<pre><tt><tt><a href="Compose?To=linuxppc-embedded@ozlabs.org&YY=88037&order=down&sort=date&pos=0">Hello.<br> 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.<br> Now I'm worry about it. Who had encountered the problem before? I think I need some help.<br></a></tt></tt></pre><BR><BR><p> 
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