1/* 2 * Atheros CARL9170 driver 3 * 4 * Driver specific definitions 5 * 6 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> 7 * Copyright 2009, 2010, Christian Lamparter <chunkeey@googlemail.com> 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; see the file COPYING. If not, see 21 * http://www.gnu.org/licenses/. 22 * 23 * This file incorporates work covered by the following copyright and 24 * permission notice: 25 * Copyright (c) 2007-2008 Atheros Communications, Inc. 26 * 27 * Permission to use, copy, modify, and/or distribute this software for any 28 * purpose with or without fee is hereby granted, provided that the above 29 * copyright notice and this permission notice appear in all copies. 30 * 31 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 32 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 33 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 34 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 35 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 36 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 37 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 38 */ 39#ifndef __CARL9170_H 40#define __CARL9170_H 41 42#include <linux/kernel.h> 43#include <linux/firmware.h> 44#include <linux/completion.h> 45#include <linux/spinlock.h> 46#include <linux/hw_random.h> 47#include <net/cfg80211.h> 48#include <net/mac80211.h> 49#include <linux/usb.h> 50#ifdef CONFIG_CARL9170_LEDS 51#include <linux/leds.h> 52#endif /* CONFIG_CARL9170_LEDS */ 53#ifdef CONFIG_CARL9170_WPC 54#include <linux/input.h> 55#endif /* CONFIG_CARL9170_WPC */ 56#include "eeprom.h" 57#include "wlan.h" 58#include "hw.h" 59#include "fwdesc.h" 60#include "fwcmd.h" 61#include "../regd.h" 62 63#ifdef CONFIG_CARL9170_DEBUGFS 64#include "debug.h" 65#endif /* CONFIG_CARL9170_DEBUGFS */ 66 67#define CARL9170FW_NAME "carl9170-1.fw" 68 69#define PAYLOAD_MAX (CARL9170_MAX_CMD_LEN / 4 - 1) 70 71static const u8 ar9170_qmap[__AR9170_NUM_TXQ] = { 3, 2, 1, 0 }; 72 73#define CARL9170_MAX_RX_BUFFER_SIZE 8192 74 75enum carl9170_device_state { 76 CARL9170_UNKNOWN_STATE, 77 CARL9170_STOPPED, 78 CARL9170_IDLE, 79 CARL9170_STARTED, 80}; 81 82#define WME_BA_BMP_SIZE 64 83#define CARL9170_TX_USER_RATE_TRIES 3 84 85#define TID_TO_WME_AC(_tid) \ 86 ((((_tid) == 0) || ((_tid) == 3)) ? IEEE80211_AC_BE : \ 87 (((_tid) == 1) || ((_tid) == 2)) ? IEEE80211_AC_BK : \ 88 (((_tid) == 4) || ((_tid) == 5)) ? IEEE80211_AC_VI : \ 89 IEEE80211_AC_VO) 90 91#define SEQ_DIFF(_start, _seq) \ 92 (((_start) - (_seq)) & 0x0fff) 93#define SEQ_PREV(_seq) \ 94 (((_seq) - 1) & 0x0fff) 95#define SEQ_NEXT(_seq) \ 96 (((_seq) + 1) & 0x0fff) 97#define BAW_WITHIN(_start, _bawsz, _seqno) \ 98 ((((_seqno) - (_start)) & 0xfff) < (_bawsz)) 99 100enum carl9170_tid_state { 101 CARL9170_TID_STATE_INVALID, 102 CARL9170_TID_STATE_KILLED, 103 CARL9170_TID_STATE_SHUTDOWN, 104 CARL9170_TID_STATE_SUSPEND, 105 CARL9170_TID_STATE_PROGRESS, 106 CARL9170_TID_STATE_IDLE, 107 CARL9170_TID_STATE_XMIT, 108}; 109 110#define CARL9170_BAW_BITS (2 * WME_BA_BMP_SIZE) 111#define CARL9170_BAW_SIZE (BITS_TO_LONGS(CARL9170_BAW_BITS)) 112#define CARL9170_BAW_LEN (DIV_ROUND_UP(CARL9170_BAW_BITS, BITS_PER_BYTE)) 113 114struct carl9170_sta_tid { 115 /* must be