[1/3] coresight: Don't save handle in path

Message ID	20250131163617.1730505-2-james.clark@linaro.org (mailing list archive)
State	New
Headers	show Return-Path: <linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org> From: James Clark <james.clark@linaro.org> To: quic_jiegan@quicinc.com Cc: quic_tingweiz@quicinc.com, quic_jinlmao@quicinc.com, coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, suzuki.poulose@arm.com, mike.leach@linaro.org, alexander.shishkin@linux.intel.com, mcoquelin.stm32@gmail.com, alexandre.torgue@foss.st.com, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, andersson@kernel.org, konradybcio@kernel.org, James Clark <james.clark@linaro.org> Subject: [PATCH 1/3] coresight: Don't save handle in path Date: Fri, 31 Jan 2025 16:36:13 +0000 Message-Id: <20250131163617.1730505-2-james.clark@linaro.org> In-Reply-To: <20250131163617.1730505-1-james.clark@linaro.org> References: <d5332d6d-237f-4b78-9eaf-2619bd97b7bd@quicinc.com> <20250131163617.1730505-1-james.clark@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: list Sender: "linux-arm-kernel" <linux-arm-kernel-bounces@lists.infradead.org> Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org
Series	[1/3] coresight: Don't save handle in path \| expand [1/3] coresight: Don't save handle in path [2/3] coresight: Export coresight_get_sink() [3/3] coresight: Alloc trace ID after building the path

diff --git a/drivers/hwtracing/coresight/coresight-core.c b/drivers/hwtracing/coresight/coresight-core.c index 11d5d5320b1a..253ef02fde12 100644 --- a/drivers/hwtracing/coresight/coresight-core.c +++ b/drivers/hwtracing/coresight/coresight-core.c @@ -272,9 +272,9 @@ void coresight_add_helper(struct coresight_device *csdev, EXPORT_SYMBOL_GPL(coresight_add_helper); static int coresight_enable_sink(struct coresight_device *csdev, - enum cs_mode mode, void *data) + enum cs_mode mode, struct perf_output_handle *handle) { - return sink_ops(csdev)->enable(csdev, mode, data); + return sink_ops(csdev)->enable(csdev, mode, handle); } static void coresight_disable_sink(struct coresight_device *csdev) @@ -448,7 +448,8 @@ static int coresight_enable_helpers(struct coresight_device *csdev, return 0; } -int coresight_enable_path(struct coresight_path *cs_path, enum cs_mode mode) +int coresight_enable_path(struct coresight_path *cs_path, enum cs_mode mode, + struct perf_output_handle *handle) { int ret = 0; u32 type; @@ -479,7 +480,7 @@ int coresight_enable_path(struct coresight_path *cs_path, enum cs_mode mode) switch (type) { case CORESIGHT_DEV_TYPE_SINK: - ret = coresight_enable_sink(csdev, mode, cs_path); + ret = coresight_enable_sink(csdev, mode, handle); /* * Sink is the first component turned on. If we * failed to enable the sink, there are no components @@ -807,7 +808,6 @@ void coresight_release_path(struct coresight_path *cs_path) kfree(nd); } - cs_path->handle = NULL; kfree(cs_path->path); kfree(cs_path); } diff --git a/drivers/hwtracing/coresight/coresight-dummy.c b/drivers/hwtracing/coresight/coresight-dummy.c index dfcf24e9c49a..6f86d33efef4 100644 --- a/drivers/hwtracing/coresight/coresight-dummy.c +++ b/drivers/hwtracing/coresight/coresight-dummy.c @@ -54,7 +54,7 @@ static int dummy_source_trace_id(struct coresight_device *csdev, enum cs_mode mo } static int dummy_sink_enable(struct coresight_device *csdev, enum cs_mode mode, - void *data) + struct perf_output_handle *handle) { dev_dbg(csdev->dev.parent, "Dummy sink enabled\n"); diff --git