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| author | Alex Williamson <alex.williamson@redhat.com> | 2012-05-30 14:19:19 -0600 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2012-06-25 13:48:28 +0200 |
| commit | abdfdde2534c48d7a761fc437ad3d840a5947dbc (patch) | |
| tree | 6096f56dea5007d20d3be0590e849d9ed4464467 /drivers/iommu | |
| parent | 9dcd61303af862c279df86aa97fde7ce371be774 (diff) | |
| download | lwn-abdfdde2534c48d7a761fc437ad3d840a5947dbc.tar.gz lwn-abdfdde2534c48d7a761fc437ad3d840a5947dbc.zip | |
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>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/intel-iommu.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index c62f2df25221..4a434528cd1c 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -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, }; |