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-
-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
-