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authorRafael J. Wysocki <rjw@sisk.pl>2008-05-20 00:49:04 +0200
committerJesse Barnes <jbarnes@virtuousgeek.org>2008-06-10 10:59:51 -0700
commitbbb44d9f23d868a2837c6b22b8dfb123d8e7800c (patch)
tree15573ad50a41601b0fda2f7d8568e6c94fee307b /drivers/pci
parent1eede070a59e1cc73da51e1aaa00d9ab86572cfc (diff)
PCI: implement new suspend/resume callbacks
Implement new suspend and hibernation callbacks for the PCI bus type. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/pci-driver.c392
1 files changed, 346 insertions, 46 deletions
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 677fd9d6db1..8eb8a3091dc 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -274,7 +274,57 @@ static int pci_device_remove(struct device * dev)
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;
+
+ if (drv && drv->shutdown)
+ drv->shutdown(pci_dev);
+ pci_msi_shutdown(pci_dev);
+ pci_msix_shutdown(pci_dev);
+}
+
+#ifdef CONFIG_PM_SLEEP
+
+/*
+ * Default "suspend" method for devices that have no driver provided suspend,
+ * or not even a driver at all.
+ */
+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;
+
+ /* restore the PCI config space */
+ pci_restore_state(pci_dev);
+ /* if the device was enabled before suspend, reenable */
+ retval = pci_reenable_device(pci_dev);
+ /*
+ * if the device was busmaster before the suspend, make it busmaster
+ * again
+ */
+ if (pci_dev->is_busmaster)
+ pci_set_master(pci_dev);
+
+ return retval;
+}
+
+static int pci_legacy_suspend(struct device *dev, pm_message_t state)
{
struct pci_dev * pci_dev = to_pci_dev(dev);
struct pci_driver * drv = pci_dev->driver;
@@ -284,21 +334,12 @@ static int pci_device_suspend(struct device * dev, pm_message_t state)
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;
+ pci_default_pm_suspend(pci_dev);
}
-
- pci_fixup_device(pci_fixup_suspend, pci_dev);
-
return i;
}
-static int pci_device_suspend_late(struct device * dev, pm_message_t state)
+static int pci_legacy_suspend_late(struct device *dev, pm_message_t state)
{
struct pci_dev * pci_dev = to_pci_dev(dev);
struct pci_driver * drv = pci_dev->driver;
@@ -311,26 +352,7 @@ static int pci_device_suspend_late(struct device * dev, pm_message_t state)
return i;
}
-/*
- * Default resume method for devices that have no driver provided resume,
- * or not even a driver at all.
- */
-static int pci_default_resume(struct pci_dev *pci_dev)
-{
- int retval = 0;
-
- /* restore the PCI config space */
- pci_restore_state(pci_dev);
- /* if the device was enabled before suspend, reenable */
- retval = pci_reenable_device(pci_dev);
- /* if the device was busmaster before the suspend, make it busmaster again */
- if (pci_dev->is_busmaster)
- pci_set_master(pci_dev);
-
- return retval;
-}
-
-static int pci_device_resume(struct device * dev)
+static int pci_legacy_resume(struct device *dev)
{
int error;
struct pci_dev * pci_dev = to_pci_dev(dev);
@@ -339,35 +361,313 @@ static int pci_device_resume(struct device * dev)
if (drv && drv->resume)
error = drv->resume(pci_dev);
else
- error = pci_default_resume(pci_dev);
- pci_fixup_device(pci_fixup_resume, pci_dev);
+ error = pci_default_pm_resume(pci_dev);
return error;
}
-static int pci_device_resume_early(struct device * dev)
+static int pci_legacy_resume_early(struct device *dev)
{
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_early, pci_dev);
-
if (drv && drv->resume_early)
error = drv->resume_early(pci_dev);
return error;
}
-static void pci_device_shutdown(struct device *dev)
+static int pci_pm_prepare(struct device *dev)
+{
+ struct device_driver *drv = dev->driver;
+ int error = 0;
+
+ if (drv && drv->pm && drv->pm->prepare)
+ error = drv->pm->prepare(dev);
+
+ return error;
+}
+
+static void pci_pm_complete(struct device *dev)
+{
+ struct device_driver *drv = dev->driver;
+
+ if (drv && drv->pm && drv->pm->complete)
+ drv->pm->complete(dev);
+}
+
+#ifdef CONFIG_SUSPEND
+
+static int pci_pm_suspend(struct device *dev)
+{
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct device_driver *drv = dev->driver;
+ int error = 0;
+
+ if (drv && 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 {
+ error = pci_legacy_suspend(dev, PMSG_SUSPEND);
+ }
+ pci_fixup_device(pci_fixup_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 && drv->shutdown)
- drv->shutdown(pci_dev);
- pci_msi_shutdown(pci_dev);
- pci_msix_shutdown(pci_dev);
+ if (drv && drv->pm) {
+ if (drv->pm->suspend_noirq) {
+ error = drv->pm->suspend_noirq(dev);
+ suspend_report_result(drv->pm->suspend_noirq, error);
+ }
+ } else {
+ error = pci_legacy_suspend_late(dev, PMSG_SUSPEND);
+ }
+
+ return error;
+}
+
+static int pci_pm_resume(struct device *dev)
+{
