acbvtob
next_acb->queue.scsi_req_baddr = acbvtob(adw, next_acb);
acbvtob(adw, next_acb) + offsetof(struct acb, sense_data);
adw_send_acb(adw, acb, acbvtob(adw, acb));
static __inline u_int32_t acbvtob(struct adw_softc *adw,
adw->commandq->areq_ba = acbvtob(adw, acb);