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Diffstat (limited to 'bsps/shared/net/README.open_eth')
| -rw-r--r-- | bsps/shared/net/README.open_eth | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/bsps/shared/net/README.open_eth b/bsps/shared/net/README.open_eth new file mode 100644 index 0000000..af9d888 --- /dev/null +++ b/bsps/shared/net/README.open_eth @@ -0,0 +1,72 @@ +Driver for opencores ethernet MAC - README +------------------------------------------ + +The device name for the driver is 'open_eth1', the attach +function for the leon bsp is rtems_leon_open_eth_driver_attach(). + +No cache flushing is made when a frame is received. On leon, +this means that cache snooping must be configured in the +vhdl model and enabled by software. + +TX interrupts are not used and masked in the interrupt mask +register. + +For now, only 10 Mbit/s half-duplex is supported. +100 Mbit/s operations does not work reliably, the transmitter +locks up or skips frames. Seems to depend on the TX fifo +implementation in the opencores MAC. Send a mail to +jiri@gaisler.com if you know how to fix this. + +Tested only on leon, using the GR-PCI-XC2V board @ 40 MHz. +Output from ttcp receiving 1 Mbyte file: + +>>> ttcp -r -s +ttcp-r: buflen=8192, nbuf=2048, align=16384/0, port=5001 tcp +ttcp-r: socket +ttcp-r: accept from 192.168.0.2 +ttcp-r: 1145339 bytes in 1.18 real seconds = 947.88 KB/sec +++ +ttcp-r: 792 I/O calls, msec/call = 1.53, calls/sec = 671.19 +ttcp-r: 0.0user 1.1sys 0:01real 100% 0i+0d 0maxrss 0+0pf 0+0csw +************ MBUF STATISTICS ************ +mbufs:1024 clusters: 128 free: 112 +drops: 0 waits: 0 drains: 0 + free:1007 data:17 header:0 socket:0 + pcb:0 rtable:0 htable:0 atable:0 + soname:0 soopts:0 ftable:0 rights:0 + ifaddr:0 control:0 oobdata:0 + +************ INTERFACE STATISTICS ************ +***** open_eth1 ***** +Address:192.168.0.66 Broadcast Address:192.168.0.255 +Flags: Up Broadcast Running Simplex +Send queue limit:50 length:0 Dropped:0 + Rx Packets:796 Rx Interrupts:796 Length:0 + Bad CRC:0 Overrun:0 Miss:0 + Tx Interrupts:0 Deferred:0 Missed Hearbeat:0 + No Carrier:0 Retransmit Limit:0 Late Collision:0 + Underrun:0 Raw output wait:0 + +************ IP Statistics ************ + total packets received 795 + datagrams delivered to upper level 795 + total ip packets generated here 401 + +************ TCP Statistics ************ + connections accepted 1 + connections established 1 + conn. closed (includes drops) 1 + segs where we tried to get rtt 2 + times we succeeded 2 + delayed acks sent 4 + total packets sent 401 + ack-only packets sent 6 + window update-only packets sent 394 + control (SYN|FIN|RST) packets sent 1 + total packets received 795 + packets received in sequence 792 + bytes received in sequence 1145339 + rcvd ack packets 2 + bytes acked by rcvd acks 2 + times hdr predict ok for data pkts 791 + + |