drivers/perf/hisilicon/hisi_uncore_pa_pmu.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * HiSilicon PA uncore Hardware event counters support
   4  *
   5  * Copyright (C) 2020 HiSilicon Limited
   6  * Author: Shaokun Zhang <zhangshaokun@hisilicon.com>
   7  *
   8  * This code is based on the uncore PMUs like arm-cci and arm-ccn.
   9  */
  10 #include <linux/acpi.h>
  11 #include <linux/cpuhotplug.h>
  12 #include <linux/interrupt.h>
  13 #include <linux/irq.h>
  14 #include <linux/list.h>
  15 #include <linux/smp.h>
  16
  17 #include "hisi_uncore_pmu.h"
  18
  19 /* PA register definition */
  20 #define PA_PERF_CTRL                    0x1c00
  21 #define PA_EVENT_CTRL                   0x1c04
  22 #define PA_TT_CTRL                      0x1c08
  23 #define PA_TGTID_CTRL                   0x1c14
  24 #define PA_SRCID_CTRL                   0x1c18
  25
  26 /* H32 PA interrupt registers */
  27 #define PA_INT_MASK                     0x1c70
  28 #define PA_INT_STATUS                   0x1c78
  29 #define PA_INT_CLEAR                    0x1c7c
  30
  31 #define H60PA_INT_STATUS                0x1c70
  32 #define H60PA_INT_MASK                  0x1c74
  33
  34 #define PA_EVENT_TYPE0                  0x1c80
  35 #define PA_PMU_VERSION                  0x1cf0
  36 #define PA_EVENT_CNT0_L                 0x1d00
  37
  38 #define PA_EVTYPE_MASK                  0xff
  39 #define PA_NR_COUNTERS                  0x8
  40 #define PA_PERF_CTRL_EN                 BIT(0)
  41 #define PA_TRACETAG_EN                  BIT(4)
  42 #define PA_TGTID_EN                     BIT(11)
  43 #define PA_SRCID_EN                     BIT(11)
  44 #define PA_TGTID_NONE                   0
  45 #define PA_SRCID_NONE                   0
  46 #define PA_TGTID_MSK_SHIFT              12
  47 #define PA_SRCID_MSK_SHIFT              12
  48
  49 HISI_PMU_EVENT_ATTR_EXTRACTOR(tgtid_cmd, config1, 10, 0);
  50 HISI_PMU_EVENT_ATTR_EXTRACTOR(tgtid_msk, config1, 21, 11);
  51 HISI_PMU_EVENT_ATTR_EXTRACTOR(srcid_cmd, config1, 32, 22);
  52 HISI_PMU_EVENT_ATTR_EXTRACTOR(srcid_msk, config1, 43, 33);
  53 HISI_PMU_EVENT_ATTR_EXTRACTOR(tracetag_en, config1, 44, 44);
  54
  55 struct hisi_pa_pmu_int_regs {
  56         u32 mask_offset;
  57         u32 clear_offset;
  58         u32 status_offset;
  59 };
  60
  61 static void hisi_pa_pmu_enable_tracetag(struct perf_event *event)
  62 {
  63         struct hisi_pmu *pa_pmu = to_hisi_pmu(event->pmu);
  64         u32 tt_en = hisi_get_tracetag_en(event);
  65
  66         if (tt_en) {
  67                 u32 val;
  68
  69                 val = readl(pa_pmu->base + PA_TT_CTRL);
  70                 val |= PA_TRACETAG_EN;
  71                 writel(val, pa_pmu->base + PA_TT_CTRL);
  72         }
  73 }
  74
  75 static void hisi_pa_pmu_clear_tracetag(struct perf_event *event)
  76 {
  77         struct hisi_pmu *pa_pmu = to_hisi_pmu(event->pmu);
  78         u32 tt_en = hisi_get_tracetag_en(event);
  79
  80         if (tt_en) {
  81                 u32 val;
  82
  83                 val = readl(pa_pmu->base + PA_TT_CTRL);
  84                 val &= ~PA_TRACETAG_EN;
  85                 writel(val, pa_pmu->base + PA_TT_CTRL);
  86         }
  87 }
  88
  89 static void hisi_pa_pmu_config_tgtid(struct perf_event *event)
