mt76: mt7915: report tx rate directly from tx status

Report tx rate from tx status packets instead of receving periodic mcu
event. This improves flexibility, accuracy and AQL performance, and
simplifies code flow for better readability.
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt76.h

@@ -244,6 +244,8 @@ struct mt76_wcid {
 	struct ewma_signal rssi;
 	int inactive_count;
 
+	struct rate_info rate;
+
 	u16 idx;
 	u8 hw_key_idx;
 	u8 hw_key_idx2;

drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c

@@ -377,56 +377,9 @@ static int mt7915_sta_fixed_rate_set(void *data, u64 rate)
 DEFINE_DEBUGFS_ATTRIBUTE(fops_fixed_rate, NULL,
 			 mt7915_sta_fixed_rate_set, "%llx\n");
 
-static int
-mt7915_sta_stats_show(struct seq_file *s, void *data)
-{
-	struct ieee80211_sta *sta = s->private;
-	struct mt7915_sta *msta = (struct mt7915_sta *)sta->drv_priv;
-	struct mt7915_sta_stats *stats = &msta->stats;
-	struct rate_info *rate = &stats->prob_rate;
-	static const char * const bw[] = {
-		"BW20", "BW5", "BW10", "BW40",
-		"BW80", "BW160", "BW_HE_RU"
-	};
-
-	if (!rate->legacy && !rate->flags)
-		return 0;
-
-	seq_puts(s, "Probing rate - ");
-	if (rate->flags & RATE_INFO_FLAGS_MCS)
-		seq_puts(s, "HT ");
-	else if (rate->flags & RATE_INFO_FLAGS_VHT_MCS)
-		seq_puts(s, "VHT ");
-	else if (rate->flags & RATE_INFO_FLAGS_HE_MCS)
-		seq_puts(s, "HE ");
-	else
-		seq_printf(s, "Bitrate %d\n", rate->legacy);
-
-	if (rate->flags) {
-		seq_printf(s, "%s NSS%d MCS%d ",
-			   bw[rate->bw], rate->nss, rate->mcs);
-
-		if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
-			seq_puts(s, "SGI ");
-		else if (rate->he_gi)
-			seq_puts(s, "HE GI ");
-
-		if (rate->he_dcm)
-			seq_puts(s, "DCM ");
-	}
-
-	seq_printf(s, "\nPPDU PER: %ld.%1ld%%\n",
-		   stats->per / 10, stats->per % 10);
-
-	return 0;
-}
-
-DEFINE_SHOW_ATTRIBUTE(mt7915_sta_stats);
-
 void mt7915_sta_add_debugfs(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 			    struct ieee80211_sta *sta, struct dentry *dir)
 {
 	debugfs_create_file("fixed_rate", 0600, dir, sta, &fops_fixed_rate);
-	debugfs_create_file("stats", 0400, dir, sta, &mt7915_sta_stats_fops);
 }
 #endif

drivers/net/wireless/mediatek/mt76/mt7915/init.c

@@ -350,7 +350,6 @@ static int mt7915_register_ext_phy(struct mt7915_dev *dev)
 	mphy->chainmask = dev->chainmask & ~dev->mphy.chainmask;
 	mphy->antenna_mask = BIT(hweight8(mphy->chainmask)) - 1;
 
-	INIT_LIST_HEAD(&phy->stats_list);
 	INIT_DELAYED_WORK(&mphy->mac_work, mt7915_mac_work);
 
 	mt7915_eeprom_parse_band_config(phy);
@@ -787,7 +786,6 @@ int mt7915_register_device(struct mt7915_dev *dev)
 	dev->phy.dev = dev;
 	dev->phy.mt76 = &dev->mt76.phy;
 	dev->mt76.phy.priv = &dev->phy;
-	INIT_LIST_HEAD(&dev->phy.stats_list);
 	INIT_WORK(&dev->rc_work, mt7915_mac_sta_rc_work);
 	INIT_DELAYED_WORK(&dev->mphy.mac_work, mt7915_mac_work);
 	INIT_LIST_HEAD(&dev->sta_rc_list);

drivers/net/wireless/mediatek/mt76/mt7915/mac.c

@@ -88,15 +88,14 @@ bool mt7915_mac_wtbl_update(struct mt7915_dev *dev, int idx, u32 mask)
 			 0, 5000);
 }
 
