--- /dev/null
+From: =?UTF-8?q?Toke=20H=C3=B8iland-J=C3=B8rgensen?= <toke@toke.dk>
+Date: Wed, 6 Jul 2016 21:34:17 +0200
+Subject: [PATCH] ath9k: Switch to using mac80211 intermediate software queues.
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+This switches ath9k over to using the mac80211 intermediate software
+queueing mechanism for data packets. It removes the queueing inside the
+driver, except for the retry queue, and instead pulls from mac80211 when
+a packet is needed. The retry queue is used to store a packet that was
+pulled but can't be sent immediately.
+
+The old code path in ath_tx_start that would queue packets has been
+removed completely, as has the qlen limit tunables (since there's no
+longer a queue in the driver to limit).
+
+Based on Tim's original patch set, but reworked quite thoroughly.
+
+Cc: Tim Shepard <shep@alum.mit.edu>
+Cc: Felix Fietkau <nbd@nbd.name>
+Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk>
+---
+
+--- a/drivers/net/wireless/ath/ath9k/ath9k.h
++++ b/drivers/net/wireless/ath/ath9k/ath9k.h
+@@ -91,7 +91,6 @@ int ath_descdma_setup(struct ath_softc *
+ #define ATH_RXBUF 512
+ #define ATH_TXBUF 512
+ #define ATH_TXBUF_RESERVE 5
+-#define ATH_MAX_QDEPTH (ATH_TXBUF / 4 - ATH_TXBUF_RESERVE)
+ #define ATH_TXMAXTRY 13
+ #define ATH_MAX_SW_RETRIES 30
+
+@@ -145,7 +144,7 @@ int ath_descdma_setup(struct ath_softc *
+ #define BAW_WITHIN(_start, _bawsz, _seqno) \
+ ((((_seqno) - (_start)) & 4095) < (_bawsz))
+
+-#define ATH_AN_2_TID(_an, _tidno) (&(_an)->tid[(_tidno)])
++#define ATH_AN_2_TID(_an, _tidno) ath_node_to_tid(_an, _tidno)
+
+ #define IS_HT_RATE(rate) (rate & 0x80)
+ #define IS_CCK_RATE(rate) ((rate >= 0x18) && (rate <= 0x1e))
+@@ -164,7 +163,6 @@ struct ath_txq {
+ spinlock_t axq_lock;
+ u32 axq_depth;
+ u32 axq_ampdu_depth;
+- bool stopped;
+ bool axq_tx_inprogress;
+ struct list_head txq_fifo[ATH_TXFIFO_DEPTH];
+ u8 txq_headidx;
+@@ -232,7 +230,6 @@ struct ath_buf {
+
+ struct ath_atx_tid {
+ struct list_head list;
+- struct sk_buff_head buf_q;
+ struct sk_buff_head retry_q;
+ struct ath_node *an;
+ struct ath_txq *txq;
+@@ -247,13 +244,13 @@ struct ath_atx_tid {
+ s8 bar_index;
+ bool active;
+ bool clear_ps_filter;
++ bool has_queued;
+ };
+
+ struct ath_node {
+ struct ath_softc *sc;
+ 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];
+
+ u16 maxampdu;
+ u8 mpdudensity;
+@@ -276,7 +273,6 @@ struct ath_tx_control {
+ struct ath_node *an;
+ struct ieee80211_sta *sta;
+ u8 paprd;
+- bool force_channel;
+ };
+
+
+@@ -293,7 +289,6 @@ struct ath_tx {
+ struct ath_descdma txdma;
+ struct ath_txq *txq_map[IEEE80211_NUM_ACS];
+ struct ath_txq *uapsdq;
+- u32 txq_max_pending[IEEE80211_NUM_ACS];
+ u16 max_aggr_framelen[IEEE80211_NUM_ACS][4][32];
+ };
+
+@@ -421,6 +416,22 @@ struct ath_offchannel {
+ int duration;
+ };
+
++static inline struct ath_atx_tid *
++ath_node_to_tid(struct ath_node *an, u8 tidno)
++{
++ struct ieee80211_sta *sta = an->sta;
++ struct ieee80211_vif *vif = an->vif;
++ struct ieee80211_txq *txq;
++
++ BUG_ON(!vif);
++ if (sta)
++ txq = sta->txq[tidno % ARRAY_SIZE(sta->txq)];
++ else
++ txq = vif->txq;
++
++ return (struct ath_atx_tid *) txq->drv_priv;
++}
++
+ #define case_rtn_string(val) case val: return #val
+
+ #define ath_for_each_chanctx(_sc, _ctx) \
+@@ -575,7 +586,6 @@ void ath_tx_edma_tasklet(struct ath_soft
+ int ath_tx_aggr_start(struct ath_softc *sc, struct ieee80211_sta *sta,
+ u16 tid, u16 *ssn);
+ void ath_tx_aggr_stop(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid);
+-void ath_tx_aggr_resume(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid);
+
+ void ath_tx_aggr_wakeup(struct ath_softc *sc, struct ath_node *an);
+ void ath_tx_aggr_sleep(struct ieee80211_sta *sta, struct ath_softc *sc,
+@@ -585,6 +595,7 @@ void ath9k_release_buffered_frames(struc
+ u16 tids, int nframes,
+ enum ieee80211_frame_release_type reason,
+ bool more_data);
++void ath9k_wake_tx_queue(struct ieee80211_hw *hw, struct ieee80211_txq *queue);
+
+ /********/
+ /* VIFs */
+--- a/drivers/net/wireless/ath/ath9k/channel.c
++++ b/drivers/net/wireless/ath/ath9k/channel.c
+@@ -1007,7 +1007,6 @@ static void ath_scan_send_probe(struct a
+ goto error;
+
+ txctl.txq = sc->tx.txq_map[IEEE80211_AC_VO];
+- txctl.force_channel = true;
+ if (ath_tx_start(sc->hw, skb, &txctl))
+ goto error;
+
+@@ -1130,7 +1129,6 @@ ath_chanctx_send_vif_ps_frame(struct ath
+ memset(&txctl, 0, sizeof(txctl));
+ txctl.txq = sc->tx.txq_map[IEEE80211_AC_VO];
+ txctl.sta = sta;
+- txctl.force_channel = true;
+ if (ath_tx_start(sc->hw, skb, &txctl)) {
+ ieee80211_free_txskb(sc->hw, skb);
+ return false;
+--- a/drivers/net/wireless/ath/ath9k/debug.c
++++ b/drivers/net/wireless/ath/ath9k/debug.c
+@@ -600,7 +600,6 @@ static int read_file_xmit(struct seq_fil
+ PR("MPDUs XRetried: ", xretries);
+ PR("Aggregates: ", a_aggr);
+ PR("AMPDUs Queued HW:", a_queued_hw);
+- PR("AMPDUs Queued SW:", a_queued_sw);
+ PR("AMPDUs Completed:", a_completed);
+ PR("AMPDUs Retried: ", a_retries);
+ PR("AMPDUs XRetried: ", a_xretries);
+@@ -629,8 +628,7 @@ static void print_queue(struct ath_softc
+ seq_printf(file, "%s: %d ", "qnum", txq->axq_qnum);
+ seq_printf(file, "%s: %2d ", "qdepth", txq->axq_depth);
+ seq_printf(file, "%s: %2d ", "ampdu-depth", txq->axq_ampdu_depth);
+- seq_printf(file, "%s: %3d ", "pending", txq->pending_frames);
+- seq_printf(file, "%s: %d\n", "stopped", txq->stopped);
++ seq_printf(file, "%s: %3d\n", "pending", txq->pending_frames);
+
+ ath_txq_unlock(sc, txq);
+ }
+@@ -1208,7 +1206,6 @@ static const char ath9k_gstrings_stats[]
+ AMKSTR(d_tx_mpdu_xretries),
+ AMKSTR(d_tx_aggregates),
+ AMKSTR(d_tx_ampdus_queued_hw),
+- AMKSTR(d_tx_ampdus_queued_sw),
+ AMKSTR(d_tx_ampdus_completed),
+ AMKSTR(d_tx_ampdu_retries),
+ AMKSTR(d_tx_ampdu_xretries),
+@@ -1288,7 +1285,6 @@ void ath9k_get_et_stats(struct ieee80211
+ AWDATA(xretries);
+ AWDATA(a_aggr);
+ AWDATA(a_queued_hw);
+- AWDATA(a_queued_sw);
+ AWDATA(a_completed);
+ AWDATA(a_retries);
+ AWDATA(a_xretries);
+@@ -1346,14 +1342,6 @@ int ath9k_init_debug(struct ath_hw *ah)
+ read_file_xmit);
+ debugfs_create_devm_seqfile(sc->dev, "queues", sc->debug.debugfs_phy,
+ read_file_queues);
+- debugfs_create_u32("qlen_bk", S_IRUSR | S_IWUSR, sc->debug.debugfs_phy,
+- &sc->tx.txq_max_pending[IEEE80211_AC_BK]);
+- debugfs_create_u32("qlen_be", S_IRUSR | S_IWUSR, sc->debug.debugfs_phy,
+- &sc->tx.txq_max_pending[IEEE80211_AC_BE]);
+- debugfs_create_u32("qlen_vi", S_IRUSR | S_IWUSR, sc->debug.debugfs_phy,
+- &sc->tx.txq_max_pending[IEEE80211_AC_VI]);
+- debugfs_create_u32("qlen_vo", S_IRUSR | S_IWUSR, sc->debug.debugfs_phy,
+- &sc->tx.txq_max_pending[IEEE80211_AC_VO]);
+ debugfs_create_devm_seqfile(sc->dev, "misc", sc->debug.debugfs_phy,
+ read_file_misc);
+ debugfs_create_devm_seqfile(sc->dev, "reset", sc->debug.debugfs_phy,
+--- a/drivers/net/wireless/ath/ath9k/debug.h
++++ b/drivers/net/wireless/ath/ath9k/debug.h
+@@ -147,7 +147,6 @@ struct ath_interrupt_stats {
+ * @completed: Total MPDUs (non-aggr) completed
+ * @a_aggr: Total no. of aggregates queued
+ * @a_queued_hw: Total AMPDUs queued to hardware
+- * @a_queued_sw: Total AMPDUs queued to software queues
+ * @a_completed: Total AMPDUs completed
+ * @a_retries: No. of AMPDUs retried (SW)
+ * @a_xretries: No. of AMPDUs dropped due to xretries
+@@ -174,7 +173,6 @@ struct ath_tx_stats {
+ u32 xretries;
+ u32 a_aggr;
+ u32 a_queued_hw;
+- u32 a_queued_sw;
+ u32 a_completed;
+ u32 a_retries;
+ u32 a_xretries;
+--- a/drivers/net/wireless/ath/ath9k/debug_sta.c
++++ b/drivers/net/wireless/ath/ath9k/debug_sta.c
+@@ -52,8 +52,8 @@ static ssize_t read_file_node_aggr(struc
+ "TID", "SEQ_START", "SEQ_NEXT", "BAW_SIZE",
+ "BAW_HEAD", "BAW_TAIL", "BAR_IDX", "SCHED", "PAUSED");
+
+- for (tidno = 0, tid = &an->tid[tidno];
+- tidno < IEEE80211_NUM_TIDS; tidno++, tid++) {
++ for (tidno = 0; tidno < IEEE80211_NUM_TIDS; tidno++) {
++ tid = ath_node_to_tid(an, tidno);
+ txq = tid->txq;
+ ath_txq_lock(sc, txq);
+ if (tid->active) {
+--- a/drivers/net/wireless/ath/ath9k/init.c
++++ b/drivers/net/wireless/ath/ath9k/init.c
+@@ -358,7 +358,6 @@ static int ath9k_init_queues(struct ath_
+ for (i = 0; i < IEEE80211_NUM_ACS; i++) {
+ sc->tx.txq_map[i] = ath_txq_setup(sc, ATH9K_TX_QUEUE_DATA, i);
+ sc->tx.txq_map[i]->mac80211_qnum = i;
+- sc->tx.txq_max_pending[i] = ATH_MAX_QDEPTH;
+ }
+ return 0;
+ }
+@@ -873,6 +872,7 @@ static void ath9k_set_hw_capab(struct at
+ hw->max_rate_tries = 10;
+ hw->sta_data_size = sizeof(struct ath_node);
+ hw->vif_data_size = sizeof(struct ath_vif);
++ hw->txq_data_size = sizeof(struct ath_atx_tid);
+ hw->extra_tx_headroom = 4;
+
+ hw->wiphy->available_antennas_rx = BIT(ah->caps.max_rxchains) - 1;
+--- a/drivers/net/wireless/ath/ath9k/main.c
++++ b/drivers/net/wireless/ath/ath9k/main.c
+@@ -1897,9 +1897,11 @@ static int ath9k_ampdu_action(struct iee
+ bool flush = false;
+ int ret = 0;
+ struct ieee80211_sta *sta = params->sta;
++ struct ath_node *an = (struct ath_node *)sta->drv_priv;
+ enum ieee80211_ampdu_mlme_action action = params->action;
+ u16 tid = params->tid;
+ u16 *ssn = ¶ms->ssn;
++ struct ath_atx_tid *atid;
+
+ mutex_lock(&sc->mutex);
+
+@@ -1932,9 +1934,9 @@ static int ath9k_ampdu_action(struct iee
+ ath9k_ps_restore(sc);
+ break;
+ case IEEE80211_AMPDU_TX_OPERATIONAL:
+- ath9k_ps_wakeup(sc);
+- ath_tx_aggr_resume(sc, sta, tid);
+- ath9k_ps_restore(sc);
++ atid = ath_node_to_tid(an, tid);
++ atid->baw_size = IEEE80211_MIN_AMPDU_BUF <<
++ sta->ht_cap.ampdu_factor;
+ break;
+ default:
+ ath_err(ath9k_hw_common(sc->sc_ah), "Unknown AMPDU action\n");
+@@ -2696,4 +2698,5 @@ struct ieee80211_ops ath9k_ops = {
+ .sw_scan_start = ath9k_sw_scan_start,
+ .sw_scan_complete = ath9k_sw_scan_complete,
+ .get_txpower = ath9k_get_txpower,
++ .wake_tx_queue = ath9k_wake_tx_queue,
+ };
+--- a/drivers/net/wireless/ath/ath9k/xmit.c
++++ b/drivers/net/wireless/ath/ath9k/xmit.c
+@@ -67,6 +67,8 @@ static struct ath_buf *ath_tx_setup_buff
+ struct ath_txq *txq,
+ struct ath_atx_tid *tid,
+ struct sk_buff *skb);
++static int ath_tx_prepare(struct ieee80211_hw *hw, struct sk_buff *skb,
++ struct ath_tx_control *txctl);
+
+ enum {
+ MCS_HT20,
+@@ -137,6 +139,26 @@ static void ath_tx_queue_tid(struct ath_
+ list_add_tail(&tid->list, list);
+ }
+
++void ath9k_wake_tx_queue(struct ieee80211_hw *hw, struct ieee80211_txq *queue)
++{
++ struct ath_softc *sc = hw->priv;
++ struct ath_common *common = ath9k_hw_common(sc->sc_ah);
++ struct ath_atx_tid *tid = (struct ath_atx_tid *) queue->drv_priv;
++ struct ath_txq *txq = tid->txq;
++
++ ath_dbg(common, QUEUE, "Waking TX queue: %pM (%d)\n",
++ queue->sta ? queue->sta->addr : queue->vif->addr,
++ tid->tidno);
++
++ ath_txq_lock(sc, txq);
++
++ tid->has_queued = true;
++ ath_tx_queue_tid(sc, txq, tid);
++ ath_txq_schedule(sc, txq);
++
++ ath_txq_unlock(sc, txq);
++}
++
+ static struct ath_frame_info *get_frame_info(struct sk_buff *skb)
+ {
+ struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
+@@ -179,7 +201,6 @@ static void ath_set_rates(struct ieee802
+ static void ath_txq_skb_done(struct ath_softc *sc, struct ath_txq *txq,
+ struct sk_buff *skb)
+ {
+- struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ struct ath_frame_info *fi = get_frame_info(skb);
+ int q = fi->txq;
+
+@@ -190,14 +211,6 @@ static void ath_txq_skb_done(struct ath_
+ if (WARN_ON(--txq->pending_frames < 0))
+ txq->pending_frames = 0;
+
+- if (txq->stopped &&
+- txq->pending_frames < sc->tx.txq_max_pending[q]) {
+- if (ath9k_is_chanctx_enabled())
+- ieee80211_wake_queue(sc->hw, info->hw_queue);
+- else
+- ieee80211_wake_queue(sc->hw, q);
+- txq->stopped = false;
+- }
+ }
+
+ static struct ath_atx_tid *
+@@ -207,9 +220,48 @@ ath_get_skb_tid(struct ath_softc *sc, st
+ return ATH_AN_2_TID(an, tidno);
+ }
+
++static struct sk_buff *
++ath_tid_pull(struct ath_atx_tid *tid)
++{
++ struct ieee80211_txq *txq = container_of((void*)tid, struct ieee80211_txq, drv_priv);
++ struct ath_softc *sc = tid->an->sc;
++ struct ieee80211_hw *hw = sc->hw;
++ struct ath_tx_control txctl = {
++ .txq = tid->txq,
++ .sta = tid->an->sta,
++ };
++ struct sk_buff *skb;
++ struct ath_frame_info *fi;
++ int q;
++
++ if (!tid->has_queued)
++ return NULL;
++
++ skb = ieee80211_tx_dequeue(hw, txq);
++ if (!skb) {
++ tid->has_queued = false;
++ return NULL;
++ }
++
++ if (ath_tx_prepare(hw, skb, &txctl)) {
++ ieee80211_free_txskb(hw, skb);
++ return NULL;
++ }
++
++ q = skb_get_queue_mapping(skb);
++ if (tid->txq == sc->tx.txq_map[q]) {
++ fi = get_frame_info(skb);
++ fi->txq = q;
++ ++tid->txq->pending_frames;
++ }
++
++ return skb;
++ }
++
++
+ static bool ath_tid_has_buffered(struct ath_atx_tid *tid)
+ {
+- return !skb_queue_empty(&tid->buf_q) || !skb_queue_empty(&tid->retry_q);
++ return !skb_queue_empty(&tid->retry_q) || tid->has_queued;
+ }
+
+ static struct sk_buff *ath_tid_dequeue(struct ath_atx_tid *tid)
+@@ -218,46 +270,11 @@ static struct sk_buff *ath_tid_dequeue(s
+
+ skb = __skb_dequeue(&tid->retry_q);
+ if (!skb)
+- skb = __skb_dequeue(&tid->buf_q);
++ skb = ath_tid_pull(tid);
+
+ return skb;
+ }
+
+-/*
+- * ath_tx_tid_change_state:
+- * - clears a-mpdu flag of previous session
+- * - force sequence number allocation to fix next BlockAck Window
+- */
+-static void
+-ath_tx_tid_change_state(struct ath_softc *sc, struct ath_atx_tid *tid)
+-{
+- struct ath_txq *txq = tid->txq;
+- struct ieee80211_tx_info *tx_info;
+- struct sk_buff *skb, *tskb;
+- struct ath_buf *bf;
+- struct ath_frame_info *fi;
+-
+- skb_queue_walk_safe(&tid->buf_q, skb, tskb) {
+- fi = get_frame_info(skb);
+- bf = fi->bf;
+-
+- tx_info = IEEE80211_SKB_CB(skb);
+- tx_info->flags &= ~IEEE80211_TX_CTL_AMPDU;
+-
+- if (bf)
