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 u32 tx_time[IEEE80211_NUM_ACS], rx_time[IEEE80211_NUM_ACS];
46 #if defined(__linux__)
47 LIST_HEAD(sta_poll_list);
48 #elif defined(__FreeBSD__)
49 LINUX_LIST_HEAD(sta_poll_list);
50 #endif
51 struct rate_info *rate;
52 s8 rssi[4];
53 int i;
54
55 spin_lock_bh(&dev->mt76.sta_poll_lock);
56 list_splice_init(&dev->mt76.sta_poll_list, &sta_poll_list);
57 spin_unlock_bh(&dev->mt76.sta_poll_lock);
58
59 while (true) {
60 bool clear = false;
61 u32 addr, val;
62 u16 idx;
63 u8 bw;
64
65 spin_lock_bh(&dev->mt76.sta_poll_lock);
66 if (list_empty(&sta_poll_list)) {
67 spin_unlock_bh(&dev->mt76.sta_poll_lock);
68 break;
69 }
70 msta = list_first_entry(&sta_poll_list,
71 struct mt792x_sta, wcid.poll_list);
72 list_del_init(&msta->wcid.poll_list);
73 spin_unlock_bh(&dev->mt76.sta_poll_lock);
74
75 idx = msta->wcid.idx;
76 addr = mt7921_mac_wtbl_lmac_addr(idx, MT_WTBL_AC0_CTT_OFFSET);
77
78 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
79 u32 tx_last = msta->airtime_ac[i];
80 u32 rx_last = msta->airtime_ac[i + 4];
81
82 msta->airtime_ac[i] = mt76_rr(dev, addr);
83 msta->airtime_ac[i + 4] = mt76_rr(dev, addr + 4);
84
85 tx_time[i] = msta->airtime_ac[i] - tx_last;
86 rx_time[i] = msta->airtime_ac[i + 4] - rx_last;
87
88 if ((tx_last | rx_last) & BIT(30))
89 clear = true;
90
91 addr += 8;
92 }
93
94 if (clear) {
95 mt7921_mac_wtbl_update(dev, idx,
96 MT_WTBL_UPDATE_ADM_COUNT_CLEAR);
97 memset(msta->airtime_ac, 0, sizeof(msta->airtime_ac));
98 }
99
100 if (!msta->wcid.sta)
101 continue;
102
103 sta = container_of((void *)msta, struct ieee80211_sta,
104 drv_priv);
105 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
106 u8 q = mt76_connac_lmac_mapping(i);
107 u32 tx_cur = tx_time[q];
108 u32 rx_cur = rx_time[q];
109 u8 tid = ac_to_tid[i];
110
111 if (!tx_cur && !rx_cur)
112 continue;
113
114 ieee80211_sta_register_airtime(sta, tid, tx_cur,
115 rx_cur);
116 }
117
118 /* We don't support reading GI info from txs packets.
119 * For accurate tx status reporting and AQL improvement,
120 * we need to make sure that flags match so polling GI
121 * from per-sta counters directly.
122 */
123 rate = &msta->wcid.rate;
124 addr = mt7921_mac_wtbl_lmac_addr(idx,
125 MT_WTBL_TXRX_CAP_RATE_OFFSET);
126 val = mt76_rr(dev, addr);
127
128 switch (rate->bw) {
129 case RATE_INFO_BW_160:
130 bw = IEEE80211_STA_RX_BW_160;
131 break;
132 case RATE_INFO_BW_80:
133 bw = IEEE80211_STA_RX_BW_80;
134 break;
135 case RATE_INFO_BW_40:
136 bw = IEEE80211_STA_RX_BW_40;
137 break;
138 default:
139 bw = IEEE80211_STA_RX_BW_20;
140 break;
141 }
142
143 if (rate->flags & RATE_INFO_FLAGS_HE_MCS) {
144 u8 offs = MT_WTBL_TXRX_RATE_G2_HE + 2 * bw;
145
146 rate->he_gi = (val & (0x3 << offs)) >> offs;
147 } else if (rate->flags &
148 (RATE_INFO_FLAGS_VHT_MCS | RATE_INFO_FLAGS_MCS)) {
149 if (val & BIT(MT_WTBL_TXRX_RATE_G2 + bw))
150 rate->flags |= RATE_INFO_FLAGS_SHORT_GI;
151 else
152 rate->flags &= ~RATE_INFO_FLAGS_SHORT_GI;