  90 {
  91         struct hisi_pmu *pa_pmu = to_hisi_pmu(event->pmu);
  92         u32 cmd = hisi_get_tgtid_cmd(event);
  93
  94         if (cmd) {
  95                 u32 msk = hisi_get_tgtid_msk(event);
  96                 u32 val = cmd | PA_TGTID_EN | (msk << PA_TGTID_MSK_SHIFT);
  97
  98                 writel(val, pa_pmu->base + PA_TGTID_CTRL);
  99         }
 100 }
 101
 102 static void hisi_pa_pmu_clear_tgtid(struct perf_event *event)
 103 {
 104         struct hisi_pmu *pa_pmu = to_hisi_pmu(event->pmu);
 105         u32 cmd = hisi_get_tgtid_cmd(event);
 106
 107         if (cmd)
 108                 writel(PA_TGTID_NONE, pa_pmu->base + PA_TGTID_CTRL);
 109 }
 110
 111 static void hisi_pa_pmu_config_srcid(struct perf_event *event)
 112 {
 113         struct hisi_pmu *pa_pmu = to_hisi_pmu(event->pmu);
 114         u32 cmd = hisi_get_srcid_cmd(event);
 115
 116         if (cmd) {
 117                 u32 msk = hisi_get_srcid_msk(event);
 118                 u32 val = cmd | PA_SRCID_EN | (msk << PA_SRCID_MSK_SHIFT);
 119
 120                 writel(val, pa_pmu->base + PA_SRCID_CTRL);
 121         }
 122 }
 123
 124 static void hisi_pa_pmu_clear_srcid(struct perf_event *event)
 125 {
 126         struct hisi_pmu *pa_pmu = to_hisi_pmu(event->pmu);
 127         u32 cmd = hisi_get_srcid_cmd(event);
 128
 129         if (cmd)
 130                 writel(PA_SRCID_NONE, pa_pmu->base + PA_SRCID_CTRL);
 131 }
 132
 133 static void hisi_pa_pmu_enable_filter(struct perf_event *event)
 134 {
 135         if (event->attr.config1 != 0x0) {
 136                 hisi_pa_pmu_enable_tracetag(event);
 137                 hisi_pa_pmu_config_srcid(event);
 138                 hisi_pa_pmu_config_tgtid(event);
 139         }
 140 }
 141
 142 static void hisi_pa_pmu_disable_filter(struct perf_event *event)
 143 {
 144         if (event->attr.config1 != 0x0) {
 145                 hisi_pa_pmu_clear_tgtid(event);
 146                 hisi_pa_pmu_clear_srcid(event);
 147                 hisi_pa_pmu_clear_tracetag(event);
 148         }
 149 }
 150
 151 static u32 hisi_pa_pmu_get_counter_offset(int idx)
 152 {
 153         return (PA_EVENT_CNT0_L + idx * 8);
 154 }
 155
 156 static u64 hisi_pa_pmu_read_counter(struct hisi_pmu *pa_pmu,
 157                                     struct hw_perf_event *hwc)
 158 {
 159         return readq(pa_pmu->base + hisi_pa_pmu_get_counter_offset(hwc->idx));
 160 }
 161
 162 static void hisi_pa_pmu_write_counter(struct hisi_pmu *pa_pmu,
 163                                       struct hw_perf_event *hwc, u64 val)
 164 {
 165         writeq(val, pa_pmu->base + hisi_pa_pmu_get_counter_offset(hwc->idx));
 166 }
 167
 168 static void hisi_pa_pmu_write_evtype(struct hisi_pmu *pa_pmu, int idx,
 169                                      u32 type)
 170 {
 171         u32 reg, reg_idx, shift, val;
 172
 173         /*
 174          * Select the appropriate event select register(PA_EVENT_TYPE0/1).
 175          * There are 2 event select registers for the 8 hardware counters.
 176          * Event code is 8-bits and for the former 4 hardware counters,
 177          * PA_EVENT_TYPE0 is chosen. For the latter 4 hardware counters,
 178          * PA_EVENT_TYPE1 is chosen.
