diff options
Diffstat (limited to 'drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c')
| -rw-r--r-- | drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c | 530 |
1 files changed, 530 insertions, 0 deletions
diff --git a/drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c b/drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c new file mode 100644 index 000000000000..46be312fa126 --- /dev/null +++ b/drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c @@ -0,0 +1,530 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * HiSilicon SLLC uncore Hardware event counters support + * + * Copyright (C) 2020 Hisilicon Limited + * Author: Shaokun Zhang <zhangshaokun@hisilicon.com> + * + * This code is based on the uncore PMUs like arm-cci and arm-ccn. + */ +#include <linux/acpi.h> +#include <linux/cpuhotplug.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/list.h> +#include <linux/smp.h> + +#include "hisi_uncore_pmu.h" + +/* SLLC register definition */ +#define SLLC_INT_MASK 0x0814 +#define SLLC_INT_STATUS 0x0818 +#define SLLC_INT_CLEAR 0x081c +#define SLLC_PERF_CTRL 0x1c00 +#define SLLC_SRCID_CTRL 0x1c04 +#define SLLC_TGTID_CTRL 0x1c08 +#define SLLC_EVENT_CTRL 0x1c14 +#define SLLC_EVENT_TYPE0 0x1c18 +#define SLLC_VERSION 0x1cf0 +#define SLLC_EVENT_CNT0_L 0x1d00 + +#define SLLC_EVTYPE_MASK 0xff +#define SLLC_PERF_CTRL_EN BIT(0) +#define SLLC_FILT_EN BIT(1) +#define SLLC_TRACETAG_EN BIT(2) +#define SLLC_SRCID_EN BIT(4) +#define SLLC_SRCID_NONE 0x0 +#define SLLC_TGTID_EN BIT(5) +#define SLLC_TGTID_NONE 0x0 +#define SLLC_TGTID_MIN_SHIFT 1 +#define SLLC_TGTID_MAX_SHIFT 12 +#define SLLC_SRCID_CMD_SHIFT 1 +#define SLLC_SRCID_MSK_SHIFT 12 +#define SLLC_NR_EVENTS 0x80 + +HISI_PMU_EVENT_ATTR_EXTRACTOR(tgtid_min, config1, 10, 0); +HISI_PMU_EVENT_ATTR_EXTRACTOR(tgtid_max, config1, 21, 11); +HISI_PMU_EVENT_ATTR_EXTRACTOR(srcid_cmd, config1, 32, 22); +HISI_PMU_EVENT_ATTR_EXTRACTOR(srcid_msk, config1, 43, 33); +HISI_PMU_EVENT_ATTR_EXTRACTOR(tracetag_en, config1, 44, 44); + +static bool tgtid_is_valid(u32 max, u32 min) +{ + return max > 0 && max >= min; +} + +static void hisi_sllc_pmu_enable_tracetag(struct perf_event *event) +{ + struct hisi_pmu *sllc_pmu = to_hisi_pmu(event->pmu); + u32 tt_en = hisi_get_tracetag_en(event); + + if (tt_en) { + u32 val; + + val = readl(sllc_pmu->base + SLLC_PERF_CTRL); + val |= SLLC_TRACETAG_EN | SLLC_FILT_EN; + writel(val, sllc_pmu->base + SLLC_PERF_CTRL); + } +} + +static void hisi_sllc_pmu_disable_tracetag(struct perf_event *event) +{ + struct hisi_pmu *sllc_pmu = to_hisi_pmu(event->pmu); + u32 tt_en = hisi_get_tracetag_en(event); + + if (tt_en) { + u32 val; + + val = readl(sllc_pmu->base + SLLC_PERF_CTRL); + val &= ~(SLLC_TRACETAG_EN | SLLC_FILT_EN); + writel(val, sllc_pmu->base + SLLC_PERF_CTRL); + } +} + +static void hisi_sllc_pmu_config_tgtid(struct perf_event *event) +{ + struct hisi_pmu *sllc_pmu = to_hisi_pmu(event->pmu); + u32 min = hisi_get_tgtid_min(event); + u32 max = hisi_get_tgtid_max(event); + + if (tgtid_is_valid(max, min)) { + u32 val = (max << SLLC_TGTID_MAX_SHIFT) | (min << SLLC_TGTID_MIN_SHIFT); + + writel(val, sllc_pmu->base + SLLC_TGTID_CTRL); + /* Enable the tgtid */ + val = readl(sllc_pmu->base + SLLC_PERF_CTRL); + val |= SLLC_TGTID_EN | SLLC_FILT_EN; + writel(val, sllc_pmu->base + SLLC_PERF_CTRL); + } +} + +static void hisi_sllc_pmu_clear_tgtid(struct perf_event *event) +{ + struct hisi_pmu *sllc_pmu = to_hisi_pmu(event->pmu); + u32 min = hisi_get_tgtid_min(event); + u32 max = hisi_get_tgtid_max(event); + + if (tgtid_is_valid(max, min)) { + u32 val; + + writel(SLLC_TGTID_NONE, sllc_pmu->base + SLLC_TGTID_CTRL); + /* Disable the tgtid */ + val = readl(sllc_pmu->base + SLLC_PERF_CTRL); + val &= ~(SLLC_TGTID_EN | SLLC_FILT_EN); + writel(val, sllc_pmu->base + SLLC_PERF_CTRL); + } +} + +static void hisi_sllc_pmu_config_srcid(struct perf_event *event) +{ + struct hisi_pmu *sllc_pmu = to_hisi_pmu(event->pmu); + u32 cmd = hisi_get_srcid_cmd(event); + + if (cmd) { + u32 val, msk; + + msk = hisi_get_srcid_msk(event); + val = (cmd << SLLC_SRCID_CMD_SHIFT) | (msk << SLLC_SRCID_MSK_SHIFT); + writel(val, sllc_pmu->base + SLLC_SRCID_CTRL); + /* Enable the srcid */ + val = readl(sllc_pmu->base + SLLC_PERF_CTRL); + val |= SLLC_SRCID_EN | SLLC_FILT_EN; + writel(val, sllc_pmu->base + SLLC_PERF_CTRL); + } +} + +static void hisi_sllc_pmu_clear_srcid(struct perf_event *event) +{ + struct hisi_pmu *sllc_pmu = to_hisi_pmu(event->pmu); + u32 cmd = hisi_get_srcid_cmd(event); + + if (cmd) { + u32 val; + + writel(SLLC_SRCID_NONE, sllc_pmu->base + SLLC_SRCID_CTRL); + /* Disable the srcid */ + val = readl(sllc_pmu->base + SLLC_PERF_CTRL); + val &= ~(SLLC_SRCID_EN | SLLC_FILT_EN); + writel(val, sllc_pmu->base + SLLC_PERF_CTRL); + } +} + +static void hisi_sllc_pmu_enable_filter(struct perf_event *event) +{ + if (event->attr.config1 != 0x0) { + hisi_sllc_pmu_enable_tracetag(event); + hisi_sllc_pmu_config_srcid(event); + hisi_sllc_pmu_config_tgtid(event); + } +} + +static void hisi_sllc_pmu_clear_filter(struct perf_event *event) +{ + if (event->attr.config1 != 0x0) { + hisi_sllc_pmu_disable_tracetag(event); + hisi_sllc_pmu_clear_srcid(event); + hisi_sllc_pmu_clear_tgtid(event); + } +} + +static u32 hisi_sllc_pmu_get_counter_offset(int idx) +{ + return (SLLC_EVENT_CNT0_L + idx * 8); +} + +static u64 hisi_sllc_pmu_read_counter(struct hisi_pmu *sllc_pmu, + struct hw_perf_event *hwc) +{ + return readq(sllc_pmu->base + + hisi_sllc_pmu_get_counter_offset(hwc->idx)); +} + +static void hisi_sllc_pmu_write_counter(struct hisi_pmu *sllc_pmu, + struct hw_perf_event *hwc, u64 val) +{ + writeq(val, sllc_pmu->base + + hisi_sllc_pmu_get_counter_offset(hwc->idx)); +} + +static void hisi_sllc_pmu_write_evtype(struct hisi_pmu *sllc_pmu, int idx, + u32 type) +{ + u32 reg, reg_idx, shift, val; + + /* + * Select the appropriate event select register(SLLC_EVENT_TYPE0/1). + * There are 2 event select registers for the 8 hardware counters. + * Event code is 8-bits and for the former 4 hardware counters, + * SLLC_EVENT_TYPE0 is chosen. For the latter 4 hardware counters, + * SLLC_EVENT_TYPE1 is chosen. + */ + reg = SLLC_EVENT_TYPE0 + (idx / 4) * 4; + reg_idx = idx % 4; + shift = 8 * reg_idx; + + /* Write event code to SLLC_EVENT_TYPEx Register */ + val = readl(sllc_pmu->base + reg); + val &= ~(SLLC_EVTYPE_MASK << shift); + val |= (type << shift); + writel(val, sllc_pmu->base + reg); +} + +static void hisi_sllc_pmu_start_counters(struct hisi_pmu *sllc_pmu) +{ + u32 val; + + val = readl(sllc_pmu->base + SLLC_PERF_CTRL); + val |= SLLC_PERF_CTRL_EN; + writel(val, sllc_pmu->base + SLLC_PERF_CTRL); +} + +static void hisi_sllc_pmu_stop_counters(struct hisi_pmu *sllc_pmu) +{ + u32 val; + + val = readl(sllc_pmu->base + SLLC_PERF_CTRL); + val &= ~(SLLC_PERF_CTRL_EN); + writel(val, sllc_pmu->base + SLLC_PERF_CTRL); +} + +static void hisi_sllc_pmu_enable_counter(struct hisi_pmu *sllc_pmu, + struct hw_perf_event *hwc) +{ + u32 val; + + val = readl(sllc_pmu->base + SLLC_EVENT_CTRL); + val |= 1 << hwc->idx; + writel(val, sllc_pmu->base + SLLC_EVENT_CTRL); +} + +static void hisi_sllc_pmu_disable_counter(struct hisi_pmu *sllc_pmu, + struct hw_perf_event *hwc) +{ + u32 val; + + val = readl(sllc_pmu->base + SLLC_EVENT_CTRL); + val &= ~(1 << hwc->idx); + writel(val, sllc_pmu->base + SLLC_EVENT_CTRL); +} + +static void hisi_sllc_pmu_enable_counter_int(struct hisi_pmu *sllc_pmu, + struct hw_perf_event *hwc) +{ + u32 val; + + val = readl(sllc_pmu->base + SLLC_INT_MASK); + /* Write 0 to enable interrupt */ + val &= ~(1 << hwc->idx); + writel(val, sllc_pmu->base + SLLC_INT_MASK); +} + +static void hisi_sllc_pmu_disable_counter_int(struct hisi_pmu *sllc_pmu, + struct hw_perf_event *hwc) +{ + u32 val; + + val = readl(sllc_pmu->base + SLLC_INT_MASK); + /* Write 1 to mask interrupt */ + val |= 1 << hwc->idx; + writel(val, sllc_pmu->base + SLLC_INT_MASK); +} + +static u32 hisi_sllc_pmu_get_int_status(struct hisi_pmu *sllc_pmu) +{ + return readl(sllc_pmu->base + SLLC_INT_STATUS); +} + +static void hisi_sllc_pmu_clear_int_status(struct hisi_pmu *sllc_pmu, int idx) +{ + writel(1 << idx, sllc_pmu->base + SLLC_INT_CLEAR); +} + +static const struct acpi_device_id hisi_sllc_pmu_acpi_match[] = { + { "HISI0263", }, + {} +}; +MODULE_DEVICE_TABLE(acpi, hisi_sllc_pmu_acpi_match); + +static int hisi_sllc_pmu_init_data(struct platform_device *pdev, + struct hisi_pmu *sllc_pmu) +{ + /* + * Use the SCCL_ID and the index ID to identify the SLLC PMU, + * while SCCL_ID is from MPIDR_EL1 by CPU. + */ + if (device_property_read_u32(&pdev->dev, "hisilicon,scl-id", + &sllc_pmu->sccl_id)) { + dev_err(&pdev->dev, "Cannot read sccl-id!\n"); + return -EINVAL; + } + + if (device_property_read_u32(&pdev->dev, "hisilicon,idx-id", + &sllc_pmu->index_id)) { + dev_err(&pdev->dev, "Cannot read idx-id!\n"); + return -EINVAL; + } + + /* SLLC PMUs only share the same SCCL */ + sllc_pmu->ccl_id = -1; + + sllc_pmu->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(sllc_pmu->base)) { + dev_err(&pdev->dev, "ioremap failed for sllc_pmu resource.