ath9k: use split rx buffers to get rid of order-1 skb allocations
[linux-flexiantxendom0-natty.git] / drivers / net / wireless / ath / ath9k / main.c
index 360c6f5..97dbc8f 100644 (file)
 #include "ath9k.h"
 #include "btcoex.h"
 
-static void ath_cache_conf_rate(struct ath_softc *sc,
-                               struct ieee80211_conf *conf)
-{
-       switch (conf->channel->band) {
-       case IEEE80211_BAND_2GHZ:
-               if (conf_is_ht20(conf))
-                       sc->cur_rate_mode = ATH9K_MODE_11NG_HT20;
-               else if (conf_is_ht40_minus(conf))
-                       sc->cur_rate_mode = ATH9K_MODE_11NG_HT40MINUS;
-               else if (conf_is_ht40_plus(conf))
-                       sc->cur_rate_mode = ATH9K_MODE_11NG_HT40PLUS;
-               else
-                       sc->cur_rate_mode = ATH9K_MODE_11G;
-               break;
-       case IEEE80211_BAND_5GHZ:
-               if (conf_is_ht20(conf))
-                       sc->cur_rate_mode = ATH9K_MODE_11NA_HT20;
-               else if (conf_is_ht40_minus(conf))
-                       sc->cur_rate_mode = ATH9K_MODE_11NA_HT40MINUS;
-               else if (conf_is_ht40_plus(conf))
-                       sc->cur_rate_mode = ATH9K_MODE_11NA_HT40PLUS;
-               else
-                       sc->cur_rate_mode = ATH9K_MODE_11A;
-               break;
-       default:
-               BUG_ON(1);
-               break;
-       }
-}
-
 static void ath_update_txpow(struct ath_softc *sc)
 {
        struct ath_hw *ah = sc->sc_ah;
 
        if (sc->curtxpow != sc->config.txpowlimit) {
-               ath9k_hw_set_txpowerlimit(ah, sc->config.txpowlimit);
+               ath9k_hw_set_txpowerlimit(ah, sc->config.txpowlimit, false);
                /* read back in case value is clamped */
                sc->curtxpow = ath9k_hw_regulatory(ah)->power_limit;
        }
@@ -121,26 +91,46 @@ bool ath9k_setpower(struct ath_softc *sc, enum ath9k_power_mode mode)
 
 void ath9k_ps_wakeup(struct ath_softc *sc)
 {
+       struct ath_common *common = ath9k_hw_common(sc->sc_ah);
        unsigned long flags;
+       enum ath9k_power_mode power_mode;
 
        spin_lock_irqsave(&sc->sc_pm_lock, flags);
        if (++sc->ps_usecount != 1)
                goto unlock;
 
+       power_mode = sc->sc_ah->power_mode;
        ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
 
+       /*
+        * While the hardware is asleep, the cycle counters contain no
+        * useful data. Better clear them now so that they don't mess up
+        * survey data results.
+        */
+       if (power_mode != ATH9K_PM_AWAKE) {
+               spin_lock(&common->cc_lock);
+               ath_hw_cycle_counters_update(common);
+               memset(&common->cc_survey, 0, sizeof(common->cc_survey));
+               spin_unlock(&common->cc_lock);
+       }
+
  unlock:
        spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 }
 
 void ath9k_ps_restore(struct ath_softc *sc)
 {
+       struct ath_common *common = ath9k_hw_common(sc->sc_ah);
        unsigned long flags;
 
        spin_lock_irqsave(&sc->sc_pm_lock, flags);
        if (--sc->ps_usecount != 0)
                goto unlock;
 
+       spin_lock(&common->cc_lock);
+       ath_hw_cycle_counters_update(common);
+       spin_unlock(&common->cc_lock);
+
        if (sc->ps_idle)
                ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_FULL_SLEEP);
        else if (sc->ps_enabled &&
@@ -175,6 +165,48 @@ static void ath_start_ani(struct ath_common *common)
                        msecs_to_jiffies((u32)ah->config.ani_poll_interval));
 }
 
+static void ath_update_survey_nf(struct ath_softc *sc, int channel)
+{
+       struct ath_hw *ah = sc->sc_ah;
+       struct ath9k_channel *chan = &ah->channels[channel];
+       struct survey_info *survey = &sc->survey[channel];
+
+       if (chan->noisefloor) {
+               survey->filled |= SURVEY_INFO_NOISE_DBM;
+               survey->noise = chan->noisefloor;
+       }
+}
+
+static void ath_update_survey_stats(struct ath_softc *sc)
+{
+       struct ath_hw *ah = sc->sc_ah;
+       struct ath_common *common = ath9k_hw_common(ah);
+       int pos = ah->curchan - &ah->channels[0];
+       struct survey_info *survey = &sc->survey[pos];
+       struct ath_cycle_counters *cc = &common->cc_survey;
+       unsigned int div = common->clockrate * 1000;
+
+       if (!ah->curchan)
+               return;
+
+       if (ah->power_mode == ATH9K_PM_AWAKE)
+               ath_hw_cycle_counters_update(common);
+
+       if (cc->cycles > 0) {
+               survey->filled |= SURVEY_INFO_CHANNEL_TIME |
+                       SURVEY_INFO_CHANNEL_TIME_BUSY |
+                       SURVEY_INFO_CHANNEL_TIME_RX |
+                       SURVEY_INFO_CHANNEL_TIME_TX;
+               survey->channel_time += cc->cycles / div;
+               survey->channel_time_busy += cc->rx_busy / div;
+               survey->channel_time_rx += cc->rx_frame / div;
+               survey->channel_time_tx += cc->tx_frame / div;
+       }
+       memset(cc, 0, sizeof(*cc));
+
+       ath_update_survey_nf(sc, pos);
+}
+
 /*
  * Set/change channels.  If the channel is really being changed, it's done
  * by reseting the chip.  To accomplish this we must first cleanup any pending
@@ -202,6 +234,8 @@ int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
 
        ath9k_ps_wakeup(sc);
 
+       spin_lock_bh(&sc->sc_pcu_lock);
+
        /*
         * This is only performed if the channel settings have
         * actually changed.
@@ -211,9 +245,11 @@ int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
         * hardware at the new frequency, and then re-enable
         * the relevant bits of the h/w.
         */
-       ath9k_hw_set_interrupts(ah, 0);
-       ath_drain_all_txq(sc, false);
-       stopped = ath_stoprecv(sc);
+       ath9k_hw_disable_interrupts(ah);
+       stopped = ath_drain_all_txq(sc, false);
+
+       if (!ath_stoprecv(sc))
+               stopped = false;
 
        /* XXX: do not flush receive queue here. We don't want
         * to flush data frames already in queue because of
@@ -225,43 +261,39 @@ int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
        if (!(sc->sc_flags & SC_OP_OFFCHANNEL))
                caldata = &aphy->caldata;
 
