ath9k: remove struct ath_atx_ac

struct ath_atx_ac contains a list of active TIDs belonging to one WMM AC.
This patch changes the code to track active station TIDs in the txq directly.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h
index db7a7b6..ac1f100 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -172,14 +172,6 @@ struct ath_txq {
        struct sk_buff_head complete_q;
 };
 
-struct ath_atx_ac {
-       struct ath_txq *txq;
-       struct list_head list;
-       struct list_head tid_q;
-       bool clear_ps_filter;
-       bool sched;
-};
-
 struct ath_frame_info {
        struct ath_buf *bf;
        u16 framelen;
@@ -242,7 +234,7 @@ struct ath_atx_tid {
        struct sk_buff_head buf_q;
        struct sk_buff_head retry_q;
        struct ath_node *an;
-       struct ath_atx_ac *ac;
+       struct ath_txq *txq;
        unsigned long tx_buf[BITS_TO_LONGS(ATH_TID_MAX_BUFS)];
        u16 seq_start;
        u16 seq_next;
@@ -254,6 +246,7 @@ struct ath_atx_tid {
        s8 bar_index;
        bool sched;
        bool active;
+       bool clear_ps_filter;
 };
 
 struct ath_node {
@@ -261,7 +254,6 @@ struct ath_node {
        struct ieee80211_sta *sta; /* station struct we're part of */
        struct ieee80211_vif *vif; /* interface with which we're associated */
        struct ath_atx_tid tid[IEEE80211_NUM_TIDS];
-       struct ath_atx_ac ac[IEEE80211_NUM_ACS];
 
        u16 maxampdu;
        u8 mpdudensity;

diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c
index b766a7f..f7d6a85 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -106,7 +106,6 @@ void ath_txq_unlock_complete(struct ath_softc *sc, struct ath_txq *txq)
 static void ath_tx_queue_tid(struct ath_softc *sc, struct ath_txq *txq,
                             struct ath_atx_tid *tid)
 {
-       struct ath_atx_ac *ac = tid->ac;
        struct list_head *list;
        struct ath_vif *avp = (struct ath_vif *) tid->an->vif->drv_priv;
        struct ath_chanctx *ctx = avp->chanctx;
@@ -118,15 +117,8 @@ static void ath_tx_queue_tid(struct ath_softc *sc, struct ath_txq *txq,
                return;
 
        tid->sched = true;
-       list_add_tail(&tid->list, &ac->tid_q);
-
-       if (ac->sched)
-               return;
-
-       ac->sched = true;
-
        list = &ctx->acq[TID_TO_WME_AC(tid->tidno)];
-       list_add_tail(&ac->list, list);
+       list_add_tail(&tid->list, list);
 }
 
 static struct ath_frame_info *get_frame_info(struct sk_buff *skb)
@@ -208,7 +200,7 @@ static struct sk_buff *ath_tid_dequeue(struct ath_atx_tid *tid)
 static void
 ath_tx_tid_change_state(struct ath_softc *sc, struct ath_atx_tid *tid)
 {
-       struct ath_txq *txq = tid->ac->txq;
+       struct ath_txq *txq = tid->txq;
        struct ieee80211_tx_info *tx_info;
        struct sk_buff *skb, *tskb;
        struct ath_buf *bf;
@@ -237,7 +229,7 @@ ath_tx_tid_change_state(struct ath_softc *sc, struct ath_atx_tid *tid)
 
 static void ath_tx_flush_tid(struct ath_softc *sc, struct ath_atx_tid *tid)
 {
-       struct ath_txq *txq = tid->ac->txq;
+       struct ath_txq *txq = tid->txq;
        struct sk_buff *skb;
        struct ath_buf *bf;
        struct list_head bf_head;
@@ -644,7 +636,7 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
                        ath_tx_queue_tid(sc, txq, tid);
 
