summaryrefslogtreecommitdiffstats
path: root/net/devlink/port.c
blob: 78592912f657c934885077c900ef95b9d79aed4c (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
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (c) 2016 Mellanox Technologies. All rights reserved.
 * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
 */

#include "devl_internal.h"

#define DEVLINK_PORT_FN_CAPS_VALID_MASK \
	(_BITUL(__DEVLINK_PORT_FN_ATTR_CAPS_MAX) - 1)

static const struct nla_policy devlink_function_nl_policy[DEVLINK_PORT_FUNCTION_ATTR_MAX + 1] = {
	[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR] = { .type = NLA_BINARY },
	[DEVLINK_PORT_FN_ATTR_STATE] =
		NLA_POLICY_RANGE(NLA_U8, DEVLINK_PORT_FN_STATE_INACTIVE,
				 DEVLINK_PORT_FN_STATE_ACTIVE),
	[DEVLINK_PORT_FN_ATTR_CAPS] =
		NLA_POLICY_BITFIELD32(DEVLINK_PORT_FN_CAPS_VALID_MASK),
};

#define ASSERT_DEVLINK_PORT_REGISTERED(devlink_port)				\
	WARN_ON_ONCE(!(devlink_port)->registered)
#define ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port)			\
	WARN_ON_ONCE((devlink_port)->registered)

struct devlink_port *devlink_port_get_by_index(struct devlink *devlink,
					       unsigned int port_index)
{
	return xa_load(&devlink->ports, port_index);
}

struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink,
						 struct nlattr **attrs)
{
	if (attrs[DEVLINK_ATTR_PORT_INDEX]) {
		u32 port_index = nla_get_u32(attrs[DEVLINK_ATTR_PORT_INDEX]);
		struct devlink_port *devlink_port;

		devlink_port = devlink_port_get_by_index(devlink, port_index);
		if (!devlink_port)
			return ERR_PTR(-ENODEV);
		return devlink_port;
	}
	return ERR_PTR(-EINVAL);
}

struct devlink_port *devlink_port_get_from_info(struct devlink *devlink,
						struct genl_info *info)
{
	return devlink_port_get_from_attrs(devlink, info->attrs);
}

static void devlink_port_fn_cap_fill(struct nla_bitfield32 *caps,
				     u32 cap, bool is_enable)
{
	caps->selector |= cap;
	if (is_enable)
		caps->value |= cap;
}

static int devlink_port_fn_roce_fill(struct devlink_port *devlink_port,
				     struct nla_bitfield32 *caps,
				     struct netlink_ext_ack *extack)
{
	bool is_enable;
	int err;

	if (!devlink_port->ops->port_fn_roce_get)
		return 0;

	err = devlink_port->ops->port_fn_roce_get(devlink_port, &is_enable,
						  extack);
	if (err) {
		if (err == -EOPNOTSUPP)
			return 0;
		return err;
	}

	devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_ROCE, is_enable);
	return 0;
}

static int devlink_port_fn_migratable_fill(struct devlink_port *devlink_port,
					   struct nla_bitfield32 *caps,
					   struct netlink_ext_ack *extack)
{
	bool is_enable;
	int err;

	if (!devlink_port->ops->port_fn_migratable_get ||
	    devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF)
		return 0;

	err = devlink_port->ops->port_fn_migratable_get(devlink_port,
							&is_enable, extack);
	if (err) {
		if (err == -EOPNOTSUPP)
			return 0;
		return err;
	}

	devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_MIGRATABLE, is_enable);
	return 0;
}

static int devlink_port_fn_ipsec_crypto_fill(struct devlink_port *devlink_port,
					     struct nla_bitfield32 *caps,
					     struct netlink_ext_ack *extack)
{
	bool is_enable;
	int err;

	if (!devlink_port->ops->port_fn_ipsec_crypto_get ||
	    devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF)
		return 0;

	err = devlink_port->ops->port_fn_ipsec_crypto_get(devlink_port, &is_enable, extack);
	if (err) {
		if (err == -EOPNOTSUPP)
			return 0;
		return err;
	}

	devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO, is_enable);
	return 0;
}

static int devlink_port_fn_ipsec_packet_fill(struct devlink_port *devlink_port,
					     struct nla_bitfield32 *caps,
					     struct netlink_ext_ack *extack)
{
	bool is_enable;
	int err;

	if (!devlink_port->ops->port_fn_ipsec_packet_get ||
	    devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF)
		return 0;

	err = devlink_port->ops->port_fn_ipsec_packet_get(devlink_port, &is_enable, extack);
	if (err) {
		if (err == -EOPNOTSUPP)
			return 0;
		return err;
	}

	devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_IPSEC_PACKET, is_enable);
	return 0;
}

static int devlink_port_fn_caps_fill(struct devlink_port *devlink_port,
				     struct sk_buff *msg,
				     struct netlink_ext_ack *extack,
				     bool *msg_updated)
{
	struct nla_bitfield32 caps = {};
	int err;

	err = devlink_port_fn_roce_fill(devlink_port, &caps, extack);
	if (err)
		return err;

	err = devlink_port_fn_migratable_fill(devlink_port, &caps, extack);
	if (err)
		return err;

	err = devlink_port_fn_ipsec_crypto_fill(devlink_port, &caps, extack);
	if (err)
		return err;

	err = devlink_port_fn_ipsec_packet_fill(devlink_port, &caps, extack);
	if (err)
		return err;

	if (!caps.selector)
		return 0;
	err = nla_put_bitfield32(msg, DEVLINK_PORT_FN_ATTR_CAPS, caps.value,
				 caps.selector);
	if (err)
		return err;

