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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6

Browse Source 
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6:
  PM: Add empty suspend/resume device irq functions
  PM/Hibernate: Move NVS routines into a seperate file (v2).
  PM/Hibernate: Rename disk.c to hibernate.c
  PM: Separate suspend to RAM functionality from core
  Driver Core: Rework platform suspend/resume, print warning
  PM: Remove device_type suspend()/resume()
  PM/Hibernate: Move memory shrinking to snapshot.c (rev. 2)
  PM/Suspend: Do not shrink memory before suspend
  PM: Remove bus_type suspend_late()/resume_early() V2
  PM core: rename suspend and resume functions
  PM: Rename device_power_down/up()
  PM: Remove unused asm/suspend.h
  x86: unify power/cpu_(32|64).c
  x86: unify power/cpu_(32|64) copyright notes
  x86: unify power/cpu_(32|64) regarding restoring processor state
  x86: unify power/cpu_(32|64) regarding saving processor state
  x86: unify power/cpu_(32|64) global variables
  x86: unify power/cpu_(32|64) headers
  PM: Warn if interrupts are enabled during suspend-resume of sysdevs
  PM/ACPI/x86: Fix sparse warning in arch/x86/kernel/acpi/sleep.c
This commit is contained in:
Linus Torvalds
2009-06-12 13:17:27 -07:00
parent c53567ad45 5818a6e251
commit 947ec0b0c1
33 changed files with 984 additions and 1122 deletions
Download Patch File Download Diff File Expand all files Collapse all files
Documentation/power/devices.txt
+5 -29
View File
@@ -75,9 +75,6 @@ may need to apply in domain-specific ways to their devices:
struct bus_type {
...
int (*suspend)(struct device *dev, pm_message_t state);
int (*suspend_late)(struct device *dev, pm_message_t state);
int (*resume_early)(struct device *dev);
int (*resume)(struct device *dev);
};
@@ -226,20 +223,7 @@ The phases are seen by driver notifications issued in this order:
This call should handle parts of device suspend logic that require
sleeping. It probably does work to quiesce the device which hasn't
been abstracted into class.suspend() or bus.suspend_late().
3 bus.suspend_late(dev, message) is called with IRQs disabled, and
with only one CPU active. Until the bus.resume_early() phase
completes (see later), IRQs are not enabled again. This method
won't be exposed by all busses; for message based busses like USB,
I2C, or SPI, device interactions normally require IRQs. This bus
call may be morphed into a driver call with bus-specific parameters.
This call might save low level hardware state that might otherwise
be lost in the upcoming low power state, and actually put the
device into a low power state ... so that in some cases the device
may stay partly usable until this late. This "late" call may also
help when coping with hardware that behaves badly.
been abstracted into class.suspend().
The pm_message_t parameter is currently used to refine those semantics
(described later).
@@ -351,19 +335,11 @@ devices processing each phase's calls before the next phase begins.
The phases are seen by driver notifications issued in this order:
1 bus.resume_early(dev) is called with IRQs disabled, and with
only one CPU active. As with bus.suspend_late(), this method
won't be supported on busses that require IRQs in order to
interact with devices.
1 bus.resume(dev) reverses the effects of bus.suspend(). This may
be morphed into a device driver call with bus-specific parameters;
implementations may sleep.
This reverses the effects of bus.suspend_late().
2 bus.resume(dev) is called next. This may be morphed into a device
driver call with bus-specific parameters; implementations may sleep.
This reverses the effects of bus.suspend().
3 class.resume(dev) is called for devices associated with a class
2 class.resume(dev) is called for devices associated with a class
that has such a method. Implementations may sleep.
