2 * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
3 * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 #include <linux/kernel.h>
19 #include <linux/irq.h>
22 #include "mt76x02_mcu.h"
23 #include "mt76x02_trace.h"
25 static void mt76x02_pre_tbtt_tasklet(unsigned long arg)
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 = {};
33 if (mt76_hw(dev)->conf.flags & IEEE80211_CONF_OFFCHANNEL)
36 mt76x02_resync_beacon_timer(dev);
38 ieee80211_iterate_active_interfaces_atomic(mt76_hw(dev),
39 IEEE80211_IFACE_ITER_RESUME_ALL,
40 mt76x02_update_beacon_iter, dev);
42 mt76_csa_check(&dev->mt76);
44 if (dev->mt76.csa_complete)
47 mt76x02_enqueue_buffered_bc(dev, &data, 8);
49 if (!skb_queue_len(&data.q))
52 for (i = 0; i < ARRAY_SIZE(data.tail); i++) {
56 mt76_skb_set_moredata(data.tail[i], false);
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;
65 mt76_tx_queue_skb(dev, MT_TXQ_PSD, skb, &mvif->group_wcid,
68 spin_unlock_bh(&q->lock);
71 static void mt76x02e_pre_tbtt_enable(struct mt76x02_dev *dev, bool en)
74 tasklet_enable(&dev->mt76.pre_tbtt_tasklet);
76 tasklet_disable(&dev->mt76.pre_tbtt_tasklet);
79 static void mt76x02e_beacon_enable(struct mt76x02_dev *dev, bool en)
81 mt76_rmw_field(dev, MT_INT_TIMER_EN, MT_INT_TIMER_EN_PRE_TBTT_EN, en);
83 mt76x02_irq_enable(dev, MT_INT_PRE_TBTT | MT_INT_TBTT);
85 mt76x02_irq_disable(dev, MT_INT_PRE_TBTT | MT_INT_TBTT);
88 void mt76x02e_init_beacon_config(struct mt76x02_dev *dev)
90 static const struct mt76x02_beacon_ops beacon_ops = {
93 .pre_tbtt_enable = mt76x02e_pre_tbtt_enable,
94 .beacon_enable = mt76x02e_beacon_enable,
97 dev->beacon_ops = &beacon_ops;
99 /* Fire a pre-TBTT interrupt 8 ms before TBTT */
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,
103 mt76_wr(dev, MT_INT_TIMER_EN, 0);
105 mt76x02_init_beacon_config(dev);
107 EXPORT_SYMBOL_GPL(mt76x02e_init_beacon_config);
110 mt76x02_init_tx_queue(struct mt76x02_dev *dev, struct mt76_sw_queue *q,
113 struct mt76_queue *hwq;
116 hwq = devm_kzalloc(dev->mt76.dev, sizeof(*hwq), GFP_KERNEL);
120 err = mt76_queue_alloc(dev, hwq, idx, n_desc, 0, MT_TX_RING_BASE);
124 INIT_LIST_HEAD(&q->swq);
127 mt76x02_irq_enable(dev, MT_INT_TX_DONE(idx));
133 mt76x02_init_rx_queue(struct mt76x02_dev *dev, struct mt76_queue *q,
134 int idx, int n_desc, int bufsize)
138 err = mt76_queue_alloc(dev, q, idx, n_desc, bufsize,
143 mt76x02_irq_enable(dev, MT_INT_RX_DONE(idx));
148 static void mt76x02_process_tx_status_fifo(struct mt76x02_dev *dev)
150 struct mt76x02_tx_status stat;
153 while (kfifo_get(&dev->txstatus_fifo, &stat))
154 mt76x02_send_tx_status(dev, &stat, &update);
157 static void mt76x02_tx_tasklet(unsigned long data)
159 struct mt76x02_dev *dev = (struct mt76x02_dev *)data;
