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Merge branch 'acpi-hotplug'

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* acpi-hotplug:
  ACPI / hotplug: Rework deferred execution of acpi_device_hotplug()
  ACPI / dock: Update copyright notice
  ACPI / dock: Drop remove_dock_dependent_devices()
  ACPI / dock: Drop struct acpi_dock_ops and all code related to it
  ACPI / ATA: Add hotplug contexts to ACPI companions of SATA devices
  ACPI / dock: Add .uevent() callback to struct acpi_hotplug_context
  ACPI / dock: Use callback pointers from devices' ACPI hotplug contexts
  ACPI / dock: Use ACPI device object pointers instead of ACPI handles
  ACPI / hotplug: Add .fixup() callback to struct acpi_hotplug_context
  ACPI / hotplug / PCI: Do not clear event callback pointer for docks
  ACPI / dock: Associate dock platform devices with ACPI device objects
  ACPI / dock: Pass ACPI device pointer to acpi_device_is_battery()
  ACPI / dock: Dispatch dock notifications from the global notify handler
This commit is contained in:
Rafael J. Wysocki 2014-03-17 13:47:14 +01:00
commit 6621c5a69a
10 changed files with 298 additions and 508 deletions
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2
drivers/acpi/bus.c
View File

@ -400,7 +400,7 @@ static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
case ACPI_NOTIFY_BUS_CHECK:
case ACPI_NOTIFY_DEVICE_CHECK:
case ACPI_NOTIFY_EJECT_REQUEST:
status = acpi_hotplug_execute(acpi_device_hotplug, adev, type);
status = acpi_hotplug_schedule(adev, type);
if (ACPI_SUCCESS(status))
return;
default:

3
drivers/acpi/container.c
View File

@ -68,6 +68,9 @@ static int container_device_attach(struct acpi_device *adev,
struct device *dev;
int ret;
if (adev->flags.is_dock_station)
return 0;
cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
if (!cdev)
return -ENOMEM;

