PM / Domains: Run late/early device suspend callbacks at the right time
After the introduction of the late/early phases of device suspend/resume during system-wide power transitions it is possible to make the generic PM domains code execute its default late/early device suspend/resume callbacks during those phases instead of the corresponding _noirq phases. The _noirq device suspend/resume phases were only used for executing those callbacks, because this was the only way it could be done, but now we can do better. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
This commit is contained in:
Rafael J. Wysocki
parent
e470d06655
commit
0496c8ae36
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@ -820,17 +820,16 @@ static int pm_genpd_suspend(struct device *dev)
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}
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/**
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* pm_genpd_suspend_noirq - Late suspend of a device from an I/O PM domain.
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* pm_genpd_suspend_late - Late suspend of a device from an I/O PM domain.
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* @dev: Device to suspend.
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*
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* Carry out a late suspend of a device under the assumption that its
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* pm_domain field points to the domain member of an object of type
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* struct generic_pm_domain representing a PM domain consisting of I/O devices.
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*/
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static int pm_genpd_suspend_noirq(struct device *dev)
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static int pm_genpd_suspend_late(struct device *dev)
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{
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struct generic_pm_domain *genpd;
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int ret;
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dev_dbg(dev, "%s()\n", __func__);
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@ -838,14 +837,28 @@ static int pm_genpd_suspend_noirq(struct device *dev)
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if (IS_ERR(genpd))
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return -EINVAL;
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if (genpd->suspend_power_off)
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return 0;
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return genpd->suspend_power_off ? 0 : genpd_suspend_late(genpd, dev);
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}
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ret = genpd_suspend_late(genpd, dev);
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if (ret)
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return ret;
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/**
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* pm_genpd_suspend_noirq - Completion of suspend of device in an I/O PM domain.
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* @dev: Device to suspend.
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*
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* Stop the device and remove power from the domain if all devices in it have
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* been stopped.
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*/
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static int pm_genpd_suspend_noirq(struct device *dev)
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{
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struct generic_pm_domain *genpd;
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if (dev->power.wakeup_path && genpd_dev_active_wakeup(genpd, dev))
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dev_dbg(dev, "%s()\n", __func__);
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genpd = dev_to_genpd(dev);
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if (IS_ERR(genpd))
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return -EINVAL;
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if (genpd->suspend_power_off
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|| (dev->power.wakeup_path && genpd_dev_active_wakeup(genpd, dev)))
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return 0;
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genpd_stop_dev(genpd, dev);
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@ -862,13 +875,10 @@ static int pm_genpd_suspend_noirq(struct device *dev)
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}
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/**
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* pm_genpd_resume_noirq - Early resume of a device from an I/O power domain.
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* pm_genpd_resume_noirq - Start of resume of device in an I/O PM domain.
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* @dev: Device to resume.
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*
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* Carry out an early resume of a device under the assumption that its
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* pm_domain field points to the domain member of an object of type
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* struct generic_pm_domain representing a power domain consisting of I/O
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* devices.
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* Restore power to the device's PM domain, if necessary, and start the device.
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*/
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static int pm_genpd_resume_noirq(struct device *dev)
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{
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@ -890,13 +900,34 @@ static int pm_genpd_resume_noirq(struct device *dev)
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*/
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pm_genpd_poweron(genpd);
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genpd->suspended_count--;
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genpd_start_dev(genpd, dev);
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return genpd_resume_early(genpd, dev);
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return genpd_start_dev(genpd, dev);
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}
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/**
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* pm_genpd_resume - Resume a device belonging to an I/O power domain.
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* pm_genpd_resume_early - Early resume of a device in an I/O PM domain.
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* @dev: Device to resume.
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*
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* Carry out an early resume of a device under the assumption that its
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* pm_domain field points to the domain member of an object of type
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* struct generic_pm_domain representing a power domain consisting of I/O
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* devices.
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*/
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static int pm_genpd_resume_early(struct device *dev)
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{
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struct generic_pm_domain *genpd;
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dev_dbg(dev, "%s()\n", __func__);
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genpd = dev_to_genpd(dev);
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if (IS_ERR(genpd))
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return -EINVAL;
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return genpd->suspend_power_off ? 0 : genpd_resume_early(genpd, dev);
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}
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/**
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* pm_genpd_resume - Resume of device in an I/O PM domain.
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* @dev: Device to resume.
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*
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* Resume a device under the assumption that its pm_domain field points to the
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@ -917,7 +948,7 @@ static int pm_genpd_resume(struct device *dev)
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}
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/**
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* pm_genpd_freeze - Freeze a device belonging to an I/O power domain.
