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Commit 684f2888 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

AMD IOMMU: add device detach function for IOMMU API 



Impact: add a generic function to detach devices from protection domains

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 98383fc3

arch/x86/kernel/amd_iommu.c

+26 −0
Original line number Diff line number Diff line
@@ -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