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提交 2dee4b0e 编写于 作者: R Rafael J. Wysocki
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Merge intel_pstate driver updates for v4.12.

上级 939dc6f5 630e5757
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drivers/cpufreq/intel_pstate.c
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......@@ -37,6 +37,9 @@
#include <asm/cpufeature.h>
#include <asm/intel-family.h>
#define INTEL_PSTATE_DEFAULT_SAMPLING_INTERVAL (10 * NSEC_PER_MSEC)
#define INTEL_PSTATE_HWP_SAMPLING_INTERVAL (50 * NSEC_PER_MSEC)
#define INTEL_CPUFREQ_TRANSITION_LATENCY 20000
#ifdef CONFIG_ACPI
......@@ -74,6 +77,11 @@ static inline int ceiling_fp(int32_t x)
return ret;
}
static inline int32_t percent_fp(int percent)
{
return div_fp(percent, 100);
}
static inline u64 mul_ext_fp(u64 x, u64 y)
{
return (x * y) >> EXT_FRAC_BITS;
......@@ -186,45 +194,22 @@ struct _pid {
};
/**
* struct perf_limits - Store user and policy limits
* @no_turbo: User requested turbo state from intel_pstate sysfs
* @turbo_disabled: Platform turbo status either from msr
* MSR_IA32_MISC_ENABLE or when maximum available pstate
* matches the maximum turbo pstate
* @max_perf_pct: Effective maximum performance limit in percentage, this
* is minimum of either limits enforced by cpufreq policy
* or limits from user set limits via intel_pstate sysfs
* @min_perf_pct: Effective minimum performance limit in percentage, this
* is maximum of either limits enforced by cpufreq policy
* or limits from user set limits via intel_pstate sysfs
* @max_perf: This is a scaled value between 0 to 255 for max_perf_pct
* This value is used to limit max pstate
* @min_perf: This is a scaled value between 0 to 255 for min_perf_pct
* This value is used to limit min pstate
* @max_policy_pct: The maximum performance in percentage enforced by
* cpufreq setpolicy interface
* @max_sysfs_pct: The maximum performance in percentage enforced by
* intel pstate sysfs interface, unused when per cpu
* controls are enforced
* @min_policy_pct: The minimum performance in percentage enforced by
* cpufreq setpolicy interface
* @min_sysfs_pct: The minimum performance in percentage enforced by
* intel pstate sysfs interface, unused when per cpu
* controls are enforced
*
* Storage for user and policy defined limits.
* struct global_params - Global parameters, mostly tunable via sysfs.
* @no_turbo: Whether or not to use turbo P-states.
* @turbo_disabled: Whethet or not turbo P-states are available at all,
* based on the MSR_IA32_MISC_ENABLE value and whether or
* not the maximum reported turbo P-state is different from
* the maximum reported non-turbo one.
* @min_perf_pct: Minimum capacity limit in percent of the maximum turbo
* P-state capacity.
* @max_perf_pct: Maximum capacity limit in percent of the maximum turbo
* P-state capacity.
*/
struct perf_limits {
int no_turbo;
int turbo_disabled;
struct global_params {
bool no_turbo;
bool turbo_disabled;
int max_perf_pct;
int min_perf_pct;
int32_t max_perf;
int32_t min_perf;
int max_policy_pct;
int max_sysfs_pct;
int min_policy_pct;
int min_sysfs_pct;
};
/**
......@@ -245,9 +230,10 @@ struct perf_limits {
* @prev_cummulative_iowait: IO Wait time difference from last and
* current sample
* @sample: Storage for storing last Sample data
* @perf_limits: Pointer to perf_limit unique to this CPU
* Not all field in the structure are applicable
* when per cpu controls are enforced
* @min_perf: Minimum capacity limit as a fraction of the maximum
* turbo P-state capacity.
* @max_perf: Maximum capacity limit as a fraction of the maximum
* turbo P-state capacity.
* @acpi_perf_data: Stores ACPI perf information read from _PSS
* @valid_pss_table: Set to true for valid ACPI _PSS entries found
* @epp_powersave: Last saved HWP energy performance preference
......@@ -279,7 +265,8 @@ struct cpudata {
u64 prev_tsc;
u64 prev_cummulative_iowait;
struct sample sample;
struct perf_limits *perf_limits;
int32_t min_perf;
int32_t max_perf;
#ifdef CONFIG_ACPI
struct acpi_processor_performance acpi_perf_data;
bool valid_pss_table;
......@@ -324,7 +311,7 @@ struct pstate_adjust_policy {
* @get_scaling: Callback to get frequency scaling factor
* @get_val: Callback to convert P state to actual MSR write value
* @get_vid: Callback to get VID data for Atom platforms
* @get_target_pstate: Callback to a function to calculate next P state to use
* @update_util: Active mode utilization update callback.
*
* Core and Atom CPU models have different way to get P State limits. This
* structure is used to store those callbacks.
