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

   1 /*
   2  * Copyright (c) 2008-2011 Atheros Communications Inc.
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include <linux/nl80211.h>
  18 #include <linux/delay.h>
  19 #include "ath9k.h"
  20 #include "btcoex.h"
  21
  22 static u8 parse_mpdudensity(u8 mpdudensity)
  23 {
  24         /*
  25          * 802.11n D2.0 defined values for "Minimum MPDU Start Spacing":
  26          *   0 for no restriction
  27          *   1 for 1/4 us
  28          *   2 for 1/2 us
  29          *   3 for 1 us
  30          *   4 for 2 us
  31          *   5 for 4 us
  32          *   6 for 8 us
  33          *   7 for 16 us
  34          */
  35         switch (mpdudensity) {
  36         case 0:
  37                 return 0;
  38         case 1:
  39         case 2:
  40         case 3:
  41                 /* Our lower layer calculations limit our precision to
  42                    1 microsecond */
  43                 return 1;
  44         case 4:
  45                 return 2;
  46         case 5:
  47                 return 4;
  48         case 6:
  49                 return 8;
  50         case 7:
  51                 return 16;
  52         default:
  53                 return 0;
  54         }
  55 }
  56
  57 static bool ath9k_has_pending_frames(struct ath_softc *sc, struct ath_txq *txq)
  58 {
  59         bool pending = false;
  60
  61         spin_lock_bh(&txq->axq_lock);
  62
  63         if (txq->axq_depth || !list_empty(&txq->axq_acq))
  64                 pending = true;
  65
  66         spin_unlock_bh(&txq->axq_lock);
  67         return pending;
  68 }
  69
  70 static bool ath9k_setpower(struct ath_softc *sc, enum ath9k_power_mode mode)
  71 {
  72         unsigned long flags;
  73         bool ret;
  74
  75         spin_lock_irqsave(&sc->sc_pm_lock, flags);
  76         ret = ath9k_hw_setpower(sc->sc_ah, mode);
  77         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
  78
  79         return ret;
  80 }
  81
  82 void ath9k_ps_wakeup(struct ath_softc *sc)
  83 {
  84         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
  85         unsigned long flags;
  86         enum ath9k_power_mode power_mode;
  87
  88         spin_lock_irqsave(&sc->sc_pm_lock, flags);
  89         if (++sc->ps_usecount != 1)
  90                 goto unlock;
  91
  92         power_mode = sc->sc_ah->power_mode;
  93         ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
  94
  95         /*
  96          * While the hardware is asleep, the cycle counters contain no
  97          * useful data. Better clear them now so that they don't mess up
  98          * survey data results.
  99          */
 100         if (power_mode != ATH9K_PM_AWAKE) {
 101                 spin_lock(&common->cc_lock);
 102                 ath_hw_cycle_counters_update(common);
 103                 memset(&common->cc_survey, 0, sizeof(common->cc_survey));
 104                 spin_unlock(&common->cc_lock);
 105         }
 106
 107  unlock:
 108         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 109 }
 110
 111 void ath9k_ps_restore(struct ath_softc *sc)
 112 {
 113         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 114         enum ath9k_power_mode mode;
 115         unsigned long flags;
 116
 117         spin_lock_irqsave(&sc->sc_pm_lock, flags);
 118         if (--sc->ps_usecount != 0)
 119                 goto unlock;
 120
 121         if (sc->ps_idle && (sc->ps_flags & PS_WAIT_FOR_TX_ACK))
 122                 mode = ATH9K_PM_FULL_SLEEP;
 123         else if (sc->ps_enabled &&
 124                  !(sc->ps_flags & (PS_WAIT_FOR_BEACON |
 125                               PS_WAIT_FOR_CAB |
 126                               PS_WAIT_FOR_PSPOLL_DATA |
 127                               PS_WAIT_FOR_TX_ACK)))
 128                 mode = ATH9K_PM_NETWORK_SLEEP;
 129         else
 130                 goto unlock;
 131
 132         spin_lock(&common->cc_lock);
 133         ath_hw_cycle_counters_update(common);
 134         spin_unlock(&common->cc_lock);
 135
 136         ath9k_hw_setpower(sc->sc_ah, mode);
 137
 138  unlock:
 139         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 140 }
 141
 142 void ath_start_ani(struct ath_common *common)
 143 {
 144         struct ath_hw *ah = common->ah;
 145         unsigned long timestamp = jiffies_to_msecs(jiffies);
 146         struct ath_softc *sc = (struct ath_softc *) common->priv;
 147
 148         if (!(sc->sc_flags & SC_OP_ANI_RUN))
 149                 return;
 150
 151         if (sc->sc_flags & SC_OP_OFFCHANNEL)
 152                 return;
 153
 154         common->ani.longcal_timer = timestamp;
 155         common->ani.shortcal_timer = timestamp;
 156         common->ani.checkani_timer = timestamp;
 157
 158         mod_timer(&common->ani.timer,
 159                   jiffies +
 160                         msecs_to_jiffies((u32)ah->config.ani_poll_interval));
 161 }
 162
 163 static void ath_update_survey_nf(struct ath_softc *sc, int channel)
 164 {
 165         struct ath_hw *ah = sc->sc_ah;
 166         struct ath9k_channel *chan = &ah->channels[channel];
 167         struct survey_info *survey = &sc->survey[channel];
 168
 169         if (chan->noisefloor) {
 170                 survey->filled |= SURVEY_INFO_NOISE_DBM;
 171                 survey->noise = ath9k_hw_getchan_noise(ah, chan);
 172         }
 173 }
 174
 175 /*
 176  * Updates the survey statistics and returns the busy time since last
 177  * update in %, if the measurement duration was long enough for the
 178  * result to be useful, -1 otherwise.
 179  */
 180 static int ath_update_survey_stats(struct ath_softc *sc)
 181 {
 182         struct ath_hw *ah = sc->sc_ah;
 183         struct ath_common *common = ath9k_hw_common(ah);
 184         int pos = ah->curchan - &ah->channels[0];
 185         struct survey_info *survey = &sc->survey[pos];
 186         struct ath_cycle_counters *cc = &common->cc_survey;
 187         unsigned int div = common->clockrate * 1000;
 188         int ret = 0;
 189
 190         if (!ah->curchan)
 191                 return -1;
 192
 193         if (ah->power_mode == ATH9K_PM_AWAKE)
 194                 ath_hw_cycle_counters_update(common);
 195
 196         if (cc->cycles > 0) {
 197                 survey->filled |= SURVEY_INFO_CHANNEL_TIME |
 198                         SURVEY_INFO_CHANNEL_TIME_BUSY |
 199                         SURVEY_INFO_CHANNEL_TIME_RX |
 200                         SURVEY_INFO_CHANNEL_TIME_TX;
 201                 survey->channel_time += cc->cycles / div;
 202                 survey->channel_time_busy += cc->rx_busy / div;
 203                 survey->channel_time_rx += cc->rx_frame / div;
 204                 survey->channel_time_tx += cc->tx_frame / div;
 205         }
 206
 207         if (cc->cycles < div)
 208                 return -1;
 209
 210         if (cc->cycles > 0)
 211                 ret = cc->rx_busy * 100 / cc->cycles;
 212
 213         memset(cc, 0, sizeof(*cc));
 214
 215         ath_update_survey_nf(sc, pos);
 216
 217         return ret;
 218 }
 219
 220 static void __ath_cancel_work(struct ath_softc *sc)
 221 {
 222         cancel_work_sync(&sc->paprd_work);
 223         cancel_work_sync(&sc->hw_check_work);
 224         cancel_delayed_work_sync(&sc->tx_complete_work);
 225         cancel_delayed_work_sync(&sc->hw_pll_work);
 226 }
 227
 228 static void ath_cancel_work(struct ath_softc *sc)
 229 {
 230         __ath_cancel_work(sc);
 231         cancel_work_sync(&sc->hw_reset_work);
 232 }
 233
 234 static bool ath_prepare_reset(struct ath_softc *sc, bool retry_tx, bool flush)
 235 {
 236         struct ath_hw *ah = sc->sc_ah;
 237         struct ath_common *common = ath9k_hw_common(ah);
 238         bool ret;
 239
 240         ieee80211_stop_queues(sc->hw);
 241
 242         sc->hw_busy_count = 0;
 243         del_timer_sync(&common->ani.timer);
 244         del_timer_sync(&sc->rx_poll_timer);
 245
 246         ath9k_debug_samp_bb_mac(sc);
 247         ath9k_hw_disable_interrupts(ah);
 248
 249         ret = ath_drain_all_txq(sc, retry_tx);
 250
 251         if (!ath_stoprecv(sc))
 252                 ret = false;
 253
 254         if (!flush) {
 255                 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
 256                         ath_rx_tasklet(sc, 1, true);
 257                 ath_rx_tasklet(sc, 1, false);
 258         } else {
 259                 ath_flushrecv(sc);
 260         }
 261
 262         return ret;
 263 }
 264
 265 static bool ath_complete_reset(struct ath_softc *sc, bool start)
 266 {
 267         struct ath_hw *ah = sc->sc_ah;
 268         struct ath_common *common = ath9k_hw_common(ah);
 269
 270         if (ath_startrecv(sc) != 0) {
 271                 ath_err(common, "Unable to restart recv logic\n");
 272                 return false;
 273         }
 274
 275         ath9k_cmn_update_txpow(ah, sc->curtxpow,
 276                                sc->config.txpowlimit, &sc->curtxpow);
 277         ath9k_hw_set_interrupts(ah);
 278         ath9k_hw_enable_interrupts(ah);
 279
 280         if (!(sc->sc_flags & (SC_OP_OFFCHANNEL)) && start) {
 281                 if (sc->sc_flags & SC_OP_BEACONS)
 282                         ath_set_beacon(sc);
 283
 284                 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
 285                 ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/2);
 286                 ath_start_rx_poll(sc, 3);
 287                 if (!common->disable_ani)
 288                         ath_start_ani(common);
 289         }
 290
 291         if ((ah->caps.hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB) && sc->ant_rx != 3) {
 292                 struct ath_hw_antcomb_conf div_ant_conf;
 293                 u8 lna_conf;
 294
 295                 ath9k_hw_antdiv_comb_conf_get(ah, &div_ant_conf);
 296
 297                 if (sc->ant_rx == 1)
 298                         lna_conf = ATH_ANT_DIV_COMB_LNA1;
 299                 else
 300                         lna_conf = ATH_ANT_DIV_COMB_LNA2;
 301                 div_ant_conf.main_lna_conf = lna_conf;
 302                 div_ant_conf.alt_lna_conf = lna_conf;
 303
 304                 ath9k_hw_antdiv_comb_conf_set(ah, &div_ant_conf);
 305         }
 306
 307         ieee80211_wake_queues(sc->hw);
 308
 309         return true;
 310 }
 311
 312 static int ath_reset_internal(struct ath_softc *sc, struct ath9k_channel *hchan,
 313                               bool retry_tx)
 314 {
 315         struct ath_hw *ah = sc->sc_ah;
 316         struct ath_common *common = ath9k_hw_common(ah);
 317         struct ath9k_hw_cal_data *caldata = NULL;
 318         bool fastcc = true;
 319         bool flush = false;
 320         int r;
 321
 322         __ath_cancel_work(sc);
 323
 324         spin_lock_bh(&sc->sc_pcu_lock);
 325
 326         if (!(sc->sc_flags & SC_OP_OFFCHANNEL)) {
 327                 fastcc = false;
 328                 caldata = &sc->caldata;
 329         }
 330
 331         if (!hchan) {
 332                 fastcc = false;
 333                 flush = true;
 334                 hchan = ah->curchan;
 335         }
 336
 337         if (!ath_prepare_reset(sc, retry_tx, flush))
 338                 fastcc = false;
 339
 340         ath_dbg(common, CONFIG, "Reset to %u MHz, HT40: %d fastcc: %d\n",
 341                 hchan->channel, IS_CHAN_HT40(hchan), fastcc);
 342
 343         r = ath9k_hw_reset(ah, hchan, caldata, fastcc);
 344         if (r) {
 345                 ath_err(common,
 346                         "Unable to reset channel, reset status %d\n", r);
 347                 goto out;
 348         }
 349
 350         if (!ath_complete_reset(sc, true))
 351                 r = -EIO;
 352
 353 out:
 354         spin_unlock_bh(&sc->sc_pcu_lock);
 355         return r;
 356 }
 357
 358
 359 /*
 360  * Set/change channels.  If the channel is really being changed, it's done
 361  * by reseting the chip.  To accomplish this we must first cleanup any pending
 362  * DMA, then restart stuff.
