diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/xmit.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/xmit.c | 3229 |
1 files changed, 1901 insertions, 1328 deletions
diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c index 42551a48c8a..7c28cb55610 100644 --- a/drivers/net/wireless/ath/ath9k/xmit.c +++ b/drivers/net/wireless/ath/ath9k/xmit.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2008-2009 Atheros Communications Inc. + * Copyright (c) 2008-2011 Atheros Communications Inc. * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above @@ -14,11 +14,12 @@ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ +#include <linux/dma-mapping.h> #include "ath9k.h" +#include "ar9003_mac.h" #define BITS_PER_BYTE 8 #define OFDM_PLCP_BITS 22 -#define HT_RC_2_MCS(_rc) ((_rc) & 0x0f) #define HT_RC_2_STREAMS(_rc) ((((_rc) & 0x78) >> 3) + 1) #define L_STF 8 #define L_LTF 8 @@ -28,12 +29,13 @@ #define HT_LTF(_ns) (4 * (_ns)) #define SYMBOL_TIME(_ns) ((_ns) << 2) /* ns * 4 us */ #define SYMBOL_TIME_HALFGI(_ns) (((_ns) * 18 + 4) / 5) /* ns * 3.6 us */ +#define TIME_SYMBOLS(t) ((t) >> 2) +#define TIME_SYMBOLS_HALFGI(t) (((t) * 5 - 4) / 18) #define NUM_SYMBOLS_PER_USEC(_usec) (_usec >> 2) #define NUM_SYMBOLS_PER_USEC_HALFGI(_usec) (((_usec*5)-4)/18) -#define OFDM_SIFS_TIME 16 -static u32 bits_per_symbol[][2] = { +static u16 bits_per_symbol[][2] = { /* 20MHz 40MHz */ { 26, 54 }, /* 0: BPSK */ { 52, 108 }, /* 1: QPSK 1/2 */ @@ -43,44 +45,68 @@ static u32 bits_per_symbol[][2] = { { 208, 432 }, /* 5: 64-QAM 2/3 */ { 234, 486 }, /* 6: 64-QAM 3/4 */ { 260, 540 }, /* 7: 64-QAM 5/6 */ - { 52, 108 }, /* 8: BPSK */ - { 104, 216 }, /* 9: QPSK 1/2 */ - { 156, 324 }, /* 10: QPSK 3/4 */ - { 208, 432 }, /* 11: 16-QAM 1/2 */ - { 312, 648 }, /* 12: 16-QAM 3/4 */ - { 416, 864 }, /* 13: 64-QAM 2/3 */ - { 468, 972 }, /* 14: 64-QAM 3/4 */ - { 520, 1080 }, /* 15: 64-QAM 5/6 */ }; -#define IS_HT_RATE(_rate) ((_rate) & 0x80) - -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_send_normal(struct ath_softc *sc, struct ath_txq *txq, + struct ath_atx_tid *tid, struct sk_buff *skb); +static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb, + int tx_flags, struct ath_txq *txq); 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); + struct ath_txq *txq, struct list_head *bf_q, + struct ath_tx_status *ts, int txok); static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq, - struct list_head *head); -static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf); -static int ath_tx_num_badfrms(struct ath_softc *sc, struct ath_buf *bf, - int txok); -static void ath_tx_rc_status(struct ath_buf *bf, struct ath_desc *ds, - int nbad, int txok, bool update_rc); + struct list_head *head, bool internal); +static void ath_tx_rc_status(struct ath_softc *sc, struct ath_buf *bf, + struct ath_tx_status *ts, int nframes, int nbad, + int txok); +static void ath_tx_update_baw(struct ath_softc *sc, struct ath_atx_tid *tid, + int seqno); +static struct ath_buf *ath_tx_setup_buffer(struct ath_softc *sc, + struct ath_txq *txq, + struct ath_atx_tid *tid, + struct sk_buff *skb); + +enum { + MCS_HT20, + MCS_HT20_SGI, + MCS_HT40, + MCS_HT40_SGI, +}; /*********************/ /* Aggregation logic */ /*********************/ +void ath_txq_lock(struct ath_softc *sc, struct ath_txq *txq) + __acquires(&txq->axq_lock) +{ + spin_lock_bh(&txq->axq_lock); +} + +void ath_txq_unlock(struct ath_softc *sc, struct ath_txq *txq) + __releases(&txq->axq_lock) +{ + spin_unlock_bh(&txq->axq_lock); +} + +void ath_txq_unlock_complete(struct ath_softc *sc, struct ath_txq *txq) + __releases(&txq->axq_lock) +{ + struct sk_buff_head q; + struct sk_buff *skb; + + __skb_queue_head_init(&q); + skb_queue_splice_init(&txq->complete_q, &q); + spin_unlock_bh(&txq->axq_lock); + + while ((skb = __skb_dequeue(&q))) + ieee80211_tx_status(sc->hw, skb); +} + static void ath_tx_queue_tid(struct ath_txq *txq, struct ath_atx_tid *tid) { struct ath_atx_ac *ac = tid->ac; - if (tid->paused) - return; - if (tid->sched) return; @@ -94,61 +120,147 @@ static void ath_tx_queue_tid(struct ath_txq *txq, struct ath_atx_tid *tid) list_add_tail(&ac->list, &txq->axq_acq); } -static void ath_tx_pause_tid(struct ath_softc *sc, struct ath_atx_tid *tid) +static struct ath_frame_info *get_frame_info(struct sk_buff *skb) { - struct ath_txq *txq = &sc->tx.txq[tid->ac->qnum]; + struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); + BUILD_BUG_ON(sizeof(struct ath_frame_info) > + sizeof(tx_info->rate_driver_data)); + return (struct ath_frame_info *) &tx_info->rate_driver_data[0]; +} - spin_lock_bh(&txq->axq_lock); - tid->paused++; - spin_unlock_bh(&txq->axq_lock); +static void ath_send_bar(struct ath_atx_tid *tid, u16 seqno) +{ + if (!tid->an->sta) + return; + + ieee80211_send_bar(tid->an->vif, tid->an->sta->addr, tid->tidno, + seqno << IEEE80211_SEQ_SEQ_SHIFT); } -static void ath_tx_resume_tid(struct ath_softc *sc, struct ath_atx_tid *tid) +static void ath_set_rates(struct ieee80211_vif *vif, struct ieee80211_sta *sta, + struct ath_buf *bf) { - struct ath_txq *txq = &sc->tx.txq[tid->ac->qnum]; + ieee80211_get_tx_rates(vif, sta, bf->bf_mpdu, bf->rates, + ARRAY_SIZE(bf->rates)); +} - ASSERT(tid->paused > 0); - spin_lock_bh(&txq->axq_lock); +static void ath_txq_skb_done(struct ath_softc *sc, struct ath_txq *txq, + struct sk_buff *skb) +{ + int q; - tid->paused--; + q = skb_get_queue_mapping(skb); + if (txq == sc->tx.uapsdq) + txq = sc->tx.txq_map[q]; - if (tid->paused > 0) - goto unlock; + if (txq != sc->tx.txq_map[q]) + return; - if (list_empty(&tid->buf_q)) - goto unlock; + if (WARN_ON(--txq->pending_frames < 0)) + txq->pending_frames = 0; + + if (txq->stopped && + txq->pending_frames < sc->tx.txq_max_pending[q]) { + ieee80211_wake_queue(sc->hw, q); + txq->stopped = false; + } +} + +static struct ath_atx_tid * +ath_get_skb_tid(struct ath_softc *sc, struct ath_node *an, struct sk_buff *skb) +{ + u8 tidno = skb->priority & IEEE80211_QOS_CTL_TID_MASK; + return ATH_AN_2_TID(an, tidno); +} + +static bool ath_tid_has_buffered(struct ath_atx_tid *tid) +{ + return !skb_queue_empty(&tid->buf_q) || !skb_queue_empty(&tid->retry_q); +} + +static struct sk_buff *ath_tid_dequeue(struct ath_atx_tid *tid) +{ + struct sk_buff *skb; + + skb = __skb_dequeue(&tid->retry_q); + if (!skb) + skb = __skb_dequeue(&tid->buf_q); + + 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->ac->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; + } + } - ath_tx_queue_tid(txq, tid); - ath_txq_schedule(sc, txq); -unlock: - spin_unlock_bh(&txq->axq_lock); } static void ath_tx_flush_tid(struct ath_softc *sc, struct ath_atx_tid *tid) { - struct ath_txq *txq = &sc->tx.txq[tid->ac->qnum]; + 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; + struct ath_frame_info *fi; + bool sendbar = false; + INIT_LIST_HEAD(&bf_head); - ASSERT(tid->paused > 0); - spin_lock_bh(&txq->axq_lock); + memset(&ts, 0, sizeof(ts)); - tid->paused--; + while ((skb = __skb_dequeue(&tid->retry_q))) { + fi = get_frame_info(skb); + bf = fi->bf; + if (!bf) { + ath_txq_skb_done(sc, txq, skb); + ieee80211_free_txskb(sc->hw, skb); + continue; + } - if (tid->paused > 0) { - spin_unlock_bh(&txq->axq_lock); - return; - } + if (fi->baw_tracked) { + ath_tx_update_baw(sc, tid, bf->bf_state.seqno); + sendbar = true; + } - while (!list_empty(&tid->buf_q)) { - bf = list_first_entry(&tid->buf_q, struct ath_buf, list); - ASSERT(!bf_isretried(bf)); - list_move_tail(&bf->list, &bf_head); - ath_tx_send_ht_normal(sc, txq, tid, &bf_head); + list_add_tail(&bf->list, &bf_head); + ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0); } - spin_unlock_bh(&txq->axq_lock); + if (sendbar) { + ath_txq_unlock(sc, txq); + ath_send_bar(tid, tid->seq_start); + ath_txq_lock(sc, txq); + } } static void ath_tx_update_baw(struct ath_softc *sc, struct ath_atx_tid *tid, @@ -159,27 +271,27 @@ static void ath_tx_update_baw(struct ath_softc *sc, struct ath_atx_tid *tid, index = ATH_BA_INDEX(tid->seq_start, seqno); cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); - tid->tx_buf[cindex] = NULL; + __clear_bit(cindex, tid->tx_buf); - while (tid->baw_head != tid->baw_tail && !tid->tx_buf[tid->baw_head]) { + while (tid->baw_head != tid->baw_tail && !test_bit(tid->baw_head, tid->tx_buf)) { INCR(tid->seq_start, IEEE80211_SEQ_MAX); INCR(tid->baw_head, ATH_TID_MAX_BUFS); + if (tid->bar_index >= 0) + tid->bar_index--; } } static void ath_tx_addto_baw(struct ath_softc *sc, struct ath_atx_tid *tid, struct ath_buf *bf) { + struct ath_frame_info *fi = get_frame_info(bf->bf_mpdu); + u16 seqno = bf->bf_state.seqno; int index, cindex; - if (bf_isretried(bf)) - return; - - index = ATH_BA_INDEX(tid->seq_start, bf->bf_seqno); + index = ATH_BA_INDEX(tid->seq_start, seqno); cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); - - ASSERT(tid->tx_buf[cindex] == NULL); - tid->tx_buf[cindex] = bf; + __set_bit(cindex, tid->tx_buf); + fi->baw_tracked = 1; if (index >= ((tid->baw_tail - tid->baw_head) & (ATH_TID_MAX_BUFS - 1))) { @@ -188,117 +300,209 @@ static void ath_tx_addto_baw(struct ath_softc *sc, struct ath_atx_tid *tid, } } -/* - * TODO: For frame(s) that are in the retry state, we will reuse the - * sequence number(s) without setting the retry bit. The - * alternative is to give up on these and BAR the receiver's window - * forward. - */ static void ath_tid_drain(struct ath_softc *sc, struct ath_txq *txq, struct ath_atx_tid *tid) { + struct sk_buff *skb; struct ath_buf *bf; struct list_head bf_head; - INIT_LIST_HEAD(&bf_head); + struct ath_tx_status ts; + struct ath_frame_info *fi; - for (;;) { - if (list_empty(&tid->buf_q)) - break; + memset(&ts, 0, sizeof(ts)); + INIT_LIST_HEAD(&bf_head); - bf = list_first_entry(&tid->buf_q, struct ath_buf, list); - list_move_tail(&bf->list, &bf_head); + while ((skb = ath_tid_dequeue(tid))) { + fi = get_frame_info(skb); + bf = fi->bf; - if (bf_isretried(bf)) - ath_tx_update_baw(sc, tid, bf->bf_seqno); + if (!bf) { + ath_tx_complete(sc, skb, ATH_TX_ERROR, txq); + continue; + } - spin_unlock(&txq->axq_lock); - ath_tx_complete_buf(sc, bf, txq, &bf_head, 0, 0); - spin_lock(&txq->axq_lock); + list_add_tail(&bf->list, &bf_head); + ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0); } - - tid->seq_next = tid->seq_start; - tid->baw_tail = tid->baw_head; } static void ath_tx_set_retry(struct ath_softc *sc, struct ath_txq *txq, - struct ath_buf *bf) + struct sk_buff *skb, int count) { - struct sk_buff *skb; + struct ath_frame_info *fi = get_frame_info(skb); + struct ath_buf *bf = fi->bf; struct ieee80211_hdr *hdr; + int prev = fi->retries; - bf->bf_state.bf_type |= BUF_RETRY; - bf->bf_retries++; TX_STAT_INC(txq->axq_qnum, a_retries); + fi->retries += count; + + if (prev > 0) + return; - skb = bf->bf_mpdu; hdr = (struct ieee80211_hdr *)skb->data; hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_RETRY); + dma_sync_single_for_device(sc->dev, bf->bf_buf_addr, + sizeof(*hdr), DMA_TO_DEVICE); } -static struct ath_buf* ath_clone_txbuf(struct ath_softc *sc, struct ath_buf *bf) +static struct ath_buf *ath_tx_get_buffer(struct ath_softc *sc) { - struct ath_buf *tbf; + struct ath_buf *bf = NULL; spin_lock_bh(&sc->tx.txbuflock); - if (WARN_ON(list_empty(&sc->tx.txbuf))) { + + if (unlikely(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); + + bf = list_first_entry(&sc->tx.txbuf, struct ath_buf, list); + list_del(&bf->list); + + spin_unlock_bh(&sc->tx.txbuflock); + + return bf; +} + +static void ath_tx_return_buffer(struct ath_softc *sc, struct ath_buf *bf) +{ + spin_lock_bh(&sc->tx.txbuflock); + list_add_tail(&bf->list, &sc->tx.txbuf); spin_unlock_bh(&sc->tx.txbuflock); +} + +static struct ath_buf* ath_clone_txbuf(struct ath_softc *sc, struct ath_buf *bf) +{ + struct ath_buf *tbf; + + tbf = ath_tx_get_buffer(sc); + if (WARN_ON(!tbf)) + return NULL; ATH_TXBUF_RESET(tbf); tbf->bf_mpdu = bf->bf_mpdu; tbf->bf_buf_addr = bf->bf_buf_addr; - *(tbf->bf_desc) = *(bf->bf_desc); + memcpy(tbf->bf_desc, bf->bf_desc, sc->sc_ah->caps.tx_desc_len); tbf->bf_state = bf->bf_state; - tbf->bf_dmacontext = bf->bf_dmacontext; + tbf->bf_state.stale = false; return tbf; } +static void ath_tx_count_frames(struct ath_softc *sc, struct ath_buf *bf, + struct ath_tx_status *ts, int txok, + int *nframes, int *nbad) +{ + struct ath_frame_info *fi; + u16 seq_st = 0; + u32 ba[WME_BA_BMP_SIZE >> 5]; + int ba_index; + int isaggr = 0; + + *nbad = 0; + *nframes = 0; + + isaggr = bf_isaggr(bf); + if (isaggr) { + seq_st = ts->ts_seqnum; + memcpy(ba, &ts->ba_low, WME_BA_BMP_SIZE >> 3); + } + + while (bf) { + fi = get_frame_info(bf->bf_mpdu); + ba_index = ATH_BA_INDEX(seq_st, bf->bf_state.seqno); + + (*nframes)++; + if (!txok || (isaggr && !ATH_BA_ISSET(ba, ba_index))) + (*nbad)++; + + bf = bf->bf_next; + } +} + + static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq, struct ath_buf *bf, struct list_head *bf_q, - int txok) + struct ath_tx_status *ts, int txok) { struct ath_node *an = NULL; struct sk_buff *skb; struct ieee80211_sta *sta; + struct ieee80211_hw *hw = sc->hw; struct ieee80211_hdr *hdr; + struct ieee80211_tx_info *tx_info; struct ath_atx_tid *tid = NULL; struct ath_buf *bf_next, *bf_last = bf->bf_lastbf; - struct ath_desc *ds = bf_last->bf_desc; - struct list_head bf_head, bf_pending; - u16 seq_st = 0, acked_cnt = 0, txfail_cnt = 0; + struct list_head bf_head; + struct sk_buff_head bf_pending; + u16 seq_st = 0, acked_cnt = 0, txfail_cnt = 0, seq_first; u32 ba[WME_BA_BMP_SIZE >> 5]; int isaggr, txfail, txpending, sendbar = 0, needreset = 0, nbad = 0; - bool rc_update = true; + bool rc_update = true, isba; + struct ieee80211_tx_rate rates[4]; + struct ath_frame_info *fi; + int nframes; + bool flush = !!