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         bool reset;
 117
 118         spin_lock_irqsave(&sc->sc_pm_lock, flags);
 119         if (--sc->ps_usecount != 0)
 120                 goto unlock;
 121
 122         if (sc->ps_idle) {
 123                 ath9k_hw_setrxabort(sc->sc_ah, 1);
 124                 ath9k_hw_stopdmarecv(sc->sc_ah, &reset);
 125                 mode = ATH9K_PM_FULL_SLEEP;
 126         } else if (sc->ps_enabled &&
 127                    !(sc->ps_flags & (PS_WAIT_FOR_BEACON |
 128                                      PS_WAIT_FOR_CAB |
 129                                      PS_WAIT_FOR_PSPOLL_DATA |
 130                                      PS_WAIT_FOR_TX_ACK))) {
 131                 mode = ATH9K_PM_NETWORK_SLEEP;
 132         } else {
 133                 goto unlock;
 134         }
 135
 136         spin_lock(&common->cc_lock);
 137         ath_hw_cycle_counters_update(common);
 138         spin_unlock(&common->cc_lock);
 139
 140         ath9k_hw_setpower(sc->sc_ah, mode);
 141
 142  unlock:
 143         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 144 }
 145
 146 void ath_start_ani(struct ath_common *common)
 147 {
 148         struct ath_hw *ah = common->ah;
 149         unsigned long timestamp = jiffies_to_msecs(jiffies);
 150         struct ath_softc *sc = (struct ath_softc *) common->priv;
 151
 152         if (!(sc->sc_flags & SC_OP_ANI_RUN))
 153                 return;
 154
 155         if (sc->sc_flags & SC_OP_OFFCHANNEL)
 156                 return;
 157
 158         common->ani.longcal_timer = timestamp;
 159         common->ani.shortcal_timer = timestamp;
 160         common->ani.checkani_timer = timestamp;
 161
 162         mod_timer(&common->ani.timer,
 163                   jiffies +
 164                         msecs_to_jiffies((u32)ah->config.ani_poll_interval));
 165 }
 166
 167 static void ath_update_survey_nf(struct ath_softc *sc, int channel)
 168 {
 169         struct ath_hw *ah = sc->sc_ah;
 170         struct ath9k_channel *chan = &ah->channels[channel];
 171         struct survey_info *survey = &sc->survey[channel];
 172
 173         if (chan->noisefloor) {
 174                 survey->filled |= SURVEY_INFO_NOISE_DBM;
 175                 survey->noise = ath9k_hw_getchan_noise(ah, chan);
 176         }
 177 }
 178
 179 /*
 180  * Updates the survey statistics and returns the busy time since last
 181  * update in %, if the measurement duration was long enough for the
 182  * result to be useful, -1 otherwise.
 183  */
 184 static int ath_update_survey_stats(struct ath_softc *sc)
 185 {
 186         struct ath_hw *ah = sc->sc_ah;
 187         struct ath_common *common = ath9k_hw_common(ah);
 188         int pos = ah->curchan - &ah->channels[0];
 189         struct survey_info *survey = &sc->survey[pos];
 190         struct ath_cycle_counters *cc = &common->cc_survey;
 191         unsigned int div = common->clockrate * 1000;
 192         int ret = 0;
 193
 194         if (!ah->curchan)
 195                 return -1;
 196
 197         if (ah->power_mode == ATH9K_PM_AWAKE)
 198                 ath_hw_cycle_counters_update(common);
 199
 200         if (cc->cycles > 0) {
 201                 survey->filled |= SURVEY_INFO_CHANNEL_TIME |
 202                         SURVEY_INFO_CHANNEL_TIME_BUSY |
 203                         SURVEY_INFO_CHANNEL_TIME_RX |
 204                         SURVEY_INFO_CHANNEL_TIME_TX;
 205                 survey->channel_time += cc->cycles / div;
 206                 survey->channel_time_busy += cc->rx_busy / div;
 207                 survey->channel_time_rx += cc->rx_frame / div;
 208                 survey->channel_time_tx += cc->tx_frame / div;
 209         }
 210
 211         if (cc->cycles < div)
 212                 return -1;
 213
 214         if (cc->cycles > 0)
 215                 ret = cc->rx_busy * 100 / cc->cycles;
 216
 217         memset(cc, 0, sizeof(*cc));
 218
 219         ath_update_survey_nf(sc, pos);
 220
 221         return ret;
 222 }
 223
 224 static void __ath_cancel_work(struct ath_softc *sc)
 225 {
 226         cancel_work_sync(&sc->paprd_work);
 227         cancel_work_sync(&sc->hw_check_work);
 228         cancel_delayed_work_sync(&sc->tx_complete_work);
 229         cancel_delayed_work_sync(&sc->hw_pll_work);
 230 }
 231
 232 static void ath_cancel_work(struct ath_softc *sc)
 233 {
 234         __ath_cancel_work(sc);
 235         cancel_work_sync(&sc->hw_reset_work);
 236 }
 237
 238 static bool ath_prepare_reset(struct ath_softc *sc, bool retry_tx, bool flush)
 239 {
 240         struct ath_hw *ah = sc->sc_ah;
 241         struct ath_common *common = ath9k_hw_common(ah);
 242         bool ret = true;
 243
 244         ieee80211_stop_queues(sc->hw);
 245
 246         sc->hw_busy_count = 0;
 247         del_timer_sync(&common->ani.timer);
 248         del_timer_sync(&sc->rx_poll_timer);
 249
 250         ath9k_debug_samp_bb_mac(sc);
 251         ath9k_hw_disable_interrupts(ah);
 252
 253         if (!ath_stoprecv(sc))
 254                 ret = false;
 255
 256         if (!ath_drain_all_txq(sc, retry_tx))
 257                 ret = false;
 258
 259         if (!flush) {
 260                 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
 261                         ath_rx_tasklet(sc, 1, true);
 262                 ath_rx_tasklet(sc, 1, false);
 263         } else {
 264                 ath_flushrecv(sc);
 265         }
 266
 267         return ret;
 268 }
 269
 270 static bool ath_complete_reset(struct ath_softc *sc, bool start)
 271 {
 272         struct ath_hw *ah = sc->sc_ah;
 273         struct ath_common *common = ath9k_hw_common(ah);
 274
 275         if (ath_startrecv(sc) != 0) {
 276                 ath_err(common, "Unable to restart recv logic\n");
 277                 return false;
 278         }
 279
 280         ath9k_cmn_update_txpow(ah, sc->curtxpow,
 281                                sc->config.txpowlimit, &sc->curtxpow);
 282         ath9k_hw_set_interrupts(ah);
 283         ath9k_hw_enable_interrupts(ah);
 284
 285         if (!(sc->sc_flags & (SC_OP_OFFCHANNEL)) && start) {
 286                 if (sc->sc_flags & SC_OP_BEACONS)
 287                         ath_set_beacon(sc);
 288
 289                 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
 290                 ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/2);
 291                 ath_start_rx_poll(sc, 3);
 292                 if (!common->disable_ani)
 293                         ath_start_ani(common);
 294         }
 295
 296         if ((ah->caps.hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB) && sc->ant_rx != 3) {
 297                 struct ath_hw_antcomb_conf div_ant_conf;
 298                 u8 lna_conf;
 299
 300                 ath9k_hw_antdiv_comb_conf_get(ah, &div_ant_conf);
 301
 302                 if (sc->ant_rx == 1)
 303                         lna_conf = ATH_ANT_DIV_COMB_LNA1;
 304                 else
 305                         lna_conf = ATH_ANT_DIV_COMB_LNA2;
 306                 div_ant_conf.main_lna_conf = lna_conf;
 307                 div_ant_conf.alt_lna_conf = lna_conf;
 308
 309                 ath9k_hw_antdiv_comb_conf_set(ah, &div_ant_conf);
 310         }
 311
 312         ieee80211_wake_queues(sc->hw);
 313
 314         return true;
 315 }
 316
 317 static int ath_reset_internal(struct ath_softc *sc, struct ath9k_channel *hchan,
 318                               bool retry_tx)
 319 {
 320         struct ath_hw *ah = sc->sc_ah;
 321         struct ath_common *common = ath9k_hw_common(ah);
 322         struct ath9k_hw_cal_data *caldata = NULL;
 323         bool fastcc = true;
 324         bool flush = false;
 325         int r;
 326
 327         __ath_cancel_work(sc);
 328
 329         spin_lock_bh(&sc->sc_pcu_lock);
 330
 331         if (!(sc->sc_flags & SC_OP_OFFCHANNEL)) {
 332                 fastcc = false;
 333                 caldata = &sc->caldata;
 334         }
 335
 336         if (!hchan) {
 337                 fastcc = false;
 338                 flush = true;
 339                 hchan = ah->curchan;
 340         }
 341
 342         if (!ath_prepare_reset(sc, retry_tx, flush))
 343                 fastcc = false;
 344
 345         ath_dbg(common, CONFIG, "Reset to %u MHz, HT40: %d fastcc: %d\n",
 346                 hchan->channel, IS_CHAN_HT40(hchan), fastcc);
 347
 348         r = ath9k_hw_reset(ah, hchan, caldata, fastcc);
 349         if (r) {
 350                 ath_err(common,
 351                         "Unable to reset channel, reset status %d\n", r);
 352                 goto out;
 353         }
 354
 355         if (!ath_complete_reset(sc, true))
 356                 r = -EIO;
 357
 358 out:
 359         spin_unlock_bh(&sc->sc_pcu_lock);
 360         return r;
 361 }
 362
 363
 364 /*
 365  * Set/change channels.  If the channel is really being changed, it's done
 366  * by reseting the chip.  To accomplish this we must first cleanup any pending
 367  * DMA, then restart stuff.
