| Message ID | 3439310.Qij2blxWr5@vostro.rjw.lan (mailing list archive) |
|---|---|
| State | Accepted, archived |
| Headers | show |
This patch doesn't apply... I'm trying on Linus' master branch, HEAD is v3.7-rc4, and I've merged your pm-qos branch on top of v3.7-rc4. Thanks, Aaron On Mon, Oct 29, 2012 at 10:09:09AM +0100, Rafael J. Wysocki wrote: > From: Rafael J. Wysocki <rafael.j.wysocki@intel.com> > > The ACPI function for choosing device power state is now located > in drivers/acpi/sleep.c, but drivers/acpi/device_pm.c is a more > logical place for it, so move it there. > > However, instead of moving the function entirely, move its core only > under a different name and with a different list of arguments, so > that it is more flexible, and leave a wrapper around it in the > original location. > > Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> > --- > drivers/acpi/device_pm.c | 107 +++++++++++++++++++++++++++++++++++++++++++++++ > drivers/acpi/sleep.c | 88 +------------------------------------- > include/acpi/acpi_bus.h | 15 ++++++ > 3 files changed, 124 insertions(+), 86 deletions(-) > > Index: linux/drivers/acpi/device_pm.c > =================================================================== > --- linux.orig/drivers/acpi/device_pm.c > +++ linux/drivers/acpi/device_pm.c > @@ -23,7 +23,9 @@ > */ > > #include <linux/device.h> > +#include <linux/export.h> > #include <linux/mutex.h> > +#include <linux/pm_qos.h> > > #include <acpi/acpi.h> > #include <acpi/acpi_bus.h> > @@ -89,3 +91,108 @@ acpi_status acpi_remove_pm_notifier(stru > mutex_unlock(&acpi_pm_notifier_lock); > return status; > } > + > +/** > + * acpi_device_power_state - Get preferred power state of ACPI device. > + * @dev: Device whose preferred target power state to return. > + * @adev: ACPI device node corresponding to @dev. > + * @target_state: System state to match the resultant device state. > + * @d_max_in: Deepest low-power state to take into consideration. > + * @d_min_p: Location to store the upper limit of the allowed states range. > + * Return value: Preferred power state of the device on success, -ENODEV > + * (if there's no 'struct acpi_device' for @dev) or -EINVAL on failure > + * > + * Find the lowest power (highest number) ACPI device power state that the > + * device can be in while the system is in the state represented by > + * @target_state. If @d_min_p is set, the highest power (lowest number) device > + * power state that @dev can be in for the given system sleep state is stored > + * at the location pointed to by it. > + * > + * Callers must ensure that @dev and @adev are valid pointers and that @adev > + * actually corresponds to @dev before using this function. > + */ > +int acpi_device_power_state(struct device *dev, struct acpi_device *adev, > + u32 target_state, int d_max_in, int *d_min_p) > +{ > + char acpi_method[] = "_SxD"; > + unsigned long long d_min, d_max; > + bool wakeup = false; > + > + if (d_max_in < ACPI_STATE_D0 || d_max_in > ACPI_STATE_D3) > + return -EINVAL; > + > + if (d_max_in > ACPI_STATE_D3_HOT) { > + enum pm_qos_flags_status stat; > + > + stat = dev_pm_qos_flags(dev, PM_QOS_FLAG_NO_POWER_OFF); > + if (stat == PM_QOS_FLAGS_ALL) > + d_max_in = ACPI_STATE_D3_HOT; > + } > + > + acpi_method[2] = '0' + target_state; > + /* > + * If the sleep state is S0, the lowest limit from ACPI is D3, > + * but if the device has _S0W, we will use the value from _S0W > + * as the lowest limit from ACPI. Finally, we will constrain > + * the lowest limit with the specified one. > + */ > + d_min = ACPI_STATE_D0; > + d_max = ACPI_STATE_D3; > + > + /* > + * If present, _SxD methods return the minimum D-state (highest power > + * state) we can use for the corresponding S-states. Otherwise, the > + * minimum D-state is D0 (ACPI 3.x). > + * > + * NOTE: We rely on acpi_evaluate_integer() not clobbering the integer > + * provided -- that's our fault recovery, we ignore retval. > + */ > + if (target_state > ACPI_STATE_S0) { > + acpi_evaluate_integer(adev->handle, acpi_method, NULL, &d_min); > + wakeup = device_may_wakeup(dev) && adev->wakeup.flags.valid > + && adev->wakeup.sleep_state >= target_state; > + } else if (dev_pm_qos_flags(dev, PM_QOS_FLAG_REMOTE_WAKEUP) != > + PM_QOS_FLAGS_NONE) { > + wakeup = adev->wakeup.flags.valid; > + } > + > + /* > + * If _PRW says we can wake up the system from the target sleep state, > + * the D-state returned by _SxD is sufficient for that (we assume a > + * wakeup-aware driver if wake is set). Still, if _SxW exists > + * (ACPI 3.x), it should return the maximum (lowest power) D-state that > + * can wake the system. _S0W may be valid, too. > + */ > + if (wakeup) { > + acpi_status status; > + > + acpi_method[3] = 'W'; > + status = acpi_evaluate_integer(adev->handle, acpi_method, NULL, > + &d_max); > + if (ACPI_FAILURE(status)) { > + if (target_state != ACPI_STATE_S0 || > + status != AE_NOT_FOUND) > + d_max = d_min; > + } else if (d_max < d_min) { > + /* Warn the user of the broken DSDT */ > + printk(KERN_WARNING "ACPI: Wrong value from %s\n", > + acpi_method); > + /* Sanitize it */ > + d_min = d_max; > + } > + } > + > + if (d_max_in < d_min) > + return -EINVAL; > + if (d_min_p) > + *d_min_p = d_min; > + /* constrain d_max with specified lowest limit (max number) */ > + if (d_max > d_max_in) { > + for (d_max = d_max_in; d_max > d_min; d_max--) { > + if (adev->power.states[d_max].flags.valid) > + break; > + } > + } > + return d_max; > +} > +EXPORT_SYMBOL_GPL(acpi_device_power_state); > Index: linux/drivers/acpi/sleep.c > =================================================================== > --- linux.orig/drivers/acpi/sleep.c > +++ linux/drivers/acpi/sleep.c > @@ -19,7 +19,6 @@ > #include <linux/acpi.h> > #include <linux/module.h> > #include <linux/pm_runtime.h> > -#include <linux/pm_qos.h> > > #include <asm/io.h> > > @@ -706,101 +705,20 @@ int acpi_suspend(u32 acpi_state) > * Return value: Preferred power state of the device on success, -ENODEV > * (if there's no 'struct acpi_device' for @dev) or -EINVAL on failure > * > - * Find the lowest power (highest number) ACPI device power state that the > - * device can be in while the system is in the sleep state represented > - * by %acpi_target_sleep_state. If @d_min_p is set, the highest power (lowest > - * number) device power state that @dev can be in for the given system sleep > - * state is stored at the location pointed to by it. > - * > * The caller must ensure that @dev is valid before using this function. > */ > 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; > - char acpi_method[] = "_SxD"; > - unsigned long long d_min, d_max; > - bool wakeup = false; > > - if (d_max_in < ACPI_STATE_D0 || d_max_in > ACPI_STATE_D3) > - return -EINVAL; > if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) { > - printk(KERN_DEBUG "ACPI handle has no context!\n"); > + dev_dbg(dev, "ACPI handle without context in %s!\n", __func__); > return -ENODEV; > } > - if (d_max_in > ACPI_STATE_D3_HOT) { > - enum pm_qos_flags_status stat; > - > - stat = dev_pm_qos_flags(dev, PM_QOS_FLAG_NO_POWER_OFF); > - if (stat == PM_QOS_FLAGS_ALL) > - d_max_in = ACPI_STATE_D3_HOT; > - } > - > - acpi_method[2] = '0' + acpi_target_sleep_state; > - /* > - * If the sleep state is S0, the lowest limit from ACPI is D3, > - * but if the device has _S0W, we will use the value from _S0W > - * as the lowest limit from ACPI. Finally, we will constrain > - * the lowest limit with the specified one. > - */ > - d_min = ACPI_STATE_D0; > - d_max = ACPI_STATE_D3; > > - /* > - * If present, _SxD methods return the minimum D-state (highest power > - * state) we can use for the corresponding S-states. Otherwise, the > - * minimum D-state is D0 (ACPI 3.x). > - * > - * NOTE: We rely on acpi_evaluate_integer() not clobbering the integer > - * provided -- that's our fault recovery, we ignore retval. > - */ > - if (acpi_target_sleep_state > ACPI_STATE_S0) { > - acpi_evaluate_integer(handle, acpi_method, NULL, &d_min); > - wakeup = device_may_wakeup(dev) && adev->wakeup.flags.valid > - && adev->wakeup.sleep_state >= acpi_target_sleep_state; > - } else if (dev_pm_qos_flags(dev, PM_QOS_FLAG_REMOTE_WAKEUP) != > - PM_QOS_FLAGS_NONE) { > - wakeup = adev->wakeup.flags.valid; > - } > - > - /* > - * If _PRW says we can wake up the system from the target sleep state, > - * the D-state returned by _SxD is sufficient for that (we assume a > - * wakeup-aware driver if wake is set). Still, if _SxW exists > - * (ACPI 3.x), it should return the maximum (lowest power) D-state that > - * can wake the system. _S0W may be valid, too. > - */ > - if (wakeup) { > - acpi_status status; > - > - acpi_method[3] = 'W'; > - status = acpi_evaluate_integer(handle, acpi_method, NULL, > - &d_max); > - if (ACPI_FAILURE(status)) { > - if (acpi_target_sleep_state != ACPI_STATE_S0 || > - status != AE_NOT_FOUND) > - d_max = d_min; > - } else if (d_max < d_min) { > - /* Warn the user of the broken DSDT */ > - printk(KERN_WARNING "ACPI: Wrong value from %s\n", > - acpi_method); > - /* Sanitize it */ > - d_min = d_max; > - } > - } > - > - if (d_max_in < d_min) > - return -EINVAL; > - if (d_min_p) > - *d_min_p = d_min; > - /* constrain d_max with specified lowest limit (max number) */ > - if (d_max > d_max_in) { > - for (d_max = d_max_in; d_max > d_min; d_max--) { > - if (adev->power.states[d_max].flags.valid) > - break; > - } > - } > - return d_max; > + return acpi_device_power_state(dev, adev, acpi_target_sleep_state, > + d_max_in, d_min_p); > } > EXPORT_SYMBOL(acpi_pm_device_sleep_state); > #endif /* CONFIG_PM */ > Index: linux/include/acpi/acpi_bus.h > =================================================================== > --- linux.orig/include/acpi/acpi_bus.h > +++ linux/include/acpi/acpi_bus.h > @@ -419,6 +419,8 @@ acpi_status acpi_add_pm_notifier(struct > acpi_notify_handler handler, void *context); > acpi_status acpi_remove_pm_notifier(struct acpi_device *adev, > acpi_notify_handler handler); > +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); > #else > static inline acpi_status acpi_add_pm_notifier(struct acpi_device *adev, > @@ -432,12 +434,23 @@ static inline acpi_status acpi_remove_pm > { > return AE_SUPPORT; > } > -static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m) > +static inline int __acpi_device_power_state(int m, int *p) > { > if (p) > *p = ACPI_STATE_D0; > return (m >= ACPI_STATE_D0 && m <= ACPI_STATE_D3) ? m : ACPI_STATE_D0; > } > +static inline int acpi_device_power_state(struct device *dev, > + struct acpi_device *adev, > + u32 target_state, int d_max_in, > + int *d_min_p) > +{ > + return __acpi_device_power_state(d_max_in, d_min_p); > +} > +static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m) > +{ > + return __acpi_device_power_state(m, p); > +} > #endif > > #ifdef CONFIG_PM_RUNTIME > -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Tuesday, November 06, 2012 12:56:07 PM Aaron Lu wrote: > This patch doesn't apply... > > I'm trying on Linus' master branch, HEAD is v3.7-rc4, and I've merged > your pm-qos branch on top of v3.7-rc4. Well, it applies for me. You can use the linux-next branch of my tree instead. It may contain some fixes made after this patch had been sent. Thanks, Rafael > On Mon, Oct 29, 2012 at 10:09:09AM +0100, Rafael J. Wysocki wrote: > > From: Rafael J. Wysocki <rafael.j.wysocki@intel.com> > > > > The ACPI function for choosing device power state is now located > > in drivers/acpi/sleep.c, but drivers/acpi/device_pm.c is a more > > logical place for it, so move it there. > > > > However, instead of moving the function entirely, move its core only > > under a different name and with a different list of arguments, so > > that it is more flexible, and leave a wrapper around it in the > > original location. > > > > Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> > > --- > > drivers/acpi/device_pm.c | 107 +++++++++++++++++++++++++++++++++++++++++++++++ > > drivers/acpi/sleep.c | 88 +------------------------------------- > > include/acpi/acpi_bus.h | 15 ++++++ > > 3 files changed, 124 insertions(+), 86 deletions(-) > > > > Index: linux/drivers/acpi/device_pm.c > > =================================================================== > > --- linux.orig/drivers/acpi/device_pm.c > > +++ linux/drivers/acpi/device_pm.c > > @@ -23,7 +23,9 @@ > > */ > > > > #include <linux/device.h> > > +#include <linux/export.h> > > #include <linux/mutex.h> > > +#include <linux/pm_qos.h> > > > > #include <acpi/acpi.h> > > #include <acpi/acpi_bus.h> > > @@ -89,3 +91,108 @@ acpi_status acpi_remove_pm_notifier(stru > > mutex_unlock(&acpi_pm_notifier_lock); > > return status; > > } > > + > > +/** > > + * acpi_device_power_state - Get preferred power state of ACPI device. > > + * @dev: Device whose preferred target power state to return. > > + * @adev: ACPI device node corresponding to @dev. > > + * @target_state: System state to match the resultant device state. > > + * @d_max_in: Deepest low-power state to take into consideration. > > + * @d_min_p: Location to store the upper limit of the allowed states range. > > + * Return value: Preferred power state of the device on success, -ENODEV > > + * (if there's no 'struct acpi_device' for @dev) or -EINVAL on failure > > + * > > + * Find the lowest power (highest number) ACPI device power state that the > > + * device can be in while the system is in the state represented by > > + * @target_state. If @d_min_p is set, the highest power (lowest number) device > > + * power state that @dev can be in for the given system sleep state is stored > > + * at the location pointed to by it. > > + * > > + * Callers must ensure that @dev and @adev are valid pointers and that @adev > > + * actually corresponds to @dev before using this function. > > + */ > > +int acpi_device_power_state(struct device *dev, struct acpi_device *adev, > > + u32 target_state, int d_max_in, int *d_min_p) > > +{ > > + char acpi_method[] = "_SxD"; > > + unsigned long long d_min, d_max; > > + bool wakeup = false; > > + > > + if (d_max_in < ACPI_STATE_D0 || d_max_in > ACPI_STATE_D3) > > + return -EINVAL; > > + > > + if (d_max_in > ACPI_STATE_D3_HOT) { > > + enum pm_qos_flags_status stat; > > + > > + stat = dev_pm_qos_flags(dev, PM_QOS_FLAG_NO_POWER_OFF); > > + if (stat == PM_QOS_FLAGS_ALL) > > + d_max_in = ACPI_STATE_D3_HOT; > > + } > > + > > + acpi_method[2] = '0' + target_state; > > + /* > > + * If the sleep state is S0, the lowest limit from ACPI is D3, > > + * but if the device has _S0W, we will use the value from _S0W > > + * as the lowest limit from ACPI. Finally, we will constrain > > + * the lowest limit with the specified one. > > + */ > > + d_min = ACPI_STATE_D0; > > + d_max = ACPI_STATE_D3; > > + > > + /* > > + * If present, _SxD methods return the minimum D-state (highest power > > + * state) we can use for the corresponding S-states. Otherwise, the > > + * minimum D-state is D0 (ACPI 3.x). > > + * > > + * NOTE: We rely on acpi_evaluate_integer() not clobbering the integer > > + * provided -- that's our fault recovery, we ignore retval. > > + */ > > + if (target_state > ACPI_STATE_S0) { > > + acpi_evaluate_integer(adev->handle, acpi_method, NULL, &d_min); > > + wakeup = device_may_wakeup(dev) && adev->wakeup.flags.valid > > + && adev->wakeup.sleep_state >= target_state; > > + } else if (dev_pm_qos_flags(dev, PM_QOS_FLAG_REMOTE_WAKEUP) != > > + PM_QOS_FLAGS_NONE) { > > + wakeup = adev->wakeup.flags.valid; > > + } > > + > > + /* > > + * If _PRW says we can wake up the system from the target sleep state, > > + * the D-state returned by _SxD is sufficient for that (we assume a > > + * wakeup-aware driver if wake is set). Still, if _SxW exists > > + * (ACPI 3.x), it should return the maximum (lowest power) D-state that > > + * can wake the system. _S0W may be