summaryrefslogtreecommitdiffstats
path: root/drivers/net/ifc/ifcvf_vdpa.c
blob: 88d8140377e47fc6eb936ee93f9f72081a339baf (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
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2018 Intel Corporation
 */

#include <unistd.h>
#include <pthread.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/epoll.h>

#include <rte_malloc.h>
#include <rte_memory.h>
#include <rte_bus_pci.h>
#include <rte_vhost.h>
#include <rte_vdpa.h>
#include <rte_vfio.h>
#include <rte_spinlock.h>
#include <rte_log.h>

#include "base/ifcvf.h"

#define DRV_LOG(level, fmt, args...) \
	rte_log(RTE_LOG_ ## level, ifcvf_vdpa_logtype, \
		"%s(): " fmt "\n", __func__, ##args)

#ifndef PAGE_SIZE
#define PAGE_SIZE 4096
#endif

static int ifcvf_vdpa_logtype;

struct ifcvf_internal {
	struct rte_vdpa_dev_addr dev_addr;
	struct rte_pci_device *pdev;
	struct ifcvf_hw hw;
	int vfio_container_fd;
	int vfio_group_fd;
	int vfio_dev_fd;
	pthread_t tid;	/* thread for notify relay */
	int epfd;
	int vid;
	int did;
	uint16_t max_queues;
	uint64_t features;
	rte_atomic32_t started;
	rte_atomic32_t dev_attached;
	rte_atomic32_t running;
	rte_spinlock_t lock;
};

struct internal_list {
	TAILQ_ENTRY(internal_list) next;
	struct ifcvf_internal *internal;
};

TAILQ_HEAD(internal_list_head, internal_list);
static struct internal_list_head internal_list =
	TAILQ_HEAD_INITIALIZER(internal_list);

static pthread_mutex_t internal_list_lock = PTHREAD_MUTEX_INITIALIZER;

static struct internal_list *
find_internal_resource_by_did(int did)
{
	int found = 0;
	struct internal_list *list;

	pthread_mutex_lock(&internal_list_lock);

	TAILQ_FOREACH(list, &internal_list, next) {
		if (did == list->internal->did) {
			found = 1;
			break;
		}
	}

	pthread_mutex_unlock(&internal_list_lock);

	if (!found)
		return NULL;

	return list;
}

static struct internal_list *
find_internal_resource_by_dev(struct rte_pci_device *pdev)
{
	int found = 0;
	struct internal_list *list;

	pthread_mutex_lock(&internal_list_lock);

	TAILQ_FOREACH(list, &internal_list, next) {
		if (pdev == list->internal->pdev) {
			found = 1;
			break;
		}
	}

	pthread_mutex_unlock(&internal_list_lock);

	if (!found)
		return NULL;

	return list;
}

static int
ifcvf_vfio_setup(struct ifcvf_internal *internal)
{
	struct rte_pci_device *dev = internal->pdev;
	char devname[RTE_DEV_NAME_MAX_LEN] = {0};
	int iommu_group_num;
	int ret = 0;
	int i;

	internal->vfio_dev_fd = -1;
	internal->vfio_group_fd = -1;
	internal->vfio_container_fd = -1;

	rte_pci_device_name(&dev->addr, devname, RTE_DEV_NAME_MAX_LEN);
	rte_vfio_get_group_num(rte_pci_get_sysfs_path(), devname,
			&iommu_group_num);

	internal->vfio_container_fd = rte_vfio_container_create();
	if (internal->vfio_container_fd < 0)
		return -1;

	internal->vfio_group_fd = rte_vfio_container_group_bind(
			internal->vfio_container_fd, iommu_group_num);
	if (internal->vfio_group_fd < 0)
		goto err;

	if (rte_pci_map_device(dev))
		goto err;

	internal->vfio_dev_fd = dev->intr_handle.vfio_dev_fd;