-       ath_print(common, ATH_DBG_CONFIG,
-                 "(%u MHz) -> (%u MHz), conf_is_ht40: %d fastcc: %d\n",
-                 sc->sc_ah->curchan->channel,
-                 channel->center_freq, conf_is_ht40(conf),
-                 fastcc);
-
-       spin_lock_bh(&sc->sc_resetlock);
+       ath_dbg(common, ATH_DBG_CONFIG,
+               "(%u MHz) -> (%u MHz), conf_is_ht40: %d fastcc: %d\n",
+               sc->sc_ah->curchan->channel,
+               channel->center_freq, conf_is_ht40(conf),
+               fastcc);
 
        r = ath9k_hw_reset(ah, hchan, caldata, fastcc);
        if (r) {
-               ath_print(common, ATH_DBG_FATAL,
-                         "Unable to reset channel (%u MHz), "
-                         "reset status %d\n",
-                         channel->center_freq, r);
-               spin_unlock_bh(&sc->sc_resetlock);
+               ath_err(common,
+                       "Unable to reset channel (%u MHz), reset status %d\n",
+                       channel->center_freq, r);
                goto ps_restore;
        }
-       spin_unlock_bh(&sc->sc_resetlock);
 
        if (ath_startrecv(sc) != 0) {
-               ath_print(common, ATH_DBG_FATAL,
-                         "Unable to restart recv logic\n");
+               ath_err(common, "Unable to restart recv logic\n");
                r = -EIO;
                goto ps_restore;
        }
 
-       ath_cache_conf_rate(sc, &hw->conf);
        ath_update_txpow(sc);
        ath9k_hw_set_interrupts(ah, ah->imask);
 
        if (!(sc->sc_flags & (SC_OP_OFFCHANNEL))) {
-               ath_beacon_config(sc, NULL);
+               if (sc->sc_flags & SC_OP_BEACONS)
+                       ath_beacon_config(sc, NULL);
                ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
                ath_start_ani(common);
        }
 
  ps_restore:
+       spin_unlock_bh(&sc->sc_pcu_lock);
+
        ath9k_ps_restore(sc);
        return r;
 }
@@ -289,6 +321,46 @@ static void ath_paprd_activate(struct ath_softc *sc)
        ath9k_ps_restore(sc);
 }
 
+static bool ath_paprd_send_frame(struct ath_softc *sc, struct sk_buff *skb, int chain)
+{
+       struct ieee80211_hw *hw = sc->hw;
+       struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
+       struct ath_hw *ah = sc->sc_ah;
+       struct ath_common *common = ath9k_hw_common(ah);
+       struct ath_tx_control txctl;
+       int time_left;
+
+       memset(&txctl, 0, sizeof(txctl));
+       txctl.txq = sc->tx.txq_map[WME_AC_BE];
+
+       memset(tx_info, 0, sizeof(*tx_info));
+       tx_info->band = hw->conf.channel->band;
+       tx_info->flags |= IEEE80211_TX_CTL_NO_ACK;
+       tx_info->control.rates[0].idx = 0;
+       tx_info->control.rates[0].count = 1;
+       tx_info->control.rates[0].flags = IEEE80211_TX_RC_MCS;
+       tx_info->control.rates[1].idx = -1;
+
+       init_completion(&sc->paprd_complete);
+       txctl.paprd = BIT(chain);
+
+       if (ath_tx_start(hw, skb, &txctl) != 0) {
+               ath_dbg(common, ATH_DBG_XMIT, "PAPRD TX failed\n");
+               dev_kfree_skb_any(skb);
+               return false;
+       }
+
+       time_left = wait_for_completion_timeout(&sc->paprd_complete,
+                       msecs_to_jiffies(ATH_PAPRD_TIMEOUT));
+
+       if (!time_left)
+               ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_CALIBRATE,
+                       "Timeout waiting for paprd training on TX chain %d\n",
+                       chain);
+
+       return !!time_left;
+}
+
 void ath_paprd_calibrate(struct work_struct *work)
 {
        struct ath_softc *sc = container_of(work, struct ath_softc, paprd_work);
@@ -296,28 +368,23 @@ void ath_paprd_calibrate(struct work_struct *work)
        struct ath_hw *ah = sc->sc_ah;
        struct ieee80211_hdr *hdr;
        struct sk_buff *skb = NULL;
-       struct ieee80211_tx_info *tx_info;
-       int band = hw->conf.channel->band;
-       struct ieee80211_supported_band *sband = &sc->sbands[band];
-       struct ath_tx_control txctl;
        struct ath9k_hw_cal_data *caldata = ah->caldata;
        struct ath_common *common = ath9k_hw_common(ah);
-       int qnum, ftype;
+       int ftype;
        int chain_ok = 0;
        int chain;
        int len = 1800;
-       int time_left;
-       int i;
 
        if (!caldata)
                return;
 
+       if (ar9003_paprd_init_table(ah) < 0)
+               return;
+
        skb = alloc_skb(len, GFP_KERNEL);
        if (!skb)
                return;
 
-       tx_info = IEEE80211_SKB_CB(skb);
-
        skb_put(skb, len);
        memset(skb->data, 0, len);
        hdr = (struct ieee80211_hdr *)skb->data;
@@ -328,40 +395,25 @@ void ath_paprd_calibrate(struct work_struct *work)
        memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN);
        memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN);
 
-       memset(&txctl, 0, sizeof(txctl));
-       qnum = sc->tx.hwq_map[WME_AC_BE];
-       txctl.txq = &sc->tx.txq[qnum];
-
        ath9k_ps_wakeup(sc);
-       ar9003_paprd_init_table(ah);
        for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
                if (!(common->tx_chainmask & BIT(chain)))
                        continue;
 
                chain_ok = 0;
-               memset(tx_info, 0, sizeof(*tx_info));
-               tx_info->band = band;
 
-               for (i = 0; i < 4; i++) {
-                       tx_info->control.rates[i].idx = sband->n_bitrates - 1;
-                       tx_info->control.rates[i].count = 6;
-               }
+               ath_dbg(common, ATH_DBG_CALIBRATE,
+                       "Sending PAPRD frame for thermal measurement "
+                       "on chain %d\n", chain);
+               if (!ath_paprd_send_frame(sc, skb, chain))
+                       goto fail_paprd;
 
-               init_completion(&sc->paprd_complete);
                ar9003_paprd_setup_gain_table(ah, chain);
-               txctl.paprd = BIT(chain);
-               if (ath_tx_start(hw, skb, &txctl) != 0)
-                       break;
 
-               time_left = wait_for_completion_timeout(&sc->paprd_complete,
-                               msecs_to_jiffies(ATH_PAPRD_TIMEOUT));
-               if (!time_left) {
-                       ath_print(ath9k_hw_common(ah), ATH_DBG_CALIBRATE,
-                                 "Timeout waiting for paprd training on "
-                                 "TX chain %d\n",
-                                 chain);
+               ath_dbg(common, ATH_DBG_CALIBRATE,
+                       "Sending PAPRD training frame on chain %d\n", chain);
+               if (!ath_paprd_send_frame(sc, skb, chain))
                        goto fail_paprd;
-               }
 
                if (!ar9003_paprd_is_done(ah))
                        break;
@@ -418,7 +470,7 @@ void ath_ani_calibrate(unsigned long data)
        /* Long calibration runs independently of short calibration. */
        if ((timestamp - common->ani.longcal_timer) >= long_cal_interval) {
                longcal = true;
-               ath_print(common, ATH_DBG_ANI, "longcal @%lu\n", jiffies);
+               ath_dbg(common, ATH_DBG_ANI, "longcal @%lu\n", jiffies);
                common->ani.longcal_timer = timestamp;
        }
 
@@ -426,8 +478,8 @@ void ath_ani_calibrate(unsigned long data)
        if (!common->ani.caldone) {
                if ((timestamp - common->ani.shortcal_timer) >= short_cal_interval) {
                        shortcal = true;
-                       ath_print(common, ATH_DBG_ANI,
-                                 "shortcal @%lu\n", jiffies);
+                       ath_dbg(common, ATH_DBG_ANI,
+                               "shortcal @%lu\n", jiffies);
                        common->ani.shortcal_timer = timestamp;
                        common->ani.resetcal_timer = timestamp;
                }
@@ -453,6 +505,7 @@ void ath_ani_calibrate(unsigned long data)
                if (aniflag) {
                        spin_lock_irqsave(&common->cc_lock, flags);
                        ath9k_hw_ani_monitor(ah, ah->curchan);
+                       ath_update_survey_stats(sc);
                        spin_unlock_irqrestore(&common->cc_lock, flags);
                }
 
