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 {
  59         bool pending = false;
  60
  61         spin_lock_bh(&txq->axq_lock);
  62
  63         if (txq->axq_depth) {
  64                 pending = true;
  65                 goto out;
  66         }
  67
  68         if (txq->mac80211_qnum >= 0) {
  69                 struct list_head *list;
  70
  71                 list = &sc->cur_chan->acq[txq->mac80211_qnum];
  72                 if (!list_empty(list))
  73                         pending = true;
  74         }
  75 out:
  76         spin_unlock_bh(&txq->axq_lock);
  77         return pending;
  78 }
  79
  80 static bool ath9k_setpower(struct ath_softc *sc, enum ath9k_power_mode mode)
  81 {
  82         unsigned long flags;
  83         bool ret;
  84
  85         spin_lock_irqsave(&sc->sc_pm_lock, flags);
  86         ret = ath9k_hw_setpower(sc->sc_ah, mode);
  87         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
  88
  89         return ret;
  90 }
  91
  92 void ath_ps_full_sleep(unsigned long data)
  93 {
  94         struct ath_softc *sc = (struct ath_softc *) data;
  95         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
  96         bool reset;
  97
  98         spin_lock(&common->cc_lock);
  99         ath_hw_cycle_counters_update(common);
 100         spin_unlock(&common->cc_lock);
 101
 102         ath9k_hw_setrxabort(sc->sc_ah, 1);
 103         ath9k_hw_stopdmarecv(sc->sc_ah, &reset);
 104
 105         ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_FULL_SLEEP);
 106 }
 107
 108 void ath9k_ps_wakeup(struct ath_softc *sc)
 109 {
 110         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 111         unsigned long flags;
 112         enum ath9k_power_mode power_mode;
 113
 114         spin_lock_irqsave(&sc->sc_pm_lock, flags);
 115         if (++sc->ps_usecount != 1)
 116                 goto unlock;
 117
 118         del_timer_sync(&sc->sleep_timer);
 119         power_mode = sc->sc_ah->power_mode;
 120         ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
 121
 122         /*
 123          * While the hardware is asleep, the cycle counters contain no
 124          * useful data. Better clear them now so that they don't mess up
 125          * survey data results.
 126          */
 127         if (power_mode != ATH9K_PM_AWAKE) {
 128                 spin_lock(&common->cc_lock);
 129                 ath_hw_cycle_counters_update(common);
 130                 memset(&common->cc_survey, 0, sizeof(common->cc_survey));
 131                 memset(&common->cc_ani, 0, sizeof(common->cc_ani));
 132                 spin_unlock(&common->cc_lock);
 133         }
 134
 135  unlock:
 136         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 137 }
 138
 139 void ath9k_ps_restore(struct ath_softc *sc)
 140 {
 141         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 142         enum ath9k_power_mode mode;
 143         unsigned long flags;
 144
 145         spin_lock_irqsave(&sc->sc_pm_lock, flags);
 146         if (--sc->ps_usecount != 0)
 147                 goto unlock;
 148
 149         if (sc->ps_idle) {
 150                 mod_timer(&sc->sleep_timer, jiffies + HZ / 10);
 151                 goto unlock;
 152         }
 153
 154         if (sc->ps_enabled &&
 155                    !(sc->ps_flags & (PS_WAIT_FOR_BEACON |
 156                                      PS_WAIT_FOR_CAB |
 157                                      PS_WAIT_FOR_PSPOLL_DATA |
 158                                      PS_WAIT_FOR_TX_ACK |
 159                                      PS_WAIT_FOR_ANI))) {
 160                 mode = ATH9K_PM_NETWORK_SLEEP;
 161                 if (ath9k_hw_btcoex_is_enabled(sc->sc_ah))
 162                         ath9k_btcoex_stop_gen_timer(sc);
 163         } else {
 164                 goto unlock;
 165         }
 166
 167         spin_lock(&common->cc_lock);
 168         ath_hw_cycle_counters_update(common);
 169         spin_unlock(&common->cc_lock);
 170
 171         ath9k_hw_setpower(sc->sc_ah, mode);
 172
 173  unlock:
 174         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 175 }
 176
 177 static void __ath_cancel_work(struct ath_softc *sc)
 178 {
 179         cancel_work_sync(&sc->paprd_work);
 180         cancel_delayed_work_sync(&sc->tx_complete_work);
 181         cancel_delayed_work_sync(&sc->hw_pll_work);
 182
 183 #ifdef CONFIG_ATH9K_BTCOEX_SUPPORT
 184         if (ath9k_hw_mci_is_enabled(sc->sc_ah))
 185                 cancel_work_sync(&sc->mci_work);
 186 #endif
 187 }
 188
 189 void ath_cancel_work(struct ath_softc *sc)
 190 {
 191         __ath_cancel_work(sc);
 192         cancel_work_sync(&sc->hw_reset_work);
 193 }
 194
 195 void ath_restart_work(struct ath_softc *sc)
 196 {
 197         ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
 198
 199         if (AR_SREV_9340(sc->sc_ah) || AR_SREV_9330(sc->sc_ah))
 200                 ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work,
 201                                      msecs_to_jiffies(ATH_PLL_WORK_INTERVAL));
 202
 203         ath_start_ani(sc);
 204 }
 205
 206 static bool ath_prepare_reset(struct ath_softc *sc)
 207 {
 208         struct ath_hw *ah = sc->sc_ah;
 209         bool ret = true;
 210
 211         ieee80211_stop_queues(sc->hw);
 212         ath_stop_ani(sc);
 213         ath9k_hw_disable_interrupts(ah);
 214
 215         if (!ath_drain_all_txq(sc))
 216                 ret = false;
 217
 218         if (!ath_stoprecv(sc))
 219                 ret = false;
 220
 221         return ret;
 222 }
 223
 224 static bool ath_complete_reset(struct ath_softc *sc, bool start)
 225 {
 226         struct ath_hw *ah = sc->sc_ah;
 227         struct ath_common *common = ath9k_hw_common(ah);
 228         unsigned long flags;
 229
 230         ath9k_calculate_summary_state(sc, sc->cur_chan);
 231         ath_startrecv(sc);
 232         ath9k_cmn_update_txpow(ah, sc->curtxpow,
 233                                sc->cur_chan->txpower, &sc->curtxpow);
 234         clear_bit(ATH_OP_HW_RESET, &common->op_flags);
 235
 236         if (!sc->cur_chan->offchannel && start) {
 237                 /* restore per chanctx TSF timer */
 238                 if (sc->cur_chan->tsf_val) {
 239                         u32 offset;
 240
 241                         offset = ath9k_hw_get_tsf_offset(&sc->cur_chan->tsf_ts,
 242                                                          NULL);
 243                         ath9k_hw_settsf64(ah, sc->cur_chan->tsf_val + offset);
 244                 }
 245
 246
 247                 if (!test_bit(ATH_OP_BEACONS, &common->op_flags))
 248                         goto work;
 249
 250                 if (ah->opmode == NL80211_IFTYPE_STATION &&
 251                     test_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags)) {
 252                         spin_lock_irqsave(&sc->sc_pm_lock, flags);
 253                         sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
 254                         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 255                 } else {
 256                         ath9k_set_beacon(sc);
 257                 }
 258         work:
 259                 ath_restart_work(sc);
 260                 ath_txq_schedule_all(sc);
 261         }
 262
 263         sc->gtt_cnt = 0;
 264
 265         ath9k_hw_set_interrupts(ah);
 266         ath9k_hw_enable_interrupts(ah);
 267         ieee80211_wake_queues(sc->hw);
 268         ath9k_p2p_ps_timer(sc);
 269
 270         return true;
 271 }
 272
 273 int ath_reset_internal(struct ath_softc *sc, struct ath9k_channel *hchan)
 274 {
 275         struct ath_hw *ah = sc->sc_ah;
 276         struct ath_common *common = ath9k_hw_common(ah);
 277         struct ath9k_hw_cal_data *caldata = NULL;
 278         bool fastcc = true;
 279         int r;
 280
 281         __ath_cancel_work(sc);
 282
 283         tasklet_disable(&sc->intr_tq);
 284         spin_lock_bh(&sc->sc_pcu_lock);
 285
 286         if (!sc->cur_chan->offchannel) {
 287                 fastcc = false;
 288                 caldata = &sc->cur_chan->caldata;
 289         }
 290
 291         if (!hchan) {
 292                 fastcc = false;
 293                 hchan = ah->curchan;
 294         }
 295
 296         if (!ath_prepare_reset(sc))
 297                 fastcc = false;
 298
 299         if (ath9k_is_chanctx_enabled())
 300                 fastcc = false;
 301
 302         spin_lock_bh(&sc->chan_lock);
 303         sc->cur_chandef = sc->cur_chan->chandef;
 304         spin_unlock_bh(&sc->chan_lock);
 305
 306         ath_dbg(common, CONFIG, "Reset to %u MHz, HT40: %d fastcc: %d\n",
 307                 hchan->channel, IS_CHAN_HT40(hchan), fastcc);
 308
 309         r = ath9k_hw_reset(ah, hchan, caldata, fastcc);
 310         if (r) {
 311                 ath_err(common,
 312                         "Unable to reset channel, reset status %d\n", r);
 313
 314                 ath9k_hw_enable_interrupts(ah);
 315                 ath9k_queue_reset(sc, RESET_TYPE_BB_HANG);
 316
 317                 goto out;
 318         }
 319
 320         if (ath9k_hw_mci_is_enabled(sc->sc_ah) &&
 321             sc->cur_chan->offchannel)
 322                 ath9k_mci_set_txpower(sc, true, false);
 323
 324         if (!ath_complete_reset(sc, true))
 325                 r = -EIO;
 326
 327 out:
 328         spin_unlock_bh(&sc->sc_pcu_lock);
 329         tasklet_enable(&sc->intr_tq);
 330
 331         return r;
 332 }
 333
 334 static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta,
 335                             struct ieee80211_vif *vif)
 336 {
 337         struct ath_node *an;
 338         an = (struct ath_node *)sta->drv_priv;
 339
 340         an->sc = sc;
 341         an->sta = sta;
 342         an->vif = vif;
 343         memset(&an->key_idx, 0, sizeof(an->key_idx));
 344
 345         ath_tx_node_init(sc, an);
 346
 347         ath_dynack_node_init(sc->sc_ah, an);
 348 }
 349
 350 static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
 351 {
 352         struct ath_node *an = (struct ath_node *)sta->drv_priv;
 353         ath_tx_node_cleanup(sc, an);
 354
 355         ath_dynack_node_deinit(sc->sc_ah, an);
 356 }
 357
 358 void ath9k_tasklet(unsigned long data)
 359 {
 360         struct ath_softc *sc = (struct ath_softc *)data;
 361         struct ath_hw *ah = sc->sc_ah;
 362         struct ath_common *common = ath9k_hw_common(ah);
 363         enum ath_reset_type type;
 364         unsigned long flags;
 365         u32 status = sc->intrstatus;
 366         u32 rxmask;
 367
 368         ath9k_ps_wakeup(sc);
 369         spin_lock(&sc->sc_pcu_lock);
 370
 371         if (status & ATH9K_INT_FATAL) {
 372                 type = RESET_TYPE_FATAL_INT;
 373                 ath9k_queue_reset(sc, type);
 374
 375                 /*
 376                  * Increment the ref. counter here so that
 377                  * interrupts are enabled in the reset routine.
