Training courses

Kernel and Embedded Linux

Bootlin training courses

Embedded Linux, kernel,
Yocto Project, Buildroot, real-time,
graphics, boot time, debugging...

Bootlin logo

Elixir Cross Referencer

   1
   2
   3
   4
   5
   6
   7
   8
   9
  10
  11
  12
  13
  14
  15
  16
  17
  18
  19
  20
  21
  22
  23
  24
  25
  26
  27
  28
  29
  30
  31
  32
  33
  34
  35
  36
  37
  38
  39
  40
  41
  42
  43
  44
  45
  46
  47
  48
  49
  50
  51
  52
  53
  54
  55
  56
  57
  58
  59
  60
  61
  62
  63
  64
  65
  66
  67
  68
  69
  70
  71
  72
  73
  74
  75
  76
  77
  78
  79
  80
  81
  82
  83
  84
  85
  86
  87
  88
  89
  90
  91
  92
  93
  94
  95
  96
  97
  98
  99
 100
 101
 102
 103
 104
 105
 106
 107
 108
 109
 110
 111
 112
 113
 114
 115
 116
 117
 118
 119
 120
 121
 122
 123
 124
 125
 126
 127
 128
 129
 130
 131
 132
 133
 134
 135
 136
 137
 138
 139
 140
 141
 142
 143
 144
 145
 146
 147
 148
 149
 150
 151
 152
 153
 154
 155
 156
 157
 158
 159
 160
 161
 162
 163
 164
 165
 166
 167
 168
 169
 170
 171
 172
 173
 174
 175
 176
 177
 178
 179
 180
 181
 182
 183
 184
 185
 186
 187
 188
 189
 190
 191
 192
 193
 194
 195
 196
 197
 198
 199
 200
 201
 202
 203
 204
 205
 206
 207
 208
 209
 210
 211
 212
 213
 214
 215
 216
 217
 218
 219
 220
 221
 222
 223
 224
 225
 226
 227
 228
 229
 230
 231
 232
 233
 234
 235
 236
 237
 238
 239
 240
 241
 242
 243
 244
 245
 246
 247
 248
 249
 250
 251
 252
 253
 254
 255
 256
 257
 258
 259
 260
 261
 262
 263
 264
 265
 266
 267
 268
 269
 270
 271
 272
 273
 274
 275
 276
 277
 278
 279
 280
 281
 282
 283
 284
 285
 286
 287
 288
 289
 290
 291
 292
 293
 294
 295
 296
 297
 298
 299
 300
 301
 302
 303
 304
 305
 306
 307
 308
 309
 310
 311
 312
 313
 314
 315
 316
 317
 318
 319
 320
 321
 322
 323
 324
 325
 326
 327
 328
 329
 330
 331
 332
 333
 334
 335
 336
 337
 338
 339
 340
 341
 342
 343
 344
 345
 346
 347
 348
 349
 350
 351
 352
 353
 354
 355
 356
 357
 358
 359
 360
 361
 362
 363
 364
 365
 366
 367
 368
 369
 370
 371
 372
 373
 374
 375
 376
 377
 378
 379
 380
 381
 382
 383
 384
 385
 386
 387
 388
 389
 390
 391
 392
 393
 394
 395
 396
 397
 398
 399
 400
 401
 402
 403
 404
 405
 406
 407
 408
 409
 410
 411
 412
 413
 414
 415
 416
 417
 418
 419
 420
 421
 422
 423
 424
 425
 426
 427
 428
 429
 430
 431
 432
 433
 434
 435
 436
 437
 438
 439
 440
 441
 442
 443
 444
 445
 446
 447
 448
 449
 450
 451
 452
 453
 454
 455
 456
 457
 458
 459
 460
 461
 462
 463
 464
 465
 466
 467
 468
 469
 470
 471
 472
 473
 474
 475
 476
 477
 478
 479
 480
 481
 482
 483
 484
 485
 486
 487
 488
 489
 490
 491
 492
 493
 494
 495
 496
 497
 498
 499
 500
 501
 502
 503
 504
 505
 506
 507
 508
 509
 510
 511
 512
 513
 514
 515
 516
 517
 518
 519
 520
 521
 522
 523
 524
 525
 526
 527
 528
 529
 530
 531
 532
 533
 534
 535
 536
 537
 538
 539
 540
 541
 542
 543
 544
 545
 546
 547
 548
 549
 550
 551
 552
 553
 554
 555
 556
 557
 558
 559
 560
 561
 562
 563
 564
 565
 566
 567
 568
 569
 570
 571
 572
 573
 574
 575
 576
 577
 578
 579
 580
 581
 582
 583
 584
 585
 586
 587
 588
 589
 590
 591
 592
 593
 594
 595
 596
 597
 598
 599
 600
 601
 602
 603
 604
 605
 606
 607
 608
 609
 610
 611
 612
 613
 614
 615
 616
 617
 618
 619
 620
 621
 622
 623
 624
 625
 626
 627
 628
 629
 630
 631
 632
 633
 634
 635
 636
 637
 638
 639
 640
 641
 642
 643
 644
 645
 646
 647
 648
 649
 650
 651
 652
 653
 654
 655
 656
 657
 658
 659
 660
 661
 662
 663
 664
 665
 666
 667
 668
 669
 670
 671
 672
 673
 674
 675
 676
 677
 678
 679
 680
 681
 682
 683
 684
 685
 686
 687
 688
 689
 690
 691
 692
 693
 694
 695
 696
 697
 698
 699
 700
 701
 702
 703
 704
 705
 706
 707
 708
 709
 710
 711
 712
 713
 714
 715
 716
 717
 718
 719
 720
 721
 722
 723
 724
 725
 726
 727
 728
 729
 730
 731
 732
 733
 734
 735
 736
 737
 738
 739
 740
 741
 742
 743
 744
 745
 746
 747
 748
 749
 750
 751
 752
 753
 754
 755
 756
 757
 758
 759
 760
 761
 762
 763
 764
 765
 766
 767
 768
 769
 770
 771
 772
 773
 774
 775
 776
 777
 778
 779
 780
 781
 782
 783
 784
 785
 786
 787
 788
 789
 790
 791
 792
 793
 794
 795
 796
 797
 798
 799
 800
 801
 802
 803
 804
 805
 806
 807
 808
 809
 810
 811
 812
 813
 814
 815
 816
 817
 818
 819
 820
 821
 822
 823
 824
 825
 826
 827
 828
 829
 830
 831
 832
 833
 834
 835
 836
 837
 838
 839
 840
 841
 842
 843
 844
 845
 846
 847
 848
 849
 850
 851
 852
 853
 854
 855
 856
 857
 858
 859
 860
 861
 862
 863
 864
 865
 866
 867
 868
 869
 870
 871
 872
 873
 874
 875
 876
 877
 878
 879
 880
 881
 882
 883
 884
 885
 886
 887
 888
 889
 890
 891
 892
 893
 894
 895
 896
 897
 898
 899
 900
 901
 902
 903
 904
 905
 906
 907
 908
 909
 910
 911
 912
 913
 914
 915
 916
 917
 918
 919
 920
 921
 922
 923
 924
 925
 926
 927
 928
 929
 930
 931
 932
 933
 934
 935
 936
 937
 938
 939
 940
 941
 942
 943
 944
 945
 946
 947
 948
 949
 950
 951
 952
 953
 954
 955
 956
 957
 958
 959
 960
 961
 962
 963
 964
 965
 966
 967
 968
 969
 970
 971
 972
 973
 974
 975
 976
 977
 978
 979
 980
 981
 982
 983
 984
 985
 986
 987
 988
 989
 990
 991
 992
 993
 994
 995
 996
 997
 998
 999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
// SPDX-License-Identifier: GPL-2.0
// CCI Cache Coherent Interconnect PMU driver
// Copyright (C) 2013-2018 Arm Ltd.
// Author: Punit Agrawal <punit.agrawal@arm.com>, Suzuki Poulose <suzuki.poulose@arm.com>

#include <linux/arm-cci.h>
#include <linux/io.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/perf_event.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/spinlock.h>

#define DRIVER_NAME		"ARM-CCI PMU"

#define CCI_PMCR		0x0100
#define CCI_PID2		0x0fe8

#define CCI_PMCR_CEN		0x00000001
#define CCI_PMCR_NCNT_MASK	0x0000f800
#define CCI_PMCR_NCNT_SHIFT	11

#define CCI_PID2_REV_MASK	0xf0
#define CCI_PID2_REV_SHIFT	4

#define CCI_PMU_EVT_SEL		0x000
#define CCI_PMU_CNTR		0x004
#define CCI_PMU_CNTR_CTRL	0x008
#define CCI_PMU_OVRFLW		0x00c

#define CCI_PMU_OVRFLW_FLAG	1

#define CCI_PMU_CNTR_SIZE(model)	((model)->cntr_size)
#define CCI_PMU_CNTR_BASE(model, idx)	((idx) * CCI_PMU_CNTR_SIZE(model))
#define CCI_PMU_CNTR_MASK		((1ULL << 32) -1)
#define CCI_PMU_CNTR_LAST(cci_pmu)	(cci_pmu->num_cntrs - 1)