456
drivers/acpi/dock.c
View File

@ -1,7 +1,9 @@
/*
* dock.c - ACPI dock station driver
*
* Copyright (C) 2006 Kristen Carlson Accardi <kristen.c.accardi@intel.com>
* Copyright (C) 2006, 2014, Intel Corp.
* Author: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
* Rafael J. Wysocki <rafael.j.wysocki@intel.com>
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
@ -68,15 +70,10 @@ struct dock_station {
};
static LIST_HEAD(dock_stations);
static int dock_station_count;
static DEFINE_MUTEX(hotplug_lock);
struct dock_dependent_device {
struct list_head list;
acpi_handle handle;
const struct acpi_dock_ops *hp_ops;
void *hp_context;
unsigned int hp_refcount;
void (*hp_release)(void *);
struct acpi_device *adev;
};
#define DOCK_DOCKING 0x00000001
@ -98,13 +95,13 @@ enum dock_callback_type {
*****************************************************************************/
/**
* add_dock_dependent_device - associate a device with the dock station
* @ds: The dock station
* @handle: handle of the dependent device
* @ds: Dock station.
* @adev: Dependent ACPI device object.
*
* Add the dependent device to the dock's dependent device list.
*/
static int __init
add_dock_dependent_device(struct dock_station *ds, acpi_handle handle)
static int add_dock_dependent_device(struct dock_station *ds,
struct acpi_device *adev)
{
struct dock_dependent_device *dd;
@ -112,180 +109,120 @@ add_dock_dependent_device(struct dock_station *ds, acpi_handle handle)
if (!dd)
return -ENOMEM;
dd->handle = handle;
dd->adev = adev;
INIT_LIST_HEAD(&dd->list);
list_add_tail(&dd->list, &ds->dependent_devices);
return 0;
}
static void remove_dock_dependent_devices(struct dock_station *ds)
{
struct dock_dependent_device *dd, *aux;
list_for_each_entry_safe(dd, aux, &ds->dependent_devices, list) {
list_del(&dd->list);
kfree(dd);
}
}
/**
* dock_init_hotplug - Initialize a hotplug device on a docking station.
* @dd: Dock-dependent device.
* @ops: Dock operations to attach to the dependent device.
* @context: Data to pass to the @ops callbacks and @release.
* @init: Optional initialization routine to run after setting up context.
* @release: Optional release routine to run on removal.
*/
static int dock_init_hotplug(struct dock_dependent_device *dd,
const struct acpi_dock_ops *ops, void *context,
void (*init)(void *), void (*release)(void *))
{
int ret = 0;
mutex_lock(&hotplug_lock);
if (WARN_ON(dd->hp_context)) {
ret = -EEXIST;
} else {
dd->hp_refcount = 1;
dd->hp_ops = ops;
dd->hp_context = context;
dd->hp_release = release;
if (init)
init(context);
}
mutex_unlock(&hotplug_lock);
return ret;
}
/**
* dock_release_hotplug - Decrement hotplug reference counter of dock device.
* @dd: Dock-dependent device.
*
* Decrement the reference counter of @dd and if 0, detach its hotplug
* operations from it, reset its context pointer and run the optional release
* routine if present.
*/
static void dock_release_hotplug(struct dock_dependent_device *dd)
{
mutex_lock(&hotplug_lock);
if (dd->hp_context && !--dd->hp_refcount) {
void (*release)(void *) = dd->hp_release;
void *context = dd->hp_context;
dd->hp_ops = NULL;
dd->hp_context = NULL;
dd->hp_release = NULL;
if (release)
release(context);
}
mutex_unlock(&hotplug_lock);
}
static void dock_hotplug_event(struct dock_dependent_device *dd, u32 event,
enum dock_callback_type cb_type)
{
acpi_notify_handler cb = NULL;
bool run = false;
struct acpi_device *adev = dd->adev;
mutex_lock(&hotplug_lock);
acpi_lock_hp_context();
if (dd->hp_context) {
run = true;
dd->hp_refcount++;
if (dd->hp_ops) {
switch (cb_type) {
case DOCK_CALL_FIXUP:
cb = dd->hp_ops->fixup;
break;
case DOCK_CALL_UEVENT:
cb = dd->hp_ops->uevent;
break;
default:
cb = dd->hp_ops->handler;
}
if (!adev->hp)
goto out;
if (cb_type == DOCK_CALL_FIXUP) {
void (*fixup)(struct acpi_device *);
fixup = adev->hp->fixup;
if (fixup) {
acpi_unlock_hp_context();
fixup(adev);
return;
}
} else if (cb_type == DOCK_CALL_UEVENT) {
void (*uevent)(struct acpi_device *, u32);
uevent = adev->hp->uevent;
if (uevent) {
acpi_unlock_hp_context();
uevent(adev, event);
return;
}
} else {
int (*notify)(struct acpi_device *, u32);
notify = adev->hp->notify;
if (notify) {
acpi_unlock_hp_context();
notify(adev, event);
return;
}
}
mutex_unlock(&hotplug_lock);
out:
acpi_unlock_hp_context();
}
if (!run)
return;
static struct dock_station *find_dock_station(acpi_handle handle)
{
struct dock_station *ds;
if (cb)
cb(dd->handle, event, dd->hp_context);
list_for_each_entry(ds, &dock_stations, sibling)
if (ds->handle == handle)
return ds;
dock_release_hotplug(dd);
return NULL;
}
/**
* find_dock_dependent_device - get a device dependent on this dock
* @ds: the dock station
* @handle: the acpi_handle of the device we want
* @adev: ACPI device object to find.
*
* iterate over the dependent device list for this dock. If the
* dependent device matches the handle, return.
*/
static struct dock_dependent_device *
find_dock_dependent_device(struct dock_station *ds, acpi_handle handle)
find_dock_dependent_device(struct dock_station *ds, struct acpi_device *adev)
{
struct dock_dependent_device *dd;
list_for_each_entry(dd, &ds->dependent_devices, list)
if (handle == dd->handle)
if (adev == dd->adev)
return dd;
return NULL;
}
void register_dock_dependent_device(struct acpi_device *adev,
acpi_handle dshandle)
{
struct dock_station *ds = find_dock_station(dshandle);
if (ds && !find_dock_dependent_device(ds, adev))
add_dock_dependent_device(ds, adev);
}
/*****************************************************************************
* Dock functions *
*****************************************************************************/
static int __init is_battery(acpi_handle handle)
{
struct acpi_device_info *info;
int ret = 1;
if (!ACPI_SUCCESS(acpi_get_object_info(handle, &info)))
return 0;
if (!(info->valid & ACPI_VALID_HID))
ret = 0;
else
ret = !strcmp("PNP0C0A", info->hardware_id.string);
kfree(info);
return ret;
}
/* Check whether ACPI object is an ejectable battery or disk bay */
static bool __init is_ejectable_bay(acpi_handle handle)
{
if (acpi_has_method(handle, "_EJ0") && is_battery(handle))
return true;
return acpi_bay_match(handle);
}
/**
* is_dock_device - see if a device is on a dock station
* @handle: acpi handle of the device
* @adev: ACPI device object to check.
*
* If this device is either the dock station itself,
* or is a device dependent on the dock station, then it
* is a dock device
*/
int is_dock_device(acpi_handle handle)
int is_dock_device(struct acpi_device *adev)
{
struct dock_station *dock_station;
if (!dock_station_count)
return 0;
if (acpi_dock_match(handle))
if (acpi_dock_match(adev->handle))
return 1;
list_for_each_entry(dock_station, &dock_stations, sibling)
if (find_dock_dependent_device(dock_station, handle))
if (find_dock_dependent_device(dock_station, adev))
return 1;
return 0;
@ -312,43 +249,6 @@ static int dock_present(struct dock_station *ds)
return 0;
}
/**
* dock_create_acpi_device - add new devices to acpi
* @handle - handle of the device to add
*
* This function will create a new acpi_device for the given
* handle if one does not exist already. This should cause
* acpi to scan for drivers for the given devices, and call
* matching driver's add routine.
*/
static void dock_create_acpi_device(acpi_handle handle)
{
struct acpi_device *device = NULL;
int ret;
acpi_bus_get_device(handle, &device);
if (!acpi_device_enumerated(device)) {
ret = acpi_bus_scan(handle);
if (ret)
pr_debug("error adding bus, %x\n", -ret);
}
}
/**
* dock_remove_acpi_device - remove the acpi_device struct from acpi
* @handle - the handle of the device to remove
*
* Tell acpi to remove the acpi_device. This should cause any loaded
* driver to have it's remove routine called.
*/
static void dock_remove_acpi_device(acpi_handle handle)
{
struct acpi_device *device;
if (!acpi_bus_get_device(handle, &device))
acpi_bus_trim(device);
}
/**
* hot_remove_dock_devices - Remove dock station devices.
* @ds: Dock station.
@ -366,7 +266,7 @@ static void hot_remove_dock_devices(struct dock_station *ds)
dock_hotplug_event(dd, ACPI_NOTIFY_EJECT_REQUEST, false);
list_for_each_entry_reverse(dd, &ds->dependent_devices, list)
dock_remove_acpi_device(dd->handle);
acpi_bus_trim(dd->adev);
}
/**
@ -392,12 +292,20 @@ static void hotplug_dock_devices(struct dock_station *ds, u32 event)
dock_hotplug_event(dd, event, DOCK_CALL_HANDLER);
/*
