drivers/misc/optee.h

/****************************************************************************
 * drivers/misc/optee.h
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.  The
 * ASF licenses this file to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the
 * License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations
 * under the License.
 *
 ****************************************************************************/

#ifndef __DRIVERS_MISC_OPTEE_H
#define __DRIVERS_MISC_OPTEE_H

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <nuttx/tee.h>
#include <nuttx/idr.h>

#include "optee_msg.h"

/****************************************************************************
 * Pre-processor Definitions
 ****************************************************************************/

/* Some GlobalPlatform error codes used in this driver */

#define TEE_SUCCESS                    0x00000000
#define TEE_ERROR_ACCESS_DENIED        0xFFFF0001
#define TEE_ERROR_BAD_FORMAT           0xFFFF0005
#define TEE_ERROR_BAD_PARAMETERS       0xFFFF0006
#define TEE_ERROR_GENERIC              0xFFFF0000
#define TEE_ERROR_NOT_SUPPORTED        0xFFFF000A
#define TEE_ERROR_OUT_OF_MEMORY        0xFFFF000C
#define TEE_ERROR_BUSY                 0xFFFF000D
#define TEE_ERROR_COMMUNICATION        0xFFFF000E
#define TEE_ERROR_SECURITY             0xFFFF000F
#define TEE_ERROR_SHORT_BUFFER         0xFFFF0010
#define TEE_ERROR_TIMEOUT              0xFFFF3001

#define TEE_ORIGIN_COMMS               0x00000002

#define OPTEE_SERVER_PATH              "optee"
#define OPTEE_MAX_PARAM_NUM            6

/****************************************************************************
 * Public Types
 ****************************************************************************/

enum optee_role_e
{
  OPTEE_ROLE_CA,              /* /dev/tee0   */
  OPTEE_ROLE_SUPPLICANT,      /* /dev/tee-supp0 */
};

struct optee_priv_data
{
  uintptr_t alignment;        /* Transport-specified message alignment */
  FAR struct idr_s *shms;     /* An RB tree of process local shm entries */
  enum optee_role_e role;
};

struct optee_shm
{
  FAR struct optee_priv_data *priv;
  int fd;
  int32_t id;
  uint64_t vaddr;
  uint64_t paddr;
  uint64_t length;
  FAR void *page_list;
  uint32_t flags;
};

/****************************************************************************
 * Public Functions Definitions
 ****************************************************************************/

#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif

#ifdef CONFIG_ARCH_ADDRENV
uintptr_t optee_va_to_pa(FAR const void *va);
#else
#  define optee_va_to_pa(va) ((uintptr_t)va)
#endif
int optee_shm_alloc(FAR struct optee_priv_data *priv, FAR void *addr,
                    size_t size, uint32_t flags,
                    FAR struct optee_shm **shmp);
void optee_shm_free(FAR struct optee_shm *shm);
int optee_transport_init(void);
int optee_transport_open(FAR struct optee_priv_data **priv);
void optee_transport_close(FAR struct optee_priv_data *priv);

int optee_transport_call(FAR struct optee_priv_data *priv,
                         FAR struct optee_msg_arg *arg);

int optee_from_msg_param(FAR struct tee_ioctl_param *params,
                         size_t num_params,
                         FAR const struct optee_msg_param *mparams);

int optee_to_msg_param(FAR struct optee_priv_data *priv,
                       FAR struct optee_msg_param *mparams,
                       size_t num_params,
                       FAR const struct tee_ioctl_param *params);

int optee_convert_to_errno(uint32_t oterr);
uint32_t optee_convert_from_errno(int err);
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __DRIVERS_MISC_OPTEE_H */