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@xxxxxxxxxx>
Signed-off-by: James Clark <james.clark@xxxxxxxxxx>
Reviewed-by: James Clark <james.clark@xxxxxxxxxx>
Signed-off-by: Jie Gan <quic_jiegan@xxxxxxxxxxx>
---
drivers/hwtracing/coresight/coresight-core.c | 27 +++++++++++++++++++
drivers/hwtracing/coresight/coresight-dummy.c | 13 ++++++++-
.../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 | 5 ++++
7 files changed, 68 insertions(+), 1 deletion(-)
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 <pratikp@xxxxxxxxxxxxxx>");
MODULE_AUTHOR("Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>");
diff --git a/drivers/hwtracing/coresight/coresight-dummy.c b/drivers/hwtracing/coresight/coresight-dummy.c
index 9be53be8964b..b5692ba358c1 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)
{
@@ -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 = {
diff --git a/drivers/hwtracing/coresight/coresight-etm3x-core.c b/drivers/hwtracing/coresight/coresight-etm3x-core.c
index c103f4c70f5d..c1dda4bc4a2f 100644
--- a/drivers/hwtracing/coresight/coresight-etm3x-core.c
+++ b/drivers/hwtracing/coresight/coresight-etm3x-core.c
@@ -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,
};
diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c
index 2c1a60577728..cfd116b87460 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x-core.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c
@@ -1067,6 +1067,7 @@ 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,
};
diff --git a/drivers/hwtracing/coresight/coresight-stm.c b/drivers/hwtracing/coresight/coresight-stm.c
index b581a30a1cd9..aca25b5e3be2 100644
--- a/drivers/hwtracing/coresight/coresight-stm.c
+++ b/drivers/hwtracing/coresight/coresight-stm.c
@@ -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,
};
diff --git a/drivers/hwtracing/coresight/coresight-tpda.c b/drivers/hwtracing/coresight/coresight-tpda.c
index 189a4abc2561..68079169b11b 100644
--- a/drivers/hwtracing/coresight/coresight-tpda.c
+++ b/drivers/hwtracing/coresight/coresight-tpda.c
@@ -241,12 +241,23 @@ 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,
};
diff --git a/include/linux/coresight.h b/include/linux/coresight.h
index 157c4bd009a1..ce89ad24c2a2 100644
--- a/include/linux/coresight.h
+++ b/include/linux/coresight.h
@@ -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
@@ -410,6 +411,8 @@ struct coresight_ops_helper {
};
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;
@@ -697,4 +700,6 @@ 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 */
--
2.34.1
