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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 | ||
0daf0113 | 33 | static struct mock_request *first_request(struct mock_engine *engine) |
f97fbf96 | 34 | { |
0daf0113 CW |
35 | return list_first_entry_or_null(&engine->hw_queue, |
36 | struct mock_request, | |
37 | link); | |
38 | } | |
39 | ||
b1f9107e CW |
40 | static void advance(struct mock_engine *engine, |
41 | struct mock_request *request) | |
42 | { | |
43 | list_del_init(&request->link); | |
44 | mock_seqno_advance(&engine->base, request->base.global_seqno); | |
45 | } | |
46 | ||
39cbf2aa | 47 | static void hw_delay_complete(struct timer_list *t) |
0daf0113 | 48 | { |
39cbf2aa | 49 | struct mock_engine *engine = from_timer(engine, t, hw_delay); |
0daf0113 CW |
50 | struct mock_request *request; |
51 | ||
52 | spin_lock(&engine->hw_lock); | |
53 | ||
b1f9107e | 54 | /* Timer fired, first request is complete */ |
0daf0113 CW |
55 | request = first_request(engine); |
56 | if (request) | |
b1f9107e CW |
57 | advance(engine, request); |
58 | ||
59 | /* | |
60 | * Also immediately signal any subsequent 0-delay requests, but | |
61 | * requeue the timer for the next delayed request. | |
62 | */ | |
63 | while ((request = first_request(engine))) { | |
64 | if (request->delay) { | |
65 | mod_timer(&engine->hw_delay, jiffies + request->delay); | |
66 | break; | |
67 | } | |
68 | ||
69 | advance(engine, request); | |
70 | } | |
0daf0113 CW |
71 | |
72 | spin_unlock(&engine->hw_lock); | |
73 | } | |
74 | ||
1fc44d9b | 75 | static void mock_context_unpin(struct intel_context *ce) |
0daf0113 | 76 | { |
1fc44d9b CW |
77 | i915_gem_context_put(ce->gem_context); |
78 | } | |
ab82a063 | 79 | |
1fc44d9b CW |
80 | static void mock_context_destroy(struct intel_context *ce) |
81 | { | |
82 | GEM_BUG_ON(ce->pin_count); | |
0daf0113 CW |
83 | } |
84 | ||
1fc44d9b CW |
85 | static const struct intel_context_ops mock_context_ops = { |
86 | .unpin = mock_context_unpin, | |
87 | .destroy = mock_context_destroy, | |
88 | }; | |
89 | ||
90 | static struct intel_context * | |
91 | mock_context_pin(struct intel_engine_cs *engine, | |
92 | struct i915_gem_context *ctx) | |
0daf0113 | 93 | { |
ab82a063 CW |
94 | struct intel_context *ce = to_intel_context(ctx, engine); |
95 | ||
1fc44d9b CW |
96 | if (!ce->pin_count++) { |
97 | i915_gem_context_get(ctx); | |
98 | ce->ring = engine->buffer; | |
99 | ce->ops = &mock_context_ops; | |
100 | } | |
101 | ||
102 | return ce; | |
0daf0113 CW |
103 | } |
104 | ||
e61e0f51 | 105 | static int mock_request_alloc(struct i915_request *request) |
0daf0113 CW |
106 | { |
107 | struct mock_request *mock = container_of(request, typeof(*mock), base); | |
108 | ||
109 | INIT_LIST_HEAD(&mock->link); | |
110 | mock->delay = 0; | |
111 | ||
0daf0113 CW |
112 | return 0; |
113 | } | |
114 | ||
e61e0f51 | 115 | static int mock_emit_flush(struct i915_request *request, |
0daf0113 CW |
116 | unsigned int flags) |
117 | { | |
118 | return 0; | |
119 | } | |