#define CCI_PMU_MAX_HW_CNTRS(model) \
	((model)->num_hw_cntrs + (model)->fixed_hw_cntrs)

/* Types of interfaces that can generate events */
enum {
	CCI_IF_SLAVE,
	CCI_IF_MASTER,
#ifdef CONFIG_ARM_CCI5xx_PMU
	CCI_IF_GLOBAL,
#endif
	CCI_IF_MAX,
};

#define NUM_HW_CNTRS_CII_4XX	4
#define NUM_HW_CNTRS_CII_5XX	8
#define NUM_HW_CNTRS_MAX	NUM_HW_CNTRS_CII_5XX

#define FIXED_HW_CNTRS_CII_4XX	1
#define FIXED_HW_CNTRS_CII_5XX	0
#define FIXED_HW_CNTRS_MAX	FIXED_HW_CNTRS_CII_4XX

#define HW_CNTRS_MAX		(NUM_HW_CNTRS_MAX + FIXED_HW_CNTRS_MAX)

struct event_range {
	u32 min;
	u32 max;
};

struct cci_pmu_hw_events {
	struct perf_event **events;
	unsigned long *used_mask;
	raw_spinlock_t pmu_lock;
};

struct cci_pmu;
/*
 * struct cci_pmu_model:
 * @fixed_hw_cntrs - Number of fixed event counters
 * @num_hw_cntrs - Maximum number of programmable event counters
 * @cntr_size - Size of an event counter mapping
 */
struct cci_pmu_model {
	char *name;
	u32 fixed_hw_cntrs;
	u32 num_hw_cntrs;
	u32 cntr_size;
	struct attribute **format_attrs;
	struct attribute **event_attrs;
	struct event_range event_ranges[CCI_IF_MAX];
	int (*validate_hw_event)(struct cci_pmu *, unsigned long);
	int (*get_event_idx)(struct cci_pmu *, struct cci_pmu_hw_events *, unsigned long);
	void (*write_counters)(struct cci_pmu *, unsigned long *);
};

static struct cci_pmu_model cci_pmu_models[];

struct cci_pmu {
	void __iomem *base;
	void __iomem *ctrl_base;
	struct pmu pmu;
	int cpu;
	int nr_irqs;
	int *irqs;
	unsigned long active_irqs;
	const struct cci_pmu_model *model;
	struct cci_pmu_hw_events hw_events;
	struct platform_device *plat_device;
	int num_cntrs;
	atomic_t active_events;
	struct mutex reserve_mutex;
};

#define to_cci_pmu(c)	(container_of(c, struct cci_pmu, pmu))

static struct cci_pmu *g_cci_pmu;

enum cci_models {
#ifdef CONFIG_ARM_CCI400_PMU
	CCI400_R0,
	CCI400_R1,
#endif
#ifdef CONFIG_ARM_CCI5xx_PMU
	CCI500_R0,
	CCI550_R0,
#endif
	CCI_MODEL_MAX
};

static void pmu_write_counters(struct cci_pmu *cci_pmu,
				 unsigned long *mask);
static ssize_t __maybe_unused cci_pmu_format_show(struct device *dev,
			struct device_attribute *attr, char *buf);
static ssize_t __maybe_unused cci_pmu_event_show(struct device *dev,
			struct device_attribute *attr, char *buf);

#define CCI_EXT_ATTR_ENTRY(_name, _func, _config) 				\
	&((struct dev_ext_attribute[]) {					\
		{ __ATTR(_name, S_IRUGO, _func, NULL), (void *)_config }	\
	})[0].attr.attr

#define CCI_FORMAT_EXT_ATTR_ENTRY(_name, _config) \
	CCI_EXT_ATTR_ENTRY(_name, cci_pmu_format_show, (char *)_config)
#define CCI_EVENT_EXT_ATTR_ENTRY(_name, _config) \
	CCI_EXT_ATTR_ENTRY(_name, cci_pmu_event_show, (unsigned long)_config)

/* CCI400 PMU Specific definitions */

#ifdef CONFIG_ARM_CCI400_PMU

/* Port ids */
#define CCI400_PORT_S0		0
#define CCI400_PORT_S1		1
#define CCI400_PORT_S2		2
#define CCI400_PORT_S3		3
#define CCI400_PORT_S4		4
#define CCI400_PORT_M0		5
#define CCI400_PORT_M1		6
#define CCI400_PORT_M2		7

#define CCI400_R1_PX		5

/*
 * Instead of an event id to monitor CCI cycles, a dedicated counter is
 * provided. Use 0xff to represent CCI cycles and hope that no future revisions
 * make use of this event in hardware.
 */
enum cci400_perf_events {
	CCI400_PMU_CYCLES = 0xff
};

#define CCI400_PMU_CYCLE_CNTR_IDX	0
#define CCI400_PMU_CNTR0_IDX		1

/*
 * CCI PMU event id is an 8-bit value made of two parts - bits 7:5 for one of 8
 * ports and bits 4:0 are event codes. There are different event codes
 * associated with each port type.
 *
 * Additionally, the range of events associated with the port types changed
 * between Rev0 and Rev1.
 *
 * The constants below define the range of valid codes for each port type for
 * the different revisions and are used to validate the event to be monitored.
 */

#define CCI400_PMU_EVENT_MASK		0xffUL
#define CCI400_PMU_EVENT_SOURCE_SHIFT	5
#define CCI400_PMU_EVENT_SOURCE_MASK	0x7
#define CCI400_PMU_EVENT_CODE_SHIFT	0
#define CCI400_PMU_EVENT_CODE_MASK	0x1f
#define CCI400_PMU_EVENT_SOURCE(event) \
	((event >> CCI400_PMU_EVENT_SOURCE_SHIFT) & \
			CCI400_PMU_EVENT_SOURCE_MASK)
#define CCI400_PMU_EVENT_CODE(event) \
	((event >> CCI400_PMU_EVENT_CODE_SHIFT) & CCI400_PMU_EVENT_CODE_MASK)

#define CCI400_R0_SLAVE_PORT_MIN_EV	0x00
#define CCI400_R0_SLAVE_PORT_MAX_EV	0x13
#define CCI400_R0_MASTER_PORT_MIN_EV	0x14
#define CCI400_R0_MASTER_PORT_MAX_EV	0x1a

#define CCI400_R1_SLAVE_PORT_MIN_EV	0x00
#define CCI400_R1_SLAVE_PORT_MAX_EV	0x14
#define CCI400_R1_MASTER_PORT_MIN_EV	0x00
#define CCI400_R1_MASTER_PORT_MAX_EV	0x11

#define CCI400_CYCLE_EVENT_EXT_ATTR_ENTRY(_name, _config) \
	CCI_EXT_ATTR_ENTRY(_name, cci400_pmu_cycle_event_show, \
					(unsigned long)_config)

static ssize_t cci400_pmu_cycle_event_show(struct device *dev,
			struct device_attribute *attr, char *buf);

static struct attribute *cci400_pmu_format_attrs[] = {
	CCI_FORMAT_EXT_ATTR_ENTRY(event, "config:0-4"),
	CCI_FORMAT_EXT_ATTR_ENTRY(source, "config:5-7"),
	NULL
};

static struct attribute *cci400_r0_pmu_event_attrs[] = {
	/* Slave events */
	CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_any, 0x0),
	CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_device, 0x01),
	CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_normal_or_nonshareable, 0x2),
	CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_inner_or_outershareable, 0x3),
	CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_cache_maintenance, 0x4),
	CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_mem_barrier, 0x5),
	CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_sync_barrier, 0x6),
	CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_dvm_msg, 0x7),
	CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_dvm_msg_sync, 0x8),
	CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_stall_tt_full, 0x9),
	CCI_EVENT_EXT_ATTR_ENTRY(si_r_data_last_hs_snoop, 0xA),
	CCI_EVENT_EXT_ATTR_ENTRY(si_r_data_stall_rvalids_h_rready_l, 0xB),
	CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_any, 0xC),
	CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_device, 0xD),
	CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_normal_or_nonshareable, 0xE),
	CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_inner_or_outershare_wback_wclean, 0xF),
	CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_write_unique, 0x10),
	CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_write_line_unique, 0x11),
	CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_evict, 0x12),
	CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_stall_tt_full, 0x13),
	/* Master events */
	CCI_EVENT_EXT_ATTR_ENTRY(mi_retry_speculative_fetch, 0x14),
	CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_addr_hazard, 0x15),
	CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_id_hazard, 0x16),
	CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_tt_full, 0x17),
	CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_barrier_hazard, 0x18),
	CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_barrier_hazard, 0x19),
	CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_tt_full, 0x1A),
	/* Special event for cycles counter */
	CCI400_CYCLE_EVENT_EXT_ATTR_ENTRY(cycles, 0xff),
	NULL
};

