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 (ath9k_hw_ops(ah)->antdiv_comb_conf_get && 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, ATH_DBG_CONFIG,
 343                 "Reset to %u MHz, HT40: %d fastcc: %d\n",
 344                 hchan->channel, !!(hchan->channelFlags & (CHANNEL_HT40MINUS |
 345                                                           CHANNEL_HT40PLUS)),
 346                 fastcc);
 347
 348         r = ath9k_hw_reset(ah, hchan, caldata, fastcc);
 349         if (r) {
 350                 ath_err(common,
 351                         "Unable to reset channel, reset status %d\n", r);
 352                 goto out;
 353         }
 354
 355         if (!ath_complete_reset(sc, true))
 356                 r = -EIO;
 357
 358 out:
 359         spin_unlock_bh(&sc->sc_pcu_lock);
 360         return r;
 361 }
 362
 363
 364 /*
 365  * Set/change channels.  If the channel is really being changed, it's done
 366  * by reseting the chip.  To accomplish this we must first cleanup any pending
 367  * DMA, then restart stuff.
 368 */
 369 static int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
 370                     struct ath9k_channel *hchan)
 371 {
 372         int r;
 373
 374         if (sc->sc_flags & SC_OP_INVALID)
 375                 return -EIO;
 376
 377         ath9k_ps_wakeup(sc);
 378
 379         r = ath_reset_internal(sc, hchan, false);
 380
 381         ath9k_ps_restore(sc);
 382
 383         return r;
 384 }
 385
 386 static void ath_paprd_activate(struct ath_softc *sc)
 387 {
 388         struct ath_hw *ah = sc->sc_ah;
 389         struct ath9k_hw_cal_data *caldata = ah->caldata;
 390         int chain;
 391
 392         if (!caldata || !caldata->paprd_done)
 393                 return;
 394
 395         ath9k_ps_wakeup(sc);
 396         ar9003_paprd_enable(ah, false);
 397         for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
 398                 if (!(ah->txchainmask & BIT(chain)))
 399                         continue;
 400
 401                 ar9003_paprd_populate_single_table(ah, caldata, chain);
 402         }
 403
 404         ar9003_paprd_enable(ah, true);
 405         ath9k_ps_restore(sc);
 406 }
 407
 408 static bool ath_paprd_send_frame(struct ath_softc *sc, struct sk_buff *skb, int chain)
 409 {
 410         struct ieee80211_hw *hw = sc->hw;
 411         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
 412         struct ath_hw *ah = sc->sc_ah;
 413         struct ath_common *common = ath9k_hw_common(ah);
 414         struct ath_tx_control txctl;
 415         int time_left;
 416
 417         memset(&txctl, 0, sizeof(txctl));
 418         txctl.txq = sc->tx.txq_map[WME_AC_BE];
 419
 420         memset(tx_info, 0, sizeof(*tx_info));
 421         tx_info->band = hw->conf.channel->band;
 422         tx_info->flags |= IEEE80211_TX_CTL_NO_ACK;
 423         tx_info->control.rates[0].idx = 0;
 424         tx_info->control.rates[0].count = 1;
 425         tx_info->control.rates[0].flags = IEEE80211_TX_RC_MCS;
 426         tx_info->control.rates[1].idx = -1;
 427
 428         init_completion(&sc->paprd_complete);
 429         txctl.paprd = BIT(chain);
 430
 431         if (ath_tx_start(hw, skb, &txctl) != 0) {
 432                 ath_dbg(common, ATH_DBG_CALIBRATE, "PAPRD TX failed\n");
 433                 dev_kfree_skb_any(skb);
 434                 return false;
 435         }
 436
 437         time_left = wait_for_completion_timeout(&sc->paprd_complete,
 438                         msecs_to_jiffies(ATH_PAPRD_TIMEOUT));
 439
 440         if (!time_left)
 441                 ath_dbg(common, ATH_DBG_CALIBRATE,
 442                         "Timeout waiting for paprd training on TX chain %d\n",
 443                         chain);
 444
 445         return !!time_left;
 446 }
 447
 448 void ath_paprd_calibrate(struct work_struct *work)
 449 {
 450         struct ath_softc *sc = container_of(work, struct ath_softc, paprd_work);
 451         struct ieee80211_hw *hw = sc->hw;
 452         struct ath_hw *ah = sc->sc_ah;
 453         struct ieee80211_hdr *hdr;
 454         struct sk_buff *skb = NULL;
 455         struct ath9k_hw_cal_data *caldata = ah->caldata;
 456         struct ath_common *common = ath9k_hw_common(ah);
 457         int ftype;
 458         int chain_ok = 0;
 459         int chain;
 460         int len = 1800;
 461
 462         if (!caldata)
 463                 return;
 464
 465         ath9k_ps_wakeup(sc);
 466
 467         if (ar9003_paprd_init_table(ah) < 0)
 468                 goto fail_paprd;
 469
 470         skb = alloc_skb(len, GFP_KERNEL);
 471         if (!skb)
 472                 goto fail_paprd;
 473
 474         skb_put(skb, len);
 475         memset(skb->data, 0, len);
 476         hdr = (struct ieee80211_hdr *)skb->data;
 477         ftype = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC;
 478         hdr->frame_control = cpu_to_le16(ftype);
 479         hdr->duration_id = cpu_to_le16(10);
 480         memcpy(hdr->addr1, hw->wiphy->perm_addr, ETH_ALEN);
 481         memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN);
 482         memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN);
 483
 484         for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
 485                 if (!(ah->txchainmask & BIT(chain)))
 486                         continue;
 487
 488                 chain_ok = 0;
 489
 490                 ath_dbg(common, ATH_DBG_CALIBRATE,
 491                         "Sending PAPRD frame for thermal measurement "
 492                         "on chain %d\n", chain);
 493                 if (!ath_paprd_send_frame(sc, skb, chain))
 494                         goto fail_paprd;
 495
 496                 ar9003_paprd_setup_gain_table(ah, chain);
 497
 498                 ath_dbg(common, ATH_DBG_CALIBRATE,
 499                         "Sending PAPRD training frame on chain %d\n", chain);
 500                 if (!ath_paprd_send_frame(sc, skb, chain))
 501                         goto fail_paprd;
 502
 503                 if (!ar9003_paprd_is_done(ah)) {
 504                         ath_dbg(common, ATH_DBG_CALIBRATE,
 505                                 "PAPRD not yet done on chain %d\n", chain);
 506                         break;
 507                 }
 508
 509                 if (ar9003_paprd_create_curve(ah, caldata, chain)) {
 510                         ath_dbg(common, ATH_DBG_CALIBRATE,
 511                                 "PAPRD create curve failed on chain %d\n",
 512                                                                    chain);
 513                         break;
 514                 }
 515
 516                 chain_ok = 1;
 517         }
 518         kfree_skb(skb);
 519
 520         if (chain_ok) {
 521                 caldata->paprd_done = true;
 522                 ath_paprd_activate(sc);
 523         }
 524
 525 fail_paprd:
 526         ath9k_ps_restore(sc);
 527 }
 528
 529 /*
 530  *  This routine performs the periodic noise floor calibration function
 531  *  that is used to adjust and optimize the chip performance.  This
 532  *  takes environmental changes (location, temperature) into account.
 533  *  When the task is complete, it reschedules itself depending on the
 534  *  appropriate interval that was calculated.
 535  */
 536 void ath_ani_calibrate(unsigned long data)
 537 {
 538         struct ath_softc *sc = (struct ath_softc *)data;
 539         struct ath_hw *ah = sc->sc_ah;
 540         struct ath_common *common = ath9k_hw_common(ah);
 541         bool longcal = false;
 542         bool shortcal = false;
 543         bool aniflag = false;
 544         unsigned int timestamp = jiffies_to_msecs(jiffies);
 545         u32 cal_interval, short_cal_interval, long_cal_interval;
 546         unsigned long flags;
 547
 548         if (ah->caldata && ah->caldata->nfcal_interference)
 549                 long_cal_interval = ATH_LONG_CALINTERVAL_INT;
 550         else
 551                 long_cal_interval = ATH_LONG_CALINTERVAL;
 552
 553         short_cal_interval = (ah->opmode == NL80211_IFTYPE_AP) ?