This reverses the effects of class.suspend(), and would usually
arch/alpha/include/asm/suspend.h
-6
View File
@@ -1,6 +0,0 @@
#ifndef __ALPHA_SUSPEND_H
#define __ALPHA_SUSPEND_H
/* Dummy include. */
#endif /* __ALPHA_SUSPEND_H */
arch/arm/include/asm/suspend.h
-4
View File
@@ -1,4 +0,0 @@
#ifndef _ASMARM_SUSPEND_H
#define _ASMARM_SUSPEND_H
#endif
arch/ia64/include/asm/suspend.h
-1
View File
@@ -1 +0,0 @@
/* dummy (must be non-empty to prevent prejudicial removal...) */
arch/m68k/include/asm/suspend.h
-6
View File
@@ -1,6 +0,0 @@
#ifndef _M68K_SUSPEND_H
#define _M68K_SUSPEND_H
/* Dummy include. */
#endif /* _M68K_SUSPEND_H */
arch/mips/include/asm/suspend.h
-6
View File
@@ -1,6 +0,0 @@
#ifndef __ASM_SUSPEND_H
#define __ASM_SUSPEND_H
/* Somewhen... Maybe :-) */
#endif /* __ASM_SUSPEND_H */
arch/s390/include/asm/suspend.h
-5
View File
@@ -1,5 +0,0 @@
#ifndef __ASM_S390_SUSPEND_H
#define __ASM_S390_SUSPEND_H
#endif
arch/um/include/asm/suspend.h
-4
View File
@@ -1,4 +0,0 @@
#ifndef __UM_SUSPEND_H
#define __UM_SUSPEND_H
#endif
arch/x86/kernel/acpi/sleep.c
+1 -1
View File
@@ -104,7 +104,7 @@ int acpi_save_state_mem(void)
initial_gs = per_cpu_offset(smp_processor_id());
#endif
initial_code = (unsigned long)wakeup_long64;
saved_magic = 0x123456789abcdef0;
saved_magic = 0x123456789abcdef0L;
#endif /* CONFIG_64BIT */
return 0;
arch/x86/kernel/apm_32.c
+7 -7
View File
@@ -1233,9 +1233,9 @@ static int suspend(int vetoable)
int err;
struct apm_user *as;
device_suspend(PMSG_SUSPEND);
dpm_suspend_start(PMSG_SUSPEND);
device_power_down(PMSG_SUSPEND);
dpm_suspend_noirq(PMSG_SUSPEND);
local_irq_disable();
sysdev_suspend(PMSG_SUSPEND);
@@ -1259,9 +1259,9 @@ static int suspend(int vetoable)
sysdev_resume();
local_irq_enable();
device_power_up(PMSG_RESUME);
dpm_resume_noirq(PMSG_RESUME);
device_resume(PMSG_RESUME);
dpm_resume_end(PMSG_RESUME);
queue_event(APM_NORMAL_RESUME, NULL);
spin_lock(&user_list_lock);
for (as = user_list; as != NULL; as = as->next) {
@@ -1277,7 +1277,7 @@ static void standby(void)
{
int err;
device_power_down(PMSG_SUSPEND);
dpm_suspend_noirq(PMSG_SUSPEND);
local_irq_disable();
sysdev_suspend(PMSG_SUSPEND);
@@ -1291,7 +1291,7 @@ static void standby(void)
sysdev_resume();
local_irq_enable();
device_power_up(PMSG_RESUME);
dpm_resume_noirq(PMSG_RESUME);
}
static apm_event_t get_event(void)
@@ -1376,7 +1376,7 @@ static void check_events(void)
ignore_bounce = 1;
if ((event != APM_NORMAL_RESUME)
|| (ignore_normal_resume == 0)) {
device_resume(PMSG_RESUME);
dpm_resume_end(PMSG_RESUME);
queue_event(event, NULL);
}
ignore_normal_resume = 0;
arch/x86/power/Makefile
+1 -1
View File
@@ -3,5 +3,5 @@
nostackp := $(call cc-option, -fno-stack-protector)
CFLAGS_cpu_$(BITS).o := $(nostackp)
obj-$(CONFIG_PM_SLEEP) += cpu_$(BITS).o
obj-$(CONFIG_PM_SLEEP) += cpu.o
obj-$(CONFIG_HIBERNATION) += hibernate_$(BITS).o hibernate_asm_$(BITS).o
arch/x86/power/cpu_64.c → arch/x86/power/cpu.c
+125 -40
View File
@@ -1,5 +1,5 @@
/*
* Suspend and hibernation support for x86-64
* Suspend support specific for i386/x86-64.
*
* Distribute under GPLv2
*
@@ -8,18 +8,28 @@
* Copyright (c) 2001 Patrick Mochel <mochel@osdl.org>
*/
#include <linux/smp.h>
#include <linux/suspend.h>
#include <asm/proto.h>
#include <asm/page.h>
#include <linux/smp.h>
#include <asm/pgtable.h>
#include <asm/proto.h>
#include <asm/mtrr.h>
#include <asm/page.h>
#include <asm/mce.h>
#include <asm/xcr.h>
#include <asm/suspend.h>
static void fix_processor_context(void);
#ifdef CONFIG_X86_32
static struct saved_context saved_context;
unsigned long saved_context_ebx;
unsigned long saved_context_esp, saved_context_ebp;
unsigned long saved_context_esi, saved_context_edi;
unsigned long saved_context_eflags;
#else
/* CONFIG_X86_64 */
struct saved_context saved_context;
#endif
/**
* __save_processor_state - save CPU registers before creating a
@@ -38,19 +48,35 @@ struct saved_context saved_context;
*/
static void __save_processor_state(struct saved_context *ctxt)
{
#ifdef CONFIG_X86_32
mtrr_save_fixed_ranges(NULL);
#endif
kernel_fpu_begin();
/*
* descriptor tables
*/