153 }
154
155 /* get signal strength of resp frames (CTS/BA/ACK) */
156 addr = mt7921_mac_wtbl_lmac_addr(idx, 30);
157 val = mt76_rr(dev, addr);
158
159 rssi[0] = to_rssi(GENMASK(7, 0), val);
160 rssi[1] = to_rssi(GENMASK(15, 8), val);
161 rssi[2] = to_rssi(GENMASK(23, 16), val);
162 rssi[3] = to_rssi(GENMASK(31, 14), val);
163
164 msta->ack_signal =
165 mt76_rx_signal(msta->vif->phy->mt76->antenna_mask, rssi);
166
167 ewma_avg_signal_add(&msta->avg_ack_signal, -msta->ack_signal);
168 }
169 }
170
171 static int
mt7921_mac_fill_rx(struct mt792x_dev * dev,struct sk_buff * skb)172 mt7921_mac_fill_rx(struct mt792x_dev *dev, struct sk_buff *skb)
173 {
174 u32 csum_mask = MT_RXD0_NORMAL_IP_SUM | MT_RXD0_NORMAL_UDP_TCP_SUM;
175 struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb;
176 bool hdr_trans, unicast, insert_ccmp_hdr = false;
177 u8 chfreq, qos_ctl = 0, remove_pad, amsdu_info;
178 u16 hdr_gap;
179 __le32 *rxv = NULL, *rxd = (__le32 *)skb->data;
180 struct mt76_phy *mphy = &dev->mt76.phy;
181 struct mt792x_phy *phy = &dev->phy;
182 struct ieee80211_supported_band *sband;
183 u32 csum_status = *(u32 *)skb->cb;
184 u32 rxd0 = le32_to_cpu(rxd[0]);
185 u32 rxd1 = le32_to_cpu(rxd[1]);
186 u32 rxd2 = le32_to_cpu(rxd[2]);
187 u32 rxd3 = le32_to_cpu(rxd[3]);
188 u32 rxd4 = le32_to_cpu(rxd[4]);
189 struct mt792x_sta *msta = NULL;
190 u16 seq_ctrl = 0;
191 __le16 fc = 0;
192 u8 mode = 0;
193 int i, idx;
194
195 memset(status, 0, sizeof(*status));
196
197 if (rxd1 & MT_RXD1_NORMAL_BAND_IDX)
198 return -EINVAL;
199
200 if (!test_bit(MT76_STATE_RUNNING, &mphy->state))
201 return -EINVAL;
202
203 if (rxd2 & MT_RXD2_NORMAL_AMSDU_ERR)
204 return -EINVAL;
205
206 hdr_trans = rxd2 & MT_RXD2_NORMAL_HDR_TRANS;
207 if (hdr_trans && (rxd1 & MT_RXD1_NORMAL_CM))
208 return -EINVAL;
209
210 /* ICV error or CCMP/BIP/WPI MIC error */
211 if (rxd1 & MT_RXD1_NORMAL_ICV_ERR)
212 status->flag |= RX_FLAG_ONLY_MONITOR;
213
214 chfreq = FIELD_GET(MT_RXD3_NORMAL_CH_FREQ, rxd3);
215 unicast = FIELD_GET(MT_RXD3_NORMAL_ADDR_TYPE, rxd3) == MT_RXD3_NORMAL_U2M;
216 idx = FIELD_GET(MT_RXD1_NORMAL_WLAN_IDX, rxd1);
217 status->wcid = mt792x_rx_get_wcid(dev, idx, unicast);
218
219 if (status->wcid) {
220 msta = container_of(status->wcid, struct mt792x_sta, wcid);
221 spin_lock_bh(&dev->mt76.sta_poll_lock);
222 if (list_empty(&msta->wcid.poll_list))
223 list_add_tail(&msta->wcid.poll_list,
224 &dev->mt76.sta_poll_list);
225 spin_unlock_bh(&dev->mt76.sta_poll_lock);
226 }
227
228 mt792x_get_status_freq_info(status, chfreq);
229
230 switch (status->band) {
231 case NL80211_BAND_5GHZ:
232 sband = &mphy->sband_5g.sband;
233 break;
234 case NL80211_BAND_6GHZ:
235 sband = &mphy->sband_6g.sband;
236 break;
237 default:
238 sband = &mphy->sband_2g.sband;
239 break;
240 }
241
242 if (!sband->channels)
243 return -EINVAL;
244
245 if (mt76_is_mmio(&dev->mt76) && (rxd0 & csum_mask) == csum_mask &&
246 !(csum_status & (BIT(0) | BIT(2) | BIT(3))))
247 skb->ip_summed = CHECKSUM_UNNECESSARY;
