summaryrefslogtreecommitdiff
path: root/drivers/scsi/isci/phy.c
blob: 35f50c2183e18a4c6460b07db081bb7d82ff6beb (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
/*
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
 * The full GNU General Public License is included in this distribution
 * in the file called LICENSE.GPL.
 *
 * BSD LICENSE
 *
 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
 * All rights reserved.
 *
 * 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.
 *   * Neither the name of Intel Corporation nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "isci.h"
#include "host.h"
#include "phy.h"
#include "scu_event_codes.h"
#include "probe_roms.h"

/* Maximum arbitration wait time in micro-seconds */
#define SCIC_SDS_PHY_MAX_ARBITRATION_WAIT_TIME  (700)

enum sas_linkrate sci_phy_linkrate(struct isci_phy *iphy)
{
	return iphy->max_negotiated_speed;
}

static enum sci_status
sci_phy_transport_layer_initialization(struct isci_phy *iphy,
				       struct scu_transport_layer_registers __iomem *reg)
{
	u32 tl_control;

	iphy->transport_layer_registers = reg;

	writel(SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX,
		&iphy->transport_layer_registers->stp_rni);

	/*
	 * Hardware team recommends that we enable the STP prefetch for all
	 * transports
	 */
	tl_control = readl(&iphy->transport_layer_registers->control);
	tl_control |= SCU_TLCR_GEN_BIT(STP_WRITE_DATA_PREFETCH);
	writel(tl_control, &iphy->transport_layer_registers->control);

	return SCI_SUCCESS;
}

static enum sci_status
sci_phy_link_layer_initialization(struct isci_phy *iphy,
				  struct scu_link_layer_registers __iomem *reg)
{
	struct isci_host *ihost = iphy->owning_port->owning_controller;
	int phy_idx = iphy->phy_index;
	struct sci_phy_user_params *phy_user = &ihost->user_parameters.phys[phy_idx];
	struct sci_phy_oem_params *phy_oem =
		&ihost->oem_parameters.phys[phy_idx];
	u32 phy_configuration;
	struct sci_phy_cap phy_cap;
	u32 parity_check = 0;
	u32 parity_count = 0;
	u32 llctl, link_rate;
	u32 clksm_value = 0;
	u32 sp_timeouts = 0;

	iphy->link_layer_registers = reg;

	/* Set our IDENTIFY frame data */
	#define SCI_END_DEVICE 0x01

	writel(SCU_SAS_TIID_GEN_BIT(SMP_INITIATOR) |
	       SCU_SAS_TIID_GEN_BIT(SSP_INITIATOR) |
	       SCU_SAS_TIID_GEN_BIT(STP_INITIATOR) |
	       SCU_SAS_TIID_GEN_BIT(DA_SATA_HOST) |
	       SCU_SAS_TIID_GEN_VAL(DEVICE_TYPE, SCI_END_DEVICE),
	       &iphy->link_layer_registers->transmit_identification);

	/* Write the device SAS Address */
	writel(0xFEDCBA98,
	       &iphy->link_layer_registers->sas_device_name_high);
	writel(phy_idx, &iphy->link_layer_registers->sas_device_name_low);

	/* Write the source SAS Address */
	writel(phy_oem->sas_address.high,
		&iphy->link_layer_registers->source_sas_address_high);
	writel(phy_oem->sas_address.low,
		&iphy->link_layer_registers->source_sas_address_low);

	/* Clear and Set the PHY Identifier */
	writel(0, &iphy->link_layer_registers->identify_frame_phy_id);
	writel(SCU_SAS_TIPID_GEN_VALUE(ID, phy_idx),
		&iphy->link_layer_registers->identify_frame_phy_id);

	/* Change the initial state of the phy configuration register */
	phy_configuration =
		readl(&iphy->link_layer_registers->phy_configuration);

	/* Hold OOB state machine in reset */
	phy_configuration |=  SCU_SAS_PCFG_GEN_BIT(OOB_RESET);
	writel(phy_configuration,
		&iphy->link_layer_registers->phy_configuration);

	/* Configure the SNW capabilities */
	phy_cap.all = 0;
	phy_cap.start = 1;
	phy_cap.gen3_no_ssc = 1;
	phy_cap.gen2_no_ssc = 1;
	phy_cap.gen1_no_ssc = 1;
	if (ihost->oem_parameters.controller.do_enable_ssc == true) {
		phy_cap.gen3_ssc = 1;
		phy_cap.gen2_ssc = 1;
		phy_cap.gen1_ssc = 1;
	}

	/*
	 * The SAS specification indicates that the phy_capabilities that
	 * are transmitted shall have an even parity.  Calculate the parity. */
	parity_check = phy_cap.all;
	while (parity_check != 0) {
		if (parity_check & 0x1)
			parity_count++;
		parity_check >>= 1;
	}

	/*
	 * If parity indicates there are an odd number of bits set, then
	 * set the parity bit to 1 in the phy capabilities. */
	if ((parity_count % 2) != 0)
		phy_cap.parity = 1;

	writel(phy_cap.all, &iphy->link_layer_registers->phy_capabilities);

	/* Set the enable spinup period but disable the ability to send
	 * notify enable spinup
	 */
	writel(SCU_ENSPINUP_GEN_VAL(COUNT,
			phy_user->notify_enable_spin_up_insertion_frequency),
		&iphy->link_layer_registers->notify_enable_spinup_control);

	/* Write the ALIGN Insertion Ferequency for connected phy and
	 * inpendent of connected state
	 */
	clksm_value = SCU_ALIGN_INSERTION_FREQUENCY_GEN_VAL(CONNECTED,
			phy_user->in_connection_align_insertion_frequency);

	clksm_value |= SCU_ALIGN_INSERTION_FREQUENCY_GEN_VAL(GENERAL,
			phy_user->align_insertion_frequency);

	writel(clksm_value, &iphy->link_layer_registers->clock_skew_management);

