freebsd kernel with SKQ
32346ec843
802.11 mbufs. The raw transmit path currently doesn't make it easy to queue these frames: * there's no node reference stored in the mbuf, like for the normal path, and * the bpf supplied raw transmit parameters (rate, rts/cts, etc) are passed in as an argument, not as an mbuf tag. In order to support driver queuing of these frames, we need to be able to put the above into the mbuf before the driver gets it, so the driver /can/ put it into a queue if needed. Use an mbuf tag and for now just verbatim copy the bpf parameters into it. Later on it may grow to include more options but this will do for now. Why would you want to queue raw frames? Well, in the case of iwn(4), we can't send the firmware frames to transmit before we hear a beacon - the firmware will consider passive channels as unavailable until it hears a beacon. The firmware "passive" channel state is cleared upon each RXON command, which is sent to update association status. So, when we attempt association and authorisation, the RXON command causes the firmware to clear out what it's already seen, and so we have to wait for a beacon before we can transmit. Before people get overly excited - this alone doesn't "fix" 5GHz operation - it just makes it (more) possible. The aim here is to convert all the drivers over to use a raw_xmit() API that doesn't include the node and params - instead they'd get those from the mbuf. Then raw_xmit() becomes just a side-channel version of the normal transmit path for management traffic. MFC after: 2 weeks Sponsored by: Norse Corp, Inc. |
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| cddl | ||
| contrib | ||
| crypto | ||
| etc | ||
| games | ||
| gnu | ||
| include | ||
| kerberos5 | ||
| lib | ||
| libexec | ||
| release | ||
| rescue | ||
| sbin | ||
| secure | ||
| share | ||
| sys | ||
| tests | ||
| tools | ||
| usr.bin | ||
| usr.sbin | ||
| .arcconfig | ||
| .arclint | ||
| 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. See build(7) and 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. See build(7), config(8), and http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html for more information. 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 kernel configuration files reside in the sys/<arch>/conf sub-directory. GENERIC is the default configuration used in release builds. NOTES contains entries and documentation for all possible devices, not just those commonly used. 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. tests Regression tests which can be run by Kyua. See tests/README for additional information. 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