 179          */
 180         reg = PA_EVENT_TYPE0 + (idx / 4) * 4;
 181         reg_idx = idx % 4;
 182         shift = 8 * reg_idx;
 183
 184         /* Write event code to pa_EVENT_TYPEx Register */
 185         val = readl(pa_pmu->base + reg);
 186         val &= ~(PA_EVTYPE_MASK << shift);
 187         val |= (type << shift);
 188         writel(val, pa_pmu->base + reg);
 189 }
 190
 191 static void hisi_pa_pmu_start_counters(struct hisi_pmu *pa_pmu)
 192 {
 193         u32 val;
 194
 195         val = readl(pa_pmu->base + PA_PERF_CTRL);
 196         val |= PA_PERF_CTRL_EN;
 197         writel(val, pa_pmu->base + PA_PERF_CTRL);
 198 }
 199
 200 static void hisi_pa_pmu_stop_counters(struct hisi_pmu *pa_pmu)
 201 {
 202         u32 val;
 203
 204         val = readl(pa_pmu->base + PA_PERF_CTRL);
 205         val &= ~(PA_PERF_CTRL_EN);
 206         writel(val, pa_pmu->base + PA_PERF_CTRL);
 207 }
 208
 209 static void hisi_pa_pmu_enable_counter(struct hisi_pmu *pa_pmu,
 210                                        struct hw_perf_event *hwc)
 211 {
 212         u32 val;
 213
 214         /* Enable counter index in PA_EVENT_CTRL register */
 215         val = readl(pa_pmu->base + PA_EVENT_CTRL);
 216         val |= 1 << hwc->idx;
 217         writel(val, pa_pmu->base + PA_EVENT_CTRL);
 218 }
 219
 220 static void hisi_pa_pmu_disable_counter(struct hisi_pmu *pa_pmu,
 221                                         struct hw_perf_event *hwc)
 222 {
 223         u32 val;
 224
 225         /* Clear counter index in PA_EVENT_CTRL register */
 226         val = readl(pa_pmu->base + PA_EVENT_CTRL);
 227         val &= ~(1 << hwc->idx);
 228         writel(val, pa_pmu->base + PA_EVENT_CTRL);
 229 }
 230
 231 static void hisi_pa_pmu_enable_counter_int(struct hisi_pmu *pa_pmu,
 232                                            struct hw_perf_event *hwc)
 233 {
 234         struct hisi_pa_pmu_int_regs *regs = pa_pmu->dev_info->private;
 235         u32 val;
 236
 237         /* Write 0 to enable interrupt */
 238         val = readl(pa_pmu->base + regs->mask_offset);
 239         val &= ~(1 << hwc->idx);
 240         writel(val, pa_pmu->base + regs->mask_offset);
 241 }
 242
 243 static void hisi_pa_pmu_disable_counter_int(struct hisi_pmu *pa_pmu,
 244                                             struct hw_perf_event *hwc)
 245 {
 246         struct hisi_pa_pmu_int_regs *regs = pa_pmu->dev_info->private;
 247         u32 val;
 248
 249         /* Write 1 to mask interrupt */
 250         val = readl(pa_pmu->base + regs->mask_offset);
 251         val |= 1 << hwc->idx;
 252         writel(val, pa_pmu->base + regs->mask_offset);
 253 }
 254
 255 static u32 hisi_pa_pmu_get_int_status(struct hisi_pmu *pa_pmu)
 256 {
 257         struct hisi_pa_pmu_int_regs *regs = pa_pmu->dev_info->private;
 258
 259         return readl(pa_pmu->base + regs->status_offset);
 260 }
 261
 262 static void hisi_pa_pmu_clear_int_status(struct hisi_pmu *pa_pmu, int idx)
 263 {
 264         struct hisi_pa_pmu_int_regs *regs = pa_pmu->dev_info->private;
 265
 266         writel(1 << idx, pa_pmu->base + regs->clear_offset);
 267 }
 268
 269 static int hisi_pa_pmu_init_data(struct platform_device *pdev,
 270                                    struct hisi_pmu *pa_pmu)
 271 {
 272         /*
 273          * As PA PMU is in a SICL, use the SICL_ID and the index ID
 274          * to identify the PA PMU.
