_txq *artxq = (void *)txq->drv_priv; /* No need to get locks */ if (ar->htt.tx_q_state.mode == HTT_TX_MODE_SWITCH_PUSH) return true; if (ar->htt.num_pending_tx < ar->htt.tx_q_state.num_push_allowed) return true; if (artxq->num_fw_queued < artxq->num_push_allowed) return true; return false; } /* Return estimated airtime in microsecond, which is calculated using last * reported TX rate. This is just a rough estimation because host driver has no * knowledge of the actual transmit rate, retries or aggregation. If actual * airtime can be reported by firmware, then delta between estimated and actual * airtime can be adjusted from deficit. */ #define IEEE80211_ATF_OVERHEAD 100 /* IFS + some slot time */ #define IEEE80211_ATF_OVERHEAD_IFS 16 /* IFS only */ static u16 ath10k_mac_update_airtime(struct ath10k *ar, struct ieee80211_txq *txq, struct sk_buff *skb) { struct ath10k_sta *arsta; u32 pktlen; u16 airtime = 0; if (!txq || !txq->sta) return airtime; if (test_bit(WMI_SERVICE_REPORT_AIRTIME, ar->wmi.svc_map)) return airtime; spin_lock_bh(&ar->data_lock); arsta = (struct ath10k_sta *)txq->sta->drv_priv; pktlen = skb->len + 38; /* Assume MAC header 30, SNAP 8 for most case */ if (arsta->last_tx_bitrate) { /* airtime in us, last_tx_bitrate in 100kbps */ airtime = (pktlen * 8 * (1000 / 100)) / arsta->last_tx_bitrate; /* overhead for media access time and IFS */ airtime += IEEE80211_ATF_OVERHEAD_IFS; } else { /* This is mostly for throttle excessive BC/MC frames, and the * airtime/rate doesn't need be exact. Airtime of BC/MC frames * in 2G get some discount, which helps prevent very low rate * frames from being blocked for too long. */ airtime = (pktlen * 8 * (1000 / 100)) / 60; /* 6M */ airtime += IEEE80211_ATF_OVERHEAD; } spin_unlock_bh(&ar->data_lock); return airtime; } int ath10k_mac_tx_push_txq(struct ieee80211_hw *hw, struct ieee80211_txq *txq) { struct ath10k *ar = hw->priv; struct ath10k_htt *htt = &ar->htt; struct ath10k_txq *artxq = (void *)txq->drv_priv; struct ieee80211_vif *vif = txq->vif; struct ieee80211_sta *sta = txq->sta; enum ath10k_hw_txrx_mode txmode; enum ath10k_mac_tx_path txpath; struct sk_buff *skb; struct ieee80211_hdr *hdr; size_t skb_len; bool is_mgmt, is_presp; int ret; u16 airtime; spin_lock_bh(&ar->htt.tx_lock); ret = ath10k_htt_tx_inc_pending(htt); spin_unlock_bh(&ar->htt.tx_lock); if (ret) return ret; skb = ieee80211_tx_dequeue_ni(hw, txq); if (!skb) { spin_lock_bh(&ar->htt.tx_lock); ath10k_htt_tx_dec_pending(htt); spin_unlock_bh(&ar->htt.tx_lock); return -ENOENT; } airtime = ath10k_mac_update_airtime(ar, txq, skb); ath10k_mac_tx_h_fill_cb(ar, vif, txq, sta, skb, airtime); skb_len = skb->len; txmode = ath10k_mac_tx_h_get_txmode(ar, vif, sta, skb); txpath = ath10k_mac_tx_h_get_txpath(ar, skb, txmode); is_mgmt = (txpath == ATH10K_MAC_TX_HTT_MGMT); if (is_mgmt) { hdr = (struct ieee80211_hdr *)skb->data; is_presp = ieee80211_is_probe_resp(hdr->frame_control); spin_lock_bh(&ar->htt.tx_lock); ret = ath10k_htt_tx_mgmt_inc_pending(htt, is_mgmt, is_presp); if (ret) { ath10k_htt_tx_dec_pending(htt); spin_unlock_bh(&ar->htt.tx_lock); return ret; } spin_unlock_bh(&ar->htt.tx_lock); } ret = ath10k_mac_tx(ar, vif, txmode, txpath, skb, false); if (unlikely(ret)) { ath10k_warn(ar, "failed to push frame: %d\n", ret); spin_lock_bh(&ar->htt.tx_lock); ath10k_htt_tx_dec_pending(htt); if (is_mgmt) ath10k_htt_tx_mgmt_dec_pending(htt); spin_unlock_bh(&ar->htt.tx_lock); return ret; } spin_lock_bh(&ar->htt.tx_lock); artxq->num_fw_queued++; spin_unlock_bh(&ar->htt.tx_lock); return skb_len; } static int ath10k_mac_schedule_txq(struct ieee80211_hw *hw, u32 ac) { struct ieee80211_txq *txq; int ret = 0; ieee80211_txq_schedule_start(hw, ac); while ((txq = ieee80211_next_txq(hw, ac))) { while (ath10k_mac_tx_can_push(hw, txq)) { ret = ath10k_mac_tx_push_txq(hw, txq); if (ret < 0) break; } ieee80211_return_txq(hw, txq, false); ath10k_htt_tx_txq_update(hw, txq); if (ret == -EBUSY) break; } ieee80211_txq_schedule_end(hw, ac); return ret; } void ath10k_mac_tx_push_pending(struct ath10k *ar) { struct ieee80211_hw *hw = ar->hw; u32 ac; if (ar->htt.tx_q_state.mode != HTT_TX_MODE_SWITCH_PUSH) return; if (ar->htt.num_pending_tx >= (ar->htt.max_num_pending_tx / 2)) return; rcu_read_lock(); for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { if (ath10k_mac_schedule_txq(hw, ac) == -EBUSY) break; } rcu_read_unlock(); } EXPORT_SYMBOL(ath10k_mac_tx_push_pending); /************/ /* Scanning */ /************/ void __ath10k_scan_finish(struct ath10k *ar) { lockdep_assert_held(&ar->data_lock); switch (ar->scan.state) { case ATH10K_SCAN_IDLE: break; case ATH10K_SCAN_RUNNING: case ATH10K_SCAN_ABORTING: if (ar->scan.is_roc && ar->scan.roc_notify) ieee80211_remain_on_channel_expired(ar->hw); fallthrough; case ATH10K_SCAN_STARTING: if (!ar->scan.is_roc) { struct cfg80211_scan_info info = { .aborted = ((ar->scan.state == ATH10K_SCAN_ABORTING) || (ar->scan.state == ATH10K_SCAN_STARTING)), }; ieee80211_scan_completed(ar->hw, &info); } ar->scan.state = ATH10K_SCAN_IDLE; ar->scan_channel = NULL; ar->scan.roc_freq = 0; ath10k_offchan_tx_purge(ar); cancel_delayed_work(&ar->scan.timeout); complete(&ar->scan.completed); break; } } void ath10k_scan_finish(struct ath10k *ar) { spin_lock_bh(&ar->data_lock); __ath10k_scan_finish(ar); spin_unlock_bh(&ar->data_lock); } static int ath10k_scan_stop(struct ath10k *ar) { struct wmi_stop_scan_arg arg = { .req_id = 1, /* FIXME */ .req_type = WMI_SCAN_STOP_ONE, .u.scan_id = ATH10K_SCAN_ID, }; int ret; lockdep_assert_held(&ar->conf_mutex); ret = ath10k_wmi_stop_scan(ar, &arg); if (ret) { ath10k_warn(ar, "failed to stop wmi scan: %d\n", ret); goto out; } ret = wait_for_completion_timeout(&ar->scan.completed, 3 * HZ); if (ret == 0) { ath10k_warn(ar, "failed to receive scan abortion completion: timed out\n"); ret = -ETIMEDOUT; } else if (ret > 0) { ret = 0; } out: /* Scan state should be updated upon scan completion but in case * firmware fails to deliver the event (for whatever reason) it is * desired to clean up scan state anyway. Firmware may have just * dropped the scan completion event delivery due to transport pipe * being overflown with data and/or it can recover on its own before * next scan request is submitted. */ spin_lock_bh(&ar->data_lock); if (ar->scan.state != ATH10K_SCAN_IDLE) __ath10k_scan_finish(ar); spin_unlock_bh(&ar->data_lock); return ret; } static void ath10k_scan_abort(struct ath10k *ar) { int ret; lockdep_assert_held(&ar->conf_mutex); spin_lock_bh(&ar->data_lock); switch (ar->scan.state) { case ATH10K_SCAN_IDLE: /* This can happen if timeout worker kicked in and called * abortion while scan completion was being processed. */ break; case ATH10K_SCAN_STARTING: case ATH10K_SCAN_ABORTING: ath10k_warn(ar, "refusing scan abortion due to invalid scan state: %s (%d)\n", ath10k_scan_state_str(ar->scan.state), ar->scan.state); break; case ATH10K_SCAN_RUNNING: ar->scan.state = ATH10K_SCAN_ABORTING; spin_unlock_bh(&ar->data_lock); ret = ath10k_scan_stop(ar); if (ret) ath10k_warn(ar, "failed to abort scan: %d\n", ret); spin_lock_bh(&ar->data_lock); break; } spin_unlock_bh(&ar->data_lock); } void ath10k_scan_timeout_work(struct work_struct *work) { struct ath10k *ar = container_of(work, struct ath10k, scan.timeout.work); mutex_lock(&ar->conf_mutex); ath10k_scan_abort(ar); mutex_unlock(&ar->conf_mutex); } static int ath10k_start_scan(struct ath10k *ar, const struct wmi_start_scan_arg *arg) { int ret; lockdep_assert_held(&ar->conf_mutex); ret = ath10k_wmi_start_scan(ar, arg); if (ret) return ret; ret = wait_for_completion_timeout(&ar->scan.started, 1 * HZ); if (ret == 0) { ret = ath10k_scan_stop(ar); if (ret) ath10k_warn(ar, "failed to stop scan: %d\n", ret); return -ETIMEDOUT; } /* If we failed to start the scan, return error code at * this point. This is probably due to some issue in the * firmware, but no need to wedge the driver due to that... */ spin_lock_bh(&ar->data_lock); if (ar->scan.state == ATH10K_SCAN_IDLE) { spin_unlock_bh(&ar->data_lock); return -EINVAL; } spin_unlock_bh(&ar->data_lock); return 0; } /**********************/ /* mac80211 callbacks */ /**********************/ static void ath10k_mac_op_tx(struct ieee80211_hw *hw, struct ieee80211_tx_control *control, struct sk_buff *skb) { struct ath10k *ar = hw->priv; struct ath10k_htt *htt = &ar->htt; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); struct ieee80211_vif *vif = info->control.vif; struct ieee80211_sta *sta = control->sta; struct ieee80211_txq *txq = NULL; enum ath10k_hw_txrx_mode txmode; enum ath10k_mac_tx_path txpath; bool is_htt; bool is_mgmt; int ret; u16 airtime; airtime = ath10k_mac_update_airtime(ar, txq, skb); ath10k_mac_tx_h_fill_cb(ar, vif, txq, sta, skb, airtime); txmode = ath10k_mac_tx_h_get_txmode(ar, vif, sta, skb); txpath = ath10k_mac_tx_h_get_txpath(ar, skb, txmode); is_htt = (txpath == ATH10K_MAC_TX_HTT || txpath == ATH10K_MAC_TX_HTT_MGMT); is_mgmt = (txpath == ATH10K_MAC_TX_HTT_MGMT); if (is_htt) { bool is_presp = false; spin_lock_bh(&ar->htt.tx_lock); if (!(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)) { struct ieee80211_hdr *hdr = (void *)skb->data; is_presp = ieee80211_is_probe_resp(hdr->frame_control); } ret = ath10k_htt_tx_inc_pending(htt); if (ret) { ath10k_warn(ar, "failed to increase tx pending count: %d, dropping\n", ret); spin_unlock_bh(&ar->htt.tx_lock); ieee80211_free_txskb(ar->hw, skb); return; } ret = ath10k_htt_tx_mgmt_inc_pending(htt, is_mgmt, is_presp); if (ret) { ath10k_dbg(ar, ATH10K_DBG_MAC, "failed to increase tx mgmt pending count: %d, dropping\n", ret); ath10k_htt_tx_dec_pending(htt); spin_unlock_bh(&ar->htt.tx_lock); ieee80211_free_txskb(ar->hw, skb); return; } spin_unlock_bh(&ar->htt.tx_lock); } ret = ath10k_mac_tx(ar, vif, txmode, txpath, skb, false); if (ret) { ath10k_warn(ar, "failed to transmit frame: %d\n", ret); if (is_htt) { spin_lock_bh(&ar->htt.tx_lock); ath10k_htt_tx_dec_pending(htt); if (is_mgmt) ath10k_htt_tx_mgmt_dec_pending(htt); spin_unlock_bh(&ar->htt.tx_lock); } return; } } static void ath10k_mac_op_wake_tx_queue(struct ieee80211_hw *hw, struct ieee80211_txq *txq) { struct ath10k *ar = hw->priv; int ret; u8 ac = txq->ac; ath10k_htt_tx_txq_update(hw, txq); if (ar->htt.tx_q_state.mode != HTT_TX_MODE_SWITCH_PUSH) return; spin_lock_bh(&ar->queue_lock[ac]); ieee80211_txq_schedule_start(hw, ac); txq = ieee80211_next_txq(hw, ac); if (!txq) goto out; while (ath10k_mac_tx_can_push(hw, txq)) { ret = ath10k_mac_tx_push_txq(hw, txq); if (ret < 0) break; } ieee80211_return_txq(hw, txq, false); ath10k_htt_tx_txq_update(hw, txq); out: ieee80211_txq_schedule_end(hw, ac); spin_unlock_bh(&ar->queue_lock[ac]); } /* Must not be called with conf_mutex held as workers can use that also. */ void ath10k_drain_tx(struct ath10k *ar) { lockdep_assert_not_held(&ar->conf_mutex); /* make sure rcu-protected mac80211 tx path itself is drained */ synchronize_net(); ath10k_offchan_tx_purge(ar); ath10k_mgmt_over_wmi_tx_purge(ar); cancel_work_sync(&ar->offchan_tx_work); cancel_work_sync(&ar->wmi_mgmt_tx_work); } void ath10k_halt(struct ath10k *ar) { struct ath10k_vif *arvif; lockdep_assert_held(&ar->conf_mutex); clear_bit(ATH10K_CAC_RUNNING, &ar->dev_flags); ar->filter_flags = 0; ar->monitor = false; ar->monitor_arvif = NULL; if (ar->monitor_started) ath10k_monitor_stop(ar); ar->monitor_started = false; ar->tx_paused = 0; ath10k_scan_finish(ar); ath10k_peer_cleanup_all(ar); ath10k_stop_radar_confirmation(ar); ath10k_core_stop(ar); ath10k_hif_power_down(ar); spin_lock_bh(&ar->data_lock); list_for_each_entry(arvif, &ar->arvifs, list) ath10k_mac_vif_beacon_cleanup(arvif); spin_unlock_bh(&ar->data_lock); } static int ath10k_get_antenna(struct ieee80211_hw *hw, int radio_idx, u32 *tx_ant, u32 *rx_ant) { struct ath10k *ar = hw->priv; mutex_lock(&ar->conf_mutex); *tx_ant = ar->cfg_tx_chainmask; *rx_ant = ar->cfg_rx_chainmask; mutex_unlock(&ar->conf_mutex); return 0; } static bool ath10k_check_chain_mask(struct ath10k *ar, u32 cm, const char *dbg) { /* It is not clear that allowing gaps in chainmask * is helpful. Probably it will not do what user * is hoping for, so warn in that case. */ if (cm == 15 || cm == 7 || cm == 3 || cm == 1 || cm == 0) return true; ath10k_warn(ar, "mac %s antenna chainmask is invalid: 0x%x. Suggested values: 15, 7, 3, 1 or 0.\n", dbg, cm); return false; } static int ath10k_mac_get_vht_cap_bf_sts(struct ath10k *ar) { int nsts = ar->vht_cap_info; nsts &= IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; nsts >>= IEEE80211_VHT_CAP_BEAMFORMEE_STS_SHIFT; /* If firmware does not deliver to host number of space-time * streams supported, assume it support up to 4 BF STS and return * the value for VHT CAP: nsts-1) */ if (nsts == 0) return 3; return nsts; } static int ath10k_mac_get_vht_cap_bf_sound_dim(struct ath10k *ar) { int sound_dim = ar->vht_cap_info; sound_dim &= IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MASK; sound_dim >>= IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_SHIFT; /* If the sounding dimension is not advertised by the firmware, * let's use a default value of 1 */ if (sound_dim == 0) return 1; return sound_dim; } static struct ieee80211_sta_vht_cap ath10k_create_vht_cap(struct ath10k *ar) { struct ieee80211_sta_vht_cap vht_cap = {}; struct ath10k_hw_params *hw = &ar->hw_params; u16 mcs_map; u32 val; int i; vht_cap.vht_supported = 1; vht_cap.cap = ar->vht_cap_info; if (ar->vht_cap_info & (IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE)) { val = ath10k_mac_get_vht_cap_bf_sts(ar); val <<= IEEE80211_VHT_CAP_BEAMFORMEE_STS_SHIFT; val &= IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; vht_cap.cap |= val; } if (ar->vht_cap_info & (IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)) { val = ath10k_mac_get_vht_cap_bf_sound_dim(ar); val <<= IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_SHIFT; val &= IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MASK; vht_cap.cap |= val; } mcs_map = 0; for (i = 0; i < 8; i++) { if ((i < ar->num_rf_chains) && (ar->cfg_tx_chainmask & BIT(i))) mcs_map |= IEEE80211_VHT_MCS_SUPPORT_0_9 << (i * 2); else mcs_map |= IEEE80211_VHT_MCS_NOT_SUPPORTED << (i * 2); } if (ar->cfg_tx_chainmask <= 1) vht_cap.cap &= ~IEEE80211_VHT_CAP_TXSTBC; vht_cap.vht_mcs.rx_mcs_map = cpu_to_le16(mcs_map); vht_cap.vht_mcs.tx_mcs_map = cpu_to_le16(mcs_map); /* If we are supporting 160Mhz or 80+80, then the NIC may be able to do * a restricted NSS for 160 or 80+80 vs what it can do for 80Mhz. Give * user-space a clue if that is the case. */ if ((vht_cap.cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) && (hw->vht160_mcs_rx_highest != 0 || hw->vht160_mcs_tx_highest != 0)) { vht_cap.vht_mcs.rx_highest = cpu_to_le16(hw->vht160_mcs_rx_highest); vht_cap.vht_mcs.tx_highest = cpu_to_le16(hw->vht160_mcs_tx_highest); } return vht_cap; } static struct ieee80211_sta_ht_cap ath10k_get_ht_cap(struct ath10k *ar) { int i; struct ieee80211_sta_ht_cap ht_cap = {}; if (!(ar->ht_cap_info & WMI_HT_CAP_ENABLED)) return ht_cap; ht_cap.ht_supported = 1; ht_cap.ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K; ht_cap.ampdu_density = IEEE80211_HT_MPDU_DENSITY_8; ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40; ht_cap.cap |= IEEE80211_HT_CAP_DSSSCCK40; ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED << IEEE80211_HT_CAP_SM_PS_SHIFT; if (ar->ht_cap_info & WMI_HT_CAP_HT20_SGI) ht_cap.cap |= IEEE80211_HT_CAP_SGI_20; if (ar->ht_cap_info & WMI_HT_CAP_HT40_SGI) ht_cap.cap |= IEEE80211_HT_CAP_SGI_40; if (ar->ht_cap_info & WMI_HT_CAP_DYNAMIC_SMPS) { u32 smps; smps = WLAN_HT_CAP_SM_PS_DYNAMIC; smps <<= IEEE80211_HT_CAP_SM_PS_SHIFT; ht_cap.cap |= smps; } if (ar->ht_cap_info & WMI_HT_CAP_TX_STBC && (ar->cfg_tx_chainmask > 1)) ht_cap.cap |= IEEE80211_HT_CAP_TX_STBC; if (ar->ht_cap_info & WMI_HT_CAP_RX_STBC) { u32 stbc; stbc = ar->ht_cap_info; stbc &= WMI_HT_CAP_RX_STBC; stbc >>= WMI_HT_CAP_RX_STBC_MASK_SHIFT; stbc <<= IEEE80211_HT_CAP_RX_STBC_SHIFT; stbc &= IEEE80211_HT_CAP_RX_STBC; ht_cap.cap |= stbc; } if (ar->ht_cap_info & WMI_HT_CAP_LDPC || (ar->ht_cap_info & WMI_HT_CAP_RX_LDPC && (ar->ht_cap_info & WMI_HT_CAP_TX_LDPC))) ht_cap.cap |= IEEE80211_HT_CAP_LDPC_CODING; if (ar->ht_cap_info & WMI_HT_CAP_L_SIG_TXOP_PROT) ht_cap.cap |= IEEE80211_HT_CAP_LSIG_TXOP_PROT; /* max AMSDU is implicitly taken from vht_cap_info */ if (ar->vht_cap_info & WMI_VHT_CAP_MAX_MPDU_LEN_MASK) ht_cap.cap |= IEEE80211_HT_CAP_MAX_AMSDU; for (i = 0; i < ar->num_rf_chains; i++) { if (ar->cfg_rx_chainmask & BIT(i)) ht_cap.mcs.rx_mask[i] = 0xFF; } ht_cap.mcs.tx_params |= IEEE80211_HT_MCS_TX_DEFINED; return ht_cap; } static void ath10k_mac_setup_ht_vht_cap(struct ath10k *ar) { struct ieee80211_supported_band *band; struct ieee80211_sta_vht_cap vht_cap; struct ieee80211_sta_ht_cap ht_cap; ht_cap = ath10k_get_ht_cap(ar); vht_cap = ath10k_create_vht_cap(ar); if (ar->phy_capability & WHAL_WLAN_11G_CAPABILITY) { band = &ar->mac.sbands[NL80211_BAND_2GHZ]; band->ht_cap = ht_cap; } if (ar->phy_capability & WHAL_WLAN_11A_CAPABILITY) { band = &ar->mac.sbands[NL80211_BAND_5GHZ]; band->ht_cap = ht_cap; band->vht_cap = vht_cap; } } static int __ath10k_set_antenna(struct ath10k *ar, u32 tx_ant, u32 rx_ant) { int ret; bool is_valid_tx_chain_mask, is_valid_rx_chain_mask; lockdep_assert_held(&ar->conf_mutex); is_valid_tx_chain_mask = ath10k_check_chain_mask(ar, tx_ant, "tx"); is_valid_rx_chain_mask = ath10k_check_chain_mask(ar, rx_ant, "rx"); if (!is_valid_tx_chain_mask || !is_valid_rx_chain_mask) return -EINVAL; ar->cfg_tx_chainmask = tx_ant; ar->cfg_rx_chainmask = rx_ant; if ((ar->state != ATH10K_STATE_ON) && (ar->state != ATH10K_STATE_RESTARTED)) return 0; ret = ath10k_wmi_pdev_set_param(ar, ar->wmi.pdev_param->tx_chain_mask, tx_ant); if (ret) { ath10k_warn(ar, "failed to set tx-chainmask: %d, req 0x%x\n", ret, tx_ant); return ret; } ret = ath10k_wmi_pdev_set_param(ar, ar->wmi.pdev_param->rx_chain_mask, rx_ant); if (ret) { ath10k_warn(ar, "failed to set rx-chainmask: %d, req 0x%x\n", ret, rx_ant); return ret; } /* Reload HT/VHT capability */ ath10k_mac_setup_ht_vht_cap(ar); return 0; } static int ath10k_set_antenna(struct ieee80211_hw *hw, int radio_idx, u32 tx_ant, u32 rx_ant) { struct ath10k *ar = hw->priv; int ret; mutex_lock(&ar->conf_mutex); ret = __ath10k_set_antenna(ar, tx_ant, rx_ant); mutex_unlock(&ar->conf_mutex); return ret; } static int __ath10k_fetch_bb_timing_dt(struct ath10k *ar, struct wmi_bb_timing_cfg_arg *bb_timing) { struct device_node *node; const char *fem_name; int ret; node = ar->dev->of_node; if (!node) return -ENOENT; ret = of_property_read_string_index(node, "ext-fem-name", 0, &fem_name); if (ret) return -ENOENT; /* * If external Front End module used in hardware, then default base band timing * parameter cannot be used since they were fine tuned for reference hardware, * so choosing different value suitable for that external FEM. */ if (!strcmp("microsemi-lx5586", fem_name)) { bb_timing->bb_tx_timing = 0x00; bb_timing->bb_xpa_timing = 0x0101; } else { return -ENOENT; } ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot bb_tx_timing 0x%x bb_xpa_timing 0x%x\n", bb_timing->bb_tx_timing, bb_timing->bb_xpa_timing); return 0; } static int ath10k_mac_rfkill_config(struct ath10k *ar) { u32 param; int ret; if (ar->hw_values->rfkill_pin == 0) { ath10k_warn(ar, "ath10k does not support hardware rfkill with this device\n"); return -EOPNOTSUPP; } ath10k_dbg(ar, ATH10K_DBG_MAC, "mac rfkill_pin %d rfkill_cfg %d rfkill_on_level %d", ar->hw_values->rfkill_pin, ar->hw_values->rfkill_cfg, ar->hw_values->rfkill_on_level); param = FIELD_PREP(WMI_TLV_RFKILL_CFG_RADIO_LEVEL, ar->hw_values->rfkill_on_level) | FIELD_PREP(WMI_TLV_RFKILL_CFG_GPIO_PIN_NUM, ar->hw_values->rfkill_pin) | FIELD_PREP(WMI_TLV_RFKILL_CFG_PIN_AS_GPIO, ar->hw_values->rfkill_cfg); ret = ath10k_wmi_pdev_set_param(ar, ar->wmi.pdev_param->rfkill_config, param); if (ret) { ath10k_warn(ar, "failed to set rfkill config 0x%x: %d\n", param, ret); return ret; } return 0; } int ath10k_mac_rfkill_enable_radio(struct ath10k *ar, bool enable) { enum wmi_tlv_rfkill_enable_radio param; int ret; if (enable) param = WMI_TLV_RFKILL_ENABLE_RADIO_ON; else param = WMI_TLV_RFKILL_ENABLE_RADIO_OFF; ath10k_dbg(ar, ATH10K_DBG_MAC, "mac rfkill enable %d", param); ret = ath10k_wmi_pdev_set_param(ar, ar->wmi.pdev_param->rfkill_enable, param); if (ret) { ath10k_warn(ar, "failed to set rfkill enable param %d: %d\n", param, ret); return ret; } return 0; } static int ath10k_start(struct ieee80211_hw *hw) { struct ath10k *ar = hw->priv; u32 param; int ret = 0; struct wmi_bb_timing_cfg_arg bb_timing = {}; /* * This makes sense only when restarting hw. It is harmless to call * unconditionally. This is necessary to make sure no HTT/WMI tx * commands will be submitted while restarting. */ ath10k_drain_tx(ar); mutex_lock(&ar->conf_mutex); switch (ar->state) { case ATH10K_STATE_OFF: ar->state = ATH10K_STATE_ON; break; case ATH10K_STATE_RESTARTING: ar->state = ATH10K_STATE_RESTARTED; break; case ATH10K_STATE_ON: case ATH10K_STATE_RESTARTED: case ATH10K_STATE_WEDGED: WARN_ON(1); ret = -EINVAL; goto err; case ATH10K_STATE_UTF: ret = -EBUSY; goto err; } spin_lock_bh(&ar->data_lock); if (ar->hw_rfkill_on) { ar->hw_rfkill_on = false; spin_unlock_bh(&ar->data_lock); goto err; } spin_unlock_bh(&ar->data_lock); ret = ath10k_hif_power_up(ar, ATH10K_FIRMWARE_MODE_NORMAL); if (ret) { ath10k_err(ar, "Could not init hif: %d\n", ret); goto err_off; } ret = ath10k_core_start(ar, ATH10K_FIRMWARE_MODE_NORMAL, &ar->normal_mode_fw); if (ret) { ath10k_err(ar, "Could not init core: %d\n", ret); goto err_power_down; } if (ar->sys_cap_info & WMI_TLV_SYS_CAP_INFO_RFKILL) { ret = ath10k_mac_rfkill_config(ar); if (ret && ret != -EOPNOTSUPP) { ath10k_warn(ar, "failed to configure rfkill: %d", ret); goto err_core_stop; } } param = ar->wmi.pdev_param->pmf_qos; ret = ath10k_wmi_pdev_set_param(ar, param, 1); if (ret) { ath10k_warn(ar, "failed to enable PMF QOS: %d\n", ret); goto err_core_stop; } param = ar->wmi.pdev_param->dynamic_bw; ret = ath10k_wmi_pdev_set_param(ar, param, 1); if (ret) { ath10k_warn(ar, "failed to enable dynamic BW: %d\n", ret); goto err_core_stop; } if (test_bit(WMI_SERVICE_SPOOF_MAC_SUPPORT, ar->wmi.svc_map)) { ret = ath10k_wmi_scan_prob_req_oui(ar, ar->mac_addr); if (ret) { ath10k_err(ar, "failed to set prob req oui: %i\n", ret); goto err_core_stop; } } if (test_bit(WMI_SERVICE_ADAPTIVE_OCS, ar->wmi.svc_map)) { ret = ath10k_wmi_adaptive_qcs(ar, true); if (ret) { ath10k_warn(ar, "failed to enable adaptive qcs: %d\n", ret); goto err_core_stop; } } if (test_bit(WMI_SERVICE_BURST, ar->wmi.svc_map)) { param = ar->wmi.pdev_param->burst_enable; ret = ath10k_wmi_pdev_set_param(ar, param, 0); if (ret) { ath10k_warn(ar, "failed to disable burst: %d\n", ret); goto err_core_stop; } } param = ar->wmi.pdev_param->idle_ps_config; ret = ath10k_wmi_pdev_set_param(ar, param, 1); if (ret && ret != -EOPNOTSUPP) { ath10k_warn(ar, "failed to enable idle_ps_config: %d\n", ret); goto err_core_stop; } __ath10k_set_antenna(ar, ar->cfg_tx_chainmask, ar->cfg_rx_chainmask); /* * By default FW set ARP frames ac to voice (6). In that case ARP * exchange is not working properly for UAPSD enabled AP. ARP requests * which arrives with access category 0 are processed by network stack * and send back with access category 0, but FW changes access category * to 6. Set ARP frames access category to best effort (0) solves * this problem. */ param = ar->wmi.pdev_param->arp_ac_override; ret = ath10k_wmi_pdev_set_param(ar, param, 0); if (ret) { ath10k_warn(ar, "failed to set arp ac override parameter: %d\n", ret); goto err_core_stop; } if (test_bit(ATH10K_FW_FEATURE_SUPPORTS_ADAPTIVE_CCA, ar->running_fw->fw_file.fw_features)) { ret = ath10k_wmi_pdev_enable_adaptive_cca(ar, 1, WMI_CCA_DETECT_LEVEL_AUTO, WMI_CCA_DETECT_MARGIN_AUTO); if (ret) { ath10k_warn(ar, "failed to enable adaptive cca: %d\n", ret); goto err_core_stop; } } param = ar->wmi.pdev_param->ani_enable; ret = ath10k_wmi_pdev_set_param(ar, param, 1); if (ret) { ath10k_warn(ar, "failed to enable ani by default: %d\n", ret); goto err_core_stop; } ar->ani_enabled = true; if (ath10k_peer_stats_enabled(ar)) { param = ar->wmi.pdev_param->peer_stats_update_period; ret = ath10k_wmi_pdev_set_param(ar, param, PEER_DEFAULT_STATS_UPDATE_PERIOD); if (ret) { ath10k_warn(ar, "failed to set peer stats period : %d\n", ret); goto err_core_stop; } } param = ar->wmi.pdev_param->enable_btcoex; if (test_bit(WMI_SERVICE_COEX_GPIO, ar->wmi.svc_map) && test_bit(ATH10K_FW_FEATURE_BTCOEX_PARAM, ar->running_fw->fw_file.fw_features) && ar->coex_support) { ret = ath10k_wmi_pdev_set_param(ar, param, 0); if (ret) { ath10k_warn(ar, "failed to set btcoex param: %d\n", ret); goto err_core_stop; } clear_bit(ATH10K_FLAG_BTCOEX, &ar->dev_flags); } if (test_bit(WMI_SERVICE_BB_TIMING_CONFIG_SUPPORT, ar->wmi.svc_map)) { ret = __ath10k_fetch_bb_timing_dt(ar, &bb_timing); if (!ret) { ret = ath10k_wmi_pdev_bb_timing(ar, &bb_timing); if (ret) { ath10k_warn(ar, "failed to set bb timings: %d\n", ret); goto err_core_stop; } } } ar->num_started_vdevs = 0; ath10k_regd_update(ar); ath10k_spectral_start(ar); ath10k_thermal_set_throttling(ar); ar->radar_conf_state = ATH10K_RADAR_CONFIRMATION_IDLE; mutex_unlock(&ar->conf_mutex); return 0; err_core_stop: ath10k_core_stop(ar); err_power_down: ath10k_hif_power_down(ar); err_off: ar->state = ATH10K_STATE_OFF; err: mutex_unlock(&ar->conf_mutex); return ret; } static void ath10k_stop(struct ieee80211_hw *hw, bool suspend) { struct ath10k *ar = hw->priv; u32 opt; ath10k_drain_tx(ar); mutex_lock(&ar->conf_mutex); if (ar->state != ATH10K_STATE_OFF) { if (!ar->hw_rfkill_on) { /* If the current driver state is RESTARTING but not yet * fully RESTARTED because of incoming suspend event, * then ath10k_halt() is already called via * ath10k_core_restart() and should not be called here. */ if (ar->state != ATH10K_STATE_RESTARTING) { ath10k_halt(ar); } else { /* Suspending here, because when in RESTARTING * state, ath10k_core_stop() skips * ath10k_wait_for_suspend(). */ opt = WMI_PDEV_SUSPEND_AND_DISABLE_INTR; ath10k_wait_for_suspend(ar, opt); } } ar->state = ATH10K_STATE_OFF; } mutex_unlock(&ar->conf_mutex); cancel_work_sync(&ar->set_coverage_class_work); cancel_delayed_work_sync(&ar->scan.timeout); cancel_work_sync(&ar->restart_work); cancel_work_sync(&ar->recovery_check_work); } static int ath10k_config_ps(struct ath10k *ar) { struct ath10k_vif *arvif; int ret = 0; lockdep_assert_held(&ar->conf_mutex); list_for_each_entry(arvif, &ar->arvifs, list) { ret = ath10k_mac_vif_setup_ps(arvif); if (ret) { ath10k_warn(ar, "failed to setup powersave: %d\n", ret); break; } } return ret; } static int ath10k_config(struct ieee80211_hw *hw, int radio_idx, u32 changed) { struct ath10k *ar = hw->priv; struct ieee80211_conf *conf = &hw->conf; int ret = 0; mutex_lock(&ar->conf_mutex); if (changed & IEEE80211_CONF_CHANGE_PS) ath10k_config_ps(ar); if (changed & IEEE80211_CONF_CHANGE_MONITOR) { ar->monitor = conf->flags & IEEE80211_CONF_MONITOR; ret = ath10k_monitor_recalc(ar); if (ret) ath10k_warn(ar, "failed to recalc monitor: %d\n", ret); } mutex_unlock(&ar->conf_mutex); return ret; } static u32 get_nss_from_chainmask(u16 chain_mask) { if ((chain_mask & 0xf) == 0xf) return 4; else if ((chain_mask & 0x7) == 0x7) return 3; else if ((chain_mask & 0x3) == 0x3) return 2; return 1; } static int ath10k_mac_set_txbf_conf(struct ath10k_vif *arvif) { u32 value = 0; struct ath10k *ar = arvif->ar; int nsts; int sound_dim; if (ath10k_wmi_get_txbf_conf_scheme(ar) != WMI_TXBF_CONF_BEFORE_ASSOC) return 0; nsts = ath10k_mac_get_vht_cap_bf_sts(ar); if (ar->vht_cap_info & (IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE)) value |= SM(nsts, WMI_TXBF_STS_CAP_OFFSET); sound_dim = ath10k_mac_get_vht_cap_bf_sound_dim(ar); if (ar->vht_cap_info & (IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)) value |= SM(sound_dim, WMI_BF_SOUND_DIM_OFFSET); if (!value) return 0; if (ar->vht_cap_info & IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE) value |= WMI_VDEV_PARAM_TXBF_SU_TX_BFER; if (ar->vht_cap_info & IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE) value |= (WMI_VDEV_PARAM_TXBF_MU_TX_BFER | WMI_VDEV_PARAM_TXBF_SU_TX_BFER); if (ar->vht_cap_info & IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE) value |= WMI_VDEV_PARAM_TXBF_SU_TX_BFEE; if (ar->vht_cap_info & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) value |= (WMI_VDEV_PARAM_TXBF_MU_TX_BFEE | WMI_VDEV_PARAM_TXBF_SU_TX_BFEE); return ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, ar->wmi.vdev_param->txbf, value); } static void ath10k_update_vif_offload(struct ieee80211_hw *hw, struct ieee80211_vif *vif) { struct ath10k_vif *arvif = (void *)vif->drv_priv; struct ath10k *ar = hw->priv; u32 vdev_param; int ret; if (ath10k_frame_mode != ATH10K_HW_TXRX_ETHERNET || ar->wmi.vdev_param->tx_encap_type == WMI_VDEV_PARAM_UNSUPPORTED || (vif->type != NL80211_IFTYPE_STATION && vif->type != NL80211_IFTYPE_AP)) vif->offload_flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; vdev_param = ar->wmi.vdev_param->tx_encap_type; ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, vdev_param, ATH10K_HW_TXRX_NATIVE_WIFI); /* 10.X firmware does not support this VDEV parameter. Do not warn */ if (ret && ret != -EOPNOTSUPP) { ath10k_warn(ar, "failed to set vdev %i TX encapsulation: %d\n", arvif->vdev_id, ret); } } /* * TODO: * Figure out how to handle WMI_VDEV_SUBTYPE_P2P_DEVICE, * because we will send mgmt frames without CCK. This requirement * for P2P_FIND/GO_NEG should be handled by checking CCK flag * in the TX packet. */ static int ath10k_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif) { struct ath10k *ar = hw->priv; struct ath10k_vif *arvif = (void *)vif->drv_priv; struct ath10k_peer *peer; enum wmi_sta_powersave_param param; int ret = 0; u32 value; int bit; int i; u32 vdev_param; vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD; mutex_lock(&ar->conf_mutex); memset(arvif, 0, sizeof(*arvif)); ath10k_mac_txq_init(vif->txq); arvif->ar = ar; arvif->vif = vif; INIT_LIST_HEAD(&arvif->list); INIT_WORK(&arvif->ap_csa_work, ath10k_mac_vif_ap_csa_work); INIT_DELAYED_WORK(&arvif->connection_loss_work, ath10k_mac_vif_sta_connection_loss_work); for (i = 0; i < ARRAY_SIZE(arvif->bitrate_mask.control); i++) { arvif->bitrate_mask.control[i].legacy = 0xffffffff; memset(arvif->bitrate_mask.control[i].ht_mcs, 0xff, sizeof(arvif->bitrate_mask.control[i].ht_mcs)); memset(arvif->bitrate_mask.control[i].vht_mcs, 0xff, sizeof(arvif->bitrate_mask.control[i].vht_mcs)); } if (ar->num_peers >= ar->max_num_peers) { ath10k_warn(ar, "refusing vdev creation due to insufficient peer entry resources in firmware\n"); ret = -ENOBUFS; goto err; } if (ar->free_vdev_map == 0) { ath10k_warn(ar, "Free vdev map is empty, no more interfaces allowed.\n"); ret = -EBUSY; goto err; } bit = __ffs64(ar->free_vdev_map); ath10k_dbg(ar, ATH10K_DBG_MAC, "mac create vdev %i map %llx\n", bit, ar->free_vdev_map); arvif->vdev_id = bit; arvif->vdev_subtype = ath10k_wmi_get_vdev_subtype(ar, WMI_VDEV_SUBTYPE_NONE); switch (vif->type) { case NL80211_IFTYPE_P2P_DEVICE: arvif->vdev_type = WMI_VDEV_TYPE_STA; arvif->vdev_subtype = ath10k_wmi_get_vdev_subtype (ar, WMI_VDEV_SUBTYPE_P2P_DEVICE); break; case NL80211_IFTYPE_UNSPECIFIED: case NL80211_IFTYPE_STATION: arvif->vdev_type = WMI_VDEV_TYPE_STA; if (vif->p2p) arvif->vdev_subtype = ath10k_wmi_get_vdev_subtype (ar, WMI_VDEV_SUBTYPE_P2P_CLIENT); break; case NL80211_IFTYPE_ADHOC: arvif->vdev_type = WMI_VDEV_TYPE_IBSS; break; case NL80211_IFTYPE_MESH_POINT: if (test_bit(WMI_SERVICE_MESH_11S, ar->wmi.svc_map)) { arvif->vdev_subtype = ath10k_wmi_get_vdev_subtype (ar, WMI_VDEV_SUBTYPE_MESH_11S); } else if (!test_bit(ATH10K_FLAG_RAW_MODE, &ar->dev_flags)) { ret = -EINVAL; ath10k_warn(ar, "must load driver with rawmode=1 to add mesh interfaces\n"); goto err; } arvif->vdev_type = WMI_VDEV_TYPE_AP; break; case NL80211_IFTYPE_AP: arvif->vdev_type = WMI_VDEV_TYPE_AP; if (vif->p2p) arvif->vdev_subtype = ath10k_wmi_get_vdev_subtype (ar, WMI_VDEV_SUBTYPE_P2P_GO); break; case NL80211_IFTYPE_MONITOR: arvif->vdev_type = WMI_VDEV_TYPE_MONITOR; break; default: WARN_ON(1); break; } /* Using vdev_id as queue number will make it very easy to do per-vif * tx queue locking. This shouldn't wrap due to interface combinations * but do a modulo for correctness sake and prevent using offchannel tx * queues for regular vif tx. */ vif->cab_queue = arvif->vdev_id % (IEEE80211_MAX_QUEUES - 1); for (i = 0; i < ARRAY_SIZE(vif->hw_queue); i++) vif->hw_queue[i] = arvif->vdev_id % (IEEE80211_MAX_QUEUES - 1); /* Some firmware revisions don't wait for beacon tx completion before * sending another SWBA event. This could lead to hardware using old * (freed) beacon data in some cases, e.g. tx credit starvation * combined with missed TBTT. This is very rare. * * On non-IOMMU-enabled hosts this could be a possible security issue * because hw could beacon some random data on the air. On * IOMMU-enabled hosts DMAR faults would occur in most cases and target * device would crash. * * Since there are no beacon tx completions (implicit nor explicit) * propagated to host the only workaround for this is to allocate a * DMA-coherent buffer for a lifetime of a vif and use it for all * beacon tx commands. Worst case for this approach is some beacons may * become corrupted, e.g. have garbled IEs or out-of-date TIM bitmap. */ if (vif->type == NL80211_IFTYPE_ADHOC || vif->type == NL80211_IFTYPE_MESH_POINT || vif->type == NL80211_IFTYPE_AP) { if (ar->bus_param.dev_type == ATH10K_DEV_TYPE_HL) { arvif->beacon_buf = kmalloc(IEEE80211_MAX_FRAME_LEN, GFP_KERNEL); /* Using a kernel pointer in place of a dma_addr_t * token can lead to undefined behavior if that * makes it into cache management functions. Use a * known-invalid address token instead, which * avoids the warning and makes it easier to catch * bugs if it does end up getting used. */ arvif->beacon_paddr = DMA_MAPPING_ERROR; } else { arvif->beacon_buf = dma_alloc_coherent(ar->dev, IEEE80211_MAX_FRAME_LEN, &arvif->beacon_paddr, GFP_ATOMIC); } if (!arvif->beacon_buf) { ret = -ENOMEM; ath10k_warn(ar, "failed to allocate beacon buffer: %d\n", ret); goto err; } } if (test_bit(ATH10K_FLAG_HW_CRYPTO_DISABLED, &ar->dev_flags)) arvif->nohwcrypt = true; if (arvif->nohwcrypt && !test_bit(ATH10K_FLAG_RAW_MODE, &ar->dev_flags)) { ret = -EINVAL; ath10k_warn(ar, "cryptmode module param needed for sw crypto\n"); goto err; } ath10k_dbg(ar, ATH10K_DBG_MAC, "mac vdev create %d (add interface) type %d subtype %d bcnmode %s\n", arvif->vdev_id, arvif->vdev_type, arvif->vdev_subtype, arvif->beacon_buf ? "single-buf" : "per-skb"); ret = ath10k_wmi_vdev_create(ar, arvif->vdev_id, arvif->vdev_type, arvif->vdev_subtype, vif->addr); if (ret) { ath10k_warn(ar, "failed to create WMI vdev %i: %d\n", arvif->vdev_id, ret); goto err; } if (test_bit(WMI_SERVICE_VDEV_DISABLE_4_ADDR_SRC_LRN_SUPPORT, ar->wmi.svc_map)) { vdev_param = ar->wmi.vdev_param->disable_4addr_src_lrn; ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, vdev_param, WMI_VDEV_DISABLE_4_ADDR_SRC_LRN); if (ret && ret != -EOPNOTSUPP) { ath10k_warn(ar, "failed to disable 4addr src lrn vdev %i: %d\n", arvif->vdev_id, ret); } } ar->free_vdev_map &= ~(1LL << arvif->vdev_id); spin_lock_bh(&ar->data_lock); list_add(&arvif->list, &ar->arvifs); spin_unlock_bh(&ar->data_lock); /* It makes no sense to have firmware do keepalives. mac80211 already * takes care of this with idle connection polling. */ ret = ath10k_mac_vif_disable_keepalive(arvif); if (ret) { ath10k_warn(ar, "failed to disable keepalive on vdev %i: %d\n", arvif->vdev_id, ret); goto err_vdev_delete; } arvif->def_wep_key_idx = -1; ath10k_update_vif_offload(hw, vif); /* Configuring number of spatial stream for monitor interface is causing * target assert in qca9888 and qca6174. */ if (ar->cfg_tx_chainmask && (vif->type != NL80211_IFTYPE_MONITOR)) { u16 nss = get_nss_from_chainmask(ar->cfg_tx_chainmask); vdev_param = ar->wmi.vdev_param->nss; ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, vdev_param, nss); if (ret) { ath10k_warn(ar, "failed to set vdev %i chainmask 0x%x, nss %i: %d\n", arvif->vdev_id, ar->cfg_tx_chainmask, nss, ret); goto err_vdev_delete; } } if (arvif->vdev_type == WMI_VDEV_TYPE_AP || arvif->vdev_type == WMI_VDEV_TYPE_IBSS) { ret = ath10k_peer_create(ar, vif, NULL, arvif->vdev_id, vif->addr, WMI_PEER_TYPE_DEFAULT); if (ret) { ath10k_warn(ar, "failed to create vdev %i peer for AP/IBSS: %d\n", arvif->vdev_id, ret); goto err_vdev_delete; } spin_lock_bh(&ar->data_lock); peer = ath10k_peer_find(ar, arvif->vdev_id, vif->addr); if (!peer) { ath10k_warn(ar, "failed to lookup peer %pM on vdev %i\n", vif->addr, arvif->vdev_id); spin_unlock_bh(&ar->data_lock); ret = -ENOENT; goto err_peer_delete; } arvif->peer_id = find_first_bit(peer->peer_ids, ATH10K_MAX_NUM_PEER_IDS); spin_unlock_bh(&ar->data_lock); } else { arvif->peer_id = HTT_INVALID_PEERID; } if (arvif->vdev_type == WMI_VDEV_TYPE_AP) { ret = ath10k_mac_set_kickout(arvif); if (ret) { ath10k_warn(ar, "failed to set vdev %i kickout parameters: %d\n", arvif->vdev_id, ret); goto err_peer_delete; } } if (arvif->vdev_type == WMI_VDEV_TYPE_STA) { param = WMI_STA_PS_PARAM_RX_WAKE_POLICY; value = WMI_STA_PS_RX_WAKE_POLICY_WAKE; ret = ath10k_wmi_set_sta_ps_param(ar, arvif->vdev_id, param, value); if (ret) { ath10k_warn(ar, "failed to set vdev %i RX wake policy: %d\n", arvif->vdev_id, ret); goto err_peer_delete; } ret = ath10k_mac_vif_recalc_ps_wake_threshold(arvif); if (ret) { ath10k_warn(ar, "failed to recalc ps wake threshold on vdev %i: %d\n", arvif->vdev_id, ret); goto err_peer_delete; } ret = ath10k_mac_vif_recalc_ps_poll_count(arvif); if (ret) { ath10k_warn(ar, "failed to recalc ps poll count on vdev %i: %d\n", arvif->vdev_id, ret); goto err_peer_delete; } } ret = ath10k_mac_set_txbf_conf(arvif); if (ret) { ath10k_warn(ar, "failed to set txbf for vdev %d: %d\n", arvif->vdev_id, ret); goto err_peer_delete; } ret = ath10k_mac_set_rts(arvif, ar->hw->wiphy->rts_threshold); if (ret) { ath10k_warn(ar, "failed to set rts threshold for vdev %d: %d\n", arvif->vdev_id, ret); goto err_peer_delete; } arvif->txpower = vif->bss_conf.txpower; ret = ath10k_mac_txpower_recalc(ar); if (ret) { ath10k_warn(ar, "failed to recalc tx power: %d\n", ret); goto err_peer_delete; } if (test_bit(WMI_SERVICE_RTT_RESPONDER_ROLE, ar->wmi.svc_map)) { vdev_param = ar->wmi.vdev_param->rtt_responder_role; ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, vdev_param, arvif->ftm_responder); /* It is harmless to not set FTM role. Do not warn */ if (ret && ret != -EOPNOTSUPP) ath10k_warn(ar, "failed to set vdev %i FTM Responder: %d\n", arvif->vdev_id, ret); } if (vif->type == NL80211_IFTYPE_MONITOR) { ar->monitor_arvif = arvif; ret = ath10k_monitor_recalc(ar); if (ret) { ath10k_warn(ar, "failed to recalc monitor: %d\n", ret); goto err_peer_delete; } } spin_lock_bh(&ar->htt.tx_lock); if (!ar->tx_paused) ieee80211_wake_queue(ar->hw, arvif->vdev_id); spin_unlock_bh(&ar->htt.tx_lock); mutex_unlock(&ar->conf_mutex); return 0; err_peer_delete: if (arvif->vdev_type == WMI_VDEV_TYPE_AP || arvif->vdev_type == WMI_VDEV_TYPE_IBSS) { ath10k_wmi_peer_delete(ar, arvif->vdev_id, vif->addr); ath10k_wait_for_peer_delete_done(ar, arvif->vdev_id, vif->addr); } err_vdev_delete: ath10k_wmi_vdev_delete(ar, arvif->vdev_id); ar->free_vdev_map |= 1LL << arvif->vdev_id; spin_lock_bh(&ar->data_lock); list_del(&arvif->list); spin_unlock_bh(&ar->data_lock); err: if (arvif->beacon_buf) { if (ar->bus_param.dev_type == ATH10K_DEV_TYPE_HL) kfree(arvif->beacon_buf); else dma_free_coherent(ar->dev, IEEE80211_MAX_FRAME_LEN, arvif->beacon_buf, arvif->beacon_paddr); arvif->beacon_buf = NULL; } mutex_unlock(&ar->conf_mutex); return ret; } static void ath10k_mac_vif_tx_unlock_all(struct ath10k_vif *arvif) { int i; for (i = 0; i < BITS_PER_LONG; i++) ath10k_mac_vif_tx_unlock(arvif, i); } static void ath10k_remove_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif) { struct ath10k *ar = hw->priv; struct ath10k_vif *arvif = (void *)vif->drv_priv; struct ath10k_peer *peer; int ret; int i; cancel_work_sync(&arvif->ap_csa_work); cancel_delayed_work_sync(&arvif->connection_loss_work); mutex_lock(&ar->conf_mutex); ret = ath10k_spectral_vif_stop(arvif); if (ret) ath10k_warn(ar, "failed to stop spectral for vdev %i: %d\n", arvif->vdev_id, ret); ar->free_vdev_map |= 1LL << arvif->vdev_id; spin_lock_bh(&ar->data_lock); list_del(&arvif->list); spin_unlock_bh(&ar->data_lock); if (arvif->vdev_type == WMI_VDEV_TYPE_AP || arvif->vdev_type == WMI_VDEV_TYPE_IBSS) { ret = ath10k_wmi_peer_delete(arvif->ar, arvif->vdev_id, vif->addr); if (ret) ath10k_warn(ar, "failed to submit AP/IBSS self-peer removal on vdev %i: %d\n", arvif->vdev_id, ret); ath10k_wait_for_peer_delete_done(ar, arvif->vdev_id, vif->addr); kfree(arvif->u.ap.noa_data); } ath10k_dbg(ar, ATH10K_DBG_MAC, "mac vdev %i delete (remove interface)\n", arvif->vdev_id); ret = ath10k_wmi_vdev_delete(ar, arvif->vdev_id); if (ret) ath10k_warn(ar, "failed to delete WMI vdev %i: %d\n", arvif->vdev_id, ret); ret = ath10k_vdev_delete_sync(ar); if (ret) { ath10k_warn(ar, "Error in receiving vdev delete response: %d\n", ret); goto out; } /* Some firmware revisions don't notify host about self-peer removal * until after associated vdev is deleted. */ if (arvif->vdev_type == WMI_VDEV_TYPE_AP || arvif->vdev_type == WMI_VDEV_TYPE_IBSS) { ret = ath10k_wait_for_peer_deleted(ar, arvif->vdev_id, vif->addr); if (ret) ath10k_warn(ar, "failed to remove AP self-peer on vdev %i: %d\n", arvif->vdev_id, ret); spin_lock_bh(&ar->data_lock); ar->num_peers--; spin_unlock_bh(&ar->data_lock); } spin_lock_bh(&ar->data_lock); for (i = 0; i < ARRAY_SIZE(ar->peer_map); i++) { peer = ar->peer_map[i]; if (!peer) continue; if (peer->vif == vif) { ath10k_warn(ar, "found vif peer %pM entry on vdev %i after it was supposedly removed\n", vif->addr, arvif->vdev_id); peer->vif = NULL; } } /* Clean this up late, less opportunity for firmware to access * DMA memory we have deleted. */ ath10k_mac_vif_beacon_cleanup(arvif); spin_unlock_bh(&ar->data_lock); ath10k_peer_cleanup(ar, arvif->vdev_id); ath10k_mac_txq_unref(ar, vif->txq); if (vif->type == NL80211_IFTYPE_MONITOR) { ar->monitor_arvif = NULL; ret = ath10k_monitor_recalc(ar); if (ret) ath10k_warn(ar, "failed to recalc monitor: %d\n", ret); } ret = ath10k_mac_txpower_recalc(ar); if (ret) ath10k_warn(ar, "failed to recalc tx power: %d\n", ret); spin_lock_bh(&ar->htt.tx_lock); ath10k_mac_vif_tx_unlock_all(arvif); spin_unlock_bh(&ar->htt.tx_lock); ath10k_mac_txq_unref(ar, vif->txq); out: mutex_unlock(&ar->conf_mutex); } /* * FIXME: Has to be verified. */ #define SUPPORTED_FILTERS \ (FIF_ALLMULTI | \ FIF_CONTROL | \ FIF_PSPOLL | \ FIF_OTHER_BSS | \ FIF_BCN_PRBRESP_PROMISC | \ FIF_PROBE_REQ | \ FIF_FCSFAIL) static void ath10k_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags, unsigned int *total_flags, u64 multicast) { struct ath10k *ar = hw->priv; int ret; unsigned int supported = SUPPORTED_FILTERS; mutex_lock(&ar->conf_mutex); if (ar->hw_params.mcast_frame_registration) supported |= FIF_MCAST_ACTION; *total_flags &= supported; ar->filter_flags = *total_flags; ret = ath10k_monitor_recalc(ar); if (ret) ath10k_warn(ar, "failed to recalc monitor: %d\n", ret); mutex_unlock(&ar->conf_mutex); } static void ath10k_recalculate_mgmt_rate(struct ath10k *ar, struct ieee80211_vif *vif, struct cfg80211_chan_def *def) { struct ath10k_vif *arvif = (void *)vif->drv_priv; const struct ieee80211_supported_band *sband; u8 basic_rate_idx; int hw_rate_code; u32 vdev_param; u16 bitrate; int ret; lockdep_assert_held(&ar->conf_mutex); sband = ar->hw->wiphy->bands[def->chan->band]; basic_rate_idx = ffs(vif->bss_conf.basic_rates) - 1; bitrate = sband->bitrates[basic_rate_idx].bitrate; hw_rate_code = ath10k_mac_get_rate_hw_value(bitrate); if (hw_rate_code < 0) { ath10k_warn(ar, "bitrate not supported %d\n", bitrate); return; } vdev_param = ar->wmi.vdev_param->mgmt_rate; ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, vdev_param, hw_rate_code); if (ret) ath10k_warn(ar, "failed to set mgmt tx rate %d\n", ret); } static void ath10k_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_bss_conf *info, u64 changed) { struct ath10k *ar = hw->priv; struct ath10k_vif *arvif = (void *)vif->drv_priv; struct cfg80211_chan_def def; u32 vdev_param, pdev_param, slottime, preamble; u16 bitrate, hw_value; u8 rate, rateidx; int ret = 0, mcast_rate; enum nl80211_band band; mutex_lock(&ar->conf_mutex); if (changed & BSS_CHANGED_IBSS) ath10k_control_ibss(arvif, vif); if (changed & BSS_CHANGED_BEACON_INT) { arvif->beacon_interval = info->beacon_int; vdev_param = ar->wmi.vdev_param->beacon_interval; ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, vdev_param, arvif->beacon_interval); ath10k_dbg(ar, ATH10K_DBG_MAC, "mac vdev %d beacon_interval %d\n", arvif->vdev_id, arvif->beacon_interval); if (ret) ath10k_warn(ar, "failed to set beacon interval for vdev %d: %i\n", arvif->vdev_id, ret); } if (changed & BSS_CHANGED_BEACON) { ath10k_dbg(ar, ATH10K_DBG_MAC, "vdev %d set beacon tx mode to staggered\n", arvif->vdev_id); pdev_param = ar->wmi.pdev_param->beacon_tx_mode; ret = ath10k_wmi_pdev_set_param(ar, pdev_param, WMI_BEACON_STAGGERED_MODE); if (ret) ath10k_warn(ar, "failed to set beacon mode for vdev %d: %i\n", arvif->vdev_id, ret); ret = ath10k_mac_setup_bcn_tmpl(arvif); if (ret) ath10k_warn(ar, "failed to update beacon template: %d\n", ret); if (ieee80211_vif_is_mesh(vif)) { /* mesh doesn't use SSID but firmware needs it */ arvif->u.ap.ssid_len = 4; memcpy(arvif->u.ap.ssid, "mesh", arvif->u.ap.ssid_len); } } if (changed & BSS_CHANGED_AP_PROBE_RESP) { ret = ath10k_mac_setup_prb_tmpl(arvif); if (ret) ath10k_warn(ar, "failed to setup probe resp template on vdev %i: %d\n", arvif->vdev_id, ret); } if (changed & (BSS_CHANGED_BEACON_INFO | BSS_CHANGED_BEACON)) { arvif->dtim_period = info->dtim_period; ath10k_dbg(ar, ATH10K_DBG_MAC, "mac vdev %d dtim_period %d\n", arvif->vdev_id, arvif->dtim_period); vdev_param = ar->wmi.vdev_param->dtim_period; ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, vdev_param, arvif->dtim_period); if (ret) ath10k_warn(ar, "failed to set dtim period for vdev %d: %i\n", arvif->vdev_id, ret); } if (changed & BSS_CHANGED_SSID && vif->type == NL80211_IFTYPE_AP) { arvif->u.ap.ssid_len = vif->cfg.ssid_len; if (vif->cfg.ssid_len) memcpy(arvif->u.ap.ssid, vif->cfg.ssid, vif->cfg.ssid_len); arvif->u.ap.hidden_ssid = info->hidden_ssid; } if (changed & BSS_CHANGED_BSSID && !is_zero_ether_addr(info->bssid)) ether_addr_copy(arvif->bssid, info->bssid); if (changed & BSS_CHANGED_FTM_RESPONDER && arvif->ftm_responder != info->ftm_responder && test_bit(WMI_SERVICE_RTT_RESPONDER_ROLE, ar->wmi.svc_map)) { arvif->ftm_responder = info->ftm_responder; vdev_param = ar->wmi.vdev_param->rtt_responder_role; ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, vdev_param, arvif->ftm_responder); ath10k_dbg(ar, ATH10K_DBG_MAC, "mac vdev %d ftm_responder %d:ret %d\n", arvif->vdev_id, arvif->ftm_responder, ret); } if (changed & BSS_CHANGED_BEACON_ENABLED) ath10k_control_beaconing(arvif, info); if (changed & BSS_CHANGED_ERP_CTS_PROT) { arvif->use_cts_prot = info->use_cts_prot; ret = ath10k_recalc_rtscts_prot(arvif); if (ret) ath10k_warn(ar, "failed to recalculate rts/cts prot for vdev %d: %d\n", arvif->vdev_id, ret); if (ath10k_mac_can_set_cts_prot(arvif)) { ret = ath10k_mac_set_cts_prot(arvif); if (ret) ath10k_warn(ar, "failed to set cts protection for vdev %d: %d\n", arvif->vdev_id, ret); } } if (changed & BSS_CHANGED_ERP_SLOT) { if (info->use_short_slot) slottime = WMI_VDEV_SLOT_TIME_SHORT; /* 9us */ else slottime = WMI_VDEV_SLOT_TIME_LONG; /* 20us */ ath10k_dbg(ar, ATH10K_DBG_MAC, "mac vdev %d slot_time %d\n", arvif->vdev_id, slottime); vdev_param = ar->wmi.vdev_param->slot_time; ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, vdev_param, slottime); if (ret) ath10k_warn(ar, "failed to set erp slot for vdev %d: %i\n", arvif->vdev_id, ret); } if (changed & BSS_CHANGED_ERP_PREAMBLE) { if (info->use_short_preamble) preamble = WMI_VDEV_PREAMBLE_SHORT; else preamble = WMI_VDEV_PREAMBLE_LONG; ath10k_dbg(ar, ATH10K_DBG_MAC, "mac vdev %d preamble %dn", arvif->vdev_id, preamble); vdev_param = ar->wmi.vdev_param->preamble; ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, vdev_param, preamble); if (ret) ath10k_warn(ar, "failed to set preamble for vdev %d: %i\n", arvif->vdev_id, ret); } if (changed & BSS_CHANGED_ASSOC) { if (vif->cfg.assoc) { /* Workaround: Make sure monitor vdev is not running * when associating to prevent some firmware revisions * (e.g. 10.1 and 10.2) from crashing. */ if (ar->monitor_started) ath10k_monitor_stop(ar); ath10k_bss_assoc(hw, vif, info); ath10k_monitor_recalc(ar); } else { ath10k_bss_disassoc(hw, vif); } } if (changed & BSS_CHANGED_TXPOWER) { ath10k_dbg(ar, ATH10K_DBG_MAC, "mac vdev_id %i txpower %d\n", arvif->vdev_id, info->txpower); arvif->txpower = info->txpower; ret = ath10k_mac_txpower_recalc(ar); if (ret) ath10k_warn(ar, "failed to recalc tx power: %d\n", ret); } if (changed & BSS_CHANGED_PS) { arvif->ps = vif->cfg.ps; ret = ath10k_config_ps(ar); if (ret) ath10k_warn(ar, "failed to setup ps on vdev %i: %d\n", arvif->vdev_id, ret); } if (changed & BSS_CHANGED_MCAST_RATE && !ath10k_mac_vif_chan(arvif->vif, &def)) { band = def.chan->band; mcast_rate = vif->bss_conf.mcast_rate[band]; if (mcast_rate > 0) rateidx = mcast_rate - 1; else rateidx = ffs(vif->bss_conf.basic_rates) - 1; if (ar->phy_capability & WHAL_WLAN_11A_CAPABILITY) rateidx += ATH10K_MAC_FIRST_OFDM_RATE_IDX; bitrate = ath10k_wmi_legacy_rates[rateidx].bitrate; hw_value = ath10k_wmi_legacy_rates[rateidx].hw_value; if (ath10k_mac_bitrate_is_cck(bitrate)) preamble = WMI_RATE_PREAMBLE_CCK; else preamble = WMI_RATE_PREAMBLE_OFDM; rate = ATH10K_HW_RATECODE(hw_value, 0, preamble); ath10k_dbg(ar, ATH10K_DBG_MAC, "mac vdev %d mcast_rate %x\n", arvif->vdev_id, rate); vdev_param = ar->wmi.vdev_param->mcast_data_rate; ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, vdev_param, rate); if (ret) ath10k_warn(ar, "failed to set mcast rate on vdev %i: %d\n", arvif->vdev_id, ret); vdev_param = ar->wmi.vdev_param->bcast_data_rate; ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, vdev_param, rate); if (ret) ath10k_warn(ar, "failed to set bcast rate on vdev %i: %d\n", arvif->vdev_id, ret); } if (changed & BSS_CHANGED_BASIC_RATES && !ath10k_mac_vif_chan(arvif->vif, &def)) ath10k_recalculate_mgmt_rate(ar, vif, &def); mutex_unlock(&ar->conf_mutex); } static void ath10k_mac_op_set_coverage_class(struct ieee80211_hw *hw, int radio_idx, s16 value) { struct ath10k *ar = hw->priv; /* This function should never be called if setting the coverage class * is not supported on this hardware. */ if (!ar->hw_params.hw_ops->set_coverage_class) { WARN_ON_ONCE(1); return; } ar->hw_params.hw_ops->set_coverage_class(ar, -1, value); } struct ath10k_mac_tdls_iter_data { u32 num_tdls_stations; struct ieee80211_vif *curr_vif; }; static void ath10k_mac_tdls_vif_stations_count_iter(void *data, struct ieee80211_sta *sta) { struct ath10k_mac_tdls_iter_data *iter_data = data; struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv; struct ieee80211_vif *sta_vif = arsta->arvif->vif; if (sta->tdls && sta_vif == iter_data->curr_vif) iter_data->num_tdls_stations++; } static int ath10k_mac_tdls_vif_stations_count(struct ieee80211_hw *hw, struct ieee80211_vif *vif) { struct ath10k_mac_tdls_iter_data data = {}; data.curr_vif = vif; ieee80211_iterate_stations_atomic(hw, ath10k_mac_tdls_vif_stations_count_iter, &data); return data.num_tdls_stations; } static int ath10k_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_scan_request *hw_req) { struct ath10k *ar = hw->priv; struct ath10k_vif *arvif = (void *)vif->drv_priv; struct cfg80211_scan_request *req = &hw_req->req; struct wmi_start_scan_arg *arg = NULL; int ret = 0; int i; u32 scan_timeout; mutex_lock(&ar->conf_mutex); if (ath10k_mac_tdls_vif_stations_count(hw, vif) > 0) { ret = -EBUSY; goto exit; } spin_lock_bh(&ar->data_lock); switch (ar->scan.state) { case ATH10K_SCAN_IDLE: reinit_completion(&ar->scan.started); reinit_completion(&ar->scan.completed); ar->scan.state = ATH10K_SCAN_STARTING; ar->scan.is_roc = false; ar->scan.vdev_id = arvif->vdev_id; ret = 0; break; case ATH10K_SCAN_STARTING: case ATH10K_SCAN_RUNNING: case ATH10K_SCAN_ABORTING: ret = -EBUSY; break; } spin_unlock_bh(&ar->data_lock); if (ret) goto exit; arg = kzalloc(sizeof(*arg), GFP_KERNEL); if (!arg) { ret = -ENOMEM; goto exit; } ath10k_wmi_start_scan_init(ar, arg); arg->vdev_id = arvif->vdev_id; arg->scan_id = ATH10K_SCAN_ID; if (req->ie_len) { arg->ie_len = req->ie_len; memcpy(arg->ie, req->ie, arg->ie_len); } if (req->n_ssids) { arg->n_ssids = req->n_ssids; for (i = 0; i < arg->n_ssids; i++) { arg->ssids[i].len = req->ssids[i].ssid_len; arg->ssids[i].ssid = req->ssids[i].ssid; } } else { arg->scan_ctrl_flags |= WMI_SCAN_FLAG_PASSIVE; } if (req->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) { arg->scan_ctrl_flags |= WMI_SCAN_ADD_SPOOFED_MAC_IN_PROBE_REQ; ether_addr_copy(arg->mac_addr.addr, req->mac_addr); ether_addr_copy(arg->mac_mask.addr, req->mac_addr_mask); } if (req->n_channels) { arg->n_channels = req->n_channels; for (i = 0; i < arg->n_channels; i++) arg->channels[i] = req->channels[i]->center_freq; } /* if duration is set, default dwell times will be overwritten */ if (req->duration) { arg->dwell_time_active = req->duration; arg->dwell_time_passive = req->duration; arg->burst_duration_ms = req->duration; scan_timeout = min_t(u32, arg->max_rest_time * (arg->n_channels - 1) + (req->duration + ATH10K_SCAN_CHANNEL_SWITCH_WMI_EVT_OVERHEAD) * arg->n_channels, arg->max_scan_time); } else { scan_timeout = arg->max_scan_time; } /* Add a 200ms margin to account for event/command processing */ scan_timeout += 200; ret = ath10k_start_scan(ar, arg); if (ret) { ath10k_warn(ar, "failed to start hw scan: %d\n", ret); spin_lock_bh(&ar->data_lock); ar->scan.state = ATH10K_SCAN_IDLE; spin_unlock_bh(&ar->data_lock); } ieee80211_queue_delayed_work(ar->hw, &ar->scan.timeout, msecs_to_jiffies(scan_timeout)); exit: kfree(arg); mutex_unlock(&ar->conf_mutex); return ret; } static void ath10k_cancel_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif) { struct ath10k *ar = hw->priv; mutex_lock(&ar->conf_mutex); ath10k_scan_abort(ar); mutex_unlock(&ar->conf_mutex); cancel_delayed_work_sync(&ar->scan.timeout); } static void ath10k_set_key_h_def_keyidx(struct ath10k *ar, struct ath10k_vif *arvif, enum set_key_cmd cmd, struct ieee80211_key_conf *key) { u32 vdev_param = arvif->ar->wmi.vdev_param->def_keyid; int ret; /* 10.1 firmware branch requires default key index to be set to group * key index after installing it. Otherwise FW/HW Txes corrupted * frames with multi-vif APs. This is not required for main firmware * branch (e.g. 636). * * This is also needed for 636 fw for IBSS-RSN to work more reliably. * * FIXME: It remains unknown if this is required for multi-vif STA * interfaces on 10.1. */ if (arvif->vdev_type != WMI_VDEV_TYPE_AP && arvif->vdev_type != WMI_VDEV_TYPE_IBSS) return; if (key->cipher == WLAN_CIPHER_SUITE_WEP40) return; if (key->cipher == WLAN_CIPHER_SUITE_WEP104) return; if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) return; if (cmd != SET_KEY) return; ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, vdev_param, key->keyidx); if (ret) ath10k_warn(ar, "failed to set vdev %i group key as default key: %d\n", arvif->vdev_id, ret); } static int ath10k_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, struct ieee80211_vif *vif, struct ieee80211_sta *sta, struct ieee80211_key_conf *key) { struct ath10k *ar = hw->priv; struct ath10k_vif *arvif = (void *)vif->drv_priv; struct ath10k_sta *arsta; struct ath10k_peer *peer; const u8 *peer_addr; bool is_wep = key->cipher == WLAN_CIPHER_SUITE_WEP40 || key->cipher == WLAN_CIPHER_SUITE_WEP104; int ret = 0; int ret2; u32 flags = 0; u32 flags2; /* this one needs to be done in software */ if (key->cipher == WLAN_CIPHER_SUITE_AES_CMAC || key->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || key->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256 || key->cipher == WLAN_CIPHER_SUITE_BIP_CMAC_256) return 1; if (arvif->nohwcrypt) return 1; if (key->keyidx > WMI_MAX_KEY_INDEX) return -ENOSPC; mutex_lock(&ar->conf_mutex); if (sta) { arsta = (struct ath10k_sta *)sta->drv_priv; peer_addr = sta->addr; spin_lock_bh(&ar->data_lock); arsta->ucast_cipher = key->cipher; spin_unlock_bh(&ar->data_lock); } else if (arvif->vdev_type == WMI_VDEV_TYPE_STA) { peer_addr = vif->bss_conf.bssid; } else { peer_addr = vif->addr; } key->hw_key_idx = key->keyidx; if (is_wep) { if (cmd == SET_KEY) arvif->wep_keys[key->keyidx] = key; else arvif->wep_keys[key->keyidx] = NULL; } /* the peer should not disappear in mid-way (unless FW goes awry) since * we already hold conf_mutex. we just make sure its there now. */ spin_lock_bh(&ar->data_lock); peer = ath10k_peer_find(ar, arvif->vdev_id, peer_addr); spin_unlock_bh(&ar->data_lock); if (!peer) { if (cmd == SET_KEY) { ath10k_warn(ar, "failed to install key for non-existent peer %pM\n", peer_addr); ret = -EOPNOTSUPP; goto exit; } else { /* if the peer doesn't exist there is no key to disable anymore */ goto exit; } } if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) flags |= WMI_KEY_PAIRWISE; else flags |= WMI_KEY_GROUP; if (is_wep) { if (cmd == DISABLE_KEY) ath10k_clear_vdev_key(arvif, key); /* When WEP keys are uploaded it's possible that there are * stations associated already (e.g. when merging) without any * keys. Static WEP needs an explicit per-peer key upload. */ if (vif->type == NL80211_IFTYPE_ADHOC && cmd == SET_KEY) ath10k_mac_vif_update_wep_key(arvif, key); /* 802.1x never sets the def_wep_key_idx so each set_key() * call changes default tx key. * * Static WEP sets def_wep_key_idx via .set_default_unicast_key * after first set_key(). */ if (cmd == SET_KEY && arvif->def_wep_key_idx == -1) flags |= WMI_KEY_TX_USAGE; } ret = ath10k_install_key(arvif, key, cmd, peer_addr, flags); if (ret) { WARN_ON(ret > 0); ath10k_warn(ar, "failed to install key for vdev %i peer %pM: %d\n", arvif->vdev_id, peer_addr, ret); goto exit; } /* mac80211 sets static WEP keys as groupwise while firmware requires * them to be installed twice as both pairwise and groupwise. */ if (is_wep && !sta && vif->type == NL80211_IFTYPE_STATION) { flags2 = flags; flags2 &= ~WMI_KEY_GROUP; flags2 |= WMI_KEY_PAIRWISE; ret = ath10k_install_key(arvif, key, cmd, peer_addr, flags2); if (ret) { WARN_ON(ret > 0); ath10k_warn(ar, "failed to install (ucast) key for vdev %i peer %pM: %d\n", arvif->vdev_id, peer_addr, ret); ret2 = ath10k_install_key(arvif, key, DISABLE_KEY, peer_addr, flags); if (ret2) { WARN_ON(ret2 > 0); ath10k_warn(ar, "failed to disable (mcast) key for vdev %i peer %pM: %d\n", arvif->vdev_id, peer_addr, ret2); } goto exit; } } ath10k_set_key_h_def_keyidx(ar, arvif, cmd, key); spin_lock_bh(&ar->data_lock); peer = ath10k_peer_find(ar, arvif->vdev_id, peer_addr); if (peer && cmd == SET_KEY) peer->keys[key->keyidx] = key; else if (peer && cmd == DISABLE_KEY) peer->keys[key->keyidx] = NULL; else if (peer == NULL) /* impossible unless FW goes crazy */ ath10k_warn(ar, "Peer %pM disappeared!\n", peer_addr); spin_unlock_bh(&ar->data_lock); if (sta && sta->tdls) ath10k_wmi_peer_set_param(ar, arvif->vdev_id, sta->addr, ar->wmi.peer_param->authorize, 1); else if (sta && cmd == SET_KEY && (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) ath10k_wmi_peer_set_param(ar, arvif->vdev_id, peer_addr, ar->wmi.peer_param->authorize, 1); exit: mutex_unlock(&ar->conf_mutex); return ret; } static void ath10k_set_default_unicast_key(struct ieee80211_hw *hw, struct ieee80211_vif *vif, int keyidx) { struct ath10k *ar = hw->priv; struct ath10k_vif *arvif = (void *)vif->drv_priv; int ret; mutex_lock(&arvif->ar->conf_mutex); if (arvif->ar->state != ATH10K_STATE_ON) goto unlock; ath10k_dbg(ar, ATH10K_DBG_MAC, "mac vdev %d set keyidx %d\n", arvif->vdev_id, keyidx); ret = ath10k_wmi_vdev_set_param(arvif->ar, arvif->vdev_id, arvif->ar->wmi.vdev_param->def_keyid, keyidx); if (ret) { ath10k_warn(ar, "failed to update wep key index for vdev %d: %d\n", arvif->vdev_id, ret); goto unlock; } arvif->def_wep_key_idx = keyidx; unlock: mutex_unlock(&arvif->ar->conf_mutex); } static void ath10k_sta_rc_update_wk(struct work_struct *wk) { struct ath10k *ar; struct ath10k_vif *arvif; struct ath10k_sta *arsta; struct ieee80211_sta *sta; struct cfg80211_chan_def def; enum nl80211_band band; const u8 *ht_mcs_mask; const u16 *vht_mcs_mask; u32 changed, bw, nss, smps; int err; arsta = container_of(wk, struct ath10k_sta, update_wk); sta = container_of((void *)arsta, struct ieee80211_sta, drv_priv); arvif = arsta->arvif; ar = arvif->ar; if (WARN_ON(ath10k_mac_vif_chan(arvif->vif, &def))) return; band = def.chan->band; ht_mcs_mask = arvif->bitrate_mask.control[band].ht_mcs; vht_mcs_mask = arvif->bitrate_mask.control[band].vht_mcs; spin_lock_bh(&ar->data_lock); changed = arsta->changed; arsta->changed = 0; bw = arsta->bw; nss = arsta->nss; smps = arsta->smps; spin_unlock_bh(&ar->data_lock); mutex_lock(&ar->conf_mutex); nss = max_t(u32, 1, nss); nss = min(nss, max(ath10k_mac_max_ht_nss(ht_mcs_mask), ath10k_mac_max_vht_nss(vht_mcs_mask))); if (changed & IEEE80211_RC_BW_CHANGED) { enum wmi_phy_mode mode; mode = chan_to_phymode(&def); ath10k_dbg(ar, ATH10K_DBG_STA, "mac update sta %pM peer bw %d phymode %d\n", sta->addr, bw, mode); err = ath10k_wmi_peer_set_param(ar, arvif->vdev_id, sta->addr, ar->wmi.peer_param->phymode, mode); if (err) { ath10k_warn(ar, "failed to update STA %pM peer phymode %d: %d\n", sta->addr, mode, err); goto exit; } err = ath10k_wmi_peer_set_param(ar, arvif->vdev_id, sta->addr, ar->wmi.peer_param->chan_width, bw); if (err) ath10k_warn(ar, "failed to update STA %pM peer bw %d: %d\n", sta->addr, bw, err); } if (changed & IEEE80211_RC_NSS_CHANGED) { ath10k_dbg(ar, ATH10K_DBG_STA, "mac update sta %pM nss %d\n", sta->addr, nss); err = ath10k_wmi_peer_set_param(ar, arvif->vdev_id, sta->addr, ar->wmi.peer_param->nss, nss); if (err) ath10k_warn(ar, "failed to update STA %pM nss %d: %d\n", sta->addr, nss, err); } if (changed & IEEE80211_RC_SMPS_CHANGED) { ath10k_dbg(ar, ATH10K_DBG_STA, "mac update sta %pM smps %d\n", sta->addr, smps); err = ath10k_wmi_peer_set_param(ar, arvif->vdev_id, sta->addr, ar->wmi.peer_param->smps_state, smps); if (err) ath10k_warn(ar, "failed to update STA %pM smps %d: %d\n", sta->addr, smps, err); } if (changed & IEEE80211_RC_SUPP_RATES_CHANGED) { ath10k_dbg(ar, ATH10K_DBG_STA, "mac update sta %pM supp rates\n", sta->addr); err = ath10k_station_assoc(ar, arvif->vif, sta, true); if (err) ath10k_warn(ar, "failed to reassociate station: %pM\n", sta->addr); } exit: mutex_unlock(&ar->conf_mutex); } static int ath10k_mac_inc_num_stations(struct ath10k_vif *arvif, struct ieee80211_sta *sta) { struct ath10k *ar = arvif->ar; lockdep_assert_held(&ar->conf_mutex); if (arvif->vdev_type == WMI_VDEV_TYPE_STA && !sta->tdls) return 0; if (ar->num_stations >= ar->max_num_stations) return -ENOBUFS; ar->num_stations++; return 0; } static void ath10k_mac_dec_num_stations(struct ath10k_vif *arvif, struct ieee80211_sta *sta) { struct ath10k *ar = arvif->ar; lockdep_assert_held(&ar->conf_mutex); if (arvif->vdev_type == WMI_VDEV_TYPE_STA && !sta->tdls) return; ar->num_stations--; } static int ath10k_sta_set_txpwr(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_sta *sta) { struct ath10k *ar = hw->priv; struct ath10k_vif *arvif = (void *)vif->drv_priv; int ret = 0; s16 txpwr; if (sta->deflink.txpwr.type == NL80211_TX_POWER_AUTOMATIC) { txpwr = 0; } else { txpwr = sta->deflink.txpwr.power; if (!txpwr) return -EINVAL; } if (txpwr > ATH10K_TX_POWER_MAX_VAL || txpwr < ATH10K_TX_POWER_MIN_VAL) return -EINVAL; mutex_lock(&ar->conf_mutex); ret = ath10k_wmi_peer_set_param(ar, arvif->vdev_id, sta->addr, ar->wmi.peer_param->use_fixed_power, txpwr); if (ret) { ath10k_warn(ar, "failed to set tx power for station ret: %d\n", ret); goto out; } out: mutex_unlock(&ar->conf_mutex); return ret; } struct ath10k_mac_iter_tid_conf_data { struct ieee80211_vif *curr_vif; struct ath10k *ar; bool reset_config; }; static bool ath10k_mac_bitrate_mask_has_single_rate(struct ath10k *ar, enum nl80211_band band, const struct cfg80211_bitrate_mask *mask, int *vht_num_rates) { int num_rates = 0; int i, tmp; num_rates += hweight32(mask->control[band].legacy); for (i = 0; i < ARRAY_SIZE(mask->control[band].ht_mcs); i++) num_rates += hweight8(mask->control[band].ht_mcs[i]); *vht_num_rates = 0; for (i = 0; i < ARRAY_SIZE(mask->control[band].vht_mcs); i++) { tmp = hweight16(mask->control[band].vht_mcs[i]); num_rates += tmp; *vht_num_rates += tmp; } return num_rates == 1; } static int ath10k_mac_bitrate_mask_get_single_rate(struct ath10k *ar, enum nl80211_band band, const struct cfg80211_bitrate_mask *mask, u8 *rate, u8 *nss, bool vht_only) { int rate_idx; int i; u16 bitrate; u8 preamble; u8 hw_rate; if (vht_only) goto next; if (hweight32(mask->control[band].legacy) == 1) { rate_idx = ffs(mask->control[band].legacy) - 1; if (ar->phy_capability & WHAL_WLAN_11A_CAPABILITY) rate_idx += ATH10K_MAC_FIRST_OFDM_RATE_IDX; hw_rate = ath10k_wmi_legacy_rates[rate_idx].hw_value; bitrate = ath10k_wmi_legacy_rates[rate_idx].bitrate; if (ath10k_mac_bitrate_is_cck(bitrate)) preamble = WMI_RATE_PREAMBLE_CCK; else preamble = WMI_RATE_PREAMBLE_OFDM; *nss = 1; *rate = preamble << 6 | (*nss - 1) << 4 | hw_rate << 0; return 0; } for (i = 0; i < ARRAY_SIZE(mask->control[band].ht_mcs); i++) { if (hweight8(mask->control[band].ht_mcs[i]) == 1) { *nss = i + 1; *rate = WMI_RATE_PREAMBLE_HT << 6 | (*nss - 1) << 4 | (ffs(mask->control[band].ht_mcs[i]) - 1); return 0; } } next: for (i = 0; i < ARRAY_SIZE(mask->control[band].vht_mcs); i++) { if (hweight16(mask->control[band].vht_mcs[i]) == 1) { *nss = i + 1; *rate = WMI_RATE_PREAMBLE_VHT << 6 | (*nss - 1) << 4 | (ffs(mask->control[band].vht_mcs[i]) - 1); return 0; } } return -EINVAL; } static int ath10k_mac_validate_rate_mask(struct ath10k *ar, struct ieee80211_sta *sta, u32 rate_ctrl_flag, u8 nss) { struct ieee80211_sta_ht_cap *ht_cap = &sta->deflink.ht_cap; struct ieee80211_sta_vht_cap *vht_cap = &sta->deflink.vht_cap; if (nss > sta->deflink.rx_nss) { ath10k_warn(ar, "Invalid nss field, configured %u limit %u\n", nss, sta->deflink.rx_nss); return -EINVAL; } if (ATH10K_HW_PREAMBLE(rate_ctrl_flag) == WMI_RATE_PREAMBLE_VHT) { if (!vht_cap->vht_supported) { ath10k_warn(ar, "Invalid VHT rate for sta %pM\n", sta->addr); return -EINVAL; } } else if (ATH10K_HW_PREAMBLE(rate_ctrl_flag) == WMI_RATE_PREAMBLE_HT) { if (!ht_cap->ht_supported || vht_cap->vht_supported) { ath10k_warn(ar, "Invalid HT rate for sta %pM\n", sta->addr); return -EINVAL; } } else { if (ht_cap->ht_supported || vht_cap->vht_supported) return -EINVAL; } return 0; } static int ath10k_mac_tid_bitrate_config(struct ath10k *ar, struct ieee80211_vif *vif, struct ieee80211_sta *sta, u32 *rate_ctrl_flag, u8 *rate_ctrl, enum nl80211_tx_rate_setting txrate_type, const struct cfg80211_bitrate_mask *mask) { struct cfg80211_chan_def def; enum nl80211_band band; u8 nss, rate; int vht_num_rates, ret; if (WARN_ON(ath10k_mac_vif_chan(vif, &def))) return -EINVAL; if (txrate_type == NL80211_TX_RATE_AUTOMATIC) { *rate_ctrl = WMI_TID_CONFIG_RATE_CONTROL_AUTO; *rate_ctrl_flag = 0; return 0; } band = def.chan->band; if (!ath10k_mac_bitrate_mask_has_single_rate(ar, band, mask, &vht_num_rates)) { return -EINVAL; } ret = ath10k_mac_bitrate_mask_get_single_rate(ar, band, mask, &rate, &nss, false); if (ret) { ath10k_warn(ar, "failed to get single rate: %d\n", ret); return ret; } *rate_ctrl_flag = rate; if (sta && ath10k_mac_validate_rate_mask(ar, sta, *rate_ctrl_flag, nss)) return -EINVAL; if (txrate_type == NL80211_TX_RATE_FIXED) *rate_ctrl = WMI_TID_CONFIG_RATE_CONTROL_FIXED_RATE; else if (txrate_type == NL80211_TX_RATE_LIMITED && (test_bit(WMI_SERVICE_EXT_PEER_TID_CONFIGS_SUPPORT, ar->wmi.svc_map))) *rate_ctrl = WMI_PEER_TID_CONFIG_RATE_UPPER_CAP; else return -EOPNOTSUPP; return 0; } static int ath10k_mac_set_tid_config(struct ath10k *ar, struct ieee80211_sta *sta, struct ieee80211_vif *vif, u32 changed, struct wmi_per_peer_per_tid_cfg_arg *arg) { struct ath10k_vif *arvif = (void *)vif->drv_priv; struct ath10k_sta *arsta; int ret; if (sta) { if (!sta->wme) return -EOPNOTSUPP; arsta = (struct ath10k_sta *)sta->drv_priv; if (changed & BIT(NL80211_TID_CONFIG_ATTR_NOACK)) { if ((arsta->retry_long[arg->tid] > 0 || arsta->rate_code[arg->tid] > 0 || arsta->ampdu[arg->tid] == WMI_TID_CONFIG_AGGR_CONTROL_ENABLE) && arg->ack_policy == WMI_PEER_TID_CONFIG_NOACK) { changed &= ~BIT(NL80211_TID_CONFIG_ATTR_NOACK); arg->ack_policy = 0; arg->aggr_control = 0; arg->rate_ctrl = 0; arg->rcode_flags = 0; } } if (changed & BIT(NL80211_TID_CONFIG_ATTR_AMPDU_CTRL)) { if (arsta->noack[arg->tid] == WMI_PEER_TID_CONFIG_NOACK || arvif->noack[arg->tid] == WMI_PEER_TID_CONFIG_NOACK) { arg->aggr_control = 0; changed &= ~BIT(NL80211_TID_CONFIG_ATTR_RETRY_LONG); } } if (changed & (BIT(NL80211_TID_CONFIG_ATTR_TX_RATE) | BIT(NL80211_TID_CONFIG_ATTR_TX_RATE_TYPE))) { if (arsta->noack[arg->tid] == WMI_PEER_TID_CONFIG_NOACK || arvif->noack[arg->tid] == WMI_PEER_TID_CONFIG_NOACK) { arg->rate_ctrl = 0; arg->rcode_flags = 0; } } ether_addr_copy(arg->peer_macaddr.addr, sta->addr); ret = ath10k_wmi_set_per_peer_per_tid_cfg(ar, arg); if (ret) return ret; /* Store the configured parameters in success case */ if (changed & BIT(NL80211_TID_CONFIG_ATTR_NOACK)) { arsta->noack[arg->tid] = arg->ack_policy; arg->ack_policy = 0; arg->aggr_control = 0; arg->rate_ctrl = 0; arg->rcode_flags = 0; } if (changed & BIT(NL80211_TID_CONFIG_ATTR_RETRY_LONG)) { arsta->retry_long[arg->tid] = arg->retry_count; arg->retry_count = 0; } if (changed & BIT(NL80211_TID_CONFIG_ATTR_AMPDU_CTRL)) { arsta->ampdu[arg->tid] = arg->aggr_control; arg->aggr_control = 0; } if (changed & (BIT(NL80211_TID_CONFIG_ATTR_TX_RATE) | BIT(NL80211_TID_CONFIG_ATTR_TX_RATE_TYPE))) { arsta->rate_ctrl[arg->tid] = arg->rate_ctrl; arg->rate_ctrl = 0; arg->rcode_flags = 0; } if (changed & BIT(NL80211_TID_CONFIG_ATTR_RTSCTS_CTRL)) { arsta->rtscts[arg->tid] = arg->rtscts_ctrl; arg->ext_tid_cfg_bitmap = 0; } } else { if (changed & BIT(NL80211_TID_CONFIG_ATTR_NOACK)) { if ((arvif->retry_long[arg->tid] || arvif->rate_code[arg->tid] || arvif->ampdu[arg->tid] == WMI_TID_CONFIG_AGGR_CONTROL_ENABLE) && arg->ack_policy == WMI_PEER_TID_CONFIG_NOACK) { changed &= ~BIT(NL80211_TID_CONFIG_ATTR_NOACK); } else { arvif->noack[arg->tid] = arg->ack_policy; arvif->ampdu[arg->tid] = arg->aggr_control; arvif->rate_ctrl[arg->tid] = arg->rate_ctrl; } } if (changed & BIT(NL80211_TID_CONFIG_ATTR_RETRY_LONG)) { if (arvif->noack[arg->tid] == WMI_PEER_TID_CONFIG_NOACK) changed &= ~BIT(NL80211_TID_CONFIG_ATTR_RETRY_LONG); else arvif->retry_long[arg->tid] = arg->retry_count; } if (changed & BIT(NL80211_TID_CONFIG_ATTR_AMPDU_CTRL)) { if (arvif->noack[arg->tid] == WMI_PEER_TID_CONFIG_NOACK) changed &= ~BIT(NL80211_TID_CONFIG_ATTR_AMPDU_CTRL); else arvif->ampdu[arg->tid] = arg->aggr_control; } if (changed & (BIT(NL80211_TID_CONFIG_ATTR_TX_RATE) | BIT(NL80211_TID_CONFIG_ATTR_TX_RATE_TYPE))) { if (arvif->noack[arg->tid] == WMI_PEER_TID_CONFIG_NOACK) { changed &= ~(BIT(NL80211_TID_CONFIG_ATTR_TX_RATE) | BIT(NL80211_TID_CONFIG_ATTR_TX_RATE_TYPE)); } else { arvif->rate_ctrl[arg->tid] = arg->rate_ctrl; arvif->rate_code[arg->tid] = arg->rcode_flags; } } if (changed & BIT(NL80211_TID_CONFIG_ATTR_RTSCTS_CTRL)) { arvif->rtscts[arg->tid] = arg->rtscts_ctrl; arg->ext_tid_cfg_bitmap = 0; } if (changed) arvif->tid_conf_changed[arg->tid] |= changed; } return 0; } static int ath10k_mac_parse_tid_config(struct ath10k *ar, struct ieee80211_sta *sta, struct ieee80211_vif *vif, struct cfg80211_tid_cfg *tid_conf, struct wmi_per_peer_per_tid_cfg_arg *arg) { u32 changed = tid_conf->mask; int ret = 0, i = 0; if (!changed) return -EINVAL; while (i < ATH10K_TID_MAX) { if (!(tid_conf->tids & BIT(i))) { i++; continue; } arg->tid = i; if (changed & BIT(NL80211_TID_CONFIG_ATTR_NOACK)) { if (tid_conf->noack == NL80211_TID_CONFIG_ENABLE) { arg->ack_policy = WMI_PEER_TID_CONFIG_NOACK; arg->rate_ctrl = WMI_TID_CONFIG_RATE_CONTROL_DEFAULT_LOWEST_RATE; arg->aggr_control = WMI_TID_CONFIG_AGGR_CONTROL_DISABLE; } else { arg->ack_policy = WMI_PEER_TID_CONFIG_ACK; arg->rate_ctrl = WMI_TID_CONFIG_RATE_CONTROL_AUTO; arg->aggr_control = WMI_TID_CONFIG_AGGR_CONTROL_ENABLE; } } if (changed & BIT(NL80211_TID_CONFIG_ATTR_RETRY_LONG)) arg->retry_count = tid_conf->retry_long; if (changed & BIT(NL80211_TID_CONFIG_ATTR_AMPDU_CTRL)) { if (tid_conf->noack == NL80211_TID_CONFIG_ENABLE) arg->aggr_control = WMI_TID_CONFIG_AGGR_CONTROL_ENABLE; else arg->aggr_control = WMI_TID_CONFIG_AGGR_CONTROL_DISABLE; } if (changed & (BIT(NL80211_TID_CONFIG_ATTR_TX_RATE) | BIT(NL80211_TID_CONFIG_ATTR_TX_RATE_TYPE))) { ret = ath10k_mac_tid_bitrate_config(ar, vif, sta, &arg->rcode_flags, &arg->rate_ctrl, tid_conf->txrate_type, &tid_conf->txrate_mask); if (ret) { ath10k_warn(ar, "failed to configure bitrate mask %d\n", ret); arg->rcode_flags = 0; arg->rate_ctrl = 0; } } if (changed & BIT(NL80211_TID_CONFIG_ATTR_RTSCTS_CTRL)) { if (tid_conf->rtscts) arg->rtscts_ctrl = tid_conf->rtscts; arg->ext_tid_cfg_bitmap = WMI_EXT_TID_RTS_CTS_CONFIG; } ret = ath10k_mac_set_tid_config(ar, sta, vif, changed, arg); if (ret) return ret; i++; } return ret; } static int ath10k_mac_reset_tid_config(struct ath10k *ar, struct ieee80211_sta *sta, struct ath10k_vif *arvif, u8 tids) { struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv; struct wmi_per_peer_per_tid_cfg_arg arg; int ret = 0, i = 0; arg.vdev_id = arvif->vdev_id; while (i < ATH10K_TID_MAX) { if (!(tids & BIT(i))) { i++; continue; } arg.tid = i; arg.ack_policy = WMI_PEER_TID_CONFIG_ACK; arg.retry_count = ATH10K_MAX_RETRY_COUNT; arg.rate_ctrl = WMI_TID_CONFIG_RATE_CONTROL_AUTO; arg.aggr_control = WMI_TID_CONFIG_AGGR_CONTROL_ENABLE; arg.rtscts_ctrl = WMI_TID_CONFIG_RTSCTS_CONTROL_ENABLE; arg.ext_tid_cfg_bitmap = WMI_EXT_TID_RTS_CTS_CONFIG; ether_addr_copy(arg.peer_macaddr.addr, sta->addr); ret = ath10k_wmi_set_per_peer_per_tid_cfg(ar, &arg); if (ret) return ret; if (!arvif->tids_rst) { arsta->retry_long[i] = -1; arsta->noack[i] = -1; arsta->ampdu[i] = -1; arsta->rate_code[i] = -1; arsta->rate_ctrl[i] = 0; arsta->rtscts[i] = -1; } else { arvif->retry_long[i] = 0; arvif->noack[i] = 0; arvif->ampdu[i] = 0; arvif->rate_code[i] = 0; arvif->rate_ctrl[i] = 0; arvif->rtscts[i] = 0; } i++; } return ret; } static void ath10k_sta_tid_cfg_wk(struct work_struct *wk) { struct wmi_per_peer_per_tid_cfg_arg arg = {}; struct ieee80211_sta *sta; struct ath10k_sta *arsta; struct ath10k_vif *arvif; struct ath10k *ar; bool config_apply; int ret, i; u32 changed; u8 nss; arsta = container_of(wk, struct ath10k_sta, tid_config_wk); sta = container_of((void *)arsta, struct ieee80211_sta, drv_priv); arvif = arsta->arvif; ar = arvif->ar; mutex_lock(&ar->conf_mutex); if (arvif->tids_rst) { ret = ath10k_mac_reset_tid_config(ar, sta, arvif, arvif->tids_rst); goto exit; } ether_addr_copy(arg.peer_macaddr.addr, sta->addr); for (i = 0; i < ATH10K_TID_MAX; i++) { config_apply = false; changed = arvif->tid_conf_changed[i]; if (changed & BIT(NL80211_TID_CONFIG_ATTR_NOACK)) { if (arsta->noack[i] != -1) { arg.ack_policy = 0; } else { config_apply = true; arg.ack_policy = arvif->noack[i]; arg.aggr_control = arvif->ampdu[i]; arg.rate_ctrl = arvif->rate_ctrl[i]; } } if (changed & BIT(NL80211_TID_CONFIG_ATTR_RETRY_LONG)) { if (arsta->retry_long[i] != -1 || arsta->noack[i] == WMI_PEER_TID_CONFIG_NOACK || arvif->noack[i] == WMI_PEER_TID_CONFIG_NOACK) { arg.retry_count = 0; } else { arg.retry_count = arvif->retry_long[i]; config_apply = true; } } if (changed & BIT(NL80211_TID_CONFIG_ATTR_AMPDU_CTRL)) { if (arsta->ampdu[i] != -1 || arsta->noack[i] == WMI_PEER_TID_CONFIG_NOACK || arvif->noack[i] == WMI_PEER_TID_CONFIG_NOACK) { arg.aggr_control = 0; } else { arg.aggr_control = arvif->ampdu[i]; config_apply = true; } } if (changed & (BIT(NL80211_TID_CONFIG_ATTR_TX_RATE) | BIT(NL80211_TID_CONFIG_ATTR_TX_RATE_TYPE))) { nss = ATH10K_HW_NSS(arvif->rate_code[i]); ret = ath10k_mac_validate_rate_mask(ar, sta, arvif->rate_code[i], nss); if (ret && arvif->rate_ctrl[i] > WMI_TID_CONFIG_RATE_CONTROL_AUTO) { arg.rate_ctrl = 0; arg.rcode_flags = 0; } if (arsta->rate_ctrl[i] > WMI_TID_CONFIG_RATE_CONTROL_AUTO || arsta->noack[i] == WMI_PEER_TID_CONFIG_NOACK || arvif->noack[i] == WMI_PEER_TID_CONFIG_NOACK) { arg.rate_ctrl = 0; arg.rcode_flags = 0; } else { arg.rate_ctrl = arvif->rate_ctrl[i]; arg.rcode_flags = arvif->rate_code[i]; config_apply = true; } } if (changed & BIT(NL80211_TID_CONFIG_ATTR_RTSCTS_CTRL)) { if (arsta->rtscts[i]) { arg.rtscts_ctrl = 0; arg.ext_tid_cfg_bitmap = 0; } else { arg.rtscts_ctrl = arvif->rtscts[i] - 1; arg.ext_tid_cfg_bitmap = WMI_EXT_TID_RTS_CTS_CONFIG; config_apply = true; } } arg.tid = i; if (config_apply) { ret = ath10k_wmi_set_per_peer_per_tid_cfg(ar, &arg); if (ret) ath10k_warn(ar, "failed to set per tid config for sta %pM: %d\n", sta->addr, ret); } arg.ack_policy = 0; arg.retry_count = 0; arg.aggr_control = 0; arg.rate_ctrl = 0; arg.rcode_flags = 0; } exit: mutex_unlock(&ar->conf_mutex); } static void ath10k_mac_vif_stations_tid_conf(void *data, struct ieee80211_sta *sta) { struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv; struct ath10k_mac_iter_tid_conf_data *iter_data = data; struct ieee80211_vif *sta_vif = arsta->arvif->vif; if (sta_vif != iter_data->curr_vif || !sta->wme) return; ieee80211_queue_work(iter_data->ar->hw, &arsta->tid_config_wk); } static int ath10k_sta_state(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_sta *sta, enum ieee80211_sta_state old_state, enum ieee80211_sta_state new_state) { struct ath10k *ar = hw->priv; struct ath10k_vif *arvif = (void *)vif->drv_priv; struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv; struct ath10k_peer *peer; int ret = 0; int i; if (old_state == IEEE80211_STA_NOTEXIST && new_state == IEEE80211_STA_NONE) { memset(arsta, 0, sizeof(*arsta)); arsta->arvif = arvif; arsta->peer_ps_state = WMI_PEER_PS_STATE_DISABLED; INIT_WORK(&arsta->update_wk, ath10k_sta_rc_update_wk); INIT_WORK(&arsta->tid_config_wk, ath10k_sta_tid_cfg_wk); for (i = 0; i < ARRAY_SIZE(sta->txq); i++) ath10k_mac_txq_init(sta->txq[i]); } /* cancel must be done outside the mutex to avoid deadlock */ if ((old_state == IEEE80211_STA_NONE && new_state == IEEE80211_STA_NOTEXIST)) { cancel_work_sync(&arsta->update_wk); cancel_work_sync(&arsta->tid_config_wk); } mutex_lock(&ar->conf_mutex); if (old_state == IEEE80211_STA_NOTEXIST && new_state == IEEE80211_STA_NONE) { /* * New station addition. */ enum wmi_peer_type peer_type = WMI_PEER_TYPE_DEFAULT; u32 num_tdls_stations; ath10k_dbg(ar, ATH10K_DBG_STA, "mac vdev %d peer create %pM (new sta) sta %d / %d peer %d / %d\n", arvif->vdev_id, sta->addr, ar->num_stations + 1, ar->max_num_stations, ar->num_peers + 1, ar->max_num_peers); num_tdls_stations = ath10k_mac_tdls_vif_stations_count(hw, vif); if (sta->tdls) { if (num_tdls_stations >= ar->max_num_tdls_vdevs) { ath10k_warn(ar, "vdev %i exceeded maximum number of tdls vdevs %i\n", arvif->vdev_id, ar->max_num_tdls_vdevs); ret = -ELNRNG; goto exit; } peer_type = WMI_PEER_TYPE_TDLS; } ret = ath10k_mac_inc_num_stations(arvif, sta); if (ret) { ath10k_warn(ar, "refusing to associate station: too many connected already (%d)\n", ar->max_num_stations); goto exit; } if (ath10k_debug_is_extd_tx_stats_enabled(ar)) { arsta->tx_stats = kzalloc(sizeof(*arsta->tx_stats), GFP_KERNEL); if (!arsta->tx_stats) { ath10k_mac_dec_num_stations(arvif, sta); ret = -ENOMEM; goto exit; } } ret = ath10k_peer_create(ar, vif, sta, arvif->vdev_id, sta->addr, peer_type); if (ret) { ath10k_warn(ar, "failed to add peer %pM for vdev %d when adding a new sta: %i\n", sta->addr, arvif->vdev_id, ret); ath10k_mac_dec_num_stations(arvif, sta); kfree(arsta->tx_stats); goto exit; } spin_lock_bh(&ar->data_lock); peer = ath10k_peer_find(ar, arvif->vdev_id, sta->addr); if (!peer) { ath10k_warn(ar, "failed to lookup peer %pM on vdev %i\n", vif->addr, arvif->vdev_id); spin_unlock_bh(&ar->data_lock); ath10k_peer_delete(ar, arvif->vdev_id, sta->addr); ath10k_mac_dec_num_stations(arvif, sta); kfree(arsta->tx_stats); ret = -ENOENT; goto exit; } arsta->peer_id = find_first_bit(peer->peer_ids, ATH10K_MAX_NUM_PEER_IDS); spin_unlock_bh(&ar->data_lock); if (!sta->tdls) goto exit; ret = ath10k_wmi_update_fw_tdls_state(ar, arvif->vdev_id, WMI_TDLS_ENABLE_ACTIVE); if (ret) { ath10k_warn(ar, "failed to update fw tdls state on vdev %i: %i\n", arvif->vdev_id, ret); ath10k_peer_delete(ar, arvif->vdev_id, sta->addr); ath10k_mac_dec_num_stations(arvif, sta); kfree(arsta->tx_stats); goto exit; } ret = ath10k_mac_tdls_peer_update(ar, arvif->vdev_id, sta, WMI_TDLS_PEER_STATE_PEERING); if (ret) { ath10k_warn(ar, "failed to update tdls peer %pM for vdev %d when adding a new sta: %i\n", sta->addr, arvif->vdev_id, ret); ath10k_peer_delete(ar, arvif->vdev_id, sta->addr); ath10k_mac_dec_num_stations(arvif, sta); kfree(arsta->tx_stats); if (num_tdls_stations != 0) goto exit; ath10k_wmi_update_fw_tdls_state(ar, arvif->vdev_id, WMI_TDLS_DISABLE); } } else if ((old_state == IEEE80211_STA_NONE && new_state == IEEE80211_STA_NOTEXIST)) { /* * Existing station deletion. */ ath10k_dbg(ar, ATH10K_DBG_STA, "mac vdev %d peer delete %pM sta %p (sta gone)\n", arvif->vdev_id, sta->addr, sta); if (sta->tdls) { ret = ath10k_mac_tdls_peer_update(ar, arvif->vdev_id, sta, WMI_TDLS_PEER_STATE_TEARDOWN); if (ret) ath10k_warn(ar, "failed to update tdls peer state for %pM state %d: %i\n", sta->addr, WMI_TDLS_PEER_STATE_TEARDOWN, ret); } ret = ath10k_peer_delete(ar, arvif->vdev_id, sta->addr); if (ret) ath10k_warn(ar, "failed to delete peer %pM for vdev %d: %i\n", sta->addr, arvif->vdev_id, ret); ath10k_mac_dec_num_stations(arvif, sta); spin_lock_bh(&ar->data_lock); for (i = 0; i < ARRAY_SIZE(ar->peer_map); i++) { peer = ar->peer_map[i]; if (!peer) continue; if (peer->sta == sta) { ath10k_warn(ar, "found sta peer %pM (ptr %p id %d) entry on vdev %i after it was supposedly removed\n", sta->addr, peer, i, arvif->vdev_id); peer->sta = NULL; /* Clean up the peer object as well since we * must have failed to do this above. */ ath10k_peer_map_cleanup(ar, peer); } } spin_unlock_bh(&ar->data_lock); if (ath10k_debug_is_extd_tx_stats_enabled(ar)) { kfree(arsta->tx_stats); arsta->tx_stats = NULL; } for (i = 0; i < ARRAY_SIZE(sta->txq); i++) ath10k_mac_txq_unref(ar, sta->txq[i]); if (!sta->tdls) goto exit; if (ath10k_mac_tdls_vif_stations_count(hw, vif)) goto exit; /* This was the last tdls peer in current vif */ ret = ath10k_wmi_update_fw_tdls_state(ar, arvif->vdev_id, WMI_TDLS_DISABLE); if (ret) { ath10k_warn(ar, "failed to update fw tdls state on vdev %i: %i\n", arvif->vdev_id, ret); } } else if (old_state == IEEE80211_STA_AUTH && new_state == IEEE80211_STA_ASSOC && (vif->type == NL80211_IFTYPE_AP || vif->type == NL80211_IFTYPE_MESH_POINT || vif->type == NL80211_IFTYPE_ADHOC)) { /* * New association. */ ath10k_dbg(ar, ATH10K_DBG_STA, "mac sta %pM associated\n", sta->addr); ret = ath10k_station_assoc(ar, vif, sta, false); if (ret) ath10k_warn(ar, "failed to associate station %pM for vdev %i: %i\n", sta->addr, arvif->vdev_id, ret); } else if (old_state == IEEE80211_STA_ASSOC && new_state == IEEE80211_STA_AUTHORIZED && sta->tdls) { /* * Tdls station authorized. */ ath10k_dbg(ar, ATH10K_DBG_STA, "mac tdls sta %pM authorized\n", sta->addr); ret = ath10k_station_assoc(ar, vif, sta, false); if (ret) { ath10k_warn(ar, "failed to associate tdls station %pM for vdev %i: %i\n", sta->addr, arvif->vdev_id, ret); goto exit; } ret = ath10k_mac_tdls_peer_update(ar, arvif->vdev_id, sta, WMI_TDLS_PEER_STATE_CONNECTED); if (ret) ath10k_warn(ar, "failed to update tdls peer %pM for vdev %i: %i\n", sta->addr, arvif->vdev_id, ret); } else if (old_state == IEEE80211_STA_ASSOC && new_state == IEEE80211_STA_AUTH && (vif->type == NL80211_IFTYPE_AP || vif->type == NL80211_IFTYPE_MESH_POINT || vif->type == NL80211_IFTYPE_ADHOC)) { /* * Disassociation. */ ath10k_dbg(ar, ATH10K_DBG_STA, "mac sta %pM disassociated\n", sta->addr); ret = ath10k_station_disassoc(ar, vif, sta); if (ret) ath10k_warn(ar, "failed to disassociate station: %pM vdev %i: %i\n", sta->addr, arvif->vdev_id, ret); } exit: mutex_unlock(&ar->conf_mutex); return ret; } static int ath10k_conf_tx_uapsd(struct ath10k *ar, struct ieee80211_vif *vif, u16 ac, bool enable) { struct ath10k_vif *arvif = (void *)vif->drv_priv; struct wmi_sta_uapsd_auto_trig_arg arg = {}; u32 prio = 0, acc = 0; u32 value = 0; int ret = 0; lockdep_assert_held(&ar->conf_mutex); if (arvif->vdev_type != WMI_VDEV_TYPE_STA) return 0; switch (ac) { case IEEE80211_AC_VO: value = WMI_STA_PS_UAPSD_AC3_DELIVERY_EN | WMI_STA_PS_UAPSD_AC3_TRIGGER_EN; prio = 7; acc = 3; break; case IEEE80211_AC_VI: value = WMI_STA_PS_UAPSD_AC2_DELIVERY_EN | WMI_STA_PS_UAPSD_AC2_TRIGGER_EN; prio = 5; acc = 2; break; case IEEE80211_AC_BE: value = WMI_STA_PS_UAPSD_AC1_DELIVERY_EN | WMI_STA_PS_UAPSD_AC1_TRIGGER_EN; prio = 2; acc = 1; break; case IEEE80211_AC_BK: value = WMI_STA_PS_UAPSD_AC0_DELIVERY_EN | WMI_STA_PS_UAPSD_AC0_TRIGGER_EN; prio = 0; acc = 0; break; } if (enable) arvif->u.sta.uapsd |= value; else arvif->u.sta.uapsd &= ~value; ret = ath10k_wmi_set_sta_ps_param(ar, arvif->vdev_id, WMI_STA_PS_PARAM_UAPSD, arvif->u.sta.uapsd); if (ret) { ath10k_warn(ar, "failed to set uapsd params: %d\n", ret); goto exit; } if (arvif->u.sta.uapsd) value = WMI_STA_PS_RX_WAKE_POLICY_POLL_UAPSD; else value = WMI_STA_PS_RX_WAKE_POLICY_WAKE; ret = ath10k_wmi_set_sta_ps_param(ar, arvif->vdev_id, WMI_STA_PS_PARAM_RX_WAKE_POLICY, value); if (ret) ath10k_warn(ar, "failed to set rx wake param: %d\n", ret); ret = ath10k_mac_vif_recalc_ps_wake_threshold(arvif); if (ret) { ath10k_warn(ar, "failed to recalc ps wake threshold on vdev %i: %d\n", arvif->vdev_id, ret); return ret; } ret = ath10k_mac_vif_recalc_ps_poll_count(arvif); if (ret) { ath10k_warn(ar, "failed to recalc ps poll count on vdev %i: %d\n", arvif->vdev_id, ret); return ret; } if (test_bit(WMI_SERVICE_STA_UAPSD_BASIC_AUTO_TRIG, ar->wmi.svc_map) || test_bit(WMI_SERVICE_STA_UAPSD_VAR_AUTO_TRIG, ar->wmi.svc_map)) { /* Only userspace can make an educated decision when to send * trigger frame. The following effectively disables u-UAPSD * autotrigger in firmware (which is enabled by default * provided the autotrigger service is available). */ arg.wmm_ac = acc; arg.user_priority = prio; arg.service_interval = 0; arg.suspend_interval = WMI_STA_UAPSD_MAX_INTERVAL_MSEC; arg.delay_interval = WMI_STA_UAPSD_MAX_INTERVAL_MSEC; ret = ath10k_wmi_vdev_sta_uapsd(ar, arvif->vdev_id, arvif->bssid, &arg, 1); if (ret) { ath10k_warn(ar, "failed to set uapsd auto trigger %d\n", ret); return ret; } } exit: return ret; } static int ath10k_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, unsigned int link_id, u16 ac, const struct ieee80211_tx_queue_params *params) { struct ath10k *ar = hw->priv; struct ath10k_vif *arvif = (void *)vif->drv_priv; struct wmi_wmm_params_arg *p = NULL; int ret; mutex_lock(&ar->conf_mutex); switch (ac) { case IEEE80211_AC_VO: p = &arvif->wmm_params.ac_vo; break; case IEEE80211_AC_VI: p = &arvif->wmm_params.ac_vi; break; case IEEE80211_AC_BE: p = &arvif->wmm_params.ac_be; break; case IEEE80211_AC_BK: p = &arvif->wmm_params.ac_bk; break; } if (WARN_ON(!p)) { ret = -EINVAL; goto exit; } p->cwmin = params->cw_min; p->cwmax = params->cw_max; p->aifs = params->aifs; /* * The channel time duration programmed in the HW is in absolute * microseconds, while mac80211 gives the txop in units of * 32 microseconds. */ p->txop = params->txop * 32; if (ar->wmi.ops->gen_vdev_wmm_conf) { ret = ath10k_wmi_vdev_wmm_conf(ar, arvif->vdev_id, &arvif->wmm_params); if (ret) { ath10k_warn(ar, "failed to set vdev wmm params on vdev %i: %d\n", arvif->vdev_id, ret); goto exit; } } else { /* This won't work well with multi-interface cases but it's * better than nothing. */ ret = ath10k_wmi_pdev_set_wmm_params(ar, &arvif->wmm_params); if (ret) { ath10k_warn(ar, "failed to set wmm params: %d\n", ret); goto exit; } } ret = ath10k_conf_tx_uapsd(ar, vif, ac, params->uapsd); if (ret) ath10k_warn(ar, "failed to set sta uapsd: %d\n", ret); exit: mutex_unlock(&ar->conf_mutex); return ret; } static int ath10k_remain_on_channel(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_channel *chan, int duration, enum ieee80211_roc_type type) { struct ath10k *ar = hw->priv; struct ath10k_vif *arvif = (void *)vif->drv_priv; struct wmi_start_scan_arg *arg = NULL; int ret = 0; u32 scan_time_msec; mutex_lock(&ar->conf_mutex); if (ath10k_mac_tdls_vif_stations_count(hw, vif) > 0) { ret = -EBUSY; goto exit; } spin_lock_bh(&ar->data_lock); switch (ar->scan.state) { case ATH10K_SCAN_IDLE: reinit_completion(&ar->scan.started); reinit_completion(&ar->scan.completed); reinit_completion(&ar->scan.on_channel); ar->scan.state = ATH10K_SCAN_STARTING; ar->scan.is_roc = true; ar->scan.vdev_id = arvif->vdev_id; ar->scan.roc_freq = chan->center_freq; ar->scan.roc_notify = true; ret = 0; break; case ATH10K_SCAN_STARTING: case ATH10K_SCAN_RUNNING: case ATH10K_SCAN_ABORTING: ret = -EBUSY; break; } spin_unlock_bh(&ar->data_lock); if (ret) goto exit; scan_time_msec = ar->hw->wiphy->max_remain_on_channel_duration * 2; arg = kzalloc(sizeof(*arg), GFP_KERNEL); if (!arg) { ret = -ENOMEM; goto exit; } ath10k_wmi_start_scan_init(ar, arg); arg->vdev_id = arvif->vdev_id; arg->scan_id = ATH10K_SCAN_ID; arg->n_channels = 1; arg->channels[0] = chan->center_freq; arg->dwell_time_active = scan_time_msec; arg->dwell_time_passive = scan_time_msec; arg->max_scan_time = scan_time_msec; arg->scan_ctrl_flags |= WMI_SCAN_FLAG_PASSIVE; arg->scan_ctrl_flags |= WMI_SCAN_FILTER_PROBE_REQ; arg->burst_duration_ms = duration; ret = ath10k_start_scan(ar, arg); if (ret) { ath10k_warn(ar, "failed to start roc scan: %d\n", ret); spin_lock_bh(&ar->data_lock); ar->scan.state = ATH10K_SCAN_IDLE; spin_unlock_bh(&ar->data_lock); goto exit; } ret = wait_for_completion_timeout(&ar->scan.on_channel, 3 * HZ); if (ret == 0) { ath10k_warn(ar, "failed to switch to channel for roc scan\n"); ret = ath10k_scan_stop(ar); if (ret) ath10k_warn(ar, "failed to stop scan: %d\n", ret); ret = -ETIMEDOUT; goto exit; } ieee80211_queue_delayed_work(ar->hw, &ar->scan.timeout, msecs_to_jiffies(duration)); ret = 0; exit: kfree(arg); mutex_unlock(&ar->conf_mutex); return ret; } static int ath10k_cancel_remain_on_channel(struct ieee80211_hw *hw, struct ieee80211_vif *vif) { struct ath10k *ar = hw->priv; mutex_lock(&ar->conf_mutex); spin_lock_bh(&ar->data_lock); ar->scan.roc_notify = false; spin_unlock_bh(&ar->data_lock); ath10k_scan_abort(ar); mutex_unlock(&ar->conf_mutex); cancel_delayed_work_sync(&ar->scan.timeout); return 0; } /* * Both RTS and Fragmentation threshold are interface-specific * in ath10k, but device-specific in mac80211. */ static int ath10k_set_rts_threshold(struct ieee80211_hw *hw, int radio_idx, u32 value) { struct ath10k *ar = hw->priv; struct ath10k_vif *arvif; int ret = 0; mutex_lock(&ar->conf_mutex); list_for_each_entry(arvif, &ar->arvifs, list) { ath10k_dbg(ar, ATH10K_DBG_MAC, "mac vdev %d rts threshold %d\n", arvif->vdev_id, value); ret = ath10k_mac_set_rts(arvif, value); if (ret) { ath10k_warn(ar, "failed to set rts threshold for vdev %d: %d\n", arvif->vdev_id, ret); break; } } mutex_unlock(&ar->conf_mutex); return ret; } static int ath10k_mac_op_set_frag_threshold(struct ieee80211_hw *hw, int radio_idx, u32 value) { /* Even though there's a WMI enum for fragmentation threshold no known * firmware actually implements it. Moreover it is not possible to rely * frame fragmentation to mac80211 because firmware clears the "more * fragments" bit in frame control making it impossible for remote * devices to reassemble frames. * * Hence implement a dummy callback just to say fragmentation isn't * supported. This effectively prevents mac80211 from doing frame * fragmentation in software. */ return -EOPNOTSUPP; } void ath10k_mac_wait_tx_complete(struct ath10k *ar) { bool skip; long time_left; /* mac80211 doesn't care if we really xmit queued frames or not * we'll collect those frames either way if we stop/delete vdevs */ if (ar->state == ATH10K_STATE_WEDGED) return; time_left = wait_event_timeout(ar->htt.empty_tx_wq, ({ bool empty; spin_lock_bh(&ar->htt.tx_lock); empty = (ar->htt.num_pending_tx == 0); spin_unlock_bh(&ar->htt.tx_lock); skip = (ar->state == ATH10K_STATE_WEDGED) || test_bit(ATH10K_FLAG_CRASH_FLUSH, &ar->dev_flags); (empty || skip); }), ATH10K_FLUSH_TIMEOUT_HZ); if (time_left == 0 || skip) ath10k_warn(ar, "failed to flush transmit queue (skip %i ar-state %i): %ld\n", skip, ar->state, time_left); } static void ath10k_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u32 queues, bool drop) { struct ath10k *ar = hw->priv; struct ath10k_vif *arvif; u32 bitmap; if (drop) { if (vif && vif->type == NL80211_IFTYPE_STATION) { bitmap = ~(1 << WMI_MGMT_TID); list_for_each_entry(arvif, &ar->arvifs, list) { if (arvif->vdev_type == WMI_VDEV_TYPE_STA) ath10k_wmi_peer_flush(ar, arvif->vdev_id, arvif->bssid, bitmap); } ath10k_htt_flush_tx(&ar->htt); } return; } mutex_lock(&ar->conf_mutex); ath10k_mac_wait_tx_complete(ar); mutex_unlock(&ar->conf_mutex); } /* TODO: Implement this function properly * For now it is needed to reply to Probe Requests in IBSS mode. * Probably we need this information from FW. */ static int ath10k_tx_last_beacon(struct ieee80211_hw *hw) { return 1; } static void ath10k_reconfig_complete(struct ieee80211_hw *hw, enum ieee80211_reconfig_type reconfig_type) { struct ath10k *ar = hw->priv; struct ath10k_vif *arvif; if (reconfig_type != IEEE80211_RECONFIG_TYPE_RESTART) return; mutex_lock(&ar->conf_mutex); /* If device failed to restart it will be in a different state, e.g. * ATH10K_STATE_WEDGED */ if (ar->state == ATH10K_STATE_RESTARTED) { ath10k_info(ar, "device successfully recovered\n"); ar->state = ATH10K_STATE_ON; ieee80211_wake_queues(ar->hw); /* Clear recovery state. */ complete(&ar->driver_recovery); atomic_set(&ar->fail_cont_count, 0); atomic_set(&ar->pending_recovery, 0); if (ar->hw_params.hw_restart_disconnect) { list_for_each_entry(arvif, &ar->arvifs, list) { if (arvif->is_up && arvif->vdev_type == WMI_VDEV_TYPE_STA) ieee80211_hw_restart_disconnect(arvif->vif); } } } mutex_unlock(&ar->conf_mutex); } static void ath10k_mac_update_bss_chan_survey(struct ath10k *ar, struct ieee80211_channel *channel) { int ret; enum wmi_bss_survey_req_type type = WMI_BSS_SURVEY_REQ_TYPE_READ; lockdep_assert_held(&ar->conf_mutex); if (!test_bit(WMI_SERVICE_BSS_CHANNEL_INFO_64, ar->wmi.svc_map) || (ar->rx_channel != channel)) return; if (ar->scan.state != ATH10K_SCAN_IDLE) { ath10k_dbg(ar, ATH10K_DBG_MAC, "ignoring bss chan info request while scanning..\n"); return; } reinit_completion(&ar->bss_survey_done); ret = ath10k_wmi_pdev_bss_chan_info_request(ar, type); if (ret) { ath10k_warn(ar, "failed to send pdev bss chan info request\n"); return; } ret = wait_for_completion_timeout(&ar->bss_survey_done, 3 * HZ); if (!ret) { ath10k_warn(ar, "bss channel survey timed out\n"); return; } } static int ath10k_get_survey(struct ieee80211_hw *hw, int idx, struct survey_info *survey) { struct ath10k *ar = hw->priv; struct ieee80211_supported_band *sband; struct survey_info *ar_survey = &ar->survey[idx]; int ret = 0; mutex_lock(&ar->conf_mutex); sband = hw->wiphy->bands[NL80211_BAND_2GHZ]; if (sband && idx >= sband->n_channels) { idx -= sband->n_channels; sband = NULL; } if (!sband) sband = hw->wiphy->bands[NL80211_BAND_5GHZ]; if (!sband || idx >= sband->n_channels) { ret = -ENOENT; goto exit; } ath10k_mac_update_bss_chan_survey(ar, &sband->channels[idx]); spin_lock_bh(&ar->data_lock); memcpy(survey, ar_survey, sizeof(*survey)); spin_unlock_bh(&ar->data_lock); survey->channel = &sband->channels[idx]; if (ar->rx_channel == survey->channel) survey->filled |= SURVEY_INFO_IN_USE; exit: mutex_unlock(&ar->conf_mutex); return ret; } static bool ath10k_mac_bitrate_mask_get_single_nss(struct ath10k *ar, enum nl80211_band band, const struct cfg80211_bitrate_mask *mask, int *nss) { struct ieee80211_supported_band *sband = &ar->mac.sbands[band]; u16 vht_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map); u8 ht_nss_mask = 0; u8 vht_nss_mask = 0; int i; if (mask->control[band].legacy) return false; for (i = 0; i < ARRAY_SIZE(mask->control[band].ht_mcs); i++) { if (mask->control[band].ht_mcs[i] == 0) continue; else if (mask->control[band].ht_mcs[i] == sband->ht_cap.mcs.rx_mask[i]) ht_nss_mask |= BIT(i); else return false; } for (i = 0; i < ARRAY_SIZE(mask->control[band].vht_mcs); i++) { if (mask->control[band].vht_mcs[i] == 0) continue; else if (mask->control[band].vht_mcs[i] == ath10k_mac_get_max_vht_mcs_map(vht_mcs_map, i)) vht_nss_mask |= BIT(i); else return false; } if (ht_nss_mask != vht_nss_mask) return false; if (ht_nss_mask == 0) return false; if (BIT(fls(ht_nss_mask)) - 1 != ht_nss_mask) return false; *nss = fls(ht_nss_mask); return true; } static int ath10k_mac_set_fixed_rate_params(struct ath10k_vif *arvif, u8 rate, u8 nss, u8 sgi, u8 ldpc) { struct ath10k *ar = arvif->ar; u32 vdev_param; int ret; lockdep_assert_held(&ar->conf_mutex); ath10k_dbg(ar, ATH10K_DBG_MAC, "mac set fixed rate params vdev %i rate 0x%02x nss %u sgi %u\n", arvif->vdev_id, rate, nss, sgi); vdev_param = ar->wmi.vdev_param->fixed_rate; ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, vdev_param, rate); if (ret) { ath10k_warn(ar, "failed to set fixed rate param 0x%02x: %d\n", rate, ret); return ret; } vdev_param = ar->wmi.vdev_param->nss; ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, vdev_param, nss); if (ret) { ath10k_warn(ar, "failed to set nss param %d: %d\n", nss, ret); return ret; } vdev_param = ar->wmi.vdev_param->sgi; ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, vdev_param, sgi); if (ret) { ath10k_warn(ar, "failed to set sgi param %d: %d\n", sgi, ret); return ret; } vdev_param = ar->wmi.vdev_param->ldpc; ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, vdev_param, ldpc); if (ret) { ath10k_warn(ar, "failed to set ldpc param %d: %d\n", ldpc, ret); return ret; } return 0; } static bool ath10k_mac_can_set_bitrate_mask(struct ath10k *ar, enum nl80211_band band, const struct cfg80211_bitrate_mask *mask, bool allow_pfr) { int i; u16 vht_mcs; /* Due to firmware limitation in WMI_PEER_ASSOC_CMDID it is impossible * to express all VHT MCS rate masks. Effectively only the following * ranges can be used: none, 0-7, 0-8 and 0-9. */ for (i = 0; i < NL80211_VHT_NSS_MAX; i++) { vht_mcs = mask->control[band].vht_mcs[i]; switch (vht_mcs) { case 0: case BIT(8) - 1: case BIT(9) - 1: case BIT(10) - 1: break; default: if (!allow_pfr) ath10k_warn(ar, "refusing bitrate mask with missing 0-7 VHT MCS rates\n"); return false; } } return true; } static bool ath10k_mac_set_vht_bitrate_mask_fixup(struct ath10k *ar, struct ath10k_vif *arvif, struct ieee80211_sta *sta) { int err; u8 rate = arvif->vht_pfr; /* skip non vht and multiple rate peers */ if (!sta->deflink.vht_cap.vht_supported || arvif->vht_num_rates != 1) return false; err = ath10k_wmi_peer_set_param(ar, arvif->vdev_id, sta->addr, WMI_PEER_PARAM_FIXED_RATE, rate); if (err) ath10k_warn(ar, "failed to enable STA %pM peer fixed rate: %d\n", sta->addr, err); return true; } static void ath10k_mac_set_bitrate_mask_iter(void *data, struct ieee80211_sta *sta) { struct ath10k_vif *arvif = data; struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv; struct ath10k *ar = arvif->ar; if (arsta->arvif != arvif) return; if (ath10k_mac_set_vht_bitrate_mask_fixup(ar, arvif, sta)) return; spin_lock_bh(&ar->data_lock); arsta->changed |= IEEE80211_RC_SUPP_RATES_CHANGED; spin_unlock_bh(&ar->data_lock); ieee80211_queue_work(ar->hw, &arsta->update_wk); } static void ath10k_mac_clr_bitrate_mask_iter(void *data, struct ieee80211_sta *sta) { struct ath10k_vif *arvif = data; struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv; struct ath10k *ar = arvif->ar; int err; /* clear vht peers only */ if (arsta->arvif != arvif || !sta->deflink.vht_cap.vht_supported) return; err = ath10k_wmi_peer_set_param(ar, arvif->vdev_id, sta->addr, WMI_PEER_PARAM_FIXED_RATE, WMI_FIXED_RATE_NONE); if (err) ath10k_warn(ar, "failed to clear STA %pM peer fixed rate: %d\n", sta->addr, err); } static int ath10k_mac_op_set_bitrate_mask(struct ieee80211_hw *hw, struct ieee80211_vif *vif, const struct cfg80211_bitrate_mask *mask) { struct ath10k_vif *arvif = (void *)vif->drv_priv; struct cfg80211_chan_def def; struct ath10k *ar = arvif->ar; enum nl80211_band band; const u8 *ht_mcs_mask; const u16 *vht_mcs_mask; u8 rate; u8 nss; u8 sgi; u8 ldpc; int single_nss; int ret; int vht_num_rates, allow_pfr; u8 vht_pfr; bool update_bitrate_mask = true; if (ath10k_mac_vif_chan(vif, &def)) return -EPERM; band = def.chan->band; ht_mcs_mask = mask->control[band].ht_mcs; vht_mcs_mask = mask->control[band].vht_mcs; ldpc = !!(ar->ht_cap_info & WMI_HT_CAP_LDPC); sgi = mask->control[band].gi; if (sgi == NL80211_TXRATE_FORCE_LGI) return -EINVAL; allow_pfr = test_bit(ATH10K_FW_FEATURE_PEER_FIXED_RATE, ar->normal_mode_fw.fw_file.fw_features); if (allow_pfr) { mutex_lock(&ar->conf_mutex); ieee80211_iterate_stations_atomic(ar->hw, ath10k_mac_clr_bitrate_mask_iter, arvif); mutex_unlock(&ar->conf_mutex); } if (ath10k_mac_bitrate_mask_has_single_rate(ar, band, mask, &vht_num_rates)) { ret = ath10k_mac_bitrate_mask_get_single_rate(ar, band, mask, &rate, &nss, false); if (ret) { ath10k_warn(ar, "failed to get single rate for vdev %i: %d\n", arvif->vdev_id, ret); return ret; } } else if (ath10k_mac_bitrate_mask_get_single_nss(ar, band, mask, &single_nss)) { rate = WMI_FIXED_RATE_NONE; nss = single_nss; } else { rate = WMI_FIXED_RATE_NONE; nss = min(ar->num_rf_chains, max(ath10k_mac_max_ht_nss(ht_mcs_mask), ath10k_mac_max_vht_nss(vht_mcs_mask))); if (!ath10k_mac_can_set_bitrate_mask(ar, band, mask, allow_pfr)) { u8 vht_nss; if (!allow_pfr || vht_num_rates != 1) return -EINVAL; /* Reach here, firmware supports peer fixed rate and has * single vht rate, and don't update vif birate_mask, as * the rate only for specific peer. */ ath10k_mac_bitrate_mask_get_single_rate(ar, band, mask, &vht_pfr, &vht_nss, true); update_bitrate_mask = false; } else { vht_pfr = 0; } mutex_lock(&ar->conf_mutex); if (update_bitrate_mask) arvif->bitrate_mask = *mask; arvif->vht_num_rates = vht_num_rates; arvif->vht_pfr = vht_pfr; ieee80211_iterate_stations_atomic(ar->hw, ath10k_mac_set_bitrate_mask_iter, arvif); mutex_unlock(&ar->conf_mutex); } mutex_lock(&ar->conf_mutex); ret = ath10k_mac_set_fixed_rate_params(arvif, rate, nss, sgi, ldpc); if (ret) { ath10k_warn(ar, "failed to set fixed rate params on vdev %i: %d\n", arvif->vdev_id, ret); goto exit; } exit: mutex_unlock(&ar->conf_mutex); return ret; } static void ath10k_sta_rc_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_link_sta *link_sta, u32 changed) { struct ieee80211_sta *sta = link_sta->sta; struct ath10k *ar = hw->priv; struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv; struct ath10k_vif *arvif = (void *)vif->drv_priv; struct ath10k_peer *peer; u32 bw, smps; spin_lock_bh(&ar->data_lock); peer = ath10k_peer_find(ar, arvif->vdev_id, sta->addr); if (!peer) { spin_unlock_bh(&ar->data_lock); ath10k_warn(ar, "mac sta rc update failed to find peer %pM on vdev %i\n", sta->addr, arvif->vdev_id); return; } ath10k_dbg(ar, ATH10K_DBG_STA, "mac sta rc update for %pM changed %08x bw %d nss %d smps %d\n", sta->addr, changed, sta->deflink.bandwidth, sta->deflink.rx_nss, sta->deflink.smps_mode); if (changed & IEEE80211_RC_BW_CHANGED) { bw = WMI_PEER_CHWIDTH_20MHZ; switch (sta->deflink.bandwidth) { case IEEE80211_STA_RX_BW_20: bw = WMI_PEER_CHWIDTH_20MHZ; break; case IEEE80211_STA_RX_BW_40: bw = WMI_PEER_CHWIDTH_40MHZ; break; case IEEE80211_STA_RX_BW_80: bw = WMI_PEER_CHWIDTH_80MHZ; break; case IEEE80211_STA_RX_BW_160: bw = WMI_PEER_CHWIDTH_160MHZ; break; default: ath10k_warn(ar, "Invalid bandwidth %d in rc update for %pM\n", sta->deflink.bandwidth, sta->addr); bw = WMI_PEER_CHWIDTH_20MHZ; break; } arsta->bw = bw; } if (changed & IEEE80211_RC_NSS_CHANGED) arsta->nss = sta->deflink.rx_nss; if (changed & IEEE80211_RC_SMPS_CHANGED) { smps = WMI_PEER_SMPS_PS_NONE; switch (sta->deflink.smps_mode) { case IEEE80211_SMPS_AUTOMATIC: case IEEE80211_SMPS_OFF: smps = WMI_PEER_SMPS_PS_NONE; break; case IEEE80211_SMPS_STATIC: smps = WMI_PEER_SMPS_STATIC; break; case IEEE80211_SMPS_DYNAMIC: smps = WMI_PEER_SMPS_DYNAMIC; break; case IEEE80211_SMPS_NUM_MODES: ath10k_warn(ar, "Invalid smps %d in sta rc update for %pM\n", sta->deflink.smps_mode, sta->addr); smps = WMI_PEER_SMPS_PS_NONE; break; } arsta->smps = smps; } arsta->changed |= changed; spin_unlock_bh(&ar->data_lock); ieee80211_queue_work(hw, &arsta->update_wk); } static void ath10k_offset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif, s64 tsf_offset) { struct ath10k *ar = hw->priv; struct ath10k_vif *arvif = (void *)vif->drv_priv; u32 offset, vdev_param; int ret; if (tsf_offset < 0) { vdev_param = ar->wmi.vdev_param->dec_tsf; offset = -tsf_offset; } else { vdev_param = ar->wmi.vdev_param->inc_tsf; offset = tsf_offset; } ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, vdev_param, offset); if (ret && ret != -EOPNOTSUPP) ath10k_warn(ar, "failed to set tsf offset %d cmd %d: %d\n", offset, vdev_param, ret); } static int ath10k_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_ampdu_params *params) { struct ath10k *ar = hw->priv; struct ath10k_vif *arvif = (void *)vif->drv_priv; struct ieee80211_sta *sta = params->sta; enum ieee80211_ampdu_mlme_action action = params->action; u16 tid = params->tid; ath10k_dbg(ar, ATH10K_DBG_MAC, "mac ampdu vdev_id %i sta %pM tid %u action %d\n", arvif->vdev_id, sta->addr, tid, action); switch (action) { case IEEE80211_AMPDU_RX_START: case IEEE80211_AMPDU_RX_STOP: /* HTT AddBa/DelBa events trigger mac80211 Rx BA session * creation/removal. Do we need to verify this? */ return 0; case IEEE80211_AMPDU_TX_START: case IEEE80211_AMPDU_TX_STOP_CONT: case IEEE80211_AMPDU_TX_STOP_FLUSH: case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: case IEEE80211_AMPDU_TX_OPERATIONAL: /* Firmware offloads Tx aggregation entirely so deny mac80211 * Tx aggregation requests. */ return -EOPNOTSUPP; } return -EINVAL; } static void ath10k_mac_update_rx_channel(struct ath10k *ar, struct ieee80211_chanctx_conf *ctx, struct ieee80211_vif_chanctx_switch *vifs, int n_vifs) { struct cfg80211_chan_def *def = NULL; /* Both locks are required because ar->rx_channel is modified. This * allows readers to hold either lock. */ lockdep_assert_held(&ar->conf_mutex); lockdep_assert_held(&ar->data_lock); WARN_ON(ctx && vifs); WARN_ON(vifs && !n_vifs); /* FIXME: Sort of an optimization and a workaround. Peers and vifs are * on a linked list now. Doing a lookup peer -> vif -> chanctx for each * ppdu on Rx may reduce performance on low-end systems. It should be * possible to make tables/hashmaps to speed the lookup up (be vary of * cpu data cache lines though regarding sizes) but to keep the initial * implementation simple and less intrusive fallback to the slow lookup * only for multi-channel cases. Single-channel cases will remain to * use the old channel derival and thus performance should not be * affected much. */ rcu_read_lock(); if (!ctx && ath10k_mac_num_chanctxs(ar) == 1) { ieee80211_iter_chan_contexts_atomic(ar->hw, ath10k_mac_get_any_chandef_iter, &def); if (vifs) def = &vifs[0].new_ctx->def; ar->rx_channel = def->chan; } else if ((ctx && ath10k_mac_num_chanctxs(ar) == 0) || (ctx && (ar->state == ATH10K_STATE_RESTARTED))) { /* During driver restart due to firmware assert, since mac80211 * already has valid channel context for given radio, channel * context iteration return num_chanctx > 0. So fix rx_channel * when restart is in progress. */ ar->rx_channel = ctx->def.chan; } else { ar->rx_channel = NULL; } rcu_read_unlock(); } static void ath10k_mac_update_vif_chan(struct ath10k *ar, struct ieee80211_vif_chanctx_switch *vifs, int n_vifs) { struct ath10k_vif *arvif; int ret; int i; lockdep_assert_held(&ar->conf_mutex); /* First stop monitor interface. Some FW versions crash if there's a * lone monitor interface. */ if (ar->monitor_started) ath10k_monitor_stop(ar); for (i = 0; i < n_vifs; i++) { arvif = (void *)vifs[i].vif->drv_priv; ath10k_dbg(ar, ATH10K_DBG_MAC, "mac chanctx switch vdev_id %i freq %u->%u width %d->%d\n", arvif->vdev_id, vifs[i].old_ctx->def.chan->center_freq, vifs[i].new_ctx->def.chan->center_freq, vifs[i].old_ctx->def.width, vifs[i].new_ctx->def.width); if (WARN_ON(!arvif->is_started)) continue; if (WARN_ON(!arvif->is_up)) continue; ret = ath10k_wmi_vdev_down(ar, arvif->vdev_id); if (ret) { ath10k_warn(ar, "failed to down vdev %d: %d\n", arvif->vdev_id, ret); continue; } } /* All relevant vdevs are downed and associated channel resources * should be available for the channel switch now. */ spin_lock_bh(&ar->data_lock); ath10k_mac_update_rx_channel(ar, NULL, vifs, n_vifs); spin_unlock_bh(&ar->data_lock); for (i = 0; i < n_vifs; i++) { arvif = (void *)vifs[i].vif->drv_priv; if (WARN_ON(!arvif->is_started)) continue; if (WARN_ON(!arvif->is_up)) continue; ret = ath10k_mac_setup_bcn_tmpl(arvif); if (ret) ath10k_warn(ar, "failed to update bcn tmpl during csa: %d\n", ret); ret = ath10k_mac_setup_prb_tmpl(arvif); if (ret) ath10k_warn(ar, "failed to update prb tmpl during csa: %d\n", ret); ret = ath10k_vdev_restart(arvif, &vifs[i].new_ctx->def); if (ret) { ath10k_warn(ar, "failed to restart vdev %d: %d\n", arvif->vdev_id, ret); continue; } ret = ath10k_wmi_vdev_up(arvif->ar, arvif->vdev_id, arvif->aid, arvif->bssid); if (ret) { ath10k_warn(ar, "failed to bring vdev up %d: %d\n", arvif->vdev_id, ret); continue; } } ath10k_monitor_recalc(ar); } static int ath10k_mac_op_add_chanctx(struct ieee80211_hw *hw, struct ieee80211_chanctx_conf *ctx) { struct ath10k *ar = hw->priv; ath10k_dbg(ar, ATH10K_DBG_MAC, "mac chanctx add freq %u width %d ptr %p\n", ctx->def.chan->center_freq, ctx->def.width, ctx); mutex_lock(&ar->conf_mutex); spin_lock_bh(&ar->data_lock); ath10k_mac_update_rx_channel(ar, ctx, NULL, 0); spin_unlock_bh(&ar->data_lock); ath10k_recalc_radar_detection(ar); ath10k_monitor_recalc(ar); mutex_unlock(&ar->conf_mutex); return 0; } static void ath10k_mac_op_remove_chanctx(struct ieee80211_hw *hw, struct ieee80211_chanctx_conf *ctx) { struct ath10k *ar = hw->priv; ath10k_dbg(ar, ATH10K_DBG_MAC, "mac chanctx remove freq %u width %d ptr %p\n", ctx->def.chan->center_freq, ctx->def.width, ctx); mutex_lock(&ar->conf_mutex); spin_lock_bh(&ar->data_lock); ath10k_mac_update_rx_channel(ar, NULL, NULL, 0); spin_unlock_bh(&ar->data_lock); ath10k_recalc_radar_detection(ar); ath10k_monitor_recalc(ar); mutex_unlock(&ar->conf_mutex); } struct ath10k_mac_change_chanctx_arg { struct ieee80211_chanctx_conf *ctx; struct ieee80211_vif_chanctx_switch *vifs; int n_vifs; int next_vif; }; static void ath10k_mac_change_chanctx_cnt_iter(void *data, u8 *mac, struct ieee80211_vif *vif) { struct ath10k_mac_change_chanctx_arg *arg = data; if (rcu_access_pointer(vif->bss_conf.chanctx_conf) != arg->ctx) return; arg->n_vifs++; } static void ath10k_mac_change_chanctx_fill_iter(void *data, u8 *mac, struct ieee80211_vif *vif) { struct ath10k_mac_change_chanctx_arg *arg = data; struct ieee80211_chanctx_conf *ctx; ctx = rcu_access_pointer(vif->bss_conf.chanctx_conf); if (ctx != arg->ctx) return; if (WARN_ON(arg->next_vif == arg->n_vifs)) return; arg->vifs[arg->next_vif].vif = vif; arg->vifs[arg->next_vif].old_ctx = ctx; arg->vifs[arg->next_vif].new_ctx = ctx; arg->next_vif++; } static void ath10k_mac_op_change_chanctx(struct ieee80211_hw *hw, struct ieee80211_chanctx_conf *ctx, u32 changed) { struct ath10k *ar = hw->priv; struct ath10k_mac_change_chanctx_arg arg = { .ctx = ctx }; mutex_lock(&ar->conf_mutex); ath10k_dbg(ar, ATH10K_DBG_MAC, "mac chanctx change freq %u width %d ptr %p changed %x\n", ctx->def.chan->center_freq, ctx->def.width, ctx, changed); /* This shouldn't really happen because channel switching should use * switch_vif_chanctx(). */ if (WARN_ON(changed & IEEE80211_CHANCTX_CHANGE_CHANNEL)) goto unlock; if (changed & IEEE80211_CHANCTX_CHANGE_WIDTH) { ieee80211_iterate_active_interfaces_atomic( hw, ATH10K_ITER_NORMAL_FLAGS, ath10k_mac_change_chanctx_cnt_iter, &arg); if (arg.n_vifs == 0) goto radar; arg.vifs = kcalloc(arg.n_vifs, sizeof(arg.vifs[0]), GFP_KERNEL); if (!arg.vifs) goto radar; ieee80211_iterate_active_interfaces_atomic( hw, ATH10K_ITER_NORMAL_FLAGS, ath10k_mac_change_chanctx_fill_iter, &arg); ath10k_mac_update_vif_chan(ar, arg.vifs, arg.n_vifs); kfree(arg.vifs); } radar: ath10k_recalc_radar_detection(ar); /* FIXME: How to configure Rx chains properly? */ /* No other actions are actually necessary. Firmware maintains channel * definitions per vdev internally and there's no host-side channel * context abstraction to configure, e.g. channel width. */ unlock: mutex_unlock(&ar->conf_mutex); } static int ath10k_mac_op_assign_vif_chanctx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_bss_conf *link_conf, struct ieee80211_chanctx_conf *ctx) { struct ath10k *ar = hw->priv; struct ath10k_vif *arvif = (void *)vif->drv_priv; int ret; mutex_lock(&ar->conf_mutex); ath10k_dbg(ar, ATH10K_DBG_MAC, "mac chanctx assign ptr %p vdev_id %i\n", ctx, arvif->vdev_id); if (WARN_ON(arvif->is_started)) { mutex_unlock(&ar->conf_mutex); return -EBUSY; } ret = ath10k_vdev_start(arvif, &ctx->def); if (ret) { ath10k_warn(ar, "failed to start vdev %i addr %pM on freq %d: %d\n", arvif->vdev_id, vif->addr, ctx->def.chan->center_freq, ret); goto err; } arvif->is_started = true; ret = ath10k_mac_vif_setup_ps(arvif); if (ret) { ath10k_warn(ar, "failed to update vdev %i ps: %d\n", arvif->vdev_id, ret); goto err_stop; } if (vif->type == NL80211_IFTYPE_MONITOR) { ret = ath10k_wmi_vdev_up(ar, arvif->vdev_id, 0, vif->addr); if (ret) { ath10k_warn(ar, "failed to up monitor vdev %i: %d\n", arvif->vdev_id, ret); goto err_stop; } arvif->is_up = true; } if (ath10k_mac_can_set_cts_prot(arvif)) { ret = ath10k_mac_set_cts_prot(arvif); if (ret) ath10k_warn(ar, "failed to set cts protection for vdev %d: %d\n", arvif->vdev_id, ret); } if (ath10k_peer_stats_enabled(ar) && ar->hw_params.tx_stats_over_pktlog) { ar->pktlog_filter |= ATH10K_PKTLOG_PEER_STATS; ret = ath10k_wmi_pdev_pktlog_enable(ar, ar->pktlog_filter); if (ret) { ath10k_warn(ar, "failed to enable pktlog %d\n", ret); goto err_stop; } } mutex_unlock(&ar->conf_mutex); return 0; err_stop: ath10k_vdev_stop(arvif); arvif->is_started = false; ath10k_mac_vif_setup_ps(arvif); err: mutex_unlock(&ar->conf_mutex); return ret; } static void ath10k_mac_op_unassign_vif_chanctx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_bss_conf *link_conf, struct ieee80211_chanctx_conf *ctx) { struct ath10k *ar = hw->priv; struct ath10k_vif *arvif = (void *)vif->drv_priv; int ret; mutex_lock(&ar->conf_mutex); ath10k_dbg(ar, ATH10K_DBG_MAC, "mac chanctx unassign ptr %p vdev_id %i\n", ctx, arvif->vdev_id); WARN_ON(!arvif->is_started); if (vif->type == NL80211_IFTYPE_MONITOR) { WARN_ON(!arvif->is_up); ret = ath10k_wmi_vdev_down(ar, arvif->vdev_id); if (ret) ath10k_warn(ar, "failed to down monitor vdev %i: %d\n", arvif->vdev_id, ret); arvif->is_up = false; } ret = ath10k_vdev_stop(arvif); if (ret) ath10k_warn(ar, "failed to stop vdev %i: %d\n", arvif->vdev_id, ret); arvif->is_started = false; mutex_unlock(&ar->conf_mutex); } static int ath10k_mac_op_switch_vif_chanctx(struct ieee80211_hw *hw, struct ieee80211_vif_chanctx_switch *vifs, int n_vifs, enum ieee80211_chanctx_switch_mode mode) { struct ath10k *ar = hw->priv; mutex_lock(&ar->conf_mutex); ath10k_dbg(ar, ATH10K_DBG_MAC, "mac chanctx switch n_vifs %d mode %d\n", n_vifs, mode); ath10k_mac_update_vif_chan(ar, vifs, n_vifs); mutex_unlock(&ar->conf_mutex); return 0; } static void ath10k_mac_op_sta_pre_rcu_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_sta *sta) { struct ath10k *ar; struct ath10k_peer *peer; ar = hw->priv; list_for_each_entry(peer, &ar->peers, list) if (peer->sta == sta) peer->removed = true; } /* HT MCS parameters with Nss = 1 */ static const struct ath10k_index_ht_data_rate_type supported_ht_mcs_rate_nss1[] = { /* MCS L20 L40 S20 S40 */ {0, { 65, 135, 72, 150} }, {1, { 130, 270, 144, 300} }, {2, { 195, 405, 217, 450} }, {3, { 260, 540, 289, 600} }, {4, { 390, 810, 433, 900} }, {5, { 520, 1080, 578, 1200} }, {6, { 585, 1215, 650, 1350} }, {7, { 650, 1350, 722, 1500} } }; /* HT MCS parameters with Nss = 2 */ static const struct ath10k_index_ht_data_rate_type supported_ht_mcs_rate_nss2[] = { /* MCS L20 L40 S20 S40 */ {0, {130, 270, 144, 300} }, {1, {260, 540, 289, 600} }, {2, {390, 810, 433, 900} }, {3, {520, 1080, 578, 1200} }, {4, {780, 1620, 867, 1800} }, {5, {1040, 2160, 1156, 2400} }, {6, {1170, 2430, 1300, 2700} }, {7, {1300, 2700, 1444, 3000} } }; /* MCS parameters with Nss = 1 */ static const struct ath10k_index_vht_data_rate_type supported_vht_mcs_rate_nss1[] = { /* MCS L80 S80 L40 S40 L20 S20 */ {0, {293, 325}, {135, 150}, {65, 72} }, {1, {585, 650}, {270, 300}, {130, 144} }, {2, {878, 975}, {405, 450}, {195, 217} }, {3, {1170, 1300}, {540, 600}, {260, 289} }, {4, {1755, 1950}, {810, 900}, {390, 433} }, {5, {2340, 2600}, {1080, 1200}, {520, 578} }, {6, {2633, 2925}, {1215, 1350}, {585, 650} }, {7, {2925, 3250}, {1350, 1500}, {650, 722} }, {8, {3510, 3900}, {1620, 1800}, {780, 867} }, {9, {3900, 4333}, {1800, 2000}, {865, 960} } }; /*MCS parameters with Nss = 2 */ static const struct ath10k_index_vht_data_rate_type supported_vht_mcs_rate_nss2[] = { /* MCS L80 S80 L40 S40 L20 S20 */ {0, {585, 650}, {270, 300}, {130, 144} }, {1, {1170, 1300}, {540, 600}, {260, 289} }, {2, {1755, 1950}, {810, 900}, {390, 433} }, {3, {2340, 2600}, {1080, 1200}, {520, 578} }, {4, {3510, 3900}, {1620, 1800}, {780, 867} }, {5, {4680, 5200}, {2160, 2400}, {1040, 1156} }, {6, {5265, 5850}, {2430, 2700}, {1170, 1300} }, {7, {5850, 6500}, {2700, 3000}, {1300, 1444} }, {8, {7020, 7800}, {3240, 3600}, {1560, 1733} }, {9, {7800, 8667}, {3600, 4000}, {1730, 1920} } }; static void ath10k_mac_get_rate_flags_ht(struct ath10k *ar, u32 rate, u8 nss, u8 mcs, u8 *flags, u8 *bw) { struct ath10k_index_ht_data_rate_type *mcs_rate; u8 index; size_t len_nss1 = ARRAY_SIZE(supported_ht_mcs_rate_nss1); size_t len_nss2 = ARRAY_SIZE(supported_ht_mcs_rate_nss2); if (mcs >= (len_nss1 + len_nss2)) { ath10k_warn(ar, "not supported mcs %d in current rate table", mcs); return; } mcs_rate = (struct ath10k_index_ht_data_rate_type *) ((nss == 1) ? &supported_ht_mcs_rate_nss1 : &supported_ht_mcs_rate_nss2); if (mcs >= len_nss1) index = mcs - len_nss1; else index = mcs; if (rate == mcs_rate[index].supported_rate[0]) { *bw = RATE_INFO_BW_20; } else if (rate == mcs_rate[index].supported_rate[1]) { *bw |= RATE_INFO_BW_40; } else if (rate == mcs_rate[index].supported_rate[2]) { *bw |= RATE_INFO_BW_20; *flags |= RATE_INFO_FLAGS_SHORT_GI; } else if (rate == mcs_rate[index].supported_rate[3]) { *bw |= RATE_INFO_BW_40; *flags |= RATE_INFO_FLAGS_SHORT_GI; } else { ath10k_warn(ar, "invalid ht params rate %d 100kbps nss %d mcs %d", rate, nss, mcs); } } static void ath10k_mac_get_rate_flags_vht(struct ath10k *ar, u32 rate, u8 nss, u8 mcs, u8 *flags, u8 *bw) { struct ath10k_index_vht_data_rate_type *mcs_rate; mcs_rate = (struct ath10k_index_vht_data_rate_type *) ((nss == 1) ? &supported_vht_mcs_rate_nss1 : &supported_vht_mcs_rate_nss2); if (rate == mcs_rate[mcs].supported_VHT80_rate[0]) { *bw = RATE_INFO_BW_80; } else if (rate == mcs_rate[mcs].supported_VHT80_rate[1]) { *bw = RATE_INFO_BW_80; *flags |= RATE_INFO_FLAGS_SHORT_GI; } else if (rate == mcs_rate[mcs].supported_VHT40_rate[0]) { *bw = RATE_INFO_BW_40; } else if (rate == mcs_rate[mcs].supported_VHT40_rate[1]) { *bw = RATE_INFO_BW_40; *flags |= RATE_INFO_FLAGS_SHORT_GI; } else if (rate == mcs_rate[mcs].supported_VHT20_rate[0]) { *bw = RATE_INFO_BW_20; } else if (rate == mcs_rate[mcs].supported_VHT20_rate[1]) { *bw = RATE_INFO_BW_20; *flags |= RATE_INFO_FLAGS_SHORT_GI; } else { ath10k_warn(ar, "invalid vht params rate %d 100kbps nss %d mcs %d", rate, nss, mcs); } } static void ath10k_mac_get_rate_flags(struct ath10k *ar, u32 rate, enum ath10k_phy_mode mode, u8 nss, u8 mcs, u8 *flags, u8 *bw) { if (mode == ATH10K_PHY_MODE_HT) { *flags = RATE_INFO_FLAGS_MCS; ath10k_mac_get_rate_flags_ht(ar, rate, nss, mcs, flags, bw); } else if (mode == ATH10K_PHY_MODE_VHT) { *flags = RATE_INFO_FLAGS_VHT_MCS; ath10k_mac_get_rate_flags_vht(ar, rate, nss, mcs, flags, bw); } } static void ath10k_mac_parse_bitrate(struct ath10k *ar, u32 rate_code, u32 bitrate_kbps, struct rate_info *rate) { enum ath10k_phy_mode mode = ATH10K_PHY_MODE_LEGACY; enum wmi_rate_preamble preamble = WMI_TLV_GET_HW_RC_PREAM_V1(rate_code); u8 nss = WMI_TLV_GET_HW_RC_NSS_V1(rate_code) + 1; u8 mcs = WMI_TLV_GET_HW_RC_RATE_V1(rate_code); u8 flags = 0, bw = 0; ath10k_dbg(ar, ATH10K_DBG_MAC, "mac parse rate code 0x%x bitrate %d kbps\n", rate_code, bitrate_kbps); if (preamble == WMI_RATE_PREAMBLE_HT) mode = ATH10K_PHY_MODE_HT; else if (preamble == WMI_RATE_PREAMBLE_VHT) mode = ATH10K_PHY_MODE_VHT; ath10k_mac_get_rate_flags(ar, bitrate_kbps / 100, mode, nss, mcs, &flags, &bw); ath10k_dbg(ar, ATH10K_DBG_MAC, "mac parse bitrate preamble %d mode %d nss %d mcs %d flags %x bw %d\n", preamble, mode, nss, mcs, flags, bw); rate->flags = flags; rate->bw = bw; rate->legacy = bitrate_kbps / 100; rate->nss = nss; rate->mcs = mcs; } static void ath10k_mac_sta_get_peer_stats_info(struct ath10k *ar, struct ieee80211_sta *sta, struct station_info *sinfo) { struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv; struct ath10k_peer *peer; unsigned long time_left; int ret; if (!