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

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Message-ID:
 <TY4PR01MB142825AC7A0E8AA7AF53D9C168248A@TY4PR01MB14282.jpnprd01.prod.outlook.com>
Date: Thu, 10 Jul 2025 12:37:01 +0000
From: Michael Dege <michael.dege@...esas.com>
To: Andrew Lunn <andrew@...n.ch>
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" <netdev@...r.kernel.org>,
	"linux-renesas-soc@...r.kernel.org" <linux-renesas-soc@...r.kernel.org>,
	"linux-kernel@...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

Hi Andrew,

> -----Original Message-----
> From: Andrew Lunn <andrew@...n.ch>
> Sent: Tuesday, July 8, 2025 11:53 PM
> 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

This is fixed in v3.

Best regards,

Michael
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