summaryrefslogtreecommitdiffstats
path: root/drivers/net/ethernet/netronome/nfp/flower/lag_conf.c
blob: c6a2c302a8c8b7811327c1f07e96e80f9807a12f (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
// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
/* Copyright (C) 2018 Netronome Systems, Inc. */

#include "main.h"

/* LAG group config flags. */
#define NFP_FL_LAG_LAST			BIT(1)
#define NFP_FL_LAG_FIRST		BIT(2)
#define NFP_FL_LAG_DATA			BIT(3)
#define NFP_FL_LAG_XON			BIT(4)
#define NFP_FL_LAG_SYNC			BIT(5)
#define NFP_FL_LAG_SWITCH		BIT(6)
#define NFP_FL_LAG_RESET		BIT(7)

/* LAG port state flags. */
#define NFP_PORT_LAG_LINK_UP		BIT(0)
#define NFP_PORT_LAG_TX_ENABLED		BIT(1)
#define NFP_PORT_LAG_CHANGED		BIT(2)

enum nfp_fl_lag_batch {
	NFP_FL_LAG_BATCH_FIRST,
	NFP_FL_LAG_BATCH_MEMBER,
	NFP_FL_LAG_BATCH_FINISHED
};

/**
 * struct nfp_flower_cmsg_lag_config - control message payload for LAG config
 * @ctrl_flags:	Configuration flags
 * @reserved:	Reserved for future use
 * @ttl:	Time to live of packet - host always sets to 0xff
 * @pkt_number:	Config message packet number - increment for each message
 * @batch_ver:	Batch version of messages - increment for each batch of messages
 * @group_id:	Group ID applicable
 * @group_inst:	Group instance number - increment when group is reused
 * @members:	Array of 32-bit words listing all active group members
 */
struct nfp_flower_cmsg_lag_config {
	u8 ctrl_flags;
	u8 reserved[2];
	u8 ttl;
	__be32 pkt_number;
	__be32 batch_ver;
	__be32 group_id;
	__be32 group_inst;
	__be32 members[];
};

/**
 * struct nfp_fl_lag_group - list entry for each LAG group
 * @group_id:		Assigned group ID for host/kernel sync
 * @group_inst:		Group instance in case of ID reuse
 * @list:		List entry
 * @master_ndev:	Group master Netdev
 * @dirty:		Marked if the group needs synced to HW
 * @offloaded:		Marked if the group is currently offloaded to NIC
 * @to_remove:		Marked if the group should be removed from NIC
 * @to_destroy:		Marked if the group should be removed from driver
 * @slave_cnt:		Number of slaves in group
 */
struct nfp_fl_lag_group {
	unsigned int group_id;
	u8 group_inst;
	struct list_head list;
	struct net_device *master_ndev;
	bool dirty;
	bool offloaded;
	bool to_remove;
	bool to_destroy;
	unsigned int slave_cnt;
};

#define NFP_FL_LAG_PKT_NUMBER_MASK	GENMASK(30, 0)
#define NFP_FL_LAG_VERSION_MASK		GENMASK(22, 0)
#define NFP_FL_LAG_HOST_TTL		0xff

/* Use this ID with zero members to ack a batch config */
#define NFP_FL_LAG_SYNC_ID		0
#define NFP_FL_LAG_GROUP_MIN		1 /* ID 0 reserved */
#define NFP_FL_LAG_GROUP_MAX		32 /* IDs 1 to 31 are valid */

/* wait for more config */
#define NFP_FL_LAG_DELAY		(msecs_to_jiffies(2))

#define NFP_FL_LAG_RETRANS_LIMIT	100 /* max retrans cmsgs to store */

static unsigned int nfp_fl_get_next_pkt_number(struct nfp_fl_lag *lag)
{
	lag->pkt_num++;
	lag->pkt_num &= NFP_FL_LAG_PKT_NUMBER_MASK;

	return lag->pkt_num;
}

static void nfp_fl_increment_version(struct nfp_fl_lag *lag)
{
	/* LSB is not considered by firmware so add 2 for each increment. */
	lag->batch_ver += 2;
	lag->batch_ver &= NFP_FL_LAG_VERSION_MASK;