 378                  */
 379                 atomic_inc(&ah->intr_ref_cnt);
 380                 ath_dbg(common, RESET, "FATAL: Skipping interrupts\n");
 381                 goto out;
 382         }
 383
 384         if ((ah->config.hw_hang_checks & HW_BB_WATCHDOG) &&
 385             (status & ATH9K_INT_BB_WATCHDOG)) {
 386                 spin_lock(&common->cc_lock);
 387                 ath_hw_cycle_counters_update(common);
 388                 ar9003_hw_bb_watchdog_dbg_info(ah);
 389                 spin_unlock(&common->cc_lock);
 390
 391                 if (ar9003_hw_bb_watchdog_check(ah)) {
 392                         type = RESET_TYPE_BB_WATCHDOG;
 393                         ath9k_queue_reset(sc, type);
 394
 395                         /*
 396                          * Increment the ref. counter here so that
 397                          * interrupts are enabled in the reset routine.
 398                          */
 399                         atomic_inc(&ah->intr_ref_cnt);
 400                         ath_dbg(common, RESET,
 401                                 "BB_WATCHDOG: Skipping interrupts\n");
 402                         goto out;
 403                 }
 404         }
 405
 406         if (status & ATH9K_INT_GTT) {
 407                 sc->gtt_cnt++;
 408
 409                 if ((sc->gtt_cnt >= MAX_GTT_CNT) && !ath9k_hw_check_alive(ah)) {
 410                         type = RESET_TYPE_TX_GTT;
 411                         ath9k_queue_reset(sc, type);
 412                         atomic_inc(&ah->intr_ref_cnt);
 413                         ath_dbg(common, RESET,
 414                                 "GTT: Skipping interrupts\n");
 415                         goto out;
 416                 }
 417         }
 418
 419         spin_lock_irqsave(&sc->sc_pm_lock, flags);
 420         if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) {
 421                 /*
 422                  * TSF sync does not look correct; remain awake to sync with
 423                  * the next Beacon.
 424                  */
 425                 ath_dbg(common, PS, "TSFOOR - Sync with next Beacon\n");
 426                 sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC;
 427         }
 428         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 429
 430         if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
 431                 rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL |
 432                           ATH9K_INT_RXORN);
 433         else
 434                 rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
 435
 436         if (status & rxmask) {
 437                 /* Check for high priority Rx first */
 438                 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
 439                     (status & ATH9K_INT_RXHP))
 440                         ath_rx_tasklet(sc, 0, true);
 441
 442                 ath_rx_tasklet(sc, 0, false);
 443         }
 444
 445         if (status & ATH9K_INT_TX) {
 446                 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
 447                         /*
 448                          * For EDMA chips, TX completion is enabled for the
 449                          * beacon queue, so if a beacon has been transmitted
 450                          * successfully after a GTT interrupt, the GTT counter
 451                          * gets reset to zero here.
 452                          */
 453                         sc->gtt_cnt = 0;
 454
 455                         ath_tx_edma_tasklet(sc);
 456                 } else {
 457                         ath_tx_tasklet(sc);
 458                 }
 459
 460                 wake_up(&sc->tx_wait);
 461         }
 462
 463         if (status & ATH9K_INT_GENTIMER)
 464                 ath_gen_timer_isr(sc->sc_ah);
 465
 466         ath9k_btcoex_handle_interrupt(sc, status);
 467
 468         /* re-enable hardware interrupt */
 469         ath9k_hw_enable_interrupts(ah);
 470 out:
 471         spin_unlock(&sc->sc_pcu_lock);
 472         ath9k_ps_restore(sc);
 473 }
 474
 475 irqreturn_t ath_isr(int irq, void *dev)
 476 {
 477 #define SCHED_INTR (                            \
 478                 ATH9K_INT_FATAL |               \
 479                 ATH9K_INT_BB_WATCHDOG |         \
 480                 ATH9K_INT_RXORN |               \
 481                 ATH9K_INT_RXEOL |               \
 482                 ATH9K_INT_RX |                  \
 483                 ATH9K_INT_RXLP |                \
 484                 ATH9K_INT_RXHP |                \
 485                 ATH9K_INT_TX |                  \
 486                 ATH9K_INT_BMISS |               \
 487                 ATH9K_INT_CST |                 \
 488                 ATH9K_INT_GTT |                 \
 489                 ATH9K_INT_TSFOOR |              \
 490                 ATH9K_INT_GENTIMER |            \
 491                 ATH9K_INT_MCI)
 492
 493         struct ath_softc *sc = dev;
 494         struct ath_hw *ah = sc->sc_ah;
 495         struct ath_common *common = ath9k_hw_common(ah);
 496         enum ath9k_int status;
 497         u32 sync_cause = 0;
 498         bool sched = false;
 499
 500         /*
 501          * The hardware is not ready/present, don't
 502          * touch anything. Note this can happen early
 503          * on if the IRQ is shared.
 504          */
 505         if (!ah || test_bit(ATH_OP_INVALID, &common->op_flags))
 506                 return IRQ_NONE;
 507
 508         /* shared irq, not for us */
 509
 510         if (!ath9k_hw_intrpend(ah))
 511                 return IRQ_NONE;
 512
 513         if (test_bit(ATH_OP_HW_RESET, &common->op_flags)) {
 514                 ath9k_hw_kill_interrupts(ah);
 515                 return IRQ_HANDLED;
 516         }
 517
 518         /*
 519          * Figure out the reason(s) for the interrupt.  Note
 520          * that the hal returns a pseudo-ISR that may include
 521          * bits we haven't explicitly enabled so we mask the
 522          * value to insure we only process bits we requested.
 523          */
 524         ath9k_hw_getisr(ah, &status, &sync_cause); /* NB: clears ISR too */
 525         ath9k_debug_sync_cause(sc, sync_cause);
 526         status &= ah->imask;    /* discard unasked-for bits */
 527
 528         /*
 529          * If there are no status bits set, then this interrupt was not
 530          * for me (should have been caught above).
 531          */
 532         if (!status)
 533                 return IRQ_NONE;
 534
 535         /* Cache the status */
 536         sc->intrstatus = status;
 537
 538         if (status & SCHED_INTR)
 539                 sched = true;
 540
 541         /*
 542          * If a FATAL or RXORN interrupt is received, we have to reset the
 543          * chip immediately.
 544          */
 545         if ((status & ATH9K_INT_FATAL) || ((status & ATH9K_INT_RXORN) &&
 546             !(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)))
 547                 goto chip_reset;
 548
 549         if ((ah->config.hw_hang_checks & HW_BB_WATCHDOG) &&
 550             (status & ATH9K_INT_BB_WATCHDOG))
 551                 goto chip_reset;
 552
 553 #ifdef CONFIG_ATH9K_WOW
 554         if (status & ATH9K_INT_BMISS) {
 555                 if (atomic_read(&sc->wow_sleep_proc_intr) == 0) {
 556                         atomic_inc(&sc->wow_got_bmiss_intr);
 557                         atomic_dec(&sc->wow_sleep_proc_intr);
 558                 }
 559         }
 560 #endif
 561
 562         if (status & ATH9K_INT_SWBA)
 563                 tasklet_schedule(&sc->bcon_tasklet);
 564
 565         if (status & ATH9K_INT_TXURN)
 566                 ath9k_hw_updatetxtriglevel(ah, true);
 567
 568         if (status & ATH9K_INT_RXEOL) {
 569                 ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
 570                 ath9k_hw_set_interrupts(ah);
 571         }
 572
 573         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
 574                 if (status & ATH9K_INT_TIM_TIMER) {
 575                         if (ATH_DBG_WARN_ON_ONCE(sc->ps_idle))
 576                                 goto chip_reset;
 577                         /* Clear RxAbort bit so that we can
 578                          * receive frames */
 579                         ath9k_setpower(sc, ATH9K_PM_AWAKE);
 580                         spin_lock(&sc->sc_pm_lock);
 581                         ath9k_hw_setrxabort(sc->sc_ah, 0);
 582                         sc->ps_flags |= PS_WAIT_FOR_BEACON;
 583                         spin_unlock(&sc->sc_pm_lock);
 584                 }
 585
 586 chip_reset:
 587
 588         ath_debug_stat_interrupt(sc, status);
 589
 590         if (sched) {
 591                 /* turn off every interrupt */
 592                 ath9k_hw_disable_interrupts(ah);
 593                 tasklet_schedule(&sc->intr_tq);
 594         }
 595
 596         return IRQ_HANDLED;
 597
 598 #undef SCHED_INTR
 599 }
 600
 601 int ath_reset(struct ath_softc *sc)
 602 {
 603         int r;
 604
 605         ath9k_ps_wakeup(sc);
 606         r = ath_reset_internal(sc, NULL);
 607         ath9k_ps_restore(sc);
 608
 609         return r;
 610 }
 611
 612 void ath9k_queue_reset(struct ath_softc *sc, enum ath_reset_type type)
 613 {
 614         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 615 #ifdef CONFIG_ATH9K_DEBUGFS
 616         RESET_STAT_INC(sc, type);
 617 #endif
 618         set_bit(ATH_OP_HW_RESET, &common->op_flags);
 619         ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
 620 }
 621
 622 void ath_reset_work(struct work_struct *work)
 623 {
 624         struct ath_softc *sc = container_of(work, struct ath_softc, hw_reset_work);
 625
 626         ath_reset(sc);
 627 }
 628
 629 /**********************/
 630 /* mac80211 callbacks */
 631 /**********************/
 632
 633 static int ath9k_start(struct ieee80211_hw *hw)
 634 {
 635         struct ath_softc *sc = hw->priv;
 636         struct ath_hw *ah = sc->sc_ah;
 637         struct ath_common *common = ath9k_hw_common(ah);
 638         struct ieee80211_channel *curchan = sc->cur_chan->chandef.chan;
 639         struct ath_chanctx *ctx = sc->cur_chan;
 640         struct ath9k_channel *init_channel;
 641         int r;
 642
 643         ath_dbg(common, CONFIG,
 644                 "Starting driver with initial channel: %d MHz\n",
 645                 curchan->center_freq);
 646
 647         ath9k_ps_wakeup(sc);
 648         mutex_lock(&sc->mutex);
 649
 650         init_channel = ath9k_cmn_get_channel(hw, ah, &ctx->chandef);
 651         sc->cur_chandef = hw->conf.chandef;
 652
 653         /* Reset SERDES registers */
 654         ath9k_hw_configpcipowersave(ah, false);
 655
 656         /*
 657          * The basic interface to setting the hardware in a good
 658          * state is ``reset''.  On return the hardware is known to
 659          * be powered up and with interrupts disabled.  This must
 660          * be followed by initialization of the appropriate bits
 661          * and then setup of the interrupt mask.
 662          */
 663         spin_lock_bh(&sc->sc_pcu_lock);
 664
 665         atomic_set(&ah->intr_ref_cnt, -1);
 666
 667         r = ath9k_hw_reset(ah, init_channel, ah->caldata, false);
 668         if (r) {
 669                 ath_err(common,
 670                         "Unable to reset hardware; reset status %d (freq %u MHz)\n",
 671                         r, curchan->center_freq);
 672                 ah->reset_power_on = false;
 673         }
 674
 675         /* Setup our intr mask. */
 676         ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL |
 677                     ATH9K_INT_RXORN | ATH9K_INT_FATAL |
 678                     ATH9K_INT_GLOBAL;
 679
 680         if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
 681                 ah->imask |= ATH9K_INT_RXHP |
 682                              ATH9K_INT_RXLP;
 683         else
 684                 ah->imask |= ATH9K_INT_RX;
 685
 686         if (ah->config.hw_hang_checks & HW_BB_WATCHDOG)
 687                 ah->imask |= ATH9K_INT_BB_WATCHDOG;
 688
 689         /*
 690          * Enable GTT interrupts only for AR9003/AR9004 chips
 691          * for now.
