forked from luck/tmp_suning_uos_patched
217e0250cc
We need to ensure that tee_context is present until last shared buffer will be freed. Signed-off-by: Volodymyr Babchuk <vlad.babchuk@gmail.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
80 lines
2.2 KiB
C
80 lines
2.2 KiB
C
/*
|
|
* 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);
|
|
|
|
void teedev_ctx_get(struct tee_context *ctx);
|
|
void teedev_ctx_put(struct tee_context *ctx);
|
|
|
|
#endif /*TEE_PRIVATE_H*/
|