Commit | Line | Data |
---|---|---|
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 | |
0daf0113 | 28 | static struct mock_request *first_request(struct mock_engine *engine) |
f97fbf96 | 29 | { |
0daf0113 CW |
30 | return list_first_entry_or_null(&engine->hw_queue, |
31 | struct mock_request, | |
32 | link); | |
33 | } | |
34 | ||
35 | static void hw_delay_complete(unsigned long data) | |
36 | { | |
37 | struct mock_engine *engine = (typeof(engine))data; | |
38 | struct mock_request *request; | |
39 | ||
40 | spin_lock(&engine->hw_lock); | |
41 | ||
42 | request = first_request(engine); | |
43 | if (request) { | |
44 | list_del_init(&request->link); | |
45 | mock_seqno_advance(&engine->base, request->base.global_seqno); | |
46 | } | |
47 | ||
48 | request = first_request(engine); | |
49 | if (request) | |
50 | mod_timer(&engine->hw_delay, jiffies + request->delay); | |
51 | ||
52 | spin_unlock(&engine->hw_lock); | |
53 | } | |
54 | ||
266a240b CW |
55 | static struct intel_ring * |
56 | mock_context_pin(struct intel_engine_cs *engine, | |
57 | struct i915_gem_context *ctx) | |
0daf0113 CW |
58 | { |
59 | i915_gem_context_get(ctx); | |
266a240b | 60 | return engine->buffer; |
0daf0113 CW |
61 | } |
62 | ||
63 | static void mock_context_unpin(struct intel_engine_cs *engine, | |
64 | struct i915_gem_context *ctx) | |
65 | { | |
66 | i915_gem_context_put(ctx); | |
67 | } | |
68 | ||
69 | static int mock_request_alloc(struct drm_i915_gem_request *request) | |
70 | { | |
71 | struct mock_request *mock = container_of(request, typeof(*mock), base); | |
72 | ||
73 | INIT_LIST_HEAD(&mock->link); | |
74 | mock->delay = 0; | |
75 | ||
0daf0113 CW |
76 | return 0; |
77 | } | |
78 | ||
79 | static int mock_emit_flush(struct drm_i915_gem_request *request, | |
80 | unsigned int flags) | |
81 | { | |
82 | return 0; | |
83 | } | |
84 | ||
85 | static void mock_emit_breadcrumb(struct drm_i915_gem_request *request, | |
86 | u32 *flags) | |
87 | { | |
88 | } | |
89 | ||
90 | static void mock_submit_request(struct drm_i915_gem_request *request) | |
91 | { | |
92 | struct mock_request *mock = container_of(request, typeof(*mock), base); | |
93 | struct mock_engine *engine = | |
94 | container_of(request->engine, typeof(*engine), base); | |
95 | ||
96 | i915_gem_request_submit(request); | |
97 | GEM_BUG_ON(!request->global_seqno); | |
98 | ||
99 | spin_lock_irq(&engine->hw_lock); | |
100 | list_add_tail(&mock->link, &engine->hw_queue); | |
101 | if (mock->link.prev == &engine->hw_queue) | |
102 | mod_timer(&engine->hw_delay, jiffies + mock->delay); | |
103 | spin_unlock_irq(&engine->hw_lock); | |
104 | } | |
105 | ||
106 | static struct intel_ring *mock_ring(struct intel_engine_cs *engine) | |
107 | { | |
108 | const unsigned long sz = roundup_pow_of_two(sizeof(struct intel_ring)); | |
109 | struct intel_ring *ring; | |
110 | ||
111 | ring = kzalloc(sizeof(*ring) + sz, GFP_KERNEL); | |
112 | if (!ring) | |
113 | return NULL; | |
114 | ||
0daf0113 CW |
115 | ring->size = sz; |
116 | ring->effective_size = sz; | |
117 | ring->vaddr = (void *)(ring + 1); | |
118 | ||
119 | INIT_LIST_HEAD(&ring->request_list); | |
0daf0113 CW |
