Forum Discussion
New Contributorpcie DMA memory read & write TLP
Hi
In the context of PCIe (Peripheral Component Interconnect Express), a Memory Write (MWr) Transaction Layer Packet (TLP) is used to transfer data from the initiator (the device initiating the transaction) to the target (the device receiving the transaction).
During a Memory Write transaction, the data is indeed used in the DMA (Direct Memory Access) process. DMA allows devices to transfer data directly to and from system memory without involving the CPU. The data sent in the MWr TLP is typically stored in a specific memory location or register within the target device.
So, the data carried by the MWr TLP is not unnecessary. It serves the purpose of updating or modifying data in the target device's memory or registers, and DMA facilitates this data transfer without CPU intervention.
Regards,
Wincent_Intel
Regular ContributorHi,
Thanks for accepting the solution.
Therefore following our support policy, I have to put this case in close status.
Hence, This thread will be transitioned to community support.
If you have a new question, feel free to open a new thread to get support from Intel experts.
Otherwise, the community users will continue to help you on this thread. Thank you
If your support experience falls below a 9 out of 10, I kindly request the opportunity to rectify it before concluding our interaction. If the issue cannot be resolved, please inform me of the cause so that I can learn from it and strive to enhance the quality of future service experiences.
Regards,
Wincent_Intel
