summaryrefslogtreecommitdiffstats
path: root/drivers/net/sfc/sfc.c
blob: 6690053f22737437dbc17880ed6e87a2c9dfcb97 (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
/* SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 2016-2018 Solarflare Communications Inc.
 * All rights reserved.
 *
 * This software was jointly developed between OKTET Labs (under contract
 * for Solarflare) and Solarflare Communications, Inc.
 */

/* sysconf() */
#include <unistd.h>

#include <rte_errno.h>
#include <rte_alarm.h>

#include "efx.h"

#include "sfc.h"
#include "sfc_log.h"
#include "sfc_ev.h"
#include "sfc_rx.h"
#include "sfc_tx.h"
#include "sfc_kvargs.h"
#include "sfc_tweak.h"


int
sfc_dma_alloc(const struct sfc_adapter *sa, const char *name, uint16_t id,
	      size_t len, int socket_id, efsys_mem_t *esmp)
{
	const struct rte_memzone *mz;

	sfc_log_init(sa, "name=%s id=%u len=%lu socket_id=%d",
		     name, id, len, socket_id);

	mz = rte_eth_dma_zone_reserve(sa->eth_dev, name, id, len,
				      sysconf(_SC_PAGESIZE), socket_id);
	if (mz == NULL) {
		sfc_err(sa, "cannot reserve DMA zone for %s:%u %#x@%d: %s",
			name, (unsigned int)id, (unsigned int)len, socket_id,
			rte_strerror(rte_errno));
		return ENOMEM;
	}

	esmp->esm_addr = mz->iova;
	if (esmp->esm_addr == RTE_BAD_IOVA) {
		(void)rte_memzone_free(mz);
		return EFAULT;
	}

	esmp->esm_mz = mz;
	esmp->esm_base = mz->addr;

	return 0;
}

void
sfc_dma_free(const struct sfc_adapter *sa, efsys_mem_t *esmp)
{
	int rc;

	sfc_log_init(sa, "name=%s", esmp->esm_mz->name);

	rc = rte_memzone_free(esmp->esm_mz);
	if (rc != 0)
		sfc_err(sa, "rte_memzone_free(() failed: %d", rc);

	memset(esmp, 0, sizeof(*esmp));
}

static uint32_t
sfc_phy_cap_from_link_speeds(uint32_t speeds)
{
	uint32_t phy_caps = 0;

	if (~speeds & ETH_LINK_SPEED_FIXED) {
		phy_caps |= (1 << EFX_PHY_CAP_AN);
		/*
		 * If no speeds are specified in the mask, any supported
		 * may be negotiated
		 */
		if (speeds == ETH_LINK_SPEED_AUTONEG)
			phy_caps |=
				(1 << EFX_PHY_CAP_1000FDX) |
				(1 << EFX_PHY_CAP_10000FDX) |
				(1 << EFX_PHY_CAP_25000FDX) |
				(1 << EFX_PHY_CAP_40000FDX) |
				(1 << EFX_PHY_CAP_50000FDX) |
				(1 << EFX_PHY_CAP_100000FDX);
	}
	if (speeds & ETH_LINK_SPEED_1G)
		phy_caps |= (1 << EFX_PHY_CAP_1000FDX);
	if (speeds & ETH_LINK_SPEED_10G)
		phy_caps |= (1 << EFX_PHY_CAP_10000FDX);
	if (speeds & ETH_LINK_SPEED_25G)
		phy_caps |= (1 << EFX_PHY_CAP_25000FDX);
	if (speeds & ETH_LINK_SPEED_40G)
		phy_caps |= (1 << EFX_PHY_CAP_40000FDX);
	if (speeds & ETH_LINK_SPEED_50G)
		phy_caps |= (1 << EFX_PHY_CAP_50000FDX);
	if (speeds & ETH_LINK_SPEED_100G)
		phy_caps |= (1 << EFX_PHY_CAP_100000FDX);

	return phy_caps;
}

/*
 * Check requested device level configuration.
 * Receive and transmit configuration is checked in corresponding
 * modules.
 */
static int
sfc_check_conf(struct sfc_adapter *sa)
{
	const struct rte_eth_conf *conf = &sa->eth_dev->data->dev_conf;
	int rc = 0;

	sa->port.phy_adv_cap =
		sfc_phy_cap_from_link_speeds(conf->link_speeds) &
		sa->port.phy_adv_cap_mask;
	if ((sa->port.phy_adv_cap & ~(1 << EFX_PHY_CAP_AN)) == 0) {
		sfc_err(sa, "No link speeds from mask %#x are supported",
			conf->link_speeds);
		rc = EINVAL;
	}

