2013-02-06 10:02:13 -07:00
|
|
|
/*
|
2013-04-09 16:38:18 -06:00
|
|
|
* intel_pstate.c: Native P state management for Intel processors
|
2013-02-06 10:02:13 -07:00
|
|
|
*
|
|
|
|
* (C) Copyright 2012 Intel Corporation
|
|
|
|
* Author: Dirk Brandewie <dirk.j.brandewie@intel.com>
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or
|
|
|
|
* modify it under the terms of the GNU General Public License
|
|
|
|
* as published by the Free Software Foundation; version 2
|
|
|
|
* of the License.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/kernel_stat.h>
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/ktime.h>
|
|
|
|
#include <linux/hrtimer.h>
|
|
|
|
#include <linux/tick.h>
|
|
|
|
#include <linux/slab.h>
|
|
|
|
#include <linux/sched.h>
|
|
|
|
#include <linux/list.h>
|
|
|
|
#include <linux/cpu.h>
|
|
|
|
#include <linux/cpufreq.h>
|
|
|
|
#include <linux/sysfs.h>
|
|
|
|
#include <linux/types.h>
|
|
|
|
#include <linux/fs.h>
|
|
|
|
#include <linux/debugfs.h>
|
2013-10-31 09:24:05 -06:00
|
|
|
#include <linux/acpi.h>
|
2013-02-06 10:02:13 -07:00
|
|
|
#include <trace/events/power.h>
|
|
|
|
|
|
|
|
#include <asm/div64.h>
|
|
|
|
#include <asm/msr.h>
|
|
|
|
#include <asm/cpu_device_id.h>
|
2015-04-03 07:19:53 -06:00
|
|
|
#include <asm/cpufeature.h>
|
2013-02-06 10:02:13 -07:00
|
|
|
|
2014-02-12 11:01:07 -07:00
|
|
|
#define BYT_RATIOS 0x66a
|
|
|
|
#define BYT_VIDS 0x66b
|
|
|
|
#define BYT_TURBO_RATIOS 0x66c
|
2014-05-08 13:57:23 -06:00
|
|
|
#define BYT_TURBO_VIDS 0x66d
|
2014-02-12 11:01:07 -07:00
|
|
|
|
2014-05-29 10:32:23 -06:00
|
|
|
#define FRAC_BITS 8
|
2013-02-06 10:02:13 -07:00
|
|
|
#define int_tofp(X) ((int64_t)(X) << FRAC_BITS)
|
|
|
|
#define fp_toint(X) ((X) >> FRAC_BITS)
|
2014-05-29 10:32:23 -06:00
|
|
|
|
2013-02-06 10:02:13 -07:00
|
|
|
|
|
|
|
static inline int32_t mul_fp(int32_t x, int32_t y)
|
|
|
|
{
|
|
|
|
return ((int64_t)x * (int64_t)y) >> FRAC_BITS;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline int32_t div_fp(int32_t x, int32_t y)
|
|
|
|
{
|
2014-07-18 09:37:18 -06:00
|
|
|
return div_s64((int64_t)x << FRAC_BITS, y);
|
2013-02-06 10:02:13 -07:00
|
|
|
}
|
|
|
|
|
2014-10-13 09:37:44 -06:00
|
|
|
static inline int ceiling_fp(int32_t x)
|
|
|
|
{
|
|
|
|
int mask, ret;
|
|
|
|
|
|
|
|
ret = fp_toint(x);
|
|
|
|
mask = (1 << FRAC_BITS) - 1;
|
|
|
|
if (x & mask)
|
|
|
|
ret += 1;
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2013-02-06 10:02:13 -07:00
|
|
|
struct sample {
|
2013-10-21 10:20:32 -06:00
|
|
|
int32_t core_pct_busy;
|
2013-02-06 10:02:13 -07:00
|
|
|
u64 aperf;
|
|
|
|
u64 mperf;
|
2015-04-11 22:10:26 -06:00
|
|
|
u64 tsc;
|
2013-02-06 10:02:13 -07:00
|
|
|
int freq;
|
2014-05-29 10:32:24 -06:00
|
|
|
ktime_t time;
|
2013-02-06 10:02:13 -07:00
|
|
|
};
|
|
|
|
|
|
|
|
struct pstate_data {
|
|
|
|
int current_pstate;
|
|
|
|
int min_pstate;
|
|
|
|
int max_pstate;
|
2014-10-13 09:37:43 -06:00
|
|
|
int scaling;
|
2013-02-06 10:02:13 -07:00
|
|
|
int turbo_pstate;
|
|
|
|
};
|
|
|
|
|
2013-12-18 11:32:39 -07:00
|
|
|
struct vid_data {
|
2014-05-08 13:57:23 -06:00
|
|
|
int min;
|
|
|
|
int max;
|
|
|
|
int turbo;
|
2013-12-18 11:32:39 -07:00
|
|
|
int32_t ratio;
|
|
|
|
};
|
|
|
|
|
2013-02-06 10:02:13 -07:00
|
|
|
struct _pid {
|
|
|
|
int setpoint;
|
|
|
|
int32_t integral;
|
|
|
|
int32_t p_gain;
|
|
|
|
int32_t i_gain;
|
|
|
|
int32_t d_gain;
|
|
|
|
int deadband;
|
2013-10-21 10:20:32 -06:00
|
|
|
int32_t last_err;
|
2013-02-06 10:02:13 -07:00
|
|
|
};
|
|
|
|
|
|
|
|
struct cpudata {
|
|
|
|
int cpu;
|
|
|
|
|
|
|
|
struct timer_list timer;
|
|
|
|
|
|
|
|
struct pstate_data pstate;
|
2013-12-18 11:32:39 -07:00
|
|
|
struct vid_data vid;
|
2013-02-06 10:02:13 -07:00
|
|
|
struct _pid pid;
|
|
|
|
|
2014-05-29 10:32:24 -06:00
|
|
|
ktime_t last_sample_time;
|
2013-02-06 10:02:13 -07:00
|
|
|
u64 prev_aperf;
|
|
|
|
u64 prev_mperf;
|
2015-04-11 22:10:26 -06:00
|
|
|
u64 prev_tsc;
|
2014-02-12 11:01:04 -07:00
|
|
|
struct sample sample;
|
2013-02-06 10:02:13 -07:00
|
|
|
};
|
|
|
|
|
|
|
|
static struct cpudata **all_cpu_data;
|
|
|
|
struct pstate_adjust_policy {
|
|
|
|
int sample_rate_ms;
|
|
|
|
int deadband;
|
|
|
|
int setpoint;
|
|
|
|
int p_gain_pct;
|
|
|
|
int d_gain_pct;
|
|
|
|
int i_gain_pct;
|
|
|
|
};
|
|
|
|
|
2013-10-21 10:20:34 -06:00
|
|
|
struct pstate_funcs {
|
|
|
|
int (*get_max)(void);
|
|
|
|
int (*get_min)(void);
|
|
|
|
int (*get_turbo)(void);
|
2014-10-13 09:37:43 -06:00
|
|
|
int (*get_scaling)(void);
|
2013-12-18 11:32:39 -07:00
|
|
|
void (*set)(struct cpudata*, int pstate);
|
|
|
|
void (*get_vid)(struct cpudata *);
|
2013-02-06 10:02:13 -07:00
|
|
|
};
|
|
|
|
|
2013-10-21 10:20:34 -06:00
|
|
|
struct cpu_defaults {
|
|
|
|
struct pstate_adjust_policy pid_policy;
|
|
|
|
struct pstate_funcs funcs;
|
2013-02-06 10:02:13 -07:00
|
|
|
};
|
|
|
|
|
2013-10-21 10:20:34 -06:00
|
|
|
static struct pstate_adjust_policy pid_params;
|
|
|
|
static struct pstate_funcs pstate_funcs;
|
2014-11-06 10:40:47 -07:00
|
|
|
static int hwp_active;
|
2013-10-21 10:20:34 -06:00
|
|
|
|
2013-02-06 10:02:13 -07:00
|
|
|
struct perf_limits {
|
|
|
|
int no_turbo;
|
2014-06-20 08:27:59 -06:00
|
|
|
int turbo_disabled;
|
2013-02-06 10:02:13 -07:00
|
|
|
int max_perf_pct;
|
|
|
|
int min_perf_pct;
|
|
|
|
int32_t max_perf;
|
|
|
|
int32_t min_perf;
|
2013-05-07 09:20:26 -06:00
|
|
|
int max_policy_pct;
|
|
|
|
int max_sysfs_pct;
|
2015-01-29 14:03:52 -07:00
|
|
|
int min_policy_pct;
|
|
|
|
int min_sysfs_pct;
|
2013-02-06 10:02:13 -07:00
|
|
|
};
|
|
|
|
|
|
|
|
static struct perf_limits limits = {
|
|
|
|
.no_turbo = 0,
|
2014-10-13 09:37:41 -06:00
|
|
|
.turbo_disabled = 0,
|
2013-02-06 10:02:13 -07:00
|
|
|
.max_perf_pct = 100,
|
|
|
|
.max_perf = int_tofp(1),
|
|
|
|
.min_perf_pct = 0,
|
|
|
|
.min_perf = 0,
|
2013-05-07 09:20:26 -06:00
|
|
|
.max_policy_pct = 100,
|
|
|
|
.max_sysfs_pct = 100,
|
2015-01-29 14:03:52 -07:00
|
|
|
.min_policy_pct = 0,
|
|
|
|
.min_sysfs_pct = 0,
|
2013-02-06 10:02:13 -07:00
|
|
|
};
|
|
|
|
|
|
|
|
static inline void pid_reset(struct _pid *pid, int setpoint, int busy,
|
2014-07-18 09:37:23 -06:00
|
|
|
int deadband, int integral) {
|
2013-02-06 10:02:13 -07:00
|
|
|
pid->setpoint = setpoint;
|
|
|
|
pid->deadband = deadband;
|
|
|
|
pid->integral = int_tofp(integral);
|
2014-02-12 11:01:05 -07:00
|
|
|
pid->last_err = int_tofp(setpoint) - int_tofp(busy);
|
2013-02-06 10:02:13 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static inline void pid_p_gain_set(struct _pid *pid, int percent)
|
|
|
|
{
|
|
|
|
pid->p_gain = div_fp(int_tofp(percent), int_tofp(100));
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void pid_i_gain_set(struct _pid *pid, int percent)
|
|
|
|
{
|
|
|
|
pid->i_gain = div_fp(int_tofp(percent), int_tofp(100));
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void pid_d_gain_set(struct _pid *pid, int percent)
|
|
|
|
{
|
|
|
|
pid->d_gain = div_fp(int_tofp(percent), int_tofp(100));
|
|
|
|
}
|
|
|
|
|
2013-10-21 10:20:32 -06:00
|
|
|
static signed int pid_calc(struct _pid *pid, int32_t busy)
|
2013-02-06 10:02:13 -07:00
|
|
|
{
|
2013-10-21 10:20:32 -06:00
|
|
|
signed int result;
|
2013-02-06 10:02:13 -07:00
|
|
|
int32_t pterm, dterm, fp_error;
|
|
|
|
int32_t integral_limit;
|
|
|
|
|
2013-10-21 10:20:32 -06:00
|
|
|
fp_error = int_tofp(pid->setpoint) - busy;
|
2013-02-06 10:02:13 -07:00
|
|
|
|
2013-10-21 10:20:32 -06:00
|
|
|
if (abs(fp_error) <= int_tofp(pid->deadband))
|
2013-02-06 10:02:13 -07:00
|
|
|
return 0;
|
|
|
|
|
|
|
|
pterm = mul_fp(pid->p_gain, fp_error);
|
|
|
|
|
|
|
|
pid->integral += fp_error;
|
|
|
|
|
2014-12-10 13:39:38 -07:00
|
|
|
/*
|
|
|
|
* We limit the integral here so that it will never
|
|
|
|
* get higher than 30. This prevents it from becoming
|
|
|
|
* too large an input over long periods of time and allows
|
|
|
|
* it to get factored out sooner.
