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be6a0376 DV |
1 | /* |
2 | * Copyright © 2008-2015 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 <linux/oom.h> | |
26 | #include <linux/shmem_fs.h> | |
27 | #include <linux/slab.h> | |
28 | #include <linux/swap.h> | |
29 | #include <linux/pci.h> | |
30 | #include <linux/dma-buf.h> | |
e87666b5 | 31 | #include <linux/vmalloc.h> |
be6a0376 DV |
32 | #include <drm/drmP.h> |
33 | #include <drm/i915_drm.h> | |
34 | ||
35 | #include "i915_drv.h" | |
36 | #include "i915_trace.h" | |
37 | ||
e92075ff | 38 | static bool shrinker_lock(struct drm_i915_private *dev_priv, bool *unlock) |
be6a0376 | 39 | { |
e92075ff | 40 | switch (mutex_trylock_recursive(&dev_priv->drm.struct_mutex)) { |
9439b371 | 41 | case MUTEX_TRYLOCK_RECURSIVE: |
1233e2db | 42 | *unlock = false; |
9439b371 | 43 | return true; |
290271de CW |
44 | |
45 | case MUTEX_TRYLOCK_FAILED: | |
cd82f37a CW |
46 | *unlock = false; |
47 | preempt_disable(); | |
290271de CW |
48 | do { |
49 | cpu_relax(); | |
50 | if (mutex_trylock(&dev_priv->drm.struct_mutex)) { | |
290271de | 51 | *unlock = true; |
cd82f37a | 52 | break; |
290271de CW |
53 | } |
54 | } while (!need_resched()); | |
cd82f37a CW |
55 | preempt_enable(); |
56 | return *unlock; | |
290271de | 57 | |
cd82f37a CW |
58 | case MUTEX_TRYLOCK_SUCCESS: |
59 | *unlock = true; | |
60 | return true; | |
1233e2db CW |
61 | } |
62 | ||
9439b371 | 63 | BUG(); |
1233e2db CW |
64 | } |
65 | ||
e92075ff | 66 | static void shrinker_unlock(struct drm_i915_private *dev_priv, bool unlock) |
8f612d05 JL |
67 | { |
68 | if (!unlock) | |
69 | return; | |
70 | ||
e92075ff | 71 | mutex_unlock(&dev_priv->drm.struct_mutex); |
8f612d05 JL |
72 | } |
73 | ||
15717de2 | 74 | static bool any_vma_pinned(struct drm_i915_gem_object *obj) |
c1a415e2 CW |
75 | { |
76 | struct i915_vma *vma; | |
c1a415e2 | 77 | |
b2241f18 CW |
78 | list_for_each_entry(vma, &obj->vma_list, obj_link) { |
79 | /* Only GGTT vma may be permanently pinned, and are always | |
80 | * at the start of the list. We can stop hunting as soon | |
81 | * as we see a ppGTT vma. | |
82 | */ | |
83 | if (!i915_vma_is_ggtt(vma)) | |
84 | break; | |
85 | ||
3272db53 | 86 | if (i915_vma_is_pinned(vma)) |
15717de2 | 87 | return true; |
b2241f18 | 88 | } |
c1a415e2 | 89 | |
15717de2 | 90 | return false; |
c1a415e2 CW |
91 | } |
92 | ||
93 | static bool swap_available(void) | |
94 | { | |
95 | return get_nr_swap_pages() > 0; | |
96 | } | |
97 | ||
98 | static bool can_release_pages(struct drm_i915_gem_object *obj) | |
99 | { | |
1233e2db CW |
100 | if (!obj->mm.pages) |
101 | return false; | |
102 | ||
3599a91c TU |
103 | /* Consider only shrinkable ojects. */ |
104 | if (!i915_gem_object_is_shrinkable(obj)) | |
1bec9b0b CW |
105 | return false; |
106 | ||
c1a415e2 CW |
107 | /* Only report true if by unbinding the object and putting its pages |
108 | * we can actually make forward progress towards freeing physical | |
109 | * pages. | |
110 | * | |
111 | * If the pages are pinned for any other reason than being bound | |
112 | * to the GPU, simply unbinding from the GPU is not going to succeed | |
113 | * in releasing our pin count on the pages themselves. | |
114 | */ | |
1233e2db | 115 | if (atomic_read(&obj->mm.pages_pin_count) > obj->bind_count) |
