| 1,8 → 1,44 |
|---|
| #ifndef _LINUX_DMA_MAPPING_H |
| #define _LINUX_DMA_MAPPING_H |
| |
| #include <linux/sizes.h> |
| #include <linux/string.h> |
| #include <linux/device.h> |
| #include <linux/err.h> |
| #include <linux/dma-direction.h> |
| #include <linux/scatterlist.h> |
| |
| extern void * |
| dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, |
| gfp_t flag); |
| #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1)) |
| |
| #define DMA_MASK_NONE 0x0ULL |
| |
| static inline int valid_dma_direction(int dma_direction) |
| { |
| return ((dma_direction == DMA_BIDIRECTIONAL) || |
| (dma_direction == DMA_TO_DEVICE) || |
| (dma_direction == DMA_FROM_DEVICE)); |
| } |
| |
| static inline int is_device_dma_capable(struct device *dev) |
| { |
| return dev->dma_mask != NULL && *dev->dma_mask != DMA_MASK_NONE; |
| } |
| #ifndef dma_max_pfn |
| static inline unsigned long dma_max_pfn(struct device *dev) |
| { |
| return *dev->dma_mask >> PAGE_SHIFT; |
| } |
| #endif |
| |
| static inline void *dma_zalloc_coherent(struct device *dev, size_t size, |
| dma_addr_t *dma_handle, gfp_t flag) |
| { |
| void *ret = dma_alloc_coherent(dev, size, dma_handle, |
| flag | __GFP_ZERO); |
| return ret; |
| } |
| |
| #endif |