|
|
|
|
*
|
|
|
|
* The value of 30 was chosen through experimentation.
|
|
|
|
*/
|
2013-02-06 10:02:13 -07:00
|
|
|
integral_limit = int_tofp(30);
|
|
|
|
if (pid->integral > integral_limit)
|
|
|
|
pid->integral = integral_limit;
|
|
|
|
if (pid->integral < -integral_limit)
|
|
|
|
pid->integral = -integral_limit;
|
|
|
|
|
2013-10-21 10:20:32 -06:00
|
|
|
dterm = mul_fp(pid->d_gain, fp_error - pid->last_err);
|
|
|
|
pid->last_err = fp_error;
|
2013-02-06 10:02:13 -07:00
|
|
|
|
|
|
|
result = pterm + mul_fp(pid->integral, pid->i_gain) + dterm;
|
2014-06-17 14:36:10 -06:00
|
|
|
result = result + (1 << (FRAC_BITS-1));
|
2013-02-06 10:02:13 -07:00
|
|
|
return (signed int)fp_toint(result);
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void intel_pstate_busy_pid_reset(struct cpudata *cpu)
|
|
|
|
{
|
2013-10-21 10:20:34 -06:00
|
|
|
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);
|
2013-02-06 10:02:13 -07:00
|
|
|
|
2014-07-18 09:37:20 -06:00
|
|
|
pid_reset(&cpu->pid, pid_params.setpoint, 100, pid_params.deadband, 0);
|
2013-02-06 10:02:13 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static inline void intel_pstate_reset_all_pid(void)
|
|
|
|
{
|
|
|
|
unsigned int cpu;
|
2014-07-18 09:37:19 -06:00
|
|
|
|
2013-02-06 10:02:13 -07:00
|
|
|
for_each_online_cpu(cpu) {
|
|
|
|
if (all_cpu_data[cpu])
|
|
|
|
intel_pstate_busy_pid_reset(all_cpu_data[cpu]);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-10-13 09:37:41 -06:00
|
|
|
static inline void update_turbo_state(void)
|
|
|
|
{
|
|
|
|
u64 misc_en;
|
|
|
|
struct cpudata *cpu;
|
|
|
|
|
|
|
|
cpu = all_cpu_data[0];
|
|
|
|
rdmsrl(MSR_IA32_MISC_ENABLE, misc_en);
|
|
|
|
limits.turbo_disabled =
|
|
|
|
(misc_en & MSR_IA32_MISC_ENABLE_TURBO_DISABLE ||
|
|
|
|
cpu->pstate.max_pstate == cpu->pstate.turbo_pstate);
|
|
|
|
}
|
|
|
|
|
2014-11-06 10:40:47 -07:00
|
|
|
#define PCT_TO_HWP(x) (x * 255 / 100)
|
|
|
|
static void intel_pstate_hwp_set(void)
|
|
|
|
{
|
|
|
|
int min, max, cpu;
|
|
|
|
u64 value, freq;
|
|
|
|
|
|
|
|
get_online_cpus();
|
|
|
|
|
|
|
|
for_each_online_cpu(cpu) {
|
|
|
|
rdmsrl_on_cpu(cpu, MSR_HWP_REQUEST, &value);
|
|
|
|
min = PCT_TO_HWP(limits.min_perf_pct);
|
|
|
|
value &= ~HWP_MIN_PERF(~0L);
|
|
|
|
value |= HWP_MIN_PERF(min);
|
|
|
|
|
|
|
|
max = PCT_TO_HWP(limits.max_perf_pct);
|
|
|
|
if (limits.no_turbo) {
|
|
|
|
rdmsrl( MSR_HWP_CAPABILITIES, freq);
|
|
|
|
max = HWP_GUARANTEED_PERF(freq);
|
|
|
|
}
|
|
|
|
|
|
|
|
value &= ~HWP_MAX_PERF(~0L);
|
|
|
|
value |= HWP_MAX_PERF(max);
|
|
|
|
wrmsrl_on_cpu(cpu, MSR_HWP_REQUEST, value);
|
|
|
|
}
|
|
|
|
|
|
|
|
put_online_cpus();
|
|
|
|
}
|
|
|
|
|
2013-02-06 10:02:13 -07:00
|
|
|
/************************** debugfs begin ************************/
|
|
|
|
static int pid_param_set(void *data, u64 val)
|
|
|
|
{
|
|
|
|
*(u32 *)data = val;
|
|
|
|
intel_pstate_reset_all_pid();
|
|
|
|
return 0;
|
|
|
|
}
|
2014-07-18 09:37:19 -06:00
|
|
|
|
2013-02-06 10:02:13 -07:00
|
|
|
static int pid_param_get(void *data, u64 *val)
|
|
|
|
{
|
|
|
|
*val = *(u32 *)data;
|
|
|
|
return 0;
|
|
|
|
}
|
2014-07-18 09:37:20 -06:00
|
|
|
DEFINE_SIMPLE_ATTRIBUTE(fops_pid_param, pid_param_get, pid_param_set, "%llu\n");
|
2013-02-06 10:02:13 -07:00
|
|
|
|
|
|
|
struct pid_param {
|
|
|
|
char *name;
|
|
|
|
void *value;
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct pid_param pid_files[] = {
|
2013-10-21 10:20:34 -06:00
|
|
|
{"sample_rate_ms", &pid_params.sample_rate_ms},
|
|
|
|
{"d_gain_pct", &pid_params.d_gain_pct},
|
|
|
|
{"i_gain_pct", &pid_params.i_gain_pct},
|
|
|
|
{"deadband", &pid_params.deadband},
|
|
|
|
{"setpoint", &pid_params.setpoint},
|
|
|
|
{"p_gain_pct", &pid_params.p_gain_pct},
|
2013-02-06 10:02:13 -07:00
|
|
|
{NULL, NULL}
|
|
|
|
};
|
|
|
|
|
2014-07-18 09:37:17 -06:00
|
|
|
static void __init intel_pstate_debug_expose_params(void)
|
2013-02-06 10:02:13 -07:00
|
|
|
{
|
2014-07-18 09:37:17 -06:00
|
|
|
struct dentry *debugfs_parent;
|
2013-02-06 10:02:13 -07:00
|
|
|
int i = 0;
|
|
|
|
|
2014-11-06 10:40:47 -07:00
|
|
|
if (hwp_active)
|
|
|
|
return;
|
2013-02-06 10:02:13 -07:00
|
|
|
debugfs_parent = debugfs_create_dir("pstate_snb", NULL);
|
|
|
|
if (IS_ERR_OR_NULL(debugfs_parent))
|
|
|
|
return;
|
|
|
|
while (pid_files[i].name) {
|
|
|
|
debugfs_create_file(pid_files[i].name, 0660,
|
2014-07-18 09:37:23 -06:00
|
|
|
debugfs_parent, pid_files[i].value,
|
|
|
|
&fops_pid_param);
|
2013-02-06 10:02:13 -07:00
|
|
|
i++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/************************** debugfs end ************************/
|
|
|
|
|
|
|
|
/************************** sysfs begin ************************/
|
|
|
|
#define show_one(file_name, object) \
|
|
|
|
static ssize_t show_##file_name \
|
|
|
|
(struct kobject *kobj, struct attribute *attr, char *buf) \
|
|
|
|
{ \
|
|
|
|
return sprintf(buf, "%u\n", limits.object); \
|
|
|
|
}
|
|
|
|
|
2015-01-28 16:03:27 -07:00
|
|
|
static ssize_t show_turbo_pct(struct kobject *kobj,
|
|
|
|
struct attribute *attr, char *buf)
|
|
|
|
{
|
|
|
|
struct cpudata *cpu;
|
|
|
|
int total, no_turbo, turbo_pct;
|
|
|
|
uint32_t turbo_fp;
|
|
|
|
|
|
|
|
cpu = all_cpu_data[0];
|
|
|
|
|
|
|
|
total = cpu->pstate.turbo_pstate - cpu->pstate.min_pstate + 1;
|
|
|
|
no_turbo = cpu->pstate.max_pstate - cpu->pstate.min_pstate + 1;
|
|
|
|
turbo_fp = div_fp(int_tofp(no_turbo), int_tofp(total));
|
|
|
|
turbo_pct = 100 - fp_toint(mul_fp(turbo_fp, int_tofp(100)));
|
|
|
|
return sprintf(buf, "%u\n", turbo_pct);
|
|
|
|
}
|
|
|
|
|
2015-01-28 16:03:28 -07:00
|
|
|
static ssize_t show_num_pstates(struct kobject *kobj,
|
|
|
|
struct attribute *attr, char *buf)
|
|
|
|
{
|
|
|
|
struct cpudata *cpu;
|
|
|
|
int total;
|
|
|
|
|
|
|
|
cpu = all_cpu_data[0];
|
|
|
|
total = cpu->pstate.turbo_pstate - cpu->pstate.min_pstate + 1;
|
|
|
|
return sprintf(buf, "%u\n", total);
