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

   1 /*
   2  * Copyright (c) 2008-2009 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 "ath9k.h"
  19 #include "btcoex.h"
  20
  21 static void ath_update_txpow(struct ath_softc *sc)
  22 {
  23         struct ath_hw *ah = sc->sc_ah;
  24
  25         if (sc->curtxpow != sc->config.txpowlimit) {
  26                 ath9k_hw_set_txpowerlimit(ah, sc->config.txpowlimit, false);
  27                 /* read back in case value is clamped */
  28                 sc->curtxpow = ath9k_hw_regulatory(ah)->power_limit;
  29         }
  30 }
  31
  32 static u8 parse_mpdudensity(u8 mpdudensity)
  33 {
  34         /*
  35          * 802.11n D2.0 defined values for "Minimum MPDU Start Spacing":
  36          *   0 for no restriction
  37          *   1 for 1/4 us
  38          *   2 for 1/2 us
  39          *   3 for 1 us
  40          *   4 for 2 us
  41          *   5 for 4 us
  42          *   6 for 8 us
  43          *   7 for 16 us
  44          */
  45         switch (mpdudensity) {
  46         case 0:
  47                 return 0;
  48         case 1:
  49         case 2:
  50         case 3:
  51                 /* Our lower layer calculations limit our precision to
  52                    1 microsecond */
  53                 return 1;
  54         case 4:
  55                 return 2;
  56         case 5:
  57                 return 4;
  58         case 6:
  59                 return 8;
  60         case 7:
  61                 return 16;
  62         default:
  63                 return 0;
  64         }
  65 }
  66
  67 static struct ath9k_channel *ath_get_curchannel(struct ath_softc *sc,
  68                                                 struct ieee80211_hw *hw)
  69 {
  70         struct ieee80211_channel *curchan = hw->conf.channel;
  71         struct ath9k_channel *channel;
  72         u8 chan_idx;
  73
  74         chan_idx = curchan->hw_value;
  75         channel = &sc->sc_ah->channels[chan_idx];
  76         ath9k_update_ichannel(sc, hw, channel);
  77         return channel;
  78 }
  79
  80 bool ath9k_setpower(struct ath_softc *sc, enum ath9k_power_mode mode)
  81 {
  82         unsigned long flags;
  83         bool ret;
  84
  85         spin_lock_irqsave(&sc->sc_pm_lock, flags);
  86         ret = ath9k_hw_setpower(sc->sc_ah, mode);
  87         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
  88
  89         return ret;
  90 }
  91
  92 void ath9k_ps_wakeup(struct ath_softc *sc)
  93 {
  94         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
  95         unsigned long flags;
  96         enum ath9k_power_mode power_mode;
  97
  98         spin_lock_irqsave(&sc->sc_pm_lock, flags);
  99         if (++sc->ps_usecount != 1)
 100                 goto unlock;
 101
 102         power_mode = sc->sc_ah->power_mode;
 103         ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
 104
 105         /*
 106          * While the hardware is asleep, the cycle counters contain no
 107          * useful data. Better clear them now so that they don't mess up
 108          * survey data results.
 109          */
 110         if (power_mode != ATH9K_PM_AWAKE) {
 111                 spin_lock(&common->cc_lock);
 112                 ath_hw_cycle_counters_update(common);
 113                 memset(&common->cc_survey, 0, sizeof(common->cc_survey));
 114                 spin_unlock(&common->cc_lock);
 115         }
 116
 117  unlock:
 118         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 119 }
 120
 121 void ath9k_ps_restore(struct ath_softc *sc)
 122 {
 123         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 124         unsigned long flags;
 125
 126         spin_lock_irqsave(&sc->sc_pm_lock, flags);
 127         if (--sc->ps_usecount != 0)
 128                 goto unlock;
 129
 130         spin_lock(&common->cc_lock);
 131         ath_hw_cycle_counters_update(common);
 132         spin_unlock(&common->cc_lock);
 133
 134         if (sc->ps_idle)
 135                 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_FULL_SLEEP);
 136         else if (sc->ps_enabled &&
 137                  !(sc->ps_flags & (PS_WAIT_FOR_BEACON |
 138                               PS_WAIT_FOR_CAB |
 139                               PS_WAIT_FOR_PSPOLL_DATA |
 140                               PS_WAIT_FOR_TX_ACK)))
 141                 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_NETWORK_SLEEP);
 142
 143  unlock:
 144         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 145 }
 146
 147 static void ath_start_ani(struct ath_common *common)
 148 {
 149         struct ath_hw *ah = common->ah;
 150         unsigned long timestamp = jiffies_to_msecs(jiffies);
 151         struct ath_softc *sc = (struct ath_softc *) common->priv;
 152
 153         if (!(sc->sc_flags & SC_OP_ANI_RUN))
 154                 return;
 155
 156         if (sc->sc_flags & SC_OP_OFFCHANNEL)
 157                 return;
 158
 159         common->ani.longcal_timer = timestamp;
 160         common->ani.shortcal_timer = timestamp;
 161         common->ani.checkani_timer = timestamp;
 162
 163         mod_timer(&common->ani.timer,
 164                   jiffies +
 165                         msecs_to_jiffies((u32)ah->config.ani_poll_interval));
 166 }
 167
 168 static void ath_update_survey_nf(struct ath_softc *sc, int channel)
 169 {
 170         struct ath_hw *ah = sc->sc_ah;
 171         struct ath9k_channel *chan = &ah->channels[channel];
 172         struct survey_info *survey = &sc->survey[channel];
 173
 174         if (chan->noisefloor) {
 175                 survey->filled |= SURVEY_INFO_NOISE_DBM;
 176                 survey->noise = chan->noisefloor;
 177         }
 178 }
 179
 180 static void ath_update_survey_stats(struct ath_softc *sc)
 181 {
 182         struct ath_hw *ah = sc->sc_ah;
 183         struct ath_common *common = ath9k_hw_common(ah);
 184         int pos = ah->curchan - &ah->channels[0];
 185         struct survey_info *survey = &sc->survey[pos];
 186         struct ath_cycle_counters *cc = &common->cc_survey;
 187         unsigned int div = common->clockrate * 1000;
 188
 189         if (!ah->curchan)
 190                 return;
 191
 192         if (ah->power_mode == ATH9K_PM_AWAKE)
 193                 ath_hw_cycle_counters_update(common);
 194
 195         if (cc->cycles > 0) {
 196                 survey->filled |= SURVEY_INFO_CHANNEL_TIME |
 197                         SURVEY_INFO_CHANNEL_TIME_BUSY |
 198                         SURVEY_INFO_CHANNEL_TIME_RX |
 199                         SURVEY_INFO_CHANNEL_TIME_TX;
 200                 survey->channel_time += cc->cycles / div;
 201                 survey->channel_time_busy += cc->rx_busy / div;
 202                 survey->channel_time_rx += cc->rx_frame / div;
 203                 survey->channel_time_tx += cc->tx_frame / div;
 204         }
 205         memset(cc, 0, sizeof(*cc));
 206
 207         ath_update_survey_nf(sc, pos);
 208 }
 209
 210 /*
 211  * Set/change channels.  If the channel is really being changed, it's done
 212  * by reseting the chip.  To accomplish this we must first cleanup any pending
 213  * DMA, then restart stuff.
 214 */
 215 int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
 216                     struct ath9k_channel *hchan)
 217 {
 218         struct ath_wiphy *aphy = hw->priv;
 219         struct ath_hw *ah = sc->sc_ah;
 220         struct ath_common *common = ath9k_hw_common(ah);
 221         struct ieee80211_conf *conf = &common->hw->conf;
 222         bool fastcc = true, stopped;
 223         struct ieee80211_channel *channel = hw->conf.channel;
 224         struct ath9k_hw_cal_data *caldata = NULL;
 225         int r;
 226
 227         if (sc->sc_flags & SC_OP_INVALID)
 228                 return -EIO;
 229
 230         del_timer_sync(&common->ani.timer);
 231         cancel_work_sync(&sc->paprd_work);
 232         cancel_work_sync(&sc->hw_check_work);
 233         cancel_delayed_work_sync(&sc->tx_complete_work);
 234
 235         ath9k_ps_wakeup(sc);
 236
 237         spin_lock_bh(&sc->sc_pcu_lock);
 238
 239         /*
 240          * This is only performed if the channel settings have
 241          * actually changed.
 242          *
 243          * To switch channels clear any pending DMA operations;
 244          * wait long enough for the RX fifo to drain, reset the
 245          * hardware at the new frequency, and then re-enable
 246          * the relevant bits of the h/w.
