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         unsigned long flags;
 115
 116         spin_lock_irqsave(&sc->sc_pm_lock, flags);
 117         if (--sc->ps_usecount != 0)
 118                 goto unlock;
 119
 120         spin_lock(&common->cc_lock);
 121         ath_hw_cycle_counters_update(common);
 122         spin_unlock(&common->cc_lock);
 123
 124         if (sc->ps_idle)
 125                 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_FULL_SLEEP);
 126         else if (sc->ps_enabled &&
 127                  !(sc->ps_flags & (PS_WAIT_FOR_BEACON |
 128                               PS_WAIT_FOR_CAB |
 129                               PS_WAIT_FOR_PSPOLL_DATA |
 130                               PS_WAIT_FOR_TX_ACK)))
 131                 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_NETWORK_SLEEP);
 132
 133  unlock:
 134         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 135 }
 136
 137 void ath_start_ani(struct ath_common *common)
 138 {
 139         struct ath_hw *ah = common->ah;
 140         unsigned long timestamp = jiffies_to_msecs(jiffies);
 141         struct ath_softc *sc = (struct ath_softc *) common->priv;
 142
 143         if (!(sc->sc_flags & SC_OP_ANI_RUN))
 144                 return;
 145
 146         if (sc->sc_flags & SC_OP_OFFCHANNEL)
 147                 return;
 148
 149         common->ani.longcal_timer = timestamp;
 150         common->ani.shortcal_timer = timestamp;
 151         common->ani.checkani_timer = timestamp;
 152
 153         mod_timer(&common->ani.timer,
 154                   jiffies +
 155                         msecs_to_jiffies((u32)ah->config.ani_poll_interval));
 156 }
 157
 158 static void ath_update_survey_nf(struct ath_softc *sc, int channel)
 159 {
 160         struct ath_hw *ah = sc->sc_ah;
 161         struct ath9k_channel *chan = &ah->channels[channel];
 162         struct survey_info *survey = &sc->survey[channel];
 163
 164         if (chan->noisefloor) {
 165                 survey->filled |= SURVEY_INFO_NOISE_DBM;
 166                 survey->noise = ath9k_hw_getchan_noise(ah, chan);
 167         }
 168 }
 169
 170 /*
 171  * Updates the survey statistics and returns the busy time since last
 172  * update in %, if the measurement duration was long enough for the
 173  * result to be useful, -1 otherwise.
 174  */
 175 static int ath_update_survey_stats(struct ath_softc *sc)
 176 {
 177         struct ath_hw *ah = sc->sc_ah;
 178         struct ath_common *common = ath9k_hw_common(ah);
 179         int pos = ah->curchan - &ah->channels[0];
 180         struct survey_info *survey = &sc->survey[pos];
 181         struct ath_cycle_counters *cc = &common->cc_survey;
 182         unsigned int div = common->clockrate * 1000;
 183         int ret = 0;
 184
 185         if (!ah->curchan)
 186                 return -1;
 187
 188         if (ah->power_mode == ATH9K_PM_AWAKE)
 189                 ath_hw_cycle_counters_update(common);
 190
 191         if (cc->cycles > 0) {
 192                 survey->filled |= SURVEY_INFO_CHANNEL_TIME |
 193                         SURVEY_INFO_CHANNEL_TIME_BUSY |
 194                         SURVEY_INFO_CHANNEL_TIME_RX |
 195                         SURVEY_INFO_CHANNEL_TIME_TX;
 196                 survey->channel_time += cc->cycles / div;
 197                 survey->channel_time_busy += cc->rx_busy / div;
 198                 survey->channel_time_rx += cc->rx_frame / div;
 199                 survey->channel_time_tx += cc->tx_frame / div;
 200         }
 201
 202         if (cc->cycles < div)
 203                 return -1;
 204
 205         if (cc->cycles > 0)
 206                 ret = cc->rx_busy * 100 / cc->cycles;
 207
 208         memset(cc, 0, sizeof(*cc));
 209
 210         ath_update_survey_nf(sc, pos);
 211
 212         return ret;
 213 }
 214
 215 /*
 216  * Set/change channels.  If the channel is really being changed, it's done
 217  * by reseting the chip.  To accomplish this we must first cleanup any pending
 218  * DMA, then restart stuff.
 219 */
 220 static int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
 221                     struct ath9k_channel *hchan)
 222 {
 223         struct ath_hw *ah = sc->sc_ah;
 224         struct ath_common *common = ath9k_hw_common(ah);
 225         struct ieee80211_conf *conf = &common->hw->conf;
 226         bool fastcc = true, stopped;
 227         struct ieee80211_channel *channel = hw->conf.channel;
 228         struct ath9k_hw_cal_data *caldata = NULL;
 229         int r;
 230
 231         if (sc->sc_flags & SC_OP_INVALID)
 232                 return -EIO;
 233
 234         sc->hw_busy_count = 0;
 235
 236         del_timer_sync(&common->ani.timer);
 237         cancel_work_sync(&sc->paprd_work);
 238         cancel_work_sync(&sc->hw_check_work);
 239         cancel_delayed_work_sync(&sc->tx_complete_work);
 240         cancel_delayed_work_sync(&sc->hw_pll_work);
 241
 242         ath9k_ps_wakeup(sc);
 243
 244         spin_lock_bh(&sc->sc_pcu_lock);
 245
 246         /*
 247          * This is only performed if the channel settings have
 248          * actually changed.
 249          *
 250          * To switch channels clear any pending DMA operations;
 251          * wait long enough for the RX fifo to drain, reset the
 252          * hardware at the new frequency, and then re-enable
 253          * the relevant bits of the h/w.
 254          */
 255         ath9k_hw_disable_interrupts(ah);
 256         stopped = ath_drain_all_txq(sc, false);
 257
 258         if (!ath_stoprecv(sc))
 259                 stopped = false;
 260
 261         if (!ath9k_hw_check_alive(ah))
 262                 stopped = false;
 263
 264         /* XXX: do not flush receive queue here. We don't want
 265          * to flush data frames already in queue because of
 266          * changing channel. */
 267
 268         if (!stopped || !(sc->sc_flags & SC_OP_OFFCHANNEL))
 269                 fastcc = false;
 270
 271         if (!(sc->sc_flags & SC_OP_OFFCHANNEL))
 272                 caldata = &sc->caldata;
 273
 274         ath_dbg(common, ATH_DBG_CONFIG,
 275                 "(%u MHz) -> (%u MHz), conf_is_ht40: %d fastcc: %d\n",
 276                 sc->sc_ah->curchan->channel,
 277                 channel->center_freq, conf_is_ht40(conf),
 278                 fastcc);
 279
 280         r = ath9k_hw_reset(ah, hchan, caldata, fastcc);
 281         if (r) {
 282                 ath_err(common,
 283                         "Unable to reset channel (%u MHz), reset status %d\n",
 284                         channel->center_freq, r);
 285                 goto ps_restore;
 286         }
 287
 288         if (ath_startrecv(sc) != 0) {
 289                 ath_err(common, "Unable to restart recv logic\n");
 290                 r = -EIO;
 291                 goto ps_restore;
 292         }
 293
 294         ath9k_cmn_update_txpow(ah, sc->curtxpow,
 295                                sc->config.txpowlimit, &sc->curtxpow);
 296         ath9k_hw_set_interrupts(ah, ah->imask);
 297         ath9k_hw_enable_interrupts(ah);
 298
 299         if (!(sc->sc_flags & (SC_OP_OFFCHANNEL))) {
 300                 if (sc->sc_flags & SC_OP_BEACONS)
 301                         ath_set_beacon(sc);
 302                 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
 303                 ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/2);
 304                 if (!common->disable_ani)
 305                         ath_start_ani(common);
 306         }
 307
 308  ps_restore:
 309         ieee80211_wake_queues(hw);
 310
 311         spin_unlock_bh(&sc->sc_pcu_lock);
 312
 313         ath9k_ps_restore(sc);
 314         return r;
 315 }
 316
 317 static void ath_paprd_activate(struct ath_softc *sc)
 318 {
 319         struct ath_hw *ah = sc->sc_ah;
 320         struct ath9k_hw_cal_data *caldata = ah->caldata;
 321         int chain;
 322
 323         if (!caldata || !caldata->paprd_done)
 324                 return;
 325
 326         ath9k_ps_wakeup(sc);
 327         ar9003_paprd_enable(ah, false);
 328         for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
 329                 if (!(ah->txchainmask & BIT(chain)))
 330                         continue;
 331
 332                 ar9003_paprd_populate_single_table(ah, caldata, chain);
 333         }
 334
 335         ar9003_paprd_enable(ah, true);
 336         ath9k_ps_restore(sc);
 337 }
 338
 339 static bool ath_paprd_send_frame(struct ath_softc *sc, struct sk_buff *skb, int chain)
 340 {
 341         struct ieee80211_hw *hw = sc->hw;
 342         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
 343         struct ath_hw *ah = sc->sc_ah;
 344         struct ath_common *common = ath9k_hw_common(ah);
 345         struct ath_tx_control txctl;
 346         int time_left;
 347
 348         memset(&txctl, 0, sizeof(txctl));
 349         txctl.txq = sc->tx.txq_map[WME_AC_BE];
 350
 351         memset(tx_info, 0, sizeof(*tx_info));
 352         tx_info->band = hw->conf.channel->band;
 353         tx_info->flags |= IEEE80211_TX_CTL_NO_ACK;
 354         tx_info->control.rates[0].idx = 0;
 355         tx_info->control.rates[0].count = 1;
 356         tx_info->control.rates[0].flags = IEEE80211_TX_RC_MCS;
 357         tx_info->control.rates[1].idx = -1;
 358
 359         init_completion(&sc->paprd_complete);
 360         txctl.paprd = BIT(chain);
 361
 362         if (ath_tx_start(hw, skb, &txctl) != 0) {
 363                 ath_dbg(common, ATH_DBG_CALIBRATE, "PAPRD TX failed\n");
 364                 dev_kfree_skb_any(skb);
 365                 return false;
 366         }
 367
 368         time_left = wait_for_completion_timeout(&sc->paprd_complete,
 369                         msecs_to_jiffies(ATH_PAPRD_TIMEOUT));
 370
 371         if (!time_left)
 372                 ath_dbg(common, ATH_DBG_CALIBRATE,
 373                         "Timeout waiting for paprd training on TX chain %d\n",
 374                         chain);
 375
 376         return !!time_left;
 377 }
 378
 379 void ath_paprd_calibrate(struct work_struct *work)
 380 {
 381         struct ath_softc *sc = container_of(work, struct ath_softc, paprd_work);
 382         struct ieee80211_hw *hw = sc->hw;
 383         struct ath_hw *ah = sc->sc_ah;
 384         struct ieee80211_hdr *hdr;
 385         struct sk_buff *skb = NULL;
 386         struct ath9k_hw_cal_data *caldata = ah->caldata;
 387         struct ath_common *common = ath9k_hw_common(ah);
 388         int ftype;
 389         int chain_ok = 0;
 390         int chain;
 391         int len = 1800;
 392
 393         if (!caldata)
 394                 return;
 395
 396         ath9k_ps_wakeup(sc);
 397
 398         if (ar9003_paprd_init_table(ah) < 0)
 399                 goto fail_paprd;
 400
 401         skb = alloc_skb(len, GFP_KERNEL);
 402         if (!skb)
 403                 goto fail_paprd;
 404
 405         skb_put(skb, len);
 406         memset(skb->data, 0, len);
 407         hdr = (struct ieee80211_hdr *)skb->data;
 408         ftype = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC;
 409         hdr->frame_control = cpu_to_le16(ftype);
 410         hdr->duration_id = cpu_to_le16(10);
 411         memcpy(hdr->addr1, hw->wiphy->perm_addr, ETH_ALEN);
 412         memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN);
 413         memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN);
 414
 415         for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
 416                 if (!(ah->txchainmask & BIT(chain)))
 417                         continue;
 418
 419                 chain_ok = 0;
 420
 421                 ath_dbg(common, ATH_DBG_CALIBRATE,
 422                         "Sending PAPRD frame for thermal measurement "
 423                         "on chain %d\n", chain);
 424                 if (!ath_paprd_send_frame(sc, skb, chain))
 425                         goto fail_paprd;
 426
 427                 ar9003_paprd_setup_gain_table(ah, chain);
 428
 429                 ath_dbg(common, ATH_DBG_CALIBRATE,
 430                         "Sending PAPRD training frame on chain %d\n", chain);
 431                 if (!ath_paprd_send_frame(sc, skb, chain))
 432                         goto fail_paprd;
 433
 434                 if (!ar9003_paprd_is_done(ah)) {
 435                         ath_dbg(common, ATH_DBG_CALIBRATE,
 436                                 "PAPRD not yet done on chain %d\n", chain);
 437                         break;
 438                 }
 439
 440                 if (ar9003_paprd_create_curve(ah, caldata, chain)) {
 441                         ath_dbg(common, ATH_DBG_CALIBRATE,
 442                                 "PAPRD create curve failed on chain %d\n",
 443                                                                    chain);
 444                         break;
 445                 }
 446
 447                 chain_ok = 1;
 448         }
 449         kfree_skb(skb);
 450
 451         if (chain_ok) {
 452                 caldata->paprd_done = true;
 453                 ath_paprd_activate(sc);
 454         }
 455
 456 fail_paprd:
 457         ath9k_ps_restore(sc);
 458 }
 459
 460 /*
 461  *  This routine performs the periodic noise floor calibration function
 462  *  that is used to adjust and optimize the chip performance.  This
 463  *  takes environmental changes (location, temperature) into account.
