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path: root/drivers/net/wireless/ath/ath9k/xmit.c
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Diffstat (limited to 'drivers/net/wireless/ath/ath9k/xmit.c')
-rw-r--r--drivers/net/wireless/ath/ath9k/xmit.c193
1 files changed, 111 insertions, 82 deletions
diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c
index 4ccf48e396df..42551a48c8ac 100644
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -59,6 +59,7 @@ static void ath_tx_send_ht_normal(struct ath_softc *sc, struct ath_txq *txq,
struct ath_atx_tid *tid,
struct list_head *bf_head);
static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf,
+ struct ath_txq *txq,
struct list_head *bf_q,
int txok, int sendbar);
static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq,
@@ -73,18 +74,6 @@ static void ath_tx_rc_status(struct ath_buf *bf, struct ath_desc *ds,
/* Aggregation logic */
/*********************/
-static int ath_aggr_query(struct ath_softc *sc, struct ath_node *an, u8 tidno)
-{
- struct ath_atx_tid *tid;
- tid = ATH_AN_2_TID(an, tidno);
-
- if (tid->state & AGGR_ADDBA_COMPLETE ||
- tid->state & AGGR_ADDBA_PROGRESS)
- return 1;
- else
- return 0;
-}
-
static void ath_tx_queue_tid(struct ath_txq *txq, struct ath_atx_tid *tid)
{
struct ath_atx_ac *ac = tid->ac;
@@ -224,7 +213,7 @@ static void ath_tid_drain(struct ath_softc *sc, struct ath_txq *txq,
ath_tx_update_baw(sc, tid, bf->bf_seqno);
spin_unlock(&txq->axq_lock);
- ath_tx_complete_buf(sc, bf, &bf_head, 0, 0);
+ ath_tx_complete_buf(sc, bf, txq, &bf_head, 0, 0);
spin_lock(&txq->axq_lock);
}
@@ -232,13 +221,15 @@ static void ath_tid_drain(struct ath_softc *sc, struct ath_txq *txq,
tid->baw_tail = tid->baw_head;
}
-static void ath_tx_set_retry(struct ath_softc *sc, struct ath_buf *bf)
+static void ath_tx_set_retry(struct ath_softc *sc, struct ath_txq *txq,
+ struct ath_buf *bf)
{
struct sk_buff *skb;
struct ieee80211_hdr *hdr;
bf->bf_state.bf_type |= BUF_RETRY;
bf->bf_retries++;
+ TX_STAT_INC(txq->axq_qnum, a_retries);
skb = bf->bf_mpdu;
hdr = (struct ieee80211_hdr *)skb->data;
@@ -250,7 +241,10 @@ static struct ath_buf* ath_clone_txbuf(struct ath_softc *sc, struct ath_buf *bf)
struct ath_buf *tbf;
spin_lock_bh(&sc->tx.txbuflock);
- ASSERT(!list_empty((&sc->tx.txbuf)));
+ if (WARN_ON(list_empty(&sc->tx.txbuf))) {
+ spin_unlock_bh(&sc->tx.txbuflock);
+ return NULL;
+ }
tbf = list_first_entry(&sc->tx.txbuf, struct ath_buf, list);
list_del(&tbf->list);
spin_unlock_bh(&sc->tx.txbuflock);
@@ -337,7 +331,7 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
if (!(tid->state & AGGR_CLEANUP) &&
ds->ds_txstat.ts_flags != ATH9K_TX_SW_ABORTED) {
if (bf->bf_retries < ATH_MAX_SW_RETRIES) {
- ath_tx_set_retry(sc, bf);
+ ath_tx_set_retry(sc, txq, bf);
txpending = 1;
} else {
bf->bf_state.bf_type |= BUF_XRETRY;
@@ -384,13 +378,31 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
ath_tx_rc_status(bf, ds, nbad, txok, false);
}
- ath_tx_complete_buf(sc, bf, &bf_head, !txfail, sendbar);
+ ath_tx_complete_buf(sc, bf, txq, &bf_head, !txfail, sendbar);
} else {
/* retry the un-acked ones */
if (bf->bf_next == NULL && bf_last->bf_stale) {
struct ath_buf *tbf;
tbf = ath_clone_txbuf(sc, bf_last);
+ /*
+ * Update tx baw and complete the frame with
+ * failed status if we run out of tx buf
+ */
+ if (!tbf) {
+ spin_lock_bh(&txq->axq_lock);
+ ath_tx_update_baw(sc, tid,
+ bf->bf_seqno);
+ spin_unlock_bh(&txq->axq_lock);
+
+ bf->bf_state.bf_type |= BUF_XRETRY;
+ ath_tx_rc_status(bf, ds, nbad,
+ 0, false);
+ ath_tx_complete_buf(sc, bf, txq,
+ &bf_head, 0, 0);
+ break;
+ }
+
ath9k_hw_cleartxdesc(sc->sc_ah, tbf->bf_desc);
list_add_tail(&tbf->list, &bf_head);
} else {
@@ -414,7 +426,6 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
if (tid->state & AGGR_CLEANUP) {
if (tid->baw_head == tid->baw_tail) {
tid->state &= ~AGGR_ADDBA_COMPLETE;
- tid->addba_exchangeattempts = 0;
tid->state &= ~AGGR_CLEANUP;
/* send buffered frames as singles */
@@ -447,7 +458,7 @@ static u32 ath_lookup_rate(struct ath_softc *sc, struct ath_buf *bf,
struct ieee80211_tx_rate *rates;
struct ath_tx_info_priv *tx_info_priv;
u32 max_4ms_framelen, frmlen;
- u16 aggr_limit, legacy = 0, maxampdu;
+ u16 aggr_limit, legacy = 0;
int i;
skb = bf->bf_mpdu;
@@ -482,16 +493,20 @@ static u32 ath_lookup_rate(struct ath_softc *sc, struct ath_buf *bf,
if (tx_info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE || legacy)
return 0;
- aggr_limit = min(max_4ms_framelen, (u32)ATH_AMPDU_LIMIT_DEFAULT);
+ if (sc->sc_flags & SC_OP_BT_PRIORITY_DETECTED)
+ aggr_limit = min((max_4ms_framelen * 3) / 8,
+ (u32)ATH_AMPDU_LIMIT_MAX);
+ else
+ aggr_limit = min(max_4ms_framelen,
+ (u32)ATH_AMPDU_LIMIT_MAX);
/*
* h/w can accept aggregates upto 16 bit lengths (65535).
* The IE, however can hold upto 65536, which shows up here
* as zero. Ignore 65536 since we are constrained by hw.
*/
- maxampdu = tid->an->maxampdu;
- if (maxampdu)
- aggr_limit = min(aggr_limit, maxampdu);
+ if (tid->an->maxampdu)
+ aggr_limit = min(aggr_limit, tid->an->maxampdu);
return aggr_limit;
}
@@ -499,7 +514,6 @@ static u32 ath_lookup_rate(struct ath_softc *sc, struct ath_buf *bf,
/*
* Returns the number of delimiters to be added to
* meet the minimum required mpdudensity.
- * caller should make sure that the rate is HT rate .
*/
static int ath_compute_num_delims(struct ath_softc *sc, struct ath_atx_tid *tid,
struct ath_buf *bf, u16 frmlen)
@@ -507,7 +521,7 @@ static int ath_compute_num_delims(struct ath_softc *sc, struct ath_atx_tid *tid,
const struct ath_rate_table *rt = sc->cur_rate_table;
struct sk_buff *skb = bf->bf_mpdu;
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
- u32 nsymbits, nsymbols, mpdudensity;
+ u32 nsymbits, nsymbols;
u16 minlen;
u8 rc, flags, rix;
int width, half_gi, ndelim, mindelim;
@@ -529,14 +543,12 @@ static int ath_compute_num_delims(struct ath_softc *sc, struct ath_atx_tid *tid,
* on highest rate in rate series (i.e. first rate) to determine
* required minimum length for subframe. Take into account
* whether high rate is 20 or 40Mhz and half or full GI.
- */
- mpdudensity = tid->an->mpdudensity;
-
- /*
+ *
* If there is no mpdu density restriction, no further calculation
* is needed.