 368 */
 369 static int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
 370                     struct ath9k_channel *hchan)
 371 {
 372         int r;
 373
 374         if (sc->sc_flags & SC_OP_INVALID)
 375                 return -EIO;
 376
 377         r = ath_reset_internal(sc, hchan, false);
 378
 379         return r;
 380 }
 381
 382 static void ath_paprd_activate(struct ath_softc *sc)
 383 {
 384         struct ath_hw *ah = sc->sc_ah;
 385         struct ath9k_hw_cal_data *caldata = ah->caldata;
 386         int chain;
 387
 388         if (!caldata || !caldata->paprd_done)
 389                 return;
 390
 391         ath9k_ps_wakeup(sc);
 392         ar9003_paprd_enable(ah, false);
 393         for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
 394                 if (!(ah->txchainmask & BIT(chain)))
 395                         continue;
 396
 397                 ar9003_paprd_populate_single_table(ah, caldata, chain);
 398         }
 399
 400         ar9003_paprd_enable(ah, true);
 401         ath9k_ps_restore(sc);
 402 }
 403
 404 static bool ath_paprd_send_frame(struct ath_softc *sc, struct sk_buff *skb, int chain)
 405 {
 406         struct ieee80211_hw *hw = sc->hw;
 407         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
 408         struct ath_hw *ah = sc->sc_ah;
 409         struct ath_common *common = ath9k_hw_common(ah);
 410         struct ath_tx_control txctl;
 411         int time_left;
 412
 413         memset(&txctl, 0, sizeof(txctl));
 414         txctl.txq = sc->tx.txq_map[WME_AC_BE];
 415
 416         memset(tx_info, 0, sizeof(*tx_info));
 417         tx_info->band = hw->conf.channel->band;
 418         tx_info->flags |= IEEE80211_TX_CTL_NO_ACK;
 419         tx_info->control.rates[0].idx = 0;
 420         tx_info->control.rates[0].count = 1;
 421         tx_info->control.rates[0].flags = IEEE80211_TX_RC_MCS;
 422         tx_info->control.rates[1].idx = -1;
 423
 424         init_completion(&sc->paprd_complete);
 425         txctl.paprd = BIT(chain);
 426
 427         if (ath_tx_start(hw, skb, &txctl) != 0) {
 428                 ath_dbg(common, CALIBRATE, "PAPRD TX failed\n");
 429                 dev_kfree_skb_any(skb);
 430                 return false;
 431         }
 432
 433         time_left = wait_for_completion_timeout(&sc->paprd_complete,
 434                         msecs_to_jiffies(ATH_PAPRD_TIMEOUT));
 435
 436         if (!time_left)
 437                 ath_dbg(common, CALIBRATE,
 438                         "Timeout waiting for paprd training on TX chain %d\n",
 439                         chain);
 440
 441         return !!time_left;
 442 }
 443
 444 void ath_paprd_calibrate(struct work_struct *work)
 445 {
 446         struct ath_softc *sc = container_of(work, struct ath_softc, paprd_work);
 447         struct ieee80211_hw *hw = sc->hw;
 448         struct ath_hw *ah = sc->sc_ah;
 449         struct ieee80211_hdr *hdr;
 450         struct sk_buff *skb = NULL;
 451         struct ath9k_hw_cal_data *caldata = ah->caldata;
 452         struct ath_common *common = ath9k_hw_common(ah);
 453         int ftype;
 454         int chain_ok = 0;
 455         int chain;
 456         int len = 1800;
 457
 458         if (!caldata)
 459                 return;
 460
 461         ath9k_ps_wakeup(sc);
 462
 463         if (ar9003_paprd_init_table(ah) < 0)
 464                 goto fail_paprd;
 465
 466         skb = alloc_skb(len, GFP_KERNEL);
 467         if (!skb)
 468                 goto fail_paprd;
 469
 470         skb_put(skb, len);
 471         memset(skb->data, 0, len);
 472         hdr = (struct ieee80211_hdr *)skb->data;
 473         ftype = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC;
 474         hdr->frame_control = cpu_to_le16(ftype);
 475         hdr->duration_id = cpu_to_le16(10);
 476         memcpy(hdr->addr1, hw->wiphy->perm_addr, ETH_ALEN);
 477         memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN);
 478         memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN);
 479
 480         for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
 481                 if (!(ah->txchainmask & BIT(chain)))
 482                         continue;
 483
 484                 chain_ok = 0;
 485
 486                 ath_dbg(common, CALIBRATE,
 487                         "Sending PAPRD frame for thermal measurement on chain %d\n",
 488                         chain);
 489                 if (!ath_paprd_send_frame(sc, skb, chain))
 490                         goto fail_paprd;
 491
 492                 ar9003_paprd_setup_gain_table(ah, chain);
 493
 494                 ath_dbg(common, CALIBRATE,
 495                         "Sending PAPRD training frame on chain %d\n", chain);
 496                 if (!ath_paprd_send_frame(sc, skb, chain))
 497                         goto fail_paprd;
 498
 499                 if (!ar9003_paprd_is_done(ah)) {
 500                         ath_dbg(common, CALIBRATE,
 501                                 "PAPRD not yet done on chain %d\n", chain);
 502                         break;
 503                 }
 504
 505                 if (ar9003_paprd_create_curve(ah, caldata, chain)) {
 506                         ath_dbg(common, CALIBRATE,
 507                                 "PAPRD create curve failed on chain %d\n",
 508                                                                    chain);
 509                         break;
 510                 }
 511
 512                 chain_ok = 1;
 513         }
 514         kfree_skb(skb);
 515
 516         if (chain_ok) {
 517                 caldata->paprd_done = true;
 518                 ath_paprd_activate(sc);
 519         }
 520
 521 fail_paprd:
 522         ath9k_ps_restore(sc);
 523 }
 524
 525 /*
 526  *  This routine performs the periodic noise floor calibration function
 527  *  that is used to adjust and optimize the chip performance.  This
 528  *  takes environmental changes (location, temperature) into account.
 529  *  When the task is complete, it reschedules itself depending on the
 530  *  appropriate interval that was calculated.
 531  */
 532 void ath_ani_calibrate(unsigned long data)
 533 {
 534         struct ath_softc *sc = (struct ath_softc *)data;
 535         struct ath_hw *ah = sc->sc_ah;
 536         struct ath_common *common = ath9k_hw_common(ah);
 537         bool longcal = false;
 538         bool shortcal = false;
 539         bool aniflag = false;
 540         unsigned int timestamp = jiffies_to_msecs(jiffies);
 541         u32 cal_interval, short_cal_interval, long_cal_interval;
 542         unsigned long flags;
 543
 544         if (ah->caldata && ah->caldata->nfcal_interference)
 545                 long_cal_interval = ATH_LONG_CALINTERVAL_INT;
 546         else
 547                 long_cal_interval = ATH_LONG_CALINTERVAL;
 548
 549         short_cal_interval = (ah->opmode == NL80211_IFTYPE_AP) ?
 550                 ATH_AP_SHORT_CALINTERVAL : ATH_STA_SHORT_CALINTERVAL;
 551
 552         /* Only calibrate if awake */
 553         if (sc->sc_ah->power_mode != ATH9K_PM_AWAKE)
 554                 goto set_timer;
 555
 556         ath9k_ps_wakeup(sc);
 557
 558         /* Long calibration runs independently of short calibration. */
 559         if ((timestamp - common->ani.longcal_timer) >= long_cal_interval) {
 560                 longcal = true;
 561                 common->ani.longcal_timer = timestamp;
 562         }
 563
 564         /* Short calibration applies only while caldone is false */
 565         if (!common->ani.caldone) {
 566                 if ((timestamp - common->ani.shortcal_timer) >= short_cal_interval) {
 567                         shortcal = true;
 568                         common->ani.shortcal_timer = timestamp;
 569                         common->ani.resetcal_timer = timestamp;
 570                 }
 571         } else {
 572                 if ((timestamp - common->ani.resetcal_timer) >=
 573                     ATH_RESTART_CALINTERVAL) {
 574                         common->ani.caldone = ath9k_hw_reset_calvalid(ah);
 575                         if (common->ani.caldone)
 576                                 common->ani.resetcal_timer = timestamp;
 577                 }
 578         }
 579
 580         /* Verify whether we must check ANI */
 581         if (sc->sc_ah->config.enable_ani
 582             && (timestamp - common->ani.checkani_timer) >=
 583             ah->config.ani_poll_interval) {
 584                 aniflag = true;
 585                 common->ani.checkani_timer = timestamp;
 586         }
 587
 588         /* Call ANI routine if necessary */
 589         if (aniflag) {
 590                 spin_lock_irqsave(&common->cc_lock, flags);
 591                 ath9k_hw_ani_monitor(ah, ah->curchan);
 592                 ath_update_survey_stats(sc);
 593                 spin_unlock_irqrestore(&common->cc_lock, flags);
 594         }
 595
 596         /* Perform calibration if necessary */
 597         if (longcal || shortcal) {
 598                 common->ani.caldone =
 599                         ath9k_hw_calibrate(ah, ah->curchan,
 600                                                 ah->rxchainmask, longcal);
 601         }
 602
 603         ath_dbg(common, ANI,
 604                 "Calibration @%lu finished: %s %s %s, caldone: %s\n",
 605                 jiffies,
 606                 longcal ? "long" : "", shortcal ? "short" : "",
 607                 aniflag ? "ani" : "", common->ani.caldone ? "true" : "false");
 608
 609         ath9k_ps_restore(sc);
 610
 611 set_timer:
 612         /*
 613         * Set timer interval based on previous results.
 614         * The interval must be the shortest necessary to satisfy ANI,
 615         * short calibration and long calibration.
 616         */
 617         ath9k_debug_samp_bb_mac(sc);
 618         cal_interval = ATH_LONG_CALINTERVAL;
 619         if (sc->sc_ah->config.enable_ani)
 620                 cal_interval = min(cal_interval,
 621                                    (u32)ah->config.ani_poll_interval);
 622         if (!common->ani.caldone)
 623                 cal_interval = min(cal_interval, (u32)short_cal_interval);
 624
 625         mod_timer(&common->ani.timer, jiffies + msecs_to_jiffies(cal_interval));
 626         if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_PAPRD) && ah->caldata) {
 627                 if (!ah->caldata->paprd_done)
 628                         ieee80211_queue_work(sc->hw, &sc->paprd_work);
 629                 else if (!ah->paprd_table_write_done)
 630                         ath_paprd_activate(sc);
 631         }
 632 }
 633
 634 static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta,
 635                             struct ieee80211_vif *vif)
 636 {
 637         struct ath_node *an;
 638         an = (struct ath_node *)sta->drv_priv;
 639
 640 #ifdef CONFIG_ATH9K_DEBUGFS
 641         spin_lock(&sc->nodes_lock);
 642         list_add(&an->list, &sc->nodes);
 643         spin_unlock(&sc->nodes_lock);
 644 #endif
 645         an->sta = sta;
 646         an->vif = vif;
 647
 648         if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT) {
 649                 ath_tx_node_init(sc, an);
 650                 an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR +
 651                                      sta->ht_cap.ampdu_factor);
 652                 an->mpdudensity = parse_mpdudensity(sta->ht_cap.ampdu_density);
 653         }
 654 }
 655
 656 static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
 657 {
 658         struct ath_node *an = (struct ath_node *)sta->drv_priv;
 659
 660 #ifdef CONFIG_ATH9K_DEBUGFS
 661         spin_lock(&sc->nodes_lock);
 662         list_del(&an->list);
 663         spin_unlock(&sc->nodes_lock);
 664         an->sta = NULL;
 665 #endif
 666
 667         if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT)
 668                 ath_tx_node_cleanup(sc, an);
 669 }
 670
 671
 672 void ath9k_tasklet(unsigned long data)
 673 {
 674         struct ath_softc *sc = (struct ath_softc *)data;
 675         struct ath_hw *ah = sc->sc_ah;
 676         struct ath_common *common = ath9k_hw_common(ah);
 677
 678         u32 status = sc->intrstatus;
 679         u32 rxmask;
 680
 681         ath9k_ps_wakeup(sc);
 682         spin_lock(&sc->sc_pcu_lock);
 683
 684         if ((status & ATH9K_INT_FATAL) ||
 685             (status & ATH9K_INT_BB_WATCHDOG)) {
 686 #ifdef CONFIG_ATH9K_DEBUGFS
 687                 enum ath_reset_type type;
 688
 689                 if (status & ATH9K_INT_FATAL)
 690                         type = RESET_TYPE_FATAL_INT;
 691                 else
 692                         type = RESET_TYPE_BB_WATCHDOG;
 693
 694                 RESET_STAT_INC(sc, type);
 695 #endif
 696                 ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
 697                 goto out;
 698         }
 699
 700         if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) {
 701                 /*
 702                  * TSF sync does not look correct; remain awake to sync with
 703                  * the next Beacon.
