Re: RFC: Capability addition for IEEE 1588

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From: Jack Vogel
Date: Wednesday, October 3, 2007 - 10:52 am

I am adding support into the em driver for PTP, what I would prefer doing is
to add interface capability support: IFCAP_TSYNC or something like that.
The driver will then enable/disable the feature.

Are there other vendor's hardware providing this support such that a
net/if.h capability would be justified?

There was also some other defines that are needed, an ethertype
for instance, I forget what it was offhand but I did notice it wasn't
there yet.

Cheers,

Jack
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From: Poul-Henning Kamp
Date: Wednesday, October 3, 2007 - 10:59 am

When I talked to HP's licensing department, there were a $1k licensefee
for anything IEEE1588 related and their message was that even if
the FreeBSD foundation got such a license, the users would still
have to have one as well if they compiled the source code or some
such nonsense.

If this has all been taken care of:  Go for it!

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.
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From: Jack Vogel
Date: Wednesday, October 3, 2007 - 1:06 pm

What source code was being talked about? I'm not talking about
anything userland, and my driver is just turning on a hardware
feature, I can't imagine HP having anything to do with it, but I
double check internally.

Also, there is the ptpd project on sourceforge, that even uses
a BSD rather than GPL license, should be easy to use, but
I'm new to this so its possible I'm missing something? I'm
basically tasked with adding driver support, what happens
to actually use it is another matter :)


Jack
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From: Poul-Henning Kamp
Date: Wednesday, October 3, 2007 - 1:11 pm

They seem to think they have a patent on doing things that way,
no matter what hardware or software you use.

If Intel chips have hw-support for timestamping, somebody at intel
must have thought about the patent thing.

But as I said, if that can be resolved, it should certainly go in.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.
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From: Jack Vogel
Date: Wednesday, October 3, 2007 - 1:51 pm

This is a feature that will be coming, its not in any hardware you
can buy today, presumeably Intel dealt with the patent thing, but
I have already sent internal email checking on the whole matter.

I'll followup when I'm things are clarified.

Jack
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From: Wilkinson, Alex
Date: Wednesday, October 3, 2007 - 11:47 pm

0n Wed, Oct 03, 2007 at 10:52:43AM -0700, Jack Vogel wrote: 

    >I am adding support into the em driver for PTP

PTP ?

 -aW

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From: Wilkinson, Alex
Date: Wednesday, October 3, 2007 - 11:59 pm

0n Thu, Oct 04, 2007 at 02:47:37PM +0800, Wilkinson, Alex wrote: 

    >    0n Wed, Oct 03, 2007 at 10:52:43AM -0700, Jack Vogel wrote: 
    >
    >    >I am adding support into the em driver for PTP
    >
    >PTP ?

Found http://ptpd.sourceforge.net/. Sorry for the noise.

 -aW

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