drivers/gpu/drm/i915/i915_gem_debug.c

   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
  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 */