Re: [Linuxptp-users] Is there any interface between ptp driver and linuxptp for controlling the ptp hardware?

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

On Wed, Mar 14, 2012 at 05:26:18PM +0900, Takahiro Shimizu wrote:
> Yes, I agree. You will have to live with a work around. Your hardware
> > really cannot support IEEE Std 1588-2008. For peer delay mechanism via
> > L2, you must accept two *different* MAC addresses.
> >
> > Your driver will have to program the correct multicast MAC address
> > based on the SIOCSHWTSTAMP ioctl. Your driver can only support certain
> > values for rx_filter:
> >
> >  HWTSTAMP_FILTER_PTP_V2_L4_EVENT  SA = 01:00:5e:00:01:81 (E2E mechanism
> > only)
> >  HWTSTAMP_FILTER_PTP_V2_L2_EVENT  SA = 01:1b:19:00:00:00 (E2E mechanism
> > only)
> >  HWTSTAMP_FILTER_PTP_V2_EVENT     not supported!
> >
> >
> I have some question.
> 1. If SA means Distination MAC address (Station Address register 1-6),
> could you tell me the usage of the above ioctl?

Sorry for the confusion. I meant SA = Station Address.

> Now linuxptp uses HWTSTAMP_FILTER_PTP_V2_EVENT. If I implement the driver
> like the above, I modify the linuxptp using HWTSTAMP_FILTER_PTP_V2_L4_EVENT
> or HWTSTAMP_FILTER_PTP_V2_L2_EVENT and test them?

Yes that is right.

> I can accept two *different * Source MAC address for Rx message. I can not
> accept two *different* Destination MAC address for RX message.

Yes, and that is why the hardware will not fully support PTPv2.

Richard