 275          */
 276         if (device_property_read_u32(&pdev->dev, "hisilicon,scl-id",
 277                                      &pa_pmu->sicl_id)) {
 278                 dev_err(&pdev->dev, "Cannot read sicl-id!\n");
 279                 return -EINVAL;
 280         }
 281
 282         if (device_property_read_u32(&pdev->dev, "hisilicon,idx-id",
 283                                      &pa_pmu->index_id)) {
 284                 dev_err(&pdev->dev, "Cannot read idx-id!\n");
 285                 return -EINVAL;
 286         }
 287
 288         pa_pmu->ccl_id = -1;
 289         pa_pmu->sccl_id = -1;
 290
 291         pa_pmu->dev_info = device_get_match_data(&pdev->dev);
 292         if (!pa_pmu->dev_info)
 293                 return -ENODEV;
 294
 295         pa_pmu->base = devm_platform_ioremap_resource(pdev, 0);
 296         if (IS_ERR(pa_pmu->base)) {
 297                 dev_err(&pdev->dev, "ioremap failed for pa_pmu resource.\n");
 298                 return PTR_ERR(pa_pmu->base);
 299         }
 300
 301         pa_pmu->identifier = readl(pa_pmu->base + PA_PMU_VERSION);
 302
 303         return 0;
 304 }
 305
 306 static struct attribute *hisi_pa_pmu_v2_format_attr[] = {
 307         HISI_PMU_FORMAT_ATTR(event, "config:0-7"),
 308         HISI_PMU_FORMAT_ATTR(tgtid_cmd, "config1:0-10"),
 309         HISI_PMU_FORMAT_ATTR(tgtid_msk, "config1:11-21"),
 310         HISI_PMU_FORMAT_ATTR(srcid_cmd, "config1:22-32"),
 311         HISI_PMU_FORMAT_ATTR(srcid_msk, "config1:33-43"),
 312         HISI_PMU_FORMAT_ATTR(tracetag_en, "config1:44"),
 313         NULL,
 314 };
 315
 316 static const struct attribute_group hisi_pa_pmu_v2_format_group = {
 317         .name = "format",
 318         .attrs = hisi_pa_pmu_v2_format_attr,
 319 };
 320
 321 static struct attribute *hisi_pa_pmu_v2_events_attr[] = {
 322         HISI_PMU_EVENT_ATTR(rx_req,             0x40),
 323         HISI_PMU_EVENT_ATTR(tx_req,             0x5c),
 324         HISI_PMU_EVENT_ATTR(cycle,              0x78),
 325         NULL
 326 };
 327
 328 static const struct attribute_group hisi_pa_pmu_v2_events_group = {
 329         .name = "events",
 330         .attrs = hisi_pa_pmu_v2_events_attr,
 331 };
 332
 333 static struct attribute *hisi_pa_pmu_v3_events_attr[] = {
 334         HISI_PMU_EVENT_ATTR(tx_req,     0x0),
 335         HISI_PMU_EVENT_ATTR(tx_dat,     0x1),
 336         HISI_PMU_EVENT_ATTR(tx_snp,     0x2),
 337         HISI_PMU_EVENT_ATTR(rx_req,     0x7),
 338         HISI_PMU_EVENT_ATTR(rx_dat,     0x8),
 339         HISI_PMU_EVENT_ATTR(rx_snp,     0x9),
 340         NULL
 341 };
 342
 343 static const struct attribute_group hisi_pa_pmu_v3_events_group = {
 344         .name = "events",
 345         .attrs = hisi_pa_pmu_v3_events_attr,
 346 };
 347
 348 static struct attribute *hisi_h60pa_pmu_events_attr[] = {
 349         HISI_PMU_EVENT_ATTR(rx_flit,    0x50),
 350         HISI_PMU_EVENT_ATTR(tx_flit,    0x65),
 351         NULL
 352 };
 353
 354 static const struct attribute_group hisi_h60pa_pmu_events_group = {
 355         .name = "events",
 356         .attrs = hisi_h60pa_pmu_events_attr,
 357 };
 358
 359 static DEVICE_ATTR(cpumask, 0444, hisi_cpumask_sysfs_show, NULL);
 360
 361 static struct attribute *hisi_pa_pmu_cpumask_attrs[] = {
 362         &dev_attr_cpumask.attr,
 363         NULL
 364 };
 365
 366 static const struct attribute_group hisi_pa_pmu_cpumask_attr_group = {
 367         .attrs = hisi_pa_pmu_cpumask_attrs,
 368 };
 369
 370 static struct device_attribute hisi_pa_pmu_identifier_attr =
 371         __ATTR(identifier, 0444, hisi_uncore_pmu_identifier_attr_show, NULL);
 372
 373 static struct attribute *hisi_pa_pmu_identifier_attrs[] = {
 374         &hisi_pa_pmu_identifier_attr.attr,
 375         NULL
 376 };
 377
 378 static const struct attribute_group hisi_pa_pmu_identifier_group = {
