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-rw-r--r--drivers/cpufreq/cpufreq_interactive.c1003
1 files changed, 0 insertions, 1003 deletions
diff --git a/drivers/cpufreq/cpufreq_interactive.c b/drivers/cpufreq/cpufreq_interactive.c
deleted file mode 100644
index 7dbacf0..0000000
--- a/drivers/cpufreq/cpufreq_interactive.c
+++ /dev/null
@@ -1,1003 +0,0 @@
-/*
- * drivers/cpufreq/cpufreq_interactive.c
- *
- * Copyright (C) 2010 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * Author: Mike Chan (mike@android.com)
- *
- */
-
-#include <linux/cpu.h>
-#include <linux/cpumask.h>
-#include <linux/cpufreq.h>
-#include <linux/mutex.h>
-#include <linux/sched.h>
-#include <linux/tick.h>
-#include <linux/time.h>
-#include <linux/timer.h>
-#include <linux/workqueue.h>
-#include <linux/kthread.h>
-#include <linux/mutex.h>
-#include <linux/slab.h>
-#include <linux/input.h>
-#include <asm/cputime.h>
-
-#define CREATE_TRACE_POINTS
-#include <trace/events/cpufreq_interactive.h>
-
-static atomic_t active_count = ATOMIC_INIT(0);
-
-struct cpufreq_interactive_cpuinfo {
- struct timer_list cpu_timer;
- int timer_idlecancel;
- u64 time_in_idle;
- u64 idle_exit_time;
- u64 timer_run_time;
- int idling;
- u64 target_set_time;
- u64 target_set_time_in_idle;
- struct cpufreq_policy *policy;
- struct cpufreq_frequency_table *freq_table;
- unsigned int target_freq;
- unsigned int floor_freq;
- u64 floor_validate_time;
- u64 hispeed_validate_time;
- int governor_enabled;
-};
-
-static DEFINE_PER_CPU(struct cpufreq_interactive_cpuinfo, cpuinfo);
-
-/* Workqueues handle frequency scaling */
-static struct task_struct *up_task;
-static struct workqueue_struct *down_wq;
-static struct work_struct freq_scale_down_work;
-static cpumask_t up_cpumask;
-static spinlock_t up_cpumask_lock;
-static cpumask_t down_cpumask;
-static spinlock_t down_cpumask_lock;
-static struct mutex set_speed_lock;
-
-/* Hi speed to bump to from lo speed when load burst (default max) */
-static u64 hispeed_freq;
-
-/* Go to hi speed when CPU load at or above this value. */
-#define DEFAULT_GO_HISPEED_LOAD 85
-static unsigned long go_hispeed_load;
-
-/*
- * The minimum amount of time to spend at a frequency before we can ramp down.
- */
-#define DEFAULT_MIN_SAMPLE_TIME (80 * USEC_PER_MSEC)
-static unsigned long min_sample_time;
-
-/*
- * The sample rate of the timer used to increase frequency
- */
-#define DEFAULT_TIMER_RATE (20 * USEC_PER_MSEC)
-static unsigned long timer_rate;
-
-/*
- * Wait this long before raising speed above hispeed, by default a single
- * timer interval.
- */
-#define DEFAULT_ABOVE_HISPEED_DELAY DEFAULT_TIMER_RATE
-static unsigned long above_hispeed_delay_val;
-
-/*
- * Boost pulse to hispeed on touchscreen input.
- */
-
-static int input_boost_val;
-
-struct cpufreq_interactive_inputopen {
- struct input_handle *handle;
- struct work_struct inputopen_work;
-};
-
-static struct cpufreq_interactive_inputopen inputopen;
-
-/*
- * Non-zero means longer-term speed boost active.
