TAVOR_QP_WQE_MLX_QP1_HDRS
max_size = (TAVOR_QP_WQE_MLX_QP1_HDRS + (max_sgl << 4));
real_max_sgl = (max_size - TAVOR_QP_WQE_MLX_QP1_HDRS) >> 4;
max_size = (TAVOR_QP_WQE_MLX_QP1_HDRS + (num_sgl << 4));
actual_sgl = ((1 << log2) - TAVOR_QP_WQE_MLX_QP1_HDRS) >> 4;