mac.c

  1// SPDX-License-Identifier: BSD-3-Clause-Clear
  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
 18bool 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
 27static u32 mt7921_mac_wtbl_lmac_addr(int idx, u8 offset)
 28{
 29	return MT_WTBL_LMAC_OFFS(idx, 0) + offset * 4;
 30}
 31
 32static void mt7921_mac_sta_poll(struct mt792x_dev *dev)
 33{
 34	static const u8 ac_to_tid[] = {
 35		[IEEE80211_AC_BE] = 0,
 36		[IEEE80211_AC_BK] = 1,
 37		[IEEE80211_AC_VI] = 4,
 38		[IEEE80211_AC_VO] = 6
 39	};
 40	struct ieee80211_sta *sta;
 41	struct mt792x_sta *msta;
 42	struct mt792x_link_sta *mlink;
 43	u32 tx_time[IEEE80211_NUM_ACS], rx_time[IEEE80211_NUM_ACS];
 44	LIST_HEAD(sta_poll_list);
 45	struct rate_info *rate;
 46	s8 rssi[4];
 47	int i;
 48
 49	spin_lock_bh(&dev->mt76.sta_poll_lock);
 50	list_splice_init(&dev->mt76.sta_poll_list, &sta_poll_list);
 51	spin_unlock_bh(&dev->mt76.sta_poll_lock);
 52
 53	while (true) {
 54		bool clear = false;
 55		u32 addr, val;
 56		u16 idx;
 57		u8 bw;
 58
 59		spin_lock_bh(&dev->mt76.sta_poll_lock);
 60		if (list_empty(&sta_poll_list)) {
 61			spin_unlock_bh(&dev->mt76.sta_poll_lock);
 62			break;
 63		}
 64		mlink = list_first_entry(&sta_poll_list,
 65					 struct mt792x_link_sta,
 66					 wcid.poll_list);
 67		msta = container_of(mlink, struct mt792x_sta, deflink);
 68		list_del_init(&mlink->wcid.poll_list);
 69		spin_unlock_bh(&dev->mt76.sta_poll_lock);
 70
 71		idx = mlink->wcid.idx;
 72		addr = mt7921_mac_wtbl_lmac_addr(idx, MT_WTBL_AC0_CTT_OFFSET);
 73
 74		for (i = 0; i < IEEE80211_NUM_ACS; i++) {
 75			u32 tx_last = mlink->airtime_ac[i];
 76			u32 rx_last = mlink->airtime_ac[i + 4];
 77
 78			mlink->airtime_ac[i] = mt76_rr(dev, addr);
 79			mlink->airtime_ac[i + 4] = mt76_rr(dev, addr + 4);
 80
 81			tx_time[i] = mlink->airtime_ac[i] - tx_last;
 82			rx_time[i] = mlink->airtime_ac[i + 4] - rx_last;
 83
 84			if ((tx_last | rx_last) & BIT(30))
 85				clear = true;
 86
 87			addr += 8;
 88		}
 89
 90		if (clear) {
 91			mt7921_mac_wtbl_update(dev, idx,
 92					       MT_WTBL_UPDATE_ADM_COUNT_CLEAR);
 93			memset(mlink->airtime_ac, 0, sizeof(mlink->airtime_ac));
 94		}
 95
 96		if (!mlink->wcid.sta)
 97			continue;
 98
 99		sta = container_of((void *)msta, struct ieee80211_sta,
100				   drv_priv);
101		for (i = 0; i < IEEE80211_NUM_ACS; i++) {
102			u8 q = mt76_connac_lmac_mapping(i);
103			u32 tx_cur = tx_time[q];
104			u32 rx_cur = rx_time[q];
105			u8 tid = ac_to_tid[i];
106
107			if (!tx_cur && !rx_cur)
108				continue;
109
110			ieee80211_sta_register_airtime(sta, tid, tx_cur,
111						       rx_cur);
112		}
113
114		/* We don't support reading GI info from txs packets.
115		 * For accurate tx status reporting and AQL improvement,
116		 * we need to make sure that flags match so polling GI
117		 * from per-sta counters directly.
