> -----Original Message----- > From: Ray Marshall [mailto:ray.marsh...@nxp.com] > Sent: Monday, July 08, 2019 10:39 AM > To: linuxptp-users@lists.sourceforge.net > Subject: [Linuxptp-users] SOF_TIMESTAMPING_TX_SOFTWARE is missing > > Hello, > > Struggling to get PTP working! > > ethtool reports no SOF_TIMESTAMPING_TX_SOFTWARE > ptp4l says the same > > I modified the driver to add a call to skb_tx_timestamp(). > I also added a printk statement to convince myself that function was > being called. > > Yet still ethtool reports no SOF_TIMESTAMPING_TX_SOFTWARE. > > Do I need to add some code in the driver to set some flags to tell > ethtool that software timestamping is enabled? > How does ethtool know SOF_TIMESTAMPING_TX_SOFTWARE is available in the > driver?
You need to make sure that the driver's .get_ts_info function reports SOF_TIMESTAMPING_TX_SOFTWARE. If the driver doesn't support any form of hardware timestamping, there is a convenient helper function you can assign to the driver's .get_ts_info to report the correct value. (ethtool_op_get_ts_info). By default, ethtool reports that software timestamping is not enabled (because it can't know whether or not skb_tx_timestamp is being called at the right place or not). Thanks, Jake > > This ethernet link is actually virtual ethernet that runs over a PCIe > link between 2 devices on the same PCB. In all other respects it > functions just like a normal ethernet link. > Could this be my problem? > > Any pointers would be appreciated > > Ray > > > > _______________________________________________ > Linuxptp-users mailing list > Linuxptp-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/linuxptp-users _______________________________________________ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
