Benjamin Herrenschmidt 817820b022 powerpc/iommu: Support "hybrid" iommu/direct DMA ops for coherent_mask < dma_mask ...

This patch adds the ability to the DMA direct ops to fallback to the IOMMU
ops for coherent alloc/free if the coherent mask of the device isn't
suitable for accessing the direct DMA space and the device also happens
to have an active IOMMU table.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

2015-07-13 10:10:55 +10:00

3.3 KiB

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