mirror of https://github.com/hak5/openwrt.git
130 lines
4.2 KiB
Diff
130 lines
4.2 KiB
Diff
--- a/drivers/net/wireless/ath/ath9k/beacon.c
|
|
+++ b/drivers/net/wireless/ath/ath9k/beacon.c
|
|
@@ -362,6 +362,7 @@ void ath_beacon_tasklet(unsigned long da
|
|
ath_print(common, ATH_DBG_BSTUCK,
|
|
"missed %u consecutive beacons\n",
|
|
sc->beacon.bmisscnt);
|
|
+ ath9k_hw_bstuck_nfcal(ah);
|
|
} else if (sc->beacon.bmisscnt >= BSTUCK_THRESH) {
|
|
ath_print(common, ATH_DBG_BSTUCK,
|
|
"beacon is officially stuck\n");
|
|
--- a/drivers/net/wireless/ath/ath9k/calib.c
|
|
+++ b/drivers/net/wireless/ath/ath9k/calib.c
|
|
@@ -65,12 +65,16 @@ static s16 ath9k_hw_get_default_nf(struc
|
|
|
|
|
|
static void ath9k_hw_update_nfcal_hist_buffer(struct ath_hw *ah,
|
|
- struct ath9k_nfcal_hist *h,
|
|
+ struct ath9k_hw_cal_data *cal,
|
|
int16_t *nfarray)
|
|
{
|
|
+ struct ath_common *common = ath9k_hw_common(ah);
|
|
struct ath_nf_limits *limit;
|
|
+ struct ath9k_nfcal_hist *h;
|
|
+ bool high_nf_mid = false;
|
|
int i;
|
|
|
|
+ h = cal->nfCalHist;
|
|
limit = ath9k_hw_get_nf_limits(ah, ah->curchan);
|
|
|
|
for (i = 0; i < NUM_NF_READINGS; i++) {
|
|
@@ -87,9 +91,38 @@ static void ath9k_hw_update_nfcal_hist_b
|
|
ath9k_hw_get_nf_hist_mid(h[i].nfCalBuffer);
|
|
}
|
|
|
|
- if (h[i].privNF > limit->max)
|
|
- h[i].privNF = limit->max;
|
|
+ if (!h[i].privNF)
|
|
+ continue;
|
|
+
|
|
+ if (h[i].privNF > limit->max) {
|
|
+ high_nf_mid = true;
|
|
+
|
|
+ ath_print(common, ATH_DBG_CALIBRATE,
|
|
+ "NFmid[%d] (%d) > MAX (%d), %s\n",
|
|
+ i, h[i].privNF, limit->max,
|
|
+ (cal->nfcal_interference ?
|
|
+ "not corrected (due to interference)" :
|
|
+ "correcting to MAX"));
|
|
+
|
|
+ /*
|
|
+ * Normally we limit the average noise floor by the
|
|
+ * hardware specific maximum here. However if we have
|
|
+ * encountered stuck beacons because of interference,
|
|
+ * we bypass this limit here in order to better deal
|
|
+ * with our environment.
|
|
+ */
|
|
+ if (!cal->nfcal_interference)
|
|
+ h[i].privNF = limit->max;
|
|
+ }
|
|
}
|
|
+
|
|
+ /*
|
|
+ * If the noise floor seems normal for all chains, assume that
|
|
+ * there is no significant interference in the environment anymore.
|
|
+ * Re-enable the enforcement of the NF maximum again.
|
|
+ */
|
|
+ if (!high_nf_mid)
|
|
+ cal->nfcal_interference = false;
|
|
}
|
|
|
|
static bool ath9k_hw_get_nf_thresh(struct ath_hw *ah,
|
|
@@ -339,7 +372,7 @@ bool ath9k_hw_getnf(struct ath_hw *ah, s
|
|
|
|
h = caldata->nfCalHist;
|
|
caldata->nfcal_pending = false;
|
|
- ath9k_hw_update_nfcal_hist_buffer(ah, h, nfarray);
|
|
+ ath9k_hw_update_nfcal_hist_buffer(ah, caldata, nfarray);
|
|
caldata->rawNoiseFloor = h[0].privNF;
|
|
return true;
|
|
}
|
|
@@ -374,3 +407,28 @@ s16 ath9k_hw_getchan_noise(struct ath_hw
|
|
return ah->caldata->rawNoiseFloor;
|
|
}
|
|
EXPORT_SYMBOL(ath9k_hw_getchan_noise);
|
|
+
|
|
+void ath9k_hw_bstuck_nfcal(struct ath_hw *ah)
|
|
+{
|
|
+ struct ath9k_hw_cal_data *caldata = ah->caldata;
|
|
+
|
|
+ if (unlikely(!caldata))
|
|
+ return;
|
|
+
|
|
+ /*
|
|
+ * If beacons are stuck, the most likely cause is interference.
|
|
+ * Triggering a noise floor calibration at this point helps the
|
|
+ * hardware adapt to a noisy environment much faster.
|
|
+ * To ensure that we recover from stuck beacons quickly, let
|
|
+ * the baseband update the internal NF value itself, similar to
|
|
+ * what is being done after a full reset.
|
|
+ */
|
|
+ if (!caldata->nfcal_pending)
|
|
+ ath9k_hw_start_nfcal(ah, true);
|
|
+ else if (!(REG_READ(ah, AR_PHY_AGC_CONTROL) & AR_PHY_AGC_CONTROL_NF))
|
|
+ ath9k_hw_getnf(ah, ah->curchan);
|
|
+
|
|
+ caldata->nfcal_interference = true;
|
|
+}
|
|
+EXPORT_SYMBOL(ath9k_hw_bstuck_nfcal);
|
|
+
|
|
--- a/drivers/net/wireless/ath/ath9k/calib.h
|
|
+++ b/drivers/net/wireless/ath/ath9k/calib.h
|
|
@@ -113,6 +113,7 @@ void ath9k_hw_loadnf(struct ath_hw *ah,
|
|
bool ath9k_hw_getnf(struct ath_hw *ah, struct ath9k_channel *chan);
|
|
void ath9k_init_nfcal_hist_buffer(struct ath_hw *ah,
|
|
struct ath9k_channel *chan);
|
|
+void ath9k_hw_bstuck_nfcal(struct ath_hw *ah);
|
|
s16 ath9k_hw_getchan_noise(struct ath_hw *ah, struct ath9k_channel *chan);
|
|
void ath9k_hw_reset_calibration(struct ath_hw *ah,
|
|
struct ath9k_cal_list *currCal);
|
|
--- a/drivers/net/wireless/ath/ath9k/hw.h
|
|
+++ b/drivers/net/wireless/ath/ath9k/hw.h
|
|
@@ -355,6 +355,7 @@ struct ath9k_hw_cal_data {
|
|
int16_t rawNoiseFloor;
|
|
bool paprd_done;
|
|
bool nfcal_pending;
|
|
+ bool nfcal_interference;
|
|
u16 small_signal_gain[AR9300_MAX_CHAINS];
|
|
u32 pa_table[AR9300_MAX_CHAINS][PAPRD_TABLE_SZ];
|
|
struct ath9k_nfcal_hist nfCalHist[NUM_NF_READINGS];
|