diff options
Diffstat (limited to 'drivers/perf/hisilicon/hisi_uncore_uc_pmu.c')
| -rw-r--r-- | drivers/perf/hisilicon/hisi_uncore_uc_pmu.c | 578 |
1 files changed, 578 insertions, 0 deletions
diff --git a/drivers/perf/hisilicon/hisi_uncore_uc_pmu.c b/drivers/perf/hisilicon/hisi_uncore_uc_pmu.c new file mode 100644 index 000000000000..63da05e5831c --- /dev/null +++ b/drivers/perf/hisilicon/hisi_uncore_uc_pmu.c @@ -0,0 +1,578 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * HiSilicon SoC UC (unified cache) uncore Hardware event counters support + * + * Copyright (C) 2023 HiSilicon Limited + * + * This code is based on the uncore PMUs like hisi_uncore_l3c_pmu. + */ +#include <linux/cpuhotplug.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/list.h> +#include <linux/mod_devicetable.h> +#include <linux/property.h> + +#include "hisi_uncore_pmu.h" + +/* Dynamic CPU hotplug state used by UC PMU */ +static enum cpuhp_state hisi_uc_pmu_online; + +/* UC register definition */ +#define HISI_UC_INT_MASK_REG 0x0800 +#define HISI_UC_INT_STS_REG 0x0808 +#define HISI_UC_INT_CLEAR_REG 0x080c +#define HISI_UC_TRACETAG_CTRL_REG 0x1b2c +#define HISI_UC_TRACETAG_REQ_MSK GENMASK(9, 7) +#define HISI_UC_TRACETAG_MARK_EN BIT(0) +#define HISI_UC_TRACETAG_REQ_EN (HISI_UC_TRACETAG_MARK_EN | BIT(2)) +#define HISI_UC_TRACETAG_SRCID_EN BIT(3) +#define HISI_UC_SRCID_CTRL_REG 0x1b40 +#define HISI_UC_SRCID_MSK GENMASK(14, 1) +#define HISI_UC_EVENT_CTRL_REG 0x1c00 +#define HISI_UC_EVENT_TRACETAG_EN BIT(29) +#define HISI_UC_EVENT_URING_MSK GENMASK(28, 27) +#define HISI_UC_EVENT_GLB_EN BIT(26) +#define HISI_UC_VERSION_REG 0x1cf0 +#define HISI_UC_EVTYPE_REGn(n) (0x1d00 + (n) * 4) +#define HISI_UC_EVTYPE_MASK GENMASK(7, 0) +#define HISI_UC_CNTR_REGn(n) (0x1e00 + (n) * 8) + +#define HISI_UC_NR_COUNTERS 0x8 +#define HISI_UC_V2_NR_EVENTS 0xFF +#define HISI_UC_CNTR_REG_BITS 64 + +#define HISI_UC_RD_REQ_TRACETAG 0x4 +#define HISI_UC_URING_EVENT_MIN 0x47 +#define HISI_UC_URING_EVENT_MAX 0x59 + +HISI_PMU_EVENT_ATTR_EXTRACTOR(rd_req_en, config1, 0, 0); +HISI_PMU_EVENT_ATTR_EXTRACTOR(uring_channel, config1, 5, 4); +HISI_PMU_EVENT_ATTR_EXTRACTOR(srcid, config1, 19, 6); +HISI_PMU_EVENT_ATTR_EXTRACTOR(srcid_en, config1, 20, 20); + +static int hisi_uc_pmu_check_filter(struct perf_event *event) +{ + struct hisi_pmu *uc_pmu = to_hisi_pmu(event->pmu); + + if (hisi_get_srcid_en(event) && !hisi_get_rd_req_en(event)) { + dev_err(uc_pmu->dev, + "rcid_en depends on rd_req_en being enabled!\n"); + return -EINVAL; + } + + if (!hisi_get_uring_channel(event)) + return 0; + + if ((HISI_GET_EVENTID(event) < HISI_UC_URING_EVENT_MIN) || + (HISI_GET_EVENTID(event) > HISI_UC_URING_EVENT_MAX)) + dev_warn(uc_pmu->dev, + "Only events: [%#x ~ %#x] support channel filtering!", + HISI_UC_URING_EVENT_MIN, HISI_UC_URING_EVENT_MAX); + + return 0; +} + +static void hisi_uc_pmu_config_req_tracetag(struct perf_event *event) +{ + struct hisi_pmu *uc_pmu = to_hisi_pmu(event->pmu); + u32 val; + + if (!hisi_get_rd_req_en(event)) + return; + + val = readl(uc_pmu->base + HISI_UC_TRACETAG_CTRL_REG); + + /* The request-type has been configured */ + if (FIELD_GET(HISI_UC_TRACETAG_REQ_MSK, val) == HISI_UC_RD_REQ_TRACETAG) + return; + + /* Set request-type for tracetag, only read request is supported! */ + val &= ~HISI_UC_TRACETAG_REQ_MSK; + val |= FIELD_PREP(HISI_UC_TRACETAG_REQ_MSK, HISI_UC_RD_REQ_TRACETAG); + val |= HISI_UC_TRACETAG_REQ_EN; + writel(val, uc_pmu->base + HISI_UC_TRACETAG_CTRL_REG); +} + +static void hisi_uc_pmu_clear_req_tracetag(struct perf_event *event) +{ + struct hisi_pmu *uc_pmu = to_hisi_pmu(event->pmu); + u32 val; + + if (!hisi_get_rd_req_en(event)) + return; + + val = readl(uc_pmu->base + HISI_UC_TRACETAG_CTRL_REG); + + /* Do nothing, the request-type tracetag has been cleaned up */ + if (FIELD_GET(HISI_UC_TRACETAG_REQ_MSK, val) == 0) + return; + + /* Clear request-type */ + val &= ~HISI_UC_TRACETAG_REQ_MSK; + val &= ~HISI_UC_TRACETAG_REQ_EN; + writel(val, uc_pmu->base + HISI_UC_TRACETAG_CTRL_REG); +} + +static void hisi_uc_pmu_config_srcid_tracetag(struct perf_event *event) +{ + struct hisi_pmu *uc_pmu = to_hisi_pmu(event->pmu); + u32 val; + + if (!hisi_get_srcid_en(event)) + return; + + val = readl(uc_pmu->base + HISI_UC_TRACETAG_CTRL_REG); + + /* Do nothing, the source id has been configured */ + if (FIELD_GET(HISI_UC_TRACETAG_SRCID_EN, val)) + return; + + /* Enable source id tracetag */ + val |= HISI_UC_TRACETAG_SRCID_EN; + writel(val, uc_pmu->base + HISI_UC_TRACETAG_CTRL_REG); + + val = readl(uc_pmu->base + HISI_UC_SRCID_CTRL_REG); + val &= ~HISI_UC_SRCID_MSK; + val |= FIELD_PREP(HISI_UC_SRCID_MSK, hisi_get_srcid(event)); + writel(val, uc_pmu->base + HISI_UC_SRCID_CTRL_REG); + + /* Depend on request-type tracetag enabled */ + hisi_uc_pmu_config_req_tracetag(event); +} + +static void hisi_uc_pmu_clear_srcid_tracetag(struct perf_event *event) +{ + struct hisi_pmu *uc_pmu = to_hisi_pmu(event->pmu); + u32 val; + + if (!hisi_get_srcid_en(event)) + return; + + val = readl(uc_pmu->base + HISI_UC_TRACETAG_CTRL_REG); + + /* Do nothing, the source id has been cleaned up */ + if (FIELD_GET(HISI_UC_TRACETAG_SRCID_EN, val) == 0) + return; + + hisi_uc_pmu_clear_req_tracetag(event); + + /* Disable source id tracetag */ + val &= ~HISI_UC_TRACETAG_SRCID_EN; + writel(val, uc_pmu->base + HISI_UC_TRACETAG_CTRL_REG); + + val = readl(uc_pmu->base + HISI_UC_SRCID_CTRL_REG); + val &= ~HISI_UC_SRCID_MSK; + writel(val, uc_pmu->base + HISI_UC_SRCID_CTRL_REG); +} + +static void hisi_uc_pmu_config_uring_channel(struct perf_event *event) +{ + struct hisi_pmu *uc_pmu = to_hisi_pmu(event->pmu); + u32 uring_channel = hisi_get_uring_channel(event); + u32 val; + + /* Do nothing if not being set or is set explicitly to zero (default) */ + if (uring_channel == 0) + return; + + val = readl(uc_pmu->base + HISI_UC_EVENT_CTRL_REG); + + /* Do nothing, the uring_channel has been configured */ + if (uring_channel == FIELD_GET(HISI_UC_EVENT_URING_MSK, val)) + return; + + val &= ~HISI_UC_EVENT_URING_MSK; + val |= FIELD_PREP(HISI_UC_EVENT_URING_MSK, uring_channel); + writel(val, uc_pmu->base + HISI_UC_EVENT_CTRL_REG); +} + +static void hisi_uc_pmu_clear_uring_channel(struct perf_event *event) +{ + struct hisi_pmu *uc_pmu = to_hisi_pmu(event->pmu); + u32 val; + + /* Do nothing if not being set or is set explicitly to zero (default) */ + if (hisi_get_uring_channel(event) == 0) + return; + + val = readl(uc_pmu->base + HISI_UC_EVENT_CTRL_REG); + + /* Do nothing, the uring_channel has been cleaned up */ + if (FIELD_GET(HISI_UC_EVENT_URING_MSK, val) == 0) + return; + + val &= ~HISI_UC_EVENT_URING_MSK; + writel(val, uc_pmu->base + HISI_UC_EVENT_CTRL_REG); +} + +static void hisi_uc_pmu_enable_filter(struct perf_event *event) +{ + if (event->attr.config1 == 0) + return; + + hisi_uc_pmu_config_uring_channel(event); + hisi_uc_pmu_config_req_tracetag(event); + hisi_uc_pmu_config_srcid_tracetag(event); +} + +static void hisi_uc_pmu_disable_filter(struct perf_event *event) +{ + if (event->attr.config1 == 0) + return; + + hisi_uc_pmu_clear_srcid_tracetag(event); + hisi_uc_pmu_clear_req_tracetag(event); + hisi_uc_pmu_clear_uring_channel(event); +} + +static void hisi_uc_pmu_write_evtype(struct hisi_pmu *uc_pmu, int idx, u32 type) +{ + u32 val; + + /* + * Select the appropriate event select register. + * There are 2 32-bit event select registers for the + * 8 hardware counters, each event code is 8-bit wide. + */ + val = readl(uc_pmu->base + HISI_UC_EVTYPE_REGn(idx / 4)); + val &= ~(HISI_UC_EVTYPE_MASK << HISI_PMU_EVTYPE_SHIFT(idx)); + val |= (type << HISI_PMU_EVTYPE_SHIFT(idx)); + writel(val, uc_pmu->base + HISI_UC_EVTYPE_REGn(idx / 4)); +} + +static void hisi_uc_pmu_start_counters(struct hisi_pmu *uc_pmu) +{ + u32 val; + + val = readl(uc_pmu->base + HISI_UC_EVENT_CTRL_REG); + val |= HISI_UC_EVENT_GLB_EN; + writel(val, uc_pmu->base + HISI_UC_EVENT_CTRL_REG); +} + +static void hisi_uc_pmu_stop_counters(struct hisi_pmu *uc_pmu) +{ + u32 val; + + val = readl(uc_pmu->base + HISI_UC_EVENT_CTRL_REG); + val &= ~HISI_UC_EVENT_GLB_EN; + writel(val, uc_pmu->base + HISI_UC_EVENT_CTRL_REG); +} + +static void hisi_uc_pmu_enable_counter(struct hisi_pmu *uc_pmu, + struct hw_perf_event *hwc) +{ + u32 val; + + /* Enable counter index */ + val = readl(uc_pmu->base + HISI_UC_EVENT_CTRL_REG); + val |= (1 << hwc->idx); + writel(val, uc_pmu->base + HISI_UC_EVENT_CTRL_REG); +} + +static void hisi_uc_pmu_disable_counter(struct hisi_pmu *uc_pmu, + struct