From: Kurt Kanzenbach <kurt@linutronix.de>
To: Richard Cochran <richardcochran@gmail.com>
Cc: Russell King - ARM Linux admin <linux@armlinux.org.uk>,
Petr Machata <petrm@mellanox.com>, Andrew Lunn <andrew@lunn.ch>,
Vivien Didelot <vivien.didelot@gmail.com>,
Florian Fainelli <f.fainelli@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>, Jiri Pirko <jiri@mellanox.com>,
Ido Schimmel <idosch@mellanox.com>,
Heiner Kallweit <hkallweit1@gmail.com>,
Grygorii Strashko <grygorii.strashko@ti.com>,
Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>,
Samuel Zou <zou_wei@huawei.com>,
netdev@vger.kernel.org
Subject: Re: [PATCH v2 4/9] mlxsw: spectrum_ptp: Use generic helper function
Date: Wed, 29 Jul 2020 16:26:00 +0200 [thread overview]
Message-ID: <87eeou9z47.fsf@kurt> (raw)
In-Reply-To: <20200729134958.GC23222@hoboy>
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On Wed Jul 29 2020, Richard Cochran wrote:
> On Wed, Jul 29, 2020 at 12:29:08PM +0200, Kurt Kanzenbach wrote:
>> I'll test it and send v3. But before, I've got another question that
>> somebody might have an answer to:
>>
>> The ptp v1 code always does locate the message type at
>>
>> msgtype = data + offset + OFF_PTP_CONTROL
>>
>> OFF_PTP_CONTROL is 32. However, looking at the ptp v1 header, the
>> message type is located at offset 20. What am I missing here?
>
>
> My source back in the day was the John Eidson book. In Appendix A it claims
>
>
> Table A.1. Common PTP message fields
>
> Field name Purpose
> --------------------------------------------------------------------
> messageType Identifies message as event or general
> control Indicates the message type, e.g., Sync
OK. That was the missing piece. I'll adjust patch 2 accordingly. Thanks
a lot.
Thanks,
Kurt
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next prev parent reply other threads:[~2020-07-29 14:26 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-27 9:05 [PATCH v2 0/9] ptp: Add generic header parsing function Kurt Kanzenbach
2020-07-27 9:05 ` [PATCH v2 1/9] ptp: Add generic ptp v2 " Kurt Kanzenbach
2020-07-27 9:05 ` [PATCH v2 2/9] ptp: Add generic ptp message type function Kurt Kanzenbach
2020-07-27 9:05 ` [PATCH v2 3/9] net: dsa: mv88e6xxx: Use generic helper function Kurt Kanzenbach
2020-07-27 9:05 ` [PATCH v2 4/9] mlxsw: spectrum_ptp: " Kurt Kanzenbach
2020-07-27 13:00 ` Petr Machata
2020-07-28 13:29 ` Kurt Kanzenbach
2020-07-28 13:41 ` Kurt Kanzenbach
2020-07-28 21:06 ` Petr Machata
2020-07-29 10:02 ` Russell King - ARM Linux admin
2020-07-29 10:29 ` Kurt Kanzenbach
2020-07-29 13:49 ` Richard Cochran
2020-07-29 14:26 ` Kurt Kanzenbach [this message]
2020-07-29 14:07 ` Petr Machata
2020-07-29 13:22 ` Richard Cochran
2020-07-29 12:23 ` Grygorii Strashko
2020-07-27 9:05 ` [PATCH v2 5/9] ethernet: ti: am65-cpts: " Kurt Kanzenbach
2020-07-27 9:05 ` [PATCH v2 6/9] ethernet: ti: cpts: " Kurt Kanzenbach
2020-07-27 9:05 ` [PATCH v2 7/9] net: phy: dp83640: " Kurt Kanzenbach
2020-07-27 9:06 ` [PATCH v2 8/9] ptp: ptp_ines: " Kurt Kanzenbach
2020-07-27 9:06 ` [PATCH v2 9/9] ptp: Remove unused macro Kurt Kanzenbach
2020-07-29 0:47 ` [PATCH v2 0/9] ptp: Add generic header parsing function David Miller
2020-07-29 9:31 ` Kurt Kanzenbach
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