(ts->ts_status & ATH9K_TX_FLUSH); + int i, retries; + int bar_index = -1; skb = bf->bf_mpdu; hdr = (struct ieee80211_hdr *)skb->data; + tx_info = IEEE80211_SKB_CB(skb); + + memcpy(rates, bf->rates, sizeof(rates)); + + retries = ts->ts_longretry + 1; + for (i = 0; i < ts->ts_rateindex; i++) + retries += rates[i].count; + rcu_read_lock(); - sta = ieee80211_find_sta(sc->hw, hdr->addr1); + sta = ieee80211_find_sta_by_ifaddr(hw, hdr->addr1, hdr->addr2); if (!sta) { rcu_read_unlock(); + + INIT_LIST_HEAD(&bf_head); + while (bf) { + bf_next = bf->bf_next; + + if (!bf->bf_state.stale || bf_next != NULL) + list_move_tail(&bf->list, &bf_head); + + ath_tx_complete_buf(sc, bf, txq, &bf_head, ts, 0); + + bf = bf_next; + } return; } an = (struct ath_node *)sta->drv_priv; - tid = ATH_AN_2_TID(an, bf->bf_tidno); + tid = ath_get_skb_tid(sc, an, skb); + seq_first = tid->seq_start; + isba = ts->ts_flags & ATH9K_TX_BA; + + /* + * The hardware occasionally sends a tx status for the wrong TID. + * In this case, the BA status cannot be considered valid and all + * subframes need to be retransmitted + * + * Only BlockAcks have a TID and therefore normal Acks cannot be + * checked + */ + if (isba && tid->tidno != ts->tid) + txok = false; isaggr = bf_isaggr(bf); memset(ba, 0, WME_BA_BMP_SIZE >> 3); if (isaggr && txok) { - if (ATH_DS_TX_BA(ds)) { - seq_st = ATH_DS_BA_SEQ(ds); - memcpy(ba, ATH_DS_BA_BITMAP(ds), - WME_BA_BMP_SIZE >> 3); + if (ts->ts_flags & ATH9K_TX_BA) { + seq_st = ts->ts_seqnum; + memcpy(ba, &ts->ba_low, WME_BA_BMP_SIZE >> 3); } else { /* * AR5416 can become deaf/mute when BA @@ -312,177 +516,240 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq, } } - INIT_LIST_HEAD(&bf_pending); - INIT_LIST_HEAD(&bf_head); + __skb_queue_head_init(&bf_pending); - nbad = ath_tx_num_badfrms(sc, bf, txok); + ath_tx_count_frames(sc, bf, ts, txok, &nframes, &nbad); while (bf) { - txfail = txpending = 0; + u16 seqno = bf->bf_state.seqno; + + txfail = txpending = sendbar = 0; bf_next = bf->bf_next; - if (ATH_BA_ISSET(ba, ATH_BA_INDEX(seq_st, bf->bf_seqno))) { + skb = bf->bf_mpdu; + tx_info = IEEE80211_SKB_CB(skb); + fi = get_frame_info(skb); + + if (!BAW_WITHIN(tid->seq_start, tid->baw_size, seqno) || + !tid->active) { + /* + * Outside of the current BlockAck window, + * maybe part of a previous session + */ + txfail = 1; + } else if (ATH_BA_ISSET(ba, ATH_BA_INDEX(seq_st, seqno))) { /* transmit completion, subframe is * acked by block ack */ acked_cnt++; } else if (!isaggr && txok) { /* transmit completion */ acked_cnt++; + } else if (flush) { + txpending = 1; + } else if (fi->retries < ATH_MAX_SW_RETRIES) { + if (txok || !an->sleeping) + ath_tx_set_retry(sc, txq, bf->bf_mpdu, + retries); + + txpending = 1; } else { - 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, txq, bf); - txpending = 1; - } else { - bf->bf_state.bf_type |= BUF_XRETRY; - txfail = 1; - sendbar = 1; - txfail_cnt++; - } - } else { - /* - * cleanup in progress, just fail - * the un-acked sub-frames - */ - txfail = 1; - } + txfail = 1; + txfail_cnt++; + bar_index = max_t(int, bar_index, + ATH_BA_INDEX(seq_first, seqno)); } - if (bf_next == NULL) { - /* - * Make sure the last desc is reclaimed if it - * not a holding desc. - */ - if (!bf_last->bf_stale) - list_move_tail(&bf->list, &bf_head); - else - INIT_LIST_HEAD(&bf_head); - } else { - ASSERT(!list_empty(bf_q)); + /* + * Make sure the last desc is reclaimed if it + * not a holding desc. + */ + INIT_LIST_HEAD(&bf_head); + if (bf_next != NULL || !bf_last->bf_state.stale) list_move_tail(&bf->list, &bf_head); - } if (!txpending) { /* * complete the acked-ones/xretried ones; update * block-ack window */ - spin_lock_bh(&txq->axq_lock); - ath_tx_update_baw(sc, tid, bf->bf_seqno); - spin_unlock_bh(&txq->axq_lock); + ath_tx_update_baw(sc, tid, seqno); if (rc_update && (acked_cnt == 1 || txfail_cnt == 1)) { - ath_tx_rc_status(bf, ds, nbad, txok, true); + memcpy(tx_info->control.rates, rates, sizeof(rates)); + ath_tx_rc_status(sc, bf, ts, nframes, nbad, txok); rc_update = false; - } else { - ath_tx_rc_status(bf, ds, nbad, txok, false); } - ath_tx_complete_buf(sc, bf, txq, &bf_head, !txfail, sendbar); + ath_tx_complete_buf(sc, bf, txq, &bf_head, ts, + !txfail); } else { + if (tx_info->flags & IEEE80211_TX_STATUS_EOSP) { + tx_info->flags &= ~IEEE80211_TX_STATUS_EOSP; + ieee80211_sta_eosp(sta); + } /* retry the un-acked ones */ - if (bf->bf_next == NULL && bf_last->bf_stale) { + if (bf->bf_next == NULL && bf_last->bf_state.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 + * 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_update_baw(sc, tid, seqno); + ath_tx_complete_buf(sc, bf, txq, - &bf_head, 0, 0); + &bf_head, ts, 0); + bar_index = max_t(int, bar_index, + ATH_BA_INDEX(seq_first, seqno)); break; } - ath9k_hw_cleartxdesc(sc->sc_ah, tbf->bf_desc); - list_add_tail(&tbf->list, &bf_head); - } else { - /* - * Clear descriptor status words for - * software retry - */ - ath9k_hw_cleartxdesc(sc->sc_ah, bf->bf_desc); + fi->bf = tbf; } /* * 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; } - if (tid->state & AGGR_CLEANUP) { - if (tid->baw_head == tid->baw_tail) { - tid->state &= ~AGGR_ADDBA_COMPLETE; - tid->state &= ~AGGR_CLEANUP; + /* prepend un-acked frames to the beginning of the pending frame queue */ + if (!skb_queue_empty(&bf_pending)) { + if (an->sleeping) + ieee80211_sta_set_buffered(sta, tid->tidno, true); + + skb_queue_splice_tail(&bf_pending, &tid->retry_q); + if (!an->sleeping) { + ath_tx_queue_tid(txq, tid); - /* send buffered frames as singles */ - ath_tx_flush_tid(sc, tid); + if (ts->ts_status & (ATH9K_TXERR_FILT | ATH9K_TXERR_XRETRY)) + tid->ac->clear_ps_filter = true; } - rcu_read_unlock(); - return; } - /* prepend un-acked frames to the beginning of the pending frame queue */ - if (!list_empty(&bf_pending)) { - spin_lock_bh(&txq->axq_lock); - list_splice(&bf_pending, &tid->buf_q); - ath_tx_queue_tid(txq, tid); - spin_unlock_bh(&txq->axq_lock); + if (bar_index >= 0) { + u16 bar_seq = ATH_BA_INDEX2SEQ(seq_first, bar_index); + + if (BAW_WITHIN(tid->seq_start, tid->baw_size, bar_seq)) + tid->bar_index = ATH_BA_INDEX(tid->seq_start, bar_seq); + + ath_txq_unlock(sc, txq); + ath_send_bar(tid, ATH_BA_INDEX2SEQ(seq_first, bar_index + 1)); + ath_txq_lock(sc, txq); } rcu_read_unlock(); if (needreset) - ath_reset(sc, false); + ath9k_queue_reset(sc, RESET_TYPE_TX_ERROR); +} + +static bool bf_is_ampdu_not_probing(struct ath_buf *bf) +{ + struct ieee80211_tx_info *info = IEEE80211_SKB_CB(bf->bf_mpdu); + return bf_isampdu(bf) && !(info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE); +} + +static void ath_tx_process_buffer(struct ath_softc *sc, struct ath_txq *txq, + struct ath_tx_status *ts, struct ath_buf *bf, + struct list_head *bf_head) +{ + struct ieee80211_tx_info *info; + bool txok, flush; + + txok = !(ts->ts_status & ATH9K_TXERR_MASK); + flush = !!(ts->ts_status & ATH9K_TX_FLUSH); + txq->axq_tx_inprogress = false; + + txq->axq_depth--; + if (bf_is_ampdu_not_probing(bf)) + txq->axq_ampdu_depth--; + + if (!bf_isampdu(bf)) { + if (!flush) { + info = IEEE80211_SKB_CB(bf->bf_mpdu); + memcpy(info->control.rates, bf->rates, + sizeof(info->control.rates)); + ath_tx_rc_status(sc, bf, ts, 1, txok ? 0 : 1, txok); + } + ath_tx_complete_buf(sc, bf, txq, bf_head, ts, txok); + } else + ath_tx_complete_aggr(sc, txq, bf, bf_head, ts, txok); + + if (!flush) + ath_txq_schedule(sc, txq); +} + +static bool ath_lookup_legacy(struct ath_buf *bf) +{ + struct sk_buff *skb; + struct ieee80211_tx_info *tx_info; + struct ieee80211_tx_rate *rates; + int i; + + skb = bf->bf_mpdu; + tx_info = IEEE80211_SKB_CB(skb); + rates = tx_info->control.rates; + + for (i = 0; i < 4; i++) { + if (!rates[i].count || rates[i].idx < 0) + break; + + if (!(rates[i].flags & IEEE80211_TX_RC_MCS)) + return true; + } + + return false; } static u32 ath_lookup_rate(struct ath_softc *sc, struct ath_buf *bf, struct ath_atx_tid *tid) { - const struct ath_rate_table *rate_table = sc->cur_rate_table; struct sk_buff *skb; struct ieee80211_tx_info *tx_info; struct ieee80211_tx_rate *rates; - struct ath_tx_info_priv *tx_info_priv; u32 max_4ms_framelen, frmlen; - u16 aggr_limit, legacy = 0; + u16 aggr_limit, bt_aggr_limit, legacy = 0; + int q = tid->ac->txq->mac80211_qnum; int i; skb = bf->bf_mpdu; tx_info = IEEE80211_SKB_CB(skb); - rates = tx_info->control.rates; - tx_info_priv = (struct ath_tx_info_priv *)tx_info->rate_driver_data[0]; + rates = bf->rates; /* * Find the lowest frame length among the rate series that will have a - * 4ms transmit duration. - * TODO - TXOP limit needs to be considered. + * 4ms (or TXOP limited) transmit duration. */ max_4ms_framelen = ATH_AMPDU_LIMIT_MAX; for (i = 0; i < 4; i++) { - if (rates[i].count) { - if (!WLAN_RC_PHY_HT(rate_table->info[rates[i].idx].phy)) { - legacy = 1; - break; - } + int modeidx; + + if (!rates[i].count) + continue; - frmlen = rate_table->info[rates[i].idx].max_4ms_framelen; - max_4ms_framelen = min(max_4ms_framelen, frmlen); + if (!(rates[i].flags & IEEE80211_TX_RC_MCS)) { + legacy = 1; + break; } + + if (rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) + modeidx = MCS_HT40; + else + modeidx = MCS_HT20; + + if (rates[i].flags & IEEE80211_TX_RC_SHORT_GI) + modeidx++; + + frmlen = sc->tx.max_aggr_framelen[q][modeidx][rates[i].idx]; + max_4ms_framelen = min(max_4ms_framelen, frmlen); } /* @@ -493,18 +760,15 @@ 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; - 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); + 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. + * Override the default aggregation limit for BTCOEX. */ + bt_aggr_limit = ath9k_btcoex_aggr_limit(sc, max_4ms_framelen); + if (bt_aggr_limit) + aggr_limit = bt_aggr_limit; + if (tid->an->maxampdu) aggr_limit = min(aggr_limit, tid->an->maxampdu); @@ -516,15 +780,15 @@ static u32 ath_lookup_rate(struct ath_softc *sc, struct ath_buf *bf, * meet the minimum required mpdudensity. */ static int ath_compute_num_delims(struct ath_softc *sc, struct ath_atx_tid *tid, - struct ath_buf *bf, u16 frmlen) + struct ath_buf *bf, u16 frmlen, + bool first_subfrm) { - 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); +#define FIRST_DESC_NDELIMS 60 u32 nsymbits, nsymbols; u16 minlen; - u8 rc, flags, rix; - int width, half_gi, ndelim, mindelim; + u8 flags, rix; + int width, streams, half_gi, ndelim, mindelim; + struct ath_frame_info *fi = get_frame_info(bf->bf_mpdu); /* Select standard number of delimiters based on frame length alone */ ndelim = ATH_AGGR_GET_NDELIM(frmlen); @@ -535,10 +799,19 @@ static int ath_compute_num_delims(struct ath_softc *sc, struct ath_atx_tid *tid, * TODO - this could be improved to be dependent on the rate. * The hardware can keep up at lower rates, but not higher rates */ - if (bf->bf_keytype != ATH9K_KEY_TYPE_CLEAR) + if ((fi->keyix != ATH9K_TXKEYIX_INVALID) && + !(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)) ndelim += ATH_AGGR_ENCRYPTDELIM; /* + * Add delimiter when using RTS/CTS with aggregation + * and non enterprise AR9003 card + */ + if (first_subfrm && !AR_SREV_9580_10_OR_LATER(sc->sc_ah) && + (sc->sc_ah->ent_mode & AR_ENT_OTP_MIN_PKT_SIZE_DISABLE)) + ndelim = max(ndelim, FIRST_DESC_NDELIMS); + + /* * Convert desired mpdu density from microeconds to bytes based * on highest rate in rate series (i.e. first rate) to determine * required minimum length for subframe. Take into account @@ -551,9 +824,8 @@ static int ath_compute_num_delims(struct ath_softc *sc, struct ath_atx_tid *tid, if (tid->an->mpdudensity == 0) return ndelim; - rix = tx_info->control.rates[0].idx; - flags = tx_info->control.rates[0].flags; - rc = rt->info[rix].ratecode; + rix = bf->rates[0].idx; + flags = bf->rates[0].flags; width = (flags & IEEE80211_TX_RC_40_MHZ_WIDTH) ? 1 : 0; half_gi = (flags & IEEE80211_TX_RC_SHORT_GI) ? 