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| author | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2014-11-20 10:41:35 +0000 |
|---|---|---|
| committer | David Vrabel <david.vrabel@citrix.com> | 2014-12-04 12:41:49 +0000 |
| commit | de7ee503f279c1b454941802972bb9467e3e5749 (patch) | |
| tree | 0cd6e810e848dfdc10e3107c0965de374efa656a /arch/arm64 | |
| parent | 2f91fc331ad495a3e602f3d0e7fd6211b1d91204 (diff) | |
| download | linux-de7ee503f279c1b454941802972bb9467e3e5749.tar.bz2 | |
arm64: introduce is_device_dma_coherent
Introduce a boolean flag and an accessor function to check whether a
device is dma_coherent. Set the flag from set_arch_dma_coherent_ops.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64')
| -rw-r--r-- | arch/arm64/include/asm/device.h | 1 | ||||
| -rw-r--r-- | arch/arm64/include/asm/dma-mapping.h | 7 |
2 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/device.h b/arch/arm64/include/asm/device.h index cf98b362094b..243ef256b8c9 100644 --- a/arch/arm64/include/asm/device.h +++ b/arch/arm64/include/asm/device.h @@ -21,6 +21,7 @@ struct dev_archdata { #ifdef CONFIG_IOMMU_API void *iommu; /* private IOMMU data */ #endif + bool dma_coherent; }; struct pdev_archdata { diff --git a/arch/arm64/include/asm/dma-mapping.h b/arch/arm64/include/asm/dma-mapping.h index adeae3f6f0fc..d34189bceff7 100644 --- a/arch/arm64/include/asm/dma-mapping.h +++ b/arch/arm64/include/asm/dma-mapping.h @@ -54,11 +54,18 @@ static inline void set_dma_ops(struct device *dev, struct dma_map_ops *ops) static inline int set_arch_dma_coherent_ops(struct device *dev) { + dev->archdata.dma_coherent = true; set_dma_ops(dev, &coherent_swiotlb_dma_ops); return 0; } #define set_arch_dma_coherent_ops set_arch_dma_coherent_ops +/* do not use this function in a driver */ +static inline bool is_device_dma_coherent(struct device *dev) +{ + return dev->archdata.dma_coherent; +} + #include <asm-generic/dma-mapping-common.h> static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) |