@@ -485,49 +538,25 @@ set_timer:
        if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_PAPRD) && ah->caldata) {
                if (!ah->caldata->paprd_done)
                        ieee80211_queue_work(sc->hw, &sc->paprd_work);
-               else
+               else if (!ah->paprd_table_write_done)
                        ath_paprd_activate(sc);
        }
 }
 
-/*
- * Update tx/rx chainmask. For legacy association,
- * hard code chainmask to 1x1, for 11n association, use
- * the chainmask configuration, for bt coexistence, use
- * the chainmask configuration even in legacy mode.
- */
-void ath_update_chainmask(struct ath_softc *sc, int is_ht)
-{
-       struct ath_hw *ah = sc->sc_ah;
-       struct ath_common *common = ath9k_hw_common(ah);
-
-       if ((sc->sc_flags & SC_OP_OFFCHANNEL) || is_ht ||
-           (ah->btcoex_hw.scheme != ATH_BTCOEX_CFG_NONE)) {
-               common->tx_chainmask = ah->caps.tx_chainmask;
-               common->rx_chainmask = ah->caps.rx_chainmask;
-       } else {
-               common->tx_chainmask = 1;
-               common->rx_chainmask = 1;
-       }
-
-       ath_print(common, ATH_DBG_CONFIG,
-                 "tx chmask: %d, rx chmask: %d\n",
-                 common->tx_chainmask,
-                 common->rx_chainmask);
-}
-
 static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta)
 {
        struct ath_node *an;
-
+       struct ath_hw *ah = sc->sc_ah;
        an = (struct ath_node *)sta->drv_priv;
 
+       if ((ah->caps.hw_caps) & ATH9K_HW_CAP_APM)
+               sc->sc_flags |= SC_OP_ENABLE_APM;
+
        if (sc->sc_flags & SC_OP_TXAGGR) {
                ath_tx_node_init(sc, an);
                an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR +
                                     sta->ht_cap.ampdu_factor);
                an->mpdudensity = parse_mpdudensity(sta->ht_cap.ampdu_density);
-               an->last_rssi = ATH_RSSI_DUMMY_MARKER;
        }
 }
 
@@ -552,7 +581,7 @@ void ath_hw_check(struct work_struct *work)
 
                msleep(1);
        }
-       ath_reset(sc, false);
+       ath_reset(sc, true);
 
 out:
        ath9k_ps_restore(sc);
@@ -567,14 +596,14 @@ void ath9k_tasklet(unsigned long data)
        u32 status = sc->intrstatus;
        u32 rxmask;
 
-       ath9k_ps_wakeup(sc);
-
        if (status & ATH9K_INT_FATAL) {
-               ath_reset(sc, false);
-               ath9k_ps_restore(sc);
+               ath_reset(sc, true);
                return;
        }
 
+       ath9k_ps_wakeup(sc);
+       spin_lock(&sc->sc_pcu_lock);
+
        if (!ath9k_hw_check_alive(ah))
                ieee80211_queue_work(sc->hw, &sc->hw_check_work);
 
@@ -585,15 +614,12 @@ void ath9k_tasklet(unsigned long data)
                rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
 
        if (status & rxmask) {
-               spin_lock_bh(&sc->rx.rxflushlock);
-
                /* Check for high priority Rx first */
                if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
                    (status & ATH9K_INT_RXHP))
                        ath_rx_tasklet(sc, 0, true);
 
                ath_rx_tasklet(sc, 0, false);
-               spin_unlock_bh(&sc->rx.rxflushlock);
        }
 
        if (status & ATH9K_INT_TX) {
@@ -608,8 +634,8 @@ void ath9k_tasklet(unsigned long data)
                 * TSF sync does not look correct; remain awake to sync with
                 * the next Beacon.
                 */
-               ath_print(common, ATH_DBG_PS,
-                         "TSFOOR - Sync with next Beacon\n");
+               ath_dbg(common, ATH_DBG_PS,
+                       "TSFOOR - Sync with next Beacon\n");
                sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC;
        }
 
@@ -618,7 +644,9 @@ void ath9k_tasklet(unsigned long data)
                        ath_gen_timer_isr(sc->sc_ah);
 
        /* re-enable hardware interrupt */
-       ath9k_hw_set_interrupts(ah, ah->imask);
+       ath9k_hw_enable_interrupts(ah);
+
+       spin_unlock(&sc->sc_pcu_lock);
        ath9k_ps_restore(sc);
 }
 
@@ -717,18 +745,22 @@ irqreturn_t ath_isr(int irq, void *dev)
                 * interrupt; otherwise it will continue to
                 * fire.
                 */
-               ath9k_hw_set_interrupts(ah, 0);
+               ath9k_hw_disable_interrupts(ah);
                /*
                 * Let the hal handle the event. We assume
                 * it will clear whatever condition caused
                 * the interrupt.
                 */
+               spin_lock(&common->cc_lock);
                ath9k_hw_proc_mib_event(ah);
-               ath9k_hw_set_interrupts(ah, ah->imask);
+               spin_unlock(&common->cc_lock);
+               ath9k_hw_enable_interrupts(ah);
        }
 
        if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
                if (status & ATH9K_INT_TIM_TIMER) {
+                       if (ATH_DBG_WARN_ON_ONCE(sc->ps_idle))
+                               goto chip_reset;
                        /* Clear RxAbort bit so that we can
                         * receive frames */
                        ath9k_setpower(sc, ATH9K_PM_AWAKE);
@@ -741,8 +773,8 @@ chip_reset:
        ath_debug_stat_interrupt(sc, status);
 
        if (sched) {
-               /* turn off every interrupt except SWBA */
-               ath9k_hw_set_interrupts(ah, (ah->imask & ATH9K_INT_SWBA));
+               /* turn off every interrupt */
+               ath9k_hw_disable_interrupts(ah);
                tasklet_schedule(&sc->intr_tq);
        }
 
@@ -794,16 +826,18 @@ static u32 ath_get_extchanmode(struct ath_softc *sc,
 }
 
 static void ath9k_bss_assoc_info(struct ath_softc *sc,
+                                struct ieee80211_hw *hw,
                                 struct ieee80211_vif *vif,
                                 struct ieee80211_bss_conf *bss_conf)
 {
+       struct ath_wiphy *aphy = hw->priv;
        struct ath_hw *ah = sc->sc_ah;
        struct ath_common *common = ath9k_hw_common(ah);
 
        if (bss_conf->assoc) {
-               ath_print(common, ATH_DBG_CONFIG,
-                         "Bss Info ASSOC %d, bssid: %pM\n",
-                          bss_conf->aid, common->curbssid);
+               ath_dbg(common, ATH_DBG_CONFIG,
+                       "Bss Info ASSOC %d, bssid: %pM\n",
+                       bss_conf->aid, common->curbssid);
 
                /* New association, store aid */
                common->curaid = bss_conf->aid;
@@ -820,12 +854,13 @@ static void ath9k_bss_assoc_info(struct ath_softc *sc,
                ath_beacon_config(sc, vif);
 
