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[PATCH 07/17] wifi: mt76: mt7925: add mac.c

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(Patches split into one patch per file for easier review, but the final
commit will be one big patch. See the cover letter for more info.)

Co-developed-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
Signed-off-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
Signed-off-by: Deren Wu <deren.wu@xxxxxxxxxxxx>
---
 .../net/wireless/mediatek/mt76/mt7925/mac.c   | 1452 +++++++++++++++++
 1 file changed, 1452 insertions(+)
 create mode 100644 drivers/net/wireless/mediatek/mt76/mt7925/mac.c

diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/mac.c b/drivers/net/wireless/mediatek/mt76/mt7925/mac.c
new file mode 100644
index 000000000000..2b27611c7f4b
--- /dev/null
+++ b/drivers/net/wireless/mediatek/mt76/mt7925/mac.c
@@ -0,0 +1,1452 @@
+// SPDX-License-Identifier: ISC
+/* Copyright (C) 2023 MediaTek Inc. */
+
+#include <linux/devcoredump.h>
+#include <linux/etherdevice.h>
+#include <linux/timekeeping.h>
+#include "mt7925.h"
+#include "../dma.h"
+#include "mac.h"
+#include "mcu.h"
+
+bool mt7925_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 void mt7925_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;
+
+		if (list_empty(&sta_poll_list))
+			break;
+		msta = list_first_entry(&sta_poll_list,
+					struct mt792x_sta, wcid.poll_list);
+		spin_lock_bh(&dev->mt76.sta_poll_lock);
+		list_del_init(&msta->wcid.poll_list);
+		spin_unlock_bh(&dev->mt76.sta_poll_lock);
+
+		idx = msta->wcid.idx;
+		addr = mt7925_mac_wtbl_lmac_addr(dev, 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) {
+			mt7925_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;
+
+		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;
+		}
+
+		addr = mt7925_mac_wtbl_lmac_addr(dev, idx, 6);
+		val = mt76_rr(dev, addr);
+		if (rate->flags & RATE_INFO_FLAGS_EHT_MCS) {
+			addr = mt7925_mac_wtbl_lmac_addr(dev, idx, 5);
+			val = mt76_rr(dev, addr);
+			rate->eht_gi = FIELD_GET(GENMASK(25, 24), val);
+		} else 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 = mt7925_mac_wtbl_lmac_addr(dev, idx, 34);
+		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);
+	}
+}
+
+void mt7925_mac_set_fixed_rate_table(struct mt792x_dev *dev,
+				     u8 tbl_idx, u16 rate_idx)
+{
+	u32 ctrl = MT_WTBL_ITCR_WR | MT_WTBL_ITCR_EXEC | tbl_idx;
+
+	mt76_wr(dev, MT_WTBL_ITDR0, rate_idx);
+	/* use wtbl spe idx */
+	mt76_wr(dev, MT_WTBL_ITDR1, MT_WTBL_SPE_IDX_SEL);
+	mt76_wr(dev, MT_WTBL_ITCR, ctrl);
+}
+
+/* The HW does not translate the mac header to 802.3 for mesh point */
+static int mt7925_reverse_frag0_hdr_trans(struct sk_buff *skb, u16 hdr_gap)
+{
+	struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb;
+	struct ethhdr *eth_hdr = (struct ethhdr *)(skb->data + hdr_gap);
+	struct mt792x_sta *msta = (struct mt792x_sta *)status->wcid;
+	__le32 *rxd = (__le32 *)skb->data;
+	struct ieee80211_sta *sta;
+	struct ieee80211_vif *vif;
+	struct ieee80211_hdr hdr;
+	u16 frame_control;
+
+	if (le32_get_bits(rxd[3], MT_RXD3_NORMAL_ADDR_TYPE) !=
+	    MT_RXD3_NORMAL_U2M)
+		return -EINVAL;
+
+	if (!(le32_to_cpu(rxd[1]) & MT_RXD1_NORMAL_GROUP_4))
+		return -EINVAL;
+
+	if (!msta || !msta->vif)
+		return -EINVAL;
+
