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intel-iommu: Support IOMMU groups 

Add IOMMU group support to Intel VT-d code.  This driver sets up
devices ondemand, so make use of the add_device/remove_device
callbacks in IOMMU API to manage setting up the groups.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Alex Williamson 2012-05-30 14:19:19 -06:00 committed by Joerg Roedel
parent 9dcd61303a
commit abdfdde253
1 changed files with 43 additions and 0 deletions
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43
drivers/iommu/intel-iommu.c
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@ -4090,6 +4090,47 @@ static int intel_iommu_domain_has_cap(struct iommu_domain *domain,
return 0;
}
static int intel_iommu_add_device(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct pci_dev *bridge, *dma_pdev;
struct iommu_group *group;
int ret;
if (!device_to_iommu(pci_domain_nr(pdev->bus),
pdev->bus->number, pdev->devfn))
return -ENODEV;
bridge = pci_find_upstream_pcie_bridge(pdev);
if (bridge) {
if (pci_is_pcie(bridge))
dma_pdev = pci_get_domain_bus_and_slot(
pci_domain_nr(pdev->bus),
bridge->subordinate->number, 0);
else
dma_pdev = pci_dev_get(bridge);
} else
dma_pdev = pci_dev_get(pdev);
group = iommu_group_get(&dma_pdev->dev);
pci_dev_put(dma_pdev);
if (!group) {
group = iommu_group_alloc();
if (IS_ERR(group))
return PTR_ERR(group);
}
ret = iommu_group_add_device(group, dev);
iommu_group_put(group);
return ret;
}
static void intel_iommu_remove_device(struct device *dev)
{
iommu_group_remove_device(dev);
}
static struct iommu_ops intel_iommu_ops = {
.domain_init = intel_iommu_domain_init,
.domain_destroy = intel_iommu_domain_destroy,
@ -4099,6 +4140,8 @@ static struct iommu_ops intel_iommu_ops = {
.unmap = intel_iommu_unmap,
.iova_to_phys = intel_iommu_iova_to_phys,
.domain_has_cap = intel_iommu_domain_has_cap,
.add_device = intel_iommu_add_device,
.remove_device = intel_iommu_remove_device,
.pgsize_bitmap = INTEL_IOMMU_PGSIZES,
};