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1// SPDX-License-Identifier: ISC
2/*
3 * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
4 */
5
6#include "mt76.h"
7
8static int
9mt76_txq_get_qid(struct ieee80211_txq *txq)
10{
11 if (!txq->sta)
12 return MT_TXQ_BE;
13
14 return txq->ac;
15}
16
17void
18mt76_tx_check_agg_ssn(struct ieee80211_sta *sta, struct sk_buff *skb)
19{
20 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
21 struct ieee80211_txq *txq;
22 struct mt76_txq *mtxq;
23 u8 tid;
24
25 if (!sta || !ieee80211_is_data_qos(hdr->frame_control) ||
26 !ieee80211_is_data_present(hdr->frame_control))
27 return;
28
29 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
30 txq = sta->txq[tid];
31 mtxq = (struct mt76_txq *)txq->drv_priv;
32 if (!mtxq->aggr)
33 return;
34
35 mtxq->agg_ssn = le16_to_cpu(hdr->seq_ctrl) + 0x10;
36}
37EXPORT_SYMBOL_GPL(mt76_tx_check_agg_ssn);
38
39void
40mt76_tx_status_lock(struct mt76_dev *dev, struct sk_buff_head *list)
41 __acquires(&dev->status_lock)
42{
43 __skb_queue_head_init(list);
44 spin_lock_bh(&dev->status_lock);
45}
46EXPORT_SYMBOL_GPL(mt76_tx_status_lock);
47
48void
49mt76_tx_status_unlock(struct mt76_dev *dev, struct sk_buff_head *list)
50 __releases(&dev->status_lock)
51{
52 struct ieee80211_hw *hw;
53 struct sk_buff *skb;
54
55 spin_unlock_bh(&dev->status_lock);
56
57 rcu_read_lock();
58 while ((skb = __skb_dequeue(list)) != NULL) {
59 struct ieee80211_tx_status status = {
60 .skb = skb,
61 .info = IEEE80211_SKB_CB(skb),
62 };
63 struct ieee80211_rate_status rs = {};
64 struct mt76_tx_cb *cb = mt76_tx_skb_cb(skb);
65 struct mt76_wcid *wcid;
66
67 wcid = rcu_dereference(dev->wcid[cb->wcid]);
68 if (wcid) {
69 status.sta = wcid_to_sta(wcid);
70 if (status.sta && (wcid->rate.flags || wcid->rate.legacy)) {
71 rs.rate_idx = wcid->rate;
72 status.rates = &rs;
73 status.n_rates = 1;
74 } else {
75 status.n_rates = 0;
76 }
77 }
78
79 hw = mt76_tx_status_get_hw(dev, skb);
80 spin_lock_bh(&dev->rx_lock);
81 ieee80211_tx_status_ext(hw, &status);
82 spin_unlock_bh(&dev->rx_lock);
83 }
84 rcu_read_unlock();
85}
86EXPORT_SYMBOL_GPL(mt76_tx_status_unlock);
87
88static void
89__mt76_tx_status_skb_done(struct mt76_dev *dev, struct sk_buff *skb, u8 flags,
90 struct sk_buff_head *list)
91{
92 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
93 struct mt76_tx_cb *cb = mt76_tx_skb_cb(skb);
94 u8 done = MT_TX_CB_DMA_DONE | MT_TX_CB_TXS_DONE;
95
96 flags |= cb->flags;
97 cb->flags = flags;
98
99 if ((flags & done) != done)
100 return;
101
102 /* Tx status can be unreliable. if it fails, mark the frame as ACKed */
103 if (flags & MT_TX_CB_TXS_FAILED) {
104 info->status.rates[0].count = 0;
105 info->status.rates[0].idx = -1;
106 info->flags |= IEEE80211_TX_STAT_ACK;
107 }
108
109 __skb_queue_tail(list, skb);
110}
111
112void
113mt76_tx_status_skb_done(struct mt76_dev *dev, struct sk_buff *skb,
114 struct sk_buff_head *list)
115{
116 __mt76_tx_status_skb_done(dev, skb, MT_TX_CB_TXS_DONE, list);
117}
118EXPORT_SYMBOL_GPL(mt76_tx_status_skb_done);
119
120int
121mt76_tx_status_skb_add(struct mt76_dev *dev, struct mt76_wcid *wcid,
122 struct sk_buff *skb)
123{
124 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
125 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
126 struct mt76_tx_cb *cb = mt76_tx_skb_cb(skb);
127 int pid;
128
129 memset(cb, 0, sizeof(*cb));
130
131 if (!wcid || !rcu_access_pointer(dev->wcid[wcid->idx]))
132 return MT_PACKET_ID_NO_ACK;
133
134 if (info->flags & IEEE80211_TX_CTL_NO_ACK)
135 return MT_PACKET_ID_NO_ACK;
136
137 if (!(info->flags & (IEEE80211_TX_CTL_REQ_TX_STATUS |
138 IEEE80211_TX_CTL_RATE_CTRL_PROBE))) {
139 if (mtk_wed_device_active(&dev->mmio.wed) &&
140 ((info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) ||
141 ieee80211_is_data(hdr->frame_control)))
142 return MT_PACKET_ID_WED;
143
144 return MT_PACKET_ID_NO_SKB;
145 }
146
147 spin_lock_bh(&dev->status_lock);
148
149 pid = idr_alloc(&wcid->pktid, skb, MT_PACKET_ID_FIRST,
150 MT_PACKET_ID_MASK, GFP_ATOMIC);
151 if (pid < 0) {
152 pid = MT_PACKET_ID_NO_SKB;
153 goto out;
154 }
155
156 cb->wcid = wcid->idx;
157 cb->pktid = pid;
158
159 if (list_empty(&wcid->list))
160 list_add_tail(&wcid->list, &dev->wcid_list);
161
162out:
163 spin_unlock_bh(&dev->status_lock);
164
165 return pid;
166}
167EXPORT_SYMBOL_GPL(mt76_tx_status_skb_add);
168
169struct sk_buff *
170mt76_tx_status_skb_get(struct mt76_dev *dev, struct mt76_wcid *wcid, int pktid,
171 struct sk_buff_head *list)
172{
173 struct sk_buff *skb;
174 int id;
175
176 lockdep_assert_held(&dev->status_lock);
177
178 skb = idr_remove(&wcid->pktid, pktid);
179 if (skb)
180 goto out;
181
182 /* look for stale entries in the wcid idr queue */
183 idr_for_each_entry(&wcid->pktid, skb, id) {
184 struct mt76_tx_cb *cb = mt76_tx_skb_cb(skb);
185
186 if (pktid >= 0) {
187 if (!(cb->flags & MT_TX_CB_DMA_DONE))
188 continue;
189
190 if (time_is_after_jiffies(cb->jiffies +
191 MT_TX_STATUS_SKB_TIMEOUT))
192 continue;
193 }
194
195 /* It has been too long since DMA_DONE, time out this packet
196 * and stop waiting for TXS callback.
