package/mac80211/patches/582-ath9k_merge_reset_functions.patch

   1 --- a/drivers/net/wireless/ath/ath9k/main.c
   2 +++ b/drivers/net/wireless/ath/ath9k/main.c
   3 @@ -212,84 +212,57 @@ static int ath_update_survey_stats(struc
   4         return ret;
   5  }
   6
   7 -/*
   8 - * Set/change channels.  If the channel is really being changed, it's done
   9 - * by reseting the chip.  To accomplish this we must first cleanup any pending
  10 - * DMA, then restart stuff.
  11 -*/
  12 -static int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
  13 -                   struct ath9k_channel *hchan)
  14 +static void __ath_cancel_work(struct ath_softc *sc)
  15  {
  16 -       struct ath_hw *ah = sc->sc_ah;
  17 -       struct ath_common *common = ath9k_hw_common(ah);
  18 -       struct ieee80211_conf *conf = &common->hw->conf;
  19 -       bool fastcc = true, stopped;
  20 -       struct ieee80211_channel *channel = hw->conf.channel;
  21 -       struct ath9k_hw_cal_data *caldata = NULL;
  22 -       int r;
  23 -
  24 -       if (sc->sc_flags & SC_OP_INVALID)
  25 -               return -EIO;
  26 -
  27 -       sc->hw_busy_count = 0;
  28 -
  29 -       del_timer_sync(&common->ani.timer);
  30         cancel_work_sync(&sc->paprd_work);
  31         cancel_work_sync(&sc->hw_check_work);
  32 -       cancel_work_sync(&sc->hw_reset_work);
  33         cancel_delayed_work_sync(&sc->tx_complete_work);
  34         cancel_delayed_work_sync(&sc->hw_pll_work);
  35 +}
  36
  37 -       ath9k_ps_wakeup(sc);
  38 +static void ath_cancel_work(struct ath_softc *sc)
  39 +{
  40 +       __ath_cancel_work(sc);
  41 +       cancel_work_sync(&sc->hw_reset_work);
  42 +}
  43
  44 -       spin_lock_bh(&sc->sc_pcu_lock);
  45 +static bool ath_prepare_reset(struct ath_softc *sc, bool retry_tx, bool flush)
  46 +{
  47 +       struct ath_hw *ah = sc->sc_ah;
  48 +       struct ath_common *common = ath9k_hw_common(ah);
  49 +       bool ret;
  50
  51 -       /*
  52 -        * This is only performed if the channel settings have
  53 -        * actually changed.
  54 -        *
  55 -        * To switch channels clear any pending DMA operations;
  56 -        * wait long enough for the RX fifo to drain, reset the
  57 -        * hardware at the new frequency, and then re-enable
  58 -        * the relevant bits of the h/w.
  59 -        */
  60 -       ath9k_hw_disable_interrupts(ah);
  61 -       stopped = ath_drain_all_txq(sc, false);
  62 +       ieee80211_stop_queues(sc->hw);
  63
  64 -       if (!ath_stoprecv(sc))
  65 -               stopped = false;
  66 +       sc->hw_busy_count = 0;
  67 +       del_timer_sync(&common->ani.timer);
  68
  69 -       if (!ath9k_hw_check_alive(ah))
  70 -               stopped = false;
  71 +       ath9k_hw_disable_interrupts(ah);
  72
  73 -       /* XXX: do not flush receive queue here. We don't want
  74 -        * to flush data frames already in queue because of
  75 -        * changing channel. */
  76 +       ret = ath_drain_all_txq(sc, retry_tx);
  77
  78 -       if (!stopped || !(sc->sc_flags & SC_OP_OFFCHANNEL))
  79 -               fastcc = false;
  80 +       if (!ath_stoprecv(sc))
  81 +               ret = false;
  82
  83 -       if (!(sc->sc_flags & SC_OP_OFFCHANNEL))
  84 -               caldata = &sc->caldata;
  85 +       if (!flush) {
  86 +               if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
  87 +                       ath_rx_tasklet(sc, 0, true);
  88 +               ath_rx_tasklet(sc, 0, false);
  89 +       } else {
  90 +               ath_flushrecv(sc);
  91 +       }
  92
  93 -       ath_dbg(common, ATH_DBG_CONFIG,
  94 -               "(%u MHz) -> (%u MHz), conf_is_ht40: %d fastcc: %d\n",
  95 -               sc->sc_ah->curchan->channel,
