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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:
  PCI PM: Make pci_prepare_to_sleep() disable wake-up if needed
  radeonfb: Use __pci_complete_power_transition()
  PCI PM: Introduce __pci_[start|complete]_power_transition() (rev. 2)
  PCI PM: Restore config spaces of all devices during early resume
  PCI PM: Make pci_set_power_state() handle devices with no PM support
  PCI PM: Put devices into low power states during late suspend (rev. 2)
  PCI PM: Move pci_restore_standard_config to pci-driver.c
  PCI PM: Use pci_set_power_state during early resume
  PCI PM: Consistently use variable name "error" for pm call return values
  kexec: Change kexec jump code ordering
  PM: Change hibernation code ordering
  PM: Change suspend code ordering
  PM: Rework handling of interrupts during suspend-resume
  PM: Introduce functions for suspending and resuming device interrupts
This commit is contained in:
Linus Torvalds 2009-03-30 15:12:14 -07:00
commit 53d8f67082
18 changed files with 474 additions and 269 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
arch/x86/kernel/apm_32.c
View File

@ -1190,8 +1190,10 @@ static int suspend(int vetoable)
struct apm_user *as;
device_suspend(PMSG_SUSPEND);
local_irq_disable();
device_power_down(PMSG_SUSPEND);
local_irq_disable();
sysdev_suspend(PMSG_SUSPEND);
local_irq_enable();
@ -1209,9 +1211,12 @@ static int suspend(int vetoable)
if (err != APM_SUCCESS)
apm_error("suspend", err);
err = (err == APM_SUCCESS) ? 0 : -EIO;
sysdev_resume();
device_power_up(PMSG_RESUME);
local_irq_enable();
device_power_up(PMSG_RESUME);
device_resume(PMSG_RESUME);
queue_event(APM_NORMAL_RESUME, NULL);
spin_lock(&user_list_lock);
@ -1228,8 +1233,9 @@ static void standby(void)
{
int err;
local_irq_disable();
device_power_down(PMSG_SUSPEND);
local_irq_disable();
sysdev_suspend(PMSG_SUSPEND);
local_irq_enable();
@ -1239,8 +1245,9 @@ static void standby(void)
local_irq_disable();
sysdev_resume();
device_power_up(PMSG_RESUME);
local_irq_enable();
device_power_up(PMSG_RESUME);
}
static apm_event_t get_event(void)

20
drivers/base/power/main.c
View File

@ -23,6 +23,7 @@
#include <linux/pm.h>
#include <linux/resume-trace.h>
#include <linux/rwsem.h>
#include <linux/interrupt.h>
#include "../base.h"
#include "power.h"
@ -349,7 +350,8 @@ static int resume_device_noirq(struct device *dev, pm_message_t state)
* Execute the appropriate "noirq resume" callback for all devices marked
* as DPM_OFF_IRQ.
*
* Must be called with interrupts disabled and only one CPU running.
* 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)
{
@ -370,14 +372,13 @@ static void dpm_power_up(pm_message_t state)
* device_power_up - Turn on all devices that need special attention.
* @state: PM transition of the system being carried out.
*
* Power on system devices, then devices that required we shut them down
* with interrupts disabled.
*
* Must be called with interrupts disabled.
* 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);
@ -602,16 +603,17 @@ static int suspend_device_noirq(struct device *dev, pm_message_t state)
* device_power_down - Shut down special devices.
* @state: PM transition of the system being carried out.
*
* Power down devices that require interrupts to be disabled.
* Then power down system devices.
* Prevent device drivers from receiving interrupts and call the "late"
* suspend handlers.
*
* Must be called with interrupts disabled and only one CPU running.
* Must be called under dpm_list_mtx.
*/
int device_power_down(pm_message_t state)
{
struct device *dev;
int error = 0;
suspend_device_irqs();
list_for_each_entry_reverse(dev, &dpm_list, power.entry) {
error = suspend_device_noirq(dev, state);
if (error) {
@ -621,7 +623,7 @@ int device_power_down(pm_message_t state)
dev->power.status = DPM_OFF_IRQ;
}
if (error)
dpm_power_up(resume_event(state));
device_power_up(resume_event(state));
return error;
}
EXPORT_SYMBOL_GPL(device_power_down);

8
drivers/base/sys.c
View File

@ -22,6 +22,7 @@
#include <linux/pm.h>
#include <linux/device.h>
#include <linux/mutex.h>
#include <linux/interrupt.h>
#include "base.h"
@ -369,6 +370,13 @@ int sysdev_suspend(pm_message_t state)
struct sysdev_driver *drv, *err_drv;
int ret;
pr_debug("Checking wake-up interrupts\n");
/* Return error code if there are any wake-up interrupts pending */
ret = check_wakeup_irqs();
if (ret)
return ret;
pr_debug("Suspending System Devices\n");
list_for_each_entry_reverse(cls, &system_kset->list, kset.kobj.entry) {

