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 #if defined(__FreeBSD__)
8 #include <linux/delay.h>
9 #endif
10 #include "mt7921.h"
11 #include "../dma.h"
12 #include "../mt76_connac2_mac.h"
13 #include "mcu.h"
14
15 #define MT_WTBL_TXRX_CAP_RATE_OFFSET 7
16 #define MT_WTBL_TXRX_RATE_G2_HE 24
17 #define MT_WTBL_TXRX_RATE_G2 12
18
19 #define MT_WTBL_AC0_CTT_OFFSET 20
20
mt7921_mac_wtbl_update(struct mt792x_dev * dev,int idx,u32 mask)21 bool mt7921_mac_wtbl_update(struct mt792x_dev *dev, int idx, u32 mask)
22 {
23 mt76_rmw(dev, MT_WTBL_UPDATE, MT_WTBL_UPDATE_WLAN_IDX,
24 FIELD_PREP(MT_WTBL_UPDATE_WLAN_IDX, idx) | mask);
25
26 return mt76_poll(dev, MT_WTBL_UPDATE, MT_WTBL_UPDATE_BUSY,
27 0, 5000);
28 }
29
mt7921_mac_wtbl_lmac_addr(int idx,u8 offset)30 static u32 mt7921_mac_wtbl_lmac_addr(int idx, u8 offset)
31 {
32 return MT_WTBL_LMAC_OFFS(idx, 0) + offset * 4;
33 }
34
mt7921_mac_sta_poll(struct mt792x_dev * dev)35 static void mt7921_mac_sta_poll(struct mt792x_dev *dev)
36 {
37 static const u8 ac_to_tid[] = {
38 [IEEE80211_AC_BE] = 0,
39 [IEEE80211_AC_BK] = 1,
40 [IEEE80211_AC_VI] = 4,
41 [IEEE80211_AC_VO] = 6
42 };
43 struct ieee80211_sta *sta;
44 struct mt792x_sta *msta;
45 struct mt792x_link_sta *mlink;
46 u32 tx_time[IEEE80211_NUM_ACS], rx_time[IEEE80211_NUM_ACS];
47 #if defined(__linux__)
48 LIST_HEAD(sta_poll_list);
49 #elif defined(__FreeBSD__)
50 LINUX_LIST_HEAD(sta_poll_list);
51 #endif
52 struct rate_info *rate;
53 s8 rssi[4];
54 int i;
55
56 spin_lock_bh(&dev->mt76.sta_poll_lock);
57 list_splice_init(&dev->mt76.sta_poll_list, &sta_poll_list);
58 spin_unlock_bh(&dev->mt76.sta_poll_lock);
59
60 while (true) {
61 bool clear = false;
62 u32 addr, val;
63 u16 idx;
64 u8 bw;
65
66 spin_lock_bh(&dev->mt76.sta_poll_lock);
67 if (list_empty(&sta_poll_list)) {
68 spin_unlock_bh(&dev->mt76.sta_poll_lock);
69 break;
70 }
71 mlink = list_first_entry(&sta_poll_list,
72 struct mt792x_link_sta,
73 wcid.poll_list);
74 msta = container_of(mlink, struct mt792x_sta, deflink);
75 list_del_init(&mlink->wcid.poll_list);
76 spin_unlock_bh(&dev->mt76.sta_poll_lock);
77
78 idx = mlink->wcid.idx;
79 addr = mt7921_mac_wtbl_lmac_addr(idx, MT_WTBL_AC0_CTT_OFFSET);
80
81 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
82 u32 tx_last = mlink->airtime_ac[i];
83 u32 rx_last = mlink->airtime_ac[i + 4];
84
85 mlink->airtime_ac[i] = mt76_rr(dev, addr);
86 mlink->airtime_ac[i + 4] = mt76_rr(dev, addr + 4);
87
88 tx_time[i] = mlink->airtime_ac[i] - tx_last;
89 rx_time[i] = mlink->airtime_ac[i + 4] - rx_last;
90
91 if ((tx_last | rx_last) & BIT(30))
92 clear = true;
93
94 addr += 8;
95 }
96
97 if (clear) {
98 mt7921_mac_wtbl_update(dev, idx,
99 MT_WTBL_UPDATE_ADM_COUNT_CLEAR);
100 memset(mlink->airtime_ac, 0, sizeof(mlink->airtime_ac));
101 }
102
103 if (!mlink->wcid.sta)
104 continue;
105
106 sta = container_of((void *)msta, struct ieee80211_sta,
107 drv_priv);
108 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
109 u8 q = mt76_connac_lmac_mapping(i);
110 u32 tx_cur = tx_time[q];
111 u32 rx_cur = rx_time[q];
112 u8 tid = ac_to_tid[i];
113
114 if (!tx_cur && !rx_cur)
115 continue;
116
117 ieee80211_sta_register_airtime(sta, tid, tx_cur,
118 rx_cur);
119 }
120
121 /* We don't support reading GI info from txs packets.
