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BrianSune_Froum's avatar
BrianSune_Froum
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16 days ago
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Avalon-MM Cyclone V Hard IP for PCI Express Intel FPGA IP Soft Reset and Hard Reset

Dear Intel, Based on the forum info and datasheet it is allow to use soft reset rather than hard reset. In order to do so, changing <parameter name="force_src" value="0" /> to <parameter name="f...
Pcie
  • BrianSune_Froum's avatar
    BrianSune_Froum
    2 days ago

    Ok the solution to resolve SRC under Hard PCIe RP:

    The example from rocketchip and MitySOM gate the mgmt reset by nreset_status.

    Due to pin_perst is not used -> 1'b1

    The nreset_status will not release unless mgmt is reset with npor while gating mgmt reset by

    nreset_status will dead lock and never exit the reset.

BrianSune_Froum's avatar
BrianSune_Froum
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3 days ago

RongY_altera​ 

Can you read previous posts?

I am not focusing on npor problem

The issue is changing from HRC to SRC introduce stuck or hang on Linux driver load.

Where the HRC case did not have such issue.

Thanks

RongY_altera's avatar
RongY_altera
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2 days ago

Normally you need to follow the PCIe user guide to set hip_hard_reset_hwtcl to 0. I think you have done that and you're able to boot into Linux.

 

Once confirming PCIe link info correctly in lspci, you can try rescan and reset commands by referencing https://unix.stackexchange.com/questions/73908/how-to-reset-cycle-power-to-a-pcie-device

 

Regards,

Rong

 

  • BrianSune_Froum's avatar
    BrianSune_Froum
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    2 days ago

    RongY_altera​ 

    Can you read carefully previous posts?

    BrianSune_Froum wrote:

    The issue is changing from HRC to SRC introduce stuck or hang on Linux driver load.

    This is referring to the PCIe  itself not slot card nor end-point devices.

    You are not even able to type any thing as it stuck or hang once the pcie-altera.ko insert.

    Thanks

      • BrianSune_Froum's avatar
        BrianSune_Froum
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        2 days ago

        RongY_altera​ 

        I am amazed how can you run lspci when root port not even exist?

        Maybe another Altera staff can help this ticket?

        Feels like you are not well understand the entire PCIe system.

        And stop quoting useless stackexchange this is completely not related this ticket nor what it is asking.

        Thanks