1 /* 2 * Copyright © 2016 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 */ 24 25 #include "../i915_selftest.h" 26 27 #include "mock_gem_device.h" 28 29 static int populate_ggtt(struct drm_i915_private *i915) 30 { 31 struct drm_i915_gem_object *obj; 32 u64 size; 33 34 for (size = 0; 35 size + I915_GTT_PAGE_SIZE <= i915->ggtt.base.total; 36 size += I915_GTT_PAGE_SIZE) { 37 struct i915_vma *vma; 38 39 obj = i915_gem_object_create_internal(i915, I915_GTT_PAGE_SIZE); 40 if (IS_ERR(obj)) 41 return PTR_ERR(obj); 42 43 vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0, 0); 44 if (IS_ERR(vma)) 45 return PTR_ERR(vma); 46 } 47 48 if (!list_empty(&i915->mm.unbound_list)) { 49 size = 0; 50 list_for_each_entry(obj, &i915->mm.unbound_list, global_link) 51 size++; 52 53 pr_err("Found %lld objects unbound!\n", size); 54 return -EINVAL; 55 } 56 57 if (list_empty(&i915->ggtt.base.inactive_list)) { 58 pr_err("No objects on the GGTT inactive list!\n"); 59 return -EINVAL; 60 } 61 62 return 0; 63 } 64 65 static void unpin_ggtt(struct drm_i915_private *i915) 66 { 67 struct i915_vma *vma; 68 69 list_for_each_entry(vma, &i915->ggtt.base.inactive_list, vm_link) 70 i915_vma_unpin(vma); 71 } 72 73 static void cleanup_objects(struct drm_i915_private *i915) 74 { 75 struct drm_i915_gem_object *obj, *on; 76 77 list_for_each_entry_safe(obj, on, &i915->mm.unbound_list, global_link) 78 i915_gem_object_put(obj); 79 80 list_for_each_entry_safe(obj, on, &i915->mm.bound_list, global_link) 81 i915_gem_object_put(obj); 82 83 mutex_unlock(&i915->drm.struct_mutex); 84 85 i915_gem_drain_freed_objects(i915); 86 87 mutex_lock(&i915->drm.struct_mutex); 88 } 89 90 static int igt_evict_something(void *arg) 91 { 92 struct drm_i915_private *i915 = arg; 93 struct i915_ggtt *ggtt = &i915->ggtt; 94 int err; 95 96 /* Fill the GGTT with pinned objects and try to evict one. */ 97 98 err = populate_ggtt(i915); 99 if (err) 100 goto cleanup; 101 102 /* Everything is pinned, nothing should happen */ 103 err = i915_gem_evict_something(&ggtt->base, 104 I915_GTT_PAGE_SIZE, 0, 0, 105 0, U64_MAX, 106 0); 107 if (err != -ENOSPC) { 108 pr_err("i915_gem_evict_something failed on a full GGTT with err=%d\n", 109 err); 110 goto cleanup; 111 } 112 113 unpin_ggtt(i915); 114 115 /* Everything is unpinned, we should be able to evict something */ 116 err = i915_gem_evict_something(&ggtt->base, 117 I915_GTT_PAGE_SIZE, 0, 0, 118 0, U64_MAX, 119 0); 120 if (err) { 121 pr_err("i915_gem_evict_something failed on a full GGTT with err=%d\n", 122 err); 123 goto cleanup; 124 } 125 126 cleanup: 127 cleanup_objects(i915); 128 return err; 129 } 130 131 static int igt_overcommit(void *arg) 132 { 133 struct drm_i915_private *i915 = arg; 134 struct drm_i915_gem_object *obj; 135 struct i915_vma *vma; 136 int err; 137 138 /* Fill the GGTT with pinned objects and then try to pin one more. 139 * We expect it to fail. 140 */ 141 142 err = populate_ggtt(i915); 143 if (err) 144 goto cleanup; 145 146 obj = i915_gem_object_create_internal(i915, I915_GTT_PAGE_SIZE); 147 if (IS_ERR(obj)) { 148 err = PTR_ERR(obj); 149 goto cleanup; 150 } 151 152 list_move(&obj->global_link, &i915->mm.unbound_list); 153 154 vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0, 0); 155 if (!IS_ERR(vma) || PTR_ERR(vma) != -ENOSPC) { 156 pr_err("Failed to evict+insert, i915_gem_object_ggtt_pin returned err=%d\n", (int)PTR_ERR(vma)); 157 err = -EINVAL; 158 goto cleanup; 159 } 160 161 cleanup: 162 cleanup_objects(i915); 163 return err; 164 } 165 166 static int igt_evict_for_vma(void *arg) 167 { 168 struct drm_i915_private *i915 = arg; 169 struct i915_ggtt *ggtt = &i915->ggtt; 170 struct drm_mm_node target = { 171 .start = 0, 172 .size = 4096, 173 }; 174 int err; 175 176 /* Fill the GGTT with pinned objects and try to evict a range. */ 177 178 err = populate_ggtt(i915); 179 if (err) 180 goto cleanup; 181 182 /* Everything is pinned, nothing should happen */ 183 err = i915_gem_evict_for_node(&ggtt->base, &target, 0); 184 if (err != -ENOSPC) { 185 pr_err("i915_gem_evict_for_node on a full GGTT returned err=%d\n", 186 err); 187 goto cleanup; 188 } 189 190 unpin_ggtt(i915); 191 