tee_client_api.h

/*
 * Copyright (c) 2014, STMicroelectronics International N.V.
 * All rights reserved.
 * Copyright (c) 2015, Linaro Limited
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
#ifndef TEE_CLIENT_API_H
#define TEE_CLIENT_API_H

#ifdef __cplusplus
extern "C" {
#endif

#include <stdint.h>
#include <stddef.h>
#include <stdbool.h>
#include <limits.h>

/*
 * Defines the number of available memory references in an open session or
 * invoke command operation payload.
 */
#define TEEC_CONFIG_PAYLOAD_REF_COUNT 4

#define TEEC_CONFIG_SHAREDMEM_MAX_SIZE ULONG_MAX

#define TEEC_NONE                   0x00000000
#define TEEC_VALUE_INPUT            0x00000001
#define TEEC_VALUE_OUTPUT           0x00000002
#define TEEC_VALUE_INOUT            0x00000003
#define TEEC_MEMREF_TEMP_INPUT      0x00000005
#define TEEC_MEMREF_TEMP_OUTPUT     0x00000006
#define TEEC_MEMREF_TEMP_INOUT      0x00000007
#define TEEC_MEMREF_WHOLE           0x0000000C
#define TEEC_MEMREF_PARTIAL_INPUT   0x0000000D
#define TEEC_MEMREF_PARTIAL_OUTPUT  0x0000000E
#define TEEC_MEMREF_PARTIAL_INOUT   0x0000000F

#define TEEC_MEM_INPUT   0x00000001
#define TEEC_MEM_OUTPUT  0x00000002

#define TEEC_SUCCESS                0x00000000
#define TEEC_ERROR_GENERIC          0xFFFF0000
#define TEEC_ERROR_ACCESS_DENIED    0xFFFF0001
#define TEEC_ERROR_CANCEL           0xFFFF0002
#define TEEC_ERROR_ACCESS_CONFLICT  0xFFFF0003
#define TEEC_ERROR_EXCESS_DATA      0xFFFF0004
#define TEEC_ERROR_BAD_FORMAT       0xFFFF0005
#define TEEC_ERROR_BAD_PARAMETERS   0xFFFF0006
#define TEEC_ERROR_BAD_STATE        0xFFFF0007
#define TEEC_ERROR_ITEM_NOT_FOUND   0xFFFF0008
#define TEEC_ERROR_NOT_IMPLEMENTED  0xFFFF0009
#define TEEC_ERROR_NOT_SUPPORTED    0xFFFF000A
#define TEEC_ERROR_NO_DATA          0xFFFF000B
#define TEEC_ERROR_OUT_OF_MEMORY    0xFFFF000C
#define TEEC_ERROR_BUSY             0xFFFF000D
#define TEEC_ERROR_COMMUNICATION    0xFFFF000E
#define TEEC_ERROR_SECURITY         0xFFFF000F
#define TEEC_ERROR_SHORT_BUFFER     0xFFFF0010
#define TEEC_ERROR_EXTERNAL_CANCEL  0xFFFF0011
#define TEEC_ERROR_TARGET_DEAD      0xFFFF3024

#define TEEC_ORIGIN_API          0x00000001
#define TEEC_ORIGIN_COMMS        0x00000002
#define TEEC_ORIGIN_TEE          0x00000003
#define TEEC_ORIGIN_TRUSTED_APP  0x00000004

#define TEEC_LOGIN_PUBLIC       0x00000000
#define TEEC_LOGIN_USER         0x00000001
#define TEEC_LOGIN_GROUP        0x00000002
#define TEEC_LOGIN_APPLICATION  0x00000004
#define TEEC_LOGIN_USER_APPLICATION  0x00000005
#define TEEC_LOGIN_GROUP_APPLICATION  0x00000006

#define TEEC_PARAM_TYPES(p0, p1, p2, p3) \
    ((p0) | ((p1) << 4) | ((p2) << 8) | ((p3) << 12))

#define TEEC_PARAM_TYPE_GET(p, i) (((p) >> (i * 4)) & 0xF)

typedef uint32_t TEEC_Result;

typedef struct {
    /* Implementation defined */
    int fd;
    bool reg_mem;
} TEEC_Context;

typedef struct {
    uint32_t timeLow;
    uint16_t timeMid;
    uint16_t timeHiAndVersion;
    uint8_t clockSeqAndNode[8];
} TEEC_UUID;

typedef struct {
    void *buffer;
    size_t size;
    uint32_t flags;
    /*
     * Implementation-Defined
     */
    int id;
    size_t alloced_size;
    void *shadow_buffer;
    int registered_fd;
    bool buffer_allocated;
} TEEC_SharedMemory;

typedef struct {
    void *buffer;
    size_t size;
} TEEC_TempMemoryReference;

typedef struct {
    TEEC_SharedMemory *parent;
    size_t size;
    size_t offset;
} TEEC_RegisteredMemoryReference;

typedef struct {
    uint32_t a;
    uint32_t b;
} TEEC_Value;

typedef union {
    TEEC_TempMemoryReference tmpref;
    TEEC_RegisteredMemoryReference memref;
    TEEC_Value value;
} TEEC_Parameter;

typedef struct {
    /* Implementation defined */
    TEEC_Context *ctx;
    uint32_t session_id;
} TEEC_Session;

typedef struct {
    uint32_t started;
    uint32_t paramTypes;
    TEEC_Parameter params[TEEC_CONFIG_PAYLOAD_REF_COUNT];
    /* Implementation-Defined */
    TEEC_Session *session;
} TEEC_Operation;

TEEC_Result TEEC_InitializeContext(const char *name, TEEC_Context *context);

void TEEC_FinalizeContext(TEEC_Context *context);

TEEC_Result TEEC_OpenSession(TEEC_Context *context,
                 TEEC_Session *session,
                 const TEEC_UUID *destination,
                 uint32_t connectionMethod,
                 const void *connectionData,
                 TEEC_Operation *operation,
                 uint32_t *returnOrigin);

void TEEC_CloseSession(TEEC_Session *session);

TEEC_Result TEEC_InvokeCommand(TEEC_Session *session,
                   uint32_t commandID,
                   TEEC_Operation *operation,
                   uint32_t *returnOrigin);

TEEC_Result TEEC_RegisterSharedMemory(TEEC_Context *context,
                      TEEC_SharedMemory *sharedMem);

TEEC_Result TEEC_AllocateSharedMemory(TEEC_Context *context,
                      TEEC_SharedMemory *sharedMem);

void TEEC_ReleaseSharedMemory(TEEC_SharedMemory *sharedMemory);

void TEEC_RequestCancellation(TEEC_Operation *operation);

#ifdef __cplusplus
}
#endif

#endif