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/* SPDX-License-Identifier: BSD-2-Clause */
/*
* Copyright (c) 2016-2021, Linaro Limited
*/
#ifndef __OPTEE_RPC_CMD_H
#define __OPTEE_RPC_CMD_H
/*
* All RPC is done with a struct optee_msg_arg as bearer of information,
* struct optee_msg_arg::arg holds values defined by OPTEE_RPC_CMD_* below.
* Only the commands handled by the kernel driver are defined here.
*
* RPC communication with tee-supplicant is reversed compared to normal
* client communication described above. The supplicant receives requests
* and sends responses.
*/
/*
* Get time
*
* Returns number of seconds and nano seconds since the Epoch,
* 1970-01-01 00:00:00 +0000 (UTC).
*
* [out] value[0].a Number of seconds
* [out] value[0].b Number of nano seconds.
*/
#define OPTEE_RPC_CMD_GET_TIME 3
/*
* Notification from/to secure world.
*
* If secure world needs to wait for something, for instance a mutex, it
* does a notification wait request instead of spinning in secure world.
* Conversely can a synchronous notification can be sent when a secure
* world mutex with a thread waiting thread is unlocked.
*
* This interface can also be used to wait for a asynchronous notification
* which instead is sent via a non-secure interrupt.
*
* Waiting on notification
* [in] value[0].a OPTEE_RPC_NOTIFICATION_WAIT
* [in] value[0].b notification value
* [in] value[0].c timeout in milliseconds or 0 if no timeout
*
* Sending a synchronous notification
* [in] value[0].a OPTEE_RPC_NOTIFICATION_SEND
* [in] value[0].b notification value
*/
#define OPTEE_RPC_CMD_NOTIFICATION 4
#define OPTEE_RPC_NOTIFICATION_WAIT 0
#define OPTEE_RPC_NOTIFICATION_SEND 1
/*
* Suspend execution
*
* [in] value[0].a Number of milliseconds to suspend
*/
#define OPTEE_RPC_CMD_SUSPEND 5
/*
* Allocate a piece of shared memory
*
* [in] value[0].a Type of memory one of
* OPTEE_RPC_SHM_TYPE_* below
* [in] value[0].b Requested size
* [in] value[0].c Required alignment
* [out] memref[0] Buffer
*/
#define OPTEE_RPC_CMD_SHM_ALLOC 6
/* Memory that can be shared with a non-secure user space application */
#define OPTEE_RPC_SHM_TYPE_APPL 0
/* Memory only shared with non-secure kernel */
#define OPTEE_RPC_SHM_TYPE_KERNEL 1
/*
* Free shared memory previously allocated with OPTEE_RPC_CMD_SHM_ALLOC
*
* [in] value[0].a Type of memory one of
* OPTEE_RPC_SHM_TYPE_* above
* [in] value[0].b Value of shared memory reference or cookie
*/
#define OPTEE_RPC_CMD_SHM_FREE 7
/*
* Issue master requests (read and write operations) to an I2C chip.
*
* [in] value[0].a Transfer mode (OPTEE_RPC_I2C_TRANSFER_*)
* [in] value[0].b The I2C bus (a.k.a adapter).
* 16 bit field.
* [in] value[0].c The I2C chip (a.k.a address).
* 16 bit field (either 7 or 10 bit effective).
* [in] value[1].a The I2C master control flags (ie, 10 bit address).
* 16 bit field.
* [in/out] memref[2] Buffer used for data transfers.
* [out] value[3].a Number of bytes transferred by the REE.
*/
#define OPTEE_RPC_CMD_I2C_TRANSFER 21
/* I2C master transfer modes */
#define OPTEE_RPC_I2C_TRANSFER_RD 0
#define OPTEE_RPC_I2C_TRANSFER_WR 1
/* I2C master control flags */
#define OPTEE_RPC_I2C_FLAGS_TEN_BIT BIT(0)
#endif /*__OPTEE_RPC_CMD_H*/
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