summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c
blob: 795f45024c209e65591a3e9fe60814315ebb3cb0 (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
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
/* Broadcom NetXtreme-C/E network driver.
 *
 * Copyright (c) 2017 Broadcom Limited
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation.
 */

#include <linux/netdevice.h>
#include <linux/inetdevice.h>
#include <linux/if_vlan.h>
#include <net/flow_dissector.h>
#include <net/pkt_cls.h>
#include <net/tc_act/tc_gact.h>
#include <net/tc_act/tc_skbedit.h>
#include <net/tc_act/tc_mirred.h>
#include <net/tc_act/tc_vlan.h>
#include <net/tc_act/tc_tunnel_key.h>

#include "bnxt_hsi.h"
#include "bnxt.h"
#include "bnxt_sriov.h"
#include "bnxt_tc.h"
#include "bnxt_vfr.h"

#define BNXT_FID_INVALID			0xffff
#define VLAN_TCI(vid, prio)	((vid) | ((prio) << VLAN_PRIO_SHIFT))

/* Return the dst fid of the func for flow forwarding
 * For PFs: src_fid is the fid of the PF
 * For VF-reps: src_fid the fid of the VF
 */
static u16 bnxt_flow_get_dst_fid(struct bnxt *pf_bp, struct net_device *dev)
{
	struct bnxt *bp;

	/* check if dev belongs to the same switch */
	if (!switchdev_port_same_parent_id(pf_bp->dev, dev)) {
		netdev_info(pf_bp->dev, "dev(ifindex=%d) not on same switch",
			    dev->ifindex);
		return BNXT_FID_INVALID;
	}

	/* Is dev a VF-rep? */
	if (bnxt_dev_is_vf_rep(dev))
		return bnxt_vf_rep_get_fid(dev);

	bp = netdev_priv(dev);
	return bp->pf.fw_fid;
}

static int bnxt_tc_parse_redir(struct bnxt *bp,
			       struct bnxt_tc_actions *actions,
			       const struct tc_action *tc_act)
{
	struct net_device *dev = tcf_mirred_dev(tc_act);

	if (!dev) {
		netdev_info(bp->dev, "no dev in mirred action");
		return -EINVAL;
	}

	actions->flags |= BNXT_TC_ACTION_FLAG_FWD;
	actions->dst_dev = dev;
	return 0;
}

static void bnxt_tc_parse_vlan(struct bnxt *bp,
			       struct bnxt_tc_actions *actions,
			       const struct tc_action *tc_act)
{
	if (tcf_vlan_action(tc_act) == TCA_VLAN_ACT_POP) {
		actions->flags |= BNXT_TC_ACTION_FLAG_POP_VLAN;
	} else if (tcf_vlan_action(tc_act) == TCA_VLAN_ACT_PUSH) {
		actions->flags |= BNXT_TC_ACTION_FLAG_PUSH_VLAN;
		actions->push_vlan_tci = htons(tcf_vlan_push_vid(tc_act));
		actions->push_vlan_tpid = tcf_vlan_push_proto(tc_act);
	}
}

static int bnxt_tc_parse_tunnel_set(struct bnxt *bp,
				    struct bnxt_tc_actions *actions,
				    const struct tc_action *tc_act)
{
	struct ip_tunnel_info *tun_info = tcf_tunnel_info(tc_act);
	struct ip_tunnel_key *tun_key = &tun_info->key;

	if (ip_tunnel_info_af(tun_info) != AF_INET) {
		netdev_info(bp->dev, "only IPv4 tunnel-encap is supported");
		return -EOPNOTSUPP;
	}

	actions->tun_encap_key = *tun_key;
	actions->flags |= BNXT_TC_ACTION_FLAG_TUNNEL_ENCAP;
	return 0;
}

static int bnxt_tc_parse_actions(struct bnxt *bp,
				 struct bnxt_tc_actions *actions,
				 struct tcf_exts *tc_exts)
{
	const struct tc_action *tc_act;
	LIST_HEAD(tc_actions);
	int rc;

	if (!tcf_exts_has_actions(tc_exts)) {
		netdev_info(bp->dev, "no actions");
		return -EINVAL;
	}

	tcf_exts_to_list(tc_exts, &tc_actions);
	list_for_each_entry(tc_act, &tc_actions, list) {
		/* Drop action */
		if (is_tcf_gact_shot(tc_act)) {
			actions->flags |= BNXT_TC_ACTION_FLAG_DROP;
			return 0; /* don't bother with other actions */
		}

		/* Redirect action */
		if (is_tcf_mirred_egress_redirect(tc_act)) {
			rc = bnxt_tc_parse_redir(bp, actions, tc_act);
			if (rc)
				return rc;
			continue;
		}

		/* Push/pop VLAN */
		if (is_tcf_vlan(tc_act)) {
			bnxt_tc_parse_vlan(bp, actions, tc_act);
			continue;
		}

		/* Tunnel encap */
		if (is_tcf_tunnel_set(tc_act)) {
			rc = bnxt_tc_parse_tunnel_set(bp, actions, tc_act);
			if (rc)
				return rc;
			continue;
		}

		/* Tunnel decap */
		if (is_tcf_tunnel_release(tc_act)) {
			actions->flags |= BNXT_TC_ACTION_FLAG_TUNNEL_DECAP;
			continue;
		}
	}

	if (actions->flags & BNXT_TC_ACTION_FLAG_FWD) {
		if (actions->flags & BNXT_TC_ACTION_FLAG_TUNNEL_ENCAP) {
			/* dst_fid is PF's fid */
			actions->dst_fid = bp->pf.fw_fid;
		} else {
			/* find the FID from dst_dev */
			actions->dst_fid =
				bnxt_flow_get_dst_fid(bp, actions->dst_dev);
			if (actions->dst_fid == BNXT_FID_INVALID)
				return -EINVAL;
		}
	}

	return 0;
}

#define GET_KEY(flow_cmd, key_type)					\
		skb_flow_dissector_target((flow_cmd)->dissector, key_type,\
					  (flow_cmd)->key)
#define GET_MASK(flow_cmd, key_type)					\
		skb_flow_dissector_target((flow_cmd)->dissector, key_type,\
					  (flow_cmd)->mask)

static int bnxt_tc_parse_flow(struct bnxt *bp,
			      struct tc_cls_flower_offload *tc_flow_cmd,
			      struct bnxt_tc_flow *flow)
{
	struct flow_dissector *dissector = tc_flow_cmd->dissector;
	u16 addr_type = 0;

	/* KEY_CONTROL and KEY_BASIC are needed for forming a meaningful key */
	if ((dissector->used_keys & BIT(FLOW_DISSECTOR_KEY_CONTROL)) == 0 ||
	    (dissector->used_keys & BIT(FLOW_DISSECTOR_KEY_BASIC)) == 0) {
		netdev_info(bp->dev, "cannot form TC key: used_keys = 0x%x",
			    dissector->used_keys);
		return -EOPNOTSUPP;
	}

	if (dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_CONTROL)) {
		struct flow_dissector_key_control *key =
			GET_KEY(tc_flow_cmd, FLOW_DISSECTOR_KEY_CONTROL);

		addr_type = key->addr_type;
	}

	if (dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_BASIC)) {
		struct flow_dissector_key_basic *key =
			GET_KEY(tc_flow_cmd, FLOW_DISSECTOR_KEY_BASIC);
		struct flow_dissector_key_basic *mask =
			GET_MASK(tc_flow_cmd, FLOW_DISSECTOR_KEY_BASIC);

		flow->l2_key.ether_type = key->n_proto;
		flow->l2_mask.ether_type = mask->n_proto;

		if (key->n_proto == htons(ETH_P_IP) ||
		    key->n_proto == htons(ETH_P_IPV6)) {
			flow->l4_key.ip_proto = key->ip_proto;
			flow->l4_mask.ip_proto = mask->ip_proto;
		}
	}

	if (dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
		struct flow_dissector_key_eth_addrs *key =
			GET_KEY(tc_flow_cmd, FLOW_DISSECTOR_KEY_ETH_ADDRS);
		struct flow_dissector_key_eth_addrs *mask =
			GET_MASK(tc_flow_cmd, FLOW_DISSECTOR_KEY_ETH_ADDRS);