 363 */
 364 static int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
 365                     struct ath9k_channel *hchan)
 366 {
 367         int r;
 368
 369         if (sc->sc_flags & SC_OP_INVALID)
 370                 return -EIO;
 371
 372         r = ath_reset_internal(sc, hchan, false);
 373
 374         return r;
 375 }
 376
 377 static void ath_paprd_activate(struct ath_softc *sc)
 378 {
 379         struct ath_hw *ah = sc->sc_ah;
 380         struct ath9k_hw_cal_data *caldata = ah->caldata;
 381         int chain;
 382
 383         if (!caldata || !caldata->paprd_done)
 384                 return;
 385
 386         ath9k_ps_wakeup(sc);
 387         ar9003_paprd_enable(ah, false);
 388         for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
 389                 if (!(ah->txchainmask & BIT(chain)))
 390                         continue;
 391
 392                 ar9003_paprd_populate_single_table(ah, caldata, chain);
 393         }
 394
 395         ar9003_paprd_enable(ah, true);
 396         ath9k_ps_restore(sc);
 397 }
 398
 399 static bool ath_paprd_send_frame(struct ath_softc *sc, struct sk_buff *skb, int chain)
 400 {
 401         struct ieee80211_hw *hw = sc->hw;
 402         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
 403         struct ath_hw *ah = sc->sc_ah;
 404         struct ath_common *common = ath9k_hw_common(ah);
 405         struct ath_tx_control txctl;
 406         int time_left;
 407
 408         memset(&txctl, 0, sizeof(txctl));
 409         txctl.txq = sc->tx.txq_map[WME_AC_BE];
 410
 411         memset(tx_info, 0, sizeof(*tx_info));
 412         tx_info->band = hw->conf.channel->band;
 413         tx_info->flags |= IEEE80211_TX_CTL_NO_ACK;
 414         tx_info->control.rates[0].idx = 0;
 415         tx_info->control.rates[0].count = 1;
 416         tx_info->control.rates[0].flags = IEEE80211_TX_RC_MCS;
 417         tx_info->control.rates[1].idx = -1;
 418
 419         init_completion(&sc->paprd_complete);
 420         txctl.paprd = BIT(chain);
 421
 422         if (ath_tx_start(hw, skb, &txctl) != 0) {
 423                 ath_dbg(common, CALIBRATE, "PAPRD TX failed\n");
 424                 dev_kfree_skb_any(skb);
 425                 return false;
 426         }
 427
 428         time_left = wait_for_completion_timeout(&sc->paprd_complete,
 429                         msecs_to_jiffies(ATH_PAPRD_TIMEOUT));
 430
 431         if (!time_left)
 432                 ath_dbg(common, CALIBRATE,
 433                         "Timeout waiting for paprd training on TX chain %d\n",
 434                         chain);
 435
 436         return !!time_left;
 437 }
 438
 439 void ath_paprd_calibrate(struct work_struct *work)
 440 {
 441         struct ath_softc *sc = container_of(work, struct ath_softc, paprd_work);
 442         struct ieee80211_hw *hw = sc->hw;
 443         struct ath_hw *ah = sc->sc_ah;
 444         struct ieee80211_hdr *hdr;
 445         struct sk_buff *skb = NULL;
 446         struct ath9k_hw_cal_data *caldata = ah->caldata;
 447         struct ath_common *common = ath9k_hw_common(ah);
 448         int ftype;
 449         int chain_ok = 0;
 450         int chain;
 451         int len = 1800;
 452
 453         if (!caldata)
 454                 return;
 455
 456         ath9k_ps_wakeup(sc);
 457
 458         if (ar9003_paprd_init_table(ah) < 0)
 459                 goto fail_paprd;
 460
 461         skb = alloc_skb(len, GFP_KERNEL);
 462         if (!skb)
 463                 goto fail_paprd;
 464
 465         skb_put(skb, len);
 466         memset(skb->data, 0, len);
 467         hdr = (struct ieee80211_hdr *)skb->data;
 468         ftype = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC;
 469         hdr->frame_control = cpu_to_le16(ftype);
 470         hdr->duration_id = cpu_to_le16(10);
 471         memcpy(hdr->addr1, hw->wiphy->perm_addr, ETH_ALEN);
 472         memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN);
 473         memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN);
 474
 475         for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
 476                 if (!(ah->txchainmask & BIT(chain)))
 477                         continue;
 478
 479                 chain_ok = 0;
 480
 481                 ath_dbg(common, CALIBRATE,
 482                         "Sending PAPRD frame for thermal measurement on chain %d\n",
 483                         chain);
 484                 if (!ath_paprd_send_frame(sc, skb, chain))
 485                         goto fail_paprd;
 486
 487                 ar9003_paprd_setup_gain_table(ah, chain);
 488
 489                 ath_dbg(common, CALIBRATE,
 490                         "Sending PAPRD training frame on chain %d\n", chain);
 491                 if (!ath_paprd_send_frame(sc, skb, chain))
 492                         goto fail_paprd;
 493
 494                 if (!ar9003_paprd_is_done(ah)) {
 495                         ath_dbg(common, CALIBRATE,
 496                                 "PAPRD not yet done on chain %d\n", chain);
 497                         break;
 498                 }
 499
 500                 if (ar9003_paprd_create_curve(ah, caldata, chain)) {
 501                         ath_dbg(common, CALIBRATE,
 502                                 "PAPRD create curve failed on chain %d\n",
 503                                                                    chain);
 504                         break;
 505                 }
 506
 507                 chain_ok = 1;
 508         }
 509         kfree_skb(skb);
 510
 511         if (chain_ok) {
 512                 caldata->paprd_done = true;
 513                 ath_paprd_activate(sc);
 514         }
 515
 516 fail_paprd:
 517         ath9k_ps_restore(sc);
 518 }
 519
 520 /*
 521  *  This routine performs the periodic noise floor calibration function
 522  *  that is used to adjust and optimize the chip performance.  This
 523  *  takes environmental changes (location, temperature) into account.
 524  *  When the task is complete, it reschedules itself depending on the
 525  *  appropriate interval that was calculated.
 526  */
 527 void ath_ani_calibrate(unsigned long data)
 528 {
 529         struct ath_softc *sc = (struct ath_softc *)data;
 530         struct ath_hw *ah = sc->sc_ah;
 531         struct ath_common *common = ath9k_hw_common(ah);
 532         bool longcal = false;
 533         bool shortcal = false;
 534         bool aniflag = false;
 535         unsigned int timestamp = jiffies_to_msecs(jiffies);
 536         u32 cal_interval, short_cal_interval, long_cal_interval;
 537         unsigned long flags;
 538
 539         if (ah->caldata && ah->caldata->nfcal_interference)
 540                 long_cal_interval = ATH_LONG_CALINTERVAL_INT;
 541         else
 542                 long_cal_interval = ATH_LONG_CALINTERVAL;
 543
 544         short_cal_interval = (ah->opmode == NL80211_IFTYPE_AP) ?
 545                 ATH_AP_SHORT_CALINTERVAL : ATH_STA_SHORT_CALINTERVAL;
 546
 547         /* Only calibrate if awake */
 548         if (sc->sc_ah->power_mode != ATH9K_PM_AWAKE)
 549                 goto set_timer;
 550
 551         ath9k_ps_wakeup(sc);
 552
 553         /* Long calibration runs independently of short calibration. */
 554         if ((timestamp - common->ani.longcal_timer) >= long_cal_interval) {
 555                 longcal = true;
 556                 common->ani.longcal_timer = timestamp;
 557         }
 558
 559         /* Short calibration applies only while caldone is false */
 560         if (!common->ani.caldone) {
 561                 if ((timestamp - common->ani.shortcal_timer) >= short_cal_interval) {
 562                         shortcal = true;
 563                         common->ani.shortcal_timer = timestamp;
 564                         common->ani.resetcal_timer = timestamp;
 565                 }
 566         } else {
 567                 if ((timestamp - common->ani.resetcal_timer) >=
 568                     ATH_RESTART_CALINTERVAL) {
 569                         common->ani.caldone = ath9k_hw_reset_calvalid(ah);
 570                         if (common->ani.caldone)
 571                                 common->ani.resetcal_timer = timestamp;
 572                 }
 573         }
 574
 575         /* Verify whether we must check ANI */
 576         if (sc->sc_ah->config.enable_ani
 577             && (timestamp - common->ani.checkani_timer) >=
 578             ah->config.ani_poll_interval) {
 579                 aniflag = true;
 580                 common->ani.checkani_timer = timestamp;
 581         }
 582
 583         /* Call ANI routine if necessary */
 584         if (aniflag) {
 585                 spin_lock_irqsave(&common->cc_lock, flags);
 586                 ath9k_hw_ani_monitor(ah, ah->curchan);
 587                 ath_update_survey_stats(sc);
 588                 spin_unlock_irqrestore(&common->cc_lock, flags);
 589         }
 590
 591         /* Perform calibration if necessary */
 592         if (longcal || shortcal) {
 593                 common->ani.caldone =
 594                         ath9k_hw_calibrate(ah, ah->curchan,
 595                                                 ah->rxchainmask, longcal);
 596         }
 597
 598         ath_dbg(common, ANI,
 599                 "Calibration @%lu finished: %s %s %s, caldone: %s\n",
 600                 jiffies,
 601                 longcal ? "long" : "", shortcal ? "short" : "",
 602                 aniflag ? "ani" : "", common->ani.caldone ? "true" : "false");
 603
 604         ath9k_ps_restore(sc);
 605
 606 set_timer:
 607         /*
 608         * Set timer interval based on previous results.
