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 spin_lock_bh(&dev->mt76.sta_poll_lock);
220 if (list_empty(&mlink->wcid.poll_list))
221 list_add_tail(&mlink->wcid.poll_list,
222 &dev->mt76.sta_poll_list);
223 spin_unlock_bh(&dev->mt76.sta_poll_lock);
224 }
225
226 mt792x_get_status_freq_info(status, chfreq);
227
228 switch (status->band) {
229 case NL80211_BAND_5GHZ:
230 sband = &mphy->sband_5g.sband;
231 break;
232 case NL80211_BAND_6GHZ:
233 sband = &mphy->sband_6g.sband;
234 break;
235 default:
236 sband = &mphy->sband_2g.sband;
237 break;
238 }
239
240 if (!sband->channels)
241 return -EINVAL;
242
243 if (mt76_is_mmio(&dev->mt76) && (rxd0 & csum_mask) == csum_mask &&
244 !(csum_status & (BIT(0) | BIT(2) | BIT(3))))
245 skb->ip_summed = CHECKSUM_UNNECESSARY;
246
247 if (rxd1 & MT_RXD1_NORMAL_FCS_ERR)
248 status->flag |= RX_FLAG_FAILED_FCS_CRC;
249
250 if (rxd1 & MT_RXD1_NORMAL_TKIP_MIC_ERR)
251 status->flag |= RX_FLAG_MMIC_ERROR;
252
253 if (FIELD_GET(MT_RXD1_NORMAL_SEC_MODE, rxd1) != 0 &&
254 !(rxd1 & (MT_RXD1_NORMAL_CLM | MT_RXD1_NORMAL_CM))) {
255 status->flag |= RX_FLAG_DECRYPTED;
256 status->flag |= RX_FLAG_IV_STRIPPED;
257 status->flag |= RX_FLAG_MMIC_STRIPPED | RX_FLAG_MIC_STRIPPED;
258 }
259
260 remove_pad = FIELD_GET(MT_RXD2_NORMAL_HDR_OFFSET, rxd2);
261
262 if (rxd2 & MT_RXD2_NORMAL_MAX_LEN_ERROR)
263 return -EINVAL;
264
265 rxd += 6;
266 if (rxd1 & MT_RXD1_NORMAL_GROUP_4) {
267 u32 v0 = le32_to_cpu(rxd[0]);
268 u32 v2 = le32_to_cpu(rxd[2]);
269
270 fc = cpu_to_le16(FIELD_GET(MT_RXD6_FRAME_CONTROL, v0));
271 seq_ctrl = FIELD_GET(MT_RXD8_SEQ_CTRL, v2);
272 qos_ctl = FIELD_GET(MT_RXD8_QOS_CTL, v2);
273
274 rxd += 4;
275 if ((u8 *)rxd - skb->data >= skb->len)
276 return -EINVAL;
277 }
278
279 if (rxd1 & MT_RXD1_NORMAL_GROUP_1) {
280 u8 *data = (u8 *)rxd;
281
282 if (status->flag & RX_FLAG_DECRYPTED) {
283 switch (FIELD_GET(MT_RXD1_NORMAL_SEC_MODE, rxd1)) {
284 case MT_CIPHER_AES_CCMP:
285 case MT_CIPHER_CCMP_CCX:
286 case MT_CIPHER_CCMP_256:
287 insert_ccmp_hdr =
288 FIELD_GET(MT_RXD2_NORMAL_FRAG, rxd2);
289 fallthrough;
290 case MT_CIPHER_TKIP:
291 case MT_CIPHER_TKIP_NO_MIC:
292 case MT_CIPHER_GCMP:
293 case MT_CIPHER_GCMP_256:
294 status->iv[0] = data[5];
295 status->iv[1] = data[4];
296 status->iv[2] = data[3];
297 status->iv[3] = data[2];
298 status->iv[4] = data[1];
299 status->iv[5] = data[0];
300 break;
301 default:
302 break;
303 }
304 }
305 rxd += 4;
306 if ((u8 *)rxd - skb->data >= skb->len)
307 return -EINVAL;
308 }
309
310 if (rxd1 & MT_RXD1_NORMAL_GROUP_2) {
311 status->timestamp = le32_to_cpu(rxd[0]);
312 status->flag |= RX_FLAG_MACTIME_START;
313
314 if (!(rxd2 & MT_RXD2_NORMAL_NON_AMPDU)) {
315 status->flag |= RX_FLAG_AMPDU_DETAILS;
316
