1 // SPDX-License-Identifier: ISC
2 /* Copyright (C) 2020 MediaTek Inc. */
3
4 #include <linux/devcoredump.h>
5 #include <linux/etherdevice.h>
6 #include <linux/timekeeping.h>
7 #include "mt7921.h"
8 #include "../dma.h"
9 #include "../mt76_connac2_mac.h"
10 #include "mcu.h"
11
12 #define MT_WTBL_TXRX_CAP_RATE_OFFSET 7
13 #define MT_WTBL_TXRX_RATE_G2_HE 24
14 #define MT_WTBL_TXRX_RATE_G2 12
15
16 #define MT_WTBL_AC0_CTT_OFFSET 20
17
mt7921_mac_wtbl_update(struct mt792x_dev * dev,int idx,u32 mask)18 bool mt7921_mac_wtbl_update(struct mt792x_dev *dev, int idx, u32 mask)
19 {
20 mt76_rmw(dev, MT_WTBL_UPDATE, MT_WTBL_UPDATE_WLAN_IDX,
21 FIELD_PREP(MT_WTBL_UPDATE_WLAN_IDX, idx) | mask);
22
23 return mt76_poll(dev, MT_WTBL_UPDATE, MT_WTBL_UPDATE_BUSY,
24 0, 5000);
25 }
26
mt7921_mac_wtbl_lmac_addr(int idx,u8 offset)27 static u32 mt7921_mac_wtbl_lmac_addr(int idx, u8 offset)
28 {
29 return MT_WTBL_LMAC_OFFS(idx, 0) + offset * 4;
30 }
31
mt7921_mac_sta_poll(struct mt792x_dev * dev)32 static void mt7921_mac_sta_poll(struct mt792x_dev *dev)
33 {
34 static const u8 ac_to_tid[] = {
35 [IEEE80211_AC_BE] = 0,
36 [IEEE80211_AC_BK] = 1,
37 [IEEE80211_AC_VI] = 4,
38 [IEEE80211_AC_VO] = 6
39 };
40 struct ieee80211_sta *sta;
41 struct mt792x_sta *msta;
42 struct mt792x_link_sta *mlink;
43 u32 tx_time[IEEE80211_NUM_ACS], rx_time[IEEE80211_NUM_ACS];
44 LIST_HEAD(sta_poll_list);
45 struct rate_info *rate;
46 s8 rssi[4];
47 int i;
48
49 spin_lock_bh(&dev->mt76.sta_poll_lock);
50 list_splice_init(&dev->mt76.sta_poll_list, &sta_poll_list);
51 spin_unlock_bh(&dev->mt76.sta_poll_lock);
52
53 while (true) {
54 bool clear = false;
55 u32 addr, val;
56 u16 idx;
57 u8 bw;
58
59 spin_lock_bh(&dev->mt76.sta_poll_lock);
60 if (list_empty(&sta_poll_list)) {
61 spin_unlock_bh(&dev->mt76.sta_poll_lock);
62 break;
63 }
64 mlink = list_first_entry(&sta_poll_list,
65 struct mt792x_link_sta,
66 wcid.poll_list);
67 msta = container_of(mlink, struct mt792x_sta, deflink);
68 list_del_init(&mlink->wcid.poll_list);
69 spin_unlock_bh(&dev->mt76.sta_poll_lock);
70
71 idx = mlink->wcid.idx;
72 addr = mt7921_mac_wtbl_lmac_addr(idx, MT_WTBL_AC0_CTT_OFFSET);
73
74 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
75 u32 tx_last = mlink->airtime_ac[i];
76 u32 rx_last = mlink->airtime_ac[i + 4];
77
78 mlink->airtime_ac[i] = mt76_rr(dev, addr);
79 mlink->airtime_ac[i + 4] = mt76_rr(dev, addr + 4);
80
81 tx_time[i] = mlink->airtime_ac[i] - tx_last;
82 rx_time[i] = mlink->airtime_ac[i + 4] - rx_last;
83
84 if ((tx_last | rx_last) & BIT(30))
85 clear = true;
86
87 addr += 8;
88 }
89
90 if (clear) {
91 mt7921_mac_wtbl_update(dev, idx,
92 MT_WTBL_UPDATE_ADM_COUNT_CLEAR);
93 memset(mlink->airtime_ac, 0, sizeof(mlink->airtime_ac));
94 }
95
96 if (!mlink->wcid.sta)
97 continue;
98
99 sta = container_of((void *)msta, struct ieee80211_sta,
100 drv_priv);
101 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
102 u8 q = mt76_connac_lmac_mapping(i);
103 u32 tx_cur = tx_time[q];
104 u32 rx_cur = rx_time[q];
105 u8 tid = ac_to_tid[i];
106
107 if (!tx_cur && !rx_cur)
108 continue;
109
110 ieee80211_sta_register_airtime(sta, tid, tx_cur,
111 rx_cur);
112 }
113
114 /* We don't support reading GI info from txs packets.
