1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
2 | /* |
3 | * Copyright (c) 2015-2016, Linaro Limited |
4 | */ |
5 | #ifndef TEE_PRIVATE_H |
6 | #define TEE_PRIVATE_H |
7 | |
8 | #include <linux/cdev.h> |
9 | #include <linux/completion.h> |
10 | #include <linux/device.h> |
11 | #include <linux/kref.h> |
12 | #include <linux/mutex.h> |
13 | #include <linux/types.h> |
14 | |
15 | #define TEE_DEVICE_FLAG_REGISTERED 0x1 |
16 | #define TEE_MAX_DEV_NAME_LEN 32 |
17 | |
18 | /** |
19 | * struct tee_device - TEE Device representation |
20 | * @name: name of device |
21 | * @desc: description of device |
22 | * @id: unique id of device |
23 | * @flags: represented by TEE_DEVICE_FLAG_REGISTERED above |
24 | * @dev: embedded basic device structure |
25 | * @cdev: embedded cdev |
26 | * @num_users: number of active users of this device |
27 | * @c_no_user: completion used when unregistering the device |
28 | * @mutex: mutex protecting @num_users and @idr |
29 | * @idr: register of user space shared memory objects allocated or |
30 | * registered on this device |
31 | * @pool: shared memory pool |
32 | */ |
33 | struct tee_device { |
34 | char name[TEE_MAX_DEV_NAME_LEN]; |
35 | const struct tee_desc *desc; |
36 | int id; |
37 | unsigned int flags; |
38 | |
39 | struct device dev; |
40 | struct cdev cdev; |
41 | |
42 | size_t num_users; |
43 | struct completion c_no_users; |
44 | struct mutex mutex; /* protects num_users and idr */ |
45 | |
46 | struct idr idr; |
47 | struct tee_shm_pool *pool; |
48 | }; |
49 | |
50 | int tee_shm_get_fd(struct tee_shm *shm); |
51 | |
52 | bool tee_device_get(struct tee_device *teedev); |
53 | void tee_device_put(struct tee_device *teedev); |
54 | |
55 | void teedev_ctx_get(struct tee_context *ctx); |
56 | void teedev_ctx_put(struct tee_context *ctx); |
57 | |
58 | struct tee_shm *tee_shm_alloc_user_buf(struct tee_context *ctx, size_t size); |
59 | struct tee_shm *tee_shm_register_user_buf(struct tee_context *ctx, |
60 | unsigned long addr, size_t length); |
61 | |
62 | #endif /*TEE_PRIVATE_H*/ |
63 | |