How Can I set up DMA operation with my own PC software application?

I have a Linux driver that at least triggers some DMA transfer. I will post it online once I have the last issues worked out. I need some insights though, can someone look along at what I miss?

Table 7-13 on page 7-19 of PCIe UG 8.0:

82 DWORDS (32-bit words) are transferred by the End Point DMA engine from Root Complex (or BFM) memory from (bus) address 0x8EF0 to End Point memory address 0x3.

The table also specifies that "Data" is initialized with incrementing values in the address range 0x8900-0x8940.

But this address range is not used in the DMA transfer at all??!

What did I miss?

The same question applies to descriptor [1] and [2].

Second unclearity:

In the header, no control bits are set. In the descriptors, no control bits are set.

How then can the Root Complex (BFM) poll for EPLAST??! It is only updated if either EPLAST_ENA is set in the descriptor control bits or header control bits.