1 : 0; @@ -565,7 +837,8 @@ static int ath_compute_num_delims(struct ath_softc *sc, struct ath_atx_tid *tid, if (nsymbols == 0) nsymbols = 1; - nsymbits = bits_per_symbol[HT_RC_2_MCS(rc)][width]; + streams = HT_RC_2_STREAMS(rix); + nsymbits = bits_per_symbol[rix % 8][width] * streams; minlen = (nsymbols * nsymbits) / BITS_PER_BYTE; if (frmlen < minlen) { @@ -576,49 +849,118 @@ static int ath_compute_num_delims(struct ath_softc *sc, struct ath_atx_tid *tid, return ndelim; } -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) +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) { -#define PADBYTES(_len) ((4 - ((_len) % 4)) % 4) - struct ath_buf *bf, *bf_first, *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; - - bf_first = list_first_entry(&tid->buf_q, struct ath_buf, list); + struct ieee80211_tx_info *tx_info; + struct ath_frame_info *fi; + struct sk_buff *skb; + struct ath_buf *bf; + u16 seqno; - do { - bf = list_first_entry(&tid->buf_q, struct ath_buf, list); + while (1) { + *q = &tid->retry_q; + if (skb_queue_empty(*q)) + *q = &tid->buf_q; - /* do not step over block-ack window */ - if (!BAW_WITHIN(tid->seq_start, tid->baw_size, bf->bf_seqno)) { - status = ATH_AGGR_BAW_CLOSED; + skb = skb_peek(*q); + if (!skb) break; + + fi = get_frame_info(skb); + bf = fi->bf; + if (!fi->bf) + bf = ath_tx_setup_buffer(sc, txq, tid, skb); + else + 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; } - if (!rl) { - aggr_limit = ath_lookup_rate(sc, bf, tid); - rl = 1; + bf->bf_next = NULL; + bf->bf_lastbf = bf; + + tx_info = IEEE80211_SKB_CB(skb); + tx_info->flags &= ~IEEE80211_TX_CTL_CLEAR_PS_FILT; + + /* + * No aggregation session is running, but there may be frames + * from a previous session or a failed attempt in the queue. + * Send them out as normal data frames + */ + if (!tid->active) + tx_info->flags &= ~IEEE80211_TX_CTL_AMPDU; + + if (!(tx_info->flags & IEEE80211_TX_CTL_AMPDU)) { + bf->bf_state.bf_type = 0; + return bf; } - /* do not exceed aggregation limit */ - al_delta = ATH_AGGR_DELIM_SZ + bf->bf_frmlen; + bf->bf_state.bf_type = BUF_AMPDU | BUF_AGGR; + seqno = bf->bf_state.seqno; - if (nframes && - (aggr_limit < (al + bpad + al_delta + prev_al))) { - status = ATH_AGGR_LIMITED; + /* do not step over block-ack window */ + if (!BAW_WITHIN(tid->seq_start, tid->baw_size, seqno)) break; + + if (tid->bar_index > ATH_BA_INDEX(tid->seq_start, seqno)) { + struct ath_tx_status ts = {}; + struct list_head bf_head; + + 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, &ts, 0); + continue; } - /* do not exceed subframe limit */ - if (nframes >= min((int)h_baw, ATH_AMPDU_SUBFRAME_DEFAULT)) { - status = ATH_AGGR_LIMITED; - break; + return bf; + } + + return NULL; +} + +static bool +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) +{ +#define PADBYTES(_len) ((4 - ((_len) % 4)) % 4) + struct ath_buf *bf = bf_first, *bf_prev = NULL; + int nframes = 0, ndelim; + u16 aggr_limit = 0, al = 0, bpad = 0, + al_delta, h_baw = tid->baw_size / 2; + 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 { + skb = bf->bf_mpdu; + fi = get_frame_info(skb); + + /* do not exceed aggregation limit */ + al_delta = ATH_AGGR_DELIM_SZ + fi->framelen; + if (nframes) { + if (aggr_limit < al + bpad + al_delta || + ath_lookup_legacy(bf) || nframes >= h_baw) + break; + + 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; } - nframes++; /* add padding for previous frame to aggregation length */ al += bpad + al_delta; @@ -627,199 +969,643 @@ static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc, * Get the delimiters needed to meet the MPDU * density for this node. */ - ndelim = ath_compute_num_delims(sc, tid, bf_first, bf->bf_frmlen); + ndelim = ath_compute_num_delims(sc, tid, bf_first, fi->framelen, + !nframes); bpad = PADBYTES(al_delta) + (ndelim << 2); + nframes++; bf->bf_next = NULL; - bf->bf_desc->ds_link = 0; /* link buffers of this frame to the aggregate */ - ath_tx_addto_baw(sc, tid, bf); - ath9k_hw_set11n_aggr_middle(sc->sc_ah, bf->bf_desc, ndelim); - list_move_tail(&bf->list, bf_q); - if (bf_prev) { + if (!fi->baw_tracked) + 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_desc->ds_link = bf->bf_daddr; - } + bf_prev = bf; - } while (!list_empty(&tid->buf_q)); + bf = ath_tx_get_tid_subframe(sc, txq, tid, &tid_q); + if (!bf) { + closed = true; + break; + } + } while (ath_tid_has_buffered(tid)); + + bf = bf_first; + bf->bf_lastbf = bf_prev; - bf_first->bf_al = al; - bf_first->bf_nframes = nframes; + if (bf == bf_prev) { + al = get_frame_info(bf->bf_mpdu)->framelen; + bf->bf_state.bf_type = BUF_AMPDU; + } else { + TX_STAT_INC(txq->axq_qnum, a_aggr); + } - return status; + *aggr_len = al; + + return closed; #undef PADBYTES } -static void ath_tx_sched_aggr(struct ath_softc *sc, struct ath_txq *txq, - struct ath_atx_tid *tid) +/* + * rix - rate index + * pktlen - total bytes (delims + data + fcs + pads + pad delims) + * width - 0 for 20 MHz, 1 for 40 MHz + * half_gi - to use 4us v/s 3.6 us for symbol time + */ +static u32 ath_pkt_duration(struct ath_softc *sc, u8 rix, int pktlen, + int width, int half_gi, bool shortPreamble) { - struct ath_buf *bf; - enum ATH_AGGR_STATUS status; - struct list_head bf_q; + u32 nbits, nsymbits, duration, nsymbols; + int streams; - do { - if (list_empty(&tid->buf_q)) - return; + /* find number of symbols: PLCP + data */ + streams = HT_RC_2_STREAMS(rix); + nbits = (pktlen << 3) + OFDM_PLCP_BITS; + nsymbits = bits_per_symbol[rix % 8][width] * streams; + nsymbols = (nbits + nsymbits - 1) / nsymbits; + + if (!half_gi) + duration = SYMBOL_TIME(nsymbols); + else + duration = SYMBOL_TIME_HALFGI(nsymbols); + + /* addup duration for legacy/ht training and signal fields */ + duration += L_STF + L_LTF + L_SIG + HT_SIG + HT_STF + HT_LTF(streams); - INIT_LIST_HEAD(&bf_q); + return duration; +} + +static int ath_max_framelen(int usec, int mcs, bool ht40, bool sgi) +{ + int streams = HT_RC_2_STREAMS(mcs); + int symbols, bits; + int bytes = 0; + + usec -= L_STF + L_LTF + L_SIG + HT_SIG + HT_STF + HT_LTF(streams); + symbols = sgi ? TIME_SYMBOLS_HALFGI(usec) : TIME_SYMBOLS(usec); + bits = symbols * bits_per_symbol[mcs % 8][ht40] * streams; + bits -= OFDM_PLCP_BITS; + bytes = bits / 8; + if (bytes > 65532) + bytes = 65532; + + return bytes; +} + +void ath_update_max_aggr_framelen(struct ath_softc *sc, int queue, int txop) +{ + u16 *cur_ht20, *cur_ht20_sgi, *cur_ht40, *cur_ht40_sgi; + int mcs; + + /* 4ms is the default (and maximum) duration */ + if (!txop || txop > 4096) + txop = 4096; + + cur_ht20 = sc->tx.max_aggr_framelen[queue][MCS_HT20]; + cur_ht20_sgi = sc->tx.max_aggr_framelen[queue][MCS_HT20_SGI]; + cur_ht40 = sc->tx.max_aggr_framelen[queue][MCS_HT40]; + cur_ht40_sgi = sc->tx.max_aggr_framelen[queue][MCS_HT40_SGI]; + for (mcs = 0; mcs < 32; mcs++) { + cur_ht20[mcs] = ath_max_framelen(txop, mcs, false, false); + cur_ht20_sgi[mcs] = ath_max_framelen(txop, mcs, false, true); + cur_ht40[mcs] = ath_max_framelen(txop, mcs, true, false); + cur_ht40_sgi[mcs] = ath_max_framelen(txop, mcs, true, true); + } +} - status = ath_tx_form_aggr(sc, txq, tid, &bf_q); +static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf, + struct ath_tx_info *info, int len, bool rts) +{ + struct ath_hw *ah = sc->sc_ah; + struct ath_common *common = ath9k_hw_common(ah); + struct sk_buff *skb; + struct ieee80211_tx_info *tx_info; + struct ieee80211_tx_rate *rates; + const struct ieee80211_rate *rate; + struct ieee80211_hdr *hdr; + struct ath_frame_info *fi = get_frame_info(bf->bf_mpdu); + u32 rts_thresh = sc->hw->wiphy->rts_threshold; + int i; + u8 rix = 0; + + skb = bf->bf_mpdu; + tx_info = IEEE80211_SKB_CB(skb); + rates = bf->rates; + hdr = (struct ieee80211_hdr *)skb->data; + + /* set dur_update_en for l-sig computation except for PS-Poll frames */ + info->dur_update = !ieee80211_is_pspoll(hdr->frame_control); + info->rtscts_rate = fi->rtscts_rate; + + for (i = 0; i < ARRAY_SIZE(bf->rates); i++) { + bool is_40, is_sgi, is_sp; + int phy; + + if (!rates[i].count || (rates[i].idx < 0)) + continue; + + rix = rates[i].idx; + info->rates[i].Tries = rates[i].count; /* - * no frames picked up to be aggregated; - * block-ack window is not open. + * Handle RTS threshold for unaggregated HT frames. */ - if (list_empty(&bf_q)) - break; + if (bf_isampdu(bf) && !bf_isaggr(bf) && + (rates[i].flags & IEEE80211_TX_RC_MCS) && + unlikely(rts_thresh != (u32) -1)) { + if (!rts_thresh || (len > rts_thresh)) + rts = true; + } - bf = list_first_entry(&bf_q, struct ath_buf, list); - bf->bf_lastbf = list_entry(bf_q.prev, struct ath_buf, list); + if (rts || rates[i].flags & IEEE80211_TX_RC_USE_RTS_CTS) { + info->rates[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS; + info->flags |= ATH9K_TXDESC_RTSENA; + } else if (rates[i].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) { + info->rates[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS; + info->flags |= ATH9K_TXDESC_CTSENA; + } - /* if only one frame, send as non-aggregate */ - if (bf->bf_nframes == 1) { - bf->bf_state.bf_type &= ~BUF_AGGR; - ath9k_hw_clr11n_aggr(sc->sc_ah, bf->bf_desc); - ath_buf_set_rate(sc, bf); - ath_tx_txqaddbuf(sc, txq, &bf_q); + if (rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) + info->rates[i].RateFlags |= ATH9K_RATESERIES_2040; + if (rates[i].flags & IEEE80211_TX_RC_SHORT_GI) + info->rates[i].RateFlags |= ATH9K_RATESERIES_HALFGI; + + is_sgi = !!(rates[i].flags & IEEE80211_TX_RC_SHORT_GI); + is_40 = !!(rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH); + is_sp = !!(rates[i].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE); + + if (rates[i].flags & IEEE80211_TX_RC_MCS) { + /* MCS rates */ + info->rates[i].Rate = rix | 0x80; + info->rates[i].ChSel = ath_txchainmask_reduction(sc, + ah->txchainmask, info->rates[i].Rate); + info->rates[i].PktDuration = ath_pkt_duration(sc, rix, len, + is_40, is_sgi, is_sp); + if (rix < 8 && (tx_info->flags & IEEE80211_TX_CTL_STBC)) + info->rates[i].RateFlags |= ATH9K_RATESERIES_STBC; continue; } - /* setup first desc of aggregate */ - bf->bf_state.bf_type |= BUF_AGGR; - ath_buf_set_rate(sc, bf); - ath9k_hw_set11n_aggr_first(sc->sc_ah, bf->bf_desc, bf->bf_al); + /* legacy rates */ + rate = &common->sbands[tx_info->band].bitrates[rates[i].idx]; + if ((tx_info->band == IEEE80211_BAND_2GHZ) && + !(rate->flags & IEEE80211_RATE_ERP_G)) + phy = WLAN_RC_PHY_CCK; + else + phy = WLAN_RC_PHY_OFDM; + + info->rates[i].Rate = rate->hw_value; + if (rate->hw_value_short) { + if (rates[i].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) + info->rates[i].Rate |= rate->hw_value_short; + } else { + is_sp = false; + } + + if (bf->bf_state.bfs_paprd) + info->rates[i].ChSel = ah->txchainmask; + else + info->rates[i].ChSel = ath_txchainmask_reduction(sc, + ah->txchainmask, info->rates[i].Rate); - /* anchor last desc of aggregate */ - ath9k_hw_set11n_aggr_last(sc->sc_ah, bf->bf_lastbf->bf_desc); + info->rates[i].PktDuration = ath9k_hw_computetxtime(sc->sc_ah, + phy, rate->bitrate * 100, len, rix, is_sp); + } - txq->axq_aggr_depth++; - ath_tx_txqaddbuf(sc, txq, &bf_q); - TX_STAT_INC(txq->axq_qnum, a_aggr); + /* For AR5416 - RTS cannot be followed by a frame larger than 8K */ + if (bf_isaggr(bf) && (len > sc->sc_ah->caps.rts_aggr_limit)) + info->flags &= ~ATH9K_TXDESC_RTSENA; + + /* ATH9K_TXDESC_RTSENA and ATH9K_TXDESC_CTSENA are mutually exclusive. */ + if (info->flags & ATH9K_TXDESC_RTSENA) + info->flags &= ~ATH9K_TXDESC_CTSENA; +} + +static enum ath9k_pkt_type get_hw_packet_type(struct sk_buff *skb) +{ + struct ieee80211_hdr *hdr; + enum ath9k_pkt_type htype; + __le16 fc; + + hdr = (struct ieee80211_hdr *)skb->data; + fc = hdr->frame_control; + + if (ieee80211_is_beacon(fc)) + htype = ATH9K_PKT_TYPE_BEACON; + else if (ieee80211_is_probe_resp(fc)) + htype = ATH9K_PKT_TYPE_PROBE_RESP; + else if (ieee80211_is_atim(fc)) + htype = ATH9K_PKT_TYPE_ATIM; + else if (ieee80211_is_pspoll(fc)) + htype = ATH9K_PKT_TYPE_PSPOLL; + else + htype = ATH9K_PKT_TYPE_NORMAL; + + return htype; +} + +static void ath_tx_fill_desc(struct ath_softc *sc, struct ath_buf *bf, + struct ath_txq *txq, int len) +{ + struct ath_hw *ah = sc->sc_ah; + struct ath_buf *bf_first = NULL; + struct ath_tx_info info; + u32 rts_thresh = sc->hw->wiphy->rts_threshold; + bool rts = false; + + memset(&info, 0, sizeof(info)); + info.is_first = true; + info.is_last = true; + info.txpower = MAX_RATE_POWER; + info.qcu = txq->axq_qnum; + + while (bf) { + struct sk_buff *skb = bf->bf_mpdu; + struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); + struct ath_frame_info *fi = get_frame_info(skb); + bool aggr = !!