linux-kernel - Re: [net-next PATCH v5 0/4] net: renesas: rswitch: R-Car S4 add HW offloading for layer 2 switching

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Message-ID: <20250903165041.20b3c05e@kernel.org>
Date: Wed, 3 Sep 2025 16:50:41 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Michael Dege <michael.dege@...esas.com>
Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>, Niklas
 Söderlund <niklas.soderlund@...natech.se>, Paul Barker
 <paul@...rker.dev>, Andrew Lunn <andrew+netdev@...n.ch>, "David S. Miller"
 <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Paolo Abeni
 <pabeni@...hat.com>, netdev@...r.kernel.org,
 linux-renesas-soc@...r.kernel.org, linux-kernel@...r.kernel.org, Nikita
 Yushchenko <nikita.yoush@...entembedded.com>, Andrew Lunn <andrew@...n.ch>,
 Niklas Söderlund
 <niklas.soderlund+renesas@...natech.se>, Jiri Pirko <jiri@...nulli.us>,
 Ivan Vecera <ivecera@...hat.com>
Subject: Re: [net-next PATCH v5 0/4] net: renesas: rswitch: R-Car S4 add HW
 offloading for layer 2 switching

On Mon, 01 Sep 2025 06:58:04 +0200 Michael Dege wrote:
> The current R-Car S4 rswitch driver only supports port based fowarding.
> This patch set adds HW offloading for L2 switching/bridgeing. The driver
> hooks into switchdev.
> 
> 1. Rename the base driver file to keep the driver name (rswitch.ko)
> 
> 2. Add setting of default MAC ageing time in hardware.
> 
> 3. Add the L2 driver extension in a separate file. The HW offloading
> is automatically configured when a port is added to the bridge device.
> 
> Usage example:
> ip link add name br0 type bridge
> ip link set dev tsn0 master br0
> ip link set dev tsn1 master br0
> ip link set dev br0 up
> ip link set dev tsn0 up
> ip link set dev tsn1 up
> 
> Layer 2 traffic is now fowarded by HW from port TSN0 to port TSN1.
> 
> 4. Provides the functionality to set the MAC table ageing time in the
> Rswitch.

Is anyone with bride offload expertise willing to provide a review here?

Jiri, Ivan, the switchdev MAINTAINERS entry only covers "core" switchdev
which is rather fallow. Is it okay to extend it to driver review?