summaryrefslogtreecommitdiffstats
path: root/drivers/vfio/pci/mlx5/main.c
blob: 32d1f38d351e7e00625f6b8e6cd825f7afb47073 (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
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2021-2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved
 */

#include <linux/device.h>
#include <linux/eventfd.h>
#include <linux/file.h>
#include <linux/interrupt.h>
#include <linux/iommu.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/notifier.h>
#include <linux/pci.h>
#include <linux/pm_runtime.h>
#include <linux/types.h>
#include <linux/uaccess.h>
#include <linux/vfio.h>
#include <linux/sched/mm.h>
#include <linux/anon_inodes.h>

#include "cmd.h"

/* Arbitrary to prevent userspace from consuming endless memory */
#define MAX_MIGRATION_SIZE (512*1024*1024)

static struct mlx5vf_pci_core_device *mlx5vf_drvdata(struct pci_dev *pdev)
{
	struct vfio_pci_core_device *core_device = dev_get_drvdata(&pdev->dev);

	return container_of(core_device, struct mlx5vf_pci_core_device,
			    core_device);
}

static struct page *
mlx5vf_get_migration_page(struct mlx5_vf_migration_file *migf,
			  unsigned long offset)
{
	unsigned long cur_offset = 0;
	struct scatterlist *sg;
	unsigned int i;

	/* All accesses are sequential */
	if (offset < migf->last_offset || !migf->last_offset_sg) {
		migf->last_offset = 0;
		migf->last_offset_sg = migf->table.sgt.sgl;
		migf->sg_last_entry = 0;
	}

	cur_offset = migf->last_offset;

	for_each_sg(migf->last_offset_sg, sg,
			migf->table.sgt.orig_nents - migf->sg_last_entry, i) {
		if (offset < sg->length + cur_offset) {
			migf->last_offset_sg = sg;
			migf->sg_last_entry += i;
			migf->last_offset = cur_offset;
			return nth_page(sg_page(sg),
					(offset - cur_offset) / PAGE_SIZE);
		}
		cur_offset += sg->length;
	}
	return NULL;
}

static int mlx5vf_add_migration_pages(struct mlx5_vf_migration_file *migf,
				      unsigned int npages)
{
	unsigned int to_alloc = npages;
	struct page **page_list;
	unsigned long filled;
	unsigned int to_fill;
	int ret;

	to_fill = min_t(unsigned int, npages, PAGE_SIZE / sizeof(*page_list));
	page_list = kvzalloc(to_fill * sizeof(*page_list), GFP_KERNEL);
	if (!page_list)
		return -ENOMEM;

	do {
		filled = alloc_pages_bulk_array(GFP_KERNEL, to_fill, page_list);
		if (!filled) {
			ret = -ENOMEM;
			goto err;
		}
		to_alloc -= filled;
		ret = sg_alloc_append_table_from_pages(
			&migf->table, page_list, filled, 0,
			filled << PAGE_SHIFT, UINT_MAX, SG_MAX_SINGLE_ALLOC,
			GFP_KERNEL);

		if (ret)
			goto err;
		migf->allocated_length += filled * PAGE_SIZE;
		/* clean input for another bulk allocation */
		memset(page_list, 0, filled * sizeof(*page_list));
		to_fill = min_t(unsigned int, to_alloc,
				PAGE_SIZE / sizeof(*page_list));
	} while (to_alloc > 0);

	kvfree(page_list);
	return 0;

err:
	kvfree(page_list);
	return ret;
}

static void mlx5vf_disable_fd(struct mlx5_vf_migration_file *migf)
{
	struct sg_page_iter sg_iter;

	mutex_lock(&migf->lock);
	/* Undo alloc_pages_bulk_array() */
	for_each_sgtable_page(&migf->table.sgt, &sg_iter, 0)
		__free_page(sg_page_iter_page(&sg_iter));
	sg_free_append_table(&migf->table);
	migf->disabled = true;
	migf->total_length = 0;
	migf->allocated_length = 0;
	migf->filp->f_pos = 0;
	mutex_unlock(&migf->lock);
}

