summaryrefslogtreecommitdiff
path: root/drivers/accel/ivpu/ivpu_job.c
blob: 689dc0d13b8fadece4cbc0e56cbc21c4e2cc3509 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2020-2023 Intel Corporation
 */

#include <drm/drm_file.h>

#include <linux/bitfield.h>
#include <linux/highmem.h>
#include <linux/kthread.h>
#include <linux/pci.h>
#include <linux/module.h>
#include <uapi/drm/ivpu_accel.h>

#include "ivpu_drv.h"
#include "ivpu_hw.h"
#include "ivpu_ipc.h"
#include "ivpu_job.h"
#include "ivpu_jsm_msg.h"
#include "ivpu_pm.h"

#define CMD_BUF_IDX	     0
#define JOB_ID_JOB_MASK	     GENMASK(7, 0)
#define JOB_ID_CONTEXT_MASK  GENMASK(31, 8)
#define JOB_MAX_BUFFER_COUNT 65535

static unsigned int ivpu_tdr_timeout_ms;
module_param_named(tdr_timeout_ms, ivpu_tdr_timeout_ms, uint, 0644);
MODULE_PARM_DESC(tdr_timeout_ms, "Timeout for device hang detection, in milliseconds, 0 - default");

static void ivpu_cmdq_ring_db(struct ivpu_device *vdev, struct ivpu_cmdq *cmdq)
{
	ivpu_hw_reg_db_set(vdev, cmdq->db_id);
}

static struct ivpu_cmdq *ivpu_cmdq_alloc(struct ivpu_file_priv *file_priv, u16 engine)
{
	struct ivpu_device *vdev = file_priv->vdev;
	struct vpu_job_queue_header *jobq_header;
	struct ivpu_cmdq *cmdq;

	cmdq = kzalloc(sizeof(*cmdq), GFP_KERNEL);
	if (!cmdq)
		return NULL;

	cmdq->mem = ivpu_bo_alloc_internal(vdev, 0, SZ_4K, DRM_IVPU_BO_WC);
	if (!cmdq->mem)
		goto cmdq_free;

	cmdq->db_id = file_priv->ctx.id + engine * ivpu_get_context_count(vdev);
	cmdq->entry_count = (u32)((ivpu_bo_size(cmdq->mem) - sizeof(struct vpu_job_queue_header)) /
				  sizeof(struct vpu_job_queue_entry));

	cmdq->jobq = (struct vpu_job_queue *)ivpu_bo_vaddr(cmdq->mem);
	jobq_header = &cmdq->jobq->header;
	jobq_header->engine_idx = engine;
	jobq_header->head = 0;
	jobq_header->tail = 0;
	wmb(); /* Flush WC buffer for jobq->header */

	return cmdq;

cmdq_free:
	kfree(cmdq);
	return NULL;
}

static void ivpu_cmdq_free(struct ivpu_file_priv *file_priv, struct ivpu_cmdq *cmdq)
{
	if (!cmdq)
		return;

	ivpu_bo_free_internal(cmdq->mem);
	kfree(cmdq);
}

static struct ivpu_cmdq *ivpu_cmdq_acquire(struct ivpu_file_priv *file_priv, u16 engine)
{
	struct ivpu_device *vdev = file_priv->vdev;
	struct ivpu_cmdq *cmdq = file_priv->cmdq[engine];
	int ret;

	lockdep_assert_held(&file_priv->lock);

	if (!cmdq) {
		cmdq = ivpu_cmdq_alloc(file_priv, engine);
		if (!cmdq)
			return NULL;
		file_priv->cmdq[engine] = cmdq;
	}

	if (cmdq->db_registered)
		return cmdq;

	ret = ivpu_jsm_register_db(vdev, file_priv->ctx.id, cmdq->db_id,
				   cmdq->mem->vpu_addr, ivpu_bo_size(cmdq->mem));
	if (ret)
		return NULL;

	cmdq->db_registered = true;

	return cmdq;
}

static void ivpu_cmdq_release_locked(struct ivpu_file_priv *file_priv, u16 engine)
{
	struct ivpu_cmdq *cmdq = file_priv->cmdq[engine];

	lockdep_assert_held(&file_priv->lock);

	if (cmdq) {
		file_priv->cmdq[engine] = NULL;
		if (cmdq->db_registered)
			ivpu_jsm_unregister_db(file_priv->vdev, cmdq->db_id);

