static LIST_HEAD(acpi_scan_handlers_list);
DEFINE_MUTEX(acpi_device_lock);
LIST_HEAD(acpi_wakeup_device_list);
+ static DEFINE_MUTEX(acpi_hp_context_lock);
struct acpi_device_bus_id{
char bus_id[15];
}
EXPORT_SYMBOL_GPL(acpi_scan_lock_release);
+ void acpi_lock_hp_context(void)
+ {
+ mutex_lock(&acpi_hp_context_lock);
+ }
+
+ void acpi_unlock_hp_context(void)
+ {
+ mutex_unlock(&acpi_hp_context_lock);
+ }
+
int acpi_scan_add_handler(struct acpi_scan_handler *handler)
{
if (!handler || !handler->attach)
return 0;
}
- static void acpi_device_hotplug(void *data, u32 src)
+ static int acpi_generic_hotplug_event(struct acpi_device *adev, u32 type)
+ {
+ switch (type) {
+ case ACPI_NOTIFY_BUS_CHECK:
+ return acpi_scan_bus_check(adev);
+ case ACPI_NOTIFY_DEVICE_CHECK:
+ return acpi_scan_device_check(adev);
+ case ACPI_NOTIFY_EJECT_REQUEST:
+ case ACPI_OST_EC_OSPM_EJECT:
+ if (adev->handler && !adev->handler->hotplug.enabled) {
+ dev_info(&adev->dev, "Eject disabled\n");
+ return -EPERM;
+ }
+ acpi_evaluate_hotplug_ost(adev->handle, ACPI_NOTIFY_EJECT_REQUEST,
+ ACPI_OST_SC_EJECT_IN_PROGRESS, NULL);
+ return acpi_scan_hot_remove(adev);
+ }
+ return -EINVAL;
+ }
+
+ void acpi_device_hotplug(void *data, u32 src)
{
u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE;
struct acpi_device *adev = data;
- int error;
+ int error = -ENODEV;
lock_device_hotplug();
mutex_lock(&acpi_scan_lock);
/*
* The device object's ACPI handle cannot become invalid as long as we
- * are holding acpi_scan_lock, but it may have become invalid before
+ * are holding acpi_scan_lock, but it might have become invalid before
* that lock was acquired.
*/
if (adev->handle == INVALID_ACPI_HANDLE)
- goto out;
-
- switch (src) {
- case ACPI_NOTIFY_BUS_CHECK:
- error = acpi_scan_bus_check(adev);
- break;
- case ACPI_NOTIFY_DEVICE_CHECK:
- error = acpi_scan_device_check(adev);
- break;
- case ACPI_NOTIFY_EJECT_REQUEST:
- case ACPI_OST_EC_OSPM_EJECT:
- error = acpi_scan_hot_remove(adev);
- break;
- default:
- error = -EINVAL;
- break;
- }
- if (!error)
- ost_code = ACPI_OST_SC_SUCCESS;
-
- out:
- acpi_evaluate_hotplug_ost(adev->handle, src, ost_code, NULL);
- put_device(&adev->dev);
- mutex_unlock(&acpi_scan_lock);
- unlock_device_hotplug();
- }
-
- static void acpi_hotplug_notify_cb(acpi_handle handle, u32 type, void *data)
- {
- u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE;
- struct acpi_device *adev;
- acpi_status status;
-
- if (acpi_bus_get_device(handle, &adev))
goto err_out;
- switch (type) {
- case ACPI_NOTIFY_BUS_CHECK:
- acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n");
- break;
- case ACPI_NOTIFY_DEVICE_CHECK:
- acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n");
- break;
- case ACPI_NOTIFY_EJECT_REQUEST:
- acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n");
- if (!adev->handler)
- goto err_out;
-
- if (!adev->handler->hotplug.enabled) {
- acpi_handle_err(handle, "Eject disabled\n");
+ 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;
}
- acpi_evaluate_hotplug_ost(handle, ACPI_NOTIFY_EJECT_REQUEST,
- ACPI_OST_SC_EJECT_IN_PROGRESS, NULL);
- break;
- default:
- /* non-hotplug event; possibly handled by other handler */
- return;
- }
- get_device(&adev->dev);
- status = acpi_hotplug_execute(acpi_device_hotplug, adev, type);
- if (ACPI_SUCCESS(status))
- return;
+ } else {
+ int (*event)(struct acpi_device *, u32);
- put_device(&adev->dev);
+ acpi_lock_hp_context();
