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 u32 tx_time[IEEE80211_NUM_ACS], rx_time[IEEE80211_NUM_ACS];
43 LIST_HEAD(sta_poll_list);
44 struct rate_info *rate;
45 s8 rssi[4];
46 int i;
47
48 spin_lock_bh(&dev->mt76.sta_poll_lock);
49 list_splice_init(&dev->mt76.sta_poll_list, &sta_poll_list);
50 spin_unlock_bh(&dev->mt76.sta_poll_lock);
51
52 while (true) {
53 bool clear = false;
54 u32 addr, val;
55 u16 idx;
56 u8 bw;
57
58 spin_lock_bh(&dev->mt76.sta_poll_lock);
59 if (list_empty(&sta_poll_list)) {
60 spin_unlock_bh(&dev->mt76.sta_poll_lock);
61 break;
62 }
63 msta = list_first_entry(&sta_poll_list,
64 struct mt792x_sta, wcid.poll_list);
65 list_del_init(&msta->wcid.poll_list);
66 spin_unlock_bh(&dev->mt76.sta_poll_lock);
67
68 idx = msta->wcid.idx;
69 addr = mt7921_mac_wtbl_lmac_addr(idx, MT_WTBL_AC0_CTT_OFFSET);
70
71 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
72 u32 tx_last = msta->airtime_ac[i];
73 u32 rx_last = msta->airtime_ac[i + 4];
74
75 msta->airtime_ac[i] = mt76_rr(dev, addr);
76 msta->airtime_ac[i + 4] = mt76_rr(dev, addr + 4);
77
78 tx_time[i] = msta->airtime_ac[i] - tx_last;
79 rx_time[i] = msta->airtime_ac[i + 4] - rx_last;
80
81 if ((tx_last | rx_last) & BIT(30))
82 clear = true;
83
84 addr += 8;
85 }
86
87 if (clear) {
88 mt7921_mac_wtbl_update(dev, idx,
89 MT_WTBL_UPDATE_ADM_COUNT_CLEAR);
90 memset(msta->airtime_ac, 0, sizeof(msta->airtime_ac));
91 }
92
93 if (!msta->wcid.sta)
94 continue;
95
96 sta = container_of((void *)msta, struct ieee80211_sta,
97 drv_priv);
98 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
99 u8 q = mt76_connac_lmac_mapping(i);
100 u32 tx_cur = tx_time[q];
101 u32 rx_cur = rx_time[q];
102 u8 tid = ac_to_tid[i];
103
104 if (!tx_cur && !rx_cur)
105 continue;
106
107 ieee80211_sta_register_airtime(sta, tid, tx_cur,
108 rx_cur);
109 }
110
111 /* We don't support reading GI info from txs packets.
112 * For accurate tx status reporting and AQL improvement,
113 * we need to make sure that flags match so polling GI
114 * from per-sta counters directly.
115 */
116 rate = &msta->wcid.rate;
117 addr = mt7921_mac_wtbl_lmac_addr(idx,
118 MT_WTBL_TXRX_CAP_RATE_OFFSET);
119 val = mt76_rr(dev, addr);
120
121 switch (rate->bw) {
122 case RATE_INFO_BW_160:
123 bw = IEEE80211_STA_RX_BW_160;
124 break;
125 case RATE_INFO_BW_80:
126 bw = IEEE80211_STA_RX_BW_80;
127 break;
128 case RATE_INFO_BW_40:
129 bw = IEEE80211_STA_RX_BW_40;
130 break;
131 default:
132 bw = IEEE80211_STA_RX_BW_20;
133 break;
134 }
135
136 if (rate->flags & RATE_INFO_FLAGS_HE_MCS) {
137 u8 offs = MT_WTBL_TXRX_RATE_G2_HE + 2 * bw;
138
139 rate->he_gi = (val & (0x3 << offs)) >> offs;
140 } else if (rate->flags &
141 (RATE_INFO_FLAGS_VHT_MCS | RATE_INFO_FLAGS_MCS)) {
142 if (val & BIT(MT_WTBL_TXRX_RATE_G2 + bw))
143 rate->flags |= RATE_INFO_FLAGS_SHORT_GI;
144 else
145 rate->flags &= ~RATE_INFO_FLAGS_SHORT_GI;
146 }
147
148 /* get signal strength of resp frames (CTS/BA/ACK) */
