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| author |   Joerg Roedel <joerg.roedel@amd.com> | 2008-12-02 19:48:43 +0100 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2009-01-03 14:11:56 +0100 |
| commit | c6229ca649aa9b312d1f1de20af8d2603b14eead (patch) | |
| tree | 2df5caa2708e5566e8e9acb82fa22aac9fc3a2d3 /arch | |
| parent | AMD IOMMU: add device attach function for IOMMU API (diff) | |
| download | linux-dev-c6229ca649aa9b312d1f1de20af8d2603b14eead.tar.xz linux-dev-c6229ca649aa9b312d1f1de20af8d2603b14eead.zip | |
AMD IOMMU: add domain map function for IOMMU API
Impact: add a generic function to map pages into protection domains
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/amd_iommu.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c index 2f7c0b3a448b..1fcedbe39a99 100644 --- a/arch/x86/kernel/amd_iommu.c +++ b/arch/x86/kernel/amd_iommu.c @@ -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 |