freebsd with flexible iflib nic queues
c6f810c6a4
TX ring according to what the firmware requires. The firmware requires A-MPDU sub-frames to be at a very specific ring offset - that is, the ring slot offset should be (seqno % 256.) This holds for every NIC I've tested thus far except the 4965, which starts erroring out here shortly before the firmware panics. Which is good, it's doing what it's supposed to (read: capture that we've screwed up somewhere.) The specifics about getting this stuff right: * the initial seqno allocation should match up with the ringid. * .. yes, this means we can start at a ring offset that isn't zero. * .. because we program the start seqno in the firmware message to setup the AC. * The initial seqno allocation may be non-zero _and_ frames may be being transmitted during a-mpdu negotiation. I faced similar issues on ath(4) and had to software queue frames to that node+TID during A-MPDU negotiation. * seqno allocation should be in lockstep with ring increments. * If we fail to transmit some segment, no, we shouldn't reuse that ring slot. We should just transmit a BAR (which we aren't yet doing, sigh) and move onto the next seqno. * In theory there shouldn't be any holes in the seqno space when we are transmitting frames. Tested: * 4965 (throws problems, so yes we have to fix this); * 5100 (seems ok); * 6200 (seems ok); * 2200 (seems ok); * 2230 (seems ok). |
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| crypto | ||
| etc | ||
| games | ||
| gnu | ||
| include | ||
| kerberos5 | ||
| lib | ||
| libexec | ||
| release | ||
| rescue | ||
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| secure | ||
| share | ||
| sys | ||
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| tools | ||
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| COPYRIGHT | ||
| LOCKS | ||
| MAINTAINERS | ||
| Makefile | ||
| Makefile.inc1 | ||
| ObsoleteFiles.inc | ||
| README | ||
| UPDATING | ||
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