From: Chen Jun chenjun102@huawei.com
hulk inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I584X2
Reference: https://gitee.com/openeuler/kernel/commit/71a2e2250c79987a2a8804674dd3b41491...
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Add support for HiSilicon SoC LPDDRC PMU
Signed-off-by: Chen Jun chenjun102@huawei.com Reviewed-by: Weilong Chen chenweilong@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com
Signed-off-by: Chen Jun chenjun102@huawei.com --- drivers/perf/hisilicon/Makefile | 3 +- .../perf/hisilicon/hisi_uncore_lpddrc_pmu.c | 408 ++++++++++++++++++ 2 files changed, 410 insertions(+), 1 deletion(-) create mode 100644 drivers/perf/hisilicon/hisi_uncore_lpddrc_pmu.c
diff --git a/drivers/perf/hisilicon/Makefile b/drivers/perf/hisilicon/Makefile index 18abcb612216..22e384cdfd53 100644 --- a/drivers/perf/hisilicon/Makefile +++ b/drivers/perf/hisilicon/Makefile @@ -2,4 +2,5 @@ obj-$(CONFIG_HISI_PMU) += hisi_uncore_pmu.o hisi_uncore_l3c_pmu.o \ hisi_uncore_hha_pmu.o hisi_uncore_ddrc_pmu.o hisi_uncore_sllc_pmu.o \ hisi_uncore_pa_pmu.o \ - hisi_uncore_l3t_pmu.o + hisi_uncore_l3t_pmu.o \ + hisi_uncore_lpddrc_pmu.o diff --git a/drivers/perf/hisilicon/hisi_uncore_lpddrc_pmu.c b/drivers/perf/hisilicon/hisi_uncore_lpddrc_pmu.c new file mode 100644 index 000000000000..03a4bb1a9948 --- /dev/null +++ b/drivers/perf/hisilicon/hisi_uncore_lpddrc_pmu.c @@ -0,0 +1,408 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * HiSilicon SoC LPDDRC uncore Hardware event counters support + * + * Copyright (C) 2017 Hisilicon Limited + * Author: Shaokun Zhang zhangshaokun@hisilicon.com + * Anurup M anurup.m@huawei.com + * + * This code is based on the uncore PMUs like arm-cci and arm-ccn. + */ +#include <linux/acpi.h> +#include <linux/bug.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" + +/* LPDDRC register definition in v1 */ +#define LPDDRC_PERF_CTRL 0x4930 +#define LPDDRC_FLUX_WR 0x4948 +#define LPDDRC_FLUX_RD 0x494c +#define LPDDRC_FLUX_WCMD 0x4950 +#define LPDDRC_FLUX_RCMD 0x4954 +#define LPDDRC_PRE_CMD 0x4984 +#define LPDDRC_ACT_CMD 0x4988 +#define LPDDRC_RNK_CHG 0x4990 +#define LPDDRC_RW_CHG 0x4994 +#define LPDDRC_EVENT_CTRL 0x4d60 +#define LPDDRC_INT_MASK 0x6c8 +#define LPDDRC_INT_STATUS 0x6cc +#define LPDDRC_INT_CLEAR 0x6d0 +#define LPDDRC_VERSION 0x710 + +#define LPDDRC_NR_COUNTERS 0x8 +#define LPDDRC_V1_PERF_CTRL_EN 0x1 +#define LPDDRC_V1_NR_EVENTS 0x7 + +/* + * For PMU v1, there are eight-events and every event has been mapped + * to fixed-purpose counters which register offset is not consistent. + * Therefore there is no write event type and we assume that event + * code (0 to 7) is equal to counter index in PMU driver. + */ +#define GET_LPDDRC_EVENTID(hwc) (hwc->config_base & 0x7) + +static const u32 lpddrc_reg_off[] = { + LPDDRC_FLUX_WR, LPDDRC_FLUX_RD, LPDDRC_FLUX_WCMD, LPDDRC_FLUX_RCMD, + LPDDRC_PRE_CMD, LPDDRC_ACT_CMD, LPDDRC_RNK_CHG, LPDDRC_RW_CHG +}; + +/* + * Select the counter register offset using the counter index. + * In PMU v1, there are no programmable counter, the count + * is read form the statistics counter register itself. + */ +static u32 hisi_lpddrc_pmu_v1_get_counter_offset(int cntr_idx) +{ + return lpddrc_reg_off[cntr_idx]; +} + +static