static struct attribute *cci400_r1_pmu_event_attrs[] = {
	/* Slave events */
	CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_any, 0x0),
	CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_device, 0x01),
	CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_normal_or_nonshareable, 0x2),
	CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_inner_or_outershareable, 0x3),
	CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_cache_maintenance, 0x4),
	CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_mem_barrier, 0x5),
	CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_sync_barrier, 0x6),
	CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_dvm_msg, 0x7),
	CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_dvm_msg_sync, 0x8),
	CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_stall_tt_full, 0x9),
	CCI_EVENT_EXT_ATTR_ENTRY(si_r_data_last_hs_snoop, 0xA),
	CCI_EVENT_EXT_ATTR_ENTRY(si_r_data_stall_rvalids_h_rready_l, 0xB),
	CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_any, 0xC),
	CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_device, 0xD),
	CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_normal_or_nonshareable, 0xE),
	CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_inner_or_outershare_wback_wclean, 0xF),
	CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_write_unique, 0x10),
	CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_write_line_unique, 0x11),
	CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_evict, 0x12),
	CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_stall_tt_full, 0x13),
	CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_stall_slave_id_hazard, 0x14),
	/* Master events */
	CCI_EVENT_EXT_ATTR_ENTRY(mi_retry_speculative_fetch, 0x0),
	CCI_EVENT_EXT_ATTR_ENTRY(mi_stall_cycle_addr_hazard, 0x1),
	CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_master_id_hazard, 0x2),
	CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_hi_prio_rtq_full, 0x3),
	CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_barrier_hazard, 0x4),
	CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_barrier_hazard, 0x5),
	CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_wtq_full, 0x6),
	CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_low_prio_rtq_full, 0x7),
	CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_mid_prio_rtq_full, 0x8),
	CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_qvn_vn0, 0x9),
	CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_qvn_vn1, 0xA),
	CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_qvn_vn2, 0xB),
	CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall_qvn_vn3, 0xC),
	CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_qvn_vn0, 0xD),
	CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_qvn_vn1, 0xE),
	CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_qvn_vn2, 0xF),
	CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall_qvn_vn3, 0x10),
	CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_unique_or_line_unique_addr_hazard, 0x11),
	/* Special event for cycles counter */
	CCI400_CYCLE_EVENT_EXT_ATTR_ENTRY(cycles, 0xff),
	NULL
};

static ssize_t cci400_pmu_cycle_event_show(struct device *dev,
			struct device_attribute *attr, char *buf)
{
	struct dev_ext_attribute *eattr = container_of(attr,
				struct dev_ext_attribute, attr);
	return snprintf(buf, PAGE_SIZE, "config=0x%lx\n", (unsigned long)eattr->var);
}

static int cci400_get_event_idx(struct cci_pmu *cci_pmu,
				struct cci_pmu_hw_events *hw,
				unsigned long cci_event)
{
	int idx;

	/* cycles event idx is fixed */
	if (cci_event == CCI400_PMU_CYCLES) {
		if (test_and_set_bit(CCI400_PMU_CYCLE_CNTR_IDX, hw->used_mask))
			return -EAGAIN;

		return CCI400_PMU_CYCLE_CNTR_IDX;
	}

	for (idx = CCI400_PMU_CNTR0_IDX; idx <= CCI_PMU_CNTR_LAST(cci_pmu); ++idx)
		if (!test_and_set_bit(idx, hw->used_mask))
			return idx;

	/* No counters available */
	return -EAGAIN;
}

static int cci400_validate_hw_event(struct cci_pmu *cci_pmu, unsigned long hw_event)
{
	u8 ev_source = CCI400_PMU_EVENT_SOURCE(hw_event);
	u8 ev_code = CCI400_PMU_EVENT_CODE(hw_event);
	int if_type;

	if (hw_event & ~CCI400_PMU_EVENT_MASK)
		return -ENOENT;

	if (hw_event == CCI400_PMU_CYCLES)
		return hw_event;

	switch (ev_source) {
	case CCI400_PORT_S0:
	case CCI400_PORT_S1:
	case CCI400_PORT_S2:
	case CCI400_PORT_S3:
	case CCI400_PORT_S4:
		/* Slave Interface */
		if_type = CCI_IF_SLAVE;
		break;
	case CCI400_PORT_M0:
	case CCI400_PORT_M1:
	case CCI400_PORT_M2:
		/* Master Interface */
		if_type = CCI_IF_MASTER;
		break;
	default:
		return -ENOENT;
	}

	if (ev_code >= cci_pmu->model->event_ranges[if_type].min &&
		ev_code <= cci_pmu->model->event_ranges[if_type].max)
		return hw_event;

	return -ENOENT;
}

static int probe_cci400_revision(struct cci_pmu *cci_pmu)
{
	int rev;
	rev = readl_relaxed(cci_pmu->ctrl_base + CCI_PID2) & CCI_PID2_REV_MASK;
	rev >>= CCI_PID2_REV_SHIFT;

	if (rev < CCI400_R1_PX)
		return CCI400_R0;
	else
		return CCI400_R1;
}

static const struct cci_pmu_model *probe_cci_model(struct cci_pmu *cci_pmu)
{
	if (platform_has_secure_cci_access())
		return &cci_pmu_models[probe_cci400_revision(cci_pmu)];
	return NULL;
}
#else	/* !CONFIG_ARM_CCI400_PMU */
static inline struct cci_pmu_model *probe_cci_model(struct cci_pmu *cci_pmu)
{
	return NULL;
}
#endif	/* CONFIG_ARM_CCI400_PMU */

#ifdef CONFIG_ARM_CCI5xx_PMU

/*
 * CCI5xx PMU event id is an 9-bit value made of two parts.
 *	 bits [8:5] - Source for the event
 *	 bits [4:0] - Event code (specific to type of interface)
 *
 *
 */

/* Port ids */
#define CCI5xx_PORT_S0			0x0
#define CCI5xx_PORT_S1			0x1
#define CCI5xx_PORT_S2			0x2
#define CCI5xx_PORT_S3			0x3
#define CCI5xx_PORT_S4			0x4
#define CCI5xx_PORT_S5			0x5
#define CCI5xx_PORT_S6			0x6

#define CCI5xx_PORT_M0			0x8
#define CCI5xx_PORT_M1			0x9
#define CCI5xx_PORT_M2			0xa
#define CCI5xx_PORT_M3			0xb
#define CCI5xx_PORT_M4			0xc
#define CCI5xx_PORT_M5			0xd
#define CCI5xx_PORT_M6			0xe

#define CCI5xx_PORT_GLOBAL		0xf

#define CCI5xx_PMU_EVENT_MASK		0x1ffUL
#define CCI5xx_PMU_EVENT_SOURCE_SHIFT	0x5
#define CCI5xx_PMU_EVENT_SOURCE_MASK	0xf
#define CCI5xx_PMU_EVENT_CODE_SHIFT	0x0
#define CCI5xx_PMU_EVENT_CODE_MASK	0x1f

#define CCI5xx_PMU_EVENT_SOURCE(event)	\
	((event >> CCI5xx_PMU_EVENT_SOURCE_SHIFT) & CCI5xx_PMU_EVENT_SOURCE_MASK)
#define CCI5xx_PMU_EVENT_CODE(event)	\
	((event >> CCI5xx_PMU_EVENT_CODE_SHIFT) & CCI5xx_PMU_EVENT_CODE_MASK)

#define CCI5xx_SLAVE_PORT_MIN_EV	0x00
#define CCI5xx_SLAVE_PORT_MAX_EV	0x1f
#define CCI5xx_MASTER_PORT_MIN_EV	0x00
#define CCI5xx_MASTER_PORT_MAX_EV	0x06
#define CCI5xx_GLOBAL_PORT_MIN_EV	0x00
#define CCI5xx_GLOBAL_PORT_MAX_EV	0x0f


#define CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(_name, _config) \
	CCI_EXT_ATTR_ENTRY(_name, cci5xx_pmu_global_event_show, \
					(unsigned long) _config)

static ssize_t cci5xx_pmu_global_event_show(struct device *dev,
				struct device_attribute *attr, char *buf);

static struct attribute *cci5xx_pmu_format_attrs[] = {
	CCI_FORMAT_EXT_ATTR_ENTRY(event, "config:0-4"),
	CCI_FORMAT_EXT_ATTR_ENTRY(source, "config:5-8"),
	NULL,
};

static struct attribute *cci5xx_pmu_event_attrs[] = {
	/* Slave events */
	CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_arvalid, 0x0),
	CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_dev, 0x1),
	CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_nonshareable, 0x2),
	CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_shareable_non_alloc, 0x3),
	CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_shareable_alloc, 0x4),
	CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_invalidate, 0x5),
	CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_cache_maint, 0x6),
	CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_dvm_msg, 0x7),
	CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_rval, 0x8),
	CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_hs_rlast_snoop, 0x9),
	CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_hs_awalid, 0xA),
	CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_dev, 0xB),
	CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_non_shareable, 0xC),
	CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_share_wb, 0xD),
	CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_share_wlu, 0xE),
	CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_share_wunique, 0xF),
	CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_evict, 0x10),
	CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_wrevict, 0x11),
	CCI_EVENT_EXT_ATTR_ENTRY(si_w_data_beat, 0x12),
	CCI_EVENT_EXT_ATTR_ENTRY(si_srq_acvalid, 0x13),
	CCI_EVENT_EXT_ATTR_ENTRY(si_srq_read, 0x14),
	CCI_EVENT_EXT_ATTR_ENTRY(si_srq_clean, 0x15),
	CCI_EVENT_EXT_ATTR_ENTRY(si_srq_data_transfer_low, 0x16),
	CCI_EVENT_EXT_ATTR_ENTRY(si_rrq_stall_arvalid, 0x17),
	CCI_EVENT_EXT_ATTR_ENTRY(si_r_data_stall, 0x18),
	CCI_EVENT_EXT_ATTR_ENTRY(si_wrq_stall, 0x19),
	CCI_EVENT_EXT_ATTR_ENTRY(si_w_data_stall, 0x1A),
	CCI_EVENT_EXT_ATTR_ENTRY(si_w_resp_stall, 0x1B),
	CCI_EVENT_EXT_ATTR_ENTRY(si_srq_stall, 0x1C),
	CCI_EVENT_EXT_ATTR_ENTRY(si_s_data_stall, 0x1D),
	CCI_EVENT_EXT_ATTR_ENTRY(si_rq_stall_ot_limit, 0x1E),
	CCI_EVENT_EXT_ATTR_ENTRY(si_r_stall_arbit, 0x1F),