317 /* all subframes of an A-MPDU have the same timestamp */
318 if (phy->rx_ampdu_ts != status->timestamp) {
319 if (!++phy->ampdu_ref)
320 phy->ampdu_ref++;
321 }
322 phy->rx_ampdu_ts = status->timestamp;
323
324 status->ampdu_ref = phy->ampdu_ref;
325 }
326
327 rxd += 2;
328 if ((u8 *)rxd - skb->data >= skb->len)
329 return -EINVAL;
330 }
331
332 /* RXD Group 3 - P-RXV */
333 if (rxd1 & MT_RXD1_NORMAL_GROUP_3) {
334 u32 v0, v1;
335 int ret;
336
337 rxv = rxd;
338 rxd += 2;
339 if ((u8 *)rxd - skb->data >= skb->len)
340 return -EINVAL;
341
342 v0 = le32_to_cpu(rxv[0]);
343 v1 = le32_to_cpu(rxv[1]);
344
345 if (v0 & MT_PRXV_HT_AD_CODE)
346 status->enc_flags |= RX_ENC_FLAG_LDPC;
347
348 ret = mt76_connac2_mac_fill_rx_rate(&dev->mt76, status, sband,
349 rxv, &mode);
350 if (ret < 0)
351 return ret;
352
353 if (rxd1 & MT_RXD1_NORMAL_GROUP_5) {
354 rxd += 6;
355 if ((u8 *)rxd - skb->data >= skb->len)
356 return -EINVAL;
357
358 rxv = rxd;
359 /* Monitor mode would use RCPI described in GROUP 5
360 * instead.
361 */
362 v1 = le32_to_cpu(rxv[0]);
363
364 rxd += 12;
365 if ((u8 *)rxd - skb->data >= skb->len)
366 return -EINVAL;
367 }
368
369 status->chains = mphy->antenna_mask;
370 status->chain_signal[0] = to_rssi(MT_PRXV_RCPI0, v1);
371 status->chain_signal[1] = to_rssi(MT_PRXV_RCPI1, v1);
372 status->chain_signal[2] = to_rssi(MT_PRXV_RCPI2, v1);
373 status->chain_signal[3] = to_rssi(MT_PRXV_RCPI3, v1);
374 status->signal = -128;
375 for (i = 0; i < hweight8(mphy->antenna_mask); i++) {
376 if (!(status->chains & BIT(i)) ||
377 status->chain_signal[i] >= 0)
378 continue;
379
380 status->signal = max(status->signal,
381 status->chain_signal[i]);
382 }
383 }
384
385 amsdu_info = FIELD_GET(MT_RXD4_NORMAL_PAYLOAD_FORMAT, rxd4);
386 status->amsdu = !!amsdu_info;
387 if (status->amsdu) {
388 status->first_amsdu = amsdu_info == MT_RXD4_FIRST_AMSDU_FRAME;
389 status->last_amsdu = amsdu_info == MT_RXD4_LAST_AMSDU_FRAME;
390 }
391
392 hdr_gap = (u8 *)rxd - skb->data + 2 * remove_pad;
393 if (hdr_trans && ieee80211_has_morefrags(fc)) {
394 struct ieee80211_vif *vif;
395 int err;
396
397 if (!msta || !msta->vif)
398 return -EINVAL;
399
400 vif = container_of((void *)msta->vif, struct ieee80211_vif,
401 drv_priv);
402 err = mt76_connac2_reverse_frag0_hdr_trans(vif, skb, hdr_gap);
403 if (err)
404 return err;
405
406 hdr_trans = false;
407 } else {
408 skb_pull(skb, hdr_gap);
409 if (!hdr_trans && status->amsdu) {
410 memmove(skb->data + 2, skb->data,
411 ieee80211_get_hdrlen_from_skb(skb));
412 skb_pull(skb, 2);
413 }
414 }
415
416 if (!hdr_trans) {
417 struct ieee80211_hdr *hdr;
418
419 if (insert_ccmp_hdr) {
420 u8 key_id = FIELD_GET(MT_RXD1_NORMAL_KEY_ID, rxd1);
421
422 mt76_insert_ccmp_hdr(skb, key_id);
423 }
424
