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7#include <linux/kernel.h>
8#include <linux/irq.h>
9
10#include "mt76x02.h"
11#include "mt76x02_mcu.h"
12#include "trace.h"
13
14static void mt76x02_pre_tbtt_tasklet(struct tasklet_struct *t)
15{
16 struct mt76x02_dev *dev = from_tasklet(dev, t, mt76.pre_tbtt_tasklet);
17 struct mt76_dev *mdev = &dev->mt76;
18 struct mt76_queue *q = dev->mphy.q_tx[MT_TXQ_PSD];
19 struct beacon_bc_data data = {};
20 struct sk_buff *skb;
21 int i;
22
23 if (mt76_hw(dev)->conf.flags & IEEE80211_CONF_OFFCHANNEL)
24 return;
25
26 mt76x02_resync_beacon_timer(dev);
27
28
29 mt76_set(dev, MT_BCN_BYPASS_MASK, 0xffff);
30 dev->beacon_data_count = 0;
31
32 ieee80211_iterate_active_interfaces_atomic(mt76_hw(dev),
33 IEEE80211_IFACE_ITER_RESUME_ALL,
34 mt76x02_update_beacon_iter, dev);
35
36 mt76_wr(dev, MT_BCN_BYPASS_MASK,
37 0xff00 | ~(0xff00 >> dev->beacon_data_count));
38
39 mt76_csa_check(mdev);
40
41 if (mdev->csa_complete)
42 return;
43
44 mt76x02_enqueue_buffered_bc(dev, &data, 8);
45
46 if (!skb_queue_len(&data.q))
47 return;
48
49 for (i = 0; i < ARRAY_SIZE(data.tail); i++) {
50 if (!data.tail[i])
51 continue;
52
53 mt76_skb_set_moredata(data.tail[i], false);
54 }
55
56 spin_lock_bh(&q->lock);
57 while ((skb = __skb_dequeue(&data.q)) != NULL) {
58 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
59 struct ieee80211_vif *vif = info->control.vif;
60 struct mt76x02_vif *mvif = (struct mt76x02_vif *)vif->drv_priv;
61
62 mt76_tx_queue_skb(dev, q, skb, &mvif->group_wcid, NULL);
63 }
64 spin_unlock_bh(&q->lock);
65}
66
67static void mt76x02e_pre_tbtt_enable(struct mt76x02_dev *dev, bool en)
68{
69 if (en)
70 tasklet_enable(&dev->mt76.pre_tbtt_tasklet);
71 else
72 tasklet_disable(&dev->mt76.pre_tbtt_tasklet);
73}
74
75static void mt76x02e_beacon_enable(struct mt76x02_dev *dev, bool en)
76{
77 mt76_rmw_field(dev, MT_INT_TIMER_EN, MT_INT_TIMER_EN_PRE_TBTT_EN, en);
78 if (en)
79 mt76x02_irq_enable(dev, MT_INT_PRE_TBTT | MT_INT_TBTT);
80 else
81 mt76x02_irq_disable(dev, MT_INT_PRE_TBTT | MT_INT_TBTT);
82}
83
84void mt76x02e_init_beacon_config(struct mt76x02_dev *dev)
85{
86 static const struct mt76x02_beacon_ops beacon_ops = {
87 .nslots = 8,
88 .slot_size = 1024,
89 .pre_tbtt_enable = mt76x02e_pre_tbtt_enable,
90 .beacon_enable = mt76x02e_beacon_enable,
91 };
92
93 dev->beacon_ops = &beacon_ops;
94
95
96 mt76_rmw_field(dev, MT_INT_TIMER_CFG, MT_INT_TIMER_CFG_PRE_TBTT,
97 8 << 4);
98 mt76_rmw_field(dev, MT_INT_TIMER_CFG, MT_INT_TIMER_CFG_GP_TIMER,
99 MT_DFS_GP_INTERVAL);
100 mt76_wr(dev, MT_INT_TIMER_EN, 0);
101
102 mt76x02_init_beacon_config(dev);
103}
104EXPORT_SYMBOL_GPL(mt76x02e_init_beacon_config);
105
106static int
107mt76x02_init_rx_queue(struct mt76x02_dev *dev, struct mt76_queue *q,
108 int idx, int n_desc, int bufsize)
109{
110 int err;
111
112 err = mt76_queue_alloc(dev, q, idx, n_desc, bufsize,
113 MT_RX_RING_BASE);
114 if (err < 0)
115 return err;
116
117 mt76x02_irq_enable(dev, MT_INT_RX_DONE(idx));