		flow->flags |= BNXT_TC_FLOW_FLAGS_ETH_ADDRS;
		ether_addr_copy(flow->l2_key.dmac, key->dst);
		ether_addr_copy(flow->l2_mask.dmac, mask->dst);
		ether_addr_copy(flow->l2_key.smac, key->src);
		ether_addr_copy(flow->l2_mask.smac, mask->src);
	}

	if (dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_VLAN)) {
		struct flow_dissector_key_vlan *key =
			GET_KEY(tc_flow_cmd, FLOW_DISSECTOR_KEY_VLAN);
		struct flow_dissector_key_vlan *mask =
			GET_MASK(tc_flow_cmd, FLOW_DISSECTOR_KEY_VLAN);

		flow->l2_key.inner_vlan_tci =
		   cpu_to_be16(VLAN_TCI(key->vlan_id, key->vlan_priority));
		flow->l2_mask.inner_vlan_tci =
		   cpu_to_be16((VLAN_TCI(mask->vlan_id, mask->vlan_priority)));
		flow->l2_key.inner_vlan_tpid = htons(ETH_P_8021Q);
		flow->l2_mask.inner_vlan_tpid = htons(0xffff);
		flow->l2_key.num_vlans = 1;
	}

	if (dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_IPV4_ADDRS)) {
		struct flow_dissector_key_ipv4_addrs *key =
			GET_KEY(tc_flow_cmd, FLOW_DISSECTOR_KEY_IPV4_ADDRS);
		struct flow_dissector_key_ipv4_addrs *mask =
			GET_MASK(tc_flow_cmd, FLOW_DISSECTOR_KEY_IPV4_ADDRS);

		flow->flags |= BNXT_TC_FLOW_FLAGS_IPV4_ADDRS;
		flow->l3_key.ipv4.daddr.s_addr = key->dst;
		flow->l3_mask.ipv4.daddr.s_addr = mask->dst;
		flow->l3_key.ipv4.saddr.s_addr = key->src;
		flow->l3_mask.ipv4.saddr.s_addr = mask->src;
	} else if (dissector_uses_key(dissector,
				      FLOW_DISSECTOR_KEY_IPV6_ADDRS)) {
		struct flow_dissector_key_ipv6_addrs *key =
			GET_KEY(tc_flow_cmd, FLOW_DISSECTOR_KEY_IPV6_ADDRS);
		struct flow_dissector_key_ipv6_addrs *mask =
			GET_MASK(tc_flow_cmd, FLOW_DISSECTOR_KEY_IPV6_ADDRS);

		flow->flags |= BNXT_TC_FLOW_FLAGS_IPV6_ADDRS;
		flow->l3_key.ipv6.daddr = key->dst;
		flow->l3_mask.ipv6.daddr = mask->dst;
		flow->l3_key.ipv6.saddr = key->src;
		flow->l3_mask.ipv6.saddr = mask->src;
	}

	if (dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_PORTS)) {
		struct flow_dissector_key_ports *key =
			GET_KEY(tc_flow_cmd, FLOW_DISSECTOR_KEY_PORTS);
		struct flow_dissector_key_ports *mask =
			GET_MASK(tc_flow_cmd, FLOW_DISSECTOR_KEY_PORTS);

		flow->flags |= BNXT_TC_FLOW_FLAGS_PORTS;
		flow->l4_key.ports.dport = key->dst;
		flow->l4_mask.ports.dport = mask->dst;
		flow->l4_key.ports.sport = key->src;
		flow->l4_mask.ports.sport = mask->src;
	}

	if (dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_ICMP)) {
		struct flow_dissector_key_icmp *key =
			GET_KEY(tc_flow_cmd, FLOW_DISSECTOR_KEY_ICMP);
		struct flow_dissector_key_icmp *mask =
			GET_MASK(tc_flow_cmd, FLOW_DISSECTOR_KEY_ICMP);

		flow->flags |= BNXT_TC_FLOW_FLAGS_ICMP;
		flow->l4_key.icmp.type = key->type;
		flow->l4_key.icmp.code = key->code;
		flow->l4_mask.icmp.type = mask->type;
		flow->l4_mask.icmp.code = mask->code;
	}

	if (dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_ENC_CONTROL)) {
		struct flow_dissector_key_control *key =
			GET_KEY(tc_flow_cmd, FLOW_DISSECTOR_KEY_ENC_CONTROL);

		addr_type = key->addr_type;
	}

	if (dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS)) {
		struct flow_dissector_key_ipv4_addrs *key =
			GET_KEY(tc_flow_cmd, FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS);
		struct flow_dissector_key_ipv4_addrs *mask =
				GET_MASK(tc_flow_cmd,
					 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS);

		flow->flags |= BNXT_TC_FLOW_FLAGS_TUNL_IPV4_ADDRS;
		flow->tun_key.u.ipv4.dst = key->dst;
		flow->tun_mask.u.ipv4.dst = mask->dst;
		flow->tun_key.u.ipv4.src = key->src;
		flow->tun_mask.u.ipv4.src = mask->src;
	} else if (dissector_uses_key(dissector,
				      FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS)) {
		return -EOPNOTSUPP;
	}

	if (dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_ENC_KEYID)) {
		struct flow_dissector_key_keyid *key =
			GET_KEY(tc_flow_cmd, FLOW_DISSECTOR_KEY_ENC_KEYID);
		struct flow_dissector_key_keyid *mask =
			GET_MASK(tc_flow_cmd, FLOW_DISSECTOR_KEY_ENC_KEYID);

		flow->flags |= BNXT_TC_FLOW_FLAGS_TUNL_ID;
		flow->tun_key.tun_id = key32_to_tunnel_id(key->keyid);
		flow->tun_mask.tun_id = key32_to_tunnel_id(mask->keyid);
	}

	if (dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_ENC_PORTS)) {
		struct flow_dissector_key_ports *key =
			GET_KEY(tc_flow_cmd, FLOW_DISSECTOR_KEY_ENC_PORTS);
		struct flow_dissector_key_ports *mask =
			GET_MASK(tc_flow_cmd, FLOW_DISSECTOR_KEY_ENC_PORTS);

		flow->flags |= BNXT_TC_FLOW_FLAGS_TUNL_PORTS;
		flow->tun_key.tp_dst = key->dst;
		flow->tun_mask.tp_dst = mask->dst;
		flow->tun_key.tp_src = key->src;
		flow->tun_mask.tp_src = mask->src;
	}

	return bnxt_tc_parse_actions(bp, &flow->actions, tc_flow_cmd->exts);
}

static int bnxt_hwrm_cfa_flow_free(struct bnxt *bp, __le16 flow_handle)
{
	struct hwrm_cfa_flow_free_input req = { 0 };
	int rc;

	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_FLOW_FREE, -1, -1);
	req.flow_handle = flow_handle;

	rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
	if (rc)
		netdev_info(bp->dev, "Error: %s: flow_handle=0x%x rc=%d",
			    __func__, flow_handle, rc);

	if (rc)
		rc = -EIO;
	return rc;
}

static int ipv6_mask_len(struct in6_addr *mask)
{
	int mask_len = 0, i;

	for (i = 0; i < 4; i++)
		mask_len += inet_mask_len(mask->s6_addr32[i]);

	return mask_len;
}

static bool is_wildcard(void *mask, int len)
{
	const u8 *p = mask;
	int i;

	for (i = 0; i < len; i++) {
		if (p[i] != 0)
			return false;
	}
	return true;
}

static bool is_exactmatch(void *mask, int len)
{
	const u8 *p = mask;
	int i;

	for (i = 0; i < len; i++)
		if (p[i] != 0xff)
			return false;

	return true;
}

static bool bits_set(void *key, int len)
{
	const u8 *p = key;
	int i;

	for (i = 0; i < len; i++)
		if (p[i] != 0)
			return true;

	return false;
}

static int bnxt_hwrm_cfa_flow_alloc(struct bnxt *bp, struct bnxt_tc_flow *flow,
				    __le16 ref_flow_handle,
				    __le32 tunnel_handle, __le16 *flow_handle)
{
	struct hwrm_cfa_flow_alloc_output *resp = bp->hwrm_cmd_resp_addr;
	struct bnxt_tc_actions *actions = &flow->actions;
	struct bnxt_tc_l3_key *l3_mask = &flow->l3_mask;
	struct bnxt_tc_l3_key *l3_key = &flow->l3_key;
	struct hwrm_cfa_flow_alloc_input req = { 0 };
	u16 flow_flags = 0, action_flags = 0;
	int rc;

