typhoon_num_free
if (netif_queue_stopped(tp->dev) && typhoon_num_free(txRing->lastWrite,
return typhoon_num_free(lastWrite, cmdCleared, COMMAND_ENTRIES);
return typhoon_num_free(respReady, respCleared, RESPONSE_ENTRIES);
return typhoon_num_free(ring->lastWrite, ring->lastRead, TXLO_ENTRIES);