 247          */
 248         ath9k_hw_disable_interrupts(ah);
 249         stopped = ath_drain_all_txq(sc, false);
 250
 251         if (!ath_stoprecv(sc))
 252                 stopped = false;
 253
 254         /* XXX: do not flush receive queue here. We don't want
 255          * to flush data frames already in queue because of
 256          * changing channel. */
 257
 258         if (!stopped || !(sc->sc_flags & SC_OP_OFFCHANNEL))
 259                 fastcc = false;
 260
 261         if (!(sc->sc_flags & SC_OP_OFFCHANNEL))
 262                 caldata = &aphy->caldata;
 263
 264         ath_dbg(common, ATH_DBG_CONFIG,
 265                 "(%u MHz) -> (%u MHz), conf_is_ht40: %d fastcc: %d\n",
 266                 sc->sc_ah->curchan->channel,
 267                 channel->center_freq, conf_is_ht40(conf),
 268                 fastcc);
 269
 270         r = ath9k_hw_reset(ah, hchan, caldata, fastcc);
 271         if (r) {
 272                 ath_err(common,
 273                         "Unable to reset channel (%u MHz), reset status %d\n",
 274                         channel->center_freq, r);
 275                 goto ps_restore;
 276         }
 277
 278         if (ath_startrecv(sc) != 0) {
 279                 ath_err(common, "Unable to restart recv logic\n");
 280                 r = -EIO;
 281                 goto ps_restore;
 282         }
 283
 284         ath_update_txpow(sc);
 285         ath9k_hw_set_interrupts(ah, ah->imask);
 286
 287         if (!(sc->sc_flags & (SC_OP_OFFCHANNEL))) {
 288                 if (sc->sc_flags & SC_OP_BEACONS)
 289                         ath_beacon_config(sc, NULL);
 290                 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
 291                 ath_start_ani(common);
 292         }
 293
 294  ps_restore:
 295         spin_unlock_bh(&sc->sc_pcu_lock);
 296
 297         ath9k_ps_restore(sc);
 298         return r;
 299 }
 300
 301 static void ath_paprd_activate(struct ath_softc *sc)
 302 {
 303         struct ath_hw *ah = sc->sc_ah;
 304         struct ath9k_hw_cal_data *caldata = ah->caldata;
 305         struct ath_common *common = ath9k_hw_common(ah);
 306         int chain;
 307
 308         if (!caldata || !caldata->paprd_done)
 309                 return;
 310
 311         ath9k_ps_wakeup(sc);
 312         ar9003_paprd_enable(ah, false);
 313         for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
 314                 if (!(common->tx_chainmask & BIT(chain)))
 315                         continue;
 316
 317                 ar9003_paprd_populate_single_table(ah, caldata, chain);
 318         }
 319
 320         ar9003_paprd_enable(ah, true);
 321         ath9k_ps_restore(sc);
 322 }
 323
 324 static bool ath_paprd_send_frame(struct ath_softc *sc, struct sk_buff *skb, int chain)
 325 {
 326         struct ieee80211_hw *hw = sc->hw;
 327         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
 328         struct ath_tx_control txctl;
 329         int time_left;
 330
 331         memset(&txctl, 0, sizeof(txctl));
 332         txctl.txq = sc->tx.txq_map[WME_AC_BE];
 333
 334         memset(tx_info, 0, sizeof(*tx_info));
 335         tx_info->band = hw->conf.channel->band;
 336         tx_info->flags |= IEEE80211_TX_CTL_NO_ACK;
 337         tx_info->control.rates[0].idx = 0;
 338         tx_info->control.rates[0].count = 1;
 339         tx_info->control.rates[0].flags = IEEE80211_TX_RC_MCS;
 340         tx_info->control.rates[1].idx = -1;
 341
 342         init_completion(&sc->paprd_complete);
 343         sc->paprd_pending = true;
 344         txctl.paprd = BIT(chain);
 345         if (ath_tx_start(hw, skb, &txctl) != 0)
 346                 return false;
 347
 348         time_left = wait_for_completion_timeout(&sc->paprd_complete,
 349                         msecs_to_jiffies(ATH_PAPRD_TIMEOUT));
 350         sc->paprd_pending = false;
 351
 352         if (!time_left)
 353                 ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_CALIBRATE,
 354                         "Timeout waiting for paprd training on TX chain %d\n",
 355                         chain);
 356
 357         return !!time_left;
 358 }
 359
 360 void ath_paprd_calibrate(struct work_struct *work)
 361 {
 362         struct ath_softc *sc = container_of(work, struct ath_softc, paprd_work);
 363         struct ieee80211_hw *hw = sc->hw;
 364         struct ath_hw *ah = sc->sc_ah;
 365         struct ieee80211_hdr *hdr;
 366         struct sk_buff *skb = NULL;
 367         struct ath9k_hw_cal_data *caldata = ah->caldata;
 368         struct ath_common *common = ath9k_hw_common(ah);
 369         int ftype;
 370         int chain_ok = 0;
 371         int chain;
 372         int len = 1800;
 373
 374         if (!caldata)
 375                 return;
 376
 377         if (ar9003_paprd_init_table(ah) < 0)
 378                 return;
 379
 380         skb = alloc_skb(len, GFP_KERNEL);
 381         if (!skb)
 382                 return;
 383
 384         skb_put(skb, len);
 385         memset(skb->data, 0, len);
 386         hdr = (struct ieee80211_hdr *)skb->data;
 387         ftype = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC;
 388         hdr->frame_control = cpu_to_le16(ftype);
 389         hdr->duration_id = cpu_to_le16(10);
 390         memcpy(hdr->addr1, hw->wiphy->perm_addr, ETH_ALEN);
 391         memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN);
 392         memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN);
 393
 394         ath9k_ps_wakeup(sc);
 395         for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
 396                 if (!(common->tx_chainmask & BIT(chain)))
 397                         continue;
 398
 399                 chain_ok = 0;
 400
 401                 ath_dbg(common, ATH_DBG_CALIBRATE,
 402                         "Sending PAPRD frame for thermal measurement "
 403                         "on chain %d\n", chain);
 404                 if (!ath_paprd_send_frame(sc, skb, chain))
 405                         goto fail_paprd;
 406
 407                 ar9003_paprd_setup_gain_table(ah, chain);
 408
 409                 ath_dbg(common, ATH_DBG_CALIBRATE,
 410                         "Sending PAPRD training frame on chain %d\n", chain);
 411                 if (!ath_paprd_send_frame(sc, skb, chain))
 412                         goto fail_paprd;
 413
 414                 if (!ar9003_paprd_is_done(ah))
 415                         break;
 416
 417                 if (ar9003_paprd_create_curve(ah, caldata, chain) != 0)
 418                         break;
 419
 420                 chain_ok = 1;
 421         }
 422         kfree_skb(skb);
 423
 424         if (chain_ok) {
 425                 caldata->paprd_done = true;
 426                 ath_paprd_activate(sc);
 427         }
 428
 429 fail_paprd:
 430         ath9k_ps_restore(sc);
 431 }
 432
 433 /*
 434  *  This routine performs the periodic noise floor calibration function
 435  *  that is used to adjust and optimize the chip performance.  This
 436  *  takes environmental changes (location, temperature) into account.
 437  *  When the task is complete, it reschedules itself depending on the
 438  *  appropriate interval that was calculated.
 439  */
 440 void ath_ani_calibrate(unsigned long data)
 441 {
 442         struct ath_softc *sc = (struct ath_softc *)data;
 443         struct ath_hw *ah = sc->sc_ah;
 444         struct ath_common *common = ath9k_hw_common(ah);
 445         bool longcal = false;
 446         bool shortcal = false;
 447         bool aniflag = false;
 448         unsigned int timestamp = jiffies_to_msecs(jiffies);
 449         u32 cal_interval, short_cal_interval, long_cal_interval;
 450         unsigned long flags;
 451
 452         if (ah->caldata && ah->caldata->nfcal_interference)
 453                 long_cal_interval = ATH_LONG_CALINTERVAL_INT;
 454         else
 455                 long_cal_interval = ATH_LONG_CALINTERVAL;
 456
 457         short_cal_interval = (ah->opmode == NL80211_IFTYPE_AP) ?
 458                 ATH_AP_SHORT_CALINTERVAL : ATH_STA_SHORT_CALINTERVAL;
 459
 460         /* Only calibrate if awake */
 461         if (sc->sc_ah->power_mode != ATH9K_PM_AWAKE)
 462                 goto set_timer;
 463
 464         ath9k_ps_wakeup(sc);
 465
 466         /* Long calibration runs independently of short calibration. */
 467         if ((timestamp - common->ani.longcal_timer) >= long_cal_interval) {
 468                 longcal = true;
 469                 ath_dbg(common, ATH_DBG_ANI, "longcal @%lu\n", jiffies);
 470                 common->ani.longcal_timer = timestamp;
 471         }
 472
 473         /* Short calibration applies only while caldone is false */
 474         if (!common->ani.caldone) {
 475                 if ((timestamp - common->ani.shortcal_timer) >= short_cal_interval) {
 476                         shortcal = true;
 477                         ath_dbg(common, ATH_DBG_ANI,
 478                                 "shortcal @%lu\n", jiffies);
 479                         common->ani.shortcal_timer = timestamp;
 480                         common->ani.resetcal_timer = timestamp;
 481                 }
 482         } else {
 483                 if ((timestamp - common->ani.resetcal_timer) >=
 484                     ATH_RESTART_CALINTERVAL) {
 485                         common->ani.caldone = ath9k_hw_reset_calvalid(ah);
 486                         if (common->ani.caldone)
 487                                 common->ani.resetcal_timer = timestamp;
 488                 }
 489         }
 490
 491         /* Verify whether we must check ANI */
 492         if ((timestamp - common->ani.checkani_timer) >=
 493              ah->config.ani_poll_interval) {
 494                 aniflag = true;
 495                 common->ani.checkani_timer = timestamp;
 496         }
 497
 498         /* Skip all processing if there's nothing to do. */
 499         if (longcal || shortcal || aniflag) {
 500                 /* Call ANI routine if necessary */
 501                 if (aniflag) {
 502                         spin_lock_irqsave(&common->cc_lock, flags);
 503                         ath9k_hw_ani_monitor(ah, ah->curchan);
 504                         ath_update_survey_stats(sc);
 505                         spin_unlock_irqrestore(&common->cc_lock, flags);
 506                 }
 507
 508                 /* Perform calibration if necessary */
 509                 if (longcal || shortcal) {
 510                         common->ani.caldone =
 511                                 ath9k_hw_calibrate(ah,
 512                                                    ah->curchan,
 513                                                    common->rx_chainmask,
 514                                                    longcal);
 515                 }
 516         }
 517
 518         ath9k_ps_restore(sc);
 519
 520 set_timer:
 521         /*
 522         * Set timer interval based on previous results.
 523         * The interval must be the shortest necessary to satisfy ANI,
 524         * short calibration and long calibration.