161 mt76x02_mac_poll_tx_status(dev, false);
162 mt76x02_process_tx_status_fifo(dev);
164 mt76_txq_schedule_all(&dev->mt76);
167 static int mt76x02_poll_tx(struct napi_struct *napi, int budget)
169 struct mt76x02_dev *dev = container_of(napi, struct mt76x02_dev,
173 mt76x02_mac_poll_tx_status(dev, false);
175 for (i = MT_TXQ_MCU; i >= 0; i--)
176 mt76_queue_tx_cleanup(dev, i, false);
178 if (napi_complete_done(napi, 0))
179 mt76x02_irq_enable(dev, MT_INT_TX_DONE_ALL);
181 for (i = MT_TXQ_MCU; i >= 0; i--)
182 mt76_queue_tx_cleanup(dev, i, false);
184 tasklet_schedule(&dev->mt76.tx_tasklet);
189 int mt76x02_dma_init(struct mt76x02_dev *dev)
191 struct mt76_txwi_cache __maybe_unused *t;
192 int i, ret, fifo_size;
193 struct mt76_queue *q;
196 BUILD_BUG_ON(sizeof(struct mt76x02_rxwi) > MT_RX_HEADROOM);
198 fifo_size = roundup_pow_of_two(32 * sizeof(struct mt76x02_tx_status));
199 status_fifo = devm_kzalloc(dev->mt76.dev, fifo_size, GFP_KERNEL);
203 tasklet_init(&dev->mt76.tx_tasklet, mt76x02_tx_tasklet,
204 (unsigned long) dev);
205 tasklet_init(&dev->mt76.pre_tbtt_tasklet, mt76x02_pre_tbtt_tasklet,
208 spin_lock_init(&dev->txstatus_fifo_lock);
209 kfifo_init(&dev->txstatus_fifo, status_fifo, fifo_size);
211 mt76_dma_attach(&dev->mt76);
213 mt76_wr(dev, MT_WPDMA_RST_IDX, ~0);
215 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
216 ret = mt76x02_init_tx_queue(dev, &dev->mt76.q_tx[i],
223 ret = mt76x02_init_tx_queue(dev, &dev->mt76.q_tx[MT_TXQ_PSD],
224 MT_TX_HW_QUEUE_MGMT, MT_TX_RING_SIZE);
228 ret = mt76x02_init_tx_queue(dev, &dev->mt76.q_tx[MT_TXQ_MCU],
229 MT_TX_HW_QUEUE_MCU, MT_MCU_RING_SIZE);
233 ret = mt76x02_init_rx_queue(dev, &dev->mt76.q_rx[MT_RXQ_MCU], 1,
234 MT_MCU_RING_SIZE, MT_RX_BUF_SIZE);
238 q = &dev->mt76.q_rx[MT_RXQ_MAIN];
239 q->buf_offset = MT_RX_HEADROOM - sizeof(struct mt76x02_rxwi);
240 ret = mt76x02_init_rx_queue(dev, q, 0, MT76X02_RX_RING_SIZE,
245 ret = mt76_init_queues(dev);
249 netif_tx_napi_add(&dev->mt76.napi_dev, &dev->mt76.tx_napi,
250 mt76x02_poll_tx, NAPI_POLL_WEIGHT);
251 napi_enable(&dev->mt76.tx_napi);
255 EXPORT_SYMBOL_GPL(mt76x02_dma_init);
257 void mt76x02_rx_poll_complete(struct mt76_dev *mdev, enum mt76_rxq_id q)
259 struct mt76x02_dev *dev;
261 dev = container_of(mdev, struct mt76x02_dev, mt76);
262 mt76x02_irq_enable(dev, MT_INT_RX_DONE(q));
264 EXPORT_SYMBOL_GPL(mt76x02_rx_poll_complete);
266 irqreturn_t mt76x02_irq_handler(int irq, void *dev_instance)
268 struct mt76x02_dev *dev = dev_instance;
271 intr = mt76_rr(dev, MT_INT_SOURCE_CSR);
272 mt76_wr(dev, MT_INT_SOURCE_CSR, intr);
274 if (!test_bit(MT76_STATE_INITIALIZED, &dev->mt76.state))
277 trace_dev_irq(dev, intr, dev->mt76.mmio.irqmask);
