Commit | Line | Data |
---|---|---|
b47eb4a2 CW |
1 | /* |
2 | * Copyright © 2008-2010 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 | * Eric Anholt <eric@anholt.net> | |
25 | * Chris Wilson <chris@chris-wilson.co.uuk> | |
26 | * | |
27 | */ | |
28 | ||
760285e7 | 29 | #include <drm/drmP.h> |
760285e7 | 30 | #include <drm/i915_drm.h> |
74e21ac2 CW |
31 | |
32 | #include "i915_drv.h" | |
33 | #include "intel_drv.h" | |
db53a302 | 34 | #include "i915_trace.h" |
b47eb4a2 | 35 | |
80b204bc | 36 | static bool ggtt_is_idle(struct drm_i915_private *dev_priv) |
9332f3b1 | 37 | { |
80b204bc | 38 | struct i915_ggtt *ggtt = &dev_priv->ggtt; |
9332f3b1 | 39 | struct intel_engine_cs *engine; |
3b3f1650 | 40 | enum intel_engine_id id; |
9332f3b1 | 41 | |
3b3f1650 | 42 | for_each_engine(engine, dev_priv, id) { |
80b204bc CW |
43 | struct intel_timeline *tl; |
44 | ||
45 | tl = &ggtt->base.timeline.engine[engine->id]; | |
46 | if (i915_gem_active_isset(&tl->last_request)) | |
9332f3b1 CW |
47 | return false; |
48 | } | |
49 | ||
50 | return true; | |
51 | } | |
52 | ||
cd377ea9 | 53 | static bool |
9a71e277 CW |
54 | mark_free(struct drm_mm_scan *scan, |
55 | struct i915_vma *vma, | |
56 | unsigned int flags, | |
57 | struct list_head *unwind) | |
b47eb4a2 | 58 | { |
20dfbde4 | 59 | if (i915_vma_is_pinned(vma)) |
1b50247a CW |
60 | return false; |
61 | ||
b93dab6e DV |
62 | if (WARN_ON(!list_empty(&vma->exec_list))) |
63 | return false; | |
64 | ||
275f039d | 65 | if (flags & PIN_NONFAULT && !list_empty(&vma->obj->userfault_link)) |
82118877 CW |
66 | return false; |
67 | ||
82a55ad1 | 68 | list_add(&vma->exec_list, unwind); |
9a71e277 | 69 | return drm_mm_scan_add_block(scan, &vma->node); |
b47eb4a2 CW |
70 | } |
71 | ||
c2c1d491 DV |
72 | /** |
73 | * i915_gem_evict_something - Evict vmas to make room for binding a new one | |
c2c1d491 | 74 | * @vm: address space to evict from |
7838a63a | 75 | * @min_size: size of the desired free space |
c2c1d491 DV |
76 | * @alignment: alignment constraint of the desired free space |
77 | * @cache_level: cache_level for the desired space | |
7838a63a DV |
78 | * @start: start (inclusive) of the range from which to evict objects |
79 | * @end: end (exclusive) of the range from which to evict objects | |
80 | * @flags: additional flags to control the eviction algorithm | |
c2c1d491 DV |
81 | * |
82 | * This function will try to evict vmas until a free space satisfying the | |
83 | * requirements is found. Callers must check first whether any such hole exists | |
84 | * already before calling this function. | |
85 | * | |
86 | * This function is used by the object/vma binding code. | |
87 | * | |
eb0b44ad DV |
88 | * Since this function is only used to free up virtual address space it only |
89 | * ignores pinned vmas, and not object where the backing storage itself is | |
90 | * pinned. Hence obj->pages_pin_count does not protect against eviction. | |
91 | * | |
c2c1d491 DV |
92 | * To clarify: This is for freeing up virtual address space, not for freeing |
93 | * memory in e.g. the shrinker. | |
94 | */ | |
b47eb4a2 | 95 | int |