 464  *  When the task is complete, it reschedules itself depending on the
 465  *  appropriate interval that was calculated.
 466  */
 467 void ath_ani_calibrate(unsigned long data)
 468 {
 469         struct ath_softc *sc = (struct ath_softc *)data;
 470         struct ath_hw *ah = sc->sc_ah;
 471         struct ath_common *common = ath9k_hw_common(ah);
 472         bool longcal = false;
 473         bool shortcal = false;
 474         bool aniflag = false;
 475         unsigned int timestamp = jiffies_to_msecs(jiffies);
 476         u32 cal_interval, short_cal_interval, long_cal_interval;
 477         unsigned long flags;
 478
 479         if (ah->caldata && ah->caldata->nfcal_interference)
 480                 long_cal_interval = ATH_LONG_CALINTERVAL_INT;
 481         else
 482                 long_cal_interval = ATH_LONG_CALINTERVAL;
 483
 484         short_cal_interval = (ah->opmode == NL80211_IFTYPE_AP) ?
 485                 ATH_AP_SHORT_CALINTERVAL : ATH_STA_SHORT_CALINTERVAL;
 486
 487         /* Only calibrate if awake */
 488         if (sc->sc_ah->power_mode != ATH9K_PM_AWAKE)
 489                 goto set_timer;
 490
 491         ath9k_ps_wakeup(sc);
 492
 493         /* Long calibration runs independently of short calibration. */
 494         if ((timestamp - common->ani.longcal_timer) >= long_cal_interval) {
 495                 longcal = true;
 496                 ath_dbg(common, ATH_DBG_ANI, "longcal @%lu\n", jiffies);
 497                 common->ani.longcal_timer = timestamp;
 498         }
 499
 500         /* Short calibration applies only while caldone is false */
 501         if (!common->ani.caldone) {
 502                 if ((timestamp - common->ani.shortcal_timer) >= short_cal_interval) {
 503                         shortcal = true;
 504                         ath_dbg(common, ATH_DBG_ANI,
 505                                 "shortcal @%lu\n", jiffies);
 506                         common->ani.shortcal_timer = timestamp;
 507                         common->ani.resetcal_timer = timestamp;
 508                 }
 509         } else {
 510                 if ((timestamp - common->ani.resetcal_timer) >=
 511                     ATH_RESTART_CALINTERVAL) {
 512                         common->ani.caldone = ath9k_hw_reset_calvalid(ah);
 513                         if (common->ani.caldone)
 514                                 common->ani.resetcal_timer = timestamp;
 515                 }
 516         }
 517
 518         /* Verify whether we must check ANI */
 519         if ((timestamp - common->ani.checkani_timer) >=
 520              ah->config.ani_poll_interval) {
 521                 aniflag = true;
 522                 common->ani.checkani_timer = timestamp;
 523         }
 524
 525         /* Call ANI routine if necessary */
 526         if (aniflag) {
 527                 spin_lock_irqsave(&common->cc_lock, flags);
 528                 ath9k_hw_ani_monitor(ah, ah->curchan);
 529                 ath_update_survey_stats(sc);
 530                 spin_unlock_irqrestore(&common->cc_lock, flags);
 531         }
 532
 533         /* Perform calibration if necessary */
 534         if (longcal || shortcal) {
 535                 common->ani.caldone =
 536                         ath9k_hw_calibrate(ah, ah->curchan,
 537                                                 ah->rxchainmask, longcal);
 538         }
 539
 540         ath9k_ps_restore(sc);
 541
 542 set_timer:
 543         /*
 544         * Set timer interval based on previous results.
 545         * The interval must be the shortest necessary to satisfy ANI,
 546         * short calibration and long calibration.
 547         */
 548         ath9k_debug_samp_bb_mac(sc);
 549         cal_interval = ATH_LONG_CALINTERVAL;
 550         if (sc->sc_ah->config.enable_ani)
 551                 cal_interval = min(cal_interval,
 552                                    (u32)ah->config.ani_poll_interval);
 553         if (!common->ani.caldone)
 554                 cal_interval = min(cal_interval, (u32)short_cal_interval);
 555
 556         mod_timer(&common->ani.timer, jiffies + msecs_to_jiffies(cal_interval));
 557         if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_PAPRD) && ah->caldata) {
 558                 if (!ah->caldata->paprd_done)
 559                         ieee80211_queue_work(sc->hw, &sc->paprd_work);
 560                 else if (!ah->paprd_table_write_done)
 561                         ath_paprd_activate(sc);
 562         }
 563 }
 564
 565 static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta)
 566 {
 567         struct ath_node *an;
 568         an = (struct ath_node *)sta->drv_priv;
 569
 570 #ifdef CONFIG_ATH9K_DEBUGFS
 571         spin_lock(&sc->nodes_lock);
 572         list_add(&an->list, &sc->nodes);
 573         spin_unlock(&sc->nodes_lock);
 574         an->sta = sta;
 575 #endif
 576         if (sc->sc_flags & SC_OP_TXAGGR) {
 577                 ath_tx_node_init(sc, an);
 578                 an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR +
 579                                      sta->ht_cap.ampdu_factor);
 580                 an->mpdudensity = parse_mpdudensity(sta->ht_cap.ampdu_density);
 581         }
 582 }
 583
 584 static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
 585 {
 586         struct ath_node *an = (struct ath_node *)sta->drv_priv;
 587
 588 #ifdef CONFIG_ATH9K_DEBUGFS
 589         spin_lock(&sc->nodes_lock);
 590         list_del(&an->list);
 591         spin_unlock(&sc->nodes_lock);
 592         an->sta = NULL;
 593 #endif
 594
 595         if (sc->sc_flags & SC_OP_TXAGGR)
 596                 ath_tx_node_cleanup(sc, an);
 597 }
 598
 599
 600 void ath9k_tasklet(unsigned long data)
 601 {
 602         struct ath_softc *sc = (struct ath_softc *)data;
 603         struct ath_hw *ah = sc->sc_ah;
 604         struct ath_common *common = ath9k_hw_common(ah);
 605
 606         u32 status = sc->intrstatus;
 607         u32 rxmask;
 608
 609         if ((status & ATH9K_INT_FATAL) ||
 610             (status & ATH9K_INT_BB_WATCHDOG)) {
 611                 spin_lock(&sc->sc_pcu_lock);
 612                 ath_reset(sc, true);
 613                 spin_unlock(&sc->sc_pcu_lock);
 614                 return;
 615         }
 616
 617         ath9k_ps_wakeup(sc);
 618         spin_lock(&sc->sc_pcu_lock);
 619
 620         /*
 621          * Only run the baseband hang check if beacons stop working in AP or
 622          * IBSS mode, because it has a high false positive rate. For station
 623          * mode it should not be necessary, since the upper layers will detect
 624          * this through a beacon miss automatically and the following channel
 625          * change will trigger a hardware reset anyway
 626          */
 627         if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0 &&
 628             !ath9k_hw_check_alive(ah))
 629                 ieee80211_queue_work(sc->hw, &sc->hw_check_work);
 630
 631         if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) {
 632                 /*
 633                  * TSF sync does not look correct; remain awake to sync with
 634                  * the next Beacon.
 635                  */
 636                 ath_dbg(common, ATH_DBG_PS,
 637                         "TSFOOR - Sync with next Beacon\n");
 638                 sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC;
 639         }
 640
 641         if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
 642                 rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL |
 643                           ATH9K_INT_RXORN);
 644         else
 645                 rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
 646
 647         if (status & rxmask) {
 648                 /* Check for high priority Rx first */
 649                 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
 650                     (status & ATH9K_INT_RXHP))
 651                         ath_rx_tasklet(sc, 0, true);
 652
 653                 ath_rx_tasklet(sc, 0, false);
 654         }
 655
 656         if (status & ATH9K_INT_TX) {
 657                 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
 658                         ath_tx_edma_tasklet(sc);
 659                 else
 660                         ath_tx_tasklet(sc);
 661         }
 662
 663         if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
 664                 if (status & ATH9K_INT_GENTIMER)
 665                         ath_gen_timer_isr(sc->sc_ah);
 666
 667         /* re-enable hardware interrupt */
 668         ath9k_hw_enable_interrupts(ah);
 669
 670         spin_unlock(&sc->sc_pcu_lock);
 671         ath9k_ps_restore(sc);
 672 }
 673
 674 irqreturn_t ath_isr(int irq, void *dev)
 675 {
 676 #define SCHED_INTR (                            \
 677                 ATH9K_INT_FATAL |               \
 678                 ATH9K_INT_BB_WATCHDOG |         \
 679                 ATH9K_INT_RXORN |               \
 680                 ATH9K_INT_RXEOL |               \
 681                 ATH9K_INT_RX |                  \
 682                 ATH9K_INT_RXLP |                \
 683                 ATH9K_INT_RXHP |                \
 684                 ATH9K_INT_TX |                  \
 685                 ATH9K_INT_BMISS |               \
 686                 ATH9K_INT_CST |                 \
 687                 ATH9K_INT_TSFOOR |              \
 688                 ATH9K_INT_GENTIMER)
 689
 690         struct ath_softc *sc = dev;
 691         struct ath_hw *ah = sc->sc_ah;
 692         struct ath_common *common = ath9k_hw_common(ah);
 693         enum ath9k_int status;
 694         bool sched = false;
 695
 696         /*
 697          * The hardware is not ready/present, don't
 698          * touch anything. Note this can happen early
 699          * on if the IRQ is shared.