248
249 if (rxd1 & MT_RXD1_NORMAL_FCS_ERR)
250 status->flag |= RX_FLAG_FAILED_FCS_CRC;
251
252 if (rxd1 & MT_RXD1_NORMAL_TKIP_MIC_ERR)
253 status->flag |= RX_FLAG_MMIC_ERROR;
254
255 if (FIELD_GET(MT_RXD1_NORMAL_SEC_MODE, rxd1) != 0 &&
256 !(rxd1 & (MT_RXD1_NORMAL_CLM | MT_RXD1_NORMAL_CM))) {
257 status->flag |= RX_FLAG_DECRYPTED;
258 status->flag |= RX_FLAG_IV_STRIPPED;
259 status->flag |= RX_FLAG_MMIC_STRIPPED | RX_FLAG_MIC_STRIPPED;
260 }
261
262 remove_pad = FIELD_GET(MT_RXD2_NORMAL_HDR_OFFSET, rxd2);
263
264 if (rxd2 & MT_RXD2_NORMAL_MAX_LEN_ERROR)
265 return -EINVAL;
266
267 rxd += 6;
268 if (rxd1 & MT_RXD1_NORMAL_GROUP_4) {
269 u32 v0 = le32_to_cpu(rxd[0]);
270 u32 v2 = le32_to_cpu(rxd[2]);
271
272 fc = cpu_to_le16(FIELD_GET(MT_RXD6_FRAME_CONTROL, v0));
273 seq_ctrl = FIELD_GET(MT_RXD8_SEQ_CTRL, v2);
274 qos_ctl = FIELD_GET(MT_RXD8_QOS_CTL, v2);
275
276 rxd += 4;
277 if ((u8 *)rxd - skb->data >= skb->len)
278 return -EINVAL;
279 }
280
281 if (rxd1 & MT_RXD1_NORMAL_GROUP_1) {
282 u8 *data = (u8 *)rxd;
283
284 if (status->flag & RX_FLAG_DECRYPTED) {
285 switch (FIELD_GET(MT_RXD1_NORMAL_SEC_MODE, rxd1)) {
286 case MT_CIPHER_AES_CCMP:
287 case MT_CIPHER_CCMP_CCX:
288 case MT_CIPHER_CCMP_256:
289 insert_ccmp_hdr =
290 FIELD_GET(MT_RXD2_NORMAL_FRAG, rxd2);
291 fallthrough;
292 case MT_CIPHER_TKIP:
293 case MT_CIPHER_TKIP_NO_MIC:
294 case MT_CIPHER_GCMP:
295 case MT_CIPHER_GCMP_256:
296 status->iv[0] = data[5];
297 status->iv[1] = data[4];
298 status->iv[2] = data[3];
299 status->iv[3] = data[2];
300 status->iv[4] = data[1];
301 status->iv[5] = data[0];
302 break;
303 default:
304 break;
305 }
306 }
307 rxd += 4;
308 if ((u8 *)rxd - skb->data >= skb->len)
309 return -EINVAL;
310 }
311
312 if (rxd1 & MT_RXD1_NORMAL_GROUP_2) {
313 status->timestamp = le32_to_cpu(rxd[0]);
314 status->flag |= RX_FLAG_MACTIME_START;
315
316 if (!(rxd2 & MT_RXD2_NORMAL_NON_AMPDU)) {
317 status->flag |= RX_FLAG_AMPDU_DETAILS;
318
319 /* all subframes of an A-MPDU have the same timestamp */
320 if (phy->rx_ampdu_ts != status->timestamp) {
321 if (!++phy->ampdu_ref)
322 phy->ampdu_ref++;
323 }
324 phy->rx_ampdu_ts = status->timestamp;
325
326 status->ampdu_ref = phy->ampdu_ref;
327 }
328
329 rxd += 2;
330 if ((u8 *)rxd - skb->data >= skb->len)
331 return -EINVAL;
332 }
333
334 /* RXD Group 3 - P-RXV */
335 if (rxd1 & MT_RXD1_NORMAL_GROUP_3) {
336 u32 v0, v1;
337 int ret;
338
339 rxv = rxd;
340 rxd += 2;
341 if ((u8 *)rxd - skb->data >= skb->len)
342 return -EINVAL;
343
344 v0 = le32_to_cpu(rxv[0]);
345 v1 = le32_to_cpu(rxv[1]);
346
347 if (v0 & MT_PRXV_HT_AD_CODE)
348 status->enc_flags |= RX_ENC_FLAG_LDPC;
349
350 ret = mt76_connac2_mac_fill_rx_rate(&dev->mt76, status, sband,
351 rxv, &mode);
352 if (ret < 0)
353 return ret;
354
355 if (rxd1 & MT_RXD1_NORMAL_GROUP_5) {
356 rxd += 6;
357 if ((u8 *)rxd - skb->data >= skb->len)
358 return -EINVAL;
359
360 rxv = rxd;
361 /* Monitor mode would use RCPI described in GROUP 5
362 * instead.
