include/linux/intel_rapl.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  *  Data types and headers for RAPL support
   4  *
   5  *  Copyright (C) 2019  Intel Corporation.
   6  *
   7  *  Author: Zhang Rui <rui.zhang@intel.com>
   8  */
   9
  10 #ifndef __INTEL_RAPL_H__
  11 #define __INTEL_RAPL_H__
  12
  13 #include <linux/types.h>
  14 #include <linux/powercap.h>
  15 #include <linux/cpuhotplug.h>
  16
  17 enum rapl_if_type {
  18         RAPL_IF_MSR,    /* RAPL I/F using MSR registers */
  19         RAPL_IF_MMIO,   /* RAPL I/F using MMIO registers */
  20         RAPL_IF_TPMI,   /* RAPL I/F using TPMI registers */
  21 };
  22
  23 enum rapl_domain_type {
  24         RAPL_DOMAIN_PACKAGE,    /* entire package/socket */
  25         RAPL_DOMAIN_PP0,        /* core power plane */
  26         RAPL_DOMAIN_PP1,        /* graphics uncore */
  27         RAPL_DOMAIN_DRAM,       /* DRAM control_type */
  28         RAPL_DOMAIN_PLATFORM,   /* PSys control_type */
  29         RAPL_DOMAIN_MAX,
  30 };
  31
  32 enum rapl_domain_reg_id {
  33         RAPL_DOMAIN_REG_LIMIT,
  34         RAPL_DOMAIN_REG_STATUS,
  35         RAPL_DOMAIN_REG_PERF,
  36         RAPL_DOMAIN_REG_POLICY,
  37         RAPL_DOMAIN_REG_INFO,
  38         RAPL_DOMAIN_REG_PL4,
  39         RAPL_DOMAIN_REG_UNIT,
  40         RAPL_DOMAIN_REG_PL2,
  41         RAPL_DOMAIN_REG_MAX,
  42 };
  43
  44 struct rapl_domain;
  45
  46 enum rapl_primitives {
  47         POWER_LIMIT1,
  48         POWER_LIMIT2,
  49         POWER_LIMIT4,
  50         ENERGY_COUNTER,
  51         FW_LOCK,
  52         FW_HIGH_LOCK,
  53         PL1_LOCK,
  54         PL2_LOCK,
  55         PL4_LOCK,
  56
  57         PL1_ENABLE,             /* power limit 1, aka long term */
  58         PL1_CLAMP,              /* allow frequency to go below OS request */
  59         PL2_ENABLE,             /* power limit 2, aka short term, instantaneous */
  60         PL2_CLAMP,
  61         PL4_ENABLE,             /* power limit 4, aka max peak power */
  62
  63         TIME_WINDOW1,           /* long term */
  64         TIME_WINDOW2,           /* short term */
  65         THERMAL_SPEC_POWER,
  66         MAX_POWER,
  67
  68         MIN_POWER,
  69         MAX_TIME_WINDOW,
  70         THROTTLED_TIME,
  71         PRIORITY_LEVEL,
  72
  73         PSYS_POWER_LIMIT1,
  74         PSYS_POWER_LIMIT2,
  75         PSYS_PL1_ENABLE,
  76         PSYS_PL2_ENABLE,
  77         PSYS_TIME_WINDOW1,
  78         PSYS_TIME_WINDOW2,
  79         /* below are not raw primitive data */
  80         AVERAGE_POWER,
  81         NR_RAPL_PRIMITIVES,
  82 };
  83
  84 struct rapl_domain_data {
  85         u64 primitives[NR_RAPL_PRIMITIVES];
  86         unsigned long timestamp;
  87 };
  88
  89 #define NR_POWER_LIMITS (POWER_LIMIT4 + 1)
  90
  91 struct rapl_power_limit {
  92         struct powercap_zone_constraint *constraint;
  93         struct rapl_domain *domain;
  94         const char *name;
  95         bool locked;
  96         u64 last_power_limit;
  97 };
  98
  99 struct rapl_package;
 100
 101 #define RAPL_DOMAIN_NAME_LENGTH 16
 102
 103 union rapl_reg {
 104         void __iomem *mmio;
 105         u32 msr;
 106         u64 val;
 107 };
 108
 109 struct rapl_domain {
 110         char name[RAPL_DOMAIN_NAME_LENGTH];
 111         enum rapl_domain_type id;
 112         union rapl_reg regs[RAPL_DOMAIN_REG_MAX];
 113         struct powercap_zone power_zone;
 114         struct rapl_domain_data rdd;
 115         struct rapl_power_limit rpl[NR_POWER_LIMITS];
 116         u64 attr_map;           /* track capabilities */
 117         unsigned int state;
 118         unsigned int power_unit;
 119         unsigned int energy_unit;
 120         unsigned int time_unit;
 121         struct rapl_package *rp;
 122 };
 123
 124 struct reg_action {
 125         union rapl_reg reg;
 126         u64 mask;
 127         u64 value;
 128         int err;
 129 };
 130
 131 /**
 132  * struct rapl_if_priv: private data for different RAPL interfaces
 133  * @control_type:               Each RAPL interface must have its own powercap
 134  *                              control type.