 704                  */
 705                 ath_dbg(common, PS, "TSFOOR - Sync with next Beacon\n");
 706                 sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC;
 707         }
 708
 709         if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
 710                 rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL |
 711                           ATH9K_INT_RXORN);
 712         else
 713                 rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
 714
 715         if (status & rxmask) {
 716                 /* Check for high priority Rx first */
 717                 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
 718                     (status & ATH9K_INT_RXHP))
 719                         ath_rx_tasklet(sc, 0, true);
 720
 721                 ath_rx_tasklet(sc, 0, false);
 722         }
 723
 724         if (status & ATH9K_INT_TX) {
 725                 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
 726                         ath_tx_edma_tasklet(sc);
 727                 else
 728                         ath_tx_tasklet(sc);
 729         }
 730
 731         ath9k_btcoex_handle_interrupt(sc, status);
 732
 733 out:
 734         /* re-enable hardware interrupt */
 735         ath9k_hw_enable_interrupts(ah);
 736
 737         spin_unlock(&sc->sc_pcu_lock);
 738         ath9k_ps_restore(sc);
 739 }
 740
 741 irqreturn_t ath_isr(int irq, void *dev)
 742 {
 743 #define SCHED_INTR (                            \
 744                 ATH9K_INT_FATAL |               \
 745                 ATH9K_INT_BB_WATCHDOG |         \
 746                 ATH9K_INT_RXORN |               \
 747                 ATH9K_INT_RXEOL |               \
 748                 ATH9K_INT_RX |                  \
 749                 ATH9K_INT_RXLP |                \
 750                 ATH9K_INT_RXHP |                \
 751                 ATH9K_INT_TX |                  \
 752                 ATH9K_INT_BMISS |               \
 753                 ATH9K_INT_CST |                 \
 754                 ATH9K_INT_TSFOOR |              \
 755                 ATH9K_INT_GENTIMER |            \
 756                 ATH9K_INT_MCI)
 757
 758         struct ath_softc *sc = dev;
 759         struct ath_hw *ah = sc->sc_ah;
 760         struct ath_common *common = ath9k_hw_common(ah);
 761         enum ath9k_int status;
 762         bool sched = false;
 763
 764         /*
 765          * The hardware is not ready/present, don't
 766          * touch anything. Note this can happen early
 767          * on if the IRQ is shared.
 768          */
 769         if (sc->sc_flags & SC_OP_INVALID)
 770                 return IRQ_NONE;
 771
 772
 773         /* shared irq, not for us */
 774
 775         if (!ath9k_hw_intrpend(ah))
 776                 return IRQ_NONE;
 777
 778         /*
 779          * Figure out the reason(s) for the interrupt.  Note
 780          * that the hal returns a pseudo-ISR that may include
 781          * bits we haven't explicitly enabled so we mask the
 782          * value to insure we only process bits we requested.
 783          */
 784         ath9k_hw_getisr(ah, &status);   /* NB: clears ISR too */
 785         status &= ah->imask;    /* discard unasked-for bits */
 786
 787         /*
 788          * If there are no status bits set, then this interrupt was not
 789          * for me (should have been caught above).
 790          */
 791         if (!status)
 792                 return IRQ_NONE;
 793
 794         /* Cache the status */
 795         sc->intrstatus = status;
 796
 797         if (status & SCHED_INTR)
 798                 sched = true;
 799
 800         /*
 801          * If a FATAL or RXORN interrupt is received, we have to reset the
 802          * chip immediately.
 803          */
 804         if ((status & ATH9K_INT_FATAL) || ((status & ATH9K_INT_RXORN) &&
 805             !(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)))
 806                 goto chip_reset;
 807
 808         if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
 809             (status & ATH9K_INT_BB_WATCHDOG)) {
 810
 811                 spin_lock(&common->cc_lock);
 812                 ath_hw_cycle_counters_update(common);
 813                 ar9003_hw_bb_watchdog_dbg_info(ah);
 814                 spin_unlock(&common->cc_lock);
 815
 816                 goto chip_reset;
 817         }
 818
 819         if (status & ATH9K_INT_SWBA)
 820                 tasklet_schedule(&sc->bcon_tasklet);
 821
 822         if (status & ATH9K_INT_TXURN)
 823                 ath9k_hw_updatetxtriglevel(ah, true);
 824
 825         if (status & ATH9K_INT_RXEOL) {
 826                 ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
 827                 ath9k_hw_set_interrupts(ah);
 828         }
 829
 830         if (status & ATH9K_INT_MIB) {
 831                 /*
 832                  * Disable interrupts until we service the MIB
 833                  * interrupt; otherwise it will continue to
 834                  * fire.
 835                  */
 836                 ath9k_hw_disable_interrupts(ah);
 837                 /*
 838                  * Let the hal handle the event. We assume
 839                  * it will clear whatever condition caused
 840                  * the interrupt.
 841                  */
 842                 spin_lock(&common->cc_lock);
 843                 ath9k_hw_proc_mib_event(ah);
 844                 spin_unlock(&common->cc_lock);
 845                 ath9k_hw_enable_interrupts(ah);
 846         }
 847
 848         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
 849                 if (status & ATH9K_INT_TIM_TIMER) {
 850                         if (ATH_DBG_WARN_ON_ONCE(sc->ps_idle))
 851                                 goto chip_reset;
 852                         /* Clear RxAbort bit so that we can
 853                          * receive frames */
 854                         ath9k_setpower(sc, ATH9K_PM_AWAKE);
 855                         ath9k_hw_setrxabort(sc->sc_ah, 0);
 856                         sc->ps_flags |= PS_WAIT_FOR_BEACON;
 857                 }
 858
 859 chip_reset:
 860
 861         ath_debug_stat_interrupt(sc, status);
 862
 863         if (sched) {
 864                 /* turn off every interrupt */
 865                 ath9k_hw_disable_interrupts(ah);
 866                 tasklet_schedule(&sc->intr_tq);
 867         }
 868
 869         return IRQ_HANDLED;
 870
 871 #undef SCHED_INTR
 872 }
 873
 874 static int ath_reset(struct ath_softc *sc, bool retry_tx)
 875 {
 876         int r;
 877
 878         ath9k_ps_wakeup(sc);
 879
 880         r = ath_reset_internal(sc, NULL, retry_tx);
 881
 882         if (retry_tx) {
 883                 int i;
 884                 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
 885                         if (ATH_TXQ_SETUP(sc, i)) {
 886                                 spin_lock_bh(&sc->tx.txq[i].axq_lock);
 887                                 ath_txq_schedule(sc, &sc->tx.txq[i]);
 888                                 spin_unlock_bh(&sc->tx.txq[i].axq_lock);
 889                         }
 890                 }
 891         }
 892
 893         ath9k_ps_restore(sc);
 894
 895         return r;
 896 }
 897
 898 void ath_reset_work(struct work_struct *work)
 899 {
 900         struct ath_softc *sc = container_of(work, struct ath_softc, hw_reset_work);
 901
 902         ath_reset(sc, true);
 903 }
 904
 905 void ath_hw_check(struct work_struct *work)
 906 {
 907         struct ath_softc *sc = container_of(work, struct ath_softc, hw_check_work);
 908         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 909         unsigned long flags;
 910         int busy;
 911         u8 is_alive, nbeacon = 1;
 912
 913         ath9k_ps_wakeup(sc);
 914         is_alive = ath9k_hw_check_alive(sc->sc_ah);
 915
 916         if (is_alive && !AR_SREV_9300(sc->sc_ah))
 917                 goto out;
 918         else if (!is_alive && AR_SREV_9300(sc->sc_ah)) {
 919                 ath_dbg(common, RESET,
 920                         "DCU stuck is detected. Schedule chip reset\n");
 921                 RESET_STAT_INC(sc, RESET_TYPE_MAC_HANG);
 922                 goto sched_reset;
 923         }
 924
 925         spin_lock_irqsave(&common->cc_lock, flags);
 926         busy = ath_update_survey_stats(sc);
 927         spin_unlock_irqrestore(&common->cc_lock, flags);
 928
 929         ath_dbg(common, RESET, "Possible baseband hang, busy=%d (try %d)\n",
 930                 busy, sc->hw_busy_count + 1);
 931         if (busy >= 99) {
 932                 if (++sc->hw_busy_count >= 3) {
 933                         RESET_STAT_INC(sc, RESET_TYPE_BB_HANG);
 934                         goto sched_reset;
 935                 }
 936         } else if (busy >= 0) {
 937                 sc->hw_busy_count = 0;
 938                 nbeacon = 3;
 939         }
 940
 941         ath_start_rx_poll(sc, nbeacon);
 942         goto out;
 943
 944 sched_reset:
 945         ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
 946 out:
 947         ath9k_ps_restore(sc);
 948 }
 949
 950 static void ath_hw_pll_rx_hang_check(struct ath_softc *sc, u32 pll_sqsum)
 951 {
 952         static int count;
 953         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 954
 955         if (pll_sqsum >= 0x40000) {
 956                 count++;
 957                 if (count == 3) {
 958                         /* Rx is hung for more than 500ms. Reset it */
 959                         ath_dbg(common, RESET, "Possible RX hang, resetting\n");
 960                         RESET_STAT_INC(sc, RESET_TYPE_PLL_HANG);
 961                         ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
 962                         count = 0;
 963                 }
 964         } else
 965                 count = 0;
 966 }
 967
 968 void ath_hw_pll_work(struct work_struct *work)
 969 {
 970         struct ath_softc *sc = container_of(work, struct ath_softc,
 971                                             hw_pll_work.work);
 972         u32 pll_sqsum;
 973
 974         if (AR_SREV_9485(sc->sc_ah)) {
 975
 976                 ath9k_ps_wakeup(sc);
 977                 pll_sqsum = ar9003_get_pll_sqsum_dvc(sc->sc_ah);
 978                 ath9k_ps_restore(sc);
 979
 980                 ath_hw_pll_rx_hang_check(sc, pll_sqsum);
 981
 982                 ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/5);
 983         }
 984 }
 985
 986 /**********************/
 987 /* mac80211 callbacks */
 988 /**********************/
 989
 990 static int ath9k_start(struct ieee80211_hw *hw)
 991 {
 992         struct ath_softc *sc = hw->priv;
 993         struct ath_hw *ah = sc->sc_ah;
 994         struct ath_common *common = ath9k_hw_common(ah);
 995         struct ieee80211_channel *curchan = hw->conf.channel;
 996         struct ath9k_channel *init_channel;
 997         int r;
 998
 999         ath_dbg(common, CONFIG,
1000                 "Starting driver with initial channel: %d MHz\n",
1001                 curchan->center_freq);
1002
1003         ath9k_ps_wakeup(sc);
1004         mutex_lock(&sc->mutex);
1005
1006         init_channel = ath9k_cmn_get_curchannel(hw, ah);
1007
1008         /* Reset SERDES registers */
1009         ath9k_hw_configpcipowersave(ah, false);
1010
1011         /*
1012          * The basic interface to setting the hardware in a good
1013          * state is ``reset''.  On return the hardware is known to
1014          * be powered up and with interrupts disabled.  This must
1015          * be followed by initialization of the appropriate bits
1016          * and then setup of the interrupt mask.
