linux-kernel - Re: [PATCH net-next RFC 0/9] net: dsa: PTP timestamping for mv88e6xxx

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Date:   Mon, 6 Nov 2017 06:55:46 -0800
From:   Richard Cochran <richardcochran@...il.com>
To:     Brandon Streiff <brandon.streiff@...com>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...oirfairelinux.com>,
        Erik Hons <erik.hons@...com>
Subject: Re: [PATCH net-next RFC 0/9] net: dsa: PTP timestamping for mv88e6xxx

On Sun, Oct 08, 2017 at 11:38:21AM -0400, Richard Cochran wrote:
> I will try to get my hands on some HW, perhaps by the end of October,
> in order to test and complete your driver...

I now have a 88E6352 to test your series on.  Unfortunately, it
doesn't really work. Here is what I did.

1. Gave one of the external switch ports an address (ifconfig ext0
   192.168.1.111)

2. Ran ptp4l with option 'free_running 1'.

When I run with Layer2 transport and the switch as master, it seems to
work.  Any other combination of role + transport fails.

| Switch Role | Tranport | Result                                         |
|-------------+----------+------------------------------------------------|
| master      | UDPv4    | no Delay_Resp appear at slave                  |
| master      | UDPv6    | no Delay_Resp appear at slave                  |
| master      | layer2   | seems okay                                     |
| slave       | layer2   | Announce messages not getting through to host? |

Have you tested any of this?

Do I need some special switch configuration first?

 
Thanks,
Richard