[PATCH 1/8] wifi: mt76: mt7996: revise TXS size

[Felix Fietkau <nbd@nbd.name>]

From: Benjamin Lin <benjamin-jw.lin@mediatek.com>

Size of MPDU/PPDU TXS is 12 DWs.
In mt7996/mt7992, last 4 DWs are reserved, so TXS size was mistakenly
considered to be 8 DWs. However, in mt7990, 9th DW of TXS starts to be used.

Signed-off-by: Benjamin Lin <benjamin-jw.lin@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
 drivers/net/wireless/mediatek/mt76/mt76_connac3_mac.h | 3 +++
 drivers/net/wireless/mediatek/mt76/mt7996/mac.c       | 4 ++--
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt76_connac3_mac.h b/drivers/net/wireless/mediatek/mt76/mt76_connac3_mac.h
index db0c29e65185..487ad716f872 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76_connac3_mac.h
+++ b/drivers/net/wireless/mediatek/mt76/mt76_connac3_mac.h
@@ -314,6 +314,9 @@ enum tx_frag_idx {
 #define MT_TXFREE_INFO_COUNT		GENMASK(27, 24)
 #define MT_TXFREE_INFO_STAT		GENMASK(29, 28)
 
+#define MT_TXS_HDR_SIZE			4 /* Unit: DW */
+#define MT_TXS_SIZE			12 /* Unit: DW */
+
 #define MT_TXS0_BW			GENMASK(31, 29)
 #define MT_TXS0_TID			GENMASK(28, 26)
 #define MT_TXS0_AMPDU			BIT(25)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/mac.c b/drivers/net/wireless/mediatek/mt76/mt7996/mac.c
index 019c925ae600..33a8049d3356 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7996/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7996/mac.c
@@ -1399,7 +1399,7 @@ bool mt7996_rx_check(struct mt76_dev *mdev, void *data, int len)
 		mt7996_mac_tx_free(dev, data, len);
 		return false;
 	case PKT_TYPE_TXS:
-		for (rxd += 4; rxd + 8 <= end; rxd += 8)
+		for (rxd += MT_TXS_HDR_SIZE; rxd + MT_TXS_SIZE <= end; rxd += MT_TXS_SIZE)
 			mt7996_mac_add_txs(dev, rxd);
 		return false;
 	case PKT_TYPE_RX_FW_MONITOR:
@@ -1442,7 +1442,7 @@ void mt7996_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q,
 		mt7996_mcu_rx_event(dev, skb);
 		break;
 	case PKT_TYPE_TXS:
-		for (rxd += 4; rxd + 8 <= end; rxd += 8)
+		for (rxd += MT_TXS_HDR_SIZE; rxd + MT_TXS_SIZE <= end; rxd += MT_TXS_SIZE)
 			mt7996_mac_add_txs(dev, rxd);
 		dev_kfree_skb(skb);
 		break;
-- 
2.47.1