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__ */ 158