 609         * The interval must be the shortest necessary to satisfy ANI,
 610         * short calibration and long calibration.
 611         */
 612         ath9k_debug_samp_bb_mac(sc);
 613         cal_interval = ATH_LONG_CALINTERVAL;
 614         if (sc->sc_ah->config.enable_ani)
 615                 cal_interval = min(cal_interval,
 616                                    (u32)ah->config.ani_poll_interval);
 617         if (!common->ani.caldone)
 618                 cal_interval = min(cal_interval, (u32)short_cal_interval);
 619
 620         mod_timer(&common->ani.timer, jiffies + msecs_to_jiffies(cal_interval));
 621         if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_PAPRD) && ah->caldata) {
 622                 if (!ah->caldata->paprd_done)
 623                         ieee80211_queue_work(sc->hw, &sc->paprd_work);
 624                 else if (!ah->paprd_table_write_done)
 625                         ath_paprd_activate(sc);
 626         }
 627 }
 628
 629 static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta,
 630                             struct ieee80211_vif *vif)
 631 {
 632         struct ath_node *an;
 633         an = (struct ath_node *)sta->drv_priv;
 634
 635 #ifdef CONFIG_ATH9K_DEBUGFS
 636         spin_lock(&sc->nodes_lock);
 637         list_add(&an->list, &sc->nodes);
 638         spin_unlock(&sc->nodes_lock);
 639 #endif
 640         an->sta = sta;
 641         an->vif = vif;
 642
 643         if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT) {
 644                 ath_tx_node_init(sc, an);
 645                 an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR +
 646                                      sta->ht_cap.ampdu_factor);
 647                 an->mpdudensity = parse_mpdudensity(sta->ht_cap.ampdu_density);
 648         }
 649 }
 650
 651 static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
 652 {
 653         struct ath_node *an = (struct ath_node *)sta->drv_priv;
 654
 655 #ifdef CONFIG_ATH9K_DEBUGFS
 656         spin_lock(&sc->nodes_lock);
 657         list_del(&an->list);
 658         spin_unlock(&sc->nodes_lock);
 659         an->sta = NULL;
 660 #endif
 661
 662         if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT)
 663                 ath_tx_node_cleanup(sc, an);
 664 }
 665
 666
 667 void ath9k_tasklet(unsigned long data)
 668 {
 669         struct ath_softc *sc = (struct ath_softc *)data;
 670         struct ath_hw *ah = sc->sc_ah;
 671         struct ath_common *common = ath9k_hw_common(ah);
 672
 673         u32 status = sc->intrstatus;
 674         u32 rxmask;
 675
 676         ath9k_ps_wakeup(sc);
 677         spin_lock(&sc->sc_pcu_lock);
 678
 679         if ((status & ATH9K_INT_FATAL) ||
 680             (status & ATH9K_INT_BB_WATCHDOG)) {
 681 #ifdef CONFIG_ATH9K_DEBUGFS
 682                 enum ath_reset_type type;
 683
 684                 if (status & ATH9K_INT_FATAL)
 685                         type = RESET_TYPE_FATAL_INT;
 686                 else
 687                         type = RESET_TYPE_BB_WATCHDOG;
 688
 689                 RESET_STAT_INC(sc, type);
 690 #endif
 691                 ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
 692                 goto out;
 693         }
 694
 695         if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) {
 696                 /*
 697                  * TSF sync does not look correct; remain awake to sync with
 698                  * the next Beacon.
 699                  */
 700                 ath_dbg(common, PS, "TSFOOR - Sync with next Beacon\n");
 701                 sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC;
 702         }
 703
 704         if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
 705                 rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL |
 706                           ATH9K_INT_RXORN);
 707         else
 708                 rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
 709
 710         if (status & rxmask) {
 711                 /* Check for high priority Rx first */
 712                 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
 713                     (status & ATH9K_INT_RXHP))
 714                         ath_rx_tasklet(sc, 0, true);
 715
 716                 ath_rx_tasklet(sc, 0, false);
 717         }
 718
 719         if (status & ATH9K_INT_TX) {
 720                 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
 721                         ath_tx_edma_tasklet(sc);
 722                 else
 723                         ath_tx_tasklet(sc);
 724         }
 725
 726         ath9k_btcoex_handle_interrupt(sc, status);
 727
 728 out:
 729         /* re-enable hardware interrupt */
 730         ath9k_hw_enable_interrupts(ah);
 731
 732         spin_unlock(&sc->sc_pcu_lock);
 733         ath9k_ps_restore(sc);
 734 }
 735
 736 irqreturn_t ath_isr(int irq, void *dev)
 737 {
 738 #define SCHED_INTR (                            \
 739                 ATH9K_INT_FATAL |               \
 740                 ATH9K_INT_BB_WATCHDOG |         \
 741                 ATH9K_INT_RXORN |               \
 742                 ATH9K_INT_RXEOL |               \
 743                 ATH9K_INT_RX |                  \
 744                 ATH9K_INT_RXLP |                \
 745                 ATH9K_INT_RXHP |                \
 746                 ATH9K_INT_TX |                  \
 747                 ATH9K_INT_BMISS |               \
 748                 ATH9K_INT_CST |                 \
 749                 ATH9K_INT_TSFOOR |              \
 750                 ATH9K_INT_GENTIMER |            \
 751                 ATH9K_INT_MCI)
 752
 753         struct ath_softc *sc = dev;
 754         struct ath_hw *ah = sc->sc_ah;
 755         struct ath_common *common = ath9k_hw_common(ah);
 756         enum ath9k_int status;
 757         bool sched = false;
 758
 759         /*
 760          * The hardware is not ready/present, don't
 761          * touch anything. Note this can happen early
 762          * on if the IRQ is shared.
 763          */
 764         if (sc->sc_flags & SC_OP_INVALID)
 765                 return IRQ_NONE;
 766
 767
 768         /* shared irq, not for us */
 769
 770         if (!ath9k_hw_intrpend(ah))
 771                 return IRQ_NONE;
 772
 773         /*
 774          * Figure out the reason(s) for the interrupt.  Note
 775          * that the hal returns a pseudo-ISR that may include
 776          * bits we haven't explicitly enabled so we mask the
 777          * value to insure we only process bits we requested.
 778          */
 779         ath9k_hw_getisr(ah, &status);   /* NB: clears ISR too */
 780         status &= ah->imask;    /* discard unasked-for bits */
 781
 782         /*
 783          * If there are no status bits set, then this interrupt was not
 784          * for me (should have been caught above).
 785          */
 786         if (!status)
 787                 return IRQ_NONE;
 788
 789         /* Cache the status */
 790         sc->intrstatus = status;
 791
 792         if (status & SCHED_INTR)
 793                 sched = true;
 794
 795         /*
 796          * If a FATAL or RXORN interrupt is received, we have to reset the
 797          * chip immediately.
 798          */
 799         if ((status & ATH9K_INT_FATAL) || ((status & ATH9K_INT_RXORN) &&
 800             !(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)))
 801                 goto chip_reset;
 802
 803         if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
 804             (status & ATH9K_INT_BB_WATCHDOG)) {
 805
 806                 spin_lock(&common->cc_lock);
 807                 ath_hw_cycle_counters_update(common);
 808                 ar9003_hw_bb_watchdog_dbg_info(ah);
 809                 spin_unlock(&common->cc_lock);
 810
 811                 goto chip_reset;
 812         }
 813
 814         if (status & ATH9K_INT_SWBA)
 815                 tasklet_schedule(&sc->bcon_tasklet);
 816
 817         if (status & ATH9K_INT_TXURN)
 818                 ath9k_hw_updatetxtriglevel(ah, true);
 819
 820         if (status & ATH9K_INT_RXEOL) {
 821                 ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
 822                 ath9k_hw_set_interrupts(ah);
 823         }
 824
 825         if (status & ATH9K_INT_MIB) {
 826                 /*
 827                  * Disable interrupts until we service the MIB
 828                  * interrupt; otherwise it will continue to
 829                  * fire.
 830                  */
 831                 ath9k_hw_disable_interrupts(ah);
 832                 /*
 833                  * Let the hal handle the event. We assume
 834                  * it will clear whatever condition caused
 835                  * the interrupt.
