Commit | Line | Data |
---|---|---|
1a59d1b8 | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
1da177e4 | 2 | /* |
c1017a4c | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
4 | * Takashi Iwai <tiwai@suse.de> |
5 | * | |
6 | * Generic memory allocators | |
1da177e4 LT |
7 | */ |
8 | ||
9 | #ifndef __SOUND_MEMALLOC_H | |
10 | #define __SOUND_MEMALLOC_H | |
11 | ||
345a9ca3 TI |
12 | #include <asm/page.h> |
13 | ||
1da177e4 LT |
14 | struct device; |
15 | ||
16 | /* | |
17 | * buffer device info | |
18 | */ | |
19 | struct snd_dma_device { | |
20 | int type; /* SNDRV_DMA_TYPE_XXX */ | |
21 | struct device *dev; /* generic device */ | |
22 | }; | |
23 | ||
019d80db | 24 | #define snd_dma_continuous_data(x) ((struct device *)(__force unsigned long)(x)) |
1da177e4 LT |
25 | |
26 | ||
27 | /* | |
28 | * buffer types | |
29 | */ | |
30 | #define SNDRV_DMA_TYPE_UNKNOWN 0 /* not defined */ | |
31 | #define SNDRV_DMA_TYPE_CONTINUOUS 1 /* continuous no-DMA memory */ | |
32 | #define SNDRV_DMA_TYPE_DEV 2 /* generic device continuous */ | |
42e748a0 | 33 | #define SNDRV_DMA_TYPE_DEV_UC 5 /* continuous non-cahced */ |
cc6a8acd | 34 | #ifdef CONFIG_SND_DMA_SGBUF |
1da177e4 | 35 | #define SNDRV_DMA_TYPE_DEV_SG 3 /* generic device SG-buffer */ |
42e748a0 | 36 | #define SNDRV_DMA_TYPE_DEV_UC_SG 6 /* SG non-cached */ |
cc6a8acd TI |
37 | #else |
38 | #define SNDRV_DMA_TYPE_DEV_SG SNDRV_DMA_TYPE_DEV /* no SG-buf support */ | |
42e748a0 | 39 | #define SNDRV_DMA_TYPE_DEV_UC_SG SNDRV_DMA_TYPE_DEV_UC |
cc6a8acd | 40 | #endif |
a5606f85 | 41 | #ifdef CONFIG_GENERIC_ALLOCATOR |
05503214 | 42 | #define SNDRV_DMA_TYPE_DEV_IRAM 4 /* generic device iram-buffer */ |
a5606f85 TI |
43 | #else |
44 | #define SNDRV_DMA_TYPE_DEV_IRAM SNDRV_DMA_TYPE_DEV | |
45 | #endif | |
1fe7f397 | 46 | #define SNDRV_DMA_TYPE_VMALLOC 7 /* vmalloc'ed buffer */ |
1da177e4 LT |
47 | |
48 | /* | |
49 | * info for buffer allocation | |
50 | */ | |
51 | struct snd_dma_buffer { | |
52 | struct snd_dma_device dev; /* device type */ | |
53 | unsigned char *area; /* virtual pointer */ | |
54 | dma_addr_t addr; /* physical address */ | |
55 | size_t bytes; /* buffer size in bytes */ | |
56 | void *private_data; /* private for allocator; don't touch */ | |
57 | }; | |
58 | ||
4cae99d9 PLB |
59 | /* |
60 | * return the pages matching with the given byte size | |
61 | */ | |
62 | static inline unsigned int snd_sgbuf_aligned_pages(size_t size) | |
63 | { | |
64 | return (size + PAGE_SIZE - 1) >> PAGE_SHIFT; | |
65 | } | |
66 | ||
cc6a8acd | 67 | #ifdef CONFIG_SND_DMA_SGBUF |
1da177e4 LT |
68 | /* |
69 | * Scatter-Gather generic device pages | |
70 | */ | |
77a23f26 TI |
71 | void *snd_malloc_sgbuf_pages(struct device *device, |
72 | size_t size, struct snd_dma_buffer *dmab, | |
73 | size_t *res_size); | |
74 | int snd_free_sgbuf_pages(struct snd_dma_buffer *dmab); | |
75 | ||
1da177e4 LT |
76 | struct snd_sg_page { |
77 | void *buf; | |
78 | dma_addr_t addr; | |
79 | }; | |
80 | ||
81 | struct snd_sg_buf { | |
82 | int size; /* allocated byte size */ | |
83 | int pages; /* allocated pages */ | |
84 | int tblsize; /* allocated table size */ | |
85 | struct snd_sg_page *table; /* address table */ | |
86 | struct page **page_table; /* page table (for vmap/vunmap) */ | |
87 | struct device *dev; | |
88 | }; | |
89 | ||
1da177e4 LT |
90 | /* |
91 | * return the physical address at the corresponding offset | |
92 | */ | |
9d069dc0 TI |
93 | static inline dma_addr_t snd_sgbuf_get_addr(struct snd_dma_buffer *dmab, |
94 | size_t offset) | |
1da177e4 | 95 | { |
9d069dc0 | 96 | struct snd_sg_buf *sgbuf = dmab->private_data; |
51e9f2e6 | 97 | dma_addr_t addr = sgbuf->table[offset >> PAGE_SHIFT].addr; |
932e9dec | 98 | addr &= ~((dma_addr_t)PAGE_SIZE - 1); |
51e9f2e6 | 99 | return addr + offset % PAGE_SIZE; |
1da177e4 LT |
100 | } |
101 | ||
77a23f26 TI |
102 | /* |
103 | * return the virtual address at the corresponding offset | |
104 | */ | |
9d069dc0 TI |
105 | static inline void *snd_sgbuf_get_ptr(struct snd_dma_buffer *dmab, |
106 | size_t offset) | |
77a23f26 | 107 | { |
9d069dc0 | 108 | struct snd_sg_buf *sgbuf = dmab->private_data; |
77a23f26 TI |
109 | return sgbuf->table[offset >> PAGE_SHIFT].buf + offset % PAGE_SIZE; |
110 | } | |
9d069dc0 TI |
111 | |
112 | unsigned int snd_sgbuf_get_chunk_size(struct snd_dma_buffer *dmab, | |
113 | unsigned int ofs, unsigned int size); | |
114 | #else | |
115 | /* non-SG versions */ | |
116 | static 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 | ||
122 | static 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 | ||
cc6a8acd | 130 | #endif /* CONFIG_SND_DMA_SGBUF */ |
1da177e4 LT |
131 | |
132 | /* allocate/release a buffer */ | |
133 | int snd_dma_alloc_pages(int type, struct device *dev, size_t size, | |
134 | struct snd_dma_buffer *dmab); | |
135 | int snd_dma_alloc_pages_fallback(int type, struct device *dev, size_t size, | |
136 | struct snd_dma_buffer *dmab); | |
137 | void snd_dma_free_pages(struct snd_dma_buffer *dmab); | |
138 | ||
1da177e4 LT |
139 | #endif /* __SOUND_MEMALLOC_H */ |
140 |