*/
- if (mpdudensity == 0)
+
+ if (tid->an->mpdudensity == 0)
return ndelim;
rix = tx_info->control.rates[0].idx;
@@ -546,9 +558,9 @@ static int ath_compute_num_delims(struct ath_softc *sc, struct ath_atx_tid *tid,
half_gi = (flags & IEEE80211_TX_RC_SHORT_GI) ? 1 : 0;
if (half_gi)
- nsymbols = NUM_SYMBOLS_PER_USEC_HALFGI(mpdudensity);
+ nsymbols = NUM_SYMBOLS_PER_USEC_HALFGI(tid->an->mpdudensity);
else
- nsymbols = NUM_SYMBOLS_PER_USEC(mpdudensity);
+ nsymbols = NUM_SYMBOLS_PER_USEC(tid->an->mpdudensity);
if (nsymbols == 0)
nsymbols = 1;
@@ -565,6 +577,7 @@ static int ath_compute_num_delims(struct ath_softc *sc, struct ath_atx_tid *tid,
}
static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc,
+ struct ath_txq *txq,
struct ath_atx_tid *tid,
struct list_head *bf_q)
{
@@ -629,6 +642,7 @@ static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc,
bf_prev->bf_desc->ds_link = bf->bf_daddr;
}
bf_prev = bf;
+
} while (!list_empty(&tid->buf_q));
bf_first->bf_al = al;
@@ -651,7 +665,7 @@ static void ath_tx_sched_aggr(struct ath_softc *sc, struct ath_txq *txq,
INIT_LIST_HEAD(&bf_q);
- status = ath_tx_form_aggr(sc, tid, &bf_q);
+ status = ath_tx_form_aggr(sc, txq, tid, &bf_q);
/*
* no frames picked up to be aggregated;
@@ -682,30 +696,26 @@ static void ath_tx_sched_aggr(struct ath_softc *sc, struct ath_txq *txq,
txq->axq_aggr_depth++;
ath_tx_txqaddbuf(sc, txq, &bf_q);
+ TX_STAT_INC(txq->axq_qnum, a_aggr);
} while (txq->axq_depth < ATH_AGGR_MIN_QDEPTH &&
status != ATH_AGGR_BAW_CLOSED);
}
-int ath_tx_aggr_start(struct ath_softc *sc, struct ieee80211_sta *sta,
- u16 tid, u16 *ssn)
+void ath_tx_aggr_start(struct ath_softc *sc, struct ieee80211_sta *sta,
+ u16 tid, u16 *ssn)
{
struct ath_atx_tid *txtid;
struct ath_node *an;
an = (struct ath_node *)sta->drv_priv;
-
- if (sc->sc_flags & SC_OP_TXAGGR) {
- txtid = ATH_AN_2_TID(an, tid);
- txtid->state |= AGGR_ADDBA_PROGRESS;
- ath_tx_pause_tid(sc, txtid);
- *ssn = txtid->seq_start;
- }
-
- return 0;
+ txtid = ATH_AN_2_TID(an, tid);
+ txtid->state |= AGGR_ADDBA_PROGRESS;
+ ath_tx_pause_tid(sc, txtid);
+ *ssn = txtid->seq_start;
}
-int ath_tx_aggr_stop(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid)
+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);
@@ -715,12 +725,11 @@ int ath_tx_aggr_stop(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid)
INIT_LIST_HEAD(&bf_head);
if (txtid->state & AGGR_CLEANUP)
- return 0;
+ return;
if (!(txtid->state & AGGR_ADDBA_COMPLETE)) {
txtid->state &= ~AGGR_ADDBA_PROGRESS;
- txtid->addba_exchangeattempts = 0;
- return 0;
+ return;
}
ath_tx_pause_tid(sc, txtid);
@@ -739,7 +748,7 @@ int ath_tx_aggr_stop(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid)
}
list_move_tail(&bf->list, &bf_head);
ath_tx_update_baw(sc, txtid, bf->bf_seqno);
- ath_tx_complete_buf(sc, bf, &bf_head, 0, 0);
+ ath_tx_complete_buf(sc, bf, txq, &bf_head, 0, 0);
}
spin_unlock_bh(&txq->axq_lock);
@@ -747,11 +756,8 @@ int ath_tx_aggr_stop(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid)
txtid->state |= AGGR_CLEANUP;
} else {
txtid->state &= ~AGGR_ADDBA_COMPLETE;
- txtid->addba_exchangeattempts = 0;
ath_tx_flush_tid(sc, txtid);
}
-
- return 0;
}