  96 -               channel->center_freq, conf_is_ht40(conf),
  97 -               fastcc);
  98 +       return ret;
  99 +}
 100
 101 -       r = ath9k_hw_reset(ah, hchan, caldata, fastcc);
 102 -       if (r) {
 103 -               ath_err(common,
 104 -                       "Unable to reset channel (%u MHz), reset status %d\n",
 105 -                       channel->center_freq, r);
 106 -               goto ps_restore;
 107 -       }
 108 +static bool ath_complete_reset(struct ath_softc *sc, bool start)
 109 +{
 110 +       struct ath_hw *ah = sc->sc_ah;
 111 +       struct ath_common *common = ath9k_hw_common(ah);
 112
 113         if (ath_startrecv(sc) != 0) {
 114                 ath_err(common, "Unable to restart recv logic\n");
 115 -               r = -EIO;
 116 -               goto ps_restore;
 117 +               return false;
 118         }
 119
 120         ath9k_cmn_update_txpow(ah, sc->curtxpow,
 121 @@ -297,21 +270,95 @@ static int ath_set_channel(struct ath_so
 122         ath9k_hw_set_interrupts(ah, ah->imask);
 123         ath9k_hw_enable_interrupts(ah);
 124
 125 -       if (!(sc->sc_flags & (SC_OP_OFFCHANNEL))) {
 126 +       if (!(sc->sc_flags & (SC_OP_OFFCHANNEL)) && start) {
 127                 if (sc->sc_flags & SC_OP_BEACONS)
 128                         ath_set_beacon(sc);
 129 +
 130                 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
 131                 ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/2);
 132                 if (!common->disable_ani)
 133                         ath_start_ani(common);
 134         }
 135
 136 - ps_restore:
 137 -       ieee80211_wake_queues(hw);
 138 +       ieee80211_wake_queues(sc->hw);
 139 +
 140 +       return true;
 141 +}
 142 +
 143 +static int ath_reset_internal(struct ath_softc *sc, struct ath9k_channel *hchan,
 144 +                             bool retry_tx)
 145 +{
 146 +       struct ath_hw *ah = sc->sc_ah;
 147 +       struct ath_common *common = ath9k_hw_common(ah);
 148 +       struct ath9k_hw_cal_data *caldata = NULL;
 149 +       bool fastcc = true;
 150 +       bool flush = false;
 151 +       int r;
 152 +
 153 +       __ath_cancel_work(sc);
 154 +
 155 +       spin_lock_bh(&sc->sc_pcu_lock);
 156 +
 157 +       sc->sc_flags &= ~SC_OP_HW_RESET;
 158
 159 +       if (!(sc->sc_flags & SC_OP_OFFCHANNEL)) {
 160 +               fastcc = false;
 161 +               caldata = &sc->caldata;
 162 +       }
 163 +
 164 +       if (!hchan) {
 165 +               fastcc = false;
 166 +               flush = true;
 167 +               hchan = ah->curchan;
 168 +       }
 169 +
 170 +       if (fastcc && !ath9k_hw_check_alive(ah))
 171 +               fastcc = false;
 172 +
 173 +       if (!ath_prepare_reset(sc, retry_tx, flush))
 174 +               fastcc = false;
 175 +
 176 +       ath_dbg(common, ATH_DBG_CONFIG,
 177 +               "Reset to %u MHz, HT40: %d fastcc: %d\n",
 178 +               hchan->channel, !!(hchan->channelFlags & (CHANNEL_HT40MINUS |
 179 +                                                         CHANNEL_HT40PLUS)),
 180 +               fastcc);
 181 +
 182 +       r = ath9k_hw_reset(ah, hchan, caldata, fastcc);
 183 +       if (r) {
 184 +               ath_err(common,
 185 +                       "Unable to reset channel, reset status %d\n", r);
 186 +               goto out;
 187 +       }
 188 +
 189 +       if (!ath_complete_reset(sc, true))
 190 +               r = -EIO;
 191 +
 192 +out:
 193         spin_unlock_bh(&sc->sc_pcu_lock);
 194 +       return r;
 195 +}
 196 +
 197 +
 198 +/*
 199 + * Set/change channels.  If the channel is really being changed, it's done
 200 + * by reseting the chip.  To accomplish this we must first cleanup any pending
 201 + * DMA, then restart stuff.
