diff options
Diffstat (limited to 'drivers/gpu/drm/drm_global.c')
-rw-r--r-- | drivers/gpu/drm/drm_global.c | 137 |
1 files changed, 0 insertions, 137 deletions
diff --git a/drivers/gpu/drm/drm_global.c b/drivers/gpu/drm/drm_global.c deleted file mode 100644 index 5799e2782dd1..000000000000 --- a/drivers/gpu/drm/drm_global.c +++ /dev/null | |||
@@ -1,137 +0,0 @@ | |||
1 | // SPDX-License-Identifier: GPL-2.0 OR MIT | ||
2 | /************************************************************************** | ||
3 | * | ||
4 | * Copyright 2008-2009 VMware, Inc., Palo Alto, CA., USA | ||
5 | * | ||
6 | * Permission is hereby granted, free of charge, to any person obtaining a | ||
7 | * copy of this software and associated documentation files (the | ||
8 | * "Software"), to deal in the Software without restriction, including | ||
9 | * without limitation the rights to use, copy, modify, merge, publish, | ||
10 | * distribute, sub license, and/or sell copies of the Software, and to | ||
11 | * permit persons to whom the Software is furnished to do so, subject to | ||
12 | * the following conditions: | ||
13 | * | ||
14 | * The above copyright notice and this permission notice (including the | ||
15 | * next paragraph) shall be included in all copies or substantial portions | ||
16 | * of the Software. | ||
17 | * | ||
18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
20 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL | ||
21 | * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, | ||
22 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR | ||
23 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE | ||
24 | * USE OR OTHER DEALINGS IN THE SOFTWARE. | ||
25 | * | ||
26 | **************************************************************************/ | ||
27 | /* | ||
28 | * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com> | ||
29 | */ | ||
30 | |||
31 | #include <linux/mutex.h> | ||
32 | #include <linux/slab.h> | ||
33 | #include <linux/module.h> | ||
34 | #include <drm/drm_global.h> | ||
35 | |||
36 | struct drm_global_item { | ||
37 | struct mutex mutex; | ||
38 | void *object; | ||
39 | int refcount; | ||
40 | }; | ||
41 | |||
42 | static struct drm_global_item glob[DRM_GLOBAL_NUM]; | ||
43 | |||
44 | void drm_global_init(void) | ||
45 | { | ||
46 | int i; | ||
47 | |||
48 | for (i = 0; i < DRM_GLOBAL_NUM; ++i) { | ||
49 | struct drm_global_item *item = &glob[i]; | ||
50 | mutex_init(&item->mutex); | ||
51 | item->object = NULL; | ||
52 | item->refcount = 0; | ||
53 | } | ||
54 | } | ||
55 | |||
56 | void drm_global_release(void) | ||
57 | { | ||
58 | int i; | ||
59 | for (i = 0; i < DRM_GLOBAL_NUM; ++i) { | ||
60 | struct drm_global_item *item = &glob[i]; | ||
61 | BUG_ON(item->object != NULL); | ||
62 | BUG_ON(item->refcount != 0); | ||
63 | } | ||
64 | } | ||
65 | |||
66 | /** | ||
67 | * drm_global_item_ref - Initialize and acquire reference to memory | ||
68 | * object | ||
69 | * @ref: Object for initialization | ||
70 | * | ||
71 | * This initializes a memory object, allocating memory and calling the | ||
72 | * .init() hook. Further calls will increase the reference count for | ||
73 | * that item. | ||
74 | * | ||
75 | * Returns: | ||
76 | * Zero on success, non-zero otherwise. | ||
77 | */ | ||
78 | int drm_global_item_ref(struct drm_global_reference *ref) | ||
79 | { | ||
80 | int ret = 0; | ||
81 | struct drm_global_item *item = &glob[ref->global_type]; | ||
82 | |||
83 | mutex_lock(&item->mutex); | ||
84 | if (item->refcount == 0) { | ||
85 | ref->object = kzalloc(ref->size, GFP_KERNEL); | ||
86 | if (unlikely(ref->object == NULL)) { | ||
87 | ret = -ENOMEM; | ||
88 | goto error_unlock; | ||
89 | } | ||
90 | ret = ref->init(ref); | ||
91 | if (unlikely(ret != 0)) | ||
92 | goto error_free; | ||
93 | |||
94 | item->object = ref->object; | ||
95 | } else { | ||
96 | ref->object = item->object; | ||
97 | } | ||
98 | |||
99 | ++item->refcount; | ||
100 | mutex_unlock(&item->mutex); | ||
101 | return 0; | ||
102 | |||
103 | error_free: | ||
104 | kfree(ref->object); | ||
105 | ref->object = NULL; | ||
106 | error_unlock: | ||
107 | mutex_unlock(&item->mutex); | ||
108 | return ret; | ||
109 | } | ||
110 | EXPORT_SYMBOL(drm_global_item_ref); | ||
111 | |||
112 | /** | ||
113 | * drm_global_item_unref - Drop reference to memory | ||
114 | * object | ||
115 | * @ref: Object being removed | ||
116 | * | ||
117 | * Drop a reference to the memory object and eventually call the | ||
118 | * release() hook. The allocated object should be dropped in the | ||
119 | * release() hook or before calling this function | ||
120 | * | ||
121 | */ | ||
122 | |||
123 | void drm_global_item_unref(struct drm_global_reference *ref) | ||
124 | { | ||
125 | struct drm_global_item *item = &glob[ref->global_type]; | ||
126 | |||
127 | mutex_lock(&item->mutex); | ||
128 | BUG_ON(item->refcount == 0); | ||
129 | BUG_ON(ref->object != item->object); | ||
130 | if (--item->refcount == 0) { | ||
131 | ref->release(ref); | ||
132 | item->object = NULL; | ||
133 | } | ||
134 | mutex_unlock(&item->mutex); | ||
135 | } | ||
136 | EXPORT_SYMBOL(drm_global_item_unref); | ||
137 | |||