Intel QuickData DMA Engine Data Transfers via PCIe NTB Port and Request for Detailed Documentati

[tadeusz_gigaio]

Hello,

We have encountered exactly the same problem i.e DMA transfers using IOAT DMA Engine doesn't work over NTB.
We are using Linux kernel version 5.15.
All other scenarios work fine. We have tested the DMA Engine using in Kernel dmatest module and all tests are passing.
Also the IOAT selftests are passing. Here are some details about the platform:
CPU model name: Intel(R) Xeon(R) Platinum 8368 CPU @ 2.40GHz, cpu family: 6, model: 106
Unfortunately the White Paper you sent isn't very helpful as it refers to an very old Kernel v2.6.18, and the information there is very out of date. I would like to request the same info mpcukur requested in his original post again. Could you please provide some detailed documentation for IOAT DMA Engine, and confirm whether it has been tested with an NTB Bridge.

Best regards,

Tadeusz

[NormanS_Intel]

Hello tadeusz_gigaio,

Thank you for posting in the community!

To ensure you receive the most specialized assistance, we have a dedicated forum that addresses these specific concerns. Therefore, I will be moving this discussion to our Server Forum. This will allow our knowledgeable community and experts to provide you with timely and accurate solutions.

Best regards,

Norman S.

Intel Customer Support Engineer

[Sachinks]

Hello tadeusz_gigaio,

Thank you for posting in Intel community Forum.

We see that you are experiencing issues with DMA transfers using IOAT DMA Engine over NTB. We see that you are using Intel(R) Xeon(R) Platinum 8368 CPU.

Kindly provide us system model details that you are using ( motherboard model) so that we can check this further for you.

Regards,

Sachin KS

[Devi_Intel]

Hello tadeusz_gigaio,

Greeetings,

Regarding your case posting in Intel Community Forum, we are following up to find out if you were able to complete the actions we previously recommended.

Please reply to this thread to confirm, so we can continue helping with a resolution. Looking forward to receiving your reply

Thank you & Best Regards,

Devi