===================================================================
@@ -29,10 +29,14 @@ extern int pci_mmap_fits(struct pci_dev
* platform; to be used during system-wide transitions from a
* sleeping state to the working state and vice versa
*
- * @can_wakeup: returns 'true' if given device is capable of waking up the
- * system from a sleeping state
+ * @can_wakeup: returns 'true' if the plaform can generate wake-up events for
+ * given device.
*
- * @sleep_wake: enables/disables the system wake up capability of given device
+ * @sleep_wake: enables/disables the wake-up capability of given device
+ *
+ * @run_wake: enables/disables the platform to generate run-time wake-up events
+ * for given device (the device's wake-up capability has to be
+ * enabled by @sleep_wake for this feature to work)
*
* If given platform is generally capable of power managing PCI devices, all of
* these callbacks are mandatory.
@@ -43,12 +47,16 @@ struct pci_platform_pm_ops {
pci_power_t (*choose_state)(struct pci_dev *dev);
bool (*can_wakeup)(struct pci_dev *dev);
int (*sleep_wake)(struct pci_dev *dev, bool enable);
+ int (*run_wake)(struct pci_dev *dev, bool enable);
};
extern int pci_set_platform_pm(struct pci_platform_pm_ops *ops);
+extern int pci_platform_run_wake(struct pci_dev *dev, bool enable);
extern void pci_update_current_state(struct pci_dev *dev, pci_power_t state);
extern void pci_disable_enabled_device(struct pci_dev *dev);
extern bool pci_check_pme_status(struct pci_dev *dev);
+extern void pci_pme_wakeup_bus(struct pci_bus *bus);
+extern void pci_pme_wakeup(struct pci_dev *dev);
extern void pci_pm_init(struct pci_dev *dev);
extern void platform_pci_wakeup_init(struct pci_dev *dev);
extern void pci_allocate_cap_save_buffers(struct pci_dev *dev);
===================================================================
@@ -18,6 +18,18 @@
#include <linux/pci-acpi.h>
#include "pci.h"
+void pci_acpi_bus_wakeup(acpi_handle handle, u32 event, void *data)
+{
+ if (event == ACPI_NOTIFY_DEVICE_WAKE)
+ pci_pme_wakeup_bus(to_pci_bus(data));
+}
+
+void pci_acpi_device_wakeup(acpi_handle handle, u32 event, void *data)
+{
+ if (event == ACPI_NOTIFY_DEVICE_WAKE)
+ pci_pme_wakeup(to_pci_dev(data));
+}
+
/*
* _SxD returns the D-state with the highest power
* (lowest D-state number) supported in the S-state "x".
@@ -137,12 +149,42 @@ static int acpi_pci_sleep_wake(struct pc
return 0;
}
+static void acpi_pci_propagate_run_wake(struct pci_bus *bus, bool enable)
+{
+ while (bus->parent) {
+ struct pci_dev *bridge = bus->self;
+
+ if (pcie_pme_enabled(bridge))
+ return;
+ if (!acpi_device_run_wake(&bridge->dev, enable))
+ return;
+ bus = bus->parent;
+ }
+
+ /* We have reached the root bus. */
+ if (bus->bridge)
+ acpi_device_run_wake(bus->bridge, enable);
+}
+
+static int acpi_pci_run_wake(struct pci_dev *dev, bool enable)
+{
+ if (pcie_pme_enabled(dev))
+ return 0;
+
+ if (acpi_pci_can_wakeup(dev))
+ return acpi_device_run_wake(&dev->dev, enable);
+
+ acpi_pci_propagate_run_wake(dev->bus, enable);
+ return 0;
+}
+
static struct pci_platform_pm_ops acpi_pci_platform_pm = {
.is_manageable = acpi_pci_power_manageable,
.set_state = acpi_pci_set_power_state,
.choose_state = acpi_pci_choose_state,
.can_wakeup = acpi_pci_can_wakeup,
.sleep_wake = acpi_pci_sleep_wake,
+ .run_wake = acpi_pci_run_wake,
};
/* ACPI bus type */
===================================================================
@@ -21,6 +21,7 @@
#include <linux/interrupt.h>
#include <asm/dma.h> /* isa_dma_bridge_buggy */
#include <linux/device.h>
+#include <linux/pm_runtime.h>
#include <asm/setup.h>
#include "pci.h"
@@ -428,6 +429,12 @@ static inline int platform_pci_sleep_wak
pci_platform_pm->sleep_wake(dev, enable) : -ENODEV;
}
+int pci_platform_run_wake(struct pci_dev *dev, bool enable)
+{
+ return pci_platform_pm ?