the first entry! */ 116 struct list_head list; 117 118 /* temporary list for RCU unlink procedure */ 119 struct list_head tmp_list; 120 121 /* lock for the following data structures */ 122 spinlock_t lock; 123 124 unsigned int counter; 125 enum carl9170_tid_state state; 126 u8 tid; /* TID number ( 0 - 15 ) */ 127 u16 max; /* max. AMPDU size */ 128 129 u16 snx; /* awaiting _next_ frame */ 130 u16 hsn; /* highest _queued_ sequence */ 131 u16 bsn; /* base of the tx/agg bitmap */ 132 unsigned long bitmap[CARL9170_BAW_SIZE]; 133 134 /* Preaggregation reorder queue */ 135 struct sk_buff_head queue; 136 137 struct ieee80211_sta *sta; 138 struct ieee80211_vif *vif; 139}; 140 141#define CARL9170_QUEUE_TIMEOUT 256 142#define CARL9170_BUMP_QUEUE 1000 143#define CARL9170_TX_TIMEOUT 2500 144#define CARL9170_JANITOR_DELAY 128 145#define CARL9170_QUEUE_STUCK_TIMEOUT 5500 146#define CARL9170_STAT_WORK 30000 147 148#define CARL9170_NUM_TX_AGG_MAX 30 149 150/* 151 * Tradeoff between stability/latency and speed. 152 * 153 * AR9170_TXQ_DEPTH is devised by dividing the amount of available 154 * tx buffers with the size of a full ethernet frame + overhead. 155 * 156 * Naturally: The higher the limit, the faster the device CAN send. 157 * However, even a slight over-commitment at the wrong time and the 158 * hardware is doomed to send all already-queued frames at suboptimal 159 * rates. This in turn leads to an enormous amount of unsuccessful 160 * retries => Latency goes up, whereas the throughput goes down. CRASH! 161 */ 162#define CARL9170_NUM_TX_LIMIT_HARD ((AR9170_TXQ_DEPTH * 3) / 2) 163#define CARL9170_NUM_TX_LIMIT_SOFT (AR9170_TXQ_DEPTH) 164 165struct carl9170_tx_queue_stats { 166 unsigned int count; 167 unsigned int limit; 168 unsigned int len; 169}; 170 171struct carl9170_vif { 172 unsigned int id; 173 struct ieee80211_vif __rcu *vif; 174}; 175 176struct carl9170_vif_info { 177 struct list_head list; 178 bool active; 179 unsigned int id; 180 struct sk_buff *beacon; 181 bool enable_beacon; 182}; 183 184#define AR9170_NUM_RX_URBS 16 185#define AR9170_NUM_RX_URBS_MUL 2 186#define AR9170_NUM_TX_URBS 8 187#define AR9170_NUM_RX_URBS_POOL (AR9170_NUM_RX_URBS_MUL * AR9170_NUM_RX_URBS) 188 189enum carl9170_device_features { 190 CARL9170_WPS_BUTTON = BIT(0), 191 CARL9170_ONE_LED = BIT(1), 192}; 193 194#ifdef CONFIG_CARL9170_LEDS 195struct ar9170; 196 197struct carl9170_led { 198 struct ar9170 *ar; 199 struct led_classdev l; 200 char name[32]; 201 unsigned int toggled; 202 bool last_state; 203 bool registered; 204}; 205#endif /* CONFIG_CARL9170_LEDS */ 206 207enum carl9170_restart_reasons { 208 CARL9170_RR_NO_REASON = 0, 209 CARL9170_RR_FATAL_FIRMWARE_ERROR, 210 CARL9170_RR_TOO_MANY_FIRMWARE_ERRORS, 211 CARL9170_RR_WATCHDOG, 212 CARL9170_RR_STUCK_TX, 213 CARL9170_RR_UNRESPONSIVE_DEVICE, 214 CARL9170_RR_COMMAND_TIMEOUT, 215 CARL9170_RR_TOO_MANY_PHY_ERRORS, 216 CARL9170_RR_LOST_RSP, 217 CARL9170_RR_INVALID_RSP, 218 CARL9170_RR_USER_REQUEST, 219 220 __CARL9170_RR_LAST, 221}; 222 223enum carl9170_erp_modes { 224 CARL9170_ERP_INVALID, 225 CARL9170_ERP_AUTO, 226 CARL9170_ERP_MAC80211, 227 CARL9170_ERP_OFF, 228 CARL9170_ERP_CTS, 229 CARL9170_ERP_RTS, 230 __CARL9170_ERP_NUM, 231}; 232 233struct ar9170 { 