149 addr = mt7921_mac_wtbl_lmac_addr(idx, 30);
150 val = mt76_rr(dev, addr);
151
152 rssi[0] = to_rssi(GENMASK(7, 0), val);
153 rssi[1] = to_rssi(GENMASK(15, 8), val);
154 rssi[2] = to_rssi(GENMASK(23, 16), val);
155 rssi[3] = to_rssi(GENMASK(31, 14), val);
156
157 msta->ack_signal =
158 mt76_rx_signal(msta->vif->phy->mt76->antenna_mask, rssi);
159
160 ewma_avg_signal_add(&msta->avg_ack_signal, -msta->ack_signal);
161 }
162 }
163
164 static int
mt7921_mac_fill_rx(struct mt792x_dev * dev,struct sk_buff * skb)165 mt7921_mac_fill_rx(struct mt792x_dev *dev, struct sk_buff *skb)
166 {
167 u32 csum_mask = MT_RXD0_NORMAL_IP_SUM | MT_RXD0_NORMAL_UDP_TCP_SUM;
168 struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb;
169 bool hdr_trans, unicast, insert_ccmp_hdr = false;
170 u8 chfreq, qos_ctl = 0, remove_pad, amsdu_info;
171 u16 hdr_gap;
172 __le32 *rxv = NULL, *rxd = (__le32 *)skb->data;
173 struct mt76_phy *mphy = &dev->mt76.phy;
174 struct mt792x_phy *phy = &dev->phy;
175 struct ieee80211_supported_band *sband;
176 u32 csum_status = *(u32 *)skb->cb;
177 u32 rxd0 = le32_to_cpu(rxd[0]);
178 u32 rxd1 = le32_to_cpu(rxd[1]);
179 u32 rxd2 = le32_to_cpu(rxd[2]);
180 u32 rxd3 = le32_to_cpu(rxd[3]);
181 u32 rxd4 = le32_to_cpu(rxd[4]);
182 struct mt792x_sta *msta = NULL;
183 u16 seq_ctrl = 0;
184 __le16 fc = 0;
185 u8 mode = 0;
186 int i, idx;
187
188 memset(status, 0, sizeof(*status));
189
190 if (rxd1 & MT_RXD1_NORMAL_BAND_IDX)
191 return -EINVAL;
192
193 if (!test_bit(MT76_STATE_RUNNING, &mphy->state))
194 return -EINVAL;
195
196 if (rxd2 & MT_RXD2_NORMAL_AMSDU_ERR)
197 return -EINVAL;
198
199 hdr_trans = rxd2 & MT_RXD2_NORMAL_HDR_TRANS;
200 if (hdr_trans && (rxd1 & MT_RXD1_NORMAL_CM))
201 return -EINVAL;
202
203 /* ICV error or CCMP/BIP/WPI MIC error */
204 if (rxd1 & MT_RXD1_NORMAL_ICV_ERR)
205 status->flag |= RX_FLAG_ONLY_MONITOR;
206
207 chfreq = FIELD_GET(MT_RXD3_NORMAL_CH_FREQ, rxd3);
208 unicast = FIELD_GET(MT_RXD3_NORMAL_ADDR_TYPE, rxd3) == MT_RXD3_NORMAL_U2M;
209 idx = FIELD_GET(MT_RXD1_NORMAL_WLAN_IDX, rxd1);
210 status->wcid = mt792x_rx_get_wcid(dev, idx, unicast);
211
212 if (status->wcid) {
213 msta = container_of(status->wcid, struct mt792x_sta, wcid);
214 spin_lock_bh(&dev->mt76.sta_poll_lock);
215 if (list_empty(&msta->wcid.poll_list))
216 list_add_tail(&msta->wcid.poll_list,
217 &dev->mt76.sta_poll_list);
218 spin_unlock_bh(&dev->mt76.sta_poll_lock);
219 }
220
221 mt792x_get_status_freq_info(status, chfreq);
222
223 switch (status->band) {
224 case NL80211_BAND_5GHZ:
225 sband = &mphy->sband_5g.sband;
226 break;
227 case NL80211_BAND_6GHZ:
228 sband = &mphy->sband_6g.sband;
229 break;
230 default:
231 sband = &mphy->sband_2g.sband;
232 break;
233 }
234
235 if (!sband->channels)
236 return -EINVAL;
237
238 if (mt76_is_mmio(&dev->mt76) && (rxd0 & csum_mask) == csum_mask &&
239 !(csum_status & (BIT(0) | BIT(2) | BIT(3))))
240 skb->ip_summed = CHECKSUM_UNNECESSARY;
241
