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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __ACPI_PROCESSOR_H #define __ACPI_PROCESSOR_H #include <linux/cpu.h> #include <linux/cpufreq.h> #include <linux/pm_qos.h> #include <linux/printk.h> #include <linux/sched.h> #include <linux/smp.h> #include <linux/thermal.h> #include <linux/types.h> #include <linux/workqueue.h> #include <asm/acpi.h> #define ACPI_PROCESSOR_CLASS "processor" #define ACPI_PROCESSOR_DEVICE_NAME "Processor" #define ACPI_PROCESSOR_DEVICE_HID "ACPI0007" #define ACPI_PROCESSOR_CONTAINER_HID "ACPI0010" #define ACPI_PROCESSOR_BUSY_METRIC 10 #define ACPI_PROCESSOR_MAX_POWER 8 #define ACPI_PROCESSOR_MAX_C2_LATENCY 100 #define ACPI_PROCESSOR_MAX_C3_LATENCY 1000 #define ACPI_PROCESSOR_MAX_THROTTLING 16 #define ACPI_PROCESSOR_MAX_THROTTLE 250 /* 25% */ #define ACPI_PROCESSOR_MAX_DUTY_WIDTH 4 #define ACPI_PDC_REVISION_ID 0x1 #define ACPI_PSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */ #define ACPI_PSD_REV0_ENTRIES 5 #define ACPI_TSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */ #define ACPI_TSD_REV0_ENTRIES 5 /* * Types of coordination defined in ACPI 3.0. Same macros can be used across * P, C and T states */ #define DOMAIN_COORD_TYPE_SW_ALL 0xfc #define DOMAIN_COORD_TYPE_SW_ANY 0xfd #define DOMAIN_COORD_TYPE_HW_ALL 0xfe #define ACPI_CSTATE_SYSTEMIO 0 #define ACPI_CSTATE_FFH 1 #define ACPI_CSTATE_HALT 2 #define ACPI_CSTATE_INTEGER 3 #define ACPI_CX_DESC_LEN 32 /* Power Management */ struct acpi_processor_cx; struct acpi_power_register { u8 descriptor; u16 length; u8 space_id; u8 bit_width; u8 bit_offset; u8 access_size; u64 address; } __packed; struct acpi_processor_cx { u8 valid; u8 type; u32 address; u8 entry_method; u8 index; u32 latency; u8 bm_sts_skip; char desc[ACPI_CX_DESC_LEN]; }; struct acpi_lpi_state { u32 min_residency; u32 wake_latency; /* worst case */ u32 flags; u32 arch_flags; u32 res_cnt_freq; u32 enable_parent_state; u64 address; u8 index; u8 entry_method; char desc[ACPI_CX_DESC_LEN]; }; struct acpi_processor_power { int count; union { struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER]; struct acpi_lpi_state lpi_states[ACPI_PROCESSOR_MAX_POWER]; }; int timer_broadcast_on_state; }; /* Performance Management */ struct acpi_psd_package { u64 num_entries; u64 revision; u64 domain; u64 coord_type; u64 num_processors; } __packed; struct acpi_pct_register { u8 descriptor; u16 length; u8 space_id; u8 bit_width; u8 bit_offset; u8 reserved; u64 address; } __packed; struct acpi_processor_px { u64 core_frequency; /* megahertz */ u64 power; /* milliWatts */ u64 transition_latency; /* microseconds */ u64 bus_master_latency; /* microseconds */ u64 control; /* control value */ u64 status; /* success indicator */ }; struct acpi_processor_performance { unsigned int state; unsigned int platform_limit; struct acpi_pct_register control_register; struct acpi_pct_register status_register; unsigned int state_count; struct acpi_processor_px *states; struct acpi_psd_package domain_info; cpumask_var_t shared_cpu_map; unsigned int shared_type; }; /* Throttling Control */ struct acpi_tsd_package { u64 num_entries; u64 revision; u64 domain; u64 coord_type; u64 num_processors; } __packed; struct acpi_ptc_register { u8 descriptor; u16 length; u8 space_id; u8 bit_width; u8 bit_offset; u8 reserved; u64 address; } __packed; struct acpi_processor_tx_tss { u64 freqpercentage; /* */ u64 power; /* milliWatts */ u64 transition_latency; /* microseconds */ u64 control; /* control value */ u64 status; /* success indicator */ }; struct acpi_processor_tx { u16 power; u16 performance; }; struct acpi_processor; struct acpi_processor_throttling { unsigned int state; unsigned int platform_limit; struct acpi_pct_register control_register; struct acpi_pct_register status_register; unsigned int state_count; struct acpi_processor_tx_tss *states_tss; struct acpi_tsd_package domain_info; cpumask_var_t shared_cpu_map; int (*acpi_processor_get_throttling) (struct acpi_processor * pr); int (*acpi_processor_set_throttling) (struct acpi_processor * pr, int state, bool force); u32 address; u8 duty_offset; u8 duty_width; u8 tsd_valid_flag; unsigned int shared_type; struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING]; }; /* Limit Interface */ struct acpi_processor_lx { int px; /* performance state */ int tx; /* throttle level */ }; struct acpi_processor_limit { struct acpi_processor_lx state; /* current limit */ struct acpi_processor_lx thermal; /* thermal limit */ struct acpi_processor_lx user; /* user limit */ }; struct acpi_processor_flags { u8 power:1; u8 performance:1; u8 throttling:1; u8 limit:1; u8 bm_control:1; u8 bm_check:1; u8 has_cst:1; u8 has_lpi:1; u8 power_setup_done:1; u8 bm_rld_set:1; u8 previously_online:1; }; struct acpi_processor { acpi_handle handle; u32 acpi_id; phys_cpuid_t phys_id; /* CPU hardware ID such as APIC ID for x86 */ u32 id; /* CPU logical ID allocated by OS */ u32 pblk; int performance_platform_limit; int throttling_platform_limit; /* 0 - states 0..n-th state available */ struct acpi_processor_flags flags; struct acpi_processor_power power; struct acpi_processor_performance *performance; struct acpi_processor_throttling throttling; struct acpi_processor_limit limit; struct thermal_cooling_device *cdev; struct device *dev; /* Processor device. */ struct freq_qos_request perflib_req; struct freq_qos_request thermal_req; }; struct acpi_processor_errata { u8 smp; struct { u8 throttle:1; u8 fdma:1; u8 reserved:6; u32 bmisx; } piix4; }; extern int acpi_processor_preregister_performance(struct acpi_processor_performance __percpu *performance); extern int acpi_processor_register_performance(struct acpi_processor_performance *performance, unsigned int cpu); extern void acpi_processor_unregister_performance(unsigned int cpu); int acpi_processor_pstate_control(void); /* note: this locks both the calling module and the processor module if a _PPC object exists, rmmod is disallowed then */ int acpi_processor_notify_smm(struct module *calling_module); int acpi_processor_get_psd(acpi_handle handle, struct acpi_psd_package *pdomain); /* parsing the _P* objects. */ extern int acpi_processor_get_performance_info(struct acpi_processor *pr); /* for communication between multiple parts of the processor kernel module */ DECLARE_PER_CPU(struct acpi_processor *, processors); extern struct acpi_processor_errata errata; #if defined(ARCH_HAS_POWER_INIT) && defined(CONFIG_ACPI_PROCESSOR_CSTATE) void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags, unsigned int cpu); int acpi_processor_ffh_cstate_probe(unsigned int cpu, struct acpi_processor_cx *cx, struct acpi_power_register *reg); void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate); #else static inline void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags, unsigned int cpu) { flags->bm_check = 1; return; } static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu, struct acpi_processor_cx *cx, struct acpi_power_register *reg) { return -1; } static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate) { return; } #endif static inline int call_on_cpu(int cpu, long (*fn)(void *), void *arg, bool direct) { if (direct || (is_percpu_thread() && cpu == smp_processor_id())) return fn(arg); return work_on_cpu(cpu, fn, arg); } /* in processor_perflib.c */ #ifdef CONFIG_CPU_FREQ extern bool acpi_processor_cpufreq_init; void acpi_processor_ignore_ppc_init(void); void acpi_processor_ppc_init(struct cpufreq_policy *policy); void acpi_processor_ppc_exit(struct cpufreq_policy *policy); void acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag); extern int acpi_processor_get_bios_limit(int cpu, unsigned int *limit); #else static inline void acpi_processor_ignore_ppc_init(void) { return; } static inline void acpi_processor_ppc_init(struct cpufreq_policy *policy) { return; } static inline void acpi_processor_ppc_exit(struct cpufreq_policy *policy) { return; } static inline void acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag) { static unsigned int printout = 1; if (printout) { printk(KERN_WARNING "Warning: Processor Platform Limit event detected, but not handled.