- */
-
-static int boost_val;
-
-static int cpufreq_governor_interactive(struct cpufreq_policy *policy,
- unsigned int event);
-
-#ifndef CONFIG_CPU_FREQ_DEFAULT_GOV_INTERACTIVE
-static
-#endif
-struct cpufreq_governor cpufreq_gov_interactive = {
- .name = "interactive",
- .governor = cpufreq_governor_interactive,
- .max_transition_latency = 10000000,
- .owner = THIS_MODULE,
-};
-
-static void cpufreq_interactive_timer(unsigned long data)
-{
- unsigned int delta_idle;
- unsigned int delta_time;
- int cpu_load;
- int load_since_change;
- u64 time_in_idle;
- u64 idle_exit_time;
- struct cpufreq_interactive_cpuinfo *pcpu =
- &per_cpu(cpuinfo, data);
- u64 now_idle;
- unsigned int new_freq;
- unsigned int index;
- unsigned long flags;
-
- smp_rmb();
-
- if (!pcpu->governor_enabled)
- goto exit;
-
- /*
- * Once pcpu->timer_run_time is updated to >= pcpu->idle_exit_time,
- * this lets idle exit know the current idle time sample has
- * been processed, and idle exit can generate a new sample and
- * re-arm the timer. This prevents a concurrent idle
- * exit on that CPU from writing a new set of info at the same time
- * the timer function runs (the timer function can't use that info
- * until more time passes).
- */
- time_in_idle = pcpu->time_in_idle;
- idle_exit_time = pcpu->idle_exit_time;
- now_idle = get_cpu_idle_time_us(data, &pcpu->timer_run_time);
- smp_wmb();
-
- /* If we raced with cancelling a timer, skip. */
- if (!idle_exit_time)
- goto exit;
-
- delta_idle = (unsigned int) cputime64_sub(now_idle, time_in_idle);
- delta_time = (unsigned int) cputime64_sub(pcpu->timer_run_time,
- idle_exit_time);
-
- /*
- * If timer ran less than 1ms after short-term sample started, retry.
- */
- if (delta_time < 1000)
- goto rearm;
-
- if (delta_idle > delta_time)
- cpu_load = 0;
- else
- cpu_load = 100 * (delta_time - delta_idle) / delta_time;
-
- delta_idle = (unsigned int) cputime64_sub(now_idle,
- pcpu->target_set_time_in_idle);
- delta_time = (unsigned int) cputime64_sub(pcpu->timer_run_time,
- pcpu->target_set_time);
-
- if ((delta_time == 0) || (delta_idle > delta_time))
- load_since_change = 0;
- else
- load_since_change =
- 100 * (delta_time - delta_idle) / delta_time;
-
- /*
- * Choose greater of short-term load (since last idle timer
- * started or timer function re-armed itself) or long-term load
- * (since last frequency change).
- */
- if (load_since_change > cpu_load)
- cpu_load = load_since_change;
-
- if (cpu_load >= go_hispeed_load || boost_val) {
- if (pcpu->target_freq <= pcpu->policy->min) {
- new_freq = hispeed_freq;
- } else {
- new_freq = pcpu->policy->max * cpu_load / 100;
-
- if (new_freq < hispeed_freq)
- new_freq = hispeed_freq;
-
- if (pcpu->target_freq == hispeed_freq &&
- new_freq > hispeed_freq &&
- cputime64_sub(pcpu->timer_run_time,
- pcpu->hispeed_validate_time)
- < above_hispeed_delay_val) {
- trace_cpufreq_interactive_notyet(data, cpu_load,
- pcpu->target_freq,
- new_freq);
- goto rearm;
- }
- }
- } else {
- new_freq = pcpu->policy->max * cpu_load / 100;
- }
-
- if (new_freq <= hispeed_freq)
- pcpu->hispeed_validate_time = pcpu->timer_run_time;
-
- if (cpufreq_frequency_table_target(pcpu->policy, pcpu->freq_table,
- new_freq, CPUFREQ_RELATION_H,
- &index)) {
- pr_warn_once("timer %d: cpufreq_frequency_table_target error\n",
- (int) data);
- goto rearm;
- }
-
- new_freq = pcpu->freq_table[index].frequency;
-
- /*
- * Do not scale below floor_freq unless we have been at or above the
- * floor frequency for the minimum sample time since last validated.
