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_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_PL4,
  33         RAPL_DOMAIN_REG_MAX,
  34 };
  35
  36 struct rapl_domain;
  37
  38 enum rapl_primitives {
  39         ENERGY_COUNTER,
  40         POWER_LIMIT1,
  41         POWER_LIMIT2,
  42         POWER_LIMIT4,
  43         FW_LOCK,
  44
  45         PL1_ENABLE,             /* power limit 1, aka long term */
  46         PL1_CLAMP,              /* allow frequency to go below OS request */
  47         PL2_ENABLE,             /* power limit 2, aka short term, instantaneous */
  48         PL2_CLAMP,
  49         PL4_ENABLE,             /* power limit 4, aka max peak power */
  50
  51         TIME_WINDOW1,           /* long term */
  52         TIME_WINDOW2,           /* short term */
  53         THERMAL_SPEC_POWER,
  54         MAX_POWER,
  55
  56         MIN_POWER,
  57         MAX_TIME_WINDOW,
  58         THROTTLED_TIME,
  59         PRIORITY_LEVEL,
  60
  61         /* below are not raw primitive data */
  62         AVERAGE_POWER,
  63         NR_RAPL_PRIMITIVES,
  64 };
  65
  66 struct rapl_domain_data {
  67         u64 primitives[NR_RAPL_PRIMITIVES];
  68         unsigned long timestamp;
  69 };
  70
  71 #define NR_POWER_LIMITS (3)
  72 struct rapl_power_limit {
  73         struct powercap_zone_constraint *constraint;
  74         int prim_id;            /* primitive ID used to enable */
  75         struct rapl_domain *domain;
  76         const char *name;
  77         u64 last_power_limit;
  78 };
  79
  80 struct rapl_package;
  81
  82 #define RAPL_DOMAIN_NAME_LENGTH 16
  83
  84 struct rapl_domain {
  85         char name[RAPL_DOMAIN_NAME_LENGTH];
  86         enum rapl_domain_type id;
  87         u64 regs[RAPL_DOMAIN_REG_MAX];
  88         struct powercap_zone power_zone;
  89         struct rapl_domain_data rdd;
  90         struct rapl_power_limit rpl[NR_POWER_LIMITS];
  91         u64 attr_map;           /* track capabilities */
  92         unsigned int state;
  93         unsigned int domain_energy_unit;
  94         struct rapl_package *rp;
  95 };
  96
  97 struct reg_action {
  98         u64 reg;
  99         u64 mask;
 100         u64 value;
 101         int err;
 102 };
 103
 104 /**
 105  * struct rapl_if_priv: private data for different RAPL interfaces
 106  * @control_type:               Each RAPL interface must have its own powercap
 107  *                              control type.
 108  * @platform_rapl_domain:       Optional. Some RAPL interface may have platform
 109  *                              level RAPL control.
 110  * @pcap_rapl_online:           CPU hotplug state for each RAPL interface.
 111  * @reg_unit:                   Register for getting energy/power/time unit.
 112  * @regs:                       Register sets for different RAPL Domains.
 113  * @limits:                     Number of power limits supported by each domain.
 114  * @read_raw:                   Callback for reading RAPL interface specific
 115  *                              registers.
 116  * @write_raw:                  Callback for writing RAPL interface specific
 117  *                              registers.
 118  */
 119 struct rapl_if_priv {
 120         struct powercap_control_type *control_type;
 121         struct rapl_domain *platform_rapl_domain;
 122         enum cpuhp_state pcap_rapl_online;
 123         u64 reg_unit;
 124         u64 regs[RAPL_DOMAIN_MAX][RAPL_DOMAIN_REG_MAX];
 125         int limits[RAPL_DOMAIN_MAX];
 126         int (*read_raw)(int cpu, struct reg_action *ra);
 127         int (*write_raw)(int cpu, struct reg_action *ra);
 128 };
 129
 130 /* maximum rapl package domain name: package-%d-die-%d */
 131 #define PACKAGE_DOMAIN_NAME_LENGTH 30
 132
 133 struct rapl_package {
 134         unsigned int id;        /* logical die id, equals physical 1-die systems */
 135         unsigned int nr_domains;
 136         unsigned long domain_map;       /* bit map of active domains */
 137         unsigned int power_unit;
 138         unsigned int energy_unit;
 139         unsigned int time_unit;
 140         struct rapl_domain *domains;    /* array of domains, sized at runtime */
 141         struct powercap_zone *power_zone;       /* keep track of parent zone */
 142         unsigned long power_limit_irq;  /* keep track of package power limit
 143                                          * notify interrupt enable status.
 144                                          */
 145         struct list_head plist;
 146         int lead_cpu;           /* one active cpu per package for access */
 147         /* Track active cpus */
 148         struct cpumask cpumask;
 149         char name[PACKAGE_DOMAIN_NAME_LENGTH];
 150         struct rapl_if_priv *priv;
 151 };
 152
 153 struct rapl_package *rapl_find_package_domain(int cpu, struct rapl_if_priv *priv);
 154 struct rapl_package *rapl_add_package(int cpu, struct rapl_if_priv *priv);
 155 void rapl_remove_package(struct rapl_package *rp);
 156
 157 #endif /* __INTEL_RAPL_H__ */