	/* Master events */
	CCI_EVENT_EXT_ATTR_ENTRY(mi_r_data_beat_any, 0x0),
	CCI_EVENT_EXT_ATTR_ENTRY(mi_w_data_beat_any, 0x1),
	CCI_EVENT_EXT_ATTR_ENTRY(mi_rrq_stall, 0x2),
	CCI_EVENT_EXT_ATTR_ENTRY(mi_r_data_stall, 0x3),
	CCI_EVENT_EXT_ATTR_ENTRY(mi_wrq_stall, 0x4),
	CCI_EVENT_EXT_ATTR_ENTRY(mi_w_data_stall, 0x5),
	CCI_EVENT_EXT_ATTR_ENTRY(mi_w_resp_stall, 0x6),

	/* Global events */
	CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_access_filter_bank_0_1, 0x0),
	CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_access_filter_bank_2_3, 0x1),
	CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_access_filter_bank_4_5, 0x2),
	CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_access_filter_bank_6_7, 0x3),
	CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_access_miss_filter_bank_0_1, 0x4),
	CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_access_miss_filter_bank_2_3, 0x5),
	CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_access_miss_filter_bank_4_5, 0x6),
	CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_access_miss_filter_bank_6_7, 0x7),
	CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_back_invalidation, 0x8),
	CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_stall_alloc_busy, 0x9),
	CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_stall_tt_full, 0xA),
	CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_wrq, 0xB),
	CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_cd_hs, 0xC),
	CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_rq_stall_addr_hazard, 0xD),
	CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_rq_stall_tt_full, 0xE),
	CCI5xx_GLOBAL_EVENT_EXT_ATTR_ENTRY(cci_snoop_rq_tzmp1_prot, 0xF),
	NULL
};

static ssize_t cci5xx_pmu_global_event_show(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	struct dev_ext_attribute *eattr = container_of(attr,
					struct dev_ext_attribute, attr);
	/* Global events have single fixed source code */
	return snprintf(buf, PAGE_SIZE, "event=0x%lx,source=0x%x\n",
				(unsigned long)eattr->var, CCI5xx_PORT_GLOBAL);
}

/*
 * CCI500 provides 8 independent event counters that can count
 * any of the events available.
 * CCI500 PMU event source ids
 *	0x0-0x6 - Slave interfaces
 *	0x8-0xD - Master interfaces
 *	0xf     - Global Events
 *	0x7,0xe - Reserved
 */
static int cci500_validate_hw_event(struct cci_pmu *cci_pmu,
					unsigned long hw_event)
{
	u32 ev_source = CCI5xx_PMU_EVENT_SOURCE(hw_event);
	u32 ev_code = CCI5xx_PMU_EVENT_CODE(hw_event);
	int if_type;

	if (hw_event & ~CCI5xx_PMU_EVENT_MASK)
		return -ENOENT;

	switch (ev_source) {
	case CCI5xx_PORT_S0:
	case CCI5xx_PORT_S1:
	case CCI5xx_PORT_S2:
	case CCI5xx_PORT_S3:
	case CCI5xx_PORT_S4:
	case CCI5xx_PORT_S5:
	case CCI5xx_PORT_S6:
		if_type = CCI_IF_SLAVE;
		break;
	case CCI5xx_PORT_M0:
	case CCI5xx_PORT_M1:
	case CCI5xx_PORT_M2:
	case CCI5xx_PORT_M3:
	case CCI5xx_PORT_M4:
	case CCI5xx_PORT_M5:
		if_type = CCI_IF_MASTER;
		break;
	case CCI5xx_PORT_GLOBAL:
		if_type = CCI_IF_GLOBAL;
		break;
	default:
		return -ENOENT;
	}

	if (ev_code >= cci_pmu->model->event_ranges[if_type].min &&
		ev_code <= cci_pmu->model->event_ranges[if_type].max)
		return hw_event;

	return -ENOENT;
}

/*
 * CCI550 provides 8 independent event counters that can count
 * any of the events available.
 * CCI550 PMU event source ids
 *	0x0-0x6 - Slave interfaces
 *	0x8-0xe - Master interfaces
 *	0xf     - Global Events
 *	0x7	- Reserved
 */
static int cci550_validate_hw_event(struct cci_pmu *cci_pmu,
					unsigned long hw_event)
{
	u32 ev_source = CCI5xx_PMU_EVENT_SOURCE(hw_event);
	u32 ev_code = CCI5xx_PMU_EVENT_CODE(hw_event);
	int if_type;

	if (hw_event & ~CCI5xx_PMU_EVENT_MASK)
		return -ENOENT;

	switch (ev_source) {
	case CCI5xx_PORT_S0:
	case CCI5xx_PORT_S1:
	case CCI5xx_PORT_S2:
	case CCI5xx_PORT_S3:
	case CCI5xx_PORT_S4:
	case CCI5xx_PORT_S5:
	case CCI5xx_PORT_S6:
		if_type = CCI_IF_SLAVE;
		break;
	case CCI5xx_PORT_M0:
	case CCI5xx_PORT_M1:
	case CCI5xx_PORT_M2:
	case CCI5xx_PORT_M3:
	case CCI5xx_PORT_M4:
	case CCI5xx_PORT_M5:
	case CCI5xx_PORT_M6:
		if_type = CCI_IF_MASTER;
		break;
	case CCI5xx_PORT_GLOBAL:
		if_type = CCI_IF_GLOBAL;
		break;
	default:
		return -ENOENT;
	}

	if (ev_code >= cci_pmu->model->event_ranges[if_type].min &&
		ev_code <= cci_pmu->model->event_ranges[if_type].max)
		return hw_event;

	return -ENOENT;
}

#endif	/* CONFIG_ARM_CCI5xx_PMU */

/*
 * Program the CCI PMU counters which have PERF_HES_ARCH set
 * with the event period and mark them ready before we enable
 * PMU.
 */
static void cci_pmu_sync_counters(struct cci_pmu *cci_pmu)
{
	int i;
	struct cci_pmu_hw_events *cci_hw = &cci_pmu->hw_events;
	DECLARE_BITMAP(mask, HW_CNTRS_MAX);

	bitmap_zero(mask, cci_pmu->num_cntrs);
	for_each_set_bit(i, cci_pmu->hw_events.used_mask, cci_pmu->num_cntrs) {
		struct perf_event *event = cci_hw->events[i];

		if (WARN_ON(!event))
			continue;

		/* Leave the events which are not counting */
		if (event->hw.state & PERF_HES_STOPPED)
			continue;
		if (event->hw.state & PERF_HES_ARCH) {
			set_bit(i, mask);
			event->hw.state &= ~PERF_HES_ARCH;
		}
	}

	pmu_write_counters(cci_pmu, mask);
}

/* Should be called with cci_pmu->hw_events->pmu_lock held */
static void __cci_pmu_enable_nosync(struct cci_pmu *cci_pmu)
{
	u32 val;

	/* Enable all the PMU counters. */
	val = readl_relaxed(cci_pmu->ctrl_base + CCI_PMCR) | CCI_PMCR_CEN;
	writel(val, cci_pmu->ctrl_base + CCI_PMCR);
}

/* Should be called with cci_pmu->hw_events->pmu_lock held */
static void __cci_pmu_enable_sync(struct cci_pmu *cci_pmu)
{
	cci_pmu_sync_counters(cci_pmu);
	__cci_pmu_enable_nosync(cci_pmu);
}

/* Should be called with cci_pmu->hw_events->pmu_lock held */
static void __cci_pmu_disable(struct cci_pmu *cci_pmu)
{
	u32 val;