+ event = adev->hp ? adev->hp->event : 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);
+ else
+ goto out;
+ }
+ if (!error)
+ ost_code = ACPI_OST_SC_SUCCESS;
err_out:
- acpi_evaluate_hotplug_ost(handle, type, ost_code, NULL);
+ acpi_evaluate_hotplug_ost(adev->handle, src, ost_code, NULL);
+
+ out:
+ acpi_bus_put_acpi_device(adev);
+ mutex_unlock(&acpi_scan_lock);
+ unlock_device_hotplug();
}
static ssize_t real_power_state_show(struct device *dev,
if (ACPI_FAILURE(status) || !acpi_device->flags.ejectable)
return -ENODEV;
- acpi_evaluate_hotplug_ost(acpi_device->handle, ACPI_OST_EC_OSPM_EJECT,
- ACPI_OST_SC_EJECT_IN_PROGRESS, NULL);
get_device(&acpi_device->dev);
status = acpi_hotplug_execute(acpi_device_hotplug, acpi_device,
ACPI_OST_EC_OSPM_EJECT);
mutex_unlock(&acpi_device_del_lock);
}
- int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device)
+ static int acpi_get_device_data(acpi_handle handle, struct acpi_device **device,
+ void (*callback)(void *))
{
acpi_status status;
if (!device)
return -EINVAL;
- status = acpi_get_data(handle, acpi_scan_drop_device, (void **)device);
+ status = acpi_get_data_full(handle, acpi_scan_drop_device,
+ (void **)device, callback);
if (ACPI_FAILURE(status) || !*device) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
handle));
}
return 0;
}
+
+ int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device)
+ {
+ return acpi_get_device_data(handle, device, NULL);
+ }
EXPORT_SYMBOL(acpi_bus_get_device);
+ static void get_acpi_device(void *dev)
+ {
+ if (dev)
+ get_device(&((struct acpi_device *)dev)->dev);
+ }
+
+ struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle)
+ {
+ struct acpi_device *adev = NULL;
+
+ acpi_get_device_data(handle, &adev, get_acpi_device);
+ return adev;
+ }
+
+ void acpi_bus_put_acpi_device(struct acpi_device *adev)
+ {
+ put_device(&adev->dev);
+ }
+
int acpi_device_add(struct acpi_device *device,
void (*release)(struct device *))
{
return false;
}
+static bool acpi_object_is_system_bus(acpi_handle handle)
+{
+ acpi_handle tmp;
+
+ if (ACPI_SUCCESS(acpi_get_handle(NULL, "\\_SB", &tmp)) &&
+ tmp == handle)
+ return true;
+ if (ACPI_SUCCESS(acpi_get_handle(NULL, "\\_TZ", &tmp)) &&
+ tmp == handle)
+ return true;
+
+ return false;
+}
+
static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp,
int device_type)
{
acpi_add_id(pnp, ACPI_DOCK_HID);
else if (acpi_ibm_smbus_match(handle))
acpi_add_id(pnp, ACPI_SMBUS_IBM_HID);
- else if (list_empty(&pnp->ids) && handle == ACPI_ROOT_OBJECT) {
- acpi_add_id(pnp, ACPI_BUS_HID); /* \_SB, LNXSYBUS */
+ else if (list_empty(&pnp->ids) &&
+ acpi_object_is_system_bus(handle)) {
+ /* \_SB, \_TZ, LNXSYBUS */
+ acpi_add_id(pnp, ACPI_BUS_HID);
strcpy(pnp->device_name, ACPI_BUS_DEVICE_NAME);
strcpy(pnp->device_class, ACPI_BUS_CLASS);
}
mutex_unlock(&acpi_scan_lock);
}
- static void acpi_scan_init_hotplug(acpi_handle handle, int type)
+ static void acpi_scan_init_hotplug(struct acpi_device *adev)
{
- struct acpi_device_pnp pnp = {};
struct acpi_hardware_id *hwid;
- struct acpi_scan_handler *handler;
-
- INIT_LIST_HEAD(&pnp.ids);
- acpi_set_pnp_ids(handle, &pnp, type);
- if (!pnp.type.hardware_id)
- goto out;
+ list_for_each_entry(hwid, &adev->pnp.ids, list) {
+ struct acpi_scan_handler *handler;
- /*
- * This relies on the fact that acpi_install_notify_handler() will not
- * install the same notify handler routine twice for the same handle.
