drivers/net/wireless/ath/carl9170/carl9170.h

   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 <net/cfg80211.h>
  47 #include <net/mac80211.h>
  48 #include <linux/usb.h>
  49 #ifdef CONFIG_CARL9170_LEDS
  50 #include <linux/leds.h>
  51 #endif /* CONFIG_CARL9170_LEDS */
  52 #ifdef CONFIG_CARL9170_WPC
  53 #include <linux/input.h>
  54 #endif /* CONFIG_CARL9170_WPC */
  55 #include "eeprom.h"
  56 #include "wlan.h"
  57 #include "hw.h"
  58 #include "fwdesc.h"
  59 #include "fwcmd.h"
  60 #include "../regd.h"
  61
  62 #ifdef CONFIG_CARL9170_DEBUGFS
  63 #include "debug.h"
  64 #endif /* CONFIG_CARL9170_DEBUGFS */
  65
  66 #define CARL9170FW_NAME "carl9170-1.fw"
  67
  68 #define PAYLOAD_MAX     (CARL9170_MAX_CMD_LEN / 4 - 1)
  69
  70 enum carl9170_rf_init_mode {
  71         CARL9170_RFI_NONE,
  72         CARL9170_RFI_WARM,
  73         CARL9170_RFI_COLD,
  74 };
  75
  76 #define CARL9170_MAX_RX_BUFFER_SIZE             8192
  77
  78 enum carl9170_device_state {
  79         CARL9170_UNKNOWN_STATE,
  80         CARL9170_STOPPED,
  81         CARL9170_IDLE,
  82         CARL9170_STARTED,
  83 };
  84
  85 #define CARL9170_NUM_TID                16
  86 #define WME_BA_BMP_SIZE                 64
  87 #define CARL9170_TX_USER_RATE_TRIES     3
  88
  89 #define WME_AC_BE   2
  90 #define WME_AC_BK   3
  91 #define WME_AC_VI   1
  92 #define WME_AC_VO   0
  93
  94 #define TID_TO_WME_AC(_tid)                             \
  95         ((((_tid) == 0) || ((_tid) == 3)) ? WME_AC_BE : \
  96          (((_tid) == 1) || ((_tid) == 2)) ? WME_AC_BK : \
  97          (((_tid) == 4) || ((_tid) == 5)) ? WME_AC_VI : \
  98          WME_AC_VO)
  99
 100 #define SEQ_DIFF(_start, _seq) \
 101         (((_start) - (_seq)) & 0x0fff)
 102 #define SEQ_PREV(_seq) \
 103         (((_seq) - 1) & 0x0fff)
 104 #define SEQ_NEXT(_seq) \
 105         (((_seq) + 1) & 0x0fff)
 106 #define BAW_WITHIN(_start, _bawsz, _seqno) \
 107         ((((_seqno) - (_start)) & 0xfff) < (_bawsz))
 108
 109 enum carl9170_tid_state {
 110         CARL9170_TID_STATE_INVALID,
 111         CARL9170_TID_STATE_KILLED,
 112         CARL9170_TID_STATE_SHUTDOWN,
 113         CARL9170_TID_STATE_SUSPEND,
 114         CARL9170_TID_STATE_PROGRESS,
 115         CARL9170_TID_STATE_IDLE,
 116         CARL9170_TID_STATE_XMIT,
 117 };
 118
 119 #define CARL9170_BAW_BITS (2 * WME_BA_BMP_SIZE)
 120 #define CARL9170_BAW_SIZE (BITS_TO_LONGS(CARL9170_BAW_BITS))
 121 #define CARL9170_BAW_LEN (DIV_ROUND_UP(CARL9170_BAW_BITS, BITS_PER_BYTE))
 122
 123 struct carl9170_sta_tid {
 124         /* must be the first entry! */
 125         struct list_head list;
 126
 127         /* temporary list for RCU unlink procedure */
 128         struct list_head tmp_list;
 129
 130         /* lock for the following data structures */
 131         spinlock_t lock;
 132
 133         unsigned int counter;
 134         enum carl9170_tid_state state;
 135         u8 tid;         /* TID number ( 0 - 15 ) */
 136         u16 max;        /* max. AMPDU size */
 137
 138         u16 snx;        /* awaiting _next_ frame */
 139         u16 hsn;        /* highest _queued_ sequence */
 140         u16 bsn;        /* base of the tx/agg bitmap */
 141         unsigned long bitmap[CARL9170_BAW_SIZE];
 142
 143         /* Preaggregation reorder queue */
 144         struct sk_buff_head queue;
 145 };
 146
 147 #define CARL9170_QUEUE_TIMEOUT          256
 148 #define CARL9170_BUMP_QUEUE             1000
 149 #define CARL9170_TX_TIMEOUT             2500
 150 #define CARL9170_JANITOR_DELAY          128
 151 #define CARL9170_QUEUE_STUCK_TIMEOUT    5500
 152
 153 #define CARL9170_NUM_TX_AGG_MAX         30
 154
 155 /*
 156  * Tradeoff between stability/latency and speed.