	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_FLOW_ALLOC, -1, -1);

	req.src_fid = cpu_to_le16(flow->src_fid);
	req.ref_flow_handle = ref_flow_handle;

	if (actions->flags & BNXT_TC_ACTION_FLAG_TUNNEL_DECAP ||
	    actions->flags & BNXT_TC_ACTION_FLAG_TUNNEL_ENCAP) {
		req.tunnel_handle = tunnel_handle;
		flow_flags |= CFA_FLOW_ALLOC_REQ_FLAGS_TUNNEL;
		action_flags |= CFA_FLOW_ALLOC_REQ_ACTION_FLAGS_TUNNEL;
	}

	req.ethertype = flow->l2_key.ether_type;
	req.ip_proto = flow->l4_key.ip_proto;

	if (flow->flags & BNXT_TC_FLOW_FLAGS_ETH_ADDRS) {
		memcpy(req.dmac, flow->l2_key.dmac, ETH_ALEN);
		memcpy(req.smac, flow->l2_key.smac, ETH_ALEN);
	}

	if (flow->l2_key.num_vlans > 0) {
		flow_flags |= CFA_FLOW_ALLOC_REQ_FLAGS_NUM_VLAN_ONE;
		/* FW expects the inner_vlan_tci value to be set
		 * in outer_vlan_tci when num_vlans is 1 (which is
		 * always the case in TC.)
		 */
		req.outer_vlan_tci = flow->l2_key.inner_vlan_tci;
	}

	/* If all IP and L4 fields are wildcarded then this is an L2 flow */
	if (is_wildcard(l3_mask, sizeof(*l3_mask)) &&
	    is_wildcard(&flow->l4_mask, sizeof(flow->l4_mask))) {
		flow_flags |= CFA_FLOW_ALLOC_REQ_FLAGS_FLOWTYPE_L2;
	} else {
		flow_flags |= flow->l2_key.ether_type == htons(ETH_P_IP) ?
				CFA_FLOW_ALLOC_REQ_FLAGS_FLOWTYPE_IPV4 :
				CFA_FLOW_ALLOC_REQ_FLAGS_FLOWTYPE_IPV6;

		if (flow->flags & BNXT_TC_FLOW_FLAGS_IPV4_ADDRS) {
			req.ip_dst[0] = l3_key->ipv4.daddr.s_addr;
			req.ip_dst_mask_len =
				inet_mask_len(l3_mask->ipv4.daddr.s_addr);
			req.ip_src[0] = l3_key->ipv4.saddr.s_addr;
			req.ip_src_mask_len =
				inet_mask_len(l3_mask->ipv4.saddr.s_addr);
		} else if (flow->flags & BNXT_TC_FLOW_FLAGS_IPV6_ADDRS) {
			memcpy(req.ip_dst, l3_key->ipv6.daddr.s6_addr32,
			       sizeof(req.ip_dst));
			req.ip_dst_mask_len =
					ipv6_mask_len(&l3_mask->ipv6.daddr);
			memcpy(req.ip_src, l3_key->ipv6.saddr.s6_addr32,
			       sizeof(req.ip_src));
			req.ip_src_mask_len =
					ipv6_mask_len(&l3_mask->ipv6.saddr);
		}
	}

	if (flow->flags & BNXT_TC_FLOW_FLAGS_PORTS) {
		req.l4_src_port = flow->l4_key.ports.sport;
		req.l4_src_port_mask = flow->l4_mask.ports.sport;
		req.l4_dst_port = flow->l4_key.ports.dport;
		req.l4_dst_port_mask = flow->l4_mask.ports.dport;
	} else if (flow->flags & BNXT_TC_FLOW_FLAGS_ICMP) {
		/* l4 ports serve as type/code when ip_proto is ICMP */
		req.l4_src_port = htons(flow->l4_key.icmp.type);
		req.l4_src_port_mask = htons(flow->l4_mask.icmp.type);
		req.l4_dst_port = htons(flow->l4_key.icmp.code);
		req.l4_dst_port_mask = htons(flow->l4_mask.icmp.code);
	}
	req.flags = cpu_to_le16(flow_flags);

	if (actions->flags & BNXT_TC_ACTION_FLAG_DROP) {
		action_flags |= CFA_FLOW_ALLOC_REQ_ACTION_FLAGS_DROP;
	} else {
		if (actions->flags & BNXT_TC_ACTION_FLAG_FWD) {
			action_flags |= CFA_FLOW_ALLOC_REQ_ACTION_FLAGS_FWD;
			req.dst_fid = cpu_to_le16(actions->dst_fid);
		}
		if (actions->flags & BNXT_TC_ACTION_FLAG_PUSH_VLAN) {
			action_flags |=
			    CFA_FLOW_ALLOC_REQ_ACTION_FLAGS_L2_HEADER_REWRITE;
			req.l2_rewrite_vlan_tpid = actions->push_vlan_tpid;
			req.l2_rewrite_vlan_tci = actions->push_vlan_tci;
			memcpy(&req.l2_rewrite_dmac, &req.dmac, ETH_ALEN);
			memcpy(&req.l2_rewrite_smac, &req.smac, ETH_ALEN);
		}
		if (actions->flags & BNXT_TC_ACTION_FLAG_POP_VLAN) {
			action_flags |=
			    CFA_FLOW_ALLOC_REQ_ACTION_FLAGS_L2_HEADER_REWRITE;
			/* Rewrite config with tpid = 0 implies vlan pop */
			req.l2_rewrite_vlan_tpid = 0;
			memcpy(&req.l2_rewrite_dmac, &req.dmac, ETH_ALEN);
			memcpy(&req.l2_rewrite_smac, &req.smac, ETH_ALEN);
		}
	}
	req.action_flags = cpu_to_le16(action_flags);

	mutex_lock(&bp->hwrm_cmd_lock);
	rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
	if (!rc)
		*flow_handle = resp->flow_handle;
	mutex_unlock(&bp->hwrm_cmd_lock);

	if (rc == HWRM_ERR_CODE_RESOURCE_ALLOC_ERROR)
		rc = -ENOSPC;
	else if (rc)
		rc = -EIO;
	return rc;
}

static int hwrm_cfa_decap_filter_alloc(struct bnxt *bp,
				       struct bnxt_tc_flow *flow,
				       struct bnxt_tc_l2_key *l2_info,
				       __le32 ref_decap_handle,
				       __le32 *decap_filter_handle)
{
	struct hwrm_cfa_decap_filter_alloc_output *resp =
						bp->hwrm_cmd_resp_addr;
	struct hwrm_cfa_decap_filter_alloc_input req = { 0 };
	struct ip_tunnel_key *tun_key = &flow->tun_key;
	u32 enables = 0;
	int rc;

	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_DECAP_FILTER_ALLOC, -1, -1);

	req.flags = cpu_to_le32(CFA_DECAP_FILTER_ALLOC_REQ_FLAGS_OVS_TUNNEL);
	enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_TUNNEL_TYPE |
		   CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_IP_PROTOCOL;
	req.tunnel_type = CFA_DECAP_FILTER_ALLOC_REQ_TUNNEL_TYPE_VXLAN;
	req.ip_protocol = CFA_DECAP_FILTER_ALLOC_REQ_IP_PROTOCOL_UDP;

	if (flow->flags & BNXT_TC_FLOW_FLAGS_TUNL_ID) {
		enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_TUNNEL_ID;
		/* tunnel_id is wrongly defined in hsi defn. as __le32 */
		req.tunnel_id = tunnel_id_to_key32(tun_key->tun_id);
	}

	if (flow->flags & BNXT_TC_FLOW_FLAGS_TUNL_ETH_ADDRS) {
		enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_DST_MACADDR;
		ether_addr_copy(req.dst_macaddr, l2_info->dmac);
	}
	if (l2_info->num_vlans) {
		enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_T_IVLAN_VID;
		req.t_ivlan_vid = l2_info->inner_vlan_tci;
	}

	enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_ETHERTYPE;
	req.ethertype = htons(ETH_P_IP);

	if (flow->flags & BNXT_TC_FLOW_FLAGS_TUNL_IPV4_ADDRS) {
		enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_SRC_IPADDR |
			   CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_DST_IPADDR |
			   CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_IPADDR_TYPE;
		req.ip_addr_type = CFA_DECAP_FILTER_ALLOC_REQ_IP_ADDR_TYPE_IPV4;
		req.dst_ipaddr[0] = tun_key->u.ipv4.dst;
		req.src_ipaddr[0] = tun_key->u.ipv4.src;
	}

	if (flow->flags & BNXT_TC_FLOW_FLAGS_TUNL_PORTS) {
		enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_DST_PORT;
		req.dst_port = tun_key->tp_dst;
	}

