Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 868 insertions, 0 deletions

diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
new file mode 100644
index 0000000000..21f9374542
--- /dev/null
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
@@ -0,0 +1,868 @@
+// SPDX-License-Identifier: ISC
+/* Copyright (C) 2020 MediaTek Inc. */
+
+#include <linux/devcoredump.h>
+#include <linux/etherdevice.h>
+#include <linux/timekeeping.h>
+#include "mt7921.h"
+#include "../dma.h"
+#include "../mt76_connac2_mac.h"
+#include "mcu.h"
+
+#define MT_WTBL_TXRX_CAP_RATE_OFFSET	7
+#define MT_WTBL_TXRX_RATE_G2_HE		24
+#define MT_WTBL_TXRX_RATE_G2		12
+
+#define MT_WTBL_AC0_CTT_OFFSET		20
+
+bool mt7921_mac_wtbl_update(struct mt792x_dev *dev, int idx, u32 mask)
+{
+	mt76_rmw(dev, MT_WTBL_UPDATE, MT_WTBL_UPDATE_WLAN_IDX,
+		 FIELD_PREP(MT_WTBL_UPDATE_WLAN_IDX, idx) | mask);
+
+	return mt76_poll(dev, MT_WTBL_UPDATE, MT_WTBL_UPDATE_BUSY,
+			 0, 5000);
+}
+
+static u32 mt7921_mac_wtbl_lmac_addr(int idx, u8 offset)
+{
+	return MT_WTBL_LMAC_OFFS(idx, 0) + offset * 4;
+}
+
+static void mt7921_mac_sta_poll(struct mt792x_dev *dev)
+{
+	static const u8 ac_to_tid[] = {
+		[IEEE80211_AC_BE] = 0,
+		[IEEE80211_AC_BK] = 1,
+		[IEEE80211_AC_VI] = 4,
+		[IEEE80211_AC_VO] = 6
+	};
+	struct ieee80211_sta *sta;
+	struct mt792x_sta *msta;
+	u32 tx_time[IEEE80211_NUM_ACS], rx_time[IEEE80211_NUM_ACS];
+	LIST_HEAD(sta_poll_list);
+	struct rate_info *rate;
+	s8 rssi[4];
+	int i;
+
+	spin_lock_bh(&dev->mt76.sta_poll_lock);
+	list_splice_init(&dev->mt76.sta_poll_list, &sta_poll_list);
+	spin_unlock_bh(&dev->mt76.sta_poll_lock);
+
+	while (true) {
+		bool clear = false;
+		u32 addr, val;
+		u16 idx;
+		u8 bw;
+
+		spin_lock_bh(&dev->mt76.sta_poll_lock);
+		if (list_empty(&sta_poll_list)) {
+			spin_unlock_bh(&dev->mt76.sta_poll_lock);
+			break;
+		}
+		msta = list_first_entry(&sta_poll_list,
+					struct mt792x_sta, wcid.poll_list);
+		list_del_init(&msta->wcid.poll_list);
+		spin_unlock_bh(&dev->mt76.sta_poll_lock);
+
+		idx = msta->wcid.idx;
+		addr = mt7921_mac_wtbl_lmac_addr(idx, MT_WTBL_AC0_CTT_OFFSET);
+
+		for (i = 0; i < IEEE80211_NUM_ACS; i++) {
+			u32 tx_last = msta->airtime_ac[i];
+			u32 rx_last = msta->airtime_ac[i + 4];
+
+			msta->airtime_ac[i] = mt76_rr(dev, addr);
+			msta->airtime_ac[i + 4] = mt76_rr(dev, addr + 4);
+
+			tx_time[i] = msta->airtime_ac[i] - tx_last;
+			rx_time[i] = msta->airtime_ac[i + 4] - rx_last;
+
+			if ((tx_last | rx_last) & BIT(30))
+				clear = true;
+
+			addr += 8;
+		}
+
+		if (clear) {
+			mt7921_mac_wtbl_update(dev, idx,
+					       MT_WTBL_UPDATE_ADM_COUNT_CLEAR);
+			memset(msta->airtime_ac, 0, sizeof(msta->airtime_ac));
+		}
+
+		if (!msta->wcid.sta)
+			continue;
+
+		sta = container_of((void *)msta, struct ieee80211_sta,
+				   drv_priv);
+		for (i = 0; i < IEEE80211_NUM_ACS; i++) {
+			u8 q = mt76_connac_lmac_mapping(i);
+			u32 tx_cur = tx_time[q];
+			u32 rx_cur = rx_time[q];
+			u8 tid = ac_to_tid[i];
+
+			if (!tx_cur && !rx_cur)
+				continue;
+
+			ieee80211_sta_register_airtime(sta, tid, tx_cur,
+						       rx_cur);
+		}
+
+		/* We don't support reading GI info from txs packets.