118		 */
119		rate = &mlink->wcid.rate;
120		addr = mt7921_mac_wtbl_lmac_addr(idx,
121						 MT_WTBL_TXRX_CAP_RATE_OFFSET);
122		val = mt76_rr(dev, addr);
123
124		switch (rate->bw) {
125		case RATE_INFO_BW_160:
126			bw = IEEE80211_STA_RX_BW_160;
127			break;
128		case RATE_INFO_BW_80:
129			bw = IEEE80211_STA_RX_BW_80;
130			break;
131		case RATE_INFO_BW_40:
132			bw = IEEE80211_STA_RX_BW_40;
133			break;
134		default:
135			bw = IEEE80211_STA_RX_BW_20;
136			break;
137		}
138
139		if (rate->flags & RATE_INFO_FLAGS_HE_MCS) {
140			u8 offs = MT_WTBL_TXRX_RATE_G2_HE + 2 * bw;
141
142			rate->he_gi = (val & (0x3 << offs)) >> offs;
143		} else if (rate->flags &
144			   (RATE_INFO_FLAGS_VHT_MCS | RATE_INFO_FLAGS_MCS)) {
145			if (val & BIT(MT_WTBL_TXRX_RATE_G2 + bw))
146				rate->flags |= RATE_INFO_FLAGS_SHORT_GI;
147			else
148				rate->flags &= ~RATE_INFO_FLAGS_SHORT_GI;
149		}
150
151		/* get signal strength of resp frames (CTS/BA/ACK) */
152		addr = mt7921_mac_wtbl_lmac_addr(idx, 30);
153		val = mt76_rr(dev, addr);
154
155		rssi[0] = to_rssi(GENMASK(7, 0), val);
156		rssi[1] = to_rssi(GENMASK(15, 8), val);
157		rssi[2] = to_rssi(GENMASK(23, 16), val);
158		rssi[3] = to_rssi(GENMASK(31, 14), val);
159
160		mlink->ack_signal =
161			mt76_rx_signal(msta->vif->phy->mt76->antenna_mask, rssi);
162
163		ewma_avg_signal_add(&mlink->avg_ack_signal, -mlink->ack_signal);
164	}
165}
166
167static int
168mt7921_mac_fill_rx(struct mt792x_dev *dev, struct sk_buff *skb)
169{
170	u32 csum_mask = MT_RXD0_NORMAL_IP_SUM | MT_RXD0_NORMAL_UDP_TCP_SUM;
171	struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb;
172	bool hdr_trans, unicast, insert_ccmp_hdr = false;
173	u8 chfreq, qos_ctl = 0, remove_pad, amsdu_info;
174	u16 hdr_gap;
175	__le32 *rxv = NULL, *rxd = (__le32 *)skb->data;
176	struct mt76_phy *mphy = &dev->mt76.phy;
177	struct mt792x_phy *phy = &dev->phy;
178	struct ieee80211_supported_band *sband;
179	u32 csum_status = *(u32 *)skb->cb;
180	u32 rxd0 = le32_to_cpu(rxd[0]);
181	u32 rxd1 = le32_to_cpu(rxd[1]);
182	u32 rxd2 = le32_to_cpu(rxd[2]);
183	u32 rxd3 = le32_to_cpu(rxd[3]);
184	u32 rxd4 = le32_to_cpu(rxd[4]);
185	struct mt792x_sta *msta = NULL;
186	struct mt792x_link_sta *mlink;
187	u16 seq_ctrl = 0;
188	__le16 fc = 0;
189	u8 mode = 0;
190	int i, idx;
191
192	memset(status, 0, sizeof(*status));
193
194	if (rxd1 & MT_RXD1_NORMAL_BAND_IDX)
195		return -EINVAL;
196
197	if (!test_bit(MT76_STATE_RUNNING, &mphy->state))
198		return -EINVAL;
199
200	if (rxd2 & MT_RXD2_NORMAL_AMSDU_ERR)
201		return -EINVAL;
202
203	hdr_trans = rxd2 & MT_RXD2_NORMAL_HDR_TRANS;
204	if (hdr_trans && (rxd1 & MT_RXD1_NORMAL_CM))
205		return -EINVAL;
206
207	/* ICV error or CCMP/BIP/WPI MIC error */
208	if (rxd1 & MT_RXD1_NORMAL_ICV_ERR)
209		status->flag |= RX_FLAG_ONLY_MONITOR;
