freebsd kernel with SKQ
Go to file
Adrian Chadd bc0203e201 Fix antenna configuration, microcode version checks and rate selection
in preparation for the 5300 3x3 NIC.

During this particular adventure, I did indeed discover that a whole
swath of things made little to no sense.

Those included, and are fixed here:

* A lot of the antenna configuration bits assume the NIC has two receive
  chains.  That's blatantly untrue for NICs that don't.
* There was some disconnect between the antenna configuration when
  forming a PLCP rate DWORD (which includes the transmit antenna
  configuration), separate to the link quality antenna configuration.

  So now there's helper functions to return which antenna configurations
  to use and those are used wherever an antenna config is required.

* The 5300 does up to three stream TX/RX (so MCS0->23), however
  the link quality table has only 16 slots.  This means all of the
  rate entries are .. well, dual-stream rates.  If this is the case,
  the "last MIMO" parameter can't be 16 or it panics the firmware.
  Set it to 15.

* .. and since yes it has 16 slots, it only would try retransmitting
  from MCS8->MCS23, which can be quite .. terrible.  Hard-code the last
  two retry slots to be the lowest configured rate.

* I noticed some transmit configuration command stuff is different
  based on firmware API version, so I lifted that code from Linux.

* Add / augment some more logging to make it easier to capture this
  stuff.

Now, 3x3 is still terrible because the link quality configuration is
plainly not good enough.  I'll have to think about that.
However, the original goal of this - 3x3 operation on the Intel
5300 NIC - actually worked.

There are also rate control bugs in the way this driver handles
notifying the net80211 rate control code when AMPDU is enabled.
It always steps the rate up to the maximum rate possible - and
this eventually ends in much sadness.  I'll fix that later.

As a side note - 2GHz HT40 now works on all the NICs I have tested.

As a second side note - this exposed some bad 3x3 behaviour in
the ath(4) rate control code where it starts off at a 3-stream rate
and doesn't downgrade quickly enough.  This makes the initial
dhcp exchange take a long time.  I'll fix the ath(4) rate code
to start at a low fixed 1x1 MCS rate and step up if everything
works out.

Tested:

* Intel 2200
* Intel 2230
* Intel 5300
* Intel 5100
* Intel 6205
* Intel 100

TODO:

* Test the other NICs more thoroughly!

Thank you to Michael Kosarev <russiane39@gmail.com> for donating the
Intel 5300 NIC and pestering me about it since last year to try and
make it all work.
2014-08-28 03:18:27 +00:00
bin Always check the limits of array index variables before using them. 2014-08-21 02:40:33 +00:00
cddl MFV r270197: 2014-08-22 22:13:36 +00:00
contrib MFV of r270725, tzdata2014f 2014-08-27 19:26:35 +00:00
crypto Merge OpenSSL 1.0.1i. 2014-08-07 18:56:10 +00:00
etc - Use $local_startup to load rc.conf.d/* scripts. 2014-08-27 09:19:22 +00:00
games Update the freebsd-tips example to use drill instead of dig since bind is no longer in base 2014-07-25 14:47:44 +00:00
gnu Add gnugrep.1 to CLEANFILES. 2014-08-26 19:36:34 +00:00
include Add guards to ptrdiff_t definition in include/stddef.h 2014-08-21 15:10:10 +00:00
kerberos5 Revert r267233 for now. PIE support needs to be reworked. 2014-08-19 15:04:32 +00:00
lib The standard we compile libc++ with is called c++11 not c++0x. 2014-08-25 08:40:36 +00:00
libexec Remove stray newline. 2014-08-27 00:48:09 +00:00
release Wrap a long line. 2014-08-24 12:51:34 +00:00
rescue Add zdb into rescue environment. 2014-08-20 00:14:41 +00:00
sbin Correct the destroy example. The -n argument is not needed (and is not 2014-08-27 17:44:59 +00:00
secure Fix typo (LIBLDNSADD -> LIBLDNS) to fix "make checkdpadd" 2014-08-19 18:27:43 +00:00
share Fix comments on updating tzdata releases. 2014-08-27 19:34:49 +00:00
sys Fix antenna configuration, microcode version checks and rate selection 2014-08-28 03:18:27 +00:00
tests Numerous small fixes, mostly suggested by Coverity. 2014-08-20 16:59:33 +00:00
tools add scripts for generating a diff from p4... 2014-08-27 18:56:12 +00:00
usr.bin Clarify that the -c argument clears the list of tracepoints specified by 2014-08-26 21:21:57 +00:00
usr.sbin Allow mailwrapper to use mailer.conf from localbase (respecting LOCALBASE env var if set) 2014-08-26 22:20:02 +00:00
.arcconfig Update the URL to the phabricator instance. 2014-08-14 16:25:43 +00:00
.arclint arc: add linting for python files 2014-06-02 00:21:42 +00:00
COPYRIGHT Bump copyright year. 2013-12-31 12:18:10 +00:00
LOCKS
MAINTAINERS add myself as opencrypto maintainer as I'm doing some work in the 2014-08-11 19:03:20 +00:00
Makefile Create the native-xtools target. This target creates only the cross 2014-08-18 21:04:44 +00:00
Makefile.inc1 Revert r267233 for now. PIE support needs to be reworked. 2014-08-19 15:04:32 +00:00
ObsoleteFiles.inc Catch up to gcc 3.3 -> 3.4 upgrade. 2014-08-24 21:21:54 +00:00
README Import OpenSSL 1.0.1i. 2014-08-07 16:49:55 +00:00
UPDATING Make mmap() of the console device when using ofwfb work like other supported 2014-07-29 23:11:05 +00:00

