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* dma-direct: reject too small dma masksChristoph Hellwig2018-01-151-0/+1
| | | | | Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Robin Murphy <robin.murphy@arm.com>
* dma-direct: make dma_direct_{alloc,free} available to other implementationsChristoph Hellwig2018-01-151-0/+5
| | | | | | | So that they don't need to indirect through the operation vector. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Vladimir Murzin <vladimir.murzin@arm.com>
* dma-mapping: move dma_mark_clean to dma-direct.hChristoph Hellwig2018-01-101-0/+9
| | | | | | | | And unlike the other helpers we don't require a <asm/dma-direct.h> as this helper is a special case for ia64 only, and this keeps it as simple as possible. Signed-off-by: Christoph Hellwig <hch@lst.de>
* dma-mapping: move swiotlb arch helpers to a new headerChristoph Hellwig2018-01-101-0/+32
phys_to_dma, dma_to_phys and dma_capable are helpers published by architecture code for use of swiotlb and xen-swiotlb only. Drivers are not supposed to use these directly, but use the DMA API instead. Move these to a new asm/dma-direct.h helper, included by a linux/dma-direct.h wrapper that provides the default linear mapping unless the architecture wants to override it. In the MIPS case the existing dma-coherent.h is reused for now as untangling it will take a bit of work. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Robin Murphy <robin.murphy@arm.com>