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 static const u8 ar9170_qmap[__AR9170_NUM_TXQ] = { 3, 2, 1, 0 }; 71 72 enum carl9170_rf_init_mode { 73 CARL9170_RFI_NONE, 74 CARL9170_RFI_WARM, 75 CARL9170_RFI_COLD, 76 }; 77 78 #define CARL9170_MAX_RX_BUFFER_SIZE 8192 79 80 enum carl9170_device_state { 81 CARL9170_UNKNOWN_STATE, 82 CARL9170_STOPPED, 83 CARL9170_IDLE, 84 CARL9170_STARTED, 85 }; 86 87 #define CARL9170_NUM_TID 16 88 #define WME_BA_BMP_SIZE 64 89 #define CARL9170_TX_USER_RATE_TRIES 3 90 91 #define WME_AC_BE 2 92 #define WME_AC_BK 3 93 #define WME_AC_VI 1 94 #define WME_AC_VO 0 95 96 #define TID_TO_WME_AC(_tid) \ 97 ((((_tid) == 0) || ((_tid) == 3)) ? WME_AC_BE : \ 98 (((_tid) == 1) || ((_tid) == 2)) ? WME_AC_BK : \ 99 (((_tid) == 4) || ((_tid) == 5)) ? WME_AC_VI : \ 100 WME_AC_VO) 101 102 #define SEQ_DIFF(_start, _seq) \ 103 (((_start) - (_seq)) & 0x0fff) 104 #define SEQ_PREV(_seq) \ 105 (((_seq) - 1) & 0x0fff) 106 #define SEQ_NEXT(_seq) \ 107 (((_seq) + 1) & 0x0fff) 108 #define BAW_WITHIN(_start, _bawsz, _seqno) \ 109 ((((_seqno) - (_start)) & 0xfff) < (_bawsz)) 110 111 enum carl9170_tid_state { 112 CARL9170_TID_STATE_INVALID, 113 CARL9170_TID_STATE_KILLED, 114 CARL9170_TID_STATE_SHUTDOWN, 115 CARL9170_TID_STATE_SUSPEND, 116 CARL9170_TID_STATE_PROGRESS, 117 CARL9170_TID_STATE_IDLE, 118 CARL9170_TID_STATE_XMIT, 119 }; 120 121 #define CARL9170_BAW_BITS (2 * WME_BA_BMP_SIZE) 122 #define CARL9170_BAW_SIZE (BITS_TO_LONGS(CARL9170_BAW_BITS)) 123 #define CARL9170_BAW_LEN (DIV_ROUND_UP(CARL9170_BAW_BITS, BITS_PER_BYTE)) 124 125 struct carl9170_sta_tid { 126 /* must be the first entry! */ 127 struct list_head list; 128 129 /* temporary list for RCU unlink procedure */ 130 struct list_head tmp_list; 131 132 /* lock for the following data structures */ 133 spinlock_t lock; 134 135 unsigned int counter; 136 enum carl9170_tid_state state; 137 u8 tid; /* TID number ( 0 - 15 ) */ 138 u16 max; /* max. AMPDU size */ 139 140 u16 snx; /* awaiting _next_ frame */ 141 u16 hsn; /* highest _queued_ sequence */ 142 u16 bsn; /* base of the tx/agg bitmap */ 143 unsigned long bitmap[CARL9170_BAW_SIZE]; 144 145 /* Preaggregation reorder queue */ 146 struct sk_buff_head queue; 147 }; 148 149 #define CARL9170_QUEUE_TIMEOUT 256 150 #define CARL9170_BUMP_QUEUE 1000 151 #define CARL9170_TX_TIMEOUT 2500 152 #define CARL9170_JANITOR_DELAY 128 153 #define CARL9170_QUEUE_STUCK_TIMEOUT 5500 154 155 #define CARL9170_NUM_TX_AGG_MAX 30 156 157 /* 158 * Tradeoff between stability/latency and speed. 159 * 160 * AR9170_TXQ_DEPTH is devised by dividing the amount of available 161 * tx buffers with the size of a full ethernet frame + overhead. 162 * 163 * Naturally: The higher the limit, the faster the device CAN send. 164 * However, even a slight over-commitment at the wrong time and the 165 * hardware is doomed to send all already-queued frames at suboptimal 166 * rates. This in turn leads to an enormous amount of unsuccessful 167 * retries => Latency goes up, whereas the throughput goes down. CRASH! 