Received-SPF: pass (google.com: domain of linux-wireless+bounces-6605-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45d1:ec00::1 as permitted sender) client-ip=2604:1380:45d1:ec00::1;
From: Karthikeyan Kathirvel <quic_kathirve@quicinc.com>
To: <ath12k@lists.infradead.org>
CC: <linux-wireless@vger.kernel.org>,
        Karthikeyan Kathirvel
	<quic_kathirve@quicinc.com>
Subject: [PATCH v2] wifi: ath12k: drop failed transmitted frames from metric calculation.
Date: Sun, 21 Apr 2024 23:06:59 +0530
Message-ID: <20240421173659.53674-1-quic_kathirve@quicinc.com>
Precedence: bulk
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Content-Type: text/plain

In mesh node traffic, internal firmware-transmitted failures are
reported as transmitted failures in mesh metric calculation, leading
to the breakage of the mesh link.

Fix the issue by dropping the internal firmware-transmitted failures
before updating the TX completion status to mac80211, in order to
prevent false failure averaging in mesh metric calculation.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-QCAHKSWPL_SILICONZ-1

Fixes: d889913205cf ("wifi: ath12k: driver for Qualcomm Wi-Fi 7 devices")
Signed-off-by: Karthikeyan Kathirvel <quic_kathirve@quicinc.com>
---
v2:
	Addressed Jeff's review comments
		- Updated copyrights of hal_desc.h to 2024
		- nits addressed
---
 drivers/net/wireless/ath/ath12k/dp_tx.c    | 38 ++++++++++++++++------
 drivers/net/wireless/ath/ath12k/hal_desc.h | 22 ++++++++++++-
 2 files changed, 49 insertions(+), 11 deletions(-)

diff --git a/drivers/net/wireless/ath/ath12k/dp_tx.c b/drivers/net/wireless/ath/ath12k/dp_tx.c
index 9b6d7d72f57c..423afdad98e3 100644
--- a/drivers/net/wireless/ath/ath12k/dp_tx.c
+++ b/drivers/net/wireless/ath/ath12k/dp_tx.c
@@ -481,18 +481,36 @@ static void ath12k_dp_tx_complete_msdu(struct ath12k *ar,
 	/* skip tx rate update from ieee80211_status*/
 	info->status.rates[0].idx = -1;
 
-	if (ts->status == HAL_WBM_TQM_REL_REASON_FRAME_ACKED &&
-	    !(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
-		info->flags |= IEEE80211_TX_STAT_ACK;
-		info->status.ack_signal = ATH12K_DEFAULT_NOISE_FLOOR +
-					  ts->ack_rssi;
-		info->status.flags = IEEE80211_TX_STATUS_ACK_SIGNAL_VALID;
+	switch (ts->status) {
+	case HAL_WBM_TQM_REL_REASON_FRAME_ACKED:
+		if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
+			info->flags |= IEEE80211_TX_STAT_ACK;
+			info->status.ack_signal = ATH12K_DEFAULT_NOISE_FLOOR +
+						  ts->ack_rssi;
+			info->status.flags = IEEE80211_TX_STATUS_ACK_SIGNAL_VALID;
+		}
+		break;
+	case HAL_WBM_TQM_REL_REASON_CMD_REMOVE_TX:
+		if (info->flags & IEEE80211_TX_CTL_NO_ACK) {
+			info->flags |= IEEE80211_TX_STAT_NOACK_TRANSMITTED;
+			break;
+		}
+		fallthrough;
+	case HAL_WBM_TQM_REL_REASON_CMD_REMOVE_MPDU:
+	case HAL_WBM_TQM_REL_REASON_DROP_THRESHOLD:
+	case HAL_WBM_TQM_REL_REASON_CMD_REMOVE_AGED_FRAMES:
+		/* The failure status is due to internal firmware tx failure
+		 * hence drop the frame; do not update the status of frame to
+		 * the upper layer
+		 */
+		dev_kfree_skb_any(msdu);
+		goto exit;
+	default:
+		ath12k_dbg(ab, ATH12K_DBG_DP_TX, "tx frame is not acked status %d\n",
+			   ts->status);
+		break;
 	}
 
