mirror of
https://github.com/edk2-porting/linux-next.git
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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>
This commit is contained in:
Rafael J. Wysocki
Jesse Barnes
parent
1eede070a5
commit
bbb44d9f23
@ -274,7 +274,57 @@ static int pci_device_remove(struct device * dev)
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return 0;
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}
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static int pci_device_suspend(struct device * dev, pm_message_t state)
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static void pci_device_shutdown(struct device *dev)
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{
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struct pci_dev *pci_dev = to_pci_dev(dev);
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struct pci_driver *drv = pci_dev->driver;
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if (drv && drv->shutdown)
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drv->shutdown(pci_dev);
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pci_msi_shutdown(pci_dev);
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pci_msix_shutdown(pci_dev);
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}
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#ifdef CONFIG_PM_SLEEP
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/*
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* Default "suspend" method for devices that have no driver provided suspend,
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* or not even a driver at all.
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*/
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static void pci_default_pm_suspend(struct pci_dev *pci_dev)
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{
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pci_save_state(pci_dev);
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/*
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* mark its power state as "unknown", since we don't know if
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* e.g. the BIOS will change its device state when we suspend.
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*/
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if (pci_dev->current_state == PCI_D0)
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pci_dev->current_state = PCI_UNKNOWN;
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}
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/*
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* Default "resume" method for devices that have no driver provided resume,
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* or not even a driver at all.
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*/
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static int pci_default_pm_resume(struct pci_dev *pci_dev)
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{
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int retval = 0;
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/* restore the PCI config space */
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pci_restore_state(pci_dev);
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/* if the device was enabled before suspend, reenable */
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retval = pci_reenable_device(pci_dev);
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/*
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* if the device was busmaster before the suspend, make it busmaster
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* again
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*/
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if (pci_dev->is_busmaster)
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pci_set_master(pci_dev);
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return retval;
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}
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static int pci_legacy_suspend(struct device *dev, pm_message_t state)
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{
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struct pci_dev * pci_dev = to_pci_dev(dev);
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struct pci_driver * drv = pci_dev->driver;
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@ -284,21 +334,12 @@ static int pci_device_suspend(struct device * dev, pm_message_t state)
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i = drv->suspend(pci_dev, state);
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suspend_report_result(drv->suspend, i);
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} else {
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pci_save_state(pci_dev);
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/*
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* mark its power state as "unknown", since we don't know if
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* e.g. the BIOS will change its device state when we suspend.
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*/
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if (pci_dev->current_state == PCI_D0)
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pci_dev->current_state = PCI_UNKNOWN;
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pci_default_pm_suspend(pci_dev);
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}
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pci_fixup_device(pci_fixup_suspend, pci_dev);
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return i;
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}
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static int pci_device_suspend_late(struct device * dev, pm_message_t state)
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static int pci_legacy_suspend_late(struct device *dev, pm_message_t state)
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{
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struct pci_dev * pci_dev = to_pci_dev(dev);
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struct pci_driver * drv = pci_dev->driver;
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@ -311,26 +352,7 @@ static int pci_device_suspend_late(struct device * dev, pm_message_t state)
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return i;
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}
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/*
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* Default resume method for devices that have no driver provided resume,
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* or not even a driver at all.
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*/
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static int pci_default_resume(struct pci_dev *pci_dev)
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{
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int retval = 0;
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/* restore the PCI config space */
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pci_restore_state(pci_dev);
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/* if the device was enabled before suspend, reenable */
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retval = pci_reenable_device(pci_dev);
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/* if the device was busmaster before the suspend, make it busmaster again */
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if (pci_dev->is_busmaster)
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pci_set_master(pci_dev);
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return retval;
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}
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static int pci_device_resume(struct device * dev)
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static int pci_legacy_resume(struct device *dev)
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{
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int error;
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struct pci_dev * pci_dev = to_pci_dev(dev);
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@ -339,35 +361,313 @@ static int pci_device_resume(struct device * dev)
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if (drv && drv->resume)
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error = drv->resume(pci_dev);
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else
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error = pci_default_resume(pci_dev);
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pci_fixup_device(pci_fixup_resume, pci_dev);
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error = pci_default_pm_resume(pci_dev);
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return error;
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}
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static int pci_device_resume_early(struct device * dev)
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static int pci_legacy_resume_early(struct device *dev)
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{
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int error = 0;
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struct pci_dev * pci_dev = to_pci_dev(dev);
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struct pci_driver * drv = pci_dev->driver;
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pci_fixup_device(pci_fixup_resume_early, pci_dev);
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if (drv && drv->resume_early)
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error = drv->resume_early(pci_dev);
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return error;
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}
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static void pci_device_shutdown(struct device *dev)
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static int pci_pm_prepare(struct device *dev)
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{
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struct device_driver *drv = dev->driver;
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int error = 0;
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if (drv && drv->pm && drv->pm->prepare)