242 if (rxd1 & MT_RXD1_NORMAL_FCS_ERR)
243 status->flag |= RX_FLAG_FAILED_FCS_CRC;
244
245 if (rxd1 & MT_RXD1_NORMAL_TKIP_MIC_ERR)
246 status->flag |= RX_FLAG_MMIC_ERROR;
247
248 if (FIELD_GET(MT_RXD1_NORMAL_SEC_MODE, rxd1) != 0 &&
249 !(rxd1 & (MT_RXD1_NORMAL_CLM | MT_RXD1_NORMAL_CM))) {
250 status->flag |= RX_FLAG_DECRYPTED;
251 status->flag |= RX_FLAG_IV_STRIPPED;
252 status->flag |= RX_FLAG_MMIC_STRIPPED | RX_FLAG_MIC_STRIPPED;
253 }
254
255 remove_pad = FIELD_GET(MT_RXD2_NORMAL_HDR_OFFSET, rxd2);
256
257 if (rxd2 & MT_RXD2_NORMAL_MAX_LEN_ERROR)
258 return -EINVAL;
259
260 rxd += 6;
261 if (rxd1 & MT_RXD1_NORMAL_GROUP_4) {
262 u32 v0 = le32_to_cpu(rxd[0]);
263 u32 v2 = le32_to_cpu(rxd[2]);
264
265 fc = cpu_to_le16(FIELD_GET(MT_RXD6_FRAME_CONTROL, v0));
266 seq_ctrl = FIELD_GET(MT_RXD8_SEQ_CTRL, v2);
267 qos_ctl = FIELD_GET(MT_RXD8_QOS_CTL, v2);
268
269 rxd += 4;
270 if ((u8 *)rxd - skb->data >= skb->len)
271 return -EINVAL;
272 }
273
274 if (rxd1 & MT_RXD1_NORMAL_GROUP_1) {
275 u8 *data = (u8 *)rxd;
276
277 if (status->flag & RX_FLAG_DECRYPTED) {
278 switch (FIELD_GET(MT_RXD1_NORMAL_SEC_MODE, rxd1)) {
279 case MT_CIPHER_AES_CCMP:
280 case MT_CIPHER_CCMP_CCX:
281 case MT_CIPHER_CCMP_256:
282 insert_ccmp_hdr =
283 FIELD_GET(MT_RXD2_NORMAL_FRAG, rxd2);
284 fallthrough;
285 case MT_CIPHER_TKIP:
286 case MT_CIPHER_TKIP_NO_MIC:
287 case MT_CIPHER_GCMP:
288 case MT_CIPHER_GCMP_256:
289 status->iv[0] = data[5];
290 status->iv[1] = data[4];
291 status->iv[2] = data[3];
292 status->iv[3] = data[2];
293 status->iv[4] = data[1];
294 status->iv[5] = data[0];
295 break;
296 default:
297 break;
298 }
299 }
300 rxd += 4;
301 if ((u8 *)rxd - skb->data >= skb->len)
302 return -EINVAL;
303 }
304
305 if (rxd1 & MT_RXD1_NORMAL_GROUP_2) {
306 status->timestamp = le32_to_cpu(rxd[0]);
307 status->flag |= RX_FLAG_MACTIME_START;
308
309 if (!(rxd2 & MT_RXD2_NORMAL_NON_AMPDU)) {
310 status->flag |= RX_FLAG_AMPDU_DETAILS;
311
312 /* all subframes of an A-MPDU have the same timestamp */
313 if (phy->rx_ampdu_ts != status->timestamp) {
314 if (!++phy->ampdu_ref)
315 phy->ampdu_ref++;
316 }
317 phy->rx_ampdu_ts = status->timestamp;
318
319 status->ampdu_ref = phy->ampdu_ref;
320 }
321
322 rxd += 2;
323 if ((u8 *)rxd - skb->data >= skb->len)
324 return -EINVAL;
325 }
326
327 /* RXD Group 3 - P-RXV */
328 if (rxd1 & MT_RXD1_NORMAL_GROUP_3) {
329 u32 v0, v1;
330 int ret;
331
332 rxv = rxd;
333 rxd += 2;
334 if ((u8 *)rxd - skb->data >= skb->len)
335 return -EINVAL;
336
337 v0 = le32_to_cpu(rxv[0]);
338 v1 = le32_to_cpu(rxv[1]);
339
340 if (v0 & MT_PRXV_HT_AD_CODE)
341 status->enc_flags |= RX_ENC_FLAG_LDPC;
342
343 ret = mt76_connac2_mac_fill_rx_rate(&dev->mt76, status, sband,
344 rxv, &mode);
345 if (ret < 0)
346 return ret;
347
348 if (rxd1 & MT_RXD1_NORMAL_GROUP_5) {
349 rxd += 6;
350 if ((u8 *)rxd - skb->data >= skb->len)
351 return -EINVAL;
352
353 rxv = rxd;
354 /* Monitor mode would use RCPI described in GROUP 5
355 * instead.
