Re: [Linuxptp-users] How to properly use twoStepFlag=0

[Timo K. <tko...@ci...>]

Hi,

thanks for the advice.
I now have a ZynqMP running petalinux and a Marvel Alaska 88E1512 using 
the PTP-able macb driver from linux mainline [1].

ethtool looks ok but the driver produces kernel oopsies after the first 
1-step sync (Announce -> Sync) was send by ptp4l.
I'll give feedback after I've updated (and hopefully fixed) everything.

Greetings,
Timo

root@petalinux:~# ethtool -T eth0
Time stamping parameters for eth0:
Capabilities:
     hardware-transmit     (SOF_TIMESTAMPING_TX_HARDWARE)
     software-transmit     (SOF_TIMESTAMPING_TX_SOFTWARE)
     hardware-receive      (SOF_TIMESTAMPING_RX_HARDWARE)
     software-receive      (SOF_TIMESTAMPING_RX_SOFTWARE)
     software-system-clock (SOF_TIMESTAMPING_SOFTWARE)
     hardware-raw-clock    (SOF_TIMESTAMPING_RAW_HARDWARE)
PTP Hardware Clock: 0
Hardware Transmit Timestamp Modes:
     off                   (HWTSTAMP_TX_OFF)
     on                    (HWTSTAMP_TX_ON)
     one-step-sync         (HWTSTAMP_TX_ONESTEP_SYNC)
Hardware Receive Filter Modes:
     none                  (HWTSTAMP_FILTER_NONE)
     all                   (HWTSTAMP_FILTER_ALL)



[1] 
https://github.com/torvalds/linux/tree/master/drivers/net/ethernet/cadence

On 13.01.19 21:50, Richard Cochran wrote:
> On Fri, Jan 11, 2019 at 06:03:53PM +0100, Timo Korthals wrote:
>> we try to sync embedded devices, which are only capable of
>> PTP_TWO_STEP=FALSE (aka twoStepFlag=0 aka one-way-sync aka PTP_Sync=1)
>> syncing,
> Your embedded devices do not comply with IEEE 1588 or with 802.1-AS.
> It is required to accept two-step synchronization.
>
>> ptp4l[5819.089]: ioctl SIOCSHWTSTAMP failed: Numerical result out of range
> ^^^ You don't have one-step hardware.
>
>> We followed the instructions from [2] and [3] without success.
>> We also tried another PTP hardware capable intel network card with e1000e
>> driver with the exact same log messages.
>> We also tried all versions from 1.8 to master branch, while version <= 1.7
>> ignores the twoStepFlag=0 option.
>> However, software timestamping and twoStepFlag=1 works between two linux
>> hosts
>>
>> Does anyone see our fault or has similar issues?
> If you want one-step, then you will have to use one-step HW.
>
> Sorry,
> Richard

-- 

Timo Korthals, M.Sc.
Universität Bielefeld
AG Kognitronik & Sensorik
Exzellenzcluster Cognitive Interaction Technology (CITEC)
Inspiration 1 (Zehlendorfer Damm 201)
33619 Bielefeld - Germany

Office  : 3.413
Phone   : +49 521 106-67367
eMail   : tko...@ci...
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