 379         .attrs = hisi_pa_pmu_identifier_attrs,
 380 };
 381
 382 static struct hisi_pa_pmu_int_regs hisi_pa_pmu_regs = {
 383         .mask_offset = PA_INT_MASK,
 384         .clear_offset = PA_INT_CLEAR,
 385         .status_offset = PA_INT_STATUS,
 386 };
 387
 388 static const struct attribute_group *hisi_pa_pmu_v2_attr_groups[] = {
 389         &hisi_pa_pmu_v2_format_group,
 390         &hisi_pa_pmu_v2_events_group,
 391         &hisi_pa_pmu_cpumask_attr_group,
 392         &hisi_pa_pmu_identifier_group,
 393         NULL
 394 };
 395
 396 static const struct hisi_pmu_dev_info hisi_h32pa_v2 = {
 397         .name = "pa",
 398         .attr_groups = hisi_pa_pmu_v2_attr_groups,
 399         .private = &hisi_pa_pmu_regs,
 400 };
 401
 402 static const struct attribute_group *hisi_pa_pmu_v3_attr_groups[] = {
 403         &hisi_pa_pmu_v2_format_group,
 404         &hisi_pa_pmu_v3_events_group,
 405         &hisi_pa_pmu_cpumask_attr_group,
 406         &hisi_pa_pmu_identifier_group,
 407         NULL
 408 };
 409
 410 static const struct hisi_pmu_dev_info hisi_h32pa_v3 = {
 411         .name = "pa",
 412         .attr_groups = hisi_pa_pmu_v3_attr_groups,
 413         .private = &hisi_pa_pmu_regs,
 414 };
 415
 416 static struct hisi_pa_pmu_int_regs hisi_h60pa_pmu_regs = {
 417         .mask_offset = H60PA_INT_MASK,
 418         .clear_offset = H60PA_INT_STATUS, /* Clear on write */
 419         .status_offset = H60PA_INT_STATUS,
 420 };
 421
 422 static const struct attribute_group *hisi_h60pa_pmu_attr_groups[] = {
 423         &hisi_pa_pmu_v2_format_group,
 424         &hisi_h60pa_pmu_events_group,
 425         &hisi_pa_pmu_cpumask_attr_group,
 426         &hisi_pa_pmu_identifier_group,
 427         NULL
 428 };
 429
 430 static const struct hisi_pmu_dev_info hisi_h60pa = {
 431         .name = "h60pa",
 432         .attr_groups = hisi_h60pa_pmu_attr_groups,
 433         .private = &hisi_h60pa_pmu_regs,
 434 };
 435
 436 static const struct hisi_uncore_ops hisi_uncore_pa_ops = {
 437         .write_evtype           = hisi_pa_pmu_write_evtype,
 438         .get_event_idx          = hisi_uncore_pmu_get_event_idx,
 439         .start_counters         = hisi_pa_pmu_start_counters,
 440         .stop_counters          = hisi_pa_pmu_stop_counters,
 441         .enable_counter         = hisi_pa_pmu_enable_counter,
 442         .disable_counter        = hisi_pa_pmu_disable_counter,
 443         .enable_counter_int     = hisi_pa_pmu_enable_counter_int,
 444         .disable_counter_int    = hisi_pa_pmu_disable_counter_int,
 445         .write_counter          = hisi_pa_pmu_write_counter,
 446         .read_counter           = hisi_pa_pmu_read_counter,
 447         .get_int_status         = hisi_pa_pmu_get_int_status,
 448         .clear_int_status       = hisi_pa_pmu_clear_int_status,
 449         .enable_filter          = hisi_pa_pmu_enable_filter,
 450         .disable_filter         = hisi_pa_pmu_disable_filter,
 451 };
 452
 453 static int hisi_pa_pmu_dev_probe(struct platform_device *pdev,
 454                                  struct hisi_pmu *pa_pmu)
 455 {
 456         int ret;
 457
 458         ret = hisi_pa_pmu_init_data(pdev, pa_pmu);
 459         if (ret)
 460                 return ret;
 461
 462         ret = hisi_uncore_pmu_init_irq(pa_pmu, pdev);
 463         if (ret)
 464                 return ret;
 465
 466         pa_pmu->pmu_events.attr_groups = pa_pmu->dev_info->attr_groups;
 467         pa_pmu->num_counters = PA_NR_COUNTERS;
 468         pa_pmu->ops = &hisi_uncore_pa_ops;
 469         pa_pmu->check_event = 0xB0;
 470         pa_pmu->counter_bits = 64;
 471         pa_pmu->dev = &pdev->dev;
 472         pa_pmu->on_cpu = -1;
 473
 474         return 0;
 475 }
 476
 477 static int hisi_pa_pmu_probe(struct platform_device *pdev)