 157  *
 158  * AR9170_TXQ_DEPTH is devised by dividing the amount of available
 159  * tx buffers with the size of a full ethernet frame + overhead.
 160  *
 161  * Naturally: The higher the limit, the faster the device CAN send.
 162  * However, even a slight over-commitment at the wrong time and the
 163  * hardware is doomed to send all already-queued frames at suboptimal
 164  * rates. This in turn leads to an enourmous amount of unsuccessful
 165  * retries => Latency goes up, whereas the throughput goes down. CRASH!
 166  */
 167 #define CARL9170_NUM_TX_LIMIT_HARD      ((AR9170_TXQ_DEPTH * 3) / 2)
 168 #define CARL9170_NUM_TX_LIMIT_SOFT      (AR9170_TXQ_DEPTH)
 169
 170 struct carl9170_tx_queue_stats {
 171         unsigned int count;
 172         unsigned int limit;
 173         unsigned int len;
 174 };
 175
 176 struct carl9170_vif {
 177         unsigned int id;
 178         struct ieee80211_vif *vif;
 179 };
 180
 181 struct carl9170_vif_info {
 182         struct list_head list;
 183         bool active;
 184         unsigned int id;
 185         struct sk_buff *beacon;
 186         bool enable_beacon;
 187 };
 188
 189 #define AR9170_NUM_RX_URBS      16
 190 #define AR9170_NUM_RX_URBS_MUL  2
 191 #define AR9170_NUM_TX_URBS      8
 192 #define AR9170_NUM_RX_URBS_POOL (AR9170_NUM_RX_URBS_MUL * AR9170_NUM_RX_URBS)
 193
 194 enum carl9170_device_features {
 195         CARL9170_WPS_BUTTON             = BIT(0),
 196         CARL9170_ONE_LED                = BIT(1),
 197 };
 198
 199 #ifdef CONFIG_CARL9170_LEDS
 200 struct ar9170;
 201
 202 struct carl9170_led {
 203         struct ar9170 *ar;
 204         struct led_classdev l;
 205         char name[32];
 206         unsigned int toggled;
 207         bool last_state;
 208         bool registered;
 209 };
 210 #endif /* CONFIG_CARL9170_LEDS */
 211
 212 enum carl9170_restart_reasons {
 213         CARL9170_RR_NO_REASON = 0,
 214         CARL9170_RR_FATAL_FIRMWARE_ERROR,
 215         CARL9170_RR_TOO_MANY_FIRMWARE_ERRORS,
 216         CARL9170_RR_WATCHDOG,
 217         CARL9170_RR_STUCK_TX,
 218         CARL9170_RR_UNRESPONSIVE_DEVICE,
 219         CARL9170_RR_COMMAND_TIMEOUT,
 220         CARL9170_RR_TOO_MANY_PHY_ERRORS,
 221         CARL9170_RR_LOST_RSP,
 222         CARL9170_RR_INVALID_RSP,
 223         CARL9170_RR_USER_REQUEST,
 224
 225         __CARL9170_RR_LAST,
 226 };
 227
 228 enum carl9170_erp_modes {
 229         CARL9170_ERP_INVALID,
 230         CARL9170_ERP_AUTO,
 231         CARL9170_ERP_MAC80211,
 232         CARL9170_ERP_OFF,
 233         CARL9170_ERP_CTS,
 234         CARL9170_ERP_RTS,
 235         __CARL9170_ERP_NUM,
 236 };
 237
 238 struct ar9170 {
 239         struct ath_common common;
 240         struct ieee80211_hw *hw;
 241         struct mutex mutex;
 242         enum carl9170_device_state state;
 243         spinlock_t state_lock;
 244         enum carl9170_restart_reasons last_reason;
 245         bool registered;
 246
 247         /* USB */
 248         struct usb_device *udev;
 249         struct usb_interface *intf;
 250         struct usb_anchor rx_anch;
 251         struct usb_anchor rx_work;
 252         struct usb_anchor rx_pool;
 253         struct usb_anchor tx_wait;
 254         struct usb_anchor tx_anch;
 255         struct usb_anchor tx_cmd;
 256         struct usb_anchor tx_err;
 257         struct tasklet_struct usb_tasklet;