122 * For accurate tx status reporting and AQL improvement,
123 * we need to make sure that flags match so polling GI
124 * from per-sta counters directly.
125 */
126 rate = &mlink->wcid.rate;
127 addr = mt7921_mac_wtbl_lmac_addr(idx,
128 MT_WTBL_TXRX_CAP_RATE_OFFSET);
129 val = mt76_rr(dev, addr);
130
131 switch (rate->bw) {
132 case RATE_INFO_BW_160:
133 bw = IEEE80211_STA_RX_BW_160;
134 break;
135 case RATE_INFO_BW_80:
136 bw = IEEE80211_STA_RX_BW_80;
137 break;
138 case RATE_INFO_BW_40:
139 bw = IEEE80211_STA_RX_BW_40;
140 break;
141 default:
142 bw = IEEE80211_STA_RX_BW_20;
143 break;
144 }
145
146 if (rate->flags & RATE_INFO_FLAGS_HE_MCS) {
147 u8 offs = MT_WTBL_TXRX_RATE_G2_HE + 2 * bw;
148
149 rate->he_gi = (val & (0x3 << offs)) >> offs;
150 } else if (rate->flags &
151 (RATE_INFO_FLAGS_VHT_MCS | RATE_INFO_FLAGS_MCS)) {
152 if (val & BIT(MT_WTBL_TXRX_RATE_G2 + bw))
153 rate->flags |= RATE_INFO_FLAGS_SHORT_GI;
154 else
155 rate->flags &= ~RATE_INFO_FLAGS_SHORT_GI;
156 }
157
158 /* get signal strength of resp frames (CTS/BA/ACK) */
159 addr = mt7921_mac_wtbl_lmac_addr(idx, 30);
160 val = mt76_rr(dev, addr);
161
162 rssi[0] = to_rssi(GENMASK(7, 0), val);
163 rssi[1] = to_rssi(GENMASK(15, 8), val);
164 rssi[2] = to_rssi(GENMASK(23, 16), val);
165 rssi[3] = to_rssi(GENMASK(31, 14), val);
166
167 mlink->ack_signal =
168 mt76_rx_signal(msta->vif->phy->mt76->antenna_mask, rssi);
169
170 ewma_avg_signal_add(&mlink->avg_ack_signal, -mlink->ack_signal);
171 }
172 }
173
174 static int
mt7921_mac_fill_rx(struct mt792x_dev * dev,struct sk_buff * skb)175 mt7921_mac_fill_rx(struct mt792x_dev *dev, struct sk_buff *skb)
176 {
177 u32 csum_mask = MT_RXD0_NORMAL_IP_SUM | MT_RXD0_NORMAL_UDP_TCP_SUM;
178 struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb;
179 bool hdr_trans, unicast, insert_ccmp_hdr = false;
180 u8 chfreq, qos_ctl = 0, remove_pad, amsdu_info;
181 u16 hdr_gap;
182 __le32 *rxv = NULL, *rxd = (__le32 *)skb->data;
183 struct mt76_phy *mphy = &dev->mt76.phy;
184 struct mt792x_phy *phy = &dev->phy;
185 struct ieee80211_supported_band *sband;
186 u32 csum_status = *(u32 *)skb->cb;
187 u32 rxd0 = le32_to_cpu(rxd[0]);
188 u32 rxd1 = le32_to_cpu(rxd[1]);
189 u32 rxd2 = le32_to_cpu(rxd[2]);
190 u32 rxd3 = le32_to_cpu(rxd[3]);
191 u32 rxd4 = le32_to_cpu(rxd[4]);
192 struct mt792x_sta *msta = NULL;
193 struct mt792x_link_sta *mlink;
194 u16 seq_ctrl = 0;
195 __le16 fc = 0;
196 u8 mode = 0;
197 int i, idx;
198
199 memset(status, 0, sizeof(*status));
200
201 if (rxd1 & MT_RXD1_NORMAL_BAND_IDX)
202 return -EINVAL;
203
204 if (!test_bit(MT76_STATE_RUNNING, &mphy->state))
205 return -EINVAL;
206
207 if (rxd2 & MT_RXD2_NORMAL_AMSDU_ERR)
208 return -EINVAL;
209
210 hdr_trans = rxd2 & MT_RXD2_NORMAL_HDR_TRANS;
211 if (hdr_trans && (rxd1 & MT_RXD1_NORMAL_CM))
212 return -EINVAL;
213