1017          */
1018         spin_lock_bh(&sc->sc_pcu_lock);
1019
1020         atomic_set(&ah->intr_ref_cnt, -1);
1021
1022         r = ath9k_hw_reset(ah, init_channel, ah->caldata, false);
1023         if (r) {
1024                 ath_err(common,
1025                         "Unable to reset hardware; reset status %d (freq %u MHz)\n",
1026                         r, curchan->center_freq);
1027                 spin_unlock_bh(&sc->sc_pcu_lock);
1028                 goto mutex_unlock;
1029         }
1030
1031         /* Setup our intr mask. */
1032         ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL |
1033                     ATH9K_INT_RXORN | ATH9K_INT_FATAL |
1034                     ATH9K_INT_GLOBAL;
1035
1036         if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
1037                 ah->imask |= ATH9K_INT_RXHP |
1038                              ATH9K_INT_RXLP |
1039                              ATH9K_INT_BB_WATCHDOG;
1040         else
1041                 ah->imask |= ATH9K_INT_RX;
1042
1043         ah->imask |= ATH9K_INT_GTT;
1044
1045         if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
1046                 ah->imask |= ATH9K_INT_CST;
1047
1048         if (ah->caps.hw_caps & ATH9K_HW_CAP_MCI)
1049                 ah->imask |= ATH9K_INT_MCI;
1050
1051         sc->sc_flags &= ~SC_OP_INVALID;
1052         sc->sc_ah->is_monitoring = false;
1053
1054         if (!ath_complete_reset(sc, false)) {
1055                 r = -EIO;
1056                 spin_unlock_bh(&sc->sc_pcu_lock);
1057                 goto mutex_unlock;
1058         }
1059
1060         if (ah->led_pin >= 0) {
1061                 ath9k_hw_cfg_output(ah, ah->led_pin,
1062                                     AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
1063                 ath9k_hw_set_gpio(ah, ah->led_pin, 0);
1064         }
1065
1066         /*
1067          * Reset key cache to sane defaults (all entries cleared) instead of
1068          * semi-random values after suspend/resume.
1069          */
1070         ath9k_cmn_init_crypto(sc->sc_ah);
1071
1072         spin_unlock_bh(&sc->sc_pcu_lock);
1073
1074         ath9k_start_btcoex(sc);
1075
1076         if (ah->caps.pcie_lcr_extsync_en && common->bus_ops->extn_synch_en)
1077                 common->bus_ops->extn_synch_en(common);
1078
1079 mutex_unlock:
1080         mutex_unlock(&sc->mutex);
1081
1082         ath9k_ps_restore(sc);
1083
1084         return r;
1085 }
1086
1087 static void ath9k_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
1088 {
1089         struct ath_softc *sc = hw->priv;
1090         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1091         struct ath_tx_control txctl;
1092         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1093
1094         if (sc->ps_enabled) {
1095                 /*
1096                  * mac80211 does not set PM field for normal data frames, so we
1097                  * need to update that based on the current PS mode.
1098                  */
1099                 if (ieee80211_is_data(hdr->frame_control) &&
1100                     !ieee80211_is_nullfunc(hdr->frame_control) &&
1101                     !ieee80211_has_pm(hdr->frame_control)) {
1102                         ath_dbg(common, PS,
1103                                 "Add PM=1 for a TX frame while in PS mode\n");
1104                         hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1105                 }
1106         }
1107
1108         if (unlikely(sc->sc_ah->power_mode == ATH9K_PM_NETWORK_SLEEP)) {
1109                 /*
1110                  * We are using PS-Poll and mac80211 can request TX while in
1111                  * power save mode. Need to wake up hardware for the TX to be
1112                  * completed and if needed, also for RX of buffered frames.
1113                  */
1114                 ath9k_ps_wakeup(sc);
1115                 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
1116                         ath9k_hw_setrxabort(sc->sc_ah, 0);
1117                 if (ieee80211_is_pspoll(hdr->frame_control)) {
1118                         ath_dbg(common, PS,
1119                                 "Sending PS-Poll to pick a buffered frame\n");
1120                         sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA;
1121                 } else {
1122                         ath_dbg(common, PS, "Wake up to complete TX\n");
1123                         sc->ps_flags |= PS_WAIT_FOR_TX_ACK;
1124                 }
1125                 /*
1126                  * The actual restore operation will happen only after
1127                  * the ps_flags bit is cleared. We are just dropping
1128                  * the ps_usecount here.
1129                  */
1130                 ath9k_ps_restore(sc);
1131         }
1132
1133         /*
1134          * Cannot tx while the hardware is in full sleep, it first needs a full
1135          * chip reset to recover from that
1136          */
1137         if (unlikely(sc->sc_ah->power_mode == ATH9K_PM_FULL_SLEEP)) {
1138                 ath_err(common, "TX while HW is in FULL_SLEEP mode\n");
1139                 goto exit;
1140         }
1141
1142         memset(&txctl, 0, sizeof(struct ath_tx_control));
1143         txctl.txq = sc->tx.txq_map[skb_get_queue_mapping(skb)];
1144
1145         ath_dbg(common, XMIT, "transmitting packet, skb: %p\n", skb);
1146
1147         if (ath_tx_start(hw, skb, &txctl) != 0) {
1148                 ath_dbg(common, XMIT, "TX failed\n");
1149                 TX_STAT_INC(txctl.txq->axq_qnum, txfailed);
1150                 goto exit;
1151         }
1152
1153         return;
1154 exit:
1155         dev_kfree_skb_any(skb);
1156 }
1157
1158 static void ath9k_stop(struct ieee80211_hw *hw)
1159 {
1160         struct ath_softc *sc = hw->priv;
1161         struct ath_hw *ah = sc->sc_ah;
1162         struct ath_common *common = ath9k_hw_common(ah);
1163         bool prev_idle;
1164
1165         mutex_lock(&sc->mutex);
1166
1167         ath_cancel_work(sc);
1168         del_timer_sync(&sc->rx_poll_timer);
1169
1170         if (sc->sc_flags & SC_OP_INVALID) {
1171                 ath_dbg(common, ANY, "Device not present\n");
1172                 mutex_unlock(&sc->mutex);
1173                 return;
1174         }
1175
1176         /* Ensure HW is awake when we try to shut it down. */
1177         ath9k_ps_wakeup(sc);
1178
1179         ath9k_stop_btcoex(sc);
1180
1181         spin_lock_bh(&sc->sc_pcu_lock);
1182
1183         /* prevent tasklets to enable interrupts once we disable them */
1184         ah->imask &= ~ATH9K_INT_GLOBAL;
1185
1186         /* make sure h/w will not generate any interrupt
1187          * before setting the invalid flag. */
1188         ath9k_hw_disable_interrupts(ah);
1189
1190         spin_unlock_bh(&sc->sc_pcu_lock);
1191
1192         /* we can now sync irq and kill any running tasklets, since we already
1193          * disabled interrupts and not holding a spin lock */
1194         synchronize_irq(sc->irq);
1195         tasklet_kill(&sc->intr_tq);
1196         tasklet_kill(&sc->bcon_tasklet);
1197
1198         prev_idle = sc->ps_idle;
1199         sc->ps_idle = true;
1200
1201         spin_lock_bh(&sc->sc_pcu_lock);
1202
1203         if (ah->led_pin >= 0) {
1204                 ath9k_hw_set_gpio(ah, ah->led_pin, 1);
1205                 ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
1206         }
1207
1208         ath_prepare_reset(sc, false, true);
1209
1210         if (sc->rx.frag) {
1211                 dev_kfree_skb_any(sc->rx.frag);
1212                 sc->rx.frag = NULL;
1213         }
1214
1215         if (!ah->curchan)
1216                 ah->curchan = ath9k_cmn_get_curchannel(hw, ah);
1217
1218         ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
1219         ath9k_hw_phy_disable(ah);
1220
1221         ath9k_hw_configpcipowersave(ah, true);
1222
1223         spin_unlock_bh(&sc->sc_pcu_lock);
1224
1225         ath9k_ps_restore(sc);
1226
1227         sc->sc_flags |= SC_OP_INVALID;
1228         sc->ps_idle = prev_idle;
1229
1230         mutex_unlock(&sc->mutex);
1231
1232         ath_dbg(common, CONFIG, "Driver halt\n");
1233 }
1234
1235 bool ath9k_uses_beacons(int type)
1236 {
1237         switch (type) {
1238         case NL80211_IFTYPE_AP:
1239         case NL80211_IFTYPE_ADHOC:
1240         case NL80211_IFTYPE_MESH_POINT:
1241                 return true;
1242         default:
1243                 return false;
1244         }
1245 }
1246
1247 static void ath9k_reclaim_beacon(struct ath_softc *sc,
1248                                  struct ieee80211_vif *vif)
1249 {
1250         struct ath_vif *avp = (void *)vif->drv_priv;
1251
1252         ath9k_set_beaconing_status(sc, false);
1253         ath_beacon_return(sc, avp);
1254         ath9k_set_beaconing_status(sc, true);
1255 }
1256
1257 static void ath9k_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1258 {
1259         struct ath9k_vif_iter_data *iter_data = data;
1260         int i;
1261
1262         if (iter_data->hw_macaddr)
1263                 for (i = 0; i < ETH_ALEN; i++)
1264                         iter_data->mask[i] &=
1265                                 ~(iter_data->hw_macaddr[i] ^ mac[i]);
1266
1267         switch (vif->type) {
1268         case NL80211_IFTYPE_AP:
1269                 iter_data->naps++;
1270                 break;
1271         case NL80211_IFTYPE_STATION:
1272                 iter_data->nstations++;
1273                 break;
1274         case NL80211_IFTYPE_ADHOC:
1275                 iter_data->nadhocs++;
1276                 break;
1277         case NL80211_IFTYPE_MESH_POINT:
1278                 iter_data->nmeshes++;
1279                 break;
1280         case NL80211_IFTYPE_WDS:
1281                 iter_data->nwds++;
1282                 break;
1283         default:
1284                 break;
1285         }
1286 }
1287
1288 /* Called with sc->mutex held. */
1289 void ath9k_calculate_iter_data(struct ieee80211_hw *hw,
1290                                struct ieee80211_vif *vif,
1291                                struct ath9k_vif_iter_data *iter_data)
1292 {
1293         struct ath_softc *sc = hw->priv;
1294         struct ath_hw *ah = sc->sc_ah;
1295         struct ath_common *common = ath9k_hw_common(ah);
1296
1297         /*
1298          * Use the hardware MAC address as reference, the hardware uses it
1299          * together with the BSSID mask when matching addresses.