......@@ -337,43 +324,31 @@ struct pstate_funcs {
int (*get_scaling)(void);
u64 (*get_val)(struct cpudata*, int pstate);
void (*get_vid)(struct cpudata *);
int32_t (*get_target_pstate)(struct cpudata *);
void (*update_util)(struct update_util_data *data, u64 time,
unsigned int flags);
};
/**
* struct cpu_defaults- Per CPU model default config data
* @pid_policy: PID config data
* @funcs: Callback function data
*/
struct cpu_defaults {
struct pstate_adjust_policy pid_policy;
struct pstate_funcs funcs;
static struct pstate_funcs pstate_funcs __read_mostly;
static struct pstate_adjust_policy pid_params __read_mostly = {
.sample_rate_ms = 10,
.sample_rate_ns = 10 * NSEC_PER_MSEC,
.deadband = 0,
.setpoint = 97,
.p_gain_pct = 20,
.d_gain_pct = 0,
.i_gain_pct = 0,
};
static inline int32_t get_target_pstate_use_performance(struct cpudata *cpu);
static inline int32_t get_target_pstate_use_cpu_load(struct cpudata *cpu);
static struct pstate_adjust_policy pid_params __read_mostly;
static struct pstate_funcs pstate_funcs __read_mostly;
static int hwp_active __read_mostly;
static bool per_cpu_limits __read_mostly;
static bool driver_registered __read_mostly;
static struct cpufreq_driver *intel_pstate_driver __read_mostly;
#ifdef CONFIG_ACPI
static bool acpi_ppc;
#endif
static struct perf_limits global;
static void intel_pstate_init_limits(struct perf_limits *limits)
{
memset(limits, 0, sizeof(*limits));
limits->max_perf_pct = 100;
limits->max_perf = int_ext_tofp(1);
limits->max_policy_pct = 100;
limits->max_sysfs_pct = 100;
}
static struct global_params global;
static DEFINE_MUTEX(intel_pstate_driver_lock);
static DEFINE_MUTEX(intel_pstate_limits_lock);
......@@ -530,29 +505,6 @@ static inline void intel_pstate_exit_perf_limits(struct cpufreq_policy *policy)
}
#endif
static inline void pid_reset(struct _pid *pid, int setpoint, int busy,
int deadband, int integral) {
pid->setpoint = int_tofp(setpoint);
pid->deadband = int_tofp(deadband);
pid->integral = int_tofp(integral);
pid->last_err = int_tofp(setpoint) - int_tofp(busy);
}
static inline void pid_p_gain_set(struct _pid *pid, int percent)
{
pid->p_gain = div_fp(percent, 100);
}
static inline void pid_i_gain_set(struct _pid *pid, int percent)
{
pid->i_gain = div_fp(percent, 100);
}
static inline void pid_d_gain_set(struct _pid *pid, int percent)
{
pid->d_gain = div_fp(percent, 100);
}
static signed int pid_calc(struct _pid *pid, int32_t busy)
{
signed int result;
......@@ -590,23 +542,17 @@ static signed int pid_calc(struct _pid *pid, int32_t busy)
return (signed int)fp_toint(result);
}
static inline void intel_pstate_busy_pid_reset(struct cpudata *cpu)
static inline void intel_pstate_pid_reset(struct cpudata *cpu)
{
pid_p_gain_set(&cpu->pid, pid_params.p_gain_pct);
pid_d_gain_set(&cpu->pid, pid_params.d_gain_pct);
pid_i_gain_set(&cpu->pid, pid_params.i_gain_pct);
struct _pid *pid = &cpu->pid;
pid_reset(&cpu->pid, pid_params.setpoint, 100, pid_params.deadband, 0);
}
static inline void intel_pstate_reset_all_pid(void)
{
unsigned int cpu;
for_each_online_cpu(cpu) {
if (all_cpu_data[cpu])
intel_pstate_busy_pid_reset(all_cpu_data[cpu]);
}
pid->p_gain = percent_fp(pid_params.p_gain_pct);
pid->d_gain = percent_fp(pid_params.d_gain_pct);
pid->i_gain = percent_fp(pid_params.i_gain_pct);
pid->setpoint = int_tofp(pid_params.setpoint);
pid->last_err = pid->setpoint - int_tofp(100);
pid->deadband = int_tofp(pid_params.deadband);
pid->integral = 0;
}
static inline void update_turbo_state(void)
......@@ -621,6 +567,14 @@ static inline void update_turbo_state(void)
cpu->pstate.max_pstate == cpu->pstate.turbo_pstate);
}
static int min_perf_pct_min(void)
{
struct cpudata *cpu = all_cpu_data[0];
return DIV_ROUND_UP(cpu->pstate.min_pstate * 100,
cpu->pstate.turbo_pstate);
}
static s16 intel_pstate_get_epb(struct cpudata *cpu_data)
{
u64 epb;
......@@ -838,19 +792,13 @@ static struct freq_attr *hwp_cpufreq_attrs[] = {
NULL,
};
static void intel_pstate_hwp_set(struct cpufreq_policy *policy)
static void intel_pstate_hwp_set(unsigned int cpu)
{
int min, hw_min, max, hw_max, cpu;
struct perf_limits *perf_limits = &global;
u64 value, cap;
for_each_cpu(cpu, policy->cpus) {
struct cpudata *cpu_data = all_cpu_data[cpu];
int min, hw_min, max, hw_max;
u64 value, cap;
s16 epp;
if (per_cpu_limits)
perf_limits = all_cpu_data[cpu]->perf_limits;
rdmsrl_on_cpu(cpu, MSR_HWP_CAPABILITIES, &cap);
hw_min = HWP_LOWEST_PERF(cap);
if (global.no_turbo)
......@@ -858,11 +806,11 @@ static void intel_pstate_hwp_set(struct cpufreq_policy *policy)
else
hw_max = HWP_HIGHEST_PERF(cap);
max = fp_ext_toint(hw_max * perf_limits->max_perf);
max = fp_ext_toint(hw_max * cpu_data->max_perf);
if (cpu_data->policy == CPUFREQ_POLICY_PERFORMANCE)
min = max;
else
min = fp_ext_toint(hw_max * perf_limits->min_perf);
min = fp_ext_toint(hw_max * cpu_data->min_perf);
rdmsrl_on_cpu(cpu, MSR_HWP_REQUEST, &value);
......@@ -890,7 +838,6 @@ static void intel_pstate_hwp_set(struct cpufreq_policy *policy)
if (epp < 0)
goto skip_epp;
epp = 0;
} else {
/* skip setting EPP, when saved value is invalid */
......@@ -919,15 +866,6 @@ static void intel_pstate_hwp_set(struct cpufreq_policy *policy)
}
skip_epp:
wrmsrl_on_cpu(cpu, MSR_HWP_REQUEST, value);
}
}
static int intel_pstate_hwp_set_policy(struct cpufreq_policy *policy)
{
if (hwp_active)
intel_pstate_hwp_set(policy);
return 0;
}
static int intel_pstate_hwp_save_state(struct cpufreq_policy *policy)
......@@ -944,20 +882,17 @@ static int intel_pstate_hwp_save_state(struct cpufreq_policy *policy)
static int intel_pstate_resume(struct cpufreq_policy *policy)
{
int ret;
if (!hwp_active)
return 0;
mutex_lock(&intel_pstate_limits_lock);
all_cpu_data[policy->cpu]->epp_policy = 0;
ret = intel_pstate_hwp_set_policy(policy);
intel_pstate_hwp_set(policy->cpu);
mutex_unlock(&intel_pstate_limits_lock);
return ret;
return 0;
}
static void intel_pstate_update_policies(void)
......@@ -971,9 +906,14 @@ static void intel_pstate_update_policies(void)
/************************** debugfs begin ************************/
static int pid_param_set(void *data, u64 val)