(ar->hw_params.supports_peer_stats_info && arsta->arvif->vdev_type == WMI_VDEV_TYPE_STA)) return; spin_lock_bh(&ar->data_lock); peer = ath10k_peer_find(ar, arsta->arvif->vdev_id, sta->addr); spin_unlock_bh(&ar->data_lock); if (!peer) return; reinit_completion(&ar->peer_stats_info_complete); ret = ath10k_wmi_request_peer_stats_info(ar, arsta->arvif->vdev_id, WMI_REQUEST_ONE_PEER_STATS_INFO, arsta->arvif->bssid, 0); if (ret && ret != -EOPNOTSUPP) { ath10k_warn(ar, "could not request peer stats info: %d\n", ret); return; } time_left = wait_for_completion_timeout(&ar->peer_stats_info_complete, 3 * HZ); if (time_left == 0) { ath10k_warn(ar, "timed out waiting peer stats info\n"); return; } if (arsta->rx_rate_code != 0 && arsta->rx_bitrate_kbps != 0) { ath10k_mac_parse_bitrate(ar, arsta->rx_rate_code, arsta->rx_bitrate_kbps, &sinfo->rxrate); sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_BITRATE); arsta->rx_rate_code = 0; arsta->rx_bitrate_kbps = 0; } if (arsta->tx_rate_code != 0 && arsta->tx_bitrate_kbps != 0) { ath10k_mac_parse_bitrate(ar, arsta->tx_rate_code, arsta->tx_bitrate_kbps, &sinfo->txrate); sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BITRATE); arsta->tx_rate_code = 0; arsta->tx_bitrate_kbps = 0; } } static void ath10k_sta_statistics(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_sta *sta, struct station_info *sinfo) { struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv; struct ath10k *ar = arsta->arvif->ar; if (!ath10k_peer_stats_enabled(ar)) return; mutex_lock(&ar->conf_mutex); ath10k_debug_fw_stats_request(ar); mutex_unlock(&ar->conf_mutex); sinfo->rx_duration = arsta->rx_duration; sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_DURATION); if (arsta->txrate.legacy || arsta->txrate.nss) { if (arsta->txrate.legacy) { sinfo->txrate.legacy = arsta->txrate.legacy; } else { sinfo->txrate.mcs = arsta->txrate.mcs; sinfo->txrate.nss = arsta->txrate.nss; sinfo->txrate.bw = arsta->txrate.bw; } sinfo->txrate.flags = arsta->txrate.flags; sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BITRATE); } if (ar->htt.disable_tx_comp) { sinfo->tx_failed = arsta->tx_failed; sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_FAILED); } sinfo->tx_retries = arsta->tx_retries; sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_RETRIES); ath10k_mac_sta_get_peer_stats_info(ar, sta, sinfo); } static int ath10k_mac_op_set_tid_config(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_sta *sta, struct cfg80211_tid_config *tid_config) { struct ath10k *ar = hw->priv; struct ath10k_vif *arvif = (void *)vif->drv_priv; struct ath10k_mac_iter_tid_conf_data data = {}; struct wmi_per_peer_per_tid_cfg_arg arg = {}; int ret, i; mutex_lock(&ar->conf_mutex); arg.vdev_id = arvif->vdev_id; arvif->tids_rst = 0; memset(arvif->tid_conf_changed, 0, sizeof(arvif->tid_conf_changed)); for (i = 0; i < tid_config->n_tid_conf; i++) { ret = ath10k_mac_parse_tid_config(ar, sta, vif, &tid_config->tid_conf[i], &arg); if (ret) goto exit; } ret = 0; if (sta) goto exit; arvif->tids_rst = 0; data.curr_vif = vif; data.ar = ar; ieee80211_iterate_stations_atomic(hw, ath10k_mac_vif_stations_tid_conf, &data); exit: mutex_unlock(&ar->conf_mutex); return ret; } static int ath10k_mac_op_reset_tid_config(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_sta *sta, u8 tids) { struct ath10k_vif *arvif = (void *)vif->drv_priv; struct ath10k_mac_iter_tid_conf_data data = {}; struct ath10k *ar = hw->priv; int ret = 0; mutex_lock(&ar->conf_mutex); if (sta) { arvif->tids_rst = 0; ret = ath10k_mac_reset_tid_config(ar, sta, arvif, tids); goto exit; } arvif->tids_rst = tids; data.curr_vif = vif; data.ar = ar; ieee80211_iterate_stations_atomic(hw, ath10k_mac_vif_stations_tid_conf, &data); exit: mutex_unlock(&ar->conf_mutex); return ret; } static const struct ieee80211_ops ath10k_ops = { .tx = ath10k_mac_op_tx, .wake_tx_queue = ath10k_mac_op_wake_tx_queue, .start = ath10k_start, .stop = ath10k_stop, .config = ath10k_config, .add_interface = ath10k_add_interface, .update_vif_offload = ath10k_update_vif_offload, .remove_interface = ath10k_remove_interface, .configure_filter = ath10k_configure_filter, .bss_info_changed = ath10k_bss_info_changed, .set_coverage_class = ath10k_mac_op_set_coverage_class, .hw_scan = ath10k_hw_scan, .cancel_hw_scan = ath10k_cancel_hw_scan, .set_key = ath10k_set_key, .set_default_unicast_key = ath10k_set_default_unicast_key, .sta_state = ath10k_sta_state, .sta_set_txpwr = ath10k_sta_set_txpwr, .conf_tx = ath10k_conf_tx, .remain_on_channel = ath10k_remain_on_channel, .cancel_remain_on_channel = ath10k_cancel_remain_on_channel, .set_rts_threshold = ath10k_set_rts_threshold, .set_frag_threshold = ath10k_mac_op_set_frag_threshold, .flush = ath10k_flush, .tx_last_beacon = ath10k_tx_last_beacon, .set_antenna = ath10k_set_antenna, .get_antenna = ath10k_get_antenna, .reconfig_complete = ath10k_reconfig_complete, .get_survey = ath10k_get_survey, .set_bitrate_mask = ath10k_mac_op_set_bitrate_mask, .link_sta_rc_update = ath10k_sta_rc_update, .offset_tsf = ath10k_offset_tsf, .ampdu_action = ath10k_ampdu_action, .get_et_sset_count = ath10k_debug_get_et_sset_count, .get_et_stats = ath10k_debug_get_et_stats, .get_et_strings = ath10k_debug_get_et_strings, .add_chanctx = ath10k_mac_op_add_chanctx, .remove_chanctx = ath10k_mac_op_remove_chanctx, .change_chanctx = ath10k_mac_op_change_chanctx, .assign_vif_chanctx = ath10k_mac_op_assign_vif_chanctx, .unassign_vif_chanctx = ath10k_mac_op_unassign_vif_chanctx, .switch_vif_chanctx = ath10k_mac_op_switch_vif_chanctx, .sta_pre_rcu_remove = ath10k_mac_op_sta_pre_rcu_remove, .sta_statistics = ath10k_sta_statistics, .set_tid_config = ath10k_mac_op_set_tid_config, .reset_tid_config = ath10k_mac_op_reset_tid_config, CFG80211_TESTMODE_CMD(ath10k_tm_cmd) #ifdef CONFIG_PM .suspend = ath10k_wow_op_suspend, .resume = ath10k_wow_op_resume, .set_wakeup = ath10k_wow_op_set_wakeup, #endif #ifdef CONFIG_MAC80211_DEBUGFS .sta_add_debugfs = ath10k_sta_add_debugfs, #endif .set_sar_specs = ath10k_mac_set_sar_specs, }; #define CHAN2G(_channel, _freq, _flags) { \ .band = NL80211_BAND_2GHZ, \ .hw_value = (_channel), \ .center_freq = (_freq), \ .flags = (_flags), \ .max_antenna_gain = 0, \ .max_power = 30, \ } #define CHAN5G(_channel, _freq, _flags) { \ .band = NL80211_BAND_5GHZ, \ .hw_value = (_channel), \ .center_freq = (_freq), \ .flags = (_flags), \ .max_antenna_gain = 0, \ .max_power = 30, \ } static const struct ieee80211_channel ath10k_2ghz_channels[] = { CHAN2G(1, 2412, 0), CHAN2G(2, 2417, 0), CHAN2G(3, 2422, 0), CHAN2G(4, 2427, 0), CHAN2G(5, 2432, 0), CHAN2G(6, 2437, 0), CHAN2G(7, 2442, 0), CHAN2G(8, 2447, 0), CHAN2G(9, 2452, 0), CHAN2G(10, 2457, 0), CHAN2G(11, 2462, 0), CHAN2G(12, 2467, 0), CHAN2G(13, 2472, 0), CHAN2G(14, 2484, 0), }; static const struct ieee80211_channel ath10k_5ghz_channels[] = { CHAN5G(36, 5180, 0), CHAN5G(40, 5200, 0), CHAN5G(44, 5220, 0), CHAN5G(48, 5240, 0), CHAN5G(52, 5260, 0), CHAN5G(56, 5280, 0), CHAN5G(60, 5300, 0), CHAN5G(64, 5320, 0), CHAN5G(100, 5500, 0), CHAN5G(104, 5520, 0), CHAN5G(108, 5540, 0), CHAN5G(112, 5560, 0), CHAN5G(116, 5580, 0), CHAN5G(120, 5600, 0), CHAN5G(124, 5620, 0), CHAN5G(128, 5640, 0), CHAN5G(132, 5660, 0), CHAN5G(136, 5680, 0), CHAN5G(140, 5700, 0), CHAN5G(144, 5720, 0), CHAN5G(149, 5745, 0), CHAN5G(153, 5765, 0), CHAN5G(157, 5785, 0), CHAN5G(161, 5805, 0), CHAN5G(165, 5825, 0), CHAN5G(169, 5845, 0), CHAN5G(173, 5865, 0), /* If you add more, you may need to change ATH10K_MAX_5G_CHAN */ /* And you will definitely need to change ATH10K_NUM_CHANS in core.h */ }; struct ath10k *ath10k_mac_create(size_t priv_size) { struct ieee80211_hw *hw; struct ieee80211_ops *ops; struct ath10k *ar; ops = kmemdup(&ath10k_ops, sizeof(ath10k_ops), GFP_KERNEL); if (!ops) return NULL; hw = ieee80211_alloc_hw(sizeof(struct ath10k) + priv_size, ops); if (!hw) { kfree(ops); return NULL; } ar = hw->priv; ar->hw = hw; ar->ops = ops; return ar; } void ath10k_mac_destroy(struct ath10k *ar) { struct ieee80211_ops *ops = ar->ops; ieee80211_free_hw(ar->hw); kfree(ops); } static const struct ieee80211_iface_limit ath10k_if_limits[] = { { .max = 8, .types = BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_P2P_CLIENT) }, { .max = 3, .types = BIT(NL80211_IFTYPE_P2P_GO) }, { .max = 1, .types = BIT(NL80211_IFTYPE_P2P_DEVICE) }, { .max = 7, .types = BIT(NL80211_IFTYPE_AP) #ifdef CONFIG_MAC80211_MESH | BIT(NL80211_IFTYPE_MESH_POINT) #endif }, }; static const struct ieee80211_iface_limit ath10k_10x_if_limits[] = { { .max = 8, .types = BIT(NL80211_IFTYPE_AP) #ifdef CONFIG_MAC80211_MESH | BIT(NL80211_IFTYPE_MESH_POINT) #endif }, { .max = 1, .types = BIT(NL80211_IFTYPE_STATION) }, }; static const struct ieee80211_iface_combination ath10k_if_comb[] = { { .limits = ath10k_if_limits, .n_limits = ARRAY_SIZE(ath10k_if_limits), .max_interfaces = 8, .num_different_channels = 1, .beacon_int_infra_match = true, }, }; static const struct ieee80211_iface_combination ath10k_10x_if_comb[] = { { .limits = ath10k_10x_if_limits, .n_limits = ARRAY_SIZE(ath10k_10x_if_limits), .max_interfaces = 8, .num_different_channels = 1, .beacon_int_infra_match = true, .beacon_int_min_gcd = 1, #ifdef CONFIG_ATH10K_DFS_CERTIFIED .radar_detect_widths = BIT(NL80211_CHAN_WIDTH_20_NOHT) | BIT(NL80211_CHAN_WIDTH_20) | BIT(NL80211_CHAN_WIDTH_40) | BIT(NL80211_CHAN_WIDTH_80), #endif }, }; static const struct ieee80211_iface_limit ath10k_tlv_if_limit[] = { { .max = 2, .types = BIT(NL80211_IFTYPE_STATION), }, { .max = 2, .types = BIT(NL80211_IFTYPE_AP) | #ifdef CONFIG_MAC80211_MESH BIT(NL80211_IFTYPE_MESH_POINT) | #endif BIT(NL80211_IFTYPE_P2P_CLIENT) | BIT(NL80211_IFTYPE_P2P_GO), }, { .max = 1, .types = BIT(NL80211_IFTYPE_P2P_DEVICE), }, }; static const struct ieee80211_iface_limit ath10k_tlv_qcs_if_limit[] = { { .max = 2, .types = BIT(NL80211_IFTYPE_STATION), }, { .max = 2, .types = BIT(NL80211_IFTYPE_P2P_CLIENT), }, { .max = 1, .types = BIT(NL80211_IFTYPE_AP) | #ifdef CONFIG_MAC80211_MESH BIT(NL80211_IFTYPE_MESH_POINT) | #endif BIT(NL80211_IFTYPE_P2P_GO), }, { .max = 1, .types = BIT(NL80211_IFTYPE_P2P_DEVICE), }, }; static const struct ieee80211_iface_limit ath10k_tlv_if_limit_ibss[] = { { .max = 1, .types = BIT(NL80211_IFTYPE_STATION), }, { .max = 1, .types = BIT(NL80211_IFTYPE_ADHOC), }, }; /* FIXME: This is not thoroughly tested. These combinations may over- or * underestimate hw/fw capabilities. */ static struct ieee80211_iface_combination ath10k_tlv_if_comb[] = { { .limits = ath10k_tlv_if_limit, .num_different_channels = 1, .max_interfaces = 4, .n_limits = ARRAY_SIZE(ath10k_tlv_if_limit), }, { .limits = ath10k_tlv_if_limit_ibss, .num_different_channels = 1, .max_interfaces = 2, .n_limits = ARRAY_SIZE(ath10k_tlv_if_limit_ibss), }, }; static struct ieee80211_iface_combination ath10k_tlv_qcs_if_comb[] = { { .limits = ath10k_tlv_if_limit, .num_different_channels = 1, .max_interfaces = 4, .n_limits = ARRAY_SIZE(ath10k_tlv_if_limit), }, { .limits = ath10k_tlv_qcs_if_limit, .num_different_channels = 2, .max_interfaces = 4, .n_limits = ARRAY_SIZE(ath10k_tlv_qcs_if_limit), }, { .limits = ath10k_tlv_if_limit_ibss, .num_different_channels = 1, .max_interfaces = 2, .n_limits = ARRAY_SIZE(ath10k_tlv_if_limit_ibss), }, }; static const struct ieee80211_iface_limit ath10k_10_4_if_limits[] = { { .max = 1, .types = BIT(NL80211_IFTYPE_STATION), }, { .max = 16, .types = BIT(NL80211_IFTYPE_AP) #ifdef CONFIG_MAC80211_MESH | BIT(NL80211_IFTYPE_MESH_POINT) #endif }, }; static const struct ieee80211_iface_combination ath10k_10_4_if_comb[] = { { .limits = ath10k_10_4_if_limits, .n_limits = ARRAY_SIZE(ath10k_10_4_if_limits), .max_interfaces = 16, .num_different_channels = 1, .beacon_int_infra_match = true, .beacon_int_min_gcd = 1, #ifdef CONFIG_ATH10K_DFS_CERTIFIED .radar_detect_widths = BIT(NL80211_CHAN_WIDTH_20_NOHT) | BIT(NL80211_CHAN_WIDTH_20) | BIT(NL80211_CHAN_WIDTH_40) | BIT(NL80211_CHAN_WIDTH_80) | BIT(NL80211_CHAN_WIDTH_80P80) | BIT(NL80211_CHAN_WIDTH_160), #endif }, }; static const struct ieee80211_iface_combination ath10k_10_4_bcn_int_if_comb[] = { { .limits = ath10k_10_4_if_limits, .n_limits = ARRAY_SIZE(ath10k_10_4_if_limits), .max_interfaces = 16, .num_different_channels = 1, .beacon_int_infra_match = true, .beacon_int_min_gcd = 100, #ifdef CONFIG_ATH10K_DFS_CERTIFIED .radar_detect_widths = BIT(NL80211_CHAN_WIDTH_20_NOHT) | BIT(NL80211_CHAN_WIDTH_20) | BIT(NL80211_CHAN_WIDTH_40) | BIT(NL80211_CHAN_WIDTH_80) | BIT(NL80211_CHAN_WIDTH_80P80) | BIT(NL80211_CHAN_WIDTH_160), #endif }, }; static void ath10k_get_arvif_iter(void *data, u8 *mac, struct ieee80211_vif *vif) { struct ath10k_vif_iter *arvif_iter = data; struct ath10k_vif *arvif = (void *)vif->drv_priv; if (arvif->vdev_id == arvif_iter->vdev_id) arvif_iter->arvif = arvif; } struct ath10k_vif *ath10k_get_arvif(struct ath10k *ar, u32 vdev_id) { struct ath10k_vif_iter arvif_iter; memset(&arvif_iter, 0, sizeof(struct ath10k_vif_iter)); arvif_iter.vdev_id = vdev_id; ieee80211_iterate_active_interfaces_atomic(ar->hw, ATH10K_ITER_RESUME_FLAGS, ath10k_get_arvif_iter, &arvif_iter); if (!arvif_iter.arvif) { ath10k_warn(ar, "No VIF found for vdev %d\n", vdev_id); return NULL; } return arvif_iter.arvif; } #define WRD_METHOD "WRDD" #define WRDD_WIFI (0x07) static u32 ath10k_mac_wrdd_get_mcc(struct ath10k *ar, union acpi_object *wrdd) { union acpi_object *mcc_pkg; union acpi_object *domain_type; union acpi_object *mcc_value; u32 i; if (wrdd->type != ACPI_TYPE_PACKAGE || wrdd->package.count < 2 || wrdd->package.elements[0].type != ACPI_TYPE_INTEGER || wrdd->package.elements[0].integer.value != 0) { ath10k_warn(ar, "ignoring malformed/unsupported wrdd structure\n"); return 0; } for (i = 1; i < wrdd->package.count; ++i) { mcc_pkg = &wrdd->package.elements[i]; if (mcc_pkg->type != ACPI_TYPE_PACKAGE) continue; if (mcc_pkg->package.count < 2) continue; if (mcc_pkg->package.elements[0].type != ACPI_TYPE_INTEGER || mcc_pkg->package.elements[1].type != ACPI_TYPE_INTEGER) continue; domain_type = &mcc_pkg->package.elements[0]; if (domain_type->integer.value != WRDD_WIFI) continue; mcc_value = &mcc_pkg->package.elements[1]; return mcc_value->integer.value; } return 0; } static int ath10k_mac_get_wrdd_regulatory(struct ath10k *ar, u16 *rd) { acpi_handle root_handle; acpi_handle handle; struct acpi_buffer wrdd = {ACPI_ALLOCATE_BUFFER, NULL}; acpi_status status; u32 alpha2_code; char alpha2[3]; root_handle = ACPI_HANDLE(ar->dev); if (!root_handle) return -EOPNOTSUPP; status = acpi_get_handle(root_handle, (acpi_string)WRD_METHOD, &handle); if (ACPI_FAILURE(status)) { ath10k_dbg(ar, ATH10K_DBG_BOOT, "failed to get wrd method %d\n", status); return -EIO; } status = acpi_evaluate_object(handle, NULL, NULL, &wrdd); if (ACPI_FAILURE(status)) { ath10k_dbg(ar, ATH10K_DBG_BOOT, "failed to call wrdc %d\n", status); return -EIO; } alpha2_code = ath10k_mac_wrdd_get_mcc(ar, wrdd.pointer); kfree(wrdd.pointer); if (!alpha2_code) return -EIO; alpha2[0] = (alpha2_code >> 8) & 0xff; alpha2[1] = (alpha2_code >> 0) & 0xff; alpha2[2] = '\0'; ath10k_dbg(ar, ATH10K_DBG_BOOT, "regulatory hint from WRDD (alpha2-code): %s\n", alpha2); *rd = ath_regd_find_country_by_name(alpha2); if (*rd == 0xffff) return -EIO; *rd |= COUNTRY_ERD_FLAG; return 0; } static int ath10k_mac_init_rd(struct ath10k *ar) { int ret; u16 rd; ret = ath10k_mac_get_wrdd_regulatory(ar, &rd); if (ret) { ath10k_dbg(ar, ATH10K_DBG_BOOT, "fallback to eeprom programmed regulatory settings\n"); rd = ar->hw_eeprom_rd; } ar->ath_common.regulatory.current_rd = rd; return 0; } int ath10k_mac_register(struct ath10k *ar) { static const u32 cipher_suites[] = { WLAN_CIPHER_SUITE_WEP40, WLAN_CIPHER_SUITE_WEP104, WLAN_CIPHER_SUITE_TKIP, WLAN_CIPHER_SUITE_CCMP, /* Do not add hardware supported ciphers before this line. * Allow software encryption for all chips. Don't forget to * update n_cipher_suites below. */ WLAN_CIPHER_SUITE_AES_CMAC, WLAN_CIPHER_SUITE_BIP_CMAC_256, WLAN_CIPHER_SUITE_BIP_GMAC_128, WLAN_CIPHER_SUITE_BIP_GMAC_256, /* Only QCA99x0 and QCA4019 variants support GCMP-128, GCMP-256 * and CCMP-256 in hardware. */ WLAN_CIPHER_SUITE_GCMP, WLAN_CIPHER_SUITE_GCMP_256, WLAN_CIPHER_SUITE_CCMP_256, }; struct ieee80211_supported_band *band; void *channels; int ret; if (!is_valid_ether_addr(ar->mac_addr)) { ath10k_warn(ar, "invalid MAC address; choosing random\n"); eth_random_addr(ar->mac_addr); } SET_IEEE80211_PERM_ADDR(ar->hw, ar->mac_addr); SET_IEEE80211_DEV(ar->hw, ar->dev); BUILD_BUG_ON((ARRAY_SIZE(ath10k_2ghz_channels) + ARRAY_SIZE(ath10k_5ghz_channels)) != ATH10K_NUM_CHANS); if (ar->phy_capability & WHAL_WLAN_11G_CAPABILITY) { channels = kmemdup(ath10k_2ghz_channels, sizeof(ath10k_2ghz_channels), GFP_KERNEL); if (!channels) { ret = -ENOMEM; goto err_free; } band = &ar->mac.sbands[NL80211_BAND_2GHZ]; band->n_channels = ARRAY_SIZE(ath10k_2ghz_channels); band->channels = channels; if (ar->hw_params.cck_rate_map_rev2) { band->n_bitrates = ath10k_g_rates_rev2_size; band->bitrates = ath10k_g_rates_rev2; } else { band->n_bitrates = ath10k_g_rates_size; band->bitrates = ath10k_g_rates; } ar->hw->wiphy->bands[NL80211_BAND_2GHZ] = band; } if (ar->phy_capability & WHAL_WLAN_11A_CAPABILITY) { channels = kmemdup(ath10k_5ghz_channels, sizeof(ath10k_5ghz_channels), GFP_KERNEL); if (!channels) { ret = -ENOMEM; goto err_free; } band = &ar->mac.sbands[NL80211_BAND_5GHZ]; band->n_channels = ARRAY_SIZE(ath10k_5ghz_channels); band->channels = channels; band->n_bitrates = ath10k_a_rates_size; band->bitrates = ath10k_a_rates; ar->hw->wiphy->bands[NL80211_BAND_5GHZ] = band; } wiphy_read_of_freq_limits(ar->hw->wiphy); ath10k_mac_setup_ht_vht_cap(ar); ar->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_AP) | BIT(NL80211_IFTYPE_MESH_POINT); ar->hw->wiphy->available_antennas_rx = ar->cfg_rx_chainmask; ar->hw->wiphy->available_antennas_tx = ar->cfg_tx_chainmask; if (!test_bit(ATH10K_FW_FEATURE_NO_P2P, ar->normal_mode_fw.fw_file.fw_features)) ar->hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_P2P_DEVICE) | BIT(NL80211_IFTYPE_P2P_CLIENT) | BIT(NL80211_IFTYPE_P2P_GO); ieee80211_hw_set(ar->hw, SIGNAL_DBM); if (!test_bit(ATH10K_FW_FEATURE_NO_PS, ar->running_fw->fw_file.fw_features)) { ieee80211_hw_set(ar->hw, SUPPORTS_PS); ieee80211_hw_set(ar->hw, SUPPORTS_DYNAMIC_PS); } ieee80211_hw_set(ar->hw, MFP_CAPABLE); ieee80211_hw_set(ar->hw, REPORTS_TX_ACK_STATUS); ieee80211_hw_set(ar->hw, HAS_RATE_CONTROL); ieee80211_hw_set(ar->hw, AP_LINK_PS); ieee80211_hw_set(ar->hw, SPECTRUM_MGMT); ieee80211_hw_set(ar->hw, SUPPORT_FAST_XMIT); ieee80211_hw_set(ar->hw, CONNECTION_MONITOR); ieee80211_hw_set(ar->hw, SUPPORTS_PER_STA_GTK); ieee80211_hw_set(ar->hw, WANT_MONITOR_VIF); ieee80211_hw_set(ar->hw, CHANCTX_STA_CSA); ieee80211_hw_set(ar->hw, QUEUE_CONTROL); ieee80211_hw_set(ar->hw, SUPPORTS_TX_FRAG); ieee80211_hw_set(ar->hw, REPORTS_LOW_ACK); if (!test_bit(ATH10K_FLAG_RAW_MODE, &ar->dev_flags)) ieee80211_hw_set(ar->hw, SW_CRYPTO_CONTROL); ar->hw->wiphy->features |= NL80211_FEATURE_STATIC_SMPS; ar->hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN; if (ar->ht_cap_info & WMI_HT_CAP_DYNAMIC_SMPS) ar->hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS; if (ar->ht_cap_info & WMI_HT_CAP_ENABLED) { ieee80211_hw_set(ar->hw, AMPDU_AGGREGATION); ieee80211_hw_set(ar->hw, TX_AMPDU_SETUP_IN_HW); } ar->hw->wiphy->max_scan_ssids = WLAN_SCAN_PARAMS_MAX_SSID; ar->hw->wiphy->max_scan_ie_len = WLAN_SCAN_PARAMS_MAX_IE_LEN; if (test_bit(WMI_SERVICE_NLO, ar->wmi.svc_map)) { ar->hw->wiphy->max_sched_scan_ssids = WMI_PNO_MAX_SUPP_NETWORKS; ar->hw->wiphy->max_match_sets = WMI_PNO_MAX_SUPP_NETWORKS; ar->hw->wiphy->max_sched_scan_ie_len = WMI_PNO_MAX_IE_LENGTH; ar->hw->wiphy->max_sched_scan_plans = WMI_PNO_MAX_SCHED_SCAN_PLANS; ar->hw->wiphy->max_sched_scan_plan_interval = WMI_PNO_MAX_SCHED_SCAN_PLAN_INT; ar->hw->wiphy->max_sched_scan_plan_iterations = WMI_PNO_MAX_SCHED_SCAN_PLAN_ITRNS; ar->hw->wiphy->features |= NL80211_FEATURE_ND_RANDOM_MAC_ADDR; } ar->hw->vif_data_size = sizeof(struct ath10k_vif); ar->hw->sta_data_size = sizeof(struct ath10k_sta); ar->hw->txq_data_size = sizeof(struct ath10k_txq); ar->hw->max_listen_interval = ATH10K_MAX_HW_LISTEN_INTERVAL; if (test_bit(WMI_SERVICE_BEACON_OFFLOAD, ar->wmi.svc_map)) { ar->hw->wiphy->flags |= WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD; /* Firmware delivers WPS/P2P Probe Requests frames to driver so * that userspace (e.g. wpa_supplicant/hostapd) can generate * correct Probe Responses. This is more of a hack advert.. */ ar->hw->wiphy->probe_resp_offload |= NL80211_PROBE_RESP_OFFLOAD_SUPPORT_WPS | NL80211_PROBE_RESP_OFFLOAD_SUPPORT_WPS2 | NL80211_PROBE_RESP_OFFLOAD_SUPPORT_P2P; } if (test_bit(WMI_SERVICE_TDLS, ar->wmi.svc_map) || test_bit(WMI_SERVICE_TDLS_EXPLICIT_MODE_ONLY, ar->wmi.svc_map)) { ar->hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS; if (test_bit(WMI_SERVICE_TDLS_WIDER_BANDWIDTH, ar->wmi.svc_map)) ieee80211_hw_set(ar->hw, TDLS_WIDER_BW); } if (test_bit(WMI_SERVICE_TDLS_UAPSD_BUFFER_STA, ar->wmi.svc_map)) ieee80211_hw_set(ar->hw, SUPPORTS_TDLS_BUFFER_STA); if (ath10k_frame_mode == ATH10K_HW_TXRX_ETHERNET) { if (ar->wmi.vdev_param->tx_encap_type != WMI_VDEV_PARAM_UNSUPPORTED) ieee80211_hw_set(ar->hw, SUPPORTS_TX_ENCAP_OFFLOAD); } ar->hw->wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; ar->hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH; ar->hw->wiphy->max_remain_on_channel_duration = 5000; ar->hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD; ar->hw->wiphy->features |= NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE | NL80211_FEATURE_AP_SCAN; ar->hw->wiphy->max_ap_assoc_sta = ar->max_num_stations; ret = ath10k_wow_init(ar); if (ret) { ath10k_warn(ar, "failed to init wow: %d\n", ret); goto err_free; } wiphy_ext_feature_set(ar->hw->wiphy, NL80211_EXT_FEATURE_VHT_IBSS); wiphy_ext_feature_set(ar->hw->wiphy, NL80211_EXT_FEATURE_SET_SCAN_DWELL); wiphy_ext_feature_set(ar->hw->wiphy, NL80211_EXT_FEATURE_AQL); if (ar->hw_params.mcast_frame_registration) wiphy_ext_feature_set(ar->hw->wiphy, NL80211_EXT_FEATURE_MULTICAST_REGISTRATIONS); if (test_bit(WMI_SERVICE_TX_DATA_ACK_RSSI, ar->wmi.svc_map) || test_bit(WMI_SERVICE_HTT_MGMT_TX_COMP_VALID_FLAGS, ar->wmi.svc_map)) wiphy_ext_feature_set(ar->hw->wiphy, NL80211_EXT_FEATURE_ACK_SIGNAL_SUPPORT); if (ath10k_peer_stats_enabled(ar) || test_bit(WMI_SERVICE_REPORT_AIRTIME, ar->wmi.svc_map)) wiphy_ext_feature_set(ar->hw->wiphy, NL80211_EXT_FEATURE_AIRTIME_FAIRNESS); if (test_bit(WMI_SERVICE_RTT_RESPONDER_ROLE, ar->wmi.svc_map)) wiphy_ext_feature_set(ar->hw->wiphy, NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER); if (test_bit(WMI_SERVICE_TX_PWR_PER_PEER, ar->wmi.svc_map)) wiphy_ext_feature_set(ar->hw->wiphy, NL80211_EXT_FEATURE_STA_TX_PWR); if (test_bit(WMI_SERVICE_PEER_TID_CONFIGS_SUPPORT, ar->wmi.svc_map)) { ar->hw->wiphy->tid_config_support.vif |= BIT(NL80211_TID_CONFIG_ATTR_NOACK) | BIT(NL80211_TID_CONFIG_ATTR_RETRY_SHORT) | BIT(NL80211_TID_CONFIG_ATTR_RETRY_LONG) | BIT(NL80211_TID_CONFIG_ATTR_AMPDU_CTRL) | BIT(NL80211_TID_CONFIG_ATTR_TX_RATE) | BIT(NL80211_TID_CONFIG_ATTR_TX_RATE_TYPE); if (test_bit(WMI_SERVICE_EXT_PEER_TID_CONFIGS_SUPPORT, ar->wmi.svc_map)) { ar->hw->wiphy->tid_config_support.vif |= BIT(NL80211_TID_CONFIG_ATTR_RTSCTS_CTRL); } ar->hw->wiphy->tid_config_support.peer = ar->hw->wiphy->tid_config_support.vif; ar->hw->wiphy->max_data_retry_count = ATH10K_MAX_RETRY_COUNT; } else { ar->ops->set_tid_config = NULL; } /* * on LL hardware queues are managed entirely by the FW * so we only advertise to mac we can do the queues thing */ ar->hw->queues = IEEE80211_MAX_QUEUES; /* vdev_ids are used as hw queue numbers. Make sure offchan tx queue is * something that vdev_ids can't reach so that we don't stop the queue * accidentally. */ ar->hw->offchannel_tx_hw_queue = IEEE80211_MAX_QUEUES - 1; switch (ar->running_fw->fw_file.wmi_op_version) { case ATH10K_FW_WMI_OP_VERSION_MAIN: ar->hw->wiphy->iface_combinations = ath10k_if_comb; ar->hw->wiphy->n_iface_combinations = ARRAY_SIZE(ath10k_if_comb); ar->hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_ADHOC); break; case ATH10K_FW_WMI_OP_VERSION_TLV: if (test_bit(WMI_SERVICE_ADAPTIVE_OCS, ar->wmi.svc_map)) { ar->hw->wiphy->iface_combinations = ath10k_tlv_qcs_if_comb; ar->hw->wiphy->n_iface_combinations = ARRAY_SIZE(ath10k_tlv_qcs_if_comb); } else { ar->hw->wiphy->iface_combinations = ath10k_tlv_if_comb; ar->hw->wiphy->n_iface_combinations = ARRAY_SIZE(ath10k_tlv_if_comb); } ar->hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_ADHOC); break; case ATH10K_FW_WMI_OP_VERSION_10_1: case ATH10K_FW_WMI_OP_VERSION_10_2: case ATH10K_FW_WMI_OP_VERSION_10_2_4: ar->hw->wiphy->iface_combinations = ath10k_10x_if_comb; ar->hw->wiphy->n_iface_combinations = ARRAY_SIZE(ath10k_10x_if_comb); break; case ATH10K_FW_WMI_OP_VERSION_10_4: ar->hw->wiphy->iface_combinations = ath10k_10_4_if_comb; ar->hw->wiphy->n_iface_combinations = ARRAY_SIZE(ath10k_10_4_if_comb); if (test_bit(WMI_SERVICE_VDEV_DIFFERENT_BEACON_INTERVAL_SUPPORT, ar->wmi.svc_map)) { ar->hw->wiphy->iface_combinations = ath10k_10_4_bcn_int_if_comb; ar->hw->wiphy->n_iface_combinations = ARRAY_SIZE(ath10k_10_4_bcn_int_if_comb); } break; case ATH10K_FW_WMI_OP_VERSION_UNSET: case ATH10K_FW_WMI_OP_VERSION_MAX: WARN_ON(1); ret = -EINVAL; goto err_free; } if (ar->hw_params.dynamic_sar_support) ar->hw->wiphy->sar_capa = &ath10k_sar_capa; if (!test_bit(ATH10K_FLAG_RAW_MODE, &ar->dev_flags)) ar->hw->netdev_features = NETIF_F_HW_CSUM; if (IS_ENABLED(CONFIG_ATH10K_DFS_CERTIFIED)) { /* Init ath dfs pattern detector */ ar->ath_common.debug_mask = ATH_DBG_DFS; ar->dfs_detector = dfs_pattern_detector_init(&ar->ath_common, NL80211_DFS_UNSET); if (!ar->dfs_detector) ath10k_warn(ar, "failed to initialise DFS pattern detector\n"); } ret = ath10k_mac_init_rd(ar); if (ret) { ath10k_err(ar, "failed to derive regdom: %d\n", ret); goto err_dfs_detector_exit; } /* Disable set_coverage_class for chipsets that do not support it. */ if (!ar->hw_params.hw_ops->set_coverage_class) ar->ops->set_coverage_class = NULL; ret = ath_regd_init(&ar->ath_common.regulatory, ar->hw->wiphy, ath10k_reg_notifier); if (ret) { ath10k_err(ar, "failed to initialise regulatory: %i\n", ret); goto err_dfs_detector_exit; } if (test_bit(WMI_SERVICE_SPOOF_MAC_SUPPORT, ar->wmi.svc_map)) { ar->hw->wiphy->features |= NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR; } ar->hw->wiphy->cipher_suites = cipher_suites; /* QCA988x and QCA6174 family chips do not support CCMP-256, GCMP-128 * and GCMP-256 ciphers in hardware. Fetch number of ciphers supported * from chip specific hw_param table. */ if (!ar->hw_params.n_cipher_suites || ar->hw_params.n_cipher_suites > ARRAY_SIZE(cipher_suites)) { ath10k_err(ar, "invalid hw_params.n_cipher_suites %d\n", ar->hw_params.n_cipher_suites); ar->hw_params.n_cipher_suites = 8; } ar->hw->wiphy->n_cipher_suites = ar->hw_params.n_cipher_suites; wiphy_ext_feature_set(ar->hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST); ar->hw->weight_multiplier = ATH10K_AIRTIME_WEIGHT_MULTIPLIER; ret = ieee80211_register_hw(ar->hw); if (ret) { ath10k_err(ar, "failed to register ieee80211: %d\n", ret); goto err_dfs_detector_exit; } if (test_bit(WMI_SERVICE_PER_PACKET_SW_ENCRYPT, ar->wmi.svc_map)) { ar->hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); ar->hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); } if (!ath_is_world_regd(&ar->ath_common.reg_world_copy) && !ath_is_world_regd(&ar->ath_common.regulatory)) { ret = regulatory_hint(ar->hw->wiphy, ar->ath_common.regulatory.alpha2); if (ret) goto err_unregister; } return 0; err_unregister: ieee80211_unregister_hw(ar->hw); err_dfs_detector_exit: if (IS_ENABLED(CONFIG_ATH10K_DFS_CERTIFIED) && ar->dfs_detector) ar->dfs_detector->exit(ar->dfs_detector); err_free: kfree(ar->mac.sbands[NL80211_BAND_2GHZ].channels); kfree(ar->mac.sbands[NL80211_BAND_5GHZ].channels); SET_IEEE80211_DEV(ar->hw, NULL); return ret; } void ath10k_mac_unregister(struct ath10k *ar) { ieee80211_unregister_hw(ar->hw); if (IS_ENABLED(CONFIG_ATH10K_DFS_CERTIFIED) && ar->dfs_detector) ar->dfs_detector->exit(ar->dfs_detector); kfree(ar->mac.sbands[NL80211_BAND_2GHZ].channels); kfree(ar->mac.sbands[NL80211_BAND_5GHZ].channels); SET_IEEE80211_DEV(ar->hw, NULL); } |
| 48 23 11 11 11 11 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 | /* SPDX-License-Identifier: GPL-2.0-or-later */ /* * include/linux/if_team.h - Network team device driver header * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com> */ #ifndef _LINUX_IF_TEAM_H_ #define _LINUX_IF_TEAM_H_ #include <linux/netpoll.h> #include <net/sch_generic.h> #include <linux/types.h> #include <uapi/linux/if_team.h> struct team_pcpu_stats { u64_stats_t rx_packets; u64_stats_t rx_bytes; u64_stats_t rx_multicast; u64_stats_t tx_packets; u64_stats_t tx_bytes; struct u64_stats_sync syncp; u32 rx_dropped; u32 tx_dropped; u32 rx_nohandler; }; struct team; struct team_port { struct net_device *dev; struct hlist_node hlist; /* node in enabled ports hash list */ struct list_head list; /* node in ordinary list */ struct team *team; int index; /* index of enabled port. If disabled, it's set to -1 */ bool linkup; /* either state.linkup or user.linkup */ struct { bool linkup; u32 speed; u8 duplex; } state; /* Values set by userspace */ struct { bool linkup; bool linkup_enabled; } user; /* Custom gennetlink interface related flags */ bool changed; bool removed; /* * A place for storing original values of the device before it * become a port. */ struct { unsigned char dev_addr[MAX_ADDR_LEN]; unsigned int mtu; } orig; #ifdef CONFIG_NET_POLL_CONTROLLER struct netpoll *np; #endif s32 priority; /* lower number ~ higher priority */ u16 queue_id; struct list_head qom_list; /* node in queue override mapping list */ struct rcu_head rcu; long mode_priv[]; }; static inline struct team_port *team_port_get_rcu(const struct net_device *dev) { return rcu_dereference(dev->rx_handler_data); } static inline bool team_port_enabled(struct team_port *port) { return port->index != -1; } static inline bool team_port_txable(struct team_port *port) { return port->linkup && team_port_enabled(port); } static inline bool team_port_dev_txable(const struct net_device *port_dev) { struct team_port *port; bool txable; rcu_read_lock(); port = team_port_get_rcu(port_dev); txable = port ? team_port_txable(port) : false; rcu_read_unlock(); return txable; } #ifdef CONFIG_NET_POLL_CONTROLLER static inline void team_netpoll_send_skb(struct team_port *port, struct sk_buff *skb) { netpoll_send_skb(port->np, skb); } #else static inline void team_netpoll_send_skb(struct team_port *port, struct sk_buff *skb) { } #endif struct team_mode_ops { int (*init)(struct team *team); void (*exit)(struct team *team); rx_handler_result_t (*receive)(struct team *team, struct team_port *port, struct sk_buff *skb); bool (*transmit)(struct team *team, struct sk_buff *skb); int (*port_enter)(struct team *team, struct team_port *port); void (*port_leave)(struct team *team, struct team_port *port); void (*port_change_dev_addr)(struct team *team, struct team_port *port); void (*port_enabled)(struct team *team, struct team_port *port); void (*port_disabled)(struct team *team, struct team_port *port); }; extern int team_modeop_port_enter(struct team *team, struct team_port *port); extern void team_modeop_port_change_dev_addr(struct team *team, struct team_port *port); enum team_option_type { TEAM_OPTION_TYPE_U32, TEAM_OPTION_TYPE_STRING, TEAM_OPTION_TYPE_BINARY, TEAM_OPTION_TYPE_BOOL, TEAM_OPTION_TYPE_S32, }; struct team_option_inst_info { u32 array_index; struct team_port *port; /* != NULL if per-port */ }; struct team_gsetter_ctx { union { u32 u32_val; const char *str_val; struct { const void *ptr; u32 len; } bin_val; bool bool_val; s32 s32_val; } data; struct team_option_inst_info *info; }; struct team_option { struct list_head list; const char *name; bool per_port; unsigned int array_size; /* != 0 means the option is array */ enum team_option_type type; void (*init)(struct team *team, struct team_option_inst_info *info); void (*getter)(struct team *team, struct team_gsetter_ctx *ctx); int (*setter)(struct team *team, struct team_gsetter_ctx *ctx); }; extern void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info); extern void team_options_change_check(struct team *team); struct team_mode { const char *kind; struct module *owner; size_t priv_size; size_t port_priv_size; const struct team_mode_ops *ops; enum netdev_lag_tx_type lag_tx_type; }; #define TEAM_PORT_HASHBITS 4 #define TEAM_PORT_HASHENTRIES (1 << TEAM_PORT_HASHBITS) #define TEAM_MODE_PRIV_LONGS 4 #define TEAM_MODE_PRIV_SIZE (sizeof(long) * TEAM_MODE_PRIV_LONGS) struct team { struct net_device *dev; /* associated netdevice */ struct team_pcpu_stats __percpu *pcpu_stats; const struct header_ops *header_ops_cache; /* * List of enabled ports and their count */ int en_port_count; struct hlist_head en_port_hlist[TEAM_PORT_HASHENTRIES]; struct list_head port_list; /* list of all ports */ struct list_head option_list; struct list_head option_inst_list; /* list of option instances */ const struct team_mode *mode; struct team_mode_ops ops; bool user_carrier_enabled; bool queue_override_enabled; struct list_head *qom_lists; /* array of queue override mapping lists */ bool port_mtu_change_allowed; bool notifier_ctx; struct { unsigned int count; unsigned int interval; /* in ms */ atomic_t count_pending; struct delayed_work dw; } notify_peers; struct { unsigned int count; unsigned int interval; /* in ms */ atomic_t count_pending; struct delayed_work dw; } mcast_rejoin; long mode_priv[TEAM_MODE_PRIV_LONGS]; }; static inline int team_dev_queue_xmit(struct team *team, struct team_port *port, struct sk_buff *skb) { BUILD_BUG_ON(sizeof(skb->queue_mapping) != sizeof(qdisc_skb_cb(skb)->slave_dev_queue_mapping)); skb_set_queue_mapping(skb, qdisc_skb_cb(skb)->slave_dev_queue_mapping); skb->dev = port->dev; if (unlikely(netpoll_tx_running(team->dev))) { team_netpoll_send_skb(port, skb); return 0; } return dev_queue_xmit(skb); } static inline struct hlist_head *team_port_index_hash(struct team *team, int port_index) { return &team->en_port_hlist[port_index & (TEAM_PORT_HASHENTRIES - 1)]; } static inline struct team_port *team_get_port_by_index(struct team *team, int port_index) { struct team_port *port; struct hlist_head *head = team_port_index_hash(team, port_index); hlist_for_each_entry(port, head, hlist) if (port->index == port_index) return port; return NULL; } static inline int team_num_to_port_index(struct team *team, unsigned int num) { int en_port_count = READ_ONCE(team->en_port_count); if (unlikely(!en_port_count)) return 0; return num % en_port_count; } static inline struct team_port *team_get_port_by_index_rcu(struct team *team, int port_index) { struct team_port *port; struct hlist_head *head = team_port_index_hash(team, port_index); hlist_for_each_entry_rcu(port, head, hlist) if (port->index == port_index) return port; return NULL; } static inline struct team_port * team_get_first_port_txable_rcu(struct team *team, struct team_port *port) { struct team_port *cur; if (likely(team_port_txable(port))) return port; cur = port; list_for_each_entry_continue_rcu(cur, &team->port_list, list) if (team_port_txable(cur)) return cur; list_for_each_entry_rcu(cur, &team->port_list, list) { if (cur == port) break; if (team_port_txable(cur)) return cur; } return NULL; } extern int team_options_register(struct team *team, const struct team_option *option, size_t option_count); extern void team_options_unregister(struct team *team, const struct team_option *option, size_t option_count); extern int team_mode_register(const struct team_mode *mode); extern void team_mode_unregister(const struct team_mode *mode); #define TEAM_DEFAULT_NUM_TX_QUEUES 16 #define TEAM_DEFAULT_NUM_RX_QUEUES 16 #define MODULE_ALIAS_TEAM_MODE(kind) MODULE_ALIAS("team-mode-" kind) #endif /* _LINUX_IF_TEAM_H_ */ |
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SPDX-License-Identifier: GPL-2.0+ /* * HID driver for UC-Logic devices not fully compliant with HID standard * - original and fixed report descriptors * * Copyright (c) 2010-2017 Nikolai Kondrashov * Copyright (c) 2013 Martin Rusko */ /* * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the Free * Software Foundation; either version 2 of the License, or (at your option) * any later version. */ #include "hid-uclogic-rdesc.h" #include <linux/slab.h> #include <linux/unaligned.h> #include <kunit/visibility.h> /* Fixed WP4030U report descriptor */ const __u8 uclogic_rdesc_wp4030u_fixed_arr[] = { 0x05, 0x0D, /* Usage Page (Digitizer), */ 0x09, 0x01, /* Usage (Digitizer), */ 0xA1, 0x01, /* Collection (Application), */ 0x85, 0x09, /* Report ID (9), */ 0x09, 0x20, /* Usage (Stylus), */ 0xA0, /* Collection (Physical), */ 0x75, 0x01, /* Report Size (1), */ 0x09, 0x42, /* Usage (Tip Switch), */ 0x09, 0x44, /* Usage (Barrel Switch), */ 0x09, 0x46, /* Usage (Tablet Pick), */ 0x14, /* Logical Minimum (0), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x95, 0x03, /* Report Count (3), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x05, /* Report Count (5), */ 0x81, 0x01, /* Input (Constant), */ 0x75, 0x10, /* Report Size (16), */ 0x95, 0x01, /* Report Count (1), */ 0x14, /* Logical Minimum (0), */ 0xA4, /* Push, */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x55, 0xFD, /* Unit Exponent (-3), */ 0x65, 0x13, /* Unit (Inch), */ 0x34, /* Physical Minimum (0), */ 0x09, 0x30, /* Usage (X), */ 0x46, 0xA0, 0x0F, /* Physical Maximum (4000), */ 0x26, 0xFF, 0x7F, /* Logical Maximum (32767), */ 0x81, 0x02, /* Input (Variable), */ 0x09, 0x31, /* Usage (Y), */ 0x46, 0xB8, 0x0B, /* Physical Maximum (3000), */ 0x26, 0xFF, 0x7F, /* Logical Maximum (32767), */ 0x81, 0x02, /* Input (Variable), */ 0xB4, /* Pop, */ 0x09, 0x30, /* Usage (Tip Pressure), */ 0x26, 0xFF, 0x03, /* Logical Maximum (1023), */ 0x81, 0x02, /* Input (Variable), */ 0xC0, /* End Collection, */ 0xC0 /* End Collection */ }; const size_t uclogic_rdesc_wp4030u_fixed_size = sizeof(uclogic_rdesc_wp4030u_fixed_arr); /* Fixed WP5540U report descriptor */ const __u8 uclogic_rdesc_wp5540u_fixed_arr[] = { 0x05, 0x0D, /* Usage Page (Digitizer), */ 0x09, 0x01, /* Usage (Digitizer), */ 0xA1, 0x01, /* Collection (Application), */ 0x85, 0x09, /* Report ID (9), */ 0x09, 0x20, /* Usage (Stylus), */ 0xA0, /* Collection (Physical), */ 0x75, 0x01, /* Report Size (1), */ 0x09, 0x42, /* Usage (Tip Switch), */ 0x09, 0x44, /* Usage (Barrel Switch), */ 0x09, 0x46, /* Usage (Tablet Pick), */ 0x14, /* Logical Minimum (0), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x95, 0x03, /* Report Count (3), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x05, /* Report Count (5), */ 0x81, 0x01, /* Input (Constant), */ 0x75, 0x10, /* Report Size (16), */ 0x95, 0x01, /* Report Count (1), */ 0x14, /* Logical Minimum (0), */ 0xA4, /* Push, */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x55, 0xFD, /* Unit Exponent (-3), */ 0x65, 0x13, /* Unit (Inch), */ 0x34, /* Physical Minimum (0), */ 0x09, 0x30, /* Usage (X), */ 0x46, 0x7C, 0x15, /* Physical Maximum (5500), */ 0x26, 0xFF, 0x7F, /* Logical Maximum (32767), */ 0x81, 0x02, /* Input (Variable), */ 0x09, 0x31, /* Usage (Y), */ 0x46, 0xA0, 0x0F, /* Physical Maximum (4000), */ 0x26, 0xFF, 0x7F, /* Logical Maximum (32767), */ 0x81, 0x02, /* Input (Variable), */ 0xB4, /* Pop, */ 0x09, 0x30, /* Usage (Tip Pressure), */ 0x26, 0xFF, 0x03, /* Logical Maximum (1023), */ 0x81, 0x02, /* Input (Variable), */ 0xC0, /* End Collection, */ 0xC0, /* End Collection, */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x02, /* Usage (Mouse), */ 0xA1, 0x01, /* Collection (Application), */ 0x85, 0x08, /* Report ID (8), */ 0x09, 0x01, /* Usage (Pointer), */ 0xA0, /* Collection (Physical), */ 0x75, 0x01, /* Report Size (1), */ 0x05, 0x09, /* Usage Page (Button), */ 0x19, 0x01, /* Usage Minimum (01h), */ 0x29, 0x03, /* Usage Maximum (03h), */ 0x14, /* Logical Minimum (0), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x95, 0x03, /* Report Count (3), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x05, /* Report Count (5), */ 0x81, 0x01, /* Input (Constant), */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x75, 0x08, /* Report Size (8), */ 0x09, 0x30, /* Usage (X), */ 0x09, 0x31, /* Usage (Y), */ 0x15, 0x81, /* Logical Minimum (-127), */ 0x25, 0x7F, /* Logical Maximum (127), */ 0x95, 0x02, /* Report Count (2), */ 0x81, 0x06, /* Input (Variable, Relative), */ 0x09, 0x38, /* Usage (Wheel), */ 0x15, 0xFF, /* Logical Minimum (-1), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x95, 0x01, /* Report Count (1), */ 0x81, 0x06, /* Input (Variable, Relative), */ 0x81, 0x01, /* Input (Constant), */ 0xC0, /* End Collection, */ 0xC0 /* End Collection */ }; const size_t uclogic_rdesc_wp5540u_fixed_size = sizeof(uclogic_rdesc_wp5540u_fixed_arr); /* Fixed WP8060U report descriptor */ const __u8 uclogic_rdesc_wp8060u_fixed_arr[] = { 0x05, 0x0D, /* Usage Page (Digitizer), */ 0x09, 0x01, /* Usage (Digitizer), */ 0xA1, 0x01, /* Collection (Application), */ 0x85, 0x09, /* Report ID (9), */ 0x09, 0x20, /* Usage (Stylus), */ 0xA0, /* Collection (Physical), */ 0x75, 0x01, /* Report Size (1), */ 0x09, 0x42, /* Usage (Tip Switch), */ 0x09, 0x44, /* Usage (Barrel Switch), */ 0x09, 0x46, /* Usage (Tablet Pick), */ 0x14, /* Logical Minimum (0), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x95, 0x03, /* Report Count (3), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x05, /* Report Count (5), */ 0x81, 0x01, /* Input (Constant), */ 0x75, 0x10, /* Report Size (16), */ 0x95, 0x01, /* Report Count (1), */ 0x14, /* Logical Minimum (0), */ 0xA4, /* Push, */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x55, 0xFD, /* Unit Exponent (-3), */ 0x65, 0x13, /* Unit (Inch), */ 0x34, /* Physical Minimum (0), */ 0x09, 0x30, /* Usage (X), */ 0x46, 0x40, 0x1F, /* Physical Maximum (8000), */ 0x26, 0xFF, 0x7F, /* Logical Maximum (32767), */ 0x81, 0x02, /* Input (Variable), */ 0x09, 0x31, /* Usage (Y), */ 0x46, 0x70, 0x17, /* Physical Maximum (6000), */ 0x26, 0xFF, 0x7F, /* Logical Maximum (32767), */ 0x81, 0x02, /* Input (Variable), */ 0xB4, /* Pop, */ 0x09, 0x30, /* Usage (Tip Pressure), */ 0x26, 0xFF, 0x03, /* Logical Maximum (1023), */ 0x81, 0x02, /* Input (Variable), */ 0xC0, /* End Collection, */ 0xC0, /* End Collection, */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x02, /* Usage (Mouse), */ 0xA1, 0x01, /* Collection (Application), */ 0x85, 0x08, /* Report ID (8), */ 0x09, 0x01, /* Usage (Pointer), */ 0xA0, /* Collection (Physical), */ 0x75, 0x01, /* Report Size (1), */ 0x05, 0x09, /* Usage Page (Button), */ 0x19, 0x01, /* Usage Minimum (01h), */ 0x29, 0x03, /* Usage Maximum (03h), */ 0x14, /* Logical Minimum (0), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x95, 0x03, /* Report Count (3), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x05, /* Report Count (5), */ 0x81, 0x01, /* Input (Constant), */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x75, 0x08, /* Report Size (8), */ 0x09, 0x30, /* Usage (X), */ 0x09, 0x31, /* Usage (Y), */ 0x15, 0x81, /* Logical Minimum (-127), */ 0x25, 0x7F, /* Logical Maximum (127), */ 0x95, 0x02, /* Report Count (2), */ 0x81, 0x06, /* Input (Variable, Relative), */ 0x09, 0x38, /* Usage (Wheel), */ 0x15, 0xFF, /* Logical Minimum (-1), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x95, 0x01, /* Report Count (1), */ 0x81, 0x06, /* Input (Variable, Relative), */ 0x81, 0x01, /* Input (Constant), */ 0xC0, /* End Collection, */ 0xC0 /* End Collection */ }; const size_t uclogic_rdesc_wp8060u_fixed_size = sizeof(uclogic_rdesc_wp8060u_fixed_arr); /* Fixed WP1062 report descriptor */ const __u8 uclogic_rdesc_wp1062_fixed_arr[] = { 0x05, 0x0D, /* Usage Page (Digitizer), */ 0x09, 0x01, /* Usage (Digitizer), */ 0xA1, 0x01, /* Collection (Application), */ 0x85, 0x09, /* Report ID (9), */ 0x09, 0x20, /* Usage (Stylus), */ 0xA0, /* Collection (Physical), */ 0x75, 0x01, /* Report Size (1), */ 0x09, 0x42, /* Usage (Tip Switch), */ 0x09, 0x44, /* Usage (Barrel Switch), */ 0x09, 0x46, /* Usage (Tablet Pick), */ 0x14, /* Logical Minimum (0), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x95, 0x03, /* Report Count (3), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x04, /* Report Count (4), */ 0x81, 0x01, /* Input (Constant), */ 0x09, 0x32, /* Usage (In Range), */ 0x95, 0x01, /* Report Count (1), */ 0x81, 0x02, /* Input (Variable), */ 0x75, 0x10, /* Report Size (16), */ 0x95, 0x01, /* Report Count (1), */ 0x14, /* Logical Minimum (0), */ 0xA4, /* Push, */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x55, 0xFD, /* Unit Exponent (-3), */ 0x65, 0x13, /* Unit (Inch), */ 0x34, /* Physical Minimum (0), */ 0x09, 0x30, /* Usage (X), */ 0x46, 0x10, 0x27, /* Physical Maximum (10000), */ 0x26, 0x20, 0x4E, /* Logical Maximum (20000), */ 0x81, 0x02, /* Input (Variable), */ 0x09, 0x31, /* Usage (Y), */ 0x46, 0xB7, 0x19, /* Physical Maximum (6583), */ 0x26, 0x6E, 0x33, /* Logical Maximum (13166), */ 0x81, 0x02, /* Input (Variable), */ 0xB4, /* Pop, */ 0x09, 0x30, /* Usage (Tip Pressure), */ 0x26, 0xFF, 0x03, /* Logical Maximum (1023), */ 0x81, 0x02, /* Input (Variable), */ 0xC0, /* End Collection, */ 0xC0 /* End Collection */ }; const size_t uclogic_rdesc_wp1062_fixed_size = sizeof(uclogic_rdesc_wp1062_fixed_arr); /* Fixed PF1209 report descriptor */ const __u8 uclogic_rdesc_pf1209_fixed_arr[] = { 0x05, 0x0D, /* Usage Page (Digitizer), */ 0x09, 0x01, /* Usage (Digitizer), */ 0xA1, 0x01, /* Collection (Application), */ 0x85, 0x09, /* Report ID (9), */ 0x09, 0x20, /* Usage (Stylus), */ 0xA0, /* Collection (Physical), */ 0x75, 0x01, /* Report Size (1), */ 0x09, 0x42, /* Usage (Tip Switch), */ 0x09, 0x44, /* Usage (Barrel