	for (i = 0; i < RTE_MIN(PCI_MAX_RESOURCE, IFCVF_PCI_MAX_RESOURCE);
			i++) {
		internal->hw.mem_resource[i].addr =
			internal->pdev->mem_resource[i].addr;
		internal->hw.mem_resource[i].phys_addr =
			internal->pdev->mem_resource[i].phys_addr;
		internal->hw.mem_resource[i].len =
			internal->pdev->mem_resource[i].len;
	}
	ret = ifcvf_init_hw(&internal->hw, internal->pdev);

	return ret;

err:
	rte_vfio_container_destroy(internal->vfio_container_fd);
	return -1;
}

static int
ifcvf_dma_map(struct ifcvf_internal *internal, int do_map)
{
	uint32_t i;
	int ret;
	struct rte_vhost_memory *mem = NULL;
	int vfio_container_fd;

	ret = rte_vhost_get_mem_table(internal->vid, &mem);
	if (ret < 0) {
		DRV_LOG(ERR, "failed to get VM memory layout.");
		goto exit;
	}

	vfio_container_fd = internal->vfio_container_fd;

	for (i = 0; i < mem->nregions; i++) {
		struct rte_vhost_mem_region *reg;

		reg = &mem->regions[i];
		DRV_LOG(INFO, "%s, region %u: HVA 0x%" PRIx64 ", "
			"GPA 0x%" PRIx64 ", size 0x%" PRIx64 ".",
			do_map ? "DMA map" : "DMA unmap", i,
			reg->host_user_addr, reg->guest_phys_addr, reg->size);

		if (do_map) {
			ret = rte_vfio_container_dma_map(vfio_container_fd,
				reg->host_user_addr, reg->guest_phys_addr,
				reg->size);
			if (ret < 0) {
				DRV_LOG(ERR, "DMA map failed.");
				goto exit;
			}
		} else {
			ret = rte_vfio_container_dma_unmap(vfio_container_fd,
				reg->host_user_addr, reg->guest_phys_addr,
				reg->size);
			if (ret < 0) {
				DRV_LOG(ERR, "DMA unmap failed.");
				goto exit;
			}
		}
	}

exit:
	if (mem)
		free(mem);
	return ret;
}

static uint64_t
qva_to_gpa(int vid, uint64_t qva)
{
	struct rte_vhost_memory *mem = NULL;
	struct rte_vhost_mem_region *reg;
	uint32_t i;
	uint64_t gpa = 0;

	if (rte_vhost_get_mem_table(vid, &mem) < 0)
		goto exit;

	for (i = 0; i < mem->nregions; i++) {
		reg = &mem->regions[i];

		if (qva >= reg->host_user_addr &&
				qva < reg->host_user_addr + reg->size) {
			gpa = qva - reg->host_user_addr + reg->guest_phys_addr;
			break;
		}
	}

exit:
	if (mem)
		free(mem);
	return gpa;
}

static int
vdpa_ifcvf_start(struct ifcvf_internal *internal)
{
	struct ifcvf_hw *hw = &internal->hw;
	int i, nr_vring;
	int vid;
	struct rte_vhost_vring vq;
	uint64_t gpa;

	vid = internal->vid;
	nr_vring = rte_vhost_get_vring_num(vid);
	rte_vhost_get_negotiated_features(vid, &hw->req_features);

	for (i = 0; i < nr_vring; i++) {
		rte_vhost_get_vhost_vring(vid, i, &vq);
		gpa = qva_to_gpa(vid, (uint64_t)(uintptr_t)vq.desc);
		if (gpa == 0) {
			DRV_LOG(ERR, "Fail to get GPA for descriptor ring.");
			return -1;
		}
		hw->vring[i].desc = gpa;

		gpa = qva_to_gpa(vid, (uint64_t)(uintptr_t)vq.avail);
		if (gpa == 0) {
			DRV_LOG(ERR, "Fail to get GPA for available ring.");
			return -1;
		}
		hw->vring[i].avail = gpa;

		gpa = qva_to_gpa(vid, (uint64_t)(uintptr_t)vq.used);
		if (gpa == 0) {
			DRV_LOG(ERR, "Fail to get GPA for used ring.");
			return -1;
		}
		hw->vring[i].used = gpa;

