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Coresight: Change functions to accept the coresight_path

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Modify following functions to accept the coresight_path. Devices in the path
can read data from coresight_path if needed.
 - coresight_enable_path
 - coresight_disable_path
 - coresight_get_source
 - coresight_get_sink
 - coresight_enable_helpers
 - coresight_disable_helpers

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/20250303032931.2500935-8-quic_jiegan@quicinc.com
This commit is contained in:
Jie Gan 2025-03-03 11:29:28 +08:00 committed by Suzuki K Poulose
parent 7b365f056d
commit 080ee83cc3
4 changed files with 32 additions and 33 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

37
drivers/hwtracing/coresight/coresight-core.c
View file

@ -77,14 +77,14 @@ struct coresight_device *coresight_get_percpu_sink(int cpu)
}
EXPORT_SYMBOL_GPL(coresight_get_percpu_sink);
static struct coresight_device *coresight_get_source(struct list_head *path)
static struct coresight_device *coresight_get_source(struct coresight_path *path)
{
struct coresight_device *csdev;
if (!path)
return NULL;
csdev = list_first_entry(path, struct coresight_node, link)->csdev;
csdev = list_first_entry(&path->path_list, struct coresight_node, link)->csdev;
if (!coresight_is_device_source(csdev))
return NULL;
@ -333,12 +333,12 @@ static int coresight_enable_helper(struct coresight_device *csdev,
return helper_ops(csdev)->enable(csdev, mode, data);
}
static void coresight_disable_helper(struct coresight_device *csdev)
static void coresight_disable_helper(struct coresight_device *csdev, void *data)
{
helper_ops(csdev)->disable(csdev, NULL);
helper_ops(csdev)->disable(csdev, data);
}
static void coresight_disable_helpers(struct coresight_device *csdev)
static void coresight_disable_helpers(struct coresight_device *csdev, void *data)
{
int i;
struct coresight_device *helper;
@ -346,7 +346,7 @@ static void coresight_disable_helpers(struct coresight_device *csdev)
for (i = 0; i < csdev->pdata->nr_outconns; ++i) {
helper = csdev->pdata->out_conns[i]->dest_dev;
if (helper && coresight_is_helper(helper))
coresight_disable_helper(helper);
coresight_disable_helper(helper, data);
}
}
@ -363,7 +363,7 @@ static void coresight_disable_helpers(struct coresight_device *csdev)
void coresight_disable_source(struct coresight_device *csdev, void *data)
{
source_ops(csdev)->disable(csdev, data);
coresight_disable_helpers(csdev);
coresight_disable_helpers(csdev, NULL);
}
EXPORT_SYMBOL_GPL(coresight_disable_source);
@ -372,16 +372,16 @@ EXPORT_SYMBOL_GPL(coresight_disable_source);
* @nd in the list. If @nd is NULL, all the components, except the SOURCE are
* disabled.
*/
static void coresight_disable_path_from(struct list_head *path,
static void coresight_disable_path_from(struct coresight_path *path,
struct coresight_node *nd)
{
u32 type;
struct coresight_device *csdev, *parent, *child;
if (!nd)
nd = list_first_entry(path, struct coresight_node, link);
nd = list_first_entry(&path->path_list, struct coresight_node, link);
list_for_each_entry_continue(nd, path, link) {
list_for_each_entry_continue(nd, &path->path_list, link) {
csdev = nd->csdev;
type = csdev->type;
@ -419,11 +419,11 @@ static void coresight_disable_path_from(struct list_head *path,
}
/* Disable all helpers adjacent along the path last */
coresight_disable_helpers(csdev);
coresight_disable_helpers(csdev, path);
}
}
void coresight_disable_path(struct list_head *path)
void coresight_disable_path(struct coresight_path *path)
{
coresight_disable_path_from(path, NULL);
}
@ -448,7 +448,7 @@ static int coresight_enable_helpers(struct coresight_device *csdev,
return 0;
}
int coresight_enable_path(struct list_head *path, enum cs_mode mode,
int coresight_enable_path(struct coresight_path *path, enum cs_mode mode,
void *sink_data)
{
int ret = 0;
@ -458,12 +458,12 @@ int coresight_enable_path(struct list_head *path, enum cs_mode mode,
struct coresight_device *source;
source = coresight_get_source(path);
list_for_each_entry_reverse(nd, path, link) {
list_for_each_entry_reverse(nd, &path->path_list, link) {
csdev = nd->csdev;
type = csdev->type;
/* Enable all helpers adjacent to the path first */
ret = coresight_enable_helpers(csdev, mode, sink_data);
ret = coresight_enable_helpers(csdev, mode, path);
if (ret)
goto err;
/*
@ -511,20 +511,21 @@ int coresight_enable_path(struct list_head *path, enum cs_mode mode,
goto out;
}
struct coresight_device *coresight_get_sink(struct list_head *path)
struct coresight_device *coresight_get_sink(struct coresight_path *path)
{
struct coresight_device *csdev;
if (!path)
return NULL;
csdev = list_last_entry(path, struct coresight_node, link)->csdev;
csdev = list_last_entry(&path->path_list, struct coresight_node, link)->csdev;
if (csdev->type != CORESIGHT_DEV_TYPE_SINK &&
csdev->type != CORESIGHT_DEV_TYPE_LINKSINK)
return NULL;
return csdev;
}
EXPORT_SYMBOL_GPL(coresight_get_sink);
u32 coresight_get_sink_id(struct coresight_device *csdev)
{
@ -680,7 +681,7 @@ static int coresight_get_trace_id(struct coresight_device *csdev,
void coresight_path_assign_trace_id(struct coresight_path *path,
enum cs_mode mode)
{
struct coresight_device *sink = coresight_get_sink(&path->path_list);
struct coresight_device *sink = coresight_get_sink(path);
struct coresight_node *nd;
int trace_id;

