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Merge branch 'acpi-pm'

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* acpi-pm: (35 commits)
  ACPI / PM: Handle missing _PSC in acpi_bus_update_power()
  ACPI / PM: Do not power manage devices in unknown initial states
  ACPI / PM: Fix acpi_bus_get_device() check in drivers/acpi/device_pm.c
  ACPI / PM: Fix /proc/acpi/wakeup for devices w/o bus or parent
  ACPI / PM: Fix consistency check for power resources during resume
  ACPI / PM: Expose lists of device power resources to user space
  sysfs: Functions for adding/removing symlinks to/from attribute groups
  ACPI / PM: Expose current status of ACPI power resources
  ACPI / PM: Expose power states of ACPI devices to user space
  ACPI / scan: Prevent device add uevents from racing with user space
  ACPI / PM: Fix device power state value after transitions to D3cold
  ACPI / PM: Use string "D3cold" to represent ACPI_STATE_D3_COLD
  ACPI / PM: Sanitize checks in acpi_power_on_resources()
  ACPI / PM: Always evaluate _PSn after setting power resources
  ACPI / PM: Introduce helper for executing _PSn methods
  ACPI / PM: Make acpi_bus_init_power() more robust
  ACPI / PM: Fix build for unusual combination of Kconfig options
  ACPI / PM: remove leading whitespace from #ifdef
  ACPI / PM: Consolidate suspend-specific and hibernate-specific code
  ACPI / PM: Move device power management functions to device_pm.c
  ...
This commit is contained in:
Rafael J. Wysocki 2013-02-11 13:20:56 +01:00
commit a9834cb205
23 changed files with 1355 additions and 927 deletions
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13
Documentation/ABI/testing/sysfs-devices-power_resources_D0 Normal file
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@ -0,0 +1,13 @@
What: /sys/devices/.../power_resources_D0/
Date: January 2013
Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Description:
The /sys/devices/.../power_resources_D0/ directory is only
present for device objects representing ACPI device nodes that
use ACPI power resources for power management.
If present, it contains symbolic links to device directories
representing ACPI power resources that need to be turned on for
the given device node to be in ACPI power state D0. The names
of the links are the same as the names of the directories they
point to.

14
Documentation/ABI/testing/sysfs-devices-power_resources_D1 Normal file
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@ -0,0 +1,14 @@
What: /sys/devices/.../power_resources_D1/
Date: January 2013
Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Description:
The /sys/devices/.../power_resources_D1/ directory is only
present for device objects representing ACPI device nodes that
use ACPI power resources for power management and support ACPI
power state D1.
If present, it contains symbolic links to device directories
representing ACPI power resources that need to be turned on for
the given device node to be in ACPI power state D1. The names
of the links are the same as the names of the directories they
point to.

14
Documentation/ABI/testing/sysfs-devices-power_resources_D2 Normal file
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@ -0,0 +1,14 @@
What: /sys/devices/.../power_resources_D2/
Date: January 2013
Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Description:
The /sys/devices/.../power_resources_D2/ directory is only
present for device objects representing ACPI device nodes that
use ACPI power resources for power management and support ACPI
power state D2.
If present, it contains symbolic links to device directories
representing ACPI power resources that need to be turned on for
the given device node to be in ACPI power state D2. The names
of the links are the same as the names of the directories they
point to.

14
Documentation/ABI/testing/sysfs-devices-power_resources_D3hot Normal file
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@ -0,0 +1,14 @@
What: /sys/devices/.../power_resources_D3hot/
Date: January 2013
Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Description:
The /sys/devices/.../power_resources_D3hot/ directory is only
present for device objects representing ACPI device nodes that
use ACPI power resources for power management and support ACPI
power state D3hot.
If present, it contains symbolic links to device directories
representing ACPI power resources that need to be turned on for
the given device node to be in ACPI power state D3hot. The
names of the links are the same as the names of the directories
they point to.

20
Documentation/ABI/testing/sysfs-devices-power_state Normal file
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@ -0,0 +1,20 @@
What: /sys/devices/.../power_state
Date: January 2013
Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Description:
The /sys/devices/.../power_state attribute is only present for
device objects representing ACPI device nodes that provide power
management methods.
If present, it contains a string representing the current ACPI
power state of the given device node. Its possible values,
"D0", "D1", "D2", "D3hot", and "D3cold", reflect the power state
names defined by the ACPI specification (ACPI 4 and above).
If the device node uses shared ACPI power resources, this state
determines a list of power resources required not to be turned
off. However, some power resources needed by the device node in
higher-power (lower-number) states may also be ON because of
some other devices using them at the moment.
This attribute is read-only.

23
Documentation/ABI/testing/sysfs-devices-real_power_state Normal file
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@ -0,0 +1,23 @@
What: /sys/devices/.../real_power_state
Date: January 2013
Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Description:
The /sys/devices/.../real_power_state attribute is only present
for device objects representing ACPI device nodes that provide
power management methods and use ACPI power resources for power
management.
If present, it contains a string representing the real ACPI
power state of the given device node as returned by the _PSC
control method or inferred from the configuration of power
resources. Its possible values, "D0", "D1", "D2", "D3hot", and
"D3cold", reflect the power state names defined by the ACPI
specification (ACPI 4 and above).
In some situations the value of this attribute may be different
from the value of the /sys/devices/.../power_state attribute for
the same device object. If that happens, some shared power
resources used by the device node are only ON because of some
other devices using them at the moment.
This attribute is read-only.

12
Documentation/ABI/testing/sysfs-devices-resource_in_use Normal file
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@ -0,0 +1,12 @@
What: /sys/devices/.../resource_in_use
Date: January 2013
Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Description:
The /sys/devices/.../resource_in_use attribute is only present
for device objects representing ACPI power resources.
If present, it contains a number (0 or 1) representing the
current status of the given power resource (0 means that the
resource is not in use and therefore it has been turned off).
This attribute is read-only.