	/* @todo Provide a way to write this register correctly */
	writel(0x02108421,
		&iphy->link_layer_registers->afe_lookup_table_control);

	llctl = SCU_SAS_LLCTL_GEN_VAL(NO_OUTBOUND_TASK_TIMEOUT,
		(u8)ihost->user_parameters.no_outbound_task_timeout);

	switch (phy_user->max_speed_generation) {
	case SCIC_SDS_PARM_GEN3_SPEED:
		link_rate = SCU_SAS_LINK_LAYER_CONTROL_MAX_LINK_RATE_GEN3;
		break;
	case SCIC_SDS_PARM_GEN2_SPEED:
		link_rate = SCU_SAS_LINK_LAYER_CONTROL_MAX_LINK_RATE_GEN2;
		break;
	default:
		link_rate = SCU_SAS_LINK_LAYER_CONTROL_MAX_LINK_RATE_GEN1;
		break;
	}
	llctl |= SCU_SAS_LLCTL_GEN_VAL(MAX_LINK_RATE, link_rate);
	writel(llctl, &iphy->link_layer_registers->link_layer_control);

	sp_timeouts = readl(&iphy->link_layer_registers->sas_phy_timeouts);

	/* Clear the default 0x36 (54us) RATE_CHANGE timeout value. */
	sp_timeouts &= ~SCU_SAS_PHYTOV_GEN_VAL(RATE_CHANGE, 0xFF);

	/* Set RATE_CHANGE timeout value to 0x3B (59us).  This ensures SCU can
	 * lock with 3Gb drive when SCU max rate is set to 1.5Gb.
	 */
	sp_timeouts |= SCU_SAS_PHYTOV_GEN_VAL(RATE_CHANGE, 0x3B);

	writel(sp_timeouts, &iphy->link_layer_registers->sas_phy_timeouts);

	if (is_a2(ihost->pdev)) {
		/* Program the max ARB time for the PHY to 700us so we inter-operate with
		 * the PMC expander which shuts down PHYs if the expander PHY generates too
		 * many breaks.  This time value will guarantee that the initiator PHY will
		 * generate the break.
		 */
		writel(SCIC_SDS_PHY_MAX_ARBITRATION_WAIT_TIME,
			&iphy->link_layer_registers->maximum_arbitration_wait_timer_timeout);
	}

	/* Disable link layer hang detection, rely on the OS timeout for I/O timeouts. */
	writel(0, &iphy->link_layer_registers->link_layer_hang_detection_timeout);

	/* We can exit the initial state to the stopped state */
	sci_change_state(&iphy->sm, SCI_PHY_STOPPED);

	return SCI_SUCCESS;
}

static void phy_sata_timeout(unsigned long data)
{
	struct sci_timer *tmr = (struct sci_timer *)data;
	struct isci_phy *iphy = container_of(tmr, typeof(*iphy), sata_timer);
	struct isci_host *ihost = iphy->owning_port->owning_controller;
	unsigned long flags;

	spin_lock_irqsave(&ihost->scic_lock, flags);

	if (tmr->cancel)
		goto done;

	dev_dbg(sciphy_to_dev(iphy),
		 "%s: SCIC SDS Phy 0x%p did not receive signature fis before "
		 "timeout.\n",
		 __func__,
		 iphy);

	sci_change_state(&iphy->sm, SCI_PHY_STARTING);
done:
	spin_unlock_irqrestore(&ihost->scic_lock, flags);
}

/**
 * This method returns the port currently containing this phy. If the phy is
 *    currently contained by the dummy port, then the phy is considered to not
 *    be part of a port.
 * @sci_phy: This parameter specifies the phy for which to retrieve the
 *    containing port.
 *
 * This method returns a handle to a port that contains the supplied phy.
 * NULL This value is returned if the phy is not part of a real
 * port (i.e. it's contained in the dummy port). !NULL All other
 * values indicate a handle/pointer to the port containing the phy.
 */
struct isci_port *phy_get_non_dummy_port(struct isci_phy *iphy)
{
	struct isci_port *iport = iphy->owning_port;

	if (iport->physical_port_index == SCIC_SDS_DUMMY_PORT)
		return NULL;

	return iphy->owning_port;
}

/**
 * This method will assign a port to the phy object.
 * @out]: iphy This parameter specifies the phy for which to assign a port
 *    object.
 *
 *
 */
void sci_phy_set_port(
	struct isci_phy *iphy,
	struct isci_port *iport)
{
	iphy->owning_port = iport;

	if (iphy->bcn_received_while_port_unassigned) {
		iphy->bcn_received_while_port_unassigned = false;
		sci_port_broadcast_change_received(iphy->owning_port, iphy);
	}
}

enum sci_status sci_phy_initialize(struct isci_phy *iphy,
				   struct scu_transport_layer_registers __iomem *tl,
				   struct scu_link_layer_registers __iomem *ll)
{
	/* Perfrom the initialization of the TL hardware */
	sci_phy_transport_layer_initialization(iphy, tl);

	/* Perofrm the initialization of the PE hardware */
	sci_phy_link_layer_initialization(iphy, ll);

	/* There is nothing that needs to be done in this state just
	 * transition to the stopped state
	 */
	sci_change_state(&iphy->sm, SCI_PHY_STOPPED);

	return SCI_SUCCESS;
}

/**
 * This method assigns the direct attached device ID for this phy.
 *
 * @iphy The phy for which the direct attached device id is to
 *       be assigned.
 * @device_id The direct attached device ID to assign to the phy.
 *       This will either be the RNi for the device or an invalid RNi if there
 *       is no current device assigned to the phy.
 */
void sci_phy_setup_transport(struct isci_phy *iphy, u32 device_id)
{
	u32 tl_control;

	writel(device_id, &iphy->transport_layer_registers->stp_rni);

	/*
	 * The read should guarantee that the first write gets posted
	 * before the next write
	 */
	tl_control = readl(&iphy->transport_layer_registers->control);
	tl_control |= SCU_TLCR_GEN_BIT(CLEAR_TCI_NCQ_MAPPING_TABLE);
	writel(tl_control, &iphy->transport_layer_registers->control);
}

static void sci_phy_suspend(struct isci_phy *iphy)
{
	u32 scu_sas_pcfg_value;

	scu_sas_pcfg_value =
		readl(&iphy->link_layer_registers->phy_configuration);
	scu_sas_pcfg_value |= SCU_SAS_PCFG_GEN_BIT(SUSPEND_PROTOCOL_ENGINE);
	writel(scu_sas_pcfg_value,
		&iphy->link_layer_registers->phy_configuration);

	sci_phy_setup_transport(iphy, SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX);
}

void sci_phy_resume(struct isci_phy *iphy)
{
	u32 scu_sas_pcfg_value;