203
drivers/pci/pci-driver.c
View File

@ -352,53 +352,60 @@ static int pci_legacy_suspend(struct device *dev, pm_message_t state)
{
struct pci_dev * pci_dev = to_pci_dev(dev);
struct pci_driver * drv = pci_dev->driver;
int i = 0;
pci_dev->state_saved = false;
if (drv && drv->suspend) {
pci_power_t prev = pci_dev->current_state;
int error;
pci_dev->state_saved = false;
error = drv->suspend(pci_dev, state);
suspend_report_result(drv->suspend, error);
if (error)
return error;
i = drv->suspend(pci_dev, state);
suspend_report_result(drv->suspend, i);
if (i)
return i;
if (pci_dev->state_saved)
goto Fixup;
if (pci_dev->current_state != PCI_D0
if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0
&& pci_dev->current_state != PCI_UNKNOWN) {
WARN_ONCE(pci_dev->current_state != prev,
"PCI PM: Device state not saved by %pF\n",
drv->suspend);
goto Fixup;
}
}
pci_save_state(pci_dev);
/*
* This is for compatibility with existing code with legacy PM support.
*/
pci_pm_set_unknown_state(pci_dev);
Fixup:
pci_fixup_device(pci_fixup_suspend, pci_dev);
return i;
return 0;
}
static int pci_legacy_suspend_late(struct device *dev, pm_message_t state)
{
struct pci_dev * pci_dev = to_pci_dev(dev);
struct pci_driver * drv = pci_dev->driver;
int i = 0;
if (drv && drv->suspend_late) {
i = drv->suspend_late(pci_dev, state);
suspend_report_result(drv->suspend_late, i);
pci_power_t prev = pci_dev->current_state;
int error;
error = drv->suspend_late(pci_dev, state);
suspend_report_result(drv->suspend_late, error);
if (error)
return error;
if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0
&& pci_dev->current_state != PCI_UNKNOWN) {
WARN_ONCE(pci_dev->current_state != prev,
"PCI PM: Device state not saved by %pF\n",
drv->suspend_late);
return 0;
}
}
return i;
if (!pci_dev->state_saved)
pci_save_state(pci_dev);
pci_pm_set_unknown_state(pci_dev);
return 0;
}
static int pci_legacy_resume_early(struct device *dev)
@ -423,6 +430,23 @@ static int pci_legacy_resume(struct device *dev)
/* Auxiliary functions used by the new power management framework */
/**
* pci_restore_standard_config - restore standard config registers of PCI device
* @pci_dev: PCI device to handle
*/
static int pci_restore_standard_config(struct pci_dev *pci_dev)
{
pci_update_current_state(pci_dev, PCI_UNKNOWN);
if (pci_dev->current_state != PCI_D0) {
int error = pci_set_power_state(pci_dev, PCI_D0);
if (error)
return error;
}
return pci_dev->state_saved ? pci_restore_state(pci_dev) : 0;
}
static void pci_pm_default_resume_noirq(struct pci_dev *pci_dev)
{
pci_restore_standard_config(pci_dev);
@ -443,7 +467,6 @@ static void pci_pm_default_suspend(struct pci_dev *pci_dev)
/* Disable non-bridge devices without PM support */
if (!pci_is_bridge(pci_dev))
pci_disable_enabled_device(pci_dev);
pci_save_state(pci_dev);
}
static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev)
@ -493,13 +516,13 @@ static int pci_pm_suspend(struct device *dev)
if (pci_has_legacy_pm_support(pci_dev))
return pci_legacy_suspend(dev, PMSG_SUSPEND);
pci_dev->state_saved = false;
if (!pm) {
pci_pm_default_suspend(pci_dev);
goto Fixup;
}
pci_dev->state_saved = false;
if (pm->suspend) {
pci_power_t prev = pci_dev->current_state;
int error;
@ -509,24 +532,14 @@ static int pci_pm_suspend(struct device *dev)
if (error)
return error;
if (pci_dev->state_saved)
goto Fixup;
if (pci_dev->current_state != PCI_D0
if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0
&& pci_dev->current_state != PCI_UNKNOWN) {
WARN_ONCE(pci_dev->current_state != prev,
"PCI PM: State of device not saved by %pF\n",
pm->suspend);
goto Fixup;
}
}
if (!pci_dev->state_saved) {
pci_save_state(pci_dev);
if (!pci_is_bridge(pci_dev))
pci_prepare_to_sleep(pci_dev);
}
Fixup:
pci_fixup_device(pci_fixup_suspend, pci_dev);
@ -536,21 +549,43 @@ static int pci_pm_suspend(struct device *dev)
