1 /*
2 * Copyright © 2008 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 *
23 * Authors:
24 * Keith Packard <keithp@keithp.com>
25 *
26 */
27
28 #include <drm/drmP.h>
29 #include <drm/i915_drm.h>
30 #include "i915_drv.h"
31
32 #if WATCH_LISTS
33 int
i915_verify_lists(struct drm_device * dev)34 i915_verify_lists(struct drm_device *dev)
35 {
36 static int warned;
37 struct drm_i915_private *dev_priv = to_i915(dev);
38 struct drm_i915_gem_object *obj;
39 struct intel_engine_cs *ring;
40 int err = 0;
41 int i;
42
43 if (warned)
44 return 0;
45
46 for_each_ring(ring, dev_priv, i) {
47 list_for_each_entry(obj, &ring->active_list, ring_list[ring->id]) {
48 if (obj->base.dev != dev ||
49 !atomic_read(&obj->base.refcount.refcount)) {
50 DRM_ERROR("%s: freed active obj %p\n",
51 ring->name, obj);
52 err++;
53 break;
54 } else if (!obj->active ||
55 obj->last_read_req[ring->id] == NULL) {
56 DRM_ERROR("%s: invalid active obj %p\n",
57 ring->name, obj);
58 err++;
59 } else if (obj->base.write_domain) {
60 DRM_ERROR("%s: invalid write obj %p (w %x)\n",
61 ring->name,
62 obj, obj->base.write_domain);
63 err++;
64 }
65 }
66 }
67
68 return warned = err;
69 }
70 #endif /* WATCH_LIST */
71