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| author | Jayachandran C <jchandra@broadcom.com> | 2013-06-10 08:28:08 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2013-06-13 17:46:40 +0200 |
| commit | 4954a9a211f1863e3ca3958fd56ad06e1bddc22d (patch) | |
| tree | c5ce63b246124561b138da90056d17cf2ee4084d /arch/mips/include/asm | |
| parent | MIPS: Kconfig: Remove extranous help keyword. (diff) | |
| download | linux-4954a9a211f1863e3ca3958fd56ad06e1bddc22d.tar.xz linux-4954a9a211f1863e3ca3958fd56ad06e1bddc22d.zip | |
MIPS: Support SWIOTLB in default dma operations
Provide a default implementation of phys_to_dma and dma_to_phys in
mach-generic/dma_coherence.h.
If CONFIG_NEED_SG_DMA_LENGTH is defined, the dma_length field in
struct scatterlist is used. Set this up in mips_dma_map_sg so that
the default mips DMA ops can be used when SWIOTLB is enabled.
Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5409/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include/asm')
| -rw-r--r-- | arch/mips/include/asm/mach-generic/dma-coherence.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/mips/include/asm/mach-generic/dma-coherence.h b/arch/mips/include/asm/mach-generic/dma-coherence.h index fe23034aaf72..74cb99257d5b 100644 --- a/arch/mips/include/asm/mach-generic/dma-coherence.h +++ b/arch/mips/include/asm/mach-generic/dma-coherence.h @@ -66,4 +66,16 @@ static inline int plat_device_is_coherent(struct device *dev) #endif } +#ifdef CONFIG_SWIOTLB +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 + #endif /* __ASM_MACH_GENERIC_DMA_COHERENCE_H */ |