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/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> 22 23 #undef pr_fmt 24 #define pr_fmt(fmt) "hisi_pmu: " fmt 25 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)) 29 30 #define HISI_PMU_ATTR(_name, _func, _config) \ 31 (&((struct dev_ext_attribute[]) { \ 32 { __ATTR(_name, 0444, _func, NULL), (void *)_config } \ 33 })[0].attr.attr) 34 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) 39 40 #define HISI_PMU_EVENT_ATTR_EXTRACTOR(name, config, hi, lo) \ 41 static inline u32 hisi_get_##name(struct perf_event *event) \ 42 { \ 43 return FIELD_GET(GENMASK_ULL(hi, lo), event->attr.config); \ 44 } 45 46 struct hisi_pmu; 47 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); 63 }; 64 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; 69 }; 70 71 /* Generic pmu struct for different pmu types */ 72 struct hisi_pmu { 73 struct pmu pmu; 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 */ 79 int on_cpu; 80 int irq; 81 struct device *dev; 82 struct hlist_node node; 83 int sccl_id; 84 int sicl_id; 85 int ccl_id; 86 void __iomem *base; 87 /* the ID of the PMU modules */ 88 u32 index_id; 89 /* For DDRC PMU v2: each DDRC has more than one DMC */ 90 u32 sub_id; 91 int num_counters; 92 int counter_bits; 93 /* check event code range */ 94 int check_event; 95 u32 identifier; 96 }; 97 98 int hisi_uncore_pmu_get_event_idx(struct perf_event *event); 99 void hisi_uncore_pmu_read(struct perf_event *event); 100 int hisi_uncore_pmu_add(struct perf_event *event, int flags); 101 void hisi_uncore_pmu_del(struct perf_event *event, int flags); 102 void hisi_uncore_pmu_start(struct perf_event *event, int flags); 103 void hisi_uncore_pmu_stop(struct perf_event *event, int flags); 104 void hisi_uncore_pmu_set_event_period(struct perf_event *event); 105 void hisi_uncore_pmu_event_update(struct perf_event *event); 106 int hisi_uncore_pmu_event_init(struct perf_event *event); 107 void hisi_uncore_pmu_enable(struct pmu *pmu); 108 void hisi_uncore_pmu_disable(struct pmu *pmu); 109 ssize_t hisi_event_sysfs_show(struct device *dev, 110 struct device_attribute *attr, char *buf); 111 ssize_t hisi_format_sysfs_show(struct device *dev, 112 struct device_attribute *attr, char *buf); 113 ssize_t hisi_cpumask_sysfs_show(struct device *dev, 114 struct device_attribute *attr, char *buf); 115 int hisi_uncore_pmu_online_cpu(unsigned int cpu, struct hlist_node *node); 116 int hisi_uncore_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node); 117 118 ssize_t hisi_uncore_pmu_identifier_attr_show(struct device *dev, 119 struct device_attribute *attr, 120 char *page); 121 int hisi_uncore_pmu_init_irq(struct hisi_pmu *hisi_pmu, 122 struct platform_device *pdev); 123 124 void hisi_pmu_init(struct hisi_pmu *hisi_pmu, struct module *module); 125 #endif /* __HISI_UNCORE_PMU_H__ */ 126