opb_ethernet driver

opb_ethernet driver

[xu chen]

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Hello.
      I'm porting an opb_ethernet driver to my ml403 board now, using the 2.6.17 kernel. I know the ethernet support 3 mode: No DMA, simple DMA, scatter gather DMA, when I use the No DMA mode, we can write the skb into the FIFO, but can't ping other PCs in the network. When I use the simple DMA mode, at the time of ping, in the driver, we should initialize the DMA channel, but when transfering the skb, the DMA returns a "DMA bus time out" signal. 
     Now I'm worry about it. Who had encountered the problem before? I think I need some help.

 		
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opb_ethernet driver

[xu chen]

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Hello.
      I'm porting an opb_ethernet driver to my ml403 board now, using the 2.6.17 kernel. I know the ethernet support 3 mode: No DMA, simple DMA, scatter gather DMA, when I use the No DMA mode, we can write the skb into the FIFO, but can't ping other PCs in the network. When I use the simple DMA mode, at the time of ping, in the driver, we should initialize the DMA channel, but when transfering the skb, the DMA returns a "DMA bus time out" signal.
     Now I'm worry about it. Who had encountered the problem before? I think I need some help.




       
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Re: opb_ethernet driver

[David Gibson]

On Mon, Jun 11, 2007 at 10:37:55AM +0800, xu chen wrote:
> Hello.
>       I'm porting an opb_ethernet driver to my ml403 board now, using the 2.6.17 kernel. I know the ethernet support 3 mode: No DMA, simple DMA, scatter gather DMA, when I use the No DMA mode, we can write the skb into the FIFO, but can't ping other PCs in the network. When I use the simple DMA mode, at the time of ping, in the driver, we should initialize the DMA channel, but when transfering the skb, the DMA returns a "DMA bus time out" signal. 
>      Now I'm worry about it. Who had encountered the problem before? I think I need some help.

What's an opb_ethernet?

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

Re: opb_ethernet driver

[Grant Likely]

On 6/11/07, David Gibson <david@gibson.dropbear.id.au> wrote:
> On Mon, Jun 11, 2007 at 10:37:55AM +0800, xu chen wrote:
> > Hello.
> >       I'm porting an opb_ethernet driver to my ml403 board now, using the 2.6.17 kernel. I know the ethernet support 3 mode: No DMA, simple DMA, scatter gather DMA, when I use the No DMA mode, we can write the skb into the FIFO, but can't ping other PCs in the network. When I use the simple DMA mode, at the time of ping, in the driver, we should initialize the DMA channel, but when transfering the skb, the DMA returns a "DMA bus time out" signal.
> >      Now I'm worry about it. Who had encountered the problem before? I think I need some help.
>
> What's an opb_ethernet?

In this context, it's a Xilinx Ethernet IP core implemented in an FPGA
and connected to the OPB bus.

g.

-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.
grant.likely@secretlab.ca
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