summaryrefslogtreecommitdiffstats
path: root/drivers/platform/x86/intel_telemetry_pltdrv.c
blob: e0424d5a795a5e0a5baa969546df60252c9a230e (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
/*
 * Intel SOC Telemetry Platform Driver: Currently supports APL
 * Copyright (c) 2015, Intel Corporation.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope 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.
 *
 * This file provides the platform specific telemetry implementation for APL.
 * It used the PUNIT and PMC IPC interfaces for configuring the counters.
 * The accumulated results are fetched from SRAM.
 */
#include <linux/module.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/io.h>
#include <linux/uaccess.h>
#include <linux/pci.h>
#include <linux/suspend.h>
#include <linux/platform_device.h>

#include <asm/cpu_device_id.h>
#include <asm/intel-family.h>
#include <asm/intel_pmc_ipc.h>
#include <asm/intel_punit_ipc.h>
#include <asm/intel_telemetry.h>

#define DRIVER_NAME	"intel_telemetry"
#define DRIVER_VERSION	"1.0.0"

#define TELEM_TRC_VERBOSITY_MASK	0x3

#define TELEM_MIN_PERIOD(x)		((x) & 0x7F0000)
#define TELEM_MAX_PERIOD(x)		((x) & 0x7F000000)
#define TELEM_SAMPLE_PERIOD_INVALID(x)	((x) & (BIT(7)))
#define TELEM_CLEAR_SAMPLE_PERIOD(x)	((x) &= ~0x7F)

#define TELEM_SAMPLING_DEFAULT_PERIOD	0xD

#define TELEM_MAX_EVENTS_SRAM		28
#define TELEM_SSRAM_STARTTIME_OFFSET	8
#define TELEM_SSRAM_EVTLOG_OFFSET	16

#define IOSS_TELEM_EVENT_READ		0x0
#define IOSS_TELEM_EVENT_WRITE		0x1
#define IOSS_TELEM_INFO_READ		0x2
#define IOSS_TELEM_TRACE_CTL_READ	0x5
#define IOSS_TELEM_TRACE_CTL_WRITE	0x6
#define IOSS_TELEM_EVENT_CTL_READ	0x7
#define IOSS_TELEM_EVENT_CTL_WRITE	0x8
#define IOSS_TELEM_EVT_CTRL_WRITE_SIZE	0x4
#define IOSS_TELEM_READ_WORD		0x1
#define IOSS_TELEM_WRITE_FOURBYTES	0x4
#define IOSS_TELEM_EVT_WRITE_SIZE	0x3

#define TELEM_INFO_SRAMEVTS_MASK	0xFF00
#define TELEM_INFO_SRAMEVTS_SHIFT	0x8
#define TELEM_SSRAM_READ_TIMEOUT	10

#define TELEM_INFO_NENABLES_MASK	0xFF
#define TELEM_EVENT_ENABLE		0x8000

#define TELEM_MASK_BIT			1
#define TELEM_MASK_BYTE			0xFF
#define BYTES_PER_LONG			8
#define TELEM_MASK_PCS_STATE		0xF

#define TELEM_DISABLE(x)		((x) &= ~(BIT(31)))
#define TELEM_CLEAR_EVENTS(x)		((x) |= (BIT(30)))
#define TELEM_ENABLE_SRAM_EVT_TRACE(x)	((x) &= ~(BIT(30) | BIT(24)))
#define TELEM_ENABLE_PERIODIC(x)	((x) |= (BIT(23) | BIT(31) | BIT(7)))
#define TELEM_EXTRACT_VERBOSITY(x, y)	((y) = (((x) >> 27) & 0x3))
#define TELEM_CLEAR_VERBOSITY_BITS(x)	((x) &= ~(BIT(27) | BIT(28)))
#define TELEM_SET_VERBOSITY_BITS(x, y)	((x) |= ((y) << 27))

#define TELEM_CPU(model, data) \
	{ X86_VENDOR_INTEL, 6, model, X86_FEATURE_ANY, (unsigned long)&data }

enum telemetry_action {
	TELEM_UPDATE = 0,
	TELEM_ADD,
	TELEM_RESET,
	TELEM_ACTION_NONE
};

struct telem_ssram_region {
	u64 timestamp;
	u64 start_time;
	u64 events[TELEM_MAX_EVENTS_SRAM];
};

static struct telemetry_plt_config *telm_conf;

/*
 * The following counters are programmed by default during setup.
 * Only 20 allocated to kernel driver
 */
static struct telemetry_evtmap
	telemetry_apl_ioss_default_events[TELEM_MAX_OS_ALLOCATED_EVENTS] = {
	{"SOC_S0IX_TOTAL_RES",			0x4800},
	{"SOC_S0IX_TOTAL_OCC",			0x4000},
	{"SOC_S0IX_SHALLOW_RES",		0x4801},
	{"SOC_S0IX_SHALLOW_OCC",		0x4001},
	{"SOC_S0IX_DEEP_RES",			0x4802},
	{"SOC_S0IX_DEEP_OCC",			0x4002},
	{"PMC_POWER_GATE",			0x5818},
	{"PMC_D3_STATES",			0x5819},
	{"PMC_D0I3_STATES",			0x581A},
	{"PMC_S0IX_WAKE_REASON_GPIO",		0x6000},
	{"PMC_S0IX_WAKE_REASON_TIMER",		0x6001},
	{"PMC_S0IX_WAKE_REASON_VNNREQ",         0x6002},
	{"PMC_S0IX_WAKE_REASON_LOWPOWER",       0x6003},
	{"PMC_S0IX_WAKE_REASON_EXTERNAL",       0x6004},
	{"PMC_S0IX_WAKE_REASON_MISC",           0x6005},
	{"PMC_S0IX_BLOCKING_IPS_D3_D0I3",       0x6006},
	{"PMC_S0IX_BLOCKING_IPS_PG",            0x6007},
	{"PMC_S0IX_BLOCKING_MISC_IPS_PG",       0x6008},
	{"PMC_S0IX_BLOCK_IPS_VNN_REQ",          0x6009},
	{"PMC_S0IX_BLOCK_IPS_CLOCKS",           0x600B},
};


