[zcu104] How to use FPDMA to move data from PL DDR to PS DDR

[sitting]

Hi,

I use AXI CDMA to move data from PL DDR to PS DDR now, but I want to change to use FPDMA. Is it possible to use FPDMA to move data from PL DDR to PS DDR? If yes, is there any example?

Thanks

Sitting

[abommera]

Hi @sitting ,

Yes, it is possible. You need to make sure the PS can access the PL DDR address which can be validated by looking into the vivado address editor.

Please refer to the below wiki page for standalone examples for your reference but you need to make use of the source address is PL DDR if you want to transfer data from PL to PS.

https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/18841725/ZynqMP+DMA+Standalone+driver

[sitting]

Hi @abommera ,

I want to do this on linux. Is there any dma api ? If not, should I develop custom driver to achieve it?

Thanks

Sitting

[abommera]

Hi @sitting ,

Please refer to the below wiki page for Linux DMA from user space. 

https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/18842418/Linux+DMA+From+User+Space

[sitting]

Hi @abommera ,

The tutorial you provided is for axi dma, should I modify it for fpdma or I can use it for fpdma directly?

Thanks

Sitting

[sitting · Accepted solution]

Hi ,

Finally, I use uio method(udmabuf) to do it and it works fine.