MYRI10GE_LOWPART_TO_U32
dma->low = htonl(MYRI10GE_LOWPART_TO_U32(cookie.dmac_laddress));
low = MYRI10GE_LOWPART_TO_U32(cookie.dmac_laddress);
start = MYRI10GE_LOWPART_TO_U32(cookie.dmac_laddress);
htonl(MYRI10GE_LOWPART_TO_U32(cookie.dmac_laddress));