HPC3_HDD_CTL_EOCHAIN
hva->hpc3_hdd_ctl = HPC3_HDD_CTL_EOCHAIN;
sc->sc_rxdesc[new_end].hpc3_hdd_ctl |= HPC3_HDD_CTL_EOCHAIN;
sc->sc_rxdesc[orig_end].hpc3_hdd_ctl &= ~HPC3_HDD_CTL_EOCHAIN;
HPC3_HDD_CTL_INTR | HPC3_HDD_CTL_EOCHAIN;
~HPC3_HDD_CTL_EOCHAIN;
((x) == (SQ_NRXDESC - 1) ? HPC3_HDD_CTL_EOCHAIN : 0);