This is the top level of the FreeBSD source directory.  This file
was last revised on:
$FreeBSD$

For copyright information, please see the file COPYRIGHT in this
directory (additional copyright information also exists for some
sources in this tree - please see the specific source directories for
more information).

The Makefile in this directory supports a number of targets for
building components (or all) of the FreeBSD source tree, the most
commonly used one being ``world'', which rebuilds and installs
everything in the FreeBSD system from the source tree except the
kernel, the kernel-modules and the contents of /etc.  The ``world''
target should only be used in cases where the source tree has not
changed from the currently running version.  See:
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html
for more information, including setting make(1) variables.

The ``buildkernel'' and ``installkernel'' targets build and install
the kernel and the modules (see below).  Please see the top of
the Makefile in this directory for more information on the
standard build targets and compile-time flags.

Building a kernel is a somewhat more involved process, documentation
for which can be found at:
   http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html
And in the config(8) man page.
Note: If you want to build and install the kernel with the
``buildkernel'' and ``installkernel'' targets, you might need to build
world before.  More information is available in the handbook.

The sample kernel configuration files reside in the sys/<arch>/conf
sub-directory (assuming that you've installed the kernel sources), the
file named GENERIC being the one used to build your initial installation
kernel.  The file NOTES contains entries and documentation for all possible
devices, not just those commonly used.  It is the successor of the ancient
LINT file, but in contrast to LINT, it is not buildable as a kernel but a
pure reference and documentation file.


Source Roadmap:
---------------
bin		System/user commands.

cddl		Various commands and libraries under the Common Development
		and Distribution License.

contrib		Packages contributed by 3rd parties.

crypto		Cryptography stuff (see crypto/README).

etc		Template files for /etc.

games		Amusements.

gnu		Various commands and libraries under the GNU Public License.
		Please see gnu/COPYING* for more information.

include		System include files.

kerberos5	Kerberos5 (Heimdal) package.

lib		System libraries.

libexec		System daemons.

release		Release building Makefile & associated tools.

rescue		Build system for statically linked /rescue utilities.

sbin		System commands.

secure		Cryptographic libraries and commands.

share		Shared resources.

sys		Kernel sources.

tools		Utilities for regression testing and miscellaneous tasks.

usr.bin		User commands.

usr.sbin	System administration commands.


For information on synchronizing your source tree with one or more of
the FreeBSD Project's development branches, please see:

  http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/synching.html