		ivpu_cmdq_free(file_priv, cmdq);
	}
}

void ivpu_cmdq_release_all(struct ivpu_file_priv *file_priv)
{
	int i;

	mutex_lock(&file_priv->lock);

	for (i = 0; i < IVPU_NUM_ENGINES; i++)
		ivpu_cmdq_release_locked(file_priv, i);

	mutex_unlock(&file_priv->lock);
}

/*
 * Mark the doorbell as unregistered and reset job queue pointers.
 * This function needs to be called when the VPU hardware is restarted
 * and FW looses job queue state. The next time job queue is used it
 * will be registered again.
 */
static void ivpu_cmdq_reset_locked(struct ivpu_file_priv *file_priv, u16 engine)
{
	struct ivpu_cmdq *cmdq = file_priv->cmdq[engine];

	lockdep_assert_held(&file_priv->lock);

	if (cmdq) {
		cmdq->db_registered = false;
		cmdq->jobq->header.head = 0;
		cmdq->jobq->header.tail = 0;
		wmb(); /* Flush WC buffer for jobq header */
	}
}

static void ivpu_cmdq_reset_all(struct ivpu_file_priv *file_priv)
{
	int i;

	mutex_lock(&file_priv->lock);

	for (i = 0; i < IVPU_NUM_ENGINES; i++)
		ivpu_cmdq_reset_locked(file_priv, i);

	mutex_unlock(&file_priv->lock);
}

void ivpu_cmdq_reset_all_contexts(struct ivpu_device *vdev)
{
	struct ivpu_file_priv *file_priv;
	unsigned long ctx_id;

	xa_for_each(&vdev->context_xa, ctx_id, file_priv) {
		file_priv = ivpu_file_priv_get_by_ctx_id(vdev, ctx_id);
		if (!file_priv)
			continue;

		ivpu_cmdq_reset_all(file_priv);

		ivpu_file_priv_put(&file_priv);
	}
}

static int ivpu_cmdq_push_job(struct ivpu_cmdq *cmdq, struct ivpu_job *job)
{
	struct ivpu_device *vdev = job->vdev;
	struct vpu_job_queue_header *header = &cmdq->jobq->header;
	struct vpu_job_queue_entry *entry;
	u32 tail = READ_ONCE(header->tail);
	u32 next_entry = (tail + 1) % cmdq->entry_count;

	/* Check if there is space left in job queue */
	if (next_entry == header->head) {
		ivpu_dbg(vdev, JOB, "Job queue full: ctx %d engine %d db %d head %d tail %d\n",
			 job->file_priv->ctx.id, job->engine_idx, cmdq->db_id, header->head, tail);
		return -EBUSY;
	}

	entry = &cmdq->jobq->job[tail];
	entry->batch_buf_addr = job->cmd_buf_vpu_addr;
	entry->job_id = job->job_id;
	entry->flags = 0;
	wmb(); /* Ensure that tail is updated after filling entry */
	header->tail = next_entry;
	wmb(); /* Flush WC buffer for jobq header */

	return 0;
}

struct ivpu_fence {
	struct dma_fence base;
	spinlock_t lock; /* protects base */
	struct ivpu_device *vdev;
};

static inline struct ivpu_fence *to_vpu_fence(struct dma_fence *fence)
{
	return container_of(fence, struct ivpu_fence, base);
}

static const char *ivpu_fence_get_driver_name(struct dma_fence *fence)
{
	return DRIVER_NAME;
}

static const char *ivpu_fence_get_timeline_name(struct dma_fence *fence)
{
	struct ivpu_fence *ivpu_fence = to_vpu_fence(fence);

	return dev_name(ivpu_fence->vdev->drm.dev);
}

static const struct dma_fence_ops ivpu_fence_ops = {
	.get_driver_name = ivpu_fence_get_driver_name,
	.get_timeline_name = ivpu_fence_get_timeline_name,
};

static struct dma_fence *ivpu_fence_create(struct ivpu_device *vdev)
{
	struct ivpu_fence *fence;

	fence = kzalloc(sizeof(*fence), GFP_KERNEL);
	if (!fence)
		return NULL;

	fence->vdev = vdev;
	spin_lock_init(&fence->lock);
	dma_fence_init(&fence->base, &ivpu_fence_ops, &fence->lock, dma_fence_context_alloc(1), 1);

