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Message-Id: <200803270006.49193.rjw@sisk.pl>
Date: Thu, 27 Mar 2008 00:06:48 +0100
From: "Rafael J. Wysocki" <rjw@...k.pl>
To: pm list <linux-pm@...ts.linux-foundation.org>
Cc: ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
Alan Stern <stern@...land.harvard.edu>,
Greg KH <greg@...ah.com>, Len Brown <lenb@...nel.org>,
LKML <linux-kernel@...r.kernel.org>,
Alexey Starikovskiy <astarikovskiy@...e.de>,
David Brownell <david-b@...bell.net>,
Pavel Machek <pavel@....cz>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Oliver Neukum <oliver@...kum.org>
Subject: [RFC][PATCH 3/3] PM: New suspend and hibernation callbacks for PCI bus type (rev. 2)
From: Rafael J. Wysocki <rjw@...k.pl>
Implement new suspend and hibernation callbacks for the PCI bus type.
Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
---
drivers/pci/pci-driver.c | 387 +++++++++++++++++++++++++++++++++++++++++------
include/linux/pci.h | 2
2 files changed, 342 insertions(+), 47 deletions(-)
Index: linux-2.6/drivers/pci/pci-driver.c
===================================================================
--- linux-2.6.orig/drivers/pci/pci-driver.c
+++ linux-2.6/drivers/pci/pci-driver.c
@@ -271,45 +271,57 @@ static int pci_device_remove(struct devi
return 0;
}
-static int pci_device_suspend(struct device * dev, pm_message_t state)
+static void pci_device_shutdown(struct device *dev)
{
- struct pci_dev * pci_dev = to_pci_dev(dev);
- struct pci_driver * drv = pci_dev->driver;
- int i = 0;
-
- if (drv && drv->suspend) {
- i = drv->suspend(pci_dev, state);
- suspend_report_result(drv->suspend, i);
- } else {
- pci_save_state(pci_dev);
- /*
- * mark its power state as "unknown", since we don't know if
- * e.g. the BIOS will change its device state when we suspend.
- */
- if (pci_dev->current_state == PCI_D0)
- pci_dev->current_state = PCI_UNKNOWN;
- }
- return i;
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct pci_driver *drv = pci_dev->driver;
+
+ if (drv && drv->shutdown)
+ drv->shutdown(pci_dev);
}
-static int pci_device_suspend_late(struct device * dev, pm_message_t state)
+#ifdef CONFIG_PM_SLEEP
+static int pci_pm_prepare(struct device *dev)
{
- struct pci_dev * pci_dev = to_pci_dev(dev);
- struct pci_driver * drv = pci_dev->driver;
- int i = 0;
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct pci_driver *drv = pci_dev->driver;
+ int error = 0;
- if (drv && drv->suspend_late) {
- i = drv->suspend_late(pci_dev, state);
- suspend_report_result(drv->suspend_late, i);
- }
- return i;
+ if (drv && drv->pm && drv->pm->prepare)
+ error = drv->pm->prepare(dev);
+
+ return error;
+}
+
+static void pci_pm_complete(struct device *dev)
+{
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct pci_driver *drv = pci_dev->driver;
+
+ if (drv && drv->pm && drv->pm->complete)
+ drv->pm->complete(dev);
}
/*
- * Default resume method for devices that have no driver provided resume,
+ * Default "suspend" method for devices that have no driver provided suspend,
* or not even a driver at all.
*/
-static int pci_default_resume(struct pci_dev *pci_dev)
+static void pci_default_pm_suspend(struct pci_dev *pci_dev)
+{
+ pci_save_state(pci_dev);
+ /*
+ * mark its power state as "unknown", since we don't know if
+ * e.g. the BIOS will change its device state when we suspend.
+ */
+ if (pci_dev->current_state == PCI_D0)
+ pci_dev->current_state = PCI_UNKNOWN;
+}
+
+/*
+ * Default "resume" method for devices that have no driver provided resume,
+ * or not even a driver at all.
+ */
+static int pci_default_pm_resume(struct pci_dev *pci_dev)
{
int retval = 0;
@@ -324,41 +336,294 @@ static int pci_default_resume(struct pci
return retval;
}
-static int pci_device_resume(struct device * dev)
+#ifdef CONFIG_SUSPEND
+static int pci_pm_suspend(struct device *dev)
+{
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct pci_driver *drv = pci_dev->driver;
+ int error = 0;
+
+ if (!drv) {
+ pci_default_pm_suspend(pci_dev);
+ return 0;
+ }
+
+ if (drv->pm) {
+ if (drv->pm->suspend) {
+ error = drv->pm->suspend(dev);
+ suspend_report_result(drv->pm->suspend, error);
+ } else {
+ pci_default_pm_suspend(pci_dev);
+ }
+ } else {
+ /* Legacy mechanism */
+ if (drv->suspend) {
+ error = drv->suspend(pci_dev, PMSG_SUSPEND);
+ suspend_report_result(drv->suspend, error);
+ } else {
+ pci_default_pm_suspend(pci_dev);
+ }
+ }
+
+ return error;
+}
+
+static int pci_pm_suspend_noirq(struct device *dev)
+{
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct pci_driver *drv = pci_dev->driver;
+ int error = 0;
+
+ if (!drv)
+ return 0;
+
+ if (drv->pm_noirq) {
+ if (drv->pm_noirq->suspend_noirq) {
+ error = drv->pm_noirq->suspend_noirq(dev);
+ suspend_report_result(drv->pm_noirq->suspend_noirq,
+ error);
+ }
+ } else if (drv->suspend_late) {
+ /* Legacy mechanism */
+ error = drv->suspend_late(pci_dev, PMSG_SUSPEND);
+ suspend_report_result(drv->suspend_late, error);
+ }
+
+ return error;
+}
+
+static int pci_pm_resume(struct device *dev)
{
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct pci_driver *drv = pci_dev->driver;
int error;
- struct pci_dev * pci_dev = to_pci_dev(dev);
- struct pci_driver * drv = pci_dev->driver;
- if (drv && drv->resume)
- error = drv->resume(pci_dev);
- else
- error = pci_default_resume(pci_dev);
+ if (!drv)
+ return pci_default_pm_resume(pci_dev);
+
+ if (drv->pm) {
+ error = drv->pm->resume ?
+ drv->pm->resume(dev) : pci_default_pm_resume(pci_dev);
+ } else {
+ /* Legacy mechanism */
+ error = drv->resume ?
+ drv->resume(pci_dev) : pci_default_pm_resume(pci_dev);
+ }
+
return error;
}
-static int pci_device_resume_early(struct device * dev)
+static int pci_pm_resume_noirq(struct device *dev)
{
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct pci_driver *drv = pci_dev->driver;
int error = 0;
- struct pci_dev * pci_dev = to_pci_dev(dev);
- struct pci_driver * drv = pci_dev->driver;
pci_fixup_device(pci_fixup_resume, pci_dev);
- if (drv && drv->resume_early)
+ if (!drv)
+ return 0;
+
+ if (drv->pm_noirq) {
+ if (drv->pm_noirq->resume_noirq)
+ error = drv->pm_noirq->resume_noirq(dev);
+ } else if (drv->resume_early) {
+ /* Legacy mechanism */
error = drv->resume_early(pci_dev);
+ }
+
return error;
}
+#endif /* CONFIG_SUSPEND */
-static void pci_device_shutdown(struct device *dev)
+#ifdef CONFIG_HIBERNATION
+static int pci_pm_freeze(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
struct pci_driver *drv = pci_dev->driver;
+ int error = 0;
- if (drv && drv->shutdown)
- drv->shutdown(pci_dev);
+ if (!drv) {
+ pci_default_pm_suspend(pci_dev);
+ return 0;
+ }
+
+ if (drv->pm) {
+ if (drv->pm->freeze) {
+ error = drv->pm->freeze(dev);
+ suspend_report_result(drv->pm->freeze, error);
+ } else {
+ pci_default_pm_suspend(pci_dev);
+ }
+ } else {
+ /* Legacy mechanism */
+ if (drv->suspend) {
+ error = drv->suspend(pci_dev, PMSG_FREEZE);
+ suspend_report_result(drv->suspend, error);
+ } else {
+ pci_default_pm_suspend(pci_dev);
+ }
+ }
+
+ return error;
+}
+
+static int pci_pm_freeze_noirq(struct device *dev)
+{
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct pci_driver *drv = pci_dev->driver;
+ int error = 0;
+
+ if (!drv)
+ return 0;
+
+ if (drv->pm_noirq) {
+ if (drv->pm_noirq->freeze_noirq) {
+ error = drv->pm_noirq->freeze_noirq(dev);
+ suspend_report_result(drv->pm_noirq->freeze_noirq,
+ error);
+ }
+ } else if (drv->suspend_late) {
+ /* Legacy mechanism */
+ error = drv->suspend_late(pci_dev, PMSG_FREEZE);
+ suspend_report_result(drv->suspend_late, error);
+ }
+
+ return error;
+}
+
+static int pci_pm_thaw(struct device *dev)
+{
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct pci_driver *drv = pci_dev->driver;
+ int error = 0;
+
+ if (!drv)
+ return 0;
+
+ if (drv->pm) {
+ if (drv->pm->thaw)
+ error = drv->pm->thaw(dev);
+ } else if (drv->resume) {
+ /* Legacy mechanism */
+ error = drv->resume(pci_dev);
