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s390/pci: implement hibernation hooks

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

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott 2013-09-25 12:27:43 +02:00 committed by Martin Schwidefsky
parent e258d719ff
commit 69db3b5e85
1 changed files with 41 additions and 0 deletions
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41
arch/s390/pci/pci.c
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@ -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;