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*/

 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*/