118
119 return 0;
120}
121
122static void mt76x02_process_tx_status_fifo(struct mt76x02_dev *dev)
123{
124 struct mt76x02_tx_status stat;
125 u8 update = 1;
126
127 while (kfifo_get(&dev->txstatus_fifo, &stat))
128 mt76x02_send_tx_status(dev, &stat, &update);
129}
130
131static void mt76x02_tx_worker(struct mt76_worker *w)
132{
133 struct mt76x02_dev *dev;
134
135 dev = container_of(w, struct mt76x02_dev, mt76.tx_worker);
136
137 mt76x02_mac_poll_tx_status(dev, false);
138 mt76x02_process_tx_status_fifo(dev);
139
140 mt76_txq_schedule_all(&dev->mphy);
141}
142
143static int mt76x02_poll_tx(struct napi_struct *napi, int budget)
144{
145 struct mt76x02_dev *dev = container_of(napi, struct mt76x02_dev,
146 mt76.tx_napi);
147 int i;
148
149 mt76x02_mac_poll_tx_status(dev, false);
150
151 mt76_queue_tx_cleanup(dev, dev->mt76.q_mcu[MT_MCUQ_WM], false);
152 for (i = MT_TXQ_PSD; i >= 0; i--)
153 mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[i], false);
154
155 if (napi_complete_done(napi, 0))
156 mt76x02_irq_enable(dev, MT_INT_TX_DONE_ALL);
157
158 mt76_queue_tx_cleanup(dev, dev->mt76.q_mcu[MT_MCUQ_WM], false);
159 for (i = MT_TXQ_PSD; i >= 0; i--)
160 mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[i], false);
161
162 mt76_worker_schedule(&dev->mt76.tx_worker);
163
164 return 0;
165}
166
167int mt76x02_dma_init(struct mt76x02_dev *dev)
168{
169 struct mt76_txwi_cache __maybe_unused *t;
170 int i, ret, fifo_size;
171 struct mt76_queue *q;
172 void *status_fifo;
173
174 BUILD_BUG_ON(sizeof(struct mt76x02_rxwi) > MT_RX_HEADROOM);
175
176 fifo_size = roundup_pow_of_two(32 * sizeof(struct mt76x02_tx_status));
177 status_fifo = devm_kzalloc(dev->mt76.dev, fifo_size, GFP_KERNEL);
178 if (!status_fifo)
179 return -ENOMEM;
180
181 dev->mt76.tx_worker.fn = mt76x02_tx_worker;
182 tasklet_setup(&dev->mt76.pre_tbtt_tasklet, mt76x02_pre_tbtt_tasklet);
183
184 spin_lock_init(&dev->txstatus_fifo_lock);
185 kfifo_init(&dev->txstatus_fifo, status_fifo, fifo_size);
186
187 mt76_dma_attach(&dev->mt76);
188
189 mt76_wr(dev, MT_WPDMA_RST_IDX, ~0);
190
191 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
192 ret = mt76_init_tx_queue(&dev->mphy, i, mt76_ac_to_hwq(i),
193 MT76x02_TX_RING_SIZE,
194 MT_TX_RING_BASE);
195 if (ret)
196 return ret;
197 }
198
199 ret = mt76_init_tx_queue(&dev->mphy, MT_TXQ_PSD, MT_TX_HW_QUEUE_MGMT,
200 MT76x02_PSD_RING_SIZE, MT_TX_RING_BASE);
201 if (ret)
202 return ret;
203
204 ret = mt76_init_mcu_queue(&dev->mt76, MT_MCUQ_WM, MT_TX_HW_QUEUE_MCU,
205 MT_MCU_RING_SIZE, MT_TX_RING_BASE);
206 if (ret)
207 return ret;
208
209 mt76x02_irq_enable(dev,
210 MT_INT_TX_DONE(IEEE80211_AC_VO) |
211 MT_INT_TX_DONE(IEEE80211_AC_VI) |
212 MT_INT_TX_DONE(IEEE80211_AC_BE) |
213 MT_INT_TX_DONE(IEEE80211_AC_BK) |
214 MT_INT_TX_DONE(MT_TX_HW_QUEUE_MGMT) |
215 MT_INT_TX_DONE(MT_TX_HW_QUEUE_MCU));
216
217 ret = mt76x02_init_rx_queue(dev, &dev->mt76.q_rx[MT_RXQ_MCU], 1,
218 MT_MCU_RING_SIZE, MT_RX_BUF_SIZE);
219 if (ret)
