TLanList
struct TLanList tx_ring[TLAN_NUM_TX_LISTS];
struct TLanList rx_ring[TLAN_NUM_RX_LISTS];
struct TLanList *rx_head_desc;
struct TLanList *txList;
struct TLanList *rxList;
struct TLanList *list;
struct TLanList *tail_list;
struct TLanList *head_list;