{
unsigned int cpu;
*(u32 *)data = val;
pid_params.sample_rate_ns = pid_params.sample_rate_ms * NSEC_PER_MSEC;
intel_pstate_reset_all_pid();
for_each_possible_cpu(cpu)
if (all_cpu_data[cpu])
intel_pstate_pid_reset(all_cpu_data[cpu]);
return 0;
}
......@@ -1084,7 +1024,7 @@ static ssize_t show_turbo_pct(struct kobject *kobj,
mutex_lock(&intel_pstate_driver_lock);
if (!driver_registered) {
if (!intel_pstate_driver) {
mutex_unlock(&intel_pstate_driver_lock);
return -EAGAIN;
}
......@@ -1109,7 +1049,7 @@ static ssize_t show_num_pstates(struct kobject *kobj,
mutex_lock(&intel_pstate_driver_lock);
if (!driver_registered) {
if (!intel_pstate_driver) {
mutex_unlock(&intel_pstate_driver_lock);
return -EAGAIN;
}
......@@ -1129,7 +1069,7 @@ static ssize_t show_no_turbo(struct kobject *kobj,
mutex_lock(&intel_pstate_driver_lock);
if (!driver_registered) {
if (!intel_pstate_driver) {
mutex_unlock(&intel_pstate_driver_lock);
return -EAGAIN;
}
......@@ -1157,7 +1097,7 @@ static ssize_t store_no_turbo(struct kobject *a, struct attribute *b,
mutex_lock(&intel_pstate_driver_lock);
if (!driver_registered) {
if (!intel_pstate_driver) {
mutex_unlock(&intel_pstate_driver_lock);
return -EAGAIN;
}
......@@ -1174,6 +1114,15 @@ static ssize_t store_no_turbo(struct kobject *a, struct attribute *b,
global.no_turbo = clamp_t(int, input, 0, 1);
if (global.no_turbo) {
struct cpudata *cpu = all_cpu_data[0];
int pct = cpu->pstate.max_pstate * 100 / cpu->pstate.turbo_pstate;
/* Squash the global minimum into the permitted range. */
if (global.min_perf_pct > pct)
global.min_perf_pct = pct;
}
mutex_unlock(&intel_pstate_limits_lock);
intel_pstate_update_policies();
......@@ -1195,18 +1144,14 @@ static ssize_t store_max_perf_pct(struct kobject *a, struct attribute *b,
mutex_lock(&intel_pstate_driver_lock);
if (!driver_registered) {
if (!intel_pstate_driver) {
mutex_unlock(&intel_pstate_driver_lock);
return -EAGAIN;
}
mutex_lock(&intel_pstate_limits_lock);
global.max_sysfs_pct = clamp_t(int, input, 0 , 100);
global.max_perf_pct = min(global.max_policy_pct, global.max_sysfs_pct);
global.max_perf_pct = max(global.min_policy_pct, global.max_perf_pct);
global.max_perf_pct = max(global.min_perf_pct, global.max_perf_pct);
global.max_perf = percent_ext_fp(global.max_perf_pct);
global.max_perf_pct = clamp_t(int, input, global.min_perf_pct, 100);
mutex_unlock(&intel_pstate_limits_lock);
......@@ -1229,18 +1174,15 @@ static ssize_t store_min_perf_pct(struct kobject *a, struct attribute *b,
mutex_lock(&intel_pstate_driver_lock);
if (!driver_registered) {
if (!intel_pstate_driver) {
mutex_unlock(&intel_pstate_driver_lock);
return -EAGAIN;
}
mutex_lock(&intel_pstate_limits_lock);
global.min_sysfs_pct = clamp_t(int, input, 0 , 100);
global.min_perf_pct = max(global.min_policy_pct, global.min_sysfs_pct);
global.min_perf_pct = min(global.max_policy_pct, global.min_perf_pct);
global.min_perf_pct = min(global.max_perf_pct, global.min_perf_pct);
global.min_perf = percent_ext_fp(global.min_perf_pct);
global.min_perf_pct = clamp_t(int, input,
min_perf_pct_min(), global.max_perf_pct);
mutex_unlock(&intel_pstate_limits_lock);
......@@ -1554,132 +1496,10 @@ static int knl_get_turbo_pstate(void)
return ret;
}
static struct cpu_defaults core_params = {
.pid_policy = {
.sample_rate_ms = 10,
.deadband = 0,
.setpoint = 97,
.p_gain_pct = 20,
.d_gain_pct = 0,
.i_gain_pct = 0,
},
.funcs = {
.get_max = core_get_max_pstate,
.get_max_physical = core_get_max_pstate_physical,
.get_min = core_get_min_pstate,
.get_turbo = core_get_turbo_pstate,
.get_scaling = core_get_scaling,
.get_val = core_get_val,
.get_target_pstate = get_target_pstate_use_performance,
},
};
static const struct cpu_defaults silvermont_params = {
.pid_policy = {
.sample_rate_ms = 10,
.deadband = 0,
.setpoint = 60,
.p_gain_pct = 14,
.d_gain_pct = 0,
.i_gain_pct = 4,
},
.funcs = {
.get_max = atom_get_max_pstate,
.get_max_physical = atom_get_max_pstate,
.get_min = atom_get_min_pstate,
.get_turbo = atom_get_turbo_pstate,
.get_val = atom_get_val,
.get_scaling = silvermont_get_scaling,
.get_vid = atom_get_vid,
.get_target_pstate = get_target_pstate_use_cpu_load,
},
};
static const struct cpu_defaults airmont_params = {
.pid_policy = {
.sample_rate_ms = 10,
.deadband = 0,
.setpoint = 60,
.p_gain_pct = 14,
.d_gain_pct = 0,
.i_gain_pct = 4,
},
.funcs = {
.get_max = atom_get_max_pstate,
.get_max_physical = atom_get_max_pstate,
.get_min = atom_get_min_pstate,
.get_turbo = atom_get_turbo_pstate,
.get_val = atom_get_val,
.get_scaling = airmont_get_scaling,
.get_vid = atom_get_vid,
.get_target_pstate = get_target_pstate_use_cpu_load,
},
};
static const struct cpu_defaults knl_params = {
.pid_policy = {
.sample_rate_ms = 10,
.deadband = 0,
.setpoint = 97,
.p_gain_pct = 20,
.d_gain_pct = 0,
.i_gain_pct = 0,
},
.funcs = {
.get_max = core_get_max_pstate,
.get_max_physical = core_get_max_pstate_physical,
.get_min = core_get_min_pstate,
.get_turbo = knl_get_turbo_pstate,
.get_scaling = core_get_scaling,
.get_val = core_get_val,
.get_target_pstate = get_target_pstate_use_performance,
},
};
static const struct cpu_defaults bxt_params = {
.pid_policy = {
.sample_rate_ms = 10,
.deadband = 0,
.setpoint = 60,
.p_gain_pct = 14,
.d_gain_pct = 0,
.i_gain_pct = 4,
},
.funcs = {
.get_max = core_get_max_pstate,
.get_max_physical = core_get_max_pstate_physical,
.get_min = core_get_min_pstate,
.get_turbo = core_get_turbo_pstate,
.get_scaling = core_get_scaling,
.get_val = core_get_val,
.get_target_pstate = get_target_pstate_use_cpu_load,
},
};
static void intel_pstate_get_min_max(struct cpudata *cpu, int *min, int *max)
static int intel_pstate_get_base_pstate(struct cpudata *cpu)
{
int max_perf = cpu->pstate.turbo_pstate;
int max_perf_adj;
int min_perf;
struct perf_limits *perf_limits = &global;
if (global.no_turbo || global.turbo_disabled)
max_perf = cpu->pstate.max_pstate;
if (per_cpu_limits)
perf_limits = cpu->perf_limits;
/*
* performance can be limited by user through sysfs, by cpufreq
* policy, or by cpu specific default values determined through
* experimentation.