115 * For accurate tx status reporting and AQL improvement,
116 * we need to make sure that flags match so polling GI
117 * from per-sta counters directly.
118 */
119 rate = &mlink->wcid.rate;
120 addr = mt7921_mac_wtbl_lmac_addr(idx,
121 MT_WTBL_TXRX_CAP_RATE_OFFSET);
122 val = mt76_rr(dev, addr);
123
124 switch (rate->bw) {
125 case RATE_INFO_BW_160:
126 bw = IEEE80211_STA_RX_BW_160;
127 break;
128 case RATE_INFO_BW_80:
129 bw = IEEE80211_STA_RX_BW_80;
130 break;
131 case RATE_INFO_BW_40:
132 bw = IEEE80211_STA_RX_BW_40;
133 break;
134 default:
135 bw = IEEE80211_STA_RX_BW_20;
136 break;
137 }
138
139 if (rate->flags & RATE_INFO_FLAGS_HE_MCS) {
140 u8 offs = MT_WTBL_TXRX_RATE_G2_HE + 2 * bw;
141
142 rate->he_gi = (val & (0x3 << offs)) >> offs;
143 } else if (rate->flags &
144 (RATE_INFO_FLAGS_VHT_MCS | RATE_INFO_FLAGS_MCS)) {
145 if (val & BIT(MT_WTBL_TXRX_RATE_G2 + bw))
146 rate->flags |= RATE_INFO_FLAGS_SHORT_GI;
147 else
148 rate->flags &= ~RATE_INFO_FLAGS_SHORT_GI;
149 }
150
151 /* get signal strength of resp frames (CTS/BA/ACK) */
152 addr = mt7921_mac_wtbl_lmac_addr(idx, 30);
153 val = mt76_rr(dev, addr);
154
155 rssi[0] = to_rssi(GENMASK(7, 0), val);
156 rssi[1] = to_rssi(GENMASK(15, 8), val);
157 rssi[2] = to_rssi(GENMASK(23, 16), val);
158 rssi[3] = to_rssi(GENMASK(31, 14), val);
159
160 mlink->ack_signal =
161 mt76_rx_signal(msta->vif->phy->mt76->antenna_mask, rssi);
162
163 ewma_avg_signal_add(&mlink->avg_ack_signal, -mlink->ack_signal);
164 }
165 }
166
167 static int
mt7921_mac_fill_rx(struct mt792x_dev * dev,struct sk_buff * skb)168 mt7921_mac_fill_rx(struct mt792x_dev *dev, struct sk_buff *skb)
169 {
170 u32 csum_mask = MT_RXD0_NORMAL_IP_SUM | MT_RXD0_NORMAL_UDP_TCP_SUM;
171 struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb;
172 bool hdr_trans, unicast, insert_ccmp_hdr = false;
173 u8 chfreq, qos_ctl = 0, remove_pad, amsdu_info;
174 u16 hdr_gap;
175 __le32 *rxv = NULL, *rxd = (__le32 *)skb->data;
176 struct mt76_phy *mphy = &dev->mt76.phy;
177 struct mt792x_phy *phy = &dev->phy;
178 struct ieee80211_supported_band *sband;
179 u32 csum_status = *(u32 *)skb->cb;
180 u32 rxd0 = le32_to_cpu(rxd[0]);
181 u32 rxd1 = le32_to_cpu(rxd[1]);
182 u32 rxd2 = le32_to_cpu(rxd[2]);
183 u32 rxd3 = le32_to_cpu(rxd[3]);
184 u32 rxd4 = le32_to_cpu(rxd[4]);
185 struct mt792x_sta *msta = NULL;
186 struct mt792x_link_sta *mlink;
187 u16 seq_ctrl = 0;
188 __le16 fc = 0;
189 u8 mode = 0;
190 int i, idx;
191
192 memset(status, 0, sizeof(*status));
193
194 if (rxd1 & MT_RXD1_NORMAL_BAND_IDX)
195 return -EINVAL;
196
197 if (!test_bit(MT76_STATE_RUNNING, &mphy->state))
198 return -EINVAL;
199
200 if (rxd2 & MT_RXD2_NORMAL_AMSDU_ERR)
201 return -EINVAL;
202
203 hdr_trans = rxd2 & MT_RXD2_NORMAL_HDR_TRANS;
204 if (hdr_trans && (rxd1 & MT_RXD1_NORMAL_CM))
205 return -EINVAL;
