diff options
| author | Felix Fietkau <nbd@openwrt.org> | 2013-05-23 12:20:56 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2013-05-24 12:50:22 -0400 |
| commit | 86c157b3f83597e11d8f03a9dece98d1e77a8ce7 (patch) | |
| tree | 039443b1f2fae511c5735e55f3b2aebfdf59eb82 /drivers/net/wireless/ath/ath9k/hw.c | |
| parent | a37a99102e4573145aa60a2f78a690cc8def027c (diff) | |
ath9k_hw: improve performance for AR934x v1.3+
AR934x v1.3 no longer needs the DCU backoff reduction workaround for
preventing rx overruns, but in turn needs the number of usable Tx
buffers to be reduced slightly.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/hw.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/hw.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c index 01e97ce438b..15dfefcf2d0 100644 --- a/drivers/net/wireless/ath/ath9k/hw.c +++ b/drivers/net/wireless/ath/ath9k/hw.c @@ -1172,6 +1172,7 @@ u32 ath9k_regd_get_ctl(struct ath_regulatory *reg, struct ath9k_channel *chan) static inline void ath9k_hw_set_dma(struct ath_hw *ah) { struct ath_common *common = ath9k_hw_common(ah); + int txbuf_size; ENABLE_REGWRITE_BUFFER(ah); @@ -1225,13 +1226,17 @@ static inline void ath9k_hw_set_dma(struct ath_hw *ah) * So set the usable tx buf size also to half to * avoid data/delimiter underruns */ - REG_WRITE(ah, AR_PCU_TXBUF_CTRL, - AR_9285_PCU_TXBUF_CTRL_USABLE_SIZE); - } else if (!AR_SREV_9271(ah)) { - REG_WRITE(ah, AR_PCU_TXBUF_CTRL, - AR_PCU_TXBUF_CTRL_USABLE_SIZE); + txbuf_size = AR_9285_PCU_TXBUF_CTRL_USABLE_SIZE; + } else if (AR_SREV_9340_13_OR_LATER(ah)) { + /* Uses fewer entries for AR934x v1.3+ to prevent rx overruns */ + txbuf_size = AR_9340_PCU_TXBUF_CTRL_USABLE_SIZE; + } else { + txbuf_size = AR_PCU_TXBUF_CTRL_USABLE_SIZE; } + if (!AR_SREV_9271(ah)) + REG_WRITE(ah, AR_PCU_TXBUF_CTRL, txbuf_size); + REGWRITE_BUFFER_FLUSH(ah); if (AR_SREV_9300_20_OR_LATER(ah)) |