 692          */
 693         if (AR_SREV_9300_20_OR_LATER(ah))
 694                 ah->imask |= ATH9K_INT_GTT;
 695
 696         if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
 697                 ah->imask |= ATH9K_INT_CST;
 698
 699         ath_mci_enable(sc);
 700
 701         clear_bit(ATH_OP_INVALID, &common->op_flags);
 702         sc->sc_ah->is_monitoring = false;
 703
 704         if (!ath_complete_reset(sc, false))
 705                 ah->reset_power_on = false;
 706
 707         if (ah->led_pin >= 0) {
 708                 ath9k_hw_cfg_output(ah, ah->led_pin,
 709                                     AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
 710                 ath9k_hw_set_gpio(ah, ah->led_pin, 0);
 711         }
 712
 713         /*
 714          * Reset key cache to sane defaults (all entries cleared) instead of
 715          * semi-random values after suspend/resume.
 716          */
 717         ath9k_cmn_init_crypto(sc->sc_ah);
 718
 719         ath9k_hw_reset_tsf(ah);
 720
 721         spin_unlock_bh(&sc->sc_pcu_lock);
 722
 723         mutex_unlock(&sc->mutex);
 724
 725         ath9k_ps_restore(sc);
 726
 727         return 0;
 728 }
 729
 730 static void ath9k_tx(struct ieee80211_hw *hw,
 731                      struct ieee80211_tx_control *control,
 732                      struct sk_buff *skb)
 733 {
 734         struct ath_softc *sc = hw->priv;
 735         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 736         struct ath_tx_control txctl;
 737         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 738         unsigned long flags;
 739
 740         if (sc->ps_enabled) {
 741                 /*
 742                  * mac80211 does not set PM field for normal data frames, so we
 743                  * need to update that based on the current PS mode.
 744                  */
 745                 if (ieee80211_is_data(hdr->frame_control) &&
 746                     !ieee80211_is_nullfunc(hdr->frame_control) &&
 747                     !ieee80211_has_pm(hdr->frame_control)) {
 748                         ath_dbg(common, PS,
 749                                 "Add PM=1 for a TX frame while in PS mode\n");
 750                         hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 751                 }
 752         }
 753
 754         if (unlikely(sc->sc_ah->power_mode == ATH9K_PM_NETWORK_SLEEP)) {
 755                 /*
 756                  * We are using PS-Poll and mac80211 can request TX while in
 757                  * power save mode. Need to wake up hardware for the TX to be
 758                  * completed and if needed, also for RX of buffered frames.
 759                  */
 760                 ath9k_ps_wakeup(sc);
 761                 spin_lock_irqsave(&sc->sc_pm_lock, flags);
 762                 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
 763                         ath9k_hw_setrxabort(sc->sc_ah, 0);
 764                 if (ieee80211_is_pspoll(hdr->frame_control)) {
 765                         ath_dbg(common, PS,
 766                                 "Sending PS-Poll to pick a buffered frame\n");
 767                         sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA;
 768                 } else {
 769                         ath_dbg(common, PS, "Wake up to complete TX\n");
 770                         sc->ps_flags |= PS_WAIT_FOR_TX_ACK;
 771                 }
 772                 /*
 773                  * The actual restore operation will happen only after
 774                  * the ps_flags bit is cleared. We are just dropping
 775                  * the ps_usecount here.
 776                  */
 777                 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 778                 ath9k_ps_restore(sc);
 779         }
 780
 781         /*
 782          * Cannot tx while the hardware is in full sleep, it first needs a full
 783          * chip reset to recover from that
 784          */
 785         if (unlikely(sc->sc_ah->power_mode == ATH9K_PM_FULL_SLEEP)) {
 786                 ath_err(common, "TX while HW is in FULL_SLEEP mode\n");
 787                 goto exit;
 788         }
 789
 790         memset(&txctl, 0, sizeof(struct ath_tx_control));
 791         txctl.txq = sc->tx.txq_map[skb_get_queue_mapping(skb)];
 792         txctl.sta = control->sta;
 793
 794         ath_dbg(common, XMIT, "transmitting packet, skb: %p\n", skb);
 795
 796         if (ath_tx_start(hw, skb, &txctl) != 0) {
 797                 ath_dbg(common, XMIT, "TX failed\n");
 798                 TX_STAT_INC(txctl.txq->axq_qnum, txfailed);
 799                 goto exit;
 800         }
 801
 802         return;
 803 exit:
 804         ieee80211_free_txskb(hw, skb);
 805 }
 806
 807 static void ath9k_stop(struct ieee80211_hw *hw)
 808 {
 809         struct ath_softc *sc = hw->priv;
 810         struct ath_hw *ah = sc->sc_ah;
 811         struct ath_common *common = ath9k_hw_common(ah);
 812         bool prev_idle;
 813
 814         ath9k_deinit_channel_context(sc);
 815
 816         mutex_lock(&sc->mutex);
 817
 818         ath_cancel_work(sc);
 819
 820         if (test_bit(ATH_OP_INVALID, &common->op_flags)) {
 821                 ath_dbg(common, ANY, "Device not present\n");
 822                 mutex_unlock(&sc->mutex);
 823                 return;
 824         }
 825
 826         /* Ensure HW is awake when we try to shut it down. */
 827         ath9k_ps_wakeup(sc);
 828
 829         spin_lock_bh(&sc->sc_pcu_lock);
 830
 831         /* prevent tasklets to enable interrupts once we disable them */
 832         ah->imask &= ~ATH9K_INT_GLOBAL;
 833
 834         /* make sure h/w will not generate any interrupt
 835          * before setting the invalid flag. */
 836         ath9k_hw_disable_interrupts(ah);
 837
 838         spin_unlock_bh(&sc->sc_pcu_lock);
 839
 840         /* we can now sync irq and kill any running tasklets, since we already
 841          * disabled interrupts and not holding a spin lock */
 842         synchronize_irq(sc->irq);
 843         tasklet_kill(&sc->intr_tq);
 844         tasklet_kill(&sc->bcon_tasklet);
 845
 846         prev_idle = sc->ps_idle;
 847         sc->ps_idle = true;
 848
 849         spin_lock_bh(&sc->sc_pcu_lock);
 850
 851         if (ah->led_pin >= 0) {
 852                 ath9k_hw_set_gpio(ah, ah->led_pin, 1);
 853                 ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
 854         }
 855
 856         ath_prepare_reset(sc);
 857
 858         if (sc->rx.frag) {
 859                 dev_kfree_skb_any(sc->rx.frag);
 860                 sc->rx.frag = NULL;
 861         }
 862
 863         if (!ah->curchan)
 864                 ah->curchan = ath9k_cmn_get_channel(hw, ah,
 865                                                     &sc->cur_chan->chandef);
 866
 867         ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
 868         ath9k_hw_phy_disable(ah);
 869
 870         ath9k_hw_configpcipowersave(ah, true);
 871
 872         spin_unlock_bh(&sc->sc_pcu_lock);
 873
 874         ath9k_ps_restore(sc);
 875
 876         set_bit(ATH_OP_INVALID, &common->op_flags);
 877         sc->ps_idle = prev_idle;
 878
 879         mutex_unlock(&sc->mutex);
 880
 881         ath_dbg(common, CONFIG, "Driver halt\n");
 882 }
 883
 884 static bool ath9k_uses_beacons(int type)
 885 {
 886         switch (type) {
 887         case NL80211_IFTYPE_AP:
 888         case NL80211_IFTYPE_ADHOC:
 889         case NL80211_IFTYPE_MESH_POINT:
 890                 return true;
 891         default:
 892                 return false;
 893         }
 894 }
 895
 896 static void ath9k_vif_iter(struct ath9k_vif_iter_data *iter_data,
 897                            u8 *mac, struct ieee80211_vif *vif)
 898 {
 899         struct ath_vif *avp = (struct ath_vif *)vif->drv_priv;
 900         int i;
 901
 902         if (iter_data->has_hw_macaddr) {
 903                 for (i = 0; i < ETH_ALEN; i++)
 904                         iter_data->mask[i] &=
 905                                 ~(iter_data->hw_macaddr[i] ^ mac[i]);
 906         } else {
 907                 memcpy(iter_data->hw_macaddr, mac, ETH_ALEN);
 908                 iter_data->has_hw_macaddr = true;
 909         }
 910
 911         if (!vif->bss_conf.use_short_slot)
 912                 iter_data->slottime = ATH9K_SLOT_TIME_20;
 913
 914         switch (vif->type) {
 915         case NL80211_IFTYPE_AP:
 916                 iter_data->naps++;
 917                 break;
 918         case NL80211_IFTYPE_STATION:
 919                 iter_data->nstations++;
 920                 if (avp->assoc && !iter_data->primary_sta)
 921                         iter_data->primary_sta = vif;
 922                 break;
 923         case NL80211_IFTYPE_ADHOC:
 924                 iter_data->nadhocs++;
 925                 if (vif->bss_conf.enable_beacon)
 926                         iter_data->beacons = true;
 927                 break;
 928         case NL80211_IFTYPE_MESH_POINT:
 929                 iter_data->nmeshes++;
 930                 if (vif->bss_conf.enable_beacon)
 931                         iter_data->beacons = true;
 932                 break;
 933         case NL80211_IFTYPE_WDS:
 934                 iter_data->nwds++;
 935                 break;
 936         default:
 937                 break;
 938         }
 939 }
 940
 941 static void ath9k_update_bssid_mask(struct ath_softc *sc,
 942                                     struct ath_chanctx *ctx,
 943                                     struct ath9k_vif_iter_data *iter_data)
 944 {
 945         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 946         struct ath_vif *avp;
 947         int i;
 948
 949         if (!ath9k_is_chanctx_enabled())
 950                 return;
 951
 952         list_for_each_entry(avp, &ctx->vifs, list) {
 953                 if (ctx->nvifs_assigned != 1)
 954                         continue;
 955
 956                 if (!avp->vif->p2p || !iter_data->has_hw_macaddr)
 957                         continue;
 958
 959                 ether_addr_copy(common->curbssid, avp->bssid);
 960
 961                 /* perm_addr will be used as the p2p device address. */
 962                 for (i = 0; i < ETH_ALEN; i++)
 963                         iter_data->mask[i] &=
 964                                 ~(iter_data->hw_macaddr[i] ^
 965                                   sc->hw->wiphy->perm_addr[i]);
 966         }
 967 }
 968
 969 /* Called with sc->mutex held. */
 970 void ath9k_calculate_iter_data(struct ath_softc *sc,
 971                                struct ath_chanctx *ctx,
 972                                struct ath9k_vif_iter_data *iter_data)
 973 {
 974         struct ath_vif *avp;
 975
 976         /*
 977          * Pick the MAC address of the first interface as the new hardware
 978          * MAC address. The hardware will use it together with the BSSID mask
 979          * when matching addresses.
