eth_rx_sge
fp->rx_sge_chain = (struct eth_rx_sge *)fp->rx_sge_dma.vaddr;
struct eth_rx_sge *rx_sge =
struct eth_rx_sge *sge;
#define RX_SGE_TOTAL_PER_PAGE (BCM_PAGE_SIZE / sizeof(struct eth_rx_sge))
struct eth_rx_sge *rx_sge_chain;
(0xFFFF - ((PAGE_SIZE/((STRUCT_SIZE(eth_rx_sge))/8))-1))
#define U_ETH_SGES_PER_PAGE (PAGE_SIZE/(STRUCT_SIZE(eth_rx_sge)/8))