		hw->vring[i].size = vq.size;
		rte_vhost_get_vring_base(vid, i, &hw->vring[i].last_avail_idx,
				&hw->vring[i].last_used_idx);
	}
	hw->nr_vring = i;

	return ifcvf_start_hw(&internal->hw);
}

static void
vdpa_ifcvf_stop(struct ifcvf_internal *internal)
{
	struct ifcvf_hw *hw = &internal->hw;
	uint32_t i;
	int vid;

	vid = internal->vid;
	ifcvf_stop_hw(hw);

	for (i = 0; i < hw->nr_vring; i++)
		rte_vhost_set_vring_base(vid, i, hw->vring[i].last_avail_idx,
				hw->vring[i].last_used_idx);
}

#define MSIX_IRQ_SET_BUF_LEN (sizeof(struct vfio_irq_set) + \
		sizeof(int) * (IFCVF_MAX_QUEUES * 2 + 1))
static int
vdpa_enable_vfio_intr(struct ifcvf_internal *internal)
{
	int ret;
	uint32_t i, nr_vring;
	char irq_set_buf[MSIX_IRQ_SET_BUF_LEN];
	struct vfio_irq_set *irq_set;
	int *fd_ptr;
	struct rte_vhost_vring vring;

	nr_vring = rte_vhost_get_vring_num(internal->vid);

	irq_set = (struct vfio_irq_set *)irq_set_buf;
	irq_set->argsz = sizeof(irq_set_buf);
	irq_set->count = nr_vring + 1;
	irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
			 VFIO_IRQ_SET_ACTION_TRIGGER;
	irq_set->index = VFIO_PCI_MSIX_IRQ_INDEX;
	irq_set->start = 0;
	fd_ptr = (int *)&irq_set->data;
	fd_ptr[RTE_INTR_VEC_ZERO_OFFSET] = internal->pdev->intr_handle.fd;

	for (i = 0; i < nr_vring; i++) {
		rte_vhost_get_vhost_vring(internal->vid, i, &vring);
		fd_ptr[RTE_INTR_VEC_RXTX_OFFSET + i] = vring.callfd;
	}

	ret = ioctl(internal->vfio_dev_fd, VFIO_DEVICE_SET_IRQS, irq_set);
	if (ret) {
		DRV_LOG(ERR, "Error enabling MSI-X interrupts: %s",
				strerror(errno));
		return -1;
	}

	return 0;
}

static int
vdpa_disable_vfio_intr(struct ifcvf_internal *internal)
{
	int ret;
	char irq_set_buf[MSIX_IRQ_SET_BUF_LEN];
	struct vfio_irq_set *irq_set;

	irq_set = (struct vfio_irq_set *)irq_set_buf;
	irq_set->argsz = sizeof(irq_set_buf);
	irq_set->count = 0;
	irq_set->flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_TRIGGER;
	irq_set->index = VFIO_PCI_MSIX_IRQ_INDEX;
	irq_set->start = 0;

	ret = ioctl(internal->vfio_dev_fd, VFIO_DEVICE_SET_IRQS, irq_set);
	if (ret) {
		DRV_LOG(ERR, "Error disabling MSI-X interrupts: %s",
				strerror(errno));
		return -1;
	}

	return 0;
}

static void *
notify_relay(void *arg)
{
	int i, kickfd, epfd, nfds = 0;
	uint32_t qid, q_num;
	struct epoll_event events[IFCVF_MAX_QUEUES * 2];
	struct epoll_event ev;
	uint64_t buf;
	int nbytes;
	struct rte_vhost_vring vring;
	struct ifcvf_internal *internal = (struct ifcvf_internal *)arg;
	struct ifcvf_hw *hw = &internal->hw;

	q_num = rte_vhost_get_vring_num(internal->vid);

	epfd = epoll_create(IFCVF_MAX_QUEUES * 2);
	if (epfd < 0) {
		DRV_LOG(ERR, "failed to create epoll instance.");
		return NULL;
	}
	internal->epfd = epfd;