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* pm_genpd_freeze - Freezing a device in an I/O PM domain.
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* @dev: Device to freeze.
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*
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* Freeze a device under the assumption that its pm_domain field points to the
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@ -938,7 +969,29 @@ static int pm_genpd_freeze(struct device *dev)
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}
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/**
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* pm_genpd_freeze_noirq - Late freeze of a device from an I/O power domain.
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* pm_genpd_freeze_late - Late freeze of a device in an I/O PM domain.
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* @dev: Device to freeze.
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*
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* Carry out a late freeze of a device under the assumption that its
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* pm_domain field points to the domain member of an object of type
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* struct generic_pm_domain representing a power domain consisting of I/O
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* devices.
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*/
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static int pm_genpd_freeze_late(struct device *dev)
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{
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struct generic_pm_domain *genpd;
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dev_dbg(dev, "%s()\n", __func__);
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genpd = dev_to_genpd(dev);
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if (IS_ERR(genpd))
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return -EINVAL;
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return genpd->suspend_power_off ? 0 : genpd_freeze_late(genpd, dev);
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}
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/**
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* pm_genpd_freeze_noirq - Completion of freezing a device in an I/O PM domain.
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* @dev: Device to freeze.
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*
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* Carry out a late freeze of a device under the assumption that its
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@ -949,7 +1002,6 @@ static int pm_genpd_freeze(struct device *dev)
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static int pm_genpd_freeze_noirq(struct device *dev)
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{
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struct generic_pm_domain *genpd;
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int ret;
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dev_dbg(dev, "%s()\n", __func__);
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@ -957,26 +1009,15 @@ static int pm_genpd_freeze_noirq(struct device *dev)
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if (IS_ERR(genpd))
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return -EINVAL;
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if (genpd->suspend_power_off)
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return 0;
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ret = genpd_freeze_late(genpd, dev);
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if (ret)
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return ret;
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genpd_stop_dev(genpd, dev);
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return 0;
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return genpd->suspend_power_off ? 0 : genpd_stop_dev(genpd, dev);
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}
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/**
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* pm_genpd_thaw_noirq - Early thaw of a device from an I/O power domain.
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* pm_genpd_thaw_noirq - Early thaw of device in an I/O PM domain.
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* @dev: Device to thaw.
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*
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* Carry out an early thaw of a device under the assumption that its
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* pm_domain field points to the domain member of an object of type
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* struct generic_pm_domain representing a power domain consisting of I/O
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* devices.
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* Start the device, unless power has been removed from the domain already
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* before the system transition.
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*/
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static int pm_genpd_thaw_noirq(struct device *dev)
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{
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@ -988,12 +1029,29 @@ static int pm_genpd_thaw_noirq(struct device *dev)
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if (IS_ERR(genpd))
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return -EINVAL;
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if (genpd->suspend_power_off)
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return 0;
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return genpd->suspend_power_off ? 0 : genpd_start_dev(genpd, dev);
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}
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genpd_start_dev(genpd, dev);
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/**
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* pm_genpd_thaw_early - Early thaw of device in an I/O PM domain.
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* @dev: Device to thaw.
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*
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* Carry out an early thaw of a device under the assumption that its
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* pm_domain field points to the domain member of an object of type
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* struct generic_pm_domain representing a power domain consisting of I/O
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* devices.
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*/
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static int pm_genpd_thaw_early(struct device *dev)
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{
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struct generic_pm_domain *genpd;
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return genpd_thaw_early(genpd, dev);
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dev_dbg(dev, "%s()\n", __func__);
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genpd = dev_to_genpd(dev);
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if (IS_ERR(genpd))
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return -EINVAL;
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return genpd->suspend_power_off ? 0 : genpd_thaw_early(genpd, dev);
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}
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/**
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@ -1018,13 +1076,11 @@ static int pm_genpd_thaw(struct device *dev)
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}
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/**
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* pm_genpd_restore_noirq - Early restore of a device from an I/O power domain.
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* pm_genpd_restore_noirq - Start of restore of device in an I/O PM domain.
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* @dev: Device to resume.
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*
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* Carry out an early restore of a device under the assumption that its
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* pm_domain field points to the domain member of an object of type
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* struct generic_pm_domain representing a power domain consisting of I/O
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* devices.
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* Make sure the domain will be in the same power state as before the
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* hibernation the system is resuming from and start the device if necessary.
