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18#include <linux/kernel.h>
19#include <linux/irq.h>
20
21#include "mt76x02.h"
22#include "mt76x02_mcu.h"
23#include "mt76x02_trace.h"
24
25static void mt76x02_pre_tbtt_tasklet(unsigned long arg)
26{
27 struct mt76x02_dev *dev = (struct mt76x02_dev *)arg;
28 struct mt76_queue *q = dev->mt76.q_tx[MT_TXQ_PSD].q;
29 struct beacon_bc_data data = {};
30 struct sk_buff *skb;
31 int i;
32
33 if (mt76_hw(dev)->conf.flags & IEEE80211_CONF_OFFCHANNEL)
34 return;
35
36 mt76x02_resync_beacon_timer(dev);
37
38 ieee80211_iterate_active_interfaces_atomic(mt76_hw(dev),
39 IEEE80211_IFACE_ITER_RESUME_ALL,
40 mt76x02_update_beacon_iter, dev);
41
42 mt76_csa_check(&dev->mt76);
43
44 if (dev->mt76.csa_complete)
45 return;
46
47 mt76x02_enqueue_buffered_bc(dev, &data, 8);
48
49 if (!skb_queue_len(&data.q))
50 return;
51
52 for (i = 0; i < ARRAY_SIZE(data.tail); i++) {
53 if (!data.tail[i])
54 continue;
55
56 mt76_skb_set_moredata(data.tail[i], false);
57 }
58
59 spin_lock_bh(&q->lock);
60 while ((skb = __skb_dequeue(&data.q)) != NULL) {
61 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
62 struct ieee80211_vif *vif = info->control.vif;
63 struct mt76x02_vif *mvif = (struct mt76x02_vif *)vif->drv_priv;
64
65 mt76_tx_queue_skb(dev, MT_TXQ_PSD, skb, &mvif->group_wcid,
66 NULL);
67 }
68 spin_unlock_bh(&q->lock);
69}
70
71static void mt76x02e_pre_tbtt_enable(struct mt76x02_dev *dev, bool en)
72{
73 if (en)
74 tasklet_enable(&dev->mt76.pre_tbtt_tasklet);
75 else
76 tasklet_disable(&dev->mt76.pre_tbtt_tasklet);
77}
78
79static void mt76x02e_beacon_enable(struct mt76x02_dev *dev, bool en)
80{
81 mt76_rmw_field(dev, MT_INT_TIMER_EN, MT_INT_TIMER_EN_PRE_TBTT_EN, en);
82 if (en)
83 mt76x02_irq_enable(dev, MT_INT_PRE_TBTT | MT_INT_TBTT);
84 else
85 mt76x02_irq_disable(dev, MT_INT_PRE_TBTT | MT_INT_TBTT);
86}
87
88void mt76x02e_init_beacon_config(struct mt76x02_dev *dev)
89{
90 static const struct mt76x02_beacon_ops beacon_ops = {
91 .nslots = 8,
92 .slot_size = 1024,
93 .pre_tbtt_enable = mt76x02e_pre_tbtt_enable,
94 .beacon_enable = mt76x02e_beacon_enable,
95 };
96
97 dev->beacon_ops = &beacon_ops;
98
99
100 mt76_rmw_field(dev, MT_INT_TIMER_CFG, MT_INT_TIMER_CFG_PRE_TBTT, 8 << 4);
101 mt76_rmw_field(dev, MT_INT_TIMER_CFG, MT_INT_TIMER_CFG_GP_TIMER,
102 MT_DFS_GP_INTERVAL);
103 mt76_wr(dev, MT_INT_TIMER_EN, 0);
104
105 mt76x02_init_beacon_config(dev);
106}
107EXPORT_SYMBOL_GPL(mt76x02e_init_beacon_config);
108
109static int
110mt76x02_init_tx_queue(struct mt76x02_dev *dev, struct mt76_sw_queue *q,
111 int idx, int n_desc)
112{
113 struct mt76_queue *hwq;
114 int err;
115
116 hwq = devm_kzalloc(dev->mt76.dev, sizeof(*hwq), GFP_KERNEL);
117 if (!hwq)
118 return -ENOMEM;
119
120 err = mt76_queue_alloc(dev, hwq, idx, n_desc, 0, MT_TX_RING_BASE);
121 if (err < 0)
122 return err;
123
124 INIT_LIST_HEAD(&q->swq);