220 return ret;
221
222 q = &dev->mt76.q_rx[MT_RXQ_MAIN];
223 q->buf_offset = MT_RX_HEADROOM - sizeof(struct mt76x02_rxwi);
224 ret = mt76x02_init_rx_queue(dev, q, 0, MT76X02_RX_RING_SIZE,
225 MT_RX_BUF_SIZE);
226 if (ret)
227 return ret;
228
229 ret = mt76_init_queues(dev, mt76_dma_rx_poll);
230 if (ret)
231 return ret;
232
233 netif_tx_napi_add(&dev->mt76.tx_napi_dev, &dev->mt76.tx_napi,
234 mt76x02_poll_tx, NAPI_POLL_WEIGHT);
235 napi_enable(&dev->mt76.tx_napi);
236
237 return 0;
238}
239EXPORT_SYMBOL_GPL(mt76x02_dma_init);
240
241void mt76x02_rx_poll_complete(struct mt76_dev *mdev, enum mt76_rxq_id q)
242{
243 struct mt76x02_dev *dev;
244
245 dev = container_of(mdev, struct mt76x02_dev, mt76);
246 mt76x02_irq_enable(dev, MT_INT_RX_DONE(q));
247}
248EXPORT_SYMBOL_GPL(mt76x02_rx_poll_complete);
249
250irqreturn_t mt76x02_irq_handler(int irq, void *dev_instance)
251{
252 struct mt76x02_dev *dev = dev_instance;
253 u32 intr, mask;
254
255 intr = mt76_rr(dev, MT_INT_SOURCE_CSR);
256 intr &= dev->mt76.mmio.irqmask;
257 mt76_wr(dev, MT_INT_SOURCE_CSR, intr);
258
259 if (!test_bit(MT76_STATE_INITIALIZED, &dev->mphy.state))
260 return IRQ_NONE;
261
262 trace_dev_irq(&dev->mt76, intr, dev->mt76.mmio.irqmask);
263
264 mask = intr & (MT_INT_RX_DONE_ALL | MT_INT_GPTIMER);
265 if (intr & (MT_INT_TX_DONE_ALL | MT_INT_TX_STAT))
266 mask |= MT_INT_TX_DONE_ALL;
267
268 mt76x02_irq_disable(dev, mask);
269
270 if (intr & MT_INT_RX_DONE(0))
271 napi_schedule(&dev->mt76.napi[0]);
272
273 if (intr & MT_INT_RX_DONE(1))
274 napi_schedule(&dev->mt76.napi[1]);
275
276 if (intr & MT_INT_PRE_TBTT)
277 tasklet_schedule(&dev->mt76.pre_tbtt_tasklet);
278
279
280 if (intr & MT_INT_TBTT) {
281 if (dev->mt76.csa_complete)
282 mt76_csa_finish(&dev->mt76);
283 else
284 mt76_queue_kick(dev, dev->mphy.q_tx[MT_TXQ_PSD]);
285 }
286
287 if (intr & MT_INT_TX_STAT)
288 mt76x02_mac_poll_tx_status(dev, true);
289
290 if (intr & (MT_INT_TX_STAT | MT_INT_TX_DONE_ALL))
291 napi_schedule(&dev->mt76.tx_napi);
292
293 if (intr & MT_INT_GPTIMER)
294 tasklet_schedule(&dev->dfs_pd.dfs_tasklet);
295
296 return IRQ_HANDLED;
297}
298EXPORT_SYMBOL_GPL(mt76x02_irq_handler);
299
300static void mt76x02_dma_enable(struct mt76x02_dev *dev)
301{
302 u32 val;
303
304 mt76_wr(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_ENABLE_TX);
305 mt76x02_wait_for_wpdma(&dev->mt76, 1000);
306 usleep_range(50, 100);
307
308 val = FIELD_PREP(MT_WPDMA_GLO_CFG_DMA_BURST_SIZE, 3) |
309 MT_WPDMA_GLO_CFG_TX_DMA_EN |
310 MT_WPDMA_GLO_CFG_RX_DMA_EN;
311 mt76_set(dev, MT_WPDMA_GLO_CFG, val);
312 mt76_clear(dev, MT_WPDMA_GLO_CFG,
313 MT_WPDMA_GLO_CFG_TX_WRITEBACK_DONE);
314}
315
316void mt76x02_dma_disable(struct mt76x02_dev *dev)
317{
318 u32 val = mt76_rr(dev, MT_WPDMA_GLO_CFG);
319
320 val &= MT_WPDMA_GLO_CFG_DMA_BURST_SIZE |
321 MT_WPDMA_GLO_CFG_BIG_ENDIAN |
322 MT_WPDMA_GLO_CFG_HDR_SEG_LEN;
323 val |= MT_WPDMA_GLO_CFG_TX_WRITEBACK_DONE;
324 mt76_wr(dev, MT_WPDMA_GLO_CFG, val);
325}
326EXPORT_SYMBOL_GPL(mt76x02_dma_disable);
