linux-kernel - Re: [PATCH v2 3/4] net: renesas: rswitch: add offloading for L2 switching

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Message-ID: <49f58ebc-04cd-469a-9dcb-6a2a7e0ff0f7@lunn.ch>
Date: Tue, 8 Jul 2025 23:52:30 +0200
From: Andrew Lunn <andrew@...n.ch>
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>,
	Jakub Kicinski <kuba@...nel.org>, 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>
Subject: Re: [PATCH v2 3/4] net: renesas: rswitch: add offloading for L2
 switching

On Tue, Jul 08, 2025 at 11:27:39AM +0200, Michael Dege wrote:
> This commit adds hardware offloading for L2 switching on R-Car S4.
> 
> On S4 brdev is limited to one per-device (not per port). Reasoning
> is that hw L2 forwarding support lacks any sort of source port based
> filtering, which makes it unusable to offload more than one bridge
> device. Either you allow hardware to forward destination MAC to a
> port, or you have to send it to CPU. You can't make it forward only
> if src and dst ports are in the same brdev.
> 
> Signed-off-by: Michael Dege <michael.dege@...esas.com>
> Signed-off-by: Nikita Yushchenko <nikita.yoush@...entembedded.com>

Since you are submitting this, your Signed-off-by: should be last.

	Andrew