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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * HiSilicon PA uncore Hardware event counters support4 *5 * Copyright (C) 2020 HiSilicon Limited6 * 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			0x1c0021#define PA_EVENT_CTRL			0x1c0422#define PA_TT_CTRL			0x1c0823#define PA_TGTID_CTRL			0x1c1424#define PA_SRCID_CTRL			0x1c1825 26/* H32 PA interrupt registers */27#define PA_INT_MASK			0x1c7028#define PA_INT_STATUS			0x1c7829#define PA_INT_CLEAR			0x1c7c30 31#define H60PA_INT_STATUS		0x1c7032#define H60PA_INT_MASK			0x1c7433 34#define PA_EVENT_TYPE0			0x1c8035#define PA_PMU_VERSION			0x1cf036#define PA_EVENT_CNT0_L			0x1d0037 38#define PA_EVTYPE_MASK			0xff39#define PA_NR_COUNTERS			0x840#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			045#define PA_SRCID_NONE			046#define PA_TGTID_MSK_SHIFT		1247#define PA_SRCID_MSK_SHIFT		1248 49HISI_PMU_EVENT_ATTR_EXTRACTOR(tgtid_cmd, config1, 10, 0);50HISI_PMU_EVENT_ATTR_EXTRACTOR(tgtid_msk, config1, 21, 11);51HISI_PMU_EVENT_ATTR_EXTRACTOR(srcid_cmd, config1, 32, 22);52HISI_PMU_EVENT_ATTR_EXTRACTOR(srcid_msk, config1, 43, 33);53HISI_PMU_EVENT_ATTR_EXTRACTOR(tracetag_en, config1, 44, 44);54 55struct hisi_pa_pmu_int_regs {56	u32 mask_offset;57	u32 clear_offset;58	u32 status_offset;59};60 61static 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 75static 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 89static 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 102static 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 111static 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 124static 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 133static 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 142static 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 151static u32 hisi_pa_pmu_get_counter_offset(int idx)152{153	return (PA_EVENT_CNT0_L + idx * 8);154}155 156static 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 162static 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 168static 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 191static 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 200static 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 209static 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 220static 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 231static 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 243static 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 255static 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 262static 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 269static 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 ID274	 * 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 306static 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 316static const struct attribute_group hisi_pa_pmu_v2_format_group = {317	.name = "format",318	.attrs = hisi_pa_pmu_v2_format_attr,319};320 321static 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	NULL326};327 328static const struct attribute_group hisi_pa_pmu_v2_events_group = {329	.name = "events",330	.attrs = hisi_pa_pmu_v2_events_attr,331};332 333static 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	NULL341};342 343static const struct attribute_group hisi_pa_pmu_v3_events_group = {344	.name = "events",345	.attrs = hisi_pa_pmu_v3_events_attr,346};347 348static struct attribute *hisi_h60pa_pmu_events_attr[] = {349	HISI_PMU_EVENT_ATTR(rx_flit,	0x50),350	HISI_PMU_EVENT_ATTR(tx_flit,	0x65),351	NULL352};353 354static const struct attribute_group hisi_h60pa_pmu_events_group = {355	.name = "events",356	.attrs = hisi_h60pa_pmu_events_attr,357};358 359static DEVICE_ATTR(cpumask, 0444, hisi_cpumask_sysfs_show, NULL);360 361static struct attribute *hisi_pa_pmu_cpumask_attrs[] = {362	&dev_attr_cpumask.attr,363	NULL364};365 366static const struct attribute_group hisi_pa_pmu_cpumask_attr_group = {367	.attrs = hisi_pa_pmu_cpumask_attrs,368};369 370static struct device_attribute hisi_pa_pmu_identifier_attr =371	__ATTR(identifier, 0444, hisi_uncore_pmu_identifier_attr_show, NULL);372 373static struct attribute *hisi_pa_pmu_identifier_attrs[] = {374	&hisi_pa_pmu_identifier_attr.attr,375	NULL376};377 378static const struct attribute_group hisi_pa_pmu_identifier_group = {379	.attrs = hisi_pa_pmu_identifier_attrs,380};381 382static 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 388static 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	NULL394};395 396static 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 402static 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	NULL408};409 410static 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 416static 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 422static 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	NULL428};429 430static 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 436static 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 453static 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 477static 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 517static void 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}525 526static const struct acpi_device_id hisi_pa_pmu_acpi_match[] = {527	{ "HISI0273", (kernel_ulong_t)&hisi_h32pa_v2 },528	{ "HISI0275", (kernel_ulong_t)&hisi_h32pa_v3 },529	{ "HISI0274", (kernel_ulong_t)&hisi_h60pa },530	{}531};532MODULE_DEVICE_TABLE(acpi, hisi_pa_pmu_acpi_match);533 534static struct platform_driver hisi_pa_pmu_driver = {535	.driver = {536		.name = "hisi_pa_pmu",537		.acpi_match_table = hisi_pa_pmu_acpi_match,538		.suppress_bind_attrs = true,539	},540	.probe = hisi_pa_pmu_probe,541	.remove_new = hisi_pa_pmu_remove,542};543 544static int __init hisi_pa_pmu_module_init(void)545{546	int ret;547 548	ret = cpuhp_setup_state_multi(CPUHP_AP_PERF_ARM_HISI_PA_ONLINE,549				      "AP_PERF_ARM_HISI_PA_ONLINE",550				      hisi_uncore_pmu_online_cpu,551				      hisi_uncore_pmu_offline_cpu);552	if (ret) {553		pr_err("PA PMU: cpuhp state setup failed, ret = %d\n", ret);554		return ret;555	}556 557	ret = platform_driver_register(&hisi_pa_pmu_driver);558	if (ret)559		cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_HISI_PA_ONLINE);560 561	return ret;562}563module_init(hisi_pa_pmu_module_init);564 565static void __exit hisi_pa_pmu_module_exit(void)566{567	platform_driver_unregister(&hisi_pa_pmu_driver);568	cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_HISI_PA_ONLINE);569}570module_exit(hisi_pa_pmu_module_exit);571 572MODULE_DESCRIPTION("HiSilicon Protocol Adapter uncore PMU driver");573MODULE_LICENSE("GPL v2");574MODULE_AUTHOR("Shaokun Zhang <zhangshaokun@hisilicon.com>");575MODULE_AUTHOR("Qi Liu <liuqi115@huawei.com>");576