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 static u8 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 || !list_empty(&txq->axq_acq))
  64                 pending = true;
  65
  66         spin_unlock_bh(&txq->axq_lock);
  67         return pending;
  68 }
  69
  70 static bool ath9k_setpower(struct ath_softc *sc, enum ath9k_power_mode mode)
  71 {
  72         unsigned long flags;
  73         bool ret;
  74
  75         spin_lock_irqsave(&sc->sc_pm_lock, flags);
  76         ret = ath9k_hw_setpower(sc->sc_ah, mode);
  77         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
  78
  79         return ret;
  80 }
  81
  82 void ath9k_ps_wakeup(struct ath_softc *sc)
  83 {
  84         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
  85         unsigned long flags;
  86         enum ath9k_power_mode power_mode;
  87
  88         spin_lock_irqsave(&sc->sc_pm_lock, flags);
  89         if (++sc->ps_usecount != 1)
  90                 goto unlock;
  91
  92         power_mode = sc->sc_ah->power_mode;
  93         ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
  94
  95         /*
  96          * While the hardware is asleep, the cycle counters contain no
  97          * useful data. Better clear them now so that they don't mess up
  98          * survey data results.
  99          */
 100         if (power_mode != ATH9K_PM_AWAKE) {
 101                 spin_lock(&common->cc_lock);
 102                 ath_hw_cycle_counters_update(common);
 103                 memset(&common->cc_survey, 0, sizeof(common->cc_survey));
 104                 spin_unlock(&common->cc_lock);
 105         }
 106
 107  unlock:
 108         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 109 }
 110
 111 void ath9k_ps_restore(struct ath_softc *sc)
 112 {
 113         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 114         enum ath9k_power_mode mode;
 115         unsigned long flags;
 116
 117         spin_lock_irqsave(&sc->sc_pm_lock, flags);
 118         if (--sc->ps_usecount != 0)
 119                 goto unlock;
 120
 121         if (sc->ps_idle && (sc->ps_flags & PS_WAIT_FOR_TX_ACK))
 122                 mode = ATH9K_PM_FULL_SLEEP;
 123         else if (sc->ps_enabled &&
 124                  !(sc->ps_flags & (PS_WAIT_FOR_BEACON |
 125                               PS_WAIT_FOR_CAB |
 126                               PS_WAIT_FOR_PSPOLL_DATA |
 127                               PS_WAIT_FOR_TX_ACK)))
 128                 mode = ATH9K_PM_NETWORK_SLEEP;
 129         else
 130                 goto unlock;
 131
 132         spin_lock(&common->cc_lock);
 133         ath_hw_cycle_counters_update(common);
 134         spin_unlock(&common->cc_lock);
 135
 136         ath9k_hw_setpower(sc->sc_ah, mode);
 137
 138  unlock:
 139         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 140 }
 141
 142 void ath_start_ani(struct ath_common *common)
 143 {
 144         struct ath_hw *ah = common->ah;
 145         unsigned long timestamp = jiffies_to_msecs(jiffies);
 146         struct ath_softc *sc = (struct ath_softc *) common->priv;
 147
 148         if (!(sc->sc_flags & SC_OP_ANI_RUN))
 149                 return;
 150
 151         if (sc->sc_flags & SC_OP_OFFCHANNEL)
 152                 return;
 153
 154         common->ani.longcal_timer = timestamp;
 155         common->ani.shortcal_timer = timestamp;
 156         common->ani.checkani_timer = timestamp;
 157
 158         mod_timer(&common->ani.timer,
 159                   jiffies +
 160                         msecs_to_jiffies((u32)ah->config.ani_poll_interval));
 161 }
 162
 163 static void ath_update_survey_nf(struct ath_softc *sc, int channel)
 164 {
 165         struct ath_hw *ah = sc->sc_ah;
 166         struct ath9k_channel *chan = &ah->channels[channel];
 167         struct survey_info *survey = &sc->survey[channel];
 168
 169         if (chan->noisefloor) {
 170                 survey->filled |= SURVEY_INFO_NOISE_DBM;
 171                 survey->noise = ath9k_hw_getchan_noise(ah, chan);
 172         }
 173 }
 174
 175 /*
 176  * Updates the survey statistics and returns the busy time since last
 177  * update in %, if the measurement duration was long enough for the
 178  * result to be useful, -1 otherwise.
 179  */
 180 static int ath_update_survey_stats(struct ath_softc *sc)
 181 {
 182         struct ath_hw *ah = sc->sc_ah;
 183         struct ath_common *common = ath9k_hw_common(ah);
 184         int pos = ah->curchan - &ah->channels[0];
 185         struct survey_info *survey = &sc->survey[pos];
 186         struct ath_cycle_counters *cc = &common->cc_survey;
 187         unsigned int div = common->clockrate * 1000;
 188         int ret = 0;
 189
 190         if (!ah->curchan)
 191                 return -1;
 192
 193         if (ah->power_mode == ATH9K_PM_AWAKE)
 194                 ath_hw_cycle_counters_update(common);
 195
 196         if (cc->cycles > 0) {
 197                 survey->filled |= SURVEY_INFO_CHANNEL_TIME |
 198                         SURVEY_INFO_CHANNEL_TIME_BUSY |
 199                         SURVEY_INFO_CHANNEL_TIME_RX |
 200                         SURVEY_INFO_CHANNEL_TIME_TX;
 201                 survey->channel_time += cc->cycles / div;
 202                 survey->channel_time_busy += cc->rx_busy / div;
 203                 survey->channel_time_rx += cc->rx_frame / div;
 204                 survey->channel_time_tx += cc->tx_frame / div;
 205         }
 206
 207         if (cc->cycles < div)
 208                 return -1;
 209
 210         if (cc->cycles > 0)
 211                 ret = cc->rx_busy * 100 / cc->cycles;
 212
 213         memset(cc, 0, sizeof(*cc));
 214
 215         ath_update_survey_nf(sc, pos);
 216
 217         return ret;
 218 }
 219
 220 static void __ath_cancel_work(struct ath_softc *sc)
 221 {
 222         cancel_work_sync(&sc->paprd_work);
 223         cancel_work_sync(&sc->hw_check_work);
 224         cancel_delayed_work_sync(&sc->tx_complete_work);
 225         cancel_delayed_work_sync(&sc->hw_pll_work);
 226 }
 227
 228 static void ath_cancel_work(struct ath_softc *sc)
 229 {
 230         __ath_cancel_work(sc);
 231         cancel_work_sync(&sc->hw_reset_work);
 232 }
 233
 234 static bool ath_prepare_reset(struct ath_softc *sc, bool retry_tx, bool flush)
 235 {
 236         struct ath_hw *ah = sc->sc_ah;
 237         struct ath_common *common = ath9k_hw_common(ah);
 238         bool ret;
 239
 240         ieee80211_stop_queues(sc->hw);
 241
 242         sc->hw_busy_count = 0;
 243         del_timer_sync(&common->ani.timer);
 244
 245         ath9k_debug_samp_bb_mac(sc);
 246         ath9k_hw_disable_interrupts(ah);
 247
 248         ret = ath_drain_all_txq(sc, retry_tx);
 249
 250         if (!ath_stoprecv(sc))
 251                 ret = false;
 252
 253         if (!flush) {
 254                 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
 255                         ath_rx_tasklet(sc, 1, true);
 256                 ath_rx_tasklet(sc, 1, false);
 257         } else {
 258                 ath_flushrecv(sc);
 259         }
 260
 261         return ret;
 262 }
 263
 264 static bool ath_complete_reset(struct ath_softc *sc, bool start)
 265 {
 266         struct ath_hw *ah = sc->sc_ah;
 267         struct ath_common *common = ath9k_hw_common(ah);
 268
 269         if (ath_startrecv(sc) != 0) {
 270                 ath_err(common, "Unable to restart recv logic\n");
 271                 return false;
 272         }
 273
 274         ath9k_cmn_update_txpow(ah, sc->curtxpow,
 275                                sc->config.txpowlimit, &sc->curtxpow);
 276         ath9k_hw_set_interrupts(ah);
 277         ath9k_hw_enable_interrupts(ah);
 278
 279         if (!(sc->sc_flags & (SC_OP_OFFCHANNEL)) && start) {
 280                 if (sc->sc_flags & SC_OP_BEACONS)
 281                         ath_set_beacon(sc);
 282
 283                 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
 284                 ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/2);
 285                 if (!common->disable_ani)
 286                         ath_start_ani(common);
 287         }
 288
 289         if ((ah->caps.hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB) && sc->ant_rx != 3) {
 290                 struct ath_hw_antcomb_conf div_ant_conf;
 291                 u8 lna_conf;
 292
 293                 ath9k_hw_antdiv_comb_conf_get(ah, &div_ant_conf);
 294
 295                 if (sc->ant_rx == 1)
 296                         lna_conf = ATH_ANT_DIV_COMB_LNA1;
 297                 else
 298                         lna_conf = ATH_ANT_DIV_COMB_LNA2;
 299                 div_ant_conf.main_lna_conf = lna_conf;
 300                 div_ant_conf.alt_lna_conf = lna_conf;
 301
 302                 ath9k_hw_antdiv_comb_conf_set(ah, &div_ant_conf);
 303         }
 304
 305         ieee80211_wake_queues(sc->hw);
 306
 307         return true;
 308 }
 309
 310 static int ath_reset_internal(struct ath_softc *sc, struct ath9k_channel *hchan,
 311                               bool retry_tx)
 312 {
 313         struct ath_hw *ah = sc->sc_ah;
 314         struct ath_common *common = ath9k_hw_common(ah);
 315         struct ath9k_hw_cal_data *caldata = NULL;
 316         bool fastcc = true;
 317         bool flush = false;
 318         int r;
 319
 320         __ath_cancel_work(sc);
 321
 322         spin_lock_bh(&sc->sc_pcu_lock);
 323
 324         if (!(sc->sc_flags & SC_OP_OFFCHANNEL)) {
 325                 fastcc = false;
 326                 caldata = &sc->caldata;
 327         }
 328
 329         if (!hchan) {
 330                 fastcc = false;
 331                 flush = true;
 332                 hchan = ah->curchan;
 333         }
 334
 335         if (fastcc && (ah->chip_fullsleep ||
 336             !ath9k_hw_check_alive(ah)))
 337                 fastcc = false;
 338
 339         if (!ath_prepare_reset(sc, retry_tx, flush))
 340                 fastcc = false;
 341
 342         ath_dbg(common, CONFIG, "Reset to %u MHz, HT40: %d fastcc: %d\n",
 343                 hchan->channel, !!(hchan->channelFlags & (CHANNEL_HT40MINUS |
 344                                                           CHANNEL_HT40PLUS)),
 345                 fastcc);
 346
 347         r = ath9k_hw_reset(ah, hchan, caldata, fastcc);
 348         if (r) {
 349                 ath_err(common,
 350                         "Unable to reset channel, reset status %d\n", r);
 351                 goto out;
 352         }
 353
 354         if (!ath_complete_reset(sc, true))
 355                 r = -EIO;
 356
 357 out:
 358         spin_unlock_bh(&sc->sc_pcu_lock);
 359         return r;
 360 }
 361
 362
 363 /*
 364  * Set/change channels.  If the channel is really being changed, it's done
 365  * by reseting the chip.  To accomplish this we must first cleanup any pending
 366  * DMA, then restart stuff.
