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>"); 577