Forum Discussion

10's avatar
10
Icon for New Contributor rankNew Contributor
6 years ago

Intel PCIE 512bit Controller

Hi,

I am using Intel P tile avalon MM PCIe Express and Intel PCIE 512 bit controller

Warning(16735): Verilog HDL warning at intel_pcie_dma_hwtcl.sv(329): actual bit length 174 differs from formal bit length 160 for port "desc_rdata_o"

Warning(16735): Verilog HDL warning at inigo_pcie_intel_pcie_dma_0.v(64): actual bit length 32 differs from formal bit length 174 for port "dma_wrdm_tx_data_i"

I am getting these kind of warning while synthesis

mainly its because of IP parameterization of PCIe DMA

here VFNUM address width

PFNUM address width

STATUS_DATA_WIDTH

STATUS_DATA_WIDHT

how can i fill these columns ?

anyone please explain with example

Thanks

4 Replies

  • SengKok_L_Intel's avatar
    SengKok_L_Intel
    Icon for Regular Contributor rankRegular Contributor
    6 years ago

    Hi,


    These warnings are come with the example design, and we have reported it to our engineering team. For this moment, you may safety ignore it, and we will improve it in the future version.


    Regards -SK


    • 10's avatar
      10
      Icon for New Contributor rankNew Contributor
      6 years ago

      Hi

      thanks for reply.

      I need to get utilization report of the design.

      because of this these kind of warnings 2lacs registers are removed due to lost fan out.

      How can i resolve this?

      thanks in advance

  • SengKok_L_Intel's avatar
    SengKok_L_Intel
    Icon for Regular Contributor rankRegular Contributor
    6 years ago

    Hi,


    I have generated an example design by using v20.3, and also observed quite a number of "lost fan out" from the IP or DMA controller. Since this happens within the internal IP logic, and those logic might be reserved or not actually using, therefore, there is no way for us to eliminate it. You can just safety ignore it as we don't expect it will impact the IP hardware functionality.


    Regards -SK


  • SengKok_L_Intel's avatar
    SengKok_L_Intel
    Icon for Regular Contributor rankRegular Contributor
    6 years ago

    If further support is needed in this thread, please post a response within 15 days. After 15 days, this thread will be transitioned to community support. The community users will be able to help you with your follow-up questions.