 367 */
 368 static int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
 369                     struct ath9k_channel *hchan)
 370 {
 371         int r;
 372
 373         if (sc->sc_flags & SC_OP_INVALID)
 374                 return -EIO;
 375
 376         ath9k_ps_wakeup(sc);
 377
 378         r = ath_reset_internal(sc, hchan, false);
 379
 380         ath9k_ps_restore(sc);
 381
 382         return r;
 383 }
 384
 385 static void ath_paprd_activate(struct ath_softc *sc)
 386 {
 387         struct ath_hw *ah = sc->sc_ah;
 388         struct ath9k_hw_cal_data *caldata = ah->caldata;
 389         int chain;
 390
 391         if (!caldata || !caldata->paprd_done)
 392                 return;
 393
 394         ath9k_ps_wakeup(sc);
 395         ar9003_paprd_enable(ah, false);
 396         for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
 397                 if (!(ah->txchainmask & BIT(chain)))
 398                         continue;
 399
 400                 ar9003_paprd_populate_single_table(ah, caldata, chain);
 401         }
 402
 403         ar9003_paprd_enable(ah, true);
 404         ath9k_ps_restore(sc);
 405 }
 406
 407 static bool ath_paprd_send_frame(struct ath_softc *sc, struct sk_buff *skb, int chain)
 408 {
 409         struct ieee80211_hw *hw = sc->hw;
 410         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
 411         struct ath_hw *ah = sc->sc_ah;
 412         struct ath_common *common = ath9k_hw_common(ah);
 413         struct ath_tx_control txctl;
 414         int time_left;
 415
 416         memset(&txctl, 0, sizeof(txctl));
 417         txctl.txq = sc->tx.txq_map[WME_AC_BE];
 418
 419         memset(tx_info, 0, sizeof(*tx_info));
 420         tx_info->band = hw->conf.channel->band;
 421         tx_info->flags |= IEEE80211_TX_CTL_NO_ACK;
 422         tx_info->control.rates[0].idx = 0;
 423         tx_info->control.rates[0].count = 1;
 424         tx_info->control.rates[0].flags = IEEE80211_TX_RC_MCS;
 425         tx_info->control.rates[1].idx = -1;
 426
 427         init_completion(&sc->paprd_complete);
 428         txctl.paprd = BIT(chain);
 429
 430         if (ath_tx_start(hw, skb, &txctl) != 0) {
 431                 ath_dbg(common, CALIBRATE, "PAPRD TX failed\n");
 432                 dev_kfree_skb_any(skb);
 433                 return false;
 434         }
 435
 436         time_left = wait_for_completion_timeout(&sc->paprd_complete,
 437                         msecs_to_jiffies(ATH_PAPRD_TIMEOUT));
 438
 439         if (!time_left)
 440                 ath_dbg(common, CALIBRATE,
 441                         "Timeout waiting for paprd training on TX chain %d\n",
 442                         chain);
 443
 444         return !!time_left;
 445 }
 446
 447 void ath_paprd_calibrate(struct work_struct *work)
 448 {
 449         struct ath_softc *sc = container_of(work, struct ath_softc, paprd_work);
 450         struct ieee80211_hw *hw = sc->hw;
 451         struct ath_hw *ah = sc->sc_ah;
 452         struct ieee80211_hdr *hdr;
 453         struct sk_buff *skb = NULL;
 454         struct ath9k_hw_cal_data *caldata = ah->caldata;
 455         struct ath_common *common = ath9k_hw_common(ah);
 456         int ftype;
 457         int chain_ok = 0;
 458         int chain;
 459         int len = 1800;
 460
 461         if (!caldata)
 462                 return;
 463
 464         ath9k_ps_wakeup(sc);
 465
 466         if (ar9003_paprd_init_table(ah) < 0)
 467                 goto fail_paprd;
 468
 469         skb = alloc_skb(len, GFP_KERNEL);
 470         if (!skb)
 471                 goto fail_paprd;
 472
 473         skb_put(skb, len);
 474         memset(skb->data, 0, len);
 475         hdr = (struct ieee80211_hdr *)skb->data;
 476         ftype = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC;
 477         hdr->frame_control = cpu_to_le16(ftype);
 478         hdr->duration_id = cpu_to_le16(10);
 479         memcpy(hdr->addr1, hw->wiphy->perm_addr, ETH_ALEN);
 480         memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN);
 481         memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN);
 482
 483         for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
 484                 if (!(ah->txchainmask & BIT(chain)))
 485                         continue;
 486
 487                 chain_ok = 0;
 488
 489                 ath_dbg(common, CALIBRATE,
 490                         "Sending PAPRD frame for thermal measurement on chain %d\n",
 491                         chain);
 492                 if (!ath_paprd_send_frame(sc, skb, chain))
 493                         goto fail_paprd;
 494
 495                 ar9003_paprd_setup_gain_table(ah, chain);
 496
 497                 ath_dbg(common, CALIBRATE,
 498                         "Sending PAPRD training frame on chain %d\n", chain);
 499                 if (!ath_paprd_send_frame(sc, skb, chain))
 500                         goto fail_paprd;
 501
 502                 if (!ar9003_paprd_is_done(ah)) {
 503                         ath_dbg(common, CALIBRATE,
 504                                 "PAPRD not yet done on chain %d\n", chain);
 505                         break;
 506                 }
 507
 508                 if (ar9003_paprd_create_curve(ah, caldata, chain)) {
 509                         ath_dbg(common, CALIBRATE,
 510                                 "PAPRD create curve failed on chain %d\n",
 511                                                                    chain);
 512                         break;
 513                 }
 514
 515                 chain_ok = 1;
 516         }
 517         kfree_skb(skb);
 518
 519         if (chain_ok) {
 520                 caldata->paprd_done = true;
 521                 ath_paprd_activate(sc);
 522         }
 523
 524 fail_paprd:
 525         ath9k_ps_restore(sc);
 526 }
 527
 528 /*
 529  *  This routine performs the periodic noise floor calibration function
 530  *  that is used to adjust and optimize the chip performance.  This
 531  *  takes environmental changes (location, temperature) into account.
 532  *  When the task is complete, it reschedules itself depending on the
 533  *  appropriate interval that was calculated.
 534  */
 535 void ath_ani_calibrate(unsigned long data)
 536 {
 537         struct ath_softc *sc = (struct ath_softc *)data;
 538         struct ath_hw *ah = sc->sc_ah;
 539         struct ath_common *common = ath9k_hw_common(ah);
 540         bool longcal = false;
 541         bool shortcal = false;
 542         bool aniflag = false;
 543         unsigned int timestamp = jiffies_to_msecs(jiffies);
 544         u32 cal_interval, short_cal_interval, long_cal_interval;
 545         unsigned long flags;
 546
 547         if (ah->caldata && ah->caldata->nfcal_interference)
 548                 long_cal_interval = ATH_LONG_CALINTERVAL_INT;
 549         else
 550                 long_cal_interval = ATH_LONG_CALINTERVAL;
 551
 552         short_cal_interval = (ah->opmode == NL80211_IFTYPE_AP) ?
 553                 ATH_AP_SHORT_CALINTERVAL : ATH_STA_SHORT_CALINTERVAL;
 554
 555         /* Only calibrate if awake */
 556         if (sc->sc_ah->power_mode != ATH9K_PM_AWAKE)
 557                 goto set_timer;
 558
 559         ath9k_ps_wakeup(sc);
 560
 561         /* Long calibration runs independently of short calibration. */
 562         if ((timestamp - common->ani.longcal_timer) >= long_cal_interval) {
 563                 longcal = true;
 564                 common->ani.longcal_timer = timestamp;
 565         }
 566
 567         /* Short calibration applies only while caldone is false */
 568         if (!common->ani.caldone) {
 569                 if ((timestamp - common->ani.shortcal_timer) >= short_cal_interval) {
 570                         shortcal = true;
 571                         common->ani.shortcal_timer = timestamp;
 572                         common->ani.resetcal_timer = timestamp;
 573                 }
 574         } else {
 575                 if ((timestamp - common->ani.resetcal_timer) >=
 576                     ATH_RESTART_CALINTERVAL) {
 577                         common->ani.caldone = ath9k_hw_reset_calvalid(ah);
 578                         if (common->ani.caldone)
 579                                 common->ani.resetcal_timer = timestamp;
 580                 }
 581         }
 582
 583         /* Verify whether we must check ANI */
 584         if (sc->sc_ah->config.enable_ani
 585             && (timestamp - common->ani.checkani_timer) >=
 586             ah->config.ani_poll_interval) {
 587                 aniflag = true;
 588                 common->ani.checkani_timer = timestamp;
 589         }
 590
 591         /* Call ANI routine if necessary */
 592         if (aniflag) {
 593                 spin_lock_irqsave(&common->cc_lock, flags);
 594                 ath9k_hw_ani_monitor(ah, ah->curchan);
 595                 ath_update_survey_stats(sc);
 596                 spin_unlock_irqrestore(&common->cc_lock, flags);
 597         }
 598
 599         /* Perform calibration if necessary */
 600         if (longcal || shortcal) {
 601                 common->ani.caldone =
 602                         ath9k_hw_calibrate(ah, ah->curchan,
 603                                                 ah->rxchainmask, longcal);
 604         }
 605
 606         ath_dbg(common, ANI,
 607                 "Calibration @%lu finished: %s %s %s, caldone: %s\n",
 608                 jiffies,
 609                 longcal ? "long" : "", shortcal ? "short" : "",
 610                 aniflag ? "ani" : "", common->ani.caldone ? "true" : "false");
 611
 612         ath9k_ps_restore(sc);
 613
 614 set_timer:
 615         /*
 616         * Set timer interval based on previous results.
 617         * The interval must be the shortest necessary to satisfy ANI,
 618         * short calibration and long calibration.
