ath9k: move the sequence number from ath_frame_info to ath_buf

It is only necessary for BAW tracking and moving it to the ath_buf
makes it easier to add further improvements, such as deferring
seqno allocation in the aggregation path.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h
index eb4cdef..5d9a9aa 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -211,12 +211,12 @@ struct ath_frame_info {
        enum ath9k_key_type keytype;
        u8 keyix;
        u8 retries;
-       u16 seqno;
 };
 
 struct ath_buf_state {
        u8 bf_type;
        u8 bfs_paprd;
+       u16 seqno;
        unsigned long bfs_paprd_timestamp;
 };
 

diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c
index 34005e1..e3eeca9 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -168,7 +168,7 @@ static void ath_tx_flush_tid(struct ath_softc *sc, struct ath_atx_tid *tid)
 
                spin_unlock_bh(&txq->axq_lock);
                if (fi->retries) {
-                       ath_tx_update_baw(sc, tid, fi->seqno);
+                       ath_tx_update_baw(sc, tid, bf->bf_state.seqno);
                        ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0, 1);
                } else {
                        ath_tx_send_normal(sc, txq, NULL, &bf_head);
@@ -237,7 +237,7 @@ static void ath_tid_drain(struct ath_softc *sc, struct ath_txq *txq,
                list_add_tail(&bf->list, &bf_head);
 
                if (fi->retries)
-                       ath_tx_update_baw(sc, tid, fi->seqno);
+                       ath_tx_update_baw(sc, tid, bf->bf_state.seqno);
 
                spin_unlock(&txq->axq_lock);
                ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0, 0);
@@ -327,7 +327,7 @@ static void ath_tx_count_frames(struct ath_softc *sc, struct ath_buf *bf,
 
        while (bf) {
                fi = get_frame_info(bf->bf_mpdu);
-               ba_index = ATH_BA_INDEX(seq_st, fi->seqno);
+               ba_index = ATH_BA_INDEX(seq_st, bf->bf_state.seqno);
 
                (*nframes)++;
                if (!txok || (isaggr && !ATH_BA_ISSET(ba, ba_index)))
@@ -428,6 +428,8 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
 
        ath_tx_count_frames(sc, bf, ts, txok, &nframes, &nbad);
        while (bf) {
+               u16 seqno = bf->bf_state.seqno;
+
                txfail = txpending = sendbar = 0;
                bf_next = bf->bf_next;
 
@@ -435,7 +437,7 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
                tx_info = IEEE80211_SKB_CB(skb);
                fi = get_frame_info(skb);
 
-               if (ATH_BA_ISSET(ba, ATH_BA_INDEX(seq_st, fi->seqno))) {
+               if (ATH_BA_ISSET(ba, ATH_BA_INDEX(seq_st, seqno))) {
                        /* transmit completion, subframe is
                         * acked by block ack */
                        acked_cnt++;
@@ -479,7 +481,7 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
                         * block-ack window
                         */
                        spin_lock_bh(&txq->axq_lock);
-                       ath_tx_update_baw(sc, tid, fi->seqno);
+                       ath_tx_update_baw(sc, tid, seqno);
                        spin_unlock_bh(&txq->axq_lock);
 
                        if (rc_update && (acked_cnt == 1 || txfail_cnt == 1)) {
@@ -507,7 +509,7 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
                                         */
                                        if (!tbf) {
                                                spin_lock_bh(&txq->axq_lock);
-                                               ath_tx_update_baw(sc, tid, fi->seqno);
+                                               ath_tx_update_baw(sc, tid, seqno);
                                                spin_unlock_bh(&txq->axq_lock);
 
                                                bf->bf_state.bf_type |=
@@ -752,17 +754,19 @@ static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc,
        struct ieee80211_tx_info *tx_info;
        struct ath_frame_info *fi;
        struct sk_buff *skb;
+       u16 seqno;
 
        do {
                skb = skb_peek(&tid->buf_q);
                fi = get_frame_info(skb);
                bf = fi->bf;
+               seqno = bf->bf_state.seqno;
 
                if (!bf_first)
                        bf_first = bf;
 
                /* do not step over block-ack window */
-               if (!BAW_WITHIN(tid->seq_start, tid->baw_size, fi->seqno)) {
+               if (!BAW_WITHIN(tid->seq_start, tid->baw_size, seqno)) {
                        status = ATH_AGGR_BAW_CLOSED;
                        break;
                }
@@ -810,7 +814,7 @@ static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc,
 
                /* link buffers of this frame to the aggregate */
                if (!fi->retries)
-                       ath_tx_addto_baw(sc, tid, fi->seqno);
+                       ath_tx_addto_baw(sc, tid, seqno);
                ath9k_hw_set11n_aggr_middle(sc->sc_ah, bf->bf_desc, ndelim);
 