static int pci_pm_suspend_noirq(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
struct device_driver *drv = dev->driver;
int error = 0;
struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
if (pci_has_legacy_pm_support(pci_dev))
return pci_legacy_suspend_late(dev, PMSG_SUSPEND);
if (drv && drv->pm && drv->pm->suspend_noirq) {
error = drv->pm->suspend_noirq(dev);
suspend_report_result(drv->pm->suspend_noirq, error);
if (!pm) {
pci_save_state(pci_dev);
return 0;
}
if (!error)
pci_pm_set_unknown_state(pci_dev);
if (pm->suspend_noirq) {
pci_power_t prev = pci_dev->current_state;
int error;
return error;
error = pm->suspend_noirq(dev);
suspend_report_result(pm->suspend_noirq, error);
if (error)
return error;
if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0
&& pci_dev->current_state != PCI_UNKNOWN) {
WARN_ONCE(pci_dev->current_state != prev,
"PCI PM: State of device not saved by %pF\n",
pm->suspend_noirq);
return 0;
}
}
if (!pci_dev->state_saved) {
pci_save_state(pci_dev);
if (!pci_is_bridge(pci_dev))
pci_prepare_to_sleep(pci_dev);
}
pci_pm_set_unknown_state(pci_dev);
return 0;
}
static int pci_pm_resume_noirq(struct device *dev)
@ -617,13 +652,13 @@ static int pci_pm_freeze(struct device *dev)
if (pci_has_legacy_pm_support(pci_dev))
return pci_legacy_suspend(dev, PMSG_FREEZE);
pci_dev->state_saved = false;
if (!pm) {
pci_pm_default_suspend(pci_dev);
return 0;
}
pci_dev->state_saved = false;
if (pm->freeze) {
int error;
@ -633,9 +668,6 @@ static int pci_pm_freeze(struct device *dev)
return error;
}
if (!pci_dev->state_saved)
pci_save_state(pci_dev);
return 0;
}
@ -643,20 +675,25 @@ static int pci_pm_freeze_noirq(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
struct device_driver *drv = dev->driver;
int error = 0;
if (pci_has_legacy_pm_support(pci_dev))
return pci_legacy_suspend_late(dev, PMSG_FREEZE);
if (drv && drv->pm && drv->pm->freeze_noirq) {
int error;
error = drv->pm->freeze_noirq(dev);
suspend_report_result(drv->pm->freeze_noirq, error);
if (error)
return error;
}
if (!error)
pci_pm_set_unknown_state(pci_dev);
if (!pci_dev->state_saved)
pci_save_state(pci_dev);
return error;
pci_pm_set_unknown_state(pci_dev);
return 0;
}
static int pci_pm_thaw_noirq(struct device *dev)
@ -699,46 +736,56 @@ static int pci_pm_poweroff(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
int error = 0;
if (pci_has_legacy_pm_support(pci_dev))
return pci_legacy_suspend(dev, PMSG_HIBERNATE);
pci_dev->state_saved = false;
if (!pm) {
pci_pm_default_suspend(pci_dev);
goto Fixup;
}
pci_dev->state_saved = false;
if (pm->poweroff) {
int error;
error = pm->poweroff(dev);
suspend_report_result(pm->poweroff, error);
if (error)
return error;
}
Fixup:
pci_fixup_device(pci_fixup_suspend, pci_dev);
return 0;
}
static int pci_pm_poweroff_noirq(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
struct device_driver *drv = dev->driver;
if (pci_has_legacy_pm_support(to_pci_dev(dev)))
return pci_legacy_suspend_late(dev, PMSG_HIBERNATE);
if (!drv || !drv->pm)
return 0;
if (drv->pm->poweroff_noirq) {
int error;
error = drv->pm->poweroff_noirq(dev);
suspend_report_result(drv->pm->poweroff_noirq, error);
if (error)
return error;
}
if (!pci_dev->state_saved && !pci_is_bridge(pci_dev))
pci_prepare_to_sleep(pci_dev);
Fixup:
pci_fixup_device(pci_fixup_suspend, pci_dev);
return error;
}
static int pci_pm_poweroff_noirq(struct device *dev)
{
struct device_driver *drv = dev->driver;
int error = 0;
if (pci_has_legacy_pm_support(to_pci_dev(dev)))
return pci_legacy_suspend_late(dev, PMSG_HIBERNATE);
if (drv && drv->pm && drv->pm->poweroff_noirq) {
error = drv->pm->poweroff_noirq(dev);
suspend_report_result(drv->pm->poweroff_noirq, error);
}
return error;
return 0;
}
static int pci_pm_restore_noirq(struct device *dev)