 619         */
 620         ath9k_debug_samp_bb_mac(sc);
 621         cal_interval = ATH_LONG_CALINTERVAL;
 622         if (sc->sc_ah->config.enable_ani)
 623                 cal_interval = min(cal_interval,
 624                                    (u32)ah->config.ani_poll_interval);
 625         if (!common->ani.caldone)
 626                 cal_interval = min(cal_interval, (u32)short_cal_interval);
 627
 628         mod_timer(&common->ani.timer, jiffies + msecs_to_jiffies(cal_interval));
 629         if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_PAPRD) && ah->caldata) {
 630                 if (!ah->caldata->paprd_done)
 631                         ieee80211_queue_work(sc->hw, &sc->paprd_work);
 632                 else if (!ah->paprd_table_write_done)
 633                         ath_paprd_activate(sc);
 634         }
 635 }
 636
 637 static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta,
 638                             struct ieee80211_vif *vif)
 639 {
 640         struct ath_node *an;
 641         an = (struct ath_node *)sta->drv_priv;
 642
 643 #ifdef CONFIG_ATH9K_DEBUGFS
 644         spin_lock(&sc->nodes_lock);
 645         list_add(&an->list, &sc->nodes);
 646         spin_unlock(&sc->nodes_lock);
 647 #endif
 648         an->sta = sta;
 649         an->vif = vif;
 650         if (sc->sc_flags & SC_OP_TXAGGR) {
 651                 ath_tx_node_init(sc, an);
 652                 an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR +
 653                                      sta->ht_cap.ampdu_factor);
 654                 an->mpdudensity = parse_mpdudensity(sta->ht_cap.ampdu_density);
 655         }
 656 }
 657
 658 static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
 659 {
 660         struct ath_node *an = (struct ath_node *)sta->drv_priv;
 661
 662 #ifdef CONFIG_ATH9K_DEBUGFS
 663         spin_lock(&sc->nodes_lock);
 664         list_del(&an->list);
 665         spin_unlock(&sc->nodes_lock);
 666         an->sta = NULL;
 667 #endif
 668
 669         if (sc->sc_flags & SC_OP_TXAGGR)
 670                 ath_tx_node_cleanup(sc, an);
 671 }
 672
 673
 674 void ath9k_tasklet(unsigned long data)
 675 {
 676         struct ath_softc *sc = (struct ath_softc *)data;
 677         struct ath_hw *ah = sc->sc_ah;
 678         struct ath_common *common = ath9k_hw_common(ah);
 679
 680         u32 status = sc->intrstatus;
 681         u32 rxmask;
 682
 683         ath9k_ps_wakeup(sc);
 684         spin_lock(&sc->sc_pcu_lock);
 685
 686         if ((status & ATH9K_INT_FATAL) ||
 687             (status & ATH9K_INT_BB_WATCHDOG)) {
 688 #ifdef CONFIG_ATH9K_DEBUGFS
 689                 enum ath_reset_type type;
 690
 691                 if (status & ATH9K_INT_FATAL)
 692                         type = RESET_TYPE_FATAL_INT;
 693                 else
 694                         type = RESET_TYPE_BB_WATCHDOG;
 695
 696                 RESET_STAT_INC(sc, type);
 697 #endif
 698                 ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
 699                 goto out;
 700         }
 701
 702         /*
 703          * Only run the baseband hang check if beacons stop working in AP or
 704          * IBSS mode, because it has a high false positive rate. For station
 705          * mode it should not be necessary, since the upper layers will detect
 706          * this through a beacon miss automatically and the following channel
 707          * change will trigger a hardware reset anyway
 708          */
 709         if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0 &&
 710             !ath9k_hw_check_alive(ah))
 711                 ieee80211_queue_work(sc->hw, &sc->hw_check_work);
 712
 713         if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) {
 714                 /*
 715                  * TSF sync does not look correct; remain awake to sync with
 716                  * the next Beacon.
 717                  */
 718                 ath_dbg(common, PS, "TSFOOR - Sync with next Beacon\n");
 719                 sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC;
 720         }
 721
 722         if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
 723                 rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL |
 724                           ATH9K_INT_RXORN);
 725         else
 726                 rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
 727
 728         if (status & rxmask) {
 729                 /* Check for high priority Rx first */
 730                 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
 731                     (status & ATH9K_INT_RXHP))
 732                         ath_rx_tasklet(sc, 0, true);
 733
 734                 ath_rx_tasklet(sc, 0, false);
 735         }
 736
 737         if (status & ATH9K_INT_TX) {
 738                 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
 739                         ath_tx_edma_tasklet(sc);
 740                 else
 741                         ath_tx_tasklet(sc);
 742         }
 743
 744         if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE)
 745                 if (status & ATH9K_INT_GENTIMER)
 746                         ath_gen_timer_isr(sc->sc_ah);
 747
 748         if ((status & ATH9K_INT_MCI) && ATH9K_HW_CAP_MCI)
 749                 ath_mci_intr(sc);
 750
 751 out:
 752         /* re-enable hardware interrupt */
 753         ath9k_hw_enable_interrupts(ah);
 754
 755         spin_unlock(&sc->sc_pcu_lock);
 756         ath9k_ps_restore(sc);
 757 }
 758
 759 irqreturn_t ath_isr(int irq, void *dev)
 760 {
 761 #define SCHED_INTR (                            \
 762                 ATH9K_INT_FATAL |               \
 763                 ATH9K_INT_BB_WATCHDOG |         \
 764                 ATH9K_INT_RXORN |               \
 765                 ATH9K_INT_RXEOL |               \
 766                 ATH9K_INT_RX |                  \
 767                 ATH9K_INT_RXLP |                \
 768                 ATH9K_INT_RXHP |                \
 769                 ATH9K_INT_TX |                  \
 770                 ATH9K_INT_BMISS |               \
 771                 ATH9K_INT_CST |                 \
 772                 ATH9K_INT_TSFOOR |              \
 773                 ATH9K_INT_GENTIMER |            \
 774                 ATH9K_INT_MCI)
 775
 776         struct ath_softc *sc = dev;
 777         struct ath_hw *ah = sc->sc_ah;
 778         struct ath_common *common = ath9k_hw_common(ah);
 779         enum ath9k_int status;
 780         bool sched = false;
 781
 782         /*
 783          * The hardware is not ready/present, don't
 784          * touch anything. Note this can happen early
 785          * on if the IRQ is shared.
 786          */
 787         if (sc->sc_flags & SC_OP_INVALID)
 788                 return IRQ_NONE;
 789
 790
 791         /* shared irq, not for us */
 792
 793         if (!ath9k_hw_intrpend(ah))
 794                 return IRQ_NONE;
 795
 796         /*
 797          * Figure out the reason(s) for the interrupt.  Note
 798          * that the hal returns a pseudo-ISR that may include
 799          * bits we haven't explicitly enabled so we mask the
 800          * value to insure we only process bits we requested.
 801          */
 802         ath9k_hw_getisr(ah, &status);   /* NB: clears ISR too */
 803         status &= ah->imask;    /* discard unasked-for bits */
 804
 805         /*
 806          * If there are no status bits set, then this interrupt was not
 807          * for me (should have been caught above).
 808          */
 809         if (!status)
 810                 return IRQ_NONE;
 811
 812         /* Cache the status */
 813         sc->intrstatus = status;
 814
 815         if (status & SCHED_INTR)
 816                 sched = true;
 817
 818         /*
 819          * If a FATAL or RXORN interrupt is received, we have to reset the
 820          * chip immediately.
 821          */
 822         if ((status & ATH9K_INT_FATAL) || ((status & ATH9K_INT_RXORN) &&
 823             !(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)))
 824                 goto chip_reset;
 825
 826         if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
 827             (status & ATH9K_INT_BB_WATCHDOG)) {
 828
 829                 spin_lock(&common->cc_lock);
 830                 ath_hw_cycle_counters_update(common);
 831                 ar9003_hw_bb_watchdog_dbg_info(ah);
 832                 spin_unlock(&common->cc_lock);
 833
 834                 goto chip_reset;
 835         }
 836
 837         if (status & ATH9K_INT_SWBA)
 838                 tasklet_schedule(&sc->bcon_tasklet);
 839
 840         if (status & ATH9K_INT_TXURN)
 841                 ath9k_hw_updatetxtriglevel(ah, true);
 842
 843         if (status & ATH9K_INT_RXEOL) {
 844                 ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
 845                 ath9k_hw_set_interrupts(ah);
 846         }
 847
 848         if (status & ATH9K_INT_MIB) {
 849                 /*
 850                  * Disable interrupts until we service the MIB
 851                  * interrupt; otherwise it will continue to
 852                  * fire.
 853                  */
 854                 ath9k_hw_disable_interrupts(ah);
 855                 /*
 856                  * Let the hal handle the event. We assume
 857                  * it will clear whatever condition caused
 858                  * the interrupt.
 859                  */
 860                 spin_lock(&common->cc_lock);
 861                 ath9k_hw_proc_mib_event(ah);
 862                 spin_unlock(&common->cc_lock);
 863                 ath9k_hw_enable_interrupts(ah);
 864         }
 865
 866         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
 867                 if (status & ATH9K_INT_TIM_TIMER) {
 868                         if (ATH_DBG_WARN_ON_ONCE(sc->ps_idle))
 869                                 goto chip_reset;
 870                         /* Clear RxAbort bit so that we can
 871                          * receive frames */
 872                         ath9k_setpower(sc, ATH9K_PM_AWAKE);
 873                         ath9k_hw_setrxabort(sc->sc_ah, 0);
 874                         sc->ps_flags |= PS_WAIT_FOR_BEACON;
 875                 }
 876
 877 chip_reset:
 878
 879         ath_debug_stat_interrupt(sc, status);
 880
 881         if (sched) {
 882                 /* turn off every interrupt */
 883                 ath9k_hw_disable_interrupts(ah);
 884                 tasklet_schedule(&sc->intr_tq);
 885         }
 886
 887         return IRQ_HANDLED;
 888
 889 #undef SCHED_INTR
 890 }
 891
 892 static int ath_reset(struct ath_softc *sc, bool retry_tx)
 893 {
 894         int r;
 895
 896         ath9k_ps_wakeup(sc);
 897
 898         r = ath_reset_internal(sc, NULL, retry_tx);
 899
 900         if (retry_tx) {
 901                 int i;
 902                 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
 903                         if (ATH_TXQ_SETUP(sc, i)) {
 904                                 spin_lock_bh(&sc->tx.txq[i].axq_lock);
 905                                 ath_txq_schedule(sc, &sc->tx.txq[i]);
 906                                 spin_unlock_bh(&sc->tx.txq[i].axq_lock);
 907                         }
 908                 }
 909         }
 910
 911         ath9k_ps_restore(sc);
 912
 913         return r;
 914 }
 915
 916 void ath_reset_work(struct work_struct *work)
 917 {
 918         struct ath_softc *sc = container_of(work, struct ath_softc, hw_reset_work);
 919
 920         ath_reset(sc, true);
 921 }
 922
 923 void ath_hw_check(struct work_struct *work)
 924 {
 925         struct ath_softc *sc = container_of(work, struct ath_softc, hw_check_work);
 926         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 927         unsigned long flags;
 928         int busy;
 929
 930         ath9k_ps_wakeup(sc);
 931         if (ath9k_hw_check_alive(sc->sc_ah))
 932                 goto out;
 933
 934         spin_lock_irqsave(&common->cc_lock, flags);
 935         busy = ath_update_survey_stats(sc);
 936         spin_unlock_irqrestore(&common->cc_lock, flags);
 937
 938         ath_dbg(common, RESET, "Possible baseband hang, busy=%d (try %d)\n",
 939                 busy, sc->hw_busy_count + 1);
 940         if (busy >= 99) {
 941                 if (++sc->hw_busy_count >= 3) {
 942                         RESET_STAT_INC(sc, RESET_TYPE_BB_HANG);
 943                         ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
 944                 }
 945
 946         } else if (busy >= 0)
 947                 sc->hw_busy_count = 0;
 948
 949 out:
 950         ath9k_ps_restore(sc);
 951 }
 952
 953 static void ath_hw_pll_rx_hang_check(struct ath_softc *sc, u32 pll_sqsum)
 954 {
 955         static int count;
 956         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 957
 958         if (pll_sqsum >= 0x40000) {
 959                 count++;
 960                 if (count == 3) {
 961                         /* Rx is hung for more than 500ms. Reset it */
 962                         ath_dbg(common, RESET, "Possible RX hang, resetting\n");
 963                         RESET_STAT_INC(sc, RESET_TYPE_PLL_HANG);
 964                         ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
 965                         count = 0;
 966                 }
 967         } else
 968                 count = 0;
 969 }
 970
 971 void ath_hw_pll_work(struct work_struct *work)
 972 {
 973         struct ath_softc *sc = container_of(work, struct ath_softc,
 974                                             hw_pll_work.work);
 975         u32 pll_sqsum;
 976
 977         if (AR_SREV_9485(sc->sc_ah)) {
 978
 979                 ath9k_ps_wakeup(sc);
 980                 pll_sqsum = ar9003_get_pll_sqsum_dvc(sc->sc_ah);
 981                 ath9k_ps_restore(sc);
 982
 983                 ath_hw_pll_rx_hang_check(sc, pll_sqsum);
 984
 985                 ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/5);
 986         }
 987 }
 988
 989 /**********************/
 990 /* mac80211 callbacks */
 991 /**********************/
 992
 993 static int ath9k_start(struct ieee80211_hw *hw)
 994 {
 995         struct ath_softc *sc = hw->priv;
 996         struct ath_hw *ah = sc->sc_ah;
 997         struct ath_common *common = ath9k_hw_common(ah);
 998         struct ieee80211_channel *curchan = hw->conf.channel;
 999         struct ath9k_channel *init_channel;
1000         int r;
1001
1002         ath_dbg(common, CONFIG,
1003                 "Starting driver with initial channel: %d MHz\n",
1004                 curchan->center_freq);
1005
1006         ath9k_ps_wakeup(sc);
1007
1008         mutex_lock(&sc->mutex);
1009
1010         /* setup initial channel */
1011         sc->chan_idx = curchan->hw_value;
1012
1013         init_channel = ath9k_cmn_get_curchannel(hw, ah);
1014
1015         /* Reset SERDES registers */
1016         ath9k_hw_configpcipowersave(ah, false);
1017
1018         /*
1019          * The basic interface to setting the hardware in a good
1020          * state is ``reset''.  On return the hardware is known to
1021          * be powered up and with interrupts disabled.  This must
1022          * be followed by initialization of the appropriate bits
1023          * and then setup of the interrupt mask.
