[PATCH] powerpc/powernv: Enable PCI peer-to-peer

[David Laight]

From: Benjamin Herrenschmidt
> Sent: 31 May 2017 03:26
...
> We might also need a way to provide the "initiator" with translated DMA
> addresses that allow to target the receiver.

Related to that is the ability to allocate memory that two (or more)
PCIe devices can DMA to/from.
That can be useful if peer-to-peer transfers are not available.

	David