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iommu/amd: Split IOMMU Group topology walk 

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 2012-10-08 22:49:41 -06:00 committed by Joerg Roedel
parent eb9c95271e
commit 2851db21b8
1 changed files with 33 additions and 25 deletions
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58
drivers/iommu/amd_iommu.c
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@ -276,32 +276,9 @@ static void swap_pci_ref(struct pci_dev **from, struct pci_dev *to)
#define REQ_ACS_FLAGS (PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF)
static int init_iommu_group(struct device *dev)
static struct pci_dev *get_isolation_root(struct pci_dev *pdev)
{
struct iommu_dev_data *dev_data;
struct iommu_group *group;
struct pci_dev *dma_pdev = NULL;
int ret;
group = iommu_group_get(dev);
if (group) {
iommu_group_put(group);
return 0;
}
dev_data = find_dev_data(get_device_id(dev));
if (!dev_data)
return -ENOMEM;
if (dev_data->alias_data) {
u16 alias;
alias = amd_iommu_alias_table[dev_data->devid];
dma_pdev = pci_get_bus_and_slot(alias >> 8, alias & 0xff);
}
if (!dma_pdev)
dma_pdev = pci_dev_get(to_pci_dev(dev));
struct pci_dev *dma_pdev = pdev;
/* Account for quirked devices */
swap_pci_ref(&dma_pdev, pci_get_dma_source(dma_pdev));
@ -339,6 +316,37 @@ static int init_iommu_group(struct device *dev)
}
root_bus:
return dma_pdev;
}
static int init_iommu_group(struct device *dev)
{
struct iommu_dev_data *dev_data;
struct iommu_group *group;
struct pci_dev *dma_pdev = NULL;
int ret;
group = iommu_group_get(dev);
if (group) {
iommu_group_put(group);
return 0;
}
dev_data = find_dev_data(get_device_id(dev));
if (!dev_data)
return -ENOMEM;
if (dev_data->alias_data) {
u16 alias;
alias = amd_iommu_alias_table[dev_data->devid];
dma_pdev = pci_get_bus_and_slot(alias >> 8, alias & 0xff);
}
if (!dma_pdev)
dma_pdev = pci_dev_get(to_pci_dev(dev));
dma_pdev = get_isolation_root(dma_pdev);
group = iommu_group_get(&dma_pdev->dev);
pci_dev_put(dma_pdev);
if (!group) {