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 inline u8 ar9170_qmap(u8 idx) 72{ 73 return 3 - idx; /* { 3, 2, 1, 0 } */ 74} 75 76#define CARL9170_MAX_RX_BUFFER_SIZE 8192 77 78enum carl9170_device_state { 79 CARL9170_UNKNOWN_STATE, 80 CARL9170_STOPPED, 81 CARL9170_IDLE, 82 CARL9170_STARTED, 83}; 84 85#define WME_BA_BMP_SIZE 64 86#define CARL9170_TX_USER_RATE_TRIES 3 87 88#define TID_TO_WME_AC(_tid) \ 89 ((((_tid) == 0) || ((_tid) == 3)) ? IEEE80211_AC_BE : \ 90 (((_tid) == 1) || ((_tid) == 2)) ? IEEE80211_AC_BK : \ 91 (((_tid) == 4) || ((_tid) == 5)) ? IEEE80211_AC_VI : \ 92 IEEE80211_AC_VO) 93 94#define SEQ_DIFF(_start, _seq) \ 95 (((_start) - (_seq)) & 0x0fff) 96#define SEQ_PREV(_seq) \ 97 (((_seq) - 1) & 0x0fff) 98#define SEQ_NEXT(_seq) \ 99 (((_seq) + 1) & 0x0fff) 100#define BAW_WITHIN(_start, _bawsz, _seqno) \ 101 ((((_seqno) - (_start)) & 0xfff) < (_bawsz)) 102 103enum carl9170_tid_state { 104 CARL9170_TID_STATE_INVALID, 105 CARL9170_TID_STATE_KILLED, 106 CARL9170_TID_STATE_SHUTDOWN, 107 CARL9170_TID_STATE_SUSPEND, 108 CARL9170_TID_STATE_PROGRESS, 109 CARL9170_TID_STATE_IDLE, 110 CARL9170_TID_STATE_XMIT, 111}; 112 113#define CARL9170_BAW_BITS (2 * WME_BA_BMP_SIZE) 114#define CARL9170_BAW_SIZE (BITS_TO_LONGS(CARL9170_BAW_BITS)) 115#define CARL9170_BAW_LEN (DIV_ROUND_UP(CARL9170_BAW_BITS, BITS_PER_BYTE)) 116 117struct carl9170_sta_tid { 118 /* must be the first entry! */ 119 struct list_head list; 120 121 /* temporary list for RCU unlink procedure */ 122 struct list_head tmp_list; 123 124 /* lock for the following data structures */ 125 spinlock_t lock; 126 127 unsigned int counter; 128 enum carl9170_tid_state state; 129 u8 tid; /* TID number ( 0 - 15 ) */ 130 u16 max; /* max. AMPDU size */ 131 132 u16 snx; /* awaiting _next_ frame */ 133 u16 hsn; /* highest _queued_ sequence */ 134 u16 bsn; /* base of the tx/agg bitmap */ 135 unsigned long bitmap[CARL9170_BAW_SIZE]; 136 137 /* Preaggregation reorder queue */ 138 struct sk_buff_head queue; 139 140 struct ieee80211_sta *sta; 141 struct ieee80211_vif *vif; 142}; 143 144#define CARL9170_QUEUE_TIMEOUT 256 145#define CARL9170_BUMP_QUEUE 1000 146#define CARL9170_TX_TIMEOUT 2500 147#define CARL9170_JANITOR_DELAY 128 148#define CARL9170_QUEUE_STUCK_TIMEOUT 5500 149#define CARL9170_STAT_WORK 30000 150 151#define CARL9170_NUM_TX_AGG_MAX 30 152 153/* 154 * Tradeoff between stability/latency and speed. 155 * 156 * AR9170_TXQ_DEPTH is devised by dividing the amount of available 157 * tx buffers with the size of a full ethernet frame + overhead. 158 * 159 * Naturally: The higher the limit, the faster the device CAN send. 160 * However, even a slight over-commitment at the wrong time and the 161 * hardware is doomed to send all already-queued frames at suboptimal 162 * rates. This in turn leads to an enormous amount of unsuccessful 163 * retries => Latency goes up, whereas the throughput goes down. CRASH! 