168 */ 169 #define CARL9170_NUM_TX_LIMIT_HARD ((AR9170_TXQ_DEPTH * 3) / 2) 170 #define CARL9170_NUM_TX_LIMIT_SOFT (AR9170_TXQ_DEPTH) 171 172 struct carl9170_tx_queue_stats { 173 unsigned int count; 174 unsigned int limit; 175 unsigned int len; 176 }; 177 178 struct carl9170_vif { 179 unsigned int id; 180 struct ieee80211_vif *vif; 181 }; 182 183 struct carl9170_vif_info { 184 struct list_head list; 185 bool active; 186 unsigned int id; 187 struct sk_buff *beacon; 188 bool enable_beacon; 189 }; 190 191 #define AR9170_NUM_RX_URBS 16 192 #define AR9170_NUM_RX_URBS_MUL 2 193 #define AR9170_NUM_TX_URBS 8 194 #define AR9170_NUM_RX_URBS_POOL (AR9170_NUM_RX_URBS_MUL * AR9170_NUM_RX_URBS) 195 196 enum carl9170_device_features { 197 CARL9170_WPS_BUTTON = BIT(0), 198 CARL9170_ONE_LED = BIT(1), 199 }; 200 201 #ifdef CONFIG_CARL9170_LEDS 202 struct ar9170; 203 204 struct carl9170_led { 205 struct ar9170 *ar; 206 struct led_classdev l; 207 char name[32]; 208 unsigned int toggled; 209 bool last_state; 210 bool registered; 211 }; 212 #endif /* CONFIG_CARL9170_LEDS */ 213 214 enum carl9170_restart_reasons { 215 CARL9170_RR_NO_REASON = 0, 216 CARL9170_RR_FATAL_FIRMWARE_ERROR, 217 CARL9170_RR_TOO_MANY_FIRMWARE_ERRORS, 218 CARL9170_RR_WATCHDOG, 219 CARL9170_RR_STUCK_TX, 220 CARL9170_RR_UNRESPONSIVE_DEVICE, 221 CARL9170_RR_COMMAND_TIMEOUT, 222 CARL9170_RR_TOO_MANY_PHY_ERRORS, 223 CARL9170_RR_LOST_RSP, 224 CARL9170_RR_INVALID_RSP, 225 CARL9170_RR_USER_REQUEST, 226 227 __CARL9170_RR_LAST, 228 }; 229 230 enum carl9170_erp_modes { 231 CARL9170_ERP_INVALID, 232 CARL9170_ERP_AUTO, 233 CARL9170_ERP_MAC80211, 234 CARL9170_ERP_OFF, 235 CARL9170_ERP_CTS, 236 CARL9170_ERP_RTS, 237 __CARL9170_ERP_NUM, 238 }; 239 240 struct ar9170 { 241 struct ath_common common; 242 struct ieee80211_hw *hw; 243 struct mutex mutex; 244 enum carl9170_device_state state; 245 spinlock_t state_lock; 246 enum carl9170_restart_reasons last_reason; 247 bool registered; 248 249 /* USB */ 250 struct usb_device *udev; 251 struct usb_interface *intf; 252 struct usb_anchor rx_anch; 253 struct usb_anchor rx_work; 254 struct usb_anchor rx_pool; 255 struct usb_anchor tx_wait; 256 struct usb_anchor tx_anch; 257 struct usb_anchor tx_cmd; 258 struct usb_anchor tx_err; 259 struct tasklet_struct usb_tasklet; 260 atomic_t tx_cmd_urbs; 261 atomic_t tx_anch_urbs; 262 atomic_t rx_anch_urbs; 263 atomic_t rx_work_urbs; 264 atomic_t rx_pool_urbs; 265 kernel_ulong_t features; 266 267 /* firmware settings */ 268 struct completion fw_load_wait; 269 struct completion fw_boot_wait; 270 struct { 271 const struct carl9170fw_desc_head *desc; 272 const struct firmware *fw; 273 unsigned int offset; 274 unsigned int address; 275 unsigned int cmd_bufs; 276 unsigned int api_version; 277 unsigned int vif_num; 278 unsigned int err_counter; 279 unsigned int bug_counter; 280 u32 beacon_addr; 281 unsigned int beacon_max_len; 282 bool rx_stream; 283 bool tx_stream; 284 bool rx_filter; 285 unsigned int mem_blocks; 286 unsigned int mem_block_size; 287 unsigned int rx_size; 288 unsigned int tx_seq_table; 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 atomic_t pending_restarts; 303 304 /* interface mode settings */ 305 struct list_head vif_list; 306 unsigned long vif_bitmap; 307 unsigned int vifs; 308 struct carl9170_vif vif_priv[AR9170_MAX_VIRTUAL_MAC]; 309 310 /* beaconing */ 311 spinlock_t beacon_lock; 312 unsigned int global_pretbtt; 313 unsigned int global_beacon_int; 314 struct carl9170_vif_info *beacon_iter; 315 unsigned int