Switch), */ 0x09, 0x46, /* Usage (Tablet Pick), */ 0x14, /* Logical Minimum (0), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x95, 0x03, /* Report Count (3), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x05, /* Report Count (5), */ 0x81, 0x01, /* Input (Constant), */ 0x75, 0x10, /* Report Size (16), */ 0x95, 0x01, /* Report Count (1), */ 0x14, /* Logical Minimum (0), */ 0xA4, /* Push, */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x55, 0xFD, /* Unit Exponent (-3), */ 0x65, 0x13, /* Unit (Inch), */ 0x34, /* Physical Minimum (0), */ 0x09, 0x30, /* Usage (X), */ 0x46, 0xE0, 0x2E, /* Physical Maximum (12000), */ 0x26, 0xFF, 0x7F, /* Logical Maximum (32767), */ 0x81, 0x02, /* Input (Variable), */ 0x09, 0x31, /* Usage (Y), */ 0x46, 0x28, 0x23, /* Physical Maximum (9000), */ 0x26, 0xFF, 0x7F, /* Logical Maximum (32767), */ 0x81, 0x02, /* Input (Variable), */ 0xB4, /* Pop, */ 0x09, 0x30, /* Usage (Tip Pressure), */ 0x26, 0xFF, 0x03, /* Logical Maximum (1023), */ 0x81, 0x02, /* Input (Variable), */ 0xC0, /* End Collection, */ 0xC0, /* End Collection, */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x02, /* Usage (Mouse), */ 0xA1, 0x01, /* Collection (Application), */ 0x85, 0x08, /* Report ID (8), */ 0x09, 0x01, /* Usage (Pointer), */ 0xA0, /* Collection (Physical), */ 0x75, 0x01, /* Report Size (1), */ 0x05, 0x09, /* Usage Page (Button), */ 0x19, 0x01, /* Usage Minimum (01h), */ 0x29, 0x03, /* Usage Maximum (03h), */ 0x14, /* Logical Minimum (0), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x95, 0x03, /* Report Count (3), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x05, /* Report Count (5), */ 0x81, 0x01, /* Input (Constant), */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x75, 0x08, /* Report Size (8), */ 0x09, 0x30, /* Usage (X), */ 0x09, 0x31, /* Usage (Y), */ 0x15, 0x81, /* Logical Minimum (-127), */ 0x25, 0x7F, /* Logical Maximum (127), */ 0x95, 0x02, /* Report Count (2), */ 0x81, 0x06, /* Input (Variable, Relative), */ 0x09, 0x38, /* Usage (Wheel), */ 0x15, 0xFF, /* Logical Minimum (-1), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x95, 0x01, /* Report Count (1), */ 0x81, 0x06, /* Input (Variable, Relative), */ 0x81, 0x01, /* Input (Constant), */ 0xC0, /* End Collection, */ 0xC0 /* End Collection */ }; const size_t uclogic_rdesc_pf1209_fixed_size = sizeof(uclogic_rdesc_pf1209_fixed_arr); /* Fixed PID 0522 tablet report descriptor, interface 0 (stylus) */ const __u8 uclogic_rdesc_twhl850_fixed0_arr[] = { 0x05, 0x0D, /* Usage Page (Digitizer), */ 0x09, 0x01, /* Usage (Digitizer), */ 0xA1, 0x01, /* Collection (Application), */ 0x85, 0x09, /* Report ID (9), */ 0x09, 0x20, /* Usage (Stylus), */ 0xA0, /* Collection (Physical), */ 0x14, /* Logical Minimum (0), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x75, 0x01, /* Report Size (1), */ 0x95, 0x03, /* Report Count (3), */ 0x09, 0x42, /* Usage (Tip Switch), */ 0x09, 0x44, /* Usage (Barrel Switch), */ 0x09, 0x46, /* Usage (Tablet Pick), */ 0x81, 0x02, /* Input (Variable), */ 0x81, 0x03, /* Input (Constant, Variable), */ 0x95, 0x01, /* Report Count (1), */ 0x09, 0x32, /* Usage (In Range), */ 0x81, 0x02, /* Input (Variable), */ 0x81, 0x03, /* Input (Constant, Variable), */ 0x75, 0x10, /* Report Size (16), */ 0xA4, /* Push, */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x65, 0x13, /* Unit (Inch), */ 0x55, 0xFD, /* Unit Exponent (-3), */ 0x34, /* Physical Minimum (0), */ 0x09, 0x30, /* Usage (X), */ 0x46, 0x40, 0x1F, /* Physical Maximum (8000), */ 0x26, 0x00, 0x7D, /* Logical Maximum (32000), */ 0x81, 0x02, /* Input (Variable), */ 0x09, 0x31, /* Usage (Y), */ 0x46, 0x88, 0x13, /* Physical Maximum (5000), */ 0x26, 0x20, 0x4E, /* Logical Maximum (20000), */ 0x81, 0x02, /* Input (Variable), */ 0xB4, /* Pop, */ 0x09, 0x30, /* Usage (Tip Pressure), */ 0x26, 0xFF, 0x03, /* Logical Maximum (1023), */ 0x81, 0x02, /* Input (Variable), */ 0xC0, /* End Collection, */ 0xC0 /* End Collection */ }; const size_t uclogic_rdesc_twhl850_fixed0_size = sizeof(uclogic_rdesc_twhl850_fixed0_arr); /* Fixed PID 0522 tablet report descriptor, interface 1 (mouse) */ const __u8 uclogic_rdesc_twhl850_fixed1_arr[] = { 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x02, /* Usage (Mouse), */ 0xA1, 0x01, /* Collection (Application), */ 0x85, 0x01, /* Report ID (1), */ 0x09, 0x01, /* Usage (Pointer), */ 0xA0, /* Collection (Physical), */ 0x05, 0x09, /* Usage Page (Button), */ 0x75, 0x01, /* Report Size (1), */ 0x95, 0x03, /* Report Count (3), */ 0x19, 0x01, /* Usage Minimum (01h), */ 0x29, 0x03, /* Usage Maximum (03h), */ 0x14, /* Logical Minimum (0), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x05, /* Report Count (5), */ 0x81, 0x03, /* Input (Constant, Variable), */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x30, /* Usage (X), */ 0x09, 0x31, /* Usage (Y), */ 0x16, 0x00, 0x80, /* Logical Minimum (-32768), */ 0x26, 0xFF, 0x7F, /* Logical Maximum (32767), */ 0x75, 0x10, /* Report Size (16), */ 0x95, 0x02, /* Report Count (2), */ 0x81, 0x06, /* Input (Variable, Relative), */ 0x09, 0x38, /* Usage (Wheel), */ 0x15, 0xFF, /* Logical Minimum (-1), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x95, 0x01, /* Report Count (1), */ 0x75, 0x08, /* Report Size (8), */ 0x81, 0x06, /* Input (Variable, Relative), */ 0x81, 0x03, /* Input (Constant, Variable), */ 0xC0, /* End Collection, */ 0xC0 /* End Collection */ }; const size_t uclogic_rdesc_twhl850_fixed1_size = sizeof(uclogic_rdesc_twhl850_fixed1_arr); /* Fixed PID 0522 tablet report descriptor, interface 2 (frame buttons) */ const __u8 uclogic_rdesc_twhl850_fixed2_arr[] = { 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x06, /* Usage (Keyboard), */ 0xA1, 0x01, /* Collection (Application), */ 0x85, 0x03, /* Report ID (3), */ 0x05, 0x07, /* Usage Page (Keyboard), */ 0x14, /* Logical Minimum (0), */ 0x19, 0xE0, /* Usage Minimum (KB Leftcontrol), */ 0x29, 0xE7, /* Usage Maximum (KB Right GUI), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x75, 0x01, /* Report Size (1), */ 0x95, 0x08, /* Report Count (8), */ 0x81, 0x02, /* Input (Variable), */ 0x18, /* Usage Minimum (None), */ 0x29, 0xFF, /* Usage Maximum (FFh), */ 0x26, 0xFF, 0x00, /* Logical Maximum (255), */ 0x75, 0x08, /* Report Size (8), */ 0x95, 0x06, /* Report Count (6), */ 0x80, /* Input, */ 0xC0 /* End Collection */ }; const size_t uclogic_rdesc_twhl850_fixed2_size = sizeof(uclogic_rdesc_twhl850_fixed2_arr); /* Fixed TWHA60 report descriptor, interface 0 (stylus) */ const __u8 uclogic_rdesc_twha60_fixed0_arr[] = { 0x05, 0x0D, /* Usage Page (Digitizer), */ 0x09, 0x01, /* Usage (Digitizer), */ 0xA1, 0x01, /* Collection (Application), */ 0x85, 0x09, /* Report ID (9), */ 0x09, 0x20, /* Usage (Stylus), */ 0xA0, /* Collection (Physical), */ 0x75, 0x01, /* Report Size (1), */ 0x09, 0x42, /* Usage (Tip Switch), */ 0x09, 0x44, /* Usage (Barrel Switch), */ 0x09, 0x46, /* Usage (Tablet Pick), */ 0x14, /* Logical Minimum (0), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x95, 0x03, /* Report Count (3), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x04, /* Report Count (4), */ 0x81, 0x01, /* Input (Constant), */ 0x09, 0x32, /* Usage (In Range), */ 0x95, 0x01, /* Report Count (1), */ 0x81, 0x02, /* Input (Variable), */ 0x75, 0x10, /* Report Size (16), */ 0x95, 0x01, /* Report Count (1), */ 0x14, /* Logical Minimum (0), */ 0xA4, /* Push, */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x55, 0xFD, /* Unit Exponent (-3), */ 0x65, 0x13, /* Unit (Inch), */ 0x34, /* Physical Minimum (0), */ 0x09, 0x30, /* Usage (X), */ 0x46, 0x10, 0x27, /* Physical Maximum (10000), */ 0x27, 0x3F, 0x9C, 0x00, 0x00, /* Logical Maximum (39999), */ 0x81, 0x02, /* Input (Variable), */ 0x09, 0x31, /* Usage (Y), */ 0x46, 0x6A, 0x18, /* Physical Maximum (6250), */ 0x26, 0xA7, 0x61, /* Logical Maximum (24999), */ 0x81, 0x02, /* Input (Variable), */ 0xB4, /* Pop, */ 0x09, 0x30, /* Usage (Tip Pressure), */ 0x26, 0xFF, 0x03, /* Logical Maximum (1023), */ 0x81, 0x02, /* Input (Variable), */ 0xC0, /* End Collection, */ 0xC0 /* End Collection */ }; const size_t uclogic_rdesc_twha60_fixed0_size = sizeof(uclogic_rdesc_twha60_fixed0_arr); /* Fixed TWHA60 report descriptor, interface 1 (frame buttons) */ const __u8 uclogic_rdesc_twha60_fixed1_arr[] = { 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x06, /* Usage (Keyboard), */ 0xA1, 0x01, /* Collection (Application), */ 0x85, 0x05, /* Report ID (5), */ 0x05, 0x07, /* Usage Page (Keyboard), */ 0x14, /* Logical Minimum (0), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x75, 0x01, /* Report Size (1), */ 0x95, 0x08, /* Report Count (8), */ 0x81, 0x01, /* Input (Constant), */ 0x95, 0x0C, /* Report Count (12), */ 0x19, 0x3A, /* Usage Minimum (KB F1), */ 0x29, 0x45, /* Usage Maximum (KB F12), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x0C, /* Report Count (12), */ 0x19, 0x68, /* Usage Minimum (KB F13), */ 0x29, 0x73, /* Usage Maximum (KB F24), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x08, /* Report Count (8), */ 0x81, 0x01, /* Input (Constant), */ 0xC0 /* End Collection */ }; const size_t uclogic_rdesc_twha60_fixed1_size = sizeof(uclogic_rdesc_twha60_fixed1_arr); /* Fixed report descriptor template for (tweaked) v1 pen reports */ const __u8 uclogic_rdesc_v1_pen_template_arr[] = { 0x05, 0x0D, /* Usage Page (Digitizer), */ 0x09, 0x01, /* Usage (Digitizer), */ 0xA1, 0x01, /* Collection (Application), */ 0x85, 0x07, /* Report ID (7), */ 0x09, 0x20, /* Usage (Stylus), */ 0xA0, /* Collection (Physical), */ 0x14, /* Logical Minimum (0), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x75, 0x01, /* Report Size (1), */ 0x09, 0x42, /* Usage (Tip Switch), */ 0x09, 0x44, /* Usage (Barrel Switch), */ 0x09, 0x46, /* Usage (Tablet Pick), */ 0x95, 0x03, /* Report Count (3), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x03, /* Report Count (3), */ 0x81, 0x03, /* Input (Constant, Variable), */ 0x09, 0x32, /* Usage (In Range), */ 0x95, 0x01, /* Report Count (1), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x01, /* Report Count (1), */ 0x81, 0x03, /* Input (Constant, Variable), */ 0x75, 0x10, /* Report Size (16), */ 0x95, 0x01, /* Report Count (1), */ 0xA4, /* Push, */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x65, 0x13, /* Unit (Inch), */ 0x55, 0xFD, /* Unit Exponent (-3), */ 0x34, /* Physical Minimum (0), */ 0x09, 0x30, /* Usage (X), */ 0x27, UCLOGIC_RDESC_PEN_PH(X_LM), /* Logical Maximum (PLACEHOLDER), */ 0x47, UCLOGIC_RDESC_PEN_PH(X_PM), /* Physical Maximum (PLACEHOLDER), */ 0x81, 0x02, /* Input (Variable), */ 0x09, 0x31, /* Usage (Y), */ 0x27, UCLOGIC_RDESC_PEN_PH(Y_LM), /* Logical Maximum (PLACEHOLDER), */ 0x47, UCLOGIC_RDESC_PEN_PH(Y_PM), /* Physical Maximum (PLACEHOLDER), */ 0x81, 0x02, /* Input (Variable), */ 0xB4, /* Pop, */ 0x09, 0x30, /* Usage (Tip Pressure), */ 0x27, UCLOGIC_RDESC_PEN_PH(PRESSURE_LM), /* Logical Maximum (PLACEHOLDER), */ 0x81, 0x02, /* Input (Variable), */ 0xC0, /* End Collection, */ 0xC0 /* End Collection */ }; const size_t uclogic_rdesc_v1_pen_template_size = sizeof(uclogic_rdesc_v1_pen_template_arr); /* Fixed report descriptor template for (tweaked) v2 pen reports */ const __u8 uclogic_rdesc_v2_pen_template_arr[] = { 0x05, 0x0D, /* Usage Page (Digitizer), */ 0x09, 0x01, /* Usage (Digitizer), */ 0xA1, 0x01, /* Collection (Application), */ 0x85, 0x08, /* Report ID (8), */ 0x09, 0x20, /* Usage (Stylus), */ 0xA0, /* Collection (Physical), */ 0x14, /* Logical Minimum (0), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x75, 0x01, /* Report Size (1), */ 0x09, 0x42, /* Usage (Tip Switch), */ 0x09, 0x44, /* Usage (Barrel Switch), */ 0x09, 0x46, /* Usage (Tablet Pick), */ 0x95, 0x03, /* Report Count (3), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x03, /* Report Count (3), */ 0x81, 0x03, /* Input (Constant, Variable), */ 0x09, 0x32, /* Usage (In Range), */ 0x95, 0x01, /* Report Count (1), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x01, /* Report Count (1), */ 0x81, 0x03, /* Input (Constant, Variable), */ 0x95, 0x01, /* Report Count (1), */ 0xA4, /* Push, */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x65, 0x13, /* Unit (Inch), */ 0x55, 0xFD, /* Unit Exponent (-3), */ 0x75, 0x18, /* Report Size (24), */ 0x34, /* Physical Minimum (0), */ 0x09, 0x30, /* Usage (X), */ 0x27, UCLOGIC_RDESC_PEN_PH(X_LM), /* Logical Maximum (PLACEHOLDER), */ 0x47, UCLOGIC_RDESC_PEN_PH(X_PM), /* Physical Maximum (PLACEHOLDER), */ 0x81, 0x02, /* Input (Variable), */ 0x09, 0x31, /* Usage (Y), */ 0x27, UCLOGIC_RDESC_PEN_PH(Y_LM), /* Logical Maximum (PLACEHOLDER), */ 0x47, UCLOGIC_RDESC_PEN_PH(Y_PM), /* Physical Maximum (PLACEHOLDER), */ 0x81, 0x02, /* Input (Variable), */ 0xB4, /* Pop, */ 0x09, 0x30, /* Usage (Tip Pressure), */ 0x75, 0x10, /* Report Size (16), */ 0x27, UCLOGIC_RDESC_PEN_PH(PRESSURE_LM), /* Logical Maximum (PLACEHOLDER), */ 0x81, 0x02, /* Input (Variable), */ 0x54, /* Unit Exponent (0), */ 0x65, 0x14, /* Unit (Degrees), */ 0x35, 0xC4, /* Physical Minimum (-60), */ 0x45, 0x3C, /* Physical Maximum (60), */ 0x15, 0xC4, /* Logical Minimum (-60), */ 0x25, 0x3C, /* Logical Maximum (60), */ 0x75, 0x08, /* Report Size (8), */ 0x95, 0x02, /* Report Count (2), */ 0x09, 0x3D, /* Usage (X Tilt), */ 0x09, 0x3E, /* Usage (Y Tilt), */ 0x81, 0x02, /* Input (Variable), */ 0xC0, /* End Collection, */ 0xC0 /* End Collection */ }; const size_t uclogic_rdesc_v2_pen_template_size = sizeof(uclogic_rdesc_v2_pen_template_arr); /* * Expand to the contents of a generic frame buttons report descriptor. * * @_id: The report ID to use. * @_size: Size of the report to pad to, including report ID, bytes. */ #define UCLOGIC_RDESC_FRAME_BUTTONS_BYTES(_id, _size) \ 0x05, 0x01, /* Usage Page (Desktop), */ \ 0x09, 0x07, /* Usage (Keypad), */ \ 0xA1, 0x01, /* Collection (Application), */ \ 0x85, (_id), /* Report ID (_id), */ \ 0x14, /* Logical Minimum (0), */ \ 0x25, 0x01, /* Logical Maximum (1), */ \ 0x75, 0x01, /* Report Size (1), */ \ 0x05, 0x0D, /* Usage Page (Digitizer), */ \ 0x09, 0x39, /* Usage (Tablet Function Keys), */ \ 0xA0, /* Collection (Physical), */ \ 0x09, 0x44, /* Usage (Barrel Switch), */ \ 0x95, 0x01, /* Report Count (1), */ \ 0x81, 0x02, /* Input (Variable), */ \ 0x05, 0x01, /* Usage Page (Desktop), */ \ 0x09, 0x30, /* Usage (X), */ \ 0x09, 0x31, /* Usage (Y), */ \ 0x95, 0x02, /* Report Count (2), */ \ 0x81, 0x02, /* Input (Variable), */ \ 0x95, 0x15, /* Report Count (21), */ \ 0x81, 0x01, /* Input (Constant), */ \ 0x05, 0x09, /* Usage Page (Button), */ \ 0x19, 0x01, /* Usage Minimum (01h), */ \ 0x29, 0x0A, /* Usage Maximum (0Ah), */ \ 0x95, 0x0A, /* Report Count (10), */ \ 0x81, 0x02, /* Input (Variable), */ \ 0xC0, /* End Collection, */ \ 0x05, 0x01, /* Usage Page (Desktop), */ \ 0x09, 0x05, /* Usage (Gamepad), */ \ 0xA0, /* Collection (Physical), */ \ 0x05, 0x09, /* Usage Page (Button), */ \ 0x19, 0x01, /* Usage Minimum (01h), */ \ 0x29, 0x0A, /* Usage Maximum (0Ah), */ \ 0x95, 0x0A, /* Report Count (10), */ \ 0x81, 0x02, /* Input (Variable), */ \ 0x95, ((_size) * 8 - 52), \ /* Report Count (padding), */ \ 0x81, 0x01, /* Input (Constant), */ \ 0xC0, /* End Collection, */ \ 0xC0 /* End Collection */ /* Fixed report descriptor for (tweaked) v1 frame reports */ const __u8 uclogic_rdesc_v1_frame_arr[] = { UCLOGIC_RDESC_FRAME_BUTTONS_BYTES(UCLOGIC_RDESC_V1_FRAME_ID, 8) }; const size_t uclogic_rdesc_v1_frame_size = sizeof(uclogic_rdesc_v1_frame_arr); /* Fixed report descriptor for (tweaked) v2 frame button reports */ const __u8 uclogic_rdesc_v2_frame_buttons_arr[] = { UCLOGIC_RDESC_FRAME_BUTTONS_BYTES(UCLOGIC_RDESC_V2_FRAME_BUTTONS_ID, 12) }; const size_t uclogic_rdesc_v2_frame_buttons_size = sizeof(uclogic_rdesc_v2_frame_buttons_arr); /* Fixed report descriptor for (tweaked) v2 frame touch ring reports */ const __u8 uclogic_rdesc_v2_frame_touch_ring_arr[] = { 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x07, /* Usage (Keypad), */ 0xA1, 0x01, /* Collection (Application), */ 0x85, UCLOGIC_RDESC_V2_FRAME_TOUCH_ID, /* Report ID (TOUCH_ID), */ 0x14, /* Logical Minimum (0), */ 0x05, 0x0D, /* Usage Page (Digitizer), */ 0x09, 0x39, /* Usage (Tablet Function Keys), */ 0xA0, /* Collection (Physical), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x75, 0x01, /* Report Size (1), */ 0x05, 0x09, /* Usage Page (Button), */ 0x09, 0x01, /* Usage (01h), */ 0x95, 0x01, /* Report Count (1), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x07, /* Report Count (7), */ 0x81, 0x01, /* Input (Constant), */ 0x75, 0x08, /* Report Size (8), */ 0x95, 0x02, /* Report Count (2), */ 0x81, 0x01, /* Input (Constant), */ 0x05, 0x0D, /* Usage Page (Digitizer), */ 0x0A, 0xFF, 0xFF, /* Usage (FFFFh), */ 0x26, 0xFF, 0x00, /* Logical Maximum (255), */ 0x95, 0x01, /* Report Count (1), */ 0x81, 0x02, /* Input (Variable), */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x38, /* Usage (Wheel), */ 0x95, 0x01, /* Report Count (1), */ 0x15, 0x00, /* Logical Minimum (0), */ 0x25, 0x0B, /* Logical Maximum (11), */ 0x81, 0x02, /* Input (Variable), */ 0x09, 0x30, /* Usage (X), */ 0x09, 0x31, /* Usage (Y), */ 0x14, /* Logical Minimum (0), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x75, 0x01, /* Report Size (1), */ 0x95, 0x02, /* Report Count (2), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x2E, /* Report Count (46), */ 0x81, 0x01, /* Input (Constant), */ 0xC0, /* End Collection, */ 0xC0 /* End Collection */ }; const size_t uclogic_rdesc_v2_frame_touch_ring_size = sizeof(uclogic_rdesc_v2_frame_touch_ring_arr); /* Fixed report descriptor for (tweaked) v2 frame touch strip reports */ const __u8 uclogic_rdesc_v2_frame_touch_strip_arr[] = { 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x07, /* Usage (Keypad), */ 0xA1, 0x01, /* Collection (Application), */ 0x85, UCLOGIC_RDESC_V2_FRAME_TOUCH_ID, /* Report ID (TOUCH_ID), */ 0x14, /* Logical Minimum (0), */ 0x05, 0x0D, /* Usage Page (Digitizer), */ 0x09, 0x39, /* Usage (Tablet Function Keys), */ 0xA0, /* Collection (Physical), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x75, 0x01, /* Report Size (1), */ 0x05, 0x09, /* Usage Page (Button), */ 0x09, 0x01, /* Usage (01h), */ 0x95, 0x01, /* Report Count (1), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x07, /* Report Count (7), */ 0x81, 0x01, /* Input (Constant), */ 0x75, 0x08, /* Report Size (8), */ 0x95, 0x02, /* Report Count (2), */ 0x81, 0x01, /* Input (Constant), */ 0x05, 0x0D, /* Usage Page (Digitizer), */ 0x0A, 0xFF, 0xFF, /* Usage (FFFFh), */ 0x26, 0xFF, 0x00, /* Logical Maximum (255), */ 0x95, 0x01, /* Report Count (1), */ 0x81, 0x02, /* Input (Variable), */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x33, /* Usage (Rx), */ 0x09, 0x34, /* Usage (Ry), */ 0x95, 0x01, /* Report Count (1), */ 0x15, 0x00, /* Logical Minimum (0), */ 0x25, 0x07, /* Logical Maximum (7), */ 0x81, 0x02, /* Input (Variable), */ 0x09, 0x30, /* Usage (X), */ 0x09, 0x31, /* Usage (Y), */ 0x14, /* Logical Minimum (0), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x75, 0x01, /* Report Size (1), */ 0x95, 0x02, /* Report Count (2), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x2E, /* Report Count (46), */ 0x81, 0x01, /* Input (Constant), */ 0xC0, /* End Collection, */ 0xC0 /* End Collection */ }; const size_t uclogic_rdesc_v2_frame_touch_strip_size = sizeof(uclogic_rdesc_v2_frame_touch_strip_arr); /* Fixed report descriptor for (tweaked) v2 frame dial reports */ const __u8 uclogic_rdesc_v2_frame_dial_arr[] = { 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x07, /* Usage (Keypad), */ 0xA1, 0x01, /* Collection (Application), */ 0x85, UCLOGIC_RDESC_V2_FRAME_DIAL_ID, /* Report ID (DIAL_ID), */ 0x14, /* Logical Minimum (0), */ 0x05, 0x0D, /* Usage Page (Digitizer), */ 0x09, 0x39, /* Usage (Tablet Function Keys), */ 0xA0, /* Collection (Physical), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x75, 0x01, /* Report Size (1), */ 0x95, 0x01, /* Report Count (1), */ 0x81, 0x01, /* Input (Constant), */ 0x05, 0x09, /* Usage Page (Button), */ 0x09, 0x01, /* Usage (01h), */ 0x95, 0x01, /* Report Count (1), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x06, /* Report Count (6), */ 0x81, 0x01, /* Input (Constant), */ 0x75, 0x08, /* Report Size (8), */ 0x95, 0x02, /* Report Count (2), */ 0x81, 0x01, /* Input (Constant), */ 0x05, 0x0D, /* Usage Page (Digitizer), */ 0x0A, 0xFF, 0xFF, /* Usage (FFFFh), */ 0x26, 0xFF, 0x00, /* Logical Maximum (255), */ 0x95, 0x01, /* Report Count (1), */ 0x81, 0x02, /* Input (Variable), */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x38, /* Usage (Wheel), */ 0x95, 0x01, /* Report Count (1), */ 0x15, 0xFF, /* Logical Minimum (-1), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x81, 0x06, /* Input (Variable, Relative), */ 0x09, 0x30, /* Usage (X), */ 0x09, 0x31, /* Usage (Y), */ 0x14, /* Logical Minimum (0), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x75, 0x01, /* Report Size (1), */ 0x95, 0x02, /* Report Count (2), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x2E, /* Report Count (46), */ 0x81, 0x01, /* Input (Constant), */ 0xC0, /* End Collection, */ 0xC0 /* End Collection */ }; const size_t uclogic_rdesc_v2_frame_dial_size = sizeof(uclogic_rdesc_v2_frame_dial_arr); const __u8 uclogic_ugee_v2_probe_arr[] = { 0x02, 0xb0, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; const size_t uclogic_ugee_v2_probe_size = sizeof(uclogic_ugee_v2_probe_arr); const int uclogic_ugee_v2_probe_endpoint = 0x03; /* Fixed report descriptor template for UGEE v2 pen reports */ const __u8 uclogic_rdesc_ugee_v2_pen_template_arr[] = { 0x05, 0x0d, /* Usage Page (Digitizers), */ 0x09, 0x01, /* Usage (Digitizer), */ 0xa1, 0x01, /* Collection (Application), */ 0x85, 0x02, /* Report ID (2), */ 0x09, 0x20, /* Usage (Stylus), */ 0xa1, 0x00, /* Collection (Physical), */ 0x09, 0x42, /* Usage (Tip Switch), */ 0x09, 0x44, /* Usage (Barrel Switch), */ 0x09, 0x46, /* Usage (Tablet Pick), */ 0x75, 0x01, /* Report Size (1), */ 0x95, 0x03, /* Report Count (3), */ 0x14, /* Logical Minimum (0), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x02, /* Report Count (2), */ 0x81, 0x03, /* Input (Constant, Variable), */ 0x09, 0x32, /* Usage (In Range), */ 0x95, 0x01, /* Report Count (1), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x02, /* Report Count (2), */ 0x81, 0x03, /* Input (Constant, Variable), */ 0x75, 0x10, /* Report Size (16), */ 0x95, 0x01, /* Report Count (1), */ 0x35, 0x00, /* Physical Minimum (0), */ 0xa4, /* Push, */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x30, /* Usage (X), */ 0x65, 0x13, /* Unit (Inch), */ 0x55, 0x0d, /* Unit Exponent (-3), */ 0x27, UCLOGIC_RDESC_PEN_PH(X_LM), /* Logical Maximum (PLACEHOLDER), */ 0x47, UCLOGIC_RDESC_PEN_PH(X_PM), /* Physical Maximum (PLACEHOLDER), */ 0x81, 0x02, /* Input (Variable), */ 0x09, 0x31, /* Usage (Y), */ 0x27, UCLOGIC_RDESC_PEN_PH(Y_LM), /* Logical Maximum (PLACEHOLDER), */ 0x47, UCLOGIC_RDESC_PEN_PH(Y_PM), /* Physical Maximum (PLACEHOLDER), */ 0x81, 0x02, /* Input (Variable), */ 0xb4, /* Pop, */ 0x09, 0x30, /* Usage (Tip Pressure), */ 0x45, 0x00, /* Physical Maximum (0), */ 0x27, UCLOGIC_RDESC_PEN_PH(PRESSURE_LM), /* Logical Maximum (PLACEHOLDER), */ 0x75, 0x0D, /* Report Size (13), */ 0x95, 0x01, /* Report Count (1), */ 0x81, 0x02, /* Input (Variable), */ 0x75, 0x01, /* Report Size (1), */ 0x95, 0x03, /* Report Count (3), */ 0x81, 0x01, /* Input (Constant), */ 0x09, 0x3d, /* Usage (X Tilt), */ 0x35, 0xC3, /* Physical Minimum (-61), */ 0x45, 0x3C, /* Physical Maximum (60), */ 0x15, 0xC3, /* Logical Minimum (-61), */ 0x25, 0x3C, /* Logical Maximum (60), */ 0x75, 0x08, /* Report Size (8), */ 0x95, 0x01, /* Report Count (1), */ 0x81, 0x02, /* Input (Variable), */ 0x09, 0x3e, /* Usage (Y Tilt), */ 0x35, 0xC3, /* Physical Minimum (-61), */ 0x45, 0x3C, /* Physical Maximum (60), */ 0x15, 0xC3, /* Logical Minimum (-61), */ 0x25, 0x3C, /* Logical Maximum (60), */ 0x81, 0x02, /* Input (Variable), */ 0xc0, /* End Collection, */ 0xc0, /* End Collection */ }; const size_t uclogic_rdesc_ugee_v2_pen_template_size = sizeof(uclogic_rdesc_ugee_v2_pen_template_arr); /* Fixed report descriptor template for UGEE v2 frame reports (buttons only) */ const __u8 uclogic_rdesc_ugee_v2_frame_btn_template_arr[] = { 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x07, /* Usage (Keypad), */ 0xA1, 0x01, /* Collection (Application), */ 0x85, UCLOGIC_RDESC_V1_FRAME_ID, /* Report ID, */ 0x05, 0x0D, /* Usage Page (Digitizer), */ 0x09, 0x39, /* Usage (Tablet Function Keys), */ 0xA0, /* Collection (Physical), */ 0x75, 0x01, /* Report Size (1), */ 0x95, 0x08, /* Report Count (8), */ 0x81, 0x01, /* Input (Constant), */ 0x05, 0x09, /* Usage Page (Button), */ 0x19, 0x01, /* Usage Minimum (01h), */ UCLOGIC_RDESC_FRAME_PH_BTN, /* Usage Maximum (PLACEHOLDER), */ 0x95, 0x0A, /* Report Count (10), */ 0x14, /* Logical Minimum (0), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x46, /* Report Count (70), */ 0x81, 0x01, /* Input (Constant), */ 0xC0, /* End Collection, */ 0xC0 /* End Collection */ }; const size_t uclogic_rdesc_ugee_v2_frame_btn_template_size = sizeof(uclogic_rdesc_ugee_v2_frame_btn_template_arr); /* Fixed report descriptor template for UGEE v2 frame reports (dial) */ const __u8 uclogic_rdesc_ugee_v2_frame_dial_template_arr[] = { 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x07, /* Usage (Keypad), */ 0xA1, 0x01, /* Collection (Application), */ 0x85, UCLOGIC_RDESC_V1_FRAME_ID, /* Report ID, */ 0x05, 0x0D, /* Usage Page (Digitizer), */ 0x09, 0x39, /* Usage (Tablet Function Keys), */ 0xA0, /* Collection (Physical), */ 0x75, 0x01, /* Report Size (1), */ 0x95, 0x08, /* Report Count (8), */ 0x81, 0x01, /* Input (Constant), */ 0x05, 0x09, /* Usage Page (Button), */ 0x19, 0x01, /* Usage Minimum (01h), */ UCLOGIC_RDESC_FRAME_PH_BTN, /* Usage Maximum (PLACEHOLDER), */ 0x95, 0x0A, /* Report Count (10), */ 0x14, /* Logical Minimum (0), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x06, /* Report Count (6), */ 0x81, 0x01, /* Input (Constant), */ 0x75, 0x08, /* Report Size (8), */ 0x95, 0x03, /* Report Count (3), */ 0x81, 0x01, /* Input (Constant), */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x38, /* Usage (Wheel), */ 0x95, 0x01, /* Report Count (1), */ 0x15, 0xFF, /* Logical Minimum (-1), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x81, 0x06, /* Input (Variable, Relative), */ 0x95, 0x02, /* Report Count (2), */ 0x81, 0x01, /* Input (Constant), */ 0xC0, /* End Collection, */ 0xC0 /* End Collection */ }; const size_t uclogic_rdesc_ugee_v2_frame_dial_template_size = sizeof(uclogic_rdesc_ugee_v2_frame_dial_template_arr); /* Fixed report descriptor template for UGEE v2 frame reports (mouse) */ const __u8 uclogic_rdesc_ugee_v2_frame_mouse_template_arr[] = { 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x02, /* Usage (Mouse), */ 0xA1, 0x01, /* Collection (Application), */ 0x85, 0x01, /* Report ID (1), */ 0x05, 0x01, /* Usage Page (Pointer), */ 0xA0, /* Collection (Physical), */ 0x75, 0x01, /* Report Size (1), */ 0x95, 0x02, /* Report Count (2), */ 0x05, 0x09, /* Usage Page (Button), */ 0x19, 0x01, /* Usage Minimum (01h), */ 0x29, 0x02, /* Usage Maximum (02h), */ 0x14, /* Logical Minimum (0), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x06, /* Report Count (6), */ 0x81, 0x01, /* Input (Constant), */ 0x05, 0x01, /* Usage Page (Generic Desktop), */ 0x09, 0x30, /* Usage (X), */ 0x09, 0x31, /* Usage (Y), */ 0x75, 0x10, /* Report Size (16), */ 0x95, 0x02, /* Report Count (2), */ 0x16, 0x00, 0x80, /* Logical Minimum (-32768), */ 0x26, 0xFF, 0x7F, /* Logical Maximum (32767), */ 0x81, 0x06, /* Input (Variable, Relative), */ 0x95, 0x01, /* Report Count (1), */ 0x81, 0x01, /* Input (Constant), */ 0xC0, /* End Collection, */ 0xC0 /* End Collection */ }; const size_t uclogic_rdesc_ugee_v2_frame_mouse_template_size = sizeof(uclogic_rdesc_ugee_v2_frame_mouse_template_arr); /* Fixed report descriptor template for UGEE v2 battery reports */ const __u8 uclogic_rdesc_ugee_v2_battery_template_arr[] = { 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x07, /* Usage (Keypad), */ 0xA1, 0x01, /* Collection (Application), */ 0x85, UCLOGIC_RDESC_UGEE_V2_BATTERY_ID, /* Report ID, */ 0x75, 0x08, /* Report Size (8), */ 0x95, 0x02, /* Report Count (2), */ 0x81, 0x01, /* Input (Constant), */ 0x05, 0x84, /* Usage Page (Power Device), */ 0x05, 0x85, /* Usage Page (Battery System), */ 0x09, 0x65, /* Usage Page (AbsoluteStateOfCharge), */ 0x75, 0x08, /* Report Size (8), */ 0x95, 0x01, /* Report Count (1), */ 0x15, 0x00, /* Logical Minimum (0), */ 0x26, 0xff, 0x00, /* Logical Maximum (255), */ 0x81, 0x02, /* Input (Variable), */ 0x75, 0x01, /* Report Size (1), */ 0x95, 0x01, /* Report Count (1), */ 0x15, 0x00, /* Logical Minimum (0), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x09, 0x44, /* Usage Page (Charging), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x07, /* Report Count (7), */ 0x81, 0x01, /* Input (Constant), */ 0x75, 0x08, /* Report Size (8), */ 0x95, 0x07, /* Report Count (7), */ 0x81, 0x01, /* Input (Constant), */ 0xC0 /* End Collection */ }; const size_t uclogic_rdesc_ugee_v2_battery_template_size = sizeof(uclogic_rdesc_ugee_v2_battery_template_arr); /* Fixed report descriptor for Ugee EX07 frame */ const __u8 uclogic_rdesc_ugee_ex07_frame_arr[] = { 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x07, /* Usage (Keypad), */ 0xA1, 0x01, /* Collection (Application), */ 0x85, 0x06, /* Report ID (6), */ 0x05, 0x0D, /* Usage Page (Digitizer), */ 0x09, 0x39, /* Usage (Tablet Function Keys), */ 0xA0, /* Collection (Physical), */ 0x05, 0x09, /* Usage Page (Button), */ 0x75, 0x01, /* Report Size (1), */ 0x19, 0x03, /* Usage Minimum (03h), */ 0x29, 0x06, /* Usage Maximum (06h), */ 0x95, 0x04, /* Report Count (4), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x1A, /* Report Count (26), */ 0x81, 0x03, /* Input (Constant, Variable), */ 0x19, 0x01, /* Usage Minimum (01h), */ 0x29, 0x02, /* Usage Maximum (02h), */ 0x95, 0x02, /* Report Count (2), */ 0x81, 0x02, /* Input (Variable), */ 0xC0, /* End Collection, */ 0xC0 /* End Collection */ }; const size_t uclogic_rdesc_ugee_ex07_frame_size = sizeof(uclogic_rdesc_ugee_ex07_frame_arr); /* Fixed report descriptor for Ugee G5 frame controls */ const __u8 uclogic_rdesc_ugee_g5_frame_arr[] = { 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x07, /* Usage (Keypad), */ 0xA1, 0x01, /* Collection (Application), */ 0x85, 0x06, /* Report ID (6), */ 0x05, 0x0D, /* Usage Page (Digitizer), */ 0x09, 0x39, /* Usage (Tablet Function Keys), */ 0xA0, /* Collection (Physical), */ 0x14, /* Logical Minimum (0), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x05, 0x09, /* Usage Page (Button), */ 0x19, 0x01, /* Usage Minimum (01h), */ 0x29, 0x05, /* Usage Maximum (05h), */ 0x75, 0x01, /* Report Size (1), */ 0x95, 0x05, /* Report Count (5), */ 0x81, 0x02, /* Input (Variable), */ 0x75, 0x01, /* Report Size (1), */ 0x95, 0x03, /* Report Count (3), */ 0x81, 0x01, /* Input (Constant), */ 0x05, 0x0D, /* Usage Page (Digitizer), */ 0x0A, 0xFF, 0xFF, /* Usage (FFFFh), */ 0x26, 0xFF, 0x00, /* Logical Maximum (255), */ 0x75, 0x08, /* Report Size (8), */ 0x95, 0x01, /* Report Count (1), */ 0x81, 0x02, /* Input (Variable), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x09, 0x44, /* Usage (Barrel Switch), */ 0x75, 0x01, /* Report Size (1), */ 0x95, 0x01, /* Report Count (1), */ 0x81, 0x02, /* Input (Variable), */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x30, /* Usage (X), */ 0x09, 0x31, /* Usage (Y), */ 0x75, 0x01, /* Report Size (1), */ 0x95, 0x02, /* Report Count (2), */ 0x81, 0x02, /* Input (Variable), */ 0x75, 0x01, /* Report Size (1), */ 0x95, 0x0B, /* Report Count (11), */ 0x81, 0x01, /* Input (Constant), */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x38, /* Usage (Wheel), */ 0x15, 0xFF, /* Logical Minimum (-1), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x75, 0x02, /* Report Size (2), */ 0x95, 0x01, /* Report Count (1), */ 0x81, 0x06, /* Input (Variable, Relative), */ 0xC0, /* End Collection, */ 0xC0 /* End Collection */ }; const size_t uclogic_rdesc_ugee_g5_frame_size = sizeof(uclogic_rdesc_ugee_g5_frame_arr); /* Fixed report descriptor for XP-Pen Deco 01 frame controls */ const __u8 uclogic_rdesc_xppen_deco01_frame_arr[] = { 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x07, /* Usage (Keypad), */ 0xA1, 0x01, /* Collection (Application), */ 0x85, 0x06, /* Report ID (6), */ 0x14, /* Logical Minimum (0), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x75, 0x01, /* Report Size (1), */ 0x05, 0x0D, /* Usage Page (Digitizer), */ 0x09, 0x39, /* Usage (Tablet Function Keys), */ 0xA0, /* Collection (Physical), */ 0x05, 0x09, /* Usage Page (Button), */ 0x19, 0x01, /* Usage Minimum (01h), */ 0x29, 0x08, /* Usage Maximum (08h), */ 0x95, 0x08, /* Report Count (8), */ 0x81, 0x02, /* Input (Variable), */ 0x05, 0x0D, /* Usage Page (Digitizer), */ 0x09, 0x44, /* Usage (Barrel Switch), */ 0x95, 0x01, /* Report Count (1), */ 0x81, 0x02, /* Input (Variable), */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x30, /* Usage (X), */ 0x09, 0x31, /* Usage (Y), */ 0x95, 0x02, /* Report Count (2), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x15, /* Report Count (21), */ 0x81, 0x01, /* Input (Constant), */ 0xC0, /* End Collection, */ 0xC0 /* End Collection */ }; const size_t uclogic_rdesc_xppen_deco01_frame_size = sizeof(uclogic_rdesc_xppen_deco01_frame_arr); /* Fixed report descriptor for XP-Pen Arist 22R Pro frame */ const __u8 uclogic_rdesc_xppen_artist_22r_pro_frame_arr[] = { 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x07, /* Usage (Keypad), */ 0xA1, 0x01, /* Collection (Application), */ 0x85, UCLOGIC_RDESC_V1_FRAME_ID, /* Report ID (Virtual report), */ 0x05, 0x0D, /* Usage Page (Digitizer), */ 0x09, 0x39, /* Usage (Tablet Function Keys), */ 0xA0, /* Collection (Physical), */ 0x14, /* Logical Minimum (0), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x75, 0x01, /* Report Size (1), */ 0x95, 0x08, /* Report Count (8), */ 0x81, 0x01, /* Input (Constant), */ 0x05, 0x09, /* Usage Page (Button), */ 0x19, 0x01, /* Usage Minimum (01h), */ 0x29, 0x14, /* Usage Maximum (14h), */ 0x95, 0x14, /* Report Count (20), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x14, /* Report Count (20), */ 0x81, 0x01, /* Input (Constant), */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x38, /* Usage (Wheel), */ 0x75, 0x08, /* Report Size (8), */ 0x95, 0x01, /* Report Count (1), */ 0x15, 0xFF, /* Logical Minimum (-1), */ 0x25, 0x08, /* Logical Maximum (8), */ 0x81, 0x06, /* Input (Variable, Relative), */ 0x05, 0x0C, /* Usage Page (Consumer Devices), */ 0x0A, 0x38, 0x02, /* Usage (AC PAN), */ 0x95, 0x01, /* Report Count (1), */ 0x81, 0x06, /* Input (Variable, Relative), */ 0x26, 0xFF, 0x00, /* Logical Maximum (255), */ 0x75, 0x08, /* Report Size (8), */ 0x95, 0x01, /* Report Count (1), */ 0x81, 0x02, /* Input (Variable), */ 0xC0, /* End Collection */ 0xC0, /* End Collection */ }; const size_t uclogic_rdesc_xppen_artist_22r_pro_frame_size = sizeof(uclogic_rdesc_xppen_artist_22r_pro_frame_arr); /* Fixed report descriptor template for XP-PEN 24 Pro reports * Mostly identical to uclogic_rdesc_ugee_v2_pen_template_arr except that the X coordinate has to be * 32-bits instead of 16-bits. */ const __u8 uclogic_rdesc_xppen_artist_24_pro_pen_template_arr[] = { 0x05, 0x0d, /* Usage Page (Digitizers), */ 0x09, 0x01, /* Usage (Digitizer), */ 0xa1, 0x01, /* Collection (Application), */ 0x85, 0x02, /* Report ID (2), */ 0x09, 0x20, /* Usage (Stylus), */ 0xa1, 0x00, /* Collection (Physical), */ 0x09, 0x42, /* Usage (Tip Switch), */ 0x09, 0x44, /* Usage (Barrel Switch), */ 0x09, 0x46, /* Usage (Tablet Pick), */ 0x75, 0x01, /* Report Size (1), */ 0x95, 0x03, /* Report Count (3), */ 0x14, /* Logical Minimum (0), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x02, /* Report Count (2), */ 0x81, 0x03, /* Input (Constant, Variable), */ 0x09, 0x32, /* Usage (In Range), */ 0x95, 0x01, /* Report Count (1), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x02, /* Report Count (2), */ 0x81, 0x03, /* Input (Constant, Variable), */ 0x75, 0x10, /* Report Size (16), */ 0x95, 0x01, /* Report Count (1), */ 0x35, 0x00, /* Physical Minimum (0), */ 0xa4, /* Push, */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x30, /* Usage (X), */ 0x65, 0x13, /* Unit (Inch), */ 0x55, 0x0d, /* Unit Exponent (-3), */ 0x27, UCLOGIC_RDESC_PEN_PH(X_LM), /* Logical Maximum (PLACEHOLDER), */ 0x47, UCLOGIC_RDESC_PEN_PH(X_PM), /* Physical Maximum (PLACEHOLDER), */ 0x75, 0x20, /* Report Size (32), */ 0x81, 0x02, /* Input (Variable), */ 0x75, 0x10, /* Report Size (16), */ 0x09, 0x31, /* Usage (Y), */ 0x27, UCLOGIC_RDESC_PEN_PH(Y_LM), /* Logical Maximum (PLACEHOLDER), */ 0x47, UCLOGIC_RDESC_PEN_PH(Y_PM), /* Physical Maximum (PLACEHOLDER), */ 0x81, 0x02, /* Input (Variable), */ 0xb4, /* Pop, */ 0x09, 0x30, /* Usage (Tip Pressure), */ 0x45, 0x00, /* Physical Maximum (0), */ 0x27, UCLOGIC_RDESC_PEN_PH(PRESSURE_LM), /* Logical Maximum (PLACEHOLDER), */ 0x75, 0x0D, /* Report Size (13), */ 0x95, 0x01, /* Report Count (1), */ 0x81, 0x02, /* Input (Variable), */ 0x75, 0x01, /* Report Size (1), */ 0x95, 0x03, /* Report Count (3), */ 0x81, 0x01, /* Input (Constant), */ 0x09, 0x3d, /* Usage (X Tilt), */ 0x35, 0xC3, /* Physical Minimum (-61), */ 0x45, 0x3C, /* Physical Maximum (60), */ 0x15, 0xC3, /* Logical Minimum (-61), */ 0x25, 0x3C, /* Logical Maximum (60), */ 0x75, 0x08, /* Report Size (8), */ 0x95, 0x01, /* Report Count (1), */ 0x81, 0x02, /* Input (Variable), */ 0x09, 0x3e, /* Usage (Y Tilt), */ 0x35, 0xC3, /* Physical Minimum (-61), */ 0x45, 0x3C, /* Physical Maximum (60), */ 0x15, 0xC3, /* Logical Minimum (-61), */ 0x25, 0x3C, /* Logical Maximum (60), */ 0x81, 0x02, /* Input (Variable), */ 0xc0, /* End Collection, */ 0xc0, /* End Collection */ }; const size_t uclogic_rdesc_xppen_artist_24_pro_pen_template_size = sizeof(uclogic_rdesc_xppen_artist_24_pro_pen_template_arr); /* Fixed report descriptor for XP-Pen Arist 24 Pro frame */ const __u8 uclogic_rdesc_xppen_artist_24_pro_frame_arr[] = { 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x07, /* Usage (Keypad), */ 0xA1, 0x01, /* Collection (Application), */ 0x85, UCLOGIC_RDESC_V1_FRAME_ID, /* Report ID (Virtual report), */ 0x05, 0x0D, /* Usage Page (Digitizer), */ 0x09, 0x39, /* Usage (Tablet Function Keys), */ 0xA0, /* Collection (Physical), */ 0x14, /* Logical Minimum (0), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x75, 0x01, /* Report Size (1), */ 0x95, 0x08, /* Report Count (8), */ 0x81, 0x01, /* Input (Constant), */ 0x05, 0x09, /* Usage Page (Button), */ 0x19, 0x01, /* Usage Minimum (01h), */ 0x29, 0x14, /* Usage Maximum (14h), */ 0x95, 0x14, /* Report Count (20), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x14, /* Report Count (20), */ 0x81, 0x01, /* Input (Constant), */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x38, /* Usage (Wheel), */ 0x75, 0x08, /* Report Size (8), */ 0x95, 0x01, /* Report Count (1), */ 0x15, 0xFF, /* Logical Minimum (-1), */ 0x25, 0x08, /* Logical Maximum (8), */ 0x81, 0x06, /* Input (Variable, Relative), */ 0x05, 0x0C, /* Usage Page (Consumer Devices), */ 0x0A, 0x38, 0x02, /* Usage (AC PAN), */ 0x95, 0x01, /* Report Count (1), */ 0x81, 0x06, /* Input (Variable, Relative), */ 0x26, 0xFF, 0x00, /* Logical Maximum (255), */ 0x75, 0x08, /* Report Size (8), */ 0x95, 0x01, /* Report Count (1), */ 0x81, 0x02, /* Input (Variable), */ 0x75, 0x01, /* Report Size (1), */ 0x95, 16, /* Report Count (16), */ 0x81, 0x01, /* Input (Constant), */ 0xC0, /* End Collection */ 0xC0, /* End Collection */ }; const size_t uclogic_rdesc_xppen_artist_24_pro_frame_size = sizeof(uclogic_rdesc_xppen_artist_24_pro_frame_arr); /** * uclogic_rdesc_template_apply() - apply report descriptor parameters to a * report descriptor template, creating a report descriptor. Copies the * template over to the new report descriptor and replaces every occurrence of * the template placeholders, followed by an index byte, with the value from the * parameter list at that index. * * @template_ptr: Pointer to the template buffer. * @template_size: Size of the template buffer. * @param_list: List of template parameters. * @param_num: Number of parameters in the list. * * Returns: * Kmalloc-allocated pointer to the created report descriptor, * or NULL if allocation failed. */ __u8 *uclogic_rdesc_template_apply(const __u8 *template_ptr, size_t template_size, const s32 *param_list, size_t param_num) { static const __u8 btn_head[] = {UCLOGIC_RDESC_FRAME_PH_BTN_HEAD}; static const __u8 pen_head[] = {UCLOGIC_RDESC_PEN_PH_HEAD}; __u8 *rdesc_ptr; __u8 *p; s32 v; rdesc_ptr = kmemdup(template_ptr, template_size, GFP_KERNEL); if (rdesc_ptr == NULL) return NULL; for (p = rdesc_ptr; p + sizeof(btn_head) < rdesc_ptr + template_size;) { if (p + sizeof(pen_head) < rdesc_ptr + template_size && memcmp(p, pen_head, sizeof(pen_head)) == 0 && p[sizeof(pen_head)] < param_num) { v = param_list[p[sizeof(pen_head)]]; put_unaligned((__force u32)cpu_to_le32(v), (s32 *)p); p += sizeof(pen_head) + 1; } else if (memcmp(p, btn_head, sizeof(btn_head)) == 0 && p[sizeof(btn_head)] < param_num) { v = param_list[p[sizeof(btn_head)]]; put_unaligned((__u8)0x2A, p); /* Usage Maximum */ put_unaligned((__force u16)cpu_to_le16(v), (s16 *)(p + 1)); p += sizeof(btn_head) + 1; } else { p++; } } return rdesc_ptr; } EXPORT_SYMBOL_IF_KUNIT(uclogic_rdesc_template_apply); |
