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24#ifndef __SOUND_MEMALLOC_H
25#define __SOUND_MEMALLOC_H
26
27struct device;
28
29
30
31
32struct snd_dma_device {
33 int type;
34 struct device *dev;
35};
36
37#ifndef snd_dma_pci_data
38#define snd_dma_pci_data(pci) (&(pci)->dev)
39#define snd_dma_isa_data() NULL
40#define snd_dma_continuous_data(x) ((struct device *)(__force unsigned long)(x))
41#endif
42
43
44
45
46
47#define SNDRV_DMA_TYPE_UNKNOWN 0
48#define SNDRV_DMA_TYPE_CONTINUOUS 1
49#define SNDRV_DMA_TYPE_DEV 2
50#ifdef CONFIG_SND_DMA_SGBUF
51#define SNDRV_DMA_TYPE_DEV_SG 3
52#else
53#define SNDRV_DMA_TYPE_DEV_SG SNDRV_DMA_TYPE_DEV
54#endif
55
56
57
58
59struct snd_dma_buffer {
60 struct snd_dma_device dev;
61 unsigned char *area;
62 dma_addr_t addr;
63 size_t bytes;
64 void *private_data;
65};
66
67#ifdef CONFIG_SND_DMA_SGBUF
68
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};
89
90
91
92
93static inline unsigned int snd_sgbuf_aligned_pages(size_t size)
94{
95 return (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
96}
97
98
99
100
101static inline dma_addr_t snd_sgbuf_get_addr(struct snd_dma_buffer *dmab,
102 size_t offset)
103{
104 struct snd_sg_buf *sgbuf = dmab->private_data;
105 dma_addr_t addr = sgbuf->table[offset >> PAGE_SHIFT].addr;
106 addr &= PAGE_MASK;
107 return addr + offset % PAGE_SIZE;
108}
109
110
111
112
113static inline void *snd_sgbuf_get_ptr(struct snd_dma_buffer *dmab,
114 size_t offset)
115{
116 struct snd_sg_buf *sgbuf = dmab->private_data;
117 return sgbuf->table[offset >> PAGE_SHIFT].buf + offset % PAGE_SIZE;
118}
119
120unsigned int snd_sgbuf_get_chunk_size(struct snd_dma_buffer *dmab,
121 unsigned int ofs, unsigned int size);
122#else
123
124static inline dma_addr_t snd_sgbuf_get_addr(struct snd_dma_buffer *dmab,
125 size_t offset)
126{
127 return dmab->addr + offset;
128}
129
130static inline void *snd_sgbuf_get_ptr(struct snd_dma_buffer *dmab,
131 size_t offset)
132{
133 return dmab->area + offset;
134}
135
136#define snd_sgbuf_get_chunk_size(dmab, ofs, size) (size)
137
138#endif
139
140
141int snd_dma_alloc_pages(int type, struct device *dev, size_t size,
142 struct snd_dma_buffer *dmab);
143int snd_dma_alloc_pages_fallback(int type, struct device *dev, size_t size,
144 struct snd_dma_buffer *dmab);
145void snd_dma_free_pages(struct snd_dma_buffer *dmab);
146
147
148
149#define snd_dma_pci_buf_id(pci) (((unsigned int)(pci)->vendor << 16) | (pci)->device)
150
151size_t snd_dma_get_reserved_buf(struct snd_dma_buffer *dmab, unsigned int id);
152int snd_dma_reserve_buf(struct snd_dma_buffer *dmab, unsigned int id);
153
154
155void *snd_malloc_pages(size_t size, gfp_t gfp_flags);
156void snd_free_pages(void *ptr, size_t size);
157
158#endif
159
160