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 <linux/prime_numbers.h>
26
27 #include "../i915_selftest.h"
28
29 #include "mock_context.h"
30 #include "mock_gem_device.h"
31
igt_add_request(void * arg)32 static int igt_add_request(void *arg)
33 {
34 struct drm_i915_private *i915 = arg;
35 struct drm_i915_gem_request *request;
36 int err = -ENOMEM;
37
38 /* Basic preliminary test to create a request and let it loose! */
39
40 mutex_lock(&i915->drm.struct_mutex);
41 request = mock_request(i915->engine[RCS],
42 i915->kernel_context,
43 HZ / 10);
44 if (!request)
45 goto out_unlock;
46
47 i915_add_request(request);
48
49 err = 0;
50 out_unlock:
51 mutex_unlock(&i915->drm.struct_mutex);
52 return err;
53 }
54
igt_wait_request(void * arg)55 static int igt_wait_request(void *arg)
56 {
57 const long T = HZ / 4;
58 struct drm_i915_private *i915 = arg;
59 struct drm_i915_gem_request *request;
60 int err = -EINVAL;
61
62 /* Submit a request, then wait upon it */
63
64 mutex_lock(&i915->drm.struct_mutex);
65 request = mock_request(i915->engine[RCS], i915->kernel_context, T);
66 if (!request) {
67 err = -ENOMEM;
68 goto out_unlock;
69 }
70
71 if (i915_wait_request(request, I915_WAIT_LOCKED, 0) != -ETIME) {
72 pr_err("request wait (busy query) succeeded (expected timeout before submit!)\n");
73 goto out_unlock;
74 }
75
76 if (i915_wait_request(request, I915_WAIT_LOCKED, T) != -ETIME) {
77 pr_err("request wait succeeded (expected timeout before submit!)\n");
78 goto out_unlock;
79 }
80
81 if (i915_gem_request_completed(request)) {
82 pr_err("request completed before submit!!\n");
83 goto out_unlock;
84 }
85
86 i915_add_request(request);
87
88 if (i915_wait_request(request, I915_WAIT_LOCKED, 0) != -ETIME) {
89 pr_err("request wait (busy query) succeeded (expected timeout after submit!)\n");
90 goto out_unlock;
91 }
92
93 if (i915_gem_request_completed(request)) {
94 pr_err("request completed immediately!\n");
95 goto out_unlock;
96 }
97
98 if (i915_wait_request(request, I915_WAIT_LOCKED, T / 2) != -ETIME) {
99 pr_err("request wait succeeded (expected timeout!)\n");
100 goto out_unlock;
101 }
102
103 if (i915_wait_request(request, I915_WAIT_LOCKED, T) == -ETIME) {
104 pr_err("request wait timed out!\n");
105 goto out_unlock;
106 }
107
108 if (!i915_gem_request_completed(request)) {
109 pr_err("request not complete after waiting!\n");
110 goto out_unlock;
111 }
112
113 if (i915_wait_request(request, I915_WAIT_LOCKED, T) == -ETIME) {
114 pr_err("request wait timed out when already complete!\n");
115 goto out_unlock;
116 }
117
118 err = 0;
119 out_unlock:
120 mock_device_flush(i915);
121 mutex_unlock(&i915->drm.struct_mutex);
122 return err;
123 }
124
igt_fence_wait(void * arg)125 static int igt_fence_wait(void *arg)
126 {
127 const long T = HZ / 4;
128 struct drm_i915_private *i915 = arg;
129 struct drm_i915_gem_request *request;
130 int err = -EINVAL;
131
132 /* Submit a request, treat it as a fence and wait upon it */
133
134 mutex_lock(&i915->drm.struct_mutex);
135 request = mock_request(i915->engine[RCS], i915->kernel_context, T);
136 if (!request) {
137 err = -ENOMEM;
138 goto out_locked;
139 }
140 mutex_unlock(&i915->drm.struct_mutex); /* safe as we are single user */