1300          */
1301         memset(iter_data, 0, sizeof(*iter_data));
1302         iter_data->hw_macaddr = common->macaddr;
1303         memset(&iter_data->mask, 0xff, ETH_ALEN);
1304
1305         if (vif)
1306                 ath9k_vif_iter(iter_data, vif->addr, vif);
1307
1308         /* Get list of all active MAC addresses */
1309         ieee80211_iterate_active_interfaces_atomic(sc->hw, ath9k_vif_iter,
1310                                                    iter_data);
1311 }
1312
1313 /* Called with sc->mutex held. */
1314 static void ath9k_calculate_summary_state(struct ieee80211_hw *hw,
1315                                           struct ieee80211_vif *vif)
1316 {
1317         struct ath_softc *sc = hw->priv;
1318         struct ath_hw *ah = sc->sc_ah;
1319         struct ath_common *common = ath9k_hw_common(ah);
1320         struct ath9k_vif_iter_data iter_data;
1321
1322         ath9k_calculate_iter_data(hw, vif, &iter_data);
1323
1324         /* Set BSSID mask. */
1325         memcpy(common->bssidmask, iter_data.mask, ETH_ALEN);
1326         ath_hw_setbssidmask(common);
1327
1328         /* Set op-mode & TSF */
1329         if (iter_data.naps > 0) {
1330                 ath9k_hw_set_tsfadjust(ah, 1);
1331                 sc->sc_flags |= SC_OP_TSF_RESET;
1332                 ah->opmode = NL80211_IFTYPE_AP;
1333         } else {
1334                 ath9k_hw_set_tsfadjust(ah, 0);
1335                 sc->sc_flags &= ~SC_OP_TSF_RESET;
1336
1337                 if (iter_data.nmeshes)
1338                         ah->opmode = NL80211_IFTYPE_MESH_POINT;
1339                 else if (iter_data.nwds)
1340                         ah->opmode = NL80211_IFTYPE_AP;
1341                 else if (iter_data.nadhocs)
1342                         ah->opmode = NL80211_IFTYPE_ADHOC;
1343                 else
1344                         ah->opmode = NL80211_IFTYPE_STATION;
1345         }
1346
1347         /*
1348          * Enable MIB interrupts when there are hardware phy counters.
1349          */
1350         if ((iter_data.nstations + iter_data.nadhocs + iter_data.nmeshes) > 0) {
1351                 if (ah->config.enable_ani)
1352                         ah->imask |= ATH9K_INT_MIB;
1353                 ah->imask |= ATH9K_INT_TSFOOR;
1354         } else {
1355                 ah->imask &= ~ATH9K_INT_MIB;
1356                 ah->imask &= ~ATH9K_INT_TSFOOR;
1357         }
1358
1359         ath9k_hw_set_interrupts(ah);
1360
1361         /* Set up ANI */
1362         if (iter_data.naps > 0) {
1363                 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
1364
1365                 if (!common->disable_ani) {
1366                         sc->sc_flags |= SC_OP_ANI_RUN;
1367                         ath_start_ani(common);
1368                 }
1369
1370         } else {
1371                 sc->sc_flags &= ~SC_OP_ANI_RUN;
1372                 del_timer_sync(&common->ani.timer);
1373         }
1374 }
1375
1376 /* Called with sc->mutex held, vif counts set up properly. */
1377 static void ath9k_do_vif_add_setup(struct ieee80211_hw *hw,
1378                                    struct ieee80211_vif *vif)
1379 {
1380         struct ath_softc *sc = hw->priv;
1381
1382         ath9k_calculate_summary_state(hw, vif);
1383
1384         if (ath9k_uses_beacons(vif->type)) {
1385                 /* Reserve a beacon slot for the vif */
1386                 ath9k_set_beaconing_status(sc, false);
1387                 ath_beacon_alloc(sc, vif);
1388                 ath9k_set_beaconing_status(sc, true);
1389         }
1390 }
1391
1392 void ath_start_rx_poll(struct ath_softc *sc, u8 nbeacon)
1393 {
1394         if (!AR_SREV_9300(sc->sc_ah))
1395                 return;
1396
1397         if (!(sc->sc_flags & SC_OP_PRIM_STA_VIF))
1398                 return;
1399
1400         mod_timer(&sc->rx_poll_timer, jiffies + msecs_to_jiffies
1401                         (nbeacon * sc->cur_beacon_conf.beacon_interval));
1402 }
1403
1404 void ath_rx_poll(unsigned long data)
1405 {
1406         struct ath_softc *sc = (struct ath_softc *)data;
1407
1408         ieee80211_queue_work(sc->hw, &sc->hw_check_work);
1409 }
1410
1411 static int ath9k_add_interface(struct ieee80211_hw *hw,
1412                                struct ieee80211_vif *vif)
1413 {
1414         struct ath_softc *sc = hw->priv;
1415         struct ath_hw *ah = sc->sc_ah;
1416         struct ath_common *common = ath9k_hw_common(ah);
1417         int ret = 0;
1418
1419         ath9k_ps_wakeup(sc);
1420         mutex_lock(&sc->mutex);
1421
1422         switch (vif->type) {
1423         case NL80211_IFTYPE_STATION:
1424         case NL80211_IFTYPE_WDS:
1425         case NL80211_IFTYPE_ADHOC:
1426         case NL80211_IFTYPE_AP:
1427         case NL80211_IFTYPE_MESH_POINT:
1428                 break;
1429         default:
1430                 ath_err(common, "Interface type %d not yet supported\n",
1431                         vif->type);
1432                 ret = -EOPNOTSUPP;
1433                 goto out;
1434         }
1435
1436         if (ath9k_uses_beacons(vif->type)) {
1437                 if (sc->nbcnvifs >= ATH_BCBUF) {
1438                         ath_err(common, "Not enough beacon buffers when adding"
1439                                 " new interface of type: %i\n",
1440                                 vif->type);
1441                         ret = -ENOBUFS;
1442                         goto out;
1443                 }
1444         }
1445
1446         if ((ah->opmode == NL80211_IFTYPE_ADHOC) ||
1447             ((vif->type == NL80211_IFTYPE_ADHOC) &&
1448              sc->nvifs > 0)) {
1449                 ath_err(common, "Cannot create ADHOC interface when other"
1450                         " interfaces already exist.\n");
1451                 ret = -EINVAL;
1452                 goto out;
1453         }
1454
1455         ath_dbg(common, CONFIG, "Attach a VIF of type: %d\n", vif->type);
1456
1457         sc->nvifs++;
1458
1459         ath9k_do_vif_add_setup(hw, vif);
1460 out:
1461         mutex_unlock(&sc->mutex);
1462         ath9k_ps_restore(sc);
1463         return ret;
1464 }
1465
1466 static int ath9k_change_interface(struct ieee80211_hw *hw,
1467                                   struct ieee80211_vif *vif,
1468                                   enum nl80211_iftype new_type,
1469                                   bool p2p)
1470 {
1471         struct ath_softc *sc = hw->priv;
1472         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1473         int ret = 0;
1474
1475         ath_dbg(common, CONFIG, "Change Interface\n");
1476         mutex_lock(&sc->mutex);
1477         ath9k_ps_wakeup(sc);
1478
1479         /* See if new interface type is valid. */
1480         if ((new_type == NL80211_IFTYPE_ADHOC) &&
1481             (sc->nvifs > 1)) {
1482                 ath_err(common, "When using ADHOC, it must be the only"
1483                         " interface.\n");
1484                 ret = -EINVAL;
1485                 goto out;
1486         }
1487
1488         if (ath9k_uses_beacons(new_type) &&
1489             !ath9k_uses_beacons(vif->type)) {
1490                 if (sc->nbcnvifs >= ATH_BCBUF) {
1491                         ath_err(common, "No beacon slot available\n");
1492                         ret = -ENOBUFS;
1493                         goto out;
1494                 }
1495         }
1496
1497         /* Clean up old vif stuff */
1498         if (ath9k_uses_beacons(vif->type))
1499                 ath9k_reclaim_beacon(sc, vif);
1500
1501         /* Add new settings */
1502         vif->type = new_type;
1503         vif->p2p = p2p;
1504
1505         ath9k_do_vif_add_setup(hw, vif);
1506 out:
1507         ath9k_ps_restore(sc);
1508         mutex_unlock(&sc->mutex);
1509         return ret;
1510 }
1511
1512 static void ath9k_remove_interface(struct ieee80211_hw *hw,
1513                                    struct ieee80211_vif *vif)
1514 {
1515         struct ath_softc *sc = hw->priv;
1516         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1517
1518         ath_dbg(common, CONFIG, "Detach Interface\n");
1519
1520         ath9k_ps_wakeup(sc);
1521         mutex_lock(&sc->mutex);
1522
1523         sc->nvifs--;
1524
1525         /* Reclaim beacon resources */
1526         if (ath9k_uses_beacons(vif->type))
1527                 ath9k_reclaim_beacon(sc, vif);
1528
1529         ath9k_calculate_summary_state(hw, NULL);
1530
1531         mutex_unlock(&sc->mutex);
1532         ath9k_ps_restore(sc);
1533 }
1534
1535 static void ath9k_enable_ps(struct ath_softc *sc)
1536 {
1537         struct ath_hw *ah = sc->sc_ah;
1538         struct ath_common *common = ath9k_hw_common(ah);
1539
1540         sc->ps_enabled = true;
1541         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1542                 if ((ah->imask & ATH9K_INT_TIM_TIMER) == 0) {
1543                         ah->imask |= ATH9K_INT_TIM_TIMER;
1544                         ath9k_hw_set_interrupts(ah);
1545                 }
1546                 ath9k_hw_setrxabort(ah, 1);
1547         }
1548         ath_dbg(common, PS, "PowerSave enabled\n");
1549 }
1550
1551 static void ath9k_disable_ps(struct ath_softc *sc)
1552 {
1553         struct ath_hw *ah = sc->sc_ah;
1554         struct ath_common *common = ath9k_hw_common(ah);
1555
1556         sc->ps_enabled = false;
1557         ath9k_hw_setpower(ah, ATH9K_PM_AWAKE);
1558         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1559                 ath9k_hw_setrxabort(ah, 0);
1560                 sc->ps_flags &= ~(PS_WAIT_FOR_BEACON |
1561                                   PS_WAIT_FOR_CAB |
1562                                   PS_WAIT_FOR_PSPOLL_DATA |
1563                                   PS_WAIT_FOR_TX_ACK);
1564                 if (ah->imask & ATH9K_INT_TIM_TIMER) {
1565                         ah->imask &= ~ATH9K_INT_TIM_TIMER;
1566                         ath9k_hw_set_interrupts(ah);
1567                 }
1568         }
1569         ath_dbg(common, PS, "PowerSave disabled\n");
1570 }
1571
1572 static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
1573 {
1574         struct ath_softc *sc = hw->priv;
1575         struct ath_hw *ah = sc->sc_ah;
1576         struct ath_common *common = ath9k_hw_common(ah);
1577         struct ieee80211_conf *conf = &hw->conf;
1578         bool reset_channel = false;
1579
1580         ath9k_ps_wakeup(sc);
1581         mutex_lock(&sc->mutex);
1582
1583         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
1584                 sc->ps_idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1585                 if (sc->ps_idle)
1586                         ath_cancel_work(sc);
1587                 else
1588                         /*
1589                          * The chip needs a reset to properly wake up from
1590                          * full sleep
1591                          */
1592                         reset_channel = ah->chip_fullsleep;
1593         }
1594
1595         /*
1596          * We just prepare to enable PS. We have to wait until our AP has
1597          * ACK'd our null data frame to disable RX otherwise we'll ignore
1598          * those ACKs and end up retransmitting the same null data frames.