u64 hisi_lpddrc_pmu_v1_read_counter(struct hisi_pmu *lpddrc_pmu, + struct hw_perf_event *hwc) +{ + return readl(lpddrc_pmu->base + + hisi_lpddrc_pmu_v1_get_counter_offset(hwc->idx)); +} + +/* + * For LPDDRC PMU, event counter should be reset when start counters, + * reset the prev_count by software, because the counter register was RO. + */ +static void hisi_lpddrc_pmu_v1_write_counter(struct hisi_pmu *lpddrc_pmu, + struct hw_perf_event *hwc, u64 val) +{ + local64_set(&hwc->prev_count, 0); +} + +/* + * For LPDDRC PMU v1, event has been mapped to fixed-purpose counter by hardware, + * so there is no need to write event type, while it is programmable counter in + * PMU v2. + */ +static void hisi_lpddrc_pmu_write_evtype(struct hisi_pmu *hha_pmu, int idx, + u32 type) +{ +} + +static void hisi_lpddrc_pmu_v1_start_counters(struct hisi_pmu *lpddrc_pmu) +{ + u32 val; + + /* Set perf_enable in LPDDRC_PERF_CTRL to start event counting */ + val = readl(lpddrc_pmu->base + LPDDRC_PERF_CTRL); + val |= LPDDRC_V1_PERF_CTRL_EN; + writel(val, lpddrc_pmu->base + LPDDRC_PERF_CTRL); +} + +static void hisi_lpddrc_pmu_v1_stop_counters(struct hisi_pmu *lpddrc_pmu) +{ + u32 val; + + /* Clear perf_enable in LPDDRC_PERF_CTRL to stop event counting */ + val = readl(lpddrc_pmu->base + LPDDRC_PERF_CTRL); + val &= ~LPDDRC_V1_PERF_CTRL_EN; + writel(val, lpddrc_pmu->base + LPDDRC_PERF_CTRL); +} + +static void hisi_lpddrc_pmu_v1_enable_counter(struct hisi_pmu *lpddrc_pmu, + struct hw_perf_event *hwc) +{ + u32 val; + + /* Set counter index(event code) in LPDDRC_EVENT_CTRL register */ + val = readl(lpddrc_pmu->base + LPDDRC_EVENT_CTRL); + val |= (1 << GET_LPDDRC_EVENTID(hwc)); + writel(val, lpddrc_pmu->base + LPDDRC_EVENT_CTRL); +} + +static void hisi_lpddrc_pmu_v1_disable_counter(struct hisi_pmu *lpddrc_pmu, + struct hw_perf_event *hwc) +{ + u32 val; + + /* Clear counter index(event code) in LPDDRC_EVENT_CTRL register */ + val = readl(lpddrc_pmu->base + LPDDRC_EVENT_CTRL); + val &= ~(1 << GET_LPDDRC_EVENTID(hwc)); + writel(val, lpddrc_pmu->base + LPDDRC_EVENT_CTRL); +} + +static int hisi_lpddrc_pmu_v1_get_event_idx(struct perf_event *event) +{ + struct hisi_pmu *lpddrc_pmu = to_hisi_pmu(event->pmu); + unsigned long *used_mask = lpddrc_pmu->pmu_events.used_mask; + struct hw_perf_event *hwc = &event->hw; + /* For LPDDRC PMU, we use event code as counter index */ + int idx = GET_LPDDRC_EVENTID(hwc); + + if (test_bit(idx, used_mask)) + return -EAGAIN; + + set_bit(idx, used_mask); + + return idx; +} + +static void hisi_lpddrc_pmu_v1_enable_counter_int(struct hisi_pmu *lpddrc_pmu, + struct hw_perf_event *hwc) +{ + u32 val; + + /* Write 0 to enable interrupt */ + val = readl(lpddrc_pmu->base + LPDDRC_INT_MASK); + val &= ~(1 << hwc->idx); + writel(val, lpddrc_pmu->base + LPDDRC_INT_MASK); +} + +static void hisi_lpddrc_pmu_v1_disable_counter_int(struct hisi_pmu *lpddrc_pmu, + struct hw_perf_event *hwc) +{ + u32 val; + + /* Write 1 to mask interrupt */ + val = readl(lpddrc_pmu->base + LPDDRC_INT_MASK); + val |= 1 << hwc->idx; + writel(val, lpddrc_pmu->base + LPDDRC_INT_MASK); +} + +static u32 hisi_lpddrc_pmu_v1_get_int_status(struct hisi_pmu *lpddrc_pmu) +{ + return readl(lpddrc_pmu->base + LPDDRC_INT_STATUS); +} + +static void hisi_lpddrc_pmu_v1_clear_int_status(struct hisi_pmu *lpddrc_pmu, + int idx) +{ + writel(1 << idx, lpddrc_pmu->base + LPDDRC_INT_CLEAR); +} + +static const struct acpi_device_id hisi_lpddrc_pmu_acpi_match[] = { + {} +}; +MODULE_DEVICE_TABLE(acpi, hisi_lpddrc_pmu_acpi_match); + +static const struct of_device_id lpddrc_of_match[] = { + { .compatible = "hisilicon,lpddrc-pmu", }, + {}, +}; + +static int hisi_lpddrc_pmu_init_data(struct platform_device *pdev, + struct hisi_pmu *lpddrc_pmu) +{ + /* + * Use the SCCL_ID and LPDDRC channel ID to identify the + * LPDDRC PMU, while SCCL_ID is in MPIDR[aff2]. + */ + if (device_property_read_u32(&pdev->dev, "hisilicon,ch-id", + &lpddrc_pmu->index_id)) { + dev_err(&pdev->dev, "Can not read lpddrc channel-id!\n"); + return -EINVAL; + } + + if (device_property_read_u32(&pdev->dev, "hisilicon,scl-id", + &lpddrc_pmu->sccl_id)) { + dev_err(&pdev->dev, "Can not read lpddrc sccl-id!\n"); + return -EINVAL; + } + /* LPDDRC PMUs only share the same SCCL */ + lpddrc_pmu->ccl_id = -1; + + lpddrc_pmu->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(lpddrc_pmu->base)) { + dev_err(&pdev->dev, "ioremap failed for lpddrc_pmu resource\n"); + return PTR_ERR(lpddrc_pmu->base); + } + + lpddrc_pmu->identifier = readl(lpddrc_pmu->base + LPDDRC_VERSION); + + return 0; +} + +static struct attribute *hisi_lpddrc_pmu_v1_format_attr[] = { + HISI_PMU_FORMAT_ATTR(event, "config:0-4"), + NULL, +}; + +static const struct attribute_group hisi_lpddrc_pmu_v1_format_group = { + .name = "format", + .attrs = hisi_lpddrc_pmu_v1_format_attr, +}; + +static struct attribute *hisi_lpddrc_pmu_v1_events_attr[] = { + HISI_PMU_EVENT_ATTR(flux_wr, 0x00), + HISI_PMU_EVENT_ATTR(flux_rd, 0x01), + HISI_PMU_EVENT_ATTR(flux_wcmd, 0x02), + HISI_PMU_EVENT_ATTR(flux_rcmd, 0x03), + HISI_PMU_EVENT_ATTR(pre_cmd, 0x04), + HISI_PMU_EVENT_ATTR(act_cmd, 0x05), + HISI_PMU_EVENT_ATTR(rnk_chg, 0x06), + HISI_PMU_EVENT_ATTR(rw_chg, 0x07), + NULL, +}; + +static const struct attribute_group hisi_lpddrc_pmu_v1_events_group = { + .name = "events", + .attrs = hisi_lpddrc_pmu_v1_events_attr, +}; + +static DEVICE_ATTR(cpumask, 0444, hisi_cpumask_sysfs_show, NULL); + +static struct attribute *hisi_lpddrc_pmu_cpumask_attrs[] = { + &dev_attr_cpumask.attr, + NULL, +}; + +static const struct attribute_group hisi_lpddrc_pmu_cpumask_attr_group = { + .attrs = hisi_lpddrc_pmu_cpumask_attrs, +}; + +static struct device_attribute hisi_lpddrc_pmu_identifier_attr = + __ATTR(identifier, 0444, hisi_uncore_pmu_identifier_attr_show, NULL); + +static struct attribute *hisi_lpddrc_pmu_identifier_attrs[] = { + &hisi_lpddrc_pmu_identifier_attr.attr, + NULL +}; + +static struct attribute_group hisi_lpddrc_pmu_identifier_group = { + .attrs = hisi_lpddrc_pmu_identifier_attrs, +}; + +static const struct attribute_group *hisi_lpddrc_pmu_v1_attr_groups[] = { + &hisi_lpddrc_pmu_v1_format_group, + &hisi_lpddrc_pmu_v1_events_group, + &hisi_lpddrc_pmu_cpumask_attr_group, + &hisi_lpddrc_pmu_identifier_group, + NULL, +}; + +static const struct hisi_uncore_ops hisi_uncore_lpddrc_v1_ops = { + .write_evtype = hisi_lpddrc_pmu_write_evtype, + .get_event_idx = hisi_lpddrc_pmu_v1_get_event_idx, + .start_counters = hisi_lpddrc_pmu_v1_start_counters, + .stop_counters = hisi_lpddrc_pmu_v1_stop_counters, + .enable_counter = hisi_lpddrc_pmu_v1_enable_counter, + .disable_counter = hisi_lpddrc_pmu_v1_disable_counter, + .enable_counter_int = hisi_lpddrc_pmu_v1_enable_counter_int, + .disable_counter_int = hisi_lpddrc_pmu_v1_disable_counter_int, + .write_counter = hisi_lpddrc_pmu_v1_write_counter, + .read_counter = hisi_lpddrc_pmu_v1_read_counter, + .get_int_status = hisi_lpddrc_pmu_v1_get_int_status, + .clear_int_status = hisi_lpddrc_pmu_v1_clear_int_status, +}; + +static int hisi_lpddrc_pmu_dev_probe(struct platform_device *pdev, + struct hisi_pmu *lpddrc_pmu) +{ + int ret; + + ret = hisi_lpddrc_pmu_init_data(pdev, lpddrc_pmu); + if (ret) + return ret; + + ret = hisi_uncore_pmu_init_irq(lpddrc_pmu, pdev); + if (ret) + return ret; + + lpddrc_pmu->counter_bits = 32; + lpddrc_pmu->check_event = LPDDRC_V1_NR_EVENTS; + lpddrc_pmu->pmu_events.attr_groups = hisi_lpddrc_pmu_v1_attr_groups; + lpddrc_pmu->ops = &hisi_uncore_lpddrc_v1_ops; + + lpddrc_pmu->num_counters = LPDDRC_NR_COUNTERS; + lpddrc_pmu->dev = &pdev->dev; + lpddrc_pmu->on_cpu = -1; + + return 0; +} + +static int hisi_lpddrc_pmu_probe(struct platform_device *pdev) +{ + struct hisi_pmu *lpddrc_pmu; + char *name; + int ret; + + lpddrc_pmu = devm_kzalloc(&pdev->dev, sizeof(*lpddrc_pmu), GFP_KERNEL); + if (!lpddrc_pmu) + return -ENOMEM; + + platform_set_drvdata(pdev, lpddrc_pmu); + + ret = hisi_lpddrc_pmu_dev_probe(pdev, lpddrc_pmu); + if (ret) + return ret; + + name = devm_kasprintf(&pdev->dev, GFP_KERNEL, + "hisi_sccl%u_lpddrc%u", lpddrc_pmu->sccl_id, + lpddrc_pmu->index_id); + + lpddrc_pmu->pmu = (struct pmu) { + .name = name, + .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 = lpddrc_pmu->pmu_events.attr_groups, + .capabilities = PERF_PMU_CAP_NO_EXCLUDE, + }; + + /* Pick one core to use for cpumask attributes */ + cpumask_set_cpu(smp_processor_id(), &lpddrc_pmu->associated_cpus); + + lpddrc_pmu->on_cpu = cpumask_first(&lpddrc_pmu->associated_cpus); + if (lpddrc_pmu->on_cpu >= nr_cpu_ids) + return -EINVAL; + + ret = perf_pmu_register(&lpddrc_pmu->pmu, name, -1); + + return ret; +} + +static int hisi_lpddrc_pmu_remove(struct platform_device *pdev) +{ + struct hisi_pmu *lpddrc_pmu = platform_get_drvdata(pdev); + + perf_pmu_unregister(&lpddrc_pmu->pmu); + return 0; +} + +static struct platform_driver hisi_lpddrc_pmu_driver = { + .driver = { + .name = "hisi_lpddrc_pmu", + .acpi_match_table = ACPI_PTR(hisi_lpddrc_pmu_acpi_match), + .of_match_table = lpddrc_of_match, + .suppress_bind_attrs = true, + }, + .probe = hisi_lpddrc_pmu_probe, + .remove = hisi_lpddrc_pmu_remove, +}; + +static int __init hisi_lpddrc_pmu_module_init(void) +{ + int ret; + + ret = platform_driver_register(&hisi_lpddrc_pmu_driver); + + return ret; +} +module_init(hisi_lpddrc_pmu_module_init); + +static void __exit hisi_lpddrc_pmu_module_exit(void) +{ + platform_driver_unregister(&hisi_lpddrc_pmu_driver); +} +module_exit(hisi_lpddrc_pmu_module_exit); + +MODULE_DESCRIPTION("HiSilicon SoC LPDDRC uncore PMU driver"); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Shaokun Zhang zhangshaokun@hisilicon.com"); +MODULE_AUTHOR("Anurup M anurup.m@huawei.com");