[RFC PATCH 00/10] Add RPMsg framework

[Tanmay Shah]

Remote Processor Messaging (RPMsg) framework is used to communicate
with remote processor. RPMsg is a virtio-based messaging bus that
allows U-Boot drivers to communicate with remote processors available
on the system. This patch also introduces new virtio transport layer
driver.

To keep things minimal for now hard-coded endpoint is used in U-Boot
to communicate with remote processor using RPMsg protocol. This will
be modified to use multiple endpoints in future.

U-Boot can't receive interrupts from remote processor as per design.
Hence, user has to know when the data will be available from remote
processor and call rpmsg_recv accordingly. Mostly it will be called
to receive response of query done using rpmsg_send.

Some code is already available to allocate memory for RPMsg however,
that framework is mostly TI platform specific and isn't used by any
other platforms. This series makes sure it does not break
previous code for other platforms. If platforms wants to use this new
framework it is expected to set "support_rpmsg_virtio" flag in
relative remoteproc device's platform data.

Also the framework introduced by this series is ported from the Linux
kernel so other platforms which already support RPMsg in the Linux
kernel can easily use this framework in U-Boot as well.

---


Tanmay Shah (10):
  remoteproc: move resource table definition
  firmware: zynqmp: move zynqmp_pm_request_node API
  remoteproc: add remoteproc virtio transport driver
  drivers: add RPMsg framework
  rpmsg: add sample client driver
  cmd: add rpmsg framework commands
  remoteproc: add attach/detach commands
  remoteproc: add zynqmp driver
  configs: zynqmp: enable remoteproc and rpmsg
  configs: sandbox: enable rpmsg

 MAINTAINERS                                |  15 +
 arch/sandbox/dts/test.dts                  |   8 +
 cmd/Kconfig                                |   6 +
 cmd/Makefile                               |   1 +
 cmd/remoteproc.c                           |  14 +-
 cmd/rpmsg.c                                |  61 +++
 configs/sandbox_defconfig                  |   4 +
 configs/xilinx_zynqmp_virt_defconfig       |   6 +
 drivers/Kconfig                            |   2 +
 drivers/Makefile                           |   1 +
 drivers/firmware/firmware-zynqmp.c         |  27 ++
 drivers/power/domain/zynqmp-power-domain.c |   7 -
 drivers/remoteproc/Kconfig                 |  20 +
 drivers/remoteproc/Makefile                |   2 +
 drivers/remoteproc/rproc-elf-loader.c      |  33 --
 drivers/remoteproc/rproc-uclass.c          | 125 +++++-
 drivers/remoteproc/rproc_virtio.c          | 422 +++++++++++++++++++++
 drivers/remoteproc/xlnx_rproc.c            | 411 ++++++++++++++++++++
 drivers/rpmsg/Kconfig                      |  39 ++
 drivers/rpmsg/Makefile                     |  13 +
 drivers/rpmsg/rpmsg-uclass.c               | 156 ++++++++
 drivers/rpmsg/rpmsg_internal.h             |  52 +++
 drivers/rpmsg/rpmsg_sample_client.c        |  63 +++
 drivers/rpmsg/sandbox_test_rpmsg.c         |  88 +++++
 drivers/rpmsg/virtio_rpmsg_bus.c           | 384 +++++++++++++++++++
 drivers/virtio/virtio-uclass.c             |   1 +
 drivers/virtio/virtio_ring.c               |  16 +
 include/dm/uclass-id.h                     |   1 +
 include/remoteproc.h                       | 130 ++++++-
 include/rpmsg.h                            | 145 +++++++
 include/rproc_virtio.h                     |  33 ++
 include/virtio.h                           |   7 +-
 include/virtio_ring.h                      |  32 ++
 include/zynqmp_firmware.h                  |  30 +-
 test/dm/Makefile                           |   1 +
 test/dm/rpmsg.c                            |  41 ++
 36 files changed, 2321 insertions(+), 76 deletions(-)
 create mode 100644 cmd/rpmsg.c
 create mode 100644 drivers/remoteproc/rproc_virtio.c
 create mode 100644 drivers/remoteproc/xlnx_rproc.c
 create mode 100644 drivers/rpmsg/Kconfig
 create mode 100644 drivers/rpmsg/Makefile
 create mode 100644 drivers/rpmsg/rpmsg-uclass.c
 create mode 100644 drivers/rpmsg/rpmsg_internal.h
 create mode 100644 drivers/rpmsg/rpmsg_sample_client.c
 create mode 100644 drivers/rpmsg/sandbox_test_rpmsg.c
 create mode 100644 drivers/rpmsg/virtio_rpmsg_bus.c
 create mode 100644 include/rpmsg.h
 create mode 100644 include/rproc_virtio.h
 create mode 100644 test/dm/rpmsg.c


base-commit: 94e7cb181ad6bd25d36a11c58e0df64e9f815888
-- 
2.25.1