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/*
* Copyright © 2008 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
* Authors:
* Eric Anholt <eric@anholt.net>
*
*/
#include <linux/spinlock.h>
#include <linux/idr.h>
/** @file mmfs_drv.h
* This file provides structure definitions and function prototypes for mmfs.
*/
/**
* This structure defines the mmfs memory object, which will be used by the
* DRM for its buffer objects.
*/
struct mmfs_object {
/** File representing the shmem storage */
struct file *filp;
spinlock_t lock;
size_t size;
/** Reference count of this object, protected by object_lock */
int refcount;
};
/**
* This structure defines the process (actually per-fd) mapping of object
* handles to mmfs objects.
*/
struct mmfs_file {
/** Mapping of object handles to object pointers. */
struct idr object_idr;
/**
* Lock for synchronization of access to object->refcount and
* object_idr. See note in mmfs_unreference_ioctl.
*/
spinlock_t delete_lock;
};
void mmfs_object_reference(struct mmfs_object *obj);
void mmfs_object_unreference(struct mmfs_object *obj);
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