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ath9k: add support for IEEE80211_TX_CTL_PS_RESPONSE 

Use the UAPSD hardware queue to get PS-Poll responses out as fast as
possible and without backoff.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Felix Fietkau 2013-06-07 18:12:00 +02:00 коммит произвёл John W. Linville
Родитель ee06fcad74
Коммит f2c7a79337
3 изменённых файлов: 30 добавлений и 16 удалений
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1
drivers/net/wireless/ath/ath9k/ath9k.h
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@ -296,6 +296,7 @@ struct ath_tx {
struct ath_txq txq[ATH9K_NUM_TX_QUEUES];
struct ath_descdma txdma;
struct ath_txq *txq_map[IEEE80211_NUM_ACS];
struct ath_txq *uapsdq;
u32 txq_max_pending[IEEE80211_NUM_ACS];
u16 max_aggr_framelen[IEEE80211_NUM_ACS][4][32];
};

2
drivers/net/wireless/ath/ath9k/init.c
Просмотреть файл

@ -432,6 +432,8 @@ static int ath9k_init_queues(struct ath_softc *sc)
sc->config.cabqReadytime = ATH_CABQ_READY_TIME;
ath_cabq_update(sc);
sc->tx.uapsdq = ath_txq_setup(sc, ATH9K_TX_QUEUE_UAPSD, 0);
for (i = 0; i < IEEE80211_NUM_ACS; i++) {
sc->tx.txq_map[i] = ath_txq_setup(sc, ATH9K_TX_QUEUE_DATA, i);
sc->tx.txq_map[i]->mac80211_qnum = i;

43
drivers/net/wireless/ath/ath9k/xmit.c
Просмотреть файл

@ -1681,8 +1681,9 @@ static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq,
}
}
static void ath_tx_send_ampdu(struct ath_softc *sc, struct ath_atx_tid *tid,
struct sk_buff *skb, struct ath_tx_control *txctl)
static void ath_tx_send_ampdu(struct ath_softc *sc, struct ath_txq *txq,
struct ath_atx_tid *tid, struct sk_buff *skb,
struct ath_tx_control *txctl)
{
struct ath_frame_info *fi = get_frame_info(skb);
struct list_head bf_head;
@ -1695,21 +1696,22 @@ static void ath_tx_send_ampdu(struct ath_softc *sc, struct ath_atx_tid *tid,
* - seqno is not within block-ack window
* - h/w queue depth exceeds low water mark
*/
if (!skb_queue_empty(&tid->buf_q) || tid->paused ||
!BAW_WITHIN(tid->seq_start, tid->baw_size, tid->seq_next) ||
txctl->txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH) {
if ((!skb_queue_empty(&tid->buf_q) || tid->paused ||
!BAW_WITHIN(tid->seq_start, tid->baw_size, tid->seq_next) ||
txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH) &&
txq != sc->tx.uapsdq) {
/*
* Add this frame to software queue for scheduling later
* for aggregation.
*/
TX_STAT_INC(txctl->txq->axq_qnum, a_queued_sw);
TX_STAT_INC(txq->axq_qnum, a_queued_sw);
__skb_queue_tail(&tid->buf_q, skb);
if (!txctl->an || !txctl->an->sleeping)
ath_tx_queue_tid(txctl->txq, tid);
ath_tx_queue_tid(txq, tid);
return;
}
bf = ath_tx_setup_buffer(sc, txctl->txq, tid, skb);
bf = ath_tx_setup_buffer(sc, txq, tid, skb);
if (!bf) {
ieee80211_free_txskb(sc->hw, skb);
return;
@ -1724,10 +1726,10 @@ static void ath_tx_send_ampdu(struct ath_softc *sc, struct ath_atx_tid *tid,
ath_tx_addto_baw(sc, tid, bf->bf_state.seqno);
/* Queue to h/w without aggregation */
TX_STAT_INC(txctl->txq->axq_qnum, a_queued_hw);
TX_STAT_INC(txq->axq_qnum, a_queued_hw);
bf->bf_lastbf = bf;
ath_tx_fill_desc(sc, bf, txctl->txq, fi->framelen);
ath_tx_txqaddbuf(sc, txctl->txq, &bf_head, false);
ath_tx_fill_desc(sc, bf, txq, fi->framelen);
ath_tx_txqaddbuf(sc, txq, &bf_head, false);
}
static void ath_tx_send_normal(struct ath_softc *sc, struct ath_txq *txq,
@ -1935,6 +1937,12 @@ int ath_tx_start(struct ieee80211_hw *hw, struct sk_buff *skb,
txq->stopped = true;
}
if (info->flags & IEEE80211_TX_CTL_PS_RESPONSE) {
ath_txq_unlock(sc, txq);
txq = sc->tx.uapsdq;
ath_txq_lock(sc, txq);
}
if (txctl->an && ieee80211_is_data_qos(hdr->frame_control)) {
tidno = ieee80211_get_qos_ctl(hdr)[0] &
IEEE80211_QOS_CTL_TID_MASK;
@ -1948,11 +1956,11 @@ int ath_tx_start(struct ieee80211_hw *hw, struct sk_buff *skb,
* Try aggregation if it's a unicast data frame
* and the destination is HT capable.
*/
ath_tx_send_ampdu(sc, tid, skb, txctl);
ath_tx_send_ampdu(sc, txq, tid, skb, txctl);
goto out;
}
bf = ath_tx_setup_buffer(sc, txctl->txq, tid, skb);
bf = ath_tx_setup_buffer(sc, txq, tid, skb);
if (!bf) {
if (txctl->paprd)
dev_kfree_skb_any(skb);
@ -1967,7 +1975,7 @@ int ath_tx_start(struct ieee80211_hw *hw, struct sk_buff *skb,
bf->bf_state.bfs_paprd_timestamp = jiffies;
ath_set_rates(vif, sta, bf);
ath_tx_send_normal(sc, txctl->txq, tid, skb);
ath_tx_send_normal(sc, txq, tid, skb);
out:
ath_txq_unlock(sc, txq);
@ -2020,7 +2028,12 @@ static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb,
}
spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
__skb_queue_tail(&txq->complete_q, skb);
q = skb_get_queue_mapping(skb);
if (txq == sc->tx.uapsdq)
txq = sc->tx.txq_map[q];
if (txq == sc->tx.txq_map[q]) {
if (WARN_ON(--txq->pending_frames < 0))
txq->pending_frames = 0;
@ -2031,8 +2044,6 @@ static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb,
txq->stopped = false;
}
}
__skb_queue_tail(&txq->complete_q, skb);
}
static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf,