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ath9k: add some code to control internal driver queue length limits 

SVN-Revision: 27890
lede-17.01
Felix Fietkau 2011-08-04 00:35:20 +00:00
parent cdc70d84ce
commit e9aaa9061f
2 changed files with 457 additions and 0 deletions
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281
package/mac80211/patches/573-ath9k_aggr_queue_cleanup.patch Normal file
View File

@ -0,0 +1,281 @@
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -200,6 +200,7 @@ struct ath_atx_ac {
};
struct ath_frame_info {
+ struct ath_buf *bf;
int framelen;
u32 keyix;
enum ath9k_key_type keytype;
@@ -230,7 +231,7 @@ struct ath_buf {
struct ath_atx_tid {
struct list_head list;
- struct list_head buf_q;
+ struct sk_buff_head buf_q;
struct ath_node *an;
struct ath_atx_ac *ac;
unsigned long tx_buf[BITS_TO_LONGS(ATH_TID_MAX_BUFS)];
--- a/drivers/net/wireless/ath/ath9k/debug.c
+++ b/drivers/net/wireless/ath/ath9k/debug.c
@@ -711,7 +711,7 @@ static ssize_t read_file_stations(struct
" tid: %p %s %s %i %p %p\n",
tid, tid->sched ? "sched" : "idle",
tid->paused ? "paused" : "running",
- list_empty(&tid->buf_q),
+ skb_queue_empty(&tid->buf_q),
tid->an, tid->ac);
if (len >= size)
goto done;
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -128,7 +128,7 @@ static void ath_tx_resume_tid(struct ath
spin_lock_bh(&txq->axq_lock);
tid->paused = false;
- if (list_empty(&tid->buf_q))
+ if (skb_queue_empty(&tid->buf_q))
goto unlock;
ath_tx_queue_tid(txq, tid);
@@ -148,6 +148,7 @@ static struct ath_frame_info *get_frame_
static void ath_tx_flush_tid(struct ath_softc *sc, struct ath_atx_tid *tid)
{
struct ath_txq *txq = tid->ac->txq;
+ struct sk_buff *skb;
struct ath_buf *bf;
struct list_head bf_head;
struct ath_tx_status ts;
@@ -158,12 +159,13 @@ static void ath_tx_flush_tid(struct ath_
memset(&ts, 0, sizeof(ts));
spin_lock_bh(&txq->axq_lock);
- while (!list_empty(&tid->buf_q)) {
- bf = list_first_entry(&tid->buf_q, struct ath_buf, list);
- list_move_tail(&bf->list, &bf_head);
+ while ((skb = __skb_dequeue(&tid->buf_q))) {
+ fi = get_frame_info(skb);
+ bf = fi->bf;
+
+ list_add_tail(&bf->list, &bf_head);
spin_unlock_bh(&txq->axq_lock);
- fi = get_frame_info(bf->bf_mpdu);
if (fi->retries) {
ath_tx_update_baw(sc, tid, fi->seqno);
ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0);
@@ -218,6 +220,7 @@ static void ath_tid_drain(struct ath_sof
struct ath_atx_tid *tid)
{
+ struct sk_buff *skb;
struct ath_buf *bf;
struct list_head bf_head;
struct ath_tx_status ts;
@@ -226,14 +229,12 @@ static void ath_tid_drain(struct ath_sof
memset(&ts, 0, sizeof(ts));
INIT_LIST_HEAD(&bf_head);
- for (;;) {
- if (list_empty(&tid->buf_q))
- break;
+ while ((skb = __skb_dequeue(&tid->buf_q))) {
+ fi = get_frame_info(skb);
+ bf = fi->bf;
- bf = list_first_entry(&tid->buf_q, struct ath_buf, list);
- list_move_tail(&bf->list, &bf_head);
+ list_add_tail(&bf->list, &bf_head);
- fi = get_frame_info(bf->bf_mpdu);
if (fi->retries)
ath_tx_update_baw(sc, tid, fi->seqno);
@@ -351,7 +352,8 @@ static void ath_tx_complete_aggr(struct
struct ieee80211_tx_info *tx_info;
struct ath_atx_tid *tid = NULL;
struct ath_buf *bf_next, *bf_last = bf->bf_lastbf;
- struct list_head bf_head, bf_pending;
+ struct list_head bf_head;
+ struct sk_buff_head bf_pending;
u16 seq_st = 0, acked_cnt = 0, txfail_cnt = 0;
u32 ba[WME_BA_BMP_SIZE >> 5];
int isaggr, txfail, txpending, sendbar = 0, needreset = 0, nbad = 0;
@@ -428,8 +430,7 @@ static void ath_tx_complete_aggr(struct
}
}
- INIT_LIST_HEAD(&bf_pending);
- INIT_LIST_HEAD(&bf_head);
+ __skb_queue_head_init(&bf_pending);
ath_tx_count_frames(sc, bf, ts, txok, &nframes, &nbad);
while (bf) {
@@ -474,10 +475,10 @@ static void ath_tx_complete_aggr(struct
* Make sure the last desc is reclaimed if it
* not a holding desc.