| 1 1 1 1 1 1 1 1 1 1 1 1 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 | // SPDX-License-Identifier: GPL-2.0-only /* * Hauppauge HD PVR USB driver * * Copyright (C) 2008 Janne Grunau (j@jannau.net) * * IR device registration code is * Copyright (C) 2010 Andy Walls <awalls@md.metrocast.net> */ #if IS_ENABLED(CONFIG_I2C) #include <linux/i2c.h> #include <linux/slab.h> #include <linux/export.h> #include "hdpvr.h" #define CTRL_READ_REQUEST 0xb8 #define CTRL_WRITE_REQUEST 0x38 #define REQTYPE_I2C_READ 0xb1 #define REQTYPE_I2C_WRITE 0xb0 #define REQTYPE_I2C_WRITE_STATT 0xd0 #define Z8F0811_IR_TX_I2C_ADDR 0x70 #define Z8F0811_IR_RX_I2C_ADDR 0x71 struct i2c_client *hdpvr_register_ir_i2c(struct hdpvr_device *dev) { struct IR_i2c_init_data *init_data = &dev->ir_i2c_init_data; struct i2c_board_info info = { I2C_BOARD_INFO("ir_z8f0811_hdpvr", Z8F0811_IR_RX_I2C_ADDR), }; /* Our default information for ir-kbd-i2c.c to use */ init_data->ir_codes = RC_MAP_HAUPPAUGE; init_data->internal_get_key_func = IR_KBD_GET_KEY_HAUP_XVR; init_data->type = RC_PROTO_BIT_RC5 | RC_PROTO_BIT_RC6_MCE | RC_PROTO_BIT_RC6_6A_32; init_data->name = "HD-PVR"; init_data->polling_interval = 405; /* ms, duplicated from Windows */ info.platform_data = init_data; return i2c_new_client_device(&dev->i2c_adapter, &info); } static int hdpvr_i2c_read(struct hdpvr_device *dev, int bus, unsigned char addr, char *wdata, int wlen, char *data, int len) { int ret; if ((len > sizeof(dev->i2c_buf)) || (wlen > sizeof(dev->i2c_buf))) return -EINVAL; if (wlen) { memcpy(dev->i2c_buf, wdata, wlen); ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), REQTYPE_I2C_WRITE, CTRL_WRITE_REQUEST, (bus << 8) | addr, 0, dev->i2c_buf, wlen, 1000); if (ret < 0) return ret; } ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), REQTYPE_I2C_READ, CTRL_READ_REQUEST, (bus << 8) | addr, 0, dev->i2c_buf, len, 1000); if (ret == len) { memcpy(data, dev->i2c_buf, len); ret = 0; } else if (ret >= 0) ret = -EIO; return ret; } static int hdpvr_i2c_write(struct hdpvr_device *dev, int bus, unsigned char addr, char *data, int len) { int ret; if (len > sizeof(dev->i2c_buf)) return -EINVAL; memcpy(dev->i2c_buf, data, len); ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), REQTYPE_I2C_WRITE, CTRL_WRITE_REQUEST, (bus << 8) | addr, 0, dev->i2c_buf, len, 1000); if (ret < 0) return ret; ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), REQTYPE_I2C_WRITE_STATT, CTRL_READ_REQUEST, 0, 0, dev->i2c_buf, 2, 1000); if ((ret == 2) && (dev->i2c_buf[1] == (len - 1))) ret = 0; else if (ret >= 0) ret = -EIO; return ret; } static int hdpvr_transfer(struct i2c_adapter *i2c_adapter, struct i2c_msg *msgs, int num) { struct hdpvr_device *dev = i2c_get_adapdata(i2c_adapter); int retval = 0, addr; mutex_lock(&dev->i2c_mutex); addr = msgs[0].addr << 1; if (num == 1) { if (msgs[0].flags & I2C_M_RD) retval = hdpvr_i2c_read(dev, 1, addr, NULL, 0, msgs[0].buf, msgs[0].len); else retval = hdpvr_i2c_write(dev, 1, addr, msgs[0].buf, msgs[0].len); } else { /* do write-then-read */ retval = hdpvr_i2c_read(dev, 1, addr, msgs[0].buf, msgs[0].len, msgs[1].buf, msgs[1].len); } mutex_unlock(&dev->i2c_mutex); return retval ? retval : num; } static u32 hdpvr_functionality(struct i2c_adapter *adapter) { return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; } static const struct i2c_algorithm hdpvr_algo = { .master_xfer = hdpvr_transfer, .functionality = hdpvr_functionality, }; /* prevent invalid 0-length usb_control_msg and support only write-then-read */ static const struct i2c_adapter_quirks hdpvr_quirks = { .flags = I2C_AQ_NO_ZERO_LEN_READ | I2C_AQ_COMB_WRITE_THEN_READ, }; static const struct i2c_adapter hdpvr_i2c_adapter_template = { .name = "Hauppauge HD PVR I2C", .owner = THIS_MODULE, .algo = &hdpvr_algo, .quirks = &hdpvr_quirks, }; static int hdpvr_activate_ir(struct hdpvr_device *dev) { char buffer[2]; mutex_lock(&dev->i2c_mutex); hdpvr_i2c_read(dev, 0, 0x54, NULL, 0, buffer, 1); buffer[0] = 0; buffer[1] = 0x8; hdpvr_i2c_write(dev, 1, 0x54, buffer, 2); buffer[1] = 0x18; hdpvr_i2c_write(dev, 1, 0x54, buffer, 2); mutex_unlock(&dev->i2c_mutex); return 0; } int hdpvr_register_i2c_adapter(struct hdpvr_device *dev) { hdpvr_activate_ir(dev); dev->i2c_adapter = hdpvr_i2c_adapter_template; dev->i2c_adapter.dev.parent = &dev->udev->dev; i2c_set_adapdata(&dev->i2c_adapter, dev); return i2c_add_adapter(&dev->i2c_adapter); } #endif |
| 83 83 83 33 33 33 70 70 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 | // SPDX-License-Identifier: GPL-2.0 #include <linux/proc_fs.h> #include <linux/ethtool.h> #include <linux/export.h> #include <net/net_namespace.h> #include <net/netns/generic.h> #include <net/bonding.h> #include "bonding_priv.h" static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos) __acquires(RCU) { struct bonding *bond = pde_data(file_inode(seq->file)); struct list_head *iter; struct slave *slave; loff_t off = 0; rcu_read_lock(); if (*pos == 0) return SEQ_START_TOKEN; bond_for_each_slave_rcu(bond, slave, iter) if (++off == *pos) return slave; return NULL; } static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos) { struct bonding *bond = pde_data(file_inode(seq->file)); struct list_head *iter; struct slave *slave; bool found = false; ++*pos; if (v == SEQ_START_TOKEN) return bond_first_slave_rcu(bond); bond_for_each_slave_rcu(bond, slave, iter) { if (found) return slave; if (slave == v) found = true; } return NULL; } static void bond_info_seq_stop(struct seq_file *seq, void *v) __releases(RCU) { rcu_read_unlock(); } static void bond_info_show_master(struct seq_file *seq) { struct bonding *bond = pde_data(file_inode(seq->file)); const struct bond_opt_value *optval; struct slave *curr, *primary; int i; curr = rcu_dereference(bond->curr_active_slave); seq_printf(seq, "Bonding Mode: %s", bond_mode_name(BOND_MODE(bond))); if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP && bond->params.fail_over_mac) { optval = bond_opt_get_val(BOND_OPT_FAIL_OVER_MAC, bond->params.fail_over_mac); seq_printf(seq, " (fail_over_mac %s)", optval->string); } seq_printf(seq, "\n"); if (bond_mode_uses_xmit_hash(bond)) { optval = bond_opt_get_val(BOND_OPT_XMIT_HASH, bond->params.xmit_policy); seq_printf(seq, "Transmit Hash Policy: %s (%d)\n", optval->string, bond->params.xmit_policy); } if (bond_uses_primary(bond)) { primary = rcu_dereference(bond->primary_slave); seq_printf(seq, "Primary Slave: %s", primary ? primary->dev->name : "None"); if (primary) { optval = bond_opt_get_val(BOND_OPT_PRIMARY_RESELECT, bond->params.primary_reselect); seq_printf(seq, " (primary_reselect %s)", optval->string); } seq_printf(seq, "\nCurrently Active Slave: %s\n", (curr) ? curr->dev->name : "None"); } seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ? "up" : "down"); seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon); seq_printf(seq, "Up Delay (ms): %d\n", bond->params.updelay * bond->params.miimon); seq_printf(seq, "Down Delay (ms): %d\n", bond->params.downdelay * bond->params.miimon); seq_printf(seq, "Peer Notification Delay (ms): %d\n", bond->params.peer_notif_delay * bond->params.miimon); /* ARP information */ if (bond->params.arp_interval > 0) { int printed = 0; seq_printf(seq, "ARP Polling Interval (ms): %d\n", bond->params.arp_interval); seq_printf(seq, "ARP Missed Max: %u\n", bond->params.missed_max); seq_printf(seq, "ARP IP target/s (n.n.n.n form):"); for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) { if (!bond->params.arp_targets[i]) break; if (printed) seq_printf(seq, ","); seq_printf(seq, " %pI4", &bond->params.arp_targets[i]); printed = 1; } seq_printf(seq, "\n"); #if IS_ENABLED(CONFIG_IPV6) printed = 0; seq_printf(seq, "NS IPv6 target/s (xx::xx form):"); for (i = 0; (i < BOND_MAX_NS_TARGETS); i++) { if (ipv6_addr_any(&bond->params.ns_targets[i])) break; if (printed) seq_printf(seq, ","); seq_printf(seq, " %pI6c", &bond->params.ns_targets[i]); printed = 1; } seq_printf(seq, "\n"); #endif } if (BOND_MODE(bond) == BOND_MODE_8023AD) { struct ad_info ad_info; seq_puts(seq, "\n802.3ad info\n"); seq_printf(seq, "LACP active: %s\n", (bond->params.lacp_active) ? "on" : "off"); seq_printf(seq, "LACP rate: %s\n", (bond->params.lacp_fast) ? "fast" : "slow"); seq_printf(seq, "Min links: %d\n", bond->params.min_links); optval = bond_opt_get_val(BOND_OPT_AD_SELECT, bond->params.ad_select); seq_printf(seq, "Aggregator selection policy (ad_select): %s\n", optval->string); if (capable(CAP_NET_ADMIN)) { seq_printf(seq, "System priority: %d\n", BOND_AD_INFO(bond).system.sys_priority); seq_printf(seq, "System MAC address: %pM\n", &BOND_AD_INFO(bond).system.sys_mac_addr); if (__bond_3ad_get_active_agg_info(bond, &ad_info)) { seq_printf(seq, "bond %s has no active aggregator\n", bond->dev->name); } else { seq_printf(seq, "Active Aggregator Info:\n"); seq_printf(seq, "\tAggregator ID: %d\n", ad_info.aggregator_id); seq_printf(seq, "\tNumber of ports: %d\n", ad_info.ports); seq_printf(seq, "\tActor Key: %d\n", ad_info.actor_key); seq_printf(seq, "\tPartner Key: %d\n", ad_info.partner_key); seq_printf(seq, "\tPartner Mac Address: %pM\n", ad_info.partner_system); } } } } static void bond_info_show_slave(struct seq_file *seq, const struct slave *slave) { struct bonding *bond = pde_data(file_inode(seq->file)); seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name); seq_printf(seq, "MII Status: %s\n", bond_slave_link_status(slave->link)); if (slave->speed == SPEED_UNKNOWN) seq_printf(seq, "Speed: %s\n", "Unknown"); else seq_printf(seq, "Speed: %d Mbps\n", slave->speed); if (slave->duplex == DUPLEX_UNKNOWN) seq_printf(seq, "Duplex: %s\n", "Unknown"); else seq_printf(seq, "Duplex: %s\n", slave->duplex ? "full" : "half"); seq_printf(seq, "Link Failure Count: %u\n", slave->link_failure_count); seq_printf(seq, "Permanent HW addr: %*phC\n", slave->dev->addr_len, slave->perm_hwaddr); seq_printf(seq, "Slave queue ID: %d\n", READ_ONCE(slave->queue_id)); if (BOND_MODE(bond) == BOND_MODE_8023AD) { const struct port *port = &SLAVE_AD_INFO(slave)->port; const struct aggregator *agg = port->aggregator; if (agg) { seq_printf(seq, "Aggregator ID: %d\n", agg->aggregator_identifier); seq_printf(seq, "Actor Churn State: %s\n", bond_3ad_churn_desc(port->sm_churn_actor_state)); seq_printf(seq, "Partner Churn State: %s\n", bond_3ad_churn_desc(port->sm_churn_partner_state)); seq_printf(seq, "Actor Churned Count: %d\n", port->churn_actor_count); seq_printf(seq, "Partner Churned Count: %d\n", port->churn_partner_count); if (capable(CAP_NET_ADMIN)) { seq_puts(seq, "details actor lacp pdu:\n"); seq_printf(seq, " system priority: %d\n", port->actor_system_priority); seq_printf(seq, " system mac address: %pM\n", &port->actor_system); seq_printf(seq, " port key: %d\n", port->actor_oper_port_key); seq_printf(seq, " port priority: %d\n", port->actor_port_priority); seq_printf(seq, " port number: %d\n", port->actor_port_number); seq_printf(seq, " port state: %d\n", port->actor_oper_port_state); seq_puts(seq, "details partner lacp pdu:\n"); seq_printf(seq, " system priority: %d\n", port->partner_oper.system_priority); seq_printf(seq, " system mac address: %pM\n", &port->partner_oper.system); seq_printf(seq, " oper key: %d\n", port->partner_oper.key); seq_printf(seq, " port priority: %d\n", port->partner_oper.port_priority); seq_printf(seq, " port number: %d\n", port->partner_oper.port_number); seq_printf(seq, " port state: %d\n", port->partner_oper.port_state); } } else { seq_puts(seq, "Aggregator ID: N/A\n"); } } } static int bond_info_seq_show(struct seq_file *seq, void *v) { if (v == SEQ_START_TOKEN) { seq_printf(seq, "%s\n", bond_version); bond_info_show_master(seq); } else bond_info_show_slave(seq, v); return 0; } static const struct seq_operations bond_info_seq_ops = { .start = bond_info_seq_start, .next = bond_info_seq_next, .stop = bond_info_seq_stop, .show = bond_info_seq_show, }; void bond_create_proc_entry(struct bonding *bond) { struct net_device *bond_dev = bond->dev; struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); if (bn->proc_dir) { bond->proc_entry = proc_create_seq_data(bond_dev->name, 0444, bn->proc_dir, &bond_info_seq_ops, bond); if (bond->proc_entry == NULL) netdev_warn(bond_dev, "Cannot create /proc/net/%s/%s\n", DRV_NAME, bond_dev->name); else memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ); } } void bond_remove_proc_entry(struct bonding *bond) { struct net_device *bond_dev = bond->dev; struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); if (bn->proc_dir && bond->proc_entry) { remove_proc_entry(bond->proc_file_name, bn->proc_dir); memset(bond->proc_file_name, 0, IFNAMSIZ); bond->proc_entry = NULL; } } /* Create the bonding directory under /proc/net, if doesn't exist yet. * Caller must hold rtnl_lock. */ void __net_init bond_create_proc_dir(struct bond_net *bn) { if (!bn->proc_dir) { bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net); if (!bn->proc_dir) pr_warn("Warning: Cannot create /proc/net/%s\n", DRV_NAME); } } /* Destroy the bonding directory under /proc/net, if empty. */ void __net_exit bond_destroy_proc_dir(struct bond_net *bn) { if (bn->proc_dir) { remove_proc_entry(DRV_NAME, bn->net->proc_net); bn->proc_dir = NULL; } } |
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2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 | // SPDX-License-Identifier: GPL-2.0-or-later /* * SPCA501 chip based cameras initialization data * * V4L2 by Jean-Francois Moine <http://moinejf.free.fr> */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #define MODULE_NAME "spca501" #include "gspca.h" MODULE_AUTHOR("Michel Xhaard <mxhaard@users.sourceforge.net>"); MODULE_DESCRIPTION("GSPCA/SPCA501 USB Camera Driver"); MODULE_LICENSE("GPL"); /* specific webcam descriptor */ struct sd { struct gspca_dev gspca_dev; /* !! must be the first item */ unsigned short contrast; __u8 brightness; __u8 colors; __u8 blue_balance; __u8 red_balance; char subtype; #define Arowana300KCMOSCamera 0 #define IntelCreateAndShare 1 #define KodakDVC325 2 #define MystFromOriUnknownCamera 3 #define SmileIntlCamera 4 #define ThreeComHomeConnectLite 5 #define ViewQuestM318B 6 }; static const struct v4l2_pix_format vga_mode[] = { {160, 120, V4L2_PIX_FMT_SPCA501, V4L2_FIELD_NONE, .bytesperline = 160, .sizeimage = 160 * 120 * 3 / 2, .colorspace = V4L2_COLORSPACE_SRGB, .priv = 2}, {320, 240, V4L2_PIX_FMT_SPCA501, V4L2_FIELD_NONE, .bytesperline = 320, .sizeimage = 320 * 240 * 3 / 2, .colorspace = V4L2_COLORSPACE_SRGB, .priv = 1}, {640, 480, V4L2_PIX_FMT_SPCA501, V4L2_FIELD_NONE, .bytesperline = 640, .sizeimage = 640 * 480 * 3 / 2, .colorspace = V4L2_COLORSPACE_SRGB, .priv = 0}, }; #define SPCA50X_REG_USB 0x2 /* spca505 501 */ /* * Data to initialize a SPCA501. From a capture file provided by Bill Roehl * With SPCA501 chip description */ #define CCDSP_SET /* set CCDSP parameters */ #define TG_SET /* set time generator set */ #undef DSPWIN_SET /* set DSP windows parameters */ #undef ALTER_GAMA /* Set alternate set to YUV transform coeffs. */ #define SPCA501_SNAPBIT 0x80 #define SPCA501_SNAPCTRL 0x10 /* Frame packet header offsets for the spca501 */ #define SPCA501_OFFSET_GPIO 1 #define SPCA501_OFFSET_TYPE 2 #define SPCA501_OFFSET_TURN3A 3 #define SPCA501_OFFSET_FRAMSEQ 4 #define SPCA501_OFFSET_COMPRESS 5 #define SPCA501_OFFSET_QUANT 6 #define SPCA501_OFFSET_QUANT2 7 #define SPCA501_OFFSET_DATA 8 #define SPCA501_PROP_COMP_ENABLE(d) ((d) & 1) #define SPCA501_PROP_SNAP(d) ((d) & 0x40) #define SPCA501_PROP_SNAP_CTRL(d) ((d) & 0x10) #define SPCA501_PROP_COMP_THRESH(d) (((d) & 0x0e) >> 1) #define SPCA501_PROP_COMP_QUANT(d) (((d) & 0x70) >> 4) /* SPCA501 CCDSP control */ #define SPCA501_REG_CCDSP 0x01 /* SPCA501 control/status registers */ #define SPCA501_REG_CTLRL 0x02 /* registers for color correction and YUV transformation */ #define SPCA501_A11 0x08 #define SPCA501_A12 0x09 #define SPCA501_A13 0x0A #define SPCA501_A21 0x0B #define SPCA501_A22 0x0C #define SPCA501_A23 0x0D #define SPCA501_A31 0x0E #define SPCA501_A32 0x0F #define SPCA501_A33 0x10 /* Data for video camera initialization before capturing */ static const __u16 spca501_open_data[][3] = { /* bmRequest,value,index */ {0x2, 0x50, 0x00}, /* C/S enable soft reset */ {0x2, 0x40, 0x00}, /* C/S disable soft reset */ {0x2, 0x02, 0x05}, /* C/S general purpose I/O data */ {0x2, 0x03, 0x05}, /* C/S general purpose I/O data */ #ifdef CCDSP_SET {0x1, 0x38, 0x01}, /* CCDSP options */ {0x1, 0x05, 0x02}, /* CCDSP Optical black level for user settings */ {0x1, 0xC0, 0x03}, /* CCDSP Optical black settings */ {0x1, 0x67, 0x07}, {0x1, 0x63, 0x3f}, /* CCDSP CCD gamma enable */ {0x1, 0x03, 0x56}, /* Add gamma correction */ {0x1, 0xFF, 0x15}, /* CCDSP High luminance for white balance */ {0x1, 0x01, 0x16}, /* CCDSP Low luminance for white balance */ /* Color correction and RGB-to-YUV transformation coefficients changing */ #ifdef ALTER_GAMA {0x0, 0x00, 0x08}, /* A11 */ {0x0, 0x00, 0x09}, /* A12 */ {0x0, 0x90, 0x0A}, /* A13 */ {0x0, 0x12, 0x0B}, /* A21 */ {0x0, 0x00, 0x0C}, /* A22 */ {0x0, 0x00, 0x0D}, /* A23 */ {0x0, 0x00, 0x0E}, /* A31 */ {0x0, 0x02, 0x0F}, /* A32 */ {0x0, 0x00, 0x10}, /* A33 */ #else {0x1, 0x2a, 0x08}, /* A11 0x31 */ {0x1, 0xf8, 0x09}, /* A12 f8 */ {0x1, 0xf8, 0x0A}, /* A13 f8 */ {0x1, 0xf8, 0x0B}, /* A21 f8 */ {0x1, 0x14, 0x0C}, /* A22 0x14 */ {0x1, 0xf8, 0x0D}, /* A23 f8 */ {0x1, 0xf8, 0x0E}, /* A31 f8 */ {0x1, 0xf8, 0x0F}, /* A32 f8 */ {0x1, 0x20, 0x10}, /* A33 0x20 */ #endif {0x1, 0x00, 0x11}, /* R offset */ {0x1, 0x00, 0x12}, /* G offset */ {0x1, 0x00, 0x13}, /* B offset */ {0x1, 0x00, 0x14}, /* GB offset */ #endif #ifdef TG_SET /* Time generator manipulations */ {0x0, 0xfc, 0x0}, /* Set up high bits of shutter speed */ {0x0, 0x01, 0x1}, /* Set up low bits of shutter speed */ {0x0, 0xe4, 0x04}, /* DCLK*2 clock phase adjustment */ {0x0, 0x08, 0x05}, /* ADCK phase adjustment, inv. ext. VB */ {0x0, 0x03, 0x06}, /* FR phase adjustment */ {0x0, 0x01, 0x07}, /* FCDS phase adjustment */ {0x0, 0x39, 0x08}, /* FS phase adjustment */ {0x0, 0x88, 0x0a}, /* FH1 phase and delay adjustment */ {0x0, 0x03, 0x0f}, /* pixel identification */ {0x0, 0x00, 0x11}, /* clock source selection (default) */ /*VERY strange manipulations with * select DMCLP or OBPX to be ADCLP output (0x0C) * OPB always toggle or not (0x0D) but they allow * us to set up brightness */ {0x0, 0x01, 0x0c}, {0x0, 0xe0, 0x0d}, /* Done */ #endif #ifdef DSPWIN_SET {0x1, 0xa0, 0x01}, /* Setting image processing parameters */ {0x1, 0x1c, 0x17}, /* Changing Windows positions X1 */ {0x1, 0xe2, 0x19}, /* X2 */ {0x1, 0x1c, 0x1b}, /* X3 */ {0x1, 0xe2, 0x1d}, /* X4 */ {0x1, 0x5f, 0x1f}, /* X5 */ {0x1, 0x32, 0x20}, /* Y5 */ {0x1, 0x01, 0x10}, /* Changing A33 */ #endif {0x2, 0x204a, 0x07},/* Setting video compression & resolution 160x120 */ {0x2, 0x94, 0x06}, /* Setting video no compression */ {} }; /* The SPCAxxx docs from Sunplus document these values in tables, one table per register number. In the data below, dmRequest is the register number, index is the Addr, and value is a combination of Bit values. Bit Value (hex) 0 01 1 02 2 04 3 08 4 10 5 20 6 40 7 80 */ /* Data for chip initialization (set default values) */ static const __u16 spca501_init_data[][3] = { /* Set all the values to powerup defaults */ /* bmRequest,value,index */ {0x0, 0xAA, 0x00}, {0x0, 0x02, 0x01}, {0x0, 0x01, 0x02}, {0x0, 0x02, 0x03}, {0x0, 0xCE, 0x04}, {0x0, 0x00, 0x05}, {0x0, 0x00, 0x06}, {0x0, 0x00, 0x07}, {0x0, 0x00, 0x08}, {0x0, 0x00, 0x09}, {0x0, 0x90, 0x0A}, {0x0, 0x12, 0x0B}, {0x0, 0x00, 0x0C}, {0x0, 0x00, 0x0D}, {0x0, 0x00, 0x0E}, {0x0, 0x02, 0x0F}, {0x0, 0x00, 0x10}, {0x0, 0x00, 0x11}, {0x0, 0x00, 0x12}, {0x0, 0x00, 0x13}, {0x0, 0x00, 0x14}, {0x0, 0x00, 0x15}, {0x0, 0x00, 0x16}, {0x0, 0x00, 0x17}, {0x0, 0x00, 0x18}, {0x0, 0x00, 0x19}, {0x0, 0x00, 0x1A}, {0x0, 0x00, 0x1B}, {0x0, 0x00, 0x1C}, {0x0, 0x00, 0x1D}, {0x0, 0x00, 0x1E}, {0x0, 0x00, 0x1F}, {0x0, 0x00, 0x20}, {0x0, 0x00, 0x21}, {0x0, 0x00, 0x22}, {0x0, 0x00, 0x23}, {0x0, 0x00, 0x24}, {0x0, 0x00, 0x25}, {0x0, 0x00, 0x26}, {0x0, 0x00, 0x27}, {0x0, 0x00, 0x28}, {0x0, 0x00, 0x29}, {0x0, 0x00, 0x2A}, {0x0, 0x00, 0x2B}, {0x0, 0x00, 0x2C}, {0x0, 0x00, 0x2D}, {0x0, 0x00, 0x2E}, {0x0, 0x00, 0x2F}, {0x0, 0x00, 0x30}, {0x0, 0x00, 0x31}, {0x0, 0x00, 0x32}, {0x0, 0x00, 0x33}, {0x0, 0x00, 0x34}, {0x0, 0x00, 0x35}, {0x0, 0x00, 0x36}, {0x0, 0x00, 0x37}, {0x0, 0x00, 0x38}, {0x0, 0x00, 0x39}, {0x0, 0x00, 0x3A}, {0x0, 0x00, 0x3B}, {0x0, 0x00, 0x3C}, {0x0, 0x00, 0x3D}, {0x0, 0x00, 0x3E}, {0x0, 0x00, 0x3F}, {0x0, 0x00, 0x40}, {0x0, 0x00, 0x41}, {0x0, 0x00, 0x42}, {0x0, 0x00, 0x43}, {0x0, 0x00, 0x44}, {0x0, 0x00, 0x45}, {0x0, 0x00, 0x46}, {0x0, 0x00, 0x47}, {0x0, 0x00, 0x48}, {0x0, 0x00, 0x49}, {0x0, 0x00, 0x4A}, {0x0, 0x00, 0x4B}, {0x0, 0x00, 0x4C}, {0x0, 0x00, 0x4D}, {0x0, 0x00, 0x4E}, {0x0, 0x00, 0x4F}, {0x0, 0x00, 0x50}, {0x0, 0x00, 0x51}, {0x0, 0x00, 0x52}, {0x0, 0x00, 0x53}, {0x0, 0x00, 0x54}, {0x0, 0x00, 0x55}, {0x0, 0x00, 0x56}, {0x0, 0x00, 0x57}, {0x0, 0x00, 0x58}, {0x0, 0x00, 0x59}, {0x0, 0x00, 0x5A}, {0x0, 0x00, 0x5B}, {0x0, 0x00, 0x5C}, {0x0, 0x00, 0x5D}, {0x0, 0x00, 0x5E}, {0x0, 0x00, 0x5F}, {0x0, 0x00, 0x60}, {0x0, 0x00, 0x61}, {0x0, 0x00, 0x62}, {0x0, 0x00, 0x63}, {0x0, 0x00, 0x64}, {0x0, 0x00, 0x65}, {0x0, 0x00, 0x66}, {0x0, 0x00, 0x67}, {0x0, 0x00, 0x68}, {0x0, 0x00, 0x69}, {0x0, 0x00, 0x6A}, {0x0, 0x00, 0x6B}, {0x0, 0x00, 0x6C}, {0x0, 0x00, 0x6D}, {0x0, 0x00, 0x6E}, {0x0, 0x00, 0x6F}, {0x0, 0x00, 0x70}, {0x0, 0x00, 0x71}, {0x0, 0x00, 0x72}, {0x0, 0x00, 0x73}, {0x0, 0x00, 0x74}, {0x0, 0x00, 0x75}, {0x0, 0x00, 0x76}, {0x0, 0x00, 0x77}, {0x0, 0x00, 0x78}, {0x0, 0x00, 0x79}, {0x0, 0x00, 0x7A}, {0x0, 0x00, 0x7B}, {0x0, 0x00, 0x7C}, {0x0, 0x00, 0x7D}, {0x0, 0x00, 0x7E}, {0x0, 0x00, 0x7F}, {0x0, 0x00, 0x80}, {0x0, 0x00, 0x81}, {0x0, 0x00, 0x82}, {0x0, 0x00, 0x83}, {0x0, 0x00, 0x84}, {0x0, 0x00, 0x85}, {0x0, 0x00, 0x86}, {0x0, 0x00, 0x87}, {0x0, 0x00, 0x88}, {0x0, 0x00, 0x89}, {0x0, 0x00, 0x8A}, {0x0, 0x00, 0x8B}, {0x0, 0x00, 0x8C}, {0x0, 0x00, 0x8D}, {0x0, 0x00, 0x8E}, {0x0, 0x00, 0x8F}, {0x0, 0x00, 0x90}, {0x0, 0x00, 0x91}, {0x0, 0x00, 0x92}, {0x0, 0x00, 0x93}, {0x0, 0x00, 0x94}, {0x0, 0x00, 0x95}, {0x0, 0x00, 0x96}, {0x0, 0x00, 0x97}, {0x0, 0x00, 0x98}, {0x0, 0x00, 0x99}, {0x0, 0x00, 0x9A}, {0x0, 0x00, 0x9B}, {0x0, 0x00, 0x9C}, {0x0, 0x00, 0x9D}, {0x0, 0x00, 0x9E}, {0x0, 0x00, 0x9F}, {0x0, 0x00, 0xA0}, {0x0, 0x00, 0xA1}, {0x0, 0x00, 0xA2}, {0x0, 0x00, 0xA3}, {0x0, 0x00, 0xA4}, {0x0, 0x00, 0xA5}, {0x0, 0x00, 0xA6}, {0x0, 0x00, 0xA7}, {0x0, 0x00, 0xA8}, {0x0, 0x00, 0xA9}, {0x0, 0x00, 0xAA}, {0x0, 0x00, 0xAB}, {0x0, 0x00, 0xAC}, {0x0, 0x00, 0xAD}, {0x0, 0x00, 0xAE}, {0x0, 0x00, 0xAF}, {0x0, 0x00, 0xB0}, {0x0, 0x00, 0xB1}, {0x0, 0x00, 0xB2}, {0x0, 0x00, 0xB3}, {0x0, 0x00, 0xB4}, {0x0, 0x00, 0xB5}, {0x0, 0x00, 0xB6}, {0x0, 0x00, 0xB7}, {0x0, 0x00, 0xB8}, {0x0, 0x00, 0xB9}, {0x0, 0x00, 0xBA}, {0x0, 0x00, 0xBB}, {0x0, 0x00, 0xBC}, {0x0, 0x00, 0xBD}, {0x0, 0x00, 0xBE}, {0x0, 0x00, 0xBF}, {0x0, 0x00, 0xC0}, {0x0, 0x00, 0xC1}, {0x0, 0x00, 0xC2}, {0x0, 0x00, 0xC3}, {0x0, 0x00, 0xC4}, {0x0, 0x00, 0xC5}, {0x0, 0x00, 0xC6}, {0x0, 0x00, 0xC7}, {0x0, 0x00, 0xC8}, {0x0, 0x00, 0xC9}, {0x0, 0x00, 0xCA}, {0x0, 0x00, 0xCB}, {0x0, 0x00, 0xCC}, {0x1, 0xF4, 0x00}, {0x1, 0x38, 0x01}, {0x1, 0x40, 0x02}, {0x1, 0x0A, 0x03}, {0x1, 0x40, 0x04}, {0x1, 0x40, 0x05}, {0x1, 0x40, 0x06}, {0x1, 0x67, 0x07}, {0x1, 0x31, 0x08}, {0x1, 0x00, 0x09}, {0x1, 0x00, 0x0A}, {0x1, 0x00, 0x0B}, {0x1, 0x14, 0x0C}, {0x1, 0x00, 0x0D}, {0x1, 0x00, 0x0E}, {0x1, 0x00, 0x0F}, {0x1, 0x1E, 0x10}, {0x1, 0x00, 0x11}, {0x1, 0x00, 0x12}, {0x1, 0x00, 0x13}, {0x1, 0x00, 0x14}, {0x1, 0xFF, 0x15}, {0x1, 0x01, 0x16}, {0x1, 0x32, 0x17}, {0x1, 0x23, 0x18}, {0x1, 0xCE, 0x19}, {0x1, 0x23, 0x1A}, {0x1, 0x32, 0x1B}, {0x1, 0x8D, 0x1C}, {0x1, 0xCE, 0x1D}, {0x1, 0x8D, 0x1E}, {0x1, 0x00, 0x1F}, {0x1, 0x00, 0x20}, {0x1, 0xFF, 0x3E}, {0x1, 0x02, 0x3F}, {0x1, 0x00, 0x40}, {0x1, 0x00, 0x41}, {0x1, 0x00, 0x42}, {0x1, 0x00, 0x43}, {0x1, 0x00, 0x44}, {0x1, 0x00, 0x45}, {0x1, 0x00, 0x46}, {0x1, 0x00, 0x47}, {0x1, 0x00, 0x48}, {0x1, 0x00, 0x49}, {0x1, 0x00, 0x4A}, {0x1, 0x00, 0x4B}, {0x1, 0x00, 0x4C}, {0x1, 0x00, 0x4D}, {0x1, 0x00, 0x4E}, {0x1, 0x00, 0x4F}, {0x1, 0x00, 0x50}, {0x1, 0x00, 0x51}, {0x1, 0x00, 0x52}, {0x1, 0x00, 0x53}, {0x1, 0x00, 0x54}, {0x1, 0x00, 0x55}, {0x1, 0x00, 0x56}, {0x1, 0x00, 0x57}, {0x1, 0x00, 0x58}, {0x1, 0x00, 0x59}, {0x1, 0x00, 0x5A}, {0x2, 0x03, 0x00}, {0x2, 0x00, 0x01}, {0x2, 0x00, 0x05}, {0x2, 0x00, 0x06}, {0x2, 0x00, 0x07}, {0x2, 0x00, 0x10}, {0x2, 0x00, 0x11}, /* Strange - looks like the 501 driver doesn't do anything * at insert time except read the EEPROM */ {} }; /* Data for video camera init before capture. * Capture and decoding by Colin Peart. * This is for the 3com HomeConnect Lite which is spca501a based. */ static const __u16 spca501_3com_open_data[][3] = { /* bmRequest,value,index */ {0x2, 0x0050, 0x0000}, /* C/S Enable TG soft reset, timing mode=010 */ {0x2, 0x0043, 0x0000}, /* C/S Disable TG soft reset, timing mode=010 */ {0x2, 0x0002, 0x0005}, /* C/S GPIO */ {0x2, 0x0003, 0x0005}, /* C/S GPIO */ #ifdef CCDSP_SET {0x1, 0x0020, 0x0001}, /* CCDSP Options */ {0x1, 0x0020, 0x0002}, /* CCDSP Black Level */ {0x1, 0x006e, 0x0007}, /* CCDSP Gamma options */ {0x1, 0x0090, 0x0015}, /* CCDSP Luminance Low */ {0x1, 0x00ff, 0x0016}, /* CCDSP Luminance High */ {0x1, 0x0003, 0x003F}, /* CCDSP Gamma correction toggle */ #ifdef ALTER_GAMMA {0x1, 0x0010, 0x0008}, /* CCDSP YUV A11 */ {0x1, 0x0000, 0x0009}, /* CCDSP YUV A12 */ {0x1, 0x0000, 0x000a}, /* CCDSP YUV A13 */ {0x1, 0x0000, 0x000b}, /* CCDSP YUV A21 */ {0x1, 0x0010, 0x000c}, /* CCDSP YUV A22 */ {0x1, 0x0000, 0x000d}, /* CCDSP YUV A23 */ {0x1, 0x0000, 0x000e}, /* CCDSP YUV A31 */ {0x1, 0x0000, 0x000f}, /* CCDSP YUV A32 */ {0x1, 0x0010, 0x0010}, /* CCDSP YUV A33 */ {0x1, 0x0000, 0x0011}, /* CCDSP R Offset */ {0x1, 0x0000, 0x0012}, /* CCDSP G Offset */ {0x1, 0x0001, 0x0013}, /* CCDSP B Offset */ {0x1, 0x0001, 0x0014}, /* CCDSP BG Offset */ {0x1, 0x003f, 0x00C1}, /* CCDSP Gamma Correction Enable */ #endif #endif #ifdef TG_SET {0x0, 0x00fc, 0x0000}, /* TG Shutter Speed High Bits */ {0x0, 0x0000, 0x0001}, /* TG Shutter Speed Low Bits */ {0x0, 0x00e4, 0x0004}, /* TG DCLK*2 Adjust */ {0x0, 0x0008, 0x0005}, /* TG ADCK Adjust */ {0x0, 0x0003, 0x0006}, /* TG FR Phase Adjust */ {0x0, 0x0001, 0x0007}, /* TG FCDS Phase Adjust */ {0x0, 0x0039, 0x0008}, /* TG FS Phase Adjust */ {0x0, 0x0088, 0x000a}, /* TG MH1 */ {0x0, 0x0003, 0x000f}, /* TG Pixel ID */ /* Like below, unexplained toglleing */ {0x0, 0x0080, 0x000c}, {0x0, 0x0000, 0x000d}, {0x0, 0x0080, 0x000c}, {0x0, 0x0004, 0x000d}, {0x0, 0x0000, 0x000c}, {0x0, 0x0000, 0x000d}, {0x0, 0x0040, 0x000c}, {0x0, 0x0017, 0x000d}, {0x0, 0x00c0, 0x000c}, {0x0, 0x0000, 0x000d}, {0x0, 0x0080, 0x000c}, {0x0, 0x0006, 0x000d}, {0x0, 0x0080, 0x000c}, {0x0, 0x0004, 0x000d}, {0x0, 0x0002, 0x0003}, #endif #ifdef DSPWIN_SET {0x1, 0x001c, 0x0017}, /* CCDSP W1 Start X */ {0x1, 0x00e2, 0x0019}, /* CCDSP W2 Start X */ {0x1, 0x001c, 0x001b}, /* CCDSP W3 Start X */ {0x1, 0x00e2, 0x001d}, /* CCDSP W4 Start X */ {0x1, 0x00aa, 0x001f}, /* CCDSP W5 Start X */ {0x1, 0x0070, 0x0020}, /* CCDSP W5 Start Y */ #endif {0x0, 0x0001, 0x0010}, /* TG Start Clock */ /* {0x2, 0x006a, 0x0001}, * C/S Enable ISOSYNCH Packet Engine */ {0x2, 0x0068, 0x0001}, /* C/S Disable ISOSYNCH Packet Engine */ {0x2, 0x0000, 0x0005}, {0x2, 0x0043, 0x0000}, /* C/S Set Timing Mode, Disable TG soft reset */ {0x2, 0x0043, 0x0000}, /* C/S Set Timing Mode, Disable TG soft reset */ {0x2, 0x0002, 0x0005}, /* C/S GPIO */ {0x2, 0x0003, 0x0005}, /* C/S GPIO */ {0x2, 0x006a, 0x0001}, /* C/S Enable ISOSYNCH Packet Engine */ {} }; /* * Data used to initialize a SPCA501C with HV7131B sensor. * From a capture file taken with USBSnoop v 1.5 * I have a "SPCA501C pc camera chipset" manual by sunplus, but some * of the value meanings are obscure or simply "reserved". * to do list: * 1) Understand what every value means * 2) Understand why some values seem to appear more than once * 3) Write a small comment for each line of the following arrays. */ static const __u16 spca501c_arowana_open_data[][3] = { /* bmRequest,value,index */ {0x02, 0x0007, 0x0005}, {0x02, 0xa048, 0x0000}, {0x05, 0x0022, 0x0004}, {0x01, 0x0006, 0x0011}, {0x01, 0x00ff, 0x0012}, {0x01, 0x0014, 0x0013}, {0x01, 0x0000, 0x0014}, {0x01, 0x0042, 0x0051}, {0x01, 0x0040, 0x0052}, {0x01, 0x0051, 0x0053}, {0x01, 0x0040, 0x0054}, {0x01, 0x0000, 0x0055}, {0x00, 0x0025, 0x0000}, {0x00, 0x0026, 0x0000}, {0x00, 0x0001, 0x0000}, {0x00, 0x0027, 0x0000}, {0x00, 0x008a, 0x0000}, {} }; static const __u16 spca501c_arowana_init_data[][3] = { /* bmRequest,value,index */ {0x02, 0x0007, 0x0005}, {0x02, 0xa048, 0x0000}, {0x05, 0x0022, 0x0004}, {0x01, 0x0006, 0x0011}, {0x01, 0x00ff, 0x0012}, {0x01, 0x0014, 0x0013}, {0x01, 0x0000, 0x0014}, {0x01, 0x0042, 0x0051}, {0x01, 0x0040, 0x0052}, {0x01, 0x0051, 0x0053}, {0x01, 0x0040, 0x0054}, {0x01, 0x0000, 0x0055}, {0x00, 0x0025, 0x0000}, {0x00, 0x0026, 0x0000}, {0x00, 0x0001, 0x0000}, {0x00, 0x0027, 0x0000}, {0x00, 0x008a, 0x0000}, {0x02, 0x0000, 0x0005}, {0x02, 0x0007, 0x0005}, {0x02, 0x2000, 0x0000}, {0x05, 0x0022, 0x0004}, {0x05, 0x0015, 0x0001}, {0x05, 0x00ea, 0x0000}, {0x05, 0x0021, 0x0001}, {0x05, 0x00d2, 0x0000}, {0x05, 0x0023, 0x0001}, {0x05, 0x0003, 0x0000}, {0x05, 0x0030, 0x0001}, {0x05, 0x002b, 0x0000}, {0x05, 0x0031, 0x0001}, {0x05, 0x0023, 0x0000}, {0x05, 0x0032, 0x0001}, {0x05, 0x0023, 0x0000}, {0x05, 0x0033, 0x0001}, {0x05, 0x0023, 0x0000}, {0x05, 0x0034, 0x0001}, {0x05, 0x0002, 0x0000}, {0x05, 0x0050, 0x0001}, {0x05, 0x0000, 0x0000}, {0x05, 0x0051, 0x0001}, {0x05, 0x0000, 0x0000}, {0x05, 0x0052, 0x0001}, {0x05, 0x0000, 0x0000}, {0x05, 0x0054, 0x0001}, {0x05, 0x0001, 0x0000}, {0x00, 0x0000, 0x0001}, {0x00, 0x0000, 0x0002}, {0x00, 0x000c, 0x0003}, {0x00, 0x0000, 0x0004}, {0x00, 0x0090, 0x0005}, {0x00, 0x0000, 0x0006}, {0x00, 0x0040, 0x0007}, {0x00, 0x00c0, 0x0008}, {0x00, 0x004a, 0x0009}, {0x00, 0x0000, 0x000a}, {0x00, 0x0000, 0x000b}, {0x00, 0x0001, 0x000c}, {0x00, 0x0001, 0x000d}, {0x00, 0x0000, 0x000e}, {0x00, 0x0002, 0x000f}, {0x00, 0x0001, 0x0010}, {0x00, 0x0000, 0x0011}, {0x00, 0x0000, 0x0012}, {0x00, 0x0002, 0x0020}, {0x00, 0x0080, 0x0021}, {0x00, 0x0001, 0x0022}, {0x00, 0x00e0, 0x0023}, {0x00, 0x0000, 0x0024}, {0x00, 0x00d5, 0x0025}, {0x00, 0x0000, 0x0026}, {0x00, 0x000b, 0x0027}, {0x00, 0x0000, 0x0046}, {0x00, 0x0000, 0x0047}, {0x00, 0x0000, 0x0048}, {0x00, 0x0000, 0x0049}, {0x00, 0x0008, 0x004a}, {0xff, 0x0000, 0x00d0}, {0xff, 0x00d8, 0x00d1}, {0xff, 0x0000, 0x00d4}, {0xff, 0x0000, 0x00d5}, {0x01, 0x00a6, 0x0000}, {0x01, 0x0028, 0x0001}, {0x01, 0x0000, 0x0002}, {0x01, 0x000a, 0x0003}, {0x01, 0x0040, 0x0004}, {0x01, 0x0066, 0x0007}, {0x01, 0x0011, 0x0008}, {0x01, 0x0032, 0x0009}, {0x01, 0x00fd, 0x000a}, {0x01, 0x0038, 0x000b}, {0x01, 0x00d1, 0x000c}, {0x01, 0x00f7, 0x000d}, {0x01, 0x00ed, 0x000e}, {0x01, 0x00d8, 0x000f}, {0x01, 0x0038, 0x0010}, {0x01, 0x00ff, 0x0015}, {0x01, 0x0001, 0x0016}, {0x01, 0x0032, 0x0017}, {0x01, 0x0023, 0x0018}, {0x01, 0x00ce, 0x0019}, {0x01, 0x0023, 0x001a}, {0x01, 0x0032, 0x001b}, {0x01, 0x008d, 0x001c}, {0x01, 0x00ce, 0x001d}, {0x01, 0x008d, 0x001e}, {0x01, 0x0000, 0x001f}, {0x01, 0x0000, 0x0020}, {0x01, 0x00ff, 0x003e}, {0x01, 0x0003, 0x003f}, {0x01, 0x0000, 0x0040}, {0x01, 0x0035, 0x0041}, {0x01, 0x0053, 0x0042}, {0x01, 0x0069, 0x0043}, {0x01, 0x007c, 0x0044}, {0x01, 0x008c, 0x0045}, {0x01, 0x009a, 0x0046}, {0x01, 0x00a8, 0x0047}, {0x01, 0x00b4, 0x0048}, {0x01, 0x00bf, 0x0049}, {0x01, 0x00ca, 0x004a}, {0x01, 0x00d4, 0x004b}, {0x01, 0x00dd, 0x004c}, {0x01, 0x00e7, 0x004d}, {0x01, 0x00ef, 0x004e}, {0x01, 0x00f8, 0x004f}, {0x01, 0x00ff, 0x0050}, {0x01, 0x0001, 0x0056}, {0x01, 0x0060, 0x0057}, {0x01, 0x0040, 0x0058}, {0x01, 0x0011, 0x0059}, {0x01, 0x0001, 0x005a}, {0x02, 0x0007, 0x0005}, {0x02, 0xa048, 0x0000}, {0x02, 0x0007, 0x0005}, {0x02, 0x0015, 0x0006}, {0x02, 0x100a, 0x0007}, {0x02, 0xa048, 0x0000}, {0x02, 0xc002, 0x0001}, {0x02, 0x000f, 0x0005}, {0x02, 0xa048, 0x0000}, {0x05, 0x0022, 0x0004}, {0x05, 0x0025, 0x0001}, {0x05, 0x0000, 0x0000}, {0x05, 0x0026, 0x0001}, {0x05, 0x0001, 0x0000}, {0x05, 0x0027, 0x0001}, {0x05, 0x0000, 0x0000}, {0x05, 0x0001, 0x0001}, {0x05, 0x0000, 0x0000}, {0x05, 0x0021, 0x0001}, {0x05, 0x00d2, 0x0000}, {0x05, 0x0020, 0x0001}, {0x05, 0x0000, 0x0000}, {0x00, 0x0090, 0x0005}, {0x01, 0x00a6, 0x0000}, {0x02, 0x0007, 0x0005}, {0x02, 0x2000, 0x0000}, {0x05, 0x0022, 0x0004}, {0x05, 0x0015, 0x0001}, {0x05, 0x00ea, 0x0000}, {0x05, 0x0021, 0x0001}, {0x05, 0x00d2, 0x0000}, {0x05, 0x0023, 0x0001}, {0x05, 0x0003, 0x0000}, {0x05, 0x0030, 0x0001}, {0x05, 0x002b, 0x0000}, {0x05, 0x0031, 0x0001}, {0x05, 0x0023, 0x0000}, {0x05, 0x0032, 0x0001}, {0x05, 0x0023, 0x0000}, {0x05, 0x0033, 0x0001}, {0x05, 0x0023, 0x0000}, {0x05, 0x0034, 0x0001}, {0x05, 0x0002, 0x0000}, {0x05, 0x0050, 0x0001}, {0x05, 0x0000, 0x0000}, {0x05, 0x0051, 0x0001}, {0x05, 0x0000, 0x0000}, {0x05, 0x0052, 0x0001}, {0x05, 0x0000, 0x0000}, {0x05, 0x0054, 0x0001}, {0x05, 0x0001, 0x0000}, {0x00, 0x0000, 0x0001}, {0x00, 0x0000, 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0x000f, 0x0000}, {0x01, 0x0003, 0x003f}, {0x01, 0x0001, 0x0056}, {0x01, 0x0011, 0x0008}, {0x01, 0x0032, 0x0009}, {0x01, 0xfffd, 0x000a}, {0x01, 0x0023, 0x000b}, {0x01, 0xffea, 0x000c}, {0x01, 0xfff4, 0x000d}, {0x01, 0xfffc, 0x000e}, {0x01, 0xffe3, 0x000f}, {0x01, 0x001f, 0x0010}, {0x01, 0x00a8, 0x0001}, {0x01, 0x0067, 0x0007}, {0x01, 0x0042, 0x0051}, {0x01, 0x0051, 0x0053}, {0x01, 0x000a, 0x0003}, {0x02, 0xc002, 0x0001}, {0x02, 0x0007, 0x0005}, {0x02, 0xc000, 0x0001}, {0x02, 0x0000, 0x0005}, {0x02, 0x0007, 0x0005}, {0x02, 0x2000, 0x0000}, {0x05, 0x0022, 0x0004}, {0x05, 0x0015, 0x0001}, {0x05, 0x00ea, 0x0000}, {0x05, 0x0021, 0x0001}, {0x05, 0x00d2, 0x0000}, {0x05, 0x0023, 0x0001}, {0x05, 0x0003, 0x0000}, {0x05, 0x0030, 0x0001}, {0x05, 0x002b, 0x0000}, {0x05, 0x0031, 0x0001}, {0x05, 0x0023, 0x0000}, {0x05, 0x0032, 0x0001}, {0x05, 0x0023, 0x0000}, {0x05, 0x0033, 0x0001}, {0x05, 0x0023, 0x0000}, {0x05, 0x0034, 0x0001}, {0x05, 0x0002, 0x0000}, {0x05, 0x0050, 0x0001}, {0x05, 0x0000, 0x0000}, {0x05, 0x0051, 0x0001}, {0x05, 0x0000, 0x0000}, {0x05, 0x0052, 0x0001}, {0x05, 0x0000, 0x0000}, {0x05, 0x0054, 0x0001}, {0x05, 0x0001, 0x0000}, {0x00, 0x0000, 0x0001}, {0x00, 0x0000, 0x0002}, {0x00, 0x000c, 0x0003}, {0x00, 0x0000, 0x0004}, {0x00, 0x0090, 0x0005}, {0x00, 0x0000, 0x0006}, {0x00, 0x0040, 0x0007}, {0x00, 0x00c0, 0x0008}, {0x00, 0x004a, 0x0009}, {0x00, 0x0000, 0x000a}, {0x00, 0x0000, 0x000b}, {0x00, 0x0001, 0x000c}, {0x00, 0x0001, 0x000d}, {0x00, 0x0000, 0x000e}, {0x00, 0x0002, 0x000f}, {0x00, 0x0001, 0x0010}, {0x00, 0x0000, 0x0011}, {0x00, 0x0000, 0x0012}, {0x00, 0x0002, 0x0020}, {0x00, 0x0080, 0x0021}, {0x00, 0x0001, 0x0022}, {0x00, 0x00e0, 0x0023}, {0x00, 0x0000, 0x0024}, {0x00, 0x00d5, 0x0025}, {0x00, 0x0000, 0x0026}, {0x00, 0x000b, 0x0027}, {0x00, 0x0000, 0x0046}, {0x00, 0x0000, 0x0047}, {0x00, 0x0000, 0x0048}, {0x00, 0x0000, 0x0049}, {0x00, 0x0008, 0x004a}, {0xff, 0x0000, 0x00d0}, {0xff, 0x00d8, 0x00d1}, {0xff, 0x0000, 0x00d4}, {0xff, 0x0000, 0x00d5}, {0x01, 0x00a6, 0x0000}, {0x01, 0x0028, 0x0001}, {0x01, 0x0000, 0x0002}, {0x01, 0x000a, 0x0003}, {0x01, 0x0040, 0x0004}, {0x01, 0x0066, 0x0007}, {0x01, 0x0011, 0x0008}, {0x01, 0x0032, 0x0009}, {0x01, 0x00fd, 0x000a}, {0x01, 0x0038, 0x000b}, {0x01, 0x00d1, 0x000c}, {0x01, 0x00f7, 0x000d}, {0x01, 0x00ed, 0x000e}, {0x01, 0x00d8, 0x000f}, {0x01, 0x0038, 0x0010}, {0x01, 0x00ff, 0x0015}, {0x01, 0x0001, 0x0016}, {0x01, 0x0032, 0x0017}, {0x01, 0x0023, 0x0018}, {0x01, 0x00ce, 0x0019}, {0x01, 0x0023, 0x001a}, {0x01, 0x0032, 0x001b}, {0x01, 0x008d, 0x001c}, {0x01, 0x00ce, 0x001d}, {0x01, 0x008d, 0x001e}, {0x01, 0x0000, 0x001f}, {0x01, 0x0000, 0x0020}, {0x01, 0x00ff, 0x003e}, {0x01, 0x0003, 0x003f}, {0x01, 0x0000, 0x0040}, {0x01, 0x0035, 0x0041}, {0x01, 0x0053, 0x0042}, {0x01, 0x0069, 0x0043}, {0x01, 0x007c, 0x0044}, {0x01, 0x008c, 0x0045}, {0x01, 0x009a, 0x0046}, {0x01, 0x00a8, 0x0047}, {0x01, 0x00b4, 0x0048}, {0x01, 0x00bf, 0x0049}, {0x01, 0x00ca, 0x004a}, {0x01, 0x00d4, 0x004b}, {0x01, 0x00dd, 0x004c}, {0x01, 0x00e7, 0x004d}, {0x01, 0x00ef, 0x004e}, {0x01, 0x00f8, 0x004f}, {0x01, 0x00ff, 0x0050}, {0x01, 0x0001, 0x0056}, {0x01, 0x0060, 0x0057}, {0x01, 0x0040, 0x0058}, {0x01, 0x0011, 0x0059}, {0x01, 0x0001, 0x005a}, {0x02, 0x0007, 0x0005}, {0x02, 0xa048, 0x0000}, {0x02, 0x0007, 0x0005}, {0x02, 0x0015, 0x0006}, {0x02, 0x100a, 0x0007}, {0x02, 0xa048, 0x0000}, {0x02, 0xc002, 0x0001}, {0x02, 0x000f, 0x0005}, {0x02, 0xa048, 0x0000}, {0x05, 0x0022, 0x0004}, {0x05, 0x0025, 0x0001}, {0x05, 0x0000, 0x0000}, {0x05, 0x0026, 0x0001}, {0x05, 0x0001, 0x0000}, {0x05, 0x0027, 0x0001}, {0x05, 0x0000, 0x0000}, {0x05, 0x0001, 0x0001}, {0x05, 0x0000, 0x0000}, {0x05, 0x0021, 0x0001}, {0x05, 0x00d2, 0x0000}, {0x05, 0x0020, 0x0001}, {0x05, 0x0000, 0x0000}, {0x00, 0x0090, 0x0005}, {0x01, 0x00a6, 0x0000}, {0x02, 0x0007, 0x0005}, {0x02, 0x2000, 0x0000}, {0x05, 0x0022, 0x0004}, {0x05, 0x0015, 0x0001}, {0x05, 0x00ea, 0x0000}, {0x05, 0x0021, 0x0001}, {0x05, 0x00d2, 0x0000}, {0x05, 0x0023, 0x0001}, {0x05, 0x0003, 0x0000}, {0x05, 0x0030, 0x0001}, {0x05, 0x002b, 0x0000}, {0x05, 0x0031, 0x0001}, {0x05, 0x0023, 0x0000}, {0x05, 0x0032, 0x0001}, {0x05, 0x0023, 0x0000}, {0x05, 0x0033, 0x0001}, {0x05, 0x0023, 0x0000}, {0x05, 0x0034, 0x0001}, {0x05, 0x0002, 0x0000}, {0x05, 0x0050, 0x0001}, {0x05, 0x0000, 0x0000}, {0x05, 0x0051, 0x0001}, {0x05, 0x0000, 0x0000}, {0x05, 0x0052, 0x0001}, {0x05, 0x0000, 0x0000}, {0x05, 0x0054, 0x0001}, {0x05, 0x0001, 0x0000}, {0x00, 0x0000, 0x0001}, {0x00, 0x0000, 0x0002}, {0x00, 0x000c, 0x0003}, {0x00, 0x0000, 0x0004}, {0x00, 0x0090, 0x0005}, {0x00, 0x0000, 0x0006}, {0x00, 0x0040, 0x0007}, {0x00, 0x00c0, 0x0008}, {0x00, 0x004a, 0x0009}, {0x00, 0x0000, 0x000a}, {0x00, 0x0000, 0x000b}, {0x00, 0x0001, 0x000c}, {0x00, 0x0001, 0x000d}, {0x00, 0x0000, 0x000e}, {0x00, 0x0002, 0x000f}, {0x00, 0x0001, 0x0010}, {0x00, 0x0000, 0x0011}, {0x00, 0x0000, 0x0012}, {0x00, 0x0002, 0x0020}, {0x00, 0x0080, 0x0021}, {0x00, 0x0001, 0x0022}, {0x00, 0x00e0, 0x0023}, {0x00, 0x0000, 0x0024}, {0x00, 0x00d5, 0x0025}, {0x00, 0x0000, 0x0026}, {0x00, 0x000b, 0x0027}, {0x00, 0x0000, 0x0046}, {0x00, 0x0000, 0x0047}, {0x00, 0x0000, 0x0048}, {0x00, 0x0000, 0x0049}, {0x00, 0x0008, 0x004a}, {0xff, 0x0000, 0x00d0}, {0xff, 0x00d8, 0x00d1}, {0xff, 0x0000, 0x00d4}, {0xff, 0x0000, 0x00d5}, {0x01, 0x00a6, 0x0000}, {0x01, 0x0028, 0x0001}, {0x01, 0x0000, 0x0002}, {0x01, 0x000a, 0x0003}, {0x01, 0x0040, 0x0004}, {0x01, 0x0066, 0x0007}, {0x01, 0x0011, 0x0008}, {0x01, 0x0032, 0x0009}, {0x01, 0x00fd, 0x000a}, {0x01, 0x0038, 0x000b}, {0x01, 0x00d1, 0x000c}, {0x01, 0x00f7, 0x000d}, {0x01, 0x00ed, 0x000e}, {0x01, 0x00d8, 0x000f}, {0x01, 0x0038, 0x0010}, {0x01, 0x00ff, 0x0015}, {0x01, 0x0001, 0x0016}, {0x01, 0x0032, 0x0017}, {0x01, 0x0023, 0x0018}, {0x01, 0x00ce, 0x0019}, {0x01, 0x0023, 0x001a}, {0x01, 0x0032, 0x001b}, {0x01, 0x008d, 0x001c}, {0x01, 0x00ce, 0x001d}, {0x01, 0x008d, 0x001e}, {0x01, 0x0000, 0x001f}, {0x01, 0x0000, 0x0020}, {0x01, 0x00ff, 0x003e}, {0x01, 0x0003, 0x003f}, {0x01, 0x0000, 0x0040}, {0x01, 0x0035, 0x0041}, {0x01, 0x0053, 0x0042}, {0x01, 0x0069, 0x0043}, {0x01, 0x007c, 0x0044}, {0x01, 0x008c, 0x0045}, {0x01, 0x009a, 0x0046}, {0x01, 0x00a8, 0x0047}, {0x01, 0x00b4, 0x0048}, {0x01, 0x00bf, 0x0049}, {0x01, 0x00ca, 0x004a}, {0x01, 0x00d4, 0x004b}, {0x01, 0x00dd, 0x004c}, {0x01, 0x00e7, 0x004d}, {0x01, 0x00ef, 0x004e}, {0x01, 0x00f8, 0x004f}, {0x01, 0x00ff, 0x0050}, {0x01, 0x0001, 0x0056}, {0x01, 0x0060, 0x0057}, {0x01, 0x0040, 0x0058}, {0x01, 0x0011, 0x0059}, {0x01, 0x0001, 0x005a}, {0x02, 0x0007, 0x0005}, {0x02, 0xa048, 0x0000}, {0x02, 0x0007, 0x0005}, {0x02, 0x0015, 0x0006}, {0x02, 0x100a, 0x0007}, {0x02, 0xa048, 0x0000}, {0x02, 0xc002, 0x0001}, {0x02, 0x000f, 0x0005}, {0x02, 0xa048, 0x0000}, {0x05, 0x0022, 0x0004}, {0x05, 0x0025, 0x0001}, {0x05, 0x0000, 0x0000}, {0x05, 0x0026, 0x0001}, {0x05, 0x0001, 0x0000}, {0x05, 0x0027, 0x0001}, {0x05, 0x0000, 0x0000}, {0x05, 0x0001, 0x0001}, {0x05, 0x0000, 0x0000}, {0x05, 0x0021, 0x0001}, {0x05, 0x00d2, 0x0000}, {0x05, 0x0020, 0x0001}, {0x05, 0x0000, 0x0000}, {0x00, 0x0090, 0x0005}, {0x01, 0x00a6, 0x0000}, {0x05, 0x0026, 0x0001}, {0x05, 0x0001, 0x0000}, {0x05, 0x0027, 0x0001}, {0x05, 0x001e, 0x0000}, {0x01, 0x0003, 0x003f}, {0x01, 0x0001, 0x0056}, {0x01, 0x0011, 0x0008}, {0x01, 0x0032, 0x0009}, {0x01, 0xfffd, 0x000a}, {0x01, 0x0023, 0x000b}, {0x01, 0xffea, 0x000c}, {0x01, 0xfff4, 0x000d}, {0x01, 0xfffc, 0x000e}, {0x01, 0xffe3, 0x000f}, {0x01, 0x001f, 0x0010}, {0x01, 0x00a8, 0x0001}, {0x01, 0x0067, 0x0007}, {0x01, 0x0042, 0x0051}, {0x01, 0x0051, 0x0053}, {0x01, 0x000a, 0x0003}, {0x02, 0xc002, 0x0001}, {0x02, 0x0007, 0x0005}, {0x01, 0x0042, 0x0051}, {0x01, 0x0051, 0x0053}, {0x05, 0x0026, 0x0001}, {0x05, 0x0001, 0x0000}, {0x05, 0x0027, 0x0001}, {0x05, 0x002d, 0x0000}, {0x01, 0x0003, 0x003f}, {0x01, 0x0001, 0x0056}, {0x02, 0xc000, 0x0001}, {0x02, 0x0000, 0x0005}, {} }; /* Unknown camera from Ori Usbid 0x0000:0x0000 */ /* Based on snoops from Ori Cohen */ static const __u16 spca501c_mysterious_open_data[][3] = { {0x02, 0x000f, 0x0005}, {0x02, 0xa048, 0x0000}, {0x05, 0x0022, 0x0004}, /* DSP Registers */ {0x01, 0x0016, 0x0011}, /* RGB offset */ {0x01, 0x0000, 0x0012}, {0x01, 0x0006, 0x0013}, {0x01, 0x0078, 0x0051}, {0x01, 0x0040, 0x0052}, {0x01, 0x0046, 0x0053}, {0x01, 0x0040, 0x0054}, {0x00, 0x0025, 0x0000}, /* {0x00, 0x0000, 0x0000 }, */ /* Part 2 */ /* TG Registers */ {0x00, 0x0026, 0x0000}, {0x00, 0x0001, 0x0000}, {0x00, 0x0027, 0x0000}, {0x00, 0x008a, 0x0000}, {0x02, 0x0007, 0x0005}, {0x02, 0x2000, 0x0000}, {0x05, 0x0022, 0x0004}, {0x05, 0x0015, 0x0001}, {0x05, 0x00ea, 0x0000}, {0x05, 0x0021, 0x0001}, {0x05, 0x00d2, 0x0000}, {0x05, 0x0023, 0x0001}, {0x05, 0x0003, 0x0000}, {0x05, 0x0030, 0x0001}, {0x05, 0x002b, 0x0000}, {0x05, 0x0031, 0x0001}, {0x05, 0x0023, 0x0000}, {0x05, 0x0032, 0x0001}, {0x05, 0x0023, 0x0000}, {0x05, 0x0033, 0x0001}, {0x05, 0x0023, 0x0000}, {0x05, 0x0034, 0x0001}, {0x05, 0x0002, 0x0000}, {0x05, 0x0050, 0x0001}, {0x05, 0x0000, 0x0000}, {0x05, 0x0051, 0x0001}, {0x05, 0x0000, 0x0000}, {0x05, 0x0052, 0x0001}, {0x05, 0x0000, 0x0000}, {0x05, 0x0054, 0x0001}, {0x05, 0x0001, 0x0000}, {} }; /* Based on snoops from Ori Cohen */ static const __u16 spca501c_mysterious_init_data[][3] = { /* Part 3 */ /* TG registers */ /* {0x00, 0x0000, 0x0000}, */ {0x00, 0x0000, 0x0001}, {0x00, 0x0000, 0x0002}, {0x00, 0x0006, 0x0003}, {0x00, 0x0000, 0x0004}, {0x00, 0x0090, 0x0005}, {0x00, 