327
328void mt76x02_mac_start(struct mt76x02_dev *dev)
329{
330 mt76x02_mac_reset_counters(dev);
331 mt76x02_dma_enable(dev);
332 mt76_wr(dev, MT_RX_FILTR_CFG, dev->mt76.rxfilter);
333 mt76_wr(dev, MT_MAC_SYS_CTRL,
334 MT_MAC_SYS_CTRL_ENABLE_TX |
335 MT_MAC_SYS_CTRL_ENABLE_RX);
336 mt76x02_irq_enable(dev,
337 MT_INT_RX_DONE_ALL | MT_INT_TX_DONE_ALL |
338 MT_INT_TX_STAT);
339}
340EXPORT_SYMBOL_GPL(mt76x02_mac_start);
341
342static bool mt76x02_tx_hang(struct mt76x02_dev *dev)
343{
344 u32 dma_idx, prev_dma_idx;
345 struct mt76_queue *q;
346 int i;
347
348 for (i = 0; i < 4; i++) {
349 q = dev->mphy.q_tx[i];
350
351 if (!q->queued)
352 continue;
353
354 prev_dma_idx = dev->mt76.tx_dma_idx[i];
355 dma_idx = readl(&q->regs->dma_idx);
356 dev->mt76.tx_dma_idx[i] = dma_idx;
357
358 if (prev_dma_idx == dma_idx)
359 break;
360 }
361
362 return i < 4;
363}
364
365static void mt76x02_key_sync(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
366 struct ieee80211_sta *sta,
367 struct ieee80211_key_conf *key, void *data)
368{
369 struct mt76x02_dev *dev = hw->priv;
370 struct mt76_wcid *wcid;
371
372 if (!sta)
373 return;
374
375 wcid = (struct mt76_wcid *)sta->drv_priv;
376
377 if (wcid->hw_key_idx != key->keyidx || wcid->sw_iv)
378 return;
379
380 mt76x02_mac_wcid_sync_pn(dev, wcid->idx, key);
381}
382
383static void mt76x02_reset_state(struct mt76x02_dev *dev)
384{
385 int i;
386
387 lockdep_assert_held(&dev->mt76.mutex);
388
389 clear_bit(MT76_STATE_RUNNING, &dev->mphy.state);
390
391 rcu_read_lock();
392 ieee80211_iter_keys_rcu(dev->mt76.hw, NULL, mt76x02_key_sync, NULL);
393 rcu_read_unlock();
394
395 for (i = 0; i < MT76x02_N_WCIDS; i++) {
396 struct ieee80211_sta *sta;
397 struct ieee80211_vif *vif;
398 struct mt76x02_sta *msta;
399 struct mt76_wcid *wcid;
400 void *priv;
401
402 wcid = rcu_dereference_protected(dev->mt76.wcid[i],
403 lockdep_is_held(&dev->mt76.mutex));
404 if (!wcid)
405 continue;
406
407 rcu_assign_pointer(dev->mt76.wcid[i], NULL);
408
409 priv = msta = container_of(wcid, struct mt76x02_sta, wcid);
410 sta = container_of(priv, struct ieee80211_sta, drv_priv);
411
412 priv = msta->vif;
413 vif = container_of(priv, struct ieee80211_vif, drv_priv);
414
415 __mt76_sta_remove(&dev->mt76, vif, sta);
416 memset(msta, 0, sizeof(*msta));
417 }
418
419 dev->mt76.vif_mask = 0;
420 dev->mt76.beacon_mask = 0;
421}
422
423static void mt76x02_watchdog_reset(struct mt76x02_dev *dev)
424{
425 u32 mask = dev->mt76.mmio.irqmask;
426 bool restart = dev->mt76.mcu_ops->mcu_restart;
427 int i;
428
429 ieee80211_stop_queues(dev->mt76.hw);
430 set_bit(MT76_RESET, &dev->mphy.state);
431
432 tasklet_disable(&dev->mt76.pre_tbtt_tasklet);
433 mt76_worker_disable(&dev->mt76.tx_worker);
434 napi_disable(&dev->mt76.tx_napi);
435
436 mt76_for_each_q_rx(&dev->mt76, i) {
437 napi_disable(&dev->mt76.napi[i]);
438 }
439
440 mutex_lock(&dev->mt76.mutex);
441
442 dev->mcu_timeout = 0;
443 if (restart)
444 mt76x02_reset_state(dev);
445