	for (qid = 0; qid < q_num; qid++) {
		ev.events = EPOLLIN | EPOLLPRI;
		rte_vhost_get_vhost_vring(internal->vid, qid, &vring);
		ev.data.u64 = qid | (uint64_t)vring.kickfd << 32;
		if (epoll_ctl(epfd, EPOLL_CTL_ADD, vring.kickfd, &ev) < 0) {
			DRV_LOG(ERR, "epoll add error: %s", strerror(errno));
			return NULL;
		}
	}

	for (;;) {
		nfds = epoll_wait(epfd, events, q_num, -1);
		if (nfds < 0) {
			if (errno == EINTR)
				continue;
			DRV_LOG(ERR, "epoll_wait return fail\n");
			return NULL;
		}

		for (i = 0; i < nfds; i++) {
			qid = events[i].data.u32;
			kickfd = (uint32_t)(events[i].data.u64 >> 32);
			do {
				nbytes = read(kickfd, &buf, 8);
				if (nbytes < 0) {
					if (errno == EINTR ||
					    errno == EWOULDBLOCK ||
					    errno == EAGAIN)
						continue;
					DRV_LOG(INFO, "Error reading "
						"kickfd: %s",
						strerror(errno));
				}
				break;
			} while (1);

			ifcvf_notify_queue(hw, qid);
		}
	}

	return NULL;
}

static int
setup_notify_relay(struct ifcvf_internal *internal)
{
	int ret;

	ret = pthread_create(&internal->tid, NULL, notify_relay,
			(void *)internal);
	if (ret) {
		DRV_LOG(ERR, "failed to create notify relay pthread.");
		return -1;
	}
	return 0;
}

static int
unset_notify_relay(struct ifcvf_internal *internal)
{
	void *status;

	if (internal->tid) {
		pthread_cancel(internal->tid);
		pthread_join(internal->tid, &status);
	}
	internal->tid = 0;

	if (internal->epfd >= 0)
		close(internal->epfd);
	internal->epfd = -1;

	return 0;
}

static int
update_datapath(struct ifcvf_internal *internal)
{
	int ret;

	rte_spinlock_lock(&internal->lock);

	if (!rte_atomic32_read(&internal->running) &&
	    (rte_atomic32_read(&internal->started) &&
	     rte_atomic32_read(&internal->dev_attached))) {
		ret = ifcvf_dma_map(internal, 1);
		if (ret)
			goto err;

		ret = vdpa_enable_vfio_intr(internal);
		if (ret)
			goto err;

		ret = setup_notify_relay(internal);
		if (ret)
			goto err;

		ret = vdpa_ifcvf_start(internal);
		if (ret)
			goto err;

		rte_atomic32_set(&internal->running, 1);
	} else if (rte_atomic32_read(&internal->running) &&
		   (!rte_atomic32_read(&internal->started) ||
		    !rte_atomic32_read(&internal->dev_attached))) {
		vdpa_ifcvf_stop(internal);

		ret = unset_notify_relay(internal);
		if (ret)
			goto err;

		ret = vdpa_disable_vfio_intr(internal);
		if (ret)
			goto err;

		ret = ifcvf_dma_map(internal, 0);
		if (ret)
			goto err;

		rte_atomic32_set(&internal->running, 0);
	}

	rte_spinlock_unlock(&internal->lock);
	return 0;
err:
	rte_spinlock_unlock(&internal->lock);
	return ret;
}

static int
ifcvf_dev_config(int vid)
{
	int did;
	struct internal_list *list;
	struct ifcvf_internal *internal;

	did = rte_vhost_get_vdpa_device_id(vid);
	list = find_internal_resource_by_did(did);
	if (list == NULL) {
		DRV_LOG(ERR, "Invalid device id: %d", did);
		return -1;
	}

	internal = list->internal;
	internal->vid = vid;
	rte_atomic32_set(&internal->dev_attached, 1);
	update_datapath(internal);

	return 0;
}

static int
ifcvf_dev_close(int vid)
{
	int did;
	struct internal_list *list;
	struct ifcvf_internal *internal;

