INIT_HCA_MTT_BASE_OFFSET
MLX4_PUT(inbox, param->mtt_base, INIT_HCA_MTT_BASE_OFFSET);
MLX4_GET(param->mtt_base, outbox, INIT_HCA_MTT_BASE_OFFSET);
MTHCA_PUT(inbox, param->mtt_base, INIT_HCA_MTT_BASE_OFFSET);