summaryrefslogtreecommitdiffstats
path: root/drivers/net/ethernet/sfc/efx.c
blob: e06fa89f2d7259feaaaad7ba69942f7ac907f22f (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
// SPDX-License-Identifier: GPL-2.0-only
/****************************************************************************
 * Driver for Solarflare network controllers and boards
 * Copyright 2005-2006 Fen Systems Ltd.
 * Copyright 2005-2013 Solarflare Communications Inc.
 */

#include <linux/module.h>
#include <linux/pci.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/delay.h>
#include <linux/notifier.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/in.h>
#include <linux/ethtool.h>
#include <linux/topology.h>
#include <linux/gfp.h>
#include <linux/aer.h>
#include <linux/interrupt.h>
#include "net_driver.h"
#include <net/gre.h>
#include <net/udp_tunnel.h>
#include "efx.h"
#include "efx_common.h"
#include "efx_channels.h"
#include "ef100.h"
#include "rx_common.h"
#include "tx_common.h"
#include "nic.h"
#include "io.h"
#include "selftest.h"
#include "sriov.h"

#include "mcdi.h"
#include "mcdi_pcol.h"
#include "workarounds.h"

/**************************************************************************
 *
 * Configurable values
 *
 *************************************************************************/

module_param_named(interrupt_mode, efx_interrupt_mode, uint, 0444);
MODULE_PARM_DESC(interrupt_mode,
		 "Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)");

module_param(rss_cpus, uint, 0444);
MODULE_PARM_DESC(rss_cpus, "Number of CPUs to use for Receive-Side Scaling");

/*
 * Use separate channels for TX and RX events
 *
 * Set this to 1 to use separate channels for TX and RX. It allows us
 * to control interrupt affinity separately for TX and RX.
 *
 * This is only used in MSI-X interrupt mode
 */
bool efx_separate_tx_channels;
module_param(efx_separate_tx_channels, bool, 0444);
MODULE_PARM_DESC(efx_separate_tx_channels,
		 "Use separate channels for TX and RX");

/* Initial interrupt moderation settings.  They can be modified after
 * module load with ethtool.
 *
 * The default for RX should strike a balance between increasing the
 * round-trip latency and reducing overhead.
 */
static unsigned int rx_irq_mod_usec = 60;

/* Initial interrupt moderation settings.  They can be modified after
 * module load with ethtool.
 *
 * This default is chosen to ensure that a 10G link does not go idle
 * while a TX queue is stopped after it has become full.  A queue is
 * restarted when it drops below half full.  The time this takes (assuming
 * worst case 3 descriptors per packet and 1024 descriptors) is
 *   512 / 3 * 1.2 = 205 usec.
 */
static unsigned int tx_irq_mod_usec = 150;

static bool phy_flash_cfg;
module_param(phy_flash_cfg, bool, 0644);
MODULE_PARM_DESC(phy_flash_cfg, "Set PHYs into reflash mode initially");

static unsigned debug = (NETIF_MSG_DRV | NETIF_MSG_PROBE |
			 NETIF_MSG_LINK | NETIF_MSG_IFDOWN |
			 NETIF_MSG_IFUP | NETIF_MSG_RX_ERR |
			 NETIF_MSG_TX_ERR | NETIF_MSG_HW);
module_param(debug, uint, 0);
MODULE_PARM_DESC(debug, "Bitmapped debugging message enable value");

/**************************************************************************
 *
 * Utility functions and prototypes
 *
 *************************************************************************/

static void efx_remove_port(struct efx_nic *efx);
static int efx_xdp_setup_prog(struct efx_nic *efx, struct bpf_prog *prog);
static int efx_xdp(struct net_device *dev, struct netdev_bpf *xdp);
static int efx_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **xdpfs,
			u32 flags);

#define EFX_ASSERT_RESET_SERIALISED(efx)		\
	do {						\
		if ((efx->state == STATE_READY) ||	\
		    (efx->state == STATE_RECOVERY) ||	\
		    (efx->state == STATE_DISABLED))	\
			ASSERT_RTNL();			\
	} while (0)

/**************************************************************************
 *
 * Port handling
 *
 **************************************************************************/

static void efx_fini_port(struct efx_nic *efx);

static int efx_probe_port(struct efx_nic *efx)
{
	int rc;

	netif_dbg(efx, probe, efx->net_dev, "create port\n");

	if (phy_flash_cfg)
		efx->phy_mode = PHY_MODE_SPECIAL;

	/* Connect up MAC/PHY operations table */
	rc = efx->type->probe_port(efx);
	if (rc)
		return rc;

	/* Initialise MAC address to permanent address */
	ether_addr_copy(efx->net_dev->dev_addr, efx->net_dev->perm_addr);

	return 0;
}

static int efx_init_port(struct efx_nic *efx)
{
	int rc;

	netif_dbg(efx, drv, efx->net_dev, "init port\n");

	mutex_lock(&efx->mac_lock);

	rc = efx->phy_op->init(efx);
	if (rc)
		goto fail1;

	efx->port_initialized = true;

