2 * Copyright (c) 2008-2009 Atheros Communications Inc.
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 #include "ar9003_mac.h"
20 #define BITS_PER_BYTE 8
21 #define OFDM_PLCP_BITS 22
22 #define HT_RC_2_MCS(_rc) ((_rc) & 0x1f)
23 #define HT_RC_2_STREAMS(_rc) ((((_rc) & 0x78) >> 3) + 1)
29 #define HT_LTF(_ns) (4 * (_ns))
30 #define SYMBOL_TIME(_ns) ((_ns) << 2) /* ns * 4 us */
31 #define SYMBOL_TIME_HALFGI(_ns) (((_ns) * 18 + 4) / 5) /* ns * 3.6 us */
32 #define NUM_SYMBOLS_PER_USEC(_usec) (_usec >> 2)
33 #define NUM_SYMBOLS_PER_USEC_HALFGI(_usec) (((_usec*5)-4)/18)
35 #define OFDM_SIFS_TIME 16
37 static u16 bits_per_symbol[][2] = {
39 { 26, 54 }, /* 0: BPSK */
40 { 52, 108 }, /* 1: QPSK 1/2 */
41 { 78, 162 }, /* 2: QPSK 3/4 */
42 { 104, 216 }, /* 3: 16-QAM 1/2 */
43 { 156, 324 }, /* 4: 16-QAM 3/4 */
44 { 208, 432 }, /* 5: 64-QAM 2/3 */
45 { 234, 486 }, /* 6: 64-QAM 3/4 */
46 { 260, 540 }, /* 7: 64-QAM 5/6 */
49 #define IS_HT_RATE(_rate) ((_rate) & 0x80)
51 static void ath_tx_send_ht_normal(struct ath_softc *sc, struct ath_txq *txq,
52 struct ath_atx_tid *tid,
53 struct list_head *bf_head);
54 static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf,
55 struct ath_txq *txq, struct list_head *bf_q,
56 struct ath_tx_status *ts, int txok, int sendbar);
57 static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq,
58 struct list_head *head);
59 static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf);
60 static int ath_tx_num_badfrms(struct ath_softc *sc, struct ath_buf *bf,
61 struct ath_tx_status *ts, int txok);
62 static void ath_tx_rc_status(struct ath_buf *bf, struct ath_tx_status *ts,
63 int nbad, int txok, bool update_rc);
64 static void ath_tx_update_baw(struct ath_softc *sc, struct ath_atx_tid *tid,
74 static int ath_max_4ms_framelen[4][32] = {
76 3212, 6432, 9648, 12864, 19300, 25736, 28952, 32172,
77 6424, 12852, 19280, 25708, 38568, 51424, 57852, 64280,
78 9628, 19260, 28896, 38528, 57792, 65532, 65532, 65532,
79 12828, 25656, 38488, 51320, 65532, 65532, 65532, 65532,
82 3572, 7144, 10720, 14296, 21444, 28596, 32172, 35744,
83 7140, 14284, 21428, 28568, 42856, 57144, 64288, 65532,
84 10700, 21408, 32112, 42816, 64228, 65532, 65532, 65532,
85 14256, 28516, 42780, 57040, 65532, 65532, 65532, 65532,
88 6680, 13360, 20044, 26724, 40092, 53456, 60140, 65532,
89 13348, 26700, 40052, 53400, 65532, 65532, 65532, 65532,
90 20004, 40008, 60016, 65532, 65532, 65532, 65532, 65532,
91 26644, 53292, 65532, 65532, 65532, 65532, 65532, 65532,
94 7420, 14844, 22272, 29696, 44544, 59396, 65532, 65532,
95 14832, 29668, 44504, 59340, 65532, 65532, 65532, 65532,
96 22232, 44464, 65532, 65532, 65532, 65532, 65532, 65532,
97 29616, 59232, 65532, 65532, 65532, 65532, 65532, 65532,
101 /*********************/
102 /* Aggregation logic */
103 /*********************/
105 static void ath_tx_queue_tid(struct ath_txq *txq, struct ath_atx_tid *tid)
107 struct ath_atx_ac *ac = tid->ac;
116 list_add_tail(&tid->list, &ac->tid_q);
122 list_add_tail(&ac->list, &txq->axq_acq);
125 static void ath_tx_resume_tid(struct ath_softc *sc, struct ath_atx_tid *tid)
127 struct ath_txq *txq = &sc->tx.txq[tid->ac->qnum];
129 WARN_ON(!tid->paused);
131 spin_lock_bh(&txq->axq_lock);
134 if (list_empty(&tid->buf_q))
137 ath_tx_queue_tid(txq, tid);
138 ath_txq_schedule(sc, txq);
140 spin_unlock_bh(&txq->axq_lock);
143 static void ath_tx_flush_tid(struct ath_softc *sc, struct ath_atx_tid *tid)
145 struct ath_txq *txq = &sc->tx.txq[tid->ac->qnum];
147 struct list_head bf_head;
148 struct ath_tx_status ts;
150 INIT_LIST_HEAD(&bf_head);
152 memset(&ts, 0, sizeof(ts));
153 spin_lock_bh(&txq->axq_lock);
155 while (!list_empty(&tid->buf_q)) {
156 bf = list_first_entry(&tid->buf_q, struct ath_buf, list);
157 list_move_tail(&bf->list, &bf_head);
159 if (bf_isretried(bf)) {
160 ath_tx_update_baw(sc, tid, bf->bf_seqno);
161 ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0, 0);
163 ath_tx_send_ht_normal(sc, txq, tid, &bf_head);
167 spin_unlock_bh(&txq->axq_lock);
170 static void ath_tx_update_baw(struct ath_softc *sc, struct ath_atx_tid *tid,
175 index = ATH_BA_INDEX(tid->seq_start, seqno);
176 cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1);
178 __clear_bit(cindex, tid->tx_buf);
180 while (tid->baw_head != tid->baw_tail && !test_bit(tid->baw_head, tid->tx_buf)) {
181 INCR(tid->seq_start, IEEE80211_SEQ_MAX);
182 INCR(tid->baw_head, ATH_TID_MAX_BUFS);
186 static void ath_tx_addto_baw(struct ath_softc *sc, struct ath_atx_tid *tid,
191 if (bf_isretried(bf))
194 index = ATH_BA_INDEX(tid->seq_start, bf->bf_seqno);
195 cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1);
196 __set_bit(cindex, tid->tx_buf);
198 if (index >= ((tid->baw_tail - tid->baw_head) &
199 (ATH_TID_MAX_BUFS - 1))) {
200 tid->baw_tail = cindex;
201 INCR(tid->baw_tail, ATH_TID_MAX_BUFS);
206 * TODO: For frame(s) that are in the retry state, we will reuse the
207 * sequence number(s) without setting the retry bit. The
208 * alternative is to give up on these and BAR the receiver's window
211 static void ath_tid_drain(struct ath_softc *sc, struct ath_txq *txq,
212 struct ath_atx_tid *tid)
216 struct list_head bf_head;
217 struct ath_tx_status ts;
219 memset(&ts, 0, sizeof(ts));
220 INIT_LIST_HEAD(&bf_head);
223 if (list_empty(&tid->buf_q))
226 bf = list_first_entry(&tid->buf_q, struct ath_buf, list);
227 list_move_tail(&bf->list, &bf_head);
229 if (bf_isretried(bf))
230 ath_tx_update_baw(sc, tid, bf->bf_seqno);
232 spin_unlock(&txq->axq_lock);
233 ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0, 0);
234 spin_lock(&txq->axq_lock);
237 tid->seq_next = tid->seq_start;
238 tid->baw_tail = tid->baw_head;
241 static void ath_tx_set_retry(struct ath_softc *sc, struct ath_txq *txq,
245 struct ieee80211_hdr *hdr;
247 bf->bf_state.bf_type |= BUF_RETRY;
249 TX_STAT_INC(txq->axq_qnum, a_retries);
252 hdr = (struct ieee80211_hdr *)skb->data;
253 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_RETRY);
256 static struct ath_buf *ath_tx_get_buffer(struct ath_softc *sc)
258 struct ath_buf *bf = NULL;
260 spin_lock_bh(&sc->tx.txbuflock);
262 if (unlikely(list_empty(&sc->tx.txbuf))) {
263 spin_unlock_bh(&sc->tx.txbuflock);
267 bf = list_first_entry(&sc->tx.txbuf, struct ath_buf, list);
270 spin_unlock_bh(&sc->tx.txbuflock);
275 static void ath_tx_return_buffer(struct ath_softc *sc, struct ath_buf *bf)
277 spin_lock_bh(&sc->tx.txbuflock);
278 list_add_tail(&bf->list, &sc->tx.txbuf);
279 spin_unlock_bh(&sc->tx.txbuflock);
282 static struct ath_buf* ath_clone_txbuf(struct ath_softc *sc, struct ath_buf *bf)
286 tbf = ath_tx_get_buffer(sc);
290 ATH_TXBUF_RESET(tbf);
292 tbf->aphy = bf->aphy;
293 tbf->bf_mpdu = bf->bf_mpdu;
294 tbf->bf_buf_addr = bf->bf_buf_addr;
295 memcpy(tbf->bf_desc, bf->bf_desc, sc->sc_ah->caps.tx_desc_len);
296 tbf->bf_state = bf->bf_state;
297 tbf->bf_dmacontext = bf->bf_dmacontext;
302 static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
303 struct ath_buf *bf, struct list_head *bf_q,
304 struct ath_tx_status *ts, int txok)
306 struct ath_node *an = NULL;
308 struct ieee80211_sta *sta;
309 struct ieee80211_hw *hw;
310 struct ieee80211_hdr *hdr;
311 struct ieee80211_tx_info *tx_info;
312 struct ath_atx_tid *tid = NULL;
313 struct ath_buf *bf_next, *bf_last = bf->bf_lastbf;
314 struct list_head bf_head, bf_pending;
315 u16 seq_st = 0, acked_cnt = 0, txfail_cnt = 0;
316 u32 ba[WME_BA_BMP_SIZE >> 5];
317 int isaggr, txfail, txpending, sendbar = 0, needreset = 0, nbad = 0;
318 bool rc_update = true;
319 struct ieee80211_tx_rate rates[4];
322 hdr = (struct ieee80211_hdr *)skb->data;
324 tx_info = IEEE80211_SKB_CB(skb);
327 memcpy(rates, tx_info->control.rates, sizeof(rates));
331 sta = ieee80211_find_sta_by_ifaddr(hw, hdr->addr1, hdr->addr2);
335 INIT_LIST_HEAD(&bf_head);
337 bf_next = bf->bf_next;
339 bf->bf_state.bf_type |= BUF_XRETRY;
340 if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) ||
341 !bf->bf_stale || bf_next != NULL)
342 list_move_tail(&bf->list, &bf_head);
344 ath_tx_rc_status(bf, ts, 0, 0, false);
345 ath_tx_complete_buf(sc, bf, txq, &bf_head, ts,
353 an = (struct ath_node *)sta->drv_priv;
354 tid = ATH_AN_2_TID(an, bf->bf_tidno);
357 * The hardware occasionally sends a tx status for the wrong TID.
