kernel/drivers/net/wireless/ath/ath9k/main.c

   1 /*
   2  * Copyright (c) 2008-2011 Atheros Communications Inc.
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include <linux/nl80211.h>
  18 #include <linux/delay.h>
  19 #include "ath9k.h"
  20 #include "btcoex.h"
  21
  22 u8 ath9k_parse_mpdudensity(u8 mpdudensity)
  23 {
  24         /*
  25          * 802.11n D2.0 defined values for "Minimum MPDU Start Spacing":
  26          *   0 for no restriction
  27          *   1 for 1/4 us
  28          *   2 for 1/2 us
  29          *   3 for 1 us
  30          *   4 for 2 us
  31          *   5 for 4 us
  32          *   6 for 8 us
  33          *   7 for 16 us
  34          */
  35         switch (mpdudensity) {
  36         case 0:
  37                 return 0;
  38         case 1:
  39         case 2:
  40         case 3:
  41                 /* Our lower layer calculations limit our precision to
  42                    1 microsecond */
  43                 return 1;
  44         case 4:
  45                 return 2;
  46         case 5:
  47                 return 4;
  48         case 6:
  49                 return 8;
  50         case 7:
  51                 return 16;
  52         default:
  53                 return 0;
  54         }
  55 }
  56
  57 static bool ath9k_has_pending_frames(struct ath_softc *sc, struct ath_txq *txq,
  58                                      bool sw_pending)
  59 {
  60         bool pending = false;
  61
  62         spin_lock_bh(&txq->axq_lock);
  63
  64         if (txq->axq_depth) {
  65                 pending = true;
  66                 goto out;
  67         }
  68
  69         if (!sw_pending)
  70                 goto out;
  71
  72         if (txq->mac80211_qnum >= 0) {
  73                 struct list_head *list;
  74
  75                 list = &sc->cur_chan->acq[txq->mac80211_qnum];
  76                 if (!list_empty(list))
  77                         pending = true;
  78         }
  79 out:
  80         spin_unlock_bh(&txq->axq_lock);
  81         return pending;
  82 }
  83
  84 static bool ath9k_setpower(struct ath_softc *sc, enum ath9k_power_mode mode)
  85 {
  86         unsigned long flags;
  87         bool ret;
  88
  89         spin_lock_irqsave(&sc->sc_pm_lock, flags);
  90         ret = ath9k_hw_setpower(sc->sc_ah, mode);
  91         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
  92
  93         return ret;
  94 }
  95
  96 void ath_ps_full_sleep(unsigned long data)
  97 {
  98         struct ath_softc *sc = (struct ath_softc *) data;
  99         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 100         bool reset;
 101
 102         spin_lock(&common->cc_lock);
 103         ath_hw_cycle_counters_update(common);
 104         spin_unlock(&common->cc_lock);
 105
 106         ath9k_hw_setrxabort(sc->sc_ah, 1);
 107         ath9k_hw_stopdmarecv(sc->sc_ah, &reset);
 108
 109         ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_FULL_SLEEP);
 110 }
 111
 112 void ath9k_ps_wakeup(struct ath_softc *sc)
 113 {
 114         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 115         unsigned long flags;
 116         enum ath9k_power_mode power_mode;
 117
 118         spin_lock_irqsave(&sc->sc_pm_lock, flags);
 119         if (++sc->ps_usecount != 1)
 120                 goto unlock;
 121
 122         del_timer_sync(&sc->sleep_timer);
 123         power_mode = sc->sc_ah->power_mode;
 124         ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
 125
 126         /*
 127          * While the hardware is asleep, the cycle counters contain no
 128          * useful data. Better clear them now so that they don't mess up
 129          * survey data results.
 130          */
 131         if (power_mode != ATH9K_PM_AWAKE) {
 132                 spin_lock(&common->cc_lock);
 133                 ath_hw_cycle_counters_update(common);
 134                 memset(&common->cc_survey, 0, sizeof(common->cc_survey));
 135                 memset(&common->cc_ani, 0, sizeof(common->cc_ani));
 136                 spin_unlock(&common->cc_lock);
 137         }
 138
 139  unlock:
 140         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 141 }
 142
 143 void ath9k_ps_restore(struct ath_softc *sc)
 144 {
 145         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 146         enum ath9k_power_mode mode;
 147         unsigned long flags;
 148
 149         spin_lock_irqsave(&sc->sc_pm_lock, flags);
 150         if (--sc->ps_usecount != 0)
 151                 goto unlock;
 152
 153         if (sc->ps_idle) {
 154                 mod_timer(&sc->sleep_timer, jiffies + HZ / 10);
 155                 goto unlock;
 156         }
 157
 158         if (sc->ps_enabled &&
 159                    !(sc->ps_flags & (PS_WAIT_FOR_BEACON |
 160                                      PS_WAIT_FOR_CAB |
 161                                      PS_WAIT_FOR_PSPOLL_DATA |
 162                                      PS_WAIT_FOR_TX_ACK |
 163                                      PS_WAIT_FOR_ANI))) {
 164                 mode = ATH9K_PM_NETWORK_SLEEP;
 165                 if (ath9k_hw_btcoex_is_enabled(sc->sc_ah))
 166                         ath9k_btcoex_stop_gen_timer(sc);
 167         } else {
 168                 goto unlock;
 169         }
 170
 171         spin_lock(&common->cc_lock);
 172         ath_hw_cycle_counters_update(common);
 173         spin_unlock(&common->cc_lock);
 174
 175         ath9k_hw_setpower(sc->sc_ah, mode);
 176
 177  unlock:
 178         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 179 }
 180
 181 static void __ath_cancel_work(struct ath_softc *sc)
 182 {
 183         cancel_work_sync(&sc->paprd_work);
 184         cancel_delayed_work_sync(&sc->tx_complete_work);
 185         cancel_delayed_work_sync(&sc->hw_pll_work);
 186
 187 #ifdef CONFIG_ATH9K_BTCOEX_SUPPORT
 188         if (ath9k_hw_mci_is_enabled(sc->sc_ah))
 189                 cancel_work_sync(&sc->mci_work);
 190 #endif
 191 }
 192
 193 void ath_cancel_work(struct ath_softc *sc)
 194 {
 195         __ath_cancel_work(sc);
 196         cancel_work_sync(&sc->hw_reset_work);
 197 }
 198
 199 void ath_restart_work(struct ath_softc *sc)
 200 {
 201         ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
 202
 203         if (AR_SREV_9340(sc->sc_ah) || AR_SREV_9330(sc->sc_ah))
 204                 ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work,
 205                                      msecs_to_jiffies(ATH_PLL_WORK_INTERVAL));
 206
 207         ath_start_ani(sc);
 208 }
 209
 210 static bool ath_prepare_reset(struct ath_softc *sc)
 211 {
 212         struct ath_hw *ah = sc->sc_ah;
 213         bool ret = true;
 214
 215         ieee80211_stop_queues(sc->hw);
 216         ath_stop_ani(sc);
 217         ath9k_hw_disable_interrupts(ah);
 218
 219         if (AR_SREV_9300_20_OR_LATER(ah)) {
 220                 ret &= ath_stoprecv(sc);
 221                 ret &= ath_drain_all_txq(sc);
 222         } else {
 223                 ret &= ath_drain_all_txq(sc);
 224                 ret &= ath_stoprecv(sc);
 225         }
 226
 227         return ret;
 228 }
 229
 230 static bool ath_complete_reset(struct ath_softc *sc, bool start)
 231 {
 232         struct ath_hw *ah = sc->sc_ah;
 233         struct ath_common *common = ath9k_hw_common(ah);
 234         unsigned long flags;
 235
 236         ath9k_calculate_summary_state(sc, sc->cur_chan);
 237         ath_startrecv(sc);
 238         ath9k_cmn_update_txpow(ah, sc->cur_chan->cur_txpower,
 239                                sc->cur_chan->txpower,
 240                                &sc->cur_chan->cur_txpower);
 241         clear_bit(ATH_OP_HW_RESET, &common->op_flags);
 242
 243         if (!sc->cur_chan->offchannel && start) {
 244                 /* restore per chanctx TSF timer */
 245                 if (sc->cur_chan->tsf_val) {
 246                         u32 offset;
 247
 248                         offset = ath9k_hw_get_tsf_offset(&sc->cur_chan->tsf_ts,
 249                                                          NULL);
 250                         ath9k_hw_settsf64(ah, sc->cur_chan->tsf_val + offset);
 251                 }
 252
 253
 254                 if (!test_bit(ATH_OP_BEACONS, &common->op_flags))
 255                         goto work;
 256
 257                 if (ah->opmode == NL80211_IFTYPE_STATION &&
 258                     test_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags)) {
 259                         spin_lock_irqsave(&sc->sc_pm_lock, flags);
 260                         sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
 261                         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 262                 } else {
 263                         ath9k_set_beacon(sc);
 264                 }
 265         work:
 266                 ath_restart_work(sc);
 267                 ath_txq_schedule_all(sc);
 268         }
 269
 270         sc->gtt_cnt = 0;
 271
 272         ath9k_hw_set_interrupts(ah);
 273         ath9k_hw_enable_interrupts(ah);
 274         ieee80211_wake_queues(sc->hw);
 275         ath9k_p2p_ps_timer(sc);
 276
 277         return true;
 278 }
 279
 280 static int ath_reset_internal(struct ath_softc *sc, struct ath9k_channel *hchan)
 281 {
 282         struct ath_hw *ah = sc->sc_ah;
 283         struct ath_common *common = ath9k_hw_common(ah);
 284         struct ath9k_hw_cal_data *caldata = NULL;
 285         bool fastcc = true;
 286         int r;
 287
 288         __ath_cancel_work(sc);
 289
 290         disable_irq(sc->irq);
 291         tasklet_disable(&sc->intr_tq);
 292         tasklet_disable(&sc->bcon_tasklet);
 293         spin_lock_bh(&sc->sc_pcu_lock);
 294
 295         if (!sc->cur_chan->offchannel) {
 296                 fastcc = false;
 297                 caldata = &sc->cur_chan->caldata;
 298         }
 299
 300         if (!hchan) {
 301                 fastcc = false;
 302                 hchan = ah->curchan;
 303         }
 304
 305         if (!ath_prepare_reset(sc))
 306                 fastcc = false;
 307
 308         if (ath9k_is_chanctx_enabled())
 309                 fastcc = false;
 310
 311         spin_lock_bh(&sc->chan_lock);
 312         sc->cur_chandef = sc->cur_chan->chandef;
 313         spin_unlock_bh(&sc->chan_lock);
 314
 315         ath_dbg(common, CONFIG, "Reset to %u MHz, HT40: %d fastcc: %d\n",
 316                 hchan->channel, IS_CHAN_HT40(hchan), fastcc);
 317
 318         r = ath9k_hw_reset(ah, hchan, caldata, fastcc);
 319         if (r) {
 320                 ath_err(common,
 321                         "Unable to reset channel, reset status %d\n", r);
 322
 323                 ath9k_hw_enable_interrupts(ah);
 324                 ath9k_queue_reset(sc, RESET_TYPE_BB_HANG);
 325
 326                 goto out;
 327         }
 328
 329         if (ath9k_hw_mci_is_enabled(sc->sc_ah) &&
 330             sc->cur_chan->offchannel)
 331                 ath9k_mci_set_txpower(sc, true, false);
 332
 333         if (!ath_complete_reset(sc, true))
 334                 r = -EIO;
 335
 336 out:
 337         enable_irq(sc->irq);
 338         spin_unlock_bh(&sc->sc_pcu_lock);
 339         tasklet_enable(&sc->bcon_tasklet);
 340         tasklet_enable(&sc->intr_tq);
 341
 342         return r;
 343 }
 344
 345 static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta,
 346                             struct ieee80211_vif *vif)
 347 {
 348         struct ath_node *an;
 349         an = (struct ath_node *)sta->drv_priv;
 350
 351         an->sc = sc;
 352         an->sta = sta;
 353         an->vif = vif;
 354         memset(&an->key_idx, 0, sizeof(an->key_idx));
 355
 356         ath_tx_node_init(sc, an);
 357
 358         ath_dynack_node_init(sc->sc_ah, an);
 359 }
 360
 361 static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
 362 {
 363         struct ath_node *an = (struct ath_node *)sta->drv_priv;
 364         ath_tx_node_cleanup(sc, an);
 365
 366         ath_dynack_node_deinit(sc->sc_ah, an);
 367 }
 368
 369 void ath9k_tasklet(unsigned long data)
 370 {
 371         struct ath_softc *sc = (struct ath_softc *)data;
 372         struct ath_hw *ah = sc->sc_ah;
 373         struct ath_common *common = ath9k_hw_common(ah);
 374         enum ath_reset_type type;
 375         unsigned long flags;
 376         u32 status = sc->intrstatus;
 377         u32 rxmask;
 378
 379         ath9k_ps_wakeup(sc);
 380         spin_lock(&sc->sc_pcu_lock);
 381
 382         if (status & ATH9K_INT_FATAL) {
 383                 type = RESET_TYPE_FATAL_INT;
 384                 ath9k_queue_reset(sc, type);
 385
 386                 /*
 387                  * Increment the ref. counter here so that
 388                  * interrupts are enabled in the reset routine.
