[PATCH v1 0/5] Add Microchip IPC mailbox and remoteproc support

[Valentina Fernandez]

Hello all,

This series adds support for the Microchip Inter-Processor Communication
(IPC) mailbox controller, as well as an IPC remoteproc platform driver.

Microchip's family of RISC-V SoCs typically has one or more clusters
that can be configured to run in Asymmetric Multi-Processing (AMP) mode.

The Microchip IPC is used to send messages between processors using
an interrupt signaling mechanism. The driver uses the RISC-V Supervisor
Binary Interface (SBI) to communicate with software running in machine
mode (M-mode) to access the IPC hardware block.

Additional details on the Microchip vendor extension and the IPC
function IDs described in the driver can be found in the following
documentation:

https://github.com/linux4microchip/microchip-sbi-ecall-extension

The IPC remoteproc platform driver allows for starting and stopping
firmware on the remote cluster(s) and facilitates RPMsg communication.
The remoteproc attach/detach operations are also supported for use cases
where the firmware is loaded by the Hart Software Services
(zero-stage bootloader) before Linux boots.

Error Recovery and Power Management features are not currently
supported in the remoteproc platform driver.

The PIC64GX MPU has a Mi-V IHC block, this will be added to the PIC64GX
dts after the initial upstreaming:

https://patchwork.kernel.org/project/linux-riscv/patch/20240725121609.13101-18-pierre-henry.moussay@microchip.com/

Thanks,
Valentina

Valentina Fernandez (5):
  riscv: asm: vendorid_list: Add Microchip Technology to the vendor list
  dt-bindings: mailbox: add binding for Microchip IPC mailbox driver
  mailbox: add Microchip IPC support
  dt-bindings: remoteproc: add binding for Microchip IPC remoteproc
  remoteproc: add support for Microchip IPC remoteproc platform driver

 .../bindings/mailbox/microchip,sbi-ipc.yaml   | 115 ++++
 .../remoteproc/microchip,ipc-remoteproc.yaml  |  84 +++
 arch/riscv/include/asm/vendorid_list.h        |   1 +
 drivers/mailbox/Kconfig                       |  12 +
 drivers/mailbox/Makefile                      |   2 +
 drivers/mailbox/mailbox-mchp-ipc-sbi.c        | 539 ++++++++++++++++++
 drivers/remoteproc/Kconfig                    |  12 +
 drivers/remoteproc/Makefile                   |   1 +
 drivers/remoteproc/mchp_ipc_remoteproc.c      | 461 +++++++++++++++
 include/linux/mailbox/mchp-ipc.h              |  23 +
 10 files changed, 1250 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mailbox/microchip,sbi-ipc.yaml
 create mode 100644 Documentation/devicetree/bindings/remoteproc/microchip,ipc-remoteproc.yaml
 create mode 100644 drivers/mailbox/mailbox-mchp-ipc-sbi.c
 create mode 100644 drivers/remoteproc/mchp_ipc_remoteproc.c
 create mode 100644 include/linux/mailbox/mchp-ipc.h

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2.34.1