aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/cxgb3/cxgb3_offload.c
blob: 805076c54f1b0cfbba1f780453c7e4c797c87a5a (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
/*
 * Copyright (c) 2006-2008 Chelsio, Inc. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <linux/list.h>
#include <linux/slab.h>
#include <net/neighbour.h>
#include <linux/notifier.h>
#include <linux/atomic.h>
#include <linux/proc_fs.h>
#include <linux/if_vlan.h>
#include <net/netevent.h>
#include <linux/highmem.h>
#include <linux/vmalloc.h>

#include "common.h"
#include "regs.h"
#include "cxgb3_ioctl.h"
#include "cxgb3_ctl_defs.h"
#include "cxgb3_defs.h"
#include "l2t.h"
#include "firmware_exports.h"
#include "cxgb3_offload.h"

static LIST_HEAD(client_list);
static LIST_HEAD(ofld_dev_list);
static DEFINE_MUTEX(cxgb3_db_lock);

static DEFINE_RWLOCK(adapter_list_lock);
static LIST_HEAD(adapter_list);

static const unsigned int MAX_ATIDS = 64 * 1024;
static const unsigned int ATID_BASE = 0x10000;

static void cxgb_neigh_update(struct neighbour *neigh);
static void cxgb_redirect(struct dst_entry *old, struct dst_entry *new);

static inline int offload_activated(struct t3cdev *tdev)
{
	const struct adapter *adapter = tdev2adap(tdev);

	return test_bit(OFFLOAD_DEVMAP_BIT, &adapter->open_device_map);
}

/**
 *	cxgb3_register_client - register an offload client
 *	@client: the client
 *
 *	Add the client to the client list,
 *	and call backs the client for each activated offload device
 */
void cxgb3_register_client(struct cxgb3_client *client)
{
	struct t3cdev *tdev;

	mutex_lock(&cxgb3_db_lock);
	list_add_tail(&client->client_list, &client_list);

	if (client->add) {
		list_for_each_entry(tdev, &ofld_dev_list, ofld_dev_list) {
			if (offload_activated(tdev))
				client->add(tdev);
		}
	}
	mutex_unlock(&cxgb3_db_lock);
}

EXPORT_SYMBOL(cxgb3_register_client);

/**
 *	cxgb3_unregister_client - unregister an offload client
 *	@client: the client
 *
 *	Remove the client to the client list,
 *	and call backs the client for each activated offload device.
 */
void cxgb3_unregister_client(struct cxgb3_client *client)
{
	struct t3cdev *tdev;

	mutex_lock(&cxgb3_db_lock);
	list_del(&client->client_list);

	if (client->remove) {
		list_for_each_entry(tdev, &ofld_dev_list, ofld_dev_list) {
			if (offload_activated(tdev))
				client->remove(tdev);
		}
	}
	mutex_unlock(&cxgb3_db_lock);
}

EXPORT_SYMBOL(cxgb3_unregister_client);

/**
 *	cxgb3_add_clients - activate registered clients for an offload device
 *	@tdev: the offload device
 *
 *	Call backs all registered clients once a offload device is activated
 */
void cxgb3_add_clients(struct t3cdev *tdev)
{
	struct cxgb3_client *client;

	mutex_lock(&cxgb3_db_lock);
	list_for_each_entry(client, &client_list, client_list) {
		if (client->add)
			client->add(tdev);
	}
	mutex_unlock(&cxgb3_db_lock);
}

/**
 *	cxgb3_remove_clients - deactivates registered clients
 *			       for an offload device
 *	@tdev: the offload device
 *
 *	Call backs all registered clients once a offload device is deactivated
 */
void cxgb3_remove_clients(struct t3cdev *tdev)
{
	struct cxgb3_client *client;

	mutex_lock(&cxgb3_db_lock);
	list_for_each_entry(client, &client_list, client_list) {
		if (client->remove)
			client->remove(tdev);
	}
	mutex_unlock(&cxgb3_db_lock);
}

void cxgb3_event_notify(struct t3cdev *tdev, u32 event, u32 port)
{
	struct cxgb3_client *client;

	mutex_lock(&cxgb3_db_lock);
	list_for_each_entry(client, &client_list, client_list) {
		if (client->event_handler)
			client->event_handler(tdev, event, port);
	}
	mutex_unlock(&cxgb3_db_lock);
}

static struct net_device *get_iff_from_mac(struct adapter *adapter,
					   const unsigned char *mac,
					   unsigned int vlan)
{
	int i;

	for_each_port(adapter, i) {
		struct net_device *dev = adapter->port[i];

		if (!memcmp(dev->dev_addr, mac, ETH_ALEN)) {
			if (vlan && vlan != VLAN_VID_MASK) {
				rcu_read_lock();
				dev = __vlan_find_dev_deep(dev, vlan);
				rcu_read_unlock();
			} else if (netif_is_bond_slave(dev)) {
				while (dev->master)
					dev = dev->master;
			}
			return dev;
		}
	}
	return NULL;
}

static int cxgb_ulp_iscsi_ctl(struct adapter *adapter, unsigned int req,
			      void *data)
{
	int i;
	int ret = 0;
	unsigned int val = 0;
	struct ulp_iscsi_info *uiip = data;

	switch (req) {
	case ULP_ISCSI_GET_PARAMS:
		uiip->pdev = adapter->pdev;
		uiip->llimit = t3_read_reg(adapter, A_ULPRX_ISCSI_LLIMIT);
		uiip->ulimit = t3_read_reg(adapter, A_ULPRX_ISCSI_ULIMIT);
		uiip->tagmask = t3_read_reg(adapter, A_ULPRX_ISCSI_TAGMASK);

		val = t3_read_reg(adapter, A_ULPRX_ISCSI_PSZ);
		for (i = 0; i < 4; i++, val >>= 8)
			uiip->pgsz_factor[i] = val & 0xFF;

		val = t3_read_reg(adapter, A_TP_PARA_REG7);
		uiip->max_txsz =
		uiip->max_rxsz = min((val >> S_PMMAXXFERLEN0)&M_PMMAXXFERLEN0,
				     (val >> S_PMMAXXFERLEN1)&M_PMMAXXFERLEN1);
		/*
		 * On tx, the iscsi pdu has to be <= tx page size and has to
		 * fit into the Tx PM FIFO.
		 */
		val = min(adapter->params.tp.tx_pg_size,
			  t3_read_reg(adapter, A_PM1_TX_CFG) >> 17);
		uiip->max_txsz = min(val, uiip->max_txsz);

		/* set MaxRxData to 16224 */
		val = t3_read_reg(adapter, A_TP_PARA_REG2);
		if ((val >> S_MAXRXDATA) != 0x3f60) {
			val &= (M_RXCOALESCESIZE << S_RXCOALESCESIZE);
			val |= V_MAXRXDATA(0x3f60);
			printk(KERN_INFO
				"%s, iscsi set MaxRxData to 16224 (0x%x).\n",
				adapter->name, val);
			t3_write_reg(adapter, A_TP_PARA_REG2, val);
		}

		/*
		 * on rx, the iscsi pdu has to be < rx page size and the
		 * the max rx data length programmed in TP
		 */
		val = min(adapter->params.tp.rx_pg_size,
			  ((t3_read_reg(adapter, A_TP_PARA_REG2)) >>
				S_MAXRXDATA) & M_MAXRXDATA);
		uiip->max_rxsz = min(val, uiip->max_rxsz);
		break;
	case ULP_ISCSI_SET_PARAMS:
		t3_write_reg(adapter, A_ULPRX_ISCSI_TAGMASK, uiip->tagmask);
		/* program the ddp page sizes */
		for (i = 0; i < 4; i++)
			val |= (uiip->pgsz_factor[i] & 0xF) << (8 * i);
		if (val && (val != t3_read_reg(adapter, A_ULPRX_ISCSI_PSZ))) {
			printk(KERN_INFO
				"%s, setting iscsi pgsz 0x%x, %u,%u,%u,%u.\n",
				adapter->name, val, uiip->pgsz_factor[0],
				uiip->pgsz_factor[1], uiip->pgsz_factor[2],
				uiip->pgsz_factor[3]);
			t3_write_reg(adapter, A_ULPRX_ISCSI_PSZ, val);
		}
		break;
	default:
		ret = -EOPNOTSUPP;
	}
	return ret;
}

/* Response queue used for RDMA events. */
#define ASYNC_NOTIF_RSPQ 0

static int cxgb_rdma_ctl(struct adapter *adapter, unsigned int req, void *data)
{
	int ret = 0;

	switch (req) {
	case RDMA_GET_PARAMS: {
		struct rdma_info *rdma = data;
		struct pci_dev *pdev = adapter->pdev;

		rdma->udbell_physbase = pci_resource_start(pdev, 2);
		rdma->udbell_len = pci_resource_len(pdev, 2);
		rdma->tpt_base =
			t3_read_reg(adapter, A_ULPTX_TPT_LLIMIT);
		rdma->tpt_top = t3_read_reg(adapter, A_ULPTX_TPT_ULIMIT);
		rdma->pbl_base =
			t3_read_reg(adapter, A_ULPTX_PBL_LLIMIT);
		rdma->pbl_top = t3_read_reg(adapter, A_ULPTX_PBL_ULIMIT);
		rdma->rqt_base = t3_read_reg(adapter, A_ULPRX_RQ_LLIMIT);
		rdma->rqt_top = t3_read_reg(adapter, A_ULPRX_RQ_ULIMIT);
		rdma->kdb_addr = adapter->regs + A_SG_KDOORBELL;
		rdma->pdev = pdev;
		break;
	}
	case RDMA_CQ_OP:{
		unsigned long flags;
		struct rdma_cq_op *rdma = data;

		/* may be called in any context */
		spin_lock_irqsave(&adapter->sge.reg_lock, flags);
		ret = t3_sge_cqcntxt_op(adapter, rdma->id, rdma->op,
					rdma->credits);
		spin_unlock_irqrestore(&adapter->sge.reg_lock, flags);
		break;
	}
	case RDMA_GET_MEM:{
		struct ch_mem_range *t = data;
		struct mc7 *mem;

		if ((t->addr & 7) || (t->len & 7))
			return -EINVAL;
		if (t->mem_id == MEM_CM)
			mem = &adapter->cm;
		else if (t->mem_id == MEM_PMRX)
			mem = &adapter->pmrx;
		else if (t->mem_id == MEM_PMTX)
			mem = &adapter->pmtx;
		else
			return -EINVAL;

		ret =
			t3_mc7_bd_read(mem, t->addr / 8, t->len / 8,
					(u64 *) t->buf);
		if (ret)
			return ret;
		break;
	}
	case RDMA_CQ_SETUP:{
		struct rdma_cq_setup *rdma = data;

		spin_lock_irq(&adapter->sge.reg_lock);
		ret =
			t3_sge_init_cqcntxt(adapter, rdma->id,
					rdma->base_addr, rdma->size,
					ASYNC_NOTIF_RSPQ,
					rdma->ovfl_mode, rdma->credits,
					rdma->credit_thres);
		spin_unlock_irq(&adapter->sge.reg_lock);
		break;
	}
	case RDMA_CQ_DISABLE:
		spin_lock_irq(&adapter->sge.reg_lock);
		ret = t3_sge_disable_cqcntxt(adapter, *(unsigned int *)data);
		spin_unlock_irq(&adapter->sge.reg_lock);
		break;
	case RDMA_CTRL_QP_SETUP:{
		struct rdma_ctrlqp_setup *rdma = data;