141
142 if (dma_fence_wait_timeout(&request->fence, false, T) != -ETIME) {
143 pr_err("fence wait success before submit (expected timeout)!\n");
144 goto out_device;
145 }
146
147 mutex_lock(&i915->drm.struct_mutex);
148 i915_add_request(request);
149 mutex_unlock(&i915->drm.struct_mutex);
150
151 if (dma_fence_is_signaled(&request->fence)) {
152 pr_err("fence signaled immediately!\n");
153 goto out_device;
154 }
155
156 if (dma_fence_wait_timeout(&request->fence, false, T / 2) != -ETIME) {
157 pr_err("fence wait success after submit (expected timeout)!\n");
158 goto out_device;
159 }
160
161 if (dma_fence_wait_timeout(&request->fence, false, T) <= 0) {
162 pr_err("fence wait timed out (expected success)!\n");
163 goto out_device;
164 }
165
166 if (!dma_fence_is_signaled(&request->fence)) {
167 pr_err("fence unsignaled after waiting!\n");
168 goto out_device;
169 }
170
171 if (dma_fence_wait_timeout(&request->fence, false, T) <= 0) {
172 pr_err("fence wait timed out when complete (expected success)!\n");
173 goto out_device;
174 }
175
176 err = 0;
177 out_device:
178 mutex_lock(&i915->drm.struct_mutex);
179 out_locked:
180 mock_device_flush(i915);
181 mutex_unlock(&i915->drm.struct_mutex);
182 return err;
183 }
184
igt_request_rewind(void * arg)185 static int igt_request_rewind(void *arg)
186 {
187 struct drm_i915_private *i915 = arg;
188 struct drm_i915_gem_request *request, *vip;
189 struct i915_gem_context *ctx[2];
190 int err = -EINVAL;
191
192 mutex_lock(&i915->drm.struct_mutex);
193 ctx[0] = mock_context(i915, "A");
194 request = mock_request(i915->engine[RCS], ctx[0], 2 * HZ);
195 if (!request) {
196 err = -ENOMEM;
197 goto err_context_0;
198 }
199
200 i915_gem_request_get(request);
201 i915_add_request(request);
202
203 ctx[1] = mock_context(i915, "B");
204 vip = mock_request(i915->engine[RCS], ctx[1], 0);
205 if (!vip) {
206 err = -ENOMEM;
207 goto err_context_1;
208 }
209
210 /* Simulate preemption by manual reordering */
211 if (!mock_cancel_request(request)) {
212 pr_err("failed to cancel request (already executed)!\n");
213 i915_add_request(vip);
214 goto err_context_1;
215 }
216 i915_gem_request_get(vip);
217 i915_add_request(vip);
218 request->engine->submit_request(request);
219
220 mutex_unlock(&i915->drm.struct_mutex);
221
222 if (i915_wait_request(vip, 0, HZ) == -ETIME) {
223 pr_err("timed out waiting for high priority request, vip.seqno=%d, current seqno=%d\n",
224 vip->global_seqno, intel_engine_get_seqno(i915->engine[RCS]));
225 goto err;
226 }
227
228 if (i915_gem_request_completed(request)) {
229 pr_err("low priority request already completed\n");
230 goto err;
231 }
232
233 err = 0;
234 err:
235 i915_gem_request_put(vip);
236 mutex_lock(&i915->drm.struct_mutex);
237 err_context_1:
238 mock_context_close(ctx[1]);
239 i915_gem_request_put(request);
240 err_context_0:
241 mock_context_close(ctx[0]);
242 mock_device_flush(i915);
243 mutex_unlock(&i915->drm.struct_mutex);
244 return err;
245 }
246
i915_gem_request_mock_selftests(void)247 int i915_gem_request_mock_selftests(void)
248 {
249 static const struct i915_subtest tests[] = {
250 SUBTEST(igt_add_request),
251 SUBTEST(igt_wait_request),
252 SUBTEST(igt_fence_wait),
253 SUBTEST(igt_request_rewind),
