snd_pcm_lib_preallocate_pages (9) - Linux Manuals

snd_pcm_lib_preallocate_pages: pre-allocation for the given DMA type

NAME

snd_pcm_lib_preallocate_pages - pre-allocation for the given DMA type

SYNOPSIS

int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream * substream, int type, struct device * data, size_t size, size_t max);

ARGUMENTS

substream

the pcm substream instance

type

DMA type (SNDRV_DMA_TYPE_*)

data

DMA type dependent data

size

the requested pre-allocation size in bytes

max

the max. allowed pre-allocation size

DESCRIPTION

Do pre-allocation for the given DMA buffer type.

RETURN

Zero if successful, or a negative error code on failure.

COPYRIGHT