linux-kernel - Re: [PATCH v5 net-next 3/5] net: dsa: tag_ksz: Extend ksz9477

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Message-ID: <ab3076e2-5f65-e517-17f9-00249aabe51f@gmail.com>
Date:   Thu, 21 Sep 2023 10:50:33 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Lukasz Majewski <lukma@...x.de>, Tristram.Ha@...rochip.com,
        Eric Dumazet <edumazet@...gle.com>,
        Andrew Lunn <andrew@...n.ch>, davem@...emloft.net,
        Woojung Huh <woojung.huh@...rochip.com>,
        Vladimir Oltean <olteanv@...il.com>,
        Oleksij Rempel <o.rempel@...gutronix.de>
Cc:     Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
        UNGLinuxDriver@...rochip.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 net-next 3/5] net: dsa: tag_ksz: Extend ksz9477_xmit()
 for HSR frame duplication

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@...x.de>

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