/* SPDX-License-Identifier: GPL-2.0 */
/*
* Data types and headers for RAPL support
*
* Copyright ( C ) 2019 Intel Corporation .
*
* Author : Zhang Rui < rui . zhang @ intel . com >
*/
#ifndef __INTEL_RAPL_H__
#define __INTEL_RAPL_H__
#include <linux/types.h>
#include <linux/powercap.h>
#include <linux/cpuhotplug.h>
enum rapl_if_type {
RAPL_IF_MSR, /* RAPL I/F using MSR registers */
RAPL_IF_MMIO, /* RAPL I/F using MMIO registers */
RAPL_IF_TPMI, /* RAPL I/F using TPMI registers */
};
enum rapl_domain_type {
RAPL_DOMAIN_PACKAGE, /* entire package/socket */
RAPL_DOMAIN_PP0, /* core power plane */
RAPL_DOMAIN_PP1, /* graphics uncore */
RAPL_DOMAIN_DRAM, /* DRAM control_type */
RAPL_DOMAIN_PLATFORM, /* PSys control_type */
RAPL_DOMAIN_MAX,
};
enum rapl_domain_reg_id {
RAPL_DOMAIN_REG_LIMIT,
RAPL_DOMAIN_REG_STATUS,
RAPL_DOMAIN_REG_PERF,
RAPL_DOMAIN_REG_POLICY,
RAPL_DOMAIN_REG_INFO,
RAPL_DOMAIN_REG_PL4,
RAPL_DOMAIN_REG_UNIT,
RAPL_DOMAIN_REG_PL2,
RAPL_DOMAIN_REG_MAX,
};
struct rapl_domain;
enum rapl_primitives {
POWER_LIMIT1,
POWER_LIMIT2,
POWER_LIMIT4,
ENERGY_COUNTER,
FW_LOCK,
FW_HIGH_LOCK,
PL1_LOCK,
PL2_LOCK,
PL4_LOCK,
PL1_ENABLE, /* power limit 1, aka long term */
PL1_CLAMP, /* allow frequency to go below OS request */
PL2_ENABLE, /* power limit 2, aka short term, instantaneous */
PL2_CLAMP,
PL4_ENABLE, /* power limit 4, aka max peak power */
TIME_WINDOW1, /* long term */
TIME_WINDOW2, /* short term */
THERMAL_SPEC_POWER,
MAX_POWER,
MIN_POWER,
MAX_TIME_WINDOW,
THROTTLED_TIME,
PRIORITY_LEVEL,
PSYS_POWER_LIMIT1,
PSYS_POWER_LIMIT2,
PSYS_PL1_ENABLE,
PSYS_PL2_ENABLE,
PSYS_TIME_WINDOW1,
PSYS_TIME_WINDOW2,
/* below are not raw primitive data */
AVERAGE_POWER,
NR_RAPL_PRIMITIVES,
};
struct rapl_domain_data {
u64 primitives[NR_RAPL_PRIMITIVES];
unsigned long timestamp;
};
#define NR_POWER_LIMITS (POWER_LIMIT4 + 1 )
struct rapl_power_limit {
struct powercap_zone_constraint *constraint;
struct rapl_domain *domain;
const char *name;
bool locked;
u64 last_power_limit;
};
struct rapl_package;
#define RAPL_DOMAIN_NAME_LENGTH 16
union rapl_reg {
void __iomem *mmio;
u32 msr;
u64 val;
};
struct rapl_domain {
char name[RAPL_DOMAIN_NAME_LENGTH];
enum rapl_domain_type id;
union rapl_reg regs[RAPL_DOMAIN_REG_MAX];
struct powercap_zone power_zone;
struct rapl_domain_data rdd;
struct rapl_power_limit rpl[NR_POWER_LIMITS];
u64 attr_map; /* track capabilities */
unsigned int state;
unsigned int power_unit;
unsigned int energy_unit;
unsigned int time_unit;
struct rapl_package *rp;
};
struct reg_action {
union rapl_reg reg;
u64 mask;
u64 value;
int err;
};
/**
* struct rapl_if_priv : private data for different RAPL interfaces
* @ control_type : Each RAPL interface must have its own powercap
* control type .