*/
- if (!bf_last->bf_stale || bf_next != NULL)
+ INIT_LIST_HEAD(&bf_head);
+ if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) ||
+ bf_next != NULL || !bf_last->bf_stale)
list_move_tail(&bf->list, &bf_head);
- else
- INIT_LIST_HEAD(&bf_head);
if (!txpending || (tid->state & AGGR_CLEANUP)) {
/*
@@ -528,7 +529,7 @@ static void ath_tx_complete_aggr(struct
ath9k_hw_cleartxdesc(sc->sc_ah,
tbf->bf_desc);
- list_add_tail(&tbf->list, &bf_head);
+ fi->bf = tbf;
} else {
/*
* Clear descriptor status words for
@@ -543,21 +544,21 @@ static void ath_tx_complete_aggr(struct
* Put this buffer to the temporary pending
* queue to retain ordering
*/
- list_splice_tail_init(&bf_head, &bf_pending);
+ __skb_queue_tail(&bf_pending, skb);
}
bf = bf_next;
}
/* prepend un-acked frames to the beginning of the pending frame queue */
- if (!list_empty(&bf_pending)) {
+ if (!skb_queue_empty(&bf_pending)) {
if (an->sleeping)
ieee80211_sta_set_tim(sta);
spin_lock_bh(&txq->axq_lock);
if (clear_filter)
tid->ac->clear_ps_filter = true;
- list_splice(&bf_pending, &tid->buf_q);
+ skb_queue_splice(&bf_pending, &tid->buf_q);
if (!an->sleeping)
ath_tx_queue_tid(txq, tid);
spin_unlock_bh(&txq->axq_lock);
@@ -722,19 +723,22 @@ static enum ATH_AGGR_STATUS ath_tx_form_
int *aggr_len)
{
#define PADBYTES(_len) ((4 - ((_len) % 4)) % 4)
- struct ath_buf *bf, *bf_first, *bf_prev = NULL;
+ struct ath_buf *bf, *bf_first = NULL, *bf_prev = NULL;
int rl = 0, nframes = 0, ndelim, prev_al = 0;
u16 aggr_limit = 0, al = 0, bpad = 0,
al_delta, h_baw = tid->baw_size / 2;
enum ATH_AGGR_STATUS status = ATH_AGGR_DONE;
struct ieee80211_tx_info *tx_info;
struct ath_frame_info *fi;
-
- bf_first = list_first_entry(&tid->buf_q, struct ath_buf, list);
+ struct sk_buff *skb;
do {
- bf = list_first_entry(&tid->buf_q, struct ath_buf, list);
- fi = get_frame_info(bf->bf_mpdu);
+ skb = skb_peek(&tid->buf_q);
+ fi = get_frame_info(skb);
+ bf = fi->bf;
+
+ if (!bf_first)
+ bf_first = bf;
/* do not step over block-ack window */
if (!BAW_WITHIN(tid->seq_start, tid->baw_size, fi->seqno)) {
@@ -785,7 +789,9 @@ static enum ATH_AGGR_STATUS ath_tx_form_
if (!fi->retries)
ath_tx_addto_baw(sc, tid, fi->seqno);
ath9k_hw_set11n_aggr_middle(sc->sc_ah, bf->bf_desc, ndelim);
- list_move_tail(&bf->list, bf_q);
+
+ __skb_unlink(skb, &tid->buf_q);
+ list_add_tail(&bf->list, bf_q);
if (bf_prev) {
bf_prev->bf_next = bf;
ath9k_hw_set_desc_link(sc->sc_ah, bf_prev->bf_desc,
@@ -793,7 +799,7 @@ static enum ATH_AGGR_STATUS ath_tx_form_
}
bf_prev = bf;
- } while (!list_empty(&tid->buf_q));
+ } while (!skb_queue_empty(&tid->buf_q));
*aggr_len = al;
@@ -811,7 +817,7 @@ static void ath_tx_sched_aggr(struct ath
int aggr_len;
do {
- if (list_empty(&tid->buf_q))
+ if (skb_queue_empty(&tid->buf_q))
return;
INIT_LIST_HEAD(&bf_q);
@@ -933,7 +939,7 @@ bool ath_tx_aggr_sleep(struct ath_softc
spin_lock_bh(&txq->axq_lock);
- if (!list_empty(&tid->buf_q))
+ if (!skb_queue_empty(&tid->buf_q))
buffered = true;
tid->sched = false;
@@ -966,7 +972,7 @@ void ath_tx_aggr_wakeup(struct ath_softc
spin_lock_bh(&txq->axq_lock);
ac->clear_ps_filter = true;
- if (!list_empty(&tid->buf_q) && !tid->paused) {
+ if (!skb_queue_empty(&tid->buf_q) && !tid->paused) {
ath_tx_queue_tid(txq, tid);
ath_txq_schedule(sc, txq);
}
@@ -1308,7 +1314,7 @@ void ath_txq_schedule(struct ath_softc *
* add tid to round-robin queue if more frames
* are pending for the tid
*/
- if (!list_empty(&tid->buf_q))
+ if (!skb_queue_empty(&tid->buf_q))
ath_tx_queue_tid(txq, tid);
if (tid == last_tid ||
@@ -1414,7 +1420,7 @@ static void ath_tx_send_ampdu(struct ath
* - seqno is not within block-ack window
* - h/w queue depth exceeds low water mark
*/
- if (!list_empty(&tid->buf_q) || tid->paused ||
+ if (!skb_queue_empty(&tid->buf_q) || tid->paused ||
!BAW_WITHIN(tid->seq_start, tid->baw_size, fi->seqno) ||
txctl->txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH) {
/*
@@ -1422,7 +1428,7 @@ static void ath_tx_send_ampdu(struct ath
* for aggregation.
*/
TX_STAT_INC(txctl->txq->axq_qnum, a_queued_sw);
- list_add_tail(&bf->list, &tid->buf_q);
+ __skb_queue_tail(&tid->buf_q, bf->bf_mpdu);
if (!txctl->an || !txctl->an->sleeping)
ath_tx_queue_tid(txctl->txq, tid);
return;
@@ -1753,6 +1759,7 @@ static struct ath_buf *ath_tx_setup_buff
bf->bf_buf_addr,
txq->axq_qnum);
+ fi->bf = bf;
return bf;
}
@@ -2364,7 +2371,7 @@ void ath_tx_node_init(struct ath_softc *
tid->sched = false;
tid->paused = false;
tid->state &= ~AGGR_CLEANUP;
- INIT_LIST_HEAD(&tid->buf_q);
+ __skb_queue_head_init(&tid->buf_q);
acno = TID_TO_WME_AC(tidno);
tid->ac = &an->ac[acno];
tid->state &= ~AGGR_ADDBA_COMPLETE;

176
package/mac80211/patches/574-ath9k_limit_qlen.patch Normal file
View File

@ -0,0 +1,176 @@
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -235,6 +235,7 @@ struct ath_atx_tid {
struct ath_node *an;
struct ath_atx_ac *ac;
unsigned long tx_buf[BITS_TO_LONGS(ATH_TID_MAX_BUFS)];
+ int buf_pending;
u16 seq_start;
u16 seq_next;
u16 baw_size;
@@ -283,6 +284,9 @@ struct ath_tx_control {
* (axq_qnum).
*/
struct ath_tx {
+ u32 qlen_single;
+ u32 qlen_aggr;
+
u16 seq_no;
u32 txqsetup;
spinlock_t txbuflock;
--- a/drivers/net/wireless/ath/ath9k/debug.c
+++ b/drivers/net/wireless/ath/ath9k/debug.c
@@ -1250,6 +1250,10 @@ int ath9k_init_debug(struct ath_hw *ah)
sc, &fops_wiphy);
debugfs_create_file("xmit", S_IRUSR, sc->debug.debugfs_phy, sc,
&fops_xmit);
+ debugfs_create_u32("qlen_single", S_IRUSR | S_IWUSR,
+ sc->debug.debugfs_phy, &sc->tx.qlen_single);
+ debugfs_create_u32("qlen_aggr", S_IRUSR | S_IWUSR,
+ sc->debug.debugfs_phy, &sc->tx.qlen_aggr);
debugfs_create_file("stations", S_IRUSR, sc->debug.debugfs_phy, sc,
&fops_stations);
debugfs_create_file("misc", S_IRUSR, sc->debug.debugfs_phy, sc,
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -339,6 +339,14 @@ static void ath_tx_count_frames(struct a
}
}
+static struct ath_atx_tid *ath_get_tid(struct ath_node *an, struct sk_buff *skb)
+{
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+ u8 tidno;
+
+ tidno = ieee80211_get_qos_ctl(hdr)[0] & IEEE80211_QOS_CTL_TID_MASK;
+ return ATH_AN_2_TID(an, tidno);
+}
static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
struct ath_buf *bf, struct list_head *bf_q,
@@ -433,6 +441,8 @@ static void ath_tx_complete_aggr(struct
__skb_queue_head_init(&bf_pending);
ath_tx_count_frames(sc, bf, ts, txok, &nframes, &nbad);
+ tid->buf_pending -= nframes;
+
while (bf) {
txfail = txpending = 0;
bf_next = bf->bf_next;
@@ -790,6 +800,7 @@ static enum ATH_AGGR_STATUS ath_tx_form_
ath_tx_addto_baw(sc, tid, fi->seqno);
ath9k_hw_set11n_aggr_middle(sc->sc_ah, bf->bf_desc, ndelim);
+ tid->buf_pending++;
__skb_unlink(skb, &tid->buf_q);
list_add_tail(&bf->list, bf_q);
if (bf_prev) {
@@ -1441,6 +1452,8 @@ static void ath_tx_send_ampdu(struct ath
if (!fi->retries)
