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3 * Copyright 2008-2009 VMware, Inc., Palo Alto, CA., USA
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28 * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
29 * $FreeBSD: head/sys/dev/drm2/drm_global.c 248060 2013-03-08 18:11:02Z dumbbell $
33 #include <drm/drm_global.h>
35 struct drm_global_item {
41 static struct drm_global_item glob[DRM_GLOBAL_NUM];
43 void drm_global_init(void)
47 for (i = 0; i < DRM_GLOBAL_NUM; ++i) {
48 struct drm_global_item *item = &glob[i];
49 lockinit(&item->mutex, "drmgi", 0, LK_CANRECURSE);
55 void drm_global_release(void)
58 for (i = 0; i < DRM_GLOBAL_NUM; ++i) {
59 struct drm_global_item *item = &glob[i];
60 KKASSERT(item->object == NULL);
61 KKASSERT(item->refcount == 0);
62 lockuninit(&item->mutex);
66 int drm_global_item_ref(struct drm_global_reference *ref)
69 struct drm_global_item *item = &glob[ref->global_type];
72 lockmgr(&item->mutex, LK_EXCLUSIVE);
73 if (item->refcount == 0) {
74 item->object = kmalloc(ref->size, M_DRM,
77 ref->object = item->object;
79 if (unlikely(ret != 0))
84 ref->object = item->object;
85 object = item->object;
86 lockmgr(&item->mutex, LK_RELEASE);
89 lockmgr(&item->mutex, LK_RELEASE);
94 void drm_global_item_unref(struct drm_global_reference *ref)
96 struct drm_global_item *item = &glob[ref->global_type];
98 lockmgr(&item->mutex, LK_EXCLUSIVE);
99 KKASSERT(item->refcount != 0);
100 KKASSERT(ref->object == item->object);
101 if (--item->refcount == 0) {
103 drm_free(item->object, M_DRM);
106 lockmgr(&item->mutex, LK_RELEASE);