	/* Ensure the PHY advertises the correct flow control settings */
	rc = efx->phy_op->reconfigure(efx);
	if (rc && rc != -EPERM)
		goto fail2;

	mutex_unlock(&efx->mac_lock);
	return 0;

fail2:
	efx->phy_op->fini(efx);
fail1:
	mutex_unlock(&efx->mac_lock);
	return rc;
}

static void efx_fini_port(struct efx_nic *efx)
{
	netif_dbg(efx, drv, efx->net_dev, "shut down port\n");

	if (!efx->port_initialized)
		return;

	efx->phy_op->fini(efx);
	efx->port_initialized = false;

	efx->link_state.up = false;
	efx_link_status_changed(efx);
}

static void efx_remove_port(struct efx_nic *efx)
{
	netif_dbg(efx, drv, efx->net_dev, "destroying port\n");

	efx->type->remove_port(efx);
}

/**************************************************************************
 *
 * NIC handling
 *
 **************************************************************************/

static LIST_HEAD(efx_primary_list);
static LIST_HEAD(efx_unassociated_list);

static bool efx_same_controller(struct efx_nic *left, struct efx_nic *right)
{
	return left->type == right->type &&
		left->vpd_sn && right->vpd_sn &&
		!strcmp(left->vpd_sn, right->vpd_sn);
}

static void efx_associate(struct efx_nic *efx)
{
	struct efx_nic *other, *next;

	if (efx->primary == efx) {
		/* Adding primary function; look for secondaries */

		netif_dbg(efx, probe, efx->net_dev, "adding to primary list\n");
		list_add_tail(&efx->node, &efx_primary_list);

		list_for_each_entry_safe(other, next, &efx_unassociated_list,
					 node) {
			if (efx_same_controller(efx, other)) {
				list_del(&other->node);
				netif_dbg(other, probe, other->net_dev,
					  "moving to secondary list of %s %s\n",
					  pci_name(efx->pci_dev),
					  efx->net_dev->name);
				list_add_tail(&other->node,
					      &efx->secondary_list);
				other->primary = efx;
			}
		}
	} else {
		/* Adding secondary function; look for primary */

		list_for_each_entry(other, &efx_primary_list, node) {
			if (efx_same_controller(efx, other)) {
				netif_dbg(efx, probe, efx->net_dev,
					  "adding to secondary list of %s %s\n",
					  pci_name(other->pci_dev),
					  other->net_dev->name);
				list_add_tail(&efx->node,
					      &other->secondary_list);
				efx->primary = other;
				return;
			}
		}

		netif_dbg(efx, probe, efx->net_dev,
			  "adding to unassociated list\n");
		list_add_tail(&efx->node, &efx_unassociated_list);
	}
}

static void efx_dissociate(struct efx_nic *efx)
{
	struct efx_nic *other, *next;

	list_del(&efx->node);
	efx->primary = NULL;

	list_for_each_entry_safe(other, next, &efx->secondary_list, node) {
		list_del(&other->node);
		netif_dbg(other, probe, other->net_dev,
			  "moving to unassociated list\n");
		list_add_tail(&other->node, &efx_unassociated_list);
		other->primary = NULL;
	}
}

static int efx_probe_nic(struct efx_nic *efx)
{
	int rc;

	netif_dbg(efx, probe, efx->net_dev, "creating NIC\n");

	/* Carry out hardware-type specific initialisation */
	rc = efx->type->probe(efx);
	if (rc)
		return rc;

	do {
		if (!efx->max_channels || !efx->max_tx_channels) {
			netif_err(efx, drv, efx->net_dev,
				  "Insufficient resources to allocate"
				  " any channels\n");
			rc = -ENOSPC;
			goto fail1;
		}

		/* Determine the number of channels and queues by trying
		 * to hook in MSI-X interrupts.
		 */
		rc = efx_probe_interrupts(efx);
		if (rc)
			goto fail1;

		rc = efx_set_channels(efx);
		if (rc)
			goto fail1;

		/* dimension_resources can fail with EAGAIN */
		rc = efx->type->dimension_resources(efx);
		if (rc != 0 && rc != -EAGAIN)
			goto fail2;

		if (rc == -EAGAIN)
			/* try again with new max_channels */
			efx_remove_interrupts(efx);

	} while (rc == -EAGAIN);

	if (efx->n_channels > 1)
		netdev_rss_key_fill(efx->rss_context.rx_hash_key,
				    sizeof(efx->rss_context.rx_hash_key));
	efx_set_default_rx_indir_table(efx, &efx->rss_context);

	/* Initialise the interrupt moderation settings */
	efx->irq_mod_step_us = DIV_ROUND_UP(efx->timer_quantum_ns, 1000);
	efx_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec, true,
				true);

	return 0;

fail2:
	efx_remove_interrupts(efx);
fail1:
	efx->type->remove(efx);
	return rc;
}

static void efx_remove_nic(struct efx_nic *efx)
{
	netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n");

	efx_remove_interrupts(efx);
	efx->type->remove(efx);
}

/**************************************************************************
 *
 * NIC startup/shutdown
 *
 *************************************************************************/

static int efx_probe_all(struct efx_nic *efx)
{
	int rc;

	rc = efx_probe_nic(efx);
	if (rc) {
		netif_err(efx, probe, efx->net_dev, "failed to create NIC\n");
		goto fail1;
	}

	rc = efx_probe_port(efx);
	if (rc) {
		netif_err(efx, probe, efx->net_dev, "failed to create port\n");
		goto fail2;
	}

	BUILD_BUG_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_RXQ_MIN_ENT);
	if (WARN_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_TXQ_MIN_ENT(efx))) {
		rc = -EINVAL;
		goto fail3;
	}

#ifdef CONFIG_SFC_SRIOV
	rc = efx->type->vswitching_probe(efx);
	if (rc) /* not fatal; the PF will still work fine */
		netif_warn(efx, probe, efx->net_dev,
			   "failed to setup vswitching rc=%d;"
			   " VFs may not function\n", rc);
#endif

	rc = efx_probe_filters(efx);
	if (rc) {
		netif_err(efx, probe, efx->net_dev,
			  "failed to create filter tables\n");
		goto fail4;
	}

	rc = efx_probe_channels(efx);
	if (rc)
		goto fail5;

	return 0;

 fail5:
	efx_remove_filters(efx);
 fail4:
#ifdef CONFIG_SFC_SRIOV
	efx->type->vswitching_remove(efx);
#endif
 fail3:
	efx_remove_port(efx);
 fail2:
	efx_remove_nic(efx);
 fail1:
	return rc;
}

static void efx_remove_all(struct efx_nic *efx)
{
	rtnl_lock();
	efx_xdp_setup_prog(efx, NULL);
	rtnl_unlock();

	efx_remove_channels(efx);
	efx_remove_filters(efx);
#ifdef CONFIG_SFC_SRIOV
	efx->type->vswitching_remove(efx);
#endif
	efx_remove_port(efx);
	efx_remove_nic(efx);
}

/**************************************************************************
 *
 * Interrupt moderation
 *
 **************************************************************************/
unsigned int efx_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs)
{
	if (usecs == 0)
		return 0;
	if (usecs * 1000 < efx->timer_quantum_ns)
		return 1; /* never round down to 0 */
	return usecs * 1000 / efx->timer_quantum_ns;
}

unsigned int efx_ticks_to_usecs(struct efx_nic *efx, unsigned int ticks)
{
	/* We must round up when converting ticks to microseconds
	 * because we round down when converting the other way.
	 */
	return DIV_ROUND_UP(ticks * efx->timer_quantum_ns, 1000);
}

/* Set interrupt moderation parameters */
int efx_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
			    unsigned int rx_usecs, bool rx_adaptive,
			    bool rx_may_override_tx)
{
	struct efx_channel *channel;
	unsigned int timer_max_us;

	EFX_ASSERT_RESET_SERIALISED(efx);

	timer_max_us = efx->timer_max_ns / 1000;

	if (tx_usecs > timer_max_us || rx_usecs > timer_max_us)
		return -EINVAL;

	if (tx_usecs != rx_usecs && efx->tx_channel_offset == 0 &&
	    !rx_may_override_tx) {
		netif_err(efx, drv, efx->net_dev, "Channels are shared. "
			  "RX and TX IRQ moderation must be equal\n");
		return -EINVAL;
	}

	efx->irq_rx_adaptive = rx_adaptive;
	efx->irq_rx_moderation_us = rx_usecs;
	efx_for_each_channel(channel, efx) {
		if (efx_channel_has_rx_queue(channel))
			channel->irq_moderation_us = rx_usecs;
		else if (efx_channel_has_tx_queues(channel))
			channel->irq_moderation_us = tx_usecs;
		else if (efx_channel_is_xdp_tx(channel))
			channel->irq_moderation_us = tx_usecs;
	}

	return 0;
}

void efx_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
			    unsigned int *rx_usecs, bool *rx_adaptive)
{
	*rx_adaptive = efx->irq_rx_adaptive;
	*rx_usecs = efx->irq_rx_moderation_us;

	/* If channels are shared between RX and TX, so is IRQ
	 * moderation.  Otherwise, IRQ moderation is the same for all
	 * TX channels and is not adaptive.
	 */
	if (efx->tx_channel_offset == 0) {
		*tx_usecs = *rx_usecs;
	} else {
		struct efx_channel *tx_channel;

		tx_channel = efx->channel[efx->tx_channel_offset];
		*tx_usecs = tx_channel->irq_moderation_us;
	}
}

/**************************************************************************
 *
 * ioctls
 *
 *************************************************************************/

/* Net device ioctl
 * Context: process, rtnl_lock() held.
 */
static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	struct mii_ioctl_data *data = if_mii(ifr);

	if (cmd == SIOCSHWTSTAMP)
		return efx_ptp_set_ts_config(efx, ifr);
	if (cmd == SIOCGHWTSTAMP)
		return efx_ptp_get_ts_config(efx, ifr);

	/* Convert phy_id from older PRTAD/DEVAD format */
	if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) &&
	    (data->phy_id & 0xfc00) == 0x0400)
		data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400;

	return mdio_mii_ioctl(&efx->mdio, data, cmd);
}

/**************************************************************************
 *
 * Kernel net device interface
 *
 *************************************************************************/

/* Context: process, rtnl_lock() held. */
int efx_net_open(struct net_device *net_dev)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	int rc;

	netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n",
		  raw_smp_processor_id());

	rc = efx_check_disabled(efx);
	if (rc)
		return rc;
	if (efx->phy_mode & PHY_MODE_SPECIAL)
		return -EBUSY;
	if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL))
		return -EIO;

	/* Notify the kernel of the link state polled during driver load,
	 * before the monitor starts running */
	efx_link_status_changed(efx);

	efx_start_all(efx);
	if (efx->state == STATE_DISABLED || efx->reset_pending)
		netif_device_detach(efx->net_dev);
	efx_selftest_async_start(efx);
	return 0;
}

