linux-kernel - Re: [PATCH net-next v6 0/9] Enhanced DCB and DSCP Support for KSZ Switches

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Date: Thu, 11 Apr 2024 02:18:49 +0300
From: Vladimir Oltean <olteanv@...il.com>
To: Oleksij Rempel <o.rempel@...gutronix.de>
Cc: "David S. Miller" <davem@...emloft.net>, Andrew Lunn <andrew@...n.ch>,
	Eric Dumazet <edumazet@...gle.com>,
	Florian Fainelli <f.fainelli@...il.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Woojung Huh <woojung.huh@...rochip.com>,
	Arun Ramadoss <arun.ramadoss@...rochip.com>, kernel@...gutronix.de,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	UNGLinuxDriver@...rochip.com, David Ahern <dsahern@...nel.org>,
	Simon Horman <horms@...nel.org>,
	Willem de Bruijn <willemb@...gle.com>,
	Søren Andersen <san@...v.dk>
Subject: Re: [PATCH net-next v6 0/9] Enhanced DCB and DSCP Support for KSZ
 Switches

On Wed, Apr 10, 2024 at 10:05:47AM +0200, Oleksij Rempel wrote:
> This patch series is aimed at improving support for DCB (Data Center
> Bridging) and DSCP (Differentiated Services Code Point) on KSZ switches.
> 
> The main goal is to introduce global DSCP and PCP (Priority Code Point)
> mapping support, addressing the limitation of KSZ switches not having
> per-port DSCP priority mapping. This involves extending the DSA
> framework with new callbacks for managing trust settings for global DSCP
> and PCP maps. Additionally, we introduce IEEE 802.1q helpers for default
> configurations, benefiting other drivers too.
> 
> Change logs are in separate patches.

In whichever way this goes, could we also see a selftest in future patch
revisions (similar to tools/testing/selftests/drivers/net/ocelot/basic_qos.sh),
which (beyond the basic task of proving that it works) sets straight the
basic user expectations of _what_ works and can be done in terms of QoS
classification on these switches?