static struct telemetry_evtmap
	telemetry_apl_pss_default_events[TELEM_MAX_OS_ALLOCATED_EVENTS] = {
	{"IA_CORE0_C6_RES",			0x0400},
	{"IA_CORE0_C6_CTR",			0x0000},
	{"IA_MODULE0_C7_RES",			0x0410},
	{"IA_MODULE0_C7_CTR",			0x000E},
	{"IA_C0_RES",				0x0805},
	{"PCS_LTR",				0x2801},
	{"PSTATES",				0x2802},
	{"SOC_S0I3_RES",			0x0409},
	{"SOC_S0I3_CTR",			0x000A},
	{"PCS_S0I3_CTR",			0x0009},
	{"PCS_C1E_RES",				0x041A},
	{"PCS_IDLE_STATUS",			0x2806},
	{"IA_PERF_LIMITS",			0x280B},
	{"GT_PERF_LIMITS",			0x280C},
	{"PCS_WAKEUP_S0IX_CTR",			0x0030},
	{"PCS_IDLE_BLOCKED",			0x2C00},
	{"PCS_S0IX_BLOCKED",			0x2C01},
	{"PCS_S0IX_WAKE_REASONS",		0x2C02},
	{"PCS_LTR_BLOCKING",			0x2C03},
	{"PC2_AND_MEM_SHALLOW_IDLE_RES",	0x1D40},
};

static struct telemetry_evtmap
	telemetry_glk_pss_default_events[TELEM_MAX_OS_ALLOCATED_EVENTS] = {
	{"IA_CORE0_C6_RES",			0x0400},
	{"IA_CORE0_C6_CTR",			0x0000},
	{"IA_MODULE0_C7_RES",			0x0410},
	{"IA_MODULE0_C7_CTR",			0x000C},
	{"IA_C0_RES",				0x0805},
	{"PCS_LTR",				0x2801},
	{"PSTATES",				0x2802},
	{"SOC_S0I3_RES",			0x0407},
	{"SOC_S0I3_CTR",			0x0008},
	{"PCS_S0I3_CTR",			0x0007},
	{"PCS_C1E_RES",				0x0414},
	{"PCS_IDLE_STATUS",			0x2806},
	{"IA_PERF_LIMITS",			0x280B},
	{"GT_PERF_LIMITS",			0x280C},
	{"PCS_WAKEUP_S0IX_CTR",			0x0025},
	{"PCS_IDLE_BLOCKED",			0x2C00},
	{"PCS_S0IX_BLOCKED",			0x2C01},
	{"PCS_S0IX_WAKE_REASONS",		0x2C02},
	{"PCS_LTR_BLOCKING",			0x2C03},
	{"PC2_AND_MEM_SHALLOW_IDLE_RES",	0x1D40},
};

/* APL specific Data */
static struct telemetry_plt_config telem_apl_config = {
	.pss_config = {
		.telem_evts = telemetry_apl_pss_default_events,
	},
	.ioss_config = {
		.telem_evts = telemetry_apl_ioss_default_events,
	},
};

/* GLK specific Data */
static struct telemetry_plt_config telem_glk_config = {
	.pss_config = {
		.telem_evts = telemetry_glk_pss_default_events,
	},
	.ioss_config = {
		.telem_evts = telemetry_apl_ioss_default_events,
	},
};

static const struct x86_cpu_id telemetry_cpu_ids[] = {
	TELEM_CPU(INTEL_FAM6_ATOM_GOLDMONT, telem_apl_config),
	TELEM_CPU(INTEL_FAM6_ATOM_GEMINI_LAKE, telem_glk_config),
	{}
};

MODULE_DEVICE_TABLE(x86cpu, telemetry_cpu_ids);

static inline int telem_get_unitconfig(enum telemetry_unit telem_unit,
				     struct telemetry_unit_config **unit_config)
{
	if (telem_unit == TELEM_PSS)
		*unit_config = &(telm_conf->pss_config);
	else if (telem_unit == TELEM_IOSS)
		*unit_config = &(telm_conf->ioss_config);
	else
		return -EINVAL;

	return 0;

}

static int telemetry_check_evtid(enum telemetry_unit telem_unit,
				 u32 *evtmap, u8 len,
				 enum telemetry_action action)
{
	struct telemetry_unit_config *unit_config;
	int ret;

	ret = telem_get_unitconfig(telem_unit, &unit_config);
	if (ret < 0)
		return ret;

	switch (action) {
	case TELEM_RESET:
		if (len > TELEM_MAX_EVENTS_SRAM)
			return -EINVAL;

		break;

	case TELEM_UPDATE:
		if (len > TELEM_MAX_EVENTS_SRAM)
			return -EINVAL;

		if ((len > 0) && (evtmap == NULL))
			return -EINVAL;

		break;

	case TELEM_ADD:
		if ((len + unit_config->ssram_evts_used) >
		    TELEM_MAX_EVENTS_SRAM)
			return -EINVAL;

		if ((len > 0) && (evtmap == NULL))
			return -EINVAL;

		break;

	default:
		pr_err("Unknown Telemetry action Specified %d\n", action);
		return -EINVAL;
	}

	return 0;
}


static inline int telemetry_plt_config_ioss_event(u32 evt_id, int index)
{
	u32 write_buf;
	int ret;

	write_buf = evt_id | TELEM_EVENT_ENABLE;
	write_buf <<= BITS_PER_BYTE;
	write_buf |= index;

	ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
				    IOSS_TELEM_EVENT_WRITE, (u8 *)&write_buf,
				    IOSS_TELEM_EVT_WRITE_SIZE, NULL, 0);

	return ret;
}

static inline int telemetry_plt_config_pss_event(u32 evt_id, int index)
{
	u32 write_buf;
	int ret;

	write_buf = evt_id | TELEM_EVENT_ENABLE;
	ret = intel_punit_ipc_command(IPC_PUNIT_BIOS_WRITE_TELE_EVENT,
				      index, 0, &write_buf, NULL);

	return ret;
}

static int telemetry_setup_iossevtconfig(struct telemetry_evtconfig evtconfig,
					 enum telemetry_action action)
{
	u8 num_ioss_evts, ioss_period;
	int ret, index, idx;
	u32 *ioss_evtmap;
	u32 telem_ctrl;

	num_ioss_evts = evtconfig.num_evts;
	ioss_period = evtconfig.period;
	ioss_evtmap = evtconfig.evtmap;

	/* Get telemetry EVENT CTL */
	ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
				    IOSS_TELEM_EVENT_CTL_READ, NULL, 0,
				    &telem_ctrl, IOSS_TELEM_READ_WORD);
	if (ret) {
		pr_err("IOSS TELEM_CTRL Read Failed\n");
		return ret;
	}

	/* Disable Telemetry */
	TELEM_DISABLE(telem_ctrl);

	ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
				    IOSS_TELEM_EVENT_CTL_WRITE,
				    (u8 *)&telem_ctrl,
				    IOSS_TELEM_EVT_CTRL_WRITE_SIZE,
				    NULL, 0);
	if (ret) {
		pr_err("IOSS TELEM_CTRL Event Disable Write Failed\n");
		return ret;
	}


	/* Reset Everything */
	if (action == TELEM_RESET) {
		/* Clear All Events */
		TELEM_CLEAR_EVENTS(telem_ctrl);

		ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
					    IOSS_TELEM_EVENT_CTL_WRITE,
					    (u8 *)&telem_ctrl,
					    IOSS_TELEM_EVT_CTRL_WRITE_SIZE,
					    NULL, 0);
		if (ret) {
			pr_err("IOSS TELEM_CTRL Event Disable Write Failed\n");
			return ret;
		}
		telm_conf->ioss_config.ssram_evts_used = 0;

		/* Configure Events */
		for (idx = 0; idx < num_ioss_evts; idx++) {
			if (telemetry_plt_config_ioss_event(
			    telm_conf->ioss_config.telem_evts[idx].evt_id,
			    idx)) {
				pr_err("IOSS TELEM_RESET Fail for data: %x\n",
				telm_conf->ioss_config.telem_evts[idx].evt_id);
				continue;
			}
			telm_conf->ioss_config.ssram_evts_used++;
		}
	}

	/* Re-Configure Everything */
	if (action == TELEM_UPDATE) {
		/* Clear All Events */
		TELEM_CLEAR_EVENTS(telem_ctrl);

		ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
					    IOSS_TELEM_EVENT_CTL_WRITE,
					    (u8 *)&telem_ctrl,
					    IOSS_TELEM_EVT_CTRL_WRITE_SIZE,
					    NULL, 0);
		if (ret) {
			pr_err("IOSS TELEM_CTRL Event Disable Write Failed\n");
			return ret;
		}
		telm_conf->ioss_config.ssram_evts_used = 0;

		/* Configure Events */
		for (index = 0; index < num_ioss_evts; index++) {
			telm_conf->ioss_config.telem_evts[index].evt_id =
			ioss_evtmap[index];

			if (telemetry_plt_config_ioss_event(
			    telm_conf->ioss_config.telem_evts[index].evt_id,
			    index)) {
				pr_err("IOSS TELEM_UPDATE Fail for Evt%x\n",
					ioss_evtmap[index]);
				continue;
			}
			telm_conf->ioss_config.ssram_evts_used++;
		}
	}

	/* Add some Events */
	if (action == TELEM_ADD) {
		/* Configure Events */
		for (index = telm_conf->ioss_config.ssram_evts_used, idx = 0;
		     idx < num_ioss_evts; index++, idx++) {
			telm_conf->ioss_config.telem_evts[index].evt_id =
			ioss_evtmap[idx];

			if (telemetry_plt_config_ioss_event(
			    telm_conf->ioss_config.telem_evts[index].evt_id,
			    index)) {
				pr_err("IOSS TELEM_ADD Fail for Event %x\n",
					ioss_evtmap[idx]);
				continue;
			}
			telm_conf->ioss_config.ssram_evts_used++;
		}
	}

	/* Enable Periodic Telemetry Events and enable SRAM trace */
	TELEM_CLEAR_SAMPLE_PERIOD(telem_ctrl);
	TELEM_ENABLE_SRAM_EVT_TRACE(telem_ctrl);
	TELEM_ENABLE_PERIODIC(telem_ctrl);
	telem_ctrl |= ioss_period;

	ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
				    IOSS_TELEM_EVENT_CTL_WRITE,
				    (u8 *)&telem_ctrl,
				    IOSS_TELEM_EVT_CTRL_WRITE_SIZE, NULL, 0);
	if (ret) {
		pr_err("IOSS TELEM_CTRL Event Enable Write Failed\n");
		return ret;
	}

	telm_conf->ioss_config.curr_period = ioss_period;

	return 0;
}


static int telemetry_setup_pssevtconfig(struct telemetry_evtconfig evtconfig,
					enum telemetry_action action)
{
	u8 num_pss_evts, pss_period;
	int ret, index, idx;
	u32 *pss_evtmap;
	u32 telem_ctrl;

	num_pss_evts = evtconfig.num_evts;
	pss_period = evtconfig.period;
	pss_evtmap = evtconfig.evtmap;