 700          */
 701         if (sc->sc_flags & SC_OP_INVALID)
 702                 return IRQ_NONE;
 703
 704
 705         /* shared irq, not for us */
 706
 707         if (!ath9k_hw_intrpend(ah))
 708                 return IRQ_NONE;
 709
 710         /*
 711          * Figure out the reason(s) for the interrupt.  Note
 712          * that the hal returns a pseudo-ISR that may include
 713          * bits we haven't explicitly enabled so we mask the
 714          * value to insure we only process bits we requested.
 715          */
 716         ath9k_hw_getisr(ah, &status);   /* NB: clears ISR too */
 717         status &= ah->imask;    /* discard unasked-for bits */
 718
 719         /*
 720          * If there are no status bits set, then this interrupt was not
 721          * for me (should have been caught above).
 722          */
 723         if (!status)
 724                 return IRQ_NONE;
 725
 726         /* Cache the status */
 727         sc->intrstatus = status;
 728
 729         if (status & SCHED_INTR)
 730                 sched = true;
 731
 732         /*
 733          * If a FATAL or RXORN interrupt is received, we have to reset the
 734          * chip immediately.
 735          */
 736         if ((status & ATH9K_INT_FATAL) || ((status & ATH9K_INT_RXORN) &&
 737             !(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)))
 738                 goto chip_reset;
 739
 740         if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
 741             (status & ATH9K_INT_BB_WATCHDOG)) {
 742
 743                 spin_lock(&common->cc_lock);
 744                 ath_hw_cycle_counters_update(common);
 745                 ar9003_hw_bb_watchdog_dbg_info(ah);
 746                 spin_unlock(&common->cc_lock);
 747
 748                 goto chip_reset;
 749         }
 750
 751         if (status & ATH9K_INT_SWBA)
 752                 tasklet_schedule(&sc->bcon_tasklet);
 753
 754         if (status & ATH9K_INT_TXURN)
 755                 ath9k_hw_updatetxtriglevel(ah, true);
 756
 757         if (status & ATH9K_INT_RXEOL) {
 758                 ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
 759                 ath9k_hw_set_interrupts(ah, ah->imask);
 760         }
 761
 762         if (status & ATH9K_INT_MIB) {
 763                 /*
 764                  * Disable interrupts until we service the MIB
 765                  * interrupt; otherwise it will continue to
 766                  * fire.
 767                  */
 768                 ath9k_hw_disable_interrupts(ah);
 769                 /*
 770                  * Let the hal handle the event. We assume
 771                  * it will clear whatever condition caused
 772                  * the interrupt.
 773                  */
 774                 spin_lock(&common->cc_lock);
 775                 ath9k_hw_proc_mib_event(ah);
 776                 spin_unlock(&common->cc_lock);
 777                 ath9k_hw_enable_interrupts(ah);
 778         }
 779
 780         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
 781                 if (status & ATH9K_INT_TIM_TIMER) {
 782                         if (ATH_DBG_WARN_ON_ONCE(sc->ps_idle))
 783                                 goto chip_reset;
 784                         /* Clear RxAbort bit so that we can
 785                          * receive frames */
 786                         ath9k_setpower(sc, ATH9K_PM_AWAKE);
 787                         ath9k_hw_setrxabort(sc->sc_ah, 0);
 788                         sc->ps_flags |= PS_WAIT_FOR_BEACON;
 789                 }
 790
 791 chip_reset:
 792
 793         ath_debug_stat_interrupt(sc, status);
 794
 795         if (sched) {
 796                 /* turn off every interrupt */
 797                 ath9k_hw_disable_interrupts(ah);
 798                 tasklet_schedule(&sc->intr_tq);
 799         }
 800
 801         return IRQ_HANDLED;
 802
 803 #undef SCHED_INTR
 804 }
 805
 806 static void ath_radio_enable(struct ath_softc *sc, struct ieee80211_hw *hw)
 807 {
 808         struct ath_hw *ah = sc->sc_ah;
 809         struct ath_common *common = ath9k_hw_common(ah);
 810         struct ieee80211_channel *channel = hw->conf.channel;
 811         int r;
 812
 813         ath9k_ps_wakeup(sc);
 814         spin_lock_bh(&sc->sc_pcu_lock);
 815         atomic_set(&ah->intr_ref_cnt, -1);
 816
 817         ath9k_hw_configpcipowersave(ah, false);
 818
 819         if (!ah->curchan)
 820                 ah->curchan = ath9k_cmn_get_curchannel(sc->hw, ah);
 821
 822         r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
 823         if (r) {
 824                 ath_err(common,
 825                         "Unable to reset channel (%u MHz), reset status %d\n",
 826                         channel->center_freq, r);
 827         }
 828
 829         ath9k_cmn_update_txpow(ah, sc->curtxpow,
 830                                sc->config.txpowlimit, &sc->curtxpow);
 831         if (ath_startrecv(sc) != 0) {
 832                 ath_err(common, "Unable to restart recv logic\n");
 833                 goto out;
 834         }
 835         if (sc->sc_flags & SC_OP_BEACONS)
 836                 ath_set_beacon(sc);     /* restart beacons */
 837
 838         /* Re-Enable  interrupts */
 839         ath9k_hw_set_interrupts(ah, ah->imask);
 840         ath9k_hw_enable_interrupts(ah);
 841
 842         /* Enable LED */
 843         ath9k_hw_cfg_output(ah, ah->led_pin,
 844                             AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
 845         ath9k_hw_set_gpio(ah, ah->led_pin, 0);
 846
 847         ieee80211_wake_queues(hw);
 848         ieee80211_queue_delayed_work(hw, &sc->hw_pll_work, HZ/2);
 849
 850 out:
 851         spin_unlock_bh(&sc->sc_pcu_lock);
 852
 853         ath9k_ps_restore(sc);
 854 }
 855
 856 void ath_radio_disable(struct ath_softc *sc, struct ieee80211_hw *hw)
 857 {
 858         struct ath_hw *ah = sc->sc_ah;
 859         struct ieee80211_channel *channel = hw->conf.channel;
 860         int r;
 861
 862         ath9k_ps_wakeup(sc);
 863         cancel_delayed_work_sync(&sc->hw_pll_work);
 864
 865         spin_lock_bh(&sc->sc_pcu_lock);
 866
 867         ieee80211_stop_queues(hw);
 868
 869         /*
 870          * Keep the LED on when the radio is disabled
 871          * during idle unassociated state.
 872          */
 873         if (!sc->ps_idle) {
 874                 ath9k_hw_set_gpio(ah, ah->led_pin, 1);
 875                 ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
 876         }
 877
 878         /* Disable interrupts */
 879         ath9k_hw_disable_interrupts(ah);
 880
 881         ath_drain_all_txq(sc, false);   /* clear pending tx frames */
 882
 883         ath_stoprecv(sc);               /* turn off frame recv */
 884         ath_flushrecv(sc);              /* flush recv queue */
 885
 886         if (!ah->curchan)
 887                 ah->curchan = ath9k_cmn_get_curchannel(hw, ah);
 888
 889         r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
 890         if (r) {
 891                 ath_err(ath9k_hw_common(sc->sc_ah),
 892                         "Unable to reset channel (%u MHz), reset status %d\n",
 893                         channel->center_freq, r);
 894         }
 895
 896         ath9k_hw_phy_disable(ah);
 897
 898         ath9k_hw_configpcipowersave(ah, true);
 899
 900         spin_unlock_bh(&sc->sc_pcu_lock);
 901         ath9k_ps_restore(sc);
 902 }
 903
 904 int ath_reset(struct ath_softc *sc, bool retry_tx)
 905 {
 906         struct ath_hw *ah = sc->sc_ah;
 907         struct ath_common *common = ath9k_hw_common(ah);
 908         struct ieee80211_hw *hw = sc->hw;
 909         int r;
 910
 911         sc->hw_busy_count = 0;
 912
 913         ath9k_debug_samp_bb_mac(sc);
 914         /* Stop ANI */
 915
 916         del_timer_sync(&common->ani.timer);
 917
 918         ath9k_ps_wakeup(sc);
 919
 920         ieee80211_stop_queues(hw);
 921
 922         ath9k_hw_disable_interrupts(ah);
 923         ath_drain_all_txq(sc, retry_tx);
 924
 925         ath_stoprecv(sc);
 926         ath_flushrecv(sc);
 927
 928         r = ath9k_hw_reset(ah, sc->sc_ah->curchan, ah->caldata, false);
 929         if (r)
 930                 ath_err(common,
 931                         "Unable to reset hardware; reset status %d\n", r);
 932
 933         if (ath_startrecv(sc) != 0)
 934                 ath_err(common, "Unable to start recv logic\n");
 935
 936         /*
 937          * We may be doing a reset in response to a request
 938          * that changes the channel so update any state that
 939          * might change as a result.