static int mlx5vf_release_file(struct inode *inode, struct file *filp)
{
	struct mlx5_vf_migration_file *migf = filp->private_data;

	mlx5vf_disable_fd(migf);
	mutex_destroy(&migf->lock);
	kfree(migf);
	return 0;
}

static ssize_t mlx5vf_save_read(struct file *filp, char __user *buf, size_t len,
			       loff_t *pos)
{
	struct mlx5_vf_migration_file *migf = filp->private_data;
	ssize_t done = 0;

	if (pos)
		return -ESPIPE;
	pos = &filp->f_pos;

	if (!(filp->f_flags & O_NONBLOCK)) {
		if (wait_event_interruptible(migf->poll_wait,
			     READ_ONCE(migf->total_length) || migf->is_err))
			return -ERESTARTSYS;
	}

	mutex_lock(&migf->lock);
	if ((filp->f_flags & O_NONBLOCK) && !READ_ONCE(migf->total_length)) {
		done = -EAGAIN;
		goto out_unlock;
	}
	if (*pos > migf->total_length) {
		done = -EINVAL;
		goto out_unlock;
	}
	if (migf->disabled || migf->is_err) {
		done = -ENODEV;
		goto out_unlock;
	}

	len = min_t(size_t, migf->total_length - *pos, len);
	while (len) {
		size_t page_offset;
		struct page *page;
		size_t page_len;
		u8 *from_buff;
		int ret;

		page_offset = (*pos) % PAGE_SIZE;
		page = mlx5vf_get_migration_page(migf, *pos - page_offset);
		if (!page) {
			if (done == 0)
				done = -EINVAL;
			goto out_unlock;
		}

		page_len = min_t(size_t, len, PAGE_SIZE - page_offset);
		from_buff = kmap_local_page(page);
		ret = copy_to_user(buf, from_buff + page_offset, page_len);
		kunmap_local(from_buff);
		if (ret) {
			done = -EFAULT;
			goto out_unlock;
		}
		*pos += page_len;
		len -= page_len;
		done += page_len;
		buf += page_len;
	}

out_unlock:
	mutex_unlock(&migf->lock);
	return done;
}

static __poll_t mlx5vf_save_poll(struct file *filp,
				 struct poll_table_struct *wait)
{
	struct mlx5_vf_migration_file *migf = filp->private_data;
	__poll_t pollflags = 0;

	poll_wait(filp, &migf->poll_wait, wait);

	mutex_lock(&migf->lock);
	if (migf->disabled || migf->is_err)
		pollflags = EPOLLIN | EPOLLRDNORM | EPOLLRDHUP;
	else if (READ_ONCE(migf->total_length))
		pollflags = EPOLLIN | EPOLLRDNORM;
	mutex_unlock(&migf->lock);

	return pollflags;
}

static const struct file_operations mlx5vf_save_fops = {
	.owner = THIS_MODULE,
	.read = mlx5vf_save_read,
	.poll = mlx5vf_save_poll,
	.release = mlx5vf_release_file,
	.llseek = no_llseek,
};

static struct mlx5_vf_migration_file *
mlx5vf_pci_save_device_data(struct mlx5vf_pci_core_device *mvdev)
{
	struct mlx5_vf_migration_file *migf;
	int ret;

	migf = kzalloc(sizeof(*migf), GFP_KERNEL);
	if (!migf)
		return ERR_PTR(-ENOMEM);

	migf->filp = anon_inode_getfile("mlx5vf_mig", &mlx5vf_save_fops, migf,
					O_RDONLY);
	if (IS_ERR(migf->filp)) {
		int err = PTR_ERR(migf->filp);

		kfree(migf);
		return ERR_PTR(err);
	}

	stream_open(migf->filp->f_inode, migf->filp);
	mutex_init(&migf->lock);
	init_waitqueue_head(&migf->poll_wait);
	mlx5_cmd_init_async_ctx(mvdev->mdev, &migf->async_ctx);
	INIT_WORK(&migf->async_data.work, mlx5vf_mig_file_cleanup_cb);
	ret = mlx5vf_cmd_query_vhca_migration_state(mvdev,
						    &migf->total_length);
	if (ret)
		goto out_free;