* Now make sure that an acpi_device is created for each dependent
* device. That will cause scan handlers to be attached to device
* objects or acpi_drivers to be stopped/started if they are present.
* Check if all devices have been enumerated already. If not, run
* acpi_bus_scan() for them and that will cause scan handlers to be
* attached to device objects or acpi_drivers to be stopped/started if
* they are present.
*/
list_for_each_entry(dd, &ds->dependent_devices, list)
dock_create_acpi_device(dd->handle);
list_for_each_entry(dd, &ds->dependent_devices, list) {
struct acpi_device *adev = dd->adev;
if (!acpi_device_enumerated(adev)) {
int ret = acpi_bus_scan(adev->handle);
if (ret)
dev_dbg(&adev->dev, "scan error %d\n", -ret);
}
}
}
static void dock_event(struct dock_station *ds, u32 event, int num)
@ -500,71 +408,6 @@ static int dock_in_progress(struct dock_station *ds)
return 0;
}
/**
* register_hotplug_dock_device - register a hotplug function
* @handle: the handle of the device
* @ops: handlers to call after docking
* @context: device specific data
* @init: Optional initialization routine to run after registration
* @release: Optional release routine to run on unregistration
*
* If a driver would like to perform a hotplug operation after a dock
* event, they can register an acpi_notifiy_handler to be called by
* the dock driver after _DCK is executed.
*/
int register_hotplug_dock_device(acpi_handle handle,
const struct acpi_dock_ops *ops, void *context,
void (*init)(void *), void (*release)(void *))
{
struct dock_dependent_device *dd;
struct dock_station *dock_station;
int ret = -EINVAL;
if (WARN_ON(!context))
return -EINVAL;
if (!dock_station_count)
return -ENODEV;
/*
* make sure this handle is for a device dependent on the dock,
* this would include the dock station itself
*/
list_for_each_entry(dock_station, &dock_stations, sibling) {
/*
* An ATA bay can be in a dock and itself can be ejected
* separately, so there are two 'dock stations' which need the
* ops
*/
dd = find_dock_dependent_device(dock_station, handle);
if (dd && !dock_init_hotplug(dd, ops, context, init, release))
ret = 0;
}
return ret;
}
EXPORT_SYMBOL_GPL(register_hotplug_dock_device);
/**
* unregister_hotplug_dock_device - remove yourself from the hotplug list
* @handle: the acpi handle of the device
*/
void unregister_hotplug_dock_device(acpi_handle handle)
{
struct dock_dependent_device *dd;
struct dock_station *dock_station;
if (!dock_station_count)
return;
list_for_each_entry(dock_station, &dock_stations, sibling) {
dd = find_dock_dependent_device(dock_station, handle);
if (dd)
dock_release_hotplug(dd);
}
}
EXPORT_SYMBOL_GPL(unregister_hotplug_dock_device);
/**
* handle_eject_request - handle an undock request checking for error conditions
*
@ -598,20 +441,23 @@ static int handle_eject_request(struct dock_station *ds, u32 event)
}
/**
* dock_notify - act upon an acpi dock notification
* @ds: dock station
* @event: the acpi event
* dock_notify - Handle ACPI dock notification.
* @adev: Dock station's ACPI device object.
* @event: Event code.
*
* If we are notified to dock, then check to see if the dock is
* present and then dock. Notify all drivers of the dock event,
* and then hotplug and devices that may need hotplugging.
*/
static void dock_notify(struct dock_station *ds, u32 event)
int dock_notify(struct acpi_device *adev, u32 event)
{
acpi_handle handle = ds->handle;
struct acpi_device *adev = NULL;
acpi_handle handle = adev->handle;
struct dock_station *ds = find_dock_station(handle);
int surprise_removal = 0;
if (!ds)
return -ENODEV;
/*
* According to acpi spec 3.0a, if a DEVICE_CHECK notification
* is sent and _DCK is present, it is assumed to mean an undock
@ -632,7 +478,6 @@ static void dock_notify(struct dock_station *ds, u32 event)
switch (event) {
case ACPI_NOTIFY_BUS_CHECK:
case ACPI_NOTIFY_DEVICE_CHECK:
acpi_bus_get_device(handle, &adev);
if (!dock_in_progress(ds) && !acpi_device_enumerated(adev)) {
begin_dock(ds);
dock(ds);
@ -662,49 +507,8 @@ static void dock_notify(struct dock_station *ds, u32 event)
else
dock_event(ds, event, UNDOCK_EVENT);
break;
default:
acpi_handle_err(handle, "Unknown dock event %d\n", event);
}
}
static void acpi_dock_deferred_cb(void *data, u32 event)
{
acpi_scan_lock_acquire();
dock_notify(data, event);
acpi_scan_lock_release();
}
static void dock_notify_handler(acpi_handle handle, u32 event, void *data)
{
if (event != ACPI_NOTIFY_BUS_CHECK && event != ACPI_NOTIFY_DEVICE_CHECK
&& event != ACPI_NOTIFY_EJECT_REQUEST)
return;
acpi_hotplug_execute(acpi_dock_deferred_cb, data, event);
}
/**
* find_dock_devices - find devices on the dock station
* @handle: the handle of the device we are examining
* @lvl: unused
* @context: the dock station private data
* @rv: unused
*
* This function is called by acpi_walk_namespace. It will
* check to see if an object has an _EJD method. If it does, then it
* will see if it is dependent on the dock station.
*/
static acpi_status __init find_dock_devices(acpi_handle handle, u32 lvl,
void *context, void **rv)
{
struct dock_station *ds = context;
acpi_handle ejd = NULL;
acpi_bus_get_ejd(handle, &ejd);
if (ejd == ds->handle)
add_dock_dependent_device(ds, handle);
return AE_OK;
return 0;
}
/*
@ -803,23 +607,28 @@ static struct attribute_group dock_attribute_group = {
};
/**
* dock_add - add a new dock station
* @handle: the dock station handle
* acpi_dock_add - Add a new dock station
* @adev: Dock station ACPI device object.
*
* allocated and initialize a new dock station device. Find all devices
* that are on the dock station, and register for dock event notifications.
* allocated and initialize a new dock station device.
*/
static int __init dock_add(acpi_handle handle)
void acpi_dock_add(struct acpi_device *adev)
{
struct dock_station *dock_station, ds = { NULL, };
struct platform_device_info pdevinfo;
acpi_handle handle = adev->handle;
struct platform_device *dd;
acpi_status status;
int ret;
dd = platform_device_register_data(NULL, "dock", dock_station_count,
&ds, sizeof(ds));
memset(&pdevinfo, 0, sizeof(pdevinfo));
pdevinfo.name = "dock";
pdevinfo.id = dock_station_count;
pdevinfo.acpi_node.companion = adev;
pdevinfo.data = &ds;
pdevinfo.size_data = sizeof(ds);
dd = platform_device_register_full(&pdevinfo);
if (IS_ERR(dd))
return PTR_ERR(dd);
return;
dock_station = dd->dev.platform_data;
@ -837,72 +646,29 @@ static int __init dock_add(acpi_handle handle)
dock_station->flags |= DOCK_IS_DOCK;
if (acpi_ata_match(handle))
dock_station->flags |= DOCK_IS_ATA;
if (is_battery(handle))
if (acpi_device_is_battery(adev))
dock_station->flags |= DOCK_IS_BAT;
ret = sysfs_create_group(&dd->dev.kobj, &dock_attribute_group);
if (ret)
goto err_unregister;
/* Find dependent devices */
acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, find_dock_devices, NULL,
dock_station, NULL);
/* add the dock station as a device dependent on itself */
ret = add_dock_dependent_device(dock_station, handle);
ret = add_dock_dependent_device(dock_station, adev);
if (ret)
goto err_rmgroup;
status = acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
dock_notify_handler, dock_station);
if (ACPI_FAILURE(status)) {
ret = -ENODEV;
goto err_rmgroup;
}
dock_station_count++;
list_add(&dock_station->sibling, &dock_stations);
return 0;
adev->flags.is_dock_station = true;
dev_info(&adev->dev, "ACPI dock station (docks/bays count: %d)\n",
dock_station_count);
return;
err_rmgroup:
remove_dock_dependent_devices(dock_station);
sysfs_remove_group(&dd->dev.kobj, &dock_attribute_group);
err_unregister:
platform_device_unregister(dd);
acpi_handle_err(handle, "%s encountered error %d\n", __func__, ret);
return ret;
}
/**
* find_dock_and_bay - look for dock stations and bays
* @handle: acpi handle of a device
* @lvl: unused
* @context: unused
* @rv: unused
*
* This is called by acpi_walk_namespace to look for dock stations and bays.
*/
static acpi_status __init
find_dock_and_bay(acpi_handle handle, u32 lvl, void *context, void **rv)
{
if (acpi_dock_match(handle) || is_ejectable_bay(handle))
dock_add(handle);
return AE_OK;
}
void __init acpi_dock_init(void)
{
/* look for dock stations and bays */
acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, find_dock_and_bay, NULL, NULL, NULL);
if (!dock_station_count) {
pr_info(PREFIX "No dock devices found.\n");
return;
}
pr_info(PREFIX "%s: %d docks/bays found\n",
ACPI_DOCK_DRIVER_DESCRIPTION, dock_station_count);
}