	scu_sas_pcfg_value =
		readl(&iphy->link_layer_registers->phy_configuration);
	scu_sas_pcfg_value &= ~SCU_SAS_PCFG_GEN_BIT(SUSPEND_PROTOCOL_ENGINE);
	writel(scu_sas_pcfg_value,
		&iphy->link_layer_registers->phy_configuration);
}

void sci_phy_get_sas_address(struct isci_phy *iphy, struct sci_sas_address *sas)
{
	sas->high = readl(&iphy->link_layer_registers->source_sas_address_high);
	sas->low = readl(&iphy->link_layer_registers->source_sas_address_low);
}

void sci_phy_get_attached_sas_address(struct isci_phy *iphy, struct sci_sas_address *sas)
{
	struct sas_identify_frame *iaf;

	iaf = &iphy->frame_rcvd.iaf;
	memcpy(sas, iaf->sas_addr, SAS_ADDR_SIZE);
}

void sci_phy_get_protocols(struct isci_phy *iphy, struct sci_phy_proto *proto)
{
	proto->all = readl(&iphy->link_layer_registers->transmit_identification);
}

enum sci_status sci_phy_start(struct isci_phy *iphy)
{
	enum sci_phy_states state = iphy->sm.current_state_id;

	if (state != SCI_PHY_STOPPED) {
		dev_dbg(sciphy_to_dev(iphy),
			 "%s: in wrong state: %d\n", __func__, state);
		return SCI_FAILURE_INVALID_STATE;
	}

	sci_change_state(&iphy->sm, SCI_PHY_STARTING);
	return SCI_SUCCESS;
}

enum sci_status sci_phy_stop(struct isci_phy *iphy)
{
	enum sci_phy_states state = iphy->sm.current_state_id;

	switch (state) {
	case SCI_PHY_SUB_INITIAL:
	case SCI_PHY_SUB_AWAIT_OSSP_EN:
	case SCI_PHY_SUB_AWAIT_SAS_SPEED_EN:
	case SCI_PHY_SUB_AWAIT_SAS_POWER:
	case SCI_PHY_SUB_AWAIT_SATA_POWER:
	case SCI_PHY_SUB_AWAIT_SATA_PHY_EN:
	case SCI_PHY_SUB_AWAIT_SATA_SPEED_EN:
	case SCI_PHY_SUB_AWAIT_SIG_FIS_UF:
	case SCI_PHY_SUB_FINAL:
	case SCI_PHY_READY:
		break;
	default:
		dev_dbg(sciphy_to_dev(iphy),
			"%s: in wrong state: %d\n", __func__, state);
		return SCI_FAILURE_INVALID_STATE;
	}

	sci_change_state(&iphy->sm, SCI_PHY_STOPPED);
	return SCI_SUCCESS;
}

enum sci_status sci_phy_reset(struct isci_phy *iphy)
{
	enum sci_phy_states state = iphy->sm.current_state_id;

	if (state != SCI_PHY_READY) {
		dev_dbg(sciphy_to_dev(iphy),
			"%s: in wrong state: %d\n", __func__, state);
		return SCI_FAILURE_INVALID_STATE;
	}

	sci_change_state(&iphy->sm, SCI_PHY_RESETTING);
	return SCI_SUCCESS;
}

enum sci_status sci_phy_consume_power_handler(struct isci_phy *iphy)
{
	enum sci_phy_states state = iphy->sm.current_state_id;

	switch (state) {
	case SCI_PHY_SUB_AWAIT_SAS_POWER: {
		u32 enable_spinup;

		enable_spinup = readl(&iphy->link_layer_registers->notify_enable_spinup_control);
		enable_spinup |= SCU_ENSPINUP_GEN_BIT(ENABLE);
		writel(enable_spinup, &iphy->link_layer_registers->notify_enable_spinup_control);

		/* Change state to the final state this substate machine has run to completion */
		sci_change_state(&iphy->sm, SCI_PHY_SUB_FINAL);

		return SCI_SUCCESS;
	}
	case SCI_PHY_SUB_AWAIT_SATA_POWER: {
		u32 scu_sas_pcfg_value;

		/* Release the spinup hold state and reset the OOB state machine */
		scu_sas_pcfg_value =
			readl(&iphy->link_layer_registers->phy_configuration);
		scu_sas_pcfg_value &=
			~(SCU_SAS_PCFG_GEN_BIT(SATA_SPINUP_HOLD) | SCU_SAS_PCFG_GEN_BIT(OOB_ENABLE));
		scu_sas_pcfg_value |= SCU_SAS_PCFG_GEN_BIT(OOB_RESET);
		writel(scu_sas_pcfg_value,
			&iphy->link_layer_registers->phy_configuration);

		/* Now restart the OOB operation */
		scu_sas_pcfg_value &= ~SCU_SAS_PCFG_GEN_BIT(OOB_RESET);
		scu_sas_pcfg_value |= SCU_SAS_PCFG_GEN_BIT(OOB_ENABLE);
		writel(scu_sas_pcfg_value,
			&iphy->link_layer_registers->phy_configuration);

		/* Change state to the final state this substate machine has run to completion */
		sci_change_state(&iphy->sm, SCI_PHY_SUB_AWAIT_SATA_PHY_EN);

		return SCI_SUCCESS;
	}
	default:
		dev_dbg(sciphy_to_dev(iphy),
			"%s: in wrong state: %d\n", __func__, state);
		return SCI_FAILURE_INVALID_STATE;
	}
}

static void sci_phy_start_sas_link_training(struct isci_phy *iphy)
{
	/* continue the link training for the phy as if it were a SAS PHY
	 * instead of a SATA PHY. This is done because the completion queue had a SAS
	 * PHY DETECTED event when the state machine was expecting a SATA PHY event.
	 */
	u32 phy_control;

	phy_control = readl(&iphy->link_layer_registers->phy_configuration);
	phy_control |= SCU_SAS_PCFG_GEN_BIT(SATA_SPINUP_HOLD);
	writel(phy_control,
	       &iphy->link_layer_registers->phy_configuration);

	sci_change_state(&iphy->sm, SCI_PHY_SUB_AWAIT_SAS_SPEED_EN);

	iphy->protocol = SCIC_SDS_PHY_PROTOCOL_SAS;
}

static void sci_phy_start_sata_link_training(struct isci_phy *iphy)
{
	/* This method continues the link training for the phy as if it were a SATA PHY
	 * instead of a SAS PHY.  This is done because the completion queue had a SATA
	 * SPINUP HOLD event when the state machine was expecting a SAS PHY event. none
	 */
	sci_change_state(&iphy->sm, SCI_PHY_SUB_AWAIT_SATA_POWER);

	iphy->protocol = SCIC_SDS_PHY_PROTOCOL_SATA;
}

/**
 * sci_phy_complete_link_training - perform processing common to
 *    all protocols upon completion of link training.
 * @sci_phy: This parameter specifies the phy object for which link training
 *    has completed.
 * @max_link_rate: This parameter specifies the maximum link rate to be
 *    associated with this phy.
 * @next_state: This parameter specifies the next state for the phy's starting
 *    sub-state machine.
 *
 */
static void sci_phy_complete_link_training(struct isci_phy *iphy,
					   enum sas_linkrate max_link_rate,
					   u32 next_state)
{
	iphy->max_negotiated_speed = max_link_rate;

	sci_change_state(&iphy->sm, next_state);
}

enum sci_status sci_phy_event_handler(struct isci_phy *iphy, u32 event_code)
{
	enum sci_phy_states state = iphy->sm.current_state_id;

	switch (state) {
	case SCI_PHY_SUB_AWAIT_OSSP_EN:
		switch (scu_get_event_code(event_code)) {
		case SCU_EVENT_SAS_PHY_DETECTED:
			sci_phy_start_sas_link_training(iphy);
			iphy->is_in_link_training = true;
			break;
		case SCU_EVENT_SATA_SPINUP_HOLD:
			sci_phy_start_sata_link_training(iphy);
			iphy->is_in_link_training = true;
			break;
		default:
			dev_dbg(sciphy_to_dev(iphy),
				"%s: PHY starting substate machine received "
				"unexpected event_code %x\n",
				__func__,
				event_code);
			return SCI_FAILURE;
		}
		return SCI_SUCCESS;
	case SCI_PHY_SUB_AWAIT_SAS_SPEED_EN:
		switch (scu_get_event_code(event_code)) {
		case SCU_EVENT_SAS_PHY_DETECTED:
			/*
			 * Why is this being reported again by the controller?
			 * We would re-enter this state so just stay here */
			break;
		case SCU_EVENT_SAS_15:
		case SCU_EVENT_SAS_15_SSC:
			sci_phy_complete_link_training(iphy, SAS_LINK_RATE_1_5_GBPS,
						       SCI_PHY_SUB_AWAIT_IAF_UF);
			break;
		case SCU_EVENT_SAS_30:
		case SCU_EVENT_SAS_30_SSC:
			sci_phy_complete_link_training(iphy, SAS_LINK_RATE_3_0_GBPS,
						       SCI_PHY_SUB_AWAIT_IAF_UF);
			break;
		case SCU_EVENT_SAS_60:
		case SCU_EVENT_SAS_60_SSC:
			sci_phy_complete_link_training(iphy, SAS_LINK_RATE_6_0_GBPS,
						       SCI_PHY_SUB_AWAIT_IAF_UF);
			break;
		case SCU_EVENT_SATA_SPINUP_HOLD:
			/*
			 * We were doing SAS PHY link training and received a SATA PHY event
			 * continue OOB/SN as if this were a SATA PHY */
			sci_phy_start_sata_link_training(iphy);
			break;
		case SCU_EVENT_LINK_FAILURE:
			/* Link failure change state back to the starting state */
			sci_change_state(&iphy->sm, SCI_PHY_STARTING);
			break;
		default:
			dev_warn(sciphy_to_dev(iphy),
				 "%s: PHY starting substate machine received "
				 "unexpected event_code %x\n",
				 __func__, event_code);

			return SCI_FAILURE;
			break;
		}
		return SCI_SUCCESS;
	case SCI_PHY_SUB_AWAIT_IAF_UF:
		switch (scu_get_event_code(event_code)) {
		case SCU_EVENT_SAS_PHY_DETECTED:
			/* Backup the state machine */
			sci_phy_start_sas_link_training(iphy);
			break;
		case SCU_EVENT_SATA_SPINUP_HOLD:
			/* We were doing SAS PHY link training and received a
			 * SATA PHY event continue OOB/SN as if this were a
			 * SATA PHY
			 */
			sci_phy_start_sata_link_training(iphy);
			break;
		case SCU_EVENT_RECEIVED_IDENTIFY_TIMEOUT:
		case SCU_EVENT_LINK_FAILURE:
		case SCU_EVENT_HARD_RESET_RECEIVED:
			/* Start the oob/sn state machine over again */
			sci_change_state(&iphy->sm, SCI_PHY_STARTING);
			break;
		default:
			dev_warn(sciphy_to_dev(iphy),
				 "%s: PHY starting substate machine received "
				 "unexpected event_code %x\n",
				 __func__, event_code);
			return SCI_FAILURE;
		}
		return SCI_SUCCESS;
	case SCI_PHY_SUB_AWAIT_SAS_POWER:
		switch (scu_get_event_code(event_code)) {
		case SCU_EVENT_LINK_FAILURE:
			/* Link failure change state back to the starting state */
			sci_change_state(&iphy->sm, SCI_PHY_STARTING);
			break;
		default:
			dev_warn(sciphy_to_dev(iphy),
				"%s: PHY starting substate machine received unexpected "
				"event_code %x\n",
				__func__,
				event_code);
			return SCI_FAILURE;
		}
		return SCI_SUCCESS;
	case SCI_PHY_SUB_AWAIT_SATA_POWER:
		switch (scu_get_event_code(event_code)) {
		case SCU_EVENT_LINK_FAILURE:
			/* Link failure change state back to the starting state */
			sci_change_state(&iphy->sm, SCI_PHY_STARTING);
			break;
		case SCU_EVENT_SATA_SPINUP_HOLD:
			/* These events are received every 10ms and are
			 * expected while in this state
			 */
			break;

		case SCU_EVENT_SAS_PHY_DETECTED:
			/* There has been a change in the phy type before OOB/SN for the
			 * SATA finished start down the SAS link traning path.
			 */
			sci_phy_start_sas_link_training(iphy);
			break;

		default:
			dev_warn(sciphy_to_dev(iphy),
				 "%s: PHY starting substate machine received "
				 "unexpected event_code %x\n",
				 __func__, event_code);

			return SCI_FAILURE;
		}
		return SCI_SUCCESS;
	case SCI_PHY_SUB_AWAIT_SATA_PHY_EN:
		switch (scu_get_event_code(event_code)) {
		case SCU_EVENT_LINK_FAILURE:
			/* Link failure change state back to the starting state */
			sci_change_state(&iphy->sm, SCI_PHY_STARTING);
			break;
		case SCU_EVENT_SATA_SPINUP_HOLD:
			/* These events might be received since we dont know how many may be in
			 * the completion queue while waiting for power
			 */
			break;
		case SCU_EVENT_SATA_PHY_DETECTED:
			iphy->protocol = SCIC_SDS_PHY_PROTOCOL_SATA;

