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Message-Id: <201106112236.50368.rjw@sisk.pl>
Date: Sat, 11 Jun 2011 22:36:50 +0200
From: "Rafael J. Wysocki" <rjw@...k.pl>
To: Linux PM mailing list <linux-pm@...ts.linux-foundation.org>
Cc: "Greg Kroah-Hartman" <gregkh@...e.de>,
Magnus Damm <magnus.damm@...il.com>,
Paul Walmsley <paul@...an.com>, Kevin Hilman <khilman@...com>,
Alan Stern <stern@...land.harvard.edu>,
LKML <linux-kernel@...r.kernel.org>, linux-sh@...r.kernel.org
Subject: [PATCH 5/8] PM: Introduce generic "noirq" callback routines for subsystems
From: Rafael J. Wysocki <rjw@...k.pl>
Introduce generic "noirq" power management callback routines for
subsystems in addition to the "regular" generic PM callback routines.
The new routines will be used, among other things, for implementing
system-wide PM transitions support for generic PM domains.
Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
---
drivers/base/power/generic_ops.c | 90 ++++++++++++++++++++++++++++++++-------
include/linux/pm.h | 6 ++
2 files changed, 82 insertions(+), 14 deletions(-)
Index: linux-2.6/drivers/base/power/generic_ops.c
===================================================================
--- linux-2.6.orig/drivers/base/power/generic_ops.c
+++ linux-2.6/drivers/base/power/generic_ops.c
@@ -94,12 +94,13 @@ int pm_generic_prepare(struct device *de
* __pm_generic_call - Generic suspend/freeze/poweroff/thaw subsystem callback.
* @dev: Device to handle.
* @event: PM transition of the system under way.
+ * @bool: Whether or not this is the "noirq" stage.
*
* If the device has not been suspended at run time, execute the
* suspend/freeze/poweroff/thaw callback provided by its driver, if defined, and
* return its error code. Otherwise, return zero.
*/
-static int __pm_generic_call(struct device *dev, int event)
+static int __pm_generic_call(struct device *dev, int event, bool noirq)
{
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
int (*callback)(struct device *);
@@ -109,16 +110,16 @@ static int __pm_generic_call(struct devi
switch (event) {
case PM_EVENT_SUSPEND:
- callback = pm->suspend;
+ callback = noirq ? pm->suspend_noirq : pm->suspend;
break;
case PM_EVENT_FREEZE:
- callback = pm->freeze;
+ callback = noirq ? pm->freeze_noirq : pm->freeze;
break;
case PM_EVENT_HIBERNATE:
- callback = pm->poweroff;
+ callback = noirq ? pm->poweroff_noirq : pm->poweroff;
break;
case PM_EVENT_THAW:
- callback = pm->thaw;
+ callback = noirq ? pm->thaw_noirq : pm->thaw;
break;
default:
callback = NULL;
@@ -129,42 +130,82 @@ static int __pm_generic_call(struct devi
}
/**
+ * pm_generic_suspend_noirq - Generic suspend_noirq callback for subsystems.
+ * @dev: Device to suspend.
+ */
+int pm_generic_suspend_noirq(struct device *dev)
+{
+ return __pm_generic_call(dev, PM_EVENT_SUSPEND, true);
+}
+EXPORT_SYMBOL_GPL(pm_generic_suspend_noirq);
+
+/**
* pm_generic_suspend - Generic suspend callback for subsystems.
* @dev: Device to suspend.
*/
int pm_generic_suspend(struct device *dev)
{
- return __pm_generic_call(dev, PM_EVENT_SUSPEND);
+ return __pm_generic_call(dev, PM_EVENT_SUSPEND, false);
}
EXPORT_SYMBOL_GPL(pm_generic_suspend);
/**
+ * pm_generic_freeze_noirq - Generic freeze_noirq callback for subsystems.
+ * @dev: Device to freeze.
+ */
+int pm_generic_freeze_noirq(struct device *dev)
+{
+ return __pm_generic_call(dev, PM_EVENT_FREEZE, true);
+}
+EXPORT_SYMBOL_GPL(pm_generic_freeze_noirq);
+
+/**
* pm_generic_freeze - Generic freeze callback for subsystems.
* @dev: Device to freeze.
*/
int pm_generic_freeze(struct device *dev)
{
- return __pm_generic_call(dev, PM_EVENT_FREEZE);
+ return __pm_generic_call(dev, PM_EVENT_FREEZE, false);
}
EXPORT_SYMBOL_GPL(pm_generic_freeze);
/**
+ * pm_generic_poweroff_noirq - Generic poweroff_noirq callback for subsystems.
+ * @dev: Device to handle.
+ */
+int pm_generic_poweroff_noirq(struct device *dev)
+{
+ return __pm_generic_call(dev, PM_EVENT_HIBERNATE, true);
+}
+EXPORT_SYMBOL_GPL(pm_generic_poweroff_noirq);
+
+/**
* pm_generic_poweroff - Generic poweroff callback for subsystems.
