freebsd with flexible iflib nic queues
78dda2ae0c
driver seems relatively functional, but could use some souping up, particularly in the performance area. This has both NetBSD and FreeBSD attachment code and a fair amount of effort has been put into making it easy to port to different *BSD platforms. The basic design is a one tfd per mbuf transmit (with no transmit related interrupts- tfds are gc'd as needed). The receive ring uses a 2K buffer per rfd with a +2 byte adjust for the ethernet header (so the payload is aligned). There's support that *almost* works for doing large packets- the rfd chaining code works, but there's some problem with getting good checksums at the IP reassembly level (ditto for doing short tfd's too). The chip has support for TCP checksums insertion for transmit and TCP checksum calculation on receive (for both you have to do some appropriate backoff && twiddling), but this isn't in place. This is nearly entirely reverse engineered from the released Intel driver, so there's a lot of "We have to do this but do not know why" stuff. There is somebody who has the chip specs who works in FreeBSD but they're being a bit standoffish about even sharing hints which is somewhat annoying. It's also apparent that all I had to work with were the first rev boards. This driver has been lightly tested on intel && alpha, but only point-to-point. There may be some issues with switches- use of boot time environment variables that override EEPROM settings (e.g., 'set wx_ilos=1' which inverts the sense of optical signal loss) may help with this. I had this out for review for three weeks, and nobody said anything negative or positive, ergo, this checkin has no 'reviewed by' field which I would have preferred. |
||
|---|---|---|
| bin | ||
| contrib | ||
| crypto | ||
| etc | ||
| games | ||
| gnu | ||
| include | ||
| kerberos5 | ||
| kerberosIV | ||
| lib | ||
| libexec | ||
| release | ||
| sbin | ||
| secure | ||
| share | ||
| sys | ||
| tools | ||
| usr.bin | ||
| usr.sbin | ||
| COPYRIGHT | ||
| Makefile | ||
| Makefile.inc0 | ||
| Makefile.inc1 | ||
| Makefile.upgrade | ||
| 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 and the contents of /etc. 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 with config(8) is a somewhat more involved process, documentation for which can be found at: http://www.freebsd.org/handbook/kernelconfig.html And in the config(8) man page. The sample kernel configuration files reside in the sys/i386/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 LINT contains entries for all possible devices, not just those commonly used, and is meant more as a general reference than an actual kernel configuration file (a kernel built from it wouldn't even run). Source Roadmap: --------------- bin System/User commands. contrib Packages contributed by 3rd parties. crypto Export controlled 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. kerberosIV Kerberos package. lib System libraries. libexec System daemons. release Release building Makefile & associated tools. sbin System commands. secure DES and DES-related utilities - NOT FOR EXPORT! 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/handbook/synching.html