Commit 296699de authored by Rafael J. Wysocki's avatar Rafael J. Wysocki Committed by Linus Torvalds
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Introduce CONFIG_SUSPEND for suspend-to-Ram and standby



Introduce CONFIG_SUSPEND representing the ability to enter system sleep
states, such as the ACPI S3 state, and allow the user to choose SUSPEND
and HIBERNATION independently of each other.

Make HOTPLUG_CPU be selected automatically if SUSPEND or HIBERNATION has
been chosen and the kernel is intended for SMP systems.

Also, introduce CONFIG_PM_SLEEP which is automatically selected if
CONFIG_SUSPEND or CONFIG_HIBERNATION is set and use it to select the
code needed for both suspend and hibernation.

The top-level power management headers and the ACPI code related to
suspend and hibernation are modified to use the new definitions (the
changes in drivers/acpi/sleep/main.c are, mostly, moving code to reduce
the number of ifdefs).

There are many other files in which CONFIG_PM can be replaced with
CONFIG_PM_SLEEP or even with CONFIG_SUSPEND, but they can be updated in
the future.
Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent b0cb1a19
......@@ -63,6 +63,14 @@ config ACPI_PROCFS
Say N to delete /proc/acpi/ files that have moved to /sys/
config ACPI_PROCFS_SLEEP
bool "/proc/acpi/sleep (deprecated)"
depends on PM_SLEEP && ACPI_PROCFS
default n
---help---
Create /proc/acpi/sleep
Deprecated by /sys/power/state
config ACPI_AC
tristate "AC Adapter"
depends on X86
......
obj-y := poweroff.o wakeup.o
obj-y += main.o
obj-$(CONFIG_PM_SLEEP) += main.o
obj-$(CONFIG_X86) += proc.o
EXTRA_CFLAGS += $(ACPI_CFLAGS)
......@@ -21,6 +21,9 @@
u8 sleep_states[ACPI_S_STATE_COUNT];
static u32 acpi_target_sleep_state = ACPI_STATE_S0;
#ifdef CONFIG_SUSPEND
static struct pm_ops acpi_pm_ops;
extern void do_suspend_lowlevel(void);
......@@ -34,11 +37,6 @@ static u32 acpi_suspend_states[] = {
static int init_8259A_after_S1;
extern int acpi_sleep_prepare(u32 acpi_state);
extern void acpi_power_off(void);
static u32 acpi_target_sleep_state = ACPI_STATE_S0;
/**
* acpi_pm_set_target - Set the target system sleep state to the state
* associated with given @pm_state, if supported.
......@@ -163,21 +161,6 @@ static int acpi_pm_finish(suspend_state_t pm_state)
return 0;
}
int acpi_suspend(u32 acpi_state)
{
suspend_state_t states[] = {
[1] = PM_SUSPEND_STANDBY,
[3] = PM_SUSPEND_MEM,
[5] = PM_SUSPEND_MAX
};
if (acpi_state < 6 && states[acpi_state])
return pm_suspend(states[acpi_state]);
if (acpi_state == 4)
return hibernate();
return -EINVAL;
}
static int acpi_pm_state_valid(suspend_state_t pm_state)
{
u32 acpi_state;
......@@ -202,6 +185,27 @@ static struct pm_ops acpi_pm_ops = {
.finish = acpi_pm_finish,
};
/*
* Toshiba fails to preserve interrupts over S1, reinitialization
* of 8259 is needed after S1 resume.
*/
static int __init init_ints_after_s1(struct dmi_system_id *d)
{
printk(KERN_WARNING "%s with broken S1 detected.\n", d->ident);
init_8259A_after_S1 = 1;
return 0;
}
static struct dmi_system_id __initdata acpisleep_dmi_table[] = {
{
.callback = init_ints_after_s1,
.ident = "Toshiba Satellite 4030cdt",
.matches = {DMI_MATCH(DMI_PRODUCT_NAME, "S4030CDT/4.3"),},
},
{},
};
#endif /* CONFIG_SUSPEND */
#ifdef CONFIG_HIBERNATION
static int acpi_hibernation_prepare(void)
{
......@@ -256,6 +260,21 @@ static struct hibernation_ops acpi_hibernation_ops = {
};
#endif /* CONFIG_HIBERNATION */
int acpi_suspend(u32 acpi_state)
{
suspend_state_t states[] = {
[1] = PM_SUSPEND_STANDBY,
[3] = PM_SUSPEND_MEM,
[5] = PM_SUSPEND_MAX
};
if (acpi_state < 6 && states[acpi_state])
return pm_suspend(states[acpi_state]);
if (acpi_state == 4)
return hibernate();
return -EINVAL;
}
/**
* acpi_pm_device_sleep_state - return preferred power state of ACPI device
* in the system sleep state given by %acpi_target_sleep_state
......@@ -331,39 +350,22 @@ int acpi_pm_device_sleep_state(struct device *dev, int wake, int *d_min_p)
return d_max;
}
/*
* Toshiba fails to preserve interrupts over S1, reinitialization
* of 8259 is needed after S1 resume.
