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path: root/drivers/base/power/main.c
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Diffstat (limited to 'drivers/base/power/main.c')
-rw-r--r--drivers/base/power/main.c128
1 files changed, 106 insertions, 22 deletions
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 1a216c114a0f..48adf80926a0 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -161,6 +161,32 @@ void device_pm_move_last(struct device *dev)
list_move_tail(&dev->power.entry, &dpm_list);
}
+static ktime_t initcall_debug_start(struct device *dev)
+{
+ ktime_t calltime = ktime_set(0, 0);
+
+ if (initcall_debug) {
+ pr_info("calling %s+ @ %i\n",
+ dev_name(dev), task_pid_nr(current));
+ calltime = ktime_get();
+ }
+
+ return calltime;
+}
+
+static void initcall_debug_report(struct device *dev, ktime_t calltime,
+ int error)
+{
+ ktime_t delta, rettime;
+
+ if (initcall_debug) {
+ 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);
+ }
+}
+
/**
* pm_op - Execute the PM operation appropriate for given PM event.
* @dev: Device to handle.
@@ -172,13 +198,9 @@ static int pm_op(struct device *dev,
pm_message_t state)
{
int error = 0;
- ktime_t calltime, delta, rettime;
+ ktime_t calltime;
- if (initcall_debug) {
- pr_info("calling %s+ @ %i\n",
- dev_name(dev), task_pid_nr(current));
- calltime = ktime_get();
- }
+ calltime = initcall_debug_start(dev);
switch (state.event) {
#ifdef CONFIG_SUSPEND
@@ -227,12 +249,7 @@ static int pm_op(struct device *dev,
error = -EINVAL;
}
- if (initcall_debug) {
- 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);
- }
+ initcall_debug_report(dev, calltime, error);
return error;
}
@@ -309,8 +326,9 @@ static int pm_noirq_op(struct device *dev,
if (initcall_debug) {
rettime = ktime_get();
delta = ktime_sub(rettime, calltime);
- printk("initcall %s_i+ returned %d after %Ld usecs\n", dev_name(dev),
- error, (unsigned long long)ktime_to_ns(delta) >> 10);
+ printk("initcall %s_i+ returned %d after %Ld usecs\n",
+ dev_name(dev), error,
+ (unsigned long long)ktime_to_ns(delta) >> 10);
}
return error;
@@ -354,6 +372,23 @@ static void pm_dev_err(struct device *dev, pm_message_t state, char *info,
kobject_name(&dev->kobj), pm_verb(state.event), info, error);
}
+static void dpm_show_time(ktime_t starttime, pm_message_t state, char *info)
+{
+ ktime_t calltime;
+ s64 usecs64;
+ int usecs;
+
+ calltime = ktime_get();
+ usecs64 = ktime_to_ns(ktime_sub(calltime, starttime));
+ do_div(usecs64, NSEC_PER_USEC);
+ usecs = usecs64;
+ if (usecs == 0)
+ usecs = 1;
+ pr_info("PM: %s%s%s of devices complete after %ld.%03ld msecs\n",
+ info ?: "", info ? " " : "", pm_verb(state.event),
+ usecs / USEC_PER_MSEC, usecs % USEC_PER_MSEC);
+}
+
/*------------------------- Resume routines -------------------------*/
/**
@@ -390,6 +425,7 @@ static int device_resume_noirq(struct device *dev, pm_message_t state)
void dpm_resume_noirq(pm_message_t state)
{
struct device *dev;
+ ktime_t starttime = ktime_get();
mutex_lock(&dpm_list_mtx);
transition_started = false;
@@ -403,11 +439,32 @@ void dpm_resume_noirq(pm_message_t state)
pm_dev_err(dev, state, " early", error);
}
mutex_unlock(&dpm_list_mtx);
+ dpm_show_time(starttime, state, "early");
resume_device_irqs();
}
EXPORT_SYMBOL_GPL(dpm_resume_noirq);
/**
+ * legacy_resume - Execute a legacy (bus or class) resume callback for device.
+ * dev: Device to resume.
+ * cb: Resume callback to execute.
+ */
+static int legacy_resume(struct device *dev, int (*cb)(struct device *dev))
+{
+ int error;
+ ktime_t calltime;
+
+ calltime = initcall_debug_start(dev);
+
+ error = cb(dev);
+ suspend_report_result(cb, error);
+
+ initcall_debug_report(dev, calltime, error);
+
+ return error;
+}
+
+/**
* device_resume - Execute "resume" callbacks for given device.
* @dev: Device to handle.
* @state: PM transition of the system being carried out.
