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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2a2f3c666d5sm148418095ad.21.2025.12.24.01.07.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 24 Dec 2025 01:07:34 -0800 (PST) From: Jie Gan Date: Wed, 24 Dec 2025 17:06:17 +0800 Subject: [PATCH v9 7/8] coresight: tmc: integrate byte-cntr's read_ops with sysfs file_ops Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20251224-enable-byte-cntr-for-ctcu-v9-7-886c4496fed4@oss.qualcomm.com> References: <20251224-enable-byte-cntr-for-ctcu-v9-0-886c4496fed4@oss.qualcomm.com> In-Reply-To: <20251224-enable-byte-cntr-for-ctcu-v9-0-886c4496fed4@oss.qualcomm.com> To: Suzuki K Poulose , Mike Leach , James Clark , Alexander Shishkin , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Tingwei Zhang , Mao Jinlong , Bjorn Andersson , Konrad Dybcio 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 X-Mailer: b4 0.14.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1766567216; l=3605; i=jie.gan@oss.qualcomm.com; s=20250909; h=from:subject:message-id; bh=Oy7z+jq/TjNetJ2Zgz+w8FIQKCJz069QL66/p8AMAm8=; b=uSaM/v/6IGPwFdUgM27elSIz+7592+G9joqAqMykPDiujN0xGFIL3I8ImHLoA3zeBynz6jEHP S7phaA0hB1fDJ0se5c+j5hyfyFqHefa53uPF5zL3nq8KKJlDnROnRz8 X-Developer-Key: i=jie.gan@oss.qualcomm.com; a=ed25519; pk=3LxxUZRPCNkvPDlWOvXfJNqNO4SfGdy3eghMb8puHuk= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMjI0MDA3OCBTYWx0ZWRfX9w36rWLFskYr 81W3BdwpBPZQ2BIYIaGbOfBJAVz7lUgSPOoEFJ3FKzhHKyG0GIHP7oASzLn+jkYJjkWawrKxNvh 74dedd9beKTTdE50tGcthtpJA9rCiBFOwtqSHD1Ue9eTSAdaY2BWuUqaQStyIcK3+Qr9Q7JBvR0 xEj5C/EuFiW5+hUtnfa0y0TaE4V+717+UDQ9P94brd6TD041Ib3wWSZFPEOCuMYQPzISAS3A0XD eoaGUMWm4HSJ3/yn3m2HkvSEviecTgIJYILNT/DSVqW/235TsNd65BBFMYhQnmf7u0/0iKFOPmX KYPxPG7tva3yPOvyzjyUCXiOEZLDt26mRYGTiisABBmzQ1bDjHTvpgYGnOgMTII9emNwaU6wK77 8jb7OF6lqLDxWja2msbnMkb0XUATa55+LUJoHL2Q35jZ80/25NvI0XGvysfQOAPfKaDc2dI2r0L LLcVtHSNLkPJND5TXYQ== X-Proofpoint-ORIG-GUID: 9XW4G4cunmEQwl59Pxp_dbZsriCQjd7B X-Authority-Analysis: v=2.4 cv=WegBqkhX c=1 sm=1 tr=0 ts=694bad57 cx=c_pps a=MTSHoo12Qbhz2p7MsH1ifg==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=IkcTkHD0fZMA:10 a=wP3pNCr1ah4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=EUspDBNiAAAA:8 a=i2GxayCjj04of9N-vEoA:9 a=+jEqtf1s3R9VXZ0wqowq2kgwd+I=:19 a=QEXdDO2ut3YA:10 a=GvdueXVYPmCkWapjIL-Q:22 X-Proofpoint-GUID: 9XW4G4cunmEQwl59Pxp_dbZsriCQjd7B X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-12-24_02,2025-12-22_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 impostorscore=0 bulkscore=0 adultscore=0 spamscore=0 phishscore=0 lowpriorityscore=0 suspectscore=0 clxscore=1015 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2512120000 definitions=main-2512240078 Add code logic to invoke byte-cntr's sysfs_read_ops if the byte-cntr is enabled. Signed-off-by: Jie Gan --- drivers/hwtracing/coresight/coresight-tmc-core.c | 53 ++++++++++++++++++++= +++- 1 file changed, 52 insertions(+), 1 deletion(-) diff --git a/drivers/hwtracing/coresight/coresight-tmc-core.c b/drivers/hwt= racing/coresight/coresight-tmc-core.c index 