 980          */
 981         memset(iter_data, 0, sizeof(*iter_data));
 982         memset(&iter_data->mask, 0xff, ETH_ALEN);
 983         iter_data->slottime = ATH9K_SLOT_TIME_9;
 984
 985         list_for_each_entry(avp, &ctx->vifs, list)
 986                 ath9k_vif_iter(iter_data, avp->vif->addr, avp->vif);
 987
 988         ath9k_update_bssid_mask(sc, ctx, iter_data);
 989 }
 990
 991 static void ath9k_set_assoc_state(struct ath_softc *sc,
 992                                   struct ieee80211_vif *vif, bool changed)
 993 {
 994         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 995         struct ath_vif *avp = (struct ath_vif *)vif->drv_priv;
 996         unsigned long flags;
 997
 998         set_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags);
 999
1000         ether_addr_copy(common->curbssid, avp->bssid);
1001         common->curaid = avp->aid;
1002         ath9k_hw_write_associd(sc->sc_ah);
1003
1004         if (changed) {
1005                 common->last_rssi = ATH_RSSI_DUMMY_MARKER;
1006                 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
1007
1008                 spin_lock_irqsave(&sc->sc_pm_lock, flags);
1009                 sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
1010                 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1011         }
1012
1013         if (ath9k_hw_mci_is_enabled(sc->sc_ah))
1014                 ath9k_mci_update_wlan_channels(sc, false);
1015
1016         ath_dbg(common, CONFIG,
1017                 "Primary Station interface: %pM, BSSID: %pM\n",
1018                 vif->addr, common->curbssid);
1019 }
1020
1021 #ifdef CONFIG_ATH9K_CHANNEL_CONTEXT
1022 static void ath9k_set_offchannel_state(struct ath_softc *sc)
1023 {
1024         struct ath_hw *ah = sc->sc_ah;
1025         struct ath_common *common = ath9k_hw_common(ah);
1026         struct ieee80211_vif *vif = NULL;
1027
1028         ath9k_ps_wakeup(sc);
1029
1030         if (sc->offchannel.state < ATH_OFFCHANNEL_ROC_START)
1031                 vif = sc->offchannel.scan_vif;
1032         else
1033                 vif = sc->offchannel.roc_vif;
1034
1035         if (WARN_ON(!vif))
1036                 goto exit;
1037
1038         eth_zero_addr(common->curbssid);
1039         eth_broadcast_addr(common->bssidmask);
1040         ether_addr_copy(common->macaddr, vif->addr);
1041         common->curaid = 0;
1042         ah->opmode = vif->type;
1043         ah->imask &= ~ATH9K_INT_SWBA;
1044         ah->imask &= ~ATH9K_INT_TSFOOR;
1045         ah->slottime = ATH9K_SLOT_TIME_9;
1046
1047         ath_hw_setbssidmask(common);
1048         ath9k_hw_setopmode(ah);
1049         ath9k_hw_write_associd(sc->sc_ah);
1050         ath9k_hw_set_interrupts(ah);
1051         ath9k_hw_init_global_settings(ah);
1052
1053 exit:
1054         ath9k_ps_restore(sc);
1055 }
1056 #endif
1057
1058 /* Called with sc->mutex held. */
1059 void ath9k_calculate_summary_state(struct ath_softc *sc,
1060                                    struct ath_chanctx *ctx)
1061 {
1062         struct ath_hw *ah = sc->sc_ah;
1063         struct ath_common *common = ath9k_hw_common(ah);
1064         struct ath9k_vif_iter_data iter_data;
1065         struct ath_beacon_config *cur_conf;
1066
1067         ath_chanctx_check_active(sc, ctx);
1068
1069         if (ctx != sc->cur_chan)
1070                 return;
1071
1072 #ifdef CONFIG_ATH9K_CHANNEL_CONTEXT
1073         if (ctx == &sc->offchannel.chan)
1074                 return ath9k_set_offchannel_state(sc);
1075 #endif
1076
1077         ath9k_ps_wakeup(sc);
1078         ath9k_calculate_iter_data(sc, ctx, &iter_data);
1079
1080         if (iter_data.has_hw_macaddr)
1081                 ether_addr_copy(common->macaddr, iter_data.hw_macaddr);
1082
1083         memcpy(common->bssidmask, iter_data.mask, ETH_ALEN);
1084         ath_hw_setbssidmask(common);
1085
1086         if (iter_data.naps > 0) {
1087                 cur_conf = &ctx->beacon;
1088                 ath9k_hw_set_tsfadjust(ah, true);
1089                 ah->opmode = NL80211_IFTYPE_AP;
1090                 if (cur_conf->enable_beacon)
1091                         iter_data.beacons = true;
1092         } else {
1093                 ath9k_hw_set_tsfadjust(ah, false);
1094
1095                 if (iter_data.nmeshes)
1096                         ah->opmode = NL80211_IFTYPE_MESH_POINT;
1097                 else if (iter_data.nwds)
1098                         ah->opmode = NL80211_IFTYPE_AP;
1099                 else if (iter_data.nadhocs)
1100                         ah->opmode = NL80211_IFTYPE_ADHOC;
1101                 else
1102                         ah->opmode = NL80211_IFTYPE_STATION;
1103         }
1104
1105         ath9k_hw_setopmode(ah);
1106
1107         ctx->switch_after_beacon = false;
1108         if ((iter_data.nstations + iter_data.nadhocs + iter_data.nmeshes) > 0)
1109                 ah->imask |= ATH9K_INT_TSFOOR;
1110         else {
1111                 ah->imask &= ~ATH9K_INT_TSFOOR;
1112                 if (iter_data.naps == 1 && iter_data.beacons)
1113                         ctx->switch_after_beacon = true;
1114         }
1115
1116         ah->imask &= ~ATH9K_INT_SWBA;
1117         if (ah->opmode == NL80211_IFTYPE_STATION) {
1118                 bool changed = (iter_data.primary_sta != ctx->primary_sta);
1119
1120                 if (iter_data.primary_sta) {
1121                         iter_data.beacons = true;
1122                         ath9k_set_assoc_state(sc, iter_data.primary_sta,
1123                                               changed);
1124                         ctx->primary_sta = iter_data.primary_sta;
1125                 } else {
1126                         ctx->primary_sta = NULL;
1127                         memset(common->curbssid, 0, ETH_ALEN);
1128                         common->curaid = 0;
1129                         ath9k_hw_write_associd(sc->sc_ah);
1130                         if (ath9k_hw_mci_is_enabled(sc->sc_ah))
1131                                 ath9k_mci_update_wlan_channels(sc, true);
1132                 }
1133         } else if (iter_data.beacons) {
1134                 ah->imask |= ATH9K_INT_SWBA;
1135         }
1136         ath9k_hw_set_interrupts(ah);
1137
1138         if (iter_data.beacons)
1139                 set_bit(ATH_OP_BEACONS, &common->op_flags);
1140         else
1141                 clear_bit(ATH_OP_BEACONS, &common->op_flags);
1142
1143         if (ah->slottime != iter_data.slottime) {
1144                 ah->slottime = iter_data.slottime;
1145                 ath9k_hw_init_global_settings(ah);
1146         }
1147
1148         if (iter_data.primary_sta)
1149                 set_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags);
1150         else
1151                 clear_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags);
1152
1153         ath_dbg(common, CONFIG,
1154                 "macaddr: %pM, bssid: %pM, bssidmask: %pM\n",
1155                 common->macaddr, common->curbssid, common->bssidmask);
1156
1157         ath9k_ps_restore(sc);
1158 }
1159
1160 static void ath9k_assign_hw_queues(struct ieee80211_hw *hw,
1161                                    struct ieee80211_vif *vif)
1162 {
1163         int i;
1164
1165         if (!ath9k_is_chanctx_enabled())
1166                 return;
1167
1168         for (i = 0; i < IEEE80211_NUM_ACS; i++)
1169                 vif->hw_queue[i] = i;
1170
1171         if (vif->type == NL80211_IFTYPE_AP)
1172                 vif->cab_queue = hw->queues - 2;
1173         else
1174                 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1175 }
1176
1177 static int ath9k_add_interface(struct ieee80211_hw *hw,
1178                                struct ieee80211_vif *vif)
1179 {
1180         struct ath_softc *sc = hw->priv;
1181         struct ath_hw *ah = sc->sc_ah;
1182         struct ath_common *common = ath9k_hw_common(ah);
1183         struct ath_vif *avp = (void *)vif->drv_priv;
1184         struct ath_node *an = &avp->mcast_node;
1185
1186         mutex_lock(&sc->mutex);
1187
1188         if (config_enabled(CONFIG_ATH9K_TX99)) {
1189                 if (sc->cur_chan->nvifs >= 1) {
1190                         mutex_unlock(&sc->mutex);
1191                         return -EOPNOTSUPP;
1192                 }
1193                 sc->tx99_vif = vif;
1194         }
1195
1196         ath_dbg(common, CONFIG, "Attach a VIF of type: %d\n", vif->type);
1197         sc->cur_chan->nvifs++;
1198
1199         if (ath9k_uses_beacons(vif->type))
1200                 ath9k_beacon_assign_slot(sc, vif);
1201
1202         avp->vif = vif;
1203         if (!ath9k_is_chanctx_enabled()) {
1204                 avp->chanctx = sc->cur_chan;
1205                 list_add_tail(&avp->list, &avp->chanctx->vifs);
1206         }
1207
1208         ath9k_assign_hw_queues(hw, vif);
1209
1210         an->sc = sc;
1211         an->sta = NULL;
1212         an->vif = vif;
1213         an->no_ps_filter = true;
1214         ath_tx_node_init(sc, an);
1215
1216         mutex_unlock(&sc->mutex);
1217         return 0;
1218 }
1219
1220 static int ath9k_change_interface(struct ieee80211_hw *hw,
1221                                   struct ieee80211_vif *vif,
1222                                   enum nl80211_iftype new_type,
1223                                   bool p2p)
1224 {
1225         struct ath_softc *sc = hw->priv;
1226         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1227         struct ath_vif *avp = (void *)vif->drv_priv;
1228
1229         mutex_lock(&sc->mutex);
1230
1231         if (config_enabled(CONFIG_ATH9K_TX99)) {
1232                 mutex_unlock(&sc->mutex);
1233                 return -EOPNOTSUPP;
1234         }
1235
1236         ath_dbg(common, CONFIG, "Change Interface\n");
1237
1238         if (ath9k_uses_beacons(vif->type))
1239                 ath9k_beacon_remove_slot(sc, vif);
1240
1241         vif->type = new_type;
1242         vif->p2p = p2p;
1243
1244         if (ath9k_uses_beacons(vif->type))
1245                 ath9k_beacon_assign_slot(sc, vif);
1246
1247         ath9k_assign_hw_queues(hw, vif);
1248         ath9k_calculate_summary_state(sc, avp->chanctx);
1249
1250         mutex_unlock(&sc->mutex);
1251         return 0;
1252 }
1253
1254 static void ath9k_remove_interface(struct ieee80211_hw *hw,
1255                                    struct ieee80211_vif *vif)
1256 {
1257         struct ath_softc *sc = hw->priv;
1258         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1259         struct ath_vif *avp = (void *)vif->drv_priv;
1260
1261         ath_dbg(common, CONFIG, "Detach Interface\n");
1262
1263         mutex_lock(&sc->mutex);
1264
1265         ath9k_p2p_remove_vif(sc, vif);
1266
1267         sc->cur_chan->nvifs--;
1268         sc->tx99_vif = NULL;
1269         if (!ath9k_is_chanctx_enabled())
1270                 list_del(&avp->list);
1271
1272         if (ath9k_uses_beacons(vif->type))
1273                 ath9k_beacon_remove_slot(sc, vif);
1274
1275         ath_tx_node_cleanup(sc, &avp->mcast_node);
1276
1277         mutex_unlock(&sc->mutex);
1278 }
1279
1280 static void ath9k_enable_ps(struct ath_softc *sc)
1281 {
1282         struct ath_hw *ah = sc->sc_ah;
1283         struct ath_common *common = ath9k_hw_common(ah);
1284
1285         if (config_enabled(CONFIG_ATH9K_TX99))
1286                 return;
1287
1288         sc->ps_enabled = true;
1289         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1290                 if ((ah->imask & ATH9K_INT_TIM_TIMER) == 0) {
1291                         ah->imask |= ATH9K_INT_TIM_TIMER;
1292                         ath9k_hw_set_interrupts(ah);
1293                 }
1294                 ath9k_hw_setrxabort(ah, 1);
1295         }
1296         ath_dbg(common, PS, "PowerSave enabled\n");
1297 }
1298
1299 static void ath9k_disable_ps(struct ath_softc *sc)
1300 {
1301         struct ath_hw *ah = sc->sc_ah;
1302         struct ath_common *common = ath9k_hw_common(ah);
1303
1304         if (config_enabled(CONFIG_ATH9K_TX99))
1305                 return;
1306
1307         sc->ps_enabled = false;
1308         ath9k_hw_setpower(ah, ATH9K_PM_AWAKE);
1309         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1310                 ath9k_hw_setrxabort(ah, 0);
1311                 sc->ps_flags &= ~(PS_WAIT_FOR_BEACON |
1312                                   PS_WAIT_FOR_CAB |
1313                                   PS_WAIT_FOR_PSPOLL_DATA |
1314                                   PS_WAIT_FOR_TX_ACK);
1315                 if (ah->imask & ATH9K_INT_TIM_TIMER) {
1316                         ah->imask &= ~ATH9K_INT_TIM_TIMER;
1317                         ath9k_hw_set_interrupts(ah);
1318                 }
1319         }
1320         ath_dbg(common, PS, "PowerSave disabled\n");
1321 }
1322
1323 void ath9k_spectral_scan_trigger(struct ieee80211_hw *hw)
1324 {
1325         struct ath_softc *sc = hw->priv;
1326         struct ath_hw *ah = sc->sc_ah;
1327         struct ath_common *common = ath9k_hw_common(ah);
1328         u32 rxfilter;
1329
1330         if (config_enabled(CONFIG_ATH9K_TX99))
1331                 return;
1332
1333         if (!ath9k_hw_ops(ah)->spectral_scan_trigger) {
1334                 ath_err(common, "spectrum analyzer not implemented on this hardware\n");
1335                 return;
1336         }
1337
1338         ath9k_ps_wakeup(sc);
1339         rxfilter = ath9k_hw_getrxfilter(ah);
1340         ath9k_hw_setrxfilter(ah, rxfilter |
1341                                  ATH9K_RX_FILTER_PHYRADAR |
1342                                  ATH9K_RX_FILTER_PHYERR);
1343
1344         /* TODO: usually this should not be neccesary, but for some reason
1345          * (or in some mode?) the trigger must be called after the
1346          * configuration, otherwise the register will have its values reset
1347          * (on my ar9220 to value 0x01002310)
1348          */
1349         ath9k_spectral_scan_config(hw, sc->spectral_mode);
1350         ath9k_hw_ops(ah)->spectral_scan_trigger(ah);
1351         ath9k_ps_restore(sc);
1352 }
1353
1354 int ath9k_spectral_scan_config(struct ieee80211_hw *hw,
1355                                enum spectral_mode spectral_mode)
1356 {
1357         struct ath_softc *sc = hw->priv;
1358         struct ath_hw *ah = sc->sc_ah;
1359         struct ath_common *common = ath9k_hw_common(ah);
1360
1361         if (!ath9k_hw_ops(ah)->spectral_scan_trigger) {
1362                 ath_err(common, "spectrum analyzer not implemented on this hardware\n");
1363                 return -1;
1364         }
1365
1366         switch (spectral_mode) {
1367         case SPECTRAL_DISABLED:
1368                 sc->spec_config.enabled = 0;
1369                 break;
1370         case SPECTRAL_BACKGROUND:
1371                 /* send endless samples.
