Kumar> I'm actually searching for any examples of drivers that
Kumar> deal with the issues related to DMA'ng directly two and
Kumar> from user space memory.
It's not quite the same story as what you're doing with DMA engines
inside the CPU, but you could look at drivers/infiniband, particularly
drivers/infiniband/core/uverbs_mem.c. That handles pinning and
getting DMA addresses for user memory that will be used as a DMA
target in the future.
- R.
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