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
);
72 static int ath_max_4ms_framelen
[4][32] = {
74 3212, 6432, 9648, 12864, 19300, 25736, 28952, 32172,
75 6424, 12852, 19280, 25708, 38568, 51424, 57852, 64280,
76 9628, 19260, 28896, 38528, 57792, 65532, 65532, 65532,
77 12828, 25656, 38488, 51320, 65532, 65532, 65532, 65532,
80 3572, 7144, 10720, 14296, 21444, 28596, 32172, 35744,
81 7140, 14284, 21428, 28568, 42856, 57144, 64288, 65532,
82 10700, 21408, 32112, 42816, 64228, 65532, 65532, 65532,
83 14256, 28516, 42780, 57040, 65532, 65532, 65532, 65532,
86 6680, 13360, 20044, 26724, 40092, 53456, 60140, 65532,
87 13348, 26700, 40052, 53400, 65532, 65532, 65532, 65532,
88 20004, 40008, 60016, 65532, 65532, 65532, 65532, 65532,
89 26644, 53292, 65532, 65532, 65532, 65532, 65532, 65532,
92 7420, 14844, 22272, 29696, 44544, 59396, 65532, 65532,
93 14832, 29668, 44504, 59340, 65532, 65532, 65532, 65532,
94 22232, 44464, 65532, 65532, 65532, 65532, 65532, 65532,
95 29616, 59232, 65532, 65532, 65532, 65532, 65532, 65532,
99 /*********************/
100 /* Aggregation logic */
101 /*********************/
103 static void ath_tx_queue_tid(struct ath_txq
*txq
, struct ath_atx_tid
*tid
)
105 struct ath_atx_ac
*ac
= tid
->ac
;
114 list_add_tail(&tid
->list
, &ac
->tid_q
);
120 list_add_tail(&ac
->list
, &txq
->axq_acq
);
123 static void ath_tx_pause_tid(struct ath_softc
*sc
, struct ath_atx_tid
*tid
)
125 struct ath_txq
*txq
= &sc
->tx
.txq
[tid
->ac
->qnum
];
127 spin_lock_bh(&txq
->axq_lock
);
129 spin_unlock_bh(&txq
->axq_lock
);
132 static void ath_tx_resume_tid(struct ath_softc
*sc
, struct ath_atx_tid
*tid
)
134 struct ath_txq
*txq
= &sc
->tx
.txq
[tid
->ac
->qnum
];
136 BUG_ON(tid
->paused
<= 0);
137 spin_lock_bh(&txq
->axq_lock
);
144 if (list_empty(&tid
->buf_q
))
147 ath_tx_queue_tid(txq
, tid
);
148 ath_txq_schedule(sc
, txq
);
150 spin_unlock_bh(&txq
->axq_lock
);
153 static void ath_tx_flush_tid(struct ath_softc
*sc
, struct ath_atx_tid
*tid
)
155 struct ath_txq
*txq
= &sc
->tx
.txq
[tid
->ac
->qnum
];
157 struct list_head bf_head
;
158 INIT_LIST_HEAD(&bf_head
);
160 BUG_ON(tid
->paused
<= 0);
161 spin_lock_bh(&txq
->axq_lock
);
165 if (tid
->paused
> 0) {
166 spin_unlock_bh(&txq
->axq_lock
);
170 while (!list_empty(&tid
->buf_q
)) {
171 bf
= list_first_entry(&tid
->buf_q
, struct ath_buf
, list
);
172 BUG_ON(bf_isretried(bf
));
173 list_move_tail(&bf
->list
, &bf_head
);
174 ath_tx_send_ht_normal(sc
, txq
, tid
, &bf_head
);
177 spin_unlock_bh(&txq
->axq_lock
);
180 static void ath_tx_update_baw(struct ath_softc
*sc
, struct ath_atx_tid
*tid
,
185 index
= ATH_BA_INDEX(tid
->seq_start
, seqno
);
186 cindex
= (tid
->baw_head
+ index
) & (ATH_TID_MAX_BUFS
- 1);
188 tid
->tx_buf
[cindex
] = NULL
;
190 while (tid
->baw_head
!= tid
->baw_tail
&& !tid
->tx_buf
[tid
->baw_head
]) {
191 INCR(tid
->seq_start
, IEEE80211_SEQ_MAX
);
192 INCR(tid
->baw_head
, ATH_TID_MAX_BUFS
);
196 static void ath_tx_addto_baw(struct ath_softc
*sc
, struct ath_atx_tid
*tid
,
201 if (bf_isretried(bf
))
204 index
= ATH_BA_INDEX(tid
->seq_start
, bf
->bf_seqno
);
205 cindex
= (tid
->baw_head
+ index
) & (ATH_TID_MAX_BUFS
- 1);
207 BUG_ON(tid
->tx_buf
[cindex
] != NULL
);
208 tid
->tx_buf
[cindex
] = bf
;
210 if (index
>= ((tid
->baw_tail
- tid
->baw_head
) &
211 (ATH_TID_MAX_BUFS
- 1))) {
212 tid
->baw_tail
= cindex
;
213 INCR(tid
->baw_tail
, ATH_TID_MAX_BUFS
);
218 * TODO: For frame(s) that are in the retry state, we will reuse the
219 * sequence number(s) without setting the retry bit. The
220 * alternative is to give up on these and BAR the receiver's window
223 static void ath_tid_drain(struct ath_softc
*sc
, struct ath_txq
*txq
,
224 struct ath_atx_tid
*tid
)
228 struct list_head bf_head
;
229 struct ath_tx_status ts
;
231 memset(&ts
, 0, sizeof(ts
));
232 INIT_LIST_HEAD(&bf_head
);
235 if (list_empty(&tid
->buf_q
))
238 bf
= list_first_entry(&tid
->buf_q
, struct ath_buf
, list
);
239 list_move_tail(&bf
->list
, &bf_head
);
241 if (bf_isretried(bf
))
242 ath_tx_update_baw(sc
, tid
, bf
->bf_seqno
);
244 spin_unlock(&txq
->axq_lock
);
245 ath_tx_complete_buf(sc
, bf
, txq
, &bf_head
, &ts
, 0, 0);
246 spin_lock(&txq
->axq_lock
);
249 tid
->seq_next
= tid
->seq_start
;
250 tid
->baw_tail
= tid
->baw_head
;
253 static void ath_tx_set_retry(struct ath_softc
*sc
, struct ath_txq
*txq
,
257 struct ieee80211_hdr
*hdr
;
259 bf
->bf_state
.bf_type
|= BUF_RETRY
;
261 TX_STAT_INC(txq
->axq_qnum
, a_retries
);
264 hdr
= (struct ieee80211_hdr
*)skb
->data
;
265 hdr
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_RETRY
);
268 static struct ath_buf
*ath_tx_get_buffer(struct ath_softc
*sc
)
270 struct ath_buf
*bf
= NULL
;
272 spin_lock_bh(&sc
->tx
.txbuflock
);
274 if (unlikely(list_empty(&sc
->tx
.txbuf
))) {
275 spin_unlock_bh(&sc
->tx
.txbuflock
);
279 bf
= list_first_entry(&sc
->tx
.txbuf
, struct ath_buf
, list
);
282 spin_unlock_bh(&sc
->tx
.txbuflock
);
287 static void ath_tx_return_buffer(struct ath_softc
*sc
, struct ath_buf
*bf
)
289 spin_lock_bh(&sc
->tx
.txbuflock
);
290 list_add_tail(&bf
->list
, &sc
->tx
.txbuf
);
291 spin_unlock_bh(&sc
->tx
.txbuflock
);
294 static struct ath_buf
* ath_clone_txbuf(struct ath_softc
*sc
, struct ath_buf
*bf
)
298 tbf
= ath_tx_get_buffer(sc
);
302 ATH_TXBUF_RESET(tbf
);
304 tbf
->aphy
= bf
->aphy
;
305 tbf
->bf_mpdu
= bf
->bf_mpdu
;
306 tbf
->bf_buf_addr
= bf
->bf_buf_addr
;
307 memcpy(tbf
->bf_desc
, bf
->bf_desc
, sc
->sc_ah
->caps
.tx_desc_len
);
308 tbf
->bf_state
= bf
->bf_state
;
309 tbf
->bf_dmacontext
= bf
->bf_dmacontext
;
314 static void ath_tx_complete_aggr(struct ath_softc
*sc
, struct ath_txq
*txq
,
315 struct ath_buf
*bf
, struct list_head
*bf_q
,
316 struct ath_tx_status
*ts
, int txok
)
318 struct ath_node
*an
= NULL
;
320 struct ieee80211_sta
*sta
;
321 struct ieee80211_hw
*hw
;
322 struct ieee80211_hdr
*hdr
;
323 struct ieee80211_tx_info
*tx_info
;
324 struct ath_atx_tid
*tid
= NULL
;
325 struct ath_buf
*bf_next
, *bf_last
= bf
->bf_lastbf
;
326 struct list_head bf_head
, bf_pending
;
327 u16 seq_st
= 0, acked_cnt
= 0, txfail_cnt
= 0;
328 u32 ba
[WME_BA_BMP_SIZE
>> 5];
329 int isaggr
, txfail
, txpending
, sendbar
= 0, needreset
= 0, nbad
= 0;
330 bool rc_update
= true;
333 hdr
= (struct ieee80211_hdr
*)skb
->data
;
335 tx_info
= IEEE80211_SKB_CB(skb
);
340 /* XXX: use ieee80211_find_sta! */
341 sta
= ieee80211_find_sta_by_hw(hw
, hdr
->addr1
);
347 an
= (struct ath_node
*)sta
->drv_priv
;
348 tid
= ATH_AN_2_TID(an
, bf
->bf_tidno
);
350 isaggr
= bf_isaggr(bf
);
351 memset(ba
, 0, WME_BA_BMP_SIZE
>> 3);
353 if (isaggr
&& txok
) {
354 if (ts
->ts_flags
& ATH9K_TX_BA
) {
355 seq_st
= ts
->ts_seqnum
;
356 memcpy(ba
, &ts
->ba_low
, WME_BA_BMP_SIZE
>> 3);
359 * AR5416 can become deaf/mute when BA
360 * issue happens. Chip needs to be reset.
361 * But AP code may have sychronization issues
362 * when perform internal reset in this routine.
363 * Only enable reset in STA mode for now.
365 if (sc
->sc_ah
->opmode
== NL80211_IFTYPE_STATION
)
370 INIT_LIST_HEAD(&bf_pending
);
371 INIT_LIST_HEAD(&bf_head
);
373 nbad
= ath_tx_num_badfrms(sc
, bf
, ts
, txok
);
375 txfail
= txpending
= 0;
376 bf_next
= bf
->bf_next
;
378 if (ATH_BA_ISSET(ba
, ATH_BA_INDEX(seq_st
, bf
->bf_seqno
))) {
379 /* transmit completion, subframe is
380 * acked by block ack */
382 } else if (!isaggr
&& txok
) {
383 /* transmit completion */
386 if (!(tid
->state
& AGGR_CLEANUP
) &&
387 !bf_last
->bf_tx_aborted
) {
388 if (bf
->bf_retries
< ATH_MAX_SW_RETRIES
) {
389 ath_tx_set_retry(sc
, txq
, bf
);
392 bf
->bf_state
.bf_type
|= BUF_XRETRY
;
399 * cleanup in progress, just fail
400 * the un-acked sub-frames
406 if (!(sc
->sc_ah
->caps
.hw_caps
& ATH9K_HW_CAP_EDMA
) &&
409 * Make sure the last desc is reclaimed if it
410 * not a holding desc.