-static u32 mt7915_mac_wtbl_lmac_addr(struct mt7915_dev *dev, u16 wcid)
+static u32 mt7915_mac_wtbl_lmac_addr(struct mt7915_dev *dev, u16 wcid, u8 dw)
 {
 	mt76_wr(dev, MT_WTBLON_TOP_WDUCR,
 		FIELD_PREP(MT_WTBLON_TOP_WDUCR_GROUP, (wcid >> 7)));
 
-	return MT_WTBL_LMAC_OFFS(wcid, 0);
+	return MT_WTBL_LMAC_OFFS(wcid, dw);
 }
 
-/* TODO: use txfree airtime info to avoid runtime accessing in the long run */
 static void mt7915_mac_sta_poll(struct mt7915_dev *dev)
 {
 	static const u8 ac_to_tid[] = {
@@ -107,6 +106,7 @@ static void mt7915_mac_sta_poll(struct mt7915_dev *dev)
 	};
 	struct ieee80211_sta *sta;
 	struct mt7915_sta *msta;
+	struct rate_info *rate;
 	u32 tx_time[IEEE80211_NUM_ACS], rx_time[IEEE80211_NUM_ACS];
 	LIST_HEAD(sta_poll_list);
 	int i;
@@ -119,8 +119,9 @@ static void mt7915_mac_sta_poll(struct mt7915_dev *dev)
 
 	while (true) {
 		bool clear = false;
-		u32 addr;
+		u32 addr, val;
 		u16 idx;
+		u8 bw;
 
 		spin_lock_bh(&dev->sta_poll_lock);
 		if (list_empty(&sta_poll_list)) {
@@ -133,7 +134,7 @@ static void mt7915_mac_sta_poll(struct mt7915_dev *dev)
 		spin_unlock_bh(&dev->sta_poll_lock);
 
 		idx = msta->wcid.idx;
-		addr = mt7915_mac_wtbl_lmac_addr(dev, idx) + 20 * 4;
+		addr = mt7915_mac_wtbl_lmac_addr(dev, idx, 20);
 
 		for (i = 0; i < IEEE80211_NUM_ACS; i++) {
 			u32 tx_last = msta->airtime_ac[i];
@@ -174,6 +175,43 @@ static void mt7915_mac_sta_poll(struct mt7915_dev *dev)
 			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 = mt7915_mac_wtbl_lmac_addr(dev, idx, 7);
+		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 = 24 + 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(12 + bw))
+				rate->flags |= RATE_INFO_FLAGS_SHORT_GI;
+			else
+				rate->flags &= ~RATE_INFO_FLAGS_SHORT_GI;
+		}
 	}
 
 	rcu_read_unlock();
@@ -1057,6 +1095,17 @@ int mt7915_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr,
 	if (!wcid)
 		wcid = &dev->mt76.global_wcid;
 
+	if (sta) {
+		struct mt7915_sta *msta;
+
+		msta = (struct mt7915_sta *)sta->drv_priv;
+
+		if (time_after(jiffies, msta->stats.jiffies + HZ / 4)) {
+			info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
+			msta->stats.jiffies = jiffies;
+		}
+	}
+
 	pid = mt76_tx_status_skb_add(mdev, wcid, tx_info->skb);
 
 	mt7915_mac_write_txwi(dev, txwi_ptr, tx_info->skb, wcid, pid, key,
@@ -1222,8 +1271,6 @@ mt7915_mac_tx_free(struct mt7915_dev *dev, struct sk_buff *skb)
 
