eth_tx_start_bd
IN struct eth_tx_start_bd *start_bd,
struct eth_tx_start_bd *start_bd = NULL;
IN struct eth_tx_start_bd *start_bd,
start_bd = (struct eth_tx_start_bd *)lm_bd_chain_produce_bd(&tx_chain->bd_chain);
ASSERT_STATIC(OFFSETOF(struct eth_tx_bd, nbytes) == OFFSETOF(struct eth_tx_start_bd, nbytes)) ;
struct eth_tx_start_bd start_bd /* the first bd in a packets */;