e522ac23 | 96 | i915_gem_evict_something(struct i915_address_space *vm, |
2ffffd0f CW |
97 | u64 min_size, u64 alignment, |
98 | unsigned cache_level, | |
99 | u64 start, u64 end, | |
1ec9e26d | 100 | unsigned flags) |
b47eb4a2 | 101 | { |
49d73912 | 102 | struct drm_i915_private *dev_priv = vm->i915; |
9a71e277 | 103 | struct drm_mm_scan scan; |
9332f3b1 CW |
104 | struct list_head eviction_list; |
105 | struct list_head *phases[] = { | |
106 | &vm->inactive_list, | |
107 | &vm->active_list, | |
108 | NULL, | |
109 | }, **phase; | |
110 | struct i915_vma *vma, *next; | |
3fa489da | 111 | struct drm_mm_node *node; |
4e64e553 | 112 | enum drm_mm_insert_mode mode; |
9332f3b1 | 113 | int ret; |
b47eb4a2 | 114 | |
49d73912 | 115 | lockdep_assert_held(&vm->i915->drm.struct_mutex); |
e522ac23 | 116 | trace_i915_gem_evict(vm, min_size, alignment, flags); |
db53a302 | 117 | |
cd377ea9 CW |
118 | /* |
119 | * The goal is to evict objects and amalgamate space in LRU order. | |
120 | * The oldest idle objects reside on the inactive list, which is in | |
9332f3b1 CW |
121 | * retirement order. The next objects to retire are those in flight, |
122 | * on the active list, again in retirement order. | |
cd377ea9 CW |
123 | * |
124 | * The retirement sequence is thus: | |
125 | * 1. Inactive objects (already retired) | |
9332f3b1 | 126 | * 2. Active objects (will stall on unbinding) |
cd377ea9 CW |
127 | * |
128 | * On each list, the oldest objects lie at the HEAD with the freshest | |
129 | * object on the TAIL. | |
130 | */ | |
4e64e553 CW |
131 | mode = DRM_MM_INSERT_BEST; |
132 | if (flags & PIN_HIGH) | |
133 | mode = DRM_MM_INSERT_HIGH; | |
134 | if (flags & PIN_MAPPABLE) | |
135 | mode = DRM_MM_INSERT_LOW; | |
2c4b3895 CW |
136 | drm_mm_scan_init_with_range(&scan, &vm->mm, |
137 | min_size, alignment, cache_level, | |
4e64e553 | 138 | start, end, mode); |
cd377ea9 | 139 | |
7155b057 CW |
140 | /* Retire before we search the active list. Although we have |
141 | * reasonable accuracy in our retirement lists, we may have | |
142 | * a stray pin (preventing eviction) that can only be resolved by | |
143 | * retiring. | |
144 | */ | |
145 | if (!(flags & PIN_NONBLOCK)) | |
146 | i915_gem_retire_requests(dev_priv); | |
147 | else | |
9332f3b1 | 148 | phases[1] = NULL; |
b47eb4a2 | 149 | |
9332f3b1 CW |
150 | search_again: |
151 | INIT_LIST_HEAD(&eviction_list); | |
152 | phase = phases; | |
153 | do { | |
154 | list_for_each_entry(vma, *phase, vm_link) | |
9a71e277 | 155 | if (mark_free(&scan, vma, flags, &eviction_list)) |
9332f3b1 CW |
156 | goto found; |
157 | } while (*++phase); | |
cd377ea9 CW |
158 | |
159 | /* Nothing found, clean up and bail out! */ | |
9332f3b1 | 160 | list_for_each_entry_safe(vma, next, &eviction_list, exec_list) { |
9a71e277 | 161 | ret = drm_mm_scan_remove_block(&scan, &vma->node); |
cd377ea9 | 162 | BUG_ON(ret); |
092de6f2 | 163 | |
9332f3b1 | 164 | INIT_LIST_HEAD(&vma->exec_list); |
cd377ea9 CW |
165 | } |
166 | ||
ad071acb | 167 | /* Can we unpin some objects such as idle hw contents, |
9332f3b1 CW |
168 | * or pending flips? But since only the GGTT has global entries |
169 | * such as scanouts, rinbuffers and contexts, we can skip the | |
