1 files changed, 385 insertions, 0 deletions

diff --git a/package/kernel/mac80211/patches/304-ath9k-remove-struct-ath_atx_ac.patch b/package/kernel/mac80211/patches/304-ath9k-remove-struct-ath_atx_ac.patch
new file mode 100644
index 0000000..9f04276
--- /dev/null
+++ b/package/kernel/mac80211/patches/304-ath9k-remove-struct-ath_atx_ac.patch
@@ -0,0 +1,385 @@
+From: Felix Fietkau <nbd@openwrt.org>
+Date: Sat, 4 Apr 2015 18:39:06 +0200
+Subject: [PATCH] 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>
+---
+
+--- a/drivers/net/wireless/ath/ath9k/ath9k.h
++++ b/drivers/net/wireless/ath/ath9k/ath9k.h
+@@ -173,14 +173,6 @@ 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;
+@@ -243,7 +235,7 @@ 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;
+@@ -255,6 +247,7 @@ struct ath_atx_tid {
+ 	s8 bar_index;
+ 	bool sched;
+ 	bool active;
++	bool clear_ps_filter;
+ };
+ 
+ struct ath_node {
+@@ -262,7 +255,6 @@ 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;
+--- 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_
+ 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_
+ 		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)
+@@ -223,7 +215,7 @@ static struct sk_buff *ath_tid_dequeue(s
+ 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;
+@@ -252,7 +244,7 @@ ath_tx_tid_change_state(struct ath_softc
+ 
+ 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;
+@@ -659,7 +651,7 @@ static void ath_tx_complete_aggr(struct
+ 			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;
+ 		}
+ 	}
+ 
+@@ -749,7 +741,7 @@ static u32 ath_lookup_rate(struct ath_so
+ 	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;
+@@ -1486,8 +1478,8 @@ static bool ath_tx_sched_aggr(struct ath
+ 	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;
+ 	}
+ 
+@@ -1506,7 +1498,7 @@ int ath_tx_aggr_start(struct ath_softc *
+ 
+ 	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);
+ 
+@@ -1540,7 +1532,7 @@ void ath_tx_aggr_stop(struct ath_softc *
+ {
+ 	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;
+@@ -1553,7 +1545,6 @@ void ath_tx_aggr_sleep(struct ieee80211_
+ 		       struct ath_node *an)
+ {
+ 	struct ath_atx_tid *tid;
+-	struct ath_atx_ac *ac;
+ 	struct ath_txq *txq;
+ 	bool buffered;
+ 	int tidno;
+@@ -1561,8 +1552,7 @@ void ath_tx_aggr_sleep(struct ieee80211_
+ 	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);
+ 
+@@ -1576,11 +1566,6 @@ void ath_tx_aggr_sleep(struct ieee80211_
+ 		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);
+@@ -1590,18 +1575,16 @@ void ath_tx_aggr_sleep(struct ieee80211_
+ 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);
+@@ -1621,7 +1604,7 @@ void ath_tx_aggr_resume(struct ath_softc
+ 
+ 	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);
+ 
+@@ -1660,7 +1643,7 @@ void ath9k_release_buffered_frames(struc
+ 
+ 		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)
+@@ -1684,7 +1667,7 @@ void ath9k_release_buffered_frames(struc
+ 			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))
+@@ -1933,9 +1916,8 @@ void ath_tx_cleanupq(struct ath_softc *s
+ 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)
+@@ -1945,63 +1927,46 @@ void ath_txq_schedule(struct ath_softc *
+ 		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);
+ 		}
+ 	}
+ 
+@@ -2391,10 +2356,10 @@ int ath_tx_start(struct ieee80211_hw *hw
+ 		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
+@@ -2888,7 +2853,6 @@ int ath_tx_init(struct ath_softc *sc, in
+ 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];
+@@ -2901,24 +2865,16 @@ void ath_tx_node_init(struct ath_softc *
+ 		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;
+@@ -2926,8 +2882,7 @@ void ath_tx_node_cleanup(struct ath_soft
+ 	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);
+ 
+@@ -2936,11 +2891,6 @@ void ath_tx_node_cleanup(struct ath_soft
+ 			tid->sched = false;
+ 		}
+ 
+-		if (ac->sched) {
+-			list_del(&ac->list);
+-			tid->ac->sched = false;
+-		}
+-
+ 		ath_tid_drain(sc, txq, tid);
+ 		tid->active = false;
+