358 * In this case, the BA status cannot be considered valid and all
359 * subframes need to be retransmitted
361 if (bf->bf_tidno != ts->tid)
364 isaggr = bf_isaggr(bf);
365 memset(ba, 0, WME_BA_BMP_SIZE >> 3);
367 if (isaggr && txok) {
368 if (ts->ts_flags & ATH9K_TX_BA) {
369 seq_st = ts->ts_seqnum;
370 memcpy(ba, &ts->ba_low, WME_BA_BMP_SIZE >> 3);
373 * AR5416 can become deaf/mute when BA
374 * issue happens. Chip needs to be reset.
375 * But AP code may have sychronization issues
376 * when perform internal reset in this routine.
377 * Only enable reset in STA mode for now.
379 if (sc->sc_ah->opmode == NL80211_IFTYPE_STATION)
384 INIT_LIST_HEAD(&bf_pending);
385 INIT_LIST_HEAD(&bf_head);
387 nbad = ath_tx_num_badfrms(sc, bf, ts, txok);
389 txfail = txpending = 0;
390 bf_next = bf->bf_next;
393 tx_info = IEEE80211_SKB_CB(skb);
395 if (ATH_BA_ISSET(ba, ATH_BA_INDEX(seq_st, bf->bf_seqno))) {
396 /* transmit completion, subframe is
397 * acked by block ack */
399 } else if (!isaggr && txok) {
400 /* transmit completion */
403 if (!(tid->state & AGGR_CLEANUP) &&
404 !bf_last->bf_tx_aborted) {
405 if (bf->bf_retries < ATH_MAX_SW_RETRIES) {
406 ath_tx_set_retry(sc, txq, bf);
409 bf->bf_state.bf_type |= BUF_XRETRY;
416 * cleanup in progress, just fail
417 * the un-acked sub-frames
423 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
426 * Make sure the last desc is reclaimed if it
427 * not a holding desc.
429 if (!bf_last->bf_stale)
430 list_move_tail(&bf->list, &bf_head);
432 INIT_LIST_HEAD(&bf_head);
434 BUG_ON(list_empty(bf_q));
435 list_move_tail(&bf->list, &bf_head);
438 if (!txpending || (tid->state & AGGR_CLEANUP)) {
440 * complete the acked-ones/xretried ones; update
443 spin_lock_bh(&txq->axq_lock);
444 ath_tx_update_baw(sc, tid, bf->bf_seqno);
445 spin_unlock_bh(&txq->axq_lock);
447 if (rc_update && (acked_cnt == 1 || txfail_cnt == 1)) {
448 memcpy(tx_info->control.rates, rates, sizeof(rates));
449 ath_tx_rc_status(bf, ts, nbad, txok, true);
452 ath_tx_rc_status(bf, ts, nbad, txok, false);
455 ath_tx_complete_buf(sc, bf, txq, &bf_head, ts,
458 /* retry the un-acked ones */
459 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)) {
460 if (bf->bf_next == NULL && bf_last->bf_stale) {
463 tbf = ath_clone_txbuf(sc, bf_last);
465 * Update tx baw and complete the
466 * frame with failed status if we
470 spin_lock_bh(&txq->axq_lock);
471 ath_tx_update_baw(sc, tid,
473 spin_unlock_bh(&txq->axq_lock);
475 bf->bf_state.bf_type |=
477 ath_tx_rc_status(bf, ts, nbad,
479 ath_tx_complete_buf(sc, bf, txq,
485 ath9k_hw_cleartxdesc(sc->sc_ah,
487 list_add_tail(&tbf->list, &bf_head);
490 * Clear descriptor status words for
493 ath9k_hw_cleartxdesc(sc->sc_ah,
499 * Put this buffer to the temporary pending
500 * queue to retain ordering
502 list_splice_tail_init(&bf_head, &bf_pending);
508 /* prepend un-acked frames to the beginning of the pending frame queue */
509 if (!list_empty(&bf_pending)) {
510 spin_lock_bh(&txq->axq_lock);
511 list_splice(&bf_pending, &tid->buf_q);
512 ath_tx_queue_tid(txq, tid);
513 spin_unlock_bh(&txq->axq_lock);
516 if (tid->state & AGGR_CLEANUP) {
517 ath_tx_flush_tid(sc, tid);
519 if (tid->baw_head == tid->baw_tail) {
520 tid->state &= ~AGGR_ADDBA_COMPLETE;
521 tid->state &= ~AGGR_CLEANUP;
528 ath_reset(sc, false);
531 static u32 ath_lookup_rate(struct ath_softc *sc, struct ath_buf *bf,
532 struct ath_atx_tid *tid)
535 struct ieee80211_tx_info *tx_info;
536 struct ieee80211_tx_rate *rates;
537 u32 max_4ms_framelen, frmlen;
538 u16 aggr_limit, legacy = 0;
542 tx_info = IEEE80211_SKB_CB(skb);
543 rates = tx_info->control.rates;
546 * Find the lowest frame length among the rate series that will have a
547 * 4ms transmit duration.
548 * TODO - TXOP limit needs to be considered.
550 max_4ms_framelen = ATH_AMPDU_LIMIT_MAX;
552 for (i = 0; i < 4; i++) {
553 if (rates[i].count) {
555 if (!(rates[i].flags & IEEE80211_TX_RC_MCS)) {
560 if (rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
565 if (rates[i].flags & IEEE80211_TX_RC_SHORT_GI)
568 frmlen = ath_max_4ms_framelen[modeidx][rates[i].idx];
569 max_4ms_framelen = min(max_4ms_framelen, frmlen);
574 * limit aggregate size by the minimum rate if rate selected is
575 * not a probe rate, if rate selected is a probe rate then
576 * avoid aggregation of this packet.
578 if (tx_info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE || legacy)
581 if (sc->sc_flags & SC_OP_BT_PRIORITY_DETECTED)
582 aggr_limit = min((max_4ms_framelen * 3) / 8,
583 (u32)ATH_AMPDU_LIMIT_MAX);
585 aggr_limit = min(max_4ms_framelen,
586 (u32)ATH_AMPDU_LIMIT_MAX);
589 * h/w can accept aggregates upto 16 bit lengths (65535).
590 * The IE, however can hold upto 65536, which shows up here
591 * as zero. Ignore 65536 since we are constrained by hw.
593 if (tid->an->maxampdu)
594 aggr_limit = min(aggr_limit, tid->an->maxampdu);
600 * Returns the number of delimiters to be added to
601 * meet the minimum required mpdudensity.
603 static int ath_compute_num_delims(struct ath_softc *sc, struct ath_atx_tid *tid,
604 struct ath_buf *bf, u16 frmlen)
606 struct sk_buff *skb = bf->bf_mpdu;
607 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
608 u32 nsymbits, nsymbols;
611 int width, streams, half_gi, ndelim, mindelim;
613 /* Select standard number of delimiters based on frame length alone */
614 ndelim = ATH_AGGR_GET_NDELIM(frmlen);
617 * If encryption enabled, hardware requires some more padding between
619 * TODO - this could be improved to be dependent on the rate.
620 * The hardware can keep up at lower rates, but not higher rates
622 if (bf->bf_keytype != ATH9K_KEY_TYPE_CLEAR)
623 ndelim += ATH_AGGR_ENCRYPTDELIM;
626 * Convert desired mpdu density from microeconds to bytes based
627 * on highest rate in rate series (i.e. first rate) to determine
628 * required minimum length for subframe. Take into account
629 * whether high rate is 20 or 40Mhz and half or full GI.