+- continue;
+-
+- bf = ath_tx_setup_buffer(sc, txq, tid, skb);
+- if (!bf) {
+- __skb_unlink(skb, &tid->buf_q);
+- ath_txq_skb_done(sc, txq, skb);
+- ieee80211_free_txskb(sc->hw, skb);
+- continue;
+- }
+- }
+-
+-}
+-
+ static void ath_tx_flush_tid(struct ath_softc *sc, struct ath_atx_tid *tid)
+ {
+ struct ath_txq *txq = tid->txq;
+@@ -898,20 +915,16 @@ static int ath_compute_num_delims(struct
+
+ static struct ath_buf *
+ ath_tx_get_tid_subframe(struct ath_softc *sc, struct ath_txq *txq,
+- struct ath_atx_tid *tid, struct sk_buff_head **q)
++ struct ath_atx_tid *tid)
+ {
+ struct ieee80211_tx_info *tx_info;
+ struct ath_frame_info *fi;
+- struct sk_buff *skb;
++ struct sk_buff *skb, *first_skb = NULL;
+ struct ath_buf *bf;
+ u16 seqno;
+
+ while (1) {
+- *q = &tid->retry_q;
+- if (skb_queue_empty(*q))
+- *q = &tid->buf_q;
+-
+- skb = skb_peek(*q);
++ skb = ath_tid_dequeue(tid);
+ if (!skb)
+ break;
+
+@@ -923,7 +936,6 @@ ath_tx_get_tid_subframe(struct ath_softc
+ bf->bf_state.stale = false;
+
+ if (!bf) {
+- __skb_unlink(skb, *q);
+ ath_txq_skb_done(sc, txq, skb);
+ ieee80211_free_txskb(sc->hw, skb);
+ continue;
+@@ -952,8 +964,19 @@ ath_tx_get_tid_subframe(struct ath_softc
+ seqno = bf->bf_state.seqno;
+
+ /* do not step over block-ack window */
+- if (!BAW_WITHIN(tid->seq_start, tid->baw_size, seqno))
++ if (!BAW_WITHIN(tid->seq_start, tid->baw_size, seqno)) {
++ __skb_queue_tail(&tid->retry_q, skb);
++
++ /* If there are other skbs in the retry q, they are
++ * probably within the BAW, so loop immediately to get
++ * one of them. Otherwise the queue can get stuck. */
++ if (!skb_queue_is_first(&tid->retry_q, skb) && skb != first_skb) {
++ if(!first_skb) /* infinite loop prevention */
++ first_skb = skb;
++ continue;
++ }
+ break;
++ }
+
+ if (tid->bar_index > ATH_BA_INDEX(tid->seq_start, seqno)) {
+ struct ath_tx_status ts = {};
+@@ -961,7 +984,6 @@ ath_tx_get_tid_subframe(struct ath_softc
+
+ INIT_LIST_HEAD(&bf_head);
+ list_add(&bf->list, &bf_head);
+- __skb_unlink(skb, *q);
+ ath_tx_update_baw(sc, tid, seqno);
+ ath_tx_complete_buf(sc, bf, txq, &bf_head, NULL, &ts, 0);
+ continue;
+@@ -973,11 +995,10 @@ ath_tx_get_tid_subframe(struct ath_softc
+ return NULL;
+ }
+
+-static bool
++static int
+ ath_tx_form_aggr(struct ath_softc *sc, struct ath_txq *txq,
+ struct ath_atx_tid *tid, struct list_head *bf_q,
+- struct ath_buf *bf_first, struct sk_buff_head *tid_q,
+- int *aggr_len)
++ struct ath_buf *bf_first)
+ {
+ #define PADBYTES(_len) ((4 - ((_len) % 4)) % 4)
+ struct ath_buf *bf = bf_first, *bf_prev = NULL;
+@@ -987,12 +1008,13 @@ ath_tx_form_aggr(struct ath_softc *sc, s
+ struct ieee80211_tx_info *tx_info;
+ struct ath_frame_info *fi;
+ struct sk_buff *skb;
+- bool closed = false;
++
+
+ bf = bf_first;
+ aggr_limit = ath_lookup_rate(sc, bf, tid);
+
+- do {
++ while (bf)
++ {
+ skb = bf->bf_mpdu;
+ fi = get_frame_info(skb);
+
+@@ -1001,12 +1023,12 @@ ath_tx_form_aggr(struct ath_softc *sc, s
+ if (nframes) {
+ if (aggr_limit < al + bpad + al_delta ||
+ ath_lookup_legacy(bf) || nframes >= h_baw)
+- break;
++ goto stop;
+
+ tx_info = IEEE80211_SKB_CB(bf->bf_mpdu);
+ if ((tx_info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) ||
+ !(tx_info->flags & IEEE80211_TX_CTL_AMPDU))
+- break;
++ goto stop;
+ }
+
+ /* add padding for previous frame to aggregation length */
+@@ -1028,20 +1050,18 @@ ath_tx_form_aggr(struct ath_softc *sc, s
