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Date:   Mon, 20 Jul 2020 07:21:46 -0700
From:   Richard Cochran <>
To:     Kurt Kanzenbach <>
Cc:     Russell King <>,
        Andrew Lunn <>,
        Florian Fainelli <>,
        Heiner Kallweit <>,
        "David S. Miller" <>,
        Jakub Kicinski <>,
Subject: Re: [PATCH RFC net-next] net: phy: add Marvell PHY PTP support

On Fri, Jul 17, 2020 at 07:24:46PM -0700, Richard Cochran wrote:
> On Fri, Jul 17, 2020 at 09:54:07AM +0200, Kurt Kanzenbach wrote:
> > I'll post the next version of the hellcreek DSA driver probably next
> > week. I can include a generic ptp_header() function if you like in that
> > patch series. But, where to put it? ptp core or maybe ptp_classify?
> Either place is fine with me.  Maybe it makes most sense in ptp_classify?
> Please put the re-factoring in a separate patches, before the new
> driver.

And maybe the new header parsing routine should provide a pointer to a
structure with the message layout.  Something similar to this (from
the linuxptp user stack) might work.

struct ptp_header {
	uint8_t             tsmt; /* transportSpecific | messageType */
	uint8_t             ver;  /* reserved          | versionPTP  */
	UInteger16          messageLength;
	UInteger8           domainNumber;
	Octet               reserved1;
	Octet               flagField[2];
	Integer64           correction;
	UInteger32          reserved2;
	struct PortIdentity sourcePortIdentity;
	UInteger16          sequenceId;
	UInteger8           control;
	Integer8            logMessageInterval;

Of course, the structure should use the kernel types that include the
big endian annotations.


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