+ }
+
+ return error;
+}
+
+static int pci_pm_thaw_noirq(struct device *dev)
+{
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct pci_driver *drv = pci_dev->driver;
+ int error = 0;
+
+ if (!drv)
+ return 0;
+
+ if (drv->pm_noirq) {
+ if (drv->pm_noirq->thaw_noirq)
+ error = drv->pm_noirq->thaw_noirq(dev);
+ } else if (drv->resume_early) {
+ /* Legacy mechanism */
+ error = drv->resume_early(pci_dev);
+ }
+
+ return error;
+}
+
+static int pci_pm_poweroff(struct device *dev)
+{
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct pci_driver *drv = pci_dev->driver;
+ int error = 0;
+
+ if (!drv)
+ return 0;
+
+ if (drv->pm) {
+ if (drv->pm->poweroff) {
+ error = drv->pm->poweroff(dev);
+ suspend_report_result(drv->pm->poweroff, error);
+ }
+ } else if (drv->suspend) {
+ /* Legacy mechanism */
+ error = drv->suspend(pci_dev, PMSG_HIBERNATE);
+ suspend_report_result(drv->suspend, error);
+ }
+
+ return error;
+}
+
+static int pci_pm_poweroff_noirq(struct device *dev)
+{
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct pci_driver *drv = pci_dev->driver;
+ int error = 0;
+
+ if (!drv)
+ return 0;
+
+ if (drv->pm_noirq) {
+ if (drv->pm_noirq->poweroff_noirq) {
+ error = drv->pm_noirq->poweroff_noirq(dev);
+ suspend_report_result(drv->pm_noirq->poweroff_noirq,
+ error);
+ }
+ } else if (drv->suspend_late) {
+ /* Legacy mechanism */
+ error = drv->suspend_late(pci_dev, PMSG_HIBERNATE);
+ suspend_report_result(drv->suspend_late, error);
+ }
+
+ return error;
}
+static int pci_pm_restore(struct device *dev)
+{
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct pci_driver *drv = pci_dev->driver;
+ int error;
+
+ if (!drv)
+ return pci_default_pm_resume(pci_dev);
+
+ if (drv->pm) {
+ error = drv->pm->restore ?
+ drv->pm->restore(dev) : pci_default_pm_resume(pci_dev);
+ } else {
+ /* Legacy mechanism */
+ error = drv->resume ?
+ drv->resume(pci_dev) : pci_default_pm_resume(pci_dev);
+ }
+
+ return error;
+}
+
+static int pci_pm_restore_noirq(struct device *dev)
+{
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct pci_driver *drv = pci_dev->driver;
+ int error = 0;
+
+ pci_fixup_device(pci_fixup_resume, pci_dev);
+
+ if (!drv)
+ return 0;
+
+ if (drv->pm_noirq) {
+ if (drv->pm_noirq->restore_noirq)
+ error = drv->pm_noirq->restore_noirq(dev);
+ } else if (drv->resume_early) {
+ /* Legacy mechanism */
+ error = drv->resume_early(pci_dev);
+ }
+
+ return error;
+}
+#endif /* CONFIG_HIBERNATION */
+#endif /* CONFIG_PM_SLEEP */
+
/**
* __pci_register_driver - register a new pci driver
* @drv: the driver structure to register
@@ -500,18 +765,46 @@ int pci_uevent(struct device *dev, struc
}
#endif
+struct pm_ops pci_pm_ops = {
+#ifdef CONFIG_PM_SLEEP
+ .prepare = pci_pm_prepare,
+ .complete = pci_pm_complete,
+#endif
+#ifdef CONFIG_SUSPEND
+ .suspend = pci_pm_suspend,
+ .resume = pci_pm_resume,
+#endif
+#ifdef CONFIG_HIBERNATION
+ .freeze = pci_pm_freeze,
+ .thaw = pci_pm_thaw,
+ .poweroff = pci_pm_poweroff,
+ .restore = pci_pm_restore,
+#endif
+};
+
+struct pm_noirq_ops pci_pm_noirq_ops = {
+#ifdef CONFIG_SUSPEND
+ .suspend_noirq = pci_pm_suspend_noirq,
+ .resume_noirq = pci_pm_resume_noirq,
+#endif
+#ifdef CONFIG_HIBERNATION
+ .freeze_noirq = pci_pm_freeze_noirq,
+ .thaw_noirq = pci_pm_thaw_noirq,
+ .poweroff_noirq = pci_pm_poweroff_noirq,
+ .restore_noirq = pci_pm_restore_noirq,
+#endif
+};
+
struct bus_type pci_bus_type = {
.name = "pci",
.match = pci_bus_match,
.uevent = pci_uevent,
.probe = pci_device_probe,
.remove = pci_device_remove,
- .suspend = pci_device_suspend,
- .suspend_late = pci_device_suspend_late,
- .resume_early = pci_device_resume_early,
- .resume = pci_device_resume,
.shutdown = pci_device_shutdown,
.dev_attrs = pci_dev_attrs,
+ .pm = &pci_pm_ops,
+ .pm_noirq = &pci_pm_noirq_ops,
};
static int __init pci_driver_init(void)
Index: linux-2.6/include/linux/pci.h
===================================================================
--- linux-2.6.orig/include/linux/pci.h
+++ linux-2.6/include/linux/pci.h
@@ -382,6 +382,8 @@ struct pci_driver {
int (*resume) (struct pci_dev *dev); /* Device woken up */
void (*shutdown) (struct pci_dev *dev);
+ struct pm_ops *pm;
+ struct pm_noirq_ops *pm_noirq;
struct pci_error_handlers *err_handler;
struct device_driver driver;
struct pci_dynids dynids;
--
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