142
drivers/pci/pci.c
View File

@ -426,7 +426,6 @@ static inline int platform_pci_sleep_wake(struct pci_dev *dev, bool enable)
* given PCI device
* @dev: PCI device to handle.
* @state: PCI power state (D0, D1, D2, D3hot) to put the device into.
* @wait: If 'true', wait for the device to change its power state
*
* RETURN VALUE:
* -EINVAL if the requested state is invalid.
@ -435,12 +434,15 @@ static inline int platform_pci_sleep_wake(struct pci_dev *dev, bool enable)
* 0 if device already is in the requested state.
* 0 if device's power state has been successfully changed.
*/
static int
pci_raw_set_power_state(struct pci_dev *dev, pci_power_t state, bool wait)
static int pci_raw_set_power_state(struct pci_dev *dev, pci_power_t state)
{
u16 pmcsr;
bool need_restore = false;
/* Check if we're already there */
if (dev->current_state == state)
return 0;
if (!dev->pm_cap)
return -EIO;
@ -451,10 +453,7 @@ pci_raw_set_power_state(struct pci_dev *dev, pci_power_t state, bool wait)
* Can enter D0 from any state, but if we can only go deeper
* to sleep if we're already in a low power state
*/
if (dev->current_state == state) {
/* we're already there */
return 0;
} else if (state != PCI_D0 && dev->current_state <= PCI_D3cold
if (state != PCI_D0 && dev->current_state <= PCI_D3cold
&& dev->current_state > state) {
dev_err(&dev->dev, "invalid power transition "
"(from state %d to %d)\n", dev->current_state, state);
@ -481,10 +480,8 @@ pci_raw_set_power_state(struct pci_dev *dev, pci_power_t state, bool wait)
break;
case PCI_UNKNOWN: /* Boot-up */
if ((pmcsr & PCI_PM_CTRL_STATE_MASK) == PCI_D3hot
&& !(pmcsr & PCI_PM_CTRL_NO_SOFT_RESET)) {
&& !(pmcsr & PCI_PM_CTRL_NO_SOFT_RESET))
need_restore = true;
wait = true;
}
/* Fall-through: force to D0 */
default:
pmcsr = 0;
@ -494,9 +491,6 @@ pci_raw_set_power_state(struct pci_dev *dev, pci_power_t state, bool wait)
/* enter specified state */
pci_write_config_word(dev, dev->pm_cap + PCI_PM_CTRL, pmcsr);
if (!wait)
return 0;
/* Mandatory power management transition delays */
/* see PCI PM 1.1 5.6.1 table 18 */
if (state == PCI_D3hot || dev->current_state == PCI_D3hot)
@ -521,7 +515,7 @@ pci_raw_set_power_state(struct pci_dev *dev, pci_power_t state, bool wait)
if (need_restore)
pci_restore_bars(dev);
if (wait && dev->bus->self)
if (dev->bus->self)
pcie_aspm_pm_state_change(dev->bus->self);
return 0;
@ -545,6 +539,53 @@ void pci_update_current_state(struct pci_dev *dev, pci_power_t state)
}
}
/**
* pci_platform_power_transition - Use platform to change device power state
* @dev: PCI device to handle.
* @state: State to put the device into.
*/
static int pci_platform_power_transition(struct pci_dev *dev, pci_power_t state)
{
int error;
if (platform_pci_power_manageable(dev)) {
error = platform_pci_set_power_state(dev, state);
if (!error)
pci_update_current_state(dev, state);
} else {
error = -ENODEV;
/* Fall back to PCI_D0 if native PM is not supported */
pci_update_current_state(dev, PCI_D0);
}
return error;
}
/**
* __pci_start_power_transition - Start power transition of a PCI device
* @dev: PCI device to handle.
* @state: State to put the device into.
*/
static void __pci_start_power_transition(struct pci_dev *dev, pci_power_t state)
{
if (state == PCI_D0)
pci_platform_power_transition(dev, PCI_D0);
}
/**
* __pci_complete_power_transition - Complete power transition of a PCI device
* @dev: PCI device to handle.
* @state: State to put the device into.
*
* This function should not be called directly by device drivers.
*/
int __pci_complete_power_transition(struct pci_dev *dev, pci_power_t state)
{
return state > PCI_D0 ?
pci_platform_power_transition(dev, state) : -EINVAL;
}
EXPORT_SYMBOL_GPL(__pci_complete_power_transition);
/**
* pci_set_power_state - Set the power state of a PCI device
* @dev: PCI device to handle.
@ -577,30 +618,21 @@ int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
*/
return 0;
if (state == PCI_D0 && platform_pci_power_manageable(dev)) {
/*
* Allow the platform to change the state, for example via ACPI
* _PR0, _PS0 and some such, but do not trust it.
*/
int ret = platform_pci_set_power_state(dev, PCI_D0);
if (!ret)
pci_update_current_state(dev, PCI_D0);
}
/* Check if we're already there */
if (dev->current_state == state)
return 0;
__pci_start_power_transition(dev, state);
/* This device is quirked not to be put into D3, so
don't put it in D3 */
if (state == PCI_D3hot && (dev->dev_flags & PCI_DEV_FLAGS_NO_D3))
return 0;
error = pci_raw_set_power_state(dev, state, true);
error = pci_raw_set_power_state(dev, state);
if (state > PCI_D0 && platform_pci_power_manageable(dev)) {
/* Allow the platform to finalize the transition */
int ret = platform_pci_set_power_state(dev, state);
if (!ret) {
pci_update_current_state(dev, state);
error = 0;
}
}
if (!__pci_complete_power_transition(dev, state))
error = 0;
return error;
}
@ -1231,7 +1263,7 @@ int pci_prepare_to_sleep(struct pci_dev *dev)
if (target_state == PCI_POWER_ERROR)
return -EIO;
pci_enable_wake(dev, target_state, true);
pci_enable_wake(dev, target_state, device_may_wakeup(&dev->dev));
error = pci_set_power_state(dev, target_state);
@ -1380,50 +1412,6 @@ void pci_allocate_cap_save_buffers(struct pci_dev *dev)
"unable to preallocate PCI-X save buffer\n");
}
/**
* pci_restore_standard_config - restore standard config registers of PCI device
* @dev: PCI device to handle
*
* This function assumes that the device's configuration space is accessible.
* If the device needs to be powered up, the function will wait for it to
* change the state.
*/
int pci_restore_standard_config(struct pci_dev *dev)
{
pci_power_t prev_state;
int error;
pci_update_current_state(dev, PCI_D0);
prev_state = dev->current_state;
if (prev_state == PCI_D0)
goto Restore;
error = pci_raw_set_power_state(dev, PCI_D0, false);
if (error)
return error;
/*
* This assumes that we won't get a bus in B2 or B3 from the BIOS, but
* we've made this assumption forever and it appears to be universally
* satisfied.
*/
switch(prev_state) {
case PCI_D3cold:
case PCI_D3hot:
mdelay(pci_pm_d3_delay);
break;
case PCI_D2:
udelay(PCI_PM_D2_DELAY);
break;
}
pci_update_current_state(dev, PCI_D0);
Restore:
return dev->state_saved ? pci_restore_state(dev) : 0;
}
/**
* pci_enable_ari - enable ARI forwarding if hardware support it
* @dev: the PCI device