                __skb_unlink(skb, &tid->buf_q);
@@ -1434,6 +1438,7 @@ static void ath_tx_send_ampdu(struct ath_softc *sc, struct ath_atx_tid *tid,
 {
        struct ath_frame_info *fi = get_frame_info(bf->bf_mpdu);
        struct list_head bf_head;
+       u16 seqno = bf->bf_state.seqno;
 
        bf->bf_state.bf_type |= BUF_AMPDU;
 
@@ -1445,7 +1450,7 @@ static void ath_tx_send_ampdu(struct ath_softc *sc, struct ath_atx_tid *tid,
         * - 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, fi->seqno) ||
+           !BAW_WITHIN(tid->seq_start, tid->baw_size, seqno) ||
            txctl->txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH) {
                /*
                 * Add this frame to software queue for scheduling later
@@ -1463,7 +1468,7 @@ static void ath_tx_send_ampdu(struct ath_softc *sc, struct ath_atx_tid *tid,
 
        /* Add sub-frame to BAW */
        if (!fi->retries)
-               ath_tx_addto_baw(sc, tid, fi->seqno);
+               ath_tx_addto_baw(sc, tid, seqno);
 
        /* Queue to h/w without aggregation */
        TX_STAT_INC(txctl->txq->axq_qnum, a_queued_hw);
@@ -1519,39 +1524,19 @@ static enum ath9k_pkt_type get_hw_packet_type(struct sk_buff *skb)
 static void setup_frame_info(struct ieee80211_hw *hw, struct sk_buff *skb,
                             int framelen)
 {
-       struct ath_softc *sc = hw->priv;
        struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
        struct ieee80211_sta *sta = tx_info->control.sta;
        struct ieee80211_key_conf *hw_key = tx_info->control.hw_key;
-       struct ieee80211_hdr *hdr;
+       struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
        struct ath_frame_info *fi = get_frame_info(skb);
        struct ath_node *an = NULL;
-       struct ath_atx_tid *tid;
        enum ath9k_key_type keytype;
-       u16 seqno = 0;
-       u8 tidno;
 
        keytype = ath9k_cmn_get_hw_crypto_keytype(skb);
 
        if (sta)
                an = (struct ath_node *) sta->drv_priv;
 
-       hdr = (struct ieee80211_hdr *)skb->data;
-       if (an && ieee80211_is_data_qos(hdr->frame_control) &&
-               conf_is_ht(&hw->conf) && (sc->sc_flags & SC_OP_TXAGGR)) {
-
-               tidno = ieee80211_get_qos_ctl(hdr)[0] & IEEE80211_QOS_CTL_TID_MASK;
-
-               /*
-                * Override seqno set by upper layer with the one
-                * in tx aggregation state.
-                */
-               tid = ATH_AN_2_TID(an, tidno);
-               seqno = tid->seq_next;
-               hdr->seq_ctrl = cpu_to_le16(seqno << IEEE80211_SEQ_SEQ_SHIFT);
-               INCR(tid->seq_next, IEEE80211_SEQ_MAX);
-       }
-
        memset(fi, 0, sizeof(*fi));
        if (hw_key)
                fi->keyix = hw_key->hw_key_idx;
@@ -1561,7 +1546,6 @@ static void setup_frame_info(struct ieee80211_hw *hw, struct sk_buff *skb,
                fi->keyix = ATH9K_TXKEYIX_INVALID;
        fi->keytype = keytype;
        fi->framelen = framelen;
-       fi->seqno = seqno;
 }
 
 static int setup_tx_flags(struct sk_buff *skb)
@@ -1797,6 +1781,7 @@ static void ath_tx_start_dma(struct ath_softc *sc, struct ath_buf *bf,
        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
        struct list_head bf_head;
        struct ath_atx_tid *tid = NULL;
+       u16 seqno;
        u8 tidno;
 
        spin_lock_bh(&txctl->txq->axq_lock);
@@ -1806,6 +1791,12 @@ static void ath_tx_start_dma(struct ath_softc *sc, struct ath_buf *bf,
                        IEEE80211_QOS_CTL_TID_MASK;
                tid = ATH_AN_2_TID(txctl->an, tidno);
 
+               seqno = tid->seq_next;
+               hdr->seq_ctrl = cpu_to_le16(tid->seq_next << IEEE80211_SEQ_SEQ_SHIFT);
+               INCR(tid->seq_next, IEEE80211_SEQ_MAX);
+
+               bf->bf_state.seqno = seqno;
+
                WARN_ON(tid->ac->txq != txctl->txq);
        }