Adding upstream version 6.0.4-dfsg.upstream/6.0.4-dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1320 insertions, 0 deletions

diff --git a/include/VBox/vusb.h b/include/VBox/vusb.h
new file mode 100644
index 00000000..7b3de0e9
--- /dev/null
+++ b/include/VBox/vusb.h
@@ -0,0 +1,1320 @@
+/** @file
+ * VUSB - VirtualBox USB. (DEV,VMM)
+ */
+
+/*
+ * Copyright (C) 2006-2019 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 VBOX_INCLUDED_vusb_h
+#define VBOX_INCLUDED_vusb_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include <VBox/cdefs.h>
+#include <VBox/types.h>
+#include <iprt/assert.h>
+
+struct PDMLED;
+
+RT_C_DECLS_BEGIN
+
+/** @defgroup grp_vusb  VBox USB API
+ * @{
+ */
+
+/** @defgroup grp_vusb_std  Standard Stuff
+ * @{ */
+
+/** Frequency of USB bus (from spec). */
+#define VUSB_BUS_HZ                 12000000
+
+
+/** @name USB Descriptor types (from spec)
+ * @{ */
+#define VUSB_DT_DEVICE                  0x01
+#define VUSB_DT_CONFIG                  0x02
+#define VUSB_DT_STRING                  0x03
+#define VUSB_DT_INTERFACE               0x04
+#define VUSB_DT_ENDPOINT                0x05
+#define VUSB_DT_DEVICE_QUALIFIER        0x06
+#define VUSB_DT_OTHER_SPEED_CFG         0x07
+#define VUSB_DT_INTERFACE_POWER         0x08
+#define VUSB_DT_INTERFACE_ASSOCIATION   0x0B
+#define VUSB_DT_BOS                     0x0F
+#define VUSB_DT_DEVICE_CAPABILITY       0x10
+#define VUSB_DT_SS_ENDPOINT_COMPANION   0x30
+/** @} */
+
+/** @name USB Descriptor minimum sizes (from spec)
+ * @{ */
+#define VUSB_DT_DEVICE_MIN_LEN          18
+#define VUSB_DT_CONFIG_MIN_LEN          9
+#define VUSB_DT_CONFIG_STRING_MIN_LEN   2
+#define VUSB_DT_INTERFACE_MIN_LEN       9
+#define VUSB_DT_ENDPOINT_MIN_LEN        7
+#define VUSB_DT_SSEP_COMPANION_MIN_LEN  6
+/** @} */
+
+/** @name USB Device Capability Type Codes (from spec)
+ * @{ */
+#define VUSB_DCT_WIRELESS_USB           0x01
+#define VUSB_DCT_USB_20_EXTENSION       0x02
+#define VUSB_DCT_SUPERSPEED_USB         0x03
+#define VUSB_DCT_CONTAINER_ID           0x04
+/** @} */
+
+
+#pragma pack(1) /* ensure byte packing of the descriptors. */
+
+/**
+ * USB language id descriptor (from specs).
+ */
+typedef struct VUSBDESCLANGID
+{
+    uint8_t bLength;
+    uint8_t bDescriptorType;
+} VUSBDESCLANGID;
+/** Pointer to a USB language id descriptor. */
+typedef VUSBDESCLANGID *PVUSBDESCLANGID;
+/** Pointer to a const USB language id descriptor. */
+typedef const VUSBDESCLANGID *PCVUSBDESCLANGID;
+
+
+/**
+ * USB string descriptor (from specs).
+ */
+typedef struct VUSBDESCSTRING
+{
+    uint8_t bLength;
+    uint8_t bDescriptorType;
+} VUSBDESCSTRING;
+/** Pointer to a USB string descriptor. */
+typedef VUSBDESCSTRING *PVUSBDESCSTRING;
+/** Pointer to a const USB string descriptor. */
+typedef const VUSBDESCSTRING *PCVUSBDESCSTRING;
+
+
+/**
+ * USB device descriptor (from spec)
+ */
+typedef struct VUSBDESCDEVICE
+{
+    uint8_t  bLength;
+    uint8_t  bDescriptorType;
+    uint16_t bcdUSB;
+    uint8_t  bDeviceClass;
+    uint8_t  bDeviceSubClass;
+    uint8_t  bDeviceProtocol;
+    uint8_t  bMaxPacketSize0;
+    uint16_t idVendor;
+    uint16_t idProduct;
+    uint16_t bcdDevice;
+    uint8_t  iManufacturer;
+    uint8_t  iProduct;
+    uint8_t  iSerialNumber;
+    uint8_t  bNumConfigurations;
+} VUSBDESCDEVICE;
+/** Pointer to a USB device descriptor. */
+typedef VUSBDESCDEVICE *PVUSBDESCDEVICE;
+/** Pointer to a const USB device descriptor. */
+typedef const VUSBDESCDEVICE *PCVUSBDESCDEVICE;
+
+/**
+ * USB device qualifier (from spec 9.6.2)
+ */
+struct VUSBDEVICEQUALIFIER
+{
+    uint8_t bLength;
+    uint8_t bDescriptorType;
+    uint16_t bcdUsb;
+    uint8_t bDeviceClass;
+    uint8_t bDeviceSubClass;
+    uint8_t bDeviceProtocol;
+    uint8_t bMaxPacketSize0;
+    uint8_t bNumConfigurations;
+    uint8_t bReserved;
+};
+
+typedef struct VUSBDEVICEQUALIFIER VUSBDEVICEQUALIFIER;
+typedef VUSBDEVICEQUALIFIER *PVUSBDEVICEQUALIFIER;
+
+
+/**
+ * USB configuration descriptor (from spec).
