summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/mscc/ocelot_flower.c
blob: 729495a1a77ee29628302aad68e4dcab355fb95f (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
// SPDX-License-Identifier: (GPL-2.0 OR MIT)
/* Microsemi Ocelot Switch driver
 * Copyright (c) 2019 Microsemi Corporation
 */

#include <net/pkt_cls.h>
#include <net/tc_act/tc_gact.h>
#include <soc/mscc/ocelot_vcap.h>
#include "ocelot_vcap.h"

/* Arbitrarily chosen constants for encoding the VCAP block and lookup number
 * into the chain number. This is UAPI.
 */
#define VCAP_BLOCK			10000
#define VCAP_LOOKUP			1000
#define VCAP_IS1_NUM_LOOKUPS		3
#define VCAP_IS2_NUM_LOOKUPS		2
#define VCAP_IS2_NUM_PAG		256
#define VCAP_IS1_CHAIN(lookup)		\
	(1 * VCAP_BLOCK + (lookup) * VCAP_LOOKUP)
#define VCAP_IS2_CHAIN(lookup, pag)	\
	(2 * VCAP_BLOCK + (lookup) * VCAP_LOOKUP + (pag))

static int ocelot_chain_to_block(int chain, bool ingress)
{
	int lookup, pag;

	if (!ingress) {
		if (chain == 0)
			return VCAP_ES0;
		return -EOPNOTSUPP;
	}

	/* Backwards compatibility with older, single-chain tc-flower
	 * offload support in Ocelot
	 */
	if (chain == 0)
		return VCAP_IS2;

	for (lookup = 0; lookup < VCAP_IS1_NUM_LOOKUPS; lookup++)
		if (chain == VCAP_IS1_CHAIN(lookup))
			return VCAP_IS1;

	for (lookup = 0; lookup < VCAP_IS2_NUM_LOOKUPS; lookup++)
		for (pag = 0; pag < VCAP_IS2_NUM_PAG; pag++)
			if (chain == VCAP_IS2_CHAIN(lookup, pag))
				return VCAP_IS2;

	return -EOPNOTSUPP;
}

/* Caller must ensure this is a valid IS1 or IS2 chain first,
 * by calling ocelot_chain_to_block.
 */
static int ocelot_chain_to_lookup(int chain)
{
	return (chain / VCAP_LOOKUP) % 10;
}

/* Caller must ensure this is a valid IS2 chain first,
 * by calling ocelot_chain_to_block.
 */
static int ocelot_chain_to_pag(int chain)
{
	int lookup = ocelot_chain_to_lookup(chain);

	/* calculate PAG value as chain index relative to the first PAG */
	return chain - VCAP_IS2_CHAIN(lookup, 0);
}

static bool ocelot_is_goto_target_valid(int goto_target, int chain,
					bool ingress)
{
	int pag;

	/* Can't offload GOTO in VCAP ES0 */
	if (!ingress)
		return (goto_target < 0);

	/* Non-optional GOTOs */
	if (chain == 0)
		/* VCAP IS1 can be skipped, either partially or completely */
		return (goto_target == VCAP_IS1_CHAIN(0) ||
			goto_target == VCAP_IS1_CHAIN(1) ||
			goto_target == VCAP_IS1_CHAIN(2) ||
			goto_target == VCAP_IS2_CHAIN(0, 0) ||
			goto_target == VCAP_IS2_CHAIN(1, 0));

	if (chain == VCAP_IS1_CHAIN(0))
		return (goto_target == VCAP_IS1_CHAIN(1));

	if (chain == VCAP_IS1_CHAIN(1))
		return (goto_target == VCAP_IS1_CHAIN(2));

	/* Lookup 2 of VCAP IS1 can really support non-optional GOTOs,
	 * using a Policy Association Group (PAG) value, which is an 8-bit
	 * value encoding a VCAP IS2 target chain.
	 */
	if (chain == VCAP_IS1_CHAIN(2)) {
		for (pag = 0; pag < VCAP_IS2_NUM_PAG; pag++)
			if (goto_target == VCAP_IS2_CHAIN(0, pag))
				return true;

		return false;
	}

	/* Non-optional GOTO from VCAP IS2 lookup 0 to lookup 1.
	 * We cannot change the PAG at this point.
	 */
	for (pag = 0; pag < VCAP_IS2_NUM_PAG; pag++)
		if (chain == VCAP_IS2_CHAIN(0, pag))
			return (goto_target == VCAP_IS2_CHAIN(1, pag));

