netdev - Re: [PATCH net-next 0/4] Fix broken PTP over IP on Ocelot switches

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Date:   Thu, 25 Nov 2021 23:45:21 +0000
From:   Vladimir Oltean <vladimir.oltean@....com>
To:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Po Liu <po.liu@....com>
CC:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Antoine Tenart <atenart@...nel.org>,
        "UNGLinuxDriver@...rochip.com" <UNGLinuxDriver@...rochip.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Xiaoliang Yang <xiaoliang.yang_1@....com>,
        "Y.B. Lu" <yangbo.lu@....com>, Rui Sousa <rui.sousa@....com>,
        Richard Cochran <richardcochran@...il.com>,
        "Allan W . Nielsen" <allan.nielsen@...rochip.com>
Subject: Re: [PATCH net-next 0/4] Fix broken PTP over IP on Ocelot switches

On Fri, Nov 26, 2021 at 01:21:14AM +0200, Vladimir Oltean wrote:
> Po Liu reported recently that timestamping PTP over IPv4 is broken using
> the felix driver on NXP LS1028A. This has been known for a while, of
> course, since it has always been broken. The reason is because IP PTP
> packets are currently treated as unknown IP multicast, which is not
> flooded to the CPU port in the ocelot driver design, so packets don't
> reach the ptp4l program.
> 
> The series solves the problem by installing packet traps per port when
> the timestamping ioctl is called, depending on the RX filter selected
> (L2, L4 or both).
> 
> Vladimir Oltean (4):
>   net: mscc: ocelot: don't downgrade timestamping RX filters in
>     SIOCSHWTSTAMP
>   net: mscc: ocelot: create a function that replaces an existing VCAP
>     filter
>   net: ptp: add a definition for the UDP port for IEEE 1588 general
>     messages
>   net: mscc: ocelot: set up traps for PTP packets
> 
>  drivers/net/ethernet/mscc/ocelot.c      | 247 +++++++++++++++++++++++-
>  drivers/net/ethernet/mscc/ocelot_vcap.c |  16 ++
>  include/linux/ptp_classify.h            |   1 +
>  include/soc/mscc/ocelot_vcap.h          |   2 +
>  4 files changed, 259 insertions(+), 7 deletions(-)
> 
> -- 
> 2.25.1
>

I don't know why I targeted these patches to "net-next". Habit I guess.
Nonetheless, they apply equally well to "net", can they be considered
for merging there without me resending?