170 | * purge when inspecting per-process local address spaces. | |
cd377ea9 | 171 | */ |
9332f3b1 | 172 | if (!i915_is_ggtt(vm) || flags & PIN_NONBLOCK) |
74e21ac2 | 173 | return -ENOSPC; |
ad071acb | 174 | |
80b204bc | 175 | if (ggtt_is_idle(dev_priv)) { |
9332f3b1 CW |
176 | /* If we still have pending pageflip completions, drop |
177 | * back to userspace to give our workqueues time to | |
178 | * acquire our locks and unpin the old scanouts. | |
179 | */ | |
49d73912 | 180 | return intel_has_pending_fb_unpin(dev_priv) ? -EAGAIN : -ENOSPC; |
74e21ac2 CW |
181 | } |
182 | ||
9332f3b1 CW |
183 | /* Not everything in the GGTT is tracked via vma (otherwise we |
184 | * could evict as required with minimal stalling) so we are forced | |
185 | * to idle the GPU and explicitly retire outstanding requests in | |
186 | * the hopes that we can then remove contexts and the like only | |
187 | * bound by their active reference. | |
74e21ac2 | 188 | */ |
9332f3b1 CW |
189 | ret = i915_gem_switch_to_kernel_context(dev_priv); |
190 | if (ret) | |
191 | return ret; | |
192 | ||
22dd3bb9 CW |
193 | ret = i915_gem_wait_for_idle(dev_priv, |
194 | I915_WAIT_INTERRUPTIBLE | | |
195 | I915_WAIT_LOCKED); | |
9332f3b1 CW |
196 | if (ret) |
197 | return ret; | |
198 | ||
9332f3b1 | 199 | goto search_again; |
cd377ea9 CW |
200 | |
201 | found: | |
e39a0150 | 202 | /* drm_mm doesn't allow any other other operations while |
9332f3b1 CW |
203 | * scanning, therefore store to-be-evicted objects on a |
204 | * temporary list and take a reference for all before | |
205 | * calling unbind (which may remove the active reference | |
206 | * of any of our objects, thus corrupting the list). | |
207 | */ | |
208 | list_for_each_entry_safe(vma, next, &eviction_list, exec_list) { | |
9a71e277 | 209 | if (drm_mm_scan_remove_block(&scan, &vma->node)) |
20dfbde4 | 210 | __i915_vma_pin(vma); |
9332f3b1 CW |
211 | else |
212 | list_del_init(&vma->exec_list); | |
cd377ea9 | 213 | } |
b47eb4a2 | 214 | |
cd377ea9 | 215 | /* Unbinding will emit any required flushes */ |
121dfbb2 | 216 | ret = 0; |
e39a0150 | 217 | while (!list_empty(&eviction_list)) { |
82a55ad1 BW |
218 | vma = list_first_entry(&eviction_list, |
219 | struct i915_vma, | |
432e58ed | 220 | exec_list); |
8637b407 | 221 | |
8637b407 | 222 | list_del_init(&vma->exec_list); |
20dfbde4 | 223 | __i915_vma_unpin(vma); |
e39a0150 | 224 | if (ret == 0) |
82a55ad1 | 225 | ret = i915_vma_unbind(vma); |
b47eb4a2 | 226 | } |
3fa489da CW |
227 | |
228 | while (ret == 0 && (node = drm_mm_scan_color_evict(&scan))) { | |
229 | vma = container_of(node, struct i915_vma, node); | |
230 | ret = i915_vma_unbind(vma); | |
231 | } | |
232 | ||
e39a0150 | 233 | return ret; |
b47eb4a2 CW |
234 | } |
235 | ||
172ae5b4 CW |
236 | /** |
237 | * i915_gem_evict_for_vma - Evict vmas to make room for binding a new one | |
625d988a CW |
238 | * @vm: address space to evict from |
239 | * @target: range (and color) to evict for | |
172ae5b4 CW |
240 | * @flags: additional flags to control the eviction algorithm |
241 | * | |
242 | * This function will try to evict vmas that overlap the target node. | |
