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Power management updates for 3.6

Browse source 
* ACPI conversion to PM handling based on struct dev_pm_ops.
 * Conversion of a number of platform drivers to PM handling based on struct
   dev_pm_ops and removal of empty legacy PM callbacks from a couple of PCI
   drivers.
 * Suspend-to-both for in-kernel hibernation from Bojan Smojver.
 * cpuidle fixes and cleanups from ShuoX Liu, Daniel Lezcano and Preeti U Murthy.
 * cpufreq bug fixes from Jonghwa Lee and Stephen Boyd.
 * Suspend and hibernate fixes from Srivatsa S. Bhat and Colin Cross.
 * Generic PM domains framework updates.
 * RTC CMOS wakeup signaling update from Paul Fox.
 * sparse warnings fixes from Sachin Kamat.
 * Build warnings fixes for the generic PM domains framework and PM sysfs code.
 * sysfs switch for printing device suspend times from Sameer Nanda.
 * Documentation fix from Oskar Schirmer.
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Merge tag 'pm-for-3.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management updates from Rafael Wysocki:

 - ACPI conversion to PM handling based on struct dev_pm_ops.
 - Conversion of a number of platform drivers to PM handling based on
   struct dev_pm_ops and removal of empty legacy PM callbacks from a
   couple of PCI drivers.
 - Suspend-to-both for in-kernel hibernation from Bojan Smojver.
 - cpuidle fixes and cleanups from ShuoX Liu, Daniel Lezcano and Preeti
   Murthy.
 - cpufreq bug fixes from Jonghwa Lee and Stephen Boyd.
 - Suspend and hibernate fixes from Srivatsa Bhat and Colin Cross.
 - Generic PM domains framework updates.
 - RTC CMOS wakeup signaling update from Paul Fox.
 - sparse warnings fixes from Sachin Kamat.
 - Build warnings fixes for the generic PM domains framework and PM
   sysfs code.
 - sysfs switch for printing device suspend times from Sameer Nanda.
 - Documentation fix from Oskar Schirmer.

* tag 'pm-for-3.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (70 commits)
  cpufreq: Fix sysfs deadlock with concurrent hotplug/frequency switch
  EXYNOS: bugfix on retrieving old_index from freqs.old
  PM / Sleep: call early resume handlers when suspend_noirq fails
  PM / QoS: Use NULL pointer instead of plain integer in qos.c
  PM / QoS: Use NULL pointer instead of plain integer in pm_qos.h
  PM / Sleep: Require CAP_BLOCK_SUSPEND to use wake_lock/wake_unlock
  PM / Sleep: Add missing static storage class specifiers in main.c
  cpuilde / ACPI: remove time from acpi_processor_cx structure
  cpuidle / ACPI: remove usage from acpi_processor_cx structure
  cpuidle / ACPI : remove latency_ticks from acpi_processor_cx structure
  rtc-cmos: report wakeups from interrupt handler
  PM / Sleep: Fix build warning in sysfs.c for CONFIG_PM_SLEEP unset
  PM / Domains: Fix build warning for CONFIG_PM_RUNTIME unset
  olpc-xo15-sci: Use struct dev_pm_ops for power management
  PM / Domains: Replace plain integer with NULL pointer in domain.c file
  PM / Domains: Add missing static storage class specifier in domain.c file
  PM / crypto / ux500: Use struct dev_pm_ops for power management
  PM / IPMI: Remove empty legacy PCI PM callbacks
  tpm_nsc: Use struct dev_pm_ops for power management
  tpm_tis: Use struct dev_pm_ops for power management
  ...
This commit is contained in:
Linus Torvalds 2012-07-22 13:36:52 -07:00
commit 7100e505b7
65 changed files with 887 additions and 479 deletions
Download patch file Download diff file Expand all files Collapse all files

4
kernel/power/Kconfig
View file

@ -175,7 +175,7 @@ config PM_TEST_SUSPEND
You probably want to have your system's RTC driver statically
linked, ensuring that it's available when this test runs.
config CAN_PM_TRACE
config PM_SLEEP_DEBUG
def_bool y
depends on PM_DEBUG && PM_SLEEP
@ -196,7 +196,7 @@ config PM_TRACE
config PM_TRACE_RTC
bool "Suspend/resume event tracing"
depends on CAN_PM_TRACE
depends on PM_SLEEP_DEBUG
depends on X86
select PM_TRACE
---help---

42
kernel/power/hibernate.c
View file

@ -5,6 +5,7 @@
* Copyright (c) 2003 Open Source Development Lab
* Copyright (c) 2004 Pavel Machek <pavel@ucw.cz>
* Copyright (c) 2009 Rafael J. Wysocki, Novell Inc.
* Copyright (C) 2012 Bojan Smojver <bojan@rexursive.com>
*
* This file is released under the GPLv2.
*/
@ -45,6 +46,9 @@ enum {
HIBERNATION_PLATFORM,
HIBERNATION_SHUTDOWN,
HIBERNATION_REBOOT,
#ifdef CONFIG_SUSPEND
HIBERNATION_SUSPEND,
#endif
/* keep last */
__HIBERNATION_AFTER_LAST
};
@ -353,6 +357,7 @@ int hibernation_snapshot(int platform_mode)
}
suspend_console();
ftrace_stop();
pm_restrict_gfp_mask();
error = dpm_suspend(PMSG_FREEZE);
@ -378,6 +383,7 @@ int hibernation_snapshot(int platform_mode)
if (error || !in_suspend)
pm_restore_gfp_mask();
ftrace_start();
resume_console();
dpm_complete(msg);
@ -480,6 +486,7 @@ int hibernation_restore(int platform_mode)
pm_prepare_console();
suspend_console();
ftrace_stop();
pm_restrict_gfp_mask();
error = dpm_suspend_start(PMSG_QUIESCE);
if (!error) {
@ -487,6 +494,7 @@ int hibernation_restore(int platform_mode)
dpm_resume_end(PMSG_RECOVER);
}
pm_restore_gfp_mask();
ftrace_start();
resume_console();
pm_restore_console();
return error;
@ -513,6 +521,7 @@ int hibernation_platform_enter(void)
entering_platform_hibernation = true;
suspend_console();
ftrace_stop();
error = dpm_suspend_start(PMSG_HIBERNATE);
if (error) {
if (hibernation_ops->recover)
@ -556,6 +565,7 @@ int hibernation_platform_enter(void)
Resume_devices:
entering_platform_hibernation = false;
dpm_resume_end(PMSG_RESTORE);
ftrace_start();
resume_console();
Close:
@ -573,6 +583,10 @@ int hibernation_platform_enter(void)
*/
static void power_down(void)
{
#ifdef CONFIG_SUSPEND
int error;
#endif
switch (hibernation_mode) {
case HIBERNATION_REBOOT:
kernel_restart(NULL);
@ -582,6 +596,25 @@ static void power_down(void)
case HIBERNATION_SHUTDOWN:
kernel_power_off();
break;
#ifdef CONFIG_SUSPEND
case HIBERNATION_SUSPEND:
error = suspend_devices_and_enter(PM_SUSPEND_MEM);
if (error) {
if (hibernation_ops)
hibernation_mode = HIBERNATION_PLATFORM;
else
hibernation_mode = HIBERNATION_SHUTDOWN;
power_down();
}
/*
* Restore swap signature.
*/
error = swsusp_unmark();
if (error)
printk(KERN_ERR "PM: Swap will be unusable! "
"Try swapon -a.\n");
return;
#endif
}
kernel_halt();
/*
@ -819,6 +852,9 @@ static const char * const hibernation_modes[] = {
[HIBERNATION_PLATFORM] = "platform",
[HIBERNATION_SHUTDOWN] = "shutdown",
[HIBERNATION_REBOOT] = "reboot",
#ifdef CONFIG_SUSPEND
[HIBERNATION_SUSPEND] = "suspend",
#endif
};
/*
@ -859,6 +895,9 @@ static ssize_t disk_show(struct kobject *kobj, struct kobj_attribute *attr,
switch (i) {
case HIBERNATION_SHUTDOWN:
case HIBERNATION_REBOOT:
#ifdef CONFIG_SUSPEND
case HIBERNATION_SUSPEND:
#endif
break;
case HIBERNATION_PLATFORM:
if (hibernation_ops)
@ -899,6 +938,9 @@ static ssize_t disk_store(struct kobject *kobj, struct kobj_attribute *attr,
switch (mode) {
case HIBERNATION_SHUTDOWN:
case HIBERNATION_REBOOT:
#ifdef CONFIG_SUSPEND
case HIBERNATION_SUSPEND:
#endif
hibernation_mode = mode;
break;
case HIBERNATION_PLATFORM:

45
kernel/power/main.c
View file

@ -235,6 +235,47 @@ late_initcall(pm_debugfs_init);
#endif /* CONFIG_PM_SLEEP */
#ifdef CONFIG_PM_SLEEP_DEBUG
/*
* pm_print_times: print time taken by devices to suspend and resume.
*
* show() returns whether printing of suspend and resume times is enabled.
* store() accepts 0 or 1. 0 disables printing and 1 enables it.
*/
bool pm_print_times_enabled;
static ssize_t pm_print_times_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
return sprintf(buf, "%d\n", pm_print_times_enabled);
}
static ssize_t pm_print_times_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t n)
{
unsigned long val;
if (kstrtoul(buf, 10, &val))
return -EINVAL;
if (val > 1)
return -EINVAL;
pm_print_times_enabled = !!val;
return n;
}
power_attr(pm_print_times);
static inline void pm_print_times_init(void)
{
pm_print_times_enabled = !!initcall_debug;
}
#else /* !CONFIG_PP_SLEEP_DEBUG */
static inline void pm_print_times_init(void) {}
#endif /* CONFIG_PM_SLEEP_DEBUG */
struct kobject *power_kobj;
/**
@ -531,6 +572,9 @@ static struct attribute * g[] = {
#ifdef CONFIG_PM_DEBUG
&pm_test_attr.attr,
#endif
#ifdef CONFIG_PM_SLEEP_DEBUG
&pm_print_times_attr.attr,
#endif
#endif
NULL,
};
@ -566,6 +610,7 @@ static int __init pm_init(void)
error = sysfs_create_group(power_kobj, &attr_group);
if (error)
return error;
pm_print_times_init();
return pm_autosleep_init();
}

3
kernel/power/power.h
View file

@ -156,6 +156,9 @@ extern void swsusp_free(void);
extern int swsusp_read(unsigned int *flags_p);
extern int swsusp_write(unsigned int flags);
extern void swsusp_close(fmode_t);
#ifdef CONFIG_SUSPEND
extern int swsusp_unmark(void);
#endif
/* kernel/power/block_io.c */
extern struct block_device *hib_resume_bdev;

3
kernel/power/suspend.c
View file

@ -24,6 +24,7 @@
#include <linux/export.h>
#include <linux/suspend.h>
#include <linux/syscore_ops.h>
#include <linux/ftrace.h>
#include <trace/events/power.h>
#include "power.h"
@ -212,6 +213,7 @@ int suspend_devices_and_enter(suspend_state_t state)
goto Close;
}
suspend_console();
ftrace_stop();
suspend_test_start();
error = dpm_suspend_start(PMSG_SUSPEND);
if (error) {
@ -231,6 +233,7 @@ int suspend_devices_and_enter(suspend_state_t state)
suspend_test_start();
dpm_resume_end(PMSG_RESUME);
suspend_test_finish("resume devices");
ftrace_start();
resume_console();
Close:
if (suspend_ops->end)

