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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 | ||
c1a415e2 CW |
74 | static bool swap_available(void) |
75 | { | |
76 | return get_nr_swap_pages() > 0; | |
77 | } | |
78 | ||
79 | static bool can_release_pages(struct drm_i915_gem_object *obj) | |
80 | { | |
3599a91c TU |
81 | /* Consider only shrinkable ojects. */ |
82 | if (!i915_gem_object_is_shrinkable(obj)) | |
1bec9b0b CW |
83 | return false; |
84 | ||
c1a415e2 CW |
85 | /* Only report true if by unbinding the object and putting its pages |
86 | * we can actually make forward progress towards freeing physical | |
87 | * pages. | |
88 | * | |
89 | * If the pages are pinned for any other reason than being bound | |
90 | * to the GPU, simply unbinding from the GPU is not going to succeed | |
91 | * in releasing our pin count on the pages themselves. | |
92 | */ | |
1233e2db | 93 | if (atomic_read(&obj->mm.pages_pin_count) > obj->bind_count) |
15717de2 CW |
94 | return false; |
95 | ||
3d574a6b CW |
96 | /* If any vma are "permanently" pinned, it will prevent us from |
97 | * reclaiming the obj->mm.pages. We only allow scanout objects to claim | |
98 | * a permanent pin, along with a few others like the context objects. | |
99 | * To simplify the scan, and to avoid walking the list of vma under the | |
100 | * object, we just check the count of its permanently pinned. | |
101 | */ | |
f2123818 | 102 | if (READ_ONCE(obj->pin_global)) |
c1a415e2 CW |
103 | return false; |
104 | ||
105 | /* We can only return physical pages to the system if we can either | |
106 | * discard the contents (because the user has marked them as being | |
107 | * purgeable) or if we can move their contents out to swap. | |
108 | */ | |
a4f5ea64 | 109 | return swap_available() || obj->mm.madv == I915_MADV_DONTNEED; |
c1a415e2 CW |
110 | } |
111 | ||
03ac84f1 CW |
112 | static bool unsafe_drop_pages(struct drm_i915_gem_object *obj) |
113 | { | |
114 | if (i915_gem_object_unbind(obj) == 0) | |
548625ee | 115 | __i915_gem_object_put_pages(obj, I915_MM_SHRINKER); |
f1fa4f44 | 116 | return !i915_gem_object_has_pages(obj); |
c1a415e2 CW |
117 | } |
118 | ||
eb0b44ad DV |
119 | /** |
120 | * i915_gem_shrink - Shrink buffer object caches | |
121 | * @dev_priv: i915 device | |
122 | * @target: amount of memory to make available, in pages | |
912d572d | 123 | * @nr_scanned: optional output for number of pages scanned (incremental) |
eb0b44ad DV |
124 | * @flags: control flags for selecting cache types |
125 | * | |
126 | * This function is the main interface to the shrinker. It will try to release | |
127 | * up to @target pages of main memory backing storage from buffer objects. | |
128 | * Selection of the specific caches can be done with @flags. This is e.g. useful | |
129 | * when purgeable objects should be removed from caches preferentially. | |
130 | * | |
131 | * Note that it's not guaranteed that released amount is actually available as | |
132 | * free system memory - the pages might still be in-used to due to other reasons | |
133 | * (like cpu mmaps) or the mm core has reused them before we could grab them. | |
134 | * Therefore code that needs to explicitly shrink buffer objects caches (e.g. to | |
135 | * avoid deadlocks in memory reclaim) must fall back to i915_gem_shrink_all(). | |
136 | * | |
137 | * Also note that any kind of pinning (both per-vma address space pins and | |
