MLX5_UN_SZ_DW
u32 out[MLX5_ST_SZ_DW(mcqi_reg) + MLX5_UN_SZ_DW(mcqi_reg_data)] = {};
u32 cur[MLX5_UN_SZ_DW(hca_cap_union)];
u32 max[MLX5_UN_SZ_DW(hca_cap_union)];