	/* VCAP IS2 lookup 1 cannot jump anywhere */
	return false;
}

static struct ocelot_vcap_filter *
ocelot_find_vcap_filter_that_points_at(struct ocelot *ocelot, int chain)
{
	struct ocelot_vcap_filter *filter;
	struct ocelot_vcap_block *block;
	int block_id;

	block_id = ocelot_chain_to_block(chain, true);
	if (block_id < 0)
		return NULL;

	if (block_id == VCAP_IS2) {
		block = &ocelot->block[VCAP_IS1];

		list_for_each_entry(filter, &block->rules, list)
			if (filter->type == OCELOT_VCAP_FILTER_PAG &&
			    filter->goto_target == chain)
				return filter;
	}

	list_for_each_entry(filter, &ocelot->dummy_rules, list)
		if (filter->goto_target == chain)
			return filter;

	return NULL;
}

static int ocelot_flower_parse_action(struct ocelot *ocelot, int port,
				      bool ingress, struct flow_cls_offload *f,
				      struct ocelot_vcap_filter *filter)
{
	struct ocelot_port *ocelot_port = ocelot->ports[port];
	struct netlink_ext_ack *extack = f->common.extack;
	bool allow_missing_goto_target = false;
	const struct flow_action_entry *a;
	enum ocelot_tag_tpid_sel tpid;
	int i, chain, egress_port;
	u64 rate;

	if (!flow_action_basic_hw_stats_check(&f->rule->action,
					      f->common.extack))
		return -EOPNOTSUPP;

	chain = f->common.chain_index;
	filter->block_id = ocelot_chain_to_block(chain, ingress);
	if (filter->block_id < 0) {
		NL_SET_ERR_MSG_MOD(extack, "Cannot offload to this chain");
		return -EOPNOTSUPP;
	}
	if (filter->block_id == VCAP_IS1 || filter->block_id == VCAP_IS2)
		filter->lookup = ocelot_chain_to_lookup(chain);
	if (filter->block_id == VCAP_IS2)
		filter->pag = ocelot_chain_to_pag(chain);

	filter->goto_target = -1;
	filter->type = OCELOT_VCAP_FILTER_DUMMY;

