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// SPDX-License-Identifier: BSD-3-Clause
/*
* Copyright (c) 2015-2020, Arm Limited and Contributors. All rights reserved.
* Copyright (c) 2019-2020, Linaro Limited
*/
#include <cdefs.h>
#include <string.h>
#include <drivers/scmi-msg.h>
#include <drivers/scmi.h>
#include <lib/utils.h>
#include <lib/utils_def.h>
#include "common.h"
static bool message_id_is_supported(unsigned int message_id);
#pragma weak plat_scmi_rstd_count
#pragma weak plat_scmi_rstd_get_name
#pragma weak plat_scmi_rstd_autonomous
#pragma weak plat_scmi_rstd_set_state
size_t plat_scmi_rstd_count(unsigned int agent_id __unused)
{
return 0U;
}
const char *plat_scmi_rstd_get_name(unsigned int agent_id __unused,
unsigned int scmi_id __unused)
{
return NULL;
}
int32_t plat_scmi_rstd_autonomous(unsigned int agent_id __unused,
unsigned int scmi_id __unused,
unsigned int state __unused)
{
return SCMI_NOT_SUPPORTED;
}
int32_t plat_scmi_rstd_set_state(unsigned int agent_id __unused,
unsigned int scmi_id __unused,
bool assert_not_deassert __unused)
{
return SCMI_NOT_SUPPORTED;
}
static void report_version(struct scmi_msg *msg)
{
struct scmi_protocol_version_p2a return_values = {
.status = SCMI_SUCCESS,
.version = SCMI_PROTOCOL_VERSION_RESET_DOMAIN,
};
if (msg->in_size != 0U) {
scmi_status_response(msg, SCMI_PROTOCOL_ERROR);
return;
}
scmi_write_response(msg, &return_values, sizeof(return_values));
}
static void report_attributes(struct scmi_msg *msg)
{
struct scmi_protocol_attributes_p2a return_values = {
.status = SCMI_SUCCESS,
.attributes = plat_scmi_rstd_count(msg->agent_id),
};
if (msg->in_size != 0U) {
scmi_status_response(msg, SCMI_PROTOCOL_ERROR);
return;
}
scmi_write_response(msg, &return_values, sizeof(return_values));
}
static void report_message_attributes(struct scmi_msg *msg)
{
struct scmi_protocol_message_attributes_a2p *in_args = (void *)msg->in;
struct scmi_protocol_message_attributes_p2a return_values = {
.status = SCMI_SUCCESS,
/* For this protocol, attributes shall be zero */
.attributes = 0U,
};
if (msg->in_size != sizeof(*in_args)) {
scmi_status_response(msg, SCMI_PROTOCOL_ERROR);
return;
}
if (!message_id_is_supported(in_args->message_id)) {
scmi_status_response(msg, SCMI_NOT_FOUND);
return;
}
scmi_write_response(msg, &return_values, sizeof(return_values));
}
static void reset_domain_attributes(struct scmi_msg *msg)
{
struct scmi_reset_domain_attributes_a2p *in_args = (void *)msg->in;
struct scmi_reset_domain_attributes_p2a return_values;
const char *name = NULL;
unsigned int domain_id = 0U;
if (msg->in_size != sizeof(*in_args)) {
scmi_status_response(msg, SCMI_PROTOCOL_ERROR);
return;
}
domain_id = SPECULATION_SAFE_VALUE(in_args->domain_id);
if (domain_id >= plat_scmi_rstd_count(msg->agent_id)) {
scmi_status_response(msg, SCMI_INVALID_PARAMETERS);
return;
}
name = plat_scmi_rstd_get_name(msg->agent_id, domain_id);
if (name == NULL) {
scmi_status_response(msg, SCMI_NOT_FOUND);
return;
}
zeromem(&return_values, sizeof(return_values));
COPY_NAME_IDENTIFIER(return_values.name, name);
return_values.status = SCMI_SUCCESS;
return_values.flags = 0U; /* Async and Notif are not supported */
return_values.latency = SCMI_RESET_DOMAIN_ATTR_UNK_LAT;
scmi_write_response(msg, &return_values, sizeof(return_values));
}
static void reset_request(struct scmi_msg *msg)
{
struct scmi_reset_domain_request_a2p *in_args = (void *)msg->in;
struct scmi_reset_domain_request_p2a out_args = {
.status = SCMI_SUCCESS,
};
unsigned int domain_id = 0U;
if (msg->in_size != sizeof(*in_args)) {
scmi_status_response(msg, SCMI_PROTOCOL_ERROR);
return;
}
domain_id = SPECULATION_SAFE_VALUE(in_args->domain_id);
if (domain_id >= plat_scmi_rstd_count(msg->agent_id)) {
scmi_status_response(msg, SCMI_NOT_FOUND);
return;
}
if ((in_args->flags & SCMI_RESET_DOMAIN_AUTO) != 0U) {
out_args.status = plat_scmi_rstd_autonomous(msg->agent_id,
domain_id,
in_args->reset_state);
} else if ((in_args->flags & SCMI_RESET_DOMAIN_EXPLICIT) != 0U) {
out_args.status = plat_scmi_rstd_set_state(msg->agent_id,
domain_id, true);
} else {
out_args.status = plat_scmi_rstd_set_state(msg->agent_id,
domain_id, false);
}
if (out_args.status != SCMI_SUCCESS) {
scmi_status_response(msg, out_args.status);
} else {
scmi_write_response(msg, &out_args, sizeof(out_args));
}
}
static const scmi_msg_handler_t scmi_rstd_handler_table[] = {
[SCMI_PROTOCOL_VERSION] = report_version,
[SCMI_PROTOCOL_ATTRIBUTES] = report_attributes,
[SCMI_PROTOCOL_MESSAGE_ATTRIBUTES] = report_message_attributes,
[SCMI_RESET_DOMAIN_ATTRIBUTES] = reset_domain_attributes,
[SCMI_RESET_DOMAIN_REQUEST] = reset_request,
};
static bool message_id_is_supported(unsigned int message_id)
{
return (message_id < ARRAY_SIZE(scmi_rstd_handler_table)) &&
(scmi_rstd_handler_table[message_id] != NULL);
}
scmi_msg_handler_t scmi_msg_get_rstd_handler(struct scmi_msg *msg)
{
unsigned int message_id = SPECULATION_SAFE_VALUE(msg->message_id);
if (message_id >= ARRAY_SIZE(scmi_rstd_handler_table)) {
VERBOSE("Reset domain handle not found %u\n", msg->message_id);
return NULL;
}
return scmi_rstd_handler_table[message_id];
}
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