x86, AMD IOMMU: add mapping functions for coherent mappings
This patch adds the dma_ops functions for coherent mappings. Signed-off-by: NJoerg 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: NIngo Molnar <mingo@elte.hu>
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