DMA vs MSGDMA

It is strange that you can not open the file, I have no problem with that. I attach screenshots from Qsys. How should I set the parameters of mSGDMA? SDRAM has 64MB.

I understand your solution, it is fine but some of my calculations are quite specific and can not be done on the stream - I need data from different pieces of the image. So what i want to do is to transfer data from HPS memory to the FPGA RAM, run FPGA modules, send data back to HPS memory. I need for that two mSGDMA modules. It is clear for me.

I propose that we focused on the first stage - sending data to FPGA. I need technical support. If configuration in Qsys is ok I need to write code in my C app. And here is the biggest problem. How to run DMA from C code?