Symbol: IB_GRH_TCLASS_MASK
usr/src/uts/common/io/ib/ibtl/ibtl_chan.c
1246
adds_vect.av_tclass = (ver_tc_flow & IB_GRH_TCLASS_MASK) >> 20;
usr/src/uts/common/io/ib/mgt/ibmf/ibmf_recv.c
898
(tmp32 & IB_GRH_TCLASS_MASK) >> 20;