/* Context: process, rtnl_lock() held.
 * Note that the kernel will ignore our return code; this method
 * should really be a void.
 */
int efx_net_stop(struct net_device *net_dev)
{
	struct efx_nic *efx = netdev_priv(net_dev);

	netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n",
		  raw_smp_processor_id());

	/* Stop the device and flush all the channels */
	efx_stop_all(efx);

	return 0;
}

static int efx_vlan_rx_add_vid(struct net_device *net_dev, __be16 proto, u16 vid)
{
	struct efx_nic *efx = netdev_priv(net_dev);

	if (efx->type->vlan_rx_add_vid)
		return efx->type->vlan_rx_add_vid(efx, proto, vid);
	else
		return -EOPNOTSUPP;
}

static int efx_vlan_rx_kill_vid(struct net_device *net_dev, __be16 proto, u16 vid)
{
	struct efx_nic *efx = netdev_priv(net_dev);

	if (efx->type->vlan_rx_kill_vid)
		return efx->type->vlan_rx_kill_vid(efx, proto, vid);
	else
		return -EOPNOTSUPP;
}

static const struct net_device_ops efx_netdev_ops = {
	.ndo_open		= efx_net_open,
	.ndo_stop		= efx_net_stop,
	.ndo_get_stats64	= efx_net_stats,
	.ndo_tx_timeout		= efx_watchdog,
	.ndo_start_xmit		= efx_hard_start_xmit,
	.ndo_validate_addr	= eth_validate_addr,
	.ndo_do_ioctl		= efx_ioctl,
	.ndo_change_mtu		= efx_change_mtu,
	.ndo_set_mac_address	= efx_set_mac_address,
	.ndo_set_rx_mode	= efx_set_rx_mode,
	.ndo_set_features	= efx_set_features,
	.ndo_vlan_rx_add_vid	= efx_vlan_rx_add_vid,
	.ndo_vlan_rx_kill_vid	= efx_vlan_rx_kill_vid,
#ifdef CONFIG_SFC_SRIOV
	.ndo_set_vf_mac		= efx_sriov_set_vf_mac,
	.ndo_set_vf_vlan	= efx_sriov_set_vf_vlan,
	.ndo_set_vf_spoofchk	= efx_sriov_set_vf_spoofchk,
	.ndo_get_vf_config	= efx_sriov_get_vf_config,
	.ndo_set_vf_link_state  = efx_sriov_set_vf_link_state,
#endif
	.ndo_get_phys_port_id   = efx_get_phys_port_id,
	.ndo_get_phys_port_name	= efx_get_phys_port_name,
	.ndo_setup_tc		= efx_setup_tc,
#ifdef CONFIG_RFS_ACCEL
	.ndo_rx_flow_steer	= efx_filter_rfs,
#endif
	.ndo_udp_tunnel_add	= udp_tunnel_nic_add_port,
	.ndo_udp_tunnel_del	= udp_tunnel_nic_del_port,
	.ndo_xdp_xmit		= efx_xdp_xmit,
	.ndo_bpf		= efx_xdp
};

static int efx_xdp_setup_prog(struct efx_nic *efx, struct bpf_prog *prog)
{
	struct bpf_prog *old_prog;

	if (efx->xdp_rxq_info_failed) {
		netif_err(efx, drv, efx->net_dev,
			  "Unable to bind XDP program due to previous failure of rxq_info\n");
		return -EINVAL;
	}

	if (prog && efx->net_dev->mtu > efx_xdp_max_mtu(efx)) {
		netif_err(efx, drv, efx->net_dev,
			  "Unable to configure XDP with MTU of %d (max: %d)\n",
			  efx->net_dev->mtu, efx_xdp_max_mtu(efx));
		return -EINVAL;
	}

	old_prog = rtnl_dereference(efx->xdp_prog);
	rcu_assign_pointer(efx->xdp_prog, prog);
	/* Release the reference that was originally passed by the caller. */
	if (old_prog)
		bpf_prog_put(old_prog);

	return 0;
}

/* Context: process, rtnl_lock() held. */
static int efx_xdp(struct net_device *dev, struct netdev_bpf *xdp)
{
	struct efx_nic *efx = netdev_priv(dev);

	switch (xdp->command) {
	case XDP_SETUP_PROG:
		return efx_xdp_setup_prog(efx, xdp->prog);
	default:
		return -EINVAL;
	}
}

static int efx_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **xdpfs,
			u32 flags)
{
	struct efx_nic *efx = netdev_priv(dev);

	if (!netif_running(dev))
		return -EINVAL;

	return efx_xdp_tx_buffers(efx, n, xdpfs, flags & XDP_XMIT_FLUSH);
}

static void efx_update_name(struct efx_nic *efx)
{
	strcpy(efx->name, efx->net_dev->name);
	efx_mtd_rename(efx);
	efx_set_channel_names(efx);
}

static int efx_netdev_event(struct notifier_block *this,
			    unsigned long event, void *ptr)
{
	struct net_device *net_dev = netdev_notifier_info_to_dev(ptr);

	if ((net_dev->netdev_ops == &efx_netdev_ops) &&
	    event == NETDEV_CHANGENAME)
		efx_update_name(netdev_priv(net_dev));