	ret = mlx5vf_add_migration_pages(
		migf, DIV_ROUND_UP_ULL(migf->total_length, PAGE_SIZE));
	if (ret)
		goto out_free;

	migf->mvdev = mvdev;
	ret = mlx5vf_cmd_save_vhca_state(mvdev, migf);
	if (ret)
		goto out_free;
	return migf;
out_free:
	fput(migf->filp);
	return ERR_PTR(ret);
}

static ssize_t mlx5vf_resume_write(struct file *filp, const char __user *buf,
				   size_t len, loff_t *pos)
{
	struct mlx5_vf_migration_file *migf = filp->private_data;
	loff_t requested_length;
	ssize_t done = 0;

	if (pos)
		return -ESPIPE;
	pos = &filp->f_pos;

	if (*pos < 0 ||
	    check_add_overflow((loff_t)len, *pos, &requested_length))
		return -EINVAL;

	if (requested_length > MAX_MIGRATION_SIZE)
		return -ENOMEM;

	mutex_lock(&migf->lock);
	if (migf->disabled) {
		done = -ENODEV;
		goto out_unlock;
	}

	if (migf->allocated_length < requested_length) {
		done = mlx5vf_add_migration_pages(
			migf,
			DIV_ROUND_UP(requested_length - migf->allocated_length,
				     PAGE_SIZE));
		if (done)
			goto out_unlock;
	}

	while (len) {
		size_t page_offset;
		struct page *page;
		size_t page_len;
		u8 *to_buff;
		int ret;

		page_offset = (*pos) % PAGE_SIZE;
		page = mlx5vf_get_migration_page(migf, *pos - page_offset);
		if (!page) {
			if (done == 0)
				done = -EINVAL;
			goto out_unlock;
		}

		page_len = min_t(size_t, len, PAGE_SIZE - page_offset);
		to_buff = kmap_local_page(page);
		ret = copy_from_user(to_buff + page_offset, buf, page_len);
		kunmap_local(to_buff);
		if (ret) {
			done = -EFAULT;
			goto out_unlock;
		}
		*pos += page_len;
		len -= page_len;
		done += page_len;
		buf += page_len;
		migf->total_length += page_len;
	}
out_unlock:
	mutex_unlock(&migf->lock);
	return done;
}

static const struct file_operations mlx5vf_resume_fops = {
	.owner = THIS_MODULE,
	.write = mlx5vf_resume_write,
	.release = mlx5vf_release_file,
	.llseek = no_llseek,
};

static struct mlx5_vf_migration_file *
mlx5vf_pci_resume_device_data(struct mlx5vf_pci_core_device *mvdev)
{
	struct mlx5_vf_migration_file *migf;

	migf = kzalloc(sizeof(*migf), GFP_KERNEL);
	if (!migf)
		return ERR_PTR(-ENOMEM);

	migf->filp = anon_inode_getfile("mlx5vf_mig", &mlx5vf_resume_fops, migf,
					O_WRONLY);
	if (IS_ERR(migf->filp)) {
		int err = PTR_ERR(migf->filp);

		kfree(migf);
		return ERR_PTR(err);
	}
	stream_open(migf->filp->f_inode, migf->filp);
	mutex_init(&migf->lock);
	return migf;
}

void mlx5vf_disable_fds(struct mlx5vf_pci_core_device *mvdev)
{
	if (mvdev->resuming_migf) {
		mlx5vf_disable_fd(mvdev->resuming_migf);
		fput(mvdev->resuming_migf->filp);
		mvdev->resuming_migf = NULL;
	}
	if (mvdev->saving_migf) {
		mlx5_cmd_cleanup_async_ctx(&mvdev->saving_migf->async_ctx);
		cancel_work_sync(&mvdev->saving_migf->async_data.work);
		mlx5vf_disable_fd(mvdev->saving_migf);
		fput(mvdev->saving_migf->filp);
		mvdev->saving_migf = NULL;
	}
}