125 q->q = hwq;
126
127 mt76x02_irq_enable(dev, MT_INT_TX_DONE(idx));
128
129 return 0;
130}
131
132static int
133mt76x02_init_rx_queue(struct mt76x02_dev *dev, struct mt76_queue *q,
134 int idx, int n_desc, int bufsize)
135{
136 int err;
137
138 err = mt76_queue_alloc(dev, q, idx, n_desc, bufsize,
139 MT_RX_RING_BASE);
140 if (err < 0)
141 return err;
142
143 mt76x02_irq_enable(dev, MT_INT_RX_DONE(idx));
144
145 return 0;
146}
147
148static void mt76x02_process_tx_status_fifo(struct mt76x02_dev *dev)
149{
150 struct mt76x02_tx_status stat;
151 u8 update = 1;
152
153 while (kfifo_get(&dev->txstatus_fifo, &stat))
154 mt76x02_send_tx_status(dev, &stat, &update);
155}
156
157static void mt76x02_tx_tasklet(unsigned long data)
158{
159 struct mt76x02_dev *dev = (struct mt76x02_dev *)data;
160
161 mt76x02_mac_poll_tx_status(dev, false);
162 mt76x02_process_tx_status_fifo(dev);
163
164 mt76_txq_schedule_all(&dev->mt76);
165}
166
167static int mt76x02_poll_tx(struct napi_struct *napi, int budget)
168{
169 struct mt76x02_dev *dev = container_of(napi, struct mt76x02_dev, tx_napi);
170 int i;
171
172 mt76x02_mac_poll_tx_status(dev, false);
173
174 for (i = MT_TXQ_MCU; i >= 0; i--)
175 mt76_queue_tx_cleanup(dev, i, false);
176
177 if (napi_complete_done(napi, 0))
178 mt76x02_irq_enable(dev, MT_INT_TX_DONE_ALL);
179
180 for (i = MT_TXQ_MCU; i >= 0; i--)
181 mt76_queue_tx_cleanup(dev, i, false);
182
183 tasklet_schedule(&dev->mt76.tx_tasklet);
184
185 return 0;
186}
187
188int mt76x02_dma_init(struct mt76x02_dev *dev)
189{
190 struct mt76_txwi_cache __maybe_unused *t;
191 int i, ret, fifo_size;
192 struct mt76_queue *q;
193 void *status_fifo;
194
195 BUILD_BUG_ON(sizeof(struct mt76x02_rxwi) > MT_RX_HEADROOM);
196
197 fifo_size = roundup_pow_of_two(32 * sizeof(struct mt76x02_tx_status));
198 status_fifo = devm_kzalloc(dev->mt76.dev, fifo_size, GFP_KERNEL);
199 if (!status_fifo)
200 return -ENOMEM;
201
202 tasklet_init(&dev->mt76.tx_tasklet, mt76x02_tx_tasklet,
203 (unsigned long) dev);
204 tasklet_init(&dev->mt76.pre_tbtt_tasklet, mt76x02_pre_tbtt_tasklet,
205 (unsigned long)dev);
206
207 spin_lock_init(&dev->txstatus_fifo_lock);
208 kfifo_init(&dev->txstatus_fifo, status_fifo, fifo_size);
209
210 mt76_dma_attach(&dev->mt76);
211
212 mt76_wr(dev, MT_WPDMA_RST_IDX, ~0);
213
214 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
215 ret = mt76x02_init_tx_queue(dev, &dev->mt76.q_tx[i],
216 mt76_ac_to_hwq(i),
217 MT_TX_RING_SIZE);
218 if (ret)
219 return ret;
220 }
221
222 ret = mt76x02_init_tx_queue(dev, &dev->mt76.q_tx[MT_TXQ_PSD],
223 MT_TX_HW_QUEUE_MGMT, MT_TX_RING_SIZE);
224 if (ret)
225 return ret;
226
227 ret = mt76x02_init_tx_queue(dev, &dev->mt76.q_tx[MT_TXQ_MCU],
228 MT_TX_HW_QUEUE_MCU, MT_MCU_RING_SIZE);
229 if (ret)
230 return ret;
231
232 ret = mt76x02_init_rx_queue(dev, &dev->mt76.q_rx[MT_RXQ_MCU], 1,
233 MT_MCU_RING_SIZE, MT_RX_BUF_SIZE);
