From: Joerg Roedel Date: Mon, 8 Dec 2008 11:07:44 +0000 (+0100) Subject: AMD IOMMU: add device detach function for IOMMU API X-Git-Tag: v2.6.29-rc1~522^2~1^2~28 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=684f2888847b896faafed87ce4733501d2cc283c;p=profile%2Fivi%2Fkernel-x86-ivi.git AMD IOMMU: add device detach function for IOMMU API Impact: add a generic function to detach devices from protection domains Signed-off-by: Joerg Roedel --- diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c index 891d713..ef9b309 100644 --- a/arch/x86/kernel/amd_iommu.c +++ b/arch/x86/kernel/amd_iommu.c @@ -1657,4 +1657,30 @@ static void amd_iommu_domain_destroy(struct iommu_domain *dom) dom->priv = NULL; } +static void amd_iommu_detach_device(struct iommu_domain *dom, + struct device *dev) +{ + struct protection_domain *domain = dom->priv; + struct amd_iommu *iommu; + struct pci_dev *pdev; + u16 devid; + + if (dev->bus != &pci_bus_type) + return; + + pdev = to_pci_dev(dev); + + devid = calc_devid(pdev->bus->number, pdev->devfn); + + if (devid > 0) + detach_device(domain, devid); + + iommu = amd_iommu_rlookup_table[devid]; + if (!iommu) + return; + + iommu_queue_inv_dev_entry(iommu, devid); + iommu_completion_wait(iommu); +} + #endif