 525         */
 526         cal_interval = ATH_LONG_CALINTERVAL;
 527         if (sc->sc_ah->config.enable_ani)
 528                 cal_interval = min(cal_interval,
 529                                    (u32)ah->config.ani_poll_interval);
 530         if (!common->ani.caldone)
 531                 cal_interval = min(cal_interval, (u32)short_cal_interval);
 532
 533         mod_timer(&common->ani.timer, jiffies + msecs_to_jiffies(cal_interval));
 534         if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_PAPRD) && ah->caldata) {
 535                 if (!ah->caldata->paprd_done)
 536                         ieee80211_queue_work(sc->hw, &sc->paprd_work);
 537                 else if (!ah->paprd_table_write_done)
 538                         ath_paprd_activate(sc);
 539         }
 540 }
 541
 542 static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta)
 543 {
 544         struct ath_node *an;
 545         struct ath_hw *ah = sc->sc_ah;
 546         an = (struct ath_node *)sta->drv_priv;
 547
 548         if ((ah->caps.hw_caps) & ATH9K_HW_CAP_APM)
 549                 sc->sc_flags |= SC_OP_ENABLE_APM;
 550
 551         if (sc->sc_flags & SC_OP_TXAGGR) {
 552                 ath_tx_node_init(sc, an);
 553                 an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR +
 554                                      sta->ht_cap.ampdu_factor);
 555                 an->mpdudensity = parse_mpdudensity(sta->ht_cap.ampdu_density);
 556         }
 557 }
 558
 559 static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
 560 {
 561         struct ath_node *an = (struct ath_node *)sta->drv_priv;
 562
 563         if (sc->sc_flags & SC_OP_TXAGGR)
 564                 ath_tx_node_cleanup(sc, an);
 565 }
 566
 567 void ath_hw_check(struct work_struct *work)
 568 {
 569         struct ath_softc *sc = container_of(work, struct ath_softc, hw_check_work);
 570         int i;
 571
 572         ath9k_ps_wakeup(sc);
 573
 574         for (i = 0; i < 3; i++) {
 575                 if (ath9k_hw_check_alive(sc->sc_ah))
 576                         goto out;
 577
 578                 msleep(1);
 579         }
 580         ath_reset(sc, true);
 581
 582 out:
 583         ath9k_ps_restore(sc);
 584 }
 585
 586 void ath9k_tasklet(unsigned long data)
 587 {
 588         struct ath_softc *sc = (struct ath_softc *)data;
 589         struct ath_hw *ah = sc->sc_ah;
 590         struct ath_common *common = ath9k_hw_common(ah);
 591
 592         u32 status = sc->intrstatus;
 593         u32 rxmask;
 594
 595         ath9k_ps_wakeup(sc);
 596
 597         if (status & ATH9K_INT_FATAL) {
 598                 ath_reset(sc, true);
 599                 ath9k_ps_restore(sc);
 600                 return;
 601         }
 602
 603         spin_lock(&sc->sc_pcu_lock);
 604
 605         if (!ath9k_hw_check_alive(ah))
 606                 ieee80211_queue_work(sc->hw, &sc->hw_check_work);
 607
 608         if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
 609                 rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL |
 610                           ATH9K_INT_RXORN);
 611         else
 612                 rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
 613
 614         if (status & rxmask) {
 615                 /* Check for high priority Rx first */
 616                 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
 617                     (status & ATH9K_INT_RXHP))
 618                         ath_rx_tasklet(sc, 0, true);
 619
 620                 ath_rx_tasklet(sc, 0, false);
 621         }
 622
 623         if (status & ATH9K_INT_TX) {
 624                 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
 625                         ath_tx_edma_tasklet(sc);
 626                 else
 627                         ath_tx_tasklet(sc);
 628         }
 629
 630         if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) {
 631                 /*
 632                  * TSF sync does not look correct; remain awake to sync with
 633                  * the next Beacon.
 634                  */
 635                 ath_dbg(common, ATH_DBG_PS,
 636                         "TSFOOR - Sync with next Beacon\n");
 637                 sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC;
 638         }
 639
 640         if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
 641                 if (status & ATH9K_INT_GENTIMER)
 642                         ath_gen_timer_isr(sc->sc_ah);
 643
 644         /* re-enable hardware interrupt */
 645         ath9k_hw_enable_interrupts(ah);
 646
 647         spin_unlock(&sc->sc_pcu_lock);
 648         ath9k_ps_restore(sc);
 649 }
 650
 651 irqreturn_t ath_isr(int irq, void *dev)
 652 {
 653 #define SCHED_INTR (                            \
 654                 ATH9K_INT_FATAL |               \
 655                 ATH9K_INT_RXORN |               \
 656                 ATH9K_INT_RXEOL |               \
 657                 ATH9K_INT_RX |                  \
 658                 ATH9K_INT_RXLP |                \
 659                 ATH9K_INT_RXHP |                \
 660                 ATH9K_INT_TX |                  \
 661                 ATH9K_INT_BMISS |               \
 662                 ATH9K_INT_CST |                 \
 663                 ATH9K_INT_TSFOOR |              \
 664                 ATH9K_INT_GENTIMER)
 665
 666         struct ath_softc *sc = dev;
 667         struct ath_hw *ah = sc->sc_ah;
 668         struct ath_common *common = ath9k_hw_common(ah);
 669         enum ath9k_int status;
 670         bool sched = false;
 671
 672         /*
 673          * The hardware is not ready/present, don't
 674          * touch anything. Note this can happen early
 675          * on if the IRQ is shared.
 676          */
 677         if (sc->sc_flags & SC_OP_INVALID)
 678                 return IRQ_NONE;
 679
 680
 681         /* shared irq, not for us */
 682
 683         if (!ath9k_hw_intrpend(ah))
 684                 return IRQ_NONE;
 685
 686         /*
 687          * Figure out the reason(s) for the interrupt.  Note
 688          * that the hal returns a pseudo-ISR that may include
 689          * bits we haven't explicitly enabled so we mask the
 690          * value to insure we only process bits we requested.
 691          */
 692         ath9k_hw_getisr(ah, &status);   /* NB: clears ISR too */
 693         status &= ah->imask;    /* discard unasked-for bits */
 694
 695         /*
 696          * If there are no status bits set, then this interrupt was not
 697          * for me (should have been caught above).
 698          */
 699         if (!status)
 700                 return IRQ_NONE;
 701
 702         /* Cache the status */
 703         sc->intrstatus = status;
 704
 705         if (status & SCHED_INTR)
 706                 sched = true;
 707
 708         /*
 709          * If a FATAL or RXORN interrupt is received, we have to reset the
 710          * chip immediately.
 711          */
 712         if ((status & ATH9K_INT_FATAL) || ((status & ATH9K_INT_RXORN) &&
 713             !(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)))
 714                 goto chip_reset;
 715
 716         if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
 717             (status & ATH9K_INT_BB_WATCHDOG)) {
 718
 719                 spin_lock(&common->cc_lock);
 720                 ath_hw_cycle_counters_update(common);
 721                 ar9003_hw_bb_watchdog_dbg_info(ah);
 722                 spin_unlock(&common->cc_lock);
 723
 724                 goto chip_reset;
 725         }
 726
 727         if (status & ATH9K_INT_SWBA)
 728                 tasklet_schedule(&sc->bcon_tasklet);
 729
 730         if (status & ATH9K_INT_TXURN)
 731                 ath9k_hw_updatetxtriglevel(ah, true);
 732
 733         if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
 734                 if (status & ATH9K_INT_RXEOL) {
 735                         ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
 736                         ath9k_hw_set_interrupts(ah, ah->imask);
 737                 }
 738         }
 739
 740         if (status & ATH9K_INT_MIB) {
 741                 /*
 742                  * Disable interrupts until we service the MIB
 743                  * interrupt; otherwise it will continue to
 744                  * fire.
 745                  */
 746                 ath9k_hw_disable_interrupts(ah);
 747                 /*
 748                  * Let the hal handle the event. We assume
 749                  * it will clear whatever condition caused
 750                  * the interrupt.
 751                  */
 752                 spin_lock(&common->cc_lock);
 753                 ath9k_hw_proc_mib_event(ah);
 754                 spin_unlock(&common->cc_lock);
 755                 ath9k_hw_enable_interrupts(ah);
 756         }
 757
 758         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
 759                 if (status & ATH9K_INT_TIM_TIMER) {
 760                         if (ATH_DBG_WARN_ON_ONCE(sc->ps_idle))
 761                                 goto chip_reset;
 762                         /* Clear RxAbort bit so that we can
 763                          * receive frames */
 764                         ath9k_setpower(sc, ATH9K_PM_AWAKE);
 765                         ath9k_hw_setrxabort(sc->sc_ah, 0);
 766                         sc->ps_flags |= PS_WAIT_FOR_BEACON;
 767                 }
 768
 769 chip_reset:
 770
 771         ath_debug_stat_interrupt(sc, status);
 772
 773         if (sched) {
 774                 /* turn off every interrupt */
 775                 ath9k_hw_disable_interrupts(ah);
 776                 tasklet_schedule(&sc->intr_tq);
 777         }
 778
 779         return IRQ_HANDLED;
 780
 781 #undef SCHED_INTR
 782 }
 783
 784 static u32 ath_get_extchanmode(struct ath_softc *sc,
 785                                struct ieee80211_channel *chan,
 786                                enum nl80211_channel_type channel_type)
 787 {
 788         u32 chanmode = 0;
 789
 790         switch (chan->band) {
 791         case IEEE80211_BAND_2GHZ:
 792                 switch(channel_type) {
 793                 case NL80211_CHAN_NO_HT:
 794                 case NL80211_CHAN_HT20:
 795                         chanmode = CHANNEL_G_HT20;
 796                         break;
 797                 case NL80211_CHAN_HT40PLUS:
 798                         chanmode = CHANNEL_G_HT40PLUS;
 799                         break;
 800                 case NL80211_CHAN_HT40MINUS:
 801                         chanmode = CHANNEL_G_HT40MINUS;
 802                         break;
 803                 }
 804                 break;
 805         case IEEE80211_BAND_5GHZ:
 806                 switch(channel_type) {
 807                 case NL80211_CHAN_NO_HT:
 808                 case NL80211_CHAN_HT20:
 809                         chanmode = CHANNEL_A_HT20;
 810                         break;
 811                 case NL80211_CHAN_HT40PLUS:
 812                         chanmode = CHANNEL_A_HT40PLUS;
 813                         break;
 814                 case NL80211_CHAN_HT40MINUS:
 815                         chanmode = CHANNEL_A_HT40MINUS;
 816                         break;
 817                 }
 818                 break;
 819         default:
 820                 break;
 821         }
 822
 823         return chanmode;
 824 }
 825
 826 static void ath9k_bss_assoc_info(struct ath_softc *sc,
 827                                  struct ieee80211_hw *hw,
 828                                  struct ieee80211_vif *vif,
 829                                  struct ieee80211_bss_conf *bss_conf)
 830 {
 831         struct ath_wiphy *aphy = hw->priv;
 832         struct ath_hw *ah = sc->sc_ah;
 833         struct ath_common *common = ath9k_hw_common(ah);
 834
 835         if (bss_conf->assoc) {
 836                 ath_dbg(common, ATH_DBG_CONFIG,
 837                         "Bss Info ASSOC %d, bssid: %pM\n",
 838                         bss_conf->aid, common->curbssid);
 839
 840                 /* New association, store aid */
 841                 common->curaid = bss_conf->aid;
 842                 ath9k_hw_write_associd(ah);
 843
 844                 /*
 845                  * Request a re-configuration of Beacon related timers
 846                  * on the receipt of the first Beacon frame (i.e.,
 847                  * after time sync with the AP).
 848                  */
 849                 sc->ps_flags |= PS_BEACON_SYNC;
 850
 851                 /* Configure the beacon */
 852                 ath_beacon_config(sc, vif);
 853
 854                 /* Reset rssi stats */
 855                 aphy->last_rssi = ATH_RSSI_DUMMY_MARKER;
 856                 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
 857
 858                 sc->sc_flags |= SC_OP_ANI_RUN;
 859                 ath_start_ani(common);
 860         } else {
 861                 ath_dbg(common, ATH_DBG_CONFIG, "Bss Info DISASSOC\n");
 862                 common->curaid = 0;
 863                 /* Stop ANI */
 864                 sc->sc_flags &= ~SC_OP_ANI_RUN;
 865                 del_timer_sync(&common->ani.timer);
 866         }
 867 }
 868
 869 void ath_radio_enable(struct ath_softc *sc, struct ieee80211_hw *hw)
 870 {
 871         struct ath_hw *ah = sc->sc_ah;
 872         struct ath_common *common = ath9k_hw_common(ah);
 873         struct ieee80211_channel *channel = hw->conf.channel;
 874         int r;
 875
 876         ath9k_ps_wakeup(sc);
 877         spin_lock_bh(&sc->sc_pcu_lock);
 878
 879         ath9k_hw_configpcipowersave(ah, 0, 0);
 880
 881         if (!ah->curchan)
 882                 ah->curchan = ath_get_curchannel(sc, sc->hw);
 883
 884         r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
 885         if (r) {
 886                 ath_err(common,
 887                         "Unable to reset channel (%u MHz), reset status %d\n",
 888                         channel->center_freq, r);
 889         }
 890
 891         ath_update_txpow(sc);
 892         if (ath_startrecv(sc) != 0) {
 893                 ath_err(common, "Unable to restart recv logic\n");
 894                 goto out;
 895         }
 896         if (sc->sc_flags & SC_OP_BEACONS)
 897                 ath_beacon_config(sc, NULL);    /* restart beacons */
 898
 899         /* Re-Enable  interrupts */
 900         ath9k_hw_set_interrupts(ah, ah->imask);
 901
 902         /* Enable LED */
 903         ath9k_hw_cfg_output(ah, ah->led_pin,
 904                             AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
 905         ath9k_hw_set_gpio(ah, ah->led_pin, 0);
 906
 907         ieee80211_wake_queues(hw);
 908 out:
 909         spin_unlock_bh(&sc->sc_pcu_lock);
 910
 911         ath9k_ps_restore(sc);
 912 }
 913
 914 void ath_radio_disable(struct ath_softc *sc, struct ieee80211_hw *hw)
 915 {
 916         struct ath_hw *ah = sc->sc_ah;
 917         struct ieee80211_channel *channel = hw->conf.channel;
 918         int r;
 919
 920         ath9k_ps_wakeup(sc);
 921         spin_lock_bh(&sc->sc_pcu_lock);
 922
 923         ieee80211_stop_queues(hw);
 924
 925         /*
 926          * Keep the LED on when the radio is disabled
 927          * during idle unassociated state.
 928          */
 929         if (!sc->ps_idle) {
 930                 ath9k_hw_set_gpio(ah, ah->led_pin, 1);
 931                 ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
 932         }
 933
 934         /* Disable interrupts */
 935         ath9k_hw_disable_interrupts(ah);
 936
 937         ath_drain_all_txq(sc, false);   /* clear pending tx frames */
 938
 939         ath_stoprecv(sc);               /* turn off frame recv */
 940         ath_flushrecv(sc);              /* flush recv queue */
 941
 942         if (!ah->curchan)
 943                 ah->curchan = ath_get_curchannel(sc, hw);
 944
 945         r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
 946         if (r) {
 947                 ath_err(ath9k_hw_common(sc->sc_ah),
 948                         "Unable to reset channel (%u MHz), reset status %d\n",
 949                         channel->center_freq, r);
 950         }
 951
 952         ath9k_hw_phy_disable(ah);
 953
 954         ath9k_hw_configpcipowersave(ah, 1, 1);
 955
 956         spin_unlock_bh(&sc->sc_pcu_lock);
 957         ath9k_ps_restore(sc);
 958
 959         ath9k_setpower(sc, ATH9K_PM_FULL_SLEEP);
 960 }
 961
 962 int ath_reset(struct ath_softc *sc, bool retry_tx)
 963 {
 964         struct ath_hw *ah = sc->sc_ah;
 965         struct ath_common *common = ath9k_hw_common(ah);
 966         struct ieee80211_hw *hw = sc->hw;
 967         int r;
 968
 969         /* Stop ANI */
 970         del_timer_sync(&common->ani.timer);
 971
 972         spin_lock_bh(&sc->sc_pcu_lock);
 973
 974         ieee80211_stop_queues(hw);
 975
 976         ath9k_hw_disable_interrupts(ah);
 977         ath_drain_all_txq(sc, retry_tx);
 978
 979         ath_stoprecv(sc);
 980         ath_flushrecv(sc);
 981
 982         r = ath9k_hw_reset(ah, sc->sc_ah->curchan, ah->caldata, false);
 983         if (r)
 984                 ath_err(common,
 985                         "Unable to reset hardware; reset status %d\n", r);
 986
 987         if (ath_startrecv(sc) != 0)
 988                 ath_err(common, "Unable to start recv logic\n");
 989
 990         /*
 991          * We may be doing a reset in response to a request
 992          * that changes the channel so update any state that
 993          * might change as a result.
 994          */
 995         ath_update_txpow(sc);
 996
 997         if ((sc->sc_flags & SC_OP_BEACONS) || !(sc->sc_flags & (SC_OP_OFFCHANNEL)))
 998                 ath_beacon_config(sc, NULL);    /* restart beacons */
 999
1000         ath9k_hw_set_interrupts(ah, ah->imask);
1001
1002         if (retry_tx) {
1003                 int i;
1004                 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
1005                         if (ATH_TXQ_SETUP(sc, i)) {
1006                                 spin_lock_bh(&sc->tx.txq[i].axq_lock);
1007                                 ath_txq_schedule(sc, &sc->tx.txq[i]);
1008                                 spin_unlock_bh(&sc->tx.txq[i].axq_lock);
1009                         }
1010                 }
1011         }
1012
1013         ieee80211_wake_queues(hw);
1014         spin_unlock_bh(&sc->sc_pcu_lock);
1015
1016         /* Start ANI */
1017         ath_start_ani(common);
1018
1019         return r;
1020 }
1021
1022 /* XXX: Remove me once we don't depend on ath9k_channel for all
1023  * this redundant data */
1024 void ath9k_update_ichannel(struct ath_softc *sc, struct ieee80211_hw *hw,
1025                            struct ath9k_channel *ichan)
1026 {
1027         struct ieee80211_channel *chan = hw->conf.channel;
1028         struct ieee80211_conf *conf = &hw->conf;
1029
1030         ichan->channel = chan->center_freq;
1031         ichan->chan = chan;
1032
1033         if (chan->band == IEEE80211_BAND_2GHZ) {
1034                 ichan->chanmode = CHANNEL_G;
1035                 ichan->channelFlags = CHANNEL_2GHZ | CHANNEL_OFDM | CHANNEL_G;
1036         } else {
1037                 ichan->chanmode = CHANNEL_A;
1038                 ichan->channelFlags = CHANNEL_5GHZ | CHANNEL_OFDM;
1039         }
1040
1041         if (conf_is_ht(conf))
1042                 ichan->chanmode = ath_get_extchanmode(sc, chan,
1043                                             conf->channel_type);
1044 }
1045
1046 /**********************/
1047 /* mac80211 callbacks */
1048 /**********************/
1049
1050 static int ath9k_start(struct ieee80211_hw *hw)
1051 {
1052         struct ath_wiphy *aphy = hw->priv;
1053         struct ath_softc *sc = aphy->sc;
1054         struct ath_hw *ah = sc->sc_ah;
1055         struct ath_common *common = ath9k_hw_common(ah);
1056         struct ieee80211_channel *curchan = hw->conf.channel;
1057         struct ath9k_channel *init_channel;
1058         int r;
1059
1060         ath_dbg(common, ATH_DBG_CONFIG,
1061                 "Starting driver with initial channel: %d MHz\n",
1062                 curchan->center_freq);
1063
1064         mutex_lock(&sc->mutex);
1065
1066         if (ath9k_wiphy_started(sc)) {
1067                 if (sc->chan_idx == curchan->hw_value) {
1068                         /*
1069                          * Already on the operational channel, the new wiphy
1070                          * can be marked active.
1071                          */
1072                         aphy->state = ATH_WIPHY_ACTIVE;
1073                         ieee80211_wake_queues(hw);
1074                 } else {
1075                         /*
1076                          * Another wiphy is on another channel, start the new
1077                          * wiphy in paused state.
1078                          */
1079                         aphy->state = ATH_WIPHY_PAUSED;
1080                         ieee80211_stop_queues(hw);
1081                 }
1082                 mutex_unlock(&sc->mutex);
1083                 return 0;
1084         }
1085         aphy->state = ATH_WIPHY_ACTIVE;
1086
1087         /* setup initial channel */
1088
1089         sc->chan_idx = curchan->hw_value;
1090
1091         init_channel = ath_get_curchannel(sc, hw);
1092
1093         /* Reset SERDES registers */
1094         ath9k_hw_configpcipowersave(ah, 0, 0);
1095
1096         /*
1097          * The basic interface to setting the hardware in a good
1098          * state is ``reset''.  On return the hardware is known to
1099          * be powered up and with interrupts disabled.  This must
1100          * be followed by initialization of the appropriate bits
1101          * and then setup of the interrupt mask.
1102          */
1103         spin_lock_bh(&sc->sc_pcu_lock);
1104         r = ath9k_hw_reset(ah, init_channel, ah->caldata, false);
1105         if (r) {
1106                 ath_err(common,
1107                         "Unable to reset hardware; reset status %d (freq %u MHz)\n",
1108                         r, curchan->center_freq);
1109                 spin_unlock_bh(&sc->sc_pcu_lock);
1110                 goto mutex_unlock;
1111         }
1112
1113         /*
1114          * This is needed only to setup initial state
1115          * but it's best done after a reset.
1116          */
1117         ath_update_txpow(sc);
1118
1119         /*
1120          * Setup the hardware after reset:
1121          * The receive engine is set going.
1122          * Frame transmit is handled entirely
1123          * in the frame output path; there's nothing to do
1124          * here except setup the interrupt mask.
1125          */
1126         if (ath_startrecv(sc) != 0) {
1127                 ath_err(common, "Unable to start recv logic\n");
1128                 r = -EIO;
1129                 spin_unlock_bh(&sc->sc_pcu_lock);
1130                 goto mutex_unlock;
1131         }
1132         spin_unlock_bh(&sc->sc_pcu_lock);
1133
1134         /* Setup our intr mask. */
1135         ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL |
1136                     ATH9K_INT_RXORN | ATH9K_INT_FATAL |
1137                     ATH9K_INT_GLOBAL;
1138
1139         if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
1140                 ah->imask |= ATH9K_INT_RXHP |
1141                              ATH9K_INT_RXLP |
1142                              ATH9K_INT_BB_WATCHDOG;
1143         else
1144                 ah->imask |= ATH9K_INT_RX;
1145
1146         ah->imask |= ATH9K_INT_GTT;
1147
1148         if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
1149                 ah->imask |= ATH9K_INT_CST;
1150
1151         sc->sc_flags &= ~SC_OP_INVALID;
1152         sc->sc_ah->is_monitoring = false;
1153
1154         /* Disable BMISS interrupt when we're not associated */
1155         ah->imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
1156         ath9k_hw_set_interrupts(ah, ah->imask);
1157
1158         ieee80211_wake_queues(hw);
1159
1160         ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
1161
1162         if ((ah->btcoex_hw.scheme != ATH_BTCOEX_CFG_NONE) &&
1163             !ah->btcoex_hw.enabled) {
1164                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
1165                                            AR_STOMP_LOW_WLAN_WGHT);
1166                 ath9k_hw_btcoex_enable(ah);
1167
1168                 if (common->bus_ops->bt_coex_prep)
1169                         common->bus_ops->bt_coex_prep(common);
1170                 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
1171                         ath9k_btcoex_timer_resume(sc);
1172         }
1173
1174         /* User has the option to provide pm-qos value as a module
1175          * parameter rather than using the default value of
1176          * 'ATH9K_PM_QOS_DEFAULT_VALUE'.
1177          */
1178         pm_qos_update_request(&sc->pm_qos_req, ath9k_pm_qos_value);
1179
1180         if (ah->caps.pcie_lcr_extsync_en && common->bus_ops->extn_synch_en)
1181                 common->bus_ops->extn_synch_en(common);
1182
1183 mutex_unlock:
1184         mutex_unlock(&sc->mutex);
1185
1186         return r;
1187 }
1188
1189 static int ath9k_tx(struct ieee80211_hw *hw,
1190                     struct sk_buff *skb)
1191 {
1192         struct ath_wiphy *aphy = hw->priv;
1193         struct ath_softc *sc = aphy->sc;
1194         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1195         struct ath_tx_control txctl;
1196         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1197
1198         if (aphy->state != ATH_WIPHY_ACTIVE && aphy->state != ATH_WIPHY_SCAN) {
1199                 ath_dbg(common, ATH_DBG_XMIT,
1200                         "ath9k: %s: TX in unexpected wiphy state %d\n",
1201                         wiphy_name(hw->wiphy), aphy->state);
1202                 goto exit;
1203         }
1204
1205         if (sc->ps_enabled) {
1206                 /*
1207                  * mac80211 does not set PM field for normal data frames, so we
1208                  * need to update that based on the current PS mode.
1209                  */
1210                 if (ieee80211_is_data(hdr->frame_control) &&
1211                     !ieee80211_is_nullfunc(hdr->frame_control) &&
1212                     !ieee80211_has_pm(hdr->frame_control)) {
1213                         ath_dbg(common, ATH_DBG_PS,
1214                                 "Add PM=1 for a TX frame while in PS mode\n");
1215                         hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1216                 }
1217         }
1218
1219         if (unlikely(sc->sc_ah->power_mode != ATH9K_PM_AWAKE)) {
1220                 /*
1221                  * We are using PS-Poll and mac80211 can request TX while in
1222                  * power save mode. Need to wake up hardware for the TX to be
1223                  * completed and if needed, also for RX of buffered frames.
1224                  */
1225                 ath9k_ps_wakeup(sc);
1226                 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
1227                         ath9k_hw_setrxabort(sc->sc_ah, 0);
1228                 if (ieee80211_is_pspoll(hdr->frame_control)) {
1229                         ath_dbg(common, ATH_DBG_PS,
1230                                 "Sending PS-Poll to pick a buffered frame\n");
1231                         sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA;
1232                 } else {
1233                         ath_dbg(common, ATH_DBG_PS,
1234                                 "Wake up to complete TX\n");
1235                         sc->ps_flags |= PS_WAIT_FOR_TX_ACK;
1236                 }
1237                 /*
1238                  * The actual restore operation will happen only after
1239                  * the sc_flags bit is cleared. We are just dropping
1240                  * the ps_usecount here.
1241                  */
1242                 ath9k_ps_restore(sc);
1243         }
1244
1245         memset(&txctl, 0, sizeof(struct ath_tx_control));
1246         txctl.txq = sc->tx.txq_map[skb_get_queue_mapping(skb)];
1247
1248         ath_dbg(common, ATH_DBG_XMIT, "transmitting packet, skb: %p\n", skb);
1249
1250         if (ath_tx_start(hw, skb, &txctl) != 0) {
1251                 ath_dbg(common, ATH_DBG_XMIT, "TX failed\n");
1252                 goto exit;
1253         }
1254
1255         return 0;
1256 exit:
1257         dev_kfree_skb_any(skb);
1258         return 0;
1259 }
1260
1261 static void ath9k_stop(struct ieee80211_hw *hw)
1262 {
1263         struct ath_wiphy *aphy = hw->priv;
1264         struct ath_softc *sc = aphy->sc;
1265         struct ath_hw *ah = sc->sc_ah;
1266         struct ath_common *common = ath9k_hw_common(ah);
1267         int i;
1268
1269         mutex_lock(&sc->mutex);
1270
1271         aphy->state = ATH_WIPHY_INACTIVE;
1272
1273         if (led_blink)
1274                 cancel_delayed_work_sync(&sc->ath_led_blink_work);
1275
1276         cancel_delayed_work_sync(&sc->tx_complete_work);
1277         cancel_work_sync(&sc->paprd_work);
1278         cancel_work_sync(&sc->hw_check_work);
1279
1280         for (i = 0; i < sc->num_sec_wiphy; i++) {
1281                 if (sc->sec_wiphy[i])
1282                         break;
1283         }
1284
1285         if (i == sc->num_sec_wiphy) {
1286                 cancel_delayed_work_sync(&sc->wiphy_work);
1287                 cancel_work_sync(&sc->chan_work);
1288         }
1289
1290         if (sc->sc_flags & SC_OP_INVALID) {
1291                 ath_dbg(common, ATH_DBG_ANY, "Device not present\n");
1292                 mutex_unlock(&sc->mutex);
1293                 return;
1294         }
1295
1296         if (ath9k_wiphy_started(sc)) {
1297                 mutex_unlock(&sc->mutex);
1298                 return; /* another wiphy still in use */
1299         }
1300
1301         /* Ensure HW is awake when we try to shut it down. */
1302         ath9k_ps_wakeup(sc);
1303
1304         if (ah->btcoex_hw.enabled) {
1305                 ath9k_hw_btcoex_disable(ah);
1306                 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
1307                         ath9k_btcoex_timer_pause(sc);
1308         }
1309
1310         spin_lock_bh(&sc->sc_pcu_lock);
1311
1312         /* make sure h/w will not generate any interrupt
1313          * before setting the invalid flag. */
1314         ath9k_hw_disable_interrupts(ah);
1315
1316         if (!(sc->sc_flags & SC_OP_INVALID)) {
1317                 ath_drain_all_txq(sc, false);
1318                 ath_stoprecv(sc);
1319                 ath9k_hw_phy_disable(ah);
1320         } else
1321                 sc->rx.rxlink = NULL;
1322
1323         /* disable HAL and put h/w to sleep */
1324         ath9k_hw_disable(ah);
1325         ath9k_hw_configpcipowersave(ah, 1, 1);
1326
1327         spin_unlock_bh(&sc->sc_pcu_lock);
1328
1329         ath9k_ps_restore(sc);
1330
1331         sc->ps_idle = true;
1332         ath9k_set_wiphy_idle(aphy, true);
1333         ath_radio_disable(sc, hw);
1334
1335         sc->sc_flags |= SC_OP_INVALID;
1336
1337         pm_qos_update_request(&sc->pm_qos_req, PM_QOS_DEFAULT_VALUE);
1338
1339         mutex_unlock(&sc->mutex);
1340
1341         ath_dbg(common, ATH_DBG_CONFIG, "Driver halt\n");
1342 }
1343
1344 static int ath9k_add_interface(struct ieee80211_hw *hw,
1345                                struct ieee80211_vif *vif)
1346 {
1347         struct ath_wiphy *aphy = hw->priv;
1348         struct ath_softc *sc = aphy->sc;
1349         struct ath_hw *ah = sc->sc_ah;
1350         struct ath_common *common = ath9k_hw_common(ah);
1351         struct ath_vif *avp = (void *)vif->drv_priv;
1352         enum nl80211_iftype ic_opmode = NL80211_IFTYPE_UNSPECIFIED;
1353         int ret = 0;
1354
1355         mutex_lock(&sc->mutex);
1356
1357         switch (vif->type) {
1358         case NL80211_IFTYPE_STATION:
1359                 ic_opmode = NL80211_IFTYPE_STATION;
1360                 break;
1361         case NL80211_IFTYPE_WDS:
1362                 ic_opmode = NL80211_IFTYPE_WDS;
1363                 break;
1364         case NL80211_IFTYPE_ADHOC:
1365         case NL80211_IFTYPE_AP:
1366         case NL80211_IFTYPE_MESH_POINT:
1367                 if (sc->nbcnvifs >= ATH_BCBUF) {
1368                         ret = -ENOBUFS;
1369                         goto out;
1370                 }
1371                 ic_opmode = vif->type;
1372                 break;
1373         default:
1374                 ath_err(common, "Interface type %d not yet supported\n",
1375                         vif->type);
1376                 ret = -EOPNOTSUPP;
1377                 goto out;
1378         }
1379
1380         ath_dbg(common, ATH_DBG_CONFIG,
1381                 "Attach a VIF of type: %d\n", ic_opmode);
1382
1383         /* Set the VIF opmode */
1384         avp->av_opmode = ic_opmode;
1385         avp->av_bslot = -1;
1386
1387         sc->nvifs++;
1388
1389         ath9k_set_bssid_mask(hw, vif);
1390
1391         if (sc->nvifs > 1)
1392                 goto out; /* skip global settings for secondary vif */
1393
1394         if (ic_opmode == NL80211_IFTYPE_AP) {
1395                 ath9k_hw_set_tsfadjust(ah, 1);
1396                 sc->sc_flags |= SC_OP_TSF_RESET;
1397         }
1398
1399         /* Set the device opmode */
1400         ah->opmode = ic_opmode;
1401
1402         /*
1403          * Enable MIB interrupts when there are hardware phy counters.