ath_tx_addto_baw(sc, tid, fi->seqno);
+ tid->buf_pending++;
+
/* Queue to h/w without aggregation */
TX_STAT_INC(txctl->txq->axq_qnum, a_queued_hw);
bf->bf_lastbf = bf;
@@ -1505,7 +1518,6 @@ static void setup_frame_info(struct ieee
struct ath_atx_tid *tid;
enum ath9k_key_type keytype;
u16 seqno = 0;
- u8 tidno;
keytype = ath9k_cmn_get_hw_crypto_keytype(skb);
@@ -1516,13 +1528,11 @@ static void setup_frame_info(struct ieee
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);
+ tid = ath_get_tid(an, skb);
seqno = tid->seq_next;
hdr->seq_ctrl = cpu_to_le16(seqno << IEEE80211_SEQ_SEQ_SHIFT);
INCR(tid->seq_next, IEEE80211_SEQ_MAX);
@@ -1766,24 +1776,14 @@ static struct ath_buf *ath_tx_setup_buff
/* FIXME: tx power */
static void ath_tx_start_dma(struct ath_softc *sc, struct ath_buf *bf,
- struct ath_tx_control *txctl)
+ struct ath_tx_control *txctl,
+ struct ath_atx_tid *tid)
{
struct sk_buff *skb = bf->bf_mpdu;
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct list_head bf_head;
- struct ath_atx_tid *tid = NULL;
- u8 tidno;
spin_lock_bh(&txctl->txq->axq_lock);
- if ((sc->sc_flags & SC_OP_TXAGGR) && txctl->an &&
- ieee80211_is_data_qos(hdr->frame_control)) {
- tidno = ieee80211_get_qos_ctl(hdr)[0] &
- IEEE80211_QOS_CTL_TID_MASK;
- tid = ATH_AN_2_TID(txctl->an, tidno);
-
- WARN_ON(tid->ac->txq != txctl->txq);
- }
if ((tx_info->flags & IEEE80211_TX_CTL_AMPDU) && tid) {
/*
@@ -1824,6 +1824,7 @@ int ath_tx_start(struct ieee80211_hw *hw
struct ieee80211_vif *vif = info->control.vif;
struct ath_softc *sc = hw->priv;
struct ath_txq *txq = txctl->txq;
+ struct ath_atx_tid *tid = NULL;
struct ath_buf *bf;
int padpos, padsize;
int frmlen = skb->len + FCS_LEN;
@@ -1857,6 +1858,7 @@ int ath_tx_start(struct ieee80211_hw *hw
skb_push(skb, padsize);
memmove(skb->data, skb->data + padsize, padpos);
+ hdr = (struct ieee80211_hdr *) skb->data;
}
if ((vif && vif->type != NL80211_IFTYPE_AP &&
@@ -1866,6 +1868,24 @@ int ath_tx_start(struct ieee80211_hw *hw
setup_frame_info(hw, skb, frmlen);
+ if ((sc->sc_flags & SC_OP_TXAGGR) && txctl->an &&
+ ieee80211_is_data_qos(hdr->frame_control)) {
+ tid = ath_get_tid(txctl->an, skb);
+
+ WARN_ON(tid->ac->txq != txq);
+ }
+
+ if ((info->flags & IEEE80211_TX_CTL_AMPDU) && tid) {
+ if (sc->tx.qlen_aggr > 0 && skb_queue_len(&tid->buf_q) +
+ tid->buf_pending >= sc->tx.qlen_aggr)
+ return -ENOMEM;
+ } else {
+ if (sc->tx.qlen_single > 0 &&
+ txq->axq_depth - txq->axq_ampdu_depth >=
+ sc->tx.qlen_single)
+ return -ENOMEM;
+ }
+
/*
* At this point, the vif, hw_key and sta pointers in the tx control
* info are no longer valid (overwritten by the ath_frame_info data.
@@ -1884,7 +1904,7 @@ int ath_tx_start(struct ieee80211_hw *hw
}
spin_unlock_bh(&txq->axq_lock);
- ath_tx_start_dma(sc, bf, txctl);
+ ath_tx_start_dma(sc, bf, txctl, tid);
return 0;
}