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 */ 630