                /* Reset rssi stats */
+               aphy->last_rssi = ATH_RSSI_DUMMY_MARKER;
                sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
 
                sc->sc_flags |= SC_OP_ANI_RUN;
                ath_start_ani(common);
        } else {
-               ath_print(common, ATH_DBG_CONFIG, "Bss Info DISASSOC\n");
+               ath_dbg(common, ATH_DBG_CONFIG, "Bss Info DISASSOC\n");
                common->curaid = 0;
                /* Stop ANI */
                sc->sc_flags &= ~SC_OP_ANI_RUN;
@@ -841,28 +876,25 @@ void ath_radio_enable(struct ath_softc *sc, struct ieee80211_hw *hw)
        int r;
 
        ath9k_ps_wakeup(sc);
+       spin_lock_bh(&sc->sc_pcu_lock);
+
        ath9k_hw_configpcipowersave(ah, 0, 0);
 
        if (!ah->curchan)
                ah->curchan = ath_get_curchannel(sc, sc->hw);
 
-       spin_lock_bh(&sc->sc_resetlock);
        r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
        if (r) {
-               ath_print(common, ATH_DBG_FATAL,
-                         "Unable to reset channel (%u MHz), "
-                         "reset status %d\n",
-                         channel->center_freq, r);
+               ath_err(common,
+                       "Unable to reset channel (%u MHz), reset status %d\n",
+                       channel->center_freq, r);
        }
-       spin_unlock_bh(&sc->sc_resetlock);
 
        ath_update_txpow(sc);
        if (ath_startrecv(sc) != 0) {
-               ath_print(common, ATH_DBG_FATAL,
-                         "Unable to restart recv logic\n");
-               return;
+               ath_err(common, "Unable to restart recv logic\n");
+               goto out;
        }
-
        if (sc->sc_flags & SC_OP_BEACONS)
                ath_beacon_config(sc, NULL);    /* restart beacons */
 
@@ -875,6 +907,9 @@ void ath_radio_enable(struct ath_softc *sc, struct ieee80211_hw *hw)
        ath9k_hw_set_gpio(ah, ah->led_pin, 0);
 
        ieee80211_wake_queues(hw);
+out:
+       spin_unlock_bh(&sc->sc_pcu_lock);
+
        ath9k_ps_restore(sc);
 }
 
@@ -885,6 +920,8 @@ void ath_radio_disable(struct ath_softc *sc, struct ieee80211_hw *hw)
        int r;
 
        ath9k_ps_wakeup(sc);
+       spin_lock_bh(&sc->sc_pcu_lock);
+
        ieee80211_stop_queues(hw);
 
        /*
@@ -897,29 +934,29 @@ void ath_radio_disable(struct ath_softc *sc, struct ieee80211_hw *hw)
        }
 
        /* Disable interrupts */
-       ath9k_hw_set_interrupts(ah, 0);
+       ath9k_hw_disable_interrupts(ah);
 
        ath_drain_all_txq(sc, false);   /* clear pending tx frames */
+
        ath_stoprecv(sc);               /* turn off frame recv */
        ath_flushrecv(sc);              /* flush recv queue */
 
        if (!ah->curchan)
                ah->curchan = ath_get_curchannel(sc, hw);
 
-       spin_lock_bh(&sc->sc_resetlock);
        r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
        if (r) {
-               ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL,
-                         "Unable to reset channel (%u MHz), "
-                         "reset status %d\n",
-                         channel->center_freq, r);
+               ath_err(ath9k_hw_common(sc->sc_ah),
+                       "Unable to reset channel (%u MHz), reset status %d\n",
+                       channel->center_freq, r);
        }
-       spin_unlock_bh(&sc->sc_resetlock);
 
        ath9k_hw_phy_disable(ah);
+
        ath9k_hw_configpcipowersave(ah, 1, 1);
+
+       spin_unlock_bh(&sc->sc_pcu_lock);
        ath9k_ps_restore(sc);
-       ath9k_setpower(sc, ATH9K_PM_FULL_SLEEP);
 }
 
 int ath_reset(struct ath_softc *sc, bool retry_tx)
@@ -932,31 +969,30 @@ int ath_reset(struct ath_softc *sc, bool retry_tx)
        /* Stop ANI */
        del_timer_sync(&common->ani.timer);
 
+       ath9k_ps_wakeup(sc);
+       spin_lock_bh(&sc->sc_pcu_lock);
+
        ieee80211_stop_queues(hw);
 
-       ath9k_hw_set_interrupts(ah, 0);
+       ath9k_hw_disable_interrupts(ah);
        ath_drain_all_txq(sc, retry_tx);
+
        ath_stoprecv(sc);
        ath_flushrecv(sc);
 
-       spin_lock_bh(&sc->sc_resetlock);
        r = ath9k_hw_reset(ah, sc->sc_ah->curchan, ah->caldata, false);
        if (r)
-               ath_print(common, ATH_DBG_FATAL,
-                         "Unable to reset hardware; reset status %d\n", r);
-       spin_unlock_bh(&sc->sc_resetlock);
+               ath_err(common,
+                       "Unable to reset hardware; reset status %d\n", r);
 
        if (ath_startrecv(sc) != 0)
-               ath_print(common, ATH_DBG_FATAL,
-                         "Unable to start recv logic\n");
+               ath_err(common, "Unable to start recv logic\n");
 
        /*
         * We may be doing a reset in response to a request
         * that changes the channel so update any state that
         * might change as a result.
         */
-       ath_cache_conf_rate(sc, &hw->conf);
-
        ath_update_txpow(sc);
 
        if ((sc->sc_flags & SC_OP_BEACONS) || !(sc->sc_flags & (SC_OP_OFFCHANNEL)))
@@ -976,63 +1012,15 @@ int ath_reset(struct ath_softc *sc, bool retry_tx)
        }
 
        ieee80211_wake_queues(hw);
+       spin_unlock_bh(&sc->sc_pcu_lock);
 
        /* Start ANI */
        ath_start_ani(common);
+       ath9k_ps_restore(sc);
 
        return r;
 }
 
-static int ath_get_hal_qnum(u16 queue, struct ath_softc *sc)
-{
-       int qnum;
-
-       switch (queue) {
-       case 0:
-               qnum = sc->tx.hwq_map[WME_AC_VO];
-               break;
-       case 1:
-               qnum = sc->tx.hwq_map[WME_AC_VI];
-               break;
-       case 2:
-               qnum = sc->tx.hwq_map[WME_AC_BE];
-               break;
-       case 3:
-               qnum = sc->tx.hwq_map[WME_AC_BK];
-               break;
-       default:
-               qnum = sc->tx.hwq_map[WME_AC_BE];
-               break;
-       }
-
-       return qnum;
-}
-
-int ath_get_mac80211_qnum(u32 queue, struct ath_softc *sc)
-{
-       int qnum;
-
-       switch (queue) {
-       case WME_AC_VO:
-               qnum = 0;
-               break;
-       case WME_AC_VI:
-               qnum = 1;
-               break;
-       case WME_AC_BE:
-               qnum = 2;
-               break;
-       case WME_AC_BK:
-               qnum = 3;
-               break;
-       default:
-               qnum = -1;
-               break;
-       }
-
-       return qnum;
-}
-
 /* XXX: Remove me once we don't depend on ath9k_channel for all
  * this redundant data */
 void ath9k_update_ichannel(struct ath_softc *sc, struct ieee80211_hw *hw,
@@ -1071,9 +1059,11 @@ static int ath9k_start(struct ieee80211_hw *hw)
        struct ath9k_channel *init_channel;
        int r;
 