 			msta = container_of(wcid, struct mt7915_sta, wcid);
 			spin_lock_bh(&dev->sta_poll_lock);
-			if (list_empty(&msta->stats_list))
-				list_add_tail(&msta->stats_list, &phy->stats_list);
 			if (list_empty(&msta->poll_list))
 				list_add_tail(&msta->poll_list, &dev->sta_poll_list);
 			spin_unlock_bh(&dev->sta_poll_lock);
@@ -1257,18 +1304,25 @@ static bool
 mt7915_mac_add_txs_skb(struct mt7915_dev *dev, struct mt76_wcid *wcid, int pid,
 		       __le32 *txs_data)
 {
+	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;
 
 	mt76_tx_status_lock(mdev, &list);
 	skb = mt76_tx_status_skb_get(mdev, wcid, pid, &list);
 	if (!skb)
 		goto out;
 
+	txs = le32_to_cpu(txs_data[0]);
+
 	info = IEEE80211_SKB_CB(skb);
-	if (!(txs_data[0] & cpu_to_le32(MT_TXS0_ACK_ERROR_MASK)))
+	if (!(txs & MT_TXS0_ACK_ERROR_MASK))
 		info->flags |= IEEE80211_TX_STAT_ACK;
 
 	info->status.ampdu_len = 1;
@@ -1276,9 +1330,81 @@ mt7915_mac_add_txs_skb(struct mt7915_dev *dev, struct mt76_wcid *wcid, int pid,
 					IEEE80211_TX_STAT_ACK);
 
 	info->status.rates[0].idx = -1;
-	mt76_tx_status_skb_done(mdev, skb, &list);
+
+	if (!wcid->sta)
+		goto out;
+
+	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;
+
+	switch (FIELD_GET(MT_TX_RATE_MODE, txrate)) {
+	case MT_PHY_TYPE_CCK:
+		cck = true;
+		fallthrough;
+	case MT_PHY_TYPE_OFDM:
+		mphy = &dev->mphy;
+		if (wcid->ext_phy && dev->mt76.phy2)
+			mphy = dev->mt76.phy2;
+
+		if (mphy->chandef.chan->band == NL80211_BAND_5GHZ)
+			sband = &mphy->sband_5g.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:
+		rate.mcs += (rate.nss - 1) * 8;
+		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;
+	default:
+		goto out;
+	}
+
+	switch (FIELD_GET(MT_TXS0_BW, txs)) {
+	case IEEE80211_STA_RX_BW_160:
+		rate.bw = RATE_INFO_BW_160;
+		break;
+	case IEEE80211_STA_RX_BW_80:
+		rate.bw = RATE_INFO_BW_80;
+		break;
+	case IEEE80211_STA_RX_BW_40:
+		rate.bw = RATE_INFO_BW_40;
+		break;
+	default:
+		rate.bw = RATE_INFO_BW_20;
+		break;
+	}
+	wcid->rate = rate;
 
 out:
+	mt76_tx_status_skb_done(mdev, skb, &list);
 	mt76_tx_status_unlock(mdev, &list);
 
 	return !!skb;
@@ -1769,30 +1895,6 @@ mt7915_mac_update_stats(struct mt7915_phy *phy)
 	}
 }
 
