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| author | Rob Herring <rob.herring@calxeda.com> | 2012-08-21 12:20:17 +0200 |
|---|---|---|
| committer | Marek Szyprowski <m.szyprowski@samsung.com> | 2012-10-02 08:58:06 +0200 |
| commit | dd37e9405a8e85be49a60b2530efeb5f06bcb753 (patch) | |
| tree | 0480f0c6ed0941eeeba4f94190814e8c710504b6 /arch/arm/include/asm/dma-mapping.h | |
| parent | a0d271cbfed1dd50278c6b06bead3d00ba0a88f9 (diff) | |
| download | op-kernel-dev-dd37e9405a8e85be49a60b2530efeb5f06bcb753.zip op-kernel-dev-dd37e9405a8e85be49a60b2530efeb5f06bcb753.tar.gz | |
ARM: add coherent dma ops
arch_is_coherent is problematic as it is a global symbol. This
doesn't work for multi-platform kernels or platforms which can support
per device coherent DMA.
This adds arm_coherent_dma_ops to be used for devices which connected
coherently (i.e. to the ACP port on Cortex-A9 or A15). The arm_dma_ops
are modified at boot when arch_is_coherent is true.
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Diffstat (limited to 'arch/arm/include/asm/dma-mapping.h')
| -rw-r--r-- | arch/arm/include/asm/dma-mapping.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h index 5c44dcb..2300484 100644 --- a/arch/arm/include/asm/dma-mapping.h +++ b/arch/arm/include/asm/dma-mapping.h @@ -13,6 +13,7 @@ #define DMA_ERROR_CODE (~0) extern struct dma_map_ops arm_dma_ops; +extern struct dma_map_ops arm_coherent_dma_ops; static inline struct dma_map_ops *get_dma_ops(struct device *dev) { |
