diff options
Diffstat (limited to 'sys/dev/ath/ath_hal/ar5416/ar5416_beacon.c')
| -rw-r--r-- | sys/dev/ath/ath_hal/ar5416/ar5416_beacon.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/sys/dev/ath/ath_hal/ar5416/ar5416_beacon.c b/sys/dev/ath/ath_hal/ar5416/ar5416_beacon.c index e2bf6c7..6691c11 100644 --- a/sys/dev/ath/ath_hal/ar5416/ar5416_beacon.c +++ b/sys/dev/ath/ath_hal/ar5416/ar5416_beacon.c @@ -197,6 +197,25 @@ ar5416SetStaBeaconTimers(struct ath_hal *ah, const HAL_BEACON_STATE *bs) * beacon jitter; cab timeout is max time to wait for cab * after seeing the last DTIM or MORE CAB bit */ + +/* + * I've bumped these to 30TU for now. + * + * Some APs (AR933x/AR934x?) in 2GHz especially seem to not always + * transmit beacon frames at exactly the right times and with it set + * to 10TU, the NIC starts not waking up at the right times to hear + * these slightly-larger-jitering beacons. It also never recovers + * from that (it doesn't resync? I'm not sure.) + * + * So for now bump this to 30TU. Ideally we'd cap this based on + * the beacon interval so the sum of CAB+BEACON timeouts never + * exceeded the beacon interval. + * + * Now, since we're doing all the math in the ath(4) driver in TU + * rather than TSF, we may be seeing the result of dumb rounding + * errors causing the jitter to actually be a much bigger problem. + * I'll have to investigate that with a fine tooth comb. + */ #define CAB_TIMEOUT_VAL 10 /* in TU */ #define BEACON_TIMEOUT_VAL 10 /* in TU */ #define SLEEP_SLOP 3 /* in TU */ @@ -248,6 +267,13 @@ ar5416SetStaBeaconTimers(struct ath_hal *ah, const HAL_BEACON_STATE *bs) OS_REG_SET_BIT(ah, AR_TIMER_MODE, AR_TIMER_MODE_TBTT | AR_TIMER_MODE_TIM | AR_TIMER_MODE_DTIM); + +#define HAL_TSFOOR_THRESHOLD 0x00004240 /* TSF OOR threshold (16k us) */ + + /* TSF out of range threshold */ +// OS_REG_WRITE(ah, AR_TSFOOR_THRESHOLD, bs->bs_tsfoor_threshold); + OS_REG_WRITE(ah, AR_TSFOOR_THRESHOLD, HAL_TSFOOR_THRESHOLD); + HALDEBUG(ah, HAL_DEBUG_BEACON, "%s: next DTIM %d\n", __func__, bs->bs_nextdtim); HALDEBUG(ah, HAL_DEBUG_BEACON, "%s: next beacon %d\n", |
