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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2a2f3c6661esm120824625ad.2.2025.12.23.02.10.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 23 Dec 2025 02:10:22 -0800 (PST) From: Jie Gan Date: Tue, 23 Dec 2025 18:09:53 +0800 Subject: [PATCH v8 4/4] 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: <20251223-add_sysfs_nodes_to_configure_tpda-v8-4-4c95db608b62@oss.qualcomm.com> References: <20251223-add_sysfs_nodes_to_configure_tpda-v8-0-4c95db608b62@oss.qualcomm.com> In-Reply-To: <20251223-add_sysfs_nodes_to_configure_tpda-v8-0-4c95db608b62@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=1766484607; l=3701; i=jie.gan@oss.qualcomm.com; s=20250909; h=from:subject:message-id; bh=81dX2nTlJr2gpRluG70T7YUTTcZv6ubCht7Nlur4GXg=; b=FvZ9kNSl2e5b9eKViO/BPeuoah03ZoDuyXlXfX0w1R7qUSRmAI62644Ak2+mcvJErrfEB/GTR t/lL3b3fwt2BSeDwnblfbG64SLmrxF9xRxn3d3JfeUHVZ2K5Mqz7hR3 X-Developer-Key: i=jie.gan@oss.qualcomm.com; a=ed25519; pk=3LxxUZRPCNkvPDlWOvXfJNqNO4SfGdy3eghMb8puHuk= X-Proofpoint-ORIG-GUID: B26qUSWd_Pc4ImN8nhaAatHfWL0wr_y4 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMjIzMDA4MCBTYWx0ZWRfX3UOyom68SF3d DXN8PBpHo9+DBOzGAs5FH23MfxVJ2phu0QjyeKJLF8xKRVndMSbUM4lRYx7LR/NcSMyw+FLs6/V DGVmCMHqOPgINuq/oAs6rSH0zW463ZU5XG9q+K/Z5ZpYAIV+XjsEnd/YvDJAG18Y4yWHbvlDiPa bylxG4ubeNpcOBk3ndXlpbAOQymrpujEwLo2KVbq93mZ4n+B2K+5pSDGOYPlhGiJMXOr6qBI0Ne YDGm5si6YUsfS+BlkurmHwk218XBA9JjdQENy8vDtWJSGPBaZODA/lhr+4o9PjwLrMN+JiTC/Rt LoP6wyyz8zlYXqQxKc76Mg2OssInfVKVfMb5F4Ul/MyTmIreqOlBZRMyFfkUrDRXWDpWrqtPxeb R7y7uEjykZR4+n9LxsLn+Vvo20GuGfTejEwidan1OAA6MbYLREGWaxyJ2jUvI5DOjqLhf3IfNog /akpvMIBAec1l9o2h+A== X-Proofpoint-GUID: B26qUSWd_Pc4ImN8nhaAatHfWL0wr_y4 X-Authority-Analysis: v=2.4 cv=NZDrFmD4 c=1 sm=1 tr=0 ts=694a6a8f cx=c_pps a=IZJwPbhc+fLeJZngyXXI0A==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=IkcTkHD0fZMA:10 a=wP3pNCr1ah4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=EUspDBNiAAAA:8 a=KKAkSRfTAAAA:8 a=Uaz1Er67hVaxBR8z2rIA: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:17.12.100.49 definitions=2025-12-23_02,2025-12-22_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 spamscore=0 clxscore=1015 impostorscore=0 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 adultscore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2512120000 definitions=main-2512230080 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 | 8 +++++ drivers/hwtracing/coresight/coresight-tpda.c | 40 ++++++++++++++++++= ++++ 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 c989eea1ef59..48b8fda1b796 100644 --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpda +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpda @@ -59,3 +59,11 @@ Contact: Jinlong Mao , Tao= Zhang /port_flush_req +Date: December 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. + The requested bit(s) remain set until the flush request completes. diff --git a/drivers/hwtracing/coresight/coresight-tpda.c b/drivers/hwtraci= ng/coresight/coresight-tpda.c index deb5a646a04c..7055f8f13427 100644 --- a/drivers/hwtracing/coresight/coresight-tpda.c +++ b/drivers/hwtracing/coresight/coresight-tpda.c @@ -473,10 +473,50 @@ static ssize_t syncr_count_store(struct device *dev, } static DEVICE_ATTR_RW(syncr_count); =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); + val =3D readl_relaxed(drvdata->base + TPDA_FLUSH_CR); + + 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_global_flush_req.attr, &dev_attr_syncr_mode.attr, &dev_attr_syncr_count.attr, + &dev_attr_port_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 56d35697303a..a090352009bb 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 global (all ports) flush request bit */ #define TPDA_CR_FLREQ BIT(0) --=20 2.34.1