	/* Disable all the PMU counters. */
	val = readl_relaxed(cci_pmu->ctrl_base + CCI_PMCR) & ~CCI_PMCR_CEN;
	writel(val, cci_pmu->ctrl_base + CCI_PMCR);
}

static ssize_t cci_pmu_format_show(struct device *dev,
			struct device_attribute *attr, char *buf)
{
	struct dev_ext_attribute *eattr = container_of(attr,
				struct dev_ext_attribute, attr);
	return snprintf(buf, PAGE_SIZE, "%s\n", (char *)eattr->var);
}

static ssize_t cci_pmu_event_show(struct device *dev,
			struct device_attribute *attr, char *buf)
{
	struct dev_ext_attribute *eattr = container_of(attr,
				struct dev_ext_attribute, attr);
	/* source parameter is mandatory for normal PMU events */
	return snprintf(buf, PAGE_SIZE, "source=?,event=0x%lx\n",
					 (unsigned long)eattr->var);
}

static int pmu_is_valid_counter(struct cci_pmu *cci_pmu, int idx)
{
	return 0 <= idx && idx <= CCI_PMU_CNTR_LAST(cci_pmu);
}

static u32 pmu_read_register(struct cci_pmu *cci_pmu, int idx, unsigned int offset)
{
	return readl_relaxed(cci_pmu->base +
			     CCI_PMU_CNTR_BASE(cci_pmu->model, idx) + offset);
}

static void pmu_write_register(struct cci_pmu *cci_pmu, u32 value,
			       int idx, unsigned int offset)
{
	writel_relaxed(value, cci_pmu->base +
		       CCI_PMU_CNTR_BASE(cci_pmu->model, idx) + offset);
}

static void pmu_disable_counter(struct cci_pmu *cci_pmu, int idx)
{
	pmu_write_register(cci_pmu, 0, idx, CCI_PMU_CNTR_CTRL);
}

static void pmu_enable_counter(struct cci_pmu *cci_pmu, int idx)
{
	pmu_write_register(cci_pmu, 1, idx, CCI_PMU_CNTR_CTRL);
}

static bool __maybe_unused
pmu_counter_is_enabled(struct cci_pmu *cci_pmu, int idx)
{
	return (pmu_read_register(cci_pmu, idx, CCI_PMU_CNTR_CTRL) & 0x1) != 0;
}

static void pmu_set_event(struct cci_pmu *cci_pmu, int idx, unsigned long event)
{
	pmu_write_register(cci_pmu, event, idx, CCI_PMU_EVT_SEL);
}

/*
 * For all counters on the CCI-PMU, disable any 'enabled' counters,
 * saving the changed counters in the mask, so that we can restore
 * it later using pmu_restore_counters. The mask is private to the
 * caller. We cannot rely on the used_mask maintained by the CCI_PMU
 * as it only tells us if the counter is assigned to perf_event or not.
 * The state of the perf_event cannot be locked by the PMU layer, hence
 * we check the individual counter status (which can be locked by
 * cci_pm->hw_events->pmu_lock).
 *
 * @mask should be initialised to empty by the caller.
 */
static void __maybe_unused
pmu_save_counters(struct cci_pmu *cci_pmu, unsigned long *mask)
{
	int i;

	for (i = 0; i < cci_pmu->num_cntrs; i++) {
		if (pmu_counter_is_enabled(cci_pmu, i)) {
			set_bit(i, mask);
			pmu_disable_counter(cci_pmu, i);
		}
	}
}

/*
 * Restore the status of the counters. Reversal of the pmu_save_counters().
 * For each counter set in the mask, enable the counter back.
 */
static void __maybe_unused
pmu_restore_counters(struct cci_pmu *cci_pmu, unsigned long *mask)
{
	int i;

	for_each_set_bit(i, mask, cci_pmu->num_cntrs)
		pmu_enable_counter(cci_pmu, i);
}

/*
 * Returns the number of programmable counters actually implemented
 * by the cci
 */
static u32 pmu_get_max_counters(struct cci_pmu *cci_pmu)
{
	return (readl_relaxed(cci_pmu->ctrl_base + CCI_PMCR) &
		CCI_PMCR_NCNT_MASK) >> CCI_PMCR_NCNT_SHIFT;
}

static int pmu_get_event_idx(struct cci_pmu_hw_events *hw, struct perf_event *event)
{
	struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
	unsigned long cci_event = event->hw.config_base;
	int idx;

	if (cci_pmu->model->get_event_idx)
		return cci_pmu->model->get_event_idx(cci_pmu, hw, cci_event);

	/* Generic code to find an unused idx from the mask */
	for(idx = 0; idx <= CCI_PMU_CNTR_LAST(cci_pmu); idx++)
		if (!test_and_set_bit(idx, hw->used_mask))
			return idx;

	/* No counters available */
	return -EAGAIN;
}

static int pmu_map_event(struct perf_event *event)
{
	struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);

	if (event->attr.type < PERF_TYPE_MAX ||
			!cci_pmu->model->validate_hw_event)
		return -ENOENT;

	return	cci_pmu->model->validate_hw_event(cci_pmu, event->attr.config);
}

static int pmu_request_irq(struct cci_pmu *cci_pmu, irq_handler_t handler)
{
	int i;
	struct platform_device *pmu_device = cci_pmu->plat_device;

	if (unlikely(!pmu_device))
		return -ENODEV;

	if (cci_pmu->nr_irqs < 1) {
		dev_err(&pmu_device->dev, "no irqs for CCI PMUs defined\n");
		return -ENODEV;
	}

	/*
	 * Register all available CCI PMU interrupts. In the interrupt handler
	 * we iterate over the counters checking for interrupt source (the
	 * overflowing counter) and clear it.
	 *
	 * This should allow handling of non-unique interrupt for the counters.
	 */
	for (i = 0; i < cci_pmu->nr_irqs; i++) {
		int err = request_irq(cci_pmu->irqs[i], handler, IRQF_SHARED,
				"arm-cci-pmu", cci_pmu);
		if (err) {
			dev_err(&pmu_device->dev, "unable to request IRQ%d for ARM CCI PMU counters\n",
				cci_pmu->irqs[i]);
			return err;
		}

		set_bit(i, &cci_pmu->active_irqs);
	}

	return 0;
}

static void pmu_free_irq(struct cci_pmu *cci_pmu)
{
	int i;

	for (i = 0; i < cci_pmu->nr_irqs; i++) {
		if (!test_and_clear_bit(i, &cci_pmu->active_irqs))
			continue;

		free_irq(cci_pmu->irqs[i], cci_pmu);
	}
}

static u32 pmu_read_counter(struct perf_event *event)
{
	struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
	struct hw_perf_event *hw_counter = &event->hw;
	int idx = hw_counter->idx;
	u32 value;

	if (unlikely(!pmu_is_valid_counter(cci_pmu, idx))) {
		dev_err(&cci_pmu->plat_device->dev, "Invalid CCI PMU counter %d\n", idx);
		return 0;
	}
	value = pmu_read_register(cci_pmu, idx, CCI_PMU_CNTR);

	return value;
}

static void pmu_write_counter(struct cci_pmu *cci_pmu, u32 value, int idx)
{
	pmu_write_register(cci_pmu, value, idx, CCI_PMU_CNTR);
}

static void __pmu_write_counters(struct cci_pmu *cci_pmu, unsigned long *mask)
{
	int i;
	struct cci_pmu_hw_events *cci_hw = &cci_pmu->hw_events;

	for_each_set_bit(i, mask, cci_pmu->num_cntrs) {
		struct perf_event *event = cci_hw->events[i];

		if (WARN_ON(!event))
			continue;
		pmu_write_counter(cci_pmu, local64_read(&event->hw.prev_count), i);
	}
}

static void pmu_write_counters(struct cci_pmu *cci_pmu, unsigned long *mask)
{
	if (cci_pmu->model->write_counters)
		cci_pmu->model->write_counters(cci_pmu, mask);
	else
		__pmu_write_counters(cci_pmu, mask);
}

#ifdef CONFIG_ARM_CCI5xx_PMU

/*
 * CCI-500/CCI-550 has advanced power saving policies, which could gate the
 * clocks to the PMU counters, which makes the writes to them ineffective.
 * The only way to write to those counters is when the global counters
 * are enabled and the particular counter is enabled.
 *
 * So we do the following :
 *
 * 1) Disable all the PMU counters, saving their current state
 * 2) Enable the global PMU profiling, now that all counters are
 *    disabled.
 *
 * For each counter to be programmed, repeat steps 3-7:
 *
 * 3) Write an invalid event code to the event control register for the
      counter, so that the counters are not modified.
 * 4) Enable the counter control for the counter.
 * 5) Set the counter value
 * 6) Disable the counter
 * 7) Restore the event in the target counter
 *
 * 8) Disable the global PMU.
 * 9) Restore the status of the rest of the counters.
 *
 * We choose an event which for CCI-5xx is guaranteed not to count.
 * We use the highest possible event code (0x1f) for the master interface 0.
 */
#define CCI5xx_INVALID_EVENT	((CCI5xx_PORT_M0 << CCI5xx_PMU_EVENT_SOURCE_SHIFT) | \
				 (CCI5xx_PMU_EVENT_CODE_MASK << CCI5xx_PMU_EVENT_CODE_SHIFT))
static void cci5xx_pmu_write_counters(struct cci_pmu *cci_pmu, unsigned long *mask)
{
	int i;
	DECLARE_BITMAP(saved_mask, HW_CNTRS_MAX);

	bitmap_zero(saved_mask, cci_pmu->num_cntrs);
	pmu_save_counters(cci_pmu, saved_mask);