 389                  */
 390                 atomic_inc(&ah->intr_ref_cnt);
 391                 ath_dbg(common, RESET, "FATAL: Skipping interrupts\n");
 392                 goto out;
 393         }
 394
 395         if ((ah->config.hw_hang_checks & HW_BB_WATCHDOG) &&
 396             (status & ATH9K_INT_BB_WATCHDOG)) {
 397                 spin_lock(&common->cc_lock);
 398                 ath_hw_cycle_counters_update(common);
 399                 ar9003_hw_bb_watchdog_dbg_info(ah);
 400                 spin_unlock(&common->cc_lock);
 401
 402                 if (ar9003_hw_bb_watchdog_check(ah)) {
 403                         type = RESET_TYPE_BB_WATCHDOG;
 404                         ath9k_queue_reset(sc, type);
 405
 406                         /*
 407                          * Increment the ref. counter here so that
 408                          * interrupts are enabled in the reset routine.
 409                          */
 410                         atomic_inc(&ah->intr_ref_cnt);
 411                         ath_dbg(common, RESET,
 412                                 "BB_WATCHDOG: Skipping interrupts\n");
 413                         goto out;
 414                 }
 415         }
 416
 417         if (status & ATH9K_INT_GTT) {
 418                 sc->gtt_cnt++;
 419
 420                 if ((sc->gtt_cnt >= MAX_GTT_CNT) && !ath9k_hw_check_alive(ah)) {
 421                         type = RESET_TYPE_TX_GTT;
 422                         ath9k_queue_reset(sc, type);
 423                         atomic_inc(&ah->intr_ref_cnt);
 424                         ath_dbg(common, RESET,
 425                                 "GTT: Skipping interrupts\n");
 426                         goto out;
 427                 }
 428         }
 429
 430         spin_lock_irqsave(&sc->sc_pm_lock, flags);
 431         if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) {
 432                 /*
 433                  * TSF sync does not look correct; remain awake to sync with
 434                  * the next Beacon.
 435                  */
 436                 ath_dbg(common, PS, "TSFOOR - Sync with next Beacon\n");
 437                 sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC;
 438         }
 439         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 440
 441         if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
 442                 rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL |
 443                           ATH9K_INT_RXORN);
 444         else
 445                 rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
 446
 447         if (status & rxmask) {
 448                 /* Check for high priority Rx first */
 449                 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
 450                     (status & ATH9K_INT_RXHP))
 451                         ath_rx_tasklet(sc, 0, true);
 452
 453                 ath_rx_tasklet(sc, 0, false);
 454         }
 455
 456         if (status & ATH9K_INT_TX) {
 457                 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
 458                         /*
 459                          * For EDMA chips, TX completion is enabled for the
 460                          * beacon queue, so if a beacon has been transmitted
 461                          * successfully after a GTT interrupt, the GTT counter
 462                          * gets reset to zero here.
 463                          */
 464                         sc->gtt_cnt = 0;
 465
 466                         ath_tx_edma_tasklet(sc);
 467                 } else {
 468                         ath_tx_tasklet(sc);
 469                 }
 470
 471                 wake_up(&sc->tx_wait);
 472         }
 473
 474         if (status & ATH9K_INT_GENTIMER)
 475                 ath_gen_timer_isr(sc->sc_ah);
 476
 477         ath9k_btcoex_handle_interrupt(sc, status);
 478
 479         /* re-enable hardware interrupt */
 480         ath9k_hw_enable_interrupts(ah);
 481 out:
 482         spin_unlock(&sc->sc_pcu_lock);
 483         ath9k_ps_restore(sc);
 484 }
 485
 486 irqreturn_t ath_isr(int irq, void *dev)
 487 {
 488 #define SCHED_INTR (                            \
 489                 ATH9K_INT_FATAL |               \
 490                 ATH9K_INT_BB_WATCHDOG |         \
 491                 ATH9K_INT_RXORN |               \
 492                 ATH9K_INT_RXEOL |               \
 493                 ATH9K_INT_RX |                  \
 494                 ATH9K_INT_RXLP |                \
 495                 ATH9K_INT_RXHP |                \
 496                 ATH9K_INT_TX |                  \
 497                 ATH9K_INT_BMISS |               \
 498                 ATH9K_INT_CST |                 \
 499                 ATH9K_INT_GTT |                 \
 500                 ATH9K_INT_TSFOOR |              \
 501                 ATH9K_INT_GENTIMER |            \
 502                 ATH9K_INT_MCI)
 503
 504         struct ath_softc *sc = dev;
 505         struct ath_hw *ah = sc->sc_ah;
 506         struct ath_common *common = ath9k_hw_common(ah);
 507         enum ath9k_int status;
 508         u32 sync_cause = 0;
 509         bool sched = false;
 510
 511         /*
 512          * The hardware is not ready/present, don't
 513          * touch anything. Note this can happen early
 514          * on if the IRQ is shared.
 515          */
 516         if (!ah || test_bit(ATH_OP_INVALID, &common->op_flags))
 517                 return IRQ_NONE;
 518
 519         /* shared irq, not for us */
 520         if (!ath9k_hw_intrpend(ah))
 521                 return IRQ_NONE;
 522
 523         /*
 524          * Figure out the reason(s) for the interrupt.  Note
 525          * that the hal returns a pseudo-ISR that may include
 526          * bits we haven't explicitly enabled so we mask the
 527          * value to insure we only process bits we requested.
 528          */
 529         ath9k_hw_getisr(ah, &status, &sync_cause); /* NB: clears ISR too */
 530         ath9k_debug_sync_cause(sc, sync_cause);
 531         status &= ah->imask;    /* discard unasked-for bits */
 532
 533         if (test_bit(ATH_OP_HW_RESET, &common->op_flags))
 534                 return IRQ_HANDLED;
 535
 536         /*
 537          * If there are no status bits set, then this interrupt was not
 538          * for me (should have been caught above).
 539          */
 540         if (!status)
 541                 return IRQ_NONE;
 542
 543         /* Cache the status */
 544         sc->intrstatus = status;
 545
 546         if (status & SCHED_INTR)
 547                 sched = true;
 548
 549         /*
 550          * If a FATAL interrupt is received, we have to reset the chip
 551          * immediately.
 552          */
 553         if (status & ATH9K_INT_FATAL)
 554                 goto chip_reset;
 555
 556         if ((ah->config.hw_hang_checks & HW_BB_WATCHDOG) &&
 557             (status & ATH9K_INT_BB_WATCHDOG))
 558                 goto chip_reset;
 559
 560         if (status & ATH9K_INT_SWBA)
 561                 tasklet_schedule(&sc->bcon_tasklet);
 562
 563         if (status & ATH9K_INT_TXURN)
 564                 ath9k_hw_updatetxtriglevel(ah, true);
 565
 566         if (status & ATH9K_INT_RXEOL) {
 567                 ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
 568                 ath9k_hw_set_interrupts(ah);
 569         }
 570
 571         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
 572                 if (status & ATH9K_INT_TIM_TIMER) {
 573                         if (ATH_DBG_WARN_ON_ONCE(sc->ps_idle))
 574                                 goto chip_reset;
 575                         /* Clear RxAbort bit so that we can
 576                          * receive frames */
 577                         ath9k_setpower(sc, ATH9K_PM_AWAKE);
 578                         spin_lock(&sc->sc_pm_lock);
 579                         ath9k_hw_setrxabort(sc->sc_ah, 0);
 580                         sc->ps_flags |= PS_WAIT_FOR_BEACON;
 581                         spin_unlock(&sc->sc_pm_lock);
 582                 }
 583
 584 chip_reset:
 585
 586         ath_debug_stat_interrupt(sc, status);
 587
 588         if (sched) {
 589                 /* turn off every interrupt */
 590                 ath9k_hw_disable_interrupts(ah);
 591                 tasklet_schedule(&sc->intr_tq);
 592         }
 593
 594         return IRQ_HANDLED;
 595
 596 #undef SCHED_INTR
 597 }
 598
 599 /*
 600  * This function is called when a HW reset cannot be deferred
 601  * and has to be immediate.
 602  */
 603 int ath_reset(struct ath_softc *sc, struct ath9k_channel *hchan)
 604 {
 605         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 606         int r;
 607
 608         ath9k_hw_kill_interrupts(sc->sc_ah);
 609         set_bit(ATH_OP_HW_RESET, &common->op_flags);
 610
 611         ath9k_ps_wakeup(sc);
 612         r = ath_reset_internal(sc, hchan);
 613         ath9k_ps_restore(sc);
 614
 615         return r;
 616 }
 617
 618 /*
 619  * When a HW reset can be deferred, it is added to the
 620  * hw_reset_work workqueue, but we set ATH_OP_HW_RESET before
 621  * queueing.
 622  */
 623 void ath9k_queue_reset(struct ath_softc *sc, enum ath_reset_type type)
 624 {
 625         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 626 #ifdef CONFIG_ATH9K_DEBUGFS
 627         RESET_STAT_INC(sc, type);
 628 #endif
 629         ath9k_hw_kill_interrupts(sc->sc_ah);
 630         set_bit(ATH_OP_HW_RESET, &common->op_flags);
 631         ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
 632 }
 633
 634 void ath_reset_work(struct work_struct *work)
 635 {
 636         struct ath_softc *sc = container_of(work, struct ath_softc, hw_reset_work);
 637
 638         ath9k_ps_wakeup(sc);
 639         ath_reset_internal(sc, NULL);
 640         ath9k_ps_restore(sc);
 641 }
 642
 643 /**********************/
 644 /* mac80211 callbacks */
 645 /**********************/
 646
 647 static int ath9k_start(struct ieee80211_hw *hw)
 648 {
 649         struct ath_softc *sc = hw->priv;
 650         struct ath_hw *ah = sc->sc_ah;
 651         struct ath_common *common = ath9k_hw_common(ah);
 652         struct ieee80211_channel *curchan = sc->cur_chan->chandef.chan;
 653         struct ath_chanctx *ctx = sc->cur_chan;
 654         struct ath9k_channel *init_channel;
 655         int r;
 656
 657         ath_dbg(common, CONFIG,
 658                 "Starting driver with initial channel: %d MHz\n",
 659                 curchan->center_freq);
 660
 661         ath9k_ps_wakeup(sc);
 662         mutex_lock(&sc->mutex);
 663
 664         init_channel = ath9k_cmn_get_channel(hw, ah, &ctx->chandef);
 665         sc->cur_chandef = hw->conf.chandef;
 666
 667         /* Reset SERDES registers */
 668         ath9k_hw_configpcipowersave(ah, false);
 669
 670         /*
 671          * The basic interface to setting the hardware in a good
 672          * state is ``reset''.  On return the hardware is known to
 673          * be powered up and with interrupts disabled.  This must
 674          * be followed by initialization of the appropriate bits
 675          * and then setup of the interrupt mask.
 676          */
 677         spin_lock_bh(&sc->sc_pcu_lock);
 678
 679         atomic_set(&ah->intr_ref_cnt, -1);
 680
 681         r = ath9k_hw_reset(ah, init_channel, ah->caldata, false);
 682         if (r) {
 683                 ath_err(common,
 684                         "Unable to reset hardware; reset status %d (freq %u MHz)\n",
 685                         r, curchan->center_freq);
 686                 ah->reset_power_on = false;
 687         }
 688
 689         /* Setup our intr mask. */
 690         ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL |
 691                     ATH9K_INT_RXORN | ATH9K_INT_FATAL |
 692                     ATH9K_INT_GLOBAL;
 693
 694         if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
 695                 ah->imask |= ATH9K_INT_RXHP |
 696                              ATH9K_INT_RXLP;
 697         else
 698                 ah->imask |= ATH9K_INT_RX;
 699
 700         if (ah->config.hw_hang_checks & HW_BB_WATCHDOG)
 701                 ah->imask |= ATH9K_INT_BB_WATCHDOG;
 702
 703         /*
 704          * Enable GTT interrupts only for AR9003/AR9004 chips
 705          * for now.
