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Commit | Line | Data |
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f97fbf96 CW |
1 | /* |
2 | * Copyright © 2016 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 "mock_engine.h" | |
0daf0113 | 26 | #include "mock_request.h" |
f97fbf96 | 27 | |
a89d1f92 CW |
28 | struct mock_ring { |
29 | struct intel_ring base; | |
30 | struct i915_timeline timeline; | |
31 | }; | |
32 | ||
5013eb8c CW |
33 | static void mock_timeline_pin(struct i915_timeline *tl) |
34 | { | |
35 | tl->pin_count++; | |
36 | } | |
37 | ||
38 | static void mock_timeline_unpin(struct i915_timeline *tl) | |
39 | { | |
40 | GEM_BUG_ON(!tl->pin_count); | |
41 | tl->pin_count--; | |
42 | } | |
43 | ||
209760b7 CW |
44 | static struct intel_ring *mock_ring(struct intel_engine_cs *engine) |
45 | { | |
46 | const unsigned long sz = PAGE_SIZE / 2; | |
47 | struct mock_ring *ring; | |
48 | ||
49 | ring = kzalloc(sizeof(*ring) + sz, GFP_KERNEL); | |
50 | if (!ring) | |
51 | return NULL; | |
52 | ||
52954edd CW |
53 | if (i915_timeline_init(engine->i915, |
54 | &ring->timeline, engine->name, | |
55 | NULL)) { | |
56 | kfree(ring); | |
57 | return NULL; | |
58 | } | |
209760b7 CW |
59 | |
60 | ring->base.size = sz; | |
61 | ring->base.effective_size = sz; | |
62 | ring->base.vaddr = (void *)(ring + 1); | |
63 | ring->base.timeline = &ring->timeline; | |
64 | ||
65 | INIT_LIST_HEAD(&ring->base.request_list); | |
66 | intel_ring_update_space(&ring->base); | |
67 | ||
68 | return &ring->base; | |
69 | } | |
70 | ||
71 | static void mock_ring_free(struct intel_ring *base) | |
72 | { | |
73 | struct mock_ring *ring = container_of(base, typeof(*ring), base); | |
74 | ||
75 | i915_timeline_fini(&ring->timeline); | |
76 | kfree(ring); | |
77 | } | |
78 | ||
0daf0113 | 79 | static struct mock_request *first_request(struct mock_engine *engine) |
f97fbf96 | 80 | { |
0daf0113 CW |
81 | return list_first_entry_or_null(&engine->hw_queue, |
82 | struct mock_request, | |
83 | link); | |
84 | } | |
85 | ||
1579ab2d | 86 | static void advance(struct mock_request *request) |
b1f9107e CW |
87 | { |
88 | list_del_init(&request->link); | |
52c0fdb2 CW |
89 | intel_engine_write_global_seqno(request->base.engine, |
90 | request->base.global_seqno); | |
5013eb8c CW |
91 | i915_request_mark_complete(&request->base); |
92 | GEM_BUG_ON(!i915_request_completed(&request->base)); | |
52c0fdb2 CW |
93 | |
94 | intel_engine_queue_breadcrumbs(request->base.engine); | |
b1f9107e CW |
95 | } |
96 | ||
39cbf2aa | 97 | static void hw_delay_complete(struct timer_list *t) |
0daf0113 | 98 | { |
39cbf2aa | 99 | struct mock_engine *engine = from_timer(engine, t, hw_delay); |
0daf0113 | 100 | struct mock_request *request; |
52c0fdb2 | 101 | unsigned long flags; |
0daf0113 | 102 | |
52c0fdb2 | 103 | spin_lock_irqsave(&engine->hw_lock, flags); |
0daf0113 | 104 | |
b1f9107e | 105 | /* Timer fired, first request is complete */ |
0daf0113 CW |
106 | request = first_request(engine); |
107 | if (request) | |
1579ab2d | 108 | advance(request); |
b1f9107e CW |
109 | |
110 | /* | |
111 | * Also immediately signal any subsequent 0-delay requests, but | |
112 | * requeue the timer for the next delayed request. | |
113 | */ | |
114 | while ((request = first_request(engine))) { | |
115 | if (request->delay) { | |
116 | mod_timer(&engine->hw_delay, jiffies + request->delay); | |
117 | break; | |
