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 /**
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
20 */
21 struct tee_shm_pool {
22 struct tee_shm_pool_mgr *private_mgr;
23 struct tee_shm_pool_mgr *dma_buf_mgr;
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
67 void teedev_ctx_get(struct tee_context *ctx);
68 void teedev_ctx_put(struct tee_context *ctx);
69
70 #endif /*TEE_PRIVATE_H*/