197 */
198 idr_remove(&wcid->pktid, cb->pktid);
199 __mt76_tx_status_skb_done(dev, skb, MT_TX_CB_TXS_FAILED |
200 MT_TX_CB_TXS_DONE, list);
201 }
202
203out:
204 if (idr_is_empty(&wcid->pktid))
205 list_del_init(&wcid->list);
206
207 return skb;
208}
209EXPORT_SYMBOL_GPL(mt76_tx_status_skb_get);
210
211void
212mt76_tx_status_check(struct mt76_dev *dev, bool flush)
213{
214 struct mt76_wcid *wcid, *tmp;
215 struct sk_buff_head list;
216
217 mt76_tx_status_lock(dev, &list);
218 list_for_each_entry_safe(wcid, tmp, &dev->wcid_list, list)
219 mt76_tx_status_skb_get(dev, wcid, flush ? -1 : 0, &list);
220 mt76_tx_status_unlock(dev, &list);
221}
222EXPORT_SYMBOL_GPL(mt76_tx_status_check);
223
224static void
225mt76_tx_check_non_aql(struct mt76_dev *dev, struct mt76_wcid *wcid,
226 struct sk_buff *skb)
227{
228 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
229 int pending;
230
231 if (!wcid || info->tx_time_est)
232 return;
233
234 pending = atomic_dec_return(&wcid->non_aql_packets);
235 if (pending < 0)
236 atomic_cmpxchg(&wcid->non_aql_packets, pending, 0);
237}
238
239void __mt76_tx_complete_skb(struct mt76_dev *dev, u16 wcid_idx, struct sk_buff *skb,
240 struct list_head *free_list)
241{
242 struct mt76_tx_cb *cb = mt76_tx_skb_cb(skb);
243 struct ieee80211_tx_status status = {
244 .skb = skb,
245 .free_list = free_list,
246 };
247 struct mt76_wcid *wcid = NULL;
248 struct ieee80211_hw *hw;
249 struct sk_buff_head list;
250
251 rcu_read_lock();
252
253 if (wcid_idx < ARRAY_SIZE(dev->wcid))
254 wcid = rcu_dereference(dev->wcid[wcid_idx]);
255
256 mt76_tx_check_non_aql(dev, wcid, skb);
257
258#ifdef CONFIG_NL80211_TESTMODE
259 if (mt76_is_testmode_skb(dev, skb, &hw)) {
260 struct mt76_phy *phy = hw->priv;
261
262 if (skb == phy->test.tx_skb)
263 phy->test.tx_done++;
264 if (phy->test.tx_queued == phy->test.tx_done)
265 wake_up(&dev->tx_wait);
266
267 dev_kfree_skb_any(skb);
268 goto out;
269 }
270#endif
271
272 if (cb->pktid < MT_PACKET_ID_FIRST) {
273 struct ieee80211_rate_status rs = {};
274
275 hw = mt76_tx_status_get_hw(dev, skb);
276 status.sta = wcid_to_sta(wcid);
277 if (status.sta && (wcid->rate.flags || wcid->rate.legacy)) {
278 rs.rate_idx = wcid->rate;
279 status.rates = &rs;
280 status.n_rates = 1;
281 }
282 spin_lock_bh(&dev->rx_lock);
283 ieee80211_tx_status_ext(hw, &status);
284 spin_unlock_bh(&dev->rx_lock);
285 goto out;
286 }
287
288 mt76_tx_status_lock(dev, &list);
289 cb->jiffies = jiffies;
290 __mt76_tx_status_skb_done(dev, skb, MT_TX_CB_DMA_DONE, &list);
291 mt76_tx_status_unlock(dev, &list);
292
293out:
294 rcu_read_unlock();
295}
296EXPORT_SYMBOL_GPL(__mt76_tx_complete_skb);
297
298static int
299__mt76_tx_queue_skb(struct mt76_phy *phy, int qid, struct sk_buff *skb,
300 struct mt76_wcid *wcid, struct ieee80211_sta *sta,
301 bool *stop)
302{
303 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
304 struct mt76_queue *q = phy->q_tx[qid];
305 struct mt76_dev *dev = phy->dev;
306 bool non_aql;
307 int pending;
308 int idx;
309
310 non_aql = !info->tx_time_est;
311 idx = dev->queue_ops->tx_queue_skb(phy, q, qid, skb, wcid, sta);
312 if (idx < 0 || !sta)
313 return idx;
314
315 wcid = (struct mt76_wcid *)sta->drv_priv;
316 if (!wcid->sta)
317 return idx;
318
319 q->entry[idx].wcid = wcid->idx;
320
321 if (!non_aql)
322 return idx;
323
324 pending = atomic_inc_return(&wcid->non_aql_packets);
325 if (stop && pending >= MT_MAX_NON_AQL_PKT)
326 *stop = true;
327
328 return idx;
329}
330
331void
332mt76_tx(struct mt76_phy *phy, struct ieee80211_sta *sta,
333 struct mt76_wcid *wcid, struct sk_buff *skb)
334{
335 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
336 struct sk_buff_head *head;
337
338 if (mt76_testmode_enabled(phy)) {
339 ieee80211_free_txskb(phy->hw, skb);
340 return;
341 }
342
343 if (WARN_ON(skb_get_queue_mapping(skb) >= MT_TXQ_PSD))
344 skb_set_queue_mapping(skb, MT_TXQ_BE);
345
346 if (wcid && !(wcid->tx_info & MT_WCID_TX_INFO_SET))
347 ieee80211_get_tx_rates(info->control.vif, sta, skb,
348 info->control.rates, 1);
349
350 info->hw_queue |= FIELD_PREP(MT_TX_HW_QUEUE_PHY, phy->band_idx);
351
352 if ((info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) ||
353 (info->control.flags & IEEE80211_TX_CTRL_DONT_USE_RATE_MASK))
354 head = &wcid->tx_offchannel;
355 else
356 head = &wcid->tx_pending;
357
358 spin_lock_bh(&head->lock);
359 __skb_queue_tail(head, skb);
360 spin_unlock_bh(&head->lock);
361
362 spin_lock_bh(&phy->tx_lock);
363 if (list_empty(&wcid->tx_list))
364 list_add_tail(&wcid->tx_list, &phy->tx_list);
365 spin_unlock_bh(&phy->tx_lock);
366
367 mt76_worker_schedule(&phy->dev->tx_worker);
368}
369EXPORT_SYMBOL_GPL(mt76_tx);
370
371static struct sk_buff *
372mt76_txq_dequeue(struct mt76_phy *phy, struct mt76_txq *mtxq)
373{
374 struct ieee80211_txq *txq = mtxq_to_txq(mtxq);
375 struct ieee80211_tx_info *info;
376 struct sk_buff *skb;
377
378 skb = ieee80211_tx_dequeue(phy->hw, txq);
379 if (!skb)
380 return NULL;
381
382 info = IEEE80211_SKB_CB(skb);
383 info->hw_queue |= FIELD_PREP(MT_TX_HW_QUEUE_PHY, phy->band_idx);
384
385 return skb;
386}
387
388static void
389mt76_queue_ps_skb(struct mt76_phy *phy, struct ieee80211_sta *sta,
390 struct sk_buff *skb, bool last)
391{
392 struct mt76_wcid *wcid = (struct mt76_wcid *)sta->drv_priv;
393 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
394
395 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
396 if (last)
397 info->flags |= IEEE80211_TX_STATUS_EOSP |
398 IEEE80211_TX_CTL_REQ_TX_STATUS;
399
400 mt76_skb_set_moredata(skb, !last);
401 __mt76_tx_queue_skb(phy, MT_TXQ_PSD, skb, wcid, sta, NULL);
402}
403
404void
405mt76_release_buffered_frames(struct ieee80211_hw *hw, struct ieee80211_sta *sta,
406 u16 tids, int nframes,