425 hdr = mt76_skb_get_hdr(skb);
426 fc = hdr->frame_control;
427 if (ieee80211_is_data_qos(fc)) {
428 seq_ctrl = le16_to_cpu(hdr->seq_ctrl);
429 qos_ctl = *ieee80211_get_qos_ctl(hdr);
430 }
431 } else {
432 status->flag |= RX_FLAG_8023;
433 }
434
435 mt792x_mac_assoc_rssi(dev, skb);
436
437 if (rxv && mode >= MT_PHY_TYPE_HE_SU && !(status->flag & RX_FLAG_8023))
438 mt76_connac2_mac_decode_he_radiotap(&dev->mt76, skb, rxv, mode);
439
440 if (!status->wcid || !ieee80211_is_data_qos(fc))
441 return 0;
442
443 status->aggr = unicast && !ieee80211_is_qos_nullfunc(fc);
444 status->seqno = IEEE80211_SEQ_TO_SN(seq_ctrl);
445 status->qos_ctl = qos_ctl;
446
447 return 0;
448 }
449
mt7921_mac_add_txs(struct mt792x_dev * dev,void * data)450 void mt7921_mac_add_txs(struct mt792x_dev *dev, void *data)
451 {
452 struct mt792x_link_sta *mlink;
453 struct mt76_wcid *wcid;
454 __le32 *txs_data = data;
455 u16 wcidx;
456 u8 pid;
457
458 if (le32_get_bits(txs_data[0], MT_TXS0_TXS_FORMAT) > 1)
459 return;
460
461 wcidx = le32_get_bits(txs_data[2], MT_TXS2_WCID);
462 pid = le32_get_bits(txs_data[3], MT_TXS3_PID);
463
464 if (pid < MT_PACKET_ID_FIRST)
465 return;
466
467 if (wcidx >= MT792x_WTBL_SIZE)
468 return;
469
470 rcu_read_lock();
471
472 wcid = rcu_dereference(dev->mt76.wcid[wcidx]);
473 if (!wcid)
474 goto out;
475
476 mlink = container_of(wcid, struct mt792x_link_sta, wcid);
477
478 mt76_connac2_mac_add_txs_skb(&dev->mt76, wcid, pid, txs_data);
479 if (!wcid->sta)
480 goto out;
481
482 spin_lock_bh(&dev->mt76.sta_poll_lock);
483 if (list_empty(&mlink->wcid.poll_list))
484 list_add_tail(&mlink->wcid.poll_list, &dev->mt76.sta_poll_list);
485 spin_unlock_bh(&dev->mt76.sta_poll_lock);
486
487 out:
488 rcu_read_unlock();
489 }
490
mt7921_mac_tx_free(struct mt792x_dev * dev,void * data,int len)491 static void mt7921_mac_tx_free(struct mt792x_dev *dev, void *data, int len)
492 {
493 struct mt76_connac_tx_free *free = data;
494 __le32 *tx_info = (__le32 *)(data + sizeof(*free));
495 struct mt76_dev *mdev = &dev->mt76;
496 struct mt76_txwi_cache *txwi;
497 struct ieee80211_sta *sta = NULL;
498 struct mt76_wcid *wcid = NULL;
499 struct sk_buff *skb, *tmp;
500 void *end = data + len;
501 LIST_HEAD(free_list);
502 bool wake = false;
503 u8 i, count;
504
505 /* clean DMA queues and unmap buffers first */
506 mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[MT_TXQ_PSD], false);
507 mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[MT_TXQ_BE], false);
508
509 count = le16_get_bits(free->ctrl, MT_TX_FREE_MSDU_CNT);
510 if (WARN_ON_ONCE((void *)&tx_info[count] > end))
511 return;
512
513 for (i = 0; i < count; i++) {
514 u32 msdu, info = le32_to_cpu(tx_info[i]);
515 u8 stat;
516
517 /* 1'b1: new wcid pair.
