From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from nz-out-0506.google.com (nz-out-0506.google.com [64.233.162.233]) by ozlabs.org (Postfix) with ESMTP id 53217DDD06 for ; Thu, 14 Jun 2007 16:13:44 +1000 (EST) Received: by nz-out-0506.google.com with SMTP id v1so420023nzb for ; Wed, 13 Jun 2007 23:13:43 -0700 (PDT) Message-ID: Date: Thu, 14 Jun 2007 00:13:42 -0600 From: "Grant Likely" Sender: glikely@secretlab.ca To: "xu chen" , linuxppc-dev@ozlabs.org Subject: Re: opb_ethernet driver In-Reply-To: <20070612034522.GA4198@localhost.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed References: <22250.22723.qm@web92006.mail.cnb.yahoo.com> <20070612034522.GA4198@localhost.localdomain> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On 6/11/07, David Gibson 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