	*msg_updated = true;
	return 0;
}

int devlink_nl_port_handle_fill(struct sk_buff *msg, struct devlink_port *devlink_port)
{
	if (devlink_nl_put_handle(msg, devlink_port->devlink))
		return -EMSGSIZE;
	if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
		return -EMSGSIZE;
	return 0;
}

size_t devlink_nl_port_handle_size(struct devlink_port *devlink_port)
{
	struct devlink *devlink = devlink_port->devlink;

	return nla_total_size(strlen(devlink->dev->bus->name) + 1) /* DEVLINK_ATTR_BUS_NAME */
	     + nla_total_size(strlen(dev_name(devlink->dev)) + 1) /* DEVLINK_ATTR_DEV_NAME */
	     + nla_total_size(4); /* DEVLINK_ATTR_PORT_INDEX */
}

static int devlink_nl_port_attrs_put(struct sk_buff *msg,
				     struct devlink_port *devlink_port)
{
	struct devlink_port_attrs *attrs = &devlink_port->attrs;

	if (!devlink_port->attrs_set)
		return 0;
	if (attrs->lanes) {
		if (nla_put_u32(msg, DEVLINK_ATTR_PORT_LANES, attrs->lanes))
			return -EMSGSIZE;
	}
	if (nla_put_u8(msg, DEVLINK_ATTR_PORT_SPLITTABLE, attrs->splittable))
		return -EMSGSIZE;
	if (nla_put_u16(msg, DEVLINK_ATTR_PORT_FLAVOUR, attrs->flavour))
		return -EMSGSIZE;
	switch (devlink_port->attrs.flavour) {
	case DEVLINK_PORT_FLAVOUR_PCI_PF:
		if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER,
				attrs->pci_pf.controller) ||
		    nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER, attrs->pci_pf.pf))
			return -EMSGSIZE;
		if (nla_put_u8(msg, DEVLINK_ATTR_PORT_EXTERNAL, attrs->pci_pf.external))
			return -EMSGSIZE;
		break;
	case DEVLINK_PORT_FLAVOUR_PCI_VF:
		if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER,
				attrs->pci_vf.controller) ||
		    nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER, attrs->pci_vf.pf) ||
		    nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_VF_NUMBER, attrs->pci_vf.vf))
			return -EMSGSIZE;
		if (nla_put_u8(msg, DEVLINK_ATTR_PORT_EXTERNAL, attrs->pci_vf.external))
			return -EMSGSIZE;
		break;
	case DEVLINK_PORT_FLAVOUR_PCI_SF:
		if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER,
				attrs->pci_sf.controller) ||
		    nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER,
				attrs->pci_sf.pf) ||
		    nla_put_u32(msg, DEVLINK_ATTR_PORT_PCI_SF_NUMBER,
				attrs->pci_sf.sf))
			return -EMSGSIZE;
		break;
	case DEVLINK_PORT_FLAVOUR_PHYSICAL:
	case DEVLINK_PORT_FLAVOUR_CPU:
	case DEVLINK_PORT_FLAVOUR_DSA:
		if (nla_put_u32(msg, DEVLINK_ATTR_PORT_NUMBER,
				attrs->phys.port_number))
			return -EMSGSIZE;
		if (!attrs->split)
			return 0;
		if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_GROUP,
				attrs->phys.port_number))
			return -EMSGSIZE;
		if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_SUBPORT_NUMBER,
				attrs->phys.split_subport_number))
			return -EMSGSIZE;
		break;
	default:
		break;
	}
	return 0;
}

static int devlink_port_fn_hw_addr_fill(struct devlink_port *port,
					struct sk_buff *msg,
					struct netlink_ext_ack *extack,
					bool *msg_updated)
{
	u8 hw_addr[MAX_ADDR_LEN];
	int hw_addr_len;
	int err;

	if (!port->ops->port_fn_hw_addr_get)
		return 0;

	err = port->ops->port_fn_hw_addr_get(port, hw_addr, &hw_addr_len,
					     extack);
	if (err) {
		if (err == -EOPNOTSUPP)
			return 0;
		return err;
	}
	err = nla_put(msg, DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR, hw_addr_len, hw_addr);
	if (err)
		return err;
	*msg_updated = true;
	return 0;
}

static bool
devlink_port_fn_state_valid(enum devlink_port_fn_state state)
{
	return state == DEVLINK_PORT_FN_STATE_INACTIVE ||
	       state == DEVLINK_PORT_FN_STATE_ACTIVE;
}

static bool
devlink_port_fn_opstate_valid(enum devlink_port_fn_opstate opstate)
{
	return opstate == DEVLINK_PORT_FN_OPSTATE_DETACHED ||
	       opstate == DEVLINK_PORT_FN_OPSTATE_ATTACHED;
}

static int devlink_port_fn_state_fill(struct devlink_port *port,
				      struct sk_buff *msg,
				      struct netlink_ext_ack *extack,
				      bool *msg_updated)
{
	enum devlink_port_fn_opstate opstate;
	enum devlink_port_fn_state state;
	int err;

	if (!port->ops->port_fn_state_get)
		return 0;

	err = port->ops->port_fn_state_get(port, &state, &opstate, extack);
	if (err) {
		if (err == -EOPNOTSUPP)
			return 0;
		return err;
	}
	if (!devlink_port_fn_state_valid(state)) {
		WARN_ON_ONCE(1);
		NL_SET_ERR_MSG(extack, "Invalid state read from driver");
		return -EINVAL;
	}
	if (!devlink_port_fn_opstate_valid(opstate)) {
		WARN_ON_ONCE(1);
		NL_SET_ERR_MSG(extack, "Invalid operational state read from driver");
		return -EINVAL;
	}
	if (nla_put_u8(msg, DEVLINK_PORT_FN_ATTR_STATE, state) ||
	    nla_put_u8(msg, DEVLINK_PORT_FN_ATTR_OPSTATE, opstate))
		return -EMSGSIZE;
	*msg_updated = true;
	return 0;
}

static int
devlink_port_fn_mig_set(struct devlink_port *devlink_port, bool enable,
			struct netlink_ext_ack *extack)
{
	return devlink_port->ops->port_fn_migratable_set(devlink_port, enable,
							 extack);
}

static int
devlink_port_fn_roce_set(struct devlink_port *devlink_port, bool enable,
			 struct netlink_ext_ack *extack)
{
	return devlink_port->ops->port_fn_roce_set(devlink_port, enable,
						   extack);
}

static int
devlink_port_fn_ipsec_crypto_set(struct devlink_port *devlink_port, bool enable,
				 struct netlink_ext_ack *extack)
{
	return devlink_port->ops->port_fn_ipsec_crypto_set(devlink_port, enable, extack);
}

static int
devlink_port_fn_ipsec_packet_set(struct devlink_port *devlink_port, bool enable,
				 struct netlink_ext_ack *extack)
{
	return devlink_port->ops->port_fn_ipsec_packet_set(devlink_port, enable, extack);
}

static int devlink_port_fn_caps_set(struct devlink_port *devlink_port,
				    const struct nlattr *attr,
				    struct netlink_ext_ack *extack)
{
	struct nla_bitfield32 caps;
	u32 caps_value;
	int err;

