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/* $Id$ */
/** @file
* VBoxUsbDev.h - USB device.
*/
/*
* Copyright (C) 2011-2017 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* 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.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
#ifndef ___VBoxUsbDev_h___
#define ___VBoxUsbDev_h___
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
#include "VBoxUsbCmn.h"
#include <VBox/cdefs.h>
#include <iprt/assert.h>
typedef struct VBOXUSB_GLOBALS
{
PDRIVER_OBJECT pDrvObj;
UNICODE_STRING RegPath;
VBOXUSBRT_IDC RtIdc;
} VBOXUSB_GLOBALS, *PVBOXUSB_GLOBALS;
extern VBOXUSB_GLOBALS g_VBoxUsbGlobals;
/* pnp state decls */
typedef enum
{
ENMVBOXUSB_PNPSTATE_UNKNOWN = 0,
ENMVBOXUSB_PNPSTATE_START_PENDING,
ENMVBOXUSB_PNPSTATE_STARTED,
ENMVBOXUSB_PNPSTATE_STOP_PENDING,
ENMVBOXUSB_PNPSTATE_STOPPED,
ENMVBOXUSB_PNPSTATE_SURPRISE_REMOVED,
ENMVBOXUSB_PNPSTATE_REMOVE_PENDING,
ENMVBOXUSB_PNPSTATE_REMOVED,
ENMVBOXUSB_PNPSTATE_FORSEDWORD = 0x8fffffff
} ENMVBOXUSB_PNPSTATE;
AssertCompile(sizeof (ENMVBOXUSB_PNPSTATE) == sizeof (uint32_t));
#ifdef VBOX_STRICT
DECLHIDDEN(VOID) vboxUsbPnPStateGbgChange(ENMVBOXUSB_PNPSTATE enmOld, ENMVBOXUSB_PNPSTATE enmNew);
# define VBOXUSB_PNP_GBG_STATE_CHANGE(_old, _new) vboxUsbPnPStateGbgChange((_old), (_new))
#else
# define VBOXUSB_PNP_GBG_STATE_CHANGE(_old, _new) do { } while (0)
#endif
typedef struct VBOXUSB_PNPSTATE
{
/* Current state */
volatile ENMVBOXUSB_PNPSTATE Curr;
/* Previous state, used to restore state info on cancell stop device */
ENMVBOXUSB_PNPSTATE Prev;
} VBOXUSB_PNPSTATE, *PVBOXUSB_PNPSTATE;
typedef struct VBOXUSBDEV_DDISTATE
{
/* Lock */
KSPIN_LOCK Lock;
VBOXDRVTOOL_REF Ref;
VBOXUSB_PNPSTATE PnPState;
VBOXUSB_PWRSTATE PwrState;
/* current dev caps */
DEVICE_CAPABILITIES DevCaps;
} VBOXUSBDEV_DDISTATE, *PVBOXUSBDEV_DDISTATE;
typedef struct VBOXUSBDEV_EXT
{
PDEVICE_OBJECT pFDO;
PDEVICE_OBJECT pPDO;
PDEVICE_OBJECT pLowerDO;
VBOXUSBDEV_DDISTATE DdiState;
uint32_t cHandles;
VBOXUSB_RT Rt;
} VBOXUSBDEV_EXT, *PVBOXUSBDEV_EXT;
/* pnp state api */
DECLINLINE(ENMVBOXUSB_PNPSTATE) vboxUsbPnPStateGet(PVBOXUSBDEV_EXT pDevExt)
{
return (ENMVBOXUSB_PNPSTATE)ASMAtomicUoReadU32((volatile uint32_t*)&pDevExt->DdiState.PnPState.Curr);
}
DECLINLINE(ENMVBOXUSB_PNPSTATE) vboxUsbPnPStateSet(PVBOXUSBDEV_EXT pDevExt, ENMVBOXUSB_PNPSTATE enmState)
{
KIRQL Irql;
ENMVBOXUSB_PNPSTATE enmOldState;
KeAcquireSpinLock(&pDevExt->DdiState.Lock, &Irql);
pDevExt->DdiState.PnPState.Prev = (ENMVBOXUSB_PNPSTATE)ASMAtomicUoReadU32((volatile uint32_t*)&pDevExt->DdiState.PnPState.Curr);
ASMAtomicWriteU32((volatile uint32_t*)&pDevExt->DdiState.PnPState.Curr, (uint32_t)enmState);
pDevExt->DdiState.PnPState.Curr = enmState;
enmOldState = pDevExt->DdiState.PnPState.Prev;
