1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * HiSilicon SoC Hardware event counters support
5 * Copyright (C) 2017 Hisilicon Limited
6 * Author: Anurup M <anurup.m@huawei.com>
7 * Shaokun Zhang <zhangshaokun@hisilicon.com>
9 * This code is based on the uncore PMUs like arm-cci and arm-ccn.
11 #ifndef __HISI_UNCORE_PMU_H__
12 #define __HISI_UNCORE_PMU_H__
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>
22 #define pr_fmt(fmt) "hisi_pmu: " fmt
24 #define HISI_MAX_COUNTERS 0x10
25 #define to_hisi_pmu(p) (container_of(p, struct hisi_pmu, pmu))
27 #define HISI_PMU_ATTR(_name, _func, _config) \
28 (&((struct dev_ext_attribute[]) { \
29 { __ATTR(_name, 0444, _func, NULL), (void *)_config } \
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)
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 *);
52 struct hisi_pmu_hwevents {
53 struct perf_event *hw_events[HISI_MAX_COUNTERS];
54 DECLARE_BITMAP(used_mask, HISI_MAX_COUNTERS);
57 /* Generic pmu struct for different pmu types */
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 */
68 struct hlist_node node;
72 /* the ID of the PMU modules */
76 /* check event code range */
80 int hisi_uncore_pmu_counter_valid(struct hisi_pmu *hisi_pmu, int idx);
81 int hisi_uncore_pmu_get_event_idx(struct perf_event *event);
82 void hisi_uncore_pmu_read(struct perf_event *event);
83 int hisi_uncore_pmu_add(struct perf_event *event, int flags);
84 void hisi_uncore_pmu_del(struct perf_event *event, int flags);
85 void hisi_uncore_pmu_start(struct perf_event *event, int flags);
86 void hisi_uncore_pmu_stop(struct perf_event *event, int flags);
87 void hisi_uncore_pmu_set_event_period(struct perf_event *event);
88 void hisi_uncore_pmu_event_update(struct perf_event *event);
89 int hisi_uncore_pmu_event_init(struct perf_event *event);
90 void hisi_uncore_pmu_enable(struct pmu *pmu);
91 void hisi_uncore_pmu_disable(struct pmu *pmu);
92 ssize_t hisi_event_sysfs_show(struct device *dev,
93 struct device_attribute *attr, char *buf);
94 ssize_t hisi_format_sysfs_show(struct device *dev,
95 struct device_attribute *attr, char *buf);
96 ssize_t hisi_cpumask_sysfs_show(struct device *dev,
97 struct device_attribute *attr, char *buf);
98 int hisi_uncore_pmu_online_cpu(unsigned int cpu, struct hlist_node *node);
99 int hisi_uncore_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node);
100 #endif /* __HISI_UNCORE_PMU_H__ */