Function syevd 

pub unsafe fn syevd(
    handle: &Handle,
    jobz: EigMode,
    uplo: Fill,
    n: i32,
    array_d_a: *mut *mut c_void,
    ia: i32,
    ja: i32,
    desc_a: &MatrixDesc,
    w: *mut c_void,
    data_type_w: cudaDataType,
    compute_type: cudaDataType,
    array_d_work: *mut *mut c_void,
    lwork: i64,
    info: &mut [c_int],
) -> Result<()>

Safety

Same as getrf_buffer_size.