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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 | ||
29 | #include "drmP.h" | |
30 | #include "drm.h" | |
31 | #include "i915_drv.h" | |
32 | #include "i915_drm.h" | |
db53a302 | 33 | #include "i915_trace.h" |
b47eb4a2 | 34 | |
cd377ea9 | 35 | static bool |
05394f39 | 36 | mark_free(struct drm_i915_gem_object *obj, struct list_head *unwind) |
b47eb4a2 | 37 | { |
432e58ed | 38 | list_add(&obj->exec_list, unwind); |
05394f39 CW |
39 | drm_gem_object_reference(&obj->base); |
40 | return drm_mm_scan_add_block(obj->gtt_space); | |
b47eb4a2 CW |
41 | } |
42 | ||
43 | int | |
a6e0aa42 | 44 | i915_gem_evict_something(struct drm_device *dev, int min_size, |
5eac3ab4 | 45 | unsigned alignment, bool mappable) |
b47eb4a2 CW |
46 | { |
47 | drm_i915_private_t *dev_priv = dev->dev_private; | |
cd377ea9 | 48 | struct list_head eviction_list, unwind_list; |
05394f39 | 49 | struct drm_i915_gem_object *obj; |
cd377ea9 | 50 | int ret = 0; |
b47eb4a2 | 51 | |
cd377ea9 | 52 | i915_gem_retire_requests(dev); |
b47eb4a2 | 53 | |
cd377ea9 | 54 | /* Re-check for free space after retiring requests */ |
a6e0aa42 DV |
55 | if (mappable) { |
56 | if (drm_mm_search_free_in_range(&dev_priv->mm.gtt_space, | |
5eac3ab4 | 57 | min_size, alignment, 0, |
a6e0aa42 DV |
58 | dev_priv->mm.gtt_mappable_end, |
59 | 0)) | |
60 | return 0; | |
61 | } else { | |
62 | if (drm_mm_search_free(&dev_priv->mm.gtt_space, | |
63 | min_size, alignment, 0)) | |
64 | return 0; | |
65 | } | |
b47eb4a2 | 66 | |
db53a302 CW |
67 | trace_i915_gem_evict(dev, min_size, alignment, mappable); |
68 | ||
cd377ea9 CW |
69 | /* |
70 | * The goal is to evict objects and amalgamate space in LRU order. | |
71 | * The oldest idle objects reside on the inactive list, which is in | |
72 | * retirement order. The next objects to retire are those on the (per | |
73 | * ring) active list that do not have an outstanding flush. Once the | |
74 | * hardware reports completion (the seqno is updated after the | |
75 | * batchbuffer has been finished) the clean buffer objects would | |
76 | * be retired to the inactive list. Any dirty objects would be added | |
77 | * to the tail of the flushing list. So after processing the clean | |
78 | * active objects we need to emit a MI_FLUSH to retire the flushing | |
79 | * list, hence the retirement order of the flushing list is in | |
80 | * advance of the dirty objects on the active lists. | |
81 | * | |
82 | * The retirement sequence is thus: | |
83 | * 1. Inactive objects (already retired) | |
84 | * 2. Clean active objects | |
85 | * 3. Flushing list | |
86 | * 4. Dirty active objects. | |
87 | * | |
88 | * On each list, the oldest objects lie at the HEAD with the freshest | |
89 | * object on the TAIL. | |
90 | */ | |
91 | ||
92 | INIT_LIST_HEAD(&unwind_list); | |
a6e0aa42 DV |
93 | if (mappable) |
94 | drm_mm_init_scan_with_range(&dev_priv->mm.gtt_space, min_size, | |
95 | alignment, 0, | |
96 | dev_priv->mm.gtt_mappable_end); | |
97 | else | |
98 | drm_mm_init_scan(&dev_priv->mm.gtt_space, min_size, alignment); | |
cd377ea9 CW |
99 | |
100 | /* First see if there is a large enough contiguous idle region... */ | |
05394f39 CW |
101 | list_for_each_entry(obj, &dev_priv->mm.inactive_list, mm_list) { |
102 | if (mark_free(obj, &unwind_list)) | |
cd377ea9 CW |
103 | goto found; |
104 | } | |
b47eb4a2 | 105 | |
cd377ea9 | 106 | /* Now merge in the soon-to-be-expired objects... */ |
05394f39 | 107 | list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list) { |
cd377ea9 | 108 | /* Does the object require an outstanding flush? */ |
05394f39 | 109 | if (obj->base.write_domain || obj->pin_count) |
b47eb4a2 | 110 | continue; |
b47eb4a2 | 111 | |
05394f39 | 112 | if (mark_free(obj, &unwind_list)) |
cd377ea9 CW |
113 | goto found; |
114 | } | |
b47eb4a2 | 115 | |
cd377ea9 | 116 | /* Finally add anything with a pending flush (in order of retirement) */ |
05394f39 CW |
117 | list_for_each_entry(obj, &dev_priv->mm.flushing_list, mm_list) { |
118 | if (obj->pin_count) | |