15717de2 CW |
116 | return false; |
117 | ||
118 | if (any_vma_pinned(obj)) | |
c1a415e2 CW |
119 | return false; |
120 | ||
121 | /* We can only return physical pages to the system if we can either | |
122 | * discard the contents (because the user has marked them as being | |
123 | * purgeable) or if we can move their contents out to swap. | |
124 | */ | |
a4f5ea64 | 125 | return swap_available() || obj->mm.madv == I915_MADV_DONTNEED; |
c1a415e2 CW |
126 | } |
127 | ||
03ac84f1 CW |
128 | static bool unsafe_drop_pages(struct drm_i915_gem_object *obj) |
129 | { | |
130 | if (i915_gem_object_unbind(obj) == 0) | |
548625ee | 131 | __i915_gem_object_put_pages(obj, I915_MM_SHRINKER); |
1233e2db | 132 | return !READ_ONCE(obj->mm.pages); |
c1a415e2 CW |
133 | } |
134 | ||
eb0b44ad DV |
135 | /** |
136 | * i915_gem_shrink - Shrink buffer object caches | |
137 | * @dev_priv: i915 device | |
138 | * @target: amount of memory to make available, in pages | |
139 | * @flags: control flags for selecting cache types | |
140 | * | |
141 | * This function is the main interface to the shrinker. It will try to release | |
142 | * up to @target pages of main memory backing storage from buffer objects. | |
143 | * Selection of the specific caches can be done with @flags. This is e.g. useful | |
144 | * when purgeable objects should be removed from caches preferentially. | |
145 | * | |
146 | * Note that it's not guaranteed that released amount is actually available as | |
147 | * free system memory - the pages might still be in-used to due to other reasons | |
148 | * (like cpu mmaps) or the mm core has reused them before we could grab them. | |
149 | * Therefore code that needs to explicitly shrink buffer objects caches (e.g. to | |
150 | * avoid deadlocks in memory reclaim) must fall back to i915_gem_shrink_all(). | |
151 | * | |
152 | * Also note that any kind of pinning (both per-vma address space pins and | |
153 | * backing storage pins at the buffer object level) result in the shrinker code | |
154 | * having to skip the object. | |
155 | * | |
156 | * Returns: | |
157 | * The number of pages of backing storage actually released. | |
158 | */ | |
be6a0376 DV |
159 | unsigned long |
160 | i915_gem_shrink(struct drm_i915_private *dev_priv, | |
14387540 | 161 | unsigned long target, unsigned flags) |
be6a0376 DV |
162 | { |
163 | const struct { | |
164 | struct list_head *list; | |
165 | unsigned int bit; | |
166 | } phases[] = { | |
167 | { &dev_priv->mm.unbound_list, I915_SHRINK_UNBOUND }, | |
168 | { &dev_priv->mm.bound_list, I915_SHRINK_BOUND }, | |
169 | { NULL, 0 }, | |
170 | }, *phase; | |
171 | unsigned long count = 0; | |
1233e2db CW |
172 | bool unlock; |
173 | ||
e92075ff | 174 | if (!shrinker_lock(dev_priv, &unlock)) |
1233e2db | 175 | return 0; |
be6a0376 | 176 | |
3abafa53 | 177 | trace_i915_gem_shrink(dev_priv, target, flags); |
c033666a | 178 | i915_gem_retire_requests(dev_priv); |
3abafa53 | 179 | |
178a30c9 PP |
180 | /* |
181 | * Unbinding of objects will require HW access; Let us not wake the | |
182 | * device just to recover a little memory. If absolutely necessary, | |
183 | * we will force the wake during oom-notifier. | |
184 | */ | |
185 | if ((flags & I915_SHRINK_BOUND) && | |
