1 // SPDX-License-Identifier: ISC
2 /*
3 * Copyright (C) 2016 Felix Fietkau <[email protected]>
4 */
5
6 #include "mt76.h"
7
8 static int
mt76_txq_get_qid(struct ieee80211_txq * txq)9 mt76_txq_get_qid(struct ieee80211_txq *txq)
10 {
11 if (!txq->sta)
12 return MT_TXQ_BE;
13
14 return txq->ac;
15 }
16
17 void
mt76_tx_check_agg_ssn(struct ieee80211_sta * sta,struct sk_buff * skb)18 mt76_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 }
37 EXPORT_SYMBOL_GPL(mt76_tx_check_agg_ssn);
38
39 void
mt76_tx_status_lock(struct mt76_dev * dev,struct sk_buff_head * list)40 mt76_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 }
46 EXPORT_SYMBOL_GPL(mt76_tx_status_lock);
47
48 void
mt76_tx_status_unlock(struct mt76_dev * dev,struct sk_buff_head * list)49 mt76_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 }
86 EXPORT_SYMBOL_GPL(mt76_tx_status_unlock);
87
88 static void
__mt76_tx_status_skb_done(struct mt76_dev * dev,struct sk_buff * skb,u8 flags,struct sk_buff_head * list)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
112 void
mt76_tx_status_skb_done(struct mt76_dev * dev,struct sk_buff * skb,struct sk_buff_head * list)113 mt76_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 }
118 EXPORT_SYMBOL_GPL(mt76_tx_status_skb_done);
119
120 int
mt76_tx_status_skb_add(struct mt76_dev * dev,struct mt76_wcid * wcid,struct sk_buff * skb)121 mt76_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
162 out:
163 spin_unlock_bh(&dev->status_lock);
164
165 return pid;
166 }
167 EXPORT_SYMBOL_GPL(mt76_tx_status_skb_add);
168
169 struct sk_buff *
mt76_tx_status_skb_get(struct mt76_dev * dev,struct mt76_wcid * wcid,int pktid,struct sk_buff_head * list)170 mt76_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
203 out:
204 if (idr_is_empty(&wcid->pktid))
205 list_del_init(&wcid->list);
206
207 return skb;
208 }
209 EXPORT_SYMBOL_GPL(mt76_tx_status_skb_get);
210
211 void
mt76_tx_status_check(struct mt76_dev * dev,bool flush)212 mt76_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 }
222 EXPORT_SYMBOL_GPL(mt76_tx_status_check);
223
224 static void
mt76_tx_check_non_aql(struct mt76_dev * dev,struct mt76_wcid * wcid,struct sk_buff * skb)225 mt76_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
__mt76_tx_complete_skb(struct mt76_dev * dev,u16 wcid_idx,struct sk_buff * skb,struct list_head * free_list)239 void __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
293 out:
294 rcu_read_unlock();
295 }
296 EXPORT_SYMBOL_GPL(__mt76_tx_complete_skb);
297
298 static int
__mt76_tx_queue_skb(struct mt76_phy * phy,int qid,struct sk_buff * skb,struct mt76_wcid * wcid,struct ieee80211_sta * sta,bool * stop)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
331 void
mt76_tx(struct mt76_phy * phy,struct ieee80211_sta * sta,struct mt76_wcid * wcid,struct sk_buff * skb)332 mt76_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 }
369 EXPORT_SYMBOL_GPL(mt76_tx);
370
371 static struct sk_buff *
