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/*
* Copyright (c) 2015-2016, Linaro Limited
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#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 shared memory object allocated 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);
#endif /*TEE_PRIVATE_H*/
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