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[103.229.18.19]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3957f4c9918sm404261a91.0.2026.08.18.22.33.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 18 Aug 2026 22:33:08 -0700 (PDT) From: Pardeep Kaur X-Google-Original-From: Pardeep Kaur , Pardeep Kaur Subject: [PATCH ath-next v4 3/8] wifi: ath12k: add TCL ring TX buffer allocation failure counter Date: Wed, 19 Aug 2026 11:02:42 +0530 Message-Id: <20260819053247.1420393-4-pardeep.kaur@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260819053247.1420393-1-pardeep.kaur@oss.qualcomm.com> References: <20260819053247.1420393-1-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-GUID: JRt_ZsLwYvbfCgW3kkVsC8uiPjibEYRm X-Authority-Analysis: v=2.4 cv=bth8wkai c=1 sm=1 tr=0 ts=6a854016 cx=c_pps a=oF/VQ+ItUULfLr/lQ2/icg==:117 a=Ou0eQOY4+eZoSc0qltEV5Q==:17 a=Sv0fKeRqtYgA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=DJpcGTmdVt4CTyJn9g5Z:22 a=EUspDBNiAAAA:8 a=vo2QL9yUnAtzEB9pKL0A:9 a=3WC7DwWrALyhR5TkjVHa:22 X-Proofpoint-ORIG-GUID: JRt_ZsLwYvbfCgW3kkVsC8uiPjibEYRm X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODE5MDAzOSBTYWx0ZWRfX0fMUR1UV5ZRX khTrfhqvYrXQT7TKPHcEHsLvRFp8Wqlf81ZGLo8wTNgPiTz/sGA8X4M4hsAORKQ4PN/fPRXbRvP FuLGbDDEXi4Dlc0kjwZZKdxPAdEbNQegJ2nV1VtPN2z98y/mGcTMYY5E54st5jY2BzITJ5ES9Ql SRfx4EcBXQRPrUDeWdC+wJp4BGdN+ezcm2Vy3pyzVW80jUVx2vuzrCaeJFuhUN2S1G6V0pab9nZ AggcRCkRof6ZLIKo61EvXgnSEBqWdX/5EMq4MSza85S3SxiNGlgCYtLG+SvMOJc1O3Ja/dBqQaw PksIentTUQxFFDGI+hLcP0vgCkyqZ/i7cknBOVZ+LveRAfMyCyWStNFVdRM5d/NSW9Gu0mP2w+h DClYO5bpJM88GZZYMBGEYWErdrJeec/NEJtUvMb2xmD/2Psubf/K97IAPZfUhcr7i1SPTO7AR21 WRiVHfZkmTMrQBXOsnQ== X-Proofpoint-Spam-Info: AW1haW4tMjYwODE5MDAzOSBTYWx0ZWRfX52x6XT+2E5G5 lCG0PgKt/YjGVnD86GRwl7UittJqhS8/a8o8xCsCoDSLeo/8b/O0Zx2L2XrptTK9RMK57hsjRCw NFjGNJdDtQ2HIV3mdcL3NTfJHDvVIAg= 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=2026-08-19_01,2026-08-18_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 bulkscore=0 suspectscore=0 spamscore=0 phishscore=0 impostorscore=0 lowpriorityscore=0 adultscore=0 priorityscore=1501 clxscore=1015 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608190039 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