-       ath_print(common, ATH_DBG_CONFIG,
-                 "Starting driver with initial channel: %d MHz\n",
-                 curchan->center_freq);
+       ath_dbg(common, ATH_DBG_CONFIG,
+               "Starting driver with initial channel: %d MHz\n",
+               curchan->center_freq);
+
+       ath9k_ps_wakeup(sc);
 
        mutex_lock(&sc->mutex);
 
@@ -1114,17 +1104,15 @@ static int ath9k_start(struct ieee80211_hw *hw)
         * be followed by initialization of the appropriate bits
         * and then setup of the interrupt mask.
         */
-       spin_lock_bh(&sc->sc_resetlock);
+       spin_lock_bh(&sc->sc_pcu_lock);
        r = ath9k_hw_reset(ah, init_channel, ah->caldata, false);
        if (r) {
-               ath_print(common, ATH_DBG_FATAL,
-                         "Unable to reset hardware; reset status %d "
-                         "(freq %u MHz)\n", r,
-                         curchan->center_freq);
-               spin_unlock_bh(&sc->sc_resetlock);
+               ath_err(common,
+                       "Unable to reset hardware; reset status %d (freq %u MHz)\n",
+                       r, curchan->center_freq);
+               spin_unlock_bh(&sc->sc_pcu_lock);
                goto mutex_unlock;
        }
-       spin_unlock_bh(&sc->sc_resetlock);
 
        /*
         * This is needed only to setup initial state
@@ -1140,11 +1128,12 @@ static int ath9k_start(struct ieee80211_hw *hw)
         * here except setup the interrupt mask.
         */
        if (ath_startrecv(sc) != 0) {
-               ath_print(common, ATH_DBG_FATAL,
-                         "Unable to start recv logic\n");
+               ath_err(common, "Unable to start recv logic\n");
                r = -EIO;
+               spin_unlock_bh(&sc->sc_pcu_lock);
                goto mutex_unlock;
        }
+       spin_unlock_bh(&sc->sc_pcu_lock);
 
        /* Setup our intr mask. */
        ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL |
@@ -1163,9 +1152,8 @@ static int ath9k_start(struct ieee80211_hw *hw)
        if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
                ah->imask |= ATH9K_INT_CST;
 
-       ath_cache_conf_rate(sc, &hw->conf);
-
        sc->sc_flags &= ~SC_OP_INVALID;
+       sc->sc_ah->is_monitoring = false;
 
        /* Disable BMISS interrupt when we're not associated */
        ah->imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
@@ -1187,28 +1175,30 @@ static int ath9k_start(struct ieee80211_hw *hw)
                        ath9k_btcoex_timer_resume(sc);
        }
 
+       if (ah->caps.pcie_lcr_extsync_en && common->bus_ops->extn_synch_en)
+               common->bus_ops->extn_synch_en(common);
+
 mutex_unlock:
        mutex_unlock(&sc->mutex);
 
+       ath9k_ps_restore(sc);
+
        return r;
 }
 
 static int ath9k_tx(struct ieee80211_hw *hw,
                    struct sk_buff *skb)
 {
-       struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
        struct ath_wiphy *aphy = hw->priv;
        struct ath_softc *sc = aphy->sc;
        struct ath_common *common = ath9k_hw_common(sc->sc_ah);
        struct ath_tx_control txctl;
-       int padpos, padsize;
        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
-       int qnum;
 
        if (aphy->state != ATH_WIPHY_ACTIVE && aphy->state != ATH_WIPHY_SCAN) {
-               ath_print(common, ATH_DBG_XMIT,
-                         "ath9k: %s: TX in unexpected wiphy state "
-                         "%d\n", wiphy_name(hw->wiphy), aphy->state);
+               ath_dbg(common, ATH_DBG_XMIT,
+                       "ath9k: %s: TX in unexpected wiphy state %d\n",
+                       wiphy_name(hw->wiphy), aphy->state);
                goto exit;
        }
 
@@ -1220,8 +1210,8 @@ static int ath9k_tx(struct ieee80211_hw *hw,
                if (ieee80211_is_data(hdr->frame_control) &&
                    !ieee80211_is_nullfunc(hdr->frame_control) &&
                    !ieee80211_has_pm(hdr->frame_control)) {
-                       ath_print(common, ATH_DBG_PS, "Add PM=1 for a TX frame "
-                                 "while in PS mode\n");
+                       ath_dbg(common, ATH_DBG_PS,
+                               "Add PM=1 for a TX frame while in PS mode\n");
                        hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
                }
        }
@@ -1236,12 +1226,12 @@ static int ath9k_tx(struct ieee80211_hw *hw,
                if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
                        ath9k_hw_setrxabort(sc->sc_ah, 0);
                if (ieee80211_is_pspoll(hdr->frame_control)) {
-                       ath_print(common, ATH_DBG_PS,
-                                 "Sending PS-Poll to pick a buffered frame\n");
+                       ath_dbg(common, ATH_DBG_PS,
+                               "Sending PS-Poll to pick a buffered frame\n");
                        sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA;
                } else {
-                       ath_print(common, ATH_DBG_PS,
-                                 "Wake up to complete TX\n");
+                       ath_dbg(common, ATH_DBG_PS,
+                               "Wake up to complete TX\n");
                        sc->ps_flags |= PS_WAIT_FOR_TX_ACK;
                }
                /*
@@ -1253,36 +1243,12 @@ static int ath9k_tx(struct ieee80211_hw *hw,
        }
 
        memset(&txctl, 0, sizeof(struct ath_tx_control));
+       txctl.txq = sc->tx.txq_map[skb_get_queue_mapping(skb)];
 
-       /*
-        * As a temporary workaround, assign seq# here; this will likely need
-        * to be cleaned up to work better with Beacon transmission and virtual
-        * BSSes.
-        */
-       if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
-               if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
-                       sc->tx.seq_no += 0x10;
-               hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
-               hdr->seq_ctrl |= cpu_to_le16(sc->tx.seq_no);
-       }
-
-       /* Add the padding after the header if this is not already done */
-       padpos = ath9k_cmn_padpos(hdr->frame_control);
-       padsize = padpos & 3;
-       if (padsize && skb->len>padpos) {
-               if (skb_headroom(skb) < padsize)
-                       return -1;
-               skb_push(skb, padsize);
-               memmove(skb->data, skb->data + padsize, padpos);
-       }
-
-       qnum = ath_get_hal_qnum(skb_get_queue_mapping(skb), sc);
-       txctl.txq = &sc->tx.txq[qnum];
-
-       ath_print(common, ATH_DBG_XMIT, "transmitting packet, skb: %p\n", skb);
+       ath_dbg(common, ATH_DBG_XMIT, "transmitting packet, skb: %p\n", skb);
 
        if (ath_tx_start(hw, skb, &txctl) != 0) {
-               ath_print(common, ATH_DBG_XMIT, "TX failed\n");
+               ath_dbg(common, ATH_DBG_XMIT, "TX failed\n");
                goto exit;
        }
 
@@ -1322,7 +1288,7 @@ static void ath9k_stop(struct ieee80211_hw *hw)
        }
 
        if (sc->sc_flags & SC_OP_INVALID) {
-               ath_print(common, ATH_DBG_ANY, "Device not present\n");
+               ath_dbg(common, ATH_DBG_ANY, "Device not present\n");
                mutex_unlock(&sc->mutex);
                return;
        }
@@ -1341,9 +1307,14 @@ static void ath9k_stop(struct ieee80211_hw *hw)
                        ath9k_btcoex_timer_pause(sc);
        }
 
