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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-c743a939af0sm6591935a12.16.2026.03.23.02.50.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 23 Mar 2026 02:50:08 -0700 (PDT) From: Jie Gan Date: Mon, 23 Mar 2026 17:49:29 +0800 Subject: [PATCH v16 4/7] coresight: etr: add a new function to retrieve the CTCU device 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: <20260323-enable-byte-cntr-for-ctcu-v16-4-7a413d211b8d@oss.qualcomm.com> References: <20260323-enable-byte-cntr-for-ctcu-v16-0-7a413d211b8d@oss.qualcomm.com> In-Reply-To: <20260323-enable-byte-cntr-for-ctcu-v16-0-7a413d211b8d@oss.qualcomm.com> To: Suzuki K Poulose , Mike Leach , James Clark , Alexander Shishkin , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Tingwei Zhang , 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=1774259384; l=2348; i=jie.gan@oss.qualcomm.com; s=20250909; h=from:subject:message-id; bh=QjBBWW3nZNJQ7dW86dG4Ar+IGXRSYDsLrfUfjlg4xNQ=; b=/ND2nS44mbInVi4eNYBq/svnHomprXsHoRCmcKSXJZJjvVzmC7pJzBR0bMBaeQMxxQlzQqux1 UeemwW4IB24AXbcIycNxDxrs8HgNvFJRGYIm+DAEvI3VmliTw9r+tCV X-Developer-Key: i=jie.gan@oss.qualcomm.com; a=ed25519; pk=3LxxUZRPCNkvPDlWOvXfJNqNO4SfGdy3eghMb8puHuk= X-Proofpoint-GUID: SUKu5WSvir3ZgMpAh-NQ-_RbtNFmm1Vi X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzIzMDA3NSBTYWx0ZWRfX55tmSw2RfLsZ frAg5Wu2f6e/mNzEbGZr16AfiiuMeZR+b5r9mrsZzsJDdyXNpcUPwjcJuP0pNYdApNb0I2Fp1gc XjIjyk3tW+m0DK64cTM1K3fnDI3dkKx+m7nGw7dLJgp7D/EnhW7dvpwIZ939277wVlKpqi8WTmD bh4up7x4xGkRT14w8QOkN2QfhkRF3Q7ZofvZL2ClQ4iO8981Z1wGFZ2r4VKMqFCp0XzopDPydvd 2QDhaDIq5h2lnLBPTv+RGqzuudc9ZhalL2s93f7ThqzBPEq6de4cbvH7Ij2V+Stzjb1arXj6lob UGZWnkF52e8I0VDRvvbLABnVerz+OnoZX55nkVeg5uAD/zmwQUiq3gLfCwSSRu7d6yVQ3Ra1/gl z+oM9428T6dGiF0zn8H5pk9XH2Y6ohYEDIY2FCiQFYoRDpxwJ5ZfEaOWlN+xamYVh/x9WMKC+Nk 7UHHaQNoChlQ4Hj5MZw== X-Authority-Analysis: v=2.4 cv=CMInnBrD c=1 sm=1 tr=0 ts=69c10cd1 cx=c_pps a=UNFcQwm+pnOIJct1K4W+Mw==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=IkcTkHD0fZMA:10 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_K5XuSEh1TEqbUxoQ0s3:22 a=EUspDBNiAAAA:8 a=FuIWbRVyn4pKkvqW11oA:9 a=QEXdDO2ut3YA:10 a=uKXjsCUrEbL0IQVhDsJ9:22 X-Proofpoint-ORIG-GUID: SUKu5WSvir3ZgMpAh-NQ-_RbtNFmm1Vi X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-23_03,2026-03-20_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 clxscore=1015 malwarescore=0 adultscore=0 lowpriorityscore=0 priorityscore=1501 spamscore=0 phishscore=0 impostorscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2603230075 Add tmc_etr_get_ctcu_device function to find the ptr of the coresight_device of the CTCU device if the CTCU device is connected to the TMC ETR device. Signed-off-by: Jie Gan --- drivers/hwtracing/coresight/coresight-tmc-etr.c | 24 +++++++++++++++++++++= +++ drivers/hwtracing/coresight/coresight-tmc.h | 1 + 2 files changed, 25 insertions(+) diff --git a/drivers/hwtracing/coresight/coresight-tmc-etr.c b/drivers/hwtr= acing/coresight/coresight-tmc-etr.c index 306982e88dbb..d4a99c77dd90 100644 --- a/drivers/hwtracing/coresight/coresight-tmc-etr.c +++ b/drivers/hwtracing/coresight/coresight-tmc-etr.c @@ -865,6 +865,30 @@ tmc_etr_get_catu_device(struct tmc_drvdata *drvdata) } EXPORT_SYMBOL_GPL(tmc_etr_get_catu_device); =20 +/* + * TMC ETR could be connected to a CTCU device, which can provide ATID fil= ter + * and byte-cntr service. This is represented by the output port of the TMC + * (ETR) connected to the input port of the CTCU. + * + * Returns : coresight_device ptr for the CTCU device if a CTCU is found. + * : NULL otherwise. + */ +struct coresight_device * +tmc_etr_get_ctcu_device(struct tmc_drvdata *drvdata) +{ + struct coresight_device *etr =3D drvdata->csdev; + union coresight_dev_subtype ctcu_subtype =3D { + .helper_subtype =3D CORESIGHT_DEV_SUBTYPE_HELPER_CTCU + }; + + if (!IS_ENABLED(CONFIG_CORESIGHT_CTCU)) + return NULL; + + return coresight_find_output_type(etr->pdata, CORESIGHT_DEV_TYPE_HELPER, + ctcu_subtype); +} +EXPORT_SYMBOL_GPL(tmc_etr_get_ctcu_device); + static const struct etr_buf_operations *etr_buf_ops[] =3D { [ETR_MODE_FLAT] =3D &etr_flat_buf_ops, [ETR_MODE_ETR_SG] =3D &etr_sg_buf_ops, diff --git a/drivers/hwtracing/coresight/coresight-tmc.h b/drivers/hwtracin= g/coresight/coresight-tmc.h index a14645b04624..fbb015079872 100644 --- a/drivers/hwtracing/coresight/coresight-tmc.h +++ b/drivers/hwtracing/coresight/coresight-tmc.h @@ -470,6 +470,7 @@ static inline uint32_t find_crash_tracedata_crc(struct = tmc_drvdata *drvdata, } =20 struct coresight_device *tmc_etr_get_catu_device(struct tmc_drvdata *drvda= ta); +struct coresight_device *tmc_etr_get_ctcu_device(struct tmc_drvdata *drvda= ta); =20 void tmc_etr_set_catu_ops(const struct etr_buf_operations *catu); void tmc_etr_remove_catu_ops(void); --=20 2.34.1