	caps = nla_get_bitfield32(attr);
	caps_value = caps.value & caps.selector;
	if (caps.selector & DEVLINK_PORT_FN_CAP_ROCE) {
		err = devlink_port_fn_roce_set(devlink_port,
					       caps_value & DEVLINK_PORT_FN_CAP_ROCE,
					       extack);
		if (err)
			return err;
	}
	if (caps.selector & DEVLINK_PORT_FN_CAP_MIGRATABLE) {
		err = devlink_port_fn_mig_set(devlink_port, caps_value &
					      DEVLINK_PORT_FN_CAP_MIGRATABLE,
					      extack);
		if (err)
			return err;
	}
	if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO) {
		err = devlink_port_fn_ipsec_crypto_set(devlink_port, caps_value &
						       DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO,
						       extack);
		if (err)
			return err;
	}
	if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_PACKET) {
		err = devlink_port_fn_ipsec_packet_set(devlink_port, caps_value &
						       DEVLINK_PORT_FN_CAP_IPSEC_PACKET,
						       extack);
		if (err)
			return err;
	}
	return 0;
}

static int
devlink_nl_port_function_attrs_put(struct sk_buff *msg, struct devlink_port *port,
				   struct netlink_ext_ack *extack)
{
	struct nlattr *function_attr;
	bool msg_updated = false;
	int err;

	function_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_PORT_FUNCTION);
	if (!function_attr)
		return -EMSGSIZE;

	err = devlink_port_fn_hw_addr_fill(port, msg, extack, &msg_updated);
	if (err)
		goto out;
	err = devlink_port_fn_caps_fill(port, msg, extack, &msg_updated);
	if (err)
		goto out;
	err = devlink_port_fn_state_fill(port, msg, extack, &msg_updated);
	if (err)
		goto out;
	err = devlink_rel_devlink_handle_put(msg, port->devlink,
					     port->rel_index,
					     DEVLINK_PORT_FN_ATTR_DEVLINK,
					     &msg_updated);

out:
	if (err || !msg_updated)
		nla_nest_cancel(msg, function_attr);
	else
		nla_nest_end(msg, function_attr);
	return err;
}

static int devlink_nl_port_fill(struct sk_buff *msg,
				struct devlink_port *devlink_port,
				enum devlink_command cmd, u32 portid, u32 seq,
				int flags, struct netlink_ext_ack *extack)
{
	struct devlink *devlink = devlink_port->devlink;
	void *hdr;

	hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
	if (!hdr)
		return -EMSGSIZE;

	if (devlink_nl_put_handle(msg, devlink))
		goto nla_put_failure;
	if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
		goto nla_put_failure;

	spin_lock_bh(&devlink_port->type_lock);
	if (nla_put_u16(msg, DEVLINK_ATTR_PORT_TYPE, devlink_port->type))
		goto nla_put_failure_type_locked;
	if (devlink_port->desired_type != DEVLINK_PORT_TYPE_NOTSET &&
	    nla_put_u16(msg, DEVLINK_ATTR_PORT_DESIRED_TYPE,
			devlink_port->desired_type))
		goto nla_put_failure_type_locked;
	if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) {
		if (devlink_port->type_eth.netdev &&
		    (nla_put_u32(msg, DEVLINK_ATTR_PORT_NETDEV_IFINDEX,
				 devlink_port->type_eth.ifindex) ||
		     nla_put_string(msg, DEVLINK_ATTR_PORT_NETDEV_NAME,
				    devlink_port->type_eth.ifname)))
			goto nla_put_failure_type_locked;
	}
	if (devlink_port->type == DEVLINK_PORT_TYPE_IB) {
		struct ib_device *ibdev = devlink_port->type_ib.ibdev;

		if (ibdev &&
		    nla_put_string(msg, DEVLINK_ATTR_PORT_IBDEV_NAME,
				   ibdev->name))
			goto nla_put_failure_type_locked;
	}
	spin_unlock_bh(&devlink_port->type_lock);
	if (devlink_nl_port_attrs_put(msg, devlink_port))
		goto nla_put_failure;
	if (devlink_nl_port_function_attrs_put(msg, devlink_port, extack))
		goto nla_put_failure;
	if (devlink_port->linecard &&
	    nla_put_u32(msg, DEVLINK_ATTR_LINECARD_INDEX,
			devlink_linecard_index(devlink_port->linecard)))
		goto nla_put_failure;

	genlmsg_end(msg, hdr);
	return 0;

nla_put_failure_type_locked:
	spin_unlock_bh(&devlink_port->type_lock);
nla_put_failure:
	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
}

static void devlink_port_notify(struct devlink_port *devlink_port,
				enum devlink_command cmd)
{
	struct devlink *devlink = devlink_port->devlink;
	struct devlink_obj_desc desc;
	struct sk_buff *msg;
	int err;

	WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL);

	if (!__devl_is_registered(devlink) || !devlink_nl_notify_need(devlink))
		return;

	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
	if (!msg)
		return;

	err = devlink_nl_port_fill(msg, devlink_port, cmd, 0, 0, 0, NULL);
	if (err) {
		nlmsg_free(msg);
		return;
	}

	devlink_nl_obj_desc_init(&desc, devlink);
	devlink_nl_obj_desc_port_set(&desc, devlink_port);
	devlink_nl_notify_send_desc(devlink, msg, &desc);
}

static void devlink_ports_notify(struct devlink *devlink,
				 enum devlink_command cmd)
{
	struct devlink_port *devlink_port;
	unsigned long port_index;

	xa_for_each(&devlink->ports, port_index, devlink_port)
		devlink_port_notify(devlink_port, cmd);
}

void devlink_ports_notify_register(struct devlink *devlink)
{
	devlink_ports_notify(devlink, DEVLINK_CMD_PORT_NEW);
}

void devlink_ports_notify_unregister(struct devlink *devlink)
{
	devlink_ports_notify(devlink, DEVLINK_CMD_PORT_DEL);
}

int devlink_nl_port_get_doit(struct sk_buff *skb, struct genl_info *info)
{
	struct devlink_port *devlink_port = info->user_ptr[1];
	struct sk_buff *msg;
	int err;

	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
	if (!msg)
		return -ENOMEM;

	err = devlink_nl_port_fill(msg, devlink_port, DEVLINK_CMD_PORT_NEW,
				   info->snd_portid, info->snd_seq, 0,
				   info->extack);
	if (err) {
		nlmsg_free(msg);
		return err;
	}

	return genlmsg_reply(msg, info);
}

static int
devlink_nl_port_get_dump_one(struct sk_buff *msg, struct devlink *devlink,
			     struct netlink_callback *cb, int flags)
{
	struct devlink_nl_dump_state *state = devlink_dump_state(cb);
	struct devlink_port *devlink_port;
	unsigned long port_index;
	int err = 0;

	xa_for_each_start(&devlink->ports, port_index, devlink_port, state->idx) {
		err = devlink_nl_port_fill(msg, devlink_port,
					   DEVLINK_CMD_NEW,
					   NETLINK_CB(cb->skb).portid,
					   cb->nlh->nlmsg_seq, flags,
					   cb->extack);
		if (err) {
			state->idx = port_index;
			break;
		}
	}

	return err;
}

int devlink_nl_port_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
{
	return devlink_nl_dumpit(skb, cb, devlink_nl_port_get_dump_one);
}

static int devlink_port_type_set(struct devlink_port *devlink_port,
				 enum devlink_port_type port_type)