 258         atomic_t tx_cmd_urbs;
 259         atomic_t tx_anch_urbs;
 260         atomic_t rx_anch_urbs;
 261         atomic_t rx_work_urbs;
 262         atomic_t rx_pool_urbs;
 263         kernel_ulong_t features;
 264
 265         /* firmware settings */
 266         struct completion fw_load_wait;
 267         struct completion fw_boot_wait;
 268         struct {
 269                 const struct carl9170fw_desc_head *desc;
 270                 const struct firmware *fw;
 271                 unsigned int offset;
 272                 unsigned int address;
 273                 unsigned int cmd_bufs;
 274                 unsigned int api_version;
 275                 unsigned int vif_num;
 276                 unsigned int err_counter;
 277                 unsigned int bug_counter;
 278                 u32 beacon_addr;
 279                 unsigned int beacon_max_len;
 280                 bool rx_stream;
 281                 bool tx_stream;
 282                 bool rx_filter;
 283                 unsigned int mem_blocks;
 284                 unsigned int mem_block_size;
 285                 unsigned int rx_size;
 286         } fw;
 287
 288         /* reset / stuck frames/queue detection */
 289         struct work_struct restart_work;
 290         struct work_struct ping_work;
 291         unsigned int restart_counter;
 292         unsigned long queue_stop_timeout[__AR9170_NUM_TXQ];
 293         unsigned long max_queue_stop_timeout[__AR9170_NUM_TXQ];
 294         bool needs_full_reset;
 295         atomic_t pending_restarts;
 296
 297         /* interface mode settings */
 298         struct list_head vif_list;
 299         unsigned long vif_bitmap;
 300         unsigned int vifs;
 301         struct carl9170_vif vif_priv[AR9170_MAX_VIRTUAL_MAC];
 302
 303         /* beaconing */
 304         spinlock_t beacon_lock;
 305         unsigned int global_pretbtt;
 306         unsigned int global_beacon_int;
 307         struct carl9170_vif_info *beacon_iter;
 308         unsigned int beacon_enabled;
 309
 310         /* cryptographic engine */
 311         u64 usedkeys;
 312         bool rx_software_decryption;
 313         bool disable_offload;
 314
 315         /* filter settings */
 316         u64 cur_mc_hash;
 317         u32 cur_filter;
 318         unsigned int filter_state;
 319         unsigned int rx_filter_caps;
 320         bool sniffer_enabled;
 321
 322         /* MAC */
 323         enum carl9170_erp_modes erp_mode;
 324
 325         /* PHY */
 326         struct ieee80211_channel *channel;
 327         int noise[4];
 328         unsigned int chan_fail;
 329         unsigned int total_chan_fail;
 330         u8 heavy_clip;
 331         u8 ht_settings;
 332
 333         /* power calibration data */
 334         u8 power_5G_leg[4];
 335         u8 power_2G_cck[4];
 336         u8 power_2G_ofdm[4];
 337         u8 power_5G_ht20[8];
 338         u8 power_5G_ht40[8];
 339         u8 power_2G_ht20[8];
 340         u8 power_2G_ht40[8];
 341
 342 #ifdef CONFIG_CARL9170_LEDS
 343         /* LED */
 344         struct delayed_work led_work;
 345         struct carl9170_led leds[AR9170_NUM_LEDS];
 346 #endif /* CONFIG_CARL9170_LEDS */
 347
 348         /* qos queue settings */
 349         spinlock_t tx_stats_lock;
 350         struct carl9170_tx_queue_stats tx_stats[__AR9170_NUM_TXQ];
 351         struct ieee80211_tx_queue_params edcf[5];
