/* * 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
/***************************************************************************** ** 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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