356 */
357 v1 = le32_to_cpu(rxv[0]);
358
359 rxd += 12;
360 if ((u8 *)rxd - skb->data >= skb->len)
361 return -EINVAL;
362 }
363
364 status->chains = mphy->antenna_mask;
365 status->chain_signal[0] = to_rssi(MT_PRXV_RCPI0, v1);
366 status->chain_signal[1] = to_rssi(MT_PRXV_RCPI1, v1);
367 status->chain_signal[2] = to_rssi(MT_PRXV_RCPI2, v1);
368 status->chain_signal[3] = to_rssi(MT_PRXV_RCPI3, v1);
369 status->signal = -128;
370 for (i = 0; i < hweight8(mphy->antenna_mask); i++) {
371 if (!(status->chains & BIT(i)) ||
372 status->chain_signal[i] >= 0)
373 continue;
374
375 status->signal = max(status->signal,
376 status->chain_signal[i]);
377 }
378 }
379
380 amsdu_info = FIELD_GET(MT_RXD4_NORMAL_PAYLOAD_FORMAT, rxd4);
381 status->amsdu = !!amsdu_info;
382 if (status->amsdu) {
383 status->first_amsdu = amsdu_info == MT_RXD4_FIRST_AMSDU_FRAME;
384 status->last_amsdu = amsdu_info == MT_RXD4_LAST_AMSDU_FRAME;
385 }
386
387 hdr_gap = (u8 *)rxd - skb->data + 2 * remove_pad;
388 if (hdr_trans && ieee80211_has_morefrags(fc)) {
389 struct ieee80211_vif *vif;
390 int err;
391
392 if (!msta || !msta->vif)
393 return -EINVAL;
394
395 vif = container_of((void *)msta->vif, struct ieee80211_vif,
396 drv_priv);
397 err = mt76_connac2_reverse_frag0_hdr_trans(vif, skb, hdr_gap);
398 if (err)
399 return err;
400
401 hdr_trans = false;
402 } else {
403 skb_pull(skb, hdr_gap);
404 if (!hdr_trans && status->amsdu) {
405 memmove(skb->data + 2, skb->data,
406 ieee80211_get_hdrlen_from_skb(skb));
407 skb_pull(skb, 2);
408 }
409 }
410
411 if (!hdr_trans) {
412 struct ieee80211_hdr *hdr;
413
414 if (insert_ccmp_hdr) {
415 u8 key_id = FIELD_GET(MT_RXD1_NORMAL_KEY_ID, rxd1);
416
417 mt76_insert_ccmp_hdr(skb, key_id);
418 }
419
420 hdr = mt76_skb_get_hdr(skb);
421 fc = hdr->frame_control;
422 if (ieee80211_is_data_qos(fc)) {
423 seq_ctrl = le16_to_cpu(hdr->seq_ctrl);
424 qos_ctl = *ieee80211_get_qos_ctl(hdr);
425 }
426 } else {
427 status->flag |= RX_FLAG_8023;
428 }
429
430 mt792x_mac_assoc_rssi(dev, skb);
431
432 if (rxv && mode >= MT_PHY_TYPE_HE_SU && !(status->flag & RX_FLAG_8023))
433 mt76_connac2_mac_decode_he_radiotap(&dev->mt76, skb, rxv, mode);
434
435 if (!status->wcid || !ieee80211_is_data_qos(fc))
436 return 0;
437
438 status->aggr = unicast && !ieee80211_is_qos_nullfunc(fc);
439 status->seqno = IEEE80211_SEQ_TO_SN(seq_ctrl);
440 status->qos_ctl = qos_ctl;
441
442 return 0;
443 }
444
mt7921_mac_add_txs(struct mt792x_dev * dev,void * data)445 void mt7921_mac_add_txs(struct mt792x_dev *dev, void *data)
446 {
447 struct mt792x_sta *msta = NULL;
448 struct mt76_wcid *wcid;
449 __le32 *txs_data = data;
450 u16 wcidx;
451 u8 pid;
452
453 if (le32_get_bits(txs_data[0], MT_TXS0_TXS_FORMAT) > 1)
454 return;
455
456 wcidx = le32_get_bits(txs_data[2], MT_TXS2_WCID);
457 pid = le32_get_bits(txs_data[3], MT_TXS3_PID);
458
459 if (pid < MT_PACKET_ID_FIRST)
460 return;
461
462 if (wcidx >= MT792x_WTBL_SIZE)
463 return;
464
465 rcu_read_lock();
466