	return &fence->base;
}

static void job_get(struct ivpu_job *job, struct ivpu_job **link)
{
	struct ivpu_device *vdev = job->vdev;

	kref_get(&job->ref);
	*link = job;

	ivpu_dbg(vdev, KREF, "Job get: id %u refcount %u\n", job->job_id, kref_read(&job->ref));
}

static void job_release(struct kref *ref)
{
	struct ivpu_job *job = container_of(ref, struct ivpu_job, ref);
	struct ivpu_device *vdev = job->vdev;
	u32 i;

	for (i = 0; i < job->bo_count; i++)
		if (job->bos[i])
			drm_gem_object_put(&job->bos[i]->base);

	dma_fence_put(job->done_fence);
	ivpu_file_priv_put(&job->file_priv);

	ivpu_dbg(vdev, KREF, "Job released: id %u\n", job->job_id);
	kfree(job);

	/* Allow the VPU to get suspended, must be called after ivpu_file_priv_put() */
	ivpu_rpm_put(vdev);
}

static void job_put(struct ivpu_job *job)
{
	struct ivpu_device *vdev = job->vdev;

	ivpu_dbg(vdev, KREF, "Job put: id %u refcount %u\n", job->job_id, kref_read(&job->ref));
	kref_put(&job->ref, job_release);
}

static struct ivpu_job *
ivpu_create_job(struct ivpu_file_priv *file_priv, u32 engine_idx, u32 bo_count)
{
	struct ivpu_device *vdev = file_priv->vdev;
	struct ivpu_job *job;
	int ret;

	ret = ivpu_rpm_get(vdev);
	if (ret < 0)
		return NULL;

	job = kzalloc(struct_size(job, bos, bo_count), GFP_KERNEL);
	if (!job)
		goto err_rpm_put;

	kref_init(&job->ref);

	job->vdev = vdev;
	job->engine_idx = engine_idx;
	job->bo_count = bo_count;
	job->done_fence = ivpu_fence_create(vdev);
	if (!job->done_fence) {
		ivpu_warn_ratelimited(vdev, "Failed to create a fence\n");
		goto err_free_job;
	}

	job->file_priv = ivpu_file_priv_get(file_priv);

	ivpu_dbg(vdev, JOB, "Job created: ctx %2d engine %d", file_priv->ctx.id, job->engine_idx);

	return job;

err_free_job:
	kfree(job);
err_rpm_put:
	ivpu_rpm_put(vdev);
	return NULL;
}

static int ivpu_job_done(struct ivpu_device *vdev, u32 job_id, u32 job_status)
{
	struct ivpu_job *job;

	job = xa_erase(&vdev->submitted_jobs_xa, job_id);
	if (!job)
		return -ENOENT;

	if (job->file_priv->has_mmu_faults)
		job_status = VPU_JSM_STATUS_ABORTED;

	job->bos[CMD_BUF_IDX]->job_status = job_status;
	dma_fence_signal(job->done_fence);

	ivpu_dbg(vdev, JOB, "Job complete:  id %3u ctx %2d engine %d status 0x%x\n",
		 job->job_id, job->file_priv->ctx.id, job->engine_idx, job_status);

	job_put(job);
	return 0;
}

static void ivpu_job_done_message(struct ivpu_device *vdev, void *msg)
{
	struct vpu_ipc_msg_payload_job_done *payload;
	struct vpu_jsm_msg *job_ret_msg = msg;
	int ret;

	payload = (struct vpu_ipc_msg_payload_job_done *)&job_ret_msg->payload;

	ret = ivpu_job_done(vdev, payload->job_id, payload->job_status);
	if (ret)
		ivpu_err(vdev, "Failed to finish job %d: %d\n", payload->job_id, ret);
}

void ivpu_jobs_abort_all(struct ivpu_device *vdev)
{
	struct ivpu_job *job;
	unsigned long id;

	xa_for_each(&vdev->submitted_jobs_xa, id, job)
		ivpu_job_done(vdev, id, VPU_JSM_STATUS_ABORTED);
}

static int ivpu_direct_job_submission(struct ivpu_job *job)
{
	struct ivpu_file_priv *file_priv = job->file_priv;
	struct ivpu_device *vdev = job->vdev;
	struct xa_limit job_id_range;
	struct ivpu_cmdq *cmdq;
	int ret;

	mutex_lock(&file_priv->lock);

