Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs
[pandora-kernel.git] / arch / microblaze / include / asm / dma-mapping.h
1 /*
2  * Copyright (C) 2006 Atmark Techno, Inc.
3  *
4  * This file is subject to the terms and conditions of the GNU General Public
5  * License. See the file "COPYING" in the main directory of this archive
6  * for more details.
7  */
8
9 #ifndef _ASM_MICROBLAZE_DMA_MAPPING_H
10 #define _ASM_MICROBLAZE_DMA_MAPPING_H
11
12 #include <asm/cacheflush.h>
13 #include <linux/io.h>
14 #include <linux/bug.h>
15
16 struct scatterlist;
17
18 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
19 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
20
21 /* FIXME */
22 static inline int
23 dma_supported(struct device *dev, u64 mask)
24 {
25         return 1;
26 }
27
28 static inline dma_addr_t
29 dma_map_page(struct device *dev, struct page *page,
30         unsigned long offset, size_t size,
31         enum dma_data_direction direction)
32 {
33         BUG();
34         return 0;
35 }
36
37 static inline void
38 dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
39         enum dma_data_direction direction)
40 {
41         BUG();
42 }
43
44 static inline int
45 dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
46         enum dma_data_direction direction)
47 {
48         BUG();
49         return 0;
50 }
51
52 static inline void
53 dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
54         enum dma_data_direction direction)
55 {
56         BUG();
57 }
58
59 static inline void
60 dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
61                         enum dma_data_direction direction)
62 {
63         BUG();
64 }
65
66 static inline void
67 dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
68                 size_t size, enum dma_data_direction direction)
69 {
70         BUG();
71 }
72
73 static inline void
74 dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
75                 enum dma_data_direction direction)
76 {
77         BUG();
78 }
79
80 static inline void
81 dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
82                 enum dma_data_direction direction)
83 {
84         BUG();
85 }
86
87 static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
88 {
89         return 0;
90 }
91
92 static inline void *dma_alloc_coherent(struct device *dev, size_t size,
93                                 dma_addr_t *dma_handle, int flag)
94 {
95         return NULL; /* consistent_alloc(flag, size, dma_handle); */
96 }
97
98 static inline void dma_free_coherent(struct device *dev, size_t size,
99                         void *vaddr, dma_addr_t dma_handle)
100 {
101         BUG();
102 }
103
104 static inline dma_addr_t
105 dma_map_single(struct device *dev, void *ptr, size_t size,
106         enum dma_data_direction direction)
107 {
108         BUG_ON(direction == DMA_NONE);
109
110         return virt_to_bus(ptr);
111 }
112
113 static inline void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
114                                     size_t size,
115                                     enum dma_data_direction direction)
116 {
117         switch (direction) {
118         case DMA_FROM_DEVICE:
119                 flush_dcache_range((unsigned)dma_addr,
120                         (unsigned)dma_addr + size);
121                         /* Fall through */
122         case DMA_TO_DEVICE:
123                 break;
124         default:
125                 BUG();
126         }
127 }
128
129 #endif /* _ASM_MICROBLAZE_DMA_MAPPING_H */