* @ platform_rapl_domain : Optional . Some RAPL interface may have platform
* level RAPL control .
* @ pcap_rapl_online : CPU hotplug state for each RAPL interface .
* @ reg_unit : Register for getting energy / power / time unit .
* @ regs : Register sets for different RAPL Domains .
* @ limits : Number of power limits supported by each domain .
* @ read_raw : Callback for reading RAPL interface specific
* registers .
* @ write_raw : Callback for writing RAPL interface specific
* registers .
* @ defaults : internal pointer to interface default settings
* @ rpi : internal pointer to interface primitive info
*/
struct rapl_if_priv {
enum rapl_if_type type;
struct powercap_control_type *control_type;
enum cpuhp_state pcap_rapl_online;
union rapl_reg reg_unit;
union rapl_reg regs[RAPL_DOMAIN_MAX][RAPL_DOMAIN_REG_MAX];
int limits[RAPL_DOMAIN_MAX];
int (*read_raw)(int id, struct reg_action *ra);
int (*write_raw)(int id, struct reg_action *ra);
void *defaults;
void *rpi;
};
#ifdef CONFIG_PERF_EVENTS
/**
* struct rapl_package_pmu_data : Per package data for PMU support
* @ scale : Scale of 2 ^ - 32 Joules for each energy counter increase .
* @ lock : Lock to protect n_active and active_list .
* @ n_active : Number of active events .
* @ active_list : List of active events .
* @ timer_interval : Maximum timer expiration time before counter overflow .
* @ hrtimer : Periodically update the counter to prevent overflow .
*/
struct rapl_package_pmu_data {
u64 scale[RAPL_DOMAIN_MAX];
raw_spinlock_t lock;
int n_active;
struct list_head active_list;
ktime_t timer_interval;
struct hrtimer hrtimer;
};
#endif
/* maximum rapl package domain name: package-%d-die-%d */
#define PACKAGE_DOMAIN_NAME_LENGTH 30
struct rapl_package {
unsigned int id; /* logical die id, equals physical 1-die systems */
unsigned int nr_domains;
unsigned long domain_map; /* bit map of active domains */
struct rapl_domain *domains; /* array of domains, sized at runtime */
struct powercap_zone *power_zone; /* keep track of parent zone */
unsigned long power_limit_irq; /* keep track of package power limit
* notify interrupt enable status .
*/
struct list_head plist;
int lead_cpu; /* one active cpu per package for access */
/* Track active cpus */
struct cpumask cpumask;
char name[PACKAGE_DOMAIN_NAME_LENGTH];
struct rapl_if_priv *priv;
#ifdef CONFIG_PERF_EVENTS
bool has_pmu;
struct rapl_package_pmu_data pmu_data;
#endif
};
struct rapl_package *rapl_find_package_domain_cpuslocked(int id, struct rapl_if_priv *priv,
bool id_is_cpu);
struct rapl_package *rapl_add_package_cpuslocked(int id, struct rapl_if_priv *priv,
bool id_is_cpu);
void rapl_remove_package_cpuslocked(struct rapl_package *rp);
struct rapl_package *rapl_find_package_domain(int id, struct rapl_if_priv *priv, bool id_is_cpu);
struct rapl_package *rapl_add_package(int id, struct rapl_if_priv *priv, bool id_is_cpu);
void rapl_remove_package(struct rapl_package *rp);
#ifdef CONFIG_PERF_EVENTS
int rapl_package_add_pmu(struct rapl_package *rp);
void rapl_package_remove_pmu(struct rapl_package *rp);
#else
static inline int rapl_package_add_pmu(struct rapl_package *rp) { return 0 ; }
static inline void rapl_package_remove_pmu(struct rapl_package *rp) { }
#endif
#endif /* __INTEL_RAPL_H__ */
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