14
drivers/acpi/internal.h
View File

@ -37,9 +37,15 @@ void acpi_container_init(void);
static inline void acpi_container_init(void) {}
#endif
#ifdef CONFIG_ACPI_DOCK
void acpi_dock_init(void);
void register_dock_dependent_device(struct acpi_device *adev,
acpi_handle dshandle);
int dock_notify(struct acpi_device *adev, u32 event);
void acpi_dock_add(struct acpi_device *adev);
#else
static inline void acpi_dock_init(void) {}
static inline void register_dock_dependent_device(struct acpi_device *adev,
acpi_handle dshandle) {}
static inline int dock_notify(struct acpi_device *adev, u32 event) { return -ENODEV; }
static inline void acpi_dock_add(struct acpi_device *adev) {}
#endif
#ifdef CONFIG_ACPI_HOTPLUG_MEMORY
void acpi_memory_hotplug_init(void);
@ -72,8 +78,9 @@ void acpi_lpss_init(void);
static inline void acpi_lpss_init(void) {}
#endif
acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src);
bool acpi_queue_hotplug_work(struct work_struct *work);
void acpi_device_hotplug(void *data, u32 src);
void acpi_device_hotplug(struct acpi_device *adev, u32 src);
bool acpi_scan_is_offline(struct acpi_device *adev, bool uevent);
/* --------------------------------------------------------------------------
@ -91,6 +98,7 @@ void acpi_free_pnp_ids(struct acpi_device_pnp *pnp);
int acpi_bind_one(struct device *dev, struct acpi_device *adev);
int acpi_unbind_one(struct device *dev);
bool acpi_device_is_present(struct acpi_device *adev);
bool acpi_device_is_battery(struct acpi_device *adev);
/* --------------------------------------------------------------------------
Power Resource

14
drivers/acpi/osl.c
View File

@ -1168,8 +1168,7 @@ void acpi_os_wait_events_complete(void)
struct acpi_hp_work {
struct work_struct work;
acpi_hp_callback func;
void *data;
struct acpi_device *adev;
u32 src;
};
@ -1178,25 +1177,24 @@ static void acpi_hotplug_work_fn(struct work_struct *work)
struct acpi_hp_work *hpw = container_of(work, struct acpi_hp_work, work);
acpi_os_wait_events_complete();
hpw->func(hpw->data, hpw->src);
acpi_device_hotplug(hpw->adev, hpw->src);
kfree(hpw);
}
acpi_status acpi_hotplug_execute(acpi_hp_callback func, void *data, u32 src)
acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src)
{
struct acpi_hp_work *hpw;
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"Scheduling function [%p(%p, %u)] for deferred execution.\n",
func, data, src));
"Scheduling hotplug event (%p, %u) for deferred execution.\n",
adev, src));
hpw = kmalloc(sizeof(*hpw), GFP_KERNEL);
if (!hpw)
return AE_NO_MEMORY;
INIT_WORK(&hpw->work, acpi_hotplug_work_fn);
hpw->func = func;
hpw->data = data;
hpw->adev = adev;
hpw->src = src;
/*
* We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because

59
drivers/acpi/scan.c
View File

@ -71,6 +71,17 @@ void acpi_unlock_hp_context(void)
mutex_unlock(&acpi_hp_context_lock);
}
void acpi_initialize_hp_context(struct acpi_device *adev,
struct acpi_hotplug_context *hp,
int (*notify)(struct acpi_device *, u32),
void (*uevent)(struct acpi_device *, u32))
{
acpi_lock_hp_context();
acpi_set_hp_context(adev, hp, notify, uevent, NULL);
acpi_unlock_hp_context();
}
EXPORT_SYMBOL_GPL(acpi_initialize_hp_context);
int acpi_scan_add_handler(struct acpi_scan_handler *handler)
{
if (!handler || !handler->attach)
@ -470,10 +481,9 @@ static int acpi_generic_hotplug_event(struct acpi_device *adev, u32 type)
return -EINVAL;
}
void acpi_device_hotplug(void *data, u32 src)
void acpi_device_hotplug(struct acpi_device *adev, u32 src)
{
u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE;
struct acpi_device *adev = data;
int error = -ENODEV;
lock_device_hotplug();
@ -487,24 +497,26 @@ void acpi_device_hotplug(void *data, u32 src)
if (adev->handle == INVALID_ACPI_HANDLE)
goto err_out;
if (adev->flags.hotplug_notify) {
if (adev->flags.is_dock_station) {
error = dock_notify(adev, src);
} else if (adev->flags.hotplug_notify) {
error = acpi_generic_hotplug_event(adev, src);
if (error == -EPERM) {
ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED;
goto err_out;
}
} else {
int (*event)(struct acpi_device *, u32);
int (*notify)(struct acpi_device *, u32);
acpi_lock_hp_context();
event = adev->hp ? adev->hp->event : NULL;
notify = adev->hp ? adev->hp->notify : NULL;
acpi_unlock_hp_context();
/*
* There may be additional notify handlers for device objects
* without the .event() callback, so ignore them here.
*/
if (event)
error = event(adev, src);
if (notify)
error = notify(adev, src);
else
goto out;
}
@ -566,8 +578,7 @@ acpi_eject_store(struct device *d, struct device_attribute *attr,
return -ENODEV;
get_device(&acpi_device->dev);
status = acpi_hotplug_execute(acpi_device_hotplug, acpi_device,
ACPI_OST_EC_OSPM_EJECT);
status = acpi_hotplug_schedule(acpi_device, ACPI_OST_EC_OSPM_EJECT);
if (ACPI_SUCCESS(status))
return count;
@ -1660,6 +1671,27 @@ bool acpi_bay_match(acpi_handle handle)
return acpi_ata_match(phandle);
}
bool acpi_device_is_battery(struct acpi_device *adev)
{
struct acpi_hardware_id *hwid;
list_for_each_entry(hwid, &adev->pnp.ids, list)
if (!strcmp("PNP0C0A", hwid->id))
return true;
return false;
}
static bool is_ejectable_bay(struct acpi_device *adev)
{
acpi_handle handle = adev->handle;
if (acpi_has_method(handle, "_EJ0") && acpi_device_is_battery(adev))
return true;
return acpi_bay_match(handle);
}
/*
* acpi_dock_match - see if an acpi object has a _DCK method
*/
@ -1964,6 +1996,10 @@ static void acpi_scan_init_hotplug(struct acpi_device *adev)
{
struct acpi_hardware_id *hwid;
if (acpi_dock_match(adev->handle) || is_ejectable_bay(adev)) {
acpi_dock_add(adev);
return;
}
list_for_each_entry(hwid, &adev->pnp.ids, list) {
struct acpi_scan_handler *handler;
@ -2035,8 +2071,12 @@ static int acpi_scan_attach_handler(struct acpi_device *device)
static void acpi_bus_attach(struct acpi_device *device)
{
struct acpi_device *child;
acpi_handle ejd;
int ret;
if (ACPI_SUCCESS(acpi_bus_get_ejd(device->handle, &ejd)))
register_dock_dependent_device(device, ejd);
acpi_bus_get_status(device);
/* Skip devices that are not present. */
if (!acpi_device_is_present(device)) {
@ -2189,7 +2229,6 @@ int __init acpi_scan_init(void)
acpi_cmos_rtc_init();
acpi_container_init();
acpi_memory_hotplug_init();
acpi_dock_init();
mutex_lock(&acpi_scan_lock);
/*