186 | !intel_runtime_pm_get_if_in_use(dev_priv)) | |
187 | flags &= ~I915_SHRINK_BOUND; | |
188 | ||
be6a0376 DV |
189 | /* |
190 | * As we may completely rewrite the (un)bound list whilst unbinding | |
191 | * (due to retiring requests) we have to strictly process only | |
192 | * one element of the list at the time, and recheck the list | |
193 | * on every iteration. | |
194 | * | |
195 | * In particular, we must hold a reference whilst removing the | |
196 | * object as we may end up waiting for and/or retiring the objects. | |
197 | * This might release the final reference (held by the active list) | |
198 | * and result in the object being freed from under us. This is | |
199 | * similar to the precautions the eviction code must take whilst | |
200 | * removing objects. | |
201 | * | |
202 | * Also note that although these lists do not hold a reference to | |
203 | * the object we can safely grab one here: The final object | |
204 | * unreferencing and the bound_list are both protected by the | |
205 | * dev->struct_mutex and so we won't ever be able to observe an | |
206 | * object on the bound_list with a reference count equals 0. | |
207 | */ | |
208 | for (phase = phases; phase->list; phase++) { | |
209 | struct list_head still_in_list; | |
2a1d7752 | 210 | struct drm_i915_gem_object *obj; |
be6a0376 DV |
211 | |
212 | if ((flags & phase->bit) == 0) | |
213 | continue; | |
214 | ||
215 | INIT_LIST_HEAD(&still_in_list); | |
2a1d7752 CW |
216 | while (count < target && |
217 | (obj = list_first_entry_or_null(phase->list, | |
218 | typeof(*obj), | |
56cea323 JL |
219 | global_link))) { |
220 | list_move_tail(&obj->global_link, &still_in_list); | |
fbbd37b3 | 221 | if (!obj->mm.pages) { |
56cea323 | 222 | list_del_init(&obj->global_link); |
fbbd37b3 CW |
223 | continue; |
224 | } | |
be6a0376 DV |
225 | |
226 | if (flags & I915_SHRINK_PURGEABLE && | |
a4f5ea64 | 227 | obj->mm.madv != I915_MADV_DONTNEED) |
be6a0376 DV |
228 | continue; |
229 | ||
eae2c43b | 230 | if (flags & I915_SHRINK_VMAPS && |
a4f5ea64 | 231 | !is_vmalloc_addr(obj->mm.mapping)) |
eae2c43b CW |
232 | continue; |
233 | ||
45353ce5 CW |
234 | if (!(flags & I915_SHRINK_ACTIVE) && |
235 | (i915_gem_object_is_active(obj) || | |
dd689287 | 236 | i915_gem_object_is_framebuffer(obj))) |
5763ff04 CW |
237 | continue; |
238 | ||
c1a415e2 CW |
239 | if (!can_release_pages(obj)) |
240 | continue; | |
241 | ||
1233e2db | 242 | if (unsafe_drop_pages(obj)) { |
7b7a119e CW |
243 | /* May arrive from get_pages on another bo */ |
244 | mutex_lock_nested(&obj->mm.lock, | |
548625ee | 245 | I915_MM_SHRINKER); |
1233e2db CW |
246 | if (!obj->mm.pages) { |
247 | __i915_gem_object_invalidate(obj); | |
56cea323 | 248 | list_del_init(&obj->global_link); |
1233e2db CW |
249 | count += obj->base.size >> PAGE_SHIFT; |
250 | } | |
251 | mutex_unlock(&obj->mm.lock); | |
252 | } | |
be6a0376 | 253 | } |
53597277 | 254 | list_splice_tail(&still_in_list, phase->list); |
be6a0376 DV |
255 | } |
256 | ||
178a30c9 PP |
257 | if (flags & I915_SHRINK_BOUND) |
258 | intel_runtime_pm_put(dev_priv); | |
259 | ||
c033666a | 260 | i915_gem_retire_requests(dev_priv); |
1233e2db | 261 | |
e92075ff | 262 | shrinker_unlock(dev_priv, unlock); |
c9c0f5ea | 263 | |
be6a0376 DV |
264 | return count; |
265 | } | |