518 * 1'b0: msdu_id with the same 'wcid pair' as above.
519 */
520 if (info & MT_TX_FREE_PAIR) {
521 struct mt792x_link_sta *mlink;
522 u16 idx;
523
524 count++;
525 idx = FIELD_GET(MT_TX_FREE_WLAN_ID, info);
526 wcid = rcu_dereference(dev->mt76.wcid[idx]);
527 sta = wcid_to_sta(wcid);
528 if (!sta)
529 continue;
530
531 mlink = container_of(wcid, struct mt792x_link_sta, wcid);
532 spin_lock_bh(&mdev->sta_poll_lock);
533 if (list_empty(&mlink->wcid.poll_list))
534 list_add_tail(&mlink->wcid.poll_list,
535 &mdev->sta_poll_list);
536 spin_unlock_bh(&mdev->sta_poll_lock);
537 continue;
538 }
539
540 msdu = FIELD_GET(MT_TX_FREE_MSDU_ID, info);
541 stat = FIELD_GET(MT_TX_FREE_STATUS, info);
542
543 if (wcid) {
544 wcid->stats.tx_retries +=
545 FIELD_GET(MT_TX_FREE_COUNT, info) - 1;
546 wcid->stats.tx_failed += !!stat;
547 }
548
549 txwi = mt76_token_release(mdev, msdu, &wake);
550 if (!txwi)
551 continue;
552
553 mt76_connac2_txwi_free(mdev, txwi, sta, &free_list);
554 }
555
556 if (wake)
557 mt76_set_tx_blocked(&dev->mt76, false);
558
559 list_for_each_entry_safe(skb, tmp, &free_list, list) {
560 skb_list_del_init(skb);
561 napi_consume_skb(skb, 1);
562 }
563
564 rcu_read_lock();
565 mt7921_mac_sta_poll(dev);
566 rcu_read_unlock();
567
568 mt76_worker_schedule(&dev->mt76.tx_worker);
569 }
570
mt7921_rx_check(struct mt76_dev * mdev,void * data,int len)571 bool mt7921_rx_check(struct mt76_dev *mdev, void *data, int len)
572 {
573 struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
574 __le32 *rxd = (__le32 *)data;
575 __le32 *end = (__le32 *)&rxd[len / 4];
576 enum rx_pkt_type type;
577
578 type = le32_get_bits(rxd[0], MT_RXD0_PKT_TYPE);
579
580 switch (type) {
581 case PKT_TYPE_TXRX_NOTIFY:
582 /* PKT_TYPE_TXRX_NOTIFY can be received only by mmio devices */
583 mt7921_mac_tx_free(dev, data, len); /* mmio */
584 return false;
585 case PKT_TYPE_TXS:
586 for (rxd += 2; rxd + 8 <= end; rxd += 8)
587 mt7921_mac_add_txs(dev, rxd);
588 return false;
589 default:
590 return true;
591 }
592 }
593 EXPORT_SYMBOL_GPL(mt7921_rx_check);
594
mt7921_queue_rx_skb(struct mt76_dev * mdev,enum mt76_rxq_id q,struct sk_buff * skb,u32 * info)595 void mt7921_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q,
596 struct sk_buff *skb, u32 *info)
597 {
598 struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
599 __le32 *rxd = (__le32 *)skb->data;
600 __le32 *end = (__le32 *)&skb->data[skb->len];
601 enum rx_pkt_type type;
602 u16 flag;
603
604 type = le32_get_bits(rxd[0], MT_RXD0_PKT_TYPE);
605 flag = le32_get_bits(rxd[0], MT_RXD0_PKT_FLAG);
606
607 if (type == PKT_TYPE_RX_EVENT && flag == 0x1)
608 type = PKT_TYPE_NORMAL_MCU;