206
207 /* ICV error or CCMP/BIP/WPI MIC error */
208 if (rxd1 & MT_RXD1_NORMAL_ICV_ERR)
209 status->flag |= RX_FLAG_ONLY_MONITOR;
210
211 chfreq = FIELD_GET(MT_RXD3_NORMAL_CH_FREQ, rxd3);
212 unicast = FIELD_GET(MT_RXD3_NORMAL_ADDR_TYPE, rxd3) == MT_RXD3_NORMAL_U2M;
213 idx = FIELD_GET(MT_RXD1_NORMAL_WLAN_IDX, rxd1);
214 status->wcid = mt792x_rx_get_wcid(dev, idx, unicast);
215
216 if (status->wcid) {
217 mlink = container_of(status->wcid, struct mt792x_link_sta, wcid);
218 msta = container_of(mlink, struct mt792x_sta, deflink);
219 mt76_wcid_add_poll(&dev->mt76, &mlink->wcid);
220 }
221
222 mt792x_get_status_freq_info(status, chfreq);
223
224 switch (status->band) {
225 case NL80211_BAND_5GHZ:
226 sband = &mphy->sband_5g.sband;
227 break;
228 case NL80211_BAND_6GHZ:
229 sband = &mphy->sband_6g.sband;
230 break;
231 default:
232 sband = &mphy->sband_2g.sband;
233 break;
234 }
235
236 if (!sband->channels)
237 return -EINVAL;
238
239 if (mt76_is_mmio(&dev->mt76) && (rxd0 & csum_mask) == csum_mask &&
240 !(csum_status & (BIT(0) | BIT(2) | BIT(3))))
241 skb->ip_summed = CHECKSUM_UNNECESSARY;
242
243 if (rxd1 & MT_RXD1_NORMAL_FCS_ERR)
244 status->flag |= RX_FLAG_FAILED_FCS_CRC;
245
246 if (rxd1 & MT_RXD1_NORMAL_TKIP_MIC_ERR)
247 status->flag |= RX_FLAG_MMIC_ERROR;
248
249 if (FIELD_GET(MT_RXD1_NORMAL_SEC_MODE, rxd1) != 0 &&
250 !(rxd1 & (MT_RXD1_NORMAL_CLM | MT_RXD1_NORMAL_CM))) {
251 status->flag |= RX_FLAG_DECRYPTED;
252 status->flag |= RX_FLAG_IV_STRIPPED;
253 status->flag |= RX_FLAG_MMIC_STRIPPED | RX_FLAG_MIC_STRIPPED;
254 }
255
256 remove_pad = FIELD_GET(MT_RXD2_NORMAL_HDR_OFFSET, rxd2);
257
258 if (rxd2 & MT_RXD2_NORMAL_MAX_LEN_ERROR)
259 return -EINVAL;
260
261 rxd += 6;
262 if (rxd1 & MT_RXD1_NORMAL_GROUP_4) {
263 u32 v0 = le32_to_cpu(rxd[0]);
264 u32 v2 = le32_to_cpu(rxd[2]);
265
266 fc = cpu_to_le16(FIELD_GET(MT_RXD6_FRAME_CONTROL, v0));
267 seq_ctrl = FIELD_GET(MT_RXD8_SEQ_CTRL, v2);
268 qos_ctl = FIELD_GET(MT_RXD8_QOS_CTL, v2);
269
270 rxd += 4;
271 if ((u8 *)rxd - skb->data >= skb->len)
272 return -EINVAL;
273 }
274
275 if (rxd1 & MT_RXD1_NORMAL_GROUP_1) {
276 u8 *data = (u8 *)rxd;
277
278 if (status->flag & RX_FLAG_DECRYPTED) {
279 switch (FIELD_GET(MT_RXD1_NORMAL_SEC_MODE, rxd1)) {
280 case MT_CIPHER_AES_CCMP:
281 case MT_CIPHER_CCMP_CCX:
282 case MT_CIPHER_CCMP_256:
283 insert_ccmp_hdr =
284 FIELD_GET(MT_RXD2_NORMAL_FRAG, rxd2);
285 fallthrough;
286 case MT_CIPHER_TKIP:
287 case MT_CIPHER_TKIP_NO_MIC:
288 case MT_CIPHER_GCMP:
289 case MT_CIPHER_GCMP_256:
290 status->iv[0] = data[5];
291 status->iv[1] = data[4];
292 status->iv[2] = data[3];
293 status->iv[3] = data[2];
294 status->iv[4] = data[1];
295 status->iv[5] = data[0];
296 break;
297 default:
298 break;
299 }
300 }
301 rxd += 4;
302 if ((u8 *)rxd - skb->data >= skb->len)
303 return -EINVAL;