-static void
-mt7915_mac_sta_stats_work(struct mt7915_phy *phy)
-{
-	struct mt7915_dev *dev = phy->dev;
-	struct mt7915_sta *msta;
-	LIST_HEAD(list);
-
-	spin_lock_bh(&dev->sta_poll_lock);
-	list_splice_init(&phy->stats_list, &list);
-
-	while (!list_empty(&list)) {
-		msta = list_first_entry(&list, struct mt7915_sta, stats_list);
-		list_del_init(&msta->stats_list);
-		spin_unlock_bh(&dev->sta_poll_lock);
-
-		/* use MT_TX_FREE_RATE to report Tx rate for further devices */
-		mt7915_mcu_get_tx_rate(dev, RATE_CTRL_RU_INFO, msta->wcid.idx);
-
-		spin_lock_bh(&dev->sta_poll_lock);
-	}
-
-	spin_unlock_bh(&dev->sta_poll_lock);
-}
-
 void mt7915_mac_sta_rc_work(struct work_struct *work)
 {
 	struct mt7915_dev *dev = container_of(work, struct mt7915_dev, rc_work);
@@ -1849,11 +1951,6 @@ void mt7915_mac_work(struct work_struct *work)
 		mt7915_mac_update_stats(phy);
 	}
 
-	if (++phy->sta_work_count == 10) {
-		phy->sta_work_count = 0;
-		mt7915_mac_sta_stats_work(phy);
-	}
-
 	mutex_unlock(&mphy->dev->mutex);
 
 	mt76_tx_status_check(mphy->dev, NULL, false);

drivers/net/wireless/mediatek/mt76/mt7915/main.c

@@ -231,7 +231,6 @@ static int mt7915_add_interface(struct ieee80211_hw *hw,
 	idx = MT7915_WTBL_RESERVED - mvif->idx;
 
 	INIT_LIST_HEAD(&mvif->sta.rc_list);
-	INIT_LIST_HEAD(&mvif->sta.stats_list);
 	INIT_LIST_HEAD(&mvif->sta.poll_list);
 	mvif->sta.wcid.idx = idx;
 	mvif->sta.wcid.ext_phy = mvif->band_idx;
@@ -618,7 +617,6 @@ int mt7915_mac_sta_add(struct mt76_dev *mdev, struct ieee80211_vif *vif,
 		return -ENOSPC;
 
 	INIT_LIST_HEAD(&msta->rc_list);
-	INIT_LIST_HEAD(&msta->stats_list);
 	INIT_LIST_HEAD(&msta->poll_list);
 	msta->vif = mvif;
 	msta->wcid.sta = 1;
@@ -652,8 +650,6 @@ void mt7915_mac_sta_remove(struct mt76_dev *mdev, struct ieee80211_vif *vif,
 	spin_lock_bh(&dev->sta_poll_lock);
 	if (!list_empty(&msta->poll_list))
 		list_del_init(&msta->poll_list);
-	if (!list_empty(&msta->stats_list))
-		list_del_init(&msta->stats_list);
 	if (!list_empty(&msta->rc_list))
 		list_del_init(&msta->rc_list);
 	spin_unlock_bh(&dev->sta_poll_lock);
@@ -926,7 +922,7 @@ static void mt7915_sta_statistics(struct ieee80211_hw *hw,
 {
 	struct mt7915_phy *phy = mt7915_hw_phy(hw);
 	struct mt7915_sta *msta = (struct mt7915_sta *)sta->drv_priv;
-	struct mt7915_sta_stats *stats = &msta->stats;
+	struct rate_info *txrate = &msta->wcid.rate;
 	struct rate_info rxrate = {};
 
 	if (!mt7915_mcu_get_rx_rate(phy, vif, sta, &rxrate)) {
@@ -934,20 +930,20 @@ static void mt7915_sta_statistics(struct ieee80211_hw *hw,
 		sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_BITRATE);
 	}
 
-	if (!stats->tx_rate.legacy && !stats->tx_rate.flags)
+	if (!txrate->legacy && !txrate->flags)
 		return;
 
