bbab7e2b0fc92f3f546a48fea7095d040975422b
[linux-2.6.git] / arch / ia64 / include / asm / dma-mapping.h
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 struct dma_mapping_ops {
13         int             (*mapping_error)(struct device *dev,
14                                          dma_addr_t dma_addr);
15         void*           (*alloc_coherent)(struct device *dev, size_t size,
16                                 dma_addr_t *dma_handle, gfp_t gfp);
17         void            (*free_coherent)(struct device *dev, size_t size,
18                                 void *vaddr, dma_addr_t dma_handle);
19         dma_addr_t      (*map_single)(struct device *hwdev, unsigned long ptr,
20                                 size_t size, int direction);
21         void            (*unmap_single)(struct device *dev, dma_addr_t addr,
22                                 size_t size, int direction);
23         void            (*sync_single_for_cpu)(struct device *hwdev,
24                                 dma_addr_t dma_handle, size_t size,
25                                 int direction);
26         void            (*sync_single_for_device)(struct device *hwdev,
27                                 dma_addr_t dma_handle, size_t size,
28                                 int direction);
29         void            (*sync_single_range_for_cpu)(struct device *hwdev,
30                                 dma_addr_t dma_handle, unsigned long offset,
31                                 size_t size, int direction);
32         void            (*sync_single_range_for_device)(struct device *hwdev,
33                                 dma_addr_t dma_handle, unsigned long offset,
34                                 size_t size, int direction);
35         void            (*sync_sg_for_cpu)(struct device *hwdev,
36                                 struct scatterlist *sg, int nelems,
37                                 int direction);
38         void            (*sync_sg_for_device)(struct device *hwdev,
39                                 struct scatterlist *sg, int nelems,
40                                 int direction);
41         int             (*map_sg)(struct device *hwdev, struct scatterlist *sg,
42                                 int nents, int direction);
43         void            (*unmap_sg)(struct device *hwdev,
44                                 struct scatterlist *sg, int nents,
45                                 int direction);
46         int             (*dma_supported_op)(struct device *hwdev, u64 mask);
47         int             is_phys;
48 };
49
50 extern struct dma_mapping_ops *dma_ops;
51 extern struct ia64_machine_vector ia64_mv;
52 extern void set_iommu_machvec(void);
53
54 #define dma_alloc_coherent(dev, size, handle, gfp)      \
55         platform_dma_alloc_coherent(dev, size, handle, (gfp) | GFP_DMA)
56
57 /* coherent mem. is cheap */
58 static inline void *
59 dma_alloc_noncoherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
60                       gfp_t flag)
61 {
62         return dma_alloc_coherent(dev, size, dma_handle, flag);
63 }
64 #define dma_free_coherent       platform_dma_free_coherent
65 static inline void
66 dma_free_noncoherent(struct device *dev, size_t size, void *cpu_addr,
67                      dma_addr_t dma_handle)
68 {
69         dma_free_coherent(dev, size, cpu_addr, dma_handle);
70 }
71 #define dma_map_single_attrs    platform_dma_map_single_attrs
72 static inline dma_addr_t dma_map_single(struct device *dev, void *cpu_addr,
73                                         size_t size, int dir)
74 {
75         return dma_map_single_attrs(dev, cpu_addr, size, dir, NULL);
76 }
77 #define dma_map_sg_attrs        platform_dma_map_sg_attrs
78 static inline int dma_map_sg(struct device *dev, struct scatterlist *sgl,
79                              int nents, int dir)
80 {
81         return dma_map_sg_attrs(dev, sgl, nents, dir, NULL);
82 }
83 #define dma_unmap_single_attrs  platform_dma_unmap_single_attrs
84 static inline void dma_unmap_single(struct device *dev, dma_addr_t cpu_addr,
85                                     size_t size, int dir)
86 {
87         return dma_unmap_single_attrs(dev, cpu_addr, size, dir, NULL);
88 }
89 #define dma_unmap_sg_attrs      platform_dma_unmap_sg_attrs
90 static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sgl,
91                                 int nents, int dir)
92 {
93         return dma_unmap_sg_attrs(dev, sgl, nents, dir, NULL);
94 }
95 #define dma_sync_single_for_cpu platform_dma_sync_single_for_cpu
96 #define dma_sync_sg_for_cpu     platform_dma_sync_sg_for_cpu
97 #define dma_sync_single_for_device platform_dma_sync_single_for_device
98 #define dma_sync_sg_for_device  platform_dma_sync_sg_for_device
99 #define dma_mapping_error       platform_dma_mapping_error
100
101 #define dma_map_page(dev, pg, off, size, dir)                           \
102         dma_map_single(dev, page_address(pg) + (off), (size), (dir))
103 #define dma_unmap_page(dev, dma_addr, size, dir)                        \
104         dma_unmap_single(dev, dma_addr, size, dir)
105
106 /*
107  * Rest of this file is part of the "Advanced DMA API".  Use at your own risk.
108  * See Documentation/DMA-API.txt for details.
109  */
110
111 #define dma_sync_single_range_for_cpu(dev, dma_handle, offset, size, dir)       \
112         dma_sync_single_for_cpu(dev, dma_handle, size, dir)
113 #define dma_sync_single_range_for_device(dev, dma_handle, offset, size, dir)    \
114         dma_sync_single_for_device(dev, dma_handle, size, dir)
115
116 #define dma_supported           platform_dma_supported
117
118 static inline int
119 dma_set_mask (struct device *dev, u64 mask)
120 {
121         if (!dev->dma_mask || !dma_supported(dev, mask))
122                 return -EIO;
123         *dev->dma_mask = mask;
124         return 0;
125 }
126
127 extern int dma_get_cache_alignment(void);
128
129 static inline void
130 dma_cache_sync (struct device *dev, void *vaddr, size_t size,
131         enum dma_data_direction dir)
132 {
133         /*
134          * IA-64 is cache-coherent, so this is mostly a no-op.  However, we do need to
135          * ensure that dma_cache_sync() enforces order, hence the mb().
136          */
137         mb();
138 }
139
140 #define dma_is_consistent(d, h) (1)     /* all we do is coherent memory... */
141
142 static inline struct dma_mapping_ops *get_dma_ops(struct device *dev)
143 {
144         return dma_ops;
145 }
146
147
148
149 #endif /* _ASM_IA64_DMA_MAPPING_H */