[RFC PATCH 0/4] Add a RPMsg driver to support AI Processing Unit (APU)

[Alexandre Bailon]

This adds a RPMsg driver that implements communication between the CPU and an
APU.
This uses VirtIO buffer to exchange messages but for sharing data, this uses
a dmabuf, mapped to be shared between CPU (userspace) and APU.
The driver is relatively generic, and should work with any SoC implementing
hardware accelerator for AI if they use support remoteproc and VirtIO.

For the people interested by the firmware or userspace library,
the sources are available here:
https://github.com/BayLibre/open-amp/tree/v2020.01-mtk/apps/examples/apu

Alexandre Bailon (3):
  Add a RPMSG driver for the APU in the mt8183
  rpmsg: apu_rpmsg: update the way to store IOMMU mapping
  rpmsg: apu_rpmsg: Add an IOCTL to request IOMMU mapping

Julien STEPHAN (1):
  rpmsg: apu_rpmsg: Add support for async apu request

 drivers/rpmsg/Kconfig          |   9 +
 drivers/rpmsg/Makefile         |   1 +
 drivers/rpmsg/apu_rpmsg.c      | 752 +++++++++++++++++++++++++++++++++
 drivers/rpmsg/apu_rpmsg.h      |  52 +++
 include/uapi/linux/apu_rpmsg.h |  47 +++
 5 files changed, 861 insertions(+)
 create mode 100644 drivers/rpmsg/apu_rpmsg.c
 create mode 100644 drivers/rpmsg/apu_rpmsg.h
 create mode 100644 include/uapi/linux/apu_rpmsg.h

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2.26.2