diff options
| -rw-r--r-- | package/kernel/mac80211/patches/335-ath9k-use-ieee80211_tx_status_noskb-where-possible.patch | 305 |
1 files changed, 305 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/335-ath9k-use-ieee80211_tx_status_noskb-where-possible.patch b/package/kernel/mac80211/patches/335-ath9k-use-ieee80211_tx_status_noskb-where-possible.patch new file mode 100644 index 0000000000..dbb5b90fe6 --- /dev/null +++ b/package/kernel/mac80211/patches/335-ath9k-use-ieee80211_tx_status_noskb-where-possible.patch @@ -0,0 +1,305 @@ +From: Felix Fietkau <nbd@nbd.name> +Date: Tue, 2 Aug 2016 12:12:18 +0200 +Subject: [PATCH] ath9k: use ieee80211_tx_status_noskb where possible + +It removes the need for undoing the padding changes to skb->data and it +improves performance by eliminating one tx status lookup per MPDU in the +status path. It is also useful for preparing a follow-up fix to better +handle powersave filtering. + +Signed-off-by: Felix Fietkau <nbd@nbd.name> +--- + +--- a/drivers/net/wireless/ath/ath9k/xmit.c ++++ b/drivers/net/wireless/ath/ath9k/xmit.c +@@ -50,9 +50,11 @@ static u16 bits_per_symbol[][2] = { + static void ath_tx_send_normal(struct ath_softc *sc, struct ath_txq *txq, + struct ath_atx_tid *tid, struct sk_buff *skb); + static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb, +- int tx_flags, struct ath_txq *txq); ++ int tx_flags, struct ath_txq *txq, ++ struct ieee80211_sta *sta); + static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf, + struct ath_txq *txq, struct list_head *bf_q, ++ struct ieee80211_sta *sta, + 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); +@@ -77,6 +79,22 @@ enum { + /* Aggregation logic */ + /*********************/ + ++static void ath_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) ++{ ++ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); ++ struct ieee80211_sta *sta = info->status.status_driver_data[0]; ++ ++ if (info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS) { ++ ieee80211_tx_status(hw, skb); ++ return; ++ } ++ ++ if (sta) ++ ieee80211_tx_status_noskb(hw, sta, info); ++ ++ dev_kfree_skb(skb); ++} ++ + void ath_txq_lock(struct ath_softc *sc, struct ath_txq *txq) + __acquires(&txq->axq_lock) + { +@@ -92,6 +110,7 @@ void ath_txq_unlock(struct ath_softc *sc + void ath_txq_unlock_complete(struct ath_softc *sc, struct ath_txq *txq) + __releases(&txq->axq_lock) + { ++ struct ieee80211_hw *hw = sc->hw; + struct sk_buff_head q; + struct sk_buff *skb; + +@@ -100,7 +119,7 @@ void ath_txq_unlock_complete(struct ath_ + spin_unlock_bh(&txq->axq_lock); + + while ((skb = __skb_dequeue(&q))) +- ieee80211_tx_status(sc->hw, skb); ++ ath_tx_status(hw, skb); + } + + static void ath_tx_queue_tid(struct ath_softc *sc, struct ath_txq *txq, +@@ -268,7 +287,7 @@ static void ath_tx_flush_tid(struct ath_ + } + + list_add_tail(&bf->list, &bf_head); +- ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0); ++ ath_tx_complete_buf(sc, bf, txq, &bf_head, NULL, &ts, 0); + } + + if (sendbar) { +@@ -333,12 +352,12 @@ static void ath_tid_drain(struct ath_sof + bf = fi->bf; + + if (!bf) { +- ath_tx_complete(sc, skb, ATH_TX_ERROR, txq); ++ ath_tx_complete(sc, skb, ATH_TX_ERROR, txq, NULL); + continue; + } + + list_add_tail(&bf->list, &bf_head); +- ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0); ++ ath_tx_complete_buf(sc, bf, txq, &bf_head, NULL, &ts, 0); + } + } + +@@ -441,12 +460,11 @@ static void ath_tx_count_frames(struct a + + static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq, + struct ath_buf *bf, struct list_head *bf_q, ++ struct ieee80211_sta *sta, + struct ath_tx_status *ts, int txok) + { + struct ath_node *an = NULL; + struct sk_buff *skb; +- struct ieee80211_sta *sta; +- struct ieee80211_hw *hw = sc->hw; + struct ieee80211_hdr *hdr; + struct ieee80211_tx_info *tx_info; + struct ath_atx_tid *tid = NULL; +@@ -475,12 +493,7 @@ static void ath_tx_complete_aggr(struct + 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); + if (!sta) { +- rcu_read_unlock(); +- + INIT_LIST_HEAD(&bf_head); + while (bf) { + bf_next = bf->bf_next; +@@ -488,7 +501,7 @@ static void ath_tx_complete_aggr(struct + if (!bf->bf_state.stale || bf_next != NULL) + list_move_tail(&bf->list, &bf_head); + +- ath_tx_complete_buf(sc, bf, txq, &bf_head, ts, 0); ++ ath_tx_complete_buf(sc, bf, txq, &bf_head, NULL, ts, 0); + + bf = bf_next; + } +@@ -598,7 +611,7 @@ static void ath_tx_complete_aggr(struct + ts); + } + +- ath_tx_complete_buf(sc, bf, txq, &bf_head, ts, ++ ath_tx_complete_buf(sc, bf, txq, &bf_head, sta, ts, + !txfail); + } else { + if (tx_info->flags & IEEE80211_TX_STATUS_EOSP) { +@@ -619,7 +632,8 @@ static void ath_tx_complete_aggr(struct + ath_tx_update_baw(sc, tid, seqno); + + ath_tx_complete_buf(sc, bf, txq, +- &bf_head, ts, 0); ++ &bf_head, NULL, ts, ++ 0); + bar_index = max_t(int, bar_index, + ATH_BA_INDEX(seq_first, seqno)); + break; +@@ -663,8 +677,6 @@ static void ath_tx_complete_aggr(struct + ath_txq_lock(sc, txq); + } + +- rcu_read_unlock(); +- + if (needreset) + ath9k_queue_reset(sc, RESET_TYPE_TX_ERROR); + } +@@ -679,7 +691,10 @@ static void ath_tx_process_buffer(struct + struct ath_tx_status *ts, struct ath_buf *bf, + struct list_head *bf_head) + { ++ struct ieee80211_hw *hw = sc->hw; + struct ieee80211_tx_info *info; ++ struct ieee80211_sta *sta; ++ struct ieee80211_hdr *hdr; + bool txok, flush; + + txok = !(ts->ts_status & ATH9K_TXERR_MASK); +@@ -692,6 +707,10 @@ static void ath_tx_process_buffer(struct + + ts->duration = ath9k_hw_get_duration(sc->sc_ah, bf->bf_desc, + ts->ts_rateindex); ++ ++ hdr = (struct ieee80211_hdr *) bf->bf_mpdu->data; ++ sta = ieee80211_find_sta_by_ifaddr(hw, hdr->addr1, hdr->addr2); ++ + if (!bf_isampdu(bf)) { + if (!flush) { + info = IEEE80211_SKB_CB(bf->bf_mpdu); +@@ -700,9 +719,9 @@ static void ath_tx_process_buffer(struct + ath_tx_rc_status(sc, bf, ts, 1, txok ? 0 : 1, txok); + ath_dynack_sample_tx_ts(sc->sc_ah, bf->bf_mpdu, ts); + } +- ath_tx_complete_buf(sc, bf, txq, bf_head, ts, txok); ++ ath_tx_complete_buf(sc, bf, txq, bf_head, sta, ts, txok); + } else +- ath_tx_complete_aggr(sc, txq, bf, bf_head, ts, txok); ++ ath_tx_complete_aggr(sc, txq, bf, bf_head, sta, ts, txok); + + if (!flush) + ath_txq_schedule(sc, txq); +@@ -938,7 +957,7 @@ ath_tx_get_tid_subframe(struct ath_softc + list_add(&bf->list, &bf_head); + __skb_unlink(skb, *q); + ath_tx_update_baw(sc, tid, seqno); +- ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0); ++ ath_tx_complete_buf(sc, bf, txq, &bf_head, NULL, &ts, 0); + continue; + } + +@@ -1847,6 +1866,7 @@ static void