summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.c
blob: d761a1235994cce50d15ffaf71e4ab669a9491f1 (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
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/* Copyright (c) 2017-2018 Mellanox Technologies. All rights reserved */

#include <net/ip_tunnels.h>
#include <net/ip6_tunnel.h>
#include <net/inet_ecn.h>

#include "spectrum_ipip.h"
#include "reg.h"

struct ip_tunnel_parm_kern
mlxsw_sp_ipip_netdev_parms4(const struct net_device *ol_dev)
{
	struct ip_tunnel *tun = netdev_priv(ol_dev);

	return tun->parms;
}

struct __ip6_tnl_parm
mlxsw_sp_ipip_netdev_parms6(const struct net_device *ol_dev)
{
	struct ip6_tnl *tun = netdev_priv(ol_dev);

	return tun->parms;
}

static bool
mlxsw_sp_ipip_parms4_has_ikey(const struct ip_tunnel_parm_kern *parms)
{
	return test_bit(IP_TUNNEL_KEY_BIT, parms->i_flags);
}

static bool mlxsw_sp_ipip_parms6_has_ikey(const struct __ip6_tnl_parm *parms)
{
	return test_bit(IP_TUNNEL_KEY_BIT, parms->i_flags);
}

static bool
mlxsw_sp_ipip_parms4_has_okey(const struct ip_tunnel_parm_kern *parms)
{
	return test_bit(IP_TUNNEL_KEY_BIT, parms->o_flags);
}

static bool mlxsw_sp_ipip_parms6_has_okey(const struct __ip6_tnl_parm *parms)
{
	return test_bit(IP_TUNNEL_KEY_BIT, parms->o_flags);
}

static u32 mlxsw_sp_ipip_parms4_ikey(const struct ip_tunnel_parm_kern *parms)
{
	return mlxsw_sp_ipip_parms4_has_ikey(parms) ?
		be32_to_cpu(parms->i_key) : 0;
}

static u32 mlxsw_sp_ipip_parms6_ikey(const struct __ip6_tnl_parm *parms)
{
	return mlxsw_sp_ipip_parms6_has_ikey(parms) ?
		be32_to_cpu(parms->i_key) : 0;
}

static u32 mlxsw_sp_ipip_parms4_okey(const struct ip_tunnel_parm_kern *parms)
{
	return mlxsw_sp_ipip_parms4_has_okey(parms) ?
		be32_to_cpu(parms->o_key) : 0;
}

static u32 mlxsw_sp_ipip_parms6_okey(const struct __ip6_tnl_parm *parms)
{
	return mlxsw_sp_ipip_parms6_has_okey(parms) ?
		be32_to_cpu(parms->o_key) : 0;
}

static union mlxsw_sp_l3addr
mlxsw_sp_ipip_parms4_saddr(const struct ip_tunnel_parm_kern *parms)
{
	return (union mlxsw_sp_l3addr) { .addr4 = parms->iph.saddr };
}

static union mlxsw_sp_l3addr
mlxsw_sp_ipip_parms6_saddr(const struct __ip6_tnl_parm *parms)
{
	return (union mlxsw_sp_l3addr) { .addr6 = parms->laddr };
}

static union mlxsw_sp_l3addr
mlxsw_sp_ipip_parms4_daddr(const struct ip_tunnel_parm_kern *parms)
{
	return (union mlxsw_sp_l3addr) { .addr4 = parms->iph.daddr };
}

static union mlxsw_sp_l3addr
mlxsw_sp_ipip_parms6_daddr(const struct __ip6_tnl_parm *parms)
{
	return (union mlxsw_sp_l3addr) { .addr6 = parms->raddr };
}

union mlxsw_sp_l3addr
mlxsw_sp_ipip_netdev_saddr(enum mlxsw_sp_l3proto proto,
			   const struct net_device *ol_dev)
{
	struct ip_tunnel_parm_kern parms4;
	struct __ip6_tnl_parm parms6;

	switch (proto) {
	case MLXSW_SP_L3_PROTO_IPV4:
		parms4 = mlxsw_sp_ipip_netdev_parms4(ol_dev);
		return mlxsw_sp_ipip_parms4_saddr(&parms4);
	case MLXSW_SP_L3_PROTO_IPV6:
		parms6 = mlxsw_sp_ipip_netdev_parms6(ol_dev);
		return mlxsw_sp_ipip_parms6_saddr(&parms6);
	}