214 /* ICV error or CCMP/BIP/WPI MIC error */
215 if (rxd1 & MT_RXD1_NORMAL_ICV_ERR)
216 status->flag |= RX_FLAG_ONLY_MONITOR;
217
218 chfreq = FIELD_GET(MT_RXD3_NORMAL_CH_FREQ, rxd3);
219 unicast = FIELD_GET(MT_RXD3_NORMAL_ADDR_TYPE, rxd3) == MT_RXD3_NORMAL_U2M;
220 idx = FIELD_GET(MT_RXD1_NORMAL_WLAN_IDX, rxd1);
221 status->wcid = mt792x_rx_get_wcid(dev, idx, unicast);
222
223 if (status->wcid) {
224 mlink = container_of(status->wcid, struct mt792x_link_sta, wcid);
225 msta = container_of(mlink, struct mt792x_sta, deflink);
226 mt76_wcid_add_poll(&dev->mt76, &mlink->wcid);
227 }
228
229 mt792x_get_status_freq_info(status, chfreq);
230
231 switch (status->band) {
232 case NL80211_BAND_5GHZ:
233 sband = &mphy->sband_5g.sband;
234 break;
235 case NL80211_BAND_6GHZ:
236 sband = &mphy->sband_6g.sband;
237 break;
238 default:
239 sband = &mphy->sband_2g.sband;
240 break;
241 }
242
243 if (!sband->channels)
244 return -EINVAL;
245
246 if (mt76_is_mmio(&dev->mt76) && (rxd0 & csum_mask) == csum_mask &&
247 !(csum_status & (BIT(0) | BIT(2) | BIT(3))))
248 skb->ip_summed = CHECKSUM_UNNECESSARY;
249
250 if (rxd1 & MT_RXD1_NORMAL_FCS_ERR)
251 status->flag |= RX_FLAG_FAILED_FCS_CRC;
252
253 if (rxd1 & MT_RXD1_NORMAL_TKIP_MIC_ERR)
254 status->flag |= RX_FLAG_MMIC_ERROR;
255
256 if (FIELD_GET(MT_RXD1_NORMAL_SEC_MODE, rxd1) != 0 &&
257 !(rxd1 & (MT_RXD1_NORMAL_CLM | MT_RXD1_NORMAL_CM))) {
258 status->flag |= RX_FLAG_DECRYPTED;
259 status->flag |= RX_FLAG_IV_STRIPPED;
260 status->flag |= RX_FLAG_MMIC_STRIPPED | RX_FLAG_MIC_STRIPPED;
261 }
262
263 remove_pad = FIELD_GET(MT_RXD2_NORMAL_HDR_OFFSET, rxd2);
264
265 if (rxd2 & MT_RXD2_NORMAL_MAX_LEN_ERROR)
266 return -EINVAL;
267
268 rxd += 6;
269 if (rxd1 & MT_RXD1_NORMAL_GROUP_4) {
270 u32 v0 = le32_to_cpu(rxd[0]);
271 u32 v2 = le32_to_cpu(rxd[2]);
272
273 fc = cpu_to_le16(FIELD_GET(MT_RXD6_FRAME_CONTROL, v0));
274 seq_ctrl = FIELD_GET(MT_RXD8_SEQ_CTRL, v2);
275 qos_ctl = FIELD_GET(MT_RXD8_QOS_CTL, v2);
276
277 rxd += 4;
278 if ((u8 *)rxd - skb->data >= skb->len)
279 return -EINVAL;
280 }
281
282 if (rxd1 & MT_RXD1_NORMAL_GROUP_1) {
283 u8 *data = (u8 *)rxd;
284
285 if (status->flag & RX_FLAG_DECRYPTED) {
286 switch (FIELD_GET(MT_RXD1_NORMAL_SEC_MODE, rxd1)) {
287 case MT_CIPHER_AES_CCMP:
288 case MT_CIPHER_CCMP_CCX:
289 case MT_CIPHER_CCMP_256:
290 insert_ccmp_hdr =
291 FIELD_GET(MT_RXD2_NORMAL_FRAG, rxd2);
292 fallthrough;
293 case MT_CIPHER_TKIP:
294 case MT_CIPHER_TKIP_NO_MIC:
295 case MT_CIPHER_GCMP:
296 case MT_CIPHER_GCMP_256:
297 status->iv[0] = data[5];
298 status->iv[1] = data[4];
299 status->iv[2] = data[3];
300 status->iv[3] = data[2];
301 status->iv[4] = data[1];
302 status->iv[5] = data[0];
303 break;
304 default:
305 break;
306 }
307 }
308 rxd += 4;
309 if ((u8 *)rxd - skb->data >= skb->len)
310 return -EINVAL;
311 }
312