 940          */
 941         ath9k_cmn_update_txpow(ah, sc->curtxpow,
 942                                sc->config.txpowlimit, &sc->curtxpow);
 943
 944         if ((sc->sc_flags & SC_OP_BEACONS) || !(sc->sc_flags & (SC_OP_OFFCHANNEL)))
 945                 ath_set_beacon(sc);     /* restart beacons */
 946
 947         ath9k_hw_set_interrupts(ah, ah->imask);
 948         ath9k_hw_enable_interrupts(ah);
 949
 950         if (retry_tx) {
 951                 int i;
 952                 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
 953                         if (ATH_TXQ_SETUP(sc, i)) {
 954                                 spin_lock_bh(&sc->tx.txq[i].axq_lock);
 955                                 ath_txq_schedule(sc, &sc->tx.txq[i]);
 956                                 spin_unlock_bh(&sc->tx.txq[i].axq_lock);
 957                         }
 958                 }
 959         }
 960
 961         ieee80211_wake_queues(hw);
 962
 963         /* Start ANI */
 964         if (!common->disable_ani)
 965                 ath_start_ani(common);
 966
 967         ath9k_ps_restore(sc);
 968
 969         return r;
 970 }
 971
 972 void ath_hw_check(struct work_struct *work)
 973 {
 974         struct ath_softc *sc = container_of(work, struct ath_softc, hw_check_work);
 975         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 976         unsigned long flags;
 977         int busy;
 978
 979         ath9k_ps_wakeup(sc);
 980         if (ath9k_hw_check_alive(sc->sc_ah))
 981                 goto out;
 982
 983         spin_lock_irqsave(&common->cc_lock, flags);
 984         busy = ath_update_survey_stats(sc);
 985         spin_unlock_irqrestore(&common->cc_lock, flags);
 986
 987         ath_dbg(common, ATH_DBG_RESET, "Possible baseband hang, "
 988                 "busy=%d (try %d)\n", busy, sc->hw_busy_count + 1);
 989         if (busy >= 99) {
 990                 if (++sc->hw_busy_count >= 3) {
 991                         spin_lock_bh(&sc->sc_pcu_lock);
 992                         ath_reset(sc, true);
 993                         spin_unlock_bh(&sc->sc_pcu_lock);
 994                 }
 995
 996         } else if (busy >= 0)
 997                 sc->hw_busy_count = 0;
 998
 999 out:
1000         ath9k_ps_restore(sc);
1001 }
1002
1003 static void ath_hw_pll_rx_hang_check(struct ath_softc *sc, u32 pll_sqsum)
1004 {
1005         static int count;
1006         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1007
1008         if (pll_sqsum >= 0x40000) {
1009                 count++;
1010                 if (count == 3) {
1011                         /* Rx is hung for more than 500ms. Reset it */
1012                         ath_dbg(common, ATH_DBG_RESET,
1013                                 "Possible RX hang, resetting");
1014                         spin_lock_bh(&sc->sc_pcu_lock);
1015                         ath_reset(sc, true);
1016                         spin_unlock_bh(&sc->sc_pcu_lock);
1017                         count = 0;
1018                 }
1019         } else
1020                 count = 0;
1021 }
1022
1023 void ath_hw_pll_work(struct work_struct *work)
1024 {
1025         struct ath_softc *sc = container_of(work, struct ath_softc,
1026                                             hw_pll_work.work);
1027         u32 pll_sqsum;
1028
1029         if (AR_SREV_9485(sc->sc_ah)) {
1030
1031                 ath9k_ps_wakeup(sc);
1032                 pll_sqsum = ar9003_get_pll_sqsum_dvc(sc->sc_ah);
1033                 ath9k_ps_restore(sc);
1034
1035                 ath_hw_pll_rx_hang_check(sc, pll_sqsum);
1036
1037                 ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/5);
1038         }
1039 }
1040
1041 /**********************/
1042 /* mac80211 callbacks */
1043 /**********************/
1044
1045 static int ath9k_start(struct ieee80211_hw *hw)
1046 {
1047         struct ath_softc *sc = hw->priv;
1048         struct ath_hw *ah = sc->sc_ah;
1049         struct ath_common *common = ath9k_hw_common(ah);
1050         struct ieee80211_channel *curchan = hw->conf.channel;
1051         struct ath9k_channel *init_channel;
1052         int r;
1053
1054         ath_dbg(common, ATH_DBG_CONFIG,
1055                 "Starting driver with initial channel: %d MHz\n",
1056                 curchan->center_freq);
1057
1058         ath9k_ps_wakeup(sc);
1059
1060         mutex_lock(&sc->mutex);
1061
1062         /* setup initial channel */
1063         sc->chan_idx = curchan->hw_value;
1064
1065         init_channel = ath9k_cmn_get_curchannel(hw, ah);
1066
1067         /* Reset SERDES registers */
1068         ath9k_hw_configpcipowersave(ah, false);
1069
1070         /*
1071          * The basic interface to setting the hardware in a good
1072          * state is ``reset''.  On return the hardware is known to
1073          * be powered up and with interrupts disabled.  This must
1074          * be followed by initialization of the appropriate bits
1075          * and then setup of the interrupt mask.
1076          */
1077         spin_lock_bh(&sc->sc_pcu_lock);
1078         r = ath9k_hw_reset(ah, init_channel, ah->caldata, false);
1079         if (r) {
1080                 ath_err(common,
1081                         "Unable to reset hardware; reset status %d (freq %u MHz)\n",
1082                         r, curchan->center_freq);
1083                 spin_unlock_bh(&sc->sc_pcu_lock);
1084                 goto mutex_unlock;
1085         }
1086
1087         /*
1088          * This is needed only to setup initial state
1089          * but it's best done after a reset.
1090          */
1091         ath9k_cmn_update_txpow(ah, sc->curtxpow,
1092                         sc->config.txpowlimit, &sc->curtxpow);
1093
1094         /*
1095          * Setup the hardware after reset:
1096          * The receive engine is set going.
1097          * Frame transmit is handled entirely
1098          * in the frame output path; there's nothing to do
1099          * here except setup the interrupt mask.
1100          */
1101         if (ath_startrecv(sc) != 0) {
1102                 ath_err(common, "Unable to start recv logic\n");
1103                 r = -EIO;
1104                 spin_unlock_bh(&sc->sc_pcu_lock);
1105                 goto mutex_unlock;
1106         }
1107         spin_unlock_bh(&sc->sc_pcu_lock);
1108
1109         /* Setup our intr mask. */
1110         ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL |
1111                     ATH9K_INT_RXORN | ATH9K_INT_FATAL |
1112                     ATH9K_INT_GLOBAL;
1113
1114         if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
1115                 ah->imask |= ATH9K_INT_RXHP |
1116                              ATH9K_INT_RXLP |
1117                              ATH9K_INT_BB_WATCHDOG;
1118         else
1119                 ah->imask |= ATH9K_INT_RX;
1120
1121         ah->imask |= ATH9K_INT_GTT;
1122
1123         if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
1124                 ah->imask |= ATH9K_INT_CST;
1125
1126         sc->sc_flags &= ~SC_OP_INVALID;
1127         sc->sc_ah->is_monitoring = false;
1128
1129         /* Disable BMISS interrupt when we're not associated */
1130         ah->imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
1131         ath9k_hw_set_interrupts(ah, ah->imask);
1132         ath9k_hw_enable_interrupts(ah);
1133
1134         ieee80211_wake_queues(hw);
1135
1136         ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
1137
1138         if ((ah->btcoex_hw.scheme != ATH_BTCOEX_CFG_NONE) &&
1139             !ah->btcoex_hw.enabled) {
1140                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
1141                                            AR_STOMP_LOW_WLAN_WGHT);
1142                 ath9k_hw_btcoex_enable(ah);
1143
1144                 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
1145                         ath9k_btcoex_timer_resume(sc);
1146         }
1147
1148         if (ah->caps.pcie_lcr_extsync_en && common->bus_ops->extn_synch_en)
1149                 common->bus_ops->extn_synch_en(common);
1150
1151 mutex_unlock:
1152         mutex_unlock(&sc->mutex);
1153
1154         ath9k_ps_restore(sc);
1155
1156         return r;
1157 }
1158
1159 static void ath9k_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
1160 {
1161         struct ath_softc *sc = hw->priv;
1162         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1163         struct ath_tx_control txctl;
1164         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1165
1166         if (sc->ps_enabled) {
1167                 /*
1168                  * mac80211 does not set PM field for normal data frames, so we
1169                  * need to update that based on the current PS mode.
1170                  */
1171                 if (ieee80211_is_data(hdr->frame_control) &&
1172                     !ieee80211_is_nullfunc(hdr->frame_control) &&
1173                     !ieee80211_has_pm(hdr->frame_control)) {
1174                         ath_dbg(common, ATH_DBG_PS,
1175                                 "Add PM=1 for a TX frame while in PS mode\n");
1176                         hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1177                 }
1178         }
1179
1180         if (unlikely(sc->sc_ah->power_mode != ATH9K_PM_AWAKE)) {
1181                 /*
1182                  * We are using PS-Poll and mac80211 can request TX while in
1183                  * power save mode. Need to wake up hardware for the TX to be
1184                  * completed and if needed, also for RX of buffered frames.
1185                  */
1186                 ath9k_ps_wakeup(sc);
1187                 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
1188                         ath9k_hw_setrxabort(sc->sc_ah, 0);
1189                 if (ieee80211_is_pspoll(hdr->frame_control)) {
1190                         ath_dbg(common, ATH_DBG_PS,
1191                                 "Sending PS-Poll to pick a buffered frame\n");
1192                         sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA;
1193                 } else {
1194                         ath_dbg(common, ATH_DBG_PS,
1195                                 "Wake up to complete TX\n");
1196                         sc->ps_flags |= PS_WAIT_FOR_TX_ACK;
1197                 }
1198                 /*
1199                  * The actual restore operation will happen only after
1200                  * the sc_flags bit is cleared. We are just dropping
1201                  * the ps_usecount here.
