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Merge branch 'power-resource' into release

This commit is contained in:
Len Brown 2011-01-12 04:55:28 -05:00
parent 1ae5ec903f 53eac700b0
commit 07bf280521
8 changed files with 171 additions and 145 deletions
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153
drivers/acpi/bus.c
View File

@ -52,22 +52,6 @@ EXPORT_SYMBOL(acpi_root_dir);
#define STRUCT_TO_INT(s) (*((int*)&s))
static int set_power_nocheck(const struct dmi_system_id *id)
{
printk(KERN_NOTICE PREFIX "%s detected - "
"disable power check in power transition\n", id->ident);
acpi_power_nocheck = 1;
return 0;
}
static struct dmi_system_id __cpuinitdata power_nocheck_dmi_table[] = {
{
set_power_nocheck, "HP Pavilion 05", {
DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
DMI_MATCH(DMI_SYS_VENDOR, "HP Pavilion 05"),
DMI_MATCH(DMI_PRODUCT_VERSION, "2001211RE101GLEND") }, NULL},
{},
};
#ifdef CONFIG_X86
static int set_copy_dsdt(const struct dmi_system_id *id)
@ -196,33 +180,24 @@ EXPORT_SYMBOL(acpi_bus_get_private_data);
Power Management
-------------------------------------------------------------------------- */
int acpi_bus_get_power(acpi_handle handle, int *state)
static int __acpi_bus_get_power(struct acpi_device *device, int *state)
{
int result = 0;
acpi_status status = 0;
struct acpi_device *device = NULL;
unsigned long long psc = 0;
result = acpi_bus_get_device(handle, &device);
if (result)
return result;
if (!device || !state)
return -EINVAL;
*state = ACPI_STATE_UNKNOWN;
if (!device->flags.power_manageable) {
/* TBD: Non-recursive algorithm for walking up hierarchy */
if (device->parent)
*state = device->parent->power.state;
else
*state = ACPI_STATE_D0;
} else {
if (device->flags.power_manageable) {
/*
* Get the device's power state either directly (via _PSC) or
* indirectly (via power resources).
*/
if (device->power.flags.power_resources) {
result = acpi_power_get_inferred_state(device);
result = acpi_power_get_inferred_state(device, state);
if (result)
return result;
} else if (device->power.flags.explicit_get) {
@ -230,59 +205,33 @@ int acpi_bus_get_power(acpi_handle handle, int *state)
NULL, &psc);
if (ACPI_FAILURE(status))
return -ENODEV;
device->power.state = (int)psc;
*state = (int)psc;
}
*state = device->power.state;
} else {
/* TBD: Non-recursive algorithm for walking up hierarchy. */
*state = device->parent ?
device->parent->power.state : ACPI_STATE_D0;
}
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is D%d\n",
device->pnp.bus_id, device->power.state));
device->pnp.bus_id, *state));
return 0;
}
EXPORT_SYMBOL(acpi_bus_get_power);
int acpi_bus_set_power(acpi_handle handle, int state)
static int __acpi_bus_set_power(struct acpi_device *device, int state)
{
int result = 0;
acpi_status status = AE_OK;
struct acpi_device *device = NULL;
char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' };
result = acpi_bus_get_device(handle, &device);
if (result)
return result;
if ((state < ACPI_STATE_D0) || (state > ACPI_STATE_D3))
if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3))
return -EINVAL;
/* Make sure this is a valid target state */
if (!device->flags.power_manageable) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device `[%s]' is not power manageable\n",
kobject_name(&device->dev.kobj)));
return -ENODEV;
}
/*
* Get device's current power state
*/
if (!acpi_power_nocheck) {
/*
* Maybe the incorrect power state is returned on the bogus
* bios, which is different with the real power state.
* For example: the bios returns D0 state and the real power
* state is D3. OS expects to set the device to D0 state. In
* such case if OS uses the power state returned by the BIOS,
* the device can't be transisted to the correct power state.
* So if the acpi_power_nocheck is set, it is unnecessary to
* get the power state by calling acpi_bus_get_power.
*/
acpi_bus_get_power(device->handle, &device->power.state);
}
if ((state == device->power.state) && !device->flags.force_power_state) {
if (state == device->power.state) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n",
state));
return 0;
@ -351,8 +300,75 @@ int acpi_bus_set_power(acpi_handle handle, int state)
return result;
}
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_bus_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_bus_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;
@ -1023,15 +1039,8 @@ static int __init acpi_init(void)
if (acpi_disabled)
return result;
/*
* If the laptop falls into the DMI check table, the power state check
* will be disabled in the course of device power transition.
*/
dmi_check_system(power_nocheck_dmi_table);
acpi_scan_init();
acpi_ec_init();
acpi_power_init();
acpi_debugfs_init();
acpi_sleep_proc_init();
acpi_wakeup_device_init();