*/
max_perf_adj = fp_ext_toint(max_perf * perf_limits->max_perf);
*max = clamp_t(int, max_perf_adj,
cpu->pstate.min_pstate, cpu->pstate.turbo_pstate);
min_perf = fp_ext_toint(max_perf * perf_limits->min_perf);
*min = clamp_t(int, min_perf, cpu->pstate.min_pstate, max_perf);
return global.no_turbo || global.turbo_disabled ?
cpu->pstate.max_pstate : cpu->pstate.turbo_pstate;
}
static void intel_pstate_set_pstate(struct cpudata *cpu, int pstate)
......@@ -1702,11 +1522,13 @@ static void intel_pstate_set_min_pstate(struct cpudata *cpu)
static void intel_pstate_max_within_limits(struct cpudata *cpu)
{
int min_pstate, max_pstate;
int pstate;
update_turbo_state();
intel_pstate_get_min_max(cpu, &min_pstate, &max_pstate);
intel_pstate_set_pstate(cpu, max_pstate);
pstate = intel_pstate_get_base_pstate(cpu);
pstate = max(cpu->pstate.min_pstate,
fp_ext_toint(pstate * cpu->max_perf));
intel_pstate_set_pstate(cpu, pstate);
}
static void intel_pstate_get_cpu_pstates(struct cpudata *cpu)
......@@ -1767,7 +1589,11 @@ static inline bool intel_pstate_sample(struct cpudata *cpu, u64 time)
* that sample.time will always be reset before setting the utilization
* update hook and make the caller skip the sample then.
*/
return !!cpu->last_sample_time;
if (cpu->last_sample_time) {
intel_pstate_calc_avg_perf(cpu);
return true;
}
return false;
}
static inline int32_t get_avg_frequency(struct cpudata *cpu)
......@@ -1788,6 +1614,9 @@ static inline int32_t get_target_pstate_use_cpu_load(struct cpudata *cpu)
int32_t busy_frac, boost;
int target, avg_pstate;
if (cpu->policy == CPUFREQ_POLICY_PERFORMANCE)
return cpu->pstate.turbo_pstate;
busy_frac = div_fp(sample->mperf, sample->tsc);
boost = cpu->iowait_boost;
......@@ -1824,6 +1653,9 @@ static inline int32_t get_target_pstate_use_performance(struct cpudata *cpu)
int32_t perf_scaled, max_pstate, current_pstate, sample_ratio;
u64 duration_ns;
if (cpu->policy == CPUFREQ_POLICY_PERFORMANCE)
return cpu->pstate.turbo_pstate;
/*
* perf_scaled is the ratio of the average P-state during the last
* sampling period to the P-state requested last time (in percent).
......@@ -1858,11 +1690,13 @@ static inline int32_t get_target_pstate_use_performance(struct cpudata *cpu)
static int intel_pstate_prepare_request(struct cpudata *cpu, int pstate)
{
int max_perf, min_perf;
int max_pstate = intel_pstate_get_base_pstate(cpu);
int min_pstate;
intel_pstate_get_min_max(cpu, &min_perf, &max_perf);
pstate = clamp_t(int, pstate, min_perf, max_perf);
return pstate;
min_pstate = max(cpu->pstate.min_pstate,
fp_ext_toint(max_pstate * cpu->min_perf));
max_pstate = max(min_pstate, fp_ext_toint(max_pstate * cpu->max_perf));
return clamp_t(int, pstate, min_pstate, max_pstate);
}
static void intel_pstate_update_pstate(struct cpudata *cpu, int pstate)
......@@ -1874,16 +1708,11 @@ static void intel_pstate_update_pstate(struct cpudata *cpu, int pstate)
wrmsrl(MSR_IA32_PERF_CTL, pstate_funcs.get_val(cpu, pstate));
}
static inline void intel_pstate_adjust_busy_pstate(struct cpudata *cpu)
static void intel_pstate_adjust_pstate(struct cpudata *cpu, int target_pstate)
{
int from, target_pstate;
int from = cpu->pstate.current_pstate;
struct sample *sample;
from = cpu->pstate.current_pstate;
target_pstate = cpu->policy == CPUFREQ_POLICY_PERFORMANCE ?