304 }
305
306 if (rxd1 & MT_RXD1_NORMAL_GROUP_2) {
307 status->timestamp = le32_to_cpu(rxd[0]);
308 status->flag |= RX_FLAG_MACTIME_START;
309
310 if (!(rxd2 & MT_RXD2_NORMAL_NON_AMPDU)) {
311 status->flag |= RX_FLAG_AMPDU_DETAILS;
312
313 /* all subframes of an A-MPDU have the same timestamp */
314 if (phy->rx_ampdu_ts != status->timestamp) {
315 if (!++phy->ampdu_ref)
316 phy->ampdu_ref++;
317 }
318 phy->rx_ampdu_ts = status->timestamp;
319
320 status->ampdu_ref = phy->ampdu_ref;
321 }
322
323 rxd += 2;
324 if ((u8 *)rxd - skb->data >= skb->len)
325 return -EINVAL;
326 }
327
328 /* RXD Group 3 - P-RXV */
329 if (rxd1 & MT_RXD1_NORMAL_GROUP_3) {
330 u32 v0, v1;
331 int ret;
332
333 rxv = rxd;
334 rxd += 2;
335 if ((u8 *)rxd - skb->data >= skb->len)
336 return -EINVAL;
337
338 v0 = le32_to_cpu(rxv[0]);
339 v1 = le32_to_cpu(rxv[1]);
340
341 if (v0 & MT_PRXV_HT_AD_CODE)
342 status->enc_flags |= RX_ENC_FLAG_LDPC;
343
344 ret = mt76_connac2_mac_fill_rx_rate(&dev->mt76, status, sband,
345 rxv, &mode);
346 if (ret < 0)
347 return ret;
348
349 if (rxd1 & MT_RXD1_NORMAL_GROUP_5) {
350 rxd += 6;
351 if ((u8 *)rxd - skb->data >= skb->len)
352 return -EINVAL;
353
354 rxv = rxd;
355 /* Monitor mode would use RCPI described in GROUP 5
356 * instead.
357 */
358 v1 = le32_to_cpu(rxv[0]);
359
360 rxd += 12;
361 if ((u8 *)rxd - skb->data >= skb->len)
362 return -EINVAL;
363 }
364
365 status->chains = mphy->antenna_mask;
366 status->chain_signal[0] = to_rssi(MT_PRXV_RCPI0, v1);
367 status->chain_signal[1] = to_rssi(MT_PRXV_RCPI1, v1);
368 status->chain_signal[2] = to_rssi(MT_PRXV_RCPI2, v1);
369 status->chain_signal[3] = to_rssi(MT_PRXV_RCPI3, v1);
370 status->signal = -128;
371 for (i = 0; i < hweight8(mphy->antenna_mask); i++) {
372 if (!(status->chains & BIT(i)) ||
373 status->chain_signal[i] >= 0)
374 continue;
375
376 status->signal = max(status->signal,
377 status->chain_signal[i]);
378 }
379 }
380
381 amsdu_info = FIELD_GET(MT_RXD4_NORMAL_PAYLOAD_FORMAT, rxd4);
382 status->amsdu = !!amsdu_info;
383 if (status->amsdu) {
384 status->first_amsdu = amsdu_info == MT_RXD4_FIRST_AMSDU_FRAME;
385 status->last_amsdu = amsdu_info == MT_RXD4_LAST_AMSDU_FRAME;
386 }
387
388 hdr_gap = (u8 *)rxd - skb->data + 2 * remove_pad;
389 if (hdr_trans && ieee80211_has_morefrags(fc)) {
390 struct ieee80211_vif *vif;
391 int err;
392
393 if (!msta || !msta->vif)
394 return -EINVAL;
395
396 vif = container_of((void *)msta->vif, struct ieee80211_vif,
397 drv_priv);
398 err = mt76_connac2_reverse_frag0_hdr_trans(vif, skb, hdr_gap);
399 if (err)
400 return err;
401
402 hdr_trans = false;
403 } else {
404 skb_pull(skb, hdr_gap);
405 if (!hdr_trans && status->amsdu) {
406 memmove(skb->data + 2, skb->data,
407 ieee80211_get_hdrlen_from_skb(skb));
408 skb_pull(skb, 2);
409 }
410 }
411
412 if (!hdr_trans) {