412 if (!bf_last
->bf_stale
)
413 list_move_tail(&bf
->list
, &bf_head
);
415 INIT_LIST_HEAD(&bf_head
);
417 BUG_ON(list_empty(bf_q
));
418 list_move_tail(&bf
->list
, &bf_head
);
423 * complete the acked-ones/xretried ones; update
426 spin_lock_bh(&txq
->axq_lock
);
427 ath_tx_update_baw(sc
, tid
, bf
->bf_seqno
);
428 spin_unlock_bh(&txq
->axq_lock
);
430 if (rc_update
&& (acked_cnt
== 1 || txfail_cnt
== 1)) {
431 ath_tx_rc_status(bf
, ts
, nbad
, txok
, true);
434 ath_tx_rc_status(bf
, ts
, nbad
, txok
, false);
437 ath_tx_complete_buf(sc
, bf
, txq
, &bf_head
, ts
,
440 /* retry the un-acked ones */
441 if (!(sc
->sc_ah
->caps
.hw_caps
& ATH9K_HW_CAP_EDMA
)) {
442 if (bf
->bf_next
== NULL
&& bf_last
->bf_stale
) {
445 tbf
= ath_clone_txbuf(sc
, bf_last
);
447 * Update tx baw and complete the
448 * frame with failed status if we
452 spin_lock_bh(&txq
->axq_lock
);
453 ath_tx_update_baw(sc
, tid
,
455 spin_unlock_bh(&txq
->axq_lock
);
457 bf
->bf_state
.bf_type
|=
459 ath_tx_rc_status(bf
, ts
, nbad
,
461 ath_tx_complete_buf(sc
, bf
, txq
,
467 ath9k_hw_cleartxdesc(sc
->sc_ah
,
469 list_add_tail(&tbf
->list
, &bf_head
);
472 * Clear descriptor status words for
475 ath9k_hw_cleartxdesc(sc
->sc_ah
,
481 * Put this buffer to the temporary pending
482 * queue to retain ordering
484 list_splice_tail_init(&bf_head
, &bf_pending
);
490 if (tid
->state
& AGGR_CLEANUP
) {
491 if (tid
->baw_head
== tid
->baw_tail
) {
492 tid
->state
&= ~AGGR_ADDBA_COMPLETE
;
493 tid
->state
&= ~AGGR_CLEANUP
;
495 /* send buffered frames as singles */
496 ath_tx_flush_tid(sc
, tid
);
502 /* prepend un-acked frames to the beginning of the pending frame queue */
503 if (!list_empty(&bf_pending
)) {
504 spin_lock_bh(&txq
->axq_lock
);
505 list_splice(&bf_pending
, &tid
->buf_q
);
506 ath_tx_queue_tid(txq
, tid
);
507 spin_unlock_bh(&txq
->axq_lock
);
513 ath_reset(sc
, false);
516 static u32
ath_lookup_rate(struct ath_softc
*sc
, struct ath_buf
*bf
,
517 struct ath_atx_tid
*tid
)
520 struct ieee80211_tx_info
*tx_info
;
521 struct ieee80211_tx_rate
*rates
;
522 u32 max_4ms_framelen
, frmlen
;
523 u16 aggr_limit
, legacy
= 0;
527 tx_info
= IEEE80211_SKB_CB(skb
);
528 rates
= tx_info
->control
.rates
;
531 * Find the lowest frame length among the rate series that will have a
532 * 4ms transmit duration.
533 * TODO - TXOP limit needs to be considered.
535 max_4ms_framelen
= ATH_AMPDU_LIMIT_MAX
;
537 for (i
= 0; i
< 4; i
++) {
538 if (rates
[i
].count
) {
540 if (!(rates
[i
].flags
& IEEE80211_TX_RC_MCS
)) {
545 if (rates
[i
].flags
& IEEE80211_TX_RC_40_MHZ_WIDTH
)
550 if (rates
[i
].flags
& IEEE80211_TX_RC_SHORT_GI
)
553 frmlen
= ath_max_4ms_framelen
[modeidx
][rates
[i
].idx
];
554 max_4ms_framelen
= min(max_4ms_framelen
, frmlen
);
559 * limit aggregate size by the minimum rate if rate selected is
560 * not a probe rate, if rate selected is a probe rate then
561 * avoid aggregation of this packet.
563 if (tx_info
->flags
& IEEE80211_TX_CTL_RATE_CTRL_PROBE
|| legacy
)
566 if (sc
->sc_flags
& SC_OP_BT_PRIORITY_DETECTED
)
567 aggr_limit
= min((max_4ms_framelen
* 3) / 8,
568 (u32
)ATH_AMPDU_LIMIT_MAX
);
570 aggr_limit
= min(max_4ms_framelen
,
571 (u32
)ATH_AMPDU_LIMIT_MAX
);
574 * h/w can accept aggregates upto 16 bit lengths (65535).
575 * The IE, however can hold upto 65536, which shows up here
576 * as zero. Ignore 65536 since we are constrained by hw.
578 if (tid
->an
->maxampdu
)
579 aggr_limit
= min(aggr_limit
, tid
->an
->maxampdu
);
585 * Returns the number of delimiters to be added to
586 * meet the minimum required mpdudensity.
588 static int ath_compute_num_delims(struct ath_softc
*sc
, struct ath_atx_tid
*tid
,
589 struct ath_buf
*bf
, u16 frmlen
)
591 struct sk_buff
*skb
= bf
->bf_mpdu
;
592 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(skb
);
593 u32 nsymbits
, nsymbols
;
596 int width
, streams
, half_gi
, ndelim
, mindelim
;
598 /* Select standard number of delimiters based on frame length alone */
599 ndelim
= ATH_AGGR_GET_NDELIM(frmlen
);
602 * If encryption enabled, hardware requires some more padding between
604 * TODO - this could be improved to be dependent on the rate.
605 * The hardware can keep up at lower rates, but not higher rates
607 if (bf
->bf_keytype
!= ATH9K_KEY_TYPE_CLEAR
)
608 ndelim
+= ATH_AGGR_ENCRYPTDELIM
;
611 * Convert desired mpdu density from microeconds to bytes based
612 * on highest rate in rate series (i.e. first rate) to determine
613 * required minimum length for subframe. Take into account
614 * whether high rate is 20 or 40Mhz and half or full GI.
616 * If there is no mpdu density restriction, no further calculation
620 if (tid
->an
->mpdudensity
== 0)
623 rix
= tx_info
->control
.rates
[0].idx
;
624 flags
= tx_info
->control
.rates
[0].flags
;
625 width
= (flags
& IEEE80211_TX_RC_40_MHZ_WIDTH
) ? 1 : 0;
626 half_gi
= (flags
& IEEE80211_TX_RC_SHORT_GI
) ? 1 : 0;
629 nsymbols
= NUM_SYMBOLS_PER_USEC_HALFGI(tid
->an
->mpdudensity
);
631 nsymbols
= NUM_SYMBOLS_PER_USEC(tid
->an
->mpdudensity
);
636 streams
= HT_RC_2_STREAMS(rix
);
637 nsymbits
= bits_per_symbol
[rix
% 8][width
] * streams
;
638 minlen
= (nsymbols
* nsymbits
) / BITS_PER_BYTE
;
640 if (frmlen
< minlen
) {
641 mindelim
= (minlen
- frmlen
) / ATH_AGGR_DELIM_SZ
;
642 ndelim
= max(mindelim
, ndelim
);
648 static enum ATH_AGGR_STATUS
ath_tx_form_aggr(struct ath_softc
*sc
,
650 struct ath_atx_tid
*tid
,
651 struct list_head
*bf_q
)
653 #define PADBYTES(_len) ((4 - ((_len) % 4)) % 4)
654 struct ath_buf
*bf
, *bf_first
, *bf_prev
= NULL
;
655 int rl
= 0, nframes
= 0, ndelim
, prev_al
= 0;
656 u16 aggr_limit
= 0, al
= 0, bpad
= 0,
657 al_delta
, h_baw
= tid
->baw_size
/ 2;
658 enum ATH_AGGR_STATUS status
= ATH_AGGR_DONE
;
660 bf_first
= list_first_entry(&tid
->buf_q
, struct ath_buf
, list
);
663 bf
= list_first_entry(&tid
->buf_q
, struct ath_buf
, list
);
665 /* do not step over block-ack window */
666 if (!BAW_WITHIN(tid
->seq_start
, tid
->baw_size
, bf
->bf_seqno
)) {
667 status
= ATH_AGGR_BAW_CLOSED
;
672 aggr_limit
= ath_lookup_rate(sc
, bf
, tid
);
676 /* do not exceed aggregation limit */
677 al_delta
= ATH_AGGR_DELIM_SZ
+ bf
->bf_frmlen
;
680 (aggr_limit
< (al
+ bpad
+ al_delta
+ prev_al
))) {
681 status
= ATH_AGGR_LIMITED
;
685 /* do not exceed subframe limit */
686 if (nframes
>= min((int)h_baw
, ATH_AMPDU_SUBFRAME_DEFAULT
)) {
687 status
= ATH_AGGR_LIMITED
;
692 /* add padding for previous frame to aggregation length */
693 al
+= bpad
+ al_delta
;
696 * Get the delimiters needed to meet the MPDU
697 * density for this node.
699 ndelim
= ath_compute_num_delims(sc
, tid
, bf_first
, bf
->bf_frmlen
);
700 bpad
= PADBYTES(al_delta
) + (ndelim
<< 2);
703 ath9k_hw_set_desc_link(sc
->sc_ah
, bf
->bf_desc
, 0);
705 /* link buffers of this frame to the aggregate */
706 ath_tx_addto_baw(sc
, tid
, bf
);
707 ath9k_hw_set11n_aggr_middle(sc
->sc_ah
, bf
->bf_desc
, ndelim
);
708 list_move_tail(&bf
->list
, bf_q
);
710 bf_prev
->bf_next
= bf
;
711 ath9k_hw_set_desc_link(sc
->sc_ah
, bf_prev
->bf_desc
,
716 } while (!list_empty(&tid
->buf_q
));
718 bf_first
->bf_al
= al
;
719 bf_first
->bf_nframes
= nframes
;
725 static void ath_tx_sched_aggr(struct ath_softc
*sc
, struct ath_txq
*txq
,
726 struct ath_atx_tid
*tid
)
729 enum ATH_AGGR_STATUS status
;
730 struct list_head bf_q
;
733 if (list_empty(&tid
->buf_q
))
736 INIT_LIST_HEAD(&bf_q
);
738 status
= ath_tx_form_aggr(sc
, txq
, tid
, &bf_q
);
741 * no frames picked up to be aggregated;
742 * block-ack window is not open.
744 if (list_empty(&bf_q
))
747 bf
= list_first_entry(&bf_q
, struct ath_buf
, list
);
748 bf
->bf_lastbf
= list_entry(bf_q
.prev
, struct ath_buf
, list
);
750 /* if only one frame, send as non-aggregate */
751 if (bf
->bf_nframes
== 1) {
752 bf
->bf_state
.bf_type
&= ~BUF_AGGR
;
753 ath9k_hw_clr11n_aggr(sc
->sc_ah
, bf
->bf_desc
);
754 ath_buf_set_rate(sc
, bf
);
755 ath_tx_txqaddbuf(sc
, txq
, &bf_q
);
759 /* setup first desc of aggregate */
760 bf
->bf_state
.bf_type
|= BUF_AGGR
;
761 ath_buf_set_rate(sc
, bf
);
762 ath9k_hw_set11n_aggr_first(sc
->sc_ah
, bf
->bf_desc
, bf
->bf_al
);
764 /* anchor last desc of aggregate */
765 ath9k_hw_set11n_aggr_last(sc
->sc_ah
, bf
->bf_lastbf
->bf_desc
);
767 ath_tx_txqaddbuf(sc
, txq
, &bf_q
);
768 TX_STAT_INC(txq
->axq_qnum
, a_aggr
);
770 } while (txq
->axq_depth
< ATH_AGGR_MIN_QDEPTH
&&
771 status
!= ATH_AGGR_BAW_CLOSED
);
774 void ath_tx_aggr_start(struct ath_softc
*sc
, struct ieee80211_sta
*sta
,
777 struct ath_atx_tid
*txtid
;
780 an
= (struct ath_node
*)sta
->drv_priv
;
781 txtid
= ATH_AN_2_TID(an
, tid
);
782 txtid
->state
|= AGGR_ADDBA_PROGRESS
;
783 ath_tx_pause_tid(sc
, txtid
);
784 *ssn
= txtid
->seq_start
;
787 void ath_tx_aggr_stop(struct ath_softc
*sc
, struct ieee80211_sta
*sta
, u16 tid
)
789 struct ath_node
*an
= (struct ath_node
*)sta
->drv_priv
;
790 struct ath_atx_tid
*txtid
= ATH_AN_2_TID(an
, tid
);
791 struct ath_txq
*txq
= &sc
->tx
.txq
[txtid
->ac
->qnum
];
792 struct ath_tx_status ts
;
794 struct list_head bf_head
;
796 memset(&ts
, 0, sizeof(ts
));
797 INIT_LIST_HEAD(&bf_head
);
799 if (txtid
->state
& AGGR_CLEANUP
)
802 if (!(txtid
->state
& AGGR_ADDBA_COMPLETE
)) {
803 txtid
->state
&= ~AGGR_ADDBA_PROGRESS
;
807 ath_tx_pause_tid(sc
, txtid
);
809 /* drop all software retried frames and mark this TID */
810 spin_lock_bh(&txq
->axq_lock
);
811 while (!list_empty(&txtid
->buf_q
)) {
812 bf
= list_first_entry(&txtid
->buf_q
, struct ath_buf
, list
);
813 if (!bf_isretried(bf
)) {
815 * NB: it's based on the assumption that
816 * software retried frame will always stay
817 * at the head of software queue.
821 list_move_tail(&bf
->list
, &bf_head
);
822 ath_tx_update_baw(sc
, txtid
, bf
->bf_seqno
);
823 ath_tx_complete_buf(sc
, bf
, txq
, &bf_head
, &ts
, 0, 0);
825 spin_unlock_bh(&txq
->axq_lock
);
827 if (txtid
->baw_head
!= txtid
->baw_tail
) {
828 txtid
->state
|= AGGR_CLEANUP
;
830 txtid
->state
&= ~AGGR_ADDBA_COMPLETE
;
831 ath_tx_flush_tid(sc
, txtid
);
835 void ath_tx_aggr_resume(struct ath_softc
*sc
, struct ieee80211_sta
*sta
, u16 tid
)
837 struct ath_atx_tid
*txtid
;
840 an
= (struct ath_node
*)sta
->drv_priv
;
842 if (sc
->sc_flags
& SC_OP_TXAGGR
) {
843 txtid
= ATH_AN_2_TID(an
, tid
);
845 IEEE80211_MIN_AMPDU_BUF
<< sta
->ht_cap
.ampdu_factor
;
846 txtid
->state
|= AGGR_ADDBA_COMPLETE
;
847 txtid
->state
&= ~AGGR_ADDBA_PROGRESS
;
848 ath_tx_resume_tid(sc
, txtid
);
852 bool ath_tx_aggr_check(struct ath_softc
*sc
, struct ath_node
*an
, u8 tidno
)
854 struct ath_atx_tid
*txtid
;
856 if (!(sc
->sc_flags
& SC_OP_TXAGGR
))
859 txtid
= ATH_AN_2_TID(an
, tidno
);
861 if (!(txtid
->state
& (AGGR_ADDBA_COMPLETE
| AGGR_ADDBA_PROGRESS
)))
866 /********************/
867 /* Queue Management */
868 /********************/
870 static void ath_txq_drain_pending_buffers(struct ath_softc
*sc
,
873 struct ath_atx_ac
*ac
, *ac_tmp
;
874 struct ath_atx_tid
*tid
, *tid_tmp
;
876 list_for_each_entry_safe(ac
, ac_tmp
, &txq
->axq_acq
, list
) {
879 list_for_each_entry_safe(tid
, tid_tmp
, &ac
->tid_q
, list
) {
880 list_del(&tid
->list
);
882 ath_tid_drain(sc
, txq
, tid
);
887 struct ath_txq
*ath_txq_setup(struct ath_softc
*sc
, int qtype
, int subtype
)
889 struct ath_hw
*ah
= sc
->sc_ah
;
890 struct ath_common
*common
= ath9k_hw_common(ah
);
891 struct ath9k_tx_queue_info qi
;
894 memset(&qi
, 0, sizeof(qi
));
895 qi
.tqi_subtype
= subtype
;
896 qi
.tqi_aifs
= ATH9K_TXQ_USEDEFAULT
;
897 qi
.tqi_cwmin
= ATH9K_TXQ_USEDEFAULT
;
898 qi
.tqi_cwmax
= ATH9K_TXQ_USEDEFAULT
;
899 qi
.tqi_physCompBuf
= 0;
902 * Enable interrupts only for EOL and DESC conditions.
903 * We mark tx descriptors to receive a DESC interrupt
904 * when a tx queue gets deep; otherwise waiting for the
905 * EOL to reap descriptors. Note that this is done to
906 * reduce interrupt load and this only defers reaping
907 * descriptors, never transmitting frames. Aside from
908 * reducing interrupts this also permits more concurrency.
909 * The only potential downside is if the tx queue backs
910 * up in which case the top half of the kernel may backup
911 * due to a lack of tx descriptors.
913 * The UAPSD queue is an exception, since we take a desc-
914 * based intr on the EOSP frames.
916 if (ah
->caps
.hw_caps
& ATH9K_HW_CAP_EDMA
) {
917 qi
.tqi_qflags
= TXQ_FLAG_TXOKINT_ENABLE
|
918 TXQ_FLAG_TXERRINT_ENABLE
;
920 if (qtype
== ATH9K_TX_QUEUE_UAPSD
)
921 qi
.tqi_qflags
= TXQ_FLAG_TXDESCINT_ENABLE
;
923 qi
.tqi_qflags
= TXQ_FLAG_TXEOLINT_ENABLE
|
924 TXQ_FLAG_TXDESCINT_ENABLE
;
926 qnum
= ath9k_hw_setuptxqueue(ah
, qtype
, &qi
);
929 * NB: don't print a message, this happens
930 * normally on parts with too few tx queues
934 if (qnum
>= ARRAY_SIZE(sc
->tx
.txq
)) {
935 ath_print(common
, ATH_DBG_FATAL
,
936 "qnum %u out of range, max %u!\n",
937 qnum
, (unsigned int)ARRAY_SIZE(sc
->tx
.txq
));
938 ath9k_hw_releasetxqueue(ah
, qnum
);
941 if (!ATH_TXQ_SETUP(sc
, qnum
)) {
942 struct ath_txq
*txq
= &sc
->tx
.txq
[qnum
];
944 txq
->axq_qnum
= qnum
;
945 txq
->axq_link
= NULL
;
946 INIT_LIST_HEAD(&txq
->axq_q
);
947 INIT_LIST_HEAD(&txq
->axq_acq
);
948 spin_lock_init(&txq
->axq_lock
);
950 txq
->axq_tx_inprogress
= false;
951 sc
->tx
.txqsetup
|= 1<<qnum
;
953 txq
->txq_headidx
= txq
->txq_tailidx
= 0;
954 for (i
= 0; i
< ATH_TXFIFO_DEPTH
; i
++)
955 INIT_LIST_HEAD(&txq
->txq_fifo
[i
]);
956 INIT_LIST_HEAD(&txq
->txq_fifo_pending
);
958 return &sc
->tx
.txq
[qnum
];
961 int ath_tx_get_qnum(struct ath_softc
*sc
, int qtype
, int haltype
)
966 case ATH9K_TX_QUEUE_DATA
:
967 if (haltype
>= ARRAY_SIZE(sc
->tx
.hwq_map
)) {
968 ath_print(ath9k_hw_common(sc
->sc_ah
), ATH_DBG_FATAL
,
969 "HAL AC %u out of range, max %zu!\n",
970 haltype
, ARRAY_SIZE(sc
->tx
.hwq_map
));
973 qnum
= sc
->tx
.hwq_map
[haltype
];
975 case ATH9K_TX_QUEUE_BEACON
:
976 qnum
= sc
->beacon
.beaconq
;
978 case ATH9K_TX_QUEUE_CAB
:
979 qnum
= sc
->beacon
.cabq
->axq_qnum
;
987 int ath_txq_update(struct ath_softc
*sc
, int qnum
,
988 struct ath9k_tx_queue_info
*qinfo
)
990 struct ath_hw
*ah
= sc
->sc_ah
;
992 struct ath9k_tx_queue_info qi
;
994 if (qnum
== sc
->beacon
.beaconq
) {
996 * XXX: for beacon queue, we just save the parameter.
997 * It will be picked up by ath_beaconq_config when
1000 sc
->beacon
.beacon_qi
= *qinfo
;
1004 BUG_ON(sc
->tx
.txq
[qnum
].axq_qnum
!= qnum
);
1006 ath9k_hw_get_txq_props(ah
, qnum
, &qi
);
1007 qi
.tqi_aifs
= qinfo
->tqi_aifs
;
1008 qi
.tqi_cwmin
= qinfo
->tqi_cwmin
;
1009 qi
.tqi_cwmax
= qinfo
->tqi_cwmax
;
1010 qi
.tqi_burstTime
= qinfo
->tqi_burstTime
;
1011 qi
.tqi_readyTime
= qinfo
->tqi_readyTime
;
1013 if (!ath9k_hw_set_txq_props(ah
, qnum
, &qi
)) {
1014 ath_print(ath9k_hw_common(sc
->sc_ah
), ATH_DBG_FATAL
,
1015 "Unable to update hardware queue %u!\n", qnum
);
1018 ath9k_hw_resettxqueue(ah
, qnum
);
1024 int ath_cabq_update(struct ath_softc
*sc
)
1026 struct ath9k_tx_queue_info qi
;
1027 int qnum
= sc
->beacon
.cabq
->axq_qnum
;
1029 ath9k_hw_get_txq_props(sc
->sc_ah
, qnum
, &qi
);
1031 * Ensure the readytime % is within the bounds.