631 * If there is no mpdu density restriction, no further calculation
635 if (tid->an->mpdudensity == 0)
638 rix = tx_info->control.rates[0].idx;
639 flags = tx_info->control.rates[0].flags;
640 width = (flags & IEEE80211_TX_RC_40_MHZ_WIDTH) ? 1 : 0;
641 half_gi = (flags & IEEE80211_TX_RC_SHORT_GI) ? 1 : 0;
644 nsymbols = NUM_SYMBOLS_PER_USEC_HALFGI(tid->an->mpdudensity);
646 nsymbols = NUM_SYMBOLS_PER_USEC(tid->an->mpdudensity);
651 streams = HT_RC_2_STREAMS(rix);
652 nsymbits = bits_per_symbol[rix % 8][width] * streams;
653 minlen = (nsymbols * nsymbits) / BITS_PER_BYTE;
655 if (frmlen < minlen) {
656 mindelim = (minlen - frmlen) / ATH_AGGR_DELIM_SZ;
657 ndelim = max(mindelim, ndelim);
663 static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc,
665 struct ath_atx_tid *tid,
666 struct list_head *bf_q)
668 #define PADBYTES(_len) ((4 - ((_len) % 4)) % 4)
669 struct ath_buf *bf, *bf_first, *bf_prev = NULL;
670 int rl = 0, nframes = 0, ndelim, prev_al = 0;
671 u16 aggr_limit = 0, al = 0, bpad = 0,
672 al_delta, h_baw = tid->baw_size / 2;
673 enum ATH_AGGR_STATUS status = ATH_AGGR_DONE;
675 bf_first = list_first_entry(&tid->buf_q, struct ath_buf, list);
678 bf = list_first_entry(&tid->buf_q, struct ath_buf, list);
680 /* do not step over block-ack window */
681 if (!BAW_WITHIN(tid->seq_start, tid->baw_size, bf->bf_seqno)) {
682 status = ATH_AGGR_BAW_CLOSED;
687 aggr_limit = ath_lookup_rate(sc, bf, tid);
691 /* do not exceed aggregation limit */
692 al_delta = ATH_AGGR_DELIM_SZ + bf->bf_frmlen;
695 (aggr_limit < (al + bpad + al_delta + prev_al))) {
696 status = ATH_AGGR_LIMITED;
700 /* do not exceed subframe limit */
701 if (nframes >= min((int)h_baw, ATH_AMPDU_SUBFRAME_DEFAULT)) {
702 status = ATH_AGGR_LIMITED;
707 /* add padding for previous frame to aggregation length */
708 al += bpad + al_delta;
711 * Get the delimiters needed to meet the MPDU
712 * density for this node.
714 ndelim = ath_compute_num_delims(sc, tid, bf_first, bf->bf_frmlen);
715 bpad = PADBYTES(al_delta) + (ndelim << 2);
718 ath9k_hw_set_desc_link(sc->sc_ah, bf->bf_desc, 0);
720 /* link buffers of this frame to the aggregate */
721 ath_tx_addto_baw(sc, tid, bf);
722 ath9k_hw_set11n_aggr_middle(sc->sc_ah, bf->bf_desc, ndelim);
723 list_move_tail(&bf->list, bf_q);
725 bf_prev->bf_next = bf;
726 ath9k_hw_set_desc_link(sc->sc_ah, bf_prev->bf_desc,
731 } while (!list_empty(&tid->buf_q));
733 bf_first->bf_al = al;
734 bf_first->bf_nframes = nframes;
740 static void ath_tx_sched_aggr(struct ath_softc *sc, struct ath_txq *txq,
741 struct ath_atx_tid *tid)
744 enum ATH_AGGR_STATUS status;
745 struct list_head bf_q;
748 if (list_empty(&tid->buf_q))
751 INIT_LIST_HEAD(&bf_q);
753 status = ath_tx_form_aggr(sc, txq, tid, &bf_q);
756 * no frames picked up to be aggregated;
757 * block-ack window is not open.
759 if (list_empty(&bf_q))
762 bf = list_first_entry(&bf_q, struct ath_buf, list);
763 bf->bf_lastbf = list_entry(bf_q.prev, struct ath_buf, list);
765 /* if only one frame, send as non-aggregate */
766 if (bf->bf_nframes == 1) {
767 bf->bf_state.bf_type &= ~BUF_AGGR;
768 ath9k_hw_clr11n_aggr(sc->sc_ah, bf->bf_desc);
769 ath_buf_set_rate(sc, bf);
770 ath_tx_txqaddbuf(sc, txq, &bf_q);
774 /* setup first desc of aggregate */
775 bf->bf_state.bf_type |= BUF_AGGR;
776 ath_buf_set_rate(sc, bf);
777 ath9k_hw_set11n_aggr_first(sc->sc_ah, bf->bf_desc, bf->bf_al);
779 /* anchor last desc of aggregate */
780 ath9k_hw_set11n_aggr_last(sc->sc_ah, bf->bf_lastbf->bf_desc);
782 ath_tx_txqaddbuf(sc, txq, &bf_q);
783 TX_STAT_INC(txq->axq_qnum, a_aggr);
785 } while (txq->axq_depth < ATH_AGGR_MIN_QDEPTH &&
786 status != ATH_AGGR_BAW_CLOSED);
789 int ath_tx_aggr_start(struct ath_softc *sc, struct ieee80211_sta *sta,
792 struct ath_atx_tid *txtid;
795 an = (struct ath_node *)sta->drv_priv;
796 txtid = ATH_AN_2_TID(an, tid);
798 if (txtid->state & (AGGR_CLEANUP | AGGR_ADDBA_COMPLETE))
801 txtid->state |= AGGR_ADDBA_PROGRESS;
802 txtid->paused = true;
803 *ssn = txtid->seq_start;
808 void ath_tx_aggr_stop(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid)
810 struct ath_node *an = (struct ath_node *)sta->drv_priv;
811 struct ath_atx_tid *txtid = ATH_AN_2_TID(an, tid);
812 struct ath_txq *txq = &sc->tx.txq[txtid->ac->qnum];
814 if (txtid->state & AGGR_CLEANUP)
817 if (!(txtid->state & AGGR_ADDBA_COMPLETE)) {
818 txtid->state &= ~AGGR_ADDBA_PROGRESS;
822 spin_lock_bh(&txq->axq_lock);
823 txtid->paused = true;
826 * If frames are still being transmitted for this TID, they will be
827 * cleaned up during tx completion. To prevent race conditions, this
828 * TID can only be reused after all in-progress subframes have been
831 if (txtid->baw_head != txtid->baw_tail)
832 txtid->state |= AGGR_CLEANUP;
834 txtid->state &= ~AGGR_ADDBA_COMPLETE;
835 spin_unlock_bh(&txq->axq_lock);
837 ath_tx_flush_tid(sc, txtid);
840 void ath_tx_aggr_resume(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid)
842 struct ath_atx_tid *txtid;
845 an = (struct ath_node *)sta->drv_priv;
847 if (sc->sc_flags & SC_OP_TXAGGR) {
848 txtid = ATH_AN_2_TID(an, tid);
850 IEEE80211_MIN_AMPDU_BUF << sta->ht_cap.ampdu_factor;
851 txtid->state |= AGGR_ADDBA_COMPLETE;
852 txtid->state &= ~AGGR_ADDBA_PROGRESS;
853 ath_tx_resume_tid(sc, txtid);
857 /********************/
858 /* Queue Management */
859 /********************/
861 static void ath_txq_drain_pending_buffers(struct ath_softc *sc,
864 struct ath_atx_ac *ac, *ac_tmp;
865 struct ath_atx_tid *tid, *tid_tmp;
867 list_for_each_entry_safe(ac, ac_tmp, &txq->axq_acq, list) {
870 list_for_each_entry_safe(tid, tid_tmp, &ac->tid_q, list) {
871 list_del(&tid->list);
873 ath_tid_drain(sc, txq, tid);
878 struct ath_txq *ath_txq_setup(struct ath_softc *sc, int qtype, int subtype)
880 struct ath_hw *ah = sc->sc_ah;
881 struct ath_common *common = ath9k_hw_common(ah);
882 struct ath9k_tx_queue_info qi;
885 memset(&qi, 0, sizeof(qi));
886 qi.tqi_subtype = subtype;
887 qi.tqi_aifs = ATH9K_TXQ_USEDEFAULT;
888 qi.tqi_cwmin = ATH9K_TXQ_USEDEFAULT;
889 qi.tqi_cwmax = ATH9K_TXQ_USEDEFAULT;
890 qi.tqi_physCompBuf = 0;
893 * Enable interrupts only for EOL and DESC conditions.
894 * We mark tx descriptors to receive a DESC interrupt
895 * when a tx queue gets deep; otherwise waiting for the
896 * EOL to reap descriptors. Note that this is done to
897 * reduce interrupt load and this only defers reaping
898 * descriptors, never transmitting frames. Aside from
899 * reducing interrupts this also permits more concurrency.
900 * The only potential downside is if the tx queue backs
901 * up in which case the top half of the kernel may backup
902 * due to a lack of tx descriptors.
904 * The UAPSD queue is an exception, since we take a desc-
905 * based intr on the EOSP frames.