234 struct ath_common common; 235 struct ieee80211_hw *hw; 236 struct mutex mutex; 237 enum carl9170_device_state state; 238 spinlock_t state_lock; 239 enum carl9170_restart_reasons last_reason; 240 bool registered; 241 242 /* USB */ 243 struct usb_device *udev; 244 struct usb_interface *intf; 245 struct usb_anchor rx_anch; 246 struct usb_anchor rx_work; 247 struct usb_anchor rx_pool; 248 struct usb_anchor tx_wait; 249 struct usb_anchor tx_anch; 250 struct usb_anchor tx_cmd; 251 struct usb_anchor tx_err; 252 struct tasklet_struct usb_tasklet; 253 atomic_t tx_cmd_urbs; 254 atomic_t tx_anch_urbs; 255 atomic_t rx_anch_urbs; 256 atomic_t rx_work_urbs; 257 atomic_t rx_pool_urbs; 258 kernel_ulong_t features; 259 bool usb_ep_cmd_is_bulk; 260 261 /* firmware settings */ 262 struct completion fw_load_wait; 263 struct completion fw_boot_wait; 264 struct { 265 const struct carl9170fw_desc_head *desc; 266 const struct firmware *fw; 267 unsigned int offset; 268 unsigned int address; 269 unsigned int cmd_bufs; 270 unsigned int api_version; 271 unsigned int vif_num; 272 unsigned int err_counter; 273 unsigned int bug_counter; 274 u32 beacon_addr; 275 unsigned int beacon_max_len; 276 bool rx_stream; 277 bool tx_stream; 278 bool rx_filter; 279 bool hw_counters; 280 unsigned int mem_blocks; 281 unsigned int mem_block_size; 282 unsigned int rx_size; 283 unsigned int tx_seq_table; 284 bool ba_filter; 285 bool disable_offload_fw; 286 } fw; 287 288 /* interface configuration combinations */ 289 struct ieee80211_iface_limit if_comb_limits[1]; 290 struct ieee80211_iface_combination if_combs[1]; 291 292 /* reset / stuck frames/queue detection */ 293 struct work_struct restart_work; 294 struct work_struct ping_work; 295 unsigned int restart_counter; 296 unsigned long queue_stop_timeout[__AR9170_NUM_TXQ]; 297 unsigned long max_queue_stop_timeout[__AR9170_NUM_TXQ]; 298 bool needs_full_reset; 299 bool force_usb_reset; 300 atomic_t pending_restarts; 301 302 /* interface mode settings */ 303 struct list_head vif_list; 304 unsigned long vif_bitmap; 305 unsigned int vifs; 306 struct carl9170_vif vif_priv[AR9170_MAX_VIRTUAL_MAC]; 307 308 /* beaconing */ 309 spinlock_t beacon_lock; 310 unsigned int global_pretbtt; 311 unsigned int global_beacon_int; 312 struct carl9170_vif_info __rcu *beacon_iter; 313 unsigned int beacon_enabled; 314 315 /* cryptographic engine */ 316 u64 usedkeys; 317 bool rx_software_decryption; 318 bool disable_offload; 319 320 /* filter settings */ 321 u64 cur_mc_hash; 322 u32 cur_filter; 323 unsigned int filter_state; 324 unsigned int rx_filter_caps; 325 bool sniffer_enabled; 326 327 /* MAC */ 328 enum carl9170_erp_modes erp_mode; 329 330 /* PHY */ 331 struct ieee80211_channel *channel; 332 unsigned int num_channels; 333 int noise[4]; 334 unsigned int chan_fail; 335 unsigned int total_chan_fail; 336 u8 heavy_clip; 337 u8 ht_settings; 338 struct { 339 u64 active; /* usec */ 340 u64 cca; /* usec */ 341 u64 tx_time; /* usec */ 342 u64 rx_total; 343 u64 rx_overrun; 344 } tally; 345 struct delayed_work stat_work; 346 struct survey_info *survey; 347 348 /* power calibration data */ 349 u8 power_5G_leg[4]; 350 u8 power_2G_cck[4]; 351 u8 power_2G_ofdm[4]; 352 u8 power_5G_ht20[8]; 353 u8 