1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (c) 2015-2016, Linaro Limited
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>
16 * struct tee_shm_pool - shared memory pool
17 * @private_mgr: pool manager for shared memory only between kernel
19 * @dma_buf_mgr: pool manager for shared memory exported to user space
22 struct tee_shm_pool_mgr *private_mgr;
23 struct tee_shm_pool_mgr *dma_buf_mgr;
26 #define TEE_DEVICE_FLAG_REGISTERED 0x1
27 #define TEE_MAX_DEV_NAME_LEN 32
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
45 char name[TEE_MAX_DEV_NAME_LEN];
46 const struct tee_desc *desc;
54 struct completion c_no_users;
55 struct mutex mutex; /* protects num_users and idr */
58 struct tee_shm_pool *pool;
61 int tee_shm_init(void);
63 int tee_shm_get_fd(struct tee_shm *shm);
65 bool tee_device_get(struct tee_device *teedev);
66 void tee_device_put(struct tee_device *teedev);
68 void teedev_ctx_get(struct tee_context *ctx);
69 void teedev_ctx_put(struct tee_context *ctx);
71 #endif /*TEE_PRIVATE_H*/