27
drivers/acpi/fan.c
View File

@ -86,7 +86,7 @@ static int fan_get_cur_state(struct thermal_cooling_device *cdev, unsigned long
if (!device)
return -EINVAL;
result = acpi_bus_get_power(device->handle, &acpi_state);
result = acpi_bus_update_power(device->handle, &acpi_state);
if (result)
return result;
@ -123,7 +123,6 @@ static struct thermal_cooling_device_ops fan_cooling_ops = {
static int acpi_fan_add(struct acpi_device *device)
{
int result = 0;
int state = 0;
struct thermal_cooling_device *cdev;
if (!device)
@ -132,16 +131,12 @@ static int acpi_fan_add(struct acpi_device *device)
strcpy(acpi_device_name(device), "Fan");
strcpy(acpi_device_class(device), ACPI_FAN_CLASS);
result = acpi_bus_get_power(device->handle, &state);
result = acpi_bus_update_power(device->handle, NULL);
if (result) {
printk(KERN_ERR PREFIX "Reading power state\n");
printk(KERN_ERR PREFIX "Setting initial power state\n");
goto end;
}
device->flags.force_power_state = 1;
acpi_bus_set_power(device->handle, state);
device->flags.force_power_state = 0;
cdev = thermal_cooling_device_register("Fan", device,
&fan_cooling_ops);
if (IS_ERR(cdev)) {
@ -200,22 +195,14 @@ static int acpi_fan_suspend(struct acpi_device *device, pm_message_t state)
static int acpi_fan_resume(struct acpi_device *device)
{
int result = 0;
int power_state = 0;
int result;
if (!device)
return -EINVAL;
result = acpi_bus_get_power(device->handle, &power_state);
if (result) {
printk(KERN_ERR PREFIX
"Error reading fan power state\n");
return result;
}
device->flags.force_power_state = 1;
acpi_bus_set_power(device->handle, power_state);
device->flags.force_power_state = 0;
result = acpi_bus_update_power(device->handle, NULL);
if (result)
printk(KERN_ERR PREFIX "Error updating fan power state\n");
return result;
}

5
drivers/acpi/internal.h
View File

@ -41,9 +41,10 @@ static inline int acpi_debugfs_init(void) { return 0; }
int acpi_power_init(void);
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 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);
extern int acpi_power_nocheck;
int acpi_bus_init_power(struct acpi_device *device);
int acpi_wakeup_device_init(void);
void acpi_early_processor_set_pdc(void);

90
drivers/acpi/power.c
View File

@ -56,9 +56,6 @@ ACPI_MODULE_NAME("power");
#define ACPI_POWER_RESOURCE_STATE_ON 0x01
#define ACPI_POWER_RESOURCE_STATE_UNKNOWN 0xFF
int acpi_power_nocheck;
module_param_named(power_nocheck, acpi_power_nocheck, bool, 000);
static int acpi_power_add(struct acpi_device *device);
static int acpi_power_remove(struct acpi_device *device, int type);
static int acpi_power_resume(struct acpi_device *device);
@ -266,6 +263,35 @@ static int acpi_power_off_device(acpi_handle handle)
return result;
}
static void __acpi_power_off_list(struct acpi_handle_list *list, int num_res)
{
int i;
for (i = num_res - 1; i >= 0 ; i--)
acpi_power_off_device(list->handles[i]);
}
static void acpi_power_off_list(struct acpi_handle_list *list)
{
__acpi_power_off_list(list, list->count);
}
static int acpi_power_on_list(struct acpi_handle_list *list)
{
int result = 0;
int i;
for (i = 0; i < list->count; i++) {
result = acpi_power_on(list->handles[i]);
if (result) {
__acpi_power_off_list(list, i);
break;
}
}
return result;
}
/**
* acpi_device_sleep_wake - execute _DSW (Device Sleep Wake) or (deprecated in
* ACPI 3.0) _PSW (Power State Wake)
@ -423,19 +449,16 @@ int acpi_disable_wakeup_device_power(struct acpi_device *dev)
Device Power Management
-------------------------------------------------------------------------- */
int acpi_power_get_inferred_state(struct acpi_device *device)
int acpi_power_get_inferred_state(struct acpi_device *device, int *state)
{
int result = 0;
struct acpi_handle_list *list = NULL;
int list_state = 0;
int i = 0;
if (!device)
if (!device || !state)
return -EINVAL;
device->power.state = ACPI_STATE_UNKNOWN;
/*
* We know a device's inferred power state when all the resources
* required for a given D-state are 'on'.
@ -450,22 +473,26 @@ int acpi_power_get_inferred_state(struct acpi_device *device)
return result;
if (list_state == ACPI_POWER_RESOURCE_STATE_ON) {
device->power.state = i;
*state = i;
return 0;
}
}
device->power.state = ACPI_STATE_D3;
*state = ACPI_STATE_D3;
return 0;
}
int acpi_power_on_resources(struct acpi_device *device, int state)
{
if (!device || state < ACPI_STATE_D0 || state > ACPI_STATE_D3)
return -EINVAL;
return acpi_power_on_list(&device->power.states[state].resources);
}
int acpi_power_transition(struct acpi_device *device, int state)
{
int result = 0;
struct acpi_handle_list *cl = NULL; /* Current Resources */
struct acpi_handle_list *tl = NULL; /* Target Resources */
int i = 0;
int result;
if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3))
return -EINVAL;
@ -477,37 +504,20 @@ int acpi_power_transition(struct acpi_device *device, int state)
|| (device->power.state > ACPI_STATE_D3))
return -ENODEV;
cl = &device->power.states[device->power.state].resources;
tl = &device->power.states[state].resources;
/* TBD: Resources must be ordered. */
/*
* First we reference all power resources required in the target list
* (e.g. so the device doesn't lose power while transitioning).
* (e.g. so the device doesn't lose power while transitioning). Then,
* we dereference all power resources used in the current list.
*/
for (i = 0; i < tl->count; i++) {
result = acpi_power_on(tl->handles[i]);
if (result)
goto end;
}
result = acpi_power_on_list(&device->power.states[state].resources);
if (!result)
acpi_power_off_list(
&device->power.states[device->power.state].resources);
/*
* Then we dereference all power resources used in the current list.
*/
for (i = 0; i < cl->count; i++) {
result = acpi_power_off_device(cl->handles[i]);
if (result)
goto end;
}
end:
if (result)
device->power.state = ACPI_STATE_UNKNOWN;
else {
/* We shouldn't change the state till all above operations succeed */
device->power.state = state;
}
/* We shouldn't change the state unless the above operations succeed. */
device->power.state = result ? ACPI_STATE_UNKNOWN : state;
return result;
}

27
drivers/acpi/scan.c
View File

@ -847,6 +847,8 @@ static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
return 0;
}
static void acpi_bus_add_power_resource(acpi_handle handle);
static int acpi_bus_get_power_flags(struct acpi_device *device)
{
acpi_status status = 0;
@ -875,8 +877,12 @@ static int acpi_bus_get_power_flags(struct acpi_device *device)
acpi_evaluate_reference(device->handle, object_name, NULL,
&ps->resources);
if (ps->resources.count) {
int j;
device->power.flags.power_resources = 1;
ps->flags.valid = 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 */
@ -901,10 +907,7 @@ static int acpi_bus_get_power_flags(struct acpi_device *device)
device->power.states[ACPI_STATE_D3].flags.valid = 1;
device->power.states[ACPI_STATE_D3].power = 0;
/* TBD: System wake support and resource requirements. */
device->power.state = ACPI_STATE_UNKNOWN;
acpi_bus_get_power(device->handle, &(device->power.state));
acpi_bus_init_power(device);
return 0;
}
@ -1326,6 +1329,20 @@ static int acpi_add_single_object(struct acpi_device **child,
#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_bus_ops ops = {
.acpi_op_add = 1,
.acpi_op_start = 1,
};
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, &ops);
}
static int acpi_bus_type_and_status(acpi_handle handle, int *type,
unsigned long long *sta)
{
@ -1573,6 +1590,8 @@ int __init acpi_scan_init(void)
printk(KERN_ERR PREFIX "Could not register bus type\n");
}
acpi_power_init();
/*
* Enumerate devices in the ACPI namespace.
*/

5
drivers/acpi/thermal.c
View File

@ -1059,8 +1059,9 @@ static int acpi_thermal_resume(struct acpi_device *device)
break;
tz->trips.active[i].flags.enabled = 1;
for (j = 0; j < tz->trips.active[i].devices.count; j++) {
result = acpi_bus_get_power(tz->trips.active[i].devices.
handles[j], &power_state);
result = acpi_bus_update_power(
tz->trips.active[i].devices.handles[j],
&power_state);
if (result || (power_state != ACPI_STATE_D0)) {
tz->trips.active[i].flags.enabled = 0;
break;

4
drivers/platform/x86/fujitsu-laptop.c
View File

@ -689,7 +689,7 @@ static int acpi_fujitsu_add(struct acpi_device *device)
if (error)
goto err_free_input_dev;
result = acpi_bus_get_power(fujitsu->acpi_handle, &state);
result = acpi_bus_update_power(fujitsu->acpi_handle, &state);
if (result) {
printk(KERN_ERR "Error reading power state\n");
goto err_unregister_input_dev;
@ -857,7 +857,7 @@ static int acpi_fujitsu_hotkey_add(struct acpi_device *device)
if (error)
goto err_free_input_dev;
result = acpi_bus_get_power(fujitsu_hotkey->acpi_handle, &state);
result = acpi_bus_update_power(fujitsu_hotkey->acpi_handle, &state);
if (result) {
printk(KERN_ERR "Error reading power state\n");
goto err_unregister_input_dev;

5
include/acpi/acpi_bus.h
View File

@ -149,8 +149,7 @@ struct acpi_device_flags {
u32 power_manageable:1;
u32 performance_manageable:1;
u32 wake_capable:1; /* Wakeup(_PRW) supported? */
u32 force_power_state:1;
u32 reserved:22;
u32 reserved:23;
};
/* File System */
@ -328,8 +327,8 @@ 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);
int acpi_bus_get_power(acpi_handle handle, int *state);
int acpi_bus_set_power(acpi_handle handle, int state);
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);
#ifdef CONFIG_ACPI_PROC_EVENT