                        if (ts->ts_status & (ATH9K_TXERR_FILT | ATH9K_TXERR_XRETRY))
-                               tid->ac->clear_ps_filter = true;
+                               tid->clear_ps_filter = true;
                }
        }
 
@@ -734,7 +726,7 @@ static u32 ath_lookup_rate(struct ath_softc *sc, struct ath_buf *bf,
        struct ieee80211_tx_rate *rates;
        u32 max_4ms_framelen, frmlen;
        u16 aggr_limit, bt_aggr_limit, legacy = 0;
-       int q = tid->ac->txq->mac80211_qnum;
+       int q = tid->txq->mac80211_qnum;
        int i;
 
        skb = bf->bf_mpdu;
@@ -1471,8 +1463,8 @@ static bool ath_tx_sched_aggr(struct ath_softc *sc, struct ath_txq *txq,
        if (list_empty(&bf_q))
                return false;
 
-       if (tid->ac->clear_ps_filter || tid->an->no_ps_filter) {
-               tid->ac->clear_ps_filter = false;
+       if (tid->clear_ps_filter || tid->an->no_ps_filter) {
+               tid->clear_ps_filter = false;
                tx_info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
        }
 
@@ -1491,7 +1483,7 @@ int ath_tx_aggr_start(struct ath_softc *sc, struct ieee80211_sta *sta,
 
        an = (struct ath_node *)sta->drv_priv;
        txtid = ATH_AN_2_TID(an, tid);
-       txq = txtid->ac->txq;
+       txq = txtid->txq;
 
        ath_txq_lock(sc, txq);
 
@@ -1525,7 +1517,7 @@ void ath_tx_aggr_stop(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid)
 {
        struct ath_node *an = (struct ath_node *)sta->drv_priv;
        struct ath_atx_tid *txtid = ATH_AN_2_TID(an, tid);
-       struct ath_txq *txq = txtid->ac->txq;
+       struct ath_txq *txq = txtid->txq;
 
        ath_txq_lock(sc, txq);
        txtid->active = false;
@@ -1538,7 +1530,6 @@ void ath_tx_aggr_sleep(struct ieee80211_sta *sta, struct ath_softc *sc,
                       struct ath_node *an)
 {
        struct ath_atx_tid *tid;
-       struct ath_atx_ac *ac;
        struct ath_txq *txq;
        bool buffered;
        int tidno;
@@ -1546,8 +1537,7 @@ void ath_tx_aggr_sleep(struct ieee80211_sta *sta, struct ath_softc *sc,
        for (tidno = 0, tid = &an->tid[tidno];
             tidno < IEEE80211_NUM_TIDS; tidno++, tid++) {
 
-               ac = tid->ac;
-               txq = ac->txq;
+               txq = tid->txq;
 
                ath_txq_lock(sc, txq);
 
@@ -1561,11 +1551,6 @@ void ath_tx_aggr_sleep(struct ieee80211_sta *sta, struct ath_softc *sc,
                tid->sched = false;
                list_del(&tid->list);
 
-               if (ac->sched) {
-                       ac->sched = false;
-                       list_del(&ac->list);
-               }
-
                ath_txq_unlock(sc, txq);
 
                ieee80211_sta_set_buffered(sta, tidno, buffered);
@@ -1575,18 +1560,16 @@ void ath_tx_aggr_sleep(struct ieee80211_sta *sta, struct ath_softc *sc,
 void ath_tx_aggr_wakeup(struct ath_softc *sc, struct ath_node *an)
 {
        struct ath_atx_tid *tid;
-       struct ath_atx_ac *ac;
        struct ath_txq *txq;
        int tidno;
 
        for (tidno = 0, tid = &an->tid[tidno];
             tidno < IEEE80211_NUM_TIDS; tidno++, tid++) {
 
