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