164 */ 165#define CARL9170_NUM_TX_LIMIT_HARD ((AR9170_TXQ_DEPTH * 3) / 2) 166#define CARL9170_NUM_TX_LIMIT_SOFT (AR9170_TXQ_DEPTH) 167 168struct carl9170_tx_queue_stats { 169 unsigned int count; 170 unsigned int limit; 171 unsigned int len; 172}; 173 174struct carl9170_vif { 175 unsigned int id; 176 struct ieee80211_vif __rcu *vif; 177}; 178 179struct carl9170_vif_info { 180 struct list_head list; 181 bool active; 182 unsigned int id; 183 struct sk_buff *beacon; 184 bool enable_beacon; 185}; 186 187#define AR9170_NUM_RX_URBS 16 188#define AR9170_NUM_RX_URBS_MUL 2 189#define AR9170_NUM_TX_URBS 8 190#define AR9170_NUM_RX_URBS_POOL (AR9170_NUM_RX_URBS_MUL * AR9170_NUM_RX_URBS) 191 192enum carl9170_device_features { 193 CARL9170_WPS_BUTTON = BIT(0), 194 CARL9170_ONE_LED = BIT(1), 195}; 196 197#ifdef CONFIG_CARL9170_LEDS 198struct ar9170; 199 200struct carl9170_led { 201 struct ar9170 *ar; 202 struct led_classdev l; 203 char name[32]; 204 unsigned int toggled; 205 bool last_state; 206 bool registered; 207}; 208#endif /* CONFIG_CARL9170_LEDS */ 209 210enum carl9170_restart_reasons { 211 CARL9170_RR_NO_REASON = 0, 212 CARL9170_RR_FATAL_FIRMWARE_ERROR, 213 CARL9170_RR_TOO_MANY_FIRMWARE_ERRORS, 214 CARL9170_RR_WATCHDOG, 215 CARL9170_RR_STUCK_TX, 216 CARL9170_RR_UNRESPONSIVE_DEVICE, 217 CARL9170_RR_COMMAND_TIMEOUT, 218 CARL9170_RR_TOO_MANY_PHY_ERRORS, 219 CARL9170_RR_LOST_RSP, 220 CARL9170_RR_INVALID_RSP, 221 CARL9170_RR_USER_REQUEST, 222 223 __CARL9170_RR_LAST, 224}; 225 226enum carl9170_erp_modes { 227 CARL9170_ERP_INVALID, 228 CARL9170_ERP_AUTO, 229 CARL9170_ERP_MAC80211, 230 CARL9170_ERP_OFF, 231 CARL9170_ERP_CTS, 232 CARL9170_ERP_RTS, 233 __CARL9170_ERP_NUM, 234}; 235 236struct ar9170 { 237 struct ath_common common; 238 struct ieee80211_hw *hw; 239 struct mutex mutex; 240 enum carl9170_device_state state; 241 spinlock_t state_lock; 242 enum carl9170_restart_reasons last_reason; 243 bool registered; 244 245 /* USB */ 246 struct usb_device *udev; 247 struct usb_interface *intf; 248 struct usb_anchor rx_anch; 249 struct usb_anchor rx_work; 250 struct usb_anchor rx_pool; 251 struct usb_anchor tx_wait; 252 struct usb_anchor tx_anch; 253 struct usb_anchor tx_cmd; 254 struct usb_anchor tx_err; 255 struct tasklet_struct usb_tasklet; 256 atomic_t tx_cmd_urbs; 257 atomic_t tx_anch_urbs; 258 atomic_t rx_anch_urbs; 259 atomic_t rx_work_urbs; 260 atomic_t rx_pool_urbs; 261 kernel_ulong_t features; 262 bool usb_ep_cmd_is_bulk; 263 264 /* firmware settings */ 265 struct completion fw_load_wait; 266 struct completion fw_boot_wait; 267 struct { 268 const struct carl9170fw_desc_head *desc; 269 const struct firmware *fw; 270 unsigned int offset; 271 unsigned int address; 272 unsigned int cmd_bufs; 273 unsigned int api_version; 274 unsigned int vif_num; 275 unsigned int err_counter; 276 unsigned int bug_counter; 277 u32 beacon_addr; 278 unsigned int beacon_max_len; 279 bool rx_stream; 280 bool tx_stream; 281 bool