	/* PSS Config */
	/* Get telemetry EVENT CTL */
	ret = intel_punit_ipc_command(IPC_PUNIT_BIOS_READ_TELE_EVENT_CTRL,
				      0, 0, NULL, &telem_ctrl);
	if (ret) {
		pr_err("PSS TELEM_CTRL Read Failed\n");
		return ret;
	}

	/* Disable Telemetry */
	TELEM_DISABLE(telem_ctrl);
	ret = intel_punit_ipc_command(IPC_PUNIT_BIOS_WRITE_TELE_EVENT_CTRL,
				      0, 0, &telem_ctrl, NULL);
	if (ret) {
		pr_err("PSS TELEM_CTRL Event Disable Write Failed\n");
		return ret;
	}

	/* Reset Everything */
	if (action == TELEM_RESET) {
		/* Clear All Events */
		TELEM_CLEAR_EVENTS(telem_ctrl);

		ret = intel_punit_ipc_command(
				IPC_PUNIT_BIOS_WRITE_TELE_EVENT_CTRL,
				0, 0, &telem_ctrl, NULL);
		if (ret) {
			pr_err("PSS TELEM_CTRL Event Disable Write Failed\n");
			return ret;
		}
		telm_conf->pss_config.ssram_evts_used = 0;
		/* Configure Events */
		for (idx = 0; idx < num_pss_evts; idx++) {
			if (telemetry_plt_config_pss_event(
			    telm_conf->pss_config.telem_evts[idx].evt_id,
			    idx)) {
				pr_err("PSS TELEM_RESET Fail for Event %x\n",
				telm_conf->pss_config.telem_evts[idx].evt_id);
				continue;
			}
			telm_conf->pss_config.ssram_evts_used++;
		}
	}

	/* Re-Configure Everything */
	if (action == TELEM_UPDATE) {
		/* Clear All Events */
		TELEM_CLEAR_EVENTS(telem_ctrl);

		ret = intel_punit_ipc_command(
				IPC_PUNIT_BIOS_WRITE_TELE_EVENT_CTRL,
				0, 0, &telem_ctrl, NULL);
		if (ret) {
			pr_err("PSS TELEM_CTRL Event Disable Write Failed\n");
			return ret;
		}
		telm_conf->pss_config.ssram_evts_used = 0;

		/* Configure Events */
		for (index = 0; index < num_pss_evts; index++) {
			telm_conf->pss_config.telem_evts[index].evt_id =
			pss_evtmap[index];

			if (telemetry_plt_config_pss_event(
			    telm_conf->pss_config.telem_evts[index].evt_id,
			    index)) {
				pr_err("PSS TELEM_UPDATE Fail for Event %x\n",
					pss_evtmap[index]);
				continue;
			}
			telm_conf->pss_config.ssram_evts_used++;
		}
	}

	/* Add some Events */
	if (action == TELEM_ADD) {
		/* Configure Events */
		for (index = telm_conf->pss_config.ssram_evts_used, idx = 0;
		     idx < num_pss_evts; index++, idx++) {

			telm_conf->pss_config.telem_evts[index].evt_id =
			pss_evtmap[idx];

			if (telemetry_plt_config_pss_event(
			    telm_conf->pss_config.telem_evts[index].evt_id,
			    index)) {
				pr_err("PSS TELEM_ADD Fail for Event %x\n",
					pss_evtmap[idx]);
				continue;
			}
			telm_conf->pss_config.ssram_evts_used++;
		}
	}

	/* Enable Periodic Telemetry Events and enable SRAM trace */
	TELEM_CLEAR_SAMPLE_PERIOD(telem_ctrl);
	TELEM_ENABLE_SRAM_EVT_TRACE(telem_ctrl);
	TELEM_ENABLE_PERIODIC(telem_ctrl);
	telem_ctrl |= pss_period;

	ret = intel_punit_ipc_command(IPC_PUNIT_BIOS_WRITE_TELE_EVENT_CTRL,
				      0, 0, &telem_ctrl, NULL);
	if (ret) {
		pr_err("PSS TELEM_CTRL Event Enable Write Failed\n");
		return ret;
	}

	telm_conf->pss_config.curr_period = pss_period;

	return 0;
}

static int telemetry_setup_evtconfig(struct telemetry_evtconfig pss_evtconfig,
				     struct telemetry_evtconfig ioss_evtconfig,
				     enum telemetry_action action)
{
	int ret;

	mutex_lock(&(telm_conf->telem_lock));

	if ((action == TELEM_UPDATE) && (telm_conf->telem_in_use)) {
		ret = -EBUSY;
		goto out;
	}

	ret = telemetry_check_evtid(TELEM_PSS, pss_evtconfig.evtmap,
				    pss_evtconfig.num_evts, action);
	if (ret)
		goto out;

	ret = telemetry_check_evtid(TELEM_IOSS, ioss_evtconfig.evtmap,
				    ioss_evtconfig.num_evts, action);
	if (ret)
		goto out;

	if (ioss_evtconfig.num_evts) {
		ret = telemetry_setup_iossevtconfig(ioss_evtconfig, action);
		if (ret)
			goto out;
	}

	if (pss_evtconfig.num_evts) {
		ret = telemetry_setup_pssevtconfig(pss_evtconfig, action);
		if (ret)
			goto out;
	}

	if ((action == TELEM_UPDATE) || (action == TELEM_ADD))
		telm_conf->telem_in_use = true;
	else
		telm_conf->telem_in_use = false;

out:
	mutex_unlock(&(telm_conf->telem_lock));
	return ret;
}

static int telemetry_setup(struct platform_device *pdev)
{
	struct telemetry_evtconfig pss_evtconfig, ioss_evtconfig;
	u32 read_buf, events, event_regs;
	int ret;

	ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY, IOSS_TELEM_INFO_READ,
				    NULL, 0, &read_buf, IOSS_TELEM_READ_WORD);
	if (ret) {
		dev_err(&pdev->dev, "IOSS TELEM_INFO Read Failed\n");
		return ret;
	}

	/* Get telemetry Info */
	events = (read_buf & TELEM_INFO_SRAMEVTS_MASK) >>
		  TELEM_INFO_SRAMEVTS_SHIFT;
	event_regs = read_buf & TELEM_INFO_NENABLES_MASK;
	if ((events < TELEM_MAX_EVENTS_SRAM) ||
	    (event_regs < TELEM_MAX_EVENTS_SRAM)) {
		dev_err(&pdev->dev, "IOSS:Insufficient Space for SRAM Trace\n");
		dev_err(&pdev->dev, "SRAM Events %d; Event Regs %d\n",
			events, event_regs);
		return -ENOMEM;
	}

	telm_conf->ioss_config.min_period = TELEM_MIN_PERIOD(read_buf);
	telm_conf->ioss_config.max_period = TELEM_MAX_PERIOD(read_buf);

	/* PUNIT Mailbox Setup */
	ret = intel_punit_ipc_command(IPC_PUNIT_BIOS_READ_TELE_INFO, 0, 0,
				      NULL, &read_buf);
	if (ret) {
		dev_err(&pdev->dev, "PSS TELEM_INFO Read Failed\n");
		return ret;
	}

	/* Get telemetry Info */
	events = (read_buf & TELEM_INFO_SRAMEVTS_MASK) >>
		  TELEM_INFO_SRAMEVTS_SHIFT;
	event_regs = read_buf & TELEM_INFO_SRAMEVTS_MASK;
	if ((events < TELEM_MAX_EVENTS_SRAM) ||
	    (event_regs < TELEM_MAX_EVENTS_SRAM)) {
		dev_err(&pdev->dev, "PSS:Insufficient Space for SRAM Trace\n");
		dev_err(&pdev->dev, "SRAM Events %d; Event Regs %d\n",
			events, event_regs);
		return -ENOMEM;
	}

	telm_conf->pss_config.min_period = TELEM_MIN_PERIOD(read_buf);
	telm_conf->pss_config.max_period = TELEM_MAX_PERIOD(read_buf);

	pss_evtconfig.evtmap = NULL;
	pss_evtconfig.num_evts = TELEM_MAX_OS_ALLOCATED_EVENTS;
	pss_evtconfig.period = TELEM_SAMPLING_DEFAULT_PERIOD;

	ioss_evtconfig.evtmap = NULL;
	ioss_evtconfig.num_evts = TELEM_MAX_OS_ALLOCATED_EVENTS;
	ioss_evtconfig.period = TELEM_SAMPLING_DEFAULT_PERIOD;

	ret = telemetry_setup_evtconfig(pss_evtconfig, ioss_evtconfig,
					TELEM_RESET);
	if (ret) {
		dev_err(&pdev->dev, "TELEMTRY Setup Failed\n");
		return ret;
	}
	return 0;
}

static int telemetry_plt_update_events(struct telemetry_evtconfig pss_evtconfig,
				struct telemetry_evtconfig ioss_evtconfig)
{
	int ret;

	if ((pss_evtconfig.num_evts > 0) &&
	    (TELEM_SAMPLE_PERIOD_INVALID(pss_evtconfig.period))) {
		pr_err("PSS Sampling Period Out of Range\n");
		return -EINVAL;
	}

	if ((ioss_evtconfig.num_evts > 0) &&
	    (TELEM_SAMPLE_PERIOD_INVALID(ioss_evtconfig.period))) {
		pr_err("IOSS Sampling Period Out of Range\n");
		return -EINVAL;
	}

	ret = telemetry_setup_evtconfig(pss_evtconfig, ioss_evtconfig,
					TELEM_UPDATE);
	if (ret)
		pr_err("TELEMTRY Config Failed\n");

	return ret;
}


static int telemetry_plt_set_sampling_period(u8 pss_period, u8 ioss_period)
{
	u32 telem_ctrl = 0;
	int ret = 0;

	mutex_lock(&(telm_conf->telem_lock));
	if (ioss_period) {
		if (TELEM_SAMPLE_PERIOD_INVALID(ioss_period)) {
			pr_err("IOSS Sampling Period Out of Range\n");
			ret = -EINVAL;
			goto out;
		}

		/* Get telemetry EVENT CTL */
		ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
					    IOSS_TELEM_EVENT_CTL_READ, NULL, 0,
					    &telem_ctrl, IOSS_TELEM_READ_WORD);
		if (ret) {
			pr_err("IOSS TELEM_CTRL Read Failed\n");
			goto out;
		}

		/* Disable Telemetry */
		TELEM_DISABLE(telem_ctrl);

		ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
					    IOSS_TELEM_EVENT_CTL_WRITE,
					    (u8 *)&telem_ctrl,
					    IOSS_TELEM_EVT_CTRL_WRITE_SIZE,
					    NULL, 0);
		if (ret) {
			pr_err("IOSS TELEM_CTRL Event Disable Write Failed\n");
			goto out;
		}

		/* Enable Periodic Telemetry Events and enable SRAM trace */
		TELEM_CLEAR_SAMPLE_PERIOD(telem_ctrl);
		TELEM_ENABLE_SRAM_EVT_TRACE(telem_ctrl);
		TELEM_ENABLE_PERIODIC(telem_ctrl);
		telem_ctrl |= ioss_period;

		ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
					    IOSS_TELEM_EVENT_CTL_WRITE,
					    (u8 *)&telem_ctrl,
					    IOSS_TELEM_EVT_CTRL_WRITE_SIZE,
					    NULL, 0);
		if (ret) {
			pr_err("IOSS TELEM_CTRL Event Enable Write Failed\n");
			goto out;
		}
		telm_conf->ioss_config.curr_period = ioss_period;
	}

	if (pss_period) {
		if (TELEM_SAMPLE_PERIOD_INVALID(pss_period)) {
			pr_err("PSS Sampling Period Out of Range\n");
			ret = -EINVAL;
			goto out;
		}

		/* Get telemetry EVENT CTL */
		ret = intel_punit_ipc_command(
				IPC_PUNIT_BIOS_READ_TELE_EVENT_CTRL,
				0, 0, NULL, &telem_ctrl);
		if (ret) {
			pr_err("PSS TELEM_CTRL Read Failed\n");
			goto out;
		}

		/* Disable Telemetry */
		TELEM_DISABLE(telem_ctrl);
		ret = intel_punit_ipc_command(
				IPC_PUNIT_BIOS_WRITE_TELE_EVENT_CTRL,
				0, 0, &telem_ctrl, NULL);
		if (ret) {
			pr_err("PSS TELEM_CTRL Event Disable Write Failed\n");
			goto out;
		}

		/* Enable Periodic Telemetry Events and enable SRAM trace */
		TELEM_CLEAR_SAMPLE_PERIOD(telem_ctrl);
		TELEM_ENABLE_SRAM_EVT_TRACE(telem_ctrl);
		TELEM_ENABLE_PERIODIC(telem_ctrl);
		telem_ctrl |= pss_period;

		ret = intel_punit_ipc_command(
				IPC_PUNIT_BIOS_WRITE_TELE_EVENT_CTRL,
				0, 0, &telem_ctrl, NULL);
		if (ret) {
			pr_err("PSS TELEM_CTRL Event Enable Write Failed\n");
			goto out;
		}
		telm_conf->pss_config.curr_period = pss_period;
	}

out:
	mutex_unlock(&(telm_conf->telem_lock));
	return ret;
}


static int telemetry_plt_get_sampling_period(u8 *pss_min_period,
					     u8 *pss_max_period,
					     u8 *ioss_min_period,
					     u8 *ioss_max_period)
{
	*pss_min_period = telm_conf->pss_config.min_period;
	*pss_max_period = telm_conf->pss_config.max_period;
	*ioss_min_period = telm_conf->ioss_config.min_period;
	*ioss_max_period = telm_conf->ioss_config.max_period;

	return 0;
}


static int telemetry_plt_reset_events(void)
{
	struct telemetry_evtconfig pss_evtconfig, ioss_evtconfig;
	int ret;

	pss_evtconfig.evtmap = NULL;
	pss_evtconfig.num_evts = TELEM_MAX_OS_ALLOCATED_EVENTS;
	pss_evtconfig.period = TELEM_SAMPLING_DEFAULT_PERIOD;

	ioss_evtconfig.evtmap = NULL;
	ioss_evtconfig.num_evts = TELEM_MAX_OS_ALLOCATED_EVENTS;
	ioss_evtconfig.period = TELEM_SAMPLING_DEFAULT_PERIOD;

	ret = telemetry_setup_evtconfig(pss_evtconfig, ioss_evtconfig,
					TELEM_RESET);
	if (ret)
		pr_err("TELEMTRY Reset Failed\n");

	return ret;
}


static int telemetry_plt_get_eventconfig(struct telemetry_evtconfig *pss_config,
					struct telemetry_evtconfig *ioss_config,
					int pss_len, int ioss_len)
{
	u32 *pss_evtmap, *ioss_evtmap;
	u32 index;

	pss_evtmap = pss_config->evtmap;
	ioss_evtmap = ioss_config->evtmap;

	mutex_lock(&(telm_conf->telem_lock));
	pss_config->num_evts = telm_conf->pss_config.ssram_evts_used;
	ioss_config->num_evts = telm_conf->ioss_config.ssram_evts_used;

	pss_config->period = telm_conf->pss_config.curr_period;
	ioss_config->period = telm_conf->ioss_config.curr_period;

	if ((pss_len < telm_conf->pss_config.ssram_evts_used) ||
	    (ioss_len < telm_conf->ioss_config.ssram_evts_used)) {
		mutex_unlock(&(telm_conf->telem_lock));
		return -EINVAL;
	}

	for (index = 0; index < telm_conf->pss_config.ssram_evts_used;
	     index++) {
		pss_evtmap[index] =
		telm_conf->pss_config.telem_evts[index].evt_id;
	}

	for (index = 0; index < telm_conf->ioss_config.ssram_evts_used;
	     index++) {
		ioss_evtmap[index] =
		telm_conf->ioss_config.telem_evts[index].evt_id;
	}

	mutex_unlock(&(telm_conf->telem_lock));
	return 0;
}


static int telemetry_plt_add_events(u8 num_pss_evts, u8 num_ioss_evts,
				    u32 *pss_evtmap, u32 *ioss_evtmap)
{
	struct telemetry_evtconfig pss_evtconfig, ioss_evtconfig;
	int ret;

	pss_evtconfig.evtmap = pss_evtmap;
	pss_evtconfig.num_evts = num_pss_evts;
	pss_evtconfig.period = telm_conf->pss_config.curr_period;

	ioss_evtconfig.evtmap = ioss_evtmap;
	ioss_evtconfig.num_evts = num_ioss_evts;
	ioss_evtconfig.period = telm_conf->ioss_config.curr_period;

	ret = telemetry_setup_evtconfig(pss_evtconfig, ioss_evtconfig,
					TELEM_ADD);
	if (ret)
		pr_err("TELEMTRY ADD Failed\n");

