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authorJoerg Roedel <joerg.roedel@amd.com>2008-12-08 12:07:44 +0100
committerJoerg Roedel <joerg.roedel@amd.com>2009-01-03 14:11:55 +0100
commit684f2888847b896faafed87ce4733501d2cc283c (patch)
tree81ec9b19379b95536b61e98dca1ee4dc3c1596f6 /arch
parent98383fc301c6546af0f3a8a1d3cb8bf218f7e940 (diff)
downloadlinux-684f2888847b896faafed87ce4733501d2cc283c.tar.bz2
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 <joerg.roedel@amd.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/amd_iommu.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 891d713d9c96..ef9b309e8e09 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