313 if (rxd1 & MT_RXD1_NORMAL_GROUP_2) {
314 status->timestamp = le32_to_cpu(rxd[0]);
315 status->flag |= RX_FLAG_MACTIME_START;
316
317 if (!(rxd2 & MT_RXD2_NORMAL_NON_AMPDU)) {
318 status->flag |= RX_FLAG_AMPDU_DETAILS;
319
320 /* all subframes of an A-MPDU have the same timestamp */
321 if (phy->rx_ampdu_ts != status->timestamp) {
322 if (!++phy->ampdu_ref)
323 phy->ampdu_ref++;
324 }
325 phy->rx_ampdu_ts = status->timestamp;
326
327 status->ampdu_ref = phy->ampdu_ref;
328 }
329
330 rxd += 2;
331 if ((u8 *)rxd - skb->data >= skb->len)
332 return -EINVAL;
333 }
334
335 /* RXD Group 3 - P-RXV */
336 if (rxd1 & MT_RXD1_NORMAL_GROUP_3) {
337 u32 v0, v1;
338 int ret;
339
340 rxv = rxd;
341 rxd += 2;
342 if ((u8 *)rxd - skb->data >= skb->len)
343 return -EINVAL;
344
345 v0 = le32_to_cpu(rxv[0]);
346 v1 = le32_to_cpu(rxv[1]);
347
348 if (v0 & MT_PRXV_HT_AD_CODE)
349 status->enc_flags |= RX_ENC_FLAG_LDPC;
350
351 ret = mt76_connac2_mac_fill_rx_rate(&dev->mt76, status, sband,
352 rxv, &mode);
353 if (ret < 0)
354 return ret;
355
356 if (rxd1 & MT_RXD1_NORMAL_GROUP_5) {
357 rxd += 6;
358 if ((u8 *)rxd - skb->data >= skb->len)
359 return -EINVAL;
360
361 rxv = rxd;
362 /* Monitor mode would use RCPI described in GROUP 5
363 * instead.
364 */
365 v1 = le32_to_cpu(rxv[0]);
366
367 rxd += 12;
368 if ((u8 *)rxd - skb->data >= skb->len)
369 return -EINVAL;
370 }
371
372 status->chains = mphy->antenna_mask;
373 status->chain_signal[0] = to_rssi(MT_PRXV_RCPI0, v1);
374 status->chain_signal[1] = to_rssi(MT_PRXV_RCPI1, v1);
375 status->chain_signal[2] = to_rssi(MT_PRXV_RCPI2, v1);
376 status->chain_signal[3] = to_rssi(MT_PRXV_RCPI3, v1);
377 status->signal = -128;
378 for (i = 0; i < hweight8(mphy->antenna_mask); i++) {
379 if (!(status->chains & BIT(i)) ||
380 status->chain_signal[i] >= 0)
381 continue;
382
383 status->signal = max(status->signal,
384 status->chain_signal[i]);
385 }
386 }
387
388 amsdu_info = FIELD_GET(MT_RXD4_NORMAL_PAYLOAD_FORMAT, rxd4);
389 status->amsdu = !!amsdu_info;
390 if (status->amsdu) {
391 status->first_amsdu = amsdu_info == MT_RXD4_FIRST_AMSDU_FRAME;
392 status->last_amsdu = amsdu_info == MT_RXD4_LAST_AMSDU_FRAME;
393 }
394
395 hdr_gap = (u8 *)rxd - skb->data + 2 * remove_pad;
396 if (hdr_trans && ieee80211_has_morefrags(fc)) {
397 struct ieee80211_vif *vif;
398 int err;
399
400 if (!msta || !msta->vif)
401 return -EINVAL;
402
403 vif = container_of((void *)msta->vif, struct ieee80211_vif,
404 drv_priv);
405 err = mt76_connac2_reverse_frag0_hdr_trans(vif, skb, hdr_gap);
406 if (err)
407 return err;
408
409 hdr_trans = false;
410 } else {
411 skb_pull(skb, hdr_gap);
412 if (!hdr_trans && status->amsdu) {
413 memmove(skb->data + 2, skb->data,
414 ieee80211_get_hdrlen_from_skb(skb));
415 skb_pull(skb, 2);
416 }
417 }
418
419 if (!hdr_trans) {
420 struct ieee80211_hdr *hdr;