* @dev: Device to handle.
*/
int pm_generic_poweroff(struct device *dev)
{
- return __pm_generic_call(dev, PM_EVENT_HIBERNATE);
+ return __pm_generic_call(dev, PM_EVENT_HIBERNATE, false);
}
EXPORT_SYMBOL_GPL(pm_generic_poweroff);
/**
+ * pm_generic_thaw_noirq - Generic thaw_noirq callback for subsystems.
+ * @dev: Device to thaw.
+ */
+int pm_generic_thaw_noirq(struct device *dev)
+{
+ return __pm_generic_call(dev, PM_EVENT_THAW, true);
+}
+EXPORT_SYMBOL_GPL(pm_generic_thaw_noirq);
+
+/**
* pm_generic_thaw - Generic thaw callback for subsystems.
* @dev: Device to thaw.
*/
int pm_generic_thaw(struct device *dev)
{
- return __pm_generic_call(dev, PM_EVENT_THAW);
+ return __pm_generic_call(dev, PM_EVENT_THAW, false);
}
EXPORT_SYMBOL_GPL(pm_generic_thaw);
@@ -172,12 +213,13 @@ EXPORT_SYMBOL_GPL(pm_generic_thaw);
* __pm_generic_resume - Generic resume/restore callback for subsystems.
* @dev: Device to handle.
* @event: PM transition of the system under way.
+ * @bool: Whether or not this is the "noirq" stage.
*
* Execute the resume/resotre callback provided by the @dev's driver, if
* defined. If it returns 0, change the device's runtime PM status to 'active'.
* Return the callback's error code.
*/
-static int __pm_generic_resume(struct device *dev, int event)
+static int __pm_generic_resume(struct device *dev, int event, bool noirq)
{
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
int (*callback)(struct device *);
@@ -188,10 +230,10 @@ static int __pm_generic_resume(struct de
switch (event) {
case PM_EVENT_RESUME:
- callback = pm->resume;
+ callback = noirq ? pm->resume_noirq : pm->resume;
break;
case PM_EVENT_RESTORE:
- callback = pm->restore;
+ callback = noirq ? pm->restore_noirq : pm->restore;
break;
default:
callback = NULL;
@@ -212,22 +254,42 @@ static int __pm_generic_resume(struct de
}
/**
+ * pm_generic_resume_noirq - Generic resume_noirq callback for subsystems.
+ * @dev: Device to resume.
+ */
+int pm_generic_resume_noirq(struct device *dev)
+{
+ return __pm_generic_resume(dev, PM_EVENT_RESUME, true);
+}
+EXPORT_SYMBOL_GPL(pm_generic_resume_noirq);
+
+/**
* pm_generic_resume - Generic resume callback for subsystems.
* @dev: Device to resume.
*/
int pm_generic_resume(struct device *dev)
{
- return __pm_generic_resume(dev, PM_EVENT_RESUME);
+ return __pm_generic_resume(dev, PM_EVENT_RESUME, false);
}
EXPORT_SYMBOL_GPL(pm_generic_resume);
/**
+ * pm_generic_restore_noirq - Generic restore_noirq callback for subsystems.
+ * @dev: Device to restore.
+ */
+int pm_generic_restore_noirq(struct device *dev)
+{
+ return __pm_generic_resume(dev, PM_EVENT_RESTORE, true);
+}
+EXPORT_SYMBOL_GPL(pm_generic_restore_noirq);
+
+/**
* pm_generic_restore - Generic restore callback for subsystems.
* @dev: Device to restore.
*/
int pm_generic_restore(struct device *dev)
{
- return __pm_generic_resume(dev, PM_EVENT_RESTORE);
+ return __pm_generic_resume(dev, PM_EVENT_RESTORE, false);
}
EXPORT_SYMBOL_GPL(pm_generic_restore);
Index: linux-2.6/include/linux/pm.h
===================================================================
--- linux-2.6.orig/include/linux/pm.h
+++ linux-2.6/include/linux/pm.h
@@ -553,11 +553,17 @@ extern void __suspend_report_result(cons
extern int device_pm_wait_for_dev(struct device *sub, struct device *dev);
extern int pm_generic_prepare(struct device *dev);
+extern int pm_generic_suspend_noirq(struct device *dev);
extern int pm_generic_suspend(struct device *dev);
+extern int pm_generic_resume_noirq(struct device *dev);
extern int pm_generic_resume(struct device *dev);
+extern int pm_generic_freeze_noirq(struct device *dev);
extern int pm_generic_freeze(struct device *dev);
+extern int pm_generic_thaw_noirq(struct device *dev);
extern int pm_generic_thaw(struct device *dev);
+extern int pm_generic_restore_noirq(struct device *dev);
extern int pm_generic_restore(struct device *dev);
+extern int pm_generic_poweroff_noirq(struct device *dev);
extern int pm_generic_poweroff(struct device *dev);
extern void pm_generic_complete(struct device *dev);
--
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