 836                  */
 837                 spin_lock(&common->cc_lock);
 838                 ath9k_hw_proc_mib_event(ah);
 839                 spin_unlock(&common->cc_lock);
 840                 ath9k_hw_enable_interrupts(ah);
 841         }
 842
 843         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
 844                 if (status & ATH9K_INT_TIM_TIMER) {
 845                         if (ATH_DBG_WARN_ON_ONCE(sc->ps_idle))
 846                                 goto chip_reset;
 847                         /* Clear RxAbort bit so that we can
 848                          * receive frames */
 849                         ath9k_setpower(sc, ATH9K_PM_AWAKE);
 850                         ath9k_hw_setrxabort(sc->sc_ah, 0);
 851                         sc->ps_flags |= PS_WAIT_FOR_BEACON;
 852                 }
 853
 854 chip_reset:
 855
 856         ath_debug_stat_interrupt(sc, status);
 857
 858         if (sched) {
 859                 /* turn off every interrupt */
 860                 ath9k_hw_disable_interrupts(ah);
 861                 tasklet_schedule(&sc->intr_tq);
 862         }
 863
 864         return IRQ_HANDLED;
 865
 866 #undef SCHED_INTR
 867 }
 868
 869 static int ath_reset(struct ath_softc *sc, bool retry_tx)
 870 {
 871         int r;
 872
 873         ath9k_ps_wakeup(sc);
 874
 875         r = ath_reset_internal(sc, NULL, retry_tx);
 876
 877         if (retry_tx) {
 878                 int i;
 879                 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
 880                         if (ATH_TXQ_SETUP(sc, i)) {
 881                                 spin_lock_bh(&sc->tx.txq[i].axq_lock);
 882                                 ath_txq_schedule(sc, &sc->tx.txq[i]);
 883                                 spin_unlock_bh(&sc->tx.txq[i].axq_lock);
 884                         }
 885                 }
 886         }
 887
 888         ath9k_ps_restore(sc);
 889
 890         return r;
 891 }
 892
 893 void ath_reset_work(struct work_struct *work)
 894 {
 895         struct ath_softc *sc = container_of(work, struct ath_softc, hw_reset_work);
 896
 897         ath_reset(sc, true);
 898 }
 899
 900 void ath_hw_check(struct work_struct *work)
 901 {
 902         struct ath_softc *sc = container_of(work, struct ath_softc, hw_check_work);
 903         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 904         unsigned long flags;
 905         int busy;
 906         u8 is_alive, nbeacon = 1;
 907
 908         ath9k_ps_wakeup(sc);
 909         is_alive = ath9k_hw_check_alive(sc->sc_ah);
 910
 911         if (is_alive && !AR_SREV_9300(sc->sc_ah))
 912                 goto out;
 913         else if (!is_alive && AR_SREV_9300(sc->sc_ah)) {
 914                 ath_dbg(common, RESET,
 915                         "DCU stuck is detected. Schedule chip reset\n");
 916                 RESET_STAT_INC(sc, RESET_TYPE_MAC_HANG);
 917                 goto sched_reset;
 918         }
 919
 920         spin_lock_irqsave(&common->cc_lock, flags);
 921         busy = ath_update_survey_stats(sc);
 922         spin_unlock_irqrestore(&common->cc_lock, flags);
 923
 924         ath_dbg(common, RESET, "Possible baseband hang, busy=%d (try %d)\n",
 925                 busy, sc->hw_busy_count + 1);
 926         if (busy >= 99) {
 927                 if (++sc->hw_busy_count >= 3) {
 928                         RESET_STAT_INC(sc, RESET_TYPE_BB_HANG);
 929                         goto sched_reset;
 930                 }
 931         } else if (busy >= 0) {
 932                 sc->hw_busy_count = 0;
 933                 nbeacon = 3;
 934         }
 935
 936         ath_start_rx_poll(sc, nbeacon);
 937         goto out;
 938
 939 sched_reset:
 940         ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
 941 out:
 942         ath9k_ps_restore(sc);
 943 }
 944
 945 static void ath_hw_pll_rx_hang_check(struct ath_softc *sc, u32 pll_sqsum)
 946 {
 947         static int count;
 948         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 949
 950         if (pll_sqsum >= 0x40000) {
 951                 count++;
 952                 if (count == 3) {
 953                         /* Rx is hung for more than 500ms. Reset it */
 954                         ath_dbg(common, RESET, "Possible RX hang, resetting\n");
 955                         RESET_STAT_INC(sc, RESET_TYPE_PLL_HANG);
 956                         ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
 957                         count = 0;
 958                 }
 959         } else
 960                 count = 0;
 961 }
 962
 963 void ath_hw_pll_work(struct work_struct *work)
 964 {
 965         struct ath_softc *sc = container_of(work, struct ath_softc,
 966                                             hw_pll_work.work);
 967         u32 pll_sqsum;
 968
 969         if (AR_SREV_9485(sc->sc_ah)) {
 970
 971                 ath9k_ps_wakeup(sc);
 972                 pll_sqsum = ar9003_get_pll_sqsum_dvc(sc->sc_ah);
 973                 ath9k_ps_restore(sc);
 974
 975                 ath_hw_pll_rx_hang_check(sc, pll_sqsum);
 976
 977                 ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/5);
 978         }
 979 }
 980
 981 /**********************/
 982 /* mac80211 callbacks */
 983 /**********************/
 984
 985 static int ath9k_start(struct ieee80211_hw *hw)
 986 {
 987         struct ath_softc *sc = hw->priv;
 988         struct ath_hw *ah = sc->sc_ah;
 989         struct ath_common *common = ath9k_hw_common(ah);
 990         struct ieee80211_channel *curchan = hw->conf.channel;
 991         struct ath9k_channel *init_channel;
 992         int r;
 993
 994         ath_dbg(common, CONFIG,
 995                 "Starting driver with initial channel: %d MHz\n",
 996                 curchan->center_freq);
 997
 998         ath9k_ps_wakeup(sc);
 999         mutex_lock(&sc->mutex);
1000
1001         init_channel = ath9k_cmn_get_curchannel(hw, ah);
1002
1003         /* Reset SERDES registers */
1004         ath9k_hw_configpcipowersave(ah, false);
1005
1006         /*
1007          * The basic interface to setting the hardware in a good
1008          * state is ``reset''.  On return the hardware is known to
1009          * be powered up and with interrupts disabled.  This must
1010          * be followed by initialization of the appropriate bits
1011          * and then setup of the interrupt mask.
1012          */
1013         spin_lock_bh(&sc->sc_pcu_lock);
1014
1015         atomic_set(&ah->intr_ref_cnt, -1);
1016
1017         r = ath9k_hw_reset(ah, init_channel, ah->caldata, false);
1018         if (r) {
1019                 ath_err(common,
1020                         "Unable to reset hardware; reset status %d (freq %u MHz)\n",
1021                         r, curchan->center_freq);
1022                 spin_unlock_bh(&sc->sc_pcu_lock);
1023                 goto mutex_unlock;
1024         }
1025
1026         /* Setup our intr mask. */
1027         ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL |
1028                     ATH9K_INT_RXORN | ATH9K_INT_FATAL |
1029                     ATH9K_INT_GLOBAL;
1030
1031         if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
1032                 ah->imask |= ATH9K_INT_RXHP |
1033                              ATH9K_INT_RXLP |
1034                              ATH9K_INT_BB_WATCHDOG;
1035         else
1036                 ah->imask |= ATH9K_INT_RX;
1037
1038         ah->imask |= ATH9K_INT_GTT;
1039
1040         if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
1041                 ah->imask |= ATH9K_INT_CST;
1042
1043         if (ah->caps.hw_caps & ATH9K_HW_CAP_MCI)
1044                 ah->imask |= ATH9K_INT_MCI;
1045
1046         sc->sc_flags &= ~SC_OP_INVALID;
1047         sc->sc_ah->is_monitoring = false;
1048
1049         if (!ath_complete_reset(sc, false)) {
1050                 r = -EIO;
1051                 spin_unlock_bh(&sc->sc_pcu_lock);
1052                 goto mutex_unlock;
1053         }
1054
1055         if (ah->led_pin >= 0) {
1056                 ath9k_hw_cfg_output(ah, ah->led_pin,
1057                                     AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
1058                 ath9k_hw_set_gpio(ah, ah->led_pin, 0);
1059         }
1060
1061         /*
1062          * Reset key cache to sane defaults (all entries cleared) instead of
1063          * semi-random values after suspend/resume.
1064          */
1065         ath9k_cmn_init_crypto(sc->sc_ah);
1066
1067         spin_unlock_bh(&sc->sc_pcu_lock);
1068
1069         ath9k_start_btcoex(sc);
1070
1071         if (ah->caps.pcie_lcr_extsync_en && common->bus_ops->extn_synch_en)
1072                 common->bus_ops->extn_synch_en(common);
1073
1074 mutex_unlock:
1075         mutex_unlock(&sc->mutex);
1076
1077         ath9k_ps_restore(sc);
1078
1079         return r;
1080 }
1081
1082 static void ath9k_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
1083 {
1084         struct ath_softc *sc = hw->priv;
1085         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1086         struct ath_tx_control txctl;
1087         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1088
1089         if (sc->ps_enabled) {
1090                 /*
1091                  * mac80211 does not set PM field for normal data frames, so we
1092                  * need to update that based on the current PS mode.
1093                  */
1094                 if (ieee80211_is_data(hdr->frame_control) &&
1095                     !ieee80211_is_nullfunc(hdr->frame_control) &&
1096                     !ieee80211_has_pm(hdr->frame_control)) {
1097                         ath_dbg(common, PS,
1098                                 "Add PM=1 for a TX frame while in PS mode\n");
1099                         hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1100                 }
1101         }
1102
1103         /*
1104          * Cannot tx while the hardware is in full sleep, it first needs a full
1105          * chip reset to recover from that
1106          */
1107         if (unlikely(sc->sc_ah->power_mode == ATH9K_PM_FULL_SLEEP))
1108                 goto exit;
1109
1110         if (unlikely(sc->sc_ah->power_mode != ATH9K_PM_AWAKE)) {
1111                 /*
1112                  * We are using PS-Poll and mac80211 can request TX while in
1113                  * power save mode. Need to wake up hardware for the TX to be
1114                  * completed and if needed, also for RX of buffered frames.
1115                  */
1116                 ath9k_ps_wakeup(sc);
1117                 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
1118                         ath9k_hw_setrxabort(sc->sc_ah, 0);
1119                 if (ieee80211_is_pspoll(hdr->frame_control)) {
1120                         ath_dbg(common, PS,
1121                                 "Sending PS-Poll to pick a buffered frame\n");
1122                         sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA;
1123                 } else {
1124                         ath_dbg(common, PS, "Wake up to complete TX\n");
1125                         sc->ps_flags |= PS_WAIT_FOR_TX_ACK;
1126                 }
1127                 /*
1128                  * The actual restore operation will happen only after
1129                  * the sc_flags bit is cleared. We are just dropping
1130                  * the ps_usecount here.
1131                  */
1132                 ath9k_ps_restore(sc);
1133         }
1134
1135         memset(&txctl, 0, sizeof(struct ath_tx_control));
1136         txctl.txq = sc->tx.txq_map[skb_get_queue_mapping(skb)];
1137
1138         ath_dbg(common, XMIT, "transmitting packet, skb: %p\n", skb);
1139
1140         if (ath_tx_start(hw, skb, &txctl) != 0) {
1141                 ath_dbg(common, XMIT, "TX failed\n");
1142                 TX_STAT_INC(txctl.txq->axq_qnum, txfailed);
1143                 goto exit;
1144         }
1145
1146         return;
1147 exit:
1148         dev_kfree_skb_any(skb);
1149 }
1150
1151 static void ath9k_stop(struct ieee80211_hw *hw)
1152 {
1153         struct ath_softc *sc = hw->priv;
1154         struct ath_hw *ah = sc->sc_ah;
1155         struct ath_common *common = ath9k_hw_common(ah);
1156         bool prev_idle;
1157
1158         mutex_lock(&sc->mutex);
1159
1160         ath_cancel_work(sc);
1161         del_timer_sync(&sc->rx_poll_timer);
1162
1163         if (sc->sc_flags & SC_OP_INVALID) {
1164                 ath_dbg(common, ANY, "Device not present\n");
1165                 mutex_unlock(&sc->mutex);
1166                 return;
1167         }
1168
1169         /* Ensure HW is awake when we try to shut it down. */
1170         ath9k_ps_wakeup(sc);
1171
1172         ath9k_stop_btcoex(sc);
1173
1174         spin_lock_bh(&sc->sc_pcu_lock);
1175
1176         /* prevent tasklets to enable interrupts once we disable them */
1177         ah->imask &= ~ATH9K_INT_GLOBAL;
1178
1179         /* make sure h/w will not generate any interrupt
1180          * before setting the invalid flag. */
1181         ath9k_hw_disable_interrupts(ah);
1182
1183         spin_unlock_bh(&sc->sc_pcu_lock);
1184
1185         /* we can now sync irq and kill any running tasklets, since we already
1186          * disabled interrupts and not holding a spin lock */
1187         synchronize_irq(sc->irq);
1188         tasklet_kill(&sc->intr_tq);
1189         tasklet_kill(&sc->bcon_tasklet);
1190
1191         prev_idle = sc->ps_idle;
1192         sc->ps_idle = true;
1193
1194         spin_lock_bh(&sc->sc_pcu_lock);
1195
1196         if (ah->led_pin >= 0) {
1197                 ath9k_hw_set_gpio(ah, ah->led_pin, 1);
1198                 ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
1199         }
1200
1201         ath_prepare_reset(sc, false, true);
1202
1203         if (sc->rx.frag) {
1204                 dev_kfree_skb_any(sc->rx.frag);
1205                 sc->rx.frag = NULL;
1206         }
1207
1208         if (!ah->curchan)
1209                 ah->curchan = ath9k_cmn_get_curchannel(hw, ah);
1210
1211         ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
1212         ath9k_hw_phy_disable(ah);
1213
1214         ath9k_hw_configpcipowersave(ah, true);
1215
1216         spin_unlock_bh(&sc->sc_pcu_lock);
1217
1218         ath9k_ps_restore(sc);
1219
1220         sc->sc_flags |= SC_OP_INVALID;
1221         sc->ps_idle = prev_idle;
1222
1223         mutex_unlock(&sc->mutex);
1224
1225         ath_dbg(common, CONFIG, "Driver halt\n");
1226 }
1227
1228 bool ath9k_uses_beacons(int type)
1229 {
1230         switch (type) {
1231         case NL80211_IFTYPE_AP:
1232         case NL80211_IFTYPE_ADHOC:
1233         case NL80211_IFTYPE_MESH_POINT:
1234                 return true;
1235         default:
1236                 return false;
1237         }
1238 }
1239
1240 static void ath9k_reclaim_beacon(struct ath_softc *sc,
1241                                  struct ieee80211_vif *vif)
1242 {
1243         struct ath_vif *avp = (void *)vif->drv_priv;
1244
1245         ath9k_set_beaconing_status(sc, false);
1246         ath_beacon_return(sc, avp);
1247         ath9k_set_beaconing_status(sc, true);
1248 }
1249
1250 static void ath9k_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1251 {
1252         struct ath9k_vif_iter_data *iter_data = data;
1253         int i;
1254
1255         if (iter_data->hw_macaddr)
1256                 for (i = 0; i < ETH_ALEN; i++)
1257                         iter_data->mask[i] &=
1258                                 ~(iter_data->hw_macaddr[i] ^ mac[i]);
1259
1260         switch (vif->type) {
1261         case NL80211_IFTYPE_AP:
1262                 iter_data->naps++;
1263                 break;
1264         case NL80211_IFTYPE_STATION:
1265                 iter_data->nstations++;
1266                 break;
1267         case NL80211_IFTYPE_ADHOC:
1268                 iter_data->nadhocs++;
1269                 break;
1270         case NL80211_IFTYPE_MESH_POINT:
1271                 iter_data->nmeshes++;
1272                 break;
1273         case NL80211_IFTYPE_WDS:
1274                 iter_data->nwds++;
1275                 break;
1276         default:
1277                 break;
1278         }
1279 }
1280
1281 /* Called with sc->mutex held. */
1282 void ath9k_calculate_iter_data(struct ieee80211_hw *hw,
1283                                struct ieee80211_vif *vif,
1284                                struct ath9k_vif_iter_data *iter_data)
1285 {
1286         struct ath_softc *sc = hw->priv;
1287         struct ath_hw *ah = sc->sc_ah;
1288         struct ath_common *common = ath9k_hw_common(ah);
1289
1290         /*
1291          * Use the hardware MAC address as reference, the hardware uses it
1292          * together with the BSSID mask when matching addresses.
