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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-23fa48fd29dsm33641435ad.176.2025.07.25.03.08.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 25 Jul 2025 03:08:49 -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 08/10] coresight: add a new function in helper_ops Date: Fri, 25 Jul 2025 18:08:04 +0800 Message-Id: <20250725100806.1157-9-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-Proofpoint-ORIG-GUID: AisGdSvUuKa-7bn6xk-xLm6WQZGeq8V4 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNzI1MDA4NSBTYWx0ZWRfXzDFfEH+1T29e rfsGKJwFh4h8KYicxGFfiMDNx9X5wj4DrsD6j3PT9gXApHlch2Wg8iSArq5lZdz/O/2Le5uJrCw UajxDyIQSFFjUrLAZBp6YglYENPUONZXRZKinVjqwt/8tYlSD+TfS3meJnRsctvGhoyJkB6qmkG lrl0eZxAFKoVd00zXaYesycZO++bU0wgqPcibtpU948d6/PPOvd+6CROj2HobK5201ejLxmU8bv h8AJMApzkQBPv8BNA7xIYvrQGI+HhBmqAt0zBIegBJ2EVk2oXhtfZEhwO7/jmmtv/ecEZ4QdlN0 qOpBUBi6jzZNhTEusVECa6j5RCYExWWV4HSIo/94qGupn1eYg/YJFnn7+1B/li4tAV0s4Pwt0np WWG9eeig4mHHl0ZghAY5O5UfkwEcfhgMygjrdBoz2srJubZBRNZhHF6fphKRmvlNOZ0nDtDp X-Proofpoint-GUID: AisGdSvUuKa-7bn6xk-xLm6WQZGeq8V4 X-Authority-Analysis: v=2.4 cv=S8bZwJsP c=1 sm=1 tr=0 ts=688357b4 cx=c_pps a=cmESyDAEBpBGqyK7t0alAg==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=Wb1JkmetP80A:10 a=EUspDBNiAAAA:8 a=vagHEfzm_U2ljPniXDUA:9 a=0bXxn9q0MV6snEgNplNhOjQmxlI=:19 a=1OuFwYUASf3TG4hYMiVC:22 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 clxscore=1015 lowpriorityscore=0 mlxlogscore=999 bulkscore=0 impostorscore=0 spamscore=0 malwarescore=0 adultscore=0 suspectscore=0 phishscore=0 priorityscore=1501 mlxscore=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 new function to identifiy whether the byte-cntr function is enabled or not in helper_ops. The byte-cntr's read_ops is expected if the byte-cntr is enabled when the user try to read trace data via sysfs node. Signed-off-by: Jie Gan --- .../hwtracing/coresight/coresight-ctcu-core.c | 35 +++++++++++++++++++ include/linux/coresight.h | 3 ++ 2 files changed, 38 insertions(+) diff --git a/drivers/hwtracing/coresight/coresight-ctcu-core.c b/drivers/hw= tracing/coresight/coresight-ctcu-core.c index 8fc08e42187e..dec911980939 100644 --- a/drivers/hwtracing/coresight/coresight-ctcu-core.c +++ b/drivers/hwtracing/coresight/coresight-ctcu-core.c @@ -234,9 +234,44 @@ static int ctcu_disable(struct coresight_device *csdev= , void *data) return ctcu_set_etr_traceid(csdev, path, false); } =20 +static bool ctcu_qcom_byte_cntr_in_use(struct coresight_device *csdev, + void **data) +{ + struct ctcu_byte_cntr *byte_cntr_data; + struct coresight_device *helper; + struct ctcu_drvdata *drvdata; + int port; + + if (!csdev) + return false; + + helper =3D coresight_get_helper(csdev, CORESIGHT_DEV_SUBTYPE_HELPER_CTCU); + if (!helper) + return false; + + port =3D coresight_get_in_port_dest(csdev, helper); + if (port < 0) + return false; + + drvdata =3D dev_get_drvdata(helper->dev.parent); + /* Something wrong when initialize byte_cntr_read_ops */ + if (!drvdata->byte_cntr_read_ops) + return false; + + byte_cntr_data =3D &drvdata->byte_cntr_data[port]; + /* Return the pointer of the ctcu_drvdata if byte-cntr has enabled */ + if (byte_cntr_data && byte_cntr_data->thresh_val) { + *data =3D (void *)drvdata->byte_cntr_read_ops; + return true; + } + + return false; +} + static const struct coresight_ops_helper ctcu_helper_ops =3D { .enable =3D ctcu_enable, .disable =3D ctcu_disable, + .qcom_byte_cntr_in_use =3D ctcu_qcom_byte_cntr_in_use, }; =20 static const struct coresight_ops ctcu_ops =3D { diff --git a/include/linux/coresight.h b/include/linux/coresight.h index 4ac65c68bbf4..b5f052854b08 100644 --- a/include/linux/coresight.h +++ b/include/linux/coresight.h @@ -419,11 +419,14 @@ struct coresight_ops_source { * * @enable : Enable the device * @disable : Disable the device + * @qcom_byte_cntr_in_use: check whether the byte-cntr is enabled. */ struct coresight_ops_helper { int (*enable)(struct coresight_device *csdev, enum cs_mode mode, void *data); int (*disable)(struct coresight_device *csdev, void *data); + bool (*qcom_byte_cntr_in_use)(struct coresight_device *csdev, + void **data); }; =20 =20 --=20 2.34.1