72
drivers/ata/libata-acpi.c
View File

@ -38,6 +38,16 @@ static void ata_acpi_clear_gtf(struct ata_device *dev)
dev->gtf_cache = NULL;
}
struct ata_acpi_hotplug_context {
struct acpi_hotplug_context hp;
union {
struct ata_port *ap;
struct ata_device *dev;
} data;
};
#define ata_hotplug_data(context) (container_of((context), struct ata_acpi_hotplug_context, hp)->data)
/**
* ata_dev_acpi_handle - provide the acpi_handle for an ata_device
* @dev: the acpi_handle returned will correspond to this device
@ -121,18 +131,17 @@ static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device *dev,
ata_port_wait_eh(ap);
}
static void ata_acpi_dev_notify_dock(acpi_handle handle, u32 event, void *data)
static int ata_acpi_dev_notify_dock(struct acpi_device *adev, u32 event)
{
struct ata_device *dev = data;
struct ata_device *dev = ata_hotplug_data(adev->hp).dev;
ata_acpi_handle_hotplug(dev->link->ap, dev, event);
return 0;
}
static void ata_acpi_ap_notify_dock(acpi_handle handle, u32 event, void *data)
static int ata_acpi_ap_notify_dock(struct acpi_device *adev, u32 event)
{
struct ata_port *ap = data;
ata_acpi_handle_hotplug(ap, NULL, event);
ata_acpi_handle_hotplug(ata_hotplug_data(adev->hp).ap, NULL, event);
return 0;
}
static void ata_acpi_uevent(struct ata_port *ap, struct ata_device *dev,
@ -154,31 +163,23 @@ static void ata_acpi_uevent(struct ata_port *ap, struct ata_device *dev,
}
}
static void ata_acpi_ap_uevent(acpi_handle handle, u32 event, void *data)
static void ata_acpi_ap_uevent(struct acpi_device *adev, u32 event)
{
ata_acpi_uevent(data, NULL, event);
ata_acpi_uevent(ata_hotplug_data(adev->hp).ap, NULL, event);
}
static void ata_acpi_dev_uevent(acpi_handle handle, u32 event, void *data)
static void ata_acpi_dev_uevent(struct acpi_device *adev, u32 event)
{
struct ata_device *dev = data;
struct ata_device *dev = ata_hotplug_data(adev->hp).dev;
ata_acpi_uevent(dev->link->ap, dev, event);
}
static const struct acpi_dock_ops ata_acpi_dev_dock_ops = {
.handler = ata_acpi_dev_notify_dock,
.uevent = ata_acpi_dev_uevent,
};
static const struct acpi_dock_ops ata_acpi_ap_dock_ops = {
.handler = ata_acpi_ap_notify_dock,
.uevent = ata_acpi_ap_uevent,
};
/* bind acpi handle to pata port */
void ata_acpi_bind_port(struct ata_port *ap)
{
struct acpi_device *host_companion = ACPI_COMPANION(ap->host->dev);
struct acpi_device *adev;
struct ata_acpi_hotplug_context *context;
if (libata_noacpi || ap->flags & ATA_FLAG_ACPI_SATA || !host_companion)
return;
@ -188,9 +189,17 @@ void ata_acpi_bind_port(struct ata_port *ap)
if (ata_acpi_gtm(ap, &ap->__acpi_init_gtm) == 0)
ap->pflags |= ATA_PFLAG_INIT_GTM_VALID;
/* we might be on a docking station */
register_hotplug_dock_device(ACPI_HANDLE(&ap->tdev),
&ata_acpi_ap_dock_ops, ap, NULL, NULL);
adev = ACPI_COMPANION(&ap->tdev);
if (!adev || adev->hp)
return;
context = kzalloc(sizeof(*context), GFP_KERNEL);
if (!context)
return;
context->data.ap = ap;
acpi_initialize_hp_context(adev, &context->hp, ata_acpi_ap_notify_dock,
ata_acpi_ap_uevent);
}
void ata_acpi_bind_dev(struct ata_device *dev)
@ -198,7 +207,8 @@ void ata_acpi_bind_dev(struct ata_device *dev)
struct ata_port *ap = dev->link->ap;
struct acpi_device *port_companion = ACPI_COMPANION(&ap->tdev);
struct acpi_device *host_companion = ACPI_COMPANION(ap->host->dev);
struct acpi_device *parent;
struct acpi_device *parent, *adev;
struct ata_acpi_hotplug_context *context;
u64 adr;
/*
@ -221,9 +231,17 @@ void ata_acpi_bind_dev(struct ata_device *dev)
}
acpi_preset_companion(&dev->tdev, parent, adr);
adev = ACPI_COMPANION(&dev->tdev);
if (!adev || adev->hp)
return;
register_hotplug_dock_device(ata_dev_acpi_handle(dev),
&ata_acpi_dev_dock_ops, dev, NULL, NULL);
context = kzalloc(sizeof(*context), GFP_KERNEL);
if (!context)
return;
context->data.dev = dev;
acpi_initialize_hp_context(adev, &context->hp, ata_acpi_dev_notify_dock,
ata_acpi_dev_uevent);
}
/**