 352         struct completion tx_flush;
 353
 354         /* CMD */
 355         int cmd_seq;
 356         int readlen;
 357         u8 *readbuf;
 358         spinlock_t cmd_lock;
 359         struct completion cmd_wait;
 360         union {
 361                 __le32 cmd_buf[PAYLOAD_MAX + 1];
 362                 struct carl9170_cmd cmd;
 363                 struct carl9170_rsp rsp;
 364         };
 365
 366         /* statistics */
 367         unsigned int tx_dropped;
 368         unsigned int tx_ack_failures;
 369         unsigned int tx_fcs_errors;
 370         unsigned int rx_dropped;
 371
 372         /* EEPROM */
 373         struct ar9170_eeprom eeprom;
 374
 375         /* tx queuing */
 376         struct sk_buff_head tx_pending[__AR9170_NUM_TXQ];
 377         struct sk_buff_head tx_status[__AR9170_NUM_TXQ];
 378         struct delayed_work tx_janitor;
 379         unsigned long tx_janitor_last_run;
 380         bool tx_schedule;
 381
 382         /* tx ampdu */
 383         struct work_struct ampdu_work;
 384         spinlock_t tx_ampdu_list_lock;
 385         struct carl9170_sta_tid *tx_ampdu_iter;
 386         struct list_head tx_ampdu_list;
 387         atomic_t tx_ampdu_upload;
 388         atomic_t tx_ampdu_scheduler;
 389         atomic_t tx_total_pending;
 390         atomic_t tx_total_queued;
 391         unsigned int tx_ampdu_list_len;
 392         int current_density;
 393         int current_factor;
 394         bool tx_ampdu_schedule;
 395
 396         /* internal memory management */
 397         spinlock_t mem_lock;
 398         unsigned long *mem_bitmap;
 399         atomic_t mem_free_blocks;
 400         atomic_t mem_allocs;
 401
 402         /* rxstream mpdu merge */
 403         struct ar9170_rx_head rx_plcp;
 404         bool rx_has_plcp;
 405         struct sk_buff *rx_failover;
 406         int rx_failover_missing;
 407
 408 #ifdef CONFIG_CARL9170_WPC
 409         struct {
 410                 bool pbc_state;
 411                 struct input_dev *pbc;
 412                 char name[32];
 413                 char phys[32];
 414         } wps;
 415 #endif /* CONFIG_CARL9170_WPC */
 416
 417 #ifdef CONFIG_CARL9170_DEBUGFS
 418         struct carl9170_debug debug;
 419         struct dentry *debug_dir;
 420 #endif /* CONFIG_CARL9170_DEBUGFS */
 421
 422         /* PSM */
 423         struct work_struct ps_work;
 424         struct {
 425                 unsigned int dtim_counter;
 426                 unsigned long last_beacon;
 427                 unsigned long last_action;
 428                 unsigned long last_slept;
 429                 unsigned int sleep_ms;
 430                 unsigned int off_override;
 431                 bool state;
 432         } ps;
 433 };
 434
 435 enum carl9170_ps_off_override_reasons {
 436         PS_OFF_VIF      = BIT(0),
 437         PS_OFF_BCN      = BIT(1),
 438         PS_OFF_5GHZ     = BIT(2),
 439 };
 440
 441 struct carl9170_ba_stats {
 442         u8 ampdu_len;
 443         u8 ampdu_ack_len;
 444         bool clear;
 445 };
 446
 447 struct carl9170_sta_info {
 448         bool ht_sta;
 449         unsigned int ampdu_max_len;
 450         struct carl9170_sta_tid *agg[CARL9170_NUM_TID];
 451         struct carl9170_ba_stats stats[CARL9170_NUM_TID];
 452 };
 453
 454 struct carl9170_tx_info {
 455         unsigned long timeout;
 456         struct ar9170 *ar;
 457         struct kref ref;
