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9c92ab61 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
967c9cca JW |
2 | /* |
3 | * Copyright (c) 2015-2016, Linaro Limited | |
967c9cca JW |
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 | ||
967c9cca JW |
15 | /** |
16 | * struct tee_shm_pool - shared memory pool | |
17 | * @private_mgr: pool manager for shared memory only between kernel | |
18 | * and secure world | |
19 | * @dma_buf_mgr: pool manager for shared memory exported to user space | |
967c9cca JW |
20 | */ |
21 | struct tee_shm_pool { | |
e2aca5d8 JW |
22 | struct tee_shm_pool_mgr *private_mgr; |
23 | struct tee_shm_pool_mgr *dma_buf_mgr; | |
967c9cca JW |
24 | }; |
25 | ||
26 | #define TEE_DEVICE_FLAG_REGISTERED 0x1 | |
27 | #define TEE_MAX_DEV_NAME_LEN 32 | |
28 | ||
29 | /** | |
30 | * struct tee_device - TEE Device representation | |
31 | * @name: name of device | |
32 | * @desc: description of device | |
33 | * @id: unique id of device | |
34 | * @flags: represented by TEE_DEVICE_FLAG_REGISTERED above | |
35 | * @dev: embedded basic device structure | |
36 | * @cdev: embedded cdev | |
37 | * @num_users: number of active users of this device | |
38 | * @c_no_user: completion used when unregistering the device | |
39 | * @mutex: mutex protecting @num_users and @idr | |
40 | * @idr: register of shared memory object allocated on this device | |
41 | * @pool: shared memory pool | |
42 | */ | |
43 | struct tee_device { | |
44 | char name[TEE_MAX_DEV_NAME_LEN]; | |
45 | const struct tee_desc *desc; | |
46 | int id; | |
47 | unsigned int flags; | |
48 | ||
49 | struct device dev; | |
50 | struct cdev cdev; | |
51 | ||
52 | size_t num_users; | |
53 | struct completion c_no_users; | |
54 | struct mutex mutex; /* protects num_users and idr */ | |
55 | ||
56 | struct idr idr; | |
57 | struct tee_shm_pool *pool; | |
58 | }; | |
59 | ||
60 | int tee_shm_init(void); | |
61 | ||
62 | int tee_shm_get_fd(struct tee_shm *shm); | |
63 | ||
64 | bool tee_device_get(struct tee_device *teedev); | |
65 | void tee_device_put(struct tee_device *teedev); | |
66 | ||
217e0250 VB |
67 | void teedev_ctx_get(struct tee_context *ctx); |
68 | void teedev_ctx_put(struct tee_context *ctx); | |
69 | ||
967c9cca | 70 | #endif /*TEE_PRIVATE_H*/ |