Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0-or-later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) #ifndef __SOUND_UTIL_MEM_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #define __SOUND_UTIL_MEM_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  *  Copyright (C) 2000 Takashi Iwai <tiwai@suse.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  *  Generic memory management routines for soundcard memory allocation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)  * memory block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) struct snd_util_memblk {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	unsigned int size;		/* size of this block */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	unsigned int offset;		/* zero-offset of this block */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	struct list_head list;		/* link */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define snd_util_memblk_argptr(blk)	(void*)((char*)(blk) + sizeof(struct snd_util_memblk))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)  * memory management information
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) struct snd_util_memhdr {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	unsigned int size;		/* size of whole data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	struct list_head block;		/* block linked-list header */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	int nblocks;			/* # of allocated blocks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	unsigned int used;		/* used memory size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	int block_extra_size;		/* extra data size of chunk */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	struct mutex block_mutex;	/* lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)  * prototypes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) struct snd_util_memhdr *snd_util_memhdr_new(int memsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) void snd_util_memhdr_free(struct snd_util_memhdr *hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) struct snd_util_memblk *snd_util_mem_alloc(struct snd_util_memhdr *hdr, int size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) int snd_util_mem_free(struct snd_util_memhdr *hdr, struct snd_util_memblk *blk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) int snd_util_mem_avail(struct snd_util_memhdr *hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) /* functions without mutex */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) struct snd_util_memblk *__snd_util_mem_alloc(struct snd_util_memhdr *hdr, int size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) void __snd_util_mem_free(struct snd_util_memhdr *hdr, struct snd_util_memblk *blk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) struct snd_util_memblk *__snd_util_memblk_new(struct snd_util_memhdr *hdr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 					      unsigned int units,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 					      struct list_head *prev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #endif /* __SOUND_UTIL_MEM_H */