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greybus: tracing: define bundle traces

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Define a new gb_bundle trace point event class, used to trace events
associated with the bundle abstraction.  Define four basic trace
points for this--creation time, drop of last reference, before
adding it to its interface and when removed when its interface
is destroyed.

Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Alex Elder 2016-06-03 15:55:36 -05:00 committed by Greg Kroah-Hartman
parent 6879dbf15e
commit 4f9c5c0bbb
2 changed files with 65 additions and 0 deletions
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9
drivers/staging/greybus/bundle.c
View file

@ -8,6 +8,7 @@
*/
#include "greybus.h"
#include "greybus_trace.h"
static ssize_t bundle_class_show(struct device *dev,
struct device_attribute *attr, char *buf)
@ -82,6 +83,8 @@ static void gb_bundle_release(struct device *dev)
{
struct gb_bundle *bundle = to_gb_bundle(dev);
trace_gb_bundle_release(bundle);
kfree(bundle->state);
kfree(bundle->cport_desc);
kfree(bundle);
@ -136,6 +139,8 @@ struct gb_bundle *gb_bundle_create(struct gb_interface *intf, u8 bundle_id,
list_add(&bundle->links, &intf->bundles);
trace_gb_bundle_create(bundle);
return bundle;
}
@ -149,6 +154,8 @@ int gb_bundle_add(struct gb_bundle *bundle)
return ret;
}
trace_gb_bundle_add(bundle);
return 0;
}
@ -157,6 +164,8 @@ int gb_bundle_add(struct gb_bundle *bundle)
*/
void gb_bundle_destroy(struct gb_bundle *bundle)
{
trace_gb_bundle_destroy(bundle);
if (device_is_registered(&bundle->dev))
device_del(&bundle->dev);

56
drivers/staging/greybus/greybus_trace.h
View file

@ -16,6 +16,7 @@
struct gb_message;
struct gb_operation;
struct gb_bundle;
struct gb_host_device;
#define gb_bundle_name(message) \
@ -161,6 +162,61 @@ DEFINE_OPERATION_EVENT(gb_operation_put_active);
#undef DEFINE_OPERATION_EVENT
DECLARE_EVENT_CLASS(gb_bundle,
TP_PROTO(struct gb_bundle *bundle),
TP_ARGS(bundle),
TP_STRUCT__entry(
__field(u8, intf_id)
__field(u8, id)
__field(u8, class)
__field(size_t, num_cports)
),
TP_fast_assign(
__entry->intf_id = bundle->intf->interface_id;
__entry->id = bundle->id;
__entry->class = bundle->class;
__entry->num_cports = bundle->num_cports;
),
TP_printk("intf_id=0x%02x id=%02x class=0x%02x num_cports=%zu",
__entry->intf_id, __entry->id, __entry->class,
__entry->num_cports)
);
#define DEFINE_BUNDLE_EVENT(name) \
DEFINE_EVENT(gb_bundle, name, \
TP_PROTO(struct gb_bundle *bundle), \
TP_ARGS(bundle))
/*
* Occurs after a new bundle is successfully created.
*/
DEFINE_BUNDLE_EVENT(gb_bundle_create);
/*
* Occurs when the last reference to a bundle has been dropped,
* before its resources are freed.
*/
DEFINE_BUNDLE_EVENT(gb_bundle_release);
/*
* Occurs when a bundle is added to an interface when the interface
* is enabled.
*/
DEFINE_BUNDLE_EVENT(gb_bundle_add);
/*
* Occurs when a registered bundle gets destroyed, normally at the
* time an interface is disabled.
*/
DEFINE_BUNDLE_EVENT(gb_bundle_destroy);
#undef DEFINE_BUNDLE_EVENT
DECLARE_EVENT_CLASS(gb_interface,
TP_PROTO(struct gb_interface *intf),