smc91x ethernet an DBAU1200

smc91x ethernet an DBAU1200

[Daniel Mack]

Hi list,

is there anyone out there successfully using the SMC 91C111 ethernet  
chip
on AMD's DBAU1200 eval kit? In my setup here, it's working fine from  
within
the YAMON boot loader so I can use it to download a kernel image via  
TFTP.
The kernel (bleeding edge linux-2.6 mips-GIT) detects the device as well

	smc91x.c: v1.1, sep 22 2004 by Nicolas Pitre <nico@cam.org>
	eth0: SMC91C11xFD (rev 1) at b9000300 IRQ 65 [nowait]
	eth0: Ethernet addr: 00:00:1a:19:11:8c

and is able to mount its root filesystem via NFS. However, the  
communication
does not seem to be sufficiently stable, messages like this occur  
regularily:

	nfs: server 192.168.1.200 not responding, still trying
	nfs: server 192.168.1.200 not responding, still trying

As the machine acts as NFS server for several other linux embedded  
systems,
I don't suspect it to be the problem. Also, things like cables etc  
have been
properly checked.

Before I'm starting research, I'd like to know whether this is a known
issue or whether there are any mandatory settings I missed.

Thanks for any hint,
Daniel

Re: smc91x ethernet an DBAU1200

[Johannes Stezenbach]

Hi Daniel,

On Fri, Jun 23, 2006, Daniel Mack wrote:
>is there anyone out there successfully using the SMC 91C111 ethernet  
>chip
>on AMD's DBAU1200 eval kit? In my setup here, it's working fine from  
>within
>the YAMON boot loader so I can use it to download a kernel image via  
>TFTP.
>The kernel (bleeding edge linux-2.6 mips-GIT) detects the device as well
>
>	smc91x.c: v1.1, sep 22 2004 by Nicolas Pitre <nico@cam.org>
>	eth0: SMC91C11xFD (rev 1) at b9000300 IRQ 65 [nowait]
>	eth0: Ethernet addr: 00:00:1a:19:11:8c
>
>and is able to mount its root filesystem via NFS. However, the  
>communication
>does not seem to be sufficiently stable, messages like this occur  
>regularily:
>
>	nfs: server 192.168.1.200 not responding, still trying
>	nfs: server 192.168.1.200 not responding, still trying

I had similar issues with smc91x.c on a different platform,
where the bus it is connected to was rather slow (and no DMA)
-> dropped packets.

Try to use NFS via TCP, or force a 10Mbit connection
with ethtool or by hacking the driver (ctl_rspeed).
(For me tcp works.)


HTH,
Johannes

Re: smc91x ethernet an DBAU1200

[Daniel Mack]

On Jun 23, 2006, at 10:48 PM, Johannes Stezenbach wrote:

>> 	nfs: server 192.168.1.200 not responding, still trying
>> 	nfs: server 192.168.1.200 not responding, still trying
>
> I had similar issues with smc91x.c on a different platform,
> where the bus it is connected to was rather slow (and no DMA)
> -> dropped packets.
>
> Try to use NFS via TCP, or force a 10Mbit connection
> with ethtool or by hacking the driver (ctl_rspeed).
> (For me tcp works.)

Thanks Johannes, using TCP works fine here, too.

Daniel