+	sta = container_of((void *)msta, struct ieee80211_sta, drv_priv);
+	vif = container_of((void *)msta->vif, struct ieee80211_vif, drv_priv);
+
+	/* store the info from RXD and ethhdr to avoid being overridden */
+	frame_control = le32_get_bits(rxd[8], MT_RXD8_FRAME_CONTROL);
+	hdr.frame_control = cpu_to_le16(frame_control);
+	hdr.seq_ctrl = cpu_to_le16(le32_get_bits(rxd[10], MT_RXD10_SEQ_CTRL));
+	hdr.duration_id = 0;
+
+	ether_addr_copy(hdr.addr1, vif->addr);
+	ether_addr_copy(hdr.addr2, sta->addr);
+	switch (frame_control & (IEEE80211_FCTL_TODS |
+				 IEEE80211_FCTL_FROMDS)) {
+	case 0:
+		ether_addr_copy(hdr.addr3, vif->bss_conf.bssid);
+		break;
+	case IEEE80211_FCTL_FROMDS:
+		ether_addr_copy(hdr.addr3, eth_hdr->h_source);
+		break;
+	case IEEE80211_FCTL_TODS:
+		ether_addr_copy(hdr.addr3, eth_hdr->h_dest);
+		break;
+	case IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS:
+		ether_addr_copy(hdr.addr3, eth_hdr->h_dest);
+		ether_addr_copy(hdr.addr4, eth_hdr->h_source);
+		break;
+	default:
+		break;
+	}
+
+	skb_pull(skb, hdr_gap + sizeof(struct ethhdr) - 2);
+	if (eth_hdr->h_proto == cpu_to_be16(ETH_P_AARP) ||
+	    eth_hdr->h_proto == cpu_to_be16(ETH_P_IPX))
+		ether_addr_copy(skb_push(skb, ETH_ALEN), bridge_tunnel_header);
+	else if (be16_to_cpu(eth_hdr->h_proto) >= ETH_P_802_3_MIN)
+		ether_addr_copy(skb_push(skb, ETH_ALEN), rfc1042_header);
+	else
+		skb_pull(skb, 2);
+
+	if (ieee80211_has_order(hdr.frame_control))
+		memcpy(skb_push(skb, IEEE80211_HT_CTL_LEN), &rxd[11],
+		       IEEE80211_HT_CTL_LEN);
+	if (ieee80211_is_data_qos(hdr.frame_control)) {
+		__le16 qos_ctrl;
+
+		qos_ctrl = cpu_to_le16(le32_get_bits(rxd[10], MT_RXD10_QOS_CTL));
+		memcpy(skb_push(skb, IEEE80211_QOS_CTL_LEN), &qos_ctrl,
+		       IEEE80211_QOS_CTL_LEN);
+	}
+
+	if (ieee80211_has_a4(hdr.frame_control))
+		memcpy(skb_push(skb, sizeof(hdr)), &hdr, sizeof(hdr));
+	else
+		memcpy(skb_push(skb, sizeof(hdr) - 6), &hdr, sizeof(hdr) - 6);
+
+	return 0;
+}
+
+static int
+mt7925_mac_fill_rx_rate(struct mt792x_dev *dev,
+			struct mt76_rx_status *status,
+			struct ieee80211_supported_band *sband,
+			__le32 *rxv, u8 *mode)
+{
+	u32 v0, v2;
+	u8 stbc, gi, bw, dcm, nss;
+	int i, idx;
+	bool cck = false;
+
+	v0 = le32_to_cpu(rxv[0]);
+	v2 = le32_to_cpu(rxv[2]);
+
+	idx = FIELD_GET(MT_PRXV_TX_RATE, v0);
+	i = idx;
+	nss = FIELD_GET(MT_PRXV_NSTS, v0) + 1;
+
+	stbc = FIELD_GET(MT_PRXV_HT_STBC, v2);
+	gi = FIELD_GET(MT_PRXV_HT_SHORT_GI, v2);
+	*mode = FIELD_GET(MT_PRXV_TX_MODE, v2);
+	dcm = FIELD_GET(MT_PRXV_DCM, v2);
+	bw = FIELD_GET(MT_PRXV_FRAME_MODE, v2);
+
+	switch (*mode) {
+	case MT_PHY_TYPE_CCK:
+		cck = true;
+		fallthrough;
+	case MT_PHY_TYPE_OFDM:
+		i = mt76_get_rate(&dev->mt76, sband, i, cck);
+		break;
+	case MT_PHY_TYPE_HT_GF:
+	case MT_PHY_TYPE_HT:
+		status->encoding = RX_ENC_HT;
+		if (gi)
+			status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
+		if (i > 31)
+			return -EINVAL;
+		break;
+	case MT_PHY_TYPE_VHT:
+		status->nss = nss;
+		status->encoding = RX_ENC_VHT;
+		if (gi)
+			status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
+		if (i > 11)
+			return -EINVAL;
+		break;
+	case MT_PHY_TYPE_HE_MU:
+	case MT_PHY_TYPE_HE_SU:
+	case MT_PHY_TYPE_HE_EXT_SU:
+	case MT_PHY_TYPE_HE_TB:
+		status->nss = nss;
+		status->encoding = RX_ENC_HE;
+		i &= GENMASK(3, 0);
+
