OvmfPkg/Include/IndustryStandard/Xen/io/xenbus.h

   1 /*****************************************************************************
   2  * xenbus.h
   3  *
   4  * Xenbus protocol details.
   5  *
   6  * SPDX-License-Identifier: MIT
   7  *
   8  * Copyright (C) 2005 XenSource Ltd.
   9  */
  10
  11 #ifndef _XEN_PUBLIC_IO_XENBUS_H
  12 #define _XEN_PUBLIC_IO_XENBUS_H
  13
  14 /*
  15  * The state of either end of the Xenbus, i.e. the current communication
  16  * status of initialisation across the bus.  States here imply nothing about
  17  * the state of the connection between the driver and the kernel's device
  18  * layers.
  19  */
  20 enum xenbus_state {
  21   XenbusStateUnknown = 0,
  22
  23   XenbusStateInitialising = 1,
  24
  25   /*
  26    * InitWait: Finished early initialisation but waiting for information
  27    * from the peer or hotplug scripts.
  28    */
  29   XenbusStateInitWait = 2,
  30
  31   /*
  32    * Initialised: Waiting for a connection from the peer.
  33    */
  34   XenbusStateInitialised = 3,
  35
  36   XenbusStateConnected = 4,
  37
  38   /*
  39    * Closing: The device is being closed due to an error or an unplug event.
  40    */
  41   XenbusStateClosing = 5,
  42
  43   XenbusStateClosed = 6,
  44
  45   /*
  46    * Reconfiguring: The device is being reconfigured.
  47    */
  48   XenbusStateReconfiguring = 7,
  49
  50   XenbusStateReconfigured = 8
  51 };
  52
  53 typedef enum xenbus_state XenbusState;
  54
  55 #endif /* _XEN_PUBLIC_IO_XENBUS_H */
  56
  57 /*
  58  * Local variables:
  59  * mode: C
  60  * c-file-style: "BSD"
  61  * c-basic-offset: 4
  62  * tab-width: 4
  63  * indent-tabs-mode: nil
  64  * End:
  65  */