82
kernel/power/swap.c
View file

@ -448,9 +448,9 @@ static int save_image(struct swap_map_handle *handle,
struct timeval start;
struct timeval stop;
printk(KERN_INFO "PM: Saving image data pages (%u pages) ... ",
printk(KERN_INFO "PM: Saving image data pages (%u pages)...\n",
nr_to_write);
m = nr_to_write / 100;
m = nr_to_write / 10;
if (!m)
m = 1;
nr_pages = 0;
@ -464,7 +464,8 @@ static int save_image(struct swap_map_handle *handle,
if (ret)
break;
if (!(nr_pages % m))
printk(KERN_CONT "\b\b\b\b%3d%%", nr_pages / m);
printk(KERN_INFO "PM: Image saving progress: %3d%%\n",
nr_pages / m * 10);
nr_pages++;
}
err2 = hib_wait_on_bio_chain(&bio);
@ -472,9 +473,7 @@ static int save_image(struct swap_map_handle *handle,
if (!ret)
ret = err2;
if (!ret)
printk(KERN_CONT "\b\b\b\bdone\n");
else
printk(KERN_CONT "\n");
printk(KERN_INFO "PM: Image saving done.\n");
swsusp_show_speed(&start, &stop, nr_to_write, "Wrote");
return ret;
}
@ -668,9 +667,9 @@ static int save_image_lzo(struct swap_map_handle *handle,
printk(KERN_INFO
"PM: Using %u thread(s) for compression.\n"
"PM: Compressing and saving image data (%u pages) ... ",
"PM: Compressing and saving image data (%u pages)...\n",
nr_threads, nr_to_write);
m = nr_to_write / 100;
m = nr_to_write / 10;
if (!m)
m = 1;
nr_pages = 0;
@ -690,8 +689,10 @@ static int save_image_lzo(struct swap_map_handle *handle,
data_of(*snapshot), PAGE_SIZE);
if (!(nr_pages % m))
printk(KERN_CONT "\b\b\b\b%3d%%",
nr_pages / m);
printk(KERN_INFO
"PM: Image saving progress: "
"%3d%%\n",
nr_pages / m * 10);
nr_pages++;
}
if (!off)
@ -761,11 +762,8 @@ out_finish:
do_gettimeofday(&stop);
if (!ret)
ret = err2;
if (!ret) {
printk(KERN_CONT "\b\b\b\bdone\n");
} else {
printk(KERN_CONT "\n");
}
if (!ret)
printk(KERN_INFO "PM: Image saving done.\n");
swsusp_show_speed(&start, &stop, nr_to_write, "Wrote");
out_clean:
if (crc) {
@ -973,9 +971,9 @@ static int load_image(struct swap_map_handle *handle,
int err2;
unsigned nr_pages;
printk(KERN_INFO "PM: Loading image data pages (%u pages) ... ",
printk(KERN_INFO "PM: Loading image data pages (%u pages)...\n",
nr_to_read);
m = nr_to_read / 100;
m = nr_to_read / 10;
if (!m)
m = 1;
nr_pages = 0;
@ -993,7 +991,8 @@ static int load_image(struct swap_map_handle *handle,
if (ret)
break;
if (!(nr_pages % m))
printk("\b\b\b\b%3d%%", nr_pages / m);
printk(KERN_INFO "PM: Image loading progress: %3d%%\n",
nr_pages / m * 10);
nr_pages++;
}
err2 = hib_wait_on_bio_chain(&bio);
@ -1001,12 +1000,11 @@ static int load_image(struct swap_map_handle *handle,
if (!ret)
ret = err2;
if (!ret) {
printk("\b\b\b\bdone\n");
printk(KERN_INFO "PM: Image loading done.\n");
snapshot_write_finalize(snapshot);
if (!snapshot_image_loaded(snapshot))
ret = -ENODATA;
} else
printk("\n");
}
swsusp_show_speed(&start, &stop, nr_to_read, "Read");
return ret;
}
@ -1185,9 +1183,9 @@ static int load_image_lzo(struct swap_map_handle *handle,
printk(KERN_INFO
"PM: Using %u thread(s) for decompression.\n"
"PM: Loading and decompressing image data (%u pages) ... ",
"PM: Loading and decompressing image data (%u pages)...\n",
nr_threads, nr_to_read);
m = nr_to_read / 100;
m = nr_to_read / 10;
if (!m)
m = 1;
nr_pages = 0;
@ -1319,7 +1317,10 @@ static int load_image_lzo(struct swap_map_handle *handle,
data[thr].unc + off, PAGE_SIZE);
if (!(nr_pages % m))
printk("\b\b\b\b%3d%%", nr_pages / m);
printk(KERN_INFO
"PM: Image loading progress: "
"%3d%%\n",
nr_pages / m * 10);
nr_pages++;
ret = snapshot_write_next(snapshot);
@ -1344,7 +1345,7 @@ out_finish:
}
do_gettimeofday(&stop);
if (!ret) {
printk("\b\b\b\bdone\n");
printk(KERN_INFO "PM: Image loading done.\n");
snapshot_write_finalize(snapshot);
if (!snapshot_image_loaded(snapshot))
ret = -ENODATA;
@ -1357,8 +1358,7 @@ out_finish:
}
}
}
} else
printk("\n");
}
swsusp_show_speed(&start, &stop, nr_to_read, "Read");
out_clean:
for (i = 0; i < ring_size; i++)
@ -1472,6 +1472,34 @@ void swsusp_close(fmode_t mode)
blkdev_put(hib_resume_bdev, mode);
}
/**
* swsusp_unmark - Unmark swsusp signature in the resume device
*/
#ifdef CONFIG_SUSPEND
int swsusp_unmark(void)
{
int error;
hib_bio_read_page(swsusp_resume_block, swsusp_header, NULL);
if (!memcmp(HIBERNATE_SIG,swsusp_header->sig, 10)) {
memcpy(swsusp_header->sig,swsusp_header->orig_sig, 10);
error = hib_bio_write_page(swsusp_resume_block,
swsusp_header, NULL);
} else {
printk(KERN_ERR "PM: Cannot find swsusp signature!\n");
error = -ENODEV;
}
/*
* We just returned from suspend, we don't need the image any more.
*/
free_all_swap_pages(root_swap);
return error;
}
#endif
static int swsusp_header_init(void)
{
swsusp_header = (struct swsusp_header*) __get_free_page(GFP_KERNEL);

7
kernel/power/wakelock.c
View file

@ -9,6 +9,7 @@
* manipulate wakelocks on Android.
*/
#include <linux/capability.h>
#include <linux/ctype.h>
#include <linux/device.h>
#include <linux/err.h>
@ -188,6 +189,9 @@ int pm_wake_lock(const char *buf)
size_t len;
int ret = 0;
if (!capable(CAP_BLOCK_SUSPEND))
return -EPERM;
while (*str && !isspace(*str))
str++;
@ -231,6 +235,9 @@ int pm_wake_unlock(const char *buf)
size_t len;
int ret = 0;
if (!capable(CAP_BLOCK_SUSPEND))
return -EPERM;
len = strlen(buf);
if (!len)
return -EINVAL;