[IA64] SN specific version of dma_get_required_mask()
[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 #define ARCH_HAS_DMA_GET_REQUIRED_MASK
13
14 struct dma_mapping_ops {
15         int             (*mapping_error)(struct device *dev,
16                                          dma_addr_t dma_addr);
17         void*           (*alloc_coherent)(struct device *dev, size_t size,
18                                 dma_addr_t *dma_handle, gfp_t gfp);
19         void            (*free_coherent)(struct device *dev, size_t size,
20                                 void *vaddr, dma_addr_t dma_handle);
21         dma_addr_t      (*map_single)(struct device *hwdev, unsigned long ptr,
22                                 size_t size, int direction);
23         void            (*unmap_single)(struct device *dev, dma_addr_t addr,
24                                 size_t size, int direction);
25         void            (*sync_single_for_cpu)(struct device *hwdev,
26                                 dma_addr_t dma_handle, size_t size,
27                                 int direction);
28         void            (*sync_single_for_device)(struct device *hwdev,
29                                 dma_addr_t dma_handle, size_t size,
30                                 int direction);
31         void            (*sync_single_range_for_cpu)(struct device *hwdev,
32                                 dma_addr_t dma_handle, unsigned long offset,
33                                 size_t size, int direction);
34         void            (*sync_single_range_for_device)(struct device *hwdev,
35                                 dma_addr_t dma_handle, unsigned long offset,
36                                 size_t size, int direction);
37         void            (*sync_sg_for_cpu)(struct device *hwdev,
38                                 struct scatterlist *sg, int nelems,
39                                 int direction);
40         void            (*sync_sg_for_device)(struct device *hwdev,
41                                 struct scatterlist *sg, int nelems,
42                                 int direction);
43         int             (*map_sg)(struct device *hwdev, struct scatterlist *sg,
44                                 int nents, int direction);
45         void            (*unmap_sg)(struct device *hwdev,
46                                 struct scatterlist *sg, int nents,
47                                 int direction);
48         int             (*dma_supported_op)(struct device *hwdev, u64 mask);
49         int             is_phys;
50 };
51
52 extern struct dma_mapping_ops *dma_ops;
53 extern struct ia64_machine_vector ia64_mv;
54 extern void set_iommu_machvec(void);
55
56 #define dma_alloc_coherent(dev, size, handle, gfp)      \
57         platform_dma_alloc_coherent(dev, size, handle, (gfp) | GFP_DMA)
58
59 /* coherent mem. is cheap */
60 static inline void *
61 dma_alloc_noncoherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
62                       gfp_t flag)
63 {
64         return dma_alloc_coherent(dev, size, dma_handle, flag);
65 }
66 #define dma_free_coherent       platform_dma_free_coherent
67 static inline void
68 dma_free_noncoherent(struct device *dev, size_t size, void *cpu_addr,
69                      dma_addr_t dma_handle)
70 {
71         dma_free_coherent(dev, size, cpu_addr, dma_handle);
72 }
73 #define dma_map_single_attrs    platform_dma_map_single_attrs
74 static inline dma_addr_t dma_map_single(struct device *dev, void *cpu_addr,
75                                         size_t size, int dir)
76 {
77         return dma_map_single_attrs(dev, cpu_addr, size, dir, NULL);
78 }
79 #define dma_map_sg_attrs        platform_dma_map_sg_attrs
80 static inline int dma_map_sg(struct device *dev, struct scatterlist *sgl,
81                              int nents, int dir)
82 {
83         return dma_map_sg_attrs(dev, sgl, nents, dir, NULL);
84 }
85 #define dma_unmap_single_attrs  platform_dma_unmap_single_attrs
86 static inline void dma_unmap_single(struct device *dev, dma_addr_t cpu_addr,
87                                     size_t size, int dir)
88 {
89         return dma_unmap_single_attrs(dev, cpu_addr, size, dir, NULL);
90 }
91 #define dma_unmap_sg_attrs      platform_dma_unmap_sg_attrs
92 static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sgl,
93                                 int nents, int dir)
94 {
95         return dma_unmap_sg_attrs(dev, sgl, nents, dir, NULL);
96 }
97 #define dma_sync_single_for_cpu platform_dma_sync_single_for_cpu
98 #define dma_sync_sg_for_cpu     platform_dma_sync_sg_for_cpu
99 #define dma_sync_single_for_device platform_dma_sync_single_for_device
100 #define dma_sync_sg_for_device  platform_dma_sync_sg_for_device
101 #define dma_mapping_error       platform_dma_mapping_error
102
103 #define dma_map_page(dev, pg, off, size, dir)                           \
104         dma_map_single(dev, page_address(pg) + (off), (size), (dir))
105 #define dma_unmap_page(dev, dma_addr, size, dir)                        \
106         dma_unmap_single(dev, dma_addr, size, dir)
107
108 /*
109  * Rest of this file is part of the "Advanced DMA API".  Use at your own risk.
110  * See Documentation/DMA-API.txt for details.
111  */
112
113 #define dma_sync_single_range_for_cpu(dev, dma_handle, offset, size, dir)       \
114         dma_sync_single_for_cpu(dev, dma_handle, size, dir)
115 #define dma_sync_single_range_for_device(dev, dma_handle, offset, size, dir)    \
116         dma_sync_single_for_device(dev, dma_handle, size, dir)
117
118 #define dma_supported           platform_dma_supported
119
120 static inline int
121 dma_set_mask (struct device *dev, u64 mask)
122 {
123         if (!dev->dma_mask || !dma_supported(dev, mask))
124                 return -EIO;
125         *dev->dma_mask = mask;
126         return 0;
127 }
128
129 extern int dma_get_cache_alignment(void);
130
131 static inline void
132 dma_cache_sync (struct device *dev, void *vaddr, size_t size,
133         enum dma_data_direction dir)
134 {
135         /*
136          * IA-64 is cache-coherent, so this is mostly a no-op.  However, we do need to
137          * ensure that dma_cache_sync() enforces order, hence the mb().
138          */
139         mb();
140 }
141
142 #define dma_is_consistent(d, h) (1)     /* all we do is coherent memory... */
143
144 static inline struct dma_mapping_ops *get_dma_ops(struct device *dev)
145 {
146         return dma_ops;
147 }
148
149
150
151 #endif /* _ASM_IA64_DMA_MAPPING_H */