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Jw_Soar's avatar
Jw_Soar
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2 years ago

How do I use the AVMM DMA driver to access registers

I followed this Reference Design https://community.intel.com/t5/FPGA-Wiki/Reference-Design-Gen3x8-AVMM-DMA-with-external-DDR4-Arria-10/ta-p/735895

This driver generates a character device named altera_dma.

I implemented a dma operation by reading and writing content to this character device.

Now, I want to know how I use this driver to access Altera 10's registers.

Thanks!

I also tried using mmap() to access /dev/mem, but it doesn't work.

4 Replies

  • ZH_Intel's avatar
    ZH_Intel
    Icon for Frequent Contributor rankFrequent Contributor
    2 years ago

    Hi Jw_Soar,

    Thank you for reaching out.

    Just to let you know that Intel has received your support request and currently we are confirming the details with our internal team.

    Allow me some time to look into your issue. I shall come back to you with findings.

    Thank you for your patience.

    Best Regards,

    ZulsyafiqH_Intel


  • ZH_Intel's avatar
    ZH_Intel
    Icon for Frequent Contributor rankFrequent Contributor
    2 years ago

    Hi Jw_Soar,

    Thank you for your patience.

    Allow me to clarify with you below items:


    Q1. May I know which Quartus version you are using?

    Q2. Did you receive any error message when running the design?

    Q3. Did you follow the steps to run the application? Could you briefly explain on the steps taken to reproduce the symptom you describe.


    Looking forward to your reply.

    Thank you.

    Best Regards,

    ZulsyafiqH_Intel


  • ZH_Intel's avatar
    ZH_Intel
    Icon for Frequent Contributor rankFrequent Contributor
    2 years ago

    Hi Jw_Soar,

    Good day.

    I wish to follow up with you on this Case.

    We have not heard from you for quite some time.

    I would like to get update on my question from my previous reply.


    Q1. May I know which Quartus version you are using?

    Q2. Did you receive any error message when running the design?

    Q3. Did you follow the steps to run the application? Could you briefly explain on the steps taken to reproduce the symptom you describe.


    Hoping to hear back from you so that we can proceed for next step.


    Thank you.

    Best Regards,

    ZulsyafiqH_Intel


  • ZH_Intel's avatar
    ZH_Intel
    Icon for Frequent Contributor rankFrequent Contributor
    2 years ago

    Hi Jw_Soar,


    We do not receive any response from you to the previous question that I have provided.

    Due to no response for more than 2 weeks, this thread will be transitioned to community support. If you have a new question, feel free to open a new thread to get the support from Intel experts. Otherwise, the community users will continue to help you on this thread.


    Thank you.

    Best Regards,

    ZulsyafiqH_Intel