/*
 * Copyright (c) 2014, STMicroelectronics International N.V.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License Version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 */
#ifndef _TEE_IOC_H
#define _TEE_IOC_H

#include <linux/tee_client_api.h>

#ifndef __KERNEL__
#define __user
#endif

/**
 * struct tee_cmd_io - The command sent to an open tee device.
 * @err: Error code (as in Global Platform TEE Client API spec)
 * @origin: Origin for the error code (also from spec).
 * @cmd: The command to be executed in the trusted application.
 * @uuid: The uuid for the trusted application.
 * @data: The trusted application or memory block.
 * @data_size: The size of the trusted application or memory block.
 * @op: The cmd payload operation for the trusted application.
 *
 * This structure is mainly used in the Linux kernel for communication
 * with the user space.
 */
struct tee_cmd_io {
	TEEC_Result err;
	uint32_t origin;
	uint32_t cmd;
	int fd_sess;
	/*
	 * Here fd_sess is 32-bit variable. Since TEEC_Result also is defined as
	 * "uint32_t", this structure is aligned.
	 */
	union {
		TEEC_UUID __user *uuid;
		uint64_t padding_uuid;
	};
	union {
		void __user *data;
		uint64_t padding_data;
	};
	union {
		TEEC_Operation __user *op;
		uint64_t padding_op;
	};
	uint32_t data_size;
	int32_t reserved;
};

struct tee_shm_io {
	union {
		void __user *buffer;
		uint64_t padding_buf;
	};
	uint32_t size;
	uint32_t flags;
	/*
	 * Here fd_shm is 32-bit. To be compliant with the convention of file
	 * descriptor definition, fd_shm is defined as "int" type other
	 * than "int32_t". Even though using "int32_t" is more obvious to
	 * indicate that we intend to keep this structure aligned.
	 */
	int fd_shm;
	uint32_t registered;
};

#define TEE_OPEN_SESSION_IOC		_IOWR('t', 161, struct tee_cmd_io)
#define TEE_INVOKE_COMMAND_IOC		_IOWR('t', 163, struct tee_cmd_io)
#define TEE_REQUEST_CANCELLATION_IOC	_IOWR('t', 164, struct tee_cmd_io)
#define TEE_ALLOC_SHM_IOC		_IOWR('t', 165, struct tee_shm_io)
#define TEE_GET_FD_FOR_RPC_SHM_IOC	_IOWR('t', 167, struct tee_shm_io)

#endif /* _TEE_IOC_H */