907 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
908 qi.tqi_qflags = TXQ_FLAG_TXOKINT_ENABLE |
909 TXQ_FLAG_TXERRINT_ENABLE;
911 if (qtype == ATH9K_TX_QUEUE_UAPSD)
912 qi.tqi_qflags = TXQ_FLAG_TXDESCINT_ENABLE;
914 qi.tqi_qflags = TXQ_FLAG_TXEOLINT_ENABLE |
915 TXQ_FLAG_TXDESCINT_ENABLE;
917 qnum = ath9k_hw_setuptxqueue(ah, qtype, &qi);
920 * NB: don't print a message, this happens
921 * normally on parts with too few tx queues
925 if (qnum >= ARRAY_SIZE(sc->tx.txq)) {
926 ath_print(common, ATH_DBG_FATAL,
927 "qnum %u out of range, max %u!\n",
928 qnum, (unsigned int)ARRAY_SIZE(sc->tx.txq));
929 ath9k_hw_releasetxqueue(ah, qnum);
932 if (!ATH_TXQ_SETUP(sc, qnum)) {
933 struct ath_txq *txq = &sc->tx.txq[qnum];
935 txq->axq_class = subtype;
936 txq->axq_qnum = qnum;
937 txq->axq_link = NULL;
938 INIT_LIST_HEAD(&txq->axq_q);
939 INIT_LIST_HEAD(&txq->axq_acq);
940 spin_lock_init(&txq->axq_lock);
942 txq->axq_tx_inprogress = false;
943 sc->tx.txqsetup |= 1<<qnum;
945 txq->txq_headidx = txq->txq_tailidx = 0;
946 for (i = 0; i < ATH_TXFIFO_DEPTH; i++)
947 INIT_LIST_HEAD(&txq->txq_fifo[i]);
948 INIT_LIST_HEAD(&txq->txq_fifo_pending);
950 return &sc->tx.txq[qnum];
953 int ath_txq_update(struct ath_softc *sc, int qnum,
954 struct ath9k_tx_queue_info *qinfo)
956 struct ath_hw *ah = sc->sc_ah;
958 struct ath9k_tx_queue_info qi;
960 if (qnum == sc->beacon.beaconq) {
962 * XXX: for beacon queue, we just save the parameter.
963 * It will be picked up by ath_beaconq_config when
966 sc->beacon.beacon_qi = *qinfo;
970 BUG_ON(sc->tx.txq[qnum].axq_qnum != qnum);
972 ath9k_hw_get_txq_props(ah, qnum, &qi);
973 qi.tqi_aifs = qinfo->tqi_aifs;
974 qi.tqi_cwmin = qinfo->tqi_cwmin;
975 qi.tqi_cwmax = qinfo->tqi_cwmax;
976 qi.tqi_burstTime = qinfo->tqi_burstTime;
977 qi.tqi_readyTime = qinfo->tqi_readyTime;
979 if (!ath9k_hw_set_txq_props(ah, qnum, &qi)) {
980 ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL,
981 "Unable to update hardware queue %u!\n", qnum);
984 ath9k_hw_resettxqueue(ah, qnum);
990 int ath_cabq_update(struct ath_softc *sc)
992 struct ath9k_tx_queue_info qi;
993 int qnum = sc->beacon.cabq->axq_qnum;
995 ath9k_hw_get_txq_props(sc->sc_ah, qnum, &qi);
997 * Ensure the readytime % is within the bounds.
999 if (sc->config.cabqReadytime < ATH9K_READY_TIME_LO_BOUND)
1000 sc->config.cabqReadytime = ATH9K_READY_TIME_LO_BOUND;
1001 else if (sc->config.cabqReadytime > ATH9K_READY_TIME_HI_BOUND)
1002 sc->config.cabqReadytime = ATH9K_READY_TIME_HI_BOUND;
1004 qi.tqi_readyTime = (sc->beacon_interval *
1005 sc->config.cabqReadytime) / 100;
1006 ath_txq_update(sc, qnum, &qi);
1012 * Drain a given TX queue (could be Beacon or Data)
1014 * This assumes output has been stopped and
1015 * we do not need to block ath_tx_tasklet.
1017 void ath_draintxq(struct ath_softc *sc, struct ath_txq *txq, bool retry_tx)
1019 struct ath_buf *bf, *lastbf;
1020 struct list_head bf_head;
1021 struct ath_tx_status ts;
1023 memset(&ts, 0, sizeof(ts));
1024 INIT_LIST_HEAD(&bf_head);
1027 spin_lock_bh(&txq->axq_lock);
1029 if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
1030 if (list_empty(&txq->txq_fifo[txq->txq_tailidx])) {
1031 txq->txq_headidx = txq->txq_tailidx = 0;
1032 spin_unlock_bh(&txq->axq_lock);
1035 bf = list_first_entry(&txq->txq_fifo[txq->txq_tailidx],
1036 struct ath_buf, list);
1039 if (list_empty(&txq->axq_q)) {
1040 txq->axq_link = NULL;
1041 spin_unlock_bh(&txq->axq_lock);
1044 bf = list_first_entry(&txq->axq_q, struct ath_buf,
1048 list_del(&bf->list);
1049 spin_unlock_bh(&txq->axq_lock);
1051 ath_tx_return_buffer(sc, bf);
1056 lastbf = bf->bf_lastbf;
1058 lastbf->bf_tx_aborted = true;
1060 if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
1061 list_cut_position(&bf_head,
1062 &txq->txq_fifo[txq->txq_tailidx],
1064 INCR(txq->txq_tailidx, ATH_TXFIFO_DEPTH);
1066 /* remove ath_buf's of the same mpdu from txq */
1067 list_cut_position(&bf_head, &txq->axq_q, &lastbf->list);
1072 spin_unlock_bh(&txq->axq_lock);
1075 ath_tx_complete_aggr(sc, txq, bf, &bf_head, &ts, 0);
1077 ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0, 0);
1080 spin_lock_bh(&txq->axq_lock);
1081 txq->axq_tx_inprogress = false;
1082 spin_unlock_bh(&txq->axq_lock);
1084 /* flush any pending frames if aggregation is enabled */
1085 if (sc->sc_flags & SC_OP_TXAGGR) {
1087 spin_lock_bh(&txq->axq_lock);
1088 ath_txq_drain_pending_buffers(sc, txq);
1089 spin_unlock_bh(&txq->axq_lock);
1093 if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
1094 spin_lock_bh(&txq->axq_lock);
1095 while (!list_empty(&txq->txq_fifo_pending)) {
1096 bf = list_first_entry(&txq->txq_fifo_pending,
1097 struct ath_buf, list);
1098 list_cut_position(&bf_head,
1099 &txq->txq_fifo_pending,
1100 &bf->bf_lastbf->list);
1101 spin_unlock_bh(&txq->axq_lock);
1104 ath_tx_complete_aggr(sc, txq, bf, &bf_head,
1107 ath_tx_complete_buf(sc, bf, txq, &bf_head,
1109 spin_lock_bh(&txq->axq_lock);
1111 spin_unlock_bh(&txq->axq_lock);
1115 void ath_drain_all_txq(struct ath_softc *sc, bool retry_tx)
1117 struct ath_hw *ah = sc->sc_ah;
1118 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1119 struct ath_txq *txq;
1122 if (sc->sc_flags & SC_OP_INVALID)
1125 /* Stop beacon queue */
1126 ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
1128 /* Stop data queues */
1129 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
1130 if (ATH_TXQ_SETUP(sc, i)) {
1131 txq = &sc->tx.txq[i];
1132 ath9k_hw_stoptxdma(ah, txq->axq_qnum);
1133 npend += ath9k_hw_numtxpending(ah, txq->axq_qnum);
1140 ath_print(common, ATH_DBG_FATAL,
1141 "Failed to stop TX DMA. Resetting hardware!\n");
1143 spin_lock_bh(&sc->sc_resetlock);
1144 r = ath9k_hw_reset(ah, sc->sc_ah->curchan, ah->caldata, false);
1146 ath_print(common, ATH_DBG_FATAL,
1147 "Unable to reset hardware; reset status %d\n",
1149 spin_unlock_bh(&sc->sc_resetlock);
1152 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
1153 if (ATH_TXQ_SETUP(sc, i))
1154 ath_draintxq(sc, &sc->tx.txq[i], retry_tx);
1158 void ath_tx_cleanupq(struct ath_softc *sc, struct ath_txq *txq)
1160 ath9k_hw_releasetxqueue(sc->sc_ah, txq->axq_qnum);
1161 sc->tx.txqsetup &= ~(1<<txq->axq_qnum);
1164 void ath_txq_schedule(struct ath_softc *sc, struct ath_txq *txq)
1166 struct ath_atx_ac *ac;
1167 struct ath_atx_tid *tid;
1169 if (list_empty(&txq->axq_acq))
1172 ac = list_first_entry(&txq->axq_acq, struct ath_atx_ac, list);
1173 list_del(&ac->list);
1177 if (list_empty(&ac->tid_q))
1180 tid = list_first_entry(&ac->tid_q, struct ath_atx_tid, list);
1181 list_del(&tid->list);
1187 ath_tx_sched_aggr(sc, txq, tid);
1190 * add tid to round-robin queue if more frames
1191 * are pending for the tid
1193 if (!list_empty(&tid->buf_q))
1194 ath_tx_queue_tid(txq, tid);
1197 } while (!list_empty(&ac->tid_q));
1199 if (!list_empty(&ac->tid_q)) {
1202 list_add_tail(&ac->list, &txq->axq_acq);
1207 int ath_tx_setup(struct ath_softc *sc, int haltype)
1209 struct ath_txq *txq;
1211 if (haltype >= ARRAY_SIZE(sc->tx.hwq_map)) {
1212 ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL,
1213 "HAL AC %u out of range, max %zu!\n",
1214 haltype, ARRAY_SIZE(sc->tx.hwq_map));
1217 txq = ath_txq_setup(sc, ATH9K_TX_QUEUE_DATA, haltype);
1219 sc->tx.hwq_map[haltype] = txq->axq_qnum;
1230 * Insert a chain of ath_buf (descriptors) on a txq and
1231 * assume the descriptors are already chained together by caller.
1233 static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq,
1234 struct list_head *head)
1236 struct ath_hw *ah = sc->sc_ah;
1237 struct ath_common *common = ath9k_hw_common(ah);
1241 * Insert the frame on the outbound list and
1242 * pass it on to the hardware.