413 struct ieee80211_hdr *hdr;
414
415 if (insert_ccmp_hdr) {
416 u8 key_id = FIELD_GET(MT_RXD1_NORMAL_KEY_ID, rxd1);
417
418 mt76_insert_ccmp_hdr(skb, key_id);
419 }
420
421 hdr = mt76_skb_get_hdr(skb);
422 fc = hdr->frame_control;
423 if (ieee80211_is_data_qos(fc)) {
424 seq_ctrl = le16_to_cpu(hdr->seq_ctrl);
425 qos_ctl = *ieee80211_get_qos_ctl(hdr);
426 }
427 } else {
428 status->flag |= RX_FLAG_8023;
429 }
430
431 mt792x_mac_assoc_rssi(dev, skb);
432
433 if (rxv && mode >= MT_PHY_TYPE_HE_SU && !(status->flag & RX_FLAG_8023))
434 mt76_connac2_mac_decode_he_radiotap(&dev->mt76, skb, rxv, mode);
435
436 if (!status->wcid || !ieee80211_is_data_qos(fc))
437 return 0;
438
439 status->aggr = unicast && !ieee80211_is_qos_nullfunc(fc);
440 status->seqno = IEEE80211_SEQ_TO_SN(seq_ctrl);
441 status->qos_ctl = qos_ctl;
442
443 return 0;
444 }
445
mt7921_mac_add_txs(struct mt792x_dev * dev,void * data)446 void mt7921_mac_add_txs(struct mt792x_dev *dev, void *data)
447 {
448 struct mt792x_link_sta *mlink;
449 struct mt76_wcid *wcid;
450 __le32 *txs_data = data;
451 u16 wcidx;
452 u8 pid;
453
454 if (le32_get_bits(txs_data[0], MT_TXS0_TXS_FORMAT) > 1)
455 return;
456
457 wcidx = le32_get_bits(txs_data[2], MT_TXS2_WCID);
458 pid = le32_get_bits(txs_data[3], MT_TXS3_PID);
459
460 if (pid < MT_PACKET_ID_FIRST)
461 return;
462
463 if (wcidx >= MT792x_WTBL_SIZE)
464 return;
465
466 rcu_read_lock();
467
468 wcid = rcu_dereference(dev->mt76.wcid[wcidx]);
469 if (!wcid)
470 goto out;
471
472 mlink = container_of(wcid, struct mt792x_link_sta, wcid);
473
474 mt76_connac2_mac_add_txs_skb(&dev->mt76, wcid, pid, txs_data);
475 if (!wcid->sta)
476 goto out;
477
478 mt76_wcid_add_poll(&dev->mt76, &mlink->wcid);
479
480 out:
481 rcu_read_unlock();
482 }
483
mt7921_mac_tx_free(struct mt792x_dev * dev,void * data,int len)484 static void mt7921_mac_tx_free(struct mt792x_dev *dev, void *data, int len)
485 {
486 struct mt76_connac_tx_free *free = data;
487 __le32 *tx_info = (__le32 *)(data + sizeof(*free));
488 struct mt76_dev *mdev = &dev->mt76;
489 struct mt76_txwi_cache *txwi;
490 struct ieee80211_sta *sta = NULL;
491 struct mt76_wcid *wcid = NULL;
492 struct sk_buff *skb, *tmp;
493 void *end = data + len;
494 LIST_HEAD(free_list);
495 bool wake = false;
496 u8 i, count;
497
498 /* clean DMA queues and unmap buffers first */
499 mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[MT_TXQ_PSD], false);
500 mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[MT_TXQ_BE], false);
501
502 count = le16_get_bits(free->ctrl, MT_TX_FREE_MSDU_CNT);
503 if (WARN_ON_ONCE((void *)&tx_info[count] > end))
504 return;
505
506 for (i = 0; i < count; i++) {
507 u32 msdu, info = le32_to_cpu(tx_info[i]);
508 u8 stat;
509
510 /* 1'b1: new wcid pair.
511 * 1'b0: msdu_id with the same 'wcid pair' as above.
