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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 MALLOC_DEFINE(M_DRM_GLOBAL, "drm_global", "DRM Global Items");
37 struct drm_global_item {
43 static struct drm_global_item glob[DRM_GLOBAL_NUM];
45 void drm_global_init(void)
49 for (i = 0; i < DRM_GLOBAL_NUM; ++i) {
50 struct drm_global_item *item = &glob[i];
51 lockinit(&item->mutex, "drmgi", 0, LK_CANRECURSE);
57 void drm_global_release(void)
60 for (i = 0; i < DRM_GLOBAL_NUM; ++i) {
61 struct drm_global_item *item = &glob[i];
62 KKASSERT(item->object == NULL);
63 KKASSERT(item->refcount == 0);
64 lockuninit(&item->mutex);
68 int drm_global_item_ref(struct drm_global_reference *ref)
71 struct drm_global_item *item = &glob[ref->global_type];
74 lockmgr(&item->mutex, LK_EXCLUSIVE);
75 if (item->refcount == 0) {
76 item->object = kmalloc(ref->size, M_DRM_GLOBAL,
79 ref->object = item->object;
81 if (unlikely(ret != 0))
86 ref->object = item->object;
87 object = item->object;
88 lockmgr(&item->mutex, LK_RELEASE);
91 lockmgr(&item->mutex, LK_RELEASE);
96 void drm_global_item_unref(struct drm_global_reference *ref)
98 struct drm_global_item *item = &glob[ref->global_type];
100 lockmgr(&item->mutex, LK_EXCLUSIVE);
101 KKASSERT(item->refcount != 0);
102 KKASSERT(ref->object == item->object);
103 if (--item->refcount == 0) {
105 drm_free(item->object, M_DRM_GLOBAL);
108 lockmgr(&item->mutex, LK_RELEASE);