	cmdq = ivpu_cmdq_acquire(job->file_priv, job->engine_idx);
	if (!cmdq) {
		ivpu_warn(vdev, "Failed get job queue, ctx %d engine %d\n",
			  file_priv->ctx.id, job->engine_idx);
		ret = -EINVAL;
		goto err_unlock;
	}

	job_id_range.min = FIELD_PREP(JOB_ID_CONTEXT_MASK, (file_priv->ctx.id - 1));
	job_id_range.max = job_id_range.min | JOB_ID_JOB_MASK;

	job_get(job, &job);
	ret = xa_alloc(&vdev->submitted_jobs_xa, &job->job_id, job, job_id_range, GFP_KERNEL);
	if (ret) {
		ivpu_warn_ratelimited(vdev, "Failed to allocate job id: %d\n", ret);
		goto err_job_put;
	}

	ret = ivpu_cmdq_push_job(cmdq, job);
	if (ret)
		goto err_xa_erase;

	ivpu_dbg(vdev, JOB, "Job submitted: id %3u addr 0x%llx ctx %2d engine %d next %d\n",
		 job->job_id, job->cmd_buf_vpu_addr, file_priv->ctx.id,
		 job->engine_idx, cmdq->jobq->header.tail);

	if (ivpu_test_mode == IVPU_TEST_MODE_NULL_HW) {
		ivpu_job_done(vdev, job->job_id, VPU_JSM_STATUS_SUCCESS);
		cmdq->jobq->header.head = cmdq->jobq->header.tail;
		wmb(); /* Flush WC buffer for jobq header */
	} else {
		ivpu_cmdq_ring_db(vdev, cmdq);
	}

	mutex_unlock(&file_priv->lock);
	return 0;

err_xa_erase:
	xa_erase(&vdev->submitted_jobs_xa, job->job_id);
err_job_put:
	job_put(job);
err_unlock:
	mutex_unlock(&file_priv->lock);
	return ret;
}

static int
ivpu_job_prepare_bos_for_submit(struct drm_file *file, struct ivpu_job *job, u32 *buf_handles,
				u32 buf_count, u32 commands_offset)
{
	struct ivpu_file_priv *file_priv = file->driver_priv;
	struct ivpu_device *vdev = file_priv->vdev;
	struct ww_acquire_ctx acquire_ctx;
	enum dma_resv_usage usage;
	struct ivpu_bo *bo;
	int ret;
	u32 i;

	for (i = 0; i < buf_count; i++) {
		struct drm_gem_object *obj = drm_gem_object_lookup(file, buf_handles[i]);

		if (!obj)
			return -ENOENT;

		job->bos[i] = to_ivpu_bo(obj);

		ret = ivpu_bo_pin(job->bos[i]);
		if (ret)
			return ret;
	}

	bo = job->bos[CMD_BUF_IDX];
	if (!dma_resv_test_signaled(bo->base.resv, DMA_RESV_USAGE_READ)) {
		ivpu_warn(vdev, "Buffer is already in use\n");
		return -EBUSY;
	}

	if (commands_offset >= ivpu_bo_size(bo)) {
		ivpu_warn(vdev, "Invalid command buffer offset %u\n", commands_offset);
		return -EINVAL;
	}

	job->cmd_buf_vpu_addr = bo->vpu_addr + commands_offset;

	ret = drm_gem_lock_reservations((struct drm_gem_object **)job->bos, buf_count,
					&acquire_ctx);
	if (ret) {
		ivpu_warn(vdev, "Failed to lock reservations: %d\n", ret);
		return ret;
	}

	for (i = 0; i < buf_count; i++) {
		ret = dma_resv_reserve_fences(job->bos[i]->base.resv, 1);
		if (ret) {
			ivpu_warn(vdev, "Failed to reserve fences: %d\n", ret);
			goto unlock_reservations;
		}
	}

	for (i = 0; i < buf_count; i++) {
		usage = (i == CMD_BUF_IDX) ? DMA_RESV_USAGE_WRITE : DMA_RESV_USAGE_BOOKKEEP;
		dma_resv_add_fence(job->bos[i]->base.resv, job->done_fence, usage);
	}

unlock_reservations:
	drm_gem_unlock_reservations((struct drm_gem_object **)job->bos, buf_count, &acquire_ctx);