-	if (ts->status == HAL_WBM_TQM_REL_REASON_CMD_REMOVE_TX &&
-	    (info->flags & IEEE80211_TX_CTL_NO_ACK))
-		info->flags |= IEEE80211_TX_STAT_NOACK_TRANSMITTED;
-
 	/* NOTE: Tx rate status reporting. Tx completion status does not have
 	 * necessary information (for example nss) to build the tx rate.
 	 * Might end up reporting it out-of-band from HTT stats.
diff --git a/drivers/net/wireless/ath/ath12k/hal_desc.h b/drivers/net/wireless/ath/ath12k/hal_desc.h
index 63340256d3f6..71e8c8a091ae 100644
--- a/drivers/net/wireless/ath/ath12k/hal_desc.h
+++ b/drivers/net/wireless/ath/ath12k/hal_desc.h
@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: BSD-3-Clause-Clear */
 /*
  * Copyright (c) 2018-2021 The Linux Foundation. All rights reserved.
- * Copyright (c) 2021-2022 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2021-2024 Qualcomm Innovation Center, Inc. All rights reserved.
  */
 #include "core.h"
 
@@ -2048,6 +2048,19 @@ struct hal_wbm_release_ring {
  *	fw with fw_reason2.
  * @HAL_WBM_TQM_REL_REASON_CMD_REMOVE_RESEAON3: Remove command initiated by
  *	fw with fw_reason3.
+ * @HAL_WBM_TQM_REL_REASON_CMD_DISABLE_QUEUE: Remove command initiated by
+ *	fw with disable queue.
+ * @HAL_WBM_TQM_REL_REASON_CMD_TILL_NONMATCHING: Remove command initiated by
+ *	fw to remove all mpdu until 1st non-match.
+ * @HAL_WBM_TQM_REL_REASON_DROP_THRESHOLD: Dropped due to drop threshold
+ *	criteria
+ * @HAL_WBM_TQM_REL_REASON_DROP_LINK_DESC_UNAVAIL: Dropped due to link desc
+ *	not available
+ * @HAL_WBM_TQM_REL_REASON_DROP_OR_INVALID_MSDU: Dropped due drop bit set or
+ *	null flow
+ * @HAL_WBM_TQM_REL_REASON_MULTICAST_DROP: Dropped due mcast drop set for VDEV
+ * @HAL_WBM_TQM_REL_REASON_VDEV_MISMATCH_DROP: Dropped due to being set with
+ *	'TCL_drop_reason'
  */
 enum hal_wbm_tqm_rel_reason {
 	HAL_WBM_TQM_REL_REASON_FRAME_ACKED,
@@ -2058,6 +2071,13 @@ enum hal_wbm_tqm_rel_reason {
 	HAL_WBM_TQM_REL_REASON_CMD_REMOVE_RESEAON1,
 	HAL_WBM_TQM_REL_REASON_CMD_REMOVE_RESEAON2,
 	HAL_WBM_TQM_REL_REASON_CMD_REMOVE_RESEAON3,
+	HAL_WBM_TQM_REL_REASON_CMD_DISABLE_QUEUE,
+	HAL_WBM_TQM_REL_REASON_CMD_TILL_NONMATCHING,
+	HAL_WBM_TQM_REL_REASON_DROP_THRESHOLD,
+	HAL_WBM_TQM_REL_REASON_DROP_LINK_DESC_UNAVAIL,
+	HAL_WBM_TQM_REL_REASON_DROP_OR_INVALID_MSDU,
+	HAL_WBM_TQM_REL_REASON_MULTICAST_DROP,
+	HAL_WBM_TQM_REL_REASON_VDEV_MISMATCH_DROP,
 };
 
 struct hal_wbm_buffer_ring {

base-commit: 363e7193eaf258fe7f04e8db560bd8a282a12cd9
-- 
2.34.1