Forum Post: Memory shared between peripheral DMA and DSP

Hi!

I have a buffer filled by external device attached to my DM3730 via GPMC. DMA handles it well enough.

But then I want to process data using DSP (and DSPLink accordingly) and send it somewhere away. So, how can I map DMA buffer and userspace DSPLink channel buffer  on the same memory region to avoid unnecessary data copying?

linux kernel v. 2.6.37 based on TI PSP