254 };
255 struct drm_i915_private *i915;
256 int err;
257
258 i915 = mock_gem_device();
259 if (!i915)
260 return -ENOMEM;
261
262 err = i915_subtests(tests, i915);
263 drm_dev_unref(&i915->drm);
264
265 return err;
266 }
267
268 struct live_test {
269 struct drm_i915_private *i915;
270 const char *func;
271 const char *name;
272
273 unsigned int reset_count;
274 };
275
begin_live_test(struct live_test * t,struct drm_i915_private * i915,const char * func,const char * name)276 static int begin_live_test(struct live_test *t,
277 struct drm_i915_private *i915,
278 const char *func,
279 const char *name)
280 {
281 int err;
282
283 t->i915 = i915;
284 t->func = func;
285 t->name = name;
286
287 err = i915_gem_wait_for_idle(i915, I915_WAIT_LOCKED);
288 if (err) {
289 pr_err("%s(%s): failed to idle before, with err=%d!",
290 func, name, err);
291 return err;
292 }
293
294 i915->gpu_error.missed_irq_rings = 0;
295 t->reset_count = i915_reset_count(&i915->gpu_error);
296
297 return 0;
298 }
299
end_live_test(struct live_test * t)300 static int end_live_test(struct live_test *t)
301 {
302 struct drm_i915_private *i915 = t->i915;
303
304 i915_gem_retire_requests(i915);
305
306 if (wait_for(intel_engines_are_idle(i915), 10)) {
307 pr_err("%s(%s): GPU not idle\n", t->func, t->name);
308 return -EIO;
309 }
310
311 if (t->reset_count != i915_reset_count(&i915->gpu_error)) {
312 pr_err("%s(%s): GPU was reset %d times!\n",
313 t->func, t->name,
314 i915_reset_count(&i915->gpu_error) - t->reset_count);
315 return -EIO;
316 }
317
318 if (i915->gpu_error.missed_irq_rings) {
319 pr_err("%s(%s): Missed interrupts on engines %lx\n",
320 t->func, t->name, i915->gpu_error.missed_irq_rings);
321 return -EIO;
322 }
323
324 return 0;
325 }
326
live_nop_request(void * arg)327 static int live_nop_request(void *arg)
328 {
329 struct drm_i915_private *i915 = arg;
330 struct intel_engine_cs *engine;
331 struct live_test t;
332 unsigned int id;
333 int err;
334
335 /* Submit various sized batches of empty requests, to each engine
336 * (individually), and wait for the batch to complete. We can check
337 * the overhead of submitting requests to the hardware.
338 */
339
340 mutex_lock(&i915->drm.struct_mutex);
341
342 for_each_engine(engine, i915, id) {
343 IGT_TIMEOUT(end_time);
344 struct drm_i915_gem_request *request;
345 unsigned long n, prime;
346 ktime_t times[2] = {};
347
348 err = begin_live_test(&t, i915, __func__, engine->name);
349 if (err)
350 goto out_unlock;
351
352 for_each_prime_number_from(prime, 1, 8192) {
353 times[1] = ktime_get_raw();
354
355 for (n = 0; n < prime; n++) {
356 request = i915_gem_request_alloc(engine,
357 i915->kernel_context);
358 if (IS_ERR(request)) {
359 err = PTR_ERR(request);
360 goto out_unlock;
361 }
362
363 /* This space is left intentionally blank.
364 *
365 * We do not actually want to perform any
366 * action with this request, we just want
367 * to measure the latency in allocation
368 * and submission of our breadcrumbs -
369 * ensuring that the bare request is sufficient
370 * for the system to work (i.e. proper HEAD
371 * tracking of the rings, interrupt handling,
372 * etc). It also gives us the lowest bounds
373 * for latency.