446 if (dev->mt76.beacon_mask)
447 mt76_clear(dev, MT_BEACON_TIME_CFG,
448 MT_BEACON_TIME_CFG_BEACON_TX |
449 MT_BEACON_TIME_CFG_TBTT_EN);
450
451 mt76x02_irq_disable(dev, mask);
452
453
454 mt76_clear(dev, MT_TXOP_CTRL_CFG, MT_TXOP_ED_CCA_EN);
455 mt76_wr(dev, MT_MAC_SYS_CTRL, 0);
456 mt76_clear(dev, MT_WPDMA_GLO_CFG,
457 MT_WPDMA_GLO_CFG_TX_DMA_EN | MT_WPDMA_GLO_CFG_RX_DMA_EN);
458 usleep_range(5000, 10000);
459 mt76_wr(dev, MT_INT_SOURCE_CSR, 0xffffffff);
460
461
462 mt76_set(dev, 0x734, 0x3);
463
464 if (restart)
465 mt76_mcu_restart(dev);
466
467 mt76_queue_tx_cleanup(dev, dev->mt76.q_mcu[MT_MCUQ_WM], true);
468 for (i = 0; i < __MT_TXQ_MAX; i++)
469 mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[i], true);
470
471 mt76_for_each_q_rx(&dev->mt76, i) {
472 mt76_queue_rx_reset(dev, i);
473 }
474
475 mt76_tx_status_check(&dev->mt76, NULL, true);
476
477 mt76x02_mac_start(dev);
478
479 if (dev->ed_monitor)
480 mt76_set(dev, MT_TXOP_CTRL_CFG, MT_TXOP_ED_CCA_EN);
481
482 if (dev->mt76.beacon_mask && !restart)
483 mt76_set(dev, MT_BEACON_TIME_CFG,
484 MT_BEACON_TIME_CFG_BEACON_TX |
485 MT_BEACON_TIME_CFG_TBTT_EN);
486
487 mt76x02_irq_enable(dev, mask);
488
489 mutex_unlock(&dev->mt76.mutex);
490
491 clear_bit(MT76_RESET, &dev->mphy.state);
492
493 mt76_worker_enable(&dev->mt76.tx_worker);
494 napi_enable(&dev->mt76.tx_napi);
495 napi_schedule(&dev->mt76.tx_napi);
496
497 tasklet_enable(&dev->mt76.pre_tbtt_tasklet);
498
499 mt76_for_each_q_rx(&dev->mt76, i) {
500 napi_enable(&dev->mt76.napi[i]);
501 napi_schedule(&dev->mt76.napi[i]);
502 }
503
504 if (restart) {
505 set_bit(MT76_RESTART, &dev->mphy.state);
506 mt76x02_mcu_function_select(dev, Q_SELECT, 1);
507 ieee80211_restart_hw(dev->mt76.hw);
508 } else {
509 ieee80211_wake_queues(dev->mt76.hw);
510 mt76_txq_schedule_all(&dev->mphy);
511 }
512}
513
514void mt76x02_reconfig_complete(struct ieee80211_hw *hw,
515 enum ieee80211_reconfig_type reconfig_type)
516{
517 struct mt76x02_dev *dev = hw->priv;
518
519 if (reconfig_type != IEEE80211_RECONFIG_TYPE_RESTART)
520 return;
521
522 clear_bit(MT76_RESTART, &dev->mphy.state);
523}
524EXPORT_SYMBOL_GPL(mt76x02_reconfig_complete);
525
526static void mt76x02_check_tx_hang(struct mt76x02_dev *dev)
527{
528 if (test_bit(MT76_RESTART, &dev->mphy.state))
529 return;
530
531 if (mt76x02_tx_hang(dev)) {
532 if (++dev->tx_hang_check >= MT_TX_HANG_TH)
533 goto restart;
534 } else {
535 dev->tx_hang_check = 0;
536 }
537
538 if (dev->mcu_timeout)
539 goto restart;
540
541 return;
542
543restart:
544 mt76x02_watchdog_reset(dev);
545
546 dev->tx_hang_reset++;
547 dev->tx_hang_check = 0;
548 memset(dev->mt76.tx_dma_idx, 0xff,
549 sizeof(dev->mt76.tx_dma_idx));
550}
551
552void mt76x02_wdt_work(struct work_struct *work)
553{
554 struct mt76x02_dev *dev = container_of(work, struct mt76x02_dev,
555 wdt_work.work);
556
557 mt76x02_check_tx_hang(dev);
558
559 ieee80211_queue_delayed_work(mt76_hw(dev), &dev->wdt_work,
560 MT_WATCHDOG_TIME);
561}
562