mt76_txq_dequeue(struct mt76_phy * phy,struct mt76_txq * mtxq)372 mt76_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
388 static void
mt76_queue_ps_skb(struct mt76_phy * phy,struct ieee80211_sta * sta,struct sk_buff * skb,bool last)389 mt76_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
404 void
mt76_release_buffered_frames(struct ieee80211_hw * hw,struct ieee80211_sta * sta,u16 tids,int nframes,enum ieee80211_frame_release_type reason,bool more_data)405 mt76_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 }
447 EXPORT_SYMBOL_GPL(mt76_release_buffered_frames);
448
449 static bool
mt76_txq_stopped(struct mt76_queue * q)450 mt76_txq_stopped(struct mt76_queue *q)
451 {
452 return q->stopped || q->blocked ||
453 q->queued + MT_TXQ_FREE_THR >= q->ndesc;
454 }
455
456 static int
mt76_txq_send_burst(struct mt76_phy * phy,struct mt76_queue * q,struct mt76_txq * mtxq,struct mt76_wcid * wcid)457 mt76_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 break;
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
522 static int
mt76_txq_schedule_list(struct mt76_phy * phy,enum mt76_txq_id qid)523 mt76_txq_schedule_list(struct mt76_phy *phy, enum mt76_txq_id qid)
524 {
525 struct mt76_dev *dev = phy->dev;
526 struct ieee80211_txq *txq;
527 struct mt76_txq *mtxq;
528 struct mt76_wcid *wcid;
529 struct mt76_queue *q;
530 int ret = 0;
531
532 while (1) {
533 int n_frames = 0;
534
535 txq = ieee80211_next_txq(phy->hw, qid);
536 if (!txq)
537 break;
538
539 mtxq = (struct mt76_txq *)txq->drv_priv;
540 wcid = rcu_dereference(dev->wcid[mtxq->wcid]);
541 if (!wcid || test_bit(MT_WCID_FLAG_PS, &wcid->flags))
542 continue;
543
544 phy = mt76_dev_phy(dev, wcid->phy_idx);
545 if (test_bit(MT76_RESET, &phy->state) || phy->offchannel)
546 continue;
547
548 q = phy->q_tx[qid];
549 if (dev->queue_ops->tx_cleanup &&
550 q->queued + 2 * MT_TXQ_FREE_THR >= q->ndesc) {
551 dev->queue_ops->tx_cleanup(dev, q, false);
552 }
553
554 if (mtxq->send_bar && mtxq->aggr) {
555 struct ieee80211_txq *txq = mtxq_to_txq(mtxq);
556 struct ieee80211_sta *sta = txq->sta;
557 struct ieee80211_vif *vif = txq->vif;
558 u16 agg_ssn = mtxq->agg_ssn;
559 u8 tid = txq->tid;
560
561 mtxq->send_bar = false;
562 ieee80211_send_bar(vif, sta->addr, tid, agg_ssn);
563 }
564
565 if (!mt76_txq_stopped(q))
566 n_frames = mt76_txq_send_burst(phy, q, mtxq, wcid);
567
568 ieee80211_return_txq(phy->hw, txq, false);
569
570 if (unlikely(n_frames < 0))
571 return n_frames;
572
573 ret += n_frames;
574 }
575
576 return ret;
577 }
578
mt76_txq_schedule(struct mt76_phy * phy,enum mt76_txq_id qid)579 void mt76_txq_schedule(struct mt76_phy *phy, enum mt76_txq_id qid)
580 {
581 int len;
582
583 if (qid >= 4)
584 return;
585
586 local_bh_disable();
587 rcu_read_lock();
588
589 do {
590 ieee80211_txq_schedule_start(phy->hw, qid);
591 len = mt76_txq_schedule_list(phy, qid);
592 ieee80211_txq_schedule_end(phy->hw, qid);
593 } while (len > 0);
594
595 rcu_read_unlock();
596 local_bh_enable();
597 }
598 EXPORT_SYMBOL_GPL(mt76_txq_schedule);
599
600 static int
