Netgear FA311
Quoted 5 lines · Alex
In the logs I'm seeing this:
Dec 25 15:25:18 tahallah last message repeated 2 times Dec 25 15:25:19 tahallah kernel: eth0: Something Wicked happened! 0783. Dec 25 15:25:19 tahallah kernel: eth0: Something Wicked happened! 0780.
783 means:
Tx Underrun
Tx Idle
Tx Packet Error
Tx Descriptor
Rx Packet Error
Rx Descriptor
Rx OK.
Hmm. I download the Documentation from National
(http://www.national.com/pf/DP/DP83815.html),
and the the tx burst size/fill threshold/drain threshold combination is invalid:
<<<<<<<< from natsemi.c:
/* Configure the PCI bus bursts and FIFO thresholds. */ /* Configure for standard, in-spec Ethernet. */
np->tx_config = (1<<28) + /* Automatic transmit padding */
(1<<23) + /* Excessive collision retry */
(0x0<<20) + /* Max DMA burst = 512 byte */
(8<<8) + /* fill threshold = 256 byte */
2; /* drain threshold = 64 byte */ writel(np->tx_config, ioaddr + TxConfig);
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But:
<<<<<<<< page 51
The MXDMA MUST NOT be greater than the Tx Fill Threshold
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Could you try this setup?
<<<<<<<<
/* Configure the PCI bus bursts and FIFO thresholds. */ /* Configure for standard, in-spec Ethernet. */
np->tx_config = (1<<28) + /* Automatic transmit padding */
(1<<23) + /* Excessive collision retry */
(6<<20) + /* Max DMA burst = 128 byte */
(8<<8) + /* fill threshold = 256 byte */
8; /* drain threshold = 256 byte */ writel(np->tx_config, ioaddr + TxConfig);
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--
Manfred
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Quoted 11 lines · Manfred
Could you try this setup?
<<<<<<<<
/* Configure the PCI bus bursts and FIFO thresholds. */ /* Configure for standard, in-spec Ethernet. */
np->tx_config= (1<<28) + /* Automatic transmit padding */(1<<23) + /* Excessive collision retry */ (6<<20) + /* Max DMA burst = 128 byte */ (8<<8) + /* fill threshold = 256 byte */ 8; /* drain threshold = 256 byte */
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Hmm, that little change worked a lot better. However thoughput is down to 700kb/s! Transferring files from the other machine to this machine is much faster - 868kb/s.
In the logs, I only got *one* message from the natsemi driver (and this happened when sending files from this machine to the other machine. No problems receiving from the other machine.
Dec 25 17:28:12 tahallah kernel: eth0: Something Wicked happened! 0583.
But I just realised that the other machine I'm using has an 10 megabit ethernet card (on the hub that one is shown on 10, my machine is shown as 100). I think this explains the throughput problem. When I get another 4 way power socket, I'll put my other machine (which has a 100 megabit card in it) on the network and see if that makes a difference.
Cheers,
Alex
Signature · 8 lines
Huffapuff! http://www.tahallah.clara.co.uk - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] Please read the FAQ at http://www.tux.org/lkml/