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Date:   Thu, 21 Sep 2023 10:50:33 -0700
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Subject: Re: [PATCH v5 net-next 3/5] net: dsa: tag_ksz: Extend ksz9477_xmit()
 for HSR frame duplication
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To:     Lukasz Majewski <lukma@denx.de>, Tristram.Ha@microchip.com,
        Eric Dumazet <edumazet@google.com>,
        Andrew Lunn <andrew@lunn.ch>, davem@davemloft.net,
        Woojung Huh <woojung.huh@microchip.com>,
        Vladimir Oltean <olteanv@gmail.com>,
        Oleksij Rempel <o.rempel@pengutronix.de>
Cc:     Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
        UNGLinuxDriver@microchip.com, netdev@vger.kernel.org,
        linux-kernel@vger.kernel.org
References: <20230920114343.1979843-1-lukma@denx.de>
 <20230920114343.1979843-4-lukma@denx.de>
From:   Florian Fainelli <f.fainelli@gmail.com>
In-Reply-To: <20230920114343.1979843-4-lukma@denx.de>
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On 9/20/23 04:43, Lukasz Majewski wrote:
> The KSZ9477 has support for HSR (High-Availability Seamless Redundancy).
> One of its offloading (i.e. performed in the switch IC hardware) features
> is to duplicate received frame to both HSR aware switch ports.
> 
> To achieve this goal - the tail TAG needs to be modified. To be more
> specific, both ports must be marked as destination (egress) ones.
> 
> The NETIF_F_HW_HSR_DUP flag indicates that the device supports HSR and
> assures (in HSR core code) that frame is sent only once from HOST to
> switch with tail tag indicating both ports.
> 
> Signed-off-by: Lukasz Majewski <lukma@denx.de>

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