hw_perf_event *hwc) +{ + u32 val; + + /* Clear counter index */ + val = readl(uc_pmu->base + HISI_UC_EVENT_CTRL_REG); + val &= ~(1 << hwc->idx); + writel(val, uc_pmu->base + HISI_UC_EVENT_CTRL_REG); +} + +static u64 hisi_uc_pmu_read_counter(struct hisi_pmu *uc_pmu, + struct hw_perf_event *hwc) +{ + return readq(uc_pmu->base + HISI_UC_CNTR_REGn(hwc->idx)); +} + +static void hisi_uc_pmu_write_counter(struct hisi_pmu *uc_pmu, + struct hw_perf_event *hwc, u64 val) +{ + writeq(val, uc_pmu->base + HISI_UC_CNTR_REGn(hwc->idx)); +} + +static void hisi_uc_pmu_enable_counter_int(struct hisi_pmu *uc_pmu, + struct hw_perf_event *hwc) +{ + u32 val; + + val = readl(uc_pmu->base + HISI_UC_INT_MASK_REG); + val &= ~(1 << hwc->idx); + writel(val, uc_pmu->base + HISI_UC_INT_MASK_REG); +} + +static void hisi_uc_pmu_disable_counter_int(struct hisi_pmu *uc_pmu, + struct hw_perf_event *hwc) +{ + u32 val; + + val = readl(uc_pmu->base + HISI_UC_INT_MASK_REG); + val |= (1 << hwc->idx); + writel(val, uc_pmu->base + HISI_UC_INT_MASK_REG); +} + +static u32 hisi_uc_pmu_get_int_status(struct hisi_pmu *uc_pmu) +{ + return readl(uc_pmu->base + HISI_UC_INT_STS_REG); +} + +static void hisi_uc_pmu_clear_int_status(struct hisi_pmu *uc_pmu, int idx) +{ + writel(1 << idx, uc_pmu->base + HISI_UC_INT_CLEAR_REG); +} + +static int hisi_uc_pmu_init_data(struct platform_device *pdev, + struct hisi_pmu *uc_pmu) +{ + /* + * Use SCCL (Super CPU Cluster) ID and CCL (CPU Cluster) ID to + * identify the topology information of UC PMU devices in the chip. + * They have some CCLs per SCCL and then 4 UC PMU per CCL. + */ + if (device_property_read_u32(&pdev->dev, "hisilicon,scl-id", + &uc_pmu->sccl_id)) { + dev_err(&pdev->dev, "Can not read uc sccl-id!\n"); + return -EINVAL; + } + + if (device_property_read_u32(&pdev->dev, "hisilicon,ccl-id", + &uc_pmu->ccl_id)) { + dev_err(&pdev->dev, "Can not read uc ccl-id!\n"); + return -EINVAL; + } + + if (device_property_read_u32(&pdev->dev, "hisilicon,sub-id", + &uc_pmu->sub_id)) { + dev_err(&pdev->dev, "Can not read sub-id!\n"); + return -EINVAL; + } + + uc_pmu->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(uc_pmu->base)) { + dev_err(&pdev->dev, "ioremap failed for uc_pmu resource\n"); + return PTR_ERR(uc_pmu->base); + } + + uc_pmu->identifier = readl(uc_pmu->base + HISI_UC_VERSION_REG); + + return 0; +} + +static struct attribute *hisi_uc_pmu_format_attr[] = { + HISI_PMU_FORMAT_ATTR(event, "config:0-7"), + HISI_PMU_FORMAT_ATTR(rd_req_en, "config1:0-0"), + HISI_PMU_FORMAT_ATTR(uring_channel, "config1:4-5"), + HISI_PMU_FORMAT_ATTR(srcid, "config1:6-19"), + HISI_PMU_FORMAT_ATTR(srcid_en, "config1:20-20"), + NULL +}; + +static const struct attribute_group hisi_uc_pmu_format_group = { + .name = "format", + .attrs = hisi_uc_pmu_format_attr, +}; + +static struct attribute *hisi_uc_pmu_events_attr[] = { + HISI_PMU_EVENT_ATTR(sq_time, 0x00), + HISI_PMU_EVENT_ATTR(pq_time, 0x01), + HISI_PMU_EVENT_ATTR(hbm_time, 0x02), + HISI_PMU_EVENT_ATTR(iq_comp_time_cring, 0x03), + HISI_PMU_EVENT_ATTR(iq_comp_time_uring, 0x05), + HISI_PMU_EVENT_ATTR(cpu_rd, 0x10), + HISI_PMU_EVENT_ATTR(cpu_rd64, 0x17), + HISI_PMU_EVENT_ATTR(cpu_rs64, 0x19), + HISI_PMU_EVENT_ATTR(cpu_mru, 0x1a), + HISI_PMU_EVENT_ATTR(cycles, 0x9c), + HISI_PMU_EVENT_ATTR(spipe_hit, 0xb3), + HISI_PMU_EVENT_ATTR(hpipe_hit, 0xdb), + HISI_PMU_EVENT_ATTR(cring_rxdat_cnt, 0xfa), + HISI_PMU_EVENT_ATTR(cring_txdat_cnt, 0xfb), + HISI_PMU_EVENT_ATTR(uring_rxdat_cnt, 0xfc), + HISI_PMU_EVENT_ATTR(uring_txdat_cnt, 0xfd), + NULL +}; + +static const struct attribute_group hisi_uc_pmu_events_group = { + .name = "events", + .attrs = hisi_uc_pmu_events_attr, +}; + +static DEVICE_ATTR(cpumask, 0444, hisi_cpumask_sysfs_show, NULL); + +static struct attribute *hisi_uc_pmu_cpumask_attrs[] = { + &dev_attr_cpumask.attr, + NULL, +}; + +static const struct attribute_group hisi_uc_pmu_cpumask_attr_group = { + .attrs = hisi_uc_pmu_cpumask_attrs, +}; + +static struct device_attribute hisi_uc_pmu_identifier_attr = + __ATTR(identifier, 0444, hisi_uncore_pmu_identifier_attr_show, NULL); + +static struct attribute *hisi_uc_pmu_identifier_attrs[] = { + &hisi_uc_pmu_identifier_attr.attr, + NULL +}; + +static const struct attribute_group hisi_uc_pmu_identifier_group = { + .attrs = hisi_uc_pmu_identifier_attrs, +}; + +static const struct attribute_group *hisi_uc_pmu_attr_groups[] = { + &hisi_uc_pmu_format_group, + &hisi_uc_pmu_events_group, + &hisi_uc_pmu_cpumask_attr_group, + &hisi_uc_pmu_identifier_group, + NULL +}; + +static const struct hisi_uncore_ops hisi_uncore_uc_pmu_ops = { + .check_filter = hisi_uc_pmu_check_filter, + .write_evtype = hisi_uc_pmu_write_evtype, + .get_event_idx = hisi_uncore_pmu_get_event_idx, + .start_counters = hisi_uc_pmu_start_counters, + .stop_counters = hisi_uc_pmu_stop_counters, + .enable_counter = hisi_uc_pmu_enable_counter, + .disable_counter = hisi_uc_pmu_disable_counter, + .enable_counter_int = hisi_uc_pmu_enable_counter_int, + .disable_counter_int = hisi_uc_pmu_disable_counter_int, + .write_counter = hisi_uc_pmu_write_counter, + .read_counter = hisi_uc_pmu_read_counter, + .get_int_status = hisi_uc_pmu_get_int_status, + .clear_int_status = hisi_uc_pmu_clear_int_status, + .enable_filter = hisi_uc_pmu_enable_filter, + .disable_filter = hisi_uc_pmu_disable_filter, +}; + +static int hisi_uc_pmu_dev_probe(struct platform_device *pdev, + struct hisi_pmu *uc_pmu) +{ + int ret; + + ret = hisi_uc_pmu_init_data(pdev, uc_pmu); + if (ret) + return ret; + + ret = hisi_uncore_pmu_init_irq(uc_pmu, pdev); + if (ret) + return ret; + + uc_pmu->pmu_events.attr_groups = hisi_uc_pmu_attr_groups; + uc_pmu->check_event = HISI_UC_EVTYPE_MASK; + uc_pmu->ops = &hisi_uncore_uc_pmu_ops; + uc_pmu->counter_bits = HISI_UC_CNTR_REG_BITS; + uc_pmu->num_counters = HISI_UC_NR_COUNTERS; + uc_pmu->dev = &pdev->dev; + uc_pmu->on_cpu = -1; + + return 0; +} + +static void hisi_uc_pmu_remove_cpuhp_instance(void *hotplug_node) +{ + cpuhp_state_remove_instance_nocalls(hisi_uc_pmu_online, hotplug_node); +} + +static void hisi_uc_pmu_unregister_pmu(void *pmu) +{ + perf_pmu_unregister(pmu); +} + +static int hisi_uc_pmu_probe(struct platform_device *pdev) +{ + struct hisi_pmu *uc_pmu; + char *name; + int ret; + + uc_pmu = devm_kzalloc(&pdev->dev, sizeof(*uc_pmu), GFP_KERNEL); + if (!uc_pmu) + return -ENOMEM; + + platform_set_drvdata(pdev, uc_pmu); + + ret = hisi_uc_pmu_dev_probe(pdev, uc_pmu); + if (ret) + return ret; + + name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sccl%d_uc%d_%u", + uc_pmu->sccl_id, uc_pmu->ccl_id, uc_pmu->sub_id); + if (!name) + return -ENOMEM; + + ret = cpuhp_state_add_instance(hisi_uc_pmu_online, &uc_pmu->node); + if (ret) + return dev_err_probe(&pdev->dev, ret, "Error registering hotplug\n"); + + ret = devm_add_action_or_reset(&pdev->dev, + hisi_uc_pmu_remove_cpuhp_instance, + &uc_pmu->node); + if (ret) + return ret; + + hisi_pmu_init(uc_pmu, THIS_MODULE); + + ret = perf_pmu_register(&uc_pmu->pmu, name, -1); + if (ret) + return ret; + + return devm_add_action_or_reset(&pdev->dev, + hisi_uc_pmu_unregister_pmu, + &uc_pmu->pmu); +} + +static const struct acpi_device_id hisi_uc_pmu_acpi_match[] = { + { "HISI0291", }, + {} +}; +MODULE_DEVICE_TABLE(acpi, hisi_uc_pmu_acpi_match); + +static struct platform_driver hisi_uc_pmu_driver = { + .driver = { + .name = "hisi_uc_pmu", + .acpi_match_table = hisi_uc_pmu_acpi_match, + /* + * We have not worked out a safe bind/unbind process, + * Forcefully unbinding during sampling will lead to a + * kernel panic, so this is not supported yet. + */ + .suppress_bind_attrs = true, + }, + .probe = hisi_uc_pmu_probe, +}; + +static int __init hisi_uc_pmu_module_init(void) +{ + int ret; + + ret = cpuhp_setup_state_multi(CPUHP_AP_ONLINE_DYN, + "perf/hisi/uc:online", + hisi_uncore_pmu_online_cpu, + hisi_uncore_pmu_offline_cpu); + if (ret < 0) { + pr_err("UC PMU: Error setup hotplug, ret = %d\n", ret); + return ret; + } + hisi_uc_pmu_online = ret; + + ret = platform_driver_register(&hisi_uc_pmu_driver); + if (ret) + cpuhp_remove_multi_state(hisi_uc_pmu_online); + + return ret; +} +module_init(hisi_uc_pmu_module_init); + +static void __exit hisi_uc_pmu_module_exit(void) +{ + platform_driver_unregister(&hisi_uc_pmu_driver); + cpuhp_remove_multi_state(hisi_uc_pmu_online); +} +module_exit(hisi_uc_pmu_module_exit); + +MODULE_DESCRIPTION("HiSilicon SoC UC uncore PMU driver"); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Junhao He <hejunhao3@huawei.com>"); |