(bf->bf_state.bf_type & BUF_AGGR); + + info.type = get_hw_packet_type(skb); + if (bf->bf_next) + info.link = bf->bf_next->bf_daddr; + else + info.link = (sc->tx99_state) ? bf->bf_daddr : 0; + + if (!bf_first) { + bf_first = bf; + + if (!sc->tx99_state) + info.flags = ATH9K_TXDESC_INTREQ; + if ((tx_info->flags & IEEE80211_TX_CTL_CLEAR_PS_FILT) || + txq == sc->tx.uapsdq) + info.flags |= ATH9K_TXDESC_CLRDMASK; + + if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK) + info.flags |= ATH9K_TXDESC_NOACK; + if (tx_info->flags & IEEE80211_TX_CTL_LDPC) + info.flags |= ATH9K_TXDESC_LDPC; + + if (bf->bf_state.bfs_paprd) + info.flags |= (u32) bf->bf_state.bfs_paprd << + ATH9K_TXDESC_PAPRD_S; + + /* + * mac80211 doesn't handle RTS threshold for HT because + * the decision has to be taken based on AMPDU length + * and aggregation is done entirely inside ath9k. + * Set the RTS/CTS flag for the first subframe based + * on the threshold. + */ + if (aggr && (bf == bf_first) && + unlikely(rts_thresh != (u32) -1)) { + /* + * "len" is the size of the entire AMPDU. + */ + if (!rts_thresh || (len > rts_thresh)) + rts = true; + } + + if (!aggr) + len = fi->framelen; + + ath_buf_set_rate(sc, bf, &info, len, rts); + } - } while (txq->axq_depth < ATH_AGGR_MIN_QDEPTH && - status != ATH_AGGR_BAW_CLOSED); + info.buf_addr[0] = bf->bf_buf_addr; + info.buf_len[0] = skb->len; + info.pkt_len = fi->framelen; + info.keyix = fi->keyix; + info.keytype = fi->keytype; + + if (aggr) { + if (bf == bf_first) + info.aggr = AGGR_BUF_FIRST; + else if (bf == bf_first->bf_lastbf) + info.aggr = AGGR_BUF_LAST; + else + info.aggr = AGGR_BUF_MIDDLE; + + info.ndelim = bf->bf_state.ndelim; + info.aggr_len = len; + } + + if (bf == bf_first->bf_lastbf) + bf_first = NULL; + + ath9k_hw_set_txdesc(ah, bf->bf_desc, &info); + bf = bf->bf_next; + } } -void ath_tx_aggr_start(struct ath_softc *sc, struct ieee80211_sta *sta, - u16 tid, u16 *ssn) +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 = 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; + bf_prev = bf; + + if (nframes >= 2) + break; + + bf = ath_tx_get_tid_subframe(sc, txq, tid, &tid_q); + if (!bf) + break; + + tx_info = IEEE80211_SKB_CB(bf->bf_mpdu); + if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) + break; + + ath_set_rates(tid->an->vif, tid->an->sta, bf); + } while (1); +} + +static bool ath_tx_sched_aggr(struct ath_softc *sc, struct ath_txq *txq, + struct ath_atx_tid *tid, bool *stop) +{ + 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; + + if (!ath_tid_has_buffered(tid)) + return false; + + INIT_LIST_HEAD(&bf_q); + + bf = ath_tx_get_tid_subframe(sc, txq, tid, &tid_q); + 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)) { + *stop = true; + return false; + } + + ath_set_rates(tid->an->vif, tid->an->sta, bf); + if (aggr) + last = ath_tx_form_aggr(sc, txq, tid, &bf_q, bf, + tid_q, &aggr_len); + else + ath_tx_form_burst(sc, txq, tid, &bf_q, bf, tid_q); + + if (list_empty(&bf_q)) + return false; + + if (tid->ac->clear_ps_filter || tid->an->no_ps_filter) { + tid->ac->clear_ps_filter = false; + tx_info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; + } + + ath_tx_fill_desc(sc, bf, txq, aggr_len); + ath_tx_txqaddbuf(sc, txq, &bf_q, false); + return true; +} + +int ath_tx_aggr_start(struct ath_softc *sc, struct ieee80211_sta *sta, + u16 tid, u16 *ssn) { struct ath_atx_tid *txtid; + struct ath_txq *txq; struct ath_node *an; + u8 density; an = (struct ath_node *)sta->drv_priv; txtid = ATH_AN_2_TID(an, tid); - txtid->state |= AGGR_ADDBA_PROGRESS; - ath_tx_pause_tid(sc, txtid); - *ssn = txtid->seq_start; + txq = txtid->ac->txq; + + ath_txq_lock(sc, txq); + + /* update ampdu factor/density, they may have changed. This may happen + * in HT IBSS when a beacon with HT-info is received after the station + * has already been added. + */ + if (sta->ht_cap.ht_supported) { + an->maxampdu = (1 << (IEEE80211_HT_MAX_AMPDU_FACTOR + + sta->ht_cap.ampdu_factor)) - 1; + density = ath9k_parse_mpdudensity(sta->ht_cap.ampdu_density); + 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; + + memset(txtid->tx_buf, 0, sizeof(txtid->tx_buf)); + txtid->baw_head = txtid->baw_tail = 0; + + ath_txq_unlock_complete(sc, txq); + + return 0; } 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 = &sc->tx.txq[txtid->ac->qnum]; - struct ath_buf *bf; - struct list_head bf_head; - INIT_LIST_HEAD(&bf_head); + struct ath_txq *txq = txtid->ac->txq; - if (txtid->state & AGGR_CLEANUP) - return; + 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); +} - if (!(txtid->state & AGGR_ADDBA_COMPLETE)) { - txtid->state &= ~AGGR_ADDBA_PROGRESS; - return; - } +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; - ath_tx_pause_tid(sc, txtid); + for (tidno = 0, tid = &an->tid[tidno]; + tidno < IEEE80211_NUM_TIDS; tidno++, tid++) { - /* drop all software retried frames and mark this TID */ - spin_lock_bh(&txq->axq_lock); - while (!list_empty(&txtid->buf_q)) { - bf = list_first_entry(&txtid->buf_q, struct ath_buf, list); - if (!bf_isretried(bf)) { - /* - * NB: it's based on the assumption that - * software retried frame will always stay - * at the head of software queue. - */ - break; + ac = tid->ac; + txq = ac->txq; + + ath_txq_lock(sc, txq); + + if (!tid->sched) { + ath_txq_unlock(sc, txq); + continue; } - list_move_tail(&bf->list, &bf_head); - ath_tx_update_baw(sc, txtid, bf->bf_seqno); - ath_tx_complete_buf(sc, bf, txq, &bf_head, 0, 0); + + buffered = ath_tid_has_buffered(tid); + + 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); } - spin_unlock_bh(&txq->axq_lock); +} - if (txtid->baw_head != txtid->baw_tail) { - txtid->state |= AGGR_CLEANUP; - } else { - txtid->state &= ~AGGR_ADDBA_COMPLETE; - ath_tx_flush_tid(sc, txtid); +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; + + ath_txq_lock(sc, txq); + ac->clear_ps_filter = true; + + if (ath_tid_has_buffered(tid)) { + ath_tx_queue_tid(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 tid) +void ath_tx_aggr_resume(struct ath_softc *sc, struct ieee80211_sta *sta, + u16 tidno) { - struct ath_atx_tid *txtid; + struct ath_atx_tid *tid; struct ath_node *an; + struct ath_txq *txq; an = (struct ath_node *)sta->drv_priv; + tid = ATH_AN_2_TID(an, tidno); + txq = tid->ac->txq; + + ath_txq_lock(sc, txq); - if (sc->sc_flags & SC_OP_TXAGGR) { - txtid = ATH_AN_2_TID(an, tid); - txtid->baw_size = - IEEE80211_MIN_AMPDU_BUF << sta->ht_cap.ampdu_factor; - txtid->state |= AGGR_ADDBA_COMPLETE; - txtid->state &= ~AGGR_ADDBA_PROGRESS; - ath_tx_resume_tid(sc, txtid); + tid->baw_size = IEEE80211_MIN_AMPDU_BUF << sta->ht_cap.ampdu_factor; + + if (ath_tid_has_buffered(tid)) { + ath_tx_queue_tid(txq, tid); + ath_txq_schedule(sc, txq); } + + ath_txq_unlock_complete(sc, txq); } -bool ath_tx_aggr_check(struct ath_softc *sc, struct ath_node *an, u8 tidno) +void ath9k_release_buffered_frames(struct ieee80211_hw *hw, + struct ieee80211_sta *sta, + u16 tids, int nframes, + enum ieee80211_frame_release_type reason, + bool more_data) { - struct ath_atx_tid *txtid; + struct ath_softc *sc = hw->priv; + struct ath_node *an = (struct ath_node *)sta->drv_priv; + struct ath_txq *txq = sc->tx.uapsdq; + 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; - if (!(sc->sc_flags & SC_OP_TXAGGR)) - return false; + INIT_LIST_HEAD(&bf_q); + for (i = 0; tids && nframes; i++, tids >>= 1) { + struct ath_atx_tid *tid; - txtid = ATH_AN_2_TID(an, tidno); + if (!(tids & 1)) + continue; - if (!(txtid->state & (AGGR_ADDBA_COMPLETE | AGGR_ADDBA_PROGRESS))) - return true; - return false; -} + tid = ATH_AN_2_TID(an, i); -/********************/ -/* Queue Management */ -/********************/ + ath_txq_lock(sc, tid->ac->txq); + while (nframes > 0) { + bf = ath_tx_get_tid_subframe(sc, sc->tx.uapsdq, tid, &tid_q); + if (!bf) + break; -static void ath_txq_drain_pending_buffers(struct ath_softc *sc, - struct ath_txq *txq) -{ - struct ath_atx_ac *ac, *ac_tmp; - struct ath_atx_tid *tid, *tid_tmp; + __skb_unlink(bf->bf_mpdu, tid_q); + list_add_tail(&bf->list, &bf_q); + ath_set_rates(tid->an->vif, tid->an->sta, bf); + if (bf_isampdu(bf)) { + ath_tx_addto_baw(sc, tid, bf); + bf->bf_state.bf_type &= ~BUF_AGGR; + } + if (bf_tail) + bf_tail->bf_next = bf; - list_for_each_entry_safe(ac, ac_tmp, &txq->axq_acq, list) { - list_del(&ac->list); - ac->sched = false; - list_for_each_entry_safe(tid, tid_tmp, &ac->tid_q, list) { - list_del(&tid->list); - tid->sched = false; - ath_tid_drain(sc, txq, tid); + bf_tail = bf; + nframes--; + sent++; + TX_STAT_INC(txq->axq_qnum, a_queued_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); } + + if (list_empty(&bf_q)) + return; + + info = IEEE80211_SKB_CB(bf_tail->bf_mpdu); + info->flags |= IEEE80211_TX_STATUS_EOSP; + + bf = list_first_entry(&bf_q, struct ath_buf, list); + ath_txq_lock(sc, txq); + ath_tx_fill_desc(sc, bf, txq, 0); + ath_tx_txqaddbuf(sc, txq, &bf_q, false); + ath_txq_unlock(sc, txq); } +/********************/ +/* Queue Management */ +/********************/ + struct ath_txq *ath_txq_setup(struct ath_softc *sc, int qtype, int subtype) { struct ath_hw *ah = sc->sc_ah; struct ath9k_tx_queue_info qi; - int qnum; + static const int subtype_txq_to_hwq[] = { + [IEEE80211_AC_BE] = ATH_TXQ_AC_BE, + [IEEE80211_AC_BK] = ATH_TXQ_AC_BK, + [IEEE80211_AC_VI] = ATH_TXQ_AC_VI, + [IEEE80211_AC_VO] = ATH_TXQ_AC_VO, + }; + int axq_qnum, i; memset(&qi, 0, sizeof(qi)); - qi.tqi_subtype = subtype; + qi.tqi_subtype = subtype_txq_to_hwq[subtype]; qi.tqi_aifs = ATH9K_TXQ_USEDEFAULT; qi.tqi_cwmin = ATH9K_TXQ_USEDEFAULT; qi.tqi_cwmax = ATH9K_TXQ_USEDEFAULT; @@ -840,92 +1626,43 @@ struct ath_txq *ath_txq_setup(struct ath_softc *sc, int qtype, int subtype) * The UAPSD queue is an exception, since we take a desc- * based intr on the EOSP frames. */ - if (qtype == ATH9K_TX_QUEUE_UAPSD) - qi.tqi_qflags = TXQ_FLAG_TXDESCINT_ENABLE; - else - qi.tqi_qflags = TXQ_FLAG_TXEOLINT_ENABLE | - TXQ_FLAG_TXDESCINT_ENABLE; - qnum = ath9k_hw_setuptxqueue(ah, qtype, &qi); - if (qnum == -1) { + if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { + qi.tqi_qflags = TXQ_FLAG_TXINT_ENABLE; + } else { + if (qtype == ATH9K_TX_QUEUE_UAPSD) + qi.tqi_qflags = TXQ_FLAG_TXDESCINT_ENABLE; + else + qi.tqi_qflags = TXQ_FLAG_TXEOLINT_ENABLE | + TXQ_FLAG_TXDESCINT_ENABLE; + } + axq_qnum = ath9k_hw_setuptxqueue(ah, qtype, &qi); + if (axq_qnum == -1) { /* * NB: don't print a message, this happens * normally on parts with too few tx queues */ return NULL; } - if (qnum >= ARRAY_SIZE(sc->tx.txq)) { - DPRINTF(sc, ATH_DBG_FATAL, - "qnum %u out of range, max %u!\n", - qnum, (unsigned int)ARRAY_SIZE(sc->tx.txq)); - ath9k_hw_releasetxqueue(ah, qnum); - return NULL; - } - if (!ATH_TXQ_SETUP(sc, qnum)) { - struct ath_txq *txq = &sc->tx.txq[qnum]; + if (!ATH_TXQ_SETUP(sc, axq_qnum)) { + struct ath_txq *txq = &sc->tx.txq[axq_qnum]; - txq->axq_qnum = qnum; + txq->axq_qnum = axq_qnum; + txq->mac80211_qnum = -1; txq->axq_link = NULL; + __skb_queue_head_init(&txq->complete_q); INIT_LIST_HEAD(&txq->axq_q); INIT_LIST_HEAD(&txq->axq_acq); spin_lock_init(&txq->axq_lock); txq->axq_depth = 0; - txq->axq_aggr_depth = 0; - txq->axq_linkbuf = NULL; + txq->axq_ampdu_depth = 0; txq->axq_tx_inprogress = false; - sc->tx.txqsetup |= 1<<qnum; - } - return &sc->tx.txq[qnum]; -} - -int ath_tx_get_qnum(struct ath_softc *sc, int qtype, int haltype) -{ - int qnum; + sc->tx.txqsetup |= 1<<axq_qnum; - switch (qtype) { - case ATH9K_TX_QUEUE_DATA: - if (haltype >= ARRAY_SIZE(sc->tx.hwq_map)) { - DPRINTF(sc, ATH_DBG_FATAL, - "HAL AC %u out of range, max %zu!\n", - haltype, ARRAY_SIZE(sc->tx.hwq_map)); - return -1; - } - qnum = sc->tx.hwq_map[haltype]; - break; - case ATH9K_TX_QUEUE_BEACON: - qnum = sc->beacon.beaconq; - break; - case ATH9K_TX_QUEUE_CAB: - qnum = sc->beacon.cabq->axq_qnum; - break; - default: - qnum = -1; + txq->txq_headidx = txq->txq_tailidx = 0; + for (i = 0; i < ATH_TXFIFO_DEPTH; i++) + INIT_LIST_HEAD(&txq->txq_fifo[i]); } - return qnum; -} - -struct ath_txq *ath_test_get_txq(struct ath_softc *sc, struct sk_buff *skb) -{ - struct ath_txq *txq = NULL; - int qnum; - - qnum = ath_get_hal_qnum(skb_get_queue_mapping(skb), sc); - txq = &sc->tx.txq[qnum]; - - spin_lock_bh(&txq->axq_lock); - - if (txq->axq_depth >= (ATH_TXBUF - 20)) { - DPRINTF(sc, ATH_DBG_XMIT, - "TX queue: %d is full, depth: %d\n", - qnum, txq->axq_depth); - ieee80211_stop_queue(sc->hw, skb_get_queue_mapping(skb)); - txq->stopped = 1; - spin_unlock_bh(&txq->axq_lock); - return NULL; - } - - spin_unlock_bh(&txq->axq_lock); - - return txq; + return &sc->tx.txq[axq_qnum]; } int ath_txq_update(struct ath_softc *sc, int qnum, @@ -935,17 +1672,7 @@ int ath_txq_update(struct ath_softc *sc, int qnum, int error = 0; struct ath9k_tx_queue_info qi; - if (qnum == sc->beacon.beaconq) { - /* - * XXX: for beacon queue, we just save the parameter. - * It will be picked up by ath_beaconq_config when - * it's necessary. - */ - sc->beacon.beacon_qi = *qinfo; - return 0; - } - - ASSERT(sc->tx.txq[qnum].axq_qnum == qnum); + BUG_ON(sc->tx.txq[qnum].axq_qnum != qnum); ath9k_hw_get_txq_props(ah, qnum, &qi); qi.tqi_aifs = qinfo->tqi_aifs; @@ -955,7 +1682,7 @@ int ath_txq_update(struct ath_softc *sc, int qnum, qi.tqi_readyTime = qinfo->tqi_readyTime; if (!ath9k_hw_set_txq_props(ah, qnum, &qi)) { - DPRINTF(sc, ATH_DBG_FATAL, + ath_err(ath9k_hw_common(sc->sc_ah), "Unable to update hardware queue %u!