1024          */
1025         spin_lock_bh(&sc->sc_pcu_lock);
1026
1027         atomic_set(&ah->intr_ref_cnt, -1);
1028
1029         r = ath9k_hw_reset(ah, init_channel, ah->caldata, false);
1030         if (r) {
1031                 ath_err(common,
1032                         "Unable to reset hardware; reset status %d (freq %u MHz)\n",
1033                         r, curchan->center_freq);
1034                 spin_unlock_bh(&sc->sc_pcu_lock);
1035                 goto mutex_unlock;
1036         }
1037
1038         /* Setup our intr mask. */
1039         ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL |
1040                     ATH9K_INT_RXORN | ATH9K_INT_FATAL |
1041                     ATH9K_INT_GLOBAL;
1042
1043         if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
1044                 ah->imask |= ATH9K_INT_RXHP |
1045                              ATH9K_INT_RXLP |
1046                              ATH9K_INT_BB_WATCHDOG;
1047         else
1048                 ah->imask |= ATH9K_INT_RX;
1049
1050         ah->imask |= ATH9K_INT_GTT;
1051
1052         if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
1053                 ah->imask |= ATH9K_INT_CST;
1054
1055         if (ah->caps.hw_caps & ATH9K_HW_CAP_MCI)
1056                 ah->imask |= ATH9K_INT_MCI;
1057
1058         sc->sc_flags &= ~SC_OP_INVALID;
1059         sc->sc_ah->is_monitoring = false;
1060
1061         /* Disable BMISS interrupt when we're not associated */
1062         ah->imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
1063
1064         if (!ath_complete_reset(sc, false)) {
1065                 r = -EIO;
1066                 spin_unlock_bh(&sc->sc_pcu_lock);
1067                 goto mutex_unlock;
1068         }
1069
1070         if (ah->led_pin >= 0) {
1071                 ath9k_hw_cfg_output(ah, ah->led_pin,
1072                                     AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
1073                 ath9k_hw_set_gpio(ah, ah->led_pin, 0);
1074         }
1075
1076         /*
1077          * Reset key cache to sane defaults (all entries cleared) instead of
1078          * semi-random values after suspend/resume.
1079          */
1080         ath9k_cmn_init_crypto(sc->sc_ah);
1081
1082         spin_unlock_bh(&sc->sc_pcu_lock);
1083
1084         if ((ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) &&
1085             !ah->btcoex_hw.enabled) {
1086                 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI))
1087                         ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
1088                                                    AR_STOMP_LOW_WLAN_WGHT);
1089                 ath9k_hw_btcoex_enable(ah);
1090
1091                 if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE)
1092                         ath9k_btcoex_timer_resume(sc);
1093         }
1094
1095         if (ah->caps.pcie_lcr_extsync_en && common->bus_ops->extn_synch_en)
1096                 common->bus_ops->extn_synch_en(common);
1097
1098 mutex_unlock:
1099         mutex_unlock(&sc->mutex);
1100
1101         ath9k_ps_restore(sc);
1102
1103         return r;
1104 }
1105
1106 static void ath9k_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
1107 {
1108         struct ath_softc *sc = hw->priv;
1109         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1110         struct ath_tx_control txctl;
1111         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1112
1113         if (sc->ps_enabled) {
1114                 /*
1115                  * mac80211 does not set PM field for normal data frames, so we
1116                  * need to update that based on the current PS mode.
1117                  */
1118                 if (ieee80211_is_data(hdr->frame_control) &&
1119                     !ieee80211_is_nullfunc(hdr->frame_control) &&
1120                     !ieee80211_has_pm(hdr->frame_control)) {
1121                         ath_dbg(common, PS,
1122                                 "Add PM=1 for a TX frame while in PS mode\n");
1123                         hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1124                 }
1125         }
1126
1127         /*
1128          * Cannot tx while the hardware is in full sleep, it first needs a full
1129          * chip reset to recover from that
1130          */
1131         if (unlikely(sc->sc_ah->power_mode == ATH9K_PM_FULL_SLEEP))
1132                 goto exit;
1133
1134         if (unlikely(sc->sc_ah->power_mode != ATH9K_PM_AWAKE)) {
1135                 /*
1136                  * We are using PS-Poll and mac80211 can request TX while in
1137                  * power save mode. Need to wake up hardware for the TX to be
1138                  * completed and if needed, also for RX of buffered frames.
1139                  */
1140                 ath9k_ps_wakeup(sc);
1141                 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
1142                         ath9k_hw_setrxabort(sc->sc_ah, 0);
1143                 if (ieee80211_is_pspoll(hdr->frame_control)) {
1144                         ath_dbg(common, PS,
1145                                 "Sending PS-Poll to pick a buffered frame\n");
1146                         sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA;
1147                 } else {
1148                         ath_dbg(common, PS, "Wake up to complete TX\n");
1149                         sc->ps_flags |= PS_WAIT_FOR_TX_ACK;
1150                 }
1151                 /*
1152                  * The actual restore operation will happen only after
1153                  * the sc_flags bit is cleared. We are just dropping
1154                  * the ps_usecount here.
1155                  */
1156                 ath9k_ps_restore(sc);
1157         }
1158
1159         memset(&txctl, 0, sizeof(struct ath_tx_control));
1160         txctl.txq = sc->tx.txq_map[skb_get_queue_mapping(skb)];
1161
1162         ath_dbg(common, XMIT, "transmitting packet, skb: %p\n", skb);
1163
1164         if (ath_tx_start(hw, skb, &txctl) != 0) {
1165                 ath_dbg(common, XMIT, "TX failed\n");
1166                 goto exit;
1167         }
1168
1169         return;
1170 exit:
1171         dev_kfree_skb_any(skb);
1172 }
1173
1174 static void ath9k_stop(struct ieee80211_hw *hw)
1175 {
1176         struct ath_softc *sc = hw->priv;
1177         struct ath_hw *ah = sc->sc_ah;
1178         struct ath_common *common = ath9k_hw_common(ah);
1179         bool prev_idle;
1180
1181         mutex_lock(&sc->mutex);
1182
1183         ath_cancel_work(sc);
1184
1185         if (sc->sc_flags & SC_OP_INVALID) {
1186                 ath_dbg(common, ANY, "Device not present\n");
1187                 mutex_unlock(&sc->mutex);
1188                 return;
1189         }
1190
1191         /* Ensure HW is awake when we try to shut it down. */
1192         ath9k_ps_wakeup(sc);
1193
1194         if (ah->btcoex_hw.enabled &&
1195             ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) {
1196                 ath9k_hw_btcoex_disable(ah);
1197                 if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE)
1198                         ath9k_btcoex_timer_pause(sc);
1199                 ath_mci_flush_profile(&sc->btcoex.mci);
1200         }
1201
1202         spin_lock_bh(&sc->sc_pcu_lock);
1203
1204         /* prevent tasklets to enable interrupts once we disable them */
1205         ah->imask &= ~ATH9K_INT_GLOBAL;
1206
1207         /* make sure h/w will not generate any interrupt
1208          * before setting the invalid flag. */
1209         ath9k_hw_disable_interrupts(ah);
1210
1211         spin_unlock_bh(&sc->sc_pcu_lock);
1212
1213         /* we can now sync irq and kill any running tasklets, since we already
1214          * disabled interrupts and not holding a spin lock */
1215         synchronize_irq(sc->irq);
1216         tasklet_kill(&sc->intr_tq);
1217         tasklet_kill(&sc->bcon_tasklet);
1218
1219         prev_idle = sc->ps_idle;
1220         sc->ps_idle = true;
1221
1222         spin_lock_bh(&sc->sc_pcu_lock);
1223
1224         if (ah->led_pin >= 0) {
1225                 ath9k_hw_set_gpio(ah, ah->led_pin, 1);
1226                 ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
1227         }
1228
1229         ath_prepare_reset(sc, false, true);
1230
1231         if (sc->rx.frag) {
1232                 dev_kfree_skb_any(sc->rx.frag);
1233                 sc->rx.frag = NULL;
1234         }
1235
1236         if (!ah->curchan)
1237                 ah->curchan = ath9k_cmn_get_curchannel(hw, ah);
1238
1239         ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
1240         ath9k_hw_phy_disable(ah);
1241
1242         ath9k_hw_configpcipowersave(ah, true);
1243
1244         spin_unlock_bh(&sc->sc_pcu_lock);
1245
1246         ath9k_ps_restore(sc);
1247
1248         sc->sc_flags |= SC_OP_INVALID;
1249         sc->ps_idle = prev_idle;
1250
1251         mutex_unlock(&sc->mutex);
1252
1253         ath_dbg(common, CONFIG, "Driver halt\n");
1254 }
1255
1256 bool ath9k_uses_beacons(int type)
1257 {
1258         switch (type) {
1259         case NL80211_IFTYPE_AP:
1260         case NL80211_IFTYPE_ADHOC:
1261         case NL80211_IFTYPE_MESH_POINT:
1262                 return true;
1263         default:
1264                 return false;
1265         }
1266 }
1267
1268 static void ath9k_reclaim_beacon(struct ath_softc *sc,
1269                                  struct ieee80211_vif *vif)
1270 {
1271         struct ath_vif *avp = (void *)vif->drv_priv;
1272
1273         ath9k_set_beaconing_status(sc, false);
1274         ath_beacon_return(sc, avp);
1275         ath9k_set_beaconing_status(sc, true);
1276         sc->sc_flags &= ~SC_OP_BEACONS;
1277 }
1278
1279 static void ath9k_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1280 {
1281         struct ath9k_vif_iter_data *iter_data = data;
1282         int i;
1283
1284         if (iter_data->hw_macaddr)
1285                 for (i = 0; i < ETH_ALEN; i++)
1286                         iter_data->mask[i] &=
1287                                 ~(iter_data->hw_macaddr[i] ^ mac[i]);
1288
1289         switch (vif->type) {
1290         case NL80211_IFTYPE_AP:
1291                 iter_data->naps++;
1292                 break;
1293         case NL80211_IFTYPE_STATION:
1294                 iter_data->nstations++;
1295                 break;
1296         case NL80211_IFTYPE_ADHOC:
1297                 iter_data->nadhocs++;
1298                 break;
1299         case NL80211_IFTYPE_MESH_POINT:
1300                 iter_data->nmeshes++;
1301                 break;
1302         case NL80211_IFTYPE_WDS:
1303                 iter_data->nwds++;
1304                 break;
1305         default:
1306                 iter_data->nothers++;
1307                 break;
1308         }
1309 }
1310
1311 /* Called with sc->mutex held. */
1312 void ath9k_calculate_iter_data(struct ieee80211_hw *hw,
1313                                struct ieee80211_vif *vif,
1314                                struct ath9k_vif_iter_data *iter_data)
1315 {
1316         struct ath_softc *sc = hw->priv;
1317         struct ath_hw *ah = sc->sc_ah;
1318         struct ath_common *common = ath9k_hw_common(ah);
1319
1320         /*
1321          * Use the hardware MAC address as reference, the hardware uses it
1322          * together with the BSSID mask when matching addresses.