{
	int err;

	if (!devlink_port->ops->port_type_set)
		return -EOPNOTSUPP;

	if (port_type == devlink_port->type)
		return 0;

	err = devlink_port->ops->port_type_set(devlink_port, port_type);
	if (err)
		return err;

	devlink_port->desired_type = port_type;
	devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
	return 0;
}

static int devlink_port_function_hw_addr_set(struct devlink_port *port,
					     const struct nlattr *attr,
					     struct netlink_ext_ack *extack)
{
	const u8 *hw_addr;
	int hw_addr_len;

	hw_addr = nla_data(attr);
	hw_addr_len = nla_len(attr);
	if (hw_addr_len > MAX_ADDR_LEN) {
		NL_SET_ERR_MSG(extack, "Port function hardware address too long");
		return -EINVAL;
	}
	if (port->type == DEVLINK_PORT_TYPE_ETH) {
		if (hw_addr_len != ETH_ALEN) {
			NL_SET_ERR_MSG(extack, "Address must be 6 bytes for Ethernet device");
			return -EINVAL;
		}
		if (!is_unicast_ether_addr(hw_addr)) {
			NL_SET_ERR_MSG(extack, "Non-unicast hardware address unsupported");
			return -EINVAL;
		}
	}

	return port->ops->port_fn_hw_addr_set(port, hw_addr, hw_addr_len,
					      extack);
}

static int devlink_port_fn_state_set(struct devlink_port *port,
				     const struct nlattr *attr,
				     struct netlink_ext_ack *extack)
{
	enum devlink_port_fn_state state;

	state = nla_get_u8(attr);
	return port->ops->port_fn_state_set(port, state, extack);
}

static int devlink_port_function_validate(struct devlink_port *devlink_port,
					  struct nlattr **tb,
					  struct netlink_ext_ack *extack)
{
	const struct devlink_port_ops *ops = devlink_port->ops;
	struct nlattr *attr;

	if (tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR] &&
	    !ops->port_fn_hw_addr_set) {
		NL_SET_ERR_MSG_ATTR(extack, tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR],
				    "Port doesn't support function attributes");
		return -EOPNOTSUPP;
	}
	if (tb[DEVLINK_PORT_FN_ATTR_STATE] && !ops->port_fn_state_set) {
		NL_SET_ERR_MSG_ATTR(extack, tb[DEVLINK_PORT_FN_ATTR_STATE],
				    "Function does not support state setting");
		return -EOPNOTSUPP;
	}
	attr = tb[DEVLINK_PORT_FN_ATTR_CAPS];
	if (attr) {
		struct nla_bitfield32 caps;

		caps = nla_get_bitfield32(attr);
		if (caps.selector & DEVLINK_PORT_FN_CAP_ROCE &&
		    !ops->port_fn_roce_set) {
			NL_SET_ERR_MSG_ATTR(extack, attr,
					    "Port doesn't support RoCE function attribute");
			return -EOPNOTSUPP;
		}
		if (caps.selector & DEVLINK_PORT_FN_CAP_MIGRATABLE) {
			if (!ops->port_fn_migratable_set) {
				NL_SET_ERR_MSG_ATTR(extack, attr,
						    "Port doesn't support migratable function attribute");
				return -EOPNOTSUPP;
			}
			if (devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) {
				NL_SET_ERR_MSG_ATTR(extack, attr,
						    "migratable function attribute supported for VFs only");
				return -EOPNOTSUPP;
			}
		}
		if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO) {
			if (!ops->port_fn_ipsec_crypto_set) {
				NL_SET_ERR_MSG_ATTR(extack, attr,
						    "Port doesn't support ipsec_crypto function attribute");
				return -EOPNOTSUPP;
			}
			if (devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) {
				NL_SET_ERR_MSG_ATTR(extack, attr,
						    "ipsec_crypto function attribute supported for VFs only");
				return -EOPNOTSUPP;
			}
		}
		if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_PACKET) {
			if (!ops->port_fn_ipsec_packet_set) {
				NL_SET_ERR_MSG_ATTR(extack, attr,
						    "Port doesn't support ipsec_packet function attribute");
				return -EOPNOTSUPP;
			}
			if (devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) {
				NL_SET_ERR_MSG_ATTR(extack, attr,
						    "ipsec_packet function attribute supported for VFs only");
				return -EOPNOTSUPP;
			}
		}
	}
	return 0;
}

static int devlink_port_function_set(struct devlink_port *port,
				     const struct nlattr *attr,
				     struct netlink_ext_ack *extack)
{
	struct nlattr *tb[DEVLINK_PORT_FUNCTION_ATTR_MAX + 1];
	int err;

	err = nla_parse_nested(tb, DEVLINK_PORT_FUNCTION_ATTR_MAX, attr,
			       devlink_function_nl_policy, extack);
	if (err < 0) {
		NL_SET_ERR_MSG(extack, "Fail to parse port function attributes");
		return err;
	}

	err = devlink_port_function_validate(port, tb, extack);
	if (err)
		return err;

	attr = tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR];
	if (attr) {
		err = devlink_port_function_hw_addr_set(port, attr, extack);
		if (err)
			return err;
	}

	attr = tb[DEVLINK_PORT_FN_ATTR_CAPS];
	if (attr) {
		err = devlink_port_fn_caps_set(port, attr, extack);
		if (err)
			return err;
	}