234 if (ret)
235 return ret;
236
237 q = &dev->mt76.q_rx[MT_RXQ_MAIN];
238 q->buf_offset = MT_RX_HEADROOM - sizeof(struct mt76x02_rxwi);
239 ret = mt76x02_init_rx_queue(dev, q, 0, MT76X02_RX_RING_SIZE,
240 MT_RX_BUF_SIZE);
241 if (ret)
242 return ret;
243
244 ret = mt76_init_queues(dev);
245 if (ret)
246 return ret;
247
248 netif_tx_napi_add(&dev->mt76.napi_dev, &dev->tx_napi, mt76x02_poll_tx,
249 NAPI_POLL_WEIGHT);
250 napi_enable(&dev->tx_napi);
251
252 return 0;
253}
254EXPORT_SYMBOL_GPL(mt76x02_dma_init);
255
256void mt76x02_rx_poll_complete(struct mt76_dev *mdev, enum mt76_rxq_id q)
257{
258 struct mt76x02_dev *dev;
259
260 dev = container_of(mdev, struct mt76x02_dev, mt76);
261 mt76x02_irq_enable(dev, MT_INT_RX_DONE(q));
262}
263EXPORT_SYMBOL_GPL(mt76x02_rx_poll_complete);
264
265irqreturn_t mt76x02_irq_handler(int irq, void *dev_instance)
266{
267 struct mt76x02_dev *dev = dev_instance;
268 u32 intr;
269
270 intr = mt76_rr(dev, MT_INT_SOURCE_CSR);
271 mt76_wr(dev, MT_INT_SOURCE_CSR, intr);
272
273 if (!test_bit(MT76_STATE_INITIALIZED, &dev->mt76.state))
274 return IRQ_NONE;
275
276 trace_dev_irq(dev, intr, dev->mt76.mmio.irqmask);
277
278 intr &= dev->mt76.mmio.irqmask;
279
280 if (intr & MT_INT_RX_DONE(0)) {
281 mt76x02_irq_disable(dev, MT_INT_RX_DONE(0));
282 napi_schedule(&dev->mt76.napi[0]);
283 }
284
285 if (intr & MT_INT_RX_DONE(1)) {
286 mt76x02_irq_disable(dev, MT_INT_RX_DONE(1));
287 napi_schedule(&dev->mt76.napi[1]);
288 }
289
290 if (intr & MT_INT_PRE_TBTT)
291 tasklet_schedule(&dev->mt76.pre_tbtt_tasklet);
292
293
294 if (intr & MT_INT_TBTT) {
295 if (dev->mt76.csa_complete)
296 mt76_csa_finish(&dev->mt76);
297 else
298 mt76_queue_kick(dev, dev->mt76.q_tx[MT_TXQ_PSD].q);
299 }
300
301 if (intr & MT_INT_TX_STAT)
302 mt76x02_mac_poll_tx_status(dev, true);
303
304 if (intr & (MT_INT_TX_STAT | MT_INT_TX_DONE_ALL)) {
305 mt76x02_irq_disable(dev, MT_INT_TX_DONE_ALL);
306 napi_schedule(&dev->tx_napi);
307 }
308
309 if (intr & MT_INT_GPTIMER) {
310 mt76x02_irq_disable(dev, MT_INT_GPTIMER);
311 tasklet_schedule(&dev->dfs_pd.dfs_tasklet);
312 }
313
314 return IRQ_HANDLED;
315}
316EXPORT_SYMBOL_GPL(mt76x02_irq_handler);
317
318static void mt76x02_dma_enable(struct mt76x02_dev *dev)
319{
320 u32 val;
321
322 mt76_wr(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_ENABLE_TX);
323 mt76x02_wait_for_wpdma(&dev->mt76, 1000);
324 usleep_range(50, 100);
325
326 val = FIELD_PREP(MT_WPDMA_GLO_CFG_DMA_BURST_SIZE, 3) |
327 MT_WPDMA_GLO_CFG_TX_DMA_EN |
328 MT_WPDMA_GLO_CFG_RX_DMA_EN;
329 mt76_set(dev, MT_WPDMA_GLO_CFG, val);
330 mt76_clear(dev, MT_WPDMA_GLO_CFG,
331 MT_WPDMA_GLO_CFG_TX_WRITEBACK_DONE);
332}
333
334void mt76x02_dma_cleanup(struct mt76x02_dev *dev)
335{
336 tasklet_kill(&dev->mt76.tx_tasklet);
337 netif_napi_del(&dev->tx_napi);
338 mt76_dma_cleanup(&dev->mt76);
339}
340EXPORT_SYMBOL_GPL(mt76x02_dma_cleanup);