static struct file *
mlx5vf_pci_step_device_state_locked(struct mlx5vf_pci_core_device *mvdev,
				    u32 new)
{
	u32 cur = mvdev->mig_state;
	int ret;

	if (cur == VFIO_DEVICE_STATE_RUNNING_P2P && new == VFIO_DEVICE_STATE_STOP) {
		ret = mlx5vf_cmd_suspend_vhca(mvdev,
			MLX5_SUSPEND_VHCA_IN_OP_MOD_SUSPEND_RESPONDER);
		if (ret)
			return ERR_PTR(ret);
		return NULL;
	}

	if (cur == VFIO_DEVICE_STATE_STOP && new == VFIO_DEVICE_STATE_RUNNING_P2P) {
		ret = mlx5vf_cmd_resume_vhca(mvdev,
			MLX5_RESUME_VHCA_IN_OP_MOD_RESUME_RESPONDER);
		if (ret)
			return ERR_PTR(ret);
		return NULL;
	}

	if (cur == VFIO_DEVICE_STATE_RUNNING && new == VFIO_DEVICE_STATE_RUNNING_P2P) {
		ret = mlx5vf_cmd_suspend_vhca(mvdev,
			MLX5_SUSPEND_VHCA_IN_OP_MOD_SUSPEND_INITIATOR);
		if (ret)
			return ERR_PTR(ret);
		return NULL;
	}

	if (cur == VFIO_DEVICE_STATE_RUNNING_P2P && new == VFIO_DEVICE_STATE_RUNNING) {
		ret = mlx5vf_cmd_resume_vhca(mvdev,
			MLX5_RESUME_VHCA_IN_OP_MOD_RESUME_INITIATOR);
		if (ret)
			return ERR_PTR(ret);
		return NULL;
	}

	if (cur == VFIO_DEVICE_STATE_STOP && new == VFIO_DEVICE_STATE_STOP_COPY) {
		struct mlx5_vf_migration_file *migf;

		migf = mlx5vf_pci_save_device_data(mvdev);
		if (IS_ERR(migf))
			return ERR_CAST(migf);
		get_file(migf->filp);
		mvdev->saving_migf = migf;
		return migf->filp;
	}

	if ((cur == VFIO_DEVICE_STATE_STOP_COPY && new == VFIO_DEVICE_STATE_STOP)) {
		mlx5vf_disable_fds(mvdev);
		return NULL;
	}

	if (cur == VFIO_DEVICE_STATE_STOP && new == VFIO_DEVICE_STATE_RESUMING) {
		struct mlx5_vf_migration_file *migf;

		migf = mlx5vf_pci_resume_device_data(mvdev);
		if (IS_ERR(migf))
			return ERR_CAST(migf);
		get_file(migf->filp);
		mvdev->resuming_migf = migf;
		return migf->filp;
	}

	if (cur == VFIO_DEVICE_STATE_RESUMING && new == VFIO_DEVICE_STATE_STOP) {
		ret = mlx5vf_cmd_load_vhca_state(mvdev,
						 mvdev->resuming_migf);
		if (ret)
			return ERR_PTR(ret);
		mlx5vf_disable_fds(mvdev);
		return NULL;
	}

	/*
	 * vfio_mig_get_next_state() does not use arcs other than the above
	 */
	WARN_ON(true);
	return ERR_PTR(-EINVAL);
}

/*
 * This function is called in all state_mutex unlock cases to
 * handle a 'deferred_reset' if exists.
 */
void mlx5vf_state_mutex_unlock(struct mlx5vf_pci_core_device *mvdev)
{
again:
	spin_lock(&mvdev->reset_lock);
	if (mvdev->deferred_reset) {
		mvdev->deferred_reset = false;
		spin_unlock(&mvdev->reset_lock);
		mvdev->mig_state = VFIO_DEVICE_STATE_RUNNING;
		mlx5vf_disable_fds(mvdev);
		goto again;
	}
	mutex_unlock(&mvdev->state_mutex);
	spin_unlock(&mvdev->reset_lock);
}