+       spin_lock_bh(&sc->sc_pcu_lock);
+
+       /* prevent tasklets to enable interrupts once we disable them */
+       ah->imask &= ~ATH9K_INT_GLOBAL;
+
        /* make sure h/w will not generate any interrupt
         * before setting the invalid flag. */
-       ath9k_hw_set_interrupts(ah, 0);
+       ath9k_hw_disable_interrupts(ah);
 
        if (!(sc->sc_flags & SC_OP_INVALID)) {
                ath_drain_all_txq(sc, false);
@@ -1352,19 +1323,34 @@ static void ath9k_stop(struct ieee80211_hw *hw)
        } else
                sc->rx.rxlink = NULL;
 
+       if (sc->rx.frag) {
+               dev_kfree_skb_any(sc->rx.frag);
+               sc->rx.frag = NULL;
+       }
+
        /* disable HAL and put h/w to sleep */
        ath9k_hw_disable(ah);
        ath9k_hw_configpcipowersave(ah, 1, 1);
+
+       spin_unlock_bh(&sc->sc_pcu_lock);
+
+       /* we can now sync irq and kill any running tasklets, since we already
+        * disabled interrupts and not holding a spin lock */
+       synchronize_irq(sc->irq);
+       tasklet_kill(&sc->intr_tq);
+       tasklet_kill(&sc->bcon_tasklet);
+
        ath9k_ps_restore(sc);
 
-       /* Finally, put the chip in FULL SLEEP mode */
-       ath9k_setpower(sc, ATH9K_PM_FULL_SLEEP);
+       sc->ps_idle = true;
+       ath9k_set_wiphy_idle(aphy, true);
+       ath_radio_disable(sc, hw);
 
        sc->sc_flags |= SC_OP_INVALID;
 
        mutex_unlock(&sc->mutex);
 
-       ath_print(common, ATH_DBG_CONFIG, "Driver halt\n");
+       ath_dbg(common, ATH_DBG_CONFIG, "Driver halt\n");
 }
 
 static int ath9k_add_interface(struct ieee80211_hw *hw,
@@ -1397,14 +1383,14 @@ static int ath9k_add_interface(struct ieee80211_hw *hw,
                ic_opmode = vif->type;
                break;
        default:
-               ath_print(common, ATH_DBG_FATAL,
-                       "Interface type %d not yet supported\n", vif->type);
+               ath_err(common, "Interface type %d not yet supported\n",
+                       vif->type);
                ret = -EOPNOTSUPP;
                goto out;
        }
 
-       ath_print(common, ATH_DBG_CONFIG,
-                 "Attach a VIF of type: %d\n", ic_opmode);
+       ath_dbg(common, ATH_DBG_CONFIG,
+               "Attach a VIF of type: %d\n", ic_opmode);
 
        /* Set the VIF opmode */
        avp->av_opmode = ic_opmode;
@@ -1440,8 +1426,7 @@ static int ath9k_add_interface(struct ieee80211_hw *hw,
        ath9k_hw_set_interrupts(ah, ah->imask);
 
        if (vif->type == NL80211_IFTYPE_AP    ||
-           vif->type == NL80211_IFTYPE_ADHOC ||
-           vif->type == NL80211_IFTYPE_MONITOR) {
+           vif->type == NL80211_IFTYPE_ADHOC) {
                sc->sc_flags |= SC_OP_ANI_RUN;
                ath_start_ani(common);
        }
@@ -1451,16 +1436,83 @@ out:
        return ret;
 }
 
+static void ath9k_reclaim_beacon(struct ath_softc *sc,
+                                struct ieee80211_vif *vif)
+{
+       struct ath_vif *avp = (void *)vif->drv_priv;
+
+       /* Disable SWBA interrupt */
+       sc->sc_ah->imask &= ~ATH9K_INT_SWBA;
+       ath9k_ps_wakeup(sc);
+       ath9k_hw_set_interrupts(sc->sc_ah, sc->sc_ah->imask);
+       ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
+       tasklet_kill(&sc->bcon_tasklet);
+       ath9k_ps_restore(sc);
+
+       ath_beacon_return(sc, avp);
+       sc->sc_flags &= ~SC_OP_BEACONS;
+
+       if (sc->nbcnvifs > 0) {
+               /* Re-enable beaconing */
+               sc->sc_ah->imask |= ATH9K_INT_SWBA;
+               ath9k_ps_wakeup(sc);
+               ath9k_hw_set_interrupts(sc->sc_ah, sc->sc_ah->imask);
+               ath9k_ps_restore(sc);
+       }
+}
+
+static int ath9k_change_interface(struct ieee80211_hw *hw,
+                                 struct ieee80211_vif *vif,
+                                 enum nl80211_iftype new_type,
+                                 bool p2p)
+{
+       struct ath_wiphy *aphy = hw->priv;
+       struct ath_softc *sc = aphy->sc;
+       struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+       int ret = 0;
+
+       ath_dbg(common, ATH_DBG_CONFIG, "Change Interface\n");
+       mutex_lock(&sc->mutex);
+
+       switch (new_type) {
+       case NL80211_IFTYPE_AP:
+       case NL80211_IFTYPE_ADHOC:
+               if (sc->nbcnvifs >= ATH_BCBUF) {
+                       ath_err(common, "No beacon slot available\n");
+                       ret = -ENOBUFS;
+                       goto out;
+               }
+               break;
+       case NL80211_IFTYPE_STATION:
+               /* Stop ANI */
+               sc->sc_flags &= ~SC_OP_ANI_RUN;
+               del_timer_sync(&common->ani.timer);
+               if ((vif->type == NL80211_IFTYPE_AP) ||
+                   (vif->type == NL80211_IFTYPE_ADHOC))
+                       ath9k_reclaim_beacon(sc, vif);
+               break;
+       default:
+               ath_err(common, "Interface type %d not yet supported\n",
+                               vif->type);
+               ret = -ENOTSUPP;
+               goto out;
+       }
+       vif->type = new_type;
+       vif->p2p = p2p;
+
+out:
+       mutex_unlock(&sc->mutex);
+       return ret;
+}
+
 static void ath9k_remove_interface(struct ieee80211_hw *hw,
                                   struct ieee80211_vif *vif)
 {
        struct ath_wiphy *aphy = hw->priv;
        struct ath_softc *sc = aphy->sc;
        struct ath_common *common = ath9k_hw_common(sc->sc_ah);
-       struct ath_vif *avp = (void *)vif->drv_priv;
-       int i;
 
-       ath_print(common, ATH_DBG_CONFIG, "Detach Interface\n");
+       ath_dbg(common, ATH_DBG_CONFIG, "Detach Interface\n");
 
        mutex_lock(&sc->mutex);
 
@@ -1471,23 +1523,8 @@ static void ath9k_remove_interface(struct ieee80211_hw *hw,
        /* Reclaim beacon resources */
        if ((sc->sc_ah->opmode == NL80211_IFTYPE_AP) ||
            (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC) ||
-           (sc->sc_ah->opmode == NL80211_IFTYPE_MESH_POINT)) {
-               ath9k_ps_wakeup(sc);
-               ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
-               ath9k_ps_restore(sc);
-       }
-
-       ath_beacon_return(sc, avp);
-       sc->sc_flags &= ~SC_OP_BEACONS;
-
-       for (i = 0; i < ARRAY_SIZE(sc->beacon.bslot); i++) {
-               if (sc->beacon.bslot[i] == vif) {
-                       printk(KERN_DEBUG "%s: vif had allocated beacon "
-                              "slot\n", __func__);
-                       sc->beacon.bslot[i] = NULL;
-                       sc->beacon.bslot_aphy[i] = NULL;
-               }
-       }
+           (sc->sc_ah->opmode == NL80211_IFTYPE_MESH_POINT))
+               ath9k_reclaim_beacon(sc, vif);
 
        sc->nvifs--;
 