1293          */
1294         memset(iter_data, 0, sizeof(*iter_data));
1295         iter_data->hw_macaddr = common->macaddr;
1296         memset(&iter_data->mask, 0xff, ETH_ALEN);
1297
1298         if (vif)
1299                 ath9k_vif_iter(iter_data, vif->addr, vif);
1300
1301         /* Get list of all active MAC addresses */
1302         ieee80211_iterate_active_interfaces_atomic(sc->hw, ath9k_vif_iter,
1303                                                    iter_data);
1304 }
1305
1306 /* Called with sc->mutex held. */
1307 static void ath9k_calculate_summary_state(struct ieee80211_hw *hw,
1308                                           struct ieee80211_vif *vif)
1309 {
1310         struct ath_softc *sc = hw->priv;
1311         struct ath_hw *ah = sc->sc_ah;
1312         struct ath_common *common = ath9k_hw_common(ah);
1313         struct ath9k_vif_iter_data iter_data;
1314
1315         ath9k_calculate_iter_data(hw, vif, &iter_data);
1316
1317         /* Set BSSID mask. */
1318         memcpy(common->bssidmask, iter_data.mask, ETH_ALEN);
1319         ath_hw_setbssidmask(common);
1320
1321         /* Set op-mode & TSF */
1322         if (iter_data.naps > 0) {
1323                 ath9k_hw_set_tsfadjust(ah, 1);
1324                 sc->sc_flags |= SC_OP_TSF_RESET;
1325                 ah->opmode = NL80211_IFTYPE_AP;
1326         } else {
1327                 ath9k_hw_set_tsfadjust(ah, 0);
1328                 sc->sc_flags &= ~SC_OP_TSF_RESET;
1329
1330                 if (iter_data.nmeshes)
1331                         ah->opmode = NL80211_IFTYPE_MESH_POINT;
1332                 else if (iter_data.nwds)
1333                         ah->opmode = NL80211_IFTYPE_AP;
1334                 else if (iter_data.nadhocs)
1335                         ah->opmode = NL80211_IFTYPE_ADHOC;
1336                 else
1337                         ah->opmode = NL80211_IFTYPE_STATION;
1338         }
1339
1340         /*
1341          * Enable MIB interrupts when there are hardware phy counters.
1342          */
1343         if ((iter_data.nstations + iter_data.nadhocs + iter_data.nmeshes) > 0) {
1344                 if (ah->config.enable_ani)
1345                         ah->imask |= ATH9K_INT_MIB;
1346                 ah->imask |= ATH9K_INT_TSFOOR;
1347         } else {
1348                 ah->imask &= ~ATH9K_INT_MIB;
1349                 ah->imask &= ~ATH9K_INT_TSFOOR;
1350         }
1351
1352         ath9k_hw_set_interrupts(ah);
1353
1354         /* Set up ANI */
1355         if (iter_data.naps > 0) {
1356                 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
1357
1358                 if (!common->disable_ani) {
1359                         sc->sc_flags |= SC_OP_ANI_RUN;
1360                         ath_start_ani(common);
1361                 }
1362
1363         } else {
1364                 sc->sc_flags &= ~SC_OP_ANI_RUN;
1365                 del_timer_sync(&common->ani.timer);
1366         }
1367 }
1368
1369 /* Called with sc->mutex held, vif counts set up properly. */
1370 static void ath9k_do_vif_add_setup(struct ieee80211_hw *hw,
1371                                    struct ieee80211_vif *vif)
1372 {
1373         struct ath_softc *sc = hw->priv;
1374
1375         ath9k_calculate_summary_state(hw, vif);
1376
1377         if (ath9k_uses_beacons(vif->type)) {
1378                 /* Reserve a beacon slot for the vif */
1379                 ath9k_set_beaconing_status(sc, false);
1380                 ath_beacon_alloc(sc, vif);
1381                 ath9k_set_beaconing_status(sc, true);
1382         }
1383 }
1384
1385 void ath_start_rx_poll(struct ath_softc *sc, u8 nbeacon)
1386 {
1387         if (!AR_SREV_9300(sc->sc_ah))
1388                 return;
1389
1390         if (!(sc->sc_flags & SC_OP_PRIM_STA_VIF))
1391                 return;
1392
1393         mod_timer(&sc->rx_poll_timer, jiffies + msecs_to_jiffies
1394                         (nbeacon * sc->cur_beacon_conf.beacon_interval));
1395 }
1396
1397 void ath_rx_poll(unsigned long data)
1398 {
1399         struct ath_softc *sc = (struct ath_softc *)data;
1400
1401         ieee80211_queue_work(sc->hw, &sc->hw_check_work);
1402 }
1403
1404 static int ath9k_add_interface(struct ieee80211_hw *hw,
1405                                struct ieee80211_vif *vif)
1406 {
1407         struct ath_softc *sc = hw->priv;
1408         struct ath_hw *ah = sc->sc_ah;
1409         struct ath_common *common = ath9k_hw_common(ah);
1410         int ret = 0;
1411
1412         ath9k_ps_wakeup(sc);
1413         mutex_lock(&sc->mutex);
1414
1415         switch (vif->type) {
1416         case NL80211_IFTYPE_STATION:
1417         case NL80211_IFTYPE_WDS:
1418         case NL80211_IFTYPE_ADHOC:
1419         case NL80211_IFTYPE_AP:
1420         case NL80211_IFTYPE_MESH_POINT:
1421                 break;
1422         default:
1423                 ath_err(common, "Interface type %d not yet supported\n",
1424                         vif->type);
1425                 ret = -EOPNOTSUPP;
1426                 goto out;
1427         }
1428
1429         if (ath9k_uses_beacons(vif->type)) {
1430                 if (sc->nbcnvifs >= ATH_BCBUF) {
1431                         ath_err(common, "Not enough beacon buffers when adding"
1432                                 " new interface of type: %i\n",
1433                                 vif->type);
1434                         ret = -ENOBUFS;
1435                         goto out;
1436                 }
1437         }
1438
1439         if ((ah->opmode == NL80211_IFTYPE_ADHOC) ||
1440             ((vif->type == NL80211_IFTYPE_ADHOC) &&
1441              sc->nvifs > 0)) {
1442                 ath_err(common, "Cannot create ADHOC interface when other"
1443                         " interfaces already exist.\n");
1444                 ret = -EINVAL;
1445                 goto out;
1446         }
1447
1448         ath_dbg(common, CONFIG, "Attach a VIF of type: %d\n", vif->type);
1449
1450         sc->nvifs++;
1451
1452         ath9k_do_vif_add_setup(hw, vif);
1453 out:
1454         mutex_unlock(&sc->mutex);
1455         ath9k_ps_restore(sc);
1456         return ret;
1457 }
1458
1459 static int ath9k_change_interface(struct ieee80211_hw *hw,
1460                                   struct ieee80211_vif *vif,
1461                                   enum nl80211_iftype new_type,
1462                                   bool p2p)
1463 {
1464         struct ath_softc *sc = hw->priv;
1465         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1466         int ret = 0;
1467
1468         ath_dbg(common, CONFIG, "Change Interface\n");
1469         mutex_lock(&sc->mutex);
1470         ath9k_ps_wakeup(sc);
1471
1472         /* See if new interface type is valid. */
1473         if ((new_type == NL80211_IFTYPE_ADHOC) &&
1474             (sc->nvifs > 1)) {
1475                 ath_err(common, "When using ADHOC, it must be the only"
1476                         " interface.\n");
1477                 ret = -EINVAL;
1478                 goto out;
1479         }
1480
1481         if (ath9k_uses_beacons(new_type) &&
1482             !ath9k_uses_beacons(vif->type)) {
1483                 if (sc->nbcnvifs >= ATH_BCBUF) {
1484                         ath_err(common, "No beacon slot available\n");
1485                         ret = -ENOBUFS;
1486                         goto out;
1487                 }
1488         }
1489
1490         /* Clean up old vif stuff */
1491         if (ath9k_uses_beacons(vif->type))
1492                 ath9k_reclaim_beacon(sc, vif);
1493
1494         /* Add new settings */
1495         vif->type = new_type;
1496         vif->p2p = p2p;
1497
1498         ath9k_do_vif_add_setup(hw, vif);
1499 out:
1500         ath9k_ps_restore(sc);
1501         mutex_unlock(&sc->mutex);
1502         return ret;
1503 }
1504
1505 static void ath9k_remove_interface(struct ieee80211_hw *hw,
1506                                    struct ieee80211_vif *vif)
1507 {
1508         struct ath_softc *sc = hw->priv;
1509         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1510
1511         ath_dbg(common, CONFIG, "Detach Interface\n");
1512
1513         ath9k_ps_wakeup(sc);
1514         mutex_lock(&sc->mutex);
1515
1516         sc->nvifs--;
1517
1518         /* Reclaim beacon resources */
1519         if (ath9k_uses_beacons(vif->type))
1520                 ath9k_reclaim_beacon(sc, vif);
1521
1522         ath9k_calculate_summary_state(hw, NULL);
1523
1524         mutex_unlock(&sc->mutex);
1525         ath9k_ps_restore(sc);
1526 }
1527
1528 static void ath9k_enable_ps(struct ath_softc *sc)
1529 {
1530         struct ath_hw *ah = sc->sc_ah;
1531
1532         sc->ps_enabled = true;
1533         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1534                 if ((ah->imask & ATH9K_INT_TIM_TIMER) == 0) {
1535                         ah->imask |= ATH9K_INT_TIM_TIMER;
1536                         ath9k_hw_set_interrupts(ah);
1537                 }
1538                 ath9k_hw_setrxabort(ah, 1);
1539         }
1540 }
1541
1542 static void ath9k_disable_ps(struct ath_softc *sc)
1543 {
1544         struct ath_hw *ah = sc->sc_ah;
1545
1546         sc->ps_enabled = false;
1547         ath9k_hw_setpower(ah, ATH9K_PM_AWAKE);
1548         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1549                 ath9k_hw_setrxabort(ah, 0);
1550                 sc->ps_flags &= ~(PS_WAIT_FOR_BEACON |
1551                                   PS_WAIT_FOR_CAB |
1552                                   PS_WAIT_FOR_PSPOLL_DATA |
1553                                   PS_WAIT_FOR_TX_ACK);
1554                 if (ah->imask & ATH9K_INT_TIM_TIMER) {
1555                         ah->imask &= ~ATH9K_INT_TIM_TIMER;
1556                         ath9k_hw_set_interrupts(ah);
1557                 }
1558         }
1559
1560 }
1561
1562 static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
1563 {
1564         struct ath_softc *sc = hw->priv;
1565         struct ath_hw *ah = sc->sc_ah;
1566         struct ath_common *common = ath9k_hw_common(ah);
1567         struct ieee80211_conf *conf = &hw->conf;
1568
1569         ath9k_ps_wakeup(sc);
1570         mutex_lock(&sc->mutex);
1571
1572         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
1573                 sc->ps_idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1574                 if (sc->ps_idle)
1575                         ath_cancel_work(sc);
1576         }
1577
1578         /*
1579          * We just prepare to enable PS. We have to wait until our AP has
1580          * ACK'd our null data frame to disable RX otherwise we'll ignore
1581          * those ACKs and end up retransmitting the same null data frames.