 706          */
 707         if (AR_SREV_9300_20_OR_LATER(ah))
 708                 ah->imask |= ATH9K_INT_GTT;
 709
 710         if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
 711                 ah->imask |= ATH9K_INT_CST;
 712
 713         ath_mci_enable(sc);
 714
 715         clear_bit(ATH_OP_INVALID, &common->op_flags);
 716         sc->sc_ah->is_monitoring = false;
 717
 718         if (!ath_complete_reset(sc, false))
 719                 ah->reset_power_on = false;
 720
 721         if (ah->led_pin >= 0) {
 722                 ath9k_hw_cfg_output(ah, ah->led_pin,
 723                                     AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
 724                 ath9k_hw_set_gpio(ah, ah->led_pin,
 725                                   (ah->config.led_active_high) ? 1 : 0);
 726         }
 727
 728         /*
 729          * Reset key cache to sane defaults (all entries cleared) instead of
 730          * semi-random values after suspend/resume.
 731          */
 732         ath9k_cmn_init_crypto(sc->sc_ah);
 733
 734         ath9k_hw_reset_tsf(ah);
 735
 736         spin_unlock_bh(&sc->sc_pcu_lock);
 737
 738         mutex_unlock(&sc->mutex);
 739
 740         ath9k_ps_restore(sc);
 741
 742         return 0;
 743 }
 744
 745 static void ath9k_tx(struct ieee80211_hw *hw,
 746                      struct ieee80211_tx_control *control,
 747                      struct sk_buff *skb)
 748 {
 749         struct ath_softc *sc = hw->priv;
 750         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 751         struct ath_tx_control txctl;
 752         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 753         unsigned long flags;
 754
 755         if (sc->ps_enabled) {
 756                 /*
 757                  * mac80211 does not set PM field for normal data frames, so we
 758                  * need to update that based on the current PS mode.
 759                  */
 760                 if (ieee80211_is_data(hdr->frame_control) &&
 761                     !ieee80211_is_nullfunc(hdr->frame_control) &&
 762                     !ieee80211_has_pm(hdr->frame_control)) {
 763                         ath_dbg(common, PS,
 764                                 "Add PM=1 for a TX frame while in PS mode\n");
 765                         hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 766                 }
 767         }
 768
 769         if (unlikely(sc->sc_ah->power_mode == ATH9K_PM_NETWORK_SLEEP)) {
 770                 /*
 771                  * We are using PS-Poll and mac80211 can request TX while in
 772                  * power save mode. Need to wake up hardware for the TX to be
 773                  * completed and if needed, also for RX of buffered frames.
 774                  */
 775                 ath9k_ps_wakeup(sc);
 776                 spin_lock_irqsave(&sc->sc_pm_lock, flags);
 777                 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
 778                         ath9k_hw_setrxabort(sc->sc_ah, 0);
 779                 if (ieee80211_is_pspoll(hdr->frame_control)) {
 780                         ath_dbg(common, PS,
 781                                 "Sending PS-Poll to pick a buffered frame\n");
 782                         sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA;
 783                 } else {
 784                         ath_dbg(common, PS, "Wake up to complete TX\n");
 785                         sc->ps_flags |= PS_WAIT_FOR_TX_ACK;
 786                 }
 787                 /*
 788                  * The actual restore operation will happen only after
 789                  * the ps_flags bit is cleared. We are just dropping
 790                  * the ps_usecount here.
 791                  */
 792                 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 793                 ath9k_ps_restore(sc);
 794         }
 795
 796         /*
 797          * Cannot tx while the hardware is in full sleep, it first needs a full
 798          * chip reset to recover from that
 799          */
 800         if (unlikely(sc->sc_ah->power_mode == ATH9K_PM_FULL_SLEEP)) {
 801                 ath_err(common, "TX while HW is in FULL_SLEEP mode\n");
 802                 goto exit;
 803         }
 804
 805         memset(&txctl, 0, sizeof(struct ath_tx_control));
 806         txctl.txq = sc->tx.txq_map[skb_get_queue_mapping(skb)];
 807         txctl.sta = control->sta;
 808
 809         ath_dbg(common, XMIT, "transmitting packet, skb: %p\n", skb);
 810
 811         if (ath_tx_start(hw, skb, &txctl) != 0) {
 812                 ath_dbg(common, XMIT, "TX failed\n");
 813                 TX_STAT_INC(txctl.txq->axq_qnum, txfailed);
 814                 goto exit;
 815         }
 816
 817         return;
 818 exit:
 819         ieee80211_free_txskb(hw, skb);
 820 }
 821
 822 static void ath9k_stop(struct ieee80211_hw *hw)
 823 {
 824         struct ath_softc *sc = hw->priv;
 825         struct ath_hw *ah = sc->sc_ah;
 826         struct ath_common *common = ath9k_hw_common(ah);
 827         bool prev_idle;
 828
 829         ath9k_deinit_channel_context(sc);
 830
 831         mutex_lock(&sc->mutex);
 832
 833         ath_cancel_work(sc);
 834
 835         if (test_bit(ATH_OP_INVALID, &common->op_flags)) {
 836                 ath_dbg(common, ANY, "Device not present\n");
 837                 mutex_unlock(&sc->mutex);
 838                 return;
 839         }
 840
 841         /* Ensure HW is awake when we try to shut it down. */
 842         ath9k_ps_wakeup(sc);
 843
 844         spin_lock_bh(&sc->sc_pcu_lock);
 845
 846         /* prevent tasklets to enable interrupts once we disable them */
 847         ah->imask &= ~ATH9K_INT_GLOBAL;
 848
 849         /* make sure h/w will not generate any interrupt
 850          * before setting the invalid flag. */
 851         ath9k_hw_disable_interrupts(ah);
 852
 853         spin_unlock_bh(&sc->sc_pcu_lock);
 854
 855         /* we can now sync irq and kill any running tasklets, since we already
 856          * disabled interrupts and not holding a spin lock */
 857         synchronize_irq(sc->irq);
 858         tasklet_kill(&sc->intr_tq);
 859         tasklet_kill(&sc->bcon_tasklet);
 860
 861         prev_idle = sc->ps_idle;
 862         sc->ps_idle = true;
 863
 864         spin_lock_bh(&sc->sc_pcu_lock);
 865
 866         if (ah->led_pin >= 0) {
 867                 ath9k_hw_set_gpio(ah, ah->led_pin,
 868                                   (ah->config.led_active_high) ? 0 : 1);
 869                 ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
 870         }
 871
 872         ath_prepare_reset(sc);
 873
 874         if (sc->rx.frag) {
 875                 dev_kfree_skb_any(sc->rx.frag);
 876                 sc->rx.frag = NULL;
 877         }
 878
 879         if (!ah->curchan)
 880                 ah->curchan = ath9k_cmn_get_channel(hw, ah,
 881                                                     &sc->cur_chan->chandef);
 882
 883         ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
 884
 885         set_bit(ATH_OP_INVALID, &common->op_flags);
 886
 887         ath9k_hw_phy_disable(ah);
 888
 889         ath9k_hw_configpcipowersave(ah, true);
 890
 891         spin_unlock_bh(&sc->sc_pcu_lock);
 892
 893         ath9k_ps_restore(sc);
 894
 895         sc->ps_idle = prev_idle;
 896
 897         mutex_unlock(&sc->mutex);
 898
 899         ath_dbg(common, CONFIG, "Driver halt\n");
 900 }
 901
 902 static bool ath9k_uses_beacons(int type)
 903 {
 904         switch (type) {
 905         case NL80211_IFTYPE_AP:
 906         case NL80211_IFTYPE_ADHOC:
 907         case NL80211_IFTYPE_MESH_POINT:
 908                 return true;
 909         default:
 910                 return false;
 911         }
 912 }
 913
 914 static void ath9k_vif_iter(struct ath9k_vif_iter_data *iter_data,
 915                            u8 *mac, struct ieee80211_vif *vif)
 916 {
 917         struct ath_vif *avp = (struct ath_vif *)vif->drv_priv;
 918         int i;
 919
 920         if (iter_data->has_hw_macaddr) {
 921                 for (i = 0; i < ETH_ALEN; i++)
 922                         iter_data->mask[i] &=
 923                                 ~(iter_data->hw_macaddr[i] ^ mac[i]);
 924         } else {
 925                 memcpy(iter_data->hw_macaddr, mac, ETH_ALEN);
 926                 iter_data->has_hw_macaddr = true;
 927         }
 928
 929         if (!vif->bss_conf.use_short_slot)
 930                 iter_data->slottime = ATH9K_SLOT_TIME_20;
 931
 932         switch (vif->type) {
 933         case NL80211_IFTYPE_AP:
 934                 iter_data->naps++;
 935                 break;
 936         case NL80211_IFTYPE_STATION:
 937                 iter_data->nstations++;
 938                 if (avp->assoc && !iter_data->primary_sta)
 939                         iter_data->primary_sta = vif;
 940                 break;
 941         case NL80211_IFTYPE_ADHOC:
 942                 iter_data->nadhocs++;
 943                 if (vif->bss_conf.enable_beacon)
 944                         iter_data->beacons = true;
 945                 break;
 946         case NL80211_IFTYPE_MESH_POINT:
 947                 iter_data->nmeshes++;
 948                 if (vif->bss_conf.enable_beacon)
 949                         iter_data->beacons = true;
 950                 break;
 951         case NL80211_IFTYPE_WDS:
 952                 iter_data->nwds++;
 953                 break;
 954         default:
 955                 break;
 956         }
 957 }
 958
 959 static void ath9k_update_bssid_mask(struct ath_softc *sc,
 960                                     struct ath_chanctx *ctx,
 961                                     struct ath9k_vif_iter_data *iter_data)
 962 {
 963         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 964         struct ath_vif *avp;
 965         int i;
 966
 967         if (!ath9k_is_chanctx_enabled())
 968                 return;
 969
 970         list_for_each_entry(avp, &ctx->vifs, list) {
 971                 if (ctx->nvifs_assigned != 1)
 972                         continue;
 973
 974                 if (!avp->vif->p2p || !iter_data->has_hw_macaddr)
 975                         continue;
 976
 977                 ether_addr_copy(common->curbssid, avp->bssid);
 978
 979                 /* perm_addr will be used as the p2p device address. */
 980                 for (i = 0; i < ETH_ALEN; i++)
 981                         iter_data->mask[i] &=
 982                                 ~(iter_data->hw_macaddr[i] ^
 983                                   sc->hw->wiphy->perm_addr[i]);
 984         }
 985 }
 986
 987 /* Called with sc->mutex held. */
 988 void ath9k_calculate_iter_data(struct ath_softc *sc,
 989                                struct ath_chanctx *ctx,
 990                                struct ath9k_vif_iter_data *iter_data)
 991 {
 992         struct ath_vif *avp;
 993
 994         /*
 995          * The hardware will use primary station addr together with the
 996          * BSSID mask when matching addresses.