120 | ||
e61e0f51 | 121 | static void mock_emit_breadcrumb(struct i915_request *request, |
0daf0113 CW |
122 | u32 *flags) |
123 | { | |
124 | } | |
125 | ||
e61e0f51 | 126 | static void mock_submit_request(struct i915_request *request) |
0daf0113 CW |
127 | { |
128 | struct mock_request *mock = container_of(request, typeof(*mock), base); | |
129 | struct mock_engine *engine = | |
130 | container_of(request->engine, typeof(*engine), base); | |
131 | ||
e61e0f51 | 132 | i915_request_submit(request); |
0daf0113 CW |
133 | GEM_BUG_ON(!request->global_seqno); |
134 | ||
135 | spin_lock_irq(&engine->hw_lock); | |
136 | list_add_tail(&mock->link, &engine->hw_queue); | |
b1f9107e CW |
137 | if (mock->link.prev == &engine->hw_queue) { |
138 | if (mock->delay) | |
139 | mod_timer(&engine->hw_delay, jiffies + mock->delay); | |
140 | else | |
141 | advance(engine, mock); | |
142 | } | |
0daf0113 CW |
143 | spin_unlock_irq(&engine->hw_lock); |
144 | } | |
145 | ||
146 | static struct intel_ring *mock_ring(struct intel_engine_cs *engine) | |
147 | { | |
24fd018a | 148 | const unsigned long sz = PAGE_SIZE / 2; |
a89d1f92 | 149 | struct mock_ring *ring; |
0daf0113 | 150 | |
24fd018a CW |
151 | BUILD_BUG_ON(MIN_SPACE_FOR_ADD_REQUEST > sz); |
152 | ||
0daf0113 CW |
153 | ring = kzalloc(sizeof(*ring) + sz, GFP_KERNEL); |
154 | if (!ring) | |
155 | return NULL; | |
156 | ||
a89d1f92 | 157 | i915_timeline_init(engine->i915, &ring->timeline, engine->name); |
65fcb806 | 158 | |
a89d1f92 CW |
159 | ring->base.size = sz; |
160 | ring->base.effective_size = sz; | |
161 | ring->base.vaddr = (void *)(ring + 1); | |
162 | ring->base.timeline = &ring->timeline; | |
0daf0113 | 163 | |
a89d1f92 CW |
164 | INIT_LIST_HEAD(&ring->base.request_list); |
165 | intel_ring_update_space(&ring->base); | |
0daf0113 | 166 | |
a89d1f92 | 167 | return &ring->base; |
0daf0113 CW |
168 | } |
169 | ||
a89d1f92 | 170 | static void mock_ring_free(struct intel_ring *base) |
b887d615 | 171 | { |
a89d1f92 CW |
172 | struct mock_ring *ring = container_of(base, typeof(*ring), base); |
173 | ||
174 | i915_timeline_fini(&ring->timeline); | |
b887d615 CW |
175 | kfree(ring); |
176 | } | |
177 | ||
0daf0113 | 178 | struct intel_engine_cs *mock_engine(struct drm_i915_private *i915, |
3ec0af7f CW |
179 | const char *name, |
180 | int id) | |
0daf0113 CW |
181 | { |
182 | struct mock_engine *engine; | |
3ec0af7f CW |
183 | |
184 | GEM_BUG_ON(id >= I915_NUM_ENGINES); | |
f97fbf96 CW |
185 | |
186 | engine = kzalloc(sizeof(*engine) + PAGE_SIZE, GFP_KERNEL); | |
187 | if (!engine) | |
188 | return NULL; | |
189 | ||
0daf0113 CW |
190 | /* minimal engine setup for requests */ |
191 | engine->base.i915 = i915; | |
6e516148 | 192 | snprintf(engine->base.name, sizeof(engine->base.name), "%s", name); |
3ec0af7f | 193 | engine->base.id = id; |
0daf0113 | 194 | engine->base.status_page.page_addr = (void *)(engine + 1); |
f97fbf96 | 195 | |
0daf0113 | 196 | engine->base.context_pin = mock_context_pin; |
0daf0113 CW |
