1 #ifndef _ASM_DMA_MAPPING_H
2 #define _ASM_DMA_MAPPING_H
3 
4 #include <asm/scatterlist.h>
5 #include <asm/dma-coherence.h>
6 #include <asm/cache.h>
7 #include <asm-generic/dma-coherent.h>
8 
9 #ifndef CONFIG_SGI_IP27 /* Kludge to fix 2.6.39 build for IP27 */
10 #include <dma-coherence.h>
11 #endif
12 
13 extern struct dma_map_ops *mips_dma_map_ops;
14 
15 static inline struct dma_map_ops *get_dma_ops(struct device *dev)
16 {
17 	if (dev && dev->archdata.dma_ops)
18 		return dev->archdata.dma_ops;
19 	else
20 		return mips_dma_map_ops;
21 }
22 
23 static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
24 {
25 	if (!dev->dma_mask)
26 		return 0;
27 
28 	return addr + size <= *dev->dma_mask;
29 }
30 
31 static inline void dma_mark_clean(void *addr, size_t size) {}
32 
33 #include <asm-generic/dma-mapping-common.h>
34 
35 static inline int dma_supported(struct device *dev, u64 mask)
36 {
37 	struct dma_map_ops *ops = get_dma_ops(dev);
38 	return ops->dma_supported(dev, mask);
39 }
40 
41 static inline int dma_mapping_error(struct device *dev, u64 mask)
42 {
43 	struct dma_map_ops *ops = get_dma_ops(dev);
44 
45 	debug_dma_mapping_error(dev, mask);
46 	return ops->mapping_error(dev, mask);
47 }
48 
49 static inline int
50 dma_set_mask(struct device *dev, u64 mask)
51 {
52 	if(!dev->dma_mask || !dma_supported(dev, mask))
53 		return -EIO;
54 
55 	*dev->dma_mask = mask;
56 
57 	return 0;
58 }
59 
60 extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
61 	       enum dma_data_direction direction);
62 
63 #define dma_alloc_coherent(d,s,h,f)	dma_alloc_attrs(d,s,h,f,NULL)
64 
65 static inline void *dma_alloc_attrs(struct device *dev, size_t size,
66 				    dma_addr_t *dma_handle, gfp_t gfp,
67 				    struct dma_attrs *attrs)
68 {
69 	void *ret;
70 	struct dma_map_ops *ops = get_dma_ops(dev);
71 
72 	ret = ops->alloc(dev, size, dma_handle, gfp, attrs);
73 
74 	debug_dma_alloc_coherent(dev, size, *dma_handle, ret);
75 
76 	return ret;
77 }
78 
79 #define dma_free_coherent(d,s,c,h) dma_free_attrs(d,s,c,h,NULL)
80 
81 static inline void dma_free_attrs(struct device *dev, size_t size,
82 				  void *vaddr, dma_addr_t dma_handle,
83 				  struct dma_attrs *attrs)
84 {
85 	struct dma_map_ops *ops = get_dma_ops(dev);
86 
87 	ops->free(dev, size, vaddr, dma_handle, attrs);
88 
89 	debug_dma_free_coherent(dev, size, vaddr, dma_handle);
90 }
91 
92 
93 void *dma_alloc_noncoherent(struct device *dev, size_t size,
94 			   dma_addr_t *dma_handle, gfp_t flag);
95 
96 void dma_free_noncoherent(struct device *dev, size_t size,
97 			 void *vaddr, dma_addr_t dma_handle);
98 
99 #endif /* _ASM_DMA_MAPPING_H */
100