*/
static int __init init_ints_after_s1(struct dmi_system_id *d)
{
printk(KERN_WARNING "%s with broken S1 detected.\n", d->ident);
init_8259A_after_S1 = 1;
return 0;
}
static struct dmi_system_id __initdata acpisleep_dmi_table[] = {
{
.callback = init_ints_after_s1,
.ident = "Toshiba Satellite 4030cdt",
.matches = {DMI_MATCH(DMI_PRODUCT_NAME, "S4030CDT/4.3"),},
},
{},
};
int __init acpi_sleep_init(void)
{
acpi_status status;
u8 type_a, type_b;
#ifdef CONFIG_SUSPEND
int i = 0;
dmi_check_system(acpisleep_dmi_table);
#endif
if (acpi_disabled)
return 0;
#ifdef CONFIG_SUSPEND
printk(KERN_INFO PREFIX "(supports");
for (i = 0; i < ACPI_S_STATE_COUNT; i++) {
acpi_status status;
u8 type_a, type_b;
for (i = ACPI_STATE_S0; i < ACPI_STATE_S4; i++) {
status = acpi_get_sleep_type_data(i, &type_a, &type_b);
if (ACPI_SUCCESS(status)) {
sleep_states[i] = 1;
......@@ -373,10 +375,14 @@ int __init acpi_sleep_init(void)
printk(")\n");
pm_set_ops(&acpi_pm_ops);
#endif
#ifdef CONFIG_HIBERNATION
if (sleep_states[ACPI_STATE_S4])
status = acpi_get_sleep_type_data(ACPI_STATE_S4, &type_a, &type_b);
if (ACPI_SUCCESS(status)) {
hibernation_set_ops(&acpi_hibernation_ops);
sleep_states[ACPI_STATE_S4] = 1;
}
#else
sleep_states[ACPI_STATE_S4] = 0;
#endif
......
......@@ -23,7 +23,7 @@
*/
ACPI_MODULE_NAME("sleep")
#ifdef CONFIG_ACPI_PROCFS
#ifdef CONFIG_ACPI_PROCFS_SLEEP
static int acpi_system_sleep_seq_show(struct seq_file *seq, void *offset)
{
int i;
......@@ -76,7 +76,7 @@ acpi_system_write_sleep(struct file *file,
Done:
return error ? error : count;
}
#endif /* CONFIG_ACPI_PROCFS */
#endif /* CONFIG_ACPI_PROCFS_SLEEP */
#if defined(CONFIG_RTC_DRV_CMOS) || defined(CONFIG_RTC_DRV_CMOS_MODULE)
/* use /sys/class/rtc/rtcX/wakealarm instead; it's not ACPI-specific */
......@@ -471,7 +471,7 @@ static const struct file_operations acpi_system_wakeup_device_fops = {
.release = single_release,
};
#ifdef CONFIG_ACPI_PROCFS
#ifdef CONFIG_ACPI_PROCFS_SLEEP
static const struct file_operations acpi_system_sleep_fops = {
.open = acpi_system_sleep_open_fs,
.read = seq_read,
......@@ -479,7 +479,7 @@ static const struct file_operations acpi_system_sleep_fops = {
.llseek = seq_lseek,
.release = single_release,
};
#endif /* CONFIG_ACPI_PROCFS */
#endif /* CONFIG_ACPI_PROCFS_SLEEP */
#ifdef HAVE_ACPI_LEGACY_ALARM
static const struct file_operations acpi_system_alarm_fops = {
......@@ -506,7 +506,7 @@ static int __init acpi_sleep_proc_init(void)
if (acpi_disabled)
return 0;
#ifdef CONFIG_ACPI_PROCFS
#ifdef CONFIG_ACPI_PROCFS_SLEEP
/* 'sleep' [R/W] */
entry =
create_proc_entry("sleep", S_IFREG | S_IRUGO | S_IWUSR,
......