+		 * For accurate tx status reporting and AQL improvement,
+		 * we need to make sure that flags match so polling GI
+		 * from per-sta counters directly.
+		 */
+		rate = &msta->wcid.rate;
+		addr = mt7921_mac_wtbl_lmac_addr(idx,
+						 MT_WTBL_TXRX_CAP_RATE_OFFSET);
+		val = mt76_rr(dev, addr);
+
+		switch (rate->bw) {
+		case RATE_INFO_BW_160:
+			bw = IEEE80211_STA_RX_BW_160;
+			break;
+		case RATE_INFO_BW_80:
+			bw = IEEE80211_STA_RX_BW_80;
+			break;
+		case RATE_INFO_BW_40:
+			bw = IEEE80211_STA_RX_BW_40;
+			break;
+		default:
+			bw = IEEE80211_STA_RX_BW_20;
+			break;
+		}
+
+		if (rate->flags & RATE_INFO_FLAGS_HE_MCS) {
+			u8 offs = MT_WTBL_TXRX_RATE_G2_HE + 2 * bw;
+
+			rate->he_gi = (val & (0x3 << offs)) >> offs;
+		} else if (rate->flags &
+			   (RATE_INFO_FLAGS_VHT_MCS | RATE_INFO_FLAGS_MCS)) {
+			if (val & BIT(MT_WTBL_TXRX_RATE_G2 + bw))
+				rate->flags |= RATE_INFO_FLAGS_SHORT_GI;
+			else
+				rate->flags &= ~RATE_INFO_FLAGS_SHORT_GI;
+		}
+
+		/* get signal strength of resp frames (CTS/BA/ACK) */
+		addr = mt7921_mac_wtbl_lmac_addr(idx, 30);
+		val = mt76_rr(dev, addr);
+
+		rssi[0] = to_rssi(GENMASK(7, 0), val);
+		rssi[1] = to_rssi(GENMASK(15, 8), val);
+		rssi[2] = to_rssi(GENMASK(23, 16), val);
+		rssi[3] = to_rssi(GENMASK(31, 14), val);
+
+		msta->ack_signal =
+			mt76_rx_signal(msta->vif->phy->mt76->antenna_mask, rssi);
+
+		ewma_avg_signal_add(&msta->avg_ack_signal, -msta->ack_signal);
+	}
+}
+
+static int
+mt7921_mac_fill_rx(struct mt792x_dev *dev, struct sk_buff *skb)
+{
+	u32 csum_mask = MT_RXD0_NORMAL_IP_SUM | MT_RXD0_NORMAL_UDP_TCP_SUM;
+	struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb;
+	bool hdr_trans, unicast, insert_ccmp_hdr = false;
+	u8 chfreq, qos_ctl = 0, remove_pad, amsdu_info;
+	u16 hdr_gap;
+	__le32 *rxv = NULL, *rxd = (__le32 *)skb->data;
+	struct mt76_phy *mphy = &dev->mt76.phy;
+	struct mt792x_phy *phy = &dev->phy;
+	struct ieee80211_supported_band *sband;
+	u32 csum_status = *(u32 *)skb->cb;
+	u32 rxd0 = le32_to_cpu(rxd[0]);
+	u32 rxd1 = le32_to_cpu(rxd[1]);
+	u32 rxd2 = le32_to_cpu(rxd[2]);
+	u32 rxd3 = le32_to_cpu(rxd[3]);
+	u32 rxd4 = le32_to_cpu(rxd[4]);
+	struct mt792x_sta *msta = NULL;
+	u16 seq_ctrl = 0;
+	__le16 fc = 0;
+	u8 mode = 0;
+	int i, idx;
+
+	memset(status, 0, sizeof(*status));
+
+	if (rxd1 & MT_RXD1_NORMAL_BAND_IDX)
+		return -EINVAL;
+
+	if (!test_bit(MT76_STATE_RUNNING, &mphy->state))
+		return -EINVAL;
+
+	if (rxd2 & MT_RXD2_NORMAL_AMSDU_ERR)
+		return -EINVAL;
+
+	hdr_trans = rxd2 & MT_RXD2_NORMAL_HDR_TRANS;
+	if (hdr_trans && (rxd1 & MT_RXD1_NORMAL_CM))
+		return -EINVAL;
+
+	/* ICV error or CCMP/BIP/WPI MIC error */
+	if (rxd1 & MT_RXD1_NORMAL_ICV_ERR)