512 */
513 if (info & MT_TX_FREE_PAIR) {
514 struct mt792x_link_sta *mlink;
515 u16 idx;
516
517 count++;
518 idx = FIELD_GET(MT_TX_FREE_WLAN_ID, info);
519 wcid = rcu_dereference(dev->mt76.wcid[idx]);
520 sta = wcid_to_sta(wcid);
521 if (!sta)
522 continue;
523
524 mlink = container_of(wcid, struct mt792x_link_sta, wcid);
525 mt76_wcid_add_poll(&dev->mt76, &mlink->wcid);
526 continue;
527 }
528
529 msdu = FIELD_GET(MT_TX_FREE_MSDU_ID, info);
530 stat = FIELD_GET(MT_TX_FREE_STATUS, info);
531
532 if (wcid) {
533 wcid->stats.tx_retries +=
534 FIELD_GET(MT_TX_FREE_COUNT, info) - 1;
535 wcid->stats.tx_failed += !!stat;
536 }
537
538 txwi = mt76_token_release(mdev, msdu, &wake);
539 if (!txwi)
540 continue;
541
542 mt76_connac2_txwi_free(mdev, txwi, sta, &free_list);
543 }
544
545 if (wake)
546 mt76_set_tx_blocked(&dev->mt76, false);
547
548 list_for_each_entry_safe(skb, tmp, &free_list, list) {
549 skb_list_del_init(skb);
550 napi_consume_skb(skb, 1);
551 }
552
553 rcu_read_lock();
554 mt7921_mac_sta_poll(dev);
555 rcu_read_unlock();
556
557 mt76_worker_schedule(&dev->mt76.tx_worker);
558 }
559
mt7921_rx_check(struct mt76_dev * mdev,void * data,int len)560 bool mt7921_rx_check(struct mt76_dev *mdev, void *data, int len)
561 {
562 struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
563 __le32 *rxd = (__le32 *)data;
564 __le32 *end = (__le32 *)&rxd[len / 4];
565 enum rx_pkt_type type;
566
567 type = le32_get_bits(rxd[0], MT_RXD0_PKT_TYPE);
568
569 switch (type) {
570 case PKT_TYPE_TXRX_NOTIFY:
571 /* PKT_TYPE_TXRX_NOTIFY can be received only by mmio devices */
572 mt7921_mac_tx_free(dev, data, len); /* mmio */
573 return false;
574 case PKT_TYPE_TXS:
575 for (rxd += 2; rxd + 8 <= end; rxd += 8)
576 mt7921_mac_add_txs(dev, rxd);
577 return false;
578 default:
579 return true;
580 }
581 }
582 EXPORT_SYMBOL_GPL(mt7921_rx_check);
583
mt7921_queue_rx_skb(struct mt76_dev * mdev,enum mt76_rxq_id q,struct sk_buff * skb,u32 * info)584 void mt7921_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q,
585 struct sk_buff *skb, u32 *info)
586 {
587 struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
588 __le32 *rxd = (__le32 *)skb->data;
589 __le32 *end = (__le32 *)&skb->data[skb->len];
590 enum rx_pkt_type type;
591 u16 flag;
592
593 type = le32_get_bits(rxd[0], MT_RXD0_PKT_TYPE);
594 flag = le32_get_bits(rxd[0], MT_RXD0_PKT_FLAG);
595
596 if (type == PKT_TYPE_RX_EVENT && flag == 0x1)
597 type = PKT_TYPE_NORMAL_MCU;
598
599 switch (type) {
600 case PKT_TYPE_TXRX_NOTIFY:
601 /* PKT_TYPE_TXRX_NOTIFY can be received only by mmio devices */
602 mt7921_mac_tx_free(dev, skb->data, skb->len);
603 napi_consume_skb(skb, 1);
604 break;
605 case PKT_TYPE_RX_EVENT:
606 mt7921_mcu_rx_event(dev, skb);
607 break;
608 case PKT_TYPE_TXS:
609 for (rxd += 2; rxd + 8 <= end; rxd += 8)
610 mt7921_mac_add_txs(dev, rxd);
611 dev_kfree_skb(skb);
612 break;
613 case PKT_TYPE_NORMAL_MCU:
614 case PKT_TYPE_NORMAL:
615 if (!mt7921_mac_fill_rx(dev, skb)) {
616 mt76_rx(&dev->mt76, q, skb);
617 return;
618 }
619 fallthrough;
620 default:
621 dev_kfree_skb(skb);
622 break;
623 }
624 }
625 EXPORT_SYMBOL_GPL(mt7921_queue_rx_skb);
626
627 static void
mt7921_vif_connect_iter(void * priv,u8 * mac,struct ieee80211_vif * vif)628 mt7921_vif_connect_iter(void *priv, u8 *mac,
629 struct ieee80211_vif *vif)
630 {
631 struct mt792x_vif *mvif = (struct mt792x_vif *)vif->drv_priv;
632 struct mt792x_dev *dev = mvif->phy->dev;
633 struct ieee80211_hw *hw = mt76_hw(dev);
634
635 if (vif->type == NL80211_IFTYPE_STATION)
636 ieee80211_disconnect(vif, true);