197 | engine->base.request_alloc = mock_request_alloc; |
198 | engine->base.emit_flush = mock_emit_flush; | |
199 | engine->base.emit_breadcrumb = mock_emit_breadcrumb; | |
200 | engine->base.submit_request = mock_submit_request; | |
201 | ||
a89d1f92 | 202 | i915_timeline_init(i915, &engine->base.timeline, engine->base.name); |
f911e723 | 203 | i915_timeline_set_subclass(&engine->base.timeline, TIMELINE_ENGINE); |
890fd185 | 204 | |
0daf0113 CW |
205 | intel_engine_init_breadcrumbs(&engine->base); |
206 | engine->base.breadcrumbs.mock = true; /* prevent touching HW for irqs */ | |
207 | ||
208 | /* fake hw queue */ | |
209 | spin_lock_init(&engine->hw_lock); | |
39cbf2aa | 210 | timer_setup(&engine->hw_delay, hw_delay_complete, 0); |
0daf0113 CW |
211 | INIT_LIST_HEAD(&engine->hw_queue); |
212 | ||
b887d615 CW |
213 | engine->base.buffer = mock_ring(&engine->base); |
214 | if (!engine->base.buffer) | |
215 | goto err_breadcrumbs; | |
216 | ||
4a774ee3 CW |
217 | if (IS_ERR(intel_context_pin(i915->kernel_context, &engine->base))) |
218 | goto err_ring; | |
219 | ||
0daf0113 | 220 | return &engine->base; |
b887d615 | 221 | |
4a774ee3 CW |
222 | err_ring: |
223 | mock_ring_free(engine->base.buffer); | |
b887d615 CW |
224 | err_breadcrumbs: |
225 | intel_engine_fini_breadcrumbs(&engine->base); | |
a89d1f92 | 226 | i915_timeline_fini(&engine->base.timeline); |
b887d615 CW |
227 | kfree(engine); |
228 | return NULL; | |
f97fbf96 CW |
229 | } |
230 | ||
231 | void mock_engine_flush(struct intel_engine_cs *engine) | |
232 | { | |
0daf0113 CW |
233 | struct mock_engine *mock = |
234 | container_of(engine, typeof(*mock), base); | |
235 | struct mock_request *request, *rn; | |
236 | ||
237 | del_timer_sync(&mock->hw_delay); | |
238 | ||
239 | spin_lock_irq(&mock->hw_lock); | |
240 | list_for_each_entry_safe(request, rn, &mock->hw_queue, link) { | |
241 | list_del_init(&request->link); | |
242 | mock_seqno_advance(&mock->base, request->base.global_seqno); | |
243 | } | |
244 | spin_unlock_irq(&mock->hw_lock); | |
f97fbf96 CW |
245 | } |
246 | ||
247 | void mock_engine_reset(struct intel_engine_cs *engine) | |
248 | { | |
249 | intel_write_status_page(engine, I915_GEM_HWS_INDEX, 0); | |
250 | } | |
0daf0113 CW |
251 | |
252 | void mock_engine_free(struct intel_engine_cs *engine) | |
253 | { | |
254 | struct mock_engine *mock = | |
255 | container_of(engine, typeof(*mock), base); | |
1fc44d9b | 256 | struct intel_context *ce; |
0daf0113 CW |
257 | |
258 | GEM_BUG_ON(timer_pending(&mock->hw_delay)); | |
259 | ||
1fc44d9b CW |
260 | ce = fetch_and_zero(&engine->last_retired_context); |
261 | if (ce) | |
262 | intel_context_unpin(ce); | |
0daf0113 | 263 | |
4a774ee3 CW |
264 | __intel_context_unpin(engine->i915->kernel_context, engine); |
265 | ||
b887d615 CW |
266 | mock_ring_free(engine->buffer); |
267 | ||
0daf0113 | 268 | intel_engine_fini_breadcrumbs(engine); |
a89d1f92 | 269 | i915_timeline_fini(&engine->timeline); |
0daf0113 | 270 | |
0daf0113 CW |
271 | kfree(engine); |
272 | } |