mt76_txq_schedule_pending_wcid(struct mt76_phy * phy,struct mt76_wcid * wcid,struct sk_buff_head * head)601 mt76_txq_schedule_pending_wcid(struct mt76_phy *phy, struct mt76_wcid *wcid,
602 struct sk_buff_head *head)
603 {
604 struct mt76_dev *dev = phy->dev;
605 struct ieee80211_sta *sta;
606 struct mt76_queue *q;
607 struct sk_buff *skb;
608 int ret = 0;
609
610 spin_lock(&head->lock);
611 while ((skb = skb_peek(head)) != NULL) {
612 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
613 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
614 int qid = skb_get_queue_mapping(skb);
615
616 if ((dev->drv->drv_flags & MT_DRV_HW_MGMT_TXQ) &&
617 !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) &&
618 !ieee80211_is_data(hdr->frame_control) &&
619 !ieee80211_is_bufferable_mmpdu(skb))
620 qid = MT_TXQ_PSD;
621
622 q = phy->q_tx[qid];
623 if (mt76_txq_stopped(q) || test_bit(MT76_RESET, &phy->state)) {
624 ret = -1;
625 break;
626 }
627
628 __skb_unlink(skb, head);
629 spin_unlock(&head->lock);
630
631 sta = wcid_to_sta(wcid);
632 spin_lock(&q->lock);
633 __mt76_tx_queue_skb(phy, qid, skb, wcid, sta, NULL);
634 dev->queue_ops->kick(dev, q);
635 spin_unlock(&q->lock);
636
637 spin_lock(&head->lock);
638 }
639 spin_unlock(&head->lock);
640
641 return ret;
642 }
643
mt76_txq_schedule_pending(struct mt76_phy * phy)644 static void mt76_txq_schedule_pending(struct mt76_phy *phy)
645 {
646 LIST_HEAD(tx_list);
647
648 if (list_empty(&phy->tx_list))
649 return;
650
651 local_bh_disable();
652 rcu_read_lock();
653
654 spin_lock(&phy->tx_lock);
655 list_splice_init(&phy->tx_list, &tx_list);
656 while (!list_empty(&tx_list)) {
657 struct mt76_wcid *wcid;
658 int ret;
659
660 wcid = list_first_entry(&tx_list, struct mt76_wcid, tx_list);
661 list_del_init(&wcid->tx_list);
662
663 spin_unlock(&phy->tx_lock);
664 ret = mt76_txq_schedule_pending_wcid(phy, wcid, &wcid->tx_offchannel);
665 if (ret >= 0 && !phy->offchannel)
666 ret = mt76_txq_schedule_pending_wcid(phy, wcid, &wcid->tx_pending);
667 spin_lock(&phy->tx_lock);
668
669 if (!skb_queue_empty(&wcid->tx_pending) &&
670 !skb_queue_empty(&wcid->tx_offchannel) &&
671 list_empty(&wcid->tx_list))
672 list_add_tail(&wcid->tx_list, &phy->tx_list);
673
674 if (ret < 0)
675 break;
676 }
677 spin_unlock(&phy->tx_lock);
678
679 rcu_read_unlock();
680 local_bh_enable();
681 }
682
mt76_txq_schedule_all(struct mt76_phy * phy)683 void mt76_txq_schedule_all(struct mt76_phy *phy)
684 {
685 struct mt76_phy *main_phy = &phy->dev->phy;
686 int i;
687
688 mt76_txq_schedule_pending(phy);
689
690 if (phy != main_phy && phy->hw == main_phy->hw)
691 return;
692
693 for (i = 0; i <= MT_TXQ_BK; i++)
694 mt76_txq_schedule(phy, i);
695 }
696 EXPORT_SYMBOL_GPL(mt76_txq_schedule_all);
697
mt76_tx_worker_run(struct mt76_dev * dev)698 void mt76_tx_worker_run(struct mt76_dev *dev)
699 {
700 struct mt76_phy *phy;
701 int i;
702
703 mt76_txq_schedule_all(&dev->phy);
704 for (i = 0; i < ARRAY_SIZE(dev->phys); i++) {
705 phy = dev->phys[i];