138 | * backing storage pins at the buffer object level) result in the shrinker code | |
139 | * having to skip the object. | |
140 | * | |
141 | * Returns: | |
142 | * The number of pages of backing storage actually released. | |
143 | */ | |
be6a0376 DV |
144 | unsigned long |
145 | i915_gem_shrink(struct drm_i915_private *dev_priv, | |
912d572d CW |
146 | unsigned long target, |
147 | unsigned long *nr_scanned, | |
148 | unsigned flags) | |
be6a0376 DV |
149 | { |
150 | const struct { | |
151 | struct list_head *list; | |
152 | unsigned int bit; | |
153 | } phases[] = { | |
154 | { &dev_priv->mm.unbound_list, I915_SHRINK_UNBOUND }, | |
155 | { &dev_priv->mm.bound_list, I915_SHRINK_BOUND }, | |
156 | { NULL, 0 }, | |
157 | }, *phase; | |
158 | unsigned long count = 0; | |
912d572d | 159 | unsigned long scanned = 0; |
1233e2db CW |
160 | bool unlock; |
161 | ||
e92075ff | 162 | if (!shrinker_lock(dev_priv, &unlock)) |
1233e2db | 163 | return 0; |
be6a0376 | 164 | |
3abafa53 | 165 | trace_i915_gem_shrink(dev_priv, target, flags); |
c033666a | 166 | i915_gem_retire_requests(dev_priv); |
3abafa53 | 167 | |
178a30c9 PP |
168 | /* |
169 | * Unbinding of objects will require HW access; Let us not wake the | |
170 | * device just to recover a little memory. If absolutely necessary, | |
171 | * we will force the wake during oom-notifier. | |
172 | */ | |
173 | if ((flags & I915_SHRINK_BOUND) && | |
174 | !intel_runtime_pm_get_if_in_use(dev_priv)) | |
175 | flags &= ~I915_SHRINK_BOUND; | |
176 | ||
be6a0376 DV |
177 | /* |
178 | * As we may completely rewrite the (un)bound list whilst unbinding | |
179 | * (due to retiring requests) we have to strictly process only | |
180 | * one element of the list at the time, and recheck the list | |
181 | * on every iteration. | |
182 | * | |
183 | * In particular, we must hold a reference whilst removing the | |
184 | * object as we may end up waiting for and/or retiring the objects. | |
185 | * This might release the final reference (held by the active list) | |
186 | * and result in the object being freed from under us. This is | |
187 | * similar to the precautions the eviction code must take whilst | |
188 | * removing objects. | |
189 | * | |
190 | * Also note that although these lists do not hold a reference to | |
191 | * the object we can safely grab one here: The final object | |
192 | * unreferencing and the bound_list are both protected by the | |
193 | * dev->struct_mutex and so we won't ever be able to observe an | |
194 | * object on the bound_list with a reference count equals 0. | |
195 | */ | |
196 | for (phase = phases; phase->list; phase++) { | |
197 | struct list_head still_in_list; | |
2a1d7752 | 198 | struct drm_i915_gem_object *obj; |
be6a0376 DV |
199 | |
200 | if ((flags & phase->bit) == 0) | |
201 | continue; | |
202 | ||
203 | INIT_LIST_HEAD(&still_in_list); | |
f2123818 CW |
204 | |
205 | /* | |
206 | * We serialize our access to unreferenced objects through | |
207 | * the use of the struct_mutex. While the objects are not | |
208 | * yet freed (due to RCU then a workqueue) we still want | |
209 | * to be able to shrink their pages, so they remain on | |
210 | * the unbound/bound list until actually freed. | |
211 | */ | |
212 | spin_lock(&dev_priv->mm.obj_lock); | |
2a1d7752 CW |
213 | while (count < target && |
214 | (obj = list_first_entry_or_null(phase->list, | |
