DPDK community: RTE_FLOW support for P4-programmable devices

[Dumitrescu, Cristian]

> > We just set up a community call for next week to discuss in more details the
> > proposal for RTE_FLOW extensions to support P4-programmable devices
> > https://mails.dpdk.org/archives/dev/2023-August/273703.html and look for
> > ways to converge and make progress.
> >
> > All the people from To: and CC: are already invited. To avoid cluttering
> people's
> > calendars, I did not add dev at dpdk.org, so if anybody else wants to attend,
> > please send me a private email and I will be happy to forward the invite.
> >
> > Thanks,
> > Cristian

Attendees: Morten Brorup, Jerin Jacob, Anoob Joseph, Vipin Varghese, Qi Zhang,
Cristian Dumitrescu

1. Ori (RTE_FLOW maintainer) and others were not present, probably on vacation,
hopefully they will be able to attend the next call on this topic. Ferruh had a last
minute conflict that he could not avoid.

2. Cristian presented a few slides (attached) with the problem statement, current
RTE_FLOW gaps for P4-programmable devices and the list of current solution
proposals.

3. Everybody on the call agreed that the P4-programmable devices from Intel,
AMD and others need to be fully supported by DPDK and that there are some
gaps in RTE_FLOW to be fixed for supporting these devices.

3. Ori suggested in a previous email to potentially introduce a registration API
In RTE_FLOW for user-defined flow items and actions. Cristian replied with a 
proposal on the email list and currently wating for Ori's reply (see also proposal
#2 on slide 5).

4. Will setup a follow-up call in early September.

Regards,
Cristian
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