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 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. Usage example: ip link change dev br0 type bridge ageing 100 Changes in v4: - Added target tree to subject prefix. - refactored rswitch_update_l2_hw_learning() and rswitch_update_l2_hw_forwarding() to remove duplicate code. - In function rswitch_update_offload_brdev() removed unused force_update_l2_offload parameter. - Link to v3: https://lore.kernel.org/r/20250710-add_l2_switching-v3-0-c0a328327b43@xxxxxxxxxxx Changes in v3: - Split void rswitch_update_l2_offload(struct rswitch_private *priv) into two functions to reduce the complexity. - In rswitch_switchdev_blocking_event() returning -EOPNOTSUPP directly for unsupported events intead of calling function which returned -EOPNOTSUPP. - Retuning result from rswitch_reg_wait() directly instead of using local variable at end of function. - Restructured rswitch_update_offload_brdev() to fix smatch false-positive report. - Fixed reviewed-by tags in [1/4] - Fixed oder of signed-off-by tags in [2/4] - Removed magic number in [2/4] - Link to v2: https://lore.kernel.org/r/20250708-add_l2_switching-v2-0-f91f5556617a@xxxxxxxxxxx Changes in v2: - Pulled default ageing setting into separate patch. - Changed logging priority from info to dbg. - Updated usage examples. - Fixed passing of ageing parameter. Parameter is already in seconds no need to convert. Parameter checking improved. - Updated commit message of [3/4] to point out that the switch hardware only supports the offloading of one bridge device. - Link to v1: https://lore.kernel.org/r/20250704-add_l2_switching-v1-0-ff882aacb258@xxxxxxxxxxx Thanks, Michael Signed-off-by: Michael Dege <michael.dege@xxxxxxxxxxx> Signed-off-by: Nikita Yushchenko <nikita.yoush@xxxxxxxxxxxxxxxxxx> --- To: Niklas Söderlund <niklas.soderlund@xxxxxxxxxxxx> To: Paul Barker <paul@xxxxxxxxxxx> To: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx> To: Andrew Lunn <andrew+netdev@xxxxxxx> To: David S. Miller <davem@xxxxxxxxxxxxx> To: Eric Dumazet <edumazet@xxxxxxxxxx> To: Jakub Kicinski <kuba@xxxxxxxxxx> To: Paolo Abeni <pabeni@xxxxxxxxxx> Cc: netdev@xxxxxxxxxxxxxxx Cc: linux-renesas-soc@xxxxxxxxxxxxxxx Cc: linux-kernel@xxxxxxxxxxxxxxx --- Michael Dege (4): net: renesas: rswitch: rename rswitch.c to rswitch_main.c net: renesas: rswitch: configure default ageing time 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 | 317 +++++++++++++++++++++ drivers/net/ethernet/renesas/rswitch_l2.h | 15 + .../ethernet/renesas/{rswitch.c => rswitch_main.c} | 86 +++++- 5 files changed, 456 insertions(+), 6 deletions(-) --- base-commit: 19272b37aa4f83ca52bdf9c16d5d81bdd1354494 change-id: 20250616-add_l2_switching-345117105d0d Best regards, -- Michael Dege <michael.dege@xxxxxxxxxxx>