341
342void mt76x02_dma_disable(struct mt76x02_dev *dev)
343{
344 u32 val = mt76_rr(dev, MT_WPDMA_GLO_CFG);
345
346 val &= MT_WPDMA_GLO_CFG_DMA_BURST_SIZE |
347 MT_WPDMA_GLO_CFG_BIG_ENDIAN |
348 MT_WPDMA_GLO_CFG_HDR_SEG_LEN;
349 val |= MT_WPDMA_GLO_CFG_TX_WRITEBACK_DONE;
350 mt76_wr(dev, MT_WPDMA_GLO_CFG, val);
351}
352EXPORT_SYMBOL_GPL(mt76x02_dma_disable);
353
354void mt76x02_mac_start(struct mt76x02_dev *dev)
355{
356 mt76x02_dma_enable(dev);
357 mt76_wr(dev, MT_RX_FILTR_CFG, dev->mt76.rxfilter);
358 mt76_wr(dev, MT_MAC_SYS_CTRL,
359 MT_MAC_SYS_CTRL_ENABLE_TX |
360 MT_MAC_SYS_CTRL_ENABLE_RX);
361 mt76x02_irq_enable(dev,
362 MT_INT_RX_DONE_ALL | MT_INT_TX_DONE_ALL |
363 MT_INT_TX_STAT);
364}
365EXPORT_SYMBOL_GPL(mt76x02_mac_start);
366
367static bool mt76x02_tx_hang(struct mt76x02_dev *dev)
368{
369 u32 dma_idx, prev_dma_idx;
370 struct mt76_queue *q;
371 int i;
372
373 for (i = 0; i < 4; i++) {
374 q = dev->mt76.q_tx[i].q;
375
376 if (!q->queued)
377 continue;
378
379 prev_dma_idx = dev->mt76.tx_dma_idx[i];
380 dma_idx = readl(&q->regs->dma_idx);
381 dev->mt76.tx_dma_idx[i] = dma_idx;
382
383 if (prev_dma_idx == dma_idx)
384 break;
385 }
386
387 return i < 4;
388}
389
390static void mt76x02_key_sync(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
391 struct ieee80211_sta *sta,
392 struct ieee80211_key_conf *key, void *data)
393{
394 struct mt76x02_dev *dev = hw->priv;
395 struct mt76_wcid *wcid;
396
397 if (!sta)
398 return;
399
400 wcid = (struct mt76_wcid *) sta->drv_priv;
401
402 if (wcid->hw_key_idx != key->keyidx || wcid->sw_iv)
403 return;
404
405 mt76x02_mac_wcid_sync_pn(dev, wcid->idx, key);
406}
407
408static void mt76x02_reset_state(struct mt76x02_dev *dev)
409{
410 int i;
411
412 lockdep_assert_held(&dev->mt76.mutex);
413
414 clear_bit(MT76_STATE_RUNNING, &dev->mt76.state);
415
416 rcu_read_lock();
417 ieee80211_iter_keys_rcu(dev->mt76.hw, NULL, mt76x02_key_sync, NULL);
418 rcu_read_unlock();
419
420 for (i = 0; i < ARRAY_SIZE(dev->mt76.wcid); i++) {
421 struct ieee80211_sta *sta;
422 struct ieee80211_vif *vif;
423 struct mt76x02_sta *msta;
424 struct mt76_wcid *wcid;
425 void *priv;
426
427 wcid = rcu_dereference_protected(dev->mt76.wcid[i],
428 lockdep_is_held(&dev->mt76.mutex));
429 if (!wcid)
430 continue;
431
432 priv = msta = container_of(wcid, struct mt76x02_sta, wcid);
433 sta = container_of(priv, struct ieee80211_sta, drv_priv);
434
435 priv = msta->vif;
436 vif = container_of(priv, struct ieee80211_vif, drv_priv);
437
438 __mt76_sta_remove(&dev->mt76, vif, sta);
439 memset(msta, 0, sizeof(*msta));
440 }
441
442 dev->vif_mask = 0;
443 dev->mt76.beacon_mask = 0;
444}
445
446static void mt76x02_watchdog_reset(struct mt76x02_dev *dev)
447{
448 u32 mask = dev->mt76.mmio.irqmask;
449 bool restart = dev->mt76.mcu_ops->mcu_restart;
450 int i;
451
452 ieee80211_stop_queues(dev->mt76.hw);
