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| 2 | Driver for opencores ethernet MAC - README |
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| 3 | ------------------------------------------ |
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| 4 | |
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| 5 | The device name for the driver is 'open_eth1', the attach |
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| 6 | function for the leon bsp is rtems_leon_open_eth_driver_attach(). |
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| 7 | |
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| 8 | No cache flushing is made when a frame is received. On leon, |
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| 9 | this means that cache snooping must be configured in the |
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| 10 | vhdl model and enabled by software. |
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| 11 | |
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| 12 | TX interrupts are not used and masked in the interrupt mask |
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| 13 | register. |
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| 14 | |
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| 15 | For now, only 10 Mbit/s half-duplex is supported. |
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| 16 | 100 Mbit/s operations does not work reliably, the transmitter |
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| 17 | locks up or skips frames. Seems to depend on the TX fifo |
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| 18 | implementation in the opencores MAC. Send a mail to |
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| 19 | jiri@gaisler.com if you know how to fix this. |
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| 20 | |
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| 21 | Tested only on leon, using the GR-PCI-XC2V board @ 40 MHz. |
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| 22 | Output from ttcp receiving 1 Mbyte file: |
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| 23 | |
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| 24 | >>> ttcp -r -s |
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| 25 | ttcp-r: buflen=8192, nbuf=2048, align=16384/0, port=5001 tcp |
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| 26 | ttcp-r: socket |
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| 27 | ttcp-r: accept from 192.168.0.2 |
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| 28 | ttcp-r: 1145339 bytes in 1.18 real seconds = 947.88 KB/sec +++ |
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| 29 | ttcp-r: 792 I/O calls, msec/call = 1.53, calls/sec = 671.19 |
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| 30 | ttcp-r: 0.0user 1.1sys 0:01real 100% 0i+0d 0maxrss 0+0pf 0+0csw |
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| 31 | ************ MBUF STATISTICS ************ |
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| 32 | mbufs:1024 clusters: 128 free: 112 |
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| 33 | drops: 0 waits: 0 drains: 0 |
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| 34 | free:1007 data:17 header:0 socket:0 |
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| 35 | pcb:0 rtable:0 htable:0 atable:0 |
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| 36 | soname:0 soopts:0 ftable:0 rights:0 |
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| 37 | ifaddr:0 control:0 oobdata:0 |
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| 38 | |
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| 39 | ************ INTERFACE STATISTICS ************ |
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| 40 | ***** open_eth1 ***** |
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| 41 | Address:192.168.0.66 Broadcast Address:192.168.0.255 |
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| 42 | Flags: Up Broadcast Running Simplex |
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| 43 | Send queue limit:50 length:0 Dropped:0 |
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| 44 | Rx Packets:796 Rx Interrupts:796 Length:0 |
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| 45 | Bad CRC:0 Overrun:0 Miss:0 |
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| 46 | Tx Interrupts:0 Deferred:0 Missed Hearbeat:0 |
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| 47 | No Carrier:0 Retransmit Limit:0 Late Collision:0 |
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| 48 | Underrun:0 Raw output wait:0 |
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| 49 | |
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| 50 | ************ IP Statistics ************ |
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| 51 | total packets received 795 |
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| 52 | datagrams delivered to upper level 795 |
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| 53 | total ip packets generated here 401 |
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| 54 | |
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| 55 | ************ TCP Statistics ************ |
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| 56 | connections accepted 1 |
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| 57 | connections established 1 |
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| 58 | conn. closed (includes drops) 1 |
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| 59 | segs where we tried to get rtt 2 |
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| 60 | times we succeeded 2 |
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| 61 | delayed acks sent 4 |
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| 62 | total packets sent 401 |
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| 63 | ack-only packets sent 6 |
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| 64 | window update-only packets sent 394 |
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| 65 | control (SYN|FIN|RST) packets sent 1 |
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| 66 | total packets received 795 |
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| 67 | packets received in sequence 792 |
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| 68 | bytes received in sequence 1145339 |
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| 69 | rcvd ack packets 2 |
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| 70 | bytes acked by rcvd acks 2 |
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| 71 | times hdr predict ok for data pkts 791 |
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| 72 | |
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| 73 | |
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