136
drivers/pci/hotplug/acpiphp_glue.c
View File

@ -59,7 +59,8 @@
static LIST_HEAD(bridge_list);
static DEFINE_MUTEX(bridge_mutex);
static int acpiphp_hotplug_event(struct acpi_device *adev, u32 type);
static int acpiphp_hotplug_notify(struct acpi_device *adev, u32 type);
static void acpiphp_post_dock_fixup(struct acpi_device *adev);
static void acpiphp_sanitize_bus(struct pci_bus *bus);
static void acpiphp_set_hpp_values(struct pci_bus *bus);
static void hotplug_event(u32 type, struct acpiphp_context *context);
@ -80,7 +81,8 @@ static struct acpiphp_context *acpiphp_init_context(struct acpi_device *adev)
return NULL;
context->refcount = 1;
acpi_set_hp_context(adev, &context->hp, acpiphp_hotplug_event);
acpi_set_hp_context(adev, &context->hp, acpiphp_hotplug_notify, NULL,
acpiphp_post_dock_fixup);
return context;
}
@ -130,6 +132,27 @@ static inline void put_bridge(struct acpiphp_bridge *bridge)
kref_put(&bridge->ref, free_bridge);
}
static struct acpiphp_context *acpiphp_grab_context(struct acpi_device *adev)
{
struct acpiphp_context *context;
acpi_lock_hp_context();
context = acpiphp_get_context(adev);
if (!context || context->func.parent->is_going_away) {
acpi_unlock_hp_context();
return NULL;
}
get_bridge(context->func.parent);
acpiphp_put_context(context);
acpi_unlock_hp_context();
return context;
}
static void acpiphp_let_context_go(struct acpiphp_context *context)
{
put_bridge(context->func.parent);
}
static void free_bridge(struct kref *kref)
{
struct acpiphp_context *context;
@ -164,28 +187,29 @@ static void free_bridge(struct kref *kref)
acpi_unlock_hp_context();
}
/*
* the _DCK method can do funny things... and sometimes not
* hah-hah funny.
/**
* acpiphp_post_dock_fixup - Post-dock fixups for PCI devices.
* @adev: ACPI device object corresponding to a PCI device.
*
* TBD - figure out a way to only call fixups for
* systems that require them.
* TBD - figure out a way to only call fixups for systems that require them.
*/
static void post_dock_fixups(acpi_handle not_used, u32 event, void *data)
static void acpiphp_post_dock_fixup(struct acpi_device *adev)
{
struct acpiphp_context *context = data;
struct pci_bus *bus = context->func.slot->bus;
struct acpiphp_context *context = acpiphp_grab_context(adev);
struct pci_bus *bus;
u32 buses;
if (!bus->self)
if (!context)
return;
bus = context->func.slot->bus;
if (!bus->self)
goto out;
/* fixup bad _DCK function that rewrites
* secondary bridge on slot
*/
pci_read_config_dword(bus->self,
PCI_PRIMARY_BUS,
&buses);
pci_read_config_dword(bus->self, PCI_PRIMARY_BUS, &buses);
if (((buses >> 8) & 0xff) != bus->busn_res.start) {
buses = (buses & 0xff000000)
@ -194,24 +218,11 @@ static void post_dock_fixups(acpi_handle not_used, u32 event, void *data)
| ((unsigned int)(bus->busn_res.end) << 16);
pci_write_config_dword(bus->self, PCI_PRIMARY_BUS, buses);
}
out:
acpiphp_let_context_go(context);
}
static void dock_event(acpi_handle handle, u32 type, void *data)
{
struct acpi_device *adev;
adev = acpi_bus_get_acpi_device(handle);
if (adev) {
acpiphp_hotplug_event(adev, type);
acpi_bus_put_acpi_device(adev);
}
}
static const struct acpi_dock_ops acpiphp_dock_ops = {
.fixup = post_dock_fixups,
.handler = dock_event,
};
/* Check whether the PCI device is managed by native PCIe hotplug driver */
static bool device_is_managed_by_native_pciehp(struct pci_dev *pdev)
{
@ -241,20 +252,6 @@ static bool device_is_managed_by_native_pciehp(struct pci_dev *pdev)
return true;
}
static void acpiphp_dock_init(void *data)
{
struct acpiphp_context *context = data;
get_bridge(context->func.parent);
}
static void acpiphp_dock_release(void *data)
{
struct acpiphp_context *context = data;
put_bridge(context->func.parent);
}
/**
* acpiphp_add_context - Add ACPIPHP context to an ACPI device object.
* @handle: ACPI handle of the object to add a context to.
@ -300,22 +297,18 @@ static acpi_status acpiphp_add_context(acpi_handle handle, u32 lvl, void *data,
newfunc = &context->func;
newfunc->function = function;
newfunc->parent = bridge;
acpi_unlock_hp_context();
if (acpi_has_method(handle, "_EJ0"))
/*
* If this is a dock device, its _EJ0 should be executed by the dock
* notify handler after calling _DCK.
*/
if (!is_dock_device(adev) && acpi_has_method(handle, "_EJ0"))
newfunc->flags = FUNC_HAS_EJ0;
if (acpi_has_method(handle, "_STA"))
newfunc->flags |= FUNC_HAS_STA;
/*
* Dock stations' notify handler should be used for dock devices instead
* of the common one, so clear hp.event in their contexts.
*/
if (acpi_has_method(handle, "_DCK"))
context->hp.event = NULL;
acpi_unlock_hp_context();
/* search for objects that share the same slot */
list_for_each_entry(slot, &bridge->slots, node)
if (slot->device == device)
@ -341,7 +334,7 @@ static acpi_status acpiphp_add_context(acpi_handle handle, u32 lvl, void *data,
* by the native PCIe hotplug (PCIeHP), becuase that code is supposed to
* expose slots to user space in those cases.
*/
if ((acpi_pci_check_ejectable(pbus, handle) || is_dock_device(handle))
if ((acpi_pci_check_ejectable(pbus, handle) || is_dock_device(adev))
&& !(pdev && device_is_managed_by_native_pciehp(pdev))) {
unsigned long long sun;
int retval;
@ -376,18 +369,6 @@ static acpi_status acpiphp_add_context(acpi_handle handle, u32 lvl, void *data,
&val, 60*1000))
slot->flags |= SLOT_ENABLED;
if (is_dock_device(handle)) {
/* we don't want to call this device's _EJ0
* because we want the dock notify handler
* to call it after it calls _DCK
*/
newfunc->flags &= ~FUNC_HAS_EJ0;
if (register_hotplug_dock_device(handle,
&acpiphp_dock_ops, context,
acpiphp_dock_init, acpiphp_dock_release))
pr_debug("failed to register dock device\n");
}
return AE_OK;
}
@ -418,11 +399,9 @@ static void cleanup_bridge(struct acpiphp_bridge *bridge)
list_for_each_entry(func, &slot->funcs, sibling) {
struct acpi_device *adev = func_to_acpi_device(func);
if (is_dock_device(adev->handle))
unregister_hotplug_dock_device(adev->handle);
acpi_lock_hp_context();
adev->hp->event = NULL;
adev->hp->notify = NULL;
adev->hp->fixup = NULL;
acpi_unlock_hp_context();
}
slot->flags |= SLOT_IS_GOING_AWAY;
@ -851,23 +830,16 @@ static void hotplug_event(u32 type, struct acpiphp_context *context)
put_bridge(bridge);
}
static int acpiphp_hotplug_event(struct acpi_device *adev, u32 type)
static int acpiphp_hotplug_notify(struct acpi_device *adev, u32 type)
{
struct acpiphp_context *context;
acpi_lock_hp_context();
context = acpiphp_get_context(adev);
if (!context || context->func.parent->is_going_away) {
acpi_unlock_hp_context();
context = acpiphp_grab_context(adev);
if (!context)
return -ENODATA;
}
get_bridge(context->func.parent);
acpiphp_put_context(context);
acpi_unlock_hp_context();
hotplug_event(type, context);
put_bridge(context->func.parent);
acpiphp_let_context_go(context);
return 0;
}

