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 #define TEE_DEVICE_FLAG_REGISTERED 0x1 16 #define TEE_MAX_DEV_NAME_LEN 32 17 18 /** 19 * struct tee_device - TEE Device representation 20 * @name: name of device 21 * @desc: description of device 22 * @id: unique id of device 23 * @flags: represented by TEE_DEVICE_FLAG_REGISTERED above 24 * @dev: embedded basic device structure 25 * @cdev: embedded cdev 26 * @num_users: number of active users of this device 27 * @c_no_user: completion used when unregistering the device 28 * @mutex: mutex protecting @num_users and @idr 29 * @idr: register of user space shared memory objects allocated or 30 * registered on this device 31 * @pool: shared memory pool 32 */ 33 struct tee_device { 34 char name[TEE_MAX_DEV_NAME_LEN]; 35 const struct tee_desc *desc; 36 int id; 37 unsigned int flags; 38 39 struct device dev; 40 struct cdev cdev; 41 42 size_t num_users; 43 struct completion c_no_users; 44 struct mutex mutex; /* protects num_users and idr */ 45 46 struct idr idr; 47 struct tee_shm_pool *pool; 48 }; 49 50 int tee_shm_get_fd(struct tee_shm *shm); 51 52 bool tee_device_get(struct tee_device *teedev); 53 void tee_device_put(struct tee_device *teedev); 54 55 void teedev_ctx_get(struct tee_context *ctx); 56 void teedev_ctx_put(struct tee_context *ctx); 57 58 struct tee_shm *tee_shm_alloc_user_buf(struct tee_context *ctx, size_t size); 59 struct tee_shm *tee_shm_register_user_buf(struct tee_context *ctx, 60 unsigned long addr, size_t length); 61 62 #endif /*TEE_PRIVATE_H*/ 63