	flow_action_for_each(i, a, &f->rule->action) {
		switch (a->id) {
		case FLOW_ACTION_DROP:
			if (filter->block_id != VCAP_IS2) {
				NL_SET_ERR_MSG_MOD(extack,
						   "Drop action can only be offloaded to VCAP IS2");
				return -EOPNOTSUPP;
			}
			if (filter->goto_target != -1) {
				NL_SET_ERR_MSG_MOD(extack,
						   "Last action must be GOTO");
				return -EOPNOTSUPP;
			}
			filter->action.mask_mode = OCELOT_MASK_MODE_PERMIT_DENY;
			filter->action.port_mask = 0;
			filter->action.police_ena = true;
			filter->action.pol_ix = OCELOT_POLICER_DISCARD;
			filter->type = OCELOT_VCAP_FILTER_OFFLOAD;
			break;
		case FLOW_ACTION_TRAP:
			if (filter->block_id != VCAP_IS2) {
				NL_SET_ERR_MSG_MOD(extack,
						   "Trap action can only be offloaded to VCAP IS2");
				return -EOPNOTSUPP;
			}
			if (filter->goto_target != -1) {
				NL_SET_ERR_MSG_MOD(extack,
						   "Last action must be GOTO");
				return -EOPNOTSUPP;
			}
			filter->action.mask_mode = OCELOT_MASK_MODE_PERMIT_DENY;
			filter->action.port_mask = 0;
			filter->action.cpu_copy_ena = true;
			filter->action.cpu_qu_num = 0;
			filter->type = OCELOT_VCAP_FILTER_OFFLOAD;
			break;
		case FLOW_ACTION_POLICE:
			if (filter->block_id != VCAP_IS2 ||
			    filter->lookup != 0) {
				NL_SET_ERR_MSG_MOD(extack,
						   "Police action can only be offloaded to VCAP IS2 lookup 0");
				return -EOPNOTSUPP;
			}
			if (filter->goto_target != -1) {
				NL_SET_ERR_MSG_MOD(extack,
						   "Last action must be GOTO");
				return -EOPNOTSUPP;
			}
			filter->action.police_ena = true;
			rate = a->police.rate_bytes_ps;
			filter->action.pol.rate = div_u64(rate, 1000) * 8;
			filter->action.pol.burst = a->police.burst;
			filter->type = OCELOT_VCAP_FILTER_OFFLOAD;
			break;
		case FLOW_ACTION_REDIRECT:
			if (filter->block_id != VCAP_IS2) {
				NL_SET_ERR_MSG_MOD(extack,
						   "Redirect action can only be offloaded to VCAP IS2");
				return -EOPNOTSUPP;
			}
			if (filter->goto_target != -1) {
				NL_SET_ERR_MSG_MOD(extack,
						   "Last action must be GOTO");
				return -EOPNOTSUPP;
			}
			egress_port = ocelot->ops->netdev_to_port(a->dev);
			if (egress_port < 0) {
				NL_SET_ERR_MSG_MOD(extack,
						   "Destination not an ocelot port");
				return -EOPNOTSUPP;
			}
			filter->action.mask_mode = OCELOT_MASK_MODE_REDIRECT;
			filter->action.port_mask = BIT(egress_port);
			filter->type = OCELOT_VCAP_FILTER_OFFLOAD;
			break;
		case FLOW_ACTION_VLAN_POP:
			if (filter->block_id != VCAP_IS1) {
				NL_SET_ERR_MSG_MOD(extack,
						   "VLAN pop action can only be offloaded to VCAP IS1");
				return -EOPNOTSUPP;
			}
			if (filter->goto_target != -1) {
				NL_SET_ERR_MSG_MOD(extack,
						   "Last action must be GOTO");
				return -EOPNOTSUPP;
			}
			filter->action.vlan_pop_cnt_ena = true;
			filter->action.vlan_pop_cnt++;
			if (filter->action.vlan_pop_cnt > 2) {
				NL_SET_ERR_MSG_MOD(extack,
						   "Cannot pop more than 2 VLAN headers");
				return -EOPNOTSUPP;
			}
			filter->type = OCELOT_VCAP_FILTER_OFFLOAD;
			break;
		case FLOW_ACTION_VLAN_MANGLE:
			if (filter->block_id != VCAP_IS1) {
				NL_SET_ERR_MSG_MOD(extack,
						   "VLAN modify action can only be offloaded to VCAP IS1");
				return -EOPNOTSUPP;
			}
			if (filter->goto_target != -1) {
				NL_SET_ERR_MSG_MOD(extack,
						   "Last action must be GOTO");
				return -EOPNOTSUPP;
			}
			if (!ocelot_port->vlan_aware) {
				NL_SET_ERR_MSG_MOD(extack,
						   "Can only modify VLAN under VLAN aware bridge");
				return -EOPNOTSUPP;
			}
			filter->action.vid_replace_ena = true;
			filter->action.pcp_dei_ena = true;
			filter->action.vid = a->vlan.vid;
			filter->action.pcp = a->vlan.prio;
			filter->type = OCELOT_VCAP_FILTER_OFFLOAD;
			break;
		case FLOW_ACTION_PRIORITY:
			if (filter->block_id != VCAP_IS1) {
				NL_SET_ERR_MSG_MOD(extack,
						   "Priority action can only be offloaded to VCAP IS1");
				return -EOPNOTSUPP;
			}
			if (filter->goto_target != -1) {
				NL_SET_ERR_MSG_MOD(extack,
						   "Last action must be GOTO");
				return -EOPNOTSUPP;
			}
			filter->action.qos_ena = true;
			filter->action.qos_val = a->priority;
			filter->type = OCELOT_VCAP_FILTER_OFFLOAD;
			break;
		case FLOW_ACTION_GOTO:
			filter->goto_target = a->chain_index;

