4
0
mirror of git://sourceware.org/git/newlib-cygwin.git synced 2025-02-21 16:26:12 +08:00
kib 7ff81234c4 Add a place for a driver to report rx timestamps
in nanoseconds from boot for the received packets.

The rcv_tstmp field overlaps the place of Ln header length indicators,
not used by received packets.  The basic pkthdr rearrangement change
in sys/mbuf.h was provided by gallatin.

There are two accompanying M_ flags: M_TSTMP means that there is the
timestamp (and it was generated by hardware).

Another flag M_TSTMP_HPREC indicates that the timestamp is
high-precision.  Practically M_TSTMP_HPREC means that hardware
provided additional precision comparing with the stamps when the flag
is not set.  E.g., for ConnectX all packets are stamped by hardware
when PCIe transaction to write out the completion descriptor is
performed, but PTP packet are stamped on port.  For Intel cards, when
PTP assist is enabled, only PTP packets are stamped in the limited
number of registers, so if Intel cards ever start support this
mechanism, they would always set M_TSTMP | M_TSTMP_HPREC if hardware
timestamp is present for the given packet.

Add IFCAP_HWRXTSTMP interface capability to indicate the support for
hardware rx timestamping, and ifconfig(8) command to toggle it.

Based on the patch by:	gallatin
Reviewed by:	gallatin (previous version), hselasky
Sponsored by:	Mellanox Technologies
MFC after:	2 weeks (? mbuf KBI issue)
X-Differential revision:	https://reviews.freebsd.org/D12638
2018-08-24 15:00:02 +02:00
2016-06-23 15:54:55 -04:00
2016-06-23 15:54:55 -04:00
2015-03-09 20:53:11 +01:00
2016-06-23 15:54:55 -04:00
2016-03-22 10:25:20 +01:00
2016-03-22 10:25:20 +01:00
2018-07-06 10:46:43 +02:00
2016-03-22 10:25:20 +01:00
2016-03-22 10:25:20 +01:00
2016-03-22 10:25:20 +01:00
2016-03-22 10:25:20 +01:00
2010-01-09 21:11:32 +00:00
2014-02-05 13:17:47 +00:00
2010-01-09 21:11:32 +00:00
2010-01-09 21:11:32 +00:00
2016-06-23 15:54:55 -04:00
2016-03-22 10:25:20 +01:00
2016-03-22 10:25:20 +01:00
2016-03-22 10:25:20 +01:00

		   README for GNU development tools

This directory contains various GNU compilers, assemblers, linkers, 
debuggers, etc., plus their support routines, definitions, and documentation.

If you are receiving this as part of a GDB release, see the file gdb/README.
If with a binutils release, see binutils/README;  if with a libg++ release,
see libg++/README, etc.  That'll give you info about this
package -- supported targets, how to use it, how to report bugs, etc.

It is now possible to automatically configure and build a variety of
tools with one command.  To build all of the tools contained herein,
run the ``configure'' script here, e.g.:

	./configure 
	make

To install them (by default in /usr/local/bin, /usr/local/lib, etc),
then do:
	make install

(If the configure script can't determine your type of computer, give it
the name as an argument, for instance ``./configure sun4''.  You can
use the script ``config.sub'' to test whether a name is recognized; if
it is, config.sub translates it to a triplet specifying CPU, vendor,
and OS.)

If you have more than one compiler on your system, it is often best to
explicitly set CC in the environment before running configure, and to
also set CC when running make.  For example (assuming sh/bash/ksh):

	CC=gcc ./configure
	make

A similar example using csh:

	setenv CC gcc
	./configure
	make

Much of the code and documentation enclosed is copyright by
the Free Software Foundation, Inc.  See the file COPYING or
COPYING.LIB in the various directories, for a description of the
GNU General Public License terms under which you can copy the files.

REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info
on where and how to report problems.
Description
No description provided
Readme 156 MiB
Languages
C 61.5%
Makefile 19.6%
C++ 10.4%
Assembly 4.9%
M4 1%
Other 2.4%