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x86, AMD IOMMU: add dma_ops initialization function
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>
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1 changed files with 46 additions and 0 deletions
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@ -906,3 +906,49 @@ void prealloc_protection_domains(void)
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}
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}
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static struct dma_mapping_ops amd_iommu_dma_ops = {
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.alloc_coherent = alloc_coherent,
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.free_coherent = free_coherent,
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.map_single = map_single,
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.unmap_single = unmap_single,
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.map_sg = map_sg,
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.unmap_sg = unmap_sg,
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};
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int __init amd_iommu_init_dma_ops(void)
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{
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struct amd_iommu *iommu;
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int order = amd_iommu_aperture_order;
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int ret;
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list_for_each_entry(iommu, &amd_iommu_list, list) {
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iommu->default_dom = dma_ops_domain_alloc(iommu, order);
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if (iommu->default_dom == NULL)
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return -ENOMEM;
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ret = iommu_init_unity_mappings(iommu);
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if (ret)
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goto free_domains;
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}
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if (amd_iommu_isolate)
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prealloc_protection_domains();
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iommu_detected = 1;
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force_iommu = 1;
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bad_dma_address = 0;
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gart_iommu_aperture_disabled = 1;
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gart_iommu_aperture = 0;
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dma_ops = &amd_iommu_dma_ops;
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return 0;
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free_domains:
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list_for_each_entry(iommu, &amd_iommu_list, list) {
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if (iommu->default_dom)
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dma_ops_domain_free(iommu->default_dom);
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}
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return ret;
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}
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