- */
- if (new_freq < pcpu->floor_freq) {
- if (cputime64_sub(pcpu->timer_run_time,
- pcpu->floor_validate_time)
- < min_sample_time) {
- trace_cpufreq_interactive_notyet(data, cpu_load,
- pcpu->target_freq, new_freq);
- goto rearm;
- }
- }
-
- pcpu->floor_freq = new_freq;
- pcpu->floor_validate_time = pcpu->timer_run_time;
-
- if (pcpu->target_freq == new_freq) {
- trace_cpufreq_interactive_already(data, cpu_load,
- pcpu->target_freq, new_freq);
- goto rearm_if_notmax;
- }
-
- trace_cpufreq_interactive_target(data, cpu_load, pcpu->target_freq,
- new_freq);
- pcpu->target_set_time_in_idle = now_idle;
- pcpu->target_set_time = pcpu->timer_run_time;
-
- if (new_freq < pcpu->target_freq) {
- pcpu->target_freq = new_freq;
- spin_lock_irqsave(&down_cpumask_lock, flags);
- cpumask_set_cpu(data, &down_cpumask);
- spin_unlock_irqrestore(&down_cpumask_lock, flags);
- queue_work(down_wq, &freq_scale_down_work);
- } else {
- pcpu->target_freq = new_freq;
- spin_lock_irqsave(&up_cpumask_lock, flags);
- cpumask_set_cpu(data, &up_cpumask);
- spin_unlock_irqrestore(&up_cpumask_lock, flags);
- wake_up_process(up_task);
- }
-
-rearm_if_notmax:
- /*
- * Already set max speed and don't see a need to change that,
- * wait until next idle to re-evaluate, don't need timer.
- */
- if (pcpu->target_freq == pcpu->policy->max)
- goto exit;
-
-rearm:
- if (!timer_pending(&pcpu->cpu_timer)) {
- /*
- * If already at min: if that CPU is idle, don't set timer.
- * Else cancel the timer if that CPU goes idle. We don't
- * need to re-evaluate speed until the next idle exit.
- */
- if (pcpu->target_freq == pcpu->policy->min) {
- smp_rmb();
-
- if (pcpu->idling)
- goto exit;
-
- pcpu->timer_idlecancel = 1;
- }
-
- pcpu->time_in_idle = get_cpu_idle_time_us(
- data, &pcpu->idle_exit_time);
- mod_timer(&pcpu->cpu_timer,
- jiffies + usecs_to_jiffies(timer_rate));
- }
-
-exit:
- return;
-}
-
-static void cpufreq_interactive_idle_start(void)
-{
- struct cpufreq_interactive_cpuinfo *pcpu =
- &per_cpu(cpuinfo, smp_processor_id());
- int pending;
-
- if (!pcpu->governor_enabled)
- return;
-
- pcpu->idling = 1;
- smp_wmb();
- pending = timer_pending(&pcpu->cpu_timer);
-
- if (pcpu->target_freq != pcpu->policy->min) {
-#ifdef CONFIG_SMP
- /*
- * Entering idle while not at lowest speed. On some
- * platforms this can hold the other CPU(s) at that speed
- * even though the CPU is idle. Set a timer to re-evaluate
- * speed so this idle CPU doesn't hold the other CPUs above
- * min indefinitely. This should probably be a quirk of
- * the CPUFreq driver.
- */
- if (!pending) {
- pcpu->time_in_idle = get_cpu_idle_time_us(
- smp_processor_id(), &pcpu->idle_exit_time);
- pcpu->timer_idlecancel = 0;
- mod_timer(&pcpu->cpu_timer,
- jiffies + usecs_to_jiffies(timer_rate));
- }
-#endif
- } else {
- /*
- * If at min speed and entering idle after load has
- * already been evaluated, and a timer has been set just in
- * case the CPU suddenly goes busy, cancel that timer. The
- * CPU didn't go busy; we'll recheck things upon idle exit.
- */
- if (pending && pcpu->timer_idlecancel) {
- del_timer(&pcpu->cpu_timer);
- /*
- * Ensure last timer run time is after current idle
- * sample start time, so next idle exit will always
- * start a new idle sampling period.