 997          */
 998         memset(iter_data, 0, sizeof(*iter_data));
 999         eth_broadcast_addr(iter_data->mask);
1000         iter_data->slottime = ATH9K_SLOT_TIME_9;
1001
1002         list_for_each_entry(avp, &ctx->vifs, list)
1003                 ath9k_vif_iter(iter_data, avp->vif->addr, avp->vif);
1004
1005         ath9k_update_bssid_mask(sc, ctx, iter_data);
1006 }
1007
1008 static void ath9k_set_assoc_state(struct ath_softc *sc,
1009                                   struct ieee80211_vif *vif, bool changed)
1010 {
1011         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1012         struct ath_vif *avp = (struct ath_vif *)vif->drv_priv;
1013         unsigned long flags;
1014
1015         set_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags);
1016
1017         ether_addr_copy(common->curbssid, avp->bssid);
1018         common->curaid = avp->aid;
1019         ath9k_hw_write_associd(sc->sc_ah);
1020
1021         if (changed) {
1022                 common->last_rssi = ATH_RSSI_DUMMY_MARKER;
1023                 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
1024
1025                 spin_lock_irqsave(&sc->sc_pm_lock, flags);
1026                 sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
1027                 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1028         }
1029
1030         if (ath9k_hw_mci_is_enabled(sc->sc_ah))
1031                 ath9k_mci_update_wlan_channels(sc, false);
1032
1033         ath_dbg(common, CONFIG,
1034                 "Primary Station interface: %pM, BSSID: %pM\n",
1035                 vif->addr, common->curbssid);
1036 }
1037
1038 #ifdef CONFIG_ATH9K_CHANNEL_CONTEXT
1039 static void ath9k_set_offchannel_state(struct ath_softc *sc)
1040 {
1041         struct ath_hw *ah = sc->sc_ah;
1042         struct ath_common *common = ath9k_hw_common(ah);
1043         struct ieee80211_vif *vif = NULL;
1044
1045         ath9k_ps_wakeup(sc);
1046
1047         if (sc->offchannel.state < ATH_OFFCHANNEL_ROC_START)
1048                 vif = sc->offchannel.scan_vif;
1049         else
1050                 vif = sc->offchannel.roc_vif;
1051
1052         if (WARN_ON(!vif))
1053                 goto exit;
1054
1055         eth_zero_addr(common->curbssid);
1056         eth_broadcast_addr(common->bssidmask);
1057         memcpy(common->macaddr, vif->addr, ETH_ALEN);
1058         common->curaid = 0;
1059         ah->opmode = vif->type;
1060         ah->imask &= ~ATH9K_INT_SWBA;
1061         ah->imask &= ~ATH9K_INT_TSFOOR;
1062         ah->slottime = ATH9K_SLOT_TIME_9;
1063
1064         ath_hw_setbssidmask(common);
1065         ath9k_hw_setopmode(ah);
1066         ath9k_hw_write_associd(sc->sc_ah);
1067         ath9k_hw_set_interrupts(ah);
1068         ath9k_hw_init_global_settings(ah);
1069
1070 exit:
1071         ath9k_ps_restore(sc);
1072 }
1073 #endif
1074
1075 /* Called with sc->mutex held. */
1076 void ath9k_calculate_summary_state(struct ath_softc *sc,
1077                                    struct ath_chanctx *ctx)
1078 {
1079         struct ath_hw *ah = sc->sc_ah;
1080         struct ath_common *common = ath9k_hw_common(ah);
1081         struct ath9k_vif_iter_data iter_data;
1082         struct ath_beacon_config *cur_conf;
1083
1084         ath_chanctx_check_active(sc, ctx);
1085
1086         if (ctx != sc->cur_chan)
1087                 return;
1088
1089 #ifdef CONFIG_ATH9K_CHANNEL_CONTEXT
1090         if (ctx == &sc->offchannel.chan)
1091                 return ath9k_set_offchannel_state(sc);
1092 #endif
1093
1094         ath9k_ps_wakeup(sc);
1095         ath9k_calculate_iter_data(sc, ctx, &iter_data);
1096
1097         if (iter_data.has_hw_macaddr)
1098                 memcpy(common->macaddr, iter_data.hw_macaddr, ETH_ALEN);
1099
1100         memcpy(common->bssidmask, iter_data.mask, ETH_ALEN);
1101         ath_hw_setbssidmask(common);
1102
1103         if (iter_data.naps > 0) {
1104                 cur_conf = &ctx->beacon;
1105                 ath9k_hw_set_tsfadjust(ah, true);
1106                 ah->opmode = NL80211_IFTYPE_AP;
1107                 if (cur_conf->enable_beacon)
1108                         iter_data.beacons = true;
1109         } else {
1110                 ath9k_hw_set_tsfadjust(ah, false);
1111
1112                 if (iter_data.nmeshes)
1113                         ah->opmode = NL80211_IFTYPE_MESH_POINT;
1114                 else if (iter_data.nwds)
1115                         ah->opmode = NL80211_IFTYPE_AP;
1116                 else if (iter_data.nadhocs)
1117                         ah->opmode = NL80211_IFTYPE_ADHOC;
1118                 else
1119                         ah->opmode = NL80211_IFTYPE_STATION;
1120         }
1121
1122         ath9k_hw_setopmode(ah);
1123
1124         ctx->switch_after_beacon = false;
1125         if ((iter_data.nstations + iter_data.nadhocs + iter_data.nmeshes) > 0)
1126                 ah->imask |= ATH9K_INT_TSFOOR;
1127         else {
1128                 ah->imask &= ~ATH9K_INT_TSFOOR;
1129                 if (iter_data.naps == 1 && iter_data.beacons)
1130                         ctx->switch_after_beacon = true;
1131         }
1132
1133         ah->imask &= ~ATH9K_INT_SWBA;
1134         if (ah->opmode == NL80211_IFTYPE_STATION) {
1135                 bool changed = (iter_data.primary_sta != ctx->primary_sta);
1136
1137                 if (iter_data.primary_sta) {
1138                         iter_data.beacons = true;
1139                         ath9k_set_assoc_state(sc, iter_data.primary_sta,
1140                                               changed);
1141                         ctx->primary_sta = iter_data.primary_sta;
1142                 } else {
1143                         ctx->primary_sta = NULL;
1144                         eth_zero_addr(common->curbssid);
1145                         common->curaid = 0;
1146                         ath9k_hw_write_associd(sc->sc_ah);
1147                         if (ath9k_hw_mci_is_enabled(sc->sc_ah))
1148                                 ath9k_mci_update_wlan_channels(sc, true);
1149                 }
1150         } else if (iter_data.beacons) {
1151                 ah->imask |= ATH9K_INT_SWBA;
1152         }
1153         ath9k_hw_set_interrupts(ah);
1154
1155         if (iter_data.beacons)
1156                 set_bit(ATH_OP_BEACONS, &common->op_flags);
1157         else
1158                 clear_bit(ATH_OP_BEACONS, &common->op_flags);
1159
1160         if (ah->slottime != iter_data.slottime) {
1161                 ah->slottime = iter_data.slottime;
1162                 ath9k_hw_init_global_settings(ah);
1163         }
1164
1165         if (iter_data.primary_sta)
1166                 set_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags);
1167         else
1168                 clear_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags);
1169
1170         ath_dbg(common, CONFIG,
1171                 "macaddr: %pM, bssid: %pM, bssidmask: %pM\n",
1172                 common->macaddr, common->curbssid, common->bssidmask);
1173
1174         ath9k_ps_restore(sc);
1175 }
1176
1177 static void ath9k_tpc_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1178 {
1179         int *power = (int *)data;
1180
1181         if (*power < vif->bss_conf.txpower)
1182                 *power = vif->bss_conf.txpower;
1183 }
1184
1185 /* Called with sc->mutex held. */
1186 void ath9k_set_txpower(struct ath_softc *sc, struct ieee80211_vif *vif)
1187 {
1188         int power;
1189         struct ath_hw *ah = sc->sc_ah;
1190         struct ath_regulatory *reg = ath9k_hw_regulatory(ah);
1191
1192         ath9k_ps_wakeup(sc);
1193         if (ah->tpc_enabled) {
1194                 power = (vif) ? vif->bss_conf.txpower : -1;
1195                 ieee80211_iterate_active_interfaces_atomic(
1196                                 sc->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
1197                                 ath9k_tpc_vif_iter, &power);
1198                 if (power == -1)
1199                         power = sc->hw->conf.power_level;
1200         } else {
1201                 power = sc->hw->conf.power_level;
1202         }
1203         sc->cur_chan->txpower = 2 * power;
1204         ath9k_hw_set_txpowerlimit(ah, sc->cur_chan->txpower, false);
1205         sc->cur_chan->cur_txpower = reg->max_power_level;
1206         ath9k_ps_restore(sc);
1207 }
1208
1209 static void ath9k_assign_hw_queues(struct ieee80211_hw *hw,
1210                                    struct ieee80211_vif *vif)
1211 {
1212         int i;
1213
1214         if (!ath9k_is_chanctx_enabled())
1215                 return;
1216
1217         for (i = 0; i < IEEE80211_NUM_ACS; i++)
1218                 vif->hw_queue[i] = i;
1219
1220         if (vif->type == NL80211_IFTYPE_AP ||
1221             vif->type == NL80211_IFTYPE_MESH_POINT)
1222                 vif->cab_queue = hw->queues - 2;
1223         else
1224                 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1225 }
1226
1227 static int ath9k_add_interface(struct ieee80211_hw *hw,
1228                                struct ieee80211_vif *vif)
1229 {
1230         struct ath_softc *sc = hw->priv;
1231         struct ath_hw *ah = sc->sc_ah;
1232         struct ath_common *common = ath9k_hw_common(ah);
1233         struct ath_vif *avp = (void *)vif->drv_priv;
1234         struct ath_node *an = &avp->mcast_node;
1235
1236         mutex_lock(&sc->mutex);
1237
1238         if (config_enabled(CONFIG_ATH9K_TX99)) {
1239                 if (sc->cur_chan->nvifs >= 1) {
1240                         mutex_unlock(&sc->mutex);
1241                         return -EOPNOTSUPP;
1242                 }
1243                 sc->tx99_vif = vif;
1244         }
1245
1246         ath_dbg(common, CONFIG, "Attach a VIF of type: %d\n", vif->type);
1247         sc->cur_chan->nvifs++;
1248
1249         if (ath9k_uses_beacons(vif->type))
1250                 ath9k_beacon_assign_slot(sc, vif);
1251
1252         avp->vif = vif;
1253         if (!ath9k_is_chanctx_enabled()) {
1254                 avp->chanctx = sc->cur_chan;
1255                 list_add_tail(&avp->list, &avp->chanctx->vifs);
1256         }
1257
1258         ath9k_calculate_summary_state(sc, avp->chanctx);
1259
1260         ath9k_assign_hw_queues(hw, vif);
1261
1262         ath9k_set_txpower(sc, vif);
1263
1264         an->sc = sc;
1265         an->sta = NULL;
1266         an->vif = vif;
1267         an->no_ps_filter = true;
1268         ath_tx_node_init(sc, an);
1269
1270         mutex_unlock(&sc->mutex);
1271         return 0;
1272 }
1273
1274 static int ath9k_change_interface(struct ieee80211_hw *hw,
1275                                   struct ieee80211_vif *vif,
1276                                   enum nl80211_iftype new_type,
1277                                   bool p2p)
1278 {
1279         struct ath_softc *sc = hw->priv;
1280         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1281         struct ath_vif *avp = (void *)vif->drv_priv;
1282
1283         mutex_lock(&sc->mutex);
1284
1285         if (config_enabled(CONFIG_ATH9K_TX99)) {
1286                 mutex_unlock(&sc->mutex);
1287                 return -EOPNOTSUPP;
1288         }
1289
1290         ath_dbg(common, CONFIG, "Change Interface\n");
1291
1292         if (ath9k_uses_beacons(vif->type))
1293                 ath9k_beacon_remove_slot(sc, vif);
1294
1295         vif->type = new_type;
1296         vif->p2p = p2p;
1297
1298         if (ath9k_uses_beacons(vif->type))
1299                 ath9k_beacon_assign_slot(sc, vif);
1300
1301         ath9k_assign_hw_queues(hw, vif);
1302         ath9k_calculate_summary_state(sc, avp->chanctx);
1303
1304         ath9k_set_txpower(sc, vif);
1305
1306         mutex_unlock(&sc->mutex);
1307         return 0;
1308 }
1309
1310 static void ath9k_remove_interface(struct ieee80211_hw *hw,
1311                                    struct ieee80211_vif *vif)
1312 {
1313         struct ath_softc *sc = hw->priv;
1314         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1315         struct ath_vif *avp = (void *)vif->drv_priv;
1316
1317         ath_dbg(common, CONFIG, "Detach Interface\n");
1318
1319         mutex_lock(&sc->mutex);
1320
1321         ath9k_p2p_remove_vif(sc, vif);
1322
1323         sc->cur_chan->nvifs--;
1324         sc->tx99_vif = NULL;
1325         if (!ath9k_is_chanctx_enabled())
1326                 list_del(&avp->list);
1327
1328         if (ath9k_uses_beacons(vif->type))
1329                 ath9k_beacon_remove_slot(sc, vif);
1330
1331         ath_tx_node_cleanup(sc, &avp->mcast_node);
1332
1333         ath9k_calculate_summary_state(sc, avp->chanctx);
1334
1335         ath9k_set_txpower(sc, NULL);
1336
1337         mutex_unlock(&sc->mutex);
1338 }
1339
1340 static void ath9k_enable_ps(struct ath_softc *sc)
1341 {
1342         struct ath_hw *ah = sc->sc_ah;
1343         struct ath_common *common = ath9k_hw_common(ah);
1344
1345         if (config_enabled(CONFIG_ATH9K_TX99))
1346                 return;
1347
1348         sc->ps_enabled = true;
1349         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1350                 if ((ah->imask & ATH9K_INT_TIM_TIMER) == 0) {
1351                         ah->imask |= ATH9K_INT_TIM_TIMER;
1352                         ath9k_hw_set_interrupts(ah);
1353                 }
1354                 ath9k_hw_setrxabort(ah, 1);
1355         }
1356         ath_dbg(common, PS, "PowerSave enabled\n");
1357 }
1358
1359 static void ath9k_disable_ps(struct ath_softc *sc)
1360 {
1361         struct ath_hw *ah = sc->sc_ah;
1362         struct ath_common *common = ath9k_hw_common(ah);
1363
1364         if (config_enabled(CONFIG_ATH9K_TX99))
1365                 return;
1366
1367         sc->ps_enabled = false;
1368         ath9k_hw_setpower(ah, ATH9K_PM_AWAKE);
1369         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1370                 ath9k_hw_setrxabort(ah, 0);
1371                 sc->ps_flags &= ~(PS_WAIT_FOR_BEACON |
1372                                   PS_WAIT_FOR_CAB |
1373                                   PS_WAIT_FOR_PSPOLL_DATA |
1374                                   PS_WAIT_FOR_TX_ACK);
1375                 if (ah->imask & ATH9K_INT_TIM_TIMER) {
1376                         ah->imask &= ~ATH9K_INT_TIM_TIMER;
1377                         ath9k_hw_set_interrupts(ah);
1378                 }
1379         }
1380         ath_dbg(common, PS, "PowerSave disabled\n");
1381 }
1382
1383 static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
1384 {
1385         struct ath_softc *sc = hw->priv;
1386         struct ath_hw *ah = sc->sc_ah;
1387         struct ath_common *common = ath9k_hw_common(ah);
1388         struct ieee80211_conf *conf = &hw->conf;
1389         struct ath_chanctx *ctx = sc->cur_chan;
1390
1391         ath9k_ps_wakeup(sc);
1392         mutex_lock(&sc->mutex);
1393
1394         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
1395                 sc->ps_idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1396                 if (sc->ps_idle) {
1397                         ath_cancel_work(sc);
1398                         ath9k_stop_btcoex(sc);
1399                 } else {
1400                         ath9k_start_btcoex(sc);
1401                         /*
1402                          * The chip needs a reset to properly wake up from
1403                          * full sleep
1404                          */
1405                         ath_chanctx_set_channel(sc, ctx, &ctx->chandef);
1406                 }
1407         }
1408
1409         /*
1410          * We just prepare to enable PS. We have to wait until our AP has
1411          * ACK'd our null data frame to disable RX otherwise we'll ignore
1412          * those ACKs and end up retransmitting the same null data frames.
1413          * IEEE80211_CONF_CHANGE_PS is only passed by mac80211 for STA mode.
1414          */
1415         if (changed & IEEE80211_CONF_CHANGE_PS) {
1416                 unsigned long flags;
1417                 spin_lock_irqsave(&sc->sc_pm_lock, flags);
1418                 if (conf->flags & IEEE80211_CONF_PS)
1419                         ath9k_enable_ps(sc);
1420                 else
1421                         ath9k_disable_ps(sc);
1422                 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1423         }
1424
1425         if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
1426                 if (conf->flags & IEEE80211_CONF_MONITOR) {
1427                         ath_dbg(common, CONFIG, "Monitor mode is enabled\n");
1428                         sc->sc_ah->is_monitoring = true;
1429                 } else {
1430                         ath_dbg(common, CONFIG, "Monitor mode is disabled\n");
1431                         sc->sc_ah->is_monitoring = false;
1432                 }
1433         }
1434
1435         if (!ath9k_is_chanctx_enabled() && (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
1436                 ctx->offchannel = !!(conf->flags & IEEE80211_CONF_OFFCHANNEL);
1437                 ath_chanctx_set_channel(sc, ctx, &hw->conf.chandef);
1438         }
1439
1440         mutex_unlock(&sc->mutex);
1441         ath9k_ps_restore(sc);
1442
1443         return 0;
1444 }
1445
1446 #define SUPPORTED_FILTERS                       \
1447         (FIF_PROMISC_IN_BSS |                   \
1448         FIF_ALLMULTI |                          \
1449         FIF_CONTROL |                           \
1450         FIF_PSPOLL |                            \
1451         FIF_OTHER_BSS |                         \
1452         FIF_BCN_PRBRESP_PROMISC |               \
1453         FIF_PROBE_REQ |                         \
1454         FIF_FCSFAIL)
1455
1456 /* FIXME: sc->sc_full_reset ? */
1457 static void ath9k_configure_filter(struct ieee80211_hw *hw,
1458                                    unsigned int changed_flags,
1459                                    unsigned int *total_flags,
1460                                    u64 multicast)
1461 {
1462         struct ath_softc *sc = hw->priv;
1463         u32 rfilt;
1464
1465         changed_flags &= SUPPORTED_FILTERS;
1466         *total_flags &= SUPPORTED_FILTERS;
1467
1468         spin_lock_bh(&sc->chan_lock);
1469         sc->cur_chan->rxfilter = *total_flags;
1470         spin_unlock_bh(&sc->chan_lock);
1471
1472         ath9k_ps_wakeup(sc);
1473         rfilt = ath_calcrxfilter(sc);
1474         ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1475         ath9k_ps_restore(sc);
1476
1477         ath_dbg(ath9k_hw_common(sc->sc_ah), CONFIG, "Set HW RX filter: 0x%x\n",
1478                 rfilt);
1479 }
1480
1481 static int ath9k_sta_add(struct ieee80211_hw *hw,
1482                          struct ieee80211_vif *vif,
1483                          struct ieee80211_sta *sta)
1484 {
1485         struct ath_softc *sc = hw->priv;
1486         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1487         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1488         struct ieee80211_key_conf ps_key = { };
1489         int key;
1490
1491         ath_node_attach(sc, sta, vif);
1492
1493         if (vif->type != NL80211_IFTYPE_AP &&
1494             vif->type != NL80211_IFTYPE_AP_VLAN)
1495                 return 0;
1496
1497         key = ath_key_config(common, vif, sta, &ps_key);
1498         if (key > 0) {
1499                 an->ps_key = key;
1500                 an->key_idx[0] = key;
1501         }
1502
1503         return 0;
1504 }
1505
1506 static void ath9k_del_ps_key(struct ath_softc *sc,
1507                              struct ieee80211_vif *vif,
1508                              struct ieee80211_sta *sta)
1509 {
1510         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1511         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1512         struct ieee80211_key_conf ps_key = { .hw_key_idx = an->ps_key };
1513
1514         if (!an->ps_key)
1515             return;
1516
1517         ath_key_delete(common, &ps_key);
1518         an->ps_key = 0;
1519         an->key_idx[0] = 0;
1520 }
1521
1522 static int ath9k_sta_remove(struct ieee80211_hw *hw,
1523                             struct ieee80211_vif *vif,
1524                             struct ieee80211_sta *sta)
1525 {
1526         struct ath_softc *sc = hw->priv;
1527
1528         ath9k_del_ps_key(sc, vif, sta);
1529         ath_node_detach(sc, sta);
1530
1531         return 0;
1532 }
1533
1534 static int ath9k_sta_state(struct ieee80211_hw *hw,
1535                            struct ieee80211_vif *vif,
1536                            struct ieee80211_sta *sta,
1537                            enum ieee80211_sta_state old_state,
1538                            enum ieee80211_sta_state new_state)
1539 {
1540         struct ath_softc *sc = hw->priv;
1541         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1542         int ret = 0;
1543
1544         if (old_state == IEEE80211_STA_AUTH &&
1545             new_state == IEEE80211_STA_ASSOC) {
1546                 ret = ath9k_sta_add(hw, vif, sta);
1547                 ath_dbg(common, CONFIG,
1548                         "Add station: %pM\n", sta->addr);
1549         } else if (old_state == IEEE80211_STA_ASSOC &&
1550                    new_state == IEEE80211_STA_AUTH) {
1551                 ret = ath9k_sta_remove(hw, vif, sta);
1552                 ath_dbg(common, CONFIG,
1553                         "Remove station: %pM\n", sta->addr);
1554         }
1555
1556         if (ath9k_is_chanctx_enabled()) {
1557                 if (vif->type == NL80211_IFTYPE_STATION) {
1558                         if (old_state == IEEE80211_STA_ASSOC &&
1559                             new_state == IEEE80211_STA_AUTHORIZED)
1560                                 ath_chanctx_event(sc, vif,
1561                                                   ATH_CHANCTX_EVENT_AUTHORIZED);
1562                 }
1563         }
1564
1565         return ret;
1566 }
1567
1568 static void ath9k_sta_set_tx_filter(struct ath_hw *ah,
1569                                     struct ath_node *an,
1570                                     bool set)
1571 {
1572         int i;
1573
1574         for (i = 0; i < ARRAY_SIZE(an->key_idx); i++) {
1575                 if (!an->key_idx[i])
1576                         continue;
1577                 ath9k_hw_set_tx_filter(ah, an->key_idx[i], set);
1578         }
1579 }
1580
1581 static void ath9k_sta_notify(struct ieee80211_hw *hw,
1582                          struct ieee80211_vif *vif,
1583                          enum sta_notify_cmd cmd,
1584                          struct ieee80211_sta *sta)
1585 {
1586         struct ath_softc *sc = hw->priv;
1587         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1588
1589         switch (cmd) {
1590         case STA_NOTIFY_SLEEP:
1591                 an->sleeping = true;
1592                 ath_tx_aggr_sleep(sta, sc, an);
1593                 ath9k_sta_set_tx_filter(sc->sc_ah, an, true);
1594                 break;
1595         case STA_NOTIFY_AWAKE:
1596                 ath9k_sta_set_tx_filter(sc->sc_ah, an, false);
1597                 an->sleeping = false;
1598                 ath_tx_aggr_wakeup(sc, an);
1599                 break;
1600         }
1601 }
1602
1603 static int ath9k_conf_tx(struct ieee80211_hw *hw,
1604                          struct ieee80211_vif *vif, u16 queue,
1605                          const struct ieee80211_tx_queue_params *params)
1606 {
1607         struct ath_softc *sc = hw->priv;
1608         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1609         struct ath_txq *txq;
1610         struct ath9k_tx_queue_info qi;
1611         int ret = 0;
1612
1613         if (queue >= IEEE80211_NUM_ACS)
1614                 return 0;
1615
1616         txq = sc->tx.txq_map[queue];
1617
1618         ath9k_ps_wakeup(sc);
1619         mutex_lock(&sc->mutex);
1620
1621         memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
1622
1623         qi.tqi_aifs = params->aifs;
1624         qi.tqi_cwmin = params->cw_min;
1625         qi.tqi_cwmax = params->cw_max;
1626         qi.tqi_burstTime = params->txop * 32;
1627
1628         ath_dbg(common, CONFIG,
1629                 "Configure tx [queue/halq] [%d/%d], aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
1630                 queue, txq->axq_qnum, params->aifs, params->cw_min,
1631                 params->cw_max, params->txop);
1632
1633         ath_update_max_aggr_framelen(sc, queue, qi.tqi_burstTime);
1634         ret = ath_txq_update(sc, txq->axq_qnum, &qi);
1635         if (ret)
1636                 ath_err(common, "TXQ Update failed\n");
1637
1638         mutex_unlock(&sc->mutex);
1639         ath9k_ps_restore(sc);
1640
1641         return ret;
1642 }
1643
1644 static int ath9k_set_key(struct ieee80211_hw *hw,
1645                          enum set_key_cmd cmd,
1646                          struct ieee80211_vif *vif,
1647                          struct ieee80211_sta *sta,
1648                          struct ieee80211_key_conf *key)
1649 {
1650         struct ath_softc *sc = hw->priv;
1651         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1652         struct ath_node *an = NULL;
1653         int ret = 0, i;
1654
1655         if (ath9k_modparam_nohwcrypt)
1656                 return -ENOSPC;
1657
1658         if ((vif->type == NL80211_IFTYPE_ADHOC ||
1659              vif->type == NL80211_IFTYPE_MESH_POINT) &&
1660             (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
1661              key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
1662             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
1663                 /*
1664                  * For now, disable hw crypto for the RSN IBSS group keys. This
1665                  * could be optimized in the future to use a modified key cache
1666                  * design to support per-STA RX GTK, but until that gets
1667                  * implemented, use of software crypto for group addressed
1668                  * frames is a acceptable to allow RSN IBSS to be used.
