[RFC/PATCH v3] powerpc/iommu: Support "hybrid" iommu/direct DMA ops for coherent_mask < dma_mask

Brian King brking at linux.vnet.ibm.com
Sat May 16 08:19:52 AEST 2015

On 05/14/2015 05:03 PM, Benjamin Herrenschmidt wrote:
> 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 at kernel.crashing.org>
> ---

Thanks. This one works fine for me with mpt2sas.

Tested-by: Brian King <brking at linux.vnet.ibm.com>


Brian King
Power Linux I/O
IBM Linux Technology Center

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