wifi: mt76: mt7915: report tx retries/failed counts for non-WED path

Get missing tx retries/failed counts from txfree done events and report
them via mt7915_sta_statistics().
Co-developed-by: Peter Chiu <chui-hao.chiu@mediatek.com>
Signed-off-by: Peter Chiu <chui-hao.chiu@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_connac_mac.c

@@ -729,17 +729,15 @@ bool mt76_connac2_mac_add_txs_skb(struct mt76_dev *dev, struct mt76_wcid *wcid,
 	skb = mt76_tx_status_skb_get(dev, wcid, pid, &list);
 	if (skb) {
 		struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
-		bool noacked = !(info->flags & IEEE80211_TX_STAT_ACK);
 
 		if (!(le32_to_cpu(txs_data[0]) & MT_TXS0_ACK_ERROR_MASK))
 			info->flags |= IEEE80211_TX_STAT_ACK;
 
 		info->status.ampdu_len = 1;
-		info->status.ampdu_ack_len = !noacked;
+		info->status.ampdu_ack_len =
+			!!(info->flags & IEEE80211_TX_STAT_ACK);
 		info->status.rates[0].idx = -1;
 
-		wcid->stats.tx_failed += noacked;
-
 		mt76_connac2_mac_fill_txs(dev, wcid, txs_data);
 		mt76_tx_status_skb_done(dev, skb, &list);
 	}

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

@@ -581,6 +581,8 @@ void mt7915_mac_init(struct mt7915_dev *dev)
 
 	if (!is_mt7915(&dev->mt76))
 		mt76_clear(dev, MT_MDP_DCR2, MT_MDP_DCR2_RX_TRANS_SHORT);
+	else
+		mt76_clear(dev, MT_PLE_HOST_RPT0, MT_PLE_HOST_RPT0_TX_LATENCY);
 
 	/* enable hardware de-agg */
 	mt76_set(dev, MT_MDP_DCR0, MT_MDP_DCR0_DAMSDU_EN);

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

@@ -951,6 +951,7 @@ mt7915_mac_tx_free(struct mt7915_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;
 	LIST_HEAD(free_list);
 	void *end = data + len;
 	bool v3, wake = false;
@@ -977,7 +978,6 @@ mt7915_mac_tx_free(struct mt7915_dev *dev, void *data, int len)
 		info = le32_to_cpu(*cur_info);
 		if (info & MT_TX_FREE_PAIR) {
 			struct mt7915_sta *msta;
-			struct mt76_wcid *wcid;
 			u16 idx;
 
 			idx = FIELD_GET(MT_TX_FREE_WLAN_ID, info);
@@ -994,7 +994,25 @@ mt7915_mac_tx_free(struct mt7915_dev *dev, void *data, int len)
 			continue;
 		}
 
-		if (v3 && (info & MT_TX_FREE_MPDU_HEADER))
+		if (!mtk_wed_device_active(&mdev->mmio.wed) && wcid) {
+			u32 tx_retries = 0, tx_failed = 0;
+
+			if (v3 && (info & MT_TX_FREE_MPDU_HEADER_V3)) {
+				tx_retries =
+					FIELD_GET(MT_TX_FREE_COUNT_V3, info) - 1;
+				tx_failed = tx_retries +
+					!!FIELD_GET(MT_TX_FREE_STAT_V3, info);
+			} else if (!v3 && (info & MT_TX_FREE_MPDU_HEADER)) {
+				tx_retries =
+					FIELD_GET(MT_TX_FREE_COUNT, info) - 1;
+				tx_failed = tx_retries +
+					!!FIELD_GET(MT_TX_FREE_STAT, info);
+			}
+			wcid->stats.tx_retries += tx_retries;
+			wcid->stats.tx_failed += tx_failed;
+		}
+
+		if (v3 && (info & MT_TX_FREE_MPDU_HEADER_V3))
 			continue;
 
 		for (i = 0; i < 1 + v3; i++) {

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

@@ -9,7 +9,12 @@
 #define MT_TX_FREE_VER			GENMASK(18, 16)
 #define MT_TX_FREE_MSDU_CNT_V0		GENMASK(6, 0)
 /* 0: success, others: dropped */
-#define MT_TX_FREE_MPDU_HEADER		BIT(30)
+#define MT_TX_FREE_COUNT		GENMASK(12, 0)
+#define MT_TX_FREE_COUNT_V3		GENMASK(27, 24)
+#define MT_TX_FREE_STAT			GENMASK(14, 13)
+#define MT_TX_FREE_STAT_V3		GENMASK(29, 28)
+#define MT_TX_FREE_MPDU_HEADER		BIT(15)
+#define MT_TX_FREE_MPDU_HEADER_V3	BIT(30)
 #define MT_TX_FREE_MSDU_ID_V3		GENMASK(14, 0)
 
 #define MT_TXS5_F0_FINAL_MPDU		BIT(31)

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

@@ -1045,12 +1045,6 @@ static void mt7915_sta_statistics(struct ieee80211_hw *hw,
 		sinfo->tx_packets = msta->wcid.stats.tx_packets;
 		sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_PACKETS);
 
-		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);
-
 		if (mtk_wed_get_rx_capa(&phy->dev->mt76.mmio.wed)) {
 			sinfo->rx_bytes = msta->wcid.stats.rx_bytes;
 			sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_BYTES64);
@@ -1060,6 +1054,12 @@ static void mt7915_sta_statistics(struct ieee80211_hw *hw,
 		}
 	}
 
+	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);
 

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

@@ -145,6 +145,9 @@ enum offs_rev {
 #define MT_PLE_BASE			0x820c0000
 #define MT_PLE(ofs)			(MT_PLE_BASE + (ofs))
 
+#define MT_PLE_HOST_RPT0		MT_PLE(0x030)
+#define MT_PLE_HOST_RPT0_TX_LATENCY	BIT(3)
+
 #define MT_FL_Q_EMPTY			MT_PLE(__OFFS(PLE_FL_Q_EMPTY))
 #define MT_FL_Q0_CTRL			MT_PLE(__OFFS(PLE_FL_Q_CTRL))
 #define MT_FL_Q2_CTRL			MT_PLE(__OFFS(PLE_FL_Q_CTRL) + 0x8)