	return ret;
}

static int telem_evtlog_read(enum telemetry_unit telem_unit,
			     struct telem_ssram_region *ssram_region, u8 len)
{
	struct telemetry_unit_config *unit_config;
	u64 timestamp_prev, timestamp_next;
	int ret, index, timeout = 0;

	ret = telem_get_unitconfig(telem_unit, &unit_config);
	if (ret < 0)
		return ret;

	if (len > unit_config->ssram_evts_used)
		len = unit_config->ssram_evts_used;

	do {
		timestamp_prev = readq(unit_config->regmap);
		if (!timestamp_prev) {
			pr_err("Ssram under update. Please Try Later\n");
			return -EBUSY;
		}

		ssram_region->start_time = readq(unit_config->regmap +
						 TELEM_SSRAM_STARTTIME_OFFSET);

		for (index = 0; index < len; index++) {
			ssram_region->events[index] =
			readq(unit_config->regmap + TELEM_SSRAM_EVTLOG_OFFSET +
			      BYTES_PER_LONG*index);
		}

		timestamp_next = readq(unit_config->regmap);
		if (!timestamp_next) {
			pr_err("Ssram under update. Please Try Later\n");
			return -EBUSY;
		}

		if (timeout++ > TELEM_SSRAM_READ_TIMEOUT) {
			pr_err("Timeout while reading Events\n");
			return -EBUSY;
		}

	} while (timestamp_prev != timestamp_next);

	ssram_region->timestamp = timestamp_next;

	return len;
}

static int telemetry_plt_raw_read_eventlog(enum telemetry_unit telem_unit,
					   struct telemetry_evtlog *evtlog,
					   int len, int log_all_evts)
{
	int index, idx1, ret, readlen = len;
	struct telem_ssram_region ssram_region;
	struct telemetry_evtmap *evtmap;

	switch (telem_unit)	{
	case TELEM_PSS:
		evtmap = telm_conf->pss_config.telem_evts;
		break;

	case TELEM_IOSS:
		evtmap = telm_conf->ioss_config.telem_evts;
		break;

	default:
		pr_err("Unknown Telemetry Unit Specified %d\n", telem_unit);
		return -EINVAL;
	}

	if (!log_all_evts)
		readlen = TELEM_MAX_EVENTS_SRAM;

	ret = telem_evtlog_read(telem_unit, &ssram_region, readlen);
	if (ret < 0)
		return ret;

	/* Invalid evt-id array specified via length mismatch */
	if ((!log_all_evts) && (len > ret))
		return -EINVAL;

	if (log_all_evts)
		for (index = 0; index < ret; index++) {
			evtlog[index].telem_evtlog = ssram_region.events[index];
			evtlog[index].telem_evtid = evtmap[index].evt_id;
		}
	else
		for (index = 0, readlen = 0; (index < ret) && (readlen < len);
		     index++) {
			for (idx1 = 0; idx1 < len; idx1++) {
				/* Elements matched */
				if (evtmap[index].evt_id ==
				    evtlog[idx1].telem_evtid) {
					evtlog[idx1].telem_evtlog =
					ssram_region.events[index];
					readlen++;

					break;
				}
			}
		}

	return readlen;
}

static int telemetry_plt_read_eventlog(enum telemetry_unit telem_unit,
		struct telemetry_evtlog *evtlog, int len, int log_all_evts)
{
	int ret;

	mutex_lock(&(telm_conf->telem_lock));
	ret = telemetry_plt_raw_read_eventlog(telem_unit, evtlog,
					      len, log_all_evts);
	mutex_unlock(&(telm_conf->telem_lock));

	return ret;
}

static int telemetry_plt_get_trace_verbosity(enum telemetry_unit telem_unit,
					     u32 *verbosity)
{
	u32 temp = 0;
	int ret;

	if (verbosity == NULL)
		return -EINVAL;

	mutex_lock(&(telm_conf->telem_trace_lock));
	switch (telem_unit) {
	case TELEM_PSS:
		ret = intel_punit_ipc_command(
				IPC_PUNIT_BIOS_READ_TELE_TRACE_CTRL,
				0, 0, NULL, &temp);
		if (ret) {
			pr_err("PSS TRACE_CTRL Read Failed\n");
			goto out;
		}

		break;

	case TELEM_IOSS:
		ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
				IOSS_TELEM_TRACE_CTL_READ, NULL, 0, &temp,
				IOSS_TELEM_READ_WORD);
		if (ret) {
			pr_err("IOSS TRACE_CTL Read Failed\n");
			goto out;
		}

		break;

	default:
		pr_err("Unknown Telemetry Unit Specified %d\n", telem_unit);
		ret = -EINVAL;
		break;
	}
	TELEM_EXTRACT_VERBOSITY(temp, *verbosity);

out:
	mutex_unlock(&(telm_conf->telem_trace_lock));
	return ret;
}

static int telemetry_plt_set_trace_verbosity(enum telemetry_unit telem_unit,
					     u32 verbosity)
{
	u32 temp = 0;
	int ret;

	verbosity &= TELEM_TRC_VERBOSITY_MASK;

	mutex_lock(&(telm_conf->telem_trace_lock));
	switch (telem_unit) {
	case TELEM_PSS:
		ret = intel_punit_ipc_command(
				IPC_PUNIT_BIOS_READ_TELE_TRACE_CTRL,
				0, 0, NULL, &temp);
		if (ret) {
			pr_err("PSS TRACE_CTRL Read Failed\n");
			goto out;
		}

