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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>
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1 changed files with 26 additions and 0 deletions
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@ -1657,4 +1657,30 @@ static void amd_iommu_domain_destroy(struct iommu_domain *dom)
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dom->priv = NULL;
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dom->priv = NULL;
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}
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}
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static void amd_iommu_detach_device(struct iommu_domain *dom,
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struct device *dev)
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{
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struct protection_domain *domain = dom->priv;
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struct amd_iommu *iommu;
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struct pci_dev *pdev;
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u16 devid;
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if (dev->bus != &pci_bus_type)
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return;
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pdev = to_pci_dev(dev);
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devid = calc_devid(pdev->bus->number, pdev->devfn);
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if (devid > 0)
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detach_device(domain, devid);
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iommu = amd_iommu_rlookup_table[devid];
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if (!iommu)
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return;
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iommu_queue_inv_dev_entry(iommu, devid);
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iommu_completion_wait(iommu);
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}
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#endif
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#endif
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