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git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - include/sound/memalloc.h
1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4 * Takashi Iwai <tiwai@suse.de>
6 * Generic memory allocators
9 #ifndef __SOUND_MEMALLOC_H
10 #define __SOUND_MEMALLOC_H
15 struct vm_area_struct
;
20 struct snd_dma_device
{
21 int type
; /* SNDRV_DMA_TYPE_XXX */
22 struct device
*dev
; /* generic device */
25 #define snd_dma_continuous_data(x) ((struct device *)(__force unsigned long)(x))
31 #define SNDRV_DMA_TYPE_UNKNOWN 0 /* not defined */
32 #define SNDRV_DMA_TYPE_CONTINUOUS 1 /* continuous no-DMA memory */
33 #define SNDRV_DMA_TYPE_DEV 2 /* generic device continuous */
34 #define SNDRV_DMA_TYPE_DEV_WC 5 /* continuous write-combined */
35 #ifdef CONFIG_SND_DMA_SGBUF
36 #define SNDRV_DMA_TYPE_DEV_SG 3 /* generic device SG-buffer */
37 #define SNDRV_DMA_TYPE_DEV_WC_SG 6 /* SG write-combined */
39 #define SNDRV_DMA_TYPE_DEV_SG SNDRV_DMA_TYPE_DEV /* no SG-buf support */
40 #define SNDRV_DMA_TYPE_DEV_WC_SG SNDRV_DMA_TYPE_DEV_WC
42 #ifdef CONFIG_GENERIC_ALLOCATOR
43 #define SNDRV_DMA_TYPE_DEV_IRAM 4 /* generic device iram-buffer */
45 #define SNDRV_DMA_TYPE_DEV_IRAM SNDRV_DMA_TYPE_DEV
47 #define SNDRV_DMA_TYPE_VMALLOC 7 /* vmalloc'ed buffer */
50 * info for buffer allocation
52 struct snd_dma_buffer
{
53 struct snd_dma_device dev
; /* device type */
54 unsigned char *area
; /* virtual pointer */
55 dma_addr_t addr
; /* physical address */
56 size_t bytes
; /* buffer size in bytes */
57 void *private_data
; /* private for allocator; don't touch */
61 * return the pages matching with the given byte size
63 static inline unsigned int snd_sgbuf_aligned_pages(size_t size
)
65 return (size
+ PAGE_SIZE
- 1) >> PAGE_SHIFT
;
68 /* allocate/release a buffer */
69 int snd_dma_alloc_pages(int type
, struct device
*dev
, size_t size
,
70 struct snd_dma_buffer
*dmab
);
71 int snd_dma_alloc_pages_fallback(int type
, struct device
*dev
, size_t size
,
72 struct snd_dma_buffer
*dmab
);
73 void snd_dma_free_pages(struct snd_dma_buffer
*dmab
);
74 int snd_dma_buffer_mmap(struct snd_dma_buffer
*dmab
,
75 struct vm_area_struct
*area
);
77 dma_addr_t
snd_sgbuf_get_addr(struct snd_dma_buffer
*dmab
, size_t offset
);
78 struct page
*snd_sgbuf_get_page(struct snd_dma_buffer
*dmab
, size_t offset
);
79 unsigned int snd_sgbuf_get_chunk_size(struct snd_dma_buffer
*dmab
,
80 unsigned int ofs
, unsigned int size
);
82 /* device-managed memory allocator */
83 struct snd_dma_buffer
*snd_devm_alloc_pages(struct device
*dev
, int type
,
86 #endif /* __SOUND_MEMALLOC_H */