1669                  */
1670                 return -EOPNOTSUPP;
1671         }
1672
1673         mutex_lock(&sc->mutex);
1674         ath9k_ps_wakeup(sc);
1675         ath_dbg(common, CONFIG, "Set HW Key %d\n", cmd);
1676         if (sta)
1677                 an = (struct ath_node *)sta->drv_priv;
1678
1679         switch (cmd) {
1680         case SET_KEY:
1681                 if (sta)
1682                         ath9k_del_ps_key(sc, vif, sta);
1683
1684                 key->hw_key_idx = 0;
1685                 ret = ath_key_config(common, vif, sta, key);
1686                 if (ret >= 0) {
1687                         key->hw_key_idx = ret;
1688                         /* push IV and Michael MIC generation to stack */
1689                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1690                         if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
1691                                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1692                         if (sc->sc_ah->sw_mgmt_crypto_tx &&
1693                             key->cipher == WLAN_CIPHER_SUITE_CCMP)
1694                                 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT_TX;
1695                         ret = 0;
1696                 }
1697                 if (an && key->hw_key_idx) {
1698                         for (i = 0; i < ARRAY_SIZE(an->key_idx); i++) {
1699                                 if (an->key_idx[i])
1700                                         continue;
1701                                 an->key_idx[i] = key->hw_key_idx;
1702                                 break;
1703                         }
1704                         WARN_ON(i == ARRAY_SIZE(an->key_idx));
1705                 }
1706                 break;
1707         case DISABLE_KEY:
1708                 ath_key_delete(common, key);
1709                 if (an) {
1710                         for (i = 0; i < ARRAY_SIZE(an->key_idx); i++) {
1711                                 if (an->key_idx[i] != key->hw_key_idx)
1712                                         continue;
1713                                 an->key_idx[i] = 0;
1714                                 break;
1715                         }
1716                 }
1717                 key->hw_key_idx = 0;
1718                 break;
1719         default:
1720                 ret = -EINVAL;
1721         }
1722
1723         ath9k_ps_restore(sc);
1724         mutex_unlock(&sc->mutex);
1725
1726         return ret;
1727 }
1728
1729 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
1730                                    struct ieee80211_vif *vif,
1731                                    struct ieee80211_bss_conf *bss_conf,
1732                                    u32 changed)
1733 {
1734 #define CHECK_ANI                               \
1735         (BSS_CHANGED_ASSOC |                    \
1736          BSS_CHANGED_IBSS |                     \
1737          BSS_CHANGED_BEACON_ENABLED)
1738
1739         struct ath_softc *sc = hw->priv;
1740         struct ath_hw *ah = sc->sc_ah;
1741         struct ath_common *common = ath9k_hw_common(ah);
1742         struct ath_vif *avp = (void *)vif->drv_priv;
1743         int slottime;
1744
1745         ath9k_ps_wakeup(sc);
1746         mutex_lock(&sc->mutex);
1747
1748         if (changed & BSS_CHANGED_ASSOC) {
1749                 ath_dbg(common, CONFIG, "BSSID %pM Changed ASSOC %d\n",
1750                         bss_conf->bssid, bss_conf->assoc);
1751
1752                 memcpy(avp->bssid, bss_conf->bssid, ETH_ALEN);
1753                 avp->aid = bss_conf->aid;
1754                 avp->assoc = bss_conf->assoc;
1755
1756                 ath9k_calculate_summary_state(sc, avp->chanctx);
1757         }
1758
1759         if (changed & BSS_CHANGED_IBSS) {
1760                 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1761                 common->curaid = bss_conf->aid;
1762                 ath9k_hw_write_associd(sc->sc_ah);
1763         }
1764
1765         if ((changed & BSS_CHANGED_BEACON_ENABLED) ||
1766             (changed & BSS_CHANGED_BEACON_INT) ||
1767             (changed & BSS_CHANGED_BEACON_INFO)) {
1768                 ath9k_beacon_config(sc, vif, changed);
1769                 if (changed & BSS_CHANGED_BEACON_ENABLED)
1770                         ath9k_calculate_summary_state(sc, avp->chanctx);
1771         }
1772
1773         if ((avp->chanctx == sc->cur_chan) &&
1774             (changed & BSS_CHANGED_ERP_SLOT)) {
1775                 if (bss_conf->use_short_slot)
1776                         slottime = 9;
1777                 else
1778                         slottime = 20;
1779                 if (vif->type == NL80211_IFTYPE_AP) {
1780                         /*
1781                          * Defer update, so that connected stations can adjust
1782                          * their settings at the same time.
1783                          * See beacon.c for more details
1784                          */
1785                         sc->beacon.slottime = slottime;
1786                         sc->beacon.updateslot = UPDATE;
1787                 } else {
1788                         ah->slottime = slottime;
1789                         ath9k_hw_init_global_settings(ah);
1790                 }
1791         }
1792
1793         if (changed & BSS_CHANGED_P2P_PS)
1794                 ath9k_p2p_bss_info_changed(sc, vif);
1795
1796         if (changed & CHECK_ANI)
1797                 ath_check_ani(sc);
1798
1799         if (changed & BSS_CHANGED_TXPOWER) {
1800                 ath_dbg(common, CONFIG, "vif %pM power %d dbm power_type %d\n",
1801                         vif->addr, bss_conf->txpower, bss_conf->txpower_type);
1802                 ath9k_set_txpower(sc, vif);
1803         }
1804
1805         mutex_unlock(&sc->mutex);
1806         ath9k_ps_restore(sc);
1807
1808 #undef CHECK_ANI
1809 }
1810
1811 static u64 ath9k_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1812 {
1813         struct ath_softc *sc = hw->priv;
1814         u64 tsf;
1815
1816         mutex_lock(&sc->mutex);
1817         ath9k_ps_wakeup(sc);
1818         tsf = ath9k_hw_gettsf64(sc->sc_ah);
1819         ath9k_ps_restore(sc);
1820         mutex_unlock(&sc->mutex);
1821
1822         return tsf;
1823 }
1824
1825 static void ath9k_set_tsf(struct ieee80211_hw *hw,
1826                           struct ieee80211_vif *vif,
1827                           u64 tsf)
1828 {
1829         struct ath_softc *sc = hw->priv;
1830
1831         mutex_lock(&sc->mutex);
1832         ath9k_ps_wakeup(sc);
1833         ath9k_hw_settsf64(sc->sc_ah, tsf);
1834         ath9k_ps_restore(sc);
1835         mutex_unlock(&sc->mutex);
1836 }
1837
1838 static void ath9k_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1839 {
1840         struct ath_softc *sc = hw->priv;
1841
1842         mutex_lock(&sc->mutex);
1843
1844         ath9k_ps_wakeup(sc);
1845         ath9k_hw_reset_tsf(sc->sc_ah);
1846         ath9k_ps_restore(sc);
1847
1848         mutex_unlock(&sc->mutex);
1849 }
1850
1851 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
1852                               struct ieee80211_vif *vif,
1853                               enum ieee80211_ampdu_mlme_action action,
1854                               struct ieee80211_sta *sta,
1855                               u16 tid, u16 *ssn, u8 buf_size)
1856 {
1857         struct ath_softc *sc = hw->priv;
1858         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1859         bool flush = false;
1860         int ret = 0;
1861
1862         mutex_lock(&sc->mutex);
1863
1864         switch (action) {
1865         case IEEE80211_AMPDU_RX_START:
1866                 break;
1867         case IEEE80211_AMPDU_RX_STOP:
1868                 break;
1869         case IEEE80211_AMPDU_TX_START:
1870                 if (ath9k_is_chanctx_enabled()) {
1871                         if (test_bit(ATH_OP_SCANNING, &common->op_flags)) {
1872                                 ret = -EBUSY;
1873                                 break;
1874                         }
1875                 }
1876                 ath9k_ps_wakeup(sc);
1877                 ret = ath_tx_aggr_start(sc, sta, tid, ssn);
1878                 if (!ret)
1879                         ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1880                 ath9k_ps_restore(sc);
1881                 break;
1882         case IEEE80211_AMPDU_TX_STOP_FLUSH:
1883         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1884                 flush = true;
1885         case IEEE80211_AMPDU_TX_STOP_CONT:
1886                 ath9k_ps_wakeup(sc);
1887                 ath_tx_aggr_stop(sc, sta, tid);
1888                 if (!flush)
1889                         ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1890                 ath9k_ps_restore(sc);
1891                 break;
1892         case IEEE80211_AMPDU_TX_OPERATIONAL:
1893                 ath9k_ps_wakeup(sc);
1894                 ath_tx_aggr_resume(sc, sta, tid);
1895                 ath9k_ps_restore(sc);
1896                 break;
1897         default:
1898                 ath_err(ath9k_hw_common(sc->sc_ah), "Unknown AMPDU action\n");
1899         }
1900
1901         mutex_unlock(&sc->mutex);
1902
1903         return ret;
1904 }
1905
1906 static int ath9k_get_survey(struct ieee80211_hw *hw, int idx,
1907                              struct survey_info *survey)
1908 {
1909         struct ath_softc *sc = hw->priv;
1910         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1911         struct ieee80211_supported_band *sband;
1912         struct ieee80211_channel *chan;
1913         int pos;
1914
1915         if (config_enabled(CONFIG_ATH9K_TX99))
1916                 return -EOPNOTSUPP;
1917
1918         spin_lock_bh(&common->cc_lock);
1919         if (idx == 0)
1920                 ath_update_survey_stats(sc);
1921
1922         sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ];
1923         if (sband && idx >= sband->n_channels) {
1924                 idx -= sband->n_channels;
1925                 sband = NULL;
1926         }
1927
1928         if (!sband)
1929                 sband = hw->wiphy->bands[IEEE80211_BAND_5GHZ];
1930
1931         if (!sband || idx >= sband->n_channels) {
1932                 spin_unlock_bh(&common->cc_lock);
1933                 return -ENOENT;
1934         }
1935
1936         chan = &sband->channels[idx];
1937         pos = chan->hw_value;
1938         memcpy(survey, &sc->survey[pos], sizeof(*survey));
1939         survey->channel = chan;
1940         spin_unlock_bh(&common->cc_lock);
1941
1942         return 0;
1943 }
1944
1945 static void ath9k_enable_dynack(struct ath_softc *sc)
1946 {
1947 #ifdef CONFIG_ATH9K_DYNACK
1948         u32 rfilt;
1949         struct ath_hw *ah = sc->sc_ah;
1950
1951         ath_dynack_reset(ah);
1952
1953         ah->dynack.enabled = true;
1954         rfilt = ath_calcrxfilter(sc);
1955         ath9k_hw_setrxfilter(ah, rfilt);
1956 #endif
1957 }
1958
1959 static void ath9k_set_coverage_class(struct ieee80211_hw *hw,
1960                                      s16 coverage_class)
1961 {
1962         struct ath_softc *sc = hw->priv;
1963         struct ath_hw *ah = sc->sc_ah;
1964
1965         if (config_enabled(CONFIG_ATH9K_TX99))
1966                 return;
1967
1968         mutex_lock(&sc->mutex);
1969
1970         if (coverage_class >= 0) {
1971                 ah->coverage_class = coverage_class;
1972                 if (ah->dynack.enabled) {
1973                         u32 rfilt;
1974
1975                         ah->dynack.enabled = false;
1976                         rfilt = ath_calcrxfilter(sc);
1977                         ath9k_hw_setrxfilter(ah, rfilt);
1978                 }
1979                 ath9k_ps_wakeup(sc);
1980                 ath9k_hw_init_global_settings(ah);
1981                 ath9k_ps_restore(sc);
1982         } else if (!ah->dynack.enabled) {
1983                 ath9k_enable_dynack(sc);
1984         }
1985
1986         mutex_unlock(&sc->mutex);
1987 }
1988
1989 static bool ath9k_has_tx_pending(struct ath_softc *sc,
1990                                  bool sw_pending)
1991 {
1992         int i, npend = 0;
1993
1994         for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
1995                 if (!ATH_TXQ_SETUP(sc, i))
1996                         continue;
1997
1998                 npend = ath9k_has_pending_frames(sc, &sc->tx.txq[i],
1999                                                  sw_pending);
2000                 if (npend)
2001                         break;
2002         }
2003
2004         return !!npend;
2005 }
2006
2007 static void ath9k_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2008                         u32 queues, bool drop)
2009 {
2010         struct ath_softc *sc = hw->priv;
2011         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2012
2013         if (ath9k_is_chanctx_enabled()) {
2014                 if (!test_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags))
2015                         goto flush;
2016
2017                 /*
2018                  * If MCC is active, extend the flush timeout
2019                  * and wait for the HW/SW queues to become
2020                  * empty. This needs to be done outside the
2021                  * sc->mutex lock to allow the channel scheduler
2022                  * to switch channel contexts.