#ifdef CONFIG_X86_32
store_gdt(&ctxt->gdt);
store_idt(&ctxt->idt);
#else
/* CONFIG_X86_64 */
store_gdt((struct desc_ptr *)&ctxt->gdt_limit);
store_idt((struct desc_ptr *)&ctxt->idt_limit);
#endif
store_tr(ctxt->tr);
/* XMM0..XMM15 should be handled by kernel_fpu_begin(). */
/*
* segment registers
*/
#ifdef CONFIG_X86_32
savesegment(es, ctxt->es);
savesegment(fs, ctxt->fs);
savesegment(gs, ctxt->gs);
savesegment(ss, ctxt->ss);
#else
/* CONFIG_X86_64 */
asm volatile ("movw %%ds, %0" : "=m" (ctxt->ds));
asm volatile ("movw %%es, %0" : "=m" (ctxt->es));
asm volatile ("movw %%fs, %0" : "=m" (ctxt->fs));
@@ -62,30 +88,87 @@ static void __save_processor_state(struct saved_context *ctxt)
rdmsrl(MSR_KERNEL_GS_BASE, ctxt->gs_kernel_base);
mtrr_save_fixed_ranges(NULL);
rdmsrl(MSR_EFER, ctxt->efer);
#endif
/*
* control registers
*/
rdmsrl(MSR_EFER, ctxt->efer);
ctxt->cr0 = read_cr0();
ctxt->cr2 = read_cr2();
ctxt->cr3 = read_cr3();
#ifdef CONFIG_X86_32
ctxt->cr4 = read_cr4_safe();
#else
/* CONFIG_X86_64 */
ctxt->cr4 = read_cr4();
ctxt->cr8 = read_cr8();
#endif
}
/* Needed by apm.c */
void save_processor_state(void)
{
__save_processor_state(&saved_context);
}
#ifdef CONFIG_X86_32
EXPORT_SYMBOL(save_processor_state);
#endif
static void do_fpu_end(void)
{
/*
* Restore FPU regs if necessary
* Restore FPU regs if necessary.
*/
kernel_fpu_end();
}
static void fix_processor_context(void)
{
int cpu = smp_processor_id();
struct tss_struct *t = &per_cpu(init_tss, cpu);
set_tss_desc(cpu, t); /*
* This just modifies memory; should not be
* necessary. But... This is necessary, because
* 386 hardware has concept of busy TSS or some
* similar stupidity.
*/
#ifdef CONFIG_X86_64
get_cpu_gdt_table(cpu)[GDT_ENTRY_TSS].type = 9;
syscall_init(); /* This sets MSR_*STAR and related */
#endif
load_TR_desc(); /* This does ltr */
load_LDT(&current->active_mm->context); /* This does lldt */
/*
* Now maybe reload the debug registers
*/
if (current->thread.debugreg7) {
#ifdef CONFIG_X86_32
set_debugreg(current->thread.debugreg0, 0);
set_debugreg(current->thread.debugreg1, 1);
set_debugreg(current->thread.debugreg2, 2);
set_debugreg(current->thread.debugreg3, 3);
/* no 4 and 5 */
set_debugreg(current->thread.debugreg6, 6);
set_debugreg(current->thread.debugreg7, 7);
#else
/* CONFIG_X86_64 */
loaddebug(&current->thread, 0);
loaddebug(&current->thread, 1);
loaddebug(&current->thread, 2);
loaddebug(&current->thread, 3);
/* no 4 and 5 */
loaddebug(&current->thread, 6);
loaddebug(&current->thread, 7);
#endif
}
}
/**
* __restore_processor_state - restore the contents of CPU registers saved
* by __save_processor_state()
@@ -96,9 +179,16 @@ static void __restore_processor_state(struct saved_context *ctxt)
/*
* control registers
*/
/* cr4 was introduced in the Pentium CPU */
#ifdef CONFIG_X86_32
if (ctxt->cr4)
write_cr4(ctxt->cr4);
#else
/* CONFIG X86_64 */
wrmsrl(MSR_EFER, ctxt->efer);
write_cr8(ctxt->cr8);
write_cr4(ctxt->cr4);
#endif
write_cr3(ctxt->cr3);
write_cr2(ctxt->cr2);
write_cr0(ctxt->cr0);
@@ -107,13 +197,31 @@ static void __restore_processor_state(struct saved_context *ctxt)
* now restore the descriptor tables to their proper values
* ltr is done i fix_processor_context().
*/
#ifdef CONFIG_X86_32
load_gdt(&ctxt->gdt);
load_idt(&ctxt->idt);
#else
/* CONFIG_X86_64 */
load_gdt((const struct desc_ptr *)&ctxt->gdt_limit);
load_idt((const struct desc_ptr *)&ctxt->idt_limit);
#endif
/*
* segment registers
*/
#ifdef CONFIG_X86_32
loadsegment(es, ctxt->es);
loadsegment(fs, ctxt->fs);
loadsegment(gs, ctxt->gs);
loadsegment(ss, ctxt->ss);
/*
* sysenter MSRs
*/
if (boot_cpu_has(X86_FEATURE_SEP))
enable_sep_cpu();
#else
/* CONFIG_X86_64 */
asm volatile ("movw %0, %%ds" :: "r" (ctxt->ds));
asm volatile ("movw %0, %%es" :: "r" (ctxt->es));
asm volatile ("movw %0, %%fs" :: "r" (ctxt->fs));
@@ -123,6 +231,7 @@ static void __restore_processor_state(struct saved_context *ctxt)
wrmsrl(MSR_FS_BASE, ctxt->fs_base);
wrmsrl(MSR_GS_BASE, ctxt->gs_base);
wrmsrl(MSR_KERNEL_GS_BASE, ctxt->gs_kernel_base);
#endif
/*
* restore XCR0 for xsave capable cpu's.
@@ -134,41 +243,17 @@ static void __restore_processor_state(struct saved_context *ctxt)
do_fpu_end();
mtrr_ap_init();
#ifdef CONFIG_X86_32
mcheck_init(&boot_cpu_data);
#endif
}
/* Needed by apm.c */
void restore_processor_state(void)
{
__restore_processor_state(&saved_context);
}
static void fix_processor_context(void)
{
int cpu = smp_processor_id();
struct tss_struct *t = &per_cpu(init_tss, cpu);
/*
* This just modifies memory; should not be necessary. But... This
* is necessary, because 386 hardware has concept of busy TSS or some
* similar stupidity.
*/
set_tss_desc(cpu, t);
get_cpu_gdt_table(cpu)[GDT_ENTRY_TSS].type = 9;
syscall_init(); /* This sets MSR_*STAR and related */
load_TR_desc(); /* This does ltr */
load_LDT(&current->active_mm->context); /* This does lldt */
/*
* Now maybe reload the debug registers
*/
if (current->thread.debugreg7){
loaddebug(&current->thread, 0);
loaddebug(&current->thread, 1);
loaddebug(&current->thread, 2);
loaddebug(&current->thread, 3);
/* no 4 and 5 */
loaddebug(&current->thread, 6);
loaddebug(&current->thread, 7);
}
}
#ifdef CONFIG_X86_32
EXPORT_SYMBOL(restore_processor_state);
#endif
arch/x86/power/cpu_32.c
-148
View File
@@ -1,148 +0,0 @@
/*
* Suspend support specific for i386.
*
* Distribute under GPLv2
*
* Copyright (c) 2002 Pavel Machek <pavel@suse.cz>
* Copyright (c) 2001 Patrick Mochel <mochel@osdl.org>
*/
#include <linux/module.h>
#include <linux/suspend.h>
#include <asm/mtrr.h>
#include <asm/mce.h>
#include <asm/xcr.h>
#include <asm/suspend.h>
static struct saved_context saved_context;
unsigned long saved_context_ebx;
unsigned long saved_context_esp, saved_context_ebp;
unsigned long saved_context_esi, saved_context_edi;
unsigned long saved_context_eflags;
static void __save_processor_state(struct saved_context *ctxt)
{
mtrr_save_fixed_ranges(NULL);
kernel_fpu_begin();
/*
* descriptor tables
*/
store_gdt(&ctxt->gdt);
store_idt(&ctxt->idt);
store_tr(ctxt->tr);
/*
* segment registers
*/
savesegment(es, ctxt->es);
savesegment(fs, ctxt->fs);
savesegment(gs, ctxt->gs);
savesegment(ss, ctxt->ss);
/*
* control registers
*/
ctxt->cr0 = read_cr0();
ctxt->cr2 = read_cr2();
ctxt->cr3 = read_cr3();
ctxt->cr4 = read_cr4_safe();
}
/* Needed by apm.c */
void save_processor_state(void)
{
__save_processor_state(&saved_context);
}
EXPORT_SYMBOL(save_processor_state);
static void do_fpu_end(void)
{
/*
* Restore FPU regs if necessary.
*/
kernel_fpu_end();
}
static void fix_processor_context(void)
{
int cpu = smp_processor_id();
struct tss_struct *t = &per_cpu(init_tss, cpu);
set_tss_desc(cpu, t); /*
* This just modifies memory; should not be
* necessary. But... This is necessary, because
* 386 hardware has concept of busy TSS or some
* similar stupidity.
*/
load_TR_desc(); /* This does ltr */
load_LDT(&current->active_mm->context); /* This does lldt */
/*
* Now maybe reload the debug registers
*/
if (current->thread.debugreg7) {
set_debugreg(current->thread.debugreg0, 0);
set_debugreg(current->thread.debugreg1, 1);
set_debugreg(current->thread.debugreg2, 2);
set_debugreg(current->thread.debugreg3, 3);
/* no 4 and 5 */
set_debugreg(current->thread.debugreg6, 6);
set_debugreg(current->thread.debugreg7, 7);
}
}
static void __restore_processor_state(struct saved_context *ctxt)
{
/*
* control registers
*/
/* cr4 was introduced in the Pentium CPU */
if (ctxt->cr4)
write_cr4(ctxt->cr4);
write_cr3(ctxt->cr3);
write_cr2(ctxt->cr2);
write_cr0(ctxt->cr0);
/*
* now restore the descriptor tables to their proper values
* ltr is done i fix_processor_context().
