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AMD IOMMU: add domain map function for IOMMU API

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Impact: add a generic function to map pages into protection domains

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2008-12-02 19:48:43 +01:00
parent 01106066a6
commit c6229ca649
1 changed files with 29 additions and 0 deletions
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29
arch/x86/kernel/amd_iommu.c
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@ -1718,4 +1718,33 @@ static int amd_iommu_attach_device(struct iommu_domain *dom,
return 0;
}
static int amd_iommu_map_range(struct iommu_domain *dom,
unsigned long iova, phys_addr_t paddr,
size_t size, int iommu_prot)
{
struct protection_domain *domain = dom->priv;
unsigned long i, npages = iommu_num_pages(paddr, size, PAGE_SIZE);
int prot = 0;
int ret;
if (iommu_prot & IOMMU_READ)
prot |= IOMMU_PROT_IR;
if (iommu_prot & IOMMU_WRITE)
prot |= IOMMU_PROT_IW;
iova &= PAGE_MASK;
paddr &= PAGE_MASK;
for (i = 0; i < npages; ++i) {
ret = iommu_map_page(domain, iova, paddr, prot);
if (ret)
return ret;
iova += PAGE_SIZE;
paddr += PAGE_SIZE;
}
return 0;
}
#endif