 554                 ATH_AP_SHORT_CALINTERVAL : ATH_STA_SHORT_CALINTERVAL;
 555
 556         /* Only calibrate if awake */
 557         if (sc->sc_ah->power_mode != ATH9K_PM_AWAKE)
 558                 goto set_timer;
 559
 560         ath9k_ps_wakeup(sc);
 561
 562         /* Long calibration runs independently of short calibration. */
 563         if ((timestamp - common->ani.longcal_timer) >= long_cal_interval) {
 564                 longcal = true;
 565                 ath_dbg(common, ATH_DBG_ANI, "longcal @%lu\n", jiffies);
 566                 common->ani.longcal_timer = timestamp;
 567         }
 568
 569         /* Short calibration applies only while caldone is false */
 570         if (!common->ani.caldone) {
 571                 if ((timestamp - common->ani.shortcal_timer) >= short_cal_interval) {
 572                         shortcal = true;
 573                         ath_dbg(common, ATH_DBG_ANI,
 574                                 "shortcal @%lu\n", jiffies);
 575                         common->ani.shortcal_timer = timestamp;
 576                         common->ani.resetcal_timer = timestamp;
 577                 }
 578         } else {
 579                 if ((timestamp - common->ani.resetcal_timer) >=
 580                     ATH_RESTART_CALINTERVAL) {
 581                         common->ani.caldone = ath9k_hw_reset_calvalid(ah);
 582                         if (common->ani.caldone)
 583                                 common->ani.resetcal_timer = timestamp;
 584                 }
 585         }
 586
 587         /* Verify whether we must check ANI */
 588         if ((timestamp - common->ani.checkani_timer) >=
 589              ah->config.ani_poll_interval) {
 590                 aniflag = true;
 591                 common->ani.checkani_timer = timestamp;
 592         }
 593
 594         /* Call ANI routine if necessary */
 595         if (aniflag) {
 596                 spin_lock_irqsave(&common->cc_lock, flags);
 597                 ath9k_hw_ani_monitor(ah, ah->curchan);
 598                 ath_update_survey_stats(sc);
 599                 spin_unlock_irqrestore(&common->cc_lock, flags);
 600         }
 601
 602         /* Perform calibration if necessary */
 603         if (longcal || shortcal) {
 604                 common->ani.caldone =
 605                         ath9k_hw_calibrate(ah, ah->curchan,
 606                                                 ah->rxchainmask, longcal);
 607         }
 608
 609         ath9k_ps_restore(sc);
 610
 611 set_timer:
 612         /*
 613         * Set timer interval based on previous results.
 614         * The interval must be the shortest necessary to satisfy ANI,
 615         * short calibration and long calibration.
 616         */
 617         ath9k_debug_samp_bb_mac(sc);
 618         cal_interval = ATH_LONG_CALINTERVAL;
 619         if (sc->sc_ah->config.enable_ani)
 620                 cal_interval = min(cal_interval,
 621                                    (u32)ah->config.ani_poll_interval);
 622         if (!common->ani.caldone)
 623                 cal_interval = min(cal_interval, (u32)short_cal_interval);
 624
 625         mod_timer(&common->ani.timer, jiffies + msecs_to_jiffies(cal_interval));
 626         if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_PAPRD) && ah->caldata) {
 627                 if (!ah->caldata->paprd_done)
 628                         ieee80211_queue_work(sc->hw, &sc->paprd_work);
 629                 else if (!ah->paprd_table_write_done)
 630                         ath_paprd_activate(sc);
 631         }
 632 }
 633
 634 static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta,
 635                             struct ieee80211_vif *vif)
 636 {
 637         struct ath_node *an;
 638         an = (struct ath_node *)sta->drv_priv;
 639
 640 #ifdef CONFIG_ATH9K_DEBUGFS
 641         spin_lock(&sc->nodes_lock);
 642         list_add(&an->list, &sc->nodes);
 643         spin_unlock(&sc->nodes_lock);
 644         an->sta = sta;
 645         an->vif = vif;
 646 #endif
 647         if (sc->sc_flags & SC_OP_TXAGGR) {
 648                 ath_tx_node_init(sc, an);
 649                 an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR +
 650                                      sta->ht_cap.ampdu_factor);
 651                 an->mpdudensity = parse_mpdudensity(sta->ht_cap.ampdu_density);
 652         }
 653 }
 654
 655 static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
 656 {
 657         struct ath_node *an = (struct ath_node *)sta->drv_priv;
 658
 659 #ifdef CONFIG_ATH9K_DEBUGFS
 660         spin_lock(&sc->nodes_lock);
 661         list_del(&an->list);
 662         spin_unlock(&sc->nodes_lock);
 663         an->sta = NULL;
 664 #endif
 665
 666         if (sc->sc_flags & SC_OP_TXAGGR)
 667                 ath_tx_node_cleanup(sc, an);
 668 }
 669
 670
 671 void ath9k_tasklet(unsigned long data)
 672 {
 673         struct ath_softc *sc = (struct ath_softc *)data;
 674         struct ath_hw *ah = sc->sc_ah;
 675         struct ath_common *common = ath9k_hw_common(ah);
 676
 677         u32 status = sc->intrstatus;
 678         u32 rxmask;
 679
 680         ath9k_ps_wakeup(sc);
 681         spin_lock(&sc->sc_pcu_lock);
 682
 683         if ((status & ATH9K_INT_FATAL) ||
 684             (status & ATH9K_INT_BB_WATCHDOG)) {
 685 #ifdef CONFIG_ATH9K_DEBUGFS
 686                 enum ath_reset_type type;
 687
 688                 if (status & ATH9K_INT_FATAL)
 689                         type = RESET_TYPE_FATAL_INT;
 690                 else
 691                         type = RESET_TYPE_BB_WATCHDOG;
 692
 693                 RESET_STAT_INC(sc, type);
 694 #endif
 695                 ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
 696                 goto out;
 697         }
 698
 699         /*
 700          * Only run the baseband hang check if beacons stop working in AP or
 701          * IBSS mode, because it has a high false positive rate. For station
 702          * mode it should not be necessary, since the upper layers will detect
 703          * this through a beacon miss automatically and the following channel
 704          * change will trigger a hardware reset anyway
 705          */
 706         if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0 &&
 707             !ath9k_hw_check_alive(ah))
 708                 ieee80211_queue_work(sc->hw, &sc->hw_check_work);
 709
 710         if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) {
 711                 /*
 712                  * TSF sync does not look correct; remain awake to sync with
 713                  * the next Beacon.
 714                  */
 715                 ath_dbg(common, ATH_DBG_PS,
 716                         "TSFOOR - Sync with next Beacon\n");
 717                 sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC;
 718         }
 719
 720         if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
 721                 rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL |
 722                           ATH9K_INT_RXORN);
 723         else
 724                 rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
 725
 726         if (status & rxmask) {
 727                 /* Check for high priority Rx first */
 728                 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
 729                     (status & ATH9K_INT_RXHP))
 730                         ath_rx_tasklet(sc, 0, true);
 731
 732                 ath_rx_tasklet(sc, 0, false);
 733         }
 734
 735         if (status & ATH9K_INT_TX) {
 736                 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
 737                         ath_tx_edma_tasklet(sc);
 738                 else
 739                         ath_tx_tasklet(sc);
 740         }
 741
 742         if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
 743                 if (status & ATH9K_INT_GENTIMER)
 744                         ath_gen_timer_isr(sc->sc_ah);
 745
 746         if (status & ATH9K_INT_MCI)
 747                 ath_mci_intr(sc);
 748
 749 out:
 750         /* re-enable hardware interrupt */
 751         ath9k_hw_enable_interrupts(ah);
 752
 753         spin_unlock(&sc->sc_pcu_lock);
 754         ath9k_ps_restore(sc);
 755 }
 756
 757 irqreturn_t ath_isr(int irq, void *dev)
 758 {
 759 #define SCHED_INTR (                            \
 760                 ATH9K_INT_FATAL |               \
 761                 ATH9K_INT_BB_WATCHDOG |         \
 762                 ATH9K_INT_RXORN |               \
 763                 ATH9K_INT_RXEOL |               \
 764                 ATH9K_INT_RX |                  \
 765                 ATH9K_INT_RXLP |                \
 766                 ATH9K_INT_RXHP |                \
 767                 ATH9K_INT_TX |                  \
 768                 ATH9K_INT_BMISS |               \
 769                 ATH9K_INT_CST |                 \
 770                 ATH9K_INT_TSFOOR |              \
 771                 ATH9K_INT_GENTIMER |            \
 772                 ATH9K_INT_MCI)
 773
 774         struct ath_softc *sc = dev;
 775         struct ath_hw *ah = sc->sc_ah;
 776         struct ath_common *common = ath9k_hw_common(ah);
 777         enum ath9k_int status;
 778         bool sched = false;
 779
 780         /*
 781          * The hardware is not ready/present, don't
 782          * touch anything. Note this can happen early
 783          * on if the IRQ is shared.
 784          */
 785         if (sc->sc_flags & SC_OP_INVALID)
 786                 return IRQ_NONE;
 787
 788
 789         /* shared irq, not for us */
 790
 791         if (!ath9k_hw_intrpend(ah))
 792                 return IRQ_NONE;
 793
 794         /*
 795          * Figure out the reason(s) for the interrupt.  Note
 796          * that the hal returns a pseudo-ISR that may include
 797          * bits we haven't explicitly enabled so we mask the
 798          * value to insure we only process bits we requested.
 799          */
 800         ath9k_hw_getisr(ah, &status);   /* NB: clears ISR too */
 801         status &= ah->imask;    /* discard unasked-for bits */
 802
 803         /*
 804          * If there are no status bits set, then this interrupt was not
 805          * for me (should have been caught above).
 806          */
 807         if (!status)
 808                 return IRQ_NONE;
 809
 810         /* Cache the status */
 811         sc->intrstatus = status;
 812
 813         if (status & SCHED_INTR)
 814                 sched = true;
 815
 816         /*
 817          * If a FATAL or RXORN interrupt is received, we have to reset the
 818          * chip immediately.