	/* Zero is reserved by firmware. */
	if (!lag->batch_ver)
		lag->batch_ver += 2;
}

static struct nfp_fl_lag_group *
nfp_fl_lag_group_create(struct nfp_fl_lag *lag, struct net_device *master)
{
	struct nfp_fl_lag_group *group;
	struct nfp_flower_priv *priv;
	int id;

	priv = container_of(lag, struct nfp_flower_priv, nfp_lag);

	id = ida_simple_get(&lag->ida_handle, NFP_FL_LAG_GROUP_MIN,
			    NFP_FL_LAG_GROUP_MAX, GFP_KERNEL);
	if (id < 0) {
		nfp_flower_cmsg_warn(priv->app,
				     "No more bonding groups available\n");
		return ERR_PTR(id);
	}

	group = kmalloc(sizeof(*group), GFP_KERNEL);
	if (!group) {
		ida_simple_remove(&lag->ida_handle, id);
		return ERR_PTR(-ENOMEM);
	}

	group->group_id = id;
	group->master_ndev = master;
	group->dirty = true;
	group->offloaded = false;
	group->to_remove = false;
	group->to_destroy = false;
	group->slave_cnt = 0;
	group->group_inst = ++lag->global_inst;
	list_add_tail(&group->list, &lag->group_list);

	return group;
}

static struct nfp_fl_lag_group *
nfp_fl_lag_find_group_for_master_with_lag(struct nfp_fl_lag *lag,
					  struct net_device *master)
{
	struct nfp_fl_lag_group *entry;

	if (!master)
		return NULL;

	list_for_each_entry(entry, &lag->group_list, list)
		if (entry->master_ndev == master)
			return entry;

	return NULL;
}

int nfp_flower_lag_populate_pre_action(struct nfp_app *app,
				       struct net_device *master,
				       struct nfp_fl_pre_lag *pre_act,
				       struct netlink_ext_ack *extack)
{
	struct nfp_flower_priv *priv = app->priv;
	struct nfp_fl_lag_group *group = NULL;
	__be32 temp_vers;

	mutex_lock(&priv->nfp_lag.lock);
	group = nfp_fl_lag_find_group_for_master_with_lag(&priv->nfp_lag,
							  master);
	if (!group) {
		mutex_unlock(&priv->nfp_lag.lock);
		NL_SET_ERR_MSG_MOD(extack, "invalid entry: group does not exist for LAG action");
		return -ENOENT;
	}

	pre_act->group_id = cpu_to_be16(group->group_id);
	temp_vers = cpu_to_be32(priv->nfp_lag.batch_ver <<
				NFP_FL_PRE_LAG_VER_OFF);
	memcpy(pre_act->lag_version, &temp_vers, 3);
	pre_act->instance = group->group_inst;
	mutex_unlock(&priv->nfp_lag.lock);

	return 0;
}

int nfp_flower_lag_get_output_id(struct nfp_app *app, struct net_device *master)
{
	struct nfp_flower_priv *priv = app->priv;
	struct nfp_fl_lag_group *group = NULL;
	int group_id = -ENOENT;

	mutex_lock(&priv->nfp_lag.lock);
	group = nfp_fl_lag_find_group_for_master_with_lag(&priv->nfp_lag,
							  master);
	if (group)
		group_id = group->group_id;
	mutex_unlock(&priv->nfp_lag.lock);

	return group_id;
}

static int
nfp_fl_lag_config_group(struct nfp_fl_lag *lag, struct nfp_fl_lag_group *group,
			struct net_device **active_members,
			unsigned int member_cnt, enum nfp_fl_lag_batch *batch)
{
	struct nfp_flower_cmsg_lag_config *cmsg_payload;
	struct nfp_flower_priv *priv;
	unsigned long int flags;
	unsigned int size, i;
	struct sk_buff *skb;

	priv = container_of(lag, struct nfp_flower_priv, nfp_lag);
	size = sizeof(*cmsg_payload) + sizeof(__be32) * member_cnt;
	skb = nfp_flower_cmsg_alloc(priv->app, size,
				    NFP_FLOWER_CMSG_TYPE_LAG_CONFIG,
				    GFP_KERNEL);
	if (!skb)
		return -ENOMEM;

	cmsg_payload = nfp_flower_cmsg_get_data(skb);
	flags = 0;