	WARN_ON(1);
	return (union mlxsw_sp_l3addr) {0};
}

static __be32 mlxsw_sp_ipip_netdev_daddr4(const struct net_device *ol_dev)
{

	struct ip_tunnel_parm_kern parms4;

	parms4 = mlxsw_sp_ipip_netdev_parms4(ol_dev);

	return mlxsw_sp_ipip_parms4_daddr(&parms4).addr4;
}

static union mlxsw_sp_l3addr
mlxsw_sp_ipip_netdev_daddr(enum mlxsw_sp_l3proto proto,
			   const struct net_device *ol_dev)
{
	struct ip_tunnel_parm_kern parms4;
	struct __ip6_tnl_parm parms6;

	switch (proto) {
	case MLXSW_SP_L3_PROTO_IPV4:
		parms4 = mlxsw_sp_ipip_netdev_parms4(ol_dev);
		return mlxsw_sp_ipip_parms4_daddr(&parms4);
	case MLXSW_SP_L3_PROTO_IPV6:
		parms6 = mlxsw_sp_ipip_netdev_parms6(ol_dev);
		return mlxsw_sp_ipip_parms6_daddr(&parms6);
	}

	WARN_ON(1);
	return (union mlxsw_sp_l3addr) {0};
}

bool mlxsw_sp_l3addr_is_zero(union mlxsw_sp_l3addr addr)
{
	union mlxsw_sp_l3addr naddr = {0};

	return !memcmp(&addr, &naddr, sizeof(naddr));
}

static struct mlxsw_sp_ipip_parms
mlxsw_sp_ipip_netdev_parms_init_gre4(const struct net_device *ol_dev)
{
	struct ip_tunnel_parm_kern parms = mlxsw_sp_ipip_netdev_parms4(ol_dev);

	return (struct mlxsw_sp_ipip_parms) {
		.proto = MLXSW_SP_L3_PROTO_IPV4,
		.saddr = mlxsw_sp_ipip_parms4_saddr(&parms),
		.daddr = mlxsw_sp_ipip_parms4_daddr(&parms),
		.link = parms.link,
		.ikey = mlxsw_sp_ipip_parms4_ikey(&parms),
		.okey = mlxsw_sp_ipip_parms4_okey(&parms),
	};
}

static int
mlxsw_sp_ipip_nexthop_update_gre4(struct mlxsw_sp *mlxsw_sp, u32 adj_index,
				  struct mlxsw_sp_ipip_entry *ipip_entry,
				  bool force, char *ratr_pl)
{
	u16 rif_index = mlxsw_sp_ipip_lb_rif_index(ipip_entry->ol_lb);
	__be32 daddr4 = mlxsw_sp_ipip_netdev_daddr4(ipip_entry->ol_dev);
	enum mlxsw_reg_ratr_op op;

	op = force ? MLXSW_REG_RATR_OP_WRITE_WRITE_ENTRY :
		     MLXSW_REG_RATR_OP_WRITE_WRITE_ENTRY_ON_ACTIVITY;
	mlxsw_reg_ratr_pack(ratr_pl, op, true, MLXSW_REG_RATR_TYPE_IPIP,
			    adj_index, rif_index);
	mlxsw_reg_ratr_ipip4_entry_pack(ratr_pl, be32_to_cpu(daddr4));

	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ratr), ratr_pl);
}

static int
mlxsw_sp_ipip_decap_config_gre4(struct mlxsw_sp *mlxsw_sp,
				struct mlxsw_sp_ipip_entry *ipip_entry,
				u32 tunnel_index)
{
	u16 rif_index = mlxsw_sp_ipip_lb_rif_index(ipip_entry->ol_lb);
	u16 ul_rif_id = mlxsw_sp_ipip_lb_ul_rif_id(ipip_entry->ol_lb);
	struct ip_tunnel_parm_kern parms;
	char rtdp_pl[MLXSW_REG_RTDP_LEN];
	unsigned int type_check;
	bool has_ikey;
	u32 daddr4;
	u32 ikey;

	parms = mlxsw_sp_ipip_netdev_parms4(ipip_entry->ol_dev);
	has_ikey = mlxsw_sp_ipip_parms4_has_ikey(&parms);
	ikey = mlxsw_sp_ipip_parms4_ikey(&parms);

	mlxsw_reg_rtdp_pack(rtdp_pl, MLXSW_REG_RTDP_TYPE_IPIP, tunnel_index);
	mlxsw_reg_rtdp_egress_router_interface_set(rtdp_pl, ul_rif_id);

	type_check = has_ikey ?
		MLXSW_REG_RTDP_IPIP_TYPE_CHECK_ALLOW_GRE_KEY :
		MLXSW_REG_RTDP_IPIP_TYPE_CHECK_ALLOW_GRE;