270
drivers/acpi/bus.c
View File

@ -178,276 +178,6 @@ int acpi_bus_get_private_data(acpi_handle handle, void **data)
}
EXPORT_SYMBOL(acpi_bus_get_private_data);
/* --------------------------------------------------------------------------
Power Management
-------------------------------------------------------------------------- */
static const char *state_string(int state)
{
switch (state) {
case ACPI_STATE_D0:
return "D0";
case ACPI_STATE_D1:
return "D1";
case ACPI_STATE_D2:
return "D2";
case ACPI_STATE_D3_HOT:
return "D3hot";
case ACPI_STATE_D3_COLD:
return "D3";
default:
return "(unknown)";
}
}
static int __acpi_bus_get_power(struct acpi_device *device, int *state)
{
int result = ACPI_STATE_UNKNOWN;
if (!device || !state)
return -EINVAL;
if (!device->flags.power_manageable) {
/* TBD: Non-recursive algorithm for walking up hierarchy. */
*state = device->parent ?
device->parent->power.state : ACPI_STATE_D0;
goto out;
}
/*
* Get the device's power state either directly (via _PSC) or
* indirectly (via power resources).
*/
if (device->power.flags.explicit_get) {
unsigned long long psc;
acpi_status status = acpi_evaluate_integer(device->handle,
"_PSC", NULL, &psc);
if (ACPI_FAILURE(status))
return -ENODEV;
result = psc;
}
/* The test below covers ACPI_STATE_UNKNOWN too. */
if (result <= ACPI_STATE_D2) {
; /* Do nothing. */
} else if (device->power.flags.power_resources) {
int error = acpi_power_get_inferred_state(device, &result);
if (error)
return error;
} else if (result == ACPI_STATE_D3_HOT) {
result = ACPI_STATE_D3;
}
/*
* If we were unsure about the device parent's power state up to this
* point, the fact that the device is in D0 implies that the parent has
* to be in D0 too.
*/
if (device->parent && device->parent->power.state == ACPI_STATE_UNKNOWN
&& result == ACPI_STATE_D0)
device->parent->power.state = ACPI_STATE_D0;
*state = result;
out:
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is %s\n",
device->pnp.bus_id, state_string(*state)));
return 0;
}
/**
* acpi_device_set_power - Set power state of an ACPI device.
* @device: Device to set the power state of.
* @state: New power state to set.
*
* Callers must ensure that the device is power manageable before using this
* function.
*/
int acpi_device_set_power(struct acpi_device *device, int state)
{
int result = 0;
acpi_status status = AE_OK;
char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' };
if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3_COLD))
return -EINVAL;
/* Make sure this is a valid target state */
if (state == device->power.state) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at %s\n",
state_string(state)));
return 0;
}
if (!device->power.states[state].flags.valid) {
printk(KERN_WARNING PREFIX "Device does not support %s\n",
state_string(state));
return -ENODEV;
}
if (device->parent && (state < device->parent->power.state)) {
printk(KERN_WARNING PREFIX
"Cannot set device to a higher-powered"
" state than parent\n");
return -ENODEV;
}
/* For D3cold we should execute _PS3, not _PS4. */
if (state == ACPI_STATE_D3_COLD)
object_name[3] = '3';
/*
* Transition Power
* ----------------
* On transitions to a high-powered state we first apply power (via
* power resources) then evalute _PSx. Conversly for transitions to
* a lower-powered state.
*/
if (state < device->power.state) {
if (device->power.state >= ACPI_STATE_D3_HOT &&
state != ACPI_STATE_D0) {
printk(KERN_WARNING PREFIX
"Cannot transition to non-D0 state from D3\n");
return -ENODEV;
}
if (device->power.flags.power_resources) {
result = acpi_power_transition(device, state);
if (result)
goto end;
}
if (device->power.states[state].flags.explicit_set) {
status = acpi_evaluate_object(device->handle,
object_name, NULL, NULL);
if (ACPI_FAILURE(status)) {
result = -ENODEV;
goto end;
}
}
} else {
if (device->power.states[state].flags.explicit_set) {
status = acpi_evaluate_object(device->handle,
object_name, NULL, NULL);
if (ACPI_FAILURE(status)) {
result = -ENODEV;
goto end;
}
}
if (device->power.flags.power_resources) {
result = acpi_power_transition(device, state);
if (result)
goto end;
}
}
end:
if (result)
printk(KERN_WARNING PREFIX
"Device [%s] failed to transition to %s\n",
device->pnp.bus_id, state_string(state));
else {
device->power.state = state;
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Device [%s] transitioned to %s\n",
device->pnp.bus_id, state_string(state)));
}
return result;
}
EXPORT_SYMBOL(acpi_device_set_power);
int acpi_bus_set_power(acpi_handle handle, int state)
{
struct acpi_device *device;
int result;
result = acpi_bus_get_device(handle, &device);
if (result)
return result;
if (!device->flags.power_manageable) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Device [%s] is not power manageable\n",
dev_name(&device->dev)));
return -ENODEV;
}
return acpi_device_set_power(device, state);
}
EXPORT_SYMBOL(acpi_bus_set_power);
int acpi_bus_init_power(struct acpi_device *device)
{
int state;
int result;
if (!device)
return -EINVAL;
device->power.state = ACPI_STATE_UNKNOWN;
result = __acpi_bus_get_power(device, &state);
if (result)
return result;
if (device->power.flags.power_resources)
result = acpi_power_on_resources(device, state);
if (!result)
device->power.state = state;
return result;
}
int acpi_bus_update_power(acpi_handle handle, int *state_p)
{
struct acpi_device *device;
int state;
int result;
result = acpi_bus_get_device(handle, &device);
if (result)
return result;
result = __acpi_bus_get_power(device, &state);
if (result)
return result;
result = acpi_device_set_power(device, state);
if (!result && state_p)
*state_p = state;
return result;
}
EXPORT_SYMBOL_GPL(acpi_bus_update_power);
bool acpi_bus_power_manageable(acpi_handle handle)
{
struct acpi_device *device;
int result;
result = acpi_bus_get_device(handle, &device);
return result ? false : device->flags.power_manageable;
}
EXPORT_SYMBOL(acpi_bus_power_manageable);
bool acpi_bus_can_wakeup(acpi_handle handle)
{
struct acpi_device *device;
int result;
result = acpi_bus_get_device(handle, &device);
return result ? false : device->wakeup.flags.valid;
}
EXPORT_SYMBOL(acpi_bus_can_wakeup);
static void acpi_print_osc_error(acpi_handle handle,
struct acpi_osc_context *context, char *error)
{

357
drivers/acpi/device_pm.c
View File

@ -30,6 +30,12 @@
#include <acpi/acpi.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
#include "internal.h"
#define _COMPONENT ACPI_POWER_COMPONENT
ACPI_MODULE_NAME("device_pm");
static DEFINE_MUTEX(acpi_pm_notifier_lock);
@ -93,6 +99,293 @@ acpi_status acpi_remove_pm_notifier(struct acpi_device *adev,
return status;
}
/**
* acpi_power_state_string - String representation of ACPI device power state.
* @state: ACPI device power state to return the string representation of.
*/
const char *acpi_power_state_string(int state)
{
switch (state) {
case ACPI_STATE_D0:
return "D0";
case ACPI_STATE_D1:
return "D1";
case ACPI_STATE_D2:
return "D2";
case ACPI_STATE_D3_HOT:
return "D3hot";
case ACPI_STATE_D3_COLD:
return "D3cold";
default:
return "(unknown)";
}
}
/**
* acpi_device_get_power - Get power state of an ACPI device.
* @device: Device to get the power state of.
* @state: Place to store the power state of the device.
*
* This function does not update the device's power.state field, but it may
* update its parent's power.state field (when the parent's power state is
* unknown and the device's power state turns out to be D0).
*/
int acpi_device_get_power(struct acpi_device *device, int *state)
{
int result = ACPI_STATE_UNKNOWN;
if (!device || !state)
return -EINVAL;
if (!device->flags.power_manageable) {
/* TBD: Non-recursive algorithm for walking up hierarchy. */
*state = device->parent ?
device->parent->power.state : ACPI_STATE_D0;
goto out;
}
/*
* Get the device's power state either directly (via _PSC) or
* indirectly (via power resources).
*/
if (device->power.flags.explicit_get) {
unsigned long long psc;
acpi_status status = acpi_evaluate_integer(device->handle,
"_PSC", NULL, &psc);
if (ACPI_FAILURE(status))
return -ENODEV;
result = psc;
}
/* The test below covers ACPI_STATE_UNKNOWN too. */
if (result <= ACPI_STATE_D2) {
; /* Do nothing. */
} else if (device->power.flags.power_resources) {
int error = acpi_power_get_inferred_state(device, &result);
if (error)
return error;
} else if (result == ACPI_STATE_D3_HOT) {
result = ACPI_STATE_D3;
}
/*
* If we were unsure about the device parent's power state up to this
* point, the fact that the device is in D0 implies that the parent has
* to be in D0 too.
*/
if (device->parent && device->parent->power.state == ACPI_STATE_UNKNOWN
&& result == ACPI_STATE_D0)
device->parent->power.state = ACPI_STATE_D0;
*state = result;
out:
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is %s\n",
device->pnp.bus_id, acpi_power_state_string(*state)));
return 0;
}
static int acpi_dev_pm_explicit_set(struct acpi_device *adev, int state)
{
if (adev->power.states[state].flags.explicit_set) {
char method[5] = { '_', 'P', 'S', '0' + state, '\0' };
acpi_status status;
status = acpi_evaluate_object(adev->handle, method, NULL, NULL);
if (ACPI_FAILURE(status))
return -ENODEV;
}
return 0;
}
/**
* acpi_device_set_power - Set power state of an ACPI device.
* @device: Device to set the power state of.
* @state: New power state to set.
*
* Callers must ensure that the device is power manageable before using this
* function.
*/
int acpi_device_set_power(struct acpi_device *device, int state)
{
int result = 0;
bool cut_power = false;
if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3_COLD))
return -EINVAL;
/* Make sure this is a valid target state */
if (state == device->power.state) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at %s\n",
acpi_power_state_string(state)));
return 0;
}
if (!device->power.states[state].flags.valid) {
printk(KERN_WARNING PREFIX "Device does not support %s\n",
acpi_power_state_string(state));
return -ENODEV;
}
if (device->parent && (state < device->parent->power.state)) {
printk(KERN_WARNING PREFIX
"Cannot set device to a higher-powered"
" state than parent\n");
return -ENODEV;
}
/* For D3cold we should first transition into D3hot. */
if (state == ACPI_STATE_D3_COLD
&& device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible) {
state = ACPI_STATE_D3_HOT;
cut_power = true;
}
if (state < device->power.state && state != ACPI_STATE_D0
&& device->power.state >= ACPI_STATE_D3_HOT) {
printk(KERN_WARNING PREFIX
"Cannot transition to non-D0 state from D3\n");
return -ENODEV;
}
/*
* Transition Power
* ----------------
* In accordance with the ACPI specification first apply power (via
* power resources) and then evalute _PSx.
*/
if (device->power.flags.power_resources) {
result = acpi_power_transition(device, state);
if (result)
goto end;
}
result = acpi_dev_pm_explicit_set(device, state);
if (result)
goto end;
if (cut_power) {
device->power.state = state;
state = ACPI_STATE_D3_COLD;
result = acpi_power_transition(device, state);
}
end:
if (result) {
printk(KERN_WARNING PREFIX
"Device [%s] failed to transition to %s\n",
device->pnp.bus_id,
acpi_power_state_string(state));
} else {
device->power.state = state;
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Device [%s] transitioned to %s\n",
device->pnp.bus_id,
acpi_power_state_string(state)));
}
return result;
}
EXPORT_SYMBOL(acpi_device_set_power);
int acpi_bus_set_power(acpi_handle handle, int state)
{
struct acpi_device *device;
int result;
result = acpi_bus_get_device(handle, &device);
if (result)
return result;
if (!device->flags.power_manageable) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Device [%s] is not power manageable\n",
dev_name(&device->dev)));
return -ENODEV;
}
return acpi_device_set_power(device, state);
}
EXPORT_SYMBOL(acpi_bus_set_power);
int acpi_bus_init_power(struct acpi_device *device)
{
int state;
int result;
if (!device)
return -EINVAL;
device->power.state = ACPI_STATE_UNKNOWN;
result = acpi_device_get_power(device, &state);
if (result)
return result;
if (state < ACPI_STATE_D3_COLD && device->power.flags.power_resources) {
result = acpi_power_on_resources(device, state);
if (result)
return result;
result = acpi_dev_pm_explicit_set(device, state);
if (result)
return result;
} else if (state == ACPI_STATE_UNKNOWN) {
/* No power resources and missing _PSC? Try to force D0. */
state = ACPI_STATE_D0;
result = acpi_dev_pm_explicit_set(device, state);
if (result)
return result;
}
device->power.state = state;
return 0;
}
int acpi_bus_update_power(acpi_handle handle, int *state_p)
{
struct acpi_device *device;
int state;
int result;
result = acpi_bus_get_device(handle, &device);
if (result)
return result;
result = acpi_device_get_power(device, &state);
if (result)
return result;
if (state == ACPI_STATE_UNKNOWN)
state = ACPI_STATE_D0;
result = acpi_device_set_power(device, state);
if (!result && state_p)
*state_p = state;
return result;
}
EXPORT_SYMBOL_GPL(acpi_bus_update_power);
bool acpi_bus_power_manageable(acpi_handle handle)
{
struct acpi_device *device;
int result;
result = acpi_bus_get_device(handle, &device);
return result ? false : device->flags.power_manageable;
}
EXPORT_SYMBOL(acpi_bus_power_manageable);
bool acpi_bus_can_wakeup(acpi_handle handle)
{
struct acpi_device *device;
int result;
result = acpi_bus_get_device(handle, &device);
return result ? false : device->wakeup.flags.valid;
}
EXPORT_SYMBOL(acpi_bus_can_wakeup);
/**
* acpi_device_power_state - Get preferred power state of ACPI device.
* @dev: Device whose preferred target power state to return.
@ -213,7 +506,7 @@ int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p, int d_max_in)
acpi_handle handle = DEVICE_ACPI_HANDLE(dev);
struct acpi_device *adev;
if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) {
if (!handle || acpi_bus_get_device(handle, &adev)) {
dev_dbg(dev, "ACPI handle without context in %s!\n", __func__);
return -ENODEV;
}
@ -290,7 +583,7 @@ int acpi_pm_device_run_wake(struct device *phys_dev, bool enable)
return -EINVAL;
handle = DEVICE_ACPI_HANDLE(phys_dev);
if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) {
if (!handle || acpi_bus_get_device(handle, &adev)) {
dev_dbg(phys_dev, "ACPI handle without context in %s!\n",
__func__);
return -ENODEV;
@ -304,7 +597,7 @@ static inline void acpi_wakeup_device(acpi_handle handle, u32 event,
void *context) {}
#endif /* CONFIG_PM_RUNTIME */
#ifdef CONFIG_PM_SLEEP
#ifdef CONFIG_PM_SLEEP
/**
* __acpi_device_sleep_wake - Enable or disable device to wake up the system.
* @dev: Device to enable/desible to wake up the system.
@ -334,7 +627,7 @@ int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
return -EINVAL;
handle = DEVICE_ACPI_HANDLE(dev);
if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) {
if (!handle || acpi_bus_get_device(handle, &adev)) {
dev_dbg(dev, "ACPI handle without context in %s!\n", __func__);
return -ENODEV;
}
@ -665,3 +958,59 @@ void acpi_dev_pm_detach(struct device *dev, bool power_off)
}
}
EXPORT_SYMBOL_GPL(acpi_dev_pm_detach);
/**
* acpi_dev_pm_add_dependent - Add physical device depending for PM.
* @handle: Handle of ACPI device node.
* @depdev: Device depending on that node for PM.
*/
void acpi_dev_pm_add_dependent(acpi_handle handle, struct device *depdev)
{
struct acpi_device_physical_node *dep;
struct acpi_device *adev;
if (!depdev || acpi_bus_get_device(handle, &adev))
return;
mutex_lock(&adev->physical_node_lock);
list_for_each_entry(dep, &adev->power_dependent, node)
if (dep->dev == depdev)
goto out;
dep = kzalloc(sizeof(*dep), GFP_KERNEL);
if (dep) {
dep->dev = depdev;
list_add_tail(&dep->node, &adev->power_dependent);
}
out:
mutex_unlock(&adev->physical_node_lock);
}
EXPORT_SYMBOL_GPL(acpi_dev_pm_add_dependent);
/**
* acpi_dev_pm_remove_dependent - Remove physical device depending for PM.
* @handle: Handle of ACPI device node.
* @depdev: Device depending on that node for PM.
*/
void acpi_dev_pm_remove_dependent(acpi_handle handle, struct device *depdev)
{
struct acpi_device_physical_node *dep;
struct acpi_device *adev;
if (!depdev || acpi_bus_get_device(handle, &adev))
return;
mutex_lock(&adev->physical_node_lock);
list_for_each_entry(dep, &adev->power_dependent, node)
if (dep->dev == depdev) {
list_del(&dep->node);
kfree(dep);
break;
}
mutex_unlock(&adev->physical_node_lock);
}
EXPORT_SYMBOL_GPL(acpi_dev_pm_remove_dependent);

20
drivers/acpi/internal.h
View File

@ -34,16 +34,34 @@ int acpi_debugfs_init(void);
static inline void acpi_debugfs_init(void) { return; }
#endif
/* --------------------------------------------------------------------------
Device Node Initialization / Removal
-------------------------------------------------------------------------- */
#define ACPI_STA_DEFAULT (ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | \
ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING)
int acpi_device_add(struct acpi_device *device,
void (*release)(struct device *));
void acpi_init_device_object(struct acpi_device *device, acpi_handle handle,
int type, unsigned long long sta);
void acpi_device_add_finalize(struct acpi_device *device);
void acpi_free_ids(struct acpi_device *device);
/* --------------------------------------------------------------------------
Power Resource
-------------------------------------------------------------------------- */
int acpi_power_init(void);
void acpi_power_resources_list_free(struct list_head *list);
int acpi_extract_power_resources(union acpi_object *package, unsigned int start,
struct list_head *list);
int acpi_add_power_resource(acpi_handle handle);
void acpi_power_add_remove_device(struct acpi_device *adev, bool add);
int acpi_power_min_system_level(struct list_head *list);
int acpi_device_sleep_wake(struct acpi_device *dev,
int enable, int sleep_state, int dev_state);
int acpi_power_get_inferred_state(struct acpi_device *device, int *state);
int acpi_power_on_resources(struct acpi_device *device, int state);
int acpi_power_transition(struct acpi_device *device, int state);
int acpi_bus_init_power(struct acpi_device *device);
int acpi_wakeup_device_init(void);
void acpi_early_processor_set_pdc(void);

778
drivers/acpi/power.c
View File

File diff suppressed because it is too large Load Diff

9
drivers/acpi/proc.c
View File

@ -311,11 +311,12 @@ acpi_system_wakeup_device_seq_show(struct seq_file *seq, void *offset)
dev->pnp.bus_id,
(u32) dev->wakeup.sleep_state);
if (!dev->physical_node_count)
if (!dev->physical_node_count) {
seq_printf(seq, "%c%-8s\n",
dev->wakeup.flags.run_wake ?
'*' : ' ', "disabled");
else {
dev->wakeup.flags.run_wake ? '*' : ' ',
device_may_wakeup(&dev->dev) ?
"enabled" : "disabled");
} else {
struct device *ldev;
list_for_each_entry(entry, &dev->physical_node_list,
node) {

466
drivers/acpi/scan.c
View File

@ -174,6 +174,32 @@ err_out:
}
EXPORT_SYMBOL(acpi_bus_hot_remove_device);
static ssize_t real_power_state_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct acpi_device *adev = to_acpi_device(dev);
int state;
int ret;
ret = acpi_device_get_power(adev, &state);
if (ret)
return ret;
return sprintf(buf, "%s\n", acpi_power_state_string(state));
}
static DEVICE_ATTR(real_power_state, 0444, real_power_state_show, NULL);
static ssize_t power_state_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct acpi_device *adev = to_acpi_device(dev);
return sprintf(buf, "%s\n", acpi_power_state_string(adev->power.state));
}
static DEVICE_ATTR(power_state, 0444, power_state_show, NULL);
static ssize_t
acpi_eject_store(struct device *d, struct device_attribute *attr,
const char *buf, size_t count)
@ -365,8 +391,22 @@ static int acpi_device_setup_files(struct acpi_device *dev)
* hot-removal function from userland.
*/
status = acpi_get_handle(dev->handle, "_EJ0", &temp);
if (ACPI_SUCCESS(status))
if (ACPI_SUCCESS(status)) {
result = device_create_file(&dev->dev, &dev_attr_eject);
if (result)
return result;
}
if (dev->flags.power_manageable) {
result = device_create_file(&dev->dev, &dev_attr_power_state);
if (result)
return result;
if (dev->power.flags.power_resources)
result = device_create_file(&dev->dev,
&dev_attr_real_power_state);
}
end:
return result;
}
@ -376,6 +416,13 @@ static void acpi_device_remove_files(struct acpi_device *dev)
acpi_status status;
acpi_handle temp;
if (dev->flags.power_manageable) {
device_remove_file(&dev->dev, &dev_attr_power_state);
if (dev->power.flags.power_resources)
device_remove_file(&dev->dev,
&dev_attr_real_power_state);
}
/*
* If device has _STR, remove 'description' file
*/
@ -460,7 +507,7 @@ int acpi_match_device_ids(struct acpi_device *device,
}
EXPORT_SYMBOL(acpi_match_device_ids);
static void acpi_free_ids(struct acpi_device *device)
void acpi_free_ids(struct acpi_device *device)
{
struct acpi_hardware_id *id, *tmp;
@ -468,6 +515,23 @@ static void acpi_free_ids(struct acpi_device *device)
kfree(id->id);
kfree(id);
}
kfree(device->pnp.unique_id);
}
static void acpi_free_power_resources_lists(struct acpi_device *device)
{
int i;
if (device->wakeup.flags.valid)
acpi_power_resources_list_free(&device->wakeup.resources);
if (!device->flags.power_manageable)
return;
for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) {
struct acpi_device_power_state *ps = &device->power.states[i];
acpi_power_resources_list_free(&ps->resources);
}
}
static void acpi_device_release(struct device *dev)
@ -475,7 +539,7 @@ static void acpi_device_release(struct device *dev)
struct acpi_device *acpi_dev = to_acpi_device(dev);
acpi_free_ids(acpi_dev);
kfree(acpi_dev->pnp.unique_id);
acpi_free_power_resources_lists(acpi_dev);
kfree(acpi_dev);
}
@ -613,12 +677,25 @@ struct bus_type acpi_bus_type = {
.uevent = acpi_device_uevent,
};
static int acpi_device_register(struct acpi_device *device)
int acpi_device_add(struct acpi_device *device,
void (*release)(struct device *))
{
int result;
struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id;
int found = 0;
if (device->handle) {
acpi_status status;
status = acpi_attach_data(device->handle, acpi_bus_data_handler,
device);
if (ACPI_FAILURE(status)) {
acpi_handle_err(device->handle,
"Unable to attach device data\n");
return -ENODEV;
}
}
/*
* Linkage
* -------
@ -629,11 +706,13 @@ static int acpi_device_register(struct acpi_device *device)
INIT_LIST_HEAD(&device->wakeup_list);
INIT_LIST_HEAD(&device->physical_node_list);
mutex_init(&device->physical_node_lock);
INIT_LIST_HEAD(&device->power_dependent);
new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL);
if (!new_bus_id) {
printk(KERN_ERR PREFIX "Memory allocation error\n");
return -ENOMEM;
pr_err(PREFIX "Memory allocation error\n");
result = -ENOMEM;
goto err_detach;
}
mutex_lock(&acpi_device_lock);
@ -668,11 +747,11 @@ static int acpi_device_register(struct acpi_device *device)
if (device->parent)
device->dev.parent = &device->parent->dev;
device->dev.bus = &acpi_bus_type;
device->dev.release = &acpi_device_release;
result = device_register(&device->dev);
device->dev.release = release;
result = device_add(&device->dev);
if (result) {
dev_err(&device->dev, "Error registering device\n");
goto end;
goto err;
}
result = acpi_device_setup_files(device);
@ -682,12 +761,16 @@ static int acpi_device_register(struct acpi_device *device)
device->removal_type = ACPI_BUS_REMOVAL_NORMAL;
return 0;
end:
err:
mutex_lock(&acpi_device_lock);
if (device->parent)
list_del(&device->node);
list_del(&device->wakeup_list);
mutex_unlock(&acpi_device_lock);
err_detach:
acpi_detach_data(device->handle, acpi_bus_data_handler);
return result;
}
@ -702,8 +785,18 @@ static void acpi_device_unregister(struct acpi_device *device)
acpi_detach_data(device->handle, acpi_bus_data_handler);
acpi_power_add_remove_device(device, false);
acpi_device_remove_files(device);
device_unregister(&device->dev);
if (device->remove)
device->remove(device);
device_del(&device->dev);
/*
* Drop the reference counts of all power resources the device depends
* on and turn off the ones that have no more references.
*/
acpi_power_transition(device, ACPI_STATE_D3_COLD);
put_device(&device->dev);
}
/* --------------------------------------------------------------------------
@ -846,52 +939,43 @@ void acpi_bus_data_handler(acpi_handle handle, void *context)
return;
}
static int acpi_bus_get_perf_flags(struct acpi_device *device)
{
device->performance.state = ACPI_STATE_UNKNOWN;
return 0;
}
static acpi_status
acpi_bus_extract_wakeup_device_power_package(acpi_handle handle,
struct acpi_device_wakeup *wakeup)
static int acpi_bus_extract_wakeup_device_power_package(acpi_handle handle,
struct acpi_device_wakeup *wakeup)
{
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *package = NULL;
union acpi_object *element = NULL;
acpi_status status;
int i = 0;
int err = -ENODATA;
if (!wakeup)
return AE_BAD_PARAMETER;
return -EINVAL;
INIT_LIST_HEAD(&wakeup->resources);
/* _PRW */
status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW"));
return status;
return err;
}
package = (union acpi_object *)buffer.pointer;
if (!package || (package->package.count < 2)) {
status = AE_BAD_DATA;
if (!package || package->package.count < 2)
goto out;
}
element = &(package->package.elements[0]);
if (!element) {
status = AE_BAD_DATA;
if (!element)
goto out;
}
if (element->type == ACPI_TYPE_PACKAGE) {
if ((element->package.count < 2) ||
(element->package.elements[0].type !=
ACPI_TYPE_LOCAL_REFERENCE)
|| (element->package.elements[1].type != ACPI_TYPE_INTEGER)) {
status = AE_BAD_DATA;
|| (element->package.elements[1].type != ACPI_TYPE_INTEGER))
goto out;
}
wakeup->gpe_device =
element->package.elements[0].reference.handle;
wakeup->gpe_number =
@ -900,38 +984,35 @@ acpi_bus_extract_wakeup_device_power_package(acpi_handle handle,
wakeup->gpe_device = NULL;
wakeup->gpe_number = element->integer.value;
} else {
status = AE_BAD_DATA;
goto out;
}
element = &(package->package.elements[1]);
if (element->type != ACPI_TYPE_INTEGER) {
status = AE_BAD_DATA;
if (element->type != ACPI_TYPE_INTEGER)
goto out;
}
wakeup->sleep_state = element->integer.value;
if ((package->package.count - 2) > ACPI_MAX_HANDLES) {
status = AE_NO_MEMORY;
err = acpi_extract_power_resources(package, 2, &wakeup->resources);
if (err)
goto out;
}
wakeup->resources.count = package->package.count - 2;
for (i = 0; i < wakeup->resources.count; i++) {
element = &(package->package.elements[i + 2]);
if (element->type != ACPI_TYPE_LOCAL_REFERENCE) {
status = AE_BAD_DATA;
goto out;
if (!list_empty(&wakeup->resources)) {
int sleep_state;
sleep_state = acpi_power_min_system_level(&wakeup->resources);
if (sleep_state < wakeup->sleep_state) {
acpi_handle_warn(handle, "Overriding _PRW sleep state "
"(S%d) by S%d from power resources\n",
(int)wakeup->sleep_state, sleep_state);
wakeup->sleep_state = sleep_state;
}
wakeup->resources.handles[i] = element->reference.handle;
}
acpi_setup_gpe_for_wake(handle, wakeup->gpe_device, wakeup->gpe_number);
out:
kfree(buffer.pointer);
return status;
return err;
}
static void acpi_bus_set_run_wake_flags(struct acpi_device *device)
@ -971,17 +1052,17 @@ static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
{
acpi_handle temp;
acpi_status status = 0;
int psw_error;
int err;
/* Presence of _PRW indicates wake capable */
status = acpi_get_handle(device->handle, "_PRW", &temp);
if (ACPI_FAILURE(status))
return;
status = acpi_bus_extract_wakeup_device_power_package(device->handle,
&device->wakeup);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package"));
err = acpi_bus_extract_wakeup_device_power_package(device->handle,
&device->wakeup);
if (err) {
dev_err(&device->dev, "_PRW evaluation error: %d\n", err);
return;
}
@ -994,20 +1075,73 @@ static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
* So it is necessary to call _DSW object first. Only when it is not
* present will the _PSW object used.
*/
psw_error = acpi_device_sleep_wake(device, 0, 0, 0);
if (psw_error)
err = acpi_device_sleep_wake(device, 0, 0, 0);
if (err)
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"error in _DSW or _PSW evaluation\n"));
}
static void acpi_bus_add_power_resource(acpi_handle handle);
