From: Suzuki K Poulose <suzuki.poulose@arm.com> To: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org, mathieu.poirier@linaro.org, coresight@lists.linaro.org, suzuki.poulose@arm.com, robert.walker@arm.com, al.grant@arm.com Subject: [PATCH v2 06/14] coresight: etm3: Add support for handling errors Date: Thu, 6 Sep 2018 10:08:27 +0100 [thread overview] Message-ID: <1536224915-31766-7-git-send-email-suzuki.poulose@arm.com> (raw) In-Reply-To: <1536224915-31766-1-git-send-email-suzuki.poulose@arm.com> Add support for reporting errors back from the SMP cross function call for enabling ETM. Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> --- Changes since v1: - Fix build break, missing ;. (Mathieu Poirier) --- drivers/hwtracing/coresight/coresight-etm3x.c | 42 ++++++++++++++++++--------- 1 file changed, 28 insertions(+), 14 deletions(-) diff --git a/drivers/hwtracing/coresight/coresight-etm3x.c b/drivers/hwtracing/coresight/coresight-etm3x.c index 9ce8fba..206c238 100644 --- a/drivers/hwtracing/coresight/coresight-etm3x.c +++ b/drivers/hwtracing/coresight/coresight-etm3x.c @@ -355,11 +355,10 @@ static int etm_parse_event_config(struct etm_drvdata *drvdata, return 0; } -static void etm_enable_hw(void *info) +static int etm_enable_hw(struct etm_drvdata *drvdata) { int i; u32 etmcr; - struct etm_drvdata *drvdata = info; struct etm_config *config = &drvdata->config; CS_UNLOCK(drvdata->base); @@ -421,6 +420,21 @@ static void etm_enable_hw(void *info) CS_LOCK(drvdata->base); dev_dbg(drvdata->dev, "cpu: %d enable smp call done\n", drvdata->cpu); + return 0; +} + +struct etm_enable_arg { + struct etm_drvdata *drvdata; + int rc; +}; + +static void etm_enable_hw_smp_call(void *info) +{ + struct etm_enable_arg *arg = info; + + if (WARN_ON(!arg)) + return; + arg->rc = etm_enable_hw(arg->drvdata); } static int etm_cpu_id(struct coresight_device *csdev) @@ -475,14 +489,13 @@ static int etm_enable_perf(struct coresight_device *csdev, /* Configure the tracer based on the session's specifics */ etm_parse_event_config(drvdata, event); /* And enable it */ - etm_enable_hw(drvdata); - - return 0; + return etm_enable_hw(drvdata); } static int etm_enable_sysfs(struct coresight_device *csdev) { struct etm_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); + struct etm_enable_arg arg = { 0 }; int ret; spin_lock(&drvdata->spinlock); @@ -492,20 +505,21 @@ static int etm_enable_sysfs(struct coresight_device *csdev) * hw configuration will take place on the local CPU during bring up. */ if (cpu_online(drvdata->cpu)) { + arg.drvdata = drvdata; ret = smp_call_function_single(drvdata->cpu, - etm_enable_hw, drvdata, 1); - if (ret) - goto err; + etm_enable_hw_smp_call, &arg, 1); + if (!ret) + ret = arg.rc; + if (!ret) + drvdata->sticky_enable = true; + } else { + ret = -ENODEV; } - drvdata->sticky_enable = true; spin_unlock(&drvdata->spinlock); - dev_dbg(drvdata->dev, "ETM tracing enabled\n"); - return 0; - -err: - spin_unlock(&drvdata->spinlock); + if (!ret) + dev_dbg(drvdata->dev, "ETM tracing enabled\n"); return ret; } -- 2.7.4
WARNING: multiple messages have this Message-ID (diff)
From: suzuki.poulose@arm.com (Suzuki K Poulose) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 06/14] coresight: etm3: Add support for handling errors Date: Thu, 6 Sep 2018 10:08:27 +0100 [thread overview] Message-ID: <1536224915-31766-7-git-send-email-suzuki.poulose@arm.com> (raw) In-Reply-To: <1536224915-31766-1-git-send-email-suzuki.poulose@arm.com> Add support for reporting errors back from the SMP cross function call for enabling ETM. Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> --- Changes since v1: - Fix build break, missing ;. (Mathieu Poirier) --- drivers/hwtracing/coresight/coresight-etm3x.c | 42 ++++++++++++++++++--------- 1 file changed, 28 insertions(+), 14 deletions(-) diff --git a/drivers/hwtracing/coresight/coresight-etm3x.c b/drivers/hwtracing/coresight/coresight-etm3x.c index 9ce8fba..206c238 100644 --- a/drivers/hwtracing/coresight/coresight-etm3x.c +++ b/drivers/hwtracing/coresight/coresight-etm3x.c @@ -355,11 +355,10 @@ static int etm_parse_event_config(struct etm_drvdata *drvdata, return 0; } -static void etm_enable_hw(void *info) +static int etm_enable_hw(struct etm_drvdata *drvdata) { int i; u32 etmcr; - struct etm_drvdata *drvdata = info; struct etm_config *config = &drvdata->config; CS_UNLOCK(drvdata->base); @@ -421,6 +420,21 @@ static void etm_enable_hw(void *info) CS_LOCK(drvdata->base); dev_dbg(drvdata->dev, "cpu: %d enable smp call done\n", drvdata->cpu); + return 0; +} + +struct etm_enable_arg { + struct etm_drvdata *drvdata; + int rc; +}; + +static void etm_enable_hw_smp_call(void *info) +{ + struct etm_enable_arg *arg = info; + + if (WARN_ON(!arg)) + return; + arg->rc = etm_enable_hw(arg->drvdata); } static int etm_cpu_id(struct coresight_device *csdev) @@ -475,14 +489,13 @@ static int etm_enable_perf(struct coresight_device *csdev, /* Configure the tracer based on the session's specifics */ etm_parse_event_config(drvdata, event); /* And enable it */ - etm_enable_hw(drvdata); - - return 0; + return etm_enable_hw(drvdata); } static int etm_enable_sysfs(struct coresight_device *csdev) { struct etm_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); + struct etm_enable_arg arg = { 0 }; int ret; spin_lock(&drvdata->spinlock); @@ -492,20 +505,21 @@ static int etm_enable_sysfs(struct coresight_device *csdev) * hw configuration will take place on the local CPU during bring up. */ if (cpu_online(drvdata->cpu)) { + arg.drvdata = drvdata; ret = smp_call_function_single(drvdata->cpu, - etm_enable_hw, drvdata, 1); - if (ret) - goto err; + etm_enable_hw_smp_call, &arg, 1); + if (!ret) + ret = arg.rc; + if (!ret) + drvdata->sticky_enable = true; + } else { + ret = -ENODEV; } - drvdata->sticky_enable = true; spin_unlock(&drvdata->spinlock); - dev_dbg(drvdata->dev, "ETM tracing enabled\n"); - return 0; - -err: - spin_unlock(&drvdata->spinlock); + if (!ret) + dev_dbg(drvdata->dev, "ETM tracing enabled\n"); return ret; } -- 2.7.4
next prev parent reply other threads:[~2018-09-06 9:08 UTC|newest] Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-09-06 9:08 [PATCH v2 00/14] coresight: Implement device claim protocol Suzuki K Poulose 2018-09-06 9:08 ` Suzuki K Poulose 2018-09-06 9:08 ` [PATCH v2 01/14] coresight: Handle failures in enabling a trace path Suzuki K Poulose 2018-09-06 9:08 ` Suzuki K Poulose 2018-09-06 9:08 ` [PATCH v2 02/14] coresight: tmc-etr: Refactor for handling errors Suzuki K Poulose 2018-09-06 9:08 ` Suzuki K Poulose 2018-09-06 9:08 ` [PATCH v2 03/14] coresight: tmc-etr: Handle errors enabling CATU Suzuki K Poulose 2018-09-06 9:08 ` Suzuki K Poulose 2018-09-06 9:08 ` [PATCH v2 04/14] coresight: tmc-etb/etf: Prepare to handle errors enabling Suzuki K Poulose 2018-09-06 9:08 ` Suzuki K Poulose 2018-09-06 9:08 ` [PATCH v2 05/14] coresight: etm4x: Add support for handling errors Suzuki K Poulose 2018-09-06 9:08 ` Suzuki K Poulose 2018-09-06 9:08 ` Suzuki K Poulose [this message] 2018-09-06 9:08 ` [PATCH v2 06/14] coresight: etm3: " Suzuki K Poulose 2018-09-06 9:08 ` [PATCH v2 07/14] coresight: etb10: Handle errors enabling the device Suzuki K Poulose 2018-09-06 9:08 ` Suzuki K Poulose 2018-09-06 9:08 ` [PATCH v2 08/14] coresight: dynamic-replicator: Handle multiple connections Suzuki K Poulose 2018-09-06 9:08 ` Suzuki K Poulose 2018-09-06 9:08 ` [PATCH v2 09/14] coresight: Add support for CLAIM tag protocol Suzuki K Poulose 2018-09-06 9:08 ` Suzuki K Poulose 2018-09-06 9:08 ` [PATCH v2 10/14] coresight: etmx: Claim devices before use Suzuki K Poulose 2018-09-06 9:08 ` Suzuki K Poulose 2018-09-06 9:08 ` [PATCH v2 11/14] coresight: funnel: " Suzuki K Poulose 2018-09-06 9:08 ` Suzuki K Poulose 2018-09-06 9:08 ` [PATCH v2 12/14] coresight: catu: Claim device " Suzuki K Poulose 2018-09-06 9:08 ` Suzuki K Poulose 2018-09-06 9:08 ` [PATCH v2 13/14] coresight: dynamic-replicator: Claim device for use Suzuki K Poulose 2018-09-06 9:08 ` Suzuki K Poulose 2018-09-06 9:08 ` [PATCH v2 14/14] coreisght: tmc: Claim device before use Suzuki K Poulose 2018-09-06 9:08 ` Suzuki K Poulose 2018-09-12 19:42 ` [PATCH v2 00/14] coresight: Implement device claim protocol Mathieu Poirier 2018-09-12 19:42 ` Mathieu Poirier
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