279 intr &= dev->mt76.mmio.irqmask;
281 if (intr & MT_INT_RX_DONE(0)) {
282 mt76x02_irq_disable(dev, MT_INT_RX_DONE(0));
283 napi_schedule(&dev->mt76.napi[0]);
286 if (intr & MT_INT_RX_DONE(1)) {
287 mt76x02_irq_disable(dev, MT_INT_RX_DONE(1));
288 napi_schedule(&dev->mt76.napi[1]);
291 if (intr & MT_INT_PRE_TBTT)
292 tasklet_schedule(&dev->mt76.pre_tbtt_tasklet);
294 /* send buffered multicast frames now */
295 if (intr & MT_INT_TBTT) {
296 if (dev->mt76.csa_complete)
297 mt76_csa_finish(&dev->mt76);
299 mt76_queue_kick(dev, dev->mt76.q_tx[MT_TXQ_PSD].q);
302 if (intr & MT_INT_TX_STAT)
303 mt76x02_mac_poll_tx_status(dev, true);
305 if (intr & (MT_INT_TX_STAT | MT_INT_TX_DONE_ALL)) {
306 mt76x02_irq_disable(dev, MT_INT_TX_DONE_ALL);
307 napi_schedule(&dev->mt76.tx_napi);
310 if (intr & MT_INT_GPTIMER) {
311 mt76x02_irq_disable(dev, MT_INT_GPTIMER);
312 tasklet_schedule(&dev->dfs_pd.dfs_tasklet);
317 EXPORT_SYMBOL_GPL(mt76x02_irq_handler);
319 static void mt76x02_dma_enable(struct mt76x02_dev *dev)
323 mt76_wr(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_ENABLE_TX);
324 mt76x02_wait_for_wpdma(&dev->mt76, 1000);
325 usleep_range(50, 100);
327 val = FIELD_PREP(MT_WPDMA_GLO_CFG_DMA_BURST_SIZE, 3) |
328 MT_WPDMA_GLO_CFG_TX_DMA_EN |
329 MT_WPDMA_GLO_CFG_RX_DMA_EN;
330 mt76_set(dev, MT_WPDMA_GLO_CFG, val);
331 mt76_clear(dev, MT_WPDMA_GLO_CFG,
332 MT_WPDMA_GLO_CFG_TX_WRITEBACK_DONE);
335 void mt76x02_dma_cleanup(struct mt76x02_dev *dev)
337 tasklet_kill(&dev->mt76.tx_tasklet);
338 mt76_dma_cleanup(&dev->mt76);
340 EXPORT_SYMBOL_GPL(mt76x02_dma_cleanup);
342 void mt76x02_dma_disable(struct mt76x02_dev *dev)
344 u32 val = mt76_rr(dev, MT_WPDMA_GLO_CFG);
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);
352 EXPORT_SYMBOL_GPL(mt76x02_dma_disable);
354 void mt76x02_mac_start(struct mt76x02_dev *dev)
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 |
365 EXPORT_SYMBOL_GPL(mt76x02_mac_start);
367 static bool mt76x02_tx_hang(struct mt76x02_dev *dev)
369 u32 dma_idx, prev_dma_idx;
370 struct mt76_queue *q;
373 for (i = 0; i < 4; i++) {
374 q = dev->mt76.q_tx[i].q;
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;
383 if (prev_dma_idx == dma_idx)
390 static 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)
394 struct mt76x02_dev *dev = hw->priv;
395 struct mt76_wcid *wcid;
400 wcid = (struct mt76_wcid *) sta->drv_priv;
402 if (wcid->hw_key_idx != key->keyidx || wcid->sw_iv)
405 mt76x02_mac_wcid_sync_pn(dev, wcid->idx, key);
408 static void mt76x02_reset_state(struct mt76x02_dev *dev)
412 lockdep_assert_held(&dev->mt76.mutex);
414 clear_bit(MT76_STATE_RUNNING, &dev->mt76.state);
417 ieee80211_iter_keys_rcu(dev->mt76.hw, NULL, mt76x02_key_sync, NULL);
