summaryrefslogtreecommitdiff
path: root/drivers/base
diff options
context:
space:
mode:
authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-08-27 01:41:47 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-08-27 01:41:47 +0200
commite894245c78b4d5b69074dc8d7f671770f513a4b6 (patch)
tree18824efee368b949865532bf9c478ab6031d3aae /drivers/base
parentce63e1862ce81d85df9e3239e4467ac765e04962 (diff)
parent536446772f1181f3afdf332780b5325d1b6980c6 (diff)
Merge branch 'pm-sleep'
* pm-sleep: PM / Sleep: new trace event to print device suspend and resume times PM / Sleep: increase ftrace coverage in suspend/resume
Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/power/main.c77
1 files changed, 43 insertions, 34 deletions
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 5a9b6569dd74..9f098a82cf04 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -28,6 +28,7 @@
#include <linux/sched.h>
#include <linux/async.h>
#include <linux/suspend.h>
+#include <trace/events/power.h>
#include <linux/cpuidle.h>
#include "../base.h"
#include "power.h"
@@ -56,6 +57,30 @@ static pm_message_t pm_transition;
static int async_error;
+static char *pm_verb(int event)
+{
+ switch (event) {
+ case PM_EVENT_SUSPEND:
+ return "suspend";
+ case PM_EVENT_RESUME:
+ return "resume";
+ case PM_EVENT_FREEZE:
+ return "freeze";
+ case PM_EVENT_QUIESCE:
+ return "quiesce";
+ case PM_EVENT_HIBERNATE:
+ return "hibernate";
+ case PM_EVENT_THAW:
+ return "thaw";
+ case PM_EVENT_RESTORE:
+ return "restore";
+ case PM_EVENT_RECOVER:
+ return "recover";
+ default:
+ return "(unknown PM event)";
+ }
+}
+
/**
* device_pm_sleep_init - Initialize system suspend-related device fields.
* @dev: Device object being initialized.
@@ -172,16 +197,21 @@ static ktime_t initcall_debug_start(struct device *dev)
}
static void initcall_debug_report(struct device *dev, ktime_t calltime,
- int error)
+ int error, pm_message_t state, char *info)
{
- ktime_t delta, rettime;
+ ktime_t rettime;
+ s64 nsecs;
+
+ rettime = ktime_get();
+ nsecs = (s64) ktime_to_ns(ktime_sub(rettime, calltime));
if (pm_print_times_enabled) {
- rettime = ktime_get();
- delta = ktime_sub(rettime, calltime);
pr_info("call %s+ returned %d after %Ld usecs\n", dev_name(dev),
- error, (unsigned long long)ktime_to_ns(delta) >> 10);
+ error, (unsigned long long)nsecs >> 10);
}
+
+ trace_device_pm_report_time(dev, info, nsecs, pm_verb(state.event),
+ error);
}
/**
@@ -309,30 +339,6 @@ static pm_callback_t pm_noirq_op(const struct dev_pm_ops *ops, pm_message_t stat
return NULL;
}
-static char *pm_verb(int event)
-{
- switch (event) {
- case PM_EVENT_SUSPEND:
- return "suspend";
- case PM_EVENT_RESUME:
- return "resume";
- case PM_EVENT_FREEZE:
- return "freeze";
- case PM_EVENT_QUIESCE:
- return "quiesce";
- case PM_EVENT_HIBERNATE:
- return "hibernate";
- case PM_EVENT_THAW:
- return "thaw";
- case PM_EVENT_RESTORE:
- return "restore";
- case PM_EVENT_RECOVER:
- return "recover";
- default:
- return "(unknown PM event)";
- }
-}
-
static void pm_dev_dbg(struct device *dev, pm_message_t state, char *info)
{
dev_dbg(dev, "%s%s%s\n", info, pm_verb(state.event),
@@ -379,7 +385,7 @@ static int dpm_run_callback(pm_callback_t cb, struct device *dev,
error = cb(dev);
suspend_report_result(cb, error);
- initcall_debug_report(dev, calltime, error);
+ initcall_debug_report(dev, calltime, error, state, info);
return error;
}
@@ -1027,7 +1033,8 @@ EXPORT_SYMBOL_GPL(dpm_suspend_end);
* @cb: Suspend callback to execute.
*/
static int legacy_suspend(struct device *dev, pm_message_t state,
- int (*cb)(struct device *dev, pm_message_t state))
+ int (*cb)(struct device *dev, pm_message_t state),
+ char *info)
{
int error;
ktime_t calltime;
@@ -1037,7 +1044,7 @@ static int legacy_suspend(struct device *dev, pm_message_t state,
error = cb(dev, state);
suspend_report_result(cb, error);
- initcall_debug_report(dev, calltime, error);
+ initcall_debug_report(dev, calltime, error, state, info);
return error;
}
@@ -1097,7 +1104,8 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async)
goto Run;
} else if (dev->class->suspend) {
pm_dev_dbg(dev, state, "legacy class ");
- error = legacy_suspend(dev, state, dev->class->suspend);
+ error = legacy_suspend(dev, state, dev->class->suspend,
+ "legacy class ");
goto End;
}
}
@@ -1108,7 +1116,8 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async)
callback = pm_op(dev->bus->pm, state);
} else if (dev->bus->suspend) {
pm_dev_dbg(dev, state, "legacy bus ");
- error = legacy_suspend(dev, state, dev->bus->suspend);
+ error = legacy_suspend(dev, state, dev->bus->suspend,
+ "legacy bus ");
goto End;
}
}