netdev - RE: [PATCH v2 net-next 0/7] dpaa2-eth: add support for Rx traffic classes

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Message-ID: <VI1PR0402MB387176400D9ED1670801A474E08F0@VI1PR0402MB3871.eurprd04.prod.outlook.com>
Date:   Fri, 29 May 2020 11:45:08 +0000
From:   Ioana Ciornei <ioana.ciornei@....com>
To:     Jakub Kicinski <kuba@...nel.org>
CC:     "davem@...emloft.net" <davem@...emloft.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: [PATCH v2 net-next 0/7] dpaa2-eth: add support for Rx traffic
 classes

> Subject: Re: [PATCH v2 net-next 0/7] dpaa2-eth: add support for Rx traffic
> classes
> 
> On Sat, 16 May 2020 08:16:47 +0000 Ioana Ciornei wrote:
> > > With the Rx QoS features users won't even be able to tell via
> > > standard Linux interfaces what the config was.
> >
> > Ok, that is true. So how should this information be exported to the user?
> 
> I believe no such interface currently exists.

Somehow I missed this the first time around but the number of Rx traffic classes
can be exported through the DCB ops if those traffic classes are PFC enabled.
Also, adding PFC support was the main target of this patch set.

An output like the following would convey to the user how many traffic classes
are available and which of them are PFC enabled.

root@...alhost:~# lldptool -t -i eth1 -V PFC
IEEE 8021QAZ PFC TLV
         Willing: yes
         MACsec Bypass Capable: no
         PFC capable traffic classes: 8
         PFC enabled: 1 3 7

Ioana