From: Jakub Kicinski <jakub.kicin...@netronome.com> Date: Wed, 21 Jun 2017 18:25:02 -0700
> While we discuss the representors.. :) > > This set adds XDP flag for forcing offload and a attachment mode > for reporting to user space that program has been offloaded. The > nfp driver is modified to make use of the new flags, but also to > adhere to the DRV_MODE flag which should disable the HW offload. > > The intended driver behaviour is: > DRV mode offload > no flags yes attempted > DRV_MODE yes no > HW_MODE no yes > > Where 'yes' means required, and error will be returned if setup fails. > 'Attempted' means the offload will only happen automatically if HW is > capable and offloading the program will cause no change in system > behaviour (e.g. maps don't have to bound). > > Thanks to loading the program both to the driver and HW by default we > can fallback to the driver mode without disruption in case user replaces > the program with one which cannot be offloaded later. > > Note that the NFP driver currently claims XDP offload support but > lacks most basic features like direct packet access. > > Only change compared to the RFC is fixing the double bpf_prog_put() > which Daniel has spotted (patch 5). Applied, thank you.