1245 if (list_empty(head))
1248 bf = list_first_entry(head, struct ath_buf, list);
1250 ath_print(common, ATH_DBG_QUEUE,
1251 "qnum: %d, txq depth: %d\n", txq->axq_qnum, txq->axq_depth);
1253 if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
1254 if (txq->axq_depth >= ATH_TXFIFO_DEPTH) {
1255 list_splice_tail_init(head, &txq->txq_fifo_pending);
1258 if (!list_empty(&txq->txq_fifo[txq->txq_headidx]))
1259 ath_print(common, ATH_DBG_XMIT,
1260 "Initializing tx fifo %d which "
1263 INIT_LIST_HEAD(&txq->txq_fifo[txq->txq_headidx]);
1264 list_splice_init(head, &txq->txq_fifo[txq->txq_headidx]);
1265 INCR(txq->txq_headidx, ATH_TXFIFO_DEPTH);
1266 ath9k_hw_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr);
1267 ath_print(common, ATH_DBG_XMIT,
1268 "TXDP[%u] = %llx (%p)\n",
1269 txq->axq_qnum, ito64(bf->bf_daddr), bf->bf_desc);
1271 list_splice_tail_init(head, &txq->axq_q);
1273 if (txq->axq_link == NULL) {
1274 ath9k_hw_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr);
1275 ath_print(common, ATH_DBG_XMIT,
1276 "TXDP[%u] = %llx (%p)\n",
1277 txq->axq_qnum, ito64(bf->bf_daddr),
1280 *txq->axq_link = bf->bf_daddr;
1281 ath_print(common, ATH_DBG_XMIT,
1282 "link[%u] (%p)=%llx (%p)\n",
1283 txq->axq_qnum, txq->axq_link,
1284 ito64(bf->bf_daddr), bf->bf_desc);
1286 ath9k_hw_get_desc_link(ah, bf->bf_lastbf->bf_desc,
1288 ath9k_hw_txstart(ah, txq->axq_qnum);
1293 static void ath_tx_send_ampdu(struct ath_softc *sc, struct ath_atx_tid *tid,
1294 struct list_head *bf_head,
1295 struct ath_tx_control *txctl)
1299 bf = list_first_entry(bf_head, struct ath_buf, list);
1300 bf->bf_state.bf_type |= BUF_AMPDU;
1301 TX_STAT_INC(txctl->txq->axq_qnum, a_queued);
1304 * Do not queue to h/w when any of the following conditions is true:
1305 * - there are pending frames in software queue
1306 * - the TID is currently paused for ADDBA/BAR request
1307 * - seqno is not within block-ack window
1308 * - h/w queue depth exceeds low water mark
1310 if (!list_empty(&tid->buf_q) || tid->paused ||
1311 !BAW_WITHIN(tid->seq_start, tid->baw_size, bf->bf_seqno) ||
1312 txctl->txq->axq_depth >= ATH_AGGR_MIN_QDEPTH) {
1314 * Add this frame to software queue for scheduling later
1317 list_move_tail(&bf->list, &tid->buf_q);
1318 ath_tx_queue_tid(txctl->txq, tid);
1322 /* Add sub-frame to BAW */
1323 ath_tx_addto_baw(sc, tid, bf);
1325 /* Queue to h/w without aggregation */
1328 ath_buf_set_rate(sc, bf);
1329 ath_tx_txqaddbuf(sc, txctl->txq, bf_head);
1332 static void ath_tx_send_ht_normal(struct ath_softc *sc, struct ath_txq *txq,
1333 struct ath_atx_tid *tid,
1334 struct list_head *bf_head)
1338 bf = list_first_entry(bf_head, struct ath_buf, list);
1339 bf->bf_state.bf_type &= ~BUF_AMPDU;
1341 /* update starting sequence number for subsequent ADDBA request */
1342 INCR(tid->seq_start, IEEE80211_SEQ_MAX);
1346 ath_buf_set_rate(sc, bf);
1347 ath_tx_txqaddbuf(sc, txq, bf_head);
1348 TX_STAT_INC(txq->axq_qnum, queued);
1351 static void ath_tx_send_normal(struct ath_softc *sc, struct ath_txq *txq,
1352 struct list_head *bf_head)
1356 bf = list_first_entry(bf_head, struct ath_buf, list);
1360 ath_buf_set_rate(sc, bf);
1361 ath_tx_txqaddbuf(sc, txq, bf_head);
1362 TX_STAT_INC(txq->axq_qnum, queued);
1365 static enum ath9k_pkt_type get_hw_packet_type(struct sk_buff *skb)
1367 struct ieee80211_hdr *hdr;
1368 enum ath9k_pkt_type htype;
1371 hdr = (struct ieee80211_hdr *)skb->data;
1372 fc = hdr->frame_control;
1374 if (ieee80211_is_beacon(fc))
1375 htype = ATH9K_PKT_TYPE_BEACON;
1376 else if (ieee80211_is_probe_resp(fc))
1377 htype = ATH9K_PKT_TYPE_PROBE_RESP;
1378 else if (ieee80211_is_atim(fc))
1379 htype = ATH9K_PKT_TYPE_ATIM;
1380 else if (ieee80211_is_pspoll(fc))
1381 htype = ATH9K_PKT_TYPE_PSPOLL;
1383 htype = ATH9K_PKT_TYPE_NORMAL;
1388 static void assign_aggr_tid_seqno(struct sk_buff *skb,
1391 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
1392 struct ieee80211_hdr *hdr;
1393 struct ath_node *an;
1394 struct ath_atx_tid *tid;
1398 if (!tx_info->control.sta)
1401 an = (struct ath_node *)tx_info->control.sta->drv_priv;
1402 hdr = (struct ieee80211_hdr *)skb->data;
1403 fc = hdr->frame_control;
1405 if (ieee80211_is_data_qos(fc)) {
1406 qc = ieee80211_get_qos_ctl(hdr);
1407 bf->bf_tidno = qc[0] & 0xf;
1411 * For HT capable stations, we save tidno for later use.
1412 * We also override seqno set by upper layer with the one
1413 * in tx aggregation state.
1415 tid = ATH_AN_2_TID(an, bf->bf_tidno);
1416 hdr->seq_ctrl = cpu_to_le16(tid->seq_next << IEEE80211_SEQ_SEQ_SHIFT);
1417 bf->bf_seqno = tid->seq_next;
1418 INCR(tid->seq_next, IEEE80211_SEQ_MAX);
1421 static int setup_tx_flags(struct sk_buff *skb, bool use_ldpc)
1423 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
1426 flags |= ATH9K_TXDESC_CLRDMASK; /* needed for crypto errors */
1427 flags |= ATH9K_TXDESC_INTREQ;
1429 if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK)
1430 flags |= ATH9K_TXDESC_NOACK;
1433 flags |= ATH9K_TXDESC_LDPC;
1440 * pktlen - total bytes (delims + data + fcs + pads + pad delims)
1441 * width - 0 for 20 MHz, 1 for 40 MHz
1442 * half_gi - to use 4us v/s 3.6 us for symbol time
1444 static u32 ath_pkt_duration(struct ath_softc *sc, u8 rix, struct ath_buf *bf,
1445 int width, int half_gi, bool shortPreamble)
1447 u32 nbits, nsymbits, duration, nsymbols;
1448 int streams, pktlen;
1450 pktlen = bf_isaggr(bf) ? bf->bf_al : bf->bf_frmlen;
1452 /* find number of symbols: PLCP + data */
1453 streams = HT_RC_2_STREAMS(rix);
1454 nbits = (pktlen << 3) + OFDM_PLCP_BITS;
1455 nsymbits = bits_per_symbol[rix % 8][width] * streams;
1456 nsymbols = (nbits + nsymbits - 1) / nsymbits;
1459 duration = SYMBOL_TIME(nsymbols);
1461 duration = SYMBOL_TIME_HALFGI(nsymbols);
1463 /* addup duration for legacy/ht training and signal fields */
1464 duration += L_STF + L_LTF + L_SIG + HT_SIG + HT_STF + HT_LTF(streams);
1469 static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf)
1471 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1472 struct ath9k_11n_rate_series series[4];
1473 struct sk_buff *skb;
1474 struct ieee80211_tx_info *tx_info;
1475 struct ieee80211_tx_rate *rates;
1476 const struct ieee80211_rate *rate;
1477 struct ieee80211_hdr *hdr;
1479 u8 rix = 0, ctsrate = 0;
1482 memset(series, 0, sizeof(struct ath9k_11n_rate_series) * 4);
1485 tx_info = IEEE80211_SKB_CB(skb);
1486 rates = tx_info->control.rates;
1487 hdr = (struct ieee80211_hdr *)skb->data;
1488 is_pspoll = ieee80211_is_pspoll(hdr->frame_control);
1491 * We check if Short Preamble is needed for the CTS rate by
1492 * checking the BSS's global flag.
1493 * But for the rate series, IEEE80211_TX_RC_USE_SHORT_PREAMBLE is used.