 819          */
 820         if ((status & ATH9K_INT_FATAL) || ((status & ATH9K_INT_RXORN) &&
 821             !(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)))
 822                 goto chip_reset;
 823
 824         if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
 825             (status & ATH9K_INT_BB_WATCHDOG)) {
 826
 827                 spin_lock(&common->cc_lock);
 828                 ath_hw_cycle_counters_update(common);
 829                 ar9003_hw_bb_watchdog_dbg_info(ah);
 830                 spin_unlock(&common->cc_lock);
 831
 832                 goto chip_reset;
 833         }
 834
 835         if (status & ATH9K_INT_SWBA)
 836                 tasklet_schedule(&sc->bcon_tasklet);
 837
 838         if (status & ATH9K_INT_TXURN)
 839                 ath9k_hw_updatetxtriglevel(ah, true);
 840
 841         if (status & ATH9K_INT_RXEOL) {
 842                 ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
 843                 ath9k_hw_set_interrupts(ah);
 844         }
 845
 846         if (status & ATH9K_INT_MIB) {
 847                 /*
 848                  * Disable interrupts until we service the MIB
 849                  * interrupt; otherwise it will continue to
 850                  * fire.
 851                  */
 852                 ath9k_hw_disable_interrupts(ah);
 853                 /*
 854                  * Let the hal handle the event. We assume
 855                  * it will clear whatever condition caused
 856                  * the interrupt.
 857                  */
 858                 spin_lock(&common->cc_lock);
 859                 ath9k_hw_proc_mib_event(ah);
 860                 spin_unlock(&common->cc_lock);
 861                 ath9k_hw_enable_interrupts(ah);
 862         }
 863
 864         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
 865                 if (status & ATH9K_INT_TIM_TIMER) {
 866                         if (ATH_DBG_WARN_ON_ONCE(sc->ps_idle))
 867                                 goto chip_reset;
 868                         /* Clear RxAbort bit so that we can
 869                          * receive frames */
 870                         ath9k_setpower(sc, ATH9K_PM_AWAKE);
 871                         ath9k_hw_setrxabort(sc->sc_ah, 0);
 872                         sc->ps_flags |= PS_WAIT_FOR_BEACON;
 873                 }
 874
 875 chip_reset:
 876
 877         ath_debug_stat_interrupt(sc, status);
 878
 879         if (sched) {
 880                 /* turn off every interrupt */
 881                 ath9k_hw_disable_interrupts(ah);
 882                 tasklet_schedule(&sc->intr_tq);
 883         }
 884
 885         return IRQ_HANDLED;
 886
 887 #undef SCHED_INTR
 888 }
 889
 890 static int ath_reset(struct ath_softc *sc, bool retry_tx)
 891 {
 892         int r;
 893
 894         ath9k_ps_wakeup(sc);
 895
 896         r = ath_reset_internal(sc, NULL, retry_tx);
 897
 898         if (retry_tx) {
 899                 int i;
 900                 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
 901                         if (ATH_TXQ_SETUP(sc, i)) {
 902                                 spin_lock_bh(&sc->tx.txq[i].axq_lock);
 903                                 ath_txq_schedule(sc, &sc->tx.txq[i]);
 904                                 spin_unlock_bh(&sc->tx.txq[i].axq_lock);
 905                         }
 906                 }
 907         }
 908
 909         ath9k_ps_restore(sc);
 910
 911         return r;
 912 }
 913
 914 void ath_reset_work(struct work_struct *work)
 915 {
 916         struct ath_softc *sc = container_of(work, struct ath_softc, hw_reset_work);
 917
 918         ath_reset(sc, true);
 919 }
 920
 921 void ath_hw_check(struct work_struct *work)
 922 {
 923         struct ath_softc *sc = container_of(work, struct ath_softc, hw_check_work);
 924         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 925         unsigned long flags;
 926         int busy;
 927
 928         ath9k_ps_wakeup(sc);
 929         if (ath9k_hw_check_alive(sc->sc_ah))
 930                 goto out;
 931
 932         spin_lock_irqsave(&common->cc_lock, flags);
 933         busy = ath_update_survey_stats(sc);
 934         spin_unlock_irqrestore(&common->cc_lock, flags);
 935
 936         ath_dbg(common, ATH_DBG_RESET, "Possible baseband hang, "
 937                 "busy=%d (try %d)\n", busy, sc->hw_busy_count + 1);
 938         if (busy >= 99) {
 939                 if (++sc->hw_busy_count >= 3) {
 940                         RESET_STAT_INC(sc, RESET_TYPE_BB_HANG);
 941                         ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
 942                 }
 943
 944         } else if (busy >= 0)
 945                 sc->hw_busy_count = 0;
 946
 947 out:
 948         ath9k_ps_restore(sc);
 949 }
 950
 951 static void ath_hw_pll_rx_hang_check(struct ath_softc *sc, u32 pll_sqsum)
 952 {
 953         static int count;
 954         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 955
 956         if (pll_sqsum >= 0x40000) {
 957                 count++;
 958                 if (count == 3) {
 959                         /* Rx is hung for more than 500ms. Reset it */
 960                         ath_dbg(common, ATH_DBG_RESET,
 961                                 "Possible RX hang, resetting");
 962                         RESET_STAT_INC(sc, RESET_TYPE_PLL_HANG);
 963                         ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
 964                         count = 0;
 965                 }
 966         } else
 967                 count = 0;
 968 }
 969
 970 void ath_hw_pll_work(struct work_struct *work)
 971 {
 972         struct ath_softc *sc = container_of(work, struct ath_softc,
 973                                             hw_pll_work.work);
 974         u32 pll_sqsum;
 975
 976         if (AR_SREV_9485(sc->sc_ah)) {
 977
 978                 ath9k_ps_wakeup(sc);
 979                 pll_sqsum = ar9003_get_pll_sqsum_dvc(sc->sc_ah);
 980                 ath9k_ps_restore(sc);
 981
 982                 ath_hw_pll_rx_hang_check(sc, pll_sqsum);
 983
 984                 ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/5);
 985         }
 986 }
 987
 988 /**********************/
 989 /* mac80211 callbacks */
 990 /**********************/
 991
 992 static int ath9k_start(struct ieee80211_hw *hw)
 993 {
 994         struct ath_softc *sc = hw->priv;
 995         struct ath_hw *ah = sc->sc_ah;
 996         struct ath_common *common = ath9k_hw_common(ah);
 997         struct ieee80211_channel *curchan = hw->conf.channel;
 998         struct ath9k_channel *init_channel;
 999         int r;
1000
1001         ath_dbg(common, ATH_DBG_CONFIG,
1002                 "Starting driver with initial channel: %d MHz\n",
1003                 curchan->center_freq);
1004
1005         ath9k_ps_wakeup(sc);
1006
1007         mutex_lock(&sc->mutex);
1008
1009         /* setup initial channel */
1010         sc->chan_idx = curchan->hw_value;
1011
1012         init_channel = ath9k_cmn_get_curchannel(hw, ah);
1013
1014         /* Reset SERDES registers */
1015         ath9k_hw_configpcipowersave(ah, false);
1016
1017         /*
1018          * The basic interface to setting the hardware in a good
1019          * state is ``reset''.  On return the hardware is known to
1020          * be powered up and with interrupts disabled.  This must
1021          * be followed by initialization of the appropriate bits
1022          * and then setup of the interrupt mask.
1023          */
1024         spin_lock_bh(&sc->sc_pcu_lock);
1025
1026         atomic_set(&ah->intr_ref_cnt, -1);
1027
1028         r = ath9k_hw_reset(ah, init_channel, ah->caldata, false);
1029         if (r) {
1030                 ath_err(common,
1031                         "Unable to reset hardware; reset status %d (freq %u MHz)\n",
1032                         r, curchan->center_freq);
1033                 spin_unlock_bh(&sc->sc_pcu_lock);
1034                 goto mutex_unlock;
1035         }
1036
1037         /* Setup our intr mask. */
1038         ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL |
1039                     ATH9K_INT_RXORN | ATH9K_INT_FATAL |
1040                     ATH9K_INT_GLOBAL;
1041
1042         if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
1043                 ah->imask |= ATH9K_INT_RXHP |
1044                              ATH9K_INT_RXLP |
1045                              ATH9K_INT_BB_WATCHDOG;
1046         else
1047                 ah->imask |= ATH9K_INT_RX;
1048
1049         ah->imask |= ATH9K_INT_GTT;
1050
1051         if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
1052                 ah->imask |= ATH9K_INT_CST;
1053
1054         if (ah->caps.hw_caps & ATH9K_HW_CAP_MCI)
1055                 ah->imask |= ATH9K_INT_MCI;
1056
1057         sc->sc_flags &= ~SC_OP_INVALID;
1058         sc->sc_ah->is_monitoring = false;
1059
1060         /* Disable BMISS interrupt when we're not associated */
1061         ah->imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
1062
1063         if (!ath_complete_reset(sc, false)) {
1064                 r = -EIO;
1065                 spin_unlock_bh(&sc->sc_pcu_lock);
1066                 goto mutex_unlock;
1067         }
1068
1069         if (ah->led_pin >= 0) {
1070                 ath9k_hw_cfg_output(ah, ah->led_pin,
1071                                     AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
1072                 ath9k_hw_set_gpio(ah, ah->led_pin, 0);
1073         }
1074
1075         /*
1076          * Reset key cache to sane defaults (all entries cleared) instead of
1077          * semi-random values after suspend/resume.
