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
dma_declare_coherent_memory(struct device * dev,dma_addr_t bus_addr,dma_addr_t device_addr,size_t size,int flags)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
dma_release_declared_memory(struct device * dev)50 dma_release_declared_memory(struct device *dev)
51 {
52 }
53
54 static inline void *
dma_mark_declared_memory_occupied(struct device * dev,dma_addr_t device_addr,size_t size)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