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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7ff7e892926sm9070130b3a.66.2025.12.21.22.02.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 21 Dec 2025 22:02:59 -0800 (PST) From: Jie Gan Date: Mon, 22 Dec 2025 14:02:22 +0800 Subject: [PATCH v6 2/4] coresight: tpda: add global_flush_req sysfs node 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: <20251222-add_sysfs_nodes_to_configure_tpda-v6-2-b27143d45c86@oss.qualcomm.com> References: <20251222-add_sysfs_nodes_to_configure_tpda-v6-0-b27143d45c86@oss.qualcomm.com> In-Reply-To: <20251222-add_sysfs_nodes_to_configure_tpda-v6-0-b27143d45c86@oss.qualcomm.com> To: Suzuki K Poulose , Mike Leach , James Clark , Alexander Shishkin , Tingwei Zhang Cc: coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Jie Gan X-Mailer: b4 0.14.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1766383369; l=3748; i=jie.gan@oss.qualcomm.com; s=20250909; h=from:subject:message-id; bh=BRgMyJQu9Kzy/G9nmhSYpMl8s8NAvtzMpAI0JLWtcFU=; b=EXZFc3Z4bi2JO/27/BDFQxBKcwM7rzcHZLhfFpLFeKpBBph7KsHSYdhr9oG8c9hwKEQ7lfMeF 2cRjsqcJEPKDaz52PFqehtYE88ngEwrhi28td0TGxAVCbZk4SKQnNTm X-Developer-Key: i=jie.gan@oss.qualcomm.com; a=ed25519; pk=3LxxUZRPCNkvPDlWOvXfJNqNO4SfGdy3eghMb8puHuk= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMjIyMDA1MiBTYWx0ZWRfXydvafcxCrmBW zgkByJmB6F/Q4CK6iXuimqhbARL1SmmjtLXhZRMe38JYHiFLx1oejwr95jIinbQ9GHpGHiZrfeA SaEuVPpErchPa83Dayosn6uoBaSrCrqVAF/2qDpZbtwEIF2UxWUpmHGAksq9MWIMKlMhVoRYVDX FXv2p86DbVn3UqgypUQdbTCz0jXmsHmgW1xQVJ+jfj118jFcFnqHXwiIa5Ml8SdpamwC3lh4WF1 p2ZEYcV1F2W9QRFxsefOSKK6kC2laaANWPd0qPDYKRzEuqfyu7OJ93fVUaUFxDrzozgnZg5+8z6 xUZSE+kyiNf7cX8PP3OgC27mAEidQRZIq4GC4EPJPM8hZl2OTuRXGZmAk/rc3hYF7JWYO4lD/tJ pMnmmL4Ci0ifv3GXZO3LmIY+AZrkDMirXgXUDovasp9jTgjBxESxgoQhycW5xU6Y9V+yrLFNaZt 0A6wbSwUFU1Pr2t0QSg== X-Proofpoint-GUID: DfucmeUZ4tucXRM5BZ9IEeYrXRmFSHsD X-Proofpoint-ORIG-GUID: DfucmeUZ4tucXRM5BZ9IEeYrXRmFSHsD X-Authority-Analysis: v=2.4 cv=VJ/QXtPX c=1 sm=1 tr=0 ts=6948df1a cx=c_pps a=m5Vt/hrsBiPMCU0y4gIsQw==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=IkcTkHD0fZMA:10 a=wP3pNCr1ah4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=EUspDBNiAAAA:8 a=-PhlUL0ANfhXhD-FZUEA:9 a=QEXdDO2ut3YA:10 a=IoOABgeZipijB_acs4fv:22 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=2025-12-21_05,2025-12-19_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 lowpriorityscore=0 suspectscore=0 spamscore=0 priorityscore=1501 impostorscore=0 bulkscore=0 adultscore=0 clxscore=1015 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2512120000 definitions=main-2512220052 Setting the global_flush_req register to 1 initiates a flush request for all enabled TPDA input ports. The register remains set until the flush operation is complete. Signed-off-by: Jie Gan --- .../ABI/testing/sysfs-bus-coresight-devices-tpda | 8 ++++ drivers/hwtracing/coresight/coresight-tpda.c | 45 ++++++++++++++++++= ++++ drivers/hwtracing/coresight/coresight-tpda.h | 2 + 3 files changed, 55 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpda b/D= ocumentation/ABI/testing/sysfs-bus-coresight-devices-tpda index 735ce0e494da..c8bc7b19ab25 100644 --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpda +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpda @@ -33,3 +33,11 @@ Contact: Jinlong Mao , Tao= Zhang /global_flush_req +Date: December 2025 +KernelVersion: 6.19 +Contact: Jinlong Mao , Tao Zhang , Jie Gan +Description: + (RW) Set global (all ports) flush request bit. The bit remains set until= a + global flush request sequence completes. diff --git a/drivers/hwtracing/coresight/coresight-tpda.c b/drivers/hwtraci= ng/coresight/coresight-tpda.c index 2186223ad33e..d24a9098f1b1 100644 --- a/drivers/hwtracing/coresight/coresight-tpda.c +++ b/drivers/hwtracing/coresight/coresight-tpda.c @@ -341,7 +341,52 @@ static ssize_t tpda_trig_sysfs_store(struct device *de= v, return size; } =20 +static ssize_t global_flush_req_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct tpda_drvdata *drvdata =3D dev_get_drvdata(dev->parent); + unsigned long val; + + if (!drvdata->csdev->refcnt) + return -EINVAL; + + guard(spinlock)(&drvdata->spinlock); + val =3D readl_relaxed(drvdata->base + TPDA_CR); + /* read global_flush_req bit */ + val &=3D TPDA_CR_FLREQ; + + return sysfs_emit(buf, "%lu\n", val); +} + +static ssize_t global_flush_req_store(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t size) +{ + struct tpda_drvdata *drvdata =3D dev_get_drvdata(dev->parent); + unsigned long val; + + if (kstrtoul(buf, 0, &val)) + return -EINVAL; + + if (!drvdata->csdev->refcnt || !val) + return -EINVAL; + + guard(spinlock)(&drvdata->spinlock); + val =3D readl_relaxed(drvdata->base + TPDA_CR); + /* set global_flush_req bit */ + val |=3D TPDA_CR_FLREQ; + CS_UNLOCK(drvdata->base); + writel_relaxed(val, drvdata->base + TPDA_CR); + CS_LOCK(drvdata->base); + + return size; +} +static DEVICE_ATTR_RW(global_flush_req); + static struct attribute *tpda_attrs[] =3D { + &dev_attr_global_flush_req.attr, tpda_trig_sysfs_rw(freq_ts_enable, FREQTS), tpda_trig_sysfs_rw(trig_freq_enable, FRIE), tpda_trig_sysfs_rw(trig_flag_ts_enable, FLRIE), diff --git a/drivers/hwtracing/coresight/coresight-tpda.h b/drivers/hwtraci= ng/coresight/coresight-tpda.h index c93732e04af2..1cc9253293ec 100644 --- a/drivers/hwtracing/coresight/coresight-tpda.h +++ b/drivers/hwtracing/coresight/coresight-tpda.h @@ -10,6 +10,8 @@ #define TPDA_Pn_CR(n) (0x004 + (n * 4)) #define TPDA_FPID_CR (0x084) =20 +/* Cross trigger global (all ports) flush request bit */ +#define TPDA_CR_FLREQ BIT(0) /* Cross trigger FREQ packets timestamp bit */ #define TPDA_CR_FREQTS BIT(2) /* Cross trigger FREQ packet request bit */ --=20 2.34.1