test_dram_dma.c error: "unable to open read dma queue"

Question

Hi,  
  
I am trying to run the test_dram_dma.c example on an f1.2xlarge instance. After downloading the FPGA image I encountered the following error on the last step:  
  
> sudo ./test_dram_dma  
2021-10-03T21:44:34.660395Z, test_dram_dma, INFO, test_dram_dma.c +74: main(): Checking to see if the right AFI is loaded...  
2021-10-03T21:44:34.670911Z, test_dram_dma, INFO, test_dram_dma_common.c +135: check_slot_config(): Operating on slot 0 with id: 0000:00:1d.0  
2021-10-03T21:44:34.671770Z, test_dram_dma, ERROR, test_dram_dma.c +122: dma_example(): unable to open read dma queue  
2021-10-03T21:44:34.671788Z, test_dram_dma, ERROR, test_dram_dma.c +82: main(): DMA example failed  
2021-10-03T21:44:34.671794Z, test_dram_dma, INFO, test_dram_dma.c +95: main(): TEST FAILED  
  
Has anyone else seen this error before, and if so, know what the issue is?  
  
Thanks,  
Kelvin

Accepted Answer

Hi Kelvin,  
  
Have you installed the XDMA driver on the instance? If you are using the FPGA Developer AMI, they come with XRT pre-installed. To use the cl_dram_dma examples, you would need to remove XRT and install the XDMA driver.  
  
Instructions are provided here:   
  
Let us know if you've done these steps and we can investigate further.  
  
Thanks,  
  
Deep

Answer

Thank you Deep. test_dram_dma passed after installing the xdma driver.   
  
Regards  
Kelvin

test_dram_dma.c error: &quot;unable to open read dma queue&quot;

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test_dram_dma.c error: "unable to open read dma queue"