netdev - Re: [RFC net-next 0/5] TSN: Add qdisc-based config interfaces for traffic shapers

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Date:   Tue, 12 Sep 2017 06:56:44 +0200
From:   Richard Cochran <richardcochran@...il.com>
To:     Vinicius Costa Gomes <vinicius.gomes@...el.com>
Cc:     Henrik Austad <henrik@...tad.us>, netdev@...r.kernel.org,
        jhs@...atatu.com, xiyou.wangcong@...il.com, jiri@...nulli.us,
        intel-wired-lan@...ts.osuosl.org, andre.guedes@...el.com,
        ivan.briano@...el.com, jesus.sanchez-palencia@...el.com,
        boon.leong.ong@...el.com
Subject: Re: [RFC net-next 0/5] TSN: Add qdisc-based config interfaces for
 traffic shapers

On Thu, Sep 07, 2017 at 06:29:00PM -0700, Vinicius Costa Gomes wrote:
> >>  * Time-aware shaper (802.1Qbv):
> >>
> >>    The idea we are currently exploring is to add a "time-aware", priority based
> >>    qdisc, that also exposes the Tx queues available and provides a mechanism for
> >>    mapping priority <-> traffic class <-> Tx queues in a similar fashion as
> >>    mqprio. We are calling this qdisc 'taprio', and its 'tc' cmd line would be:
> >
> > As far as I know, this is not supported by i210, and if time-aware shaping
> > is enabled in the network - you'll be queued on a bridge until the window
> > opens as time-aware shaping is enforced on the tx-port and not on rx. Is
> > this required in this driver?
> 
> Yeah, i210 doesn't support the time-aware shaper. I think the second
> part of your question doesn't really apply, then.

Actually, you can implement 802.1Qbv (as an end station) quite easily
using the i210.  I'll show how by posting a series after net-next
opens up again.

Thanks,
Richard