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 */
67 /* below are not raw primitive data */
72 struct rapl_domain_data {
73 u64 primitives[NR_RAPL_PRIMITIVES];
74 unsigned long timestamp;
77 #define NR_POWER_LIMITS (3)
78 struct rapl_power_limit {
79 struct powercap_zone_constraint *constraint;
80 int prim_id; /* primitive ID used to enable */
81 struct rapl_domain *domain;
88 #define RAPL_DOMAIN_NAME_LENGTH 16
91 char name[RAPL_DOMAIN_NAME_LENGTH];
92 enum rapl_domain_type id;
93 u64 regs[RAPL_DOMAIN_REG_MAX];
94 struct powercap_zone power_zone;
95 struct rapl_domain_data rdd;
96 struct rapl_power_limit rpl[NR_POWER_LIMITS];
97 u64 attr_map; /* track capabilities */
99 unsigned int domain_energy_unit;
100 struct rapl_package *rp;
111 * struct rapl_if_priv: private data for different RAPL interfaces
112 * @control_type: Each RAPL interface must have its own powercap
114 * @platform_rapl_domain: Optional. Some RAPL interface may have platform
115 * level RAPL control.
116 * @pcap_rapl_online: CPU hotplug state for each RAPL interface.
117 * @reg_unit: Register for getting energy/power/time unit.
118 * @regs: Register sets for different RAPL Domains.
119 * @limits: Number of power limits supported by each domain.
120 * @read_raw: Callback for reading RAPL interface specific
122 * @write_raw: Callback for writing RAPL interface specific
125 struct rapl_if_priv {
126 struct powercap_control_type *control_type;
127 struct rapl_domain *platform_rapl_domain;
128 enum cpuhp_state pcap_rapl_online;
130 u64 regs[RAPL_DOMAIN_MAX][RAPL_DOMAIN_REG_MAX];
131 int limits[RAPL_DOMAIN_MAX];
132 int (*read_raw)(int cpu, struct reg_action *ra);
133 int (*write_raw)(int cpu, struct reg_action *ra);
136 /* maximum rapl package domain name: package-%d-die-%d */
137 #define PACKAGE_DOMAIN_NAME_LENGTH 30
139 struct rapl_package {
140 unsigned int id; /* logical die id, equals physical 1-die systems */
141 unsigned int nr_domains;
142 unsigned long domain_map; /* bit map of active domains */
143 unsigned int power_unit;
144 unsigned int energy_unit;
145 unsigned int time_unit;
146 struct rapl_domain *domains; /* array of domains, sized at runtime */
147 struct powercap_zone *power_zone; /* keep track of parent zone */
148 unsigned long power_limit_irq; /* keep track of package power limit
149 * notify interrupt enable status.
151 struct list_head plist;
152 int lead_cpu; /* one active cpu per package for access */
153 /* Track active cpus */
154 struct cpumask cpumask;
155 char name[PACKAGE_DOMAIN_NAME_LENGTH];
156 struct rapl_if_priv *priv;
159 struct rapl_package *rapl_find_package_domain(int cpu, struct rapl_if_priv *priv);
160 struct rapl_package *rapl_add_package(int cpu, struct rapl_if_priv *priv);
161 void rapl_remove_package(struct rapl_package *rp);
163 #endif /* __INTEL_RAPL_H__ */