1
drivers/pci/pci.h
View File

@ -49,7 +49,6 @@ extern void pci_disable_enabled_device(struct pci_dev *dev);
extern void pci_pm_init(struct pci_dev *dev);
extern void platform_pci_wakeup_init(struct pci_dev *dev);
extern void pci_allocate_cap_save_buffers(struct pci_dev *dev);
extern int pci_restore_standard_config(struct pci_dev *dev);
static inline bool pci_is_bridge(struct pci_dev *pci_dev)
{

2
drivers/video/aty/radeon_pm.c
View File

@ -2582,7 +2582,7 @@ static void radeon_set_suspend(struct radeonfb_info *rinfo, int suspend)
* calling pci_set_power_state()
*/
radeonfb_whack_power_state(rinfo, PCI_D2);
pci_set_power_state(rinfo->pdev, PCI_D2);
__pci_complete_power_transition(rinfo->pdev, PCI_D2);
} else {
printk(KERN_DEBUG "radeonfb (%s): switching to D0 state...\n",
pci_name(rinfo->pdev));

16
drivers/xen/manage.c
View File

@ -39,12 +39,6 @@ static int xen_suspend(void *data)
BUG_ON(!irqs_disabled());
err = device_power_down(PMSG_SUSPEND);
if (err) {
printk(KERN_ERR "xen_suspend: device_power_down failed: %d\n",
err);
return err;
}
err = sysdev_suspend(PMSG_SUSPEND);
if (err) {
printk(KERN_ERR "xen_suspend: sysdev_suspend failed: %d\n",
@ -69,7 +63,6 @@ static int xen_suspend(void *data)
xen_mm_unpin_all();
sysdev_resume();
device_power_up(PMSG_RESUME);
if (!*cancelled) {
xen_irq_resume();
@ -108,6 +101,12 @@ static void do_suspend(void)
/* XXX use normal device tree? */
xenbus_suspend();
err = device_power_down(PMSG_SUSPEND);
if (err) {
printk(KERN_ERR "device_power_down failed: %d\n", err);
goto resume_devices;
}
err = stop_machine(xen_suspend, &cancelled, cpumask_of(0));
if (err) {
printk(KERN_ERR "failed to start xen_suspend: %d\n", err);
@ -120,6 +119,9 @@ static void do_suspend(void)
} else
xenbus_suspend_cancel();
device_power_up(PMSG_RESUME);
resume_devices:
device_resume(PMSG_RESUME);
/* Make sure timer events get retriggered on all CPUs */

9
include/linux/interrupt.h
View File

@ -117,6 +117,15 @@ extern void disable_irq_nosync(unsigned int irq);
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. */
extern void suspend_device_irqs(void);
extern void resume_device_irqs(void);
#ifdef CONFIG_PM_SLEEP
extern int check_wakeup_irqs(void);
#else
static inline int check_wakeup_irqs(void) { return 0; }
#endif
#if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_HARDIRQS)
extern cpumask_var_t irq_default_affinity;

1
include/linux/irq.h
View File

@ -67,6 +67,7 @@ typedef void (*irq_flow_handler_t)(unsigned int irq,
#define IRQ_SPURIOUS_DISABLED 0x00800000 /* IRQ was disabled by the spurious trap */
#define IRQ_MOVE_PCNTXT 0x01000000 /* IRQ migration from process context */
#define IRQ_AFFINITY_SET 0x02000000 /* IRQ affinity was set from userspace*/
#define IRQ_SUSPENDED 0x04000000 /* IRQ has gone through suspend sequence */
#ifdef CONFIG_IRQ_PER_CPU
# define CHECK_IRQ_PER_CPU(var) ((var) & IRQ_PER_CPU)

1
include/linux/pci.h
View File

@ -689,6 +689,7 @@ size_t pci_get_rom_size(struct pci_dev *pdev, void __iomem *rom, size_t size);
/* Power management related routines */
int pci_save_state(struct pci_dev *dev);
int pci_restore_state(struct pci_dev *dev);
int __pci_complete_power_transition(struct pci_dev *dev, pci_power_t state);
int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
bool pci_pme_capable(struct pci_dev *dev, pci_power_t state);