	/* Eventhough the decap_handle returned by hwrm_cfa_decap_filter_alloc
	 * is defined as __le32, l2_ctxt_ref_id is defined in HSI as __le16.
	 */
	req.l2_ctxt_ref_id = (__force __le16)ref_decap_handle;
	req.enables = cpu_to_le32(enables);

	mutex_lock(&bp->hwrm_cmd_lock);
	rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
	if (!rc)
		*decap_filter_handle = resp->decap_filter_id;
	else
		netdev_info(bp->dev, "%s: Error rc=%d", __func__, rc);
	mutex_unlock(&bp->hwrm_cmd_lock);

	if (rc)
		rc = -EIO;
	return rc;
}

static int hwrm_cfa_decap_filter_free(struct bnxt *bp,
				      __le32 decap_filter_handle)
{
	struct hwrm_cfa_decap_filter_free_input req = { 0 };
	int rc;

	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_DECAP_FILTER_FREE, -1, -1);
	req.decap_filter_id = decap_filter_handle;

	rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
	if (rc)
		netdev_info(bp->dev, "%s: Error rc=%d", __func__, rc);

	if (rc)
		rc = -EIO;
	return rc;
}

static int hwrm_cfa_encap_record_alloc(struct bnxt *bp,
				       struct ip_tunnel_key *encap_key,
				       struct bnxt_tc_l2_key *l2_info,
				       __le32 *encap_record_handle)
{
	struct hwrm_cfa_encap_record_alloc_output *resp =
						bp->hwrm_cmd_resp_addr;
	struct hwrm_cfa_encap_record_alloc_input req = { 0 };
	struct hwrm_cfa_encap_data_vxlan *encap =
			(struct hwrm_cfa_encap_data_vxlan *)&req.encap_data;
	struct hwrm_vxlan_ipv4_hdr *encap_ipv4 =
				(struct hwrm_vxlan_ipv4_hdr *)encap->l3;
	int rc;

	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_ENCAP_RECORD_ALLOC, -1, -1);

	req.encap_type = CFA_ENCAP_RECORD_ALLOC_REQ_ENCAP_TYPE_VXLAN;

	ether_addr_copy(encap->dst_mac_addr, l2_info->dmac);
	ether_addr_copy(encap->src_mac_addr, l2_info->smac);
	if (l2_info->num_vlans) {
		encap->num_vlan_tags = l2_info->num_vlans;
		encap->ovlan_tci = l2_info->inner_vlan_tci;
		encap->ovlan_tpid = l2_info->inner_vlan_tpid;
	}

	encap_ipv4->ver_hlen = 4 << VXLAN_IPV4_HDR_VER_HLEN_VERSION_SFT;
	encap_ipv4->ver_hlen |= 5 << VXLAN_IPV4_HDR_VER_HLEN_HEADER_LENGTH_SFT;
	encap_ipv4->ttl = encap_key->ttl;

	encap_ipv4->dest_ip_addr = encap_key->u.ipv4.dst;
	encap_ipv4->src_ip_addr = encap_key->u.ipv4.src;
	encap_ipv4->protocol = IPPROTO_UDP;

	encap->dst_port = encap_key->tp_dst;
	encap->vni = tunnel_id_to_key32(encap_key->tun_id);

	mutex_lock(&bp->hwrm_cmd_lock);
	rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
	if (!rc)
		*encap_record_handle = resp->encap_record_id;
	else
		netdev_info(bp->dev, "%s: Error rc=%d", __func__, rc);
	mutex_unlock(&bp->hwrm_cmd_lock);

	if (rc)
		rc = -EIO;
	return rc;
}

static int hwrm_cfa_encap_record_free(struct bnxt *bp,
				      __le32 encap_record_handle)
{
	struct hwrm_cfa_encap_record_free_input req = { 0 };
	int rc;

	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_ENCAP_RECORD_FREE, -1, -1);
	req.encap_record_id = encap_record_handle;

	rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
	if (rc)
		netdev_info(bp->dev, "%s: Error rc=%d", __func__, rc);

	if (rc)
		rc = -EIO;
	return rc;
}

static int bnxt_tc_put_l2_node(struct bnxt *bp,
			       struct bnxt_tc_flow_node *flow_node)
{
	struct bnxt_tc_l2_node *l2_node = flow_node->l2_node;
	struct bnxt_tc_info *tc_info = bp->tc_info;
	int rc;

	/* remove flow_node from the L2 shared flow list */
	list_del(&flow_node->l2_list_node);
	if (--l2_node->refcount == 0) {
		rc =  rhashtable_remove_fast(&tc_info->l2_table, &l2_node->node,
					     tc_info->l2_ht_params);
		if (rc)
			netdev_err(bp->dev,
				   "Error: %s: rhashtable_remove_fast: %d",
				   __func__, rc);
		kfree_rcu(l2_node, rcu);
	}
	return 0;
}

static struct bnxt_tc_l2_node *
bnxt_tc_get_l2_node(struct bnxt *bp, struct rhashtable *l2_table,
		    struct rhashtable_params ht_params,
		    struct bnxt_tc_l2_key *l2_key)
{
	struct bnxt_tc_l2_node *l2_node;
	int rc;

	l2_node = rhashtable_lookup_fast(l2_table, l2_key, ht_params);
	if (!l2_node) {
		l2_node = kzalloc(sizeof(*l2_node), GFP_KERNEL);
		if (!l2_node) {
			rc = -ENOMEM;
			return NULL;
		}

		l2_node->key = *l2_key;
		rc = rhashtable_insert_fast(l2_table, &l2_node->node,
					    ht_params);
		if (rc) {
			kfree_rcu(l2_node, rcu);
			netdev_err(bp->dev,
				   "Error: %s: rhashtable_insert_fast: %d",
				   __func__, rc);
			return NULL;
		}
		INIT_LIST_HEAD(&l2_node->common_l2_flows);
	}
	return l2_node;
}

/* Get the ref_flow_handle for a flow by checking if there are any other
 * flows that share the same L2 key as this flow.
 */
static int
bnxt_tc_get_ref_flow_handle(struct bnxt *bp, struct bnxt_tc_flow *flow,
			    struct bnxt_tc_flow_node *flow_node,
			    __le16 *ref_flow_handle)
{
	struct bnxt_tc_info *tc_info = bp->tc_info;
	struct bnxt_tc_flow_node *ref_flow_node;
	struct bnxt_tc_l2_node *l2_node;

	l2_node = bnxt_tc_get_l2_node(bp, &tc_info->l2_table,
				      tc_info->l2_ht_params,
				      &flow->l2_key);
	if (!l2_node)
		return -1;

	/* If any other flow is using this l2_node, use it's flow_handle
	 * as the ref_flow_handle
	 */
	if (l2_node->refcount > 0) {
		ref_flow_node = list_first_entry(&l2_node->common_l2_flows,
						 struct bnxt_tc_flow_node,
						 l2_list_node);
		*ref_flow_handle = ref_flow_node->flow_handle;
	} else {
		*ref_flow_handle = cpu_to_le16(0xffff);
	}

	/* Insert the l2_node into the flow_node so that subsequent flows
	 * with a matching l2 key can use the flow_handle of this flow
	 * as their ref_flow_handle
	 */
	flow_node->l2_node = l2_node;
	list_add(&flow_node->l2_list_node, &l2_node->common_l2_flows);
	l2_node->refcount++;
	return 0;
}

/* After the flow parsing is done, this routine is used for checking
 * if there are any aspects of the flow that prevent it from being
 * offloaded.
 */
static bool bnxt_tc_can_offload(struct bnxt *bp, struct bnxt_tc_flow *flow)
{
	/* If L4 ports are specified then ip_proto must be TCP or UDP */
	if ((flow->flags & BNXT_TC_FLOW_FLAGS_PORTS) &&
	    (flow->l4_key.ip_proto != IPPROTO_TCP &&
	     flow->l4_key.ip_proto != IPPROTO_UDP)) {
		netdev_info(bp->dev, "Cannot offload non-TCP/UDP (%d) ports",
			    flow->l4_key.ip_proto);
		return false;
	}