|
|
|
|
}
|
|
|
|
|
2014-10-13 09:37:41 -06:00
|
|
|
static ssize_t show_no_turbo(struct kobject *kobj,
|
|
|
|
struct attribute *attr, char *buf)
|
|
|
|
{
|
|
|
|
ssize_t ret;
|
|
|
|
|
|
|
|
update_turbo_state();
|
|
|
|
if (limits.turbo_disabled)
|
|
|
|
ret = sprintf(buf, "%u\n", limits.turbo_disabled);
|
|
|
|
else
|
|
|
|
ret = sprintf(buf, "%u\n", limits.no_turbo);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2013-02-06 10:02:13 -07:00
|
|
|
static ssize_t store_no_turbo(struct kobject *a, struct attribute *b,
|
2014-07-18 09:37:23 -06:00
|
|
|
const char *buf, size_t count)
|
2013-02-06 10:02:13 -07:00
|
|
|
{
|
|
|
|
unsigned int input;
|
|
|
|
int ret;
|
2014-07-18 09:37:19 -06:00
|
|
|
|
2013-02-06 10:02:13 -07:00
|
|
|
ret = sscanf(buf, "%u", &input);
|
|
|
|
if (ret != 1)
|
|
|
|
return -EINVAL;
|
2014-10-13 09:37:41 -06:00
|
|
|
|
|
|
|
update_turbo_state();
|
2014-06-20 08:27:59 -06:00
|
|
|
if (limits.turbo_disabled) {
|
|
|
|
pr_warn("Turbo disabled by BIOS or unavailable on processor\n");
|
2014-10-13 09:37:41 -06:00
|
|
|
return -EPERM;
|
2014-06-20 08:27:59 -06:00
|
|
|
}
|
2014-11-06 10:40:47 -07:00
|
|
|
|
2014-10-13 09:37:41 -06:00
|
|
|
limits.no_turbo = clamp_t(int, input, 0, 1);
|
|
|
|
|
2014-11-06 10:40:47 -07:00
|
|
|
if (hwp_active)
|
|
|
|
intel_pstate_hwp_set();
|
|
|
|
|
2013-02-06 10:02:13 -07:00
|
|
|
return count;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t store_max_perf_pct(struct kobject *a, struct attribute *b,
|
2014-07-18 09:37:23 -06:00
|
|
|
const char *buf, size_t count)
|
2013-02-06 10:02:13 -07:00
|
|
|
{
|
|
|
|
unsigned int input;
|
|
|
|
int ret;
|
2014-07-18 09:37:19 -06:00
|
|
|
|
2013-02-06 10:02:13 -07:00
|
|
|
ret = sscanf(buf, "%u", &input);
|
|
|
|
if (ret != 1)
|
|
|
|
return -EINVAL;
|
|
|
|
|
2013-05-07 09:20:26 -06:00
|
|
|
limits.max_sysfs_pct = clamp_t(int, input, 0 , 100);
|
|
|
|
limits.max_perf_pct = min(limits.max_policy_pct, limits.max_sysfs_pct);
|
2013-02-06 10:02:13 -07:00
|
|
|
limits.max_perf = div_fp(int_tofp(limits.max_perf_pct), int_tofp(100));
|
2014-07-18 09:37:19 -06:00
|
|
|
|
2014-11-06 10:40:47 -07:00
|
|
|
if (hwp_active)
|
|
|
|
intel_pstate_hwp_set();
|
2013-02-06 10:02:13 -07:00
|
|
|
return count;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t store_min_perf_pct(struct kobject *a, struct attribute *b,
|
2014-07-18 09:37:23 -06:00
|
|
|
const char *buf, size_t count)
|
2013-02-06 10:02:13 -07:00
|
|
|
{
|
|
|
|
unsigned int input;
|
|
|
|
int ret;
|
2014-07-18 09:37:19 -06:00
|
|
|
|
2013-02-06 10:02:13 -07:00
|
|
|
ret = sscanf(buf, "%u", &input);
|
|
|
|
if (ret != 1)
|
|
|
|
return -EINVAL;
|
2015-01-29 14:03:52 -07:00
|
|
|
|
|
|
|
limits.min_sysfs_pct = clamp_t(int, input, 0 , 100);
|
|
|
|
limits.min_perf_pct = max(limits.min_policy_pct, limits.min_sysfs_pct);
|
2013-02-06 10:02:13 -07:00
|
|
|
limits.min_perf = div_fp(int_tofp(limits.min_perf_pct), int_tofp(100));
|
|
|
|
|
2014-11-06 10:40:47 -07:00
|
|
|
if (hwp_active)
|
|
|
|
intel_pstate_hwp_set();
|
2013-02-06 10:02:13 -07:00
|
|
|
return count;
|
|
|
|
}
|
|
|
|
|
|
|
|
show_one(max_perf_pct, max_perf_pct);
|
|
|
|
show_one(min_perf_pct, min_perf_pct);
|
|
|
|
|
|
|
|
define_one_global_rw(no_turbo);
|
|
|
|
define_one_global_rw(max_perf_pct);
|
|
|
|
define_one_global_rw(min_perf_pct);
|
2015-01-28 16:03:27 -07:00
|
|
|
define_one_global_ro(turbo_pct);
|
2015-01-28 16:03:28 -07:00
|
|
|
define_one_global_ro(num_pstates);
|
2013-02-06 10:02:13 -07:00
|
|
|
|
|
|
|
static struct attribute *intel_pstate_attributes[] = {
|
|
|
|
&no_turbo.attr,
|
|
|
|
&max_perf_pct.attr,
|
|
|
|
&min_perf_pct.attr,
|
2015-01-28 16:03:27 -07:00
|
|
|
&turbo_pct.attr,
|
2015-01-28 16:03:28 -07:00
|
|
|
&num_pstates.attr,
|
2013-02-06 10:02:13 -07:00
|
|
|
NULL
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct attribute_group intel_pstate_attr_group = {
|
|
|
|
.attrs = intel_pstate_attributes,
|
|
|
|
};
|
|
|
|
|
2014-07-18 09:37:17 -06:00
|
|
|
static void __init intel_pstate_sysfs_expose_params(void)
|
2013-02-06 10:02:13 -07:00
|
|
|
{
|
2014-07-18 09:37:17 -06:00
|
|
|
struct kobject *intel_pstate_kobject;
|
2013-02-06 10:02:13 -07:00
|
|
|
int rc;
|
|
|
|
|
|
|
|
intel_pstate_kobject = kobject_create_and_add("intel_pstate",
|
|
|
|
&cpu_subsys.dev_root->kobj);
|
|
|
|
BUG_ON(!intel_pstate_kobject);
|
2014-07-18 09:37:20 -06:00
|
|
|
rc = sysfs_create_group(intel_pstate_kobject, &intel_pstate_attr_group);
|
2013-02-06 10:02:13 -07:00
|
|
|
BUG_ON(rc);
|
|
|
|
}
|
|
|
|
/************************** sysfs end ************************/
|
2014-11-06 10:40:47 -07:00
|
|
|
|
|
|
|
static void intel_pstate_hwp_enable(void)
|
|
|
|
{
|
|
|
|
hwp_active++;
|
|
|
|
pr_info("intel_pstate HWP enabled\n");
|
|
|
|
|
|
|
|
wrmsrl( MSR_PM_ENABLE, 0x1);
|
|
|
|
}
|
|
|
|
|
2013-10-21 10:20:35 -06:00
|
|
|
static int byt_get_min_pstate(void)
|
|
|
|
{
|
|
|
|
u64 value;
|
2014-07-18 09:37:19 -06:00
|
|
|
|
2013-10-21 10:20:35 -06:00
|
|
|
rdmsrl(BYT_RATIOS, value);
|
2014-06-20 08:27:58 -06:00
|
|
|
return (value >> 8) & 0x7F;
|
2013-10-21 10:20:35 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
static int byt_get_max_pstate(void)
|
|
|
|
{
|
|
|
|
u64 value;
|
2014-07-18 09:37:19 -06:00
|
|
|
|
2013-10-21 10:20:35 -06:00
|
|
|
rdmsrl(BYT_RATIOS, value);
|
2014-06-20 08:27:58 -06:00
|
|
|
return (value >> 16) & 0x7F;
|
2013-10-21 10:20:35 -06:00
|
|
|
}
|
2013-02-06 10:02:13 -07:00
|
|
|
|
2014-02-12 11:01:07 -07:00
|
|
|
static int byt_get_turbo_pstate(void)
|
|
|
|
{
|
|
|
|
u64 value;
|
2014-07-18 09:37:19 -06:00
|
|
|
|
2014-02-12 11:01:07 -07:00
|
|
|
rdmsrl(BYT_TURBO_RATIOS, value);
|
2014-06-20 08:27:58 -06:00
|
|
|
return value & 0x7F;
|
2014-02-12 11:01:07 -07:00
|
|
|
}
|
|
|
|
|
2013-12-18 11:32:39 -07:00
|
|
|
static void byt_set_pstate(struct cpudata *cpudata, int pstate)
|
|
|
|
{
|
|
|
|
u64 val;
|
|
|
|
