f5f9b2ee23
1. Create 2 x 8k transmit buffer blocks in place of the 16k block previously. With this change the speed as tested with ttcp on a 2Mbit link went up from 206kbyte/s to 236kbyte/s. 2. Change the rest of the functions to also have the definition of the return value on a sepperate line. 3. Remove some unused variables. 4. Add code to recover from DMA underruns. 5. Reorder ar_get_packets() to handle errors better. 6. Only allocate a mbuf cluster if the data is more than the mbuf. (and in a second diff in addition to the above) 7. Stops the occasional DMA underruns that occurred when 2 channels are running at 2Mbit/s. Submitted by: John Hay <jhay@mikom.csir.co.za>
$Id: README.le,v 1.1 1994/10/01 20:15:43 wollman Exp $ ---------------- This driver is in no way supported by Digital Equipment. See the disclaimers in the sources for more. This driver supports all the DEC EtherWORKS III NICs (DE203, DE204, and DE205) and the later DEC EtherWORKS II NICs (DE200, DE201, DE202, DE422). DEPCA-style boards prior to the DE200 have not been tested and may not work. This driver is not EISA aware. If you are using a DE422 or have configured the EtherWORKS III in EISA mode, make sure you specify the I/O port properly as this driver will *not* probe for it. (The I/O port should be 0xNc00 where N is the EISA slot number). This driver does not yet use the full 128KB allowed by the DE422. Someday, it might. For EtherWORKS III NICs, the driver will override the EEPROM setting of MemoryMode and *always* use the 2K for best results. The driver includes full support for both BPF and IP Multicast. [All paths are relative to the top of sys source area, usually /usr/src/sys.] The following files need to be moved into their respective directories: if_le.c --> i386/isa am7990.h --> i386/isa/ic lemac.h --> i386/isa/ic You will need to apply the patch provided in pat.files.i386 to i386/conf/files.i386 file. After that is done you will need to edit your config file (in i386/conf) and a line similar to: device le0 at isa? port 0x300 net irq 5 iomem 0xd0000 vector le_intr [The above line assumes the board is still at the factory defaults.] Change the port, irq, and iomem value if needed to your configuration. Now you are ready to rebuild your kernel, reboot, and see if the driver can configure your board. When the system boots, you will hopefully something close to: EtherWORKS II: le0 at 0x300-0x30f irq 5 maddr 0xd0000 msize 65536 on isa le0: DE202 ethernet address 08:00:2b:2d:c8:45 bpf: le0 attached EtherWORKS III: le0 at 0x320-0x33f irq 5 maddr 0xd0000 msize 2048 on isa le0: DE205-AB ethernet address 08:00:2b:bb:23:e0 le0 attached in the startup log. If so, the board configured properly and should be ready to use. -- Mail: thomas@lkg.dec.com URL: http://ftp.digital.com/~thomas/