63 lines
2.0 KiB
C
63 lines
2.0 KiB
C
/*
|
|
* 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_idr. */
|
|
spinlock_t table_lock;
|
|
};
|
|
|
|
void mmfs_object_reference(struct mmfs_object *obj);
|
|
void mmfs_object_unreference(struct mmfs_object *obj);
|