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ath9k: change maximum software retransmission handling

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Instead of limiting a subframe to 10 A-MPDU software transmission attempts,
count hardware retransmissions as well and raise the limit a bit. That way
there will be fewer software retransmission attempts when traffic suffers
from lots of hardware retransmissions.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Felix Fietkau 2011-12-14 22:08:03 +01:00 committed by John W. Linville
parent 1478acb392
commit da647626c7
2 changed files with 13 additions and 4 deletions
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2
drivers/net/wireless/ath/ath9k/ath9k.h
View file

@ -542,7 +542,7 @@ struct ath_ant_comb {
#define DEFAULT_CACHELINE 32
#define ATH_REGCLASSIDS_MAX 10
#define ATH_CABQ_READY_TIME 80 /* % of beacon interval */
#define ATH_MAX_SW_RETRIES 10
#define ATH_MAX_SW_RETRIES 30
#define ATH_CHAN_MAX 255
#define ATH_TXPOWER_MAX 100 /* .5 dBm units */

15
drivers/net/wireless/ath/ath9k/xmit.c
View file

@ -264,14 +264,17 @@ static void ath_tid_drain(struct ath_softc *sc, struct ath_txq *txq,
}
static void ath_tx_set_retry(struct ath_softc *sc, struct ath_txq *txq,
struct sk_buff *skb)
struct sk_buff *skb, int count)
{
struct ath_frame_info *fi = get_frame_info(skb);
struct ath_buf *bf = fi->bf;
struct ieee80211_hdr *hdr;
int prev = fi->retries;
TX_STAT_INC(txq->axq_qnum, a_retries);
if (fi->retries++ > 0)
fi->retries += count;
if (prev > 0)
return;
hdr = (struct ieee80211_hdr *)skb->data;
@ -379,6 +382,7 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
int nframes;
u8 tidno;
bool flush = !!(ts->ts_status & ATH9K_TX_FLUSH);
int i, retries;
skb = bf->bf_mpdu;
hdr = (struct ieee80211_hdr *)skb->data;
@ -387,6 +391,10 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
memcpy(rates, tx_info->control.rates, sizeof(rates));
retries = ts->ts_longretry + 1;
for (i = 0; i < ts->ts_rateindex; i++)
retries += rates[i].count;
rcu_read_lock();
sta = ieee80211_find_sta_by_ifaddr(hw, hdr->addr1, hdr->addr2);
@ -471,7 +479,8 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
txpending = 1;
} else if (fi->retries < ATH_MAX_SW_RETRIES) {
if (txok || !an->sleeping)
ath_tx_set_retry(sc, txq, bf->bf_mpdu);
ath_tx_set_retry(sc, txq, bf->bf_mpdu,
retries);
txpending = 1;
} else {