	return NOTIFY_DONE;
}

static struct notifier_block efx_netdev_notifier = {
	.notifier_call = efx_netdev_event,
};

static ssize_t
show_phy_type(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct efx_nic *efx = dev_get_drvdata(dev);
	return sprintf(buf, "%d\n", efx->phy_type);
}
static DEVICE_ATTR(phy_type, 0444, show_phy_type, NULL);

static int efx_register_netdev(struct efx_nic *efx)
{
	struct net_device *net_dev = efx->net_dev;
	struct efx_channel *channel;
	int rc;

	net_dev->watchdog_timeo = 5 * HZ;
	net_dev->irq = efx->pci_dev->irq;
	net_dev->netdev_ops = &efx_netdev_ops;
	if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0)
		net_dev->priv_flags |= IFF_UNICAST_FLT;
	net_dev->ethtool_ops = &efx_ethtool_ops;
	net_dev->gso_max_segs = EFX_TSO_MAX_SEGS;
	net_dev->min_mtu = EFX_MIN_MTU;
	net_dev->max_mtu = EFX_MAX_MTU;

	rtnl_lock();

	/* Enable resets to be scheduled and check whether any were
	 * already requested.  If so, the NIC is probably hosed so we
	 * abort.
	 */
	efx->state = STATE_READY;
	smp_mb(); /* ensure we change state before checking reset_pending */
	if (efx->reset_pending) {
		netif_err(efx, probe, efx->net_dev,
			  "aborting probe due to scheduled reset\n");
		rc = -EIO;
		goto fail_locked;
	}

	rc = dev_alloc_name(net_dev, net_dev->name);
	if (rc < 0)
		goto fail_locked;
	efx_update_name(efx);

	/* Always start with carrier off; PHY events will detect the link */
	netif_carrier_off(net_dev);

	rc = register_netdevice(net_dev);
	if (rc)
		goto fail_locked;

	efx_for_each_channel(channel, efx) {
		struct efx_tx_queue *tx_queue;
		efx_for_each_channel_tx_queue(tx_queue, channel)
			efx_init_tx_queue_core_txq(tx_queue);
	}

	efx_associate(efx);

	rtnl_unlock();

	rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type);
	if (rc) {
		netif_err(efx, drv, efx->net_dev,
			  "failed to init net dev attributes\n");
		goto fail_registered;
	}

	efx_init_mcdi_logging(efx);

	return 0;

fail_registered:
	rtnl_lock();
	efx_dissociate(efx);
	unregister_netdevice(net_dev);
fail_locked:
	efx->state = STATE_UNINIT;
	rtnl_unlock();
	netif_err(efx, drv, efx->net_dev, "could not register net dev\n");
	return rc;
}

static void efx_unregister_netdev(struct efx_nic *efx)
{
	if (!efx->net_dev)
		return;

	BUG_ON(netdev_priv(efx->net_dev) != efx);

	if (efx_dev_registered(efx)) {
		strlcpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name));
		efx_fini_mcdi_logging(efx);
		device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type);
		unregister_netdev(efx->net_dev);
	}
}

/**************************************************************************
 *
 * List of NICs we support
 *
 **************************************************************************/

/* PCI device ID table */
static const struct pci_device_id efx_pci_table[] = {
	{PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0803),	/* SFC9020 */
	 .driver_data = (unsigned long) &siena_a0_nic_type},
	{PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0813),	/* SFL9021 */
	 .driver_data = (unsigned long) &siena_a0_nic_type},
	{PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0903),  /* SFC9120 PF */
	 .driver_data = (unsigned long) &efx_hunt_a0_nic_type},
	{PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1903),  /* SFC9120 VF */
	 .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type},
	{PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0923),  /* SFC9140 PF */
	 .driver_data = (unsigned long) &efx_hunt_a0_nic_type},
	{PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1923),  /* SFC9140 VF */
	 .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type},
	{PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0a03),  /* SFC9220 PF */
	 .driver_data = (unsigned long) &efx_hunt_a0_nic_type},
	{PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1a03),  /* SFC9220 VF */
	 .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type},
	{PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0b03),  /* SFC9250 PF */
	 .driver_data = (unsigned long) &efx_hunt_a0_nic_type},
	{PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x1b03),  /* SFC9250 VF */
	 .driver_data = (unsigned long) &efx_hunt_a0_vf_nic_type},
	{0}			/* end of list */
};

/**************************************************************************
 *
 * Data housekeeping
 *
 **************************************************************************/

void efx_update_sw_stats(struct efx_nic *efx, u64 *stats)
{
	u64 n_rx_nodesc_trunc = 0;
	struct efx_channel *channel;

	efx_for_each_channel(channel, efx)
		n_rx_nodesc_trunc += channel->n_rx_nodesc_trunc;
	stats[GENERIC_STAT_rx_nodesc_trunc] = n_rx_nodesc_trunc;
	stats[GENERIC_STAT_rx_noskb_drops] = atomic_read(&efx->n_rx_noskb_drops);
}

/**************************************************************************
 *
 * PCI interface
 *
 **************************************************************************/

/* Main body of final NIC shutdown code
 * This is called only at module unload (or hotplug removal).
 */
static void efx_pci_remove_main(struct efx_nic *efx)
{
	/* Flush reset_work. It can no longer be scheduled since we
	 * are not READY.
	 */
	BUG_ON(efx->state == STATE_READY);
	efx_flush_reset_workqueue(efx);

	efx_disable_interrupts(efx);
	efx_clear_interrupt_affinity(efx);
	efx_nic_fini_interrupt(efx);
	efx_fini_port(efx);
	efx->type->fini(efx);
	efx_fini_napi(efx);
	efx_remove_all(efx);
}

