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 07:26:42PM +0900, Takahiro Shimizu wrote:
> Hello,
> 
> I get IEEE1588-2008 specification.
> My understanding about your saying is;
> 1. "HWTSTAMP_FILTER_PTP_V2_L4_EVENT  SA = 01:00:5e:00:01:81" means
> "PTP-primary All except peer delay mechanism messages 224.0.1.129" in Table
> D.1 IPv4 multicast addresses in the standard.

Yes.

> 2. "HWTSTAMP_FILTER_PTP_V2_L2_EVENT  SA = 01:1b:19:00:00:00" means "All
> except peer delay mechanism messages 01-1B-19-00-00-00" in Table F.1
> Multicast MAC addresses in the standard.

Yes.

> 3. HWTSTAMP_FILTER_PTP_V2_EVENT means supports L2 event and L4 event at the
> same time. This means we should support both addresses in Table D.1 or F.1
> at the same time.

Yes.

> 4. "How can you support the peer delay mechanism?" means we should support
> "PTP-primary All except peer delay mechanism messages 224.0.1.129" and
> "PTP-pdelay Peer delay mechanism messages 224.0.0.107" or "All except peer
> delay mechanism messages 01-1B-19-00-00-00" and "Peer delay mechanism
> messages 01-80-C2-00-00-0E".
> Is my understanding correct?

Yes, that is correct.

In order to support the peer-to-peer (P2P) mechanism, you need to
accept Ethernet packets with two different destination MAC addresses.

The ptp4l does not yet implement P2P, but I will add this eventually.

Richard