| 1 | --- a/drivers/net/wireless/ath/ath9k/ath9k.h |
| 2 | +++ b/drivers/net/wireless/ath/ath9k/ath9k.h |
| 3 | @@ -242,6 +242,7 @@ struct ath_atx_tid { |
| 4 | struct ath_node *an; |
| 5 | struct ath_atx_ac *ac; |
| 6 | unsigned long tx_buf[BITS_TO_LONGS(ATH_TID_MAX_BUFS)]; |
| 7 | + int buf_pending; |
| 8 | int bar_index; |
| 9 | u16 seq_start; |
| 10 | u16 seq_next; |
| 11 | @@ -288,6 +289,9 @@ struct ath_tx_control { |
| 12 | * (axq_qnum). |
| 13 | */ |
| 14 | struct ath_tx { |
| 15 | + u32 qlen_single; |
| 16 | + u32 qlen_aggr; |
| 17 | + |
| 18 | u16 seq_no; |
| 19 | u32 txqsetup; |
| 20 | spinlock_t txbuflock; |
| 21 | --- a/drivers/net/wireless/ath/ath9k/debug.c |
| 22 | +++ b/drivers/net/wireless/ath/ath9k/debug.c |
| 23 | @@ -1674,6 +1674,10 @@ int ath9k_init_debug(struct ath_hw *ah) |
| 24 | &fops_interrupt); |
| 25 | debugfs_create_file("xmit", S_IRUSR, sc->debug.debugfs_phy, sc, |
| 26 | &fops_xmit); |
| 27 | + debugfs_create_u32("qlen_single", S_IRUSR | S_IWUSR, |
| 28 | + sc->debug.debugfs_phy, &sc->tx.qlen_single); |
| 29 | + debugfs_create_u32("qlen_aggr", S_IRUSR | S_IWUSR, |
| 30 | + sc->debug.debugfs_phy, &sc->tx.qlen_aggr); |
| 31 | debugfs_create_file("stations", S_IRUSR, sc->debug.debugfs_phy, sc, |
| 32 | &fops_stations); |
| 33 | debugfs_create_file("misc", S_IRUSR, sc->debug.debugfs_phy, sc, |
| 34 | --- a/drivers/net/wireless/ath/ath9k/xmit.c |
| 35 | +++ b/drivers/net/wireless/ath/ath9k/xmit.c |
| 36 | @@ -392,6 +392,14 @@ static void ath_tx_count_frames(struct a |
| 37 | } |
| 38 | } |
| 39 | |
| 40 | +static struct ath_atx_tid *ath_get_tid(struct ath_node *an, struct sk_buff *skb) |
| 41 | +{ |
| 42 | + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| 43 | + u8 tidno; |
| 44 | + |
| 45 | + tidno = ieee80211_get_qos_ctl(hdr)[0] & IEEE80211_QOS_CTL_TID_MASK; |
| 46 | + return ATH_AN_2_TID(an, tidno); |
| 47 | +} |
| 48 | |
| 49 | static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq, |
| 50 | struct ath_buf *bf, struct list_head *bf_q, |
| 51 | @@ -486,6 +494,8 @@ static void ath_tx_complete_aggr(struct |
| 52 | __skb_queue_head_init(&bf_pending); |
| 53 | |
| 54 | ath_tx_count_frames(sc, bf, ts, txok, &nframes, &nbad); |
| 55 | + tid->buf_pending -= nframes; |
| 56 | + |
| 57 | while (bf) { |
| 58 | u16 seqno = bf->bf_state.seqno; |
| 59 | |
| 60 | @@ -884,6 +894,7 @@ static enum ATH_AGGR_STATUS ath_tx_form_ |
| 61 | ath_tx_addto_baw(sc, tid, seqno); |
| 62 | bf->bf_state.ndelim = ndelim; |
| 63 | |
| 64 | + tid->buf_pending++; |
| 65 | __skb_unlink(skb, &tid->buf_q); |
| 66 | list_add_tail(&bf->list, bf_q); |
| 67 | if (bf_prev) |
| 68 | @@ -1739,6 +1750,8 @@ static void ath_tx_send_ampdu(struct ath |
| 69 | /* Add sub-frame to BAW */ |
| 70 | ath_tx_addto_baw(sc, tid, bf->bf_state.seqno); |