	/* Keep this as the last function attribute set, so that when
	 * multiple port function attributes are set along with state,
	 * Those can be applied first before activating the state.
	 */
	attr = tb[DEVLINK_PORT_FN_ATTR_STATE];
	if (attr)
		err = devlink_port_fn_state_set(port, attr, extack);

	if (!err)
		devlink_port_notify(port, DEVLINK_CMD_PORT_NEW);
	return err;
}

int devlink_nl_port_set_doit(struct sk_buff *skb, struct genl_info *info)
{
	struct devlink_port *devlink_port = info->user_ptr[1];
	int err;

	if (info->attrs[DEVLINK_ATTR_PORT_TYPE]) {
		enum devlink_port_type port_type;

		port_type = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_TYPE]);
		err = devlink_port_type_set(devlink_port, port_type);
		if (err)
			return err;
	}

	if (info->attrs[DEVLINK_ATTR_PORT_FUNCTION]) {
		struct nlattr *attr = info->attrs[DEVLINK_ATTR_PORT_FUNCTION];
		struct netlink_ext_ack *extack = info->extack;

		err = devlink_port_function_set(devlink_port, attr, extack);
		if (err)
			return err;
	}

	return 0;
}

int devlink_nl_port_split_doit(struct sk_buff *skb, struct genl_info *info)
{
	struct devlink_port *devlink_port = info->user_ptr[1];
	struct devlink *devlink = info->user_ptr[0];
	u32 count;

	if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_PORT_SPLIT_COUNT))
		return -EINVAL;
	if (!devlink_port->ops->port_split)
		return -EOPNOTSUPP;

	count = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]);

	if (!devlink_port->attrs.splittable) {
		/* Split ports cannot be split. */
		if (devlink_port->attrs.split)
			NL_SET_ERR_MSG(info->extack, "Port cannot be split further");
		else
			NL_SET_ERR_MSG(info->extack, "Port cannot be split");
		return -EINVAL;
	}

	if (count < 2 || !is_power_of_2(count) || count > devlink_port->attrs.lanes) {
		NL_SET_ERR_MSG(info->extack, "Invalid split count");
		return -EINVAL;
	}

	return devlink_port->ops->port_split(devlink, devlink_port, count,
					     info->extack);
}

int devlink_nl_port_unsplit_doit(struct sk_buff *skb, struct genl_info *info)
{
	struct devlink_port *devlink_port = info->user_ptr[1];
	struct devlink *devlink = info->user_ptr[0];

	if (!devlink_port->ops->port_unsplit)
		return -EOPNOTSUPP;
	return devlink_port->ops->port_unsplit(devlink, devlink_port, info->extack);
}

int devlink_nl_port_new_doit(struct sk_buff *skb, struct genl_info *info)
{
	struct netlink_ext_ack *extack = info->extack;
	struct devlink_port_new_attrs new_attrs = {};
	struct devlink *devlink = info->user_ptr[0];
	struct devlink_port *devlink_port;
	struct sk_buff *msg;
	int err;

	if (!devlink->ops->port_new)
		return -EOPNOTSUPP;

	if (!info->attrs[DEVLINK_ATTR_PORT_FLAVOUR] ||
	    !info->attrs[DEVLINK_ATTR_PORT_PCI_PF_NUMBER]) {
		NL_SET_ERR_MSG(extack, "Port flavour or PCI PF are not specified");
		return -EINVAL;
	}
	new_attrs.flavour = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_FLAVOUR]);
	new_attrs.pfnum =
		nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_PCI_PF_NUMBER]);

	if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) {
		/* Port index of the new port being created by driver. */
		new_attrs.port_index =
			nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
		new_attrs.port_index_valid = true;
	}
	if (info->attrs[DEVLINK_ATTR_PORT_CONTROLLER_NUMBER]) {
		new_attrs.controller =
			nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_CONTROLLER_NUMBER]);
		new_attrs.controller_valid = true;
	}
	if (new_attrs.flavour == DEVLINK_PORT_FLAVOUR_PCI_SF &&
	    info->attrs[DEVLINK_ATTR_PORT_PCI_SF_NUMBER]) {
		new_attrs.sfnum = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_PCI_SF_NUMBER]);
		new_attrs.sfnum_valid = true;
	}

	err = devlink->ops->port_new(devlink, &new_attrs,
				     extack, &devlink_port);
	if (err)
		return err;

	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
	if (!msg) {
		err = -ENOMEM;
		goto err_out_port_del;
	}
	err = devlink_nl_port_fill(msg, devlink_port, DEVLINK_CMD_NEW,
				   info->snd_portid, info->snd_seq, 0, NULL);
	if (WARN_ON_ONCE(err))
		goto err_out_msg_free;
	err = genlmsg_reply(msg, info);
	if (err)
		goto err_out_port_del;
	return 0;

err_out_msg_free:
	nlmsg_free(msg);
err_out_port_del:
	devlink_port->ops->port_del(devlink, devlink_port, NULL);
	return err;
}

int devlink_nl_port_del_doit(struct sk_buff *skb, struct genl_info *info)
{
	struct devlink_port *devlink_port = info->user_ptr[1];
	struct netlink_ext_ack *extack = info->extack;
	struct devlink *devlink = info->user_ptr[0];

	if (!devlink_port->ops->port_del)
		return -EOPNOTSUPP;

	return devlink_port->ops->port_del(devlink, devlink_port, extack);
}

static void devlink_port_type_warn(struct work_struct *work)
{
	struct devlink_port *port = container_of(to_delayed_work(work),
						 struct devlink_port,
						 type_warn_dw);
	dev_warn(port->devlink->dev, "Type was not set for devlink port.");
}

static bool devlink_port_type_should_warn(struct devlink_port *devlink_port)
{
	/* Ignore CPU and DSA flavours. */
	return devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_CPU &&
	       devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_DSA &&
	       devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_UNUSED;
}

#define DEVLINK_PORT_TYPE_WARN_TIMEOUT (HZ * 3600)

static void devlink_port_type_warn_schedule(struct devlink_port *devlink_port)
{
	if (!devlink_port_type_should_warn(devlink_port))
		return;
	/* Schedule a work to WARN in case driver does not set port
	 * type within timeout.
	 */
	schedule_delayed_work(&devlink_port->type_warn_dw,
			      DEVLINK_PORT_TYPE_WARN_TIMEOUT);
}

static void devlink_port_type_warn_cancel(struct devlink_port *devlink_port)
{
	if (!devlink_port_type_should_warn(devlink_port))
		return;
	cancel_delayed_work_sync(&devlink_port->type_warn_dw);
}

/**
 * devlink_port_init() - Init devlink port
 *
 * @devlink: devlink
 * @devlink_port: devlink port
 *
 * Initialize essential stuff that is needed for functions
 * that may be called before devlink port registration.
 * Call to this function is optional and not needed
 * in case the driver does not use such functions.
 */
void devlink_port_init(struct devlink *devlink,
		       struct devlink_port *devlink_port)
{
	if (devlink_port->initialized)
		return;
	devlink_port->devlink = devlink;
	INIT_LIST_HEAD(&devlink_port->region_list);
	devlink_port->initialized = true;
}
EXPORT_SYMBOL_GPL(devlink_port_init);