421
422 if (insert_ccmp_hdr) {
423 u8 key_id = FIELD_GET(MT_RXD1_NORMAL_KEY_ID, rxd1);
424
425 mt76_insert_ccmp_hdr(skb, key_id);
426 }
427
428 hdr = mt76_skb_get_hdr(skb);
429 fc = hdr->frame_control;
430 if (ieee80211_is_data_qos(fc)) {
431 seq_ctrl = le16_to_cpu(hdr->seq_ctrl);
432 qos_ctl = *ieee80211_get_qos_ctl(hdr);
433 }
434 } else {
435 status->flag |= RX_FLAG_8023;
436 }
437
438 mt792x_mac_assoc_rssi(dev, skb);
439
440 if (rxv && mode >= MT_PHY_TYPE_HE_SU && !(status->flag & RX_FLAG_8023))
441 mt76_connac2_mac_decode_he_radiotap(&dev->mt76, skb, rxv, mode);
442
443 if (!status->wcid || !ieee80211_is_data_qos(fc))
444 return 0;
445
446 status->aggr = unicast && !ieee80211_is_qos_nullfunc(fc);
447 status->seqno = IEEE80211_SEQ_TO_SN(seq_ctrl);
448 status->qos_ctl = qos_ctl;
449
450 return 0;
451 }
452
mt7921_mac_add_txs(struct mt792x_dev * dev,void * data)453 void mt7921_mac_add_txs(struct mt792x_dev *dev, void *data)
454 {
455 struct mt792x_link_sta *mlink;
456 struct mt76_wcid *wcid;
457 __le32 *txs_data = data;
458 u16 wcidx;
459 u8 pid;
460
461 if (le32_get_bits(txs_data[0], MT_TXS0_TXS_FORMAT) > 1)
462 return;
463
464 wcidx = le32_get_bits(txs_data[2], MT_TXS2_WCID);
465 pid = le32_get_bits(txs_data[3], MT_TXS3_PID);
466
467 if (pid < MT_PACKET_ID_FIRST)
468 return;
469
470 if (wcidx >= MT792x_WTBL_SIZE)
471 return;
472
473 rcu_read_lock();
474
475 wcid = rcu_dereference(dev->mt76.wcid[wcidx]);
476 if (!wcid)
477 goto out;
478
479 mlink = container_of(wcid, struct mt792x_link_sta, wcid);
480
481 mt76_connac2_mac_add_txs_skb(&dev->mt76, wcid, pid, txs_data);
482 if (!wcid->sta)
483 goto out;
484
485 mt76_wcid_add_poll(&dev->mt76, &mlink->wcid);
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 #if defined(__linux__)
495 __le32 *tx_info = (__le32 *)(data + sizeof(*free));
496 #elif defined(__FreeBSD__)
497 __le32 *tx_info = (__le32 *)((u8 *)data + sizeof(*free));
498 #endif
499 struct mt76_dev *mdev = &dev->mt76;
500 struct mt76_txwi_cache *txwi;
501 struct ieee80211_sta *sta = NULL;
502 struct mt76_wcid *wcid = NULL;
503 struct sk_buff *skb, *tmp;
504 #if defined(__linux__)
505 void *end = data + len;
506 #elif defined(__FreeBSD__)
507 void *end = (u8 *)data + len;
508 #endif
509 LIST_HEAD(free_list);
510 bool wake = false;
511 u8 i, count;
512
513 /* clean DMA queues and unmap buffers first */
514 mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[MT_TXQ_PSD], false);
515 mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[MT_TXQ_BE], false);
516
517 count = le16_get_bits(free->ctrl, MT_TX_FREE_MSDU_CNT);
518 if (WARN_ON_ONCE((void *)&tx_info[count] > end))
519 return;
520
521 for (i = 0; i < count; i++) {
522 u32 msdu, info = le32_to_cpu(tx_info[i]);
523 u8 stat;
524
525 /* 1'b1: new wcid pair.
526 * 1'b0: msdu_id with the same 'wcid pair' as above.