beacon_enabled; 316 317 /* cryptographic engine */ 318 u64 usedkeys; 319 bool rx_software_decryption; 320 bool disable_offload; 321 322 /* filter settings */ 323 u64 cur_mc_hash; 324 u32 cur_filter; 325 unsigned int filter_state; 326 unsigned int rx_filter_caps; 327 bool sniffer_enabled; 328 329 /* MAC */ 330 enum carl9170_erp_modes erp_mode; 331 332 /* PHY */ 333 struct ieee80211_channel *channel; 334 int noise[4]; 335 unsigned int chan_fail; 336 unsigned int total_chan_fail; 337 u8 heavy_clip; 338 u8 ht_settings; 339 340 /* power calibration data */ 341 u8 power_5G_leg[4]; 342 u8 power_2G_cck[4]; 343 u8 power_2G_ofdm[4]; 344 u8 power_5G_ht20[8]; 345 u8 power_5G_ht40[8]; 346 u8 power_2G_ht20[8]; 347 u8 power_2G_ht40[8]; 348 349 #ifdef CONFIG_CARL9170_LEDS 350 /* LED */ 351 struct delayed_work led_work; 352 struct carl9170_led leds[AR9170_NUM_LEDS]; 353 #endif /* CONFIG_CARL9170_LEDS */ 354 355 /* qos queue settings */ 356 spinlock_t tx_stats_lock; 357 struct carl9170_tx_queue_stats tx_stats[__AR9170_NUM_TXQ]; 358 struct ieee80211_tx_queue_params edcf[5]; 359 struct completion tx_flush; 360 361 /* CMD */ 362 int cmd_seq; 363 int readlen; 364 u8 *readbuf; 365 spinlock_t cmd_lock; 366 struct completion cmd_wait; 367 union { 368 __le32 cmd_buf[PAYLOAD_MAX + 1]; 369 struct carl9170_cmd cmd; 370 struct carl9170_rsp rsp; 371 }; 372 373 /* statistics */ 374 unsigned int tx_dropped; 375 unsigned int tx_ack_failures; 376 unsigned int tx_fcs_errors; 377 unsigned int rx_dropped; 378 379 /* EEPROM */ 380 struct ar9170_eeprom eeprom; 381 382 /* tx queuing */ 383 struct sk_buff_head tx_pending[__AR9170_NUM_TXQ]; 384 struct sk_buff_head tx_status[__AR9170_NUM_TXQ]; 385 struct delayed_work tx_janitor; 386 unsigned long tx_janitor_last_run; 387 bool tx_schedule; 388 389 /* tx ampdu */ 390 struct work_struct ampdu_work; 391 spinlock_t tx_ampdu_list_lock; 392 struct carl9170_sta_tid *tx_ampdu_iter; 393 struct list_head tx_ampdu_list; 394 atomic_t tx_ampdu_upload; 395 atomic_t tx_ampdu_scheduler; 396 atomic_t tx_total_pending; 397 atomic_t tx_total_queued; 398 unsigned int tx_ampdu_list_len; 399 int current_density; 400 int current_factor; 401 bool tx_ampdu_schedule; 402 403 /* internal memory management */ 404 spinlock_t mem_lock; 405 unsigned long *mem_bitmap; 406 atomic_t mem_free_blocks; 407 atomic_t mem_allocs; 408 409 /* rxstream mpdu merge */ 410 struct ar9170_rx_head rx_plcp; 411 bool rx_has_plcp; 412 struct sk_buff *rx_failover; 413 int rx_failover_missing; 414 415 #ifdef CONFIG_CARL9170_WPC 416 struct { 417 bool pbc_state; 418 struct input_dev *pbc; 419 char name[32]; 420 char phys[32]; 421 } wps; 422 #endif /* CONFIG_CARL9170_WPC */ 423 424 #ifdef CONFIG_CARL9170_DEBUGFS 425 struct carl9170_debug debug; 426 struct dentry *debug_dir; 427 #endif /* CONFIG_CARL9170_DEBUGFS */ 428 429 /* PSM */ 430 struct work_struct ps_work; 431 struct { 432 unsigned int dtim_counter; 433 unsigned long last_beacon; 434 unsigned long last_action; 435 unsigned long last_slept; 436 unsigned int sleep_ms; 437 unsigned int off_override; 438 bool state; 439 } ps; 440 }; 441 442 enum carl9170_ps_off_override_reasons { 443 PS_OFF_VIF = BIT(0), 444 PS_OFF_BCN = BIT(1), 445 }; 446 447 struct carl9170_ba_stats { 448 u8 ampdu_len; 449 u8 ampdu_ack_len; 