drivers/perf/hisilicon/hisi_uncore_pmu.h

   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
  39 struct hisi_pmu;
  40
  41 struct 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
  54 struct 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 */
  60 struct 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
  82 int hisi_uncore_pmu_counter_valid(struct hisi_pmu *hisi_pmu, int idx);
  83 int hisi_uncore_pmu_get_event_idx(struct perf_event *event);
  84 void hisi_uncore_pmu_read(struct perf_event *event);
  85 int hisi_uncore_pmu_add(struct perf_event *event, int flags);
  86 void hisi_uncore_pmu_del(struct perf_event *event, int flags);
  87 void hisi_uncore_pmu_start(struct perf_event *event, int flags);
  88 void hisi_uncore_pmu_stop(struct perf_event *event, int flags);
  89 void hisi_uncore_pmu_set_event_period(struct perf_event *event);
  90 void hisi_uncore_pmu_event_update(struct perf_event *event);
  91 int hisi_uncore_pmu_event_init(struct perf_event *event);
  92 void hisi_uncore_pmu_enable(struct pmu *pmu);
  93 void hisi_uncore_pmu_disable(struct pmu *pmu);
  94 ssize_t hisi_event_sysfs_show(struct device *dev,
  95                               struct device_attribute *attr, char *buf);
  96 ssize_t hisi_format_sysfs_show(struct device *dev,
  97                                struct device_attribute *attr, char *buf);
  98 ssize_t hisi_cpumask_sysfs_show(struct device *dev,
  99                                 struct device_attribute *attr, char *buf);
 100 int hisi_uncore_pmu_online_cpu(unsigned int cpu, struct hlist_node *node);
 101 int hisi_uncore_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node);
 102 #endif /* __HISI_UNCORE_PMU_H__ */