static int acpi_bus_get_power_flags(struct acpi_device *device)
static void acpi_bus_init_power_state(struct acpi_device *device, int state)
{
acpi_status status = 0;
acpi_handle handle = NULL;
u32 i = 0;
struct acpi_device_power_state *ps = &device->power.states[state];
char pathname[5] = { '_', 'P', 'R', '0' + state, '\0' };
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
acpi_handle handle;
acpi_status status;
INIT_LIST_HEAD(&ps->resources);
/* Evaluate "_PRx" to get referenced power resources */
status = acpi_evaluate_object(device->handle, pathname, NULL, &buffer);
if (ACPI_SUCCESS(status)) {
union acpi_object *package = buffer.pointer;
if (buffer.length && package
&& package->type == ACPI_TYPE_PACKAGE
&& package->package.count) {
int err = acpi_extract_power_resources(package, 0,
&ps->resources);
if (!err)
device->power.flags.power_resources = 1;
}
ACPI_FREE(buffer.pointer);
}
/* Evaluate "_PSx" to see if we can do explicit sets */
pathname[2] = 'S';
status = acpi_get_handle(device->handle, pathname, &handle);
if (ACPI_SUCCESS(status))
ps->flags.explicit_set = 1;
/*
* State is valid if there are means to put the device into it.
* D3hot is only valid if _PR3 present.
*/
if (!list_empty(&ps->resources)
|| (ps->flags.explicit_set && state < ACPI_STATE_D3_HOT)) {
ps->flags.valid = 1;
ps->flags.os_accessible = 1;
}
ps->power = -1; /* Unknown - driver assigned */
ps->latency = -1; /* Unknown - driver assigned */
}
static void acpi_bus_get_power_flags(struct acpi_device *device)
{
acpi_status status;
acpi_handle handle;
u32 i;
/* Presence of _PS0|_PR0 indicates 'power manageable' */
status = acpi_get_handle(device->handle, "_PS0", &handle);
if (ACPI_FAILURE(status)) {
status = acpi_get_handle(device->handle, "_PR0", &handle);
if (ACPI_FAILURE(status))
return;
}
device->flags.power_manageable = 1;
/*
* Power Management Flags
@ -1022,40 +1156,10 @@ static int acpi_bus_get_power_flags(struct acpi_device *device)
/*
* Enumerate supported power management states
*/
for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) {
struct acpi_device_power_state *ps = &device->power.states[i];
char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' };
for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++)
acpi_bus_init_power_state(device, i);
/* Evaluate "_PRx" to se if power resources are referenced */
acpi_evaluate_reference(device->handle, object_name, NULL,
&ps->resources);
if (ps->resources.count) {
int j;
device->power.flags.power_resources = 1;
for (j = 0; j < ps->resources.count; j++)
acpi_bus_add_power_resource(ps->resources.handles[j]);
}
/* Evaluate "_PSx" to see if we can do explicit sets */
object_name[2] = 'S';
status = acpi_get_handle(device->handle, object_name, &handle);
if (ACPI_SUCCESS(status))
ps->flags.explicit_set = 1;
/*
* State is valid if there are means to put the device into it.
* D3hot is only valid if _PR3 present.
*/
if (ps->resources.count ||
(ps->flags.explicit_set && i < ACPI_STATE_D3_HOT)) {
ps->flags.valid = 1;
ps->flags.os_accessible = 1;
}
ps->power = -1; /* Unknown - driver assigned */
ps->latency = -1; /* Unknown - driver assigned */
}
INIT_LIST_HEAD(&device->power.states[ACPI_STATE_D3_COLD].resources);
/* Set defaults for D0 and D3 states (always valid) */
device->power.states[ACPI_STATE_D0].flags.valid = 1;
@ -1072,17 +1176,17 @@ static int acpi_bus_get_power_flags(struct acpi_device *device)
device->power.flags.power_resources)
device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible = 1;
acpi_bus_init_power(device);
return 0;
if (acpi_bus_init_power(device)) {
acpi_free_power_resources_lists(device);
device->flags.power_manageable = 0;
}
}
static int acpi_bus_get_flags(struct acpi_device *device)
static void acpi_bus_get_flags(struct acpi_device *device)
{
acpi_status status = AE_OK;
acpi_handle temp = NULL;
/* Presence of _STA indicates 'dynamic_status' */
status = acpi_get_handle(device->handle, "_STA", &temp);
if (ACPI_SUCCESS(status))
@ -1102,21 +1206,6 @@ static int acpi_bus_get_flags(struct acpi_device *device)
if (ACPI_SUCCESS(status))
device->flags.ejectable = 1;
}
/* Power resources cannot be power manageable. */
if (device->device_type == ACPI_BUS_TYPE_POWER)
return 0;
/* Presence of _PS0|_PR0 indicates 'power manageable' */
status = acpi_get_handle(device->handle, "_PS0", &temp);
if (ACPI_FAILURE(status))
status = acpi_get_handle(device->handle, "_PR0", &temp);
if (ACPI_SUCCESS(status))
device->flags.power_manageable = 1;
/* TBD: Performance management */
return 0;
}
static void acpi_device_get_busid(struct acpi_device *device)
@ -1341,27 +1430,25 @@ static void acpi_device_set_id(struct acpi_device *device)
}
}
static int acpi_device_set_context(struct acpi_device *device)
void acpi_init_device_object(struct acpi_device *device, acpi_handle handle,
int type, unsigned long long sta)
{
acpi_status status;
INIT_LIST_HEAD(&device->pnp.ids);
device->device_type = type;
device->handle = handle;
device->parent = acpi_bus_get_parent(handle);
STRUCT_TO_INT(device->status) = sta;
acpi_device_get_busid(device);
acpi_device_set_id(device);
acpi_bus_get_flags(device);
device_initialize(&device->dev);
dev_set_uevent_suppress(&device->dev, true);
}
/*
* Context
* -------
* Attach this 'struct acpi_device' to the ACPI object. This makes
* resolutions from handle->device very efficient. Fixed hardware
* devices have no handles, so we skip them.
*/
if (!device->handle)
return 0;
status = acpi_attach_data(device->handle,
acpi_bus_data_handler, device);
if (ACPI_SUCCESS(status))
return 0;
printk(KERN_ERR PREFIX "Error attaching device data\n");
return -ENODEV;
void acpi_device_add_finalize(struct acpi_device *device)
{
dev_set_uevent_suppress(&device->dev, false);
kobject_uevent(&device->dev.kobj, KOBJ_ADD);
}
static int acpi_add_single_object(struct acpi_device **child,
@ -1378,90 +1465,26 @@ static int acpi_add_single_object(struct acpi_device **child,
return -ENOMEM;
}
INIT_LIST_HEAD(&device->pnp.ids);
device->device_type = type;
device->handle = handle;
device->parent = acpi_bus_get_parent(handle);
STRUCT_TO_INT(device->status) = sta;
acpi_device_get_busid(device);
/*
* Flags
* -----
* Note that we only look for object handles -- cannot evaluate objects
* until we know the device is present and properly initialized.
*/
result = acpi_bus_get_flags(device);
if (result)
goto end;
/*
* Initialize Device
* -----------------
* TBD: Synch with Core's enumeration/initialization process.
*/
acpi_device_set_id(device);
/*
* Power Management
* ----------------
*/
if (device->flags.power_manageable) {
result = acpi_bus_get_power_flags(device);
if (result)
goto end;
}
/*
* Wakeup device management
*-----------------------
*/
acpi_init_device_object(device, handle, type, sta);
acpi_bus_get_power_flags(device);
acpi_bus_get_wakeup_device_flags(device);
/*
* Performance Management
* ----------------------
*/
if (device->flags.performance_manageable) {
result = acpi_bus_get_perf_flags(device);
if (result)
goto end;
device->flags.match_driver = match_driver;
result = acpi_device_add(device, acpi_device_release);
if (result) {
acpi_device_release(&device->dev);
return result;
}
if ((result = acpi_device_set_context(device)))
goto end;
device->flags.match_driver = match_driver;
result = acpi_device_register(device);
end:
if (!result) {
acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Adding %s [%s] parent %s\n", dev_name(&device->dev),
(char *) buffer.pointer,
device->parent ? dev_name(&device->parent->dev) :
"(null)"));
kfree(buffer.pointer);
*child = device;
} else
acpi_device_release(&device->dev);
return result;
}
#define ACPI_STA_DEFAULT (ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | \
ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING)
static void acpi_bus_add_power_resource(acpi_handle handle)
{
struct acpi_device *device = NULL;
acpi_bus_get_device(handle, &device);
if (!device)
acpi_add_single_object(&device, handle, ACPI_BUS_TYPE_POWER,
ACPI_STA_DEFAULT, true);
acpi_power_add_remove_device(device, true);
acpi_device_add_finalize(device);
acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Added %s [%s] parent %s\n",
dev_name(&device->dev), (char *) buffer.pointer,
device->parent ? dev_name(&device->parent->dev) : "(null)"));
kfree(buffer.pointer);
*child = device;
return 0;
}
static int acpi_bus_type_and_status(acpi_handle handle, int *type,
@ -1520,20 +1543,26 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used,
if (result)
return AE_OK;
if (type == ACPI_BUS_TYPE_POWER) {
acpi_add_power_resource(handle);
return AE_OK;
}
if (!(sta & ACPI_STA_DEVICE_PRESENT) &&
!(sta & ACPI_STA_DEVICE_FUNCTIONING)) {
struct acpi_device_wakeup wakeup;
acpi_handle temp;
status = acpi_get_handle(handle, "_PRW", &temp);
if (ACPI_SUCCESS(status))
if (ACPI_SUCCESS(status)) {
acpi_bus_extract_wakeup_device_power_package(handle,
&wakeup);
acpi_power_resources_list_free(&wakeup.resources);
}
return AE_CTRL_DEPTH;
}
acpi_add_single_object(&device, handle, type, sta,
type == ACPI_BUS_TYPE_POWER);
acpi_add_single_object(&device, handle, type, sta, false);
if (!device)
return AE_CTRL_DEPTH;
@ -1687,7 +1716,6 @@ int __init acpi_scan_init(void)
printk(KERN_ERR PREFIX "Could not register bus type\n");
}
acpi_power_init();
acpi_pci_root_init();
/*

