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ntp: add support for HW timestamping on Linux

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Add a new directive to specify interfaces which should be used for HW
timestamping. Extend the Linux ntp_io initialization to enable HW
timestamping, configure the RX filter using the SIOCSHWTSTAMP ioctl,
open their PHC devices, and track them as hwclock instances. When
messages with HW timestamps are received, use the PTP_SYS_OFFSET ioctl
to make PHC samples for hwclock.
This commit is contained in:
Miroslav Lichvar
2016-10-24 12:44:59 +02:00
parent 4449259d88
commit 14a1059e43
5 changed files with 263 additions and 8 deletions
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12
configure vendored
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@@ -101,7 +101,7 @@ For better control, use the options below.
--disable-asyncdns Disable asynchronous name resolving
--disable-forcednsretry Don't retry on permanent DNS error
--without-clock-gettime Don't use clock_gettime() even if it is available
--disable-timestamping Disable support for SW timestamping
--disable-timestamping Disable support for SW/HW timestamping
--enable-ntp-signd Enable support for MS-SNTP authentication in Samba
--with-ntp-era=SECONDS Specify earliest assumed NTP time in seconds
since 1970-01-01 [50*365 days ago]
@@ -642,16 +642,16 @@ else
fi
if [ $feat_timestamping = "1" ] && [ $try_timestamping = "1" ] &&
test_code 'SW timestamping' 'sys/types.h sys/socket.h linux/net_tstamp.h
linux/errqueue.h' '' '' '
test_code 'SW/HW timestamping' 'sys/types.h sys/socket.h linux/net_tstamp.h
linux/errqueue.h linux/ptp_clock.h' '' '' '
int val = SOF_TIMESTAMPING_SOFTWARE | SOF_TIMESTAMPING_RX_SOFTWARE |
SOF_TIMESTAMPING_OPT_CMSG;
return sizeof (struct scm_timestamping) + SCM_TSTAMP_SND +
SOF_TIMESTAMPING_RAW_HARDWARE | SOF_TIMESTAMPING_OPT_CMSG;
return sizeof (struct scm_timestamping) + SCM_TSTAMP_SND + PTP_SYS_OFFSET +
setsockopt(0, SOL_SOCKET, SO_SELECT_ERR_QUEUE + SO_TIMESTAMPING,
&val, sizeof (val));'
then
add_def HAVE_LINUX_TIMESTAMPING
EXTRA_OBJECTS="$EXTRA_OBJECTS ntp_io_linux.o"
EXTRA_OBJECTS="$EXTRA_OBJECTS hwclock.o ntp_io_linux.o"
fi
timepps_h=""