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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/types.h>
#include <linux/device.h>
#include <linux/cdev.h>
#include <linux/completion.h>
#include <linux/mutex.h>
#include <linux/kref.h>
struct tee_device;
struct tee_shm {
struct tee_device *teedev;
phys_addr_t paddr;
void *kaddr;
size_t size;
struct dma_buf *dmabuf;
u32 flags;
int id;
};
struct tee_shm_pool_mgr;
struct tee_shm_pool_mgr_ops {
int (*alloc)(struct tee_shm_pool_mgr *poolmgr, struct tee_shm *shm,
size_t size);
void (*free)(struct tee_shm_pool_mgr *poolmgr, struct tee_shm *shm);
};
struct tee_shm_pool_mgr {
const struct tee_shm_pool_mgr_ops *ops;
void *private_data;
};
struct tee_shm_pool {
struct tee_shm_pool_mgr private_mgr;
struct tee_shm_pool_mgr dma_buf_mgr;
void (*destroy)(struct tee_shm_pool *pool);
void *private_data;
};
#define TEE_DEVICE_FLAG_REGISTERED 0x1
#define TEE_MAX_DEV_NAME_LEN 32
struct tee_device {
char name[TEE_MAX_DEV_NAME_LEN];
const struct tee_desc *desc;
int id;
unsigned flags;
struct device dev;
struct cdev cdev;
size_t num_users;
struct completion c_no_users;
struct mutex mutex;
struct idr idr;
struct tee_shm_pool *pool;
};
int tee_shm_init(void);
/**
* tee_shm_get_fd() - Increase reference count and return file descriptor
* @shm: Shared memory handle
* @returns user space file descriptor to shared memory
*/
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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