[PATCH] Intruduce DMA_28BIT_MASK
[linux-2.6.git] / include / linux / dma-mapping.h
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_40BIT_MASK  0x000000ffffffffffULL
18 #define DMA_39BIT_MASK  0x0000007fffffffffULL
19 #define DMA_32BIT_MASK  0x00000000ffffffffULL
20 #define DMA_31BIT_MASK  0x000000007fffffffULL
21 #define DMA_30BIT_MASK  0x000000003fffffffULL
22 #define DMA_29BIT_MASK  0x000000001fffffffULL
23 #define DMA_28BIT_MASK  0x000000000fffffffULL
24
25 #include <asm/dma-mapping.h>
26
27 /* Backwards compat, remove in 2.7.x */
28 #define dma_sync_single         dma_sync_single_for_cpu
29 #define dma_sync_sg             dma_sync_sg_for_cpu
30
31 extern u64 dma_get_required_mask(struct device *dev);
32
33 /* flags for the coherent memory api */
34 #define DMA_MEMORY_MAP                  0x01
35 #define DMA_MEMORY_IO                   0x02
36 #define DMA_MEMORY_INCLUDES_CHILDREN    0x04
37 #define DMA_MEMORY_EXCLUSIVE            0x08
38
39 #ifndef ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
40 static inline int
41 dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
42                             dma_addr_t device_addr, size_t size, int flags)
43 {
44         return 0;
45 }
46
47 static inline void
48 dma_release_declared_memory(struct device *dev)
49 {
50 }
51
52 static inline void *
53 dma_mark_declared_memory_occupied(struct device *dev,
54                                   dma_addr_t device_addr, size_t size)
55 {
56         return ERR_PTR(-EBUSY);
57 }
58 #endif
59
60 #endif
61
62