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 user space shared memory objects allocated or
41 *		registered on this device
42 * @pool:	shared memory pool
43 */
44struct tee_device {
45	char name[TEE_MAX_DEV_NAME_LEN];
46	const struct tee_desc *desc;
47	int id;
48	unsigned int flags;
49
50	struct device dev;
51	struct cdev cdev;
52
53	size_t num_users;
54	struct completion c_no_users;
55	struct mutex mutex;	/* protects num_users and idr */
56
57	struct idr idr;
58	struct tee_shm_pool *pool;
59};
60
61int tee_shm_init(void);
62
63int tee_shm_get_fd(struct tee_shm *shm);
64
65bool tee_device_get(struct tee_device *teedev);
66void tee_device_put(struct tee_device *teedev);
67
68void teedev_ctx_get(struct tee_context *ctx);
69void teedev_ctx_put(struct tee_context *ctx);
70
71#endif /*TEE_PRIVATE_H*/

 
 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*/