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Commit 6631ee9d authored by Joerg Roedel's avatar Joerg Roedel Committed by Ingo Molnar
Browse files

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: default avatarJoerg 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: default avatarIngo Molnar <mingo@elte.hu>
parent c432f3df

arch/x86/kernel/amd_iommu.c

+46 −0
Original line number Diff line number Diff line
@@ -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;

}