AMD IOMMU: add device attach function for IOMMU API

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

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2008-12-02 19:34:11 +01:00
parent 684f288884
commit 01106066a6

View File

@ -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