1
kernel/irq/Makefile
View File

@ -4,3 +4,4 @@ obj-$(CONFIG_GENERIC_IRQ_PROBE) += autoprobe.o
obj-$(CONFIG_PROC_FS) += proc.o
obj-$(CONFIG_GENERIC_PENDING_IRQ) += migration.o
obj-$(CONFIG_NUMA_MIGRATE_IRQ_DESC) += numa_migrate.o
obj-$(CONFIG_PM_SLEEP) += pm.o

2
kernel/irq/internals.h
View File

@ -12,6 +12,8 @@ extern void compat_irq_chip_set_default_handler(struct irq_desc *desc);
extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
unsigned long flags);
extern void __disable_irq(struct irq_desc *desc, unsigned int irq, bool susp);
extern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume);
extern struct lock_class_key irq_desc_lock_class;
extern void init_kstat_irqs(struct irq_desc *desc, int cpu, int nr);

31
kernel/irq/manage.c
View File

@ -162,6 +162,20 @@ static inline int setup_affinity(unsigned int irq, struct irq_desc *desc)
}
#endif
void __disable_irq(struct irq_desc *desc, unsigned int irq, bool suspend)
{
if (suspend) {
if (!desc->action || (desc->action->flags & IRQF_TIMER))
return;
desc->status |= IRQ_SUSPENDED;
}
if (!desc->depth++) {
desc->status |= IRQ_DISABLED;
desc->chip->disable(irq);
}
}
/**
* disable_irq_nosync - disable an irq without waiting
* @irq: Interrupt to disable
@ -182,10 +196,7 @@ void disable_irq_nosync(unsigned int irq)
return;
spin_lock_irqsave(&desc->lock, flags);
if (!desc->depth++) {
desc->status |= IRQ_DISABLED;
desc->chip->disable(irq);
}
__disable_irq(desc, irq, false);
spin_unlock_irqrestore(&desc->lock, flags);
}
EXPORT_SYMBOL(disable_irq_nosync);
@ -215,15 +226,21 @@ void disable_irq(unsigned int irq)
}
EXPORT_SYMBOL(disable_irq);
static void __enable_irq(struct irq_desc *desc, unsigned int irq)
void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume)
{
if (resume)
desc->status &= ~IRQ_SUSPENDED;
switch (desc->depth) {
case 0:
err_out:
WARN(1, KERN_WARNING "Unbalanced enable for IRQ %d\n", irq);
break;
case 1: {
unsigned int status = desc->status & ~IRQ_DISABLED;
if (desc->status & IRQ_SUSPENDED)
goto err_out;
/* Prevent probing on this irq: */
desc->status = status | IRQ_NOPROBE;
check_irq_resend(desc, irq);
@ -253,7 +270,7 @@ void enable_irq(unsigned int irq)
return;
spin_lock_irqsave(&desc->lock, flags);
__enable_irq(desc, irq);
__enable_irq(desc, irq, false);
spin_unlock_irqrestore(&desc->lock, flags);
}
EXPORT_SYMBOL(enable_irq);
@ -511,7 +528,7 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
*/
if (shared && (desc->status & IRQ_SPURIOUS_DISABLED)) {
desc->status &= ~IRQ_SPURIOUS_DISABLED;
__enable_irq(desc, irq);
__enable_irq(desc, irq, false);
}
spin_unlock_irqrestore(&desc->lock, flags);

79
kernel/irq/pm.c Normal file
View File

@ -0,0 +1,79 @@
/*
* linux/kernel/irq/pm.c
*
* Copyright (C) 2009 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc.
*
* This file contains power management functions related to interrupts.
*/
#include <linux/irq.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include "internals.h"
/**
* suspend_device_irqs - disable all currently enabled interrupt lines
*
* During system-wide suspend or hibernation device interrupts need to be
* disabled at the chip level and this function is provided for this purpose.
* It disables all interrupt lines that are enabled at the moment and sets the
* IRQ_SUSPENDED flag for them.
*/
void suspend_device_irqs(void)
{
struct irq_desc *desc;
int irq;
for_each_irq_desc(irq, desc) {
unsigned long flags;
spin_lock_irqsave(&desc->lock, flags);
__disable_irq(desc, irq, true);
spin_unlock_irqrestore(&desc->lock, flags);
}
for_each_irq_desc(irq, desc)
if (desc->status & IRQ_SUSPENDED)
synchronize_irq(irq);
}
EXPORT_SYMBOL_GPL(suspend_device_irqs);
/**
* resume_device_irqs - enable interrupt lines disabled by suspend_device_irqs()
*
* Enable all interrupt lines previously disabled by suspend_device_irqs() that
* have the IRQ_SUSPENDED flag set.
*/
void resume_device_irqs(void)
{
struct irq_desc *desc;
int irq;
for_each_irq_desc(irq, desc) {
unsigned long flags;
if (!(desc->status & IRQ_SUSPENDED))
continue;
spin_lock_irqsave(&desc->lock, flags);
__enable_irq(desc, irq, true);
spin_unlock_irqrestore(&desc->lock, flags);
}
}
EXPORT_SYMBOL_GPL(resume_device_irqs);
/**
* check_wakeup_irqs - check if any wake-up interrupts are pending
*/
int check_wakeup_irqs(void)
{
struct irq_desc *desc;
int irq;
for_each_irq_desc(irq, desc)
if ((desc->status & IRQ_WAKEUP) && (desc->status & IRQ_PENDING))
return -EBUSY;
return 0;
}