	/* Linux demuxes tunnels based on packet SIP (which must match tunnel
	 * remote IP). Thus configure decap so that it filters out packets that
	 * are not IPv4 or have the wrong SIP. IPIP_DECAP_ERROR trap is
	 * generated for packets that fail this criterion. Linux then handles
	 * such packets in slow path and generates ICMP destination unreachable.
	 */
	daddr4 = be32_to_cpu(mlxsw_sp_ipip_netdev_daddr4(ipip_entry->ol_dev));
	mlxsw_reg_rtdp_ipip4_pack(rtdp_pl, rif_index,
				  MLXSW_REG_RTDP_IPIP_SIP_CHECK_FILTER_IPV4,
				  type_check, has_ikey, daddr4, ikey);

	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rtdp), rtdp_pl);
}

static bool mlxsw_sp_ipip_tunnel_complete(enum mlxsw_sp_l3proto proto,
					  const struct net_device *ol_dev)
{
	union mlxsw_sp_l3addr saddr = mlxsw_sp_ipip_netdev_saddr(proto, ol_dev);
	union mlxsw_sp_l3addr daddr = mlxsw_sp_ipip_netdev_daddr(proto, ol_dev);

	/* Tunnels with unset local or remote address are valid in Linux and
	 * used for lightweight tunnels (LWT) and Non-Broadcast Multi-Access
	 * (NBMA) tunnels. In principle these can be offloaded, but the driver
	 * currently doesn't support this. So punt.
	 */
	return !mlxsw_sp_l3addr_is_zero(saddr) &&
	       !mlxsw_sp_l3addr_is_zero(daddr);
}

static bool mlxsw_sp_ipip_can_offload_gre4(const struct mlxsw_sp *mlxsw_sp,
					   const struct net_device *ol_dev)
{
	struct ip_tunnel *tunnel = netdev_priv(ol_dev);
	bool inherit_ttl = tunnel->parms.iph.ttl == 0;
	bool inherit_tos = tunnel->parms.iph.tos & 0x1;
	IP_TUNNEL_DECLARE_FLAGS(okflags) = { };

	/* We can't offload any other features. */
	__set_bit(IP_TUNNEL_KEY_BIT, okflags);

	return ip_tunnel_flags_subset(tunnel->parms.i_flags, okflags) &&
	       ip_tunnel_flags_subset(tunnel->parms.o_flags, okflags) &&
	       inherit_ttl && inherit_tos &&
	       mlxsw_sp_ipip_tunnel_complete(MLXSW_SP_L3_PROTO_IPV4, ol_dev);
}

static struct mlxsw_sp_rif_ipip_lb_config
mlxsw_sp_ipip_ol_loopback_config_gre4(struct mlxsw_sp *mlxsw_sp,
				      const struct net_device *ol_dev)
{
	struct ip_tunnel_parm_kern parms = mlxsw_sp_ipip_netdev_parms4(ol_dev);
	enum mlxsw_reg_ritr_loopback_ipip_type lb_ipipt;

	lb_ipipt = mlxsw_sp_ipip_parms4_has_okey(&parms) ?
		MLXSW_REG_RITR_LOOPBACK_IPIP_TYPE_IP_IN_GRE_KEY_IN_IP :
		MLXSW_REG_RITR_LOOPBACK_IPIP_TYPE_IP_IN_GRE_IN_IP;
	return (struct mlxsw_sp_rif_ipip_lb_config){
		.lb_ipipt = lb_ipipt,
		.okey = mlxsw_sp_ipip_parms4_okey(&parms),
		.ul_protocol = MLXSW_SP_L3_PROTO_IPV4,
		.saddr = mlxsw_sp_ipip_netdev_saddr(MLXSW_SP_L3_PROTO_IPV4,
						    ol_dev),
	};
}