1582          * IEEE80211_CONF_CHANGE_PS is only passed by mac80211 for STA mode.
1583          */
1584         if (changed & IEEE80211_CONF_CHANGE_PS) {
1585                 unsigned long flags;
1586                 spin_lock_irqsave(&sc->sc_pm_lock, flags);
1587                 if (conf->flags & IEEE80211_CONF_PS)
1588                         ath9k_enable_ps(sc);
1589                 else
1590                         ath9k_disable_ps(sc);
1591                 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1592         }
1593
1594         if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
1595                 if (conf->flags & IEEE80211_CONF_MONITOR) {
1596                         ath_dbg(common, CONFIG, "Monitor mode is enabled\n");
1597                         sc->sc_ah->is_monitoring = true;
1598                 } else {
1599                         ath_dbg(common, CONFIG, "Monitor mode is disabled\n");
1600                         sc->sc_ah->is_monitoring = false;
1601                 }
1602         }
1603
1604         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1605                 struct ieee80211_channel *curchan = hw->conf.channel;
1606                 int pos = curchan->hw_value;
1607                 int old_pos = -1;
1608                 unsigned long flags;
1609
1610                 if (ah->curchan)
1611                         old_pos = ah->curchan - &ah->channels[0];
1612
1613                 if (hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)
1614                         sc->sc_flags |= SC_OP_OFFCHANNEL;
1615                 else
1616                         sc->sc_flags &= ~SC_OP_OFFCHANNEL;
1617
1618                 ath_dbg(common, CONFIG, "Set channel: %d MHz type: %d\n",
1619                         curchan->center_freq, conf->channel_type);
1620
1621                 /* update survey stats for the old channel before switching */
1622                 spin_lock_irqsave(&common->cc_lock, flags);
1623                 ath_update_survey_stats(sc);
1624                 spin_unlock_irqrestore(&common->cc_lock, flags);
1625
1626                 /*
1627                  * Preserve the current channel values, before updating
1628                  * the same channel
1629                  */
1630                 if (ah->curchan && (old_pos == pos))
1631                         ath9k_hw_getnf(ah, ah->curchan);
1632
1633                 ath9k_cmn_update_ichannel(&sc->sc_ah->channels[pos],
1634                                           curchan, conf->channel_type);
1635
1636                 /*
1637                  * If the operating channel changes, change the survey in-use flags
1638                  * along with it.
1639                  * Reset the survey data for the new channel, unless we're switching
1640                  * back to the operating channel from an off-channel operation.
1641                  */
1642                 if (!(hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) &&
1643                     sc->cur_survey != &sc->survey[pos]) {
1644
1645                         if (sc->cur_survey)
1646                                 sc->cur_survey->filled &= ~SURVEY_INFO_IN_USE;
1647
1648                         sc->cur_survey = &sc->survey[pos];
1649
1650                         memset(sc->cur_survey, 0, sizeof(struct survey_info));
1651                         sc->cur_survey->filled |= SURVEY_INFO_IN_USE;
1652                 } else if (!(sc->survey[pos].filled & SURVEY_INFO_IN_USE)) {
1653                         memset(&sc->survey[pos], 0, sizeof(struct survey_info));
1654                 }
1655
1656                 if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) {
1657                         ath_err(common, "Unable to set channel\n");
1658                         mutex_unlock(&sc->mutex);
1659                         return -EINVAL;
1660                 }
1661
1662                 /*
1663                  * The most recent snapshot of channel->noisefloor for the old
1664                  * channel is only available after the hardware reset. Copy it to
1665                  * the survey stats now.
1666                  */
1667                 if (old_pos >= 0)
1668                         ath_update_survey_nf(sc, old_pos);
1669         }
1670
1671         if (changed & IEEE80211_CONF_CHANGE_POWER) {
1672                 ath_dbg(common, CONFIG, "Set power: %d\n", conf->power_level);
1673                 sc->config.txpowlimit = 2 * conf->power_level;
1674                 ath9k_cmn_update_txpow(ah, sc->curtxpow,
1675                                        sc->config.txpowlimit, &sc->curtxpow);
1676         }
1677
1678         mutex_unlock(&sc->mutex);
1679         ath9k_ps_restore(sc);
1680
1681         return 0;
1682 }
1683
1684 #define SUPPORTED_FILTERS                       \
1685         (FIF_PROMISC_IN_BSS |                   \
1686         FIF_ALLMULTI |                          \
1687         FIF_CONTROL |                           \
1688         FIF_PSPOLL |                            \
1689         FIF_OTHER_BSS |                         \
1690         FIF_BCN_PRBRESP_PROMISC |               \
1691         FIF_PROBE_REQ |                         \
1692         FIF_FCSFAIL)
1693
1694 /* FIXME: sc->sc_full_reset ? */
1695 static void ath9k_configure_filter(struct ieee80211_hw *hw,
1696                                    unsigned int changed_flags,
1697                                    unsigned int *total_flags,
1698                                    u64 multicast)
1699 {
1700         struct ath_softc *sc = hw->priv;
1701         u32 rfilt;
1702
1703         changed_flags &= SUPPORTED_FILTERS;
1704         *total_flags &= SUPPORTED_FILTERS;
1705
1706         sc->rx.rxfilter = *total_flags;
1707         ath9k_ps_wakeup(sc);
1708         rfilt = ath_calcrxfilter(sc);
1709         ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1710         ath9k_ps_restore(sc);
1711
1712         ath_dbg(ath9k_hw_common(sc->sc_ah), CONFIG, "Set HW RX filter: 0x%x\n",
1713                 rfilt);
1714 }
1715
1716 static int ath9k_sta_add(struct ieee80211_hw *hw,
1717                          struct ieee80211_vif *vif,
1718                          struct ieee80211_sta *sta)
1719 {
1720         struct ath_softc *sc = hw->priv;
1721         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1722         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1723         struct ieee80211_key_conf ps_key = { };
1724
1725         ath_node_attach(sc, sta, vif);
1726
1727         if (vif->type != NL80211_IFTYPE_AP &&
1728             vif->type != NL80211_IFTYPE_AP_VLAN)
1729                 return 0;
1730
1731         an->ps_key = ath_key_config(common, vif, sta, &ps_key);
1732
1733         return 0;
1734 }
1735
1736 static void ath9k_del_ps_key(struct ath_softc *sc,
1737                              struct ieee80211_vif *vif,
1738                              struct ieee80211_sta *sta)
1739 {
1740         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1741         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1742         struct ieee80211_key_conf ps_key = { .hw_key_idx = an->ps_key };
1743
1744         if (!an->ps_key)
1745             return;
1746
1747         ath_key_delete(common, &ps_key);
1748 }
1749
1750 static int ath9k_sta_remove(struct ieee80211_hw *hw,
1751                             struct ieee80211_vif *vif,
1752                             struct ieee80211_sta *sta)
1753 {
1754         struct ath_softc *sc = hw->priv;
1755
1756         ath9k_del_ps_key(sc, vif, sta);
1757         ath_node_detach(sc, sta);
1758
1759         return 0;
1760 }
1761
1762 static void ath9k_sta_notify(struct ieee80211_hw *hw,
1763                          struct ieee80211_vif *vif,
1764                          enum sta_notify_cmd cmd,
1765                          struct ieee80211_sta *sta)
1766 {
1767         struct ath_softc *sc = hw->priv;
1768         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1769
1770         if (!sta->ht_cap.ht_supported)
1771                 return;
1772
1773         switch (cmd) {
1774         case STA_NOTIFY_SLEEP:
1775                 an->sleeping = true;
1776                 ath_tx_aggr_sleep(sta, sc, an);
1777                 break;
1778         case STA_NOTIFY_AWAKE:
1779                 an->sleeping = false;
1780                 ath_tx_aggr_wakeup(sc, an);
1781                 break;
1782         }
1783 }
1784
1785 static int ath9k_conf_tx(struct ieee80211_hw *hw,
1786                          struct ieee80211_vif *vif, u16 queue,
1787                          const struct ieee80211_tx_queue_params *params)
1788 {
1789         struct ath_softc *sc = hw->priv;
1790         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1791         struct ath_txq *txq;
1792         struct ath9k_tx_queue_info qi;
1793         int ret = 0;
1794
1795         if (queue >= WME_NUM_AC)
1796                 return 0;
1797
1798         txq = sc->tx.txq_map[queue];
1799
1800         ath9k_ps_wakeup(sc);
1801         mutex_lock(&sc->mutex);
1802
1803         memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
1804
1805         qi.tqi_aifs = params->aifs;
1806         qi.tqi_cwmin = params->cw_min;
1807         qi.tqi_cwmax = params->cw_max;
1808         qi.tqi_burstTime = params->txop;
1809
1810         ath_dbg(common, CONFIG,
1811                 "Configure tx [queue/halq] [%d/%d], aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
1812                 queue, txq->axq_qnum, params->aifs, params->cw_min,
1813                 params->cw_max, params->txop);
1814
1815         ret = ath_txq_update(sc, txq->axq_qnum, &qi);
1816         if (ret)
1817                 ath_err(common, "TXQ Update failed\n");
1818
1819         if (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC)
1820                 if (queue == WME_AC_BE && !ret)
1821                         ath_beaconq_config(sc);
1822
1823         mutex_unlock(&sc->mutex);
1824         ath9k_ps_restore(sc);
1825
1826         return ret;
1827 }
1828
1829 static int ath9k_set_key(struct ieee80211_hw *hw,
1830                          enum set_key_cmd cmd,
1831                          struct ieee80211_vif *vif,
1832                          struct ieee80211_sta *sta,
1833                          struct ieee80211_key_conf *key)
1834 {
1835         struct ath_softc *sc = hw->priv;
1836         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1837         int ret = 0;
1838
1839         if (ath9k_modparam_nohwcrypt)
1840                 return -ENOSPC;
1841
1842         if ((vif->type == NL80211_IFTYPE_ADHOC ||
1843              vif->type == NL80211_IFTYPE_MESH_POINT) &&
1844             (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
1845              key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
1846             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
1847                 /*
1848                  * For now, disable hw crypto for the RSN IBSS group keys. This
1849                  * could be optimized in the future to use a modified key cache
1850                  * design to support per-STA RX GTK, but until that gets
1851                  * implemented, use of software crypto for group addressed
1852                  * frames is a acceptable to allow RSN IBSS to be used.