ath_drain_txq_list(struct at + */ + void ath_draintxq(struct ath_softc *sc, struct ath_txq *txq) + { ++ rcu_read_lock(); + ath_txq_lock(sc, txq); + + if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { +@@ -1865,6 +1885,7 @@ void ath_draintxq(struct ath_softc *sc, + ath_drain_txq_list(sc, txq, &txq->axq_q); + + ath_txq_unlock_complete(sc, txq); ++ rcu_read_unlock(); + } + + bool ath_drain_all_txq(struct ath_softc *sc) +@@ -2487,7 +2508,8 @@ void ath_tx_cabq(struct ieee80211_hw *hw + /*****************/ + + static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb, +- int tx_flags, struct ath_txq *txq) ++ int tx_flags, struct ath_txq *txq, ++ struct ieee80211_sta *sta) + { + struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); + struct ath_common *common = ath9k_hw_common(sc->sc_ah); +@@ -2507,15 +2529,17 @@ static void ath_tx_complete(struct ath_s + tx_info->flags |= IEEE80211_TX_STAT_ACK; + } + +- padpos = ieee80211_hdrlen(hdr->frame_control); +- padsize = padpos & 3; +- if (padsize && skb->len>padpos+padsize) { +- /* +- * Remove MAC header padding before giving the frame back to +- * mac80211. +- */ +- memmove(skb->data + padsize, skb->data, padpos); +- skb_pull(skb, padsize); ++ if (tx_info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS) { ++ padpos = ieee80211_hdrlen(hdr->frame_control); ++ padsize = padpos & 3; ++ if (padsize && skb->len>padpos+padsize) { ++ /* ++ * Remove MAC header padding before giving the frame back to ++ * mac80211. ++ */ ++ memmove(skb->data + padsize, skb->data, padpos); ++ skb_pull(skb, padsize); ++ } + } + + spin_lock_irqsave(&sc->sc_pm_lock, flags); +@@ -2530,12 +2554,14 @@ static void ath_tx_complete(struct ath_s + } + spin_unlock_irqrestore(&sc->sc_pm_lock, flags); + +- __skb_queue_tail(&txq->complete_q, skb); + ath_txq_skb_done(sc, txq, skb); ++ tx_info->status.status_driver_data[0] = sta; ++ __skb_queue_tail(&txq->complete_q, skb); + } + + static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf, + struct ath_txq *txq, struct list_head *bf_q, ++ struct ieee80211_sta *sta, + struct ath_tx_status *ts, int txok) + { + struct sk_buff *skb = bf->bf_mpdu; +@@ -2563,7 +2589,7 @@ static void ath_tx_complete_buf(struct a + complete(&sc->paprd_complete); + } else { + ath_debug_stat_tx(sc, bf, ts, txq, tx_flags); +- ath_tx_complete(sc, skb, tx_flags, txq); ++ ath_tx_complete(sc, skb, tx_flags, txq, sta); + } + skip_tx_complete: + /* At this point, skb (bf->bf_mpdu) is consumed...make sure we don't +@@ -2715,10 +2741,12 @@ void ath_tx_tasklet(struct ath_softc *sc + u32 qcumask = ((1 << ATH9K_NUM_TX_QUEUES) - 1) & ah->intr_txqs; + int i; + ++ rcu_read_lock(); + for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { + if (ATH_TXQ_SETUP(sc, i) && (qcumask & (1 << i))) + ath_tx_processq(sc, &sc->tx.txq[i]); + } ++ rcu_read_unlock(); + } + + void ath_tx_edma_tasklet(struct ath_softc *sc) +@@ -2732,6 +2760,7 @@ void ath_tx_edma_tasklet(struct ath_soft + struct list_head *fifo_list; + int status; + ++ rcu_read_lock(); + for (;;) { + if (test_bit(ATH_OP_HW_RESET, &common->op_flags)) + break; +@@ -2802,6 +2831,7 @@ void ath_tx_edma_tasklet(struct ath_soft + ath_tx_process_buffer(sc, txq, &ts, bf, &bf_head); + ath_txq_unlock_complete(sc, txq); + } ++ rcu_read_unlock(); + } + + /*****************/ |