drm: Add GEM ("graphics execution manager") to i915 driver.
[linux-3.10.git] / 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->page_list[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         list_for_each_entry(obj_priv, &dev_priv->mm.active_list,
109                             list)
110         {
111                 DRM_INFO("    %p: %08x\n", obj_priv,
112                          obj_priv->last_rendering_seqno);
113         }
114         DRM_INFO("}\n");
115         DRM_INFO("flushing list %s {\n", where);
116         list_for_each_entry(obj_priv, &dev_priv->mm.flushing_list,
117                             list)
118         {
119                 DRM_INFO("    %p: %08x\n", obj_priv,
120                          obj_priv->last_rendering_seqno);
121         }
122         DRM_INFO("}\n");
123         DRM_INFO("inactive %s {\n", where);
124         list_for_each_entry(obj_priv, &dev_priv->mm.inactive_list, list) {
125                 DRM_INFO("    %p: %08x\n", obj_priv,
126                          obj_priv->last_rendering_seqno);
127         }
128         DRM_INFO("}\n");
129 }
130 #endif
131
132
133 #if WATCH_COHERENCY
134 void
135 i915_gem_object_check_coherency(struct drm_gem_object *obj, int handle)
136 {
137         struct drm_device *dev = obj->dev;
138         struct drm_i915_gem_object *obj_priv = obj->driver_private;
139         int page;
140         uint32_t *gtt_mapping;
141         uint32_t *backing_map = NULL;
142         int bad_count = 0;
143
144         DRM_INFO("%s: checking coherency of object %p@0x%08x (%d, %dkb):\n",
145                  __func__, obj, obj_priv->gtt_offset, handle,
146                  obj->size / 1024);
147
148         gtt_mapping = ioremap(dev->agp->base + obj_priv->gtt_offset,
149                               obj->size);
150         if (gtt_mapping == NULL) {
151                 DRM_ERROR("failed to map GTT space\n");
152                 return;
153         }
154
155         for (page = 0; page < obj->size / PAGE_SIZE; page++) {
156                 int i;
157
158                 backing_map = kmap_atomic(obj_priv->page_list[page], KM_USER0);
159
160                 if (backing_map == NULL) {
161                         DRM_ERROR("failed to map backing page\n");
162                         goto out;
163                 }
164
165                 for (i = 0; i < PAGE_SIZE / 4; i++) {
166                         uint32_t cpuval = backing_map[i];
167                         uint32_t gttval = readl(gtt_mapping +
168                                                 page * 1024 + i);
169
170                         if (cpuval != gttval) {
171                                 DRM_INFO("incoherent CPU vs GPU at 0x%08x: "
172                                          "0x%08x vs 0x%08x\n",
173                                          (int)(obj_priv->gtt_offset +
174                                                page * PAGE_SIZE + i * 4),
175                                          cpuval, gttval);
176                                 if (bad_count++ >= 8) {
177                                         DRM_INFO("...\n");
178                                         goto out;
179                                 }
180                         }
181                 }
182                 kunmap_atomic(backing_map, KM_USER0);
183                 backing_map = NULL;
184         }
185
186  out:
187         if (backing_map != NULL)
188                 kunmap_atomic(backing_map, KM_USER0);
189         iounmap(gtt_mapping);
190
191         /* give syslog time to catch up */
192         msleep(1);
193
194         /* Directly flush the object, since we just loaded values with the CPU
195          * from the backing pages and we don't want to disturb the cache
196          * management that we're trying to observe.
197          */
198
199         i915_gem_clflush_object(obj);
200 }
201 #endif