netdev - Re: [PATCH net-next v3 4/4] net: lan966x: Add ptp trap rules

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Date:   Thu, 08 Dec 2022 10:27:48 +0100
From:   Michael Walle <michael@...le.cc>
To:     horatiu.vultur@...rochip.com
Cc:     Steen.Hegelund@...rochip.com, UNGLinuxDriver@...rochip.com,
        daniel.machon@...rochip.com, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, lars.povlsen@...rochip.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, olteanv@...il.com, pabeni@...hat.com,
        richardcochran@...il.com
Subject: Re: [PATCH net-next v3 4/4] net: lan966x: Add ptp trap rules

Am 2022-12-08 10:25, schrieb Michael Walle:
> Hi Horatiu,
> 
>> Currently lan966x, doesn't allow to run PTP over interfaces that are
>> part of the bridge. The reason is when the lan966x was receiving a
>> PTP frame (regardless if L2/IPv4/IPv6) the HW it would flood this
>> frame.
>> Now that it is possible to add VCAP rules to the HW, such to trap 
>> these
>> frames to the CPU, it is possible to run PTP also over interfaces that
>> are part of the bridge.
> 
> This gives me:
> 
> # /etc/init.d/S65ptp4l start
> Starting linuxptp daemon: OK
> [   44.136870] vcap_val_rule:1678: keyset was not updated: -22
> [   44.140196] vcap_val_rule:1678: keyset was not updated: -22
> #
> 
> # ptp4l -v
> 3.1.1
> # uname -a
> Linux buildroot 6.1.0-rc8-next-20221208+ #924 SMP Thu Dec  8 10:08:58
> CET 2022 armv7l GNU/Linux
> 
> I don't know whats going on, but I'm happy to help with debugging with 
> some
> guidance.

Oh, and linuxptp is running on eth0, no bridges are set up. linuxptp
is started with "/usr/sbin/ptp4l -f /etc/linuxptp.cfg"

# cat /etc/linuxptp.cfg
# LinuxPTP configuration file for synchronizing the system clock to
# a remote PTP master in slave-only mode.
#
# By default synchronize time in slave-only mode using UDP and hardware 
time
# stamps on eth0. If the difference to master is >1.0 second correct by
# stepping the clock instead of adjusting the frequency.
#
# If you change the configuration don't forget to update the phc2sys
# parameters accordingly in linuxptp-system-clock.service (systemd)
# or the linuxptp SysV init script.

[global]
slaveOnly		1
delay_mechanism		Auto
network_transport	UDPv4
time_stamping		hardware
step_threshold		1.0

[eth0]

-michael