24
include/acpi/acpi_bus.h
View File

@ -143,7 +143,9 @@ struct acpi_scan_handler {
struct acpi_hotplug_context {
struct acpi_device *self;
int (*event)(struct acpi_device *, u32);
int (*notify)(struct acpi_device *, u32);
void (*uevent)(struct acpi_device *, u32);
void (*fixup)(struct acpi_device *);
};
/*
@ -201,7 +203,8 @@ struct acpi_device_flags {
u32 visited:1;
u32 no_hotplug:1;
u32 hotplug_notify:1;
u32 reserved:23;
u32 is_dock_station:1;
u32 reserved:22;
};
/* File System */
@ -365,13 +368,22 @@ static inline void acpi_set_device_status(struct acpi_device *adev, u32 sta)
static inline void acpi_set_hp_context(struct acpi_device *adev,
struct acpi_hotplug_context *hp,
int (*event)(struct acpi_device *, u32))
int (*notify)(struct acpi_device *, u32),
void (*uevent)(struct acpi_device *, u32),
void (*fixup)(struct acpi_device *))
{
hp->self = adev;
hp->event = event;
hp->notify = notify;
hp->uevent = uevent;
hp->fixup = fixup;
adev->hp = hp;
}
void acpi_initialize_hp_context(struct acpi_device *adev,
struct acpi_hotplug_context *hp,
int (*notify)(struct acpi_device *, u32),
void (*uevent)(struct acpi_device *, u32));
/* acpi_device.dev.bus == &acpi_bus_type */
extern struct bus_type acpi_bus_type;
@ -443,10 +455,6 @@ static inline bool acpi_device_enumerated(struct acpi_device *adev)
return adev && adev->flags.initialized && adev->flags.visited;
}
typedef void (*acpi_hp_callback)(void *data, u32 src);
acpi_status acpi_hotplug_execute(acpi_hp_callback func, void *data, u32 src);
/**
* module_acpi_driver(acpi_driver) - Helper macro for registering an ACPI driver
* @__acpi_driver: acpi_driver struct

26
include/acpi/acpi_drivers.h
View File

@ -109,36 +109,14 @@ void pci_acpi_crs_quirks(void);
/*--------------------------------------------------------------------------
Dock Station
-------------------------------------------------------------------------- */
struct acpi_dock_ops {
acpi_notify_handler fixup;
acpi_notify_handler handler;
acpi_notify_handler uevent;
};
#ifdef CONFIG_ACPI_DOCK
extern int is_dock_device(acpi_handle handle);
extern int register_hotplug_dock_device(acpi_handle handle,
const struct acpi_dock_ops *ops,
void *context,
void (*init)(void *),
void (*release)(void *));
extern void unregister_hotplug_dock_device(acpi_handle handle);
extern int is_dock_device(struct acpi_device *adev);
#else
static inline int is_dock_device(acpi_handle handle)
static inline int is_dock_device(struct acpi_device *adev)
{
return 0;
}
static inline int register_hotplug_dock_device(acpi_handle handle,
const struct acpi_dock_ops *ops,
void *context,
void (*init)(void *),
void (*release)(void *))
{
return -ENODEV;
}
static inline void unregister_hotplug_dock_device(acpi_handle handle)
{
}
#endif /* CONFIG_ACPI_DOCK */
#endif /*__ACPI_DRIVERS_H__*/