Ubuntu/aarch64 - Java API: vmm.VmmException: Native call to vmm failed!

[EmhyrVarEmreis]

MemProcFS v5.8.20 Defice: fpga Target system: Windows 11 Reading from rpi5

First I am getting:

[+] using FTDI device: 0403:601f (bus 2, device 2)
[+] FTDIFTDI SuperSpeed-FIFO Bridge000000000001

But when I call vmm.processGet it fails with vmm.VmmException: Native call to vmm failed! How to debug? What should I check?

[ufrisk]

Apologies for the slow answer.

First you'd have to check out if you have DMA access working at all.

I'd recommend using PCILeech for this. pcileech -device fpga -v display -min 0x1000 is it successful? If not try to shut down the target computer and start it again. Read again after that.

For additional info you may use: pcileech -device fpga -v display -min 0x1000 -vvv

If DMA is working you might require a memory map of the target system, especially if the target system is AMD-based. https://github.com/ufrisk/LeechCore/wiki/Device_FPGA_AMD_Thunderbolt

Let me know if this helps.

[ufrisk]

Did you resolve this issue or is it still not working?

[EmhyrVarEmreis]

Sorry, but I have not had time recently to come back to this problem but I still intend to investigate it

[EmhyrVarEmreis]

Issue still exists

On fresh start I got correct results with no errors reading memory with display pcileech -device fpga -v display -min 0x1000 -vvv

But when tried with Python API I got an error (same as in Java):

[+] using FTDI device: 0403:601f (bus 2, device 3)
[+] FTDIFTDI SuperSpeed-FIFO Bridge000000000001
[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output ErrorTraceback (most recent call last):
  File "/home/emhyr/hacking/test.py", line 4, in <module>
    vmm = memprocfs.Vmm(['-device', 'fpga'])
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: Vmm.init(): Initialization of vmm failed.

Then pcileech -device fpga -v display -min 0x1000 -vvv gives:

[+] using FTDI device: 0403:601f (bus 2, device 3)
[+] FTDIFTDI SuperSpeed-FIFO Bridge000000000001
[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output Error[-] bulk transfer error: Input/Output ErrorDEVICE: FPGA: ERROR: Unable to connect to FPGA device [0,v0.0,0000]
PCILEECH: Failed to connect to the device.

until I restart target computer or wait some time (several minutes).

RPi5 is on Ubuntu 22.04.3 LTS, freeshly updated

[ufrisk]

hm, I'd have to check this out on my RPi5 to see if I can replicate the issue. Hopefully in the weekend.

It very much looks like some libusb error though. If there is an issue with libusb or the underlying hardware / drivers there isn't really anything this project can do about unfortunately.

But I'll take a look at least :)