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 	set_bit(MT76_RESET, &dev->mphy.state);
667 	dev->hw_full_reset = true;
668 	ieee80211_stop_queues(hw);
669 
670 	cancel_delayed_work_sync(&dev->mphy.mac_work);
671 	cancel_delayed_work_sync(&pm->ps_work);
672 	cancel_work_sync(&pm->wake_work);
673 
674 	for (i = 0; i < 10; i++) {
675 		mutex_lock(&dev->mt76.mutex);
676 		ret = mt792x_dev_reset(dev);
677 		mutex_unlock(&dev->mt76.mutex);
678 
679 		if (!ret)
680 			break;
681 	}
682 
683 	if (i == 10)
684 		dev_err(dev->mt76.dev, "chip reset failed\n");
685 
686 	if (test_and_clear_bit(MT76_HW_SCANNING, &dev->mphy.state)) {
687 		struct cfg80211_scan_info info = {
688 			.aborted = true,
689 		};
690 
691 		ieee80211_scan_completed(dev->mphy.hw, &info);
692 	}
693 
694 	dev->hw_full_reset = false;
695 	clear_bit(MT76_RESET, &dev->mphy.state);
696 	pm->suspended = false;
697 	ieee80211_wake_queues(hw);
698 	ieee80211_iterate_active_interfaces(hw,
699 					    IEEE80211_IFACE_ITER_RESUME_ALL,
700 					    mt7921_vif_connect_iter, NULL);
701 	mt76_connac_power_save_sched(&dev->mt76.phy, pm);
702 }
703 
mt7921_coredump_work(struct work_struct * work)704 void mt7921_coredump_work(struct work_struct *work)
705 {
706 	struct mt792x_dev *dev;
707 	char *dump, *data;
708 
709 	dev = (struct mt792x_dev *)container_of(work, struct mt792x_dev,
710 						coredump.work.work);
711 
712 	if (time_is_after_jiffies(dev->coredump.last_activity +
713 				  4 * MT76_CONNAC_COREDUMP_TIMEOUT)) {
714 		queue_delayed_work(dev->mt76.wq, &dev->coredump.work,
715 				   MT76_CONNAC_COREDUMP_TIMEOUT);
716 		return;
717 	}
718 
719 	dump = vzalloc(MT76_CONNAC_COREDUMP_SZ);
720 	data = dump;
721 
722 	while (true) {
723 		struct sk_buff *skb;
724 
725 		spin_lock_bh(&dev->mt76.lock);
726 		skb = __skb_dequeue(&dev->coredump.msg_list);
727 		spin_unlock_bh(&dev->mt76.lock);
728 
729 		if (!skb)
730 			break;
731 
732 		skb_pull(skb, sizeof(struct mt76_connac2_mcu_rxd));
733 		if (!dump || data + skb->len - dump > MT76_CONNAC_COREDUMP_SZ) {
734 			dev_kfree_skb(skb);
735 			continue;
736 		}
737 
738 		memcpy(data, skb->data, skb->len);
739 		data += skb->len;
740 
741 		dev_kfree_skb(skb);
742 	}
743 
744 	if (dump)
745 		dev_coredumpv(dev->mt76.dev, dump, MT76_CONNAC_COREDUMP_SZ,
746 			      GFP_KERNEL);
747 
748 	mt792x_reset(&dev->mt76);
749 }
750 
751 /* usb_sdio */
752 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)753 mt7921_usb_sdio_write_txwi(struct mt792x_dev *dev, struct mt76_wcid *wcid,
754 			   enum mt76_txq_id qid, struct ieee80211_sta *sta,
755 			   struct ieee80211_key_conf *key, int pid,
756 			   struct sk_buff *skb)
757 {
758 	__le32 *txwi = (__le32 *)(skb->data - MT_SDIO_TXD_SIZE);
759 
760 	memset(txwi, 0, MT_SDIO_TXD_SIZE);
761 	mt76_connac2_mac_write_txwi(&dev->mt76, txwi, skb, wcid, key, pid, qid, 0);
762 	skb_push(skb, MT_SDIO_TXD_SIZE);
763 }
764 
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)765 int mt7921_usb_sdio_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr,
766 				   enum mt76_txq_id qid, struct mt76_wcid *wcid,
767 				   struct ieee80211_sta *sta,
768 				   struct mt76_tx_info *tx_info)
769 {
