LXR linux/drivers/perf/hisilicon/hisi_uncore

   1/*
   2 * HiSilicon SoC Hardware event counters support
   3 *
   4 * Copyright (C) 2017 Hisilicon Limited
   5 * Author: Anurup M <anurup.m@huawei.com>
   6 *         Shaokun Zhang <zhangshaokun@hisilicon.com>
   7 *
   8 * This code is based on the uncore PMUs like arm-cci and arm-ccn.
   9 *
  10 * This program is free software; you can redistribute it and/or modify
  11 * it under the terms of the GNU General Public License version 2 as
  12 * published by the Free Software Foundation.
  13 */
  14#ifndef __HISI_UNCORE_PMU_H__
  15#define __HISI_UNCORE_PMU_H__
  16
  17#include <linux/cpumask.h>
  18#include <linux/device.h>
  19#include <linux/kernel.h>
  20#include <linux/perf_event.h>
  21#include <linux/types.h>
  22
  23#undef pr_fmt
  24#define pr_fmt(fmt)     "hisi_pmu: " fmt
  25
  26#define HISI_MAX_COUNTERS 0x10
  27#define to_hisi_pmu(p)  (container_of(p, struct hisi_pmu, pmu))
  28
  29#define HISI_PMU_ATTR(_name, _func, _config)                            \
  30        (&((struct dev_ext_attribute[]) {                               \
  31                { __ATTR(_name, 0444, _func, NULL), (void *)_config }   \
  32        })[0].attr.attr)
  33
  34#define HISI_PMU_FORMAT_ATTR(_name, _config)            \
  35        HISI_PMU_ATTR(_name, hisi_format_sysfs_show, (void *)_config)
  36#define HISI_PMU_EVENT_ATTR(_name, _config)             \
  37        HISI_PMU_ATTR(_name, hisi_event_sysfs_show, (unsigned long)_config)
  38
  39struct hisi_pmu;
  40
  41struct hisi_uncore_ops {
  42        void (*write_evtype)(struct hisi_pmu *, int, u32);
  43        int (*get_event_idx)(struct perf_event *);
  44        u64 (*read_counter)(struct hisi_pmu *, struct hw_perf_event *);
  45        void (*write_counter)(struct hisi_pmu *, struct hw_perf_event *, u64);
  46        void (*enable_counter)(struct hisi_pmu *, struct hw_perf_event *);
  47        void (*disable_counter)(struct hisi_pmu *, struct hw_perf_event *);
  48        void (*enable_counter_int)(struct hisi_pmu *, struct hw_perf_event *);
  49        void (*disable_counter_int)(struct hisi_pmu *, struct hw_perf_event *);
  50        void (*start_counters)(struct hisi_pmu *);
  51        void (*stop_counters)(struct hisi_pmu *);
  52};
  53
  54struct hisi_pmu_hwevents {
  55        struct perf_event *hw_events[HISI_MAX_COUNTERS];
  56        DECLARE_BITMAP(used_mask, HISI_MAX_COUNTERS);
  57};
  58
  59/* Generic pmu struct for different pmu types */
  60struct hisi_pmu {
  61        struct pmu pmu;
  62        const struct hisi_uncore_ops *ops;
  63        struct hisi_pmu_hwevents pmu_events;
  64        /* associated_cpus: All CPUs associated with the PMU */
  65        cpumask_t associated_cpus;
  66        /* CPU used for counting */
  67        int on_cpu;
  68        int irq;
  69        struct device *dev;
  70        struct hlist_node node;
  71        int sccl_id;
  72        int ccl_id;
  73        void __iomem *base;
  74        /* the ID of the PMU modules */
  75        u32 index_id;
  76        int num_counters;
  77        int counter_bits;
  78        /* check event code range */
  79        int check_event;
  80};
  81
  82int hisi_uncore_pmu_counter_valid(struct hisi_pmu *hisi_pmu, int idx);
  83int hisi_uncore_pmu_get_event_idx(struct perf_event *event);
  84void hisi_uncore_pmu_read(struct perf_event *event);
  85int hisi_uncore_pmu_add(struct perf_event *event, int flags);
  86void hisi_uncore_pmu_del(struct perf_event *event, int flags);
  87void hisi_uncore_pmu_start(struct perf_event *event, int flags);
  88void hisi_uncore_pmu_stop(struct perf_event *event, int flags);
  89void hisi_uncore_pmu_set_event_period(struct perf_event *event);
  90void hisi_uncore_pmu_event_update(struct perf_event *event);
  91int hisi_uncore_pmu_event_init(struct perf_event *event);
  92void hisi_uncore_pmu_enable(struct pmu *pmu);
  93void hisi_uncore_pmu_disable(struct pmu *pmu);
  94ssize_t hisi_event_sysfs_show(struct device *dev,
  95                              struct device_attribute *attr, char *buf);
  96ssize_t hisi_format_sysfs_show(struct device *dev,
  97                               struct device_attribute *attr, char *buf);
  98ssize_t hisi_cpumask_sysfs_show(struct device *dev,
  99                                struct device_attribute *attr, char *buf);
 100int hisi_uncore_pmu_online_cpu(unsigned int cpu, struct hlist_node *node);
 101int hisi_uncore_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node);
 102#endif /* __HISI_UNCORE_PMU_H__ */
 103