linux-kernel - Re: [PATCH v2 2/2] drivers: net: dsa: qca8k: add support for multiple cpu port

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Message-ID: <YGz/nu117LDEhsou@lunn.ch>
Date:   Wed, 7 Apr 2021 02:41:02 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Ansuel Smith <ansuelsmth@...il.com>
Cc:     Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/2] drivers: net: dsa: qca8k: add support for
 multiple cpu port

On Tue, Apr 06, 2021 at 06:50:40AM +0200, Ansuel Smith wrote:
> qca8k 83xx switch have 2 cpu ports. Rework the driver to support
> multiple cpu port. All ports can access both cpu ports by default as
> they support the same features.

Do you have more information about how this actually works. How does
the switch decide which port to use when sending a frame towards the
CPU? Is there some sort of load balancing?

How does Linux decide which CPU port to use towards the switch?

    Andrew