VBoxUsbDev.h revision c7814cf6e1240a519cbec0441e033d0e2470ed00
/* $Id$ */
/** @file
* VBoxUsbDev.h - USB device.
*/
/*
* Copyright (C) 2011-2012 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*/
#ifndef ___VBoxUsbDev_h___
#define ___VBoxUsbDev_h___
#include "VBoxUsbCmn.h"
typedef struct VBOXUSB_GLOBALS
{
extern VBOXUSB_GLOBALS g_VBoxUsbGlobals;
/* pnp state decls */
typedef enum
{
ENMVBOXUSB_PNPSTATE_FORSEDWORD = 0x8fffffff
#ifdef DEBUG
#else
#endif
typedef struct VBOXUSB_PNPSTATE
{
/* Current state */
volatile ENMVBOXUSB_PNPSTATE Curr;
/* Previous state, used to restore state info on cancell stop device */
typedef struct VBOXUSBDEV_DDISTATE
{
/* Lock */
/* current dev caps */
typedef struct VBOXUSBDEV_EXT
{
/* pnp state api */
{
return (ENMVBOXUSB_PNPSTATE)ASMAtomicUoReadU32((volatile uint32_t*)&pDevExt->DdiState.PnPState.Curr);
}
static DECLINLINE(ENMVBOXUSB_PNPSTATE) vboxUsbPnPStateSet(PVBOXUSBDEV_EXT pDevExt, ENMVBOXUSB_PNPSTATE enmState)
{
pDevExt->DdiState.PnPState.Prev = (ENMVBOXUSB_PNPSTATE)ASMAtomicUoReadU32((volatile uint32_t*)&pDevExt->DdiState.PnPState.Curr);
return enmState;
}
{
ASMAtomicWriteU32((volatile uint32_t*)&pDevExt->DdiState.PnPState.Curr, (uint32_t)pDevExt->DdiState.PnPState.Prev);
return enmNewState;
}
{
pDevExt->DdiState.PnPState.Curr = pDevExt->DdiState.PnPState.Prev = ENMVBOXUSB_PNPSTATE_START_PENDING;
}
{
}
{
bool bRetained = true;
{
}
else
{
bRetained = false;
}
return bRetained;
}
/* if device is removed - does nothing and returns zero,
* otherwise increments a ref counter and returns the current pnp state
* NOTE: never returns ENMVBOXUSB_PNPSTATE_REMOVED
* */
{
if (enmState != ENMVBOXUSB_PNPSTATE_REMOVED)
{
}
}
{
}
{
}
{
}
{
}
{
/* Earlier we assumed that 1 request will be pending while we service
Device Power IRP which was leading to host hang when USB is connected
to VM.
With debugging found that at the point when host goes to sleep
state and USB is connected to VM, two Power IRP requests are pending :
One for SYSTEM and other for DEVICE.
*/
}
#endif /* #ifndef ___VBoxUsbDev_h___ */