1033 if (sc
->config
.cabqReadytime
< ATH9K_READY_TIME_LO_BOUND
)
1034 sc
->config
.cabqReadytime
= ATH9K_READY_TIME_LO_BOUND
;
1035 else if (sc
->config
.cabqReadytime
> ATH9K_READY_TIME_HI_BOUND
)
1036 sc
->config
.cabqReadytime
= ATH9K_READY_TIME_HI_BOUND
;
1038 qi
.tqi_readyTime
= (sc
->beacon_interval
*
1039 sc
->config
.cabqReadytime
) / 100;
1040 ath_txq_update(sc
, qnum
, &qi
);
1046 * Drain a given TX queue (could be Beacon or Data)
1048 * This assumes output has been stopped and
1049 * we do not need to block ath_tx_tasklet.
1051 void ath_draintxq(struct ath_softc
*sc
, struct ath_txq
*txq
, bool retry_tx
)
1053 struct ath_buf
*bf
, *lastbf
;
1054 struct list_head bf_head
;
1055 struct ath_tx_status ts
;
1057 memset(&ts
, 0, sizeof(ts
));
1058 INIT_LIST_HEAD(&bf_head
);
1061 spin_lock_bh(&txq
->axq_lock
);
1063 if (sc
->sc_ah
->caps
.hw_caps
& ATH9K_HW_CAP_EDMA
) {
1064 if (list_empty(&txq
->txq_fifo
[txq
->txq_tailidx
])) {
1065 txq
->txq_headidx
= txq
->txq_tailidx
= 0;
1066 spin_unlock_bh(&txq
->axq_lock
);
1069 bf
= list_first_entry(&txq
->txq_fifo
[txq
->txq_tailidx
],
1070 struct ath_buf
, list
);
1073 if (list_empty(&txq
->axq_q
)) {
1074 txq
->axq_link
= NULL
;
1075 spin_unlock_bh(&txq
->axq_lock
);
1078 bf
= list_first_entry(&txq
->axq_q
, struct ath_buf
,
1082 list_del(&bf
->list
);
1083 spin_unlock_bh(&txq
->axq_lock
);
1085 ath_tx_return_buffer(sc
, bf
);
1090 lastbf
= bf
->bf_lastbf
;
1092 lastbf
->bf_tx_aborted
= true;
1094 if (sc
->sc_ah
->caps
.hw_caps
& ATH9K_HW_CAP_EDMA
) {
1095 list_cut_position(&bf_head
,
1096 &txq
->txq_fifo
[txq
->txq_tailidx
],
1098 INCR(txq
->txq_tailidx
, ATH_TXFIFO_DEPTH
);
1100 /* remove ath_buf's of the same mpdu from txq */
1101 list_cut_position(&bf_head
, &txq
->axq_q
, &lastbf
->list
);
1106 spin_unlock_bh(&txq
->axq_lock
);
1109 ath_tx_complete_aggr(sc
, txq
, bf
, &bf_head
, &ts
, 0);
1111 ath_tx_complete_buf(sc
, bf
, txq
, &bf_head
, &ts
, 0, 0);
1114 spin_lock_bh(&txq
->axq_lock
);
1115 txq
->axq_tx_inprogress
= false;
1116 spin_unlock_bh(&txq
->axq_lock
);
1118 /* flush any pending frames if aggregation is enabled */
1119 if (sc
->sc_flags
& SC_OP_TXAGGR
) {
1121 spin_lock_bh(&txq
->axq_lock
);
1122 ath_txq_drain_pending_buffers(sc
, txq
);
1123 spin_unlock_bh(&txq
->axq_lock
);
1127 if (sc
->sc_ah
->caps
.hw_caps
& ATH9K_HW_CAP_EDMA
) {
1128 spin_lock_bh(&txq
->axq_lock
);
1129 while (!list_empty(&txq
->txq_fifo_pending
)) {
1130 bf
= list_first_entry(&txq
->txq_fifo_pending
,
1131 struct ath_buf
, list
);
1132 list_cut_position(&bf_head
,
1133 &txq
->txq_fifo_pending
,
1134 &bf
->bf_lastbf
->list
);
1135 spin_unlock_bh(&txq
->axq_lock
);
1138 ath_tx_complete_aggr(sc
, txq
, bf
, &bf_head
,
1141 ath_tx_complete_buf(sc
, bf
, txq
, &bf_head
,
1143 spin_lock_bh(&txq
->axq_lock
);
1145 spin_unlock_bh(&txq
->axq_lock
);
1149 void ath_drain_all_txq(struct ath_softc
*sc
, bool retry_tx
)
1151 struct ath_hw
*ah
= sc
->sc_ah
;
1152 struct ath_common
*common
= ath9k_hw_common(sc
->sc_ah
);
1153 struct ath_txq
*txq
;
1156 if (sc
->sc_flags
& SC_OP_INVALID
)
1159 /* Stop beacon queue */
1160 ath9k_hw_stoptxdma(sc
->sc_ah
, sc
->beacon
.beaconq
);
1162 /* Stop data queues */
1163 for (i
= 0; i
< ATH9K_NUM_TX_QUEUES
; i
++) {
1164 if (ATH_TXQ_SETUP(sc
, i
)) {
1165 txq
= &sc
->tx
.txq
[i
];
1166 ath9k_hw_stoptxdma(ah
, txq
->axq_qnum
);
1167 npend
+= ath9k_hw_numtxpending(ah
, txq
->axq_qnum
);
1174 ath_print(common
, ATH_DBG_FATAL
,
1175 "Failed to stop TX DMA. Resetting hardware!\n");
1177 spin_lock_bh(&sc
->sc_resetlock
);
1178 r
= ath9k_hw_reset(ah
, sc
->sc_ah
->curchan
, false);
1180 ath_print(common
, ATH_DBG_FATAL
,
1181 "Unable to reset hardware; reset status %d\n",
1183 spin_unlock_bh(&sc
->sc_resetlock
);
1186 for (i
= 0; i
< ATH9K_NUM_TX_QUEUES
; i
++) {
1187 if (ATH_TXQ_SETUP(sc
, i
))
1188 ath_draintxq(sc
, &sc
->tx
.txq
[i
], retry_tx
);
1192 void ath_tx_cleanupq(struct ath_softc
*sc
, struct ath_txq
*txq
)
1194 ath9k_hw_releasetxqueue(sc
->sc_ah
, txq
->axq_qnum
);
1195 sc
->tx
.txqsetup
&= ~(1<<txq
->axq_qnum
);
1198 void ath_txq_schedule(struct ath_softc
*sc
, struct ath_txq
*txq
)
1200 struct ath_atx_ac
*ac
;
1201 struct ath_atx_tid
*tid
;
1203 if (list_empty(&txq
->axq_acq
))
1206 ac
= list_first_entry(&txq
->axq_acq
, struct ath_atx_ac
, list
);
1207 list_del(&ac
->list
);
1211 if (list_empty(&ac
->tid_q
))
1214 tid
= list_first_entry(&ac
->tid_q
, struct ath_atx_tid
, list
);
1215 list_del(&tid
->list
);
1221 ath_tx_sched_aggr(sc
, txq
, tid
);
1224 * add tid to round-robin queue if more frames
1225 * are pending for the tid
1227 if (!list_empty(&tid
->buf_q
))
1228 ath_tx_queue_tid(txq
, tid
);
1231 } while (!list_empty(&ac
->tid_q
));
1233 if (!list_empty(&ac
->tid_q
)) {
1236 list_add_tail(&ac
->list
, &txq
->axq_acq
);
1241 int ath_tx_setup(struct ath_softc
*sc
, int haltype
)
1243 struct ath_txq
*txq
;
1245 if (haltype
>= ARRAY_SIZE(sc
->tx
.hwq_map
)) {
1246 ath_print(ath9k_hw_common(sc
->sc_ah
), ATH_DBG_FATAL
,
1247 "HAL AC %u out of range, max %zu!\n",
1248 haltype
, ARRAY_SIZE(sc
->tx
.hwq_map
));
1251 txq
= ath_txq_setup(sc
, ATH9K_TX_QUEUE_DATA
, haltype
);
1253 sc
->tx
.hwq_map
[haltype
] = txq
->axq_qnum
;
1264 * Insert a chain of ath_buf (descriptors) on a txq and
1265 * assume the descriptors are already chained together by caller.
1267 static void ath_tx_txqaddbuf(struct ath_softc
*sc
, struct ath_txq
*txq
,
1268 struct list_head
*head
)
1270 struct ath_hw
*ah
= sc
->sc_ah
;
1271 struct ath_common
*common
= ath9k_hw_common(ah
);
1275 * Insert the frame on the outbound list and
1276 * pass it on to the hardware.
