[PATCH ath-next v2 0/2] wifi: ath12k: correctly check RX multicast bit

[PATCH ath-next v2 0/2] wifi: ath12k: correctly check RX multicast bit

[Sarika Sharma]

Currently, the RX multicast broadcast bit is fetched from the MPDU
start descriptor. However, in some scenarios, the value is not
accurate. Therefore, changing the process to fetch the bit from the
MSDU end descriptor for improved reliability.

Sarika Sharma (2):
  wifi: ath12k: using msdu end descriptor to check for rx multicast
    packets
  wifi: ath12k: correctly handle mcast packets for clients

 drivers/net/wireless/ath/ath12k/dp_rx.c | 5 +++++
 drivers/net/wireless/ath/ath12k/hal.c   | 8 ++++----
 drivers/net/wireless/ath/ath12k/peer.c  | 5 ++++-
 drivers/net/wireless/ath/ath12k/peer.h  | 3 ++-
 4 files changed, 15 insertions(+), 6 deletions(-)


base-commit: ac17b1211841c98a9b4c2900ba2a7f457c80cf90
-- 
2.34.1

[PATCH ath-next v2 1/2] wifi: ath12k: using msdu end descriptor to check for rx multicast packets

[Sarika Sharma]

Currently, the RX multicast broadcast packet check is performed using
bit 15 from the info6 field of the MPDU start descriptor. This check
can also be done using bit 9 from the info5 field of the MSDU end
descriptor. However, in some scenarios multicast bit is not set when
fetched from MPDU start descriptor.
Therefore, checking the RX multicast broadcast packet from the MSDU
end descriptor is more reliable as it is per MSDU.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1

Signed-off-by: Sarika Sharma <quic_sarishar@quicinc.com>
---
 drivers/net/wireless/ath/ath12k/hal.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/ath/ath12k/hal.c b/drivers/net/wireless/ath/ath12k/hal.c
index d00869a33fea..12d0f991a47f 100644
--- a/drivers/net/wireless/ath/ath12k/hal.c
+++ b/drivers/net/wireless/ath/ath12k/hal.c
@@ -449,8 +449,8 @@ static u8 *ath12k_hw_qcn9274_rx_desc_mpdu_start_addr2(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,
@@ -902,8 +902,8 @@ static u8 *ath12k_hw_qcn9274_compact_rx_desc_mpdu_start_addr2(struct hal_rx_desc
 
 static bool ath12k_hw_qcn9274_compact_rx_desc_is_da_mcbc(struct hal_rx_desc *desc)
 {
-	return __le32_to_cpu(desc->u.qcn9274_compact.mpdu_start.info6) &
-	       RX_MPDU_START_INFO6_MCAST_BCAST;
+	return __le16_to_cpu(desc->u.qcn9274_compact.msdu_end.info5) &
+	       RX_MSDU_END_INFO5_DA_IS_MCBC;
 }
 
 static void ath12k_hw_qcn9274_compact_rx_desc_get_dot11_hdr(struct hal_rx_desc *desc,
-- 
2.34.1

Re: [PATCH ath-next v2 1/2] wifi: ath12k: using msdu end descriptor to check for rx multicast packets

[Vasanthakumar Thiagarajan]

On 4/11/2025 11:45 AM, Sarika Sharma wrote:
> Currently, the RX multicast broadcast packet check is performed using
> bit 15 from the info6 field of the MPDU start descriptor. This check
> can also be done using bit 9 from the info5 field of the MSDU end
> descriptor. However, in some scenarios multicast bit is not set when
> fetched from MPDU start descriptor.
> Therefore, checking the RX multicast broadcast packet from the MSDU
> end descriptor is more reliable as it is per MSDU.
> 
> Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1
> 
> Signed-off-by: Sarika Sharma <quic_sarishar@quicinc.com>

Reviewed-by: Vasanthakumar Thiagarajan <vasanthakumar.thiagarajan@oss.qualcomm.com>

[PATCH ath-next v2 2/2] wifi: ath12k: correctly handle mcast packets for clients

[Sarika Sharma]

Currently, RX is_mcbc bit is set for packest send from client as
destination address (DA) is multicast/broadcast address, but packets
are actually unicast as receiver address (RA) is not multicast address.
Hence, packets are not handled properly due to this is_mcbc bit.

