PVRDMA_QP_NUM_HEADER_PAGES
qp->npages_send = PVRDMA_QP_NUM_HEADER_PAGES +
qp->sq.offset = PVRDMA_QP_NUM_HEADER_PAGES * PAGE_SIZE;
cmd->send_chunks = qp->npages_send - PVRDMA_QP_NUM_HEADER_PAGES;