1323          */
1324         memset(iter_data, 0, sizeof(*iter_data));
1325         iter_data->hw_macaddr = common->macaddr;
1326         memset(&iter_data->mask, 0xff, ETH_ALEN);
1327
1328         if (vif)
1329                 ath9k_vif_iter(iter_data, vif->addr, vif);
1330
1331         /* Get list of all active MAC addresses */
1332         ieee80211_iterate_active_interfaces_atomic(sc->hw, ath9k_vif_iter,
1333                                                    iter_data);
1334 }
1335
1336 /* Called with sc->mutex held. */
1337 static void ath9k_calculate_summary_state(struct ieee80211_hw *hw,
1338                                           struct ieee80211_vif *vif)
1339 {
1340         struct ath_softc *sc = hw->priv;
1341         struct ath_hw *ah = sc->sc_ah;
1342         struct ath_common *common = ath9k_hw_common(ah);
1343         struct ath9k_vif_iter_data iter_data;
1344
1345         ath9k_calculate_iter_data(hw, vif, &iter_data);
1346
1347         /* Set BSSID mask. */
1348         memcpy(common->bssidmask, iter_data.mask, ETH_ALEN);
1349         ath_hw_setbssidmask(common);
1350
1351         /* Set op-mode & TSF */
1352         if (iter_data.naps > 0) {
1353                 ath9k_hw_set_tsfadjust(ah, 1);
1354                 sc->sc_flags |= SC_OP_TSF_RESET;
1355                 ah->opmode = NL80211_IFTYPE_AP;
1356         } else {
1357                 ath9k_hw_set_tsfadjust(ah, 0);
1358                 sc->sc_flags &= ~SC_OP_TSF_RESET;
1359
1360                 if (iter_data.nmeshes)
1361                         ah->opmode = NL80211_IFTYPE_MESH_POINT;
1362                 else if (iter_data.nwds)
1363                         ah->opmode = NL80211_IFTYPE_AP;
1364                 else if (iter_data.nadhocs)
1365                         ah->opmode = NL80211_IFTYPE_ADHOC;
1366                 else
1367                         ah->opmode = NL80211_IFTYPE_STATION;
1368         }
1369
1370         /*
1371          * Enable MIB interrupts when there are hardware phy counters.
1372          */
1373         if ((iter_data.nstations + iter_data.nadhocs + iter_data.nmeshes) > 0) {
1374                 if (ah->config.enable_ani)
1375                         ah->imask |= ATH9K_INT_MIB;
1376                 ah->imask |= ATH9K_INT_TSFOOR;
1377         } else {
1378                 ah->imask &= ~ATH9K_INT_MIB;
1379                 ah->imask &= ~ATH9K_INT_TSFOOR;
1380         }
1381
1382         ath9k_hw_set_interrupts(ah);
1383
1384         /* Set up ANI */
1385         if (iter_data.naps > 0) {
1386                 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
1387
1388                 if (!common->disable_ani) {
1389                         sc->sc_flags |= SC_OP_ANI_RUN;
1390                         ath_start_ani(common);
1391                 }
1392
1393         } else {
1394                 sc->sc_flags &= ~SC_OP_ANI_RUN;
1395                 del_timer_sync(&common->ani.timer);
1396         }
1397 }
1398
1399 /* Called with sc->mutex held, vif counts set up properly. */
1400 static void ath9k_do_vif_add_setup(struct ieee80211_hw *hw,
1401                                    struct ieee80211_vif *vif)
1402 {
1403         struct ath_softc *sc = hw->priv;
1404
1405         ath9k_calculate_summary_state(hw, vif);
1406
1407         if (ath9k_uses_beacons(vif->type)) {
1408                 int error;
1409                 /* This may fail because upper levels do not have beacons
1410                  * properly configured yet.  That's OK, we assume it
1411                  * will be properly configured and then we will be notified
1412                  * in the info_changed method and set up beacons properly
1413                  * there.
1414                  */
1415                 ath9k_set_beaconing_status(sc, false);
1416                 error = ath_beacon_alloc(sc, vif);
1417                 if (!error)
1418                         ath_beacon_config(sc, vif);
1419                 ath9k_set_beaconing_status(sc, true);
1420         }
1421 }
1422
1423
1424 static int ath9k_add_interface(struct ieee80211_hw *hw,
1425                                struct ieee80211_vif *vif)
1426 {
1427         struct ath_softc *sc = hw->priv;
1428         struct ath_hw *ah = sc->sc_ah;
1429         struct ath_common *common = ath9k_hw_common(ah);
1430         int ret = 0;
1431
1432         ath9k_ps_wakeup(sc);
1433         mutex_lock(&sc->mutex);
1434
1435         switch (vif->type) {
1436         case NL80211_IFTYPE_STATION:
1437         case NL80211_IFTYPE_WDS:
1438         case NL80211_IFTYPE_ADHOC:
1439         case NL80211_IFTYPE_AP:
1440         case NL80211_IFTYPE_MESH_POINT:
1441                 break;
1442         default:
1443                 ath_err(common, "Interface type %d not yet supported\n",
1444                         vif->type);
1445                 ret = -EOPNOTSUPP;
1446                 goto out;
1447         }
1448
1449         if (ath9k_uses_beacons(vif->type)) {
1450                 if (sc->nbcnvifs >= ATH_BCBUF) {
1451                         ath_err(common, "Not enough beacon buffers when adding"
1452                                 " new interface of type: %i\n",
1453                                 vif->type);
1454                         ret = -ENOBUFS;
1455                         goto out;
1456                 }
1457         }
1458
1459         if ((ah->opmode == NL80211_IFTYPE_ADHOC) ||
1460             ((vif->type == NL80211_IFTYPE_ADHOC) &&
1461              sc->nvifs > 0)) {
1462                 ath_err(common, "Cannot create ADHOC interface when other"
1463                         " interfaces already exist.\n");
1464                 ret = -EINVAL;
1465                 goto out;
1466         }
1467
1468         ath_dbg(common, CONFIG, "Attach a VIF of type: %d\n", vif->type);
1469
1470         sc->nvifs++;
1471
1472         ath9k_do_vif_add_setup(hw, vif);
1473 out:
1474         mutex_unlock(&sc->mutex);
1475         ath9k_ps_restore(sc);
1476         return ret;
1477 }
1478
1479 static int ath9k_change_interface(struct ieee80211_hw *hw,
1480                                   struct ieee80211_vif *vif,
1481                                   enum nl80211_iftype new_type,
1482                                   bool p2p)
1483 {
1484         struct ath_softc *sc = hw->priv;
1485         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1486         int ret = 0;
1487
1488         ath_dbg(common, CONFIG, "Change Interface\n");
1489         mutex_lock(&sc->mutex);
1490         ath9k_ps_wakeup(sc);
1491
1492         /* See if new interface type is valid. */
1493         if ((new_type == NL80211_IFTYPE_ADHOC) &&
1494             (sc->nvifs > 1)) {
1495                 ath_err(common, "When using ADHOC, it must be the only"
1496                         " interface.\n");
1497                 ret = -EINVAL;
1498                 goto out;
1499         }
1500
1501         if (ath9k_uses_beacons(new_type) &&
1502             !ath9k_uses_beacons(vif->type)) {
1503                 if (sc->nbcnvifs >= ATH_BCBUF) {
1504                         ath_err(common, "No beacon slot available\n");
1505                         ret = -ENOBUFS;
1506                         goto out;
1507                 }
1508         }
1509
1510         /* Clean up old vif stuff */
1511         if (ath9k_uses_beacons(vif->type))
1512                 ath9k_reclaim_beacon(sc, vif);
1513
1514         /* Add new settings */
1515         vif->type = new_type;
1516         vif->p2p = p2p;
1517
1518         ath9k_do_vif_add_setup(hw, vif);
1519 out:
1520         ath9k_ps_restore(sc);
1521         mutex_unlock(&sc->mutex);
1522         return ret;
1523 }
1524
1525 static void ath9k_remove_interface(struct ieee80211_hw *hw,
1526                                    struct ieee80211_vif *vif)
1527 {
1528         struct ath_softc *sc = hw->priv;
1529         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1530
1531         ath_dbg(common, CONFIG, "Detach Interface\n");
1532
1533         ath9k_ps_wakeup(sc);
1534         mutex_lock(&sc->mutex);
1535
1536         sc->nvifs--;
1537
1538         /* Reclaim beacon resources */
1539         if (ath9k_uses_beacons(vif->type))
1540                 ath9k_reclaim_beacon(sc, vif);
1541
1542         ath9k_calculate_summary_state(hw, NULL);
1543
1544         mutex_unlock(&sc->mutex);
1545         ath9k_ps_restore(sc);
1546 }
1547
1548 static void ath9k_enable_ps(struct ath_softc *sc)
1549 {
1550         struct ath_hw *ah = sc->sc_ah;
1551
1552         sc->ps_enabled = true;
1553         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1554                 if ((ah->imask & ATH9K_INT_TIM_TIMER) == 0) {
1555                         ah->imask |= ATH9K_INT_TIM_TIMER;
1556                         ath9k_hw_set_interrupts(ah);
1557                 }
1558                 ath9k_hw_setrxabort(ah, 1);
1559         }
1560 }
1561
1562 static void ath9k_disable_ps(struct ath_softc *sc)
1563 {
1564         struct ath_hw *ah = sc->sc_ah;
1565
1566         sc->ps_enabled = false;
1567         ath9k_hw_setpower(ah, ATH9K_PM_AWAKE);
1568         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1569                 ath9k_hw_setrxabort(ah, 0);
1570                 sc->ps_flags &= ~(PS_WAIT_FOR_BEACON |
1571                                   PS_WAIT_FOR_CAB |
1572                                   PS_WAIT_FOR_PSPOLL_DATA |
1573                                   PS_WAIT_FOR_TX_ACK);
1574                 if (ah->imask & ATH9K_INT_TIM_TIMER) {
1575                         ah->imask &= ~ATH9K_INT_TIM_TIMER;
1576                         ath9k_hw_set_interrupts(ah);
1577                 }
1578         }
1579
1580 }
1581
1582 static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
1583 {
1584         struct ath_softc *sc = hw->priv;
1585         struct ath_hw *ah = sc->sc_ah;
1586         struct ath_common *common = ath9k_hw_common(ah);
1587         struct ieee80211_conf *conf = &hw->conf;
1588
1589         ath9k_ps_wakeup(sc);
1590         mutex_lock(&sc->mutex);
1591
1592         /*
1593          * Leave this as the first check because we need to turn on the
1594          * radio if it was disabled before prior to processing the rest
1595          * of the changes. Likewise we must only disable the radio towards
1596          * the end.