450 bool clear; 451 bool req; 452 }; 453 454 struct carl9170_sta_info { 455 bool ht_sta; 456 bool sleeping; 457 atomic_t pending_frames; 458 unsigned int ampdu_max_len; 459 struct carl9170_sta_tid *agg[CARL9170_NUM_TID]; 460 struct carl9170_ba_stats stats[CARL9170_NUM_TID]; 461 }; 462 463 struct carl9170_tx_info { 464 unsigned long timeout; 465 struct ar9170 *ar; 466 struct kref ref; 467 }; 468 469 #define CHK_DEV_STATE(a, s) (((struct ar9170 *)a)->state >= (s)) 470 #define IS_INITIALIZED(a) (CHK_DEV_STATE(a, CARL9170_STOPPED)) 471 #define IS_ACCEPTING_CMD(a) (CHK_DEV_STATE(a, CARL9170_IDLE)) 472 #define IS_STARTED(a) (CHK_DEV_STATE(a, CARL9170_STARTED)) 473 474 static inline void __carl9170_set_state(struct ar9170 *ar, 475 enum carl9170_device_state newstate) 476 { 477 ar->state = newstate; 478 } 479 480 static inline void carl9170_set_state(struct ar9170 *ar, 481 enum carl9170_device_state newstate) 482 { 483 unsigned long flags; 484 485 spin_lock_irqsave(&ar->state_lock, flags); 486 __carl9170_set_state(ar, newstate); 487 spin_unlock_irqrestore(&ar->state_lock, flags); 488 } 489 490 static inline void carl9170_set_state_when(struct ar9170 *ar, 491 enum carl9170_device_state min, enum carl9170_device_state newstate) 492 { 493 unsigned long flags; 494 495 spin_lock_irqsave(&ar->state_lock, flags); 496 if (CHK_DEV_STATE(ar, min)) 497 __carl9170_set_state(ar, newstate); 498 spin_unlock_irqrestore(&ar->state_lock, flags); 499 } 500 501 /* exported interface */ 502 void *carl9170_alloc(size_t priv_size); 503 int carl9170_register(struct ar9170 *ar); 504 void carl9170_unregister(struct ar9170 *ar); 505 void carl9170_free(struct ar9170 *ar); 506 void carl9170_restart(struct ar9170 *ar, const enum carl9170_restart_reasons r); 507 void carl9170_ps_check(struct ar9170 *ar); 508 509 /* USB back-end */ 510 int carl9170_usb_open(struct ar9170 *ar); 511 void carl9170_usb_stop(struct ar9170 *ar); 512 void carl9170_usb_tx(struct ar9170 *ar, struct sk_buff *skb); 513 void carl9170_usb_handle_tx_err(struct ar9170 *ar); 514 int carl9170_exec_cmd(struct ar9170 *ar, const enum carl9170_cmd_oids, 515 u32 plen, void *payload, u32 rlen, void *resp); 516 int __carl9170_exec_cmd(struct ar9170 *ar, struct carl9170_cmd *cmd, 517 const bool free_buf); 518 int carl9170_usb_restart(struct ar9170 *ar); 519 void carl9170_usb_reset(struct ar9170 *ar); 520 521 /* MAC */ 522 int carl9170_init_mac(struct ar9170 *ar); 523 int carl9170_set_qos(struct ar9170 *ar); 524 int carl9170_update_multicast(struct ar9170 *ar, const u64 mc_hast); 525 int carl9170_mod_virtual_mac(struct ar9170 *ar, const unsigned int id, 526 const u8 *mac); 527 int carl9170_set_operating_mode(struct ar9170 *ar); 528 int carl9170_set_beacon_timers(struct ar9170 *ar); 529 int carl9170_set_dyn_sifs_ack(struct ar9170 *ar); 530 int carl9170_set_rts_cts_rate(struct ar9170 *ar); 531 int carl9170_set_ampdu_settings(struct ar9170 *ar); 532 int carl9170_set_slot_time(struct ar9170 *ar); 533 int carl9170_set_mac_rates(struct ar9170 *ar); 534 int carl9170_set_hwretry_limit(struct ar9170 *ar, const u32 max_retry); 535 int carl9170_update_beacon(struct ar9170 *ar, const bool submit); 536 int carl9170_upload_key(struct ar9170 *ar, const u8 id, const u8 *mac, 537 const u8 ktype, const