netdev - Re: [PATCH RFC net-next 0/3] Multi-CPU DSA support

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Message-ID: <20190824194546.5c436bd6@nic.cz>
Date:   Sat, 24 Aug 2019 19:45:46 +0200
From:   Marek Behun <marek.behun@....cz>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     netdev@...r.kernel.org, Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        David Ahern <dsahern@...il.com>,
        Stephen Hemminger <stephen@...workplumber.org>
Subject: Re: [PATCH RFC net-next 0/3] Multi-CPU DSA support

On Sat, 24 Aug 2019 17:24:07 +0200
Andrew Lunn <andrew@...n.ch> wrote:

> So this is all about transmit from the host out the switch. What about
> receive? How do you tell the switch which CPU interface it should use
> for a port?

Andrew, we use the same. The DSA slave implementation of ndo_set_iflink
will also tell the switch driver to change the CPU port for that port.
Patch 3 also adds operation port_change_cpu_port to the DSA switch
operations. This is called from dsa_slave_set_iflink (at least in this
first proposal).

Marek