363 */
364 v1 = le32_to_cpu(rxv[0]);
365
366 rxd += 12;
367 if ((u8 *)rxd - skb->data >= skb->len)
368 return -EINVAL;
369 }
370
371 status->chains = mphy->antenna_mask;
372 status->chain_signal[0] = to_rssi(MT_PRXV_RCPI0, v1);
373 status->chain_signal[1] = to_rssi(MT_PRXV_RCPI1, v1);
374 status->chain_signal[2] = to_rssi(MT_PRXV_RCPI2, v1);
375 status->chain_signal[3] = to_rssi(MT_PRXV_RCPI3, v1);
376 status->signal = -128;
377 for (i = 0; i < hweight8(mphy->antenna_mask); i++) {
378 if (!(status->chains & BIT(i)) ||
379 status->chain_signal[i] >= 0)
380 continue;
381
382 status->signal = max(status->signal,
383 status->chain_signal[i]);
384 }
385 }
386
387 amsdu_info = FIELD_GET(MT_RXD4_NORMAL_PAYLOAD_FORMAT, rxd4);
388 status->amsdu = !!amsdu_info;
389 if (status->amsdu) {
390 status->first_amsdu = amsdu_info == MT_RXD4_FIRST_AMSDU_FRAME;
391 status->last_amsdu = amsdu_info == MT_RXD4_LAST_AMSDU_FRAME;
392 }
393
394 hdr_gap = (u8 *)rxd - skb->data + 2 * remove_pad;
395 if (hdr_trans && ieee80211_has_morefrags(fc)) {
396 struct ieee80211_vif *vif;
397 int err;
398
399 if (!msta || !msta->vif)
400 return -EINVAL;
401
402 vif = container_of((void *)msta->vif, struct ieee80211_vif,
403 drv_priv);
404 err = mt76_connac2_reverse_frag0_hdr_trans(vif, skb, hdr_gap);
405 if (err)
406 return err;
407
408 hdr_trans = false;
409 } else {
410 skb_pull(skb, hdr_gap);
411 if (!hdr_trans && status->amsdu) {
412 memmove(skb->data + 2, skb->data,
413 ieee80211_get_hdrlen_from_skb(skb));
414 skb_pull(skb, 2);
415 }
416 }
417
418 if (!hdr_trans) {
419 struct ieee80211_hdr *hdr;
420
421 if (insert_ccmp_hdr) {
422 u8 key_id = FIELD_GET(MT_RXD1_NORMAL_KEY_ID, rxd1);
423
424 mt76_insert_ccmp_hdr(skb, key_id);
425 }
426
427 hdr = mt76_skb_get_hdr(skb);
428 fc = hdr->frame_control;
429 if (ieee80211_is_data_qos(fc)) {
430 seq_ctrl = le16_to_cpu(hdr->seq_ctrl);
431 qos_ctl = *ieee80211_get_qos_ctl(hdr);
432 }
433 } else {
434 status->flag |= RX_FLAG_8023;
435 }
436
437 mt792x_mac_assoc_rssi(dev, skb);
438
439 if (rxv && mode >= MT_PHY_TYPE_HE_SU && !(status->flag & RX_FLAG_8023))
440 mt76_connac2_mac_decode_he_radiotap(&dev->mt76, skb, rxv, mode);
441
442 if (!status->wcid || !ieee80211_is_data_qos(fc))
443 return 0;
444
445 status->aggr = unicast && !ieee80211_is_qos_nullfunc(fc);
446 status->seqno = IEEE80211_SEQ_TO_SN(seq_ctrl);
447 status->qos_ctl = qos_ctl;
448
449 return 0;
450 }
451
mt7921_mac_add_txs(struct mt792x_dev * dev,void * data)452 void mt7921_mac_add_txs(struct mt792x_dev *dev, void *data)
453 {
454 struct mt792x_sta *msta = NULL;
455 struct mt76_wcid *wcid;
456 __le32 *txs_data = data;
457 u16 wcidx;
458 u8 pid;
459
460 if (le32_get_bits(txs_data[0], MT_TXS0_TXS_FORMAT) > 1)
461 return;
462
463 wcidx = le32_get_bits(txs_data[2], MT_TXS2_WCID);
464 pid = le32_get_bits(txs_data[3], MT_TXS3_PID);
465
466 if (pid < MT_PACKET_ID_FIRST)
467 return;
468
469 if (wcidx >= MT792x_WTBL_SIZE)
470 return;
471
472 rcu_read_lock();
473
474 wcid = rcu_dereference(dev->mt76.wcid[wcidx]);
