PCIe controller of i.MX8MM DMA transfer support

cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 

PCIe controller of i.MX8MM DMA transfer support

504 Views
yasunori_suzuki
Contributor I

I have a question about PCIe controller of i.MX8MM.

Can  I use DMA transfer in RC mode?

Linux driver implemented DMA transfer in EP mode only.

But i.MX8MM reference manual seems like PCIe controller supports DMA tarnsfer RC mode and EP mode.  

BSP version is L4.14.98 2.00ga.

Labels (1)
0 Kudos
1 Reply

423 Views
weidong_sun
NXP TechSupport
NXP TechSupport

Hi 康議 鈴木,

According to the PCIe protocol, the DMA is initiated by the EP, and the RC side does not operate the DMA.

For example:

If I.MX8MM is used as EP, PCIe driver will operate DMA to transfer data.

Hope above information is helpful for you!

B.R,

Weidong