Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 01106066 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

AMD IOMMU: add device attach function for IOMMU API 



Impact: add a generic function to attach devices to protection domains

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 684f2888

arch/x86/kernel/amd_iommu.c

+35 −0
Original line number Diff line number Diff line
@@ -1683,4 +1683,39 @@ static void amd_iommu_detach_device(struct iommu_domain *dom, 
	iommu_completion_wait(iommu);

}



static int amd_iommu_attach_device(struct iommu_domain *dom,

				   struct device *dev)

{

	struct protection_domain *domain = dom->priv;

	struct protection_domain *old_domain;

	struct amd_iommu *iommu;

	struct pci_dev *pdev;

	u16 devid;



	if (dev->bus != &pci_bus_type)

		return -EINVAL;



	pdev = to_pci_dev(dev);



	devid = calc_devid(pdev->bus->number, pdev->devfn);



	if (devid >= amd_iommu_last_bdf ||

			devid != amd_iommu_alias_table[devid])

		return -EINVAL;



	iommu = amd_iommu_rlookup_table[devid];

	if (!iommu)

		return -EINVAL;



	old_domain = domain_for_device(devid);

	if (old_domain)

		return -EBUSY;



	attach_device(iommu, domain, devid);



	iommu_completion_wait(iommu);



	return 0;

}



#endif