Re: [dpdk-dev] i40e SR-IOV with Linux PF

[Thomas Monjalon <thomas.monjalon@6wind.com>]

2017-03-14 04:44, Wu, Jingjing:
> From: Thomas Monjalon [mailto:thomas.monjalon@6wind.com]
> > > Hi i40e developers,
> > >
> > > Referring to the VFD discussion, I thought basic behaviours were the
> > > same regardless of the PF driver:
> > > http://dpdk.org/ml/archives/dev/2016-December/053056.html
> > > "
> > > > In the meanwhile, we have some test models ongoing to validate
> > > > combination of Linux and DPDK drivers for VF and PF.
> > > > We'll fully support below 4 cases going forward.
> > > > 1. DPDK PF + DPDK VF
> > > > 2. DPDK PF + Linux VF
> > > > 3. Linux PF + DPDK VF
> > > > 4. Linux PF + Linux VF (it's not our scope)
> > > [...]
> > > > Linux PF + DPDK VF has been tested with 1.0 API long time ago.
> > > > There is some test activities ongoing.
> > > "
> > >
> > > I think the Linux PF case is important and deserves more consideration.
> > > When looking at the code, specifically i40evf_vlan_offload_set() and
> > > i40evf_vlan_pvid_set(), I read this:
> > > "
> > >     /* Linux pf host doesn't support vlan offload yet */
> > >     if (vf->version_major == I40E_DPDK_VERSION_MAJOR) { "
> > >
> > > Is there some work in progress on Linux side to get the same behaviour
> > > as with a DPDK PF?
> > >
> 
> As I know, VFD features are marked with an "EXPERIMENTAL" tag.
> And we are working on the extendable interface (feature based) with
> PF kernel driver. 

The VLAN offload is not a VFD feature. It is a basic driver feature.
It is said that it is supported in the documentation but it is not
with a Linux PF.

Please consider the rest of my email:

> > At least, it must be documented in
> >       doc/guides/nics/features/i40e_vf.ini
> > and marked as partially supported (P instead of Y) in
> >       doc/guides/nics/i40e.rst