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 #include "gt/intel_ring.h" 27 28 #include "i915_drv.h" 29 #include "intel_context.h" 30 #include "intel_engine_pm.h" 31 32 #include "mock_engine.h" 33 #include "selftests/mock_request.h" 34 35 static void mock_timeline_pin(struct intel_timeline *tl) 36 { 37 atomic_inc(&tl->pin_count); 38 } 39 40 static void mock_timeline_unpin(struct intel_timeline *tl) 41 { 42 GEM_BUG_ON(!atomic_read(&tl->pin_count)); 43 atomic_dec(&tl->pin_count); 44 } 45 46 static struct intel_ring *mock_ring(struct intel_engine_cs *engine) 47 { 48 const unsigned long sz = PAGE_SIZE / 2; 49 struct intel_ring *ring; 50 51 ring = kzalloc(sizeof(*ring) + sz, GFP_KERNEL); 52 if (!ring) 53 return NULL; 54 55 kref_init(&ring->ref); 56 ring->size = sz; 57 ring->effective_size = sz; 58 ring->vaddr = (void *)(ring + 1); 59 atomic_set(&ring->pin_count, 1); 60 61 ring->vma = i915_vma_alloc(); 62 if (!ring->vma) { 63 kfree(ring); 64 return NULL; 65 } 66 i915_active_init(&ring->vma->active, NULL, NULL); 67 __set_bit(I915_VMA_GGTT_BIT, __i915_vma_flags(ring->vma)); 68 __set_bit(DRM_MM_NODE_ALLOCATED_BIT, &ring->vma->node.flags); 69 ring->vma->node.size = sz; 70 71 intel_ring_update_space(ring); 72 73 return ring; 74 } 75 76 static void mock_ring_free(struct intel_ring *ring) 77 { 78 i915_active_fini(&ring->vma->active); 79 i915_vma_free(ring->vma); 80 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_signal_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 } 133 134 static void mock_context_post_unpin(struct intel_context *ce) 135 { 136 } 137 138 static void mock_context_destroy(struct kref *ref) 139 { 140 struct intel_context *ce = container_of(ref, typeof(*ce), ref); 141 142 GEM_BUG_ON(intel_context_is_pinned(ce)); 143 144 if (test_bit(CONTEXT_ALLOC_BIT, &ce->flags)) { 145 mock_ring_free(ce->ring); 146 mock_timeline_unpin(ce->timeline); 147 } 148 149 intel_context_fini(ce); 150 intel_context_free(ce); 151 } 152 153 static int mock_context_alloc(struct intel_context *ce) 154 { 155 ce->ring = mock_ring(ce->engine); 156 if (!ce->ring) 157 return -ENOMEM; 158 159 ce->timeline = intel_timeline_create(ce->engine->gt); 160 if (IS_ERR(ce->timeline)) { 161 kfree(ce->engine); 162 return PTR_ERR(ce->timeline); 163 } 164 165 mock_timeline_pin(ce->timeline); 166 167 return 0; 168 } 169 170 static int mock_context_pre_pin(struct intel_context *ce, 171 struct i915_gem_ww_ctx *ww, void **unused) 172 { 173 return 0; 174 } 175 176 static int mock_context_pin(struct intel_context *ce, void *unused) 177 { 178 return 0; 179 } 180 181 static void mock_context_reset(struct intel_context *ce) 182 { 183 } 184 185 static const struct intel_context_ops mock_context_ops = { 186 .alloc = mock_context_alloc, 187 188 .pre_pin = mock_context_pre_pin, 189 .pin = mock_context_pin, 190 .unpin = mock_context_unpin, 191 .post_unpin = mock_context_post_unpin, 192 193 .enter = intel_context_enter_engine, 194 .exit = intel_context_exit_engine, 195 196 .reset = mock_context_reset, 197 .destroy = mock_context_destroy, 198 }; 199 200 static int mock_request_alloc(struct i915_request *request) 201 { 202 INIT_LIST_HEAD(&request->mock.link); 203 request->mock.delay = 0; 204 205 return 0; 206 } 207 208 static int mock_emit_flush(struct i915_request *request, 209 unsigned int flags) 210 { 211 return 0; 212 } 213 214 static u32 *mock_emit_breadcrumb(struct i915_request *request, u32 *cs) 215 { 216 return cs; 217 } 218 219 static void mock_submit_request(struct i915_request *request) 220 { 221 struct mock_engine *engine = 222 container_of(request->engine, typeof(*engine), base); 223 unsigned long flags; 224 225 i915_request_submit(request); 226 227 spin_lock_irqsave(&engine->hw_lock, flags); 228 list_add_tail(&request->mock.link, &engine->hw_queue); 229 if (list_is_first(&request->mock.link, &engine->hw_queue)) { 230 if (request->mock.delay) 231 mod_timer(&engine->hw_delay, 232 jiffies + request->mock.delay); 233 else 234 advance(request); 235 } 236 spin_unlock_irqrestore(&engine->hw_lock, flags); 237 } 238 239 static void mock_reset_prepare(struct intel_engine_cs *engine) 240 { 241 } 242 243 static void mock_reset_rewind(struct