16
drivers/hwtracing/coresight/coresight-etm-perf.c
View file

@ -197,7 +197,6 @@ static void free_sink_buffer(struct etm_event_data *event_data)
int cpu;
cpumask_t *mask = &event_data->mask;
struct coresight_device *sink;
struct coresight_path *path;
if (!event_data->snk_config)
return;
@ -206,8 +205,7 @@ static void free_sink_buffer(struct etm_event_data *event_data)
return;
cpu = cpumask_first(mask);
path = etm_event_cpu_path(event_data, cpu);
sink = coresight_get_sink(&path->path_list);
sink = coresight_get_sink(etm_event_cpu_path(event_data, cpu));
sink_ops(sink)->free_buffer(event_data->snk_config);
}
@ -232,7 +230,7 @@ static void free_event_data(struct work_struct *work)
ppath = etm_event_cpu_path_ptr(event_data, cpu);
if (!(IS_ERR_OR_NULL(*ppath))) {
struct coresight_device *sink = coresight_get_sink(&((*ppath)->path_list));
struct coresight_device *sink = coresight_get_sink(*ppath);
/*
* Mark perf event as done for trace id allocator, but don't call
@ -494,12 +492,12 @@ static void etm_event_start(struct perf_event *event, int flags)
path = etm_event_cpu_path(event_data, cpu);
/* We need a sink, no need to continue without one */
sink = coresight_get_sink(&path->path_list);
sink = coresight_get_sink(path);
if (WARN_ON_ONCE(!sink))
goto fail_end_stop;
/* Nothing will happen without a path */
if (coresight_enable_path(&path->path_list, CS_MODE_PERF, handle))
if (coresight_enable_path(path, CS_MODE_PERF, handle))
goto fail_end_stop;
/* Finally enable the tracer */
@ -531,7 +529,7 @@ static void etm_event_start(struct perf_event *event, int flags)
return;
fail_disable_path:
coresight_disable_path(&path->path_list);
coresight_disable_path(path);
fail_end_stop:
/*
* Check if the handle is still associated with the event,
@ -596,7 +594,7 @@ static void etm_event_stop(struct perf_event *event, int mode)
if (!path)
return;
sink = coresight_get_sink(&path->path_list);
sink = coresight_get_sink(path);
if (!sink)
return;
@ -640,7 +638,7 @@ static void etm_event_stop(struct perf_event *event, int mode)
}
/* Disabling the path make its elements available to other sessions */
coresight_disable_path(&path->path_list);
coresight_disable_path(path);
}
static int etm_event_add(struct perf_event *event, int mode)

6
drivers/hwtracing/coresight/coresight-priv.h
View file

@ -132,10 +132,10 @@ static inline void CS_UNLOCK(void __iomem *addr)
} while (0);
}
void coresight_disable_path(struct list_head *path);
int coresight_enable_path(struct list_head *path, enum cs_mode mode,
void coresight_disable_path(struct coresight_path *path);
int coresight_enable_path(struct coresight_path *path, enum cs_mode mode,
void *sink_data);
struct coresight_device *coresight_get_sink(struct list_head *path);
struct coresight_device *coresight_get_sink(struct coresight_path *path);
struct coresight_device *coresight_get_sink_by_id(u32 id);
struct coresight_device *
coresight_find_default_sink(struct coresight_device *csdev);

6
drivers/hwtracing/coresight/coresight-sysfs.c
View file

@ -214,7 +214,7 @@ int coresight_enable_sysfs(struct coresight_device *csdev)
if (!IS_VALID_CS_TRACE_ID(path->trace_id))
goto err_path;
ret = coresight_enable_path(&path->path_list, CS_MODE_SYSFS, NULL);
ret = coresight_enable_path(path, CS_MODE_SYSFS, NULL);
if (ret)
goto err_path;
@ -256,7 +256,7 @@ int coresight_enable_sysfs(struct coresight_device *csdev)
return ret;
err_source:
coresight_disable_path(&path->path_list);
coresight_disable_path(path);
err_path:
coresight_release_path(path);
@ -302,7 +302,7 @@ void coresight_disable_sysfs(struct coresight_device *csdev)
break;
}
coresight_disable_path(&path->path_list);
coresight_disable_path(path);
coresight_release_path(path);
out: