1 /* 2 * Copyright (c) 2014, STMicroelectronics International N.V. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 11 * 2. Redistributions in binary form must reproduce the above copyright notice, 12 * this list of conditions and the following disclaimer in the documentation 13 * and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 * POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifndef TEE_FS_H 29 #define TEE_FS_H 30 31 #include <stddef.h> 32 #include <stdint.h> 33 34 #define TEE_FS_NAME_MAX 350 35 36 /* 37 * We split a TEE file into multiple blocks and stored 38 * on REE filesystem. TEE file is represented by small 39 * REE files and a special file called meta, which is used 40 * to concatenate multiple REE files. 41 * 42 * Thus, REE file path should be slightly longer than 43 * TEE file path, it's name should look like: 44 * 45 * <tee_file_name>/meta 46 * <tee_file_name>/block0 47 * ... 48 * <tee_file_name>/block15 49 */ 50 #define REE_FS_NAME_MAX (TEE_FS_NAME_MAX + 20) 51 52 typedef int tee_fs_off_t; 53 typedef uint32_t tee_fs_mode_t; 54 typedef struct tee_fs_dir tee_fs_dir; 55 56 struct tee_fs_dirent { 57 char *d_name; 58 }; 59 60 /* 61 * tee_fs implemets a POSIX like secure file system 62 */ 63 struct tee_file_operations { 64 int (*open)(const char *file, int flags, ...); 65 int (*close)(int fd); 66 int (*read)(int fd, void *buf, size_t len); 67 int (*write)(int fd, const void *buf, size_t len); 68 tee_fs_off_t (*lseek)(int fd, tee_fs_off_t offset, int whence); 69 int (*rename)(const char *old, const char *new); 70 int (*unlink)(const char *file); 71 int (*ftruncate)(int fd, tee_fs_off_t length); 72 int (*mkdir)(const char *path, tee_fs_mode_t mode); 73 tee_fs_dir *(*opendir)(const char *name); 74 int (*closedir)(tee_fs_dir *d); 75 struct tee_fs_dirent *(*readdir)(tee_fs_dir *d); 76 int (*rmdir)(const char *pathname); 77 int (*access)(const char *name, int mode); 78 }; 79 80 struct tee_fs_rpc { 81 int op; 82 int flags; 83 int arg; 84 int fd; 85 uint32_t len; 86 int res; 87 }; 88 89 extern struct tee_file_operations tee_file_ops; 90 91 int tee_fs_send_cmd(struct tee_fs_rpc *bf_cmd, void *data, uint32_t len, 92 uint32_t mode); 93 94 #endif 95