[PATCH v4 00/17] remoteproc: Add support for detaching a rproc

From: Mathieu Poirier <mathieu.poirier@linaro.org>
To: ohad@wizery.com, bjorn.andersson@linaro.org, robh+dt@kernel.org
Cc: arnaud.pouliquen@st.com, linux-remoteproc@vger.kernel.org,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v4 00/17] remoteproc: Add support for detaching a rproc
Date: Fri, 18 Dec 2020 10:32:11 -0700	[thread overview]
Message-ID: <20201218173228.2277032-1-mathieu.poirier@linaro.org> (raw)

Following the work done here [1], this set provides support for the
remoteproc core to release resources associated with a remote processor
without having to switch it off. That way a platform driver can be removed
or the application processor power cycled while the remote processor is
still operating.

Of special interest in this series are patches 5 and 6 where getting the
address of the resource table installed by an eternal entity if moved to
the core.  This is to support scenarios where a remote process has been
booted by the core but is being detached.  To re-attach the remote
processor, the address of the resource table needs to be known at a later
time than the platform driver's probe() function.

Applies cleanly on v5.10

Thanks,
Mathieu

[1]. https://lkml.org/lkml/2020/7/14/1600

----
New for v4:
- Made binding description OS agnostic (Rob)
- Added functionality to set the external resource table in the core
- Fixed a crash when detaching (Arnaud)
- Fixed error code propagation in rproc_cdev_relase() and rproc_del() (Arnaud)
- Added RB tags

Mathieu Poirier (17):
  dt-bindings: remoteproc: Add bindind to support autonomous processors
  remoteproc: Re-check state in rproc_shutdown()
  remoteproc: Remove useless check in rproc_del()
  remoteproc: Rename function rproc_actuate()
  remoteproc: Add new get_loaded_rsc_table() remoteproc operation
  remoteproc: stm32: Move resource table setup to rproc_ops
  remoteproc: Add new RPROC_ATTACHED state
  remoteproc: Properly represent the attached state
  remoteproc: Properly deal with a kernel panic when attached
  remoteproc: Add new detach() remoteproc operation
  remoteproc: Introduce function __rproc_detach()
  remoteproc: Introduce function rproc_detach()
  remoteproc: Add return value to function rproc_shutdown()
  remoteproc: Properly deal with a stop request when attached
  remoteproc: Properly deal with a start request when attached
  remoteproc: Properly deal with detach request
  remoteproc: Refactor rproc delete and cdev release path

 .../bindings/remoteproc/remoteproc-core.yaml  |  27 +++
 drivers/remoteproc/remoteproc_cdev.c          |  32 ++-
 drivers/remoteproc/remoteproc_core.c          | 211 +++++++++++++++---
 drivers/remoteproc/remoteproc_internal.h      |   8 +
 drivers/remoteproc/remoteproc_sysfs.c         |  20 +-
 drivers/remoteproc/stm32_rproc.c              | 147 ++++++------
 include/linux/remoteproc.h                    |  24 +-
 7 files changed, 344 insertions(+), 125 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/remoteproc/remoteproc-core.yaml

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