how to communicate SPE-fw and CCPLEX with data_channel?

hello all,

I update my dto in for spe-fw. But how to communicate each other with /sys/devices/aon_echo/data_channel?
How to send a message from spe-fw to linux and linux to spe-fw??

I saw and replied a similar question in another thread [url]How to integrated work SPE-fw and CUDA? - Jetson TX2 - NVIDIA Developer Forums

Please check.