120 | intel_ring_update_space(ring); |
121 | ||
122 | return ring; | |
123 | } | |
124 | ||
125 | struct intel_engine_cs *mock_engine(struct drm_i915_private *i915, | |
3ec0af7f CW |
126 | const char *name, |
127 | int id) | |
0daf0113 CW |
128 | { |
129 | struct mock_engine *engine; | |
3ec0af7f CW |
130 | |
131 | GEM_BUG_ON(id >= I915_NUM_ENGINES); | |
f97fbf96 CW |
132 | |
133 | engine = kzalloc(sizeof(*engine) + PAGE_SIZE, GFP_KERNEL); | |
134 | if (!engine) | |
135 | return NULL; | |
136 | ||
0daf0113 CW |
137 | engine->base.buffer = mock_ring(&engine->base); |
138 | if (!engine->base.buffer) { | |
139 | kfree(engine); | |
140 | return NULL; | |
141 | } | |
f97fbf96 | 142 | |
0daf0113 CW |
143 | /* minimal engine setup for requests */ |
144 | engine->base.i915 = i915; | |
6e516148 | 145 | snprintf(engine->base.name, sizeof(engine->base.name), "%s", name); |
3ec0af7f | 146 | engine->base.id = id; |
0daf0113 | 147 | engine->base.status_page.page_addr = (void *)(engine + 1); |
f97fbf96 | 148 | |
0daf0113 CW |
149 | engine->base.context_pin = mock_context_pin; |
150 | engine->base.context_unpin = mock_context_unpin; | |
151 | engine->base.request_alloc = mock_request_alloc; | |
152 | engine->base.emit_flush = mock_emit_flush; | |
153 | engine->base.emit_breadcrumb = mock_emit_breadcrumb; | |
154 | engine->base.submit_request = mock_submit_request; | |
155 | ||
156 | engine->base.timeline = | |
157 | &i915->gt.global_timeline.engine[engine->base.id]; | |
158 | ||
159 | intel_engine_init_breadcrumbs(&engine->base); | |
160 | engine->base.breadcrumbs.mock = true; /* prevent touching HW for irqs */ | |
161 | ||
162 | /* fake hw queue */ | |
163 | spin_lock_init(&engine->hw_lock); | |
164 | setup_timer(&engine->hw_delay, | |
165 | hw_delay_complete, | |
166 | (unsigned long)engine); | |
167 | INIT_LIST_HEAD(&engine->hw_queue); | |
168 | ||
169 | return &engine->base; | |
f97fbf96 CW |
170 | } |
171 | ||
172 | void mock_engine_flush(struct intel_engine_cs *engine) | |
173 | { | |
0daf0113 CW |
174 | struct mock_engine *mock = |
175 | container_of(engine, typeof(*mock), base); | |
176 | struct mock_request *request, *rn; | |
177 | ||
178 | del_timer_sync(&mock->hw_delay); | |
179 | ||
180 | spin_lock_irq(&mock->hw_lock); | |
181 | list_for_each_entry_safe(request, rn, &mock->hw_queue, link) { | |
182 | list_del_init(&request->link); | |
183 | mock_seqno_advance(&mock->base, request->base.global_seqno); | |
184 | } | |
185 | spin_unlock_irq(&mock->hw_lock); | |
f97fbf96 CW |
186 | } |
187 | ||
188 | void mock_engine_reset(struct intel_engine_cs *engine) | |
189 | { | |
190 | intel_write_status_page(engine, I915_GEM_HWS_INDEX, 0); | |
191 | } | |
0daf0113 CW |
192 | |
193 | void mock_engine_free(struct intel_engine_cs *engine) | |
194 | { | |
195 | struct mock_engine *mock = | |
196 | container_of(engine, typeof(*mock), base); | |
197 | ||
198 | GEM_BUG_ON(timer_pending(&mock->hw_delay)); | |
199 | ||
200 | if (engine->last_retired_context) | |
201 | engine->context_unpin(engine, engine->last_retired_context); | |
202 | ||
203 | intel_engine_fini_breadcrumbs(engine); | |
204 | ||
205 | kfree(engine->buffer); | |
206 | kfree(engine); | |
207 | } |