netdev - Re: [PATCH net-next v2 0/8] rework phylink interface for split MAC/PCS support

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Date:   Thu, 27 Feb 2020 22:13:15 +0000
From:   Russell King - ARM Linux admin <linux@...linux.org.uk>
To:     David Miller <davem@...emloft.net>
Cc:     andrew@...n.ch, linux-doc@...r.kernel.org,
        thomas.petazzoni@...tlin.com, ioana.ciornei@....com,
        linux-stm32@...md-mailman.stormreply.com, f.fainelli@...il.com,
        corbet@....net, michal.simek@...inx.com, joabreu@...opsys.com,
        kuba@...nel.org, Mark-MC.Lee@...iatek.com, sean.wang@...iatek.com,
        alexandre.torgue@...com, hauke@...ke-m.de,
        radhey.shyam.pandey@...inx.com, linux-mediatek@...ts.infradead.org,
        john@...ozen.org, matthias.bgg@...il.com, peppe.cavallaro@...com,
        linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org,
        vivien.didelot@...il.com, mcoquelin.stm32@...il.com, nbd@....name,
        olteanv@...il.com, hkallweit1@...il.com
Subject: Re: [PATCH net-next v2 0/8] rework phylink interface for split
 MAC/PCS support

On Thu, Feb 27, 2020 at 12:02:54PM -0800, David Miller wrote:
> From: Russell King - ARM Linux admin <linux@...linux.org.uk>
> Date: Wed, 26 Feb 2020 10:23:12 +0000
> 
> > The following series changes the phylink interface to allow us to
> > better support split MAC / MAC PCS setups.  The fundamental change
> > required for this turns out to be quite simple.
> > 
> > Today, mac_config() is used for everything to do with setting the
> > parameters for the MAC, and mac_link_up() is used to inform the
> > MAC driver that the link is now up (and so to allow packet flow.)
> > mac_config() also has had a few implementation issues, with folk
> > who believe that members such as "speed" and "duplex" are always
> > valid, where "link" gets used inappropriately, etc.
> > 
> > With the proposed patches, all this changes subtly - but in a
> > backwards compatible way at this stage.
> > 
> > We pass the the full resolved link state (speed, duplex, pause) to
> > mac_link_up(), and it is now guaranteed that these parameters to
> > this function will always be valid (no more SPEED_UNKNOWN or
> > DUPLEX_UNKNOWN here - unless phylink is fed with such things.)
> > 
> > Drivers should convert over to using the state in mac_link_up()
> > rather than configuring the speed, duplex and pause in the
> > mac_config() method. The patch series includes a number of MAC
> > drivers which I've thought have been easy targets - I've left the
> > remainder as I think they need maintainer input. However, *all*
> > drivers will need conversion for future phylink development.
> > 
> > v2: add ocelot/felix and qca/ar9331 DSA drivers to patch 2, add
> >   received tested-by so far.
> 
> In order to end the storm in a teacup, I've applied this series.
> 
> :-)
> 
> Thanks Russell.

Thanks David, I was getting concerned that the teacup might break! :p

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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