MLX4_TUN_SET_WRID_QPN
MLX4_TUN_SET_WRID_QPN(tun_qp->proxy_qpt);
wr.wr.wr_id = ((u64) wire_tx_ix) | MLX4_TUN_SET_WRID_QPN(src_qpnum);
wr.wr.wr_id = ((u64) tun_tx_ix) | MLX4_TUN_SET_WRID_QPN(dest_qpt);