- */
- pcpu->idle_exit_time = 0;
- pcpu->timer_idlecancel = 0;
- }
- }
-
-}
-
-static void cpufreq_interactive_idle_end(void)
-{
- struct cpufreq_interactive_cpuinfo *pcpu =
- &per_cpu(cpuinfo, smp_processor_id());
-
- pcpu->idling = 0;
- smp_wmb();
-
- /*
- * Arm the timer for 1-2 ticks later if not already, and if the timer
- * function has already processed the previous load sampling
- * interval. (If the timer is not pending but has not processed
- * the previous interval, it is probably racing with us on another
- * CPU. Let it compute load based on the previous sample and then
- * re-arm the timer for another interval when it's done, rather
- * than updating the interval start time to be "now", which doesn't
- * give the timer function enough time to make a decision on this
- * run.)
- */
- if (timer_pending(&pcpu->cpu_timer) == 0 &&
- pcpu->timer_run_time >= pcpu->idle_exit_time &&
- pcpu->governor_enabled) {
- pcpu->time_in_idle =
- get_cpu_idle_time_us(smp_processor_id(),
- &pcpu->idle_exit_time);
- pcpu->timer_idlecancel = 0;
- mod_timer(&pcpu->cpu_timer,
- jiffies + usecs_to_jiffies(timer_rate));
- }
-
-}
-
-static int cpufreq_interactive_up_task(void *data)
-{
- unsigned int cpu;
- cpumask_t tmp_mask;
- unsigned long flags;
- struct cpufreq_interactive_cpuinfo *pcpu;
-
- while (1) {
- set_current_state(TASK_INTERRUPTIBLE);
- spin_lock_irqsave(&up_cpumask_lock, flags);
-
- if (cpumask_empty(&up_cpumask)) {
- spin_unlock_irqrestore(&up_cpumask_lock, flags);
- schedule();
-
- if (kthread_should_stop())
- break;
-
- spin_lock_irqsave(&up_cpumask_lock, flags);
- }
-
- set_current_state(TASK_RUNNING);
- tmp_mask = up_cpumask;
- cpumask_clear(&up_cpumask);
- spin_unlock_irqrestore(&up_cpumask_lock, flags);
-
- for_each_cpu(cpu, &tmp_mask) {
- unsigned int j;
- unsigned int max_freq = 0;
-
- pcpu = &per_cpu(cpuinfo, cpu);
- smp_rmb();
-
- if (!pcpu->governor_enabled)
- continue;
-
- mutex_lock(&set_speed_lock);
-
- for_each_cpu(j, pcpu->policy->cpus) {
- struct cpufreq_interactive_cpuinfo *pjcpu =
- &per_cpu(cpuinfo, j);
-
- if (pjcpu->target_freq > max_freq)
- max_freq = pjcpu->target_freq;
- }
-
- if (max_freq != pcpu->policy->cur)
- __cpufreq_driver_target(pcpu->policy,
- max_freq,
- CPUFREQ_RELATION_H);
- mutex_unlock(&set_speed_lock);
- trace_cpufreq_interactive_up(cpu, pcpu->target_freq,
- pcpu->policy->cur);
- }
- }
-
- return 0;
-}
-
-static void cpufreq_interactive_freq_down(struct work_struct *work)
-{
- unsigned int cpu;
- cpumask_t tmp_mask;
- unsigned long flags;
- struct cpufreq_interactive_cpuinfo *pcpu;
-
- spin_lock_irqsave(&down_cpumask_lock, flags);
- tmp_mask = down_cpumask;
- cpumask_clear(&down_cpumask);
- spin_unlock_irqrestore(&down_cpumask_lock, flags);
-
- for_each_cpu(cpu, &tmp_mask) {
- unsigned int j;
- unsigned int max_freq = 0;
-
- pcpu = &per_cpu(cpuinfo, cpu);
- smp_rmb();
-
- if (!pcpu->governor_enabled)
- continue;
-
- mutex_lock(&set_speed_lock);
-
- for_each_cpu(j, pcpu->policy->cpus) {
- struct cpufreq_interactive_cpuinfo *pjcpu =
- &per_cpu(cpuinfo, j);
-
- if (pjcpu->target_freq > max_freq)
- max_freq = pjcpu->target_freq;
- }
-
- if (max_freq != pcpu->policy->cur)