1372                  * TODO: is this really useful for "background"?
1373                  */
1374                 sc->spec_config.endless = 1;
1375                 sc->spec_config.enabled = 1;
1376                 break;
1377         case SPECTRAL_CHANSCAN:
1378         case SPECTRAL_MANUAL:
1379                 sc->spec_config.endless = 0;
1380                 sc->spec_config.enabled = 1;
1381                 break;
1382         default:
1383                 return -1;
1384         }
1385
1386         ath9k_ps_wakeup(sc);
1387         ath9k_hw_ops(ah)->spectral_scan_config(ah, &sc->spec_config);
1388         ath9k_ps_restore(sc);
1389
1390         sc->spectral_mode = spectral_mode;
1391
1392         return 0;
1393 }
1394
1395 static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
1396 {
1397         struct ath_softc *sc = hw->priv;
1398         struct ath_hw *ah = sc->sc_ah;
1399         struct ath_common *common = ath9k_hw_common(ah);
1400         struct ieee80211_conf *conf = &hw->conf;
1401         struct ath_chanctx *ctx = sc->cur_chan;
1402
1403         ath9k_ps_wakeup(sc);
1404         mutex_lock(&sc->mutex);
1405
1406         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
1407                 sc->ps_idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1408                 if (sc->ps_idle) {
1409                         ath_cancel_work(sc);
1410                         ath9k_stop_btcoex(sc);
1411                 } else {
1412                         ath9k_start_btcoex(sc);
1413                         /*
1414                          * The chip needs a reset to properly wake up from
1415                          * full sleep
1416                          */
1417                         ath_chanctx_set_channel(sc, ctx, &ctx->chandef);
1418                 }
1419         }
1420
1421         /*
1422          * We just prepare to enable PS. We have to wait until our AP has
1423          * ACK'd our null data frame to disable RX otherwise we'll ignore
1424          * those ACKs and end up retransmitting the same null data frames.
1425          * IEEE80211_CONF_CHANGE_PS is only passed by mac80211 for STA mode.
1426          */
1427         if (changed & IEEE80211_CONF_CHANGE_PS) {
1428                 unsigned long flags;
1429                 spin_lock_irqsave(&sc->sc_pm_lock, flags);
1430                 if (conf->flags & IEEE80211_CONF_PS)
1431                         ath9k_enable_ps(sc);
1432                 else
1433                         ath9k_disable_ps(sc);
1434                 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1435         }
1436
1437         if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
1438                 if (conf->flags & IEEE80211_CONF_MONITOR) {
1439                         ath_dbg(common, CONFIG, "Monitor mode is enabled\n");
1440                         sc->sc_ah->is_monitoring = true;
1441                 } else {
1442                         ath_dbg(common, CONFIG, "Monitor mode is disabled\n");
1443                         sc->sc_ah->is_monitoring = false;
1444                 }
1445         }
1446
1447         if (!ath9k_is_chanctx_enabled() && (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
1448                 ctx->offchannel = !!(conf->flags & IEEE80211_CONF_OFFCHANNEL);
1449                 ath_chanctx_set_channel(sc, ctx, &hw->conf.chandef);
1450         }
1451
1452         if (changed & IEEE80211_CONF_CHANGE_POWER) {
1453                 ath_dbg(common, CONFIG, "Set power: %d\n", conf->power_level);
1454                 sc->cur_chan->txpower = 2 * conf->power_level;
1455                 ath9k_cmn_update_txpow(ah, sc->curtxpow,
1456                                        sc->cur_chan->txpower, &sc->curtxpow);
1457         }
1458
1459         mutex_unlock(&sc->mutex);
1460         ath9k_ps_restore(sc);
1461
1462         return 0;
1463 }
1464
1465 #define SUPPORTED_FILTERS                       \
1466         (FIF_PROMISC_IN_BSS |                   \
1467         FIF_ALLMULTI |                          \
1468         FIF_CONTROL |                           \
1469         FIF_PSPOLL |                            \
1470         FIF_OTHER_BSS |                         \
1471         FIF_BCN_PRBRESP_PROMISC |               \
1472         FIF_PROBE_REQ |                         \
1473         FIF_FCSFAIL)
1474
1475 /* FIXME: sc->sc_full_reset ? */
1476 static void ath9k_configure_filter(struct ieee80211_hw *hw,
1477                                    unsigned int changed_flags,
1478                                    unsigned int *total_flags,
1479                                    u64 multicast)
1480 {
1481         struct ath_softc *sc = hw->priv;
1482         u32 rfilt;
1483
1484         changed_flags &= SUPPORTED_FILTERS;
1485         *total_flags &= SUPPORTED_FILTERS;
1486
1487         spin_lock_bh(&sc->chan_lock);
1488         sc->cur_chan->rxfilter = *total_flags;
1489         spin_unlock_bh(&sc->chan_lock);
1490
1491         ath9k_ps_wakeup(sc);
1492         rfilt = ath_calcrxfilter(sc);
1493         ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1494         ath9k_ps_restore(sc);
1495
1496         ath_dbg(ath9k_hw_common(sc->sc_ah), CONFIG, "Set HW RX filter: 0x%x\n",
1497                 rfilt);
1498 }
1499
1500 static int ath9k_sta_add(struct ieee80211_hw *hw,
1501                          struct ieee80211_vif *vif,
1502                          struct ieee80211_sta *sta)
1503 {
1504         struct ath_softc *sc = hw->priv;
1505         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1506         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1507         struct ieee80211_key_conf ps_key = { };
1508         int key;
1509
1510         ath_node_attach(sc, sta, vif);
1511
1512         if (vif->type != NL80211_IFTYPE_AP &&
1513             vif->type != NL80211_IFTYPE_AP_VLAN)
1514                 return 0;
1515
1516         key = ath_key_config(common, vif, sta, &ps_key);
1517         if (key > 0) {
1518                 an->ps_key = key;
1519                 an->key_idx[0] = key;
1520         }
1521
1522         return 0;
1523 }
1524
1525 static void ath9k_del_ps_key(struct ath_softc *sc,
1526                              struct ieee80211_vif *vif,
1527                              struct ieee80211_sta *sta)
1528 {
1529         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1530         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1531         struct ieee80211_key_conf ps_key = { .hw_key_idx = an->ps_key };
1532
1533         if (!an->ps_key)
1534             return;
1535
1536         ath_key_delete(common, &ps_key);
1537         an->ps_key = 0;
1538         an->key_idx[0] = 0;
1539 }
1540
1541 static int ath9k_sta_remove(struct ieee80211_hw *hw,
1542                             struct ieee80211_vif *vif,
1543                             struct ieee80211_sta *sta)
1544 {
1545         struct ath_softc *sc = hw->priv;
1546
1547         ath9k_del_ps_key(sc, vif, sta);
1548         ath_node_detach(sc, sta);
1549
1550         return 0;
1551 }
1552
1553 static void ath9k_sta_set_tx_filter(struct ath_hw *ah,
1554                                     struct ath_node *an,
1555                                     bool set)
1556 {
1557         int i;
1558
1559         for (i = 0; i < ARRAY_SIZE(an->key_idx); i++) {
1560                 if (!an->key_idx[i])
1561                         continue;
1562                 ath9k_hw_set_tx_filter(ah, an->key_idx[i], set);
1563         }
1564 }
1565
1566 static void ath9k_sta_notify(struct ieee80211_hw *hw,
1567                          struct ieee80211_vif *vif,
1568                          enum sta_notify_cmd cmd,
1569                          struct ieee80211_sta *sta)
1570 {
1571         struct ath_softc *sc = hw->priv;
1572         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1573
1574         switch (cmd) {
1575         case STA_NOTIFY_SLEEP:
1576                 an->sleeping = true;
1577                 ath_tx_aggr_sleep(sta, sc, an);
1578                 ath9k_sta_set_tx_filter(sc->sc_ah, an, true);
1579                 break;
1580         case STA_NOTIFY_AWAKE:
1581                 ath9k_sta_set_tx_filter(sc->sc_ah, an, false);
1582                 an->sleeping = false;
1583                 ath_tx_aggr_wakeup(sc, an);
1584                 break;
1585         }
1586 }
1587
1588 static int ath9k_conf_tx(struct ieee80211_hw *hw,
1589                          struct ieee80211_vif *vif, u16 queue,
1590                          const struct ieee80211_tx_queue_params *params)
1591 {
1592         struct ath_softc *sc = hw->priv;
1593         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1594         struct ath_txq *txq;
1595         struct ath9k_tx_queue_info qi;
1596         int ret = 0;
1597
1598         if (queue >= IEEE80211_NUM_ACS)
1599                 return 0;
1600
1601         txq = sc->tx.txq_map[queue];
1602
1603         ath9k_ps_wakeup(sc);
1604         mutex_lock(&sc->mutex);
1605
1606         memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
1607
1608         qi.tqi_aifs = params->aifs;
1609         qi.tqi_cwmin = params->cw_min;
1610         qi.tqi_cwmax = params->cw_max;
1611         qi.tqi_burstTime = params->txop * 32;
1612
1613         ath_dbg(common, CONFIG,
1614                 "Configure tx [queue/halq] [%d/%d], aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
1615                 queue, txq->axq_qnum, params->aifs, params->cw_min,
1616                 params->cw_max, params->txop);
1617
1618         ath_update_max_aggr_framelen(sc, queue, qi.tqi_burstTime);
1619         ret = ath_txq_update(sc, txq->axq_qnum, &qi);
1620         if (ret)
1621                 ath_err(common, "TXQ Update failed\n");
1622
1623         mutex_unlock(&sc->mutex);
1624         ath9k_ps_restore(sc);
1625
1626         return ret;
1627 }
1628
1629 static int ath9k_set_key(struct ieee80211_hw *hw,
1630                          enum set_key_cmd cmd,
1631                          struct ieee80211_vif *vif,
1632                          struct ieee80211_sta *sta,
1633                          struct ieee80211_key_conf *key)
1634 {
1635         struct ath_softc *sc = hw->priv;
1636         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1637         struct ath_node *an = NULL;
1638         int ret = 0, i;
1639
1640         if (ath9k_modparam_nohwcrypt)
1641                 return -ENOSPC;
1642
1643         if ((vif->type == NL80211_IFTYPE_ADHOC ||
1644              vif->type == NL80211_IFTYPE_MESH_POINT) &&
1645             (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
1646              key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
1647             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
1648                 /*
1649                  * For now, disable hw crypto for the RSN IBSS group keys. This
1650                  * could be optimized in the future to use a modified key cache
1651                  * design to support per-STA RX GTK, but until that gets
1652                  * implemented, use of software crypto for group addressed
1653                  * frames is a acceptable to allow RSN IBSS to be used.