1279 if (list_empty(head
))
1282 bf
= list_first_entry(head
, struct ath_buf
, list
);
1284 ath_print(common
, ATH_DBG_QUEUE
,
1285 "qnum: %d, txq depth: %d\n", txq
->axq_qnum
, txq
->axq_depth
);
1287 if (sc
->sc_ah
->caps
.hw_caps
& ATH9K_HW_CAP_EDMA
) {
1288 if (txq
->axq_depth
>= ATH_TXFIFO_DEPTH
) {
1289 list_splice_tail_init(head
, &txq
->txq_fifo_pending
);
1292 if (!list_empty(&txq
->txq_fifo
[txq
->txq_headidx
]))
1293 ath_print(common
, ATH_DBG_XMIT
,
1294 "Initializing tx fifo %d which "
1297 INIT_LIST_HEAD(&txq
->txq_fifo
[txq
->txq_headidx
]);
1298 list_splice_init(head
, &txq
->txq_fifo
[txq
->txq_headidx
]);
1299 INCR(txq
->txq_headidx
, ATH_TXFIFO_DEPTH
);
1300 ath9k_hw_puttxbuf(ah
, txq
->axq_qnum
, bf
->bf_daddr
);
1301 ath_print(common
, ATH_DBG_XMIT
,
1302 "TXDP[%u] = %llx (%p)\n",
1303 txq
->axq_qnum
, ito64(bf
->bf_daddr
), bf
->bf_desc
);
1305 list_splice_tail_init(head
, &txq
->axq_q
);
1307 if (txq
->axq_link
== NULL
) {
1308 ath9k_hw_puttxbuf(ah
, txq
->axq_qnum
, bf
->bf_daddr
);
1309 ath_print(common
, ATH_DBG_XMIT
,
1310 "TXDP[%u] = %llx (%p)\n",
1311 txq
->axq_qnum
, ito64(bf
->bf_daddr
),
1314 *txq
->axq_link
= bf
->bf_daddr
;
1315 ath_print(common
, ATH_DBG_XMIT
,
1316 "link[%u] (%p)=%llx (%p)\n",
1317 txq
->axq_qnum
, txq
->axq_link
,
1318 ito64(bf
->bf_daddr
), bf
->bf_desc
);
1320 ath9k_hw_get_desc_link(ah
, bf
->bf_lastbf
->bf_desc
,
1322 ath9k_hw_txstart(ah
, txq
->axq_qnum
);
1327 static void ath_tx_send_ampdu(struct ath_softc
*sc
, struct ath_atx_tid
*tid
,
1328 struct list_head
*bf_head
,
1329 struct ath_tx_control
*txctl
)
1333 bf
= list_first_entry(bf_head
, struct ath_buf
, list
);
1334 bf
->bf_state
.bf_type
|= BUF_AMPDU
;
1335 TX_STAT_INC(txctl
->txq
->axq_qnum
, a_queued
);
1338 * Do not queue to h/w when any of the following conditions is true:
1339 * - there are pending frames in software queue
1340 * - the TID is currently paused for ADDBA/BAR request
1341 * - seqno is not within block-ack window
1342 * - h/w queue depth exceeds low water mark
1344 if (!list_empty(&tid
->buf_q
) || tid
->paused
||
1345 !BAW_WITHIN(tid
->seq_start
, tid
->baw_size
, bf
->bf_seqno
) ||
1346 txctl
->txq
->axq_depth
>= ATH_AGGR_MIN_QDEPTH
) {
1348 * Add this frame to software queue for scheduling later
1351 list_move_tail(&bf
->list
, &tid
->buf_q
);
1352 ath_tx_queue_tid(txctl
->txq
, tid
);
1356 /* Add sub-frame to BAW */
1357 ath_tx_addto_baw(sc
, tid
, bf
);
1359 /* Queue to h/w without aggregation */
1362 ath_buf_set_rate(sc
, bf
);
1363 ath_tx_txqaddbuf(sc
, txctl
->txq
, bf_head
);
1366 static void ath_tx_send_ht_normal(struct ath_softc
*sc
, struct ath_txq
*txq
,
1367 struct ath_atx_tid
*tid
,
1368 struct list_head
*bf_head
)
1372 bf
= list_first_entry(bf_head
, struct ath_buf
, list
);
1373 bf
->bf_state
.bf_type
&= ~BUF_AMPDU
;
1375 /* update starting sequence number for subsequent ADDBA request */
1376 INCR(tid
->seq_start
, IEEE80211_SEQ_MAX
);
1380 ath_buf_set_rate(sc
, bf
);
1381 ath_tx_txqaddbuf(sc
, txq
, bf_head
);
1382 TX_STAT_INC(txq
->axq_qnum
, queued
);
1385 static void ath_tx_send_normal(struct ath_softc
*sc
, struct ath_txq
*txq
,
1386 struct list_head
*bf_head
)
1390 bf
= list_first_entry(bf_head
, struct ath_buf
, list
);
1394 ath_buf_set_rate(sc
, bf
);
1395 ath_tx_txqaddbuf(sc
, txq
, bf_head
);
1396 TX_STAT_INC(txq
->axq_qnum
, queued
);
1399 static enum ath9k_pkt_type
get_hw_packet_type(struct sk_buff
*skb
)
1401 struct ieee80211_hdr
*hdr
;
1402 enum ath9k_pkt_type htype
;
1405 hdr
= (struct ieee80211_hdr
*)skb
->data
;
1406 fc
= hdr
->frame_control
;
1408 if (ieee80211_is_beacon(fc
))
1409 htype
= ATH9K_PKT_TYPE_BEACON
;
1410 else if (ieee80211_is_probe_resp(fc
))
1411 htype
= ATH9K_PKT_TYPE_PROBE_RESP
;
1412 else if (ieee80211_is_atim(fc
))
1413 htype
= ATH9K_PKT_TYPE_ATIM
;
1414 else if (ieee80211_is_pspoll(fc
))
1415 htype
= ATH9K_PKT_TYPE_PSPOLL
;
1417 htype
= ATH9K_PKT_TYPE_NORMAL
;
1422 static int get_hw_crypto_keytype(struct sk_buff
*skb
)
1424 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(skb
);
1426 if (tx_info
->control
.hw_key
) {
1427 if (tx_info
->control
.hw_key
->alg
== ALG_WEP
)
1428 return ATH9K_KEY_TYPE_WEP
;
1429 else if (tx_info
->control
.hw_key
->alg
== ALG_TKIP
)
1430 return ATH9K_KEY_TYPE_TKIP
;
1431 else if (tx_info
->control
.hw_key
->alg
== ALG_CCMP
)
1432 return ATH9K_KEY_TYPE_AES
;
1435 return ATH9K_KEY_TYPE_CLEAR
;
1438 static void assign_aggr_tid_seqno(struct sk_buff
*skb
,
1441 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(skb
);
1442 struct ieee80211_hdr
*hdr
;
1443 struct ath_node
*an
;
1444 struct ath_atx_tid
*tid
;
1448 if (!tx_info
->control
.sta
)
1451 an
= (struct ath_node
*)tx_info
->control
.sta
->drv_priv
;
1452 hdr
= (struct ieee80211_hdr
*)skb
->data
;
1453 fc
= hdr
->frame_control
;
1455 if (ieee80211_is_data_qos(fc
)) {
1456 qc
= ieee80211_get_qos_ctl(hdr
);
1457 bf
->bf_tidno
= qc
[0] & 0xf;
1461 * For HT capable stations, we save tidno for later use.
1462 * We also override seqno set by upper layer with the one
1463 * in tx aggregation state.
1465 tid
= ATH_AN_2_TID(an
, bf
->bf_tidno
);
1466 hdr
->seq_ctrl
= cpu_to_le16(tid
->seq_next
<< IEEE80211_SEQ_SEQ_SHIFT
);
1467 bf
->bf_seqno
= tid
->seq_next
;
1468 INCR(tid
->seq_next
, IEEE80211_SEQ_MAX
);
1471 static int setup_tx_flags(struct sk_buff
*skb
, bool use_ldpc
)
1473 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(skb
);
1476 flags
|= ATH9K_TXDESC_CLRDMASK
; /* needed for crypto errors */
1477 flags
|= ATH9K_TXDESC_INTREQ
;
1479 if (tx_info
->flags
& IEEE80211_TX_CTL_NO_ACK
)
1480 flags
|= ATH9K_TXDESC_NOACK
;
1483 flags
|= ATH9K_TXDESC_LDPC
;
1490 * pktlen - total bytes (delims + data + fcs + pads + pad delims)
1491 * width - 0 for 20 MHz, 1 for 40 MHz
1492 * half_gi - to use 4us v/s 3.6 us for symbol time
1494 static u32
ath_pkt_duration(struct ath_softc
*sc
, u8 rix
, struct ath_buf
*bf
,
1495 int width
, int half_gi
, bool shortPreamble
)
1497 u32 nbits
, nsymbits
, duration
, nsymbols
;
1498 int streams
, pktlen
;
1500 pktlen
= bf_isaggr(bf
) ? bf
->bf_al
: bf
->bf_frmlen
;
1502 /* find number of symbols: PLCP + data */
1503 streams
= HT_RC_2_STREAMS(rix
);
1504 nbits
= (pktlen
<< 3) + OFDM_PLCP_BITS
;
1505 nsymbits
= bits_per_symbol
[rix
% 8][width
] * streams
;
1506 nsymbols
= (nbits
+ nsymbits
- 1) / nsymbits
;
1509 duration
= SYMBOL_TIME(nsymbols
);
1511 duration
= SYMBOL_TIME_HALFGI(nsymbols
);
1513 /* addup duration for legacy/ht training and signal fields */
1514 duration
+= L_STF
+ L_LTF
+ L_SIG
+ HT_SIG
+ HT_STF
+ HT_LTF(streams
);
1519 static void ath_buf_set_rate(struct ath_softc
*sc
, struct ath_buf
*bf
)
1521 struct ath_common
*common
= ath9k_hw_common(sc
->sc_ah
);
1522 struct ath9k_11n_rate_series series
[4];
1523 struct sk_buff
*skb
;
1524 struct ieee80211_tx_info
*tx_info
;
1525 struct ieee80211_tx_rate
*rates
;
1526 const struct ieee80211_rate
*rate
;
1527 struct ieee80211_hdr
*hdr
;
1529 u8 rix
= 0, ctsrate
= 0;
1532 memset(series
, 0, sizeof(struct ath9k_11n_rate_series
) * 4);
1535 tx_info
= IEEE80211_SKB_CB(skb
);
1536 rates
= tx_info
->control
.rates
;
1537 hdr
= (struct ieee80211_hdr
*)skb
->data
;
1538 is_pspoll
= ieee80211_is_pspoll(hdr
->frame_control
);
1541 * We check if Short Preamble is needed for the CTS rate by
1542 * checking the BSS's global flag.
1543 * But for the rate series, IEEE80211_TX_RC_USE_SHORT_PREAMBLE is used.
1545 rate
= ieee80211_get_rts_cts_rate(sc
->hw
, tx_info
);
1546 ctsrate
= rate
->hw_value
;
1547 if (sc
->sc_flags
& SC_OP_PREAMBLE_SHORT
)
1548 ctsrate
|= rate
->hw_value_short
;
1550 for (i
= 0; i
< 4; i
++) {
1551 bool is_40
, is_sgi
, is_sp
;
1554 if (!rates
[i
].count
|| (rates
[i
].idx
< 0))
1558 series
[i
].Tries
= rates
[i
].count
;
1559 series
[i
].ChSel
= common
->tx_chainmask
;
1561 if ((sc
->config
.ath_aggr_prot
&& bf_isaggr(bf
)) ||
1562 (rates
[i
].flags
& IEEE80211_TX_RC_USE_RTS_CTS
)) {
1563 series
[i
].RateFlags
|= ATH9K_RATESERIES_RTS_CTS
;
1564 flags
|= ATH9K_TXDESC_RTSENA
;
1565 } else if (rates
[i
].flags
& IEEE80211_TX_RC_USE_CTS_PROTECT
) {
1566 series
[i
].RateFlags
|= ATH9K_RATESERIES_RTS_CTS
;
1567 flags
|= ATH9K_TXDESC_CTSENA
;
1570 if (rates
[i
].flags
& IEEE80211_TX_RC_40_MHZ_WIDTH
)
1571 series
[i
].RateFlags
|= ATH9K_RATESERIES_2040
;
1572 if (rates
[i
].flags
& IEEE80211_TX_RC_SHORT_GI
)
1573 series
[i
].RateFlags
|= ATH9K_RATESERIES_HALFGI
;
1575 is_sgi
= !!(rates
[i
].flags
& IEEE80211_TX_RC_SHORT_GI
);
1576 is_40
= !!(rates
[i
].flags
& IEEE80211_TX_RC_40_MHZ_WIDTH
);
1577 is_sp
= !!(rates
[i
].flags
& IEEE80211_TX_RC_USE_SHORT_PREAMBLE
);
1579 if (rates
[i
].flags
& IEEE80211_TX_RC_MCS
) {
1581 series
[i
].Rate
= rix
| 0x80;
1582 series
[i
].PktDuration
= ath_pkt_duration(sc
, rix
, bf
,
1583 is_40
, is_sgi
, is_sp
);
1584 if (rix
< 8 && (tx_info
->flags
& IEEE80211_TX_CTL_STBC
))
1585 series
[i
].RateFlags
|= ATH9K_RATESERIES_STBC
;
1590 if ((tx_info
->band
== IEEE80211_BAND_2GHZ
) &&
1591 !(rate
->flags
& IEEE80211_RATE_ERP_G
))
1592 phy
= WLAN_RC_PHY_CCK
;
1594 phy
= WLAN_RC_PHY_OFDM
;
1596 rate
= &sc
->sbands
[tx_info
->band
].bitrates
[rates
[i
].idx
];
1597 series
[i
].Rate
= rate
->hw_value
;
1598 if (rate
->hw_value_short
) {
1599 if (rates
[i
].flags
& IEEE80211_TX_RC_USE_SHORT_PREAMBLE
)
1600 series
[i
].Rate
|= rate
->hw_value_short
;
1605 series
[i
].PktDuration
= ath9k_hw_computetxtime(sc
->sc_ah
,
1606 phy
, rate
->bitrate
* 100, bf
->bf_frmlen
, rix
, is_sp
);
1609 /* For AR5416 - RTS cannot be followed by a frame larger than 8K */
1610 if (bf_isaggr(bf
) && (bf
->bf_al
> sc
->sc_ah
->caps
.rts_aggr_limit
))
1611 flags
&= ~ATH9K_TXDESC_RTSENA
;
1613 /* ATH9K_TXDESC_RTSENA and ATH9K_TXDESC_CTSENA are mutually exclusive. */
1614 if (flags
& ATH9K_TXDESC_RTSENA
)
1615 flags
&= ~ATH9K_TXDESC_CTSENA
;
1617 /* set dur_update_en for l-sig computation except for PS-Poll frames */
1618 ath9k_hw_set11n_ratescenario(sc
->sc_ah
, bf
->bf_desc
,
1619 bf
->bf_lastbf
->bf_desc
,
1620 !is_pspoll
, ctsrate
,
1621 0, series
, 4, flags
);
1623 if (sc
->config
.ath_aggr_prot
&& flags
)
1624 ath9k_hw_set11n_burstduration(sc
->sc_ah
, bf
->bf_desc
, 8192);
1627 static int ath_tx_setup_buffer(struct ieee80211_hw
*hw
, struct ath_buf
*bf
,
1628 struct sk_buff
*skb
,
1629 struct ath_tx_control
*txctl
)
1631 struct ath_wiphy
*aphy
= hw
->priv
;
1632 struct ath_softc
*sc
= aphy
->sc
;
1633 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(skb
);
1634 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
1637 int padpos
, padsize
;
1638 bool use_ldpc
= false;
1640 tx_info
->pad
[0] = 0;
1641 switch (txctl
->frame_type
) {
1642 case ATH9K_IFT_NOT_INTERNAL
:
1644 case ATH9K_IFT_PAUSE
:
1645 tx_info
->pad
[0] |= ATH_TX_INFO_FRAME_TYPE_PAUSE
;
1647 case ATH9K_IFT_UNPAUSE
:
1648 tx_info
->pad
[0] |= ATH_TX_INFO_FRAME_TYPE_INTERNAL
;
1651 hdrlen
= ieee80211_get_hdrlen_from_skb(skb
);
1652 fc
= hdr
->frame_control
;
1654 ATH_TXBUF_RESET(bf
);
1657 bf
->bf_frmlen
= skb
->len
+ FCS_LEN
;
1658 /* Remove the padding size from bf_frmlen, if any */
1659 padpos
= ath9k_cmn_padpos(hdr
->frame_control
);
1660 padsize
= padpos
& 3;
1661 if (padsize
&& skb
->len
>padpos
+padsize
) {
1662 bf
->bf_frmlen
-= padsize
;
1665 if (conf_is_ht(&hw
->conf
)) {
1666 bf
->bf_state
.bf_type
|= BUF_HT
;
1667 if (tx_info
->flags
& IEEE80211_TX_CTL_LDPC
)
1671 bf
->bf_flags
= setup_tx_flags(skb
, use_ldpc
);
1673 bf
->bf_keytype
= get_hw_crypto_keytype(skb
);
1674 if (bf
->bf_keytype
!= ATH9K_KEY_TYPE_CLEAR
) {
1675 bf
->bf_frmlen
+= tx_info
->control
.hw_key
->icv_len
;
1676 bf
->bf_keyix
= tx_info
->control
.hw_key
->hw_key_idx
;
1678 bf
->bf_keyix
= ATH9K_TXKEYIX_INVALID
;
1681 if (ieee80211_is_data_qos(fc
) && bf_isht(bf
) &&
1682 (sc
->sc_flags
& SC_OP_TXAGGR
))
1683 assign_aggr_tid_seqno(skb
, bf
);
1687 bf
->bf_dmacontext
= dma_map_single(sc
->dev
, skb
->data
,
1688 skb
->len
, DMA_TO_DEVICE
);
1689 if (unlikely(dma_mapping_error(sc
->dev
, bf
->bf_dmacontext
))) {
1691 ath_print(ath9k_hw_common(sc
->sc_ah
), ATH_DBG_FATAL
,
1692 "dma_mapping_error() on TX\n");
1696 bf
->bf_buf_addr
= bf
->bf_dmacontext
;
1698 /* tag if this is a nullfunc frame to enable PS when AP acks it */
1699 if (ieee80211_is_nullfunc(fc
) && ieee80211_has_pm(fc
)) {
1700 bf
->bf_isnullfunc
= true;
1701 sc
->ps_flags
&= ~PS_NULLFUNC_COMPLETED
;
1703 bf
->bf_isnullfunc
= false;
1705 bf
->bf_tx_aborted
= false;
1710 /* FIXME: tx power */
1711 static void ath_tx_start_dma(struct ath_softc
*sc
, struct ath_buf
*bf
,
1712 struct ath_tx_control
*txctl
)
1714 struct sk_buff
*skb
= bf
->bf_mpdu
;
1715 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(skb
);
1716 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
1717 struct ath_node
*an
= NULL
;
1718 struct list_head bf_head
;
1719 struct ath_desc
*ds
;
1720 struct ath_atx_tid
*tid
;
1721 struct ath_hw
*ah
= sc
->sc_ah
;
1725 frm_type
= get_hw_packet_type(skb
);
1726 fc
= hdr
->frame_control
;
1728 INIT_LIST_HEAD(&bf_head
);
1729 list_add_tail(&bf
->list
, &bf_head
);
1732 ath9k_hw_set_desc_link(ah
, ds
, 0);
1734 ath9k_hw_set11n_txdesc(ah
, ds
, bf
->bf_frmlen
, frm_type
, MAX_RATE_POWER
,
1735 bf
->bf_keyix
, bf
->bf_keytype
, bf
->bf_flags
);
1737 ath9k_hw_filltxdesc(ah
, ds
,
1738 skb
->len
, /* segment length */
1739 true, /* first segment */
1740 true, /* last segment */
1741 ds
, /* first descriptor */
1743 txctl
->txq
->axq_qnum
);
1745 spin_lock_bh(&txctl
->txq
->axq_lock
);
1747 if (bf_isht(bf
) && (sc
->sc_flags
& SC_OP_TXAGGR
) &&
1748 tx_info
->control
.sta
) {
1749 an
= (struct ath_node
*)tx_info
->control
.sta
->drv_priv
;
1750 tid
= ATH_AN_2_TID(an
, bf
->bf_tidno
);
1752 if (!ieee80211_is_data_qos(fc
)) {
1753 ath_tx_send_normal(sc
, txctl
->txq
, &bf_head
);
1757 if (tx_info
->flags
& IEEE80211_TX_CTL_AMPDU
) {
1759 * Try aggregation if it's a unicast data frame
1760 * and the destination is HT capable.
1762 ath_tx_send_ampdu(sc
, tid
, &bf_head
, txctl
);
1765 * Send this frame as regular when ADDBA
1766 * exchange is neither complete nor pending.
1768 ath_tx_send_ht_normal(sc
, txctl
->txq
,
1772 ath_tx_send_normal(sc
, txctl
->txq
, &bf_head
);
1776 spin_unlock_bh(&txctl
->txq
->axq_lock
);
1779 /* Upon failure caller should free skb */
1780 int ath_tx_start(struct ieee80211_hw
*hw
, struct sk_buff
*skb
,
1781 struct ath_tx_control
*txctl
)
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 ath_txq
*txq
= txctl
->txq
;
1790 bf
= ath_tx_get_buffer(sc
);
1792 ath_print(common
, ATH_DBG_XMIT
, "TX buffers are full\n");
1796 bf
->txq
= txctl
->txq
;
1797 spin_lock_bh(&bf
->txq
->axq_lock
);
1798 if (++bf
->txq
->pending_frames
> ATH_MAX_QDEPTH
&& !txq
->stopped
) {
1799 ath_mac80211_stop_queue(sc
, skb_get_queue_mapping(skb
));
1802 spin_unlock_bh(&bf
->txq
->axq_lock
);
1804 r
= ath_tx_setup_buffer(hw
, bf
, skb
, txctl
);
1806 ath_print(common
, ATH_DBG_FATAL
, "TX mem alloc failure\n");
1808 /* upon ath_tx_processq() this TX queue will be resumed, we
1809 * guarantee this will happen by knowing beforehand that
1810 * we will at least have to run TX completionon one buffer
1812 spin_lock_bh(&txq
->axq_lock
);
1813 if (!txq
->stopped
&& txq
->axq_depth
> 1) {
1814 ath_mac80211_stop_queue(sc
, skb_get_queue_mapping(skb
));
1817 spin_unlock_bh(&txq
->axq_lock
);
1819 ath_tx_return_buffer(sc
, bf
);
1824 ath_tx_start_dma(sc
, bf
, txctl
);
1829 void ath_tx_cabq(struct ieee80211_hw
*hw
, struct sk_buff
*skb
)
1831 struct ath_wiphy
*aphy
= hw
->priv
;
1832 struct ath_softc
*sc
= aphy
->sc
;
1833 struct ath_common
*common
= ath9k_hw_common(sc
->sc_ah
);