243 | * | |
244 | * To clarify: This is for freeing up virtual address space, not for freeing | |
245 | * memory in e.g. the shrinker. | |
246 | */ | |
625d988a CW |
247 | int i915_gem_evict_for_node(struct i915_address_space *vm, |
248 | struct drm_mm_node *target, | |
249 | unsigned int flags) | |
506a8e87 | 250 | { |
172ae5b4 CW |
251 | LIST_HEAD(eviction_list); |
252 | struct drm_mm_node *node; | |
625d988a CW |
253 | u64 start = target->start; |
254 | u64 end = start + target->size; | |
172ae5b4 CW |
255 | struct i915_vma *vma, *next; |
256 | bool check_color; | |
257 | int ret = 0; | |
506a8e87 | 258 | |
625d988a | 259 | lockdep_assert_held(&vm->i915->drm.struct_mutex); |
a6508ded CW |
260 | GEM_BUG_ON(!IS_ALIGNED(start, I915_GTT_PAGE_SIZE)); |
261 | GEM_BUG_ON(!IS_ALIGNED(end, I915_GTT_PAGE_SIZE)); | |
262 | ||
625d988a | 263 | trace_i915_gem_evict_node(vm, target, flags); |
172ae5b4 | 264 | |
7155b057 CW |
265 | /* Retire before we search the active list. Although we have |
266 | * reasonable accuracy in our retirement lists, we may have | |
267 | * a stray pin (preventing eviction) that can only be resolved by | |
268 | * retiring. | |
269 | */ | |
270 | if (!(flags & PIN_NONBLOCK)) | |
625d988a | 271 | i915_gem_retire_requests(vm->i915); |
7155b057 | 272 | |
625d988a | 273 | check_color = vm->mm.color_adjust; |
172ae5b4 CW |
274 | if (check_color) { |
275 | /* Expand search to cover neighbouring guard pages (or lack!) */ | |
381b943b | 276 | if (start) |
f51455d4 | 277 | start -= I915_GTT_PAGE_SIZE; |
a6508ded CW |
278 | |
279 | /* Always look at the page afterwards to avoid the end-of-GTT */ | |
280 | end += I915_GTT_PAGE_SIZE; | |
172ae5b4 | 281 | } |
a6508ded | 282 | GEM_BUG_ON(start >= end); |
4c7d62c6 | 283 | |
625d988a | 284 | drm_mm_for_each_node_in_range(node, &vm->mm, start, end) { |
172ae5b4 CW |
285 | /* If we find any non-objects (!vma), we cannot evict them */ |
286 | if (node->color == I915_COLOR_UNEVICTABLE) { | |
287 | ret = -ENOSPC; | |
506a8e87 | 288 | break; |
172ae5b4 | 289 | } |
506a8e87 | 290 | |
a6508ded | 291 | GEM_BUG_ON(!node->allocated); |
506a8e87 CW |
292 | vma = container_of(node, typeof(*vma), node); |
293 | ||
172ae5b4 CW |
294 | /* If we are using coloring to insert guard pages between |
295 | * different cache domains within the address space, we have | |
296 | * to check whether the objects on either side of our range | |
297 | * abutt and conflict. If they are in conflict, then we evict | |
298 | * those as well to make room for our guard pages. | |
299 | */ | |
300 | if (check_color) { | |
fe65cbdb MA |
301 | if (node->start + node->size == target->start) { |
302 | if (node->color == target->color) | |
172ae5b4 CW |
303 | continue; |
304 | } | |
fe65cbdb MA |
305 | if (node->start == target->start + target->size) { |
306 | if (node->color == target->color) | |
172ae5b4 CW |
307 | continue; |
308 | } | |
309 | } | |
506a8e87 | 310 | |
172ae5b4 CW |
311 | if (flags & PIN_NONBLOCK && |
312 | (i915_vma_is_pinned(vma) || i915_vma_is_active(vma))) { | |
313 | ret = -ENOSPC; | |
314 | break; | |
315 | } | |
506a8e87 | 316 | |