89
drivers/acpi/sleep.c
View File

@ -386,6 +386,8 @@ static void acpi_pm_finish(void)
acpi_target_sleep_state = ACPI_STATE_S0;
acpi_resume_power_resources();
/* If we were woken with the fixed power button, provide a small
* hint to userspace in the form of a wakeup event on the fixed power
* button device (if it can be found).
@ -577,7 +579,28 @@ static const struct platform_suspend_ops acpi_suspend_ops_old = {
.end = acpi_pm_end,
.recover = acpi_pm_finish,
};
#endif /* CONFIG_SUSPEND */
static void acpi_sleep_suspend_setup(void)
{
int i;
for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) {
acpi_status status;
u8 type_a, type_b;
status = acpi_get_sleep_type_data(i, &type_a, &type_b);
if (ACPI_SUCCESS(status)) {
sleep_states[i] = 1;
pr_cont(" S%d", i);
}
}
suspend_set_ops(old_suspend_ordering ?
&acpi_suspend_ops_old : &acpi_suspend_ops);
}
#else /* !CONFIG_SUSPEND */
static inline void acpi_sleep_suspend_setup(void) {}
#endif /* !CONFIG_SUSPEND */
#ifdef CONFIG_HIBERNATION
static unsigned long s4_hardware_signature;
@ -698,7 +721,30 @@ static const struct platform_hibernation_ops acpi_hibernation_ops_old = {
.restore_cleanup = acpi_pm_thaw,
.recover = acpi_pm_finish,
};
#endif /* CONFIG_HIBERNATION */
static void acpi_sleep_hibernate_setup(void)
{
acpi_status status;
u8 type_a, type_b;
status = acpi_get_sleep_type_data(ACPI_STATE_S4, &type_a, &type_b);
if (ACPI_FAILURE(status))
return;
hibernation_set_ops(old_suspend_ordering ?
&acpi_hibernation_ops_old : &acpi_hibernation_ops);
sleep_states[ACPI_STATE_S4] = 1;
pr_cont(KERN_CONT " S4");
if (nosigcheck)
return;
acpi_get_table(ACPI_SIG_FACS, 1, (struct acpi_table_header **)&facs);
if (facs)
s4_hardware_signature = facs->hardware_signature;
}
#else /* !CONFIG_HIBERNATION */
static inline void acpi_sleep_hibernate_setup(void) {}
#endif /* !CONFIG_HIBERNATION */
int acpi_suspend(u32 acpi_state)
{
@ -734,9 +780,6 @@ int __init acpi_sleep_init(void)
{
acpi_status status;
u8 type_a, type_b;
#ifdef CONFIG_SUSPEND
int i = 0;
#endif
if (acpi_disabled)
return 0;
@ -744,45 +787,19 @@ int __init acpi_sleep_init(void)
acpi_sleep_dmi_check();
sleep_states[ACPI_STATE_S0] = 1;
printk(KERN_INFO PREFIX "(supports S0");
pr_info(PREFIX "(supports S0");
#ifdef CONFIG_SUSPEND
for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) {
status = acpi_get_sleep_type_data(i, &type_a, &type_b);
if (ACPI_SUCCESS(status)) {
sleep_states[i] = 1;
printk(KERN_CONT " S%d", i);
}
}
acpi_sleep_suspend_setup();
acpi_sleep_hibernate_setup();
suspend_set_ops(old_suspend_ordering ?
&acpi_suspend_ops_old : &acpi_suspend_ops);
#endif
#ifdef CONFIG_HIBERNATION
status = acpi_get_sleep_type_data(ACPI_STATE_S4, &type_a, &type_b);
if (ACPI_SUCCESS(status)) {
hibernation_set_ops(old_suspend_ordering ?
&acpi_hibernation_ops_old : &acpi_hibernation_ops);
sleep_states[ACPI_STATE_S4] = 1;
printk(KERN_CONT " S4");
if (!nosigcheck) {
acpi_get_table(ACPI_SIG_FACS, 1,
(struct acpi_table_header **)&facs);
if (facs)
s4_hardware_signature =
facs->hardware_signature;
}
}
#endif
status = acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b);
if (ACPI_SUCCESS(status)) {
sleep_states[ACPI_STATE_S5] = 1;
printk(KERN_CONT " S5");
pr_cont(" S5");
pm_power_off_prepare = acpi_power_off_prepare;
pm_power_off = acpi_power_off;
}
printk(KERN_CONT ")\n");
pr_cont(")\n");
/*
* Register the tts_notifier to reboot notifier list so that the _TTS
* object can also be evaluated when the system enters S5.

2
drivers/acpi/sleep.h
View File

@ -6,3 +6,5 @@ extern void acpi_disable_wakeup_devices(u8 sleep_state);
extern struct list_head acpi_wakeup_device_list;
extern struct mutex acpi_device_lock;
extern void acpi_resume_power_resources(void);

18
drivers/ata/libata-acpi.c
View File

@ -1029,30 +1029,20 @@ static void ata_acpi_register_power_resource(struct ata_device *dev)
{
struct scsi_device *sdev = dev->sdev;
acpi_handle handle;
struct device *device;
handle = ata_dev_acpi_handle(dev);
if (!handle)
return;
device = &sdev->sdev_gendev;
acpi_power_resource_register_device(device, handle);
if (handle)
acpi_dev_pm_remove_dependent(handle, &sdev->sdev_gendev);
}
static void ata_acpi_unregister_power_resource(struct ata_device *dev)
{
struct scsi_device *sdev = dev->sdev;
acpi_handle handle;
struct device *device;
handle = ata_dev_acpi_handle(dev);
if (!handle)
return;
device = &sdev->sdev_gendev;
acpi_power_resource_unregister_device(device, handle);
if (handle)
acpi_dev_pm_remove_dependent(handle, &sdev->sdev_gendev);
}
void ata_acpi_bind(struct ata_device *dev)

2
drivers/pci/pci-acpi.c
View File

@ -345,7 +345,6 @@ static void pci_acpi_setup(struct device *dev)
acpi_pci_irq_add_prt(handle, pci_domain_nr(pci_dev->bus), bus);
}
acpi_power_resource_register_device(dev, handle);
if (acpi_bus_get_device(handle, &adev) || !adev->wakeup.flags.valid)
return;
@ -368,7 +367,6 @@ static void pci_acpi_cleanup(struct device *dev)
device_set_run_wake(dev, false);
pci_acpi_remove_pm_notifier(adev);
}
acpi_power_resource_unregister_device(dev, handle);
if (pci_dev->subordinate)
acpi_pci_irq_del_prt(pci_domain_nr(pci_dev->bus),

42
fs/sysfs/group.c
View File

@ -205,6 +205,48 @@ void sysfs_unmerge_group(struct kobject *kobj,
}
EXPORT_SYMBOL_GPL(sysfs_unmerge_group);
/**
* sysfs_add_link_to_group - add a symlink to an attribute group.
* @kobj: The kobject containing the group.
* @group_name: The name of the group.
* @target: The target kobject of the symlink to create.
* @link_name: The name of the symlink to create.
*/
int sysfs_add_link_to_group(struct kobject *kobj, const char *group_name,
struct kobject *target, const char *link_name)
{
struct sysfs_dirent *dir_sd;
int error = 0;
dir_sd = sysfs_get_dirent(kobj->sd, NULL, group_name);
if (!dir_sd)
return -ENOENT;
error = sysfs_create_link_sd(dir_sd, target, link_name);
sysfs_put(dir_sd);
return error;
}
EXPORT_SYMBOL_GPL(sysfs_add_link_to_group);
/**
* sysfs_remove_link_from_group - remove a symlink from an attribute group.
* @kobj: The kobject containing the group.
* @group_name: The name of the group.
* @link_name: The name of the symlink to remove.
*/
void sysfs_remove_link_from_group(struct kobject *kobj, const char *group_name,
const char *link_name)
{
struct sysfs_dirent *dir_sd;
dir_sd = sysfs_get_dirent(kobj->sd, NULL, group_name);
if (dir_sd) {
sysfs_hash_and_remove(dir_sd, NULL, link_name);
sysfs_put(dir_sd);
}
}
EXPORT_SYMBOL_GPL(sysfs_remove_link_from_group);
EXPORT_SYMBOL_GPL(sysfs_create_group);
EXPORT_SYMBOL_GPL(sysfs_update_group);

