audiohd_dma_t
audiohd_alloc_dma_mem(audiohd_state_t *statep, audiohd_dma_t *pdma,
audiohd_release_dma_mem(audiohd_dma_t *pdma)
static int audiohd_alloc_dma_mem(audiohd_state_t *, audiohd_dma_t *,
audiohd_dma_t hda_dma_corb;
audiohd_dma_t hda_dma_rirb;