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152 lines
4.4 KiB
152 lines
4.4 KiB
/* SPDX-License-Identifier: BSD-3-Clause */
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/*
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* Copyright (c) 2015-2024, Arm Limited and Contributors. All rights reserved.
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* Copyright (c) 2019-2020, Linaro Limited
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*/
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#ifndef SCMI_MSG_COMMON_H
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#define SCMI_MSG_COMMON_H
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#include <assert.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <string.h>
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#include "base.h"
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#include "clock.h"
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#include "power_domain.h"
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#include "reset_domain.h"
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#include "sensor.h"
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#define SCMI_VERSION 0x20000U
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#define SCMI_IMPL_VERSION 0U
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#define SCMI_PLAYLOAD_MAX 92U
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/*
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* Copy name identifier in target buffer following the SCMI specification
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* that state name identifier shall be a null terminated string.
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*/
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#define COPY_NAME_IDENTIFIER(_dst_array, _name) \
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do { \
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assert(strlen(_name) < sizeof(_dst_array)); \
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strlcpy((_dst_array), (_name), sizeof(_dst_array)); \
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} while (0)
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/* Common command identifiers shared by all procotols */
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enum scmi_common_message_id {
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SCMI_PROTOCOL_VERSION = 0x000,
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SCMI_PROTOCOL_ATTRIBUTES = 0x001,
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SCMI_PROTOCOL_MESSAGE_ATTRIBUTES = 0x002
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};
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/* Common platform-to-agent (p2a) PROTOCOL_VERSION structure */
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struct scmi_protocol_version_p2a {
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int32_t status;
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uint32_t version;
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};
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/* Generic platform-to-agent (p2a) PROTOCOL_ATTRIBUTES structure */
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struct scmi_protocol_attributes_p2a {
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int32_t status;
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uint32_t attributes;
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};
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/* Generic agent-to-platform (a2p) PROTOCOL_MESSAGE_ATTRIBUTES structure */
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struct scmi_protocol_message_attributes_a2p {
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uint32_t message_id;
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};
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/* Generic platform-to-agent (p2a) PROTOCOL_MESSAGE_ATTRIBUTES structure */
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struct scmi_protocol_message_attributes_p2a {
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int32_t status;
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uint32_t attributes;
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};
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/*
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* struct scmi_msg - SCMI message context
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*
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* @agent_id: SCMI agent ID, safely set from secure world
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* @protocol_id: SCMI protocol ID for the related message, set by caller agent
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* @message_id: SCMI message ID for the related message, set by caller agent
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* @in: Address of the incoming message payload copied in secure memory
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* @in_size: Byte length of the incoming message payload, set by caller agent
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* @out: Address of of the output message payload message in non-secure memory
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* @out_size: Byte length of the provisionned output buffer
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* @out_size_out: Byte length of the output message payload
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*/
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struct scmi_msg {
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unsigned int agent_id;
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unsigned int protocol_id;
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unsigned int message_id;
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char *in;
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size_t in_size;
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char *out;
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size_t out_size;
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size_t out_size_out;
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};
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/*
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* Type scmi_msg_handler_t is used by procotol drivers to safely find
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* the handler function for the incoming message ID.
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*/
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typedef void (*scmi_msg_handler_t)(struct scmi_msg *msg);
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/*
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* scmi_msg_get_base_handler - Return a handler for a base message
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* @msg - message to process
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* Return a function handler for the message or NULL
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*/
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scmi_msg_handler_t scmi_msg_get_base_handler(struct scmi_msg *msg);
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/*
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* scmi_msg_get_clock_handler - Return a handler for a clock message
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* @msg - message to process
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* Return a function handler for the message or NULL
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*/
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scmi_msg_handler_t scmi_msg_get_clock_handler(struct scmi_msg *msg);
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/*
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* scmi_msg_get_rstd_handler - Return a handler for a reset domain message
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* @msg - message to process
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* Return a function handler for the message or NULL
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*/
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scmi_msg_handler_t scmi_msg_get_rstd_handler(struct scmi_msg *msg);
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/*
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* scmi_msg_get_pd_handler - Return a handler for a power domain message
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* @msg - message to process
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* Return a function handler for the message or NULL
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*/
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scmi_msg_handler_t scmi_msg_get_pd_handler(struct scmi_msg *msg);
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/*
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* scmi_msg_get_sensor_handler - Return a handler for a sensor message
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* @msg - message to process
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* Return a function handler for the message or NULL
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*/
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scmi_msg_handler_t scmi_msg_get_sensor_handler(struct scmi_msg *msg);
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/*
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* Process Read, process and write response for input SCMI message
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*
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* @msg: SCMI message context
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*/
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void scmi_process_message(struct scmi_msg *msg);
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/*
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* Write SCMI response payload to output message shared memory
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*
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* @msg: SCMI message context
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* @payload: Output message payload
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* @size: Byte size of output message payload
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*/
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void scmi_write_response(struct scmi_msg *msg, void *payload, size_t size);
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/*
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* Write status only SCMI response payload to output message shared memory
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*
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* @msg: SCMI message context
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* @status: SCMI status value returned to caller
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*/
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void scmi_status_response(struct scmi_msg *msg, int32_t status);
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#endif /* SCMI_MSG_COMMON_H */
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