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intel-iommu: Create new iommu_domain_identity_map() function

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We'll want to do this to a _domain_ (the si_domain) rather than a PCI device.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
David Woodhouse 2009-06-26 18:50:28 +01:00
parent bf92df30df
commit b213203e47
1 changed files with 36 additions and 26 deletions
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62
drivers/pci/intel-iommu.c
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@ -1849,25 +1849,12 @@ error:
static int iommu_identity_mapping;
static int iommu_prepare_identity_map(struct pci_dev *pdev,
unsigned long long start,
unsigned long long end)
static int iommu_domain_identity_map(struct dmar_domain *domain,
unsigned long long start,
unsigned long long end)
{
struct dmar_domain *domain;
unsigned long size;
unsigned long long base;
int ret;
printk(KERN_INFO
"IOMMU: Setting identity map for device %s [0x%Lx - 0x%Lx]\n",
pci_name(pdev), start, end);
if (iommu_identity_mapping)
domain = si_domain;
else
/* page table init */
domain = get_domain_for_dev(pdev, DEFAULT_DOMAIN_ADDRESS_WIDTH);
if (!domain)
return -ENOMEM;
/* The address might not be aligned */
base = start & PAGE_MASK;
@ -1876,31 +1863,54 @@ static int iommu_prepare_identity_map(struct pci_dev *pdev,
if (!reserve_iova(&domain->iovad, IOVA_PFN(base),
IOVA_PFN(base + size) - 1)) {
printk(KERN_ERR "IOMMU: reserve iova failed\n");
ret = -ENOMEM;
goto error;
return -ENOMEM;
}
pr_debug("Mapping reserved region %lx@%llx for %s\n",
size, base, pci_name(pdev));
pr_debug("Mapping reserved region %lx@%llx for domain %d\n",
size, base, domain->id);
/*
* RMRR range might have overlap with physical memory range,
* clear it first
*/
dma_pte_clear_range(domain, base, base + size);
ret = domain_page_mapping(domain, base, base, size,
DMA_PTE_READ|DMA_PTE_WRITE);
return domain_page_mapping(domain, base, base, size,
DMA_PTE_READ|DMA_PTE_WRITE);
}
static int iommu_prepare_identity_map(struct pci_dev *pdev,
unsigned long long start,
unsigned long long end)
{
struct dmar_domain *domain;
int ret;
printk(KERN_INFO
"IOMMU: Setting identity map for device %s [0x%Lx - 0x%Lx]\n",
pci_name(pdev), start, end);
if (iommu_identity_mapping)
domain = si_domain;
else
/* page table init */
domain = get_domain_for_dev(pdev, DEFAULT_DOMAIN_ADDRESS_WIDTH);
if (!domain)
return -ENOMEM;
ret = iommu_domain_identity_map(domain, start, end);
if (ret)
goto error;
/* context entry init */
ret = domain_context_mapping(domain, pdev, CONTEXT_TT_MULTI_LEVEL);
if (!ret)
return 0;
error:
if (ret)
goto error;
return 0;
error:
domain_exit(domain);
return ret;
}
static inline int iommu_prepare_rmrr_dev(struct dmar_rmrr_unit *rmrr,