2023                  *
2024                  * The vif queues have been stopped in mac80211,
2025                  * so there won't be any incoming frames.
2026                  */
2027                 __ath9k_flush(hw, queues, drop, true, true);
2028                 return;
2029         }
2030 flush:
2031         mutex_lock(&sc->mutex);
2032         __ath9k_flush(hw, queues, drop, true, false);
2033         mutex_unlock(&sc->mutex);
2034 }
2035
2036 void __ath9k_flush(struct ieee80211_hw *hw, u32 queues, bool drop,
2037                    bool sw_pending, bool timeout_override)
2038 {
2039         struct ath_softc *sc = hw->priv;
2040         struct ath_hw *ah = sc->sc_ah;
2041         struct ath_common *common = ath9k_hw_common(ah);
2042         int timeout;
2043         bool drain_txq;
2044
2045         cancel_delayed_work_sync(&sc->tx_complete_work);
2046
2047         if (ah->ah_flags & AH_UNPLUGGED) {
2048                 ath_dbg(common, ANY, "Device has been unplugged!\n");
2049                 return;
2050         }
2051
2052         if (test_bit(ATH_OP_INVALID, &common->op_flags)) {
2053                 ath_dbg(common, ANY, "Device not present\n");
2054                 return;
2055         }
2056
2057         spin_lock_bh(&sc->chan_lock);
2058         if (timeout_override)
2059                 timeout = HZ / 5;
2060         else
2061                 timeout = sc->cur_chan->flush_timeout;
2062         spin_unlock_bh(&sc->chan_lock);
2063
2064         ath_dbg(common, CHAN_CTX,
2065                 "Flush timeout: %d\n", jiffies_to_msecs(timeout));
2066
2067         if (wait_event_timeout(sc->tx_wait, !ath9k_has_tx_pending(sc, sw_pending),
2068                                timeout) > 0)
2069                 drop = false;
2070
2071         if (drop) {
2072                 ath9k_ps_wakeup(sc);
2073                 spin_lock_bh(&sc->sc_pcu_lock);
2074                 drain_txq = ath_drain_all_txq(sc);
2075                 spin_unlock_bh(&sc->sc_pcu_lock);
2076
2077                 if (!drain_txq)
2078                         ath_reset(sc, NULL);
2079
2080                 ath9k_ps_restore(sc);
2081         }
2082
2083         ieee80211_queue_delayed_work(hw, &sc->tx_complete_work, 0);
2084 }
2085
2086 static bool ath9k_tx_frames_pending(struct ieee80211_hw *hw)
2087 {
2088         struct ath_softc *sc = hw->priv;
2089
2090         return ath9k_has_tx_pending(sc, true);
2091 }
2092
2093 static int ath9k_tx_last_beacon(struct ieee80211_hw *hw)
2094 {
2095         struct ath_softc *sc = hw->priv;
2096         struct ath_hw *ah = sc->sc_ah;
2097         struct ieee80211_vif *vif;
2098         struct ath_vif *avp;
2099         struct ath_buf *bf;
2100         struct ath_tx_status ts;
2101         bool edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA);
2102         int status;
2103
2104         vif = sc->beacon.bslot[0];
2105         if (!vif)
2106                 return 0;
2107
2108         if (!vif->bss_conf.enable_beacon)
2109                 return 0;
2110
2111         avp = (void *)vif->drv_priv;
2112
2113         if (!sc->beacon.tx_processed && !edma) {
2114                 tasklet_disable(&sc->bcon_tasklet);
2115
2116                 bf = avp->av_bcbuf;
2117                 if (!bf || !bf->bf_mpdu)
2118                         goto skip;
2119
2120                 status = ath9k_hw_txprocdesc(ah, bf->bf_desc, &ts);
2121                 if (status == -EINPROGRESS)
2122                         goto skip;
2123
2124                 sc->beacon.tx_processed = true;
2125                 sc->beacon.tx_last = !(ts.ts_status & ATH9K_TXERR_MASK);
2126
2127 skip:
2128                 tasklet_enable(&sc->bcon_tasklet);
2129         }
2130
2131         return sc->beacon.tx_last;
2132 }
2133
2134 static int ath9k_get_stats(struct ieee80211_hw *hw,
2135                            struct ieee80211_low_level_stats *stats)
2136 {
2137         struct ath_softc *sc = hw->priv;
2138         struct ath_hw *ah = sc->sc_ah;
2139         struct ath9k_mib_stats *mib_stats = &ah->ah_mibStats;
2140
2141         stats->dot11ACKFailureCount = mib_stats->ackrcv_bad;
2142         stats->dot11RTSFailureCount = mib_stats->rts_bad;
2143         stats->dot11FCSErrorCount = mib_stats->fcs_bad;
2144         stats->dot11RTSSuccessCount = mib_stats->rts_good;
2145         return 0;
2146 }
2147
2148 static u32 fill_chainmask(u32 cap, u32 new)
2149 {
2150         u32 filled = 0;
2151         int i;
2152
2153         for (i = 0; cap && new; i++, cap >>= 1) {
2154                 if (!(cap & BIT(0)))
2155                         continue;
2156
2157                 if (new & BIT(0))
2158                         filled |= BIT(i);
2159
2160                 new >>= 1;
2161         }
2162
2163         return filled;
2164 }
2165
2166 static bool validate_antenna_mask(struct ath_hw *ah, u32 val)
2167 {
2168         if (AR_SREV_9300_20_OR_LATER(ah))
2169                 return true;
2170
2171         switch (val & 0x7) {
2172         case 0x1:
2173         case 0x3:
2174         case 0x7:
2175                 return true;
2176         case 0x2:
2177                 return (ah->caps.rx_chainmask == 1);
2178         default:
2179                 return false;
2180         }
2181 }
2182
2183 static int ath9k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
2184 {
2185         struct ath_softc *sc = hw->priv;
2186         struct ath_hw *ah = sc->sc_ah;
2187
2188         if (ah->caps.rx_chainmask != 1)
2189                 rx_ant |= tx_ant;
2190
2191         if (!validate_antenna_mask(ah, rx_ant) || !tx_ant)
2192                 return -EINVAL;
2193
2194         sc->ant_rx = rx_ant;
2195         sc->ant_tx = tx_ant;
2196
2197         if (ah->caps.rx_chainmask == 1)
2198                 return 0;
2199
2200         /* AR9100 runs into calibration issues if not all rx chains are enabled */
2201         if (AR_SREV_9100(ah))
2202                 ah->rxchainmask = 0x7;
2203         else
2204                 ah->rxchainmask = fill_chainmask(ah->caps.rx_chainmask, rx_ant);
2205
2206         ah->txchainmask = fill_chainmask(ah->caps.tx_chainmask, tx_ant);
2207         ath9k_cmn_reload_chainmask(ah);
2208
2209         return 0;
2210 }
2211
2212 static int ath9k_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant)
2213 {
2214         struct ath_softc *sc = hw->priv;
2215
2216         *tx_ant = sc->ant_tx;
2217         *rx_ant = sc->ant_rx;
2218         return 0;
2219 }
2220
2221 static void ath9k_sw_scan_start(struct ieee80211_hw *hw,
2222                                 struct ieee80211_vif *vif,
2223                                 const u8 *mac_addr)
2224 {
2225         struct ath_softc *sc = hw->priv;
2226         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2227         set_bit(ATH_OP_SCANNING, &common->op_flags);
2228 }
2229
2230 static void ath9k_sw_scan_complete(struct ieee80211_hw *hw,
2231                                    struct ieee80211_vif *vif)
2232 {
2233         struct ath_softc *sc = hw->priv;
2234         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2235         clear_bit(ATH_OP_SCANNING, &common->op_flags);
2236 }
2237
2238 #ifdef CONFIG_ATH9K_CHANNEL_CONTEXT
2239
2240 static void ath9k_cancel_pending_offchannel(struct ath_softc *sc)
2241 {
2242         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2243
2244         if (sc->offchannel.roc_vif) {
2245                 ath_dbg(common, CHAN_CTX,
2246                         "%s: Aborting RoC\n", __func__);
2247
2248                 del_timer_sync(&sc->offchannel.timer);
2249                 if (sc->offchannel.state >= ATH_OFFCHANNEL_ROC_START)
2250                         ath_roc_complete(sc, true);
2251         }
2252
2253         if (test_bit(ATH_OP_SCANNING, &common->op_flags)) {
2254                 ath_dbg(common, CHAN_CTX,
2255                         "%s: Aborting HW scan\n", __func__);
2256
2257                 del_timer_sync(&sc->offchannel.timer);
2258                 ath_scan_complete(sc, true);
2259         }
2260 }
2261
2262 static int ath9k_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2263                          struct ieee80211_scan_request *hw_req)
2264 {
2265         struct cfg80211_scan_request *req = &hw_req->req;
2266         struct ath_softc *sc = hw->priv;
2267         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2268         int ret = 0;
2269
2270         mutex_lock(&sc->mutex);
2271
2272         if (WARN_ON(sc->offchannel.scan_req)) {
2273                 ret = -EBUSY;
2274                 goto out;
2275         }
2276
2277         ath9k_ps_wakeup(sc);
2278         set_bit(ATH_OP_SCANNING, &common->op_flags);
2279         sc->offchannel.scan_vif = vif;
2280         sc->offchannel.scan_req = req;
2281         sc->offchannel.scan_idx = 0;
2282
2283         ath_dbg(common, CHAN_CTX, "HW scan request received on vif: %pM\n",
2284                 vif->addr);
2285
2286         if (sc->offchannel.state == ATH_OFFCHANNEL_IDLE) {
2287                 ath_dbg(common, CHAN_CTX, "Starting HW scan\n");
2288                 ath_offchannel_next(sc);
2289         }
2290
2291 out:
2292         mutex_unlock(&sc->mutex);
2293
2294         return ret;
2295 }
2296
2297 static void ath9k_cancel_hw_scan(struct ieee80211_hw *hw,
2298                                  struct ieee80211_vif *vif)
2299 {
2300         struct ath_softc *sc = hw->priv;
2301         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2302
2303         ath_dbg(common, CHAN_CTX, "Cancel HW scan on vif: %pM\n", vif->addr);
2304
2305         mutex_lock(&sc->mutex);
2306         del_timer_sync(&sc->offchannel.timer);
2307         ath_scan_complete(sc, true);
2308         mutex_unlock(&sc->mutex);
2309 }
2310
2311 static int ath9k_remain_on_channel(struct ieee80211_hw *hw,
2312                                    struct ieee80211_vif *vif,
2313                                    struct ieee80211_channel *chan, int duration,
2314                                    enum ieee80211_roc_type type)
2315 {
2316         struct ath_softc *sc = hw->priv;
2317         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2318         int ret = 0;
2319
2320         mutex_lock(&sc->mutex);
2321
2322         if (WARN_ON(sc->offchannel.roc_vif)) {
2323                 ret = -EBUSY;
2324                 goto out;
2325         }
2326
2327         ath9k_ps_wakeup(sc);
2328         sc->offchannel.roc_vif = vif;
2329         sc->offchannel.roc_chan = chan;
2330         sc->offchannel.roc_duration = duration;
2331
2332         ath_dbg(common, CHAN_CTX,
2333                 "RoC request on vif: %pM, type: %d duration: %d\n",
2334                 vif->addr, type, duration);
2335
2336         if (sc->offchannel.state == ATH_OFFCHANNEL_IDLE) {
2337                 ath_dbg(common, CHAN_CTX, "Starting RoC period\n");
2338                 ath_offchannel_next(sc);
2339         }
2340
2341 out:
2342         mutex_unlock(&sc->mutex);
2343
2344         return ret;
2345 }
2346
2347 static int ath9k_cancel_remain_on_channel(struct ieee80211_hw *hw)
2348 {
2349         struct ath_softc *sc = hw->priv;
2350         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2351
2352         mutex_lock(&sc->mutex);
2353
2354         ath_dbg(common, CHAN_CTX, "Cancel RoC\n");
2355         del_timer_sync(&sc->offchannel.timer);
2356
2357         if (sc->offchannel.roc_vif) {
2358                 if (sc->offchannel.state >= ATH_OFFCHANNEL_ROC_START)
2359                         ath_roc_complete(sc, true);
