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[linux-2.6] / include / asm-ia64 / 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
11 #define dma_alloc_coherent      platform_dma_alloc_coherent
12 /* coherent mem. is cheap */
13 static inline void *
14 dma_alloc_noncoherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
15                       gfp_t flag)
16 {
17         return dma_alloc_coherent(dev, size, dma_handle, flag);
18 }
19 #define dma_free_coherent       platform_dma_free_coherent
20 static inline void
21 dma_free_noncoherent(struct device *dev, size_t size, void *cpu_addr,
22                      dma_addr_t dma_handle)
23 {
24         dma_free_coherent(dev, size, cpu_addr, dma_handle);
25 }
26 #define dma_map_single          platform_dma_map_single
27 #define dma_map_sg              platform_dma_map_sg
28 #define dma_unmap_single        platform_dma_unmap_single
29 #define dma_unmap_sg            platform_dma_unmap_sg
30 #define dma_sync_single_for_cpu platform_dma_sync_single_for_cpu
31 #define dma_sync_sg_for_cpu     platform_dma_sync_sg_for_cpu
32 #define dma_sync_single_for_device platform_dma_sync_single_for_device
33 #define dma_sync_sg_for_device  platform_dma_sync_sg_for_device
34 #define dma_mapping_error       platform_dma_mapping_error
35
36 #define dma_map_page(dev, pg, off, size, dir)                           \
37         dma_map_single(dev, page_address(pg) + (off), (size), (dir))
38 #define dma_unmap_page(dev, dma_addr, size, dir)                        \
39         dma_unmap_single(dev, dma_addr, size, dir)
40
41 /*
42  * Rest of this file is part of the "Advanced DMA API".  Use at your own risk.
43  * See Documentation/DMA-API.txt for details.
44  */
45
46 #define dma_sync_single_range_for_cpu(dev, dma_handle, offset, size, dir)       \
47         dma_sync_single_for_cpu(dev, dma_handle, size, dir)
48 #define dma_sync_single_range_for_device(dev, dma_handle, offset, size, dir)    \
49         dma_sync_single_for_device(dev, dma_handle, size, dir)
50
51 #define dma_supported           platform_dma_supported
52
53 static inline int
54 dma_set_mask (struct device *dev, u64 mask)
55 {
56         if (!dev->dma_mask || !dma_supported(dev, mask))
57                 return -EIO;
58         *dev->dma_mask = mask;
59         return 0;
60 }
61
62 extern int dma_get_cache_alignment(void);
63
64 static inline void
65 dma_cache_sync (struct device *dev, void *vaddr, size_t size,
66         enum dma_data_direction dir)
67 {
68         /*
69          * IA-64 is cache-coherent, so this is mostly a no-op.  However, we do need to
70          * ensure that dma_cache_sync() enforces order, hence the mb().
71          */
72         mb();
73 }
74
75 #define dma_is_consistent(d, h) (1)     /* all we do is coherent memory... */
76
77 #endif /* _ASM_IA64_DMA_MAPPING_H */