- __cpufreq_driver_target(pcpu->policy, max_freq,
- CPUFREQ_RELATION_H);
-
- mutex_unlock(&set_speed_lock);
- trace_cpufreq_interactive_down(cpu, pcpu->target_freq,
- pcpu->policy->cur);
- }
-}
-
-static void cpufreq_interactive_boost(void)
-{
- int i;
- int anyboost = 0;
- unsigned long flags;
- struct cpufreq_interactive_cpuinfo *pcpu;
-
- spin_lock_irqsave(&up_cpumask_lock, flags);
-
- for_each_online_cpu(i) {
- pcpu = &per_cpu(cpuinfo, i);
-
- if (pcpu->target_freq < hispeed_freq) {
- pcpu->target_freq = hispeed_freq;
- cpumask_set_cpu(i, &up_cpumask);
- pcpu->target_set_time_in_idle =
- get_cpu_idle_time_us(i, &pcpu->target_set_time);
- pcpu->hispeed_validate_time = pcpu->target_set_time;
- anyboost = 1;
- }
-
- /*
- * Set floor freq and (re)start timer for when last
- * validated.
- */
-
- pcpu->floor_freq = hispeed_freq;
- pcpu->floor_validate_time = ktime_to_us(ktime_get());
- }
-
- spin_unlock_irqrestore(&up_cpumask_lock, flags);
-
- if (anyboost)
- wake_up_process(up_task);
-}
-
-/*
- * Pulsed boost on input event raises CPUs to hispeed_freq and lets
- * usual algorithm of min_sample_time decide when to allow speed
- * to drop.
- */
-
-static void cpufreq_interactive_input_event(struct input_handle *handle,
- unsigned int type,
- unsigned int code, int value)
-{
- if (input_boost_val && type == EV_SYN && code == SYN_REPORT) {
- trace_cpufreq_interactive_boost("input");
- cpufreq_interactive_boost();
- }
-}
-
-static void cpufreq_interactive_input_open(struct work_struct *w)
-{
- struct cpufreq_interactive_inputopen *io =
- container_of(w, struct cpufreq_interactive_inputopen,
- inputopen_work);
- int error;
-
- error = input_open_device(io->handle);
- if (error)
- input_unregister_handle(io->handle);
-}
-
-static int cpufreq_interactive_input_connect(struct input_handler *handler,
- struct input_dev *dev,
- const struct input_device_id *id)
-{
- struct input_handle *handle;
- int error;
-
- pr_info("%s: connect to %s\n", __func__, dev->name);
- handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
- if (!handle)
- return -ENOMEM;
-
- handle->dev = dev;
- handle->handler = handler;
- handle->name = "cpufreq_interactive";
-
- error = input_register_handle(handle);
- if (error)
- goto err;
-
- inputopen.handle = handle;
- queue_work(down_wq, &inputopen.inputopen_work);
- return 0;
-err:
- kfree(handle);
- return error;
-}
-
-static void cpufreq_interactive_input_disconnect(struct input_handle *handle)
-{
- input_close_device(handle);
- input_unregister_handle(handle);
- kfree(handle);
-}
-
-static const struct input_device_id cpufreq_interactive_ids[] = {
- {
- .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
- INPUT_DEVICE_ID_MATCH_ABSBIT,
- .evbit = { BIT_MASK(EV_ABS) },
- .absbit = { [BIT_WORD(ABS_MT_POSITION_X)] =
- BIT_MASK(ABS_MT_POSITION_X) |
- BIT_MASK(ABS_MT_POSITION_Y) },
- }, /* multi-touch touchscreen */
- {
- .flags = INPUT_DEVICE_ID_MATCH_KEYBIT |
- INPUT_DEVICE_ID_MATCH_ABSBIT,
- .keybit = { [BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH) },
- .absbit = { [BIT_WORD(ABS_X)] =
- BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) },
- }, /* touchpad */
- { },
-};
-