| 71 | |
| 72 | + tid->buf_pending++; |
| 73 | + |
| 74 | /* Queue to h/w without aggregation */ |
| 75 | TX_STAT_INC(txctl->txq->axq_qnum, a_queued_hw); |
| 76 | bf->bf_lastbf = bf; |
| 77 | @@ -1863,22 +1876,11 @@ error: |
| 78 | |
| 79 | /* FIXME: tx power */ |
| 80 | static void ath_tx_start_dma(struct ath_softc *sc, struct sk_buff *skb, |
| 81 | - struct ath_tx_control *txctl) |
| 82 | + struct ath_tx_control *txctl, |
| 83 | + struct ath_atx_tid *tid) |
| 84 | { |
| 85 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
| 86 | - struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| 87 | - struct ath_atx_tid *tid = NULL; |
| 88 | struct ath_buf *bf; |
| 89 | - u8 tidno; |
| 90 | - |
| 91 | - if ((sc->sc_flags & SC_OP_TXAGGR) && txctl->an && |
| 92 | - ieee80211_is_data_qos(hdr->frame_control)) { |
| 93 | - tidno = ieee80211_get_qos_ctl(hdr)[0] & |
| 94 | - IEEE80211_QOS_CTL_TID_MASK; |
| 95 | - tid = ATH_AN_2_TID(txctl->an, tidno); |
| 96 | - |
| 97 | - WARN_ON(tid->ac->txq != txctl->txq); |
| 98 | - } |
| 99 | |
| 100 | if ((tx_info->flags & IEEE80211_TX_CTL_AMPDU) && tid) { |
| 101 | /* |
| 102 | @@ -1910,6 +1912,7 @@ int ath_tx_start(struct ieee80211_hw *hw |
| 103 | struct ieee80211_vif *vif = info->control.vif; |
| 104 | struct ath_softc *sc = hw->priv; |
| 105 | struct ath_txq *txq = txctl->txq; |
| 106 | + struct ath_atx_tid *tid = NULL; |
| 107 | int padpos, padsize; |
| 108 | int frmlen = skb->len + FCS_LEN; |
| 109 | int q; |
| 110 | @@ -1952,6 +1955,24 @@ int ath_tx_start(struct ieee80211_hw *hw |
| 111 | |
| 112 | setup_frame_info(hw, skb, frmlen); |
| 113 | |
| 114 | + if ((sc->sc_flags & SC_OP_TXAGGR) && txctl->an && |
| 115 | + ieee80211_is_data_qos(hdr->frame_control)) { |
| 116 | + tid = ath_get_tid(txctl->an, skb); |
| 117 | + |
| 118 | + WARN_ON(tid->ac->txq != txq); |
| 119 | + } |
| 120 | + |
| 121 | + if ((info->flags & IEEE80211_TX_CTL_AMPDU) && tid) { |
| 122 | + if (sc->tx.qlen_aggr > 0 && skb_queue_len(&tid->buf_q) + |
| 123 | + tid->buf_pending >= sc->tx.qlen_aggr) |
| 124 | + return -ENOMEM; |
| 125 | + } else { |
| 126 | + if (sc->tx.qlen_single > 0 && |
| 127 | + txq->axq_depth - txq->axq_ampdu_depth >= |
| 128 | + sc->tx.qlen_single) |
| 129 | + return -ENOMEM; |
| 130 | + } |
| 131 | + |
| 132 | /* |
| 133 | * At this point, the vif, hw_key and sta pointers in the tx control |
| 134 | * info are no longer valid (overwritten by the ath_frame_info data. |
| 135 | @@ -1966,7 +1987,7 @@ int ath_tx_start(struct ieee80211_hw *hw |
| 136 | txq->stopped = true; |
| 137 | } |
| 138 | |
| 139 | - ath_tx_start_dma(sc, skb, txctl); |
| 140 | + ath_tx_start_dma(sc, skb, txctl, tid); |
| 141 | |
| 142 | ath_txq_unlock(sc, txq); |
| 143 | |
| 144 | |