407 enum ieee80211_frame_release_type reason,
408 bool more_data)
409{
410 struct mt76_phy *phy = hw->priv;
411 struct mt76_dev *dev = phy->dev;
412 struct sk_buff *last_skb = NULL;
413 struct mt76_queue *hwq = phy->q_tx[MT_TXQ_PSD];
414 int i;
415
416 spin_lock_bh(&hwq->lock);
417 for (i = 0; tids && nframes; i++, tids >>= 1) {
418 struct ieee80211_txq *txq = sta->txq[i];
419 struct mt76_txq *mtxq = (struct mt76_txq *)txq->drv_priv;
420 struct sk_buff *skb;
421
422 if (!(tids & 1))
423 continue;
424
425 do {
426 skb = mt76_txq_dequeue(phy, mtxq);
427 if (!skb)
428 break;
429
430 nframes--;
431 if (last_skb)
432 mt76_queue_ps_skb(phy, sta, last_skb, false);
433
434 last_skb = skb;
435 } while (nframes);
436 }
437
438 if (last_skb) {
439 mt76_queue_ps_skb(phy, sta, last_skb, true);
440 dev->queue_ops->kick(dev, hwq);
441 } else {
442 ieee80211_sta_eosp(sta);
443 }
444
445 spin_unlock_bh(&hwq->lock);
446}
447EXPORT_SYMBOL_GPL(mt76_release_buffered_frames);
448
449static bool
450mt76_txq_stopped(struct mt76_queue *q)
451{
452 return q->stopped || q->blocked ||
453 q->queued + MT_TXQ_FREE_THR >= q->ndesc;
454}
455
456static int
457mt76_txq_send_burst(struct mt76_phy *phy, struct mt76_queue *q,
458 struct mt76_txq *mtxq, struct mt76_wcid *wcid)
459{
460 struct mt76_dev *dev = phy->dev;
461 struct ieee80211_txq *txq = mtxq_to_txq(mtxq);
462 enum mt76_txq_id qid = mt76_txq_get_qid(txq);
463 struct ieee80211_tx_info *info;
464 struct sk_buff *skb;
465 int n_frames = 1;
466 bool stop = false;
467 int idx;
468
469 if (test_bit(MT_WCID_FLAG_PS, &wcid->flags))
470 return 0;
471
472 if (atomic_read(&wcid->non_aql_packets) >= MT_MAX_NON_AQL_PKT)
473 return 0;
474
475 skb = mt76_txq_dequeue(phy, mtxq);
476 if (!skb)
477 return 0;
478
479 info = IEEE80211_SKB_CB(skb);
480 if (!(wcid->tx_info & MT_WCID_TX_INFO_SET))
481 ieee80211_get_tx_rates(txq->vif, txq->sta, skb,
482 info->control.rates, 1);
483
484 spin_lock(&q->lock);
485 idx = __mt76_tx_queue_skb(phy, qid, skb, wcid, txq->sta, &stop);
486 spin_unlock(&q->lock);
487 if (idx < 0)
488 return idx;
489
490 do {
491 if (test_bit(MT76_RESET, &phy->state) || phy->offchannel)
492 return -EBUSY;
493
494 if (stop || mt76_txq_stopped(q))
495 break;
496
497 skb = mt76_txq_dequeue(phy, mtxq);
498 if (!skb)
499 break;
500
501 info = IEEE80211_SKB_CB(skb);
502 if (!(wcid->tx_info & MT_WCID_TX_INFO_SET))
503 ieee80211_get_tx_rates(txq->vif, txq->sta, skb,
504 info->control.rates, 1);
505
506 spin_lock(&q->lock);
507 idx = __mt76_tx_queue_skb(phy, qid, skb, wcid, txq->sta, &stop);
508 spin_unlock(&q->lock);
509 if (idx < 0)
510 break;
511
512 n_frames++;
513 } while (1);
514
515 spin_lock(&q->lock);
516 dev->queue_ops->kick(dev, q);
517 spin_unlock(&q->lock);
518
519 return n_frames;
520}
521
522static int
523mt76_txq_schedule_list(struct mt76_phy *phy, enum mt76_txq_id qid)
524{
525 struct mt76_queue *q = phy->q_tx[qid];
526 struct mt76_dev *dev = phy->dev;
527 struct ieee80211_txq *txq;
528 struct mt76_txq *mtxq;
529 struct mt76_wcid *wcid;
530 int ret = 0;
531
532 while (1) {
533 int n_frames = 0;
534
535 if (test_bit(MT76_RESET, &phy->state) || phy->offchannel)
536 return -EBUSY;
537
538 if (dev->queue_ops->tx_cleanup &&
539 q->queued + 2 * MT_TXQ_FREE_THR >= q->ndesc) {
540 dev->queue_ops->tx_cleanup(dev, q, false);
541 }
542
543 txq = ieee80211_next_txq(phy->hw, qid);
544 if (!txq)
545 break;
546
547 mtxq = (struct mt76_txq *)txq->drv_priv;
548 wcid = rcu_dereference(dev->wcid[mtxq->wcid]);
549 if (!wcid || test_bit(MT_WCID_FLAG_PS, &wcid->flags))
550 continue;
551
552 if (mtxq->send_bar && mtxq->aggr) {
553 struct ieee80211_txq *txq = mtxq_to_txq(mtxq);
554 struct ieee80211_sta *sta = txq->sta;
555 struct ieee80211_vif *vif = txq->vif;
556 u16 agg_ssn = mtxq->agg_ssn;
557 u8 tid = txq->tid;
558
559 mtxq->send_bar = false;
560 ieee80211_send_bar(vif, sta->addr, tid, agg_ssn);
561 }
562
563 if (!mt76_txq_stopped(q))
564 n_frames = mt76_txq_send_burst(phy, q, mtxq, wcid);
565
566 ieee80211_return_txq(phy->hw, txq, false);
567
568 if (unlikely(n_frames < 0))
569 return n_frames;
570
571 ret += n_frames;
572 }
573
574 return ret;
575}
576
577void mt76_txq_schedule(struct mt76_phy *phy, enum mt76_txq_id qid)
578{
579 int len;
580
581 if (qid >= 4 || phy->offchannel)
582 return;
583
584 local_bh_disable();
585 rcu_read_lock();
586
587 do {
588 ieee80211_txq_schedule_start(phy->hw, qid);
589 len = mt76_txq_schedule_list(phy, qid);
590 ieee80211_txq_schedule_end(phy->hw, qid);
591 } while (len > 0);
592
593 rcu_read_unlock();
594 local_bh_enable();
595}
596EXPORT_SYMBOL_GPL(mt76_txq_schedule);
597
598static int
599mt76_txq_schedule_pending_wcid(struct mt76_phy *phy, struct mt76_wcid *wcid,
600 struct sk_buff_head *head)
601{
602 struct mt76_dev *dev = phy->dev;
603 struct ieee80211_sta *sta;
604 struct mt76_queue *q;
605 struct sk_buff *skb;
606 int ret = 0;
607
608 spin_lock(&head->lock);
609 while ((skb = skb_peek(head)) != NULL) {
610 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
611 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
612 int qid = skb_get_queue_mapping(skb);
613
614 if ((dev->drv->drv_flags & MT_DRV_HW_MGMT_TXQ) &&
615 !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) &&
616 !ieee80211_is_data(hdr->frame_control) &&
617 !ieee80211_is_bufferable_mmpdu(skb))
618 qid = MT_TXQ_PSD;
619
620 q = phy->q_tx[qid];
621 if (mt76_txq_stopped(q) || test_bit(MT76_RESET, &phy->state)) {
622 ret = -1;
623 break;
624 }
625
626 __skb_unlink(skb, head);
627 spin_unlock(&head->lock);
628
629 sta = wcid_to_sta(wcid);
630 spin_lock(&q->lock);
631 __mt76_tx_queue_skb(phy, qid, skb, wcid, sta, NULL);
632 dev->queue_ops->kick(dev, q);
633 spin_unlock(&q->lock);
634
635 spin_lock(&head->lock);
636 }