1078          */
1079         ath9k_cmn_init_crypto(sc->sc_ah);
1080
1081         spin_unlock_bh(&sc->sc_pcu_lock);
1082
1083         if ((ah->btcoex_hw.scheme != ATH_BTCOEX_CFG_NONE) &&
1084             !ah->btcoex_hw.enabled) {
1085                 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI))
1086                         ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
1087                                                    AR_STOMP_LOW_WLAN_WGHT);
1088                 ath9k_hw_btcoex_enable(ah);
1089
1090                 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
1091                         ath9k_btcoex_timer_resume(sc);
1092         }
1093
1094         if (ah->caps.pcie_lcr_extsync_en && common->bus_ops->extn_synch_en)
1095                 common->bus_ops->extn_synch_en(common);
1096
1097 mutex_unlock:
1098         mutex_unlock(&sc->mutex);
1099
1100         ath9k_ps_restore(sc);
1101
1102         return r;
1103 }
1104
1105 static void ath9k_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
1106 {
1107         struct ath_softc *sc = hw->priv;
1108         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1109         struct ath_tx_control txctl;
1110         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1111
1112         if (sc->ps_enabled) {
1113                 /*
1114                  * mac80211 does not set PM field for normal data frames, so we
1115                  * need to update that based on the current PS mode.
1116                  */
1117                 if (ieee80211_is_data(hdr->frame_control) &&
1118                     !ieee80211_is_nullfunc(hdr->frame_control) &&
1119                     !ieee80211_has_pm(hdr->frame_control)) {
1120                         ath_dbg(common, ATH_DBG_PS,
1121                                 "Add PM=1 for a TX frame while in PS mode\n");
1122                         hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1123                 }
1124         }
1125
1126         /*
1127          * Cannot tx while the hardware is in full sleep, it first needs a full
1128          * chip reset to recover from that
1129          */
1130         if (unlikely(sc->sc_ah->power_mode == ATH9K_PM_FULL_SLEEP))
1131                 goto exit;
1132
1133         if (unlikely(sc->sc_ah->power_mode != ATH9K_PM_AWAKE)) {
1134                 /*
1135                  * We are using PS-Poll and mac80211 can request TX while in
1136                  * power save mode. Need to wake up hardware for the TX to be
1137                  * completed and if needed, also for RX of buffered frames.
1138                  */
1139                 ath9k_ps_wakeup(sc);
1140                 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
1141                         ath9k_hw_setrxabort(sc->sc_ah, 0);
1142                 if (ieee80211_is_pspoll(hdr->frame_control)) {
1143                         ath_dbg(common, ATH_DBG_PS,
1144                                 "Sending PS-Poll to pick a buffered frame\n");
1145                         sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA;
1146                 } else {
1147                         ath_dbg(common, ATH_DBG_PS,
1148                                 "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, ATH_DBG_XMIT, "transmitting packet, skb: %p\n", skb);
1163
1164         if (ath_tx_start(hw, skb, &txctl) != 0) {
1165                 ath_dbg(common, ATH_DBG_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, ATH_DBG_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_btcoex_disable(ah);
1196                 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
1197                         ath9k_btcoex_timer_pause(sc);
1198                 ath_mci_flush_profile(&sc->btcoex.mci);
1199         }
1200
1201         spin_lock_bh(&sc->sc_pcu_lock);
1202
1203         /* prevent tasklets to enable interrupts once we disable them */
1204         ah->imask &= ~ATH9K_INT_GLOBAL;
1205
1206         /* make sure h/w will not generate any interrupt
1207          * before setting the invalid flag. */
1208         ath9k_hw_disable_interrupts(ah);
1209
1210         spin_unlock_bh(&sc->sc_pcu_lock);
1211
1212         /* we can now sync irq and kill any running tasklets, since we already
1213          * disabled interrupts and not holding a spin lock */
1214         synchronize_irq(sc->irq);
1215         tasklet_kill(&sc->intr_tq);
1216         tasklet_kill(&sc->bcon_tasklet);
1217
1218         prev_idle = sc->ps_idle;
1219         sc->ps_idle = true;
1220
1221         spin_lock_bh(&sc->sc_pcu_lock);
1222
1223         if (ah->led_pin >= 0) {
1224                 ath9k_hw_set_gpio(ah, ah->led_pin, 1);
1225                 ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
1226         }
1227
1228         ath_prepare_reset(sc, false, true);
1229
1230         if (sc->rx.frag) {
1231                 dev_kfree_skb_any(sc->rx.frag);
1232                 sc->rx.frag = NULL;
1233         }
1234
1235         if (!ah->curchan)
1236                 ah->curchan = ath9k_cmn_get_curchannel(hw, ah);
1237
1238         ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
1239         ath9k_hw_phy_disable(ah);
1240
1241         ath9k_hw_configpcipowersave(ah, true);
1242
1243         spin_unlock_bh(&sc->sc_pcu_lock);
1244
1245         ath9k_ps_restore(sc);
1246
1247         sc->sc_flags |= SC_OP_INVALID;
1248         sc->ps_idle = prev_idle;
1249
1250         mutex_unlock(&sc->mutex);
1251
1252         ath_dbg(common, ATH_DBG_CONFIG, "Driver halt\n");
1253 }
1254
1255 bool ath9k_uses_beacons(int type)
1256 {
1257         switch (type) {
1258         case NL80211_IFTYPE_AP:
1259         case NL80211_IFTYPE_ADHOC:
1260         case NL80211_IFTYPE_MESH_POINT:
1261                 return true;
1262         default:
1263                 return false;
1264         }
1265 }
1266
1267 static void ath9k_reclaim_beacon(struct ath_softc *sc,
1268                                  struct ieee80211_vif *vif)
1269 {
1270         struct ath_vif *avp = (void *)vif->drv_priv;
1271
1272         ath9k_set_beaconing_status(sc, false);
1273         ath_beacon_return(sc, avp);
1274         ath9k_set_beaconing_status(sc, true);
1275         sc->sc_flags &= ~SC_OP_BEACONS;
1276 }
1277
1278 static void ath9k_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1279 {
1280         struct ath9k_vif_iter_data *iter_data = data;
1281         int i;
1282
1283         if (iter_data->hw_macaddr)
1284                 for (i = 0; i < ETH_ALEN; i++)
1285                         iter_data->mask[i] &=
1286                                 ~(iter_data->hw_macaddr[i] ^ mac[i]);
1287
1288         switch (vif->type) {
1289         case NL80211_IFTYPE_AP:
1290                 iter_data->naps++;
1291                 break;
1292         case NL80211_IFTYPE_STATION:
1293                 iter_data->nstations++;
1294                 break;
1295         case NL80211_IFTYPE_ADHOC:
1296                 iter_data->nadhocs++;
1297                 break;
1298         case NL80211_IFTYPE_MESH_POINT:
1299                 iter_data->nmeshes++;
1300                 break;
1301         case NL80211_IFTYPE_WDS:
1302                 iter_data->nwds++;
1303                 break;
1304         default:
1305                 iter_data->nothers++;
1306                 break;
1307         }
1308 }
1309
1310 /* Called with sc->mutex held. */
1311 void ath9k_calculate_iter_data(struct ieee80211_hw *hw,
1312                                struct ieee80211_vif *vif,
1313                                struct ath9k_vif_iter_data *iter_data)
1314 {
1315         struct ath_softc *sc = hw->priv;
1316         struct ath_hw *ah = sc->sc_ah;
1317         struct ath_common *common = ath9k_hw_common(ah);
1318
1319         /*
1320          * Use the hardware MAC address as reference, the hardware uses it
1321          * together with the BSSID mask when matching addresses.
1322          */
1323         memset(iter_data, 0, sizeof(*iter_data));
1324         iter_data->hw_macaddr = common->macaddr;
1325         memset(&iter_data->mask, 0xff, ETH_ALEN);
1326
1327         if (vif)
1328                 ath9k_vif_iter(iter_data, vif->addr, vif);
1329
1330         /* Get list of all active MAC addresses */
1331         ieee80211_iterate_active_interfaces_atomic(sc->hw, ath9k_vif_iter,
1332                                                    iter_data);
1333 }
1334
1335 /* Called with sc->mutex held. */
1336 static void ath9k_calculate_summary_state(struct ieee80211_hw *hw,
1337                                           struct ieee80211_vif *vif)
1338 {
1339         struct ath_softc *sc = hw->priv;
1340         struct ath_hw *ah = sc->sc_ah;
1341         struct ath_common *common = ath9k_hw_common(ah);
1342         struct ath9k_vif_iter_data iter_data;
1343
1344         ath9k_calculate_iter_data(hw, vif, &iter_data);
1345
1346         /* Set BSSID mask. */
1347         memcpy(common->bssidmask, iter_data.mask, ETH_ALEN);
1348         ath_hw_setbssidmask(common);
1349
1350         /* Set op-mode & TSF */
1351         if (iter_data.naps > 0) {
1352                 ath9k_hw_set_tsfadjust(ah, 1);
1353                 sc->sc_flags |= SC_OP_TSF_RESET;
1354                 ah->opmode = NL80211_IFTYPE_AP;
1355         } else {
1356                 ath9k_hw_set_tsfadjust(ah, 0);
1357                 sc->sc_flags &= ~SC_OP_TSF_RESET;
1358
1359                 if (iter_data.nmeshes)
1360                         ah->opmode = NL80211_IFTYPE_MESH_POINT;
1361                 else if (iter_data.nwds)
1362                         ah->opmode = NL80211_IFTYPE_AP;
1363                 else if (iter_data.nadhocs)
1364                         ah->opmode = NL80211_IFTYPE_ADHOC;
1365                 else
1366                         ah->opmode = NL80211_IFTYPE_STATION;
1367         }
1368
1369         /*
1370          * Enable MIB interrupts when there are hardware phy counters.
