1 #ifndef _ASM_LINUX_DMA_MAPPING_H
2 #define _ASM_LINUX_DMA_MAPPING_H
4 #include <linux/device.h>
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,
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
27 static inline int valid_dma_direction(int dma_direction
)
29 return ((dma_direction
== DMA_BIDIRECTIONAL
) ||
30 (dma_direction
== DMA_TO_DEVICE
) ||
31 (dma_direction
== DMA_FROM_DEVICE
));
34 #include <asm/dma-mapping.h>
36 /* Backwards compat, remove in 2.7.x */
37 #define dma_sync_single dma_sync_single_for_cpu
38 #define dma_sync_sg dma_sync_sg_for_cpu
40 extern u64
dma_get_required_mask(struct device
*dev
);
42 /* flags for the coherent memory api */
43 #define DMA_MEMORY_MAP 0x01
44 #define DMA_MEMORY_IO 0x02
45 #define DMA_MEMORY_INCLUDES_CHILDREN 0x04
46 #define DMA_MEMORY_EXCLUSIVE 0x08
48 #ifndef ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
50 dma_declare_coherent_memory(struct device
*dev
, dma_addr_t bus_addr
,
51 dma_addr_t device_addr
, size_t size
, int flags
)
57 dma_release_declared_memory(struct device
*dev
)
62 dma_mark_declared_memory_occupied(struct device
*dev
,
63 dma_addr_t device_addr
, size_t size
)
65 return ERR_PTR(-EBUSY
);
72 extern void *dmam_alloc_coherent(struct device
*dev
, size_t size
,
73 dma_addr_t
*dma_handle
, gfp_t gfp
);
74 extern void dmam_free_coherent(struct device
*dev
, size_t size
, void *vaddr
,
75 dma_addr_t dma_handle
);
76 extern void *dmam_alloc_noncoherent(struct device
*dev
, size_t size
,
77 dma_addr_t
*dma_handle
, gfp_t gfp
);
78 extern void dmam_free_noncoherent(struct device
*dev
, size_t size
, void *vaddr
,
79 dma_addr_t dma_handle
);
80 #ifdef ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
81 extern int dmam_declare_coherent_memory(struct device
*dev
, dma_addr_t bus_addr
,
82 dma_addr_t device_addr
, size_t size
,
84 extern void dmam_release_declared_memory(struct device
*dev
);
85 #else /* ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY */
86 static inline int dmam_declare_coherent_memory(struct device
*dev
,
87 dma_addr_t bus_addr
, dma_addr_t device_addr
,
88 size_t size
, gfp_t gfp
)
93 static inline void dmam_release_declared_memory(struct device
*dev
)
96 #endif /* ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY */