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C/C++ Source or Header  |  2006-08-11  |  1.6 KB  |  65 lines
  1. #ifndef _ASM_LINUX_DMA_MAPPING_H
  2. #define _ASM_LINUX_DMA_MAPPING_H
  3.  
  4. #include <linux/device.h>
  5. #include <linux/err.h>
  6.  
  7. /* These definitions mirror those in pci.h, so they can be used
  8.  * interchangeably with their PCI_ counterparts */
  9. enum dma_data_direction {
  10.     DMA_BIDIRECTIONAL = 0,
  11.     DMA_TO_DEVICE = 1,
  12.     DMA_FROM_DEVICE = 2,
  13.     DMA_NONE = 3,
  14. };
  15.  
  16. #define DMA_64BIT_MASK    0xffffffffffffffffULL
  17. #define DMA_48BIT_MASK    0x0000ffffffffffffULL
  18. #define DMA_40BIT_MASK    0x000000ffffffffffULL
  19. #define DMA_39BIT_MASK    0x0000007fffffffffULL
  20. #define DMA_32BIT_MASK    0x00000000ffffffffULL
  21. #define DMA_31BIT_MASK    0x000000007fffffffULL
  22. #define DMA_30BIT_MASK    0x000000003fffffffULL
  23. #define DMA_29BIT_MASK    0x000000001fffffffULL
  24. #define DMA_28BIT_MASK    0x000000000fffffffULL
  25. #define DMA_24BIT_MASK    0x0000000000ffffffULL
  26.  
  27. #include <asm/dma-mapping.h>
  28.  
  29. /* Backwards compat, remove in 2.7.x */
  30. #define dma_sync_single        dma_sync_single_for_cpu
  31. #define dma_sync_sg        dma_sync_sg_for_cpu
  32.  
  33. extern u64 dma_get_required_mask(struct device *dev);
  34.  
  35. /* flags for the coherent memory api */
  36. #define    DMA_MEMORY_MAP            0x01
  37. #define DMA_MEMORY_IO            0x02
  38. #define DMA_MEMORY_INCLUDES_CHILDREN    0x04
  39. #define DMA_MEMORY_EXCLUSIVE        0x08
  40.  
  41. #ifndef ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
  42. static inline int
  43. dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
  44.                 dma_addr_t device_addr, size_t size, int flags)
  45. {
  46.     return 0;
  47. }
  48.  
  49. static inline void
  50. dma_release_declared_memory(struct device *dev)
  51. {
  52. }
  53.  
  54. static inline void *
  55. dma_mark_declared_memory_occupied(struct device *dev,
  56.                   dma_addr_t device_addr, size_t size)
  57. {
  58.     return ERR_PTR(-EBUSY);
  59. }
  60. #endif
  61.  
  62. #endif
  63.  
  64.  
  65.