2360         }
2361
2362         mutex_unlock(&sc->mutex);
2363
2364         return 0;
2365 }
2366
2367 static int ath9k_add_chanctx(struct ieee80211_hw *hw,
2368                              struct ieee80211_chanctx_conf *conf)
2369 {
2370         struct ath_softc *sc = hw->priv;
2371         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2372         struct ath_chanctx *ctx, **ptr;
2373         int pos;
2374
2375         mutex_lock(&sc->mutex);
2376
2377         ath_for_each_chanctx(sc, ctx) {
2378                 if (ctx->assigned)
2379                         continue;
2380
2381                 ptr = (void *) conf->drv_priv;
2382                 *ptr = ctx;
2383                 ctx->assigned = true;
2384                 pos = ctx - &sc->chanctx[0];
2385                 ctx->hw_queue_base = pos * IEEE80211_NUM_ACS;
2386
2387                 ath_dbg(common, CHAN_CTX,
2388                         "Add channel context: %d MHz\n",
2389                         conf->def.chan->center_freq);
2390
2391                 ath_chanctx_set_channel(sc, ctx, &conf->def);
2392
2393                 mutex_unlock(&sc->mutex);
2394                 return 0;
2395         }
2396
2397         mutex_unlock(&sc->mutex);
2398         return -ENOSPC;
2399 }
2400
2401
2402 static void ath9k_remove_chanctx(struct ieee80211_hw *hw,
2403                                  struct ieee80211_chanctx_conf *conf)
2404 {
2405         struct ath_softc *sc = hw->priv;
2406         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2407         struct ath_chanctx *ctx = ath_chanctx_get(conf);
2408
2409         mutex_lock(&sc->mutex);
2410
2411         ath_dbg(common, CHAN_CTX,
2412                 "Remove channel context: %d MHz\n",
2413                 conf->def.chan->center_freq);
2414
2415         ctx->assigned = false;
2416         ctx->hw_queue_base = 0;
2417         ath_chanctx_event(sc, NULL, ATH_CHANCTX_EVENT_UNASSIGN);
2418
2419         mutex_unlock(&sc->mutex);
2420 }
2421
2422 static void ath9k_change_chanctx(struct ieee80211_hw *hw,
2423                                  struct ieee80211_chanctx_conf *conf,
2424                                  u32 changed)
2425 {
2426         struct ath_softc *sc = hw->priv;
2427         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2428         struct ath_chanctx *ctx = ath_chanctx_get(conf);
2429
2430         mutex_lock(&sc->mutex);
2431         ath_dbg(common, CHAN_CTX,
2432                 "Change channel context: %d MHz\n",
2433                 conf->def.chan->center_freq);
2434         ath_chanctx_set_channel(sc, ctx, &conf->def);
2435         mutex_unlock(&sc->mutex);
2436 }
2437
2438 static int ath9k_assign_vif_chanctx(struct ieee80211_hw *hw,
2439                                     struct ieee80211_vif *vif,
2440                                     struct ieee80211_chanctx_conf *conf)
2441 {
2442         struct ath_softc *sc = hw->priv;
2443         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2444         struct ath_vif *avp = (void *)vif->drv_priv;
2445         struct ath_chanctx *ctx = ath_chanctx_get(conf);
2446         int i;
2447
2448         ath9k_cancel_pending_offchannel(sc);
2449
2450         mutex_lock(&sc->mutex);
2451
2452         ath_dbg(common, CHAN_CTX,
2453                 "Assign VIF (addr: %pM, type: %d, p2p: %d) to channel context: %d MHz\n",
2454                 vif->addr, vif->type, vif->p2p,
2455                 conf->def.chan->center_freq);
2456
2457         avp->chanctx = ctx;
2458         ctx->nvifs_assigned++;
2459         list_add_tail(&avp->list, &ctx->vifs);
2460         ath9k_calculate_summary_state(sc, ctx);
2461         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2462                 vif->hw_queue[i] = ctx->hw_queue_base + i;
2463
2464         mutex_unlock(&sc->mutex);
2465
2466         return 0;
2467 }
2468
2469 static void ath9k_unassign_vif_chanctx(struct ieee80211_hw *hw,
2470                                        struct ieee80211_vif *vif,
2471                                        struct ieee80211_chanctx_conf *conf)
2472 {
2473         struct ath_softc *sc = hw->priv;
2474         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2475         struct ath_vif *avp = (void *)vif->drv_priv;
2476         struct ath_chanctx *ctx = ath_chanctx_get(conf);
2477         int ac;
2478
2479         ath9k_cancel_pending_offchannel(sc);
2480
2481         mutex_lock(&sc->mutex);
2482
2483         ath_dbg(common, CHAN_CTX,
2484                 "Remove VIF (addr: %pM, type: %d, p2p: %d) from channel context: %d MHz\n",
2485                 vif->addr, vif->type, vif->p2p,
2486                 conf->def.chan->center_freq);
2487
2488         avp->chanctx = NULL;
2489         ctx->nvifs_assigned--;
2490         list_del(&avp->list);
2491         ath9k_calculate_summary_state(sc, ctx);
2492         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2493                 vif->hw_queue[ac] = IEEE80211_INVAL_HW_QUEUE;
2494
2495         mutex_unlock(&sc->mutex);
2496 }
2497
2498 static void ath9k_mgd_prepare_tx(struct ieee80211_hw *hw,
2499                                  struct ieee80211_vif *vif)
2500 {
2501         struct ath_softc *sc = hw->priv;
2502         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2503         struct ath_vif *avp = (struct ath_vif *) vif->drv_priv;
2504         struct ath_beacon_config *cur_conf;
2505         struct ath_chanctx *go_ctx;
2506         unsigned long timeout;
2507         bool changed = false;
2508         u32 beacon_int;
2509
2510         if (!test_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags))
2511                 return;
2512
2513         if (!avp->chanctx)
2514                 return;
2515
2516         mutex_lock(&sc->mutex);
2517
2518         spin_lock_bh(&sc->chan_lock);
2519         if (sc->next_chan || (sc->cur_chan != avp->chanctx))
2520                 changed = true;
2521         spin_unlock_bh(&sc->chan_lock);
2522
2523         if (!changed)
2524                 goto out;
2525
2526         ath9k_cancel_pending_offchannel(sc);
2527
2528         go_ctx = ath_is_go_chanctx_present(sc);
2529
2530         if (go_ctx) {
2531                 /*
2532                  * Wait till the GO interface gets a chance
2533                  * to send out an NoA.
2534                  */
2535                 spin_lock_bh(&sc->chan_lock);
2536                 sc->sched.mgd_prepare_tx = true;
2537                 cur_conf = &go_ctx->beacon;
2538                 beacon_int = TU_TO_USEC(cur_conf->beacon_interval);
2539                 spin_unlock_bh(&sc->chan_lock);
2540
2541                 timeout = usecs_to_jiffies(beacon_int * 2);
2542                 init_completion(&sc->go_beacon);
2543
2544                 mutex_unlock(&sc->mutex);
2545
2546                 if (wait_for_completion_timeout(&sc->go_beacon,
2547                                                 timeout) == 0) {
2548                         ath_dbg(common, CHAN_CTX,
2549                                 "Failed to send new NoA\n");
2550
2551                         spin_lock_bh(&sc->chan_lock);
2552                         sc->sched.mgd_prepare_tx = false;
2553                         spin_unlock_bh(&sc->chan_lock);
2554                 }
2555
2556                 mutex_lock(&sc->mutex);
2557         }
2558
2559         ath_dbg(common, CHAN_CTX,
2560                 "%s: Set chanctx state to FORCE_ACTIVE for vif: %pM\n",
2561                 __func__, vif->addr);
2562
2563         spin_lock_bh(&sc->chan_lock);
2564         sc->next_chan = avp->chanctx;
2565         sc->sched.state = ATH_CHANCTX_STATE_FORCE_ACTIVE;
2566         spin_unlock_bh(&sc->chan_lock);
2567
2568         ath_chanctx_set_next(sc, true);
2569 out:
2570         mutex_unlock(&sc->mutex);
2571 }
2572
2573 void ath9k_fill_chanctx_ops(void)
2574 {
2575         if (!ath9k_is_chanctx_enabled())
2576                 return;
2577
2578         ath9k_ops.hw_scan                  = ath9k_hw_scan;
2579         ath9k_ops.cancel_hw_scan           = ath9k_cancel_hw_scan;
2580         ath9k_ops.remain_on_channel        = ath9k_remain_on_channel;
2581         ath9k_ops.cancel_remain_on_channel = ath9k_cancel_remain_on_channel;
2582         ath9k_ops.add_chanctx              = ath9k_add_chanctx;
2583         ath9k_ops.remove_chanctx           = ath9k_remove_chanctx;
2584         ath9k_ops.change_chanctx           = ath9k_change_chanctx;
2585         ath9k_ops.assign_vif_chanctx       = ath9k_assign_vif_chanctx;
2586         ath9k_ops.unassign_vif_chanctx     = ath9k_unassign_vif_chanctx;
2587         ath9k_ops.mgd_prepare_tx           = ath9k_mgd_prepare_tx;
2588 }
2589
2590 #endif
2591
2592 static int ath9k_get_txpower(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2593                              int *dbm)
2594 {
2595         struct ath_softc *sc = hw->priv;
2596         struct ath_vif *avp = (void *)vif->drv_priv;
2597
2598         mutex_lock(&sc->mutex);
2599         if (avp->chanctx)
2600                 *dbm = avp->chanctx->cur_txpower;
2601         else
2602                 *dbm = sc->cur_chan->cur_txpower;
2603         mutex_unlock(&sc->mutex);
2604
2605         *dbm /= 2;
2606
2607         return 0;
2608 }
2609
2610 struct ieee80211_ops ath9k_ops = {
2611         .tx                 = ath9k_tx,
2612         .start              = ath9k_start,
2613         .stop               = ath9k_stop,
2614         .add_interface      = ath9k_add_interface,
2615         .change_interface   = ath9k_change_interface,
2616         .remove_interface   = ath9k_remove_interface,
2617         .config             = ath9k_config,
2618         .configure_filter   = ath9k_configure_filter,
2619         .sta_state          = ath9k_sta_state,
2620         .sta_notify         = ath9k_sta_notify,
2621         .conf_tx            = ath9k_conf_tx,
2622         .bss_info_changed   = ath9k_bss_info_changed,
2623         .set_key            = ath9k_set_key,
2624         .get_tsf            = ath9k_get_tsf,
2625         .set_tsf            = ath9k_set_tsf,
2626         .reset_tsf          = ath9k_reset_tsf,
2627         .ampdu_action       = ath9k_ampdu_action,
2628         .get_survey         = ath9k_get_survey,
2629         .rfkill_poll        = ath9k_rfkill_poll_state,
2630         .set_coverage_class = ath9k_set_coverage_class,
2631         .flush              = ath9k_flush,
2632         .tx_frames_pending  = ath9k_tx_frames_pending,
2633         .tx_last_beacon     = ath9k_tx_last_beacon,
2634         .release_buffered_frames = ath9k_release_buffered_frames,
2635         .get_stats          = ath9k_get_stats,
2636         .set_antenna        = ath9k_set_antenna,
2637         .get_antenna        = ath9k_get_antenna,
2638
2639 #ifdef CONFIG_ATH9K_WOW
2640         .suspend            = ath9k_suspend,
2641         .resume             = ath9k_resume,
2642         .set_wakeup         = ath9k_set_wakeup,
2643 #endif
2644
2645 #ifdef CONFIG_ATH9K_DEBUGFS
2646         .get_et_sset_count  = ath9k_get_et_sset_count,
2647         .get_et_stats       = ath9k_get_et_stats,
2648         .get_et_strings     = ath9k_get_et_strings,
2649 #endif
2650
2651 #if defined(CONFIG_MAC80211_DEBUGFS) && defined(CONFIG_ATH9K_STATION_STATISTICS)
2652         .sta_add_debugfs    = ath9k_sta_add_debugfs,
2653 #endif
2654         .sw_scan_start      = ath9k_sw_scan_start,
2655         .sw_scan_complete   = ath9k_sw_scan_complete,
2656         .get_txpower        = ath9k_get_txpower,
2657 };