netdev - Re: mv88e6xxx assisted learning on CPU port

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Message-ID: <20230122131058.n4b2jejecksane3j@skbuf>
Date:   Sun, 22 Jan 2023 15:10:58 +0200
From:   Vladimir Oltean <olteanv@...il.com>
To:     Aaron Thompson <dev@...ont.org>
Cc:     Tobias Waldekranz <tobias@...dekranz.com>, netdev@...r.kernel.org
Subject: Re: mv88e6xxx assisted learning on CPU port

On Sun, Jan 22, 2023 at 04:15:08AM +0000, Aaron Thompson wrote:
> Hi Tobias, Vladimir, et al.,
> 
> Just a quick question: Is there a reason why the patch to enable
> assisted_learning_on_cpu_port for mv88e6xxx never made it to mainline? It
> was included in this RFC series:
> 
> https://lore.kernel.org/all/20210224114350.2791260-14-olteanv@gmail.com/
> 
> But not in the series that eventually made it to mainline. In my searching
> on lore, I haven't been able to find anything else about it, yea or nay.
> 
> Thanks,
> -- Aaron

Because since commit ce5df6894a57 ("net: dsa: mv88e6xxx: map virtual
bridges with forwarding offload in the PVT"), the mv88e6xxx driver
supports a more potent feature (bridge TX forwarding offload), which
sends packets from software to the switch in a way in which the switch
can automatically learn their MAC SA + VLAN ID, among other benefits.
More details can be found here:
https://www.kernel.org/doc/html/latest/networking/dsa/dsa.html#bridge-layer