475 if (!wcid)
476 goto out;
477
478 msta = container_of(wcid, struct mt792x_sta, wcid);
479
480 mt76_connac2_mac_add_txs_skb(&dev->mt76, wcid, pid, txs_data);
481 if (!wcid->sta)
482 goto out;
483
484 spin_lock_bh(&dev->mt76.sta_poll_lock);
485 if (list_empty(&msta->wcid.poll_list))
486 list_add_tail(&msta->wcid.poll_list, &dev->mt76.sta_poll_list);
487 spin_unlock_bh(&dev->mt76.sta_poll_lock);
488
489 out:
490 rcu_read_unlock();
491 }
492
mt7921_mac_tx_free(struct mt792x_dev * dev,void * data,int len)493 static void mt7921_mac_tx_free(struct mt792x_dev *dev, void *data, int len)
494 {
495 struct mt76_connac_tx_free *free = data;
496 #if defined(__linux__)
497 __le32 *tx_info = (__le32 *)(data + sizeof(*free));
498 #elif defined(__FreeBSD__)
499 __le32 *tx_info = (__le32 *)((u8 *)data + sizeof(*free));
500 #endif
501 struct mt76_dev *mdev = &dev->mt76;
502 struct mt76_txwi_cache *txwi;
503 struct ieee80211_sta *sta = NULL;
504 struct mt76_wcid *wcid = NULL;
505 struct sk_buff *skb, *tmp;
506 #if defined(__linux__)
507 void *end = data + len;
508 #elif defined(__FreeBSD__)
509 void *end = (u8 *)data + len;
510 #endif
511 LIST_HEAD(free_list);
512 bool wake = false;
513 u8 i, count;
514
515 /* clean DMA queues and unmap buffers first */
516 mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[MT_TXQ_PSD], false);
517 mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[MT_TXQ_BE], false);
518
519 count = le16_get_bits(free->ctrl, MT_TX_FREE_MSDU_CNT);
520 if (WARN_ON_ONCE((void *)&tx_info[count] > end))
521 return;
522
523 for (i = 0; i < count; i++) {
524 u32 msdu, info = le32_to_cpu(tx_info[i]);
525 u8 stat;
526
527 /* 1'b1: new wcid pair.
528 * 1'b0: msdu_id with the same 'wcid pair' as above.
529 */
530 if (info & MT_TX_FREE_PAIR) {
531 struct mt792x_sta *msta;
532 u16 idx;
533
534 count++;
535 idx = FIELD_GET(MT_TX_FREE_WLAN_ID, info);
536 wcid = rcu_dereference(dev->mt76.wcid[idx]);
537 sta = wcid_to_sta(wcid);
538 if (!sta)
539 continue;
540
541 msta = container_of(wcid, struct mt792x_sta, wcid);
542 spin_lock_bh(&mdev->sta_poll_lock);
543 if (list_empty(&msta->wcid.poll_list))
544 list_add_tail(&msta->wcid.poll_list,
545 &mdev->sta_poll_list);
546 spin_unlock_bh(&mdev->sta_poll_lock);
547 continue;
548 }
549
550 msdu = FIELD_GET(MT_TX_FREE_MSDU_ID, info);
551 stat = FIELD_GET(MT_TX_FREE_STATUS, info);
552
553 if (wcid) {
554 wcid->stats.tx_retries +=
555 FIELD_GET(MT_TX_FREE_COUNT, info) - 1;
556 wcid->stats.tx_failed += !!stat;
557 }
558
559 txwi = mt76_token_release(mdev, msdu, &wake);
560 if (!txwi)
561 continue;
562
563 mt76_connac2_txwi_free(mdev, txwi, sta, &free_list);
564 }
565
566 if (wake)
567 mt76_set_tx_blocked(&dev->mt76, false);
568
569 list_for_each_entry_safe(skb, tmp, &free_list, list) {
570 skb_list_del_init(skb);
571 napi_consume_skb(skb, 1);
572 }
573
574 rcu_read_lock();
575 mt7921_mac_sta_poll(dev);
576 rcu_read_unlock();
577
578 mt76_worker_schedule(&dev->mt76.tx_worker);
579 }
580
mt7921_rx_check(struct mt76_dev * mdev,void * data,int len)581 bool mt7921_rx_check(struct mt76_dev *mdev, void *data, int len)
582 {
583 struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
584 __le32 *rxd = (__le32 *)data;
585 __le32 *end = (__le32 *)&rxd[len / 4];
586 enum rx_pkt_type type;
587
588 type = le32_get_bits(rxd[0], MT_RXD0_PKT_TYPE);
589
590 switch (type) {
591 case PKT_TYPE_TXRX_NOTIFY:
592 /* PKT_TYPE_TXRX_NOTIFY can be received only by mmio devices */
593 mt7921_mac_tx_free(dev, data, len); /* mmio */
594 return false;
595 case PKT_TYPE_TXS:
596 for (rxd += 2; rxd + 8 <= end; rxd += 8)
597 mt7921_mac_add_txs(dev, rxd);
598 return false;
599 default:
600 return true;
601 }
602 }
603 EXPORT_SYMBOL_GPL(mt7921_rx_check);
604
mt7921_queue_rx_skb(struct mt76_dev * mdev,enum mt76_rxq_id q,struct sk_buff * skb,u32 * info)605 void mt7921_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q,
606 struct sk_buff *skb, u32 *info)
607 {
608 struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
609 __le32 *rxd = (__le32 *)skb->data;
610 __le32 *end = (__le32 *)&skb->data[skb->len];
611 enum rx_pkt_type type;
612 u16 flag;
613
614 type = le32_get_bits(rxd[0], MT_RXD0_PKT_TYPE);
615 flag = le32_get_bits(rxd[0], MT_RXD0_PKT_FLAG);
616
617 if (type == PKT_TYPE_RX_EVENT && flag == 0x1)
618 type = PKT_TYPE_NORMAL_MCU;
619
620 switch (type) {
621 case PKT_TYPE_TXRX_NOTIFY:
622 /* PKT_TYPE_TXRX_NOTIFY can be received only by mmio devices */
623 mt7921_mac_tx_free(dev, skb->data, skb->len);
624 napi_consume_skb(skb, 1);
625 break;
626 case PKT_TYPE_RX_EVENT:
627 mt7921_mcu_rx_event(dev, skb);
628 break;
629 case PKT_TYPE_TXS:
630 for (rxd += 2; rxd + 8 <= end; rxd += 8)
631 mt7921_mac_add_txs(dev, rxd);
632 dev_kfree_skb(skb);
633 break;
634 case PKT_TYPE_NORMAL_MCU:
635 case PKT_TYPE_NORMAL:
636 if (!mt7921_mac_fill_rx(dev, skb)) {
637 mt76_rx(&dev->mt76, q, skb);
638 return;
639 }
640 fallthrough;
641 default:
642 dev_kfree_skb(skb);
643 break;
644 }
645 }
646 EXPORT_SYMBOL_GPL(mt7921_queue_rx_skb);
647
648 static void
mt7921_vif_connect_iter(void * priv,u8 * mac,struct ieee80211_vif * vif)649 mt7921_vif_connect_iter(void *priv, u8 *mac,
650 struct ieee80211_vif *vif)
651 {
652 struct mt792x_vif *mvif = (struct mt792x_vif *)vif->drv_priv;
653 struct mt792x_dev *dev = mvif->phy->dev;
654 struct ieee80211_hw *hw = mt76_hw(dev);
655
656 if (vif->type == NL80211_IFTYPE_STATION)
657 ieee80211_disconnect(vif, true);
658
659 mt76_connac_mcu_uni_add_dev(&dev->mphy, vif, &mvif->sta.wcid, true);
660 mt7921_mcu_set_tx(dev, vif);
661
662 if (vif->type == NL80211_IFTYPE_AP) {
663 mt76_connac_mcu_uni_add_bss(dev->phy.mt76, vif, &mvif->sta.wcid,
664 true, NULL);
665 mt7921_mcu_sta_update(dev, NULL, vif, true,
666 MT76_STA_INFO_STATE_NONE);
667 mt7921_mcu_uni_add_beacon_offload(dev, hw, vif, true);
668 }
669 }
670
671 /* system error recovery */
mt7921_mac_reset_work(struct work_struct * work)672 void mt7921_mac_reset_work(struct work_struct *work)
673 {
674 struct mt792x_dev *dev = container_of(work, struct mt792x_dev,
675 reset_work);
