netdev - Re: [PATCH 0/7] ethtool: add pretty dump for DSA mv88e6xxx drivers

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Message-ID: <20181215174849.GE5922@lunn.ch>
Date:   Sat, 15 Dec 2018 18:48:49 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Florian Fainelli <f.fainelli@...il.com>
Cc:     Vivien Didelot <vivien.didelot@...il.com>, netdev@...r.kernel.org,
        Chris Healy <cphealy@...il.com>,
        "John W . Linville" <linville@...driver.com>
Subject: Re: [PATCH 0/7] ethtool: add pretty dump for DSA mv88e6xxx drivers

On Sat, Dec 15, 2018 at 09:28:41AM -0800, Florian Fainelli wrote:
> Hi Vivien,
> 
> Le 12/14/18 à 6:50 PM, Vivien Didelot a écrit :
> > This patch series adds support to pretty dump the registers of user
> > ports created by the kernel "dsa" subsystem.
> > 
> > The first patch adds the base support for "dsa" interfaces.
> > 
> > The second patch adds the boilerplate for the "mv88e6xxx" DSA driver,
> > all using 32 registers of 16 bits, the switch ID being available in
> > the port identification register 3. Support for other DSA drivers such
> > as "b53" or "ksz" can be added similarly later. Because the different
> > switches supported by mv88e6xxx have slightly different register layout,
> > we keep it simple and stupid by providing one dump function per switch.
> 
> This looks good to me, the only "concern" is that mv88e6xxx set
> regs->version = 0, while we could probably put the switch model in there
> directly which would avoid other drivers to have to put the chip ID in
> regs[3] since that may, or may not be convenient.

Hi Florian, Vivien

I was wondering about that. Having this all under 'dsa' seems too
granular. It would be better if we could have 'mv88e6xxx', 'b53',
'ksz', etc. That might need a new DSA driver op to get the driver name
which we then use for the slave?

	Andrew