[PATCH net-next v5] net: airoha: add HW GRO offload support

[Jakub Kicinski]

On Thu, 3 Sep 2026 17:45:50 +0200 Lorenzo Bianconi wrote:
> > Lacking more details from the vendor, I think you need to use a
> > pktdrill-like sender, explicitly sets the segment lengths to some not
> > mergeable (like, i.e. 200-300-400) but otherwise fitting a GRO packet
> > (i.e. same hdr except for the sequence number and push flag allowed only
> > in the last packet), ensure that the aggregation timeout lasts long
> > enough to receive all of them, and check if the engine really aggregates
> > them or not.  
> 
> I think in the example you pointed out (length 200,300,400) the hw engine will
> create a single TCP packet composed by 3 segments (with gso_size = 300) while
> sw GRO will just push sigle skbs. I agree this is just a GRO approximation.
> If it is not enough I am fine to switch back to LRO implementation.

FWIW the gro.py test covers that and many more cases..