mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-15 13:22:55 +00:00
3f6dee9b2a
This patch fixes typos in various Documentation txts. This patch addresses some words starting with the letter 'A'. Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com> Acked-by: Randy Dunlap <rdunlap@xenotime.net> Acked-by: Alan Cox <alan@redhat.com> Signed-off-by: Adrian Bunk <bunk@stusta.de>
211 lines
8.8 KiB
Plaintext
211 lines
8.8 KiB
Plaintext
Linux and the 3Com EtherLink III Series Ethercards (driver v1.18c and higher)
|
|
----------------------------------------------------------------------------
|
|
|
|
This file contains the instructions and caveats for v1.18c and higher versions
|
|
of the 3c509 driver. You should not use the driver without reading this file.
|
|
|
|
release 1.0
|
|
28 February 2002
|
|
Current maintainer (corrections to):
|
|
David Ruggiero <jdr@farfalle.com>
|
|
|
|
----------------------------------------------------------------------------
|
|
|
|
(0) Introduction
|
|
|
|
The following are notes and information on using the 3Com EtherLink III series
|
|
ethercards in Linux. These cards are commonly known by the most widely-used
|
|
card's 3Com model number, 3c509. They are all 10mb/s ISA-bus cards and shouldn't
|
|
be (but sometimes are) confused with the similarly-numbered PCI-bus "3c905"
|
|
(aka "Vortex" or "Boomerang") series. Kernel support for the 3c509 family is
|
|
provided by the module 3c509.c, which has code to support all of the following
|
|
models:
|
|
|
|
3c509 (original ISA card)
|
|
3c509B (later revision of the ISA card; supports full-duplex)
|
|
3c589 (PCMCIA)
|
|
3c589B (later revision of the 3c589; supports full-duplex)
|
|
3c529 (MCA)
|
|
3c579 (EISA)
|
|
|
|
Large portions of this documentation were heavily borrowed from the guide
|
|
written the original author of the 3c509 driver, Donald Becker. The master
|
|
copy of that document, which contains notes on older versions of the driver,
|
|
currently resides on Scyld web server: http://www.scyld.com/network/3c509.html.
|
|
|
|
|
|
(1) Special Driver Features
|
|
|
|
Overriding card settings
|
|
|
|
The driver allows boot- or load-time overriding of the card's detected IOADDR,
|
|
IRQ, and transceiver settings, although this capability shouldn't generally be
|
|
needed except to enable full-duplex mode (see below). An example of the syntax
|
|
for LILO parameters for doing this:
|
|
|
|
ether=10,0x310,3,0x3c509,eth0
|
|
|
|
This configures the first found 3c509 card for IRQ 10, base I/O 0x310, and
|
|
transceiver type 3 (10base2). The flag "0x3c509" must be set to avoid conflicts
|
|
with other card types when overriding the I/O address. When the driver is
|
|
loaded as a module, only the IRQ and transceiver setting may be overridden.
|
|
For example, setting two cards to 10base2/IRQ10 and AUI/IRQ11 is done by using
|
|
the xcvr and irq module options:
|
|
|
|
options 3c509 xcvr=3,1 irq=10,11
|
|
|
|
|
|
(2) Full-duplex mode
|
|
|
|
The v1.18c driver added support for the 3c509B's full-duplex capabilities.
|
|
In order to enable and successfully use full-duplex mode, three conditions
|
|
must be met:
|
|
|
|
(a) You must have a Etherlink III card model whose hardware supports full-
|
|
duplex operations. Currently, the only members of the 3c509 family that are
|
|
positively known to support full-duplex are the 3c509B (ISA bus) and 3c589B
|
|
(PCMCIA) cards. Cards without the "B" model designation do *not* support
|
|
full-duplex mode; these include the original 3c509 (no "B"), the original
|
|
3c589, the 3c529 (MCA bus), and the 3c579 (EISA bus).
|
|
|
|
(b) You must be using your card's 10baseT transceiver (i.e., the RJ-45
|
|
connector), not its AUI (thick-net) or 10base2 (thin-net/coax) interfaces.
|
|
AUI and 10base2 network cabling is physically incapable of full-duplex
|
|
operation.
|
|
|
|
(c) Most importantly, your 3c509B must be connected to a link partner that is
|
|
itself full-duplex capable. This is almost certainly one of two things: a full-
|
|
duplex-capable Ethernet switch (*not* a hub), or a full-duplex-capable NIC on
|
|
another system that's connected directly to the 3c509B via a crossover cable.
|
|
|
|
/////Extremely important caution concerning full-duplex mode/////
|
|
Understand that the 3c509B's hardware's full-duplex support is much more
|
|
limited than that provide by more modern network interface cards. Although
|
|
at the physical layer of the network it fully supports full-duplex operation,
|
|
the card was designed before the current Ethernet auto-negotiation (N-way)
|
|
spec was written. This means that the 3c509B family ***cannot and will not
|
|
auto-negotiate a full-duplex connection with its link partner under any
|
|
circumstances, no matter how it is initialized***. If the full-duplex mode
|
|
of the 3c509B is enabled, its link partner will very likely need to be
|
|
independently _forced_ into full-duplex mode as well; otherwise various nasty
|
|
failures will occur - at the very least, you'll see massive numbers of packet
|
|
collisions. This is one of very rare circumstances where disabling auto-
|
|
negotiation and forcing the duplex mode of a network interface card or switch
|
|
would ever be necessary or desirable.