void ath_tx_aggr_resume(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid)
@@ -780,14 +786,8 @@ bool ath_tx_aggr_check(struct ath_softc *sc, struct ath_node *an, u8 tidno)
txtid = ATH_AN_2_TID(an, tidno);
- if (!(txtid->state & AGGR_ADDBA_COMPLETE)) {
- if (!(txtid->state & AGGR_ADDBA_PROGRESS) &&
- (txtid->addba_exchangeattempts < ADDBA_EXCHANGE_ATTEMPTS)) {
- txtid->addba_exchangeattempts++;
+ if (!(txtid->state & (AGGR_ADDBA_COMPLETE | AGGR_ADDBA_PROGRESS)))
return true;
- }
- }
-
return false;
}
@@ -870,14 +870,14 @@ struct ath_txq *ath_txq_setup(struct ath_softc *sc, int qtype, int subtype)
spin_lock_init(&txq->axq_lock);
txq->axq_depth = 0;
txq->axq_aggr_depth = 0;
- txq->axq_totalqueued = 0;
txq->axq_linkbuf = NULL;
+ txq->axq_tx_inprogress = false;
sc->tx.txqsetup |= 1<<qnum;
}
return &sc->tx.txq[qnum];
}
-static int ath_tx_get_qnum(struct ath_softc *sc, int qtype, int haltype)
+int ath_tx_get_qnum(struct ath_softc *sc, int qtype, int haltype)
{
int qnum;
@@ -1035,9 +1035,13 @@ void ath_draintxq(struct ath_softc *sc, struct ath_txq *txq, bool retry_tx)
if (bf_isampdu(bf))
ath_tx_complete_aggr(sc, txq, bf, &bf_head, 0);
else
- ath_tx_complete_buf(sc, bf, &bf_head, 0, 0);
+ ath_tx_complete_buf(sc, bf, txq, &bf_head, 0, 0);
}
+ spin_lock_bh(&txq->axq_lock);
+ txq->axq_tx_inprogress = false;
+ spin_unlock_bh(&txq->axq_lock);
+
/* flush any pending frames if aggregation is enabled */
if (sc->sc_flags & SC_OP_TXAGGR) {
if (!retry_tx) {
@@ -1118,8 +1122,7 @@ void ath_txq_schedule(struct ath_softc *sc, struct ath_txq *txq)
if (tid->paused)
continue;
- if ((txq->axq_depth % 2) == 0)
- ath_tx_sched_aggr(sc, txq, tid);
+ ath_tx_sched_aggr(sc, txq, tid);
/*
* add tid to round-robin queue if more frames
@@ -1183,7 +1186,6 @@ static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq,
list_splice_tail_init(head, &txq->axq_q);
txq->axq_depth++;
- txq->axq_totalqueued++;
txq->axq_linkbuf = list_entry(txq->axq_q.prev, struct ath_buf, list);
DPRINTF(sc, ATH_DBG_QUEUE,
@@ -1231,6 +1233,7 @@ static void ath_tx_send_ampdu(struct ath_softc *sc, struct ath_atx_tid *tid,
bf = list_first_entry(bf_head, struct ath_buf, list);
bf->bf_state.bf_type |= BUF_AMPDU;
+ TX_STAT_INC(txctl->txq->axq_qnum, a_queued);
/*
* Do not queue to h/w when any of the following conditions is true:
@@ -1277,6 +1280,7 @@ static void ath_tx_send_ht_normal(struct ath_softc *sc, struct ath_txq *txq,
bf->bf_lastbf = bf;
ath_buf_set_rate(sc, bf);
ath_tx_txqaddbuf(sc, txq, bf_head);
+ TX_STAT_INC(txq->axq_qnum, queued);
}
static void ath_tx_send_normal(struct ath_softc *sc, struct ath_txq *txq,
@@ -1290,6 +1294,7 @@ static void ath_tx_send_normal(struct ath_softc *sc, struct ath_txq *txq,
bf->bf_nframes = 1;
ath_buf_set_rate(sc, bf);
ath_tx_txqaddbuf(sc, txq, bf_head);
+ TX_STAT_INC(txq->axq_qnum, queued);
}
static enum ath9k_pkt_type get_hw_packet_type(struct sk_buff *skb)
@@ -1636,7 +1641,7 @@ static void ath_tx_start_dma(struct ath_softc *sc, struct ath_buf *bf,
goto tx_done;
}
- if (ath_aggr_query(sc, an, bf->bf_tidno)) {
+ if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) {
/*
* Try aggregation if it's a unicast data frame
* and the destination is HT capable.