609
610 switch (type) {
611 case PKT_TYPE_TXRX_NOTIFY:
612 /* PKT_TYPE_TXRX_NOTIFY can be received only by mmio devices */
613 mt7921_mac_tx_free(dev, skb->data, skb->len);
614 napi_consume_skb(skb, 1);
615 break;
616 case PKT_TYPE_RX_EVENT:
617 mt7921_mcu_rx_event(dev, skb);
618 break;
619 case PKT_TYPE_TXS:
620 for (rxd += 2; rxd + 8 <= end; rxd += 8)
621 mt7921_mac_add_txs(dev, rxd);
622 dev_kfree_skb(skb);
623 break;
624 case PKT_TYPE_NORMAL_MCU:
625 case PKT_TYPE_NORMAL:
626 if (!mt7921_mac_fill_rx(dev, skb)) {
627 mt76_rx(&dev->mt76, q, skb);
628 return;
629 }
630 fallthrough;
631 default:
632 dev_kfree_skb(skb);
633 break;
634 }
635 }
636 EXPORT_SYMBOL_GPL(mt7921_queue_rx_skb);
637
638 static void
mt7921_vif_connect_iter(void * priv,u8 * mac,struct ieee80211_vif * vif)639 mt7921_vif_connect_iter(void *priv, u8 *mac,
640 struct ieee80211_vif *vif)
641 {
642 struct mt792x_vif *mvif = (struct mt792x_vif *)vif->drv_priv;
643 struct mt792x_dev *dev = mvif->phy->dev;
644 struct ieee80211_hw *hw = mt76_hw(dev);
645
646 if (vif->type == NL80211_IFTYPE_STATION)
647 ieee80211_disconnect(vif, true);
648
649 mt76_connac_mcu_uni_add_dev(&dev->mphy, &vif->bss_conf,
650 &mvif->sta.deflink.wcid, true);
651 mt7921_mcu_set_tx(dev, vif);
652
653 if (vif->type == NL80211_IFTYPE_AP) {
654 mt76_connac_mcu_uni_add_bss(dev->phy.mt76, vif, &mvif->sta.deflink.wcid,
655 true, NULL);
656 mt7921_mcu_sta_update(dev, NULL, vif, true,
657 MT76_STA_INFO_STATE_NONE);
658 mt7921_mcu_uni_add_beacon_offload(dev, hw, vif, true);
659 }
660 }
661
662 /* system error recovery */
mt7921_mac_reset_work(struct work_struct * work)663 void mt7921_mac_reset_work(struct work_struct *work)
664 {
665 struct mt792x_dev *dev = container_of(work, struct mt792x_dev,
666 reset_work);
667 struct ieee80211_hw *hw = mt76_hw(dev);
668 struct mt76_connac_pm *pm = &dev->pm;
669 int i, ret;
670
671 dev_dbg(dev->mt76.dev, "chip reset\n");
672 set_bit(MT76_RESET, &dev->mphy.state);
673 dev->hw_full_reset = true;
674 ieee80211_stop_queues(hw);
675
676 cancel_delayed_work_sync(&dev->mphy.mac_work);
677 cancel_delayed_work_sync(&pm->ps_work);
678 cancel_work_sync(&pm->wake_work);
679
680 for (i = 0; i < 10; i++) {
681 mutex_lock(&dev->mt76.mutex);
682 ret = mt792x_dev_reset(dev);
683 mutex_unlock(&dev->mt76.mutex);
684
685 if (!ret)
686 break;
687 }
688
689 if (i == 10)
690 dev_err(dev->mt76.dev, "chip reset failed\n");
691
692 if (test_and_clear_bit(MT76_HW_SCANNING, &dev->mphy.state)) {
693 struct cfg80211_scan_info info = {
694 .aborted = true,
695 };
696
697 ieee80211_scan_completed(dev->mphy.hw, &info);
698 }
699
700 dev->hw_full_reset = false;