374 */
375
376 i915_add_request(request);
377 }
378 i915_wait_request(request,
379 I915_WAIT_LOCKED,
380 MAX_SCHEDULE_TIMEOUT);
381
382 times[1] = ktime_sub(ktime_get_raw(), times[1]);
383 if (prime == 1)
384 times[0] = times[1];
385
386 if (__igt_timeout(end_time, NULL))
387 break;
388 }
389
390 err = end_live_test(&t);
391 if (err)
392 goto out_unlock;
393
394 pr_info("Request latencies on %s: 1 = %lluns, %lu = %lluns\n",
395 engine->name,
396 ktime_to_ns(times[0]),
397 prime, div64_u64(ktime_to_ns(times[1]), prime));
398 }
399
400 out_unlock:
401 mutex_unlock(&i915->drm.struct_mutex);
402 return err;
403 }
404
empty_batch(struct drm_i915_private * i915)405 static struct i915_vma *empty_batch(struct drm_i915_private *i915)
406 {
407 struct drm_i915_gem_object *obj;
408 struct i915_vma *vma;
409 u32 *cmd;
410 int err;
411
412 obj = i915_gem_object_create_internal(i915, PAGE_SIZE);
413 if (IS_ERR(obj))
414 return ERR_CAST(obj);
415
416 cmd = i915_gem_object_pin_map(obj, I915_MAP_WB);
417 if (IS_ERR(cmd)) {
418 err = PTR_ERR(cmd);
419 goto err;
420 }
421 *cmd = MI_BATCH_BUFFER_END;
422 i915_gem_object_unpin_map(obj);
423
424 err = i915_gem_object_set_to_gtt_domain(obj, false);
425 if (err)
426 goto err;
427
428 vma = i915_vma_instance(obj, &i915->ggtt.base, NULL);
429 if (IS_ERR(vma)) {
430 err = PTR_ERR(vma);
431 goto err;
432 }
433
434 err = i915_vma_pin(vma, 0, 0, PIN_USER | PIN_GLOBAL);
435 if (err)
436 goto err;
437
438 return vma;
439
440 err:
441 i915_gem_object_put(obj);
442 return ERR_PTR(err);
443 }
444
445 static struct drm_i915_gem_request *
empty_request(struct intel_engine_cs * engine,struct i915_vma * batch)446 empty_request(struct intel_engine_cs *engine,
447 struct i915_vma *batch)
448 {
449 struct drm_i915_gem_request *request;
450 int err;
451
452 request = i915_gem_request_alloc(engine,
453 engine->i915->kernel_context);
454 if (IS_ERR(request))
455 return request;
456
457 err = engine->emit_flush(request, EMIT_INVALIDATE);
458 if (err)
459 goto out_request;
460
461 err = i915_switch_context(request);
462 if (err)
463 goto out_request;
464
465 err = engine->emit_bb_start(request,
466 batch->node.start,
467 batch->node.size,
468 I915_DISPATCH_SECURE);
469 if (err)
470 goto out_request;
471
472 out_request:
473 __i915_add_request(request, err == 0);
474 return err ? ERR_PTR(err) : request;
475 }
476
live_empty_request(void * arg)477 static int live_empty_request(void *arg)
478 {
479 struct drm_i915_private *i915 = arg;
480 struct intel_engine_cs *engine;
481 struct live_test t;
482 struct i915_vma *batch;
483 unsigned int id;
484 int err = 0;
485
486 /* Submit various sized batches of empty requests, to each engine
487 * (individually), and wait for the batch to complete. We can check
488 * the overhead of submitting requests to the hardware.