192 /* Everything is unpinned, we should be able to evict the node */ 193 err = i915_gem_evict_for_node(&ggtt->base, &target, 0); 194 if (err) { 195 pr_err("i915_gem_evict_for_node returned err=%d\n", 196 err); 197 goto cleanup; 198 } 199 200 cleanup: 201 cleanup_objects(i915); 202 return err; 203 } 204 205 static void mock_color_adjust(const struct drm_mm_node *node, 206 unsigned long color, 207 u64 *start, 208 u64 *end) 209 { 210 } 211 212 static int igt_evict_for_cache_color(void *arg) 213 { 214 struct drm_i915_private *i915 = arg; 215 struct i915_ggtt *ggtt = &i915->ggtt; 216 const unsigned long flags = PIN_OFFSET_FIXED; 217 struct drm_mm_node target = { 218 .start = I915_GTT_PAGE_SIZE * 2, 219 .size = I915_GTT_PAGE_SIZE, 220 .color = I915_CACHE_LLC, 221 }; 222 struct drm_i915_gem_object *obj; 223 struct i915_vma *vma; 224 int err; 225 226 /* Currently the use of color_adjust is limited to cache domains within 227 * the ggtt, and so the presence of mm.color_adjust is assumed to be 228 * i915_gtt_color_adjust throughout our driver, so using a mock color 229 * adjust will work just fine for our purposes. 230 */ 231 ggtt->base.mm.color_adjust = mock_color_adjust; 232 233 obj = i915_gem_object_create_internal(i915, I915_GTT_PAGE_SIZE); 234 if (IS_ERR(obj)) { 235 err = PTR_ERR(obj); 236 goto cleanup; 237 } 238 i915_gem_object_set_cache_level(obj, I915_CACHE_LLC); 239 240 vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0, 241 I915_GTT_PAGE_SIZE | flags); 242 if (IS_ERR(vma)) { 243 pr_err("[0]i915_gem_object_ggtt_pin failed\n"); 244 err = PTR_ERR(vma); 245 goto cleanup; 246 } 247 248 obj = i915_gem_object_create_internal(i915, I915_GTT_PAGE_SIZE); 249 if (IS_ERR(obj)) { 250 err = PTR_ERR(obj); 251 goto cleanup; 252 } 253 i915_gem_object_set_cache_level(obj, I915_CACHE_LLC); 254 255 /* Neighbouring; same colour - should fit */ 256 vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0, 257 (I915_GTT_PAGE_SIZE * 2) | flags); 258 if (IS_ERR(vma)) { 259 pr_err("[1]i915_gem_object_ggtt_pin failed\n"); 260 err = PTR_ERR(vma); 261 goto cleanup; 262 } 263 264 i915_vma_unpin(vma); 265 266 /* Remove just the second vma */ 267 err = i915_gem_evict_for_node(&ggtt->base, &target, 0); 268 if (err) { 269 pr_err("[0]i915_gem_evict_for_node returned err=%d\n", err); 270 goto cleanup; 271 } 272 273 /* Attempt to remove the first *pinned* vma, by removing the (empty) 274 * neighbour -- this should fail. 275 */ 276 target.color = I915_CACHE_L3_LLC; 277 278 err = i915_gem_evict_for_node(&ggtt->base, &target, 0); 279 if (!err) { 280 pr_err("[1]i915_gem_evict_for_node returned err=%d\n", err); 281 err = -EINVAL; 282 goto cleanup; 283 } 284 285 err = 0; 286 287 cleanup: 288 unpin_ggtt(i915); 289 cleanup_objects(i915); 290 ggtt->base.mm.color_adjust = NULL; 291 return err; 292 } 293 294 static int igt_evict_vm(void *arg) 295 { 296 struct drm_i915_private *i915 = arg; 297 struct i915_ggtt *ggtt = &i915->ggtt; 298 int err; 299 300 /* Fill the GGTT with pinned objects and try to evict everything. */ 301 302 err = populate_ggtt(i915); 303 if (err) 304 goto cleanup; 305 306 /* Everything is pinned, nothing should happen */ 307 err = i915_gem_evict_vm(&ggtt->base); 308 if (err) { 309 pr_err("i915_gem_evict_vm on a full GGTT returned err=%d]\n", 310 err); 311 goto cleanup; 312 } 313 314 unpin_ggtt(i915); 315 316 err = i915_gem_evict_vm(&ggtt->base); 317 if (err) { 318 pr_err("i915_gem_evict_vm on a full GGTT returned err=%d]\n", 319 err); 320 goto cleanup; 321 } 322 323 cleanup: 324 cleanup_objects(i915); 325 return err; 326 } 327 328 int i915_gem_evict_mock_selftests(void) 329 { 330 static const struct i915_subtest tests[] = { 331 SUBTEST(igt_evict_something), 332 SUBTEST(igt_evict_for_vma), 333 SUBTEST(igt_evict_for_cache_color), 334 SUBTEST(igt_evict_vm), 335 SUBTEST(igt_overcommit), 336 }; 337 struct drm_i915_private *i915; 338 int err; 339 340 i915 = mock_gem_device(); 341 if (!i915) 342 return -ENOMEM; 343 344 mutex_lock(&i915->drm.struct_mutex); 345 err = i915_subtests(tests, i915); 346 mutex_unlock(&i915->drm.struct_mutex); 347 348 drm_dev_unref(&i915->drm); 349 return err; 350 } 351