intel_engine_cs *engine, bool stalled) 244 { 245 GEM_BUG_ON(stalled); 246 } 247 248 static void mock_reset_cancel(struct intel_engine_cs *engine) 249 { 250 struct mock_engine *mock = 251 container_of(engine, typeof(*mock), base); 252 struct i915_request *rq; 253 unsigned long flags; 254 255 del_timer_sync(&mock->hw_delay); 256 257 spin_lock_irqsave(&engine->active.lock, flags); 258 259 /* Mark all submitted requests as skipped. */ 260 list_for_each_entry(rq, &engine->active.requests, sched.link) 261 i915_request_mark_eio(rq); 262 intel_engine_signal_breadcrumbs(engine); 263 264 /* Cancel and submit all pending requests. */ 265 list_for_each_entry(rq, &mock->hw_queue, mock.link) { 266 i915_request_mark_eio(rq); 267 __i915_request_submit(rq); 268 } 269 INIT_LIST_HEAD(&mock->hw_queue); 270 271 spin_unlock_irqrestore(&engine->active.lock, flags); 272 } 273 274 static void mock_reset_finish(struct intel_engine_cs *engine) 275 { 276 } 277 278 static void mock_engine_release(struct intel_engine_cs *engine) 279 { 280 struct mock_engine *mock = 281 container_of(engine, typeof(*mock), base); 282 283 GEM_BUG_ON(timer_pending(&mock->hw_delay)); 284 285 intel_breadcrumbs_free(engine->breadcrumbs); 286 287 intel_context_unpin(engine->kernel_context); 288 intel_context_put(engine->kernel_context); 289 290 intel_engine_fini_retire(engine); 291 } 292 293 struct intel_engine_cs *mock_engine(struct drm_i915_private *i915, 294 const char *name, 295 int id) 296 { 297 struct mock_engine *engine; 298 299 GEM_BUG_ON(id >= I915_NUM_ENGINES); 300 GEM_BUG_ON(!i915->gt.uncore); 301 302 engine = kzalloc(sizeof(*engine) + PAGE_SIZE, GFP_KERNEL); 303 if (!engine) 304 return NULL; 305 306 /* minimal engine setup for requests */ 307 engine->base.i915 = i915; 308 engine->base.gt = &i915->gt; 309 engine->base.uncore = i915->gt.uncore; 310 snprintf(engine->base.name, sizeof(engine->base.name), "%s", name); 311 engine->base.id = id; 312 engine->base.mask = BIT(id); 313 engine->base.legacy_idx = INVALID_ENGINE; 314 engine->base.instance = id; 315 engine->base.status_page.addr = (void *)(engine + 1); 316 317 engine->base.cops = &mock_context_ops; 318 engine->base.request_alloc = mock_request_alloc; 319 engine->base.emit_flush = mock_emit_flush; 320 engine->base.emit_fini_breadcrumb = mock_emit_breadcrumb; 321 engine->base.submit_request = mock_submit_request; 322 323 engine->base.reset.prepare = mock_reset_prepare; 324 engine->base.reset.rewind = mock_reset_rewind; 325 engine->base.reset.cancel = mock_reset_cancel; 326 engine->base.reset.finish = mock_reset_finish; 327 328 engine->base.release = mock_engine_release; 329 330 i915->gt.engine[id] = &engine->base; 331 i915->gt.engine_class[0][id] = &engine->base; 332 333 /* fake hw queue */ 334 spin_lock_init(&engine->hw_lock); 335 timer_setup(&engine->hw_delay, hw_delay_complete, 0); 336 INIT_LIST_HEAD(&engine->hw_queue); 337 338 intel_engine_add_user(&engine->base); 339 340 return &engine->base; 341 } 342 343 int mock_engine_init(struct intel_engine_cs *engine) 344 { 345 struct intel_context *ce; 346 347 intel_engine_init_active(engine, ENGINE_MOCK); 348 intel_engine_init_execlists(engine); 349 intel_engine_init__pm(engine); 350 intel_engine_init_retire(engine); 351 352 engine->breadcrumbs = intel_breadcrumbs_create(NULL); 353 if (!engine->breadcrumbs) 354 return -ENOMEM; 355 356 ce = create_kernel_context(engine); 357 if (IS_ERR(ce)) 358 goto err_breadcrumbs; 359 360 /* We insist the kernel context is using the status_page */ 361 engine->status_page.vma = ce->timeline->hwsp_ggtt; 362 363 engine->kernel_context = ce; 364 return 0; 365 366 err_breadcrumbs: 367 intel_breadcrumbs_free(engine->breadcrumbs); 368 return -ENOMEM; 369 } 370 371 void mock_engine_flush(struct intel_engine_cs *engine) 372 { 373 struct mock_engine *mock = 374 container_of(engine, typeof(*mock), base); 375 struct i915_request *request, *rn; 376 377 del_timer_sync(&mock->hw_delay); 378 379 spin_lock_irq(&mock->hw_lock); 380 list_for_each_entry_safe(request, rn, &mock->hw_queue, mock.link) 381 advance(request); 382 spin_unlock_irq(&mock->hw_lock); 383 } 384 385 void mock_engine_reset(struct intel_engine_cs *engine) 386 { 387 } 388