+		status->flag |= RX_FLAG_ONLY_MONITOR;
+
+	chfreq = FIELD_GET(MT_RXD3_NORMAL_CH_FREQ, rxd3);
+	unicast = FIELD_GET(MT_RXD3_NORMAL_ADDR_TYPE, rxd3) == MT_RXD3_NORMAL_U2M;
+	idx = FIELD_GET(MT_RXD1_NORMAL_WLAN_IDX, rxd1);
+	status->wcid = mt792x_rx_get_wcid(dev, idx, unicast);
+
+	if (status->wcid) {
+		msta = container_of(status->wcid, struct mt792x_sta, wcid);
+		spin_lock_bh(&dev->mt76.sta_poll_lock);
+		if (list_empty(&msta->wcid.poll_list))
+			list_add_tail(&msta->wcid.poll_list,
+				      &dev->mt76.sta_poll_list);
+		spin_unlock_bh(&dev->mt76.sta_poll_lock);
+	}
+
+	mt792x_get_status_freq_info(status, chfreq);
+
+	switch (status->band) {
+	case NL80211_BAND_5GHZ:
+		sband = &mphy->sband_5g.sband;
+		break;
+	case NL80211_BAND_6GHZ:
+		sband = &mphy->sband_6g.sband;
+		break;
+	default:
+		sband = &mphy->sband_2g.sband;
+		break;
+	}
+
+	if (!sband->channels)
+		return -EINVAL;
+
+	if (mt76_is_mmio(&dev->mt76) && (rxd0 & csum_mask) == csum_mask &&
+	    !(csum_status & (BIT(0) | BIT(2) | BIT(3))))
+		skb->ip_summed = CHECKSUM_UNNECESSARY;
+
+	if (rxd1 & MT_RXD1_NORMAL_FCS_ERR)
+		status->flag |= RX_FLAG_FAILED_FCS_CRC;
+
+	if (rxd1 & MT_RXD1_NORMAL_TKIP_MIC_ERR)
+		status->flag |= RX_FLAG_MMIC_ERROR;
+
+	if (FIELD_GET(MT_RXD1_NORMAL_SEC_MODE, rxd1) != 0 &&
+	    !(rxd1 & (MT_RXD1_NORMAL_CLM | MT_RXD1_NORMAL_CM))) {
+		status->flag |= RX_FLAG_DECRYPTED;
+		status->flag |= RX_FLAG_IV_STRIPPED;
+		status->flag |= RX_FLAG_MMIC_STRIPPED | RX_FLAG_MIC_STRIPPED;
+	}
+
+	remove_pad = FIELD_GET(MT_RXD2_NORMAL_HDR_OFFSET, rxd2);
+
+	if (rxd2 & MT_RXD2_NORMAL_MAX_LEN_ERROR)
+		return -EINVAL;
+
+	rxd += 6;
+	if (rxd1 & MT_RXD1_NORMAL_GROUP_4) {
+		u32 v0 = le32_to_cpu(rxd[0]);
+		u32 v2 = le32_to_cpu(rxd[2]);
+
+		fc = cpu_to_le16(FIELD_GET(MT_RXD6_FRAME_CONTROL, v0));
+		seq_ctrl = FIELD_GET(MT_RXD8_SEQ_CTRL, v2);
+		qos_ctl = FIELD_GET(MT_RXD8_QOS_CTL, v2);
+
+		rxd += 4;
+		if ((u8 *)rxd - skb->data >= skb->len)
+			return -EINVAL;
+	}
+
+	if (rxd1 & MT_RXD1_NORMAL_GROUP_1) {
+		u8 *data = (u8 *)rxd;
+
+		if (status->flag & RX_FLAG_DECRYPTED) {
+			switch (FIELD_GET(MT_RXD1_NORMAL_SEC_MODE, rxd1)) {
+			case MT_CIPHER_AES_CCMP:
+			case MT_CIPHER_CCMP_CCX:
+			case MT_CIPHER_CCMP_256:
+				insert_ccmp_hdr =
+					FIELD_GET(MT_RXD2_NORMAL_FRAG, rxd2);
+				fallthrough;
+			case MT_CIPHER_TKIP:
+			case MT_CIPHER_TKIP_NO_MIC:
+			case MT_CIPHER_GCMP:
+			case MT_CIPHER_GCMP_256:
+				status->iv[0] = data[5];
+				status->iv[1] = data[4];
+				status->iv[2] = data[3];
+				status->iv[3] = data[2];
+				status->iv[4] = data[1];
+				status->iv[5] = data[0];
+				break;
+			default:
+				break;
+			}
+		}
+		rxd += 4;
+		if ((u8 *)rxd - skb->data >= skb->len)
