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Fri, 7 Feb 2025 06:42:53 GMT Received: from jiegan-gv.qualcomm.com (10.80.80.8) by nalasex01c.na.qualcomm.com (10.47.97.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Thu, 6 Feb 2025 22:42:48 -0800 From: Jie Gan To: Suzuki K Poulose , Mike Leach , James Clark , "Alexander Shishkin" , Maxime Coquelin , Alexandre Torgue , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Bjorn Andersson , Konrad Dybcio CC: Tingwei Zhang , Jinlong Mao , , , , , , Subject: [PATCH v10 2/7] Coresight: Add trace_id function to retrieving the trace ID Date: Fri, 7 Feb 2025 14:42:08 +0800 Message-ID: <20250207064213.2314482-3-quic_jiegan@quicinc.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250207064213.2314482-1-quic_jiegan@quicinc.com> References: <20250207064213.2314482-1-quic_jiegan@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nalasex01c.na.qualcomm.com (10.47.97.35) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: Z8HLDujoaAOOGCMRKrbQYBql3ggZP06G X-Proofpoint-ORIG-GUID: Z8HLDujoaAOOGCMRKrbQYBql3ggZP06G X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1057,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-02-07_03,2025-02-07_01,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 lowpriorityscore=0 malwarescore=0 adultscore=0 spamscore=0 impostorscore=0 suspectscore=0 bulkscore=0 priorityscore=1501 clxscore=1015 mlxscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2501170000 definitions=main-2502070051 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250206_224306_818143_D696581D X-CRM114-Status: GOOD ( 17.49 ) 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 'trace_id' function pointer in ops. It's responsible for retrieving the device's trace ID. Co-developed-by: James Clark Signed-off-by: James Clark Signed-off-by: Jie Gan --- drivers/hwtracing/coresight/coresight-core.c | 27 +++++++++++++++++++ drivers/hwtracing/coresight/coresight-dummy.c | 11 ++++++++ .../coresight/coresight-etm3x-core.c | 1 + .../coresight/coresight-etm4x-core.c | 1 + drivers/hwtracing/coresight/coresight-stm.c | 11 ++++++++ drivers/hwtracing/coresight/coresight-tpda.c | 11 ++++++++ include/linux/coresight.h | 8 ++++++ 7 files changed, 70 insertions(+) diff --git a/drivers/hwtracing/coresight/coresight-core.c b/drivers/hwtracing/coresight/coresight-core.c index 0a9380350fb5..6cad777757f3 100644 --- a/drivers/hwtracing/coresight/coresight-core.c +++ b/drivers/hwtracing/coresight/coresight-core.c @@ -23,6 +23,7 @@ #include "coresight-etm-perf.h" #include "coresight-priv.h" #include "coresight-syscfg.h" +#include "coresight-trace-id.h" /* * Mutex used to lock all sysfs enable and disable actions and loading and @@ -1515,6 +1516,32 @@ void coresight_remove_driver(struct amba_driver *amba_drv, } EXPORT_SYMBOL_GPL(coresight_remove_driver); +int coresight_etm_get_trace_id(struct coresight_device *csdev, enum cs_mode mode, + struct coresight_device *sink) +{ + int trace_id; + int cpu = source_ops(csdev)->cpu_id(csdev); + + switch (mode) { + case CS_MODE_SYSFS: + trace_id = coresight_trace_id_get_cpu_id(cpu); + break; + case CS_MODE_PERF: + trace_id = coresight_trace_id_get_cpu_id_map(cpu, &sink->perf_sink_id_map); + break; + default: + trace_id = -EINVAL; + break; + } + + if (!IS_VALID_CS_TRACE_ID(trace_id)) + dev_err(&csdev->dev, + "Failed to allocate trace ID on CPU%d\n", cpu); + + return trace_id; +} +EXPORT_SYMBOL_GPL(coresight_etm_get_trace_id); + MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Pratik Patel "); MODULE_AUTHOR("Mathieu Poirier "); diff --git a/drivers/hwtracing/coresight/coresight-dummy.c b/drivers/hwtracing/coresight/coresight-dummy.c index 9be53be8964b..c47f0382b943 100644 --- a/drivers/hwtracing/coresight/coresight-dummy.c +++ b/drivers/hwtracing/coresight/coresight-dummy.c @@ -41,6 +41,16 @@ static void dummy_source_disable(struct coresight_device *csdev, dev_dbg(csdev->dev.parent, "Dummy source disabled\n"); } +static int dummy_source_trace_id(struct coresight_device *csdev, __maybe_unused enum cs_mode mode, + __maybe_unused struct coresight_device *sink) +{ + struct dummy_drvdata *drvdata; + + drvdata = dev_get_drvdata(csdev->dev.parent); + + return drvdata->traceid; +} + static int dummy_sink_enable(struct coresight_device *csdev, enum cs_mode mode, void *data) { @@ -59,6 +69,7 @@ static int dummy_sink_disable(struct coresight_device *csdev) static const struct