1597          */
1598         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
1599                 sc->ps_idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1600                 if (sc->ps_idle)
1601                         ath_cancel_work(sc);
1602         }
1603
1604         /*
1605          * We just prepare to enable PS. We have to wait until our AP has
1606          * ACK'd our null data frame to disable RX otherwise we'll ignore
1607          * those ACKs and end up retransmitting the same null data frames.
1608          * IEEE80211_CONF_CHANGE_PS is only passed by mac80211 for STA mode.
1609          */
1610         if (changed & IEEE80211_CONF_CHANGE_PS) {
1611                 unsigned long flags;
1612                 spin_lock_irqsave(&sc->sc_pm_lock, flags);
1613                 if (conf->flags & IEEE80211_CONF_PS)
1614                         ath9k_enable_ps(sc);
1615                 else
1616                         ath9k_disable_ps(sc);
1617                 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1618         }
1619
1620         if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
1621                 if (conf->flags & IEEE80211_CONF_MONITOR) {
1622                         ath_dbg(common, CONFIG, "Monitor mode is enabled\n");
1623                         sc->sc_ah->is_monitoring = true;
1624                 } else {
1625                         ath_dbg(common, CONFIG, "Monitor mode is disabled\n");
1626                         sc->sc_ah->is_monitoring = false;
1627                 }
1628         }
1629
1630         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1631                 struct ieee80211_channel *curchan = hw->conf.channel;
1632                 int pos = curchan->hw_value;
1633                 int old_pos = -1;
1634                 unsigned long flags;
1635
1636                 if (ah->curchan)
1637                         old_pos = ah->curchan - &ah->channels[0];
1638
1639                 if (hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)
1640                         sc->sc_flags |= SC_OP_OFFCHANNEL;
1641                 else
1642                         sc->sc_flags &= ~SC_OP_OFFCHANNEL;
1643
1644                 ath_dbg(common, CONFIG, "Set channel: %d MHz type: %d\n",
1645                         curchan->center_freq, conf->channel_type);
1646
1647                 /* update survey stats for the old channel before switching */
1648                 spin_lock_irqsave(&common->cc_lock, flags);
1649                 ath_update_survey_stats(sc);
1650                 spin_unlock_irqrestore(&common->cc_lock, flags);
1651
1652                 /*
1653                  * Preserve the current channel values, before updating
1654                  * the same channel
1655                  */
1656                 if (ah->curchan && (old_pos == pos))
1657                         ath9k_hw_getnf(ah, ah->curchan);
1658
1659                 ath9k_cmn_update_ichannel(&sc->sc_ah->channels[pos],
1660                                           curchan, conf->channel_type);
1661
1662                 /*
1663                  * If the operating channel changes, change the survey in-use flags
1664                  * along with it.
1665                  * Reset the survey data for the new channel, unless we're switching
1666                  * back to the operating channel from an off-channel operation.
1667                  */
1668                 if (!(hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) &&
1669                     sc->cur_survey != &sc->survey[pos]) {
1670
1671                         if (sc->cur_survey)
1672                                 sc->cur_survey->filled &= ~SURVEY_INFO_IN_USE;
1673
1674                         sc->cur_survey = &sc->survey[pos];
1675
1676                         memset(sc->cur_survey, 0, sizeof(struct survey_info));
1677                         sc->cur_survey->filled |= SURVEY_INFO_IN_USE;
1678                 } else if (!(sc->survey[pos].filled & SURVEY_INFO_IN_USE)) {
1679                         memset(&sc->survey[pos], 0, sizeof(struct survey_info));
1680                 }
1681
1682                 if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) {
1683                         ath_err(common, "Unable to set channel\n");
1684                         mutex_unlock(&sc->mutex);
1685                         return -EINVAL;
1686                 }
1687
1688                 /*
1689                  * The most recent snapshot of channel->noisefloor for the old
1690                  * channel is only available after the hardware reset. Copy it to
1691                  * the survey stats now.
1692                  */
1693                 if (old_pos >= 0)
1694                         ath_update_survey_nf(sc, old_pos);
1695         }
1696
1697         if (changed & IEEE80211_CONF_CHANGE_POWER) {
1698                 ath_dbg(common, CONFIG, "Set power: %d\n", conf->power_level);
1699                 sc->config.txpowlimit = 2 * conf->power_level;
1700                 ath9k_cmn_update_txpow(ah, sc->curtxpow,
1701                                        sc->config.txpowlimit, &sc->curtxpow);
1702         }
1703
1704         mutex_unlock(&sc->mutex);
1705         ath9k_ps_restore(sc);
1706
1707         return 0;
1708 }
1709
1710 #define SUPPORTED_FILTERS                       \
1711         (FIF_PROMISC_IN_BSS |                   \
1712         FIF_ALLMULTI |                          \
1713         FIF_CONTROL |                           \
1714         FIF_PSPOLL |                            \
1715         FIF_OTHER_BSS |                         \
1716         FIF_BCN_PRBRESP_PROMISC |               \
1717         FIF_PROBE_REQ |                         \
1718         FIF_FCSFAIL)
1719
1720 /* FIXME: sc->sc_full_reset ? */
1721 static void ath9k_configure_filter(struct ieee80211_hw *hw,
1722                                    unsigned int changed_flags,
1723                                    unsigned int *total_flags,
1724                                    u64 multicast)
1725 {
1726         struct ath_softc *sc = hw->priv;
1727         u32 rfilt;
1728
1729         changed_flags &= SUPPORTED_FILTERS;
1730         *total_flags &= SUPPORTED_FILTERS;
1731
1732         sc->rx.rxfilter = *total_flags;
1733         ath9k_ps_wakeup(sc);
1734         rfilt = ath_calcrxfilter(sc);
1735         ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1736         ath9k_ps_restore(sc);
1737
1738         ath_dbg(ath9k_hw_common(sc->sc_ah), CONFIG, "Set HW RX filter: 0x%x\n",
1739                 rfilt);
1740 }
1741
1742 static int ath9k_sta_add(struct ieee80211_hw *hw,
1743                          struct ieee80211_vif *vif,
1744                          struct ieee80211_sta *sta)
1745 {
1746         struct ath_softc *sc = hw->priv;
1747         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1748         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1749         struct ieee80211_key_conf ps_key = { };
1750
1751         ath_node_attach(sc, sta, vif);
1752
1753         if (vif->type != NL80211_IFTYPE_AP &&
1754             vif->type != NL80211_IFTYPE_AP_VLAN)
1755                 return 0;
1756
1757         an->ps_key = ath_key_config(common, vif, sta, &ps_key);
1758
1759         return 0;
1760 }
1761
1762 static void ath9k_del_ps_key(struct ath_softc *sc,
1763                              struct ieee80211_vif *vif,
1764                              struct ieee80211_sta *sta)
1765 {
1766         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1767         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1768         struct ieee80211_key_conf ps_key = { .hw_key_idx = an->ps_key };
1769
1770         if (!an->ps_key)
1771             return;
1772
1773         ath_key_delete(common, &ps_key);
1774 }
1775
1776 static int ath9k_sta_remove(struct ieee80211_hw *hw,
1777                             struct ieee80211_vif *vif,
1778                             struct ieee80211_sta *sta)
1779 {
1780         struct ath_softc *sc = hw->priv;
1781
1782         ath9k_del_ps_key(sc, vif, sta);
1783         ath_node_detach(sc, sta);
1784
1785         return 0;
1786 }
1787
1788 static void ath9k_sta_notify(struct ieee80211_hw *hw,
1789                          struct ieee80211_vif *vif,
1790                          enum sta_notify_cmd cmd,
1791                          struct ieee80211_sta *sta)
1792 {
1793         struct ath_softc *sc = hw->priv;
1794         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1795
1796         if (!(sc->sc_flags & SC_OP_TXAGGR))
1797                 return;
1798
1799         switch (cmd) {
1800         case STA_NOTIFY_SLEEP:
1801                 an->sleeping = true;
1802                 ath_tx_aggr_sleep(sta, sc, an);
1803                 break;
1804         case STA_NOTIFY_AWAKE:
1805                 an->sleeping = false;
1806                 ath_tx_aggr_wakeup(sc, an);
1807                 break;
1808         }
1809 }
1810
1811 static int ath9k_conf_tx(struct ieee80211_hw *hw,
1812                          struct ieee80211_vif *vif, u16 queue,
1813                          const struct ieee80211_tx_queue_params *params)
1814 {
1815         struct ath_softc *sc = hw->priv;
1816         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1817         struct ath_txq *txq;
1818         struct ath9k_tx_queue_info qi;
1819         int ret = 0;
1820
1821         if (queue >= WME_NUM_AC)
1822                 return 0;
1823
1824         txq = sc->tx.txq_map[queue];
1825
1826         ath9k_ps_wakeup(sc);
1827         mutex_lock(&sc->mutex);
1828
1829         memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
1830
1831         qi.tqi_aifs = params->aifs;
1832         qi.tqi_cwmin = params->cw_min;
1833         qi.tqi_cwmax = params->cw_max;
1834         qi.tqi_burstTime = params->txop;
1835
1836         ath_dbg(common, CONFIG,
1837                 "Configure tx [queue/halq] [%d/%d], aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
1838                 queue, txq->axq_qnum, params->aifs, params->cw_min,
1839                 params->cw_max, params->txop);
1840
1841         ret = ath_txq_update(sc, txq->axq_qnum, &qi);
1842         if (ret)
1843                 ath_err(common, "TXQ Update failed\n");
1844
1845         if (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC)
1846                 if (queue == WME_AC_BE && !ret)
1847                         ath_beaconq_config(sc);
1848
1849         mutex_unlock(&sc->mutex);
1850         ath9k_ps_restore(sc);
1851
1852         return ret;
1853 }
1854
1855 static int ath9k_set_key(struct ieee80211_hw *hw,
1856                          enum set_key_cmd cmd,
1857                          struct ieee80211_vif *vif,
1858                          struct ieee80211_sta *sta,
1859                          struct ieee80211_key_conf *key)
1860 {
1861         struct ath_softc *sc = hw->priv;
1862         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1863         int ret = 0;
1864
1865         if (ath9k_modparam_nohwcrypt)
1866                 return -ENOSPC;
1867
1868         if ((vif->type == NL80211_IFTYPE_ADHOC ||
1869              vif->type == NL80211_IFTYPE_MESH_POINT) &&
1870             (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
1871              key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
1872             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
1873                 /*
1874                  * For now, disable hw crypto for the RSN IBSS group keys. This
1875                  * could be optimized in the future to use a modified key cache
1876                  * design to support per-STA RX GTK, but until that gets
1877                  * implemented, use of software crypto for group addressed
1878                  * frames is a acceptable to allow RSN IBSS to be used.