-	if (stats->tx_rate.legacy) {
-		sinfo->txrate.legacy = stats->tx_rate.legacy;
+	if (txrate->legacy) {
+		sinfo->txrate.legacy = txrate->legacy;
 	} else {
-		sinfo->txrate.mcs = stats->tx_rate.mcs;
-		sinfo->txrate.nss = stats->tx_rate.nss;
-		sinfo->txrate.bw = stats->tx_rate.bw;
-		sinfo->txrate.he_gi = stats->tx_rate.he_gi;
-		sinfo->txrate.he_dcm = stats->tx_rate.he_dcm;
-		sinfo->txrate.he_ru_alloc = stats->tx_rate.he_ru_alloc;
+		sinfo->txrate.mcs = txrate->mcs;
+		sinfo->txrate.nss = txrate->nss;
+		sinfo->txrate.bw = txrate->bw;
+		sinfo->txrate.he_gi = txrate->he_gi;
+		sinfo->txrate.he_dcm = txrate->he_dcm;
+		sinfo->txrate.he_ru_alloc = txrate->he_ru_alloc;
 	}
-	sinfo->txrate.flags = stats->tx_rate.flags;
+	sinfo->txrate.flags = txrate->flags;
 	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BITRATE);
 }
 

drivers/net/wireless/mediatek/mt76/mt7915/mcu.c

@@ -488,152 +488,6 @@ mt7915_mcu_rx_radar_detected(struct mt7915_dev *dev, struct sk_buff *skb)
 	dev->hw_pattern++;
 }
 