	did = rte_vhost_get_vdpa_device_id(vid);
	list = find_internal_resource_by_did(did);
	if (list == NULL) {
		DRV_LOG(ERR, "Invalid device id: %d", did);
		return -1;
	}

	internal = list->internal;
	rte_atomic32_set(&internal->dev_attached, 0);
	update_datapath(internal);

	return 0;
}

static int
ifcvf_get_vfio_group_fd(int vid)
{
	int did;
	struct internal_list *list;

	did = rte_vhost_get_vdpa_device_id(vid);
	list = find_internal_resource_by_did(did);
	if (list == NULL) {
		DRV_LOG(ERR, "Invalid device id: %d", did);
		return -1;
	}

	return list->internal->vfio_group_fd;
}

static int
ifcvf_get_vfio_device_fd(int vid)
{
	int did;
	struct internal_list *list;

	did = rte_vhost_get_vdpa_device_id(vid);
	list = find_internal_resource_by_did(did);
	if (list == NULL) {
		DRV_LOG(ERR, "Invalid device id: %d", did);
		return -1;
	}

	return list->internal->vfio_dev_fd;
}

static int
ifcvf_get_notify_area(int vid, int qid, uint64_t *offset, uint64_t *size)
{
	int did;
	struct internal_list *list;
	struct ifcvf_internal *internal;
	struct vfio_region_info reg = { .argsz = sizeof(reg) };
	int ret;

	did = rte_vhost_get_vdpa_device_id(vid);
	list = find_internal_resource_by_did(did);
	if (list == NULL) {
		DRV_LOG(ERR, "Invalid device id: %d", did);
		return -1;
	}

	internal = list->internal;

	reg.index = ifcvf_get_notify_region(&internal->hw);
	ret = ioctl(internal->vfio_dev_fd, VFIO_DEVICE_GET_REGION_INFO, &reg);
	if (ret) {
		DRV_LOG(ERR, "Get not get device region info: %s",
				strerror(errno));
		return -1;
	}

	*offset = ifcvf_get_queue_notify_off(&internal->hw, qid) + reg.offset;
	*size = 0x1000;

	return 0;
}

static int
ifcvf_get_queue_num(int did, uint32_t *queue_num)
{
	struct internal_list *list;

	list = find_internal_resource_by_did(did);
	if (list == NULL) {
		DRV_LOG(ERR, "Invalid device id: %d", did);
		return -1;
	}

	*queue_num = list->internal->max_queues;

	return 0;
}

static int
ifcvf_get_vdpa_features(int did, uint64_t *features)
{
	struct internal_list *list;

	list = find_internal_resource_by_did(did);
	if (list == NULL) {
		DRV_LOG(ERR, "Invalid device id: %d", did);
		return -1;
	}

	*features = list->internal->features;

	return 0;
}

#define VDPA_SUPPORTED_PROTOCOL_FEATURES \
		(1ULL << VHOST_USER_PROTOCOL_F_REPLY_ACK | \
		 1ULL << VHOST_USER_PROTOCOL_F_SLAVE_REQ | \
		 1ULL << VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD | \
		 1ULL << VHOST_USER_PROTOCOL_F_HOST_NOTIFIER | \
		 1ULL << VHOST_USER_PROTOCOL_F_LOG_SHMFD)
static int
ifcvf_get_protocol_features(int did __rte_unused, uint64_t *features)
{
	*features = VDPA_SUPPORTED_PROTOCOL_FEATURES;
	return 0;
}

struct rte_vdpa_dev_ops ifcvf_ops = {
	.get_queue_num = ifcvf_get_queue_num,
	.get_features = ifcvf_get_vdpa_features,
	.get_protocol_features = ifcvf_get_protocol_features,
	.dev_conf = ifcvf_dev_config,
	.dev_close = ifcvf_dev_close,
	.set_vring_state = NULL,
	.set_features = NULL,
	.migration_done = NULL,
	.get_vfio_group_fd = ifcvf_get_vfio_group_fd,
	.get_vfio_device_fd = ifcvf_get_vfio_device_fd,
	.get_notify_area = ifcvf_get_notify_area,
};

static int
ifcvf_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
		struct rte_pci_device *pci_dev)
{
	uint64_t features;
	struct ifcvf_internal *internal = NULL;
	struct internal_list *list = NULL;