 202 +*/
 203 +static int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
 204 +                   struct ath9k_channel *hchan)
 205 +{
 206 +       int r;
 207 +
 208 +       if (sc->sc_flags & SC_OP_INVALID)
 209 +               return -EIO;
 210 +
 211 +       ath9k_ps_wakeup(sc);
 212 +
 213 +       r = ath_reset_internal(sc, hchan, false);
 214
 215         ath9k_ps_restore(sc);
 216 +
 217         return r;
 218  }
 219
 220 @@ -824,28 +871,13 @@ static void ath_radio_enable(struct ath_
 221                         channel->center_freq, r);
 222         }
 223
 224 -       ath9k_cmn_update_txpow(ah, sc->curtxpow,
 225 -                              sc->config.txpowlimit, &sc->curtxpow);
 226 -       if (ath_startrecv(sc) != 0) {
 227 -               ath_err(common, "Unable to restart recv logic\n");
 228 -               goto out;
 229 -       }
 230 -       if (sc->sc_flags & SC_OP_BEACONS)
 231 -               ath_set_beacon(sc);     /* restart beacons */
 232 -
 233 -       /* Re-Enable  interrupts */
 234 -       ath9k_hw_set_interrupts(ah, ah->imask);
 235 -       ath9k_hw_enable_interrupts(ah);
 236 +       ath_complete_reset(sc, true);
 237
 238         /* Enable LED */
 239         ath9k_hw_cfg_output(ah, ah->led_pin,
 240                             AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
 241         ath9k_hw_set_gpio(ah, ah->led_pin, 0);
 242
 243 -       ieee80211_wake_queues(hw);
 244 -       ieee80211_queue_delayed_work(hw, &sc->hw_pll_work, HZ/2);
 245 -
 246 -out:
 247         spin_unlock_bh(&sc->sc_pcu_lock);
 248
 249         ath9k_ps_restore(sc);
 250 @@ -858,11 +890,10 @@ void ath_radio_disable(struct ath_softc
 251         int r;
 252
 253         ath9k_ps_wakeup(sc);
 254 -       cancel_delayed_work_sync(&sc->hw_pll_work);
 255
 256 -       spin_lock_bh(&sc->sc_pcu_lock);
 257 +       ath_cancel_work(sc);
 258
 259 -       ieee80211_stop_queues(hw);
 260 +       spin_lock_bh(&sc->sc_pcu_lock);
 261
 262         /*
 263          * Keep the LED on when the radio is disabled
 264 @@ -873,13 +904,7 @@ void ath_radio_disable(struct ath_softc
 265                 ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
 266         }
 267
 268 -       /* Disable interrupts */
 269 -       ath9k_hw_disable_interrupts(ah);
 270 -
 271 -       ath_drain_all_txq(sc, false);   /* clear pending tx frames */
 272 -
 273 -       ath_stoprecv(sc);               /* turn off frame recv */
 274 -       ath_flushrecv(sc);              /* flush recv queue */
 275 +       ath_prepare_reset(sc, false, true);
 276
 277         if (!ah->curchan)
 278                 ah->curchan = ath9k_cmn_get_curchannel(hw, ah);
 279 @@ -901,49 +926,11 @@ void ath_radio_disable(struct ath_softc
 280
 281  static int ath_reset(struct ath_softc *sc, bool retry_tx)
 282  {
 283 -       struct ath_hw *ah = sc->sc_ah;
 284 -       struct ath_common *common = ath9k_hw_common(ah);
 285 -       struct ieee80211_hw *hw = sc->hw;
 286         int r;
 287
 288 -       sc->sc_flags &= ~SC_OP_HW_RESET;
 289 -       sc->hw_busy_count = 0;
 290 -
 291 -       /* Stop ANI */
 292 -
 293 -       del_timer_sync(&common->ani.timer);
 294 -
 295         ath9k_ps_wakeup(sc);
 296
 297 -       ieee80211_stop_queues(hw);
 298 -
 299 -       ath9k_hw_disable_interrupts(ah);
 300 -       ath_drain_all_txq(sc, retry_tx);
 301 -
 302 -       ath_stoprecv(sc);
