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Thu, 10 Oct 2024 00:39:36 -0700 From: Songwei Chai To: Suzuki K Poulose , Mike Leach , James Clark , "Alexander Shishkin" , Andy Gross , Bjorn Andersson , Rob Herring , Krzysztof Kozlowski , Conor Dooley CC: Songwei Chai , , , , , Subject: [PATCH v2 7/7] coresight-tgu: add reset node to initialize Date: Thu, 10 Oct 2024 15:39:15 +0800 Message-ID: <20241010073917.16023-8-quic_songchai@quicinc.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20241010073917.16023-1-quic_songchai@quicinc.com> References: <20241010073917.16023-1-quic_songchai@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.49.16.6] X-ClientProxiedBy: nalasex01b.na.qualcomm.com (10.47.209.197) To nasanex01b.na.qualcomm.com (10.46.141.250) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: VgB04qOMXUnhI11kLJDVbvZP1J8-ZZSQ X-Proofpoint-ORIG-GUID: VgB04qOMXUnhI11kLJDVbvZP1J8-ZZSQ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-06_09,2024-09-06_01,2024-09-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 lowpriorityscore=0 mlxlogscore=999 malwarescore=0 suspectscore=0 priorityscore=1501 mlxscore=0 spamscore=0 phishscore=0 clxscore=1015 bulkscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2409260000 definitions=main-2410100048 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241010_083954_421351_52238130 X-CRM114-Status: GOOD ( 19.54 ) 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 Add reset node to initialize the value of priority/condition_decode/condition_select/timer/counter nodes Signed-off-by: Songwei Chai --- .../testing/sysfs-bus-coresight-devices-tgu | 7 ++ drivers/hwtracing/coresight/coresight-tgu.c | 79 +++++++++++++++++++ 2 files changed, 86 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tgu b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tgu index e404e0d6f8f0..0c8ea23ce9a3 100644 --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tgu +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tgu @@ -42,3 +42,10 @@ KernelVersion 6.10 Contact: Jinlong Mao (QUIC) , Sam Chai (QUIC) Description: (RW) Set/Get the counter value with specific step for TGU. + +What: /sys/bus/coresight/devices//reset_tgu +Date: August 2024 +KernelVersion 6.10 +Contact: Jinlong Mao (QUIC) , Sam Chai (QUIC) +Description: + (Write) Reset the dataset for TGU. diff --git a/drivers/hwtracing/coresight/coresight-tgu.c b/drivers/hwtracing/coresight/coresight-tgu.c index 05456e23b852..bec8e94a2234 100644 --- a/drivers/hwtracing/coresight/coresight-tgu.c +++ b/drivers/hwtracing/coresight/coresight-tgu.c @@ -343,6 +343,84 @@ static ssize_t enable_tgu_store(struct device *dev, } static DEVICE_ATTR_RW(enable_tgu); +/* reset_tgu_store - Reset Trace and Gating Unit (TGU) configuration. */ +static ssize_t reset_tgu_store(struct device *dev, + struct device_attribute *attr, const char *buf, + size_t size) +{ + unsigned long value; + struct tgu_drvdata *drvdata = dev_get_drvdata(dev->parent); + int i, j, ret; + + if (kstrtoul(buf, 0, &value)) + return -EINVAL; + + if (!drvdata->enable) { + ret = pm_runtime_get_sync(drvdata->dev); + if (ret < 0) { + pm_runtime_put(drvdata->dev); + return ret; + } + } + + spin_lock(&drvdata->spinlock); + CS_UNLOCK(drvdata->base); + + if (value) { + tgu_writel(drvdata, 0, TGU_CONTROL); + + if (drvdata->value_table->priority) + memset(drvdata->value_table->priority, 0, + MAX_PRIORITY * drvdata->max_step * + drvdata->max_reg * sizeof(unsigned int)); + + if (drvdata->value_table->condition_decode) + memset(drvdata->value_table->condition_decode, 0, + drvdata->max_condition_decode * drvdata->max_step * + sizeof(unsigned int)); + + /* Initialize all condition registers to NOT(value=0x1000000) */ + for (i = 0; i < drvdata->max_step; i++) { + for (j = 0; j < drvdata->max_condition_decode; j++) { + drvdata->value_table + ->condition_decode[calculate_array_location( + drvdata, i, TGU_CONDITION_DECODE, j)] = + 0x1000000; + } + } + + if (drvdata->value_table->condition_select) + memset(drvdata->value_table->condition_select, 0, + drvdata->max_condition_select * drvdata->max_step * + sizeof(unsigned int)); + + if (drvdata->value_table->timer) + memset(drvdata->value_table->timer, 0, + (drvdata->max_step) * + (drvdata->max_timer_counter) * + sizeof(unsigned int)); + + if (drvdata->value_table->counter) + memset(drvdata->value_table->counter, 0, + (drvdata->max_step) * + (drvdata->max_timer_counter) * + sizeof(unsigned int)); + + dev_dbg(dev, "Coresight-TGU reset complete\n"); + } else { + dev_dbg(dev, "Coresight-TGU invalid input\n"); + } + + CS_LOCK(drvdata->base); + + drvdata->enable = false; + spin_unlock(&drvdata->spinlock); + pm_runtime_put(drvdata->dev); + + return size; +} +static DEVICE_ATTR_WO(reset_tgu); + static const struct coresight_ops_helper tgu_helper_ops = { .enable = tgu_enable, .disable = tgu_disable, @@ -354,6 +432,7 @@ static const struct coresight_ops tgu_ops = { static struct attribute *tgu_common_attrs[] = { &dev_attr_enable_tgu.attr, + &dev_attr_reset_tgu.attr, NULL, };