]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commitdiff
AMD IOMMU: add device detach function for IOMMU API
authorJoerg Roedel <joerg.roedel@amd.com>
Mon, 8 Dec 2008 11:07:44 +0000 (12:07 +0100)
committerJoerg Roedel <joerg.roedel@amd.com>
Sat, 3 Jan 2009 13:11:55 +0000 (14:11 +0100)
Impact: add a generic function to detach devices from protection domains

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
arch/x86/kernel/amd_iommu.c

index 891d713d9c96ccc810c7d0801c05bfad9789d980..ef9b309e8e09def35320f6933f2bc100cf45c351 100644 (file)
@@ -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