			if (filter->block_id == VCAP_IS1 && filter->lookup == 2) {
				int pag = ocelot_chain_to_pag(filter->goto_target);

				filter->action.pag_override_mask = 0xff;
				filter->action.pag_val = pag;
				filter->type = OCELOT_VCAP_FILTER_PAG;
			}
			break;
		case FLOW_ACTION_VLAN_PUSH:
			if (filter->block_id != VCAP_ES0) {
				NL_SET_ERR_MSG_MOD(extack,
						   "VLAN push action can only be offloaded to VCAP ES0");
				return -EOPNOTSUPP;
			}
			switch (ntohs(a->vlan.proto)) {
			case ETH_P_8021Q:
				tpid = OCELOT_TAG_TPID_SEL_8021Q;
				break;
			case ETH_P_8021AD:
				tpid = OCELOT_TAG_TPID_SEL_8021AD;
				break;
			default:
				NL_SET_ERR_MSG_MOD(extack,
						   "Cannot push custom TPID");
				return -EOPNOTSUPP;
			}
			filter->action.tag_a_tpid_sel = tpid;
			filter->action.push_outer_tag = OCELOT_ES0_TAG;
			filter->action.tag_a_vid_sel = 1;
			filter->action.vid_a_val = a->vlan.vid;
			filter->action.pcp_a_val = a->vlan.prio;
			filter->type = OCELOT_VCAP_FILTER_OFFLOAD;
			break;
		default:
			NL_SET_ERR_MSG_MOD(extack, "Cannot offload action");
			return -EOPNOTSUPP;
		}
	}

	if (filter->goto_target == -1) {
		if ((filter->block_id == VCAP_IS2 && filter->lookup == 1) ||
		    chain == 0) {
			allow_missing_goto_target = true;
		} else {
			NL_SET_ERR_MSG_MOD(extack, "Missing GOTO action");
			return -EOPNOTSUPP;
		}
	}

	if (!ocelot_is_goto_target_valid(filter->goto_target, chain, ingress) &&
	    !allow_missing_goto_target) {
		NL_SET_ERR_MSG_MOD(extack, "Cannot offload this GOTO target");
		return -EOPNOTSUPP;
	}

	return 0;
}

static int ocelot_flower_parse_indev(struct ocelot *ocelot, int port,
				     struct flow_cls_offload *f,
				     struct ocelot_vcap_filter *filter)
{
	struct flow_rule *rule = flow_cls_offload_flow_rule(f);
	const struct vcap_props *vcap = &ocelot->vcap[VCAP_ES0];
	int key_length = vcap->keys[VCAP_ES0_IGR_PORT].length;
	struct netlink_ext_ack *extack = f->common.extack;
	struct net_device *dev, *indev;
	struct flow_match_meta match;
	int ingress_port;

	flow_rule_match_meta(rule, &match);

	if (!match.mask->ingress_ifindex)
		return 0;

	if (match.mask->ingress_ifindex != 0xFFFFFFFF) {
		NL_SET_ERR_MSG_MOD(extack, "Unsupported ingress ifindex mask");
		return -EOPNOTSUPP;
	}

	dev = ocelot->ops->port_to_netdev(ocelot, port);
	if (!dev)
		return -EINVAL;

	indev = __dev_get_by_index(dev_net(dev), match.key->ingress_ifindex);
	if (!indev) {
		NL_SET_ERR_MSG_MOD(extack,
				   "Can't find the ingress port to match on");
		return -ENOENT;
	}

	ingress_port = ocelot->ops->netdev_to_port(indev);
	if (ingress_port < 0) {
		NL_SET_ERR_MSG_MOD(extack,
				   "Can only offload an ocelot ingress port");
		return -EOPNOTSUPP;
	}
	if (ingress_port == port) {
		NL_SET_ERR_MSG_MOD(extack,
				   "Ingress port is equal to the egress port");
		return -EINVAL;
	}

