Re: [dpdk-dev] [PATCH v3 0/5] A means to negotiate delivery of Rx meta data

[Thomas Monjalon <thomas@monjalon.net>]

01/10/2021 10:54, Andrew Rybchenko:
> >> Thomas, if I'm not mistaken, net/mlx5 dv_xmeta_en driver option
> >> is vendor-specific way to address the same problem.
> > 
> > Not exactly, it is configuring the capabilities:
> >   +------+-----------+-----------+-------------+-------------+
> >   | Mode | ``MARK``  | ``META``  | ``META`` Tx | FDB/Through |
> >   +======+===========+===========+=============+=============+
> >   | 0    | 24 bits   | 32 bits   | 32 bits     | no          |
> >   +------+-----------+-----------+-------------+-------------+
> >   | 1    | 24 bits   | vary 0-32 | 32 bits     | yes         |
> >   +------+-----------+-----------+-------------+-------------+
> >   | 2    | vary 0-24 | 32 bits   | 32 bits     | yes         |
> >   +------+-----------+-----------+-------------+-------------+
> 
> Sorry, but I don't understand the difference. Negotiate is
> exactly about capabilities which we want to use.

The difference is that dv_xmeta_en is not enabling/disabling
the delivery of mark/meta.
It is just extending the scope (cross-domain) and the size.
I think this is not covered in your proposal.