static struct file *
mlx5vf_pci_set_device_state(struct vfio_device *vdev,
			    enum vfio_device_mig_state new_state)
{
	struct mlx5vf_pci_core_device *mvdev = container_of(
		vdev, struct mlx5vf_pci_core_device, core_device.vdev);
	enum vfio_device_mig_state next_state;
	struct file *res = NULL;
	int ret;

	mutex_lock(&mvdev->state_mutex);
	while (new_state != mvdev->mig_state) {
		ret = vfio_mig_get_next_state(vdev, mvdev->mig_state,
					      new_state, &next_state);
		if (ret) {
			res = ERR_PTR(ret);
			break;
		}
		res = mlx5vf_pci_step_device_state_locked(mvdev, next_state);
		if (IS_ERR(res))
			break;
		mvdev->mig_state = next_state;
		if (WARN_ON(res && new_state != mvdev->mig_state)) {
			fput(res);
			res = ERR_PTR(-EINVAL);
			break;
		}
	}
	mlx5vf_state_mutex_unlock(mvdev);
	return res;
}

static int mlx5vf_pci_get_device_state(struct vfio_device *vdev,
				       enum vfio_device_mig_state *curr_state)
{
	struct mlx5vf_pci_core_device *mvdev = container_of(
		vdev, struct mlx5vf_pci_core_device, core_device.vdev);

	mutex_lock(&mvdev->state_mutex);
	*curr_state = mvdev->mig_state;
	mlx5vf_state_mutex_unlock(mvdev);
	return 0;
}

static void mlx5vf_pci_aer_reset_done(struct pci_dev *pdev)
{
	struct mlx5vf_pci_core_device *mvdev = mlx5vf_drvdata(pdev);

	if (!mvdev->migrate_cap)
		return;

	/*
	 * As the higher VFIO layers are holding locks across reset and using
	 * those same locks with the mm_lock we need to prevent ABBA deadlock
	 * with the state_mutex and mm_lock.
	 * In case the state_mutex was taken already we defer the cleanup work
	 * to the unlock flow of the other running context.
	 */
	spin_lock(&mvdev->reset_lock);
	mvdev->deferred_reset = true;
	if (!mutex_trylock(&mvdev->state_mutex)) {
		spin_unlock(&mvdev->reset_lock);
		return;
	}
	spin_unlock(&mvdev->reset_lock);
	mlx5vf_state_mutex_unlock(mvdev);
}

static int mlx5vf_pci_open_device(struct vfio_device *core_vdev)
{
	struct mlx5vf_pci_core_device *mvdev = container_of(
		core_vdev, struct mlx5vf_pci_core_device, core_device.vdev);
	struct vfio_pci_core_device *vdev = &mvdev->core_device;
	int ret;

	ret = vfio_pci_core_enable(vdev);
	if (ret)
		return ret;

	if (mvdev->migrate_cap)
		mvdev->mig_state = VFIO_DEVICE_STATE_RUNNING;
	vfio_pci_core_finish_enable(vdev);
	return 0;
}

static void mlx5vf_pci_close_device(struct vfio_device *core_vdev)
{
	struct mlx5vf_pci_core_device *mvdev = container_of(
		core_vdev, struct mlx5vf_pci_core_device, core_device.vdev);

	mlx5vf_cmd_close_migratable(mvdev);
	vfio_pci_core_close_device(core_vdev);
}

static const struct vfio_migration_ops mlx5vf_pci_mig_ops = {
	.migration_set_state = mlx5vf_pci_set_device_state,
	.migration_get_state = mlx5vf_pci_get_device_state,
};

static const struct vfio_log_ops mlx5vf_pci_log_ops = {
	.log_start = mlx5vf_start_page_tracker,
	.log_stop = mlx5vf_stop_page_tracker,
	.log_read_and_clear = mlx5vf_tracker_read_and_clear,
};

static int mlx5vf_pci_init_dev(struct vfio_device *core_vdev)
{
	struct mlx5vf_pci_core_device *mvdev = container_of(core_vdev,
			struct mlx5vf_pci_core_device, core_device.vdev);
	int ret;

