| /* 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 and CPPCv3 support */ |
| #define CPPC_V2_REV 2 |
| #define CPPC_V3_REV 3 |
| #define CPPC_V2_NUM_ENT 21 |
| #define CPPC_V3_NUM_ENT 23 |
| |
| #define PCC_CMD_COMPLETE_MASK (1 << 0) |
| #define PCC_ERROR_MASK (1 << 2) |
| |
| #define MAX_CPC_REG_ENT 21 |
| |
| /* CPPC specific PCC commands. */ |
| #define CMD_READ 0 |
| #define CMD_WRITE 1 |
| |
| /* 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() */ |
| 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, |
| }; |
| |
| /* |
| * 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 lowest_perf; |
| u32 lowest_nonlinear_perf; |
| u32 lowest_freq; |
| u32 nominal_freq; |
| u32 energy_perf; |
| bool auto_sel; |
| }; |
| |
| struct cppc_perf_ctrls { |
| u32 max_perf; |
| u32 min_perf; |
| u32 desired_perf; |
| u32 energy_perf; |
| }; |
| |
| struct cppc_perf_fb_ctrs { |
| u64 reference; |
| u64 delivered; |
| u64 reference_perf; |
| u64 wraparound_time; |
| }; |
| |
| /* Per CPU container for runtime CPPC management. */ |
| struct cppc_cpudata { |
| struct list_head node; |
| 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_LIB |
| extern 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_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(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 unsigned 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_get_auto_sel_caps(int cpunum, struct cppc_perf_caps *perf_caps); |
| extern int cppc_set_auto_sel(int cpu, bool enable); |
| 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_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(void) |
| { |
| return false; |
| } |
| static inline bool acpi_cpc_valid(void) |
| { |
| return false; |
| } |
| static inline bool cppc_allow_fast_switch(void) |
| { |
| return false; |
| } |
| static inline unsigned int cppc_get_transition_latency(int cpu) |
| { |
| return CPUFREQ_ETERNAL; |
| } |
| 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_auto_sel(int cpu, bool enable) |
| { |
| return -EOPNOTSUPP; |
| } |
| static inline int cppc_get_auto_sel_caps(int cpunum, struct cppc_perf_caps *perf_caps) |
| { |
| 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*/ |