215 | typeof(*obj), | |
f2123818 CW |
216 | mm.link))) { |
217 | list_move_tail(&obj->mm.link, &still_in_list); | |
be6a0376 DV |
218 | |
219 | if (flags & I915_SHRINK_PURGEABLE && | |
a4f5ea64 | 220 | obj->mm.madv != I915_MADV_DONTNEED) |
be6a0376 DV |
221 | continue; |
222 | ||
eae2c43b | 223 | if (flags & I915_SHRINK_VMAPS && |
a4f5ea64 | 224 | !is_vmalloc_addr(obj->mm.mapping)) |
eae2c43b CW |
225 | continue; |
226 | ||
45353ce5 CW |
227 | if (!(flags & I915_SHRINK_ACTIVE) && |
228 | (i915_gem_object_is_active(obj) || | |
dd689287 | 229 | i915_gem_object_is_framebuffer(obj))) |
5763ff04 CW |
230 | continue; |
231 | ||
c1a415e2 CW |
232 | if (!can_release_pages(obj)) |
233 | continue; | |
234 | ||
f2123818 CW |
235 | spin_unlock(&dev_priv->mm.obj_lock); |
236 | ||
1233e2db | 237 | if (unsafe_drop_pages(obj)) { |
7b7a119e CW |
238 | /* May arrive from get_pages on another bo */ |
239 | mutex_lock_nested(&obj->mm.lock, | |
548625ee | 240 | I915_MM_SHRINKER); |
f1fa4f44 | 241 | if (!i915_gem_object_has_pages(obj)) { |
1233e2db CW |
242 | __i915_gem_object_invalidate(obj); |
243 | count += obj->base.size >> PAGE_SHIFT; | |
244 | } | |
245 | mutex_unlock(&obj->mm.lock); | |
912d572d | 246 | scanned += obj->base.size >> PAGE_SHIFT; |
1233e2db | 247 | } |
f2123818 CW |
248 | |
249 | spin_lock(&dev_priv->mm.obj_lock); | |
be6a0376 | 250 | } |
53597277 | 251 | list_splice_tail(&still_in_list, phase->list); |
f2123818 | 252 | spin_unlock(&dev_priv->mm.obj_lock); |
be6a0376 DV |
253 | } |
254 | ||
178a30c9 PP |
255 | if (flags & I915_SHRINK_BOUND) |
256 | intel_runtime_pm_put(dev_priv); | |
257 | ||
c033666a | 258 | i915_gem_retire_requests(dev_priv); |
1233e2db | 259 | |
e92075ff | 260 | shrinker_unlock(dev_priv, unlock); |
c9c0f5ea | 261 | |
912d572d CW |
262 | if (nr_scanned) |
263 | *nr_scanned += scanned; | |
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); |
912d572d | 286 | freed = i915_gem_shrink(dev_priv, -1UL, NULL, |
0eafec6d CW |
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 | 300 | struct drm_i915_gem_object *obj; |
f2123818 | 301 | unsigned long count = 0; |
bed50aea | 302 | |
f2123818 CW |
303 | spin_lock(&dev_priv->mm.obj_lock); |
304 | list_for_each_entry(obj, &dev_priv->mm.unbound_list, mm.link) | |
6f0ac204 | 305 | if (can_release_pages(obj)) |
be6a0376 DV |
306 | count += obj->base.size >> PAGE_SHIFT; |
307 | ||
f2123818 | 308 | list_for_each_entry(obj, &dev_priv->mm.bound_list, mm.link) |
573adb39 | 309 | if (!i915_gem_object_is_active(obj) && can_release_pages(obj)) |
be6a0376 | 310 | count += obj->base.size >> PAGE_SHIFT; |
f2123818 | 311 | spin_unlock(&dev_priv->mm.obj_lock); |
be6a0376 DV |
312 | |
313 | return count; | |
314 | } | |
315 | ||
316 | static unsigned long | |
317 | i915_gem_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc) | |
318 | { | |
319 | struct drm_i915_private *dev_priv = | |
320 | container_of(shrinker, struct drm_i915_private, mm.shrinker); | |
be6a0376 DV |
321 | unsigned long freed; |
322 | bool unlock; | |
323 | ||
912d572d CW |
324 | sc->nr_scanned = 0; |
325 | ||
e92075ff | 326 | if (!shrinker_lock(dev_priv, &unlock)) |
be6a0376 DV |
327 | return SHRINK_STOP; |
328 | ||
329 | freed = i915_gem_shrink(dev_priv, | |
330 | sc->nr_to_scan, | |
912d572d | 331 | &sc->nr_scanned, |
be6a0376 DV |
332 | I915_SHRINK_BOUND | |
333 | I915_SHRINK_UNBOUND | | |
334 | I915_SHRINK_PURGEABLE); | |