/**
 * devlink_port_fini() - Deinitialize devlink port
 *
 * @devlink_port: devlink port
 *
 * Deinitialize essential stuff that is in use for functions
 * that may be called after devlink port unregistration.
 * Call to this function is optional and not needed
 * in case the driver does not use such functions.
 */
void devlink_port_fini(struct devlink_port *devlink_port)
{
	WARN_ON(!list_empty(&devlink_port->region_list));
}
EXPORT_SYMBOL_GPL(devlink_port_fini);

static const struct devlink_port_ops devlink_port_dummy_ops = {};

/**
 * devl_port_register_with_ops() - Register devlink port
 *
 * @devlink: devlink
 * @devlink_port: devlink port
 * @port_index: driver-specific numerical identifier of the port
 * @ops: port ops
 *
 * Register devlink port with provided port index. User can use
 * any indexing, even hw-related one. devlink_port structure
 * is convenient to be embedded inside user driver private structure.
 * Note that the caller should take care of zeroing the devlink_port
 * structure.
 */
int devl_port_register_with_ops(struct devlink *devlink,
				struct devlink_port *devlink_port,
				unsigned int port_index,
				const struct devlink_port_ops *ops)
{
	int err;

	devl_assert_locked(devlink);

	ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);

	devlink_port_init(devlink, devlink_port);
	devlink_port->registered = true;
	devlink_port->index = port_index;
	devlink_port->ops = ops ? ops : &devlink_port_dummy_ops;
	spin_lock_init(&devlink_port->type_lock);
	INIT_LIST_HEAD(&devlink_port->reporter_list);
	err = xa_insert(&devlink->ports, port_index, devlink_port, GFP_KERNEL);
	if (err) {
		devlink_port->registered = false;
		return err;
	}

	INIT_DELAYED_WORK(&devlink_port->type_warn_dw, &devlink_port_type_warn);
	devlink_port_type_warn_schedule(devlink_port);
	devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
	return 0;
}
EXPORT_SYMBOL_GPL(devl_port_register_with_ops);

/**
 *	devlink_port_register_with_ops - Register devlink port
 *
 *	@devlink: devlink
 *	@devlink_port: devlink port
 *	@port_index: driver-specific numerical identifier of the port
 *	@ops: port ops
 *
 *	Register devlink port with provided port index. User can use
 *	any indexing, even hw-related one. devlink_port structure
 *	is convenient to be embedded inside user driver private structure.
 *	Note that the caller should take care of zeroing the devlink_port
 *	structure.
 *
 *	Context: Takes and release devlink->lock <mutex>.
 */
int devlink_port_register_with_ops(struct devlink *devlink,
				   struct devlink_port *devlink_port,
				   unsigned int port_index,
				   const struct devlink_port_ops *ops)
{
	int err;

	devl_lock(devlink);
	err = devl_port_register_with_ops(devlink, devlink_port,
					  port_index, ops);
	devl_unlock(devlink);
	return err;
}
EXPORT_SYMBOL_GPL(devlink_port_register_with_ops);

/**
 * devl_port_unregister() - Unregister devlink port
 *
 * @devlink_port: devlink port
 */
void devl_port_unregister(struct devlink_port *devlink_port)
{
	lockdep_assert_held(&devlink_port->devlink->lock);
	WARN_ON(devlink_port->type != DEVLINK_PORT_TYPE_NOTSET);

	devlink_port_type_warn_cancel(devlink_port);
	devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
	xa_erase(&devlink_port->devlink->ports, devlink_port->index);
	WARN_ON(!list_empty(&devlink_port->reporter_list));
	devlink_port->registered = false;
}
EXPORT_SYMBOL_GPL(devl_port_unregister);

/**
 *	devlink_port_unregister - Unregister devlink port
 *
 *	@devlink_port: devlink port
 *
 *	Context: Takes and release devlink->lock <mutex>.
 */
void devlink_port_unregister(struct devlink_port *devlink_port)
{
	struct devlink *devlink = devlink_port->devlink;

	devl_lock(devlink);
	devl_port_unregister(devlink_port);
	devl_unlock(devlink);
}
EXPORT_SYMBOL_GPL(devlink_port_unregister);

static void devlink_port_type_netdev_checks(struct devlink_port *devlink_port,
					    struct net_device *netdev)
{
	const struct net_device_ops *ops = netdev->netdev_ops;

	/* If driver registers devlink port, it should set devlink port
	 * attributes accordingly so the compat functions are called
	 * and the original ops are not used.
	 */
	if (ops->ndo_get_phys_port_name) {
		/* Some drivers use the same set of ndos for netdevs
		 * that have devlink_port registered and also for
		 * those who don't. Make sure that ndo_get_phys_port_name
		 * returns -EOPNOTSUPP here in case it is defined.
		 * Warn if not.
		 */
		char name[IFNAMSIZ];
		int err;

		err = ops->ndo_get_phys_port_name(netdev, name, sizeof(name));
		WARN_ON(err != -EOPNOTSUPP);
	}
	if (ops->ndo_get_port_parent_id) {
		/* Some drivers use the same set of ndos for netdevs
		 * that have devlink_port registered and also for
		 * those who don't. Make sure that ndo_get_port_parent_id
		 * returns -EOPNOTSUPP here in case it is defined.
		 * Warn if not.
		 */
		struct netdev_phys_item_id ppid;
		int err;

		err = ops->ndo_get_port_parent_id(netdev, &ppid);
		WARN_ON(err != -EOPNOTSUPP);
	}
}

static void __devlink_port_type_set(struct devlink_port *devlink_port,
				    enum devlink_port_type type,
				    void *type_dev)
{
	struct net_device *netdev = type_dev;

	ASSERT_DEVLINK_PORT_REGISTERED(devlink_port);

	if (type == DEVLINK_PORT_TYPE_NOTSET) {
		devlink_port_type_warn_schedule(devlink_port);
	} else {
		devlink_port_type_warn_cancel(devlink_port);
		if (type == DEVLINK_PORT_TYPE_ETH && netdev)
			devlink_port_type_netdev_checks(devlink_port, netdev);
	}

	spin_lock_bh(&devlink_port->type_lock);
	devlink_port->type = type;
	switch (type) {
	case DEVLINK_PORT_TYPE_ETH:
		devlink_port->type_eth.netdev = netdev;
		if (netdev) {
			ASSERT_RTNL();
			devlink_port->type_eth.ifindex = netdev->ifindex;
			BUILD_BUG_ON(sizeof(devlink_port->type_eth.ifname) !=
				     sizeof(netdev->name));
			strcpy(devlink_port->type_eth.ifname, netdev->name);
		}
		break;
	case DEVLINK_PORT_TYPE_IB:
		devlink_port->type_ib.ibdev = type_dev;
		break;
	default:
		break;
	}
	spin_unlock_bh(&devlink_port->type_lock);
	devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
}