	filter->ingress_port.value = ingress_port;
	filter->ingress_port.mask = GENMASK(key_length - 1, 0);

	return 0;
}

static int
ocelot_flower_parse_key(struct ocelot *ocelot, int port, bool ingress,
			struct flow_cls_offload *f,
			struct ocelot_vcap_filter *filter)
{
	struct flow_rule *rule = flow_cls_offload_flow_rule(f);
	struct flow_dissector *dissector = rule->match.dissector;
	struct netlink_ext_ack *extack = f->common.extack;
	u16 proto = ntohs(f->common.protocol);
	bool match_protocol = true;
	int ret;

	if (dissector->used_keys &
	    ~(BIT(FLOW_DISSECTOR_KEY_CONTROL) |
	      BIT(FLOW_DISSECTOR_KEY_BASIC) |
	      BIT(FLOW_DISSECTOR_KEY_META) |
	      BIT(FLOW_DISSECTOR_KEY_PORTS) |
	      BIT(FLOW_DISSECTOR_KEY_VLAN) |
	      BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
	      BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
	      BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS))) {
		return -EOPNOTSUPP;
	}

	/* For VCAP ES0 (egress rewriter) we can match on the ingress port */
	if (!ingress) {
		ret = ocelot_flower_parse_indev(ocelot, port, f, filter);
		if (ret)
			return ret;
	}

	if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CONTROL)) {
		struct flow_match_control match;

		flow_rule_match_control(rule, &match);
	}

	if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
		struct flow_match_eth_addrs match;

		if (filter->block_id == VCAP_ES0) {
			NL_SET_ERR_MSG_MOD(extack,
					   "VCAP ES0 cannot match on MAC address");
			return -EOPNOTSUPP;
		}

		if (filter->block_id == VCAP_IS1 &&
		    !is_zero_ether_addr(match.mask->dst)) {
			NL_SET_ERR_MSG_MOD(extack,
					   "Key type S1_NORMAL cannot match on destination MAC");
			return -EOPNOTSUPP;
		}

		/* The hw support mac matches only for MAC_ETYPE key,
		 * therefore if other matches(port, tcp flags, etc) are added
		 * then just bail out
		 */
		if ((dissector->used_keys &
		    (BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS) |
		     BIT(FLOW_DISSECTOR_KEY_BASIC) |
		     BIT(FLOW_DISSECTOR_KEY_CONTROL))) !=
		    (BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS) |
		     BIT(FLOW_DISSECTOR_KEY_BASIC) |
		     BIT(FLOW_DISSECTOR_KEY_CONTROL)))
			return -EOPNOTSUPP;

		flow_rule_match_eth_addrs(rule, &match);
		filter->key_type = OCELOT_VCAP_KEY_ETYPE;
		ether_addr_copy(filter->key.etype.dmac.value,
				match.key->dst);
		ether_addr_copy(filter->key.etype.smac.value,
				match.key->src);
		ether_addr_copy(filter->key.etype.dmac.mask,
				match.mask->dst);
		ether_addr_copy(filter->key.etype.smac.mask,
				match.mask->src);
		goto finished_key_parsing;
	}

	if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) {
		struct flow_match_basic match;

		flow_rule_match_basic(rule, &match);
		if (ntohs(match.key->n_proto) == ETH_P_IP) {
			if (filter->block_id == VCAP_ES0) {
				NL_SET_ERR_MSG_MOD(extack,
						   "VCAP ES0 cannot match on IP protocol");
				return -EOPNOTSUPP;
			}

			filter->key_type = OCELOT_VCAP_KEY_IPV4;
			filter->key.ipv4.proto.value[0] =
				match.key->ip_proto;
			filter->key.ipv4.proto.mask[0] =
				match.mask->ip_proto;
			match_protocol = false;
		}
		if (ntohs(match.key->n_proto) == ETH_P_IPV6) {
			if (filter->block_id == VCAP_ES0) {
				NL_SET_ERR_MSG_MOD(extack,
						   "VCAP ES0 cannot match on IP protocol");
				return -EOPNOTSUPP;
			}