valid, too. > > + */ > > + if (wakeup) { > > + acpi_status status; > > + > > + acpi_method[3] = 'W'; > > + status = acpi_evaluate_integer(adev->handle, acpi_method, NULL, > > + &d_max); > > + if (ACPI_FAILURE(status)) { > > + if (target_state != ACPI_STATE_S0 || > > + status != AE_NOT_FOUND) > > + d_max = d_min; > > + } else if (d_max < d_min) { > > + /* Warn the user of the broken DSDT */ > > + printk(KERN_WARNING "ACPI: Wrong value from %s\n", > > + acpi_method); > > + /* Sanitize it */ > > + d_min = d_max; > > + } > > + } > > + > > + if (d_max_in < d_min) > > + return -EINVAL; > > + if (d_min_p) > > + *d_min_p = d_min; > > + /* constrain d_max with specified lowest limit (max number) */ > > + if (d_max > d_max_in) { > > + for (d_max = d_max_in; d_max > d_min; d_max--) { > > + if (adev->power.states[d_max].flags.valid) > > + break; > > + } > > + } > > + return d_max; > > +} > > +EXPORT_SYMBOL_GPL(acpi_device_power_state); > > Index: linux/drivers/acpi/sleep.c > > =================================================================== > > --- linux.orig/drivers/acpi/sleep.c > > +++ linux/drivers/acpi/sleep.c > > @@ -19,7 +19,6 @@ > > #include <linux/acpi.h> > > #include <linux/module.h> > > #include <linux/pm_runtime.h> > > -#include <linux/pm_qos.h> > > > > #include <asm/io.h> > > > > @@ -706,101 +705,20 @@ int acpi_suspend(u32 acpi_state) > > * Return value: Preferred power state of the device on success, -ENODEV > > * (if there's no 'struct acpi_device' for @dev) or -EINVAL on failure > > * > > - * Find the lowest power (highest number) ACPI device power state that the > > - * device can be in while the system is in the sleep state represented > > - * by %acpi_target_sleep_state. If @d_min_p is set, the highest power (lowest > > - * number) device power state that @dev can be in for the given system sleep > > - * state is stored at the location pointed to by it. > > - * > > * The caller must ensure that @dev is valid before using this function. > > */ > > 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; > > - char acpi_method[] = "_SxD"; > > - unsigned long long d_min, d_max; > > - bool wakeup = false; > > > > - if (d_max_in < ACPI_STATE_D0 || d_max_in > ACPI_STATE_D3) > > - return -EINVAL; > > if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) { > > - printk(KERN_DEBUG "ACPI handle has no context!\n"); > > + dev_dbg(dev, "ACPI handle without context in %s!\n", __func__); > > return -ENODEV; > > } > > - if (d_max_in > ACPI_STATE_D3_HOT) { > > - enum pm_qos_flags_status stat; > > - > > - stat = dev_pm_qos_flags(dev, PM_QOS_FLAG_NO_POWER_OFF); > > - if (stat == PM_QOS_FLAGS_ALL) > > - d_max_in = ACPI_STATE_D3_HOT; > > - } > > - > > - acpi_method[2] = '0' + acpi_target_sleep_state; > > - /* > > - * If the sleep state is S0, the lowest limit from ACPI is D3, > > - * but if the device has _S0W, we will use the value from _S0W > > - * as the lowest limit from ACPI. Finally, we will constrain > > - * the lowest limit with the specified one. > > - */ > > - d_min = ACPI_STATE_D0; > > - d_max = ACPI_STATE_D3; > > > > - /* > > - * If present, _SxD methods return the minimum D-state (highest power > > - * state) we can use for the corresponding S-states. Otherwise, the > > - * minimum D-state is D0 (ACPI 3.x). > > - * > > - * NOTE: We rely on acpi_evaluate_integer() not clobbering the integer > > - * provided -- that's our fault recovery, we ignore retval. > > - */ > > - if (acpi_target_sleep_state > ACPI_STATE_S0) { > > - acpi_evaluate_integer(handle, acpi_method, NULL, &d_min); > > - wakeup = device_may_wakeup(dev) && adev->wakeup.flags.valid > > - && adev->wakeup.sleep_state >= acpi_target_sleep_state; > > - } else if (dev_pm_qos_flags(dev, PM_QOS_FLAG_REMOTE_WAKEUP) != > > - PM_QOS_FLAGS_NONE) { > > - wakeup = adev->wakeup.flags.valid; > > - } > > - > > - /* > > - * If _PRW says we can wake up the system from the target sleep state, > > - * the D-state returned by _SxD is sufficient for that (we assume a > > - * wakeup-aware driver if wake is set). Still, if _SxW exists > > - * (ACPI 3.x), it should return the maximum (lowest power) D-state that > > - * can wake the system. _S0W may be valid, too. > > - */ > > - if (wakeup) { > > - acpi_status status; > > - > > - acpi_method[3] = 'W'; > > - status = acpi_evaluate_integer(handle, acpi_method, NULL, > > - &d_max); > > - if (ACPI_FAILURE(status)) { > > - if (acpi_target_sleep_state != ACPI_STATE_S0 || > > - status != AE_NOT_FOUND) > > - d_max = d_min; > > - } else if (d_max < d_min) { > > - /* Warn the user of the broken DSDT */ > > - printk(KERN_WARNING "ACPI: Wrong value from %s\n", > > - acpi_method); > > - /* Sanitize it */ > > - d_min = d_max; > > - } > > - } > > - > > - if (d_max_in < d_min) > > - return -EINVAL; > > - if (d_min_p) > > - *d_min_p = d_min; > > - /* constrain d_max with specified lowest limit (max number) */ > > - if (d_max > d_max_in) { > > - for (d_max = d_max_in; d_max > d_min; d_max--) { > > - if (adev->power.states[d_max].flags.valid) > > - break; > > - } > > - } > > - return d_max; > > + return acpi_device_power_state(dev, adev, acpi_target_sleep_state, > > + d_max_in, d_min_p); > > } > > EXPORT_SYMBOL(acpi_pm_device_sleep_state); > > #endif /* CONFIG_PM */ > > Index: linux/include/acpi/acpi_bus.h > > =================================================================== > > --- linux.orig/include/acpi/acpi_bus.h > > +++ linux/include/acpi/acpi_bus.h > > @@ -419,6 +419,8 @@ acpi_status acpi_add_pm_notifier(struct > > acpi_notify_handler handler, void *context); > > acpi_status acpi_remove_pm_notifier(struct acpi_device *adev, > > acpi_notify_handler handler); > > +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); > > #else > > static inline acpi_status acpi_add_pm_notifier(struct acpi_device *adev, > > @@ -432,12 +434,23 @@ static inline acpi_status acpi_remove_pm > > { > > return AE_SUPPORT; > > } > > -static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m) > > +static inline int __acpi_device_power_state(int m, int *p) > > { > > if (p) > > *p = ACPI_STATE_D0; > > return (m >= ACPI_STATE_D0 && m <= ACPI_STATE_D3) ? m : ACPI_STATE_D0; > > } > > +static inline int acpi_device_power_state(struct device *dev, > > + struct acpi_device *adev, > > + u32 target_state, int d_max_in, > > + int *d_min_p) > > +{ > > + return __acpi_device_power_state(d_max_in, d_min_p); > > +} > > +static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m) > > +{ > > + return __acpi_device_power_state(m, p); > > +} > > #endif > > > > #ifdef CONFIG_PM_RUNTIME > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-pm" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >
Index: linux/drivers/acpi/device_pm.c =================================================================== --- linux.orig/drivers/acpi/device_pm.c +++ linux/drivers/acpi/device_pm.c @@ -23,7 +23,9 @@ */ #include <linux/device.h> +#include <linux/export.h> #include <linux/mutex.h> +#include <linux/pm_qos.h> #include <acpi/acpi.h> #include <acpi/acpi_bus.h> @@ -89,3 +91,108 @@ acpi_status acpi_remove_pm_notifier(stru mutex_unlock(&acpi_pm_notifier_lock); return status; } + +/** + * acpi_device_power_state - Get preferred power state of ACPI device. + * @dev: Device whose preferred target power state to return. + * @adev: ACPI device node corresponding to @dev. + * @target_state: System state to match the resultant device state. + * @d_max_in: Deepest low-power state to take into consideration. + * @d_min_p: Location to store the upper limit of the allowed states range. + * Return value: Preferred power state of the device on success, -ENODEV + * (if there's no 'struct acpi_device' for @dev) or -EINVAL on failure + * + * Find the lowest power (highest number) ACPI device power state that the + * device can be in while the system is in the state represented by + * @target_state. If @d_min_p is set, the highest power (lowest number) device + * power state that @dev can be in for the given system sleep state is stored + * at the location pointed to by it. + * + * Callers must ensure that @dev and @adev are valid pointers and that @adev + * actually corresponds to @dev before using this function. + */ +int acpi_device_power_state(struct device *dev, struct acpi_device *adev, + u32 target_state, int d_max_in, int *d_min_p) +{ + char acpi_method[] = "_SxD"; + unsigned long long d_min, d_max; + bool wakeup = false; + + if (d_max_in < ACPI_STATE_D0 || d_max_in > ACPI_STATE_D3) + return -EINVAL; + + if (d_max_in > ACPI_STATE_D3_HOT) { + enum pm_qos_flags_status stat; + + stat = dev_pm_qos_flags(dev, PM_QOS_FLAG_NO_POWER_OFF); + if (stat == PM_QOS_FLAGS_ALL) + d_max_in = ACPI_STATE_D3_HOT; + } + + acpi_method[2] = '0' + target_state; + /* + * If the sleep state is S0, the lowest limit from ACPI is D3, + * but if the device has _S0W, we will use the value from _S0W + * as the lowest limit from ACPI. Finally, we will constrain + * the lowest limit with the specified one. + */ + d_min = ACPI_STATE_D0; + d_max = ACPI_STATE_D3; + + /* + * If present, _SxD methods return the minimum D-state (highest power + * state) we can use for the corresponding S-states. Otherwise, the + * minimum D-state is D0 (ACPI 3.x). + * + * NOTE: We rely on acpi_evaluate_integer() not clobbering the integer + * provided -- that's our fault recovery, we ignore retval. + */ + if (target_state > ACPI_STATE_S0) { + acpi_evaluate_integer(adev->handle, acpi_method, NULL, &d_min); + wakeup = device_may_wakeup(dev) && adev->wakeup.flags.valid + && adev->wakeup.sleep_state >= target_state; + } else if (dev_pm_qos_flags(dev, PM_QOS_FLAG_REMOTE_WAKEUP) != + PM_QOS_FLAGS_NONE) { + wakeup = adev->wakeup.flags.valid; + } + + /* + * If _PRW says we can wake up the system from the target sleep state, + * the D-state returned by _SxD is sufficient for that (we assume a + * wakeup-aware driver if wake is set). Still, if _SxW exists + * (ACPI 3.x), it should return the maximum (lowest power) D-state that + * can wake the system. _S0W may be valid, too. + */ + if (wakeup) { + acpi_status status; + + acpi_method[3] = 'W'; + status = acpi_evaluate_integer(adev->handle, acpi_method, NULL, + &d_max); + if (ACPI_FAILURE(status)) { + if (target_state != ACPI_STATE_S0 || + status != AE_NOT_FOUND) + d_max = d_min; + } else if (d_max < d_min) { + /* Warn the user of the broken DSDT */ + printk(KERN_WARNING "ACPI: Wrong value from %s\n", + acpi_method); + /* Sanitize it */ + d_min = d_max; + } + } + + if (d_max_in < d_min) + return -EINVAL; + if (d_min_p) + *d_min_p = d_min; + /* constrain d_max with specified lowest limit (max number) */ + if (d_max > d_max_in) { + for (d_max = d_max_in; d_max > d_min; d_max--) { + if (adev->power.states[d_max].flags.valid) + break; + } + } + return d_max; +} +EXPORT_SYMBOL_GPL(acpi_device_power_state); Index: linux/drivers/acpi/sleep.c =================================================================== --- linux.orig/drivers/acpi/sleep.c +++ linux/drivers/acpi/sleep.c @@ -19,7 +19,6 @@ #include <linux/acpi.h> #include <linux/module.h> #include <linux/pm_runtime.h> -#include <linux/pm_qos.h> #include <asm/io.h> @@ -706,101 +705,20 @@ int acpi_suspend(u32 acpi_state) * Return value: Preferred power state of the device on success, -ENODEV * (if there's no 'struct acpi_device' for @dev) or -EINVAL on failure * - * Find the lowest power (highest number) ACPI device power state that the - * device can be in while the system is in the sleep state represented - * by %acpi_target_sleep_state. If @d_min_p is set, the highest power (lowest - * number) device power state that @dev can be in for the given system sleep - * state is stored at the location pointed to by it. - * * The caller must ensure that @dev is valid before using this function. */ 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; - char acpi_method[] = "_SxD"; - unsigned long long d_min, d_max; - bool wakeup = false; - if (d_max_in < ACPI_STATE_D0 || d_max_in > ACPI_STATE_D3) - return -EINVAL; if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) { - printk(KERN_DEBUG "ACPI handle has no context!