1599          * IEEE80211_CONF_CHANGE_PS is only passed by mac80211 for STA mode.
1600          */
1601         if (changed & IEEE80211_CONF_CHANGE_PS) {
1602                 unsigned long flags;
1603                 spin_lock_irqsave(&sc->sc_pm_lock, flags);
1604                 if (conf->flags & IEEE80211_CONF_PS)
1605                         ath9k_enable_ps(sc);
1606                 else
1607                         ath9k_disable_ps(sc);
1608                 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1609         }
1610
1611         if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
1612                 if (conf->flags & IEEE80211_CONF_MONITOR) {
1613                         ath_dbg(common, CONFIG, "Monitor mode is enabled\n");
1614                         sc->sc_ah->is_monitoring = true;
1615                 } else {
1616                         ath_dbg(common, CONFIG, "Monitor mode is disabled\n");
1617                         sc->sc_ah->is_monitoring = false;
1618                 }
1619         }
1620
1621         if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) || reset_channel) {
1622                 struct ieee80211_channel *curchan = hw->conf.channel;
1623                 int pos = curchan->hw_value;
1624                 int old_pos = -1;
1625                 unsigned long flags;
1626
1627                 if (ah->curchan)
1628                         old_pos = ah->curchan - &ah->channels[0];
1629
1630                 if (hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)
1631                         sc->sc_flags |= SC_OP_OFFCHANNEL;
1632                 else
1633                         sc->sc_flags &= ~SC_OP_OFFCHANNEL;
1634
1635                 ath_dbg(common, CONFIG, "Set channel: %d MHz type: %d\n",
1636                         curchan->center_freq, conf->channel_type);
1637
1638                 /* update survey stats for the old channel before switching */
1639                 spin_lock_irqsave(&common->cc_lock, flags);
1640                 ath_update_survey_stats(sc);
1641                 spin_unlock_irqrestore(&common->cc_lock, flags);
1642
1643                 /*
1644                  * Preserve the current channel values, before updating
1645                  * the same channel
1646                  */
1647                 if (ah->curchan && (old_pos == pos))
1648                         ath9k_hw_getnf(ah, ah->curchan);
1649
1650                 ath9k_cmn_update_ichannel(&sc->sc_ah->channels[pos],
1651                                           curchan, conf->channel_type);
1652
1653                 /*
1654                  * If the operating channel changes, change the survey in-use flags
1655                  * along with it.
1656                  * Reset the survey data for the new channel, unless we're switching
1657                  * back to the operating channel from an off-channel operation.
1658                  */
1659                 if (!(hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) &&
1660                     sc->cur_survey != &sc->survey[pos]) {
1661
1662                         if (sc->cur_survey)
1663                                 sc->cur_survey->filled &= ~SURVEY_INFO_IN_USE;
1664
1665                         sc->cur_survey = &sc->survey[pos];
1666
1667                         memset(sc->cur_survey, 0, sizeof(struct survey_info));
1668                         sc->cur_survey->filled |= SURVEY_INFO_IN_USE;
1669                 } else if (!(sc->survey[pos].filled & SURVEY_INFO_IN_USE)) {
1670                         memset(&sc->survey[pos], 0, sizeof(struct survey_info));
1671                 }
1672
1673                 if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) {
1674                         ath_err(common, "Unable to set channel\n");
1675                         mutex_unlock(&sc->mutex);
1676                         return -EINVAL;
1677                 }
1678
1679                 /*
1680                  * The most recent snapshot of channel->noisefloor for the old
1681                  * channel is only available after the hardware reset. Copy it to
1682                  * the survey stats now.
1683                  */
1684                 if (old_pos >= 0)
1685                         ath_update_survey_nf(sc, old_pos);
1686         }
1687
1688         if (changed & IEEE80211_CONF_CHANGE_POWER) {
1689                 ath_dbg(common, CONFIG, "Set power: %d\n", conf->power_level);
1690                 sc->config.txpowlimit = 2 * conf->power_level;
1691                 ath9k_cmn_update_txpow(ah, sc->curtxpow,
1692                                        sc->config.txpowlimit, &sc->curtxpow);
1693         }
1694
1695         mutex_unlock(&sc->mutex);
1696         ath9k_ps_restore(sc);
1697
1698         return 0;
1699 }
1700
1701 #define SUPPORTED_FILTERS                       \
1702         (FIF_PROMISC_IN_BSS |                   \
1703         FIF_ALLMULTI |                          \
1704         FIF_CONTROL |                           \
1705         FIF_PSPOLL |                            \
1706         FIF_OTHER_BSS |                         \
1707         FIF_BCN_PRBRESP_PROMISC |               \
1708         FIF_PROBE_REQ |                         \
1709         FIF_FCSFAIL)
1710
1711 /* FIXME: sc->sc_full_reset ? */
1712 static void ath9k_configure_filter(struct ieee80211_hw *hw,
1713                                    unsigned int changed_flags,
1714                                    unsigned int *total_flags,
1715                                    u64 multicast)
1716 {
1717         struct ath_softc *sc = hw->priv;
1718         u32 rfilt;
1719
1720         changed_flags &= SUPPORTED_FILTERS;
1721         *total_flags &= SUPPORTED_FILTERS;
1722
1723         sc->rx.rxfilter = *total_flags;
1724         ath9k_ps_wakeup(sc);
1725         rfilt = ath_calcrxfilter(sc);
1726         ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1727         ath9k_ps_restore(sc);
1728
1729         ath_dbg(ath9k_hw_common(sc->sc_ah), CONFIG, "Set HW RX filter: 0x%x\n",
1730                 rfilt);
1731 }
1732
1733 static int ath9k_sta_add(struct ieee80211_hw *hw,
1734                          struct ieee80211_vif *vif,
1735                          struct ieee80211_sta *sta)
1736 {
1737         struct ath_softc *sc = hw->priv;
1738         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1739         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1740         struct ieee80211_key_conf ps_key = { };
1741
1742         ath_node_attach(sc, sta, vif);
1743
1744         if (vif->type != NL80211_IFTYPE_AP &&
1745             vif->type != NL80211_IFTYPE_AP_VLAN)
1746                 return 0;
1747
1748         an->ps_key = ath_key_config(common, vif, sta, &ps_key);
1749
1750         return 0;
1751 }
1752
1753 static void ath9k_del_ps_key(struct ath_softc *sc,
1754                              struct ieee80211_vif *vif,
1755                              struct ieee80211_sta *sta)
1756 {
1757         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1758         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1759         struct ieee80211_key_conf ps_key = { .hw_key_idx = an->ps_key };
1760
1761         if (!an->ps_key)
1762             return;
1763
1764         ath_key_delete(common, &ps_key);
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_softc *sc = hw->priv;
1772
1773         ath9k_del_ps_key(sc, vif, sta);
1774         ath_node_detach(sc, sta);
1775
1776         return 0;
1777 }
1778
1779 static void ath9k_sta_notify(struct ieee80211_hw *hw,
1780                          struct ieee80211_vif *vif,
1781                          enum sta_notify_cmd cmd,
1782                          struct ieee80211_sta *sta)
1783 {
1784         struct ath_softc *sc = hw->priv;
1785         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1786
1787         if (!sta->ht_cap.ht_supported)
1788                 return;
1789
1790         switch (cmd) {
1791         case STA_NOTIFY_SLEEP:
1792                 an->sleeping = true;
1793                 ath_tx_aggr_sleep(sta, sc, an);
1794                 break;
1795         case STA_NOTIFY_AWAKE:
1796                 an->sleeping = false;
1797                 ath_tx_aggr_wakeup(sc, an);
1798                 break;
1799         }
1800 }
1801
1802 static int ath9k_conf_tx(struct ieee80211_hw *hw,
1803                          struct ieee80211_vif *vif, u16 queue,
1804                          const struct ieee80211_tx_queue_params *params)
1805 {
1806         struct ath_softc *sc = hw->priv;
1807         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1808         struct ath_txq *txq;
1809         struct ath9k_tx_queue_info qi;
1810         int ret = 0;
1811
1812         if (queue >= WME_NUM_AC)
1813                 return 0;
1814
1815         txq = sc->tx.txq_map[queue];
1816
1817         ath9k_ps_wakeup(sc);
1818         mutex_lock(&sc->mutex);
1819
1820         memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
1821
1822         qi.tqi_aifs = params->aifs;
1823         qi.tqi_cwmin = params->cw_min;
1824         qi.tqi_cwmax = params->cw_max;
1825         qi.tqi_burstTime = params->txop;
1826
1827         ath_dbg(common, CONFIG,
1828                 "Configure tx [queue/halq] [%d/%d], aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
1829                 queue, txq->axq_qnum, params->aifs, params->cw_min,
1830                 params->cw_max, params->txop);
1831
1832         ret = ath_txq_update(sc, txq->axq_qnum, &qi);
1833         if (ret)
1834                 ath_err(common, "TXQ Update failed\n");
1835
1836         if (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC)
1837                 if (queue == WME_AC_BE && !ret)
1838                         ath_beaconq_config(sc);
1839
1840         mutex_unlock(&sc->mutex);
1841         ath9k_ps_restore(sc);
1842
1843         return ret;
1844 }
1845
1846 static int ath9k_set_key(struct ieee80211_hw *hw,
1847                          enum set_key_cmd cmd,
1848                          struct ieee80211_vif *vif,
1849                          struct ieee80211_sta *sta,
1850                          struct ieee80211_key_conf *key)
1851 {
1852         struct ath_softc *sc = hw->priv;
1853         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1854         int ret = 0;
1855
1856         if (ath9k_modparam_nohwcrypt)
1857                 return -ENOSPC;
1858
1859         if ((vif->type == NL80211_IFTYPE_ADHOC ||
1860              vif->type == NL80211_IFTYPE_MESH_POINT) &&
1861             (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
1862              key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
1863             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
1864                 /*
1865                  * For now, disable hw crypto for the RSN IBSS group keys. This
1866                  * could be optimized in the future to use a modified key cache
1867                  * design to support per-STA RX GTK, but until that gets
1868                  * implemented, use of software crypto for group addressed
1869                  * frames is a acceptable to allow RSN IBSS to be used.