-static int
-mt7915_mcu_tx_rate_parse(struct mt76_phy *mphy, struct mt7915_mcu_ra_info *ra,
-			 struct rate_info *rate, u16 r)
-{
-	struct ieee80211_supported_band *sband;
-	u16 ru_idx = le16_to_cpu(ra->ru_idx);
-	bool cck = false;
-
-	rate->mcs = FIELD_GET(MT_RA_RATE_MCS, r);
-	rate->nss = FIELD_GET(MT_RA_RATE_NSS, r) + 1;
-
-	switch (FIELD_GET(MT_RA_RATE_TX_MODE, r)) {
-	case MT_PHY_TYPE_CCK:
-		cck = true;
-		fallthrough;
-	case MT_PHY_TYPE_OFDM:
-		if (mphy->chandef.chan->band == NL80211_BAND_5GHZ)
-			sband = &mphy->sband_5g.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:
-		rate->mcs += (rate->nss - 1) * 8;
-		if (rate->mcs > 31)
-			return -EINVAL;
-
-		rate->flags = RATE_INFO_FLAGS_MCS;
-		if (ra->gi)
-			rate->flags |= RATE_INFO_FLAGS_SHORT_GI;
-		break;
-	case MT_PHY_TYPE_VHT:
-		if (rate->mcs > 9)
-			return -EINVAL;
-
-		rate->flags = RATE_INFO_FLAGS_VHT_MCS;
-		if (ra->gi)
-			rate->flags |= RATE_INFO_FLAGS_SHORT_GI;
-		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 (ra->gi > NL80211_RATE_INFO_HE_GI_3_2 || rate->mcs > 11)
-			return -EINVAL;
-
-		rate->he_gi = ra->gi;
-		rate->he_dcm = FIELD_GET(MT_RA_RATE_DCM_EN, r);
-		rate->flags = RATE_INFO_FLAGS_HE_MCS;
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	if (ru_idx) {
-		switch (ru_idx) {
-		case 1 ... 2:
-			rate->he_ru_alloc = NL80211_RATE_INFO_HE_RU_ALLOC_996;
-			break;
-		case 3 ... 6:
-			rate->he_ru_alloc = NL80211_RATE_INFO_HE_RU_ALLOC_484;
-			break;
-		case 7 ... 14:
-			rate->he_ru_alloc = NL80211_RATE_INFO_HE_RU_ALLOC_242;
-			break;
-		default:
-			rate->he_ru_alloc = NL80211_RATE_INFO_HE_RU_ALLOC_106;
-			break;
-		}
-		rate->bw = RATE_INFO_BW_HE_RU;
-	} else {
-		u8 bw = mt7915_mcu_chan_bw(&mphy->chandef) -
-			FIELD_GET(MT_RA_RATE_BW, r);
-
-		switch (bw) {
-		case IEEE80211_STA_RX_BW_160:
-			rate->bw = RATE_INFO_BW_160;
-			break;
-		case IEEE80211_STA_RX_BW_80:
-			rate->bw = RATE_INFO_BW_80;
-			break;
-		case IEEE80211_STA_RX_BW_40:
-			rate->bw = RATE_INFO_BW_40;
-			break;
-		default:
-			rate->bw = RATE_INFO_BW_20;
-			break;
-		}
-	}
-
-	return 0;
-}
-
-static void
-mt7915_mcu_tx_rate_report(struct mt7915_dev *dev, struct sk_buff *skb)
-{
-	struct mt7915_mcu_ra_info *ra = (struct mt7915_mcu_ra_info *)skb->data;
-	struct rate_info rate = {}, prob_rate = {};
-	u16 probe = le16_to_cpu(ra->prob_up_rate);
-	u16 attempts = le16_to_cpu(ra->attempts);
-	u16 curr = le16_to_cpu(ra->curr_rate);
-	u16 wcidx = le16_to_cpu(ra->wlan_idx);
-	struct ieee80211_tx_status status = {};
-	struct mt76_phy *mphy = &dev->mphy;
-	struct mt7915_sta_stats *stats;
-	struct mt7915_sta *msta;
-	struct mt76_wcid *wcid;
-
-	if (wcidx >= MT76_N_WCIDS)
-		return;
-
-	wcid = rcu_dereference(dev->mt76.wcid[wcidx]);
-	if (!wcid)
-		return;
-
-	msta = container_of(wcid, struct mt7915_sta, wcid);
-	stats = &msta->stats;
-
-	if (msta->wcid.ext_phy && dev->mt76.phy2)
-		mphy = dev->mt76.phy2;
-
-	/* current rate */
-	if (!mt7915_mcu_tx_rate_parse(mphy, ra, &rate, curr))
-		stats->tx_rate = rate;
-
-	/* probing rate */
-	if (!mt7915_mcu_tx_rate_parse(mphy, ra, &prob_rate, probe))
-		stats->prob_rate = prob_rate;
-
-	if (attempts) {
-		u16 success = le16_to_cpu(ra->success);
-
-		stats->per = 1000 * (attempts - success) / attempts;
-	}
-
-	status.sta = wcid_to_sta(wcid);
-	if (!status.sta)
-		return;
-
-	status.rate = &stats->tx_rate;
-	ieee80211_tx_status_ext(mphy->hw, &status);
-}
-
 static void
 mt7915_mcu_rx_log_message(struct mt7915_dev *dev, struct sk_buff *skb)
 {
@@ -672,9 +526,6 @@ mt7915_mcu_rx_ext_event(struct mt7915_dev *dev, struct sk_buff *skb)
 	case MCU_EXT_EVENT_CSA_NOTIFY:
 		mt7915_mcu_rx_csa_notify(dev, skb);
 		break;
-	case MCU_EXT_EVENT_RATE_REPORT:
-		mt7915_mcu_tx_rate_report(dev, skb);
-		break;
 	case MCU_EXT_EVENT_FW_LOG_2_HOST:
 		mt7915_mcu_rx_log_message(dev, skb);
 		break;
@@ -706,7 +557,6 @@ void mt7915_mcu_rx_event(struct mt7915_dev *dev, struct sk_buff *skb)
 	    rxd->ext_eid == MCU_EXT_EVENT_FW_LOG_2_HOST ||
 	    rxd->ext_eid == MCU_EXT_EVENT_ASSERT_DUMP ||
 	    rxd->ext_eid == MCU_EXT_EVENT_PS_SYNC ||
-	    rxd->ext_eid == MCU_EXT_EVENT_RATE_REPORT ||
 	    !rxd->seq)
 		mt7915_mcu_rx_unsolicited_event(dev, skb);
 	else
@@ -3736,24 +3586,6 @@ int mt7915_mcu_set_thermal_throttling(struct mt7915_phy *phy, u8 state)
 				 &req, sizeof(req), false);
 }
 
-int mt7915_mcu_get_tx_rate(struct mt7915_dev *dev, u32 cmd, u16 wlan_idx)
-{
-	struct {
-		__le32 cmd;
-		__le16 wlan_idx;
-		__le16 ru_idx;
-		__le16 direction;
-		__le16 dump_group;
-	} req = {
-		.cmd = cpu_to_le32(cmd),
-		.wlan_idx = cpu_to_le16(wlan_idx),
-		.dump_group = cpu_to_le16(1),
-	};
-
-	return mt76_mcu_send_msg(&dev->mt76, MCU_EXT_CMD(RATE_CTRL), &req,
-				 sizeof(req), false);
-}
-
 int mt7915_mcu_set_txpower_sku(struct mt7915_phy *phy)
 {
 	struct mt7915_dev *dev = phy->dev;

drivers/net/wireless/mediatek/mt76/mt7915/mcu.h

@@ -43,7 +43,6 @@ enum {
 	MCU_EXT_EVENT_ASSERT_DUMP = 0x23,
 	MCU_EXT_EVENT_RDD_REPORT = 0x3a,
 	MCU_EXT_EVENT_CSA_NOTIFY = 0x4f,
-	MCU_EXT_EVENT_RATE_REPORT = 0x87,
 };
 
 enum {
@@ -164,41 +163,6 @@ struct mt7915_mcu_eeprom_info {
 	u8 data[16];
 } __packed;
 
-struct mt7915_mcu_ra_info {
-	struct mt7915_mcu_rxd rxd;
-
-	__le32 event_id;
-	__le16 wlan_idx;
-	__le16 ru_idx;
-	__le16 direction;
-	__le16 dump_group;
-
-	__le32 suggest_rate;
-	__le32 min_rate;	/* for dynamic sounding */
-	__le32 max_rate;	/* for dynamic sounding */
-	__le32 init_rate_down_rate;
-
-	__le16 curr_rate;
-	__le16 init_rate_down_total;
-	__le16 init_rate_down_succ;
-	__le16 success;
-	__le16 attempts;
-
-	__le16 prev_rate;
-	__le16 prob_up_rate;
-	u8 no_rate_up_cnt;
-	u8 ppdu_cnt;
-	u8 gi;
-
-	u8 try_up_fail;
-	u8 try_up_total;
-	u8 suggest_wf;
-	u8 try_up_check;
-	u8 prob_up_period;
-	u8 prob_down_pending;
-} __packed;
-
-
 struct mt7915_mcu_phy_rx_info {
 	u8 category;
 	u8 rate;
@@ -210,12 +174,6 @@ struct mt7915_mcu_phy_rx_info {
 	u8 bw;
 };
 
-#define MT_RA_RATE_NSS			GENMASK(8, 6)
-#define MT_RA_RATE_MCS			GENMASK(3, 0)
-#define MT_RA_RATE_TX_MODE		GENMASK(12, 9)
-#define MT_RA_RATE_DCM_EN		BIT(4)
-#define MT_RA_RATE_BW			GENMASK(14, 13)
-
 struct mt7915_mcu_mib {
 	__le32 band;
 	__le32 offs;
@@ -318,7 +276,6 @@ enum {
 	MCU_EXT_CMD_MWDS_SUPPORT = 0x80,
 	MCU_EXT_CMD_SET_SER_TRIGGER = 0x81,
 	MCU_EXT_CMD_SCS_CTRL = 0x82,
-	MCU_EXT_CMD_RATE_CTRL = 0x87,
 	MCU_EXT_CMD_FW_DBG_CTRL = 0x95,
 	MCU_EXT_CMD_SET_RDD_TH = 0x9d,
 	MCU_EXT_CMD_SET_SPR = 0xa8,

drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h

@@ -65,10 +65,6 @@ enum mt7915_rxq_id {
 };
 
 struct mt7915_sta_stats {
-	struct rate_info prob_rate;
-	struct rate_info tx_rate;
-
-	unsigned long per;
 	unsigned long changed;
 	unsigned long jiffies;
 };
@@ -83,7 +79,6 @@ struct mt7915_sta {
 
 	struct mt7915_vif *vif;
 
