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
  17 #define TYPE_HOTPLUG_HANDLER "hotplug-handler"
  18
  19 #define HOTPLUG_HANDLER_CLASS(klass) \
  20      OBJECT_CLASS_CHECK(HotplugHandlerClass, (klass), TYPE_HOTPLUG_HANDLER)
  21 #define HOTPLUG_HANDLER_GET_CLASS(obj) \
  22      OBJECT_GET_CLASS(HotplugHandlerClass, (obj), TYPE_HOTPLUG_HANDLER)
  23 #define HOTPLUG_HANDLER(obj) \
  24      INTERFACE_CHECK(HotplugHandler, (obj), TYPE_HOTPLUG_HANDLER)
  25
  26
  27 typedef struct HotplugHandler {
  28     /* <private> */
  29     Object Parent;
  30 } HotplugHandler;
  31
  32 /**
  33  * hotplug_fn:
  34  * @plug_handler: a device performing plug/uplug action
  35  * @plugged_dev: a device that has been (un)plugged
  36  * @errp: returns an error if this function fails
  37  */
  38 typedef void (*hotplug_fn)(HotplugHandler *plug_handler,
  39                            DeviceState *plugged_dev, Error **errp);
  40
  41 /**
  42  * HotplugDeviceClass:
  43  *
  44  * Interface to be implemented by a device performing
  45  * hardware (un)plug functions.
  46  *
  47  * @parent: Opaque parent interface.
  48  * @pre_plug: pre plug callback called at start of device.realize(true)
  49  * @plug: plug callback called at end of device.realize(true).
  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 pre_plug;
  63     hotplug_fn plug;
  64     hotplug_fn unplug_request;
  65     hotplug_fn unplug;
  66 } HotplugHandlerClass;
  67
  68 /**
  69  * hotplug_handler_plug:
  70  *
  71  * Call #HotplugHandlerClass.plug callback of @plug_handler.
  72  */
  73 void hotplug_handler_plug(HotplugHandler *plug_handler,
  74                           DeviceState *plugged_dev,
  75                           Error **errp);
  76
  77 /**
  78  * hotplug_handler_pre_plug:
  79  *
  80  * Call #HotplugHandlerClass.pre_plug callback of @plug_handler.
  81  */
  82 void hotplug_handler_pre_plug(HotplugHandler *plug_handler,
  83                               DeviceState *plugged_dev,
  84                               Error **errp);
  85
  86 /**
  87  * hotplug_handler_unplug_request:
  88  *
  89  * Calls #HotplugHandlerClass.unplug_request callback of @plug_handler.
  90  */
  91 void hotplug_handler_unplug_request(HotplugHandler *plug_handler,
  92                                     DeviceState *plugged_dev,
  93                                     Error **errp);
  94 /**
  95  * hotplug_handler_unplug:
  96  *
  97  * Calls #HotplugHandlerClass.unplug callback of @plug_handler.
  98  */
  99 void hotplug_handler_unplug(HotplugHandler *plug_handler,
 100                             DeviceState *plugged_dev,
 101                             Error **errp);
 102 #endif