+			return -EINVAL;
+	}
+
+	if (rxd1 & MT_RXD1_NORMAL_GROUP_2) {
+		status->timestamp = le32_to_cpu(rxd[0]);
+		status->flag |= RX_FLAG_MACTIME_START;
+
+		if (!(rxd2 & MT_RXD2_NORMAL_NON_AMPDU)) {
+			status->flag |= RX_FLAG_AMPDU_DETAILS;
+
+			/* all subframes of an A-MPDU have the same timestamp */
+			if (phy->rx_ampdu_ts != status->timestamp) {
+				if (!++phy->ampdu_ref)
+					phy->ampdu_ref++;
+			}
+			phy->rx_ampdu_ts = status->timestamp;
+
+			status->ampdu_ref = phy->ampdu_ref;
+		}
+
+		rxd += 2;
+		if ((u8 *)rxd - skb->data >= skb->len)
+			return -EINVAL;
+	}
+
+	/* RXD Group 3 - P-RXV */
+	if (rxd1 & MT_RXD1_NORMAL_GROUP_3) {
+		u32 v0, v1;
+		int ret;
+
+		rxv = rxd;
+		rxd += 2;
+		if ((u8 *)rxd - skb->data >= skb->len)
+			return -EINVAL;
+
+		v0 = le32_to_cpu(rxv[0]);
+		v1 = le32_to_cpu(rxv[1]);
+
+		if (v0 & MT_PRXV_HT_AD_CODE)
+			status->enc_flags |= RX_ENC_FLAG_LDPC;
+
+		ret = mt76_connac2_mac_fill_rx_rate(&dev->mt76, status, sband,
+						    rxv, &mode);
+		if (ret < 0)
+			return ret;
+
+		if (rxd1 & MT_RXD1_NORMAL_GROUP_5) {
+			rxd += 6;
+			if ((u8 *)rxd - skb->data >= skb->len)
+				return -EINVAL;
+
+			rxv = rxd;
+			/* Monitor mode would use RCPI described in GROUP 5
+			 * instead.
+			 */
+			v1 = le32_to_cpu(rxv[0]);
+
+			rxd += 12;
+			if ((u8 *)rxd - skb->data >= skb->len)
+				return -EINVAL;
+		}
+
+		status->chains = mphy->antenna_mask;
+		status->chain_signal[0] = to_rssi(MT_PRXV_RCPI0, v1);
+		status->chain_signal[1] = to_rssi(MT_PRXV_RCPI1, v1);
+		status->chain_signal[2] = to_rssi(MT_PRXV_RCPI2, v1);
+		status->chain_signal[3] = to_rssi(MT_PRXV_RCPI3, v1);
+		status->signal = -128;
+		for (i = 0; i < hweight8(mphy->antenna_mask); i++) {
+			if (!(status->chains & BIT(i)) ||
+			    status->chain_signal[i] >= 0)
+				continue;
+
+			status->signal = max(status->signal,
+					     status->chain_signal[i]);
+		}
+	}
+
+	amsdu_info = FIELD_GET(MT_RXD4_NORMAL_PAYLOAD_FORMAT, rxd4);
+	status->amsdu = !!amsdu_info;
+	if (status->amsdu) {
+		status->first_amsdu = amsdu_info == MT_RXD4_FIRST_AMSDU_FRAME;
+		status->last_amsdu = amsdu_info == MT_RXD4_LAST_AMSDU_FRAME;
+	}
+
+	hdr_gap = (u8 *)rxd - skb->data + 2 * remove_pad;
+	if (hdr_trans && ieee80211_has_morefrags(fc)) {
+		struct ieee80211_vif *vif;
+		int err;
+
+		if (!msta || !msta->vif)
+			return -EINVAL;
+
+		vif = container_of((void *)msta->vif, struct ieee80211_vif,
+				   drv_priv);
+		err = mt76_connac2_reverse_frag0_hdr_trans(vif, skb, hdr_gap);
+		if (err)
+			return err;
+
+		hdr_trans = false;
+	} else {
+		skb_pull(skb, hdr_gap);
+		if (!hdr_trans && status->amsdu) {
+			memmove(skb->data + 2, skb->data,
+				ieee80211_get_hdrlen_from_skb(skb));
