[PATCH V5 1/2] firmware: arm_scmi: Add QCOM Generic Vendor Protocol documentation

Sibi Sankar
2024-11-15T01:15:45Z

Add QCOM System Control Management Interface (SCMI) Generic Vendor
Extensions Protocol documentation.

Signed-off-by: Sibi Sankar <quic_sibis@quicinc.com>
---

v4:
* Update the protol attributes doc with more information. [Cristian]

.../arm_scmi/vendors/qcom/qcom_generic.rst | 211 ++++++++++++++++++
1 file changed, 211 insertions(+)
create mode 100644 drivers/firmware/arm_scmi/vendors/qcom/qcom_generic.rst

diff --git a/drivers/firmware/arm_scmi/vendors/qcom/qcom_generic.rst b/drivers/firmware/arm_scmi/vendors/qcom/qcom_generic.rst
new file mode 100644
index 000000000000..141bc932e30f
--- /dev/null
+++ b/drivers/firmware/arm_scmi/vendors/qcom/qcom_generic.rst
@@ -0,0 +1,211 @@
+.. SPDX-License-Identifier: GPL-2.0
+.. include:: <isonum.txt>
+
+===============================================================================
+QCOM System Control and Management Interface(SCMI) Vendor Protocols Extension
+===============================================================================
+
+:Copyright: |copy| 2024, Qualcomm Innovation Center, Inc. All rights reserved.
+
+:Author: Sibi Sankar <quic_sibis@quicinc.com>
+
+SCMI_GENERIC: System Control and Management Interface QCOM Generic Vendor Protocol
+==================================================================================
+
+This protocol is intended as a generic way of exposing a number of Qualcomm
+SoC specific features through a mixture of pre-determined algorithm string and
+param_id pairs hosted on the SCMI controller. It implements an interface compliant
+with the Arm SCMI Specification with additional vendor specific commands as
+detailed below.
+
+Commands:
+_________
+
+PROTOCOL_VERSION
+~~~~~~~~~~~~~~~~
+
+message_id: 0x0
+protocol_id: 0x80
+
++---------------+--------------------------------------------------------------+
+|Return values |
++---------------+--------------------------------------------------------------+
+|Name |Description |
++---------------+--------------------------------------------------------------+
+|int32 status |See ARM SCMI Specification for status code definitions. |
++---------------+--------------------------------------------------------------+
+|uint32 version |For this revision of the specification, this value must be |
+| |0x10000. |
++---------------+--------------------------------------------------------------+
+
+PROTOCOL_ATTRIBUTES
+~~~~~~~~~~~~~~~~~~~
+
+message_id: 0x1
+protocol_id: 0x80
+
++---------------+--------------------------------------------------------------+
+|Return values |
++------------------+-----------------------------------------------------------+
+|Name |Description |
++------------------+-----------------------------------------------------------+
+|int32 status |See ARM SCMI Specification for status code definitions. |
++------------------+-----------------------------------------------------------+
+|uint32 attributes |Bits[31:16] Reserved, must be to 0. |
+| |Bits[15:8] Number of agents in the system |
+| |Bits[7:0] Number of vendor protocols in the system |
++------------------+-----------------------------------------------------------+
+
+PROTOCOL_MESSAGE_ATTRIBUTES
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+message_id: 0x2
+protocol_id: 0x80
+
++---------------+--------------------------------------------------------------+
+|Return values |
++------------------+-----------------------------------------------------------+
+|Name |Description |
++------------------+-----------------------------------------------------------+
+|int32 status |See ARM SCMI Specification for status code definitions. |
++------------------+-----------------------------------------------------------+
+|uint32 attributes |For all message id's the parameter has a value of 0. |
++------------------+-----------------------------------------------------------+
+
+QCOM_SCMI_SET_PARAM
+~~~~~~~~~~~~~~~~~~~
+
+message_id: 0x10
+protocol_id: 0x80
+
++------------------+-----------------------------------------------------------+
+|Parameters |
++------------------+-----------------------------------------------------------+
+|Name |Description |
++------------------+-----------------------------------------------------------+
+|uint32 ext_id |Reserved, must be zero. |
++------------------+-----------------------------------------------------------+
+|uint32 algo_low |Lower 32-bit value of the algorithm string. |
++------------------+-----------------------------------------------------------+
+|uint32 algo_high |Upper 32-bit value of the algorithm string. |
++------------------+-----------------------------------------------------------+
+|uint32 param_id |Serves as the token message id for the algorithm string |
+| |and is used to set various parameters supported by it. |
++------------------+-----------------------------------------------------------+
+|uint32 buf[] |Serves as the payload for the specified param_id and |
+| |algorithm string pair. |
++------------------+-----------------------------------------------------------+
+|Return values |
++------------------+-----------------------------------------------------------+
+|Name |Description |
++------------------+-----------------------------------------------------------+
+|int32 status |SUCCESS: if the param_id and buf[] is parsed successfully |
+| |by the chosen algorithm string. |
+| |NOT_SUPPORTED: if the algorithm string does not have any |
