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author | Rafael J. Wysocki <rjw@sisk.pl> | 2009-12-18 01:57:31 +0100 |
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committer | Rafael J. Wysocki <rjw@sisk.pl> | 2009-12-18 01:57:31 +0100 |
commit | 875ab0b74e85d6801a49392447d26e0b28688d86 (patch) | |
tree | 03762971d57d0657a12a99f1a73473878c2c7ada /drivers/base | |
parent | b8a7f3cd7e8212e5c572178ff3b5a514861036a5 (diff) | |
download | kernel_samsung_tuna-875ab0b74e85d6801a49392447d26e0b28688d86.zip kernel_samsung_tuna-875ab0b74e85d6801a49392447d26e0b28688d86.tar.gz kernel_samsung_tuna-875ab0b74e85d6801a49392447d26e0b28688d86.tar.bz2 |
PM: Make the initcall_debug style timing for suspend/resume complete
Commit f2511774863487e61b56a97da07ebf8dd61d7836
(PM: Add initcall_debug style timing for suspend/resume) introduced
basic timing instrumentation, needed for a scritps/bootgraph.pl
equivalent or humans, but it missed the fact that bus types and
device classes which haven't been switched to using struct dev_pm_ops
objects yet need special handling. As a result, the suspend/resume
timing information is only available for devices whose bus types or
device classes use struct dev_pm_ops objects, so the majority of
devices is not covered.
Fix this by adding basic suspend/resume timing instrumentation for
devices whose bus types and device classes still don't use struct
dev_pm_ops objects for power management. To reduce code duplication
move the timing code to helper functions.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'drivers/base')
-rw-r--r-- | drivers/base/power/main.c | 97 |
1 files changed, 77 insertions, 20 deletions
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c index 1a216c1..c448d59 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; @@ -408,6 +426,26 @@ void dpm_resume_noirq(pm_message_t state) 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 +465,7 @@ 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 +486,7 @@ 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: @@ -648,6 +686,27 @@ int dpm_suspend_noirq(pm_message_t state) 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 +723,7 @@ 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 +744,7 @@ 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: |