diff options
| -rw-r--r-- | drivers/acpi/sleep.c | 2 | ||||
| -rw-r--r-- | drivers/ata/libata-acpi.c | 78 | ||||
| -rw-r--r-- | drivers/ata/libata-scsi.c | 3 | ||||
| -rw-r--r-- | drivers/ata/libata.h | 4 |
4 files changed, 83 insertions, 4 deletions
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c index 88561029cca..1784cb30e7c 100644 --- a/drivers/acpi/sleep.c +++ b/drivers/acpi/sleep.c @@ -795,6 +795,7 @@ int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p) *d_min_p = d_min; return d_max; } +EXPORT_SYMBOL(acpi_pm_device_sleep_state); #endif /* CONFIG_PM */ #ifdef CONFIG_PM_SLEEP @@ -831,6 +832,7 @@ int acpi_pm_device_run_wake(struct device *phys_dev, bool enable) return 0; } +EXPORT_SYMBOL(acpi_pm_device_run_wake); /** * acpi_pm_device_sleep_wake - enable or disable the system wake-up diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c index bb20fd597eb..e01807a1ef3 100644 --- a/drivers/ata/libata-acpi.c +++ b/drivers/ata/libata-acpi.c @@ -16,6 +16,7 @@ #include <linux/libata.h> #include <linux/pci.h> #include <linux/slab.h> +#include <linux/pm_runtime.h> #include <scsi/scsi_device.h> #include "libata.h" @@ -853,6 +854,7 @@ void ata_acpi_set_state(struct ata_port *ap, pm_message_t state) { struct ata_device *dev; acpi_handle handle; + int acpi_state; /* channel first and then drives for power on and vica versa for power off */ @@ -862,10 +864,23 @@ void ata_acpi_set_state(struct ata_port *ap, pm_message_t state) ata_for_each_dev(dev, &ap->link, ENABLED) { handle = ata_dev_acpi_handle(dev); - if (handle) - acpi_bus_set_power(handle, - state.event == PM_EVENT_ON ? - ACPI_STATE_D0 : ACPI_STATE_D3); + if (!handle) + continue; + + if (state.event != PM_EVENT_ON) { + acpi_state = acpi_pm_device_sleep_state( + &dev->sdev->sdev_gendev, NULL); + if (acpi_state > 0) + acpi_bus_set_power(handle, acpi_state); + /* TBD: need to check if it's runtime pm request */ + acpi_pm_device_run_wake( + &dev->sdev->sdev_gendev, true); + } else { + /* Ditto */ + acpi_pm_device_run_wake( + &dev->sdev->sdev_gendev, false); + acpi_bus_set_power(handle, ACPI_STATE_D0); + } } handle = ata_ap_acpi_handle(ap); @@ -965,6 +980,61 @@ void ata_acpi_on_disable(struct ata_device *dev) ata_acpi_clear_gtf(dev); } +static void ata_acpi_wake_dev(acpi_handle handle, u32 event, void *context) +{ + struct ata_device *ata_dev = context; + + if (event == ACPI_NOTIFY_DEVICE_WAKE && ata_dev && + pm_runtime_suspended(&ata_dev->sdev->sdev_gendev)) + scsi_autopm_get_device(ata_dev->sdev); +} + +static void ata_acpi_add_pm_notifier(struct ata_device *dev) +{ + struct acpi_device *acpi_dev; + acpi_handle handle; + acpi_status status; + + handle = ata_dev_acpi_handle(dev); + if (!handle) + return; + + status = acpi_bus_get_device(handle, &acpi_dev); + if (ACPI_SUCCESS(status)) { + acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, + ata_acpi_wake_dev, dev); + device_set_run_wake(&dev->sdev->sdev_gendev, true); + } +} + +static void ata_acpi_remove_pm_notifier(struct ata_device *dev) +{ + struct acpi_device *acpi_dev; + acpi_handle handle; + acpi_status status; + + handle = ata_dev_acpi_handle(dev); + if (!handle) + return; + + status = acpi_bus_get_device(handle, &acpi_dev); + if (ACPI_SUCCESS(status)) { + device_set_run_wake(&dev->sdev->sdev_gendev, false); + acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY, + ata_acpi_wake_dev); + } +} + +void ata_acpi_bind(struct ata_device *dev) +{ + ata_acpi_add_pm_notifier(dev); +} + +void ata_acpi_unbind(struct ata_device *dev) +{ + ata_acpi_remove_pm_notifier(dev); +} + static int compat_pci_ata(struct ata_port *ap) { struct device *dev = ap->tdev.parent; diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 22226350cd0..8ec81ca8f65 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -3445,6 +3445,7 @@ void ata_scsi_scan_host(struct ata_port *ap, int sync) if (!IS_ERR(sdev)) { dev->sdev = sdev; scsi_device_put(sdev); + ata_acpi_bind(dev); } else { dev->sdev = NULL; } @@ -3541,6 +3542,8 @@ static void ata_scsi_remove_dev(struct ata_device *dev) mutex_lock(&ap->scsi_host->scan_mutex); spin_lock_irqsave(ap->lock, flags); + ata_acpi_unbind(dev); + /* clearing dev->sdev is protected by host lock */ sdev = dev->sdev; dev->sdev = NULL; diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h index b0d5294982e..44a7939b5bb 100644 --- a/drivers/ata/libata.h +++ b/drivers/ata/libata.h @@ -120,6 +120,8 @@ extern void ata_acpi_on_disable(struct ata_device *dev); extern void ata_acpi_set_state(struct ata_port *ap, pm_message_t state); extern int ata_acpi_register(void); extern void ata_acpi_unregister(void); +extern void ata_acpi_bind(struct ata_device *dev); +extern void ata_acpi_unbind(struct ata_device *dev); #else static inline void ata_acpi_dissociate(struct ata_host *host) { } static inline int ata_acpi_on_suspend(struct ata_port *ap) { return 0; } @@ -130,6 +132,8 @@ static inline void ata_acpi_set_state(struct ata_port *ap, pm_message_t state) { } static inline int ata_acpi_register(void) { return 0; } static void ata_acpi_unregister(void) { } +static void ata_acpi_bind(struct ata_device *dev) { } +static void ata_acpi_unbind(struct ata_device *dev) { } #endif /* libata-scsi.c */ |