1202                  */
1203                 ath9k_ps_restore(sc);
1204         }
1205
1206         memset(&txctl, 0, sizeof(struct ath_tx_control));
1207         txctl.txq = sc->tx.txq_map[skb_get_queue_mapping(skb)];
1208
1209         ath_dbg(common, ATH_DBG_XMIT, "transmitting packet, skb: %p\n", skb);
1210
1211         if (ath_tx_start(hw, skb, &txctl) != 0) {
1212                 ath_dbg(common, ATH_DBG_XMIT, "TX failed\n");
1213                 goto exit;
1214         }
1215
1216         return;
1217 exit:
1218         dev_kfree_skb_any(skb);
1219 }
1220
1221 static void ath9k_stop(struct ieee80211_hw *hw)
1222 {
1223         struct ath_softc *sc = hw->priv;
1224         struct ath_hw *ah = sc->sc_ah;
1225         struct ath_common *common = ath9k_hw_common(ah);
1226
1227         mutex_lock(&sc->mutex);
1228
1229         cancel_delayed_work_sync(&sc->tx_complete_work);
1230         cancel_delayed_work_sync(&sc->hw_pll_work);
1231         cancel_work_sync(&sc->paprd_work);
1232         cancel_work_sync(&sc->hw_check_work);
1233
1234         if (sc->sc_flags & SC_OP_INVALID) {
1235                 ath_dbg(common, ATH_DBG_ANY, "Device not present\n");
1236                 mutex_unlock(&sc->mutex);
1237                 return;
1238         }
1239
1240         /* Ensure HW is awake when we try to shut it down. */
1241         ath9k_ps_wakeup(sc);
1242
1243         if (ah->btcoex_hw.enabled) {
1244                 ath9k_hw_btcoex_disable(ah);
1245                 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
1246                         ath9k_btcoex_timer_pause(sc);
1247         }
1248
1249         spin_lock_bh(&sc->sc_pcu_lock);
1250
1251         /* prevent tasklets to enable interrupts once we disable them */
1252         ah->imask &= ~ATH9K_INT_GLOBAL;
1253
1254         /* make sure h/w will not generate any interrupt
1255          * before setting the invalid flag. */
1256         ath9k_hw_disable_interrupts(ah);
1257
1258         if (!(sc->sc_flags & SC_OP_INVALID)) {
1259                 ath_drain_all_txq(sc, false);
1260                 ath_stoprecv(sc);
1261                 ath9k_hw_phy_disable(ah);
1262         } else
1263                 sc->rx.rxlink = NULL;
1264
1265         if (sc->rx.frag) {
1266                 dev_kfree_skb_any(sc->rx.frag);
1267                 sc->rx.frag = NULL;
1268         }
1269
1270         /* disable HAL and put h/w to sleep */
1271         ath9k_hw_disable(ah);
1272
1273         spin_unlock_bh(&sc->sc_pcu_lock);
1274
1275         /* we can now sync irq and kill any running tasklets, since we already
1276          * disabled interrupts and not holding a spin lock */
1277         synchronize_irq(sc->irq);
1278         tasklet_kill(&sc->intr_tq);
1279         tasklet_kill(&sc->bcon_tasklet);
1280
1281         ath9k_ps_restore(sc);
1282
1283         sc->ps_idle = true;
1284         ath_radio_disable(sc, hw);
1285
1286         sc->sc_flags |= SC_OP_INVALID;
1287
1288         mutex_unlock(&sc->mutex);
1289
1290         ath_dbg(common, ATH_DBG_CONFIG, "Driver halt\n");
1291 }
1292
1293 bool ath9k_uses_beacons(int type)
1294 {
1295         switch (type) {
1296         case NL80211_IFTYPE_AP:
1297         case NL80211_IFTYPE_ADHOC:
1298         case NL80211_IFTYPE_MESH_POINT:
1299                 return true;
1300         default:
1301                 return false;
1302         }
1303 }
1304
1305 static void ath9k_reclaim_beacon(struct ath_softc *sc,
1306                                  struct ieee80211_vif *vif)
1307 {
1308         struct ath_vif *avp = (void *)vif->drv_priv;
1309
1310         ath9k_set_beaconing_status(sc, false);
1311         ath_beacon_return(sc, avp);
1312         ath9k_set_beaconing_status(sc, true);
1313         sc->sc_flags &= ~SC_OP_BEACONS;
1314 }
1315
1316 static void ath9k_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1317 {
1318         struct ath9k_vif_iter_data *iter_data = data;
1319         int i;
1320
1321         if (iter_data->hw_macaddr)
1322                 for (i = 0; i < ETH_ALEN; i++)
1323                         iter_data->mask[i] &=
1324                                 ~(iter_data->hw_macaddr[i] ^ mac[i]);
1325
1326         switch (vif->type) {
1327         case NL80211_IFTYPE_AP:
1328                 iter_data->naps++;
1329                 break;
1330         case NL80211_IFTYPE_STATION:
1331                 iter_data->nstations++;
1332                 break;
1333         case NL80211_IFTYPE_ADHOC:
1334                 iter_data->nadhocs++;
1335                 break;
1336         case NL80211_IFTYPE_MESH_POINT:
1337                 iter_data->nmeshes++;
1338                 break;
1339         case NL80211_IFTYPE_WDS:
1340                 iter_data->nwds++;
1341                 break;
1342         default:
1343                 iter_data->nothers++;
1344                 break;
1345         }
1346 }
1347
1348 /* Called with sc->mutex held. */
1349 void ath9k_calculate_iter_data(struct ieee80211_hw *hw,
1350                                struct ieee80211_vif *vif,
1351                                struct ath9k_vif_iter_data *iter_data)
1352 {
1353         struct ath_softc *sc = hw->priv;
1354         struct ath_hw *ah = sc->sc_ah;
1355         struct ath_common *common = ath9k_hw_common(ah);
1356
1357         /*
1358          * Use the hardware MAC address as reference, the hardware uses it
1359          * together with the BSSID mask when matching addresses.
1360          */
1361         memset(iter_data, 0, sizeof(*iter_data));
1362         iter_data->hw_macaddr = common->macaddr;
1363         memset(&iter_data->mask, 0xff, ETH_ALEN);
1364
1365         if (vif)
1366                 ath9k_vif_iter(iter_data, vif->addr, vif);
1367
1368         /* Get list of all active MAC addresses */
1369         ieee80211_iterate_active_interfaces_atomic(sc->hw, ath9k_vif_iter,
1370                                                    iter_data);
1371 }
1372
1373 /* Called with sc->mutex held. */
1374 static void ath9k_calculate_summary_state(struct ieee80211_hw *hw,
1375                                           struct ieee80211_vif *vif)
1376 {
1377         struct ath_softc *sc = hw->priv;
1378         struct ath_hw *ah = sc->sc_ah;
1379         struct ath_common *common = ath9k_hw_common(ah);
1380         struct ath9k_vif_iter_data iter_data;
1381
1382         ath9k_calculate_iter_data(hw, vif, &iter_data);
1383
1384         /* Set BSSID mask. */
1385         memcpy(common->bssidmask, iter_data.mask, ETH_ALEN);
1386         ath_hw_setbssidmask(common);
1387
1388         /* Set op-mode & TSF */
1389         if (iter_data.naps > 0) {
1390                 ath9k_hw_set_tsfadjust(ah, 1);
1391                 sc->sc_flags |= SC_OP_TSF_RESET;
1392                 ah->opmode = NL80211_IFTYPE_AP;
1393         } else {
1394                 ath9k_hw_set_tsfadjust(ah, 0);
1395                 sc->sc_flags &= ~SC_OP_TSF_RESET;
1396
1397                 if (iter_data.nmeshes)
1398                         ah->opmode = NL80211_IFTYPE_MESH_POINT;
1399                 else if (iter_data.nwds)
1400                         ah->opmode = NL80211_IFTYPE_AP;
1401                 else if (iter_data.nadhocs)
1402                         ah->opmode = NL80211_IFTYPE_ADHOC;
1403                 else
1404                         ah->opmode = NL80211_IFTYPE_STATION;
1405         }
1406
1407         /*
1408          * Enable MIB interrupts when there are hardware phy counters.
1409          */
1410         if ((iter_data.nstations + iter_data.nadhocs + iter_data.nmeshes) > 0) {
1411                 if (ah->config.enable_ani)
1412                         ah->imask |= ATH9K_INT_MIB;
1413                 ah->imask |= ATH9K_INT_TSFOOR;
1414         } else {
1415                 ah->imask &= ~ATH9K_INT_MIB;
1416                 ah->imask &= ~ATH9K_INT_TSFOOR;
1417         }
1418
1419         ath9k_hw_set_interrupts(ah, ah->imask);
1420
1421         /* Set up ANI */
1422         if (iter_data.naps > 0) {
1423                 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
1424
1425                 if (!common->disable_ani) {
1426                         sc->sc_flags |= SC_OP_ANI_RUN;
1427                         ath_start_ani(common);
1428                 }
1429
1430         } else {
1431                 sc->sc_flags &= ~SC_OP_ANI_RUN;
1432                 del_timer_sync(&common->ani.timer);
1433         }
1434 }
1435
1436 /* Called with sc->mutex held, vif counts set up properly. */
1437 static void ath9k_do_vif_add_setup(struct ieee80211_hw *hw,
1438                                    struct ieee80211_vif *vif)
1439 {
1440         struct ath_softc *sc = hw->priv;
1441
1442         ath9k_calculate_summary_state(hw, vif);
1443
1444         if (ath9k_uses_beacons(vif->type)) {
1445                 int error;
1446                 /* This may fail because upper levels do not have beacons
1447                  * properly configured yet.  That's OK, we assume it
1448                  * will be properly configured and then we will be notified
1449                  * in the info_changed method and set up beacons properly
1450                  * there.
1451                  */
1452                 ath9k_set_beaconing_status(sc, false);
1453                 error = ath_beacon_alloc(sc, vif);
1454                 if (!error)
1455                         ath_beacon_config(sc, vif);
1456                 ath9k_set_beaconing_status(sc, true);
1457         }
1458 }
1459
1460
1461 static int ath9k_add_interface(struct ieee80211_hw *hw,
1462                                struct ieee80211_vif *vif)
1463 {
1464         struct ath_softc *sc = hw->priv;
1465         struct ath_hw *ah = sc->sc_ah;
1466         struct ath_common *common = ath9k_hw_common(ah);
1467         int ret = 0;
1468
1469         ath9k_ps_wakeup(sc);
1470         mutex_lock(&sc->mutex);
1471
1472         switch (vif->type) {
1473         case NL80211_IFTYPE_STATION:
1474         case NL80211_IFTYPE_WDS:
1475         case NL80211_IFTYPE_ADHOC:
1476         case NL80211_IFTYPE_AP:
1477         case NL80211_IFTYPE_MESH_POINT:
1478                 break;
1479         default:
1480                 ath_err(common, "Interface type %d not yet supported\n",
1481                         vif->type);
1482                 ret = -EOPNOTSUPP;
1483                 goto out;
1484         }
1485
1486         if (ath9k_uses_beacons(vif->type)) {
1487                 if (sc->nbcnvifs >= ATH_BCBUF) {
1488                         ath_err(common, "Not enough beacon buffers when adding"
1489                                 " new interface of type: %i\n",
1490                                 vif->type);
1491                         ret = -ENOBUFS;
1492                         goto out;
1493                 }
1494         }
1495
1496         if ((ah->opmode == NL80211_IFTYPE_ADHOC) ||
1497             ((vif->type == NL80211_IFTYPE_ADHOC) &&
1498              sc->nvifs > 0)) {
1499                 ath_err(common, "Cannot create ADHOC interface when other"
1500                         " interfaces already exist.\n");
1501                 ret = -EINVAL;
1502                 goto out;
1503         }
1504
1505         ath_dbg(common, ATH_DBG_CONFIG,
1506                 "Attach a VIF of type: %d\n", vif->type);
1507
1508         sc->nvifs++;
1509
1510         ath9k_do_vif_add_setup(hw, vif);
1511 out:
1512         mutex_unlock(&sc->mutex);
1513         ath9k_ps_restore(sc);
1514         return ret;
1515 }
1516
1517 static int ath9k_change_interface(struct ieee80211_hw *hw,
1518                                   struct ieee80211_vif *vif,
1519                                   enum nl80211_iftype new_type,
1520                                   bool p2p)
1521 {
1522         struct ath_softc *sc = hw->priv;
1523         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1524         int ret = 0;
1525
1526         ath_dbg(common, ATH_DBG_CONFIG, "Change Interface\n");
1527         mutex_lock(&sc->mutex);
1528         ath9k_ps_wakeup(sc);
1529
1530         /* See if new interface type is valid. */
1531         if ((new_type == NL80211_IFTYPE_ADHOC) &&
1532             (sc->nvifs > 1)) {
1533                 ath_err(common, "When using ADHOC, it must be the only"
1534                         " interface.\n");
1535                 ret = -EINVAL;
1536                 goto out;
1537         }
1538
1539         if (ath9k_uses_beacons(new_type) &&
1540             !ath9k_uses_beacons(vif->type)) {
1541                 if (sc->nbcnvifs >= ATH_BCBUF) {
1542                         ath_err(common, "No beacon slot available\n");
1543                         ret = -ENOBUFS;
1544                         goto out;
1545                 }
1546         }
1547
1548         /* Clean up old vif stuff */
1549         if (ath9k_uses_beacons(vif->type))
1550                 ath9k_reclaim_beacon(sc, vif);
1551
1552         /* Add new settings */
1553         vif->type = new_type;
1554         vif->p2p = p2p;
1555
1556         ath9k_do_vif_add_setup(hw, vif);
1557 out:
1558         ath9k_ps_restore(sc);
1559         mutex_unlock(&sc->mutex);
1560         return ret;
1561 }
1562
1563 static void ath9k_remove_interface(struct ieee80211_hw *hw,
1564                                    struct ieee80211_vif *vif)
1565 {
1566         struct ath_softc *sc = hw->priv;
1567         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1568
1569         ath_dbg(common, ATH_DBG_CONFIG, "Detach Interface\n");
1570
1571         ath9k_ps_wakeup(sc);
1572         mutex_lock(&sc->mutex);
1573
1574         sc->nvifs--;
1575
1576         /* Reclaim beacon resources */
1577         if (ath9k_uses_beacons(vif->type))
1578                 ath9k_reclaim_beacon(sc, vif);
1579
1580         ath9k_calculate_summary_state(hw, NULL);
1581
1582         mutex_unlock(&sc->mutex);
1583         ath9k_ps_restore(sc);
1584 }
1585
1586 static void ath9k_enable_ps(struct ath_softc *sc)
1587 {
1588         struct ath_hw *ah = sc->sc_ah;
1589
1590         sc->ps_enabled = true;
1591         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1592                 if ((ah->imask & ATH9K_INT_TIM_TIMER) == 0) {
1593                         ah->imask |= ATH9K_INT_TIM_TIMER;
1594                         ath9k_hw_set_interrupts(ah, ah->imask);
1595                 }
1596                 ath9k_hw_setrxabort(ah, 1);
1597         }
1598 }
1599
1600 static void ath9k_disable_ps(struct ath_softc *sc)
1601 {
1602         struct ath_hw *ah = sc->sc_ah;
1603
1604         sc->ps_enabled = false;
1605         ath9k_hw_setpower(ah, ATH9K_PM_AWAKE);
1606         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1607                 ath9k_hw_setrxabort(ah, 0);
1608                 sc->ps_flags &= ~(PS_WAIT_FOR_BEACON |
1609                                   PS_WAIT_FOR_CAB |
1610                                   PS_WAIT_FOR_PSPOLL_DATA |
1611                                   PS_WAIT_FOR_TX_ACK);
1612                 if (ah->imask & ATH9K_INT_TIM_TIMER) {
1613                         ah->imask &= ~ATH9K_INT_TIM_TIMER;
1614                         ath9k_hw_set_interrupts(ah, ah->imask);
1615                 }
1616         }
1617
1618 }
1619
1620 static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
1621 {
1622         struct ath_softc *sc = hw->priv;
1623         struct ath_hw *ah = sc->sc_ah;
1624         struct ath_common *common = ath9k_hw_common(ah);
1625         struct ieee80211_conf *conf = &hw->conf;
1626         bool disable_radio = false;
1627
1628         mutex_lock(&sc->mutex);
1629
1630         /*
1631          * Leave this as the first check because we need to turn on the
1632          * radio if it was disabled before prior to processing the rest
1633          * of the changes. Likewise we must only disable the radio towards
1634          * the end.