527 */
528 if (info & MT_TX_FREE_PAIR) {
529 struct mt792x_link_sta *mlink;
530 u16 idx;
531
532 count++;
533 idx = FIELD_GET(MT_TX_FREE_WLAN_ID, info);
534 wcid = rcu_dereference(dev->mt76.wcid[idx]);
535 sta = wcid_to_sta(wcid);
536 if (!sta)
537 continue;
538
539 mlink = container_of(wcid, struct mt792x_link_sta, wcid);
540 mt76_wcid_add_poll(&dev->mt76, &mlink->wcid);
541 continue;
542 }
543
544 msdu = FIELD_GET(MT_TX_FREE_MSDU_ID, info);
545 stat = FIELD_GET(MT_TX_FREE_STATUS, info);
546
547 if (wcid) {
548 wcid->stats.tx_retries +=
549 FIELD_GET(MT_TX_FREE_COUNT, info) - 1;
550 wcid->stats.tx_failed += !!stat;
551 }
552
553 txwi = mt76_token_release(mdev, msdu, &wake);
554 if (!txwi)
555 continue;
556
557 mt76_connac2_txwi_free(mdev, txwi, sta, &free_list);
558 }
559
560 if (wake)
561 mt76_set_tx_blocked(&dev->mt76, false);
562
563 list_for_each_entry_safe(skb, tmp, &free_list, list) {
564 skb_list_del_init(skb);
565 napi_consume_skb(skb, 1);
566 }
567
568 rcu_read_lock();
569 mt7921_mac_sta_poll(dev);
570 rcu_read_unlock();
571
572 mt76_worker_schedule(&dev->mt76.tx_worker);
573 }
574
mt7921_rx_check(struct mt76_dev * mdev,void * data,int len)575 bool mt7921_rx_check(struct mt76_dev *mdev, void *data, int len)
576 {
577 struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
578 __le32 *rxd = (__le32 *)data;
579 __le32 *end = (__le32 *)&rxd[len / 4];
580 enum rx_pkt_type type;
581
582 type = le32_get_bits(rxd[0], MT_RXD0_PKT_TYPE);
583
584 switch (type) {
585 case PKT_TYPE_TXRX_NOTIFY:
586 /* PKT_TYPE_TXRX_NOTIFY can be received only by mmio devices */
587 mt7921_mac_tx_free(dev, data, len); /* mmio */
588 return false;
589 case PKT_TYPE_TXS:
590 for (rxd += 2; rxd + 8 <= end; rxd += 8)
591 mt7921_mac_add_txs(dev, rxd);
592 return false;
593 default:
594 return true;
595 }
596 }
597 EXPORT_SYMBOL_GPL(mt7921_rx_check);
598
mt7921_queue_rx_skb(struct mt76_dev * mdev,enum mt76_rxq_id q,struct sk_buff * skb,u32 * info)599 void mt7921_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q,
600 struct sk_buff *skb, u32 *info)
601 {
602 struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
603 __le32 *rxd = (__le32 *)skb->data;
604 __le32 *end = (__le32 *)&skb->data[skb->len];
605 enum rx_pkt_type type;
606 u16 flag;
607
608 type = le32_get_bits(rxd[0], MT_RXD0_PKT_TYPE);
609 flag = le32_get_bits(rxd[0], MT_RXD0_PKT_FLAG);
610
611 if (type == PKT_TYPE_RX_EVENT && flag == 0x1)
612 type = PKT_TYPE_NORMAL_MCU;
613
614 switch (type) {
615 case PKT_TYPE_TXRX_NOTIFY:
616 /* PKT_TYPE_TXRX_NOTIFY can be received only by mmio devices */
617 mt7921_mac_tx_free(dev, skb->data, skb->len);
618 napi_consume_skb(skb, 1);
619 break;
620 case PKT_TYPE_RX_EVENT:
621 mt7921_mcu_rx_event(dev, skb);
622 break;
623 case PKT_TYPE_TXS:
624 for (rxd += 2; rxd + 8 <= end; rxd += 8)
625 mt7921_mac_add_txs(dev, rxd);
626 dev_kfree_skb(skb);
627 break;
628 case PKT_TYPE_NORMAL_MCU:
629 case PKT_TYPE_NORMAL:
630 if (!mt7921_mac_fill_rx(dev, skb)) {
631 mt76_rx(&dev->mt76, q, skb);
632 return;
633 }
634 fallthrough;
635 default:
636 dev_kfree_skb(skb);
637 break;
638 }
639 }
640 EXPORT_SYMBOL_GPL(mt7921_queue_rx_skb);
641
642 static void
mt7921_vif_connect_iter(void * priv,u8 * mac,struct ieee80211_vif * vif)643 mt7921_vif_connect_iter(void *priv, u8 *mac,
644 struct ieee80211_vif *vif)
645 {
646 struct mt792x_vif *mvif = (struct mt792x_vif *)vif->drv_priv;
647 struct mt792x_dev *dev = mvif->phy->dev;
648 struct ieee80211_hw *hw = mt76_hw(dev);