172ae5b4 | 317 | /* Overlap of objects in the same batch? */ |
16ee2061 | 318 | if (i915_vma_is_pinned(vma) || !list_empty(&vma->exec_list)) { |
172ae5b4 CW |
319 | ret = -ENOSPC; |
320 | if (vma->exec_entry && | |
321 | vma->exec_entry->flags & EXEC_OBJECT_PINNED) | |
322 | ret = -EINVAL; | |
323 | break; | |
506a8e87 CW |
324 | } |
325 | ||
172ae5b4 CW |
326 | /* Never show fear in the face of dragons! |
327 | * | |
328 | * We cannot directly remove this node from within this | |
329 | * iterator and as with i915_gem_evict_something() we employ | |
330 | * the vma pin_count in order to prevent the action of | |
331 | * unbinding one vma from freeing (by dropping its active | |
332 | * reference) another in our eviction list. | |
333 | */ | |
334 | __i915_vma_pin(vma); | |
335 | list_add(&vma->exec_list, &eviction_list); | |
336 | } | |
337 | ||
338 | list_for_each_entry_safe(vma, next, &eviction_list, exec_list) { | |
339 | list_del_init(&vma->exec_list); | |
340 | __i915_vma_unpin(vma); | |
341 | if (ret == 0) | |
342 | ret = i915_vma_unbind(vma); | |
506a8e87 CW |
343 | } |
344 | ||
172ae5b4 | 345 | return ret; |
506a8e87 CW |
346 | } |
347 | ||
68c8c17f | 348 | /** |
c2c1d491 | 349 | * i915_gem_evict_vm - Evict all idle vmas from a vm |
c2c1d491 | 350 | * @vm: Address space to cleanse |
68c8c17f BW |
351 | * @do_idle: Boolean directing whether to idle first. |
352 | * | |
c2c1d491 DV |
353 | * This function evicts all idles vmas from a vm. If all unpinned vmas should be |
354 | * evicted the @do_idle needs to be set to true. | |
68c8c17f | 355 | * |
c2c1d491 DV |
356 | * This is used by the execbuf code as a last-ditch effort to defragment the |
357 | * address space. | |
358 | * | |
359 | * To clarify: This is for freeing up virtual address space, not for freeing | |
360 | * memory in e.g. the shrinker. | |
68c8c17f BW |
361 | */ |
362 | int i915_gem_evict_vm(struct i915_address_space *vm, bool do_idle) | |
7b796122 BW |
363 | { |
364 | struct i915_vma *vma, *next; | |
365 | int ret; | |
366 | ||
49d73912 | 367 | lockdep_assert_held(&vm->i915->drm.struct_mutex); |
bcccff84 BW |
368 | trace_i915_gem_evict_vm(vm); |
369 | ||
7b796122 | 370 | if (do_idle) { |
49d73912 | 371 | struct drm_i915_private *dev_priv = vm->i915; |
6e5a5beb | 372 | |
883445d4 | 373 | if (i915_is_ggtt(vm)) { |
945657b4 | 374 | ret = i915_gem_switch_to_kernel_context(dev_priv); |
883445d4 CW |
375 | if (ret) |
376 | return ret; | |
377 | } | |
6e5a5beb | 378 | |
22dd3bb9 CW |
379 | ret = i915_gem_wait_for_idle(dev_priv, |
380 | I915_WAIT_INTERRUPTIBLE | | |
381 | I915_WAIT_LOCKED); | |
7b796122 BW |
382 | if (ret) |
383 | return ret; | |
384 | ||
b9b5dce5 | 385 | WARN_ON(!list_empty(&vm->active_list)); |
7b796122 BW |
386 | } |
387 | ||
1c7f4bca | 388 | list_for_each_entry_safe(vma, next, &vm->inactive_list, vm_link) |
20dfbde4 | 389 | if (!i915_vma_is_pinned(vma)) |
7b796122 BW |
390 | WARN_ON(i915_vma_unbind(vma)); |
391 | ||
392 | return 0; | |
393 | } | |
f40a7b75 CW |
394 | |
395 | #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST) | |
396 | #include "selftests/i915_gem_evict.c" | |
397 | #endif |