suse man page for snd_pcm_lib_preallocate_pages

Query: snd_pcm_lib_preallocate_pages

OS: suse

Section: 9

Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar

SND_PCM_LIB_PREALLOC(9) 					   Sound Devices					   SND_PCM_LIB_PREALLOC(9)

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 dependant 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. When substream->dma_buf_id is set, the function tries to look for the reserved buffer, and the buffer is not freed but reserved at destruction time. The dma_buf_id must be unique for all systems (in the same DMA buffer type) e.g. using snd_dma_pci_buf_id. Returns zero if successful, or a negative error code on failure.
COPYRIGHT
Kernel Hackers Manual 2.6. July 2010 SND_PCM_LIB_PREALLOC(9)
Related Man Pages
libssh2_channel_write_ex(3) - centos
ddi_dma_cookie(9s) - sunos
ddi_dma_cookie(9s) - centos
ddi_dma_numwin(9f) - xfree86
ddi_dma_numwin(9f) - posix
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