118 | } | |
119 | ||
1579ab2d | 120 | advance(request); |
b1f9107e | 121 | } |
0daf0113 | 122 | |
52c0fdb2 | 123 | spin_unlock_irqrestore(&engine->hw_lock, flags); |
0daf0113 CW |
124 | } |
125 | ||
1fc44d9b | 126 | static void mock_context_unpin(struct intel_context *ce) |
0daf0113 | 127 | { |
5013eb8c | 128 | mock_timeline_unpin(ce->ring->timeline); |
1fc44d9b CW |
129 | i915_gem_context_put(ce->gem_context); |
130 | } | |
ab82a063 | 131 | |
1fc44d9b CW |
132 | static void mock_context_destroy(struct intel_context *ce) |
133 | { | |
134 | GEM_BUG_ON(ce->pin_count); | |
209760b7 CW |
135 | |
136 | if (ce->ring) | |
137 | mock_ring_free(ce->ring); | |
0daf0113 CW |
138 | } |
139 | ||
1fc44d9b CW |
140 | static const struct intel_context_ops mock_context_ops = { |
141 | .unpin = mock_context_unpin, | |
142 | .destroy = mock_context_destroy, | |
143 | }; | |
144 | ||
145 | static struct intel_context * | |
146 | mock_context_pin(struct intel_engine_cs *engine, | |
147 | struct i915_gem_context *ctx) | |
0daf0113 | 148 | { |
ab82a063 | 149 | struct intel_context *ce = to_intel_context(ctx, engine); |
5013eb8c | 150 | int err = -ENOMEM; |
ab82a063 | 151 | |
209760b7 CW |
152 | if (ce->pin_count++) |
153 | return ce; | |
154 | ||
155 | if (!ce->ring) { | |
156 | ce->ring = mock_ring(engine); | |
157 | if (!ce->ring) | |
158 | goto err; | |
1fc44d9b CW |
159 | } |
160 | ||
5013eb8c CW |
161 | mock_timeline_pin(ce->ring->timeline); |
162 | ||
209760b7 CW |
163 | ce->ops = &mock_context_ops; |
164 | i915_gem_context_get(ctx); | |
1fc44d9b | 165 | return ce; |
209760b7 CW |
166 | |
167 | err: | |
168 | ce->pin_count = 0; | |
5013eb8c | 169 | return ERR_PTR(err); |
0daf0113 CW |
170 | } |
171 | ||
e61e0f51 | 172 | static int mock_request_alloc(struct i915_request *request) |
0daf0113 CW |
173 | { |
174 | struct mock_request *mock = container_of(request, typeof(*mock), base); | |
175 | ||
176 | INIT_LIST_HEAD(&mock->link); | |
177 | mock->delay = 0; | |
178 | ||
0daf0113 CW |
179 | return 0; |
180 | } | |
181 | ||
e61e0f51 | 182 | static int mock_emit_flush(struct i915_request *request, |
0daf0113 CW |
183 | unsigned int flags) |
184 | { | |
185 | return 0; | |
186 | } | |
187 | ||
e1a73a54 | 188 | static u32 *mock_emit_breadcrumb(struct i915_request *request, u32 *cs) |
0daf0113 | 189 | { |
e1a73a54 | 190 | return cs; |
0daf0113 CW |
191 | } |
192 | ||
e61e0f51 | 193 | static void mock_submit_request(struct i915_request *request) |
0daf0113 CW |
194 | { |
195 | struct mock_request *mock = container_of(request, typeof(*mock), base); | |
196 | struct mock_engine *engine = | |
197 | container_of(request->engine, typeof(*engine), base); | |
52c0fdb2 | 198 | unsigned long flags; |
0daf0113 | 199 | |
e61e0f51 | 200 | i915_request_submit(request); |
0daf0113 CW |
201 | GEM_BUG_ON(!request->global_seqno); |
202 | ||
52c0fdb2 | 203 | spin_lock_irqsave(&engine->hw_lock, flags); |
0daf0113 | 204 | list_add_tail(&mock->link, &engine->hw_queue); |
b1f9107e CW |
205 | if (mock->link.prev == &engine->hw_queue) { |
206 | if (mock->delay) | |
207 | mod_timer(&engine->hw_delay, jiffies + mock->delay); | |
208 | else | |
1579ab2d | 209 | advance(mock); |
b1f9107e | 210 | } |
52c0fdb2 | 211 | spin_unlock_irqrestore(&engine->hw_lock, flags); |
0daf0113 CW |
212 | } |
213 | ||
0daf0113 | 214 | struct intel_engine_cs *mock_engine(struct drm_i915_private *i915, |
3ec0af7f CW |
215 | const char *name, |