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct device_driver *drv = dev->driver;
+ int error;
+
+ pci_fixup_device(pci_fixup_resume, pci_dev);
+
+ if (drv && drv->pm) {
+ error = drv->pm->resume ? drv->pm->resume(dev) :
+ pci_default_pm_resume(pci_dev);
+ } else {
+ error = pci_legacy_resume(dev);
+ }
+
+ return error;
+}
+
+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;
+
+ pci_fixup_device(pci_fixup_resume_early, pci_dev);
+
+ if (drv && drv->pm) {
+ if (drv->pm->resume_noirq)
+ error = drv->pm->resume_noirq(dev);
+ } else {
+ error = pci_legacy_resume_early(dev);
+ }
+
+ return error;
+}
+
+#else /* !CONFIG_SUSPEND */
+
+#define pci_pm_suspend NULL
+#define pci_pm_suspend_noirq NULL
+#define pci_pm_resume NULL
+#define pci_pm_resume_noirq NULL
+
+#endif /* !CONFIG_SUSPEND */
+
+#ifdef CONFIG_HIBERNATION
+
+static int pci_pm_freeze(struct device *dev)
+{
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct device_driver *drv = dev->driver;
+ int error = 0;
+
+ if (drv && 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 {
+ error = pci_legacy_suspend(dev, PMSG_FREEZE);
+ pci_fixup_device(pci_fixup_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 && drv->pm) {
+ if (drv->pm->freeze_noirq) {
+ error = drv->pm->freeze_noirq(dev);
+ suspend_report_result(drv->pm->freeze_noirq, error);
+ }
+ } else {
+ error = pci_legacy_suspend_late(dev, PMSG_FREEZE);
+ }
+
+ return error;
+}
+
+static int pci_pm_thaw(struct device *dev)
+{
+ struct device_driver *drv = dev->driver;
+ int error = 0;
+
+ if (drv && drv->pm) {
+ if (drv->pm->thaw)
+ error = drv->pm->thaw(dev);
+ } else {
+ pci_fixup_device(pci_fixup_resume, to_pci_dev(dev));
+ error = pci_legacy_resume(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 && drv->pm) {
+ if (drv->pm->thaw_noirq)
+ error = drv->pm->thaw_noirq(dev);
+ } else {
+ pci_fixup_device(pci_fixup_resume_early, pci_dev);
+ error = pci_legacy_resume_early(dev);
+ }
+
+ return error;
+}
+
+static int pci_pm_poweroff(struct device *dev)
+{
+ struct device_driver *drv = dev->driver;
+ int error = 0;
+
+ pci_fixup_device(pci_fixup_suspend, to_pci_dev(dev));
+
+ if (drv && drv->pm) {
+ if (drv->pm->poweroff) {
+ error = drv->pm->poweroff(dev);
+ suspend_report_result(drv->pm->poweroff, error);
+ }
+ } else {
+ error = pci_legacy_suspend(dev, PMSG_HIBERNATE);
+ }
+
+ 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 && drv->pm) {
+ if (drv->pm->poweroff_noirq) {
+ error = drv->pm->poweroff_noirq(dev);
+ suspend_report_result(drv->pm->poweroff_noirq, error);
+ }
+ } else {
+ error = pci_legacy_suspend_late(dev, PMSG_HIBERNATE);
+ }
+
+ return error;
+}
+
+static int pci_pm_restore(struct device *dev)
+{
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct device_driver *drv = dev->driver;
+ int error;
+
+ if (drv && drv->pm) {
+ error = drv->pm->restore ? drv->pm->restore(dev) :
+ pci_default_pm_resume(pci_dev);
+ } else {
+ error = pci_legacy_resume(dev);
+ }
+ pci_fixup_device(pci_fixup_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 && drv->pm) {
+ if (drv->pm->restore_noirq)
+ error = drv->pm->restore_noirq(dev);
+ } else {
+ error = pci_legacy_resume_early(dev);
+ }
+ pci_fixup_device(pci_fixup_resume_early, pci_dev);
+
+ return error;
}
+#else /* !CONFIG_HIBERNATION */
+
+#define pci_pm_freeze NULL
+#define pci_pm_freeze_noirq NULL
+#define pci_pm_thaw NULL
+#define pci_pm_thaw_noirq NULL
+#define pci_pm_poweroff NULL
+#define pci_pm_poweroff_noirq NULL
+#define pci_pm_restore NULL
+#define pci_pm_restore_noirq NULL
+
+#endif /* !CONFIG_HIBERNATION */
+
+struct pm_ext_ops pci_pm_ops = {
+ .base = {
+ .prepare = pci_pm_prepare,
+ .complete = pci_pm_complete,
+ .suspend = pci_pm_suspend,
+ .resume = pci_pm_resume,
+ .freeze = pci_pm_freeze,
+ .thaw = pci_pm_thaw,
+ .poweroff = pci_pm_poweroff,
+ .restore = pci_pm_restore,
+ },
+ .suspend_noirq = pci_pm_suspend_noirq,
+ .resume_noirq = pci_pm_resume_noirq,
+ .freeze_noirq = pci_pm_freeze_noirq,
+ .thaw_noirq = pci_pm_thaw_noirq,
+ .poweroff_noirq = pci_pm_poweroff_noirq,
+ .restore_noirq = pci_pm_restore_noirq,
+};
+
+#define PCI_PM_OPS_PTR &pci_pm_ops
+
+#else /* !CONFIG_PM_SLEEP */
+
+#define PCI_PM_OPS_PTR NULL
+
+#endif /* !CONFIG_PM_SLEEP */
+
/**
* __pci_register_driver - register a new pci driver
* @drv: the driver structure to register
@@ -390,6 +690,9 @@ int __pci_register_driver(struct pci_driver *drv, struct module *owner,
drv->driver.owner = owner;
drv->driver.mod_name = mod_name;
+ if (drv->pm)
+ drv->driver.pm = &drv->pm->base;
+
spin_lock_init(&drv->dynids.lock);
INIT_LIST_HEAD(&drv->dynids.list);
@@ -515,12 +818,9 @@ struct bus_type pci_bus_type = {
.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_PTR,
};
static int __init pci_driver_init(void)