wifi: mt76: mt7996: get tx_retries and tx_failed from txfree

Retrieve tx retries/failed counts from 'txfree done' events and report
them via mt7996_sta_statistics().
Signed-off-by: Yi-Chia Hsieh <yi-chia.hsieh@mediatek.com>
Signed-off-by: Money Wang <Money.Wang@mediatek.com>
Signed-off-by: Peter Chiu <chui-hao.chiu@mediatek.com>
Signed-off-by: Evelyn Tsai <evelyn.tsai@mediatek.com>
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt76_connac3_mac.h

@@ -271,7 +271,7 @@ enum tx_mgnt_type {
 #define MT_TXFREE0_MSDU_CNT		GENMASK(25, 16)
 #define MT_TXFREE0_RX_BYTE		GENMASK(15, 0)
 
-#define MT_TXFREE1_VER			GENMASK(18, 16)
+#define MT_TXFREE1_VER			GENMASK(19, 16)
 
 #define MT_TXFREE_INFO_PAIR		BIT(31)
 #define MT_TXFREE_INFO_HEADER		BIT(30)

drivers/net/wireless/mediatek/mt76/mt7996/mac.c

@@ -1070,6 +1070,7 @@ mt7996_mac_tx_free(struct mt7996_dev *dev, void *data, int len)
 	struct mt76_phy *phy3 = mdev->phys[MT_BAND2];
 	struct mt76_txwi_cache *txwi;
 	struct ieee80211_sta *sta = NULL;
+	struct mt76_wcid *wcid;
 	LIST_HEAD(free_list);
 	struct sk_buff *skb, *tmp;
 	void *end = data + len;
@@ -1088,7 +1089,7 @@ mt7996_mac_tx_free(struct mt7996_dev *dev, void *data, int len)
 		mt76_queue_tx_cleanup(dev, phy3->q_tx[MT_TXQ_BE], false);
 	}
 
-	if (WARN_ON_ONCE(le32_get_bits(tx_free[1], MT_TXFREE1_VER) < 4))
+	if (WARN_ON_ONCE(le32_get_bits(tx_free[1], MT_TXFREE1_VER) < 5))
 		return;
 
 	total = le32_get_bits(tx_free[0], MT_TXFREE0_MSDU_CNT);
@@ -1104,7 +1105,6 @@ mt7996_mac_tx_free(struct mt7996_dev *dev, void *data, int len)
 		info = le32_to_cpu(*cur_info);
 		if (info & MT_TXFREE_INFO_PAIR) {
 			struct mt7996_sta *msta;
-			struct mt76_wcid *wcid;
 			u16 idx;
 
 			idx = FIELD_GET(MT_TXFREE_INFO_WLAN_ID, info);
@@ -1120,10 +1120,21 @@ mt7996_mac_tx_free(struct mt7996_dev *dev, void *data, int len)
 					      &mdev->sta_poll_list);
 			spin_unlock_bh(&mdev->sta_poll_lock);
 			continue;
-		}
+		} else if (info & MT_TXFREE_INFO_HEADER) {
+			u32 tx_retries = 0, tx_failed = 0;
+
+			if (!wcid)
+				continue;
+
+			tx_retries =
+				FIELD_GET(MT_TXFREE_INFO_COUNT, info) - 1;
+			tx_failed = tx_retries +
+				!!FIELD_GET(MT_TXFREE_INFO_STAT, info);
 
-		if (info & MT_TXFREE_INFO_HEADER)
+			wcid->stats.tx_retries += tx_retries;
+			wcid->stats.tx_failed += tx_failed;
 			continue;
+		}
 
 		for (i = 0; i < 2; i++) {
 			msdu = (info >> (15 * i)) & MT_TXFREE_INFO_MSDU_ID;

drivers/net/wireless/mediatek/mt76/mt7996/main.c

@@ -989,6 +989,12 @@ static void mt7996_sta_statistics(struct ieee80211_hw *hw,
 	sinfo->txrate.flags = txrate->flags;
 	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BITRATE);
 
+	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->ack_signal = (s8)msta->ack_signal;
 	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL);