1/*
2 * Copyright (c) 2015-2016, Linaro Limited
3 *
4 * This software is licensed under the terms of the GNU General Public
5 * License version 2, as published by the Free Software Foundation, and
6 * may be copied, distributed, and modified under those terms.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 */
14#ifndef TEE_PRIVATE_H
15#define TEE_PRIVATE_H
16
17#include <linux/cdev.h>
18#include <linux/completion.h>
19#include <linux/device.h>
20#include <linux/kref.h>
21#include <linux/mutex.h>
22#include <linux/types.h>
23
24/**
25 * struct tee_shm_pool - shared memory pool
26 * @private_mgr: pool manager for shared memory only between kernel
27 * and secure world
28 * @dma_buf_mgr: pool manager for shared memory exported to user space
29 */
30struct tee_shm_pool {
31 struct tee_shm_pool_mgr *private_mgr;
32 struct tee_shm_pool_mgr *dma_buf_mgr;
33};
34
35#define TEE_DEVICE_FLAG_REGISTERED 0x1
36#define TEE_MAX_DEV_NAME_LEN 32
37
38/**
39 * struct tee_device - TEE Device representation
40 * @name: name of device
41 * @desc: description of device
42 * @id: unique id of device
43 * @flags: represented by TEE_DEVICE_FLAG_REGISTERED above
44 * @dev: embedded basic device structure
45 * @cdev: embedded cdev
46 * @num_users: number of active users of this device
47 * @c_no_user: completion used when unregistering the device
48 * @mutex: mutex protecting @num_users and @idr
49 * @idr: register of shared memory object allocated on this device
50 * @pool: shared memory pool
51 */
52struct tee_device {
53 char name[TEE_MAX_DEV_NAME_LEN];
54 const struct tee_desc *desc;
55 int id;
56 unsigned int flags;
57
58 struct device dev;
59 struct cdev cdev;
60
61 size_t num_users;
62 struct completion c_no_users;
63 struct mutex mutex; /* protects num_users and idr */
64
65 struct idr idr;
66 struct tee_shm_pool *pool;
67};
68
69int tee_shm_init(void);
70
71int tee_shm_get_fd(struct tee_shm *shm);
72
73bool tee_device_get(struct tee_device *teedev);
74void tee_device_put(struct tee_device *teedev);
75
76void teedev_ctx_get(struct tee_context *ctx);
77void teedev_ctx_put(struct tee_context *ctx);
78
79#endif /*TEE_PRIVATE_H*/
80