projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
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 | |
| 4c1b4622 | 17 | #define DMA_48BIT_MASK 0x0000ffffffffffffULL |
| b8112df7 LR |
18 | #define DMA_40BIT_MASK 0x000000ffffffffffULL |
| 19 | #define DMA_39BIT_MASK 0x0000007fffffffffULL | |
| 1da177e4 | 20 | #define DMA_32BIT_MASK 0x00000000ffffffffULL |
| b8112df7 LR |
21 | #define DMA_31BIT_MASK 0x000000007fffffffULL |
| 22 | #define DMA_30BIT_MASK 0x000000003fffffffULL | |
| 23 | #define DMA_29BIT_MASK 0x000000001fffffffULL | |
| 9d2f928d | 24 | #define DMA_28BIT_MASK 0x000000000fffffffULL |
| 56b146d3 | 25 | #define DMA_24BIT_MASK 0x0000000000ffffffULL |
| 1da177e4 | 26 | |
| d6bd3a39 REB |
27 | static inline int valid_dma_direction(int dma_direction) |
| 28 | { | |
| 29 | return ((dma_direction == DMA_BIDIRECTIONAL) || | |
| 30 | (dma_direction == DMA_TO_DEVICE) || | |
| 31 | (dma_direction == DMA_FROM_DEVICE)); | |
| 32 | } | |
| 33 | ||
| 1b0fac45 | 34 | #ifdef CONFIG_HAS_DMA |
| 1da177e4 | 35 | #include <asm/dma-mapping.h> |
| 1b0fac45 DW |
36 | #else |
| 37 | #include <asm-generic/dma-mapping-broken.h> | |
| 38 | #endif | |
| 1da177e4 LT |
39 | |
| 40 | /* Backwards compat, remove in 2.7.x */ | |
| 41 | #define dma_sync_single dma_sync_single_for_cpu | |
| 42 | #define dma_sync_sg dma_sync_sg_for_cpu | |
| 43 | ||
| 44 | extern u64 dma_get_required_mask(struct device *dev); | |
| 45 | ||
| 46 | /* flags for the coherent memory api */ | |
| 47 | #define DMA_MEMORY_MAP 0x01 | |
| 48 | #define DMA_MEMORY_IO 0x02 | |
| 49 | #define DMA_MEMORY_INCLUDES_CHILDREN 0x04 | |
| 50 | #define DMA_MEMORY_EXCLUSIVE 0x08 | |
| 51 | ||
| 52 | #ifndef ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY | |
| 53 | static inline int | |
| 54 | dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr, | |
| 55 | dma_addr_t device_addr, size_t size, int flags) | |
| 56 | { | |
| 57 | return 0; | |
| 58 | } | |
| 59 | ||
| 60 | static inline void | |
| 61 | dma_release_declared_memory(struct device *dev) | |
| 62 | { | |
| 63 | } | |
| 64 | ||
| 65 | static inline void * | |
| 66 | dma_mark_declared_memory_occupied(struct device *dev, | |
| 67 | dma_addr_t device_addr, size_t size) | |
| 68 | { | |
| 69 | return ERR_PTR(-EBUSY); | |
| 70 | } | |
| 71 | #endif | |
| 72 | ||
| 9ac7849e TH |
73 | /* |
| 74 | * Managed DMA API | |
| 75 | */ | |
| 76 | extern void *dmam_alloc_coherent(struct device *dev, size_t size, | |
| 77 | dma_addr_t *dma_handle, gfp_t gfp); | |
| 78 | extern void dmam_free_coherent(struct device *dev, size_t size, void *vaddr, | |
| 79 | dma_addr_t dma_handle); | |
| 80 | extern void *dmam_alloc_noncoherent(struct device *dev, size_t size, | |
| 81 | dma_addr_t *dma_handle, gfp_t gfp); | |
| 82 | extern void dmam_free_noncoherent(struct device *dev, size_t size, void *vaddr, | |
| 83 | dma_addr_t dma_handle); | |
| 84 | #ifdef ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY | |
| 85 | extern int dmam_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr, | |
| 86 | dma_addr_t device_addr, size_t size, | |
| 87 | int flags); | |
| 88 | extern void dmam_release_declared_memory(struct device *dev); | |
| 89 | #else /* ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY */ | |
| 90 | static inline int dmam_declare_coherent_memory(struct device *dev, | |
| 91 | dma_addr_t bus_addr, dma_addr_t device_addr, | |
| 92 | size_t size, gfp_t gfp) | |
| 93 | { | |
| 94 | return 0; | |
| 95 | } | |
| 1da177e4 | 96 | |
| 9ac7849e TH |
97 | static inline void dmam_release_declared_memory(struct device *dev) |
| 98 | { | |
| 99 | } | |
| 100 | #endif /* ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY */ | |
| 1da177e4 | 101 | |
| 9ac7849e | 102 | #endif |