			filter->key_type = OCELOT_VCAP_KEY_IPV6;
			filter->key.ipv6.proto.value[0] =
				match.key->ip_proto;
			filter->key.ipv6.proto.mask[0] =
				match.mask->ip_proto;
			match_protocol = false;
		}
	}

	if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IPV4_ADDRS) &&
	    proto == ETH_P_IP) {
		struct flow_match_ipv4_addrs match;
		u8 *tmp;

		if (filter->block_id == VCAP_ES0) {
			NL_SET_ERR_MSG_MOD(extack,
					   "VCAP ES0 cannot match on IP address");
			return -EOPNOTSUPP;
		}

		if (filter->block_id == VCAP_IS1 && *(u32 *)&match.mask->dst) {
			NL_SET_ERR_MSG_MOD(extack,
					   "Key type S1_NORMAL cannot match on destination IP");
			return -EOPNOTSUPP;
		}

		flow_rule_match_ipv4_addrs(rule, &match);
		tmp = &filter->key.ipv4.sip.value.addr[0];
		memcpy(tmp, &match.key->src, 4);

		tmp = &filter->key.ipv4.sip.mask.addr[0];
		memcpy(tmp, &match.mask->src, 4);

		tmp = &filter->key.ipv4.dip.value.addr[0];
		memcpy(tmp, &match.key->dst, 4);

		tmp = &filter->key.ipv4.dip.mask.addr[0];
		memcpy(tmp, &match.mask->dst, 4);
		match_protocol = false;
	}

	if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IPV6_ADDRS) &&
	    proto == ETH_P_IPV6) {
		return -EOPNOTSUPP;
	}

	if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_PORTS)) {
		struct flow_match_ports match;

		if (filter->block_id == VCAP_ES0) {
			NL_SET_ERR_MSG_MOD(extack,
					   "VCAP ES0 cannot match on L4 ports");
			return -EOPNOTSUPP;
		}

		flow_rule_match_ports(rule, &match);
		filter->key.ipv4.sport.value = ntohs(match.key->src);
		filter->key.ipv4.sport.mask = ntohs(match.mask->src);
		filter->key.ipv4.dport.value = ntohs(match.key->dst);
		filter->key.ipv4.dport.mask = ntohs(match.mask->dst);
		match_protocol = false;
	}

	if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_VLAN)) {
		struct flow_match_vlan match;

		flow_rule_match_vlan(rule, &match);
		filter->key_type = OCELOT_VCAP_KEY_ANY;
		filter->vlan.vid.value = match.key->vlan_id;
		filter->vlan.vid.mask = match.mask->vlan_id;
		filter->vlan.pcp.value[0] = match.key->vlan_priority;
		filter->vlan.pcp.mask[0] = match.mask->vlan_priority;
		match_protocol = false;
	}

finished_key_parsing:
	if (match_protocol && proto != ETH_P_ALL) {
		if (filter->block_id == VCAP_ES0) {
			NL_SET_ERR_MSG_MOD(extack,
					   "VCAP ES0 cannot match on L2 proto");
			return -EOPNOTSUPP;
		}

		/* TODO: support SNAP, LLC etc */
		if (proto < ETH_P_802_3_MIN)
			return -EOPNOTSUPP;
		filter->key_type = OCELOT_VCAP_KEY_ETYPE;
		*(__be16 *)filter->key.etype.etype.value = htons(proto);
		*(__be16 *)filter->key.etype.etype.mask = htons(0xffff);
	}
	/* else, a filter of type OCELOT_VCAP_KEY_ANY is implicitly added */

	return 0;
}

static int ocelot_flower_parse(struct ocelot *ocelot, int port, bool ingress,
			       struct flow_cls_offload *f,
			       struct ocelot_vcap_filter *filter)
{
	int ret;

	filter->prio = f->common.prio;
	filter->id = f->cookie;

	ret = ocelot_flower_parse_action(ocelot, port, ingress, f, filter);
	if (ret)
		return ret;

	return ocelot_flower_parse_key(ocelot, port, ingress, f, filter);
}

static struct ocelot_vcap_filter
*ocelot_vcap_filter_create(struct ocelot *ocelot, int port, bool ingress,
			   struct flow_cls_offload *f)
{
	struct ocelot_vcap_filter *filter;

