mps_add_dmaseg
error = mps_add_dmaseg(cm, segs[i].ds_addr, segs[i].ds_len,
mps_add_dmaseg(cm, 0, 0, 0, 1);
int mps_add_dmaseg(struct mps_command *, vm_paddr_t, size_t, u_int, int);