45
fs/sysfs/symlink.c
View File

@ -21,26 +21,17 @@
#include "sysfs.h"
static int sysfs_do_create_link(struct kobject *kobj, struct kobject *target,
const char *name, int warn)
static int sysfs_do_create_link_sd(struct sysfs_dirent *parent_sd,
struct kobject *target,
const char *name, int warn)
{
struct sysfs_dirent *parent_sd = NULL;
struct sysfs_dirent *target_sd = NULL;
struct sysfs_dirent *sd = NULL;
struct sysfs_addrm_cxt acxt;
enum kobj_ns_type ns_type;
int error;
BUG_ON(!name);
if (!kobj)
parent_sd = &sysfs_root;
else
parent_sd = kobj->sd;
error = -EFAULT;
if (!parent_sd)
goto out_put;
BUG_ON(!name || !parent_sd);
/* target->sd can go away beneath us but is protected with
* sysfs_assoc_lock. Fetch target_sd from it.
@ -95,6 +86,34 @@ static int sysfs_do_create_link(struct kobject *kobj, struct kobject *target,
return error;
}
/**
* sysfs_create_link_sd - create symlink to a given object.
* @sd: directory we're creating the link in.
* @target: object we're pointing to.
* @name: name of the symlink.
*/
int sysfs_create_link_sd(struct sysfs_dirent *sd, struct kobject *target,
const char *name)
{
return sysfs_do_create_link_sd(sd, target, name, 1);
}
static int sysfs_do_create_link(struct kobject *kobj, struct kobject *target,
const char *name, int warn)
{
struct sysfs_dirent *parent_sd = NULL;
if (!kobj)
parent_sd = &sysfs_root;
else
parent_sd = kobj->sd;
if (!parent_sd)
return -EFAULT;
return sysfs_do_create_link_sd(parent_sd, target, name, warn);
}
/**
* sysfs_create_link - create symlink between two objects.
* @kobj: object whose directory we're creating the link in.

2
fs/sysfs/sysfs.h
View File

@ -240,3 +240,5 @@ void unmap_bin_file(struct sysfs_dirent *attr_sd);
* symlink.c
*/
extern const struct inode_operations sysfs_symlink_inode_operations;
int sysfs_create_link_sd(struct sysfs_dirent *sd, struct kobject *target,
const char *name);

54
include/acpi/acpi_bus.h
View File

@ -199,7 +199,7 @@ struct acpi_device_power_state {
} flags;
int power; /* % Power (compared to D0) */
int latency; /* Dx->D0 time (microseconds) */
struct acpi_handle_list resources; /* Power resources referenced */
struct list_head resources; /* Power resources referenced */
};
struct acpi_device_power {
@ -242,7 +242,7 @@ struct acpi_device_wakeup {
acpi_handle gpe_device;
u64 gpe_number;
u64 sleep_state;
struct acpi_handle_list resources;
struct list_head resources;
struct acpi_device_wakeup_flags flags;
int prepare_count;
};
@ -279,6 +279,8 @@ struct acpi_device {
struct list_head physical_node_list;
struct mutex physical_node_lock;
DECLARE_BITMAP(physical_node_id_bitmap, ACPI_MAX_PHYSICAL_NODE);
struct list_head power_dependent;
void (*remove)(struct acpi_device *);
};
static inline void *acpi_driver_data(struct acpi_device *d)
@ -329,13 +331,51 @@ void acpi_bus_data_handler(acpi_handle handle, void *context);
acpi_status acpi_bus_get_status_handle(acpi_handle handle,
unsigned long long *sta);
int acpi_bus_get_status(struct acpi_device *device);
#ifdef CONFIG_PM
int acpi_bus_set_power(acpi_handle handle, int state);
const char *acpi_power_state_string(int state);
int acpi_device_get_power(struct acpi_device *device, int *state);
int acpi_device_set_power(struct acpi_device *device, int state);
int acpi_bus_init_power(struct acpi_device *device);
int acpi_bus_update_power(acpi_handle handle, int *state_p);
bool acpi_bus_power_manageable(acpi_handle handle);
bool acpi_bus_can_wakeup(acpi_handle handle);
int acpi_power_resource_register_device(struct device *dev, acpi_handle handle);
void acpi_power_resource_unregister_device(struct device *dev, acpi_handle handle);
#else /* !CONFIG_PM */
static inline int acpi_bus_set_power(acpi_handle handle, int state)
{
return 0;
}
static inline const char *acpi_power_state_string(int state)
{
return "D0";
}
static inline int acpi_device_get_power(struct acpi_device *device, int *state)
{
return 0;
}
static inline int acpi_device_set_power(struct acpi_device *device, int state)
{
return 0;
}
static inline int acpi_bus_init_power(struct acpi_device *device)
{
return 0;
}
static inline int acpi_bus_update_power(acpi_handle handle, int *state_p)
{
return 0;
}
static inline bool acpi_bus_power_manageable(acpi_handle handle)
{
return false;
}
static inline bool acpi_bus_can_wakeup(acpi_handle handle)
{
return false;
}
#endif /* !CONFIG_PM */
#ifdef CONFIG_ACPI_PROC_EVENT
int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data);
int acpi_bus_generate_proc_event4(const char *class, const char *bid, u8 type, int data);
@ -414,6 +454,8 @@ acpi_status acpi_remove_pm_notifier(struct acpi_device *adev,
int acpi_device_power_state(struct device *dev, struct acpi_device *adev,
u32 target_state, int d_max_in, int *d_min_p);
int acpi_pm_device_sleep_state(struct device *, int *, int);
void acpi_dev_pm_add_dependent(acpi_handle handle, struct device *depdev);
void acpi_dev_pm_remove_dependent(acpi_handle handle, struct device *depdev);
#else
static inline acpi_status acpi_add_pm_notifier(struct acpi_device *adev,
acpi_notify_handler handler,
@ -443,6 +485,10 @@ static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m)
{
return __acpi_device_power_state(m, p);
}
static inline void acpi_dev_pm_add_dependent(acpi_handle handle,
struct device *depdev) {}
static inline void acpi_dev_pm_remove_dependent(acpi_handle handle,
struct device *depdev) {}
#endif
#ifdef CONFIG_PM_RUNTIME

2
include/linux/acpi.h
View File

@ -516,7 +516,7 @@ static inline int acpi_subsys_runtime_suspend(struct device *dev) { return 0; }
static inline int acpi_subsys_runtime_resume(struct device *dev) { return 0; }
#endif
#ifdef CONFIG_ACPI_SLEEP
#if defined(CONFIG_ACPI) && defined(CONFIG_PM_SLEEP)
int acpi_dev_suspend_late(struct device *dev);
int acpi_dev_resume_early(struct device *dev);
int acpi_subsys_prepare(struct device *dev);

16
include/linux/sysfs.h
View File

@ -181,6 +181,10 @@ int sysfs_merge_group(struct kobject *kobj,
const struct attribute_group *grp);
void sysfs_unmerge_group(struct kobject *kobj,
const struct attribute_group *grp);
int sysfs_add_link_to_group(struct kobject *kobj, const char *group_name,
struct kobject *target, const char *link_name);
void sysfs_remove_link_from_group(struct kobject *kobj, const char *group_name,
const char *link_name);
void sysfs_notify(struct kobject *kobj, const char *dir, const char *attr);
void sysfs_notify_dirent(struct sysfs_dirent *sd);
@ -326,6 +330,18 @@ static inline void sysfs_unmerge_group(struct kobject *kobj,
{
}
static inline int sysfs_add_link_to_group(struct kobject *kobj,
const char *group_name, struct kobject *target,
const char *link_name)
{
return 0;
}
static inline void sysfs_remove_link_from_group(struct kobject *kobj,
const char *group_name, const char *link_name)
{
}
static inline void sysfs_notify(struct kobject *kobj, const char *dir,
const char *attr)
{