rx_filter; 282 bool hw_counters; 283 unsigned int mem_blocks; 284 unsigned int mem_block_size; 285 unsigned int rx_size; 286 unsigned int tx_seq_table; 287 bool ba_filter; 288 bool disable_offload_fw; 289 } fw; 290 291 /* interface configuration combinations */ 292 struct ieee80211_iface_limit if_comb_limits[1]; 293 struct ieee80211_iface_combination if_combs[1]; 294 295 /* reset / stuck frames/queue detection */ 296 struct work_struct restart_work; 297 struct work_struct ping_work; 298 unsigned int restart_counter; 299 unsigned long queue_stop_timeout[__AR9170_NUM_TXQ]; 300 unsigned long max_queue_stop_timeout[__AR9170_NUM_TXQ]; 301 bool needs_full_reset; 302 bool force_usb_reset; 303 atomic_t pending_restarts; 304 305 /* interface mode settings */ 306 struct list_head vif_list; 307 unsigned long vif_bitmap; 308 unsigned int vifs; 309 struct carl9170_vif vif_priv[AR9170_MAX_VIRTUAL_MAC]; 310 311 /* beaconing */ 312 spinlock_t beacon_lock; 313 unsigned int global_pretbtt; 314 unsigned int global_beacon_int; 315 struct carl9170_vif_info __rcu *beacon_iter; 316 unsigned int beacon_enabled; 317 318 /* cryptographic engine */ 319 u64 usedkeys; 320 bool rx_software_decryption; 321 bool disable_offload; 322 323 /* filter settings */ 324 u64 cur_mc_hash; 325 u32 cur_filter; 326 unsigned int filter_state; 327 unsigned int rx_filter_caps; 328 bool sniffer_enabled; 329 330 /* MAC */ 331 enum carl9170_erp_modes erp_mode; 332 333 /* PHY */ 334 struct ieee80211_channel *channel; 335 unsigned int num_channels; 336 int noise[4]; 337 unsigned int chan_fail; 338 unsigned int total_chan_fail; 339 u8 heavy_clip; 340 u8 ht_settings; 341 struct { 342 u64 active; /* usec */ 343 u64 cca; /* usec */ 344 u64 tx_time; /* usec */ 345 u64 rx_total; 346 u64 rx_overrun; 347 } tally; 348 struct delayed_work stat_work; 349 struct survey_info *survey; 350 351 /* power calibration data */ 352 u8 power_5G_leg[4]; 353 u8 power_2G_cck[4]; 354 u8 power_2G_ofdm[4]; 355 u8 power_5G_ht20[8]; 356 u8 power_5G_ht40[8]; 357 u8 power_2G_ht20[8]; 358 u8 power_2G_ht40[8]; 359 360#ifdef CONFIG_CARL9170_LEDS 361 /* LED */ 362 struct delayed_work led_work; 363 struct carl9170_led leds[AR9170_NUM_LEDS]; 364#endif /* CONFIG_CARL9170_LEDS */ 365 366 /* qos queue settings */ 367 spinlock_t tx_stats_lock; 368 struct carl9170_tx_queue_stats tx_stats[__AR9170_NUM_TXQ]; 369 struct ieee80211_tx_queue_params edcf[5]; 370 struct completion tx_flush; 371 372 /* CMD */ 373 int cmd_seq; 374 int readlen; 375 u8 *readbuf; 376 spinlock_t cmd_lock; 377 struct completion cmd_wait; 378 union { 379 __le32 cmd_buf[PAYLOAD_MAX + 1]; 380 struct carl9170_cmd cmd; 381 struct carl9170_rsp rsp; 382 }; 383 384 /* statistics */ 385 unsigned int tx_dropped; 386 unsigned int tx_ack_failures; 387 unsigned int tx_fcs_errors; 388 unsigned int rx_dropped; 389 390 /* EEPROM */ 391 struct ar9170_eeprom eeprom; 392 393 /* tx queuing */ 394 struct sk_buff_head