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error = drv->pm->prepare(dev);
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return error;
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}
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static void pci_pm_complete(struct device *dev)
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{
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struct device_driver *drv = dev->driver;
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if (drv && drv->pm && drv->pm->complete)
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drv->pm->complete(dev);
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}
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#ifdef CONFIG_SUSPEND
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static int pci_pm_suspend(struct device *dev)
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{
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struct pci_dev *pci_dev = to_pci_dev(dev);
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struct device_driver *drv = dev->driver;
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int error = 0;
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if (drv && drv->pm) {
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if (drv->pm->suspend) {
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error = drv->pm->suspend(dev);
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suspend_report_result(drv->pm->suspend, error);
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} else {
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pci_default_pm_suspend(pci_dev);
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}
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} else {
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error = pci_legacy_suspend(dev, PMSG_SUSPEND);
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}
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pci_fixup_device(pci_fixup_suspend, pci_dev);
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return error;
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}
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static int pci_pm_suspend_noirq(struct device *dev)
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{
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struct pci_dev *pci_dev = to_pci_dev(dev);
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struct pci_driver *drv = pci_dev->driver;
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int error = 0;
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if (drv && drv->shutdown)
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drv->shutdown(pci_dev);
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pci_msi_shutdown(pci_dev);
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pci_msix_shutdown(pci_dev);
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if (drv && drv->pm) {
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if (drv->pm->suspend_noirq) {
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error = drv->pm->suspend_noirq(dev);
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suspend_report_result(drv->pm->suspend_noirq, error);
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}
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} else {
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error = pci_legacy_suspend_late(dev, PMSG_SUSPEND);
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}
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return error;
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}
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static int pci_pm_resume(struct device *dev)
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{
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struct pci_dev *pci_dev = to_pci_dev(dev);
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struct device_driver *drv = dev->driver;
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int error;
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pci_fixup_device(pci_fixup_resume, pci_dev);
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if (drv && drv->pm) {
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error = drv->pm->resume ? drv->pm->resume(dev) :
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pci_default_pm_resume(pci_dev);
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} else {
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error = pci_legacy_resume(dev);
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}
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return error;
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}
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static int pci_pm_resume_noirq(struct device *dev)
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{
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struct pci_dev *pci_dev = to_pci_dev(dev);
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struct pci_driver *drv = pci_dev->driver;
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int error = 0;
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pci_fixup_device(pci_fixup_resume_early, pci_dev);
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if (drv && drv->pm) {
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if (drv->pm->resume_noirq)
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error = drv->pm->resume_noirq(dev);
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} else {
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error = pci_legacy_resume_early(dev);
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}
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return error;
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}
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#else /* !CONFIG_SUSPEND */
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#define pci_pm_suspend NULL
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#define pci_pm_suspend_noirq NULL
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#define pci_pm_resume NULL
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#define pci_pm_resume_noirq NULL
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#endif /* !CONFIG_SUSPEND */
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#ifdef CONFIG_HIBERNATION
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static int pci_pm_freeze(struct device *dev)
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{
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struct pci_dev *pci_dev = to_pci_dev(dev);
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struct device_driver *drv = dev->driver;
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int error = 0;
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if (drv && drv->pm) {
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if (drv->pm->freeze) {
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error = drv->pm->freeze(dev);
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suspend_report_result(drv->pm->freeze, error);
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} else {
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pci_default_pm_suspend(pci_dev);
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}
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} else {
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error = pci_legacy_suspend(dev, PMSG_FREEZE);
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pci_fixup_device(pci_fixup_suspend, pci_dev);
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}
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return error;
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}
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static int pci_pm_freeze_noirq(struct device *dev)
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{
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struct pci_dev *pci_dev = to_pci_dev(dev);
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struct pci_driver *drv = pci_dev->driver;
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int error = 0;
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if (drv && drv->pm) {
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if (drv->pm->freeze_noirq) {
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error = drv->pm->freeze_noirq(dev);
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suspend_report_result(drv->pm->freeze_noirq, error);
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}
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} else {
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error = pci_legacy_suspend_late(dev, PMSG_FREEZE);
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}
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return error;
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}
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static int pci_pm_thaw(struct device *dev)
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{
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struct device_driver *drv = dev->driver;
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int error = 0;
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if (drv && drv->pm) {
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if (drv->pm->thaw)
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error = drv->pm->thaw(dev);
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} else {
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pci_fixup_device(pci_fixup_resume, to_pci_dev(dev));
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error = pci_legacy_resume(dev);
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}
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return error;
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}
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static int pci_pm_thaw_noirq(struct device *dev)
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{
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struct pci_dev *pci_dev = to_pci_dev(dev);
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struct pci_driver *drv = pci_dev->driver;
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int error = 0;
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if (drv && drv->pm) {
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if (drv->pm->thaw_noirq)