	wmb(); /* Flush write combining buffers */

	return ret;
}

int ivpu_submit_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
{
	struct ivpu_file_priv *file_priv = file->driver_priv;
	struct ivpu_device *vdev = file_priv->vdev;
	struct drm_ivpu_submit *params = data;
	struct ivpu_job *job;
	u32 *buf_handles;
	int idx, ret;

	if (params->engine > DRM_IVPU_ENGINE_COPY)
		return -EINVAL;

	if (params->buffer_count == 0 || params->buffer_count > JOB_MAX_BUFFER_COUNT)
		return -EINVAL;

	if (!IS_ALIGNED(params->commands_offset, 8))
		return -EINVAL;

	if (!file_priv->ctx.id)
		return -EINVAL;

	if (file_priv->has_mmu_faults)
		return -EBADFD;

	buf_handles = kcalloc(params->buffer_count, sizeof(u32), GFP_KERNEL);
	if (!buf_handles)
		return -ENOMEM;

	ret = copy_from_user(buf_handles,
			     (void __user *)params->buffers_ptr,
			     params->buffer_count * sizeof(u32));
	if (ret) {
		ret = -EFAULT;
		goto free_handles;
	}

	if (!drm_dev_enter(&vdev->drm, &idx)) {
		ret = -ENODEV;
		goto free_handles;
	}

	ivpu_dbg(vdev, JOB, "Submit ioctl: ctx %u buf_count %u\n",
		 file_priv->ctx.id, params->buffer_count);

	job = ivpu_create_job(file_priv, params->engine, params->buffer_count);
	if (!job) {
		ivpu_err(vdev, "Failed to create job\n");
		ret = -ENOMEM;
		goto dev_exit;
	}

	ret = ivpu_job_prepare_bos_for_submit(file, job, buf_handles, params->buffer_count,
					      params->commands_offset);
	if (ret) {
		ivpu_err(vdev, "Failed to prepare job, ret %d\n", ret);
		goto job_put;
	}

	ret = ivpu_direct_job_submission(job);
	if (ret) {
		dma_fence_signal(job->done_fence);
		ivpu_err(vdev, "Failed to submit job to the HW, ret %d\n", ret);
	}

job_put:
	job_put(job);
dev_exit:
	drm_dev_exit(idx);
free_handles:
	kfree(buf_handles);

	return ret;
}

static int ivpu_job_done_thread(void *arg)
{
	struct ivpu_device *vdev = (struct ivpu_device *)arg;
	struct ivpu_ipc_consumer cons;
	struct vpu_jsm_msg jsm_msg;
	bool jobs_submitted;
	unsigned int timeout;
	int ret;

	ivpu_dbg(vdev, JOB, "Started %s\n", __func__);

	ivpu_ipc_consumer_add(vdev, &cons, VPU_IPC_CHAN_JOB_RET);

	while (!kthread_should_stop()) {
		timeout = ivpu_tdr_timeout_ms ? ivpu_tdr_timeout_ms : vdev->timeout.tdr;
		jobs_submitted = !xa_empty(&vdev->submitted_jobs_xa);
		ret = ivpu_ipc_receive(vdev, &cons, NULL, &jsm_msg, timeout);
		if (!ret) {
			ivpu_job_done_message(vdev, &jsm_msg);
		} else if (ret == -ETIMEDOUT) {
			if (jobs_submitted && !xa_empty(&vdev->submitted_jobs_xa)) {
				ivpu_err(vdev, "TDR detected, timeout %d ms", timeout);
				ivpu_hw_diagnose_failure(vdev);
				ivpu_pm_schedule_recovery(vdev);
			}
		}
	}

	ivpu_ipc_consumer_del(vdev, &cons);

	ivpu_jobs_abort_all(vdev);

	ivpu_dbg(vdev, JOB, "Stopped %s\n", __func__);
	return 0;
}

int ivpu_job_done_thread_init(struct ivpu_device *vdev)
{
	struct task_struct *thread;

	thread = kthread_run(&ivpu_job_done_thread, (void *)vdev, "ivpu_job_done_thread");
	if (IS_ERR(thread)) {
		ivpu_err(vdev, "Failed to start job completion thread\n");
		return -EIO;
	}

	get_task_struct(thread);
	wake_up_process(thread);

	vdev->job_done_thread = thread;

	return 0;
}

void ivpu_job_done_thread_fini(struct ivpu_device *vdev)
{
	kthread_stop(vdev->job_done_thread);
	put_task_struct(vdev->job_done_thread);
}