From: David Gibson <david@gibson.dropbear.id.au>
To: xu chen <chenxurcy@yahoo.com.cn>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: opb_ethernet driver
Date: Tue, 12 Jun 2007 13:45:22 +1000 [thread overview]
Message-ID: <20070612034522.GA4198@localhost.localdomain> (raw)
In-Reply-To: <22250.22723.qm@web92006.mail.cnb.yahoo.com>
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
next prev parent reply other threads:[~2007-06-12 3:45 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-11 2:37 opb_ethernet driver xu chen
2007-06-12 3:45 ` David Gibson [this message]
2007-06-14 6:13 ` Grant Likely
-- strict thread matches above, loose matches on Subject: below --
2007-06-11 2:47 xu chen
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