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SivaKona's avatar
SivaKona
Icon for Occasional Contributor rankOccasional Contributor
4 years ago

MemWr access failing Quartus Generated PCIe EP on Stratix10MX

Hi Syafieq,

We are trying to bring up below design(shown in attached FPGA_noHBM_model.png) on a Stratix10 MX platform.

Quartus Version

Quartus Prime Version 21.2.0.72

PCIe End Point IP

Intel L/H Tile Avalon Memory Mapped for PCI Express

End Point Configuration

Gen3x8 (250MHz)

Mode of End Point

PIO

Enumeration status

EP is getting Enumerated (Device identified on BDF 0b:00.0) on FPGA Platform

Config register Access

PCIe Configuration space is accessible for both Read and Write

Memory Write on BAR0

Transactions are not reaching PCIe EP RXM_BAR0 Application interface (AVMM)

Memory Read on BAR0

Transactions are getting a response data of 0xFFFF_FFFF

MMIO API

Open Source C API (devmem2). devmem2 API is working for BAR0 MemReads of space other devices on the same host

Could you please help us with your inputs on how we can proceed further to debug this issue?

Regards

Siva Kona

1 Reply

  • SivaKona's avatar
    SivaKona
    Icon for Occasional Contributor rankOccasional Contributor
    4 years ago

    Hi,

    I got to know that there is a known issue with PCIe End Point as described below

    "During End Point Enumeration , some Read requests propagate into AVMM Interconnect and hang the interconnect"

    Is this issue really True? If Yes , What is the work around ?

    Regards

    Siva Kona

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