Date: Tue, 2 Jun 2020 14:53:43 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: Gabriel.Moyano@dlr.de Cc: freebsd-net@freebsd.org Subject: Re: HW timestamping e1000 Message-ID: <20200602115343.GO48478@kib.kiev.ua> In-Reply-To: <798afa552a794a0f9c07aa2fca422ea3@dlr.de> References: <798afa552a794a0f9c07aa2fca422ea3@dlr.de>
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On Tue, Jun 02, 2020 at 10:46:00AM +0000, Gabriel.Moyano@dlr.de wrote: > Hi everybody, > > Currently I am writing a piece of code to test HW timestamping on e1000 during reception, which runs on FreeBSD 12, but unfortunately it seems that it isn't working. > > The socket is created and configured as follows: > > sockfd = socket(AF_INET, SOCK_DGRAM, 0); > int on = 1; > setsockopt(sockfd, SOL_SOCKET, SO_TIMESTAMP, &on, sizeof(on)); > > After recvmsg() is called, cmsg_type of received control messages are printed out with help of the control message routines (https://www.freebsd.org/cgi/man.cgi?query=CMSG_DATA). SCM_TIME_INFO should be printed out but it's not. > > Is there any configuration missing? Does e1000 support HW timestamping right? > > I will appreciate any help. Hardware timestamping is only implemented for Mellanox ConnectX-4 and hier, and Chelsio Terminators (T4 and newer ?). It might be doable for Intel some cards, but not all of them.
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