467 wcid = rcu_dereference(dev->mt76.wcid[wcidx]);
468 if (!wcid)
469 goto out;
470
471 msta = container_of(wcid, struct mt792x_sta, wcid);
472
473 mt76_connac2_mac_add_txs_skb(&dev->mt76, wcid, pid, txs_data);
474 if (!wcid->sta)
475 goto out;
476
477 spin_lock_bh(&dev->mt76.sta_poll_lock);
478 if (list_empty(&msta->wcid.poll_list))
479 list_add_tail(&msta->wcid.poll_list, &dev->mt76.sta_poll_list);
480 spin_unlock_bh(&dev->mt76.sta_poll_lock);
481
482 out:
483 rcu_read_unlock();
484 }
485
mt7921_mac_tx_free(struct mt792x_dev * dev,void * data,int len)486 static void mt7921_mac_tx_free(struct mt792x_dev *dev, void *data, int len)
487 {
488 struct mt76_connac_tx_free *free = data;
489 __le32 *tx_info = (__le32 *)(data + sizeof(*free));
490 struct mt76_dev *mdev = &dev->mt76;
491 struct mt76_txwi_cache *txwi;
492 struct ieee80211_sta *sta = NULL;
493 struct mt76_wcid *wcid = NULL;
494 struct sk_buff *skb, *tmp;
495 void *end = data + len;
496 LIST_HEAD(free_list);
497 bool wake = false;
498 u8 i, count;
499
500 /* clean DMA queues and unmap buffers first */
501 mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[MT_TXQ_PSD], false);
502 mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[MT_TXQ_BE], false);
503
504 count = le16_get_bits(free->ctrl, MT_TX_FREE_MSDU_CNT);
505 if (WARN_ON_ONCE((void *)&tx_info[count] > end))
506 return;
507
508 for (i = 0; i < count; i++) {
509 u32 msdu, info = le32_to_cpu(tx_info[i]);
510 u8 stat;
511
512 /* 1'b1: new wcid pair.
513 * 1'b0: msdu_id with the same 'wcid pair' as above.
514 */
515 if (info & MT_TX_FREE_PAIR) {
516 struct mt792x_sta *msta;
517 u16 idx;
518
519 count++;
520 idx = FIELD_GET(MT_TX_FREE_WLAN_ID, info);
521 wcid = rcu_dereference(dev->mt76.wcid[idx]);
522 sta = wcid_to_sta(wcid);
523 if (!sta)
524 continue;
525
526 msta = container_of(wcid, struct mt792x_sta, wcid);
527 spin_lock_bh(&mdev->sta_poll_lock);
528 if (list_empty(&msta->wcid.poll_list))
529 list_add_tail(&msta->wcid.poll_list,
530 &mdev->sta_poll_list);
531 spin_unlock_bh(&mdev->sta_poll_lock);
532 continue;
533 }
534
535 msdu = FIELD_GET(MT_TX_FREE_MSDU_ID, info);
536 stat = FIELD_GET(MT_TX_FREE_STATUS, info);
537
538 if (wcid) {
539 wcid->stats.tx_retries +=
540 FIELD_GET(MT_TX_FREE_COUNT, info) - 1;
541 wcid->stats.tx_failed += !!stat;
542 }
543
544 txwi = mt76_token_release(mdev, msdu, &wake);
545 if (!txwi)
546 continue;
547
548 mt76_connac2_txwi_free(mdev, txwi, sta, &free_list);
549 }
550
551 if (wake)
552 mt76_set_tx_blocked(&dev->mt76, false);
553
554 list_for_each_entry_safe(skb, tmp, &free_list, list) {
555 skb_list_del_init(skb);
556 napi_consume_skb(skb, 1);
557 }
558
559 rcu_read_lock();
560 mt7921_mac_sta_poll(dev);
561 rcu_read_unlock();
562
563 mt76_worker_schedule(&dev->mt76.tx_worker);
564 }
565
mt7921_rx_check(struct mt76_dev * mdev,void * data,int len)566 bool mt7921_rx_check(struct mt76_dev *mdev, void *data, int len)
567 {
568 struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