	/*
	 * Now that all the counters are disabled, we can safely turn the PMU on,
	 * without syncing the status of the counters
	 */
	__cci_pmu_enable_nosync(cci_pmu);

	for_each_set_bit(i, mask, cci_pmu->num_cntrs) {
		struct perf_event *event = cci_pmu->hw_events.events[i];

		if (WARN_ON(!event))
			continue;

		pmu_set_event(cci_pmu, i, CCI5xx_INVALID_EVENT);
		pmu_enable_counter(cci_pmu, i);
		pmu_write_counter(cci_pmu, local64_read(&event->hw.prev_count), i);
		pmu_disable_counter(cci_pmu, i);
		pmu_set_event(cci_pmu, i, event->hw.config_base);
	}

	__cci_pmu_disable(cci_pmu);

	pmu_restore_counters(cci_pmu, saved_mask);
}

#endif	/* CONFIG_ARM_CCI5xx_PMU */

static u64 pmu_event_update(struct perf_event *event)
{
	struct hw_perf_event *hwc = &event->hw;
	u64 delta, prev_raw_count, new_raw_count;

	do {
		prev_raw_count = local64_read(&hwc->prev_count);
		new_raw_count = pmu_read_counter(event);
	} while (local64_cmpxchg(&hwc->prev_count, prev_raw_count,
		 new_raw_count) != prev_raw_count);

	delta = (new_raw_count - prev_raw_count) & CCI_PMU_CNTR_MASK;

	local64_add(delta, &event->count);

	return new_raw_count;
}

static void pmu_read(struct perf_event *event)
{
	pmu_event_update(event);
}

static void pmu_event_set_period(struct perf_event *event)
{
	struct hw_perf_event *hwc = &event->hw;
	/*
	 * The CCI PMU counters have a period of 2^32. To account for the
	 * possiblity of extreme interrupt latency we program for a period of
	 * half that. Hopefully we can handle the interrupt before another 2^31
	 * events occur and the counter overtakes its previous value.
	 */
	u64 val = 1ULL << 31;
	local64_set(&hwc->prev_count, val);

	/*
	 * CCI PMU uses PERF_HES_ARCH to keep track of the counters, whose
	 * values needs to be sync-ed with the s/w state before the PMU is
	 * enabled.
	 * Mark this counter for sync.
	 */
	hwc->state |= PERF_HES_ARCH;
}

static irqreturn_t pmu_handle_irq(int irq_num, void *dev)
{
	unsigned long flags;
	struct cci_pmu *cci_pmu = dev;
	struct cci_pmu_hw_events *events = &cci_pmu->hw_events;
	int idx, handled = IRQ_NONE;

	raw_spin_lock_irqsave(&events->pmu_lock, flags);

	/* Disable the PMU while we walk through the counters */
	__cci_pmu_disable(cci_pmu);
	/*
	 * Iterate over counters and update the corresponding perf events.
	 * This should work regardless of whether we have per-counter overflow
	 * interrupt or a combined overflow interrupt.
	 */
	for (idx = 0; idx <= CCI_PMU_CNTR_LAST(cci_pmu); idx++) {
		struct perf_event *event = events->events[idx];

		if (!event)
			continue;

		/* Did this counter overflow? */
		if (!(pmu_read_register(cci_pmu, idx, CCI_PMU_OVRFLW) &
		      CCI_PMU_OVRFLW_FLAG))
			continue;

		pmu_write_register(cci_pmu, CCI_PMU_OVRFLW_FLAG, idx,
							CCI_PMU_OVRFLW);

		pmu_event_update(event);
		pmu_event_set_period(event);
		handled = IRQ_HANDLED;
	}

	/* Enable the PMU and sync possibly overflowed counters */
	__cci_pmu_enable_sync(cci_pmu);
	raw_spin_unlock_irqrestore(&events->pmu_lock, flags);

	return IRQ_RETVAL(handled);
}

static int cci_pmu_get_hw(struct cci_pmu *cci_pmu)
{
	int ret = pmu_request_irq(cci_pmu, pmu_handle_irq);
	if (ret) {
		pmu_free_irq(cci_pmu);
		return ret;
	}
	return 0;
}

static void cci_pmu_put_hw(struct cci_pmu *cci_pmu)
{
	pmu_free_irq(cci_pmu);
}

static void hw_perf_event_destroy(struct perf_event *event)
{
	struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
	atomic_t *active_events = &cci_pmu->active_events;
	struct mutex *reserve_mutex = &cci_pmu->reserve_mutex;

	if (atomic_dec_and_mutex_lock(active_events, reserve_mutex)) {
		cci_pmu_put_hw(cci_pmu);
		mutex_unlock(reserve_mutex);
	}
}

static void cci_pmu_enable(struct pmu *pmu)
{
	struct cci_pmu *cci_pmu = to_cci_pmu(pmu);
	struct cci_pmu_hw_events *hw_events = &cci_pmu->hw_events;
	int enabled = bitmap_weight(hw_events->used_mask, cci_pmu->num_cntrs);
	unsigned long flags;

	if (!enabled)
		return;

	raw_spin_lock_irqsave(&hw_events->pmu_lock, flags);
	__cci_pmu_enable_sync(cci_pmu);
	raw_spin_unlock_irqrestore(&hw_events->pmu_lock, flags);

}

static void cci_pmu_disable(struct pmu *pmu)
{
	struct cci_pmu *cci_pmu = to_cci_pmu(pmu);
	struct cci_pmu_hw_events *hw_events = &cci_pmu->hw_events;
	unsigned long flags;

	raw_spin_lock_irqsave(&hw_events->pmu_lock, flags);
	__cci_pmu_disable(cci_pmu);
	raw_spin_unlock_irqrestore(&hw_events->pmu_lock, flags);
}

/*
 * Check if the idx represents a non-programmable counter.
 * All the fixed event counters are mapped before the programmable
 * counters.
 */
static bool pmu_fixed_hw_idx(struct cci_pmu *cci_pmu, int idx)
{
	return (idx >= 0) && (idx < cci_pmu->model->fixed_hw_cntrs);
}

static void cci_pmu_start(struct perf_event *event, int pmu_flags)
{
	struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
	struct cci_pmu_hw_events *hw_events = &cci_pmu->hw_events;
	struct hw_perf_event *hwc = &event->hw;
	int idx = hwc->idx;
	unsigned long flags;

	/*
	 * To handle interrupt latency, we always reprogram the period
	 * regardlesss of PERF_EF_RELOAD.
	 */
	if (pmu_flags & PERF_EF_RELOAD)
		WARN_ON_ONCE(!(hwc->state & PERF_HES_UPTODATE));

	hwc->state = 0;

	if (unlikely(!pmu_is_valid_counter(cci_pmu, idx))) {
		dev_err(&cci_pmu->plat_device->dev, "Invalid CCI PMU counter %d\n", idx);
		return;
	}

	raw_spin_lock_irqsave(&hw_events->pmu_lock, flags);

	/* Configure the counter unless you are counting a fixed event */
	if (!pmu_fixed_hw_idx(cci_pmu, idx))
		pmu_set_event(cci_pmu, idx, hwc->config_base);

	pmu_event_set_period(event);
	pmu_enable_counter(cci_pmu, idx);

	raw_spin_unlock_irqrestore(&hw_events->pmu_lock, flags);
}

static void cci_pmu_stop(struct perf_event *event, int pmu_flags)
{
	struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
	struct hw_perf_event *hwc = &event->hw;
	int idx = hwc->idx;

	if (hwc->state & PERF_HES_STOPPED)
		return;

	if (unlikely(!pmu_is_valid_counter(cci_pmu, idx))) {
		dev_err(&cci_pmu->plat_device->dev, "Invalid CCI PMU counter %d\n", idx);
		return;
	}

	/*
	 * We always reprogram the counter, so ignore PERF_EF_UPDATE. See
	 * cci_pmu_start()
	 */
	pmu_disable_counter(cci_pmu, idx);
	pmu_event_update(event);
	hwc->state |= PERF_HES_STOPPED | PERF_HES_UPTODATE;
}

static int cci_pmu_add(struct perf_event *event, int flags)
{
	struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
	struct cci_pmu_hw_events *hw_events = &cci_pmu->hw_events;
	struct hw_perf_event *hwc = &event->hw;
	int idx;

	/* If we don't have a space for the counter then finish early. */
	idx = pmu_get_event_idx(hw_events, event);
	if (idx < 0)
		return idx;

	event->hw.idx = idx;
	hw_events->events[idx] = event;

	hwc->state = PERF_HES_STOPPED | PERF_HES_UPTODATE;
	if (flags & PERF_EF_START)
		cci_pmu_start(event, PERF_EF_RELOAD);