-static struct input_handler cpufreq_interactive_input_handler = {
- .event = cpufreq_interactive_input_event,
- .connect = cpufreq_interactive_input_connect,
- .disconnect = cpufreq_interactive_input_disconnect,
- .name = "cpufreq_interactive",
- .id_table = cpufreq_interactive_ids,
-};
-
-static ssize_t show_hispeed_freq(struct kobject *kobj,
- struct attribute *attr, char *buf)
-{
- return sprintf(buf, "%llu\n", hispeed_freq);
-}
-
-static ssize_t store_hispeed_freq(struct kobject *kobj,
- struct attribute *attr, const char *buf,
- size_t count)
-{
- int ret;
- u64 val;
-
- ret = strict_strtoull(buf, 0, &val);
- if (ret < 0)
- return ret;
- hispeed_freq = val;
- return count;
-}
-
-static struct global_attr hispeed_freq_attr = __ATTR(hispeed_freq, 0644,
- show_hispeed_freq, store_hispeed_freq);
-
-
-static ssize_t show_go_hispeed_load(struct kobject *kobj,
- struct attribute *attr, char *buf)
-{
- return sprintf(buf, "%lu\n", go_hispeed_load);
-}
-
-static ssize_t store_go_hispeed_load(struct kobject *kobj,
- struct attribute *attr, const char *buf, size_t count)
-{
- int ret;
- unsigned long val;
-
- ret = strict_strtoul(buf, 0, &val);
- if (ret < 0)
- return ret;
- go_hispeed_load = val;
- return count;
-}
-
-static struct global_attr go_hispeed_load_attr = __ATTR(go_hispeed_load, 0644,
- show_go_hispeed_load, store_go_hispeed_load);
-
-static ssize_t show_min_sample_time(struct kobject *kobj,
- struct attribute *attr, char *buf)
-{
- return sprintf(buf, "%lu\n", min_sample_time);
-}
-
-static ssize_t store_min_sample_time(struct kobject *kobj,
- struct attribute *attr, const char *buf, size_t count)
-{
- int ret;
- unsigned long val;
-
- ret = strict_strtoul(buf, 0, &val);
- if (ret < 0)
- return ret;
- min_sample_time = val;
- return count;
-}
-
-static struct global_attr min_sample_time_attr = __ATTR(min_sample_time, 0644,
- show_min_sample_time, store_min_sample_time);
-
-static ssize_t show_above_hispeed_delay(struct kobject *kobj,
- struct attribute *attr, char *buf)
-{
- return sprintf(buf, "%lu\n", above_hispeed_delay_val);
-}
-
-static ssize_t store_above_hispeed_delay(struct kobject *kobj,
- struct attribute *attr,
- const char *buf, size_t count)
-{
- int ret;
- unsigned long val;
-
- ret = strict_strtoul(buf, 0, &val);
- if (ret < 0)
- return ret;
- above_hispeed_delay_val = val;
- return count;
-}
-
-define_one_global_rw(above_hispeed_delay);
-
-static ssize_t show_timer_rate(struct kobject *kobj,
- struct attribute *attr, char *buf)
-{
- return sprintf(buf, "%lu\n", timer_rate);
-}
-
-static ssize_t store_timer_rate(struct kobject *kobj,
- struct attribute *attr, const char *buf, size_t count)
-{
- int ret;
- unsigned long val;
-
- ret = strict_strtoul(buf, 0, &val);
- if (ret < 0)
- return ret;
- timer_rate = val;
- return count;
-}
-
-static struct global_attr timer_rate_attr = __ATTR(timer_rate, 0644,
- show_timer_rate, store_timer_rate);
-
-static ssize_t show_input_boost(struct kobject *kobj, struct attribute *attr,
- char *buf)
-{
- return sprintf(buf, "%u\n", input_boost_val);
-}
-
-static ssize_t store_input_boost(struct kobject *kobj, struct attribute *attr,
- const char *buf, size_t count)
-{
- int ret;
- unsigned long val;