......@@ -6,3 +6,5 @@ extern void acpi_enable_wakeup_device_prep(u8 sleep_state);
extern void acpi_enable_wakeup_device(u8 sleep_state);
extern void acpi_disable_wakeup_device(u8 sleep_state);
extern void acpi_gpe_sleep_prepare(u32 sleep_state);
extern int acpi_sleep_prepare(u32 acpi_state);
obj-y := shutdown.o
obj-$(CONFIG_PM) += main.o suspend.o resume.o sysfs.o
obj-$(CONFIG_PM_SLEEP) += main.o suspend.o resume.o sysfs.o
obj-$(CONFIG_PM_TRACE) += trace.o
ifeq ($(CONFIG_DEBUG_DRIVER),y)
......
......@@ -5,7 +5,7 @@
extern void device_shutdown(void);
#ifdef CONFIG_PM
#ifdef CONFIG_PM_SLEEP
/*
* main.c
......@@ -62,7 +62,7 @@ extern int resume_device(struct device *);
*/
extern int suspend_device(struct device *, pm_message_t);
#else /* CONFIG_PM */
#else /* CONFIG_PM_SLEEP */
static inline int device_pm_add(struct device * dev)
......
......@@ -366,7 +366,16 @@ acpi_handle acpi_get_child(acpi_handle, acpi_integer);
acpi_handle acpi_get_pci_rootbridge_handle(unsigned int, unsigned int);
#define DEVICE_ACPI_HANDLE(dev) ((acpi_handle)((dev)->archdata.acpi_handle))
#ifdef CONFIG_PM_SLEEP
int acpi_pm_device_sleep_state(struct device *, int, int *);
#else /* !CONFIG_PM_SLEEP */
static inline int acpi_pm_device_sleep_state(struct device *d, int w, int *p)
{
if (p)
*p = ACPI_STATE_D0;
return ACPI_STATE_D3;
}
#endif /* !CONFIG_PM_SLEEP */
#endif /* CONFIG_ACPI */
......
......@@ -147,6 +147,10 @@ static inline void unregister_hotplug_dock_device(acpi_handle handle)
/*--------------------------------------------------------------------------
Suspend/Resume
-------------------------------------------------------------------------- */
#ifdef CONFIG_PM_SLEEP
extern int acpi_sleep_init(void);
#else
static inline int acpi_sleep_init(void) { return 0; }
#endif
#endif /*__ACPI_DRIVERS_H__*/
......@@ -5,7 +5,7 @@
#include <linux/sched.h>
#ifdef CONFIG_PM
#ifdef CONFIG_PM_SLEEP
/*
* Check if a process has been frozen
*/
......@@ -126,7 +126,7 @@ static inline void set_freezable(void)
current->flags &= ~PF_NOFREEZE;
}
#else
#else /* !CONFIG_PM_SLEEP */
static inline int frozen(struct task_struct *p) { return 0; }
static inline int freezing(struct task_struct *p) { return 0; }
static inline void set_freeze_flag(struct task_struct *p) {}
......@@ -143,6 +143,6 @@ static inline void freezer_do_not_count(void) {}
static inline void freezer_count(void) {}
static inline int freezer_should_skip(struct task_struct *p) { return 0; }
static inline void set_freezable(void) {}
#endif
#endif /* !CONFIG_PM_SLEEP */
#endif /* FREEZER_H_INCLUDED */
......@@ -165,6 +165,7 @@ struct pm_ops {
int (*finish)(suspend_state_t state);
};
#ifdef CONFIG_SUSPEND
extern struct pm_ops *pm_ops;
/**
......@@ -193,6 +194,12 @@ extern void arch_suspend_disable_irqs(void);
extern void arch_suspend_enable_irqs(void);
extern int pm_suspend(suspend_state_t state);
#else /* !CONFIG_SUSPEND */
#define suspend_valid_only_mem NULL
static inline void pm_set_ops(struct pm_ops *pm_ops) {}
static inline int pm_suspend(suspend_state_t state) { return -ENOSYS; }
#endif /* !CONFIG_SUSPEND */
/*
* Device power management
......@@ -266,7 +273,7 @@ typedef struct pm_message {
struct dev_pm_info {
pm_message_t power_state;
unsigned can_wakeup:1;
#ifdef CONFIG_PM
#ifdef CONFIG_PM_SLEEP
unsigned should_wakeup:1;
struct list_head entry;
#endif
......@@ -276,7 +283,7 @@ extern int device_power_down(pm_message_t state);
extern void device_power_up(void);
extern void device_resume(void);
#ifdef CONFIG_PM
#ifdef CONFIG_PM_SLEEP
extern int device_suspend(pm_message_t state);
extern int device_prepare_suspend(pm_message_t state);
......@@ -306,7 +313,7 @@ static inline int call_platform_enable_wakeup(struct device *dev, int is_on)
return 0;
}
#else /* !CONFIG_PM */
#else /* !CONFIG_PM_SLEEP */
static inline int device_suspend(pm_message_t state)
{
......@@ -323,7 +330,7 @@ static inline int call_platform_enable_wakeup(struct device *dev, int is_on)
return 0;
}
#endif
#endif /* !CONFIG_PM_SLEEP */
/* changes to device_may_wakeup take effect on the next pm state change.