cd377ea9 | 119 | continue; |
b47eb4a2 | 120 | |
05394f39 | 121 | if (mark_free(obj, &unwind_list)) |
cd377ea9 CW |
122 | goto found; |
123 | } | |
05394f39 CW |
124 | list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list) { |
125 | if (! obj->base.write_domain || obj->pin_count) | |
b47eb4a2 | 126 | continue; |
b47eb4a2 | 127 | |
05394f39 | 128 | if (mark_free(obj, &unwind_list)) |
cd377ea9 CW |
129 | goto found; |
130 | } | |
131 | ||
132 | /* Nothing found, clean up and bail out! */ | |
092de6f2 CW |
133 | while (!list_empty(&unwind_list)) { |
134 | obj = list_first_entry(&unwind_list, | |
135 | struct drm_i915_gem_object, | |
136 | exec_list); | |
137 | ||
05394f39 | 138 | ret = drm_mm_scan_remove_block(obj->gtt_space); |
cd377ea9 | 139 | BUG_ON(ret); |
092de6f2 CW |
140 | |
141 | list_del_init(&obj->exec_list); | |
05394f39 | 142 | drm_gem_object_unreference(&obj->base); |
cd377ea9 CW |
143 | } |
144 | ||
145 | /* We expect the caller to unpin, evict all and try again, or give up. | |
146 | * So calling i915_gem_evict_everything() is unnecessary. | |
147 | */ | |
148 | return -ENOSPC; | |
149 | ||
150 | found: | |
e39a0150 CW |
151 | /* drm_mm doesn't allow any other other operations while |
152 | * scanning, therefore store to be evicted objects on a | |
153 | * temporary list. */ | |
cd377ea9 | 154 | INIT_LIST_HEAD(&eviction_list); |
e39a0150 | 155 | while (!list_empty(&unwind_list)) { |
05394f39 CW |
156 | obj = list_first_entry(&unwind_list, |
157 | struct drm_i915_gem_object, | |
432e58ed | 158 | exec_list); |
05394f39 | 159 | if (drm_mm_scan_remove_block(obj->gtt_space)) { |
432e58ed | 160 | list_move(&obj->exec_list, &eviction_list); |
e39a0150 CW |
161 | continue; |
162 | } | |
432e58ed | 163 | list_del_init(&obj->exec_list); |
05394f39 | 164 | drm_gem_object_unreference(&obj->base); |
cd377ea9 | 165 | } |
b47eb4a2 | 166 | |
cd377ea9 | 167 | /* Unbinding will emit any required flushes */ |
e39a0150 | 168 | while (!list_empty(&eviction_list)) { |
05394f39 CW |
169 | obj = list_first_entry(&eviction_list, |
170 | struct drm_i915_gem_object, | |
432e58ed | 171 | exec_list); |
e39a0150 | 172 | if (ret == 0) |
05394f39 | 173 | ret = i915_gem_object_unbind(obj); |
092de6f2 | 174 | |
432e58ed | 175 | list_del_init(&obj->exec_list); |
05394f39 | 176 | drm_gem_object_unreference(&obj->base); |
b47eb4a2 | 177 | } |
cd377ea9 | 178 | |
e39a0150 | 179 | return ret; |
b47eb4a2 CW |
180 | } |
181 | ||
182 | int | |
5eac3ab4 | 183 | i915_gem_evict_everything(struct drm_device *dev, bool purgeable_only) |
b47eb4a2 CW |
184 | { |
185 | drm_i915_private_t *dev_priv = dev->dev_private; | |
186 | int ret; | |
187 | bool lists_empty; | |
188 | ||
b47eb4a2 CW |
189 | lists_empty = (list_empty(&dev_priv->mm.inactive_list) && |
190 | list_empty(&dev_priv->mm.flushing_list) && | |
395b70be | 191 | list_empty(&dev_priv->mm.active_list)); |
b47eb4a2 CW |
192 | if (lists_empty) |
193 | return -ENOSPC; | |
194 | ||
db53a302 CW |
195 | trace_i915_gem_evict_everything(dev, purgeable_only); |
196 | ||
b47eb4a2 CW |
197 | /* Flush everything (on to the inactive lists) and evict */ |
198 | ret = i915_gpu_idle(dev); | |
199 | if (ret) | |
200 | return ret; | |
201 | ||
202 | BUG_ON(!list_empty(&dev_priv->mm.flushing_list)); | |
203 | ||
5eac3ab4 | 204 | return i915_gem_evict_inactive(dev, purgeable_only); |
b47eb4a2 CW |
205 | } |
206 | ||
207 | /** Unbinds all inactive objects. */ | |
208 | int | |
5eac3ab4 | 209 | i915_gem_evict_inactive(struct drm_device *dev, bool purgeable_only) |
b47eb4a2 CW |
210 | { |
211 | drm_i915_private_t *dev_priv = dev->dev_private; | |
5eac3ab4 CW |
212 | struct drm_i915_gem_object *obj, *next; |
213 | ||
214 | list_for_each_entry_safe(obj, next, | |
215 | &dev_priv->mm.inactive_list, mm_list) { | |
216 | if (!purgeable_only || obj->madv != I915_MADV_WILLNEED) { | |
05394f39 | 217 | int ret = i915_gem_object_unbind(obj); |
5eac3ab4 CW |
218 | if (ret) |
219 | return ret; | |
b47eb4a2 CW |
220 | } |
221 | } | |
222 | ||
223 | return 0; | |
224 | } |