tx_pending[__AR9170_NUM_TXQ]; 395 struct sk_buff_head tx_status[__AR9170_NUM_TXQ]; 396 struct delayed_work tx_janitor; 397 unsigned long tx_janitor_last_run; 398 bool tx_schedule; 399 400 /* tx ampdu */ 401 struct work_struct ampdu_work; 402 spinlock_t tx_ampdu_list_lock; 403 struct carl9170_sta_tid __rcu *tx_ampdu_iter; 404 struct list_head tx_ampdu_list; 405 atomic_t tx_ampdu_upload; 406 atomic_t tx_ampdu_scheduler; 407 atomic_t tx_total_pending; 408 atomic_t tx_total_queued; 409 unsigned int tx_ampdu_list_len; 410 int current_density; 411 int current_factor; 412 bool tx_ampdu_schedule; 413 414 /* internal memory management */ 415 spinlock_t mem_lock; 416 unsigned long *mem_bitmap; 417 atomic_t mem_free_blocks; 418 atomic_t mem_allocs; 419 420 /* rxstream mpdu merge */ 421 struct ar9170_rx_head rx_plcp; 422 bool rx_has_plcp; 423 struct sk_buff *rx_failover; 424 int rx_failover_missing; 425 u32 ampdu_ref; 426 427 /* FIFO for collecting outstanding BlockAckRequest */ 428 struct list_head bar_list[__AR9170_NUM_TXQ]; 429 spinlock_t bar_list_lock[__AR9170_NUM_TXQ]; 430 431#ifdef CONFIG_CARL9170_WPC 432 struct { 433 bool pbc_state; 434 struct input_dev *pbc; 435 char name[32]; 436 char phys[32]; 437 } wps; 438#endif /* CONFIG_CARL9170_WPC */ 439 440#ifdef CONFIG_CARL9170_DEBUGFS 441 struct carl9170_debug debug; 442 struct dentry *debug_dir; 443#endif /* CONFIG_CARL9170_DEBUGFS */ 444 445 /* PSM */ 446 struct work_struct ps_work; 447 struct { 448 unsigned int dtim_counter; 449 unsigned long last_beacon; 450 unsigned long last_action; 451 unsigned long last_slept; 452 unsigned int sleep_ms; 453 unsigned int off_override; 454 bool state; 455 } ps; 456 457#ifdef CONFIG_CARL9170_HWRNG 458# define CARL9170_HWRNG_CACHE_SIZE CARL9170_MAX_CMD_PAYLOAD_LEN 459 struct { 460 struct hwrng rng; 461 bool initialized; 462 char name[30 + 1]; 463 u16 cache[CARL9170_HWRNG_CACHE_SIZE / sizeof(u16)]; 464 unsigned int cache_idx; 465 } rng; 466#endif /* CONFIG_CARL9170_HWRNG */ 467}; 468 469enum carl9170_ps_off_override_reasons { 470 PS_OFF_VIF = BIT(0), 471 PS_OFF_BCN = BIT(1), 472}; 473 474struct carl9170_bar_list_entry { 475 struct list_head list; 476 struct rcu_head head; 477 struct sk_buff *skb; 478}; 479 480struct carl9170_ba_stats { 481 u8 ampdu_len; 482 u8 ampdu_ack_len; 483 bool clear; 484 bool req; 485}; 486 487struct carl9170_sta_info { 488 bool ht_sta; 489 bool sleeping; 490 atomic_t pending_frames; 491 unsigned int ampdu_max_len; 492 struct carl9170_sta_tid __rcu *agg[IEEE80211_NUM_TIDS]; 493 struct carl9170_ba_stats stats[IEEE80211_NUM_TIDS]; 494}; 495 496struct carl9170_tx_info { 497 unsigned long timeout; 498 struct ar9170 *ar; 499 struct kref ref; 500}; 501 502#define CHK_DEV_STATE(a, s) (((struct ar9170 *)a)->state >= (s)) 503#define IS_INITIALIZED(a) (CHK_DEV_STATE(a, CARL9170_STOPPED)) 504#define IS_ACCEPTING_CMD(a) (CHK_DEV_STATE(a, CARL9170_IDLE)) 505#define