@@ -1532,7 +1569,8 @@ static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
 {
        struct ath_wiphy *aphy = hw->priv;
        struct ath_softc *sc = aphy->sc;
-       struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+       struct ath_hw *ah = sc->sc_ah;
+       struct ath_common *common = ath9k_hw_common(ah);
        struct ieee80211_conf *conf = &hw->conf;
        bool disable_radio;
 
@@ -1566,8 +1604,8 @@ static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
                if (enable_radio) {
                        sc->ps_idle = false;
                        ath_radio_enable(sc, hw);
-                       ath_print(common, ATH_DBG_CONFIG,
-                                 "not-idle: enabling radio\n");
+                       ath_dbg(common, ATH_DBG_CONFIG,
+                               "not-idle: enabling radio\n");
                }
        }
 
@@ -1589,15 +1627,24 @@ static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
 
        if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
                if (conf->flags & IEEE80211_CONF_MONITOR) {
-                       ath_print(common, ATH_DBG_CONFIG,
-                                 "HW opmode set to Monitor mode\n");
-                       sc->sc_ah->opmode = NL80211_IFTYPE_MONITOR;
+                       ath_dbg(common, ATH_DBG_CONFIG,
+                               "Monitor mode is enabled\n");
+                       sc->sc_ah->is_monitoring = true;
+               } else {
+                       ath_dbg(common, ATH_DBG_CONFIG,
+                               "Monitor mode is disabled\n");
+                       sc->sc_ah->is_monitoring = false;
                }
        }
 
        if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
                struct ieee80211_channel *curchan = hw->conf.channel;
                int pos = curchan->hw_value;
+               int old_pos = -1;
+               unsigned long flags;
+
+               if (ah->curchan)
+                       old_pos = ah->curchan - &ah->channels[0];
 
                aphy->chan_idx = pos;
                aphy->chan_is_ht = conf_is_ht(conf);
@@ -1617,26 +1664,58 @@ static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
                        goto skip_chan_change;
                }
 
-               ath_print(common, ATH_DBG_CONFIG, "Set channel: %d MHz\n",
-                         curchan->center_freq);
+               ath_dbg(common, ATH_DBG_CONFIG, "Set channel: %d MHz\n",
+                       curchan->center_freq);
 
                /* XXX: remove me eventualy */
                ath9k_update_ichannel(sc, hw, &sc->sc_ah->channels[pos]);
 
-               ath_update_chainmask(sc, conf_is_ht(conf));
+               /* update survey stats for the old channel before switching */
+               spin_lock_irqsave(&common->cc_lock, flags);
+               ath_update_survey_stats(sc);
+               spin_unlock_irqrestore(&common->cc_lock, flags);
+
+               /*
+                * If the operating channel changes, change the survey in-use flags
+                * along with it.
+                * Reset the survey data for the new channel, unless we're switching
+                * back to the operating channel from an off-channel operation.
+                */
+               if (!(hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) &&
+                   sc->cur_survey != &sc->survey[pos]) {
+
+                       if (sc->cur_survey)
+                               sc->cur_survey->filled &= ~SURVEY_INFO_IN_USE;
+
+                       sc->cur_survey = &sc->survey[pos];
+
+                       memset(sc->cur_survey, 0, sizeof(struct survey_info));
+                       sc->cur_survey->filled |= SURVEY_INFO_IN_USE;
+               } else if (!(sc->survey[pos].filled & SURVEY_INFO_IN_USE)) {
+                       memset(&sc->survey[pos], 0, sizeof(struct survey_info));
+               }
 
                if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) {
-                       ath_print(common, ATH_DBG_FATAL,
-                                 "Unable to set channel\n");
+                       ath_err(common, "Unable to set channel\n");
                        mutex_unlock(&sc->mutex);
                        return -EINVAL;
                }
+
+               /*
+                * The most recent snapshot of channel->noisefloor for the old
+                * channel is only available after the hardware reset. Copy it to
+                * the survey stats now.
+                */
+               if (old_pos >= 0)
+                       ath_update_survey_nf(sc, old_pos);
        }
 
 skip_chan_change:
        if (changed & IEEE80211_CONF_CHANGE_POWER) {
                sc->config.txpowlimit = 2 * conf->power_level;
+               ath9k_ps_wakeup(sc);
                ath_update_txpow(sc);
+               ath9k_ps_restore(sc);
        }
 
        spin_lock_bh(&sc->wiphy_lock);
@@ -1644,7 +1723,7 @@ skip_chan_change:
        spin_unlock_bh(&sc->wiphy_lock);
 
        if (disable_radio) {
-               ath_print(common, ATH_DBG_CONFIG, "idle: disabling radio\n");
+               ath_dbg(common, ATH_DBG_CONFIG, "idle: disabling radio\n");
                sc->ps_idle = true;
                ath_radio_disable(sc, hw);
        }
@@ -1661,6 +1740,7 @@ skip_chan_change:
        FIF_PSPOLL |                            \
        FIF_OTHER_BSS |                         \
        FIF_BCN_PRBRESP_PROMISC |               \
+       FIF_PROBE_REQ |                         \
        FIF_FCSFAIL)
 
 /* FIXME: sc->sc_full_reset ? */
@@ -1682,8 +1762,8 @@ static void ath9k_configure_filter(struct ieee80211_hw *hw,
        ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
        ath9k_ps_restore(sc);
 
-       ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_CONFIG,
-                 "Set HW RX filter: 0x%x\n", rfilt);
+       ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_CONFIG,
+               "Set HW RX filter: 0x%x\n", rfilt);
 }
 
 static int ath9k_sta_add(struct ieee80211_hw *hw,
@@ -1716,12 +1796,15 @@ static int ath9k_conf_tx(struct ieee80211_hw *hw, u16 queue,
        struct ath_wiphy *aphy = hw->priv;
        struct ath_softc *sc = aphy->sc;
        struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+       struct ath_txq *txq;
        struct ath9k_tx_queue_info qi;
-       int ret = 0, qnum;
+       int ret = 0;
 
        if (queue >= WME_NUM_AC)
                return 0;
 
+       txq = sc->tx.txq_map[queue];
+
        mutex_lock(&sc->mutex);
 
        memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
@@ -1730,20 +1813,18 @@ static int ath9k_conf_tx(struct ieee80211_hw *hw, u16 queue,
        qi.tqi_cwmin = params->cw_min;
        qi.tqi_cwmax = params->cw_max;
        qi.tqi_burstTime = params->txop;
-       qnum = ath_get_hal_qnum(queue, sc);
 
-       ath_print(common, ATH_DBG_CONFIG,
-                 "Configure tx [queue/halq] [%d/%d],  "
-                 "aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
-                 queue, qnum, params->aifs, params->cw_min,
-                 params->cw_max, params->txop);
+       ath_dbg(common, ATH_DBG_CONFIG,
+               "Configure tx [queue/halq] [%d/%d], aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
+               queue, txq->axq_qnum, params->aifs, params->cw_min,
+               params->cw_max, params->txop);
 