266 | ||
eb0b44ad | 267 | /** |
1f2449cd | 268 | * i915_gem_shrink_all - Shrink buffer object caches completely |
eb0b44ad DV |
269 | * @dev_priv: i915 device |
270 | * | |
271 | * This is a simple wraper around i915_gem_shrink() to aggressively shrink all | |
272 | * caches completely. It also first waits for and retires all outstanding | |
273 | * requests to also be able to release backing storage for active objects. | |
274 | * | |
275 | * This should only be used in code to intentionally quiescent the gpu or as a | |
276 | * last-ditch effort when memory seems to have run out. | |
277 | * | |
278 | * Returns: | |
279 | * The number of pages of backing storage actually released. | |
280 | */ | |
be6a0376 DV |
281 | unsigned long i915_gem_shrink_all(struct drm_i915_private *dev_priv) |
282 | { | |
0eafec6d CW |
283 | unsigned long freed; |
284 | ||
519d5249 | 285 | intel_runtime_pm_get(dev_priv); |
0eafec6d CW |
286 | freed = i915_gem_shrink(dev_priv, -1UL, |
287 | I915_SHRINK_BOUND | | |
288 | I915_SHRINK_UNBOUND | | |
289 | I915_SHRINK_ACTIVE); | |
519d5249 CW |
290 | intel_runtime_pm_put(dev_priv); |
291 | ||
0eafec6d | 292 | return freed; |
be6a0376 DV |
293 | } |
294 | ||
be6a0376 DV |
295 | static unsigned long |
296 | i915_gem_shrinker_count(struct shrinker *shrinker, struct shrink_control *sc) | |
297 | { | |
298 | struct drm_i915_private *dev_priv = | |
299 | container_of(shrinker, struct drm_i915_private, mm.shrinker); | |
be6a0376 DV |
300 | struct drm_i915_gem_object *obj; |
301 | unsigned long count; | |
302 | bool unlock; | |
303 | ||
e92075ff | 304 | if (!shrinker_lock(dev_priv, &unlock)) |
be6a0376 DV |
305 | return 0; |
306 | ||
bed50aea CW |
307 | i915_gem_retire_requests(dev_priv); |
308 | ||
be6a0376 | 309 | count = 0; |
56cea323 | 310 | list_for_each_entry(obj, &dev_priv->mm.unbound_list, global_link) |
6f0ac204 | 311 | if (can_release_pages(obj)) |
be6a0376 DV |
312 | count += obj->base.size >> PAGE_SHIFT; |
313 | ||
56cea323 | 314 | list_for_each_entry(obj, &dev_priv->mm.bound_list, global_link) { |
573adb39 | 315 | if (!i915_gem_object_is_active(obj) && can_release_pages(obj)) |
be6a0376 DV |
316 | count += obj->base.size >> PAGE_SHIFT; |
317 | } | |
318 | ||
e92075ff | 319 | shrinker_unlock(dev_priv, unlock); |
be6a0376 DV |
320 | |
321 | return count; | |
322 | } | |
323 | ||
324 | static unsigned long | |
325 | i915_gem_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc) | |
326 | { | |
327 | struct drm_i915_private *dev_priv = | |
328 | container_of(shrinker, struct drm_i915_private, mm.shrinker); | |
be6a0376 DV |
329 | unsigned long freed; |
330 | bool unlock; | |
331 | ||
e92075ff | 332 | if (!shrinker_lock(dev_priv, &unlock)) |
be6a0376 DV |
333 | return SHRINK_STOP; |
334 | ||
335 | freed = i915_gem_shrink(dev_priv, | |
336 | sc->nr_to_scan, | |
337 | I915_SHRINK_BOUND | | |
338 | I915_SHRINK_UNBOUND | | |
339 | I915_SHRINK_PURGEABLE); | |
340 | if (freed < sc->nr_to_scan) | |
341 | freed += i915_gem_shrink(dev_priv, | |
342 | sc->nr_to_scan - freed, | |
343 | I915_SHRINK_BOUND | | |
344 | I915_SHRINK_UNBOUND); | |
1d24ad45 CW |
345 | if (freed < sc->nr_to_scan && current_is_kswapd()) { |
346 | intel_runtime_pm_get(dev_priv); | |
347 | freed += i915_gem_shrink(dev_priv, | |