@@ -1815,6 +1820,7 @@ static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb,
}
static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf,
+ struct ath_txq *txq,
struct list_head *bf_q,
int txok, int sendbar)
{
@@ -1822,7 +1828,6 @@ static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf,
unsigned long flags;
int tx_flags = 0;
-
if (sendbar)
tx_flags = ATH_TX_BAR;
@@ -1835,6 +1840,7 @@ static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf,
dma_unmap_single(sc->dev, bf->bf_dmacontext, skb->len, DMA_TO_DEVICE);
ath_tx_complete(sc, skb, tx_flags);
+ ath_debug_stat_tx(sc, txq, bf);
/*
* Return the list of ath_buf of this mpdu to free queue
@@ -1962,19 +1968,7 @@ static void ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq)
if (bf->bf_stale) {
bf_held = bf;
if (list_is_last(&bf_held->list, &txq->axq_q)) {
- txq->axq_link = NULL;
- txq->axq_linkbuf = NULL;
spin_unlock_bh(&txq->axq_lock);
-
- /*
- * The holding descriptor is the last
- * descriptor in queue. It's safe to remove
- * the last holding descriptor in BH context.
- */
- spin_lock_bh(&sc->tx.txbuflock);
- list_move_tail(&bf_held->list, &sc->tx.txbuf);
- spin_unlock_bh(&sc->tx.txbuflock);
-
break;
} else {
bf = list_entry(bf_held->list.next,
@@ -2011,6 +2005,7 @@ static void ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq)
txq->axq_aggr_depth--;
txok = (ds->ds_txstat.ts_status == 0);
+ txq->axq_tx_inprogress = false;
spin_unlock_bh(&txq->axq_lock);
if (bf_held) {
@@ -2033,7 +2028,7 @@ static void ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq)
if (bf_isampdu(bf))
ath_tx_complete_aggr(sc, txq, bf, &bf_head, txok);
else
- ath_tx_complete_buf(sc, bf, &bf_head, txok, 0);
+ ath_tx_complete_buf(sc, bf, txq, &bf_head, txok, 0);
ath_wake_mac80211_queue(sc, txq);
@@ -2044,6 +2039,40 @@ static void ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq)
}
}
+static void ath_tx_complete_poll_work(struct work_struct *work)
+{
+ struct ath_softc *sc = container_of(work, struct ath_softc,
+ tx_complete_work.work);
+ struct ath_txq *txq;
+ int i;
+ bool needreset = false;
+
+ for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++)
+ if (ATH_TXQ_SETUP(sc, i)) {
+ txq = &sc->tx.txq[i];
+ spin_lock_bh(&txq->axq_lock);
+ if (txq->axq_depth) {
+ if (txq->axq_tx_inprogress) {
+ needreset = true;
+ spin_unlock_bh(&txq->axq_lock);
+ break;
+ } else {
+ txq->axq_tx_inprogress = true;
+ }
+ }
+ spin_unlock_bh(&txq->axq_lock);
+ }
+
+ if (needreset) {
+ DPRINTF(sc, ATH_DBG_RESET, "tx hung, resetting the chip\n");
+ ath_reset(sc, false);
+ }
+
+ ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work,
+ msecs_to_jiffies(ATH_TX_COMPLETE_POLL_INT));
+}
+
+
void ath_tx_tasklet(struct ath_softc *sc)
{
@@ -2084,6 +2113,8 @@ int ath_tx_init(struct ath_softc *sc, int nbufs)
goto err;
}
+ INIT_DELAYED_WORK(&sc->tx_complete_work, ath_tx_complete_poll_work);
+
err:
if (error != 0)
ath_tx_cleanup(sc);
@@ -2122,7 +2153,6 @@ void ath_tx_node_init(struct ath_softc *sc, struct ath_node *an)
tid->ac = &an->ac[acno];
tid->state &= ~AGGR_ADDBA_COMPLETE;
tid->state &= ~AGGR_ADDBA_PROGRESS;
- tid->addba_exchangeattempts = 0;
}
for (acno = 0, ac = &an->ac[acno];
@@ -2179,7 +2209,6 @@ void ath_tx_node_cleanup(struct ath_softc *sc, struct ath_node *an)
tid->sched = false;
ath_tid_drain(sc, txq, tid);
tid->state &= ~AGGR_ADDBA_COMPLETE;
- tid->addba_exchangeattempts = 0;
tid->state &= ~AGGR_CLEANUP;
}
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.