+			skb_pull(skb, 2);
+		}
+	}
+
+	if (!hdr_trans) {
+		struct ieee80211_hdr *hdr;
+
+		if (insert_ccmp_hdr) {
+			u8 key_id = FIELD_GET(MT_RXD1_NORMAL_KEY_ID, rxd1);
+
+			mt76_insert_ccmp_hdr(skb, key_id);
+		}
+
+		hdr = mt76_skb_get_hdr(skb);
+		fc = hdr->frame_control;
+		if (ieee80211_is_data_qos(fc)) {
+			seq_ctrl = le16_to_cpu(hdr->seq_ctrl);
+			qos_ctl = *ieee80211_get_qos_ctl(hdr);
+		}
+	} else {
+		status->flag |= RX_FLAG_8023;
+	}
+
+	mt792x_mac_assoc_rssi(dev, skb);
+
+	if (rxv && mode >= MT_PHY_TYPE_HE_SU && !(status->flag & RX_FLAG_8023))
+		mt76_connac2_mac_decode_he_radiotap(&dev->mt76, skb, rxv, mode);
+
+	if (!status->wcid || !ieee80211_is_data_qos(fc))
+		return 0;
+
+	status->aggr = unicast && !ieee80211_is_qos_nullfunc(fc);
+	status->seqno = IEEE80211_SEQ_TO_SN(seq_ctrl);
+	status->qos_ctl = qos_ctl;
+
+	return 0;
+}
+
+void mt7921_mac_add_txs(struct mt792x_dev *dev, void *data)
+{
+	struct mt792x_sta *msta = NULL;
+	struct mt76_wcid *wcid;
+	__le32 *txs_data = data;
+	u16 wcidx;
+	u8 pid;
+
+	if (le32_get_bits(txs_data[0], MT_TXS0_TXS_FORMAT) > 1)
+		return;
+
+	wcidx = le32_get_bits(txs_data[2], MT_TXS2_WCID);
+	pid = le32_get_bits(txs_data[3], MT_TXS3_PID);
+
+	if (pid < MT_PACKET_ID_FIRST)
+		return;
+
+	if (wcidx >= MT792x_WTBL_SIZE)
+		return;
+
+	rcu_read_lock();
+
+	wcid = rcu_dereference(dev->mt76.wcid[wcidx]);
+	if (!wcid)
+		goto out;
+
+	msta = container_of(wcid, struct mt792x_sta, wcid);
+
+	mt76_connac2_mac_add_txs_skb(&dev->mt76, wcid, pid, txs_data);
+	if (!wcid->sta)
+		goto out;
+
+	spin_lock_bh(&dev->mt76.sta_poll_lock);
+	if (list_empty(&msta->wcid.poll_list))
+		list_add_tail(&msta->wcid.poll_list, &dev->mt76.sta_poll_list);
+	spin_unlock_bh(&dev->mt76.sta_poll_lock);
+
+out:
+	rcu_read_unlock();
+}
+
+static void mt7921_mac_tx_free(struct mt792x_dev *dev, void *data, int len)
+{
+	struct mt76_connac_tx_free *free = data;
+	__le32 *tx_info = (__le32 *)(data + sizeof(*free));
+	struct mt76_dev *mdev = &dev->mt76;
+	struct mt76_txwi_cache *txwi;
+	struct ieee80211_sta *sta = NULL;
+	struct mt76_wcid *wcid = NULL;
+	struct sk_buff *skb, *tmp;
+	void *end = data + len;
+	LIST_HEAD(free_list);
+	bool wake = false;
+	u8 i, count;
+
+	/* clean DMA queues and unmap buffers first */
+	mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[MT_TXQ_PSD], false);
+	mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[MT_TXQ_BE], false);
+
+	count = le16_get_bits(free->ctrl, MT_TX_FREE_MSDU_CNT);
+	if (WARN_ON_ONCE((void *)&tx_info[count] > end))
+		return;
+
+	for (i = 0; i < count; i++) {
+		u32 msdu, info = le32_to_cpu(tx_info[i]);
+		u8 stat;
+
+		/* 1'b1: new wcid pair.
+		 * 1'b0: msdu_id with the same 'wcid pair' as above.
+		 */
+		if (info & MT_TX_FREE_PAIR) {
+			struct mt792x_sta *msta;
+			u16 idx;
+
+			count++;
+			idx = FIELD_GET(MT_TX_FREE_WLAN_ID, info);
+			wcid = rcu_dereference(dev->mt76.wcid[idx]);
+			sta = wcid_to_sta(wcid);
+			if (!sta)
+				continue;
+
+			msta = container_of(wcid, struct mt792x_sta, wcid);
+			spin_lock_bh(&mdev->sta_poll_lock);
+			if (list_empty(&msta->wcid.poll_list))
+				list_add_tail(&msta->wcid.poll_list,
+					      &mdev->sta_poll_list);
+			spin_unlock_bh(&mdev->sta_poll_lock);
+			continue;
+		}
+
+		msdu = FIELD_GET(MT_TX_FREE_MSDU_ID, info);
+		stat = FIELD_GET(MT_TX_FREE_STATUS, info);
+
+		if (wcid) {
+			wcid->stats.tx_retries +=
+				FIELD_GET(MT_TX_FREE_COUNT, info) - 1;
+			wcid->stats.tx_failed += !!stat;
+		}
+
+		txwi = mt76_token_release(mdev, msdu, &wake);
+		if (!txwi)
+			continue;
+
+		mt76_connac2_txwi_free(mdev, txwi, sta, &free_list);
+	}
+
+	if (wake)
+		mt76_set_tx_blocked(&dev->mt76, false);
+
+	list_for_each_entry_safe(skb, tmp, &free_list, list) {
+		skb_list_del_init(skb);
+		napi_consume_skb(skb, 1);
+	}
+
+	rcu_read_lock();
+	mt7921_mac_sta_poll(dev);
+	rcu_read_unlock();
+
+	mt76_worker_schedule(&dev->mt76.tx_worker);
+}
+
+bool mt7921_rx_check(struct mt76_dev *mdev, void *data, int len)
+{
+	struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
+	__le32 *rxd = (__le32 *)data;
+	__le32 *end = (__le32 *)&rxd[len / 4];
+	enum rx_pkt_type type;
+
+	type = le32_get_bits(rxd[0], MT_RXD0_PKT_TYPE);
+
+	switch (type) {
+	case PKT_TYPE_TXRX_NOTIFY:
+		/* PKT_TYPE_TXRX_NOTIFY can be received only by mmio devices */
+		mt7921_mac_tx_free(dev, data, len); /* mmio */
+		return false;
+	case PKT_TYPE_TXS:
+		for (rxd += 2; rxd + 8 <= end; rxd += 8)
+			mt7921_mac_add_txs(dev, rxd);
+		return false;
+	default:
+		return true;
+	}
+}
+EXPORT_SYMBOL_GPL(mt7921_rx_check);
+
+void mt7921_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q,
+			 struct sk_buff *skb, u32 *info)
+{
+	struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
+	__le32 *rxd = (__le32 *)skb->data;
+	__le32 *end = (__le32 *)&skb->data[skb->len];
+	enum rx_pkt_type type;
+	u16 flag;
+
+	type = le32_get_bits(rxd[0], MT_RXD0_PKT_TYPE);
+	flag = le32_get_bits(rxd[0], MT_RXD0_PKT_FLAG);
+
+	if (type == PKT_TYPE_RX_EVENT && flag == 0x1)
+		type = PKT_TYPE_NORMAL_MCU;
+
+	switch (type) {
+	case PKT_TYPE_TXRX_NOTIFY:
+		/* PKT_TYPE_TXRX_NOTIFY can be received only by mmio devices */
+		mt7921_mac_tx_free(dev, skb->data, skb->len);
+		napi_consume_skb(skb, 1);
+		break;
+	case PKT_TYPE_RX_EVENT:
+		mt7921_mcu_rx_event(dev, skb);
+		break;
+	case PKT_TYPE_TXS:
+		for (rxd += 2; rxd + 8 <= end; rxd += 8)
+			mt7921_mac_add_txs(dev, rxd);
+		dev_kfree_skb(skb);
+		break;
+	case PKT_TYPE_NORMAL_MCU:
+	case PKT_TYPE_NORMAL:
+		if (!mt7921_mac_fill_rx(dev, skb)) {
+			mt76_rx(&dev->mt76, q, skb);
+			return;
+		}
+		fallthrough;
+	default:
+		dev_kfree_skb(skb);
+		break;
+	}
+}
+EXPORT_SYMBOL_GPL(mt7921_queue_rx_skb);
+
