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)NAMEsnd_pcm_lib_preallocate_pages - pre-allocation for the given DMA typeSYNOPSISint snd_pcm_lib_preallocate_pages(struct snd_pcm_substream * substream, int type, struct device * data, size_t size, size_t max);ARGUMENTSsubstream 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 sizeDESCRIPTIONDo 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.COPYRIGHTKernel Hackers Manual 2.6. July 2010 SND_PCM_LIB_PREALLOC(9)
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