bd_alloc_handle
ns->ns_bd_hdl = bd_alloc_handle(ns, &ops, &nvme->n_prp_dma_attr,
slot->s_bdh = bd_alloc_handle(slot, &sda_bd_ops, h->h_dma, KM_SLEEP);
skdev->s_bdh = bd_alloc_handle(skdev, &skd_bd_ops,
vib->vib_bd_h = bd_alloc_handle(vib, &vioblk_bd_ops,
bd_handle_t bd_alloc_handle(void *, bd_ops_t *, ddi_dma_attr_t *, int);