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arm64: introduce is_device_dma_coherent

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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>
This commit is contained in:
Stefano Stabellini 2014-11-20 10:41:35 +00:00 committed by David Vrabel
parent 2f91fc331a
commit de7ee503f2
2 changed files with 8 additions and 0 deletions
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1
arch/arm64/include/asm/device.h
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@ -21,6 +21,7 @@ struct dev_archdata {
#ifdef CONFIG_IOMMU_API #ifdef CONFIG_IOMMU_API
void *iommu; /* private IOMMU data */ void *iommu; /* private IOMMU data */
#endif #endif
bool dma_coherent;
}; };
struct pdev_archdata { struct pdev_archdata {

7
arch/arm64/include/asm/dma-mapping.h
View File

@ -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) static inline int set_arch_dma_coherent_ops(struct device *dev)
{ {
dev->archdata.dma_coherent = true;
set_dma_ops(dev, &coherent_swiotlb_dma_ops); set_dma_ops(dev, &coherent_swiotlb_dma_ops);
return 0; return 0;
} }
#define set_arch_dma_coherent_ops set_arch_dma_coherent_ops #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> #include <asm-generic/dma-mapping-common.h>
static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)