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/* 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)) & 0xF)
#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 4KB aligned
* @hi_addr: [in] bits[63:32] of the buffer's physical address
* @size: [in] size in bytes (must be multiple of 4KB)
*/
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 4KB
* @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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