			/* We have received the SATA PHY notification change state */
			sci_change_state(&iphy->sm, SCI_PHY_SUB_AWAIT_SATA_SPEED_EN);
			break;
		case SCU_EVENT_SAS_PHY_DETECTED:
			/* There has been a change in the phy type before OOB/SN for the
			 * SATA finished start down the SAS link traning path.
			 */
			sci_phy_start_sas_link_training(iphy);
			break;
		default:
			dev_warn(sciphy_to_dev(iphy),
				 "%s: PHY starting substate machine received "
				 "unexpected event_code %x\n",
				 __func__,
				 event_code);

			return SCI_FAILURE;
		}
		return SCI_SUCCESS;
	case SCI_PHY_SUB_AWAIT_SATA_SPEED_EN:
		switch (scu_get_event_code(event_code)) {
		case SCU_EVENT_SATA_PHY_DETECTED:
			/*
			 * The hardware reports multiple SATA PHY detected events
			 * ignore the extras */
			break;
		case SCU_EVENT_SATA_15:
		case SCU_EVENT_SATA_15_SSC:
			sci_phy_complete_link_training(iphy, SAS_LINK_RATE_1_5_GBPS,
						       SCI_PHY_SUB_AWAIT_SIG_FIS_UF);
			break;
		case SCU_EVENT_SATA_30:
		case SCU_EVENT_SATA_30_SSC:
			sci_phy_complete_link_training(iphy, SAS_LINK_RATE_3_0_GBPS,
						       SCI_PHY_SUB_AWAIT_SIG_FIS_UF);
			break;
		case SCU_EVENT_SATA_60:
		case SCU_EVENT_SATA_60_SSC:
			sci_phy_complete_link_training(iphy, SAS_LINK_RATE_6_0_GBPS,
						       SCI_PHY_SUB_AWAIT_SIG_FIS_UF);
			break;
		case SCU_EVENT_LINK_FAILURE:
			/* Link failure change state back to the starting state */
			sci_change_state(&iphy->sm, SCI_PHY_STARTING);
			break;
		case SCU_EVENT_SAS_PHY_DETECTED:
			/*
			 * There has been a change in the phy type before OOB/SN for the
			 * SATA finished start down the SAS link traning path. */
			sci_phy_start_sas_link_training(iphy);
			break;
		default:
			dev_warn(sciphy_to_dev(iphy),
				 "%s: PHY starting substate machine received "
				 "unexpected event_code %x\n",
				 __func__, event_code);

			return SCI_FAILURE;
		}

		return SCI_SUCCESS;
	case SCI_PHY_SUB_AWAIT_SIG_FIS_UF:
		switch (scu_get_event_code(event_code)) {
		case SCU_EVENT_SATA_PHY_DETECTED:
			/* Backup the state machine */
			sci_change_state(&iphy->sm, SCI_PHY_SUB_AWAIT_SATA_SPEED_EN);
			break;

		case SCU_EVENT_LINK_FAILURE:
			/* Link failure change state back to the starting state */
			sci_change_state(&iphy->sm, SCI_PHY_STARTING);
			break;

		default:
			dev_warn(sciphy_to_dev(iphy),
				 "%s: PHY starting substate machine received "
				 "unexpected event_code %x\n",
				 __func__,
				 event_code);

			return SCI_FAILURE;
		}
		return SCI_SUCCESS;
	case SCI_PHY_READY:
		switch (scu_get_event_code(event_code)) {
		case SCU_EVENT_LINK_FAILURE:
			/* Link failure change state back to the starting state */
			sci_change_state(&iphy->sm, SCI_PHY_STARTING);
			break;
		case SCU_EVENT_BROADCAST_CHANGE:
			/* Broadcast change received. Notify the port. */
			if (phy_get_non_dummy_port(iphy) != NULL)
				sci_port_broadcast_change_received(iphy->owning_port, iphy);
			else
				iphy->bcn_received_while_port_unassigned = true;
			break;
		default:
			dev_warn(sciphy_to_dev(iphy),
				 "%sP SCIC PHY 0x%p ready state machine received "
				 "unexpected event_code %x\n",
				 __func__, iphy, event_code);
			return SCI_FAILURE_INVALID_STATE;
		}
		return SCI_SUCCESS;
	case SCI_PHY_RESETTING:
		switch (scu_get_event_code(event_code)) {
		case SCU_EVENT_HARD_RESET_TRANSMITTED:
			/* Link failure change state back to the starting state */
			sci_change_state(&iphy->sm, SCI_PHY_STARTING);
			break;
		default:
			dev_warn(sciphy_to_dev(iphy),
				 "%s: SCIC PHY 0x%p resetting state machine received "
				 "unexpected event_code %x\n",
				 __func__, iphy, event_code);

			return SCI_FAILURE_INVALID_STATE;
			break;
		}
		return SCI_SUCCESS;
	default:
		dev_dbg(sciphy_to_dev(iphy),
			"%s: in wrong state: %d\n", __func__, state);
		return SCI_FAILURE_INVALID_STATE;
	}
}

enum sci_status sci_phy_frame_handler(struct isci_phy *iphy, u32 frame_index)
{
	enum sci_phy_states state = iphy->sm.current_state_id;
	struct isci_host *ihost = iphy->owning_port->owning_controller;
	enum sci_status result;
	unsigned long flags;

	switch (state) {
	case SCI_PHY_SUB_AWAIT_IAF_UF: {
		u32 *frame_words;
		struct sas_identify_frame iaf;

		result = sci_unsolicited_frame_control_get_header(&ihost->uf_control,
								  frame_index,
								  (void **)&frame_words);

		if (result != SCI_SUCCESS)
			return result;