*/
load_gdt(&ctxt->gdt);
load_idt(&ctxt->idt);
/*
* segment registers
*/
loadsegment(es, ctxt->es);
loadsegment(fs, ctxt->fs);
loadsegment(gs, ctxt->gs);
loadsegment(ss, ctxt->ss);
/*
* sysenter MSRs
*/
if (boot_cpu_has(X86_FEATURE_SEP))
enable_sep_cpu();
/*
* restore XCR0 for xsave capable cpu's.
*/
if (cpu_has_xsave)
xsetbv(XCR_XFEATURE_ENABLED_MASK, pcntxt_mask);
fix_processor_context();
do_fpu_end();
mtrr_ap_init();
mcheck_init(&boot_cpu_data);
}
/* Needed by apm.c */
void restore_processor_state(void)
{
__restore_processor_state(&saved_context);
}
EXPORT_SYMBOL(restore_processor_state);
drivers/base/platform.c
+12 -24
View File
@@ -469,22 +469,6 @@ static void platform_drv_shutdown(struct device *_dev)
drv->shutdown(dev);
}
static int platform_drv_suspend(struct device *_dev, pm_message_t state)
{
struct platform_driver *drv = to_platform_driver(_dev->driver);
struct platform_device *dev = to_platform_device(_dev);
return drv->suspend(dev, state);
}
static int platform_drv_resume(struct device *_dev)
{
struct platform_driver *drv = to_platform_driver(_dev->driver);
struct platform_device *dev = to_platform_device(_dev);
return drv->resume(dev);
}
/**
* platform_driver_register
* @drv: platform driver structure
@@ -498,10 +482,10 @@ int platform_driver_register(struct platform_driver *drv)
drv->driver.remove = platform_drv_remove;
if (drv->shutdown)
drv->driver.shutdown = platform_drv_shutdown;
if (drv->suspend)
drv->driver.suspend = platform_drv_suspend;
if (drv->resume)
drv->driver.resume = platform_drv_resume;
if (drv->suspend || drv->resume)
pr_warning("Platform driver '%s' needs updating - please use "
"dev_pm_ops\n", drv->driver.name);
return driver_register(&drv->driver);
}
EXPORT_SYMBOL_GPL(platform_driver_register);
@@ -633,10 +617,12 @@ static int platform_match(struct device *dev, struct device_driver *drv)
static int platform_legacy_suspend(struct device *dev, pm_message_t mesg)
{
struct platform_driver *pdrv = to_platform_driver(dev->driver);
struct platform_device *pdev = to_platform_device(dev);
int ret = 0;
if (dev->driver && dev->driver->suspend)
ret = dev->driver->suspend(dev, mesg);
if (dev->driver && pdrv->suspend)
ret = pdrv->suspend(pdev, mesg);
return ret;
}
@@ -667,10 +653,12 @@ static int platform_legacy_resume_early(struct device *dev)
static int platform_legacy_resume(struct device *dev)
{
struct platform_driver *pdrv = to_platform_driver(dev->driver);
struct platform_device *pdev = to_platform_device(dev);
int ret = 0;
if (dev->driver && dev->driver->resume)
ret = dev->driver->resume(dev);
if (dev->driver && pdrv->resume)
ret = pdrv->resume(pdev);
return ret;
}
drivers/base/power/main.c
+34 -60
View File
@@ -315,13 +315,13 @@ static void pm_dev_err(struct device *dev, pm_message_t state, char *info,
/*------------------------- Resume routines -------------------------*/
/**
* resume_device_noirq - Power on one device (early resume).
* device_resume_noirq - Power on one device (early resume).
* @dev: Device.
* @state: PM transition of the system being carried out.
*
* Must be called with interrupts disabled.
*/
static int resume_device_noirq(struct device *dev, pm_message_t state)
static int device_resume_noirq(struct device *dev, pm_message_t state)
{
int error = 0;
@@ -334,9 +334,6 @@ static int resume_device_noirq(struct device *dev, pm_message_t state)
if (dev->bus->pm) {
pm_dev_dbg(dev, state, "EARLY ");
error = pm_noirq_op(dev, dev->bus->pm, state);
} else if (dev->bus->resume_early) {
pm_dev_dbg(dev, state, "legacy EARLY ");
error = dev->bus->resume_early(dev);
}
End:
TRACE_RESUME(error);
@@ -344,16 +341,16 @@ static int resume_device_noirq(struct device *dev, pm_message_t state)
}
/**
* dpm_power_up - Power on all regular (non-sysdev) devices.
* dpm_resume_noirq - Power on all regular (non-sysdev) devices.
* @state: PM transition of the system being carried out.