cpu->pstate.turbo_pstate : pstate_funcs.get_target_pstate(cpu);
update_turbo_state();
target_pstate = intel_pstate_prepare_request(cpu, target_pstate);
......@@ -1902,13 +1731,39 @@ static inline void intel_pstate_adjust_busy_pstate(struct cpudata *cpu)
fp_toint(cpu->iowait_boost * 100));
}
static void intel_pstate_update_util_hwp(struct update_util_data *data,
u64 time, unsigned int flags)
{
struct cpudata *cpu = container_of(data, struct cpudata, update_util);
u64 delta_ns = time - cpu->sample.time;
if ((s64)delta_ns >= INTEL_PSTATE_HWP_SAMPLING_INTERVAL)
intel_pstate_sample(cpu, time);
}
static void intel_pstate_update_util_pid(struct update_util_data *data,
u64 time, unsigned int flags)
{
struct cpudata *cpu = container_of(data, struct cpudata, update_util);
u64 delta_ns = time - cpu->sample.time;
if ((s64)delta_ns < pid_params.sample_rate_ns)
return;
if (intel_pstate_sample(cpu, time)) {
int target_pstate;
target_pstate = get_target_pstate_use_performance(cpu);
intel_pstate_adjust_pstate(cpu, target_pstate);
}
}
static void intel_pstate_update_util(struct update_util_data *data, u64 time,
unsigned int flags)
{
struct cpudata *cpu = container_of(data, struct cpudata, update_util);
u64 delta_ns;
if (pstate_funcs.get_target_pstate == get_target_pstate_use_cpu_load) {
if (flags & SCHED_CPUFREQ_IOWAIT) {
cpu->iowait_boost = int_tofp(1);
} else if (cpu->iowait_boost) {
......@@ -1918,60 +1773,113 @@ static void intel_pstate_update_util(struct update_util_data *data, u64 time,
cpu->iowait_boost = 0;
}
cpu->last_update = time;
}
delta_ns = time - cpu->sample.time;
if ((s64)delta_ns >= pid_params.sample_rate_ns) {
bool sample_taken = intel_pstate_sample(cpu, time);
if ((s64)delta_ns < INTEL_PSTATE_DEFAULT_SAMPLING_INTERVAL)
return;
if (sample_taken) {
intel_pstate_calc_avg_perf(cpu);
if (!hwp_active)
intel_pstate_adjust_busy_pstate(cpu);
}
if (intel_pstate_sample(cpu, time)) {
int target_pstate;
target_pstate = get_target_pstate_use_cpu_load(cpu);
intel_pstate_adjust_pstate(cpu, target_pstate);
}
}
static struct pstate_funcs core_funcs = {
.get_max = core_get_max_pstate,
.get_max_physical = core_get_max_pstate_physical,
.get_min = core_get_min_pstate,
.get_turbo = core_get_turbo_pstate,
.get_scaling = core_get_scaling,
.get_val = core_get_val,
.update_util = intel_pstate_update_util_pid,
};
static const struct pstate_funcs silvermont_funcs = {
.get_max = atom_get_max_pstate,
.get_max_physical = atom_get_max_pstate,
.get_min = atom_get_min_pstate,
.get_turbo = atom_get_turbo_pstate,
.get_val = atom_get_val,
.get_scaling = silvermont_get_scaling,
.get_vid = atom_get_vid,
.update_util = intel_pstate_update_util,
};
static const struct pstate_funcs airmont_funcs = {
.get_max = atom_get_max_pstate,
.get_max_physical = atom_get_max_pstate,
.get_min = atom_get_min_pstate,
.get_turbo = atom_get_turbo_pstate,
.get_val = atom_get_val,
.get_scaling = airmont_get_scaling,
.get_vid = atom_get_vid,
.update_util = intel_pstate_update_util,
};
static const struct pstate_funcs knl_funcs = {
.get_max = core_get_max_pstate,
.get_max_physical = core_get_max_pstate_physical,
.get_min = core_get_min_pstate,
.get_turbo = knl_get_turbo_pstate,
.get_scaling = core_get_scaling,
.get_val = core_get_val,
.update_util = intel_pstate_update_util_pid,
};
static const struct pstate_funcs bxt_funcs = {
.get_max = core_get_max_pstate,
.get_max_physical = core_get_max_pstate_physical,
.get_min = core_get_min_pstate,
.get_turbo = core_get_turbo_pstate,
.get_scaling = core_get_scaling,
.get_val = core_get_val,
.update_util = intel_pstate_update_util,
};
#define ICPU(model, policy) \
{ X86_VENDOR_INTEL, 6, model, X86_FEATURE_APERFMPERF,\
(unsigned long)&policy }
static const struct x86_cpu_id intel_pstate_cpu_ids[] = {
ICPU(INTEL_FAM6_SANDYBRIDGE, core_params),
ICPU(INTEL_FAM6_SANDYBRIDGE_X, core_params),
ICPU(INTEL_FAM6_ATOM_SILVERMONT1, silvermont_params),
ICPU(INTEL_FAM6_IVYBRIDGE, core_params),
ICPU(INTEL_FAM6_HASWELL_CORE, core_params),
ICPU(INTEL_FAM6_BROADWELL_CORE, core_params),
ICPU(INTEL_FAM6_IVYBRIDGE_X, core_params),
ICPU(INTEL_FAM6_HASWELL_X, core_params),
ICPU(INTEL_FAM6_HASWELL_ULT, core_params),
ICPU(INTEL_FAM6_HASWELL_GT3E, core_params),
ICPU(INTEL_FAM6_BROADWELL_GT3E, core_params),
ICPU(INTEL_FAM6_ATOM_AIRMONT, airmont_params),
ICPU(INTEL_FAM6_SKYLAKE_MOBILE, core_params),
ICPU(INTEL_FAM6_BROADWELL_X, core_params),
ICPU(INTEL_FAM6_SKYLAKE_DESKTOP, core_params),
ICPU(INTEL_FAM6_BROADWELL_XEON_D, core_params),
ICPU(INTEL_FAM6_XEON_PHI_KNL, knl_params),
ICPU(INTEL_FAM6_XEON_PHI_KNM, knl_params),
ICPU(INTEL_FAM6_ATOM_GOLDMONT, bxt_params),
ICPU(INTEL_FAM6_SANDYBRIDGE, core_funcs),
ICPU(INTEL_FAM6_SANDYBRIDGE_X, core_funcs),
ICPU(INTEL_FAM6_ATOM_SILVERMONT1, silvermont_funcs),
ICPU(INTEL_FAM6_IVYBRIDGE, core_funcs),
ICPU(INTEL_FAM6_HASWELL_CORE, core_funcs),
ICPU(INTEL_FAM6_BROADWELL_CORE, core_funcs),
ICPU(INTEL_FAM6_IVYBRIDGE_X, core_funcs),
ICPU(INTEL_FAM6_HASWELL_X, core_funcs),
ICPU(INTEL_FAM6_HASWELL_ULT, core_funcs),
ICPU(INTEL_FAM6_HASWELL_GT3E, core_funcs),
ICPU(INTEL_FAM6_BROADWELL_GT3E, core_funcs),
ICPU(INTEL_FAM6_ATOM_AIRMONT, airmont_funcs),
