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