linux-kernel - [PATCH 0/2] Add qcom hvc/shmem transport

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Message-ID: <20230718160833.36397-1-quic_nkela@quicinc.com>
Date:   Tue, 18 Jul 2023 09:08:31 -0700
From:   Nikunj Kela <quic_nkela@...cinc.com>
To:     <sudeep.holla@....com>
CC:     <cristian.marussi@....com>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <agross@...nel.org>, <andersson@...nel.org>,
        <konrad.dybcio@...aro.org>, <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-msm@...r.kernel.org>,
        Nikunj Kela <quic_nkela@...cinc.com>
Subject: [PATCH 0/2] Add qcom hvc/shmem transport

This change introduce a new transport channel for Qualcomm virtual
platforms. The transport is mechanically similar to ARM_SCMI_TRANSPORT_SMC.
The difference between the two transports is that a parameter is passed in
the hypervisor call to identify which doorbell to assert. This parameter is
dynamically generated at runtime on the device and insuitable to pass via
the devicetree.

The function ID and parameter are stored by firmware in the shmem region.

This has been tested on ARM64 virtual Qualcomm platform.

Nikunj Kela (2):
  dt-bindings: arm: Add qcom specific hvc transport for SCMI
  firmware: arm_scmi: Add qcom hvc/shmem transport

 .../bindings/firmware/arm,scmi.yaml           |  69 +++++
 drivers/firmware/arm_scmi/Kconfig             |  13 +
 drivers/firmware/arm_scmi/Makefile            |   1 +
 drivers/firmware/arm_scmi/common.h            |   3 +
 drivers/firmware/arm_scmi/driver.c            |   4 +
 drivers/firmware/arm_scmi/qcom_hvc.c          | 241 ++++++++++++++++++
 6 files changed, 331 insertions(+)
 create mode 100644 drivers/firmware/arm_scmi/qcom_hvc.c

-- 
2.17.1