* by default, devices should wakeup if they can.
......
......@@ -24,7 +24,7 @@ struct pbe {
extern void drain_local_pages(void);
extern void mark_free_pages(struct zone *zone);
#if defined(CONFIG_PM) && defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE)
#if defined(CONFIG_PM_SLEEP) && defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE)
extern int pm_prepare_console(void);
extern void pm_restore_console(void);
#else
......@@ -54,7 +54,6 @@ struct hibernation_ops {
void (*restore_cleanup)(void);
};
#ifdef CONFIG_PM
#ifdef CONFIG_HIBERNATION
/* kernel/power/snapshot.c */
extern void __register_nosave_region(unsigned long b, unsigned long e, int km);
......@@ -82,6 +81,7 @@ static inline void hibernation_set_ops(struct hibernation_ops *ops) {}
static inline int hibernate(void) { return -ENOSYS; }
#endif /* CONFIG_HIBERNATION */
#ifdef CONFIG_PM_SLEEP
void save_processor_state(void);
void restore_processor_state(void);
struct saved_context;
......@@ -106,7 +106,7 @@ static inline int unregister_pm_notifier(struct notifier_block *nb)
{ .notifier_call = fn, .priority = pri }; \
register_pm_notifier(&fn##_nb); \
}
#else /* CONFIG_PM */
#else /* !CONFIG_PM_SLEEP */
static inline int register_pm_notifier(struct notifier_block *nb)
{
......@@ -119,9 +119,9 @@ static inline int unregister_pm_notifier(struct notifier_block *nb)
}
#define pm_notifier(fn, pri) do { (void)(fn); } while (0)
#endif /* CONFIG_PM */
#endif /* !CONFIG_PM_SLEEP */
#if !defined CONFIG_HIBERNATION || !defined(CONFIG_PM)
#ifndef CONFIG_HIBERNATION
static inline void register_nosave_region(unsigned long b, unsigned long e)
{
}
......
......@@ -46,7 +46,7 @@ config PM_VERBOSE
config DISABLE_CONSOLE_SUSPEND
bool "Keep console(s) enabled during suspend/resume (DANGEROUS)"
depends on PM_DEBUG
depends on PM_DEBUG && PM_SLEEP
default n
---help---
This option turns off the console suspend mechanism that prevents
......@@ -57,7 +57,7 @@ config DISABLE_CONSOLE_SUSPEND
config PM_TRACE
bool "Suspend/resume event tracing"
depends on PM_DEBUG && X86 && EXPERIMENTAL
depends on PM_DEBUG && X86 && PM_SLEEP && EXPERIMENTAL
default n
---help---
This enables some cheesy code to save the last PM event point in the
......@@ -72,9 +72,37 @@ config PM_TRACE
CAUTION: this option will cause your machine's real-time clock to be
set to an invalid time after a resume.
config SUSPEND_SMP_POSSIBLE
bool
depends on (X86 && !X86_VOYAGER) || (PPC64 && (PPC_PSERIES || PPC_PMAC))
depends on SMP
default y
config SUSPEND_SMP
bool
depends on SUSPEND_SMP_POSSIBLE && PM_SLEEP
select HOTPLUG_CPU
default y
config PM_SLEEP
bool
depends on SUSPEND || HIBERNATION
default y
config SUSPEND
bool "Suspend to RAM and standby"
depends on PM
depends on !SMP || SUSPEND_SMP_POSSIBLE
default y
---help---
Allow the system to enter sleep states in which main memory is
powered and thus its contents are preserved, such as the
suspend-to-RAM state (i.e. the ACPI S3 state).
config HIBERNATION
bool "Hibernation"
depends on PM && SWAP && (((X86 || PPC64_SWSUSP) && (!SMP || SUSPEND_SMP)) || ((FRV || PPC32) && !SMP))
bool "Hibernation (aka 'suspend to disk')"
depends on PM && SWAP
depends on ((X86 || PPC64_SWSUSP || FRV || PPC32) && !SMP) || SUSPEND_SMP_POSSIBLE
---help---
Enable the suspend to disk (STD) functionality, which is usually
called "hibernation" in user interfaces. STD checkpoints the
......@@ -132,11 +160,6 @@ config PM_STD_PARTITION
suspended image to. It will simply pick the first available swap
device.
config SUSPEND_SMP
bool
depends on HOTPLUG_CPU && (X86 || PPC64) && PM
default y
config APM_EMULATION
tristate "Advanced Power Management Emulation"
depends on PM && SYS_SUPPORTS_APM_EMULATION
......