1404          * Note we only do this (at the moment) for station mode.
1405          */
1406         if ((vif->type == NL80211_IFTYPE_STATION) ||
1407             (vif->type == NL80211_IFTYPE_ADHOC) ||
1408             (vif->type == NL80211_IFTYPE_MESH_POINT)) {
1409                 if (ah->config.enable_ani)
1410                         ah->imask |= ATH9K_INT_MIB;
1411                 ah->imask |= ATH9K_INT_TSFOOR;
1412         }
1413
1414         ath9k_hw_set_interrupts(ah, ah->imask);
1415
1416         if (vif->type == NL80211_IFTYPE_AP    ||
1417             vif->type == NL80211_IFTYPE_ADHOC) {
1418                 sc->sc_flags |= SC_OP_ANI_RUN;
1419                 ath_start_ani(common);
1420         }
1421
1422 out:
1423         mutex_unlock(&sc->mutex);
1424         return ret;
1425 }
1426
1427 static void ath9k_reclaim_beacon(struct ath_softc *sc,
1428                                  struct ieee80211_vif *vif)
1429 {
1430         struct ath_vif *avp = (void *)vif->drv_priv;
1431
1432         /* Disable SWBA interrupt */
1433         sc->sc_ah->imask &= ~ATH9K_INT_SWBA;
1434         ath9k_ps_wakeup(sc);
1435         ath9k_hw_set_interrupts(sc->sc_ah, sc->sc_ah->imask);
1436         ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
1437         tasklet_kill(&sc->bcon_tasklet);
1438         ath9k_ps_restore(sc);
1439
1440         ath_beacon_return(sc, avp);
1441         sc->sc_flags &= ~SC_OP_BEACONS;
1442
1443         if (sc->nbcnvifs > 0) {
1444                 /* Re-enable beaconing */
1445                 sc->sc_ah->imask |= ATH9K_INT_SWBA;
1446                 ath9k_ps_wakeup(sc);
1447                 ath9k_hw_set_interrupts(sc->sc_ah, sc->sc_ah->imask);
1448                 ath9k_ps_restore(sc);
1449         }
1450 }
1451
1452 static int ath9k_change_interface(struct ieee80211_hw *hw,
1453                                   struct ieee80211_vif *vif,
1454                                   enum nl80211_iftype new_type,
1455                                   bool p2p)
1456 {
1457         struct ath_wiphy *aphy = hw->priv;
1458         struct ath_softc *sc = aphy->sc;
1459         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1460         int ret = 0;
1461
1462         ath_dbg(common, ATH_DBG_CONFIG, "Change Interface\n");
1463         mutex_lock(&sc->mutex);
1464
1465         switch (new_type) {
1466         case NL80211_IFTYPE_AP:
1467         case NL80211_IFTYPE_ADHOC:
1468                 if (sc->nbcnvifs >= ATH_BCBUF) {
1469                         ath_err(common, "No beacon slot available\n");
1470                         ret = -ENOBUFS;
1471                         goto out;
1472                 }
1473                 break;
1474         case NL80211_IFTYPE_STATION:
1475                 /* Stop ANI */
1476                 sc->sc_flags &= ~SC_OP_ANI_RUN;
1477                 del_timer_sync(&common->ani.timer);
1478                 if ((vif->type == NL80211_IFTYPE_AP) ||
1479                     (vif->type == NL80211_IFTYPE_ADHOC))
1480                         ath9k_reclaim_beacon(sc, vif);
1481                 break;
1482         default:
1483                 ath_err(common, "Interface type %d not yet supported\n",
1484                                 vif->type);
1485                 ret = -ENOTSUPP;
1486                 goto out;
1487         }
1488         vif->type = new_type;
1489         vif->p2p = p2p;
1490
1491 out:
1492         mutex_unlock(&sc->mutex);
1493         return ret;
1494 }
1495
1496 static void ath9k_remove_interface(struct ieee80211_hw *hw,
1497                                    struct ieee80211_vif *vif)
1498 {
1499         struct ath_wiphy *aphy = hw->priv;
1500         struct ath_softc *sc = aphy->sc;
1501         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1502
1503         ath_dbg(common, ATH_DBG_CONFIG, "Detach Interface\n");
1504
1505         mutex_lock(&sc->mutex);
1506
1507         /* Stop ANI */
1508         sc->sc_flags &= ~SC_OP_ANI_RUN;
1509         del_timer_sync(&common->ani.timer);
1510
1511         /* Reclaim beacon resources */
1512         if ((sc->sc_ah->opmode == NL80211_IFTYPE_AP) ||
1513             (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC) ||
1514             (sc->sc_ah->opmode == NL80211_IFTYPE_MESH_POINT))
1515                 ath9k_reclaim_beacon(sc, vif);
1516
1517         sc->nvifs--;
1518
1519         mutex_unlock(&sc->mutex);
1520 }
1521
1522 static void ath9k_enable_ps(struct ath_softc *sc)
1523 {
1524         struct ath_hw *ah = sc->sc_ah;
1525
1526         sc->ps_enabled = true;
1527         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1528                 if ((ah->imask & ATH9K_INT_TIM_TIMER) == 0) {
1529                         ah->imask |= ATH9K_INT_TIM_TIMER;
1530                         ath9k_hw_set_interrupts(ah, ah->imask);
1531                 }
1532                 ath9k_hw_setrxabort(ah, 1);
1533         }
1534 }
1535
1536 static void ath9k_disable_ps(struct ath_softc *sc)
1537 {
1538         struct ath_hw *ah = sc->sc_ah;
1539
1540         sc->ps_enabled = false;
1541         ath9k_hw_setpower(ah, ATH9K_PM_AWAKE);
1542         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1543                 ath9k_hw_setrxabort(ah, 0);
1544                 sc->ps_flags &= ~(PS_WAIT_FOR_BEACON |
1545                                   PS_WAIT_FOR_CAB |
1546                                   PS_WAIT_FOR_PSPOLL_DATA |
1547                                   PS_WAIT_FOR_TX_ACK);
1548                 if (ah->imask & ATH9K_INT_TIM_TIMER) {
1549                         ah->imask &= ~ATH9K_INT_TIM_TIMER;
1550                         ath9k_hw_set_interrupts(ah, ah->imask);
1551                 }
1552         }
1553
1554 }
1555
1556 static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
1557 {
1558         struct ath_wiphy *aphy = hw->priv;
1559         struct ath_softc *sc = aphy->sc;
1560         struct ath_hw *ah = sc->sc_ah;
1561         struct ath_common *common = ath9k_hw_common(ah);
1562         struct ieee80211_conf *conf = &hw->conf;
1563         bool disable_radio;
1564
1565         mutex_lock(&sc->mutex);
1566
1567         /*
1568          * Leave this as the first check because we need to turn on the
1569          * radio if it was disabled before prior to processing the rest
1570          * of the changes. Likewise we must only disable the radio towards
1571          * the end.
1572          */
1573         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
1574                 bool enable_radio;
1575                 bool all_wiphys_idle;
1576                 bool idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1577
1578                 spin_lock_bh(&sc->wiphy_lock);
1579                 all_wiphys_idle =  ath9k_all_wiphys_idle(sc);
1580                 ath9k_set_wiphy_idle(aphy, idle);
1581
1582                 enable_radio = (!idle && all_wiphys_idle);
1583
1584                 /*
1585                  * After we unlock here its possible another wiphy
1586                  * can be re-renabled so to account for that we will
1587                  * only disable the radio toward the end of this routine
1588                  * if by then all wiphys are still idle.
1589                  */
1590                 spin_unlock_bh(&sc->wiphy_lock);
1591
1592                 if (enable_radio) {
1593                         sc->ps_idle = false;
1594                         ath_radio_enable(sc, hw);
1595                         ath_dbg(common, ATH_DBG_CONFIG,
1596                                 "not-idle: enabling radio\n");
1597                 }
1598         }
1599
1600         /*
1601          * We just prepare to enable PS. We have to wait until our AP has
1602          * ACK'd our null data frame to disable RX otherwise we'll ignore
1603          * those ACKs and end up retransmitting the same null data frames.
1604          * IEEE80211_CONF_CHANGE_PS is only passed by mac80211 for STA mode.
1605          */
1606         if (changed & IEEE80211_CONF_CHANGE_PS) {
1607                 unsigned long flags;
1608                 spin_lock_irqsave(&sc->sc_pm_lock, flags);
1609                 if (conf->flags & IEEE80211_CONF_PS)
1610                         ath9k_enable_ps(sc);
1611                 else
1612                         ath9k_disable_ps(sc);
1613                 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1614         }
1615
1616         if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
1617                 if (conf->flags & IEEE80211_CONF_MONITOR) {
1618                         ath_dbg(common, ATH_DBG_CONFIG,
1619                                 "Monitor mode is enabled\n");
1620                         sc->sc_ah->is_monitoring = true;
1621                 } else {
1622                         ath_dbg(common, ATH_DBG_CONFIG,
1623                                 "Monitor mode is disabled\n");
1624                         sc->sc_ah->is_monitoring = false;
1625                 }
1626         }
1627
1628         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1629                 struct ieee80211_channel *curchan = hw->conf.channel;
1630                 int pos = curchan->hw_value;
1631                 int old_pos = -1;
1632                 unsigned long flags;
1633
1634                 if (ah->curchan)
1635                         old_pos = ah->curchan - &ah->channels[0];
1636
1637                 aphy->chan_idx = pos;
1638                 aphy->chan_is_ht = conf_is_ht(conf);
1639                 if (hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)
1640                         sc->sc_flags |= SC_OP_OFFCHANNEL;
1641                 else
1642                         sc->sc_flags &= ~SC_OP_OFFCHANNEL;
1643
1644                 if (aphy->state == ATH_WIPHY_SCAN ||
1645                     aphy->state == ATH_WIPHY_ACTIVE)
1646                         ath9k_wiphy_pause_all_forced(sc, aphy);
1647                 else {
1648                         /*
1649                          * Do not change operational channel based on a paused
1650                          * wiphy changes.