19
kernel/kexec.c
View File

@ -1450,11 +1450,7 @@ int kernel_kexec(void)
error = device_suspend(PMSG_FREEZE);
if (error)
goto Resume_console;
error = disable_nonboot_cpus();
if (error)
goto Resume_devices;
device_pm_lock();
local_irq_disable();
/* At this point, device_suspend() has been called,
* but *not* device_power_down(). We *must*
* device_power_down() now. Otherwise, drivers for
@ -1464,12 +1460,15 @@ int kernel_kexec(void)
*/
error = device_power_down(PMSG_FREEZE);
if (error)
goto Enable_irqs;
goto Resume_devices;
error = disable_nonboot_cpus();
if (error)
goto Enable_cpus;
local_irq_disable();
/* Suspend system devices */
error = sysdev_suspend(PMSG_FREEZE);
if (error)
goto Power_up_devices;
goto Enable_irqs;
} else
#endif
{
@ -1483,13 +1482,13 @@ int kernel_kexec(void)
#ifdef CONFIG_KEXEC_JUMP
if (kexec_image->preserve_context) {
sysdev_resume();
Power_up_devices:
device_power_up(PMSG_RESTORE);
Enable_irqs:
local_irq_enable();
device_pm_unlock();
Enable_cpus:
enable_nonboot_cpus();
device_power_up(PMSG_RESTORE);
Resume_devices:
device_pm_unlock();
device_resume(PMSG_RESTORE);
Resume_console:
resume_console();

138
kernel/power/disk.c
View File

@ -214,7 +214,7 @@ static int create_image(int platform_mode)
return error;
device_pm_lock();
local_irq_disable();
/* At this point, device_suspend() has been called, but *not*
* device_power_down(). We *must* call device_power_down() now.
* Otherwise, drivers for some devices (e.g. interrupt controllers)
@ -225,13 +225,25 @@ static int create_image(int platform_mode)
if (error) {
printk(KERN_ERR "PM: Some devices failed to power down, "
"aborting hibernation\n");
goto Enable_irqs;
goto Unlock;
}
error = platform_pre_snapshot(platform_mode);
if (error || hibernation_test(TEST_PLATFORM))
goto Platform_finish;
error = disable_nonboot_cpus();
if (error || hibernation_test(TEST_CPUS)
|| hibernation_testmode(HIBERNATION_TEST))
goto Enable_cpus;
local_irq_disable();
sysdev_suspend(PMSG_FREEZE);
if (error) {
printk(KERN_ERR "PM: Some devices failed to power down, "
"aborting hibernation\n");
goto Power_up_devices;
goto Enable_irqs;
}
if (hibernation_test(TEST_CORE))
@ -247,17 +259,28 @@ static int create_image(int platform_mode)
restore_processor_state();
if (!in_suspend)
platform_leave(platform_mode);
Power_up:
sysdev_resume();
/* NOTE: device_power_up() is just a resume() for devices
* that suspended with irqs off ... no overall powerup.
*/
Power_up_devices:
device_power_up(in_suspend ?
(error ? PMSG_RECOVER : PMSG_THAW) : PMSG_RESTORE);
Enable_irqs:
local_irq_enable();
Enable_cpus:
enable_nonboot_cpus();
Platform_finish:
platform_finish(platform_mode);
device_power_up(in_suspend ?
(error ? PMSG_RECOVER : PMSG_THAW) : PMSG_RESTORE);
Unlock:
device_pm_unlock();
return error;
}
@ -291,25 +314,9 @@ int hibernation_snapshot(int platform_mode)
if (hibernation_test(TEST_DEVICES))
goto Recover_platform;
error = platform_pre_snapshot(platform_mode);
if (error || hibernation_test(TEST_PLATFORM))
goto Finish;
error = create_image(platform_mode);
/* Control returns here after successful restore */
error = disable_nonboot_cpus();
if (!error) {
if (hibernation_test(TEST_CPUS))
goto Enable_cpus;
if (hibernation_testmode(HIBERNATION_TEST))
goto Enable_cpus;
error = create_image(platform_mode);
/* Control returns here after successful restore */
}
Enable_cpus:
enable_nonboot_cpus();
Finish:
platform_finish(platform_mode);
Resume_devices:
device_resume(in_suspend ?
(error ? PMSG_RECOVER : PMSG_THAW) : PMSG_RESTORE);
@ -331,19 +338,33 @@ int hibernation_snapshot(int platform_mode)
* kernel.
*/
static int resume_target_kernel(void)
static int resume_target_kernel(bool platform_mode)
{
int error;
device_pm_lock();
local_irq_disable();
error = device_power_down(PMSG_QUIESCE);
if (error) {
printk(KERN_ERR "PM: Some devices failed to power down, "
"aborting resume\n");
goto Enable_irqs;
goto Unlock;
}
sysdev_suspend(PMSG_QUIESCE);
error = platform_pre_restore(platform_mode);
if (error)
goto Cleanup;
error = disable_nonboot_cpus();
if (error)
goto Enable_cpus;
local_irq_disable();
error = sysdev_suspend(PMSG_QUIESCE);
if (error)
goto Enable_irqs;
/* We'll ignore saved state, but this gets preempt count (etc) right */
save_processor_state();
error = restore_highmem();
@ -366,11 +387,23 @@ static int resume_target_kernel(void)
swsusp_free();
restore_processor_state();
touch_softlockup_watchdog();
sysdev_resume();
device_power_up(PMSG_RECOVER);
Enable_irqs:
local_irq_enable();
Enable_cpus:
enable_nonboot_cpus();
Cleanup:
platform_restore_cleanup(platform_mode);
device_power_up(PMSG_RECOVER);
Unlock:
device_pm_unlock();
return error;
}
@ -390,19 +423,10 @@ int hibernation_restore(int platform_mode)
pm_prepare_console();
suspend_console();
error = device_suspend(PMSG_QUIESCE);
if (error)
goto Finish;
error = platform_pre_restore(platform_mode);
if (!error) {
error = disable_nonboot_cpus();
if (!error)
error = resume_target_kernel();
enable_nonboot_cpus();
error = resume_target_kernel(platform_mode);
device_resume(PMSG_RECOVER);
}
platform_restore_cleanup(platform_mode);
device_resume(PMSG_RECOVER);
Finish:
resume_console();
pm_restore_console();
return error;
@ -438,38 +462,46 @@ int hibernation_platform_enter(void)
goto Resume_devices;
}
device_pm_lock();
error = device_power_down(PMSG_HIBERNATE);
if (error)
goto Unlock;
error = hibernation_ops->prepare();
if (error)
goto Resume_devices;
goto Platofrm_finish;
error = disable_nonboot_cpus();
if (error)
goto Finish;
goto Platofrm_finish;
device_pm_lock();
local_irq_disable();
error = device_power_down(PMSG_HIBERNATE);
if (!error) {
sysdev_suspend(PMSG_HIBERNATE);
hibernation_ops->enter();
/* We should never get here */
while (1);
}
local_irq_enable();
device_pm_unlock();
sysdev_suspend(PMSG_HIBERNATE);
hibernation_ops->enter();
/* We should never get here */
while (1);
/*
* We don't need to reenable the nonboot CPUs or resume consoles, since
* the system is going to be halted anyway.
*/
Finish:
Platofrm_finish:
hibernation_ops->finish();
device_power_up(PMSG_RESTORE);
Unlock:
device_pm_unlock();
Resume_devices:
entering_platform_hibernation = false;
device_resume(PMSG_RESTORE);
resume_console();
Close:
hibernation_ops->end();
return error;
}