	/* Increment batch version for each new batch of config messages. */
	if (*batch == NFP_FL_LAG_BATCH_FIRST) {
		flags |= NFP_FL_LAG_FIRST;
		nfp_fl_increment_version(lag);
		*batch = NFP_FL_LAG_BATCH_MEMBER;
	}

	/* If it is a reset msg then it is also the end of the batch. */
	if (lag->rst_cfg) {
		flags |= NFP_FL_LAG_RESET;
		*batch = NFP_FL_LAG_BATCH_FINISHED;
	}

	/* To signal the end of a batch, both the switch and last flags are set
	 * and the reserved SYNC group ID is used.
	 */
	if (*batch == NFP_FL_LAG_BATCH_FINISHED) {
		flags |= NFP_FL_LAG_SWITCH | NFP_FL_LAG_LAST;
		lag->rst_cfg = false;
		cmsg_payload->group_id = cpu_to_be32(NFP_FL_LAG_SYNC_ID);
		cmsg_payload->group_inst = 0;
	} else {
		cmsg_payload->group_id = cpu_to_be32(group->group_id);
		cmsg_payload->group_inst = cpu_to_be32(group->group_inst);
	}

	cmsg_payload->reserved[0] = 0;
	cmsg_payload->reserved[1] = 0;
	cmsg_payload->ttl = NFP_FL_LAG_HOST_TTL;
	cmsg_payload->ctrl_flags = flags;
	cmsg_payload->batch_ver = cpu_to_be32(lag->batch_ver);
	cmsg_payload->pkt_number = cpu_to_be32(nfp_fl_get_next_pkt_number(lag));

	for (i = 0; i < member_cnt; i++)
		cmsg_payload->members[i] =
			cpu_to_be32(nfp_repr_get_port_id(active_members[i]));

	nfp_ctrl_tx(priv->app->ctrl, skb);
	return 0;
}

static void nfp_fl_lag_do_work(struct work_struct *work)
{
	enum nfp_fl_lag_batch batch = NFP_FL_LAG_BATCH_FIRST;
	struct nfp_fl_lag_group *entry, *storage;
	struct delayed_work *delayed_work;
	struct nfp_flower_priv *priv;
	struct nfp_fl_lag *lag;
	int err;

	delayed_work = to_delayed_work(work);
	lag = container_of(delayed_work, struct nfp_fl_lag, work);
	priv = container_of(lag, struct nfp_flower_priv, nfp_lag);

	mutex_lock(&lag->lock);
	list_for_each_entry_safe(entry, storage, &lag->group_list, list) {
		struct net_device *iter_netdev, **acti_netdevs;
		struct nfp_flower_repr_priv *repr_priv;
		int active_count = 0, slaves = 0;
		struct nfp_repr *repr;
		unsigned long *flags;

		if (entry->to_remove) {
			/* Active count of 0 deletes group on hw. */
			err = nfp_fl_lag_config_group(lag, entry, NULL, 0,
						      &batch);
			if (!err) {
				entry->to_remove = false;
				entry->offloaded = false;
			} else {
				nfp_flower_cmsg_warn(priv->app,
						     "group delete failed\n");
				schedule_delayed_work(&lag->work,
						      NFP_FL_LAG_DELAY);
				continue;
			}

			if (entry->to_destroy) {
				ida_simple_remove(&lag->ida_handle,
						  entry->group_id);
				list_del(&entry->list);
				kfree(entry);
			}
			continue;
		}

		acti_netdevs = kmalloc_array(entry->slave_cnt,
					     sizeof(*acti_netdevs), GFP_KERNEL);
		if (!acti_netdevs) {
			schedule_delayed_work(&lag->work,
					      NFP_FL_LAG_DELAY);
			continue;
		}

		/* Include sanity check in the loop. It may be that a bond has
		 * changed between processing the last notification and the
		 * work queue triggering. If the number of slaves has changed
		 * or it now contains netdevs that cannot be offloaded, ignore
		 * the group until pending notifications are processed.
		 */
		rcu_read_lock();
		for_each_netdev_in_bond_rcu(entry->master_ndev, iter_netdev) {
			if (!nfp_netdev_is_nfp_repr(iter_netdev)) {
				slaves = 0;
				break;
			}

			repr = netdev_priv(iter_netdev);

			if (repr->app != priv->app) {
				slaves = 0;
				break;
			}

			slaves++;
			if (slaves > entry->slave_cnt)
				break;

			/* Check the ports for state changes. */
			repr_priv = repr->app_priv;
			flags = &repr_priv->lag_port_flags;

			if (*flags & NFP_PORT_LAG_CHANGED) {
				*flags &= ~NFP_PORT_LAG_CHANGED;
				entry->dirty = true;
			}

			if ((*flags & NFP_PORT_LAG_TX_ENABLED) &&
			    (*flags & NFP_PORT_LAG_LINK_UP))
				acti_netdevs[active_count++] = iter_netdev;
		}
		rcu_read_unlock();

		if (slaves != entry->slave_cnt || !entry->dirty) {
			kfree(acti_netdevs);
			continue;
		}

		err = nfp_fl_lag_config_group(lag, entry, acti_netdevs,
					      active_count, &batch);
		if (!err) {
			entry->offloaded = true;
			entry->dirty = false;
		} else {
			nfp_flower_cmsg_warn(priv->app,
					     "group offload failed\n");
			schedule_delayed_work(&lag->work, NFP_FL_LAG_DELAY);
		}

		kfree(acti_netdevs);
	}

	/* End the config batch if at least one packet has been batched. */
	if (batch == NFP_FL_LAG_BATCH_MEMBER) {
		batch = NFP_FL_LAG_BATCH_FINISHED;
		err = nfp_fl_lag_config_group(lag, NULL, NULL, 0, &batch);
		if (err)
			nfp_flower_cmsg_warn(priv->app,
					     "group batch end cmsg failed\n");
	}

	mutex_unlock(&lag->lock);
}

static int
nfp_fl_lag_put_unprocessed(struct nfp_fl_lag *lag, struct sk_buff *skb)
{
	struct nfp_flower_cmsg_lag_config *cmsg_payload;

	cmsg_payload = nfp_flower_cmsg_get_data(skb);
	if (be32_to_cpu(cmsg_payload->group_id) >= NFP_FL_LAG_GROUP_MAX)
		return -EINVAL;

	/* Drop cmsg retrans if storage limit is exceeded to prevent
	 * overloading. If the fw notices that expected messages have not been
	 * received in a given time block, it will request a full resync.
	 */
	if (skb_queue_len(&lag->retrans_skbs) >= NFP_FL_LAG_RETRANS_LIMIT)
		return -ENOSPC;

	__skb_queue_tail(&lag->retrans_skbs, skb);

	return 0;
}

static void nfp_fl_send_unprocessed(struct nfp_fl_lag *lag)
{
	struct nfp_flower_priv *priv;
	struct sk_buff *skb;

	priv = container_of(lag, struct nfp_flower_priv, nfp_lag);

	while ((skb = __skb_dequeue(&lag->retrans_skbs)))
		nfp_ctrl_tx(priv->app->ctrl, skb);
}

bool nfp_flower_lag_unprocessed_msg(struct nfp_app *app, struct sk_buff *skb)
{
	struct nfp_flower_cmsg_lag_config *cmsg_payload;
	struct nfp_flower_priv *priv = app->priv;
	struct nfp_fl_lag_group *group_entry;
	unsigned long int flags;
	bool store_skb = false;
	int err;

	cmsg_payload = nfp_flower_cmsg_get_data(skb);
	flags = cmsg_payload->ctrl_flags;

	/* Note the intentional fall through below. If DATA and XON are both
	 * set, the message will stored and sent again with the rest of the
	 * unprocessed messages list.
	 */

	/* Store */
	if (flags & NFP_FL_LAG_DATA)
		if (!nfp_fl_lag_put_unprocessed(&priv->nfp_lag, skb))
			store_skb = true;

	/* Send stored */
	if (flags & NFP_FL_LAG_XON)
		nfp_fl_send_unprocessed(&priv->nfp_lag);

	/* Resend all */
	if (flags & NFP_FL_LAG_SYNC) {
		/* To resend all config:
		 * 1) Clear all unprocessed messages
		 * 2) Mark all groups dirty
		 * 3) Reset NFP group config
		 * 4) Schedule a LAG config update
		 */