+		if (gi <= NL80211_RATE_INFO_HE_GI_3_2)
+			status->he_gi = gi;
+
+		status->he_dcm = dcm;
+		break;
+	case MT_PHY_TYPE_EHT_SU:
+	case MT_PHY_TYPE_EHT_TRIG:
+	case MT_PHY_TYPE_EHT_MU:
+		status->nss = nss;
+		status->encoding = RX_ENC_EHT;
+		i &= GENMASK(3, 0);
+
+		if (gi <= NL80211_RATE_INFO_EHT_GI_3_2)
+			status->eht.gi = gi;
+		break;
+	default:
+		return -EINVAL;
+	}
+	status->rate_idx = i;
+
+	switch (bw) {
+	case IEEE80211_STA_RX_BW_20:
+		break;
+	case IEEE80211_STA_RX_BW_40:
+		if (*mode & MT_PHY_TYPE_HE_EXT_SU &&
+		    (idx & MT_PRXV_TX_ER_SU_106T)) {
+			status->bw = RATE_INFO_BW_HE_RU;
+			status->he_ru =
+				NL80211_RATE_INFO_HE_RU_ALLOC_106;
+		} else {
+			status->bw = RATE_INFO_BW_40;
+		}
+		break;
+	case IEEE80211_STA_RX_BW_80:
+		status->bw = RATE_INFO_BW_80;
+		break;
+	case IEEE80211_STA_RX_BW_160:
+		status->bw = RATE_INFO_BW_160;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	status->enc_flags |= RX_ENC_FLAG_STBC_MASK * stbc;
+	if (*mode < MT_PHY_TYPE_HE_SU && gi)
+		status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
+
+	return 0;
+}
+
+static int
+mt7925_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;
+	u8 mode = 0; /* , band_idx; */
+	u16 seq_ctrl = 0;
+	__le16 fc = 0;
+	int idx;
+
+	memset(status, 0, sizeof(*status));
+
+	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 (rxd3 & MT_RXD3_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_RXD2_NORMAL_SEC_MODE, rxd2) != 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 += 8;
+	if (rxd1 & MT_RXD1_NORMAL_GROUP_4) {
+		u32 v0 = le32_to_cpu(rxd[0]);
+		u32 v2 = le32_to_cpu(rxd[2]);
+
+		/* TODO: need to map rxd address */
+		fc = cpu_to_le16(FIELD_GET(MT_RXD8_FRAME_CONTROL, v0));
+		seq_ctrl = FIELD_GET(MT_RXD10_SEQ_CTRL, v2);
+		qos_ctl = FIELD_GET(MT_RXD10_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_RXD2_NORMAL_SEC_MODE, rxd2)) {
+			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 += 4;
+		if ((u8 *)rxd - skb->data >= skb->len)
+			return -EINVAL;
+	}
+
+	/* RXD Group 3 - P-RXV */
+	if (rxd1 & MT_RXD1_NORMAL_GROUP_3) {
+		u32 v3;
+		int ret;
+
+		rxv = rxd;
+		rxd += 4;
+		if ((u8 *)rxd - skb->data >= skb->len)
+			return -EINVAL;
+
+		v3 = le32_to_cpu(rxv[3]);
+
+		status->chains = mphy->antenna_mask;
+		status->chain_signal[0] = to_rssi(MT_PRXV_RCPI0, v3);
+		status->chain_signal[1] = to_rssi(MT_PRXV_RCPI1, v3);
+		status->chain_signal[2] = to_rssi(MT_PRXV_RCPI2, v3);
+		status->chain_signal[3] = to_rssi(MT_PRXV_RCPI3, v3);
+
+		/* RXD Group 5 - C-RXV */
+		if (rxd1 & MT_RXD1_NORMAL_GROUP_5) {
+			rxd += 24;
+			if ((u8 *)rxd - skb->data >= skb->len)
+				return -EINVAL;
+		}
+
+		ret = mt7925_mac_fill_rx_rate(dev, status, sband, rxv, &mode);
+		if (ret < 0)
+			return ret;
+	}
+
+	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)) {
+		if (mt7925_reverse_frag0_hdr_trans(skb, hdr_gap))
+			return -EINVAL;
+		hdr_trans = false;
+	} else {
+		int pad_start = 0;
+
+		skb_pull(skb, hdr_gap);
+		if (!hdr_trans && status->amsdu) {
+			pad_start = ieee80211_get_hdrlen_from_skb(skb);
+		} else if (hdr_trans && (rxd2 & MT_RXD2_NORMAL_HDR_TRANS_ERROR)) {
+			/* When header translation failure is indicated,
+			 * the hardware will insert an extra 2-byte field
+			 * containing the data length after the protocol
+			 * type field.