1635          */
1636         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
1637                 sc->ps_idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1638                 if (!sc->ps_idle) {
1639                         ath_radio_enable(sc, hw);
1640                         ath_dbg(common, ATH_DBG_CONFIG,
1641                                 "not-idle: enabling radio\n");
1642                 } else {
1643                         disable_radio = true;
1644                 }
1645         }
1646
1647         /*
1648          * We just prepare to enable PS. We have to wait until our AP has
1649          * ACK'd our null data frame to disable RX otherwise we'll ignore
1650          * those ACKs and end up retransmitting the same null data frames.
1651          * IEEE80211_CONF_CHANGE_PS is only passed by mac80211 for STA mode.
1652          */
1653         if (changed & IEEE80211_CONF_CHANGE_PS) {
1654                 unsigned long flags;
1655                 spin_lock_irqsave(&sc->sc_pm_lock, flags);
1656                 if (conf->flags & IEEE80211_CONF_PS)
1657                         ath9k_enable_ps(sc);
1658                 else
1659                         ath9k_disable_ps(sc);
1660                 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1661         }
1662
1663         if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
1664                 if (conf->flags & IEEE80211_CONF_MONITOR) {
1665                         ath_dbg(common, ATH_DBG_CONFIG,
1666                                 "Monitor mode is enabled\n");
1667                         sc->sc_ah->is_monitoring = true;
1668                 } else {
1669                         ath_dbg(common, ATH_DBG_CONFIG,
1670                                 "Monitor mode is disabled\n");
1671                         sc->sc_ah->is_monitoring = false;
1672                 }
1673         }
1674
1675         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1676                 struct ieee80211_channel *curchan = hw->conf.channel;
1677                 struct ath9k_channel old_chan;
1678                 int pos = curchan->hw_value;
1679                 int old_pos = -1;
1680                 unsigned long flags;
1681
1682                 if (ah->curchan)
1683                         old_pos = ah->curchan - &ah->channels[0];
1684
1685                 if (hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)
1686                         sc->sc_flags |= SC_OP_OFFCHANNEL;
1687                 else
1688                         sc->sc_flags &= ~SC_OP_OFFCHANNEL;
1689
1690                 ath_dbg(common, ATH_DBG_CONFIG,
1691                         "Set channel: %d MHz type: %d\n",
1692                         curchan->center_freq, conf->channel_type);
1693
1694                 /* update survey stats for the old channel before switching */
1695                 spin_lock_irqsave(&common->cc_lock, flags);
1696                 ath_update_survey_stats(sc);
1697                 spin_unlock_irqrestore(&common->cc_lock, flags);
1698
1699                 /*
1700                  * Preserve the current channel values, before updating
1701                  * the same channel
1702                  */
1703                 if (old_pos == pos) {
1704                         memcpy(&old_chan, &sc->sc_ah->channels[pos],
1705                                 sizeof(struct ath9k_channel));
1706                         ah->curchan = &old_chan;
1707                 }
1708
1709                 ath9k_cmn_update_ichannel(&sc->sc_ah->channels[pos],
1710                                           curchan, conf->channel_type);
1711
1712                 /*
1713                  * If the operating channel changes, change the survey in-use flags
1714                  * along with it.
1715                  * Reset the survey data for the new channel, unless we're switching
1716                  * back to the operating channel from an off-channel operation.
1717                  */
1718                 if (!(hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) &&
1719                     sc->cur_survey != &sc->survey[pos]) {
1720
1721                         if (sc->cur_survey)
1722                                 sc->cur_survey->filled &= ~SURVEY_INFO_IN_USE;
1723
1724                         sc->cur_survey = &sc->survey[pos];
1725
1726                         memset(sc->cur_survey, 0, sizeof(struct survey_info));
1727                         sc->cur_survey->filled |= SURVEY_INFO_IN_USE;
1728                 } else if (!(sc->survey[pos].filled & SURVEY_INFO_IN_USE)) {
1729                         memset(&sc->survey[pos], 0, sizeof(struct survey_info));
1730                 }
1731
1732                 if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) {
1733                         ath_err(common, "Unable to set channel\n");
1734                         mutex_unlock(&sc->mutex);
1735                         return -EINVAL;
1736                 }
1737
1738                 /*
1739                  * The most recent snapshot of channel->noisefloor for the old
1740                  * channel is only available after the hardware reset. Copy it to
1741                  * the survey stats now.
1742                  */
1743                 if (old_pos >= 0)
1744                         ath_update_survey_nf(sc, old_pos);
1745         }
1746
1747         if (changed & IEEE80211_CONF_CHANGE_POWER) {
1748                 ath_dbg(common, ATH_DBG_CONFIG,
1749                         "Set power: %d\n", conf->power_level);
1750                 sc->config.txpowlimit = 2 * conf->power_level;
1751                 ath9k_ps_wakeup(sc);
1752                 ath9k_cmn_update_txpow(ah, sc->curtxpow,
1753                                        sc->config.txpowlimit, &sc->curtxpow);
1754                 ath9k_ps_restore(sc);
1755         }
1756
1757         if (disable_radio) {
1758                 ath_dbg(common, ATH_DBG_CONFIG, "idle: disabling radio\n");
1759                 ath_radio_disable(sc, hw);
1760         }
1761
1762         mutex_unlock(&sc->mutex);
1763
1764         return 0;
1765 }
1766
1767 #define SUPPORTED_FILTERS                       \
1768         (FIF_PROMISC_IN_BSS |                   \
1769         FIF_ALLMULTI |                          \
1770         FIF_CONTROL |                           \
1771         FIF_PSPOLL |                            \
1772         FIF_OTHER_BSS |                         \
1773         FIF_BCN_PRBRESP_PROMISC |               \
1774         FIF_PROBE_REQ |                         \
1775         FIF_FCSFAIL)
1776
1777 /* FIXME: sc->sc_full_reset ? */
1778 static void ath9k_configure_filter(struct ieee80211_hw *hw,
1779                                    unsigned int changed_flags,
1780                                    unsigned int *total_flags,
1781                                    u64 multicast)
1782 {
1783         struct ath_softc *sc = hw->priv;
1784         u32 rfilt;
1785
1786         changed_flags &= SUPPORTED_FILTERS;
1787         *total_flags &= SUPPORTED_FILTERS;
1788
1789         sc->rx.rxfilter = *total_flags;
1790         ath9k_ps_wakeup(sc);
1791         rfilt = ath_calcrxfilter(sc);
1792         ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1793         ath9k_ps_restore(sc);
1794
1795         ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_CONFIG,
1796                 "Set HW RX filter: 0x%x\n", rfilt);
1797 }
1798
1799 static int ath9k_sta_add(struct ieee80211_hw *hw,
1800                          struct ieee80211_vif *vif,
1801                          struct ieee80211_sta *sta)
1802 {
1803         struct ath_softc *sc = hw->priv;
1804         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1805         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1806         struct ieee80211_key_conf ps_key = { };
1807
1808         ath_node_attach(sc, sta);
1809
1810         if (vif->type != NL80211_IFTYPE_AP &&
1811             vif->type != NL80211_IFTYPE_AP_VLAN)
1812                 return 0;
1813
1814         an->ps_key = ath_key_config(common, vif, sta, &ps_key);
1815
1816         return 0;
1817 }
1818
1819 static void ath9k_del_ps_key(struct ath_softc *sc,
1820                              struct ieee80211_vif *vif,
1821                              struct ieee80211_sta *sta)
1822 {
1823         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1824         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1825         struct ieee80211_key_conf ps_key = { .hw_key_idx = an->ps_key };
1826
1827         if (!an->ps_key)
1828             return;
1829
1830         ath_key_delete(common, &ps_key);
1831 }
1832
1833 static int ath9k_sta_remove(struct ieee80211_hw *hw,
1834                             struct ieee80211_vif *vif,
1835                             struct ieee80211_sta *sta)
1836 {
1837         struct ath_softc *sc = hw->priv;
1838
1839         ath9k_del_ps_key(sc, vif, sta);
1840         ath_node_detach(sc, sta);
1841
1842         return 0;
1843 }
1844
1845 static void ath9k_sta_notify(struct ieee80211_hw *hw,
1846                          struct ieee80211_vif *vif,
1847                          enum sta_notify_cmd cmd,
1848                          struct ieee80211_sta *sta)
1849 {
1850         struct ath_softc *sc = hw->priv;
1851         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1852
1853         switch (cmd) {
1854         case STA_NOTIFY_SLEEP:
1855                 an->sleeping = true;
1856                 if (ath_tx_aggr_sleep(sc, an))
1857                         ieee80211_sta_set_tim(sta);
1858                 break;
1859         case STA_NOTIFY_AWAKE:
1860                 an->sleeping = false;
1861                 ath_tx_aggr_wakeup(sc, an);
1862                 break;
1863         }
1864 }
1865
1866 static int ath9k_conf_tx(struct ieee80211_hw *hw, u16 queue,
1867                          const struct ieee80211_tx_queue_params *params)
1868 {
1869         struct ath_softc *sc = hw->priv;
1870         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1871         struct ath_txq *txq;
1872         struct ath9k_tx_queue_info qi;
1873         int ret = 0;
1874
1875         if (queue >= WME_NUM_AC)
1876                 return 0;
1877
1878         txq = sc->tx.txq_map[queue];
1879
1880         ath9k_ps_wakeup(sc);
1881         mutex_lock(&sc->mutex);
1882
1883         memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
1884
1885         qi.tqi_aifs = params->aifs;
1886         qi.tqi_cwmin = params->cw_min;
1887         qi.tqi_cwmax = params->cw_max;
1888         qi.tqi_burstTime = params->txop;
1889
1890         ath_dbg(common, ATH_DBG_CONFIG,
1891                 "Configure tx [queue/halq] [%d/%d], aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
1892                 queue, txq->axq_qnum, params->aifs, params->cw_min,
1893                 params->cw_max, params->txop);
1894
1895         ret = ath_txq_update(sc, txq->axq_qnum, &qi);
1896         if (ret)
1897                 ath_err(common, "TXQ Update failed\n");
1898
1899         if (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC)
1900                 if (queue == WME_AC_BE && !ret)
1901                         ath_beaconq_config(sc);
1902
1903         mutex_unlock(&sc->mutex);
1904         ath9k_ps_restore(sc);
1905
1906         return ret;
1907 }
1908
1909 static int ath9k_set_key(struct ieee80211_hw *hw,
1910                          enum set_key_cmd cmd,
1911                          struct ieee80211_vif *vif,
1912                          struct ieee80211_sta *sta,
1913                          struct ieee80211_key_conf *key)
1914 {
1915         struct ath_softc *sc = hw->priv;
1916         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1917         int ret = 0;
1918
1919         if (ath9k_modparam_nohwcrypt)
1920                 return -ENOSPC;
1921
1922         if (vif->type == NL80211_IFTYPE_ADHOC &&
1923             (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
1924              key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
1925             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
1926                 /*
1927                  * For now, disable hw crypto for the RSN IBSS group keys. This
1928                  * could be optimized in the future to use a modified key cache
1929                  * design to support per-STA RX GTK, but until that gets
1930                  * implemented, use of software crypto for group addressed
1931                  * frames is a acceptable to allow RSN IBSS to be used.
