Re: [PATCH v5 net-next 5/5] net: dsa: microchip: Enable HSR offloading for KSZ9477

[Florian Fainelli]

On 9/20/23 04:43, Lukasz Majewski wrote:
> This patch adds functions for providing in KSZ9477 switch HSR
> (High-availability Seamless Redundancy) hardware offloading.
>
> According to AN3474 application note following features are provided:
> - TX packet duplication from host to switch (NETIF_F_HW_HSR_DUP)
> - RX packet duplication discarding
> - Prevention of packet loop
>
> For last two ones - there is a probability that some packets will not
> be filtered in HW (in some special cases - described in AN3474).
> Hence, the HSR core code shall be used to discard those not caught frames.
>
> Moreover, some switch registers adjustments are required - like setting
> MAC address of HSR network interface.
>
> Additionally, the KSZ9477 switch has been configured to forward frames
> between HSR ports (e.g. 1,2) members to provide support for
> NETIF_F_HW_HSR_FWD flag.
>
> Join and leave functions are written in a way, that are executed with
> single port - i.e. configuration is NOT done only when second HSR port
> is configured.
>
> Co-developed-by: Vladimir Oltean <vladimir.oltean@xxxxxxx>
> Signed-off-by: Vladimir Oltean <vladimir.oltean@xxxxxxx>
> Signed-off-by: Lukasz Majewski <lukma@xxxxxxx>

Reviewed-by: Florian Fainelli <florian.fainelli@xxxxxxxxxxxx>
--
Florian