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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-770b5bed428sm5628582b3a.16.2025.08.26.00.02.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 26 Aug 2025 00:02:06 -0700 (PDT) From: Jie Gan 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, linux-arm-msm@vger.kernel.org Subject: [PATCH v1 3/3] coresight: tpda: add sysfs node to flush specific port Date: Tue, 26 Aug 2025 15:01:50 +0800 Message-Id: <20250826070150.5603-4-jie.gan@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250826070150.5603-1-jie.gan@oss.qualcomm.com> References: <20250826070150.5603-1-jie.gan@oss.qualcomm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Authority-Analysis: v=2.4 cv=KOlaDEFo c=1 sm=1 tr=0 ts=68ad5bf0 cx=c_pps a=MTSHoo12Qbhz2p7MsH1ifg==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=2OwXVqhp2XgA:10 a=EUspDBNiAAAA:8 a=UsKUHg3HdU6Ygep39SEA:9 a=GvdueXVYPmCkWapjIL-Q:22 X-Proofpoint-GUID: EfFwMngyCK64dvwk4NHRFBOQa0mYfFSd X-Proofpoint-ORIG-GUID: EfFwMngyCK64dvwk4NHRFBOQa0mYfFSd X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwODIzMDAzMyBTYWx0ZWRfX5H3pGPovO3ci ljKg1pcgg5c2mgs2WZhbrO9wtkz35Ek/7KRJGa+K2xNySZL7LTz6wk+5ztM0paB9ym946Yfh/M1 1RCxuqbzUQv0WsRBWDPwaWCvjvAC6SBv/5rik61wNu59b6kC1m1bH17rpZ/9ooee4hU70X+fNx3 ipPaUmwqS6mMMFPSgl7mt8ZUkC5F+fLUJNSgRbMabwctBzh2GwGrN94Zxn1ceUkgXrJi5QHqiIK AI9hcrTS2YvIgkNOVMTN9wUnDNrtZU/y3DWONtxmk3fTzYgKSQP6l2i5QQ1jYIEYcjhdaIeDbWa rpJZY64OGe1SnJbwugM3rMM1mpj9ynyBPP8v78u+2aePMj4S7yPbzq4NT+T53udxqNgCjS5hS7O lBiOK+FI X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-08-26_02,2025-08-26_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 clxscore=1015 bulkscore=0 adultscore=0 phishscore=0 impostorscore=0 spamscore=0 suspectscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2507300000 definitions=main-2508230033 Content-Type: text/plain; charset="utf-8" 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 Co-developed-by: Jie Gan Signed-off-by: Jie Gan --- .../testing/sysfs-bus-coresight-devices-tpda | 7 +++ drivers/hwtracing/coresight/coresight-tpda.c | 45 +++++++++++++++++++ drivers/hwtracing/coresight/coresight-tpda.h | 1 + 3 files changed, 53 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpda b/D= ocumentation/ABI/testing/sysfs-bus-coresight-devices-tpda index e827396a0fa1..8803158ba42f 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: August 2025 +KernelVersion: 6.17 +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 9e623732d1e7..c5f169facc51 100644 --- a/drivers/hwtracing/coresight/coresight-tpda.c +++ b/drivers/hwtracing/coresight/coresight-tpda.c @@ -509,6 +509,50 @@ 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; + + guard(spinlock)(&drvdata->spinlock); + if (!drvdata->csdev->refcnt) + return -EPERM; + + val =3D readl_relaxed(drvdata->base + TPDA_FLUSH_CR); + return sysfs_emit(buf, "%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); + unsigned long val; + + if (kstrtoul(buf, 0, &val)) + return -EINVAL; + + /* The valid value ranges from 0 to 127 */ + if (val > 127) + return -EINVAL; + + guard(spinlock)(&drvdata->spinlock); + if (!drvdata->csdev->refcnt) + return -EPERM; + + if (val) { + 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, @@ -516,6 +560,7 @@ 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 00d146960d81..55a18d718357 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