770 	struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
771 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_info->skb);
772 	struct ieee80211_key_conf *key = info->control.hw_key;
773 	struct sk_buff *skb = tx_info->skb;
774 	int err, pad, pktid, type;
775 
776 	if (unlikely(tx_info->skb->len <= ETH_HLEN))
777 		return -EINVAL;
778 
779 	err = skb_cow_head(skb, MT_SDIO_TXD_SIZE + MT_SDIO_HDR_SIZE);
780 	if (err)
781 		return err;
782 
783 	if (!wcid)
784 		wcid = &dev->mt76.global_wcid;
785 
786 	if (sta) {
787 		struct mt792x_sta *msta = (struct mt792x_sta *)sta->drv_priv;
788 
789 		if (time_after(jiffies, msta->last_txs + HZ / 4)) {
790 			info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
791 			msta->last_txs = jiffies;
792 		}
793 	}
794 
795 	pktid = mt76_tx_status_skb_add(&dev->mt76, wcid, skb);
796 	mt7921_usb_sdio_write_txwi(dev, wcid, qid, sta, key, pktid, skb);
797 
798 	type = mt76_is_sdio(mdev) ? MT7921_SDIO_DATA : 0;
799 	mt7921_skb_add_usb_sdio_hdr(dev, skb, type);
800 	pad = round_up(skb->len, 4) - skb->len;
801 	if (mt76_is_usb(mdev))
802 		pad += 4;
803 
804 	err = mt76_skb_adjust_pad(skb, pad);
805 	if (err)
806 		/* Release pktid in case of error. */
807 		idr_remove(&wcid->pktid, pktid);
808 
809 	return err;
810 }
811 EXPORT_SYMBOL_GPL(mt7921_usb_sdio_tx_prepare_skb);
812 
mt7921_usb_sdio_tx_complete_skb(struct mt76_dev * mdev,struct mt76_queue_entry * e)813 void mt7921_usb_sdio_tx_complete_skb(struct mt76_dev *mdev,
814 				     struct mt76_queue_entry *e)
815 {
816 	__le32 *txwi = (__le32 *)(e->skb->data + MT_SDIO_HDR_SIZE);
817 	unsigned int headroom = MT_SDIO_TXD_SIZE + MT_SDIO_HDR_SIZE;
818 	struct ieee80211_sta *sta;
819 	struct mt76_wcid *wcid;
820 	u16 idx;
821 
822 	idx = le32_get_bits(txwi[1], MT_TXD1_WLAN_IDX);
823 	wcid = rcu_dereference(mdev->wcid[idx]);
824 	sta = wcid_to_sta(wcid);
825 
826 	if (sta && likely(e->skb->protocol != cpu_to_be16(ETH_P_PAE)))
827 		mt76_connac2_tx_check_aggr(sta, txwi);
828 
829 	skb_pull(e->skb, headroom);
830 	mt76_tx_complete_skb(mdev, e->wcid, e->skb);
831 }
832 EXPORT_SYMBOL_GPL(mt7921_usb_sdio_tx_complete_skb);
833 
mt7921_usb_sdio_tx_status_data(struct mt76_dev * mdev,u8 * update)834 bool mt7921_usb_sdio_tx_status_data(struct mt76_dev *mdev, u8 *update)
835 {
836 	struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
837 
838 	mt792x_mutex_acquire(dev);
839 	mt7921_mac_sta_poll(dev);
840 	mt792x_mutex_release(dev);
841 
842 	return false;
843 }
844 EXPORT_SYMBOL_GPL(mt7921_usb_sdio_tx_status_data);
845 
846 #if IS_ENABLED(CONFIG_IPV6)
mt7921_set_ipv6_ns_work(struct work_struct * work)847 void mt7921_set_ipv6_ns_work(struct work_struct *work)
848 {
849 	struct mt792x_dev *dev = container_of(work, struct mt792x_dev,
850 					      ipv6_ns_work);
851 	struct sk_buff *skb;
852 	int ret = 0;
853 
854 	do {
855 		skb = skb_dequeue(&dev->ipv6_ns_list);
856 
857 		if (!skb)
858 			break;
859 
860 		mt792x_mutex_acquire(dev);
861 		ret = mt76_mcu_skb_send_msg(&dev->mt76, skb,
862 					    MCU_UNI_CMD(OFFLOAD), true);
863 		mt792x_mutex_release(dev);
864 
865 	} while (!ret);
866 
867 	if (ret)
868 		skb_queue_purge(&dev->ipv6_ns_list);
869 }
870 #endif
871