int32_t vid_fp;
|
|
|
|
u32 vid;
|
|
|
|
|
|
|
|
val = pstate << 8;
|
2014-06-20 08:27:59 -06:00
|
|
|
if (limits.no_turbo && !limits.turbo_disabled)
|
2013-12-18 11:32:39 -07:00
|
|
|
val |= (u64)1 << 32;
|
|
|
|
|
|
|
|
vid_fp = cpudata->vid.min + mul_fp(
|
|
|
|
int_tofp(pstate - cpudata->pstate.min_pstate),
|
|
|
|
cpudata->vid.ratio);
|
|
|
|
|
|
|
|
vid_fp = clamp_t(int32_t, vid_fp, cpudata->vid.min, cpudata->vid.max);
|
2014-10-13 09:37:44 -06:00
|
|
|
vid = ceiling_fp(vid_fp);
|
2013-12-18 11:32:39 -07:00
|
|
|
|
2014-05-08 13:57:23 -06:00
|
|
|
if (pstate > cpudata->pstate.max_pstate)
|
|
|
|
vid = cpudata->vid.turbo;
|
|
|
|
|
2013-12-18 11:32:39 -07:00
|
|
|
val |= vid;
|
|
|
|
|
|
|
|
wrmsrl(MSR_IA32_PERF_CTL, val);
|
|
|
|
}
|
|
|
|
|
2014-10-13 09:37:43 -06:00
|
|
|
#define BYT_BCLK_FREQS 5
|
|
|
|
static int byt_freq_table[BYT_BCLK_FREQS] = { 833, 1000, 1333, 1167, 800};
|
|
|
|
|
|
|
|
static int byt_get_scaling(void)
|
|
|
|
{
|
|
|
|
u64 value;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
rdmsrl(MSR_FSB_FREQ, value);
|
|
|
|
i = value & 0x3;
|
|
|
|
|
|
|
|
BUG_ON(i > BYT_BCLK_FREQS);
|
|
|
|
|
|
|
|
return byt_freq_table[i] * 100;
|
|
|
|
}
|
|
|
|
|
2013-12-18 11:32:39 -07:00
|
|
|
static void byt_get_vid(struct cpudata *cpudata)
|
|
|
|
{
|
|
|
|
u64 value;
|
|
|
|
|
|
|
|
rdmsrl(BYT_VIDS, value);
|
2014-06-20 08:27:58 -06:00
|
|
|
cpudata->vid.min = int_tofp((value >> 8) & 0x7f);
|
|
|
|
cpudata->vid.max = int_tofp((value >> 16) & 0x7f);
|
2013-12-18 11:32:39 -07:00
|
|
|
cpudata->vid.ratio = div_fp(
|
|
|
|
cpudata->vid.max - cpudata->vid.min,
|
|
|
|
int_tofp(cpudata->pstate.max_pstate -
|
|
|
|
cpudata->pstate.min_pstate));
|
2014-05-08 13:57:23 -06:00
|
|
|
|
|
|
|
rdmsrl(BYT_TURBO_VIDS, value);
|
|
|
|
cpudata->vid.turbo = value & 0x7f;
|
2013-12-18 11:32:39 -07:00
|
|
|
}
|
|
|
|
|
2013-10-21 10:20:34 -06:00
|
|
|
static int core_get_min_pstate(void)
|
2013-02-06 10:02:13 -07:00
|
|
|
{
|
|
|
|
u64 value;
|
2014-07-18 09:37:19 -06:00
|
|
|
|
2013-03-20 08:21:10 -06:00
|
|
|
rdmsrl(MSR_PLATFORM_INFO, value);
|
2013-02-06 10:02:13 -07:00
|
|
|
return (value >> 40) & 0xFF;
|
|
|
|
}
|
|
|
|
|
2013-10-21 10:20:34 -06:00
|
|
|
static int core_get_max_pstate(void)
|
2013-02-06 10:02:13 -07:00
|
|
|
{
|
|
|
|
u64 value;
|
2014-07-18 09:37:19 -06:00
|
|
|
|
2013-03-20 08:21:10 -06:00
|
|
|
rdmsrl(MSR_PLATFORM_INFO, value);
|
2013-02-06 10:02:13 -07:00
|
|
|
return (value >> 8) & 0xFF;
|
|
|
|
}
|
|
|
|
|
2013-10-21 10:20:34 -06:00
|
|
|
static int core_get_turbo_pstate(void)
|
2013-02-06 10:02:13 -07:00
|
|
|
{
|
|
|
|
u64 value;
|
|
|
|
int nont, ret;
|
2014-07-18 09:37:19 -06:00
|
|
|
|
2013-03-20 08:21:10 -06:00
|
|
|
rdmsrl(MSR_NHM_TURBO_RATIO_LIMIT, value);
|
2013-10-21 10:20:34 -06:00
|
|
|
nont = core_get_max_pstate();
|
2014-07-18 09:37:21 -06:00
|
|
|
ret = (value) & 255;
|
2013-02-06 10:02:13 -07:00
|
|
|
if (ret <= nont)
|
|
|
|
ret = nont;
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2014-10-13 09:37:43 -06:00
|
|
|
static inline int core_get_scaling(void)
|
|
|
|
{
|
|
|
|
return 100000;
|
|
|
|
}
|
|
|
|
|
2013-12-18 11:32:39 -07:00
|
|
|
static void core_set_pstate(struct cpudata *cpudata, int pstate)
|
2013-10-21 10:20:34 -06:00
|
|
|
{
|
|
|
|
u64 val;
|
|
|
|
|
|
|
|
val = pstate << 8;
|
2014-06-20 08:27:59 -06:00
|
|
|
if (limits.no_turbo && !limits.turbo_disabled)
|
2013-10-21 10:20:34 -06:00
|
|
|
val |= (u64)1 << 32;
|
|
|
|
|
2014-03-19 09:45:54 -06:00
|
|
|
wrmsrl_on_cpu(cpudata->cpu, MSR_IA32_PERF_CTL, val);
|
2013-10-21 10:20:34 -06:00
|
|
|
}
|
|
|
|
|
2015-04-10 11:22:18 -06:00
|
|
|
static int knl_get_turbo_pstate(void)
|
|
|
|
{
|
|
|
|
u64 value;
|
|
|
|
int nont, ret;
|
|
|
|
|
|
|
|
rdmsrl(MSR_NHM_TURBO_RATIO_LIMIT, value);
|
|
|
|
nont = core_get_max_pstate();
|
|
|
|
ret = (((value) >> 8) & 0xFF);
|
|
|
|
if (ret <= nont)
|
|
|
|
ret = nont;
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2013-10-21 10:20:34 -06:00
|
|
|
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_min = core_get_min_pstate,
|
|
|
|
.get_turbo = core_get_turbo_pstate,
|
2014-10-13 09:37:43 -06:00
|
|
|
.get_scaling = core_get_scaling,
|
2013-10-21 10:20:34 -06:00
|
|
|
.set = core_set_pstate,
|
|
|
|
},
|
|
|
|
};
|
|
|
|
|
2013-10-21 10:20:35 -06:00
|
|
|
static struct cpu_defaults byt_params = {
|
|
|
|
.pid_policy = {
|
|
|
|
.sample_rate_ms = 10,
|
|
|
|
.deadband = 0,
|
2015-04-10 12:06:43 -06:00
|
|
|
.setpoint = 60,
|
2013-10-21 10:20:35 -06:00
|
|
|
.p_gain_pct = 14,
|
|
|
|
.d_gain_pct = 0,
|
|
|
|
.i_gain_pct = 4,
|
|
|
|
},
|
|
|
|
.funcs = {
|
|
|
|
.get_max = byt_get_max_pstate,
|
|
|
|
.get_min = byt_get_min_pstate,
|
2014-02-12 11:01:07 -07:00
|
|
|
.get_turbo = byt_get_turbo_pstate,
|
2013-12-18 11:32:39 -07:00
|
|
|
.set = byt_set_pstate,
|
2014-10-13 09:37:43 -06:00
|
|
|
.get_scaling = byt_get_scaling,
|
2013-12-18 11:32:39 -07:00
|
|
|
.get_vid = byt_get_vid,
|
2013-10-21 10:20:35 -06:00
|
|
|
},
|
|
|
|
};
|
|
|
|
|
2015-04-10 11:22:18 -06:00
|
|
|
static 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_min = core_get_min_pstate,
|
|
|
|
.get_turbo = knl_get_turbo_pstate,
|
|
|
|
.set = core_set_pstate,
|
|
|
|
},
|
|
|
|
};
|
|
|
|
|
2013-02-06 10:02:13 -07:00
|
|
|
static void intel_pstate_get_min_max(struct cpudata *cpu, int *min, int *max)
|
|
|
|
{
|
|
|
|
int max_perf = cpu->pstate.turbo_pstate;
|
2013-10-21 10:20:33 -06:00
|
|
|
int max_perf_adj;
|
2013-02-06 10:02:13 -07:00
|
|
|
int min_perf;
|
2014-07-18 09:37:19 -06:00
|
|
|
|
2014-10-13 09:37:41 -06:00
|
|
|
if (limits.no_turbo || limits.turbo_disabled)
|
2013-02-06 10:02:13 -07:00
|
|
|
max_perf = cpu->pstate.max_pstate;
|
|
|
|
|
2014-12-10 13:39:38 -07:00
|
|
|
/*
|
|
|
|
* performance can be limited by user through sysfs, by cpufreq
|
|
|
|
* policy, or by cpu specific default values determined through
|
|
|
|
* experimentation.