+static void
+mt7921_vif_connect_iter(void *priv, u8 *mac,
+			struct ieee80211_vif *vif)
+{
+	struct mt792x_vif *mvif = (struct mt792x_vif *)vif->drv_priv;
+	struct mt792x_dev *dev = mvif->phy->dev;
+	struct ieee80211_hw *hw = mt76_hw(dev);
+
+	if (vif->type == NL80211_IFTYPE_STATION)
+		ieee80211_disconnect(vif, true);
+
+	mt76_connac_mcu_uni_add_dev(&dev->mphy, vif, &mvif->sta.wcid, true);
+	mt7921_mcu_set_tx(dev, vif);
+
+	if (vif->type == NL80211_IFTYPE_AP) {
+		mt76_connac_mcu_uni_add_bss(dev->phy.mt76, vif, &mvif->sta.wcid,
+					    true, NULL);
+		mt7921_mcu_sta_update(dev, NULL, vif, true,
+				      MT76_STA_INFO_STATE_NONE);
+		mt7921_mcu_uni_add_beacon_offload(dev, hw, vif, true);
+	}
+}
+
+/* system error recovery */
+void mt7921_mac_reset_work(struct work_struct *work)
+{
+	struct mt792x_dev *dev = container_of(work, struct mt792x_dev,
+					      reset_work);
+	struct ieee80211_hw *hw = mt76_hw(dev);
+	struct mt76_connac_pm *pm = &dev->pm;
+	int i, ret;
+
+	dev_dbg(dev->mt76.dev, "chip reset\n");
+	dev->hw_full_reset = true;
+	ieee80211_stop_queues(hw);
+
+	cancel_delayed_work_sync(&dev->mphy.mac_work);
+	cancel_delayed_work_sync(&pm->ps_work);
+	cancel_work_sync(&pm->wake_work);
+
+	for (i = 0; i < 10; i++) {
+		mutex_lock(&dev->mt76.mutex);
+		ret = mt792x_dev_reset(dev);
+		mutex_unlock(&dev->mt76.mutex);
+
+		if (!ret)
+			break;
+	}
+
+	if (i == 10)
+		dev_err(dev->mt76.dev, "chip reset failed\n");
+
+	if (test_and_clear_bit(MT76_HW_SCANNING, &dev->mphy.state)) {
+		struct cfg80211_scan_info info = {
+			.aborted = true,
+		};
+
+		ieee80211_scan_completed(dev->mphy.hw, &info);
+	}
+
+	dev->hw_full_reset = false;
+	pm->suspended = false;
+	ieee80211_wake_queues(hw);
+	ieee80211_iterate_active_interfaces(hw,
+					    IEEE80211_IFACE_ITER_RESUME_ALL,
+					    mt7921_vif_connect_iter, NULL);
+	mt76_connac_power_save_sched(&dev->mt76.phy, pm);
+}
+
+void mt7921_coredump_work(struct work_struct *work)
+{
+	struct mt792x_dev *dev;
+	char *dump, *data;
+
+	dev = (struct mt792x_dev *)container_of(work, struct mt792x_dev,
+						coredump.work.work);
+
+	if (time_is_after_jiffies(dev->coredump.last_activity +
+				  4 * MT76_CONNAC_COREDUMP_TIMEOUT)) {
+		queue_delayed_work(dev->mt76.wq, &dev->coredump.work,
+				   MT76_CONNAC_COREDUMP_TIMEOUT);
+		return;
+	}
+
+	dump = vzalloc(MT76_CONNAC_COREDUMP_SZ);
+	data = dump;
+
+	while (true) {
+		struct sk_buff *skb;
+
+		spin_lock_bh(&dev->mt76.lock);
+		skb = __skb_dequeue(&dev->coredump.msg_list);
+		spin_unlock_bh(&dev->mt76.lock);
+
+		if (!skb)
+			break;
+
+		skb_pull(skb, sizeof(struct mt76_connac2_mcu_rxd));
+		if (!dump || data + skb->len - dump > MT76_CONNAC_COREDUMP_SZ) {
+			dev_kfree_skb(skb);
+			continue;
+		}
+
+		memcpy(data, skb->data, skb->len);
+		data += skb->len;
+
+		dev_kfree_skb(skb);
+	}
+
+	if (dump)
+		dev_coredumpv(dev->mt76.dev, dump, MT76_CONNAC_COREDUMP_SZ,
+			      GFP_KERNEL);
+
+	mt792x_reset(&dev->mt76);
+}
+
+/* usb_sdio */
