From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from web92009.mail.cnb.yahoo.com (web92009.mail.cnb.yahoo.com [203.209.230.56]) by ozlabs.org (Postfix) with SMTP id 37F91DDEF7 for ; Mon, 11 Jun 2007 12:54:22 +1000 (EST) Date: Mon, 11 Jun 2007 10:47:40 +0800 (CST) From: xu chen Subject: opb_ethernet driver To: linuxppc-embedded@ozlabs.org MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-2010683304-1181530060=:63061" Message-ID: <452567.63061.qm@web92009.mail.cnb.yahoo.com> List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , --0-2010683304-1181530060=:63061 Content-Type: text/plain; charset=gb2312 Content-Transfer-Encoding: 8bit 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. --------------------------------- ÇÀ×¢ÑÅ»¢Ãâ·ÑÓÊÏä3.5GÈÝÁ¿£¬20M¸½¼þ£¡ --0-2010683304-1181530060=:63061 Content-Type: text/html; charset=gb2312 Content-Transfer-Encoding: 8bit 
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.


ÇÀ×¢ÑÅ»¢Ãâ·ÑÓÊÏä3.5GÈÝÁ¿£¬20M¸½¼þ£¡ --0-2010683304-1181530060=:63061--