Re: [Linuxptp-users] recvmsg tx timestamp failed: Resource temporarily unavailable

[Richard C. <ric...@gm...>]

On Tue, Feb 05, 2013 at 09:23:03PM +0530, Rayagond Kokatanur wrote:
> 
> I am not getting how to write configuration file that can be provided as
> input to *ptp4l, *please send me one example.

There are two example files in the code, default.cfg, and gPTP.cfg.
I would start with the first one.

> Yes, it is unpublished driver and I referred Linux driver and document and
> added PTP support into my driver.
> 
> I have written PHC driver, but its not yet complete, need to implement some
> other clock operations like .adjfreq and .enable.

You can leave .enable as a stub, but you must implement the other
methods, otherwise you won't be able to run PTP.
 
> My test setup is as below,
> 
> 1. Two system connected back to back and both the system running Linux
> 3.1.1 kernel.
> 2. On one side my HW and driver is running and on other side realteck 8169
> driver is running. I modified the realteck driver to support software
> timestamping ie added "skb_tx_timestamp()" in start_xmit function. Since I
> don't have other NIC card that support HW time stamping, so I am using
> software timestaping on other side.
> 
> So is it possible to do basic validation/tetsing of PTP using above setup ?

Yes, I think so.
 
> Feb  5 20:11:04 snps ptp4l: [17640.898] failed to adjust the clock:
> Operation not supported

Because your driver isn't finished.
 
> I am new to PTP so not able to understand the above log completely, please
> let me know if my test setup is correct or not.

Looks okay to me. 

HTH,
Richard