158 lines
4.1 KiB
C
158 lines
4.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Data types and headers for RAPL support
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*
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* Copyright (C) 2019 Intel Corporation.
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*
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* Author: Zhang Rui <rui.zhang@intel.com>
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*/
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#ifndef __INTEL_RAPL_H__
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#define __INTEL_RAPL_H__
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#include <linux/types.h>
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#include <linux/powercap.h>
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#include <linux/cpuhotplug.h>
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enum rapl_domain_type {
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RAPL_DOMAIN_PACKAGE, /* entire package/socket */
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RAPL_DOMAIN_PP0, /* core power plane */
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RAPL_DOMAIN_PP1, /* graphics uncore */
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RAPL_DOMAIN_DRAM, /* DRAM control_type */
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RAPL_DOMAIN_PLATFORM, /* PSys control_type */
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RAPL_DOMAIN_MAX,
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};
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enum rapl_domain_reg_id {
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RAPL_DOMAIN_REG_LIMIT,
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RAPL_DOMAIN_REG_STATUS,
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RAPL_DOMAIN_REG_PERF,
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RAPL_DOMAIN_REG_POLICY,
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RAPL_DOMAIN_REG_INFO,
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RAPL_DOMAIN_REG_PL4,
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RAPL_DOMAIN_REG_MAX,
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};
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struct rapl_domain;
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enum rapl_primitives {
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ENERGY_COUNTER,
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POWER_LIMIT1,
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POWER_LIMIT2,
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POWER_LIMIT4,
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FW_LOCK,
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PL1_ENABLE, /* power limit 1, aka long term */
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PL1_CLAMP, /* allow frequency to go below OS request */
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PL2_ENABLE, /* power limit 2, aka short term, instantaneous */
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PL2_CLAMP,
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PL4_ENABLE, /* power limit 4, aka max peak power */
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TIME_WINDOW1, /* long term */
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TIME_WINDOW2, /* short term */
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THERMAL_SPEC_POWER,
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MAX_POWER,
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MIN_POWER,
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MAX_TIME_WINDOW,
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THROTTLED_TIME,
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PRIORITY_LEVEL,
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/* below are not raw primitive data */
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AVERAGE_POWER,
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NR_RAPL_PRIMITIVES,
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};
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struct rapl_domain_data {
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u64 primitives[NR_RAPL_PRIMITIVES];
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unsigned long timestamp;
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};
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#define NR_POWER_LIMITS (3)
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struct rapl_power_limit {
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struct powercap_zone_constraint *constraint;
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int prim_id; /* primitive ID used to enable */
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struct rapl_domain *domain;
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const char *name;
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u64 last_power_limit;
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};
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struct rapl_package;
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#define RAPL_DOMAIN_NAME_LENGTH 16
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struct rapl_domain {
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char name[RAPL_DOMAIN_NAME_LENGTH];
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enum rapl_domain_type id;
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u64 regs[RAPL_DOMAIN_REG_MAX];
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struct powercap_zone power_zone;
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struct rapl_domain_data rdd;
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struct rapl_power_limit rpl[NR_POWER_LIMITS];
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u64 attr_map; /* track capabilities */
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unsigned int state;
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unsigned int domain_energy_unit;
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struct rapl_package *rp;
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};
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struct reg_action {
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u64 reg;
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u64 mask;
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u64 value;
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int err;
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};
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/**
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* struct rapl_if_priv: private data for different RAPL interfaces
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* @control_type: Each RAPL interface must have its own powercap
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* control type.
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* @platform_rapl_domain: Optional. Some RAPL interface may have platform
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* level RAPL control.
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* @pcap_rapl_online: CPU hotplug state for each RAPL interface.
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* @reg_unit: Register for getting energy/power/time unit.
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* @regs: Register sets for different RAPL Domains.
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* @limits: Number of power limits supported by each domain.
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* @read_raw: Callback for reading RAPL interface specific
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* registers.
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* @write_raw: Callback for writing RAPL interface specific
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* registers.
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*/
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struct rapl_if_priv {
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struct powercap_control_type *control_type;
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struct rapl_domain *platform_rapl_domain;
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enum cpuhp_state pcap_rapl_online;
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u64 reg_unit;
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u64 regs[RAPL_DOMAIN_MAX][RAPL_DOMAIN_REG_MAX];
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int limits[RAPL_DOMAIN_MAX];
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int (*read_raw)(int cpu, struct reg_action *ra);
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int (*write_raw)(int cpu, struct reg_action *ra);
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};
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/* maximum rapl package domain name: package-%d-die-%d */
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#define PACKAGE_DOMAIN_NAME_LENGTH 30
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struct rapl_package {
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unsigned int id; /* logical die id, equals physical 1-die systems */
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unsigned int nr_domains;
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unsigned long domain_map; /* bit map of active domains */
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unsigned int power_unit;
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unsigned int energy_unit;
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unsigned int time_unit;
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struct rapl_domain *domains; /* array of domains, sized at runtime */
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struct powercap_zone *power_zone; /* keep track of parent zone */
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unsigned long power_limit_irq; /* keep track of package power limit
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* notify interrupt enable status.
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*/
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struct list_head plist;
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int lead_cpu; /* one active cpu per package for access */
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/* Track active cpus */
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struct cpumask cpumask;
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char name[PACKAGE_DOMAIN_NAME_LENGTH];
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struct rapl_if_priv *priv;
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};
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struct rapl_package *rapl_find_package_domain(int cpu, struct rapl_if_priv *priv);
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struct rapl_package *rapl_add_package(int cpu, struct rapl_if_priv *priv);
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void rapl_remove_package(struct rapl_package *rp);
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#endif /* __INTEL_RAPL_H__ */
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