1654                  */
1655                 return -EOPNOTSUPP;
1656         }
1657
1658         mutex_lock(&sc->mutex);
1659         ath9k_ps_wakeup(sc);
1660         ath_dbg(common, CONFIG, "Set HW Key %d\n", cmd);
1661         if (sta)
1662                 an = (struct ath_node *)sta->drv_priv;
1663
1664         switch (cmd) {
1665         case SET_KEY:
1666                 if (sta)
1667                         ath9k_del_ps_key(sc, vif, sta);
1668
1669                 key->hw_key_idx = 0;
1670                 ret = ath_key_config(common, vif, sta, key);
1671                 if (ret >= 0) {
1672                         key->hw_key_idx = ret;
1673                         /* push IV and Michael MIC generation to stack */
1674                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1675                         if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
1676                                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1677                         if (sc->sc_ah->sw_mgmt_crypto &&
1678                             key->cipher == WLAN_CIPHER_SUITE_CCMP)
1679                                 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT_TX;
1680                         ret = 0;
1681                 }
1682                 if (an && key->hw_key_idx) {
1683                         for (i = 0; i < ARRAY_SIZE(an->key_idx); i++) {
1684                                 if (an->key_idx[i])
1685                                         continue;
1686                                 an->key_idx[i] = key->hw_key_idx;
1687                                 break;
1688                         }
1689                         WARN_ON(i == ARRAY_SIZE(an->key_idx));
1690                 }
1691                 break;
1692         case DISABLE_KEY:
1693                 ath_key_delete(common, key);
1694                 if (an) {
1695                         for (i = 0; i < ARRAY_SIZE(an->key_idx); i++) {
1696                                 if (an->key_idx[i] != key->hw_key_idx)
1697                                         continue;
1698                                 an->key_idx[i] = 0;
1699                                 break;
1700                         }
1701                 }
1702                 key->hw_key_idx = 0;
1703                 break;
1704         default:
1705                 ret = -EINVAL;
1706         }
1707
1708         ath9k_ps_restore(sc);
1709         mutex_unlock(&sc->mutex);
1710
1711         return ret;
1712 }
1713
1714 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
1715                                    struct ieee80211_vif *vif,
1716                                    struct ieee80211_bss_conf *bss_conf,
1717                                    u32 changed)
1718 {
1719 #define CHECK_ANI                               \
1720         (BSS_CHANGED_ASSOC |                    \
1721          BSS_CHANGED_IBSS |                     \
1722          BSS_CHANGED_BEACON_ENABLED)
1723
1724         struct ath_softc *sc = hw->priv;
1725         struct ath_hw *ah = sc->sc_ah;
1726         struct ath_common *common = ath9k_hw_common(ah);
1727         struct ath_vif *avp = (void *)vif->drv_priv;
1728         int slottime;
1729
1730         ath9k_ps_wakeup(sc);
1731         mutex_lock(&sc->mutex);
1732
1733         if (changed & BSS_CHANGED_ASSOC) {
1734                 ath_dbg(common, CONFIG, "BSSID %pM Changed ASSOC %d\n",
1735                         bss_conf->bssid, bss_conf->assoc);
1736
1737                 ether_addr_copy(avp->bssid, bss_conf->bssid);
1738                 avp->aid = bss_conf->aid;
1739                 avp->assoc = bss_conf->assoc;
1740
1741                 ath9k_calculate_summary_state(sc, avp->chanctx);
1742
1743                 if (ath9k_is_chanctx_enabled()) {
1744                         if (bss_conf->assoc)
1745                                 ath_chanctx_event(sc, vif,
1746                                                   ATH_CHANCTX_EVENT_ASSOC);
1747                 }
1748         }
1749
1750         if (changed & BSS_CHANGED_IBSS) {
1751                 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1752                 common->curaid = bss_conf->aid;
1753                 ath9k_hw_write_associd(sc->sc_ah);
1754         }
1755
1756         if ((changed & BSS_CHANGED_BEACON_ENABLED) ||
1757             (changed & BSS_CHANGED_BEACON_INT) ||
1758             (changed & BSS_CHANGED_BEACON_INFO)) {
1759                 ath9k_beacon_config(sc, vif, changed);
1760                 if (changed & BSS_CHANGED_BEACON_ENABLED)
1761                         ath9k_calculate_summary_state(sc, avp->chanctx);
1762         }
1763
1764         if ((avp->chanctx == sc->cur_chan) &&
1765             (changed & BSS_CHANGED_ERP_SLOT)) {
1766                 if (bss_conf->use_short_slot)
1767                         slottime = 9;
1768                 else
1769                         slottime = 20;
1770                 if (vif->type == NL80211_IFTYPE_AP) {
1771                         /*
1772                          * Defer update, so that connected stations can adjust
1773                          * their settings at the same time.
1774                          * See beacon.c for more details
1775                          */
1776                         sc->beacon.slottime = slottime;
1777                         sc->beacon.updateslot = UPDATE;
1778                 } else {
1779                         ah->slottime = slottime;
1780                         ath9k_hw_init_global_settings(ah);
1781                 }
1782         }
1783
1784         if (changed & BSS_CHANGED_P2P_PS)
1785                 ath9k_p2p_bss_info_changed(sc, vif);
1786
1787         if (changed & CHECK_ANI)
1788                 ath_check_ani(sc);
1789
1790         mutex_unlock(&sc->mutex);
1791         ath9k_ps_restore(sc);
1792
1793 #undef CHECK_ANI
1794 }
1795
1796 static u64 ath9k_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1797 {
1798         struct ath_softc *sc = hw->priv;
1799         u64 tsf;
1800
1801         mutex_lock(&sc->mutex);
1802         ath9k_ps_wakeup(sc);
1803         tsf = ath9k_hw_gettsf64(sc->sc_ah);
1804         ath9k_ps_restore(sc);
1805         mutex_unlock(&sc->mutex);
1806
1807         return tsf;
1808 }
1809
1810 static void ath9k_set_tsf(struct ieee80211_hw *hw,
1811                           struct ieee80211_vif *vif,
1812                           u64 tsf)
1813 {
1814         struct ath_softc *sc = hw->priv;
1815
1816         mutex_lock(&sc->mutex);
1817         ath9k_ps_wakeup(sc);
1818         ath9k_hw_settsf64(sc->sc_ah, tsf);
1819         ath9k_ps_restore(sc);
1820         mutex_unlock(&sc->mutex);
1821 }
1822
1823 static void ath9k_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1824 {
1825         struct ath_softc *sc = hw->priv;
1826
1827         mutex_lock(&sc->mutex);
1828
1829         ath9k_ps_wakeup(sc);
1830         ath9k_hw_reset_tsf(sc->sc_ah);
1831         ath9k_ps_restore(sc);
1832
1833         mutex_unlock(&sc->mutex);
1834 }
1835
1836 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
1837                               struct ieee80211_vif *vif,
1838                               enum ieee80211_ampdu_mlme_action action,
1839                               struct ieee80211_sta *sta,
1840                               u16 tid, u16 *ssn, u8 buf_size)
1841 {
1842         struct ath_softc *sc = hw->priv;
1843         bool flush = false;
1844         int ret = 0;
1845
1846         mutex_lock(&sc->mutex);
1847
1848         switch (action) {
1849         case IEEE80211_AMPDU_RX_START:
1850                 break;
1851         case IEEE80211_AMPDU_RX_STOP:
1852                 break;
1853         case IEEE80211_AMPDU_TX_START:
1854                 ath9k_ps_wakeup(sc);
1855                 ret = ath_tx_aggr_start(sc, sta, tid, ssn);
1856                 if (!ret)
1857                         ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1858                 ath9k_ps_restore(sc);
1859                 break;
1860         case IEEE80211_AMPDU_TX_STOP_FLUSH:
1861         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1862                 flush = true;
1863         case IEEE80211_AMPDU_TX_STOP_CONT:
1864                 ath9k_ps_wakeup(sc);
1865                 ath_tx_aggr_stop(sc, sta, tid);
1866                 if (!flush)
1867                         ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1868                 ath9k_ps_restore(sc);
1869                 break;
1870         case IEEE80211_AMPDU_TX_OPERATIONAL:
1871                 ath9k_ps_wakeup(sc);
1872                 ath_tx_aggr_resume(sc, sta, tid);
1873                 ath9k_ps_restore(sc);
1874                 break;
1875         default:
1876                 ath_err(ath9k_hw_common(sc->sc_ah), "Unknown AMPDU action\n");
1877         }
1878
1879         mutex_unlock(&sc->mutex);
1880
1881         return ret;
1882 }
1883
1884 static int ath9k_get_survey(struct ieee80211_hw *hw, int idx,
1885                              struct survey_info *survey)
1886 {
1887         struct ath_softc *sc = hw->priv;
1888         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1889         struct ieee80211_supported_band *sband;
1890         struct ieee80211_channel *chan;
1891         int pos;
1892
1893         if (config_enabled(CONFIG_ATH9K_TX99))
1894                 return -EOPNOTSUPP;
1895
1896         spin_lock_bh(&common->cc_lock);
1897         if (idx == 0)
1898                 ath_update_survey_stats(sc);
1899
1900         sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ];
1901         if (sband && idx >= sband->n_channels) {
1902                 idx -= sband->n_channels;
1903                 sband = NULL;
1904         }
1905
1906         if (!sband)
1907                 sband = hw->wiphy->bands[IEEE80211_BAND_5GHZ];
1908
1909         if (!sband || idx >= sband->n_channels) {
1910                 spin_unlock_bh(&common->cc_lock);
1911                 return -ENOENT;
1912         }
1913
1914         chan = &sband->channels[idx];
1915         pos = chan->hw_value;
1916         memcpy(survey, &sc->survey[pos], sizeof(*survey));
1917         survey->channel = chan;
1918         spin_unlock_bh(&common->cc_lock);
1919
1920         return 0;
1921 }
1922
1923 static void ath9k_enable_dynack(struct ath_softc *sc)
1924 {
1925 #ifdef CONFIG_ATH9K_DYNACK
1926         u32 rfilt;
1927         struct ath_hw *ah = sc->sc_ah;
1928