 303 -       ath_flushrecv(sc);
 304 -
 305 -       r = ath9k_hw_reset(ah, sc->sc_ah->curchan, ah->caldata, false);
 306 -       if (r)
 307 -               ath_err(common,
 308 -                       "Unable to reset hardware; reset status %d\n", r);
 309 -
 310 -       if (ath_startrecv(sc) != 0)
 311 -               ath_err(common, "Unable to start recv logic\n");
 312 -
 313 -       /*
 314 -        * We may be doing a reset in response to a request
 315 -        * that changes the channel so update any state that
 316 -        * might change as a result.
 317 -        */
 318 -       ath9k_cmn_update_txpow(ah, sc->curtxpow,
 319 -                              sc->config.txpowlimit, &sc->curtxpow);
 320 -
 321 -       if ((sc->sc_flags & SC_OP_BEACONS) || !(sc->sc_flags & (SC_OP_OFFCHANNEL)))
 322 -               ath_set_beacon(sc);     /* restart beacons */
 323 -
 324 -       ath9k_hw_set_interrupts(ah, ah->imask);
 325 -       ath9k_hw_enable_interrupts(ah);
 326 +       r = ath_reset_internal(sc, NULL, retry_tx);
 327
 328         if (retry_tx) {
 329                 int i;
 330 @@ -956,12 +943,6 @@ static int ath_reset(struct ath_softc *s
 331                 }
 332         }
 333
 334 -       ieee80211_wake_queues(hw);
 335 -
 336 -       /* Start ANI */
 337 -       if (!common->disable_ani)
 338 -               ath_start_ani(common);
 339 -
 340         ath9k_ps_restore(sc);
 341
 342         return r;
 343 @@ -971,9 +952,7 @@ void ath_reset_work(struct work_struct *
 344  {
 345         struct ath_softc *sc = container_of(work, struct ath_softc, hw_reset_work);
 346
 347 -       spin_lock_bh(&sc->sc_pcu_lock);
 348         ath_reset(sc, true);
 349 -       spin_unlock_bh(&sc->sc_pcu_lock);
 350  }
 351
 352  void ath_hw_check(struct work_struct *work)
 353 @@ -994,11 +973,8 @@ void ath_hw_check(struct work_struct *wo
 354         ath_dbg(common, ATH_DBG_RESET, "Possible baseband hang, "
 355                 "busy=%d (try %d)\n", busy, sc->hw_busy_count + 1);
 356         if (busy >= 99) {
 357 -               if (++sc->hw_busy_count >= 3) {
 358 -                       spin_lock_bh(&sc->sc_pcu_lock);
 359 -                       ath_reset(sc, true);
 360 -                       spin_unlock_bh(&sc->sc_pcu_lock);
 361 -               }
 362 +               if (++sc->hw_busy_count >= 3)
 363 +                       ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
 364
 365         } else if (busy >= 0)
 366                 sc->hw_busy_count = 0;
 367 @@ -1018,9 +994,7 @@ static void ath_hw_pll_rx_hang_check(str
 368                         /* Rx is hung for more than 500ms. Reset it */
 369                         ath_dbg(common, ATH_DBG_RESET,
 370                                 "Possible RX hang, resetting");
 371 -                       spin_lock_bh(&sc->sc_pcu_lock);
 372 -                       ath_reset(sc, true);
 373 -                       spin_unlock_bh(&sc->sc_pcu_lock);
 374 +                       ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
 375                         count = 0;
 376                 }
 377         } else
 378 @@ -1091,28 +1065,6 @@ static int ath9k_start(struct ieee80211_
 379                 goto mutex_unlock;
 380         }
 381
 382 -       /*
 383 -        * This is needed only to setup initial state
 384 -        * but it's best done after a reset.