-
- ret = strict_strtoul(buf, 0, &val);
- if (ret < 0)
- return ret;
- input_boost_val = val;
- return count;
-}
-
-define_one_global_rw(input_boost);
-
-static ssize_t show_boost(struct kobject *kobj, struct attribute *attr,
- char *buf)
-{
- return sprintf(buf, "%d\n", boost_val);
-}
-
-static ssize_t store_boost(struct kobject *kobj, struct attribute *attr,
- const char *buf, size_t count)
-{
- int ret;
- unsigned long val;
-
- ret = kstrtoul(buf, 0, &val);
- if (ret < 0)
- return ret;
-
- boost_val = val;
-
- if (boost_val) {
- trace_cpufreq_interactive_boost("on");
- cpufreq_interactive_boost();
- } else {
- trace_cpufreq_interactive_unboost("off");
- }
-
- return count;
-}
-
-define_one_global_rw(boost);
-
-static ssize_t store_boostpulse(struct kobject *kobj, struct attribute *attr,
- const char *buf, size_t count)
-{
- int ret;
- unsigned long val;
-
- ret = kstrtoul(buf, 0, &val);
- if (ret < 0)
- return ret;
-
- trace_cpufreq_interactive_boost("pulse");
- cpufreq_interactive_boost();
- return count;
-}
-
-static struct global_attr boostpulse =
- __ATTR(boostpulse, 0200, NULL, store_boostpulse);
-
-static struct attribute *interactive_attributes[] = {
- &hispeed_freq_attr.attr,
- &go_hispeed_load_attr.attr,
- &above_hispeed_delay.attr,
- &min_sample_time_attr.attr,
- &timer_rate_attr.attr,
- &input_boost.attr,
- &boost.attr,
- &boostpulse.attr,
- NULL,
-};
-
-static struct attribute_group interactive_attr_group = {
- .attrs = interactive_attributes,
- .name = "interactive",
-};
-
-static int cpufreq_governor_interactive(struct cpufreq_policy *policy,
- unsigned int event)
-{
- int rc;
- unsigned int j;
- struct cpufreq_interactive_cpuinfo *pcpu;
- struct cpufreq_frequency_table *freq_table;
-
- switch (event) {
- case CPUFREQ_GOV_START:
- if (!cpu_online(policy->cpu))
- return -EINVAL;
-
- freq_table =
- cpufreq_frequency_get_table(policy->cpu);
-
- for_each_cpu(j, policy->cpus) {
- pcpu = &per_cpu(cpuinfo, j);
- pcpu->policy = policy;
- pcpu->target_freq = policy->cur;
- pcpu->freq_table = freq_table;
- pcpu->target_set_time_in_idle =
- get_cpu_idle_time_us(j,
- &pcpu->target_set_time);
- pcpu->floor_freq = pcpu->target_freq;
- pcpu->floor_validate_time =
- pcpu->target_set_time;
- pcpu->hispeed_validate_time =
- pcpu->target_set_time;
- pcpu->governor_enabled = 1;
- smp_wmb();
- }
-
- if (!hispeed_freq)
- hispeed_freq = policy->max;
-
- /*
- * Do not register the idle hook and create sysfs
- * entries if we have already done so.
- */
- if (atomic_inc_return(&active_count) > 1)
- return 0;
-
- rc = sysfs_create_group(cpufreq_global_kobject,
- &interactive_attr_group);
- if (rc)
- return rc;
-
- rc = input_register_handler(&cpufreq_interactive_input_handler);
- if (rc)
- pr_warn("%s: failed to register input handler\n",
- __func__);
-
- break;
-
- case CPUFREQ_GOV_STOP:
- for_each_cpu(j, policy->cpus) {
- pcpu = &per_cpu(cpuinfo, j);
- pcpu->governor_enabled = 0;
- smp_wmb();
- del_timer_sync(&pcpu->cpu_timer);
-
- /*
- * Reset idle exit time since we may cancel the timer
- * before it can run after the last idle exit time,
- * to avoid tripping the check in idle exit for a timer
- * that is trying to run.