\n"); printk(KERN_WARNING "Consider compiling CPUfreq support into your kernel.\n"); printout = 0; } } static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit) { return -ENODEV; } #endif /* CONFIG_CPU_FREQ */ /* in processor_core.c */ phys_cpuid_t acpi_get_phys_id(acpi_handle, int type, u32 acpi_id); phys_cpuid_t acpi_map_madt_entry(u32 acpi_id); int acpi_map_cpuid(phys_cpuid_t phys_id, u32 acpi_id); int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id); #ifdef CONFIG_ACPI_CPPC_LIB extern int acpi_cppc_processor_probe(struct acpi_processor *pr); extern void acpi_cppc_processor_exit(struct acpi_processor *pr); #else static inline int acpi_cppc_processor_probe(struct acpi_processor *pr) { return 0; } static inline void acpi_cppc_processor_exit(struct acpi_processor *pr) { return; } #endif /* CONFIG_ACPI_CPPC_LIB */ /* in processor_pdc.c */ void acpi_processor_set_pdc(acpi_handle handle); /* in processor_throttling.c */ #ifdef CONFIG_ACPI_CPU_FREQ_PSS int acpi_processor_tstate_has_changed(struct acpi_processor *pr); int acpi_processor_get_throttling_info(struct acpi_processor *pr); extern int acpi_processor_set_throttling(struct acpi_processor *pr, int state, bool force); /* * Reevaluate whether the T-state is invalid after one cpu is * onlined/offlined. In such case the flags.throttling will be updated. */ extern void acpi_processor_reevaluate_tstate(struct acpi_processor *pr, bool is_dead); extern const struct file_operations acpi_processor_throttling_fops; extern void acpi_processor_throttling_init(void); #else static inline int acpi_processor_tstate_has_changed(struct acpi_processor *pr) { return 0; } static inline int acpi_processor_get_throttling_info(struct acpi_processor *pr) { return -ENODEV; } static inline int acpi_processor_set_throttling(struct acpi_processor *pr, int state, bool force) { return -ENODEV; } static inline void acpi_processor_reevaluate_tstate(struct acpi_processor *pr, bool is_dead) {} static inline void acpi_processor_throttling_init(void) {} #endif /* CONFIG_ACPI_CPU_FREQ_PSS */ /* in processor_idle.c */ extern struct cpuidle_driver acpi_idle_driver; #ifdef CONFIG_ACPI_PROCESSOR_IDLE int acpi_processor_power_init(struct acpi_processor *pr); int acpi_processor_power_exit(struct acpi_processor *pr); int acpi_processor_power_state_has_changed(struct acpi_processor *pr); int acpi_processor_hotplug(struct acpi_processor *pr); #else static inline int acpi_processor_power_init(struct acpi_processor *pr) { return -ENODEV; } static inline int acpi_processor_power_exit(struct acpi_processor *pr) { return -ENODEV; } static inline int acpi_processor_power_state_has_changed(struct acpi_processor *pr) { return -ENODEV; } static inline int acpi_processor_hotplug(struct acpi_processor *pr) { return -ENODEV; } #endif /* CONFIG_ACPI_PROCESSOR_IDLE */ /* in processor_thermal.c */ int acpi_processor_thermal_init(struct acpi_processor *pr, struct acpi_device *device); void acpi_processor_thermal_exit(struct acpi_processor *pr, struct acpi_device *device); extern const struct thermal_cooling_device_ops processor_cooling_ops; #ifdef CONFIG_CPU_FREQ void acpi_thermal_cpufreq_init(struct cpufreq_policy *policy); void acpi_thermal_cpufreq_exit(struct cpufreq_policy *policy); #else static inline void acpi_thermal_cpufreq_init(struct cpufreq_policy *policy) { return; } static inline void acpi_thermal_cpufreq_exit(struct cpufreq_policy *policy) { return; } #endif /* CONFIG_CPU_FREQ */ #ifdef CONFIG_ACPI_PROCESSOR_IDLE extern int acpi_processor_ffh_lpi_probe(unsigned int cpu); extern int acpi_processor_ffh_lpi_enter(struct acpi_lpi_state *lpi); #endif void acpi_processor_init_invariance_cppc(void); #endif