 478 {
 479         struct hisi_pmu *pa_pmu;
 480         char *name;
 481         int ret;
 482
 483         pa_pmu = devm_kzalloc(&pdev->dev, sizeof(*pa_pmu), GFP_KERNEL);
 484         if (!pa_pmu)
 485                 return -ENOMEM;
 486
 487         ret = hisi_pa_pmu_dev_probe(pdev, pa_pmu);
 488         if (ret)
 489                 return ret;
 490
 491         name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sicl%d_%s%u",
 492                               pa_pmu->sicl_id, pa_pmu->dev_info->name,
 493                               pa_pmu->index_id);
 494         if (!name)
 495                 return -ENOMEM;
 496
 497         ret = cpuhp_state_add_instance(CPUHP_AP_PERF_ARM_HISI_PA_ONLINE,
 498                                        &pa_pmu->node);
 499         if (ret) {
 500                 dev_err(&pdev->dev, "Error %d registering hotplug\n", ret);
 501                 return ret;
 502         }
 503
 504         hisi_pmu_init(pa_pmu, THIS_MODULE);
 505         ret = perf_pmu_register(&pa_pmu->pmu, name, -1);
 506         if (ret) {
 507                 dev_err(pa_pmu->dev, "PMU register failed, ret = %d\n", ret);
 508                 cpuhp_state_remove_instance_nocalls(CPUHP_AP_PERF_ARM_HISI_PA_ONLINE,
 509                                                     &pa_pmu->node);
 510                 return ret;
 511         }
 512
 513         platform_set_drvdata(pdev, pa_pmu);
 514         return ret;
 515 }
 516
 517 static int hisi_pa_pmu_remove(struct platform_device *pdev)
 518 {
 519         struct hisi_pmu *pa_pmu = platform_get_drvdata(pdev);
 520
 521         perf_pmu_unregister(&pa_pmu->pmu);
 522         cpuhp_state_remove_instance_nocalls(CPUHP_AP_PERF_ARM_HISI_PA_ONLINE,
 523                                             &pa_pmu->node);
 524         return 0;
 525 }
 526
 527 static const struct acpi_device_id hisi_pa_pmu_acpi_match[] = {
 528         { "HISI0273", (kernel_ulong_t)&hisi_h32pa_v2 },
 529         { "HISI0275", (kernel_ulong_t)&hisi_h32pa_v3 },
 530         { "HISI0274", (kernel_ulong_t)&hisi_h60pa },
 531         {}
 532 };
 533 MODULE_DEVICE_TABLE(acpi, hisi_pa_pmu_acpi_match);
 534
 535 static struct platform_driver hisi_pa_pmu_driver = {
 536         .driver = {
 537                 .name = "hisi_pa_pmu",
 538                 .acpi_match_table = hisi_pa_pmu_acpi_match,
 539                 .suppress_bind_attrs = true,
 540         },
 541         .probe = hisi_pa_pmu_probe,
 542         .remove = hisi_pa_pmu_remove,
 543 };
 544
 545 static int __init hisi_pa_pmu_module_init(void)
 546 {
 547         int ret;
 548
 549         ret = cpuhp_setup_state_multi(CPUHP_AP_PERF_ARM_HISI_PA_ONLINE,
 550                                       "AP_PERF_ARM_HISI_PA_ONLINE",
 551                                       hisi_uncore_pmu_online_cpu,
 552                                       hisi_uncore_pmu_offline_cpu);
 553         if (ret) {
 554                 pr_err("PA PMU: cpuhp state setup failed, ret = %d\n", ret);
 555                 return ret;
 556         }
 557
 558         ret = platform_driver_register(&hisi_pa_pmu_driver);
 559         if (ret)
 560                 cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_HISI_PA_ONLINE);
 561
 562         return ret;
 563 }
 564 module_init(hisi_pa_pmu_module_init);
 565
 566 static void __exit hisi_pa_pmu_module_exit(void)
 567 {
 568         platform_driver_unregister(&hisi_pa_pmu_driver);
 569         cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_HISI_PA_ONLINE);
 570 }
 571 module_exit(hisi_pa_pmu_module_exit);
 572
 573 MODULE_DESCRIPTION("HiSilicon Protocol Adapter uncore PMU driver");
 574 MODULE_LICENSE("GPL v2");
 575 MODULE_AUTHOR("Shaokun Zhang <zhangshaokun@hisilicon.com>");
 576 MODULE_AUTHOR("Qi Liu <liuqi115@huawei.com>");