Regarding PCIExpress Problem in MPC8641D

[Kumar Gala]

On Aug 21, 2007, at 7:09 AM, sivaji wrote:

>
> Hai,
>
> Currently I am involved in the testing of a MPC8641D based board  
> designed by
> us. We have planned to test the PCI Express interface through a  
> back to back
> interface, host being mpc8641d and target is mpc8548.
>
> When trying a target DMA transaction we are not able to access the  
> host
> memory using pci Express bus. We are facingDMA Transfer Error.  
> Without DMA
> we are able to access the host memory from the target and target  
> memory from
> the host.
>
>
> The processor rev number is 2.0. The external irq[0-3] are pulled  
> down and
> the polarity is active low and it is level sensitive.
>
> Memory base address : 0x80000000 size:512MB
> I/O base address    : 0xe2000000 size:16MB.
> Kernel Version	    : 2.6.21

I suggest upgrading to 2.6.23-rc3.  There are a number of PCIe  
related fixes that have gone in.

- k