pvscsi_dma_buf_t
pvscsi_dma_buf_t db;
pvscsi_dma_buf_t *buf)
pvscsi_free_dma_buffer(pvscsi_dma_buf_t *buf)
pvscsi_dma_buf_t state_buf;
pvscsi_dma_buf_t req_ring_buf;
pvscsi_dma_buf_t cmp_ring_buf;
pvscsi_dma_buf_t msg_ring_buf;