+| |matches. |
+| |INVALID_PARAMETERS: if the param_id and the buf[] passed |
+| |is rejected by the algorithm string. |
++------------------+-----------------------------------------------------------+
+
+QCOM_SCMI_GET_PARAM
+~~~~~~~~~~~~~~~~~~~
+
+message_id: 0x11
+protocol_id: 0x80
+
++------------------+-----------------------------------------------------------+
+|Parameters |
++------------------+-----------------------------------------------------------+
+|Name |Description |
++------------------+-----------------------------------------------------------+
+|uint32 ext_id |Reserved, must be zero. |
++------------------+-----------------------------------------------------------+
+|uint32 algo_low |Lower 32-bit value of the algorithm string. |
++------------------+-----------------------------------------------------------+
+|uint32 algo_high |Upper 32-bit value of the algorithm string. |
++------------------+-----------------------------------------------------------+
+|uint32 param_id |Serves as the token message id for the algorithm string. |
++------------------+-----------------------------------------------------------+
+|uint32 buf[] |Serves as the payload and store of value for the specified |
+| |param_id and algorithm string pair. |
++------------------+-----------------------------------------------------------+
+|Return values |
++------------------+-----------------------------------------------------------+
+|Name |Description |
++------------------+-----------------------------------------------------------+
+|int32 status |SUCCESS: if the param_id and buf[] is parsed successfully |
+| |by the chosen algorithm string and the result is copied |
+| |into buf[]. |
+| |NOT_SUPPORTED: if the algorithm string does not have any |
+| |matches. |
+| |INVALID_PARAMETERS: if the param_id and the buf[] passed |
+| |is rejected by the algorithm string. |
++------------------+-----------------------------------------------------------+
+
+QCOM_SCMI_START_ACTIVITY
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+message_id: 0x12
+protocol_id: 0x80
+
++------------------+-----------------------------------------------------------+
+|Parameters |
++------------------+-----------------------------------------------------------+
+|Name |Description |
++------------------+-----------------------------------------------------------+
+|uint32 ext_id |Reserved, must be zero. |
++------------------+-----------------------------------------------------------+
+|uint32 algo_low |Lower 32-bit value of the algorithm string. |
++------------------+-----------------------------------------------------------+
+|uint32 algo_high |Upper 32-bit value of the algorithm string. |
++------------------+-----------------------------------------------------------+
+|uint32 param_id |Serves as the token message id for the algorithm string |
+| |and is generally used to start the activity performed by |
+| |the algorithm string. |
++------------------+-----------------------------------------------------------+
+|uint32 buf[] |Serves as the payload for the specified param_id and |
+| |algorithm string pair. |
++------------------+-----------------------------------------------------------+
+|Return values |
++------------------+-----------------------------------------------------------+
+|Name |Description |
++------------------+-----------------------------------------------------------+
+|int32 status |SUCCESS: if the activity performed by the algorithm string |
+| |starts successfully. |
+| |NOT_SUPPORTED: if the algorithm string does not have any. |
+| |matches or if the activity is already running. |
++------------------+-----------------------------------------------------------+
+
+QCOM_SCMI_STOP_ACTIVITY
+~~~~~~~~~~~~~~~~~~~~~~~
+
+message_id: 0x13
+protocol_id: 0x80
+
++------------------+-----------------------------------------------------------+
+|Parameters |
++------------------+-----------------------------------------------------------+
+|Name |Description |
++------------------+-----------------------------------------------------------+
+|uint32 ext_id |Reserved, must be zero. |
++------------------+-----------------------------------------------------------+
+|uint32 algo_low |Lower 32-bit value of the algorithm string. |
++------------------+-----------------------------------------------------------+
+|uint32 algo_high |Upper 32-bit value of the algorithm string. |
++------------------+-----------------------------------------------------------+
+|uint32 param_id |Serves as the token message id for the algorithm string |
+| |and is generally used to stop the activity performed by |
+| |the algorithm string. |
++------------------+-----------------------------------------------------------+
+|uint32 buf[] |Serves as the payload for the specified param_id and |
+| |algorithm string pair. |
++------------------+-----------------------------------------------------------+
+|Return values |
++------------------+-----------------------------------------------------------+
+|Name |Description |
++------------------+-----------------------------------------------------------+
+|int32 status |SUCCESS: if the activity performed by the algorithm string |
+| |stops successfully. |
+| |NOT_SUPPORTED: if the algorithm string does not have any |
+| |matches or if the activity isn't running. |
++------------------+-----------------------------------------------------------+
--
2.34.1