IS_STARTED(a) (CHK_DEV_STATE(a, CARL9170_STARTED)) 506 507static inline void __carl9170_set_state(struct ar9170 *ar, 508 enum carl9170_device_state newstate) 509{ 510 ar->state = newstate; 511} 512 513static inline void carl9170_set_state(struct ar9170 *ar, 514 enum carl9170_device_state newstate) 515{ 516 unsigned long flags; 517 518 spin_lock_irqsave(&ar->state_lock, flags); 519 __carl9170_set_state(ar, newstate); 520 spin_unlock_irqrestore(&ar->state_lock, flags); 521} 522 523static inline void carl9170_set_state_when(struct ar9170 *ar, 524 enum carl9170_device_state min, enum carl9170_device_state newstate) 525{ 526 unsigned long flags; 527 528 spin_lock_irqsave(&ar->state_lock, flags); 529 if (CHK_DEV_STATE(ar, min)) 530 __carl9170_set_state(ar, newstate); 531 spin_unlock_irqrestore(&ar->state_lock, flags); 532} 533 534/* exported interface */ 535void *carl9170_alloc(size_t priv_size); 536int carl9170_register(struct ar9170 *ar); 537void carl9170_unregister(struct ar9170 *ar); 538void carl9170_free(struct ar9170 *ar); 539void carl9170_restart(struct ar9170 *ar, const enum carl9170_restart_reasons r); 540void carl9170_ps_check(struct ar9170 *ar); 541 542/* USB back-end */ 543int carl9170_usb_open(struct ar9170 *ar); 544void carl9170_usb_stop(struct ar9170 *ar); 545void carl9170_usb_tx(struct ar9170 *ar, struct sk_buff *skb); 546void carl9170_usb_handle_tx_err(struct ar9170 *ar); 547int carl9170_exec_cmd(struct ar9170 *ar, const enum carl9170_cmd_oids, 548 u32 plen, void *payload, u32 rlen, void *resp); 549int __carl9170_exec_cmd(struct ar9170 *ar, struct carl9170_cmd *cmd, 550 const bool free_buf); 551int carl9170_usb_restart(struct ar9170 *ar); 552void carl9170_usb_reset(struct ar9170 *ar); 553 554/* MAC */ 555int carl9170_init_mac(struct ar9170 *ar); 556int carl9170_set_qos(struct ar9170 *ar); 557int carl9170_update_multicast(struct ar9170 *ar, const u64 mc_hast); 558int carl9170_mod_virtual_mac(struct ar9170 *ar, const unsigned int id, 559 const u8 *mac); 560int carl9170_set_operating_mode(struct ar9170 *ar); 561int carl9170_set_beacon_timers(struct ar9170 *ar); 562int carl9170_set_dyn_sifs_ack(struct ar9170 *ar); 563int carl9170_set_rts_cts_rate(struct ar9170 *ar); 564int carl9170_set_ampdu_settings(struct ar9170 *ar); 565int carl9170_set_slot_time(struct ar9170 *ar); 566int carl9170_set_mac_rates(struct ar9170 *ar); 567int carl9170_set_hwretry_limit(struct ar9170 *ar, const u32 max_retry); 568int carl9170_upload_key(struct ar9170 *ar, const u8 id, const u8 *mac, 569 const u8 ktype, const u8 keyidx, const u8 *keydata, const int keylen); 570int carl9170_disable_key(struct ar9170 *ar, const u8 id); 571int carl9170_set_mac_tpc(struct ar9170 *ar, struct ieee80211_channel *channel); 572 573/* RX */ 574void carl9170_rx(struct ar9170 *ar, void *buf, unsigned int len); 575void carl9170_handle_command_response(struct ar9170 *ar, void *buf, u32 len); 576 577/* TX */ 578void carl9170_op_tx(struct