static int
mlxsw_sp_ipip_ol_netdev_change_gre(struct mlxsw_sp *mlxsw_sp,
				   struct mlxsw_sp_ipip_entry *ipip_entry,
				   const struct mlxsw_sp_ipip_parms *new_parms,
				   struct netlink_ext_ack *extack)
{
	const struct mlxsw_sp_ipip_parms *old_parms = &ipip_entry->parms;
	bool update_tunnel = false;
	bool update_decap = false;
	bool update_nhs = false;
	int err = 0;

	if (!mlxsw_sp_l3addr_eq(&new_parms->saddr, &old_parms->saddr)) {
		u16 ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(ipip_entry->ol_dev);

		/* Since the local address has changed, if there is another
		 * tunnel with a matching saddr, both need to be demoted.
		 */
		if (mlxsw_sp_ipip_demote_tunnel_by_saddr(mlxsw_sp,
							 new_parms->proto,
							 new_parms->saddr,
							 ul_tb_id,
							 ipip_entry)) {
			mlxsw_sp_ipip_entry_demote_tunnel(mlxsw_sp, ipip_entry);
			return 0;
		}

		update_tunnel = true;
	} else if (old_parms->okey != new_parms->okey ||
		   old_parms->link != new_parms->link) {
		update_tunnel = true;
	} else if (!mlxsw_sp_l3addr_eq(&new_parms->daddr, &old_parms->daddr)) {
		update_nhs = true;
	} else if (old_parms->ikey != new_parms->ikey) {
		update_decap = true;
	}

	if (update_tunnel)
		err = __mlxsw_sp_ipip_entry_update_tunnel(mlxsw_sp, ipip_entry,
							  true, true, true,
							  extack);
	else if (update_nhs)
		err = __mlxsw_sp_ipip_entry_update_tunnel(mlxsw_sp, ipip_entry,
							  false, false, true,
							  extack);
	else if (update_decap)
		err = __mlxsw_sp_ipip_entry_update_tunnel(mlxsw_sp, ipip_entry,
							  false, false, false,
							  extack);
	if (err)
		return err;

	ipip_entry->parms = *new_parms;
	return 0;
}

static int
mlxsw_sp_ipip_ol_netdev_change_gre4(struct mlxsw_sp *mlxsw_sp,
				    struct mlxsw_sp_ipip_entry *ipip_entry,
				    struct netlink_ext_ack *extack)
{
	struct mlxsw_sp_ipip_parms new_parms;

	new_parms = mlxsw_sp_ipip_netdev_parms_init_gre4(ipip_entry->ol_dev);
	return mlxsw_sp_ipip_ol_netdev_change_gre(mlxsw_sp, ipip_entry,
						  &new_parms, extack);
}

static int
mlxsw_sp_ipip_rem_addr_set_gre4(struct mlxsw_sp *mlxsw_sp,
				struct mlxsw_sp_ipip_entry *ipip_entry)
{
	return 0;
}

static void
mlxsw_sp_ipip_rem_addr_unset_gre4(struct mlxsw_sp *mlxsw_sp,
				  const struct mlxsw_sp_ipip_entry *ipip_entry)
{
}

static const struct mlxsw_sp_ipip_ops mlxsw_sp_ipip_gre4_ops = {
	.dev_type = ARPHRD_IPGRE,
	.ul_proto = MLXSW_SP_L3_PROTO_IPV4,
	.inc_parsing_depth = false,
	.parms_init = mlxsw_sp_ipip_netdev_parms_init_gre4,
	.nexthop_update = mlxsw_sp_ipip_nexthop_update_gre4,
	.decap_config = mlxsw_sp_ipip_decap_config_gre4,
	.can_offload = mlxsw_sp_ipip_can_offload_gre4,
	.ol_loopback_config = mlxsw_sp_ipip_ol_loopback_config_gre4,
	.ol_netdev_change = mlxsw_sp_ipip_ol_netdev_change_gre4,
	.rem_ip_addr_set = mlxsw_sp_ipip_rem_addr_set_gre4,
	.rem_ip_addr_unset = mlxsw_sp_ipip_rem_addr_unset_gre4,
};