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

	if (ingress) {
		filter->ingress_port_mask = BIT(port);
	} else {
		const struct vcap_props *vcap = &ocelot->vcap[VCAP_ES0];
		int key_length = vcap->keys[VCAP_ES0_EGR_PORT].length;

		filter->egress_port.value = port;
		filter->egress_port.mask = GENMASK(key_length - 1, 0);
	}

	return filter;
}

static int ocelot_vcap_dummy_filter_add(struct ocelot *ocelot,
					struct ocelot_vcap_filter *filter)
{
	list_add(&filter->list, &ocelot->dummy_rules);

	return 0;
}

static int ocelot_vcap_dummy_filter_del(struct ocelot *ocelot,
					struct ocelot_vcap_filter *filter)
{
	list_del(&filter->list);
	kfree(filter);

	return 0;
}

int ocelot_cls_flower_replace(struct ocelot *ocelot, int port,
			      struct flow_cls_offload *f, bool ingress)
{
	struct netlink_ext_ack *extack = f->common.extack;
	struct ocelot_vcap_filter *filter;
	int chain = f->common.chain_index;
	int ret;

	if (chain && !ocelot_find_vcap_filter_that_points_at(ocelot, chain)) {
		NL_SET_ERR_MSG_MOD(extack, "No default GOTO action points to this chain");
		return -EOPNOTSUPP;
	}

	filter = ocelot_vcap_filter_create(ocelot, port, ingress, f);
	if (!filter)
		return -ENOMEM;

	ret = ocelot_flower_parse(ocelot, port, ingress, f, filter);
	if (ret) {
		kfree(filter);
		return ret;
	}

	/* The non-optional GOTOs for the TCAM skeleton don't need
	 * to be actually offloaded.
	 */
	if (filter->type == OCELOT_VCAP_FILTER_DUMMY)
		return ocelot_vcap_dummy_filter_add(ocelot, filter);

	return ocelot_vcap_filter_add(ocelot, filter, f->common.extack);
}
EXPORT_SYMBOL_GPL(ocelot_cls_flower_replace);

int ocelot_cls_flower_destroy(struct ocelot *ocelot, int port,
			      struct flow_cls_offload *f, bool ingress)
{
	struct ocelot_vcap_filter *filter;
	struct ocelot_vcap_block *block;
	int block_id;

	block_id = ocelot_chain_to_block(f->common.chain_index, ingress);
	if (block_id < 0)
		return 0;

	block = &ocelot->block[block_id];

	filter = ocelot_vcap_block_find_filter_by_id(block, f->cookie);
	if (!filter)
		return 0;

	if (filter->type == OCELOT_VCAP_FILTER_DUMMY)
		return ocelot_vcap_dummy_filter_del(ocelot, filter);

	return ocelot_vcap_filter_del(ocelot, filter);
}
EXPORT_SYMBOL_GPL(ocelot_cls_flower_destroy);

int ocelot_cls_flower_stats(struct ocelot *ocelot, int port,
			    struct flow_cls_offload *f, bool ingress)
{
	struct ocelot_vcap_filter *filter;
	struct ocelot_vcap_block *block;
	int block_id, ret;

	block_id = ocelot_chain_to_block(f->common.chain_index, ingress);
	if (block_id < 0)
		return 0;

	block = &ocelot->block[block_id];

	filter = ocelot_vcap_block_find_filter_by_id(block, f->cookie);
	if (!filter || filter->type == OCELOT_VCAP_FILTER_DUMMY)
		return 0;

	ret = ocelot_vcap_filter_stats_update(ocelot, filter);
	if (ret)
		return ret;

	flow_stats_update(&f->stats, 0x0, filter->stats.pkts, 0, 0x0,
			  FLOW_ACTION_HW_STATS_IMMEDIATE);
	return 0;
}
EXPORT_SYMBOL_GPL(ocelot_cls_flower_stats);