From: Sujith Manoharan <c_manoha@xxxxxxxxxxxxxxxx>
The commit "ath9k_hw: improve ANI processing and rx desensitizing parameters"
changed various ANI operational parameters to address a specific
card/environment. This is not really applicable for other cards
in general usage.
As per internal documentation, lowering the immunity level can be
done only after 5 periods have passed and the CCK/OFDM errors are
below the low watermak threshold - which have been fixed at 300 and
400 respectively by the sytems team.
Raising the immunity level can be done when CCK/OFDM errors exceed
600 and 1000 (per second).
Set these values once during attach.
Signed-off-by: Sujith Manoharan <c_manoha@xxxxxxxxxxxxxxxx>
---
drivers/net/wireless/ath/ath9k/ani.c | 29 +++++++++++++++++------------
drivers/net/wireless/ath/ath9k/ani.h | 2 --
2 files changed, 17 insertions(+), 14 deletions(-)
diff --git a/drivers/net/wireless/ath/ath9k/ani.c b/drivers/net/wireless/ath/ath9k/ani.c
index 3ec4c53..1520e55 100644
--- a/drivers/net/wireless/ath/ath9k/ani.c
+++ b/drivers/net/wireless/ath/ath9k/ani.c
@@ -186,14 +186,6 @@ static void ath9k_hw_set_ofdm_nil(struct ath_hw *ah, u8 immunityLevel,
ATH9K_ANI_OFDM_WEAK_SIGNAL_DETECTION,
entry_ofdm->ofdm_weak_signal_on);
}
-
- if (aniState->ofdmNoiseImmunityLevel >= ATH9K_ANI_OFDM_DEF_LEVEL) {
- ah->config.ofdm_trig_high = ATH9K_ANI_OFDM_TRIG_HIGH;
- ah->config.ofdm_trig_low = ATH9K_ANI_OFDM_TRIG_LOW_ABOVE_INI;
- } else {
- ah->config.ofdm_trig_high = ATH9K_ANI_OFDM_TRIG_HIGH_BELOW_INI;
- ah->config.ofdm_trig_low = ATH9K_ANI_OFDM_TRIG_LOW;
- }
}
static void ath9k_hw_ani_ofdm_err_trigger(struct ath_hw *ah)
@@ -439,12 +431,25 @@ void ath9k_hw_ani_monitor(struct ath_hw *ah, struct ath9k_channel *chan)
ofdmPhyErrRate, aniState->cckNoiseImmunityLevel,
cckPhyErrRate, aniState->ofdmsTurn);
- if (aniState->listenTime > ah->aniperiod) {
- if (cckPhyErrRate < ah->config.cck_trig_low &&
- ofdmPhyErrRate < ah->config.ofdm_trig_low) {
+ if (aniState->listenTime > 5 * ah->aniperiod) {
+ /*
+ * Check if we need to lower immunity if
+ * 5 ani_periods have passed.
+ */
+ if (ofdmPhyErrRate <= ah->config.ofdm_trig_low &&
+ cckPhyErrRate <= ah->config.cck_trig_low) {
ath9k_hw_ani_lower_immunity(ah);
aniState->ofdmsTurn = !aniState->ofdmsTurn;
- } else if (ofdmPhyErrRate > ah->config.ofdm_trig_high) {
+ }
+ ath9k_ani_restart(ah);
+ } else if (aniState->listenTime > ah->aniperiod) {
+ /*
+ * Check if immunity has to be raised,
+ * (either OFDM or CCK).
+ */
+ if (ofdmPhyErrRate > ah->config.ofdm_trig_high &&
+ (cckPhyErrRate <= ah->config.cck_trig_high ||
+ aniState->ofdmsTurn)) {
ath9k_hw_ani_ofdm_err_trigger(ah);
aniState->ofdmsTurn = false;
} else if (cckPhyErrRate > ah->config.cck_trig_high) {
diff --git a/drivers/net/wireless/ath/ath9k/ani.h b/drivers/net/wireless/ath/ath9k/ani.h
index 78b9fa9..1088472 100644
--- a/drivers/net/wireless/ath/ath9k/ani.h
+++ b/drivers/net/wireless/ath/ath9k/ani.h
@@ -21,11 +21,9 @@
/* units are errors per second */
#define ATH9K_ANI_OFDM_TRIG_HIGH 3500
-#define ATH9K_ANI_OFDM_TRIG_HIGH_BELOW_INI 1000
/* units are errors per second */
#define ATH9K_ANI_OFDM_TRIG_LOW 400
-#define ATH9K_ANI_OFDM_TRIG_LOW_ABOVE_INI 900
/* units are errors per second */
#define ATH9K_ANI_CCK_TRIG_HIGH 600
--
1.8.3
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