static struct mlxsw_sp_ipip_parms
mlxsw_sp_ipip_netdev_parms_init_gre6(const struct net_device *ol_dev)
{
	struct __ip6_tnl_parm parms = mlxsw_sp_ipip_netdev_parms6(ol_dev);

	return (struct mlxsw_sp_ipip_parms) {
		.proto = MLXSW_SP_L3_PROTO_IPV6,
		.saddr = mlxsw_sp_ipip_parms6_saddr(&parms),
		.daddr = mlxsw_sp_ipip_parms6_daddr(&parms),
		.link = parms.link,
		.ikey = mlxsw_sp_ipip_parms6_ikey(&parms),
		.okey = mlxsw_sp_ipip_parms6_okey(&parms),
	};
}

static int
mlxsw_sp_ipip_nexthop_update_gre6(struct mlxsw_sp *mlxsw_sp, u32 adj_index,
				  struct mlxsw_sp_ipip_entry *ipip_entry,
				  bool force, char *ratr_pl)
{
	u16 rif_index = mlxsw_sp_ipip_lb_rif_index(ipip_entry->ol_lb);
	enum mlxsw_reg_ratr_op op;

	op = force ? MLXSW_REG_RATR_OP_WRITE_WRITE_ENTRY :
		     MLXSW_REG_RATR_OP_WRITE_WRITE_ENTRY_ON_ACTIVITY;
	mlxsw_reg_ratr_pack(ratr_pl, op, true, MLXSW_REG_RATR_TYPE_IPIP,
			    adj_index, rif_index);
	mlxsw_reg_ratr_ipip6_entry_pack(ratr_pl,
					ipip_entry->dip_kvdl_index);

	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ratr), ratr_pl);
}

static int
mlxsw_sp_ipip_decap_config_gre6(struct mlxsw_sp *mlxsw_sp,
				struct mlxsw_sp_ipip_entry *ipip_entry,
				u32 tunnel_index)
{
	u16 rif_index = mlxsw_sp_ipip_lb_rif_index(ipip_entry->ol_lb);
	u16 ul_rif_id = mlxsw_sp_ipip_lb_ul_rif_id(ipip_entry->ol_lb);
	char rtdp_pl[MLXSW_REG_RTDP_LEN];
	struct __ip6_tnl_parm parms;
	unsigned int type_check;
	bool has_ikey;
	u32 ikey;

	parms = mlxsw_sp_ipip_netdev_parms6(ipip_entry->ol_dev);
	has_ikey = mlxsw_sp_ipip_parms6_has_ikey(&parms);
	ikey = mlxsw_sp_ipip_parms6_ikey(&parms);

	mlxsw_reg_rtdp_pack(rtdp_pl, MLXSW_REG_RTDP_TYPE_IPIP, tunnel_index);
	mlxsw_reg_rtdp_egress_router_interface_set(rtdp_pl, ul_rif_id);

	type_check = has_ikey ?
		MLXSW_REG_RTDP_IPIP_TYPE_CHECK_ALLOW_GRE_KEY :
		MLXSW_REG_RTDP_IPIP_TYPE_CHECK_ALLOW_GRE;

	/* Linux demuxes tunnels based on packet SIP (which must match tunnel
	 * remote IP). Thus configure decap so that it filters out packets that
	 * are not IPv6 or have the wrong SIP. IPIP_DECAP_ERROR trap is
	 * generated for packets that fail this criterion. Linux then handles
	 * such packets in slow path and generates ICMP destination unreachable.
	 */
	mlxsw_reg_rtdp_ipip6_pack(rtdp_pl, rif_index,
				  MLXSW_REG_RTDP_IPIP_SIP_CHECK_FILTER_IPV6,
				  type_check, has_ikey,
				  ipip_entry->dip_kvdl_index, ikey);

	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rtdp), rtdp_pl);
}

static bool mlxsw_sp_ipip_can_offload_gre6(const struct mlxsw_sp *mlxsw_sp,
					   const struct net_device *ol_dev)
{
	struct __ip6_tnl_parm tparm = mlxsw_sp_ipip_netdev_parms6(ol_dev);
	bool inherit_tos = tparm.flags & IP6_TNL_F_USE_ORIG_TCLASS;
	bool inherit_ttl = tparm.hop_limit == 0;
	IP_TUNNEL_DECLARE_FLAGS(okflags) = { };

