/* SPDX-License-Identifier: MIT */
/*
* Copyright 2019 Advanced Micro Devices , Inc .
*/
/*
* This file has definitions related to Host and AMD - TEE Trusted OS interface .
* These definitions must match the definitions on the TEE side .
*/
#ifndef AMDTEE_IF_H
#define AMDTEE_IF_H
#include <linux/types.h>
/*****************************************************************************
* * TEE Param
******************************************************************************/
#define TEE_MAX_PARAMS 4
/**
* struct memref - memory reference structure
* @ buf_id : buffer ID of the buffer mapped by TEE_CMD_ID_MAP_SHARED_MEM
* @ offset : offset in bytes from beginning of the buffer
* @ size : data size in bytes
*/
struct memref {
u32 buf_id;
u32 offset;
u32 size;
};
struct value {
u32 a;
u32 b;
};
/*
* Parameters passed to open_session or invoke_command
*/
union tee_op_param {
struct memref mref;
struct value val;
};
struct tee_operation {
u32 param_types;
union tee_op_param params[TEE_MAX_PARAMS];
};
/* Must be same as in GP TEE specification */
#define TEE_OP_PARAM_TYPE_NONE 0
#define TEE_OP_PARAM_TYPE_VALUE_INPUT 1
#define TEE_OP_PARAM_TYPE_VALUE_OUTPUT 2
#define TEE_OP_PARAM_TYPE_VALUE_INOUT 3
#define TEE_OP_PARAM_TYPE_INVALID 4
#define TEE_OP_PARAM_TYPE_MEMREF_INPUT 5
#define TEE_OP_PARAM_TYPE_MEMREF_OUTPUT 6
#define TEE_OP_PARAM_TYPE_MEMREF_INOUT 7
#define TEE_PARAM_TYPE_GET(t, i) (((t) >> ((i) * 4 )) & 0 xF)
#define TEE_PARAM_TYPES(t0, t1, t2, t3) \
((t0) | ((t1) << 4 ) | ((t2) << 8 ) | ((t3) << 12 ))
/*****************************************************************************
* * TEE Commands
*****************************************************************************/
/*
* The shared memory between rich world and secure world may be physically
* non - contiguous . Below structures are meant to describe a shared memory region
* via scatter / gather ( sg ) list
*/
/**
* struct tee_sg_desc - sg descriptor for a physically contiguous buffer
* @ low_addr : [ in ] bits [ 31 : 0 ] of buffer ' s physical address . Must be 4 KB aligned
* @ hi_addr : [ in ] bits [ 63 : 32 ] of the buffer ' s physical address
* @ size : [ in ] size in bytes ( must be multiple of 4 KB )
*/
struct tee_sg_desc {
u32 low_addr;
u32 hi_addr;
u32 size;
};
/**
* struct tee_sg_list - structure describing a scatter / gather list
* @ count : [ in ] number of sg descriptors
* @ size : [ in ] total size of all buffers in the list . Must be multiple of 4 KB
* @ buf : [ in ] list of sg buffer descriptors
*/
#define TEE_MAX_SG_DESC 64
struct tee_sg_list {
u32 count;
u32 size;
struct tee_sg_desc buf[TEE_MAX_SG_DESC];
};
/**
* struct tee_cmd_map_shared_mem - command to map shared memory
* @ buf_id : [ out ] return buffer ID value
* @ sg_list : [ in ] list describing memory to be mapped
*/
struct tee_cmd_map_shared_mem {
u32 buf_id;
struct tee_sg_list sg_list;
};
/**
* struct tee_cmd_unmap_shared_mem - command to unmap shared memory
* @ buf_id : [ in ] buffer ID of memory to be unmapped
*/
struct tee_cmd_unmap_shared_mem {
u32 buf_id;
};
/**
* struct tee_cmd_load_ta - load Trusted Application ( TA ) binary into TEE
* @ low_addr : [ in ] bits [ 31 : 0 ] of the physical address of the TA binary
* @ hi_addr : [ in ] bits [ 63 : 32 ] of the physical address of the TA binary
* @ size : [ in ] size of TA binary in bytes
* @ ta_handle : [ out ] return handle of the loaded TA
* @ return_origin : [ out ] origin of return code after TEE processing
*/
struct tee_cmd_load_ta {
u32 low_addr;
u32 hi_addr;
u32 size;
u32 ta_handle;
u32 return_origin;
};
/**
* struct tee_cmd_unload_ta - command to unload TA binary from TEE environment
* @ ta_handle : [ in ] handle of the loaded TA to be unloaded
*/
struct tee_cmd_unload_ta {
u32 ta_handle;
};
/**
* struct tee_cmd_open_session - command to call TA_OpenSessionEntryPoint in TA
* @ ta_handle : [ in ] handle of the loaded TA
* @ session_info : [ out ] pointer to TA allocated session data
* @ op : [ in / out ] operation parameters
* @ return_origin : [ out ] origin of return code after TEE processing
*/
struct tee_cmd_open_session {
u32 ta_handle;
u32 session_info;
struct tee_operation op;
u32 return_origin;
};
/**
* struct tee_cmd_close_session - command to call TA_CloseSessionEntryPoint ( )
* in TA
* @ ta_handle : [ in ] handle of the loaded TA
* @ session_info : [ in ] pointer to TA allocated session data
*/
struct tee_cmd_close_session {
u32 ta_handle;
u32 session_info;
};
/**
* struct tee_cmd_invoke_cmd - command to call TA_InvokeCommandEntryPoint ( ) in
* TA
* @ ta_handle : [ in ] handle of the loaded TA
* @ cmd_id : [ in ] TA command ID
* @ session_info : [ in ] pointer to TA allocated session data
* @ op : [ in / out ] operation parameters
* @ return_origin : [ out ] origin of return code after TEE processing
*/
struct tee_cmd_invoke_cmd {
u32 ta_handle;
u32 cmd_id;
u32 session_info;
struct tee_operation op;
u32 return_origin;
};
#endif /*AMDTEE_IF_H*/
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