wifi: ath12k: Use msdu_end to check MCBC

We are seeing a very low TCP throughput testing with some specific
tools. This is because for sub-frames of an AMSDU, MCBC flag in
mpdu_start may be not valid, and as a result those frames would be
dropped by kernel.

Add a new helper to get it from msdu_end. Also clean up original
helper since it is not needed any more.

Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0-03427-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.15378.4
Signed-off-by: Baochen Qiang <quic_bqiang@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20230529081609.34567-1-quic_bqiang@quicinc.com

drivers/net/wireless/ath/ath12k/dp_rx.c

@@ -193,11 +193,11 @@ static void ath12k_dp_rxdesc_set_msdu_len(struct ath12k_base *ab,
 	ab->hw_params->hal_ops->rx_desc_set_msdu_len(desc, len);
 }
 
-static bool ath12k_dp_rx_h_is_mcbc(struct ath12k_base *ab,
-				   struct hal_rx_desc *desc)
+static bool ath12k_dp_rx_h_is_da_mcbc(struct ath12k_base *ab,
+				      struct hal_rx_desc *desc)
 {
 	return (ath12k_dp_rx_h_first_msdu(ab, desc) &&
-		ab->hw_params->hal_ops->rx_desc_is_mcbc(desc));
+		ab->hw_params->hal_ops->rx_desc_is_da_mcbc(desc));
 }
 
 static bool ath12k_dp_rxdesc_mac_addr2_valid(struct ath12k_base *ab,
@@ -2208,7 +2208,7 @@ static void ath12k_dp_rx_h_mpdu(struct ath12k *ar,
 
 	/* PN for multicast packets will be checked in mac80211 */
 	rxcb = ATH12K_SKB_RXCB(msdu);
-	fill_crypto_hdr = ath12k_dp_rx_h_is_mcbc(ar->ab, rx_desc);
+	fill_crypto_hdr = ath12k_dp_rx_h_is_da_mcbc(ar->ab, rx_desc);
 	rxcb->is_mcbc = fill_crypto_hdr;
 
 	if (rxcb->is_mcbc)

drivers/net/wireless/ath/ath12k/hal.c

@@ -447,10 +447,10 @@ static u8 *ath12k_hw_qcn9274_rx_desc_mpdu_start_addr2(struct hal_rx_desc *desc)
 	return desc->u.qcn9274.mpdu_start.addr2;
 }
 
-static bool ath12k_hw_qcn9274_rx_desc_is_mcbc(struct hal_rx_desc *desc)
+static bool ath12k_hw_qcn9274_rx_desc_is_da_mcbc(struct hal_rx_desc *desc)
 {
-	return __le32_to_cpu(desc->u.qcn9274.mpdu_start.info6) &
-	       RX_MPDU_START_INFO6_MCAST_BCAST;
+	return __le16_to_cpu(desc->u.qcn9274.msdu_end.info5) &
+	       RX_MSDU_END_INFO5_DA_IS_MCBC;
 }
 
 static void ath12k_hw_qcn9274_rx_desc_get_dot11_hdr(struct hal_rx_desc *desc,
@@ -708,7 +708,7 @@ const struct hal_ops hal_qcn9274_ops = {
 	.rx_desc_get_msdu_end_offset = ath12k_hw_qcn9274_rx_desc_get_msdu_end_offset,
 	.rx_desc_mac_addr2_valid = ath12k_hw_qcn9274_rx_desc_mac_addr2_valid,
 	.rx_desc_mpdu_start_addr2 = ath12k_hw_qcn9274_rx_desc_mpdu_start_addr2,
-	.rx_desc_is_mcbc = ath12k_hw_qcn9274_rx_desc_is_mcbc,
+	.rx_desc_is_da_mcbc = ath12k_hw_qcn9274_rx_desc_is_da_mcbc,
 	.rx_desc_get_dot11_hdr = ath12k_hw_qcn9274_rx_desc_get_dot11_hdr,
 	.rx_desc_get_crypto_header = ath12k_hw_qcn9274_rx_desc_get_crypto_hdr,
 	.rx_desc_get_mpdu_frame_ctl = ath12k_hw_qcn9274_rx_desc_get_mpdu_frame_ctl,
@@ -887,10 +887,10 @@ static u8 *ath12k_hw_wcn7850_rx_desc_mpdu_start_addr2(struct hal_rx_desc *desc)
 	return desc->u.wcn7850.mpdu_start.addr2;
 }
 
-static bool ath12k_hw_wcn7850_rx_desc_is_mcbc(struct hal_rx_desc *desc)
+static bool ath12k_hw_wcn7850_rx_desc_is_da_mcbc(struct hal_rx_desc *desc)
 {
-	return __le32_to_cpu(desc->u.wcn7850.mpdu_start.info6) &
-	       RX_MPDU_START_INFO6_MCAST_BCAST;
+	return __le16_to_cpu(desc->u.wcn7850.msdu_end.info5) &
+	       RX_MSDU_END_INFO5_DA_IS_MCBC;
 }
 
 static void ath12k_hw_wcn7850_rx_desc_get_dot11_hdr(struct hal_rx_desc *desc,
@@ -1163,7 +1163,7 @@ const struct hal_ops hal_wcn7850_ops = {
 	.rx_desc_get_msdu_end_offset = ath12k_hw_wcn7850_rx_desc_get_msdu_end_offset,
 	.rx_desc_mac_addr2_valid = ath12k_hw_wcn7850_rx_desc_mac_addr2_valid,
 	.rx_desc_mpdu_start_addr2 = ath12k_hw_wcn7850_rx_desc_mpdu_start_addr2,
-	.rx_desc_is_mcbc = ath12k_hw_wcn7850_rx_desc_is_mcbc,
+	.rx_desc_is_da_mcbc = ath12k_hw_wcn7850_rx_desc_is_da_mcbc,
 	.rx_desc_get_dot11_hdr = ath12k_hw_wcn7850_rx_desc_get_dot11_hdr,
 	.rx_desc_get_crypto_header = ath12k_hw_wcn7850_rx_desc_get_crypto_hdr,
 	.rx_desc_get_mpdu_frame_ctl = ath12k_hw_wcn7850_rx_desc_get_mpdu_frame_ctl,

drivers/net/wireless/ath/ath12k/hal.h

@@ -1063,7 +1063,7 @@ struct hal_ops {
 	u32 (*rx_desc_get_msdu_end_offset)(void);
 	bool (*rx_desc_mac_addr2_valid)(struct hal_rx_desc *desc);
 	u8* (*rx_desc_mpdu_start_addr2)(struct hal_rx_desc *desc);
-	bool (*rx_desc_is_mcbc)(struct hal_rx_desc *desc);
+	bool (*rx_desc_is_da_mcbc)(struct hal_rx_desc *desc);
 	void (*rx_desc_get_dot11_hdr)(struct hal_rx_desc *desc,
 				      struct ieee80211_hdr *hdr);
 	u16 (*rx_desc_get_mpdu_frame_ctl)(struct hal_rx_desc *desc);