-	struct list_head stats_list;
 	struct list_head poll_list;
 	struct list_head rc_list;
 	u32 airtime_ac[8];
@@ -94,7 +89,6 @@ struct mt7915_sta {
 
 	struct mt7915_sta_key_conf bip;
 };
-
 struct mt7915_vif {
 	u16 idx;
 	u8 omac_idx;
@@ -151,9 +145,6 @@ struct mt7915_phy {
 
 	struct mib_stats mib;
 	struct mt76_channel_state state_ts;
-	struct list_head stats_list;
-
-	u8 sta_work_count;
 
 #ifdef CONFIG_NL80211_TESTMODE
 	struct {
@@ -250,13 +241,6 @@ enum mt7915_rdd_cmd {
 	RDD_IRQ_OFF,
 };
 
-enum {
-	RATE_CTRL_RU_INFO,
-	RATE_CTRL_FIXED_RATE_INFO,
-	RATE_CTRL_DUMP_INFO,
-	RATE_CTRL_MU_INFO,
-};
-
 static inline struct mt7915_phy *
 mt7915_hw_phy(struct ieee80211_hw *hw)
 {
@@ -367,7 +351,6 @@ int mt7915_mcu_apply_tx_dpd(struct mt7915_phy *phy);
 int mt7915_mcu_get_chan_mib_info(struct mt7915_phy *phy, bool chan_switch);
 int mt7915_mcu_get_temperature(struct mt7915_phy *phy);
 int mt7915_mcu_set_thermal_throttling(struct mt7915_phy *phy, u8 state);
-int mt7915_mcu_get_tx_rate(struct mt7915_dev *dev, u32 cmd, u16 wlan_idx);
 int mt7915_mcu_get_rx_rate(struct mt7915_phy *phy, struct ieee80211_vif *vif,
 			   struct ieee80211_sta *sta, struct rate_info *rate);
 int mt7915_mcu_rdd_cmd(struct mt7915_dev *dev, enum mt7915_rdd_cmd cmd,

drivers/net/wireless/mediatek/mt76/mt7921/mac.c

@@ -1092,15 +1092,11 @@ void mt7921_mac_tx_free(struct mt7921_dev *dev, struct sk_buff *skb)
 
 void mt7921_tx_complete_skb(struct mt76_dev *mdev, struct mt76_queue_entry *e)
 {
-	struct mt7921_dev *dev;
-
 	if (!e->txwi) {
 		dev_kfree_skb_any(e->skb);
 		return;
 	}
 
-	dev = container_of(mdev, struct mt7921_dev, mt76);
-
 	/* error path */
 	if (e->skb == DMA_DUMMY_DATA) {
 		struct mt76_txwi_cache *t;

drivers/net/wireless/mediatek/mt76/tx.c

@@ -64,9 +64,13 @@ mt76_tx_status_unlock(struct mt76_dev *dev, struct sk_buff_head *list)
 		struct mt76_wcid *wcid;
 
 		wcid = rcu_dereference(dev->wcid[cb->wcid]);
-		if (wcid)
+		if (wcid) {
 			status.sta = wcid_to_sta(wcid);
 
+			if (status.sta)
+				status.rate = &wcid->rate;
+		}
+
 		hw = mt76_tx_status_get_hw(dev, skb);
 		ieee80211_tx_status_ext(hw, &status);
 	}