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path: root/drivers/acpi/processor_idle.c
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Diffstat (limited to 'drivers/acpi/processor_idle.c')
-rw-r--r--drivers/acpi/processor_idle.c48
1 files changed, 14 insertions, 34 deletions
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index ed9a1cc690be..fc95308e9a11 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -28,19 +28,12 @@
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
-#include <linux/kernel.h>
#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/cpufreq.h>
-#include <linux/slab.h>
#include <linux/acpi.h>
#include <linux/dmi.h>
-#include <linux/moduleparam.h>
-#include <linux/sched.h> /* need_resched() */
-#include <linux/pm_qos.h>
+#include <linux/sched.h> /* need_resched() */
#include <linux/clockchips.h>
#include <linux/cpuidle.h>
-#include <linux/irqflags.h>
/*
* Include the apic definitions for x86 to have the APIC timer related defines
@@ -52,22 +45,14 @@
#include <asm/apic.h>
#endif
-#include <asm/io.h>
-#include <asm/uaccess.h>
-
#include <acpi/acpi_bus.h>
#include <acpi/processor.h>
-#include <asm/processor.h>
#define PREFIX "ACPI: "
#define ACPI_PROCESSOR_CLASS "processor"
#define _COMPONENT ACPI_PROCESSOR_COMPONENT
ACPI_MODULE_NAME("processor_idle");
-#define PM_TIMER_TICK_NS (1000000000ULL/PM_TIMER_FREQUENCY)
-#define C2_OVERHEAD 1 /* 1us */
-#define C3_OVERHEAD 1 /* 1us */
-#define PM_TIMER_TICKS_TO_US(p) (((p) * 1000)/(PM_TIMER_FREQUENCY/1000))
static unsigned int max_cstate __read_mostly = ACPI_PROCESSOR_MAX_POWER;
module_param(max_cstate, uint, 0000);
@@ -81,10 +66,11 @@ module_param(latency_factor, uint, 0644);
static DEFINE_PER_CPU(struct cpuidle_device *, acpi_cpuidle_device);
+static struct acpi_processor_cx *acpi_cstate[CPUIDLE_STATE_MAX];
+
static int disabled_by_idle_boot_param(void)
{
return boot_option_idle_override == IDLE_POLL ||
- boot_option_idle_override == IDLE_FORCE_MWAIT ||
boot_option_idle_override == IDLE_HALT;
}
@@ -736,8 +722,7 @@ static int acpi_idle_enter_c1(struct cpuidle_device *dev,
struct cpuidle_driver *drv, int index)
{
struct acpi_processor *pr;
- struct cpuidle_state_usage *state_usage = &dev->states_usage[index];
- struct acpi_processor_cx *cx = cpuidle_get_statedata(state_usage);
+ struct acpi_processor_cx *cx = acpi_cstate[index];
pr = __this_cpu_read(processors);
@@ -760,8 +745,7 @@ static int acpi_idle_enter_c1(struct cpuidle_device *dev,
*/
static int acpi_idle_play_dead(struct cpuidle_device *dev, int index)
{
- struct cpuidle_state_usage *state_usage = &dev->states_usage[index];
- struct acpi_processor_cx *cx = cpuidle_get_statedata(state_usage);
+ struct acpi_processor_cx *cx = acpi_cstate[index];
ACPI_FLUSH_CPU_CACHE();
@@ -791,8 +775,7 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
struct cpuidle_driver *drv, int index)
{
struct acpi_processor *pr;
- struct cpuidle_state_usage *state_usage = &dev->states_usage[index];
- struct acpi_processor_cx *cx = cpuidle_get_statedata(state_usage);
+ struct acpi_processor_cx *cx = acpi_cstate[index];
pr = __this_cpu_read(processors);
@@ -850,8 +833,7 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
struct cpuidle_driver *drv, int index)
{
struct acpi_processor *pr;
- struct cpuidle_state_usage *state_usage = &dev->states_usage[index];
- struct acpi_processor_cx *cx = cpuidle_get_statedata(state_usage);
+ struct acpi_processor_cx *cx = acpi_cstate[index];
pr = __this_cpu_read(processors);
@@ -943,13 +925,13 @@ struct cpuidle_driver acpi_idle_driver = {
* device i.e. per-cpu data
*
* @pr: the ACPI processor
+ * @dev : the cpuidle device
*/
-static int acpi_processor_setup_cpuidle_cx(struct acpi_processor *pr)
+static int acpi_processor_setup_cpuidle_cx(struct acpi_processor *pr,
+ struct cpuidle_device *dev)
{
int i, count = CPUIDLE_DRIVER_STATE_START;
struct acpi_processor_cx *cx;
- struct cpuidle_state_usage *state_usage;
- struct cpuidle_device *dev = per_cpu(acpi_cpuidle_device, pr->id);
if (!pr->flags.power_setup_done)
return -EINVAL;
@@ -968,7 +950,6 @@ static int acpi_processor_setup_cpuidle_cx(struct acpi_processor *pr)
for (i = 1; i < ACPI_PROCESSOR_MAX_POWER && i <= max_cstate; i++) {
cx = &pr->power.states[i];
- state_usage = &dev->states_usage[count];
if (!cx->valid)
continue;
@@ -979,8 +960,7 @@ static int acpi_processor_setup_cpuidle_cx(struct acpi_processor *pr)
!(acpi_gbl_FADT.flags & ACPI_FADT_C2_MP_SUPPORTED))
continue;
#endif
-
- cpuidle_set_statedata(state_usage, cx);
+ acpi_cstate[count] = cx;
count++;
if (count == CPUIDLE_STATE_MAX)
@@ -1104,7 +1084,7 @@ int acpi_processor_hotplug(struct acpi_processor *pr)
cpuidle_disable_device(dev);
acpi_processor_get_power_info(pr);
if (pr->flags.power) {
- acpi_processor_setup_cpuidle_cx(pr);
+ acpi_processor_setup_cpuidle_cx(pr, dev);
ret = cpuidle_enable_device(dev);
}
cpuidle_resume_and_unlock();
@@ -1162,8 +1142,8 @@ int acpi_processor_cst_has_changed(struct acpi_processor *pr)
continue;
acpi_processor_get_power_info(_pr);
if (_pr->flags.power) {
- acpi_processor_setup_cpuidle_cx(_pr);
dev = per_cpu(acpi_cpuidle_device, cpu);
+ acpi_processor_setup_cpuidle_cx(_pr, dev);
cpuidle_enable_device(dev);
}
}
@@ -1232,7 +1212,7 @@ int __cpuinit acpi_processor_power_init(struct acpi_processor *pr)
return -ENOMEM;
per_cpu(acpi_cpuidle_device, pr->id) = dev;
- acpi_processor_setup_cpuidle_cx(pr);
+ acpi_processor_setup_cpuidle_cx(pr, dev);
/* Register per-cpu cpuidle_device. Cpuidle driver
* must already be registered before registering device