tee_private.h (1702B)
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 */ 33struct 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 50int tee_shm_init(void); 51 52int tee_shm_get_fd(struct tee_shm *shm); 53 54bool tee_device_get(struct tee_device *teedev); 55void tee_device_put(struct tee_device *teedev); 56 57void teedev_ctx_get(struct tee_context *ctx); 58void teedev_ctx_put(struct tee_context *ctx); 59 60struct tee_shm *tee_shm_alloc_user_buf(struct tee_context *ctx, size_t size); 61struct tee_shm *tee_shm_register_user_buf(struct tee_context *ctx, 62 unsigned long addr, size_t length); 63 64#endif /*TEE_PRIVATE_H*/