[Linaro-mm-sig] Memory Management Discussion

[Sree Kumar]

Thanks Jesse for initiating the mailing list.

We need to address the requirements of Graphics and Multimedia Accelerators
(IPs).
What we really need is a permanent solution (at upstream) which accommodates
the following requirements and conforms to Graphics and Multimedia use
cases.

1.Mechanism to map/unmap the memory. Some of the IPs’ have the ability to
address virtual memory and some can address only physically contiguous
address space. We need to address both these cases.
2.Mechanism to allocate and release memory.
3.Method to share the memory (ZERO copy is a MUST for better performance)
between different device drivers (example output of camera to multimedia
encoder).
4.Method to share the memory with different processes in userspace. The
sharing mechanism should include built-in security features.

Are there any special requirements from V4L or DRM perspectives?

Thanks,
Sree
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