netdev - Re: net: dsa: mv88e6xxx: no multicasts rx'd after enabling hw time stamping

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Message-ID: <20210728222457.GA10360@hoboy.vegasvil.org>
Date:   Wed, 28 Jul 2021 15:24:57 -0700
From:   Richard Cochran <richardcochran@...il.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     George McCollister <george.mccollister@...il.com>,
        netdev <netdev@...r.kernel.org>
Subject: Re: net: dsa: mv88e6xxx: no multicasts rx'd after enabling hw time
 stamping

On Wed, Jul 28, 2021 at 11:04:59PM +0200, Andrew Lunn wrote:
> On Wed, Jul 28, 2021 at 03:44:24PM -0500, George McCollister wrote:
> > If I do the following on one of my mv88e6390 switch ports I stop
> > receiving multicast frames.
> > hwstamp_ctl -i lan0 -t 1 -r 12
> > 
> > Has anyone seen anything like this or have any ideas what might be
> > going on? Does anyone have PTP working on the mv88e6390?
> > 
> > I tried this but it doesn't help:
> > ip maddr add 01:xx:xx:xx:xx:xx dev lan0
> > 
> > I've tried sending 01:1B:19:00:00:00, 01:80:C2:00:00:0E as well as
> > other random ll multicast addresses. Nothing gets through once
> > hardware timestamping is switched on. The switch counters indicate
> > they're making it into the outward facing switch port but are not
> > being sent out the CPU facing switch port. I ran into this while
> > trying to get ptp4l to work.
> 
> Hi George
> 
> All my testing was i think on 6352.

Mine, too.  IIRC, the PTP stuff for most (all?) of the other parts was
added "blindly" into the driver, based on similarity in the data
sheets.

So maybe 6390 has never been tried?

Thanks,
Richard