		TELEM_CLEAR_VERBOSITY_BITS(temp);
		TELEM_SET_VERBOSITY_BITS(temp, verbosity);

		ret = intel_punit_ipc_command(
				IPC_PUNIT_BIOS_WRITE_TELE_TRACE_CTRL,
				0, 0, &temp, NULL);
		if (ret) {
			pr_err("PSS TRACE_CTRL Verbosity Set Failed\n");
			goto out;
		}
		break;

	case TELEM_IOSS:
		ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
				IOSS_TELEM_TRACE_CTL_READ, NULL, 0, &temp,
				IOSS_TELEM_READ_WORD);
		if (ret) {
			pr_err("IOSS TRACE_CTL Read Failed\n");
			goto out;
		}

		TELEM_CLEAR_VERBOSITY_BITS(temp);
		TELEM_SET_VERBOSITY_BITS(temp, verbosity);

		ret = intel_pmc_ipc_command(PMC_IPC_PMC_TELEMTRY,
				IOSS_TELEM_TRACE_CTL_WRITE, (u8 *)&temp,
				IOSS_TELEM_WRITE_FOURBYTES, NULL, 0);
		if (ret) {
			pr_err("IOSS TRACE_CTL Verbosity Set Failed\n");
			goto out;
		}
		break;

	default:
		pr_err("Unknown Telemetry Unit Specified %d\n", telem_unit);
		ret = -EINVAL;
		break;
	}

out:
	mutex_unlock(&(telm_conf->telem_trace_lock));
	return ret;
}

static const struct telemetry_core_ops telm_pltops = {
	.get_trace_verbosity = telemetry_plt_get_trace_verbosity,
	.set_trace_verbosity = telemetry_plt_set_trace_verbosity,
	.set_sampling_period = telemetry_plt_set_sampling_period,
	.get_sampling_period = telemetry_plt_get_sampling_period,
	.raw_read_eventlog = telemetry_plt_raw_read_eventlog,
	.get_eventconfig = telemetry_plt_get_eventconfig,
	.update_events = telemetry_plt_update_events,
	.read_eventlog = telemetry_plt_read_eventlog,
	.reset_events = telemetry_plt_reset_events,
	.add_events = telemetry_plt_add_events,
};

static int telemetry_pltdrv_probe(struct platform_device *pdev)
{
	struct resource *res0 = NULL, *res1 = NULL;
	const struct x86_cpu_id *id;
	int size, ret = -ENOMEM;

	id = x86_match_cpu(telemetry_cpu_ids);
	if (!id)
		return -ENODEV;

	telm_conf = (struct telemetry_plt_config *)id->driver_data;

	res0 = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res0) {
		ret = -EINVAL;
		goto out;
	}
	size = resource_size(res0);
	if (!devm_request_mem_region(&pdev->dev, res0->start, size,
				     pdev->name)) {
		ret = -EBUSY;
		goto out;
	}
	telm_conf->pss_config.ssram_base_addr = res0->start;
	telm_conf->pss_config.ssram_size = size;

	res1 = platform_get_resource(pdev, IORESOURCE_MEM, 1);
	if (!res1) {
		ret = -EINVAL;
		goto out;
	}
	size = resource_size(res1);
	if (!devm_request_mem_region(&pdev->dev, res1->start, size,
				     pdev->name)) {
		ret = -EBUSY;
		goto out;
	}

	telm_conf->ioss_config.ssram_base_addr = res1->start;
	telm_conf->ioss_config.ssram_size = size;

	telm_conf->pss_config.regmap = ioremap_nocache(
					telm_conf->pss_config.ssram_base_addr,
					telm_conf->pss_config.ssram_size);
	if (!telm_conf->pss_config.regmap) {
		ret = -ENOMEM;
		goto out;
	}

	telm_conf->ioss_config.regmap = ioremap_nocache(
				telm_conf->ioss_config.ssram_base_addr,
				telm_conf->ioss_config.ssram_size);
	if (!telm_conf->ioss_config.regmap) {
		ret = -ENOMEM;
		goto out;
	}

	mutex_init(&telm_conf->telem_lock);
	mutex_init(&telm_conf->telem_trace_lock);

	ret = telemetry_setup(pdev);
	if (ret)
		goto out;

	ret = telemetry_set_pltdata(&telm_pltops, telm_conf);
	if (ret) {
		dev_err(&pdev->dev, "TELEMTRY Set Pltops Failed.\n");
		goto out;
	}

	return 0;

out:
	if (res0)
		release_mem_region(res0->start, resource_size(res0));
	if (res1)
		release_mem_region(res1->start, resource_size(res1));
	if (telm_conf->pss_config.regmap)
		iounmap(telm_conf->pss_config.regmap);
	if (telm_conf->ioss_config.regmap)
		iounmap(telm_conf->ioss_config.regmap);
	dev_err(&pdev->dev, "TELEMTRY Setup Failed.\n");

	return ret;
}

static int telemetry_pltdrv_remove(struct platform_device *pdev)
{
	telemetry_clear_pltdata();
	iounmap(telm_conf->pss_config.regmap);
	iounmap(telm_conf->ioss_config.regmap);

	return 0;
}

static struct platform_driver telemetry_soc_driver = {
	.probe		= telemetry_pltdrv_probe,
	.remove		= telemetry_pltdrv_remove,
	.driver		= {
		.name	= DRIVER_NAME,
	},
};

static int __init telemetry_module_init(void)
{
	pr_info(DRIVER_NAME ": version %s loaded\n", DRIVER_VERSION);
	return platform_driver_register(&telemetry_soc_driver);
}

static void __exit telemetry_module_exit(void)
{
	platform_driver_unregister(&telemetry_soc_driver);
}

device_initcall(telemetry_module_init);
module_exit(telemetry_module_exit);

MODULE_AUTHOR("Souvik Kumar Chakravarty <souvik.k.chakravarty@intel.com>");
MODULE_DESCRIPTION("Intel SoC Telemetry Platform Driver");
MODULE_VERSION(DRIVER_VERSION);
MODULE_LICENSE("GPL");