	/* Currently source/dest MAC cannot be partial wildcard  */
	if (bits_set(&flow->l2_key.smac, sizeof(flow->l2_key.smac)) &&
	    !is_exactmatch(flow->l2_mask.smac, sizeof(flow->l2_mask.smac))) {
		netdev_info(bp->dev, "Wildcard match unsupported for Source MAC\n");
		return false;
	}
	if (bits_set(&flow->l2_key.dmac, sizeof(flow->l2_key.dmac)) &&
	    !is_exactmatch(&flow->l2_mask.dmac, sizeof(flow->l2_mask.dmac))) {
		netdev_info(bp->dev, "Wildcard match unsupported for Dest MAC\n");
		return false;
	}

	/* Currently VLAN fields cannot be partial wildcard */
	if (bits_set(&flow->l2_key.inner_vlan_tci,
		     sizeof(flow->l2_key.inner_vlan_tci)) &&
	    !is_exactmatch(&flow->l2_mask.inner_vlan_tci,
			   sizeof(flow->l2_mask.inner_vlan_tci))) {
		netdev_info(bp->dev, "Wildcard match unsupported for VLAN TCI\n");
		return false;
	}
	if (bits_set(&flow->l2_key.inner_vlan_tpid,
		     sizeof(flow->l2_key.inner_vlan_tpid)) &&
	    !is_exactmatch(&flow->l2_mask.inner_vlan_tpid,
			   sizeof(flow->l2_mask.inner_vlan_tpid))) {
		netdev_info(bp->dev, "Wildcard match unsupported for VLAN TPID\n");
		return false;
	}

	/* Currently Ethertype must be set */
	if (!is_exactmatch(&flow->l2_mask.ether_type,
			   sizeof(flow->l2_mask.ether_type))) {
		netdev_info(bp->dev, "Wildcard match unsupported for Ethertype\n");
		return false;
	}

	return true;
}

/* Returns the final refcount of the node on success
 * or a -ve error code on failure
 */
static int bnxt_tc_put_tunnel_node(struct bnxt *bp,
				   struct rhashtable *tunnel_table,
				   struct rhashtable_params *ht_params,
				   struct bnxt_tc_tunnel_node *tunnel_node)
{
	int rc;

	if (--tunnel_node->refcount == 0) {
		rc =  rhashtable_remove_fast(tunnel_table, &tunnel_node->node,
					     *ht_params);
		if (rc) {
			netdev_err(bp->dev, "rhashtable_remove_fast rc=%d", rc);
			rc = -1;
		}
		kfree_rcu(tunnel_node, rcu);
		return rc;
	} else {
		return tunnel_node->refcount;
	}
}

/* Get (or add) either encap or decap tunnel node from/to the supplied
 * hash table.
 */
static struct bnxt_tc_tunnel_node *
bnxt_tc_get_tunnel_node(struct bnxt *bp, struct rhashtable *tunnel_table,
			struct rhashtable_params *ht_params,
			struct ip_tunnel_key *tun_key)
{
	struct bnxt_tc_tunnel_node *tunnel_node;
	int rc;

	tunnel_node = rhashtable_lookup_fast(tunnel_table, tun_key, *ht_params);
	if (!tunnel_node) {
		tunnel_node = kzalloc(sizeof(*tunnel_node), GFP_KERNEL);
		if (!tunnel_node) {
			rc = -ENOMEM;
			goto err;
		}

		tunnel_node->key = *tun_key;
		tunnel_node->tunnel_handle = INVALID_TUNNEL_HANDLE;
		rc = rhashtable_insert_fast(tunnel_table, &tunnel_node->node,
					    *ht_params);
		if (rc) {
			kfree_rcu(tunnel_node, rcu);
			goto err;
		}
	}
	tunnel_node->refcount++;
	return tunnel_node;
err:
	netdev_info(bp->dev, "error rc=%d", rc);
	return NULL;
}

static int bnxt_tc_get_ref_decap_handle(struct bnxt *bp,
					struct bnxt_tc_flow *flow,
					struct bnxt_tc_l2_key *l2_key,
					struct bnxt_tc_flow_node *flow_node,
					__le32 *ref_decap_handle)
{
	struct bnxt_tc_info *tc_info = bp->tc_info;
	struct bnxt_tc_flow_node *ref_flow_node;
	struct bnxt_tc_l2_node *decap_l2_node;

	decap_l2_node = bnxt_tc_get_l2_node(bp, &tc_info->decap_l2_table,
					    tc_info->decap_l2_ht_params,
					    l2_key);
	if (!decap_l2_node)
		return -1;

	/* If any other flow is using this decap_l2_node, use it's decap_handle
	 * as the ref_decap_handle
	 */
	if (decap_l2_node->refcount > 0) {
		ref_flow_node =
			list_first_entry(&decap_l2_node->common_l2_flows,
					 struct bnxt_tc_flow_node,
					 decap_l2_list_node);
		*ref_decap_handle = ref_flow_node->decap_node->tunnel_handle;
	} else {
		*ref_decap_handle = INVALID_TUNNEL_HANDLE;
	}

	/* Insert the l2_node into the flow_node so that subsequent flows
	 * with a matching decap l2 key can use the decap_filter_handle of
	 * this flow as their ref_decap_handle
	 */
	flow_node->decap_l2_node = decap_l2_node;
	list_add(&flow_node->decap_l2_list_node,
		 &decap_l2_node->common_l2_flows);
	decap_l2_node->refcount++;
	return 0;
}

static void bnxt_tc_put_decap_l2_node(struct bnxt *bp,
				      struct bnxt_tc_flow_node *flow_node)
{
	struct bnxt_tc_l2_node *decap_l2_node = flow_node->decap_l2_node;
	struct bnxt_tc_info *tc_info = bp->tc_info;
	int rc;

	/* remove flow_node from the decap L2 sharing flow list */
	list_del(&flow_node->decap_l2_list_node);
	if (--decap_l2_node->refcount == 0) {
		rc =  rhashtable_remove_fast(&tc_info->decap_l2_table,
					     &decap_l2_node->node,
					     tc_info->decap_l2_ht_params);
		if (rc)
			netdev_err(bp->dev, "rhashtable_remove_fast rc=%d", rc);
		kfree_rcu(decap_l2_node, rcu);
	}
}

static void bnxt_tc_put_decap_handle(struct bnxt *bp,
				     struct bnxt_tc_flow_node *flow_node)
{
	__le32 decap_handle = flow_node->decap_node->tunnel_handle;
	struct bnxt_tc_info *tc_info = bp->tc_info;
	int rc;

	if (flow_node->decap_l2_node)
		bnxt_tc_put_decap_l2_node(bp, flow_node);

	rc = bnxt_tc_put_tunnel_node(bp, &tc_info->decap_table,
				     &tc_info->decap_ht_params,
				     flow_node->decap_node);
	if (!rc && decap_handle != INVALID_TUNNEL_HANDLE)
		hwrm_cfa_decap_filter_free(bp, decap_handle);
}

static int bnxt_tc_resolve_tunnel_hdrs(struct bnxt *bp,
				       struct ip_tunnel_key *tun_key,
				       struct bnxt_tc_l2_key *l2_info)
{
#ifdef CONFIG_INET
	struct net_device *real_dst_dev = bp->dev;
	struct flowi4 flow = { {0} };
	struct net_device *dst_dev;
	struct neighbour *nbr;
	struct rtable *rt;
	int rc;

	flow.flowi4_proto = IPPROTO_UDP;
	flow.fl4_dport = tun_key->tp_dst;
	flow.daddr = tun_key->u.ipv4.dst;

	rt = ip_route_output_key(dev_net(real_dst_dev), &flow);
	if (IS_ERR(rt)) {
		netdev_info(bp->dev, "no route to %pI4b", &flow.daddr);
		return -EOPNOTSUPP;
	}