+			 */
+			pad_start = 12;
+			if (get_unaligned_be16(skb->data + pad_start) == ETH_P_8021Q)
+				pad_start += 4;
+			else
+				pad_start = 0;
+		}
+
+		if (pad_start) {
+			memmove(skb->data + 2, skb->data, pad_start);
+			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_connac3_mac_decode_he_radiotap(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;
+}
+
+static void
+mt7925_mac_write_txwi_8023(__le32 *txwi, struct sk_buff *skb,
+			   struct mt76_wcid *wcid)
+{
+	u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
+	u8 fc_type, fc_stype;
+	u16 ethertype;
+	bool wmm = false;
+	u32 val;
+
+	if (wcid->sta) {
+		struct ieee80211_sta *sta;
+
+		sta = container_of((void *)wcid, struct ieee80211_sta, drv_priv);
+		wmm = sta->wme;
+	}
+
+	val = FIELD_PREP(MT_TXD1_HDR_FORMAT, MT_HDR_FORMAT_802_3) |
+	      FIELD_PREP(MT_TXD1_TID, tid);
+
+	ethertype = get_unaligned_be16(&skb->data[12]);
+	if (ethertype >= ETH_P_802_3_MIN)
+		val |= MT_TXD1_ETH_802_3;
+
+	txwi[1] |= cpu_to_le32(val);
+
+	fc_type = IEEE80211_FTYPE_DATA >> 2;
+	fc_stype = wmm ? IEEE80211_STYPE_QOS_DATA >> 4 : 0;
+
+	val = FIELD_PREP(MT_TXD2_FRAME_TYPE, fc_type) |
+	      FIELD_PREP(MT_TXD2_SUB_TYPE, fc_stype);
+
+	txwi[2] |= cpu_to_le32(val);
+}
+
+static void
+mt7925_mac_write_txwi_80211(struct mt76_dev *dev, __le32 *txwi,
+			    struct sk_buff *skb,
+			    struct ieee80211_key_conf *key)
+{
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+	struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	bool multicast = is_multicast_ether_addr(hdr->addr1);
+	u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
+	__le16 fc = hdr->frame_control;
+	u8 fc_type, fc_stype;
+	u32 val;
+
+	if (ieee80211_is_action(fc) &&
+	    mgmt->u.action.category == WLAN_CATEGORY_BACK &&
+	    mgmt->u.action.u.addba_req.action_code == WLAN_ACTION_ADDBA_REQ)
+		tid = MT_TX_ADDBA;
+	else if (ieee80211_is_mgmt(hdr->frame_control))
+		tid = MT_TX_NORMAL;
+
+	val = FIELD_PREP(MT_TXD1_HDR_FORMAT, MT_HDR_FORMAT_802_11) |
+	      FIELD_PREP(MT_TXD1_HDR_INFO,
+			 ieee80211_get_hdrlen_from_skb(skb) / 2) |
+	      FIELD_PREP(MT_TXD1_TID, tid);
+
+	if (!ieee80211_is_data(fc) || multicast ||
+	    info->flags & IEEE80211_TX_CTL_USE_MINRATE)
+		val |= MT_TXD1_FIXED_RATE;
+
+	if (key && multicast && ieee80211_is_robust_mgmt_frame(skb) &&
+	    key->cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
+		val |= MT_TXD1_BIP;
+		txwi[3] &= ~cpu_to_le32(MT_TXD3_PROTECT_FRAME);
+	}
+
+	txwi[1] |= cpu_to_le32(val);
+
+	fc_type = (le16_to_cpu(fc) & IEEE80211_FCTL_FTYPE) >> 2;
+	fc_stype = (le16_to_cpu(fc) & IEEE80211_FCTL_STYPE) >> 4;
+
+	val = FIELD_PREP(MT_TXD2_FRAME_TYPE, fc_type) |
+	      FIELD_PREP(MT_TXD2_SUB_TYPE, fc_stype);
+
+	txwi[2] |= cpu_to_le32(val);
+
+	txwi[3] |= cpu_to_le32(FIELD_PREP(MT_TXD3_BCM, multicast));
+	if (ieee80211_is_beacon(fc))
+		txwi[3] |= cpu_to_le32(MT_TXD3_REM_TX_COUNT);
+
+	if (info->flags & IEEE80211_TX_CTL_INJECTED) {
+		u16 seqno = le16_to_cpu(hdr->seq_ctrl);
+
+		if (ieee80211_is_back_req(hdr->frame_control)) {
+			struct ieee80211_bar *bar;
+