489 */
490
491 mutex_lock(&i915->drm.struct_mutex);
492
493 batch = empty_batch(i915);
494 if (IS_ERR(batch)) {
495 err = PTR_ERR(batch);
496 goto out_unlock;
497 }
498
499 for_each_engine(engine, i915, id) {
500 IGT_TIMEOUT(end_time);
501 struct drm_i915_gem_request *request;
502 unsigned long n, prime;
503 ktime_t times[2] = {};
504
505 err = begin_live_test(&t, i915, __func__, engine->name);
506 if (err)
507 goto out_batch;
508
509 /* Warmup / preload */
510 request = empty_request(engine, batch);
511 if (IS_ERR(request)) {
512 err = PTR_ERR(request);
513 goto out_batch;
514 }
515 i915_wait_request(request,
516 I915_WAIT_LOCKED,
517 MAX_SCHEDULE_TIMEOUT);
518
519 for_each_prime_number_from(prime, 1, 8192) {
520 times[1] = ktime_get_raw();
521
522 for (n = 0; n < prime; n++) {
523 request = empty_request(engine, batch);
524 if (IS_ERR(request)) {
525 err = PTR_ERR(request);
526 goto out_batch;
527 }
528 }
529 i915_wait_request(request,
530 I915_WAIT_LOCKED,
531 MAX_SCHEDULE_TIMEOUT);
532
533 times[1] = ktime_sub(ktime_get_raw(), times[1]);
534 if (prime == 1)
535 times[0] = times[1];
536
537 if (__igt_timeout(end_time, NULL))
538 break;
539 }
540
541 err = end_live_test(&t);
542 if (err)
543 goto out_batch;
544
545 pr_info("Batch latencies on %s: 1 = %lluns, %lu = %lluns\n",
546 engine->name,
547 ktime_to_ns(times[0]),
548 prime, div64_u64(ktime_to_ns(times[1]), prime));
549 }
550
551 out_batch:
552 i915_vma_unpin(batch);
553 i915_vma_put(batch);
554 out_unlock:
555 mutex_unlock(&i915->drm.struct_mutex);
556 return err;
557 }
558
recursive_batch(struct drm_i915_private * i915)559 static struct i915_vma *recursive_batch(struct drm_i915_private *i915)
560 {
561 struct i915_gem_context *ctx = i915->kernel_context;
562 struct i915_address_space *vm = ctx->ppgtt ? &ctx->ppgtt->base : &i915->ggtt.base;
563 struct drm_i915_gem_object *obj;
564 const int gen = INTEL_GEN(i915);
565 struct i915_vma *vma;
566 u32 *cmd;
567 int err;
568
569 obj = i915_gem_object_create_internal(i915, PAGE_SIZE);
570 if (IS_ERR(obj))
571 return ERR_CAST(obj);
572
573 vma = i915_vma_instance(obj, vm, NULL);
574 if (IS_ERR(vma)) {
575 err = PTR_ERR(vma);
576 goto err;
577 }
578
579 err = i915_vma_pin(vma, 0, 0, PIN_USER);
580 if (err)
581 goto err;
582
583 err = i915_gem_object_set_to_wc_domain(obj, true);
584 if (err)
585 goto err;
586
587 cmd = i915_gem_object_pin_map(obj, I915_MAP_WC);
588 if (IS_ERR(cmd)) {
589 err = PTR_ERR(cmd);
590 goto err;
591 }
592
593 if (gen >= 8) {
594 *cmd++ = MI_BATCH_BUFFER_START | 1 << 8 | 1;
595 *cmd++ = lower_32_bits(vma->node.start);
596 *cmd++ = upper_32_bits(vma->node.start);
597 } else if (gen >= 6) {
598 *cmd++ = MI_BATCH_BUFFER_START | 1 << 8;
599 *cmd++ = lower_32_bits(vma->node.start);
600 } else if (gen >= 4) {
601 *cmd++ = MI_BATCH_BUFFER_START | MI_BATCH_GTT;
602 *cmd++ = lower_32_bits(vma->node.start);
603 } else {
604 *cmd++ = MI_BATCH_BUFFER_START | MI_BATCH_GTT | 1;
605 *cmd++ = lower_32_bits(vma->node.start);
606 }
607 *cmd++ = MI_BATCH_BUFFER_END; /* terminate early in case of error */
608
609 wmb();
610 i915_gem_object_unpin_map(obj);
611
612 return vma;
613
614 err:
615 i915_gem_object_put(obj);
616 return ERR_PTR(err);
617 }
618
recursive_batch_resolve(struct i915_vma * batch)619 static int recursive_batch_resolve(struct i915_vma *batch)
620 {
621 u32 *cmd;
622
623 cmd = i915_gem_object_pin_map(batch->obj, I915_MAP_WC);
624 if (IS_ERR(cmd))
625 return PTR_ERR(cmd);
626
627 *cmd = MI_BATCH_BUFFER_END;
628 wmb();
629
630 i915_gem_object_unpin_map(batch->obj);
631
632 return 0;
633 }
634
live_all_engines(void * arg)635 static int live_all_engines(void *arg)
636 {
637 struct drm_i915_private *i915 = arg;
638 struct intel_engine_cs *engine;
639 struct drm_i915_gem_request *request[I915_NUM_ENGINES];
640 struct i915_vma *batch;
641 struct live_test t;
642 unsigned int id;
643 int err;
644
645 /* Check we can submit requests to all engines simultaneously. We
646 * send a recursive batch to each engine - checking that we don't
647 * block doing so, and that they don't complete too soon.