	ret = vfio_pci_core_init_dev(core_vdev);
	if (ret)
		return ret;

	mlx5vf_cmd_set_migratable(mvdev, &mlx5vf_pci_mig_ops,
				  &mlx5vf_pci_log_ops);

	return 0;
}

static void mlx5vf_pci_release_dev(struct vfio_device *core_vdev)
{
	struct mlx5vf_pci_core_device *mvdev = container_of(core_vdev,
			struct mlx5vf_pci_core_device, core_device.vdev);

	mlx5vf_cmd_remove_migratable(mvdev);
	vfio_pci_core_release_dev(core_vdev);
}

static const struct vfio_device_ops mlx5vf_pci_ops = {
	.name = "mlx5-vfio-pci",
	.init = mlx5vf_pci_init_dev,
	.release = mlx5vf_pci_release_dev,
	.open_device = mlx5vf_pci_open_device,
	.close_device = mlx5vf_pci_close_device,
	.ioctl = vfio_pci_core_ioctl,
	.device_feature = vfio_pci_core_ioctl_feature,
	.read = vfio_pci_core_read,
	.write = vfio_pci_core_write,
	.mmap = vfio_pci_core_mmap,
	.request = vfio_pci_core_request,
	.match = vfio_pci_core_match,
	.bind_iommufd = vfio_iommufd_physical_bind,
	.unbind_iommufd = vfio_iommufd_physical_unbind,
	.attach_ioas = vfio_iommufd_physical_attach_ioas,
};

static int mlx5vf_pci_probe(struct pci_dev *pdev,
			    const struct pci_device_id *id)
{
	struct mlx5vf_pci_core_device *mvdev;
	int ret;

	mvdev = vfio_alloc_device(mlx5vf_pci_core_device, core_device.vdev,
				  &pdev->dev, &mlx5vf_pci_ops);
	if (IS_ERR(mvdev))
		return PTR_ERR(mvdev);

	dev_set_drvdata(&pdev->dev, &mvdev->core_device);
	ret = vfio_pci_core_register_device(&mvdev->core_device);
	if (ret)
		goto out_put_vdev;
	return 0;

out_put_vdev:
	vfio_put_device(&mvdev->core_device.vdev);
	return ret;
}

static void mlx5vf_pci_remove(struct pci_dev *pdev)
{
	struct mlx5vf_pci_core_device *mvdev = mlx5vf_drvdata(pdev);

	vfio_pci_core_unregister_device(&mvdev->core_device);
	vfio_put_device(&mvdev->core_device.vdev);
}

static const struct pci_device_id mlx5vf_pci_table[] = {
	{ PCI_DRIVER_OVERRIDE_DEVICE_VFIO(PCI_VENDOR_ID_MELLANOX, 0x101e) }, /* ConnectX Family mlx5Gen Virtual Function */
	{}
};

MODULE_DEVICE_TABLE(pci, mlx5vf_pci_table);

static const struct pci_error_handlers mlx5vf_err_handlers = {
	.reset_done = mlx5vf_pci_aer_reset_done,
	.error_detected = vfio_pci_core_aer_err_detected,
};

static struct pci_driver mlx5vf_pci_driver = {
	.name = KBUILD_MODNAME,
	.id_table = mlx5vf_pci_table,
	.probe = mlx5vf_pci_probe,
	.remove = mlx5vf_pci_remove,
	.err_handler = &mlx5vf_err_handlers,
	.driver_managed_dma = true,
};

static void __exit mlx5vf_pci_cleanup(void)
{
	pci_unregister_driver(&mlx5vf_pci_driver);
}

static int __init mlx5vf_pci_init(void)
{
	return pci_register_driver(&mlx5vf_pci_driver);
}

module_init(mlx5vf_pci_init);
module_exit(mlx5vf_pci_cleanup);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Max Gurtovoy <mgurtovoy@nvidia.com>");
MODULE_AUTHOR("Yishai Hadas <yishaih@nvidia.com>");
MODULE_DESCRIPTION(
	"MLX5 VFIO PCI - User Level meta-driver for MLX5 device family");