linux-kernel - Re: [PATCH] dpaa2-ethsw: move the DPAA2 Ethernet Switch driver out of staging

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Date:   Mon, 12 Aug 2019 16:03:11 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Ioana Ciornei <ioana.ciornei@....com>
Cc:     "davem@...emloft.net" <davem@...emloft.net>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "f.fainelli@...il.com" <f.fainelli@...il.com>,
        Ioana Ciocoi Radulescu <ruxandra.radulescu@....com>
Subject: Re: [PATCH] dpaa2-ethsw: move the DPAA2 Ethernet Switch driver out
 of staging

> >> Yes, we only support a single bridge.
> > 
> > That is a pretty severe restriction for a device of this class. Some
> > of the very simple switches DSA support have a similar restriction,
> > but in general, most do support multiple bridges.
> > 
> 
> Let me make a distinction here: we do no support multiple bridges on the 
> same DPSW object but we do support multiple DPSW objects, each with its 
> bridge.
> 
> 
> > Are there any plans to fix this?
> > 
> 
> We had some internal discussions on this, the hardware could support 
> this kind of further partitioning the switch object but, at the moment, 
> the firmware doesn't.

I assume the firmware allows you to create switch objects on the fly?

I think this was discussed a long time ago, but why not create a new
switch object when you need it? That seems like the whole point of
this dynamic hardware design of dpaa2.

     Andrew