/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (c) 2015-2016, Linaro Limited */ #ifndef TEE_PRIVATE_H #define TEE_PRIVATE_H #include <linux/cdev.h> #include <linux/completion.h> #include <linux/device.h> #include <linux/kref.h> #include <linux/mutex.h> #include <linux/types.h> /** * struct tee_shm_pool - shared memory pool * @private_mgr: pool manager for shared memory only between kernel * and secure world * @dma_buf_mgr: pool manager for shared memory exported to user space */ struct tee_shm_pool { struct tee_shm_pool_mgr *private_mgr; struct tee_shm_pool_mgr *dma_buf_mgr; }; #define TEE_DEVICE_FLAG_REGISTERED 0x1 #define TEE_MAX_DEV_NAME_LEN 32 /** * struct tee_device - TEE Device representation * @name: name of device * @desc: description of device * @id: unique id of device * @flags: represented by TEE_DEVICE_FLAG_REGISTERED above * @dev: embedded basic device structure * @cdev: embedded cdev * @num_users: number of active users of this device * @c_no_user: completion used when unregistering the device * @mutex: mutex protecting @num_users and @idr * @idr: register of user space shared memory objects allocated or * registered on this device * @pool: shared memory pool */ struct tee_device { char name[TEE_MAX_DEV_NAME_LEN]; const struct tee_desc *desc; int id; unsigned int flags; struct device dev; struct cdev cdev; size_t num_users; struct completion c_no_users; struct mutex mutex; /* protects num_users and idr */ struct idr idr; struct tee_shm_pool *pool; }; int tee_shm_init(void); int tee_shm_get_fd(struct tee_shm *shm); bool tee_device_get(struct tee_device *teedev); void tee_device_put(struct tee_device *teedev); void teedev_ctx_get(struct tee_context *ctx); void teedev_ctx_put(struct tee_context *ctx); #endif /*TEE_PRIVATE_H*/