Merge branch 'd3' into release
Len Brown [Fri, 30 Mar 2012 20:21:26 +0000 (16:21 -0400)]
Conflicts:
drivers/acpi/sleep.c

This was a text conflict between
a2ef5c4fd44ce3922435139393b89f2cce47f576
(ACPI: Move module parameter gts and bfs to sleep.c)

which added #include <linux/module.h>

and

b24e5098853653554baf6ec975b9e855f3d6e5c0
(ACPI, PCI: Move acpi_dev_run_wake() to ACPI core)

which added #include <linux/pm_runtime.h>

The resolution was to take them both.

Signed-off-by: Len Brown <len.brown@intel.com>

drivers/acpi/power.c
drivers/acpi/scan.c
drivers/acpi/sleep.c
drivers/pci/pci-acpi.c
include/acpi/acpi_bus.h

index 9ac2a9f..7049a7d 100644 (file)
 #include <linux/init.h>
 #include <linux/types.h>
 #include <linux/slab.h>
+#include <linux/pm_runtime.h>
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
 #include "sleep.h"
+#include "internal.h"
 
 #define PREFIX "ACPI: "
 
@@ -77,6 +79,20 @@ static struct acpi_driver acpi_power_driver = {
                },
 };
 
+/*
+ * A power managed device
+ * A device may rely on multiple power resources.
+ * */
+struct acpi_power_managed_device {
+       struct device *dev; /* The physical device */
+       acpi_handle *handle;
+};
+
+struct acpi_power_resource_device {
+       struct acpi_power_managed_device *device;
+       struct acpi_power_resource_device *next;
+};
+
 struct acpi_power_resource {
        struct acpi_device * device;
        acpi_bus_id name;
@@ -84,6 +100,9 @@ struct acpi_power_resource {
        u32 order;
        unsigned int ref_count;
        struct mutex resource_lock;
+
+       /* List of devices relying on this power resource */
+       struct acpi_power_resource_device *devices;
 };
 
 static struct list_head acpi_power_resource_list;
@@ -183,8 +202,26 @@ static int acpi_power_get_list_state(struct acpi_handle_list *list, int *state)
        return 0;
 }
 
+/* Resume the device when all power resources in _PR0 are on */
+static void acpi_power_on_device(struct acpi_power_managed_device *device)
+{
+       struct acpi_device *acpi_dev;
+       acpi_handle handle = device->handle;
+       int state;
+
+       if (acpi_bus_get_device(handle, &acpi_dev))
+               return;
+
+       if(acpi_power_get_inferred_state(acpi_dev, &state))
+               return;
+
+       if (state == ACPI_STATE_D0 && pm_runtime_suspended(device->dev))
+               pm_request_resume(device->dev);
+}
+
 static int __acpi_power_on(struct acpi_power_resource *resource)
 {
+       struct acpi_power_resource_device *device_list = resource->devices;
        acpi_status status = AE_OK;
 
        status = acpi_evaluate_object(resource->device->handle, "_ON", NULL, NULL);
@@ -197,6 +234,12 @@ static int __acpi_power_on(struct acpi_power_resource *resource)
        ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Power resource [%s] turned on\n",
                          resource->name));
 
+       while (device_list) {
+               acpi_power_on_device(device_list->device);
+
+               device_list = device_list->next;
+       }
+
        return 0;
 }
 
@@ -299,6 +342,125 @@ static int acpi_power_on_list(struct acpi_handle_list *list)
        return result;
 }
 
