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pdewanga's avatar
pdewanga
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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 b...
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pdewanga's avatar
pdewanga
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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
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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