		__skb_queue_purge(&priv->nfp_lag.retrans_skbs);

		mutex_lock(&priv->nfp_lag.lock);
		list_for_each_entry(group_entry, &priv->nfp_lag.group_list,
				    list)
			group_entry->dirty = true;

		err = nfp_flower_lag_reset(&priv->nfp_lag);
		if (err)
			nfp_flower_cmsg_warn(priv->app,
					     "mem err in group reset msg\n");
		mutex_unlock(&priv->nfp_lag.lock);

		schedule_delayed_work(&priv->nfp_lag.work, 0);
	}

	return store_skb;
}

static void
nfp_fl_lag_schedule_group_remove(struct nfp_fl_lag *lag,
				 struct nfp_fl_lag_group *group)
{
	group->to_remove = true;

	schedule_delayed_work(&lag->work, NFP_FL_LAG_DELAY);
}

static void
nfp_fl_lag_schedule_group_delete(struct nfp_fl_lag *lag,
				 struct net_device *master)
{
	struct nfp_fl_lag_group *group;
	struct nfp_flower_priv *priv;

	priv = container_of(lag, struct nfp_flower_priv, nfp_lag);

	if (!netif_is_bond_master(master))
		return;

	mutex_lock(&lag->lock);
	group = nfp_fl_lag_find_group_for_master_with_lag(lag, master);
	if (!group) {
		mutex_unlock(&lag->lock);
		nfp_warn(priv->app->cpp, "untracked bond got unregistered %s\n",
			 netdev_name(master));
		return;
	}

	group->to_remove = true;
	group->to_destroy = true;
	mutex_unlock(&lag->lock);

	schedule_delayed_work(&lag->work, NFP_FL_LAG_DELAY);
}

static int
nfp_fl_lag_changeupper_event(struct nfp_fl_lag *lag,
			     struct netdev_notifier_changeupper_info *info)
{
	struct net_device *upper = info->upper_dev, *iter_netdev;
	struct netdev_lag_upper_info *lag_upper_info;
	struct nfp_fl_lag_group *group;
	struct nfp_flower_priv *priv;
	unsigned int slave_count = 0;
	bool can_offload = true;
	struct nfp_repr *repr;

	if (!netif_is_lag_master(upper))
		return 0;

	priv = container_of(lag, struct nfp_flower_priv, nfp_lag);

	rcu_read_lock();
	for_each_netdev_in_bond_rcu(upper, iter_netdev) {
		if (!nfp_netdev_is_nfp_repr(iter_netdev)) {
			can_offload = false;
			break;
		}
		repr = netdev_priv(iter_netdev);

		/* Ensure all ports are created by the same app/on same card. */
		if (repr->app != priv->app) {
			can_offload = false;
			break;
		}

		slave_count++;
	}
	rcu_read_unlock();

	lag_upper_info = info->upper_info;

	/* Firmware supports active/backup and L3/L4 hash bonds. */
	if (lag_upper_info &&
	    lag_upper_info->tx_type != NETDEV_LAG_TX_TYPE_ACTIVEBACKUP &&
	    (lag_upper_info->tx_type != NETDEV_LAG_TX_TYPE_HASH ||
	     (lag_upper_info->hash_type != NETDEV_LAG_HASH_L34 &&
	      lag_upper_info->hash_type != NETDEV_LAG_HASH_E34 &&
	      lag_upper_info->hash_type != NETDEV_LAG_HASH_UNKNOWN))) {
		can_offload = false;
		nfp_flower_cmsg_warn(priv->app,
				     "Unable to offload tx_type %u hash %u\n",
				     lag_upper_info->tx_type,
				     lag_upper_info->hash_type);
	}

	mutex_lock(&lag->lock);
	group = nfp_fl_lag_find_group_for_master_with_lag(lag, upper);

	if (slave_count == 0 || !can_offload) {
		/* Cannot offload the group - remove if previously offloaded. */
		if (group && group->offloaded)
			nfp_fl_lag_schedule_group_remove(lag, group);

		mutex_unlock(&lag->lock);
		return 0;
	}

	if (!group) {
		group = nfp_fl_lag_group_create(lag, upper);
		if (IS_ERR(group)) {
			mutex_unlock(&lag->lock);
			return PTR_ERR(group);
		}
	}

	group->dirty = true;
	group->slave_cnt = slave_count;