+static void __acpi_power_resource_unregister_device(struct device *dev,
+               acpi_handle res_handle)
+{
+       struct acpi_power_resource *resource = NULL;
+       struct acpi_power_resource_device *prev, *curr;
+
+       if (acpi_power_get_context(res_handle, &resource))
+               return;
+
+       mutex_lock(&resource->resource_lock);
+       prev = NULL;
+       curr = resource->devices;
+       while (curr) {
+               if (curr->device->dev == dev) {
+                       if (!prev)
+                               resource->devices = curr->next;
+                       else
+                               prev->next = curr->next;
+
+                       kfree(curr);
+                       break;
+               }
+
+               prev = curr;
+               curr = curr->next;
+       }
+       mutex_unlock(&resource->resource_lock);
+}
+
+/* Unlink dev from all power resources in _PR0 */
+void acpi_power_resource_unregister_device(struct device *dev, acpi_handle handle)
+{
+       struct acpi_device *acpi_dev;
+       struct acpi_handle_list *list;
+       int i;
+
+       if (!dev || !handle)
+               return;
+
+       if (acpi_bus_get_device(handle, &acpi_dev))
+               return;
+
+       list = &acpi_dev->power.states[ACPI_STATE_D0].resources;
+
+       for (i = 0; i < list->count; i++)
+               __acpi_power_resource_unregister_device(dev,
+                       list->handles[i]);
+}
+
+static int __acpi_power_resource_register_device(
+       struct acpi_power_managed_device *powered_device, acpi_handle handle)
+{
+       struct acpi_power_resource *resource = NULL;
+       struct acpi_power_resource_device *power_resource_device;
+       int result;
+
+       result = acpi_power_get_context(handle, &resource);
+       if (result)
+               return result;
+
+       power_resource_device = kzalloc(
+               sizeof(*power_resource_device), GFP_KERNEL);
+       if (!power_resource_device)
+               return -ENOMEM;
+
+       power_resource_device->device = powered_device;
+
+       mutex_lock(&resource->resource_lock);
+       power_resource_device->next = resource->devices;
+       resource->devices = power_resource_device;
+       mutex_unlock(&resource->resource_lock);
+
+       return 0;
+}
+
+/* Link dev to all power resources in _PR0 */
+int acpi_power_resource_register_device(struct device *dev, acpi_handle handle)
+{
+       struct acpi_device *acpi_dev;
+       struct acpi_handle_list *list;
+       struct acpi_power_managed_device *powered_device;
+       int i, ret;
+
+       if (!dev || !handle)
+               return -ENODEV;
+
+       ret = acpi_bus_get_device(handle, &acpi_dev);
+       if (ret)
+               goto no_power_resource;
+
+       if (!acpi_dev->power.flags.power_resources)
+               goto no_power_resource;
+
+       powered_device = kzalloc(sizeof(*powered_device), GFP_KERNEL);
+       if (!powered_device)
+               return -ENOMEM;
+
+       powered_device->dev = dev;
+       powered_device->handle = handle;
+
+       list = &acpi_dev->power.states[ACPI_STATE_D0].resources;
+
+       for (i = 0; i < list->count; i++) {
+               ret = __acpi_power_resource_register_device(powered_device,
+                       list->handles[i]);
+
+               if (ret) {
+                       acpi_power_resource_unregister_device(dev, handle);
+                       break;
+               }
+       }
+
+       return ret;
+
+no_power_resource:
+       printk(KERN_WARNING PREFIX "Invalid Power Resource to register!");
+       return -ENODEV;
+}
+
 /**
  * acpi_device_sleep_wake - execute _DSW (Device Sleep Wake) or (deprecated in
  *                          ACPI 3.0) _PSW (Power State Wake)
@@ -500,14 +662,14 @@ int acpi_power_transition(struct acpi_device *device, int state)
 {
        int result;
 
-       if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3))
+       if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3_COLD))
                return -EINVAL;
 
        if (device->power.state == state)
                return 0;
 
        if ((device->power.state < ACPI_STATE_D0)
-           || (device->power.state > ACPI_STATE_D3))
+           || (device->power.state > ACPI_STATE_D3_COLD))
                return -ENODEV;
 
        /* TBD: Resources must be ordered. */
index 5d24a17..767e2dc 100644 (file)
@@ -884,6 +884,13 @@ static int acpi_bus_get_power_flags(struct acpi_device *device)
                                acpi_bus_add_power_resource(ps->resources.handles[j]);
                }
 
+               /* The exist of _PR3 indicates D3Cold support */
+               if (i == ACPI_STATE_D3) {
+                       status = acpi_get_handle(device->handle, object_name, &handle);
+                       if (ACPI_SUCCESS(status))
+                               device->power.states[ACPI_STATE_D3_COLD].flags.valid = 1;
+               }
+
                /* Evaluate "_PSx" to see if we can do explicit sets */
                object_name[2] = 'S';
                status = acpi_get_handle(device->handle, object_name, &handle);
index acf81fe..1d661b5 100644 (file)
@@ -18,6 +18,7 @@
 #include <linux/reboot.h>
 #include <linux/acpi.h>
 #include <linux/module.h>
+#include <linux/pm_runtime.h>
 
 #include <asm/io.h>
 
@@ -753,6 +754,40 @@ int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p)
 