	/* We can't offload any other features. */
	__set_bit(IP_TUNNEL_KEY_BIT, okflags);

	return ip_tunnel_flags_subset(tparm.i_flags, okflags) &&
	       ip_tunnel_flags_subset(tparm.o_flags, okflags) &&
	       inherit_ttl && inherit_tos &&
	       mlxsw_sp_ipip_tunnel_complete(MLXSW_SP_L3_PROTO_IPV6, ol_dev);
}

static struct mlxsw_sp_rif_ipip_lb_config
mlxsw_sp_ipip_ol_loopback_config_gre6(struct mlxsw_sp *mlxsw_sp,
				      const struct net_device *ol_dev)
{
	struct __ip6_tnl_parm parms = mlxsw_sp_ipip_netdev_parms6(ol_dev);
	enum mlxsw_reg_ritr_loopback_ipip_type lb_ipipt;

	lb_ipipt = mlxsw_sp_ipip_parms6_has_okey(&parms) ?
		MLXSW_REG_RITR_LOOPBACK_IPIP_TYPE_IP_IN_GRE_KEY_IN_IP :
		MLXSW_REG_RITR_LOOPBACK_IPIP_TYPE_IP_IN_GRE_IN_IP;
	return (struct mlxsw_sp_rif_ipip_lb_config){
		.lb_ipipt = lb_ipipt,
		.okey = mlxsw_sp_ipip_parms6_okey(&parms),
		.ul_protocol = MLXSW_SP_L3_PROTO_IPV6,
		.saddr = mlxsw_sp_ipip_netdev_saddr(MLXSW_SP_L3_PROTO_IPV6,
						    ol_dev),
	};
}

static int
mlxsw_sp_ipip_ol_netdev_change_gre6(struct mlxsw_sp *mlxsw_sp,
				    struct mlxsw_sp_ipip_entry *ipip_entry,
				    struct netlink_ext_ack *extack)
{
	struct mlxsw_sp_ipip_parms new_parms;

	new_parms = mlxsw_sp_ipip_netdev_parms_init_gre6(ipip_entry->ol_dev);
	return mlxsw_sp_ipip_ol_netdev_change_gre(mlxsw_sp, ipip_entry,
						  &new_parms, extack);
}

static int
mlxsw_sp_ipip_rem_addr_set_gre6(struct mlxsw_sp *mlxsw_sp,
				struct mlxsw_sp_ipip_entry *ipip_entry)
{
	return mlxsw_sp_ipv6_addr_kvdl_index_get(mlxsw_sp,
						 &ipip_entry->parms.daddr.addr6,
						 &ipip_entry->dip_kvdl_index);
}

static void
mlxsw_sp_ipip_rem_addr_unset_gre6(struct mlxsw_sp *mlxsw_sp,
				  const struct mlxsw_sp_ipip_entry *ipip_entry)
{
	mlxsw_sp_ipv6_addr_put(mlxsw_sp, &ipip_entry->parms.daddr.addr6);
}

static const struct mlxsw_sp_ipip_ops mlxsw_sp1_ipip_gre6_ops = {
	.dev_type = ARPHRD_IP6GRE,
	.ul_proto = MLXSW_SP_L3_PROTO_IPV6,
	.inc_parsing_depth = true,
	.double_rif_entry = true,
	.parms_init = mlxsw_sp_ipip_netdev_parms_init_gre6,
	.nexthop_update = mlxsw_sp_ipip_nexthop_update_gre6,
	.decap_config = mlxsw_sp_ipip_decap_config_gre6,
	.can_offload = mlxsw_sp_ipip_can_offload_gre6,
	.ol_loopback_config = mlxsw_sp_ipip_ol_loopback_config_gre6,
	.ol_netdev_change = mlxsw_sp_ipip_ol_netdev_change_gre6,
	.rem_ip_addr_set = mlxsw_sp_ipip_rem_addr_set_gre6,
	.rem_ip_addr_unset = mlxsw_sp_ipip_rem_addr_unset_gre6,
};

const struct mlxsw_sp_ipip_ops *mlxsw_sp1_ipip_ops_arr[] = {
	[MLXSW_SP_IPIP_TYPE_GRE4] = &mlxsw_sp_ipip_gre4_ops,
	[MLXSW_SP_IPIP_TYPE_GRE6] = &mlxsw_sp1_ipip_gre6_ops,
};

