// SPDX-License-Identifier: GPL-2.0 /* * Alibaba DDR Sub-System Driveway PMU driver * * Copyright (C) 2022 Alibaba Inc */ #define ALI_DRW_PMUNAME … #define ALI_DRW_DRVNAME … #define pr_fmt(fmt) … #include <linux/acpi.h> #include <linux/bitfield.h> #include <linux/bitmap.h> #include <linux/bitops.h> #include <linux/cpuhotplug.h> #include <linux/cpumask.h> #include <linux/device.h> #include <linux/errno.h> #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/kernel.h> #include <linux/list.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/perf_event.h> #include <linux/platform_device.h> #include <linux/printk.h> #include <linux/rculist.h> #include <linux/refcount.h> #define ALI_DRW_PMU_COMMON_MAX_COUNTERS … #define ALI_DRW_PMU_TEST_SEL_COMMON_COUNTER_BASE … #define ALI_DRW_PMU_PA_SHIFT … #define ALI_DRW_PMU_CNT_INIT … #define ALI_DRW_CNT_MAX_PERIOD … #define ALI_DRW_PMU_CYCLE_EVT_ID … #define ALI_DRW_PMU_CNT_CTRL … #define ALI_DRW_PMU_CNT_RST … #define ALI_DRW_PMU_CNT_STOP … #define ALI_DRW_PMU_CNT_START … #define ALI_DRW_PMU_CNT_STATE … #define ALI_DRW_PMU_TEST_CTRL … #define ALI_DRW_PMU_CNT_PRELOAD … #define ALI_DRW_PMU_CYCLE_CNT_HIGH_MASK … #define ALI_DRW_PMU_CYCLE_CNT_LOW_MASK … #define ALI_DRW_PMU_CYCLE_CNT_HIGH … #define ALI_DRW_PMU_CYCLE_CNT_LOW … /* PMU EVENT SEL 0-3 are paired in 32-bit registers on a 4-byte stride */ #define ALI_DRW_PMU_EVENT_SEL0 … /* counter 0-3 use sel0, counter 4-7 use sel1...*/ #define ALI_DRW_PMU_EVENT_SELn(n) … #define ALI_DRW_PMCOM_CNT_EN … #define ALI_DRW_PMCOM_CNT_EVENT_MASK … #define ALI_DRW_PMCOM_CNT_EVENT_OFFSET(n) … /* PMU COMMON COUNTER 0-15, are paired in 32-bit registers on a 4-byte stride */ #define ALI_DRW_PMU_COMMON_COUNTER0 … #define ALI_DRW_PMU_COMMON_COUNTERn(n) … #define ALI_DRW_PMU_OV_INTR_ENABLE_CTL … #define ALI_DRW_PMU_OV_INTR_DISABLE_CTL … #define ALI_DRW_PMU_OV_INTR_ENABLE_STATUS … #define ALI_DRW_PMU_OV_INTR_CLR … #define ALI_DRW_PMU_OV_INTR_STATUS … #define ALI_DRW_PMCOM_CNT_OV_INTR_MASK … #define ALI_DRW_PMBW_CNT_OV_INTR_MASK … #define ALI_DRW_PMU_OV_INTR_MASK … static int ali_drw_cpuhp_state_num; static LIST_HEAD(ali_drw_pmu_irqs); static DEFINE_MUTEX(ali_drw_pmu_irqs_lock); struct ali_drw_pmu_irq { … }; struct ali_drw_pmu { … }; #define to_ali_drw_pmu(p) … #define DRW_CONFIG_EVENTID … #define GET_DRW_EVENTID(event) … static ssize_t ali_drw_pmu_format_show(struct device *dev, struct device_attribute *attr, char *buf) { … } /* * PMU event attributes */ static ssize_t ali_drw_pmu_event_show(struct device *dev, struct device_attribute *attr, char *page) { … } #define ALI_DRW_PMU_ATTR(_name, _func, _config) … #define ALI_DRW_PMU_FORMAT_ATTR(_name, _config) … #define ALI_DRW_PMU_EVENT_ATTR(_name, _config) … static struct attribute *ali_drw_pmu_events_attrs[] = …; static struct attribute_group ali_drw_pmu_events_attr_group = …; static struct attribute *ali_drw_pmu_format_attr[] = …; static const struct attribute_group ali_drw_pmu_format_group = …; static ssize_t ali_drw_pmu_cpumask_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static struct device_attribute ali_drw_pmu_cpumask_attr = …; static struct attribute *ali_drw_pmu_cpumask_attrs[] = …; static const struct attribute_group ali_drw_pmu_cpumask_attr_group = …; static umode_t ali_drw_pmu_identifier_attr_visible(struct kobject *kobj, struct attribute *attr, int n) { … } static DEVICE_STRING_ATTR_RO(ali_drw_pmu_identifier, 0444, "ali_drw_pmu"); static struct attribute *ali_drw_pmu_identifier_attrs[] = …; static const struct attribute_group ali_drw_pmu_identifier_attr_group = …; static const struct attribute_group *ali_drw_pmu_attr_groups[] = …; /* find a counter for event, then in add func, hw.idx will equal to counter */ static int ali_drw_get_counter_idx(struct perf_event *event) { … } static u64 ali_drw_pmu_read_counter(struct perf_event *event) { … } static void ali_drw_pmu_event_update(struct perf_event *event) { … } static void ali_drw_pmu_event_set_period(struct perf_event *event) { … } static void ali_drw_pmu_enable_counter(struct perf_event *event) { … } static void ali_drw_pmu_disable_counter(struct perf_event *event) { … } static irqreturn_t ali_drw_pmu_isr(int irq_num, void *data) { … } static struct ali_drw_pmu_irq *__ali_drw_pmu_init_irq(struct platform_device *pdev, int irq_num) { … } static int ali_drw_pmu_init_irq(struct ali_drw_pmu *drw_pmu, struct platform_device *pdev) { … } static void ali_drw_pmu_uninit_irq(struct ali_drw_pmu *drw_pmu) { … } static int ali_drw_pmu_event_init(struct perf_event *event) { … } static void ali_drw_pmu_start(struct perf_event *event, int flags) { … } static void ali_drw_pmu_stop(struct perf_event *event, int flags) { … } static int ali_drw_pmu_add(struct perf_event *event, int flags) { … } static void ali_drw_pmu_del(struct perf_event *event, int flags) { … } static void ali_drw_pmu_read(struct perf_event *event) { … } static int ali_drw_pmu_probe(struct platform_device *pdev) { … } static void ali_drw_pmu_remove(struct platform_device *pdev) { … } static int ali_drw_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node) { … } /* * Due to historical reasons, the HID used in the production environment is * ARMHD700, so we leave ARMHD700 as Compatible ID. */ static const struct acpi_device_id ali_drw_acpi_match[] = …; MODULE_DEVICE_TABLE(acpi, ali_drw_acpi_match); static struct platform_driver ali_drw_pmu_driver = …; static int __init ali_drw_pmu_init(void) { … } static void __exit ali_drw_pmu_exit(void) { … } module_init(…) …; module_exit(ali_drw_pmu_exit); MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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