Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
[platform/kernel/linux-starfive.git] / include / sound / util_mem.h
1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 #ifndef __SOUND_UTIL_MEM_H
3 #define __SOUND_UTIL_MEM_H
4
5 #include <linux/mutex.h>
6 /*
7  *  Copyright (C) 2000 Takashi Iwai <tiwai@suse.de>
8  *
9  *  Generic memory management routines for soundcard memory allocation
10  */
11
12 /*
13  * memory block
14  */
15 struct snd_util_memblk {
16         unsigned int size;              /* size of this block */
17         unsigned int offset;            /* zero-offset of this block */
18         struct list_head list;          /* link */
19 };
20
21 #define snd_util_memblk_argptr(blk)     (void*)((char*)(blk) + sizeof(struct snd_util_memblk))
22
23 /*
24  * memory management information
25  */
26 struct snd_util_memhdr {
27         unsigned int size;              /* size of whole data */
28         struct list_head block;         /* block linked-list header */
29         int nblocks;                    /* # of allocated blocks */
30         unsigned int used;              /* used memory size */
31         int block_extra_size;           /* extra data size of chunk */
32         struct mutex block_mutex;       /* lock */
33 };
34
35 /*
36  * prototypes
37  */
38 struct snd_util_memhdr *snd_util_memhdr_new(int memsize);
39 void snd_util_memhdr_free(struct snd_util_memhdr *hdr);
40 struct snd_util_memblk *snd_util_mem_alloc(struct snd_util_memhdr *hdr, int size);
41 int snd_util_mem_free(struct snd_util_memhdr *hdr, struct snd_util_memblk *blk);
42 int snd_util_mem_avail(struct snd_util_memhdr *hdr);
43
44 /* functions without mutex */
45 struct snd_util_memblk *__snd_util_mem_alloc(struct snd_util_memhdr *hdr, int size);
46 void __snd_util_mem_free(struct snd_util_memhdr *hdr, struct snd_util_memblk *blk);
47 struct snd_util_memblk *__snd_util_memblk_new(struct snd_util_memhdr *hdr,
48                                               unsigned int units,
49                                               struct list_head *prev);
50
51 #endif /* __SOUND_UTIL_MEM_H */