1371          */
1372         if ((iter_data.nstations + iter_data.nadhocs + iter_data.nmeshes) > 0) {
1373                 if (ah->config.enable_ani)
1374                         ah->imask |= ATH9K_INT_MIB;
1375                 ah->imask |= ATH9K_INT_TSFOOR;
1376         } else {
1377                 ah->imask &= ~ATH9K_INT_MIB;
1378                 ah->imask &= ~ATH9K_INT_TSFOOR;
1379         }
1380
1381         ath9k_hw_set_interrupts(ah);
1382
1383         /* Set up ANI */
1384         if (iter_data.naps > 0) {
1385                 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
1386
1387                 if (!common->disable_ani) {
1388                         sc->sc_flags |= SC_OP_ANI_RUN;
1389                         ath_start_ani(common);
1390                 }
1391
1392         } else {
1393                 sc->sc_flags &= ~SC_OP_ANI_RUN;
1394                 del_timer_sync(&common->ani.timer);
1395         }
1396 }
1397
1398 /* Called with sc->mutex held, vif counts set up properly. */
1399 static void ath9k_do_vif_add_setup(struct ieee80211_hw *hw,
1400                                    struct ieee80211_vif *vif)
1401 {
1402         struct ath_softc *sc = hw->priv;
1403
1404         ath9k_calculate_summary_state(hw, vif);
1405
1406         if (ath9k_uses_beacons(vif->type)) {
1407                 int error;
1408                 /* This may fail because upper levels do not have beacons
1409                  * properly configured yet.  That's OK, we assume it
1410                  * will be properly configured and then we will be notified
1411                  * in the info_changed method and set up beacons properly
1412                  * there.
1413                  */
1414                 ath9k_set_beaconing_status(sc, false);
1415                 error = ath_beacon_alloc(sc, vif);
1416                 if (!error)
1417                         ath_beacon_config(sc, vif);
1418                 ath9k_set_beaconing_status(sc, true);
1419         }
1420 }
1421
1422
1423 static int ath9k_add_interface(struct ieee80211_hw *hw,
1424                                struct ieee80211_vif *vif)
1425 {
1426         struct ath_softc *sc = hw->priv;
1427         struct ath_hw *ah = sc->sc_ah;
1428         struct ath_common *common = ath9k_hw_common(ah);
1429         int ret = 0;
1430
1431         ath9k_ps_wakeup(sc);
1432         mutex_lock(&sc->mutex);
1433
1434         switch (vif->type) {
1435         case NL80211_IFTYPE_STATION:
1436         case NL80211_IFTYPE_WDS:
1437         case NL80211_IFTYPE_ADHOC:
1438         case NL80211_IFTYPE_AP:
1439         case NL80211_IFTYPE_MESH_POINT:
1440                 break;
1441         default:
1442                 ath_err(common, "Interface type %d not yet supported\n",
1443                         vif->type);
1444                 ret = -EOPNOTSUPP;
1445                 goto out;
1446         }
1447
1448         if (ath9k_uses_beacons(vif->type)) {
1449                 if (sc->nbcnvifs >= ATH_BCBUF) {
1450                         ath_err(common, "Not enough beacon buffers when adding"
1451                                 " new interface of type: %i\n",
1452                                 vif->type);
1453                         ret = -ENOBUFS;
1454                         goto out;
1455                 }
1456         }
1457
1458         if ((ah->opmode == NL80211_IFTYPE_ADHOC) ||
1459             ((vif->type == NL80211_IFTYPE_ADHOC) &&
1460              sc->nvifs > 0)) {
1461                 ath_err(common, "Cannot create ADHOC interface when other"
1462                         " interfaces already exist.\n");
1463                 ret = -EINVAL;
1464                 goto out;
1465         }
1466
1467         ath_dbg(common, ATH_DBG_CONFIG,
1468                 "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, ATH_DBG_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, ATH_DBG_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, ATH_DBG_CONFIG,
1623                                 "Monitor mode is enabled\n");
1624                         sc->sc_ah->is_monitoring = true;
1625                 } else {
1626                         ath_dbg(common, ATH_DBG_CONFIG,
1627                                 "Monitor mode is disabled\n");
1628                         sc->sc_ah->is_monitoring = false;
1629                 }
1630         }
1631
1632         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1633                 struct ieee80211_channel *curchan = hw->conf.channel;
1634                 struct ath9k_channel old_chan;
1635                 int pos = curchan->hw_value;
1636                 int old_pos = -1;
1637                 unsigned long flags;
1638
1639                 if (ah->curchan)
1640                         old_pos = ah->curchan - &ah->channels[0];
1641
1642                 if (hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)
1643                         sc->sc_flags |= SC_OP_OFFCHANNEL;
1644                 else
1645                         sc->sc_flags &= ~SC_OP_OFFCHANNEL;
1646
1647                 ath_dbg(common, ATH_DBG_CONFIG,
1648                         "Set channel: %d MHz type: %d\n",
1649                         curchan->center_freq, conf->channel_type);
1650
1651                 /* update survey stats for the old channel before switching */
1652                 spin_lock_irqsave(&common->cc_lock, flags);
1653                 ath_update_survey_stats(sc);
1654                 spin_unlock_irqrestore(&common->cc_lock, flags);
1655
1656                 /*
1657                  * Preserve the current channel values, before updating
1658                  * the same channel
1659                  */
1660                 if (old_pos == pos) {
1661                         memcpy(&old_chan, &sc->sc_ah->channels[pos],
1662                                 sizeof(struct ath9k_channel));
1663                         ah->curchan = &old_chan;
1664                 }
1665
1666                 ath9k_cmn_update_ichannel(&sc->sc_ah->channels[pos],
1667                                           curchan, conf->channel_type);
1668
1669                 /*
1670                  * If the operating channel changes, change the survey in-use flags
1671                  * along with it.
1672                  * Reset the survey data for the new channel, unless we're switching
1673                  * back to the operating channel from an off-channel operation.
1674                  */
1675                 if (!(hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) &&
1676                     sc->cur_survey != &sc->survey[pos]) {
1677
1678                         if (sc->cur_survey)
1679                                 sc->cur_survey->filled &= ~SURVEY_INFO_IN_USE;
1680
1681                         sc->cur_survey = &sc->survey[pos];
1682
1683                         memset(sc->cur_survey, 0, sizeof(struct survey_info));
1684                         sc->cur_survey->filled |= SURVEY_INFO_IN_USE;
1685                 } else if (!(sc->survey[pos].filled & SURVEY_INFO_IN_USE)) {
1686                         memset(&sc->survey[pos], 0, sizeof(struct survey_info));
1687                 }
1688
1689                 if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) {
1690                         ath_err(common, "Unable to set channel\n");
1691                         mutex_unlock(&sc->mutex);
1692                         return -EINVAL;
1693                 }
1694
1695                 /*
1696                  * The most recent snapshot of channel->noisefloor for the old
1697                  * channel is only available after the hardware reset. Copy it to
1698                  * the survey stats now.
1699                  */
1700                 if (old_pos >= 0)
1701                         ath_update_survey_nf(sc, old_pos);
1702         }
1703
1704         if (changed & IEEE80211_CONF_CHANGE_POWER) {
1705                 ath_dbg(common, ATH_DBG_CONFIG,
1706                         "Set power: %d\n", conf->power_level);
1707                 sc->config.txpowlimit = 2 * conf->power_level;
1708                 ath9k_cmn_update_txpow(ah, sc->curtxpow,
1709                                        sc->config.txpowlimit, &sc->curtxpow);
1710         }
1711
1712         mutex_unlock(&sc->mutex);
1713         ath9k_ps_restore(sc);
1714
1715         return 0;
1716 }
1717
1718 #define SUPPORTED_FILTERS                       \
1719         (FIF_PROMISC_IN_BSS |                   \
1720         FIF_ALLMULTI |                          \
1721         FIF_CONTROL |                           \
1722         FIF_PSPOLL |                            \
1723         FIF_OTHER_BSS |                         \
1724         FIF_BCN_PRBRESP_PROMISC |               \
1725         FIF_PROBE_REQ |                         \
1726         FIF_FCSFAIL)
1727
1728 /* FIXME: sc->sc_full_reset ? */
1729 static void ath9k_configure_filter(struct ieee80211_hw *hw,
1730                                    unsigned int changed_flags,
1731                                    unsigned int *total_flags,
1732                                    u64 multicast)
1733 {
1734         struct ath_softc *sc = hw->priv;
1735         u32 rfilt;
1736
1737         changed_flags &= SUPPORTED_FILTERS;
1738         *total_flags &= SUPPORTED_FILTERS;
1739
1740         sc->rx.rxfilter = *total_flags;
1741         ath9k_ps_wakeup(sc);
1742         rfilt = ath_calcrxfilter(sc);
1743         ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1744         ath9k_ps_restore(sc);
1745
1746         ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_CONFIG,
1747                 "Set HW RX filter: 0x%x\n", rfilt);
1748 }
1749
1750 static int ath9k_sta_add(struct ieee80211_hw *hw,
1751                          struct ieee80211_vif *vif,
1752                          struct ieee80211_sta *sta)
1753 {
1754         struct ath_softc *sc = hw->priv;
1755         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1756         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1757         struct ieee80211_key_conf ps_key = { };
1758
1759         ath_node_attach(sc, sta, vif);
1760
1761         if (vif->type != NL80211_IFTYPE_AP &&
1762             vif->type != NL80211_IFTYPE_AP_VLAN)
1763                 return 0;
1764
1765         an->ps_key = ath_key_config(common, vif, sta, &ps_key);
1766
1767         return 0;
1768 }
1769
1770 static void ath9k_del_ps_key(struct ath_softc *sc,
1771                              struct ieee80211_vif *vif,
1772                              struct ieee80211_sta *sta)
1773 {
1774         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1775         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1776         struct ieee80211_key_conf ps_key = { .hw_key_idx = an->ps_key };
1777
1778         if (!an->ps_key)
1779             return;
1780
1781         ath_key_delete(common, &ps_key);
1782 }
1783
1784 static int ath9k_sta_remove(struct ieee80211_hw *hw,
1785                             struct ieee80211_vif *vif,
1786                             struct ieee80211_sta *sta)
1787 {
1788         struct ath_softc *sc = hw->priv;
1789
1790         ath9k_del_ps_key(sc, vif, sta);
1791         ath_node_detach(sc, sta);
1792
1793         return 0;
1794 }
1795
1796 static void ath9k_sta_notify(struct ieee80211_hw *hw,
1797                          struct ieee80211_vif *vif,
1798                          enum sta_notify_cmd cmd,
1799                          struct ieee80211_sta *sta)
1800 {
1801         struct ath_softc *sc = hw->priv;
1802         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1803
1804         switch (cmd) {
1805         case STA_NOTIFY_SLEEP:
1806                 an->sleeping = true;
1807                 ath_tx_aggr_sleep(sta, sc, an);
1808                 break;
1809         case STA_NOTIFY_AWAKE:
1810                 an->sleeping = false;
1811                 ath_tx_aggr_wakeup(sc, an);
1812                 break;
1813         }
1814 }
1815
1816 static int ath9k_conf_tx(struct ieee80211_hw *hw,
1817                          struct ieee80211_vif *vif, u16 queue,
1818                          const struct ieee80211_tx_queue_params *params)
1819 {
1820         struct ath_softc *sc = hw->priv;
1821         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1822         struct ath_txq *txq;
1823         struct ath9k_tx_queue_info qi;
1824         int ret = 0;
1825
1826         if (queue >= WME_NUM_AC)
1827                 return 0;
1828
1829         txq = sc->tx.txq_map[queue];
1830
1831         ath9k_ps_wakeup(sc);
1832         mutex_lock(&sc->mutex);
1833
1834         memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
1835
1836         qi.tqi_aifs = params->aifs;
1837         qi.tqi_cwmin = params->cw_min;
1838         qi.tqi_cwmax = params->cw_max;
1839         qi.tqi_burstTime = params->txop;
1840
1841         ath_dbg(common, ATH_DBG_CONFIG,
1842                 "Configure tx [queue/halq] [%d/%d], aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
1843                 queue, txq->axq_qnum, params->aifs, params->cw_min,
1844                 params->cw_max, params->txop);
1845
1846         ret = ath_txq_update(sc, txq->axq_qnum, &qi);
1847         if (ret)
1848                 ath_err(common, "TXQ Update failed\n");
1849
1850         if (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC)
1851                 if (queue == WME_AC_BE && !ret)
1852                         ath_beaconq_config(sc);
1853
1854         mutex_unlock(&sc->mutex);
1855         ath9k_ps_restore(sc);
1856
1857         return ret;
1858 }
1859
1860 static int ath9k_set_key(struct ieee80211_hw *hw,
1861                          enum set_key_cmd cmd,
1862                          struct ieee80211_vif *vif,
1863                          struct ieee80211_sta *sta,
1864                          struct ieee80211_key_conf *key)
1865 {
1866         struct ath_softc *sc = hw->priv;
1867         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1868         int ret = 0;
1869
1870         if (ath9k_modparam_nohwcrypt)
1871                 return -ENOSPC;
1872
1873         if (vif->type == NL80211_IFTYPE_ADHOC &&
1874             (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
1875              key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
1876             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
1877                 /*
1878                  * For now, disable hw crypto for the RSN IBSS group keys. This
1879                  * could be optimized in the future to use a modified key cache
1880                  * design to support per-STA RX GTK, but until that gets
1881                  * implemented, use of software crypto for group addressed
1882                  * frames is a acceptable to allow RSN IBSS to be used.
1883                  */
1884                 return -EOPNOTSUPP;
1885         }
1886
1887         mutex_lock(&sc->mutex);
1888         ath9k_ps_wakeup(sc);
1889         ath_dbg(common, ATH_DBG_CONFIG, "Set HW Key\n");
1890
1891         switch (cmd) {
1892         case SET_KEY:
1893                 if (sta)
1894                         ath9k_del_ps_key(sc, vif, sta);
1895
1896                 ret = ath_key_config(common, vif, sta, key);
1897                 if (ret >= 0) {
1898                         key->hw_key_idx = ret;
1899                         /* push IV and Michael MIC generation to stack */
1900                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1901                         if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
1902                                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1903                         if (sc->sc_ah->sw_mgmt_crypto &&
1904                             key->cipher == WLAN_CIPHER_SUITE_CCMP)
1905                                 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT;
1906                         ret = 0;
1907                 }
1908                 break;
1909         case DISABLE_KEY:
1910                 ath_key_delete(common, key);
1911                 break;
1912         default:
1913                 ret = -EINVAL;
1914         }
1915
1916         ath9k_ps_restore(sc);
1917         mutex_unlock(&sc->mutex);
1918
1919         return ret;
1920 }
1921 static void ath9k_bss_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1922 {
1923         struct ath_softc *sc = data;
1924         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1925         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1926         struct ath_vif *avp = (void *)vif->drv_priv;
1927
1928         /*
1929          * Skip iteration if primary station vif's bss info
1930          * was not changed
1931          */
1932         if (sc->sc_flags & SC_OP_PRIM_STA_VIF)
1933                 return;
1934
1935         if (bss_conf->assoc) {
1936                 sc->sc_flags |= SC_OP_PRIM_STA_VIF;
1937                 avp->primary_sta_vif = true;
1938                 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1939                 common->curaid = bss_conf->aid;
1940                 ath9k_hw_write_associd(sc->sc_ah);
1941                 ath_dbg(common, ATH_DBG_CONFIG,
1942                                 "Bss Info ASSOC %d, bssid: %pM\n",
1943                                 bss_conf->aid, common->curbssid);
1944                 ath_beacon_config(sc, vif);
1945                 /*
1946                  * Request a re-configuration of Beacon related timers
1947                  * on the receipt of the first Beacon frame (i.e.,
1948                  * after time sync with the AP).
1949                  */
1950                 sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
1951                 /* Reset rssi stats */
1952                 sc->last_rssi = ATH_RSSI_DUMMY_MARKER;
1953                 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
1954
1955                 if (!common->disable_ani) {
1956                         sc->sc_flags |= SC_OP_ANI_RUN;
1957                         ath_start_ani(common);
1958                 }
1959
1960         }
1961 }
1962
1963 static void ath9k_config_bss(struct ath_softc *sc, struct ieee80211_vif *vif)
1964 {
1965         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1966         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1967         struct ath_vif *avp = (void *)vif->drv_priv;
1968
1969         if (sc->sc_ah->opmode != NL80211_IFTYPE_STATION)
1970                 return;
1971
1972         /* Reconfigure bss info */
1973         if (avp->primary_sta_vif && !bss_conf->assoc) {
1974                 ath_dbg(common, ATH_DBG_CONFIG,
1975                         "Bss Info DISASSOC %d, bssid %pM\n",
1976                         common->curaid, common->curbssid);
1977                 sc->sc_flags &= ~(SC_OP_PRIM_STA_VIF | SC_OP_BEACONS);
1978                 avp->primary_sta_vif = false;
1979                 memset(common->curbssid, 0, ETH_ALEN);
1980                 common->curaid = 0;
1981         }
1982
1983         ieee80211_iterate_active_interfaces_atomic(
1984                         sc->hw, ath9k_bss_iter, sc);
1985
1986         /*
1987          * None of station vifs are associated.