*
* Execute the appropriate "noirq resume" callback for all devices marked
* as DPM_OFF_IRQ.
* Call the "noirq" resume handlers for all devices marked as
* DPM_OFF_IRQ and enable device drivers to receive interrupts.
*
* Must be called under dpm_list_mtx. Device drivers should not receive
* interrupts while it's being executed.
*/
static void dpm_power_up(pm_message_t state)
void dpm_resume_noirq(pm_message_t state)
{
struct device *dev;
@@ -363,33 +360,21 @@ static void dpm_power_up(pm_message_t state)
int error;
dev->power.status = DPM_OFF;
error = resume_device_noirq(dev, state);
error = device_resume_noirq(dev, state);
if (error)
pm_dev_err(dev, state, " early", error);
}
mutex_unlock(&dpm_list_mtx);
}
/**
* device_power_up - Turn on all devices that need special attention.
* @state: PM transition of the system being carried out.
*
* Call the "early" resume handlers and enable device drivers to receive
* interrupts.
*/
void device_power_up(pm_message_t state)
{
dpm_power_up(state);
resume_device_irqs();
}
EXPORT_SYMBOL_GPL(device_power_up);
EXPORT_SYMBOL_GPL(dpm_resume_noirq);
/**
* resume_device - Restore state for one device.
* device_resume - Restore state for one device.
* @dev: Device.
* @state: PM transition of the system being carried out.
*/
static int resume_device(struct device *dev, pm_message_t state)
static int device_resume(struct device *dev, pm_message_t state)
{
int error = 0;
@@ -414,9 +399,6 @@ static int resume_device(struct device *dev, pm_message_t state)
if (dev->type->pm) {
pm_dev_dbg(dev, state, "type ");
error = pm_op(dev, dev->type->pm, state);
} else if (dev->type->resume) {
pm_dev_dbg(dev, state, "legacy type ");
error = dev->type->resume(dev);
}
if (error)
goto End;
@@ -462,7 +444,7 @@ static void dpm_resume(pm_message_t state)
dev->power.status = DPM_RESUMING;
mutex_unlock(&dpm_list_mtx);
error = resume_device(dev, state);
error = device_resume(dev, state);
mutex_lock(&dpm_list_mtx);
if (error)
@@ -480,11 +462,11 @@ static void dpm_resume(pm_message_t state)
}
/**
* complete_device - Complete a PM transition for given device
* device_complete - Complete a PM transition for given device
* @dev: Device.
* @state: PM transition of the system being carried out.
*/
static void complete_device(struct device *dev, pm_message_t state)
static void device_complete(struct device *dev, pm_message_t state)
{
down(&dev->sem);
@@ -527,7 +509,7 @@ static void dpm_complete(pm_message_t state)
dev->power.status = DPM_ON;
mutex_unlock(&dpm_list_mtx);
complete_device(dev, state);
device_complete(dev, state);
mutex_lock(&dpm_list_mtx);
}
@@ -540,19 +522,19 @@ static void dpm_complete(pm_message_t state)
}
/**
* device_resume - Restore state of each device in system.
* dpm_resume_end - Restore state of each device in system.
* @state: PM transition of the system being carried out.
*
* Resume all the devices, unlock them all, and allow new
* devices to be registered once again.
*/
void device_resume(pm_message_t state)
void dpm_resume_end(pm_message_t state)
{
might_sleep();
dpm_resume(state);
dpm_complete(state);
}
EXPORT_SYMBOL_GPL(device_resume);
EXPORT_SYMBOL_GPL(dpm_resume_end);
/*------------------------- Suspend routines -------------------------*/
@@ -577,13 +559,13 @@ static pm_message_t resume_event(pm_message_t sleep_state)
}
/**
* suspend_device_noirq - Shut down one device (late suspend).
* device_suspend_noirq - Shut down one device (late suspend).
* @dev: Device.
* @state: PM transition of the system being carried out.
*
* This is called with interrupts off and only a single CPU running.
*/
static int suspend_device_noirq(struct device *dev, pm_message_t state)
static int device_suspend_noirq(struct device *dev, pm_message_t state)
{
int error = 0;
@@ -593,24 +575,20 @@ static int suspend_device_noirq(struct device *dev, pm_message_t state)
if (dev->bus->pm) {
pm_dev_dbg(dev, state, "LATE ");
error = pm_noirq_op(dev, dev->bus->pm, state);
} else if (dev->bus->suspend_late) {
pm_dev_dbg(dev, state, "legacy LATE ");
error = dev->bus->suspend_late(dev, state);
suspend_report_result(dev->bus->suspend_late, error);
}
return error;
}
/**
* device_power_down - Shut down special devices.
* dpm_suspend_noirq - Power down all regular (non-sysdev) devices.
* @state: PM transition of the system being carried out.
*
* Prevent device drivers from receiving interrupts and call the "late"
* Prevent device drivers from receiving interrupts and call the "noirq"
* suspend handlers.