	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
		return 0;

	list = rte_zmalloc("ifcvf", sizeof(*list), 0);
	if (list == NULL)
		goto error;

	internal = rte_zmalloc("ifcvf", sizeof(*internal), 0);
	if (internal == NULL)
		goto error;

	internal->pdev = pci_dev;
	rte_spinlock_init(&internal->lock);
	if (ifcvf_vfio_setup(internal) < 0)
		return -1;

	internal->max_queues = IFCVF_MAX_QUEUES;
	features = ifcvf_get_features(&internal->hw);
	internal->features = (features &
		~(1ULL << VIRTIO_F_IOMMU_PLATFORM)) |
		(1ULL << VHOST_USER_F_PROTOCOL_FEATURES);

	internal->dev_addr.pci_addr = pci_dev->addr;
	internal->dev_addr.type = PCI_ADDR;
	list->internal = internal;

	pthread_mutex_lock(&internal_list_lock);
	TAILQ_INSERT_TAIL(&internal_list, list, next);
	pthread_mutex_unlock(&internal_list_lock);

	internal->did = rte_vdpa_register_device(&internal->dev_addr,
				&ifcvf_ops);
	if (internal->did < 0)
		goto error;

	rte_atomic32_set(&internal->started, 1);
	update_datapath(internal);

	return 0;

error:
	rte_free(list);
	rte_free(internal);
	return -1;
}

static int
ifcvf_pci_remove(struct rte_pci_device *pci_dev)
{
	struct ifcvf_internal *internal;
	struct internal_list *list;

	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
		return 0;

	list = find_internal_resource_by_dev(pci_dev);
	if (list == NULL) {
		DRV_LOG(ERR, "Invalid device: %s", pci_dev->name);
		return -1;
	}

	internal = list->internal;
	rte_atomic32_set(&internal->started, 0);
	update_datapath(internal);

	rte_pci_unmap_device(internal->pdev);
	rte_vfio_container_destroy(internal->vfio_container_fd);
	rte_vdpa_unregister_device(internal->did);

	pthread_mutex_lock(&internal_list_lock);
	TAILQ_REMOVE(&internal_list, list, next);
	pthread_mutex_unlock(&internal_list_lock);

	rte_free(list);
	rte_free(internal);

	return 0;
}

/*
 * IFCVF has the same vendor ID and device ID as virtio net PCI
 * device, with its specific subsystem vendor ID and device ID.
 */
static const struct rte_pci_id pci_id_ifcvf_map[] = {
	{ .class_id = RTE_CLASS_ANY_ID,
	  .vendor_id = IFCVF_VENDOR_ID,
	  .device_id = IFCVF_DEVICE_ID,
	  .subsystem_vendor_id = IFCVF_SUBSYS_VENDOR_ID,
	  .subsystem_device_id = IFCVF_SUBSYS_DEVICE_ID,
	},

	{ .vendor_id = 0, /* sentinel */
	},
};

static struct rte_pci_driver rte_ifcvf_vdpa = {
	.id_table = pci_id_ifcvf_map,
	.drv_flags = 0,
	.probe = ifcvf_pci_probe,
	.remove = ifcvf_pci_remove,
};

RTE_PMD_REGISTER_PCI(net_ifcvf, rte_ifcvf_vdpa);
RTE_PMD_REGISTER_PCI_TABLE(net_ifcvf, pci_id_ifcvf_map);
RTE_PMD_REGISTER_KMOD_DEP(net_ifcvf, "* vfio-pci");

RTE_INIT(ifcvf_vdpa_init_log)
{
	ifcvf_vdpa_logtype = rte_log_register("pmd.net.ifcvf_vdpa");
	if (ifcvf_vdpa_logtype >= 0)
		rte_log_set_level(ifcvf_vdpa_logtype, RTE_LOG_NOTICE);
}