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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>
This commit is contained in:
Joerg Roedel 2008-12-08 12:07:44 +01:00
parent 98383fc301
commit 684f288884
1 changed files with 26 additions and 0 deletions
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26
arch/x86/kernel/amd_iommu.c
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@ -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