Therefore, reset the is_mcbc bit if interface type is AP.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1

Signed-off-by: Sarika Sharma <quic_sarishar@quicinc.com>
---
 drivers/net/wireless/ath/ath12k/dp_rx.c | 5 +++++
 drivers/net/wireless/ath/ath12k/peer.c  | 5 ++++-
 drivers/net/wireless/ath/ath12k/peer.h  | 3 ++-
 3 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/ath/ath12k/dp_rx.c b/drivers/net/wireless/ath/ath12k/dp_rx.c
index cffff66c5ec4..308d9656b57e 100644
--- a/drivers/net/wireless/ath/ath12k/dp_rx.c
+++ b/drivers/net/wireless/ath/ath12k/dp_rx.c
@@ -2269,6 +2269,11 @@ static void ath12k_dp_rx_h_mpdu(struct ath12k *ar,
 	spin_lock_bh(&ar->ab->base_lock);
 	peer = ath12k_dp_rx_h_find_peer(ar->ab, msdu);
 	if (peer) {
+		/* resetting mcbc bit because mcbc packets are unicast
+		 * packets only for AP as STA sends unicast packets.
+		 */
+		rxcb->is_mcbc = rxcb->is_mcbc && !peer->ucast_ra_only;
+
 		if (rxcb->is_mcbc)
 			enctype = peer->sec_type_grp;
 		else
diff --git a/drivers/net/wireless/ath/ath12k/peer.c b/drivers/net/wireless/ath/ath12k/peer.c
index 792cca8a3fb1..ec7236bbccc0 100644
--- a/drivers/net/wireless/ath/ath12k/peer.c
+++ b/drivers/net/wireless/ath/ath12k/peer.c
@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: BSD-3-Clause-Clear
 /*
  * Copyright (c) 2018-2021 The Linux Foundation. All rights reserved.
- * Copyright (c) 2021-2022, 2024 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2021-2022, 2024-2025 Qualcomm Innovation Center, Inc. All rights reserved.
  */
 
 #include "core.h"
@@ -383,6 +383,9 @@ int ath12k_peer_create(struct ath12k *ar, struct ath12k_link_vif *arvif,
 		arvif->ast_idx = peer->hw_peer_id;
 	}
 
+	if (vif->type == NL80211_IFTYPE_AP)
+		peer->ucast_ra_only = true;
+
 	if (sta) {
 		ahsta = ath12k_sta_to_ahsta(sta);
 		arsta = wiphy_dereference(ath12k_ar_to_hw(ar)->wiphy,
diff --git a/drivers/net/wireless/ath/ath12k/peer.h b/drivers/net/wireless/ath/ath12k/peer.h
index 5870ee11a8c7..f3a5e054d2b5 100644
--- a/drivers/net/wireless/ath/ath12k/peer.h
+++ b/drivers/net/wireless/ath/ath12k/peer.h
@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: BSD-3-Clause-Clear */
 /*
  * Copyright (c) 2018-2021 The Linux Foundation. All rights reserved.
- * Copyright (c) 2021-2024 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2021-2025 Qualcomm Innovation Center, Inc. All rights reserved.
  */
 
 #ifndef ATH12K_PEER_H
@@ -62,6 +62,7 @@ struct ath12k_peer {
 
 	/* for reference to ath12k_link_sta */
 	u8 link_id;
+	bool ucast_ra_only;
 };
 
 struct ath12k_ml_peer {
-- 
2.34.1

Re: [PATCH ath-next v2 2/2] wifi: ath12k: correctly handle mcast packets for clients

[Vasanthakumar Thiagarajan]

On 4/11/2025 11:45 AM, Sarika Sharma wrote:
> Currently, RX is_mcbc bit is set for packest send from client as
> destination address (DA) is multicast/broadcast address, but packets
> are actually unicast as receiver address (RA) is not multicast address.
> Hence, packets are not handled properly due to this is_mcbc bit.
> 
> Therefore, reset the is_mcbc bit if interface type is AP.
> 
> Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1
> 
> Signed-off-by: Sarika Sharma <quic_sarishar@quicinc.com>

Should there be a fixes tag?

