Read request to PCIe testbench Root port BFM

Hi,

I am using the PCIe megacore function testbench to verify my PCIe end point design. I have replaced the Altera end point design with my end point, which has a DMA. I have also replaced the test driver module with my driver module.

In my design DMA in the end point is master. When it tries to read the shared memory space of Root port BFM (address 00000000) I get an ACK and a completion packet for the request. But the completion packet has unsupported type error(CS field is 001). The read length was 3 double words.

The standard says unsupported type error is generated if a particular service is not supported, which means the address is not valid or the read request itself is not supported in the root port model.

Any ideas anyone??

Pavan