/* Final NIC shutdown
 * This is called only at module unload (or hotplug removal).  A PF can call
 * this on its VFs to ensure they are unbound first.
 */
static void efx_pci_remove(struct pci_dev *pci_dev)
{
	struct efx_nic *efx;

	efx = pci_get_drvdata(pci_dev);
	if (!efx)
		return;

	/* Mark the NIC as fini, then stop the interface */
	rtnl_lock();
	efx_dissociate(efx);
	dev_close(efx->net_dev);
	efx_disable_interrupts(efx);
	efx->state = STATE_UNINIT;
	rtnl_unlock();

	if (efx->type->sriov_fini)
		efx->type->sriov_fini(efx);

	efx_unregister_netdev(efx);

	efx_mtd_remove(efx);

	efx_pci_remove_main(efx);

	efx_fini_io(efx);
	netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n");

	efx_fini_struct(efx);
	free_netdev(efx->net_dev);

	pci_disable_pcie_error_reporting(pci_dev);
};

/* NIC VPD information
 * Called during probe to display the part number of the
 * installed NIC.  VPD is potentially very large but this should
 * always appear within the first 512 bytes.
 */
#define SFC_VPD_LEN 512
static void efx_probe_vpd_strings(struct efx_nic *efx)
{
	struct pci_dev *dev = efx->pci_dev;
	char vpd_data[SFC_VPD_LEN];
	ssize_t vpd_size;
	int ro_start, ro_size, i, j;

	/* Get the vpd data from the device */
	vpd_size = pci_read_vpd(dev, 0, sizeof(vpd_data), vpd_data);
	if (vpd_size <= 0) {
		netif_err(efx, drv, efx->net_dev, "Unable to read VPD\n");
		return;
	}

	/* Get the Read only section */
	ro_start = pci_vpd_find_tag(vpd_data, 0, vpd_size, PCI_VPD_LRDT_RO_DATA);
	if (ro_start < 0) {
		netif_err(efx, drv, efx->net_dev, "VPD Read-only not found\n");
		return;
	}

	ro_size = pci_vpd_lrdt_size(&vpd_data[ro_start]);
	j = ro_size;
	i = ro_start + PCI_VPD_LRDT_TAG_SIZE;
	if (i + j > vpd_size)
		j = vpd_size - i;

	/* Get the Part number */
	i = pci_vpd_find_info_keyword(vpd_data, i, j, "PN");
	if (i < 0) {
		netif_err(efx, drv, efx->net_dev, "Part number not found\n");
		return;
	}

	j = pci_vpd_info_field_size(&vpd_data[i]);
	i += PCI_VPD_INFO_FLD_HDR_SIZE;
	if (i + j > vpd_size) {
		netif_err(efx, drv, efx->net_dev, "Incomplete part number\n");
		return;
	}

	netif_info(efx, drv, efx->net_dev,
		   "Part Number : %.*s\n", j, &vpd_data[i]);

	i = ro_start + PCI_VPD_LRDT_TAG_SIZE;
	j = ro_size;
	i = pci_vpd_find_info_keyword(vpd_data, i, j, "SN");
	if (i < 0) {
		netif_err(efx, drv, efx->net_dev, "Serial number not found\n");
		return;
	}

	j = pci_vpd_info_field_size(&vpd_data[i]);
	i += PCI_VPD_INFO_FLD_HDR_SIZE;
	if (i + j > vpd_size) {
		netif_err(efx, drv, efx->net_dev, "Incomplete serial number\n");
		return;
	}

	efx->vpd_sn = kmalloc(j + 1, GFP_KERNEL);
	if (!efx->vpd_sn)
		return;

	snprintf(efx->vpd_sn, j + 1, "%s", &vpd_data[i]);
}


/* Main body of NIC initialisation
 * This is called at module load (or hotplug insertion, theoretically).
 */
static int efx_pci_probe_main(struct efx_nic *efx)
{
	int rc;

	/* Do start-of-day initialisation */
	rc = efx_probe_all(efx);
	if (rc)
		goto fail1;

	efx_init_napi(efx);

	down_write(&efx->filter_sem);
	rc = efx->type->init(efx);
	up_write(&efx->filter_sem);
	if (rc) {
		netif_err(efx, probe, efx->net_dev,
			  "failed to initialise NIC\n");
		goto fail3;
	}

	rc = efx_init_port(efx);
	if (rc) {
		netif_err(efx, probe, efx->net_dev,
			  "failed to initialise port\n");
		goto fail4;
	}

	rc = efx_nic_init_interrupt(efx);
	if (rc)
		goto fail5;

	efx_set_interrupt_affinity(efx);
	rc = efx_enable_interrupts(efx);
	if (rc)
		goto fail6;

	return 0;

 fail6:
	efx_clear_interrupt_affinity(efx);
	efx_nic_fini_interrupt(efx);
 fail5:
	efx_fini_port(efx);
 fail4:
	efx->type->fini(efx);
 fail3:
	efx_fini_napi(efx);
	efx_remove_all(efx);
 fail1:
	return rc;
}

static int efx_pci_probe_post_io(struct efx_nic *efx)
{
	struct net_device *net_dev = efx->net_dev;
	int rc = efx_pci_probe_main(efx);

	if (rc)
		return rc;

	if (efx->type->sriov_init) {
		rc = efx->type->sriov_init(efx);
		if (rc)
			netif_err(efx, probe, efx->net_dev,
				  "SR-IOV can't be enabled rc %d\n", rc);
	}

	/* Determine netdevice features */
	net_dev->features |= (efx->type->offload_features | NETIF_F_SG |
			      NETIF_F_TSO | NETIF_F_RXCSUM | NETIF_F_RXALL);
	if (efx->type->offload_features & (NETIF_F_IPV6_CSUM | NETIF_F_HW_CSUM))
		net_dev->features |= NETIF_F_TSO6;
	/* Check whether device supports TSO */
	if (!efx->type->tso_versions || !efx->type->tso_versions(efx))
		net_dev->features &= ~NETIF_F_ALL_TSO;
	/* Mask for features that also apply to VLAN devices */
	net_dev->vlan_features |= (NETIF_F_HW_CSUM | NETIF_F_SG |
				   NETIF_F_HIGHDMA | NETIF_F_ALL_TSO |
				   NETIF_F_RXCSUM);

	net_dev->hw_features |= net_dev->features & ~efx->fixed_features;

	/* Disable receiving frames with bad FCS, by default. */
	net_dev->features &= ~NETIF_F_RXALL;

	/* Disable VLAN filtering by default.  It may be enforced if
	 * the feature is fixed (i.e. VLAN filters are required to
	 * receive VLAN tagged packets due to vPort restrictions).
	 */
	net_dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
	net_dev->features |= efx->fixed_features;

	rc = efx_register_netdev(efx);
	if (!rc)
		return 0;

	efx_pci_remove_main(efx);
	return rc;
}

/* NIC initialisation
 *
 * This is called at module load (or hotplug insertion,
 * theoretically).  It sets up PCI mappings, resets the NIC,
 * sets up and registers the network devices with the kernel and hooks
 * the interrupt service routine.  It does not prepare the device for
 * transmission; this is left to the first time one of the network
 * interfaces is brought up (i.e. efx_net_open).
 */
static int efx_pci_probe(struct pci_dev *pci_dev,
			 const struct pci_device_id *entry)
{
	struct net_device *net_dev;
	struct efx_nic *efx;
	int rc;

	/* Allocate and initialise a struct net_device and struct efx_nic */
	net_dev = alloc_etherdev_mqs(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES,
				     EFX_MAX_RX_QUEUES);
	if (!net_dev)
		return -ENOMEM;
	efx = netdev_priv(net_dev);
	efx->type = (const struct efx_nic_type *) entry->driver_data;
	efx->fixed_features |= NETIF_F_HIGHDMA;

	pci_set_drvdata(pci_dev, efx);
	SET_NETDEV_DEV(net_dev, &pci_dev->dev);
	rc = efx_init_struct(efx, pci_dev, net_dev);
	if (rc)
		goto fail1;

	netif_info(efx, probe, efx->net_dev,
		   "Solarflare NIC detected\n");

	if (!efx->type->is_vf)
		efx_probe_vpd_strings(efx);

	/* Set up basic I/O (BAR mappings etc) */
	rc = efx_init_io(efx, efx->type->mem_bar(efx), efx->type->max_dma_mask,
			 efx->type->mem_map_size(efx));
	if (rc)
		goto fail2;

	rc = efx_pci_probe_post_io(efx);
	if (rc) {
		/* On failure, retry once immediately.
		 * If we aborted probe due to a scheduled reset, dismiss it.
		 */
		efx->reset_pending = 0;
		rc = efx_pci_probe_post_io(efx);
		if (rc) {
			/* On another failure, retry once more
			 * after a 50-305ms delay.
			 */
			unsigned char r;

			get_random_bytes(&r, 1);
			msleep((unsigned int)r + 50);
			efx->reset_pending = 0;
			rc = efx_pci_probe_post_io(efx);
		}
	}
	if (rc)
		goto fail3;

	netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n");

	/* Try to create MTDs, but allow this to fail */
	rtnl_lock();
	rc = efx_mtd_probe(efx);
	rtnl_unlock();
	if (rc && rc != -EPERM)
		netif_warn(efx, probe, efx->net_dev,
			   "failed to create MTDs (%d)\n", rc);

	(void)pci_enable_pcie_error_reporting(pci_dev);

	if (efx->type->udp_tnl_push_ports)
		efx->type->udp_tnl_push_ports(efx);

	return 0;

 fail3:
	efx_fini_io(efx);
 fail2:
	efx_fini_struct(efx);
 fail1:
	WARN_ON(rc > 0);
	netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc);
	free_netdev(net_dev);
	return rc;
}

/* efx_pci_sriov_configure returns the actual number of Virtual Functions
 * enabled on success
 */
#ifdef CONFIG_SFC_SRIOV
static int efx_pci_sriov_configure(struct pci_dev *dev, int num_vfs)
{
	int rc;
	struct efx_nic *efx = pci_get_drvdata(dev);

	if (efx->type->sriov_configure) {
		rc = efx->type->sriov_configure(efx, num_vfs);
		if (rc)
			return rc;
		else
			return num_vfs;
	} else
		return -EOPNOTSUPP;
}
#endif

static int efx_pm_freeze(struct device *dev)
{
	struct efx_nic *efx = dev_get_drvdata(dev);

	rtnl_lock();

	if (efx->state != STATE_DISABLED) {
		efx->state = STATE_UNINIT;

		efx_device_detach_sync(efx);

		efx_stop_all(efx);
		efx_disable_interrupts(efx);
	}

	rtnl_unlock();

	return 0;
}

static int efx_pm_thaw(struct device *dev)
{
	int rc;
	struct efx_nic *efx = dev_get_drvdata(dev);

	rtnl_lock();

	if (efx->state != STATE_DISABLED) {
		rc = efx_enable_interrupts(efx);
		if (rc)
			goto fail;

		mutex_lock(&efx->mac_lock);
		efx->phy_op->reconfigure(efx);
		mutex_unlock(&efx->mac_lock);

		efx_start_all(efx);

		efx_device_attach_if_not_resetting(efx);

		efx->state = STATE_READY;

		efx->type->resume_wol(efx);
	}

	rtnl_unlock();

	/* Reschedule any quenched resets scheduled during efx_pm_freeze() */
	efx_queue_reset_work(efx);

	return 0;

fail:
	rtnl_unlock();

	return rc;
}

static int efx_pm_poweroff(struct device *dev)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);
	struct efx_nic *efx = pci_get_drvdata(pci_dev);

	efx->type->fini(efx);

	efx->reset_pending = 0;

	pci_save_state(pci_dev);
	return pci_set_power_state(pci_dev, PCI_D3hot);
}

/* Used for both resume and restore */
static int efx_pm_resume(struct device *dev)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);
	struct efx_nic *efx = pci_get_drvdata(pci_dev);
	int rc;

	rc = pci_set_power_state(pci_dev, PCI_D0);
	if (rc)
		return rc;
	pci_restore_state(pci_dev);
	rc = pci_enable_device(pci_dev);
	if (rc)
		return rc;
	pci_set_master(efx->pci_dev);
	rc = efx->type->reset(efx, RESET_TYPE_ALL);
	if (rc)
		return rc;
	down_write(&efx->filter_sem);
	rc = efx->type->init(efx);
	up_write(&efx->filter_sem);
	if (rc)
		return rc;
	rc = efx_pm_thaw(dev);
	return rc;
}

static int efx_pm_suspend(struct device *dev)
{
	int rc;

	efx_pm_freeze(dev);
	rc = efx_pm_poweroff(dev);
	if (rc)
		efx_pm_resume(dev);
	return rc;
}

static const struct dev_pm_ops efx_pm_ops = {
	.suspend	= efx_pm_suspend,
	.resume		= efx_pm_resume,
	.freeze		= efx_pm_freeze,
	.thaw		= efx_pm_thaw,
	.poweroff	= efx_pm_poweroff,
	.restore	= efx_pm_resume,
};

static struct pci_driver efx_pci_driver = {
	.name		= KBUILD_MODNAME,
	.id_table	= efx_pci_table,
	.probe		= efx_pci_probe,
	.remove		= efx_pci_remove,
	.driver.pm	= &efx_pm_ops,
	.err_handler	= &efx_err_handlers,
#ifdef CONFIG_SFC_SRIOV
	.sriov_configure = efx_pci_sriov_configure,
#endif
};

/**************************************************************************
 *
 * Kernel module interface
 *
 *************************************************************************/

static int __init efx_init_module(void)
{
	int rc;

	printk(KERN_INFO "Solarflare NET driver v" EFX_DRIVER_VERSION "\n");

	rc = register_netdevice_notifier(&efx_netdev_notifier);
	if (rc)
		goto err_notifier;

#ifdef CONFIG_SFC_SRIOV
	rc = efx_init_sriov();
	if (rc)
		goto err_sriov;
#endif

	rc = efx_create_reset_workqueue();
	if (rc)
		goto err_reset;

	rc = pci_register_driver(&efx_pci_driver);
	if (rc < 0)
		goto err_pci;

	rc = pci_register_driver(&ef100_pci_driver);
	if (rc < 0)
		goto err_pci_ef100;

	return 0;

 err_pci_ef100:
	pci_unregister_driver(&efx_pci_driver);
 err_pci:
	efx_destroy_reset_workqueue();
 err_reset:
#ifdef CONFIG_SFC_SRIOV
	efx_fini_sriov();
 err_sriov:
#endif
	unregister_netdevice_notifier(&efx_netdev_notifier);
 err_notifier:
	return rc;
}

static void __exit efx_exit_module(void)
{
	printk(KERN_INFO "Solarflare NET driver unloading\n");

	pci_unregister_driver(&ef100_pci_driver);
	pci_unregister_driver(&efx_pci_driver);
	efx_destroy_reset_workqueue();
#ifdef CONFIG_SFC_SRIOV
	efx_fini_sriov();
#endif
	unregister_netdevice_notifier(&efx_netdev_notifier);

}

module_init(efx_init_module);
module_exit(efx_exit_module);

MODULE_AUTHOR("Solarflare Communications and "
	      "Michael Brown <mbrown@fensystems.co.uk>");
MODULE_DESCRIPTION("Solarflare network driver");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, efx_pci_table);
MODULE_VERSION(EFX_DRIVER_VERSION);