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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-23fa48fd29dsm33641435ad.176.2025.07.25.03.08.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 25 Jul 2025 03:08:25 -0700 (PDT) From: Jie Gan To: Suzuki K Poulose , Mike Leach , James Clark , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Bjorn Andersson , Konrad Dybcio , Alexander Shishkin , Tingwei Zhang , Jinlong Mao Cc: coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, Jie Gan Subject: [PATCH v4 03/10] coresight: tmc: add etr_buf_list to store allocated etr_buf Date: Fri, 25 Jul 2025 18:07:59 +0800 Message-Id: <20250725100806.1157-4-jie.gan@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250725100806.1157-1-jie.gan@oss.qualcomm.com> References: <20250725100806.1157-1-jie.gan@oss.qualcomm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Authority-Analysis: v=2.4 cv=NfTm13D4 c=1 sm=1 tr=0 ts=6883579b cx=c_pps a=JL+w9abYAAE89/QcEU+0QA==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=Wb1JkmetP80A:10 a=EUspDBNiAAAA:8 a=ORm1qb0EFYpRwVLUulEA:9 a=324X-CrmTo6CU4MGRt3R:22 X-Proofpoint-ORIG-GUID: NR2zia_0B0UYxZWSluYsJEYN3CpjSybr X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNzI1MDA4NSBTYWx0ZWRfXwa8AokiZIWJ4 EPJC/q/SAtWhyCI7zRmLH2Fk+gHBnSadlaskuSH5BTSJ8K9oDzmdWxAzDaPEKlDiCEtECDj7arg X6+hiHbDu0cCjOgZsBMWhaNETw79rtD7BCYNkAvm5WgExb4AVzgxKbvNcn7mPDcgWZXWCGX2Xq+ qxkTJybw4soDffzqP6XN6Ojf8YBWBA+YxIW3Cd3UwmaXlyA4V7mgCD8jdN1v+hPyJbA+cQV7FAv LgGD5slgKA5D8M5GghHCGoGINQ+lds22IJ2yESkOwanwwGbSwGg/7cgjnBiZahyhnI1iQw3JP9N KnlfEX6fQibncVyQVPJYDUZ3w41+neyRNHSdohcuLTP0OQffb4nsB/tDoCMF+b2iUxYFpNCpERM Leztm9Tr21N3HDuVPJ1n3MjDKYeJzSmCy28D/K/ET5zMVuVuXCc8H12wk/qiOnvb93OQT4dA X-Proofpoint-GUID: NR2zia_0B0UYxZWSluYsJEYN3CpjSybr X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-07-25_02,2025-07-24_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 adultscore=0 clxscore=1015 suspectscore=0 lowpriorityscore=0 bulkscore=0 spamscore=0 priorityscore=1501 phishscore=0 mlxscore=0 mlxlogscore=999 malwarescore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505280000 definitions=main-2507250085 Content-Type: text/plain; charset="utf-8" Add a list to store allocated etr_buf. The byte-cntr functionality requires two etr_buf to receive trace data. The active etr_buf collects the trace data from source device, while the byte-cntr reading function accesses the deactivated etr_buf after is has been filled and synced, transferring data to the userspace. Signed-off-by: Jie Gan --- .../hwtracing/coresight/coresight-tmc-core.c | 1 + drivers/hwtracing/coresight/coresight-tmc.h | 19 +++++++++++++++++++ 2 files changed, 20 insertions(+) diff --git a/drivers/hwtracing/coresight/coresight-tmc-core.c b/drivers/hwt= racing/coresight/coresight-tmc-core.c index be964656be93..4d249af93097 100644 --- a/drivers/hwtracing/coresight/coresight-tmc-core.c +++ b/drivers/hwtracing/coresight/coresight-tmc-core.c @@ -830,6 +830,7 @@ static int __tmc_probe(struct device *dev, struct resou= rce *res) idr_init(&drvdata->idr); mutex_init(&drvdata->idr_mutex); dev_list =3D &etr_devs; + INIT_LIST_HEAD(&drvdata->etr_buf_list); break; case TMC_CONFIG_TYPE_ETF: desc.groups =3D coresight_etf_groups; diff --git a/drivers/hwtracing/coresight/coresight-tmc.h b/drivers/hwtracin= g/coresight/coresight-tmc.h index 6541a27a018e..52ee5f8efe8c 100644 --- a/drivers/hwtracing/coresight/coresight-tmc.h +++ b/drivers/hwtracing/coresight/coresight-tmc.h @@ -208,6 +208,21 @@ struct tmc_resrv_buf { s64 len; }; =20 +/** + * @sysfs_buf: Allocated sysfs_buf. + * @is_free: Indicates whether the buffer is free to choose. + * @reading: Indicates whether the buffer is reading. + * @pos: Position of the buffer. + * @node: Node in etr_buf_list. + */ +struct etr_buf_node { + struct etr_buf *sysfs_buf; + bool is_free; + bool reading; + loff_t pos; + struct list_head node; +}; + /** * struct tmc_drvdata - specifics associated to an TMC component * @pclk: APB clock if present, otherwise NULL @@ -242,6 +257,8 @@ struct tmc_resrv_buf { * (after crash) by default. * @crash_mdata: Reserved memory for storing tmc crash metadata. * Used by ETR/ETF. + * @etr_buf_list: List that is used to manage allocated etr_buf. + * @reading_node: Available buffer for byte-cntr reading. */ struct tmc_drvdata { struct clk *pclk; @@ -271,6 +288,8 @@ struct tmc_drvdata { struct etr_buf *perf_buf; struct tmc_resrv_buf resrv_buf; struct tmc_resrv_buf crash_mdata; + struct list_head etr_buf_list; + struct etr_buf_node *reading_node; }; =20 struct etr_buf_operations { --=20 2.34.1