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x86, AMD IOMMU: add dma_ops initialization function

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This patch adds the function to initialize the dma_ops for the AMD IOMMU.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Joerg Roedel 2008-06-26 21:28:05 +02:00 committed by Ingo Molnar
parent c432f3df8e
commit 6631ee9d00
1 changed files with 46 additions and 0 deletions
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46
arch/x86/kernel/amd_iommu.c
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@ -906,3 +906,49 @@ void prealloc_protection_domains(void)
} }
} }
static struct dma_mapping_ops amd_iommu_dma_ops = {
.alloc_coherent = alloc_coherent,
.free_coherent = free_coherent,
.map_single = map_single,
.unmap_single = unmap_single,
.map_sg = map_sg,
.unmap_sg = unmap_sg,
};
int __init amd_iommu_init_dma_ops(void)
{
struct amd_iommu *iommu;
int order = amd_iommu_aperture_order;
int ret;
list_for_each_entry(iommu, &amd_iommu_list, list) {
iommu->default_dom = dma_ops_domain_alloc(iommu, order);
if (iommu->default_dom == NULL)
return -ENOMEM;
ret = iommu_init_unity_mappings(iommu);
if (ret)
goto free_domains;
}
if (amd_iommu_isolate)
prealloc_protection_domains();
iommu_detected = 1;
force_iommu = 1;
bad_dma_address = 0;
gart_iommu_aperture_disabled = 1;
gart_iommu_aperture = 0;
dma_ops = &amd_iommu_dma_ops;
return 0;
free_domains:
list_for_each_entry(iommu, &amd_iommu_list, list) {
if (iommu->default_dom)
dma_ops_domain_free(iommu->default_dom);
}
return ret;
}