+ ath_tx_addto_baw(sc, tid, bf);
+ bf->bf_state.ndelim = ndelim;
+
+- __skb_unlink(skb, tid_q);
+ list_add_tail(&bf->list, bf_q);
+ if (bf_prev)
+ bf_prev->bf_next = bf;
+
+ bf_prev = bf;
+
+- bf = ath_tx_get_tid_subframe(sc, txq, tid, &tid_q);
+- if (!bf) {
+- closed = true;
+- break;
+- }
+- } while (ath_tid_has_buffered(tid));
+-
++ bf = ath_tx_get_tid_subframe(sc, txq, tid);
++ }
++ goto finish;
++stop:
++ __skb_queue_tail(&tid->retry_q, bf->bf_mpdu);
++finish:
+ bf = bf_first;
+ bf->bf_lastbf = bf_prev;
+
+@@ -1052,9 +1072,7 @@ ath_tx_form_aggr(struct ath_softc *sc, s
+ TX_STAT_INC(txq->axq_qnum, a_aggr);
+ }
+
+- *aggr_len = al;
+-
+- return closed;
++ return al;
+ #undef PADBYTES
+ }
+
+@@ -1431,18 +1449,15 @@ static void ath_tx_fill_desc(struct ath_
+ static void
+ ath_tx_form_burst(struct ath_softc *sc, struct ath_txq *txq,
+ struct ath_atx_tid *tid, struct list_head *bf_q,
+- struct ath_buf *bf_first, struct sk_buff_head *tid_q)
++ struct ath_buf *bf_first)
+ {
+ struct ath_buf *bf = bf_first, *bf_prev = NULL;
+- struct sk_buff *skb;
+ int nframes = 0;
+
+ do {
+ struct ieee80211_tx_info *tx_info;
+- skb = bf->bf_mpdu;
+
+ nframes++;
+- __skb_unlink(skb, tid_q);
+ list_add_tail(&bf->list, bf_q);
+ if (bf_prev)
+ bf_prev->bf_next = bf;
+@@ -1451,13 +1466,15 @@ ath_tx_form_burst(struct ath_softc *sc,
+ if (nframes >= 2)
+ break;
+
+- bf = ath_tx_get_tid_subframe(sc, txq, tid, &tid_q);
++ bf = ath_tx_get_tid_subframe(sc, txq, tid);
+ if (!bf)
+ break;
+
+ tx_info = IEEE80211_SKB_CB(bf->bf_mpdu);
+- if (tx_info->flags & IEEE80211_TX_CTL_AMPDU)
++ if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) {
++ __skb_queue_tail(&tid->retry_q, bf->bf_mpdu);
+ break;
++ }
+
+ ath_set_rates(tid->an->vif, tid->an->sta, bf, false);
+ } while (1);
+@@ -1468,34 +1485,33 @@ static bool ath_tx_sched_aggr(struct ath
+ {
+ struct ath_buf *bf;
+ struct ieee80211_tx_info *tx_info;
+- struct sk_buff_head *tid_q;
+ struct list_head bf_q;
+ int aggr_len = 0;
+- bool aggr, last = true;
++ bool aggr;
+
+ if (!ath_tid_has_buffered(tid))
+ return false;
+
+ INIT_LIST_HEAD(&bf_q);
+
+- bf = ath_tx_get_tid_subframe(sc, txq, tid, &tid_q);
++ bf = ath_tx_get_tid_subframe(sc, txq, tid);
+ if (!bf)
+ return false;
+
+ tx_info = IEEE80211_SKB_CB(bf->bf_mpdu);
+ aggr = !!(tx_info->flags & IEEE80211_TX_CTL_AMPDU);
+ if ((aggr && txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH) ||
+- (!aggr && txq->axq_depth >= ATH_NON_AGGR_MIN_QDEPTH)) {
++ (!aggr && txq->axq_depth >= ATH_NON_AGGR_MIN_QDEPTH)) {
++ __skb_queue_tail(&tid->retry_q, bf->bf_mpdu);
+ *stop = true;
+ return false;
+ }
+
+ ath_set_rates(tid->an->vif, tid->an->sta, bf, false);
+ if (aggr)
+- last = ath_tx_form_aggr(sc, txq, tid, &bf_q, bf,
+- tid_q, &aggr_len);
++ aggr_len = ath_tx_form_aggr(sc, txq, tid, &bf_q, bf);
+ else
+- ath_tx_form_burst(sc, txq, tid, &bf_q, bf, tid_q);
++ ath_tx_form_burst(sc, txq, tid, &bf_q, bf);
+
+ if (list_empty(&bf_q))
+ return false;
+@@ -1538,9 +1554,6 @@ int ath_tx_aggr_start(struct ath_softc *
+ an->mpdudensity = density;
+ }
+
+- /* force sequence number allocation for pending frames */
+- ath_tx_tid_change_state(sc, txtid);
+-
+ txtid->active = true;
+ *ssn = txtid->seq_start = txtid->seq_next;
+ txtid->bar_index = -1;
+@@ -1565,7 +1578,6 @@ void ath_tx_aggr_stop(struct ath_softc *
+ ath_txq_lock(sc, txq);
+ txtid->active = false;
+ ath_tx_flush_tid(sc, txtid);
+- ath_tx_tid_change_state(sc, txtid);