210
211	chfreq = FIELD_GET(MT_RXD3_NORMAL_CH_FREQ, rxd3);
212	unicast = FIELD_GET(MT_RXD3_NORMAL_ADDR_TYPE, rxd3) == MT_RXD3_NORMAL_U2M;
213	idx = FIELD_GET(MT_RXD1_NORMAL_WLAN_IDX, rxd1);
214	status->wcid = mt792x_rx_get_wcid(dev, idx, unicast);
215
216	if (status->wcid) {
217		mlink = container_of(status->wcid, struct mt792x_link_sta, wcid);
218		msta = container_of(mlink, struct mt792x_sta, deflink);
219		mt76_wcid_add_poll(&dev->mt76, &mlink->wcid);
220	}
221
222	mt792x_get_status_freq_info(status, chfreq);
223
224	switch (status->band) {
225	case NL80211_BAND_5GHZ:
226		sband = &mphy->sband_5g.sband;
227		break;
228	case NL80211_BAND_6GHZ:
229		sband = &mphy->sband_6g.sband;
230		break;
231	default:
232		sband = &mphy->sband_2g.sband;
233		break;
234	}
235
236	if (!sband->channels)
237		return -EINVAL;
238
239	if (mt76_is_mmio(&dev->mt76) && (rxd0 & csum_mask) == csum_mask &&
240	    !(csum_status & (BIT(0) | BIT(2) | BIT(3))))
241		skb->ip_summed = CHECKSUM_UNNECESSARY;
242
243	if (rxd1 & MT_RXD1_NORMAL_FCS_ERR)
244		status->flag |= RX_FLAG_FAILED_FCS_CRC;
245
246	if (rxd1 & MT_RXD1_NORMAL_TKIP_MIC_ERR)
247		status->flag |= RX_FLAG_MMIC_ERROR;
248
249	if (FIELD_GET(MT_RXD1_NORMAL_SEC_MODE, rxd1) != 0 &&
250	    !(rxd1 & (MT_RXD1_NORMAL_CLM | MT_RXD1_NORMAL_CM))) {
251		status->flag |= RX_FLAG_DECRYPTED;
252		status->flag |= RX_FLAG_IV_STRIPPED;
253		status->flag |= RX_FLAG_MMIC_STRIPPED | RX_FLAG_MIC_STRIPPED;
254	}
255
256	remove_pad = FIELD_GET(MT_RXD2_NORMAL_HDR_OFFSET, rxd2);
257
258	if (rxd2 & MT_RXD2_NORMAL_MAX_LEN_ERROR)
259		return -EINVAL;
260
261	rxd += 6;
262	if (rxd1 & MT_RXD1_NORMAL_GROUP_4) {
263		u32 v0 = le32_to_cpu(rxd[0]);
264		u32 v2 = le32_to_cpu(rxd[2]);
265
266		fc = cpu_to_le16(FIELD_GET(MT_RXD6_FRAME_CONTROL, v0));
267		seq_ctrl = FIELD_GET(MT_RXD8_SEQ_CTRL, v2);
268		qos_ctl = FIELD_GET(MT_RXD8_QOS_CTL, v2);
269
270		rxd += 4;
271		if ((u8 *)rxd - skb->data >= skb->len)
272			return -EINVAL;
273	}
274
275	if (rxd1 & MT_RXD1_NORMAL_GROUP_1) {
276		u8 *data = (u8 *)rxd;
277
278		if (status->flag & RX_FLAG_DECRYPTED) {
279			switch (FIELD_GET(MT_RXD1_NORMAL_SEC_MODE, rxd1)) {
280			case MT_CIPHER_AES_CCMP:
281			case MT_CIPHER_CCMP_CCX:
282			case MT_CIPHER_CCMP_256:
283				insert_ccmp_hdr =
284					FIELD_GET(MT_RXD2_NORMAL_FRAG, rxd2);
285				fallthrough;
286			case MT_CIPHER_TKIP:
287			case MT_CIPHER_TKIP_NO_MIC:
288			case MT_CIPHER_GCMP:
289			case MT_CIPHER_GCMP_256:
290				status->iv[0] = data[5];
291				status->iv[1] = data[4];
292				status->iv[2] = data[3];
293				status->iv[3] = data[2];
294				status->iv[4] = data[1];
295				status->iv[5] = data[0];
296				break;
297			default:
298				break;
299			}
300		}
301		rxd += 4;
302		if ((u8 *)rxd - skb->data >= skb->len)
303			return -EINVAL;
304	}
305