 458 };
 459
 460 #define CHK_DEV_STATE(a, s)     (((struct ar9170 *)a)->state >= (s))
 461 #define IS_INITIALIZED(a)       (CHK_DEV_STATE(a, CARL9170_STOPPED))
 462 #define IS_ACCEPTING_CMD(a)     (CHK_DEV_STATE(a, CARL9170_IDLE))
 463 #define IS_STARTED(a)           (CHK_DEV_STATE(a, CARL9170_STARTED))
 464
 465 static inline void __carl9170_set_state(struct ar9170 *ar,
 466         enum carl9170_device_state newstate)
 467 {
 468         ar->state = newstate;
 469 }
 470
 471 static inline void carl9170_set_state(struct ar9170 *ar,
 472         enum carl9170_device_state newstate)
 473 {
 474         unsigned long flags;
 475
 476         spin_lock_irqsave(&ar->state_lock, flags);
 477         __carl9170_set_state(ar, newstate);
 478         spin_unlock_irqrestore(&ar->state_lock, flags);
 479 }
 480
 481 static inline void carl9170_set_state_when(struct ar9170 *ar,
 482         enum carl9170_device_state min, enum carl9170_device_state newstate)
 483 {
 484         unsigned long flags;
 485
 486         spin_lock_irqsave(&ar->state_lock, flags);
 487         if (CHK_DEV_STATE(ar, min))
 488                 __carl9170_set_state(ar, newstate);
 489         spin_unlock_irqrestore(&ar->state_lock, flags);
 490 }
 491
 492 /* exported interface */
 493 void *carl9170_alloc(size_t priv_size);
 494 int carl9170_register(struct ar9170 *ar);
 495 void carl9170_unregister(struct ar9170 *ar);
 496 void carl9170_free(struct ar9170 *ar);
 497 void carl9170_restart(struct ar9170 *ar, const enum carl9170_restart_reasons r);
 498 void carl9170_ps_check(struct ar9170 *ar);
 499
 500 /* USB back-end */
 501 int carl9170_usb_open(struct ar9170 *ar);
 502 void carl9170_usb_stop(struct ar9170 *ar);
 503 void carl9170_usb_tx(struct ar9170 *ar, struct sk_buff *skb);
 504 void carl9170_usb_handle_tx_err(struct ar9170 *ar);
 505 int carl9170_exec_cmd(struct ar9170 *ar, const enum carl9170_cmd_oids,
 506                       u32 plen, void *payload, u32 rlen, void *resp);
 507 int __carl9170_exec_cmd(struct ar9170 *ar, struct carl9170_cmd *cmd,
 508                         const bool free_buf);
 509 int carl9170_usb_restart(struct ar9170 *ar);
 510 void carl9170_usb_reset(struct ar9170 *ar);
 511
 512 /* MAC */
 513 int carl9170_init_mac(struct ar9170 *ar);
 514 int carl9170_set_qos(struct ar9170 *ar);
 515 int carl9170_update_multicast(struct ar9170 *ar, const u64 mc_hast);
 516 int carl9170_mod_virtual_mac(struct ar9170 *ar, const unsigned int id,
 517                              const u8 *mac);
 518 int carl9170_set_operating_mode(struct ar9170 *ar);
 519 int carl9170_set_beacon_timers(struct ar9170 *ar);
 520 int carl9170_set_dyn_sifs_ack(struct ar9170 *ar);
 521 int carl9170_set_rts_cts_rate(struct ar9170 *ar);
 522 int carl9170_set_ampdu_settings(struct ar9170 *ar);
 523 int carl9170_set_slot_time(struct ar9170 *ar);
 524 int carl9170_set_mac_rates(struct ar9170 *ar);
 525 int carl9170_set_hwretry_limit(struct ar9170 *ar, const u32 max_retry);
 526 int carl9170_update_beacon(struct ar9170 *ar, const bool submit);
 527 int carl9170_upload_key(struct ar9170 *ar, const u8 id, const u8 *mac,
 528         const u8 ktype, const u8 keyidx, const u8 *keydata, const int keylen);
 529 int carl9170_disable_key(struct ar9170 *ar, const u8 id);
 530
 531 /* RX */
 532 void carl9170_rx(struct ar9170 *ar, void *buf, unsigned int len);