ICPU(INTEL_FAM6_SKYLAKE_MOBILE, core_funcs),
ICPU(INTEL_FAM6_BROADWELL_X, core_funcs),
ICPU(INTEL_FAM6_SKYLAKE_DESKTOP, core_funcs),
ICPU(INTEL_FAM6_BROADWELL_XEON_D, core_funcs),
ICPU(INTEL_FAM6_XEON_PHI_KNL, knl_funcs),
ICPU(INTEL_FAM6_XEON_PHI_KNM, knl_funcs),
ICPU(INTEL_FAM6_ATOM_GOLDMONT, bxt_funcs),
ICPU(INTEL_FAM6_ATOM_GEMINI_LAKE, bxt_funcs),
{}
};
MODULE_DEVICE_TABLE(x86cpu, intel_pstate_cpu_ids);
static const struct x86_cpu_id intel_pstate_cpu_oob_ids[] __initconst = {
ICPU(INTEL_FAM6_BROADWELL_XEON_D, core_params),
ICPU(INTEL_FAM6_BROADWELL_X, core_params),
ICPU(INTEL_FAM6_SKYLAKE_X, core_params),
ICPU(INTEL_FAM6_BROADWELL_XEON_D, core_funcs),
ICPU(INTEL_FAM6_BROADWELL_X, core_funcs),
ICPU(INTEL_FAM6_SKYLAKE_X, core_funcs),
{}
};
static const struct x86_cpu_id intel_pstate_cpu_ee_disable_ids[] = {
ICPU(INTEL_FAM6_KABYLAKE_DESKTOP, core_params),
ICPU(INTEL_FAM6_KABYLAKE_DESKTOP, core_funcs),
{}
};
static bool pid_in_use(void);
static int intel_pstate_init_cpu(unsigned int cpunum)
{
struct cpudata *cpu;
......@@ -1979,18 +1887,11 @@ static int intel_pstate_init_cpu(unsigned int cpunum)
cpu = all_cpu_data[cpunum];
if (!cpu) {
unsigned int size = sizeof(struct cpudata);
if (per_cpu_limits)
size += sizeof(struct perf_limits);
cpu = kzalloc(size, GFP_KERNEL);
cpu = kzalloc(sizeof(*cpu), GFP_KERNEL);
if (!cpu)
return -ENOMEM;
all_cpu_data[cpunum] = cpu;
if (per_cpu_limits)
cpu->perf_limits = (struct perf_limits *)(cpu + 1);
cpu->epp_default = -EINVAL;
cpu->epp_powersave = -EINVAL;
......@@ -2009,14 +1910,12 @@ static int intel_pstate_init_cpu(unsigned int cpunum)
intel_pstate_disable_ee(cpunum);
intel_pstate_hwp_enable(cpu);
pid_params.sample_rate_ms = 50;
pid_params.sample_rate_ns = 50 * NSEC_PER_MSEC;
} else if (pid_in_use()) {
intel_pstate_pid_reset(cpu);
}
intel_pstate_get_cpu_pstates(cpu);
intel_pstate_busy_pid_reset(cpu);
pr_debug("controlling: cpu %d\n", cpunum);
return 0;
......@@ -2039,7 +1938,7 @@ static void intel_pstate_set_update_util_hook(unsigned int cpu_num)
/* Prevent intel_pstate_update_util() from using stale data. */
cpu->sample.time = 0;
cpufreq_add_update_util_hook(cpu_num, &cpu->update_util,
intel_pstate_update_util);
pstate_funcs.update_util);
cpu->update_util_set = true;
}
......@@ -2055,46 +1954,68 @@ static void intel_pstate_clear_update_util_hook(unsigned int cpu)
synchronize_sched();
}
static int intel_pstate_get_max_freq(struct cpudata *cpu)
{
return global.turbo_disabled || global.no_turbo ?
cpu->pstate.max_freq : cpu->pstate.turbo_freq;
}
static void intel_pstate_update_perf_limits(struct cpufreq_policy *policy,
struct perf_limits *limits)
struct cpudata *cpu)
{
int max_freq = intel_pstate_get_max_freq(cpu);
int32_t max_policy_perf, min_policy_perf;
max_policy_perf = div_ext_fp(policy->max, policy->cpuinfo.max_freq);
max_policy_perf = div_ext_fp(policy->max, max_freq);
max_policy_perf = clamp_t(int32_t, max_policy_perf, 0, int_ext_tofp(1));
if (policy->max == policy->min) {
min_policy_perf = max_policy_perf;
} else {
min_policy_perf = div_ext_fp(policy->min,
policy->cpuinfo.max_freq);
min_policy_perf = div_ext_fp(policy->min, max_freq);
min_policy_perf = clamp_t(int32_t, min_policy_perf,
0, max_policy_perf);
}
/* Normalize user input to [min_perf, max_perf] */
limits->min_perf = max(min_policy_perf,
percent_ext_fp(limits->min_sysfs_pct));
limits->min_perf = min(limits->min_perf, max_policy_perf);
limits->max_perf = min(max_policy_perf,
percent_ext_fp(limits->max_sysfs_pct));
limits->max_perf = max(min_policy_perf, limits->max_perf);
if (per_cpu_limits) {
cpu->min_perf = min_policy_perf;
cpu->max_perf = max_policy_perf;
} else {
int32_t global_min, global_max;
/* Global limits are in percent of the maximum turbo P-state. */
global_max = percent_ext_fp(global.max_perf_pct);
global_min = percent_ext_fp(global.min_perf_pct);
if (max_freq != cpu->pstate.turbo_freq) {
int32_t turbo_factor;
turbo_factor = div_ext_fp(cpu->pstate.turbo_pstate,
cpu->pstate.max_pstate);
global_min = mul_ext_fp(global_min, turbo_factor);
global_max = mul_ext_fp(global_max, turbo_factor);
}
global_min = clamp_t(int32_t, global_min, 0, global_max);
cpu->min_perf = max(min_policy_perf, global_min);
cpu->min_perf = min(cpu->min_perf, max_policy_perf);
cpu->max_perf = min(max_policy_perf, global_max);
cpu->max_perf = max(min_policy_perf, cpu->max_perf);
/* Make sure min_perf <= max_perf */
limits->min_perf = min(limits->min_perf, limits->max_perf);
cpu->min_perf = min(cpu->min_perf, cpu->max_perf);
}
limits->max_perf = round_up(limits->max_perf, EXT_FRAC_BITS);
limits->min_perf = round_up(limits->min_perf, EXT_FRAC_BITS);
limits->max_perf_pct = fp_ext_toint(limits->max_perf * 100);
limits->min_perf_pct = fp_ext_toint(limits->min_perf * 100);
cpu->max_perf = round_up(cpu->max_perf, EXT_FRAC_BITS);
cpu->min_perf = round_up(cpu->min_perf, EXT_FRAC_BITS);
pr_debug("cpu:%d max_perf_pct:%d min_perf_pct:%d\n", policy->cpu,
limits->max_perf_pct, limits->min_perf_pct);
fp_ext_toint(cpu->max_perf * 100),
fp_ext_toint(cpu->min_perf * 100));
}
static int intel_pstate_set_policy(struct cpufreq_policy *policy)
{
struct cpudata *cpu;
