linux-kernel - Re: [PATCH v2 net-next 4/6] net: dsa: tag_rtl8

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Date:   Wed, 13 Oct 2021 19:19:28 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Alvin Šipraga <alvin@...s.dk>,
        Linus Walleij <linus.walleij@...aro.org>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>
Cc:     Alvin Šipraga <alsi@...g-olufsen.dk>,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 net-next 4/6] net: dsa: tag_rtl8_4: add realtek 8 byte
 protocol 4 tag



On 10/13/2021 7:50 AM, Alvin Šipraga wrote:
> From: Alvin Šipraga <alsi@...g-olufsen.dk>
> 
> This commit implements a basic version of the 8 byte tag protocol used
> in the Realtek RTL8365MB-VC unmanaged switch, which carries with it a
> protocol version of 0x04.
> 
> The implementation itself only handles the parsing of the EtherType
> value and Realtek protocol version, together with the source or
> destination port fields. The rest is left unimplemented for now.
> 
> The tag format is described in a confidential document provided to my
> company by Realtek Semiconductor Corp. Permission has been granted by
> the vendor to publish this driver based on that material, together with
> an extract from the document describing the tag format and its fields.
> It is hoped that this will help future implementors who do not have
> access to the material but who wish to extend the functionality of
> drivers for chips which use this protocol.
> 
> In addition, two possible values of the REASON field are specified,
> based on experiments on my end. Realtek does not specify what value this
> field can take.
> 
> Signed-off-by: Alvin Šipraga <alsi@...g-olufsen.dk>
> Reviewed-by: Vladimir Oltean <olteanv@...il.com>
> Reviewed-by: Linus Walleij <linus.walleij@...aro.org>

Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
-- 
Florian