From e7174f44b7eea60ed661cb27c00ddf034208dac8 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Thu, 4 Aug 2011 00:35:12 +0000 Subject: ath9k: rework handling of sending BlockAckReq frames, should hopefully lead to fewer latency spikes SVN-Revision: 27888 --- .../mac80211/patches/571-ath9k_send_bar_fix.patch | 149 +++++++++++++++++++++ 1 file changed, 149 insertions(+) create mode 100644 package/mac80211/patches/571-ath9k_send_bar_fix.patch (limited to 'package/mac80211/patches/571-ath9k_send_bar_fix.patch') diff --git a/package/mac80211/patches/571-ath9k_send_bar_fix.patch b/package/mac80211/patches/571-ath9k_send_bar_fix.patch new file mode 100644 index 0000000..eed9d21 --- /dev/null +++ b/package/mac80211/patches/571-ath9k_send_bar_fix.patch @@ -0,0 +1,149 @@ +--- a/drivers/net/wireless/ath/ath9k/ath9k.h ++++ b/drivers/net/wireless/ath/ath9k/ath9k.h +@@ -275,7 +275,6 @@ struct ath_tx_control { + + #define ATH_TX_ERROR 0x01 + #define ATH_TX_XRETRY 0x02 +-#define ATH_TX_BAR 0x04 + + /** + * @txq_map: Index is mac80211 queue number. This is +--- a/drivers/net/wireless/ath/ath9k/main.c ++++ b/drivers/net/wireless/ath/ath9k/main.c +@@ -1801,6 +1801,7 @@ static int ath9k_sta_add(struct ieee8021 + struct ieee80211_key_conf ps_key = { }; + + ath_node_attach(sc, sta); ++ an->vif = vif; + + if (vif->type != NL80211_IFTYPE_AP && + vif->type != NL80211_IFTYPE_AP_VLAN) +--- a/drivers/net/wireless/ath/ath9k/xmit.c ++++ b/drivers/net/wireless/ath/ath9k/xmit.c +@@ -51,7 +51,7 @@ static void ath_tx_send_normal(struct at + struct list_head *bf_head); + static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf, + struct ath_txq *txq, struct list_head *bf_q, +- struct ath_tx_status *ts, int txok, int sendbar); ++ struct ath_tx_status *ts, int txok); + static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq, + struct list_head *head, bool internal); + static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf, int len); +@@ -166,7 +166,7 @@ static void ath_tx_flush_tid(struct ath_ + fi = get_frame_info(bf->bf_mpdu); + if (fi->retries) { + ath_tx_update_baw(sc, tid, fi->seqno); +- ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0, 1); ++ ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0); + } else { + ath_tx_send_normal(sc, txq, NULL, &bf_head); + } +@@ -238,7 +238,7 @@ static void ath_tid_drain(struct ath_sof + ath_tx_update_baw(sc, tid, fi->seqno); + + spin_unlock(&txq->axq_lock); +- ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0, 0); ++ ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0); + spin_lock(&txq->axq_lock); + } + +@@ -381,8 +381,7 @@ static void ath_tx_complete_aggr(struct + list_move_tail(&bf->list, &bf_head); + + ath_tx_rc_status(sc, bf, ts, 1, 1, 0, false); +- ath_tx_complete_buf(sc, bf, txq, &bf_head, ts, +- 0, 0); ++ ath_tx_complete_buf(sc, bf, txq, &bf_head, ts, 0); + + bf = bf_next; + } +@@ -426,7 +425,7 @@ static void ath_tx_complete_aggr(struct + + ath_tx_count_frames(sc, bf, ts, txok, &nframes, &nbad); + while (bf) { +- txfail = txpending = sendbar = 0; ++ txfail = txpending = 0; + bf_next = bf->bf_next; + + skb = bf->bf_mpdu; +@@ -489,7 +488,7 @@ static void ath_tx_complete_aggr(struct + } + + ath_tx_complete_buf(sc, bf, txq, &bf_head, ts, +- !txfail, sendbar); ++ !txfail); + } else { + /* retry the un-acked ones */ + ath9k_hw_set_clrdmask(sc->sc_ah, bf->bf_desc, false); +@@ -514,7 +513,7 @@ static void ath_tx_complete_aggr(struct + nbad, 0, false); + ath_tx_complete_buf(sc, bf, txq, + &bf_head, +- ts, 0, 0); ++ ts, 0); + break; + } + +@@ -564,6 +563,9 @@ static void ath_tx_complete_aggr(struct + } + } + ++ if (sendbar || (tid->state & AGGR_CLEANUP)) ++ ieee80211_send_bar(an->vif, sta->addr, tidno, tid->seq_start << 4); ++ + rcu_read_unlock(); + + if (needreset) +@@ -900,6 +902,7 @@ void ath_tx_aggr_stop(struct ath_softc * + spin_unlock_bh(&txq->axq_lock); + + ath_tx_flush_tid(sc, txtid); ++ ieee80211_send_bar(an->vif, sta->addr, tid, txtid->seq_start << 4); + } + + bool ath_tx_aggr_sleep(struct ath_softc *sc, struct ath_node *an) +@@ -1178,7 +1181,7 @@ static void ath_drain_txq_list(struct at + ath_tx_complete_aggr(sc, txq, bf, &bf_head, &ts, 0, + retry_tx); + else +- ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0, 0); ++ ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0); + spin_lock_bh(&txq->axq_lock); + } + } +@@ -1885,9 +1888,6 @@ static void ath_tx_complete(struct ath_s + + ath_dbg(common, ATH_DBG_XMIT, "TX complete: skb: %p\n", skb); + +- if (tx_flags & ATH_TX_BAR) +- tx_info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; +- + if (!(tx_flags & (ATH_TX_ERROR | ATH_TX_XRETRY))) { + /* Frame was ACKed */ + tx_info->flags |= IEEE80211_TX_STAT_ACK; +@@ -1932,15 +1932,12 @@ static void ath_tx_complete(struct ath_s + + static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf, + struct ath_txq *txq, struct list_head *bf_q, +- struct ath_tx_status *ts, int txok, int sendbar) ++ struct ath_tx_status *ts, int txok) + { + struct sk_buff *skb = bf->bf_mpdu; + unsigned long flags; + int tx_flags = 0; + +- if (sendbar) +- tx_flags = ATH_TX_BAR; +- + if (!txok) { + tx_flags |= ATH_TX_ERROR; + +@@ -2056,7 +2053,7 @@ static void ath_tx_process_buffer(struct + if (ts->ts_status & ATH9K_TXERR_XRETRY) + bf->bf_state.bf_type |= BUF_XRETRY; + ath_tx_rc_status(sc, bf, ts, 1, txok ? 0 : 1, txok, true); +- ath_tx_complete_buf(sc, bf, txq, bf_head, ts, txok, 0); ++ ath_tx_complete_buf(sc, bf, txq, bf_head, ts, txok); + } else + ath_tx_complete_aggr(sc, txq, bf, bf_head, ts, txok, true); + -- cgit v1.1