Could you explain a bit more for understanding how flow-offloading differs from what the OEM firmware did on the lantiq devices? The OEM Firmware uses as far as i know hardware acceleration. I think flow-offloading in kernel 4.14 still dont use the hardware acceleration build in the chipset. Right?
The lantiq hardware has several hardware acceleration units, so far no drivers are available for these. Flow-offloading predominantly speeds up netfilter (the firewall) code in software, while it also allows hooks for offloading flows to the hardware, lantiq doesn't offer these so far (leaving only software flow-offloading for now).