637 spin_unlock(&head->lock);
638
639 return ret;
640}
641
642static void mt76_txq_schedule_pending(struct mt76_phy *phy)
643{
644 LIST_HEAD(tx_list);
645
646 if (list_empty(&phy->tx_list))
647 return;
648
649 local_bh_disable();
650 rcu_read_lock();
651
652 spin_lock(&phy->tx_lock);
653 list_splice_init(&phy->tx_list, &tx_list);
654 while (!list_empty(&tx_list)) {
655 struct mt76_wcid *wcid;
656 int ret;
657
658 wcid = list_first_entry(&tx_list, struct mt76_wcid, tx_list);
659 list_del_init(&wcid->tx_list);
660
661 spin_unlock(&phy->tx_lock);
662 ret = mt76_txq_schedule_pending_wcid(phy, wcid, &wcid->tx_offchannel);
663 if (ret >= 0 && !phy->offchannel)
664 ret = mt76_txq_schedule_pending_wcid(phy, wcid, &wcid->tx_pending);
665 spin_lock(&phy->tx_lock);
666
667 if (!skb_queue_empty(&wcid->tx_pending) &&
668 !skb_queue_empty(&wcid->tx_offchannel) &&
669 list_empty(&wcid->tx_list))
670 list_add_tail(&wcid->tx_list, &phy->tx_list);
671
672 if (ret < 0)
673 break;
674 }
675 spin_unlock(&phy->tx_lock);
676
677 rcu_read_unlock();
678 local_bh_enable();
679}
680
681void mt76_txq_schedule_all(struct mt76_phy *phy)
682{
683 int i;
684
685 mt76_txq_schedule_pending(phy);
686 for (i = 0; i <= MT_TXQ_BK; i++)
687 mt76_txq_schedule(phy, i);
688}
689EXPORT_SYMBOL_GPL(mt76_txq_schedule_all);
690
691void mt76_tx_worker_run(struct mt76_dev *dev)
692{
693 struct mt76_phy *phy;
694 int i;
695
696 for (i = 0; i < ARRAY_SIZE(dev->phys); i++) {
697 phy = dev->phys[i];
698 if (!phy)
699 continue;
700
701 mt76_txq_schedule_all(phy);
702 }
703
704#ifdef CONFIG_NL80211_TESTMODE
705 for (i = 0; i < ARRAY_SIZE(dev->phys); i++) {
706 phy = dev->phys[i];
707 if (!phy || !phy->test.tx_pending)
708 continue;
709
710 mt76_testmode_tx_pending(phy);
711 }
712#endif
713}
714EXPORT_SYMBOL_GPL(mt76_tx_worker_run);
715
716void mt76_tx_worker(struct mt76_worker *w)
717{
718 struct mt76_dev *dev = container_of(w, struct mt76_dev, tx_worker);
719
720 mt76_tx_worker_run(dev);
721}
722
723void mt76_stop_tx_queues(struct mt76_phy *phy, struct ieee80211_sta *sta,
724 bool send_bar)
725{
726 int i;
727
728 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) {
729 struct ieee80211_txq *txq = sta->txq[i];
730 struct mt76_queue *hwq;
731 struct mt76_txq *mtxq;
732
733 if (!txq)
734 continue;
735
736 hwq = phy->q_tx[mt76_txq_get_qid(txq)];
737 mtxq = (struct mt76_txq *)txq->drv_priv;
738
739 spin_lock_bh(&hwq->lock);
740 mtxq->send_bar = mtxq->aggr && send_bar;
741 spin_unlock_bh(&hwq->lock);
742 }
743}
744EXPORT_SYMBOL_GPL(mt76_stop_tx_queues);
745
746void mt76_wake_tx_queue(struct ieee80211_hw *hw, struct ieee80211_txq *txq)
747{
748 struct mt76_phy *phy = hw->priv;
749 struct mt76_dev *dev = phy->dev;
750
751 if (!test_bit(MT76_STATE_RUNNING, &phy->state))
752 return;
753
754 mt76_worker_schedule(&dev->tx_worker);
755}
756EXPORT_SYMBOL_GPL(mt76_wake_tx_queue);
757
758u8 mt76_ac_to_hwq(u8 ac)
759{
760 static const u8 wmm_queue_map[] = {
761 [IEEE80211_AC_BE] = 0,
762 [IEEE80211_AC_BK] = 1,
763 [IEEE80211_AC_VI] = 2,
764 [IEEE80211_AC_VO] = 3,
765 };
766
767 if (WARN_ON(ac >= IEEE80211_NUM_ACS))
768 return 0;
769
770 return wmm_queue_map[ac];
771}
772EXPORT_SYMBOL_GPL(mt76_ac_to_hwq);
773
774int mt76_skb_adjust_pad(struct sk_buff *skb, int pad)
775{
776 struct sk_buff *iter, *last = skb;
777
778 /* First packet of a A-MSDU burst keeps track of the whole burst
779 * length, need to update length of it and the last packet.
780 */
781 skb_walk_frags(skb, iter) {
782 last = iter;
783 if (!iter->next) {
784 skb->data_len += pad;
785 skb->len += pad;
786 break;
787 }
788 }
789
790 if (skb_pad(last, pad))
791 return -ENOMEM;
792
793 __skb_put(last, pad);
794
795 return 0;
796}
797EXPORT_SYMBOL_GPL(mt76_skb_adjust_pad);
798
799void mt76_queue_tx_complete(struct mt76_dev *dev, struct mt76_queue *q,
800 struct mt76_queue_entry *e)
801{
802 if (e->skb)
803 dev->drv->tx_complete_skb(dev, e);
804
805 spin_lock_bh(&q->lock);
806 q->tail = (q->tail + 1) % q->ndesc;
807 q->queued--;
808 spin_unlock_bh(&q->lock);
809}
810EXPORT_SYMBOL_GPL(mt76_queue_tx_complete);
811
812void __mt76_set_tx_blocked(struct mt76_dev *dev, bool blocked)
813{
814 struct mt76_phy *phy = &dev->phy;
815 struct mt76_queue *q = phy->q_tx[0];
816
817 if (blocked == q->blocked)
818 return;
819
820 q->blocked = blocked;
821
822 phy = dev->phys[MT_BAND1];
823 if (phy) {
824 q = phy->q_tx[0];
825 q->blocked = blocked;
826 }
827 phy = dev->phys[MT_BAND2];
828 if (phy) {
829 q = phy->q_tx[0];
830 q->blocked = blocked;
831 }
832
833 if (!blocked)
834 mt76_worker_schedule(&dev->tx_worker);
835}
836EXPORT_SYMBOL_GPL(__mt76_set_tx_blocked);
837
838int mt76_token_consume(struct mt76_dev *dev, struct mt76_txwi_cache **ptxwi)
839{
840 int token;
841
842 spin_lock_bh(&dev->token_lock);
843
844 token = idr_alloc(&dev->token, *ptxwi, 0, dev->token_size, GFP_ATOMIC);
845 if (token >= 0)
846 dev->token_count++;
847
848#ifdef CONFIG_NET_MEDIATEK_SOC_WED
849 if (mtk_wed_device_active(&dev->mmio.wed) &&
850 token >= dev->mmio.wed.wlan.token_start)
851 dev->wed_token_count++;
852#endif
853
854 if (dev->token_count >= dev->token_size - MT76_TOKEN_FREE_THR)
855 __mt76_set_tx_blocked(dev, true);
856
857 spin_unlock_bh(&dev->token_lock);
858
859 return token;
860}
861EXPORT_SYMBOL_GPL(mt76_token_consume);
862
863int mt76_rx_token_consume(struct mt76_dev *dev, void *ptr,
864 struct mt76_txwi_cache *t, dma_addr_t phys)
865{
866 int token;
867
868 spin_lock_bh(&dev->rx_token_lock);
869 token = idr_alloc(&dev->rx_token, t, 0, dev->rx_token_size,
870 GFP_ATOMIC);
871 if (token >= 0) {
872 t->ptr = ptr;
873 t->dma_addr = phys;
874 }
875 spin_unlock_bh(&dev->rx_token_lock);
876
877 return token;
878}
879EXPORT_SYMBOL_GPL(mt76_rx_token_consume);
880