|
|
|
|
|
|
(3) Available Transceiver Types
|
|
|
|
For versions of the driver v1.18c and above, the available transceiver types are:
|
|
|
|
0 transceiver type from EEPROM config (normally 10baseT); force half-duplex
|
|
1 AUI (thick-net / DB15 connector)
|
|
2 (undefined)
|
|
3 10base2 (thin-net == coax / BNC connector)
|
|
4 10baseT (RJ-45 connector); force half-duplex mode
|
|
8 transceiver type and duplex mode taken from card's EEPROM config settings
|
|
12 10baseT (RJ-45 connector); force full-duplex mode
|
|
|
|
Prior to driver version 1.18c, only transceiver codes 0-4 were supported. Note
|
|
that the new transceiver codes 8 and 12 are the *only* ones that will enable
|
|
full-duplex mode, no matter what the card's detected EEPROM settings might be.
|
|
This insured that merely upgrading the driver from an earlier version would
|
|
never automatically enable full-duplex mode in an existing installation;
|
|
it must always be explicitly enabled via one of these code in order to be
|
|
activated.
|
|
|
|
|
|
(4a) Interpretation of error messages and common problems
|
|
|
|
Error Messages
|
|
|
|
eth0: Infinite loop in interrupt, status 2011.
|
|
These are "mostly harmless" message indicating that the driver had too much
|
|
work during that interrupt cycle. With a status of 0x2011 you are receiving
|
|
packets faster than they can be removed from the card. This should be rare
|
|
or impossible in normal operation. Possible causes of this error report are:
|
|
|
|
- a "green" mode enabled that slows the processor down when there is no
|
|
keyboard activity.
|
|
|
|
- some other device or device driver hogging the bus or disabling interrupts.
|
|
Check /proc/interrupts for excessive interrupt counts. The timer tick
|
|
interrupt should always be incrementing faster than the others.
|
|
|
|
No received packets
|
|
If a 3c509, 3c562 or 3c589 can successfully transmit packets, but never
|
|
receives packets (as reported by /proc/net/dev or 'ifconfig') you likely
|
|
have an interrupt line problem. Check /proc/interrupts to verify that the
|
|
card is actually generating interrupts. If the interrupt count is not
|
|
increasing you likely have a physical conflict with two devices trying to
|
|
use the same ISA IRQ line. The common conflict is with a sound card on IRQ10
|
|
or IRQ5, and the easiest solution is to move the 3c509 to a different
|
|
interrupt line. If the device is receiving packets but 'ping' doesn't work,
|
|
you have a routing problem.
|
|
|
|
Tx Carrier Errors Reported in /proc/net/dev
|
|
If an EtherLink III appears to transmit packets, but the "Tx carrier errors"
|
|
field in /proc/net/dev increments as quickly as the Tx packet count, you
|
|
likely have an unterminated network or the incorrect media transceiver selected.
|
|
|
|
3c509B card is not detected on machines with an ISA PnP BIOS.
|
|
While the updated driver works with most PnP BIOS programs, it does not work
|
|
with all. This can be fixed by disabling PnP support using the 3Com-supplied
|
|
setup program.
|
|
|
|
3c509 card is not detected on overclocked machines
|
|
Increase the delay time in id_read_eeprom() from the current value, 500,
|
|
to an absurdly high value, such as 5000.
|
|
|
|
|
|
(4b) Decoding Status and Error Messages
|
|
|
|
The bits in the main status register are:
|
|
|
|
value description
|
|
0x01 Interrupt latch
|
|
0x02 Tx overrun, or Rx underrun
|
|
0x04 Tx complete
|
|
0x08 Tx FIFO room available
|
|
0x10 A complete Rx packet has arrived
|
|
0x20 A Rx packet has started to arrive
|
|
0x40 The driver has requested an interrupt
|
|
0x80 Statistics counter nearly full
|
|
|
|
The bits in the transmit (Tx) status word are:
|
|
|
|
value description
|
|
0x02 Out-of-window collision.
|
|
0x04 Status stack overflow (normally impossible).
|
|
0x08 16 collisions.
|
|
0x10 Tx underrun (not enough PCI bus bandwidth).
|
|
0x20 Tx jabber.
|
|
0x40 Tx interrupt requested.
|
|
0x80 Status is valid (this should always be set).
|
|
|
|
|
|
When a transmit error occurs the driver produces a status message such as
|
|
|
|
eth0: Transmit error, Tx status register 82
|
|
|
|
The two values typically seen here are:
|
|
|
|
0x82
|
|
Out of window collision. This typically occurs when some other Ethernet
|
|
host is incorrectly set to full duplex on a half duplex network.
|
|
|
|
0x88
|
|
16 collisions. This typically occurs when the network is exceptionally busy
|
|
or when another host doesn't correctly back off after a collision. If this
|
|
error is mixed with 0x82 errors it is the result of a host incorrectly set
|
|
to full duplex (see above).
|
|
|
|
Both of these errors are the result of network problems that should be
|
|
corrected. They do not represent driver malfunction.
|
|
|
|
|
|
(5) Revision history (this file)
|
|
|
|
28Feb02 v1.0 DR New; major portions based on Becker original 3c509 docs
|
|
|