1932                  */
1933                 return -EOPNOTSUPP;
1934         }
1935
1936         mutex_lock(&sc->mutex);
1937         ath9k_ps_wakeup(sc);
1938         ath_dbg(common, ATH_DBG_CONFIG, "Set HW Key\n");
1939
1940         switch (cmd) {
1941         case SET_KEY:
1942                 if (sta)
1943                         ath9k_del_ps_key(sc, vif, sta);
1944
1945                 ret = ath_key_config(common, vif, sta, key);
1946                 if (ret >= 0) {
1947                         key->hw_key_idx = ret;
1948                         /* push IV and Michael MIC generation to stack */
1949                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1950                         if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
1951                                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1952                         if (sc->sc_ah->sw_mgmt_crypto &&
1953                             key->cipher == WLAN_CIPHER_SUITE_CCMP)
1954                                 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT;
1955                         ret = 0;
1956                 }
1957                 break;
1958         case DISABLE_KEY:
1959                 ath_key_delete(common, key);
1960                 break;
1961         default:
1962                 ret = -EINVAL;
1963         }
1964
1965         ath9k_ps_restore(sc);
1966         mutex_unlock(&sc->mutex);
1967
1968         return ret;
1969 }
1970 static void ath9k_bss_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1971 {
1972         struct ath_softc *sc = data;
1973         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1974         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1975         struct ath_vif *avp = (void *)vif->drv_priv;
1976
1977         /*
1978          * Skip iteration if primary station vif's bss info
1979          * was not changed
1980          */
1981         if (sc->sc_flags & SC_OP_PRIM_STA_VIF)
1982                 return;
1983
1984         if (bss_conf->assoc) {
1985                 sc->sc_flags |= SC_OP_PRIM_STA_VIF;
1986                 avp->primary_sta_vif = true;
1987                 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1988                 common->curaid = bss_conf->aid;
1989                 ath9k_hw_write_associd(sc->sc_ah);
1990                 ath_dbg(common, ATH_DBG_CONFIG,
1991                                 "Bss Info ASSOC %d, bssid: %pM\n",
1992                                 bss_conf->aid, common->curbssid);
1993                 ath_beacon_config(sc, vif);
1994                 /*
1995                  * Request a re-configuration of Beacon related timers
1996                  * on the receipt of the first Beacon frame (i.e.,
1997                  * after time sync with the AP).
1998                  */
1999                 sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
2000                 /* Reset rssi stats */
2001                 sc->last_rssi = ATH_RSSI_DUMMY_MARKER;
2002                 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
2003
2004                 if (!common->disable_ani) {
2005                         sc->sc_flags |= SC_OP_ANI_RUN;
2006                         ath_start_ani(common);
2007                 }
2008
2009         }
2010 }
2011
2012 static void ath9k_config_bss(struct ath_softc *sc, struct ieee80211_vif *vif)
2013 {
2014         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2015         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
2016         struct ath_vif *avp = (void *)vif->drv_priv;
2017
2018         if (sc->sc_ah->opmode != NL80211_IFTYPE_STATION)
2019                 return;
2020
2021         /* Reconfigure bss info */
2022         if (avp->primary_sta_vif && !bss_conf->assoc) {
2023                 ath_dbg(common, ATH_DBG_CONFIG,
2024                         "Bss Info DISASSOC %d, bssid %pM\n",
2025                         common->curaid, common->curbssid);
2026                 sc->sc_flags &= ~(SC_OP_PRIM_STA_VIF | SC_OP_BEACONS);
2027                 avp->primary_sta_vif = false;
2028                 memset(common->curbssid, 0, ETH_ALEN);
2029                 common->curaid = 0;
2030         }
2031
2032         ieee80211_iterate_active_interfaces_atomic(
2033                         sc->hw, ath9k_bss_iter, sc);
2034
2035         /*
2036          * None of station vifs are associated.
2037          * Clear bssid & aid
2038          */
2039         if (!(sc->sc_flags & SC_OP_PRIM_STA_VIF)) {
2040                 ath9k_hw_write_associd(sc->sc_ah);
2041                 /* Stop ANI */
2042                 sc->sc_flags &= ~SC_OP_ANI_RUN;
2043                 del_timer_sync(&common->ani.timer);
2044         }
2045 }
2046
2047 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
2048                                    struct ieee80211_vif *vif,
2049                                    struct ieee80211_bss_conf *bss_conf,
2050                                    u32 changed)
2051 {
2052         struct ath_softc *sc = hw->priv;
2053         struct ath_hw *ah = sc->sc_ah;
2054         struct ath_common *common = ath9k_hw_common(ah);
2055         struct ath_vif *avp = (void *)vif->drv_priv;
2056         int slottime;
2057         int error;
2058
2059         ath9k_ps_wakeup(sc);
2060         mutex_lock(&sc->mutex);
2061
2062         if (changed & BSS_CHANGED_BSSID) {
2063                 ath9k_config_bss(sc, vif);
2064
2065                 ath_dbg(common, ATH_DBG_CONFIG, "BSSID: %pM aid: 0x%x\n",
2066                         common->curbssid, common->curaid);
2067         }
2068
2069         if (changed & BSS_CHANGED_IBSS) {
2070                 /* There can be only one vif available */
2071                 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
2072                 common->curaid = bss_conf->aid;
2073                 ath9k_hw_write_associd(sc->sc_ah);
2074
2075                 if (bss_conf->ibss_joined) {
2076                         sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
2077
2078                         if (!common->disable_ani) {
2079                                 sc->sc_flags |= SC_OP_ANI_RUN;
2080                                 ath_start_ani(common);
2081                         }
2082
2083                 } else {
2084                         sc->sc_flags &= ~SC_OP_ANI_RUN;
2085                         del_timer_sync(&common->ani.timer);
2086                 }
2087         }
2088
2089         /* Enable transmission of beacons (AP, IBSS, MESH) */
2090         if ((changed & BSS_CHANGED_BEACON) ||
2091             ((changed & BSS_CHANGED_BEACON_ENABLED) && bss_conf->enable_beacon)) {
2092                 ath9k_set_beaconing_status(sc, false);
2093                 error = ath_beacon_alloc(sc, vif);
2094                 if (!error)
2095                         ath_beacon_config(sc, vif);
2096                 ath9k_set_beaconing_status(sc, true);
2097         }
2098
2099         if (changed & BSS_CHANGED_ERP_SLOT) {
2100                 if (bss_conf->use_short_slot)
2101                         slottime = 9;
2102                 else
2103                         slottime = 20;
2104                 if (vif->type == NL80211_IFTYPE_AP) {
2105                         /*
2106                          * Defer update, so that connected stations can adjust
2107                          * their settings at the same time.
2108                          * See beacon.c for more details
2109                          */
2110                         sc->beacon.slottime = slottime;
2111                         sc->beacon.updateslot = UPDATE;
2112                 } else {
2113                         ah->slottime = slottime;
2114                         ath9k_hw_init_global_settings(ah);
2115                 }
2116         }
2117
2118         /* Disable transmission of beacons */
2119         if ((changed & BSS_CHANGED_BEACON_ENABLED) &&
2120             !bss_conf->enable_beacon) {
2121                 ath9k_set_beaconing_status(sc, false);
2122                 avp->is_bslot_active = false;
2123                 ath9k_set_beaconing_status(sc, true);
2124         }
2125
2126         if (changed & BSS_CHANGED_BEACON_INT) {
2127                 /*
2128                  * In case of AP mode, the HW TSF has to be reset
2129                  * when the beacon interval changes.