0x0000, 0x0006}, {0x00, 0x0040, 0x0007}, {0x00, 0x00c0, 0x0008}, {0x00, 0x004a, 0x0009}, {0x00, 0x0000, 0x000a}, {0x00, 0x0000, 0x000b}, {0x00, 0x0001, 0x000c}, {0x00, 0x0001, 0x000d}, {0x00, 0x0000, 0x000e}, {0x00, 0x0002, 0x000f}, {0x00, 0x0001, 0x0010}, {0x00, 0x0000, 0x0011}, {0x00, 0x0001, 0x0012}, {0x00, 0x0002, 0x0020}, {0x00, 0x0080, 0x0021}, /* 640 */ {0x00, 0x0001, 0x0022}, {0x00, 0x00e0, 0x0023}, /* 480 */ {0x00, 0x0000, 0x0024}, /* Offset H hight */ {0x00, 0x00d3, 0x0025}, /* low */ {0x00, 0x0000, 0x0026}, /* Offset V */ {0x00, 0x000d, 0x0027}, /* low */ {0x00, 0x0000, 0x0046}, {0x00, 0x0000, 0x0047}, {0x00, 0x0000, 0x0048}, {0x00, 0x0000, 0x0049}, {0x00, 0x0008, 0x004a}, /* DSP Registers */ {0x01, 0x00a6, 0x0000}, {0x01, 0x0028, 0x0001}, {0x01, 0x0000, 0x0002}, {0x01, 0x000a, 0x0003}, /* Level Calc bit7 ->1 Auto */ {0x01, 0x0040, 0x0004}, {0x01, 0x0066, 0x0007}, {0x01, 0x000f, 0x0008}, /* A11 Color correction coeff */ {0x01, 0x002d, 0x0009}, /* A12 */ {0x01, 0x0005, 0x000a}, /* A13 */ {0x01, 0x0023, 0x000b}, /* A21 */ {0x01, 0x00e0, 0x000c}, /* A22 */ {0x01, 0x00fd, 0x000d}, /* A23 */ {0x01, 0x00f4, 0x000e}, /* A31 */ {0x01, 0x00e4, 0x000f}, /* A32 */ {0x01, 0x0028, 0x0010}, /* A33 */ {0x01, 0x00ff, 0x0015}, /* Reserved */ {0x01, 0x0001, 0x0016}, /* Reserved */ {0x01, 0x0032, 0x0017}, /* Win1 Start begin */ {0x01, 0x0023, 0x0018}, {0x01, 0x00ce, 0x0019}, {0x01, 0x0023, 0x001a}, {0x01, 0x0032, 0x001b}, {0x01, 0x008d, 0x001c}, {0x01, 0x00ce, 0x001d}, {0x01, 0x008d, 0x001e}, {0x01, 0x0000, 0x001f}, {0x01, 0x0000, 0x0020}, /* Win1 Start end */ {0x01, 0x00ff, 0x003e}, /* Reserved begin */ {0x01, 0x0002, 0x003f}, {0x01, 0x0000, 0x0040}, {0x01, 0x0035, 0x0041}, {0x01, 0x0053, 0x0042}, {0x01, 0x0069, 0x0043}, {0x01, 0x007c, 0x0044}, {0x01, 0x008c, 0x0045}, {0x01, 0x009a, 0x0046}, {0x01, 0x00a8, 0x0047}, {0x01, 0x00b4, 0x0048}, {0x01, 0x00bf, 0x0049}, {0x01, 0x00ca, 0x004a}, {0x01, 0x00d4, 0x004b}, {0x01, 0x00dd, 0x004c}, {0x01, 0x00e7, 0x004d}, {0x01, 0x00ef, 0x004e}, {0x01, 0x00f8, 0x004f}, {0x01, 0x00ff, 0x0050}, {0x01, 0x0003, 0x0056}, /* Reserved end */ {0x01, 0x0060, 0x0057}, /* Edge Gain */ {0x01, 0x0040, 0x0058}, {0x01, 0x0011, 0x0059}, /* Edge Bandwidth */ {0x01, 0x0001, 0x005a}, {0x02, 0x0007, 0x0005}, {0x02, 0xa048, 0x0000}, {0x02, 0x0007, 0x0005}, {0x02, 0x0015, 0x0006}, {0x02, 0x200a, 0x0007}, {0x02, 0xa048, 0x0000}, {0x02, 0xc000, 0x0001}, {0x02, 0x000f, 0x0005}, {0x02, 0xa048, 0x0000}, {0x05, 0x0022, 0x0004}, {0x05, 0x0025, 0x0001}, {0x05, 0x0000, 0x0000}, /* Part 4 */ {0x05, 0x0026, 0x0001}, {0x05, 0x0001, 0x0000}, {0x05, 0x0027, 0x0001}, {0x05, 0x0000, 0x0000}, {0x05, 0x0001, 0x0001}, {0x05, 0x0000, 0x0000}, {0x05, 0x0021, 0x0001}, {0x05, 0x00d2, 0x0000}, {0x05, 0x0020, 0x0001}, {0x05, 0x0000, 0x0000}, {0x00, 0x0090, 0x0005}, {0x01, 0x00a6, 0x0000}, {0x02, 0x0000, 0x0005}, {0x05, 0x0026, 0x0001}, {0x05, 0x0001, 0x0000}, {0x05, 0x0027, 0x0001}, {0x05, 0x004e, 0x0000}, /* Part 5 */ {0x01, 0x0003, 0x003f}, {0x01, 0x0001, 0x0056}, {0x01, 0x000f, 0x0008}, {0x01, 0x002d, 0x0009}, {0x01, 0x0005, 0x000a}, {0x01, 0x0023, 0x000b}, {0x01, 0xffe0, 0x000c}, {0x01, 0xfffd, 0x000d}, {0x01, 0xfff4, 0x000e}, {0x01, 0xffe4, 0x000f}, {0x01, 0x0028, 0x0010}, {0x01, 0x00a8, 0x0001}, {0x01, 0x0066, 0x0007}, {0x01, 0x0032, 0x0017}, {0x01, 0x0023, 0x0018}, {0x01, 0x00ce, 0x0019}, {0x01, 0x0023, 0x001a}, {0x01, 0x0032, 0x001b}, {0x01, 0x008d, 0x001c}, {0x01, 0x00ce, 0x001d}, {0x01, 0x008d, 0x001e}, {0x01, 0x00c8, 0x0015}, /* c8 Poids fort Luma */ {0x01, 0x0032, 0x0016}, /* 32 */ {0x01, 0x0016, 0x0011}, /* R 00 */ {0x01, 0x0016, 0x0012}, /* G 00 */ {0x01, 0x0016, 0x0013}, /* B 00 */ {0x01, 0x000a, 0x0003}, {0x02, 0xc002, 0x0001}, {0x02, 0x0007, 0x0005}, {} }; static int reg_write(struct gspca_dev *gspca_dev, __u16 req, __u16 index, __u16 value) { int ret; struct usb_device *dev = gspca_dev->dev; ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), req, USB_TYPE_VENDOR | USB_RECIP_DEVICE, value, index, NULL, 0, 500); gspca_dbg(gspca_dev, D_USBO, "reg write: 0x%02x 0x%02x 0x%02x\n", req, index, value); if (ret < 0) pr_err("reg write: error %d\n", ret); return ret; } static int write_vector(struct gspca_dev *gspca_dev, const __u16 data[][3]) { int ret, i = 0; while (data[i][0] != 0 || data[i][1] != 0 || data[i][2] != 0) { ret = reg_write(gspca_dev, data[i][0], data[i][2], data[i][1]); if (ret < 0) { gspca_err(gspca_dev, "Reg write failed for 0x%02x,0x%02x,0x%02x\n", data[i][0], data[i][1], data[i][2]); return ret; } i++; } return 0; } static void setbrightness(struct gspca_dev *gspca_dev, s32 val) { reg_write(gspca_dev, SPCA501_REG_CCDSP, 0x12, val); } static void setcontrast(struct gspca_dev *gspca_dev, s32 val) { reg_write(gspca_dev, 0x00, 0x00, (val >> 8) & 0xff); reg_write(gspca_dev, 0x00, 0x01, val & 0xff); } static void setcolors(struct gspca_dev *gspca_dev, s32 val) { reg_write(gspca_dev, SPCA501_REG_CCDSP, 0x0c, val); } static void setblue_balance(struct gspca_dev *gspca_dev, s32 val) { reg_write(gspca_dev, SPCA501_REG_CCDSP, 0x11, val); } static void setred_balance(struct gspca_dev *gspca_dev, s32 val) { reg_write(gspca_dev, SPCA501_REG_CCDSP, 0x13, val); } /* this function is called at probe time */ static int sd_config(struct gspca_dev *gspca_dev, const struct usb_device_id *id) { struct sd *sd = (struct sd *) gspca_dev; struct cam *cam; cam = &gspca_dev->cam; cam->cam_mode = vga_mode; cam->nmodes = ARRAY_SIZE(vga_mode); sd->subtype = id->driver_info; return 0; } /* this function is called at probe and resume time */ static int sd_init(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; switch (sd->subtype) { case Arowana300KCMOSCamera: case SmileIntlCamera: /* Arowana 300k CMOS Camera data */ if (write_vector(gspca_dev, spca501c_arowana_init_data)) goto error; break; case MystFromOriUnknownCamera: /* Unknown Ori CMOS Camera data */ if (write_vector(gspca_dev, spca501c_mysterious_open_data)) goto error; break; default: /* generic spca501 init data */ if (write_vector(gspca_dev, spca501_init_data)) goto error; break; } gspca_dbg(gspca_dev, D_STREAM, "Initializing SPCA501 finished\n"); return 0; error: return -EINVAL; } static int sd_start(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; int mode; switch (sd->subtype) { case ThreeComHomeConnectLite: /* Special handling for 3com data */ write_vector(gspca_dev, spca501_3com_open_data); break; case Arowana300KCMOSCamera: case SmileIntlCamera: /* Arowana 300k CMOS Camera data */ write_vector(gspca_dev, spca501c_arowana_open_data); break; case MystFromOriUnknownCamera: /* Unknown CMOS Camera data */ write_vector(gspca_dev, spca501c_mysterious_init_data); break; default: /* Generic 501 open data */ write_vector(gspca_dev, spca501_open_data); } /* memorize the wanted pixel format */ mode = gspca_dev->cam.cam_mode[(int) gspca_dev->curr_mode].priv; /* Enable ISO packet machine CTRL reg=2, * index=1 bitmask=0x2 (bit ordinal 1) */ reg_write(gspca_dev, SPCA50X_REG_USB, 0x6, 0x94); switch (mode) { case 0: /* 640x480 */ reg_write(gspca_dev, SPCA50X_REG_USB, 0x07, 0x004a); break; case 1: /* 320x240 */ reg_write(gspca_dev, SPCA50X_REG_USB, 0x07, 0x104a); break; default: /* case 2: * 160x120 */ reg_write(gspca_dev, SPCA50X_REG_USB, 0x07, 0x204a); break; } reg_write(gspca_dev, SPCA501_REG_CTLRL, 0x01, 0x02); return 0; } static void sd_stopN(struct gspca_dev *gspca_dev) { /* Disable ISO packet * machine CTRL reg=2, index=1 bitmask=0x0 (bit ordinal 1) */ reg_write(gspca_dev, SPCA501_REG_CTLRL, 0x01, 0x00); } /* called on streamoff with alt 0 and on disconnect */ static void sd_stop0(struct gspca_dev *gspca_dev) { if (!gspca_dev->present) return; reg_write(gspca_dev, SPCA501_REG_CTLRL, 0x05, 0x00); } static void sd_pkt_scan(struct gspca_dev *gspca_dev, u8 *data, /* isoc packet */ int len) /* iso packet length */ { switch (data[0]) { case 0: /* start of frame */ gspca_frame_add(gspca_dev, LAST_PACKET, NULL, 0); data += SPCA501_OFFSET_DATA; len -= SPCA501_OFFSET_DATA; gspca_frame_add(gspca_dev, FIRST_PACKET, data, len); return; case 0xff: /* drop */ /* gspca_dev->last_packet_type = DISCARD_PACKET; */ return; } data++; len--; gspca_frame_add(gspca_dev, INTER_PACKET, data, len); } static int sd_s_ctrl(struct v4l2_ctrl *ctrl) { struct gspca_dev *gspca_dev = container_of(ctrl->handler, struct gspca_dev, ctrl_handler); gspca_dev->usb_err = 0; if (!gspca_dev->streaming) return 0; switch (ctrl->id) { case V4L2_CID_BRIGHTNESS: setbrightness(gspca_dev, ctrl->val); break; case V4L2_CID_CONTRAST: setcontrast(gspca_dev, ctrl->val); break; case V4L2_CID_SATURATION: setcolors(gspca_dev, ctrl->val); break; case V4L2_CID_BLUE_BALANCE: setblue_balance(gspca_dev, ctrl->val); break; case V4L2_CID_RED_BALANCE: setred_balance(gspca_dev, ctrl->val); break; } return gspca_dev->usb_err; } static const struct v4l2_ctrl_ops sd_ctrl_ops = { .s_ctrl = sd_s_ctrl, }; static int sd_init_controls(struct gspca_dev *gspca_dev) { struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler; gspca_dev->vdev.ctrl_handler = hdl; v4l2_ctrl_handler_init(hdl, 5); v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, V4L2_CID_BRIGHTNESS, 0, 127, 1, 0); v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, V4L2_CID_CONTRAST, 0, 64725, 1, 64725); v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, V4L2_CID_SATURATION, 0, 63, 1, 20); v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, V4L2_CID_BLUE_BALANCE, 0, 127, 1, 0); v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, V4L2_CID_RED_BALANCE, 0, 127, 1, 0); if (hdl->error) { pr_err("Could not initialize controls\n"); return hdl->error; } return 0; } /* sub-driver description */ static const struct sd_desc sd_desc = { .name = MODULE_NAME, .config = sd_config, .init = sd_init, .init_controls = sd_init_controls, .start = sd_start, .stopN = sd_stopN, .stop0 = sd_stop0, .pkt_scan = sd_pkt_scan, }; /* -- module initialisation -- */ static const struct usb_device_id device_table[] = { {USB_DEVICE(0x040a, 0x0002), .driver_info = KodakDVC325}, {USB_DEVICE(0x0497, 0xc001), .driver_info = SmileIntlCamera}, {USB_DEVICE(0x0506, 0x00df), .driver_info = ThreeComHomeConnectLite}, {USB_DEVICE(0x0733, 0x0401), .driver_info = IntelCreateAndShare}, {USB_DEVICE(0x0733, 0x0402), .driver_info = ViewQuestM318B}, {USB_DEVICE(0x1776, 0x501c), .driver_info = Arowana300KCMOSCamera}, {USB_DEVICE(0x0000, 0x0000), .driver_info = MystFromOriUnknownCamera}, {} }; MODULE_DEVICE_TABLE(usb, device_table); /* -- device connect -- */ static int sd_probe(struct usb_interface *intf, const struct usb_device_id *id) { return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd), THIS_MODULE); } static struct usb_driver sd_driver = { .name = MODULE_NAME, .id_table = device_table, .probe = sd_probe, .disconnect = gspca_disconnect, #ifdef CONFIG_PM .suspend = gspca_suspend, .resume = gspca_resume, .reset_resume = gspca_resume, #endif }; module_usb_driver(sd_driver); |
| 3 4412 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 | /* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) 2014 Felix Fietkau <nbd@nbd.name> * Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com> */ #ifndef _LINUX_BITFIELD_H #define _LINUX_BITFIELD_H #include <linux/build_bug.h> #include <linux/typecheck.h> #include <asm/byteorder.h> /* * Bitfield access macros * * FIELD_{GET,PREP} macros take as first parameter shifted mask * from which they extract the base mask and shift amount. * Mask must be a compilation time constant. * field_{get,prep} are variants that take a non-const mask. * * Example: * * #include <linux/bitfield.h> * #include <linux/bits.h> * * #define REG_FIELD_A GENMASK(6, 0) * #define REG_FIELD_B BIT(7) * #define REG_FIELD_C GENMASK(15, 8) * #define REG_FIELD_D GENMASK(31, 16) * * Get: * a = FIELD_GET(REG_FIELD_A, reg); * b = FIELD_GET(REG_FIELD_B, reg); * * Set: * reg = FIELD_PREP(REG_FIELD_A, 1) | * FIELD_PREP(REG_FIELD_B, 0) | * FIELD_PREP(REG_FIELD_C, c) | * FIELD_PREP(REG_FIELD_D, 0x40); * * Modify: * FIELD_MODIFY(REG_FIELD_C, ®, c); */ #define __bf_shf(x) (__builtin_ffsll(x) - 1) #define __scalar_type_to_unsigned_cases(type) \ unsigned type: (unsigned type)0, \ signed type: (unsigned type)0 #define __unsigned_scalar_typeof(x) typeof( \ _Generic((x), \ char: (unsigned char)0, \ __scalar_type_to_unsigned_cases(char), \ __scalar_type_to_unsigned_cases(short), \ __scalar_type_to_unsigned_cases(int), \ __scalar_type_to_unsigned_cases(long), \ __scalar_type_to_unsigned_cases(long long), \ default: (x))) #define __bf_cast_unsigned(type, x) ((__unsigned_scalar_typeof(type))(x)) #define __BF_FIELD_CHECK_MASK(_mask, _val, _pfx) \ ({ \ BUILD_BUG_ON_MSG(!__builtin_constant_p(_mask), \ _pfx "mask is not constant"); \ BUILD_BUG_ON_MSG((_mask) == 0, _pfx "mask is zero"); \ BUILD_BUG_ON_MSG(__builtin_constant_p(_val) ? \ ~((_mask) >> __bf_shf(_mask)) & \ (0 + (_val)) : 0, \ _pfx "value too large for the field"); \ __BUILD_BUG_ON_NOT_POWER_OF_2((_mask) + \ (1ULL << __bf_shf(_mask))); \ }) #define __BF_FIELD_CHECK_REG(mask, reg, pfx) \ BUILD_BUG_ON_MSG(__bf_cast_unsigned(mask, mask) > \ __bf_cast_unsigned(reg, ~0ull), \ pfx "type of reg too small for mask") #define __BF_FIELD_CHECK(mask, reg, val, pfx) \ ({ \ __BF_FIELD_CHECK_MASK(mask, val, pfx); \ __BF_FIELD_CHECK_REG(mask, reg, pfx); \ }) #define __FIELD_PREP(mask, val, pfx) \ ({ \ __BF_FIELD_CHECK_MASK(mask, val, pfx); \ ((typeof(mask))(val) << __bf_shf(mask)) & (mask); \ }) #define __FIELD_GET(mask, reg, pfx) \ ({ \ __BF_FIELD_CHECK_MASK(mask, 0U, pfx); \ (typeof(mask))(((reg) & (mask)) >> __bf_shf(mask)); \ }) /** * FIELD_MAX() - produce the maximum value representable by a field * @_mask: shifted mask defining the field's length and position * * FIELD_MAX() returns the maximum value that can be held in the field * specified by @_mask. */ #define FIELD_MAX(_mask) \ ({ \ __BF_FIELD_CHECK(_mask, 0ULL, 0ULL, "FIELD_MAX: "); \ (typeof(_mask))((_mask) >> __bf_shf(_mask)); \ }) /** * FIELD_FIT() - check if value fits in the field * @_mask: shifted mask defining the field's length and position * @_val: value to test against the field * * Return: true if @_val can fit inside @_mask, false if @_val is too big. */ #define FIELD_FIT(_mask, _val) \ ({ \ __BF_FIELD_CHECK(_mask, 0ULL, 0ULL, "FIELD_FIT: "); \ !((((typeof(_mask))_val) << __bf_shf(_mask)) & ~(_mask)); \ }) /** * FIELD_PREP() - prepare a bitfield element * @_mask: shifted mask defining the field's length and position * @_val: value to put in the field * * FIELD_PREP() masks and shifts up the value. The result should * be combined with other fields of the bitfield using logical OR. */ #define FIELD_PREP(_mask, _val) \ ({ \ __BF_FIELD_CHECK_REG(_mask, 0ULL, "FIELD_PREP: "); \ __FIELD_PREP(_mask, _val, "FIELD_PREP: "); \ }) #define __BF_CHECK_POW2(n) BUILD_BUG_ON_ZERO(((n) & ((n) - 1)) != 0) /** * FIELD_PREP_CONST() - prepare a constant bitfield element * @_mask: shifted mask defining the field's length and position * @_val: value to put in the field * * FIELD_PREP_CONST() masks and shifts up the value. The result should * be combined with other fields of the bitfield using logical OR. * * Unlike FIELD_PREP() this is a constant expression and can therefore * be used in initializers. Error checking is less comfortable for this * version, and non-constant masks cannot be used. */ #define FIELD_PREP_CONST(_mask, _val) \ ( \ /* mask must be non-zero */ \ BUILD_BUG_ON_ZERO((_mask) == 0) + \ /* check if value fits */ \ BUILD_BUG_ON_ZERO(~((_mask) >> __bf_shf(_mask)) & (_val)) + \ /* check if mask is contiguous */ \ __BF_CHECK_POW2((_mask) + (1ULL << __bf_shf(_mask))) + \ /* and create the value */ \ (((typeof(_mask))(_val) << __bf_shf(_mask)) & (_mask)) \ ) /** * FIELD_GET() - extract a bitfield element * @_mask: shifted mask defining the field's length and position * @_reg: value of entire bitfield * * FIELD_GET() extracts the field specified by @_mask from the * bitfield passed in as @_reg by masking and shifting it down. */ #define FIELD_GET(_mask, _reg) \ ({ \ __BF_FIELD_CHECK_REG(_mask, _reg, "FIELD_GET: "); \ __FIELD_GET(_mask, _reg, "FIELD_GET: "); \ }) /** * FIELD_MODIFY() - modify a bitfield element * @_mask: shifted mask defining the field's length and position * @_reg_p: pointer to the memory that should be updated * @_val: value to store in the bitfield * * FIELD_MODIFY() modifies the set of bits in @_reg_p specified by @_mask, * by replacing them with the bitfield value passed in as @_val. */ #define FIELD_MODIFY(_mask, _reg_p, _val) \ ({ \ typecheck_pointer(_reg_p); \ __BF_FIELD_CHECK(_mask, *(_reg_p), _val, "FIELD_MODIFY: "); \ *(_reg_p) &= ~(_mask); \ *(_reg_p) |= (((typeof(_mask))(_val) << __bf_shf(_mask)) & (_mask)); \ }) extern void __compiletime_error("value doesn't fit into mask") __field_overflow(void); extern void __compiletime_error("bad bitfield mask") __bad_mask(void); static __always_inline u64 field_multiplier(u64 field) { if ((field | (field - 1)) & ((field | (field - 1)) + 1)) __bad_mask(); return field & -field; } static __always_inline u64 field_mask(u64 field) { return field / field_multiplier(field); } #define field_max(field) ((typeof(field))field_mask(field)) #define ____MAKE_OP(type,base,to,from) \ static __always_inline __##type __must_check type##_encode_bits(base v, base field) \ { \ if (__builtin_constant_p(v) && (v & ~field_mask(field))) \ __field_overflow(); \ return to((v & field_mask(field)) * field_multiplier(field)); \ } \ static __always_inline __##type __must_check type##_replace_bits(__##type old, \ base val, base field) \ { \ return (old & ~to(field)) | type##_encode_bits(val, field); \ } \ static __always_inline void type##p_replace_bits(__##type *p, \ base val, base field) \ { \ *p = (*p & ~to(field)) | type##_encode_bits(val, field); \ } \ static __always_inline base __must_check type##_get_bits(__##type v, base field) \ { \ return (from(v) & field)/field_multiplier(field); \ } #define __MAKE_OP(size) \ ____MAKE_OP(le##size,u##size,cpu_to_le##size,le##size##_to_cpu) \ ____MAKE_OP(be##size,u##size,cpu_to_be##size,be##size##_to_cpu) \ ____MAKE_OP(u##size,u##size,,) ____MAKE_OP(u8,u8,,) __MAKE_OP(16) __MAKE_OP(32) __MAKE_OP(64) #undef __MAKE_OP #undef ____MAKE_OP #define __field_prep(mask, val) \ ({ \ __auto_type __mask = (mask); \ typeof(__mask) __val = (val); \ unsigned int __shift = BITS_PER_TYPE(__mask) <= 32 ? \ __ffs(__mask) : __ffs64(__mask); \ (__val << __shift) & __mask; \ }) #define __field_get(mask, reg) \ ({ \ __auto_type __mask = (mask); \ typeof(__mask) __reg = (reg); \ unsigned int __shift = BITS_PER_TYPE(__mask) <= 32 ? \ __ffs(__mask) : __ffs64(__mask); \ (__reg & __mask) >> __shift; \ }) /** * field_prep() - prepare a bitfield element * @mask: shifted mask defining the field's length and position, must be * non-zero * @val: value to put in the field * * Return: field value masked and shifted to its final destination * * field_prep() masks and shifts up the value. The result should be * combined with other fields of the bitfield using logical OR. * Unlike FIELD_PREP(), @mask is not limited to a compile-time constant. * Typical usage patterns are a value stored in a table, or calculated by * shifting a constant by a variable number of bits. * If you want to ensure that @mask is a compile-time constant, please use * FIELD_PREP() directly instead. */ #define field_prep(mask, val) \ (__builtin_constant_p(mask) ? __FIELD_PREP(mask, val, "field_prep: ") \ : __field_prep(mask, val)) /** * field_get() - extract a bitfield element * @mask: shifted mask defining the field's length and position, must be * non-zero * @reg: value of entire bitfield * * Return: extracted field value * * field_get() extracts the field specified by @mask from the * bitfield passed in as @reg by masking and shifting it down. * Unlike FIELD_GET(), @mask is not limited to a compile-time constant. * Typical usage patterns are a value stored in a table, or calculated by * shifting a constant by a variable number of bits. * If you want to ensure that @mask is a compile-time constant, please use * FIELD_GET() directly instead. */ #define field_get(mask, reg) \ (__builtin_constant_p(mask) ? __FIELD_GET(mask, reg, "field_get: ") \ : __field_get(mask, reg)) #endif |
| 11 11 4 3 165 218 2 126 131 68 39 34 36 35 38 16 10 12 5 5 5 42 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 | // SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2000-2005 Silicon Graphics, Inc. * All Rights Reserved. */ #ifndef __XFS_DQUOT_H__ #define __XFS_DQUOT_H__ /* * Dquots are structures that hold quota information about a user or a group, * much like inodes are for files. In fact, dquots share many characteristics * with inodes. However, dquots can also be a centralized resource, relative * to a collection of inodes. In this respect, dquots share some characteristics * of the superblock. * XFS dquots exploit both those in its algorithms. They make every attempt * to not be a bottleneck when quotas are on and have minimal impact, if any, * when quotas are off. */ struct xfs_mount; struct xfs_trans; enum { XFS_QLOWSP_1_PCNT = 0, XFS_QLOWSP_3_PCNT, XFS_QLOWSP_5_PCNT, XFS_QLOWSP_MAX }; struct xfs_dquot_res { /* Total resources allocated and reserved. */ xfs_qcnt_t reserved; /* Total resources allocated. */ xfs_qcnt_t count; /* Absolute and preferred limits. */ xfs_qcnt_t hardlimit; xfs_qcnt_t softlimit; /* * For root dquots, this is the default grace period, in seconds. * Otherwise, this is when the quota grace period expires, * in seconds since the Unix epoch. */ time64_t timer; }; static inline bool xfs_dquot_res_over_limits( const struct xfs_dquot_res *qres) { if ((qres->softlimit && qres->softlimit < qres->reserved) || (qres->hardlimit && qres->hardlimit < qres->reserved)) return true; return false; } struct xfs_dquot_pre { xfs_qcnt_t q_prealloc_lo_wmark; xfs_qcnt_t q_prealloc_hi_wmark; int64_t q_low_space[XFS_QLOWSP_MAX]; }; /* * The incore dquot structure */ struct xfs_dquot { struct list_head q_lru; struct xfs_mount *q_mount; xfs_dqtype_t q_type; uint16_t q_flags; xfs_dqid_t q_id; struct lockref q_lockref; int q_bufoffset; xfs_daddr_t q_blkno; xfs_fileoff_t q_fileoffset; struct xfs_dquot_res q_blk; /* regular blocks */ struct xfs_dquot_res q_ino; /* inodes */ struct xfs_dquot_res q_rtb; /* realtime blocks */ struct xfs_dq_logitem q_logitem; struct xfs_dquot_pre q_blk_prealloc; struct xfs_dquot_pre q_rtb_prealloc; struct mutex q_qlock; struct completion q_flush; atomic_t q_pincount; struct wait_queue_head q_pinwait; }; /* * Lock hierarchy for q_qlock: * XFS_QLOCK_NORMAL is the implicit default, * XFS_QLOCK_NESTED is the dquot with the higher id in xfs_dqlock2 */ enum { XFS_QLOCK_NORMAL = 0, XFS_QLOCK_NESTED, }; /* * Manage the q_flush completion queue embedded in the dquot. This completion * queue synchronizes processes attempting to flush the in-core dquot back to * disk. */ static inline void xfs_dqflock(struct xfs_dquot *dqp) { wait_for_completion(&dqp->q_flush); } static inline bool xfs_dqflock_nowait(struct xfs_dquot *dqp) { return try_wait_for_completion(&dqp->q_flush); } static inline void xfs_dqfunlock(struct xfs_dquot *dqp) { complete(&dqp->q_flush); } static inline int xfs_dquot_type(const struct xfs_dquot *dqp) { return dqp->q_type & XFS_DQTYPE_REC_MASK; } static inline int xfs_this_quota_on(struct xfs_mount *mp, xfs_dqtype_t type) { switch (type) { case XFS_DQTYPE_USER: return XFS_IS_UQUOTA_ON(mp); case XFS_DQTYPE_GROUP: return XFS_IS_GQUOTA_ON(mp); case XFS_DQTYPE_PROJ: return XFS_IS_PQUOTA_ON(mp); default: return 0; } } static inline struct xfs_dquot *xfs_inode_dquot( struct xfs_inode *ip, xfs_dqtype_t type) { if (xfs_is_metadir_inode(ip)) return NULL; switch (type) { case XFS_DQTYPE_USER: return ip->i_udquot; case XFS_DQTYPE_GROUP: return ip->i_gdquot; case XFS_DQTYPE_PROJ: return ip->i_pdquot; default: return NULL; } } /* Decide if the dquot's limits are actually being enforced. */ static inline bool xfs_dquot_is_enforced( const struct xfs_dquot *dqp) { switch (xfs_dquot_type(dqp)) { case XFS_DQTYPE_USER: return XFS_IS_UQUOTA_ENFORCED(dqp->q_mount); case XFS_DQTYPE_GROUP: return XFS_IS_GQUOTA_ENFORCED(dqp->q_mount); case XFS_DQTYPE_PROJ: return XFS_IS_PQUOTA_ENFORCED(dqp->q_mount); } ASSERT(0); return false; } /* * Check whether a dquot is under low free space conditions. We assume the quota * is enabled and enforced. */ static inline bool xfs_dquot_lowsp(struct xfs_dquot *dqp) { int64_t freesp; freesp = dqp->q_blk.hardlimit - dqp->q_blk.reserved; if (freesp < dqp->q_blk_prealloc.q_low_space[XFS_QLOWSP_1_PCNT]) return true; freesp = dqp->q_rtb.hardlimit - dqp->q_rtb.reserved; if (freesp < dqp->q_rtb_prealloc.q_low_space[XFS_QLOWSP_1_PCNT]) return true; return false; } void xfs_dquot_to_disk(struct xfs_disk_dquot *ddqp, struct xfs_dquot *dqp); #define XFS_DQ_IS_LOCKED(dqp) (mutex_is_locked(&((dqp)->q_qlock))) #define XFS_DQ_IS_DIRTY(dqp) ((dqp)->q_flags & XFS_DQFLAG_DIRTY) void xfs_qm_dqdestroy(struct xfs_dquot *dqp); int xfs_qm_dqflush(struct xfs_dquot *dqp, struct xfs_buf *bp); void xfs_qm_dqunpin_wait(struct xfs_dquot *dqp); void xfs_qm_adjust_dqtimers(struct xfs_dquot *d); void xfs_qm_adjust_dqlimits(struct xfs_dquot *d); xfs_dqid_t xfs_qm_id_for_quotatype(struct xfs_inode *ip, xfs_dqtype_t type); int xfs_qm_dqget(struct xfs_mount *mp, xfs_dqid_t id, xfs_dqtype_t type, bool can_alloc, struct xfs_dquot **dqpp); int xfs_qm_dqget_inode(struct xfs_inode *ip, xfs_dqtype_t type, bool can_alloc, struct xfs_dquot **dqpp); int xfs_qm_dqget_next(struct xfs_mount *mp, xfs_dqid_t id, xfs_dqtype_t type, struct xfs_dquot **dqpp); int xfs_qm_dqget_uncached(struct xfs_mount *mp, xfs_dqid_t id, xfs_dqtype_t type, struct xfs_dquot **dqpp); void xfs_dqlock2(struct xfs_dquot *, struct xfs_dquot *); void xfs_dqlockn(struct xfs_dqtrx *q); void xfs_dquot_set_prealloc_limits(struct xfs_dquot *); int xfs_dquot_attach_buf(struct xfs_trans *tp, struct xfs_dquot *dqp); int xfs_dquot_use_attached_buf(struct xfs_dquot *dqp, struct xfs_buf **bpp); void xfs_dquot_detach_buf(struct xfs_dquot *dqp); static inline struct xfs_dquot *xfs_qm_dqhold(struct xfs_dquot *dqp) { lockref_get(&dqp->q_lockref); return dqp; } time64_t xfs_dquot_set_timeout(struct xfs_mount *mp, time64_t timeout); time64_t xfs_dquot_set_grace_period(time64_t grace); void xfs_qm_init_dquot_blk(struct xfs_trans *tp, xfs_dqid_t id, xfs_dqtype_t type, struct xfs_buf *bp); #endif /* __XFS_DQUOT_H__ */ |
| 93 8 1 1 1 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 | /* SPDX-License-Identifier: GPL-2.0 */ #ifndef _KBD_KERN_H #define _KBD_KERN_H #include <linux/tty.h> #include <linux/interrupt.h> #include <linux/keyboard.h> extern char *func_table[MAX_NR_FUNC]; /* * kbd->xxx contains the VC-local things (flag settings etc..) * * Note: externally visible are LED_SCR, LED_NUM, LED_CAP defined in kd.h * The code in KDGETLED / KDSETLED depends on the internal and * external order being the same. * * Note: lockstate is used as index in the array key_map. */ struct kbd_struct { unsigned char lockstate; /* 8 modifiers - the names do not have any meaning at all; they can be associated to arbitrarily chosen keys */ #define VC_SHIFTLOCK KG_SHIFT /* shift lock mode */ #define VC_ALTGRLOCK KG_ALTGR /* altgr lock mode */ #define VC_CTRLLOCK KG_CTRL /* control lock mode */ #define VC_ALTLOCK KG_ALT /* alt lock mode */ #define VC_SHIFTLLOCK KG_SHIFTL /* shiftl lock mode */ #define VC_SHIFTRLOCK KG_SHIFTR /* shiftr lock mode */ #define VC_CTRLLLOCK KG_CTRLL /* ctrll lock mode */ #define VC_CTRLRLOCK KG_CTRLR /* ctrlr lock mode */ unsigned char slockstate; /* for `sticky' Shift, Ctrl, etc. */ unsigned char ledmode:1; #define LED_SHOW_FLAGS 0 /* traditional state */ #define LED_SHOW_IOCTL 1 /* only change leds upon ioctl */ unsigned char ledflagstate:4; /* flags, not lights */ unsigned char default_ledflagstate:4; #define VC_SCROLLOCK 0 /* scroll-lock mode */ #define VC_NUMLOCK 1 /* numeric lock mode */ #define VC_CAPSLOCK 2 /* capslock mode */ #define VC_KANALOCK 3 /* kanalock mode */ unsigned char kbdmode:3; /* one 3-bit value */ #define VC_XLATE 0 /* translate keycodes using keymap */ #define VC_MEDIUMRAW 1 /* medium raw (keycode) mode */ #define VC_RAW 2 /* raw (scancode) mode */ #define VC_UNICODE 3 /* Unicode mode */ #define VC_OFF 4 /* disabled mode */ unsigned char modeflags:5; #define VC_APPLIC 0 /* application key mode */ #define VC_CKMODE 1 /* cursor key mode */ #define VC_REPEAT 2 /* keyboard repeat */ #define VC_CRLF 3 /* 0 - enter sends CR, 1 - enter sends CRLF */ #define VC_META 4 /* 0 - meta, 1 - meta=prefix with ESC */ }; extern int kbd_init(void); extern void setledstate(struct kbd_struct *kbd, unsigned int led); extern int do_poke_blanked_console; extern void (*kbd_ledfunc)(unsigned int led); extern int set_console(int nr); extern void schedule_console_callback(void); static inline int vc_kbd_mode(struct kbd_struct * kbd, int flag) { return ((kbd->modeflags >> flag) & 1); } static inline int vc_kbd_led(struct kbd_struct * kbd, int flag) { return ((kbd->ledflagstate >> flag) & 1); } static inline void set_vc_kbd_mode(struct kbd_struct * kbd, int flag) { kbd->modeflags |= 1 << flag; } static inline void set_vc_kbd_led(struct kbd_struct * kbd, int flag) { kbd->ledflagstate |= 1 << flag; } static inline void clr_vc_kbd_mode(struct kbd_struct * kbd, int flag) { kbd->modeflags &= ~(1 << flag); } static inline void clr_vc_kbd_led(struct kbd_struct * kbd, int flag) { kbd->ledflagstate &= ~(1 << flag); } static inline void chg_vc_kbd_lock(struct kbd_struct * kbd, int flag) { kbd->lockstate ^= 1 << flag; } static inline void chg_vc_kbd_slock(struct kbd_struct * kbd, int flag) { kbd->slockstate ^= 1 << flag; } static inline void chg_vc_kbd_mode(struct kbd_struct * kbd, int flag) { kbd->modeflags ^= 1 << flag; } static inline void chg_vc_kbd_led(struct kbd_struct * kbd, int flag) { kbd->ledflagstate ^= 1 << flag; } #define U(x) ((x) ^ 0xf000) #define BRL_UC_ROW 0x2800 /* keyboard.c */ struct console; void vt_set_leds_compute_shiftstate(void); /* defkeymap.c */ extern unsigned int keymap_count; #endif |
| 4 1 4 7 5 5 3 2 3 4 4 2 2 1 8 8 4 4 5 4 3 1 1 1 4 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 | // SPDX-License-Identifier: GPL-2.0 #include <linux/kernel.h> #include <linux/errno.h> #include <linux/fs.h> #include <linux/file.h> #include <linux/mm.h> #include <linux/slab.h> #include <linux/namei.h> #include <linux/io_uring.h> #include <linux/xattr.h> #include <uapi/linux/io_uring.h> #include "../fs/internal.h" #include "io_uring.h" #include "xattr.h" struct io_xattr { struct file *file; struct kernel_xattr_ctx ctx; struct filename *filename; }; void io_xattr_cleanup(struct io_kiocb *req) { struct io_xattr *ix = io_kiocb_to_cmd(req, struct io_xattr); if (ix->filename) putname(ix->filename); kfree(ix->ctx.kname); kvfree(ix->ctx.kvalue); } static void io_xattr_finish(struct io_kiocb *req, int ret) { req->flags &= ~REQ_F_NEED_CLEANUP; io_xattr_cleanup(req); io_req_set_res(req, ret, 0); } static int __io_getxattr_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) { struct io_xattr *ix = io_kiocb_to_cmd(req, struct io_xattr); const char __user *name; int ret; ix->filename = NULL; ix->ctx.kvalue = NULL; name = u64_to_user_ptr(READ_ONCE(sqe->addr)); ix->ctx.value = u64_to_user_ptr(READ_ONCE(sqe->addr2)); ix->ctx.size = READ_ONCE(sqe->len); ix->ctx.flags = READ_ONCE(sqe->xattr_flags); if (ix->ctx.flags) return -EINVAL; ix->ctx.kname = kmalloc(sizeof(*ix->ctx.kname), GFP_KERNEL); if (!ix->ctx.kname) return -ENOMEM; ret = import_xattr_name(ix->ctx.kname, name); if (ret) { kfree(ix->ctx.kname); return ret; } req->flags |= REQ_F_NEED_CLEANUP; req->flags |= REQ_F_FORCE_ASYNC; return 0; } int io_fgetxattr_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) { return __io_getxattr_prep(req, sqe); } int io_getxattr_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) { struct io_xattr *ix = io_kiocb_to_cmd(req, struct io_xattr); const char __user *path; int ret; if (unlikely(req->flags & REQ_F_FIXED_FILE)) return -EBADF; ret = __io_getxattr_prep(req, sqe); if (ret) return ret; path = u64_to_user_ptr(READ_ONCE(sqe->addr3)); ix->filename = getname(path); if (IS_ERR(ix->filename)) return PTR_ERR(ix->filename); return 0; } int io_fgetxattr(struct io_kiocb *req, unsigned int issue_flags) { struct io_xattr *ix = io_kiocb_to_cmd(req, struct io_xattr); int ret; WARN_ON_ONCE(issue_flags & IO_URING_F_NONBLOCK); ret = file_getxattr(req->file, &ix->ctx); io_xattr_finish(req, ret); return IOU_COMPLETE; } int io_getxattr(struct io_kiocb *req, unsigned int issue_flags) { struct io_xattr *ix = io_kiocb_to_cmd(req, struct io_xattr); int ret; WARN_ON_ONCE(issue_flags & IO_URING_F_NONBLOCK); ret = filename_getxattr(AT_FDCWD, ix->filename, LOOKUP_FOLLOW, &ix->ctx); ix->filename = NULL; io_xattr_finish(req, ret); return IOU_COMPLETE; } static int __io_setxattr_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) { struct io_xattr *ix = io_kiocb_to_cmd(req, struct io_xattr); const char __user *name; int ret; ix->filename = NULL; name = u64_to_user_ptr(READ_ONCE(sqe->addr)); ix->ctx.cvalue = u64_to_user_ptr(READ_ONCE(sqe->addr2)); ix->ctx.kvalue = NULL; ix->ctx.size = READ_ONCE(sqe->len); ix->ctx.flags = READ_ONCE(sqe->xattr_flags); ix->ctx.kname = kmalloc(sizeof(*ix->ctx.kname), GFP_KERNEL); if (!ix->ctx.kname) return -ENOMEM; ret = setxattr_copy(name, &ix->ctx); if (ret) { kfree(ix->ctx.kname); return ret; } req->flags |= REQ_F_NEED_CLEANUP; req->flags |= REQ_F_FORCE_ASYNC; return 0; } int io_setxattr_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) { struct io_xattr *ix = io_kiocb_to_cmd(req, struct io_xattr); const char __user *path; int ret; if (unlikely(req->flags & REQ_F_FIXED_FILE)) return -EBADF; ret = __io_setxattr_prep(req, sqe); if (ret) return ret; path = u64_to_user_ptr(READ_ONCE(sqe->addr3)); ix->filename = getname(path); if (IS_ERR(ix->filename)) return PTR_ERR(ix->filename); return 0; } int io_fsetxattr_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) { return __io_setxattr_prep(req, sqe); } int io_fsetxattr(struct io_kiocb *req, unsigned int issue_flags) { struct io_xattr *ix = io_kiocb_to_cmd(req, struct io_xattr); int ret; WARN_ON_ONCE(issue_flags & IO_URING_F_NONBLOCK); ret = file_setxattr(req->file, &ix->ctx); io_xattr_finish(req, ret); return IOU_COMPLETE; } int io_setxattr(struct io_kiocb *req, unsigned int issue_flags) { struct io_xattr *ix = io_kiocb_to_cmd(req, struct io_xattr); int ret; WARN_ON_ONCE(issue_flags & IO_URING_F_NONBLOCK); ret = filename_setxattr(AT_FDCWD, ix->filename, LOOKUP_FOLLOW, &ix->ctx); ix->filename = NULL; io_xattr_finish(req, ret); return IOU_COMPLETE; } |
| 5 4 4 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 | /* SPDX-License-Identifier: GPL-2.0-or-later */ /* * SM3 Secure Hash Algorithm, AVX assembler accelerated. * specified in: https://datatracker.ietf.org/doc/html/draft-sca-cfrg-sm3-02 * * Copyright (C) 2021 Tianjia Zhang <tianjia.zhang@linux.alibaba.com> */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <crypto/internal/hash.h> #include <crypto/internal/simd.h> #include <crypto/sm3.h> #include <crypto/sm3_base.h> #include <linux/cpufeature.h> #include <linux/kernel.h> #include <linux/module.h> asmlinkage void sm3_transform_avx(struct sm3_state *state, const u8 *data, int nblocks); static int sm3_avx_update(struct shash_desc *desc, const u8 *data, unsigned int len) { int remain; /* * Make sure struct sm3_state begins directly with the SM3 * 256-bit internal state, as this is what the asm functions expect. */ BUILD_BUG_ON(offsetof(struct sm3_state, state) != 0); kernel_fpu_begin(); remain = sm3_base_do_update_blocks(desc, data, len, sm3_transform_avx); kernel_fpu_end(); return remain; } static int sm3_avx_finup(struct shash_desc *desc, const u8 *data, unsigned int len, u8 *out) { kernel_fpu_begin(); sm3_base_do_finup(desc, data, len, sm3_transform_avx); kernel_fpu_end(); return sm3_base_finish(desc, out); } static struct shash_alg sm3_avx_alg = { .digestsize = SM3_DIGEST_SIZE, .init = sm3_base_init, .update = sm3_avx_update, .finup = sm3_avx_finup, .descsize = SM3_STATE_SIZE, .base = { .cra_name = "sm3", .cra_driver_name = "sm3-avx", .cra_priority = 300, .cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY | CRYPTO_AHASH_ALG_FINUP_MAX, .cra_blocksize = SM3_BLOCK_SIZE, .cra_module = THIS_MODULE, } }; static int __init sm3_avx_mod_init(void) { const char *feature_name; if (!boot_cpu_has(X86_FEATURE_AVX)) { pr_info("AVX instruction are not detected.\n"); return -ENODEV; } if (!boot_cpu_has(X86_FEATURE_BMI2)) { pr_info("BMI2 instruction are not detected.\n"); return -ENODEV; } if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, &feature_name)) { pr_info("CPU feature '%s' is not supported.\n", feature_name); return -ENODEV; } return crypto_register_shash(&sm3_avx_alg); } static void __exit sm3_avx_mod_exit(void) { crypto_unregister_shash(&sm3_avx_alg); } module_init(sm3_avx_mod_init); module_exit(sm3_avx_mod_exit); MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Tianjia Zhang <tianjia.zhang@linux.alibaba.com>"); MODULE_DESCRIPTION("SM3 Secure Hash Algorithm, AVX assembler accelerated"); MODULE_ALIAS_CRYPTO("sm3"); MODULE_ALIAS_CRYPTO("sm3-avx"); |
