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--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -594,6 +594,8 @@ struct ath_softc {
struct delayed_work wiphy_work;
unsigned long wiphy_scheduler_int;
int wiphy_scheduler_index;
+ struct survey_info *cur_survey;
+ struct survey_info survey[ATH9K_NUM_CHANNELS];
struct tasklet_struct intr_tq;
struct tasklet_struct bcon_tasklet;
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -176,6 +176,49 @@ static void ath_start_ani(struct ath_com
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 long flags;
+ unsigned int div = common->clockrate * 1000;
+
+ spin_lock_irqsave(&common->cc_lock, flags);
+
+ 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);
+
+ spin_unlock_irqrestore(&common->cc_lock, flags);
+}
+
/*
* 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
@@ -1533,7 +1576,8 @@ static int ath9k_config(struct ieee80211
{
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;
@@ -1599,6 +1643,10 @@ static int ath9k_config(struct ieee80211
if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
struct ieee80211_channel *curchan = hw->conf.channel;
int pos = curchan->hw_value;
+ int old_pos = -1;
+
+ if (ah->curchan)
+ old_pos = ah->curchan - &ah->channels[0];
aphy->chan_idx = pos;
aphy->chan_is_ht = conf_is_ht(conf);
@@ -1626,12 +1674,43 @@ static int ath9k_config(struct ieee80211
ath_update_chainmask(sc, conf_is_ht(conf));
+ /* update survey stats for the old channel before switching */
+ ath_update_survey_stats(sc);
+
+ /*
+ * 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:
@@ -2001,9 +2080,12 @@ static int ath9k_get_survey(struct ieee8
{
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
- struct ath_hw *ah = sc->sc_ah;
struct ieee80211_supported_band *sband;
- struct ath9k_channel *chan;
+ struct ieee80211_channel *chan;
+ int pos;
+
+ if (idx == 0)
+ ath_update_survey_stats(sc);
sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ];
if (sband && idx >= sband->n_channels) {
@@ -2017,17 +2099,10 @@ static int ath9k_get_survey(struct ieee8
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;
- }
+ chan = &sband->channels[idx];
+ pos = chan->hw_value;
+ memcpy(survey, &sc->survey[pos], sizeof(*survey));
+ survey->channel = chan;
return 0;
}
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