\n", qnum); error = -EIO; } else { @@ -968,129 +1695,116 @@ int ath_txq_update(struct ath_softc *sc, int qnum, int ath_cabq_update(struct ath_softc *sc) { struct ath9k_tx_queue_info qi; + struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf; int qnum = sc->beacon.cabq->axq_qnum; ath9k_hw_get_txq_props(sc->sc_ah, qnum, &qi); - /* - * Ensure the readytime % is within the bounds. - */ - if (sc->config.cabqReadytime < ATH9K_READY_TIME_LO_BOUND) - sc->config.cabqReadytime = ATH9K_READY_TIME_LO_BOUND; - else if (sc->config.cabqReadytime > ATH9K_READY_TIME_HI_BOUND) - sc->config.cabqReadytime = ATH9K_READY_TIME_HI_BOUND; - qi.tqi_readyTime = (sc->beacon_interval * - sc->config.cabqReadytime) / 100; + qi.tqi_readyTime = (TU_TO_USEC(cur_conf->beacon_interval) * + ATH_CABQ_READY_TIME) / 100; ath_txq_update(sc, qnum, &qi); return 0; } -/* - * Drain a given TX queue (could be Beacon or Data) - * - * This assumes output has been stopped and - * we do not need to block ath_tx_tasklet. - */ -void ath_draintxq(struct ath_softc *sc, struct ath_txq *txq, bool retry_tx) +static void ath_drain_txq_list(struct ath_softc *sc, struct ath_txq *txq, + struct list_head *list) { struct ath_buf *bf, *lastbf; struct list_head bf_head; + struct ath_tx_status ts; + memset(&ts, 0, sizeof(ts)); + ts.ts_status = ATH9K_TX_FLUSH; INIT_LIST_HEAD(&bf_head); - for (;;) { - spin_lock_bh(&txq->axq_lock); + while (!list_empty(list)) { + bf = list_first_entry(list, struct ath_buf, list); - if (list_empty(&txq->axq_q)) { - txq->axq_link = NULL; - txq->axq_linkbuf = NULL; - spin_unlock_bh(&txq->axq_lock); - break; - } - - bf = list_first_entry(&txq->axq_q, struct ath_buf, list); - - if (bf->bf_stale) { + if (bf->bf_state.stale) { list_del(&bf->list); - spin_unlock_bh(&txq->axq_lock); - spin_lock_bh(&sc->tx.txbuflock); - list_add_tail(&bf->list, &sc->tx.txbuf); - spin_unlock_bh(&sc->tx.txbuflock); + ath_tx_return_buffer(sc, bf); continue; } lastbf = bf->bf_lastbf; - if (!retry_tx) - lastbf->bf_desc->ds_txstat.ts_flags = - ATH9K_TX_SW_ABORTED; + list_cut_position(&bf_head, list, &lastbf->list); + ath_tx_process_buffer(sc, txq, &ts, bf, &bf_head); + } +} - /* remove ath_buf's of the same mpdu from txq */ - list_cut_position(&bf_head, &txq->axq_q, &lastbf->list); - txq->axq_depth--; +/* + * Drain a given TX queue (could be Beacon or Data) + * + * This assumes output has been stopped and + * we do not need to block ath_tx_tasklet. + */ +void ath_draintxq(struct ath_softc *sc, struct ath_txq *txq) +{ + ath_txq_lock(sc, txq); - spin_unlock_bh(&txq->axq_lock); + if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { + int idx = txq->txq_tailidx; - if (bf_isampdu(bf)) - ath_tx_complete_aggr(sc, txq, bf, &bf_head, 0); - else - ath_tx_complete_buf(sc, bf, txq, &bf_head, 0, 0); + while (!list_empty(&txq->txq_fifo[idx])) { + ath_drain_txq_list(sc, txq, &txq->txq_fifo[idx]); + + INCR(idx, ATH_TXFIFO_DEPTH); + } + txq->txq_tailidx = idx; } - spin_lock_bh(&txq->axq_lock); + txq->axq_link = NULL; txq->axq_tx_inprogress = false; - spin_unlock_bh(&txq->axq_lock); + ath_drain_txq_list(sc, txq, &txq->axq_q); - /* flush any pending frames if aggregation is enabled */ - if (sc->sc_flags & SC_OP_TXAGGR) { - if (!retry_tx) { - spin_lock_bh(&txq->axq_lock); - ath_txq_drain_pending_buffers(sc, txq); - spin_unlock_bh(&txq->axq_lock); - } - } + ath_txq_unlock_complete(sc, txq); } -void ath_drain_all_txq(struct ath_softc *sc, bool retry_tx) +bool ath_drain_all_txq(struct ath_softc *sc) { struct ath_hw *ah = sc->sc_ah; + struct ath_common *common = ath9k_hw_common(sc->sc_ah); struct ath_txq *txq; - int i, npend = 0; + int i; + u32 npend = 0; - if (sc->sc_flags & SC_OP_INVALID) - return; + if (test_bit(ATH_OP_INVALID, &common->op_flags)) + return true; - /* Stop beacon queue */ - ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq); + ath9k_hw_abort_tx_dma(ah); - /* Stop data queues */ + /* Check if any queue remains active */ for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { - if (ATH_TXQ_SETUP(sc, i)) { - txq = &sc->tx.txq[i]; - ath9k_hw_stoptxdma(ah, txq->axq_qnum); - npend += ath9k_hw_numtxpending(ah, txq->axq_qnum); - } - } - - if (npend) { - int r; + if (!ATH_TXQ_SETUP(sc, i)) + continue; - DPRINTF(sc, ATH_DBG_XMIT, "Unable to stop TxDMA. Reset HAL!\n"); + if (!sc->tx.txq[i].axq_depth) + continue; - spin_lock_bh(&sc->sc_resetlock); - r = ath9k_hw_reset(ah, sc->sc_ah->curchan, true); - if (r) - DPRINTF(sc, ATH_DBG_FATAL, - "Unable to reset hardware; reset status %d\n", - r); - spin_unlock_bh(&sc->sc_resetlock); + if (ath9k_hw_numtxpending(ah, sc->tx.txq[i].axq_qnum)) + npend |= BIT(i); } + if (npend) + ath_err(common, "Failed to stop TX DMA, queues=0x%03x!\n", npend); + for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { - if (ATH_TXQ_SETUP(sc, i)) - ath_draintxq(sc, &sc->tx.txq[i], retry_tx); + 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); } + + return !npend; } void ath_tx_cleanupq(struct ath_softc *sc, struct ath_txq *txq) @@ -1099,65 +1813,71 @@ void ath_tx_cleanupq(struct ath_softc *sc, struct ath_txq *txq) sc->tx.txqsetup &= ~(1<<txq->axq_qnum); } +/* For each axq_acq entry, for each tid, try to schedule packets + * for transmit until ampdu_depth has reached min Q depth. + */ void ath_txq_schedule(struct ath_softc *sc, struct ath_txq *txq) { - struct ath_atx_ac *ac; - struct ath_atx_tid *tid; + struct ath_common *common = ath9k_hw_common(sc->sc_ah); + struct ath_atx_ac *ac, *last_ac; + struct ath_atx_tid *tid, *last_tid; + bool sent = false; - if (list_empty(&txq->axq_acq)) + if (test_bit(ATH_OP_HW_RESET, &common->op_flags) || + list_empty(&txq->axq_acq)) return; - ac = list_first_entry(&txq->axq_acq, struct ath_atx_ac, list); - list_del(&ac->list); - ac->sched = false; + rcu_read_lock(); - do { - if (list_empty(&ac->tid_q)) - return; + last_ac = list_entry(txq->axq_acq.prev, struct ath_atx_ac, list); + while (!list_empty(&txq->axq_acq)) { + bool stop = false; - tid = list_first_entry(&ac->tid_q, struct ath_atx_tid, list); - list_del(&tid->list); - tid->sched = false; + ac = list_first_entry(&txq->axq_acq, 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; - if (tid->paused) - continue; + while (!list_empty(&ac->tid_q)) { - ath_tx_sched_aggr(sc, txq, tid); + tid = list_first_entry(&ac->tid_q, struct ath_atx_tid, + list); + list_del(&tid->list); + tid->sched = false; - /* - * add tid to round-robin queue if more frames - * are pending for the tid - */ - if (!list_empty(&tid->buf_q)) - ath_tx_queue_tid(txq, tid); + 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(txq, tid); - break; - } while (!list_empty(&ac->tid_q)); + if (stop || tid == last_tid) + break; + } - if (!list_empty(&ac->tid_q)) { - if (!ac->sched) { + if (!list_empty(&ac->tid_q) && !ac->sched) { ac->sched = true; list_add_tail(&ac->list, &txq->axq_acq); } - } -} -int ath_tx_setup(struct ath_softc *sc, int haltype) -{ - struct ath_txq *txq; + if (stop) + break; - if (haltype >= ARRAY_SIZE(sc->tx.hwq_map)) { - DPRINTF(sc, ATH_DBG_FATAL, - "HAL AC %u out of range, max %zu!\n", - haltype, ARRAY_SIZE(sc->tx.hwq_map)); - return 0; + if (ac == last_ac) { + if (!sent) + break; + + sent = false; + last_ac = list_entry(txq->axq_acq.prev, + struct ath_atx_ac, list); + } } - txq = ath_txq_setup(sc, ATH9K_TX_QUEUE_DATA, haltype); - if (txq != NULL) { - sc->tx.hwq_map[haltype] = txq->axq_qnum; - return 1; - } else - return 0; + + rcu_read_unlock(); } /***********/ @@ -1169,10 +1889,13 @@ int ath_tx_setup(struct ath_softc *sc, int haltype) * assume the descriptors are already chained together by caller. */ static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq, - struct list_head *head) + struct list_head *head, bool internal) { struct ath_hw *ah = sc->sc_ah; - struct ath_buf *bf; + struct ath_common *common = ath9k_hw_common(ah); + struct ath_buf *bf, *bf_last; + bool puttxbuf = false; + bool edma; /* * Insert the frame on the outbound list and @@ -1182,580 +1905,404 @@ static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq, if (list_empty(head)) return; + edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA); bf = list_first_entry(head, struct ath_buf, list); + bf_last = list_entry(head->prev, struct ath_buf, list); - list_splice_tail_init(head, &txq->axq_q); - txq->axq_depth++; - txq->axq_linkbuf = list_entry(txq->axq_q.prev, struct ath_buf, list); + ath_dbg(common, QUEUE, "qnum: %d, txq depth: %d\n", + txq->axq_qnum, txq->axq_depth); - DPRINTF(sc, ATH_DBG_QUEUE, - "qnum: %d, txq depth: %d\n", txq->axq_qnum, txq->axq_depth); - - if (txq->axq_link == NULL) { - ath9k_hw_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); - DPRINTF(sc, ATH_DBG_XMIT, - "TXDP[%u] = %llx (%p)\n", - txq->axq_qnum, ito64(bf->bf_daddr), bf->bf_desc); + if (edma && list_empty(&txq->txq_fifo[txq->txq_headidx])) { + list_splice_tail_init(head, &txq->txq_fifo[txq->txq_headidx]); + INCR(txq->txq_headidx, ATH_TXFIFO_DEPTH); + puttxbuf = true; } else { - *txq->axq_link = bf->bf_daddr; - DPRINTF(sc, ATH_DBG_XMIT, "link[%u] (%p)=%llx (%p)\n", - txq->axq_qnum, txq->axq_link, - ito64(bf->bf_daddr), bf->bf_desc); - } - txq->axq_link = &(bf->bf_lastbf->bf_desc->ds_link); - ath9k_hw_txstart(ah, txq->axq_qnum); -} + list_splice_tail_init(head, &txq->axq_q); -static struct ath_buf *ath_tx_get_buffer(struct ath_softc *sc) -{ - struct ath_buf *bf = NULL; - - spin_lock_bh(&sc->tx.txbuflock); + if (txq->axq_link) { + ath9k_hw_set_desc_link(ah, txq->axq_link, bf->bf_daddr); + ath_dbg(common, XMIT, "link[%u] (%p)=%llx (%p)\n", + txq->axq_qnum, txq->axq_link, + ito64(bf->bf_daddr), bf->bf_desc); + } else if (!edma) + puttxbuf = true; - if (unlikely(list_empty(&sc->tx.txbuf))) { - spin_unlock_bh(&sc->tx.txbuflock); - return NULL; + txq->axq_link = bf_last->bf_desc; } - bf = list_first_entry(&sc->tx.txbuf, struct ath_buf, list); - list_del(&bf->list); - - spin_unlock_bh(&sc->tx.txbuflock); - - return bf; -} - -static void ath_tx_send_ampdu(struct ath_softc *sc, struct ath_atx_tid *tid, - struct list_head *bf_head, - struct ath_tx_control *txctl) -{ - struct ath_buf *bf; - - 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); + if (puttxbuf) { + TX_STAT_INC(txq->axq_qnum, puttxbuf); + ath9k_hw_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); + ath_dbg(common, XMIT, "TXDP[%u] = %llx (%p)\n", + txq->axq_qnum, ito64(bf->bf_daddr), bf->bf_desc); + } - /* - * Do not queue to h/w when any of the following conditions is true: - * - there are pending frames in software queue - * - the TID is currently paused for ADDBA/BAR request - * - seqno is not within block-ack window - * - h/w queue depth exceeds low water mark - */ - if (!list_empty(&tid->buf_q) || tid->paused || - !BAW_WITHIN(tid->seq_start, tid->baw_size, bf->bf_seqno) || - txctl->txq->axq_depth >= ATH_AGGR_MIN_QDEPTH) { - /* - * Add this frame to software queue for scheduling later - * for aggregation. - */ - list_move_tail(&bf->list, &tid->buf_q); - ath_tx_queue_tid(txctl->txq, tid); - return; + if (!edma || sc->tx99_state) { + TX_STAT_INC(txq->axq_qnum, txstart); + ath9k_hw_txstart(ah, txq->axq_qnum); } - /* Add sub-frame to BAW */ - ath_tx_addto_baw(sc, tid, bf); + if (!internal) { + while (bf) { + txq->axq_depth++; + if (bf_is_ampdu_not_probing(bf)) + txq->axq_ampdu_depth++; - /* Queue to h/w without aggregation */ - bf->bf_nframes = 1; - bf->bf_lastbf = bf; - ath_buf_set_rate(sc, bf); - ath_tx_txqaddbuf(sc, txctl->txq, bf_head); + bf_last = bf->bf_lastbf; + bf = bf_last->bf_next; + bf_last->bf_next = NULL; + } + } } -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_send_normal(struct ath_softc *sc, struct ath_txq *txq, + struct ath_atx_tid *tid, struct sk_buff *skb) { - struct ath_buf *bf; - - bf = list_first_entry(bf_head, struct ath_buf, list); - bf->bf_state.bf_type &= ~BUF_AMPDU; + struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); + struct ath_frame_info *fi = get_frame_info(skb); + struct list_head bf_head; + struct ath_buf *bf = fi->bf; - /* update starting sequence number for subsequent ADDBA request */ - INCR(tid->seq_start, IEEE80211_SEQ_MAX); + INIT_LIST_HEAD(&bf_head); + list_add_tail(&bf->list, &bf_head); + bf->bf_state.bf_type = 0; + if (tid && (tx_info->flags & IEEE80211_TX_CTL_AMPDU)) { + bf->bf_state.bf_type = BUF_AMPDU; + ath_tx_addto_baw(sc, tid, bf); + } - bf->bf_nframes = 1; + bf->bf_next = NULL; bf->bf_lastbf = bf; - ath_buf_set_rate(sc, bf); - ath_tx_txqaddbuf(sc, txq, bf_head); + ath_tx_fill_desc(sc, bf, txq, fi->framelen); + ath_tx_txqaddbuf(sc, txq, &bf_head, false); TX_STAT_INC(txq->axq_qnum, queued); } -static void ath_tx_send_normal(struct ath_softc *sc, struct ath_txq *txq, - struct list_head *bf_head) +static void setup_frame_info(struct ieee80211_hw *hw, + struct ieee80211_sta *sta, + struct sk_buff *skb, + int framelen) { - struct ath_buf *bf; - - bf = list_first_entry(bf_head, struct ath_buf, list); + struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); + struct ieee80211_key_conf *hw_key = tx_info->control.hw_key; + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; + const struct ieee80211_rate *rate; + struct ath_frame_info *fi = get_frame_info(skb); + struct ath_node *an = NULL; + enum ath9k_key_type keytype; + bool short_preamble = false; - bf->bf_lastbf = bf; - bf->bf_nframes = 1; - ath_buf_set_rate(sc, bf); - ath_tx_txqaddbuf(sc, txq, bf_head); - TX_STAT_INC(txq->axq_qnum, queued); -} + /* + * We check if Short Preamble is needed for the CTS rate by + * checking the BSS's global flag. + * But for the rate series, IEEE80211_TX_RC_USE_SHORT_PREAMBLE is used. + */ + if (tx_info->control.vif && + tx_info->control.vif->bss_conf.use_short_preamble) + short_preamble = true; -static enum ath9k_pkt_type get_hw_packet_type(struct sk_buff *skb) -{ - struct ieee80211_hdr *hdr; - enum ath9k_pkt_type htype; - __le16 fc; + rate = ieee80211_get_rts_cts_rate(hw, tx_info); + keytype = ath9k_cmn_get_hw_crypto_keytype(skb); - hdr = (struct ieee80211_hdr *)skb->data; - fc = hdr->frame_control; + if (sta) + an = (struct ath_node *) sta->drv_priv; - if (ieee80211_is_beacon(fc)) - htype = ATH9K_PKT_TYPE_BEACON; - else if (ieee80211_is_probe_resp(fc)) - htype = ATH9K_PKT_TYPE_PROBE_RESP; - else if (ieee80211_is_atim(fc)) - htype = ATH9K_PKT_TYPE_ATIM; - else if (ieee80211_is_pspoll(fc)) - htype = ATH9K_PKT_TYPE_PSPOLL; + memset(fi, 0, sizeof(*fi)); + if (hw_key) + fi->keyix = hw_key->hw_key_idx; + else if (an && ieee80211_is_data(hdr->frame_control) && an->ps_key > 0) + fi->keyix = an->ps_key; else - htype = ATH9K_PKT_TYPE_NORMAL; + fi->keyix = ATH9K_TXKEYIX_INVALID; + fi->keytype = keytype; + fi->framelen = framelen; - return htype; + if (!rate) + return; + fi->rtscts_rate = rate->hw_value; + if (short_preamble) + fi->rtscts_rate |= rate->hw_value_short; } -static bool is_pae(struct sk_buff *skb) +u8 ath_txchainmask_reduction(struct ath_softc *sc, u8 chainmask, u32 rate) { - struct ieee80211_hdr *hdr; - __le16 fc; - - hdr = (struct ieee80211_hdr *)skb->data; - fc = hdr->frame_control; - - if (ieee80211_is_data(fc)) { - if (ieee80211_is_nullfunc(fc) || - /* Port Access Entity (IEEE 802.1X) */ - (skb->protocol == cpu_to_be16(ETH_P_PAE))) { - return true; - } - } - - return false; + struct ath_hw *ah = sc->sc_ah; + struct ath9k_channel *curchan = ah->curchan; + + if ((ah->caps.hw_caps & ATH9K_HW_CAP_APM) && IS_CHAN_5GHZ(curchan) && + (chainmask == 0x7) && (rate < 0x90)) + return 0x3; + else if (AR_SREV_9462(ah) && ath9k_hw_btcoex_is_enabled(ah) && + IS_CCK_RATE(rate)) + return 0x2; + else + return chainmask; } -static int get_hw_crypto_keytype(struct sk_buff *skb) +/* + * Assign a descriptor (and sequence number if necessary, + * and map buffer for DMA. Frees skb on error + */ +static struct ath_buf *ath_tx_setup_buffer(struct ath_softc *sc, + struct ath_txq *txq, + struct ath_atx_tid *tid, + struct sk_buff *skb) { - struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); + struct ath_common *common = ath9k_hw_common(sc->sc_ah); + struct ath_frame_info *fi = get_frame_info(skb); + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; + struct ath_buf *bf; + int fragno; + u16 seqno; - if (tx_info->control.hw_key) { - if (tx_info->control.hw_key->alg == ALG_WEP) - return ATH9K_KEY_TYPE_WEP; - else if (tx_info->control.hw_key->alg == ALG_TKIP) - return ATH9K_KEY_TYPE_TKIP; - else if (tx_info->control.hw_key->alg == ALG_CCMP) - return ATH9K_KEY_TYPE_AES; + bf = ath_tx_get_buffer(sc); + if (!bf) { + ath_dbg(common, XMIT, "TX buffers are full\n"); + return NULL; } - return ATH9K_KEY_TYPE_CLEAR; -} + ATH_TXBUF_RESET(bf); -static void assign_aggr_tid_seqno(struct sk_buff *skb, - struct ath_buf *bf) -{ - struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); - struct ieee80211_hdr *hdr; - struct ath_node *an; - struct ath_atx_tid *tid; - __le16 fc; - u8 *qc; + if (tid && ieee80211_is_data_present(hdr->frame_control)) { + fragno = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG; + seqno = tid->seq_next; + hdr->seq_ctrl = cpu_to_le16(tid->seq_next << IEEE80211_SEQ_SEQ_SHIFT); - if (!tx_info->control.sta) - return; + if (fragno) + hdr->seq_ctrl |= cpu_to_le16(fragno); - an = (struct ath_node *)tx_info->control.sta->drv_priv; - hdr = (struct ieee80211_hdr *)skb->data; - fc = hdr->frame_control; + if (!ieee80211_has_morefrags(hdr->frame_control)) + INCR(tid->seq_next, IEEE80211_SEQ_MAX); - if (ieee80211_is_data_qos(fc)) { - qc = ieee80211_get_qos_ctl(hdr); - bf->bf_tidno = qc[0] & 0xf; + bf->bf_state.seqno = seqno; } - /* - * For HT capable stations, we save tidno for later use. - * We also override seqno set by upper layer with the one - * in tx aggregation state. - * - * If fragmentation is on, the sequence number is - * not overridden, since it has been - * incremented by the fragmentation routine. - * - * FIXME: check if the fragmentation threshold exceeds - * IEEE80211 max. - */ - tid = ATH_AN_2_TID(an, bf->bf_tidno); - hdr->seq_ctrl = cpu_to_le16(tid->seq_next << - IEEE80211_SEQ_SEQ_SHIFT); - bf->bf_seqno = tid->seq_next; - INCR(tid->seq_next, IEEE80211_SEQ_MAX); -} - -static int setup_tx_flags(struct ath_softc *sc, struct sk_buff *skb, - struct ath_txq *txq) -{ - struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); - int flags = 0; - - flags |= ATH9K_TXDESC_CLRDMASK; /* needed for crypto errors */ - flags |= ATH9K_TXDESC_INTREQ; - - if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK) - flags |= ATH9K_TXDESC_NOACK; - - return flags; -} - -/* - * rix - rate index - * pktlen - total bytes (delims + data + fcs + pads + pad delims) - * width - 0 for 20 MHz, 1 for 40 MHz - * half_gi - to use 4us v/s 3.6 us for symbol time - */ -static u32 ath_pkt_duration(struct ath_softc *sc, u8 rix, struct ath_buf *bf, - int width, int half_gi, bool shortPreamble) -{ - const struct ath_rate_table *rate_table = sc->cur_rate_table; - u32 nbits, nsymbits, duration, nsymbols; - u8 rc; - int streams, pktlen; - - pktlen = bf_isaggr(bf) ? bf->bf_al : bf->bf_frmlen; - rc = rate_table->info[rix].ratecode; - - /* for legacy rates, use old function to compute packet duration */ - if (!IS_HT_RATE(rc)) - return ath9k_hw_computetxtime(sc->sc_ah, rate_table, pktlen, - rix, shortPreamble); - - /* find number of symbols: PLCP + data */ - nbits = (pktlen << 3) + OFDM_PLCP_BITS; - nsymbits = bits_per_symbol[HT_RC_2_MCS(rc)][width]; - nsymbols = (nbits + nsymbits - 1) / nsymbits; + bf->bf_mpdu = skb; - if (!half_gi) - duration = SYMBOL_TIME(nsymbols); - else - duration = SYMBOL_TIME_HALFGI(nsymbols); + bf->bf_buf_addr = dma_map_single(sc->dev, skb->data, + skb->len, DMA_TO_DEVICE); + if (unlikely(dma_mapping_error(sc->dev, bf->bf_buf_addr))) { + bf->bf_mpdu = NULL; + bf->bf_buf_addr = 0; + ath_err(ath9k_hw_common(sc->sc_ah), + "dma_mapping_error() on TX\n"); + ath_tx_return_buffer(sc, bf); + return NULL; + } - /* addup duration for legacy/ht training and signal fields */ - streams = HT_RC_2_STREAMS(rc); - duration += L_STF + L_LTF + L_SIG + HT_SIG + HT_STF + HT_LTF(streams); + fi->bf = bf; - return duration; + return bf; } -static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf) +static int ath_tx_prepare(struct ieee80211_hw *hw, struct sk_buff *skb, + struct ath_tx_control *txctl) { - const struct ath_rate_table *rt = sc->cur_rate_table; - struct ath9k_11n_rate_series series[4]; - struct sk_buff *skb; - struct ieee80211_tx_info *tx_info; - struct ieee80211_tx_rate *rates; - struct ieee80211_hdr *hdr; - int i, flags = 0; - u8 rix = 0, ctsrate = 0; - bool is_pspoll; - - memset(series, 0, sizeof(struct ath9k_11n_rate_series) * 4); + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; + struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); + struct ieee80211_sta *sta = txctl->sta; + struct ieee80211_vif *vif = info->control.vif; + struct ath_vif *avp; + struct ath_softc *sc = hw->priv; + int frmlen = skb->len + FCS_LEN; + int padpos, padsize; - skb = bf->bf_mpdu; - tx_info = IEEE80211_SKB_CB(skb); - rates = tx_info->control.rates; - hdr = (struct ieee80211_hdr *)skb->data; - is_pspoll = ieee80211_is_pspoll(hdr->frame_control); + /* NOTE: sta can be NULL according to net/mac80211.h */ + if (sta) + txctl->an = (struct ath_node *)sta->drv_priv; + else if (vif && ieee80211_is_data(hdr->frame_control)) { + avp = (void *)vif->drv_priv; + txctl->an = &avp->mcast_node; + } - /* - * We check if Short Preamble is needed for the CTS rate by - * checking the BSS's global flag. - * But for the rate series, IEEE80211_TX_RC_USE_SHORT_PREAMBLE is used. - */ - if (sc->sc_flags & SC_OP_PREAMBLE_SHORT) - ctsrate = rt->info[tx_info->control.rts_cts_rate_idx].ratecode | - rt->info[tx_info->control.rts_cts_rate_idx].short_preamble; - else - ctsrate = rt->info[tx_info->control.rts_cts_rate_idx].ratecode; + if (info->control.hw_key) + frmlen += info->control.hw_key->icv_len; /* - * ATH9K_TXDESC_RTSENA and ATH9K_TXDESC_CTSENA are mutually exclusive. - * Check the first rate in the series to decide whether RTS/CTS - * or CTS-to-self has to be used. + * As a temporary workaround, assign seq# here; this will likely need + * to be cleaned up to work better with Beacon transmission and virtual + * BSSes. */ - if (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) - flags = ATH9K_TXDESC_CTSENA; - else if (rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) - flags = ATH9K_TXDESC_RTSENA; - - /* FIXME: Handle aggregation protection */ - if (sc->config.ath_aggr_prot && - (!bf_isaggr(bf) || (bf_isaggr(bf) && bf->bf_al < 8192))) { - flags = ATH9K_TXDESC_RTSENA; + if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) { + if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT) + sc->tx.seq_no += 0x10; + hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); + hdr->seq_ctrl |= cpu_to_le16(sc->tx.seq_no); } - /* For AR5416 - RTS cannot be followed by a frame larger than 8K */ - if (bf_isaggr(bf) && (bf->bf_al > sc->sc_ah->caps.rts_aggr_limit)) - flags &= ~(ATH9K_TXDESC_RTSENA); + if ((vif && vif->type != NL80211_IFTYPE_AP && + vif->type != NL80211_IFTYPE_AP_VLAN) || + !ieee80211_is_data(hdr->frame_control)) + info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; - for (i = 0; i < 4; i++) { - if (!rates[i].count || (rates[i].idx < 0)) - continue; - - rix = rates[i].idx; - series[i].Tries = rates[i].count; - series[i].ChSel = sc->tx_chainmask; - - if (rates[i].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) - series[i].Rate = rt->info[rix].ratecode | - rt->info[rix].short_preamble; - else - series[i].Rate = rt->info[rix].ratecode; - - if (rates[i].flags & IEEE80211_TX_RC_USE_RTS_CTS) - series[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS; - if (rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) - series[i].RateFlags |= ATH9K_RATESERIES_2040; - if (rates[i].flags & IEEE80211_TX_RC_SHORT_GI) - series[i].RateFlags |= ATH9K_RATESERIES_HALFGI; + /* Add the padding after the header if this is not already done */ + padpos = ieee80211_hdrlen(hdr->frame_control); + padsize = padpos & 3; + if (padsize && skb->len > padpos) { + if (skb_headroom(skb) < padsize) + return -ENOMEM; - series[i].PktDuration = ath_pkt_duration(sc, rix, bf, - (rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) != 0, - (rates[i].flags & IEEE80211_TX_RC_SHORT_GI), - (rates[i].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)); + skb_push(skb, padsize); + memmove(skb->data, skb->data + padsize, padpos); } - /* set dur_update_en for l-sig computation except for PS-Poll frames */ - ath9k_hw_set11n_ratescenario(sc->sc_ah, bf->bf_desc, - bf->bf_lastbf->bf_desc, - !is_pspoll, ctsrate, - 0, series, 4, flags); - - if (sc->config.ath_aggr_prot && flags) - ath9k_hw_set11n_burstduration(sc->sc_ah, bf->bf_desc, 8192); + setup_frame_info(hw, sta, skb, frmlen); + return 0; } -static int ath_tx_setup_buffer(struct ieee80211_hw *hw, struct ath_buf *bf, - struct sk_buff *skb, - struct ath_tx_control *txctl) -{ - struct ath_wiphy *aphy = hw->priv; - struct ath_softc *sc = aphy->sc; - struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); - struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; - struct ath_tx_info_priv *tx_info_priv; - int hdrlen; - __le16 fc; - - tx_info_priv = kzalloc(sizeof(*tx_info_priv), GFP_ATOMIC); - if (unlikely(!tx_info_priv)) - return -ENOMEM; - tx_info->rate_driver_data[0] = tx_info_priv; - tx_info_priv->aphy = aphy; - tx_info_priv->frame_type = txctl->frame_type; - hdrlen = ieee80211_get_hdrlen_from_skb(skb); - fc = hdr->frame_control; - - ATH_TXBUF_RESET(bf); - bf->bf_frmlen = skb->len + FCS_LEN - (hdrlen & 3); - - if (conf_is_ht(&sc->hw->conf) && !is_pae(skb)) - bf->bf_state.bf_type |= BUF_HT; - - bf->bf_flags = setup_tx_flags(sc, skb, txctl->txq); +/* Upon failure caller should free skb */ +int ath_tx_start(struct ieee80211_hw *hw, struct sk_buff *skb, + struct ath_tx_control *txctl) +{ + struct ieee80211_hdr *hdr; + struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); + struct ieee80211_sta *sta = txctl->sta; + 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 q; + int ret; - bf->bf_keytype = get_hw_crypto_keytype(skb); - if (bf->bf_keytype != ATH9K_KEY_TYPE_CLEAR) { - bf->bf_frmlen += tx_info->control.hw_key->icv_len; - bf->bf_keyix = tx_info->control.hw_key->hw_key_idx; - } else { - bf->bf_keyix = ATH9K_TXKEYIX_INVALID; - } + ret = ath_tx_prepare(hw, skb, txctl); + if (ret) + return ret; - if (ieee80211_is_data_qos(fc) && (sc->sc_flags & SC_OP_TXAGGR)) - assign_aggr_tid_seqno(skb, bf); + hdr = (struct ieee80211_hdr *) skb->data; + /* + * 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. + */ - bf->bf_mpdu = skb; + q = skb_get_queue_mapping(skb); - bf->bf_dmacontext = dma_map_single(sc->dev, skb->data, - skb->len, DMA_TO_DEVICE); - if (unlikely(dma_mapping_error(sc->dev, bf->bf_dmacontext))) { - bf->bf_mpdu = NULL; - kfree(tx_info_priv); - tx_info->rate_driver_data[0] = NULL; - DPRINTF(sc, ATH_DBG_FATAL, "dma_mapping_error() on TX\n"); - return -ENOMEM; + ath_txq_lock(sc, txq); + if (txq == sc->tx.txq_map[q] && + ++txq->pending_frames > sc->tx.txq_max_pending[q] && + !txq->stopped) { + ieee80211_stop_queue(sc->hw, q); + txq->stopped = true; } - bf->bf_buf_addr = bf->bf_dmacontext; - return 0; -} - -/* FIXME: tx power */ -static void ath_tx_start_dma(struct ath_softc *sc, struct ath_buf *bf, - struct ath_tx_control *txctl) -{ - 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 ath_node *an = NULL; - struct list_head bf_head; - struct ath_desc *ds; - struct ath_atx_tid *tid; - struct ath_hw *ah = sc->sc_ah; - int frm_type; - __le16 fc; + if (txctl->an && ieee80211_is_data_present(hdr->frame_control)) + tid = ath_get_skb_tid(sc, txctl->an, skb); - frm_type = get_hw_packet_type(skb); - fc = hdr->frame_control; + if (info->flags & IEEE80211_TX_CTL_PS_RESPONSE) { + ath_txq_unlock(sc, txq); + txq = sc->tx.uapsdq; + ath_txq_lock(sc, txq); + } else if (txctl->an && + ieee80211_is_data_present(hdr->frame_control)) { + WARN_ON(tid->ac->txq != txctl->txq); - INIT_LIST_HEAD(&bf_head); - list_add_tail(&bf->list, &bf_head); + if (info->flags & IEEE80211_TX_CTL_CLEAR_PS_FILT) + tid->ac->clear_ps_filter = true; - ds = bf->bf_desc; - ds->ds_link = 0; - ds->ds_data = bf->bf_buf_addr; + /* + * 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(txq, tid); - ath9k_hw_set11n_txdesc(ah, ds, bf->bf_frmlen, frm_type, MAX_RATE_POWER, - bf->bf_keyix, bf->bf_keytype, bf->bf_flags); + ath_txq_schedule(sc, txq); + goto out; + } - ath9k_hw_filltxdesc(ah, ds, - skb->len, /* segment length */ - true, /* first segment */ - true, /* last segment */ - ds); /* first descriptor */ + bf = ath_tx_setup_buffer(sc, txq, tid, skb); + if (!bf) { + ath_txq_skb_done(sc, txq, skb); + if (txctl->paprd) + dev_kfree_skb_any(skb); + else + ieee80211_free_txskb(sc->hw, skb); + goto out; + } - spin_lock_bh(&txctl->txq->axq_lock); + bf->bf_state.bfs_paprd = txctl->paprd; - if (bf_isht(bf) && (sc->sc_flags & SC_OP_TXAGGR) && - tx_info->control.sta) { - an = (struct ath_node *)tx_info->control.sta->drv_priv; - tid = ATH_AN_2_TID(an, bf->bf_tidno); + if (txctl->paprd) + bf->bf_state.bfs_paprd_timestamp = jiffies; - if (!ieee80211_is_data_qos(fc)) { - ath_tx_send_normal(sc, txctl->txq, &bf_head); - goto tx_done; - } + ath_set_rates(vif, sta, bf); + ath_tx_send_normal(sc, txq, tid, skb); - if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) { - /* - * Try aggregation if it's a unicast data frame - * and the destination is HT capable. - */ - ath_tx_send_ampdu(sc, tid, &bf_head, txctl); - } else { - /* - * Send this frame as regular when ADDBA - * exchange is neither complete nor pending. - */ - ath_tx_send_ht_normal(sc, txctl->txq, - tid, &bf_head); - } - } else { - ath_tx_send_normal(sc, txctl->txq, &bf_head); - } +out: + ath_txq_unlock(sc, txq); -tx_done: - spin_unlock_bh(&txctl->txq->axq_lock); + return 0; } -/* Upon failure caller should free skb */ -int ath_tx_start(struct ieee80211_hw *hw, struct sk_buff *skb, - struct ath_tx_control *txctl) +void ath_tx_cabq(struct ieee80211_hw *hw, struct ieee80211_vif *vif, + struct sk_buff *skb) { - struct ath_wiphy *aphy = hw->priv; - struct ath_softc *sc = aphy->sc; + struct ath_softc *sc = hw->priv; + struct ath_tx_control txctl = { + .txq = sc->beacon.cabq + }; + struct ath_tx_info info = {}; + struct ieee80211_hdr *hdr; + struct ath_buf *bf_tail = NULL; struct ath_buf *bf; - int r; - - bf = ath_tx_get_buffer(sc); - if (!bf) { - DPRINTF(sc, ATH_DBG_XMIT, "TX buffers are full\n"); - return -1; - } - - r = ath_tx_setup_buffer(hw, bf, skb, txctl); - if (unlikely(r)) { - struct ath_txq *txq = txctl->txq; + LIST_HEAD(bf_q); + int duration = 0; + int max_duration; - DPRINTF(sc, ATH_DBG_FATAL, "TX mem alloc failure\n"); + max_duration = + sc->cur_beacon_conf.beacon_interval * 1000 * + sc->cur_beacon_conf.dtim_period / ATH_BCBUF; - /* upon ath_tx_processq() this TX queue will be resumed, we - * guarantee this will happen by knowing beforehand that - * we will at least have to run TX completionon one buffer - * on the queue */ - spin_lock_bh(&txq->axq_lock); - if (sc->tx.txq[txq->axq_qnum].axq_depth > 1) { - ieee80211_stop_queue(sc->hw, - skb_get_queue_mapping(skb)); - txq->stopped = 1; - } - spin_unlock_bh(&txq->axq_lock); + do { + struct ath_frame_info *fi = get_frame_info(skb); - spin_lock_bh(&sc->tx.txbuflock); - list_add_tail(&bf->list, &sc->tx.txbuf); - spin_unlock_bh(&sc->tx.txbuflock); + if (ath_tx_prepare(hw, skb, &txctl)) + break; - return r; - } + bf = ath_tx_setup_buffer(sc, txctl.txq, NULL, skb); + if (!bf) + break; - ath_tx_start_dma(sc, bf, txctl); + bf->bf_lastbf = bf; + ath_set_rates(vif, NULL, bf); + ath_buf_set_rate(sc, bf, &info, fi->framelen, false); + duration += info.rates[0].PktDuration; + if (bf_tail) + bf_tail->bf_next = bf; - return 0; -} + list_add_tail(&bf->list, &bf_q); + bf_tail = bf; + skb = NULL; -void ath_tx_cabq(struct ieee80211_hw *hw, struct sk_buff *skb) -{ - struct ath_wiphy *aphy = hw->priv; - struct ath_softc *sc = aphy->sc; - int hdrlen, padsize; - struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); - struct ath_tx_control txctl; + if (duration > max_duration) + break; - memset(&txctl, 0, sizeof(struct ath_tx_control)); + skb = ieee80211_get_buffered_bc(hw, vif); + } while(skb); - /* - * As a temporary workaround, assign seq# here; this will likely need - * to be cleaned up to work better with Beacon transmission and virtual - * BSSes. - */ - if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) { - struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; - if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT) - sc->tx.seq_no += 0x10; - hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); - hdr->seq_ctrl |= cpu_to_le16(sc->tx.seq_no); - } + if (skb) + ieee80211_free_txskb(hw, skb); - /* Add the padding after the header if this is not already done */ - hdrlen = ieee80211_get_hdrlen_from_skb(skb); - if (hdrlen & 3) { - padsize = hdrlen % 4; - if (skb_headroom(skb) < padsize) { - DPRINTF(sc, ATH_DBG_XMIT, "TX CABQ padding failed\n"); - dev_kfree_skb_any(skb); - return; - } - skb_push(skb, padsize); - memmove(skb->data, skb->data + padsize, hdrlen); - } - - txctl.txq = sc->beacon.cabq; + if (list_empty(&bf_q)) + return; - DPRINTF(sc, ATH_DBG_XMIT, "transmitting CABQ packet, skb: %p\n", skb); + bf = list_first_entry(&bf_q, struct ath_buf, list); + hdr = (struct ieee80211_hdr *) bf->bf_mpdu->data; - if (ath_tx_start(hw, skb, &txctl) != 0) { - DPRINTF(sc, ATH_DBG_XMIT, "CABQ TX failed\n"); - goto exit; + if (hdr->frame_control & IEEE80211_FCTL_MOREDATA) { + hdr->frame_control &= ~IEEE80211_FCTL_MOREDATA; + dma_sync_single_for_device(sc->dev, bf->bf_buf_addr, + sizeof(*hdr), DMA_TO_DEVICE); } - return; -exit: - dev_kfree_skb_any(skb); + ath_txq_lock(sc, txctl.txq); + ath_tx_fill_desc(sc, bf, txctl.txq, 0); + ath_tx_txqaddbuf(sc, txctl.txq, &bf_q, false); + TX_STAT_INC(txctl.txq->axq_qnum, queued); + ath_txq_unlock(sc, txctl.txq); } /*****************/ @@ -1763,84 +2310,86 @@ exit: /*****************/ static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb, - int tx_flags) + int tx_flags, struct ath_txq *txq) { - struct ieee80211_hw *hw = sc->hw; struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); - struct ath_tx_info_priv *tx_info_priv = ATH_TX_INFO_PRIV(tx_info); - int hdrlen, padsize; - int frame_type = ATH9K_NOT_INTERNAL; - - DPRINTF(sc, ATH_DBG_XMIT, "TX complete: skb: %p\n", skb); - - if (tx_info_priv) { - hw = tx_info_priv->aphy->hw; - frame_type = tx_info_priv->frame_type; - } + struct ath_common *common = ath9k_hw_common(sc->sc_ah); + struct ieee80211_hdr * hdr = (struct ieee80211_hdr *)skb->data; + int padpos, padsize; + unsigned long flags; - if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK || - tx_info->flags & IEEE80211_TX_STAT_TX_FILTERED) { - kfree(tx_info_priv); - tx_info->rate_driver_data[0] = NULL; - } + ath_dbg(common, XMIT, "TX complete: skb: %p\n", skb); - if (tx_flags & ATH_TX_BAR) - tx_info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; + if (sc->sc_ah->caldata) + set_bit(PAPRD_PACKET_SENT, &sc->sc_ah->caldata->cal_flags); - if (!(tx_flags & (ATH_TX_ERROR | ATH_TX_XRETRY))) { + if (!(tx_flags & ATH_TX_ERROR)) /* Frame was ACKed */ tx_info->flags |= IEEE80211_TX_STAT_ACK; - } - hdrlen = ieee80211_get_hdrlen_from_skb(skb); - padsize = hdrlen & 3; - if (padsize && hdrlen >= 24) { + padpos = ieee80211_hdrlen(hdr->frame_control); + padsize = padpos & 3; + if (padsize && skb->len>padpos+padsize) { /* * Remove MAC header padding before giving the frame back to * mac80211. */ - memmove(skb->data + padsize, skb->data, hdrlen); + memmove(skb->data + padsize, skb->data, padpos); skb_pull(skb, padsize); } - if (sc->sc_flags & SC_OP_WAIT_FOR_TX_ACK) { - sc->sc_flags &= ~SC_OP_WAIT_FOR_TX_ACK; - DPRINTF(sc, ATH_DBG_PS, "Going back to sleep after having " - "received TX status (0x%x)\n", - sc->sc_flags & (SC_OP_WAIT_FOR_BEACON | - SC_OP_WAIT_FOR_CAB | - SC_OP_WAIT_FOR_PSPOLL_DATA | - SC_OP_WAIT_FOR_TX_ACK)); + spin_lock_irqsave(&sc->sc_pm_lock, flags); + if ((sc->ps_flags & PS_WAIT_FOR_TX_ACK) && !txq->axq_depth) { + sc->ps_flags &= ~PS_WAIT_FOR_TX_ACK; + ath_dbg(common, PS, + "Going back to sleep after having received TX status (0x%lx)\n", + sc->ps_flags & (PS_WAIT_FOR_BEACON | + PS_WAIT_FOR_CAB | + PS_WAIT_FOR_PSPOLL_DATA | + PS_WAIT_FOR_TX_ACK)); } + spin_unlock_irqrestore(&sc->sc_pm_lock, flags); - if (frame_type == ATH9K_NOT_INTERNAL) - ieee80211_tx_status(hw, skb); - else - ath9k_tx_status(hw, skb); + __skb_queue_tail(&txq->complete_q, skb); + ath_txq_skb_done(sc, txq, 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) + struct ath_txq *txq, struct list_head *bf_q, + struct ath_tx_status *ts, int txok) { struct sk_buff *skb = bf->bf_mpdu; + struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); unsigned long flags; int tx_flags = 0; - if (sendbar) - tx_flags = ATH_TX_BAR; - - if (!txok) { + if (!txok) tx_flags |= ATH_TX_ERROR; - if (bf_isxretried(bf)) - tx_flags |= ATH_TX_XRETRY; - } + if (ts->ts_status & ATH9K_TXERR_FILT) + tx_info->flags |= IEEE80211_TX_STAT_TX_FILTERED; + + dma_unmap_single(sc->dev, bf->bf_buf_addr, skb->len, DMA_TO_DEVICE); + bf->bf_buf_addr = 0; + if (sc->tx99_state) + goto skip_tx_complete; - 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); + if (bf->bf_state.bfs_paprd) { + if (time_after(jiffies, + bf->bf_state.bfs_paprd_timestamp + + msecs_to_jiffies(ATH_PAPRD_TIMEOUT))) + dev_kfree_skb_any(skb); + else + complete(&sc->paprd_complete); + } else { + ath_debug_stat_tx(sc, bf, ts, txq, tx_flags); + ath_tx_complete(sc, skb, tx_flags, txq); + } +skip_tx_complete: + /* At this point, skb (bf->bf_mpdu) is consumed...make sure we don't + * accidentally reference it later. + */ + bf->bf_mpdu = NULL; /* * Return the list of ath_buf of this mpdu to free queue @@ -1850,108 +2399,83 @@ static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf, spin_unlock_irqrestore(&sc->tx.txbuflock, flags); } -static int ath_tx_num_badfrms(struct ath_softc *sc, struct ath_buf *bf, - int txok) -{ - struct ath_buf *bf_last = bf->bf_lastbf; - struct ath_desc *ds = bf_last->bf_desc; - u16 seq_st = 0; - u32 ba[WME_BA_BMP_SIZE >> 5]; - int ba_index; - int nbad = 0; - int isaggr = 0; - - if (ds->ds_txstat.ts_flags == ATH9K_TX_SW_ABORTED) - return 0; - - isaggr = bf_isaggr(bf); - if (isaggr) { - seq_st = ATH_DS_BA_SEQ(ds); - memcpy(ba, ATH_DS_BA_BITMAP(ds), WME_BA_BMP_SIZE >> 3); - } - - while (bf) { - ba_index = ATH_BA_INDEX(seq_st, bf->bf_seqno); - if (!txok || (isaggr && !ATH_BA_ISSET(ba, ba_index))) - nbad++; - - bf = bf->bf_next; - } - - return nbad; -} - -static void ath_tx_rc_status(struct ath_buf *bf, struct ath_desc *ds, - int nbad, int txok, bool update_rc) +static void ath_tx_rc_status(struct ath_softc *sc, struct ath_buf *bf, + struct ath_tx_status *ts, int nframes, int nbad, + int txok) { struct sk_buff *skb = bf->bf_mpdu; struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); - struct ath_tx_info_priv *tx_info_priv = ATH_TX_INFO_PRIV(tx_info); - struct ieee80211_hw *hw = tx_info_priv->aphy->hw; + struct ieee80211_hw *hw = sc->hw; + struct ath_hw *ah = sc->sc_ah; u8 i, tx_rateindex; if (txok) - tx_info->status.ack_signal = ds->ds_txstat.ts_rssi; + tx_info->status.ack_signal = ts->ts_rssi; - tx_rateindex = ds->ds_txstat.ts_rateindex; + tx_rateindex = ts->ts_rateindex; WARN_ON(tx_rateindex >= hw->max_rates); - tx_info_priv->update_rc = update_rc; - if (ds->ds_txstat.ts_status & ATH9K_TXERR_FILT) - tx_info->flags |= IEEE80211_TX_STAT_TX_FILTERED; + if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) { + tx_info->flags |= IEEE80211_TX_STAT_AMPDU; - if ((ds->ds_txstat.ts_status & ATH9K_TXERR_FILT) == 0 && - (bf->bf_flags & ATH9K_TXDESC_NOACK) == 0 && update_rc) { - if (ieee80211_is_data(hdr->frame_control)) { - memcpy(&tx_info_priv->tx, &ds->ds_txstat, - sizeof(tx_info_priv->tx)); - tx_info_priv->n_frames = bf->bf_nframes; - tx_info_priv->n_bad_frames = nbad; - } + BUG_ON(nbad > nframes); } + tx_info->status.ampdu_len = nframes; + tx_info->status.ampdu_ack_len = nframes - nbad; - for (i = tx_rateindex + 1; i < hw->max_rates; i++) - tx_info->status.rates[i].count = 0; - - tx_info->status.rates[tx_rateindex].count = bf->bf_retries + 1; -} - -static void ath_wake_mac80211_queue(struct ath_softc *sc, struct ath_txq *txq) -{ - int qnum; + if ((ts->ts_status & ATH9K_TXERR_FILT) == 0 && + (tx_info->flags & IEEE80211_TX_CTL_NO_ACK) == 0) { + /* + * If an underrun error is seen assume it as an excessive + * retry only if max frame trigger level has been reached + * (2 KB for single stream, and 4 KB for dual stream). + * Adjust the long retry as if the frame was tried + * hw->max_rate_tries times to affect how rate control updates + * PER for the failed rate. + * In case of congestion on the bus penalizing this type of + * underruns should help hardware actually transmit new frames + * successfully by eventually preferring slower rates. + * This itself should also alleviate congestion on the bus. + */ + if (unlikely(ts->ts_flags & (ATH9K_TX_DATA_UNDERRUN | + ATH9K_TX_DELIM_UNDERRUN)) && + ieee80211_is_data(hdr->frame_control) && + ah->tx_trig_level >= sc->sc_ah->config.max_txtrig_level) + tx_info->status.rates[tx_rateindex].count = + hw->max_rate_tries; + } - spin_lock_bh(&txq->axq_lock); - if (txq->stopped && - sc->tx.txq[txq->axq_qnum].axq_depth <= (ATH_TXBUF - 20)) { - qnum = ath_get_mac80211_qnum(txq->axq_qnum, sc); - if (qnum != -1) { - ieee80211_wake_queue(sc->hw, qnum); - txq->stopped = 0; - } + for (i = tx_rateindex + 1; i < hw->max_rates; i++) { + tx_info->status.rates[i].count = 0; + tx_info->status.rates[i].idx = -1; } - spin_unlock_bh(&txq->axq_lock); + + tx_info->status.rates[tx_rateindex].count = ts->ts_longretry + 1; } static void ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq) { struct ath_hw *ah = sc->sc_ah; + struct ath_common *common = ath9k_hw_common(ah); struct ath_buf *bf, *lastbf, *bf_held = NULL; struct list_head bf_head; struct ath_desc *ds; - int txok; + struct ath_tx_status ts; int status; - DPRINTF(sc, ATH_DBG_QUEUE, "tx queue %d (%x), link %p\n", + ath_dbg(common, QUEUE, "tx queue %d (%x), link %p\n", txq->axq_qnum, ath9k_hw_gettxbuf(sc->sc_ah, txq->axq_qnum), txq->axq_link); + ath_txq_lock(sc, txq); for (;;) { - spin_lock_bh(&txq->axq_lock); + if (test_bit(ATH_OP_HW_RESET, &common->op_flags)) + break; + if (list_empty(&txq->axq_q)) { txq->axq_link = NULL; - txq->axq_linkbuf = NULL; - spin_unlock_bh(&txq->axq_lock); + ath_txq_schedule(sc, txq); break; } bf = list_first_entry(&txq->axq_q, struct ath_buf, list); @@ -1965,125 +2489,133 @@ static void ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq) * it with the STALE flag. */ bf_held = NULL; - if (bf->bf_stale) { + if (bf->bf_state.stale) { bf_held = bf; - if (list_is_last(&bf_held->list, &txq->axq_q)) { - spin_unlock_bh(&txq->axq_lock); + if (list_is_last(&bf_held->list, &txq->axq_q)) break; - } else { - bf = list_entry(bf_held->list.next, - struct ath_buf, list); - } + + bf = list_entry(bf_held->list.next, struct ath_buf, + list); } lastbf = bf->bf_lastbf; ds = lastbf->bf_desc; - status = ath9k_hw_txprocdesc(ah, ds); - if (status == -EINPROGRESS) { - spin_unlock_bh(&txq->axq_lock); + memset(&ts, 0, sizeof(ts)); + status = ath9k_hw_txprocdesc(ah, ds, &ts); + if (status == -EINPROGRESS) break; - } - if (bf->bf_desc == txq->axq_lastdsWithCTS) - txq->axq_lastdsWithCTS = NULL; - if (ds == txq->axq_gatingds) - txq->axq_gatingds = NULL; + + TX_STAT_INC(txq->axq_qnum, txprocdesc); /* * Remove ath_buf's of the same transmit unit from txq, * however leave the last descriptor back as the holding * descriptor for hw. */ - lastbf->bf_stale = true; + lastbf->bf_state.stale = true; INIT_LIST_HEAD(&bf_head); if (!list_is_singular(&lastbf->list)) list_cut_position(&bf_head, &txq->axq_q, lastbf->list.prev); - txq->axq_depth--; - if (bf_isaggr(bf)) - 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) { - spin_lock_bh(&sc->tx.txbuflock); - list_move_tail(&bf_held->list, &sc->tx.txbuf); - spin_unlock_bh(&sc->tx.txbuflock); + list_del(&bf_held->list); + ath_tx_return_buffer(sc, bf_held); } - if (!bf_isampdu(bf)) { - /* - * This frame is sent out as a single frame. - * Use hardware retry status for this frame. - */ - bf->bf_retries = ds->ds_txstat.ts_longretry; - if (ds->ds_txstat.ts_status & ATH9K_TXERR_XRETRY) - bf->bf_state.bf_type |= BUF_XRETRY; - ath_tx_rc_status(bf, ds, 0, txok, true); - } - - if (bf_isampdu(bf)) - ath_tx_complete_aggr(sc, txq, bf, &bf_head, txok); - else - ath_tx_complete_buf(sc, bf, txq, &bf_head, txok, 0); + ath_tx_process_buffer(sc, txq, &ts, bf, &bf_head); + } + ath_txq_unlock_complete(sc, txq); +} - ath_wake_mac80211_queue(sc, txq); +void ath_tx_tasklet(struct ath_softc *sc) +{ + struct ath_hw *ah = sc->sc_ah; + u32 qcumask = ((1 << ATH9K_NUM_TX_QUEUES) - 1) & ah->intr_txqs; + int i; - spin_lock_bh(&txq->axq_lock); - if (sc->sc_flags & SC_OP_TXAGGR) - ath_txq_schedule(sc, txq); - spin_unlock_bh(&txq->axq_lock); + for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { + if (ATH_TXQ_SETUP(sc, i) && (qcumask & (1 << i))) + ath_tx_processq(sc, &sc->tx.txq[i]); } } -static void ath_tx_complete_poll_work(struct work_struct *work) +void ath_tx_edma_tasklet(struct ath_softc *sc) { - struct ath_softc *sc = container_of(work, struct ath_softc, - tx_complete_work.work); + struct ath_tx_status ts; + struct ath_common *common = ath9k_hw_common(sc->sc_ah); + struct ath_hw *ah = sc->sc_ah; 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); + struct ath_buf *bf, *lastbf; + struct list_head bf_head; + struct list_head *fifo_list; + int status; + + for (;;) { + if (test_bit(ATH_OP_HW_RESET, &common->op_flags)) + break; + + status = ath9k_hw_txprocdesc(ah, NULL, (void *)&ts); + if (status == -EINPROGRESS) + break; + if (status == -EIO) { + ath_dbg(common, XMIT, "Error processing tx status\n"); + break; } - if (needreset) { - DPRINTF(sc, ATH_DBG_RESET, "tx hung, resetting the chip\n"); - ath_reset(sc, false); - } + /* Process beacon completions separately */ + if (ts.qid == sc->beacon.beaconq) { + sc->beacon.tx_processed = true; + sc->beacon.tx_last = !(ts.ts_status & ATH9K_TXERR_MASK); - ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, - msecs_to_jiffies(ATH_TX_COMPLETE_POLL_INT)); -} + ath9k_csa_update(sc); + continue; + } + txq = &sc->tx.txq[ts.qid]; + ath_txq_lock(sc, txq); -void ath_tx_tasklet(struct ath_softc *sc) -{ - int i; - u32 qcumask = ((1 << ATH9K_NUM_TX_QUEUES) - 1); + TX_STAT_INC(txq->axq_qnum, txprocdesc); - ath9k_hw_gettxintrtxqs(sc->sc_ah, &qcumask); + fifo_list = &txq->txq_fifo[txq->txq_tailidx]; + if (list_empty(fifo_list)) { + ath_txq_unlock(sc, txq); + return; + } - for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { - if (ATH_TXQ_SETUP(sc, i) && (qcumask & (1 << i))) - ath_tx_processq(sc, &sc->tx.txq[i]); + bf = list_first_entry(fifo_list, struct ath_buf, list); + if (bf->bf_state.stale) { + list_del(&bf->list); + ath_tx_return_buffer(sc, bf); + bf = list_first_entry(fifo_list, struct ath_buf, list); + } + + lastbf = bf->bf_lastbf; + + INIT_LIST_HEAD(&bf_head); + if (list_is_last(&lastbf->list, fifo_list)) { + list_splice_tail_init(fifo_list, &bf_head); + INCR(txq->txq_tailidx, ATH_TXFIFO_DEPTH); + + if (!list_empty(&txq->axq_q)) { + struct list_head bf_q; + + INIT_LIST_HEAD(&bf_q); + txq->axq_link = NULL; + list_splice_tail_init(&txq->axq_q, &bf_q); + ath_tx_txqaddbuf(sc, txq, &bf_q, true); + } + } else { + lastbf->bf_state.stale = true; + if (bf != lastbf) + list_cut_position(&bf_head, fifo_list, + lastbf->list.prev); + } + + ath_tx_process_buffer(sc, txq, &ts, bf, &bf_head); + ath_txq_unlock_complete(sc, txq); } } @@ -2091,46 +2623,64 @@ void ath_tx_tasklet(struct ath_softc *sc) /* Init, Cleanup */ /*****************/ +static int ath_txstatus_setup(struct ath_softc *sc, int size) +{ + struct ath_descdma *dd = &sc->txsdma; + u8 txs_len = sc->sc_ah->caps.txs_len; + + dd->dd_desc_len = size * txs_len; + dd->dd_desc = dmam_alloc_coherent(sc->dev, dd->dd_desc_len, + &dd->dd_desc_paddr, GFP_KERNEL); + if (!dd->dd_desc) + return -ENOMEM; + + return 0; +} + +static int ath_tx_edma_init(struct ath_softc *sc) +{ + int err; + + err = ath_txstatus_setup(sc, ATH_TXSTATUS_RING_SIZE); + if (!err) + ath9k_hw_setup_statusring(sc->sc_ah, sc->txsdma.dd_desc, + sc->txsdma.dd_desc_paddr, + ATH_TXSTATUS_RING_SIZE); + + return err; +} + int ath_tx_init(struct ath_softc *sc, int nbufs) { + struct ath_common *common = ath9k_hw_common(sc->sc_ah); int error = 0; spin_lock_init(&sc->tx.txbuflock); error = ath_descdma_setup(sc, &sc->tx.txdma, &sc->tx.txbuf, - "tx", nbufs, 1); + "tx", nbufs, 1, 1); if (error != 0) { - DPRINTF(sc, ATH_DBG_FATAL, + ath_err(common, "Failed to allocate tx descriptors: %d\n", error); - goto err; + return error; } error = ath_descdma_setup(sc, &sc->beacon.bdma, &sc->beacon.bbuf, - "beacon", ATH_BCBUF, 1); + "beacon", ATH_BCBUF, 1, 1); if (error != 0) { - DPRINTF(sc, ATH_DBG_FATAL, + ath_err(common, "Failed to allocate beacon descriptors: %d\n", error); - goto err; + return error; } INIT_DELAYED_WORK(&sc->tx_complete_work, ath_tx_complete_poll_work); -err: - if (error != 0) - ath_tx_cleanup(sc); + if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) + error = ath_tx_edma_init(sc); return error; } -void ath_tx_cleanup(struct ath_softc *sc) -{ - if (sc->beacon.bdma.dd_desc_len != 0) - ath_descdma_cleanup(sc, &sc->beacon.bdma, &sc->beacon.bbuf); - - if (sc->tx.txdma.dd_desc_len != 0) - ath_descdma_cleanup(sc, &sc->tx.txdma, &sc->tx.txbuf); -} - void ath_tx_node_init(struct ath_softc *sc, struct ath_node *an) { struct ath_atx_tid *tid; @@ -2138,7 +2688,7 @@ void ath_tx_node_init(struct ath_softc *sc, struct ath_node *an) int tidno, acno; for (tidno = 0, tid = &an->tid[tidno]; - tidno < WME_NUM_TID; + tidno < IEEE80211_NUM_TIDS; tidno++, tid++) { tid->an = an; tid->tidno = tidno; @@ -2146,74 +2696,97 @@ void ath_tx_node_init(struct ath_softc *sc, struct ath_node *an) tid->baw_size = WME_MAX_BA; tid->baw_head = tid->baw_tail = 0; tid->sched = false; - tid->paused = false; - tid->state &= ~AGGR_CLEANUP; - INIT_LIST_HEAD(&tid->buf_q); + tid->active = false; + __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]; - tid->state &= ~AGGR_ADDBA_COMPLETE; - tid->state &= ~AGGR_ADDBA_PROGRESS; } for (acno = 0, ac = &an->ac[acno]; - acno < WME_NUM_AC; acno++, ac++) { + 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); - - switch (acno) { - case WME_AC_BE: - ac->qnum = ath_tx_get_qnum(sc, - ATH9K_TX_QUEUE_DATA, ATH9K_WME_AC_BE); - break; - case WME_AC_BK: - ac->qnum = ath_tx_get_qnum(sc, - ATH9K_TX_QUEUE_DATA, ATH9K_WME_AC_BK); - break; - case WME_AC_VI: - ac->qnum = ath_tx_get_qnum(sc, - ATH9K_TX_QUEUE_DATA, ATH9K_WME_AC_VI); - break; - case WME_AC_VO: - ac->qnum = ath_tx_get_qnum(sc, - ATH9K_TX_QUEUE_DATA, ATH9K_WME_AC_VO); - break; - } } } void ath_tx_node_cleanup(struct ath_softc *sc, struct ath_node *an) { - int i; - struct ath_atx_ac *ac, *ac_tmp; - struct ath_atx_tid *tid, *tid_tmp; + struct ath_atx_ac *ac; + struct ath_atx_tid *tid; struct ath_txq *txq; + int tidno; - for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { - if (ATH_TXQ_SETUP(sc, i)) { - txq = &sc->tx.txq[i]; - - spin_lock(&txq->axq_lock); - - list_for_each_entry_safe(ac, - ac_tmp, &txq->axq_acq, list) { - tid = list_first_entry(&ac->tid_q, - struct ath_atx_tid, list); - if (tid && tid->an != an) - continue; - list_del(&ac->list); - ac->sched = false; - - list_for_each_entry_safe(tid, - tid_tmp, &ac->tid_q, list) { - list_del(&tid->list); - tid->sched = false; - ath_tid_drain(sc, txq, tid); - tid->state &= ~AGGR_ADDBA_COMPLETE; - tid->state &= ~AGGR_CLEANUP; - } - } + for (tidno = 0, tid = &an->tid[tidno]; + tidno < IEEE80211_NUM_TIDS; tidno++, tid++) { + + ac = tid->ac; + txq = ac->txq; + + ath_txq_lock(sc, txq); + + if (tid->sched) { + list_del(&tid->list); + tid->sched = false; + } + + if (ac->sched) { + list_del(&ac->list); + tid->ac->sched = false; + } + + ath_tid_drain(sc, txq, tid); + tid->active = false; + + ath_txq_unlock(sc, txq); + } +} + +#ifdef CONFIG_ATH9K_TX99 - spin_unlock(&txq->axq_lock); +int ath9k_tx99_send(struct ath_softc *sc, struct sk_buff *skb, + struct ath_tx_control *txctl) +{ + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; + struct ath_frame_info *fi = get_frame_info(skb); + struct ath_common *common = ath9k_hw_common(sc->sc_ah); + struct ath_buf *bf; + int padpos, padsize; + + padpos = ieee80211_hdrlen(hdr->frame_control); + padsize = padpos & 3; + + if (padsize && skb->len > padpos) { + if (skb_headroom(skb) < padsize) { + ath_dbg(common, XMIT, + "tx99 padding failed\n"); + return -EINVAL; } + + skb_push(skb, padsize); + memmove(skb->data, skb->data + padsize, padpos); } + + fi->keyix = ATH9K_TXKEYIX_INVALID; + fi->framelen = skb->len + FCS_LEN; + fi->keytype = ATH9K_KEY_TYPE_CLEAR; + + bf = ath_tx_setup_buffer(sc, txctl->txq, NULL, skb); + if (!bf) { + ath_dbg(common, XMIT, "tx99 buffer setup failed\n"); + return -EINVAL; + } + + ath_set_rates(sc->tx99_vif, NULL, bf); + + ath9k_hw_set_desc_link(sc->sc_ah, bf->bf_desc, bf->bf_daddr); + ath9k_hw_tx99_start(sc->sc_ah, txctl->txq->axq_qnum); + + ath_tx_send_normal(sc, txctl->txq, NULL, skb); + + return 0; } + +#endif /* CONFIG_ATH9K_TX99 */ |