include/tee/ta_helper.h

/*
 * Copyright (c) 2019 The Fuchsia Authors
 *
 * SPDX-License-Identifier:	BSD-3-Clause
 */

#ifndef _TA_HELPER_H_
#define _TA_HELPER_H_

#include <common.h>
#include <tee.h>

/**
 * Context about an open session with a particular TA.
 */
struct ta_context {
	struct udevice *tee;
	uint32_t session;
};

/**
 * Connect to TA, call specified function, and close connection.
 */
int ta_call(const struct tee_optee_ta_uuid *uuid, uint32_t func,
	    uint32_t num_params, struct tee_param *params);

/**
 * Connect to a TA and return a context.
 */
int ta_open(const struct tee_optee_ta_uuid *uuid,
	    struct ta_context *out_context);

/**
 * Close an open session with a TA.
 */
void ta_close(struct ta_context *context);

/**
 * Invoke a function provided by a TA.
 */
int ta_invoke(const struct ta_context *context, uint32_t func,
	      uint32_t num_params, struct tee_param *params);

#endif // _TA_HELPER_H_