GLC_MAX_TX_PACKETS
for (i = 0; i < GLC_MAX_TX_PACKETS; i++) {
if_setsendqlen(sc->sc_ifp, GLC_MAX_TX_PACKETS);
((idx + 1) % GLC_MAX_TX_PACKETS)*sizeof(struct glc_dmadesc);
idx = (idx + 1) % GLC_MAX_TX_PACKETS;
idx = GLC_MAX_TX_PACKETS - 1;
struct glc_txsoft sc_txsoft[GLC_MAX_TX_PACKETS];