8b0397a77e57..5e74f33f6a23 100644 --- a/drivers/hwtracing/coresight/coresight-tmc-core.c +++ b/drivers/hwtracing/coresight/coresight-tmc-core.c @@ -31,6 +31,7 @@ =20 #include "coresight-priv.h" #include "coresight-tmc.h" +#include "coresight-ctcu.h" =20 DEFINE_CORESIGHT_DEVLIST(etb_devs, "tmc_etb"); DEFINE_CORESIGHT_DEVLIST(etf_devs, "tmc_etf"); @@ -228,15 +229,47 @@ static int tmc_prepare_crashdata(struct tmc_drvdata *= drvdata) return 0; } =20 +/* Return the byte-cntr's sysfs_read_ops if in use */ +static const struct sysfs_read_ops *tmc_get_byte_cntr_sysfs_ops(struct tmc= _drvdata *drvdata) +{ + struct ctcu_byte_cntr *byte_cntr_data; + struct ctcu_drvdata *ctcu_drvdata; + struct coresight_device *helper; + int port; + + helper =3D tmc_etr_get_helper_device(drvdata, CORESIGHT_DEV_SUBTYPE_HELPE= R_CTCU); + if (!helper) + return NULL; + + port =3D coresight_get_in_port(drvdata->csdev, helper); + if (port < 0) + return NULL; + + ctcu_drvdata =3D dev_get_drvdata(helper->dev.parent); + byte_cntr_data =3D &ctcu_drvdata->byte_cntr_data[port]; + if (byte_cntr_data && byte_cntr_data->thresh_val) + return ctcu_drvdata->byte_cntr_sysfs_read_ops; + + return NULL; +} + static int tmc_read_prepare(struct tmc_drvdata *drvdata) { + const struct sysfs_read_ops *byte_cntr_sysfs_read_ops; int ret =3D 0; =20 + byte_cntr_sysfs_read_ops =3D tmc_get_byte_cntr_sysfs_ops(drvdata); + if (byte_cntr_sysfs_read_ops) { + ret =3D byte_cntr_sysfs_read_ops->read_prepare(drvdata); + goto out; + } + if (drvdata->sysfs_ops) ret =3D drvdata->sysfs_ops->read_prepare(drvdata); else ret =3D -EINVAL; =20 +out: if (!ret) dev_dbg(&drvdata->csdev->dev, "TMC read start\n"); =20 @@ -245,13 +278,21 @@ static int tmc_read_prepare(struct tmc_drvdata *drvda= ta) =20 static int tmc_read_unprepare(struct tmc_drvdata *drvdata) { + const struct sysfs_read_ops *byte_cntr_sysfs_read_ops; int ret =3D 0; =20 + byte_cntr_sysfs_read_ops =3D tmc_get_byte_cntr_sysfs_ops(drvdata); + if (byte_cntr_sysfs_read_ops) { + ret =3D byte_cntr_sysfs_read_ops->read_unprepare(drvdata); + goto out; + } + if (drvdata->sysfs_ops) ret =3D drvdata->sysfs_ops->read_unprepare(drvdata); else ret =3D -EINVAL; =20 +out: if (!ret) dev_dbg(&drvdata->csdev->dev, "TMC read end\n"); =20 @@ -277,6 +318,12 @@ static int tmc_open(struct inode *inode, struct file *= file) static ssize_t tmc_get_sysfs_trace(struct tmc_drvdata *drvdata, loff_t pos= , size_t len, char **bufpp) { + const struct sysfs_read_ops *byte_cntr_sysfs_read_ops; + + byte_cntr_sysfs_read_ops =3D tmc_get_byte_cntr_sysfs_ops(drvdata); + if (byte_cntr_sysfs_read_ops) + return byte_cntr_sysfs_read_ops->get_trace_data(drvdata, pos, len, bufpp= ); + if (drvdata->sysfs_ops) return drvdata->sysfs_ops->get_trace_data(drvdata, pos, len, bufpp); =20 @@ -300,7 +347,11 @@ static ssize_t tmc_read(struct file *file, char __user= *data, size_t len, return -EFAULT; } =20 - *ppos +=3D actual; + if (drvdata->reading_node) + drvdata->reading_node->pos +=3D actual; + else + *ppos +=3D actual; + dev_dbg(&drvdata->csdev->dev, "%zu bytes copied\n", actual); =20 return actual; --=20 2.34.1