706 if (!phy)
707 continue;
708
709 mt76_txq_schedule_all(phy);
710 }
711
712 #ifdef CONFIG_NL80211_TESTMODE
713 for (i = 0; i < ARRAY_SIZE(dev->phys); i++) {
714 phy = dev->phys[i];
715 if (!phy || !phy->test.tx_pending)
716 continue;
717
718 mt76_testmode_tx_pending(phy);
719 }
720 #endif
721 }
722 EXPORT_SYMBOL_GPL(mt76_tx_worker_run);
723
mt76_tx_worker(struct mt76_worker * w)724 void mt76_tx_worker(struct mt76_worker *w)
725 {
726 struct mt76_dev *dev = container_of(w, struct mt76_dev, tx_worker);
727
728 mt76_tx_worker_run(dev);
729 }
730
mt76_stop_tx_queues(struct mt76_phy * phy,struct ieee80211_sta * sta,bool send_bar)731 void mt76_stop_tx_queues(struct mt76_phy *phy, struct ieee80211_sta *sta,
732 bool send_bar)
733 {
734 int i;
735
736 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) {
737 struct ieee80211_txq *txq = sta->txq[i];
738 struct mt76_queue *hwq;
739 struct mt76_txq *mtxq;
740
741 if (!txq)
742 continue;
743
744 hwq = phy->q_tx[mt76_txq_get_qid(txq)];
745 mtxq = (struct mt76_txq *)txq->drv_priv;
746
747 spin_lock_bh(&hwq->lock);
748 mtxq->send_bar = mtxq->aggr && send_bar;
749 spin_unlock_bh(&hwq->lock);
750 }
751 }
752 EXPORT_SYMBOL_GPL(mt76_stop_tx_queues);
753
mt76_wake_tx_queue(struct ieee80211_hw * hw,struct ieee80211_txq * txq)754 void mt76_wake_tx_queue(struct ieee80211_hw *hw, struct ieee80211_txq *txq)
755 {
756 struct mt76_phy *phy = hw->priv;
757 struct mt76_dev *dev = phy->dev;
758
759 mt76_worker_schedule(&dev->tx_worker);
760 }
761 EXPORT_SYMBOL_GPL(mt76_wake_tx_queue);
762
mt76_ac_to_hwq(u8 ac)763 u8 mt76_ac_to_hwq(u8 ac)
764 {
765 static const u8 wmm_queue_map[] = {
766 [IEEE80211_AC_BE] = 0,
767 [IEEE80211_AC_BK] = 1,
768 [IEEE80211_AC_VI] = 2,
769 [IEEE80211_AC_VO] = 3,
770 };
771
772 if (WARN_ON(ac >= IEEE80211_NUM_ACS))
773 return 0;
774
775 return wmm_queue_map[ac];
776 }
777 EXPORT_SYMBOL_GPL(mt76_ac_to_hwq);
778
mt76_skb_adjust_pad(struct sk_buff * skb,int pad)779 int mt76_skb_adjust_pad(struct sk_buff *skb, int pad)
780 {
781 struct sk_buff *iter, *last = skb;
782
783 /* First packet of a A-MSDU burst keeps track of the whole burst
784 * length, need to update length of it and the last packet.
785 */
786 skb_walk_frags(skb, iter) {
787 last = iter;
788 if (!iter->next) {
789 skb->data_len += pad;
790 skb->len += pad;
791 break;
792 }
793 }
794
795 if (skb_pad(last, pad))
796 return -ENOMEM;
797
798 __skb_put(last, pad);
799
800 return 0;
801 }
802 EXPORT_SYMBOL_GPL(mt76_skb_adjust_pad);
803
mt76_queue_tx_complete(struct mt76_dev * dev,struct mt76_queue * q,struct mt76_queue_entry * e)804 void mt76_queue_tx_complete(struct mt76_dev *dev, struct mt76_queue *q,
805 struct mt76_queue_entry *e)
806 {
807 if (e->skb)
808 dev->drv->tx_complete_skb(dev, e);
809
810 spin_lock_bh(&q->lock);
811 q->tail = (q->tail + 1) % q->ndesc;
812 q->queued--;
813 spin_unlock_bh(&q->lock);
814 }
815 EXPORT_SYMBOL_GPL(mt76_queue_tx_complete);
816