a/drivers/hwtracing/coresight/coresight-etb10.c b/drivers/hwtracing/coresight/coresight-etb10.c index 05430d8931d1..e373b0f590bf 100644 --- a/drivers/hwtracing/coresight/coresight-etb10.c +++ b/drivers/hwtracing/coresight/coresight-etb10.c @@ -167,14 +167,12 @@ static int etb_enable_sysfs(struct coresight_device *csdev) return ret; } -static int etb_enable_perf(struct coresight_device *csdev, void *data) +static int etb_enable_perf(struct coresight_device *csdev, struct perf_output_handle *handle) { int ret = 0; pid_t pid; unsigned long flags; struct etb_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); - struct coresight_path *cs_path = (struct coresight_path *)data; - struct perf_output_handle *handle = cs_path->handle; struct cs_buffers *buf = etm_perf_sink_config(handle); spin_lock_irqsave(&drvdata->spinlock, flags); @@ -225,7 +223,7 @@ static int etb_enable_perf(struct coresight_device *csdev, void *data) } static int etb_enable(struct coresight_device *csdev, enum cs_mode mode, - void *data) + struct perf_output_handle *handle) { int ret; @@ -234,7 +232,7 @@ static int etb_enable(struct coresight_device *csdev, enum cs_mode mode, ret = etb_enable_sysfs(csdev); break; case CS_MODE_PERF: - ret = etb_enable_perf(csdev, data); + ret = etb_enable_perf(csdev, handle); break; default: ret = -EINVAL; diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.c b/drivers/hwtracing/coresight/coresight-etm-perf.c index b6765abb0a26..0fad9968c2c0 100644 --- a/drivers/hwtracing/coresight/coresight-etm-perf.c +++ b/drivers/hwtracing/coresight/coresight-etm-perf.c @@ -501,9 +501,8 @@ static void etm_event_start(struct perf_event *event, int flags) if (WARN_ON_ONCE(!sink)) goto fail_end_stop; - cs_path->handle = handle; /* Nothing will happen without a path */ - if (coresight_enable_path(cs_path, CS_MODE_PERF)) + if (coresight_enable_path(cs_path, CS_MODE_PERF, handle)) goto fail_end_stop; /* Finally enable the tracer */ diff --git a/drivers/hwtracing/coresight/coresight-priv.h b/drivers/hwtracing/coresight/coresight-priv.h index 8e02a222b9f8..7bd43304f461 100644 --- a/drivers/hwtracing/coresight/coresight-priv.h +++ b/drivers/hwtracing/coresight/coresight-priv.h @@ -112,7 +112,6 @@ struct cs_buffers { * @trace_id: trace_id of the whole path. */ struct coresight_path { - struct perf_output_handle *handle; struct list_head *path; u8 trace_id; }; @@ -142,7 +141,8 @@ static inline void CS_UNLOCK(void __iomem *addr) } void coresight_disable_path(struct coresight_path *cs_path); -int coresight_enable_path(struct coresight_path *cs_path, enum cs_mode mode); +int coresight_enable_path(struct coresight_path *cs_path, enum cs_mode mode, + struct perf_output_handle *handle); struct coresight_device *coresight_get_sink(struct list_head *path); struct coresight_device *coresight_get_sink_by_id(u32 id); struct coresight_device * diff --git a/drivers/hwtracing/coresight/coresight-sysfs.c b/drivers/hwtracing/coresight/coresight-sysfs.c index 04e76cc1bfdf..f9a6b838726c 100644 --- a/drivers/hwtracing/coresight/coresight-sysfs.c +++ b/drivers/hwtracing/coresight/coresight-sysfs.c @@ -209,7 +209,7 @@ int coresight_enable_sysfs(struct coresight_device *csdev) goto out; } - ret = coresight_enable_path(cs_path, CS_MODE_SYSFS); + ret = coresight_enable_path(cs_path, CS_MODE_SYSFS, NULL); if (ret) goto err_path; diff --git a/drivers/hwtracing/coresight/coresight-tmc-etf.c b/drivers/hwtracing/coresight/coresight-tmc-etf.c index e6b07f917556..fdf1c2511d67 100644 --- a/drivers/hwtracing/coresight/coresight-tmc-etf.c +++ b/drivers/hwtracing/coresight/coresight-tmc-etf.c @@ -244,14 +244,13 @@ static int tmc_enable_etf_sink_sysfs(struct coresight_device *csdev) return ret; } -static int tmc_enable_etf_sink_perf(struct coresight_device *csdev, void *data) +static int tmc_enable_etf_sink_perf(struct coresight_device *csdev, + struct perf_output_handle *handle) { int ret = 0; pid_t pid; unsigned long flags; struct tmc_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); - struct coresight_path *cs_path= (struct coresight_path *)data; - struct perf_output_handle *handle = cs_path->handle; struct cs_buffers *buf = etm_perf_sink_config(handle); spin_lock_irqsave(&drvdata->spinlock, flags); @@ -303,7 +302,7 @@ static int tmc_enable_etf_sink_perf(struct coresight_device *csdev, void *data) } static int tmc_enable_etf_sink(struct coresight_device *csdev, - enum cs_mode mode, void *data) + enum cs_mode mode, struct perf_output_handle *handle) { int ret; @@ -312,7 +311,7 @@ static int tmc_enable_etf_sink(struct coresight_device *csdev, ret = tmc_enable_etf_sink_sysfs(csdev); break; case CS_MODE_PERF: - ret = tmc_enable_etf_sink_perf(csdev, data); + ret = tmc_enable_etf_sink_perf(csdev, handle); break; /* We shouldn't be here */ default: diff --git a/drivers/hwtracing/coresight/coresight-tmc-etr.c b/drivers/hwtracing/coresight/coresight-tmc-etr.c index 82a872882e24..2d0bd06bab2a 100644 --- a/drivers/hwtracing/coresight/coresight-tmc-etr.c +++ b/drivers/hwtracing/coresight/coresight-tmc-etr.c @@ -1252,10 +1252,8 @@ static int tmc_enable_etr_sink_sysfs(struct coresight_device *csdev) } struct etr_buf *tmc_etr_get_buffer(struct coresight_device *csdev, - enum cs_mode mode, void *data) + enum cs_mode mode, struct perf_output_handle *handle) { - struct coresight_path *cs_path = (struct coresight_path *)data; - struct perf_output_handle *handle = cs_path->handle; struct etr_perf_buffer *etr_perf; switch (mode) { @@ -1643,14 +1641,13 @@ tmc_update_etr_buffer(struct coresight_device *csdev, return size; } -static int tmc_enable_etr_sink_perf(struct coresight_device *csdev, void *data) +static int tmc_enable_etr_sink_perf(struct coresight_device *csdev, + struct perf_output_handle *handle) { int rc = 0; pid_t pid; unsigned long flags; struct tmc_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); - struct coresight_path *cs_path = (struct coresight_path *)data; - struct perf_output_handle *handle = cs_path->handle; struct etr_perf_buffer *etr_perf = etm_perf_sink_config(handle); spin_lock_irqsave(&drvdata->spinlock, flags); @@ -1698,13 +1695,13 @@ static int tmc_enable_etr_sink_perf(struct coresight_device *csdev, void *data) } static int tmc_enable_etr_sink(struct coresight_device *csdev, - enum cs_mode mode, void *data) + enum cs_mode mode, struct perf_output_handle *handle) { switch (mode) { case CS_MODE_SYSFS: return tmc_enable_etr_sink_sysfs(csdev); case CS_MODE_PERF: - return tmc_enable_etr_sink_perf(csdev, data); + return tmc_enable_etr_sink_perf(csdev, handle); default: return -EINVAL; } diff --git a/drivers/hwtracing/coresight/coresight-tmc.h b/drivers/hwtracing/coresight/coresight-tmc.h index 2671926be62a..e991afd43742 100644 --- a/drivers/hwtracing/coresight/coresight-tmc.h +++ b/drivers/hwtracing/coresight/coresight-tmc.h @@ -336,7 +336,7 @@ struct coresight_device *tmc_etr_get_catu_device(struct tmc_drvdata *drvdata); void tmc_etr_set_catu_ops(const struct etr_buf_operations *catu); void