701 clear_bit(MT76_RESET, &dev->mphy.state);
702 pm->suspended = false;
703 ieee80211_wake_queues(hw);
704 ieee80211_iterate_active_interfaces(hw,
705 IEEE80211_IFACE_ITER_RESUME_ALL,
706 mt7921_vif_connect_iter, NULL);
707 mt76_connac_power_save_sched(&dev->mt76.phy, pm);
708 }
709
mt7921_coredump_work(struct work_struct * work)710 void mt7921_coredump_work(struct work_struct *work)
711 {
712 struct mt792x_dev *dev;
713 char *dump, *data;
714
715 dev = (struct mt792x_dev *)container_of(work, struct mt792x_dev,
716 coredump.work.work);
717
718 if (time_is_after_jiffies(dev->coredump.last_activity +
719 4 * MT76_CONNAC_COREDUMP_TIMEOUT)) {
720 queue_delayed_work(dev->mt76.wq, &dev->coredump.work,
721 MT76_CONNAC_COREDUMP_TIMEOUT);
722 return;
723 }
724
725 dump = vzalloc(MT76_CONNAC_COREDUMP_SZ);
726 data = dump;
727
728 while (true) {
729 struct sk_buff *skb;
730
731 spin_lock_bh(&dev->mt76.lock);
732 skb = __skb_dequeue(&dev->coredump.msg_list);
733 spin_unlock_bh(&dev->mt76.lock);
734
735 if (!skb)
736 break;
737
738 skb_pull(skb, sizeof(struct mt76_connac2_mcu_rxd));
739 if (!dump || data + skb->len - dump > MT76_CONNAC_COREDUMP_SZ) {
740 dev_kfree_skb(skb);
741 continue;
742 }
743
744 memcpy(data, skb->data, skb->len);
745 data += skb->len;
746
747 dev_kfree_skb(skb);
748 }
749
750 if (dump)
751 dev_coredumpv(dev->mt76.dev, dump, MT76_CONNAC_COREDUMP_SZ,
752 GFP_KERNEL);
753
754 mt792x_reset(&dev->mt76);
755 }
756
757 /* usb_sdio */
758 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)759 mt7921_usb_sdio_write_txwi(struct mt792x_dev *dev, struct mt76_wcid *wcid,
760 enum mt76_txq_id qid, struct ieee80211_sta *sta,
761 struct ieee80211_key_conf *key, int pid,
762 struct sk_buff *skb)
763 {
764 __le32 *txwi = (__le32 *)(skb->data - MT_SDIO_TXD_SIZE);
765
766 memset(txwi, 0, MT_SDIO_TXD_SIZE);
767 mt76_connac2_mac_write_txwi(&dev->mt76, txwi, skb, wcid, key, pid, qid, 0);
768 skb_push(skb, MT_SDIO_TXD_SIZE);
769 }
770
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)771 int mt7921_usb_sdio_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr,
772 enum mt76_txq_id qid, struct mt76_wcid *wcid,
773 struct ieee80211_sta *sta,
774 struct mt76_tx_info *tx_info)
775 {
776 struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
777 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_info->skb);
778 struct ieee80211_key_conf *key = info->control.hw_key;
779 struct sk_buff *skb = tx_info->skb;
780 int err, pad, pktid, type;
781
782 if (unlikely(tx_info->skb->len <= ETH_HLEN))
783 return -EINVAL;
784
785 err = skb_cow_head(skb, MT_SDIO_TXD_SIZE + MT_SDIO_HDR_SIZE);
786 if (err)
787 return err;
