1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Data types and headers for RAPL support
5 * Copyright (C) 2019 Intel Corporation.
10 #ifndef __INTEL_RAPL_H__
11 #define __INTEL_RAPL_H__
13 #include <linux/types.h>
14 #include <linux/powercap.h>
15 #include <linux/cpuhotplug.h>
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 */
26 enum rapl_domain_reg_id {
27 RAPL_DOMAIN_REG_LIMIT,
28 RAPL_DOMAIN_REG_STATUS,
30 RAPL_DOMAIN_REG_POLICY,
38 enum rapl_primitives {
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 */
49 PL4_ENABLE, /* power limit 4, aka max peak power */
51 TIME_WINDOW1, /* long term */
52 TIME_WINDOW2, /* short term */
61 /* below are not raw primitive data */
66 struct rapl_domain_data {
67 u64 primitives[NR_RAPL_PRIMITIVES];
68 unsigned long timestamp;
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;
82 #define RAPL_DOMAIN_NAME_LENGTH 16
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 */
93 unsigned int domain_energy_unit;
94 struct rapl_package *rp;
105 * struct rapl_if_priv: private data for different RAPL interfaces
106 * @control_type: Each RAPL interface must have its own powercap
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
116 * @write_raw: Callback for writing RAPL interface specific
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;
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);
130 /* maximum rapl package domain name: package-%d-die-%d */
131 #define PACKAGE_DOMAIN_NAME_LENGTH 30
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.
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;
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);
157 #endif /* __INTEL_RAPL_H__ */