1495 rate = ieee80211_get_rts_cts_rate(sc->hw, tx_info);
1496 ctsrate = rate->hw_value;
1497 if (sc->sc_flags & SC_OP_PREAMBLE_SHORT)
1498 ctsrate |= rate->hw_value_short;
1500 for (i = 0; i < 4; i++) {
1501 bool is_40, is_sgi, is_sp;
1504 if (!rates[i].count || (rates[i].idx < 0))
1508 series[i].Tries = rates[i].count;
1509 series[i].ChSel = common->tx_chainmask;
1511 if ((sc->config.ath_aggr_prot && bf_isaggr(bf)) ||
1512 (rates[i].flags & IEEE80211_TX_RC_USE_RTS_CTS)) {
1513 series[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS;
1514 flags |= ATH9K_TXDESC_RTSENA;
1515 } else if (rates[i].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
1516 series[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS;
1517 flags |= ATH9K_TXDESC_CTSENA;
1520 if (rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
1521 series[i].RateFlags |= ATH9K_RATESERIES_2040;
1522 if (rates[i].flags & IEEE80211_TX_RC_SHORT_GI)
1523 series[i].RateFlags |= ATH9K_RATESERIES_HALFGI;
1525 is_sgi = !!(rates[i].flags & IEEE80211_TX_RC_SHORT_GI);
1526 is_40 = !!(rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH);
1527 is_sp = !!(rates[i].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE);
1529 if (rates[i].flags & IEEE80211_TX_RC_MCS) {
1531 series[i].Rate = rix | 0x80;
1532 series[i].PktDuration = ath_pkt_duration(sc, rix, bf,
1533 is_40, is_sgi, is_sp);
1534 if (rix < 8 && (tx_info->flags & IEEE80211_TX_CTL_STBC))
1535 series[i].RateFlags |= ATH9K_RATESERIES_STBC;
1540 if ((tx_info->band == IEEE80211_BAND_2GHZ) &&
1541 !(rate->flags & IEEE80211_RATE_ERP_G))
1542 phy = WLAN_RC_PHY_CCK;
1544 phy = WLAN_RC_PHY_OFDM;
1546 rate = &sc->sbands[tx_info->band].bitrates[rates[i].idx];
1547 series[i].Rate = rate->hw_value;
1548 if (rate->hw_value_short) {
1549 if (rates[i].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
1550 series[i].Rate |= rate->hw_value_short;
1555 series[i].PktDuration = ath9k_hw_computetxtime(sc->sc_ah,
1556 phy, rate->bitrate * 100, bf->bf_frmlen, rix, is_sp);
1559 /* For AR5416 - RTS cannot be followed by a frame larger than 8K */
1560 if (bf_isaggr(bf) && (bf->bf_al > sc->sc_ah->caps.rts_aggr_limit))
1561 flags &= ~ATH9K_TXDESC_RTSENA;
1563 /* ATH9K_TXDESC_RTSENA and ATH9K_TXDESC_CTSENA are mutually exclusive. */
1564 if (flags & ATH9K_TXDESC_RTSENA)
1565 flags &= ~ATH9K_TXDESC_CTSENA;
1567 /* set dur_update_en for l-sig computation except for PS-Poll frames */
1568 ath9k_hw_set11n_ratescenario(sc->sc_ah, bf->bf_desc,
1569 bf->bf_lastbf->bf_desc,
1570 !is_pspoll, ctsrate,
1571 0, series, 4, flags);
1573 if (sc->config.ath_aggr_prot && flags)
1574 ath9k_hw_set11n_burstduration(sc->sc_ah, bf->bf_desc, 8192);
1577 static int ath_tx_setup_buffer(struct ieee80211_hw *hw, struct ath_buf *bf,
1578 struct sk_buff *skb,
1579 struct ath_tx_control *txctl)
1581 struct ath_wiphy *aphy = hw->priv;
1582 struct ath_softc *sc = aphy->sc;
1583 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
1584 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1587 int padpos, padsize;
1588 bool use_ldpc = false;
1590 tx_info->pad[0] = 0;
1591 switch (txctl->frame_type) {
1592 case ATH9K_IFT_NOT_INTERNAL:
1594 case ATH9K_IFT_PAUSE:
1595 tx_info->pad[0] |= ATH_TX_INFO_FRAME_TYPE_PAUSE;
1597 case ATH9K_IFT_UNPAUSE:
1598 tx_info->pad[0] |= ATH_TX_INFO_FRAME_TYPE_INTERNAL;
1601 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1602 fc = hdr->frame_control;
1604 ATH_TXBUF_RESET(bf);
1607 bf->bf_frmlen = skb->len + FCS_LEN;
1608 /* Remove the padding size from bf_frmlen, if any */
1609 padpos = ath9k_cmn_padpos(hdr->frame_control);
1610 padsize = padpos & 3;
1611 if (padsize && skb->len>padpos+padsize) {
1612 bf->bf_frmlen -= padsize;
1615 if (!txctl->paprd && conf_is_ht(&hw->conf)) {
1616 bf->bf_state.bf_type |= BUF_HT;
1617 if (tx_info->flags & IEEE80211_TX_CTL_LDPC)
1621 bf->bf_state.bfs_paprd = txctl->paprd;
1623 bf->bf_state.bfs_paprd_timestamp = jiffies;
1624 bf->bf_flags = setup_tx_flags(skb, use_ldpc);
1626 bf->bf_keytype = ath9k_cmn_get_hw_crypto_keytype(skb);
1627 if (bf->bf_keytype != ATH9K_KEY_TYPE_CLEAR) {
1628 bf->bf_frmlen += tx_info->control.hw_key->icv_len;
1629 bf->bf_keyix = tx_info->control.hw_key->hw_key_idx;
1631 bf->bf_keyix = ATH9K_TXKEYIX_INVALID;
1634 if (ieee80211_is_data_qos(fc) && bf_isht(bf) &&
1635 (sc->sc_flags & SC_OP_TXAGGR))
1636 assign_aggr_tid_seqno(skb, bf);
1640 bf->bf_dmacontext = dma_map_single(sc->dev, skb->data,
1641 skb->len, DMA_TO_DEVICE);
1642 if (unlikely(dma_mapping_error(sc->dev, bf->bf_dmacontext))) {
1644 ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL,
1645 "dma_mapping_error() on TX\n");
1649 bf->bf_buf_addr = bf->bf_dmacontext;
1651 bf->bf_tx_aborted = false;
1656 /* FIXME: tx power */
1657 static void ath_tx_start_dma(struct ath_softc *sc, struct ath_buf *bf,
1658 struct ath_tx_control *txctl)
1660 struct sk_buff *skb = bf->bf_mpdu;
1661 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
1662 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1663 struct ath_node *an = NULL;
1664 struct list_head bf_head;
1665 struct ath_desc *ds;
1666 struct ath_atx_tid *tid;
1667 struct ath_hw *ah = sc->sc_ah;
1671 frm_type = get_hw_packet_type(skb);
1672 fc = hdr->frame_control;
1674 INIT_LIST_HEAD(&bf_head);
1675 list_add_tail(&bf->list, &bf_head);
1678 ath9k_hw_set_desc_link(ah, ds, 0);
1680 ath9k_hw_set11n_txdesc(ah, ds, bf->bf_frmlen, frm_type, MAX_RATE_POWER,
1681 bf->bf_keyix, bf->bf_keytype, bf->bf_flags);
1683 ath9k_hw_filltxdesc(ah, ds,
1684 skb->len, /* segment length */
1685 true, /* first segment */
1686 true, /* last segment */
1687 ds, /* first descriptor */
1689 txctl->txq->axq_qnum);
1691 if (bf->bf_state.bfs_paprd)
1692 ar9003_hw_set_paprd_txdesc(ah, ds, bf->bf_state.bfs_paprd);
1694 spin_lock_bh(&txctl->txq->axq_lock);
1696 if (bf_isht(bf) && (sc->sc_flags & SC_OP_TXAGGR) &&
1697 tx_info->control.sta) {
1698 an = (struct ath_node *)tx_info->control.sta->drv_priv;
1699 tid = ATH_AN_2_TID(an, bf->bf_tidno);
1701 if (!ieee80211_is_data_qos(fc)) {
1702 ath_tx_send_normal(sc, txctl->txq, &bf_head);
1706 if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) {
1708 * Try aggregation if it's a unicast data frame
1709 * and the destination is HT capable.
1711 ath_tx_send_ampdu(sc, tid, &bf_head, txctl);
1714 * Send this frame as regular when ADDBA
1715 * exchange is neither complete nor pending.
1717 ath_tx_send_ht_normal(sc, txctl->txq,
1721 ath_tx_send_normal(sc, txctl->txq, &bf_head);
1725 spin_unlock_bh(&txctl->txq->axq_lock);
1728 /* Upon failure caller should free skb */
1729 int ath_tx_start(struct ieee80211_hw *hw, struct sk_buff *skb,
1730 struct ath_tx_control *txctl)
1732 struct ath_wiphy *aphy = hw->priv;
1733 struct ath_softc *sc = aphy->sc;
1734 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1735 struct ath_txq *txq = txctl->txq;
1739 bf = ath_tx_get_buffer(sc);
1741 ath_print(common, ATH_DBG_XMIT, "TX buffers are full\n");
1745 r = ath_tx_setup_buffer(hw, bf, skb, txctl);
1747 ath_print(common, ATH_DBG_FATAL, "TX mem alloc failure\n");
1749 /* upon ath_tx_processq() this TX queue will be resumed, we
1750 * guarantee this will happen by knowing beforehand that
1751 * we will at least have to run TX completionon one buffer
1753 spin_lock_bh(&txq->axq_lock);
1754 if (!txq->stopped && txq->axq_depth > 1) {
1755 ath_mac80211_stop_queue(sc, skb_get_queue_mapping(skb));
1758 spin_unlock_bh(&txq->axq_lock);
1760 ath_tx_return_buffer(sc, bf);
1765 q = skb_get_queue_mapping(skb);
1769 spin_lock_bh(&txq->axq_lock);
1770 if (++sc->tx.pending_frames[q] > ATH_MAX_QDEPTH && !txq->stopped) {
1771 ath_mac80211_stop_queue(sc, skb_get_queue_mapping(skb));
1774 spin_unlock_bh(&txq->axq_lock);
1776 ath_tx_start_dma(sc, bf, txctl);
1781 void ath_tx_cabq(struct ieee80211_hw *hw, struct sk_buff *skb)
1783 struct ath_wiphy *aphy = hw->priv;
1784 struct ath_softc *sc = aphy->sc;
1785 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1786 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1787 int padpos, padsize;
1788 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1789 struct ath_tx_control txctl;
1791 memset(&txctl, 0, sizeof(struct ath_tx_control));
1794 * As a temporary workaround, assign seq# here; this will likely need
1795 * to be cleaned up to work better with Beacon transmission and virtual
1798 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1799 if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
1800 sc->tx.seq_no += 0x10;
1801 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1802 hdr->seq_ctrl |= cpu_to_le16(sc->tx.seq_no);
1805 /* Add the padding after the header if this is not already done */
1806 padpos = ath9k_cmn_padpos(hdr->frame_control);
1807 padsize = padpos & 3;
1808 if (padsize && skb->len>padpos) {
1809 if (skb_headroom(skb) < padsize) {
1810 ath_print(common, ATH_DBG_XMIT,
1811 "TX CABQ padding failed\n");
1812 dev_kfree_skb_any(skb);
1815 skb_push(skb, padsize);
1816 memmove(skb->data, skb->data + padsize, padpos);
1819 txctl.txq = sc->beacon.cabq;
1821 ath_print(common, ATH_DBG_XMIT,
1822 "transmitting CABQ packet, skb: %p\n", skb);
1824 if (ath_tx_start(hw, skb, &txctl) != 0) {
1825 ath_print(common, ATH_DBG_XMIT, "CABQ TX failed\n");
1831 dev_kfree_skb_any(skb);
1838 static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb,
1839 struct ath_wiphy *aphy, int tx_flags)
1841 struct ieee80211_hw *hw = sc->hw;
1842 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
1843 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1844 struct ieee80211_hdr * hdr = (struct ieee80211_hdr *)skb->data;
1845 int q, padpos, padsize;
1847 ath_print(common, ATH_DBG_XMIT, "TX complete: skb: %p\n", skb);
1852 if (tx_flags & ATH_TX_BAR)
1853 tx_info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1855 if (!(tx_flags & (ATH_TX_ERROR | ATH_TX_XRETRY))) {
1856 /* Frame was ACKed */
1857 tx_info->flags |= IEEE80211_TX_STAT_ACK;
1860 padpos = ath9k_cmn_padpos(hdr->frame_control);
1861 padsize = padpos & 3;
1862 if (padsize && skb->len>padpos+padsize) {
1864 * Remove MAC header padding before giving the frame back to
1867 memmove(skb->data + padsize, skb->data, padpos);
1868 skb_pull(skb, padsize);
1871 if (sc->ps_flags & PS_WAIT_FOR_TX_ACK) {
1872 sc->ps_flags &= ~PS_WAIT_FOR_TX_ACK;
1873 ath_print(common, ATH_DBG_PS,
1874 "Going back to sleep after having "
1875 "received TX status (0x%lx)\n",
1876 sc->ps_flags & (PS_WAIT_FOR_BEACON |
1878 PS_WAIT_FOR_PSPOLL_DATA |
1879 PS_WAIT_FOR_TX_ACK));
1882 if (unlikely(tx_info->pad[0] & ATH_TX_INFO_FRAME_TYPE_INTERNAL))
1883 ath9k_tx_status(hw, skb);
1885 q = skb_get_queue_mapping(skb);
1889 if (--sc->tx.pending_frames[q] < 0)
1890 sc->tx.pending_frames[q] = 0;
1892 ieee80211_tx_status(hw, skb);
1896 static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf,
1897 struct ath_txq *txq, struct list_head *bf_q,
1898 struct ath_tx_status *ts, int txok, int sendbar)
1900 struct sk_buff *skb = bf->bf_mpdu;
1901 unsigned long flags;
1905 tx_flags = ATH_TX_BAR;
1908 tx_flags |= ATH_TX_ERROR;
1910 if (bf_isxretried(bf))
1911 tx_flags |= ATH_TX_XRETRY;
1914 dma_unmap_single(sc->dev, bf->bf_dmacontext, skb->len, DMA_TO_DEVICE);
1916 if (bf->bf_state.bfs_paprd) {
1917 if (time_after(jiffies,
1918 bf->bf_state.bfs_paprd_timestamp +
1919 msecs_to_jiffies(ATH_PAPRD_TIMEOUT)))
1920 dev_kfree_skb_any(skb);
1922 complete(&sc->paprd_complete);
1924 ath_tx_complete(sc, skb, bf->aphy, tx_flags);
1925 ath_debug_stat_tx(sc, txq, bf, ts);
1929 * Return the list of ath_buf of this mpdu to free queue
1931 spin_lock_irqsave(&sc->tx.txbuflock, flags);
1932 list_splice_tail_init(bf_q, &sc->tx.txbuf);
1933 spin_unlock_irqrestore(&sc->tx.txbuflock, flags);
1936 static int ath_tx_num_badfrms(struct ath_softc *sc, struct ath_buf *bf,
1937 struct ath_tx_status *ts, int txok)
1940 u32 ba[WME_BA_BMP_SIZE >> 5];
1945 if (bf->bf_lastbf->bf_tx_aborted)
1948 isaggr = bf_isaggr(bf);
1950 seq_st = ts->ts_seqnum;
1951 memcpy(ba, &ts->ba_low, WME_BA_BMP_SIZE >> 3);
1955 ba_index = ATH_BA_INDEX(seq_st, bf->bf_seqno);
1956 if (!txok || (isaggr && !ATH_BA_ISSET(ba, ba_index)))
1965 static void ath_tx_rc_status(struct ath_buf *bf, struct ath_tx_status *ts,
1966 int nbad, int txok, bool update_rc)
1968 struct sk_buff *skb = bf->bf_mpdu;
1969 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1970 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
1971 struct ieee80211_hw *hw = bf->aphy->hw;
1975 tx_info->status.ack_signal = ts->ts_rssi;
1977 tx_rateindex = ts->ts_rateindex;
1978 WARN_ON(tx_rateindex >= hw->max_rates);
1980 if (ts->ts_status & ATH9K_TXERR_FILT)
1981 tx_info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1982 if ((tx_info->flags & IEEE80211_TX_CTL_AMPDU) && update_rc)
1983 tx_info->flags |= IEEE80211_TX_STAT_AMPDU;
1985 if ((ts->ts_status & ATH9K_TXERR_FILT) == 0 &&
1986 (bf->bf_flags & ATH9K_TXDESC_NOACK) == 0 && update_rc) {
1987 if (ieee80211_is_data(hdr->frame_control)) {
1989 (ATH9K_TX_DATA_UNDERRUN | ATH9K_TX_DELIM_UNDERRUN))
1990 tx_info->pad[0] |= ATH_TX_INFO_UNDERRUN;
1991 if ((ts->ts_status & ATH9K_TXERR_XRETRY) ||
1992 (ts->ts_status & ATH9K_TXERR_FIFO))
1993 tx_info->pad[0] |= ATH_TX_INFO_XRETRY;
1994 tx_info->status.ampdu_len = bf->bf_nframes;
1995 tx_info->status.ampdu_ack_len = bf->bf_nframes - nbad;
1999 for (i = tx_rateindex + 1; i < hw->max_rates; i++) {
2000 tx_info->status.rates[i].count = 0;
2001 tx_info->status.rates[i].idx = -1;
2004 tx_info->status.rates[tx_rateindex].count = ts->ts_longretry + 1;
2007 static void ath_wake_mac80211_queue(struct ath_softc *sc, struct ath_txq *txq)
2011 qnum = ath_get_mac80211_qnum(txq->axq_class, sc);
2015 spin_lock_bh(&txq->axq_lock);
2016 if (txq->stopped && sc->tx.pending_frames[qnum] < ATH_MAX_QDEPTH) {
2017 if (ath_mac80211_start_queue(sc, qnum))
2020 spin_unlock_bh(&txq->axq_lock);
2023 static void ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq)
2025 struct ath_hw *ah = sc->sc_ah;
2026 struct ath_common *common = ath9k_hw_common(ah);
2027 struct ath_buf *bf, *lastbf, *bf_held = NULL;
2028 struct list_head bf_head;
2029 struct ath_desc *ds;
2030 struct ath_tx_status ts;
2034 ath_print(common, ATH_DBG_QUEUE, "tx queue %d (%x), link %p\n",
2035 txq->axq_qnum, ath9k_hw_gettxbuf(sc->sc_ah, txq->axq_qnum),
2039 spin_lock_bh(&txq->axq_lock);
2040 if (list_empty(&txq->axq_q)) {
2041 txq->axq_link = NULL;
2042 spin_unlock_bh(&txq->axq_lock);
2045 bf = list_first_entry(&txq->axq_q, struct ath_buf, list);
2048 * There is a race condition that a BH gets scheduled
2049 * after sw writes TxE and before hw re-load the last
2050 * descriptor to get the newly chained one.
2051 * Software must keep the last DONE descriptor as a
2052 * holding descriptor - software does so by marking
2053 * it with the STALE flag.
2058 if (list_is_last(&bf_held->list, &txq->axq_q)) {
2059 spin_unlock_bh(&txq->axq_lock);
2062 bf = list_entry(bf_held->list.next,
2063 struct ath_buf, list);
2067 lastbf = bf->bf_lastbf;
2068 ds = lastbf->bf_desc;
2070 memset(&ts, 0, sizeof(ts));
2071 status = ath9k_hw_txprocdesc(ah, ds, &ts);
2072 if (status == -EINPROGRESS) {
2073 spin_unlock_bh(&txq->axq_lock);
2078 * Remove ath_buf's of the same transmit unit from txq,
2079 * however leave the last descriptor back as the holding
2080 * descriptor for hw.
