Can't get PCIe (avalon-MM) reference design to work on Arria 10 Dev Kit.

Hi eapenabrm,

thank you for the suggestions!

Now I've switched to the "two-machine" method, as stated on page 13 in this document (https://www.altera.com/content/dam/altera-www/global/en_us/pdfs/literature/an/an456.pdf), to program the FPGA. I can see the Altera device in the output of

 lspci | grep Altera 

, and when I execute

lsmod | grep altera

, I can see that the module altera_dma is loaded.

However, the device file /dev/altera_dma never really shows up. There was only once I could get the the device /dev/altera_dma to appear under /dev/, but in that one case, the DMA requests always timed out.

In all the other attempts, I never be able to make /dev/altera_dma to show up again (meaning I will see "chmod: cannot access /dev/altera_dma: No such file or directory" when executing "sudo ./install" of the ref design software; I am not able to execute the ./install and ./run of the reference software successfully).

dmesg shows the following relevant messages, but I am not sure what went wrong:

 altera_dma: module verification failed: signature and/or required key missing - tainting kernel Altera DMA: altera_dma_init(), Nov  7 2017 10:46:02 
 Altera DMA 0000:01:00.0: Refused to change power state, currently in D3
 Altera DMA 0000:01:00.0: can't enable device: BAR 0  not claimed
 Altera DMA 0000:01:00.0: pci_enable_device() failed
 Altera DMA 0000:01:00.0: goto err_enable
 Altera DMA 0000:01:00.0: goto err_initchrdev
 Altera DMA 0000:01:00.0: goto err_bk_alloc
 Altera DMA: probe of 0000:01:00.0 failed with error -22
 Altera DMA: altera_dma_init(), Nov  7 2017 10:46:05 
 Altera DMA 0000:01:00.0: Refused to change power state, currently in D3
 Altera DMA 0000:01:00.0: can't enable device: BAR 0  not claimed
 Altera DMA 0000:01:00.0: pci_enable_device() failed
 Altera DMA 0000:01:00.0: goto err_enable
 Altera DMA 0000:01:00.0: goto err_initchrdev
 Altera DMA 0000:01:00.0: goto err_bk_alloc
 Altera DMA: probe of 0000:01:00.0 failed with error -22

Any suggestion is much appreciated!!!!