1 files changed, 127 insertions, 52 deletions

diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index 74c2dc8a8b8..3ff0e476c2b 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -18,36 +18,6 @@
 #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;
@@ -121,6 +91,7 @@ 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;
 
 	spin_lock_irqsave(&sc->sc_pm_lock, flags);
@@ -129,18 +100,33 @@ void ath9k_ps_wakeup(struct ath_softc *sc)
 
 	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.
+	 */
+	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 +161,45 @@ 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->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
@@ -251,7 +276,6 @@ int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
 		goto ps_restore;
 	}
 
-	ath_cache_conf_rate(sc, &hw->conf);
 	ath_update_txpow(sc);
 	ath9k_hw_set_interrupts(ah, ah->imask);
 
@@ -399,6 +423,7 @@ void ath_ani_calibrate(unsigned long data)
 	bool aniflag = false;
 	unsigned int timestamp = jiffies_to_msecs(jiffies);
 	u32 cal_interval, short_cal_interval, long_cal_interval;
+	unsigned long flags;
 
 	if (ah->caldata && ah->caldata->nfcal_interference)
 		long_cal_interval = ATH_LONG_CALINTERVAL_INT;
@@ -449,8 +474,12 @@ void ath_ani_calibrate(unsigned long data)
 	/* Skip all processing if there's nothing to do. */
 	if (longcal || shortcal || aniflag) {
 		/* Call ANI routine if necessary */
-		if (aniflag)
+		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);
+		}
 
 		/* Perform calibration if necessary */
 		if (longcal || shortcal) {
@@ -635,6 +664,7 @@ irqreturn_t ath_isr(int irq, void *dev)
 
 	struct ath_softc *sc = dev;
 	struct ath_hw *ah = sc->sc_ah;
+	struct ath_common *common = ath9k_hw_common(ah);
 	enum ath9k_int status;
 	bool sched = false;
 
@@ -684,7 +714,12 @@ irqreturn_t ath_isr(int irq, void *dev)
 
 	if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
 	    (status & ATH9K_INT_BB_WATCHDOG)) {
+
+		spin_lock(&common->cc_lock);
+		ath_hw_cycle_counters_update(common);
 		ar9003_hw_bb_watchdog_dbg_info(ah);
+		spin_unlock(&common->cc_lock);
+
 		goto chip_reset;
 	}
 
@@ -713,7 +748,9 @@ irqreturn_t ath_isr(int irq, void *dev)
 		 * it will clear whatever condition caused
 		 * the interrupt.
 		 */
+		spin_lock(&common->cc_lock);
 		ath9k_hw_proc_mib_event(ah);
+		spin_unlock(&common->cc_lock);
 		ath9k_hw_set_interrupts(ah, ah->imask);
 	}
 
@@ -945,8 +982,6 @@ int ath_reset(struct ath_softc *sc, bool retry_tx)
 	 * 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)))
@@ -1153,8 +1188,6 @@ 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;
 
 	/* Disable BMISS interrupt when we're not associated */
@@ -1522,7 +1555,8 @@ 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;
 
@@ -1588,6 +1622,11 @@ static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
 	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);
@@ -1615,12 +1654,45 @@ static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
 
 		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");
 			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:
@@ -1651,6 +1723,7 @@ skip_chan_change:
 	FIF_PSPOLL |				\
 	FIF_OTHER_BSS |				\
 	FIF_BCN_PRBRESP_PROMISC |		\
+	FIF_PROBE_REQ |				\
 	FIF_FCSFAIL)
 
 /* FIXME: sc->sc_full_reset ? */
@@ -1990,9 +2063,15 @@ 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) {
@@ -2003,21 +2082,17 @@ 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;
 }