2082 lastbf->bf_stale = true;
2083 INIT_LIST_HEAD(&bf_head);
2084 if (!list_is_singular(&lastbf->list))
2085 list_cut_position(&bf_head,
2086 &txq->axq_q, lastbf->list.prev);
2089 txok = !(ts.ts_status & ATH9K_TXERR_MASK);
2090 txq->axq_tx_inprogress = false;
2092 list_del(&bf_held->list);
2093 spin_unlock_bh(&txq->axq_lock);
2096 ath_tx_return_buffer(sc, bf_held);
2098 if (!bf_isampdu(bf)) {
2100 * This frame is sent out as a single frame.
2101 * Use hardware retry status for this frame.
2103 if (ts.ts_status & ATH9K_TXERR_XRETRY)
2104 bf->bf_state.bf_type |= BUF_XRETRY;
2105 ath_tx_rc_status(bf, &ts, 0, txok, true);
2109 ath_tx_complete_aggr(sc, txq, bf, &bf_head, &ts, txok);
2111 ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, txok, 0);
2113 ath_wake_mac80211_queue(sc, txq);
2115 spin_lock_bh(&txq->axq_lock);
2116 if (sc->sc_flags & SC_OP_TXAGGR)
2117 ath_txq_schedule(sc, txq);
2118 spin_unlock_bh(&txq->axq_lock);
2122 static void ath_tx_complete_poll_work(struct work_struct *work)
2124 struct ath_softc *sc = container_of(work, struct ath_softc,
2125 tx_complete_work.work);
2126 struct ath_txq *txq;
2128 bool needreset = false;
2130 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++)
2131 if (ATH_TXQ_SETUP(sc, i)) {
2132 txq = &sc->tx.txq[i];
2133 spin_lock_bh(&txq->axq_lock);
2134 if (txq->axq_depth) {
2135 if (txq->axq_tx_inprogress) {
2137 spin_unlock_bh(&txq->axq_lock);
2140 txq->axq_tx_inprogress = true;
2143 spin_unlock_bh(&txq->axq_lock);
2147 ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_RESET,
2148 "tx hung, resetting the chip\n");
2149 ath9k_ps_wakeup(sc);
2150 ath_reset(sc, false);
2151 ath9k_ps_restore(sc);
2154 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work,
2155 msecs_to_jiffies(ATH_TX_COMPLETE_POLL_INT));
2160 void ath_tx_tasklet(struct ath_softc *sc)
2163 u32 qcumask = ((1 << ATH9K_NUM_TX_QUEUES) - 1);
2165 ath9k_hw_gettxintrtxqs(sc->sc_ah, &qcumask);
2167 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
2168 if (ATH_TXQ_SETUP(sc, i) && (qcumask & (1 << i)))
2169 ath_tx_processq(sc, &sc->tx.txq[i]);
2173 void ath_tx_edma_tasklet(struct ath_softc *sc)
2175 struct ath_tx_status txs;
2176 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2177 struct ath_hw *ah = sc->sc_ah;
2178 struct ath_txq *txq;
2179 struct ath_buf *bf, *lastbf;
2180 struct list_head bf_head;
2185 status = ath9k_hw_txprocdesc(ah, NULL, (void *)&txs);
2186 if (status == -EINPROGRESS)
2188 if (status == -EIO) {
2189 ath_print(common, ATH_DBG_XMIT,
2190 "Error processing tx status\n");
2194 /* Skip beacon completions */
2195 if (txs.qid == sc->beacon.beaconq)
2198 txq = &sc->tx.txq[txs.qid];
2200 spin_lock_bh(&txq->axq_lock);
2201 if (list_empty(&txq->txq_fifo[txq->txq_tailidx])) {
2202 spin_unlock_bh(&txq->axq_lock);
2206 bf = list_first_entry(&txq->txq_fifo[txq->txq_tailidx],
2207 struct ath_buf, list);
2208 lastbf = bf->bf_lastbf;
2210 INIT_LIST_HEAD(&bf_head);
2211 list_cut_position(&bf_head, &txq->txq_fifo[txq->txq_tailidx],
2213 INCR(txq->txq_tailidx, ATH_TXFIFO_DEPTH);
2215 txq->axq_tx_inprogress = false;
2216 spin_unlock_bh(&txq->axq_lock);
2218 txok = !(txs.ts_status & ATH9K_TXERR_MASK);
2220 if (!bf_isampdu(bf)) {
2221 if (txs.ts_status & ATH9K_TXERR_XRETRY)
2222 bf->bf_state.bf_type |= BUF_XRETRY;
2223 ath_tx_rc_status(bf, &txs, 0, txok, true);
2227 ath_tx_complete_aggr(sc, txq, bf, &bf_head, &txs, txok);
2229 ath_tx_complete_buf(sc, bf, txq, &bf_head,
2232 ath_wake_mac80211_queue(sc, txq);
2234 spin_lock_bh(&txq->axq_lock);
2235 if (!list_empty(&txq->txq_fifo_pending)) {
2236 INIT_LIST_HEAD(&bf_head);
2237 bf = list_first_entry(&txq->txq_fifo_pending,
2238 struct ath_buf, list);
2239 list_cut_position(&bf_head, &txq->txq_fifo_pending,
2240 &bf->bf_lastbf->list);
2241 ath_tx_txqaddbuf(sc, txq, &bf_head);
2242 } else if (sc->sc_flags & SC_OP_TXAGGR)
2243 ath_txq_schedule(sc, txq);
2244 spin_unlock_bh(&txq->axq_lock);
2252 static int ath_txstatus_setup(struct ath_softc *sc, int size)
2254 struct ath_descdma *dd = &sc->txsdma;
2255 u8 txs_len = sc->sc_ah->caps.txs_len;
2257 dd->dd_desc_len = size * txs_len;
2258 dd->dd_desc = dma_alloc_coherent(sc->dev, dd->dd_desc_len,
2259 &dd->dd_desc_paddr, GFP_KERNEL);
2266 static int ath_tx_edma_init(struct ath_softc *sc)
2270 err = ath_txstatus_setup(sc, ATH_TXSTATUS_RING_SIZE);
2272 ath9k_hw_setup_statusring(sc->sc_ah, sc->txsdma.dd_desc,
2273 sc->txsdma.dd_desc_paddr,
2274 ATH_TXSTATUS_RING_SIZE);
2279 static void ath_tx_edma_cleanup(struct ath_softc *sc)
2281 struct ath_descdma *dd = &sc->txsdma;
2283 dma_free_coherent(sc->dev, dd->dd_desc_len, dd->dd_desc,
2287 int ath_tx_init(struct ath_softc *sc, int nbufs)
2289 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2292 spin_lock_init(&sc->tx.txbuflock);
2294 error = ath_descdma_setup(sc, &sc->tx.txdma, &sc->tx.txbuf,
2297 ath_print(common, ATH_DBG_FATAL,
2298 "Failed to allocate tx descriptors: %d\n", error);
2302 error = ath_descdma_setup(sc, &sc->beacon.bdma, &sc->beacon.bbuf,
2303 "beacon", ATH_BCBUF, 1, 1);
2305 ath_print(common, ATH_DBG_FATAL,
2306 "Failed to allocate beacon descriptors: %d\n", error);
2310 INIT_DELAYED_WORK(&sc->tx_complete_work, ath_tx_complete_poll_work);
2312 if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
2313 error = ath_tx_edma_init(sc);
2325 void ath_tx_cleanup(struct ath_softc *sc)
2327 if (sc->beacon.bdma.dd_desc_len != 0)
2328 ath_descdma_cleanup(sc, &sc->beacon.bdma, &sc->beacon.bbuf);
2330 if (sc->tx.txdma.dd_desc_len != 0)
2331 ath_descdma_cleanup(sc, &sc->tx.txdma, &sc->tx.txbuf);
2333 if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
2334 ath_tx_edma_cleanup(sc);
2337 void ath_tx_node_init(struct ath_softc *sc, struct ath_node *an)
2339 struct ath_atx_tid *tid;
2340 struct ath_atx_ac *ac;
2343 for (tidno = 0, tid = &an->tid[tidno];
2344 tidno < WME_NUM_TID;
2348 tid->seq_start = tid->seq_next = 0;
2349 tid->baw_size = WME_MAX_BA;
2350 tid->baw_head = tid->baw_tail = 0;
2352 tid->paused = false;
2353 tid->state &= ~AGGR_CLEANUP;
2354 INIT_LIST_HEAD(&tid->buf_q);
2355 acno = TID_TO_WME_AC(tidno);
2356 tid->ac = &an->ac[acno];
2357 tid->state &= ~AGGR_ADDBA_COMPLETE;
2358 tid->state &= ~AGGR_ADDBA_PROGRESS;
2361 for (acno = 0, ac = &an->ac[acno];
2362 acno < WME_NUM_AC; acno++, ac++) {
2364 ac->qnum = sc->tx.hwq_map[acno];
2365 INIT_LIST_HEAD(&ac->tid_q);
2369 void ath_tx_node_cleanup(struct ath_softc *sc, struct ath_node *an)
2371 struct ath_atx_ac *ac;
2372 struct ath_atx_tid *tid;
2373 struct ath_txq *txq;
2376 for (tidno = 0, tid = &an->tid[tidno];
2377 tidno < WME_NUM_TID; tidno++, tid++) {
2380 if (!ATH_TXQ_SETUP(sc, i))
2383 txq = &sc->tx.txq[i];
2386 spin_lock_bh(&txq->axq_lock);
2389 list_del(&tid->list);
2394 list_del(&ac->list);
2395 tid->ac->sched = false;
2398 ath_tid_drain(sc, txq, tid);
2399 tid->state &= ~AGGR_ADDBA_COMPLETE;
2400 tid->state &= ~AGGR_CLEANUP;
2402 spin_unlock_bh(&txq->axq_lock);