coresight_ops_source dummy_source_ops = { .enable = dummy_source_enable, .disable = dummy_source_disable, + .trace_id = dummy_source_trace_id, }; static const struct coresight_ops dummy_source_cs_ops = { diff --git a/drivers/hwtracing/coresight/coresight-etm3x-core.c b/drivers/hwtracing/coresight/coresight-etm3x-core.c index c103f4c70f5d..a38e72ef8e79 100644 --- a/drivers/hwtracing/coresight/coresight-etm3x-core.c +++ b/drivers/hwtracing/coresight/coresight-etm3x-core.c @@ -701,6 +701,7 @@ static const struct coresight_ops_source etm_source_ops = { .cpu_id = etm_cpu_id, .enable = etm_enable, .disable = etm_disable, + .trace_id = coresight_etm_get_trace_id, }; static const struct coresight_ops etm_cs_ops = { diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c index 2c1a60577728..1a993d5380e7 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x-core.c +++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c @@ -1064,6 +1064,7 @@ static const struct coresight_ops_source etm4_source_ops = { .cpu_id = etm4_cpu_id, .enable = etm4_enable, .disable = etm4_disable, + .trace_id = coresight_etm_get_trace_id, }; static const struct coresight_ops etm4_cs_ops = { diff --git a/drivers/hwtracing/coresight/coresight-stm.c b/drivers/hwtracing/coresight/coresight-stm.c index b581a30a1cd9..64fcfa916562 100644 --- a/drivers/hwtracing/coresight/coresight-stm.c +++ b/drivers/hwtracing/coresight/coresight-stm.c @@ -281,9 +281,20 @@ static void stm_disable(struct coresight_device *csdev, } } +static int stm_trace_id(struct coresight_device *csdev, __maybe_unused enum cs_mode mode, + __maybe_unused struct coresight_device *sink) +{ + struct stm_drvdata *drvdata; + + drvdata = dev_get_drvdata(csdev->dev.parent); + + return drvdata->traceid; +} + static const struct coresight_ops_source stm_source_ops = { .enable = stm_enable, .disable = stm_disable, + .trace_id = stm_trace_id, }; static const struct coresight_ops stm_cs_ops = { diff --git a/drivers/hwtracing/coresight/coresight-tpda.c b/drivers/hwtracing/coresight/coresight-tpda.c index 189a4abc2561..d80b6427e5a6 100644 --- a/drivers/hwtracing/coresight/coresight-tpda.c +++ b/drivers/hwtracing/coresight/coresight-tpda.c @@ -241,9 +241,20 @@ static void tpda_disable(struct coresight_device *csdev, dev_dbg(drvdata->dev, "TPDA inport %d disabled\n", in->dest_port); } +static int tpda_trace_id(struct coresight_device *csdev, __maybe_unused enum cs_mode mode, + __maybe_unused struct coresight_device *sink) +{ + struct tpda_drvdata *drvdata; + + drvdata = dev_get_drvdata(csdev->dev.parent); + + return drvdata->atid; +} + static const struct coresight_ops_link tpda_link_ops = { .enable = tpda_enable, .disable = tpda_disable, + .trace_id = tpda_trace_id, }; static const struct coresight_ops tpda_cs_ops = { diff --git a/include/linux/coresight.h b/include/linux/coresight.h index 157c4bd009a1..70407d61262e 100644 --- a/include/linux/coresight.h +++ b/include/linux/coresight.h @@ -368,6 +368,7 @@ struct coresight_ops_sink { * Operations available for links. * @enable: enables flow between iport and oport. * @disable: disables flow between iport and oport. + * @trace_id: alloc or read the traceid. */ struct coresight_ops_link { int (*enable)(struct coresight_device *csdev, @@ -376,6 +377,8 @@ struct coresight_ops_link { void (*disable)(struct coresight_device *csdev, struct coresight_connection *in, struct coresight_connection *out); + int (*trace_id)(struct coresight_device *csdev, enum cs_mode mode, + struct coresight_device *sink); }; /** @@ -385,6 +388,7 @@ struct coresight_ops_link { * is associated to. * @enable: enables tracing for a source. * @disable: disables tracing for a source. + * @trace_id: alloc or read the traceid. */ struct coresight_ops_source { int (*cpu_id)(struct coresight_device *csdev); @@ -392,6 +396,8 @@ struct coresight_ops_source { enum cs_mode mode, struct coresight_trace_id_map *id_map); void (*disable)(struct coresight_device *csdev, struct perf_event *event); + int (*trace_id)(struct coresight_device *csdev, enum cs_mode mode, + struct coresight_device *sink); }; /** @@ -697,4 +703,6 @@ int coresight_init_driver(const char *drv, struct amba_driver *amba_drv, void coresight_remove_driver(struct amba_driver *amba_drv, struct platform_driver *pdev_drv); +int coresight_etm_get_trace_id(struct coresight_device *csdev, enum cs_mode mode, + struct coresight_device *sink); #endif /* _LINUX_COREISGHT_H */