 #ifdef CONFIG_PM_SLEEP
 /**
+ * acpi_pm_device_run_wake - Enable/disable wake-up for given device.
+ * @phys_dev: Device to enable/disable the platform to wake-up the system for.
+ * @enable: Whether enable or disable the wake-up functionality.
+ *
+ * Find the ACPI device object corresponding to @pci_dev and try to
+ * enable/disable the GPE associated with it.
+ */
+int acpi_pm_device_run_wake(struct device *phys_dev, bool enable)
+{
+       struct acpi_device *dev;
+       acpi_handle handle;
+
+       if (!device_run_wake(phys_dev))
+               return -EINVAL;
+
+       handle = DEVICE_ACPI_HANDLE(phys_dev);
+       if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &dev))) {
+               dev_dbg(phys_dev, "ACPI handle has no context in %s!\n",
+                       __func__);
+               return -ENODEV;
+       }
+
+       if (enable) {
+               acpi_enable_wakeup_device_power(dev, ACPI_STATE_S0);
+               acpi_enable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number);
+       } else {
+               acpi_disable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number);
+               acpi_disable_wakeup_device_power(dev);
+       }
+
+       return 0;
+}
+
+/**
  *     acpi_pm_device_sleep_wake - enable or disable the system wake-up
  *                                  capability of given device
  *     @dev: device to handle
index 060fd22..0f150f2 100644 (file)
@@ -277,40 +277,6 @@ static int acpi_pci_sleep_wake(struct pci_dev *dev, bool enable)
        return 0;
 }
 
-/**
- * acpi_dev_run_wake - Enable/disable wake-up for given device.
- * @phys_dev: Device to enable/disable the platform to wake-up the system for.
- * @enable: Whether enable or disable the wake-up functionality.
- *
- * Find the ACPI device object corresponding to @pci_dev and try to
- * enable/disable the GPE associated with it.
- */
-static int acpi_dev_run_wake(struct device *phys_dev, bool enable)
-{
-       struct acpi_device *dev;
-       acpi_handle handle;
-
-       if (!device_run_wake(phys_dev))
-               return -EINVAL;
-
-       handle = DEVICE_ACPI_HANDLE(phys_dev);
-       if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &dev))) {
-               dev_dbg(phys_dev, "ACPI handle has no context in %s!\n",
-                       __func__);
-               return -ENODEV;
-       }
-
-       if (enable) {
-               acpi_enable_wakeup_device_power(dev, ACPI_STATE_S0);
-               acpi_enable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number);
-       } else {
-               acpi_disable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number);
-               acpi_disable_wakeup_device_power(dev);
-       }
-
-       return 0;
-}
-
 static void acpi_pci_propagate_run_wake(struct pci_bus *bus, bool enable)
 {
        while (bus->parent) {
@@ -318,14 +284,14 @@ static void acpi_pci_propagate_run_wake(struct pci_bus *bus, bool enable)
 
                if (bridge->pme_interrupt)
                        return;
-               if (!acpi_dev_run_wake(&bridge->dev, enable))
+               if (!acpi_pm_device_run_wake(&bridge->dev, enable))
                        return;
                bus = bus->parent;
        }
 
        /* We have reached the root bus. */
        if (bus->bridge)
-               acpi_dev_run_wake(bus->bridge, enable);
+               acpi_pm_device_run_wake(bus->bridge, enable);
 }
 
 static int acpi_pci_run_wake(struct pci_dev *dev, bool enable)
@@ -333,7 +299,7 @@ static int acpi_pci_run_wake(struct pci_dev *dev, bool enable)
        if (dev->pme_interrupt)
                return 0;
 
-       if (!acpi_dev_run_wake(&dev->dev, enable))
+       if (!acpi_pm_device_run_wake(&dev->dev, enable))
                return 0;
 
        acpi_pci_propagate_run_wake(dev->bus, enable);
index 6cd5b64..f1c8ca6 100644 (file)
@@ -323,6 +323,8 @@ 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);
+int acpi_power_resource_register_device(struct device *dev, acpi_handle handle);
+void acpi_power_resource_unregister_device(struct device *dev, acpi_handle handle);
 #ifdef CONFIG_ACPI_PROC_EVENT
 int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data);
 int acpi_bus_generate_proc_event4(const char *class, const char *bid, u8 type, int data);
@@ -392,8 +394,13 @@ static inline int acpi_pm_device_sleep_state(struct device *d, int *p)
 #endif
 
 #ifdef CONFIG_PM_SLEEP
+int acpi_pm_device_run_wake(struct device *, bool);
 int acpi_pm_device_sleep_wake(struct device *, bool);
 #else
+static inline int acpi_pm_device_run_wake(struct device *dev, bool enable)
+{
+       return -ENODEV;
+}
 static inline int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
 {
        return -ENODEV;