1 /**
2  * \file drm_legacy_misc.c
3  * Misc legacy support functions.
4  *
5  * \author Rickard E. (Rik) Faith <faith@valinux.com>
6  * \author Gareth Hughes <gareth@valinux.com>
7  */
8 
9 /*
10  * Created: Tue Feb  2 08:37:54 1999 by faith@valinux.com
11  *
12  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
13  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
14  * All Rights Reserved.
15  *
16  * Permission is hereby granted, free of charge, to any person obtaining a
17  * copy of this software and associated documentation files (the "Software"),
18  * to deal in the Software without restriction, including without limitation
19  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
20  * and/or sell copies of the Software, and to permit persons to whom the
21  * Software is furnished to do so, subject to the following conditions:
22  *
23  * The above copyright notice and this permission notice (including the next
24  * paragraph) shall be included in all copies or substantial portions of the
25  * Software.
26  *
27  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
28  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
29  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
30  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
31  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
32  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
33  * OTHER DEALINGS IN THE SOFTWARE.
34  */
35 
36 #include <drm/drmP.h>
37 #include "drm_internal.h"
38 #include "drm_legacy.h"
39 
40 void drm_legacy_init_members(struct drm_device *dev)
41 {
42 	INIT_LIST_HEAD(&dev->ctxlist);
43 	INIT_LIST_HEAD(&dev->vmalist);
44 	INIT_LIST_HEAD(&dev->maplist);
45 	spin_lock_init(&dev->buf_lock);
46 	mutex_init(&dev->ctxlist_mutex);
47 }
48 
49 void drm_legacy_destroy_members(struct drm_device *dev)
50 {
51 	mutex_destroy(&dev->ctxlist_mutex);
52 }
53 
54 void drm_legacy_dev_reinit(struct drm_device *dev)
55 {
56 	if (dev->irq_enabled)
57 		drm_irq_uninstall(dev);
58 
59 	mutex_lock(&dev->struct_mutex);
60 
61 	drm_legacy_agp_clear(dev);
62 
63 	drm_legacy_sg_cleanup(dev);
64 	drm_legacy_vma_flush(dev);
65 	drm_legacy_dma_takedown(dev);
66 
67 	mutex_unlock(&dev->struct_mutex);
68 
69 	dev->sigdata.lock = NULL;
70 
71 	dev->context_flag = 0;
72 	dev->last_context = 0;
73 	dev->if_version = 0;
74 
75 	DRM_DEBUG("lastclose completed\n");
76 }
77 
78 void drm_master_legacy_init(struct drm_master *master)
79 {
80 	spin_lock_init(&master->lock.spinlock);
81 	init_waitqueue_head(&master->lock.lock_queue);
82 }
83