	/* Group may have been on queue for removal but is now offloadable. */
	group->to_remove = false;
	mutex_unlock(&lag->lock);

	schedule_delayed_work(&lag->work, NFP_FL_LAG_DELAY);
	return 0;
}

static void
nfp_fl_lag_changels_event(struct nfp_fl_lag *lag, struct net_device *netdev,
			  struct netdev_notifier_changelowerstate_info *info)
{
	struct netdev_lag_lower_state_info *lag_lower_info;
	struct nfp_flower_repr_priv *repr_priv;
	struct nfp_flower_priv *priv;
	struct nfp_repr *repr;
	unsigned long *flags;

	if (!netif_is_lag_port(netdev) || !nfp_netdev_is_nfp_repr(netdev))
		return;

	lag_lower_info = info->lower_state_info;
	if (!lag_lower_info)
		return;

	priv = container_of(lag, struct nfp_flower_priv, nfp_lag);
	repr = netdev_priv(netdev);

	/* Verify that the repr is associated with this app. */
	if (repr->app != priv->app)
		return;

	repr_priv = repr->app_priv;
	flags = &repr_priv->lag_port_flags;

	mutex_lock(&lag->lock);
	if (lag_lower_info->link_up)
		*flags |= NFP_PORT_LAG_LINK_UP;
	else
		*flags &= ~NFP_PORT_LAG_LINK_UP;

	if (lag_lower_info->tx_enabled)
		*flags |= NFP_PORT_LAG_TX_ENABLED;
	else
		*flags &= ~NFP_PORT_LAG_TX_ENABLED;

	*flags |= NFP_PORT_LAG_CHANGED;
	mutex_unlock(&lag->lock);

	schedule_delayed_work(&lag->work, NFP_FL_LAG_DELAY);
}

int nfp_flower_lag_netdev_event(struct nfp_flower_priv *priv,
				struct net_device *netdev,
				unsigned long event, void *ptr)
{
	struct nfp_fl_lag *lag = &priv->nfp_lag;
	int err;

	switch (event) {
	case NETDEV_CHANGEUPPER:
		err = nfp_fl_lag_changeupper_event(lag, ptr);
		if (err)
			return NOTIFY_BAD;
		return NOTIFY_OK;
	case NETDEV_CHANGELOWERSTATE:
		nfp_fl_lag_changels_event(lag, netdev, ptr);
		return NOTIFY_OK;
	case NETDEV_UNREGISTER:
		nfp_fl_lag_schedule_group_delete(lag, netdev);
		return NOTIFY_OK;
	}

	return NOTIFY_DONE;
}

int nfp_flower_lag_reset(struct nfp_fl_lag *lag)
{
	enum nfp_fl_lag_batch batch = NFP_FL_LAG_BATCH_FIRST;

	lag->rst_cfg = true;
	return nfp_fl_lag_config_group(lag, NULL, NULL, 0, &batch);
}

void nfp_flower_lag_init(struct nfp_fl_lag *lag)
{
	INIT_DELAYED_WORK(&lag->work, nfp_fl_lag_do_work);
	INIT_LIST_HEAD(&lag->group_list);
	mutex_init(&lag->lock);
	ida_init(&lag->ida_handle);

	__skb_queue_head_init(&lag->retrans_skbs);

	/* 0 is a reserved batch version so increment to first valid value. */
	nfp_fl_increment_version(lag);
}

void nfp_flower_lag_cleanup(struct nfp_fl_lag *lag)
{
	struct nfp_fl_lag_group *entry, *storage;

	cancel_delayed_work_sync(&lag->work);

	__skb_queue_purge(&lag->retrans_skbs);

	/* Remove all groups. */
	mutex_lock(&lag->lock);
	list_for_each_entry_safe(entry, storage, &lag->group_list, list) {
		list_del(&entry->list);
		kfree(entry);
	}
	mutex_unlock(&lag->lock);
	mutex_destroy(&lag->lock);
	ida_destroy(&lag->ida_handle);
}