648 */
649
650 mutex_lock(&i915->drm.struct_mutex);
651
652 err = begin_live_test(&t, i915, __func__, "");
653 if (err)
654 goto out_unlock;
655
656 batch = recursive_batch(i915);
657 if (IS_ERR(batch)) {
658 err = PTR_ERR(batch);
659 pr_err("%s: Unable to create batch, err=%d\n", __func__, err);
660 goto out_unlock;
661 }
662
663 for_each_engine(engine, i915, id) {
664 request[id] = i915_gem_request_alloc(engine,
665 i915->kernel_context);
666 if (IS_ERR(request[id])) {
667 err = PTR_ERR(request[id]);
668 pr_err("%s: Request allocation failed with err=%d\n",
669 __func__, err);
670 goto out_request;
671 }
672
673 err = engine->emit_flush(request[id], EMIT_INVALIDATE);
674 GEM_BUG_ON(err);
675
676 err = i915_switch_context(request[id]);
677 GEM_BUG_ON(err);
678
679 err = engine->emit_bb_start(request[id],
680 batch->node.start,
681 batch->node.size,
682 0);
683 GEM_BUG_ON(err);
684 request[id]->batch = batch;
685
686 if (!i915_gem_object_has_active_reference(batch->obj)) {
687 i915_gem_object_get(batch->obj);
688 i915_gem_object_set_active_reference(batch->obj);
689 }
690
691 i915_vma_move_to_active(batch, request[id], 0);
692 i915_gem_request_get(request[id]);
693 i915_add_request(request[id]);
694 }
695
696 for_each_engine(engine, i915, id) {
697 if (i915_gem_request_completed(request[id])) {
698 pr_err("%s(%s): request completed too early!\n",
699 __func__, engine->name);
700 err = -EINVAL;
701 goto out_request;
702 }
703 }
704
705 err = recursive_batch_resolve(batch);
706 if (err) {
707 pr_err("%s: failed to resolve batch, err=%d\n", __func__, err);
708 goto out_request;
709 }
710
711 for_each_engine(engine, i915, id) {
712 long timeout;
713
714 timeout = i915_wait_request(request[id],
715 I915_WAIT_LOCKED,
716 MAX_SCHEDULE_TIMEOUT);
717 if (timeout < 0) {
718 err = timeout;
719 pr_err("%s: error waiting for request on %s, err=%d\n",
720 __func__, engine->name, err);
721 goto out_request;
722 }
723
724 GEM_BUG_ON(!i915_gem_request_completed(request[id]));
725 i915_gem_request_put(request[id]);
726 request[id] = NULL;
727 }
728
729 err = end_live_test(&t);
730
731 out_request:
732 for_each_engine(engine, i915, id)
733 if (request[id])
734 i915_gem_request_put(request[id]);
735 i915_vma_unpin(batch);
736 i915_vma_put(batch);
737 out_unlock:
738 mutex_unlock(&i915->drm.struct_mutex);
739 return err;
740 }
741
live_sequential_engines(void * arg)742 static int live_sequential_engines(void *arg)
743 {
744 struct drm_i915_private *i915 = arg;
745 struct drm_i915_gem_request *request[I915_NUM_ENGINES] = {};
746 struct drm_i915_gem_request *prev = NULL;
747 struct intel_engine_cs *engine;
748 struct live_test t;
749 unsigned int id;
750 int err;
751
752 /* Check we can submit requests to all engines sequentially, such
753 * that each successive request waits for the earlier ones. This
754 * tests that we don't execute requests out of order, even though
755 * they are running on independent engines.