......@@ -3,8 +3,9 @@ ifeq ($(CONFIG_PM_DEBUG),y)
EXTRA_CFLAGS += -DDEBUG
endif
obj-y := main.o process.o console.o
obj-y := main.o
obj-$(CONFIG_PM_LEGACY) += pm.o
obj-$(CONFIG_PM_SLEEP) += process.o console.o
obj-$(CONFIG_HIBERNATION) += swsusp.o disk.o snapshot.o swap.o user.o
obj-$(CONFIG_MAGIC_SYSRQ) += poweroff.o
......@@ -25,11 +25,13 @@
BLOCKING_NOTIFIER_HEAD(pm_chain_head);
/*This is just an arbitrary number */
#define FREE_PAGE_NUMBER (100)
DEFINE_MUTEX(pm_mutex);
#ifdef CONFIG_SUSPEND
/* This is just an arbitrary number */
#define FREE_PAGE_NUMBER (100)
struct pm_ops *pm_ops;
/**
......@@ -269,6 +271,8 @@ int pm_suspend(suspend_state_t state)
EXPORT_SYMBOL(pm_suspend);
#endif /* CONFIG_SUSPEND */
decl_subsys(power,NULL,NULL);
......@@ -285,13 +289,15 @@ decl_subsys(power,NULL,NULL);
static ssize_t state_show(struct kset *kset, char *buf)
{
char *s = buf;
#ifdef CONFIG_SUSPEND
int i;
char * s = buf;
for (i = 0; i < PM_SUSPEND_MAX; i++) {
if (pm_states[i] && valid_state(i))
s += sprintf(s,"%s ", pm_states[i]);
}
#endif
#ifdef CONFIG_HIBERNATION
s += sprintf(s, "%s\n", "disk");
#else
......@@ -304,11 +310,13 @@ static ssize_t state_show(struct kset *kset, char *buf)
static ssize_t state_store(struct kset *kset, const char *buf, size_t n)
{
#ifdef CONFIG_SUSPEND
suspend_state_t state = PM_SUSPEND_STANDBY;
const char * const *s;
#endif
char *p;
int error;
int len;
int error = -EINVAL;
p = memchr(buf, '\n', n);
len = p ? p - buf : n;
......@@ -316,17 +324,19 @@ static ssize_t state_store(struct kset *kset, const char *buf, size_t n)
/* First, check if we are requested to hibernate */
if (len == 4 && !strncmp(buf, "disk", len)) {
error = hibernate();
return error ? error : n;
goto Exit;
}
#ifdef CONFIG_SUSPEND
for (s = &pm_states[state]; state < PM_SUSPEND_MAX; s++, state++) {
if (*s && len == strlen(*s) && !strncmp(buf, *s, len))
break;
}
if (state < PM_SUSPEND_MAX && *s)
error = enter_state(state);
else
error = -EINVAL;
#endif
Exit:
return error ? error : n;
}
......
......@@ -176,9 +176,17 @@ struct timeval;
extern void swsusp_show_speed(struct timeval *, struct timeval *,
unsigned int, char *);
#ifdef CONFIG_SUSPEND
/* kernel/power/main.c */
extern int suspend_enter(suspend_state_t state);
extern int suspend_devices_and_enter(suspend_state_t state);
#else /* !CONFIG_SUSPEND */
static inline int suspend_devices_and_enter(suspend_state_t state)
{
return -ENOSYS;
}
#endif /* !CONFIG_SUSPEND */
/* kernel/power/common.c */
extern struct blocking_notifier_head pm_chain_head;
static inline int pm_notifier_call_chain(unsigned long val)
......
......@@ -726,7 +726,7 @@ static void __drain_pages(unsigned int cpu)
}
}
#ifdef CONFIG_PM
#ifdef CONFIG_HIBERNATION
void mark_free_pages(struct zone *zone)
{
......@@ -772,7 +772,7 @@ void drain_local_pages(void)
__drain_pages(smp_processor_id());
local_irq_restore(flags);
}
#endif /* CONFIG_PM */
#endif /* CONFIG_HIBERNATION */
/*
* Free a 0-order page
......
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