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Cyclone V errata TLP Corruption in x2 Mode

NGord
New Contributor I
833 Views

I have just noticed Cyclone V errata TLP Corruption in x2 Mode.
Can you please shed some extra light on this, it was only posted last year after about 10 years!

We have been using x2 mode for years now.

What precisely are the observed symptoms when this random corruption occurs?

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1 Solution
VenTingT
Employee
674 Views

Hi @NGord,


Yes, redesigning it to Gen 1x4 with only 2 lanes connected will provide the same throughput.


Thanks.

Best Regards,

VenTing_Intel


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VenTingT
Employee
751 Views

Hi @NGord,


Thanks for reaching out to the Intel Community Forum.


After checking the records, the issue was discovered in hardware. It was found when corrupted TLP packets were sent by the PCIe HIP to the application logic when the link was in Recovery mode. The x2 mode has been removed from the IP Parameter Editor starting from Quartus Prime Standard Edition v23.1.


The options are to redesign the product to not use x2 mode; instead, use a Gen 2x4 with only two lanes connected, or a Gen 1x4 with all lanes connected. These two options provide the design with the same throughput.


Thanks.

Best Regards,

VenTing_Intel


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NGord
New Contributor I
712 Views

To clarify, if I am using Gen 1 2 lanes, I can simply change to Gen 1 4 lanes, 2 unused and I will get the same performance?

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VenTingT
Employee
675 Views

Hi @NGord,


Yes, redesigning it to Gen 1x4 with only 2 lanes connected will provide the same throughput.


Thanks.

Best Regards,

VenTing_Intel


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NGord
New Contributor I
641 Views
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VenTingT
Employee
611 Views

Hi @NGord,


I’m glad that your question has been addressed. I now transition this thread to community support. If you have a new question, please login to https://supporttickets.intel.com/, view details of the desire request, and post a feed or response within the next 15 days to allow me to continue to support you. After 15 days, this thread will transition to community support. The community users will be able to help you with your follow-up questions.


Thanks.

Best Regards,

VenTing_Intel


p/s: If any answers from the community or Intel support are helpful, please feel free to mark them as solutions, give them kudos, and rate 4/5 for the survey.


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