- */
- pcpu->idle_exit_time = 0;
- }
-
- flush_work(&freq_scale_down_work);
- if (atomic_dec_return(&active_count) > 0)
- return 0;
-
- input_unregister_handler(&cpufreq_interactive_input_handler);
- sysfs_remove_group(cpufreq_global_kobject,
- &interactive_attr_group);
-
- break;
-
- case CPUFREQ_GOV_LIMITS:
- if (policy->max < policy->cur)
- __cpufreq_driver_target(policy,
- policy->max, CPUFREQ_RELATION_H);
- else if (policy->min > policy->cur)
- __cpufreq_driver_target(policy,
- policy->min, CPUFREQ_RELATION_L);
- break;
- }
- return 0;
-}
-
-static int cpufreq_interactive_idle_notifier(struct notifier_block *nb,
- unsigned long val,
- void *data)
-{
- switch (val) {
- case IDLE_START:
- cpufreq_interactive_idle_start();
- break;
- case IDLE_END:
- cpufreq_interactive_idle_end();
- break;
- }
-
- return 0;
-}
-
-static struct notifier_block cpufreq_interactive_idle_nb = {
- .notifier_call = cpufreq_interactive_idle_notifier,
-};
-
-static int __init cpufreq_interactive_init(void)
-{
- unsigned int i;
- struct cpufreq_interactive_cpuinfo *pcpu;
- struct sched_param param = { .sched_priority = MAX_RT_PRIO-1 };
-
- go_hispeed_load = DEFAULT_GO_HISPEED_LOAD;
- min_sample_time = DEFAULT_MIN_SAMPLE_TIME;
- above_hispeed_delay_val = DEFAULT_ABOVE_HISPEED_DELAY;
- timer_rate = DEFAULT_TIMER_RATE;
-
- /* Initalize per-cpu timers */
- for_each_possible_cpu(i) {
- pcpu = &per_cpu(cpuinfo, i);
- init_timer(&pcpu->cpu_timer);
- pcpu->cpu_timer.function = cpufreq_interactive_timer;
- pcpu->cpu_timer.data = i;
- }
-
- up_task = kthread_create(cpufreq_interactive_up_task, NULL,
- "kinteractiveup");
- if (IS_ERR(up_task))
- return PTR_ERR(up_task);
-
- sched_setscheduler_nocheck(up_task, SCHED_FIFO, &param);
- get_task_struct(up_task);
-
- /* No rescuer thread, bind to CPU queuing the work for possibly
- warm cache (probably doesn't matter much). */
- down_wq = alloc_workqueue("knteractive_down", 0, 1);
-
- if (!down_wq)
- goto err_freeuptask;
-
- INIT_WORK(&freq_scale_down_work,
- cpufreq_interactive_freq_down);
-
- spin_lock_init(&up_cpumask_lock);
- spin_lock_init(&down_cpumask_lock);
- mutex_init(&set_speed_lock);
-
- idle_notifier_register(&cpufreq_interactive_idle_nb);
- INIT_WORK(&inputopen.inputopen_work, cpufreq_interactive_input_open);
- return cpufreq_register_governor(&cpufreq_gov_interactive);
-
-err_freeuptask:
- put_task_struct(up_task);
- return -ENOMEM;
-}
-
-#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_INTERACTIVE
-fs_initcall(cpufreq_interactive_init);
-#else
-module_init(cpufreq_interactive_init);
-#endif
-
-static void __exit cpufreq_interactive_exit(void)
-{
- cpufreq_unregister_governor(&cpufreq_gov_interactive);
- kthread_stop(up_task);
- put_task_struct(up_task);
- destroy_workqueue(down_wq);
-}
-
-module_exit(cpufreq_interactive_exit);
-
-MODULE_AUTHOR("Mike Chan <mike@android.com>");
-MODULE_DESCRIPTION("'cpufreq_interactive' - A cpufreq governor for "
- "Latency sensitive workloads");
-MODULE_LICENSE("GPL");