#if !EFSYS_OPT_LOOPBACK
	if (conf->lpbk_mode != 0) {
		sfc_err(sa, "Loopback not supported");
		rc = EINVAL;
	}
#endif

	if (conf->dcb_capability_en != 0) {
		sfc_err(sa, "Priority-based flow control not supported");
		rc = EINVAL;
	}

	if (conf->fdir_conf.mode != RTE_FDIR_MODE_NONE) {
		sfc_err(sa, "Flow Director not supported");
		rc = EINVAL;
	}

	if ((conf->intr_conf.lsc != 0) &&
	    (sa->intr.type != EFX_INTR_LINE) &&
	    (sa->intr.type != EFX_INTR_MESSAGE)) {
		sfc_err(sa, "Link status change interrupt not supported");
		rc = EINVAL;
	}

	if (conf->intr_conf.rxq != 0) {
		sfc_err(sa, "Receive queue interrupt not supported");
		rc = EINVAL;
	}

	return rc;
}

/*
 * Find out maximum number of receive and transmit queues which could be
 * advertised.
 *
 * NIC is kept initialized on success to allow other modules acquire
 * defaults and capabilities.
 */
static int
sfc_estimate_resource_limits(struct sfc_adapter *sa)
{
	const efx_nic_cfg_t *encp = efx_nic_cfg_get(sa->nic);
	efx_drv_limits_t limits;
	int rc;
	uint32_t evq_allocated;
	uint32_t rxq_allocated;
	uint32_t txq_allocated;

	memset(&limits, 0, sizeof(limits));

	/* Request at least one Rx and Tx queue */
	limits.edl_min_rxq_count = 1;
	limits.edl_min_txq_count = 1;
	/* Management event queue plus event queue for each Tx and Rx queue */
	limits.edl_min_evq_count =
		1 + limits.edl_min_rxq_count + limits.edl_min_txq_count;

	/* Divide by number of functions to guarantee that all functions
	 * will get promised resources
	 */
	/* FIXME Divide by number of functions (not 2) below */
	limits.edl_max_evq_count = encp->enc_evq_limit / 2;
	SFC_ASSERT(limits.edl_max_evq_count >= limits.edl_min_rxq_count);

	/* Split equally between receive and transmit */
	limits.edl_max_rxq_count =
		MIN(encp->enc_rxq_limit, (limits.edl_max_evq_count - 1) / 2);
	SFC_ASSERT(limits.edl_max_rxq_count >= limits.edl_min_rxq_count);

	limits.edl_max_txq_count =
		MIN(encp->enc_txq_limit,
		    limits.edl_max_evq_count - 1 - limits.edl_max_rxq_count);

	if (sa->tso)
		limits.edl_max_txq_count =
			MIN(limits.edl_max_txq_count,
			    encp->enc_fw_assisted_tso_v2_n_contexts /
			    encp->enc_hw_pf_count);

	SFC_ASSERT(limits.edl_max_txq_count >= limits.edl_min_rxq_count);

	/* Configure the minimum required resources needed for the
	 * driver to operate, and the maximum desired resources that the
	 * driver is capable of using.
	 */
	efx_nic_set_drv_limits(sa->nic, &limits);

	sfc_log_init(sa, "init nic");
	rc = efx_nic_init(sa->nic);
	if (rc != 0)
		goto fail_nic_init;

	/* Find resource dimensions assigned by firmware to this function */
	rc = efx_nic_get_vi_pool(sa->nic, &evq_allocated, &rxq_allocated,
				 &txq_allocated);
	if (rc != 0)
		goto fail_get_vi_pool;

	/* It still may allocate more than maximum, ensure limit */
	evq_allocated = MIN(evq_allocated, limits.edl_max_evq_count);
	rxq_allocated = MIN(rxq_allocated, limits.edl_max_rxq_count);
	txq_allocated = MIN(txq_allocated, limits.edl_max_txq_count);

	/* Subtract management EVQ not used for traffic */
	SFC_ASSERT(evq_allocated > 0);
	evq_allocated--;

	/* Right now we use separate EVQ for Rx and Tx */
	sa->rxq_max = MIN(rxq_allocated, evq_allocated / 2);
	sa->txq_max = MIN(txq_allocated, evq_allocated - sa->rxq_max);

	/* Keep NIC initialized */
	return 0;

fail_get_vi_pool:
fail_nic_init:
	efx_nic_fini(sa->nic);
	return rc;
}

static int
sfc_set_drv_limits(struct sfc_adapter *sa)
{
	const struct rte_eth_dev_data *data = sa->eth_dev->data;
	efx_drv_limits_t lim;

	memset(&lim, 0, sizeof(lim));

	/* Limits are strict since take into account initial estimation */
	lim.edl_min_evq_count = lim.edl_max_evq_count =
		1 + data->nb_rx_queues + data->nb_tx_queues;
	lim.edl_min_rxq_count = lim.edl_max_rxq_count = data->nb_rx_queues;
	lim.edl_min_txq_count = lim.edl_max_txq_count = data->nb_tx_queues;

	return efx_nic_set_drv_limits(sa->nic, &lim);
}

static int
sfc_set_fw_subvariant(struct sfc_adapter *sa)
{
	const efx_nic_cfg_t *encp = efx_nic_cfg_get(sa->nic);
	uint64_t tx_offloads = sa->eth_dev->data->dev_conf.txmode.offloads;
	unsigned int txq_index;
	efx_nic_fw_subvariant_t req_fw_subvariant;
	efx_nic_fw_subvariant_t cur_fw_subvariant;
	int rc;

	if (!encp->enc_fw_subvariant_no_tx_csum_supported) {
		sfc_info(sa, "no-Tx-checksum subvariant not supported");
		return 0;
	}

	for (txq_index = 0; txq_index < sa->txq_count; ++txq_index) {
		struct sfc_txq_info *txq_info = &sa->txq_info[txq_index];

		if (txq_info->txq != NULL)
			tx_offloads |= txq_info->txq->offloads;
	}

	if (tx_offloads & (DEV_TX_OFFLOAD_IPV4_CKSUM |
			   DEV_TX_OFFLOAD_TCP_CKSUM |
			   DEV_TX_OFFLOAD_UDP_CKSUM |
			   DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM))
		req_fw_subvariant = EFX_NIC_FW_SUBVARIANT_DEFAULT;
	else
		req_fw_subvariant = EFX_NIC_FW_SUBVARIANT_NO_TX_CSUM;

	rc = efx_nic_get_fw_subvariant(sa->nic, &cur_fw_subvariant);
	if (rc != 0) {
		sfc_err(sa, "failed to get FW subvariant: %d", rc);
		return rc;
	}
	sfc_info(sa, "FW subvariant is %u vs required %u",
		 cur_fw_subvariant, req_fw_subvariant);

	if (cur_fw_subvariant == req_fw_subvariant)
		return 0;

	rc = efx_nic_set_fw_subvariant(sa->nic, req_fw_subvariant);
	if (rc != 0) {
		sfc_err(sa, "failed to set FW subvariant %u: %d",
			req_fw_subvariant, rc);
		return rc;
	}
	sfc_info(sa, "FW subvariant set to %u", req_fw_subvariant);

	return 0;
}

static int
sfc_try_start(struct sfc_adapter *sa)
{
	const efx_nic_cfg_t *encp;
	int rc;

	sfc_log_init(sa, "entry");

	SFC_ASSERT(sfc_adapter_is_locked(sa));
	SFC_ASSERT(sa->state == SFC_ADAPTER_STARTING);

	sfc_log_init(sa, "set FW subvariant");
	rc = sfc_set_fw_subvariant(sa);
	if (rc != 0)
		goto fail_set_fw_subvariant;

	sfc_log_init(sa, "set resource limits");
	rc = sfc_set_drv_limits(sa);
	if (rc != 0)
		goto fail_set_drv_limits;

	sfc_log_init(sa, "init nic");
	rc = efx_nic_init(sa->nic);
	if (rc != 0)
		goto fail_nic_init;

	encp = efx_nic_cfg_get(sa->nic);
	if (encp->enc_tunnel_encapsulations_supported != 0) {
		sfc_log_init(sa, "apply tunnel config");
		rc = efx_tunnel_reconfigure(sa->nic);
		if (rc != 0)
			goto fail_tunnel_reconfigure;
	}

	rc = sfc_intr_start(sa);
	if (rc != 0)
		goto fail_intr_start;

	rc = sfc_ev_start(sa);
	if (rc != 0)
		goto fail_ev_start;

	rc = sfc_port_start(sa);
	if (rc != 0)
		goto fail_port_start;

	rc = sfc_rx_start(sa);
	if (rc != 0)
		goto fail_rx_start;

	rc = sfc_tx_start(sa);
	if (rc != 0)
		goto fail_tx_start;

	rc = sfc_flow_start(sa);
	if (rc != 0)
		goto fail_flows_insert;

	sfc_log_init(sa, "done");
	return 0;

fail_flows_insert:
	sfc_tx_stop(sa);

fail_tx_start:
	sfc_rx_stop(sa);

fail_rx_start:
	sfc_port_stop(sa);

fail_port_start:
	sfc_ev_stop(sa);

fail_ev_start:
	sfc_intr_stop(sa);

fail_intr_start:
fail_tunnel_reconfigure:
	efx_nic_fini(sa->nic);

fail_nic_init:
fail_set_drv_limits:
fail_set_fw_subvariant:
	sfc_log_init(sa, "failed %d", rc);
	return rc;
}

int
sfc_start(struct sfc_adapter *sa)
{
	unsigned int start_tries = 3;
	int rc;

	sfc_log_init(sa, "entry");

	SFC_ASSERT(sfc_adapter_is_locked(sa));

	switch (sa->state) {
	case SFC_ADAPTER_CONFIGURED:
		break;
	case SFC_ADAPTER_STARTED:
		sfc_notice(sa, "already started");
		return 0;
	default:
		rc = EINVAL;
		goto fail_bad_state;
	}

	sa->state = SFC_ADAPTER_STARTING;

	do {
		rc = sfc_try_start(sa);
	} while ((--start_tries > 0) &&
		 (rc == EIO || rc == EAGAIN || rc == ENOENT || rc == EINVAL));

	if (rc != 0)
		goto fail_try_start;

	sa->state = SFC_ADAPTER_STARTED;
	sfc_log_init(sa, "done");
	return 0;

fail_try_start:
	sa->state = SFC_ADAPTER_CONFIGURED;
fail_bad_state:
	sfc_log_init(sa, "failed %d", rc);
	return rc;
}

void
sfc_stop(struct sfc_adapter *sa)
{
	sfc_log_init(sa, "entry");

	SFC_ASSERT(sfc_adapter_is_locked(sa));

	switch (sa->state) {
	case SFC_ADAPTER_STARTED:
		break;
	case SFC_ADAPTER_CONFIGURED:
		sfc_notice(sa, "already stopped");
		return;
	default:
		sfc_err(sa, "stop in unexpected state %u", sa->state);
		SFC_ASSERT(B_FALSE);
		return;
	}

	sa->state = SFC_ADAPTER_STOPPING;

	sfc_flow_stop(sa);
	sfc_tx_stop(sa);
	sfc_rx_stop(sa);
	sfc_port_stop(sa);
	sfc_ev_stop(sa);
	sfc_intr_stop(sa);
	efx_nic_fini(sa->nic);

	sa->state = SFC_ADAPTER_CONFIGURED;
	sfc_log_init(sa, "done");
}

static int
sfc_restart(struct sfc_adapter *sa)
{
	int rc;

	SFC_ASSERT(sfc_adapter_is_locked(sa));

	if (sa->state != SFC_ADAPTER_STARTED)
		return EINVAL;

	sfc_stop(sa);

	rc = sfc_start(sa);
	if (rc != 0)
		sfc_err(sa, "restart failed");

	return rc;
}

static void
sfc_restart_if_required(void *arg)
{
	struct sfc_adapter *sa = arg;

	/* If restart is scheduled, clear the flag and do it */
	if (rte_atomic32_cmpset((volatile uint32_t *)&sa->restart_required,
				1, 0)) {
		sfc_adapter_lock(sa);
		if (sa->state == SFC_ADAPTER_STARTED)
			(void)sfc_restart(sa);
		sfc_adapter_unlock(sa);
	}
}

void
sfc_schedule_restart(struct sfc_adapter *sa)
{
	int rc;

	/* Schedule restart alarm if it is not scheduled yet */
	if (!rte_atomic32_test_and_set(&sa->restart_required))
		return;

	rc = rte_eal_alarm_set(1, sfc_restart_if_required, sa);
	if (rc == -ENOTSUP)
		sfc_warn(sa, "alarms are not supported, restart is pending");
	else if (rc != 0)
		sfc_err(sa, "cannot arm restart alarm (rc=%d)", rc);
	else
		sfc_notice(sa, "restart scheduled");
}

int
sfc_configure(struct sfc_adapter *sa)
{
	int rc;

	sfc_log_init(sa, "entry");

	SFC_ASSERT(sfc_adapter_is_locked(sa));

	SFC_ASSERT(sa->state == SFC_ADAPTER_INITIALIZED ||
		   sa->state == SFC_ADAPTER_CONFIGURED);
	sa->state = SFC_ADAPTER_CONFIGURING;

	rc = sfc_check_conf(sa);
	if (rc != 0)
		goto fail_check_conf;

	rc = sfc_intr_configure(sa);
	if (rc != 0)
		goto fail_intr_configure;

	rc = sfc_port_configure(sa);
	if (rc != 0)
		goto fail_port_configure;

	rc = sfc_rx_configure(sa);
	if (rc != 0)
		goto fail_rx_configure;

	rc = sfc_tx_configure(sa);
	if (rc != 0)
		goto fail_tx_configure;

	sa->state = SFC_ADAPTER_CONFIGURED;
	sfc_log_init(sa, "done");
	return 0;

fail_tx_configure:
	sfc_rx_close(sa);

fail_rx_configure:
	sfc_port_close(sa);

fail_port_configure:
	sfc_intr_close(sa);

fail_intr_configure:
fail_check_conf:
	sa->state = SFC_ADAPTER_INITIALIZED;
	sfc_log_init(sa, "failed %d", rc);
	return rc;
}

void
sfc_close(struct sfc_adapter *sa)
{
	sfc_log_init(sa, "entry");

	SFC_ASSERT(sfc_adapter_is_locked(sa));

	SFC_ASSERT(sa->state == SFC_ADAPTER_CONFIGURED);
	sa->state = SFC_ADAPTER_CLOSING;

	sfc_tx_close(sa);
	sfc_rx_close(sa);
	sfc_port_close(sa);
	sfc_intr_close(sa);

	sa->state = SFC_ADAPTER_INITIALIZED;
	sfc_log_init(sa, "done");
}

static int
sfc_mem_bar_init(struct sfc_adapter *sa, unsigned int membar)
{
	struct rte_eth_dev *eth_dev = sa->eth_dev;
	struct rte_pci_device *pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
	efsys_bar_t *ebp = &sa->mem_bar;
	struct rte_mem_resource *res = &pci_dev->mem_resource[membar];

	SFC_BAR_LOCK_INIT(ebp, eth_dev->data->name);
	ebp->esb_rid = membar;
	ebp->esb_dev = pci_dev;
	ebp->esb_base = res->addr;
	return 0;
}

static void
sfc_mem_bar_fini(struct sfc_adapter *sa)
{
	efsys_bar_t *ebp = &sa->mem_bar;

	SFC_BAR_LOCK_DESTROY(ebp);
	memset(ebp, 0, sizeof(*ebp));
}

/*
 * A fixed RSS key which has a property of being symmetric
 * (symmetrical flows are distributed to the same CPU)
 * and also known to give a uniform distribution
 * (a good distribution of traffic between different CPUs)
 */
static const uint8_t default_rss_key[EFX_RSS_KEY_SIZE] = {
	0x6d, 0x5a, 0x6d, 0x5a, 0x6d, 0x5a, 0x6d, 0x5a,
	0x6d, 0x5a, 0x6d, 0x5a, 0x6d, 0x5a, 0x6d, 0x5a,
	0x6d, 0x5a, 0x6d, 0x5a, 0x6d, 0x5a, 0x6d, 0x5a,
	0x6d, 0x5a, 0x6d, 0x5a, 0x6d, 0x5a, 0x6d, 0x5a,
	0x6d, 0x5a, 0x6d, 0x5a, 0x6d, 0x5a, 0x6d, 0x5a,
};

static int
sfc_rss_attach(struct sfc_adapter *sa)
{
	struct sfc_rss *rss = &sa->rss;
	int rc;

	rc = efx_intr_init(sa->nic, sa->intr.type, NULL);
	if (rc != 0)
		goto fail_intr_init;

	rc = efx_ev_init(sa->nic);
	if (rc != 0)
		goto fail_ev_init;

	rc = efx_rx_init(sa->nic);
	if (rc != 0)
		goto fail_rx_init;

	rc = efx_rx_scale_default_support_get(sa->nic, &rss->context_type);
	if (rc != 0)
		goto fail_scale_support_get;

	rc = efx_rx_hash_default_support_get(sa->nic, &rss->hash_support);
	if (rc != 0)
		goto fail_hash_support_get;

	rc = sfc_rx_hash_init(sa);
	if (rc != 0)
		goto fail_rx_hash_init;

	efx_rx_fini(sa->nic);
	efx_ev_fini(sa->nic);
	efx_intr_fini(sa->nic);

	rte_memcpy(rss->key, default_rss_key, sizeof(rss->key));

	return 0;

fail_rx_hash_init:
fail_hash_support_get:
fail_scale_support_get:
	efx_rx_fini(sa->nic);

fail_rx_init:
	efx_ev_fini(sa->nic);

fail_ev_init:
	efx_intr_fini(sa->nic);

fail_intr_init:
	return rc;
}

static void
sfc_rss_detach(struct sfc_adapter *sa)
{
	sfc_rx_hash_fini(sa);
}

int
sfc_attach(struct sfc_adapter *sa)
{
	const efx_nic_cfg_t *encp;
	efx_nic_t *enp = sa->nic;
	int rc;

	sfc_log_init(sa, "entry");

	SFC_ASSERT(sfc_adapter_is_locked(sa));

	efx_mcdi_new_epoch(enp);

	sfc_log_init(sa, "reset nic");
	rc = efx_nic_reset(enp);
	if (rc != 0)
		goto fail_nic_reset;

	/*
	 * Probed NIC is sufficient for tunnel init.
	 * Initialize tunnel support to be able to use libefx
	 * efx_tunnel_config_udp_{add,remove}() in any state and
	 * efx_tunnel_reconfigure() on start up.
	 */
	rc = efx_tunnel_init(enp);
	if (rc != 0)
		goto fail_tunnel_init;

	encp = efx_nic_cfg_get(sa->nic);

	if (sa->dp_tx->features & SFC_DP_TX_FEAT_TSO) {
		sa->tso = encp->enc_fw_assisted_tso_v2_enabled;
		if (!sa->tso)
			sfc_warn(sa,
				 "TSO support isn't available on this adapter");
	}

	sfc_log_init(sa, "estimate resource limits");
	rc = sfc_estimate_resource_limits(sa);
	if (rc != 0)
		goto fail_estimate_rsrc_limits;

	sa->txq_max_entries = encp->enc_txq_max_ndescs;
	SFC_ASSERT(rte_is_power_of_2(sa->txq_max_entries));

	rc = sfc_intr_attach(sa);
	if (rc != 0)
		goto fail_intr_attach;

	rc = sfc_ev_attach(sa);
	if (rc != 0)
		goto fail_ev_attach;

	rc = sfc_port_attach(sa);
	if (rc != 0)
		goto fail_port_attach;

	rc = sfc_rss_attach(sa);
	if (rc != 0)
		goto fail_rss_attach;

	rc = sfc_filter_attach(sa);
	if (rc != 0)
		goto fail_filter_attach;

	sfc_log_init(sa, "fini nic");
	efx_nic_fini(enp);

	sfc_flow_init(sa);

	sa->state = SFC_ADAPTER_INITIALIZED;

	sfc_log_init(sa, "done");
	return 0;

fail_filter_attach:
	sfc_rss_detach(sa);

fail_rss_attach:
	sfc_port_detach(sa);

fail_port_attach:
	sfc_ev_detach(sa);

fail_ev_attach:
	sfc_intr_detach(sa);

fail_intr_attach:
	efx_nic_fini(sa->nic);

fail_estimate_rsrc_limits:
fail_tunnel_init:
	efx_tunnel_fini(sa->nic);

fail_nic_reset:

	sfc_log_init(sa, "failed %d", rc);
	return rc;
}

void
sfc_detach(struct sfc_adapter *sa)
{
	sfc_log_init(sa, "entry");

	SFC_ASSERT(sfc_adapter_is_locked(sa));

	sfc_flow_fini(sa);

	sfc_filter_detach(sa);
	sfc_rss_detach(sa);
	sfc_port_detach(sa);
	sfc_ev_detach(sa);
	sfc_intr_detach(sa);
	efx_tunnel_fini(sa->nic);

	sa->state = SFC_ADAPTER_UNINITIALIZED;
}

static int
sfc_kvarg_fv_variant_handler(__rte_unused const char *key,
			     const char *value_str, void *opaque)
{
	uint32_t *value = opaque;

	if (strcasecmp(value_str, SFC_KVARG_FW_VARIANT_DONT_CARE) == 0)
		*value = EFX_FW_VARIANT_DONT_CARE;
	else if (strcasecmp(value_str, SFC_KVARG_FW_VARIANT_FULL_FEATURED) == 0)
		*value = EFX_FW_VARIANT_FULL_FEATURED;
	else if (strcasecmp(value_str, SFC_KVARG_FW_VARIANT_LOW_LATENCY) == 0)
		*value = EFX_FW_VARIANT_LOW_LATENCY;
	else if (strcasecmp(value_str, SFC_KVARG_FW_VARIANT_PACKED_STREAM) == 0)
		*value = EFX_FW_VARIANT_PACKED_STREAM;
	else if (strcasecmp(value_str, SFC_KVARG_FW_VARIANT_DPDK) == 0)
		*value = EFX_FW_VARIANT_DPDK;
	else
		return -EINVAL;

	return 0;
}

static int
sfc_get_fw_variant(struct sfc_adapter *sa, efx_fw_variant_t *efv)
{
	efx_nic_fw_info_t enfi;
	int rc;

	rc = efx_nic_get_fw_version(sa->nic, &enfi);
	if (rc != 0)
		return rc;
	else if (!enfi.enfi_dpcpu_fw_ids_valid)
		return ENOTSUP;

	/*
	 * Firmware variant can be uniquely identified by the RxDPCPU
	 * firmware id
	 */
	switch (enfi.enfi_rx_dpcpu_fw_id) {
	case EFX_RXDP_FULL_FEATURED_FW_ID:
		*efv = EFX_FW_VARIANT_FULL_FEATURED;
		break;

	case EFX_RXDP_LOW_LATENCY_FW_ID:
		*efv = EFX_FW_VARIANT_LOW_LATENCY;
		break;

	case EFX_RXDP_PACKED_STREAM_FW_ID:
		*efv = EFX_FW_VARIANT_PACKED_STREAM;
		break;

	case EFX_RXDP_DPDK_FW_ID:
		*efv = EFX_FW_VARIANT_DPDK;
		break;

	default:
		/*
		 * Other firmware variants are not considered, since they are
		 * not supported in the device parameters
		 */
		*efv = EFX_FW_VARIANT_DONT_CARE;
		break;
	}

	return 0;
}

static const char *
sfc_fw_variant2str(efx_fw_variant_t efv)
{
	switch (efv) {
	case EFX_RXDP_FULL_FEATURED_FW_ID:
		return SFC_KVARG_FW_VARIANT_FULL_FEATURED;
	case EFX_RXDP_LOW_LATENCY_FW_ID:
		return SFC_KVARG_FW_VARIANT_LOW_LATENCY;
	case EFX_RXDP_PACKED_STREAM_FW_ID:
		return SFC_KVARG_FW_VARIANT_PACKED_STREAM;
	case EFX_RXDP_DPDK_FW_ID:
		return SFC_KVARG_FW_VARIANT_DPDK;
	default:
		return "unknown";
	}
}

static int
sfc_kvarg_rxd_wait_timeout_ns(struct sfc_adapter *sa)
{
	int rc;
	long value;

	value = SFC_RXD_WAIT_TIMEOUT_NS_DEF;

	rc = sfc_kvargs_process(sa, SFC_KVARG_RXD_WAIT_TIMEOUT_NS,
				sfc_kvarg_long_handler, &value);
	if (rc != 0)
		return rc;

	if (value < 0 ||
	    (unsigned long)value > EFX_RXQ_ES_SUPER_BUFFER_HOL_BLOCK_MAX) {
		sfc_err(sa, "wrong '" SFC_KVARG_RXD_WAIT_TIMEOUT_NS "' "
			    "was set (%ld);", value);
		sfc_err(sa, "it must not be less than 0 or greater than %u",
			    EFX_RXQ_ES_SUPER_BUFFER_HOL_BLOCK_MAX);
		return EINVAL;
	}

	sa->rxd_wait_timeout_ns = value;
	return 0;
}

static int
sfc_nic_probe(struct sfc_adapter *sa)
{
	efx_nic_t *enp = sa->nic;
	efx_fw_variant_t preferred_efv;
	efx_fw_variant_t efv;
	int rc;

	preferred_efv = EFX_FW_VARIANT_DONT_CARE;
	rc = sfc_kvargs_process(sa, SFC_KVARG_FW_VARIANT,
				sfc_kvarg_fv_variant_handler,
				&preferred_efv);
	if (rc != 0) {
		sfc_err(sa, "invalid %s parameter value", SFC_KVARG_FW_VARIANT);
		return rc;
	}

	rc = sfc_kvarg_rxd_wait_timeout_ns(sa);
	if (rc != 0)
		return rc;

	rc = efx_nic_probe(enp, preferred_efv);
	if (rc == EACCES) {
		/* Unprivileged functions cannot set FW variant */
		rc = efx_nic_probe(enp, EFX_FW_VARIANT_DONT_CARE);
	}
	if (rc != 0)
		return rc;

	rc = sfc_get_fw_variant(sa, &efv);
	if (rc == ENOTSUP) {
		sfc_warn(sa, "FW variant can not be obtained");
		return 0;
	}
	if (rc != 0)
		return rc;

	/* Check that firmware variant was changed to the requested one */
	if (preferred_efv != EFX_FW_VARIANT_DONT_CARE && preferred_efv != efv) {
		sfc_warn(sa, "FW variant has not changed to the requested %s",
			 sfc_fw_variant2str(preferred_efv));
	}

	sfc_notice(sa, "running FW variant is %s", sfc_fw_variant2str(efv));

	return 0;
}

int
sfc_probe(struct sfc_adapter *sa)
{
	struct rte_pci_device *pci_dev = RTE_ETH_DEV_TO_PCI(sa->eth_dev);
	unsigned int membar;
	efx_nic_t *enp;
	int rc;

	sfc_log_init(sa, "entry");

	SFC_ASSERT(sfc_adapter_is_locked(sa));

	sa->socket_id = rte_socket_id();
	rte_atomic32_init(&sa->restart_required);

	sfc_log_init(sa, "get family");
	rc = efx_family(pci_dev->id.vendor_id, pci_dev->id.device_id,
			&sa->family, &membar);
	if (rc != 0)
		goto fail_family;
	sfc_log_init(sa, "family is %u, membar is %u", sa->family, membar);

	sfc_log_init(sa, "init mem bar");
	rc = sfc_mem_bar_init(sa, membar);
	if (rc != 0)
		goto fail_mem_bar_init;

	sfc_log_init(sa, "create nic");
	rte_spinlock_init(&sa->nic_lock);
	rc = efx_nic_create(sa->family, (efsys_identifier_t *)sa,
			    &sa->mem_bar, &sa->nic_lock, &enp);
	if (rc != 0)
		goto fail_nic_create;
	sa->nic = enp;

	rc = sfc_mcdi_init(sa);
	if (rc != 0)
		goto fail_mcdi_init;

	sfc_log_init(sa, "probe nic");
	rc = sfc_nic_probe(sa);
	if (rc != 0)
		goto fail_nic_probe;

	sfc_log_init(sa, "done");
	return 0;

fail_nic_probe:
	sfc_mcdi_fini(sa);

fail_mcdi_init:
	sfc_log_init(sa, "destroy nic");
	sa->nic = NULL;
	efx_nic_destroy(enp);

fail_nic_create:
	sfc_mem_bar_fini(sa);

fail_mem_bar_init:
fail_family:
	sfc_log_init(sa, "failed %d", rc);
	return rc;
}

void
sfc_unprobe(struct sfc_adapter *sa)
{
	efx_nic_t *enp = sa->nic;

	sfc_log_init(sa, "entry");

	SFC_ASSERT(sfc_adapter_is_locked(sa));

	sfc_log_init(sa, "unprobe nic");
	efx_nic_unprobe(enp);

	sfc_mcdi_fini(sa);

	/*
	 * Make sure there is no pending alarm to restart since we are
	 * going to free device private which is passed as the callback
	 * opaque data. A new alarm cannot be scheduled since MCDI is
	 * shut down.
	 */
	rte_eal_alarm_cancel(sfc_restart_if_required, sa);

	sfc_log_init(sa, "destroy nic");
	sa->nic = NULL;
	efx_nic_destroy(enp);

	sfc_mem_bar_fini(sa);

	sfc_flow_fini(sa);
	sa->state = SFC_ADAPTER_UNINITIALIZED;
}

uint32_t
sfc_register_logtype(struct sfc_adapter *sa, const char *lt_prefix_str,
		     uint32_t ll_default)
{
	size_t lt_prefix_str_size = strlen(lt_prefix_str);
	size_t lt_str_size_max;
	char *lt_str = NULL;
	int ret;

	if (SIZE_MAX - PCI_PRI_STR_SIZE - 1 > lt_prefix_str_size) {
		++lt_prefix_str_size; /* Reserve space for prefix separator */
		lt_str_size_max = lt_prefix_str_size + PCI_PRI_STR_SIZE + 1;
	} else {
		return RTE_LOGTYPE_PMD;
	}

	lt_str = rte_zmalloc("logtype_str", lt_str_size_max, 0);
	if (lt_str == NULL)
		return RTE_LOGTYPE_PMD;

	strncpy(lt_str, lt_prefix_str, lt_prefix_str_size);
	lt_str[lt_prefix_str_size - 1] = '.';
	rte_pci_device_name(&sa->pci_addr, lt_str + lt_prefix_str_size,
			    lt_str_size_max - lt_prefix_str_size);
	lt_str[lt_str_size_max - 1] = '\0';

	ret = rte_log_register_type_and_pick_level(lt_str, ll_default);
	rte_free(lt_str);

	return (ret < 0) ? RTE_LOGTYPE_PMD : ret;
}