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/bitfield.h>
15 #include <linux/cpumask.h>
16 #include <linux/device.h>
17 #include <linux/kernel.h>
18 #include <linux/module.h>
19 #include <linux/perf_event.h>
20 #include <linux/platform_device.h>
21 #include <linux/types.h>
24 #define pr_fmt(fmt) "hisi_pmu: " fmt
26 #define HISI_PMU_V2 0x30
27 #define HISI_MAX_COUNTERS 0x10
28 #define to_hisi_pmu(p) (container_of(p, struct hisi_pmu, pmu))
30 #define HISI_PMU_ATTR(_name, _func, _config) \
31 (&((struct dev_ext_attribute[]) { \
32 { __ATTR(_name, 0444, _func, NULL), (void *)_config } \
35 #define HISI_PMU_FORMAT_ATTR(_name, _config) \
36 HISI_PMU_ATTR(_name, hisi_format_sysfs_show, (void *)_config)
37 #define HISI_PMU_EVENT_ATTR(_name, _config) \
38 HISI_PMU_ATTR(_name, hisi_event_sysfs_show, (unsigned long)_config)
40 #define HISI_PMU_EVENT_ATTR_EXTRACTOR(name, config, hi, lo) \
41 static inline u32 hisi_get_##name(struct perf_event *event) \
43 return FIELD_GET(GENMASK_ULL(hi, lo), event->attr.config); \
48 struct hisi_uncore_ops {
49 void (*write_evtype)(struct hisi_pmu *, int, u32);
50 int (*get_event_idx)(struct perf_event *);
51 u64 (*read_counter)(struct hisi_pmu *, struct hw_perf_event *);
52 void (*write_counter)(struct hisi_pmu *, struct hw_perf_event *, u64);
53 void (*enable_counter)(struct hisi_pmu *, struct hw_perf_event *);
54 void (*disable_counter)(struct hisi_pmu *, struct hw_perf_event *);
55 void (*enable_counter_int)(struct hisi_pmu *, struct hw_perf_event *);
56 void (*disable_counter_int)(struct hisi_pmu *, struct hw_perf_event *);
57 void (*start_counters)(struct hisi_pmu *);
58 void (*stop_counters)(struct hisi_pmu *);
59 u32 (*get_int_status)(struct hisi_pmu *hisi_pmu);
60 void (*clear_int_status)(struct hisi_pmu *hisi_pmu, int idx);
61 void (*enable_filter)(struct perf_event *event);
62 void (*disable_filter)(struct perf_event *event);
65 struct hisi_pmu_hwevents {
66 struct perf_event *hw_events[HISI_MAX_COUNTERS];
67 DECLARE_BITMAP(used_mask, HISI_MAX_COUNTERS);
68 const struct attribute_group **attr_groups;
71 /* Generic pmu struct for different pmu types */
74 const struct hisi_uncore_ops *ops;
75 struct hisi_pmu_hwevents pmu_events;
76 /* associated_cpus: All CPUs associated with the PMU */
77 cpumask_t associated_cpus;
78 /* CPU used for counting */
82 struct hlist_node node;
86 /* the ID of the PMU modules */
88 /* For DDRC PMU v2: each DDRC has more than one DMC */
92 /* check event code range */
97 int hisi_uncore_pmu_get_event_idx(struct perf_event *event);
98 void hisi_uncore_pmu_read(struct perf_event *event);
99 int hisi_uncore_pmu_add(struct perf_event *event, int flags);
100 void hisi_uncore_pmu_del(struct perf_event *event, int flags);
101 void hisi_uncore_pmu_start(struct perf_event *event, int flags);
102 void hisi_uncore_pmu_stop(struct perf_event *event, int flags);
103 void hisi_uncore_pmu_set_event_period(struct perf_event *event);
104 void hisi_uncore_pmu_event_update(struct perf_event *event);
105 int hisi_uncore_pmu_event_init(struct perf_event *event);
106 void hisi_uncore_pmu_enable(struct pmu *pmu);
107 void hisi_uncore_pmu_disable(struct pmu *pmu);
108 ssize_t hisi_event_sysfs_show(struct device *dev,
109 struct device_attribute *attr, char *buf);
110 ssize_t hisi_format_sysfs_show(struct device *dev,
111 struct device_attribute *attr, char *buf);
112 ssize_t hisi_cpumask_sysfs_show(struct device *dev,
113 struct device_attribute *attr, char *buf);
114 int hisi_uncore_pmu_online_cpu(unsigned int cpu, struct hlist_node *node);
115 int hisi_uncore_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node);
117 ssize_t hisi_uncore_pmu_identifier_attr_show(struct device *dev,
118 struct device_attribute *attr,
120 int hisi_uncore_pmu_init_irq(struct hisi_pmu *hisi_pmu,
121 struct platform_device *pdev);
123 #endif /* __HISI_UNCORE_PMU_H__ */