676 struct ieee80211_hw *hw = mt76_hw(dev);
677 struct mt76_connac_pm *pm = &dev->pm;
678 int i, ret;
679
680 dev_dbg(dev->mt76.dev, "chip reset\n");
681 dev->hw_full_reset = true;
682 ieee80211_stop_queues(hw);
683
684 cancel_delayed_work_sync(&dev->mphy.mac_work);
685 cancel_delayed_work_sync(&pm->ps_work);
686 cancel_work_sync(&pm->wake_work);
687
688 for (i = 0; i < 10; i++) {
689 mutex_lock(&dev->mt76.mutex);
690 ret = mt792x_dev_reset(dev);
691 mutex_unlock(&dev->mt76.mutex);
692
693 if (!ret)
694 break;
695 }
696
697 if (i == 10)
698 dev_err(dev->mt76.dev, "chip reset failed\n");
699
700 if (test_and_clear_bit(MT76_HW_SCANNING, &dev->mphy.state)) {
701 struct cfg80211_scan_info info = {
702 .aborted = true,
703 };
704
705 ieee80211_scan_completed(dev->mphy.hw, &info);
706 }
707
708 dev->hw_full_reset = false;
709 pm->suspended = false;
710 ieee80211_wake_queues(hw);
711 ieee80211_iterate_active_interfaces(hw,
712 IEEE80211_IFACE_ITER_RESUME_ALL,
713 mt7921_vif_connect_iter, NULL);
714 mt76_connac_power_save_sched(&dev->mt76.phy, pm);
715 }
716
mt7921_coredump_work(struct work_struct * work)717 void mt7921_coredump_work(struct work_struct *work)
718 {
719 struct mt792x_dev *dev;
720 char *dump, *data;
721
722 dev = (struct mt792x_dev *)container_of(work, struct mt792x_dev,
723 coredump.work.work);
724
725 if (time_is_after_jiffies(dev->coredump.last_activity +
726 4 * MT76_CONNAC_COREDUMP_TIMEOUT)) {
727 queue_delayed_work(dev->mt76.wq, &dev->coredump.work,
728 MT76_CONNAC_COREDUMP_TIMEOUT);
729 return;
730 }
731
732 dump = vzalloc(MT76_CONNAC_COREDUMP_SZ);
733 data = dump;
734
735 while (true) {
736 struct sk_buff *skb;
737
738 spin_lock_bh(&dev->mt76.lock);
739 skb = __skb_dequeue(&dev->coredump.msg_list);
740 spin_unlock_bh(&dev->mt76.lock);
741
742 if (!skb)
743 break;
744
745 skb_pull(skb, sizeof(struct mt76_connac2_mcu_rxd));
746 if (!dump || data + skb->len - dump > MT76_CONNAC_COREDUMP_SZ) {
747 dev_kfree_skb(skb);
748 continue;
749 }
750
751 memcpy(data, skb->data, skb->len);
752 data += skb->len;
753
754 dev_kfree_skb(skb);
755 }
756
757 if (dump)
758 dev_coredumpv(dev->mt76.dev, dump, MT76_CONNAC_COREDUMP_SZ,
759 GFP_KERNEL);
760
761 mt792x_reset(&dev->mt76);
762 }
763
764 /* usb_sdio */
765 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)766 mt7921_usb_sdio_write_txwi(struct mt792x_dev *dev, struct mt76_wcid *wcid,
767 enum mt76_txq_id qid, struct ieee80211_sta *sta,
768 struct ieee80211_key_conf *key, int pid,
769 struct sk_buff *skb)
770 {
771 __le32 *txwi = (__le32 *)(skb->data - MT_SDIO_TXD_SIZE);
772
773 memset(txwi, 0, MT_SDIO_TXD_SIZE);
774 mt76_connac2_mac_write_txwi(&dev->mt76, txwi, skb, wcid, key, pid, qid, 0);
775 skb_push(skb, MT_SDIO_TXD_SIZE);
776 }
777
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)778 int mt7921_usb_sdio_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr,
779 enum mt76_txq_id qid, struct mt76_wcid *wcid,
780 struct ieee80211_sta *sta,
781 struct mt76_tx_info *tx_info)
782 {
783 struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