|
|
|
|
*/
|
2013-10-21 10:20:33 -06:00
|
|
|
max_perf_adj = fp_toint(mul_fp(int_tofp(max_perf), limits.max_perf));
|
|
|
|
*max = clamp_t(int, max_perf_adj,
|
2013-02-06 10:02:13 -07:00
|
|
|
cpu->pstate.min_pstate, cpu->pstate.turbo_pstate);
|
|
|
|
|
|
|
|
min_perf = fp_toint(mul_fp(int_tofp(max_perf), limits.min_perf));
|
2014-07-18 09:37:20 -06:00
|
|
|
*min = clamp_t(int, min_perf, cpu->pstate.min_pstate, max_perf);
|
2013-02-06 10:02:13 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static void intel_pstate_set_pstate(struct cpudata *cpu, int pstate)
|
|
|
|
{
|
|
|
|
int max_perf, min_perf;
|
|
|
|
|
2014-10-13 09:37:41 -06:00
|
|
|
update_turbo_state();
|
|
|
|
|
2013-02-06 10:02:13 -07:00
|
|
|
intel_pstate_get_min_max(cpu, &min_perf, &max_perf);
|
|
|
|
|
|
|
|
pstate = clamp_t(int, pstate, min_perf, max_perf);
|
|
|
|
|
|
|
|
if (pstate == cpu->pstate.current_pstate)
|
|
|
|
return;
|
|
|
|
|
2014-10-13 09:37:43 -06:00
|
|
|
trace_cpu_frequency(pstate * cpu->pstate.scaling, cpu->cpu);
|
2013-05-07 09:20:30 -06:00
|
|
|
|
2013-02-06 10:02:13 -07:00
|
|
|
cpu->pstate.current_pstate = pstate;
|
|
|
|
|
2013-12-18 11:32:39 -07:00
|
|
|
pstate_funcs.set(cpu, pstate);
|
2013-02-06 10:02:13 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static void intel_pstate_get_cpu_pstates(struct cpudata *cpu)
|
|
|
|
{
|
2013-10-21 10:20:34 -06:00
|
|
|
cpu->pstate.min_pstate = pstate_funcs.get_min();
|
|
|
|
cpu->pstate.max_pstate = pstate_funcs.get_max();
|
|
|
|
cpu->pstate.turbo_pstate = pstate_funcs.get_turbo();
|
2014-10-13 09:37:43 -06:00
|
|
|
cpu->pstate.scaling = pstate_funcs.get_scaling();
|
2013-02-06 10:02:13 -07:00
|
|
|
|
2013-12-18 11:32:39 -07:00
|
|
|
if (pstate_funcs.get_vid)
|
|
|
|
pstate_funcs.get_vid(cpu);
|
2014-05-08 13:57:24 -06:00
|
|
|
intel_pstate_set_pstate(cpu, cpu->pstate.min_pstate);
|
2013-02-06 10:02:13 -07:00
|
|
|
}
|
|
|
|
|
2014-04-29 11:53:49 -06:00
|
|
|
static inline void intel_pstate_calc_busy(struct cpudata *cpu)
|
2013-02-06 10:02:13 -07:00
|
|
|
{
|
2014-04-29 11:53:49 -06:00
|
|
|
struct sample *sample = &cpu->sample;
|
2014-05-30 11:10:57 -06:00
|
|
|
int64_t core_pct;
|
2013-02-06 10:02:13 -07:00
|
|
|
|
2014-05-30 11:10:57 -06:00
|
|
|
core_pct = int_tofp(sample->aperf) * int_tofp(100);
|
2014-07-18 09:37:27 -06:00
|
|
|
core_pct = div64_u64(core_pct, int_tofp(sample->mperf));
|
2014-02-25 11:35:37 -07:00
|
|
|
|
2014-02-03 09:55:31 -07:00
|
|
|
sample->freq = fp_toint(
|
2014-10-13 09:37:43 -06:00
|
|
|
mul_fp(int_tofp(
|
|
|
|
cpu->pstate.max_pstate * cpu->pstate.scaling / 100),
|
|
|
|
core_pct));
|
2014-02-03 09:55:31 -07:00
|
|
|
|
2014-05-30 11:10:57 -06:00
|
|
|
sample->core_pct_busy = (int32_t)core_pct;
|
2013-02-06 10:02:13 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static inline void intel_pstate_sample(struct cpudata *cpu)
|
|
|
|
{
|
|
|
|
u64 aperf, mperf;
|
2014-07-18 09:37:24 -06:00
|
|
|
unsigned long flags;
|
2015-04-11 22:10:26 -06:00
|
|
|
u64 tsc;
|
2013-02-06 10:02:13 -07:00
|
|
|
|
2014-07-18 09:37:24 -06:00
|
|
|
local_irq_save(flags);
|
2013-02-06 10:02:13 -07:00
|
|
|
rdmsrl(MSR_IA32_APERF, aperf);
|
|
|
|
rdmsrl(MSR_IA32_MPERF, mperf);
|
2015-04-11 22:10:26 -06:00
|
|
|
tsc = native_read_tsc();
|
2014-07-18 09:37:24 -06:00
|
|
|
local_irq_restore(flags);
|
2014-01-16 11:32:25 -07:00
|
|
|
|
2014-05-29 10:32:24 -06:00
|
|
|
cpu->last_sample_time = cpu->sample.time;
|
|
|
|
cpu->sample.time = ktime_get();
|
2014-02-12 11:01:04 -07:00
|
|
|
cpu->sample.aperf = aperf;
|
|
|
|
cpu->sample.mperf = mperf;
|
2015-04-11 22:10:26 -06:00
|
|
|
cpu->sample.tsc = tsc;
|
2014-02-12 11:01:04 -07:00
|
|
|
cpu->sample.aperf -= cpu->prev_aperf;
|
|
|
|
cpu->sample.mperf -= cpu->prev_mperf;
|
2015-04-11 22:10:26 -06:00
|
|
|
cpu->sample.tsc -= cpu->prev_tsc;
|
2013-05-07 09:20:25 -06:00
|
|
|
|
2014-04-29 11:53:49 -06:00
|
|
|
intel_pstate_calc_busy(cpu);
|
2013-02-06 10:02:13 -07:00
|
|
|
|
|
|
|
cpu->prev_aperf = aperf;
|
|
|
|
cpu->prev_mperf = mperf;
|
2015-04-11 22:10:26 -06:00
|
|
|
cpu->prev_tsc = tsc;
|
2013-02-06 10:02:13 -07:00
|
|
|
}
|
|
|
|
|
2014-11-06 10:40:47 -07:00
|
|
|
static inline void intel_hwp_set_sample_time(struct cpudata *cpu)
|
|
|
|
{
|
|
|
|
int delay;
|
|
|
|
|
|
|
|
delay = msecs_to_jiffies(50);
|
|
|
|
mod_timer_pinned(&cpu->timer, jiffies + delay);
|
|
|
|
}
|
|
|
|
|
2013-02-06 10:02:13 -07:00
|
|
|
static inline void intel_pstate_set_sample_time(struct cpudata *cpu)
|
|
|
|
{
|
2014-07-18 09:37:22 -06:00
|
|
|
int delay;
|
2013-02-06 10:02:13 -07:00
|
|
|
|
2014-07-18 09:37:22 -06:00
|
|
|
delay = msecs_to_jiffies(pid_params.sample_rate_ms);
|
2013-02-06 10:02:13 -07:00
|
|
|
mod_timer_pinned(&cpu->timer, jiffies + delay);
|
|
|
|
}
|
|
|
|
|
2013-10-21 10:20:32 -06:00
|
|
|
static inline int32_t intel_pstate_get_scaled_busy(struct cpudata *cpu)
|
2013-02-06 10:02:13 -07:00
|
|
|
{
|
2014-05-29 10:32:24 -06:00
|
|
|
int32_t core_busy, max_pstate, current_pstate, sample_ratio;
|
|
|
|
u32 duration_us;
|
|
|
|
u32 sample_time;
|
2013-02-06 10:02:13 -07:00
|
|
|
|
2014-12-10 13:39:38 -07:00
|
|
|
/*
|
|
|
|
* core_busy is the ratio of actual performance to max
|
|
|
|
* max_pstate is the max non turbo pstate available
|
|
|
|
* current_pstate was the pstate that was requested during
|
|
|
|
* the last sample period.
|
|
|
|
*
|
|
|
|
* We normalize core_busy, which was our actual percent
|
|
|
|
* performance to what we requested during the last sample
|
|
|
|
* period. The result will be a percentage of busy at a
|
|
|
|
* specified pstate.
