Commit 69db3b5e authored by Sebastian Ott's avatar Sebastian Ott Committed by Martin Schwidefsky
Browse files

s390/pci: implement hibernation hooks 



Implement architecture-specific functionality when a PCI device is
doing a hibernate transition.

Signed-off-by: default avatarSebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent e258d719

arch/s390/pci/pci.c

+41 −0
Original line number Diff line number Diff line
@@ -708,6 +708,47 @@ void pcibios_disable_device(struct pci_dev *pdev) 
	zdev->pdev = NULL;

}



#ifdef CONFIG_HIBERNATE_CALLBACKS

static int zpci_restore(struct device *dev)

{

	struct zpci_dev *zdev = get_zdev(to_pci_dev(dev));

	int ret = 0;



	if (zdev->state != ZPCI_FN_STATE_ONLINE)

		goto out;



	ret = clp_enable_fh(zdev, ZPCI_NR_DMA_SPACES);

	if (ret)

		goto out;



	zpci_map_resources(zdev);

	zpci_register_ioat(zdev, 0, zdev->start_dma + PAGE_OFFSET,

			   zdev->start_dma + zdev->iommu_size - 1,

			   (u64) zdev->dma_table);



out:

	return ret;

}



static int zpci_freeze(struct device *dev)

{

	struct zpci_dev *zdev = get_zdev(to_pci_dev(dev));



	if (zdev->state != ZPCI_FN_STATE_ONLINE)

		return 0;



	zpci_unregister_ioat(zdev, 0);

	return clp_disable_fh(zdev);

}



struct dev_pm_ops pcibios_pm_ops = {

	.thaw_noirq = zpci_restore,

	.freeze_noirq = zpci_freeze,

	.restore_noirq = zpci_restore,

	.poweroff_noirq = zpci_freeze,

};

#endif /* CONFIG_HIBERNATE_CALLBACKS */



static int zpci_scan_bus(struct zpci_dev *zdev)

{

	struct resource *res;