1 /**************************************************************************
3 * Copyright 2008-2009 VMware, Inc., Palo Alto, CA., USA
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:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
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.
26 **************************************************************************/
28 * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
34 #include <dev/drm2/drmP.h>
35 #include <dev/drm2/drm_global.h>
37 MALLOC_DEFINE(M_DRM_GLOBAL, "drm_global", "DRM Global Items");
39 struct drm_global_item {
45 static struct drm_global_item glob[DRM_GLOBAL_NUM];
47 void drm_global_init(void)
51 for (i = 0; i < DRM_GLOBAL_NUM; ++i) {
52 struct drm_global_item *item = &glob[i];
53 sx_init(&item->mutex, "drmgi");
59 void drm_global_release(void)
62 for (i = 0; i < DRM_GLOBAL_NUM; ++i) {
63 struct drm_global_item *item = &glob[i];
64 MPASS(item->object == NULL);
65 MPASS(item->refcount == 0);
66 sx_destroy(&item->mutex);
70 int drm_global_item_ref(struct drm_global_reference *ref)
73 struct drm_global_item *item = &glob[ref->global_type];
76 sx_xlock(&item->mutex);
77 if (item->refcount == 0) {
78 item->object = malloc(ref->size, M_DRM_GLOBAL,
81 ref->object = item->object;
83 if (unlikely(ret != 0))
88 ref->object = item->object;
89 object = item->object;
90 sx_xunlock(&item->mutex);
93 sx_xunlock(&item->mutex);
98 void drm_global_item_unref(struct drm_global_reference *ref)
100 struct drm_global_item *item = &glob[ref->global_type];
102 sx_xlock(&item->mutex);
103 MPASS(item->refcount != 0);
104 MPASS(ref->object == item->object);
105 if (--item->refcount == 0) {
109 sx_xunlock(&item->mutex);