1988          * Clear bssid & aid
1989          */
1990         if (!(sc->sc_flags & SC_OP_PRIM_STA_VIF)) {
1991                 ath9k_hw_write_associd(sc->sc_ah);
1992                 /* Stop ANI */
1993                 sc->sc_flags &= ~SC_OP_ANI_RUN;
1994                 del_timer_sync(&common->ani.timer);
1995                 memset(&sc->caldata, 0, sizeof(sc->caldata));
1996         }
1997 }
1998
1999 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
2000                                    struct ieee80211_vif *vif,
2001                                    struct ieee80211_bss_conf *bss_conf,
2002                                    u32 changed)
2003 {
2004         struct ath_softc *sc = hw->priv;
2005         struct ath_hw *ah = sc->sc_ah;
2006         struct ath_common *common = ath9k_hw_common(ah);
2007         struct ath_vif *avp = (void *)vif->drv_priv;
2008         int slottime;
2009         int error;
2010
2011         ath9k_ps_wakeup(sc);
2012         mutex_lock(&sc->mutex);
2013
2014         if (changed & BSS_CHANGED_BSSID) {
2015                 ath9k_config_bss(sc, vif);
2016
2017                 ath_dbg(common, ATH_DBG_CONFIG, "BSSID: %pM aid: 0x%x\n",
2018                         common->curbssid, common->curaid);
2019         }
2020
2021         if (changed & BSS_CHANGED_IBSS) {
2022                 /* There can be only one vif available */
2023                 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
2024                 common->curaid = bss_conf->aid;
2025                 ath9k_hw_write_associd(sc->sc_ah);
2026
2027                 if (bss_conf->ibss_joined) {
2028                         sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
2029
2030                         if (!common->disable_ani) {
2031                                 sc->sc_flags |= SC_OP_ANI_RUN;
2032                                 ath_start_ani(common);
2033                         }
2034
2035                 } else {
2036                         sc->sc_flags &= ~SC_OP_ANI_RUN;
2037                         del_timer_sync(&common->ani.timer);
2038                 }
2039         }
2040
2041         /* Enable transmission of beacons (AP, IBSS, MESH) */
2042         if ((changed & BSS_CHANGED_BEACON) ||
2043             ((changed & BSS_CHANGED_BEACON_ENABLED) && bss_conf->enable_beacon)) {
2044                 ath9k_set_beaconing_status(sc, false);
2045                 error = ath_beacon_alloc(sc, vif);
2046                 if (!error)
2047                         ath_beacon_config(sc, vif);
2048                 ath9k_set_beaconing_status(sc, true);
2049         }
2050
2051         if (changed & BSS_CHANGED_ERP_SLOT) {
2052                 if (bss_conf->use_short_slot)
2053                         slottime = 9;
2054                 else
2055                         slottime = 20;
2056                 if (vif->type == NL80211_IFTYPE_AP) {
2057                         /*
2058                          * Defer update, so that connected stations can adjust
2059                          * their settings at the same time.
2060                          * See beacon.c for more details
2061                          */
2062                         sc->beacon.slottime = slottime;
2063                         sc->beacon.updateslot = UPDATE;
2064                 } else {
2065                         ah->slottime = slottime;
2066                         ath9k_hw_init_global_settings(ah);
2067                 }
2068         }
2069
2070         /* Disable transmission of beacons */
2071         if ((changed & BSS_CHANGED_BEACON_ENABLED) &&
2072             !bss_conf->enable_beacon) {
2073                 ath9k_set_beaconing_status(sc, false);
2074                 avp->is_bslot_active = false;
2075                 ath9k_set_beaconing_status(sc, true);
2076         }
2077
2078         if (changed & BSS_CHANGED_BEACON_INT) {
2079                 /*
2080                  * In case of AP mode, the HW TSF has to be reset
2081                  * when the beacon interval changes.
2082                  */
2083                 if (vif->type == NL80211_IFTYPE_AP) {
2084                         sc->sc_flags |= SC_OP_TSF_RESET;
2085                         ath9k_set_beaconing_status(sc, false);
2086                         error = ath_beacon_alloc(sc, vif);
2087                         if (!error)
2088                                 ath_beacon_config(sc, vif);
2089                         ath9k_set_beaconing_status(sc, true);
2090                 } else
2091                         ath_beacon_config(sc, vif);
2092         }
2093
2094         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
2095                 ath_dbg(common, ATH_DBG_CONFIG, "BSS Changed PREAMBLE %d\n",
2096                         bss_conf->use_short_preamble);
2097                 if (bss_conf->use_short_preamble)
2098                         sc->sc_flags |= SC_OP_PREAMBLE_SHORT;
2099                 else
2100                         sc->sc_flags &= ~SC_OP_PREAMBLE_SHORT;
2101         }
2102
2103         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
2104                 ath_dbg(common, ATH_DBG_CONFIG, "BSS Changed CTS PROT %d\n",
2105                         bss_conf->use_cts_prot);
2106                 if (bss_conf->use_cts_prot &&
2107                     hw->conf.channel->band != IEEE80211_BAND_5GHZ)
2108                         sc->sc_flags |= SC_OP_PROTECT_ENABLE;
2109                 else
2110                         sc->sc_flags &= ~SC_OP_PROTECT_ENABLE;
2111         }
2112
2113         mutex_unlock(&sc->mutex);
2114         ath9k_ps_restore(sc);
2115 }
2116
2117 static u64 ath9k_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
2118 {
2119         struct ath_softc *sc = hw->priv;
2120         u64 tsf;
2121
2122         mutex_lock(&sc->mutex);
2123         ath9k_ps_wakeup(sc);
2124         tsf = ath9k_hw_gettsf64(sc->sc_ah);
2125         ath9k_ps_restore(sc);
2126         mutex_unlock(&sc->mutex);
2127
2128         return tsf;
2129 }
2130
2131 static void ath9k_set_tsf(struct ieee80211_hw *hw,
2132                           struct ieee80211_vif *vif,
2133                           u64 tsf)
2134 {
2135         struct ath_softc *sc = hw->priv;
2136
2137         mutex_lock(&sc->mutex);
2138         ath9k_ps_wakeup(sc);
2139         ath9k_hw_settsf64(sc->sc_ah, tsf);
2140         ath9k_ps_restore(sc);
2141         mutex_unlock(&sc->mutex);
2142 }
2143
2144 static void ath9k_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
2145 {
2146         struct ath_softc *sc = hw->priv;
2147
2148         mutex_lock(&sc->mutex);
2149
2150         ath9k_ps_wakeup(sc);
2151         ath9k_hw_reset_tsf(sc->sc_ah);
2152         ath9k_ps_restore(sc);
2153
2154         mutex_unlock(&sc->mutex);
2155 }
2156
2157 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
2158                               struct ieee80211_vif *vif,
2159                               enum ieee80211_ampdu_mlme_action action,
2160                               struct ieee80211_sta *sta,
2161                               u16 tid, u16 *ssn, u8 buf_size)
2162 {
2163         struct ath_softc *sc = hw->priv;
2164         int ret = 0;
2165
2166         local_bh_disable();
2167
2168         switch (action) {
2169         case IEEE80211_AMPDU_RX_START:
2170                 if (!(sc->sc_flags & SC_OP_RXAGGR))
2171                         ret = -ENOTSUPP;
2172                 break;
2173         case IEEE80211_AMPDU_RX_STOP:
2174                 break;
2175         case IEEE80211_AMPDU_TX_START:
2176                 if (!(sc->sc_flags & SC_OP_TXAGGR))
2177                         return -EOPNOTSUPP;
2178
2179                 ath9k_ps_wakeup(sc);
2180                 ret = ath_tx_aggr_start(sc, sta, tid, ssn);
2181                 if (!ret)
2182                         ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2183                 ath9k_ps_restore(sc);
2184                 break;
2185         case IEEE80211_AMPDU_TX_STOP:
2186                 ath9k_ps_wakeup(sc);
2187                 ath_tx_aggr_stop(sc, sta, tid);
2188                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2189                 ath9k_ps_restore(sc);
2190                 break;
2191         case IEEE80211_AMPDU_TX_OPERATIONAL:
2192                 ath9k_ps_wakeup(sc);
2193                 ath_tx_aggr_resume(sc, sta, tid);
2194                 ath9k_ps_restore(sc);
2195                 break;
2196         default:
2197                 ath_err(ath9k_hw_common(sc->sc_ah), "Unknown AMPDU action\n");
2198         }
2199
2200         local_bh_enable();
2201
2202         return ret;
2203 }
2204
2205 static int ath9k_get_survey(struct ieee80211_hw *hw, int idx,
2206                              struct survey_info *survey)
2207 {
2208         struct ath_softc *sc = hw->priv;
2209         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2210         struct ieee80211_supported_band *sband;