+			bar = (struct ieee80211_bar *)skb->data;
+			seqno = le16_to_cpu(bar->start_seq_num);
+		}
+
+		val = MT_TXD3_SN_VALID |
+		      FIELD_PREP(MT_TXD3_SEQ, IEEE80211_SEQ_TO_SN(seqno));
+		txwi[3] |= cpu_to_le32(val);
+		txwi[3] &= ~cpu_to_le32(MT_TXD3_HW_AMSDU);
+	}
+}
+
+void
+mt7925_mac_write_txwi(struct mt76_dev *dev, __le32 *txwi,
+		      struct sk_buff *skb, struct mt76_wcid *wcid,
+		      struct ieee80211_key_conf *key, int pid,
+		      enum mt76_txq_id qid, u32 changed)
+{
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	struct ieee80211_vif *vif = info->control.vif;
+	u8 p_fmt, q_idx, omac_idx = 0, wmm_idx = 0, band_idx = 0;
+	u32 val, sz_txd = mt76_is_mmio(dev) ? MT_TXD_SIZE : MT_SDIO_TXD_SIZE;
+	bool is_8023 = info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP;
+	struct mt76_vif *mvif;
+	bool beacon = !!(changed & (BSS_CHANGED_BEACON |
+				    BSS_CHANGED_BEACON_ENABLED));
+	bool inband_disc = !!(changed & (BSS_CHANGED_UNSOL_BCAST_PROBE_RESP |
+					 BSS_CHANGED_FILS_DISCOVERY));
+
+	mvif = vif ? (struct mt76_vif *)vif->drv_priv : NULL;
+	if (mvif) {
+		omac_idx = mvif->omac_idx;
+		wmm_idx = mvif->wmm_idx;
+		band_idx = mvif->band_idx;
+	}
+
+	if (inband_disc) {
+		p_fmt = MT_TX_TYPE_FW;
+		q_idx = MT_LMAC_ALTX0;
+	} else if (beacon) {
+		p_fmt = MT_TX_TYPE_FW;
+		q_idx = MT_LMAC_BCN0;
+	} else if (qid >= MT_TXQ_PSD) {
+		p_fmt = mt76_is_mmio(dev) ? MT_TX_TYPE_CT : MT_TX_TYPE_SF;
+		q_idx = MT_LMAC_ALTX0;
+	} else {
+		p_fmt = mt76_is_mmio(dev) ? MT_TX_TYPE_CT : MT_TX_TYPE_SF;
+		q_idx = wmm_idx * MT76_CONNAC_MAX_WMM_SETS +
+			mt76_connac_lmac_mapping(skb_get_queue_mapping(skb));
+
+		/* counting non-offloading skbs */
+		wcid->stats.tx_bytes += skb->len;
+		wcid->stats.tx_packets++;
+	}
+
+	val = FIELD_PREP(MT_TXD0_TX_BYTES, skb->len + sz_txd) |
+	      FIELD_PREP(MT_TXD0_PKT_FMT, p_fmt) |
+	      FIELD_PREP(MT_TXD0_Q_IDX, q_idx);
+	txwi[0] = cpu_to_le32(val);
+
+	val = FIELD_PREP(MT_TXD1_WLAN_IDX, wcid->idx) |
+	      FIELD_PREP(MT_TXD1_OWN_MAC, omac_idx);
+
+	if (band_idx)
+		val |= FIELD_PREP(MT_TXD1_TGID, band_idx);
+
+	txwi[1] = cpu_to_le32(val);
+	txwi[2] = 0;
+
+	val = FIELD_PREP(MT_TXD3_REM_TX_COUNT, 15);
+
+	if (key)
+		val |= MT_TXD3_PROTECT_FRAME;
+	if (info->flags & IEEE80211_TX_CTL_NO_ACK)
+		val |= MT_TXD3_NO_ACK;
+	if (wcid->amsdu)
+		val |= MT_TXD3_HW_AMSDU;
+
+	txwi[3] = cpu_to_le32(val);
+	txwi[4] = 0;
+
+	val = FIELD_PREP(MT_TXD5_PID, pid);
+	if (pid >= MT_PACKET_ID_FIRST) {
+		val |= MT_TXD5_TX_STATUS_HOST;
+		txwi[3] |= cpu_to_le32(MT_TXD3_BA_DISABLE);
+		txwi[3] &= ~cpu_to_le32(MT_TXD3_HW_AMSDU);
+	}
+
+	txwi[5] = cpu_to_le32(val);
+
+	val = MT_TXD6_DIS_MAT | MT_TXD6_DAS |
+	      FIELD_PREP(MT_TXD6_MSDU_CNT, 1);
+	txwi[6] = cpu_to_le32(val);
+	txwi[7] = 0;
+
+	if (is_8023)
+		mt7925_mac_write_txwi_8023(txwi, skb, wcid);
+	else
+		mt7925_mac_write_txwi_80211(dev, txwi, skb, key);
+
+	if (txwi[1] & cpu_to_le32(MT_TXD1_FIXED_RATE)) {
+		struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+		bool mcast = ieee80211_is_data(hdr->frame_control) &&
+			     is_multicast_ether_addr(hdr->addr1);