 533 void carl9170_handle_command_response(struct ar9170 *ar, void *buf, u32 len);
 534
 535 /* TX */
 536 int carl9170_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb);
 537 void carl9170_tx_janitor(struct work_struct *work);
 538 void carl9170_tx_process_status(struct ar9170 *ar,
 539                                 const struct carl9170_rsp *cmd);
 540 void carl9170_tx_status(struct ar9170 *ar, struct sk_buff *skb,
 541                         const bool success);
 542 void carl9170_tx_callback(struct ar9170 *ar, struct sk_buff *skb);
 543 void carl9170_tx_drop(struct ar9170 *ar, struct sk_buff *skb);
 544 void carl9170_tx_scheduler(struct ar9170 *ar);
 545 void carl9170_tx_get_skb(struct sk_buff *skb);
 546 int carl9170_tx_put_skb(struct sk_buff *skb);
 547
 548 /* LEDs */
 549 #ifdef CONFIG_CARL9170_LEDS
 550 int carl9170_led_register(struct ar9170 *ar);
 551 void carl9170_led_unregister(struct ar9170 *ar);
 552 #endif /* CONFIG_CARL9170_LEDS */
 553 int carl9170_led_init(struct ar9170 *ar);
 554 int carl9170_led_set_state(struct ar9170 *ar, const u32 led_state);
 555
 556 /* PHY / RF */
 557 int carl9170_set_channel(struct ar9170 *ar, struct ieee80211_channel *channel,
 558         enum nl80211_channel_type bw, enum carl9170_rf_init_mode rfi);
 559 int carl9170_get_noisefloor(struct ar9170 *ar);
 560
 561 /* FW */
 562 int carl9170_parse_firmware(struct ar9170 *ar);
 563 int carl9170_fw_fix_eeprom(struct ar9170 *ar);
 564
 565 extern struct ieee80211_rate __carl9170_ratetable[];
 566 extern int modparam_noht;
 567
 568 static inline struct ar9170 *carl9170_get_priv(struct carl9170_vif *carl_vif)
 569 {
 570         return container_of(carl_vif, struct ar9170,
 571                             vif_priv[carl_vif->id]);
 572 }
 573
 574 static inline struct ieee80211_hdr *carl9170_get_hdr(struct sk_buff *skb)
 575 {
 576         return (void *)((struct _carl9170_tx_superframe *)
 577                 skb->data)->frame_data;
 578 }
 579
 580 static inline u16 get_seq_h(struct ieee80211_hdr *hdr)
 581 {
 582         return le16_to_cpu(hdr->seq_ctrl) >> 4;
 583 }
 584
 585 static inline u16 carl9170_get_seq(struct sk_buff *skb)
 586 {
 587         return get_seq_h(carl9170_get_hdr(skb));
 588 }
 589
 590 static inline u16 get_tid_h(struct ieee80211_hdr *hdr)
 591 {
 592         return (ieee80211_get_qos_ctl(hdr))[0] & IEEE80211_QOS_CTL_TID_MASK;
 593 }
 594
 595 static inline u16 carl9170_get_tid(struct sk_buff *skb)
 596 {
 597         return get_tid_h(carl9170_get_hdr(skb));
 598 }
 599
 600 static inline struct ieee80211_vif *
 601 carl9170_get_vif(struct carl9170_vif_info *priv)
 602 {
 603         return container_of((void *)priv, struct ieee80211_vif, drv_priv);
 604 }
 605
 606 /* Protected by ar->mutex or RCU */
 607 static inline struct ieee80211_vif *carl9170_get_main_vif(struct ar9170 *ar)
 608 {
 609         struct carl9170_vif_info *cvif;
 610
 611         list_for_each_entry_rcu(cvif, &ar->vif_list, list) {
 612                 if (cvif->active)
 613                         return carl9170_get_vif(cvif);
 614         }
 615
 616         return NULL;
 617 }
 618
 619 static inline bool is_main_vif(struct ar9170 *ar, struct ieee80211_vif *vif)
 620 {
 621         bool ret;
 622
 623         rcu_read_lock();
 624         ret = (carl9170_get_main_vif(ar) == vif);
 625         rcu_read_unlock();
 626         return ret;
 627 }
 628
 629 #endif /* __CARL9170_H */