335 | if (freed < sc->nr_to_scan) | |
336 | freed += i915_gem_shrink(dev_priv, | |
912d572d CW |
337 | sc->nr_to_scan - sc->nr_scanned, |
338 | &sc->nr_scanned, | |
be6a0376 DV |
339 | I915_SHRINK_BOUND | |
340 | I915_SHRINK_UNBOUND); | |
1d24ad45 CW |
341 | if (freed < sc->nr_to_scan && current_is_kswapd()) { |
342 | intel_runtime_pm_get(dev_priv); | |
343 | freed += i915_gem_shrink(dev_priv, | |
912d572d CW |
344 | sc->nr_to_scan - sc->nr_scanned, |
345 | &sc->nr_scanned, | |
1d24ad45 CW |
346 | I915_SHRINK_ACTIVE | |
347 | I915_SHRINK_BOUND | | |
348 | I915_SHRINK_UNBOUND); | |
349 | intel_runtime_pm_put(dev_priv); | |
350 | } | |
8f612d05 | 351 | |
e92075ff | 352 | shrinker_unlock(dev_priv, unlock); |
be6a0376 | 353 | |
912d572d | 354 | return sc->nr_scanned ? freed : SHRINK_STOP; |
be6a0376 DV |
355 | } |
356 | ||
168cf367 | 357 | static bool |
e92075ff JL |
358 | shrinker_lock_uninterruptible(struct drm_i915_private *dev_priv, bool *unlock, |
359 | int timeout_ms) | |
168cf367 | 360 | { |
5cba5be6 CW |
361 | unsigned long timeout = jiffies + msecs_to_jiffies_timeout(timeout_ms); |
362 | ||
363 | do { | |
ea746f36 | 364 | if (i915_gem_wait_for_idle(dev_priv, 0) == 0 && |
e92075ff | 365 | shrinker_lock(dev_priv, unlock)) |
5cba5be6 | 366 | break; |
168cf367 | 367 | |
168cf367 CW |
368 | schedule_timeout_killable(1); |
369 | if (fatal_signal_pending(current)) | |
370 | return false; | |
5cba5be6 CW |
371 | |
372 | if (time_after(jiffies, timeout)) { | |
168cf367 CW |
373 | pr_err("Unable to lock GPU to purge memory.\n"); |
374 | return false; | |
375 | } | |
5cba5be6 | 376 | } while (1); |
168cf367 | 377 | |
168cf367 CW |
378 | return true; |
379 | } | |
380 | ||
be6a0376 DV |
381 | static int |
382 | i915_gem_shrinker_oom(struct notifier_block *nb, unsigned long event, void *ptr) | |
383 | { | |
384 | struct drm_i915_private *dev_priv = | |
385 | container_of(nb, struct drm_i915_private, mm.oom_notifier); | |
be6a0376 | 386 | struct drm_i915_gem_object *obj; |
1768d455 | 387 | unsigned long unevictable, bound, unbound, freed_pages; |
be6a0376 DV |
388 | |
389 | freed_pages = i915_gem_shrink_all(dev_priv); | |
390 | ||
be6a0376 DV |
391 | /* Because we may be allocating inside our own driver, we cannot |
392 | * assert that there are no objects with pinned pages that are not | |
393 | * being pointed to by hardware. | |
394 | */ | |
1768d455 | 395 | unbound = bound = unevictable = 0; |
f2123818 CW |
396 | spin_lock(&dev_priv->mm.obj_lock); |
397 | list_for_each_entry(obj, &dev_priv->mm.unbound_list, mm.link) { | |
1768d455 CW |
398 | if (!can_release_pages(obj)) |
399 | unevictable += obj->base.size >> PAGE_SHIFT; | |
be6a0376 | 400 | else |
1768d455 | 401 | unbound += obj->base.size >> PAGE_SHIFT; |
be6a0376 | 402 | } |
f2123818 | 403 | list_for_each_entry(obj, &dev_priv->mm.bound_list, mm.link) { |
1768d455 CW |
404 | if (!can_release_pages(obj)) |
405 | unevictable += obj->base.size >> PAGE_SHIFT; | |
be6a0376 | 406 | else |
1768d455 | 407 | bound += obj->base.size >> PAGE_SHIFT; |
be6a0376 | 408 | } |
f2123818 | 409 | spin_unlock(&dev_priv->mm.obj_lock); |
be6a0376 DV |
410 | |
411 | if (freed_pages || unbound || bound) | |
1768d455 CW |
412 | pr_info("Purging GPU memory, %lu pages freed, " |
413 | "%lu pages still pinned.\n", | |
414 | freed_pages, unevictable); | |
be6a0376 | 415 | if (unbound || bound) |
1768d455 | 416 | pr_err("%lu and %lu pages still available in the " |