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*/
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static int pm_genpd_restore_noirq(struct device *dev)
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{
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@ -1054,9 +1110,8 @@ static int pm_genpd_restore_noirq(struct device *dev)
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pm_genpd_poweron(genpd);
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genpd->suspended_count--;
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genpd_start_dev(genpd, dev);
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return genpd_resume_early(genpd, dev);
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return genpd_start_dev(genpd, dev);
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}
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/**
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@ -1099,11 +1154,15 @@ static void pm_genpd_complete(struct device *dev)
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#define pm_genpd_prepare NULL
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#define pm_genpd_suspend NULL
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#define pm_genpd_suspend_late NULL
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#define pm_genpd_suspend_noirq NULL
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#define pm_genpd_resume_early NULL
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#define pm_genpd_resume_noirq NULL
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#define pm_genpd_resume NULL
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#define pm_genpd_freeze NULL
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#define pm_genpd_freeze_late NULL
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#define pm_genpd_freeze_noirq NULL
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#define pm_genpd_thaw_early NULL
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#define pm_genpd_thaw_noirq NULL
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#define pm_genpd_thaw NULL
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#define pm_genpd_restore_noirq NULL
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@ -1450,7 +1509,7 @@ static int pm_genpd_default_suspend_late(struct device *dev)
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{
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int (*cb)(struct device *__dev) = dev_gpd_data(dev)->ops.suspend_late;
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return cb ? cb(dev) : pm_generic_suspend_noirq(dev);
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return cb ? cb(dev) : pm_generic_suspend_late(dev);
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}
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/**
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@ -1461,7 +1520,7 @@ static int pm_genpd_default_resume_early(struct device *dev)
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{
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int (*cb)(struct device *__dev) = dev_gpd_data(dev)->ops.resume_early;
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return cb ? cb(dev) : pm_generic_resume_noirq(dev);
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return cb ? cb(dev) : pm_generic_resume_early(dev);
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}
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/**
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@ -1494,7 +1553,7 @@ static int pm_genpd_default_freeze_late(struct device *dev)
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{
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int (*cb)(struct device *__dev) = dev_gpd_data(dev)->ops.freeze_late;
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return cb ? cb(dev) : pm_generic_freeze_noirq(dev);
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return cb ? cb(dev) : pm_generic_freeze_late(dev);
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}
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/**
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@ -1505,7 +1564,7 @@ static int pm_genpd_default_thaw_early(struct device *dev)
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{
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int (*cb)(struct device *__dev) = dev_gpd_data(dev)->ops.thaw_early;
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return cb ? cb(dev) : pm_generic_thaw_noirq(dev);
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return cb ? cb(dev) : pm_generic_thaw_early(dev);
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}
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/**
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@ -1564,16 +1623,22 @@ void pm_genpd_init(struct generic_pm_domain *genpd,
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genpd->domain.ops.runtime_idle = pm_generic_runtime_idle;
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genpd->domain.ops.prepare = pm_genpd_prepare;
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genpd->domain.ops.suspend = pm_genpd_suspend;
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genpd->domain.ops.suspend_late = pm_genpd_suspend_late;
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genpd->domain.ops.suspend_noirq = pm_genpd_suspend_noirq;
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genpd->domain.ops.resume_noirq = pm_genpd_resume_noirq;
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genpd->domain.ops.resume_early = pm_genpd_resume_early;
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genpd->domain.ops.resume = pm_genpd_resume;
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genpd->domain.ops.freeze = pm_genpd_freeze;
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genpd->domain.ops.freeze_late = pm_genpd_freeze_late;
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genpd->domain.ops.freeze_noirq = pm_genpd_freeze_noirq;
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genpd->domain.ops.thaw_noirq = pm_genpd_thaw_noirq;
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genpd->domain.ops.thaw_early = pm_genpd_thaw_early;
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genpd->domain.ops.thaw = pm_genpd_thaw;
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genpd->domain.ops.poweroff = pm_genpd_suspend;
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genpd->domain.ops.poweroff_late = pm_genpd_suspend_late;
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genpd->domain.ops.poweroff_noirq = pm_genpd_suspend_noirq;
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genpd->domain.ops.restore_noirq = pm_genpd_restore_noirq;
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genpd->domain.ops.restore_early = pm_genpd_resume_early;
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genpd->domain.ops.restore = pm_genpd_resume;
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genpd->domain.ops.complete = pm_genpd_complete;
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genpd->dev_ops.save_state = pm_genpd_default_save_state;
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