struct perf_limits *perf_limits = &global;
if (!policy->cpuinfo.max_freq)
return -ENODEV;
......@@ -2105,19 +2026,9 @@ static int intel_pstate_set_policy(struct cpufreq_policy *policy)
cpu = all_cpu_data[policy->cpu];
cpu->policy = policy->policy;
if (cpu->pstate.max_pstate_physical > cpu->pstate.max_pstate &&
policy->max < policy->cpuinfo.max_freq &&
policy->max > cpu->pstate.max_pstate * cpu->pstate.scaling) {
pr_debug("policy->max > max non turbo frequency\n");
policy->max = policy->cpuinfo.max_freq;
}
if (per_cpu_limits)
perf_limits = cpu->perf_limits;
mutex_lock(&intel_pstate_limits_lock);
intel_pstate_update_perf_limits(policy, perf_limits);
intel_pstate_update_perf_limits(policy, cpu);
if (cpu->policy == CPUFREQ_POLICY_PERFORMANCE) {
/*
......@@ -2130,38 +2041,38 @@ static int intel_pstate_set_policy(struct cpufreq_policy *policy)
intel_pstate_set_update_util_hook(policy->cpu);
intel_pstate_hwp_set_policy(policy);
if (hwp_active)
intel_pstate_hwp_set(policy->cpu);
mutex_unlock(&intel_pstate_limits_lock);
return 0;
}
static void intel_pstate_adjust_policy_max(struct cpufreq_policy *policy,
struct cpudata *cpu)
{
if (cpu->pstate.max_pstate_physical > cpu->pstate.max_pstate &&
policy->max < policy->cpuinfo.max_freq &&
policy->max > cpu->pstate.max_freq) {
pr_debug("policy->max > max non turbo frequency\n");
policy->max = policy->cpuinfo.max_freq;
}
}
static int intel_pstate_verify_policy(struct cpufreq_policy *policy)
{
struct cpudata *cpu = all_cpu_data[policy->cpu];
update_turbo_state();
policy->cpuinfo.max_freq = global.turbo_disabled || global.no_turbo ?
cpu->pstate.max_freq :
cpu->pstate.turbo_freq;
cpufreq_verify_within_cpu_limits(policy);
cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
intel_pstate_get_max_freq(cpu));
if (policy->policy != CPUFREQ_POLICY_POWERSAVE &&
policy->policy != CPUFREQ_POLICY_PERFORMANCE)
return -EINVAL;
/* When per-CPU limits are used, sysfs limits are not used */
if (!per_cpu_limits) {
unsigned int max_freq, min_freq;
max_freq = policy->cpuinfo.max_freq *
global.max_sysfs_pct / 100;
min_freq = policy->cpuinfo.max_freq *
global.min_sysfs_pct / 100;
cpufreq_verify_within_limits(policy, min_freq, max_freq);
}
intel_pstate_adjust_policy_max(policy, cpu);
return 0;
}
......@@ -2202,8 +2113,8 @@ static int __intel_pstate_cpu_init(struct cpufreq_policy *policy)
cpu = all_cpu_data[policy->cpu];
if (per_cpu_limits)
intel_pstate_init_limits(cpu->perf_limits);
cpu->max_perf = int_ext_tofp(1);
cpu->min_perf = 0;
policy->min = cpu->pstate.min_pstate * cpu->pstate.scaling;
policy->max = cpu->pstate.turbo_pstate * cpu->pstate.scaling;
......@@ -2257,10 +2168,12 @@ static int intel_cpufreq_verify_policy(struct cpufreq_policy *policy)
struct cpudata *cpu = all_cpu_data[policy->cpu];
update_turbo_state();
policy->cpuinfo.max_freq = global.no_turbo || global.turbo_disabled ?
cpu->pstate.max_freq : cpu->pstate.turbo_freq;
cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
intel_pstate_get_max_freq(cpu));
cpufreq_verify_within_cpu_limits(policy);
intel_pstate_adjust_policy_max(policy, cpu);
intel_pstate_update_perf_limits(policy, cpu);
return 0;
}
......@@ -2341,7 +2254,13 @@ static struct cpufreq_driver intel_cpufreq = {
.name = "intel_cpufreq",
};
static struct cpufreq_driver *intel_pstate_driver = &intel_pstate;
static struct cpufreq_driver *default_driver = &intel_pstate;
static bool pid_in_use(void)
{
return intel_pstate_driver == &intel_pstate &&
pstate_funcs.update_util == intel_pstate_update_util_pid;
}
static void intel_pstate_driver_cleanup(void)
{
......@@ -2358,26 +2277,26 @@ static void intel_pstate_driver_cleanup(void)
}
}
put_online_cpus();
intel_pstate_driver = NULL;
}
static int intel_pstate_register_driver(void)
static int intel_pstate_register_driver(struct cpufreq_driver *driver)
{
int ret;
intel_pstate_init_limits(&global);
memset(&global, 0, sizeof(global));
global.max_perf_pct = 100;
intel_pstate_driver = driver;
ret = cpufreq_register_driver(intel_pstate_driver);
if (ret) {
intel_pstate_driver_cleanup();
return ret;
}
mutex_lock(&intel_pstate_limits_lock);
driver_registered = true;
mutex_unlock(&intel_pstate_limits_lock);
global.min_perf_pct = min_perf_pct_min();
if (intel_pstate_driver == &intel_pstate && !hwp_active &&
pstate_funcs.get_target_pstate != get_target_pstate_use_cpu_load)
if (pid_in_use())
intel_pstate_debug_expose_params();
return 0;
......@@ -2388,14 +2307,9 @@ static int intel_pstate_unregister_driver(void)
if (hwp_active)
return -EBUSY;
if (intel_pstate_driver == &intel_pstate && !hwp_active &&
pstate_funcs.get_target_pstate != get_target_pstate_use_cpu_load)
if (pid_in_use())
intel_pstate_debug_hide_params();
mutex_lock(&intel_pstate_limits_lock);
driver_registered = false;
mutex_unlock(&intel_pstate_limits_lock);
cpufreq_unregister_driver(intel_pstate_driver);
intel_pstate_driver_cleanup();
......@@ -2404,7 +2318,7 @@ static int intel_pstate_unregister_driver(void)
static ssize_t intel_pstate_show_status(char *buf)
{
if (!driver_registered)
if (!intel_pstate_driver)
return sprintf(buf, "off\n");
return sprintf(buf, "%s\n", intel_pstate_driver == &intel_pstate ?