\n"); + dev_dbg(dev, "ACPI handle without context in %s!\n", __func__); return -ENODEV; } - if (d_max_in > ACPI_STATE_D3_HOT) { - enum pm_qos_flags_status stat; - - stat = dev_pm_qos_flags(dev, PM_QOS_FLAG_NO_POWER_OFF); - if (stat == PM_QOS_FLAGS_ALL) - d_max_in = ACPI_STATE_D3_HOT; - } - - acpi_method[2] = '0' + acpi_target_sleep_state; - /* - * If the sleep state is S0, the lowest limit from ACPI is D3, - * but if the device has _S0W, we will use the value from _S0W - * as the lowest limit from ACPI. Finally, we will constrain - * the lowest limit with the specified one. - */ - d_min = ACPI_STATE_D0; - d_max = ACPI_STATE_D3; - /* - * If present, _SxD methods return the minimum D-state (highest power - * state) we can use for the corresponding S-states. Otherwise, the - * minimum D-state is D0 (ACPI 3.x). - * - * NOTE: We rely on acpi_evaluate_integer() not clobbering the integer - * provided -- that's our fault recovery, we ignore retval. - */ - if (acpi_target_sleep_state > ACPI_STATE_S0) { - acpi_evaluate_integer(handle, acpi_method, NULL, &d_min); - wakeup = device_may_wakeup(dev) && adev->wakeup.flags.valid - && adev->wakeup.sleep_state >= acpi_target_sleep_state; - } else if (dev_pm_qos_flags(dev, PM_QOS_FLAG_REMOTE_WAKEUP) != - PM_QOS_FLAGS_NONE) { - wakeup = adev->wakeup.flags.valid; - } - - /* - * If _PRW says we can wake up the system from the target sleep state, - * the D-state returned by _SxD is sufficient for that (we assume a - * wakeup-aware driver if wake is set). Still, if _SxW exists - * (ACPI 3.x), it should return the maximum (lowest power) D-state that - * can wake the system. _S0W may be valid, too. - */ - if (wakeup) { - acpi_status status; - - acpi_method[3] = 'W'; - status = acpi_evaluate_integer(handle, acpi_method, NULL, - &d_max); - if (ACPI_FAILURE(status)) { - if (acpi_target_sleep_state != ACPI_STATE_S0 || - status != AE_NOT_FOUND) - d_max = d_min; - } else if (d_max < d_min) { - /* Warn the user of the broken DSDT */ - printk(KERN_WARNING "ACPI: Wrong value from %s\n", - acpi_method); - /* Sanitize it */ - d_min = d_max; - } - } - - if (d_max_in < d_min) - return -EINVAL; - if (d_min_p) - *d_min_p = d_min; - /* constrain d_max with specified lowest limit (max number) */ - if (d_max > d_max_in) { - for (d_max = d_max_in; d_max > d_min; d_max--) { - if (adev->power.states[d_max].flags.valid) - break; - } - } - return d_max; + return acpi_device_power_state(dev, adev, acpi_target_sleep_state, + d_max_in, d_min_p); } EXPORT_SYMBOL(acpi_pm_device_sleep_state); #endif /* CONFIG_PM */ Index: linux/include/acpi/acpi_bus.h =================================================================== --- linux.orig/include/acpi/acpi_bus.h +++ linux/include/acpi/acpi_bus.h @@ -419,6 +419,8 @@ acpi_status acpi_add_pm_notifier(struct acpi_notify_handler handler, void *context); acpi_status acpi_remove_pm_notifier(struct acpi_device *adev, acpi_notify_handler handler); +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); #else static inline acpi_status acpi_add_pm_notifier(struct acpi_device *adev, @@ -432,12 +434,23 @@ static inline acpi_status acpi_remove_pm { return AE_SUPPORT; } -static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m) +static inline int __acpi_device_power_state(int m, int *p) { if (p) *p = ACPI_STATE_D0; return (m >= ACPI_STATE_D0 && m <= ACPI_STATE_D3) ? m : ACPI_STATE_D0; } +static inline int acpi_device_power_state(struct device *dev, + struct acpi_device *adev, + u32 target_state, int d_max_in, + int *d_min_p) +{ + return __acpi_device_power_state(d_max_in, d_min_p); +} +static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m) +{ + return __acpi_device_power_state(m, p); +} #endif #ifdef CONFIG_PM_RUNTIME