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| author | Christoph Hellwig <hch@lst.de> | 2018-01-10 16:21:13 +0100 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2018-01-10 16:40:54 +0100 |
| commit | ea8c64ace86647260ec4255f483e5844d62af2df (patch) | |
| tree | 420f44f5f8c6839d96e814066cc6a8e80957bf01 /arch/ia64 | |
| parent | mips: fix an off-by-one in dma_capable (diff) | |
| download | linux-ea8c64ace86647260ec4255f483e5844d62af2df.tar.xz linux-ea8c64ace86647260ec4255f483e5844d62af2df.zip | |
dma-mapping: move swiotlb arch helpers to a new header
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>
Diffstat (limited to 'arch/ia64')
| -rw-r--r-- | arch/ia64/include/asm/dma-mapping.h | 18 |
1 files changed, 0 insertions, 18 deletions
diff --git a/arch/ia64/include/asm/dma-mapping.h b/arch/ia64/include/asm/dma-mapping.h index c1bab526a046..eabee56d995c 100644 --- a/arch/ia64/include/asm/dma-mapping.h +++ b/arch/ia64/include/asm/dma-mapping.h @@ -27,22 +27,4 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) return platform_dma_get_ops(NULL); } -static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) -{ - if (!dev->dma_mask) - return 0; - - return addr + size - 1 <= *dev->dma_mask; -} - -static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) -{ - return paddr; -} - -static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr) -{ - return daddr; -} - #endif /* _ASM_IA64_DMA_MAPPING_H */ |