881struct mt76_txwi_cache *
882mt76_token_release(struct mt76_dev *dev, int token, bool *wake)
883{
884 struct mt76_txwi_cache *txwi;
885
886 spin_lock_bh(&dev->token_lock);
887
888 txwi = idr_remove(&dev->token, token);
889 if (txwi) {
890 dev->token_count--;
891
892#ifdef CONFIG_NET_MEDIATEK_SOC_WED
893 if (mtk_wed_device_active(&dev->mmio.wed) &&
894 token >= dev->mmio.wed.wlan.token_start &&
895 --dev->wed_token_count == 0)
896 wake_up(&dev->tx_wait);
897#endif
898 }
899
900 if (dev->token_count < dev->token_size - MT76_TOKEN_FREE_THR &&
901 dev->phy.q_tx[0]->blocked)
902 *wake = true;
903
904 spin_unlock_bh(&dev->token_lock);
905
906 return txwi;
907}
908EXPORT_SYMBOL_GPL(mt76_token_release);
909
910struct mt76_txwi_cache *
911mt76_rx_token_release(struct mt76_dev *dev, int token)
912{
913 struct mt76_txwi_cache *t;
914
915 spin_lock_bh(&dev->rx_token_lock);
916 t = idr_remove(&dev->rx_token, token);
917 spin_unlock_bh(&dev->rx_token_lock);
918
919 return t;
920}
921EXPORT_SYMBOL_GPL(mt76_rx_token_release);
1// SPDX-License-Identifier: ISC
2/*
3 * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
4 */
5
6#include "mt76.h"
7
8static int
9mt76_txq_get_qid(struct ieee80211_txq *txq)
10{
11 if (!txq->sta)
12 return MT_TXQ_BE;
13
14 return txq->ac;
15}
16
17void
18mt76_tx_check_agg_ssn(struct ieee80211_sta *sta, struct sk_buff *skb)
19{
20 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
21 struct ieee80211_txq *txq;
22 struct mt76_txq *mtxq;
23 u8 tid;
24
25 if (!sta || !ieee80211_is_data_qos(hdr->frame_control) ||
26 !ieee80211_is_data_present(hdr->frame_control))
27 return;
28
29 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
30 txq = sta->txq[tid];
31 mtxq = (struct mt76_txq *)txq->drv_priv;
32 if (!mtxq->aggr)
33 return;
34
35 mtxq->agg_ssn = le16_to_cpu(hdr->seq_ctrl) + 0x10;
36}
37EXPORT_SYMBOL_GPL(mt76_tx_check_agg_ssn);
38
39void
40mt76_tx_status_lock(struct mt76_dev *dev, struct sk_buff_head *list)
41 __acquires(&dev->status_lock)
42{
43 __skb_queue_head_init(list);
44 spin_lock_bh(&dev->status_lock);
45}
46EXPORT_SYMBOL_GPL(mt76_tx_status_lock);
47
48void
49mt76_tx_status_unlock(struct mt76_dev *dev, struct sk_buff_head *list)
50 __releases(&dev->status_lock)
51{
52 struct ieee80211_hw *hw;
53 struct sk_buff *skb;
54
55 spin_unlock_bh(&dev->status_lock);
56
57 rcu_read_lock();
58 while ((skb = __skb_dequeue(list)) != NULL) {
59 struct ieee80211_tx_status status = {
60 .skb = skb,
61 .info = IEEE80211_SKB_CB(skb),
62 };
63 struct ieee80211_rate_status rs = {};
64 struct mt76_tx_cb *cb = mt76_tx_skb_cb(skb);
65 struct mt76_wcid *wcid;
66
67 wcid = rcu_dereference(dev->wcid[cb->wcid]);
68 if (wcid) {
69 status.sta = wcid_to_sta(wcid);
70 if (status.sta && (wcid->rate.flags || wcid->rate.legacy)) {
71 rs.rate_idx = wcid->rate;
72 status.rates = &rs;
73 status.n_rates = 1;
74 } else {
75 status.n_rates = 0;
76 }
77 }
78
79 hw = mt76_tx_status_get_hw(dev, skb);
80 ieee80211_tx_status_ext(hw, &status);
81 }
82 rcu_read_unlock();
83}
84EXPORT_SYMBOL_GPL(mt76_tx_status_unlock);
85
86static void
87__mt76_tx_status_skb_done(struct mt76_dev *dev, struct sk_buff *skb, u8 flags,
88 struct sk_buff_head *list)
89{
90 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
91 struct mt76_tx_cb *cb = mt76_tx_skb_cb(skb);
92 u8 done = MT_TX_CB_DMA_DONE | MT_TX_CB_TXS_DONE;
93
94 flags |= cb->flags;
95 cb->flags = flags;
96
97 if ((flags & done) != done)
98 return;
99
100 /* Tx status can be unreliable. if it fails, mark the frame as ACKed */
101 if (flags & MT_TX_CB_TXS_FAILED) {
102 info->status.rates[0].count = 0;
103 info->status.rates[0].idx = -1;
104 info->flags |= IEEE80211_TX_STAT_ACK;
105 }
106
107 __skb_queue_tail(list, skb);
108}
109
110void
111mt76_tx_status_skb_done(struct mt76_dev *dev, struct sk_buff *skb,
112 struct sk_buff_head *list)
113{
114 __mt76_tx_status_skb_done(dev, skb, MT_TX_CB_TXS_DONE, list);
115}
116EXPORT_SYMBOL_GPL(mt76_tx_status_skb_done);
117
118int
119mt76_tx_status_skb_add(struct mt76_dev *dev, struct mt76_wcid *wcid,
120 struct sk_buff *skb)
121{
122 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
123 struct mt76_tx_cb *cb = mt76_tx_skb_cb(skb);
124 int pid;
125
126 memset(cb, 0, sizeof(*cb));
127
128 if (!wcid || !rcu_access_pointer(dev->wcid[wcid->idx]))
129 return MT_PACKET_ID_NO_ACK;
130
131 if (info->flags & IEEE80211_TX_CTL_NO_ACK)
132 return MT_PACKET_ID_NO_ACK;
133
134 if (!(info->flags & (IEEE80211_TX_CTL_REQ_TX_STATUS |
135 IEEE80211_TX_CTL_RATE_CTRL_PROBE)))
136 return MT_PACKET_ID_NO_SKB;
137
138 spin_lock_bh(&dev->status_lock);
139
140 pid = idr_alloc(&wcid->pktid, skb, MT_PACKET_ID_FIRST,
141 MT_PACKET_ID_MASK, GFP_ATOMIC);
142 if (pid < 0) {
143 pid = MT_PACKET_ID_NO_SKB;
144 goto out;
145 }
146
147 cb->wcid = wcid->idx;
148 cb->pktid = pid;
149
150 if (list_empty(&wcid->list))
151 list_add_tail(&wcid->list, &dev->wcid_list);
152
153out:
154 spin_unlock_bh(&dev->status_lock);
155
156 return pid;
157}
158EXPORT_SYMBOL_GPL(mt76_tx_status_skb_add);
159
160struct sk_buff *
161mt76_tx_status_skb_get(struct mt76_dev *dev, struct mt76_wcid *wcid, int pktid,
162 struct sk_buff_head *list)
163{
164 struct sk_buff *skb;
165 int id;
166
167 lockdep_assert_held(&dev->status_lock);
168
169 skb = idr_remove(&wcid->pktid, pktid);
170 if (skb)
171 goto out;
172
173 /* look for stale entries in the wcid idr queue */
174 idr_for_each_entry(&wcid->pktid, skb, id) {
175 struct mt76_tx_cb *cb = mt76_tx_skb_cb(skb);
176
177 if (pktid >= 0) {
178 if (!(cb->flags & MT_TX_CB_DMA_DONE))
179 continue;
180
181 if (time_is_after_jiffies(cb->jiffies +
182 MT_TX_STATUS_SKB_TIMEOUT))
183 continue;
184 }
185
186 /* It has been too long since DMA_DONE, time out this packet
187 * and stop waiting for TXS callback.