1879                  */
1880                 return -EOPNOTSUPP;
1881         }
1882
1883         mutex_lock(&sc->mutex);
1884         ath9k_ps_wakeup(sc);
1885         ath_dbg(common, CONFIG, "Set HW Key\n");
1886
1887         switch (cmd) {
1888         case SET_KEY:
1889                 if (sta)
1890                         ath9k_del_ps_key(sc, vif, sta);
1891
1892                 ret = ath_key_config(common, vif, sta, key);
1893                 if (ret >= 0) {
1894                         key->hw_key_idx = ret;
1895                         /* push IV and Michael MIC generation to stack */
1896                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1897                         if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
1898                                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1899                         if (sc->sc_ah->sw_mgmt_crypto &&
1900                             key->cipher == WLAN_CIPHER_SUITE_CCMP)
1901                                 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT;
1902                         ret = 0;
1903                 }
1904                 break;
1905         case DISABLE_KEY:
1906                 ath_key_delete(common, key);
1907                 break;
1908         default:
1909                 ret = -EINVAL;
1910         }
1911
1912         ath9k_ps_restore(sc);
1913         mutex_unlock(&sc->mutex);
1914
1915         return ret;
1916 }
1917 static void ath9k_bss_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1918 {
1919         struct ath_softc *sc = data;
1920         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1921         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1922         struct ath_vif *avp = (void *)vif->drv_priv;
1923
1924         /*
1925          * Skip iteration if primary station vif's bss info
1926          * was not changed
1927          */
1928         if (sc->sc_flags & SC_OP_PRIM_STA_VIF)
1929                 return;
1930
1931         if (bss_conf->assoc) {
1932                 sc->sc_flags |= SC_OP_PRIM_STA_VIF;
1933                 avp->primary_sta_vif = true;
1934                 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1935                 common->curaid = bss_conf->aid;
1936                 ath9k_hw_write_associd(sc->sc_ah);
1937                 ath_dbg(common, CONFIG, "Bss Info ASSOC %d, bssid: %pM\n",
1938                         bss_conf->aid, common->curbssid);
1939                 ath_beacon_config(sc, vif);
1940                 /*
1941                  * Request a re-configuration of Beacon related timers
1942                  * on the receipt of the first Beacon frame (i.e.,
1943                  * after time sync with the AP).
1944                  */
1945                 sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
1946                 /* Reset rssi stats */
1947                 sc->last_rssi = ATH_RSSI_DUMMY_MARKER;
1948                 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
1949
1950                 if (!common->disable_ani) {
1951                         sc->sc_flags |= SC_OP_ANI_RUN;
1952                         ath_start_ani(common);
1953                 }
1954
1955         }
1956 }
1957
1958 static void ath9k_config_bss(struct ath_softc *sc, struct ieee80211_vif *vif)
1959 {
1960         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1961         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1962         struct ath_vif *avp = (void *)vif->drv_priv;
1963
1964         if (sc->sc_ah->opmode != NL80211_IFTYPE_STATION)
1965                 return;
1966
1967         /* Reconfigure bss info */
1968         if (avp->primary_sta_vif && !bss_conf->assoc) {
1969                 ath_dbg(common, CONFIG, "Bss Info DISASSOC %d, bssid %pM\n",
1970                         common->curaid, common->curbssid);
1971                 sc->sc_flags &= ~(SC_OP_PRIM_STA_VIF | SC_OP_BEACONS);
1972                 avp->primary_sta_vif = false;
1973                 memset(common->curbssid, 0, ETH_ALEN);
1974                 common->curaid = 0;
1975         }
1976
1977         ieee80211_iterate_active_interfaces_atomic(
1978                         sc->hw, ath9k_bss_iter, sc);
1979
1980         /*
1981          * None of station vifs are associated.
1982          * Clear bssid & aid
1983          */
1984         if (!(sc->sc_flags & SC_OP_PRIM_STA_VIF)) {
1985                 ath9k_hw_write_associd(sc->sc_ah);
1986                 /* Stop ANI */
1987                 sc->sc_flags &= ~SC_OP_ANI_RUN;
1988                 del_timer_sync(&common->ani.timer);
1989                 memset(&sc->caldata, 0, sizeof(sc->caldata));
1990         }
1991 }
1992
1993 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
1994                                    struct ieee80211_vif *vif,
1995                                    struct ieee80211_bss_conf *bss_conf,
1996                                    u32 changed)
1997 {
1998         struct ath_softc *sc = hw->priv;
1999         struct ath_hw *ah = sc->sc_ah;
2000         struct ath_common *common = ath9k_hw_common(ah);
2001         struct ath_vif *avp = (void *)vif->drv_priv;
2002         int slottime;
2003         int error;
2004
2005         ath9k_ps_wakeup(sc);
2006         mutex_lock(&sc->mutex);
2007
2008         if (changed & BSS_CHANGED_BSSID) {
2009                 ath9k_config_bss(sc, vif);
2010
2011                 ath_dbg(common, CONFIG, "BSSID: %pM aid: 0x%x\n",
2012                         common->curbssid, common->curaid);
2013         }
2014
2015         if (changed & BSS_CHANGED_IBSS) {
2016                 /* There can be only one vif available */
2017                 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
2018                 common->curaid = bss_conf->aid;
2019                 ath9k_hw_write_associd(sc->sc_ah);
2020
2021                 if (bss_conf->ibss_joined) {
2022                         sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
2023
2024                         if (!common->disable_ani) {
2025                                 sc->sc_flags |= SC_OP_ANI_RUN;
2026                                 ath_start_ani(common);
2027                         }
2028
2029                 } else {
2030                         sc->sc_flags &= ~SC_OP_ANI_RUN;
2031                         del_timer_sync(&common->ani.timer);
2032                 }
2033         }
2034
2035         /* Enable transmission of beacons (AP, IBSS, MESH) */
2036         if ((changed & BSS_CHANGED_BEACON) ||
2037             ((changed & BSS_CHANGED_BEACON_ENABLED) && bss_conf->enable_beacon)) {
2038                 ath9k_set_beaconing_status(sc, false);
2039                 error = ath_beacon_alloc(sc, vif);
2040                 if (!error)
2041                         ath_beacon_config(sc, vif);
2042                 ath9k_set_beaconing_status(sc, true);
2043         }
2044
2045         if (changed & BSS_CHANGED_ERP_SLOT) {
2046                 if (bss_conf->use_short_slot)
2047                         slottime = 9;
2048                 else
2049                         slottime = 20;
2050                 if (vif->type == NL80211_IFTYPE_AP) {
2051                         /*
2052                          * Defer update, so that connected stations can adjust
2053                          * their settings at the same time.
2054                          * See beacon.c for more details
2055                          */
2056                         sc->beacon.slottime = slottime;
2057                         sc->beacon.updateslot = UPDATE;
2058                 } else {
2059                         ah->slottime = slottime;
2060                         ath9k_hw_init_global_settings(ah);
2061                 }
2062         }
2063
2064         /* Disable transmission of beacons */
2065         if ((changed & BSS_CHANGED_BEACON_ENABLED) &&
2066             !bss_conf->enable_beacon) {
2067                 ath9k_set_beaconing_status(sc, false);
2068                 avp->is_bslot_active = false;
2069                 ath9k_set_beaconing_status(sc, true);
2070         }
2071
2072         if (changed & BSS_CHANGED_BEACON_INT) {
2073                 /*
2074                  * In case of AP mode, the HW TSF has to be reset
2075                  * when the beacon interval changes.