@@ -427,7 +484,7 @@ static int device_resume(struct device *dev, pm_message_t state)
error = pm_op(dev, dev->bus->pm, state);
} else if (dev->bus->resume) {
pm_dev_dbg(dev, state, "legacy ");
- error = dev->bus->resume(dev);
+ error = legacy_resume(dev, dev->bus->resume);
}
if (error)
goto End;
@@ -448,7 +505,7 @@ static int device_resume(struct device *dev, pm_message_t state)
error = pm_op(dev, dev->class->pm, state);
} else if (dev->class->resume) {
pm_dev_dbg(dev, state, "legacy class ");
- error = dev->class->resume(dev);
+ error = legacy_resume(dev, dev->class->resume);
}
}
End:
@@ -468,6 +525,7 @@ static int device_resume(struct device *dev, pm_message_t state)
static void dpm_resume(pm_message_t state)
{
struct list_head list;
+ ktime_t starttime = ktime_get();
INIT_LIST_HEAD(&list);
mutex_lock(&dpm_list_mtx);
@@ -496,6 +554,7 @@ static void dpm_resume(pm_message_t state)
}
list_splice(&list, &dpm_list);
mutex_unlock(&dpm_list_mtx);
+ dpm_show_time(starttime, state, NULL);
}
/**
@@ -548,7 +607,7 @@ static void dpm_complete(pm_message_t state)
mutex_unlock(&dpm_list_mtx);
device_complete(dev, state);
- pm_runtime_put_noidle(dev);
+ pm_runtime_put_sync(dev);
mutex_lock(&dpm_list_mtx);
}
@@ -628,6 +687,7 @@ static int device_suspend_noirq(struct device *dev, pm_message_t state)
int dpm_suspend_noirq(pm_message_t state)
{
struct device *dev;
+ ktime_t starttime = ktime_get();
int error = 0;
suspend_device_irqs();
@@ -643,11 +703,34 @@ int dpm_suspend_noirq(pm_message_t state)
mutex_unlock(&dpm_list_mtx);
if (error)
dpm_resume_noirq(resume_event(state));
+ else
+ dpm_show_time(starttime, state, "late");
return error;
}
EXPORT_SYMBOL_GPL(dpm_suspend_noirq);
/**
+ * legacy_suspend - Execute a legacy (bus or class) suspend callback for device.
+ * dev: Device to suspend.
+ * 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 error;
+ ktime_t calltime;
+
+ calltime = initcall_debug_start(dev);
+
+ error = cb(dev, state);
+ suspend_report_result(cb, error);
+
+ initcall_debug_report(dev, calltime, error);
+
+ return error;
+}
+
+/**
* device_suspend - Execute "suspend" callbacks for given device.
* @dev: Device to handle.
* @state: PM transition of the system being carried out.
@@ -664,8 +747,7 @@ static int device_suspend(struct device *dev, pm_message_t state)
error = pm_op(dev, dev->class->pm, state);
} else if (dev->class->suspend) {
pm_dev_dbg(dev, state, "legacy class ");
- error = dev->class->suspend(dev, state);
- suspend_report_result(dev->class->suspend, error);
+ error = legacy_suspend(dev, state, dev->class->suspend);
}
if (error)
goto End;
@@ -686,8 +768,7 @@ static int device_suspend(struct device *dev, pm_message_t state)
error = pm_op(dev, dev->bus->pm, state);
} else if (dev->bus->suspend) {
pm_dev_dbg(dev, state, "legacy ");
- error = dev->bus->suspend(dev, state);
- suspend_report_result(dev->bus->suspend, error);
+ error = legacy_suspend(dev, state, dev->bus->suspend);
}
}
End:
@@ -703,6 +784,7 @@ static int device_suspend(struct device *dev, pm_message_t state)
static int dpm_suspend(pm_message_t state)
{
struct list_head list;
+ ktime_t starttime = ktime_get();
int error = 0;
INIT_LIST_HEAD(&list);
@@ -728,6 +810,8 @@ static int dpm_suspend(pm_message_t state)
}
list_splice(&list, dpm_list.prev);
mutex_unlock(&dpm_list_mtx);
+ if (!error)
+ dpm_show_time(starttime, state, NULL);
return error;
}
@@ -796,7 +880,7 @@ static int dpm_prepare(pm_message_t state)
pm_runtime_get_noresume(dev);
if (pm_runtime_barrier(dev) && device_may_wakeup(dev)) {
/* Wake-up requested during system sleep transition. */
- pm_runtime_put_noidle(dev);
+ pm_runtime_put_sync(dev);
error = -EBUSY;
} else {
error = device_prepare(dev, state);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 10:12:41 +0000