mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-25 10:59:05 +00:00
25985edced
Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
80 lines
3.6 KiB
Plaintext
80 lines
3.6 KiB
Plaintext
|
|
IBM PCI Pit/Pit-Phy/Olympic CHIPSET BASED TOKEN RING CARDS README
|
|
|
|
Release 0.2.0 - Release
|
|
June 8th 1999 Peter De Schrijver & Mike Phillips
|
|
Release 0.9.C - Release
|
|
April 18th 2001 Mike Phillips
|
|
|
|
Thanks:
|
|
Erik De Cock, Adrian Bridgett and Frank Fiene for their
|
|
patience and testing.
|
|
Donald Champion for the cardbus support
|
|
Kyle Lucke for the dma api changes.
|
|
Jonathon Bitner for hardware support.
|
|
Everybody on linux-tr for their continued support.
|
|
|
|
Options:
|
|
|
|
The driver accepts four options: ringspeed, pkt_buf_sz,
|
|
message_level and network_monitor.
|
|
|
|
These options can be specified differently for each card found.
|
|
|
|
ringspeed: Has one of three settings 0 (default), 4 or 16. 0 will
|
|
make the card autosense the ringspeed and join at the appropriate speed,
|
|
this will be the default option for most people. 4 or 16 allow you to
|
|
explicitly force the card to operate at a certain speed. The card will fail
|
|
if you try to insert it at the wrong speed. (Although some hubs will allow
|
|
this so be *very* careful). The main purpose for explicitly setting the ring
|
|
speed is for when the card is first on the ring. In autosense mode, if the card
|
|
cannot detect any active monitors on the ring it will not open, so you must
|
|
re-init the card at the appropriate speed. Unfortunately at present the only
|
|
way of doing this is rmmod and insmod which is a bit tough if it is compiled
|
|
in the kernel.
|
|
|
|
pkt_buf_sz: This is this initial receive buffer allocation size. This will
|
|
default to 4096 if no value is entered. You may increase performance of the
|
|
driver by setting this to a value larger than the network packet size, although
|
|
the driver now re-sizes buffers based on MTU settings as well.
|
|
|
|
message_level: Controls level of messages created by the driver. Defaults to 0:
|
|
which only displays start-up and critical messages. Presently any non-zero
|
|
value will display all soft messages as well. NB This does not turn
|
|
debugging messages on, that must be done by modified the source code.
|
|
|
|
network_monitor: Any non-zero value will provide a quasi network monitoring
|
|
mode. All unexpected MAC frames (beaconing etc.) will be received
|
|
by the driver and the source and destination addresses printed.
|
|
Also an entry will be added in /proc/net called olympic_tr%d, where tr%d
|
|
is the registered device name, i.e tr0, tr1, etc. This displays low
|
|
level information about the configuration of the ring and the adapter.
|
|
This feature has been designed for network administrators to assist in
|
|
the diagnosis of network / ring problems. (This used to OLYMPIC_NETWORK_MONITOR,
|
|
but has now changed to allow each adapter to be configured differently and
|
|
to alleviate the necessity to re-compile olympic to turn the option on).
|
|
|
|
Multi-card:
|
|
|
|
The driver will detect multiple cards and will work with shared interrupts,
|
|
each card is assigned the next token ring device, i.e. tr0 , tr1, tr2. The
|
|
driver should also happily reside in the system with other drivers. It has
|
|
been tested with ibmtr.c running, and I personally have had one Olicom PCI
|
|
card and two IBM olympic cards (all on the same interrupt), all running
|
|
together.
|
|
|
|
Variable MTU size:
|
|
|
|
The driver can handle a MTU size up to either 4500 or 18000 depending upon
|
|
ring speed. The driver also changes the size of the receive buffers as part
|
|
of the mtu re-sizing, so if you set mtu = 18000, you will need to be able
|
|
to allocate 16 * (sk_buff with 18000 buffer size) call it 18500 bytes per ring
|
|
position = 296,000 bytes of memory space, plus of course anything
|
|
necessary for the tx sk_buff's. Remember this is per card, so if you are
|
|
building routers, gateway's etc, you could start to use a lot of memory
|
|
real fast.
|
|
|
|
|
|
6/8/99 Peter De Schrijver and Mike Phillips
|
|
|