453 set_bit(MT76_RESET, &dev->mt76.state);
454
455 tasklet_disable(&dev->mt76.pre_tbtt_tasklet);
456 tasklet_disable(&dev->mt76.tx_tasklet);
457 napi_disable(&dev->tx_napi);
458
459 for (i = 0; i < ARRAY_SIZE(dev->mt76.napi); i++)
460 napi_disable(&dev->mt76.napi[i]);
461
462 mutex_lock(&dev->mt76.mutex);
463
464 if (restart)
465 mt76x02_reset_state(dev);
466
467 if (dev->mt76.beacon_mask)
468 mt76_clear(dev, MT_BEACON_TIME_CFG,
469 MT_BEACON_TIME_CFG_BEACON_TX |
470 MT_BEACON_TIME_CFG_TBTT_EN);
471
472 mt76x02_irq_disable(dev, mask);
473
474
475 mt76_clear(dev, MT_TXOP_CTRL_CFG, MT_TXOP_ED_CCA_EN);
476 mt76_wr(dev, MT_MAC_SYS_CTRL, 0);
477 mt76_clear(dev, MT_WPDMA_GLO_CFG,
478 MT_WPDMA_GLO_CFG_TX_DMA_EN | MT_WPDMA_GLO_CFG_RX_DMA_EN);
479 usleep_range(5000, 10000);
480 mt76_wr(dev, MT_INT_SOURCE_CSR, 0xffffffff);
481
482
483 mt76_set(dev, 0x734, 0x3);
484
485 if (restart)
486 mt76_mcu_restart(dev);
487
488 for (i = 0; i < ARRAY_SIZE(dev->mt76.q_tx); i++)
489 mt76_queue_tx_cleanup(dev, i, true);
490
491 for (i = 0; i < ARRAY_SIZE(dev->mt76.q_rx); i++)
492 mt76_queue_rx_reset(dev, i);
493
494 mt76x02_mac_start(dev);
495
496 if (dev->ed_monitor)
497 mt76_set(dev, MT_TXOP_CTRL_CFG, MT_TXOP_ED_CCA_EN);
498
499 if (dev->mt76.beacon_mask && !restart)
500 mt76_set(dev, MT_BEACON_TIME_CFG,
501 MT_BEACON_TIME_CFG_BEACON_TX |
502 MT_BEACON_TIME_CFG_TBTT_EN);
503
504 mt76x02_irq_enable(dev, mask);
505
506 mutex_unlock(&dev->mt76.mutex);
507
508 clear_bit(MT76_RESET, &dev->mt76.state);
509
510 tasklet_enable(&dev->mt76.tx_tasklet);
511 napi_enable(&dev->tx_napi);
512 napi_schedule(&dev->tx_napi);
513
514 tasklet_enable(&dev->mt76.pre_tbtt_tasklet);
515
516 for (i = 0; i < ARRAY_SIZE(dev->mt76.napi); i++) {
517 napi_enable(&dev->mt76.napi[i]);
518 napi_schedule(&dev->mt76.napi[i]);
519 }
520
521 if (restart) {
522 mt76x02_mcu_function_select(dev, Q_SELECT, 1);
523 ieee80211_restart_hw(dev->mt76.hw);
524 } else {
525 ieee80211_wake_queues(dev->mt76.hw);
526 mt76_txq_schedule_all(&dev->mt76);
527 }
528}
529
530static void mt76x02_check_tx_hang(struct mt76x02_dev *dev)
531{
532 if (mt76x02_tx_hang(dev)) {
533 if (++dev->tx_hang_check >= MT_TX_HANG_TH)
534 goto restart;
535 } else {
536 dev->tx_hang_check = 0;
537 }
538
539 if (dev->mcu_timeout)
540 goto restart;
541
542 return;
543
544restart:
545 mt76x02_watchdog_reset(dev);
546
547 mutex_lock(&dev->mt76.mmio.mcu.mutex);
548 dev->mcu_timeout = 0;
549 mutex_unlock(&dev->mt76.mmio.mcu.mutex);
550
551 dev->tx_hang_reset++;
552 dev->tx_hang_check = 0;
553 memset(dev->mt76.tx_dma_idx, 0xff,
554 sizeof(dev->mt76.tx_dma_idx));
555}
556
557void mt76x02_wdt_work(struct work_struct *work)
558{
559 struct mt76x02_dev *dev = container_of(work, struct mt76x02_dev,
560 wdt_work.work);
561
562 mt76x02_check_tx_hang(dev);
563
564 ieee80211_queue_delayed_work(mt76_hw(dev), &dev->wdt_work,
565 MT_WATCHDOG_TIME);
566}
567