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;
427 wcid = rcu_dereference_protected(dev->mt76.wcid[i],
428 lockdep_is_held(&dev->mt76.mutex));
432 priv = msta = container_of(wcid, struct mt76x02_sta, wcid);
433 sta = container_of(priv, struct ieee80211_sta, drv_priv);
436 vif = container_of(priv, struct ieee80211_vif, drv_priv);
438 __mt76_sta_remove(&dev->mt76, vif, sta);
439 memset(msta, 0, sizeof(*msta));
443 dev->mt76.beacon_mask = 0;
446 static void mt76x02_watchdog_reset(struct mt76x02_dev *dev)
448 u32 mask = dev->mt76.mmio.irqmask;
449 bool restart = dev->mt76.mcu_ops->mcu_restart;
452 ieee80211_stop_queues(dev->mt76.hw);
453 set_bit(MT76_RESET, &dev->mt76.state);
455 tasklet_disable(&dev->mt76.pre_tbtt_tasklet);
456 tasklet_disable(&dev->mt76.tx_tasklet);
457 napi_disable(&dev->mt76.tx_napi);
459 for (i = 0; i < ARRAY_SIZE(dev->mt76.napi); i++)
460 napi_disable(&dev->mt76.napi[i]);
462 mutex_lock(&dev->mt76.mutex);
465 mt76x02_reset_state(dev);
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);
472 mt76x02_irq_disable(dev, mask);
474 /* perform device reset */
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);
482 /* let fw reset DMA */
483 mt76_set(dev, 0x734, 0x3);
486 mt76_mcu_restart(dev);
488 for (i = 0; i < ARRAY_SIZE(dev->mt76.q_tx); i++)
489 mt76_queue_tx_cleanup(dev, i, true);
491 for (i = 0; i < ARRAY_SIZE(dev->mt76.q_rx); i++)
492 mt76_queue_rx_reset(dev, i);
494 mt76x02_mac_start(dev);
497 mt76_set(dev, MT_TXOP_CTRL_CFG, MT_TXOP_ED_CCA_EN);
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);
504 mt76x02_irq_enable(dev, mask);
506 mutex_unlock(&dev->mt76.mutex);
508 clear_bit(MT76_RESET, &dev->mt76.state);
510 tasklet_enable(&dev->mt76.tx_tasklet);
511 napi_enable(&dev->mt76.tx_napi);
512 napi_schedule(&dev->mt76.tx_napi);
514 tasklet_enable(&dev->mt76.pre_tbtt_tasklet);
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]);
522 mt76x02_mcu_function_select(dev, Q_SELECT, 1);
523 ieee80211_restart_hw(dev->mt76.hw);
525 ieee80211_wake_queues(dev->mt76.hw);
526 mt76_txq_schedule_all(&dev->mt76);
530 static void mt76x02_check_tx_hang(struct mt76x02_dev *dev)
532 if (mt76x02_tx_hang(dev)) {
533 if (++dev->tx_hang_check >= MT_TX_HANG_TH)
536 dev->tx_hang_check = 0;
539 if (dev->mcu_timeout)
545 mt76x02_watchdog_reset(dev);
547 mutex_lock(&dev->mt76.mmio.mcu.mutex);
548 dev->mcu_timeout = 0;
549 mutex_unlock(&dev->mt76.mmio.mcu.mutex);
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));
557 void mt76x02_wdt_work(struct work_struct *work)
559 struct mt76x02_dev *dev = container_of(work, struct mt76x02_dev,
562 mt76x02_check_tx_hang(dev);
564 ieee80211_queue_delayed_work(mt76_hw(dev), &dev->wdt_work,