linux-kernel - [PATCH 0/3] net: renesas: rswitch: R-Car S4 add HW offloading for layer 2 switching

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Message-Id: <20250704-add_l2_switching-v1-0-ff882aacb258@renesas.com>
Date: Fri, 04 Jul 2025 07:51:14 +0200
From: Michael Dege <michael.dege@...esas.com>
To: 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>
Cc: netdev@...r.kernel.org, linux-renesas-soc@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Michael Dege <michael.dege@...esas.com>, 
 Nikita Yushchenko <nikita.yoush@...entembedded.com>
Subject: [PATCH 0/3] net: renesas: rswitch: R-Car S4 add HW offloading for
 layer 2 switching

Hello!

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 the L2 driver extension in a separate file. The HW offloading
is automatically configured when a port is added to the bridge device.

Ussage example:
ip link add name br type bridge
ip link set dev tsn0 master br
ip link set dev tsn1 master br
ip link set dev br 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.

3. Provides the functionality to set the MAC table ageing time in the
Rswitch.

Usage example:
brctl setageing br 300

Thanks,

Michael

Signed-off-by: Michael Dege <michael.dege@...esas.com>
Signed-off-by: Nikita Yushchenko <nikita.yoush@...entembedded.com>
---
Michael Dege (3):
      net: renesas: rswitch: rename rswitch.c to rswitch_main.c
      net: renesas: rswitch: add offloading for L2 switching
      net: renesas: rswitch: add modifiable ageing time

 drivers/net/ethernet/renesas/Makefile              |   1 +
 drivers/net/ethernet/renesas/rswitch.h             |  43 ++-
 drivers/net/ethernet/renesas/rswitch_l2.c          | 344 +++++++++++++++++++++
 drivers/net/ethernet/renesas/rswitch_l2.h          |  15 +
 .../ethernet/renesas/{rswitch.c => rswitch_main.c} |  88 +++++-
 5 files changed, 485 insertions(+), 6 deletions(-)
---
base-commit: 19272b37aa4f83ca52bdf9c16d5d81bdd1354494
change-id: 20250616-add_l2_switching-345117105d0d

Best regards,
-- 
Michael Dege <michael.dege@...esas.com>