1651                          */
1652                         goto skip_chan_change;
1653                 }
1654
1655                 ath_dbg(common, ATH_DBG_CONFIG, "Set channel: %d MHz\n",
1656                         curchan->center_freq);
1657
1658                 /* XXX: remove me eventualy */
1659                 ath9k_update_ichannel(sc, hw, &sc->sc_ah->channels[pos]);
1660
1661                 /* update survey stats for the old channel before switching */
1662                 spin_lock_irqsave(&common->cc_lock, flags);
1663                 ath_update_survey_stats(sc);
1664                 spin_unlock_irqrestore(&common->cc_lock, flags);
1665
1666                 /*
1667                  * If the operating channel changes, change the survey in-use flags
1668                  * along with it.
1669                  * Reset the survey data for the new channel, unless we're switching
1670                  * back to the operating channel from an off-channel operation.
1671                  */
1672                 if (!(hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) &&
1673                     sc->cur_survey != &sc->survey[pos]) {
1674
1675                         if (sc->cur_survey)
1676                                 sc->cur_survey->filled &= ~SURVEY_INFO_IN_USE;
1677
1678                         sc->cur_survey = &sc->survey[pos];
1679
1680                         memset(sc->cur_survey, 0, sizeof(struct survey_info));
1681                         sc->cur_survey->filled |= SURVEY_INFO_IN_USE;
1682                 } else if (!(sc->survey[pos].filled & SURVEY_INFO_IN_USE)) {
1683                         memset(&sc->survey[pos], 0, sizeof(struct survey_info));
1684                 }
1685
1686                 if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) {
1687                         ath_err(common, "Unable to set channel\n");
1688                         mutex_unlock(&sc->mutex);
1689                         return -EINVAL;
1690                 }
1691
1692                 /*
1693                  * The most recent snapshot of channel->noisefloor for the old
1694                  * channel is only available after the hardware reset. Copy it to
1695                  * the survey stats now.
1696                  */
1697                 if (old_pos >= 0)
1698                         ath_update_survey_nf(sc, old_pos);
1699         }
1700
1701 skip_chan_change:
1702         if (changed & IEEE80211_CONF_CHANGE_POWER) {
1703                 sc->config.txpowlimit = 2 * conf->power_level;
1704                 ath_update_txpow(sc);
1705         }
1706
1707         spin_lock_bh(&sc->wiphy_lock);
1708         disable_radio = ath9k_all_wiphys_idle(sc);
1709         spin_unlock_bh(&sc->wiphy_lock);
1710
1711         if (disable_radio) {
1712                 ath_dbg(common, ATH_DBG_CONFIG, "idle: disabling radio\n");
1713                 sc->ps_idle = true;
1714                 ath_radio_disable(sc, hw);
1715         }
1716
1717         mutex_unlock(&sc->mutex);
1718
1719         return 0;
1720 }
1721
1722 #define SUPPORTED_FILTERS                       \
1723         (FIF_PROMISC_IN_BSS |                   \
1724         FIF_ALLMULTI |                          \
1725         FIF_CONTROL |                           \
1726         FIF_PSPOLL |                            \
1727         FIF_OTHER_BSS |                         \
1728         FIF_BCN_PRBRESP_PROMISC |               \
1729         FIF_PROBE_REQ |                         \
1730         FIF_FCSFAIL)
1731
1732 /* FIXME: sc->sc_full_reset ? */
1733 static void ath9k_configure_filter(struct ieee80211_hw *hw,
1734                                    unsigned int changed_flags,
1735                                    unsigned int *total_flags,
1736                                    u64 multicast)
1737 {
1738         struct ath_wiphy *aphy = hw->priv;
1739         struct ath_softc *sc = aphy->sc;
1740         u32 rfilt;
1741
1742         changed_flags &= SUPPORTED_FILTERS;
1743         *total_flags &= SUPPORTED_FILTERS;
1744
1745         sc->rx.rxfilter = *total_flags;
1746         ath9k_ps_wakeup(sc);
1747         rfilt = ath_calcrxfilter(sc);
1748         ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1749         ath9k_ps_restore(sc);
1750
1751         ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_CONFIG,
1752                 "Set HW RX filter: 0x%x\n", rfilt);
1753 }
1754
1755 static int ath9k_sta_add(struct ieee80211_hw *hw,
1756                          struct ieee80211_vif *vif,
1757                          struct ieee80211_sta *sta)
1758 {
1759         struct ath_wiphy *aphy = hw->priv;
1760         struct ath_softc *sc = aphy->sc;
1761
1762         ath_node_attach(sc, sta);
1763
1764         return 0;
1765 }
1766
1767 static int ath9k_sta_remove(struct ieee80211_hw *hw,
1768                             struct ieee80211_vif *vif,
1769                             struct ieee80211_sta *sta)
1770 {
1771         struct ath_wiphy *aphy = hw->priv;
1772         struct ath_softc *sc = aphy->sc;
1773
1774         ath_node_detach(sc, sta);
1775
1776         return 0;
1777 }
1778
1779 static int ath9k_conf_tx(struct ieee80211_hw *hw, u16 queue,
1780                          const struct ieee80211_tx_queue_params *params)
1781 {
1782         struct ath_wiphy *aphy = hw->priv;
1783         struct ath_softc *sc = aphy->sc;
1784         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1785         struct ath_txq *txq;
1786         struct ath9k_tx_queue_info qi;
1787         int ret = 0;
1788
1789         if (queue >= WME_NUM_AC)
1790                 return 0;
1791
1792         txq = sc->tx.txq_map[queue];
1793
1794         mutex_lock(&sc->mutex);
1795
1796         memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
1797
1798         qi.tqi_aifs = params->aifs;
1799         qi.tqi_cwmin = params->cw_min;
1800         qi.tqi_cwmax = params->cw_max;
1801         qi.tqi_burstTime = params->txop;
1802
1803         ath_dbg(common, ATH_DBG_CONFIG,
1804                 "Configure tx [queue/halq] [%d/%d], aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
1805                 queue, txq->axq_qnum, params->aifs, params->cw_min,
1806                 params->cw_max, params->txop);
1807
1808         ret = ath_txq_update(sc, txq->axq_qnum, &qi);
1809         if (ret)
1810                 ath_err(common, "TXQ Update failed\n");
1811
1812         if (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC)
1813                 if (queue == WME_AC_BE && !ret)
1814                         ath_beaconq_config(sc);
1815
1816         mutex_unlock(&sc->mutex);
1817
1818         return ret;
1819 }
1820
1821 static int ath9k_set_key(struct ieee80211_hw *hw,
1822                          enum set_key_cmd cmd,
1823                          struct ieee80211_vif *vif,
1824                          struct ieee80211_sta *sta,
1825                          struct ieee80211_key_conf *key)
1826 {
1827         struct ath_wiphy *aphy = hw->priv;
1828         struct ath_softc *sc = aphy->sc;
1829         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1830         int ret = 0;
1831
1832         if (ath9k_modparam_nohwcrypt)
1833                 return -ENOSPC;
1834
1835         mutex_lock(&sc->mutex);
1836         ath9k_ps_wakeup(sc);
1837         ath_dbg(common, ATH_DBG_CONFIG, "Set HW Key\n");
1838
1839         switch (cmd) {
1840         case SET_KEY:
1841                 ret = ath_key_config(common, vif, sta, key);
1842                 if (ret >= 0) {
1843                         key->hw_key_idx = ret;
1844                         /* push IV and Michael MIC generation to stack */
1845                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1846                         if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
1847                                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1848                         if (sc->sc_ah->sw_mgmt_crypto &&
1849                             key->cipher == WLAN_CIPHER_SUITE_CCMP)
1850                                 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT;
1851                         ret = 0;
1852                 }
1853                 break;
1854         case DISABLE_KEY:
1855                 ath_key_delete(common, key);
1856                 break;
1857         default:
1858                 ret = -EINVAL;
1859         }
1860
1861         ath9k_ps_restore(sc);
1862         mutex_unlock(&sc->mutex);
1863
1864         return ret;
1865 }
1866
1867 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
1868                                    struct ieee80211_vif *vif,
1869                                    struct ieee80211_bss_conf *bss_conf,
1870                                    u32 changed)
1871 {
1872         struct ath_wiphy *aphy = hw->priv;
1873         struct ath_softc *sc = aphy->sc;
1874         struct ath_hw *ah = sc->sc_ah;
1875         struct ath_common *common = ath9k_hw_common(ah);
1876         struct ath_vif *avp = (void *)vif->drv_priv;
1877         int slottime;
1878         int error;
1879
1880         mutex_lock(&sc->mutex);
1881
1882         if (changed & BSS_CHANGED_BSSID) {
1883                 /* Set BSSID */
1884                 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1885                 memcpy(avp->bssid, bss_conf->bssid, ETH_ALEN);
1886                 common->curaid = 0;
1887                 ath9k_hw_write_associd(ah);
1888
1889                 /* Set aggregation protection mode parameters */
1890                 sc->config.ath_aggr_prot = 0;
1891
1892                 ath_dbg(common, ATH_DBG_CONFIG, "BSSID: %pM aid: 0x%x\n",
1893                         common->curbssid, common->curaid);
1894
1895                 /* need to reconfigure the beacon */
1896                 sc->sc_flags &= ~SC_OP_BEACONS ;
1897         }
1898
1899         /* Enable transmission of beacons (AP, IBSS, MESH) */
1900         if ((changed & BSS_CHANGED_BEACON) ||
1901             ((changed & BSS_CHANGED_BEACON_ENABLED) && bss_conf->enable_beacon)) {
1902                 ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
1903                 error = ath_beacon_alloc(aphy, vif);
1904                 if (!error)
1905                         ath_beacon_config(sc, vif);
1906         }
1907
1908         if (changed & BSS_CHANGED_ERP_SLOT) {
1909                 if (bss_conf->use_short_slot)
1910                         slottime = 9;
1911                 else
1912                         slottime = 20;
1913                 if (vif->type == NL80211_IFTYPE_AP) {
1914                         /*
1915                          * Defer update, so that connected stations can adjust
1916                          * their settings at the same time.