1834 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1835 int padpos
, padsize
;
1836 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1837 struct ath_tx_control txctl
;
1839 memset(&txctl
, 0, sizeof(struct ath_tx_control
));
1842 * As a temporary workaround, assign seq# here; this will likely need
1843 * to be cleaned up to work better with Beacon transmission and virtual
1846 if (info
->flags
& IEEE80211_TX_CTL_ASSIGN_SEQ
) {
1847 if (info
->flags
& IEEE80211_TX_CTL_FIRST_FRAGMENT
)
1848 sc
->tx
.seq_no
+= 0x10;
1849 hdr
->seq_ctrl
&= cpu_to_le16(IEEE80211_SCTL_FRAG
);
1850 hdr
->seq_ctrl
|= cpu_to_le16(sc
->tx
.seq_no
);
1853 /* Add the padding after the header if this is not already done */
1854 padpos
= ath9k_cmn_padpos(hdr
->frame_control
);
1855 padsize
= padpos
& 3;
1856 if (padsize
&& skb
->len
>padpos
) {
1857 if (skb_headroom(skb
) < padsize
) {
1858 ath_print(common
, ATH_DBG_XMIT
,
1859 "TX CABQ padding failed\n");
1860 dev_kfree_skb_any(skb
);
1863 skb_push(skb
, padsize
);
1864 memmove(skb
->data
, skb
->data
+ padsize
, padpos
);
1867 txctl
.txq
= sc
->beacon
.cabq
;
1869 ath_print(common
, ATH_DBG_XMIT
,
1870 "transmitting CABQ packet, skb: %p\n", skb
);
1872 if (ath_tx_start(hw
, skb
, &txctl
) != 0) {
1873 ath_print(common
, ATH_DBG_XMIT
, "CABQ TX failed\n");
1879 dev_kfree_skb_any(skb
);
1886 static void ath_tx_complete(struct ath_softc
*sc
, struct sk_buff
*skb
,
1887 struct ath_wiphy
*aphy
, int tx_flags
)
1889 struct ieee80211_hw
*hw
= sc
->hw
;
1890 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(skb
);
1891 struct ath_common
*common
= ath9k_hw_common(sc
->sc_ah
);
1892 struct ieee80211_hdr
* hdr
= (struct ieee80211_hdr
*)skb
->data
;
1893 int padpos
, padsize
;
1895 ath_print(common
, ATH_DBG_XMIT
, "TX complete: skb: %p\n", skb
);
1900 if (tx_flags
& ATH_TX_BAR
)
1901 tx_info
->flags
|= IEEE80211_TX_STAT_AMPDU_NO_BACK
;
1903 if (!(tx_flags
& (ATH_TX_ERROR
| ATH_TX_XRETRY
))) {
1904 /* Frame was ACKed */
1905 tx_info
->flags
|= IEEE80211_TX_STAT_ACK
;
1908 padpos
= ath9k_cmn_padpos(hdr
->frame_control
);
1909 padsize
= padpos
& 3;
1910 if (padsize
&& skb
->len
>padpos
+padsize
) {
1912 * Remove MAC header padding before giving the frame back to
1915 memmove(skb
->data
+ padsize
, skb
->data
, padpos
);
1916 skb_pull(skb
, padsize
);
1919 if (sc
->ps_flags
& PS_WAIT_FOR_TX_ACK
) {
1920 sc
->ps_flags
&= ~PS_WAIT_FOR_TX_ACK
;
1921 ath_print(common
, ATH_DBG_PS
,
1922 "Going back to sleep after having "
1923 "received TX status (0x%lx)\n",
1924 sc
->ps_flags
& (PS_WAIT_FOR_BEACON
|
1926 PS_WAIT_FOR_PSPOLL_DATA
|
1927 PS_WAIT_FOR_TX_ACK
));
1930 if (unlikely(tx_info
->pad
[0] & ATH_TX_INFO_FRAME_TYPE_INTERNAL
))
1931 ath9k_tx_status(hw
, skb
);
1933 ieee80211_tx_status(hw
, skb
);
1936 static void ath_tx_complete_buf(struct ath_softc
*sc
, struct ath_buf
*bf
,
1937 struct ath_txq
*txq
, struct list_head
*bf_q
,
1938 struct ath_tx_status
*ts
, int txok
, int sendbar
)
1940 struct sk_buff
*skb
= bf
->bf_mpdu
;
1941 unsigned long flags
;
1945 tx_flags
= ATH_TX_BAR
;
1948 tx_flags
|= ATH_TX_ERROR
;
1950 if (bf_isxretried(bf
))
1951 tx_flags
|= ATH_TX_XRETRY
;
1955 spin_lock_bh(&bf
->txq
->axq_lock
);
1956 bf
->txq
->pending_frames
--;
1957 spin_unlock_bh(&bf
->txq
->axq_lock
);
1961 dma_unmap_single(sc
->dev
, bf
->bf_dmacontext
, skb
->len
, DMA_TO_DEVICE
);
1962 ath_tx_complete(sc
, skb
, bf
->aphy
, tx_flags
);
1963 ath_debug_stat_tx(sc
, txq
, bf
, ts
);
1966 * Return the list of ath_buf of this mpdu to free queue
1968 spin_lock_irqsave(&sc
->tx
.txbuflock
, flags
);
1969 list_splice_tail_init(bf_q
, &sc
->tx
.txbuf
);
1970 spin_unlock_irqrestore(&sc
->tx
.txbuflock
, flags
);
1973 static int ath_tx_num_badfrms(struct ath_softc
*sc
, struct ath_buf
*bf
,
1974 struct ath_tx_status
*ts
, int txok
)
1977 u32 ba
[WME_BA_BMP_SIZE
>> 5];
1982 if (bf
->bf_lastbf
->bf_tx_aborted
)
1985 isaggr
= bf_isaggr(bf
);
1987 seq_st
= ts
->ts_seqnum
;
1988 memcpy(ba
, &ts
->ba_low
, WME_BA_BMP_SIZE
>> 3);
1992 ba_index
= ATH_BA_INDEX(seq_st
, bf
->bf_seqno
);
1993 if (!txok
|| (isaggr
&& !ATH_BA_ISSET(ba
, ba_index
)))
2002 static void ath_tx_rc_status(struct ath_buf
*bf
, struct ath_tx_status
*ts
,
2003 int nbad
, int txok
, bool update_rc
)
2005 struct sk_buff
*skb
= bf
->bf_mpdu
;
2006 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
2007 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(skb
);
2008 struct ieee80211_hw
*hw
= bf
->aphy
->hw
;
2012 tx_info
->status
.ack_signal
= ts
->ts_rssi
;
2014 tx_rateindex
= ts
->ts_rateindex
;
2015 WARN_ON(tx_rateindex
>= hw
->max_rates
);
2017 if (ts
->ts_status
& ATH9K_TXERR_FILT
)
2018 tx_info
->flags
|= IEEE80211_TX_STAT_TX_FILTERED
;
2019 if ((tx_info
->flags
& IEEE80211_TX_CTL_AMPDU
) && update_rc
)
2020 tx_info
->flags
|= IEEE80211_TX_STAT_AMPDU
;
2022 if ((ts
->ts_status
& ATH9K_TXERR_FILT
) == 0 &&
2023 (bf
->bf_flags
& ATH9K_TXDESC_NOACK
) == 0 && update_rc
) {
2024 if (ieee80211_is_data(hdr
->frame_control
)) {
2026 (ATH9K_TX_DATA_UNDERRUN
| ATH9K_TX_DELIM_UNDERRUN
))
2027 tx_info
->pad
[0] |= ATH_TX_INFO_UNDERRUN
;
2028 if ((ts
->ts_status
& ATH9K_TXERR_XRETRY
) ||
2029 (ts
->ts_status
& ATH9K_TXERR_FIFO
))
2030 tx_info
->pad
[0] |= ATH_TX_INFO_XRETRY
;
2031 tx_info
->status
.ampdu_len
= bf
->bf_nframes
;
2032 tx_info
->status
.ampdu_ack_len
= bf
->bf_nframes
- nbad
;
2036 for (i
= tx_rateindex
+ 1; i
< hw
->max_rates
; i
++) {
2037 tx_info
->status
.rates
[i
].count
= 0;
2038 tx_info
->status
.rates
[i
].idx
= -1;
2041 tx_info
->status
.rates
[tx_rateindex
].count
= bf
->bf_retries
+ 1;
2044 static void ath_wake_mac80211_queue(struct ath_softc
*sc
, struct ath_txq
*txq
)
2048 spin_lock_bh(&txq
->axq_lock
);
2049 if (txq
->stopped
&& txq
->pending_frames
< ATH_MAX_QDEPTH
) {
2050 qnum
= ath_get_mac80211_qnum(txq
->axq_qnum
, sc
);
2052 ath_mac80211_start_queue(sc
, qnum
);
2056 spin_unlock_bh(&txq
->axq_lock
);
2059 static void ath_tx_processq(struct ath_softc
*sc
, struct ath_txq
*txq
)
2061 struct ath_hw
*ah
= sc
->sc_ah
;
2062 struct ath_common
*common
= ath9k_hw_common(ah
);
2063 struct ath_buf
*bf
, *lastbf
, *bf_held
= NULL
;
2064 struct list_head bf_head
;
2065 struct ath_desc
*ds
;
2066 struct ath_tx_status ts
;
2070 ath_print(common
, ATH_DBG_QUEUE
, "tx queue %d (%x), link %p\n",
2071 txq
->axq_qnum
, ath9k_hw_gettxbuf(sc
->sc_ah
, txq
->axq_qnum
),
2075 spin_lock_bh(&txq
->axq_lock
);
2076 if (list_empty(&txq
->axq_q
)) {
2077 txq
->axq_link
= NULL
;
2078 spin_unlock_bh(&txq
->axq_lock
);
2081 bf
= list_first_entry(&txq
->axq_q
, struct ath_buf
, list
);
2084 * There is a race condition that a BH gets scheduled
2085 * after sw writes TxE and before hw re-load the last
2086 * descriptor to get the newly chained one.
2087 * Software must keep the last DONE descriptor as a
2088 * holding descriptor - software does so by marking
2089 * it with the STALE flag.
2094 if (list_is_last(&bf_held
->list
, &txq
->axq_q
)) {
2095 spin_unlock_bh(&txq
->axq_lock
);
2098 bf
= list_entry(bf_held
->list
.next
,
2099 struct ath_buf
, list
);
2103 lastbf
= bf
->bf_lastbf
;
2104 ds
= lastbf
->bf_desc
;
2106 memset(&ts
, 0, sizeof(ts
));
2107 status
= ath9k_hw_txprocdesc(ah
, ds
, &ts
);
2108 if (status
== -EINPROGRESS
) {
2109 spin_unlock_bh(&txq
->axq_lock
);
2114 * We now know the nullfunc frame has been ACKed so we
2117 if (bf
->bf_isnullfunc
&&
2118 (ts
.ts_status
& ATH9K_TX_ACKED
)) {
2119 if ((sc
->ps_flags
& PS_ENABLED
))
2120 ath9k_enable_ps(sc
);
2122 sc
->ps_flags
|= PS_NULLFUNC_COMPLETED
;
2126 * Remove ath_buf's of the same transmit unit from txq,
2127 * however leave the last descriptor back as the holding
2128 * descriptor for hw.
2130 lastbf
->bf_stale
= true;
2131 INIT_LIST_HEAD(&bf_head
);
2132 if (!list_is_singular(&lastbf
->list
))
2133 list_cut_position(&bf_head
,
2134 &txq
->axq_q
, lastbf
->list
.prev
);
2137 txok
= !(ts
.ts_status
& ATH9K_TXERR_MASK
);
2138 txq
->axq_tx_inprogress
= false;
2140 list_del(&bf_held
->list
);
2141 spin_unlock_bh(&txq
->axq_lock
);
2144 ath_tx_return_buffer(sc
, bf_held
);
2146 if (!bf_isampdu(bf
)) {
2148 * This frame is sent out as a single frame.
2149 * Use hardware retry status for this frame.
