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[103.229.18.19]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3926254ee45sm12797317a91.2.2026.08.10.07.44.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 10 Aug 2026 07:44:58 -0700 (PDT) From: Pardeep Kaur X-Google-Original-From: Pardeep Kaur , Pardeep Kaur Subject: [PATCH ath-next v3 3/8] wifi: ath12k: add TCL ring TX buffer allocation failure counter Date: Mon, 10 Aug 2026 20:14:39 +0530 Message-Id: <20260810144444.2033607-4-pardeep.kaur@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260810144444.2033607-1-pardeep.kaur@oss.qualcomm.com> References: <20260810144444.2033607-1-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-ORIG-GUID: I8JNhTjziEcH-mM19iSgI6Oi-6vWUAhc X-Authority-Analysis: v=2.4 cv=R4cz39RX c=1 sm=1 tr=0 ts=6a79e3ec cx=c_pps a=RP+M6JBNLl+fLTcSJhASfg==:117 a=Ou0eQOY4+eZoSc0qltEV5Q==:17 a=Sv0fKeRqtYgA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_glEPmIy2e8OvE2BGh3C:22 a=EUspDBNiAAAA:8 a=vo2QL9yUnAtzEB9pKL0A:9 a=iS9zxrgQBfv6-_F4QbHw:22 X-Proofpoint-GUID: I8JNhTjziEcH-mM19iSgI6Oi-6vWUAhc X-Proofpoint-Spam-Info: AW1haW4tMjYwODEwMDEyNiBTYWx0ZWRfX4TifTFoH/KAh moIbh3FEGz+q9k67Jza6IpzJjlOvzChrXNrCzg8ULEW2y8uhf87RVI03EKjpIZKUnkHNei8MpAk E3xvy3qH3DEiXQlQXRBw9hs5Rh92bLs= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODEwMDEyNiBTYWx0ZWRfX0pGlC/IPTAJc 4QpOfd1yl3nmKe/3p8vxtN1wCxm0UV92XSBN4N6hc66SRhDcWEtWTVKBM+bES3ynP3LztA6gFZJ zEpCt4FfNbCF1jRxG5sbskPhEY1hY9C2b1nSYBQL3Z+DH3WL+yy8k+6tCg0kpZChvmtwmXhNbcB hzJbelmIkidQb+eDRNU7l1S3IyQnCE5exNB+9aCMI51n2l9fIaBrpbwCyXNN/7YctPQDXt4C7QU LeBiSp8aMcuev7ZZ3SSJrHA2POx1rH5vwpray0ZMMFx1o/WzOQ+81uYWXOMN6QR8eBeEslLGz9z ngW43enK7Z4R9+mgJFZSRnUx7peAP0ooUFpM5Jrh+xpAVRlgAwgWenLI2XT5n6hIrnUE3/gtuIX iO4eUrUCHgI9+J2DQCNPTu6UdAo/9Grk+eMGYfzP+97y6NntQvBrShbakypRURlleptNg2XHp6v O/nZGZNiuwz0ZpQSdig== 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=2026-08-10_03,2026-08-07_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 adultscore=0 malwarescore=0 priorityscore=1501 bulkscore=0 suspectscore=0 clxscore=1015 lowpriorityscore=0 impostorscore=0 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608100126 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 a8afc1cb0712..11048c568331 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