306	if (rxd1 & MT_RXD1_NORMAL_GROUP_2) {
307		status->timestamp = le32_to_cpu(rxd[0]);
308		status->flag |= RX_FLAG_MACTIME_START;
309
310		if (!(rxd2 & MT_RXD2_NORMAL_NON_AMPDU)) {
311			status->flag |= RX_FLAG_AMPDU_DETAILS;
312
313			/* all subframes of an A-MPDU have the same timestamp */
314			if (phy->rx_ampdu_ts != status->timestamp) {
315				if (!++phy->ampdu_ref)
316					phy->ampdu_ref++;
317			}
318			phy->rx_ampdu_ts = status->timestamp;
319
320			status->ampdu_ref = phy->ampdu_ref;
321		}
322
323		rxd += 2;
324		if ((u8 *)rxd - skb->data >= skb->len)
325			return -EINVAL;
326	}
327
328	/* RXD Group 3 - P-RXV */
329	if (rxd1 & MT_RXD1_NORMAL_GROUP_3) {
330		u32 v0, v1;
331		int ret;
332
333		rxv = rxd;
334		rxd += 2;
335		if ((u8 *)rxd - skb->data >= skb->len)
336			return -EINVAL;
337
338		v0 = le32_to_cpu(rxv[0]);
339		v1 = le32_to_cpu(rxv[1]);
340
341		if (v0 & MT_PRXV_HT_AD_CODE)
342			status->enc_flags |= RX_ENC_FLAG_LDPC;
343
344		ret = mt76_connac2_mac_fill_rx_rate(&dev->mt76, status, sband,
345						    rxv, &mode);
346		if (ret < 0)
347			return ret;
348
349		if (rxd1 & MT_RXD1_NORMAL_GROUP_5) {
350			rxd += 6;
351			if ((u8 *)rxd - skb->data >= skb->len)
352				return -EINVAL;
353
354			rxv = rxd;
355			/* Monitor mode would use RCPI described in GROUP 5
356			 * instead.
357			 */
358			v1 = le32_to_cpu(rxv[0]);
359
360			rxd += 12;
361			if ((u8 *)rxd - skb->data >= skb->len)
362				return -EINVAL;
363		}
364
365		status->chains = mphy->antenna_mask;
366		status->chain_signal[0] = to_rssi(MT_PRXV_RCPI0, v1);
367		status->chain_signal[1] = to_rssi(MT_PRXV_RCPI1, v1);
368		status->chain_signal[2] = to_rssi(MT_PRXV_RCPI2, v1);
369		status->chain_signal[3] = to_rssi(MT_PRXV_RCPI3, v1);
370		status->signal = -128;
371		for (i = 0; i < hweight8(mphy->antenna_mask); i++) {
372			if (!(status->chains & BIT(i)) ||
373			    status->chain_signal[i] >= 0)
374				continue;
375
376			status->signal = max(status->signal,
377					     status->chain_signal[i]);
378		}
379	}
380
381	amsdu_info = FIELD_GET(MT_RXD4_NORMAL_PAYLOAD_FORMAT, rxd4);
382	status->amsdu = !!amsdu_info;
383	if (status->amsdu) {
384		status->first_amsdu = amsdu_info == MT_RXD4_FIRST_AMSDU_FRAME;
385		status->last_amsdu = amsdu_info == MT_RXD4_LAST_AMSDU_FRAME;
386	}
387
388	hdr_gap = (u8 *)rxd - skb->data + 2 * remove_pad;
389	if (hdr_trans && ieee80211_has_morefrags(fc)) {
390		struct ieee80211_vif *vif;
391		int err;
392
393		if (!msta || !msta->vif)
394			return -EINVAL;
395
396		vif = container_of((void *)msta->vif, struct ieee80211_vif,
397				   drv_priv);
398		err = mt76_connac2_reverse_frag0_hdr_trans(vif, skb, hdr_gap);
399		if (err)
400			return err;
401
402		hdr_trans = false;
403	} else {
404		skb_pull(skb, hdr_gap);
405		if (!hdr_trans && status->amsdu) {
