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/*
* Copyright (c) 2022, Arm Limited. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*
*/
#ifndef __RSS_COMMS_PROTOCOL_H__
#define __RSS_COMMS_PROTOCOL_H__
#include <cdefs.h>
#include <stdint.h>
#include <psa/client.h>
#include "rss_comms_protocol_embed.h"
#include "rss_comms_protocol_pointer_access.h"
enum rss_comms_protocol_version_t {
RSS_COMMS_PROTOCOL_EMBED = 0,
RSS_COMMS_PROTOCOL_POINTER_ACCESS = 1,
};
struct __packed serialized_rss_comms_header_t {
uint8_t protocol_ver;
uint8_t seq_num;
uint16_t client_id;
};
/* MHU message passed from Host to RSS to deliver a PSA client call */
struct __packed serialized_rss_comms_msg_t {
struct serialized_rss_comms_header_t header;
union __packed {
struct rss_embed_msg_t embed;
struct rss_pointer_access_msg_t pointer_access;
} msg;
};
/* MHU reply message to hold the PSA client reply result returned by RSS */
struct __packed serialized_rss_comms_reply_t {
struct serialized_rss_comms_header_t header;
union __packed {
struct rss_embed_reply_t embed;
struct rss_pointer_access_reply_t pointer_access;
} reply;
};
/* in_len and out_len are uint8_ts, therefore if there are more than 255 iovecs
* an error may occur.
*/
CASSERT(PSA_MAX_IOVEC <= UINT8_MAX, assert_rss_comms_max_iovec_too_large);
psa_status_t rss_protocol_serialize_msg(psa_handle_t handle,
int16_t type,
const psa_invec *in_vec,
uint8_t in_len,
const psa_outvec *out_vec,
uint8_t out_len,
struct serialized_rss_comms_msg_t *msg,
size_t *msg_len);
psa_status_t rss_protocol_deserialize_reply(psa_outvec *out_vec,
uint8_t out_len,
psa_status_t *return_val,
const struct serialized_rss_comms_reply_t *reply,
size_t reply_size);
#endif /* __RSS_COMMS_PROTOCOL_H__ */
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