188 */
189 idr_remove(&wcid->pktid, cb->pktid);
190 __mt76_tx_status_skb_done(dev, skb, MT_TX_CB_TXS_FAILED |
191 MT_TX_CB_TXS_DONE, list);
192 }
193
194out:
195 if (idr_is_empty(&wcid->pktid))
196 list_del_init(&wcid->list);
197
198 return skb;
199}
200EXPORT_SYMBOL_GPL(mt76_tx_status_skb_get);
201
202void
203mt76_tx_status_check(struct mt76_dev *dev, bool flush)
204{
205 struct mt76_wcid *wcid, *tmp;
206 struct sk_buff_head list;
207
208 mt76_tx_status_lock(dev, &list);
209 list_for_each_entry_safe(wcid, tmp, &dev->wcid_list, list)
210 mt76_tx_status_skb_get(dev, wcid, flush ? -1 : 0, &list);
211 mt76_tx_status_unlock(dev, &list);
212}
213EXPORT_SYMBOL_GPL(mt76_tx_status_check);
214
215static void
216mt76_tx_check_non_aql(struct mt76_dev *dev, struct mt76_wcid *wcid,
217 struct sk_buff *skb)
218{
219 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
220 int pending;
221
222 if (!wcid || info->tx_time_est)
223 return;
224
225 pending = atomic_dec_return(&wcid->non_aql_packets);
226 if (pending < 0)
227 atomic_cmpxchg(&wcid->non_aql_packets, pending, 0);
228}
229
230void __mt76_tx_complete_skb(struct mt76_dev *dev, u16 wcid_idx, struct sk_buff *skb,
231 struct list_head *free_list)
232{
233 struct mt76_tx_cb *cb = mt76_tx_skb_cb(skb);
234 struct ieee80211_tx_status status = {
235 .skb = skb,
236 .free_list = free_list,
237 };
238 struct mt76_wcid *wcid = NULL;
239 struct ieee80211_hw *hw;
240 struct sk_buff_head list;
241
242 rcu_read_lock();
243
244 if (wcid_idx < ARRAY_SIZE(dev->wcid))
245 wcid = rcu_dereference(dev->wcid[wcid_idx]);
246
247 mt76_tx_check_non_aql(dev, wcid, skb);
248
249#ifdef CONFIG_NL80211_TESTMODE
250 if (mt76_is_testmode_skb(dev, skb, &hw)) {
251 struct mt76_phy *phy = hw->priv;
252
253 if (skb == phy->test.tx_skb)
254 phy->test.tx_done++;
255 if (phy->test.tx_queued == phy->test.tx_done)
256 wake_up(&dev->tx_wait);
257
258 dev_kfree_skb_any(skb);
259 goto out;
260 }
261#endif
262
263 if (cb->pktid < MT_PACKET_ID_FIRST) {
264 hw = mt76_tx_status_get_hw(dev, skb);
265 status.sta = wcid_to_sta(wcid);
266 ieee80211_tx_status_ext(hw, &status);
267 goto out;
268 }
269
270 mt76_tx_status_lock(dev, &list);
271 cb->jiffies = jiffies;
272 __mt76_tx_status_skb_done(dev, skb, MT_TX_CB_DMA_DONE, &list);
273 mt76_tx_status_unlock(dev, &list);
274
275out:
276 rcu_read_unlock();
277}
278EXPORT_SYMBOL_GPL(__mt76_tx_complete_skb);
279
280static int
281__mt76_tx_queue_skb(struct mt76_phy *phy, int qid, struct sk_buff *skb,
282 struct mt76_wcid *wcid, struct ieee80211_sta *sta,
283 bool *stop)
284{
285 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
286 struct mt76_queue *q = phy->q_tx[qid];
287 struct mt76_dev *dev = phy->dev;
288 bool non_aql;
289 int pending;
290 int idx;
291
292 non_aql = !info->tx_time_est;
293 idx = dev->queue_ops->tx_queue_skb(dev, q, qid, skb, wcid, sta);
294 if (idx < 0 || !sta)
295 return idx;
296
297 wcid = (struct mt76_wcid *)sta->drv_priv;
298 q->entry[idx].wcid = wcid->idx;
299
300 if (!non_aql)
301 return idx;
302
303 pending = atomic_inc_return(&wcid->non_aql_packets);
304 if (stop && pending >= MT_MAX_NON_AQL_PKT)
305 *stop = true;
306
307 return idx;
308}
309
310void
311mt76_tx(struct mt76_phy *phy, struct ieee80211_sta *sta,
312 struct mt76_wcid *wcid, struct sk_buff *skb)
313{
314 struct mt76_dev *dev = phy->dev;
315 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
316 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
317 struct mt76_queue *q;
318 int qid = skb_get_queue_mapping(skb);
319
320 if (mt76_testmode_enabled(phy)) {
321 ieee80211_free_txskb(phy->hw, skb);
322 return;
323 }
324
325 if (WARN_ON(qid >= MT_TXQ_PSD)) {
326 qid = MT_TXQ_BE;
327 skb_set_queue_mapping(skb, qid);
328 }
329
330 if ((dev->drv->drv_flags & MT_DRV_HW_MGMT_TXQ) &&
331 !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) &&
332 !ieee80211_is_data(hdr->frame_control) &&
333 !ieee80211_is_bufferable_mmpdu(hdr->frame_control)) {
334 qid = MT_TXQ_PSD;
335 }
336
337 if (wcid && !(wcid->tx_info & MT_WCID_TX_INFO_SET))
338 ieee80211_get_tx_rates(info->control.vif, sta, skb,
339 info->control.rates, 1);
340
341 info->hw_queue |= FIELD_PREP(MT_TX_HW_QUEUE_PHY, phy->band_idx);
342 q = phy->q_tx[qid];
343
344 spin_lock_bh(&q->lock);
345 __mt76_tx_queue_skb(phy, qid, skb, wcid, sta, NULL);
346 dev->queue_ops->kick(dev, q);
347 spin_unlock_bh(&q->lock);
348}
349EXPORT_SYMBOL_GPL(mt76_tx);
350
351static struct sk_buff *
352mt76_txq_dequeue(struct mt76_phy *phy, struct mt76_txq *mtxq)
353{
354 struct ieee80211_txq *txq = mtxq_to_txq(mtxq);
355 struct ieee80211_tx_info *info;
356 struct sk_buff *skb;
357
358 skb = ieee80211_tx_dequeue(phy->hw, txq);
359 if (!skb)
360 return NULL;
361
362 info = IEEE80211_SKB_CB(skb);
363 info->hw_queue |= FIELD_PREP(MT_TX_HW_QUEUE_PHY, phy->band_idx);
364
365 return skb;
366}
367
368static void
369mt76_queue_ps_skb(struct mt76_phy *phy, struct ieee80211_sta *sta,
370 struct sk_buff *skb, bool last)
371{
372 struct mt76_wcid *wcid = (struct mt76_wcid *)sta->drv_priv;
373 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
374
375 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
376 if (last)
377 info->flags |= IEEE80211_TX_STATUS_EOSP |
378 IEEE80211_TX_CTL_REQ_TX_STATUS;