1917                          * See beacon.c for more details
1918                          */
1919                         sc->beacon.slottime = slottime;
1920                         sc->beacon.updateslot = UPDATE;
1921                 } else {
1922                         ah->slottime = slottime;
1923                         ath9k_hw_init_global_settings(ah);
1924                 }
1925         }
1926
1927         /* Disable transmission of beacons */
1928         if ((changed & BSS_CHANGED_BEACON_ENABLED) && !bss_conf->enable_beacon)
1929                 ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
1930
1931         if (changed & BSS_CHANGED_BEACON_INT) {
1932                 sc->beacon_interval = bss_conf->beacon_int;
1933                 /*
1934                  * In case of AP mode, the HW TSF has to be reset
1935                  * when the beacon interval changes.
1936                  */
1937                 if (vif->type == NL80211_IFTYPE_AP) {
1938                         sc->sc_flags |= SC_OP_TSF_RESET;
1939                         ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
1940                         error = ath_beacon_alloc(aphy, vif);
1941                         if (!error)
1942                                 ath_beacon_config(sc, vif);
1943                 } else {
1944                         ath_beacon_config(sc, vif);
1945                 }
1946         }
1947
1948         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1949                 ath_dbg(common, ATH_DBG_CONFIG, "BSS Changed PREAMBLE %d\n",
1950                         bss_conf->use_short_preamble);
1951                 if (bss_conf->use_short_preamble)
1952                         sc->sc_flags |= SC_OP_PREAMBLE_SHORT;
1953                 else
1954                         sc->sc_flags &= ~SC_OP_PREAMBLE_SHORT;
1955         }
1956
1957         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1958                 ath_dbg(common, ATH_DBG_CONFIG, "BSS Changed CTS PROT %d\n",
1959                         bss_conf->use_cts_prot);
1960                 if (bss_conf->use_cts_prot &&
1961                     hw->conf.channel->band != IEEE80211_BAND_5GHZ)
1962                         sc->sc_flags |= SC_OP_PROTECT_ENABLE;
1963                 else
1964                         sc->sc_flags &= ~SC_OP_PROTECT_ENABLE;
1965         }
1966
1967         if (changed & BSS_CHANGED_ASSOC) {
1968                 ath_dbg(common, ATH_DBG_CONFIG, "BSS Changed ASSOC %d\n",
1969                         bss_conf->assoc);
1970                 ath9k_bss_assoc_info(sc, hw, vif, bss_conf);
1971         }
1972
1973         mutex_unlock(&sc->mutex);
1974 }
1975
1976 static u64 ath9k_get_tsf(struct ieee80211_hw *hw)
1977 {
1978         u64 tsf;
1979         struct ath_wiphy *aphy = hw->priv;
1980         struct ath_softc *sc = aphy->sc;
1981
1982         mutex_lock(&sc->mutex);
1983         ath9k_ps_wakeup(sc);
1984         tsf = ath9k_hw_gettsf64(sc->sc_ah);
1985         ath9k_ps_restore(sc);
1986         mutex_unlock(&sc->mutex);
1987
1988         return tsf;
1989 }
1990
1991 static void ath9k_set_tsf(struct ieee80211_hw *hw, u64 tsf)
1992 {
1993         struct ath_wiphy *aphy = hw->priv;
1994         struct ath_softc *sc = aphy->sc;
1995
1996         mutex_lock(&sc->mutex);
1997         ath9k_ps_wakeup(sc);
1998         ath9k_hw_settsf64(sc->sc_ah, tsf);
1999         ath9k_ps_restore(sc);
2000         mutex_unlock(&sc->mutex);
2001 }
2002
2003 static void ath9k_reset_tsf(struct ieee80211_hw *hw)
2004 {
2005         struct ath_wiphy *aphy = hw->priv;
2006         struct ath_softc *sc = aphy->sc;
2007
2008         mutex_lock(&sc->mutex);
2009
2010         ath9k_ps_wakeup(sc);
2011         ath9k_hw_reset_tsf(sc->sc_ah);
2012         ath9k_ps_restore(sc);
2013
2014         mutex_unlock(&sc->mutex);
2015 }
2016
2017 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
2018                               struct ieee80211_vif *vif,
2019                               enum ieee80211_ampdu_mlme_action action,
2020                               struct ieee80211_sta *sta,
2021                               u16 tid, u16 *ssn)
2022 {
2023         struct ath_wiphy *aphy = hw->priv;
2024         struct ath_softc *sc = aphy->sc;
2025         int ret = 0;
2026
2027         local_bh_disable();
2028
2029         switch (action) {
2030         case IEEE80211_AMPDU_RX_START:
2031                 if (!(sc->sc_flags & SC_OP_RXAGGR))
2032                         ret = -ENOTSUPP;
2033                 break;
2034         case IEEE80211_AMPDU_RX_STOP:
2035                 break;
2036         case IEEE80211_AMPDU_TX_START:
2037                 if (!(sc->sc_flags & SC_OP_TXAGGR))
2038                         return -EOPNOTSUPP;
2039
2040                 ath9k_ps_wakeup(sc);
2041                 ret = ath_tx_aggr_start(sc, sta, tid, ssn);
2042                 if (!ret)
2043                         ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2044                 ath9k_ps_restore(sc);
2045                 break;
2046         case IEEE80211_AMPDU_TX_STOP:
2047                 ath9k_ps_wakeup(sc);
2048                 ath_tx_aggr_stop(sc, sta, tid);
2049                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2050                 ath9k_ps_restore(sc);
2051                 break;
2052         case IEEE80211_AMPDU_TX_OPERATIONAL:
2053                 ath9k_ps_wakeup(sc);
2054                 ath_tx_aggr_resume(sc, sta, tid);
2055                 ath9k_ps_restore(sc);
2056                 break;
2057         default:
2058                 ath_err(ath9k_hw_common(sc->sc_ah), "Unknown AMPDU action\n");
2059         }
2060
2061         local_bh_enable();
2062
2063         return ret;
2064 }
2065
2066 static int ath9k_get_survey(struct ieee80211_hw *hw, int idx,
2067                              struct survey_info *survey)
2068 {
2069         struct ath_wiphy *aphy = hw->priv;
2070         struct ath_softc *sc = aphy->sc;
2071         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2072         struct ieee80211_supported_band *sband;
2073         struct ieee80211_channel *chan;
2074         unsigned long flags;
2075         int pos;
2076
2077         spin_lock_irqsave(&common->cc_lock, flags);
2078         if (idx == 0)
2079                 ath_update_survey_stats(sc);
2080
2081         sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ];
2082         if (sband && idx >= sband->n_channels) {
2083                 idx -= sband->n_channels;
2084                 sband = NULL;
2085         }
2086
2087         if (!sband)
2088                 sband = hw->wiphy->bands[IEEE80211_BAND_5GHZ];
2089
2090         if (!sband || idx >= sband->n_channels) {
2091                 spin_unlock_irqrestore(&common->cc_lock, flags);
2092                 return -ENOENT;
2093         }
2094
2095         chan = &sband->channels[idx];
2096         pos = chan->hw_value;
2097         memcpy(survey, &sc->survey[pos], sizeof(*survey));
2098         survey->channel = chan;
2099         spin_unlock_irqrestore(&common->cc_lock, flags);
2100
2101         return 0;
2102 }
2103
2104 static void ath9k_sw_scan_start(struct ieee80211_hw *hw)
2105 {
2106         struct ath_wiphy *aphy = hw->priv;
2107         struct ath_softc *sc = aphy->sc;
2108
2109         mutex_lock(&sc->mutex);
2110         if (ath9k_wiphy_scanning(sc)) {
2111                 /*
2112                  * There is a race here in mac80211 but fixing it requires
2113                  * we revisit how we handle the scan complete callback.
2114                  * After mac80211 fixes we will not have configured hardware
2115                  * to the home channel nor would we have configured the RX
2116                  * filter yet.
2117                  */
2118                 mutex_unlock(&sc->mutex);
2119                 return;
2120         }
2121
2122         aphy->state = ATH_WIPHY_SCAN;
2123         ath9k_wiphy_pause_all_forced(sc, aphy);
2124         mutex_unlock(&sc->mutex);
2125 }
2126
2127 /*
2128  * XXX: this requires a revisit after the driver
2129  * scan_complete gets moved to another place/removed in mac80211.
2130  */
2131 static void ath9k_sw_scan_complete(struct ieee80211_hw *hw)
2132 {
2133         struct ath_wiphy *aphy = hw->priv;
2134         struct ath_softc *sc = aphy->sc;
2135
2136         mutex_lock(&sc->mutex);
2137         aphy->state = ATH_WIPHY_ACTIVE;
2138         mutex_unlock(&sc->mutex);
2139 }
2140
2141 static void ath9k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
2142 {
2143         struct ath_wiphy *aphy = hw->priv;
2144         struct ath_softc *sc = aphy->sc;
2145         struct ath_hw *ah = sc->sc_ah;
2146
2147         mutex_lock(&sc->mutex);
2148         ah->coverage_class = coverage_class;
2149         ath9k_hw_init_global_settings(ah);
2150         mutex_unlock(&sc->mutex);
2151 }
2152
2153 struct ieee80211_ops ath9k_ops = {
2154         .tx                 = ath9k_tx,
2155         .start              = ath9k_start,
2156         .stop               = ath9k_stop,
2157         .add_interface      = ath9k_add_interface,
2158         .change_interface   = ath9k_change_interface,
2159         .remove_interface   = ath9k_remove_interface,
2160         .config             = ath9k_config,
2161         .configure_filter   = ath9k_configure_filter,
2162         .sta_add            = ath9k_sta_add,
2163         .sta_remove         = ath9k_sta_remove,
2164         .conf_tx            = ath9k_conf_tx,
2165         .bss_info_changed   = ath9k_bss_info_changed,
2166         .set_key            = ath9k_set_key,
2167         .get_tsf            = ath9k_get_tsf,
2168         .set_tsf            = ath9k_set_tsf,
2169         .reset_tsf          = ath9k_reset_tsf,
2170         .ampdu_action       = ath9k_ampdu_action,
2171         .get_survey         = ath9k_get_survey,
2172         .sw_scan_start      = ath9k_sw_scan_start,
2173         .sw_scan_complete   = ath9k_sw_scan_complete,
2174         .rfkill_poll        = ath9k_rfkill_poll_state,
2175         .set_coverage_class = ath9k_set_coverage_class,
2176 };