756 */
757
758 mutex_lock(&i915->drm.struct_mutex);
759
760 err = begin_live_test(&t, i915, __func__, "");
761 if (err)
762 goto out_unlock;
763
764 for_each_engine(engine, i915, id) {
765 struct i915_vma *batch;
766
767 batch = recursive_batch(i915);
768 if (IS_ERR(batch)) {
769 err = PTR_ERR(batch);
770 pr_err("%s: Unable to create batch for %s, err=%d\n",
771 __func__, engine->name, err);
772 goto out_unlock;
773 }
774
775 request[id] = i915_gem_request_alloc(engine,
776 i915->kernel_context);
777 if (IS_ERR(request[id])) {
778 err = PTR_ERR(request[id]);
779 pr_err("%s: Request allocation failed for %s with err=%d\n",
780 __func__, engine->name, err);
781 goto out_request;
782 }
783
784 if (prev) {
785 err = i915_gem_request_await_dma_fence(request[id],
786 &prev->fence);
787 if (err) {
788 i915_add_request(request[id]);
789 pr_err("%s: Request await failed for %s with err=%d\n",
790 __func__, engine->name, err);
791 goto out_request;
792 }
793 }
794
795 err = engine->emit_flush(request[id], EMIT_INVALIDATE);
796 GEM_BUG_ON(err);
797
798 err = i915_switch_context(request[id]);
799 GEM_BUG_ON(err);
800
801 err = engine->emit_bb_start(request[id],
802 batch->node.start,
803 batch->node.size,
804 0);
805 GEM_BUG_ON(err);
806 request[id]->batch = batch;
807
808 i915_vma_move_to_active(batch, request[id], 0);
809 i915_gem_object_set_active_reference(batch->obj);
810 i915_vma_get(batch);
811
812 i915_gem_request_get(request[id]);
813 i915_add_request(request[id]);
814
815 prev = request[id];
816 }
817
818 for_each_engine(engine, i915, id) {
819 long timeout;
820
821 if (i915_gem_request_completed(request[id])) {
822 pr_err("%s(%s): request completed too early!\n",
823 __func__, engine->name);
824 err = -EINVAL;
825 goto out_request;
826 }
827
828 err = recursive_batch_resolve(request[id]->batch);
829 if (err) {
830 pr_err("%s: failed to resolve batch, err=%d\n",
831 __func__, err);
832 goto out_request;
833 }
834
835 timeout = i915_wait_request(request[id],
836 I915_WAIT_LOCKED,
837 MAX_SCHEDULE_TIMEOUT);
838 if (timeout < 0) {
839 err = timeout;
840 pr_err("%s: error waiting for request on %s, err=%d\n",
841 __func__, engine->name, err);
842 goto out_request;
843 }
844
845 GEM_BUG_ON(!i915_gem_request_completed(request[id]));
846 }
847
848 err = end_live_test(&t);
849
850 out_request:
851 for_each_engine(engine, i915, id) {
852 u32 *cmd;
853
854 if (!request[id])
855 break;
856
857 cmd = i915_gem_object_pin_map(request[id]->batch->obj,
858 I915_MAP_WC);
859 if (!IS_ERR(cmd)) {
860 *cmd = MI_BATCH_BUFFER_END;
861 wmb();
862 i915_gem_object_unpin_map(request[id]->batch->obj);
863 }
864
865 i915_vma_put(request[id]->batch);
866 i915_gem_request_put(request[id]);
867 }
868 out_unlock:
869 mutex_unlock(&i915->drm.struct_mutex);
870 return err;
871 }
872
i915_gem_request_live_selftests(struct drm_i915_private * i915)873 int i915_gem_request_live_selftests(struct drm_i915_private *i915)
874 {
875 static const struct i915_subtest tests[] = {
876 SUBTEST(live_nop_request),
877 SUBTEST(live_all_engines),
878 SUBTEST(live_sequential_engines),
879 SUBTEST(live_empty_request),
880 };
881 return i915_subtests(tests, i915);
882 }
883