REAL_RX_BUF_SIZE
static unsigned char txb[NR_TX_DESC * REAL_RX_BUF_SIZE];
static unsigned char rxb[NR_RX_DESC * REAL_RX_BUF_SIZE]
virt_to_le32desc(&rxb[i * REAL_RX_BUF_SIZE]);
rx_ring[i].cmdsts = cpu_to_le32(REAL_RX_BUF_SIZE);
rx_ring[i].cmdsts = cpu_to_le32(REAL_RX_BUF_SIZE);
rxb + (entry * REAL_RX_BUF_SIZE),