406			memmove(skb->data + 2, skb->data,
407				ieee80211_get_hdrlen_from_skb(skb));
408			skb_pull(skb, 2);
409		}
410	}
411
412	if (!hdr_trans) {
413		struct ieee80211_hdr *hdr;
414
415		if (insert_ccmp_hdr) {
416			u8 key_id = FIELD_GET(MT_RXD1_NORMAL_KEY_ID, rxd1);
417
418			mt76_insert_ccmp_hdr(skb, key_id);
419		}
420
421		hdr = mt76_skb_get_hdr(skb);
422		fc = hdr->frame_control;
423		if (ieee80211_is_data_qos(fc)) {
424			seq_ctrl = le16_to_cpu(hdr->seq_ctrl);
425			qos_ctl = *ieee80211_get_qos_ctl(hdr);
426		}
427	} else {
428		status->flag |= RX_FLAG_8023;
429	}
430
431	mt792x_mac_assoc_rssi(dev, skb);
432
433	if (rxv && mode >= MT_PHY_TYPE_HE_SU && !(status->flag & RX_FLAG_8023))
434		mt76_connac2_mac_decode_he_radiotap(&dev->mt76, skb, rxv, mode);
435
436	if (!status->wcid || !ieee80211_is_data_qos(fc))
437		return 0;
438
439	status->aggr = unicast && !ieee80211_is_qos_nullfunc(fc);
440	status->seqno = IEEE80211_SEQ_TO_SN(seq_ctrl);
441	status->qos_ctl = qos_ctl;
442
443	return 0;
444}
445
446void mt7921_mac_add_txs(struct mt792x_dev *dev, void *data)
447{
448	struct mt792x_link_sta *mlink;
449	struct mt76_wcid *wcid;
450	__le32 *txs_data = data;
451	u16 wcidx;
452	u8 pid;
453
454	if (le32_get_bits(txs_data[0], MT_TXS0_TXS_FORMAT) > 1)
455		return;
456
457	wcidx = le32_get_bits(txs_data[2], MT_TXS2_WCID);
458	pid = le32_get_bits(txs_data[3], MT_TXS3_PID);
459
460	if (pid < MT_PACKET_ID_FIRST)
461		return;
462
463	if (wcidx >= MT792x_WTBL_SIZE)
464		return;
465
466	rcu_read_lock();
467
468	wcid = mt76_wcid_ptr(dev, wcidx);
469	if (!wcid)
470		goto out;
471
472	mlink = container_of(wcid, struct mt792x_link_sta, wcid);
473
474	mt76_connac2_mac_add_txs_skb(&dev->mt76, wcid, pid, txs_data);
475	if (!wcid->sta)
476		goto out;
477
478	mt76_wcid_add_poll(&dev->mt76, &mlink->wcid);
479
480out:
481	rcu_read_unlock();
482}
483
484static void mt7921_mac_tx_free(struct mt792x_dev *dev, void *data, int len)
485{
486	struct mt76_connac_tx_free *free = data;
487	__le32 *tx_info = (__le32 *)(data + sizeof(*free));
488	struct mt76_dev *mdev = &dev->mt76;
489	struct mt76_txwi_cache *txwi;
490	struct ieee80211_sta *sta = NULL;
491	struct mt76_wcid *wcid = NULL;
492	struct sk_buff *skb, *tmp;
493	void *end = data + len;
494	LIST_HEAD(free_list);
495	bool wake = false;
496	u8 i, count;
497
498	/* clean DMA queues and unmap buffers first */
499	mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[MT_TXQ_PSD], false);
500	mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[MT_TXQ_BE], false);
501
502	count = le16_get_bits(free->ctrl, MT_TX_FREE_MSDU_CNT);
503	if (WARN_ON_ONCE((void *)&tx_info[count] > end))
504		return;
505
506	for (i = 0; i < count; i++) {
507		u32 msdu, info = le32_to_cpu(tx_info[i]);
508		u8 stat;
509
510		/* 1'b1: new wcid pair.