1870                  */
1871                 return -EOPNOTSUPP;
1872         }
1873
1874         mutex_lock(&sc->mutex);
1875         ath9k_ps_wakeup(sc);
1876         ath_dbg(common, CONFIG, "Set HW Key\n");
1877
1878         switch (cmd) {
1879         case SET_KEY:
1880                 if (sta)
1881                         ath9k_del_ps_key(sc, vif, sta);
1882
1883                 ret = ath_key_config(common, vif, sta, key);
1884                 if (ret >= 0) {
1885                         key->hw_key_idx = ret;
1886                         /* push IV and Michael MIC generation to stack */
1887                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1888                         if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
1889                                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1890                         if (sc->sc_ah->sw_mgmt_crypto &&
1891                             key->cipher == WLAN_CIPHER_SUITE_CCMP)
1892                                 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT;
1893                         ret = 0;
1894                 }
1895                 break;
1896         case DISABLE_KEY:
1897                 ath_key_delete(common, key);
1898                 break;
1899         default:
1900                 ret = -EINVAL;
1901         }
1902
1903         ath9k_ps_restore(sc);
1904         mutex_unlock(&sc->mutex);
1905
1906         return ret;
1907 }
1908 static void ath9k_bss_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1909 {
1910         struct ath_softc *sc = data;
1911         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1912         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1913         struct ath_vif *avp = (void *)vif->drv_priv;
1914
1915         /*
1916          * Skip iteration if primary station vif's bss info
1917          * was not changed
1918          */
1919         if (sc->sc_flags & SC_OP_PRIM_STA_VIF)
1920                 return;
1921
1922         if (bss_conf->assoc) {
1923                 sc->sc_flags |= SC_OP_PRIM_STA_VIF;
1924                 avp->primary_sta_vif = true;
1925                 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1926                 common->curaid = bss_conf->aid;
1927                 ath9k_hw_write_associd(sc->sc_ah);
1928                 ath_dbg(common, CONFIG, "Bss Info ASSOC %d, bssid: %pM\n",
1929                         bss_conf->aid, common->curbssid);
1930                 ath_beacon_config(sc, vif);
1931                 /*
1932                  * Request a re-configuration of Beacon related timers
1933                  * on the receipt of the first Beacon frame (i.e.,
1934                  * after time sync with the AP).
1935                  */
1936                 sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
1937                 /* Reset rssi stats */
1938                 sc->last_rssi = ATH_RSSI_DUMMY_MARKER;
1939                 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
1940
1941                 ath_start_rx_poll(sc, 3);
1942
1943                 if (!common->disable_ani) {
1944                         sc->sc_flags |= SC_OP_ANI_RUN;
1945                         ath_start_ani(common);
1946                 }
1947
1948         }
1949 }
1950
1951 static void ath9k_config_bss(struct ath_softc *sc, struct ieee80211_vif *vif)
1952 {
1953         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1954         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1955         struct ath_vif *avp = (void *)vif->drv_priv;
1956
1957         if (sc->sc_ah->opmode != NL80211_IFTYPE_STATION)
1958                 return;
1959
1960         /* Reconfigure bss info */
1961         if (avp->primary_sta_vif && !bss_conf->assoc) {
1962                 ath_dbg(common, CONFIG, "Bss Info DISASSOC %d, bssid %pM\n",
1963                         common->curaid, common->curbssid);
1964                 sc->sc_flags &= ~(SC_OP_PRIM_STA_VIF | SC_OP_BEACONS);
1965                 avp->primary_sta_vif = false;
1966                 memset(common->curbssid, 0, ETH_ALEN);
1967                 common->curaid = 0;
1968         }
1969
1970         ieee80211_iterate_active_interfaces_atomic(
1971                         sc->hw, ath9k_bss_iter, sc);
1972
1973         /*
1974          * None of station vifs are associated.
1975          * Clear bssid & aid
1976          */
1977         if (!(sc->sc_flags & SC_OP_PRIM_STA_VIF)) {
1978                 ath9k_hw_write_associd(sc->sc_ah);
1979                 /* Stop ANI */
1980                 sc->sc_flags &= ~SC_OP_ANI_RUN;
1981                 del_timer_sync(&common->ani.timer);
1982                 del_timer_sync(&sc->rx_poll_timer);
1983                 memset(&sc->caldata, 0, sizeof(sc->caldata));
1984         }
1985 }
1986
1987 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
1988                                    struct ieee80211_vif *vif,
1989                                    struct ieee80211_bss_conf *bss_conf,
1990                                    u32 changed)
1991 {
1992         struct ath_softc *sc = hw->priv;
1993         struct ath_hw *ah = sc->sc_ah;
1994         struct ath_common *common = ath9k_hw_common(ah);
1995         struct ath_vif *avp = (void *)vif->drv_priv;
1996         int slottime;
1997
1998         ath9k_ps_wakeup(sc);
1999         mutex_lock(&sc->mutex);
2000
2001         if (changed & BSS_CHANGED_ASSOC) {
2002                 ath9k_config_bss(sc, vif);
2003
2004                 ath_dbg(common, CONFIG, "BSSID: %pM aid: 0x%x\n",
2005                         common->curbssid, common->curaid);
2006         }
2007
2008         if (changed & BSS_CHANGED_IBSS) {
2009                 /* There can be only one vif available */
2010                 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
2011                 common->curaid = bss_conf->aid;
2012                 ath9k_hw_write_associd(sc->sc_ah);
2013
2014                 if (bss_conf->ibss_joined) {
2015                         sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
2016
2017                         if (!common->disable_ani) {
2018                                 sc->sc_flags |= SC_OP_ANI_RUN;
2019                                 ath_start_ani(common);
2020                         }
2021
2022                 } else {
2023                         sc->sc_flags &= ~SC_OP_ANI_RUN;
2024                         del_timer_sync(&common->ani.timer);
2025                         del_timer_sync(&sc->rx_poll_timer);
2026                 }
2027         }
2028
2029         /*
2030          * In case of AP mode, the HW TSF has to be reset
2031          * when the beacon interval changes.
2032          */
2033         if ((changed & BSS_CHANGED_BEACON_INT) &&
2034             (vif->type == NL80211_IFTYPE_AP))
2035                 sc->sc_flags |= SC_OP_TSF_RESET;
2036
2037         /* Configure beaconing (AP, IBSS, MESH) */
2038         if (ath9k_uses_beacons(vif->type) &&
2039             ((changed & BSS_CHANGED_BEACON) ||
2040              (changed & BSS_CHANGED_BEACON_ENABLED) ||
2041              (changed & BSS_CHANGED_BEACON_INT))) {
2042                 ath9k_set_beaconing_status(sc, false);
2043                 if (bss_conf->enable_beacon)
2044                         ath_beacon_alloc(sc, vif);
2045                 else
2046                         avp->is_bslot_active = false;
2047                 ath_beacon_config(sc, vif);
2048                 ath9k_set_beaconing_status(sc, true);
2049         }
2050
2051         if (changed & BSS_CHANGED_ERP_SLOT) {
2052                 if (bss_conf->use_short_slot)
2053                         slottime = 9;
2054                 else
2055                         slottime = 20;
2056                 if (vif->type == NL80211_IFTYPE_AP) {
2057                         /*
2058                          * Defer update, so that connected stations can adjust
2059                          * their settings at the same time.