	/* The route must either point to the real_dst_dev or a dst_dev that
	 * uses the real_dst_dev.
	 */
	dst_dev = rt->dst.dev;
	if (is_vlan_dev(dst_dev)) {
#if IS_ENABLED(CONFIG_VLAN_8021Q)
		struct vlan_dev_priv *vlan = vlan_dev_priv(dst_dev);

		if (vlan->real_dev != real_dst_dev) {
			netdev_info(bp->dev,
				    "dst_dev(%s) doesn't use PF-if(%s)",
				    netdev_name(dst_dev),
				    netdev_name(real_dst_dev));
			rc = -EOPNOTSUPP;
			goto put_rt;
		}
		l2_info->inner_vlan_tci = htons(vlan->vlan_id);
		l2_info->inner_vlan_tpid = vlan->vlan_proto;
		l2_info->num_vlans = 1;
#endif
	} else if (dst_dev != real_dst_dev) {
		netdev_info(bp->dev,
			    "dst_dev(%s) for %pI4b is not PF-if(%s)",
			    netdev_name(dst_dev), &flow.daddr,
			    netdev_name(real_dst_dev));
		rc = -EOPNOTSUPP;
		goto put_rt;
	}

	nbr = dst_neigh_lookup(&rt->dst, &flow.daddr);
	if (!nbr) {
		netdev_info(bp->dev, "can't lookup neighbor for %pI4b",
			    &flow.daddr);
		rc = -EOPNOTSUPP;
		goto put_rt;
	}

	tun_key->u.ipv4.src = flow.saddr;
	tun_key->ttl = ip4_dst_hoplimit(&rt->dst);
	neigh_ha_snapshot(l2_info->dmac, nbr, dst_dev);
	ether_addr_copy(l2_info->smac, dst_dev->dev_addr);
	neigh_release(nbr);
	ip_rt_put(rt);

	return 0;
put_rt:
	ip_rt_put(rt);
	return rc;
#else
	return -EOPNOTSUPP;
#endif
}

static int bnxt_tc_get_decap_handle(struct bnxt *bp, struct bnxt_tc_flow *flow,
				    struct bnxt_tc_flow_node *flow_node,
				    __le32 *decap_filter_handle)
{
	struct ip_tunnel_key *decap_key = &flow->tun_key;
	struct bnxt_tc_info *tc_info = bp->tc_info;
	struct bnxt_tc_l2_key l2_info = { {0} };
	struct bnxt_tc_tunnel_node *decap_node;
	struct ip_tunnel_key tun_key = { 0 };
	struct bnxt_tc_l2_key *decap_l2_info;
	__le32 ref_decap_handle;
	int rc;

	/* Check if there's another flow using the same tunnel decap.
	 * If not, add this tunnel to the table and resolve the other
	 * tunnel header fileds. Ignore src_port in the tunnel_key,
	 * since it is not required for decap filters.
	 */
	decap_key->tp_src = 0;
	decap_node = bnxt_tc_get_tunnel_node(bp, &tc_info->decap_table,
					     &tc_info->decap_ht_params,
					     decap_key);
	if (!decap_node)
		return -ENOMEM;

	flow_node->decap_node = decap_node;

	if (decap_node->tunnel_handle != INVALID_TUNNEL_HANDLE)
		goto done;

	/* Resolve the L2 fields for tunnel decap
	 * Resolve the route for remote vtep (saddr) of the decap key
	 * Find it's next-hop mac addrs
	 */
	tun_key.u.ipv4.dst = flow->tun_key.u.ipv4.src;
	tun_key.tp_dst = flow->tun_key.tp_dst;
	rc = bnxt_tc_resolve_tunnel_hdrs(bp, &tun_key, &l2_info);
	if (rc)
		goto put_decap;

	decap_l2_info = &decap_node->l2_info;
	/* decap smac is wildcarded */
	ether_addr_copy(decap_l2_info->dmac, l2_info.smac);
	if (l2_info.num_vlans) {
		decap_l2_info->num_vlans = l2_info.num_vlans;
		decap_l2_info->inner_vlan_tpid = l2_info.inner_vlan_tpid;
		decap_l2_info->inner_vlan_tci = l2_info.inner_vlan_tci;
	}
	flow->flags |= BNXT_TC_FLOW_FLAGS_TUNL_ETH_ADDRS;

	/* For getting a decap_filter_handle we first need to check if
	 * there are any other decap flows that share the same tunnel L2
	 * key and if so, pass that flow's decap_filter_handle as the
	 * ref_decap_handle for this flow.
	 */
	rc = bnxt_tc_get_ref_decap_handle(bp, flow, decap_l2_info, flow_node,
					  &ref_decap_handle);
	if (rc)
		goto put_decap;

	/* Issue the hwrm cmd to allocate a decap filter handle */
	rc = hwrm_cfa_decap_filter_alloc(bp, flow, decap_l2_info,
					 ref_decap_handle,
					 &decap_node->tunnel_handle);
	if (rc)
		goto put_decap_l2;

done:
	*decap_filter_handle = decap_node->tunnel_handle;
	return 0;

put_decap_l2:
	bnxt_tc_put_decap_l2_node(bp, flow_node);
put_decap:
	bnxt_tc_put_tunnel_node(bp, &tc_info->decap_table,
				&tc_info->decap_ht_params,
				flow_node->decap_node);
	return rc;
}

static void bnxt_tc_put_encap_handle(struct bnxt *bp,
				     struct bnxt_tc_tunnel_node *encap_node)
{
	__le32 encap_handle = encap_node->tunnel_handle;
	struct bnxt_tc_info *tc_info = bp->tc_info;
	int rc;

	rc = bnxt_tc_put_tunnel_node(bp, &tc_info->encap_table,
				     &tc_info->encap_ht_params, encap_node);
	if (!rc && encap_handle != INVALID_TUNNEL_HANDLE)
		hwrm_cfa_encap_record_free(bp, encap_handle);
}

/* Lookup the tunnel encap table and check if there's an encap_handle
 * alloc'd already.
 * If not, query L2 info via a route lookup and issue an encap_record_alloc
 * cmd to FW.
 */
static int bnxt_tc_get_encap_handle(struct bnxt *bp, struct bnxt_tc_flow *flow,
				    struct bnxt_tc_flow_node *flow_node,
				    __le32 *encap_handle)
{
	struct ip_tunnel_key *encap_key = &flow->actions.tun_encap_key;
	struct bnxt_tc_info *tc_info = bp->tc_info;
	struct bnxt_tc_tunnel_node *encap_node;
	int rc;

	/* Check if there's another flow using the same tunnel encap.
	 * If not, add this tunnel to the table and resolve the other
	 * tunnel header fileds
	 */
	encap_node = bnxt_tc_get_tunnel_node(bp, &tc_info->encap_table,
					     &tc_info->encap_ht_params,
					     encap_key);
	if (!encap_node)
		return -ENOMEM;

	flow_node->encap_node = encap_node;

	if (encap_node->tunnel_handle != INVALID_TUNNEL_HANDLE)
		goto done;

	rc = bnxt_tc_resolve_tunnel_hdrs(bp, encap_key, &encap_node->l2_info);
	if (rc)
		goto put_encap;

	/* Allocate a new tunnel encap record */
	rc = hwrm_cfa_encap_record_alloc(bp, encap_key, &encap_node->l2_info,
					 &encap_node->tunnel_handle);
	if (rc)
		goto put_encap;

done:
	*encap_handle = encap_node->tunnel_handle;
	return 0;

put_encap:
	bnxt_tc_put_tunnel_node(bp, &tc_info->encap_table,
				&tc_info->encap_ht_params, encap_node);
	return rc;
}

static void bnxt_tc_put_tunnel_handle(struct bnxt *bp,
				      struct bnxt_tc_flow *flow,
				      struct bnxt_tc_flow_node *flow_node)
{
	if (flow->actions.flags & BNXT_TC_ACTION_FLAG_TUNNEL_DECAP)
		bnxt_tc_put_decap_handle(bp, flow_node);
	else if (flow->actions.flags & BNXT_TC_ACTION_FLAG_TUNNEL_ENCAP)
		bnxt_tc_put_encap_handle(bp, flow_node->encap_node);
}

static int bnxt_tc_get_tunnel_handle(struct bnxt *bp,
				     struct bnxt_tc_flow *flow,
				     struct bnxt_tc_flow_node *flow_node,
				     __le32 *tunnel_handle)
{
	if (flow->actions.flags & BNXT_TC_ACTION_FLAG_TUNNEL_DECAP)
		return bnxt_tc_get_decap_handle(bp, flow, flow_node,
						tunnel_handle);
	else if (flow->actions.flags & BNXT_TC_ACTION_FLAG_TUNNEL_ENCAP)
		return bnxt_tc_get_encap_handle(bp, flow, flow_node,
						tunnel_handle);
	else
		return 0;
}
static int __bnxt_tc_del_flow(struct bnxt *bp,
			      struct bnxt_tc_flow_node *flow_node)
{
	struct bnxt_tc_info *tc_info = bp->tc_info;
	int rc;

