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143 lines
4.4 KiB
143 lines
4.4 KiB
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
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+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
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@@ -242,6 +242,7 @@ struct ath_atx_tid {
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struct ath_node *an;
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struct ath_atx_ac *ac;
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unsigned long tx_buf[BITS_TO_LONGS(ATH_TID_MAX_BUFS)];
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+ int buf_pending;
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int bar_index;
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u16 seq_start;
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u16 seq_next;
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@@ -288,6 +289,9 @@ struct ath_tx_control {
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* (axq_qnum).
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*/
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struct ath_tx {
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+ u32 qlen_single;
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+ u32 qlen_aggr;
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+
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u16 seq_no;
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u32 txqsetup;
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spinlock_t txbuflock;
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--- a/drivers/net/wireless/ath/ath9k/debug.c
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+++ b/drivers/net/wireless/ath/ath9k/debug.c
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@@ -1732,6 +1732,10 @@ int ath9k_init_debug(struct ath_hw *ah)
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sc, &fops_wiphy);
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debugfs_create_file("xmit", S_IRUSR, sc->debug.debugfs_phy, sc,
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&fops_xmit);
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+ debugfs_create_u32("qlen_single", S_IRUSR | S_IWUSR,
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+ sc->debug.debugfs_phy, &sc->tx.qlen_single);
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+ debugfs_create_u32("qlen_aggr", S_IRUSR | S_IWUSR,
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+ sc->debug.debugfs_phy, &sc->tx.qlen_aggr);
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debugfs_create_file("stations", S_IRUSR, sc->debug.debugfs_phy, sc,
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&fops_stations);
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debugfs_create_file("misc", S_IRUSR, sc->debug.debugfs_phy, sc,
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--- a/drivers/net/wireless/ath/ath9k/xmit.c
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+++ b/drivers/net/wireless/ath/ath9k/xmit.c
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@@ -392,6 +392,14 @@ static void ath_tx_count_frames(struct a
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}
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}
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+static struct ath_atx_tid *ath_get_tid(struct ath_node *an, struct sk_buff *skb)
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+{
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+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
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+ u8 tidno;
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+
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+ tidno = ieee80211_get_qos_ctl(hdr)[0] & IEEE80211_QOS_CTL_TID_MASK;
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+ return ATH_AN_2_TID(an, tidno);
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+}
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static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
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struct ath_buf *bf, struct list_head *bf_q,
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@@ -486,6 +494,8 @@ static void ath_tx_complete_aggr(struct
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__skb_queue_head_init(&bf_pending);
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ath_tx_count_frames(sc, bf, ts, txok, &nframes, &nbad);
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+ tid->buf_pending -= nframes;
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+
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while (bf) {
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u16 seqno = bf->bf_state.seqno;
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@@ -885,6 +895,7 @@ static enum ATH_AGGR_STATUS ath_tx_form_
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ath_tx_addto_baw(sc, tid, seqno);
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bf->bf_state.ndelim = ndelim;
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+ tid->buf_pending++;
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__skb_unlink(skb, &tid->buf_q);
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list_add_tail(&bf->list, bf_q);
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if (bf_prev)
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@@ -1740,6 +1751,8 @@ static void ath_tx_send_ampdu(struct ath
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/* Add sub-frame to BAW */
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ath_tx_addto_baw(sc, tid, bf->bf_state.seqno);
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+ tid->buf_pending++;
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+
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/* Queue to h/w without aggregation */
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TX_STAT_INC(txctl->txq->axq_qnum, a_queued_hw);
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bf->bf_lastbf = bf;
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@@ -1864,22 +1877,11 @@ error:
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/* FIXME: tx power */
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static void ath_tx_start_dma(struct ath_softc *sc, struct sk_buff *skb,
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- struct ath_tx_control *txctl)
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+ struct ath_tx_control *txctl,
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+ struct ath_atx_tid *tid)
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{
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struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
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- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
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- struct ath_atx_tid *tid = NULL;
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struct ath_buf *bf;
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- u8 tidno;
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-
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- if ((sc->sc_flags & SC_OP_TXAGGR) && txctl->an &&
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- ieee80211_is_data_qos(hdr->frame_control)) {
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- tidno = ieee80211_get_qos_ctl(hdr)[0] &
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- IEEE80211_QOS_CTL_TID_MASK;
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- tid = ATH_AN_2_TID(txctl->an, tidno);
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-
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- WARN_ON(tid->ac->txq != txctl->txq);
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- }
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if ((tx_info->flags & IEEE80211_TX_CTL_AMPDU) && tid) {
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/*
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@@ -1911,6 +1913,7 @@ int ath_tx_start(struct ieee80211_hw *hw
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struct ieee80211_vif *vif = info->control.vif;
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struct ath_softc *sc = hw->priv;
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struct ath_txq *txq = txctl->txq;
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+ struct ath_atx_tid *tid = NULL;
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int padpos, padsize;
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int frmlen = skb->len + FCS_LEN;
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int q;
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@@ -1953,6 +1956,24 @@ int ath_tx_start(struct ieee80211_hw *hw
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setup_frame_info(hw, skb, frmlen);
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+ if ((sc->sc_flags & SC_OP_TXAGGR) && txctl->an &&
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+ ieee80211_is_data_qos(hdr->frame_control)) {
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+ tid = ath_get_tid(txctl->an, skb);
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+
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+ WARN_ON(tid->ac->txq != txq);
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+ }
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+
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+ if ((info->flags & IEEE80211_TX_CTL_AMPDU) && tid) {
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+ if (sc->tx.qlen_aggr > 0 && skb_queue_len(&tid->buf_q) +
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+ tid->buf_pending >= sc->tx.qlen_aggr)
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+ return -ENOMEM;
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+ } else {
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+ if (sc->tx.qlen_single > 0 &&
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+ txq->axq_depth - txq->axq_ampdu_depth >=
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+ sc->tx.qlen_single)
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+ return -ENOMEM;
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+ }
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+
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/*
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* At this point, the vif, hw_key and sta pointers in the tx control
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* info are no longer valid (overwritten by the ath_frame_info data.
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@@ -1967,7 +1988,7 @@ int ath_tx_start(struct ieee80211_hw *hw
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txq->stopped = true;
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}
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- ath_tx_start_dma(sc, skb, txctl);
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+ ath_tx_start_dma(sc, skb, txctl, tid);
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ath_txq_unlock(sc, txq);
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