From: "Grant Likely" <grant.likely@secretlab.ca>
To: "xu chen" <chenxurcy@yahoo.com.cn>, linuxppc-dev@ozlabs.org
Subject: Re: opb_ethernet driver
Date: Thu, 14 Jun 2007 00:13:42 -0600 [thread overview]
Message-ID: <fa686aa40706132313h7eb29b3ax9fb417fc54a1e30@mail.gmail.com> (raw)
In-Reply-To: <20070612034522.GA4198@localhost.localdomain>
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
(403) 399-0195
next prev parent reply other threads:[~2007-06-14 6:13 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
2007-06-14 6:13 ` Grant Likely [this message]
-- strict thread matches above, loose matches on Subject: below --
2007-06-11 2:47 xu chen
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