2076                  */
2077                 if (vif->type == NL80211_IFTYPE_AP) {
2078                         sc->sc_flags |= SC_OP_TSF_RESET;
2079                         ath9k_set_beaconing_status(sc, false);
2080                         error = ath_beacon_alloc(sc, vif);
2081                         if (!error)
2082                                 ath_beacon_config(sc, vif);
2083                         ath9k_set_beaconing_status(sc, true);
2084                 } else
2085                         ath_beacon_config(sc, vif);
2086         }
2087
2088         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
2089                 ath_dbg(common, CONFIG, "BSS Changed PREAMBLE %d\n",
2090                         bss_conf->use_short_preamble);
2091                 if (bss_conf->use_short_preamble)
2092                         sc->sc_flags |= SC_OP_PREAMBLE_SHORT;
2093                 else
2094                         sc->sc_flags &= ~SC_OP_PREAMBLE_SHORT;
2095         }
2096
2097         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
2098                 ath_dbg(common, CONFIG, "BSS Changed CTS PROT %d\n",
2099                         bss_conf->use_cts_prot);
2100                 if (bss_conf->use_cts_prot &&
2101                     hw->conf.channel->band != IEEE80211_BAND_5GHZ)
2102                         sc->sc_flags |= SC_OP_PROTECT_ENABLE;
2103                 else
2104                         sc->sc_flags &= ~SC_OP_PROTECT_ENABLE;
2105         }
2106
2107         mutex_unlock(&sc->mutex);
2108         ath9k_ps_restore(sc);
2109 }
2110
2111 static u64 ath9k_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
2112 {
2113         struct ath_softc *sc = hw->priv;
2114         u64 tsf;
2115
2116         mutex_lock(&sc->mutex);
2117         ath9k_ps_wakeup(sc);
2118         tsf = ath9k_hw_gettsf64(sc->sc_ah);
2119         ath9k_ps_restore(sc);
2120         mutex_unlock(&sc->mutex);
2121
2122         return tsf;
2123 }
2124
2125 static void ath9k_set_tsf(struct ieee80211_hw *hw,
2126                           struct ieee80211_vif *vif,
2127                           u64 tsf)
2128 {
2129         struct ath_softc *sc = hw->priv;
2130
2131         mutex_lock(&sc->mutex);
2132         ath9k_ps_wakeup(sc);
2133         ath9k_hw_settsf64(sc->sc_ah, tsf);
2134         ath9k_ps_restore(sc);
2135         mutex_unlock(&sc->mutex);
2136 }
2137
2138 static void ath9k_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
2139 {
2140         struct ath_softc *sc = hw->priv;
2141
2142         mutex_lock(&sc->mutex);
2143
2144         ath9k_ps_wakeup(sc);
2145         ath9k_hw_reset_tsf(sc->sc_ah);
2146         ath9k_ps_restore(sc);
2147
2148         mutex_unlock(&sc->mutex);
2149 }
2150
2151 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
2152                               struct ieee80211_vif *vif,
2153                               enum ieee80211_ampdu_mlme_action action,
2154                               struct ieee80211_sta *sta,
2155                               u16 tid, u16 *ssn, u8 buf_size)
2156 {
2157         struct ath_softc *sc = hw->priv;
2158         int ret = 0;
2159
2160         local_bh_disable();
2161
2162         switch (action) {
2163         case IEEE80211_AMPDU_RX_START:
2164                 if (!(sc->sc_flags & SC_OP_RXAGGR))
2165                         ret = -ENOTSUPP;
2166                 break;
2167         case IEEE80211_AMPDU_RX_STOP:
2168                 break;
2169         case IEEE80211_AMPDU_TX_START:
2170                 if (!(sc->sc_flags & SC_OP_TXAGGR))
2171                         return -EOPNOTSUPP;
2172
2173                 ath9k_ps_wakeup(sc);
2174                 ret = ath_tx_aggr_start(sc, sta, tid, ssn);
2175                 if (!ret)
2176                         ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2177                 ath9k_ps_restore(sc);
2178                 break;
2179         case IEEE80211_AMPDU_TX_STOP:
2180                 ath9k_ps_wakeup(sc);
2181                 ath_tx_aggr_stop(sc, sta, tid);
2182                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2183                 ath9k_ps_restore(sc);
2184                 break;
2185         case IEEE80211_AMPDU_TX_OPERATIONAL:
2186                 ath9k_ps_wakeup(sc);
2187                 ath_tx_aggr_resume(sc, sta, tid);
2188                 ath9k_ps_restore(sc);
2189                 break;
2190         default:
2191                 ath_err(ath9k_hw_common(sc->sc_ah), "Unknown AMPDU action\n");
2192         }
2193
2194         local_bh_enable();
2195
2196         return ret;
2197 }
2198
2199 static int ath9k_get_survey(struct ieee80211_hw *hw, int idx,
2200                              struct survey_info *survey)
2201 {
2202         struct ath_softc *sc = hw->priv;
2203         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2204         struct ieee80211_supported_band *sband;
2205         struct ieee80211_channel *chan;
2206         unsigned long flags;
2207         int pos;
2208
2209         spin_lock_irqsave(&common->cc_lock, flags);
2210         if (idx == 0)
2211                 ath_update_survey_stats(sc);
2212
2213         sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ];
2214         if (sband && idx >= sband->n_channels) {
2215                 idx -= sband->n_channels;
2216                 sband = NULL;
2217         }
2218
2219         if (!sband)
2220                 sband = hw->wiphy->bands[IEEE80211_BAND_5GHZ];
2221
2222         if (!sband || idx >= sband->n_channels) {
2223                 spin_unlock_irqrestore(&common->cc_lock, flags);
2224                 return -ENOENT;
2225         }
2226
2227         chan = &sband->channels[idx];
2228         pos = chan->hw_value;
2229         memcpy(survey, &sc->survey[pos], sizeof(*survey));
2230         survey->channel = chan;
2231         spin_unlock_irqrestore(&common->cc_lock, flags);
2232
2233         return 0;
2234 }
2235
2236 static void ath9k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
2237 {
2238         struct ath_softc *sc = hw->priv;
2239         struct ath_hw *ah = sc->sc_ah;
2240
2241         mutex_lock(&sc->mutex);
2242         ah->coverage_class = coverage_class;
2243
2244         ath9k_ps_wakeup(sc);
2245         ath9k_hw_init_global_settings(ah);
2246         ath9k_ps_restore(sc);
2247
2248         mutex_unlock(&sc->mutex);
2249 }
2250
2251 static void ath9k_flush(struct ieee80211_hw *hw, bool drop)
2252 {
2253         struct ath_softc *sc = hw->priv;
2254         struct ath_hw *ah = sc->sc_ah;
2255         struct ath_common *common = ath9k_hw_common(ah);
2256         int timeout = 200; /* ms */
2257         int i, j;
2258         bool drain_txq;
2259
2260         mutex_lock(&sc->mutex);
2261         cancel_delayed_work_sync(&sc->tx_complete_work);
2262
2263         if (ah->ah_flags & AH_UNPLUGGED) {
2264                 ath_dbg(common, ANY, "Device has been unplugged!\n");
2265                 mutex_unlock(&sc->mutex);
2266                 return;
2267         }
2268
2269         if (sc->sc_flags & SC_OP_INVALID) {
2270                 ath_dbg(common, ANY, "Device not present\n");
2271                 mutex_unlock(&sc->mutex);
2272                 return;
2273         }
2274
2275         for (j = 0; j < timeout; j++) {
2276                 bool npend = false;
2277
2278                 if (j)
2279                         usleep_range(1000, 2000);
2280
2281                 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
2282                         if (!ATH_TXQ_SETUP(sc, i))
2283                                 continue;
2284
2285                         npend = ath9k_has_pending_frames(sc, &sc->tx.txq[i]);
2286
2287                         if (npend)
2288                                 break;
2289                 }
2290
2291                 if (!npend)
2292                     break;
2293         }
2294
2295         if (drop) {
2296                 ath9k_ps_wakeup(sc);
2297                 spin_lock_bh(&sc->sc_pcu_lock);
2298                 drain_txq = ath_drain_all_txq(sc, false);
2299                 spin_unlock_bh(&sc->sc_pcu_lock);
2300
2301                 if (!drain_txq)
2302                         ath_reset(sc, false);
2303
2304                 ath9k_ps_restore(sc);
2305                 ieee80211_wake_queues(hw);
2306         }
2307
2308         ieee80211_queue_delayed_work(hw, &sc->tx_complete_work, 0);
2309         mutex_unlock(&sc->mutex);
2310 }
2311
2312 static bool ath9k_tx_frames_pending(struct ieee80211_hw *hw)
2313 {
2314         struct ath_softc *sc = hw->priv;
2315         int i;
2316
2317         for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
2318                 if (!ATH_TXQ_SETUP(sc, i))
2319                         continue;
2320
2321                 if (ath9k_has_pending_frames(sc, &sc->tx.txq[i]))
2322                         return true;
2323         }
2324         return false;
2325 }
2326
2327 static int ath9k_tx_last_beacon(struct ieee80211_hw *hw)
2328 {
2329         struct ath_softc *sc = hw->priv;
2330         struct ath_hw *ah = sc->sc_ah;
2331         struct ieee80211_vif *vif;
2332         struct ath_vif *avp;
2333         struct ath_buf *bf;
2334         struct ath_tx_status ts;
2335         int status;
2336
2337         vif = sc->beacon.bslot[0];
2338         if (!vif)
2339                 return 0;
2340
2341         avp = (void *)vif->drv_priv;
2342         if (!avp->is_bslot_active)
2343                 return 0;
2344
2345         if (!sc->beacon.tx_processed) {
2346                 tasklet_disable(&sc->bcon_tasklet);
2347
2348                 bf = avp->av_bcbuf;
2349                 if (!bf || !bf->bf_mpdu)
2350                         goto skip;
2351
2352                 status = ath9k_hw_txprocdesc(ah, bf->bf_desc, &ts);
2353                 if (status == -EINPROGRESS)
2354                         goto skip;
2355
2356                 sc->beacon.tx_processed = true;
2357                 sc->beacon.tx_last = !(ts.ts_status & ATH9K_TXERR_MASK);
2358
2359 skip:
2360                 tasklet_enable(&sc->bcon_tasklet);
2361         }
2362
2363         return sc->beacon.tx_last;
2364 }
2365
2366 static int ath9k_get_stats(struct ieee80211_hw *hw,
2367                            struct ieee80211_low_level_stats *stats)
2368 {
2369         struct ath_softc *sc = hw->priv;
2370         struct ath_hw *ah = sc->sc_ah;
2371         struct ath9k_mib_stats *mib_stats = &ah->ah_mibStats;
2372
2373         stats->dot11ACKFailureCount = mib_stats->ackrcv_bad;
2374         stats->dot11RTSFailureCount = mib_stats->rts_bad;
2375         stats->dot11FCSErrorCount = mib_stats->fcs_bad;
2376         stats->dot11RTSSuccessCount = mib_stats->rts_good;
2377         return 0;
2378 }
2379
2380 static u32 fill_chainmask(u32 cap, u32 new)
2381 {
2382         u32 filled = 0;
2383         int i;
2384
2385         for (i = 0; cap && new; i++, cap >>= 1) {
2386                 if (!(cap & BIT(0)))
2387                         continue;
2388
2389                 if (new & BIT(0))
2390                         filled |= BIT(i);
2391
2392                 new >>= 1;
2393         }
2394
2395         return filled;
2396 }
2397
2398 static int ath9k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
2399 {
2400         struct ath_softc *sc = hw->priv;
2401         struct ath_hw *ah = sc->sc_ah;
2402
2403         if (!rx_ant || !tx_ant)
2404                 return -EINVAL;
2405
2406         sc->ant_rx = rx_ant;
2407         sc->ant_tx = tx_ant;
2408
2409         if (ah->caps.rx_chainmask == 1)
2410                 return 0;
2411
2412         /* AR9100 runs into calibration issues if not all rx chains are enabled */
2413         if (AR_SREV_9100(ah))
2414                 ah->rxchainmask = 0x7;
2415         else
2416                 ah->rxchainmask = fill_chainmask(ah->caps.rx_chainmask, rx_ant);
2417
2418         ah->txchainmask = fill_chainmask(ah->caps.tx_chainmask, tx_ant);
2419         ath9k_reload_chainmask_settings(sc);
2420
2421         return 0;
2422 }
2423
2424 static int ath9k_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant)
2425 {
2426         struct ath_softc *sc = hw->priv;
2427
2428         *tx_ant = sc->ant_tx;
2429         *rx_ant = sc->ant_rx;
2430         return 0;
2431 }
2432
2433 struct ieee80211_ops ath9k_ops = {
2434         .tx                 = ath9k_tx,
2435         .start              = ath9k_start,
2436         .stop               = ath9k_stop,
2437         .add_interface      = ath9k_add_interface,
2438         .change_interface   = ath9k_change_interface,
2439         .remove_interface   = ath9k_remove_interface,
2440         .config             = ath9k_config,
2441         .configure_filter   = ath9k_configure_filter,
2442         .sta_add            = ath9k_sta_add,
2443         .sta_remove         = ath9k_sta_remove,
2444         .sta_notify         = ath9k_sta_notify,
2445         .conf_tx            = ath9k_conf_tx,
2446         .bss_info_changed   = ath9k_bss_info_changed,
2447         .set_key            = ath9k_set_key,
2448         .get_tsf            = ath9k_get_tsf,
2449         .set_tsf            = ath9k_set_tsf,
2450         .reset_tsf          = ath9k_reset_tsf,
2451         .ampdu_action       = ath9k_ampdu_action,
2452         .get_survey         = ath9k_get_survey,
2453         .rfkill_poll        = ath9k_rfkill_poll_state,
2454         .set_coverage_class = ath9k_set_coverage_class,
2455         .flush              = ath9k_flush,
2456         .tx_frames_pending  = ath9k_tx_frames_pending,
2457         .tx_last_beacon     = ath9k_tx_last_beacon,
2458         .get_stats          = ath9k_get_stats,
2459         .set_antenna        = ath9k_set_antenna,
2460         .get_antenna        = ath9k_get_antenna,
2461 };