		spin_lock_irq(&adapter->sge.reg_lock);
		ret = t3_sge_init_ecntxt(adapter, FW_RI_SGEEC_START, 0,
						SGE_CNTXT_RDMA,
						ASYNC_NOTIF_RSPQ,
						rdma->base_addr, rdma->size,
						FW_RI_TID_START, 1, 0);
		spin_unlock_irq(&adapter->sge.reg_lock);
		break;
	}
	case RDMA_GET_MIB: {
		spin_lock(&adapter->stats_lock);
		t3_tp_get_mib_stats(adapter, (struct tp_mib_stats *)data);
		spin_unlock(&adapter->stats_lock);
		break;
	}
	default:
		ret = -EOPNOTSUPP;
	}
	return ret;
}

static int cxgb_offload_ctl(struct t3cdev *tdev, unsigned int req, void *data)
{
	struct adapter *adapter = tdev2adap(tdev);
	struct tid_range *tid;
	struct mtutab *mtup;
	struct iff_mac *iffmacp;
	struct ddp_params *ddpp;
	struct adap_ports *ports;
	struct ofld_page_info *rx_page_info;
	struct tp_params *tp = &adapter->params.tp;
	int i;

	switch (req) {
	case GET_MAX_OUTSTANDING_WR:
		*(unsigned int *)data = FW_WR_NUM;
		break;
	case GET_WR_LEN:
		*(unsigned int *)data = WR_FLITS;
		break;
	case GET_TX_MAX_CHUNK:
		*(unsigned int *)data = 1 << 20;	/* 1MB */
		break;
	case GET_TID_RANGE:
		tid = data;
		tid->num = t3_mc5_size(&adapter->mc5) -
		    adapter->params.mc5.nroutes -
		    adapter->params.mc5.nfilters - adapter->params.mc5.nservers;
		tid->base = 0;
		break;
	case GET_STID_RANGE:
		tid = data;
		tid->num = adapter->params.mc5.nservers;
		tid->base = t3_mc5_size(&adapter->mc5) - tid->num -
		    adapter->params.mc5.nfilters - adapter->params.mc5.nroutes;
		break;
	case GET_L2T_CAPACITY:
		*(unsigned int *)data = 2048;
		break;
	case GET_MTUS:
		mtup = data;
		mtup->size = NMTUS;
		mtup->mtus = adapter->params.mtus;
		break;
	case GET_IFF_FROM_MAC:
		iffmacp = data;
		iffmacp->dev = get_iff_from_mac(adapter, iffmacp->mac_addr,
						iffmacp->vlan_tag &
						VLAN_VID_MASK);
		break;
	case GET_DDP_PARAMS:
		ddpp = data;
		ddpp->llimit = t3_read_reg(adapter, A_ULPRX_TDDP_LLIMIT);
		ddpp->ulimit = t3_read_reg(adapter, A_ULPRX_TDDP_ULIMIT);
		ddpp->tag_mask = t3_read_reg(adapter, A_ULPRX_TDDP_TAGMASK);
		break;
	case GET_PORTS:
		ports = data;
		ports->nports = adapter->params.nports;
		for_each_port(adapter, i)
			ports->lldevs[i] = adapter->port[i];
		break;
	case ULP_ISCSI_GET_PARAMS:
	case ULP_ISCSI_SET_PARAMS:
		if (!offload_running(adapter))
			return -EAGAIN;
		return cxgb_ulp_iscsi_ctl(adapter, req, data);
	case RDMA_GET_PARAMS:
	case RDMA_CQ_OP:
	case RDMA_CQ_SETUP:
	case RDMA_CQ_DISABLE:
	case RDMA_CTRL_QP_SETUP:
	case RDMA_GET_MEM:
	case RDMA_GET_MIB:
		if (!offload_running(adapter))
			return -EAGAIN;
		return cxgb_rdma_ctl(adapter, req, data);
	case GET_RX_PAGE_INFO:
		rx_page_info = data;
		rx_page_info->page_size = tp->rx_pg_size;
		rx_page_info->num = tp->rx_num_pgs;
		break;
	case GET_ISCSI_IPV4ADDR: {
		struct iscsi_ipv4addr *p = data;
		struct port_info *pi = netdev_priv(p->dev);
		p->ipv4addr = pi->iscsi_ipv4addr;
		break;
	}
	case GET_EMBEDDED_INFO: {
		struct ch_embedded_info *e = data;

		spin_lock(&adapter->stats_lock);
		t3_get_fw_version(adapter, &e->fw_vers);
		t3_get_tp_version(adapter, &e->tp_vers);
		spin_unlock(&adapter->stats_lock);
		break;
	}
	default:
		return -EOPNOTSUPP;
	}
	return 0;
}

/*
 * Dummy handler for Rx offload packets in case we get an offload packet before
 * proper processing is setup.  This complains and drops the packet as it isn't
 * normal to get offload packets at this stage.
 */
static int rx_offload_blackhole(struct t3cdev *dev, struct sk_buff **skbs,
				int n)
{
	while (n--)
		dev_kfree_skb_any(skbs[n]);
	return 0;
}

static void dummy_neigh_update(struct t3cdev *dev, struct neighbour *neigh)
{
}

void cxgb3_set_dummy_ops(struct t3cdev *dev)
{
	dev->recv = rx_offload_blackhole;
	dev->neigh_update = dummy_neigh_update;
}

/*
 * Free an active-open TID.
 */
void *cxgb3_free_atid(struct t3cdev *tdev, int atid)
{
	struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
	union active_open_entry *p = atid2entry(t, atid);
	void *ctx = p->t3c_tid.ctx;

	spin_lock_bh(&t->atid_lock);
	p->next = t->afree;
	t->afree = p;
	t->atids_in_use--;
	spin_unlock_bh(&t->atid_lock);

	return ctx;
}

EXPORT_SYMBOL(cxgb3_free_atid);

/*
 * Free a server TID and return it to the free pool.
 */
void cxgb3_free_stid(struct t3cdev *tdev, int stid)
{
	struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
	union listen_entry *p = stid2entry(t, stid);

	spin_lock_bh(&t->stid_lock);
	p->next = t->sfree;
	t->sfree = p;
	t->stids_in_use--;
	spin_unlock_bh(&t->stid_lock);
}

