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| author | Alex Williamson <alex.williamson@redhat.com> | 2012-05-30 14:19:07 -0600 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2012-06-25 13:48:28 +0200 |
| commit | 9dcd61303af862c279df86aa97fde7ce371be774 (patch) | |
| tree | be61c0777c39c5d9cec564545de3cd1e21044936 /drivers/iommu | |
| parent | d72e31c9374627068df29da8085ca18c92ae35d3 (diff) | |
| download | talos-obmc-linux-9dcd61303af862c279df86aa97fde7ce371be774.tar.gz talos-obmc-linux-9dcd61303af862c279df86aa97fde7ce371be774.zip | |
amd_iommu: Support IOMMU groups
Add IOMMU group support to AMD-Vi device init and uninit code.
Existing notifiers make sure this gets called for each device.
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/amd_iommu.c | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 55283d6291c8..60ea92065d31 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -256,9 +256,11 @@ static bool check_device(struct device *dev) static int iommu_init_device(struct device *dev) { - struct pci_dev *pdev = to_pci_dev(dev); + struct pci_dev *dma_pdev, *pdev = to_pci_dev(dev); struct iommu_dev_data *dev_data; + struct iommu_group *group; u16 alias; + int ret; if (dev->archdata.iommu) return 0; @@ -279,8 +281,26 @@ static int iommu_init_device(struct device *dev) return -ENOTSUPP; } dev_data->alias_data = alias_data; + + dma_pdev = pci_get_bus_and_slot(alias >> 8, alias & 0xff); + } 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); + + if (ret) + return ret; + if (pci_iommuv2_capable(pdev)) { struct amd_iommu *iommu; @@ -309,6 +329,8 @@ static void iommu_ignore_device(struct device *dev) static void iommu_uninit_device(struct device *dev) { + iommu_group_remove_device(dev); + /* * Nothing to do here - we keep dev_data around for unplugged devices * and reuse it when the device is re-plugged - not doing so would |
