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Adrian Chadd 67aaf73997 Modify the RX path to keep the previous RX descriptor around once it's
used.

It turns out that the RX DMA engine does the same last-descriptor-link-
pointer-re-reading trick that the TX DMA engine.  That is, the hardware
re-reads the link pointer before it moves onto the next descriptor.
Thus we can't free a descriptor before we move on; it's possible the
hardware will need to re-read the link pointer before we overwrite
it with a new one.

Tested:

* AR5416, STA mode

TODO:

* more thorough AP and STA mode testing!
* test on other pre-AR9380 NICs, just to be sure.
* Break out the RX descriptor grabbing bits from the RX completion
  bits, like what is done in the RX EDMA code, so ..
* .. the RX lock can be held during ath_rx_proc(), but not across
  packet input.
2014-05-06 01:15:42 +00:00
bin Minor comment fix: dbsz is the block size as set by bs/ibs/obs, 2014-05-03 09:07:02 +00:00
cddl Remove a duplicate definition. 2014-05-04 03:37:39 +00:00
contrib - Add J command to help. 2014-05-02 23:47:14 +00:00
crypto Fix OpenSSL use-after-free vulnerability. 2014-04-30 04:02:36 +00:00
etc Remove the ifconfig test added in rev 263445. After discussion with 2014-05-05 19:38:29 +00:00
games Add placeholder Kyuafiles for various top-level hierarchies. 2014-04-21 21:39:25 +00:00
gnu Spell NO_PROFILE= as MK_PROFILE=no. 2014-04-25 19:25:26 +00:00
include langinfo.h: Hide YESSTR and NOSTR in strict POSIX mode. 2014-04-19 12:38:01 +00:00
kerberos5 Use MK_OPENLDAP in preference to WITH_OPENLDAP and make it a default 2014-04-24 23:17:31 +00:00
lib Revert r265367: 2014-05-05 18:04:57 +00:00
libexec Fix releasing the lock in the parent atrun process after the queue 2014-04-17 16:00:26 +00:00
release Use 'return' instead of 'exit' in main(), since the script exits 2014-05-05 23:36:46 +00:00
rescue - Fix build WITHOUT_ZFS/WITHOUT_CDDL after r265229, bin/ps needs libjail. 2014-05-02 20:45:34 +00:00
sbin Remove the ifconfig test added in rev 263445. After discussion with 2014-05-05 19:38:29 +00:00
secure Fix order of libthr and libc in the global dso list for sshd, by 2014-04-27 05:28:14 +00:00
share Simplify use of the semi-bogus EARLY_BUILD variable. Also, simplify 2014-05-05 22:03:08 +00:00
sys Modify the RX path to keep the previous RX descriptor around once it's 2014-05-06 01:15:42 +00:00
tests Add regression test for PR kern/189088. 2014-04-29 15:12:23 +00:00
tools Add appropriate quoting to allow building with a KERNCONFDIR containing 2014-05-03 09:24:20 +00:00
usr.bin - Remove net.inet.tcp.reass.overflows sysctl. It counts exactly 2014-05-06 00:00:07 +00:00
usr.sbin Disable the 'uart_drain()' callback when the emulated receive FIFO is full. 2014-05-05 23:54:13 +00:00
COPYRIGHT Bump copyright year. 2013-12-31 12:18:10 +00:00
LOCKS Explicitly require Security Officer's approval for kernel PRNG bits. 2013-09-17 14:19:05 +00:00
MAINTAINERS This should have been obvious, but make it so. 2014-04-06 16:48:00 +00:00
Makefile Omit from the universe build all config files tagged with 2014-04-30 18:02:10 +00:00
Makefile.inc1 Add appropriate quoting to allow building with a KERNCONFDIR containing 2014-05-03 09:24:20 +00:00
ObsoleteFiles.inc Remove the ifconfig test added in rev 263445. After discussion with 2014-05-05 19:38:29 +00:00
README
UPDATING lindev(4): remove the device 2014-05-02 05:30:49 +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