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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308/* SPDX-License-Identifier: GPL-2.0-only *//* * CPPC (Collaborative Processor Performance Control) methods used * by CPUfreq drivers. * * (C) Copyright 2014, 2015 Linaro Ltd. * Author: Ashwin Chaugule <ashwin.chaugule@linaro.org> */
#ifndef _CPPC_ACPI_H#define _CPPC_ACPI_H
#include <linux/acpi.h>#include <linux/cpufreq.h>#include <linux/types.h>
#include <acpi/pcc.h>#include <acpi/processor.h>
/* CPPCv2, CPPCv3 and CPPCv4 support */#define CPPC_V2_REV 2#define CPPC_V3_REV 3#define CPPC_V4_REV 4#define CPPC_V2_NUM_ENT 21#define CPPC_V3_NUM_ENT 23#define CPPC_V4_NUM_ENT 25
#define PCC_CMD_COMPLETE_MASK (1 << 0)#define PCC_ERROR_MASK (1 << 2)
#define MAX_CPC_REG_ENT 23
/* CPPC specific PCC commands. */#define CMD_READ 0#define CMD_WRITE 1
#define CPPC_AUTO_ACT_WINDOW_SIG_BIT_SIZE (7)#define CPPC_AUTO_ACT_WINDOW_EXP_BIT_SIZE (3)#define CPPC_AUTO_ACT_WINDOW_MAX_SIG ((1 << CPPC_AUTO_ACT_WINDOW_SIG_BIT_SIZE) - 1)#define CPPC_AUTO_ACT_WINDOW_MAX_EXP ((1 << CPPC_AUTO_ACT_WINDOW_EXP_BIT_SIZE) - 1)/* CPPC_AUTO_ACT_WINDOW_MAX_SIG is 127, so 128 and 129 will decay to 127 when writing */#define CPPC_AUTO_ACT_WINDOW_SIG_CARRY_THRESH 129
#define CPPC_EPP_PERFORMANCE_PREF 0x00#define CPPC_EPP_ENERGY_EFFICIENCY_PREF 0xFF
#define CPPC_PERF_LIMITED_DESIRED_EXCURSION BIT(0)#define CPPC_PERF_LIMITED_MINIMUM_EXCURSION BIT(1)#define CPPC_PERF_LIMITED_MASK (CPPC_PERF_LIMITED_DESIRED_EXCURSION | \ CPPC_PERF_LIMITED_MINIMUM_EXCURSION)
/* Each register has the folowing format. */struct cpc_reg { u8 descriptor; u16 length; u8 space_id; u8 bit_width; u8 bit_offset; u8 access_width; u64 address;} __packed;
/* * Each entry in the CPC table is either * of type ACPI_TYPE_BUFFER or * ACPI_TYPE_INTEGER. */struct cpc_register_resource { acpi_object_type type; u64 __iomem *sys_mem_vaddr; union { struct cpc_reg reg; u64 int_value; } cpc_entry;};
/* Container to hold the CPC details for each CPU */struct cpc_desc { int num_entries; int version; int cpu_id; int write_cmd_status; int write_cmd_id; /* Lock used for RMW operations in cpc_write() */ raw_spinlock_t rmw_lock; struct cpc_register_resource cpc_regs[MAX_CPC_REG_ENT]; struct acpi_psd_package domain_info; struct kobject kobj;};
/* These are indexes into the per-cpu cpc_regs[]. Order is important. */enum cppc_regs { HIGHEST_PERF, NOMINAL_PERF, LOW_NON_LINEAR_PERF, LOWEST_PERF, GUARANTEED_PERF, DESIRED_PERF, MIN_PERF, MAX_PERF, PERF_REDUC_TOLERANCE, TIME_WINDOW, CTR_WRAP_TIME, REFERENCE_CTR, DELIVERED_CTR, PERF_LIMITED, ENABLE, AUTO_SEL_ENABLE, AUTO_ACT_WINDOW, ENERGY_PERF, REFERENCE_PERF, LOWEST_FREQ, NOMINAL_FREQ, OSPM_NOMINAL_PERF, RESOURCE_PRIORITY,};
/* * Categorization of registers as described * in the ACPI v.5.1 spec. * XXX: Only filling up ones which are used by governors * today. */struct cppc_perf_caps { u32 guaranteed_perf; u32 highest_perf; u32 nominal_perf; u32 reference_perf; u32 lowest_perf; u32 lowest_nonlinear_perf; u32 lowest_freq; u32 nominal_freq;};
struct cppc_perf_ctrls { u32 max_perf; u32 min_perf; u32 desired_perf; u32 energy_perf; bool auto_sel;};
struct cppc_perf_fb_ctrs { u64 reference; u64 delivered; u64 wraparound_time;};
/* Per CPU container for runtime CPPC management. */struct cppc_cpudata { struct cppc_perf_caps perf_caps; struct cppc_perf_ctrls perf_ctrls; struct cppc_perf_fb_ctrs perf_fb_ctrs; unsigned int shared_type; cpumask_var_t shared_cpu_map;};