2211         struct ieee80211_channel *chan;
2212         unsigned long flags;
2213         int pos;
2214
2215         spin_lock_irqsave(&common->cc_lock, flags);
2216         if (idx == 0)
2217                 ath_update_survey_stats(sc);
2218
2219         sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ];
2220         if (sband && idx >= sband->n_channels) {
2221                 idx -= sband->n_channels;
2222                 sband = NULL;
2223         }
2224
2225         if (!sband)
2226                 sband = hw->wiphy->bands[IEEE80211_BAND_5GHZ];
2227
2228         if (!sband || idx >= sband->n_channels) {
2229                 spin_unlock_irqrestore(&common->cc_lock, flags);
2230                 return -ENOENT;
2231         }
2232
2233         chan = &sband->channels[idx];
2234         pos = chan->hw_value;
2235         memcpy(survey, &sc->survey[pos], sizeof(*survey));
2236         survey->channel = chan;
2237         spin_unlock_irqrestore(&common->cc_lock, flags);
2238
2239         return 0;
2240 }
2241
2242 static void ath9k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
2243 {
2244         struct ath_softc *sc = hw->priv;
2245         struct ath_hw *ah = sc->sc_ah;
2246
2247         mutex_lock(&sc->mutex);
2248         ah->coverage_class = coverage_class;
2249
2250         ath9k_ps_wakeup(sc);
2251         ath9k_hw_init_global_settings(ah);
2252         ath9k_ps_restore(sc);
2253
2254         mutex_unlock(&sc->mutex);
2255 }
2256
2257 static void ath9k_flush(struct ieee80211_hw *hw, bool drop)
2258 {
2259         struct ath_softc *sc = hw->priv;
2260         struct ath_hw *ah = sc->sc_ah;
2261         struct ath_common *common = ath9k_hw_common(ah);
2262         int timeout = 200; /* ms */
2263         int i, j;
2264         bool drain_txq;
2265
2266         mutex_lock(&sc->mutex);
2267         cancel_delayed_work_sync(&sc->tx_complete_work);
2268
2269         if (ah->ah_flags & AH_UNPLUGGED) {
2270                 ath_dbg(common, ATH_DBG_ANY, "Device has been unplugged!\n");
2271                 mutex_unlock(&sc->mutex);
2272                 return;
2273         }
2274
2275         if (sc->sc_flags & SC_OP_INVALID) {
2276                 ath_dbg(common, ATH_DBG_ANY, "Device not present\n");
2277                 mutex_unlock(&sc->mutex);
2278                 return;
2279         }
2280
2281         for (j = 0; j < timeout; j++) {
2282                 bool npend = false;
2283
2284                 if (j)
2285                         usleep_range(1000, 2000);
2286
2287                 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
2288                         if (!ATH_TXQ_SETUP(sc, i))
2289                                 continue;
2290
2291                         npend = ath9k_has_pending_frames(sc, &sc->tx.txq[i]);
2292
2293                         if (npend)
2294                                 break;
2295                 }
2296
2297                 if (!npend)
2298                     break;
2299         }
2300
2301         if (drop) {
2302                 ath9k_ps_wakeup(sc);
2303                 spin_lock_bh(&sc->sc_pcu_lock);
2304                 drain_txq = ath_drain_all_txq(sc, false);
2305                 spin_unlock_bh(&sc->sc_pcu_lock);
2306
2307                 if (!drain_txq)
2308                         ath_reset(sc, false);
2309
2310                 ath9k_ps_restore(sc);
2311                 ieee80211_wake_queues(hw);
2312         }
2313
2314         ieee80211_queue_delayed_work(hw, &sc->tx_complete_work, 0);
2315         mutex_unlock(&sc->mutex);
2316 }
2317
2318 static bool ath9k_tx_frames_pending(struct ieee80211_hw *hw)
2319 {
2320         struct ath_softc *sc = hw->priv;
2321         int i;
2322
2323         for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
2324                 if (!ATH_TXQ_SETUP(sc, i))
2325                         continue;
2326
2327                 if (ath9k_has_pending_frames(sc, &sc->tx.txq[i]))
2328                         return true;
2329         }
2330         return false;
2331 }
2332
2333 static int ath9k_tx_last_beacon(struct ieee80211_hw *hw)
2334 {
2335         struct ath_softc *sc = hw->priv;
2336         struct ath_hw *ah = sc->sc_ah;
2337         struct ieee80211_vif *vif;
2338         struct ath_vif *avp;
2339         struct ath_buf *bf;
2340         struct ath_tx_status ts;
2341         int status;
2342
2343         vif = sc->beacon.bslot[0];
2344         if (!vif)
2345                 return 0;
2346
2347         avp = (void *)vif->drv_priv;
2348         if (!avp->is_bslot_active)
2349                 return 0;
2350
2351         if (!sc->beacon.tx_processed) {
2352                 tasklet_disable(&sc->bcon_tasklet);
2353
2354                 bf = avp->av_bcbuf;
2355                 if (!bf || !bf->bf_mpdu)
2356                         goto skip;
2357
2358                 status = ath9k_hw_txprocdesc(ah, bf->bf_desc, &ts);
2359                 if (status == -EINPROGRESS)
2360                         goto skip;
2361
2362                 sc->beacon.tx_processed = true;
2363                 sc->beacon.tx_last = !(ts.ts_status & ATH9K_TXERR_MASK);
2364
2365 skip:
2366                 tasklet_enable(&sc->bcon_tasklet);
2367         }
2368
2369         return sc->beacon.tx_last;
2370 }
2371
2372 static int ath9k_get_stats(struct ieee80211_hw *hw,
2373                            struct ieee80211_low_level_stats *stats)
2374 {
2375         struct ath_softc *sc = hw->priv;
2376         struct ath_hw *ah = sc->sc_ah;
2377         struct ath9k_mib_stats *mib_stats = &ah->ah_mibStats;
2378
2379         stats->dot11ACKFailureCount = mib_stats->ackrcv_bad;
2380         stats->dot11RTSFailureCount = mib_stats->rts_bad;
2381         stats->dot11FCSErrorCount = mib_stats->fcs_bad;
2382         stats->dot11RTSSuccessCount = mib_stats->rts_good;
2383         return 0;
2384 }
2385
2386 static u32 fill_chainmask(u32 cap, u32 new)
2387 {
2388         u32 filled = 0;
2389         int i;
2390
2391         for (i = 0; cap && new; i++, cap >>= 1) {
2392                 if (!(cap & BIT(0)))
2393                         continue;
2394
2395                 if (new & BIT(0))
2396                         filled |= BIT(i);
2397
2398                 new >>= 1;
2399         }
2400
2401         return filled;
2402 }
2403
2404 static int ath9k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
2405 {
2406         struct ath_softc *sc = hw->priv;
2407         struct ath_hw *ah = sc->sc_ah;
2408
2409         if (!rx_ant || !tx_ant)
2410                 return -EINVAL;
2411
2412         sc->ant_rx = rx_ant;
2413         sc->ant_tx = tx_ant;
2414
2415         if (ah->caps.rx_chainmask == 1)
2416                 return 0;
2417
2418         /* AR9100 runs into calibration issues if not all rx chains are enabled */
2419         if (AR_SREV_9100(ah))
2420                 ah->rxchainmask = 0x7;
2421         else
2422                 ah->rxchainmask = fill_chainmask(ah->caps.rx_chainmask, rx_ant);
2423
2424         ah->txchainmask = fill_chainmask(ah->caps.tx_chainmask, tx_ant);
2425         ath9k_reload_chainmask_settings(sc);
2426
2427         return 0;
2428 }
2429
2430 static int ath9k_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant)
2431 {
2432         struct ath_softc *sc = hw->priv;
2433
2434         *tx_ant = sc->ant_tx;
2435         *rx_ant = sc->ant_rx;
2436         return 0;
2437 }
2438
2439 struct ieee80211_ops ath9k_ops = {
2440         .tx                 = ath9k_tx,
2441         .start              = ath9k_start,
2442         .stop               = ath9k_stop,
2443         .add_interface      = ath9k_add_interface,
2444         .change_interface   = ath9k_change_interface,
2445         .remove_interface   = ath9k_remove_interface,
2446         .config             = ath9k_config,
2447         .configure_filter   = ath9k_configure_filter,
2448         .sta_add            = ath9k_sta_add,
2449         .sta_remove         = ath9k_sta_remove,
2450         .sta_notify         = ath9k_sta_notify,
2451         .conf_tx            = ath9k_conf_tx,
2452         .bss_info_changed   = ath9k_bss_info_changed,
2453         .set_key            = ath9k_set_key,
2454         .get_tsf            = ath9k_get_tsf,
2455         .set_tsf            = ath9k_set_tsf,
2456         .reset_tsf          = ath9k_reset_tsf,
2457         .ampdu_action       = ath9k_ampdu_action,
2458         .get_survey         = ath9k_get_survey,
2459         .rfkill_poll        = ath9k_rfkill_poll_state,
2460         .set_coverage_class = ath9k_set_coverage_class,
2461         .flush              = ath9k_flush,
2462         .tx_frames_pending  = ath9k_tx_frames_pending,
2463         .tx_last_beacon     = ath9k_tx_last_beacon,
2464         .get_stats          = ath9k_get_stats,
2465         .set_antenna        = ath9k_set_antenna,
2466         .get_antenna        = ath9k_get_antenna,
2467 };