511		 * 1'b0: msdu_id with the same 'wcid pair' as above.
512		 */
513		if (info & MT_TX_FREE_PAIR) {
514			struct mt792x_link_sta *mlink;
515			u16 idx;
516
517			count++;
518			idx = FIELD_GET(MT_TX_FREE_WLAN_ID, info);
519			wcid = mt76_wcid_ptr(dev, idx);
520			sta = wcid_to_sta(wcid);
521			if (!sta)
522				continue;
523
524			mlink = container_of(wcid, struct mt792x_link_sta, wcid);
525			mt76_wcid_add_poll(&dev->mt76, &mlink->wcid);
526			continue;
527		}
528
529		msdu = FIELD_GET(MT_TX_FREE_MSDU_ID, info);
530		stat = FIELD_GET(MT_TX_FREE_STATUS, info);
531
532		if (wcid) {
533			wcid->stats.tx_retries +=
534				FIELD_GET(MT_TX_FREE_COUNT, info) - 1;
535			wcid->stats.tx_failed += !!stat;
536		}
537
538		txwi = mt76_token_release(mdev, msdu, &wake);
539		if (!txwi)
540			continue;
541
542		mt76_connac2_txwi_free(mdev, txwi, sta, &free_list);
543	}
544
545	if (wake)
546		mt76_set_tx_blocked(&dev->mt76, false);
547
548	list_for_each_entry_safe(skb, tmp, &free_list, list) {
549		skb_list_del_init(skb);
550		napi_consume_skb(skb, 1);
551	}
552
553	rcu_read_lock();
554	mt7921_mac_sta_poll(dev);
555	rcu_read_unlock();
556
557	mt76_worker_schedule(&dev->mt76.tx_worker);
558}
559
560bool mt7921_rx_check(struct mt76_dev *mdev, void *data, int len)
561{
562	struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
563	__le32 *rxd = (__le32 *)data;
564	__le32 *end = (__le32 *)&rxd[len / 4];
565	enum rx_pkt_type type;
566
567	type = le32_get_bits(rxd[0], MT_RXD0_PKT_TYPE);
568
569	switch (type) {
570	case PKT_TYPE_TXRX_NOTIFY:
571		/* PKT_TYPE_TXRX_NOTIFY can be received only by mmio devices */
572		mt7921_mac_tx_free(dev, data, len); /* mmio */
573		return false;
574	case PKT_TYPE_TXS:
575		for (rxd += 2; rxd + 8 <= end; rxd += 8)
576			mt7921_mac_add_txs(dev, rxd);
577		return false;
578	default:
579		return true;
580	}
581}
582EXPORT_SYMBOL_GPL(mt7921_rx_check);
583
584void mt7921_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q,
585			 struct sk_buff *skb, u32 *info)
586{
587	struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
588	__le32 *rxd = (__le32 *)skb->data;
589	__le32 *end = (__le32 *)&skb->data[skb->len];
590	enum rx_pkt_type type;
591	u16 flag;
592
593	type = le32_get_bits(rxd[0], MT_RXD0_PKT_TYPE);
594	flag = le32_get_bits(rxd[0], MT_RXD0_PKT_FLAG);
595
596	if (type == PKT_TYPE_RX_EVENT && flag == 0x1)
597		type = PKT_TYPE_NORMAL_MCU;
598
599	switch (type) {
600	case PKT_TYPE_TXRX_NOTIFY:
601		/* PKT_TYPE_TXRX_NOTIFY can be received only by mmio devices */
602		mt7921_mac_tx_free(dev, skb->data, skb->len);
603		napi_consume_skb(skb, 1);
604		break;
605	case PKT_TYPE_RX_EVENT:
606		mt7921_mcu_rx_event(dev, skb);
607		break;
608	case PKT_TYPE_TXS:
609		for (rxd += 2; rxd + 8 <= end; rxd += 8)
610			mt7921_mac_add_txs(dev, rxd);
611		dev_kfree_skb(skb);
612		break;
613	case PKT_TYPE_NORMAL_MCU:
614	case PKT_TYPE_NORMAL:
615		if (!mt7921_mac_fill_rx(dev, skb)) {
616			mt76_rx(&dev->mt76, q, skb);
617			return;
618		}
619		fallthrough;
620	default:
621		dev_kfree_skb(skb);