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error = drv->pm->thaw_noirq(dev);
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} else {
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pci_fixup_device(pci_fixup_resume_early, pci_dev);
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error = pci_legacy_resume_early(dev);
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}
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return error;
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}
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static int pci_pm_poweroff(struct device *dev)
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{
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struct device_driver *drv = dev->driver;
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int error = 0;
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pci_fixup_device(pci_fixup_suspend, to_pci_dev(dev));
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if (drv && drv->pm) {
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if (drv->pm->poweroff) {
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error = drv->pm->poweroff(dev);
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suspend_report_result(drv->pm->poweroff, error);
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}
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} else {
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error = pci_legacy_suspend(dev, PMSG_HIBERNATE);
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}
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return error;
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}
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static int pci_pm_poweroff_noirq(struct device *dev)
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{
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struct pci_dev *pci_dev = to_pci_dev(dev);
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struct pci_driver *drv = pci_dev->driver;
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int error = 0;
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if (drv && drv->pm) {
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if (drv->pm->poweroff_noirq) {
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error = drv->pm->poweroff_noirq(dev);
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suspend_report_result(drv->pm->poweroff_noirq, error);
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}
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} else {
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error = pci_legacy_suspend_late(dev, PMSG_HIBERNATE);
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}
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return error;
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}
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static int pci_pm_restore(struct device *dev)
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{
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struct pci_dev *pci_dev = to_pci_dev(dev);
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struct device_driver *drv = dev->driver;
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int error;
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if (drv && drv->pm) {
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error = drv->pm->restore ? drv->pm->restore(dev) :
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pci_default_pm_resume(pci_dev);
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} else {
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error = pci_legacy_resume(dev);
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}
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pci_fixup_device(pci_fixup_resume, pci_dev);
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return error;
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}
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static int pci_pm_restore_noirq(struct device *dev)
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{
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struct pci_dev *pci_dev = to_pci_dev(dev);
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struct pci_driver *drv = pci_dev->driver;
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int error = 0;
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pci_fixup_device(pci_fixup_resume, pci_dev);
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if (drv && drv->pm) {
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if (drv->pm->restore_noirq)
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error = drv->pm->restore_noirq(dev);
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} else {
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error = pci_legacy_resume_early(dev);
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}
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pci_fixup_device(pci_fixup_resume_early, pci_dev);
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return error;
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}
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#else /* !CONFIG_HIBERNATION */
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#define pci_pm_freeze NULL
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#define pci_pm_freeze_noirq NULL
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#define pci_pm_thaw NULL
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#define pci_pm_thaw_noirq NULL
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#define pci_pm_poweroff NULL
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#define pci_pm_poweroff_noirq NULL
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#define pci_pm_restore NULL
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#define pci_pm_restore_noirq NULL
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#endif /* !CONFIG_HIBERNATION */
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struct pm_ext_ops pci_pm_ops = {
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.base = {
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.prepare = pci_pm_prepare,
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.complete = pci_pm_complete,
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.suspend = pci_pm_suspend,
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.resume = pci_pm_resume,
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.freeze = pci_pm_freeze,
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.thaw = pci_pm_thaw,
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.poweroff = pci_pm_poweroff,
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.restore = pci_pm_restore,
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},
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.suspend_noirq = pci_pm_suspend_noirq,
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.resume_noirq = pci_pm_resume_noirq,
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.freeze_noirq = pci_pm_freeze_noirq,
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.thaw_noirq = pci_pm_thaw_noirq,
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.poweroff_noirq = pci_pm_poweroff_noirq,
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.restore_noirq = pci_pm_restore_noirq,
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};
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#define PCI_PM_OPS_PTR &pci_pm_ops
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#else /* !CONFIG_PM_SLEEP */
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#define PCI_PM_OPS_PTR NULL
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#endif /* !CONFIG_PM_SLEEP */
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/**
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* __pci_register_driver - register a new pci driver
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* @drv: the driver structure to register
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@ -390,6 +690,9 @@ int __pci_register_driver(struct pci_driver *drv, struct module *owner,
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drv->driver.owner = owner;
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drv->driver.mod_name = mod_name;
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if (drv->pm)
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drv->driver.pm = &drv->pm->base;
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spin_lock_init(&drv->dynids.lock);
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INIT_LIST_HEAD(&drv->dynids.list);
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@ -515,12 +818,9 @@ struct bus_type pci_bus_type = {
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.uevent = pci_uevent,
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.probe = pci_device_probe,
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.remove = pci_device_remove,
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.suspend = pci_device_suspend,
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.suspend_late = pci_device_suspend_late,
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.resume_early = pci_device_resume_early,
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.resume = pci_device_resume,
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.shutdown = pci_device_shutdown,
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.dev_attrs = pci_dev_attrs,
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.pm = PCI_PM_OPS_PTR,
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};
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static int __init pci_driver_init(void)
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@ -389,7 +389,7 @@ struct pci_driver {
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int (*resume_early) (struct pci_dev *dev);
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int (*resume) (struct pci_dev *dev); /* Device woken up */
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void (*shutdown) (struct pci_dev *dev);
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struct pm_ext_ops *pm;
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struct pci_error_handlers *err_handler;
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struct device_driver driver;
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struct pci_dynids dynids;
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