379
380 mt76_skb_set_moredata(skb, !last);
381 __mt76_tx_queue_skb(phy, MT_TXQ_PSD, skb, wcid, sta, NULL);
382}
383
384void
385mt76_release_buffered_frames(struct ieee80211_hw *hw, struct ieee80211_sta *sta,
386 u16 tids, int nframes,
387 enum ieee80211_frame_release_type reason,
388 bool more_data)
389{
390 struct mt76_phy *phy = hw->priv;
391 struct mt76_dev *dev = phy->dev;
392 struct sk_buff *last_skb = NULL;
393 struct mt76_queue *hwq = phy->q_tx[MT_TXQ_PSD];
394 int i;
395
396 spin_lock_bh(&hwq->lock);
397 for (i = 0; tids && nframes; i++, tids >>= 1) {
398 struct ieee80211_txq *txq = sta->txq[i];
399 struct mt76_txq *mtxq = (struct mt76_txq *)txq->drv_priv;
400 struct sk_buff *skb;
401
402 if (!(tids & 1))
403 continue;
404
405 do {
406 skb = mt76_txq_dequeue(phy, mtxq);
407 if (!skb)
408 break;
409
410 nframes--;
411 if (last_skb)
412 mt76_queue_ps_skb(phy, sta, last_skb, false);
413
414 last_skb = skb;
415 } while (nframes);
416 }
417
418 if (last_skb) {
419 mt76_queue_ps_skb(phy, sta, last_skb, true);
420 dev->queue_ops->kick(dev, hwq);
421 } else {
422 ieee80211_sta_eosp(sta);
423 }
424
425 spin_unlock_bh(&hwq->lock);
426}
427EXPORT_SYMBOL_GPL(mt76_release_buffered_frames);
428
429static bool
430mt76_txq_stopped(struct mt76_queue *q)
431{
432 return q->stopped || q->blocked ||
433 q->queued + MT_TXQ_FREE_THR >= q->ndesc;
434}
435
436static int
437mt76_txq_send_burst(struct mt76_phy *phy, struct mt76_queue *q,
438 struct mt76_txq *mtxq, struct mt76_wcid *wcid)
439{
440 struct mt76_dev *dev = phy->dev;
441 struct ieee80211_txq *txq = mtxq_to_txq(mtxq);
442 enum mt76_txq_id qid = mt76_txq_get_qid(txq);
443 struct ieee80211_tx_info *info;
444 struct sk_buff *skb;
445 int n_frames = 1;
446 bool stop = false;
447 int idx;
448
449 if (test_bit(MT_WCID_FLAG_PS, &wcid->flags))
450 return 0;
451
452 if (atomic_read(&wcid->non_aql_packets) >= MT_MAX_NON_AQL_PKT)
453 return 0;
454
455 skb = mt76_txq_dequeue(phy, mtxq);
456 if (!skb)
457 return 0;
458
459 info = IEEE80211_SKB_CB(skb);
460 if (!(wcid->tx_info & MT_WCID_TX_INFO_SET))
461 ieee80211_get_tx_rates(txq->vif, txq->sta, skb,
462 info->control.rates, 1);
463
464 spin_lock(&q->lock);
465 idx = __mt76_tx_queue_skb(phy, qid, skb, wcid, txq->sta, &stop);
466 spin_unlock(&q->lock);
467 if (idx < 0)
468 return idx;
469
470 do {
471 if (test_bit(MT76_RESET, &phy->state))
472 return -EBUSY;
473
474 if (stop || mt76_txq_stopped(q))
475 break;
476
477 skb = mt76_txq_dequeue(phy, mtxq);
478 if (!skb)
479 break;
480
481 info = IEEE80211_SKB_CB(skb);
482 if (!(wcid->tx_info & MT_WCID_TX_INFO_SET))
483 ieee80211_get_tx_rates(txq->vif, txq->sta, skb,
484 info->control.rates, 1);
485
486 spin_lock(&q->lock);
487 idx = __mt76_tx_queue_skb(phy, qid, skb, wcid, txq->sta, &stop);
488 spin_unlock(&q->lock);
489 if (idx < 0)
490 break;
491
492 n_frames++;
493 } while (1);
494
495 spin_lock(&q->lock);
496 dev->queue_ops->kick(dev, q);
497 spin_unlock(&q->lock);
498
499 return n_frames;
500}
501
502static int
503mt76_txq_schedule_list(struct mt76_phy *phy, enum mt76_txq_id qid)
504{
505 struct mt76_queue *q = phy->q_tx[qid];
506 struct mt76_dev *dev = phy->dev;
507 struct ieee80211_txq *txq;
508 struct mt76_txq *mtxq;
509 struct mt76_wcid *wcid;
510 int ret = 0;
511
512 while (1) {
513 int n_frames = 0;
514
515 if (test_bit(MT76_RESET, &phy->state))
516 return -EBUSY;
517
518 if (dev->queue_ops->tx_cleanup &&
519 q->queued + 2 * MT_TXQ_FREE_THR >= q->ndesc) {
520 dev->queue_ops->tx_cleanup(dev, q, false);
521 }
522
523 txq = ieee80211_next_txq(phy->hw, qid);
524 if (!txq)
525 break;
526
527 mtxq = (struct mt76_txq *)txq->drv_priv;
528 wcid = rcu_dereference(dev->wcid[mtxq->wcid]);
529 if (!wcid || test_bit(MT_WCID_FLAG_PS, &wcid->flags))
530 continue;
531
532 if (mtxq->send_bar && mtxq->aggr) {
533 struct ieee80211_txq *txq = mtxq_to_txq(mtxq);
534 struct ieee80211_sta *sta = txq->sta;
535 struct ieee80211_vif *vif = txq->vif;
536 u16 agg_ssn = mtxq->agg_ssn;
537 u8 tid = txq->tid;
538
539 mtxq->send_bar = false;
540 ieee80211_send_bar(vif, sta->addr, tid, agg_ssn);
541 }
542
543 if (!mt76_txq_stopped(q))
544 n_frames = mt76_txq_send_burst(phy, q, mtxq, wcid);
545
546 ieee80211_return_txq(phy->hw, txq, false);
547
548 if (unlikely(n_frames < 0))
549 return n_frames;
550
551 ret += n_frames;
552 }
553
554 return ret;
555}
556
557void mt76_txq_schedule(struct mt76_phy *phy, enum mt76_txq_id qid)
558{
559 int len;
560
561 if (qid >= 4)
562 return;
563
564 local_bh_disable();
565 rcu_read_lock();
566
567 do {
568 ieee80211_txq_schedule_start(phy->hw, qid);
569 len = mt76_txq_schedule_list(phy, qid);
570 ieee80211_txq_schedule_end(phy->hw, qid);
571 } while (len > 0);
572
573 rcu_read_unlock();
574 local_bh_enable();
575}
576EXPORT_SYMBOL_GPL(mt76_txq_schedule);
577
578void mt76_txq_schedule_all(struct mt76_phy *phy)
579{
580 int i;
581
582 for (i = 0; i <= MT_TXQ_BK; i++)
583 mt76_txq_schedule(phy, i);
584}
585EXPORT_SYMBOL_GPL(mt76_txq_schedule_all);
586
587void mt76_tx_worker_run(struct mt76_dev *dev)
588{
589 struct mt76_phy *phy;
590 int i;
591
592 for (i = 0; i < ARRAY_SIZE(dev->phys); i++) {
593 phy = dev->phys[i];
594 if (!phy)
595 continue;
596
597 mt76_txq_schedule_all(phy);
