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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4568 | Serge | 1 | #ifndef _LINUX_DMA_MAPPING_H |
| 2 | #define _LINUX_DMA_MAPPING_H |
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| 3 | |||
| 6102 | serge | 4 | #include |
| 5 | #include |
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| 6 | #include |
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| 7 | #include |
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| 4568 | Serge | 8 | #include |
| 9 | #include |
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| 10 | |||
| 6102 | serge | 11 | extern void * |
| 12 | dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, |
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| 13 | gfp_t flag); |
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| 14 | #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1)) |
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| 4568 | Serge | 15 | |
| 6102 | serge | 16 | #define DMA_MASK_NONE 0x0ULL |
| 17 | |||
| 18 | static inline int valid_dma_direction(int dma_direction) |
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| 19 | { |
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| 20 | return ((dma_direction == DMA_BIDIRECTIONAL) || |
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| 21 | (dma_direction == DMA_TO_DEVICE) || |
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| 22 | (dma_direction == DMA_FROM_DEVICE)); |
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| 23 | } |
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| 24 | |||
| 25 | static inline int is_device_dma_capable(struct device *dev) |
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| 26 | { |
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| 27 | return dev->dma_mask != NULL && *dev->dma_mask != DMA_MASK_NONE; |
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| 28 | } |
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| 29 | #ifndef dma_max_pfn |
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| 30 | static inline unsigned long dma_max_pfn(struct device *dev) |
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| 31 | { |
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| 32 | return *dev->dma_mask >> PAGE_SHIFT; |
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| 33 | } |
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| 4568 | Serge | 34 | #endif |
| 6102 | serge | 35 | |
| 36 | static inline void *dma_zalloc_coherent(struct device *dev, size_t size, |
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| 37 | dma_addr_t *dma_handle, gfp_t flag) |
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| 38 | { |
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| 39 | void *ret = dma_alloc_coherent(dev, size, dma_handle, |
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| 40 | flag | __GFP_ZERO); |
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| 41 | return ret; |
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| 42 | } |
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| 43 | |||
| 44 | #endif |