+ pci_platform_pm->run_wake(dev, enable) : -ENODEV;
+}
+
/**
* pci_raw_set_power_state - Use PCI PM registers to set the power state of
* given PCI device
@@ -1195,6 +1202,40 @@ bool pci_check_pme_status(struct pci_dev
return ret;
}
+static int pci_pme_wakeup_cb(struct pci_dev *dev, void *ign)
+{
+ if (pci_check_pme_status(dev))
+ pm_request_resume(&dev->dev);
+ return 0;
+}
+
+/**
+ * pci_pme_wakeup_bus - Walk given bus and wake up devices on it, if necessary.
+ * @bus: Top bus of the subtree to walk.
+ */
+void pci_pme_wakeup_bus(struct pci_bus *bus)
+{
+ pci_walk_bus(bus, pci_pme_wakeup_cb, NULL);
+}
+
+/**
+ * pci_pme_wakeup - Wake up a device and devices under it if it is a bridge.
+ * @dev: Device to handle.
+ *
+ * Check if @dev has generated PME and queue a resume request for it in that
+ * case. If @dev is a bridge, walk the bus under it, check if there are any
+ * devices that generated PME on this bus and queue resume requests for them
+ * (asynchronous resume is used, because we need to clear PME status bits for
+ * all devices before resuming any of them).
+ */
+void pci_pme_wakeup(struct pci_dev *dev)
+{
+ if (pci_check_pme_status(dev))
+ pm_request_resume(&dev->dev);
+ if (dev->subordinate)
+ pci_pme_wakeup_bus(dev->subordinate);
+}
+
/**
* pci_pme_capable - check the capability of PCI device to generate PME#
* @dev: PCI device to handle.
===================================================================
@@ -124,6 +124,53 @@ void acpi_disable_wakeup_device(u8 sleep
}
}
+#ifdef CONFIG_PM_WAKEUP
+/**
+ * acpi_device_run_wake - Enable/disable ACPI BIOS to generate wake-up events.
+ * @phys_dev: Device to generate the wake-up events for.
+ * @enable: Desired action.
+ *
+ * If @enable is set, set up the GPE associated with @phys_dev to generate
+ * wake-up events at run time. If @enable is unset, disable the GPE associated
+ * with @phys_dev (unless it is marked as a run-wake device).