1853                  */
1854                 return -EOPNOTSUPP;
1855         }
1856
1857         mutex_lock(&sc->mutex);
1858         ath9k_ps_wakeup(sc);
1859         ath_dbg(common, CONFIG, "Set HW Key\n");
1860
1861         switch (cmd) {
1862         case SET_KEY:
1863                 if (sta)
1864                         ath9k_del_ps_key(sc, vif, sta);
1865
1866                 ret = ath_key_config(common, vif, sta, key);
1867                 if (ret >= 0) {
1868                         key->hw_key_idx = ret;
1869                         /* push IV and Michael MIC generation to stack */
1870                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1871                         if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
1872                                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1873                         if (sc->sc_ah->sw_mgmt_crypto &&
1874                             key->cipher == WLAN_CIPHER_SUITE_CCMP)
1875                                 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT;
1876                         ret = 0;
1877                 }
1878                 break;
1879         case DISABLE_KEY:
1880                 ath_key_delete(common, key);
1881                 break;
1882         default:
1883                 ret = -EINVAL;
1884         }
1885
1886         ath9k_ps_restore(sc);
1887         mutex_unlock(&sc->mutex);
1888
1889         return ret;
1890 }
1891 static void ath9k_bss_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1892 {
1893         struct ath_softc *sc = data;
1894         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1895         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1896         struct ath_vif *avp = (void *)vif->drv_priv;
1897
1898         /*
1899          * Skip iteration if primary station vif's bss info
1900          * was not changed
1901          */
1902         if (sc->sc_flags & SC_OP_PRIM_STA_VIF)
1903                 return;
1904
1905         if (bss_conf->assoc) {
1906                 sc->sc_flags |= SC_OP_PRIM_STA_VIF;
1907                 avp->primary_sta_vif = true;
1908                 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1909                 common->curaid = bss_conf->aid;
1910                 ath9k_hw_write_associd(sc->sc_ah);
1911                 ath_dbg(common, CONFIG, "Bss Info ASSOC %d, bssid: %pM\n",
1912                         bss_conf->aid, common->curbssid);
1913                 ath_beacon_config(sc, vif);
1914                 /*
1915                  * Request a re-configuration of Beacon related timers
1916                  * on the receipt of the first Beacon frame (i.e.,
1917                  * after time sync with the AP).
1918                  */
1919                 sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
1920                 /* Reset rssi stats */
1921                 sc->last_rssi = ATH_RSSI_DUMMY_MARKER;
1922                 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
1923
1924                 ath_start_rx_poll(sc, 3);
1925
1926                 if (!common->disable_ani) {
1927                         sc->sc_flags |= SC_OP_ANI_RUN;
1928                         ath_start_ani(common);
1929                 }
1930
1931         }
1932 }
1933
1934 static void ath9k_config_bss(struct ath_softc *sc, struct ieee80211_vif *vif)
1935 {
1936         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1937         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1938         struct ath_vif *avp = (void *)vif->drv_priv;
1939
1940         if (sc->sc_ah->opmode != NL80211_IFTYPE_STATION)
1941                 return;
1942
1943         /* Reconfigure bss info */
1944         if (avp->primary_sta_vif && !bss_conf->assoc) {
1945                 ath_dbg(common, CONFIG, "Bss Info DISASSOC %d, bssid %pM\n",
1946                         common->curaid, common->curbssid);
1947                 sc->sc_flags &= ~(SC_OP_PRIM_STA_VIF | SC_OP_BEACONS);
1948                 avp->primary_sta_vif = false;
1949                 memset(common->curbssid, 0, ETH_ALEN);
1950                 common->curaid = 0;
1951         }
1952
1953         ieee80211_iterate_active_interfaces_atomic(
1954                         sc->hw, ath9k_bss_iter, sc);
1955
1956         /*
1957          * None of station vifs are associated.
1958          * Clear bssid & aid
1959          */
1960         if (!(sc->sc_flags & SC_OP_PRIM_STA_VIF)) {
1961                 ath9k_hw_write_associd(sc->sc_ah);
1962                 /* Stop ANI */
1963                 sc->sc_flags &= ~SC_OP_ANI_RUN;
1964                 del_timer_sync(&common->ani.timer);
1965                 del_timer_sync(&sc->rx_poll_timer);
1966                 memset(&sc->caldata, 0, sizeof(sc->caldata));
1967         }
1968 }
1969
1970 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
1971                                    struct ieee80211_vif *vif,
1972                                    struct ieee80211_bss_conf *bss_conf,
1973                                    u32 changed)
1974 {
1975         struct ath_softc *sc = hw->priv;
1976         struct ath_hw *ah = sc->sc_ah;
1977         struct ath_common *common = ath9k_hw_common(ah);
1978         struct ath_vif *avp = (void *)vif->drv_priv;
1979         int slottime;
1980
1981         ath9k_ps_wakeup(sc);
1982         mutex_lock(&sc->mutex);
1983
1984         if (changed & BSS_CHANGED_ASSOC) {
1985                 ath9k_config_bss(sc, vif);
1986
1987                 ath_dbg(common, CONFIG, "BSSID: %pM aid: 0x%x\n",
1988                         common->curbssid, common->curaid);
1989         }
1990
1991         if (changed & BSS_CHANGED_IBSS) {
1992                 /* There can be only one vif available */
1993                 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1994                 common->curaid = bss_conf->aid;
1995                 ath9k_hw_write_associd(sc->sc_ah);
1996
1997                 if (bss_conf->ibss_joined) {
1998                         sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
1999
2000                         if (!common->disable_ani) {
2001                                 sc->sc_flags |= SC_OP_ANI_RUN;
2002                                 ath_start_ani(common);
2003                         }
2004
2005                 } else {
2006                         sc->sc_flags &= ~SC_OP_ANI_RUN;
2007                         del_timer_sync(&common->ani.timer);
2008                         del_timer_sync(&sc->rx_poll_timer);
2009                 }
2010         }
2011
2012         /*
2013          * In case of AP mode, the HW TSF has to be reset
2014          * when the beacon interval changes.
2015          */
2016         if ((changed & BSS_CHANGED_BEACON_INT) &&
2017             (vif->type == NL80211_IFTYPE_AP))
2018                 sc->sc_flags |= SC_OP_TSF_RESET;
2019
2020         /* Configure beaconing (AP, IBSS, MESH) */
2021         if (ath9k_uses_beacons(vif->type) &&
2022             ((changed & BSS_CHANGED_BEACON) ||
2023              (changed & BSS_CHANGED_BEACON_ENABLED) ||
2024              (changed & BSS_CHANGED_BEACON_INT))) {
2025                 ath9k_set_beaconing_status(sc, false);
2026                 if (bss_conf->enable_beacon)
2027                         ath_beacon_alloc(sc, vif);
2028                 else
2029                         avp->is_bslot_active = false;
2030                 ath_beacon_config(sc, vif);
2031                 ath9k_set_beaconing_status(sc, true);
2032         }
2033
2034         if (changed & BSS_CHANGED_ERP_SLOT) {
2035                 if (bss_conf->use_short_slot)
2036                         slottime = 9;
2037                 else
2038                         slottime = 20;
2039                 if (vif->type == NL80211_IFTYPE_AP) {
2040                         /*
2041                          * Defer update, so that connected stations can adjust
2042                          * their settings at the same time.