__mt76_set_tx_blocked(struct mt76_dev * dev,bool blocked)817 void __mt76_set_tx_blocked(struct mt76_dev *dev, bool blocked)
818 {
819 struct mt76_phy *phy = &dev->phy;
820 struct mt76_queue *q = phy->q_tx[0];
821
822 if (blocked == q->blocked)
823 return;
824
825 q->blocked = blocked;
826
827 phy = dev->phys[MT_BAND1];
828 if (phy) {
829 q = phy->q_tx[0];
830 q->blocked = blocked;
831 }
832 phy = dev->phys[MT_BAND2];
833 if (phy) {
834 q = phy->q_tx[0];
835 q->blocked = blocked;
836 }
837
838 if (!blocked)
839 mt76_worker_schedule(&dev->tx_worker);
840 }
841 EXPORT_SYMBOL_GPL(__mt76_set_tx_blocked);
842
mt76_token_consume(struct mt76_dev * dev,struct mt76_txwi_cache ** ptxwi)843 int mt76_token_consume(struct mt76_dev *dev, struct mt76_txwi_cache **ptxwi)
844 {
845 int token;
846
847 spin_lock_bh(&dev->token_lock);
848
849 token = idr_alloc(&dev->token, *ptxwi, 0, dev->token_size, GFP_ATOMIC);
850 if (token >= 0)
851 dev->token_count++;
852
853 #ifdef CONFIG_NET_MEDIATEK_SOC_WED
854 if (mtk_wed_device_active(&dev->mmio.wed) &&
855 token >= dev->mmio.wed.wlan.token_start)
856 dev->wed_token_count++;
857 #endif
858
859 if (dev->token_count >= dev->token_size - MT76_TOKEN_FREE_THR)
860 __mt76_set_tx_blocked(dev, true);
861
862 spin_unlock_bh(&dev->token_lock);
863
864 return token;
865 }
866 EXPORT_SYMBOL_GPL(mt76_token_consume);
867
mt76_rx_token_consume(struct mt76_dev * dev,void * ptr,struct mt76_txwi_cache * t,dma_addr_t phys)868 int mt76_rx_token_consume(struct mt76_dev *dev, void *ptr,
869 struct mt76_txwi_cache *t, dma_addr_t phys)
870 {
871 int token;
872
873 spin_lock_bh(&dev->rx_token_lock);
874 token = idr_alloc(&dev->rx_token, t, 0, dev->rx_token_size,
875 GFP_ATOMIC);
876 if (token >= 0) {
877 t->ptr = ptr;
878 t->dma_addr = phys;
879 }
880 spin_unlock_bh(&dev->rx_token_lock);
881
882 return token;
883 }
884 EXPORT_SYMBOL_GPL(mt76_rx_token_consume);
885
886 struct mt76_txwi_cache *
mt76_token_release(struct mt76_dev * dev,int token,bool * wake)887 mt76_token_release(struct mt76_dev *dev, int token, bool *wake)
888 {
889 struct mt76_txwi_cache *txwi;
890
891 spin_lock_bh(&dev->token_lock);
892
893 txwi = idr_remove(&dev->token, token);
894 if (txwi) {
895 dev->token_count--;
896
897 #ifdef CONFIG_NET_MEDIATEK_SOC_WED
898 if (mtk_wed_device_active(&dev->mmio.wed) &&
899 token >= dev->mmio.wed.wlan.token_start &&
900 --dev->wed_token_count == 0)
901 wake_up(&dev->tx_wait);
902 #endif
903 }
904
905 if (dev->token_count < dev->token_size - MT76_TOKEN_FREE_THR &&
906 dev->phy.q_tx[0]->blocked)
907 *wake = true;
908
909 spin_unlock_bh(&dev->token_lock);
910
911 return txwi;
912 }
913 EXPORT_SYMBOL_GPL(mt76_token_release);
914
915 struct mt76_txwi_cache *
mt76_rx_token_release(struct mt76_dev * dev,int token)916 mt76_rx_token_release(struct mt76_dev *dev, int token)
917 {
918 struct mt76_txwi_cache *t;
919
920 spin_lock_bh(&dev->rx_token_lock);
921 t = idr_remove(&dev->rx_token, token);
922 spin_unlock_bh(&dev->rx_token_lock);
923
924 return t;
925 }
926 EXPORT_SYMBOL_GPL(mt76_rx_token_release);
927