 385 -        */
 386 -       ath9k_cmn_update_txpow(ah, sc->curtxpow,
 387 -                       sc->config.txpowlimit, &sc->curtxpow);
 388 -
 389 -       /*
 390 -        * Setup the hardware after reset:
 391 -        * The receive engine is set going.
 392 -        * Frame transmit is handled entirely
 393 -        * in the frame output path; there's nothing to do
 394 -        * here except setup the interrupt mask.
 395 -        */
 396 -       if (ath_startrecv(sc) != 0) {
 397 -               ath_err(common, "Unable to start recv logic\n");
 398 -               r = -EIO;
 399 -               spin_unlock_bh(&sc->sc_pcu_lock);
 400 -               goto mutex_unlock;
 401 -       }
 402 -       spin_unlock_bh(&sc->sc_pcu_lock);
 403 -
 404         /* Setup our intr mask. */
 405         ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL |
 406                     ATH9K_INT_RXORN | ATH9K_INT_FATAL |
 407 @@ -1135,12 +1087,14 @@ static int ath9k_start(struct ieee80211_
 408
 409         /* Disable BMISS interrupt when we're not associated */
 410         ah->imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
 411 -       ath9k_hw_set_interrupts(ah, ah->imask);
 412 -       ath9k_hw_enable_interrupts(ah);
 413
 414 -       ieee80211_wake_queues(hw);
 415 +       if (!ath_complete_reset(sc, false)) {
 416 +               r = -EIO;
 417 +               spin_unlock_bh(&sc->sc_pcu_lock);
 418 +               goto mutex_unlock;
 419 +       }
 420
 421 -       ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
 422 +       spin_unlock_bh(&sc->sc_pcu_lock);
 423
 424         if ((ah->btcoex_hw.scheme != ATH_BTCOEX_CFG_NONE) &&
 425             !ah->btcoex_hw.enabled) {
 426 @@ -1233,11 +1187,7 @@ static void ath9k_stop(struct ieee80211_
 427
 428         mutex_lock(&sc->mutex);
 429
 430 -       cancel_delayed_work_sync(&sc->tx_complete_work);
 431 -       cancel_delayed_work_sync(&sc->hw_pll_work);
 432 -       cancel_work_sync(&sc->paprd_work);
 433 -       cancel_work_sync(&sc->hw_check_work);
 434 -       cancel_work_sync(&sc->hw_reset_work);
 435 +       ath_cancel_work(sc);
 436
 437         if (sc->sc_flags & SC_OP_INVALID) {
 438                 ath_dbg(common, ATH_DBG_ANY, "Device not present\n");
 439 @@ -2354,9 +2304,11 @@ static void ath9k_flush(struct ieee80211
 440         ath9k_ps_wakeup(sc);
 441         spin_lock_bh(&sc->sc_pcu_lock);
 442         drain_txq = ath_drain_all_txq(sc, false);
 443 +       spin_unlock_bh(&sc->sc_pcu_lock);
 444 +
 445         if (!drain_txq)
 446                 ath_reset(sc, false);
 447 -       spin_unlock_bh(&sc->sc_pcu_lock);
 448 +
 449         ath9k_ps_restore(sc);
 450         ieee80211_wake_queues(hw);
 451