1 void devdma_hw_free(struct device
*dev
, struct snd_pcm_substream
*substream
);
2 int devdma_hw_alloc(struct device
*dev
, struct snd_pcm_substream
*substream
, size_t size
);
3 int devdma_mmap(struct device
*dev
, struct snd_pcm_substream
*substream
, struct vm_area_struct
*vma
);
