Function rdmaxcel_efa_connect 

pub unsafe extern "C" fn rdmaxcel_efa_connect(
    qp: *mut rdmaxcel_qp_t,
    port_num: u8,
    pkey_index: u16,
    qkey: u32,
    psn: u32,
    gid_index: u8,
    remote_gid: *const u8,
    remote_qpn: u32,
) -> c_int

EFA connect: INIT->RTR->RTS + AH creation, stored directly in qp struct