[linux kernel 2.6.19] ethernet driver for Marvell bridge GT-64260

[linux kernel 2.6.19] ethernet driver for Marvell bridge GT-64260

[joachim.bader]

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Hello,

I am porting linux kernel 2.6.19 on a platform based on PPC750FX together 
with a Marvell GT64260.
I use a patched 643xx driver which is back ported to 64260 by Steven J. 
Hill.
I have ethernet now up and running, but only if I switch debug on, which 
generates a big bunch of screen messages.
As soon as I switch debug off, I get the message "Virtual device %s asks 
to queue packet!" on every transmission request.

This happens on ping an other system.

Has anyone experience in such an event? Is there anything how I can speed 
up performance with the 64260?
Is there a similar problem known with the 64360?

Thanks in advance.
Joachim



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Re: [linux kernel 2.6.19] ethernet driver for Marvell bridge GT-64260

[Dale Farnsworth]

> 
> I am porting linux kernel 2.6.19 on a platform based on PPC750FX together 
> with a Marvell GT64260.
> I use a patched 643xx driver which is back ported to 64260 by Steven J. 
> Hill.
> I have ethernet now up and running, but only if I switch debug on, which 
> generates a big bunch of screen messages.
> As soon as I switch debug off, I get the message "Virtual device %s asks 
> to queue packet!" on every transmission request.
> 
> This happens on ping an other system.
> 
> Has anyone experience in such an event? Is there anything how I can speed 
> up performance with the 64260?
> Is there a similar problem known with the 64360?

No, this does not happen on the mv64360.  As I recall, that message occurs
when something attempts to queue a packet to a driver that has called
netif_stop_queue() but hasn't yet called netif_wake_queue().  I would
guess that when you turn debug on, you are changing the driver logic
in addition to the timing.

-Dale

[linux kernel 2.6.19] ethernet driver for Marvell bridge GT-64260

[joachim.bader]

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Hello everybody,

I continue the work of ThomasB to get a linux kernel 2.6.19 up and running 
on a PPC750FX based platform using a GT-64260.
From Thomas I got a patched mv643xx_eth driver which is ported to support 
the 64260, too.
Now the driver is integrated and runs complete through initialisation 
bringing up an eth0 device.
The initialisation seams to be ok (no error messages), the device is up 
and routing information is setup.
Now I try to ping a remote station but I receive nothing and I get no 
feedback from the remote compter.
As soon as I turn of the net interface (ifconfig eth0 down) I get the 
message "Tx time out or no link?)
Is there anything else I can check? Any idea what may cause this problem?

Thanks a lot for your help

Joachim



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Re: [linux kernel 2.6.19] ethernet driver for Marvell bridge GT-64260

[Dale Farnsworth]

> I continue the work of ThomasB to get a linux kernel 2.6.19 up and running
> on a PPC750FX based platform using a GT-64260.
> From Thomas I got a patched mv643xx_eth driver which is ported to support
> the 64260, too.
> Now the driver is integrated and runs complete through initialisation
> bringing up an eth0 device.
> The initialisation seams to be ok (no error messages), the device is up
> and routing information is setup.
> Now I try to ping a remote station but I receive nothing and I get no
> feedback from the remote compter.
> As soon as I turn of the net interface (ifconfig eth0 down) I get the
> message "Tx time out or no link?)
> Is there anything else I can check? Any idea what may cause this problem?

Steven Hill posted his patch series merging gt64260 ethernet support to
the netdev mailing list last month.  You might look at:

	http://lists.openwall.net/netdev/2007/07/19/22

and related patches.

The differences between 64260 and 64360 are so large that they are
unlikely to be merged into a single driver, but a separate driver
is a possibility if someone steps up to do the work.

-Dale