649
650 if (vif->type == NL80211_IFTYPE_STATION)
651 ieee80211_disconnect(vif, true);
652
653 mt76_connac_mcu_uni_add_dev(&dev->mphy, &vif->bss_conf,
654 &mvif->bss_conf.mt76,
655 &mvif->sta.deflink.wcid, true);
656 mt7921_mcu_set_tx(dev, vif);
657
658 if (vif->type == NL80211_IFTYPE_AP) {
659 mt76_connac_mcu_uni_add_bss(dev->phy.mt76, vif, &mvif->sta.deflink.wcid,
660 true, NULL);
661 mt7921_mcu_sta_update(dev, NULL, vif, true,
662 MT76_STA_INFO_STATE_NONE);
663 mt7921_mcu_uni_add_beacon_offload(dev, hw, vif, true);
664 }
665 }
666
667 /* system error recovery */
mt7921_mac_reset_work(struct work_struct * work)668 void mt7921_mac_reset_work(struct work_struct *work)
669 {
670 struct mt792x_dev *dev = container_of(work, struct mt792x_dev,
671 reset_work);
672 struct ieee80211_hw *hw = mt76_hw(dev);
673 struct mt76_connac_pm *pm = &dev->pm;
674 int i, ret;
675
676 dev_dbg(dev->mt76.dev, "chip reset\n");
677 set_bit(MT76_RESET, &dev->mphy.state);
678 dev->hw_full_reset = true;
679 ieee80211_stop_queues(hw);
680
681 cancel_delayed_work_sync(&dev->mphy.mac_work);
682 cancel_delayed_work_sync(&pm->ps_work);
683 cancel_work_sync(&pm->wake_work);
684
685 for (i = 0; i < 10; i++) {
686 mutex_lock(&dev->mt76.mutex);
687 ret = mt792x_dev_reset(dev);
688 mutex_unlock(&dev->mt76.mutex);
689
690 if (!ret)
691 break;
692 }
693
694 if (i == 10)
695 dev_err(dev->mt76.dev, "chip reset failed\n");
696
697 if (test_and_clear_bit(MT76_HW_SCANNING, &dev->mphy.state)) {
698 struct cfg80211_scan_info info = {
699 .aborted = true,
700 };
701
702 ieee80211_scan_completed(dev->mphy.hw, &info);
703 }
704
705 dev->hw_full_reset = false;
706 clear_bit(MT76_RESET, &dev->mphy.state);
707 pm->suspended = false;
708 ieee80211_wake_queues(hw);
709 ieee80211_iterate_active_interfaces(hw,
710 IEEE80211_IFACE_ITER_RESUME_ALL,
711 mt7921_vif_connect_iter, NULL);
712 mt76_connac_power_save_sched(&dev->mt76.phy, pm);
713 }
714
mt7921_coredump_work(struct work_struct * work)715 void mt7921_coredump_work(struct work_struct *work)
716 {
717 struct mt792x_dev *dev;
718 char *dump, *data;
719
720 dev = (struct mt792x_dev *)container_of(work, struct mt792x_dev,
721 coredump.work.work);
722
723 if (time_is_after_jiffies(dev->coredump.last_activity +
724 4 * MT76_CONNAC_COREDUMP_TIMEOUT)) {
725 queue_delayed_work(dev->mt76.wq, &dev->coredump.work,
726 MT76_CONNAC_COREDUMP_TIMEOUT);
727 return;
728 }
729
730 dump = vzalloc(MT76_CONNAC_COREDUMP_SZ);
731 data = dump;
732
733 while (true) {
734 struct sk_buff *skb;
735
736 spin_lock_bh(&dev->mt76.lock);
737 skb = __skb_dequeue(&dev->coredump.msg_list);
738 spin_unlock_bh(&dev->mt76.lock);
739
740 if (!skb)
741 break;
742
743 skb_pull(skb, sizeof(struct mt76_connac2_mcu_rxd));
744 if (!dump || data + skb->len - dump > MT76_CONNAC_COREDUMP_SZ) {
745 dev_kfree_skb(skb);
746 continue;
747 }
748
749 memcpy(data, skb->data, skb->len);
750 data += skb->len;
751
752 dev_kfree_skb(skb);
753 }
754
755 if (dump)
756 dev_coredumpv(dev->mt76.dev, dump, MT76_CONNAC_COREDUMP_SZ,
757 GFP_KERNEL);
758
759 mt792x_reset(&dev->mt76);
760 }
761
762 /* usb_sdio */
763 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)764 mt7921_usb_sdio_write_txwi(struct mt792x_dev *dev, struct mt76_wcid *wcid,
765 enum mt76_txq_id qid, struct ieee80211_sta *sta,
766 struct ieee80211_key_conf *key, int pid,
767 struct sk_buff *skb)
768 {
769 __le32 *txwi = (__le32 *)(skb->data - MT_SDIO_TXD_SIZE);
770
771 memset(txwi, 0, MT_SDIO_TXD_SIZE);
