Hello,
I have studied documentation for IEEE 1588 PTP and Intel 82576 with IGB driver.
But I don't get HW timestamps in sending PTP packets?
I am using
linux kernel 2.6.37.6
igb driver 3.1.16
I downloaded a ptpd which works without hw timestamping very well.
When adding hw support nothing happens?
As described in linux documentation following seems to be (additionally)
necessary:
ioctl(sock, SIOCSHWTSTAMP, &hwtstamp) with HWTSTAMP_TX_ON
setsockopt(sock, SOL_SOCKET, SO_TIMESTAMP, &temp, sizeof(int))
so_timestamping_flags = SOF_TIMESTAMPING_TX_HARDWARE |
SOF_TIMESTAMPING_RX_HARDWARE | SOF_TIMESTAMPING_SYS_HARDWARE;
setsockopt(sock, SOL_SOCKET, SO_TIMESTAMPING, &so_timestamping_flags,
sizeof(so_timestamping_flags))
Can you give me a hint how it works as wanted?
Does the 82576 place the timestamps (only) in ptp packets?
The offset in the packets is not always the same - how is this handled?
Looking forward to your answer I say thank you.
Kind regards
Stefan Plank
Development
Siemens Enterprise Communications GmbH & Co. KG
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