348 | sc->nr_to_scan - freed, | |
349 | I915_SHRINK_ACTIVE | | |
350 | I915_SHRINK_BOUND | | |
351 | I915_SHRINK_UNBOUND); | |
352 | intel_runtime_pm_put(dev_priv); | |
353 | } | |
8f612d05 | 354 | |
e92075ff | 355 | shrinker_unlock(dev_priv, unlock); |
be6a0376 DV |
356 | |
357 | return freed; | |
358 | } | |
359 | ||
168cf367 | 360 | static bool |
e92075ff JL |
361 | shrinker_lock_uninterruptible(struct drm_i915_private *dev_priv, bool *unlock, |
362 | int timeout_ms) | |
168cf367 | 363 | { |
5cba5be6 CW |
364 | unsigned long timeout = jiffies + msecs_to_jiffies_timeout(timeout_ms); |
365 | ||
366 | do { | |
ea746f36 | 367 | if (i915_gem_wait_for_idle(dev_priv, 0) == 0 && |
e92075ff | 368 | shrinker_lock(dev_priv, unlock)) |
5cba5be6 | 369 | break; |
168cf367 | 370 | |
168cf367 CW |
371 | schedule_timeout_killable(1); |
372 | if (fatal_signal_pending(current)) | |
373 | return false; | |
5cba5be6 CW |
374 | |
375 | if (time_after(jiffies, timeout)) { | |
168cf367 CW |
376 | pr_err("Unable to lock GPU to purge memory.\n"); |
377 | return false; | |
378 | } | |
5cba5be6 | 379 | } while (1); |
168cf367 | 380 | |
168cf367 CW |
381 | return true; |
382 | } | |
383 | ||
be6a0376 DV |
384 | static int |
385 | i915_gem_shrinker_oom(struct notifier_block *nb, unsigned long event, void *ptr) | |
386 | { | |
387 | struct drm_i915_private *dev_priv = | |
388 | container_of(nb, struct drm_i915_private, mm.oom_notifier); | |
be6a0376 | 389 | struct drm_i915_gem_object *obj; |
1768d455 | 390 | unsigned long unevictable, bound, unbound, freed_pages; |
e92075ff | 391 | bool unlock; |
be6a0376 | 392 | |
e92075ff | 393 | if (!shrinker_lock_uninterruptible(dev_priv, &unlock, 5000)) |
be6a0376 | 394 | return NOTIFY_DONE; |
be6a0376 DV |
395 | |
396 | freed_pages = i915_gem_shrink_all(dev_priv); | |
397 | ||
be6a0376 DV |
398 | /* Because we may be allocating inside our own driver, we cannot |
399 | * assert that there are no objects with pinned pages that are not | |
400 | * being pointed to by hardware. | |
401 | */ | |
1768d455 | 402 | unbound = bound = unevictable = 0; |
56cea323 | 403 | list_for_each_entry(obj, &dev_priv->mm.unbound_list, global_link) { |
fbbd37b3 CW |
404 | if (!obj->mm.pages) |
405 | continue; | |
406 | ||
1768d455 CW |
407 | if (!can_release_pages(obj)) |
408 | unevictable += obj->base.size >> PAGE_SHIFT; | |
be6a0376 | 409 | else |
1768d455 | 410 | unbound += obj->base.size >> PAGE_SHIFT; |
be6a0376 | 411 | } |
56cea323 | 412 | list_for_each_entry(obj, &dev_priv->mm.bound_list, global_link) { |
fbbd37b3 CW |
413 | if (!obj->mm.pages) |
414 | continue; | |
415 | ||
1768d455 CW |
416 | if (!can_release_pages(obj)) |
417 | unevictable += obj->base.size >> PAGE_SHIFT; | |
be6a0376 | 418 | else |
1768d455 | 419 | bound += obj->base.size >> PAGE_SHIFT; |
be6a0376 DV |
420 | } |
421 | ||
e92075ff | 422 | shrinker_unlock(dev_priv, unlock); |
be6a0376 DV |
423 | |
424 | if (freed_pages || unbound || bound) | |
1768d455 CW |
425 | pr_info("Purging GPU memory, %lu pages freed, " |
426 | "%lu pages still pinned.\n", | |
427 | freed_pages, unevictable); | |
be6a0376 | 428 | if (unbound || bound) |
1768d455 | 429 | pr_err("%lu and %lu pages still available in the " |
be6a0376 DV |
430 | "bound and unbound GPU page lists.\n", |
431 | bound, unbound); | |