+ ath_txq_unlock_complete(sc, txq);
+ }
+
+@@ -1575,14 +1587,12 @@ void ath_tx_aggr_sleep(struct ieee80211_
+ struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+ struct ath_atx_tid *tid;
+ struct ath_txq *txq;
+- bool buffered;
+ int tidno;
+
+ ath_dbg(common, XMIT, "%s called\n", __func__);
+
+- for (tidno = 0, tid = &an->tid[tidno];
+- tidno < IEEE80211_NUM_TIDS; tidno++, tid++) {
+-
++ for (tidno = 0; tidno < IEEE80211_NUM_TIDS; tidno++) {
++ tid = ath_node_to_tid(an, tidno);
+ txq = tid->txq;
+
+ ath_txq_lock(sc, txq);
+@@ -1592,13 +1602,12 @@ void ath_tx_aggr_sleep(struct ieee80211_
+ continue;
+ }
+
+- buffered = ath_tid_has_buffered(tid);
++ if (!skb_queue_empty(&tid->retry_q))
++ ieee80211_sta_set_buffered(sta, tid->tidno, true);
+
+ list_del_init(&tid->list);
+
+ ath_txq_unlock(sc, txq);
+-
+- ieee80211_sta_set_buffered(sta, tidno, buffered);
+ }
+ }
+
+@@ -1611,49 +1620,20 @@ void ath_tx_aggr_wakeup(struct ath_softc
+
+ ath_dbg(common, XMIT, "%s called\n", __func__);
+
+- for (tidno = 0, tid = &an->tid[tidno];
+- tidno < IEEE80211_NUM_TIDS; tidno++, tid++) {
+-
++ for (tidno = 0; tidno < IEEE80211_NUM_TIDS; tidno++) {
++ tid = ath_node_to_tid(an, tidno);
+ txq = tid->txq;
+
+ ath_txq_lock(sc, txq);
+ tid->clear_ps_filter = true;
+-
+ if (ath_tid_has_buffered(tid)) {
+ ath_tx_queue_tid(sc, txq, tid);
+ ath_txq_schedule(sc, txq);
+ }
+-
+ ath_txq_unlock_complete(sc, txq);
+ }
+ }
+
+-void ath_tx_aggr_resume(struct ath_softc *sc, struct ieee80211_sta *sta,
+- u16 tidno)
+-{
+- struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+- struct ath_atx_tid *tid;
+- struct ath_node *an;
+- struct ath_txq *txq;
+-
+- ath_dbg(common, XMIT, "%s called\n", __func__);
+-
+- an = (struct ath_node *)sta->drv_priv;
+- tid = ATH_AN_2_TID(an, tidno);
+- txq = tid->txq;
+-
+- ath_txq_lock(sc, txq);
+-
+- tid->baw_size = IEEE80211_MIN_AMPDU_BUF << sta->ht_cap.ampdu_factor;
+-
+- if (ath_tid_has_buffered(tid)) {
+- ath_tx_queue_tid(sc, txq, tid);
+- ath_txq_schedule(sc, txq);
+- }
+-
+- ath_txq_unlock_complete(sc, txq);
+-}
+-
+ void ath9k_release_buffered_frames(struct ieee80211_hw *hw,
+ struct ieee80211_sta *sta,
+ u16 tids, int nframes,
+@@ -1666,7 +1646,6 @@ void ath9k_release_buffered_frames(struc
+ struct ieee80211_tx_info *info;
+ struct list_head bf_q;
+ struct ath_buf *bf_tail = NULL, *bf;
+- struct sk_buff_head *tid_q;
+ int sent = 0;
+ int i;
+
+@@ -1681,11 +1660,10 @@ void ath9k_release_buffered_frames(struc
+
+ ath_txq_lock(sc, tid->txq);
+ while (nframes > 0) {
+- bf = ath_tx_get_tid_subframe(sc, sc->tx.uapsdq, tid, &tid_q);
++ bf = ath_tx_get_tid_subframe(sc, sc->tx.uapsdq, tid);
+ if (!bf)
+ break;
+
+- __skb_unlink(bf->bf_mpdu, tid_q);
+ list_add_tail(&bf->list, &bf_q);
+ ath_set_rates(tid->an->vif, tid->an->sta, bf, true);
+ if (bf_isampdu(bf)) {
+@@ -1700,7 +1678,7 @@ void ath9k_release_buffered_frames(struc
+ sent++;
+ TX_STAT_INC(txq->axq_qnum, a_queued_hw);
+
+- if (an->sta && !ath_tid_has_buffered(tid))
++ if (an->sta && skb_queue_empty(&tid->retry_q))
+ ieee80211_sta_set_buffered(an->sta, i, false);
+ }
+ ath_txq_unlock_complete(sc, tid->txq);
+@@ -1929,13 +1907,7 @@ bool ath_drain_all_txq(struct ath_softc
+ if (!ATH_TXQ_SETUP(sc, i))
+ continue;
+
+- /*
+- * The caller will resume queues with ieee80211_wake_queues.
+- * Mark the queue as not stopped to prevent ath_tx_complete
+- * from waking the queue too early.