Re: [PATCH ath-next v2 2/2] wifi: ath12k: correctly handle mcast packets for clients

[Sarika Sharma]

On 4/11/2025 11:55 AM, Vasanthakumar Thiagarajan wrote:
> 
> 
> On 4/11/2025 11:45 AM, Sarika Sharma wrote:
>> Currently, RX is_mcbc bit is set for packest send from client as
>> destination address (DA) is multicast/broadcast address, but packets
>> are actually unicast as receiver address (RA) is not multicast address.
>> Hence, packets are not handled properly due to this is_mcbc bit.
>>
>> Therefore, reset the is_mcbc bit if interface type is AP.
>>
>> Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1
>>
>> Signed-off-by: Sarika Sharma <quic_sarishar@quicinc.com>
> 
> Should there be a fixes tag?

This patch independently does not fix any known issue, this is required 
because of patch 1 in the series. Due to 1st patch some existing issue 
is exposed, to address that 2nd patch is required.

Re: [PATCH ath-next v2 2/2] wifi: ath12k: correctly handle mcast packets for clients

[Vasanthakumar Thiagarajan]

On 4/11/2025 12:27 PM, Sarika Sharma wrote:
> On 4/11/2025 11:55 AM, Vasanthakumar Thiagarajan wrote:
>>
>>
>> On 4/11/2025 11:45 AM, Sarika Sharma wrote:
>>> Currently, RX is_mcbc bit is set for packest send from client as
>>> destination address (DA) is multicast/broadcast address, but packets
>>> are actually unicast as receiver address (RA) is not multicast address.
>>> Hence, packets are not handled properly due to this is_mcbc bit.
>>>
>>> Therefore, reset the is_mcbc bit if interface type is AP.
>>>
>>> Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1
>>>
>>> Signed-off-by: Sarika Sharma <quic_sarishar@quicinc.com>
>>
>> Should there be a fixes tag?
> 
> This patch independently does not fix any known issue, this is required because of patch 1 
> in the series. Due to 1st patch some existing issue is exposed, to address that 2nd patch 
> is required.
> 

Ok

Reviewed-by: Vasanthakumar Thiagarajan <vasanthakumar.thiagarajan@oss.qualcomm.com>

Re: [PATCH ath-next v2 2/2] wifi: ath12k: correctly handle mcast packets for clients

[Jeff Johnson]

On 4/10/2025 11:15 PM, Sarika Sharma wrote:
> Currently, RX is_mcbc bit is set for packest send from client as

In pending I modified: s/packest send/packets sent/

https://git.kernel.org/pub/scm/linux/kernel/git/ath/ath.git/commit/?h=pending&id=f2358d4e1724e40f8558d713cac36710dbbc8f37

Re: [PATCH ath-next v2 0/2] wifi: ath12k: correctly check RX multicast bit

[Jeff Johnson]

On Fri, 11 Apr 2025 11:45:21 +0530, Sarika Sharma wrote:
> Currently, the RX multicast broadcast bit is fetched from the MPDU
> start descriptor. However, in some scenarios, the value is not
> accurate. Therefore, changing the process to fetch the bit from the
> MSDU end descriptor for improved reliability.
> 
> Sarika Sharma (2):
>   wifi: ath12k: using msdu end descriptor to check for rx multicast
>     packets
>   wifi: ath12k: correctly handle mcast packets for clients
> 
> [...]

Applied, thanks!

[1/2] wifi: ath12k: using msdu end descriptor to check for rx multicast packets
      commit: cb7433cc5cd4d07175dbc41f5a19966e9fae48be
[2/2] wifi: ath12k: correctly handle mcast packets for clients
      commit: 4541b0c8c3c1b85564971d497224e57cf8076a02

Best regards,
-- 
Jeff Johnson <jeff.johnson@oss.qualcomm.com>