		sci_swab32_cpy(&iaf, frame_words, sizeof(iaf) / sizeof(u32));
		if (iaf.frame_type == 0) {
			u32 state;

			spin_lock_irqsave(&iphy->sas_phy.frame_rcvd_lock, flags);
			memcpy(&iphy->frame_rcvd.iaf, &iaf, sizeof(iaf));
			spin_unlock_irqrestore(&iphy->sas_phy.frame_rcvd_lock, flags);
			if (iaf.smp_tport) {
				/* We got the IAF for an expander PHY go to the final
				 * state since there are no power requirements for
				 * expander phys.
				 */
				state = SCI_PHY_SUB_FINAL;
			} else {
				/* We got the IAF we can now go to the await spinup
				 * semaphore state
				 */
				state = SCI_PHY_SUB_AWAIT_SAS_POWER;
			}
			sci_change_state(&iphy->sm, state);
			result = SCI_SUCCESS;
		} else
			dev_warn(sciphy_to_dev(iphy),
				"%s: PHY starting substate machine received "
				"unexpected frame id %x\n",
				__func__, frame_index);

		sci_controller_release_frame(ihost, frame_index);
		return result;
	}
	case SCI_PHY_SUB_AWAIT_SIG_FIS_UF: {
		struct dev_to_host_fis *frame_header;
		u32 *fis_frame_data;

		result = sci_unsolicited_frame_control_get_header(&ihost->uf_control,
								  frame_index,
								  (void **)&frame_header);

		if (result != SCI_SUCCESS)
			return result;

		if ((frame_header->fis_type == FIS_REGD2H) &&
		    !(frame_header->status & ATA_BUSY)) {
			sci_unsolicited_frame_control_get_buffer(&ihost->uf_control,
								 frame_index,
								 (void **)&fis_frame_data);

			spin_lock_irqsave(&iphy->sas_phy.frame_rcvd_lock, flags);
			sci_controller_copy_sata_response(&iphy->frame_rcvd.fis,
							  frame_header,
							  fis_frame_data);
			spin_unlock_irqrestore(&iphy->sas_phy.frame_rcvd_lock, flags);

			/* got IAF we can now go to the await spinup semaphore state */
			sci_change_state(&iphy->sm, SCI_PHY_SUB_FINAL);

			result = SCI_SUCCESS;
		} else
			dev_warn(sciphy_to_dev(iphy),
				 "%s: PHY starting substate machine received "
				 "unexpected frame id %x\n",
				 __func__, frame_index);

		/* Regardless of the result we are done with this frame with it */
		sci_controller_release_frame(ihost, frame_index);

		return result;
	}
	default:
		dev_dbg(sciphy_to_dev(iphy),
			"%s: in wrong state: %d\n", __func__, state);
		return SCI_FAILURE_INVALID_STATE;
	}

}

static void sci_phy_starting_initial_substate_enter(struct sci_base_state_machine *sm)
{
	struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);

	/* This is just an temporary state go off to the starting state */
	sci_change_state(&iphy->sm, SCI_PHY_SUB_AWAIT_OSSP_EN);
}

static void sci_phy_starting_await_sas_power_substate_enter(struct sci_base_state_machine *sm)
{
	struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);
	struct isci_host *ihost = iphy->owning_port->owning_controller;

	sci_controller_power_control_queue_insert(ihost, iphy);
}

static void sci_phy_starting_await_sas_power_substate_exit(struct sci_base_state_machine *sm)
{
	struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);
	struct isci_host *ihost = iphy->owning_port->owning_controller;

	sci_controller_power_control_queue_remove(ihost, iphy);
}

static void sci_phy_starting_await_sata_power_substate_enter(struct sci_base_state_machine *sm)
{
	struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);
	struct isci_host *ihost = iphy->owning_port->owning_controller;

	sci_controller_power_control_queue_insert(ihost, iphy);
}

static void sci_phy_starting_await_sata_power_substate_exit(struct sci_base_state_machine *sm)
{
	struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);
	struct isci_host *ihost = iphy->owning_port->owning_controller;

	sci_controller_power_control_queue_remove(ihost, iphy);
}

static void sci_phy_starting_await_sata_phy_substate_enter(struct sci_base_state_machine *sm)
{
	struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);

	sci_mod_timer(&iphy->sata_timer, SCIC_SDS_SATA_LINK_TRAINING_TIMEOUT);
}

static void sci_phy_starting_await_sata_phy_substate_exit(struct sci_base_state_machine *sm)
{
	struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);

	sci_del_timer(&iphy->sata_timer);
}

static void sci_phy_starting_await_sata_speed_substate_enter(struct sci_base_state_machine *sm)
{
	struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);

	sci_mod_timer(&iphy->sata_timer, SCIC_SDS_SATA_LINK_TRAINING_TIMEOUT);
}

static void sci_phy_starting_await_sata_speed_substate_exit(struct sci_base_state_machine *sm)
{
	struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);

	sci_del_timer(&iphy->sata_timer);
}

static void sci_phy_starting_await_sig_fis_uf_substate_enter(struct sci_base_state_machine *sm)
{
	struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);

	if (sci_port_link_detected(iphy->owning_port, iphy)) {

		/*
		 * Clear the PE suspend condition so we can actually
		 * receive SIG FIS
		 * The hardware will not respond to the XRDY until the PE
		 * suspend condition is cleared.
		 */
		sci_phy_resume(iphy);

		sci_mod_timer(&iphy->sata_timer,
			      SCIC_SDS_SIGNATURE_FIS_TIMEOUT);
	} else
		iphy->is_in_link_training = false;
}

static void sci_phy_starting_await_sig_fis_uf_substate_exit(struct sci_base_state_machine *sm)
{
	struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);

	sci_del_timer(&iphy->sata_timer);
}

static void sci_phy_starting_final_substate_enter(struct sci_base_state_machine *sm)
{
	struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);

	/* State machine has run to completion so exit out and change
	 * the base state machine to the ready state
	 */
	sci_change_state(&iphy->sm, SCI_PHY_READY);
}

/**
 *
 * @sci_phy: This is the struct isci_phy object to stop.
 *
 * This method will stop the struct isci_phy object. This does not reset the
 * protocol engine it just suspends it and places it in a state where it will
 * not cause the end device to power up. none
 */
static void scu_link_layer_stop_protocol_engine(
	struct isci_phy *iphy)
{
	u32 scu_sas_pcfg_value;
	u32 enable_spinup_value;

	/* Suspend the protocol engine and place it in a sata spinup hold state */
	scu_sas_pcfg_value =
		readl(&iphy->link_layer_registers->phy_configuration);
	scu_sas_pcfg_value |=
		(SCU_SAS_PCFG_GEN_BIT(OOB_RESET) |
		 SCU_SAS_PCFG_GEN_BIT(SUSPEND_PROTOCOL_ENGINE) |
		 SCU_SAS_PCFG_GEN_BIT(SATA_SPINUP_HOLD));
	writel(scu_sas_pcfg_value,
	       &iphy->link_layer_registers->phy_configuration);

	/* Disable the notify enable spinup primitives */
	enable_spinup_value = readl(&iphy->link_layer_registers->notify_enable_spinup_control);
	enable_spinup_value &= ~SCU_ENSPINUP_GEN_BIT(ENABLE);
	writel(enable_spinup_value, &iphy->link_layer_registers->notify_enable_spinup_control);
}

/**
 *
 *
 * This method will start the OOB/SN state machine for this struct isci_phy object.
 */
static void scu_link_layer_start_oob(
	struct isci_phy *iphy)
{
	u32 scu_sas_pcfg_value;

	scu_sas_pcfg_value =
		readl(&iphy->link_layer_registers->phy_configuration);
	scu_sas_pcfg_value |= SCU_SAS_PCFG_GEN_BIT(OOB_ENABLE);
	scu_sas_pcfg_value &=
		~(SCU_SAS_PCFG_GEN_BIT(OOB_RESET) |
		SCU_SAS_PCFG_GEN_BIT(HARD_RESET));
	writel(scu_sas_pcfg_value,
	       &iphy->link_layer_registers->phy_configuration);
}

/**
 *
 *
 * This method will transmit a hard reset request on the specified phy. The SCU
 * hardware requires that we reset the OOB state machine and set the hard reset
 * bit in the phy configuration register. We then must start OOB over with the
 * hard reset bit set.
 */
static void scu_link_layer_tx_hard_reset(
	struct isci_phy *iphy)
{
	u32 phy_configuration_value;

	/*
	 * SAS Phys must wait for the HARD_RESET_TX event notification to transition
	 * to the starting state. */
	phy_configuration_value =
		readl(&iphy->link_layer_registers->phy_configuration);
	phy_configuration_value |=
		(SCU_SAS_PCFG_GEN_BIT(HARD_RESET) |
		 SCU_SAS_PCFG_GEN_BIT(OOB_RESET));
	writel(phy_configuration_value,
	       &iphy->link_layer_registers->phy_configuration);

	/* Now take the OOB state machine out of reset */
	phy_configuration_value |= SCU_SAS_PCFG_GEN_BIT(OOB_ENABLE);
	phy_configuration_value &= ~SCU_SAS_PCFG_GEN_BIT(OOB_RESET);
	writel(phy_configuration_value,
	       &iphy->link_layer_registers->phy_configuration);
}

static void sci_phy_stopped_state_enter(struct sci_base_state_machine *sm)
{
	struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);
	struct isci_port *iport = iphy->owning_port;
	struct isci_host *ihost = iport->owning_controller;

	/*
	 * @todo We need to get to the controller to place this PE in a
	 * reset state
	 */
	sci_del_timer(&iphy->sata_timer);

	scu_link_layer_stop_protocol_engine(iphy);

	if (iphy->sm.previous_state_id != SCI_PHY_INITIAL)
		sci_controller_link_down(ihost, phy_get_non_dummy_port(iphy), iphy);
}

static void sci_phy_starting_state_enter(struct sci_base_state_machine *sm)
{
	struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);
	struct isci_port *iport = iphy->owning_port;
	struct isci_host *ihost = iport->owning_controller;

	scu_link_layer_stop_protocol_engine(iphy);
	scu_link_layer_start_oob(iphy);

	/* We don't know what kind of phy we are going to be just yet */
	iphy->protocol = SCIC_SDS_PHY_PROTOCOL_UNKNOWN;
	iphy->bcn_received_while_port_unassigned = false;

	if (iphy->sm.previous_state_id == SCI_PHY_READY)
		sci_controller_link_down(ihost, phy_get_non_dummy_port(iphy), iphy);

	sci_change_state(&iphy->sm, SCI_PHY_SUB_INITIAL);
}

static void sci_phy_ready_state_enter(struct sci_base_state_machine *sm)
{
	struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);
	struct isci_port *iport = iphy->owning_port;
	struct isci_host *ihost = iport->owning_controller;

	sci_controller_link_up(ihost, phy_get_non_dummy_port(iphy), iphy);
}

static void sci_phy_ready_state_exit(struct sci_base_state_machine *sm)
{
	struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);

	sci_phy_suspend(iphy);
}

static void sci_phy_resetting_state_enter(struct sci_base_state_machine *sm)
{
	struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm);

	/* The phy is being reset, therefore deactivate it from the port.  In
	 * the resetting state we don't notify the user regarding link up and
	 * link down notifications
	 */
	sci_port_deactivate_phy(iphy->owning_port, iphy, false);

	if (iphy->protocol == SCIC_SDS_PHY_PROTOCOL_SAS) {
		scu_link_layer_tx_hard_reset(iphy);
	} else {
		/* The SCU does not need to have a discrete reset state so
		 * just go back to the starting state.
		 */
		sci_change_state(&iphy->sm, SCI_PHY_STARTING);
	}
}

static const struct sci_base_state sci_phy_state_table[] = {
	[SCI_PHY_INITIAL] = { },
	[SCI_PHY_STOPPED] = {
		.enter_state = sci_phy_stopped_state_enter,
	},
	[SCI_PHY_STARTING] = {
		.enter_state = sci_phy_starting_state_enter,
	},
	[SCI_PHY_SUB_INITIAL] = {
		.enter_state = sci_phy_starting_initial_substate_enter,
	},
	[SCI_PHY_SUB_AWAIT_OSSP_EN] = { },
	[SCI_PHY_SUB_AWAIT_SAS_SPEED_EN] = { },
	[SCI_PHY_SUB_AWAIT_IAF_UF] = { },
	[SCI_PHY_SUB_AWAIT_SAS_POWER] = {
		.enter_state = sci_phy_starting_await_sas_power_substate_enter,
		.exit_state  = sci_phy_starting_await_sas_power_substate_exit,
	},
	[SCI_PHY_SUB_AWAIT_SATA_POWER] = {
		.enter_state = sci_phy_starting_await_sata_power_substate_enter,
		.exit_state  = sci_phy_starting_await_sata_power_substate_exit
	},
	[SCI_PHY_SUB_AWAIT_SATA_PHY_EN] = {
		.enter_state = sci_phy_starting_await_sata_phy_substate_enter,
		.exit_state  = sci_phy_starting_await_sata_phy_substate_exit
	},
	[SCI_PHY_SUB_AWAIT_SATA_SPEED_EN] = {
		.enter_state = sci_phy_starting_await_sata_speed_substate_enter,
		.exit_state  = sci_phy_starting_await_sata_speed_substate_exit
	},
	[SCI_PHY_SUB_AWAIT_SIG_FIS_UF] = {
		.enter_state = sci_phy_starting_await_sig_fis_uf_substate_enter,
		.exit_state  = sci_phy_starting_await_sig_fis_uf_substate_exit
	},
	[SCI_PHY_SUB_FINAL] = {
		.enter_state = sci_phy_starting_final_substate_enter,
	},
	[SCI_PHY_READY] = {
		.enter_state = sci_phy_ready_state_enter,
		.exit_state = sci_phy_ready_state_exit,
	},
	[SCI_PHY_RESETTING] = {
		.enter_state = sci_phy_resetting_state_enter,
	},
	[SCI_PHY_FINAL] = { },
};

void sci_phy_construct(struct isci_phy *iphy,
			    struct isci_port *iport, u8 phy_index)
{
	sci_init_sm(&iphy->sm, sci_phy_state_table, SCI_PHY_INITIAL);

	/* Copy the rest of the input data to our locals */
	iphy->owning_port = iport;
	iphy->phy_index = phy_index;
	iphy->bcn_received_while_port_unassigned = false;
	iphy->protocol = SCIC_SDS_PHY_PROTOCOL_UNKNOWN;
	iphy->link_layer_registers = NULL;
	iphy->max_negotiated_speed = SAS_LINK_RATE_UNKNOWN;

	/* Create the SIGNATURE FIS Timeout timer for this phy */
	sci_init_timer(&iphy->sata_timer, phy_sata_timeout);
}

void isci_phy_init(struct isci_phy *iphy, struct isci_host *ihost, int index)
{
	struct sci_oem_params *oem = &ihost->oem_parameters;
	u64 sci_sas_addr;
	__be64 sas_addr;

	sci_sas_addr = oem->phys[index].sas_address.high;
	sci_sas_addr <<= 32;
	sci_sas_addr |= oem->phys[index].sas_address.low;
	sas_addr = cpu_to_be64(sci_sas_addr);
	memcpy(iphy->sas_addr, &sas_addr, sizeof(sas_addr));

	iphy->isci_port = NULL;
	iphy->sas_phy.enabled = 0;
	iphy->sas_phy.id = index;
	iphy->sas_phy.sas_addr = &iphy->sas_addr[0];
	iphy->sas_phy.frame_rcvd = (u8 *)&iphy->frame_rcvd;
	iphy->sas_phy.ha = &ihost->sas_ha;
	iphy->sas_phy.lldd_phy = iphy;
	iphy->sas_phy.enabled = 1;
	iphy->sas_phy.class = SAS;
	iphy->sas_phy.iproto = SAS_PROTOCOL_ALL;
	iphy->sas_phy.tproto = 0;
	iphy->sas_phy.type = PHY_TYPE_PHYSICAL;
	iphy->sas_phy.role = PHY_ROLE_INITIATOR;
	iphy->sas_phy.oob_mode = OOB_NOT_CONNECTED;
	iphy->sas_phy.linkrate = SAS_LINK_RATE_UNKNOWN;
	memset(&iphy->frame_rcvd, 0, sizeof(iphy->frame_rcvd));
}


/**
 * isci_phy_control() - This function is one of the SAS Domain Template
 *    functions. This is a phy management function.
 * @phy: This parameter specifies the sphy being controlled.
 * @func: This parameter specifies the phy control function being invoked.
 * @buf: This parameter is specific to the phy function being invoked.
 *
 * status, zero indicates success.
 */
int isci_phy_control(struct asd_sas_phy *sas_phy,
		     enum phy_func func,
		     void *buf)
{
	int ret = 0;
	struct isci_phy *iphy = sas_phy->lldd_phy;
	struct isci_port *iport = iphy->isci_port;
	struct isci_host *ihost = sas_phy->ha->lldd_ha;
	unsigned long flags;

	dev_dbg(&ihost->pdev->dev,
		"%s: phy %p; func %d; buf %p; isci phy %p, port %p\n",
		__func__, sas_phy, func, buf, iphy, iport);

	switch (func) {
	case PHY_FUNC_DISABLE:
		spin_lock_irqsave(&ihost->scic_lock, flags);
		sci_phy_stop(iphy);
		spin_unlock_irqrestore(&ihost->scic_lock, flags);
		break;

	case PHY_FUNC_LINK_RESET:
		spin_lock_irqsave(&ihost->scic_lock, flags);
		sci_phy_stop(iphy);
		sci_phy_start(iphy);
		spin_unlock_irqrestore(&ihost->scic_lock, flags);
		break;

	case PHY_FUNC_HARD_RESET:
		if (!iport)
			return -ENODEV;

		/* Perform the port reset. */
		ret = isci_port_perform_hard_reset(ihost, iport, iphy);

		break;
	case PHY_FUNC_GET_EVENTS: {
		struct scu_link_layer_registers __iomem *r;
		struct sas_phy *phy = sas_phy->phy;

		r = iphy->link_layer_registers;
		phy->running_disparity_error_count = readl(&r->running_disparity_error_count);
		phy->loss_of_dword_sync_count = readl(&r->loss_of_sync_error_count);
		phy->phy_reset_problem_count = readl(&r->phy_reset_problem_count);
		phy->invalid_dword_count = readl(&r->invalid_dword_counter);
		break;
	}

	default:
		dev_dbg(&ihost->pdev->dev,
			   "%s: phy %p; func %d NOT IMPLEMENTED!\n",
			   __func__, sas_phy, func);
		ret = -ENOSYS;
		break;
	}
	return ret;
}