2043                          * See beacon.c for more details
2044                          */
2045                         sc->beacon.slottime = slottime;
2046                         sc->beacon.updateslot = UPDATE;
2047                 } else {
2048                         ah->slottime = slottime;
2049                         ath9k_hw_init_global_settings(ah);
2050                 }
2051         }
2052
2053         mutex_unlock(&sc->mutex);
2054         ath9k_ps_restore(sc);
2055 }
2056
2057 static u64 ath9k_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
2058 {
2059         struct ath_softc *sc = hw->priv;
2060         u64 tsf;
2061
2062         mutex_lock(&sc->mutex);
2063         ath9k_ps_wakeup(sc);
2064         tsf = ath9k_hw_gettsf64(sc->sc_ah);
2065         ath9k_ps_restore(sc);
2066         mutex_unlock(&sc->mutex);
2067
2068         return tsf;
2069 }
2070
2071 static void ath9k_set_tsf(struct ieee80211_hw *hw,
2072                           struct ieee80211_vif *vif,
2073                           u64 tsf)
2074 {
2075         struct ath_softc *sc = hw->priv;
2076
2077         mutex_lock(&sc->mutex);
2078         ath9k_ps_wakeup(sc);
2079         ath9k_hw_settsf64(sc->sc_ah, tsf);
2080         ath9k_ps_restore(sc);
2081         mutex_unlock(&sc->mutex);
2082 }
2083
2084 static void ath9k_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
2085 {
2086         struct ath_softc *sc = hw->priv;
2087
2088         mutex_lock(&sc->mutex);
2089
2090         ath9k_ps_wakeup(sc);
2091         ath9k_hw_reset_tsf(sc->sc_ah);
2092         ath9k_ps_restore(sc);
2093
2094         mutex_unlock(&sc->mutex);
2095 }
2096
2097 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
2098                               struct ieee80211_vif *vif,
2099                               enum ieee80211_ampdu_mlme_action action,
2100                               struct ieee80211_sta *sta,
2101                               u16 tid, u16 *ssn, u8 buf_size)
2102 {
2103         struct ath_softc *sc = hw->priv;
2104         int ret = 0;
2105
2106         local_bh_disable();
2107
2108         switch (action) {
2109         case IEEE80211_AMPDU_RX_START:
2110                 break;
2111         case IEEE80211_AMPDU_RX_STOP:
2112                 break;
2113         case IEEE80211_AMPDU_TX_START:
2114                 ath9k_ps_wakeup(sc);
2115                 ret = ath_tx_aggr_start(sc, sta, tid, ssn);
2116                 if (!ret)
2117                         ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2118                 ath9k_ps_restore(sc);
2119                 break;
2120         case IEEE80211_AMPDU_TX_STOP:
2121                 ath9k_ps_wakeup(sc);
2122                 ath_tx_aggr_stop(sc, sta, tid);
2123                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2124                 ath9k_ps_restore(sc);
2125                 break;
2126         case IEEE80211_AMPDU_TX_OPERATIONAL:
2127                 ath9k_ps_wakeup(sc);
2128                 ath_tx_aggr_resume(sc, sta, tid);
2129                 ath9k_ps_restore(sc);
2130                 break;
2131         default:
2132                 ath_err(ath9k_hw_common(sc->sc_ah), "Unknown AMPDU action\n");
2133         }
2134
2135         local_bh_enable();
2136
2137         return ret;
2138 }
2139
2140 static int ath9k_get_survey(struct ieee80211_hw *hw, int idx,
2141                              struct survey_info *survey)
2142 {
2143         struct ath_softc *sc = hw->priv;
2144         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2145         struct ieee80211_supported_band *sband;
2146         struct ieee80211_channel *chan;
2147         unsigned long flags;
2148         int pos;
2149
2150         spin_lock_irqsave(&common->cc_lock, flags);
2151         if (idx == 0)
2152                 ath_update_survey_stats(sc);
2153
2154         sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ];
2155         if (sband && idx >= sband->n_channels) {
2156                 idx -= sband->n_channels;
2157                 sband = NULL;
2158         }
2159
2160         if (!sband)
2161                 sband = hw->wiphy->bands[IEEE80211_BAND_5GHZ];
2162
2163         if (!sband || idx >= sband->n_channels) {
2164                 spin_unlock_irqrestore(&common->cc_lock, flags);
2165                 return -ENOENT;
2166         }
2167
2168         chan = &sband->channels[idx];
2169         pos = chan->hw_value;
2170         memcpy(survey, &sc->survey[pos], sizeof(*survey));
2171         survey->channel = chan;
2172         spin_unlock_irqrestore(&common->cc_lock, flags);
2173
2174         return 0;
2175 }
2176
2177 static void ath9k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
2178 {
2179         struct ath_softc *sc = hw->priv;
2180         struct ath_hw *ah = sc->sc_ah;
2181
2182         mutex_lock(&sc->mutex);
2183         ah->coverage_class = coverage_class;
2184
2185         ath9k_ps_wakeup(sc);
2186         ath9k_hw_init_global_settings(ah);
2187         ath9k_ps_restore(sc);
2188
2189         mutex_unlock(&sc->mutex);
2190 }
2191
2192 static void ath9k_flush(struct ieee80211_hw *hw, bool drop)
2193 {
2194         struct ath_softc *sc = hw->priv;
2195         struct ath_hw *ah = sc->sc_ah;
2196         struct ath_common *common = ath9k_hw_common(ah);
2197         int timeout = 200; /* ms */
2198         int i, j;
2199         bool drain_txq;
2200
2201         mutex_lock(&sc->mutex);
2202         cancel_delayed_work_sync(&sc->tx_complete_work);
2203
2204         if (ah->ah_flags & AH_UNPLUGGED) {
2205                 ath_dbg(common, ANY, "Device has been unplugged!\n");
2206                 mutex_unlock(&sc->mutex);
2207                 return;
2208         }
2209
2210         if (sc->sc_flags & SC_OP_INVALID) {
2211                 ath_dbg(common, ANY, "Device not present\n");
2212                 mutex_unlock(&sc->mutex);
2213                 return;
2214         }
2215
2216         for (j = 0; j < timeout; j++) {
2217                 bool npend = false;
2218
2219                 if (j)
2220                         usleep_range(1000, 2000);
2221
2222                 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
2223                         if (!ATH_TXQ_SETUP(sc, i))
2224                                 continue;
2225
2226                         npend = ath9k_has_pending_frames(sc, &sc->tx.txq[i]);
2227
2228                         if (npend)
2229                                 break;
2230                 }
2231
2232                 if (!npend)
2233                     break;
2234         }
2235
2236         if (drop) {
2237                 ath9k_ps_wakeup(sc);
2238                 spin_lock_bh(&sc->sc_pcu_lock);
2239                 drain_txq = ath_drain_all_txq(sc, false);
2240                 spin_unlock_bh(&sc->sc_pcu_lock);
2241
2242                 if (!drain_txq)
2243                         ath_reset(sc, false);
2244
2245                 ath9k_ps_restore(sc);
2246                 ieee80211_wake_queues(hw);
2247         }
2248
2249         ieee80211_queue_delayed_work(hw, &sc->tx_complete_work, 0);
2250         mutex_unlock(&sc->mutex);
2251 }
2252
2253 static bool ath9k_tx_frames_pending(struct ieee80211_hw *hw)
2254 {
2255         struct ath_softc *sc = hw->priv;
2256         int i;
2257
2258         for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
2259                 if (!ATH_TXQ_SETUP(sc, i))
2260                         continue;
2261
2262                 if (ath9k_has_pending_frames(sc, &sc->tx.txq[i]))
2263                         return true;
2264         }
2265         return false;
2266 }
2267
2268 static int ath9k_tx_last_beacon(struct ieee80211_hw *hw)
2269 {
2270         struct ath_softc *sc = hw->priv;
2271         struct ath_hw *ah = sc->sc_ah;
2272         struct ieee80211_vif *vif;
2273         struct ath_vif *avp;
2274         struct ath_buf *bf;
2275         struct ath_tx_status ts;
2276         bool edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA);
2277         int status;
2278
2279         vif = sc->beacon.bslot[0];
2280         if (!vif)
2281                 return 0;
2282
2283         avp = (void *)vif->drv_priv;
2284         if (!avp->is_bslot_active)
2285                 return 0;
2286
2287         if (!sc->beacon.tx_processed && !edma) {
2288                 tasklet_disable(&sc->bcon_tasklet);
2289
2290                 bf = avp->av_bcbuf;
2291                 if (!bf || !bf->bf_mpdu)
2292                         goto skip;
2293
2294                 status = ath9k_hw_txprocdesc(ah, bf->bf_desc, &ts);
2295                 if (status == -EINPROGRESS)
2296                         goto skip;
2297
2298                 sc->beacon.tx_processed = true;
2299                 sc->beacon.tx_last = !(ts.ts_status & ATH9K_TXERR_MASK);
2300
2301 skip:
2302                 tasklet_enable(&sc->bcon_tasklet);
2303         }
2304
2305         return sc->beacon.tx_last;
2306 }
2307
2308 static int ath9k_get_stats(struct ieee80211_hw *hw,
2309                            struct ieee80211_low_level_stats *stats)
2310 {
2311         struct ath_softc *sc = hw->priv;
2312         struct ath_hw *ah = sc->sc_ah;
2313         struct ath9k_mib_stats *mib_stats = &ah->ah_mibStats;
2314
2315         stats->dot11ACKFailureCount = mib_stats->ackrcv_bad;
2316         stats->dot11RTSFailureCount = mib_stats->rts_bad;
2317         stats->dot11FCSErrorCount = mib_stats->fcs_bad;
2318         stats->dot11RTSSuccessCount = mib_stats->rts_good;
2319         return 0;
2320 }
2321
2322 static u32 fill_chainmask(u32 cap, u32 new)
2323 {
2324         u32 filled = 0;
2325         int i;
2326
2327         for (i = 0; cap && new; i++, cap >>= 1) {
2328                 if (!(cap & BIT(0)))
2329                         continue;
2330
2331                 if (new & BIT(0))
2332                         filled |= BIT(i);
2333
2334                 new >>= 1;
2335         }
2336
2337         return filled;
2338 }
2339
2340 static int ath9k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
2341 {
2342         struct ath_softc *sc = hw->priv;
2343         struct ath_hw *ah = sc->sc_ah;
2344
2345         if (!rx_ant || !tx_ant)
2346                 return -EINVAL;
2347
2348         sc->ant_rx = rx_ant;
2349         sc->ant_tx = tx_ant;
2350
2351         if (ah->caps.rx_chainmask == 1)
2352                 return 0;
2353
2354         /* AR9100 runs into calibration issues if not all rx chains are enabled */
2355         if (AR_SREV_9100(ah))
2356                 ah->rxchainmask = 0x7;
2357         else
2358                 ah->rxchainmask = fill_chainmask(ah->caps.rx_chainmask, rx_ant);
2359
2360         ah->txchainmask = fill_chainmask(ah->caps.tx_chainmask, tx_ant);
2361         ath9k_reload_chainmask_settings(sc);
2362
2363         return 0;
2364 }
2365
2366 static int ath9k_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant)
2367 {
2368         struct ath_softc *sc = hw->priv;
2369
2370         *tx_ant = sc->ant_tx;
2371         *rx_ant = sc->ant_rx;
2372         return 0;
2373 }
2374
2375 struct ieee80211_ops ath9k_ops = {
2376         .tx                 = ath9k_tx,
2377         .start              = ath9k_start,
2378         .stop               = ath9k_stop,
2379         .add_interface      = ath9k_add_interface,
2380         .change_interface   = ath9k_change_interface,
2381         .remove_interface   = ath9k_remove_interface,
2382         .config             = ath9k_config,
2383         .configure_filter   = ath9k_configure_filter,
2384         .sta_add            = ath9k_sta_add,
2385         .sta_remove         = ath9k_sta_remove,
2386         .sta_notify         = ath9k_sta_notify,
2387         .conf_tx            = ath9k_conf_tx,
2388         .bss_info_changed   = ath9k_bss_info_changed,
2389         .set_key            = ath9k_set_key,
2390         .get_tsf            = ath9k_get_tsf,
2391         .set_tsf            = ath9k_set_tsf,
2392         .reset_tsf          = ath9k_reset_tsf,
2393         .ampdu_action       = ath9k_ampdu_action,
2394         .get_survey         = ath9k_get_survey,
2395         .rfkill_poll        = ath9k_rfkill_poll_state,
2396         .set_coverage_class = ath9k_set_coverage_class,
2397         .flush              = ath9k_flush,
2398         .tx_frames_pending  = ath9k_tx_frames_pending,
2399         .tx_last_beacon     = ath9k_tx_last_beacon,
2400         .get_stats          = ath9k_get_stats,
2401         .set_antenna        = ath9k_set_antenna,
2402         .get_antenna        = ath9k_get_antenna,
2403 };