 135  * @platform_rapl_domain:       Optional. Some RAPL interface may have platform
 136  *                              level RAPL control.
 137  * @pcap_rapl_online:           CPU hotplug state for each RAPL interface.
 138  * @reg_unit:                   Register for getting energy/power/time unit.
 139  * @regs:                       Register sets for different RAPL Domains.
 140  * @limits:                     Number of power limits supported by each domain.
 141  * @read_raw:                   Callback for reading RAPL interface specific
 142  *                              registers.
 143  * @write_raw:                  Callback for writing RAPL interface specific
 144  *                              registers.
 145  * @defaults:                   internal pointer to interface default settings
 146  * @rpi:                        internal pointer to interface primitive info
 147  */
 148 struct rapl_if_priv {
 149         enum rapl_if_type type;
 150         struct powercap_control_type *control_type;
 151         enum cpuhp_state pcap_rapl_online;
 152         union rapl_reg reg_unit;
 153         union rapl_reg regs[RAPL_DOMAIN_MAX][RAPL_DOMAIN_REG_MAX];
 154         int limits[RAPL_DOMAIN_MAX];
 155         int (*read_raw)(int id, struct reg_action *ra);
 156         int (*write_raw)(int id, struct reg_action *ra);
 157         void *defaults;
 158         void *rpi;
 159 };
 160
 161 #ifdef CONFIG_PERF_EVENTS
 162 /**
 163  * struct rapl_package_pmu_data: Per package data for PMU support
 164  * @scale:              Scale of 2^-32 Joules for each energy counter increase.
 165  * @lock:               Lock to protect n_active and active_list.
 166  * @n_active:           Number of active events.
 167  * @active_list:        List of active events.
 168  * @timer_interval:     Maximum timer expiration time before counter overflow.
 169  * @hrtimer:            Periodically update the counter to prevent overflow.
 170  */
 171 struct rapl_package_pmu_data {
 172         u64 scale[RAPL_DOMAIN_MAX];
 173         raw_spinlock_t lock;
 174         int n_active;
 175         struct list_head active_list;
 176         ktime_t timer_interval;
 177         struct hrtimer hrtimer;
 178 };
 179 #endif
 180
 181 /* maximum rapl package domain name: package-%d-die-%d */
 182 #define PACKAGE_DOMAIN_NAME_LENGTH 30
 183
 184 struct rapl_package {
 185         unsigned int id;        /* logical die id, equals physical 1-die systems */
 186         unsigned int nr_domains;
 187         unsigned long domain_map;       /* bit map of active domains */
 188         struct rapl_domain *domains;    /* array of domains, sized at runtime */
 189         struct powercap_zone *power_zone;       /* keep track of parent zone */
 190         unsigned long power_limit_irq;  /* keep track of package power limit
 191                                          * notify interrupt enable status.
 192                                          */
 193         struct list_head plist;
 194         int lead_cpu;           /* one active cpu per package for access */
 195         /* Track active cpus */
 196         struct cpumask cpumask;
 197         char name[PACKAGE_DOMAIN_NAME_LENGTH];
 198         struct rapl_if_priv *priv;
 199 #ifdef CONFIG_PERF_EVENTS
 200         bool has_pmu;
 201         struct rapl_package_pmu_data pmu_data;
 202 #endif
 203 };
 204
 205 struct rapl_package *rapl_find_package_domain_cpuslocked(int id, struct rapl_if_priv *priv,
 206                                                        bool id_is_cpu);
 207 struct rapl_package *rapl_add_package_cpuslocked(int id, struct rapl_if_priv *priv,
 208                                                  bool id_is_cpu);
 209 void rapl_remove_package_cpuslocked(struct rapl_package *rp);
 210
 211 struct rapl_package *rapl_find_package_domain(int id, struct rapl_if_priv *priv, bool id_is_cpu);
 212 struct rapl_package *rapl_add_package(int id, struct rapl_if_priv *priv, bool id_is_cpu);
 213 void rapl_remove_package(struct rapl_package *rp);
 214
 215 #ifdef CONFIG_PERF_EVENTS
 216 int rapl_package_add_pmu(struct rapl_package *rp);
 217 void rapl_package_remove_pmu(struct rapl_package *rp);
 218 #else
 219 static inline int rapl_package_add_pmu(struct rapl_package *rp) { return 0; }
 220 static inline void rapl_package_remove_pmu(struct rapl_package *rp) { }
 221 #endif
 222
 223 #endif /* __INTEL_RAPL_H__ */