569 __le32 *rxd = (__le32 *)data;
570 __le32 *end = (__le32 *)&rxd[len / 4];
571 enum rx_pkt_type type;
572
573 type = le32_get_bits(rxd[0], MT_RXD0_PKT_TYPE);
574
575 switch (type) {
576 case PKT_TYPE_TXRX_NOTIFY:
577 /* PKT_TYPE_TXRX_NOTIFY can be received only by mmio devices */
578 mt7921_mac_tx_free(dev, data, len); /* mmio */
579 return false;
580 case PKT_TYPE_TXS:
581 for (rxd += 2; rxd + 8 <= end; rxd += 8)
582 mt7921_mac_add_txs(dev, rxd);
583 return false;
584 default:
585 return true;
586 }
587 }
588 EXPORT_SYMBOL_GPL(mt7921_rx_check);
589
mt7921_queue_rx_skb(struct mt76_dev * mdev,enum mt76_rxq_id q,struct sk_buff * skb,u32 * info)590 void mt7921_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q,
591 struct sk_buff *skb, u32 *info)
592 {
593 struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
594 __le32 *rxd = (__le32 *)skb->data;
595 __le32 *end = (__le32 *)&skb->data[skb->len];
596 enum rx_pkt_type type;
597 u16 flag;
598
599 type = le32_get_bits(rxd[0], MT_RXD0_PKT_TYPE);
600 flag = le32_get_bits(rxd[0], MT_RXD0_PKT_FLAG);
601
602 if (type == PKT_TYPE_RX_EVENT && flag == 0x1)
603 type = PKT_TYPE_NORMAL_MCU;
604
605 switch (type) {
606 case PKT_TYPE_TXRX_NOTIFY:
607 /* PKT_TYPE_TXRX_NOTIFY can be received only by mmio devices */
608 mt7921_mac_tx_free(dev, skb->data, skb->len);
609 napi_consume_skb(skb, 1);
610 break;
611 case PKT_TYPE_RX_EVENT:
612 mt7921_mcu_rx_event(dev, skb);
613 break;
614 case PKT_TYPE_TXS:
615 for (rxd += 2; rxd + 8 <= end; rxd += 8)
616 mt7921_mac_add_txs(dev, rxd);
617 dev_kfree_skb(skb);
618 break;
619 case PKT_TYPE_NORMAL_MCU:
620 case PKT_TYPE_NORMAL:
621 if (!mt7921_mac_fill_rx(dev, skb)) {
622 mt76_rx(&dev->mt76, q, skb);
623 return;
624 }
625 fallthrough;
626 default:
627 dev_kfree_skb(skb);
628 break;
629 }
630 }
631 EXPORT_SYMBOL_GPL(mt7921_queue_rx_skb);
632
633 static void
mt7921_vif_connect_iter(void * priv,u8 * mac,struct ieee80211_vif * vif)634 mt7921_vif_connect_iter(void *priv, u8 *mac,
635 struct ieee80211_vif *vif)
636 {
637 struct mt792x_vif *mvif = (struct mt792x_vif *)vif->drv_priv;
638 struct mt792x_dev *dev = mvif->phy->dev;
639 struct ieee80211_hw *hw = mt76_hw(dev);
640
641 if (vif->type == NL80211_IFTYPE_STATION)
642 ieee80211_disconnect(vif, true);
643
644 mt76_connac_mcu_uni_add_dev(&dev->mphy, vif, &mvif->sta.wcid, true);
645 mt7921_mcu_set_tx(dev, vif);
646
647 if (vif->type == NL80211_IFTYPE_AP) {
648 mt76_connac_mcu_uni_add_bss(dev->phy.mt76, vif, &mvif->sta.wcid,
649 true, NULL);
650 mt7921_mcu_sta_update(dev, NULL, vif, true,
651 MT76_STA_INFO_STATE_NONE);
652 mt7921_mcu_uni_add_beacon_offload(dev, hw, vif, true);
653 }
654 }
655
656 /* system error recovery */
mt7921_mac_reset_work(struct work_struct * work)657 void mt7921_mac_reset_work(struct work_struct *work)
658 {
659 struct mt792x_dev *dev = container_of(work, struct mt792x_dev,
660 reset_work);
661 struct ieee80211_hw *hw = mt76_hw(dev);
662 struct mt76_connac_pm *pm = &dev->pm;
663 int i, ret;