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1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 | // SPDX-License-Identifier: GPL-2.0-only /* * linux/kernel/ptrace.c * * (C) Copyright 1999 Linus Torvalds * * Common interfaces for "ptrace()" which we do not want * to continually duplicate across every architecture. */ #include <linux/capability.h> #include <linux/export.h> #include <linux/sched.h> #include <linux/sched/mm.h> #include <linux/sched/coredump.h> #include <linux/sched/task.h> #include <linux/errno.h> #include <linux/mm.h> #include <linux/highmem.h> #include <linux/pagemap.h> #include <linux/ptrace.h> #include <linux/security.h> #include <linux/signal.h> #include <linux/uio.h> #include <linux/audit.h> #include <linux/pid_namespace.h> #include <linux/syscalls.h> #include <linux/uaccess.h> #include <linux/regset.h> #include <linux/hw_breakpoint.h> #include <linux/cn_proc.h> #include <linux/compat.h> #include <linux/sched/signal.h> #include <linux/minmax.h> #include <linux/syscall_user_dispatch.h> #include <asm/syscall.h> /* for syscall_get_* */ /* * Access another process' address space via ptrace. * Source/target buffer must be kernel space, * Do not walk the page table directly, use get_user_pages */ int ptrace_access_vm(struct task_struct *tsk, unsigned long addr, void *buf, int len, unsigned int gup_flags) { struct mm_struct *mm; int ret; mm = get_task_mm(tsk); if (!mm) return 0; if (!tsk->ptrace || (current != tsk->parent) || ((get_dumpable(mm) != SUID_DUMP_USER) && !ptracer_capable(tsk, mm->user_ns))) { mmput(mm); return 0; } ret = access_remote_vm(mm, addr, buf, len, gup_flags); mmput(mm); return ret; } void __ptrace_link(struct task_struct *child, struct task_struct *new_parent, const struct cred *ptracer_cred) { BUG_ON(!list_empty(&child->ptrace_entry)); list_add(&child->ptrace_entry, &new_parent->ptraced); child->parent = new_parent; child->ptracer_cred = get_cred(ptracer_cred); } /* * ptrace a task: make the debugger its new parent and * move it to the ptrace list. * * Must be called with the tasklist lock write-held. */ static void ptrace_link(struct task_struct *child, struct task_struct *new_parent) { __ptrace_link(child, new_parent, current_cred()); } /** * __ptrace_unlink - unlink ptracee and restore its execution state * @child: ptracee to be unlinked * * Remove @child from the ptrace list, move it back to the original parent, * and restore the execution state so that it conforms to the group stop * state. * * Unlinking can happen via two paths - explicit PTRACE_DETACH or ptracer * exiting. For PTRACE_DETACH, unless the ptracee has been killed between * ptrace_check_attach() and here, it's guaranteed to be in TASK_TRACED. * If the ptracer is exiting, the ptracee can be in any state. * * After detach, the ptracee should be in a state which conforms to the * group stop. If the group is stopped or in the process of stopping, the * ptracee should be put into TASK_STOPPED; otherwise, it should be woken * up from TASK_TRACED. * * If the ptracee is in TASK_TRACED and needs to be moved to TASK_STOPPED, * it goes through TRACED -> RUNNING -> STOPPED transition which is similar * to but in the opposite direction of what happens while attaching to a * stopped task. However, in this direction, the intermediate RUNNING * state is not hidden even from the current ptracer and if it immediately * re-attaches and performs a WNOHANG wait(2), it may fail. * * CONTEXT: * write_lock_irq(tasklist_lock) */ void __ptrace_unlink(struct task_struct *child) { const struct cred *old_cred; BUG_ON(!child->ptrace); clear_task_syscall_work(child, SYSCALL_TRACE); #if defined(CONFIG_GENERIC_ENTRY) || defined(TIF_SYSCALL_EMU) clear_task_syscall_work(child, SYSCALL_EMU); #endif child->parent = child->real_parent; list_del_init(&child->ptrace_entry); old_cred = child->ptracer_cred; child->ptracer_cred = NULL; put_cred(old_cred); spin_lock(&child->sighand->siglock); child->ptrace = 0; /* * Clear all pending traps and TRAPPING. TRAPPING should be * cleared regardless of JOBCTL_STOP_PENDING. Do it explicitly. */ task_clear_jobctl_pending(child, JOBCTL_TRAP_MASK); task_clear_jobctl_trapping(child); /* * Reinstate JOBCTL_STOP_PENDING if group stop is in effect and * @child isn't dead. */ if (!(child->flags & PF_EXITING) && (child->signal->flags & SIGNAL_STOP_STOPPED || child->signal->group_stop_count)) child->jobctl |= JOBCTL_STOP_PENDING; /* * If transition to TASK_STOPPED is pending or in TASK_TRACED, kick * @child in the butt. Note that @resume should be used iff @child * is in TASK_TRACED; otherwise, we might unduly disrupt * TASK_KILLABLE sleeps. */ if (child->jobctl & JOBCTL_STOP_PENDING || task_is_traced(child)) ptrace_signal_wake_up(child, true); spin_unlock(&child->sighand->siglock); } static bool looks_like_a_spurious_pid(struct task_struct *task) { if (task->exit_code != ((PTRACE_EVENT_EXEC << 8) | SIGTRAP)) return false; if (task_pid_vnr(task) == task->ptrace_message) return false; /* * The tracee changed its pid but the PTRACE_EVENT_EXEC event * was not wait()'ed, most probably debugger targets the old * leader which was destroyed in de_thread(). */ return true; } /* * Ensure that nothing can wake it up, even SIGKILL * * A task is switched to this state while a ptrace operation is in progress; * such that the ptrace operation is uninterruptible. */ static bool ptrace_freeze_traced(struct task_struct *task) { bool ret = false; /* Lockless, nobody but us can set this flag */ if (task->jobctl & JOBCTL_LISTENING) return ret; spin_lock_irq(&task->sighand->siglock); if (task_is_traced(task) && !looks_like_a_spurious_pid(task) && !__fatal_signal_pending(task)) { task->jobctl |= JOBCTL_PTRACE_FROZEN; ret = true; } spin_unlock_irq(&task->sighand->siglock); return ret; } static void ptrace_unfreeze_traced(struct task_struct *task) { unsigned long flags; /* * The child may be awake and may have cleared * JOBCTL_PTRACE_FROZEN (see ptrace_resume). The child will * not set JOBCTL_PTRACE_FROZEN or enter __TASK_TRACED anew. */ if (lock_task_sighand(task, &flags)) { task->jobctl &= ~JOBCTL_PTRACE_FROZEN; if (__fatal_signal_pending(task)) { task->jobctl &= ~JOBCTL_TRACED; wake_up_state(task, __TASK_TRACED); } unlock_task_sighand(task, &flags); } } /** * ptrace_check_attach - check whether ptracee is ready for ptrace operation * @child: ptracee to check for * @ignore_state: don't check whether @child is currently %TASK_TRACED * * Check whether @child is being ptraced by %current and ready for further * ptrace operations. If @ignore_state is %false, @child also should be in * %TASK_TRACED state and on return the child is guaranteed to be traced * and not executing. If @ignore_state is %true, @child can be in any * state. * * CONTEXT: * Grabs and releases tasklist_lock and @child->sighand->siglock. * * RETURNS: * 0 on success, -ESRCH if %child is not ready. */ static int ptrace_check_attach(struct task_struct *child, bool ignore_state) { int ret = -ESRCH; /* * We take the read lock around doing both checks to close a * possible race where someone else was tracing our child and * detached between these two checks. After this locked check, * we are sure that this is our traced child and that can only * be changed by us so it's not changing right after this. */ read_lock(&tasklist_lock); if (child->ptrace && child->parent == current) { /* * child->sighand can't be NULL, release_task() * does ptrace_unlink() before __exit_signal(). */ if (ignore_state || ptrace_freeze_traced(child)) ret = 0; } read_unlock(&tasklist_lock); if (!ret && !ignore_state && WARN_ON_ONCE(!wait_task_inactive(child, __TASK_TRACED|TASK_FROZEN))) ret = -ESRCH; return ret; } static bool ptrace_has_cap(struct user_namespace *ns, unsigned int mode) { if (mode & PTRACE_MODE_NOAUDIT) return ns_capable_noaudit(ns, CAP_SYS_PTRACE); return ns_capable(ns, CAP_SYS_PTRACE); } /* Returns 0 on success, -errno on denial. */ static int __ptrace_may_access(struct task_struct *task, unsigned int mode) { const struct cred *cred = current_cred(), *tcred; struct mm_struct *mm; kuid_t caller_uid; kgid_t caller_gid; if (!(mode & PTRACE_MODE_FSCREDS) == !(mode & PTRACE_MODE_REALCREDS)) { WARN(1, "denying ptrace access check without PTRACE_MODE_*CREDS\n"); return -EPERM; } /* May we inspect the given task? * This check is used both for attaching with ptrace * and for allowing access to sensitive information in /proc. * * ptrace_attach denies several cases that /proc allows * because setting up the necessary parent/child relationship * or halting the specified task is impossible. */ /* Don't let security modules deny introspection */ if (same_thread_group(task, current)) return 0; rcu_read_lock(); if (mode & PTRACE_MODE_FSCREDS) { caller_uid = cred->fsuid; caller_gid = cred->fsgid; } else { /* * Using the euid would make more sense here, but something * in userland might rely on the old behavior, and this * shouldn't be a security problem since * PTRACE_MODE_REALCREDS implies that the caller explicitly * used a syscall that requests access to another process * (and not a filesystem syscall to procfs). */ caller_uid = cred->uid; caller_gid = cred->gid; } tcred = __task_cred(task); if (uid_eq(caller_uid, tcred->euid) && uid_eq(caller_uid, tcred->suid) && uid_eq(caller_uid, tcred->uid) && gid_eq(caller_gid, tcred->egid) && gid_eq(caller_gid, tcred->sgid) && gid_eq(caller_gid, tcred->gid)) goto ok; if (ptrace_has_cap(tcred->user_ns, mode)) goto ok; rcu_read_unlock(); return -EPERM; ok: rcu_read_unlock(); /* * If a task drops privileges and becomes nondumpable (through a syscall * like setresuid()) while we are trying to access it, we must ensure * that the dumpability is read after the credentials; otherwise, * we may be able to attach to a task that we shouldn't be able to * attach to (as if the task had dropped privileges without becoming * nondumpable). * Pairs with a write barrier in commit_creds(). */ smp_rmb(); mm = task->mm; if (mm && ((get_dumpable(mm) != SUID_DUMP_USER) && !ptrace_has_cap(mm->user_ns, mode))) return -EPERM; return security_ptrace_access_check(task, mode); } bool ptrace_may_access(struct task_struct *task, unsigned int mode) { int err; task_lock(task); err = __ptrace_may_access(task, mode); task_unlock(task); return !err; } static int check_ptrace_options(unsigned long data) { if (data & ~(unsigned long)PTRACE_O_MASK) return -EINVAL; if (unlikely(data & PTRACE_O_SUSPEND_SECCOMP)) { if (!IS_ENABLED(CONFIG_CHECKPOINT_RESTORE) || !IS_ENABLED(CONFIG_SECCOMP)) return -EINVAL; if (!capable(CAP_SYS_ADMIN)) return -EPERM; if (seccomp_mode(¤t->seccomp) != SECCOMP_MODE_DISABLED || current->ptrace & PT_SUSPEND_SECCOMP) return -EPERM; } return 0; } static inline void ptrace_set_stopped(struct task_struct *task, bool seize) { guard(spinlock)(&task->sighand->siglock); /* SEIZE doesn't trap tracee on attach */ if (!seize) send_signal_locked(SIGSTOP, SEND_SIG_PRIV, task, PIDTYPE_PID); /* * If the task is already STOPPED, set JOBCTL_TRAP_STOP and * TRAPPING, and kick it so that it transits to TRACED. TRAPPING * will be cleared if the child completes the transition or any * event which clears the group stop states happens. We'll wait * for the transition to complete before returning from this * function. * * This hides STOPPED -> RUNNING -> TRACED transition from the * attaching thread but a different thread in the same group can * still observe the transient RUNNING state. IOW, if another * thread's WNOHANG wait(2) on the stopped tracee races against * ATTACH, the wait(2) may fail due to the transient RUNNING. * * The following task_is_stopped() test is safe as both transitions * in and out of STOPPED are protected by siglock. */ if (task_is_stopped(task) && task_set_jobctl_pending(task, JOBCTL_TRAP_STOP | JOBCTL_TRAPPING)) { task->jobctl &= ~JOBCTL_STOPPED; signal_wake_up_state(task, __TASK_STOPPED); } } static int ptrace_attach(struct task_struct *task, long request, unsigned long addr, unsigned long flags) { bool seize = (request == PTRACE_SEIZE); int retval; if (seize) { if (addr != 0) return -EIO; /* * This duplicates the check in check_ptrace_options() because * ptrace_attach() and ptrace_setoptions() have historically * used different error codes for unknown ptrace options. */ if (flags & ~(unsigned long)PTRACE_O_MASK) return -EIO; retval = check_ptrace_options(flags); if (retval) return retval; flags = PT_PTRACED | PT_SEIZED | (flags << PT_OPT_FLAG_SHIFT); } else { flags = PT_PTRACED; } audit_ptrace(task); if (unlikely(task->flags & PF_KTHREAD)) return -EPERM; if (same_thread_group(task, current)) return -EPERM; /* * Protect exec's credential calculations against our interference; * SUID, SGID and LSM creds get determined differently * under ptrace. */ scoped_cond_guard (mutex_intr, return -ERESTARTNOINTR, &task->signal->cred_guard_mutex) { scoped_guard (task_lock, task) { retval = __ptrace_may_access(task, PTRACE_MODE_ATTACH_REALCREDS); if (retval) return retval; } scoped_guard (write_lock_irq, &tasklist_lock) { if (unlikely(task->exit_state)) return -EPERM; if (task->ptrace) return -EPERM; task->ptrace = flags; ptrace_link(task, current); ptrace_set_stopped(task, seize); } } /* * We do not bother to change retval or clear JOBCTL_TRAPPING * if wait_on_bit() was interrupted by SIGKILL. The tracer will * not return to user-mode, it will exit and clear this bit in * __ptrace_unlink() if it wasn't already cleared by the tracee; * and until then nobody can ptrace this task. */ wait_on_bit(&task->jobctl, JOBCTL_TRAPPING_BIT, TASK_KILLABLE); proc_ptrace_connector(task, PTRACE_ATTACH); return 0; } /** * ptrace_traceme -- helper for PTRACE_TRACEME * * Performs checks and sets PT_PTRACED. * Should be used by all ptrace implementations for PTRACE_TRACEME. */ static int ptrace_traceme(void) { int ret = -EPERM; write_lock_irq(&tasklist_lock); /* Are we already being traced? */ if (!current->ptrace) { ret = security_ptrace_traceme(current->parent); /* * Check PF_EXITING to ensure ->real_parent has not passed * exit_ptrace(). Otherwise we don't report the error but * pretend ->real_parent untraces us right after return. */ if (!ret && !(current->real_parent->flags & PF_EXITING)) { current->ptrace = PT_PTRACED; ptrace_link(current, current->real_parent); } } write_unlock_irq(&tasklist_lock); return ret; } /* * Called with irqs disabled, returns true if childs should reap themselves. */ static int ignoring_children(struct sighand_struct *sigh) { int ret; spin_lock(&sigh->siglock); ret = (sigh->action[SIGCHLD-1].sa.sa_handler == SIG_IGN) || (sigh->action[SIGCHLD-1].sa.sa_flags & SA_NOCLDWAIT); spin_unlock(&sigh->siglock); return ret; } /* * Called with tasklist_lock held for writing. * Unlink a traced task, and clean it up if it was a traced zombie. * Return true if it needs to be reaped with release_task(). * (We can't call release_task() here because we already hold tasklist_lock.) * * If it's a zombie, our attachedness prevented normal parent notification * or self-reaping. Do notification now if it would have happened earlier. * If it should reap itself, return true. * * If it's our own child, there is no notification to do. But if our normal * children self-reap, then this child was prevented by ptrace and we must * reap it now, in that case we must also wake up sub-threads sleeping in * do_wait(). */ static bool __ptrace_detach(struct task_struct *tracer, struct task_struct *p) { bool dead; __ptrace_unlink(p); if (p->exit_state != EXIT_ZOMBIE) return false; dead = !thread_group_leader(p); if (!dead && thread_group_empty(p)) { if (!same_thread_group(p->real_parent, tracer)) dead = do_notify_parent(p, p->exit_signal); else if (ignoring_children(tracer->sighand)) { __wake_up_parent(p, tracer); dead = true; } } /* Mark it as in the process of being reaped. */ if (dead) p->exit_state = EXIT_DEAD; return dead; } static int ptrace_detach(struct task_struct *child, unsigned int data) { if (!valid_signal(data)) return -EIO; /* Architecture-specific hardware disable .. */ ptrace_disable(child); write_lock_irq(&tasklist_lock); /* * We rely on ptrace_freeze_traced(). It can't be killed and * untraced by another thread, it can't be a zombie. */ WARN_ON(!child->ptrace || child->exit_state); /* * tasklist_lock avoids the race with wait_task_stopped(), see * the comment in ptrace_resume(). */ child->exit_code = data; __ptrace_detach(current, child); write_unlock_irq(&tasklist_lock); proc_ptrace_connector(child, PTRACE_DETACH); return 0; } /* * Detach all tasks we were using ptrace on. Called with tasklist held * for writing. */ void exit_ptrace(struct task_struct *tracer, struct list_head *dead) { struct task_struct *p, *n; list_for_each_entry_safe(p, n, &tracer->ptraced, ptrace_entry) { if (unlikely(p->ptrace & PT_EXITKILL)) send_sig_info(SIGKILL, SEND_SIG_PRIV, p); if (__ptrace_detach(tracer, p)) list_add(&p->ptrace_entry, dead); } } int ptrace_readdata(struct task_struct *tsk, unsigned long src, char __user *dst, int len) { int copied = 0; while (len > 0) { char buf[128]; int this_len, retval; this_len = (len > sizeof(buf)) ? sizeof(buf) : len; retval = ptrace_access_vm(tsk, src, buf, this_len, FOLL_FORCE); if (!retval) { if (copied) break; return -EIO; } if (copy_to_user(dst, buf, retval)) return -EFAULT; copied += retval; src += retval; dst += retval; len -= retval; } return copied; } int ptrace_writedata(struct task_struct *tsk, char __user *src, unsigned long dst, int len) { int copied = 0; while (len > 0) { char buf[128]; int this_len, retval; this_len = (len > sizeof(buf)) ? sizeof(buf) : len; if (copy_from_user(buf, src, this_len)) return -EFAULT; retval = ptrace_access_vm(tsk, dst, buf, this_len, FOLL_FORCE | FOLL_WRITE); if (!retval) { if (copied) break; return -EIO; } copied += retval; src += retval; dst += retval; len -= retval; } return copied; } static int ptrace_setoptions(struct task_struct *child, unsigned long data) { unsigned flags; int ret; ret = check_ptrace_options(data); if (ret) return ret; /* Avoid intermediate state when all opts are cleared */ flags = child->ptrace; flags &= ~(PTRACE_O_MASK << PT_OPT_FLAG_SHIFT); flags |= (data << PT_OPT_FLAG_SHIFT); child->ptrace = flags; return 0; } static int ptrace_getsiginfo(struct task_struct *child, kernel_siginfo_t *info) { unsigned long flags; int error = -ESRCH; if (lock_task_sighand(child, &flags)) { error = -EINVAL; if (likely(child->last_siginfo != NULL)) { copy_siginfo(info, child->last_siginfo); error = 0; } unlock_task_sighand(child, &flags); } return error; } static int ptrace_setsiginfo(struct task_struct *child, const kernel_siginfo_t *info) { unsigned long flags; int error = -ESRCH; if (lock_task_sighand(child, &flags)) { error = -EINVAL; if (likely(child->last_siginfo != NULL)) { copy_siginfo(child->last_siginfo, info); error = 0; } unlock_task_sighand(child, &flags); } return error; } static int ptrace_peek_siginfo(struct task_struct *child, unsigned long addr, unsigned long data) { struct ptrace_peeksiginfo_args arg; struct sigpending *pending; struct sigqueue *q; int ret, i; ret = copy_from_user(&arg, (void __user *) addr, sizeof(struct ptrace_peeksiginfo_args)); if (ret) return -EFAULT; if (arg.flags & ~PTRACE_PEEKSIGINFO_SHARED) return -EINVAL; /* unknown flags */ if (arg.nr < 0) return -EINVAL; /* Ensure arg.off fits in an unsigned long */ if (arg.off > ULONG_MAX) return 0; if (arg.flags & PTRACE_PEEKSIGINFO_SHARED) pending = &child->signal->shared_pending; else pending = &child->pending; for (i = 0; i < arg.nr; ) { kernel_siginfo_t info; unsigned long off = arg.off + i; bool found = false; spin_lock_irq(&child->sighand->siglock); list_for_each_entry(q, &pending->list, list) { if (!off--) { found = true; copy_siginfo(&info, &q->info); break; } } spin_unlock_irq(&child->sighand->siglock); if (!found) /* beyond the end of the list */ break; #ifdef CONFIG_COMPAT if (unlikely(in_compat_syscall())) { compat_siginfo_t __user *uinfo = compat_ptr(data); if (copy_siginfo_to_user32(uinfo, &info)) { ret = -EFAULT; break; } } else #endif { siginfo_t __user *uinfo = (siginfo_t __user *) data; if (copy_siginfo_to_user(uinfo, &info)) { ret = -EFAULT; break; } } data += sizeof(siginfo_t); i++; if (signal_pending(current)) break; cond_resched(); } if (i > 0) return i; return ret; } #ifdef CONFIG_RSEQ static long ptrace_get_rseq_configuration(struct task_struct *task, unsigned long size, void __user *data) { struct ptrace_rseq_configuration conf = { .rseq_abi_pointer = (u64)(uintptr_t)task->rseq.usrptr, .rseq_abi_size = task->rseq.len, .signature = task->rseq.sig, .flags = 0, }; size = min_t(unsigned long, size, sizeof(conf)); if (copy_to_user(data, &conf, size)) return -EFAULT; return sizeof(conf); } #endif #define is_singlestep(request) ((request) == PTRACE_SINGLESTEP) #ifdef PTRACE_SINGLEBLOCK #define is_singleblock(request) ((request) == PTRACE_SINGLEBLOCK) #else #define is_singleblock(request) 0 #endif #ifdef PTRACE_SYSEMU #define is_sysemu_singlestep(request) ((request) == PTRACE_SYSEMU_SINGLESTEP) #else #define is_sysemu_singlestep(request) 0 #endif static int ptrace_resume(struct task_struct *child, long request, unsigned long data) { if (!valid_signal(data)) return -EIO; if (request == PTRACE_SYSCALL) set_task_syscall_work(child, SYSCALL_TRACE); else clear_task_syscall_work(child, SYSCALL_TRACE); #if defined(CONFIG_GENERIC_ENTRY) || defined(TIF_SYSCALL_EMU) if (request == PTRACE_SYSEMU || request == PTRACE_SYSEMU_SINGLESTEP) set_task_syscall_work(child, SYSCALL_EMU); else clear_task_syscall_work(child, SYSCALL_EMU); #endif if (is_singleblock(request)) { if (unlikely(!arch_has_block_step())) return -EIO; user_enable_block_step(child); } else if (is_singlestep(request) || is_sysemu_singlestep(request)) { if (unlikely(!arch_has_single_step())) return -EIO; user_enable_single_step(child); } else { user_disable_single_step(child); } /* * Change ->exit_code and ->state under siglock to avoid the race * with wait_task_stopped() in between; a non-zero ->exit_code will * wrongly look like another report from tracee. * * Note that we need siglock even if ->exit_code == data and/or this * status was not reported yet, the new status must not be cleared by * wait_task_stopped() after resume. */ spin_lock_irq(&child->sighand->siglock); child->exit_code = data; child->jobctl &= ~JOBCTL_TRACED; wake_up_state(child, __TASK_TRACED); spin_unlock_irq(&child->sighand->siglock); return 0; } #ifdef CONFIG_HAVE_ARCH_TRACEHOOK static const struct user_regset * find_regset(const struct user_regset_view *view, unsigned int type) { const struct user_regset *regset; int n; for (n = 0; n < view->n; ++n) { regset = view->regsets + n; if (regset->core_note_type == type) return regset; } return NULL; } static int ptrace_regset(struct task_struct *task, int req, unsigned int type, struct iovec *kiov) { const struct user_regset_view *view = task_user_regset_view(task); const struct user_regset *regset = find_regset(view, type); int regset_no; if (!regset || (kiov->iov_len % regset->size) != 0) return -EINVAL; regset_no = regset - view->regsets; kiov->iov_len = min(kiov->iov_len, (__kernel_size_t) (regset->n * regset->size)); if (req == PTRACE_GETREGSET) return copy_regset_to_user(task, view, regset_no, 0, kiov->iov_len, kiov->iov_base); else return copy_regset_from_user(task, view, regset_no, 0, kiov->iov_len, kiov->iov_base); } /* * This is declared in linux/regset.h and defined in machine-dependent * code. We put the export here, near the primary machine-neutral use, * to ensure no machine forgets it. */ EXPORT_SYMBOL_GPL(task_user_regset_view); static unsigned long ptrace_get_syscall_info_entry(struct task_struct *child, struct pt_regs *regs, struct ptrace_syscall_info *info) { unsigned long args[ARRAY_SIZE(info->entry.args)]; int i; info->entry.nr = syscall_get_nr(child, regs); syscall_get_arguments(child, regs, args); for (i = 0; i < ARRAY_SIZE(args); i++) info->entry.args[i] = args[i]; /* args is the last field in struct ptrace_syscall_info.entry */ return offsetofend(struct ptrace_syscall_info, entry.args); } static unsigned long ptrace_get_syscall_info_seccomp(struct task_struct *child, struct pt_regs *regs, struct ptrace_syscall_info *info) { /* * As struct ptrace_syscall_info.entry is currently a subset * of struct ptrace_syscall_info.seccomp, it makes sense to * initialize that subset using ptrace_get_syscall_info_entry(). * This can be reconsidered in the future if these structures * diverge significantly enough. */ ptrace_get_syscall_info_entry(child, regs, info); info->seccomp.ret_data = child->ptrace_message; /* * ret_data is the last non-reserved field * in struct ptrace_syscall_info.seccomp */ return offsetofend(struct ptrace_syscall_info, seccomp.ret_data); } static unsigned long ptrace_get_syscall_info_exit(struct task_struct *child, struct pt_regs *regs, struct ptrace_syscall_info *info) { info->exit.rval = syscall_get_error(child, regs); info->exit.is_error = !!info->exit.rval; if (!info->exit.is_error) info->exit.rval = syscall_get_return_value(child, regs); /* is_error is the last field in struct ptrace_syscall_info.exit */ return offsetofend(struct ptrace_syscall_info, exit.is_error); } static int ptrace_get_syscall_info_op(struct task_struct *child) { /* * This does not need lock_task_sighand() to access * child->last_siginfo because ptrace_freeze_traced() * called earlier by ptrace_check_attach() ensures that * the tracee cannot go away and clear its last_siginfo. */ switch (child->last_siginfo ? child->last_siginfo->si_code : 0) { case SIGTRAP | 0x80: switch (child->ptrace_message) { case PTRACE_EVENTMSG_SYSCALL_ENTRY: return PTRACE_SYSCALL_INFO_ENTRY; case PTRACE_EVENTMSG_SYSCALL_EXIT: return PTRACE_SYSCALL_INFO_EXIT; default: return PTRACE_SYSCALL_INFO_NONE; } case SIGTRAP | (PTRACE_EVENT_SECCOMP << 8): return PTRACE_SYSCALL_INFO_SECCOMP; default: return PTRACE_SYSCALL_INFO_NONE; } } static int ptrace_get_syscall_info(struct task_struct *child, unsigned long user_size, void __user *datavp) { struct pt_regs *regs = task_pt_regs(child); struct ptrace_syscall_info info = { .op = ptrace_get_syscall_info_op(child), .arch = syscall_get_arch(child), .instruction_pointer = instruction_pointer(regs), .stack_pointer = user_stack_pointer(regs), }; unsigned long actual_size = offsetof(struct ptrace_syscall_info, entry); unsigned long write_size; switch (info.op) { case PTRACE_SYSCALL_INFO_ENTRY: actual_size = ptrace_get_syscall_info_entry(child, regs, &info); break; case PTRACE_SYSCALL_INFO_EXIT: actual_size = ptrace_get_syscall_info_exit(child, regs, &info); break; case PTRACE_SYSCALL_INFO_SECCOMP: actual_size = ptrace_get_syscall_info_seccomp(child, regs, &info); break; } write_size = min(actual_size, user_size); return copy_to_user(datavp, &info, write_size) ? -EFAULT : actual_size; } static int ptrace_set_syscall_info_entry(struct task_struct *child, struct pt_regs *regs, struct ptrace_syscall_info *info) { unsigned long args[ARRAY_SIZE(info->entry.args)]; int nr = info->entry.nr; int i; /* * Check that the syscall number specified in info->entry.nr * is either a value of type "int" or a sign-extended value * of type "int". */ if (nr != info->entry.nr) return -ERANGE; for (i = 0; i < ARRAY_SIZE(args); i++) { args[i] = info->entry.args[i]; /* * Check that the syscall argument specified in * info->entry.args[i] is either a value of type * "unsigned long" or a sign-extended value of type "long". */ if (args[i] != info->entry.args[i]) return -ERANGE; } syscall_set_nr(child, regs, nr); /* * If the syscall number is set to -1, setting syscall arguments is not * just pointless, it would also clobber the syscall return value on * those architectures that share the same register both for the first * argument of syscall and its return value. */ if (nr != -1) syscall_set_arguments(child, regs, args); return 0; } static int ptrace_set_syscall_info_seccomp(struct task_struct *child, struct pt_regs *regs, struct ptrace_syscall_info *info) { /* * info->entry is currently a subset of info->seccomp, * info->seccomp.ret_data is currently ignored. */ return ptrace_set_syscall_info_entry(child, regs, info); } static int ptrace_set_syscall_info_exit(struct task_struct *child, struct pt_regs *regs, struct ptrace_syscall_info *info) { long rval = info->exit.rval; /* * Check that the return value specified in info->exit.rval * is either a value of type "long" or a sign-extended value * of type "long". */ if (rval != info->exit.rval) return -ERANGE; if (info->exit.is_error) syscall_set_return_value(child, regs, rval, 0); else syscall_set_return_value(child, regs, 0, rval); return 0; } static int ptrace_set_syscall_info(struct task_struct *child, unsigned long user_size, const void __user *datavp) { struct pt_regs *regs = task_pt_regs(child); struct ptrace_syscall_info info; if (user_size < sizeof(info)) return -EINVAL; /* * The compatibility is tracked by info.op and info.flags: if user-space * does not instruct us to use unknown extra bits from future versions * of ptrace_syscall_info, we are not going to read them either. */ if (copy_from_user(&info, datavp, sizeof(info))) return -EFAULT; /* Reserved for future use. */ if (info.flags || info.reserved) return -EINVAL; /* Changing the type of the system call stop is not supported yet. */ if (ptrace_get_syscall_info_op(child) != info.op) return -EINVAL; switch (info.op) { case PTRACE_SYSCALL_INFO_ENTRY: return ptrace_set_syscall_info_entry(child, regs, &info); case PTRACE_SYSCALL_INFO_EXIT: return ptrace_set_syscall_info_exit(child, regs, &info); case PTRACE_SYSCALL_INFO_SECCOMP: return ptrace_set_syscall_info_seccomp(child, regs, &info); default: /* Other types of system call stops are not supported yet. */ return -EINVAL; } } #endif /* CONFIG_HAVE_ARCH_TRACEHOOK */ int ptrace_request(struct task_struct *child, long request, unsigned long addr, unsigned long data) { bool seized = child->ptrace & PT_SEIZED; int ret = -EIO; kernel_siginfo_t siginfo, *si; void __user *datavp = (void __user *) data; unsigned long __user *datalp = datavp; unsigned long flags; switch (request) { case PTRACE_PEEKTEXT: case PTRACE_PEEKDATA: return generic_ptrace_peekdata(child, addr, data); case PTRACE_POKETEXT: case PTRACE_POKEDATA: return generic_ptrace_pokedata(child, addr, data); #ifdef PTRACE_OLDSETOPTIONS case PTRACE_OLDSETOPTIONS: #endif case PTRACE_SETOPTIONS: ret = ptrace_setoptions(child, data); break; case PTRACE_GETEVENTMSG: ret = put_user(child->ptrace_message, datalp); break; case PTRACE_PEEKSIGINFO: ret = ptrace_peek_siginfo(child, addr, data); break; case PTRACE_GETSIGINFO: ret = ptrace_getsiginfo(child, &siginfo); if (!ret) ret = copy_siginfo_to_user(datavp, &siginfo); break; case PTRACE_SETSIGINFO: ret = copy_siginfo_from_user(&siginfo, datavp); if (!ret) ret = ptrace_setsiginfo(child, &siginfo); break; case PTRACE_GETSIGMASK: { sigset_t *mask; if (addr != sizeof(sigset_t)) { ret = -EINVAL; break; } if (test_tsk_restore_sigmask(child)) mask = &child->saved_sigmask; else mask = &child->blocked; if (copy_to_user(datavp, mask, sizeof(sigset_t))) ret = -EFAULT; else ret = 0; break; } case PTRACE_SETSIGMASK: { sigset_t new_set; if (addr != sizeof(sigset_t)) { ret = -EINVAL; break; } if (copy_from_user(&new_set, datavp, sizeof(sigset_t))) { ret = -EFAULT; break; } sigdelsetmask(&new_set, sigmask(SIGKILL)|sigmask(SIGSTOP)); /* * Every thread does recalc_sigpending() after resume, so * retarget_shared_pending() and recalc_sigpending() are not * called here. */ spin_lock_irq(&child->sighand->siglock); child->blocked = new_set; spin_unlock_irq(&child->sighand->siglock); clear_tsk_restore_sigmask(child); ret = 0; break; } case PTRACE_INTERRUPT: /* * Stop tracee without any side-effect on signal or job * control. At least one trap is guaranteed to happen * after this request. If @child is already trapped, the * current trap is not disturbed and another trap will * happen after the current trap is ended with PTRACE_CONT. * * The actual trap might not be PTRACE_EVENT_STOP trap but * the pending condition is cleared regardless. */ if (unlikely(!seized || !lock_task_sighand(child, &flags))) break; /* * INTERRUPT doesn't disturb existing trap sans one * exception. If ptracer issued LISTEN for the current * STOP, this INTERRUPT should clear LISTEN and re-trap * tracee into STOP. */ if (likely(task_set_jobctl_pending(child, JOBCTL_TRAP_STOP))) ptrace_signal_wake_up(child, child->jobctl & JOBCTL_LISTENING); unlock_task_sighand(child, &flags); ret = 0; break; case PTRACE_LISTEN: /* * Listen for events. Tracee must be in STOP. It's not * resumed per-se but is not considered to be in TRACED by * wait(2) or ptrace(2). If an async event (e.g. group * stop state change) happens, tracee will enter STOP trap * again. Alternatively, ptracer can issue INTERRUPT to * finish listening and re-trap tracee into STOP. */ if (unlikely(!seized || !lock_task_sighand(child, &flags))) break; si = child->last_siginfo; if (likely(si && (si->si_code >> 8) == PTRACE_EVENT_STOP)) { child->jobctl |= JOBCTL_LISTENING; /* * If NOTIFY is set, it means event happened between * start of this trap and now. Trigger re-trap. */ if (child->jobctl & JOBCTL_TRAP_NOTIFY) ptrace_signal_wake_up(child, true); ret = 0; } unlock_task_sighand(child, &flags); break; case PTRACE_DETACH: /* detach a process that was attached. */ ret = ptrace_detach(child, data); break; #ifdef CONFIG_BINFMT_ELF_FDPIC case PTRACE_GETFDPIC: { struct mm_struct *mm = get_task_mm(child); unsigned long tmp = 0; ret = -ESRCH; if (!mm) break; switch (addr) { case PTRACE_GETFDPIC_EXEC: tmp = mm->context.exec_fdpic_loadmap; break; case PTRACE_GETFDPIC_INTERP: tmp = mm->context.interp_fdpic_loadmap; break; default: break; } mmput(mm); ret = put_user(tmp, datalp); break; } #endif case PTRACE_SINGLESTEP: #ifdef PTRACE_SINGLEBLOCK case PTRACE_SINGLEBLOCK: #endif #ifdef PTRACE_SYSEMU case PTRACE_SYSEMU: case PTRACE_SYSEMU_SINGLESTEP: #endif case PTRACE_SYSCALL: case PTRACE_CONT: return ptrace_resume(child, request, data); case PTRACE_KILL: send_sig_info(SIGKILL, SEND_SIG_NOINFO, child); return 0; #ifdef CONFIG_HAVE_ARCH_TRACEHOOK case PTRACE_GETREGSET: case PTRACE_SETREGSET: { struct iovec kiov; struct iovec __user *uiov = datavp; if (!access_ok(uiov, sizeof(*uiov))) return -EFAULT; if (__get_user(kiov.iov_base, &uiov->iov_base) || __get_user(kiov.iov_len, &uiov->iov_len)) return -EFAULT; ret = ptrace_regset(child, request, addr, &kiov); if (!ret) ret = __put_user(kiov.iov_len, &uiov->iov_len); break; } case PTRACE_GET_SYSCALL_INFO: ret = ptrace_get_syscall_info(child, addr, datavp); break; case PTRACE_SET_SYSCALL_INFO: ret = ptrace_set_syscall_info(child, addr, datavp); break; #endif case PTRACE_SECCOMP_GET_FILTER: ret = seccomp_get_filter(child, addr, datavp); break; case PTRACE_SECCOMP_GET_METADATA: ret = seccomp_get_metadata(child, addr, datavp); break; #ifdef CONFIG_RSEQ case PTRACE_GET_RSEQ_CONFIGURATION: ret = ptrace_get_rseq_configuration(child, addr, datavp); break; #endif case PTRACE_SET_SYSCALL_USER_DISPATCH_CONFIG: ret = syscall_user_dispatch_set_config(child, addr, datavp); break; case PTRACE_GET_SYSCALL_USER_DISPATCH_CONFIG: ret = syscall_user_dispatch_get_config(child, addr, datavp); break; default: break; } return ret; } SYSCALL_DEFINE4(ptrace, long, request, long, pid, unsigned long, addr, unsigned long, data) { struct task_struct *child; long ret; if (request == PTRACE_TRACEME) { ret = ptrace_traceme(); goto out; } child = find_get_task_by_vpid(pid); if (!child) { ret = -ESRCH; goto out; } if (request == PTRACE_ATTACH || request == PTRACE_SEIZE) { ret = ptrace_attach(child, request, addr, data); goto out_put_task_struct; } ret = ptrace_check_attach(child, request == PTRACE_KILL || request == PTRACE_INTERRUPT); if (ret < 0) goto out_put_task_struct; ret = arch_ptrace(child, request, addr, data); if (ret || request != PTRACE_DETACH) ptrace_unfreeze_traced(child); out_put_task_struct: put_task_struct(child); out: return ret; } int generic_ptrace_peekdata(struct task_struct *tsk, unsigned long addr, unsigned long data) { unsigned long tmp; int copied; copied = ptrace_access_vm(tsk, addr, &tmp, sizeof(tmp), FOLL_FORCE); if (copied != sizeof(tmp)) return -EIO; return put_user(tmp, (unsigned long __user *)data); } int generic_ptrace_pokedata(struct task_struct *tsk, unsigned long addr, unsigned long data) { int copied; copied = ptrace_access_vm(tsk, addr, &data, sizeof(data), FOLL_FORCE | FOLL_WRITE); return (copied == sizeof(data)) ? 0 : -EIO; } #if defined CONFIG_COMPAT int compat_ptrace_request(struct task_struct *child, compat_long_t request, compat_ulong_t addr, compat_ulong_t data) { compat_ulong_t __user *datap = compat_ptr(data); compat_ulong_t word; kernel_siginfo_t siginfo; int ret; switch (request) { case PTRACE_PEEKTEXT: case PTRACE_PEEKDATA: ret = ptrace_access_vm(child, addr, &word, sizeof(word), FOLL_FORCE); if (ret != sizeof(word)) ret = -EIO; else ret = put_user(word, datap); break; case PTRACE_POKETEXT: case PTRACE_POKEDATA: ret = ptrace_access_vm(child, addr, &data, sizeof(data), FOLL_FORCE | FOLL_WRITE); ret = (ret != sizeof(data) ? -EIO : 0); break; case PTRACE_GETEVENTMSG: ret = put_user((compat_ulong_t) child->ptrace_message, datap); break; case PTRACE_GETSIGINFO: ret = ptrace_getsiginfo(child, &siginfo); if (!ret) ret = copy_siginfo_to_user32( (struct compat_siginfo __user *) datap, &siginfo); break; case PTRACE_SETSIGINFO: ret = copy_siginfo_from_user32( &siginfo, (struct compat_siginfo __user *) datap); if (!ret) ret = ptrace_setsiginfo(child, &siginfo); break; #ifdef CONFIG_HAVE_ARCH_TRACEHOOK case PTRACE_GETREGSET: case PTRACE_SETREGSET: { struct iovec kiov; struct compat_iovec __user *uiov = (struct compat_iovec __user *) datap; compat_uptr_t ptr; compat_size_t len; if (!access_ok(uiov, sizeof(*uiov))) return -EFAULT; if (__get_user(ptr, &uiov->iov_base) || __get_user(len, &uiov->iov_len)) return -EFAULT; kiov.iov_base = compat_ptr(ptr); kiov.iov_len = len; ret = ptrace_regset(child, request, addr, &kiov); if (!ret) ret = __put_user(kiov.iov_len, &uiov->iov_len); break; } #endif default: ret = ptrace_request(child, request, addr, data); } return ret; } COMPAT_SYSCALL_DEFINE4(ptrace, compat_long_t, request, compat_long_t, pid, compat_long_t, addr, compat_long_t, data) { struct task_struct *child; long ret; if (request == PTRACE_TRACEME) { ret = ptrace_traceme(); goto out; } child = find_get_task_by_vpid(pid); if (!child) { ret = -ESRCH; goto out; } if (request == PTRACE_ATTACH || request == PTRACE_SEIZE) { ret = ptrace_attach(child, request, addr, data); goto out_put_task_struct; } ret = ptrace_check_attach(child, request == PTRACE_KILL || request == PTRACE_INTERRUPT); if (!ret) { ret = compat_arch_ptrace(child, request, addr, data); if (ret || request != PTRACE_DETACH) ptrace_unfreeze_traced(child); } out_put_task_struct: put_task_struct(child); out: return ret; } #endif /* CONFIG_COMPAT */ |
| 77 12 77 78 78 78 77 78 78 5 73 73 73 73 72 42 41 41 42 42 1 42 42 42 41 2 1 5 5 5 5 5 3 5 5 5 9 5 5 3 5 5 49 50 50 50 50 42 49 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 | // SPDX-License-Identifier: GPL-2.0 /* * Functions related to generic helpers functions */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/bio.h> #include <linux/blkdev.h> #include <linux/scatterlist.h> #include "blk.h" static sector_t bio_discard_limit(struct block_device *bdev, sector_t sector) { unsigned int discard_granularity = bdev_discard_granularity(bdev); sector_t granularity_aligned_sector; if (bdev_is_partition(bdev)) sector += bdev->bd_start_sect; granularity_aligned_sector = round_up(sector, discard_granularity >> SECTOR_SHIFT); /* * Make sure subsequent bios start aligned to the discard granularity if * it needs to be split. */ if (granularity_aligned_sector != sector) return granularity_aligned_sector - sector; /* * Align the bio size to the discard granularity to make splitting the bio * at discard granularity boundaries easier in the driver if needed. */ return round_down(UINT_MAX, discard_granularity) >> SECTOR_SHIFT; } struct bio *blk_alloc_discard_bio(struct block_device *bdev, sector_t *sector, sector_t *nr_sects, gfp_t gfp_mask) { sector_t bio_sects = min(*nr_sects, bio_discard_limit(bdev, *sector)); struct bio *bio; if (!bio_sects) return NULL; bio = bio_alloc(bdev, 0, REQ_OP_DISCARD, gfp_mask); if (!bio) return NULL; bio->bi_iter.bi_sector = *sector; bio->bi_iter.bi_size = bio_sects << SECTOR_SHIFT; *sector += bio_sects; *nr_sects -= bio_sects; /* * We can loop for a long time in here if someone does full device * discards (like mkfs). Be nice and allow us to schedule out to avoid * softlocking if preempt is disabled. */ cond_resched(); return bio; } int __blkdev_issue_discard(struct block_device *bdev, sector_t sector, sector_t nr_sects, gfp_t gfp_mask, struct bio **biop) { struct bio *bio; while ((bio = blk_alloc_discard_bio(bdev, §or, &nr_sects, gfp_mask))) *biop = bio_chain_and_submit(*biop, bio); return 0; } EXPORT_SYMBOL(__blkdev_issue_discard); /** * blkdev_issue_discard - queue a discard * @bdev: blockdev to issue discard for * @sector: start sector * @nr_sects: number of sectors to discard * @gfp_mask: memory allocation flags (for bio_alloc) * * Description: * Issue a discard request for the sectors in question. */ int blkdev_issue_discard(struct block_device *bdev, sector_t sector, sector_t nr_sects, gfp_t gfp_mask) { struct bio *bio = NULL; struct blk_plug plug; int ret = 0; blk_start_plug(&plug); __blkdev_issue_discard(bdev, sector, nr_sects, gfp_mask, &bio); if (bio) { ret = submit_bio_wait(bio); if (ret == -EOPNOTSUPP) ret = 0; bio_put(bio); } blk_finish_plug(&plug); return ret; } EXPORT_SYMBOL(blkdev_issue_discard); static sector_t bio_write_zeroes_limit(struct block_device *bdev) { sector_t bs_mask = (bdev_logical_block_size(bdev) >> 9) - 1; return min(bdev_write_zeroes_sectors(bdev), (UINT_MAX >> SECTOR_SHIFT) & ~bs_mask); } /* * There is no reliable way for the SCSI subsystem to determine whether a * device supports a WRITE SAME operation without actually performing a write * to media. As a result, write_zeroes is enabled by default and will be * disabled if a zeroing operation subsequently fails. This means that this * queue limit is likely to change at runtime. */ static void __blkdev_issue_write_zeroes(struct block_device *bdev, sector_t sector, sector_t nr_sects, gfp_t gfp_mask, struct bio **biop, unsigned flags, sector_t limit) { while (nr_sects) { unsigned int len = min(nr_sects, limit); struct bio *bio; if ((flags & BLKDEV_ZERO_KILLABLE) && fatal_signal_pending(current)) break; bio = bio_alloc(bdev, 0, REQ_OP_WRITE_ZEROES, gfp_mask); bio->bi_iter.bi_sector = sector; if (flags & BLKDEV_ZERO_NOUNMAP) bio->bi_opf |= REQ_NOUNMAP; bio->bi_iter.bi_size = len << SECTOR_SHIFT; *biop = bio_chain_and_submit(*biop, bio); nr_sects -= len; sector += len; cond_resched(); } } static int blkdev_issue_write_zeroes(struct block_device *bdev, sector_t sector, sector_t nr_sects, gfp_t gfp, unsigned flags) { sector_t limit = bio_write_zeroes_limit(bdev); struct bio *bio = NULL; struct blk_plug plug; int ret = 0; blk_start_plug(&plug); __blkdev_issue_write_zeroes(bdev, sector, nr_sects, gfp, &bio, flags, limit); if (bio) { if ((flags & BLKDEV_ZERO_KILLABLE) && fatal_signal_pending(current)) { bio_await_chain(bio); blk_finish_plug(&plug); return -EINTR; } ret = submit_bio_wait(bio); bio_put(bio); } blk_finish_plug(&plug); /* * For some devices there is no non-destructive way to verify whether * WRITE ZEROES is actually supported. These will clear the capability * on an I/O error, in which case we'll turn any error into * "not supported" here. */ if (ret && !bdev_write_zeroes_sectors(bdev)) return -EOPNOTSUPP; return ret; } /* * Convert a number of 512B sectors to a number of pages. * The result is limited to a number of pages that can fit into a BIO. * Also make sure that the result is always at least 1 (page) for the cases * where nr_sects is lower than the number of sectors in a page. */ static unsigned int __blkdev_sectors_to_bio_pages(sector_t nr_sects) { sector_t pages = DIV_ROUND_UP_SECTOR_T(nr_sects, PAGE_SIZE / 512); return min(pages, (sector_t)BIO_MAX_VECS); } static void __blkdev_issue_zero_pages(struct block_device *bdev, sector_t sector, sector_t nr_sects, gfp_t gfp_mask, struct bio **biop, unsigned int flags) { struct folio *zero_folio = largest_zero_folio(); while (nr_sects) { unsigned int nr_vecs = __blkdev_sectors_to_bio_pages(nr_sects); struct bio *bio; bio = bio_alloc(bdev, nr_vecs, REQ_OP_WRITE, gfp_mask); bio->bi_iter.bi_sector = sector; if ((flags & BLKDEV_ZERO_KILLABLE) && fatal_signal_pending(current)) break; do { unsigned int len; len = min_t(sector_t, folio_size(zero_folio), nr_sects << SECTOR_SHIFT); if (!bio_add_folio(bio, zero_folio, len, 0)) break; nr_sects -= len >> SECTOR_SHIFT; sector += len >> SECTOR_SHIFT; } while (nr_sects); *biop = bio_chain_and_submit(*biop, bio); cond_resched(); } } static int blkdev_issue_zero_pages(struct block_device *bdev, sector_t sector, sector_t nr_sects, gfp_t gfp, unsigned flags) { struct bio *bio = NULL; struct blk_plug plug; int ret = 0; if (flags & BLKDEV_ZERO_NOFALLBACK) return -EOPNOTSUPP; blk_start_plug(&plug); __blkdev_issue_zero_pages(bdev, sector, nr_sects, gfp, &bio, flags); if (bio) { if ((flags & BLKDEV_ZERO_KILLABLE) && fatal_signal_pending(current)) { bio_await_chain(bio); blk_finish_plug(&plug); return -EINTR; } ret = submit_bio_wait(bio); bio_put(bio); } blk_finish_plug(&plug); return ret; } /** * __blkdev_issue_zeroout - generate number of zero filed write bios * @bdev: blockdev to issue * @sector: start sector * @nr_sects: number of sectors to write * @gfp_mask: memory allocation flags (for bio_alloc) * @biop: pointer to anchor bio * @flags: controls detailed behavior * * Description: * Zero-fill a block range, either using hardware offload or by explicitly * writing zeroes to the device. * * If a device is using logical block provisioning, the underlying space will * not be released if %flags contains BLKDEV_ZERO_NOUNMAP. * * If %flags contains BLKDEV_ZERO_NOFALLBACK, the function will return * -EOPNOTSUPP if no explicit hardware offload for zeroing is provided. */ int __blkdev_issue_zeroout(struct block_device *bdev, sector_t sector, sector_t nr_sects, gfp_t gfp_mask, struct bio **biop, unsigned flags) { sector_t limit = bio_write_zeroes_limit(bdev); if (bdev_read_only(bdev)) return -EPERM; if (limit) { __blkdev_issue_write_zeroes(bdev, sector, nr_sects, gfp_mask, biop, flags, limit); } else { if (flags & BLKDEV_ZERO_NOFALLBACK) return -EOPNOTSUPP; __blkdev_issue_zero_pages(bdev, sector, nr_sects, gfp_mask, biop, flags); } return 0; } EXPORT_SYMBOL(__blkdev_issue_zeroout); /** * blkde |