|
|
|
|
*/
|
2014-02-12 11:01:04 -07:00
|
|
|
core_busy = cpu->sample.core_pct_busy;
|
2013-07-18 09:48:42 -06:00
|
|
|
max_pstate = int_tofp(cpu->pstate.max_pstate);
|
2013-02-06 10:02:13 -07:00
|
|
|
current_pstate = int_tofp(cpu->pstate.current_pstate);
|
2014-02-25 11:35:37 -07:00
|
|
|
core_busy = mul_fp(core_busy, div_fp(max_pstate, current_pstate));
|
2014-05-29 10:32:24 -06:00
|
|
|
|
2014-12-10 13:39:38 -07:00
|
|
|
/*
|
|
|
|
* Since we have a deferred timer, it will not fire unless
|
|
|
|
* we are in C0. So, determine if the actual elapsed time
|
|
|
|
* is significantly greater (3x) than our sample interval. If it
|
|
|
|
* is, then we were idle for a long enough period of time
|
|
|
|
* to adjust our busyness.
|
|
|
|
*/
|
2014-07-18 09:37:21 -06:00
|
|
|
sample_time = pid_params.sample_rate_ms * USEC_PER_MSEC;
|
2014-05-29 10:32:24 -06:00
|
|
|
duration_us = (u32) ktime_us_delta(cpu->sample.time,
|
2014-07-18 09:37:23 -06:00
|
|
|
cpu->last_sample_time);
|
2014-05-29 10:32:24 -06:00
|
|
|
if (duration_us > sample_time * 3) {
|
|
|
|
sample_ratio = div_fp(int_tofp(sample_time),
|
2014-07-18 09:37:23 -06:00
|
|
|
int_tofp(duration_us));
|
2014-05-29 10:32:24 -06:00
|
|
|
core_busy = mul_fp(core_busy, sample_ratio);
|
|
|
|
}
|
|
|
|
|
2014-05-29 10:32:23 -06:00
|
|
|
return core_busy;
|
2013-02-06 10:02:13 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static inline void intel_pstate_adjust_busy_pstate(struct cpudata *cpu)
|
|
|
|
{
|
2013-10-21 10:20:32 -06:00
|
|
|
int32_t busy_scaled;
|
2013-02-06 10:02:13 -07:00
|
|
|
struct _pid *pid;
|
2014-07-18 09:37:26 -06:00
|
|
|
signed int ctl;
|
2015-04-11 22:10:26 -06:00
|
|
|
int from;
|
|
|
|
struct sample *sample;
|
|
|
|
|
|
|
|
from = cpu->pstate.current_pstate;
|
2013-02-06 10:02:13 -07:00
|
|
|
|
|
|
|
pid = &cpu->pid;
|
|
|
|
busy_scaled = intel_pstate_get_scaled_busy(cpu);
|
|
|
|
|
|
|
|
ctl = pid_calc(pid, busy_scaled);
|
|
|
|
|
2014-07-18 09:37:26 -06:00
|
|
|
/* Negative values of ctl increase the pstate and vice versa */
|
|
|
|
intel_pstate_set_pstate(cpu, cpu->pstate.current_pstate - ctl);
|
2015-04-11 22:10:26 -06:00
|
|
|
|
|
|
|
sample = &cpu->sample;
|
|
|
|
trace_pstate_sample(fp_toint(sample->core_pct_busy),
|
|
|
|
fp_toint(busy_scaled),
|
|
|
|
from,
|
|
|
|
cpu->pstate.current_pstate,
|
|
|
|
sample->mperf,
|
|
|
|
sample->aperf,
|
|
|
|
sample->tsc,
|
|
|
|
sample->freq);
|
2013-02-06 10:02:13 -07:00
|
|
|
}
|
|
|
|
|
2014-11-06 10:40:47 -07:00
|
|
|
static void intel_hwp_timer_func(unsigned long __data)
|
|
|
|
{
|
|
|
|
struct cpudata *cpu = (struct cpudata *) __data;
|
|
|
|
|
|
|
|
intel_pstate_sample(cpu);
|
|
|
|
intel_hwp_set_sample_time(cpu);
|
|
|
|
}
|
|
|
|
|
2013-02-06 10:02:13 -07:00
|
|
|
static void intel_pstate_timer_func(unsigned long __data)
|
|
|
|
{
|
|
|
|
struct cpudata *cpu = (struct cpudata *) __data;
|
|
|
|
|
|
|
|
intel_pstate_sample(cpu);
|
2014-01-16 11:32:25 -07:00
|
|
|
|
2013-05-07 09:20:27 -06:00
|
|
|
intel_pstate_adjust_busy_pstate(cpu);
|
2014-01-16 11:32:25 -07:00
|
|
|
|
2013-02-06 10:02:13 -07:00
|
|
|
intel_pstate_set_sample_time(cpu);
|
|
|
|
}
|
|
|
|
|
|
|
|
#define ICPU(model, policy) \
|
2014-01-06 11:59:16 -07:00
|
|
|
{ X86_VENDOR_INTEL, 6, model, X86_FEATURE_APERFMPERF,\
|
|
|
|
(unsigned long)&policy }
|
2013-02-06 10:02:13 -07:00
|
|
|
|
|
|
|
static const struct x86_cpu_id intel_pstate_cpu_ids[] = {
|
2013-10-21 10:20:34 -06:00
|
|
|
ICPU(0x2a, core_params),
|
|
|
|
ICPU(0x2d, core_params),
|
2013-10-21 10:20:35 -06:00
|
|
|
ICPU(0x37, byt_params),
|
2013-10-21 10:20:34 -06:00
|
|
|
ICPU(0x3a, core_params),
|
|
|
|
ICPU(0x3c, core_params),
|
2014-05-08 13:57:27 -06:00
|
|
|
ICPU(0x3d, core_params),
|
2013-10-21 10:20:34 -06:00
|
|
|
ICPU(0x3e, core_params),
|
|
|
|
ICPU(0x3f, core_params),
|
|
|
|
ICPU(0x45, core_params),
|
|
|
|
ICPU(0x46, core_params),
|
2014-11-06 10:50:45 -07:00
|
|
|
ICPU(0x47, core_params),
|
2014-08-22 04:05:44 -06:00
|
|
|
ICPU(0x4c, byt_params),
|
2015-01-28 14:53:28 -07:00
|
|
|
ICPU(0x4e, core_params),
|
2014-05-08 13:57:27 -06:00
|
|
|
ICPU(0x4f, core_params),
|
|
|
|
ICPU(0x56, core_params),
|
2015-04-10 11:22:18 -06:00
|
|
|
ICPU(0x57, knl_params),
|
2013-02-06 10:02:13 -07:00
|
|
|
{}
|
|
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(x86cpu, intel_pstate_cpu_ids);
|
|
|
|
|
2014-11-06 10:40:47 -07:00
|
|
|
static const struct x86_cpu_id intel_pstate_cpu_oob_ids[] = {
|
|
|
|
ICPU(0x56, core_params),
|
|
|
|
{}
|
|
|
|
};
|
|
|
|
|
2013-02-06 10:02:13 -07:00
|
|
|
static int intel_pstate_init_cpu(unsigned int cpunum)
|
|
|
|
{
|
|
|
|
struct cpudata *cpu;
|
|
|
|
|
2014-10-13 09:37:42 -06:00
|
|
|
if (!all_cpu_data[cpunum])
|
|
|
|
all_cpu_data[cpunum] = kzalloc(sizeof(struct cpudata),
|
|
|
|
GFP_KERNEL);
|
2013-02-06 10:02:13 -07:00
|
|
|
if (!all_cpu_data[cpunum])
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
cpu = all_cpu_data[cpunum];
|
|
|
|
|
|
|
|
cpu->cpu = cpunum;
|
2014-07-04 17:51:33 -06:00
|
|
|
intel_pstate_get_cpu_pstates(cpu);
|
2013-10-21 10:20:34 -06:00
|
|
|
|
2013-02-06 10:02:13 -07:00
|
|
|
init_timer_deferrable(&cpu->timer);
|
2014-07-18 09:37:20 -06:00
|
|
|
cpu->timer.data = (unsigned long)cpu;
|
2013-02-06 10:02:13 -07:00
|
|
|
cpu->timer.expires = jiffies + HZ/100;
|
2014-11-06 10:40:47 -07:00
|
|
|
|
|
|
|
if (!hwp_active)
|
|
|
|
cpu->timer.function = intel_pstate_timer_func;
|
|
|
|
else
|
|
|
|
cpu->timer.function = intel_hwp_timer_func;
|
|
|
|
|
2013-02-06 10:02:13 -07:00
|
|
|
intel_pstate_busy_pid_reset(cpu);
|
|
|
|
intel_pstate_sample(cpu);
|
|
|
|
|
|
|
|
add_timer_on(&cpu->timer, cpunum);
|
|
|
|
|
2014-08-27 11:17:08 -06:00
|
|
|
pr_debug("Intel pstate controlling: cpu %d\n", cpunum);
|
2013-02-06 10:02:13 -07:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static unsigned int intel_pstate_get(unsigned int cpu_num)
|
|
|
|
{
|
|
|
|
struct sample *sample;
|
|
|
|
struct cpudata *cpu;
|
|
|
|
|
|
|
|
cpu = all_cpu_data[cpu_num];
|
|
|
|
if (!cpu)
|
|
|
|
return 0;
|
2014-02-12 11:01:04 -07:00
|
|
|
sample = &cpu->sample;
|
2013-02-06 10:02:13 -07:00
|
|
|
return sample->freq;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int intel_pstate_set_policy(struct cpufreq_policy *policy)
|
|
|
|
{
|
2013-03-05 15:15:26 -07:00
|
|
|
if (!policy->cpuinfo.max_freq)
|
|
|
|
return -ENODEV;
|
|
|
|
|
2015-01-29 13:17:13 -07:00
|
|
|
