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

Doing FLR makes the pcie device hang

I am trying to do initiate Function Level Reset, on Avlaon streaming pcie hard IP, using setpci command and if I try to read the device back using lspci command the device is hang with ff as shown below,

lspci -v -d:11e1
3b:00.0 Co-processor: Intel Corporation Device 11e1 (rev ff) (prog-if ff)
!!! Unknown header type 7f

------------------------------------------------------------------------------------------------

I am doing the FLR using setpci as :

setpci -s 3b:00.0 0x78.W
2037
setpci -s 3b:00.0 0x78.W=0xa037
setpci -s 3b:00.0 0x78.W
ffff

Can anyone tell the reason why the device is hung up like this?

7 Replies

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

    Hi,


    Can I know which device that you are using ?

    also, which tile of AVST example that you are referring to ?




  • pdewanga's avatar
    pdewanga
    Icon for New Contributor rankNew Contributor
    2 years ago

    Hi,

    The device is 1SG10MHN3F74C2LG

    Using the Intel L-/H-Tile Avalon streaming for PCI Express

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

    Hi,


    Do you check LTSSM signal and ensure the card is able to link up ?

    Other than that, you may check the DIP switch and ensure that it is set to default setting.


    If not, I would like to suggest you to regenerate a new design example in the IP catalog and see if the same.

    Looking forward to hear back from you.


    Regards,

    Wincent_Intel


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

    Hi,

    I wish to follow up with you about this case.

    Do you have any further questions on this matter ?

    ​​​​​​​Else I would like to have your permission to close this forum ticket

    Regards,

    Wincent_Intel


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

    Hi

    We have not hear from you and this Case is idling. It is not recommended to idle for too long.

    Therefore following our support policy, I have to put this case in close status. My apologies if any inconvenience cause

    Hence, This thread will be transitioned to community support.

    If you have a new question, feel free to open a new thread to get support from Intel experts.

    Otherwise, the community users will continue to help you on this thread. Thank you

    If your support experience falls below a 9 out of 10, I kindly request the opportunity to rectify it before concluding our interaction. If the issue cannot be resolved, please inform me of the cause so that I can learn from it and strive to enhance the quality of future service experiences.

    Regards,

    Wincent_Intel


  • pdewanga's avatar
    pdewanga
    Icon for New Contributor rankNew Contributor
    2 years ago

    Hi,

    Do you check LTSSM signal and ensure the card is able to link up ?

    Response- I tried capturing the LTSSM and link up signal on FPGA board after I do FLR.

    The link is up and LTSSM value is 11.

    Other than that, you may check the DIP switch and ensure that it is set to default setting.

    Response - Can you please provide more details of the DIP switch?

    If not, I would like to suggest you to regenerate a new design example in the IP catalog and see if the same.

    Response- I will do it and confirm.

    Regards,

    • pdewanga's avatar
      pdewanga
      Icon for New Contributor rankNew Contributor
      2 years ago

      Hi Wincent_Intel,

      I tried regenerating the Quartus IP and there also I am seeing same behavior.

      One more finding

      The flr_pf_active signal - output from Avalon-Streaming PCIe is zero after doing FLR.

      Please suggest is this correct behavior ?

      -Regards,

      Piyush