+ */
+int acpi_device_run_wake(struct device *phys_dev, bool enable)
+{
+ struct acpi_device *dev;
+ acpi_handle handle;
+
+ handle = DEVICE_ACPI_HANDLE(phys_dev);
+ if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &dev))) {
+ dev_dbg(phys_dev, "ACPI context not found in %s!\n", __func__);
+ return -ENODEV;
+ }
+
+ if (!dev->wakeup.flags.valid)
+ return -EINVAL;
+
+ if (enable) {
+ if (!dev->wakeup.state.enabled && !dev->wakeup.prepare_count)
+ return -EINVAL;
+
+ acpi_set_gpe_type(dev->wakeup.gpe_device,
+ dev->wakeup.gpe_number,
+ ACPI_GPE_TYPE_WAKE_RUN);
+ acpi_enable_gpe(dev->wakeup.gpe_device,
+ dev->wakeup.gpe_number);
+ } else if (!dev->wakeup.flags.run_wake) {
+ acpi_set_gpe_type(dev->wakeup.gpe_device,
+ dev->wakeup.gpe_number,
+ ACPI_GPE_TYPE_WAKE);
+ acpi_disable_gpe(dev->wakeup.gpe_device,
+ dev->wakeup.gpe_number);
+ acpi_clear_gpe(dev->wakeup.gpe_device,
+ dev->wakeup.gpe_number, ACPI_NOT_ISR);
+ }
+
+ return 0;
+}
+#endif /* CONFIG_PM_WAKEUP */
+
int __init acpi_wakeup_device_init(void)
{
struct list_head *node, *next;
===================================================================
@@ -375,21 +375,28 @@ int acpi_is_root_bridge(acpi_handle);
acpi_handle acpi_get_pci_rootbridge_handle(unsigned int, unsigned int);
#define DEVICE_ACPI_HANDLE(dev) ((acpi_handle)((dev)->archdata.acpi_handle))
-#ifdef CONFIG_PM_SLEEP
+#ifdef CONFIG_PM_WAKEUP
int acpi_pm_device_sleep_state(struct device *, int *);
int acpi_pm_device_sleep_wake(struct device *, bool);
-#else /* !CONFIG_PM_SLEEP */
+int acpi_device_run_wake(struct device *, bool);
+#else /* !CONFIG_PM_WAKEUP */
static inline int acpi_pm_device_sleep_state(struct device *d, int *p)
{
if (p)
*p = ACPI_STATE_D0;
return ACPI_STATE_D3;
}
+
static inline int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
{
return -ENODEV;
}
-#endif /* !CONFIG_PM_SLEEP */
+
+static inline int acpi_device_run_wake(struct device *dev, bool enable)
+{
+ return -ENODEV;
+}
+#endif /* !CONFIG_PM_WAKEUP */
#endif /* CONFIG_ACPI */
===================================================================
@@ -236,3 +236,8 @@ config PM_RUNTIME
and the bus type drivers of the buses the devices are on are
responsible for the actual handling of the autosuspend requests and
wake-up events.
+
+config PM_WAKEUP
+ bool
+ depends on SUSPEND || HIBERNATION || PM_RUNTIME
+ default y
===================================================================
@@ -594,7 +594,7 @@ int acpi_suspend(u32 acpi_state)
return -EINVAL;
}
-#ifdef CONFIG_PM_SLEEP
+#ifdef CONFIG_PM_WAKEUP
/**
* acpi_pm_device_sleep_state - return preferred power state of ACPI device
* in the system sleep state given by %acpi_target_sleep_state
@@ -709,7 +709,7 @@ int acpi_pm_device_sleep_wake(struct dev
return error;
}
-#endif
+#endif /* CONFIG_PM_WAKEUP */
static void acpi_power_off_prepare(void)
{
===================================================================
@@ -576,6 +576,11 @@ static int __devinit acpi_pci_root_add(s
if (flags != base_flags)
acpi_pci_osc_support(root, flags);
+ if (device->wakeup.flags.valid)
+ acpi_install_notify_handler(device->handle, ACPI_SYSTEM_NOTIFY,
+ pci_acpi_bus_wakeup,
+ &root->bus->dev);
+
return 0;
end:
===================================================================
@@ -10,6 +10,9 @@
#include <linux/acpi.h>
+extern void pci_acpi_bus_wakeup(acpi_handle handle, u32 event, void *data);
+extern void pci_acpi_device_wakeup(acpi_handle handle, u32 event, void *data);
+
#ifdef CONFIG_ACPI
static inline acpi_handle acpi_find_root_bridge_handle(struct pci_dev *pdev)
{
===================================================================
@@ -26,6 +26,7 @@
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/pci.h>
+#include <linux/pci-acpi.h>
#include <linux/acpi.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
@@ -94,6 +95,11 @@ static int acpi_pci_bind(struct acpi_dev
acpi_pci_irq_add_prt(device->handle, bus);
+ if (device->wakeup.flags.valid)
+ acpi_install_notify_handler(device->handle, ACPI_SYSTEM_NOTIFY,
+ pci_acpi_device_wakeup,
+ &dev->dev);
+
out:
pci_dev_put(dev);
return 0;