1 #ifndef _ASM_IA64_DMA_MAPPING_H
2 #define _ASM_IA64_DMA_MAPPING_H
3 
4 /*
5  * Copyright (C) 2003-2004 Hewlett-Packard Co
6  *	David Mosberger-Tang <davidm@hpl.hp.com>
7  */
8 #include <asm/machvec.h>
9 #include <linux/scatterlist.h>
10 #include <asm/swiotlb.h>
11 
12 #define ARCH_HAS_DMA_GET_REQUIRED_MASK
13 
14 extern struct dma_map_ops *dma_ops;
15 extern struct ia64_machine_vector ia64_mv;
16 extern void set_iommu_machvec(void);
17 
18 extern void machvec_dma_sync_single(struct device *, dma_addr_t, size_t,
19 				    enum dma_data_direction);
20 extern void machvec_dma_sync_sg(struct device *, struct scatterlist *, int,
21 				enum dma_data_direction);
22 
23 static inline void *dma_alloc_coherent(struct device *dev, size_t size,
24 				       dma_addr_t *daddr, gfp_t gfp)
25 {
26 	struct dma_map_ops *ops = platform_dma_get_ops(dev);
27 	return ops->alloc_coherent(dev, size, daddr, gfp);
28 }
29 
30 static inline void dma_free_coherent(struct device *dev, size_t size,
31 				     void *caddr, dma_addr_t daddr)
32 {
33 	struct dma_map_ops *ops = platform_dma_get_ops(dev);
34 	ops->free_coherent(dev, size, caddr, daddr);
35 }
36 
37 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
38 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
39 
40 static inline dma_addr_t dma_map_single_attrs(struct device *dev,
41 					      void *caddr, size_t size,
42 					      enum dma_data_direction dir,
43 					      struct dma_attrs *attrs)
44 {
45 	struct dma_map_ops *ops = platform_dma_get_ops(dev);
46 	return ops->map_page(dev, virt_to_page(caddr),
47 			     (unsigned long)caddr & ~PAGE_MASK, size,
48 			     dir, attrs);
49 }
50 
51 static inline void dma_unmap_single_attrs(struct device *dev, dma_addr_t daddr,
52 					  size_t size,
53 					  enum dma_data_direction dir,
54 					  struct dma_attrs *attrs)
55 {
56 	struct dma_map_ops *ops = platform_dma_get_ops(dev);
57 	ops->unmap_page(dev, daddr, size, dir, attrs);
58 }
59 
60 #define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, NULL)
61 #define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, NULL)
62 
63 static inline int dma_map_sg_attrs(struct device *dev, struct scatterlist *sgl,
64 				   int nents, enum dma_data_direction dir,
65 				   struct dma_attrs *attrs)
66 {
67 	struct dma_map_ops *ops = platform_dma_get_ops(dev);
68 	return ops->map_sg(dev, sgl, nents, dir, attrs);
69 }
70 
71 static inline void dma_unmap_sg_attrs(struct device *dev,
72 				      struct scatterlist *sgl, int nents,
73 				      enum dma_data_direction dir,
74 				      struct dma_attrs *attrs)
75 {
76 	struct dma_map_ops *ops = platform_dma_get_ops(dev);
77 	ops->unmap_sg(dev, sgl, nents, dir, attrs);
78 }
79 
80 #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, NULL)
81 #define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, NULL)
82 
83 static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t daddr,
84 					   size_t size,
85 					   enum dma_data_direction dir)
86 {
87 	struct dma_map_ops *ops = platform_dma_get_ops(dev);
88 	ops->sync_single_for_cpu(dev, daddr, size, dir);
89 }
90 
91 static inline void dma_sync_sg_for_cpu(struct device *dev,
92 				       struct scatterlist *sgl,
93 				       int nents, enum dma_data_direction dir)
94 {
95 	struct dma_map_ops *ops = platform_dma_get_ops(dev);
96 	ops->sync_sg_for_cpu(dev, sgl, nents, dir);
97 }
98 
99 static inline void dma_sync_single_for_device(struct device *dev,
100 					      dma_addr_t daddr,
101 					      size_t size,
102 					      enum dma_data_direction dir)
103 {
104 	struct dma_map_ops *ops = platform_dma_get_ops(dev);
105 	ops->sync_single_for_device(dev, daddr, size, dir);
106 }
107 
108 static inline void dma_sync_sg_for_device(struct device *dev,
109 					  struct scatterlist *sgl,
110 					  int nents,
111 					  enum dma_data_direction dir)
112 {
113 	struct dma_map_ops *ops = platform_dma_get_ops(dev);
114 	ops->sync_sg_for_device(dev, sgl, nents, dir);
115 }
116 
117 static inline int dma_mapping_error(struct device *dev, dma_addr_t daddr)
118 {
119 	struct dma_map_ops *ops = platform_dma_get_ops(dev);
120 	return ops->mapping_error(dev, daddr);
121 }
122 
123 static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
124 				      size_t offset, size_t size,
125 				      enum dma_data_direction dir)
126 {
127 	struct dma_map_ops *ops = platform_dma_get_ops(dev);
128 	return ops->map_page(dev, page, offset, size, dir, NULL);
129 }
130 
131 static inline void dma_unmap_page(struct device *dev, dma_addr_t addr,
132 				  size_t size, enum dma_data_direction dir)
133 {
134 	dma_unmap_single(dev, addr, size, dir);
135 }
136 
137 /*
138  * Rest of this file is part of the "Advanced DMA API".  Use at your own risk.
139  * See Documentation/DMA-API.txt for details.
140  */
141 
142 #define dma_sync_single_range_for_cpu(dev, dma_handle, offset, size, dir)	\
143 	dma_sync_single_for_cpu(dev, dma_handle, size, dir)
144 #define dma_sync_single_range_for_device(dev, dma_handle, offset, size, dir)	\
145 	dma_sync_single_for_device(dev, dma_handle, size, dir)
146 
147 static inline int dma_supported(struct device *dev, u64 mask)
148 {
149 	struct dma_map_ops *ops = platform_dma_get_ops(dev);
150 	return ops->dma_supported(dev, mask);
151 }
152 
153 static inline int
154 dma_set_mask (struct device *dev, u64 mask)
155 {
156 	if (!dev->dma_mask || !dma_supported(dev, mask))
157 		return -EIO;
158 	*dev->dma_mask = mask;
159 	return 0;
160 }
161 
162 extern int dma_get_cache_alignment(void);
163 
164 static inline void
165 dma_cache_sync (struct device *dev, void *vaddr, size_t size,
166 	enum dma_data_direction dir)
167 {
168 	/*
169 	 * IA-64 is cache-coherent, so this is mostly a no-op.  However, we do need to
170 	 * ensure that dma_cache_sync() enforces order, hence the mb().
171 	 */
172 	mb();
173 }
174 
175 #define dma_is_consistent(d, h)	(1)	/* all we do is coherent memory... */
176 
177 #endif /* _ASM_IA64_DMA_MAPPING_H */
178