+		u8 idx = MT792x_BASIC_RATES_TBL;
+
+		if (mvif) {
+			if (mcast && mvif->mcast_rates_idx)
+				idx = mvif->mcast_rates_idx;
+			else if (beacon && mvif->beacon_rates_idx)
+				idx = mvif->beacon_rates_idx;
+			else
+				idx = mvif->basic_rates_idx;
+		}
+
+		txwi[6] |= cpu_to_le32(FIELD_PREP(MT_TXD6_TX_RATE, idx));
+		txwi[3] |= cpu_to_le32(MT_TXD3_BA_DISABLE);
+	}
+}
+EXPORT_SYMBOL_GPL(mt7925_mac_write_txwi);
+
+static void mt7925_tx_check_aggr(struct ieee80211_sta *sta, __le32 *txwi)
+{
+	struct mt792x_sta *msta;
+	u16 fc, tid;
+	u32 val;
+
+	if (!sta || !(sta->deflink.ht_cap.ht_supported || sta->deflink.he_cap.has_he))
+		return;
+
+	tid = le32_get_bits(txwi[1], MT_TXD1_TID);
+	if (tid >= 6) /* skip VO queue */
+		return;
+
+	val = le32_to_cpu(txwi[2]);
+	fc = FIELD_GET(MT_TXD2_FRAME_TYPE, val) << 2 |
+	     FIELD_GET(MT_TXD2_SUB_TYPE, val) << 4;
+	if (unlikely(fc != (IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_DATA)))
+		return;
+
+	msta = (struct mt792x_sta *)sta->drv_priv;
+	if (!test_and_set_bit(tid, &msta->wcid.ampdu_state))
+		ieee80211_start_tx_ba_session(sta, tid, 0);
+}
+
+static bool
+mt7925_mac_add_txs_skb(struct mt792x_dev *dev, struct mt76_wcid *wcid,
+		       int pid, __le32 *txs_data)
+{
+	struct mt76_sta_stats *stats = &wcid->stats;
+	struct ieee80211_supported_band *sband;
+	struct mt76_dev *mdev = &dev->mt76;
+	struct mt76_phy *mphy;
+	struct ieee80211_tx_info *info;
+	struct sk_buff_head list;
+	struct rate_info rate = {};
+	struct sk_buff *skb;
+	bool cck = false;
+	u32 txrate, txs, mode, stbc;
+
+	mt76_tx_status_lock(mdev, &list);
+	skb = mt76_tx_status_skb_get(mdev, wcid, pid, &list);
+	if (!skb)
+		goto out_no_skb;
+
+	txs = le32_to_cpu(txs_data[0]);
+
+	info = IEEE80211_SKB_CB(skb);
+	if (!(txs & MT_TXS0_ACK_ERROR_MASK))
+		info->flags |= IEEE80211_TX_STAT_ACK;
+
+	info->status.ampdu_len = 1;
+	info->status.ampdu_ack_len = !!(info->flags &
+					IEEE80211_TX_STAT_ACK);
+
+	info->status.rates[0].idx = -1;
+
+	txrate = FIELD_GET(MT_TXS0_TX_RATE, txs);
+
+	rate.mcs = FIELD_GET(MT_TX_RATE_IDX, txrate);
+	rate.nss = FIELD_GET(MT_TX_RATE_NSS, txrate) + 1;
+	stbc = le32_get_bits(txs_data[3], MT_TXS3_RATE_STBC);
+
+	if (stbc && rate.nss > 1)
+		rate.nss >>= 1;
+
+	if (rate.nss - 1 < ARRAY_SIZE(stats->tx_nss))
+		stats->tx_nss[rate.nss - 1]++;
+	if (rate.mcs < ARRAY_SIZE(stats->tx_mcs))
+		stats->tx_mcs[rate.mcs]++;
+
+	mode = FIELD_GET(MT_TX_RATE_MODE, txrate);
+	switch (mode) {
+	case MT_PHY_TYPE_CCK:
+		cck = true;
+		fallthrough;
+	case MT_PHY_TYPE_OFDM:
+		mphy = mt76_dev_phy(mdev, wcid->phy_idx);
+
+		if (mphy->chandef.chan->band == NL80211_BAND_5GHZ)
+			sband = &mphy->sband_5g.sband;
+		else if (mphy->chandef.chan->band == NL80211_BAND_6GHZ)
+			sband = &mphy->sband_6g.sband;
+		else
+			sband = &mphy->sband_2g.sband;
+
+		rate.mcs = mt76_get_rate(mphy->dev, sband, rate.mcs, cck);
+		rate.legacy = sband->bitrates[rate.mcs].bitrate;
+		break;
+	case MT_PHY_TYPE_HT:
+	case MT_PHY_TYPE_HT_GF:
+		if (rate.mcs > 31)
+			goto out;
+
+		rate.flags = RATE_INFO_FLAGS_MCS;