u8 keyidx, const u8 *keydata, const int keylen); 538 int carl9170_disable_key(struct ar9170 *ar, const u8 id); 539 540 /* RX */ 541 void carl9170_rx(struct ar9170 *ar, void *buf, unsigned int len); 542 void carl9170_handle_command_response(struct ar9170 *ar, void *buf, u32 len); 543 544 /* TX */ 545 void carl9170_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb); 546 void carl9170_tx_janitor(struct work_struct *work); 547 void carl9170_tx_process_status(struct ar9170 *ar, 548 const struct carl9170_rsp *cmd); 549 void carl9170_tx_status(struct ar9170 *ar, struct sk_buff *skb, 550 const bool success); 551 void carl9170_tx_callback(struct ar9170 *ar, struct sk_buff *skb); 552 void carl9170_tx_drop(struct ar9170 *ar, struct sk_buff *skb); 553 void carl9170_tx_scheduler(struct ar9170 *ar); 554 void carl9170_tx_get_skb(struct sk_buff *skb); 555 int carl9170_tx_put_skb(struct sk_buff *skb); 556 557 /* LEDs */ 558 #ifdef CONFIG_CARL9170_LEDS 559 int carl9170_led_register(struct ar9170 *ar); 560 void carl9170_led_unregister(struct ar9170 *ar); 561 #endif /* CONFIG_CARL9170_LEDS */ 562 int carl9170_led_init(struct ar9170 *ar); 563 int carl9170_led_set_state(struct ar9170 *ar, const u32 led_state); 564 565 /* PHY / RF */ 566 int carl9170_set_channel(struct ar9170 *ar, struct ieee80211_channel *channel, 567 enum nl80211_channel_type bw, enum carl9170_rf_init_mode rfi); 568 int carl9170_get_noisefloor(struct ar9170 *ar); 569 570 /* FW */ 571 int carl9170_parse_firmware(struct ar9170 *ar); 572 int carl9170_fw_fix_eeprom(struct ar9170 *ar); 573 574 extern struct ieee80211_rate __carl9170_ratetable[]; 575 extern int modparam_noht; 576 577 static inline struct ar9170 *carl9170_get_priv(struct carl9170_vif *carl_vif) 578 { 579 return container_of(carl_vif, struct ar9170, 580 vif_priv[carl_vif->id]); 581 } 582 583 static inline struct ieee80211_hdr *carl9170_get_hdr(struct sk_buff *skb) 584 { 585 return (void *)((struct _carl9170_tx_superframe *) 586 skb->data)->frame_data; 587 } 588 589 static inline u16 get_seq_h(struct ieee80211_hdr *hdr) 590 { 591 return le16_to_cpu(hdr->seq_ctrl) >> 4; 592 } 593 594 static inline u16 carl9170_get_seq(struct sk_buff *skb) 595 { 596 return get_seq_h(carl9170_get_hdr(skb)); 597 } 598 599 static inline u16 get_tid_h(struct ieee80211_hdr *hdr) 600 { 601 return (ieee80211_get_qos_ctl(hdr))[0] & IEEE80211_QOS_CTL_TID_MASK; 602 } 603 604 static inline u16 carl9170_get_tid(struct sk_buff *skb) 605 { 606 return get_tid_h(carl9170_get_hdr(skb)); 607 } 608 609 static inline struct ieee80211_vif * 610 carl9170_get_vif(struct carl9170_vif_info *priv) 611 { 612 return container_of((void *)priv, struct ieee80211_vif, drv_priv); 613 } 614 615 /* Protected by ar->mutex or RCU */ 616 static inline struct ieee80211_vif *carl9170_get_main_vif(struct ar9170 *ar) 617 { 618 struct carl9170_vif_info *cvif; 619 620 list_for_each_entry_rcu(cvif, &ar->vif_list, list) { 621 if (cvif->active) 622 return carl9170_get_vif(cvif); 623 } 624 625 return NULL; 626 } 627 628 static inline bool is_main_vif(struct ar9170 *ar, struct ieee80211_vif *vif) 629 { 630 bool ret; 631 632 rcu_read_lock(); 633 ret = (carl9170_get_main_vif(ar) == vif); 634 rcu_read_unlock(); 635 return ret; 636 } 637 638 #endif /* __CARL9170_H */ 639