+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)
+{
+	__le32 *txwi = (__le32 *)(skb->data - MT_SDIO_TXD_SIZE);
+
+	memset(txwi, 0, MT_SDIO_TXD_SIZE);
+	mt76_connac2_mac_write_txwi(&dev->mt76, txwi, skb, wcid, key, pid, qid, 0);
+	skb_push(skb, MT_SDIO_TXD_SIZE);
+}
+
+int 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)
+{
+	struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_info->skb);
+	struct ieee80211_key_conf *key = info->control.hw_key;
+	struct sk_buff *skb = tx_info->skb;
+	int err, pad, pktid, type;
+
+	if (unlikely(tx_info->skb->len <= ETH_HLEN))
+		return -EINVAL;
+
+	err = skb_cow_head(skb, MT_SDIO_TXD_SIZE + MT_SDIO_HDR_SIZE);
+	if (err)
+		return err;
+
+	if (!wcid)
+		wcid = &dev->mt76.global_wcid;
+
+	if (sta) {
+		struct mt792x_sta *msta = (struct mt792x_sta *)sta->drv_priv;
+
+		if (time_after(jiffies, msta->last_txs + HZ / 4)) {
+			info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
+			msta->last_txs = jiffies;
+		}
+	}
+
+	pktid = mt76_tx_status_skb_add(&dev->mt76, wcid, skb);
+	mt7921_usb_sdio_write_txwi(dev, wcid, qid, sta, key, pktid, skb);
+
+	type = mt76_is_sdio(mdev) ? MT7921_SDIO_DATA : 0;
+	mt7921_skb_add_usb_sdio_hdr(dev, skb, type);
+	pad = round_up(skb->len, 4) - skb->len;
+	if (mt76_is_usb(mdev))
+		pad += 4;
+
+	err = mt76_skb_adjust_pad(skb, pad);
+	if (err)
+		/* Release pktid in case of error. */
+		idr_remove(&wcid->pktid, pktid);
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(mt7921_usb_sdio_tx_prepare_skb);
+
+void mt7921_usb_sdio_tx_complete_skb(struct mt76_dev *mdev,
+				     struct mt76_queue_entry *e)
+{
+	__le32 *txwi = (__le32 *)(e->skb->data + MT_SDIO_HDR_SIZE);
+	unsigned int headroom = MT_SDIO_TXD_SIZE + MT_SDIO_HDR_SIZE;
+	struct ieee80211_sta *sta;
+	struct mt76_wcid *wcid;
+	u16 idx;
+
+	idx = le32_get_bits(txwi[1], MT_TXD1_WLAN_IDX);
+	wcid = rcu_dereference(mdev->wcid[idx]);
+	sta = wcid_to_sta(wcid);
+
+	if (sta && likely(e->skb->protocol != cpu_to_be16(ETH_P_PAE)))
+		mt76_connac2_tx_check_aggr(sta, txwi);
+
+	skb_pull(e->skb, headroom);
+	mt76_tx_complete_skb(mdev, e->wcid, e->skb);
+}
+EXPORT_SYMBOL_GPL(mt7921_usb_sdio_tx_complete_skb);
+
+bool mt7921_usb_sdio_tx_status_data(struct mt76_dev *mdev, u8 *update)
+{
+	struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
+
+	mt792x_mutex_acquire(dev);
+	mt7921_mac_sta_poll(dev);
+	mt792x_mutex_release(dev);
+
+	return false;
+}
+EXPORT_SYMBOL_GPL(mt7921_usb_sdio_tx_status_data);
+
+#if IS_ENABLED(CONFIG_IPV6)
+void mt7921_set_ipv6_ns_work(struct work_struct *work)
+{
+	struct mt792x_dev *dev = container_of(work, struct mt792x_dev,
+					      ipv6_ns_work);
+	struct sk_buff *skb;
+	int ret = 0;
+
+	do {
+		skb = skb_dequeue(&dev->ipv6_ns_list);
+
+		if (!skb)
+			break;
+
+		mt792x_mutex_acquire(dev);
+		ret = mt76_mcu_skb_send_msg(&dev->mt76, skb,
+					    MCU_UNI_CMD(OFFLOAD), true);
+		mt792x_mutex_release(dev);
+
+	} while (!ret);
+
+	if (ret)
+		skb_queue_purge(&dev->ipv6_ns_list);
+}
+#endif