-               ac = tid->ac;
-               txq = ac->txq;
+               txq = tid->txq;
 
                ath_txq_lock(sc, txq);
-               ac->clear_ps_filter = true;
+               tid->clear_ps_filter = true;
 
                if (ath_tid_has_buffered(tid)) {
                        ath_tx_queue_tid(sc, txq, tid);
@@ -1606,7 +1589,7 @@ void ath_tx_aggr_resume(struct ath_softc *sc, struct ieee80211_sta *sta,
 
        an = (struct ath_node *)sta->drv_priv;
        tid = ATH_AN_2_TID(an, tidno);
-       txq = tid->ac->txq;
+       txq = tid->txq;
 
        ath_txq_lock(sc, txq);
 
@@ -1645,7 +1628,7 @@ void ath9k_release_buffered_frames(struct ieee80211_hw *hw,
 
                tid = ATH_AN_2_TID(an, i);
 
-               ath_txq_lock(sc, tid->ac->txq);
+               ath_txq_lock(sc, tid->txq);
                while (nframes > 0) {
                        bf = ath_tx_get_tid_subframe(sc, sc->tx.uapsdq, tid, &tid_q);
                        if (!bf)
@@ -1669,7 +1652,7 @@ void ath9k_release_buffered_frames(struct ieee80211_hw *hw,
                        if (an->sta && !ath_tid_has_buffered(tid))
                                ieee80211_sta_set_buffered(an->sta, i, false);
                }
-               ath_txq_unlock_complete(sc, tid->ac->txq);
+               ath_txq_unlock_complete(sc, tid->txq);
        }
 
        if (list_empty(&bf_q))
@@ -1918,9 +1901,8 @@ void ath_tx_cleanupq(struct ath_softc *sc, struct ath_txq *txq)
 void ath_txq_schedule(struct ath_softc *sc, struct ath_txq *txq)
 {
        struct ath_common *common = ath9k_hw_common(sc->sc_ah);
-       struct ath_atx_ac *ac, *last_ac;
        struct ath_atx_tid *tid, *last_tid;
-       struct list_head *ac_list;
+       struct list_head *tid_list;
        bool sent = false;
 
        if (txq->mac80211_qnum < 0)
@@ -1930,63 +1912,46 @@ void ath_txq_schedule(struct ath_softc *sc, struct ath_txq *txq)
                return;
 
        spin_lock_bh(&sc->chan_lock);
-       ac_list = &sc->cur_chan->acq[txq->mac80211_qnum];
+       tid_list = &sc->cur_chan->acq[txq->mac80211_qnum];
 
-       if (list_empty(ac_list)) {
+       if (list_empty(tid_list)) {
                spin_unlock_bh(&sc->chan_lock);
                return;
        }
 
        rcu_read_lock();
 
-       last_ac = list_entry(ac_list->prev, struct ath_atx_ac, list);
-       while (!list_empty(ac_list)) {
+       last_tid = list_entry(tid_list->prev, struct ath_atx_tid, list);
+       while (!list_empty(tid_list)) {
                bool stop = false;
 
                if (sc->cur_chan->stopped)
                        break;
 
-               ac = list_first_entry(ac_list, struct ath_atx_ac, list);
-               last_tid = list_entry(ac->tid_q.prev, struct ath_atx_tid, list);
-               list_del(&ac->list);
-               ac->sched = false;
-
-               while (!list_empty(&ac->tid_q)) {
-
-                       tid = list_first_entry(&ac->tid_q, struct ath_atx_tid,
-                                              list);
-                       list_del(&tid->list);
-                       tid->sched = false;
-
-                       if (ath_tx_sched_aggr(sc, txq, tid, &stop))
-                               sent = true;
-
-                       /*
-                        * add tid to round-robin queue if more frames
-                        * are pending for the tid
-                        */
-                       if (ath_tid_has_buffered(tid))
-                               ath_tx_queue_tid(sc, txq, tid);
+               tid = list_first_entry(tid_list, struct ath_atx_tid, list);
+               list_del(&tid->list);
+               tid->sched = false;
 