power_5G_ht40[8]; 354 u8 power_2G_ht20[8]; 355 u8 power_2G_ht40[8]; 356 357#ifdef CONFIG_CARL9170_LEDS 358 /* LED */ 359 struct delayed_work led_work; 360 struct carl9170_led leds[AR9170_NUM_LEDS]; 361#endif /* CONFIG_CARL9170_LEDS */ 362 363 /* qos queue settings */ 364 spinlock_t tx_stats_lock; 365 struct carl9170_tx_queue_stats tx_stats[__AR9170_NUM_TXQ]; 366 struct ieee80211_tx_queue_params edcf[5]; 367 struct completion tx_flush; 368 369 /* CMD */ 370 int cmd_seq; 371 int readlen; 372 u8 *readbuf; 373 spinlock_t cmd_lock; 374 struct completion cmd_wait; 375 union { 376 __le32 cmd_buf[PAYLOAD_MAX + 1]; 377 struct carl9170_cmd cmd; 378 struct carl9170_rsp rsp; 379 }; 380 381 /* statistics */ 382 unsigned int tx_dropped; 383 unsigned int tx_ack_failures; 384 unsigned int tx_fcs_errors; 385 unsigned int rx_dropped; 386 387 /* EEPROM */ 388 struct ar9170_eeprom eeprom; 389 390 /* tx queuing */ 391 struct sk_buff_head tx_pending[__AR9170_NUM_TXQ]; 392 struct sk_buff_head tx_status[__AR9170_NUM_TXQ]; 393 struct delayed_work tx_janitor; 394 unsigned long tx_janitor_last_run; 395 bool tx_schedule; 396 397 /* tx ampdu */ 398 struct work_struct ampdu_work; 399 spinlock_t tx_ampdu_list_lock; 400 struct carl9170_sta_tid __rcu *tx_ampdu_iter; 401 struct list_head tx_ampdu_list; 402 atomic_t tx_ampdu_upload; 403 atomic_t tx_ampdu_scheduler; 404 atomic_t tx_total_pending; 405 atomic_t tx_total_queued; 406 unsigned int tx_ampdu_list_len; 407 int current_density; 408 int current_factor; 409 bool tx_ampdu_schedule; 410 411 /* internal memory management */ 412 spinlock_t mem_lock; 413 unsigned long *mem_bitmap; 414 atomic_t mem_free_blocks; 415 atomic_t mem_allocs; 416 417 /* rxstream mpdu merge */ 418 struct ar9170_rx_head rx_plcp; 419 bool rx_has_plcp; 420 struct sk_buff *rx_failover; 421 int rx_failover_missing; 422 u32 ampdu_ref; 423 424 /* FIFO for collecting outstanding BlockAckRequest */ 425 struct list_head bar_list[__AR9170_NUM_TXQ]; 426 spinlock_t bar_list_lock[__AR9170_NUM_TXQ]; 427 428#ifdef CONFIG_CARL9170_WPC 429 struct { 430 bool pbc_state; 431 struct input_dev *pbc; 432 char name[32]; 433 char phys[32]; 434 } wps; 435#endif /* CONFIG_CARL9170_WPC */ 436 437#ifdef CONFIG_CARL9170_DEBUGFS 438 struct carl9170_debug debug; 439 struct dentry *debug_dir; 440#endif /* CONFIG_CARL9170_DEBUGFS */ 441 442 /* PSM */ 443 struct work_struct ps_work; 444 struct { 445 unsigned int dtim_counter; 446 unsigned long last_beacon; 447 unsigned long last_action; 448 unsigned long last_slept; 449 unsigned int sleep_ms; 450 unsigned int off_override; 451 bool state; 452 } ps; 453 454#ifdef CONFIG_CARL9170_HWRNG 455# define CARL9170_HWRNG_CACHE_SIZE CARL9170_MAX_CMD_PAYLOAD_LEN 456 struct { 457 struct hwrng rng; 458 bool initialized; 459 char name[30 + 1]; 460 u16 cache[CARL9170_HWRNG_CACHE_SIZE / sizeof(u16)]; 461 unsigned int cache_idx; 462 } rng; 463#endif /* CONFIG_CARL9170_HWRNG */ 464}; 465 466enum carl9170_ps_off_override_reasons { 467 PS_OFF_VIF = BIT(0), 468 PS_OFF_BCN = BIT(1), 469}; 470 471struct carl9170_bar_list_entry { 472 struct list_head list; 473 struct rcu_head head; 474 struct sk_buff *skb; 475}; 476 477struct carl9170_ba_stats { 478 u8 ampdu_len; 479 u8 ampdu_ack_len; 480 bool clear; 