From 69db3b5e850d0cac543d8523cbde17a4729f8990 Mon Sep 17 00:00:00 2001 From: Sebastian Ott Date: Wed, 25 Sep 2013 12:27:43 +0200 Subject: [PATCH] s390/pci: implement hibernation hooks Implement architecture-specific functionality when a PCI device is doing a hibernate transition. Signed-off-by: Sebastian Ott Signed-off-by: Martin Schwidefsky --- arch/s390/pci/pci.c | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c index f17a8343e360..206186c44ade 100644 --- a/arch/s390/pci/pci.c +++ b/arch/s390/pci/pci.c @@ -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; -- 2.20.1