1929         ath_dynack_reset(ah);
1930
1931         ah->dynack.enabled = true;
1932         rfilt = ath_calcrxfilter(sc);
1933         ath9k_hw_setrxfilter(ah, rfilt);
1934 #endif
1935 }
1936
1937 static void ath9k_set_coverage_class(struct ieee80211_hw *hw,
1938                                      s16 coverage_class)
1939 {
1940         struct ath_softc *sc = hw->priv;
1941         struct ath_hw *ah = sc->sc_ah;
1942
1943         if (config_enabled(CONFIG_ATH9K_TX99))
1944                 return;
1945
1946         mutex_lock(&sc->mutex);
1947
1948         if (coverage_class >= 0) {
1949                 ah->coverage_class = coverage_class;
1950                 if (ah->dynack.enabled) {
1951                         u32 rfilt;
1952
1953                         ah->dynack.enabled = false;
1954                         rfilt = ath_calcrxfilter(sc);
1955                         ath9k_hw_setrxfilter(ah, rfilt);
1956                 }
1957                 ath9k_ps_wakeup(sc);
1958                 ath9k_hw_init_global_settings(ah);
1959                 ath9k_ps_restore(sc);
1960         } else if (!ah->dynack.enabled) {
1961                 ath9k_enable_dynack(sc);
1962         }
1963
1964         mutex_unlock(&sc->mutex);
1965 }
1966
1967 static bool ath9k_has_tx_pending(struct ath_softc *sc)
1968 {
1969         int i, npend = 0;
1970
1971         for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
1972                 if (!ATH_TXQ_SETUP(sc, i))
1973                         continue;
1974
1975                 npend = ath9k_has_pending_frames(sc, &sc->tx.txq[i]);
1976                 if (npend)
1977                         break;
1978         }
1979
1980         return !!npend;
1981 }
1982
1983 static void ath9k_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1984                         u32 queues, bool drop)
1985 {
1986         struct ath_softc *sc = hw->priv;
1987
1988         mutex_lock(&sc->mutex);
1989         __ath9k_flush(hw, queues, drop);
1990         mutex_unlock(&sc->mutex);
1991 }
1992
1993 void __ath9k_flush(struct ieee80211_hw *hw, u32 queues, bool drop)
1994 {
1995         struct ath_softc *sc = hw->priv;
1996         struct ath_hw *ah = sc->sc_ah;
1997         struct ath_common *common = ath9k_hw_common(ah);
1998         int timeout = HZ / 5; /* 200 ms */
1999         bool drain_txq;
2000
2001         cancel_delayed_work_sync(&sc->tx_complete_work);
2002
2003         if (ah->ah_flags & AH_UNPLUGGED) {
2004                 ath_dbg(common, ANY, "Device has been unplugged!\n");
2005                 return;
2006         }
2007
2008         if (test_bit(ATH_OP_INVALID, &common->op_flags)) {
2009                 ath_dbg(common, ANY, "Device not present\n");
2010                 return;
2011         }
2012
2013         if (wait_event_timeout(sc->tx_wait, !ath9k_has_tx_pending(sc),
2014                                timeout) > 0)
2015                 drop = false;
2016
2017         if (drop) {
2018                 ath9k_ps_wakeup(sc);
2019                 spin_lock_bh(&sc->sc_pcu_lock);
2020                 drain_txq = ath_drain_all_txq(sc);
2021                 spin_unlock_bh(&sc->sc_pcu_lock);
2022
2023                 if (!drain_txq)
2024                         ath_reset(sc);
2025
2026                 ath9k_ps_restore(sc);
2027         }
2028
2029         ieee80211_queue_delayed_work(hw, &sc->tx_complete_work, 0);
2030 }
2031
2032 static bool ath9k_tx_frames_pending(struct ieee80211_hw *hw)
2033 {
2034         struct ath_softc *sc = hw->priv;
2035
2036         return ath9k_has_tx_pending(sc);
2037 }
2038
2039 static int ath9k_tx_last_beacon(struct ieee80211_hw *hw)
2040 {
2041         struct ath_softc *sc = hw->priv;
2042         struct ath_hw *ah = sc->sc_ah;
2043         struct ieee80211_vif *vif;
2044         struct ath_vif *avp;
2045         struct ath_buf *bf;
2046         struct ath_tx_status ts;
2047         bool edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA);
2048         int status;
2049
2050         vif = sc->beacon.bslot[0];
2051         if (!vif)
2052                 return 0;
2053
2054         if (!vif->bss_conf.enable_beacon)
2055                 return 0;
2056
2057         avp = (void *)vif->drv_priv;
2058
2059         if (!sc->beacon.tx_processed && !edma) {
2060                 tasklet_disable(&sc->bcon_tasklet);
2061
2062                 bf = avp->av_bcbuf;
2063                 if (!bf || !bf->bf_mpdu)
2064                         goto skip;
2065
2066                 status = ath9k_hw_txprocdesc(ah, bf->bf_desc, &ts);
2067                 if (status == -EINPROGRESS)
2068                         goto skip;
2069
2070                 sc->beacon.tx_processed = true;
2071                 sc->beacon.tx_last = !(ts.ts_status & ATH9K_TXERR_MASK);
2072
2073 skip:
2074                 tasklet_enable(&sc->bcon_tasklet);
2075         }
2076
2077         return sc->beacon.tx_last;
2078 }
2079
2080 static int ath9k_get_stats(struct ieee80211_hw *hw,
2081                            struct ieee80211_low_level_stats *stats)
2082 {
2083         struct ath_softc *sc = hw->priv;
2084         struct ath_hw *ah = sc->sc_ah;
2085         struct ath9k_mib_stats *mib_stats = &ah->ah_mibStats;
2086
2087         stats->dot11ACKFailureCount = mib_stats->ackrcv_bad;
2088         stats->dot11RTSFailureCount = mib_stats->rts_bad;
2089         stats->dot11FCSErrorCount = mib_stats->fcs_bad;
2090         stats->dot11RTSSuccessCount = mib_stats->rts_good;
2091         return 0;
2092 }
2093
2094 static u32 fill_chainmask(u32 cap, u32 new)
2095 {
2096         u32 filled = 0;
2097         int i;
2098
2099         for (i = 0; cap && new; i++, cap >>= 1) {
2100                 if (!(cap & BIT(0)))
2101                         continue;
2102
2103                 if (new & BIT(0))
2104                         filled |= BIT(i);
2105
2106                 new >>= 1;
2107         }
2108
2109         return filled;
2110 }
2111
2112 static bool validate_antenna_mask(struct ath_hw *ah, u32 val)
2113 {
2114         if (AR_SREV_9300_20_OR_LATER(ah))
2115                 return true;
2116
2117         switch (val & 0x7) {
2118         case 0x1:
2119         case 0x3:
2120         case 0x7:
2121                 return true;
2122         case 0x2:
2123                 return (ah->caps.rx_chainmask == 1);
2124         default:
2125                 return false;
2126         }
2127 }
2128
2129 static int ath9k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
2130 {
2131         struct ath_softc *sc = hw->priv;
2132         struct ath_hw *ah = sc->sc_ah;
2133
2134         if (ah->caps.rx_chainmask != 1)
2135                 rx_ant |= tx_ant;
2136
2137         if (!validate_antenna_mask(ah, rx_ant) || !tx_ant)
2138                 return -EINVAL;
2139
2140         sc->ant_rx = rx_ant;
2141         sc->ant_tx = tx_ant;
2142
2143         if (ah->caps.rx_chainmask == 1)
2144                 return 0;
2145
2146         /* AR9100 runs into calibration issues if not all rx chains are enabled */
2147         if (AR_SREV_9100(ah))
2148                 ah->rxchainmask = 0x7;
2149         else
2150                 ah->rxchainmask = fill_chainmask(ah->caps.rx_chainmask, rx_ant);
2151
2152         ah->txchainmask = fill_chainmask(ah->caps.tx_chainmask, tx_ant);
2153         ath9k_cmn_reload_chainmask(ah);
2154
2155         return 0;
2156 }
2157
2158 static int ath9k_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant)
2159 {
2160         struct ath_softc *sc = hw->priv;
2161
2162         *tx_ant = sc->ant_tx;
2163         *rx_ant = sc->ant_rx;
2164         return 0;
2165 }
2166
2167 static void ath9k_sw_scan_start(struct ieee80211_hw *hw)
2168 {
2169         struct ath_softc *sc = hw->priv;
2170         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2171         set_bit(ATH_OP_SCANNING, &common->op_flags);
2172 }
2173
2174 static void ath9k_sw_scan_complete(struct ieee80211_hw *hw)
2175 {
2176         struct ath_softc *sc = hw->priv;
2177         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2178         clear_bit(ATH_OP_SCANNING, &common->op_flags);
2179 }
2180
2181 #ifdef CONFIG_ATH9K_CHANNEL_CONTEXT
2182
2183 static int ath9k_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2184                          struct ieee80211_scan_request *hw_req)
2185 {
2186         struct cfg80211_scan_request *req = &hw_req->req;
2187         struct ath_softc *sc = hw->priv;
2188         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2189         int ret = 0;
2190
2191         mutex_lock(&sc->mutex);
2192
2193         if (WARN_ON(sc->offchannel.scan_req)) {
2194                 ret = -EBUSY;
2195                 goto out;
2196         }
2197
2198         ath9k_ps_wakeup(sc);
2199         set_bit(ATH_OP_SCANNING, &common->op_flags);
2200         sc->offchannel.scan_vif = vif;
2201         sc->offchannel.scan_req = req;
2202         sc->offchannel.scan_idx = 0;
2203
2204         ath_dbg(common, CHAN_CTX, "HW scan request received on vif: %pM\n",
2205                 vif->addr);
2206
2207         if (sc->offchannel.state == ATH_OFFCHANNEL_IDLE) {
2208                 ath_dbg(common, CHAN_CTX, "Starting HW scan\n");
2209                 ath_offchannel_next(sc);
2210         }
2211
2212 out:
2213         mutex_unlock(&sc->mutex);
2214
2215         return ret;
2216 }
2217
2218 static void ath9k_cancel_hw_scan(struct ieee80211_hw *hw,
2219                                  struct ieee80211_vif *vif)
2220 {
2221         struct ath_softc *sc = hw->priv;
2222         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2223
2224         ath_dbg(common, CHAN_CTX, "Cancel HW scan on vif: %pM\n", vif->addr);
2225
2226         mutex_lock(&sc->mutex);
2227         del_timer_sync(&sc->offchannel.timer);
2228         ath_scan_complete(sc, true);
2229         mutex_unlock(&sc->mutex);
2230 }
2231
2232 static int ath9k_remain_on_channel(struct ieee80211_hw *hw,
2233                                    struct ieee80211_vif *vif,
2234                                    struct ieee80211_channel *chan, int duration,
2235                                    enum ieee80211_roc_type type)
2236 {
2237         struct ath_softc *sc = hw->priv;
2238         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2239         int ret = 0;
2240
2241         mutex_lock(&sc->mutex);
2242
2243         if (WARN_ON(sc->offchannel.roc_vif)) {
2244                 ret = -EBUSY;
2245                 goto out;
2246         }
2247
2248         ath9k_ps_wakeup(sc);