664
665 dev_dbg(dev->mt76.dev, "chip reset\n");
666 dev->hw_full_reset = true;
667 ieee80211_stop_queues(hw);
668
669 cancel_delayed_work_sync(&dev->mphy.mac_work);
670 cancel_delayed_work_sync(&pm->ps_work);
671 cancel_work_sync(&pm->wake_work);
672
673 for (i = 0; i < 10; i++) {
674 mutex_lock(&dev->mt76.mutex);
675 ret = mt792x_dev_reset(dev);
676 mutex_unlock(&dev->mt76.mutex);
677
678 if (!ret)
679 break;
680 }
681
682 if (i == 10)
683 dev_err(dev->mt76.dev, "chip reset failed\n");
684
685 if (test_and_clear_bit(MT76_HW_SCANNING, &dev->mphy.state)) {
686 struct cfg80211_scan_info info = {
687 .aborted = true,
688 };
689
690 ieee80211_scan_completed(dev->mphy.hw, &info);
691 }
692
693 dev->hw_full_reset = false;
694 pm->suspended = false;
695 ieee80211_wake_queues(hw);
696 ieee80211_iterate_active_interfaces(hw,
697 IEEE80211_IFACE_ITER_RESUME_ALL,
698 mt7921_vif_connect_iter, NULL);
699 mt76_connac_power_save_sched(&dev->mt76.phy, pm);
700 }
701
mt7921_coredump_work(struct work_struct * work)702 void mt7921_coredump_work(struct work_struct *work)
703 {
704 struct mt792x_dev *dev;
705 char *dump, *data;
706
707 dev = (struct mt792x_dev *)container_of(work, struct mt792x_dev,
708 coredump.work.work);
709
710 if (time_is_after_jiffies(dev->coredump.last_activity +
711 4 * MT76_CONNAC_COREDUMP_TIMEOUT)) {
712 queue_delayed_work(dev->mt76.wq, &dev->coredump.work,
713 MT76_CONNAC_COREDUMP_TIMEOUT);
714 return;
715 }
716
717 dump = vzalloc(MT76_CONNAC_COREDUMP_SZ);
718 data = dump;
719
720 while (true) {
721 struct sk_buff *skb;
722
723 spin_lock_bh(&dev->mt76.lock);
724 skb = __skb_dequeue(&dev->coredump.msg_list);
725 spin_unlock_bh(&dev->mt76.lock);
726
727 if (!skb)
728 break;
729
730 skb_pull(skb, sizeof(struct mt76_connac2_mcu_rxd));
731 if (!dump || data + skb->len - dump > MT76_CONNAC_COREDUMP_SZ) {
732 dev_kfree_skb(skb);
733 continue;
734 }
735
736 memcpy(data, skb->data, skb->len);
737 data += skb->len;
738
739 dev_kfree_skb(skb);
740 }
741
742 if (dump)
743 dev_coredumpv(dev->mt76.dev, dump, MT76_CONNAC_COREDUMP_SZ,
744 GFP_KERNEL);
745
746 mt792x_reset(&dev->mt76);
747 }
748
749 /* usb_sdio */
750 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)751 mt7921_usb_sdio_write_txwi(struct mt792x_dev *dev, struct mt76_wcid *wcid,
752 enum mt76_txq_id qid, struct ieee80211_sta *sta,
753 struct ieee80211_key_conf *key, int pid,
754 struct sk_buff *skb)
755 {
756 __le32 *txwi = (__le32 *)(skb->data - MT_SDIO_TXD_SIZE);
757
758 memset(txwi, 0, MT_SDIO_TXD_SIZE);
759 mt76_connac2_mac_write_txwi(&dev->mt76, txwi, skb, wcid, key, pid, qid, 0);
760 skb_push(skb, MT_SDIO_TXD_SIZE);
761 }
762
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)763 int mt7921_usb_sdio_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr,
764 enum mt76_txq_id qid, struct mt76_wcid *wcid,
765 struct ieee80211_sta *sta,
766 struct mt76_tx_info *tx_info)
767 {
768 struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