	/* Propagate our changes to the userspace mapping. */
	perf_event_update_userpage(event);

	return 0;
}

static void cci_pmu_del(struct perf_event *event, int flags)
{
	struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
	struct cci_pmu_hw_events *hw_events = &cci_pmu->hw_events;
	struct hw_perf_event *hwc = &event->hw;
	int idx = hwc->idx;

	cci_pmu_stop(event, PERF_EF_UPDATE);
	hw_events->events[idx] = NULL;
	clear_bit(idx, hw_events->used_mask);

	perf_event_update_userpage(event);
}

static int validate_event(struct pmu *cci_pmu,
			  struct cci_pmu_hw_events *hw_events,
			  struct perf_event *event)
{
	if (is_software_event(event))
		return 1;

	/*
	 * Reject groups spanning multiple HW PMUs (e.g. CPU + CCI). The
	 * core perf code won't check that the pmu->ctx == leader->ctx
	 * until after pmu->event_init(event).
	 */
	if (event->pmu != cci_pmu)
		return 0;

	if (event->state < PERF_EVENT_STATE_OFF)
		return 1;

	if (event->state == PERF_EVENT_STATE_OFF && !event->attr.enable_on_exec)
		return 1;

	return pmu_get_event_idx(hw_events, event) >= 0;
}

static int validate_group(struct perf_event *event)
{
	struct perf_event *sibling, *leader = event->group_leader;
	struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
	unsigned long mask[BITS_TO_LONGS(HW_CNTRS_MAX)];
	struct cci_pmu_hw_events fake_pmu = {
		/*
		 * Initialise the fake PMU. We only need to populate the
		 * used_mask for the purposes of validation.
		 */
		.used_mask = mask,
	};
	memset(mask, 0, BITS_TO_LONGS(cci_pmu->num_cntrs) * sizeof(unsigned long));

	if (!validate_event(event->pmu, &fake_pmu, leader))
		return -EINVAL;

	for_each_sibling_event(sibling, leader) {
		if (!validate_event(event->pmu, &fake_pmu, sibling))
			return -EINVAL;
	}

	if (!validate_event(event->pmu, &fake_pmu, event))
		return -EINVAL;

	return 0;
}

static int __hw_perf_event_init(struct perf_event *event)
{
	struct hw_perf_event *hwc = &event->hw;
	int mapping;

	mapping = pmu_map_event(event);

	if (mapping < 0) {
		pr_debug("event %x:%llx not supported\n", event->attr.type,
			 event->attr.config);
		return mapping;
	}

	/*
	 * We don't assign an index until we actually place the event onto
	 * hardware. Use -1 to signify that we haven't decided where to put it
	 * yet.
	 */
	hwc->idx		= -1;
	hwc->config_base	= 0;
	hwc->config		= 0;
	hwc->event_base		= 0;

	/*
	 * Store the event encoding into the config_base field.
	 */
	hwc->config_base	    |= (unsigned long)mapping;

	if (event->group_leader != event) {
		if (validate_group(event) != 0)
			return -EINVAL;
	}

	return 0;
}

static int cci_pmu_event_init(struct perf_event *event)
{
	struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
	atomic_t *active_events = &cci_pmu->active_events;
	int err = 0;

	if (event->attr.type != event->pmu->type)
		return -ENOENT;

	/* Shared by all CPUs, no meaningful state to sample */
	if (is_sampling_event(event) || event->attach_state & PERF_ATTACH_TASK)
		return -EOPNOTSUPP;

	/*
	 * Following the example set by other "uncore" PMUs, we accept any CPU
	 * and rewrite its affinity dynamically rather than having perf core
	 * handle cpu == -1 and pid == -1 for this case.
	 *
	 * The perf core will pin online CPUs for the duration of this call and
	 * the event being installed into its context, so the PMU's CPU can't
	 * change under our feet.
	 */
	if (event->cpu < 0)
		return -EINVAL;
	event->cpu = cci_pmu->cpu;

	event->destroy = hw_perf_event_destroy;
	if (!atomic_inc_not_zero(active_events)) {
		mutex_lock(&cci_pmu->reserve_mutex);
		if (atomic_read(active_events) == 0)
			err = cci_pmu_get_hw(cci_pmu);
		if (!err)
			atomic_inc(active_events);
		mutex_unlock(&cci_pmu->reserve_mutex);
	}
	if (err)
		return err;

	err = __hw_perf_event_init(event);
	if (err)
		hw_perf_event_destroy(event);

	return err;
}

static ssize_t pmu_cpumask_attr_show(struct device *dev,
				     struct device_attribute *attr, char *buf)
{
	struct pmu *pmu = dev_get_drvdata(dev);
	struct cci_pmu *cci_pmu = to_cci_pmu(pmu);

	return cpumap_print_to_pagebuf(true, buf, cpumask_of(cci_pmu->cpu));
}

static struct device_attribute pmu_cpumask_attr =
	__ATTR(cpumask, S_IRUGO, pmu_cpumask_attr_show, NULL);

static struct attribute *pmu_attrs[] = {
	&pmu_cpumask_attr.attr,
	NULL,
};

static struct attribute_group pmu_attr_group = {
	.attrs = pmu_attrs,
};

static struct attribute_group pmu_format_attr_group = {
	.name = "format",
	.attrs = NULL,		/* Filled in cci_pmu_init_attrs */
};

static struct attribute_group pmu_event_attr_group = {
	.name = "events",
	.attrs = NULL,		/* Filled in cci_pmu_init_attrs */
};

static const struct attribute_group *pmu_attr_groups[] = {
	&pmu_attr_group,
	&pmu_format_attr_group,
	&pmu_event_attr_group,
	NULL
};

static int cci_pmu_init(struct cci_pmu *cci_pmu, struct platform_device *pdev)
{
	const struct cci_pmu_model *model = cci_pmu->model;
	char *name = model->name;
	u32 num_cntrs;

	if (WARN_ON(model->num_hw_cntrs > NUM_HW_CNTRS_MAX))
		return -EINVAL;
	if (WARN_ON(model->fixed_hw_cntrs > FIXED_HW_CNTRS_MAX))
		return -EINVAL;

	pmu_event_attr_group.attrs = model->event_attrs;
	pmu_format_attr_group.attrs = model->format_attrs;

	cci_pmu->pmu = (struct pmu) {
		.module		= THIS_MODULE,
		.name		= cci_pmu->model->name,
		.task_ctx_nr	= perf_invalid_context,
		.pmu_enable	= cci_pmu_enable,
		.pmu_disable	= cci_pmu_disable,
		.event_init	= cci_pmu_event_init,
		.add		= cci_pmu_add,
		.del		= cci_pmu_del,
		.start		= cci_pmu_start,
		.stop		= cci_pmu_stop,
		.read		= pmu_read,
		.attr_groups	= pmu_attr_groups,
		.capabilities	= PERF_PMU_CAP_NO_EXCLUDE,
	};

	cci_pmu->plat_device = pdev;
	num_cntrs = pmu_get_max_counters(cci_pmu);
	if (num_cntrs > cci_pmu->model->num_hw_cntrs) {
		dev_warn(&pdev->dev,
			"PMU implements more counters(%d) than supported by"
			" the model(%d), truncated.",
			num_cntrs, cci_pmu->model->num_hw_cntrs);
		num_cntrs = cci_pmu->model->num_hw_cntrs;
	}
	cci_pmu->num_cntrs = num_cntrs + cci_pmu->model->fixed_hw_cntrs;

	return perf_pmu_register(&cci_pmu->pmu, name, -1);
}

static int cci_pmu_offline_cpu(unsigned int cpu)
{
	int target;

	if (!g_cci_pmu || cpu != g_cci_pmu->cpu)
		return 0;

	target = cpumask_any_but(cpu_online_mask, cpu);
	if (target >= nr_cpu_ids)
		return 0;

	perf_pmu_migrate_context(&g_cci_pmu->pmu, cpu, target);
	g_cci_pmu->cpu = target;
	return 0;
}