	/* send HWRM cmd to free the flow-id */
	bnxt_hwrm_cfa_flow_free(bp, flow_node->flow_handle);

	mutex_lock(&tc_info->lock);

	/* release references to any tunnel encap/decap nodes */
	bnxt_tc_put_tunnel_handle(bp, &flow_node->flow, flow_node);

	/* release reference to l2 node */
	bnxt_tc_put_l2_node(bp, flow_node);

	mutex_unlock(&tc_info->lock);

	rc = rhashtable_remove_fast(&tc_info->flow_table, &flow_node->node,
				    tc_info->flow_ht_params);
	if (rc)
		netdev_err(bp->dev, "Error: %s: rhashtable_remove_fast rc=%d",
			   __func__, rc);

	kfree_rcu(flow_node, rcu);
	return 0;
}

static void bnxt_tc_set_src_fid(struct bnxt *bp, struct bnxt_tc_flow *flow,
				u16 src_fid)
{
	if (flow->actions.flags & BNXT_TC_ACTION_FLAG_TUNNEL_DECAP)
		flow->src_fid = bp->pf.fw_fid;
	else
		flow->src_fid = src_fid;
}

/* Add a new flow or replace an existing flow.
 * Notes on locking:
 * There are essentially two critical sections here.
 * 1. while adding a new flow
 *    a) lookup l2-key
 *    b) issue HWRM cmd and get flow_handle
 *    c) link l2-key with flow
 * 2. while deleting a flow
 *    a) unlinking l2-key from flow
 * A lock is needed to protect these two critical sections.
 *
 * The hash-tables are already protected by the rhashtable API.
 */
static int bnxt_tc_add_flow(struct bnxt *bp, u16 src_fid,
			    struct tc_cls_flower_offload *tc_flow_cmd)
{
	struct bnxt_tc_flow_node *new_node, *old_node;
	struct bnxt_tc_info *tc_info = bp->tc_info;
	struct bnxt_tc_flow *flow;
	__le32 tunnel_handle = 0;
	__le16 ref_flow_handle;
	int rc;

	/* allocate memory for the new flow and it's node */
	new_node = kzalloc(sizeof(*new_node), GFP_KERNEL);
	if (!new_node) {
		rc = -ENOMEM;
		goto done;
	}
	new_node->cookie = tc_flow_cmd->cookie;
	flow = &new_node->flow;

	rc = bnxt_tc_parse_flow(bp, tc_flow_cmd, flow);
	if (rc)
		goto free_node;

	bnxt_tc_set_src_fid(bp, flow, src_fid);

	if (!bnxt_tc_can_offload(bp, flow)) {
		rc = -ENOSPC;
		goto free_node;
	}

	/* If a flow exists with the same cookie, delete it */
	old_node = rhashtable_lookup_fast(&tc_info->flow_table,
					  &tc_flow_cmd->cookie,
					  tc_info->flow_ht_params);
	if (old_node)
		__bnxt_tc_del_flow(bp, old_node);

	/* Check if the L2 part of the flow has been offloaded already.
	 * If so, bump up it's refcnt and get it's reference handle.
	 */
	mutex_lock(&tc_info->lock);
	rc = bnxt_tc_get_ref_flow_handle(bp, flow, new_node, &ref_flow_handle);
	if (rc)
		goto unlock;

	/* If the flow involves tunnel encap/decap, get tunnel_handle */
	rc = bnxt_tc_get_tunnel_handle(bp, flow, new_node, &tunnel_handle);
	if (rc)
		goto put_l2;

	/* send HWRM cmd to alloc the flow */
	rc = bnxt_hwrm_cfa_flow_alloc(bp, flow, ref_flow_handle,
				      tunnel_handle, &new_node->flow_handle);
	if (rc)
		goto put_tunnel;

	flow->lastused = jiffies;
	spin_lock_init(&flow->stats_lock);
	/* add new flow to flow-table */
	rc = rhashtable_insert_fast(&tc_info->flow_table, &new_node->node,
				    tc_info->flow_ht_params);
	if (rc)
		goto hwrm_flow_free;

	mutex_unlock(&tc_info->lock);
	return 0;

hwrm_flow_free:
	bnxt_hwrm_cfa_flow_free(bp, new_node->flow_handle);
put_tunnel:
	bnxt_tc_put_tunnel_handle(bp, flow, new_node);
put_l2:
	bnxt_tc_put_l2_node(bp, new_node);
unlock:
	mutex_unlock(&tc_info->lock);
free_node:
	kfree_rcu(new_node, rcu);
done:
	netdev_err(bp->dev, "Error: %s: cookie=0x%lx error=%d",
		   __func__, tc_flow_cmd->cookie, rc);
	return rc;
}

static int bnxt_tc_del_flow(struct bnxt *bp,
			    struct tc_cls_flower_offload *tc_flow_cmd)
{
	struct bnxt_tc_info *tc_info = bp->tc_info;
	struct bnxt_tc_flow_node *flow_node;

	flow_node = rhashtable_lookup_fast(&tc_info->flow_table,
					   &tc_flow_cmd->cookie,
					   tc_info->flow_ht_params);
	if (!flow_node)
		return -EINVAL;

	return __bnxt_tc_del_flow(bp, flow_node);
}

static int bnxt_tc_get_flow_stats(struct bnxt *bp,
				  struct tc_cls_flower_offload *tc_flow_cmd)
{
	struct bnxt_tc_flow_stats stats, *curr_stats, *prev_stats;
	struct bnxt_tc_info *tc_info = bp->tc_info;
	struct bnxt_tc_flow_node *flow_node;
	struct bnxt_tc_flow *flow;
	unsigned long lastused;

	flow_node = rhashtable_lookup_fast(&tc_info->flow_table,
					   &tc_flow_cmd->cookie,
					   tc_info->flow_ht_params);
	if (!flow_node)
		return -1;

	flow = &flow_node->flow;
	curr_stats = &flow->stats;
	prev_stats = &flow->prev_stats;

	spin_lock(&flow->stats_lock);
	stats.packets = curr_stats->packets - prev_stats->packets;
	stats.bytes = curr_stats->bytes - prev_stats->bytes;
	*prev_stats = *curr_stats;
	lastused = flow->lastused;
	spin_unlock(&flow->stats_lock);

	tcf_exts_stats_update(tc_flow_cmd->exts, stats.bytes, stats.packets,
			      lastused);
	return 0;
}

static int
bnxt_hwrm_cfa_flow_stats_get(struct bnxt *bp, int num_flows,
			     struct bnxt_tc_stats_batch stats_batch[])
{
	struct hwrm_cfa_flow_stats_output *resp = bp->hwrm_cmd_resp_addr;
	struct hwrm_cfa_flow_stats_input req = { 0 };
	__le16 *req_flow_handles = &req.flow_handle_0;
	int rc, i;

	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_FLOW_STATS, -1, -1);
	req.num_flows = cpu_to_le16(num_flows);
	for (i = 0; i < num_flows; i++) {
		struct bnxt_tc_flow_node *flow_node = stats_batch[i].flow_node;

		req_flow_handles[i] = flow_node->flow_handle;
	}

	mutex_lock(&bp->hwrm_cmd_lock);
	rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
	if (!rc) {
		__le64 *resp_packets = &resp->packet_0;
		__le64 *resp_bytes = &resp->byte_0;

		for (i = 0; i < num_flows; i++) {
			stats_batch[i].hw_stats.packets =
						le64_to_cpu(resp_packets[i]);
			stats_batch[i].hw_stats.bytes =
						le64_to_cpu(resp_bytes[i]);
		}
	} else {
		netdev_info(bp->dev, "error rc=%d", rc);
	}
	mutex_unlock(&bp->hwrm_cmd_lock);

	if (rc)
		rc = -EIO;
	return rc;
}

/* Add val to accum while handling a possible wraparound
 * of val. Eventhough val is of type u64, its actual width
 * is denoted by mask and will wrap-around beyond that width.
 */
static void accumulate_val(u64 *accum, u64 val, u64 mask)
{
#define low_bits(x, mask)		((x) & (mask))
#define high_bits(x, mask)		((x) & ~(mask))
	bool wrapped = val < low_bits(*accum, mask);