ieee80211_hw *hw, 579 struct ieee80211_tx_control *control, 580 struct sk_buff *skb); 581void carl9170_tx_janitor(struct work_struct *work); 582void carl9170_tx_process_status(struct ar9170 *ar, 583 const struct carl9170_rsp *cmd); 584void carl9170_tx_status(struct ar9170 *ar, struct sk_buff *skb, 585 const bool success); 586void carl9170_tx_callback(struct ar9170 *ar, struct sk_buff *skb); 587void carl9170_tx_drop(struct ar9170 *ar, struct sk_buff *skb); 588void carl9170_tx_scheduler(struct ar9170 *ar); 589void carl9170_tx_get_skb(struct sk_buff *skb); 590int carl9170_tx_put_skb(struct sk_buff *skb); 591int carl9170_update_beacon(struct ar9170 *ar, const bool submit); 592 593/* LEDs */ 594#ifdef CONFIG_CARL9170_LEDS 595int carl9170_led_register(struct ar9170 *ar); 596void carl9170_led_unregister(struct ar9170 *ar); 597#endif /* CONFIG_CARL9170_LEDS */ 598int carl9170_led_init(struct ar9170 *ar); 599int carl9170_led_set_state(struct ar9170 *ar, const u32 led_state); 600 601/* PHY / RF */ 602int carl9170_set_channel(struct ar9170 *ar, struct ieee80211_channel *channel, 603 enum nl80211_channel_type bw); 604int carl9170_get_noisefloor(struct ar9170 *ar); 605 606/* FW */ 607int carl9170_parse_firmware(struct ar9170 *ar); 608 609extern struct ieee80211_rate __carl9170_ratetable[]; 610extern int modparam_noht; 611 612static inline struct ar9170 *carl9170_get_priv(struct carl9170_vif *carl_vif) 613{ 614 return container_of(carl_vif, struct ar9170, 615 vif_priv[carl_vif->id]); 616} 617 618static inline struct ieee80211_hdr *carl9170_get_hdr(struct sk_buff *skb) 619{ 620 return (void *)((struct _carl9170_tx_superframe *) 621 skb->data)->frame_data; 622} 623 624static inline u16 get_seq_h(struct ieee80211_hdr *hdr) 625{ 626 return le16_to_cpu(hdr->seq_ctrl) >> 4; 627} 628 629static inline u16 carl9170_get_seq(struct sk_buff *skb) 630{ 631 return get_seq_h(carl9170_get_hdr(skb)); 632} 633 634static inline u16 get_tid_h(struct ieee80211_hdr *hdr) 635{ 636 return (ieee80211_get_qos_ctl(hdr))[0] & IEEE80211_QOS_CTL_TID_MASK; 637} 638 639static inline u16 carl9170_get_tid(struct sk_buff *skb) 640{ 641 return get_tid_h(carl9170_get_hdr(skb)); 642} 643 644static inline struct ieee80211_vif * 645carl9170_get_vif(struct carl9170_vif_info *priv) 646{ 647 return container_of((void *)priv, struct ieee80211_vif, drv_priv); 648} 649 650/* Protected by ar->mutex or RCU */ 651static inline struct ieee80211_vif *carl9170_get_main_vif(struct ar9170 *ar) 652{ 653 struct carl9170_vif_info *cvif; 654 655 list_for_each_entry_rcu(cvif, &ar->vif_list, list) { 656 if (cvif->active) 657 return carl9170_get_vif(cvif); 658 } 659 660 return NULL; 661} 662 663static inline bool is_main_vif(struct ar9170 *ar, struct ieee80211_vif *vif) 664{ 665 bool ret; 666 667 rcu_read_lock(); 668 ret = (carl9170_get_main_vif(ar) == vif); 669 rcu_read_unlock(); 670 return ret; 671} 672 673#endif /* __CARL9170_H */ 674