static __maybe_unused struct cci_pmu_model cci_pmu_models[] = {
#ifdef CONFIG_ARM_CCI400_PMU
	[CCI400_R0] = {
		.name = "CCI_400",
		.fixed_hw_cntrs = FIXED_HW_CNTRS_CII_4XX, /* Cycle counter */
		.num_hw_cntrs = NUM_HW_CNTRS_CII_4XX,
		.cntr_size = SZ_4K,
		.format_attrs = cci400_pmu_format_attrs,
		.event_attrs = cci400_r0_pmu_event_attrs,
		.event_ranges = {
			[CCI_IF_SLAVE] = {
				CCI400_R0_SLAVE_PORT_MIN_EV,
				CCI400_R0_SLAVE_PORT_MAX_EV,
			},
			[CCI_IF_MASTER] = {
				CCI400_R0_MASTER_PORT_MIN_EV,
				CCI400_R0_MASTER_PORT_MAX_EV,
			},
		},
		.validate_hw_event = cci400_validate_hw_event,
		.get_event_idx = cci400_get_event_idx,
	},
	[CCI400_R1] = {
		.name = "CCI_400_r1",
		.fixed_hw_cntrs = FIXED_HW_CNTRS_CII_4XX, /* Cycle counter */
		.num_hw_cntrs = NUM_HW_CNTRS_CII_4XX,
		.cntr_size = SZ_4K,
		.format_attrs = cci400_pmu_format_attrs,
		.event_attrs = cci400_r1_pmu_event_attrs,
		.event_ranges = {
			[CCI_IF_SLAVE] = {
				CCI400_R1_SLAVE_PORT_MIN_EV,
				CCI400_R1_SLAVE_PORT_MAX_EV,
			},
			[CCI_IF_MASTER] = {
				CCI400_R1_MASTER_PORT_MIN_EV,
				CCI400_R1_MASTER_PORT_MAX_EV,
			},
		},
		.validate_hw_event = cci400_validate_hw_event,
		.get_event_idx = cci400_get_event_idx,
	},
#endif
#ifdef CONFIG_ARM_CCI5xx_PMU
	[CCI500_R0] = {
		.name = "CCI_500",
		.fixed_hw_cntrs = FIXED_HW_CNTRS_CII_5XX,
		.num_hw_cntrs = NUM_HW_CNTRS_CII_5XX,
		.cntr_size = SZ_64K,
		.format_attrs = cci5xx_pmu_format_attrs,
		.event_attrs = cci5xx_pmu_event_attrs,
		.event_ranges = {
			[CCI_IF_SLAVE] = {
				CCI5xx_SLAVE_PORT_MIN_EV,
				CCI5xx_SLAVE_PORT_MAX_EV,
			},
			[CCI_IF_MASTER] = {
				CCI5xx_MASTER_PORT_MIN_EV,
				CCI5xx_MASTER_PORT_MAX_EV,
			},
			[CCI_IF_GLOBAL] = {
				CCI5xx_GLOBAL_PORT_MIN_EV,
				CCI5xx_GLOBAL_PORT_MAX_EV,
			},
		},
		.validate_hw_event = cci500_validate_hw_event,
		.write_counters	= cci5xx_pmu_write_counters,
	},
	[CCI550_R0] = {
		.name = "CCI_550",
		.fixed_hw_cntrs = FIXED_HW_CNTRS_CII_5XX,
		.num_hw_cntrs = NUM_HW_CNTRS_CII_5XX,
		.cntr_size = SZ_64K,
		.format_attrs = cci5xx_pmu_format_attrs,
		.event_attrs = cci5xx_pmu_event_attrs,
		.event_ranges = {
			[CCI_IF_SLAVE] = {
				CCI5xx_SLAVE_PORT_MIN_EV,
				CCI5xx_SLAVE_PORT_MAX_EV,
			},
			[CCI_IF_MASTER] = {
				CCI5xx_MASTER_PORT_MIN_EV,
				CCI5xx_MASTER_PORT_MAX_EV,
			},
			[CCI_IF_GLOBAL] = {
				CCI5xx_GLOBAL_PORT_MIN_EV,
				CCI5xx_GLOBAL_PORT_MAX_EV,
			},
		},
		.validate_hw_event = cci550_validate_hw_event,
		.write_counters	= cci5xx_pmu_write_counters,
	},
#endif
};

static const struct of_device_id arm_cci_pmu_matches[] = {
#ifdef CONFIG_ARM_CCI400_PMU
	{
		.compatible = "arm,cci-400-pmu",
		.data	= NULL,
	},
	{
		.compatible = "arm,cci-400-pmu,r0",
		.data	= &cci_pmu_models[CCI400_R0],
	},
	{
		.compatible = "arm,cci-400-pmu,r1",
		.data	= &cci_pmu_models[CCI400_R1],
	},
#endif
#ifdef CONFIG_ARM_CCI5xx_PMU
	{
		.compatible = "arm,cci-500-pmu,r0",
		.data = &cci_pmu_models[CCI500_R0],
	},
	{
		.compatible = "arm,cci-550-pmu,r0",
		.data = &cci_pmu_models[CCI550_R0],
	},
#endif
	{},
};
MODULE_DEVICE_TABLE(of, arm_cci_pmu_matches);

static bool is_duplicate_irq(int irq, int *irqs, int nr_irqs)
{
	int i;

	for (i = 0; i < nr_irqs; i++)
		if (irq == irqs[i])
			return true;

	return false;
}

static struct cci_pmu *cci_pmu_alloc(struct device *dev)
{
	struct cci_pmu *cci_pmu;
	const struct cci_pmu_model *model;

	/*
	 * All allocations are devm_* hence we don't have to free
	 * them explicitly on an error, as it would end up in driver
	 * detach.
	 */
	cci_pmu = devm_kzalloc(dev, sizeof(*cci_pmu), GFP_KERNEL);
	if (!cci_pmu)
		return ERR_PTR(-ENOMEM);

	cci_pmu->ctrl_base = *(void __iomem **)dev->platform_data;

	model = of_device_get_match_data(dev);
	if (!model) {
		dev_warn(dev,
			 "DEPRECATED compatible property, requires secure access to CCI registers");
		model = probe_cci_model(cci_pmu);
	}
	if (!model) {
		dev_warn(dev, "CCI PMU version not supported\n");
		return ERR_PTR(-ENODEV);
	}

	cci_pmu->model = model;
	cci_pmu->irqs = devm_kcalloc(dev, CCI_PMU_MAX_HW_CNTRS(model),
					sizeof(*cci_pmu->irqs), GFP_KERNEL);
	if (!cci_pmu->irqs)
		return ERR_PTR(-ENOMEM);
	cci_pmu->hw_events.events = devm_kcalloc(dev,
					     CCI_PMU_MAX_HW_CNTRS(model),
					     sizeof(*cci_pmu->hw_events.events),
					     GFP_KERNEL);
	if (!cci_pmu->hw_events.events)
		return ERR_PTR(-ENOMEM);
	cci_pmu->hw_events.used_mask = devm_kcalloc(dev,
						BITS_TO_LONGS(CCI_PMU_MAX_HW_CNTRS(model)),
						sizeof(*cci_pmu->hw_events.used_mask),
						GFP_KERNEL);
	if (!cci_pmu->hw_events.used_mask)
		return ERR_PTR(-ENOMEM);

	return cci_pmu;
}

static int cci_pmu_probe(struct platform_device *pdev)
{
	struct resource *res;
	struct cci_pmu *cci_pmu;
	int i, ret, irq;

	cci_pmu = cci_pmu_alloc(&pdev->dev);
	if (IS_ERR(cci_pmu))
		return PTR_ERR(cci_pmu);

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	cci_pmu->base = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(cci_pmu->base))
		return -ENOMEM;

	/*
	 * CCI PMU has one overflow interrupt per counter; but some may be tied
	 * together to a common interrupt.
	 */
	cci_pmu->nr_irqs = 0;
	for (i = 0; i < CCI_PMU_MAX_HW_CNTRS(cci_pmu->model); i++) {
		irq = platform_get_irq(pdev, i);
		if (irq < 0)
			break;

		if (is_duplicate_irq(irq, cci_pmu->irqs, cci_pmu->nr_irqs))
			continue;

		cci_pmu->irqs[cci_pmu->nr_irqs++] = irq;
	}

	/*
	 * Ensure that the device tree has as many interrupts as the number
	 * of counters.
	 */
	if (i < CCI_PMU_MAX_HW_CNTRS(cci_pmu->model)) {
		dev_warn(&pdev->dev, "In-correct number of interrupts: %d, should be %d\n",
			i, CCI_PMU_MAX_HW_CNTRS(cci_pmu->model));
		return -EINVAL;
	}

	raw_spin_lock_init(&cci_pmu->hw_events.pmu_lock);
	mutex_init(&cci_pmu->reserve_mutex);
	atomic_set(&cci_pmu->active_events, 0);

	cci_pmu->cpu = raw_smp_processor_id();
	g_cci_pmu = cci_pmu;
	cpuhp_setup_state_nocalls(CPUHP_AP_PERF_ARM_CCI_ONLINE,
				  "perf/arm/cci:online", NULL,
				  cci_pmu_offline_cpu);

	ret = cci_pmu_init(cci_pmu, pdev);
	if (ret)
		goto error_pmu_init;

	pr_info("ARM %s PMU driver probed", cci_pmu->model->name);
	return 0;

error_pmu_init:
	cpuhp_remove_state(CPUHP_AP_PERF_ARM_CCI_ONLINE);
	g_cci_pmu = NULL;
	return ret;
}

static int cci_pmu_remove(struct platform_device *pdev)
{
	if (!g_cci_pmu)
		return 0;

	cpuhp_remove_state(CPUHP_AP_PERF_ARM_CCI_ONLINE);
	perf_pmu_unregister(&g_cci_pmu->pmu);
	g_cci_pmu = NULL;

	return 0;
}

static struct platform_driver cci_pmu_driver = {
	.driver = {
		   .name = DRIVER_NAME,
		   .of_match_table = arm_cci_pmu_matches,
		  },
	.probe = cci_pmu_probe,
	.remove = cci_pmu_remove,
};

module_platform_driver(cci_pmu_driver);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("ARM CCI PMU support");