tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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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 */
21struct 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 */
43struct 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
60int tee_shm_init(void);
61
62int tee_shm_get_fd(struct tee_shm *shm);
63
64bool tee_device_get(struct tee_device *teedev);
65void tee_device_put(struct tee_device *teedev);
66
67void teedev_ctx_get(struct tee_context *ctx);
68void teedev_ctx_put(struct tee_context *ctx);
69
70#endif /*TEE_PRIVATE_H*/