+		if (wcid->rate.flags & RATE_INFO_FLAGS_SHORT_GI)
+			rate.flags |= RATE_INFO_FLAGS_SHORT_GI;
+		break;
+	case MT_PHY_TYPE_VHT:
+		if (rate.mcs > 9)
+			goto out;
+
+		rate.flags = RATE_INFO_FLAGS_VHT_MCS;
+		break;
+	case MT_PHY_TYPE_HE_SU:
+	case MT_PHY_TYPE_HE_EXT_SU:
+	case MT_PHY_TYPE_HE_TB:
+	case MT_PHY_TYPE_HE_MU:
+		if (rate.mcs > 11)
+			goto out;
+
+		rate.he_gi = wcid->rate.he_gi;
+		rate.he_dcm = FIELD_GET(MT_TX_RATE_DCM, txrate);
+		rate.flags = RATE_INFO_FLAGS_HE_MCS;
+		break;
+	case MT_PHY_TYPE_EHT_SU:
+	case MT_PHY_TYPE_EHT_TRIG:
+	case MT_PHY_TYPE_EHT_MU:
+		if (rate.mcs > 13)
+			goto out;
+
+		rate.eht_gi = wcid->rate.eht_gi;
+		rate.flags = RATE_INFO_FLAGS_EHT_MCS;
+		break;
+	default:
+		goto out;
+	}
+
+	stats->tx_mode[mode]++;
+
+	switch (FIELD_GET(MT_TXS0_BW, txs)) {
+	case IEEE80211_STA_RX_BW_160:
+		rate.bw = RATE_INFO_BW_160;
+		stats->tx_bw[3]++;
+		break;
+	case IEEE80211_STA_RX_BW_80:
+		rate.bw = RATE_INFO_BW_80;
+		stats->tx_bw[2]++;
+		break;
+	case IEEE80211_STA_RX_BW_40:
+		rate.bw = RATE_INFO_BW_40;
+		stats->tx_bw[1]++;
+		break;
+	default:
+		rate.bw = RATE_INFO_BW_20;
+		stats->tx_bw[0]++;
+		break;
+	}
+	wcid->rate = rate;
+
+out:
+	mt76_tx_status_skb_done(mdev, skb, &list);
+
+out_no_skb:
+	mt76_tx_status_unlock(mdev, &list);
+
+	return !!skb;
+}
+
+void mt7925_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);
+
+	mt7925_mac_add_txs_skb(dev, 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();
+}
+
+void mt7925_txwi_free(struct mt792x_dev *dev, struct mt76_txwi_cache *t,
+		      struct ieee80211_sta *sta, bool clear_status,
+		      struct list_head *free_list)
+{
+	struct mt76_dev *mdev = &dev->mt76;
+	__le32 *txwi;
+	u16 wcid_idx;
+
+	mt76_connac_txp_skb_unmap(mdev, t);
+	if (!t->skb)
+		goto out;
+
+	txwi = (__le32 *)mt76_get_txwi_ptr(mdev, t);
+	if (sta) {
+		struct mt76_wcid *wcid = (struct mt76_wcid *)sta->drv_priv;
+
+		if (likely(t->skb->protocol != cpu_to_be16(ETH_P_PAE)))
+			mt7925_tx_check_aggr(sta, txwi);
+
+		wcid_idx = wcid->idx;
+	} else {
+		wcid_idx = le32_get_bits(txwi[1], MT_TXD1_WLAN_IDX);
+	}
+
+	__mt76_tx_complete_skb(mdev, wcid_idx, t->skb, free_list);
+out:
+	t->skb = NULL;
+	mt76_put_txwi(mdev, t);
+}
+EXPORT_SYMBOL_GPL(mt7925_txwi_free);
+
+static void
+mt7925_mac_tx_free(struct mt792x_dev *dev, void *data, int len)
+{
+	__le32 *tx_free = (__le32 *)data, *cur_info;
+	struct mt76_dev *mdev = &dev->mt76;
+	struct mt76_txwi_cache *txwi;
+	struct ieee80211_sta *sta = NULL;
+	struct mt76_wcid *wcid = NULL;
+	LIST_HEAD(free_list);
+	struct sk_buff *skb, *tmp;
+	void *end = data + len;
+	bool wake = false;
+	u16 total, count = 0;
+
+	/* 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);
+
+	if (WARN_ON_ONCE(le32_get_bits(tx_free[1], MT_TXFREE1_VER) < 4))
+		return;
+
+	total = le32_get_bits(tx_free[0], MT_TXFREE0_MSDU_CNT);
+	for (cur_info = &tx_free[2]; count < total; cur_info++) {
+		u32 msdu, info;
+		u8 i;
+
+		if (WARN_ON_ONCE((void *)cur_info >= end))
+			return;
+		/* 1'b1: new wcid pair.
+		 * 1'b0: msdu_id with the same 'wcid pair' as above.
+		 */
+		info = le32_to_cpu(*cur_info);
+		if (info & MT_TXFREE_INFO_PAIR) {
+			struct mt792x_sta *msta;
+			u16 idx;
+
+			idx = FIELD_GET(MT_TXFREE_INFO_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;
+		}
+
+		if (info & MT_TXFREE_INFO_HEADER) {
+			if (wcid) {
+				wcid->stats.tx_retries +=
+					FIELD_GET(MT_TXFREE_INFO_COUNT, info) - 1;
+				wcid->stats.tx_failed +=
+					!!FIELD_GET(MT_TXFREE_INFO_STAT, info);
+			}
+			continue;
+		}
+
+		for (i = 0; i < 2; i++) {
+			msdu = (info >> (15 * i)) & MT_TXFREE_INFO_MSDU_ID;
+			if (msdu == MT_TXFREE_INFO_MSDU_ID)
+				continue;
+
+			count++;
+			txwi = mt76_token_release(mdev, msdu, &wake);
+			if (!txwi)
+				continue;
+
+			mt7925_txwi_free(dev, txwi, sta, 0, &free_list);
+		}
+	}
+
+	mt7925_mac_sta_poll(dev);
+
+	if (wake)
+		mt76_set_tx_blocked(&dev->mt76, false);
+
+	mt76_worker_schedule(&dev->mt76.tx_worker);
+
+	list_for_each_entry_safe(skb, tmp, &free_list, list) {
+		skb_list_del_init(skb);
+		napi_consume_skb(skb, 1);
+	}
+}
+
+bool mt7925_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);
+	if (type != PKT_TYPE_NORMAL) {
+		u32 sw_type = le32_get_bits(rxd[0], MT_RXD0_SW_PKT_TYPE_MASK);
+
+		if (unlikely((sw_type & MT_RXD0_SW_PKT_TYPE_MAP) ==
+			     MT_RXD0_SW_PKT_TYPE_FRAME))
+			return true;
+	}
+
+	switch (type) {
+	case PKT_TYPE_TXRX_NOTIFY:
+		/* PKT_TYPE_TXRX_NOTIFY can be received only by mmio devices */
+		mt7925_mac_tx_free(dev, data, len); /* mmio */
+		return false;
+	case PKT_TYPE_TXS:
+		for (rxd += 4; rxd + 12 <= end; rxd += 12)
+			mt7925_mac_add_txs(dev, rxd);
+		return false;
+	default:
+		return true;
+	}
+}
+EXPORT_SYMBOL_GPL(mt7925_rx_check);
+
+void mt7925_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_NORMAL) {
+		u32 sw_type = le32_get_bits(rxd[0], MT_RXD0_SW_PKT_TYPE_MASK);
+
+		if (unlikely((sw_type & MT_RXD0_SW_PKT_TYPE_MAP) ==
+			     MT_RXD0_SW_PKT_TYPE_FRAME))
+			type = PKT_TYPE_NORMAL;
+	}
+
+	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 */
+		mt7925_mac_tx_free(dev, skb->data, skb->len);
+		napi_consume_skb(skb, 1);
+		break;
+	case PKT_TYPE_RX_EVENT:
+		mt7925_mcu_rx_event(dev, skb);
+		break;
+	case PKT_TYPE_TXS:
+		for (rxd += 2; rxd + 8 <= end; rxd += 8)
+			mt7925_mac_add_txs(dev, rxd);
+		dev_kfree_skb(skb);
+		break;
+	case PKT_TYPE_NORMAL_MCU:
+	case PKT_TYPE_NORMAL:
+		if (!mt7925_mac_fill_rx(dev, skb)) {
+			mt76_rx(&dev->mt76, q, skb);
+			return;
+		}
+		fallthrough;
+	default:
+		dev_kfree_skb(skb);
+		break;
+	}
+}
+EXPORT_SYMBOL_GPL(mt7925_queue_rx_skb);
+
+static void
+mt7925_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);
+	mt7925_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);
+		mt7925_mcu_sta_update(dev, NULL, vif, true,
+				      MT76_STA_INFO_STATE_NONE);
+		mt7925_mcu_uni_add_beacon_offload(dev, hw, vif, true);
+	}
+}
+
+/* system error recovery */
+void mt7925_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,
+					    mt7925_vif_connect_iter, NULL);
+	mt76_connac_power_save_sched(&dev->mt76.phy, pm);
+}
+
+void mt7925_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 mt7925_mcu_rxd) + 8);
+		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
+mt7925_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);
+	mt7925_mac_write_txwi(&dev->mt76, txwi, skb, wcid, key, pid, qid, 0);
+	skb_push(skb, MT_SDIO_TXD_SIZE);
+}
+
+int mt7925_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;
+
+	if (unlikely(tx_info->skb->len <= ETH_HLEN))
+		return -EINVAL;
+
+	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);
+	mt7925_usb_sdio_write_txwi(dev, wcid, qid, sta, key, pktid, skb);
+
+	mt7925_skb_add_usb_sdio_hdr(dev, skb, 0);
+	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(mt7925_usb_sdio_tx_prepare_skb);
+
+void mt7925_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)))
+		mt7925_tx_check_aggr(sta, txwi);
+
+	skb_pull(e->skb, headroom);
+	mt76_tx_complete_skb(mdev, e->wcid, e->skb);
+}
+EXPORT_SYMBOL_GPL(mt7925_usb_sdio_tx_complete_skb);
+
+bool mt7925_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);
+	mt7925_mac_sta_poll(dev);
+	mt792x_mutex_release(dev);
+
+	return false;
+}
+EXPORT_SYMBOL_GPL(mt7925_usb_sdio_tx_status_data);
+
+#if IS_ENABLED(CONFIG_IPV6)
+void mt7925_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
-- 
2.18.0




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