wifi: mt76: mt7921e: report tx retries/failed counts in tx free event

Get missing tx retries/failed counts from txfree done events and report
them via mt7921_sta_statistics().
Signed-off-by: Deren Wu <deren.wu@mediatek.com>
Reviewed-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt76_connac2_mac.h

@@ -34,7 +34,7 @@ enum {
 
 #define MT_TX_FREE_MSDU_CNT		GENMASK(9, 0)
 #define MT_TX_FREE_WLAN_ID		GENMASK(23, 14)
-#define MT_TX_FREE_LATENCY		GENMASK(12, 0)
+#define MT_TX_FREE_COUNT		GENMASK(12, 0)
 /* 0: success, others: dropped */
 #define MT_TX_FREE_STATUS		GENMASK(14, 13)
 #define MT_TX_FREE_MSDU_ID		GENMASK(30, 16)

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

@@ -614,6 +614,7 @@ static void mt7921_mac_tx_free(struct mt7921_dev *dev, void *data, int len)
 	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);
@@ -637,7 +638,6 @@ static void mt7921_mac_tx_free(struct mt7921_dev *dev, void *data, int len)
 		 */
 		if (info & MT_TX_FREE_PAIR) {
 			struct mt7921_sta *msta;
-			struct mt76_wcid *wcid;
 			u16 idx;
 
 			count++;
@@ -658,6 +658,12 @@ static void mt7921_mac_tx_free(struct mt7921_dev *dev, void *data, int len)
 		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;

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

@@ -1399,6 +1399,12 @@ static void mt7921_sta_statistics(struct ieee80211_hw *hw,
 		sinfo->txrate.he_dcm = txrate->he_dcm;
 		sinfo->txrate.he_ru_alloc = txrate->he_ru_alloc;
 	}
+	sinfo->tx_failed = msta->wcid.stats.tx_failed;
+	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_FAILED);
+
+	sinfo->tx_retries = msta->wcid.stats.tx_retries;
+	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_RETRIES);
+
 	sinfo->txrate.flags = txrate->flags;
 	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BITRATE);