-                       if (stop || tid == last_tid)
-                               break;
-               }
+               if (ath_tx_sched_aggr(sc, txq, tid, &stop))
+                       sent = true;
 
-               if (!list_empty(&ac->tid_q) && !ac->sched) {
-                       ac->sched = true;
-                       list_add_tail(&ac->list, ac_list);
-               }
+               /*
+                * add tid to round-robin queue if more frames
+                * are pending for the tid
+                */
+               if (ath_tid_has_buffered(tid))
+                       ath_tx_queue_tid(sc, txq, tid);
 
                if (stop)
                        break;
 
-               if (ac == last_ac) {
+               if (tid == last_tid) {
                        if (!sent)
                                break;
 
                        sent = false;
-                       last_ac = list_entry(ac_list->prev,
-                                            struct ath_atx_ac, list);
+                       last_tid = list_entry(tid_list->prev,
+                                             struct ath_atx_tid, list);
                }
        }
 
@@ -2376,10 +2341,10 @@ int ath_tx_start(struct ieee80211_hw *hw, struct sk_buff *skb,
                txq = sc->tx.uapsdq;
                ath_txq_lock(sc, txq);
        } else if (txctl->an && queue) {
-               WARN_ON(tid->ac->txq != txctl->txq);
+               WARN_ON(tid->txq != txctl->txq);
 
                if (info->flags & IEEE80211_TX_CTL_CLEAR_PS_FILT)
-                       tid->ac->clear_ps_filter = true;
+                       tid->clear_ps_filter = true;
 
                /*
                 * Add this frame to software queue for scheduling later
@@ -2873,7 +2838,6 @@ int ath_tx_init(struct ath_softc *sc, int nbufs)
 void ath_tx_node_init(struct ath_softc *sc, struct ath_node *an)
 {
        struct ath_atx_tid *tid;
-       struct ath_atx_ac *ac;
        int tidno, acno;
 
        for (tidno = 0, tid = &an->tid[tidno];
@@ -2886,24 +2850,16 @@ void ath_tx_node_init(struct ath_softc *sc, struct ath_node *an)
                tid->baw_head  = tid->baw_tail = 0;
                tid->sched     = false;
                tid->active        = false;
+               tid->clear_ps_filter = true;
                __skb_queue_head_init(&tid->buf_q);
                __skb_queue_head_init(&tid->retry_q);
                acno = TID_TO_WME_AC(tidno);
-               tid->ac = &an->ac[acno];
-       }
-
-       for (acno = 0, ac = &an->ac[acno];
-            acno < IEEE80211_NUM_ACS; acno++, ac++) {
-               ac->sched    = false;
-               ac->clear_ps_filter = true;
-               ac->txq = sc->tx.txq_map[acno];
-               INIT_LIST_HEAD(&ac->tid_q);
+               tid->txq = sc->tx.txq_map[acno];
        }
 }
 
 void ath_tx_node_cleanup(struct ath_softc *sc, struct ath_node *an)
 {
-       struct ath_atx_ac *ac;
        struct ath_atx_tid *tid;
        struct ath_txq *txq;
        int tidno;
@@ -2911,8 +2867,7 @@ void ath_tx_node_cleanup(struct ath_softc *sc, struct ath_node *an)
        for (tidno = 0, tid = &an->tid[tidno];
             tidno < IEEE80211_NUM_TIDS; tidno++, tid++) {
 
-               ac = tid->ac;
-               txq = ac->txq;
+               txq = tid->txq;
 
                ath_txq_lock(sc, txq);
 
@@ -2921,11 +2876,6 @@ void ath_tx_node_cleanup(struct ath_softc *sc, struct ath_node *an)
                        tid->sched = false;
                }
 
-               if (ac->sched) {
-                       list_del(&ac->list);
-                       tid->ac->sched = false;
-               }
-
                ath_tid_drain(sc, txq, tid);
                tid->active = false;