[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-ID: <20241025125110.1347757-1-valentina.fernandezalanis@microchip.com>
Date: Fri, 25 Oct 2024 13:51:07 +0100
From: Valentina Fernandez <valentina.fernandezalanis@...rochip.com>
To: <paul.walmsley@...ive.com>, <palmer@...belt.com>, <aou@...s.berkeley.edu>,
<peterlin@...estech.com>, <conor.dooley@...rochip.com>,
<conor+dt@...nel.org>, <ycliang@...estech.com>, <dminus@...estech.com>,
<prabhakar.mahadev-lad.rj@...renesas.com>, <jassisinghbrar@...il.com>,
<robh@...nel.org>, <krzk+dt@...nel.org>,
<valentina.fernandezalanis@...rochip.com>
CC: <linux-riscv@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
<devicetree@...r.kernel.org>
Subject: [PATCH v2 0/3] Add Microchip IPC mailbox
Hello all,
This series adds support for the Microchip Inter-Processor Communication
(IPC) mailbox driver.
I am submitting this v2 with the IPC mailbox patches and without the
IPC remoteproc drivers, as suggested in v1 [1].
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 PIC64GX MPU has a Mi-V IHC block, this will be added to the PIC64GX
dts after the initial upstreaming [2].
[1] https://patchwork.kernel.org/project/linux-remoteproc/cover/20240912170025.455167-1-valentina.fernandezalanis@microchip.com/
[2] https://patchwork.kernel.org/project/linux-riscv/patch/20240725121609.13101-18-pierre-henry.moussay@microchip.com/
changes since v1:
- use kmalloc and __pa() instead of DMA API
- fix size of buf_base to avoid potential buffer overflow
- add kernel doc for exported functions (mchp_ipc_get_chan_id)
- use EXPORT_SYMBOL_GPL instead of EXPORT_SYMBOL
- drop unnecessary blank line and fix alignment issues
- drop of_match_ptr
- move MODULE_DEVICE_TABLE next to the definition
- reword subject from riscv: asm: vendorid_list to riscv: sbi: vendorid_list
- remove the word "driver" from dt-binding commit subject
- make interrupt-names a required property for all cases
- add dependency on COMPILE_TEST and ARCH_MICROCHIP
Regards,
Valentina
Valentina Fernandez (3):
riscv: sbi: vendorid_list: Add Microchip Technology to the vendor list
dt-bindings: mailbox: add binding for Microchip IPC mailbox controller
mailbox: add Microchip IPC support
.../bindings/mailbox/microchip,sbi-ipc.yaml | 108 ++++
arch/riscv/include/asm/vendorid_list.h | 1 +
drivers/mailbox/Kconfig | 13 +
drivers/mailbox/Makefile | 2 +
drivers/mailbox/mailbox-mchp-ipc-sbi.c | 537 ++++++++++++++++++
include/linux/mailbox/mchp-ipc.h | 23 +
6 files changed, 684 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mailbox/microchip,sbi-ipc.yaml
create mode 100644 drivers/mailbox/mailbox-mchp-ipc-sbi.c
create mode 100644 include/linux/mailbox/mchp-ipc.h
--
2.34.1
Powered by blists - more mailing lists