/**
 *	devlink_port_type_eth_set - Set port type to Ethernet
 *
 *	@devlink_port: devlink port
 *
 *	If driver is calling this, most likely it is doing something wrong.
 */
void devlink_port_type_eth_set(struct devlink_port *devlink_port)
{
	dev_warn(devlink_port->devlink->dev,
		 "devlink port type for port %d set to Ethernet without a software interface reference, device type not supported by the kernel?\n",
		 devlink_port->index);
	__devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH, NULL);
}
EXPORT_SYMBOL_GPL(devlink_port_type_eth_set);

/**
 *	devlink_port_type_ib_set - Set port type to InfiniBand
 *
 *	@devlink_port: devlink port
 *	@ibdev: related IB device
 */
void devlink_port_type_ib_set(struct devlink_port *devlink_port,
			      struct ib_device *ibdev)
{
	__devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_IB, ibdev);
}
EXPORT_SYMBOL_GPL(devlink_port_type_ib_set);

/**
 *	devlink_port_type_clear - Clear port type
 *
 *	@devlink_port: devlink port
 *
 *	If driver is calling this for clearing Ethernet type, most likely
 *	it is doing something wrong.
 */
void devlink_port_type_clear(struct devlink_port *devlink_port)
{
	if (devlink_port->type == DEVLINK_PORT_TYPE_ETH)
		dev_warn(devlink_port->devlink->dev,
			 "devlink port type for port %d cleared without a software interface reference, device type not supported by the kernel?\n",
			 devlink_port->index);
	__devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET, NULL);
}
EXPORT_SYMBOL_GPL(devlink_port_type_clear);

int devlink_port_netdevice_event(struct notifier_block *nb,
				 unsigned long event, void *ptr)
{
	struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
	struct devlink_port *devlink_port = netdev->devlink_port;
	struct devlink *devlink;

	if (!devlink_port)
		return NOTIFY_OK;
	devlink = devlink_port->devlink;

	switch (event) {
	case NETDEV_POST_INIT:
		/* Set the type but not netdev pointer. It is going to be set
		 * later on by NETDEV_REGISTER event. Happens once during
		 * netdevice register
		 */
		__devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH,
					NULL);
		break;
	case NETDEV_REGISTER:
	case NETDEV_CHANGENAME:
		if (devlink_net(devlink) != dev_net(netdev))
			return NOTIFY_OK;
		/* Set the netdev on top of previously set type. Note this
		 * event happens also during net namespace change so here
		 * we take into account netdev pointer appearing in this
		 * namespace.
		 */
		__devlink_port_type_set(devlink_port, devlink_port->type,
					netdev);
		break;
	case NETDEV_UNREGISTER:
		if (devlink_net(devlink) != dev_net(netdev))
			return NOTIFY_OK;
		/* Clear netdev pointer, but not the type. This event happens
		 * also during net namespace change so we need to clear
		 * pointer to netdev that is going to another net namespace.
		 */
		__devlink_port_type_set(devlink_port, devlink_port->type,
					NULL);
		break;
	case NETDEV_PRE_UNINIT:
		/* Clear the type and the netdev pointer. Happens one during
		 * netdevice unregister.
		 */
		__devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET,
					NULL);
		break;
	}

	return NOTIFY_OK;
}

static int __devlink_port_attrs_set(struct devlink_port *devlink_port,
				    enum devlink_port_flavour flavour)
{
	struct devlink_port_attrs *attrs = &devlink_port->attrs;

	devlink_port->attrs_set = true;
	attrs->flavour = flavour;
	if (attrs->switch_id.id_len) {
		devlink_port->switch_port = true;
		if (WARN_ON(attrs->switch_id.id_len > MAX_PHYS_ITEM_ID_LEN))
			attrs->switch_id.id_len = MAX_PHYS_ITEM_ID_LEN;
	} else {
		devlink_port->switch_port = false;
	}
	return 0;
}

/**
 *	devlink_port_attrs_set - Set port attributes
 *
 *	@devlink_port: devlink port
 *	@attrs: devlink port attrs
 */
void devlink_port_attrs_set(struct devlink_port *devlink_port,
			    struct devlink_port_attrs *attrs)
{
	int ret;

	ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);

	devlink_port->attrs = *attrs;
	ret = __devlink_port_attrs_set(devlink_port, attrs->flavour);
	if (ret)
		return;
	WARN_ON(attrs->splittable && attrs->split);
}
EXPORT_SYMBOL_GPL(devlink_port_attrs_set);

/**
 *	devlink_port_attrs_pci_pf_set - Set PCI PF port attributes
 *
 *	@devlink_port: devlink port
 *	@controller: associated controller number for the devlink port instance
 *	@pf: associated PF for the devlink port instance
 *	@external: indicates if the port is for an external controller
 */
void devlink_port_attrs_pci_pf_set(struct devlink_port *devlink_port, u32 controller,
				   u16 pf, bool external)
{
	struct devlink_port_attrs *attrs = &devlink_port->attrs;
	int ret;

	ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);

	ret = __devlink_port_attrs_set(devlink_port,
				       DEVLINK_PORT_FLAVOUR_PCI_PF);
	if (ret)
		return;
	attrs->pci_pf.controller = controller;
	attrs->pci_pf.pf = pf;
	attrs->pci_pf.external = external;
}
EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_pf_set);

/**
 *	devlink_port_attrs_pci_vf_set - Set PCI VF port attributes
 *
 *	@devlink_port: devlink port
 *	@controller: associated controller number for the devlink port instance
 *	@pf: associated PF for the devlink port instance
 *	@vf: associated VF of a PF for the devlink port instance
 *	@external: indicates if the port is for an external controller
 */
void devlink_port_attrs_pci_vf_set(struct devlink_port *devlink_port, u32 controller,
				   u16 pf, u16 vf, bool external)
{
	struct devlink_port_attrs *attrs = &devlink_port->attrs;
	int ret;

	ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);

	ret = __devlink_port_attrs_set(devlink_port,
				       DEVLINK_PORT_FLAVOUR_PCI_VF);
	if (ret)
		return;
	attrs->pci_vf.controller = controller;
	attrs->pci_vf.pf = pf;
	attrs->pci_vf.vf = vf;
	attrs->pci_vf.external = external;
}
EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_vf_set);