if (policy->policy == CPUFREQ_POLICY_PERFORMANCE &&
|
|
|
|
policy->max >= policy->cpuinfo.max_freq) {
|
2015-01-29 14:03:52 -07:00
|
|
|
limits.min_policy_pct = 100;
|
2013-02-06 10:02:13 -07:00
|
|
|
limits.min_perf_pct = 100;
|
|
|
|
limits.min_perf = int_tofp(1);
|
2014-10-15 17:16:51 -06:00
|
|
|
limits.max_policy_pct = 100;
|
2013-02-06 10:02:13 -07:00
|
|
|
limits.max_perf_pct = 100;
|
|
|
|
limits.max_perf = int_tofp(1);
|
2014-10-13 09:37:41 -06:00
|
|
|
limits.no_turbo = 0;
|
2013-04-09 16:38:18 -06:00
|
|
|
return 0;
|
2013-02-06 10:02:13 -07:00
|
|
|
}
|
2014-11-06 10:40:47 -07:00
|
|
|
|
2015-01-29 14:03:52 -07:00
|
|
|
limits.min_policy_pct = (policy->min * 100) / policy->cpuinfo.max_freq;
|
|
|
|
limits.min_policy_pct = clamp_t(int, limits.min_policy_pct, 0 , 100);
|
|
|
|
limits.min_perf_pct = max(limits.min_policy_pct, limits.min_sysfs_pct);
|
2013-04-09 16:38:18 -06:00
|
|
|
limits.min_perf = div_fp(int_tofp(limits.min_perf_pct), int_tofp(100));
|
|
|
|
|
2014-07-18 09:37:21 -06:00
|
|
|
limits.max_policy_pct = (policy->max * 100) / policy->cpuinfo.max_freq;
|
2013-05-07 09:20:26 -06:00
|
|
|
limits.max_policy_pct = clamp_t(int, limits.max_policy_pct, 0 , 100);
|
|
|
|
limits.max_perf_pct = min(limits.max_policy_pct, limits.max_sysfs_pct);
|
2013-04-09 16:38:18 -06:00
|
|
|
limits.max_perf = div_fp(int_tofp(limits.max_perf_pct), int_tofp(100));
|
2013-02-06 10:02:13 -07:00
|
|
|
|
2014-11-06 10:40:47 -07:00
|
|
|
if (hwp_active)
|
|
|
|
intel_pstate_hwp_set();
|
|
|
|
|
2013-02-06 10:02:13 -07:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int intel_pstate_verify_policy(struct cpufreq_policy *policy)
|
|
|
|
{
|
2013-10-02 02:43:19 -06:00
|
|
|
cpufreq_verify_within_cpu_limits(policy);
|
2013-02-06 10:02:13 -07:00
|
|
|
|
2014-07-18 09:37:21 -06:00
|
|
|
if (policy->policy != CPUFREQ_POLICY_POWERSAVE &&
|
2014-07-18 09:37:23 -06:00
|
|
|
policy->policy != CPUFREQ_POLICY_PERFORMANCE)
|
2013-02-06 10:02:13 -07:00
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2014-03-19 09:45:54 -06:00
|
|
|
static void intel_pstate_stop_cpu(struct cpufreq_policy *policy)
|
2013-02-06 10:02:13 -07:00
|
|
|
{
|
2014-03-19 09:45:54 -06:00
|
|
|
int cpu_num = policy->cpu;
|
|
|
|
struct cpudata *cpu = all_cpu_data[cpu_num];
|
2013-02-06 10:02:13 -07:00
|
|
|
|
2014-03-19 09:45:54 -06:00
|
|
|
pr_info("intel_pstate CPU %d exiting\n", cpu_num);
|
|
|
|
|
2014-03-24 08:41:29 -06:00
|
|
|
del_timer_sync(&all_cpu_data[cpu_num]->timer);
|
2014-11-06 10:40:47 -07:00
|
|
|
if (hwp_active)
|
|
|
|
return;
|
|
|
|
|
2014-03-19 09:45:54 -06:00
|
|
|
intel_pstate_set_pstate(cpu, cpu->pstate.min_pstate);
|
2013-02-06 10:02:13 -07:00
|
|
|
}
|
|
|
|
|
2013-06-19 11:54:04 -06:00
|
|
|
static int intel_pstate_cpu_init(struct cpufreq_policy *policy)
|
2013-02-06 10:02:13 -07:00
|
|
|
{
|
|
|
|
struct cpudata *cpu;
|
2013-10-15 12:06:14 -06:00
|
|
|
int rc;
|
2013-02-06 10:02:13 -07:00
|
|
|
|
|
|
|
rc = intel_pstate_init_cpu(policy->cpu);
|
|
|
|
if (rc)
|
|
|
|
return rc;
|
|
|
|
|
|
|
|
cpu = all_cpu_data[policy->cpu];
|
|
|
|
|
2014-06-20 08:27:59 -06:00
|
|
|
if (limits.min_perf_pct == 100 && limits.max_perf_pct == 100)
|
2013-02-06 10:02:13 -07:00
|
|
|
policy->policy = CPUFREQ_POLICY_PERFORMANCE;
|
|
|
|
else
|
|
|
|
policy->policy = CPUFREQ_POLICY_POWERSAVE;
|
|
|
|
|
2014-10-13 09:37:43 -06:00
|
|
|
policy->min = cpu->pstate.min_pstate * cpu->pstate.scaling;
|
|
|
|
policy->max = cpu->pstate.turbo_pstate * cpu->pstate.scaling;
|
2013-02-06 10:02:13 -07:00
|
|
|
|
|
|
|
/* cpuinfo and default policy values */
|
2014-10-13 09:37:43 -06:00
|
|
|
policy->cpuinfo.min_freq = cpu->pstate.min_pstate * cpu->pstate.scaling;
|
|
|
|
policy->cpuinfo.max_freq =
|
|
|
|
cpu->pstate.turbo_pstate * cpu->pstate.scaling;
|
2013-02-06 10:02:13 -07:00
|
|
|
policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
|
|
|
|
cpumask_set_cpu(policy->cpu, policy->cpus);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct cpufreq_driver intel_pstate_driver = {
|
|
|
|
.flags = CPUFREQ_CONST_LOOPS,
|
|
|
|
.verify = intel_pstate_verify_policy,
|
|
|
|
.setpolicy = intel_pstate_set_policy,
|
|
|
|
.get = intel_pstate_get,
|
|
|
|
.init = intel_pstate_cpu_init,
|
2014-03-19 09:45:54 -06:00
|
|
|
.stop_cpu = intel_pstate_stop_cpu,
|
2013-02-06 10:02:13 -07:00
|
|
|
.name = "intel_pstate",
|
|
|
|
};
|
|
|
|
|
2013-02-15 14:55:10 -07:00
|
|
|
static int __initdata no_load;
|
2014-11-06 10:40:47 -07:00
|
|
|
static int __initdata no_hwp;
|
2015-02-06 14:41:55 -07:00
|
|
|
static int __initdata hwp_only;
|
2014-12-08 18:43:19 -07:00
|
|
|
static unsigned int force_load;
|
2013-02-15 14:55:10 -07:00
|
|
|
|
2013-03-21 18:29:28 -06:00
|
|
|
static int intel_pstate_msrs_not_valid(void)
|
|
|
|
{
|
2013-10-21 10:20:34 -06:00
|
|
|
if (!pstate_funcs.get_max() ||
|
2014-07-18 09:37:23 -06:00
|
|
|
!pstate_funcs.get_min() ||
|
|
|
|
!pstate_funcs.get_turbo())
|
2013-03-21 18:29:28 -06:00
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
2013-10-21 10:20:34 -06:00
|
|
|
|
2013-10-30 09:38:32 -06:00
|
|
|
static void copy_pid_params(struct pstate_adjust_policy *policy)
|
2013-10-21 10:20:34 -06:00
|
|
|
{
|
|
|
|
pid_params.sample_rate_ms = policy->sample_rate_ms;
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2013-10-30 09:38:32 -06:00
|
|
|
static void copy_cpu_funcs(struct pstate_funcs *funcs)
|
2013-10-21 10:20:34 -06:00
|
|
|
{
|
|
|
|
pstate_funcs.get_max = funcs->get_max;
|
|
|
|
pstate_funcs.get_min = funcs->get_min;
|
|
|
|
pstate_funcs.get_turbo = funcs->get_turbo;
|
2014-10-13 09:37:43 -06:00
|
|
|
pstate_funcs.get_scaling = funcs->get_scaling;
|
2013-10-21 10:20:34 -06:00
|
|
|
pstate_funcs.set = funcs->set;
|
2013-12-18 11:32:39 -07:00
|
|
|
pstate_funcs.get_vid = funcs->get_vid;
|
2013-10-21 10:20:34 -06:00
|
|
|
}
|
|
|
|
|
2013-10-31 09:24:05 -06:00
|
|
|
#if IS_ENABLED(CONFIG_ACPI)
|
|
|
|
#include <acpi/processor.h>
|
|
|
|
|
|
|
|
static bool intel_pstate_no_acpi_pss(void)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for_each_possible_cpu(i) {
|
|
|
|
acpi_status status;
|
|
|
|
union acpi_object *pss;
|
|
|
|
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
|
|
|
|
struct acpi_processor *pr = per_cpu(processors, i);
|
|
|
|
|
|
|
|
if (!pr)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
status = acpi_evaluate_object(pr->handle, "_PSS", NULL, &buffer);
|
|
|
|
if (ACPI_FAILURE(status))
|
|
|
|
