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 "gem/i915_gem_context.h" 26 27 #include "i915_drv.h" 28 #include "intel_context.h" 29 #include "intel_engine_pm.h" 30 31 #include "mock_engine.h" 32 #include "selftests/mock_request.h" 33 34 struct mock_ring { 35 struct intel_ring base; 36 struct i915_timeline timeline; 37 }; 38 39 static void mock_timeline_pin(struct i915_timeline *tl) 40 { 41 tl->pin_count++; 42 } 43 44 static void mock_timeline_unpin(struct i915_timeline *tl) 45 { 46 GEM_BUG_ON(!tl->pin_count); 47 tl->pin_count--; 48 } 49 50 static struct intel_ring *mock_ring(struct intel_engine_cs *engine) 51 { 52 const unsigned long sz = PAGE_SIZE / 2; 53 struct mock_ring *ring; 54 55 ring = kzalloc(sizeof(*ring) + sz, GFP_KERNEL); 56 if (!ring) 57 return NULL; 58 59 if (i915_timeline_init(engine->i915, &ring->timeline, NULL)) { 60 kfree(ring); 61 return NULL; 62 } 63 64 kref_init(&ring->base.ref); 65 ring->base.size = sz; 66 ring->base.effective_size = sz; 67 ring->base.vaddr = (void *)(ring + 1); 68 ring->base.timeline = &ring->timeline; 69 70 INIT_LIST_HEAD(&ring->base.request_list); 71 intel_ring_update_space(&ring->base); 72 73 return &ring->base; 74 } 75 76 static void mock_ring_free(struct intel_ring *base) 77 { 78 struct mock_ring *ring = container_of(base, typeof(*ring), base); 79 80 i915_timeline_fini(&ring->timeline); 81 kfree(ring); 82 } 83 84 static struct i915_request *first_request(struct mock_engine *engine) 85 { 86 return list_first_entry_or_null(&engine->hw_queue, 87 struct i915_request, 88 mock.link); 89 } 90 91 static void advance(struct i915_request *request) 92 { 93 list_del_init(&request->mock.link); 94 i915_request_mark_complete(request); 95 GEM_BUG_ON(!i915_request_completed(request)); 96 97 intel_engine_queue_breadcrumbs(request->engine); 98 } 99 100 static void hw_delay_complete(struct timer_list *t) 101 { 102 struct mock_engine *engine = from_timer(engine, t, hw_delay); 103 struct i915_request *request; 104 unsigned long flags; 105 106 spin_lock_irqsave(&engine->hw_lock, flags); 107 108 /* Timer fired, first request is complete */ 109 request = first_request(engine); 110 if (request) 111 advance(request); 112 113 /* 114 * Also immediately signal any subsequent 0-delay requests, but 115 * requeue the timer for the next delayed request. 116 */ 117 while ((request = first_request(engine))) { 118 if (request->mock.delay) { 119 mod_timer(&engine->hw_delay, 120 jiffies + request->mock.delay); 121 break; 122 } 123 124 advance(request); 125 } 126 127 spin_unlock_irqrestore(&engine->hw_lock, flags); 128 } 129 130 static void mock_context_unpin(struct intel_context *ce) 131 { 132 mock_timeline_unpin(ce->ring->timeline); 133 } 134 135 static void mock_context_destroy(struct kref *ref) 136 { 137 struct intel_context *ce = container_of(ref, typeof(*ce), ref); 138 139 GEM_BUG_ON(intel_context_is_pinned(ce)); 140 141 if (ce->ring) 142 mock_ring_free(ce->ring); 143 144 intel_context_free(ce); 145 } 146 147 static int mock_context_pin(struct intel_context *ce) 148 { 149 int ret; 150 151 if (!ce->ring) { 152 ce->ring = mock_ring(ce->engine); 153 if (!ce->ring) 154 return -ENOMEM; 155 } 156 157 ret = intel_context_active_acquire(ce, PIN_HIGH); 158 if (ret) 159 return ret; 160 161 mock_timeline_pin(ce->ring->timeline); 162 return 0; 163 } 164 165 static const struct intel_context_ops mock_context_ops = { 166 .pin = mock_context_pin, 167 .unpin = mock_context_unpin, 168 169 .enter = intel_context_enter_engine, 170 .exit = intel_context_exit_engine, 171 172 .destroy = mock_context_destroy, 173 }; 174 175 static int mock_request_alloc(struct i915_request *request) 176 { 177 INIT_LIST_HEAD(&request->mock.link); 178 request->mock.delay = 0; 179 180 return 0; 181 } 182 183 static int mock_emit_flush(struct i915_request *request, 184 unsigned int flags) 185 { 186 return 0; 187 } 188 189 static u32 *mock_emit_breadcrumb(struct i915_request *request, u32 *cs) 190 { 191 return cs; 192 } 193 194 static void mock_submit_request(struct i915_request *request) 195 { 196 struct mock_engine *engine = 197 container_of(request->engine, typeof(*engine), base); 198 unsigned long flags; 199 200 i915_request_submit(request); 201 202 spin_lock_irqsave(&engine->hw_lock, flags); 203 list_add_tail(&request->mock.link, &engine->hw_queue); 204 if (list_is_first(&request->mock.link, &engine->hw_queue)) { 205 if (request->mock.delay) 206 mod_timer(&engine->hw_delay, 207 jiffies + request->mock.delay); 208 else 209 advance(request); 210 } 211 spin_unlock_irqrestore(&engine->hw_lock, flags); 212 } 213 214 static void mock_reset_prepare(struct intel_engine_cs *engine) 215 { 216 } 217 218 static void mock_reset(struct intel_engine_cs *engine, bool stalled) 219 { 220 GEM_BUG_ON(stalled); 221 } 222 223 static void mock_reset_finish(struct intel_engine_cs *engine) 224 { 225 } 226 227 static void mock_cancel_requests(struct intel_engine_cs *engine) 228 { 229 struct i915_request *request; 230 unsigned long flags; 231 232 spin_lock_irqsave(&engine->active.lock, flags); 233 234 /* Mark all submitted requests as skipped. */ 235 list_for_each_entry(request, &engine->active.requests, sched.link) { 236 if (!i915_request_signaled(request)) 237 dma_fence_set_error(&request->fence, -EIO); 238 239 i915_request_mark_complete(request); 240 } 241 242 spin_unlock_irqrestore(&engine->active.lock, flags); 243 } 244 245 struct intel_engine_cs *mock_engine(struct drm_i915_private *i915, 246 const char *name, 247 int id) 248 { 249 struct mock_engine *engine; 250 251 GEM_BUG_ON(id >= I915_NUM_ENGINES); 252 253 engine = kzalloc(sizeof(*engine) + PAGE_SIZE, GFP_KERNEL); 254 if (!engine) 255 return NULL; 256 257 /* minimal engine setup for requests */ 258 engine->base.i915 = i915; 259 snprintf(engine->base.name, sizeof(engine->base.name), "%s", name); 260 engine->base.id = id; 261 engine->base.mask = BIT(id); 262 engine->base.status_page.addr = (void *)(engine + 1); 263 264 engine->base.cops = &mock_context_ops; 265 engine->base.request_alloc = mock_request_alloc; 266 engine->base.emit_flush = mock_emit_flush; 267 engine->base.emit_fini_breadcrumb = mock_emit_breadcrumb; 268 engine->base.submit_request = mock_submit_request; 269 270 engine->base.reset.prepare = mock_reset_prepare; 271 engine->base.reset.reset = mock_reset; 272 engine->base.reset.finish = mock_reset_finish; 273 engine->base.cancel_requests = mock_cancel_requests; 274 275 /* fake hw queue */ 276 spin_lock_init(&engine->hw_lock); 277 timer_setup(&engine->hw_delay, hw_delay_complete, 0); 278 INIT_LIST_HEAD(&engine->hw_queue); 279 280 return &engine->base; 281 } 282 283 int mock_engine_init(struct intel_engine_cs *engine) 284 { 285 struct drm_i915_private *i915 = engine->i915; 286 int err; 287 288 intel_engine_init_active(engine, ENGINE_MOCK); 289 intel_engine_init_breadcrumbs(engine); 290 intel_engine_init_execlists(engine); 291 intel_engine_init__pm(engine); 292 293 engine->kernel_context = 294 i915_gem_context_get_engine(i915->kernel_context, engine->id); 295 if (IS_ERR(engine->kernel_context)) 296 goto err_breadcrumbs; 297 298 err = intel_context_pin(engine->kernel_context); 299 intel_context_put(engine->kernel_context); 300 if (err) 301 goto err_breadcrumbs; 302 303 return 0; 304 305 err_breadcrumbs: 306 intel_engine_fini_breadcrumbs(engine); 307 return -ENOMEM; 308 } 309 310 void mock_engine_flush(struct intel_engine_cs *engine) 311 { 312 struct mock_engine *mock = 313 container_of(engine, typeof(*mock), base); 314 struct i915_request *request, *rn; 315 316 del_timer_sync(&mock->hw_delay); 317 318 spin_lock_irq(&mock->hw_lock); 319 list_for_each_entry_safe(request, rn, &mock->hw_queue, mock.link) 320 advance(request); 321 spin_unlock_irq(&mock->hw_lock); 322 } 323 324 void mock_engine_reset(struct intel_engine_cs *engine) 325 { 326 } 327 328 void mock_engine_free(struct intel_engine_cs *engine) 329 { 330 struct mock_engine *mock = 331 container_of(engine, typeof(*mock), base); 332 333 GEM_BUG_ON(timer_pending(&mock->hw_delay)); 334 335 intel_context_unpin(engine->kernel_context); 336 337 intel_engine_fini_breadcrumbs(engine); 338 339 kfree(engine); 340 } 341