2130                  */
2131                 if (vif->type == NL80211_IFTYPE_AP) {
2132                         sc->sc_flags |= SC_OP_TSF_RESET;
2133                         ath9k_set_beaconing_status(sc, false);
2134                         error = ath_beacon_alloc(sc, vif);
2135                         if (!error)
2136                                 ath_beacon_config(sc, vif);
2137                         ath9k_set_beaconing_status(sc, true);
2138                 } else
2139                         ath_beacon_config(sc, vif);
2140         }
2141
2142         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
2143                 ath_dbg(common, ATH_DBG_CONFIG, "BSS Changed PREAMBLE %d\n",
2144                         bss_conf->use_short_preamble);
2145                 if (bss_conf->use_short_preamble)
2146                         sc->sc_flags |= SC_OP_PREAMBLE_SHORT;
2147                 else
2148                         sc->sc_flags &= ~SC_OP_PREAMBLE_SHORT;
2149         }
2150
2151         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
2152                 ath_dbg(common, ATH_DBG_CONFIG, "BSS Changed CTS PROT %d\n",
2153                         bss_conf->use_cts_prot);
2154                 if (bss_conf->use_cts_prot &&
2155                     hw->conf.channel->band != IEEE80211_BAND_5GHZ)
2156                         sc->sc_flags |= SC_OP_PROTECT_ENABLE;
2157                 else
2158                         sc->sc_flags &= ~SC_OP_PROTECT_ENABLE;
2159         }
2160
2161         mutex_unlock(&sc->mutex);
2162         ath9k_ps_restore(sc);
2163 }
2164
2165 static u64 ath9k_get_tsf(struct ieee80211_hw *hw)
2166 {
2167         struct ath_softc *sc = hw->priv;
2168         u64 tsf;
2169
2170         mutex_lock(&sc->mutex);
2171         ath9k_ps_wakeup(sc);
2172         tsf = ath9k_hw_gettsf64(sc->sc_ah);
2173         ath9k_ps_restore(sc);
2174         mutex_unlock(&sc->mutex);
2175
2176         return tsf;
2177 }
2178
2179 static void ath9k_set_tsf(struct ieee80211_hw *hw, u64 tsf)
2180 {
2181         struct ath_softc *sc = hw->priv;
2182
2183         mutex_lock(&sc->mutex);
2184         ath9k_ps_wakeup(sc);
2185         ath9k_hw_settsf64(sc->sc_ah, tsf);
2186         ath9k_ps_restore(sc);
2187         mutex_unlock(&sc->mutex);
2188 }
2189
2190 static void ath9k_reset_tsf(struct ieee80211_hw *hw)
2191 {
2192         struct ath_softc *sc = hw->priv;
2193
2194         mutex_lock(&sc->mutex);
2195
2196         ath9k_ps_wakeup(sc);
2197         ath9k_hw_reset_tsf(sc->sc_ah);
2198         ath9k_ps_restore(sc);
2199
2200         mutex_unlock(&sc->mutex);
2201 }
2202
2203 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
2204                               struct ieee80211_vif *vif,
2205                               enum ieee80211_ampdu_mlme_action action,
2206                               struct ieee80211_sta *sta,
2207                               u16 tid, u16 *ssn, u8 buf_size)
2208 {
2209         struct ath_softc *sc = hw->priv;
2210         int ret = 0;
2211
2212         local_bh_disable();
2213
2214         switch (action) {
2215         case IEEE80211_AMPDU_RX_START:
2216                 if (!(sc->sc_flags & SC_OP_RXAGGR))
2217                         ret = -ENOTSUPP;
2218                 break;
2219         case IEEE80211_AMPDU_RX_STOP:
2220                 break;
2221         case IEEE80211_AMPDU_TX_START:
2222                 if (!(sc->sc_flags & SC_OP_TXAGGR))
2223                         return -EOPNOTSUPP;
2224
2225                 ath9k_ps_wakeup(sc);
2226                 ret = ath_tx_aggr_start(sc, sta, tid, ssn);
2227                 if (!ret)
2228                         ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2229                 ath9k_ps_restore(sc);
2230                 break;
2231         case IEEE80211_AMPDU_TX_STOP:
2232                 ath9k_ps_wakeup(sc);
2233                 ath_tx_aggr_stop(sc, sta, tid);
2234                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2235                 ath9k_ps_restore(sc);
2236                 break;
2237         case IEEE80211_AMPDU_TX_OPERATIONAL:
2238                 ath9k_ps_wakeup(sc);
2239                 ath_tx_aggr_resume(sc, sta, tid);
2240                 ath9k_ps_restore(sc);
2241                 break;
2242         default:
2243                 ath_err(ath9k_hw_common(sc->sc_ah), "Unknown AMPDU action\n");
2244         }
2245
2246         local_bh_enable();
2247
2248         return ret;
2249 }
2250
2251 static int ath9k_get_survey(struct ieee80211_hw *hw, int idx,
2252                              struct survey_info *survey)
2253 {
2254         struct ath_softc *sc = hw->priv;
2255         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2256         struct ieee80211_supported_band *sband;
2257         struct ieee80211_channel *chan;
2258         unsigned long flags;
2259         int pos;
2260
2261         spin_lock_irqsave(&common->cc_lock, flags);
2262         if (idx == 0)
2263                 ath_update_survey_stats(sc);
2264
2265         sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ];
2266         if (sband && idx >= sband->n_channels) {
2267                 idx -= sband->n_channels;
2268                 sband = NULL;
2269         }
2270
2271         if (!sband)
2272                 sband = hw->wiphy->bands[IEEE80211_BAND_5GHZ];
2273
2274         if (!sband || idx >= sband->n_channels) {
2275                 spin_unlock_irqrestore(&common->cc_lock, flags);
2276                 return -ENOENT;
2277         }
2278
2279         chan = &sband->channels[idx];
2280         pos = chan->hw_value;
2281         memcpy(survey, &sc->survey[pos], sizeof(*survey));
2282         survey->channel = chan;
2283         spin_unlock_irqrestore(&common->cc_lock, flags);
2284
2285         return 0;
2286 }
2287
2288 static void ath9k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
2289 {
2290         struct ath_softc *sc = hw->priv;
2291         struct ath_hw *ah = sc->sc_ah;
2292
2293         mutex_lock(&sc->mutex);
2294         ah->coverage_class = coverage_class;
2295         ath9k_hw_init_global_settings(ah);
2296         mutex_unlock(&sc->mutex);
2297 }
2298
2299 static void ath9k_flush(struct ieee80211_hw *hw, bool drop)
2300 {
2301         struct ath_softc *sc = hw->priv;
2302         struct ath_hw *ah = sc->sc_ah;
2303         struct ath_common *common = ath9k_hw_common(ah);
2304         int timeout = 200; /* ms */
2305         int i, j;
2306         bool drain_txq;
2307
2308         mutex_lock(&sc->mutex);
2309         cancel_delayed_work_sync(&sc->tx_complete_work);
2310
2311         if (sc->sc_flags & SC_OP_INVALID) {
2312                 ath_dbg(common, ATH_DBG_ANY, "Device not present\n");
2313                 mutex_unlock(&sc->mutex);
2314                 return;
2315         }
2316
2317         if (drop)
2318                 timeout = 1;
2319
2320         for (j = 0; j < timeout; j++) {
2321                 bool npend = false;
2322
2323                 if (j)
2324                         usleep_range(1000, 2000);
2325
2326                 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
2327                         if (!ATH_TXQ_SETUP(sc, i))
2328                                 continue;
2329
2330                         npend = ath9k_has_pending_frames(sc, &sc->tx.txq[i]);
2331
2332                         if (npend)
2333                                 break;
2334                 }
2335
2336                 if (!npend)
2337                     goto out;
2338         }
2339
2340         ath9k_ps_wakeup(sc);
2341         spin_lock_bh(&sc->sc_pcu_lock);
2342         drain_txq = ath_drain_all_txq(sc, false);
2343         if (!drain_txq)
2344                 ath_reset(sc, false);
2345         spin_unlock_bh(&sc->sc_pcu_lock);
2346         ath9k_ps_restore(sc);
2347         ieee80211_wake_queues(hw);
2348
2349 out:
2350         ieee80211_queue_delayed_work(hw, &sc->tx_complete_work, 0);
2351         mutex_unlock(&sc->mutex);
2352 }
2353
2354 static bool ath9k_tx_frames_pending(struct ieee80211_hw *hw)
2355 {
2356         struct ath_softc *sc = hw->priv;
2357         int i;
2358
2359         for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
2360                 if (!ATH_TXQ_SETUP(sc, i))
2361                         continue;
2362
2363                 if (ath9k_has_pending_frames(sc, &sc->tx.txq[i]))
2364                         return true;
2365         }
2366         return false;
2367 }
2368
2369 static int ath9k_tx_last_beacon(struct ieee80211_hw *hw)
2370 {
2371         struct ath_softc *sc = hw->priv;
2372         struct ath_hw *ah = sc->sc_ah;
2373         struct ieee80211_vif *vif;
2374         struct ath_vif *avp;
2375         struct ath_buf *bf;
2376         struct ath_tx_status ts;
2377         int status;
2378
2379         vif = sc->beacon.bslot[0];
2380         if (!vif)
2381                 return 0;
2382
2383         avp = (void *)vif->drv_priv;
2384         if (!avp->is_bslot_active)
2385                 return 0;
2386
2387         if (!sc->beacon.tx_processed) {
2388                 tasklet_disable(&sc->bcon_tasklet);
2389
2390                 bf = avp->av_bcbuf;
2391                 if (!bf || !bf->bf_mpdu)
2392                         goto skip;
2393
2394                 status = ath9k_hw_txprocdesc(ah, bf->bf_desc, &ts);
2395                 if (status == -EINPROGRESS)
2396                         goto skip;
2397
2398                 sc->beacon.tx_processed = true;
2399                 sc->beacon.tx_last = !(ts.ts_status & ATH9K_TXERR_MASK);
2400
2401 skip:
2402                 tasklet_enable(&sc->bcon_tasklet);
2403         }
2404
2405         return sc->beacon.tx_last;
2406 }
2407
2408 static int ath9k_get_stats(struct ieee80211_hw *hw,
2409                            struct ieee80211_low_level_stats *stats)
2410 {
2411         struct ath_softc *sc = hw->priv;
2412         struct ath_hw *ah = sc->sc_ah;
2413         struct ath9k_mib_stats *mib_stats = &ah->ah_mibStats;
2414
2415         stats->dot11ACKFailureCount = mib_stats->ackrcv_bad;
2416         stats->dot11RTSFailureCount = mib_stats->rts_bad;
2417         stats->dot11FCSErrorCount = mib_stats->fcs_bad;
2418         stats->dot11RTSSuccessCount = mib_stats->rts_good;
2419         return 0;
2420 }
2421
2422 struct ieee80211_ops ath9k_ops = {
2423         .tx                 = ath9k_tx,
2424         .start              = ath9k_start,
2425         .stop               = ath9k_stop,
2426         .add_interface      = ath9k_add_interface,
2427         .change_interface   = ath9k_change_interface,
2428         .remove_interface   = ath9k_remove_interface,
2429         .config             = ath9k_config,
2430         .configure_filter   = ath9k_configure_filter,
2431         .sta_add            = ath9k_sta_add,
2432         .sta_remove         = ath9k_sta_remove,
2433         .sta_notify         = ath9k_sta_notify,
2434         .conf_tx            = ath9k_conf_tx,
2435         .bss_info_changed   = ath9k_bss_info_changed,
2436         .set_key            = ath9k_set_key,
2437         .get_tsf            = ath9k_get_tsf,
2438         .set_tsf            = ath9k_set_tsf,
2439         .reset_tsf          = ath9k_reset_tsf,
2440         .ampdu_action       = ath9k_ampdu_action,
2441         .get_survey         = ath9k_get_survey,
2442         .rfkill_poll        = ath9k_rfkill_poll_state,
2443         .set_coverage_class = ath9k_set_coverage_class,
2444         .flush              = ath9k_flush,
2445         .tx_frames_pending  = ath9k_tx_frames_pending,
2446         .tx_last_beacon     = ath9k_tx_last_beacon,
2447         .get_stats          = ath9k_get_stats,
2448 };