637
638 mt76_connac_mcu_uni_add_dev(&dev->mphy, &vif->bss_conf,
639 &mvif->bss_conf.mt76,
640 &mvif->sta.deflink.wcid, true);
641 mt7921_mcu_set_tx(dev, vif);
642
643 if (vif->type == NL80211_IFTYPE_AP) {
644 mt76_connac_mcu_uni_add_bss(dev->phy.mt76, vif, &mvif->sta.deflink.wcid,
645 true, NULL);
646 mt7921_mcu_sta_update(dev, NULL, vif, true,
647 MT76_STA_INFO_STATE_NONE);
648 mt7921_mcu_uni_add_beacon_offload(dev, hw, vif, true);
649 }
650 }
651
652 /* system error recovery */
mt7921_mac_reset_work(struct work_struct * work)653 void mt7921_mac_reset_work(struct work_struct *work)
654 {
655 struct mt792x_dev *dev = container_of(work, struct mt792x_dev,
656 reset_work);
657 struct ieee80211_hw *hw = mt76_hw(dev);
658 struct mt76_connac_pm *pm = &dev->pm;
659 int i, ret;
660
661 dev_dbg(dev->mt76.dev, "chip reset\n");
662 set_bit(MT76_RESET, &dev->mphy.state);
663 dev->hw_full_reset = true;
664 ieee80211_stop_queues(hw);
665
666 cancel_delayed_work_sync(&dev->mphy.mac_work);
667 cancel_delayed_work_sync(&pm->ps_work);
668 cancel_work_sync(&pm->wake_work);
669
670 for (i = 0; i < 10; i++) {
671 mutex_lock(&dev->mt76.mutex);
672 ret = mt792x_dev_reset(dev);
673 mutex_unlock(&dev->mt76.mutex);
674
675 if (!ret)
676 break;
677 }
678
679 if (i == 10)
680 dev_err(dev->mt76.dev, "chip reset failed\n");
681
682 if (test_and_clear_bit(MT76_HW_SCANNING, &dev->mphy.state)) {
683 struct cfg80211_scan_info info = {
684 .aborted = true,
685 };
686
687 ieee80211_scan_completed(dev->mphy.hw, &info);
688 }
689
690 dev->hw_full_reset = false;
691 clear_bit(MT76_RESET, &dev->mphy.state);
692 pm->suspended = false;
693 ieee80211_wake_queues(hw);
694 ieee80211_iterate_active_interfaces(hw,
695 IEEE80211_IFACE_ITER_RESUME_ALL,
696 mt7921_vif_connect_iter, NULL);
697 mt76_connac_power_save_sched(&dev->mt76.phy, pm);
698 }
699
mt7921_coredump_work(struct work_struct * work)700 void mt7921_coredump_work(struct work_struct *work)
701 {
702 struct mt792x_dev *dev;
703 char *dump, *data;
704
705 dev = (struct mt792x_dev *)container_of(work, struct mt792x_dev,
706 coredump.work.work);
707
708 if (time_is_after_jiffies(dev->coredump.last_activity +
709 4 * MT76_CONNAC_COREDUMP_TIMEOUT)) {
710 queue_delayed_work(dev->mt76.wq, &dev->coredump.work,
711 MT76_CONNAC_COREDUMP_TIMEOUT);
712 return;
713 }
714
715 dump = vzalloc(MT76_CONNAC_COREDUMP_SZ);
716 data = dump;
717
718 while (true) {
719 struct sk_buff *skb;
720
721 spin_lock_bh(&dev->mt76.lock);
722 skb = __skb_dequeue(&dev->coredump.msg_list);
723 spin_unlock_bh(&dev->mt76.lock);
724
725 if (!skb)
726 break;
727
728 skb_pull(skb, sizeof(struct mt76_connac2_mcu_rxd));
729 if (!dump || data + skb->len - dump > MT76_CONNAC_COREDUMP_SZ) {
730 dev_kfree_skb(skb);
731 continue;
732 }
733
734 memcpy(data, skb->data, skb->len);
735 data += skb->len;
736
737 dev_kfree_skb(skb);
738 }
739
740 if (dump)
741 dev_coredumpv(dev->mt76.dev, dump, MT76_CONNAC_COREDUMP_SZ,
742 GFP_KERNEL);
743
744 mt792x_reset(&dev->mt76);
745 }
746
747 /* usb_sdio */
748 static void
mt7921_usb_sdio_write_txwi(struct mt792x_dev * dev,struct mt76_wcid * wcid,enum mt76_txq_id qid,struct ieee80211_sta * sta,struct ieee80211_key_conf * key,int pid,struct sk_buff * skb)749 mt7921_usb_sdio_write_txwi(struct mt792x_dev *dev, struct mt76_wcid *wcid,
750 enum mt76_txq_id qid, struct ieee80211_sta *sta,
751 struct ieee80211_key_conf *key, int pid,
752 struct sk_buff *skb)
753 {
754 __le32 *txwi = (__le32 *)(skb->data - MT_SDIO_TXD_SIZE);
755
756 memset(txwi, 0, MT_SDIO_TXD_SIZE);
