diff options
Diffstat (limited to 'sys/dev/ath/ath_hal/ar5416/ar5416_xmit.c')
| -rw-r--r-- | sys/dev/ath/ath_hal/ar5416/ar5416_xmit.c | 71 |
1 files changed, 70 insertions, 1 deletions
diff --git a/sys/dev/ath/ath_hal/ar5416/ar5416_xmit.c b/sys/dev/ath/ath_hal/ar5416/ar5416_xmit.c index 36f968f..945c766 100644 --- a/sys/dev/ath/ath_hal/ar5416/ar5416_xmit.c +++ b/sys/dev/ath/ath_hal/ar5416/ar5416_xmit.c @@ -669,6 +669,26 @@ ar5416GetGlobalTxTimeout(struct ath_hal *ah) return MS(OS_REG_READ(ah, AR_GTXTO), AR_GTXTO_TIMEOUT_LIMIT); } +#define HT_RC_2_MCS(_rc) ((_rc) & 0x0f) +static const u_int8_t baDurationDelta[] = { + 24, // 0: BPSK + 12, // 1: QPSK 1/2 + 12, // 2: QPSK 3/4 + 4, // 3: 16-QAM 1/2 + 4, // 4: 16-QAM 3/4 + 4, // 5: 64-QAM 2/3 + 4, // 6: 64-QAM 3/4 + 4, // 7: 64-QAM 5/6 + 24, // 8: BPSK + 12, // 9: QPSK 1/2 + 12, // 10: QPSK 3/4 + 4, // 11: 16-QAM 1/2 + 4, // 12: 16-QAM 3/4 + 4, // 13: 64-QAM 2/3 + 4, // 14: 64-QAM 3/4 + 4, // 15: 64-QAM 5/6 +}; + void ar5416Set11nRateScenario(struct ath_hal *ah, struct ath_desc *ds, u_int durUpdateEn, u_int rtsctsRate, @@ -740,17 +760,44 @@ ar5416Set11nRateScenario(struct ath_hal *ah, struct ath_desc *ds, | SM(rtsctsRate, AR_RTSCTSRate); } +/* + * Note: this should be called before calling ar5416SetBurstDuration() + * (if it is indeed called) in order to ensure that the burst duration + * is correctly updated with the BA delta workaround. + */ void ar5416Set11nAggrFirst(struct ath_hal *ah, struct ath_desc *ds, u_int aggrLen, u_int numDelims) { struct ar5416_desc *ads = AR5416DESC(ds); + uint32_t flags; + uint32_t burstDur; + uint8_t rate; ads->ds_ctl1 |= (AR_IsAggr | AR_MoreAggr); ads->ds_ctl6 &= ~(AR_AggrLen | AR_PadDelim); ads->ds_ctl6 |= SM(aggrLen, AR_AggrLen); ads->ds_ctl6 |= SM(numDelims, AR_PadDelim); + + if (! AR_SREV_MERLIN_10_OR_LATER(ah)) { + /* + * XXX It'd be nice if I were passed in the rate scenario + * at this point.. + */ + rate = MS(ads->ds_ctl3, AR_XmitRate0); + flags = ads->ds_ctl0 & (AR_CTSEnable | AR_RTSEnable); + /* + * WAR - MAC assumes normal ACK time instead of + * block ACK while computing packet duration. + * Add this delta to the burst duration in the descriptor. + */ + if (flags && (ads->ds_ctl1 & AR_IsAggr)) { + burstDur = baDurationDelta[HT_RC_2_MCS(rate)]; + ads->ds_ctl2 &= ~(AR_BurstDur); + ads->ds_ctl2 |= SM(burstDur, AR_BurstDur); + } + } } void @@ -792,14 +839,36 @@ ar5416Clr11nAggr(struct ath_hal *ah, struct ath_desc *ds) ads->ds_ctl6 &= ~AR_AggrLen; } +/* + * Program the burst duration, with the included BA delta if it's + * applicable. + */ void ar5416Set11nBurstDuration(struct ath_hal *ah, struct ath_desc *ds, u_int burstDuration) { struct ar5416_desc *ads = AR5416DESC(ds); + uint32_t burstDur = 0; + uint8_t rate; + + if (! AR_SREV_MERLIN_10_OR_LATER(ah)) { + /* + * XXX It'd be nice if I were passed in the rate scenario + * at this point.. + */ + rate = MS(ads->ds_ctl3, AR_XmitDataTries0); + /* + * WAR - MAC assumes normal ACK time instead of + * block ACK while computing packet duration. + * Add this delta to the burst duration in the descriptor. + */ + if (ads->ds_ctl1 & AR_IsAggr) { + burstDur = baDurationDelta[HT_RC_2_MCS(rate)]; + } + } ads->ds_ctl2 &= ~AR_BurstDur; - ads->ds_ctl2 |= SM(burstDuration, AR_BurstDur); + ads->ds_ctl2 |= SM(burstDur + burstDuration, AR_BurstDur); } /* |