static const struct mlxsw_sp_ipip_ops mlxsw_sp2_ipip_gre6_ops = {
	.dev_type = ARPHRD_IP6GRE,
	.ul_proto = MLXSW_SP_L3_PROTO_IPV6,
	.inc_parsing_depth = true,
	.parms_init = mlxsw_sp_ipip_netdev_parms_init_gre6,
	.nexthop_update = mlxsw_sp_ipip_nexthop_update_gre6,
	.decap_config = mlxsw_sp_ipip_decap_config_gre6,
	.can_offload = mlxsw_sp_ipip_can_offload_gre6,
	.ol_loopback_config = mlxsw_sp_ipip_ol_loopback_config_gre6,
	.ol_netdev_change = mlxsw_sp_ipip_ol_netdev_change_gre6,
	.rem_ip_addr_set = mlxsw_sp_ipip_rem_addr_set_gre6,
	.rem_ip_addr_unset = mlxsw_sp_ipip_rem_addr_unset_gre6,
};

const struct mlxsw_sp_ipip_ops *mlxsw_sp2_ipip_ops_arr[] = {
	[MLXSW_SP_IPIP_TYPE_GRE4] = &mlxsw_sp_ipip_gre4_ops,
	[MLXSW_SP_IPIP_TYPE_GRE6] = &mlxsw_sp2_ipip_gre6_ops,
};

static int mlxsw_sp_ipip_ecn_encap_init_one(struct mlxsw_sp *mlxsw_sp,
					    u8 inner_ecn, u8 outer_ecn)
{
	char tieem_pl[MLXSW_REG_TIEEM_LEN];

	mlxsw_reg_tieem_pack(tieem_pl, inner_ecn, outer_ecn);
	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(tieem), tieem_pl);
}

int mlxsw_sp_ipip_ecn_encap_init(struct mlxsw_sp *mlxsw_sp)
{
	int i;

	/* Iterate over inner ECN values */
	for (i = INET_ECN_NOT_ECT; i <= INET_ECN_CE; i++) {
		u8 outer_ecn = INET_ECN_encapsulate(0, i);
		int err;

		err = mlxsw_sp_ipip_ecn_encap_init_one(mlxsw_sp, i, outer_ecn);
		if (err)
			return err;
	}

	return 0;
}

static int mlxsw_sp_ipip_ecn_decap_init_one(struct mlxsw_sp *mlxsw_sp,
					    u8 inner_ecn, u8 outer_ecn)
{
	char tidem_pl[MLXSW_REG_TIDEM_LEN];
	u8 new_inner_ecn;
	bool trap_en;

	new_inner_ecn = mlxsw_sp_tunnel_ecn_decap(outer_ecn, inner_ecn,
						  &trap_en);
	mlxsw_reg_tidem_pack(tidem_pl, outer_ecn, inner_ecn, new_inner_ecn,
			     trap_en, trap_en ? MLXSW_TRAP_ID_DECAP_ECN0 : 0);
	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(tidem), tidem_pl);
}

int mlxsw_sp_ipip_ecn_decap_init(struct mlxsw_sp *mlxsw_sp)
{
	int i, j, err;

	/* Iterate over inner ECN values */
	for (i = INET_ECN_NOT_ECT; i <= INET_ECN_CE; i++) {
		/* Iterate over outer ECN values */
		for (j = INET_ECN_NOT_ECT; j <= INET_ECN_CE; j++) {
			err = mlxsw_sp_ipip_ecn_decap_init_one(mlxsw_sp, i, j);
			if (err)
				return err;
		}
	}

	return 0;
}

struct net_device *
mlxsw_sp_ipip_netdev_ul_dev_get(const struct net_device *ol_dev)
{
	struct net *net = dev_net(ol_dev);
	struct ip_tunnel *tun4;
	struct ip6_tnl *tun6;

	switch (ol_dev->type) {
	case ARPHRD_IPGRE:
		tun4 = netdev_priv(ol_dev);
		return dev_get_by_index_rcu(net, tun4->parms.link);
	case ARPHRD_IP6GRE:
		tun6 = netdev_priv(ol_dev);
		return dev_get_by_index_rcu(net, tun6->parms.link);
	default:
		return NULL;
	}
}