tmc_etr_remove_catu_ops(void); struct etr_buf *tmc_etr_get_buffer(struct coresight_device *csdev, - enum cs_mode mode, void *data); + enum cs_mode mode, struct perf_output_handle *handle); extern const struct attribute_group coresight_etr_group; #endif diff --git a/drivers/hwtracing/coresight/coresight-tpiu.c b/drivers/hwtracing/coresight/coresight-tpiu.c index 97ef36f03ec2..ccf463ac7bf5 100644 --- a/drivers/hwtracing/coresight/coresight-tpiu.c +++ b/drivers/hwtracing/coresight/coresight-tpiu.c @@ -75,7 +75,7 @@ static void tpiu_enable_hw(struct csdev_access *csa) } static int tpiu_enable(struct coresight_device *csdev, enum cs_mode mode, - void *__unused) + struct perf_output_handle *__unused) { struct tpiu_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); diff --git a/drivers/hwtracing/coresight/coresight-trbe.c b/drivers/hwtracing/coresight/coresight-trbe.c index 5005efd88a66..997d5976d2d2 100644 --- a/drivers/hwtracing/coresight/coresight-trbe.c +++ b/drivers/hwtracing/coresight/coresight-trbe.c @@ -1009,12 +1009,10 @@ static int __arm_trbe_enable(struct trbe_buf *buf, } static int arm_trbe_enable(struct coresight_device *csdev, enum cs_mode mode, - void *data) + struct perf_output_handle *handle) { struct trbe_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); struct trbe_cpudata *cpudata = dev_get_drvdata(&csdev->dev); - struct coresight_path *cs_path = (struct coresight_path *)data; - struct perf_output_handle *handle = cs_path->handle; struct trbe_buf *buf = etm_perf_sink_config(handle); WARN_ON(cpudata->cpu != smp_processor_id()); diff --git a/drivers/hwtracing/coresight/ultrasoc-smb.c b/drivers/hwtracing/coresight/ultrasoc-smb.c index 9be88394b3bb..1574b5067206 100644 --- a/drivers/hwtracing/coresight/ultrasoc-smb.c +++ b/drivers/hwtracing/coresight/ultrasoc-smb.c @@ -213,11 +213,9 @@ static void smb_enable_sysfs(struct coresight_device *csdev) coresight_set_mode(csdev, CS_MODE_SYSFS); } -static int smb_enable_perf(struct coresight_device *csdev, void *data) +static int smb_enable_perf(struct coresight_device *csdev, struct perf_output_handle *handle) { struct smb_drv_data *drvdata = dev_get_drvdata(csdev->dev.parent); - struct coresight_path *cs_path = (struct coresight_path *)data; - struct perf_output_handle *handle = cs_path->handle; struct cs_buffers *buf = etm_perf_sink_config(handle); pid_t pid; @@ -241,7 +239,7 @@ static int smb_enable_perf(struct coresight_device *csdev, void *data) } static int smb_enable(struct coresight_device *csdev, enum cs_mode mode, - void *data) + struct perf_output_handle *handle) { struct smb_drv_data *drvdata = dev_get_drvdata(csdev->dev.parent); int ret = 0; @@ -262,7 +260,7 @@ static int smb_enable(struct coresight_device *csdev, enum cs_mode mode, smb_enable_sysfs(csdev); break; case CS_MODE_PERF: - ret = smb_enable_perf(csdev, data); + ret = smb_enable_perf(csdev, handle); break; default: ret = -EINVAL; diff --git a/include/linux/coresight.h b/include/linux/coresight.h index 87f9baa7fefe..a859fc00eef9 100644 --- a/include/linux/coresight.h +++ b/include/linux/coresight.h @@ -353,7 +353,7 @@ enum cs_mode { */ struct coresight_ops_sink { int (*enable)(struct coresight_device *csdev, enum cs_mode mode, - void *data); + struct perf_output_handle *handle); int (*disable)(struct coresight_device *csdev); void *(*alloc_buffer)(struct coresight_device *csdev, struct perf_event *event, void **pages,

[1/3] coresight: Don't save handle in path

Commit Message

Patch