#ifdef CONFIG_ACPI_CPPC_LIBextern int cppc_get_desired_perf(int cpunum, u64 *desired_perf);extern int cppc_get_nominal_perf(int cpunum, u64 *nominal_perf);extern int cppc_get_highest_perf(int cpunum, u64 *highest_perf);extern int cppc_get_perf_ctrs(int cpu, struct cppc_perf_fb_ctrs *perf_fb_ctrs);extern int cppc_get_perf(int cpu, struct cppc_perf_ctrls *perf_ctrls);extern int cppc_set_perf(int cpu, struct cppc_perf_ctrls *perf_ctrls);extern int cppc_set_enable(int cpu, bool enable);extern int cppc_get_perf_caps(int cpu, struct cppc_perf_caps *caps);extern bool cppc_perf_ctrs_in_pcc_cpu(unsigned int cpu);extern bool cppc_perf_ctrs_in_pcc(void);extern u64 cppc_get_dmi_max_khz(void);extern unsigned int cppc_perf_to_khz(struct cppc_perf_caps *caps, unsigned int perf);extern unsigned int cppc_khz_to_perf(struct cppc_perf_caps *caps, unsigned int freq);extern bool acpi_cpc_valid(void);extern bool cppc_allow_fast_switch(void);extern int acpi_get_psd_map(unsigned int cpu, struct cppc_cpudata *cpu_data);extern int cppc_get_transition_latency(int cpu);extern bool cpc_ffh_supported(void);extern bool cpc_supported_by_cpu(void);extern int cpc_read_ffh(int cpunum, struct cpc_reg *reg, u64 *val);extern int cpc_write_ffh(int cpunum, struct cpc_reg *reg, u64 val);extern int cppc_get_epp_perf(int cpunum, u64 *epp_perf);extern int cppc_set_epp_perf(int cpu, struct cppc_perf_ctrls *perf_ctrls, bool enable);extern int cppc_set_epp(int cpu, u64 epp_val);extern int cppc_get_auto_act_window(int cpu, u64 *auto_act_window);extern int cppc_set_auto_act_window(int cpu, u64 auto_act_window);extern int cppc_get_auto_sel(int cpu, bool *enable);extern int cppc_set_auto_sel(int cpu, bool enable);extern int cppc_get_perf_limited(int cpu, u64 *perf_limited);extern int cppc_set_perf_limited(int cpu, u64 bits_to_clear);extern int amd_get_highest_perf(unsigned int cpu, u32 *highest_perf);extern int amd_get_boost_ratio_numerator(unsigned int cpu, u64 *numerator);extern int amd_detect_prefcore(bool *detected);#else /* !CONFIG_ACPI_CPPC_LIB */static inline int cppc_get_desired_perf(int cpunum, u64 *desired_perf){ return -EOPNOTSUPP;}static inline int cppc_get_nominal_perf(int cpunum, u64 *nominal_perf){ return -EOPNOTSUPP;}static inline int cppc_get_highest_perf(int cpunum, u64 *highest_perf){ return -EOPNOTSUPP;}static inline int cppc_get_perf_ctrs(int cpu, struct cppc_perf_fb_ctrs *perf_fb_ctrs){ return -EOPNOTSUPP;}static inline int cppc_get_perf(int cpu, struct cppc_perf_ctrls *perf_ctrls){ return -EOPNOTSUPP;}static inline int cppc_set_perf(int cpu, struct cppc_perf_ctrls *perf_ctrls){ return -EOPNOTSUPP;}static inline int cppc_set_enable(int cpu, bool enable){ return -EOPNOTSUPP;}static inline int cppc_get_perf_caps(int cpu, struct cppc_perf_caps *caps){ return -EOPNOTSUPP;}static inline bool cppc_perf_ctrs_in_pcc_cpu(unsigned int cpu){ return false;}static inline bool cppc_perf_ctrs_in_pcc(void){ return false;}static inline bool acpi_cpc_valid(void){ return false;}static inline bool cppc_allow_fast_switch(void){ return false;}static inline int cppc_get_transition_latency(int cpu){ return -ENODATA;}static inline bool cpc_ffh_supported(void){ return false;}static inline int cpc_read_ffh(int cpunum, struct cpc_reg *reg, u64 *val){ return -EOPNOTSUPP;}static inline int cpc_write_ffh(int cpunum, struct cpc_reg *reg, u64 val){ return -EOPNOTSUPP;}static inline int cppc_set_epp_perf(int cpu, struct cppc_perf_ctrls *perf_ctrls, bool enable){ return -EOPNOTSUPP;}static inline int cppc_get_epp_perf(int cpunum, u64 *epp_perf){ return -EOPNOTSUPP;}static inline int cppc_set_epp(int cpu, u64 epp_val){ return -EOPNOTSUPP;}static inline int cppc_get_auto_act_window(int cpu, u64 *auto_act_window){ return -EOPNOTSUPP;}static inline int cppc_set_auto_act_window(int cpu, u64 auto_act_window){ return -EOPNOTSUPP;}static inline int cppc_get_auto_sel(int cpu, bool *enable){ return -EOPNOTSUPP;}static inline int cppc_set_auto_sel(int cpu, bool enable){ return -EOPNOTSUPP;}static inline int cppc_get_perf_limited(int cpu, u64 *perf_limited){ return -EOPNOTSUPP;}static inline int cppc_set_perf_limited(int cpu, u64 bits_to_clear){ return -EOPNOTSUPP;}static inline int amd_get_highest_perf(unsigned int cpu, u32 *highest_perf){ return -ENODEV;}static inline int amd_get_boost_ratio_numerator(unsigned int cpu, u64 *numerator){ return -EOPNOTSUPP;}static inline int amd_detect_prefcore(bool *detected){ return -ENODEV;}#endif /* !CONFIG_ACPI_CPPC_LIB */
#endif /* _CPPC_ACPI_H*/