include/hw/hotplug.h

   1 /*
   2  * Hotplug handler interface.
   3  *
   4  * Copyright (c) 2014 Red Hat Inc.
   5  *
   6  * Authors:
   7  *  Igor Mammedov <imammedo@redhat.com>,
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  10  * See the COPYING file in the top-level directory.
  11  */
  12 #ifndef HOTPLUG_H
  13 #define HOTPLUG_H
  14
  15 #include "qom/object.h"
  16 #include "qemu/typedefs.h"
  17
  18 #define TYPE_HOTPLUG_HANDLER "hotplug-handler"
  19
  20 #define HOTPLUG_HANDLER_CLASS(klass) \
  21      OBJECT_CLASS_CHECK(HotplugHandlerClass, (klass), TYPE_HOTPLUG_HANDLER)
  22 #define HOTPLUG_HANDLER_GET_CLASS(obj) \
  23      OBJECT_GET_CLASS(HotplugHandlerClass, (obj), TYPE_HOTPLUG_HANDLER)
  24 #define HOTPLUG_HANDLER(obj) \
  25      INTERFACE_CHECK(HotplugHandler, (obj), TYPE_HOTPLUG_HANDLER)
  26
  27
  28 typedef struct HotplugHandler {
  29     /* <private> */
  30     Object Parent;
  31 } HotplugHandler;
  32
  33 /**
  34  * hotplug_fn:
  35  * @plug_handler: a device performing plug/uplug action
  36  * @plugged_dev: a device that has been (un)plugged
  37  * @errp: returns an error if this function fails
  38  */
  39 typedef void (*hotplug_fn)(HotplugHandler *plug_handler,
  40                            DeviceState *plugged_dev, Error **errp);
  41
  42 /**
  43  * HotplugDeviceClass:
  44  *
  45  * Interface to be implemented by a device performing
  46  * hardware (un)plug functions.
  47  *
  48  * @parent: Opaque parent interface.
  49  * @plug: plug callback.
  50  * @unplug_request: unplug request callback.
  51  *                  Used as a means to initiate device unplug for devices that
  52  *                  require asynchronous unplug handling.
  53  * @unplug: unplug callback.
  54  *          Used for device removal with devices that implement
  55  *          asynchronous and synchronous (surprise) removal.
  56  */
  57 typedef struct HotplugHandlerClass {
  58     /* <private> */
  59     InterfaceClass parent;
  60
  61     /* <public> */
  62     hotplug_fn plug;
  63     hotplug_fn unplug_request;
  64     hotplug_fn unplug;
  65 } HotplugHandlerClass;
  66
  67 /**
  68  * hotplug_handler_plug:
  69  *
  70  * Call #HotplugHandlerClass.plug callback of @plug_handler.
  71  */
  72 void hotplug_handler_plug(HotplugHandler *plug_handler,
  73                           DeviceState *plugged_dev,
  74                           Error **errp);
  75
  76 /**
  77  * hotplug_handler_unplug_request:
  78  *
  79  * Calls #HotplugHandlerClass.unplug_request callback of @plug_handler.
  80  */
  81 void hotplug_handler_unplug_request(HotplugHandler *plug_handler,
  82                                     DeviceState *plugged_dev,
  83                                     Error **errp);
  84 /**
  85  * hotplug_handler_unplug:
  86  *
  87  * Calls #HotplugHandlerClass.unplug callback of @plug_handler.
  88  */
  89 void hotplug_handler_unplug(HotplugHandler *plug_handler,
  90                             DeviceState *plugged_dev,
  91                             Error **errp);
  92 #endif