AL_ETH_DEFAULT_TX_SW_DESCS
adapter->tx_ring_count = AL_ETH_DEFAULT_TX_SW_DESCS;
#define AL_ETH_TX_RING_IDX_NEXT(tx_ring, idx) (((idx) + 1) & (AL_ETH_DEFAULT_TX_SW_DESCS - 1))
#if ((AL_ETH_DEFAULT_TX_SW_DESCS / 4) < (AL_ETH_PKT_MAX_BUFS + 2))
#define AL_ETH_TX_WAKEUP_THRESH (AL_ETH_DEFAULT_TX_SW_DESCS / 4)