KeReleaseSpinLock(&pDevExt->DdiState.Lock, Irql);
VBOXUSB_PNP_GBG_STATE_CHANGE(enmOldState, enmState);
return enmState;
}
DECLINLINE(ENMVBOXUSB_PNPSTATE) vboxUsbPnPStateRestore(PVBOXUSBDEV_EXT pDevExt)
{
ENMVBOXUSB_PNPSTATE enmNewState, enmOldState;
KIRQL Irql;
KeAcquireSpinLock(&pDevExt->DdiState.Lock, &Irql);
enmOldState = pDevExt->DdiState.PnPState.Curr;
enmNewState = pDevExt->DdiState.PnPState.Prev;
ASMAtomicWriteU32((volatile uint32_t*)&pDevExt->DdiState.PnPState.Curr, (uint32_t)pDevExt->DdiState.PnPState.Prev);
KeReleaseSpinLock(&pDevExt->DdiState.Lock, Irql);
VBOXUSB_PNP_GBG_STATE_CHANGE(enmOldState, enmNewState);
Assert(enmNewState == ENMVBOXUSB_PNPSTATE_STARTED);
Assert(enmOldState == ENMVBOXUSB_PNPSTATE_STOP_PENDING
|| enmOldState == ENMVBOXUSB_PNPSTATE_REMOVE_PENDING);
return enmNewState;
}
DECLINLINE(VOID) vboxUsbPnPStateInit(PVBOXUSBDEV_EXT pDevExt)
{
pDevExt->DdiState.PnPState.Curr = pDevExt->DdiState.PnPState.Prev = ENMVBOXUSB_PNPSTATE_START_PENDING;
}
DECLINLINE(VOID) vboxUsbDdiStateInit(PVBOXUSBDEV_EXT pDevExt)
{
KeInitializeSpinLock(&pDevExt->DdiState.Lock);
VBoxDrvToolRefInit(&pDevExt->DdiState.Ref);
vboxUsbPwrStateInit(pDevExt);
vboxUsbPnPStateInit(pDevExt);
}
DECLINLINE(bool) vboxUsbDdiStateRetainIfStarted(PVBOXUSBDEV_EXT pDevExt)
{
KIRQL oldIrql;
bool bRetained = true;
KeAcquireSpinLock(&pDevExt->DdiState.Lock, &oldIrql);
if (vboxUsbPnPStateGet(pDevExt) == ENMVBOXUSB_PNPSTATE_STARTED)
{
VBoxDrvToolRefRetain(&pDevExt->DdiState.Ref);
}
else
{
bRetained = false;
}
KeReleaseSpinLock(&pDevExt->DdiState.Lock, oldIrql);
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
* */
DECLINLINE(ENMVBOXUSB_PNPSTATE) vboxUsbDdiStateRetainIfNotRemoved(PVBOXUSBDEV_EXT pDevExt)
{
KIRQL oldIrql;
ENMVBOXUSB_PNPSTATE enmState;
KeAcquireSpinLock(&pDevExt->DdiState.Lock, &oldIrql);
enmState = vboxUsbPnPStateGet(pDevExt);
if (enmState != ENMVBOXUSB_PNPSTATE_REMOVED)
{
VBoxDrvToolRefRetain(&pDevExt->DdiState.Ref);
}
KeReleaseSpinLock(&pDevExt->DdiState.Lock, oldIrql);
return enmState != ENMVBOXUSB_PNPSTATE_REMOVED ? enmState : (ENMVBOXUSB_PNPSTATE)0;
}
DECLINLINE(uint32_t) vboxUsbDdiStateRetain(PVBOXUSBDEV_EXT pDevExt)
{
return VBoxDrvToolRefRetain(&pDevExt->DdiState.Ref);
}
DECLINLINE(uint32_t) vboxUsbDdiStateRelease(PVBOXUSBDEV_EXT pDevExt)
{
return VBoxDrvToolRefRelease(&pDevExt->DdiState.Ref);
}
DECLINLINE(VOID) vboxUsbDdiStateReleaseAndWaitCompleted(PVBOXUSBDEV_EXT pDevExt)
{
VBoxDrvToolRefRelease(&pDevExt->DdiState.Ref);
VBoxDrvToolRefWaitEqual(&pDevExt->DdiState.Ref, 1);
}
DECLINLINE(VOID) vboxUsbDdiStateReleaseAndWaitRemoved(PVBOXUSBDEV_EXT pDevExt)
{
VBoxDrvToolRefRelease(&pDevExt->DdiState.Ref);
VBoxDrvToolRefWaitEqual(&pDevExt->DdiState.Ref, 0);
}
#endif /* #ifndef ___VBoxUsbDev_h___ */
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