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 "drmP.h"
  29 #include "drm.h"
  30 #include "i915_drm.h"
  31 #include "i915_drv.h"
  32
  33 #if WATCH_INACTIVE
  34 void
  35 i915_verify_inactive(struct drm_device *dev, char *file, int line)
  36 {
  37         drm_i915_private_t *dev_priv = dev->dev_private;
  38         struct drm_gem_object *obj;
  39         struct drm_i915_gem_object *obj_priv;
  40
  41         list_for_each_entry(obj_priv, &dev_priv->mm.inactive_list, list) {
  42                 obj = obj_priv->obj;
  43                 if (obj_priv->pin_count || obj_priv->active ||
  44                     (obj->write_domain & ~(I915_GEM_DOMAIN_CPU |
  45                                            I915_GEM_DOMAIN_GTT)))
  46                         DRM_ERROR("inactive %p (p %d a %d w %x)  %s:%d\n",
  47                                   obj,
  48                                   obj_priv->pin_count, obj_priv->active,
  49                                   obj->write_domain, file, line);
  50         }
  51 }
  52 #endif /* WATCH_INACTIVE */
  53
  54
  55 #if WATCH_BUF | WATCH_EXEC | WATCH_PWRITE
  56 static void
  57 i915_gem_dump_page(struct page *page, uint32_t start, uint32_t end,
  58                    uint32_t bias, uint32_t mark)
  59 {
  60         uint32_t *mem = kmap_atomic(page, KM_USER0);
  61         int i;
  62         for (i = start; i < end; i += 4)
  63                 DRM_INFO("%08x: %08x%s\n",
  64                           (int) (bias + i), mem[i / 4],
  65                           (bias + i == mark) ? " ********" : "");
  66         kunmap_atomic(mem, KM_USER0);
  67         /* give syslog time to catch up */
  68         msleep(1);
  69 }
  70
  71 void
  72 i915_gem_dump_object(struct drm_gem_object *obj, int len,
  73                      const char *where, uint32_t mark)
  74 {
  75         struct drm_i915_gem_object *obj_priv = obj->driver_private;
  76         int page;
  77
  78         DRM_INFO("%s: object at offset %08x\n", where, obj_priv->gtt_offset);
  79         for (page = 0; page < (len + PAGE_SIZE-1) / PAGE_SIZE; page++) {
  80                 int page_len, chunk, chunk_len;
  81
  82                 page_len = len - page * PAGE_SIZE;
  83                 if (page_len > PAGE_SIZE)
  84                         page_len = PAGE_SIZE;
  85
  86                 for (chunk = 0; chunk < page_len; chunk += 128) {
  87                         chunk_len = page_len - chunk;
  88                         if (chunk_len > 128)
  89                                 chunk_len = 128;
  90                         i915_gem_dump_page(obj_priv->pages[page],
  91                                            chunk, chunk + chunk_len,
  92                                            obj_priv->gtt_offset +
  93                                            page * PAGE_SIZE,
  94                                            mark);
  95                 }
  96         }
  97 }
  98 #endif
  99
 100 #if WATCH_LRU
 101 void
 102 i915_dump_lru(struct drm_device *dev, const char *where)
 103 {
 104         drm_i915_private_t              *dev_priv = dev->dev_private;
 105         struct drm_i915_gem_object      *obj_priv;
 106
 107         DRM_INFO("active list %s {\n", where);
 108         spin_lock(&dev_priv->mm.active_list_lock);
 109         list_for_each_entry(obj_priv, &dev_priv->mm.active_list,
 110                             list)
 111         {
 112                 DRM_INFO("    %p: %08x\n", obj_priv,
 113                          obj_priv->last_rendering_seqno);
 114         }
 115         spin_unlock(&dev_priv->mm.active_list_lock);
 116         DRM_INFO("}\n");
 117         DRM_INFO("flushing list %s {\n", where);
 118         list_for_each_entry(obj_priv, &dev_priv->mm.flushing_list,
 119                             list)
 120         {
 121                 DRM_INFO("    %p: %08x\n", obj_priv,
 122                          obj_priv->last_rendering_seqno);
 123         }
 124         DRM_INFO("}\n");
 125         DRM_INFO("inactive %s {\n", where);
 126         list_for_each_entry(obj_priv, &dev_priv->mm.inactive_list, list) {
 127                 DRM_INFO("    %p: %08x\n", obj_priv,
 128                          obj_priv->last_rendering_seqno);
 129         }
 130         DRM_INFO("}\n");
 131 }
 132 #endif
 133
 134
 135 #if WATCH_COHERENCY
 136 void
 137 i915_gem_object_check_coherency(struct drm_gem_object *obj, int handle)
 138 {
 139         struct drm_device *dev = obj->dev;
 140         struct drm_i915_gem_object *obj_priv = obj->driver_private;
 141         int page;
 142         uint32_t *gtt_mapping;
 143         uint32_t *backing_map = NULL;
 144         int bad_count = 0;
 145
 146         DRM_INFO("%s: checking coherency of object %p@0x%08x (%d, %zdkb):\n",
 147                  __func__, obj, obj_priv->gtt_offset, handle,
 148                  obj->size / 1024);
 149
 150         gtt_mapping = ioremap(dev->agp->base + obj_priv->gtt_offset,
 151                               obj->size);
 152         if (gtt_mapping == NULL) {
 153                 DRM_ERROR("failed to map GTT space\n");
 154                 return;
 155         }
 156
 157         for (page = 0; page < obj->size / PAGE_SIZE; page++) {
 158                 int i;
 159
 160                 backing_map = kmap_atomic(obj_priv->pages[page], KM_USER0);
 161
 162                 if (backing_map == NULL) {
 163                         DRM_ERROR("failed to map backing page\n");
 164                         goto out;
 165                 }
 166
 167                 for (i = 0; i < PAGE_SIZE / 4; i++) {
 168                         uint32_t cpuval = backing_map[i];
 169                         uint32_t gttval = readl(gtt_mapping +
 170                                                 page * 1024 + i);
 171
 172                         if (cpuval != gttval) {
 173                                 DRM_INFO("incoherent CPU vs GPU at 0x%08x: "
 174                                          "0x%08x vs 0x%08x\n",
 175                                          (int)(obj_priv->gtt_offset +
 176                                                page * PAGE_SIZE + i * 4),
 177                                          cpuval, gttval);
 178                                 if (bad_count++ >= 8) {
 179                                         DRM_INFO("...\n");
 180                                         goto out;
 181                                 }
 182                         }
 183                 }
 184                 kunmap_atomic(backing_map, KM_USER0);
 185                 backing_map = NULL;
 186         }
 187
 188  out:
 189         if (backing_map != NULL)
 190                 kunmap_atomic(backing_map, KM_USER0);
 191         iounmap(gtt_mapping);
 192
 193         /* give syslog time to catch up */
 194         msleep(1);
 195
 196         /* Directly flush the object, since we just loaded values with the CPU
 197          * from the backing pages and we don't want to disturb the cache
 198          * management that we're trying to observe.
 199          */
 200
 201         i915_gem_clflush_object(obj);
 202 }
 203 #endif