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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 | ||
760285e7 | 29 | #include <drm/drmP.h> |
b47eb4a2 | 30 | #include "i915_drv.h" |
760285e7 | 31 | #include <drm/i915_drm.h> |
db53a302 | 32 | #include "i915_trace.h" |
b47eb4a2 | 33 | |
cd377ea9 | 34 | static bool |
05394f39 | 35 | mark_free(struct drm_i915_gem_object *obj, struct list_head *unwind) |
b47eb4a2 | 36 | { |
a70a3148 BW |
37 | struct drm_device *dev = obj->base.dev; |
38 | struct drm_i915_private *dev_priv = dev->dev_private; | |
39 | struct i915_vma *vma = i915_gem_obj_to_vma(obj, &dev_priv->gtt.base); | |
2f633156 | 40 | |
1b50247a CW |
41 | if (obj->pin_count) |
42 | return false; | |
43 | ||
432e58ed | 44 | list_add(&obj->exec_list, unwind); |
2f633156 | 45 | return drm_mm_scan_add_block(&vma->node); |
b47eb4a2 CW |
46 | } |
47 | ||
48 | int | |
a6e0aa42 | 49 | i915_gem_evict_something(struct drm_device *dev, int min_size, |
42d6ab48 | 50 | unsigned alignment, unsigned cache_level, |
86a1ee26 | 51 | bool mappable, bool nonblocking) |
b47eb4a2 CW |
52 | { |
53 | drm_i915_private_t *dev_priv = dev->dev_private; | |
5cef07e1 | 54 | struct i915_address_space *vm = &dev_priv->gtt.base; |
cd377ea9 | 55 | struct list_head eviction_list, unwind_list; |
2f633156 | 56 | struct i915_vma *vma; |
05394f39 | 57 | struct drm_i915_gem_object *obj; |
cd377ea9 | 58 | int ret = 0; |
b47eb4a2 | 59 | |
db53a302 CW |
60 | trace_i915_gem_evict(dev, min_size, alignment, mappable); |
61 | ||
cd377ea9 CW |
62 | /* |
63 | * The goal is to evict objects and amalgamate space in LRU order. | |
64 | * The oldest idle objects reside on the inactive list, which is in | |
65 | * retirement order. The next objects to retire are those on the (per | |
66 | * ring) active list that do not have an outstanding flush. Once the | |
67 | * hardware reports completion (the seqno is updated after the | |
68 | * batchbuffer has been finished) the clean buffer objects would | |
69 | * be retired to the inactive list. Any dirty objects would be added | |
70 | * to the tail of the flushing list. So after processing the clean | |
71 | * active objects we need to emit a MI_FLUSH to retire the flushing | |
72 | * list, hence the retirement order of the flushing list is in | |
73 | * advance of the dirty objects on the active lists. | |
74 | * | |
75 | * The retirement sequence is thus: | |
76 | * 1. Inactive objects (already retired) | |
77 | * 2. Clean active objects | |
78 | * 3. Flushing list | |
79 | * 4. Dirty active objects. | |
80 | * | |
81 | * On each list, the oldest objects lie at the HEAD with the freshest | |
82 | * object on the TAIL. | |
83 | */ | |
84 | ||
85 | INIT_LIST_HEAD(&unwind_list); | |
a6e0aa42 | 86 | if (mappable) |
5cef07e1 | 87 | drm_mm_init_scan_with_range(&vm->mm, min_size, |
93bd8649 BW |
88 | alignment, cache_level, 0, |
89 | dev_priv->gtt.mappable_end); | |
a6e0aa42 | 90 | else |
5cef07e1 | 91 | drm_mm_init_scan(&vm->mm, min_size, alignment, cache_level); |
cd377ea9 CW |
92 | |
93 | /* First see if there is a large enough contiguous idle region... */ | |
5cef07e1 | 94 | list_for_each_entry(obj, &vm->inactive_list, mm_list) { |
05394f39 | 95 | if (mark_free(obj, &unwind_list)) |
cd377ea9 CW |
96 | goto found; |
97 | } | |
b47eb4a2 | 98 | |
86a1ee26 CW |
99 | if (nonblocking) |
100 | goto none; | |
b47eb4a2 | 101 | |
cd377ea9 | 102 | /* Now merge in the soon-to-be-expired objects... */ |
5cef07e1 | 103 | list_for_each_entry(obj, &vm->active_list, mm_list) { |