769 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_info->skb);
770 struct ieee80211_key_conf *key = info->control.hw_key;
771 struct sk_buff *skb = tx_info->skb;
772 int err, pad, pktid, type;
773
774 if (unlikely(tx_info->skb->len <= ETH_HLEN))
775 return -EINVAL;
776
777 err = skb_cow_head(skb, MT_SDIO_TXD_SIZE + MT_SDIO_HDR_SIZE);
778 if (err)
779 return err;
780
781 if (!wcid)
782 wcid = &dev->mt76.global_wcid;
783
784 if (sta) {
785 struct mt792x_sta *msta = (struct mt792x_sta *)sta->drv_priv;
786
787 if (time_after(jiffies, msta->last_txs + HZ / 4)) {
788 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
789 msta->last_txs = jiffies;
790 }
791 }
792
793 pktid = mt76_tx_status_skb_add(&dev->mt76, wcid, skb);
794 mt7921_usb_sdio_write_txwi(dev, wcid, qid, sta, key, pktid, skb);
795
796 type = mt76_is_sdio(mdev) ? MT7921_SDIO_DATA : 0;
797 mt7921_skb_add_usb_sdio_hdr(dev, skb, type);
798 pad = round_up(skb->len, 4) - skb->len;
799 if (mt76_is_usb(mdev))
800 pad += 4;
801
802 err = mt76_skb_adjust_pad(skb, pad);
803 if (err)
804 /* Release pktid in case of error. */
805 idr_remove(&wcid->pktid, pktid);
806
807 return err;
808 }
809 EXPORT_SYMBOL_GPL(mt7921_usb_sdio_tx_prepare_skb);
810
mt7921_usb_sdio_tx_complete_skb(struct mt76_dev * mdev,struct mt76_queue_entry * e)811 void mt7921_usb_sdio_tx_complete_skb(struct mt76_dev *mdev,
812 struct mt76_queue_entry *e)
813 {
814 __le32 *txwi = (__le32 *)(e->skb->data + MT_SDIO_HDR_SIZE);
815 unsigned int headroom = MT_SDIO_TXD_SIZE + MT_SDIO_HDR_SIZE;
816 struct ieee80211_sta *sta;
817 struct mt76_wcid *wcid;
818 u16 idx;
819
820 idx = le32_get_bits(txwi[1], MT_TXD1_WLAN_IDX);
821 wcid = rcu_dereference(mdev->wcid[idx]);
822 sta = wcid_to_sta(wcid);
823
824 if (sta && likely(e->skb->protocol != cpu_to_be16(ETH_P_PAE)))
825 mt76_connac2_tx_check_aggr(sta, txwi);
826
827 skb_pull(e->skb, headroom);
828 mt76_tx_complete_skb(mdev, e->wcid, e->skb);
829 }
830 EXPORT_SYMBOL_GPL(mt7921_usb_sdio_tx_complete_skb);
831
mt7921_usb_sdio_tx_status_data(struct mt76_dev * mdev,u8 * update)832 bool mt7921_usb_sdio_tx_status_data(struct mt76_dev *mdev, u8 *update)
833 {
834 struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
835
836 mt792x_mutex_acquire(dev);
837 mt7921_mac_sta_poll(dev);
838 mt792x_mutex_release(dev);
839
840 return false;
841 }
842 EXPORT_SYMBOL_GPL(mt7921_usb_sdio_tx_status_data);
843
844 #if IS_ENABLED(CONFIG_IPV6)
mt7921_set_ipv6_ns_work(struct work_struct * work)845 void mt7921_set_ipv6_ns_work(struct work_struct *work)
846 {
847 struct mt792x_dev *dev = container_of(work, struct mt792x_dev,
848 ipv6_ns_work);
849 struct sk_buff *skb;
850 int ret = 0;
851
852 do {
853 skb = skb_dequeue(&dev->ipv6_ns_list);
854
855 if (!skb)
856 break;
857
858 mt792x_mutex_acquire(dev);
859 ret = mt76_mcu_skb_send_msg(&dev->mt76, skb,
860 MCU_UNI_CMD(OFFLOAD), true);
861 mt792x_mutex_release(dev);
862
863 } while (!ret);
864
865 if (ret)
866 skb_queue_purge(&dev->ipv6_ns_list);
867 }
868 #endif
869