*
* Must be called under dpm_list_mtx.
*/
int device_power_down(pm_message_t state)
int dpm_suspend_noirq(pm_message_t state)
{
struct device *dev;
int error = 0;
@@ -618,7 +596,7 @@ int device_power_down(pm_message_t state)
suspend_device_irqs();
mutex_lock(&dpm_list_mtx);
list_for_each_entry_reverse(dev, &dpm_list, power.entry) {
error = suspend_device_noirq(dev, state);
error = device_suspend_noirq(dev, state);
if (error) {
pm_dev_err(dev, state, " late", error);
break;
@@ -627,17 +605,17 @@ int device_power_down(pm_message_t state)
}
mutex_unlock(&dpm_list_mtx);
if (error)
device_power_up(resume_event(state));
dpm_resume_noirq(resume_event(state));
return error;
}
EXPORT_SYMBOL_GPL(device_power_down);
EXPORT_SYMBOL_GPL(dpm_suspend_noirq);
/**
* suspend_device - Save state of one device.
* device_suspend - Save state of one device.
* @dev: Device.
* @state: PM transition of the system being carried out.
*/
static int suspend_device(struct device *dev, pm_message_t state)
static int device_suspend(struct device *dev, pm_message_t state)
{
int error = 0;
@@ -660,10 +638,6 @@ static int suspend_device(struct device *dev, pm_message_t state)
if (dev->type->pm) {
pm_dev_dbg(dev, state, "type ");
error = pm_op(dev, dev->type->pm, state);
} else if (dev->type->suspend) {
pm_dev_dbg(dev, state, "legacy type ");
error = dev->type->suspend(dev, state);
suspend_report_result(dev->type->suspend, error);
}
if (error)
goto End;
@@ -704,7 +678,7 @@ static int dpm_suspend(pm_message_t state)
get_device(dev);
mutex_unlock(&dpm_list_mtx);
error = suspend_device(dev, state);
error = device_suspend(dev, state);
mutex_lock(&dpm_list_mtx);
if (error) {
@@ -723,11 +697,11 @@ static int dpm_suspend(pm_message_t state)
}
/**
* prepare_device - Execute the ->prepare() callback(s) for given device.
* device_prepare - Execute the ->prepare() callback(s) for given device.
* @dev: Device.
* @state: PM transition of the system being carried out.
*/
static int prepare_device(struct device *dev, pm_message_t state)
static int device_prepare(struct device *dev, pm_message_t state)
{
int error = 0;
@@ -781,7 +755,7 @@ static int dpm_prepare(pm_message_t state)
dev->power.status = DPM_PREPARING;
mutex_unlock(&dpm_list_mtx);
error = prepare_device(dev, state);
error = device_prepare(dev, state);
mutex_lock(&dpm_list_mtx);
if (error) {
@@ -807,12 +781,12 @@ static int dpm_prepare(pm_message_t state)
}
/**
* device_suspend - Save state and stop all devices in system.
* dpm_suspend_start - Save state and stop all devices in system.
* @state: PM transition of the system being carried out.
*
* Prepare and suspend all devices.
*/
int device_suspend(pm_message_t state)
int dpm_suspend_start(pm_message_t state)
{
int error;
@@ -822,7 +796,7 @@ int device_suspend(pm_message_t state)
error = dpm_suspend(state);
return error;
}
EXPORT_SYMBOL_GPL(device_suspend);
EXPORT_SYMBOL_GPL(dpm_suspend_start);
void __suspend_report_result(const char *function, void *fn, int ret)
{
drivers/base/sys.c
+16
View File
@@ -343,11 +343,15 @@ static void __sysdev_resume(struct sys_device *dev)
/* First, call the class-specific one */
if (cls->resume)
cls->resume(dev);
WARN_ONCE(!irqs_disabled(),
"Interrupts enabled after %pF\n", cls->resume);
/* Call auxillary drivers next. */
list_for_each_entry(drv, &cls->drivers, entry) {
if (drv->resume)
drv->resume(dev);
WARN_ONCE(!irqs_disabled(),
"Interrupts enabled after %pF\n", drv->resume);
}
}
@@ -377,6 +381,9 @@ int sysdev_suspend(pm_message_t state)
if (ret)
return ret;
WARN_ONCE(!irqs_disabled(),
"Interrupts enabled while suspending system devices\n");
pr_debug("Suspending System Devices\n");
list_for_each_entry_reverse(cls, &system_kset->list, kset.kobj.entry) {
@@ -393,6 +400,9 @@ int sysdev_suspend(pm_message_t state)
if (ret)
goto aux_driver;
}
WARN_ONCE(!irqs_disabled(),
"Interrupts enabled after %pF\n",
drv->suspend);
}
/* Now call the generic one */
@@ -400,6 +410,9 @@ int sysdev_suspend(pm_message_t state)
ret = cls->suspend(sysdev, state);
if (ret)