2151 bf
->bf_retries
= ts
.ts_longretry
;
2152 if (ts
.ts_status
& ATH9K_TXERR_XRETRY
)
2153 bf
->bf_state
.bf_type
|= BUF_XRETRY
;
2154 ath_tx_rc_status(bf
, &ts
, 0, txok
, true);
2158 ath_tx_complete_aggr(sc
, txq
, bf
, &bf_head
, &ts
, txok
);
2160 ath_tx_complete_buf(sc
, bf
, txq
, &bf_head
, &ts
, txok
, 0);
2162 ath_wake_mac80211_queue(sc
, txq
);
2164 spin_lock_bh(&txq
->axq_lock
);
2165 if (sc
->sc_flags
& SC_OP_TXAGGR
)
2166 ath_txq_schedule(sc
, txq
);
2167 spin_unlock_bh(&txq
->axq_lock
);
2171 static void ath_tx_complete_poll_work(struct work_struct
*work
)
2173 struct ath_softc
*sc
= container_of(work
, struct ath_softc
,
2174 tx_complete_work
.work
);
2175 struct ath_txq
*txq
;
2177 bool needreset
= false;
2179 for (i
= 0; i
< ATH9K_NUM_TX_QUEUES
; i
++)
2180 if (ATH_TXQ_SETUP(sc
, i
)) {
2181 txq
= &sc
->tx
.txq
[i
];
2182 spin_lock_bh(&txq
->axq_lock
);
2183 if (txq
->axq_depth
) {
2184 if (txq
->axq_tx_inprogress
) {
2186 spin_unlock_bh(&txq
->axq_lock
);
2189 txq
->axq_tx_inprogress
= true;
2192 spin_unlock_bh(&txq
->axq_lock
);
2196 ath_print(ath9k_hw_common(sc
->sc_ah
), ATH_DBG_RESET
,
2197 "tx hung, resetting the chip\n");
2198 ath9k_ps_wakeup(sc
);
2199 ath_reset(sc
, false);
2200 ath9k_ps_restore(sc
);
2203 ieee80211_queue_delayed_work(sc
->hw
, &sc
->tx_complete_work
,
2204 msecs_to_jiffies(ATH_TX_COMPLETE_POLL_INT
));
2209 void ath_tx_tasklet(struct ath_softc
*sc
)
2212 u32 qcumask
= ((1 << ATH9K_NUM_TX_QUEUES
) - 1);
2214 ath9k_hw_gettxintrtxqs(sc
->sc_ah
, &qcumask
);
2216 for (i
= 0; i
< ATH9K_NUM_TX_QUEUES
; i
++) {
2217 if (ATH_TXQ_SETUP(sc
, i
) && (qcumask
& (1 << i
)))
2218 ath_tx_processq(sc
, &sc
->tx
.txq
[i
]);
2222 void ath_tx_edma_tasklet(struct ath_softc
*sc
)
2224 struct ath_tx_status txs
;
2225 struct ath_common
*common
= ath9k_hw_common(sc
->sc_ah
);
2226 struct ath_hw
*ah
= sc
->sc_ah
;
2227 struct ath_txq
*txq
;
2228 struct ath_buf
*bf
, *lastbf
;
2229 struct list_head bf_head
;
2234 status
= ath9k_hw_txprocdesc(ah
, NULL
, (void *)&txs
);
2235 if (status
== -EINPROGRESS
)
2237 if (status
== -EIO
) {
2238 ath_print(common
, ATH_DBG_XMIT
,
2239 "Error processing tx status\n");
2243 /* Skip beacon completions */
2244 if (txs
.qid
== sc
->beacon
.beaconq
)
2247 txq
= &sc
->tx
.txq
[txs
.qid
];
2249 spin_lock_bh(&txq
->axq_lock
);
2250 if (list_empty(&txq
->txq_fifo
[txq
->txq_tailidx
])) {
2251 spin_unlock_bh(&txq
->axq_lock
);
2255 bf
= list_first_entry(&txq
->txq_fifo
[txq
->txq_tailidx
],
2256 struct ath_buf
, list
);
2257 lastbf
= bf
->bf_lastbf
;
2259 INIT_LIST_HEAD(&bf_head
);
2260 list_cut_position(&bf_head
, &txq
->txq_fifo
[txq
->txq_tailidx
],
2262 INCR(txq
->txq_tailidx
, ATH_TXFIFO_DEPTH
);
2264 txq
->axq_tx_inprogress
= false;
2265 spin_unlock_bh(&txq
->axq_lock
);
2267 txok
= !(txs
.ts_status
& ATH9K_TXERR_MASK
);
2270 * Make sure null func frame is acked before configuring
2273 if (bf
->bf_isnullfunc
&& txok
) {
2274 if ((sc
->ps_flags
& PS_ENABLED
))
2275 ath9k_enable_ps(sc
);
2277 sc
->ps_flags
|= PS_NULLFUNC_COMPLETED
;
2280 if (!bf_isampdu(bf
)) {
2281 bf
->bf_retries
= txs
.ts_longretry
;
2282 if (txs
.ts_status
& ATH9K_TXERR_XRETRY
)
2283 bf
->bf_state
.bf_type
|= BUF_XRETRY
;
2284 ath_tx_rc_status(bf
, &txs
, 0, txok
, true);
2288 ath_tx_complete_aggr(sc
, txq
, bf
, &bf_head
, &txs
, txok
);
2290 ath_tx_complete_buf(sc
, bf
, txq
, &bf_head
,
2293 ath_wake_mac80211_queue(sc
, txq
);
2295 spin_lock_bh(&txq
->axq_lock
);
2296 if (!list_empty(&txq
->txq_fifo_pending
)) {
2297 INIT_LIST_HEAD(&bf_head
);
2298 bf
= list_first_entry(&txq
->txq_fifo_pending
,
2299 struct ath_buf
, list
);
2300 list_cut_position(&bf_head
, &txq
->txq_fifo_pending
,
2301 &bf
->bf_lastbf
->list
);
2302 ath_tx_txqaddbuf(sc
, txq
, &bf_head
);
2303 } else if (sc
->sc_flags
& SC_OP_TXAGGR
)
2304 ath_txq_schedule(sc
, txq
);
2305 spin_unlock_bh(&txq
->axq_lock
);
2313 static int ath_txstatus_setup(struct ath_softc
*sc
, int size
)
2315 struct ath_descdma
*dd
= &sc
->txsdma
;
2316 u8 txs_len
= sc
->sc_ah
->caps
.txs_len
;
2318 dd
->dd_desc_len
= size
* txs_len
;
2319 dd
->dd_desc
= dma_alloc_coherent(sc
->dev
, dd
->dd_desc_len
,
2320 &dd
->dd_desc_paddr
, GFP_KERNEL
);
2327 static int ath_tx_edma_init(struct ath_softc
*sc
)
2331 err
= ath_txstatus_setup(sc
, ATH_TXSTATUS_RING_SIZE
);
2333 ath9k_hw_setup_statusring(sc
->sc_ah
, sc
->txsdma
.dd_desc
,
2334 sc
->txsdma
.dd_desc_paddr
,
2335 ATH_TXSTATUS_RING_SIZE
);
2340 static void ath_tx_edma_cleanup(struct ath_softc
*sc
)
2342 struct ath_descdma
*dd
= &sc
->txsdma
;
2344 dma_free_coherent(sc
->dev
, dd
->dd_desc_len
, dd
->dd_desc
,
2348 int ath_tx_init(struct ath_softc
*sc
, int nbufs
)
2350 struct ath_common
*common
= ath9k_hw_common(sc
->sc_ah
);
2353 spin_lock_init(&sc
->tx
.txbuflock
);
2355 error
= ath_descdma_setup(sc
, &sc
->tx
.txdma
, &sc
->tx
.txbuf
,
2358 ath_print(common
, ATH_DBG_FATAL
,
2359 "Failed to allocate tx descriptors: %d\n", error
);
2363 error
= ath_descdma_setup(sc
, &sc
->beacon
.bdma
, &sc
->beacon
.bbuf
,
2364 "beacon", ATH_BCBUF
, 1, 1);
2366 ath_print(common
, ATH_DBG_FATAL
,
2367 "Failed to allocate beacon descriptors: %d\n", error
);
2371 INIT_DELAYED_WORK(&sc
->tx_complete_work
, ath_tx_complete_poll_work
);
2373 if (sc
->sc_ah
->caps
.hw_caps
& ATH9K_HW_CAP_EDMA
) {
2374 error
= ath_tx_edma_init(sc
);
2386 void ath_tx_cleanup(struct ath_softc
*sc
)
2388 if (sc
->beacon
.bdma
.dd_desc_len
!= 0)
2389 ath_descdma_cleanup(sc
, &sc
->beacon
.bdma
, &sc
->beacon
.bbuf
);
2391 if (sc
->tx
.txdma
.dd_desc_len
!= 0)
2392 ath_descdma_cleanup(sc
, &sc
->tx
.txdma
, &sc
->tx
.txbuf
);
2394 if (sc
->sc_ah
->caps
.hw_caps
& ATH9K_HW_CAP_EDMA
)
2395 ath_tx_edma_cleanup(sc
);
2398 void ath_tx_node_init(struct ath_softc
*sc
, struct ath_node
*an
)
2400 struct ath_atx_tid
*tid
;
2401 struct ath_atx_ac
*ac
;
2404 for (tidno
= 0, tid
= &an
->tid
[tidno
];
2405 tidno
< WME_NUM_TID
;
2409 tid
->seq_start
= tid
->seq_next
= 0;
2410 tid
->baw_size
= WME_MAX_BA
;
2411 tid
->baw_head
= tid
->baw_tail
= 0;
2413 tid
->paused
= false;
2414 tid
->state
&= ~AGGR_CLEANUP
;
2415 INIT_LIST_HEAD(&tid
->buf_q
);
2416 acno
= TID_TO_WME_AC(tidno
);
2417 tid
->ac
= &an
->ac
[acno
];
2418 tid
->state
&= ~AGGR_ADDBA_COMPLETE
;
2419 tid
->state
&= ~AGGR_ADDBA_PROGRESS
;
2422 for (acno
= 0, ac
= &an
->ac
[acno
];
2423 acno
< WME_NUM_AC
; acno
++, ac
++) {
2425 INIT_LIST_HEAD(&ac
->tid_q
);
2429 ac
->qnum
= ath_tx_get_qnum(sc
,
2430 ATH9K_TX_QUEUE_DATA
, ATH9K_WME_AC_BE
);
2433 ac
->qnum
= ath_tx_get_qnum(sc
,
2434 ATH9K_TX_QUEUE_DATA
, ATH9K_WME_AC_BK
);
2437 ac
->qnum
= ath_tx_get_qnum(sc
,
2438 ATH9K_TX_QUEUE_DATA
, ATH9K_WME_AC_VI
);
2441 ac
->qnum
= ath_tx_get_qnum(sc
,
2442 ATH9K_TX_QUEUE_DATA
, ATH9K_WME_AC_VO
);
2448 void ath_tx_node_cleanup(struct ath_softc
*sc
, struct ath_node
*an
)
2451 struct ath_atx_ac
*ac
, *ac_tmp
;
2452 struct ath_atx_tid
*tid
, *tid_tmp
;
2453 struct ath_txq
*txq
;
2455 for (i
= 0; i
< ATH9K_NUM_TX_QUEUES
; i
++) {
2456 if (ATH_TXQ_SETUP(sc
, i
)) {
2457 txq
= &sc
->tx
.txq
[i
];
2459 spin_lock_bh(&txq
->axq_lock
);
2461 list_for_each_entry_safe(ac
,
2462 ac_tmp
, &txq
->axq_acq
, list
) {
2463 tid
= list_first_entry(&ac
->tid_q
,
2464 struct ath_atx_tid
, list
);
2465 if (tid
&& tid
->an
!= an
)
2467 list_del(&ac
->list
);
2470 list_for_each_entry_safe(tid
,
2471 tid_tmp
, &ac
->tid_q
, list
) {
2472 list_del(&tid
->list
);
2474 ath_tid_drain(sc
, txq
, tid
);
2475 tid
->state
&= ~AGGR_ADDBA_COMPLETE
;
2476 tid
->state
&= ~AGGR_CLEANUP
;
2480 spin_unlock_bh(&txq
->axq_lock
);