nfp_cpp_area_read
int nfp_cpp_area_read(struct nfp_cpp_area *area, unsigned long offset,
n = nfp_cpp_area_read(area, offset, &tmp, sizeof(tmp));
n = nfp_cpp_area_read(area, offset, &tmp, sizeof(tmp));
err = nfp_cpp_area_read(area, offset, kernel_vaddr, length);