+- */
+ txq = &sc->tx.txq[i];
+- txq->stopped = false;
+ ath_draintxq(sc, txq);
+ }
+
+@@ -2335,15 +2307,12 @@ int ath_tx_start(struct ieee80211_hw *hw
+ struct ath_txq *txq = txctl->txq;
+ struct ath_atx_tid *tid = NULL;
+ struct ath_buf *bf;
+- bool queue, ps_resp;
++ bool ps_resp;
+ int q, ret;
+
+ if (vif)
+ avp = (void *)vif->drv_priv;
+
+- if (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN)
+- txctl->force_channel = true;
+-
+ ps_resp = !!(info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE);
+
+ ret = ath_tx_prepare(hw, skb, txctl);
+@@ -2358,63 +2327,13 @@ int ath_tx_start(struct ieee80211_hw *hw
+
+ q = skb_get_queue_mapping(skb);
+
++ if (ps_resp)
++ txq = sc->tx.uapsdq;
++
+ ath_txq_lock(sc, txq);
+ if (txq == sc->tx.txq_map[q]) {
+ fi->txq = q;
+- if (++txq->pending_frames > sc->tx.txq_max_pending[q] &&
+- !txq->stopped) {
+- if (ath9k_is_chanctx_enabled())
+- ieee80211_stop_queue(sc->hw, info->hw_queue);
+- else
+- ieee80211_stop_queue(sc->hw, q);
+- txq->stopped = true;
+- }
+- }
+-
+- queue = ieee80211_is_data_present(hdr->frame_control);
+-
+- /* If chanctx, queue all null frames while NOA could be there */
+- if (ath9k_is_chanctx_enabled() &&
+- ieee80211_is_nullfunc(hdr->frame_control) &&
+- !txctl->force_channel)
+- queue = true;
+-
+- /* Force queueing of all frames that belong to a virtual interface on
+- * a different channel context, to ensure that they are sent on the
+- * correct channel.
+- */
+- if (((avp && avp->chanctx != sc->cur_chan) ||
+- sc->cur_chan->stopped) && !txctl->force_channel) {
+- if (!txctl->an)
+- txctl->an = &avp->mcast_node;
+- queue = true;
+- ps_resp = false;
+- }
+-
+- if (txctl->an && queue)
+- tid = ath_get_skb_tid(sc, txctl->an, skb);
+-
+- if (ps_resp) {
+- ath_txq_unlock(sc, txq);
+- txq = sc->tx.uapsdq;
+- ath_txq_lock(sc, txq);
+- } else if (txctl->an && queue) {
+- WARN_ON(tid->txq != txctl->txq);
+-
+- if (info->flags & IEEE80211_TX_CTL_CLEAR_PS_FILT)
+- tid->clear_ps_filter = true;
+-
+- /*
+- * Add this frame to software queue for scheduling later
+- * for aggregation.
+- */
+- TX_STAT_INC(txq->axq_qnum, a_queued_sw);
+- __skb_queue_tail(&tid->buf_q, skb);
+- if (!txctl->an->sleeping)
+- ath_tx_queue_tid(sc, txq, tid);
+-
+- ath_txq_schedule(sc, txq);
+- goto out;
++ ++txq->pending_frames;
+ }
+
+ bf = ath_tx_setup_buffer(sc, txq, tid, skb);
+@@ -2907,9 +2826,8 @@ void ath_tx_node_init(struct ath_softc *
+ struct ath_atx_tid *tid;
+ int tidno, acno;
+
+- for (tidno = 0, tid = &an->tid[tidno];
+- tidno < IEEE80211_NUM_TIDS;
+- tidno++, tid++) {
++ for (tidno = 0; tidno < IEEE80211_NUM_TIDS; tidno++) {
++ tid = ath_node_to_tid(an, tidno);
+ tid->an = an;
+ tid->tidno = tidno;
+ tid->seq_start = tid->seq_next = 0;
+@@ -2917,11 +2835,14 @@ void ath_tx_node_init(struct ath_softc *
+ tid->baw_head = tid->baw_tail = 0;
+ tid->active = false;
+ tid->clear_ps_filter = true;
+- __skb_queue_head_init(&tid->buf_q);
++ tid->has_queued = false;
+ __skb_queue_head_init(&tid->retry_q);
+ INIT_LIST_HEAD(&tid->list);
+ acno = TID_TO_WME_AC(tidno);
+ tid->txq = sc->tx.txq_map[acno];
++
++ if (!an->sta)
++ break; /* just one multicast ath_atx_tid */
+ }
+ }
+
+@@ -2931,9 +2852,8 @@ void ath_tx_node_cleanup(struct ath_soft
+ struct ath_txq *txq;
+ int tidno;
+
+- for (tidno = 0, tid = &an->tid[tidno];
+- tidno < IEEE80211_NUM_TIDS; tidno++, tid++) {
+-
++ for (tidno = 0; tidno < IEEE80211_NUM_TIDS; tidno++) {
++ tid = ath_node_to_tid(an, tidno);
+ txq = tid->txq;
+
+ ath_txq_lock(sc, txq);
+@@ -2945,6 +2865,9 @@ void ath_tx_node_cleanup(struct ath_soft
+ tid->active = false;
+
+ ath_txq_unlock(sc, txq);
++
++ if (!an->sta)
++ break; /* just one multicast ath_atx_tid */
+ }
+ }
+
projects / openwrt / staging / dangole.git / commitdiff