Re: [Linuxptp-users] Issues with linuxptp and Intel 82574

[Keller, J. E <jac...@in...>]

Hi Fabrizio,

The sourceforge driver for e1000e has a hard check for kernel version. Since
you have a specialized kernel version that has backported PTP support, you
might try modifying the kcompat.h of the sourceforge driver, and removing
the kernel check.

Basically, the kernel compat layer is blocking proper enablement of the PTP
core because it assumes your kernel can't have support. You won't be able
to get correct support without the flag properly enabling.

Regards,
Jake

> -----Original Message-----
> From: Fabrizio Giordano [mailto:Fab...@ri...]
> Sent: Monday, October 21, 2013 11:07 AM
> To: Richard Cochran
> Cc: lin...@li...
> Subject: Re: [Linuxptp-users] Issues with linuxptp and Intel 82574
> 
> It's basically the standard scientific linux 6.4 kernel.
> 
> uname -a
> Linux dorothy8.lab.nbttech.com 2.6.32-358.18.1.el6.x86_64 #1 SMP
> PREEMPT Wed Sep 4 16:09:45 EDT 2013 x86_64 x86_64 x86_64
> GNU/Linux
> 
> -----Original Message-----
> From: Richard Cochran [mailto:ric...@gm...]
> Sent: Monday, October 21, 2013 10:49
> To: Fabrizio Giordano
> Cc: Vick, Matthew; Ledda William EXT; linuxptp-
> us...@li...
> Subject: Re: [Linuxptp-users] Issues with linuxptp and Intel 82574
> 
> On Mon, Oct 21, 2013 at 05:32:54PM +0000, Fabrizio Giordano wrote:
> > No that's what I find odd...
> > On another machine I have the exact same kernel but I installed an Intel
> 82576.
> > Here's what ethtool -T returns:
> >
> > ethtool -T eth0
> > Time stamping parameters for eth0:
> > Capabilities:
> >         hardware-transmit     (SOF_TIMESTAMPING_TX_HARDWARE)
> >         hardware-receive      (SOF_TIMESTAMPING_RX_HARDWARE)
> >         hardware-raw-clock    (SOF_TIMESTAMPING_RAW_HARDWARE)
> > PTP Hardware Clock: 0
> 
> Okay, so what do you get from `uname -a`?
> 
> > And it actually works with HW timestamps. If it works with another NIC
> and the same kernel I expect that with the proper driver it should work
> also with a 82574.
> > Or am I wrong?
> 
> Tell us more about your kernel. Where did you get it from?
> Is the source available somewhere to look at?
> 
> Thanks,
> Richard
> 
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