Commit 53d8f670 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

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

* '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
parents 93c36ed8 8efb8c76

arch/x86/kernel/apm_32.c

+11 −4
Original line number Diff line number Diff line
@@ -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)

drivers/base/power/main.c

+11 −9
Original line number Diff line number Diff line
@@ -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);

drivers/base/sys.c

+8 −0
Original line number Diff line number Diff line
@@ -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) {

drivers/pci/pci-driver.c

+112 −65
Original line number Diff line number Diff line
@@ -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;



	if (drv && drv->suspend) {

		pci_power_t prev = pci_dev->current_state;



	pci_dev->state_saved = false;



		i = drv->suspend(pci_dev, state);

		suspend_report_result(drv->suspend, i);

		if (i)

			return i;

	if (drv && drv->suspend) {

		pci_power_t prev = pci_dev->current_state;

		int error;



		if (pci_dev->state_saved)

			goto Fixup;

		error = drv->suspend(pci_dev, state);

		suspend_report_result(drv->suspend, error);

		if (error)

			return error;



		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;
@@ -509,22 +532,12 @@ 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:
@@ -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 (pm->suspend_noirq) {

		pci_power_t prev = pci_dev->current_state;

		int 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);

	}



	if (!error)

	pci_pm_set_unknown_state(pci_dev);



	return error;

	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)

	if (!pci_dev->state_saved)

		pci_save_state(pci_dev);



	pci_pm_set_unknown_state(pci_dev);



	return error;

	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;

	}



	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;

	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;

	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) {

	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;

	}



	return error;

	if (!pci_dev->state_saved && !pci_is_bridge(pci_dev))

		pci_prepare_to_sleep(pci_dev);



	return 0;

}



static int pci_pm_restore_noirq(struct device *dev)

drivers/pci/pci.c

+65 −77
Original line number Diff line number Diff line
@@ -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);

	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

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