784 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_info->skb);
785 struct ieee80211_key_conf *key = info->control.hw_key;
786 struct sk_buff *skb = tx_info->skb;
787 int err, pad, pktid, type;
788
789 if (unlikely(tx_info->skb->len <= ETH_HLEN))
790 return -EINVAL;
791
792 err = skb_cow_head(skb, MT_SDIO_TXD_SIZE + MT_SDIO_HDR_SIZE);
793 if (err)
794 return err;
795
796 if (!wcid)
797 wcid = &dev->mt76.global_wcid;
798
799 if (sta) {
800 struct mt792x_sta *msta = (struct mt792x_sta *)sta->drv_priv;
801
802 if (time_after(jiffies, msta->last_txs + HZ / 4)) {
803 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
804 msta->last_txs = jiffies;
805 }
806 }
807
808 pktid = mt76_tx_status_skb_add(&dev->mt76, wcid, skb);
809 mt7921_usb_sdio_write_txwi(dev, wcid, qid, sta, key, pktid, skb);
810
811 type = mt76_is_sdio(mdev) ? MT7921_SDIO_DATA : 0;
812 mt7921_skb_add_usb_sdio_hdr(dev, skb, type);
813 pad = round_up(skb->len, 4) - skb->len;
814 if (mt76_is_usb(mdev))
815 pad += 4;
816
817 err = mt76_skb_adjust_pad(skb, pad);
818 if (err)
819 /* Release pktid in case of error. */
820 idr_remove(&wcid->pktid, pktid);
821
822 return err;
823 }
824 EXPORT_SYMBOL_GPL(mt7921_usb_sdio_tx_prepare_skb);
825
mt7921_usb_sdio_tx_complete_skb(struct mt76_dev * mdev,struct mt76_queue_entry * e)826 void mt7921_usb_sdio_tx_complete_skb(struct mt76_dev *mdev,
827 struct mt76_queue_entry *e)
828 {
829 __le32 *txwi = (__le32 *)(e->skb->data + MT_SDIO_HDR_SIZE);
830 unsigned int headroom = MT_SDIO_TXD_SIZE + MT_SDIO_HDR_SIZE;
831 struct ieee80211_sta *sta;
832 struct mt76_wcid *wcid;
833 u16 idx;
834
835 idx = le32_get_bits(txwi[1], MT_TXD1_WLAN_IDX);
836 wcid = rcu_dereference(mdev->wcid[idx]);
837 sta = wcid_to_sta(wcid);
838
839 if (sta && likely(e->skb->protocol != cpu_to_be16(ETH_P_PAE)))
840 mt76_connac2_tx_check_aggr(sta, txwi);
841
842 skb_pull(e->skb, headroom);
843 mt76_tx_complete_skb(mdev, e->wcid, e->skb);
844 }
845 EXPORT_SYMBOL_GPL(mt7921_usb_sdio_tx_complete_skb);
846
mt7921_usb_sdio_tx_status_data(struct mt76_dev * mdev,u8 * update)847 bool mt7921_usb_sdio_tx_status_data(struct mt76_dev *mdev, u8 *update)
848 {
849 struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
850
851 mt792x_mutex_acquire(dev);
852 mt7921_mac_sta_poll(dev);
853 mt792x_mutex_release(dev);
854
855 return false;
856 }
857 EXPORT_SYMBOL_GPL(mt7921_usb_sdio_tx_status_data);
858
859 #if IS_ENABLED(CONFIG_IPV6)
mt7921_set_ipv6_ns_work(struct work_struct * work)860 void mt7921_set_ipv6_ns_work(struct work_struct *work)
861 {
862 struct mt792x_dev *dev = container_of(work, struct mt792x_dev,
863 ipv6_ns_work);
864 struct sk_buff *skb;
865 int ret = 0;
866
867 do {
868 skb = skb_dequeue(&dev->ipv6_ns_list);
869
870 if (!skb)
871 break;
872
873 mt792x_mutex_acquire(dev);
874 ret = mt76_mcu_skb_send_msg(&dev->mt76, skb,
875 MCU_UNI_CMD(OFFLOAD), true);
876 mt792x_mutex_release(dev);
877
878 } while (!ret);
879
880 if (ret)
881 skb_queue_purge(&dev->ipv6_ns_list);
882 }
883 #endif
884