if_gethwtsomaxsegcount
sc->hn_saved_tsosegcnt = if_gethwtsomaxsegcount(ifp);
if (if_gethwtsomaxsegcount(ifp) > if_gethwtsomaxsegcount(vf_ifp))
if_sethwtsomaxsegcount(ifp, if_gethwtsomaxsegcount(vf_ifp));
tsomaxsegcnt = if_gethwtsomaxsegcount(sc->hn_ifp);
if_gethwtsomaxsegcount(ifp), if_gethwtsomaxsegsize(ifp));
u_int if_gethwtsomaxsegcount(const if_t ifp);