05394f39 | 104 | if (mark_free(obj, &unwind_list)) |
cd377ea9 CW |
105 | goto found; |
106 | } | |
107 | ||
86a1ee26 | 108 | none: |
cd377ea9 | 109 | /* Nothing found, clean up and bail out! */ |
092de6f2 CW |
110 | while (!list_empty(&unwind_list)) { |
111 | obj = list_first_entry(&unwind_list, | |
112 | struct drm_i915_gem_object, | |
113 | exec_list); | |
a70a3148 | 114 | vma = i915_gem_obj_to_vma(obj, &dev_priv->gtt.base); |
2f633156 | 115 | ret = drm_mm_scan_remove_block(&vma->node); |
cd377ea9 | 116 | BUG_ON(ret); |
092de6f2 CW |
117 | |
118 | list_del_init(&obj->exec_list); | |
cd377ea9 CW |
119 | } |
120 | ||
121 | /* We expect the caller to unpin, evict all and try again, or give up. | |
122 | * So calling i915_gem_evict_everything() is unnecessary. | |
123 | */ | |
124 | return -ENOSPC; | |
125 | ||
126 | found: | |
e39a0150 CW |
127 | /* drm_mm doesn't allow any other other operations while |
128 | * scanning, therefore store to be evicted objects on a | |
129 | * temporary list. */ | |
cd377ea9 | 130 | INIT_LIST_HEAD(&eviction_list); |
e39a0150 | 131 | while (!list_empty(&unwind_list)) { |
05394f39 CW |
132 | obj = list_first_entry(&unwind_list, |
133 | struct drm_i915_gem_object, | |
432e58ed | 134 | exec_list); |
a70a3148 | 135 | vma = i915_gem_obj_to_vma(obj, &dev_priv->gtt.base); |
2f633156 | 136 | if (drm_mm_scan_remove_block(&vma->node)) { |
432e58ed | 137 | list_move(&obj->exec_list, &eviction_list); |
b6708242 | 138 | drm_gem_object_reference(&obj->base); |
e39a0150 CW |
139 | continue; |
140 | } | |
432e58ed | 141 | list_del_init(&obj->exec_list); |
cd377ea9 | 142 | } |
b47eb4a2 | 143 | |
cd377ea9 | 144 | /* Unbinding will emit any required flushes */ |
e39a0150 | 145 | while (!list_empty(&eviction_list)) { |
05394f39 CW |
146 | obj = list_first_entry(&eviction_list, |
147 | struct drm_i915_gem_object, | |
432e58ed | 148 | exec_list); |
e39a0150 | 149 | if (ret == 0) |
07fe0b12 | 150 | ret = i915_gem_object_ggtt_unbind(obj); |
092de6f2 | 151 | |
432e58ed | 152 | list_del_init(&obj->exec_list); |
05394f39 | 153 | drm_gem_object_unreference(&obj->base); |
b47eb4a2 | 154 | } |
cd377ea9 | 155 | |
e39a0150 | 156 | return ret; |
b47eb4a2 CW |
157 | } |
158 | ||
159 | int | |
6c085a72 | 160 | i915_gem_evict_everything(struct drm_device *dev) |
b47eb4a2 CW |
161 | { |
162 | drm_i915_private_t *dev_priv = dev->dev_private; | |
5cef07e1 | 163 | struct i915_address_space *vm = &dev_priv->gtt.base; |
a39d7efc | 164 | struct drm_i915_gem_object *obj, *next; |
b47eb4a2 | 165 | bool lists_empty; |
b4519513 | 166 | int ret; |
b47eb4a2 | 167 | |
5cef07e1 BW |
168 | lists_empty = (list_empty(&vm->inactive_list) && |
169 | list_empty(&vm->active_list)); | |
b47eb4a2 CW |
170 | if (lists_empty) |
171 | return -ENOSPC; | |
172 | ||
6c085a72 | 173 | trace_i915_gem_evict_everything(dev); |
db53a302 | 174 | |
b2da9fe5 BW |
175 | /* The gpu_idle will flush everything in the write domain to the |
176 | * active list. Then we must move everything off the active list | |
177 | * with retire requests. | |
178 | */ | |
b4519513 CW |
179 | ret = i915_gpu_idle(dev); |
180 | if (ret) | |
181 | return ret; | |
b2da9fe5 BW |
182 | |
183 | i915_gem_retire_requests(dev); | |
184 | ||
a39d7efc | 185 | /* Having flushed everything, unbind() should never raise an error */ |
5cef07e1 | 186 | list_for_each_entry_safe(obj, next, &vm->inactive_list, mm_list) |
6c085a72 | 187 | if (obj->pin_count == 0) |
07fe0b12 | 188 | WARN_ON(i915_gem_object_ggtt_unbind(obj)); |
b47eb4a2 | 189 | |
b4519513 | 190 | return 0; |
b47eb4a2 | 191 | } |