757 mt76_connac2_mac_write_txwi(&dev->mt76, txwi, skb, wcid, key, pid, qid, 0);
758 skb_push(skb, MT_SDIO_TXD_SIZE);
759 }
760
mt7921_usb_sdio_tx_prepare_skb(struct mt76_dev * mdev,void * txwi_ptr,enum mt76_txq_id qid,struct mt76_wcid * wcid,struct ieee80211_sta * sta,struct mt76_tx_info * tx_info)761 int mt7921_usb_sdio_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr,
762 enum mt76_txq_id qid, struct mt76_wcid *wcid,
763 struct ieee80211_sta *sta,
764 struct mt76_tx_info *tx_info)
765 {
766 struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
767 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_info->skb);
768 struct ieee80211_key_conf *key = info->control.hw_key;
769 struct sk_buff *skb = tx_info->skb;
770 int err, pad, pktid, type;
771
772 if (unlikely(tx_info->skb->len <= ETH_HLEN))
773 return -EINVAL;
774
775 err = skb_cow_head(skb, MT_SDIO_TXD_SIZE + MT_SDIO_HDR_SIZE);
776 if (err)
777 return err;
778
779 if (!wcid)
780 wcid = &dev->mt76.global_wcid;
781
782 if (sta) {
783 struct mt792x_sta *msta = (struct mt792x_sta *)sta->drv_priv;
784
785 if (time_after(jiffies, msta->deflink.last_txs + HZ / 4)) {
786 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
787 msta->deflink.last_txs = jiffies;
788 }
789 }
790
791 pktid = mt76_tx_status_skb_add(&dev->mt76, wcid, skb);
792 mt7921_usb_sdio_write_txwi(dev, wcid, qid, sta, key, pktid, skb);
793
794 type = mt76_is_sdio(mdev) ? MT7921_SDIO_DATA : 0;
795 mt792x_skb_add_usb_sdio_hdr(dev, skb, type);
796 pad = round_up(skb->len, 4) - skb->len;
797 if (mt76_is_usb(mdev))
798 pad += 4;
799
800 err = mt76_skb_adjust_pad(skb, pad);
801 if (err)
802 /* Release pktid in case of error. */
803 idr_remove(&wcid->pktid, pktid);
804
805 return err;
806 }
807 EXPORT_SYMBOL_GPL(mt7921_usb_sdio_tx_prepare_skb);
808
mt7921_usb_sdio_tx_complete_skb(struct mt76_dev * mdev,struct mt76_queue_entry * e)809 void mt7921_usb_sdio_tx_complete_skb(struct mt76_dev *mdev,
810 struct mt76_queue_entry *e)
811 {
812 __le32 *txwi = (__le32 *)(e->skb->data + MT_SDIO_HDR_SIZE);
813 unsigned int headroom = MT_SDIO_TXD_SIZE + MT_SDIO_HDR_SIZE;
814 struct ieee80211_sta *sta;
815 struct mt76_wcid *wcid;
816 u16 idx;
817
818 idx = le32_get_bits(txwi[1], MT_TXD1_WLAN_IDX);
819 wcid = rcu_dereference(mdev->wcid[idx]);
820 sta = wcid_to_sta(wcid);
821
822 if (sta && likely(e->skb->protocol != cpu_to_be16(ETH_P_PAE)))
823 mt76_connac2_tx_check_aggr(sta, txwi);
824
825 skb_pull(e->skb, headroom);
826 mt76_tx_complete_skb(mdev, e->wcid, e->skb);
827 }
828 EXPORT_SYMBOL_GPL(mt7921_usb_sdio_tx_complete_skb);
829
mt7921_usb_sdio_tx_status_data(struct mt76_dev * mdev,u8 * update)830 bool mt7921_usb_sdio_tx_status_data(struct mt76_dev *mdev, u8 *update)
831 {
832 struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
833
834 mt792x_mutex_acquire(dev);
835 mt7921_mac_sta_poll(dev);
836 mt792x_mutex_release(dev);
837
838 return false;
839 }
840 EXPORT_SYMBOL_GPL(mt7921_usb_sdio_tx_status_data);
841
842 #if IS_ENABLED(CONFIG_IPV6)
mt7921_set_ipv6_ns_work(struct work_struct * work)843 void mt7921_set_ipv6_ns_work(struct work_struct *work)
844 {
845 struct mt792x_dev *dev = container_of(work, struct mt792x_dev,
846 ipv6_ns_work);
847 struct sk_buff *skb;
848 int ret = 0;
849
850 do {
851 skb = skb_dequeue(&dev->ipv6_ns_list);
852
853 if (!skb)
854 break;
855
856 mt792x_mutex_acquire(dev);
857 ret = mt76_mcu_skb_send_msg(&dev->mt76, skb,
858 MCU_UNI_CMD(OFFLOAD), true);
859 mt792x_mutex_release(dev);
860
861 } while (!ret);
862
863 if (ret)
864 skb_queue_purge(&dev->ipv6_ns_list);
865 }
866 #endif
867