\n"); + return PTR_ERR(sllc_pmu->base); + } + + sllc_pmu->identifier = readl(sllc_pmu->base + SLLC_VERSION); + + return 0; +} + +static struct attribute *hisi_sllc_pmu_v2_format_attr[] = { + HISI_PMU_FORMAT_ATTR(event, "config:0-7"), + HISI_PMU_FORMAT_ATTR(tgtid_min, "config1:0-10"), + HISI_PMU_FORMAT_ATTR(tgtid_max, "config1:11-21"), + HISI_PMU_FORMAT_ATTR(srcid_cmd, "config1:22-32"), + HISI_PMU_FORMAT_ATTR(srcid_msk, "config1:33-43"), + HISI_PMU_FORMAT_ATTR(tracetag_en, "config1:44"), + NULL +}; + +static const struct attribute_group hisi_sllc_pmu_v2_format_group = { + .name = "format", + .attrs = hisi_sllc_pmu_v2_format_attr, +}; + +static struct attribute *hisi_sllc_pmu_v2_events_attr[] = { + HISI_PMU_EVENT_ATTR(rx_req, 0x30), + HISI_PMU_EVENT_ATTR(rx_data, 0x31), + HISI_PMU_EVENT_ATTR(tx_req, 0x34), + HISI_PMU_EVENT_ATTR(tx_data, 0x35), + HISI_PMU_EVENT_ATTR(cycles, 0x09), + NULL +}; + +static const struct attribute_group hisi_sllc_pmu_v2_events_group = { + .name = "events", + .attrs = hisi_sllc_pmu_v2_events_attr, +}; + +static DEVICE_ATTR(cpumask, 0444, hisi_cpumask_sysfs_show, NULL); + +static struct attribute *hisi_sllc_pmu_cpumask_attrs[] = { + &dev_attr_cpumask.attr, + NULL +}; + +static const struct attribute_group hisi_sllc_pmu_cpumask_attr_group = { + .attrs = hisi_sllc_pmu_cpumask_attrs, +}; + +static struct device_attribute hisi_sllc_pmu_identifier_attr = + __ATTR(identifier, 0444, hisi_uncore_pmu_identifier_attr_show, NULL); + +static struct attribute *hisi_sllc_pmu_identifier_attrs[] = { + &hisi_sllc_pmu_identifier_attr.attr, + NULL +}; + +static struct attribute_group hisi_sllc_pmu_identifier_group = { + .attrs = hisi_sllc_pmu_identifier_attrs, +}; + +static const struct attribute_group *hisi_sllc_pmu_v2_attr_groups[] = { + &hisi_sllc_pmu_v2_format_group, + &hisi_sllc_pmu_v2_events_group, + &hisi_sllc_pmu_cpumask_attr_group, + &hisi_sllc_pmu_identifier_group, + NULL +}; + +static const struct hisi_uncore_ops hisi_uncore_sllc_ops = { + .write_evtype = hisi_sllc_pmu_write_evtype, + .get_event_idx = hisi_uncore_pmu_get_event_idx, + .start_counters = hisi_sllc_pmu_start_counters, + .stop_counters = hisi_sllc_pmu_stop_counters, + .enable_counter = hisi_sllc_pmu_enable_counter, + .disable_counter = hisi_sllc_pmu_disable_counter, + .enable_counter_int = hisi_sllc_pmu_enable_counter_int, + .disable_counter_int = hisi_sllc_pmu_disable_counter_int, + .write_counter = hisi_sllc_pmu_write_counter, + .read_counter = hisi_sllc_pmu_read_counter, + .get_int_status = hisi_sllc_pmu_get_int_status, + .clear_int_status = hisi_sllc_pmu_clear_int_status, + .enable_filter = hisi_sllc_pmu_enable_filter, + .disable_filter = hisi_sllc_pmu_clear_filter, +}; + +static int hisi_sllc_pmu_dev_probe(struct platform_device *pdev, + struct hisi_pmu *sllc_pmu) +{ + int ret; + + ret = hisi_sllc_pmu_init_data(pdev, sllc_pmu); + if (ret) + return ret; + + ret = hisi_uncore_pmu_init_irq(sllc_pmu, pdev); + if (ret) + return ret; + + sllc_pmu->pmu_events.attr_groups = hisi_sllc_pmu_v2_attr_groups; + sllc_pmu->ops = &hisi_uncore_sllc_ops; + sllc_pmu->check_event = SLLC_NR_EVENTS; + sllc_pmu->counter_bits = 64; + sllc_pmu->num_counters = 8; + sllc_pmu->dev = &pdev->dev; + sllc_pmu->on_cpu = -1; + + return 0; +} + +static int hisi_sllc_pmu_probe(struct platform_device *pdev) +{ + struct hisi_pmu *sllc_pmu; + char *name; + int ret; + + sllc_pmu = devm_kzalloc(&pdev->dev, sizeof(*sllc_pmu), GFP_KERNEL); + if (!sllc_pmu) + return -ENOMEM; + + ret = hisi_sllc_pmu_dev_probe(pdev, sllc_pmu); + if (ret) + return ret; + + name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sccl%u_sllc%u", + sllc_pmu->sccl_id, sllc_pmu->index_id); + if (!name) + return -ENOMEM; + + ret = cpuhp_state_add_instance(CPUHP_AP_PERF_ARM_HISI_SLLC_ONLINE, + &sllc_pmu->node); + if (ret) { + dev_err(&pdev->dev, "Error %d registering hotplug\n", ret); + return ret; + } + + sllc_pmu->pmu = (struct pmu) { + .module = THIS_MODULE, + .task_ctx_nr = perf_invalid_context, + .event_init = hisi_uncore_pmu_event_init, + .pmu_enable = hisi_uncore_pmu_enable, + .pmu_disable = hisi_uncore_pmu_disable, + .add = hisi_uncore_pmu_add, + .del = hisi_uncore_pmu_del, + .start = hisi_uncore_pmu_start, + .stop = hisi_uncore_pmu_stop, + .read = hisi_uncore_pmu_read, + .attr_groups = sllc_pmu->pmu_events.attr_groups, + .capabilities = PERF_PMU_CAP_NO_EXCLUDE, + }; + + ret = perf_pmu_register(&sllc_pmu->pmu, name, -1); + if (ret) { + dev_err(sllc_pmu->dev, "PMU register failed, ret = %d\n", ret); + cpuhp_state_remove_instance(CPUHP_AP_PERF_ARM_HISI_SLLC_ONLINE, + &sllc_pmu->node); + irq_set_affinity_hint(sllc_pmu->irq, NULL); + return ret; + } + + platform_set_drvdata(pdev, sllc_pmu); + + return ret; +} + +static int hisi_sllc_pmu_remove(struct platform_device *pdev) +{ + struct hisi_pmu *sllc_pmu = platform_get_drvdata(pdev); + + perf_pmu_unregister(&sllc_pmu->pmu); + cpuhp_state_remove_instance_nocalls(CPUHP_AP_PERF_ARM_HISI_SLLC_ONLINE, + &sllc_pmu->node); + irq_set_affinity_hint(sllc_pmu->irq, NULL); + + return 0; +} + +static struct platform_driver hisi_sllc_pmu_driver = { + .driver = { + .name = "hisi_sllc_pmu", + .acpi_match_table = hisi_sllc_pmu_acpi_match, + .suppress_bind_attrs = true, + }, + .probe = hisi_sllc_pmu_probe, + .remove = hisi_sllc_pmu_remove, +}; + +static int __init hisi_sllc_pmu_module_init(void) +{ + int ret; + + ret = cpuhp_setup_state_multi(CPUHP_AP_PERF_ARM_HISI_SLLC_ONLINE, + "AP_PERF_ARM_HISI_SLLC_ONLINE", + hisi_uncore_pmu_online_cpu, + hisi_uncore_pmu_offline_cpu); + if (ret) { + pr_err("SLLC PMU: cpuhp state setup failed, ret = %d\n", ret); + return ret; + } + + ret = platform_driver_register(&hisi_sllc_pmu_driver); + if (ret) + cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_HISI_SLLC_ONLINE); + + return ret; +} +module_init(hisi_sllc_pmu_module_init); + +static void __exit hisi_sllc_pmu_module_exit(void) +{ + platform_driver_unregister(&hisi_sllc_pmu_driver); + cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_HISI_SLLC_ONLINE); +} +module_exit(hisi_sllc_pmu_module_exit); + +MODULE_DESCRIPTION("HiSilicon SLLC uncore PMU driver"); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Shaokun Zhang <zhangshaokun@hisilicon.com>"); +MODULE_AUTHOR("Qi Liu <liuqi115@huawei.com>"); |