788
789 if (!wcid)
790 wcid = &dev->mt76.global_wcid;
791
792 if (sta) {
793 struct mt792x_sta *msta = (struct mt792x_sta *)sta->drv_priv;
794
795 if (time_after(jiffies, msta->deflink.last_txs + HZ / 4)) {
796 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
797 msta->deflink.last_txs = jiffies;
798 }
799 }
800
801 pktid = mt76_tx_status_skb_add(&dev->mt76, wcid, skb);
802 mt7921_usb_sdio_write_txwi(dev, wcid, qid, sta, key, pktid, skb);
803
804 type = mt76_is_sdio(mdev) ? MT7921_SDIO_DATA : 0;
805 mt792x_skb_add_usb_sdio_hdr(dev, skb, type);
806 pad = round_up(skb->len, 4) - skb->len;
807 if (mt76_is_usb(mdev))
808 pad += 4;
809
810 err = mt76_skb_adjust_pad(skb, pad);
811 if (err)
812 /* Release pktid in case of error. */
813 idr_remove(&wcid->pktid, pktid);
814
815 return err;
816 }
817 EXPORT_SYMBOL_GPL(mt7921_usb_sdio_tx_prepare_skb);
818
mt7921_usb_sdio_tx_complete_skb(struct mt76_dev * mdev,struct mt76_queue_entry * e)819 void mt7921_usb_sdio_tx_complete_skb(struct mt76_dev *mdev,
820 struct mt76_queue_entry *e)
821 {
822 __le32 *txwi = (__le32 *)(e->skb->data + MT_SDIO_HDR_SIZE);
823 unsigned int headroom = MT_SDIO_TXD_SIZE + MT_SDIO_HDR_SIZE;
824 struct ieee80211_sta *sta;
825 struct mt76_wcid *wcid;
826 u16 idx;
827
828 idx = le32_get_bits(txwi[1], MT_TXD1_WLAN_IDX);
829 wcid = rcu_dereference(mdev->wcid[idx]);
830 sta = wcid_to_sta(wcid);
831
832 if (sta && likely(e->skb->protocol != cpu_to_be16(ETH_P_PAE)))
833 mt76_connac2_tx_check_aggr(sta, txwi);
834
835 skb_pull(e->skb, headroom);
836 mt76_tx_complete_skb(mdev, e->wcid, e->skb);
837 }
838 EXPORT_SYMBOL_GPL(mt7921_usb_sdio_tx_complete_skb);
839
mt7921_usb_sdio_tx_status_data(struct mt76_dev * mdev,u8 * update)840 bool mt7921_usb_sdio_tx_status_data(struct mt76_dev *mdev, u8 *update)
841 {
842 struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
843
844 mt792x_mutex_acquire(dev);
845 mt7921_mac_sta_poll(dev);
846 mt792x_mutex_release(dev);
847
848 return false;
849 }
850 EXPORT_SYMBOL_GPL(mt7921_usb_sdio_tx_status_data);
851
852 #if IS_ENABLED(CONFIG_IPV6)
mt7921_set_ipv6_ns_work(struct work_struct * work)853 void mt7921_set_ipv6_ns_work(struct work_struct *work)
854 {
855 struct mt792x_dev *dev = container_of(work, struct mt792x_dev,
856 ipv6_ns_work);
857 struct sk_buff *skb;
858 int ret = 0;
859
860 do {
861 skb = skb_dequeue(&dev->ipv6_ns_list);
862
863 if (!skb)
864 break;
865
866 mt792x_mutex_acquire(dev);
867 ret = mt76_mcu_skb_send_msg(&dev->mt76, skb,
868 MCU_UNI_CMD(OFFLOAD), true);
869 mt792x_mutex_release(dev);
870
871 } while (!ret);
872
873 if (ret)
874 skb_queue_purge(&dev->ipv6_ns_list);
875 }
876 #endif
877