1 // SPDX-License-Identifier: BSD-3-Clause 2 /* 3 * Copyright (c) 2015-2019, Arm Limited and Contributors. All rights reserved. 4 * Copyright (c) 2019, Linaro Limited 5 */ 6 #include <drivers/scmi-msg.h> 7 #include <drivers/scmi.h> 8 #include <trace.h> 9 10 #include "base.h" 11 #include "clock.h" 12 #include "common.h" 13 #include "reset_domain.h" 14 #include "voltage_domain.h" 15 16 void scmi_status_response(struct scmi_msg *msg, int32_t status) 17 { 18 assert(msg->out && msg->out_size >= sizeof(int32_t)); 19 20 memcpy(msg->out, &status, sizeof(int32_t)); 21 msg->out_size_out = sizeof(int32_t); 22 } 23 24 void scmi_write_response(struct scmi_msg *msg, void *payload, size_t size) 25 { 26 /* 27 * Output payload shall be at least the size of the status 28 * Output buffer shall be at least be the size of the status 29 * Output paylaod shall fit in output buffer 30 */ 31 assert(payload && size >= sizeof(int32_t) && size <= msg->out_size && 32 msg->out && msg->out_size >= sizeof(int32_t)); 33 34 memcpy(msg->out, payload, size); 35 msg->out_size_out = size; 36 } 37 38 void scmi_process_message(struct scmi_msg *msg) 39 { 40 scmi_msg_handler_t handler = NULL; 41 42 switch (msg->protocol_id) { 43 case SCMI_PROTOCOL_ID_BASE: 44 handler = scmi_msg_get_base_handler(msg); 45 break; 46 case SCMI_PROTOCOL_ID_CLOCK: 47 handler = scmi_msg_get_clock_handler(msg); 48 break; 49 case SCMI_PROTOCOL_ID_RESET_DOMAIN: 50 handler = scmi_msg_get_rd_handler(msg); 51 break; 52 case SCMI_PROTOCOL_ID_VOLTAGE_DOMAIN: 53 handler = scmi_msg_get_voltd_handler(msg); 54 break; 55 default: 56 break; 57 } 58 59 if (handler) { 60 handler(msg); 61 return; 62 } 63 64 DMSG("Agent %u Protocol %#x Message %#x: not supported", 65 msg->agent_id, msg->protocol_id, msg->message_id); 66 67 scmi_status_response(msg, SCMI_NOT_SUPPORTED); 68 } 69