goto cls_driver;
WARN_ONCE(!irqs_disabled(),
"Interrupts enabled after %pF\n",
cls->suspend);
}
}
}
@@ -452,6 +465,9 @@ int sysdev_resume(void)
{
struct sysdev_class *cls;
WARN_ONCE(!irqs_disabled(),
"Interrupts enabled while resuming system devices\n");
pr_debug("Resuming System Devices\n");
list_for_each_entry(cls, &system_kset->list, kset.kobj.entry) {
drivers/xen/manage.c
+8 -8
View File
@@ -43,7 +43,7 @@ static int xen_suspend(void *data)
if (err) {
printk(KERN_ERR "xen_suspend: sysdev_suspend failed: %d\n",
err);
device_power_up(PMSG_RESUME);
dpm_resume_noirq(PMSG_RESUME);
return err;
}
@@ -69,7 +69,7 @@ static int xen_suspend(void *data)
}
sysdev_resume();
device_power_up(PMSG_RESUME);
dpm_resume_noirq(PMSG_RESUME);
return 0;
}
@@ -92,18 +92,18 @@ static void do_suspend(void)
}
#endif
err = device_suspend(PMSG_SUSPEND);
err = dpm_suspend_start(PMSG_SUSPEND);
if (err) {
printk(KERN_ERR "xen suspend: device_suspend %d\n", err);
printk(KERN_ERR "xen suspend: dpm_suspend_start %d\n", err);
goto out;
}
printk(KERN_DEBUG "suspending xenstore...\n");
xs_suspend();
err = device_power_down(PMSG_SUSPEND);
err = dpm_suspend_noirq(PMSG_SUSPEND);
if (err) {
printk(KERN_ERR "device_power_down failed: %d\n", err);
printk(KERN_ERR "dpm_suspend_noirq failed: %d\n", err);
goto resume_devices;
}
@@ -119,10 +119,10 @@ static void do_suspend(void)
} else
xs_suspend_cancel();
device_power_up(PMSG_RESUME);
dpm_resume_noirq(PMSG_RESUME);
resume_devices:
device_resume(PMSG_RESUME);
dpm_resume_end(PMSG_RESUME);
/* Make sure timer events get retriggered on all CPUs */
clock_was_set();
include/linux/device.h
-5
View File
@@ -62,8 +62,6 @@ struct bus_type {
void (*shutdown)(struct device *dev);
int (*suspend)(struct device *dev, pm_message_t state);
int (*suspend_late)(struct device *dev, pm_message_t state);
int (*resume_early)(struct device *dev);
int (*resume)(struct device *dev);
struct dev_pm_ops *pm;
@@ -291,9 +289,6 @@ struct device_type {
int (*uevent)(struct device *dev, struct kobj_uevent_env *env);
void (*release)(struct device *dev);
int (*suspend)(struct device *dev, pm_message_t state);
int (*resume)(struct device *dev);
struct dev_pm_ops *pm;
};
include/linux/interrupt.h
+6
View File
@@ -183,6 +183,7 @@ extern void disable_irq(unsigned int irq);
extern void enable_irq(unsigned int irq);
/* The following three functions are for the core kernel use only. */
#ifdef CONFIG_GENERIC_HARDIRQS
extern void suspend_device_irqs(void);
extern void resume_device_irqs(void);
#ifdef CONFIG_PM_SLEEP
@@ -190,6 +191,11 @@ extern int check_wakeup_irqs(void);
#else
static inline int check_wakeup_irqs(void) { return 0; }
#endif
#else
static inline void suspend_device_irqs(void) { };
static inline void resume_device_irqs(void) { };
static inline int check_wakeup_irqs(void) { return 0; }
#endif
#if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_HARDIRQS)
include/linux/pm.h
+5 -6
View File
@@ -382,14 +382,13 @@ struct dev_pm_info {
#ifdef CONFIG_PM_SLEEP
extern void device_pm_lock(void);
extern int sysdev_resume(void);
extern void device_power_up(pm_message_t state);
extern void device_resume(pm_message_t state);
extern void dpm_resume_noirq(pm_message_t state);
extern void dpm_resume_end(pm_message_t state);
extern void device_pm_unlock(void);
extern int sysdev_suspend(pm_message_t state);
extern int device_power_down(pm_message_t state);
extern int device_suspend(pm_message_t state);
extern int device_prepare_suspend(pm_message_t state);
extern int dpm_suspend_noirq(pm_message_t state);
extern int dpm_suspend_start(pm_message_t state);
extern void __suspend_report_result(const char *function, void *fn, int ret);
@@ -403,7 +402,7 @@ extern void __suspend_report_result(const char *function, void *fn, int ret);
#define device_pm_lock() do {} while (0)
#define device_pm_unlock() do {} while (0)
static inline int device_suspend(pm_message_t state)
static inline int dpm_suspend_start(pm_message_t state)
{
return 0;
}

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