481 bool req; 482}; 483 484struct carl9170_sta_info { 485 bool ht_sta; 486 bool sleeping; 487 atomic_t pending_frames; 488 unsigned int ampdu_max_len; 489 struct carl9170_sta_tid __rcu *agg[IEEE80211_NUM_TIDS]; 490 struct carl9170_ba_stats stats[IEEE80211_NUM_TIDS]; 491}; 492 493struct carl9170_tx_info { 494 unsigned long timeout; 495 struct ar9170 *ar; 496 struct kref ref; 497}; 498 499#define CHK_DEV_STATE(a, s) (((struct ar9170 *)a)->state >= (s)) 500#define IS_INITIALIZED(a) (CHK_DEV_STATE(a, CARL9170_STOPPED)) 501#define IS_ACCEPTING_CMD(a) (CHK_DEV_STATE(a, CARL9170_IDLE)) 502#define IS_STARTED(a) (CHK_DEV_STATE(a, CARL9170_STARTED)) 503 504static inline void __carl9170_set_state(struct ar9170 *ar, 505 enum carl9170_device_state newstate) 506{ 507 ar->state = newstate; 508} 509 510static inline void carl9170_set_state(struct ar9170 *ar, 511 enum carl9170_device_state newstate) 512{ 513 unsigned long flags; 514 515 spin_lock_irqsave(&ar->state_lock, flags); 516 __carl9170_set_state(ar, newstate); 517 spin_unlock_irqrestore(&ar->state_lock, flags); 518} 519 520static inline void carl9170_set_state_when(struct ar9170 *ar, 521 enum carl9170_device_state min, enum carl9170_device_state newstate) 522{ 523 unsigned long flags; 524 525 spin_lock_irqsave(&ar->state_lock, flags); 526 if (CHK_DEV_STATE(ar, min)) 527 __carl9170_set_state(ar, newstate); 528 spin_unlock_irqrestore(&ar->state_lock, flags); 529} 530 531/* exported interface */ 532void *carl9170_alloc(size_t priv_size); 533int carl9170_register(struct ar9170 *ar); 534void carl9170_unregister(struct ar9170 *ar); 535void carl9170_free(struct ar9170 *ar); 536void carl9170_restart(struct ar9170 *ar, const enum carl9170_restart_reasons r); 537void carl9170_ps_check(struct ar9170 *ar); 538 539/* USB back-end */ 540int carl9170_usb_open(struct ar9170 *ar); 541void carl9170_usb_stop(struct ar9170 *ar); 542void carl9170_usb_tx(struct ar9170 *ar, struct sk_buff *skb); 543void carl9170_usb_handle_tx_err(struct ar9170 *ar); 544int carl9170_exec_cmd(struct ar9170 *ar, const enum carl9170_cmd_oids, 545 u32 plen, void *payload, u32 rlen, void *resp); 546int __carl9170_exec_cmd(struct ar9170 *ar, struct carl9170_cmd *cmd, 547 const bool free_buf); 548int carl9170_usb_restart(struct ar9170 *ar); 549void carl9170_usb_reset(struct ar9170 *ar); 550 551/* MAC */ 552int carl9170_init_mac(struct ar9170 *ar); 553int carl9170_set_qos(struct ar9170 *ar); 554int carl9170_update_multicast(struct ar9170 *ar, const u64 mc_hast); 555int carl9170_mod_virtual_mac(struct ar9170 *ar, const unsigned int id, 556 const u8 *mac); 557int carl9170_set_operating_mode(struct ar9170 *ar); 558int carl9170_set_beacon_timers(struct ar9170 *ar); 559int carl9170_set_dyn_sifs_ack(struct ar9170 *ar); 560int carl9170_set_rts_cts_rate(struct ar9170 *ar); 561int carl9170_set_ampdu_settings(struct ar9170 *ar); 562int carl9170_set_slot_time(struct ar9170 *ar); 563int carl9170_set_mac_rates(struct ar9170 *ar); 564int carl9170_set_hwretry_limit(struct ar9170 *ar, const u32 max_retry); 565int carl9170_upload_key(struct ar9170 *ar, const u8 id, const u8 *mac, 566 const u8 ktype, const u8 keyidx, const u8 *keydata, const int keylen); 567int carl9170_disable_key(struct ar9170 *ar, const u8 id); 568int carl9170_set_mac_tpc(struct ar9170 *ar, struct ieee80211_channel *channel); 569 570/* RX */ 571void carl9170_rx(struct ar9170 *ar, void *buf, unsigned int len); 572void carl9170_handle_command_response(struct ar9170 *ar, void *buf, u32 len); 573 574/* TX */ 575void carl9170_op_tx(struct ieee80211_hw *hw, 576 struct ieee80211_tx_control *control, 577 struct sk_buff *skb); 578void carl9170_tx_janitor(struct work_struct *work); 579void carl9170_tx_process_status(struct ar9170 *ar, 580 const struct carl9170_rsp *cmd); 581void carl9170_tx_status(struct ar9170 *ar, struct sk_buff *skb, 582 const bool success); 583void carl9170_tx_callback(struct ar9170 *ar, struct sk_buff *skb); 584void carl9170_tx_drop(struct ar9170 *ar, struct sk_buff *skb); 585void carl9170_tx_scheduler(struct ar9170 *ar); 586void carl9170_tx_get_skb(struct sk_buff *skb); 587int carl9170_tx_put_skb(struct sk_buff *skb); 588int carl9170_update_beacon(struct ar9170 *ar, const bool submit); 589 590/* LEDs */ 591#ifdef CONFIG_CARL9170_LEDS 592int carl9170_led_register(struct ar9170 *ar); 593void carl9170_led_unregister(struct ar9170 *ar); 594#endif /* CONFIG_CARL9170_LEDS */ 595int carl9170_led_init(struct ar9170 *ar); 596int carl9170_led_set_state(struct ar9170 *ar, const u32 led_state); 597 598/* PHY / RF */ 599int carl9170_set_channel(struct ar9170 *ar, struct ieee80211_channel *channel, 600 enum nl80211_channel_type bw); 601int carl9170_get_noisefloor(struct ar9170 *ar); 602 603/* FW */ 604int carl9170_parse_firmware(struct ar9170 *ar); 605 606extern struct ieee80211_rate __carl9170_ratetable[]; 607extern int modparam_noht; 608 609static inline struct ar9170 *carl9170_get_priv(struct carl9170_vif *carl_vif) 610{ 611 return container_of(carl_vif, struct ar9170, 612 vif_priv[carl_vif->id]); 613} 614 615static inline struct ieee80211_hdr *carl9170_get_hdr(struct sk_buff *skb) 616{ 617 return (void *)((struct _carl9170_tx_superframe *) 618 skb->data)->frame_data; 619} 620 621static inline u16 get_seq_h(struct ieee80211_hdr *hdr) 622{ 623 return le16_to_cpu(hdr->seq_ctrl) >> 4; 624} 625 626static inline u16 carl9170_get_seq(struct sk_buff *skb) 627{ 628 return get_seq_h(carl9170_get_hdr(skb)); 629} 630 631static inline u16 get_tid_h(struct ieee80211_hdr *hdr) 632{ 633 return (ieee80211_get_qos_ctl(hdr))[0] & IEEE80211_QOS_CTL_TID_MASK; 634} 635 636static inline u16 carl9170_get_tid(struct sk_buff *skb) 637{ 638 return get_tid_h(carl9170_get_hdr(skb)); 639} 640 641static inline struct ieee80211_vif * 642carl9170_get_vif(struct carl9170_vif_info *priv) 643{ 644 return container_of((void *)priv, struct ieee80211_vif, drv_priv); 645} 646 647/* Protected by ar->mutex or RCU */ 648static inline struct ieee80211_vif *carl9170_get_main_vif(struct ar9170 *ar) 649{ 650 struct carl9170_vif_info *cvif; 651 652 list_for_each_entry_rcu(cvif, &ar->vif_list, list) { 653 if (cvif->active) 654 return carl9170_get_vif(cvif); 655 } 656 657 return NULL; 658} 659 660static inline bool is_main_vif(struct ar9170 *ar, struct ieee80211_vif *vif) 661{ 662 bool ret; 663 664 rcu_read_lock(); 665 ret = (carl9170_get_main_vif(ar) == vif); 666 rcu_read_unlock(); 667 return ret; 668} 669 670#endif /* __CARL9170_H */ 671