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Coresight: Add trace_id function to retrieving the trace ID

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Add 'trace_id' function pointer in coresight_ops. It's responsible for retrieving
the device's trace ID.

Co-developed-by: James Clark <james.clark@linaro.org>
Signed-off-by: James Clark <james.clark@linaro.org>
Reviewed-by: James Clark <james.clark@linaro.org>
Signed-off-by: Jie Gan <quic_jiegan@quicinc.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20250303032931.2500935-3-quic_jiegan@quicinc.com
This commit is contained in:
Jie Gan 2025-03-03 11:29:23 +08:00 committed by Suzuki K Poulose
parent dc872c5f52
commit c367a89dec
7 changed files with 71 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
drivers/hwtracing/coresight/coresight-core.c
View File

@ -24,6 +24,7 @@
#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
@ -1567,6 +1568,35 @@ 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:
if (WARN_ON(!sink))
return -EINVAL;
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 <pratikp@codeaurora.org>");
MODULE_AUTHOR("Mathieu Poirier <mathieu.poirier@linaro.org>");

13
drivers/hwtracing/coresight/coresight-dummy.c
View File

@ -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)
{
@ -62,7 +72,8 @@ static const struct coresight_ops_source dummy_source_ops = {
};
static const struct coresight_ops dummy_source_cs_ops = {
.source_ops = &dummy_source_ops,
.trace_id = dummy_source_trace_id,
.source_ops = &dummy_source_ops,
};
static const struct coresight_ops_sink dummy_sink_ops = {

1
drivers/hwtracing/coresight/coresight-etm3x-core.c
View File

@ -704,6 +704,7 @@ static const struct coresight_ops_source etm_source_ops = {
};
static const struct coresight_ops etm_cs_ops = {
.trace_id = coresight_etm_get_trace_id,
.source_ops = &etm_source_ops,
};

1
drivers/hwtracing/coresight/coresight-etm4x-core.c
View File

@ -1104,6 +1104,7 @@ static const struct coresight_ops_source etm4_source_ops = {
};
static const struct coresight_ops etm4_cs_ops = {
.trace_id = coresight_etm_get_trace_id,
.source_ops = &etm4_source_ops,
};

11
drivers/hwtracing/coresight/coresight-stm.c
View File

@ -281,12 +281,23 @@ 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,
};
static const struct coresight_ops stm_cs_ops = {
.trace_id = stm_trace_id,
.source_ops = &stm_source_ops,
};

11
drivers/hwtracing/coresight/coresight-tpda.c
View File

@ -242,12 +242,23 @@ 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,
};
static const struct coresight_ops tpda_cs_ops = {
.trace_id = tpda_trace_id,
.link_ops = &tpda_link_ops,
};

5
include/linux/coresight.h
View File

@ -335,6 +335,7 @@ enum cs_mode {
CS_MODE_PERF,
};
#define coresight_ops(csdev) csdev->ops
#define source_ops(csdev) csdev->ops->source_ops
#define sink_ops(csdev) csdev->ops->sink_ops
#define link_ops(csdev) csdev->ops->link_ops
@ -421,6 +422,8 @@ struct coresight_ops_panic {
};
struct coresight_ops {
int (*trace_id)(struct coresight_device *csdev, enum cs_mode mode,
struct coresight_device *sink);
const struct coresight_ops_sink *sink_ops;
const struct coresight_ops_link *link_ops;
const struct coresight_ops_source *source_ops;
@ -713,4 +716,6 @@ 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 */