/**
 *	devlink_port_attrs_pci_sf_set - Set PCI SF port attributes
 *
 *	@devlink_port: devlink port
 *	@controller: associated controller number for the devlink port instance
 *	@pf: associated PF for the devlink port instance
 *	@sf: associated SF of a PF for the devlink port instance
 *	@external: indicates if the port is for an external controller
 */
void devlink_port_attrs_pci_sf_set(struct devlink_port *devlink_port, u32 controller,
				   u16 pf, u32 sf, bool external)
{
	struct devlink_port_attrs *attrs = &devlink_port->attrs;
	int ret;

	ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);

	ret = __devlink_port_attrs_set(devlink_port,
				       DEVLINK_PORT_FLAVOUR_PCI_SF);
	if (ret)
		return;
	attrs->pci_sf.controller = controller;
	attrs->pci_sf.pf = pf;
	attrs->pci_sf.sf = sf;
	attrs->pci_sf.external = external;
}
EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_sf_set);

static void devlink_port_rel_notify_cb(struct devlink *devlink, u32 port_index)
{
	struct devlink_port *devlink_port;

	devlink_port = devlink_port_get_by_index(devlink, port_index);
	if (!devlink_port)
		return;
	devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
}

static void devlink_port_rel_cleanup_cb(struct devlink *devlink, u32 port_index,
					u32 rel_index)
{
	struct devlink_port *devlink_port;

	devlink_port = devlink_port_get_by_index(devlink, port_index);
	if (devlink_port && devlink_port->rel_index == rel_index)
		devlink_port->rel_index = 0;
}

/**
 * devl_port_fn_devlink_set - Attach peer devlink
 *			      instance to port function.
 * @devlink_port: devlink port
 * @fn_devlink: devlink instance to attach
 */
int devl_port_fn_devlink_set(struct devlink_port *devlink_port,
			     struct devlink *fn_devlink)
{
	ASSERT_DEVLINK_PORT_REGISTERED(devlink_port);

	if (WARN_ON(devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_SF ||
		    devlink_port->attrs.pci_sf.external))
		return -EINVAL;

	return devlink_rel_nested_in_add(&devlink_port->rel_index,
					 devlink_port->devlink->index,
					 devlink_port->index,
					 devlink_port_rel_notify_cb,
					 devlink_port_rel_cleanup_cb,
					 fn_devlink);
}
EXPORT_SYMBOL_GPL(devl_port_fn_devlink_set);

/**
 *	devlink_port_linecard_set - Link port with a linecard
 *
 *	@devlink_port: devlink port
 *	@linecard: devlink linecard
 */
void devlink_port_linecard_set(struct devlink_port *devlink_port,
			       struct devlink_linecard *linecard)
{
	ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);

	devlink_port->linecard = linecard;
}
EXPORT_SYMBOL_GPL(devlink_port_linecard_set);

static int __devlink_port_phys_port_name_get(struct devlink_port *devlink_port,
					     char *name, size_t len)
{
	struct devlink_port_attrs *attrs = &devlink_port->attrs;
	int n = 0;

	if (!devlink_port->attrs_set)
		return -EOPNOTSUPP;

	switch (attrs->flavour) {
	case DEVLINK_PORT_FLAVOUR_PHYSICAL:
		if (devlink_port->linecard)
			n = snprintf(name, len, "l%u",
				     devlink_linecard_index(devlink_port->linecard));
		if (n < len)
			n += snprintf(name + n, len - n, "p%u",
				      attrs->phys.port_number);
		if (n < len && attrs->split)
			n += snprintf(name + n, len - n, "s%u",
				      attrs->phys.split_subport_number);
		break;
	case DEVLINK_PORT_FLAVOUR_CPU:
	case DEVLINK_PORT_FLAVOUR_DSA:
	case DEVLINK_PORT_FLAVOUR_UNUSED:
		/* As CPU and DSA ports do not have a netdevice associated
		 * case should not ever happen.
		 */
		WARN_ON(1);
		return -EINVAL;
	case DEVLINK_PORT_FLAVOUR_PCI_PF:
		if (attrs->pci_pf.external) {
			n = snprintf(name, len, "c%u", attrs->pci_pf.controller);
			if (n >= len)
				return -EINVAL;
			len -= n;
			name += n;
		}
		n = snprintf(name, len, "pf%u", attrs->pci_pf.pf);
		break;
	case DEVLINK_PORT_FLAVOUR_PCI_VF:
		if (attrs->pci_vf.external) {
			n = snprintf(name, len, "c%u", attrs->pci_vf.controller);
			if (n >= len)
				return -EINVAL;
			len -= n;
			name += n;
		}
		n = snprintf(name, len, "pf%uvf%u",
			     attrs->pci_vf.pf, attrs->pci_vf.vf);
		break;
	case DEVLINK_PORT_FLAVOUR_PCI_SF:
		if (attrs->pci_sf.external) {
			n = snprintf(name, len, "c%u", attrs->pci_sf.controller);
			if (n >= len)
				return -EINVAL;
			len -= n;
			name += n;
		}
		n = snprintf(name, len, "pf%usf%u", attrs->pci_sf.pf,
			     attrs->pci_sf.sf);
		break;
	case DEVLINK_PORT_FLAVOUR_VIRTUAL:
		return -EOPNOTSUPP;
	}

	if (n >= len)
		return -EINVAL;

	return 0;
}

int devlink_compat_phys_port_name_get(struct net_device *dev,
				      char *name, size_t len)
{
	struct devlink_port *devlink_port;

	/* RTNL mutex is held here which ensures that devlink_port
	 * instance cannot disappear in the middle. No need to take
	 * any devlink lock as only permanent values are accessed.
	 */
	ASSERT_RTNL();

	devlink_port = dev->devlink_port;
	if (!devlink_port)
		return -EOPNOTSUPP;

	return __devlink_port_phys_port_name_get(devlink_port, name, len);
}

int devlink_compat_switch_id_get(struct net_device *dev,
				 struct netdev_phys_item_id *ppid)
{
	struct devlink_port *devlink_port;

	/* Caller must hold RTNL mutex or reference to dev, which ensures that
	 * devlink_port instance cannot disappear in the middle. No need to take
	 * any devlink lock as only permanent values are accessed.
	 */
	devlink_port = dev->devlink_port;
	if (!devlink_port || !devlink_port->switch_port)
		return -EOPNOTSUPP;

	memcpy(ppid, &devlink_port->attrs.switch_id, sizeof(*ppid));

	return 0;
}