......@@ -2416,11 +2330,11 @@ static int intel_pstate_update_status(const char *buf, size_t size)
int ret;
if (size == 3 && !strncmp(buf, "off", size))
return driver_registered ?
return intel_pstate_driver ?
intel_pstate_unregister_driver() : -EINVAL;
if (size == 6 && !strncmp(buf, "active", size)) {
if (driver_registered) {
if (intel_pstate_driver) {
if (intel_pstate_driver == &intel_pstate)
return 0;
......@@ -2429,13 +2343,12 @@ static int intel_pstate_update_status(const char *buf, size_t size)
return ret;
}
intel_pstate_driver = &intel_pstate;
return intel_pstate_register_driver();
return intel_pstate_register_driver(&intel_pstate);
}
if (size == 7 && !strncmp(buf, "passive", size)) {
if (driver_registered) {
if (intel_pstate_driver != &intel_pstate)
if (intel_pstate_driver) {
if (intel_pstate_driver == &intel_cpufreq)
return 0;
ret = intel_pstate_unregister_driver();
......@@ -2443,8 +2356,7 @@ static int intel_pstate_update_status(const char *buf, size_t size)
return ret;
}
intel_pstate_driver = &intel_cpufreq;
return intel_pstate_register_driver();
return intel_pstate_register_driver(&intel_cpufreq);
}
return -EINVAL;
......@@ -2465,23 +2377,17 @@ static int __init intel_pstate_msrs_not_valid(void)
return 0;
}
static void __init copy_pid_params(struct pstate_adjust_policy *policy)
{
pid_params.sample_rate_ms = policy->sample_rate_ms;
pid_params.sample_rate_ns = pid_params.sample_rate_ms * NSEC_PER_MSEC;
pid_params.p_gain_pct = policy->p_gain_pct;
pid_params.i_gain_pct = policy->i_gain_pct;
pid_params.d_gain_pct = policy->d_gain_pct;
pid_params.deadband = policy->deadband;
pid_params.setpoint = policy->setpoint;
}
#ifdef CONFIG_ACPI
static void intel_pstate_use_acpi_profile(void)
{
if (acpi_gbl_FADT.preferred_profile == PM_MOBILE)
pstate_funcs.get_target_pstate =
get_target_pstate_use_cpu_load;
switch (acpi_gbl_FADT.preferred_profile) {
case PM_MOBILE:
case PM_TABLET:
case PM_APPLIANCE_PC:
case PM_DESKTOP:
case PM_WORKSTATION:
pstate_funcs.update_util = intel_pstate_update_util;
}
}
#else
static void intel_pstate_use_acpi_profile(void)
......@@ -2498,7 +2404,7 @@ static void __init copy_cpu_funcs(struct pstate_funcs *funcs)
pstate_funcs.get_scaling = funcs->get_scaling;
pstate_funcs.get_val = funcs->get_val;
pstate_funcs.get_vid = funcs->get_vid;
pstate_funcs.get_target_pstate = funcs->get_target_pstate;
pstate_funcs.update_util = funcs->update_util;
intel_pstate_use_acpi_profile();
}
......@@ -2637,28 +2543,30 @@ static const struct x86_cpu_id hwp_support_ids[] __initconst = {
static int __init intel_pstate_init(void)
{
const struct x86_cpu_id *id;
struct cpu_defaults *cpu_def;
int rc = 0;
int rc;
if (no_load)
return -ENODEV;
if (x86_match_cpu(hwp_support_ids) && !no_hwp) {
copy_cpu_funcs(&core_params.funcs);
if (x86_match_cpu(hwp_support_ids)) {
copy_cpu_funcs(&core_funcs);
if (no_hwp) {
pstate_funcs.update_util = intel_pstate_update_util;
} else {
hwp_active++;
intel_pstate.attr = hwp_cpufreq_attrs;
pstate_funcs.update_util = intel_pstate_update_util_hwp;
goto hwp_cpu_matched;
}
} else {
const struct x86_cpu_id *id;
id = x86_match_cpu(intel_pstate_cpu_ids);
if (!id)
return -ENODEV;
cpu_def = (struct cpu_defaults *)id->driver_data;
copy_pid_params(&cpu_def->pid_policy);
copy_cpu_funcs(&cpu_def->funcs);
copy_cpu_funcs((struct pstate_funcs *)id->driver_data);
}
if (intel_pstate_msrs_not_valid())
return -ENODEV;
......@@ -2685,7 +2593,7 @@ static int __init intel_pstate_init(void)
intel_pstate_sysfs_expose_params();
mutex_lock(&intel_pstate_driver_lock);
rc = intel_pstate_register_driver();
rc = intel_pstate_register_driver(default_driver);
mutex_unlock(&intel_pstate_driver_lock);
if (rc)
return rc;
......@@ -2706,7 +2614,7 @@ static int __init intel_pstate_setup(char *str)
no_load = 1;
} else if (!strcmp(str, "passive")) {
pr_info("Passive mode enabled\n");
intel_pstate_driver = &intel_cpufreq;
default_driver = &intel_cpufreq;
no_hwp = 1;
}
if (!strcmp(str, "no_hwp")) {
......
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