175 lines
6.3 KiB
C
175 lines
6.3 KiB
C
/*
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* Copyright (c) 2014, STMicroelectronics International N.V.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License Version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef _TEE_KERNEL_API_H
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#define _TEE_KERNEL_API_H
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#include <linux/tee_client_api.h>
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/**
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* struct TEEC_Context - Represents a connection between a client application
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* and a TEE.
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*/
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/*typedef struct {
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char devname[256];
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} TEEC_Context;*/
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/**
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* struct TEEC_Session - Represents a connection between a client application
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* and a trusted application.
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*/
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/*typedef struct {
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void *session;
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} TEEC_Session;*/
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/**
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* TEEC_InitializeContext() - Initializes a context holding connection
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* information on the specific TEE, designated by the name string.
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* @param name A zero-terminated string identifying the TEE to connect to.
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* If name is set to NULL, the default TEE is connected to. NULL
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* is the only supported value in this version of the API
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* implementation.
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*
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* @param context The context structure which is to be initialized.
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*
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* @return TEEC_SUCCESS The initialization was successful.
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* @return TEEC_Result Something failed.
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*/
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TEEC_Result TEEC_InitializeContext(const char *name, TEEC_Context *context);
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/**
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* TEEC_FinalizeContext() - Destroys a context holding connection information
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* on the specific TEE.
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*
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* This function destroys an initialized TEE context, closing the connection
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* between the client application and the TEE. This function must only be
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* called when all sessions related to this TEE context have been closed and
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* all shared memory blocks have been released.
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*
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* @param context The context to be destroyed.
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*/
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void TEEC_FinalizeContext(TEEC_Context *context);
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/**
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* TEEC_OpenSession() - Opens a new session with the specified trusted
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* application.
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*
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* @param context The initialized TEE context structure in which
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* scope to open the session.
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* @param session The session to initialize.
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* @param destination A structure identifying the trusted application
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* with which to open a session.
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*
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* @param connectionMethod The connection method to use.
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* @param connectionData Any data necessary to connect with the chosen
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* connection method. Not supported, should be set to
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* NULL.
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* @param operation An operation structure to use in the session. May
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* be set to NULL to signify no operation structure
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* needed.
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*
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* @param returnOrigin A parameter which will hold the error origin if
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* this function returns any value other than
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* TEEC_SUCCESS.
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*
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* @return TEEC_SUCCESS OpenSession successfully opened a new session.
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* @return TEEC_Result Something failed.
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*
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*/
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TEEC_Result TEEC_OpenSession(TEEC_Context *context,
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TEEC_Session *session,
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const TEEC_UUID *destination,
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uint32_t connectionMethod,
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const void *connectionData,
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TEEC_Operation *operation,
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uint32_t *returnOrigin);
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/**
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* TEEC_CloseSession() - Closes the session which has been opened with the
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* specific trusted application.
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*
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* @param session The opened session to close.
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*/
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void TEEC_CloseSession(TEEC_Session *session);
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/**
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* TEEC_InvokeCommand() - Executes a command in the specified trusted
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* application.
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*
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* @param session A handle to an open connection to the trusted
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* application.
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* @param commandID Identifier of the command in the trusted application
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* to invoke.
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* @param operation An operation structure to use in the invoke command.
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* May be set to NULL to signify no operation structure
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* needed.
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* @param returnOrigin A parameter which will hold the error origin if this
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* function returns any value other than TEEC_SUCCESS.
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*
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* @return TEEC_SUCCESS OpenSession successfully opened a new session.
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* @return TEEC_Result Something failed.
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*/
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TEEC_Result TEEC_InvokeCommand(TEEC_Session *session,
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uint32_t commandID,
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TEEC_Operation *operation,
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uint32_t *returnOrigin);
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/**
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* TEEC_RegisterSharedMemory() - Register a block of existing memory as a
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* shared block within the scope of the specified context.
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*
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* @param context The initialized TEE context structure in which scope to
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* open the session.
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* @param sharedMem pointer to the shared memory structure to register.
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*
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* @return TEEC_SUCCESS The registration was successful.
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* @return TEEC_ERROR_OUT_OF_MEMORY Memory exhaustion.
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* @return TEEC_Result Something failed.
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*/
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TEEC_Result TEEC_RegisterSharedMemory(TEEC_Context *context,
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TEEC_SharedMemory *sharedMem);
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/**
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* TEEC_AllocateSharedMemory() - Allocate shared memory for TEE.
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*
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* @param context The initialized TEE context structure in which scope to
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* open the session.
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* @param sharedMem Pointer to the allocated shared memory.
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*
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* @return TEEC_SUCCESS The registration was successful.
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* @return TEEC_ERROR_OUT_OF_MEMORY Memory exhaustion.
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* @return TEEC_Result Something failed.
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*/
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TEEC_Result TEEC_AllocateSharedMemory(TEEC_Context *context,
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TEEC_SharedMemory *sharedMem);
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/**
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* TEEC_ReleaseSharedMemory() - Free or deregister the shared memory.
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*
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* @param sharedMem Pointer to the shared memory to be freed.
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*/
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void TEEC_ReleaseSharedMemory(TEEC_SharedMemory *sharedMemory);
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#if 0
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/**
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* TEEC_RequestCancellation() - Request the cancellation of a pending open
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* session or command invocation.
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*
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* @param operation Pointer to an operation previously passed to open session
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* or invoke.
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*/
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void TEEC_RequestCancellation(TEEC_Operation *operation);
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#endif
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#endif
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