216 | int id) | |
0daf0113 CW |
217 | { |
218 | struct mock_engine *engine; | |
3ec0af7f CW |
219 | |
220 | GEM_BUG_ON(id >= I915_NUM_ENGINES); | |
f97fbf96 CW |
221 | |
222 | engine = kzalloc(sizeof(*engine) + PAGE_SIZE, GFP_KERNEL); | |
223 | if (!engine) | |
224 | return NULL; | |
225 | ||
0daf0113 CW |
226 | /* minimal engine setup for requests */ |
227 | engine->base.i915 = i915; | |
6e516148 | 228 | snprintf(engine->base.name, sizeof(engine->base.name), "%s", name); |
3ec0af7f | 229 | engine->base.id = id; |
0ca88ba0 | 230 | engine->base.status_page.addr = (void *)(engine + 1); |
f97fbf96 | 231 | |
0daf0113 | 232 | engine->base.context_pin = mock_context_pin; |
0daf0113 CW |
233 | engine->base.request_alloc = mock_request_alloc; |
234 | engine->base.emit_flush = mock_emit_flush; | |
85474441 | 235 | engine->base.emit_fini_breadcrumb = mock_emit_breadcrumb; |
0daf0113 CW |
236 | engine->base.submit_request = mock_submit_request; |
237 | ||
52954edd CW |
238 | if (i915_timeline_init(i915, |
239 | &engine->base.timeline, | |
240 | engine->base.name, | |
241 | NULL)) | |
242 | goto err_free; | |
f911e723 | 243 | i915_timeline_set_subclass(&engine->base.timeline, TIMELINE_ENGINE); |
890fd185 | 244 | |
0daf0113 | 245 | intel_engine_init_breadcrumbs(&engine->base); |
0daf0113 CW |
246 | |
247 | /* fake hw queue */ | |
248 | spin_lock_init(&engine->hw_lock); | |
39cbf2aa | 249 | timer_setup(&engine->hw_delay, hw_delay_complete, 0); |
0daf0113 CW |
250 | INIT_LIST_HEAD(&engine->hw_queue); |
251 | ||
4a774ee3 | 252 | if (IS_ERR(intel_context_pin(i915->kernel_context, &engine->base))) |
209760b7 | 253 | goto err_breadcrumbs; |
4a774ee3 | 254 | |
0daf0113 | 255 | return &engine->base; |
b887d615 CW |
256 | |
257 | err_breadcrumbs: | |
258 | intel_engine_fini_breadcrumbs(&engine->base); | |
a89d1f92 | 259 | i915_timeline_fini(&engine->base.timeline); |
52954edd | 260 | err_free: |
b887d615 CW |
261 | kfree(engine); |
262 | return NULL; | |
f97fbf96 CW |
263 | } |
264 | ||
265 | void mock_engine_flush(struct intel_engine_cs *engine) | |
266 | { | |
0daf0113 CW |
267 | struct mock_engine *mock = |
268 | container_of(engine, typeof(*mock), base); | |
269 | struct mock_request *request, *rn; | |
270 | ||
271 | del_timer_sync(&mock->hw_delay); | |
272 | ||
273 | spin_lock_irq(&mock->hw_lock); | |
1579ab2d CW |
274 | list_for_each_entry_safe(request, rn, &mock->hw_queue, link) |
275 | advance(request); | |
0daf0113 | 276 | spin_unlock_irq(&mock->hw_lock); |
f97fbf96 CW |
277 | } |
278 | ||
279 | void mock_engine_reset(struct intel_engine_cs *engine) | |
280 | { | |
52c0fdb2 | 281 | intel_engine_write_global_seqno(engine, 0); |
f97fbf96 | 282 | } |
0daf0113 CW |
283 | |
284 | void mock_engine_free(struct intel_engine_cs *engine) | |
285 | { | |
286 | struct mock_engine *mock = | |
287 | container_of(engine, typeof(*mock), base); | |
1fc44d9b | 288 | struct intel_context *ce; |
0daf0113 CW |
289 | |
290 | GEM_BUG_ON(timer_pending(&mock->hw_delay)); | |
291 | ||
1fc44d9b CW |
292 | ce = fetch_and_zero(&engine->last_retired_context); |
293 | if (ce) | |
294 | intel_context_unpin(ce); | |
0daf0113 | 295 | |
4a774ee3 CW |
296 | __intel_context_unpin(engine->i915->kernel_context, engine); |
297 | ||
0daf0113 | 298 | intel_engine_fini_breadcrumbs(engine); |
a89d1f92 | 299 | i915_timeline_fini(&engine->timeline); |
0daf0113 | 300 | |
0daf0113 CW |
301 | kfree(engine); |
302 | } |