2060                          * See beacon.c for more details
2061                          */
2062                         sc->beacon.slottime = slottime;
2063                         sc->beacon.updateslot = UPDATE;
2064                 } else {
2065                         ah->slottime = slottime;
2066                         ath9k_hw_init_global_settings(ah);
2067                 }
2068         }
2069
2070         mutex_unlock(&sc->mutex);
2071         ath9k_ps_restore(sc);
2072 }
2073
2074 static u64 ath9k_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
2075 {
2076         struct ath_softc *sc = hw->priv;
2077         u64 tsf;
2078
2079         mutex_lock(&sc->mutex);
2080         ath9k_ps_wakeup(sc);
2081         tsf = ath9k_hw_gettsf64(sc->sc_ah);
2082         ath9k_ps_restore(sc);
2083         mutex_unlock(&sc->mutex);
2084
2085         return tsf;
2086 }
2087
2088 static void ath9k_set_tsf(struct ieee80211_hw *hw,
2089                           struct ieee80211_vif *vif,
2090                           u64 tsf)
2091 {
2092         struct ath_softc *sc = hw->priv;
2093
2094         mutex_lock(&sc->mutex);
2095         ath9k_ps_wakeup(sc);
2096         ath9k_hw_settsf64(sc->sc_ah, tsf);
2097         ath9k_ps_restore(sc);
2098         mutex_unlock(&sc->mutex);
2099 }
2100
2101 static void ath9k_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
2102 {
2103         struct ath_softc *sc = hw->priv;
2104
2105         mutex_lock(&sc->mutex);
2106
2107         ath9k_ps_wakeup(sc);
2108         ath9k_hw_reset_tsf(sc->sc_ah);
2109         ath9k_ps_restore(sc);
2110
2111         mutex_unlock(&sc->mutex);
2112 }
2113
2114 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
2115                               struct ieee80211_vif *vif,
2116                               enum ieee80211_ampdu_mlme_action action,
2117                               struct ieee80211_sta *sta,
2118                               u16 tid, u16 *ssn, u8 buf_size)
2119 {
2120         struct ath_softc *sc = hw->priv;
2121         int ret = 0;
2122
2123         local_bh_disable();
2124
2125         switch (action) {
2126         case IEEE80211_AMPDU_RX_START:
2127                 break;
2128         case IEEE80211_AMPDU_RX_STOP:
2129                 break;
2130         case IEEE80211_AMPDU_TX_START:
2131                 ath9k_ps_wakeup(sc);
2132                 ret = ath_tx_aggr_start(sc, sta, tid, ssn);
2133                 if (!ret)
2134                         ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2135                 ath9k_ps_restore(sc);
2136                 break;
2137         case IEEE80211_AMPDU_TX_STOP:
2138                 ath9k_ps_wakeup(sc);
2139                 ath_tx_aggr_stop(sc, sta, tid);
2140                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2141                 ath9k_ps_restore(sc);
2142                 break;
2143         case IEEE80211_AMPDU_TX_OPERATIONAL:
2144                 ath9k_ps_wakeup(sc);
2145                 ath_tx_aggr_resume(sc, sta, tid);
2146                 ath9k_ps_restore(sc);
2147                 break;
2148         default:
2149                 ath_err(ath9k_hw_common(sc->sc_ah), "Unknown AMPDU action\n");
2150         }
2151
2152         local_bh_enable();
2153
2154         return ret;
2155 }
2156
2157 static int ath9k_get_survey(struct ieee80211_hw *hw, int idx,
2158                              struct survey_info *survey)
2159 {
2160         struct ath_softc *sc = hw->priv;
2161         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2162         struct ieee80211_supported_band *sband;
2163         struct ieee80211_channel *chan;
2164         unsigned long flags;
2165         int pos;
2166
2167         spin_lock_irqsave(&common->cc_lock, flags);
2168         if (idx == 0)
2169                 ath_update_survey_stats(sc);
2170
2171         sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ];
2172         if (sband && idx >= sband->n_channels) {
2173                 idx -= sband->n_channels;
2174                 sband = NULL;
2175         }
2176
2177         if (!sband)
2178                 sband = hw->wiphy->bands[IEEE80211_BAND_5GHZ];
2179
2180         if (!sband || idx >= sband->n_channels) {
2181                 spin_unlock_irqrestore(&common->cc_lock, flags);
2182                 return -ENOENT;
2183         }
2184
2185         chan = &sband->channels[idx];
2186         pos = chan->hw_value;
2187         memcpy(survey, &sc->survey[pos], sizeof(*survey));
2188         survey->channel = chan;
2189         spin_unlock_irqrestore(&common->cc_lock, flags);
2190
2191         return 0;
2192 }
2193
2194 static void ath9k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
2195 {
2196         struct ath_softc *sc = hw->priv;
2197         struct ath_hw *ah = sc->sc_ah;
2198
2199         mutex_lock(&sc->mutex);
2200         ah->coverage_class = coverage_class;
2201
2202         ath9k_ps_wakeup(sc);
2203         ath9k_hw_init_global_settings(ah);
2204         ath9k_ps_restore(sc);
2205
2206         mutex_unlock(&sc->mutex);
2207 }
2208
2209 static void ath9k_flush(struct ieee80211_hw *hw, bool drop)
2210 {
2211         struct ath_softc *sc = hw->priv;
2212         struct ath_hw *ah = sc->sc_ah;
2213         struct ath_common *common = ath9k_hw_common(ah);
2214         int timeout = 200; /* ms */
2215         int i, j;
2216         bool drain_txq;
2217
2218         mutex_lock(&sc->mutex);
2219         cancel_delayed_work_sync(&sc->tx_complete_work);
2220
2221         if (ah->ah_flags & AH_UNPLUGGED) {
2222                 ath_dbg(common, ANY, "Device has been unplugged!\n");
2223                 mutex_unlock(&sc->mutex);
2224                 return;
2225         }
2226
2227         if (sc->sc_flags & SC_OP_INVALID) {
2228                 ath_dbg(common, ANY, "Device not present\n");
2229                 mutex_unlock(&sc->mutex);
2230                 return;
2231         }
2232
2233         for (j = 0; j < timeout; j++) {
2234                 bool npend = false;
2235
2236                 if (j)
2237                         usleep_range(1000, 2000);
2238
2239                 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
2240                         if (!ATH_TXQ_SETUP(sc, i))
2241                                 continue;
2242
2243                         npend = ath9k_has_pending_frames(sc, &sc->tx.txq[i]);
2244
2245                         if (npend)
2246                                 break;
2247                 }
2248
2249                 if (!npend)
2250                     break;
2251         }
2252
2253         if (drop) {
2254                 ath9k_ps_wakeup(sc);
2255                 spin_lock_bh(&sc->sc_pcu_lock);
2256                 drain_txq = ath_drain_all_txq(sc, false);
2257                 spin_unlock_bh(&sc->sc_pcu_lock);
2258
2259                 if (!drain_txq)
2260                         ath_reset(sc, false);
2261
2262                 ath9k_ps_restore(sc);
2263                 ieee80211_wake_queues(hw);
2264         }
2265
2266         ieee80211_queue_delayed_work(hw, &sc->tx_complete_work, 0);
2267         mutex_unlock(&sc->mutex);
2268 }
2269
2270 static bool ath9k_tx_frames_pending(struct ieee80211_hw *hw)
2271 {
2272         struct ath_softc *sc = hw->priv;
2273         int i;
2274
2275         for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
2276                 if (!ATH_TXQ_SETUP(sc, i))
2277                         continue;
2278
2279                 if (ath9k_has_pending_frames(sc, &sc->tx.txq[i]))
2280                         return true;
2281         }
2282         return false;
2283 }
2284
2285 static int ath9k_tx_last_beacon(struct ieee80211_hw *hw)
2286 {
2287         struct ath_softc *sc = hw->priv;
2288         struct ath_hw *ah = sc->sc_ah;
2289         struct ieee80211_vif *vif;
2290         struct ath_vif *avp;
2291         struct ath_buf *bf;
2292         struct ath_tx_status ts;
2293         bool edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA);
2294         int status;
2295
2296         vif = sc->beacon.bslot[0];
2297         if (!vif)
2298                 return 0;
2299
2300         avp = (void *)vif->drv_priv;
2301         if (!avp->is_bslot_active)
2302                 return 0;
2303
2304         if (!sc->beacon.tx_processed && !edma) {
2305                 tasklet_disable(&sc->bcon_tasklet);
2306
2307                 bf = avp->av_bcbuf;
2308                 if (!bf || !bf->bf_mpdu)
2309                         goto skip;
2310
2311                 status = ath9k_hw_txprocdesc(ah, bf->bf_desc, &ts);
2312                 if (status == -EINPROGRESS)
2313                         goto skip;
2314
2315                 sc->beacon.tx_processed = true;
2316                 sc->beacon.tx_last = !(ts.ts_status & ATH9K_TXERR_MASK);
2317
2318 skip:
2319                 tasklet_enable(&sc->bcon_tasklet);
2320         }
2321
2322         return sc->beacon.tx_last;
2323 }
2324
2325 static int ath9k_get_stats(struct ieee80211_hw *hw,
2326                            struct ieee80211_low_level_stats *stats)
2327 {
2328         struct ath_softc *sc = hw->priv;
2329         struct ath_hw *ah = sc->sc_ah;
2330         struct ath9k_mib_stats *mib_stats = &ah->ah_mibStats;
2331
2332         stats->dot11ACKFailureCount = mib_stats->ackrcv_bad;
2333         stats->dot11RTSFailureCount = mib_stats->rts_bad;
2334         stats->dot11FCSErrorCount = mib_stats->fcs_bad;
2335         stats->dot11RTSSuccessCount = mib_stats->rts_good;
2336         return 0;
2337 }
2338
2339 static u32 fill_chainmask(u32 cap, u32 new)
2340 {
2341         u32 filled = 0;
2342         int i;
2343
2344         for (i = 0; cap && new; i++, cap >>= 1) {
2345                 if (!(cap & BIT(0)))
2346                         continue;
2347
2348                 if (new & BIT(0))
2349                         filled |= BIT(i);
2350
2351                 new >>= 1;
2352         }
2353
2354         return filled;
2355 }
2356
2357 static int ath9k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
2358 {
2359         struct ath_softc *sc = hw->priv;
2360         struct ath_hw *ah = sc->sc_ah;
2361
2362         if (!rx_ant || !tx_ant)
2363                 return -EINVAL;
2364
2365         sc->ant_rx = rx_ant;
2366         sc->ant_tx = tx_ant;
2367
2368         if (ah->caps.rx_chainmask == 1)
2369                 return 0;
2370
2371         /* AR9100 runs into calibration issues if not all rx chains are enabled */
2372         if (AR_SREV_9100(ah))
2373                 ah->rxchainmask = 0x7;
2374         else
2375                 ah->rxchainmask = fill_chainmask(ah->caps.rx_chainmask, rx_ant);
2376
2377         ah->txchainmask = fill_chainmask(ah->caps.tx_chainmask, tx_ant);
2378         ath9k_reload_chainmask_settings(sc);
2379
2380         return 0;
2381 }
2382
2383 static int ath9k_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant)
2384 {
2385         struct ath_softc *sc = hw->priv;
2386
2387         *tx_ant = sc->ant_tx;
2388         *rx_ant = sc->ant_rx;
2389         return 0;
2390 }
2391
2392 struct ieee80211_ops ath9k_ops = {
2393         .tx                 = ath9k_tx,
2394         .start              = ath9k_start,
2395         .stop               = ath9k_stop,
2396         .add_interface      = ath9k_add_interface,
2397         .change_interface   = ath9k_change_interface,
2398         .remove_interface   = ath9k_remove_interface,
2399         .config             = ath9k_config,
2400         .configure_filter   = ath9k_configure_filter,
2401         .sta_add            = ath9k_sta_add,
2402         .sta_remove         = ath9k_sta_remove,
2403         .sta_notify         = ath9k_sta_notify,
2404         .conf_tx            = ath9k_conf_tx,
2405         .bss_info_changed   = ath9k_bss_info_changed,
2406         .set_key            = ath9k_set_key,
2407         .get_tsf            = ath9k_get_tsf,
2408         .set_tsf            = ath9k_set_tsf,
2409         .reset_tsf          = ath9k_reset_tsf,
2410         .ampdu_action       = ath9k_ampdu_action,
2411         .get_survey         = ath9k_get_survey,
2412         .rfkill_poll        = ath9k_rfkill_poll_state,
2413         .set_coverage_class = ath9k_set_coverage_class,
2414         .flush              = ath9k_flush,
2415         .tx_frames_pending  = ath9k_tx_frames_pending,
2416         .tx_last_beacon     = ath9k_tx_last_beacon,
2417         .get_stats          = ath9k_get_stats,
2418         .set_antenna        = ath9k_set_antenna,
2419         .get_antenna        = ath9k_get_antenna,
2420 };