drivers/perf/hisilicon/hisi_uncore_pmu.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * HiSilicon SoC Hardware event counters support
   4  *
   5  * Copyright (C) 2017 Hisilicon Limited
   6  * Author: Anurup M <anurup.m@huawei.com>
   7  *         Shaokun Zhang <zhangshaokun@hisilicon.com>
   8  *
   9  * This code is based on the uncore PMUs like arm-cci and arm-ccn.
  10  */
  11 #ifndef __HISI_UNCORE_PMU_H__
  12 #define __HISI_UNCORE_PMU_H__
  13
  14 #include <linux/cpumask.h>
  15 #include <linux/device.h>
  16 #include <linux/kernel.h>
  17 #include <linux/module.h>
  18 #include <linux/perf_event.h>
  19 #include <linux/types.h>
  20
  21 #undef pr_fmt
  22 #define pr_fmt(fmt)     "hisi_pmu: " fmt
  23
  24 #define HISI_MAX_COUNTERS 0x10
  25 #define to_hisi_pmu(p)  (container_of(p, struct hisi_pmu, pmu))
  26
  27 #define HISI_PMU_ATTR(_name, _func, _config)                            \
  28         (&((struct dev_ext_attribute[]) {                               \
  29                 { __ATTR(_name, 0444, _func, NULL), (void *)_config }   \
  30         })[0].attr.attr)
  31
  32 #define HISI_PMU_FORMAT_ATTR(_name, _config)            \
  33         HISI_PMU_ATTR(_name, hisi_format_sysfs_show, (void *)_config)
  34 #define HISI_PMU_EVENT_ATTR(_name, _config)             \
  35         HISI_PMU_ATTR(_name, hisi_event_sysfs_show, (unsigned long)_config)
  36
  37 struct hisi_pmu;
  38
  39 struct hisi_uncore_ops {
  40         void (*write_evtype)(struct hisi_pmu *, int, u32);
  41         int (*get_event_idx)(struct perf_event *);
  42         u64 (*read_counter)(struct hisi_pmu *, struct hw_perf_event *);
  43         void (*write_counter)(struct hisi_pmu *, struct hw_perf_event *, u64);
  44         void (*enable_counter)(struct hisi_pmu *, struct hw_perf_event *);
  45         void (*disable_counter)(struct hisi_pmu *, struct hw_perf_event *);
  46         void (*enable_counter_int)(struct hisi_pmu *, struct hw_perf_event *);
  47         void (*disable_counter_int)(struct hisi_pmu *, struct hw_perf_event *);
  48         void (*start_counters)(struct hisi_pmu *);
  49         void (*stop_counters)(struct hisi_pmu *);
  50 };
  51
  52 struct hisi_pmu_hwevents {
  53         struct perf_event *hw_events[HISI_MAX_COUNTERS];
  54         DECLARE_BITMAP(used_mask, HISI_MAX_COUNTERS);
  55 };
  56
  57 /* Generic pmu struct for different pmu types */
  58 struct hisi_pmu {
  59         struct pmu pmu;
  60         const struct hisi_uncore_ops *ops;
  61         struct hisi_pmu_hwevents pmu_events;
  62         /* associated_cpus: All CPUs associated with the PMU */
  63         cpumask_t associated_cpus;
  64         /* CPU used for counting */
  65         int on_cpu;
  66         int irq;
  67         struct device *dev;
  68         struct hlist_node node;
  69         int sccl_id;
  70         int ccl_id;
  71         void __iomem *base;
  72         /* the ID of the PMU modules */
  73         u32 index_id;
  74         int num_counters;
  75         int counter_bits;
  76         /* check event code range */
  77         int check_event;
  78         u32 identifier;
  79 };
  80
  81 int hisi_uncore_pmu_counter_valid(struct hisi_pmu *hisi_pmu, int idx);
  82 int hisi_uncore_pmu_get_event_idx(struct perf_event *event);
  83 void hisi_uncore_pmu_read(struct perf_event *event);
  84 int hisi_uncore_pmu_add(struct perf_event *event, int flags);
  85 void hisi_uncore_pmu_del(struct perf_event *event, int flags);
  86 void hisi_uncore_pmu_start(struct perf_event *event, int flags);
  87 void hisi_uncore_pmu_stop(struct perf_event *event, int flags);
  88 void hisi_uncore_pmu_set_event_period(struct perf_event *event);
  89 void hisi_uncore_pmu_event_update(struct perf_event *event);
  90 int hisi_uncore_pmu_event_init(struct perf_event *event);
  91 void hisi_uncore_pmu_enable(struct pmu *pmu);
  92 void hisi_uncore_pmu_disable(struct pmu *pmu);
  93 ssize_t hisi_event_sysfs_show(struct device *dev,
  94                               struct device_attribute *attr, char *buf);
  95 ssize_t hisi_format_sysfs_show(struct device *dev,
  96                                struct device_attribute *attr, char *buf);
  97 ssize_t hisi_cpumask_sysfs_show(struct device *dev,
  98                                 struct device_attribute *attr, char *buf);
  99 int hisi_uncore_pmu_online_cpu(unsigned int cpu, struct hlist_node *node);
 100 int hisi_uncore_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node);
 101
 102 ssize_t hisi_uncore_pmu_identifier_attr_show(struct device *dev,
 103                                              struct device_attribute *attr,
 104                                              char *page);
 105
 106
 107 #endif /* __HISI_UNCORE_PMU_H__ */