| snd_pcm_lib_alloc_vmalloc_buffer(9) - phpMan
SND_PCM_LIB_ALLOC_VM(9) PCM API SND_PCM_LIB_ALLOC_VM(9)
NAME
snd_pcm_lib_alloc_vmalloc_buffer - allocate virtual DMA buffer
SYNOPSIS
int snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream * substream, size_t size);
ARGUMENTS
substream
the substream to allocate the buffer to
size
the requested buffer size, in bytes
DESCRIPTION
Allocates the PCM substream buffer using vmalloc, i.e., the memory is contiguous in kernel
virtual space, but not in physical memory. Use this if the buffer is accessed by kernel
code but not by device DMA.
RETURN
1 if the buffer was changed, 0 if not changed, or a negative error code.
COPYRIGHT
Kernel Hackers Manual 4.8. January 2017 SND_PCM_LIB_ALLOC_VM(9)
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