-       ret = ath_txq_update(sc, qnum, &qi);
+       ret = ath_txq_update(sc, txq->axq_qnum, &qi);
        if (ret)
-               ath_print(common, ATH_DBG_FATAL, "TXQ Update failed\n");
+               ath_err(common, "TXQ Update failed\n");
 
        if (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC)
-               if ((qnum == sc->tx.hwq_map[WME_AC_BE]) && !ret)
+               if (queue == WME_AC_BE && !ret)
                        ath_beaconq_config(sc);
 
        mutex_unlock(&sc->mutex);
@@ -1762,12 +1843,12 @@ static int ath9k_set_key(struct ieee80211_hw *hw,
        struct ath_common *common = ath9k_hw_common(sc->sc_ah);
        int ret = 0;
 
-       if (modparam_nohwcrypt)
+       if (ath9k_modparam_nohwcrypt)
                return -ENOSPC;
 
        mutex_lock(&sc->mutex);
        ath9k_ps_wakeup(sc);
-       ath_print(common, ATH_DBG_CONFIG, "Set HW Key\n");
+       ath_dbg(common, ATH_DBG_CONFIG, "Set HW Key\n");
 
        switch (cmd) {
        case SET_KEY:
@@ -1822,13 +1903,8 @@ static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
                /* Set aggregation protection mode parameters */
                sc->config.ath_aggr_prot = 0;
 
-               /* Only legacy IBSS for now */
-               if (vif->type == NL80211_IFTYPE_ADHOC)
-                       ath_update_chainmask(sc, 0);
-
-               ath_print(common, ATH_DBG_CONFIG,
-                         "BSSID: %pM aid: 0x%x\n",
-                         common->curbssid, common->curaid);
+               ath_dbg(common, ATH_DBG_CONFIG, "BSSID: %pM aid: 0x%x\n",
+                       common->curbssid, common->curaid);
 
                /* need to reconfigure the beacon */
                sc->sc_flags &= ~SC_OP_BEACONS ;
@@ -1884,8 +1960,8 @@ static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
        }
 
        if (changed & BSS_CHANGED_ERP_PREAMBLE) {
-               ath_print(common, ATH_DBG_CONFIG, "BSS Changed PREAMBLE %d\n",
-                         bss_conf->use_short_preamble);
+               ath_dbg(common, ATH_DBG_CONFIG, "BSS Changed PREAMBLE %d\n",
+                       bss_conf->use_short_preamble);
                if (bss_conf->use_short_preamble)
                        sc->sc_flags |= SC_OP_PREAMBLE_SHORT;
                else
@@ -1893,8 +1969,8 @@ static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
        }
 
        if (changed & BSS_CHANGED_ERP_CTS_PROT) {
-               ath_print(common, ATH_DBG_CONFIG, "BSS Changed CTS PROT %d\n",
-                         bss_conf->use_cts_prot);
+               ath_dbg(common, ATH_DBG_CONFIG, "BSS Changed CTS PROT %d\n",
+                       bss_conf->use_cts_prot);
                if (bss_conf->use_cts_prot &&
                    hw->conf.channel->band != IEEE80211_BAND_5GHZ)
                        sc->sc_flags |= SC_OP_PROTECT_ENABLE;
@@ -1903,9 +1979,9 @@ static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
        }
 
        if (changed & BSS_CHANGED_ASSOC) {
-               ath_print(common, ATH_DBG_CONFIG, "BSS Changed ASSOC %d\n",
+               ath_dbg(common, ATH_DBG_CONFIG, "BSS Changed ASSOC %d\n",
                        bss_conf->assoc);
-               ath9k_bss_assoc_info(sc, vif, bss_conf);
+               ath9k_bss_assoc_info(sc, hw, vif, bss_conf);
        }
 
        mutex_unlock(&sc->mutex);
@@ -1918,7 +1994,9 @@ static u64 ath9k_get_tsf(struct ieee80211_hw *hw)
        struct ath_softc *sc = aphy->sc;
 
        mutex_lock(&sc->mutex);
+       ath9k_ps_wakeup(sc);
        tsf = ath9k_hw_gettsf64(sc->sc_ah);
+       ath9k_ps_restore(sc);
        mutex_unlock(&sc->mutex);
 
        return tsf;
@@ -1930,7 +2008,9 @@ static void ath9k_set_tsf(struct ieee80211_hw *hw, u64 tsf)
        struct ath_softc *sc = aphy->sc;
 
        mutex_lock(&sc->mutex);
+       ath9k_ps_wakeup(sc);
        ath9k_hw_settsf64(sc->sc_ah, tsf);
+       ath9k_ps_restore(sc);
        mutex_unlock(&sc->mutex);
 }
 
@@ -1968,6 +2048,9 @@ static int ath9k_ampdu_action(struct ieee80211_hw *hw,
        case IEEE80211_AMPDU_RX_STOP:
                break;
        case IEEE80211_AMPDU_TX_START:
+               if (!(sc->sc_flags & SC_OP_TXAGGR))
+                       return -EOPNOTSUPP;
+
                ath9k_ps_wakeup(sc);
                ret = ath_tx_aggr_start(sc, sta, tid, ssn);
                if (!ret)
@@ -1986,8 +2069,7 @@ static int ath9k_ampdu_action(struct ieee80211_hw *hw,
                ath9k_ps_restore(sc);
                break;
        default:
-               ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL,
-                         "Unknown AMPDU action\n");
+               ath_err(ath9k_hw_common(sc->sc_ah), "Unknown AMPDU action\n");
        }
 
        local_bh_enable();
@@ -2000,9 +2082,15 @@ static int ath9k_get_survey(struct ieee80211_hw *hw, int idx,
 {
        struct ath_wiphy *aphy = hw->priv;
        struct ath_softc *sc = aphy->sc;
-       struct ath_hw *ah = sc->sc_ah;
+       struct ath_common *common = ath9k_hw_common(sc->sc_ah);
        struct ieee80211_supported_band *sband;
-       struct ath9k_channel *chan;
+       struct ieee80211_channel *chan;
+       unsigned long flags;
+       int pos;
+
+       spin_lock_irqsave(&common->cc_lock, flags);
+       if (idx == 0)
+               ath_update_survey_stats(sc);
 
        sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ];
        if (sband && idx >= sband->n_channels) {
@@ -2013,21 +2101,17 @@ static int ath9k_get_survey(struct ieee80211_hw *hw, int idx,
        if (!sband)
                sband = hw->wiphy->bands[IEEE80211_BAND_5GHZ];
 
-       if (!sband || idx >= sband->n_channels)
-           return -ENOENT;
-
-       survey->channel = &sband->channels[idx];
-       chan = &ah->channels[survey->channel->hw_value];
-       survey->filled = 0;
-
-       if (chan == ah->curchan)
-               survey->filled |= SURVEY_INFO_IN_USE;
-
-       if (chan->noisefloor) {
-               survey->filled |= SURVEY_INFO_NOISE_DBM;
-               survey->noise = chan->noisefloor;
+       if (!sband || idx >= sband->n_channels) {
+               spin_unlock_irqrestore(&common->cc_lock, flags);
+               return -ENOENT;
        }
 
+       chan = &sband->channels[idx];
+       pos = chan->hw_value;
+       memcpy(survey, &sc->survey[pos], sizeof(*survey));
+       survey->channel = chan;
+       spin_unlock_irqrestore(&common->cc_lock, flags);
+
        return 0;
 }
 
@@ -2085,6 +2169,7 @@ struct ieee80211_ops ath9k_ops = {
        .start              = ath9k_start,
        .stop               = ath9k_stop,
        .add_interface      = ath9k_add_interface,
+       .change_interface   = ath9k_change_interface,
        .remove_interface   = ath9k_remove_interface,
        .config             = ath9k_config,
        .configure_filter   = ath9k_configure_filter,