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9#ifndef __SOUND_MEMALLOC_H
10#define __SOUND_MEMALLOC_H
11
12#include <asm/page.h>
13
14struct device;
15
16
17
18
19struct snd_dma_device {
20 int type;
21 struct device *dev;
22};
23
24#define snd_dma_pci_data(pci) (&(pci)->dev)
25#define snd_dma_continuous_data(x) ((struct device *)(__force unsigned long)(x))
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29
30
31#define SNDRV_DMA_TYPE_UNKNOWN 0
32#define SNDRV_DMA_TYPE_CONTINUOUS 1
33#define SNDRV_DMA_TYPE_DEV 2
34#define SNDRV_DMA_TYPE_DEV_UC 5
35#ifdef CONFIG_SND_DMA_SGBUF
36#define SNDRV_DMA_TYPE_DEV_SG 3
37#define SNDRV_DMA_TYPE_DEV_UC_SG 6
38#else
39#define SNDRV_DMA_TYPE_DEV_SG SNDRV_DMA_TYPE_DEV
40#define SNDRV_DMA_TYPE_DEV_UC_SG SNDRV_DMA_TYPE_DEV_UC
41#endif
42#ifdef CONFIG_GENERIC_ALLOCATOR
43#define SNDRV_DMA_TYPE_DEV_IRAM 4
44#else
45#define SNDRV_DMA_TYPE_DEV_IRAM SNDRV_DMA_TYPE_DEV
46#endif
47
48
49
50
51struct snd_dma_buffer {
52 struct snd_dma_device dev;
53 unsigned char *area;
54 dma_addr_t addr;
55 size_t bytes;
56 void *private_data;
57};
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59
60
61
62static inline unsigned int snd_sgbuf_aligned_pages(size_t size)
63{
64 return (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
65}
66
67#ifdef CONFIG_SND_DMA_SGBUF
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69
70
71void *snd_malloc_sgbuf_pages(struct device *device,
72 size_t size, struct snd_dma_buffer *dmab,
73 size_t *res_size);
74int snd_free_sgbuf_pages(struct snd_dma_buffer *dmab);
75
76struct snd_sg_page {
77 void *buf;
78 dma_addr_t addr;
79};
80
81struct snd_sg_buf {
82 int size;
83 int pages;
84 int tblsize;
85 struct snd_sg_page *table;
86 struct page **page_table;
87 struct device *dev;
88};
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92
93static inline dma_addr_t snd_sgbuf_get_addr(struct snd_dma_buffer *dmab,
94 size_t offset)
95{
96 struct snd_sg_buf *sgbuf = dmab->private_data;
97 dma_addr_t addr = sgbuf->table[offset >> PAGE_SHIFT].addr;
98 addr &= ~((dma_addr_t)PAGE_SIZE - 1);
99 return addr + offset % PAGE_SIZE;
100}
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103
104
105static inline void *snd_sgbuf_get_ptr(struct snd_dma_buffer *dmab,
106 size_t offset)
107{
108 struct snd_sg_buf *sgbuf = dmab->private_data;
109 return sgbuf->table[offset >> PAGE_SHIFT].buf + offset % PAGE_SIZE;
110}
111
112unsigned int snd_sgbuf_get_chunk_size(struct snd_dma_buffer *dmab,
113 unsigned int ofs, unsigned int size);
114#else
115
116static inline dma_addr_t snd_sgbuf_get_addr(struct snd_dma_buffer *dmab,
117 size_t offset)
118{
119 return dmab->addr + offset;
120}
121
122static inline void *snd_sgbuf_get_ptr(struct snd_dma_buffer *dmab,
123 size_t offset)
124{
125 return dmab->area + offset;
126}
127
128#define snd_sgbuf_get_chunk_size(dmab, ofs, size) (size)
129
130#endif
131
132
133int snd_dma_alloc_pages(int type, struct device *dev, size_t size,
134 struct snd_dma_buffer *dmab);
135int snd_dma_alloc_pages_fallback(int type, struct device *dev, size_t size,
136 struct snd_dma_buffer *dmab);
137void snd_dma_free_pages(struct snd_dma_buffer *dmab);
138
139#endif
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141