continue;
|
|
|
|
|
|
|
|
pss = buffer.pointer;
|
|
|
|
if (pss && pss->type == ACPI_TYPE_PACKAGE) {
|
|
|
|
kfree(pss);
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
kfree(pss);
|
|
|
|
}
|
|
|
|
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
2014-11-30 19:32:08 -07:00
|
|
|
static bool intel_pstate_has_acpi_ppc(void)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for_each_possible_cpu(i) {
|
|
|
|
struct acpi_processor *pr = per_cpu(processors, i);
|
|
|
|
|
|
|
|
if (!pr)
|
|
|
|
continue;
|
|
|
|
if (acpi_has_method(pr->handle, "_PPC"))
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
enum {
|
|
|
|
PSS,
|
|
|
|
PPC,
|
|
|
|
};
|
|
|
|
|
2013-10-31 09:24:05 -06:00
|
|
|
struct hw_vendor_info {
|
|
|
|
u16 valid;
|
|
|
|
char oem_id[ACPI_OEM_ID_SIZE];
|
|
|
|
char oem_table_id[ACPI_OEM_TABLE_ID_SIZE];
|
2014-11-30 19:32:08 -07:00
|
|
|
int oem_pwr_table;
|
2013-10-31 09:24:05 -06:00
|
|
|
};
|
|
|
|
|
|
|
|
/* Hardware vendor-specific info that has its own power management modes */
|
|
|
|
static struct hw_vendor_info vendor_info[] = {
|
2014-11-30 19:32:08 -07:00
|
|
|
{1, "HP ", "ProLiant", PSS},
|
|
|
|
{1, "ORACLE", "X4-2 ", PPC},
|
|
|
|
{1, "ORACLE", "X4-2L ", PPC},
|
|
|
|
{1, "ORACLE", "X4-2B ", PPC},
|
|
|
|
{1, "ORACLE", "X3-2 ", PPC},
|
|
|
|
{1, "ORACLE", "X3-2L ", PPC},
|
|
|
|
{1, "ORACLE", "X3-2B ", PPC},
|
|
|
|
{1, "ORACLE", "X4470M2 ", PPC},
|
|
|
|
{1, "ORACLE", "X4270M3 ", PPC},
|
|
|
|
{1, "ORACLE", "X4270M2 ", PPC},
|
|
|
|
{1, "ORACLE", "X4170M2 ", PPC},
|
2013-10-31 09:24:05 -06:00
|
|
|
{0, "", ""},
|
|
|
|
};
|
|
|
|
|
|
|
|
static bool intel_pstate_platform_pwr_mgmt_exists(void)
|
|
|
|
{
|
|
|
|
struct acpi_table_header hdr;
|
|
|
|
struct hw_vendor_info *v_info;
|
2014-11-06 10:40:47 -07:00
|
|
|
const struct x86_cpu_id *id;
|
|
|
|
u64 misc_pwr;
|
|
|
|
|
|
|
|
id = x86_match_cpu(intel_pstate_cpu_oob_ids);
|
|
|
|
if (id) {
|
|
|
|
rdmsrl(MSR_MISC_PWR_MGMT, misc_pwr);
|
|
|
|
if ( misc_pwr & (1 << 8))
|
|
|
|
return true;
|
|
|
|
}
|
2013-10-31 09:24:05 -06:00
|
|
|
|
2014-07-18 09:37:23 -06:00
|
|
|
if (acpi_disabled ||
|
|
|
|
ACPI_FAILURE(acpi_get_table_header(ACPI_SIG_FADT, 0, &hdr)))
|
2013-10-31 09:24:05 -06:00
|
|
|
return false;
|
|
|
|
|
|
|
|
for (v_info = vendor_info; v_info->valid; v_info++) {
|
2014-07-18 09:37:23 -06:00
|
|
|
if (!strncmp(hdr.oem_id, v_info->oem_id, ACPI_OEM_ID_SIZE) &&
|
2014-11-30 19:32:08 -07:00
|
|
|
!strncmp(hdr.oem_table_id, v_info->oem_table_id,
|
|
|
|
ACPI_OEM_TABLE_ID_SIZE))
|
|
|
|
switch (v_info->oem_pwr_table) {
|
|
|
|
case PSS:
|
|
|
|
return intel_pstate_no_acpi_pss();
|
|
|
|
case PPC:
|
2014-12-08 18:43:19 -07:00
|
|
|
return intel_pstate_has_acpi_ppc() &&
|
|
|
|
(!force_load);
|
2014-11-30 19:32:08 -07:00
|
|
|
}
|
2013-10-31 09:24:05 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
#else /* CONFIG_ACPI not enabled */
|
|
|
|
static inline bool intel_pstate_platform_pwr_mgmt_exists(void) { return false; }
|
2014-11-30 19:32:08 -07:00
|
|
|
static inline bool intel_pstate_has_acpi_ppc(void) { return false; }
|
2013-10-31 09:24:05 -06:00
|
|
|
#endif /* CONFIG_ACPI */
|
|
|
|
|
2013-02-06 10:02:13 -07:00
|
|
|
static int __init intel_pstate_init(void)
|
|
|
|
{
|
2013-03-05 15:15:27 -07:00
|
|
|
int cpu, rc = 0;
|
2013-02-06 10:02:13 -07:00
|
|
|
const struct x86_cpu_id *id;
|
2015-04-03 07:19:53 -06:00
|
|
|
struct cpu_defaults *cpu_def;
|
2013-02-06 10:02:13 -07:00
|
|
|
|
2013-02-15 14:55:10 -07:00
|
|
|
if (no_load)
|
|
|
|
return -ENODEV;
|
|
|
|
|
2013-02-06 10:02:13 -07:00
|
|
|
id = x86_match_cpu(intel_pstate_cpu_ids);
|
|
|
|
if (!id)
|
|
|
|
return -ENODEV;
|
|
|
|
|
2013-10-31 09:24:05 -06:00
|
|
|
/*
|
|
|
|
* The Intel pstate driver will be ignored if the platform
|
|
|
|
* firmware has its own power management modes.
|
|
|
|
*/
|
|
|
|
if (intel_pstate_platform_pwr_mgmt_exists())
|
|
|
|
return -ENODEV;
|
|
|
|
|
2015-04-03 07:19:53 -06:00
|
|
|
cpu_def = (struct cpu_defaults *)id->driver_data;
|
2013-10-21 10:20:34 -06:00
|
|
|
|
2015-04-03 07:19:53 -06:00
|
|
|
copy_pid_params(&cpu_def->pid_policy);
|
|
|
|
copy_cpu_funcs(&cpu_def->funcs);
|
2013-10-21 10:20:34 -06:00
|
|
|
|
2013-03-21 18:29:28 -06:00
|
|
|
if (intel_pstate_msrs_not_valid())
|
|
|
|
return -ENODEV;
|
|
|
|
|
2013-02-06 10:02:13 -07:00
|
|
|
pr_info("Intel P-state driver initializing.\n");
|
|
|
|
|
2013-05-13 02:03:43 -06:00
|
|
|
all_cpu_data = vzalloc(sizeof(void *) * num_possible_cpus());
|
2013-02-06 10:02:13 -07:00
|
|
|
if (!all_cpu_data)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
2015-04-03 07:19:53 -06:00
|
|
|
if (static_cpu_has_safe(X86_FEATURE_HWP) && !no_hwp)
|
2014-11-06 10:40:47 -07:00
|
|
|
intel_pstate_hwp_enable();
|
|
|
|
|
2015-02-06 14:41:55 -07:00
|
|
|
if (!hwp_active && hwp_only)
|
|
|
|
goto out;
|
|
|
|
|
2013-02-06 10:02:13 -07:00
|
|
|
rc = cpufreq_register_driver(&intel_pstate_driver);
|
|
|
|
if (rc)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
intel_pstate_debug_expose_params();
|
|
|
|
intel_pstate_sysfs_expose_params();
|
2014-01-16 11:32:25 -07:00
|
|
|
|
2013-02-06 10:02:13 -07:00
|
|
|
return rc;
|
|
|
|
out:
|
2013-03-05 15:15:27 -07:00
|
|
|
get_online_cpus();
|
|
|
|
for_each_online_cpu(cpu) {
|
|
|
|
if (all_cpu_data[cpu]) {
|
|
|
|
del_timer_sync(&all_cpu_data[cpu]->timer);
|
|
|
|
kfree(all_cpu_data[cpu]);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
put_online_cpus();
|
|
|
|
vfree(all_cpu_data);
|
2013-02-06 10:02:13 -07:00
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
device_initcall(intel_pstate_init);
|
|
|
|
|
2013-02-15 14:55:10 -07:00
|
|
|
static int __init intel_pstate_setup(char *str)
|
|
|
|
{
|
|
|
|
if (!str)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (!strcmp(str, "disable"))
|
|
|
|
no_load = 1;
|
2014-11-06 10:40:47 -07:00
|
|
|
if (!strcmp(str, "no_hwp"))
|
|
|
|
no_hwp = 1;
|
2014-12-08 18:43:19 -07:00
|
|
|
if (!strcmp(str, "force"))
|
|
|
|
force_load = 1;
|
2015-02-06 14:41:55 -07:00
|
|
|
if (!strcmp(str, "hwp_only"))
|
|
|
|
hwp_only = 1;
|
2013-02-15 14:55:10 -07:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
early_param("intel_pstate", intel_pstate_setup);
|
|
|
|
|
2013-02-06 10:02:13 -07:00
|
|
|
MODULE_AUTHOR("Dirk Brandewie <dirk.j.brandewie@intel.com>");
|
|
|
|
MODULE_DESCRIPTION("'intel_pstate' - P state driver Intel Core processors");
|
|
|
|
MODULE_LICENSE("GPL");
|