root/include/linux/intel_rapl.h

INCLUDED FROM

   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_domain_type {
  18         RAPL_DOMAIN_PACKAGE,    /* entire package/socket */
  19         RAPL_DOMAIN_PP0,        /* core power plane */
  20         RAPL_DOMAIN_PP1,        /* graphics uncore */
  21         RAPL_DOMAIN_DRAM,       /* DRAM control_type */
  22         RAPL_DOMAIN_PLATFORM,   /* PSys control_type */
  23         RAPL_DOMAIN_MAX,
  24 };
  25 
  26 enum rapl_domain_reg_id {
  27         RAPL_DOMAIN_REG_LIMIT,
  28         RAPL_DOMAIN_REG_STATUS,
  29         RAPL_DOMAIN_REG_PERF,
  30         RAPL_DOMAIN_REG_POLICY,
  31         RAPL_DOMAIN_REG_INFO,
  32         RAPL_DOMAIN_REG_MAX,
  33 };
  34 
  35 struct rapl_package;
  36 
  37 enum rapl_primitives {
  38         ENERGY_COUNTER,
  39         POWER_LIMIT1,
  40         POWER_LIMIT2,
  41         FW_LOCK,
  42 
  43         PL1_ENABLE,             /* power limit 1, aka long term */
  44         PL1_CLAMP,              /* allow frequency to go below OS request */
  45         PL2_ENABLE,             /* power limit 2, aka short term, instantaneous */
  46         PL2_CLAMP,
  47 
  48         TIME_WINDOW1,           /* long term */
  49         TIME_WINDOW2,           /* short term */
  50         THERMAL_SPEC_POWER,
  51         MAX_POWER,
  52 
  53         MIN_POWER,
  54         MAX_TIME_WINDOW,
  55         THROTTLED_TIME,
  56         PRIORITY_LEVEL,
  57 
  58         /* below are not raw primitive data */
  59         AVERAGE_POWER,
  60         NR_RAPL_PRIMITIVES,
  61 };
  62 
  63 struct rapl_domain_data {
  64         u64 primitives[NR_RAPL_PRIMITIVES];
  65         unsigned long timestamp;
  66 };
  67 
  68 #define NR_POWER_LIMITS (2)
  69 struct rapl_power_limit {
  70         struct powercap_zone_constraint *constraint;
  71         int prim_id;            /* primitive ID used to enable */
  72         struct rapl_domain *domain;
  73         const char *name;
  74         u64 last_power_limit;
  75 };
  76 
  77 struct rapl_package;
  78 
  79 struct rapl_domain {
  80         const char *name;
  81         enum rapl_domain_type id;
  82         u64 regs[RAPL_DOMAIN_REG_MAX];
  83         struct powercap_zone power_zone;
  84         struct rapl_domain_data rdd;
  85         struct rapl_power_limit rpl[NR_POWER_LIMITS];
  86         u64 attr_map;           /* track capabilities */
  87         unsigned int state;
  88         unsigned int domain_energy_unit;
  89         struct rapl_package *rp;
  90 };
  91 
  92 struct reg_action {
  93         u64 reg;
  94         u64 mask;
  95         u64 value;
  96         int err;
  97 };
  98 
  99 /**
 100  * struct rapl_if_priv: private data for different RAPL interfaces
 101  * @control_type:               Each RAPL interface must have its own powercap
 102  *                              control type.
 103  * @platform_rapl_domain:       Optional. Some RAPL interface may have platform
 104  *                              level RAPL control.
 105  * @pcap_rapl_online:           CPU hotplug state for each RAPL interface.
 106  * @reg_unit:                   Register for getting energy/power/time unit.
 107  * @regs:                       Register sets for different RAPL Domains.
 108  * @limits:                     Number of power limits supported by each domain.
 109  * @read_raw:                   Callback for reading RAPL interface specific
 110  *                              registers.
 111  * @write_raw:                  Callback for writing RAPL interface specific
 112  *                              registers.
 113  */
 114 struct rapl_if_priv {
 115         struct powercap_control_type *control_type;
 116         struct rapl_domain *platform_rapl_domain;
 117         enum cpuhp_state pcap_rapl_online;
 118         u64 reg_unit;
 119         u64 regs[RAPL_DOMAIN_MAX][RAPL_DOMAIN_REG_MAX];
 120         int limits[RAPL_DOMAIN_MAX];
 121         int (*read_raw)(int cpu, struct reg_action *ra);
 122         int (*write_raw)(int cpu, struct reg_action *ra);
 123 };
 124 
 125 /* maximum rapl package domain name: package-%d-die-%d */
 126 #define PACKAGE_DOMAIN_NAME_LENGTH 30
 127 
 128 struct rapl_package {
 129         unsigned int id;        /* logical die id, equals physical 1-die systems */
 130         unsigned int nr_domains;
 131         unsigned long domain_map;       /* bit map of active domains */
 132         unsigned int power_unit;
 133         unsigned int energy_unit;
 134         unsigned int time_unit;
 135         struct rapl_domain *domains;    /* array of domains, sized at runtime */
 136         struct powercap_zone *power_zone;       /* keep track of parent zone */
 137         unsigned long power_limit_irq;  /* keep track of package power limit
 138                                          * notify interrupt enable status.
 139                                          */
 140         struct list_head plist;
 141         int lead_cpu;           /* one active cpu per package for access */
 142         /* Track active cpus */
 143         struct cpumask cpumask;
 144         char name[PACKAGE_DOMAIN_NAME_LENGTH];
 145         struct rapl_if_priv *priv;
 146 };
 147 
 148 struct rapl_package *rapl_find_package_domain(int cpu, struct rapl_if_priv *priv);
 149 struct rapl_package *rapl_add_package(int cpu, struct rapl_if_priv *priv);
 150 void rapl_remove_package(struct rapl_package *rp);
 151 
 152 int rapl_add_platform_domain(struct rapl_if_priv *priv);
 153 void rapl_remove_platform_domain(struct rapl_if_priv *priv);
 154 
 155 #endif /* __INTEL_RAPL_H__ */