622		break;
623	}
624}
625EXPORT_SYMBOL_GPL(mt7921_queue_rx_skb);
626
627static void
628mt7921_vif_connect_iter(void *priv, u8 *mac,
629			struct ieee80211_vif *vif)
630{
631	struct mt792x_vif *mvif = (struct mt792x_vif *)vif->drv_priv;
632	struct mt792x_dev *dev = mvif->phy->dev;
633	struct ieee80211_hw *hw = mt76_hw(dev);
634
635	if (vif->type == NL80211_IFTYPE_STATION)
636		ieee80211_disconnect(vif, true);
637
638	mt76_connac_mcu_uni_add_dev(&dev->mphy, &vif->bss_conf,
639				    &mvif->bss_conf.mt76,
640				    &mvif->sta.deflink.wcid, true);
641	mt7921_mcu_set_tx(dev, vif);
642
643	if (vif->type == NL80211_IFTYPE_AP) {
644		mt76_connac_mcu_uni_add_bss(dev->phy.mt76, vif, &mvif->sta.deflink.wcid,
645					    true, NULL);
646		mt7921_mcu_sta_update(dev, NULL, vif, true,
647				      MT76_STA_INFO_STATE_NONE);
648		mt7921_mcu_uni_add_beacon_offload(dev, hw, vif, true);
649	}
650}
651
652/* system error recovery */
653void mt7921_mac_reset_work(struct work_struct *work)
654{
655	struct mt792x_dev *dev = container_of(work, struct mt792x_dev,
656					      reset_work);
657	struct ieee80211_hw *hw = mt76_hw(dev);
658	struct mt76_connac_pm *pm = &dev->pm;
659	int i, ret;
660
661	dev_dbg(dev->mt76.dev, "chip reset\n");
662	set_bit(MT76_RESET, &dev->mphy.state);
663	dev->hw_full_reset = true;
664	ieee80211_stop_queues(hw);
665
666	cancel_delayed_work_sync(&dev->mphy.mac_work);
667	cancel_delayed_work_sync(&pm->ps_work);
668	cancel_work_sync(&pm->wake_work);
669
670	for (i = 0; i < 10; i++) {
671		mutex_lock(&dev->mt76.mutex);
672		ret = mt792x_dev_reset(dev);
673		mutex_unlock(&dev->mt76.mutex);
674
675		if (!ret)
676			break;
677	}
678	if (mt76_is_sdio(&dev->mt76) && atomic_read(&dev->mt76.bus_hung))
679		return;
680
681	if (i == 10)
682		dev_err(dev->mt76.dev, "chip reset failed\n");
683
684	if (test_and_clear_bit(MT76_HW_SCANNING, &dev->mphy.state)) {
685		struct cfg80211_scan_info info = {
686			.aborted = true,
687		};
688
689		ieee80211_scan_completed(dev->mphy.hw, &info);
690	}
691
692	dev->hw_full_reset = false;
693	clear_bit(MT76_RESET, &dev->mphy.state);
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
702void 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 */
750static void
751mt7921_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
763int 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->deflink.last_txs + HZ / 4)) {
788			info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
789			msta->deflink.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	mt792x_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}
809EXPORT_SYMBOL_GPL(mt7921_usb_sdio_tx_prepare_skb);
810
811void 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 = __mt76_wcid_ptr(mdev, 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}
830EXPORT_SYMBOL_GPL(mt7921_usb_sdio_tx_complete_skb);
831
832bool 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}
842EXPORT_SYMBOL_GPL(mt7921_usb_sdio_tx_status_data);
843
844#if IS_ENABLED(CONFIG_IPV6)
845void 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