2249         sc->offchannel.roc_vif = vif;
2250         sc->offchannel.roc_chan = chan;
2251         sc->offchannel.roc_duration = duration;
2252
2253         ath_dbg(common, CHAN_CTX,
2254                 "RoC request on vif: %pM, type: %d duration: %d\n",
2255                 vif->addr, type, duration);
2256
2257         if (sc->offchannel.state == ATH_OFFCHANNEL_IDLE) {
2258                 ath_dbg(common, CHAN_CTX, "Starting RoC period\n");
2259                 ath_offchannel_next(sc);
2260         }
2261
2262 out:
2263         mutex_unlock(&sc->mutex);
2264
2265         return ret;
2266 }
2267
2268 static int ath9k_cancel_remain_on_channel(struct ieee80211_hw *hw)
2269 {
2270         struct ath_softc *sc = hw->priv;
2271         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2272
2273         mutex_lock(&sc->mutex);
2274
2275         ath_dbg(common, CHAN_CTX, "Cancel RoC\n");
2276         del_timer_sync(&sc->offchannel.timer);
2277
2278         if (sc->offchannel.roc_vif) {
2279                 if (sc->offchannel.state >= ATH_OFFCHANNEL_ROC_START)
2280                         ath_roc_complete(sc, true);
2281         }
2282
2283         mutex_unlock(&sc->mutex);
2284
2285         return 0;
2286 }
2287
2288 static int ath9k_add_chanctx(struct ieee80211_hw *hw,
2289                              struct ieee80211_chanctx_conf *conf)
2290 {
2291         struct ath_softc *sc = hw->priv;
2292         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2293         struct ath_chanctx *ctx, **ptr;
2294         int pos;
2295
2296         mutex_lock(&sc->mutex);
2297
2298         ath_for_each_chanctx(sc, ctx) {
2299                 if (ctx->assigned)
2300                         continue;
2301
2302                 ptr = (void *) conf->drv_priv;
2303                 *ptr = ctx;
2304                 ctx->assigned = true;
2305                 pos = ctx - &sc->chanctx[0];
2306                 ctx->hw_queue_base = pos * IEEE80211_NUM_ACS;
2307
2308                 ath_dbg(common, CHAN_CTX,
2309                         "Add channel context: %d MHz\n",
2310                         conf->def.chan->center_freq);
2311
2312                 ath_chanctx_set_channel(sc, ctx, &conf->def);
2313                 ath_chanctx_event(sc, NULL, ATH_CHANCTX_EVENT_ASSIGN);
2314
2315                 mutex_unlock(&sc->mutex);
2316                 return 0;
2317         }
2318
2319         mutex_unlock(&sc->mutex);
2320         return -ENOSPC;
2321 }
2322
2323
2324 static void ath9k_remove_chanctx(struct ieee80211_hw *hw,
2325                                  struct ieee80211_chanctx_conf *conf)
2326 {
2327         struct ath_softc *sc = hw->priv;
2328         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2329         struct ath_chanctx *ctx = ath_chanctx_get(conf);
2330
2331         mutex_lock(&sc->mutex);
2332
2333         ath_dbg(common, CHAN_CTX,
2334                 "Remove channel context: %d MHz\n",
2335                 conf->def.chan->center_freq);
2336
2337         ctx->assigned = false;
2338         ctx->hw_queue_base = 0;
2339         ath_chanctx_event(sc, NULL, ATH_CHANCTX_EVENT_UNASSIGN);
2340
2341         mutex_unlock(&sc->mutex);
2342 }
2343
2344 static void ath9k_change_chanctx(struct ieee80211_hw *hw,
2345                                  struct ieee80211_chanctx_conf *conf,
2346                                  u32 changed)
2347 {
2348         struct ath_softc *sc = hw->priv;
2349         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2350         struct ath_chanctx *ctx = ath_chanctx_get(conf);
2351
2352         mutex_lock(&sc->mutex);
2353         ath_dbg(common, CHAN_CTX,
2354                 "Change channel context: %d MHz\n",
2355                 conf->def.chan->center_freq);
2356         ath_chanctx_set_channel(sc, ctx, &conf->def);
2357         mutex_unlock(&sc->mutex);
2358 }
2359
2360 static int ath9k_assign_vif_chanctx(struct ieee80211_hw *hw,
2361                                     struct ieee80211_vif *vif,
2362                                     struct ieee80211_chanctx_conf *conf)
2363 {
2364         struct ath_softc *sc = hw->priv;
2365         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2366         struct ath_vif *avp = (void *)vif->drv_priv;
2367         struct ath_chanctx *ctx = ath_chanctx_get(conf);
2368         int i;
2369
2370         mutex_lock(&sc->mutex);
2371
2372         ath_dbg(common, CHAN_CTX,
2373                 "Assign VIF (addr: %pM, type: %d, p2p: %d) to channel context: %d MHz\n",
2374                 vif->addr, vif->type, vif->p2p,
2375                 conf->def.chan->center_freq);
2376
2377         avp->chanctx = ctx;
2378         ctx->nvifs_assigned++;
2379         list_add_tail(&avp->list, &ctx->vifs);
2380         ath9k_calculate_summary_state(sc, ctx);
2381         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2382                 vif->hw_queue[i] = ctx->hw_queue_base + i;
2383
2384         mutex_unlock(&sc->mutex);
2385
2386         return 0;
2387 }
2388
2389 static void ath9k_unassign_vif_chanctx(struct ieee80211_hw *hw,
2390                                        struct ieee80211_vif *vif,
2391                                        struct ieee80211_chanctx_conf *conf)
2392 {
2393         struct ath_softc *sc = hw->priv;
2394         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2395         struct ath_vif *avp = (void *)vif->drv_priv;
2396         struct ath_chanctx *ctx = ath_chanctx_get(conf);
2397         int ac;
2398
2399         mutex_lock(&sc->mutex);
2400
2401         ath_dbg(common, CHAN_CTX,
2402                 "Remove VIF (addr: %pM, type: %d, p2p: %d) from channel context: %d MHz\n",
2403                 vif->addr, vif->type, vif->p2p,
2404                 conf->def.chan->center_freq);
2405
2406         avp->chanctx = NULL;
2407         ctx->nvifs_assigned--;
2408         list_del(&avp->list);
2409         ath9k_calculate_summary_state(sc, ctx);
2410         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2411                 vif->hw_queue[ac] = IEEE80211_INVAL_HW_QUEUE;
2412
2413         mutex_unlock(&sc->mutex);
2414 }
2415
2416 static void ath9k_mgd_prepare_tx(struct ieee80211_hw *hw,
2417                                  struct ieee80211_vif *vif)
2418 {
2419         struct ath_softc *sc = hw->priv;
2420         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2421         struct ath_vif *avp = (struct ath_vif *) vif->drv_priv;
2422         bool changed = false;
2423
2424         if (!test_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags))
2425                 return;
2426
2427         if (!avp->chanctx)
2428                 return;
2429
2430         mutex_lock(&sc->mutex);
2431
2432         spin_lock_bh(&sc->chan_lock);
2433         if (sc->next_chan || (sc->cur_chan != avp->chanctx)) {
2434                 sc->next_chan = avp->chanctx;
2435                 changed = true;
2436         }
2437         ath_dbg(common, CHAN_CTX,
2438                 "%s: Set chanctx state to FORCE_ACTIVE, changed: %d\n",
2439                 __func__, changed);
2440         sc->sched.state = ATH_CHANCTX_STATE_FORCE_ACTIVE;
2441         spin_unlock_bh(&sc->chan_lock);
2442
2443         if (changed)
2444                 ath_chanctx_set_next(sc, true);
2445
2446         mutex_unlock(&sc->mutex);
2447 }
2448
2449 void ath9k_fill_chanctx_ops(void)
2450 {
2451         if (!ath9k_is_chanctx_enabled())
2452                 return;
2453
2454         ath9k_ops.hw_scan                  = ath9k_hw_scan;
2455         ath9k_ops.cancel_hw_scan           = ath9k_cancel_hw_scan;
2456         ath9k_ops.remain_on_channel        = ath9k_remain_on_channel;
2457         ath9k_ops.cancel_remain_on_channel = ath9k_cancel_remain_on_channel;
2458         ath9k_ops.add_chanctx              = ath9k_add_chanctx;
2459         ath9k_ops.remove_chanctx           = ath9k_remove_chanctx;
2460         ath9k_ops.change_chanctx           = ath9k_change_chanctx;
2461         ath9k_ops.assign_vif_chanctx       = ath9k_assign_vif_chanctx;
2462         ath9k_ops.unassign_vif_chanctx     = ath9k_unassign_vif_chanctx;
2463         ath9k_ops.mgd_prepare_tx           = ath9k_mgd_prepare_tx;
2464 }
2465
2466 #endif
2467
2468 struct ieee80211_ops ath9k_ops = {
2469         .tx                 = ath9k_tx,
2470         .start              = ath9k_start,
2471         .stop               = ath9k_stop,
2472         .add_interface      = ath9k_add_interface,
2473         .change_interface   = ath9k_change_interface,
2474         .remove_interface   = ath9k_remove_interface,
2475         .config             = ath9k_config,
2476         .configure_filter   = ath9k_configure_filter,
2477         .sta_add            = ath9k_sta_add,
2478         .sta_remove         = ath9k_sta_remove,
2479         .sta_notify         = ath9k_sta_notify,
2480         .conf_tx            = ath9k_conf_tx,
2481         .bss_info_changed   = ath9k_bss_info_changed,
2482         .set_key            = ath9k_set_key,
2483         .get_tsf            = ath9k_get_tsf,
2484         .set_tsf            = ath9k_set_tsf,
2485         .reset_tsf          = ath9k_reset_tsf,
2486         .ampdu_action       = ath9k_ampdu_action,
2487         .get_survey         = ath9k_get_survey,
2488         .rfkill_poll        = ath9k_rfkill_poll_state,
2489         .set_coverage_class = ath9k_set_coverage_class,
2490         .flush              = ath9k_flush,
2491         .tx_frames_pending  = ath9k_tx_frames_pending,
2492         .tx_last_beacon     = ath9k_tx_last_beacon,
2493         .release_buffered_frames = ath9k_release_buffered_frames,
2494         .get_stats          = ath9k_get_stats,
2495         .set_antenna        = ath9k_set_antenna,
2496         .get_antenna        = ath9k_get_antenna,
2497
2498 #ifdef CONFIG_ATH9K_WOW
2499         .suspend            = ath9k_suspend,
2500         .resume             = ath9k_resume,
2501         .set_wakeup         = ath9k_set_wakeup,
2502 #endif
2503
2504 #ifdef CONFIG_ATH9K_DEBUGFS
2505         .get_et_sset_count  = ath9k_get_et_sset_count,
2506         .get_et_stats       = ath9k_get_et_stats,
2507         .get_et_strings     = ath9k_get_et_strings,
2508 #endif
2509
2510 #if defined(CONFIG_MAC80211_DEBUGFS) && defined(CONFIG_ATH9K_STATION_STATISTICS)
2511         .sta_add_debugfs    = ath9k_sta_add_debugfs,
2512 #endif
2513         .sw_scan_start      = ath9k_sw_scan_start,
2514         .sw_scan_complete   = ath9k_sw_scan_complete,
2515 };