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[103.229.18.19]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-39085db4a6csm1469079a91.3.2026.08.06.05.09.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Aug 2026 05:09:50 -0700 (PDT) From: Pardeep Kaur X-Google-Original-From: Pardeep Kaur , Pardeep Kaur Subject: [PATCH ath-next v2 3/8] wifi: ath12k: add TCL ring TX buffer allocation failure counter Date: Thu, 6 Aug 2026 17:39:22 +0530 Message-Id: <20260806120927.3607733-4-pardeep.kaur@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260806120927.3607733-1-pardeep.kaur@oss.qualcomm.com> References: <20260806120927.3607733-1-pardeep.kaur@oss.qualcomm.com> Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-Spam-Info: AW1haW4tMjYwODA2MDA5NSBTYWx0ZWRfX4QL9GD4gbb40 NH291txOhFYbr8fz+G2a4ckdhWXfB8ZxVfuqoSby56ksQzi20uK7Jjlv3DbTyRkKH8plX1PgcqG +1QN3S1DeSB2yqNgYVOb47K1IyYjWDQ= X-Authority-Analysis: v=2.4 cv=WbY8rUhX c=1 sm=1 tr=0 ts=6a747991 cx=c_pps a=UNFcQwm+pnOIJct1K4W+Mw==:117 a=Ou0eQOY4+eZoSc0qltEV5Q==:17 a=Sv0fKeRqtYgA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=eoimf2acIAo5FJnRuUoq:22 a=EUspDBNiAAAA:8 a=vo2QL9yUnAtzEB9pKL0A:9 a=uKXjsCUrEbL0IQVhDsJ9:22 X-Proofpoint-ORIG-GUID: jdSTe7oDvh5r1K30WC_E6ddVgtsy5J14 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODA2MDA5NSBTYWx0ZWRfX57rOCgwdaqdw O09Y75RWuIml5cH8Wt8jaCnhwZnMqVkAl8WNT0opVqbALSss8SR+aTSi5uDUF2bWh1MMvHPoVCd HoZoofl/KfKzrv2eF6+hZVsjR1g1Z46JxJc60GzwgEcsYhNdVliqKBiBxSdUsh2yiWkG525fj+8 aWPhHO3YMtajO61fnwDN5czKMOTf/Y+CAqCHfzVBMZNGONk2nYxAyZ2aaEYXxItYErPikQGA6Ck c7pH6ckDaWQgCsnDx23OKxHVLuxxGd6FgfCQCLVUieq50N5jK6u3ydQLJ2D7zU3loKlzY8Bd4DQ uCoXux2PbA2JG5V1auHz4R/Fhcu3hk3nC+h3QAaXluvjOtEoSzItjuVMwnYyRhP16vhb0HZYftc 7jH/84zXfcRjoq5wIVyjZPoeV16cqX4iWx0dVL/vQ+UJWgeVeUwNLnLmw0pKVBwOrBPsDRXMRx/ E4OqtOJIVIJD6x7pnHg== X-Proofpoint-GUID: jdSTe7oDvh5r1K30WC_E6ddVgtsy5J14 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-08-05_06,2026-08-05_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 adultscore=0 suspectscore=0 malwarescore=0 lowpriorityscore=0 bulkscore=0 clxscore=1015 spamscore=0 phishscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608060095 From: Hariharan Ramanathan When ath12k_dp_tx_assign_buffer() fails, the TX path returns -ENOMEM silently with no visibility into which traffic class is affected. Without a counter, TX descriptor pool exhaustion is invisible during debugging. Add txbuf_na[] indexed by pool_id to ath12k_device_dp_tx_err_stats to track TX descriptor pool allocation failures per traffic class and increment it on assign failure in the TX path. Expose the per-pool counts in debugfs under a new 'TX Descriptor Pool Alloc Failures' section. Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.6.r1-00402-QCAHKSWPL_SILICONZ-1 Signed-off-by: Hariharan Ramanathan Co-developed-by: Pardeep Kaur Signed-off-by: Pardeep Kaur --- drivers/net/wireless/ath/ath12k/debugfs.c | 5 +++++ drivers/net/wireless/ath/ath12k/dp.h | 2 ++ drivers/net/wireless/ath/ath12k/wifi7/dp_tx.c | 4 +++- 3 files changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/ath12k/debugfs.c b/drivers/net/wireless/ath/ath12k/debugfs.c index d54995b7adb2..ec49692107a8 100644 --- a/drivers/net/wireless/ath/ath12k/debugfs.c +++ b/drivers/net/wireless/ath/ath12k/debugfs.c @@ -1117,6 +1117,11 @@ static ssize_t ath12k_debugfs_dump_device_dp_stats(struct file *file, len += scnprintf(buf + len, size - len, "ring%d: %u\n", i, device_stats->tx_err.desc_na[i]); + len += scnprintf(buf + len, size - len, "\nTX Descriptor Pool Alloc Failures:\n"); + for (i = 0; i < ATH12K_HW_MAX_QUEUES; i++) + len += scnprintf(buf + len, size - len, "pool%d: %u\n", + i, device_stats->tx_err.txbuf_na[i]); + len += scnprintf(buf + len, size - len, "\nMisc Transmit Failures: %d\n", atomic_read(&device_stats->tx_err.misc_fail)); diff --git a/drivers/net/wireless/ath/ath12k/dp.h b/drivers/net/wireless/ath/ath12k/dp.h index bef0f2ba0560..16675210806a 100644 --- a/drivers/net/wireless/ath/ath12k/dp.h +++ b/drivers/net/wireless/ath/ath12k/dp.h @@ -429,6 +429,8 @@ struct ath12k_dp_arch_ops { struct ath12k_device_dp_tx_err_stats { /* TCL Ring Descriptor unavailable */ u32 desc_na[DP_TCL_NUM_RING_MAX]; + /* TX descriptor pool exhausted (per pool_id / traffic class) */ + u32 txbuf_na[ATH12K_HW_MAX_QUEUES]; /* Other failures during dp_tx due to mem allocation failure * idr unavailable etc. */ diff --git a/drivers/net/wireless/ath/ath12k/wifi7/dp_tx.c b/drivers/net/wireless/ath/ath12k/wifi7/dp_tx.c index d46a3d14f018..f572aa581d11 100644 --- a/drivers/net/wireless/ath/ath12k/wifi7/dp_tx.c +++ b/drivers/net/wireless/ath/ath12k/wifi7/dp_tx.c @@ -167,8 +167,10 @@ int ath12k_wifi7_dp_tx(struct ath12k_pdev_dp *dp_pdev, struct ath12k_link_vif *a tx_ring = &dp->tx_ring[ti.ring_id]; tx_desc = ath12k_dp_tx_assign_buffer(dp, pool_id); - if (!tx_desc) + if (!tx_desc) { + dp->device_stats.tx_err.txbuf_na[pool_id]++; return -ENOMEM; + } dp_link_vif = ath12k_dp_vif_to_dp_link_vif(&ahvif->dp_vif, arvif->link_id); -- 2.34.1