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ThomasKindler's avatar
ThomasKindler
Icon for New Contributor rankNew Contributor
2 years ago
Solved

Arria 10 - Avalon MM DMA for PCIe crashes the PC when re-initializing the descriptor controller

Hi! I'm using the Avalon MM DMA for PCIe on a Terasic TR10a-HL Arria 10 board. The card is running the provided PCIe_Fundamental.sof demo image and is plugged into a server PC. I'm currently wr...
  • Wincent_Altera's avatar
    Wincent_Altera
    2 years ago

    Hi,


    The pin_perst is the power on reset of the FPGA board, when you reboot the host, it will toggle the pin_perst. Where the npor is driven by soft reset (user application), but the soft reset will also bring down the link, once link being bring down, we need to rebooting the PC.

    I have a discussion with another PCIe specialty, it seem like there is no other alternative to reset the DMA controller alone beside reboot the PC.


    Hope this answered your question.


    Regards,

    Wincent_Intel


Wincent_Altera's avatar
Wincent_Altera
Icon for Regular Contributor rankRegular Contributor
2 years ago

Hi,

Thank you for reaching out.

Just to let you know that Intel has received your support request and I am assigned to work on it.


Is it the post mentioned in your second reply able to help you to solve your problem ?

Best regards,

Wei Chuan


ThomasKindler's avatar
ThomasKindler
Icon for New Contributor rankNew Contributor
2 years ago

Thanks for looking into it!

As said, the hot reset is only a workaround - it takes ~1s, and as I understand, may reset other devices connected to the same bridge.

So an official sequence to reprogram the descriptor controller's descriptor table registers would be preferred.