How do I copy 2D CUDA arrays/textures between contexts?

Question

Suppose I want to copy some memory between different CUDA contexts (possibly on different devices). The CUDA Driver API offers me:

• cuMemcpyPeer - for plain old device global memory
• cuMemcpy3DPeer - for 3D arrays/textures

But there doesn't seem to be a similar API function for 2D arrays. Why? And - what do I do? Should I go through plain global memory buffers in both contexts?

PS - Same question for asynchronous copies; we have the plain and 3D cases covered, but no 2D.