55
kernel/power/main.c
View File

@ -287,17 +287,32 @@ void __attribute__ ((weak)) arch_suspend_enable_irqs(void)
*/
static int suspend_enter(suspend_state_t state)
{
int error = 0;
int error;
device_pm_lock();
arch_suspend_disable_irqs();
BUG_ON(!irqs_disabled());
if ((error = device_power_down(PMSG_SUSPEND))) {
error = device_power_down(PMSG_SUSPEND);
if (error) {
printk(KERN_ERR "PM: Some devices failed to power down\n");
goto Done;
}
if (suspend_ops->prepare) {
error = suspend_ops->prepare();
if (error)
goto Power_up_devices;
}
if (suspend_test(TEST_PLATFORM))
goto Platfrom_finish;
error = disable_nonboot_cpus();
if (error || suspend_test(TEST_CPUS))
goto Enable_cpus;
arch_suspend_disable_irqs();
BUG_ON(!irqs_disabled());
error = sysdev_suspend(PMSG_SUSPEND);
if (!error) {
if (!suspend_test(TEST_CORE))
@ -305,11 +320,22 @@ static int suspend_enter(suspend_state_t state)
sysdev_resume();
}
device_power_up(PMSG_RESUME);
Done:
arch_suspend_enable_irqs();
BUG_ON(irqs_disabled());
Enable_cpus:
enable_nonboot_cpus();
Platfrom_finish:
if (suspend_ops->finish)
suspend_ops->finish();
Power_up_devices:
device_power_up(PMSG_RESUME);
Done:
device_pm_unlock();
return error;
}
@ -341,23 +367,8 @@ int suspend_devices_and_enter(suspend_state_t state)
if (suspend_test(TEST_DEVICES))
goto Recover_platform;
if (suspend_ops->prepare) {
error = suspend_ops->prepare();
if (error)
goto Resume_devices;
}
suspend_enter(state);
if (suspend_test(TEST_PLATFORM))
goto Finish;
error = disable_nonboot_cpus();
if (!error && !suspend_test(TEST_CPUS))
suspend_enter(state);
enable_nonboot_cpus();
Finish:
if (suspend_ops->finish)
suspend_ops->finish();
Resume_devices:
suspend_test_start();
device_resume(PMSG_RESUME);