netdev - Re: [PATCH 0/7] net: dsa: add QCA AR8xxx switch family support\

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Message-ID: <20150529185953.GF19580@lunn.ch>
Date:	Fri, 29 May 2015 20:59:53 +0200
From:	Andrew Lunn <andrew@...n.ch>
To:	Mathieu Olivari <mathieu@...eaurora.org>
Cc:	robh+dt@...nel.org, pawel.moll@....com, mark.rutland@....com,
	ijc+devicetree@...lion.org.uk, galak@...eaurora.org,
	davem@...emloft.net, f.fainelli@...il.com, linux@...ck-us.net,
	gang.chen.5i5j@...il.com, jiri@...nulli.us, leitec@...ticky.com,
	fabf@...net.be, alexander.h.duyck@...el.com,
	pavel.nakonechny@...tlab.ru, joe@...ches.com, sfeldma@...il.com,
	nbd@...nwrt.org, juhosg@...nwrt.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH 0/7] net: dsa: add QCA AR8xxx switch family support\

On Fri, May 29, 2015 at 11:49:54AM -0700, Mathieu Olivari wrote:
> On Fri, May 29, 2015 at 04:00:01AM +0200, Andrew Lunn wrote:
> > FYI:
> > 
> > I have patches which allow DSA to use two cpu interfaces. Seems to
> > work on my DIR665 with a Marvell Switch.
> > 
> > I will post the patches as an RFC.
> > 
> >   Andrew
> 
> Does it require the switch CPU ports to support LAG or is it generic
> enough to allow switch partitioning?

When using tags, DSA by default partitions the switch. Each user port
is separate from other ports. lan4 will not bridge to lan1 unless you
either do it in software, or you implement the
.port_join_bridge/.port_leave_bridge/.port_stp_update methods of
dsa_switch_driver.

What it requires is that for each user port, you can configure what
cpu port it should use. Marvell devices have this ability, and at a
first look, it seems like SF2 does as well, but i will leave Florian
to answer definitively.

I will be posting an RFC patchset later today.

  Andrew
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