	*accum = high_bits(*accum, mask) + val;
	if (wrapped)
		*accum += (mask + 1);
}

/* The HW counters' width is much less than 64bits.
 * Handle possible wrap-around while updating the stat counters
 */
static void bnxt_flow_stats_accum(struct bnxt_tc_info *tc_info,
				  struct bnxt_tc_flow_stats *acc_stats,
				  struct bnxt_tc_flow_stats *hw_stats)
{
	accumulate_val(&acc_stats->bytes, hw_stats->bytes, tc_info->bytes_mask);
	accumulate_val(&acc_stats->packets, hw_stats->packets,
		       tc_info->packets_mask);
}

static int
bnxt_tc_flow_stats_batch_update(struct bnxt *bp, int num_flows,
				struct bnxt_tc_stats_batch stats_batch[])
{
	struct bnxt_tc_info *tc_info = bp->tc_info;
	int rc, i;

	rc = bnxt_hwrm_cfa_flow_stats_get(bp, num_flows, stats_batch);
	if (rc)
		return rc;

	for (i = 0; i < num_flows; i++) {
		struct bnxt_tc_flow_node *flow_node = stats_batch[i].flow_node;
		struct bnxt_tc_flow *flow = &flow_node->flow;

		spin_lock(&flow->stats_lock);
		bnxt_flow_stats_accum(tc_info, &flow->stats,
				      &stats_batch[i].hw_stats);
		if (flow->stats.packets != flow->prev_stats.packets)
			flow->lastused = jiffies;
		spin_unlock(&flow->stats_lock);
	}

	return 0;
}

static int
bnxt_tc_flow_stats_batch_prep(struct bnxt *bp,
			      struct bnxt_tc_stats_batch stats_batch[],
			      int *num_flows)
{
	struct bnxt_tc_info *tc_info = bp->tc_info;
	struct rhashtable_iter *iter = &tc_info->iter;
	void *flow_node;
	int rc, i;

	rhashtable_walk_start(iter);

	rc = 0;
	for (i = 0; i < BNXT_FLOW_STATS_BATCH_MAX; i++) {
		flow_node = rhashtable_walk_next(iter);
		if (IS_ERR(flow_node)) {
			i = 0;
			if (PTR_ERR(flow_node) == -EAGAIN) {
				continue;
			} else {
				rc = PTR_ERR(flow_node);
				goto done;
			}
		}

		/* No more flows */
		if (!flow_node)
			goto done;

		stats_batch[i].flow_node = flow_node;
	}
done:
	rhashtable_walk_stop(iter);
	*num_flows = i;
	return rc;
}

void bnxt_tc_flow_stats_work(struct bnxt *bp)
{
	struct bnxt_tc_info *tc_info = bp->tc_info;
	int num_flows, rc;

	num_flows = atomic_read(&tc_info->flow_table.nelems);
	if (!num_flows)
		return;

	rhashtable_walk_enter(&tc_info->flow_table, &tc_info->iter);

	for (;;) {
		rc = bnxt_tc_flow_stats_batch_prep(bp, tc_info->stats_batch,
						   &num_flows);
		if (rc) {
			if (rc == -EAGAIN)
				continue;
			break;
		}

		if (!num_flows)
			break;

		bnxt_tc_flow_stats_batch_update(bp, num_flows,
						tc_info->stats_batch);
	}

	rhashtable_walk_exit(&tc_info->iter);
}

int bnxt_tc_setup_flower(struct bnxt *bp, u16 src_fid,
			 struct tc_cls_flower_offload *cls_flower)
{
	int rc = 0;

	switch (cls_flower->command) {
	case TC_CLSFLOWER_REPLACE:
		rc = bnxt_tc_add_flow(bp, src_fid, cls_flower);
		break;

	case TC_CLSFLOWER_DESTROY:
		rc = bnxt_tc_del_flow(bp, cls_flower);
		break;

	case TC_CLSFLOWER_STATS:
		rc = bnxt_tc_get_flow_stats(bp, cls_flower);
		break;
	}
	return rc;
}

static const struct rhashtable_params bnxt_tc_flow_ht_params = {
	.head_offset = offsetof(struct bnxt_tc_flow_node, node),
	.key_offset = offsetof(struct bnxt_tc_flow_node, cookie),
	.key_len = sizeof(((struct bnxt_tc_flow_node *)0)->cookie),
	.automatic_shrinking = true
};

static const struct rhashtable_params bnxt_tc_l2_ht_params = {
	.head_offset = offsetof(struct bnxt_tc_l2_node, node),
	.key_offset = offsetof(struct bnxt_tc_l2_node, key),
	.key_len = BNXT_TC_L2_KEY_LEN,
	.automatic_shrinking = true
};

static const struct rhashtable_params bnxt_tc_decap_l2_ht_params = {
	.head_offset = offsetof(struct bnxt_tc_l2_node, node),
	.key_offset = offsetof(struct bnxt_tc_l2_node, key),
	.key_len = BNXT_TC_L2_KEY_LEN,
	.automatic_shrinking = true
};

static const struct rhashtable_params bnxt_tc_tunnel_ht_params = {
	.head_offset = offsetof(struct bnxt_tc_tunnel_node, node),
	.key_offset = offsetof(struct bnxt_tc_tunnel_node, key),
	.key_len = sizeof(struct ip_tunnel_key),
	.automatic_shrinking = true
};

/* convert counter width in bits to a mask */
#define mask(width)		((u64)~0 >> (64 - (width)))

int bnxt_init_tc(struct bnxt *bp)
{
	struct bnxt_tc_info *tc_info;
	int rc;

	if (bp->hwrm_spec_code < 0x10803) {
		netdev_warn(bp->dev,
			    "Firmware does not support TC flower offload.\n");
		return -ENOTSUPP;
	}

	tc_info = kzalloc(sizeof(*tc_info), GFP_KERNEL);
	if (!tc_info)
		return -ENOMEM;
	mutex_init(&tc_info->lock);

	/* Counter widths are programmed by FW */
	tc_info->bytes_mask = mask(36);
	tc_info->packets_mask = mask(28);

	tc_info->flow_ht_params = bnxt_tc_flow_ht_params;
	rc = rhashtable_init(&tc_info->flow_table, &tc_info->flow_ht_params);
	if (rc)
		goto free_tc_info;

	tc_info->l2_ht_params = bnxt_tc_l2_ht_params;
	rc = rhashtable_init(&tc_info->l2_table, &tc_info->l2_ht_params);
	if (rc)
		goto destroy_flow_table;

	tc_info->decap_l2_ht_params = bnxt_tc_decap_l2_ht_params;
	rc = rhashtable_init(&tc_info->decap_l2_table,
			     &tc_info->decap_l2_ht_params);
	if (rc)
		goto destroy_l2_table;

	tc_info->decap_ht_params = bnxt_tc_tunnel_ht_params;
	rc = rhashtable_init(&tc_info->decap_table,
			     &tc_info->decap_ht_params);
	if (rc)
		goto destroy_decap_l2_table;

	tc_info->encap_ht_params = bnxt_tc_tunnel_ht_params;
	rc = rhashtable_init(&tc_info->encap_table,
			     &tc_info->encap_ht_params);
	if (rc)
		goto destroy_decap_table;

	tc_info->enabled = true;
	bp->dev->hw_features |= NETIF_F_HW_TC;
	bp->dev->features |= NETIF_F_HW_TC;
	bp->tc_info = tc_info;
	return 0;

destroy_decap_table:
	rhashtable_destroy(&tc_info->decap_table);
destroy_decap_l2_table:
	rhashtable_destroy(&tc_info->decap_l2_table);
destroy_l2_table:
	rhashtable_destroy(&tc_info->l2_table);
destroy_flow_table:
	rhashtable_destroy(&tc_info->flow_table);
free_tc_info:
	kfree(tc_info);
	return rc;
}

void bnxt_shutdown_tc(struct bnxt *bp)
{
	struct bnxt_tc_info *tc_info = bp->tc_info;

	if (!bnxt_tc_flower_enabled(bp))
		return;

	rhashtable_destroy(&tc_info->flow_table);
	rhashtable_destroy(&tc_info->l2_table);
	rhashtable_destroy(&tc_info->decap_l2_table);
	rhashtable_destroy(&tc_info->decap_table);
	rhashtable_destroy(&tc_info->encap_table);
	kfree(tc_info);
	bp->tc_info = NULL;
}