- */
- list_for_each_entry(hwid, &pnp.ids, list) {
handler = acpi_scan_match_handler(hwid->id, NULL);
if (handler) {
- acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
- acpi_hotplug_notify_cb, handler);
+ adev->flags.hotplug_notify = true;
break;
}
}
-
- out:
- acpi_free_pnp_ids(&pnp);
}
static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used,
return AE_OK;
}
- acpi_scan_init_hotplug(handle, type);
-
acpi_add_single_object(&device, handle, type, sta);
if (!device)
return AE_CTRL_DEPTH;
+ acpi_scan_init_hotplug(device);
+
out:
if (!*return_value)
*return_value = device;
struct acpi_object_list *arguments,
struct acpi_handle_list *list);
acpi_status
+acpi_evaluate_ost(acpi_handle handle, u32 source_event, u32 status_code,
+ struct acpi_buffer *status_buf);
+#ifdef ACPI_HOTPLUG_OST
+#define acpi_evaluate_hotplug_ost acpi_evaluate_ost
+#else
+static inline acpi_status
acpi_evaluate_hotplug_ost(acpi_handle handle, u32 source_event,
- u32 status_code, struct acpi_buffer *status_buf);
+ u32 status_code, struct acpi_buffer *status_buf)
+{ return AE_OK; }
+#endif
acpi_status
acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld_info **pld);
struct acpi_hotplug_profile hotplug;
};
+ /*
+ * ACPI Hotplug Context
+ * --------------------
+ */
+
+ struct acpi_hotplug_context {
+ struct acpi_device *self;
+ int (*event)(struct acpi_device *, u32);
+ };
+
/*
* ACPI Driver
* -----------
u32 initialized:1;
u32 visited:1;
u32 no_hotplug:1;
- u32 reserved:24;
+ u32 hotplug_notify:1;
+ u32 reserved:23;
};
/* File System */
struct acpi_device_perf performance;
struct acpi_device_dir dir;
struct acpi_scan_handler *handler;
+ struct acpi_hotplug_context *hp;
struct acpi_driver *driver;
void *driver_data;
struct device dev;
*((u32 *)&adev->status) = sta;
}
+ static inline void acpi_set_hp_context(struct acpi_device *adev,
+ struct acpi_hotplug_context *hp,
+ int (*event)(struct acpi_device *, u32))
+ {
+ hp->self = adev;
+ hp->event = event;
+ adev->hp = hp;
+ }
+
/* acpi_device.dev.bus == &acpi_bus_type */
extern struct bus_type acpi_bus_type;
*/
int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device);
+ struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle);
+ void acpi_bus_put_acpi_device(struct acpi_device *adev);
acpi_status acpi_bus_get_status_handle(acpi_handle handle,
unsigned long long *sta);
int acpi_bus_get_status(struct acpi_device *device);
void acpi_scan_lock_acquire(void);
void acpi_scan_lock_release(void);
+ void acpi_lock_hp_context(void);
+ void acpi_unlock_hp_context(void);
int acpi_scan_add_handler(struct acpi_scan_handler *handler);
int acpi_bus_register_driver(struct acpi_driver *driver);
void acpi_bus_unregister_driver(struct acpi_driver *driver);
projects / karo-tx-linux.git / commitdiff