IRDMA_TCP_OFFSET
irdma_ieq_copy_to_txbuf(buf, txbuf, IRDMA_TCP_OFFSET, 0,
buf->tcph = mem + IRDMA_TCP_OFFSET;
buf->datalen = pkt_len - IRDMA_TCP_OFFSET - buf->tcphlen;
buf->hdrlen = IRDMA_TCP_OFFSET + buf->tcphlen;