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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-771f2f2ac7dsm5573035b3a.43.2025.08.27.03.55.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 27 Aug 2025 03:55:59 -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 v3 3/3] coresight: tpda: add sysfs node to flush specific port Date: Wed, 27 Aug 2025 18:55:45 +0800 Message-Id: <20250827105545.7140-4-jie.gan@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250827105545.7140-1-jie.gan@oss.qualcomm.com> References: <20250827105545.7140-1-jie.gan@oss.qualcomm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-ORIG-GUID: 4Ai5Hn5JYw_ICy0dSzgfBBVl6PBCq5JG X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwODIzMDA0NCBTYWx0ZWRfX0m0cfBCbAXh8 yBVhPmr4fK/4U6ceOKNnbyUKnqQymjGBZ+y619Wc+la7IUF93Lfqc7+bYbjlxDTSH9wZMP+PFNE gDi/Rsr7Z9TlamLQcWjqA8lE2+iLNZ8UZ9w0Teunok3iBZjl5XuJ8DhDqgBdzJ2MELG5L1VGkuG z0yrYmTs2h1lYWzcMYCHJ9H2Syk63kbpzjWQAzY7YCzMV4O1VYOuIcNLCpU15y2I6+Lo/Xgj1YS vTwDLD83USPHhRTNFfYYOZyKUCzJTltjBoodIOFgM/EUHk6Jk7rcooHCRK/B9Zbs/qQvJ2RUZxy dRNLCjv4RSm2AYuEBknPOO9sW8J6BPd9lLZhj1+ZaN9gL08NocB3cY4z58808+rmN+6ItCk1y8x t/oa72Kv X-Proofpoint-GUID: 4Ai5Hn5JYw_ICy0dSzgfBBVl6PBCq5JG X-Authority-Analysis: v=2.4 cv=Ep/SrTcA c=1 sm=1 tr=0 ts=68aee441 cx=c_pps a=RP+M6JBNLl+fLTcSJhASfg==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=2OwXVqhp2XgA:10 a=EUspDBNiAAAA:8 a=tK8iAimETgkDkOB5pRoA:9 a=iS9zxrgQBfv6-_F4QbHw:22 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=2025-08-27_02,2025-08-26_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 spamscore=0 adultscore=0 bulkscore=0 suspectscore=0 phishscore=0 priorityscore=1501 malwarescore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2507300000 definitions=main-2508230044 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250827_035602_186279_48AACA88 X-CRM114-Status: GOOD ( 16.47 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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 | 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/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpda index fb651aebeb31..2cf2dcfc13c8 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/hwtracing/coresight/coresight-tpda.c index a1393962b04d..e9e2736071fb 100644 --- a/drivers/hwtracing/coresight/coresight-tpda.c +++ b/drivers/hwtracing/coresight/coresight-tpda.c @@ -490,6 +490,46 @@ static ssize_t cmbchan_mode_store(struct device *dev, } static DEVICE_ATTR_RW(cmbchan_mode); +static ssize_t port_flush_req_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct tpda_drvdata *drvdata = dev_get_drvdata(dev->parent); + unsigned long val; + + if (!drvdata->csdev->refcnt) + return -EINVAL; + + guard(spinlock)(&drvdata->spinlock); + CS_UNLOCK(drvdata->base); + val = 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 = 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[] = { &dev_attr_trig_async_enable.attr, &dev_attr_trig_flag_ts_enable.attr, @@ -497,6 +537,7 @@ static struct attribute *tpda_attrs[] = { &dev_attr_freq_ts_enable.attr, &dev_attr_global_flush_req.attr, &dev_attr_cmbchan_mode.attr, + &dev_attr_port_flush_req.attr, NULL, }; diff --git a/drivers/hwtracing/coresight/coresight-tpda.h b/drivers/hwtracing/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) /* Cross trigger FREQ packets timestamp bit */ #define TPDA_CR_FREQTS BIT(2) -- 2.34.1