598 }
599
600#ifdef CONFIG_NL80211_TESTMODE
601 for (i = 0; i < ARRAY_SIZE(dev->phys); i++) {
602 phy = dev->phys[i];
603 if (!phy || !phy->test.tx_pending)
604 continue;
605
606 mt76_testmode_tx_pending(phy);
607 }
608#endif
609}
610EXPORT_SYMBOL_GPL(mt76_tx_worker_run);
611
612void mt76_tx_worker(struct mt76_worker *w)
613{
614 struct mt76_dev *dev = container_of(w, struct mt76_dev, tx_worker);
615
616 mt76_tx_worker_run(dev);
617}
618
619void mt76_stop_tx_queues(struct mt76_phy *phy, struct ieee80211_sta *sta,
620 bool send_bar)
621{
622 int i;
623
624 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) {
625 struct ieee80211_txq *txq = sta->txq[i];
626 struct mt76_queue *hwq;
627 struct mt76_txq *mtxq;
628
629 if (!txq)
630 continue;
631
632 hwq = phy->q_tx[mt76_txq_get_qid(txq)];
633 mtxq = (struct mt76_txq *)txq->drv_priv;
634
635 spin_lock_bh(&hwq->lock);
636 mtxq->send_bar = mtxq->aggr && send_bar;
637 spin_unlock_bh(&hwq->lock);
638 }
639}
640EXPORT_SYMBOL_GPL(mt76_stop_tx_queues);
641
642void mt76_wake_tx_queue(struct ieee80211_hw *hw, struct ieee80211_txq *txq)
643{
644 struct mt76_phy *phy = hw->priv;
645 struct mt76_dev *dev = phy->dev;
646
647 if (!test_bit(MT76_STATE_RUNNING, &phy->state))
648 return;
649
650 mt76_worker_schedule(&dev->tx_worker);
651}
652EXPORT_SYMBOL_GPL(mt76_wake_tx_queue);
653
654u8 mt76_ac_to_hwq(u8 ac)
655{
656 static const u8 wmm_queue_map[] = {
657 [IEEE80211_AC_BE] = 0,
658 [IEEE80211_AC_BK] = 1,
659 [IEEE80211_AC_VI] = 2,
660 [IEEE80211_AC_VO] = 3,
661 };
662
663 if (WARN_ON(ac >= IEEE80211_NUM_ACS))
664 return 0;
665
666 return wmm_queue_map[ac];
667}
668EXPORT_SYMBOL_GPL(mt76_ac_to_hwq);
669
670int mt76_skb_adjust_pad(struct sk_buff *skb, int pad)
671{
672 struct sk_buff *iter, *last = skb;
673
674 /* First packet of a A-MSDU burst keeps track of the whole burst
675 * length, need to update length of it and the last packet.
676 */
677 skb_walk_frags(skb, iter) {
678 last = iter;
679 if (!iter->next) {
680 skb->data_len += pad;
681 skb->len += pad;
682 break;
683 }
684 }
685
686 if (skb_pad(last, pad))
687 return -ENOMEM;
688
689 __skb_put(last, pad);
690
691 return 0;
692}
693EXPORT_SYMBOL_GPL(mt76_skb_adjust_pad);
694
695void mt76_queue_tx_complete(struct mt76_dev *dev, struct mt76_queue *q,
696 struct mt76_queue_entry *e)
697{
698 if (e->skb)
699 dev->drv->tx_complete_skb(dev, e);
700
701 spin_lock_bh(&q->lock);
702 q->tail = (q->tail + 1) % q->ndesc;
703 q->queued--;
704 spin_unlock_bh(&q->lock);
705}
706EXPORT_SYMBOL_GPL(mt76_queue_tx_complete);
707
708void __mt76_set_tx_blocked(struct mt76_dev *dev, bool blocked)
709{
710 struct mt76_phy *phy = &dev->phy;
711 struct mt76_queue *q = phy->q_tx[0];
712
713 if (blocked == q->blocked)
714 return;
715
716 q->blocked = blocked;
717
718 phy = dev->phys[MT_BAND1];
719 if (phy) {
720 q = phy->q_tx[0];
721 q->blocked = blocked;
722 }
723 phy = dev->phys[MT_BAND2];
724 if (phy) {
725 q = phy->q_tx[0];
726 q->blocked = blocked;
727 }
728
729 if (!blocked)
730 mt76_worker_schedule(&dev->tx_worker);
731}
732EXPORT_SYMBOL_GPL(__mt76_set_tx_blocked);
733
734int mt76_token_consume(struct mt76_dev *dev, struct mt76_txwi_cache **ptxwi)
735{
736 int token;
737
738 spin_lock_bh(&dev->token_lock);
739
740 token = idr_alloc(&dev->token, *ptxwi, 0, dev->token_size, GFP_ATOMIC);
741 if (token >= 0)
742 dev->token_count++;
743
744#ifdef CONFIG_NET_MEDIATEK_SOC_WED
745 if (mtk_wed_device_active(&dev->mmio.wed) &&
746 token >= dev->mmio.wed.wlan.token_start)
747 dev->wed_token_count++;
748#endif
749
750 if (dev->token_count >= dev->token_size - MT76_TOKEN_FREE_THR)
751 __mt76_set_tx_blocked(dev, true);
752
753 spin_unlock_bh(&dev->token_lock);
754
755 return token;
756}
757EXPORT_SYMBOL_GPL(mt76_token_consume);
758
759int mt76_rx_token_consume(struct mt76_dev *dev, void *ptr,
760 struct mt76_txwi_cache *t, dma_addr_t phys)
761{
762 int token;
763
764 spin_lock_bh(&dev->rx_token_lock);
765 token = idr_alloc(&dev->rx_token, t, 0, dev->rx_token_size,
766 GFP_ATOMIC);
767 if (token >= 0) {
768 t->ptr = ptr;
769 t->dma_addr = phys;
770 }
771 spin_unlock_bh(&dev->rx_token_lock);
772
773 return token;
774}
775EXPORT_SYMBOL_GPL(mt76_rx_token_consume);
776
777struct mt76_txwi_cache *
778mt76_token_release(struct mt76_dev *dev, int token, bool *wake)
779{
780 struct mt76_txwi_cache *txwi;
781
782 spin_lock_bh(&dev->token_lock);
783
784 txwi = idr_remove(&dev->token, token);
785 if (txwi) {
786 dev->token_count--;
787
788#ifdef CONFIG_NET_MEDIATEK_SOC_WED
789 if (mtk_wed_device_active(&dev->mmio.wed) &&
790 token >= dev->mmio.wed.wlan.token_start &&
791 --dev->wed_token_count == 0)
792 wake_up(&dev->tx_wait);
793#endif
794 }
795
796 if (dev->token_count < dev->token_size - MT76_TOKEN_FREE_THR &&
797 dev->phy.q_tx[0]->blocked)
798 *wake = true;
799
800 spin_unlock_bh(&dev->token_lock);
801
802 return txwi;
803}
804EXPORT_SYMBOL_GPL(mt76_token_release);
805
806struct mt76_txwi_cache *
807mt76_rx_token_release(struct mt76_dev *dev, int token)
808{
809 struct mt76_txwi_cache *t;
810
811 spin_lock_bh(&dev->rx_token_lock);
812 t = idr_remove(&dev->rx_token, token);
813 spin_unlock_bh(&dev->rx_token_lock);
814
815 return t;
816}
817EXPORT_SYMBOL_GPL(mt76_rx_token_release);