772 mt76_connac2_mac_write_txwi(&dev->mt76, txwi, skb, wcid, key, pid, qid, 0);
773 skb_push(skb, MT_SDIO_TXD_SIZE);
774 }
775
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)776 int mt7921_usb_sdio_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr,
777 enum mt76_txq_id qid, struct mt76_wcid *wcid,
778 struct ieee80211_sta *sta,
779 struct mt76_tx_info *tx_info)
780 {
781 struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
782 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_info->skb);
783 struct ieee80211_key_conf *key = info->control.hw_key;
784 struct sk_buff *skb = tx_info->skb;
785 int err, pad, pktid, type;
786
787 if (unlikely(tx_info->skb->len <= ETH_HLEN))
788 return -EINVAL;
789
790 err = skb_cow_head(skb, MT_SDIO_TXD_SIZE + MT_SDIO_HDR_SIZE);
791 if (err)
792 return err;
793
794 if (!wcid)
795 wcid = &dev->mt76.global_wcid;
796
797 if (sta) {
798 struct mt792x_sta *msta = (struct mt792x_sta *)sta->drv_priv;
799
800 if (time_after(jiffies, msta->deflink.last_txs + HZ / 4)) {
801 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
802 msta->deflink.last_txs = jiffies;
803 }
804 }
805
806 pktid = mt76_tx_status_skb_add(&dev->mt76, wcid, skb);
807 mt7921_usb_sdio_write_txwi(dev, wcid, qid, sta, key, pktid, skb);
808
809 type = mt76_is_sdio(mdev) ? MT7921_SDIO_DATA : 0;
810 mt792x_skb_add_usb_sdio_hdr(dev, skb, type);
811 pad = round_up(skb->len, 4) - skb->len;
812 if (mt76_is_usb(mdev))
813 pad += 4;
814
815 err = mt76_skb_adjust_pad(skb, pad);
816 if (err)
817 /* Release pktid in case of error. */
818 idr_remove(&wcid->pktid, pktid);
819
820 return err;
821 }
822 EXPORT_SYMBOL_GPL(mt7921_usb_sdio_tx_prepare_skb);
823
mt7921_usb_sdio_tx_complete_skb(struct mt76_dev * mdev,struct mt76_queue_entry * e)824 void mt7921_usb_sdio_tx_complete_skb(struct mt76_dev *mdev,
825 struct mt76_queue_entry *e)
826 {
827 __le32 *txwi = (__le32 *)(e->skb->data + MT_SDIO_HDR_SIZE);
828 unsigned int headroom = MT_SDIO_TXD_SIZE + MT_SDIO_HDR_SIZE;
829 struct ieee80211_sta *sta;
830 struct mt76_wcid *wcid;
831 u16 idx;
832
833 idx = le32_get_bits(txwi[1], MT_TXD1_WLAN_IDX);
834 wcid = rcu_dereference(mdev->wcid[idx]);
835 sta = wcid_to_sta(wcid);
836
837 if (sta && likely(e->skb->protocol != cpu_to_be16(ETH_P_PAE)))
838 mt76_connac2_tx_check_aggr(sta, txwi);
839
840 skb_pull(e->skb, headroom);
841 mt76_tx_complete_skb(mdev, e->wcid, e->skb);
842 }
843 EXPORT_SYMBOL_GPL(mt7921_usb_sdio_tx_complete_skb);
844
mt7921_usb_sdio_tx_status_data(struct mt76_dev * mdev,u8 * update)845 bool mt7921_usb_sdio_tx_status_data(struct mt76_dev *mdev, u8 *update)
846 {
847 struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
848
849 mt792x_mutex_acquire(dev);
850 mt7921_mac_sta_poll(dev);
851 mt792x_mutex_release(dev);
852
853 return false;
854 }
855 EXPORT_SYMBOL_GPL(mt7921_usb_sdio_tx_status_data);
856
857 #if IS_ENABLED(CONFIG_IPV6)
mt7921_set_ipv6_ns_work(struct work_struct * work)858 void mt7921_set_ipv6_ns_work(struct work_struct *work)
859 {
860 struct mt792x_dev *dev = container_of(work, struct mt792x_dev,
861 ipv6_ns_work);
862 struct sk_buff *skb;
863 int ret = 0;
864
865 do {
866 skb = skb_dequeue(&dev->ipv6_ns_list);
867
868 if (!skb)
869 break;
870
871 mt792x_mutex_acquire(dev);
872 ret = mt76_mcu_skb_send_msg(&dev->mt76, skb,
873 MCU_UNI_CMD(OFFLOAD), true);
874 mt792x_mutex_release(dev);
875
876 } while (!ret);
877
878 if (ret)
879 skb_queue_purge(&dev->ipv6_ns_list);
880 }
881 #endif
882