432 | ||
433 | *(unsigned long *)ptr += freed_pages; | |
434 | return NOTIFY_DONE; | |
435 | } | |
436 | ||
e87666b5 CW |
437 | static int |
438 | i915_gem_shrinker_vmap(struct notifier_block *nb, unsigned long event, void *ptr) | |
439 | { | |
440 | struct drm_i915_private *dev_priv = | |
441 | container_of(nb, struct drm_i915_private, mm.vmap_notifier); | |
8ef8561f CW |
442 | struct i915_vma *vma, *next; |
443 | unsigned long freed_pages = 0; | |
e92075ff | 444 | bool unlock; |
8ef8561f | 445 | int ret; |
e87666b5 | 446 | |
e92075ff | 447 | if (!shrinker_lock_uninterruptible(dev_priv, &unlock, 5000)) |
e87666b5 | 448 | return NOTIFY_DONE; |
e87666b5 | 449 | |
8ef8561f | 450 | /* Force everything onto the inactive lists */ |
22dd3bb9 | 451 | ret = i915_gem_wait_for_idle(dev_priv, I915_WAIT_LOCKED); |
8ef8561f CW |
452 | if (ret) |
453 | goto out; | |
454 | ||
ea9d9768 | 455 | intel_runtime_pm_get(dev_priv); |
8ef8561f CW |
456 | freed_pages += i915_gem_shrink(dev_priv, -1UL, |
457 | I915_SHRINK_BOUND | | |
458 | I915_SHRINK_UNBOUND | | |
459 | I915_SHRINK_ACTIVE | | |
460 | I915_SHRINK_VMAPS); | |
ea9d9768 | 461 | intel_runtime_pm_put(dev_priv); |
8ef8561f CW |
462 | |
463 | /* We also want to clear any cached iomaps as they wrap vmap */ | |
464 | list_for_each_entry_safe(vma, next, | |
465 | &dev_priv->ggtt.base.inactive_list, vm_link) { | |
466 | unsigned long count = vma->node.size >> PAGE_SHIFT; | |
467 | if (vma->iomap && i915_vma_unbind(vma) == 0) | |
468 | freed_pages += count; | |
469 | } | |
e87666b5 | 470 | |
8ef8561f | 471 | out: |
e92075ff | 472 | shrinker_unlock(dev_priv, unlock); |
e87666b5 CW |
473 | |
474 | *(unsigned long *)ptr += freed_pages; | |
475 | return NOTIFY_DONE; | |
476 | } | |
477 | ||
eb0b44ad DV |
478 | /** |
479 | * i915_gem_shrinker_init - Initialize i915 shrinker | |
480 | * @dev_priv: i915 device | |
481 | * | |
482 | * This function registers and sets up the i915 shrinker and OOM handler. | |
483 | */ | |
be6a0376 DV |
484 | void i915_gem_shrinker_init(struct drm_i915_private *dev_priv) |
485 | { | |
486 | dev_priv->mm.shrinker.scan_objects = i915_gem_shrinker_scan; | |
487 | dev_priv->mm.shrinker.count_objects = i915_gem_shrinker_count; | |
488 | dev_priv->mm.shrinker.seeks = DEFAULT_SEEKS; | |
a8a40589 | 489 | WARN_ON(register_shrinker(&dev_priv->mm.shrinker)); |
be6a0376 DV |
490 | |
491 | dev_priv->mm.oom_notifier.notifier_call = i915_gem_shrinker_oom; | |
a8a40589 | 492 | WARN_ON(register_oom_notifier(&dev_priv->mm.oom_notifier)); |
e87666b5 CW |
493 | |
494 | dev_priv->mm.vmap_notifier.notifier_call = i915_gem_shrinker_vmap; | |
495 | WARN_ON(register_vmap_purge_notifier(&dev_priv->mm.vmap_notifier)); | |
a8a40589 ID |
496 | } |
497 | ||
498 | /** | |
499 | * i915_gem_shrinker_cleanup - Clean up i915 shrinker | |
500 | * @dev_priv: i915 device | |
501 | * | |
502 | * This function unregisters the i915 shrinker and OOM handler. | |
503 | */ | |
504 | void i915_gem_shrinker_cleanup(struct drm_i915_private *dev_priv) | |
505 | { | |
e87666b5 | 506 | WARN_ON(unregister_vmap_purge_notifier(&dev_priv->mm.vmap_notifier)); |
a8a40589 ID |
507 | WARN_ON(unregister_oom_notifier(&dev_priv->mm.oom_notifier)); |
508 | unregister_shrinker(&dev_priv->mm.shrinker); | |
be6a0376 | 509 | } |