be6a0376 DV |
417 | "bound and unbound GPU page lists.\n", |
418 | bound, unbound); | |
419 | ||
420 | *(unsigned long *)ptr += freed_pages; | |
421 | return NOTIFY_DONE; | |
422 | } | |
423 | ||
e87666b5 CW |
424 | static int |
425 | i915_gem_shrinker_vmap(struct notifier_block *nb, unsigned long event, void *ptr) | |
426 | { | |
427 | struct drm_i915_private *dev_priv = | |
428 | container_of(nb, struct drm_i915_private, mm.vmap_notifier); | |
8ef8561f CW |
429 | struct i915_vma *vma, *next; |
430 | unsigned long freed_pages = 0; | |
e92075ff | 431 | bool unlock; |
8ef8561f | 432 | int ret; |
e87666b5 | 433 | |
e92075ff | 434 | if (!shrinker_lock_uninterruptible(dev_priv, &unlock, 5000)) |
e87666b5 | 435 | return NOTIFY_DONE; |
e87666b5 | 436 | |
8ef8561f | 437 | /* Force everything onto the inactive lists */ |
22dd3bb9 | 438 | ret = i915_gem_wait_for_idle(dev_priv, I915_WAIT_LOCKED); |
8ef8561f CW |
439 | if (ret) |
440 | goto out; | |
441 | ||
ea9d9768 | 442 | intel_runtime_pm_get(dev_priv); |
912d572d | 443 | freed_pages += i915_gem_shrink(dev_priv, -1UL, NULL, |
8ef8561f CW |
444 | I915_SHRINK_BOUND | |
445 | I915_SHRINK_UNBOUND | | |
446 | I915_SHRINK_ACTIVE | | |
447 | I915_SHRINK_VMAPS); | |
ea9d9768 | 448 | intel_runtime_pm_put(dev_priv); |
8ef8561f CW |
449 | |
450 | /* We also want to clear any cached iomaps as they wrap vmap */ | |
451 | list_for_each_entry_safe(vma, next, | |
452 | &dev_priv->ggtt.base.inactive_list, vm_link) { | |
453 | unsigned long count = vma->node.size >> PAGE_SHIFT; | |
454 | if (vma->iomap && i915_vma_unbind(vma) == 0) | |
455 | freed_pages += count; | |
456 | } | |
e87666b5 | 457 | |
8ef8561f | 458 | out: |
e92075ff | 459 | shrinker_unlock(dev_priv, unlock); |
e87666b5 CW |
460 | |
461 | *(unsigned long *)ptr += freed_pages; | |
462 | return NOTIFY_DONE; | |
463 | } | |
464 | ||
eb0b44ad DV |
465 | /** |
466 | * i915_gem_shrinker_init - Initialize i915 shrinker | |
467 | * @dev_priv: i915 device | |
468 | * | |
469 | * This function registers and sets up the i915 shrinker and OOM handler. | |
470 | */ | |
be6a0376 DV |
471 | void i915_gem_shrinker_init(struct drm_i915_private *dev_priv) |
472 | { | |
473 | dev_priv->mm.shrinker.scan_objects = i915_gem_shrinker_scan; | |
474 | dev_priv->mm.shrinker.count_objects = i915_gem_shrinker_count; | |
475 | dev_priv->mm.shrinker.seeks = DEFAULT_SEEKS; | |
a8a40589 | 476 | WARN_ON(register_shrinker(&dev_priv->mm.shrinker)); |
be6a0376 DV |
477 | |
478 | dev_priv->mm.oom_notifier.notifier_call = i915_gem_shrinker_oom; | |
a8a40589 | 479 | WARN_ON(register_oom_notifier(&dev_priv->mm.oom_notifier)); |
e87666b5 CW |
480 | |
481 | dev_priv->mm.vmap_notifier.notifier_call = i915_gem_shrinker_vmap; | |
482 | WARN_ON(register_vmap_purge_notifier(&dev_priv->mm.vmap_notifier)); | |
a8a40589 ID |
483 | } |
484 | ||
485 | /** | |
486 | * i915_gem_shrinker_cleanup - Clean up i915 shrinker | |
487 | * @dev_priv: i915 device | |
488 | * | |
489 | * This function unregisters the i915 shrinker and OOM handler. | |
490 | */ | |
491 | void i915_gem_shrinker_cleanup(struct drm_i915_private *dev_priv) | |
492 | { | |
e87666b5 | 493 | WARN_ON(unregister_vmap_purge_notifier(&dev_priv->mm.vmap_notifier)); |
a8a40589 ID |
494 | WARN_ON(unregister_oom_notifier(&dev_priv->mm.oom_notifier)); |
495 | unregister_shrinker(&dev_priv->mm.shrinker); | |
be6a0376 | 496 | } |