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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-29498d2789bsm95861895ad.62.2025.10.27.19.02.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 Oct 2025 19:02:49 -0700 (PDT) From: Jie Gan Date: Tue, 28 Oct 2025 10:02:17 +0800 Subject: [PATCH v4 3/3] coresight: tpda: add sysfs node to flush specific port 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: <20251028-configure_tpda_reg-v4-3-23000805d21d@oss.qualcomm.com> References: <20251028-configure_tpda_reg-v4-0-23000805d21d@oss.qualcomm.com> In-Reply-To: <20251028-configure_tpda_reg-v4-0-23000805d21d@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 , Tao Zhang X-Mailer: b4 0.14.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1761616955; l=3779; i=jie.gan@oss.qualcomm.com; s=20250909; h=from:subject:message-id; bh=jDq21b1Z8mMMtc7DmhlI9qf036ZjY6vmqb55m6leOnQ=; b=TykYWRh4kXkeVJ0qVldcJsYhpROcPoeLyg/QusfUnnRl3p+TkGNRszmNpzWTK64rMcJ9EwJRa PpZJQhq55aYCnGajpS4jseWWlXV6gIeSqWMP/Kgs4GAsGH39iGDjaz6 X-Developer-Key: i=jie.gan@oss.qualcomm.com; a=ed25519; pk=3LxxUZRPCNkvPDlWOvXfJNqNO4SfGdy3eghMb8puHuk= X-Proofpoint-ORIG-GUID: dSoGcA0YjL4nig_TLbQSXsXHHw8qbQMK X-Proofpoint-GUID: dSoGcA0YjL4nig_TLbQSXsXHHw8qbQMK X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMDI4MDAxNyBTYWx0ZWRfX3PHIchq1RFf+ vFt1XTBG/T5BqeRwJRtQ0214FwNZ1upb5PfC5GT0V7muZLMOHG9orzOATHXKUspwT9PJlK8CJ+W BMtvKyHVCpxF7F7kjquiEZsCGPqldvlGphh6Lvy3HRvuw7EI+RasjEDlhmaihsi+WREJe5mXetN 9gOZrCArVaoFlzD5oQuxkb+/qz3y1uUwGwf8LMuyEcW8vGeaTWmHdvo0rs4+zrdKKbmlgfisJ1t WmU/zbX4OOUAJF8ZA5PK8Qhzf2hVtgpi74SlBoN7OMxyYQl1lHO25ui7SU6Zt0WxksWdFwGNn5s GFitdY5P8XbDBGza5HJ+1OnwsOTe2jxM9mMHvCR0wXNx2XjTjNw2J4DYlYx1duGcEk5yD3WJZWX T2U0ygky+fd/gmvZ0zVdwqMoqXoxHw== X-Authority-Analysis: v=2.4 cv=R60O2NRX c=1 sm=1 tr=0 ts=6900244b cx=c_pps a=IZJwPbhc+fLeJZngyXXI0A==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=IkcTkHD0fZMA:10 a=x6icFKpwvdMA:10 a=VkNPw1HP01LnGYTKEx00:22 a=EUspDBNiAAAA:8 a=KKAkSRfTAAAA:8 a=oM8RmAA2zgEEgW_MHrIA:9 a=QEXdDO2ut3YA:10 a=uG9DUKGECoFWVXl0Dc02:22 a=cvBusfyB2V15izCimMoJ:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-10-28_01,2025-10-22_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 lowpriorityscore=0 phishscore=0 bulkscore=0 impostorscore=0 clxscore=1015 spamscore=0 adultscore=0 malwarescore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2510020000 definitions=main-2510280017 From: Tao Zhang Setting bit i in the TPDA_FLUSH_CR register initiates a flush request for port i, forcing the data to synchronize and be transmitted to the sink device. Signed-off-by: Tao Zhang Reviewed-by: James Clark Co-developed-by: Jie Gan Signed-off-by: Jie Gan --- .../ABI/testing/sysfs-bus-coresight-devices-tpda | 7 ++++ drivers/hwtracing/coresight/coresight-tpda.c | 41 ++++++++++++++++++= ++++ drivers/hwtracing/coresight/coresight-tpda.h | 1 + 3 files changed, 49 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpda b/D= ocumentation/ABI/testing/sysfs-bus-coresight-devices-tpda index 80e4b05a1ab4..e047f69fd5cc 100644 --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpda +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpda @@ -41,3 +41,10 @@ Contact: Jinlong Mao , Tao= Zhang /port_flush_req +Date: October 2025 +KernelVersion: 6.19 +Contact: Jinlong Mao , Tao Zhang , Jie Gan +Description: + (RW) Configure the bit i to requests a flush operation of port i on the = TPDA. diff --git a/drivers/hwtracing/coresight/coresight-tpda.c b/drivers/hwtraci= ng/coresight/coresight-tpda.c index f079861da279..3121c4c527fa 100644 --- a/drivers/hwtracing/coresight/coresight-tpda.c +++ b/drivers/hwtracing/coresight/coresight-tpda.c @@ -481,6 +481,46 @@ static ssize_t cmbchan_mode_store(struct device *dev, } static DEVICE_ATTR_RW(cmbchan_mode); =20 +static ssize_t port_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); + CS_UNLOCK(drvdata->base); + val =3D readl_relaxed(drvdata->base + TPDA_FLUSH_CR); + CS_LOCK(drvdata->base); + return sysfs_emit(buf, "0x%lx\n", val); +} + +static ssize_t port_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); + u32 val; + + if (kstrtou32(buf, 0, &val)) + return -EINVAL; + + if (!drvdata->csdev->refcnt || !val) + return -EINVAL; + + guard(spinlock)(&drvdata->spinlock); + CS_UNLOCK(drvdata->base); + writel_relaxed(val, drvdata->base + TPDA_FLUSH_CR); + CS_LOCK(drvdata->base); + + return size; +} +static DEVICE_ATTR_RW(port_flush_req); + static struct attribute *tpda_attrs[] =3D { &dev_attr_trig_async_enable.attr, &dev_attr_trig_flag_ts_enable.attr, @@ -488,6 +528,7 @@ static struct attribute *tpda_attrs[] =3D { &dev_attr_freq_ts_enable.attr, &dev_attr_global_flush_req.attr, &dev_attr_cmbchan_mode.attr, + &dev_attr_port_flush_req.attr, NULL, }; =20 diff --git a/drivers/hwtracing/coresight/coresight-tpda.h b/drivers/hwtraci= ng/coresight/coresight-tpda.h index 0c9bf2fade56..284ac63699ad 100644 --- a/drivers/hwtracing/coresight/coresight-tpda.h +++ b/drivers/hwtracing/coresight/coresight-tpda.h @@ -10,6 +10,7 @@ #define TPDA_Pn_CR(n) (0x004 + (n * 4)) #define TPDA_FPID_CR (0x084) #define TPDA_SYNCR (0x08C) +#define TPDA_FLUSH_CR (0x090) =20 /* Cross trigger FREQ packets timestamp bit */ #define TPDA_CR_FREQTS BIT(2) --=20 2.34.1