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Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.15.1 Subject: Re: [PATCH v5 net-next 5/5] net: dsa: microchip: Enable HSR offloading for KSZ9477 Content-Language: en-US To: Lukasz Majewski , Tristram.Ha@microchip.com, Eric Dumazet , Andrew Lunn , davem@davemloft.net, Woojung Huh , Vladimir Oltean , Oleksij Rempel Cc: Jakub Kicinski , Paolo Abeni , UNGLinuxDriver@microchip.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Vladimir Oltean References: <20230920114343.1979843-1-lukma@denx.de> <20230920114343.1979843-6-lukma@denx.de> From: Florian Fainelli In-Reply-To: <20230920114343.1979843-6-lukma@denx.de> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 > Signed-off-by: Vladimir Oltean > Signed-off-by: Lukasz Majewski Reviewed-by: Florian Fainelli -- Florian