1 /* 2 * Copyright (c) 2015-2016, Linaro Limited 3 * 4 * This software is licensed under the terms of the GNU General Public 5 * License version 2, as published by the Free Software Foundation, and 6 * may be copied, distributed, and modified under those terms. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 * 13 */ 14 #ifndef TEE_PRIVATE_H 15 #define TEE_PRIVATE_H 16 17 #include <linux/cdev.h> 18 #include <linux/completion.h> 19 #include <linux/device.h> 20 #include <linux/kref.h> 21 #include <linux/mutex.h> 22 #include <linux/types.h> 23 24 /** 25 * struct tee_shm_pool - shared memory pool 26 * @private_mgr: pool manager for shared memory only between kernel 27 * and secure world 28 * @dma_buf_mgr: pool manager for shared memory exported to user space 29 */ 30 struct tee_shm_pool { 31 struct tee_shm_pool_mgr *private_mgr; 32 struct tee_shm_pool_mgr *dma_buf_mgr; 33 }; 34 35 #define TEE_DEVICE_FLAG_REGISTERED 0x1 36 #define TEE_MAX_DEV_NAME_LEN 32 37 38 /** 39 * struct tee_device - TEE Device representation 40 * @name: name of device 41 * @desc: description of device 42 * @id: unique id of device 43 * @flags: represented by TEE_DEVICE_FLAG_REGISTERED above 44 * @dev: embedded basic device structure 45 * @cdev: embedded cdev 46 * @num_users: number of active users of this device 47 * @c_no_user: completion used when unregistering the device 48 * @mutex: mutex protecting @num_users and @idr 49 * @idr: register of shared memory object allocated on this device 50 * @pool: shared memory pool 51 */ 52 struct tee_device { 53 char name[TEE_MAX_DEV_NAME_LEN]; 54 const struct tee_desc *desc; 55 int id; 56 unsigned int flags; 57 58 struct device dev; 59 struct cdev cdev; 60 61 size_t num_users; 62 struct completion c_no_users; 63 struct mutex mutex; /* protects num_users and idr */ 64 65 struct idr idr; 66 struct tee_shm_pool *pool; 67 }; 68 69 int tee_shm_init(void); 70 71 int tee_shm_get_fd(struct tee_shm *shm); 72 73 bool tee_device_get(struct tee_device *teedev); 74 void tee_device_put(struct tee_device *teedev); 75 76 void teedev_ctx_get(struct tee_context *ctx); 77 void teedev_ctx_put(struct tee_context *ctx); 78 79 #endif /*TEE_PRIVATE_H*/ 80