EXPORT_SYMBOL(cxgb3_free_stid);

void cxgb3_insert_tid(struct t3cdev *tdev, struct cxgb3_client *client,
		      void *ctx, unsigned int tid)
{
	struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;

	t->tid_tab[tid].client = client;
	t->tid_tab[tid].ctx = ctx;
	atomic_inc(&t->tids_in_use);
}

EXPORT_SYMBOL(cxgb3_insert_tid);

/*
 * Populate a TID_RELEASE WR.  The skb must be already propely sized.
 */
static inline void mk_tid_release(struct sk_buff *skb, unsigned int tid)
{
	struct cpl_tid_release *req;

	skb->priority = CPL_PRIORITY_SETUP;
	req = (struct cpl_tid_release *)__skb_put(skb, sizeof(*req));
	req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
	OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, tid));
}

static void t3_process_tid_release_list(struct work_struct *work)
{
	struct t3c_data *td = container_of(work, struct t3c_data,
					   tid_release_task);
	struct sk_buff *skb;
	struct t3cdev *tdev = td->dev;


	spin_lock_bh(&td->tid_release_lock);
	while (td->tid_release_list) {
		struct t3c_tid_entry *p = td->tid_release_list;

		td->tid_release_list = p->ctx;
		spin_unlock_bh(&td->tid_release_lock);

		skb = alloc_skb(sizeof(struct cpl_tid_release),
				GFP_KERNEL);
		if (!skb)
			skb = td->nofail_skb;
		if (!skb) {
			spin_lock_bh(&td->tid_release_lock);
			p->ctx = (void *)td->tid_release_list;
			td->tid_release_list = (struct t3c_tid_entry *)p;
			break;
		}
		mk_tid_release(skb, p - td->tid_maps.tid_tab);
		cxgb3_ofld_send(tdev, skb);
		p->ctx = NULL;
		if (skb == td->nofail_skb)
			td->nofail_skb =
				alloc_skb(sizeof(struct cpl_tid_release),
					GFP_KERNEL);
		spin_lock_bh(&td->tid_release_lock);
	}
	td->release_list_incomplete = (td->tid_release_list == NULL) ? 0 : 1;
	spin_unlock_bh(&td->tid_release_lock);

	if (!td->nofail_skb)
		td->nofail_skb =
			alloc_skb(sizeof(struct cpl_tid_release),
				GFP_KERNEL);
}

/* use ctx as a next pointer in the tid release list */
void cxgb3_queue_tid_release(struct t3cdev *tdev, unsigned int tid)
{
	struct t3c_data *td = T3C_DATA(tdev);
	struct t3c_tid_entry *p = &td->tid_maps.tid_tab[tid];

	spin_lock_bh(&td->tid_release_lock);
	p->ctx = (void *)td->tid_release_list;
	p->client = NULL;
	td->tid_release_list = p;
	if (!p->ctx || td->release_list_incomplete)
		schedule_work(&td->tid_release_task);
	spin_unlock_bh(&td->tid_release_lock);
}

EXPORT_SYMBOL(cxgb3_queue_tid_release);

/*
 * Remove a tid from the TID table.  A client may defer processing its last
 * CPL message if it is locked at the time it arrives, and while the message
 * sits in the client's backlog the TID may be reused for another connection.
 * To handle this we atomically switch the TID association if it still points
 * to the original client context.
 */
void cxgb3_remove_tid(struct t3cdev *tdev, void *ctx, unsigned int tid)
{
	struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;

	BUG_ON(tid >= t->ntids);
	if (tdev->type == T3A)
		(void)cmpxchg(&t->tid_tab[tid].ctx, ctx, NULL);
	else {
		struct sk_buff *skb;

		skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_ATOMIC);
		if (likely(skb)) {
			mk_tid_release(skb, tid);
			cxgb3_ofld_send(tdev, skb);
			t->tid_tab[tid].ctx = NULL;
		} else
			cxgb3_queue_tid_release(tdev, tid);
	}
	atomic_dec(&t->tids_in_use);
}

EXPORT_SYMBOL(cxgb3_remove_tid);

int cxgb3_alloc_atid(struct t3cdev *tdev, struct cxgb3_client *client,
		     void *ctx)
{
	int atid = -1;
	struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;

	spin_lock_bh(&t->atid_lock);
	if (t->afree &&
	    t->atids_in_use + atomic_read(&t->tids_in_use) + MC5_MIN_TIDS <=
	    t->ntids) {
		union active_open_entry *p = t->afree;

		atid = (p - t->atid_tab) + t->atid_base;
		t->afree = p->next;
		p->t3c_tid.ctx = ctx;
		p->t3c_tid.client = client;
		t->atids_in_use++;
	}
	spin_unlock_bh(&t->atid_lock);
	return atid;
}

EXPORT_SYMBOL(cxgb3_alloc_atid);

int cxgb3_alloc_stid(struct t3cdev *tdev, struct cxgb3_client *client,
		     void *ctx)
{
	int stid = -1;
	struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;

	spin_lock_bh(&t->stid_lock);
	if (t->sfree) {
		union listen_entry *p = t->sfree;

		stid = (p - t->stid_tab) + t->stid_base;
		t->sfree = p->next;
		p->t3c_tid.ctx = ctx;
		p->t3c_tid.client = client;
		t->stids_in_use++;
	}
	spin_unlock_bh(&t->stid_lock);
	return stid;
}

EXPORT_SYMBOL(cxgb3_alloc_stid);

/* Get the t3cdev associated with a net_device */
struct t3cdev *dev2t3cdev(struct net_device *dev)
{
	const struct port_info *pi = netdev_priv(dev);

	return (struct t3cdev *)pi->adapter;
}

EXPORT_SYMBOL(dev2t3cdev);

static int do_smt_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
{
	struct cpl_smt_write_rpl *rpl = cplhdr(skb);

	if (rpl->status != CPL_ERR_NONE)
		printk(KERN_ERR
		       "Unexpected SMT_WRITE_RPL status %u for entry %u\n",
		       rpl->status, GET_TID(rpl));

	return CPL_RET_BUF_DONE;
}

static int do_l2t_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
{
	struct cpl_l2t_write_rpl *rpl = cplhdr(skb);

	if (rpl->status != CPL_ERR_NONE)
		printk(KERN_ERR
		       "Unexpected L2T_WRITE_RPL status %u for entry %u\n",
		       rpl->status, GET_TID(rpl));

	return CPL_RET_BUF_DONE;
}

static int do_rte_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
{
	struct cpl_rte_write_rpl *rpl = cplhdr(skb);

	if (rpl->status != CPL_ERR_NONE)
		printk(KERN_ERR
		       "Unexpected RTE_WRITE_RPL status %u for entry %u\n",
		       rpl->status, GET_TID(rpl));

	return CPL_RET_BUF_DONE;
}

static int do_act_open_rpl(struct t3cdev *dev, struct sk_buff *skb)
{
	struct cpl_act_open_rpl *rpl = cplhdr(skb);
	unsigned int atid = G_TID(ntohl(rpl->atid));
	struct t3c_tid_entry *t3c_tid;

	t3c_tid = lookup_atid(&(T3C_DATA(dev))->tid_maps, atid);
	if (t3c_tid && t3c_tid->ctx && t3c_tid->client &&
	    t3c_tid->client->handlers &&
	    t3c_tid->client->handlers[CPL_ACT_OPEN_RPL]) {
		return t3c_tid->client->handlers[CPL_ACT_OPEN_RPL] (dev, skb,
								    t3c_tid->
								    ctx);
	} else {
		printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
		       dev->name, CPL_ACT_OPEN_RPL);
		return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
	}
}

static int do_stid_rpl(struct t3cdev *dev, struct sk_buff *skb)
{
	union opcode_tid *p = cplhdr(skb);
	unsigned int stid = G_TID(ntohl(p->opcode_tid));
	struct t3c_tid_entry *t3c_tid;

	t3c_tid = lookup_stid(&(T3C_DATA(dev))->tid_maps, stid);
	if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
	    t3c_tid->client->handlers[p->opcode]) {
		return t3c_tid->client->handlers[p->opcode] (dev, skb,
							     t3c_tid->ctx);
	} else {
		printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
		       dev->name, p->opcode);
		return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
	}
}

static int do_hwtid_rpl(struct t3cdev *dev, struct sk_buff *skb)
{
	union opcode_tid *p = cplhdr(skb);
	unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
	struct t3c_tid_entry *t3c_tid;

	t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
	if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
	    t3c_tid->client->handlers[p->opcode]) {
		return t3c_tid->client->handlers[p->opcode]
		    (dev, skb, t3c_tid->ctx);
	} else {
		printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
		       dev->name, p->opcode);
		return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
	}
}

static int do_cr(struct t3cdev *dev, struct sk_buff *skb)
{
	struct cpl_pass_accept_req *req = cplhdr(skb);
	unsigned int stid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
	struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
	struct t3c_tid_entry *t3c_tid;
	unsigned int tid = GET_TID(req);

	if (unlikely(tid >= t->ntids)) {
		printk("%s: passive open TID %u too large\n",
		       dev->name, tid);
		t3_fatal_err(tdev2adap(dev));
		return CPL_RET_BUF_DONE;
	}

	t3c_tid = lookup_stid(t, stid);
	if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
	    t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]) {
		return t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]
		    (dev, skb, t3c_tid->ctx);
	} else {
		printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
		       dev->name, CPL_PASS_ACCEPT_REQ);
		return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
	}
}

/*
 * Returns an sk_buff for a reply CPL message of size len.  If the input
 * sk_buff has no other users it is trimmed and reused, otherwise a new buffer
 * is allocated.  The input skb must be of size at least len.  Note that this
 * operation does not destroy the original skb data even if it decides to reuse
 * the buffer.
 */
static struct sk_buff *cxgb3_get_cpl_reply_skb(struct sk_buff *skb, size_t len,
					       gfp_t gfp)
{
	if (likely(!skb_cloned(skb))) {
		BUG_ON(skb->len < len);
		__skb_trim(skb, len);
		skb_get(skb);
	} else {
		skb = alloc_skb(len, gfp);
		if (skb)
			__skb_put(skb, len);
	}
	return skb;
}

static int do_abort_req_rss(struct t3cdev *dev, struct sk_buff *skb)
{
	union opcode_tid *p = cplhdr(skb);
	unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
	struct t3c_tid_entry *t3c_tid;

	t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
	if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
	    t3c_tid->client->handlers[p->opcode]) {
		return t3c_tid->client->handlers[p->opcode]
		    (dev, skb, t3c_tid->ctx);
	} else {
		struct cpl_abort_req_rss *req = cplhdr(skb);
		struct cpl_abort_rpl *rpl;
		struct sk_buff *reply_skb;
		unsigned int tid = GET_TID(req);
		u8 cmd = req->status;

		if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
		    req->status == CPL_ERR_PERSIST_NEG_ADVICE)
			goto out;

		reply_skb = cxgb3_get_cpl_reply_skb(skb,
						    sizeof(struct
							   cpl_abort_rpl),
						    GFP_ATOMIC);

		if (!reply_skb) {
			printk("do_abort_req_rss: couldn't get skb!\n");
			goto out;
		}
		reply_skb->priority = CPL_PRIORITY_DATA;
		__skb_put(reply_skb, sizeof(struct cpl_abort_rpl));
		rpl = cplhdr(reply_skb);
		rpl->wr.wr_hi =
		    htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL));
		rpl->wr.wr_lo = htonl(V_WR_TID(tid));
		OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, tid));
		rpl->cmd = cmd;
		cxgb3_ofld_send(dev, reply_skb);
out:
		return CPL_RET_BUF_DONE;
	}
}

static int do_act_establish(struct t3cdev *dev, struct sk_buff *skb)
{
	struct cpl_act_establish *req = cplhdr(skb);
	unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
	struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
	struct t3c_tid_entry *t3c_tid;
	unsigned int tid = GET_TID(req);

	if (unlikely(tid >= t->ntids)) {
		printk("%s: active establish TID %u too large\n",
		       dev->name, tid);
		t3_fatal_err(tdev2adap(dev));
		return CPL_RET_BUF_DONE;
	}

	t3c_tid = lookup_atid(t, atid);
	if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
	    t3c_tid->client->handlers[CPL_ACT_ESTABLISH]) {
		return t3c_tid->client->handlers[CPL_ACT_ESTABLISH]
		    (dev, skb, t3c_tid->ctx);
	} else {
		printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
		       dev->name, CPL_ACT_ESTABLISH);
		return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
	}
}

static int do_trace(struct t3cdev *dev, struct sk_buff *skb)
{
	struct cpl_trace_pkt *p = cplhdr(skb);

	skb->protocol = htons(0xffff);
	skb->dev = dev->lldev;
	skb_pull(skb, sizeof(*p));
	skb_reset_mac_header(skb);
	netif_receive_skb(skb);
	return 0;
}

/*
 * That skb would better have come from process_responses() where we abuse
 * ->priority and ->csum to carry our data.  NB: if we get to per-arch
 * ->csum, the things might get really interesting here.
 */

static inline u32 get_hwtid(struct sk_buff *skb)
{
	return ntohl((__force __be32)skb->priority) >> 8 & 0xfffff;
}

static inline u32 get_opcode(struct sk_buff *skb)
{
	return G_OPCODE(ntohl((__force __be32)skb->csum));
}

static int do_term(struct t3cdev *dev, struct sk_buff *skb)
{
	unsigned int hwtid = get_hwtid(skb);
	unsigned int opcode = get_opcode(skb);
	struct t3c_tid_entry *t3c_tid;

	t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
	if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
	    t3c_tid->client->handlers[opcode]) {
		return t3c_tid->client->handlers[opcode] (dev, skb,
							  t3c_tid->ctx);
	} else {
		printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
		       dev->name, opcode);
		return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
	}
}

static int nb_callback(struct notifier_block *self, unsigned long event,
		       void *ctx)
{
	switch (event) {
	case (NETEVENT_NEIGH_UPDATE):{
		cxgb_neigh_update((struct neighbour *)ctx);
		break;
	}
	case (NETEVENT_REDIRECT):{
		struct netevent_redirect *nr = ctx;
		cxgb_redirect(nr->old, nr->new);
		cxgb_neigh_update(dst_get_neighbour(nr->new));
		break;
	}
	default:
		break;
	}
	return 0;
}

static struct notifier_block nb = {
	.notifier_call = nb_callback
};

/*
 * Process a received packet with an unknown/unexpected CPL opcode.
 */
static int do_bad_cpl(struct t3cdev *dev, struct sk_buff *skb)
{
	printk(KERN_ERR "%s: received bad CPL command 0x%x\n", dev->name,
	       *skb->data);
	return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
}

/*
 * Handlers for each CPL opcode
 */
static cpl_handler_func cpl_handlers[NUM_CPL_CMDS];

/*
 * Add a new handler to the CPL dispatch table.  A NULL handler may be supplied
 * to unregister an existing handler.
 */
void t3_register_cpl_handler(unsigned int opcode, cpl_handler_func h)
{
	if (opcode < NUM_CPL_CMDS)
		cpl_handlers[opcode] = h ? h : do_bad_cpl;
	else
		printk(KERN_ERR "T3C: handler registration for "
		       "opcode %x failed\n", opcode);
}

EXPORT_SYMBOL(t3_register_cpl_handler);

/*
 * T3CDEV's receive method.
 */
static int process_rx(struct t3cdev *dev, struct sk_buff **skbs, int n)
{
	while (n--) {
		struct sk_buff *skb = *skbs++;
		unsigned int opcode = get_opcode(skb);
		int ret = cpl_handlers[opcode] (dev, skb);

#if VALIDATE_TID
		if (ret & CPL_RET_UNKNOWN_TID) {
			union opcode_tid *p = cplhdr(skb);

			printk(KERN_ERR "%s: CPL message (opcode %u) had "
			       "unknown TID %u\n", dev->name, opcode,
			       G_TID(ntohl(p->opcode_tid)));
		}
#endif
		if (ret & CPL_RET_BUF_DONE)
			kfree_skb(skb);
	}
	return 0;
}

/*
 * Sends an sk_buff to a T3C driver after dealing with any active network taps.
 */
int cxgb3_ofld_send(struct t3cdev *dev, struct sk_buff *skb)
{
	int r;

	local_bh_disable();
	r = dev->send(dev, skb);
	local_bh_enable();
	return r;
}

EXPORT_SYMBOL(cxgb3_ofld_send);

static int is_offloading(struct net_device *dev)
{
	struct adapter *adapter;
	int i;

	read_lock_bh(&adapter_list_lock);
	list_for_each_entry(adapter, &adapter_list, adapter_list) {
		for_each_port(adapter, i) {
			if (dev == adapter->port[i]) {
				read_unlock_bh(&adapter_list_lock);
				return 1;
			}
		}
	}
	read_unlock_bh(&adapter_list_lock);
	return 0;
}

static void cxgb_neigh_update(struct neighbour *neigh)
{
	struct net_device *dev = neigh->dev;

	if (dev && (is_offloading(dev))) {
		struct t3cdev *tdev = dev2t3cdev(dev);

		BUG_ON(!tdev);
		t3_l2t_update(tdev, neigh);
	}
}

static void set_l2t_ix(struct t3cdev *tdev, u32 tid, struct l2t_entry *e)
{
	struct sk_buff *skb;
	struct cpl_set_tcb_field *req;

	skb = alloc_skb(sizeof(*req), GFP_ATOMIC);
	if (!skb) {
		printk(KERN_ERR "%s: cannot allocate skb!\n", __func__);
		return;
	}
	skb->priority = CPL_PRIORITY_CONTROL;
	req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req));
	req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
	OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
	req->reply = 0;
	req->cpu_idx = 0;
	req->word = htons(W_TCB_L2T_IX);
	req->mask = cpu_to_be64(V_TCB_L2T_IX(M_TCB_L2T_IX));
	req->val = cpu_to_be64(V_TCB_L2T_IX(e->idx));
	tdev->send(tdev, skb);
}

static void cxgb_redirect(struct dst_entry *old, struct dst_entry *new)
{
	struct net_device *olddev, *newdev;
	struct tid_info *ti;
	struct t3cdev *tdev;
	u32 tid;
	int update_tcb;
	struct l2t_entry *e;
	struct t3c_tid_entry *te;

	olddev = dst_get_neighbour(old)->dev;
	newdev = dst_get_neighbour(new)->dev;
	if (!is_offloading(olddev))
		return;
	if (!is_offloading(newdev)) {
		printk(KERN_WARNING "%s: Redirect to non-offload "
		       "device ignored.\n", __func__);
		return;
	}
	tdev = dev2t3cdev(olddev);
	BUG_ON(!tdev);
	if (tdev != dev2t3cdev(newdev)) {
		printk(KERN_WARNING "%s: Redirect to different "
		       "offload device ignored.\n", __func__);
		return;
	}

	/* Add new L2T entry */
	e = t3_l2t_get(tdev, dst_get_neighbour(new), newdev);
	if (!e) {
		printk(KERN_ERR "%s: couldn't allocate new l2t entry!\n",
		       __func__);
		return;
	}

	/* Walk tid table and notify clients of dst change. */
	ti = &(T3C_DATA(tdev))->tid_maps;
	for (tid = 0; tid < ti->ntids; tid++) {
		te = lookup_tid(ti, tid);
		BUG_ON(!te);
		if (te && te->ctx && te->client && te->client->redirect) {
			update_tcb = te->client->redirect(te->ctx, old, new, e);
			if (update_tcb) {
				l2t_hold(L2DATA(tdev), e);
				set_l2t_ix(tdev, tid, e);
			}
		}
	}
	l2t_release(L2DATA(tdev), e);
}

/*
 * Allocate a chunk of memory using kmalloc or, if that fails, vmalloc.
 * The allocated memory is cleared.
 */
void *cxgb_alloc_mem(unsigned long size)
{
	void *p = kzalloc(size, GFP_KERNEL);

	if (!p)
		p = vzalloc(size);
	return p;
}

/*
 * Free memory allocated through t3_alloc_mem().
 */
void cxgb_free_mem(void *addr)
{
	if (is_vmalloc_addr(addr))
		vfree(addr);
	else
		kfree(addr);
}

/*
 * Allocate and initialize the TID tables.  Returns 0 on success.
 */
static int init_tid_tabs(struct tid_info *t, unsigned int ntids,
			 unsigned int natids, unsigned int nstids,
			 unsigned int atid_base, unsigned int stid_base)
{
	unsigned long size = ntids * sizeof(*t->tid_tab) +
	    natids * sizeof(*t->atid_tab) + nstids * sizeof(*t->stid_tab);

	t->tid_tab = cxgb_alloc_mem(size);
	if (!t->tid_tab)
		return -ENOMEM;

	t->stid_tab = (union listen_entry *)&t->tid_tab[ntids];
	t->atid_tab = (union active_open_entry *)&t->stid_tab[nstids];
	t->ntids = ntids;
	t->nstids = nstids;
	t->stid_base = stid_base;
	t->sfree = NULL;
	t->natids = natids;
	t->atid_base = atid_base;
	t->afree = NULL;
	t->stids_in_use = t->atids_in_use = 0;
	atomic_set(&t->tids_in_use, 0);
	spin_lock_init(&t->stid_lock);
	spin_lock_init(&t->atid_lock);

	/*
	 * Setup the free lists for stid_tab and atid_tab.
	 */
	if (nstids) {
		while (--nstids)
			t->stid_tab[nstids - 1].next = &t->stid_tab[nstids];
		t->sfree = t->stid_tab;
	}
	if (natids) {
		while (--natids)
			t->atid_tab[natids - 1].next = &t->atid_tab[natids];
		t->afree = t->atid_tab;
	}
	return 0;
}

static void free_tid_maps(struct tid_info *t)
{
	cxgb_free_mem(t->tid_tab);
}

static inline void add_adapter(struct adapter *adap)
{
	write_lock_bh(&adapter_list_lock);
	list_add_tail(&adap->adapter_list, &adapter_list);
	write_unlock_bh(&adapter_list_lock);
}

static inline void remove_adapter(struct adapter *adap)
{
	write_lock_bh(&adapter_list_lock);
	list_del(&adap->adapter_list);
	write_unlock_bh(&adapter_list_lock);
}

int cxgb3_offload_activate(struct adapter *adapter)
{
	struct t3cdev *dev = &adapter->tdev;
	int natids, err;
	struct t3c_data *t;
	struct tid_range stid_range, tid_range;
	struct mtutab mtutab;
	unsigned int l2t_capacity;

	t = kzalloc(sizeof(*t), GFP_KERNEL);
	if (!t)
		return -ENOMEM;

	err = -EOPNOTSUPP;
	if (dev->ctl(dev, GET_TX_MAX_CHUNK, &t->tx_max_chunk) < 0 ||
	    dev->ctl(dev, GET_MAX_OUTSTANDING_WR, &t->max_wrs) < 0 ||
	    dev->ctl(dev, GET_L2T_CAPACITY, &l2t_capacity) < 0 ||
	    dev->ctl(dev, GET_MTUS, &mtutab) < 0 ||
	    dev->ctl(dev, GET_TID_RANGE, &tid_range) < 0 ||
	    dev->ctl(dev, GET_STID_RANGE, &stid_range) < 0)
		goto out_free;

	err = -ENOMEM;
	L2DATA(dev) = t3_init_l2t(l2t_capacity);
	if (!L2DATA(dev))
		goto out_free;

	natids = min(tid_range.num / 2, MAX_ATIDS);
	err = init_tid_tabs(&t->tid_maps, tid_range.num, natids,
			    stid_range.num, ATID_BASE, stid_range.base);
	if (err)
		goto out_free_l2t;

	t->mtus = mtutab.mtus;
	t->nmtus = mtutab.size;

	INIT_WORK(&t->tid_release_task, t3_process_tid_release_list);
	spin_lock_init(&t->tid_release_lock);
	INIT_LIST_HEAD(&t->list_node);
	t->dev = dev;

	T3C_DATA(dev) = t;
	dev->recv = process_rx;
	dev->neigh_update = t3_l2t_update;

	/* Register netevent handler once */
	if (list_empty(&adapter_list))
		register_netevent_notifier(&nb);

	t->nofail_skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_KERNEL);
	t->release_list_incomplete = 0;

	add_adapter(adapter);
	return 0;

out_free_l2t:
	t3_free_l2t(L2DATA(dev));
	L2DATA(dev) = NULL;
out_free:
	kfree(t);
	return err;
}

void cxgb3_offload_deactivate(struct adapter *adapter)
{
	struct t3cdev *tdev = &adapter->tdev;
	struct t3c_data *t = T3C_DATA(tdev);

	remove_adapter(adapter);
	if (list_empty(&adapter_list))
		unregister_netevent_notifier(&nb);

	free_tid_maps(&t->tid_maps);
	T3C_DATA(tdev) = NULL;
	t3_free_l2t(L2DATA(tdev));
	L2DATA(tdev) = NULL;
	if (t->nofail_skb)
		kfree_skb(t->nofail_skb);
	kfree(t);
}

static inline void register_tdev(struct t3cdev *tdev)
{
	static int unit;

	mutex_lock(&cxgb3_db_lock);
	snprintf(tdev->name, sizeof(tdev->name), "ofld_dev%d", unit++);
	list_add_tail(&tdev->ofld_dev_list, &ofld_dev_list);
	mutex_unlock(&cxgb3_db_lock);
}

static inline void unregister_tdev(struct t3cdev *tdev)
{
	mutex_lock(&cxgb3_db_lock);
	list_del(&tdev->ofld_dev_list);
	mutex_unlock(&cxgb3_db_lock);
}

static inline int adap2type(struct adapter *adapter)
{
	int type = 0;

	switch (adapter->params.rev) {
	case T3_REV_A:
		type = T3A;
		break;
	case T3_REV_B:
	case T3_REV_B2:
		type = T3B;
		break;
	case T3_REV_C:
		type = T3C;
		break;
	}
	return type;
}

void __devinit cxgb3_adapter_ofld(struct adapter *adapter)
{
	struct t3cdev *tdev = &adapter->tdev;

	INIT_LIST_HEAD(&tdev->ofld_dev_list);

	cxgb3_set_dummy_ops(tdev);
	tdev->send = t3_offload_tx;
	tdev->ctl = cxgb_offload_ctl;
	tdev->type = adap2type(adapter);

	register_tdev(tdev);
}

void __devexit cxgb3_adapter_unofld(struct adapter *adapter)
{
	struct t3cdev *tdev = &adapter->tdev;

	tdev->recv = NULL;
	tdev->neigh_update = NULL;

	unregister_tdev(tdev);
}

void __init cxgb3_offload_init(void)
{
	int i;

	for (i = 0; i < NUM_CPL_CMDS; ++i)
		cpl_handlers[i] = do_bad_cpl;

	t3_register_cpl_handler(CPL_SMT_WRITE_RPL, do_smt_write_rpl);
	t3_register_cpl_handler(CPL_L2T_WRITE_RPL, do_l2t_write_rpl);
	t3_register_cpl_handler(CPL_RTE_WRITE_RPL, do_rte_write_rpl);
	t3_register_cpl_handler(CPL_PASS_OPEN_RPL, do_stid_rpl);
	t3_register_cpl_handler(CPL_CLOSE_LISTSRV_RPL, do_stid_rpl);
	t3_register_cpl_handler(CPL_PASS_ACCEPT_REQ, do_cr);
	t3_register_cpl_handler(CPL_PASS_ESTABLISH, do_hwtid_rpl);
	t3_register_cpl_handler(CPL_ABORT_RPL_RSS, do_hwtid_rpl);
	t3_register_cpl_handler(CPL_ABORT_RPL, do_hwtid_rpl);
	t3_register_cpl_handler(CPL_RX_URG_NOTIFY, do_hwtid_rpl);
	t3_register_cpl_handler(CPL_RX_DATA, do_hwtid_rpl);
	t3_register_cpl_handler(CPL_TX_DATA_ACK, do_hwtid_rpl);
	t3_register_cpl_handler(CPL_TX_DMA_ACK, do_hwtid_rpl);
	t3_register_cpl_handler(CPL_ACT_OPEN_RPL, do_act_open_rpl);
	t3_register_cpl_handler(CPL_PEER_CLOSE, do_hwtid_rpl);
	t3_register_cpl_handler(CPL_CLOSE_CON_RPL, do_hwtid_rpl);
	t3_register_cpl_handler(CPL_ABORT_REQ_RSS, do_abort_req_rss);
	t3_register_cpl_handler(CPL_ACT_ESTABLISH, do_act_establish);
	t3_register_cpl_handler(CPL_SET_TCB_RPL, do_hwtid_rpl);
	t3_register_cpl_handler(CPL_GET_TCB_RPL, do_hwtid_rpl);
	t3_register_cpl_handler(CPL_RDMA_TERMINATE, do_term);
	t3_register_cpl_handler(CPL_RDMA_EC_STATUS, do_hwtid_rpl);
	t3_register_cpl_handler(CPL_TRACE_PKT, do_trace);
	t3_register_cpl_handler(CPL_RX_DATA_DDP, do_hwtid_rpl);
	t3_register_cpl_handler(CPL_RX_DDP_COMPLETE, do_hwtid_rpl);
	t3_register_cpl_handler(CPL_ISCSI_HDR, do_hwtid_rpl);
}

Privacy Policy