+ */
+typedef struct VUSBDESCCONFIG
+{
+    uint8_t  bLength;
+    uint8_t  bDescriptorType;
+    uint16_t wTotalLength; /**< recalculated by VUSB when involved in URB. */
+    uint8_t  bNumInterfaces;
+    uint8_t  bConfigurationValue;
+    uint8_t  iConfiguration;
+    uint8_t  bmAttributes;
+    uint8_t  MaxPower;
+} VUSBDESCCONFIG;
+/** Pointer to a USB configuration descriptor. */
+typedef VUSBDESCCONFIG *PVUSBDESCCONFIG;
+/** Pointer to a readonly USB configuration descriptor. */
+typedef const VUSBDESCCONFIG *PCVUSBDESCCONFIG;
+
+
+/**
+ * USB interface association descriptor (from USB ECN Interface Association Descriptors)
+ */
+typedef struct VUSBDESCIAD
+{
+    uint8_t bLength;
+    uint8_t bDescriptorType;
+    uint8_t bFirstInterface;
+    uint8_t bInterfaceCount;
+    uint8_t bFunctionClass;
+    uint8_t bFunctionSubClass;
+    uint8_t bFunctionProtocol;
+    uint8_t iFunction;
+} VUSBDESCIAD;
+/** Pointer to a USB interface association descriptor. */
+typedef VUSBDESCIAD *PVUSBDESCIAD;
+/** Pointer to a readonly USB interface association descriptor. */
+typedef const VUSBDESCIAD *PCVUSBDESCIAD;
+
+
+/**
+ * USB interface descriptor (from spec)
+ */
+typedef struct VUSBDESCINTERFACE
+{
+    uint8_t  bLength;
+    uint8_t  bDescriptorType;
+    uint8_t  bInterfaceNumber;
+    uint8_t  bAlternateSetting;
+    uint8_t  bNumEndpoints;
+    uint8_t  bInterfaceClass;
+    uint8_t  bInterfaceSubClass;
+    uint8_t  bInterfaceProtocol;
+    uint8_t  iInterface;
+} VUSBDESCINTERFACE;
+/** Pointer to a USB interface descriptor. */
+typedef VUSBDESCINTERFACE *PVUSBDESCINTERFACE;
+/** Pointer to a const USB interface descriptor. */
+typedef const VUSBDESCINTERFACE *PCVUSBDESCINTERFACE;
+
+
+/**
+ * USB endpoint descriptor (from spec)
+ */
+typedef struct VUSBDESCENDPOINT
+{
+    uint8_t  bLength;
+    uint8_t  bDescriptorType;
+    uint8_t  bEndpointAddress;
+    uint8_t  bmAttributes;
+    uint16_t wMaxPacketSize;
+    uint8_t  bInterval;
+} VUSBDESCENDPOINT;
+/** Pointer to a USB endpoint descriptor. */
+typedef VUSBDESCENDPOINT *PVUSBDESCENDPOINT;
+/** Pointer to a const USB endpoint descriptor. */
+typedef const VUSBDESCENDPOINT *PCVUSBDESCENDPOINT;
+
+
+/**
+ * USB SuperSpeed endpoint companion descriptor (from USB3 spec)
+ */
+typedef struct VUSBDESCSSEPCOMPANION
+{
+    uint8_t  bLength;
+    uint8_t  bDescriptorType;
+    uint8_t  bMaxBurst;
+    uint8_t  bmAttributes;
+    uint16_t wBytesPerInterval;
+} VUSBDESCSSEPCOMPANION;
+/** Pointer to a USB endpoint companion descriptor. */
+typedef VUSBDESCSSEPCOMPANION *PVUSBDESCSSEPCOMPANION;
+/** Pointer to a const USB endpoint companion descriptor. */
+typedef const VUSBDESCSSEPCOMPANION *PCVUSBDESCSSEPCOMPANION;
+
+
+/**
+ * USB Binary Device Object Store, aka BOS (from USB3 spec)
+ */
+typedef struct VUSBDESCBOS
+{
+    uint8_t  bLength;
+    uint8_t  bDescriptorType;
+    uint16_t wTotalLength;
+    uint8_t  bNumDeviceCaps;
+} VUSBDESCBOS;
+/** Pointer to a USB BOS descriptor. */
+typedef VUSBDESCBOS *PVUSBDESCBOS;
+/** Pointer to a const USB BOS descriptor. */
+typedef const VUSBDESCBOS *PCVUSBDESCBOS;
+
+
+/**
+ * Generic USB Device Capability Descriptor within BOS (from USB3 spec)
+ */
+typedef struct VUSBDESCDEVICECAP
+{
+    uint8_t  bLength;
+    uint8_t  bDescriptorType;
+    uint8_t  bDevCapabilityType;
+    uint8_t  aCapSpecific[1];
+} VUSBDESCDEVICECAP;
+/** Pointer to a USB device capability descriptor. */
+typedef VUSBDESCDEVICECAP *PVUSBDESCDEVICECAP;
+/** Pointer to a const USB device capability descriptor. */
+typedef const VUSBDESCDEVICECAP *PCVUSBDESCDEVICECAP;
+
+
+/**
+ * SuperSpeed USB Device Capability Descriptor within BOS
+ */
+typedef struct VUSBDESCSSDEVCAP
+{
+    uint8_t  bLength;
+    uint8_t  bDescriptorType;       /* DEVICE CAPABILITY */
+    uint8_t  bDevCapabilityType;    /* SUPERSPEED_USB */
+    uint8_t  bmAttributes;
+    uint16_t wSpeedsSupported;
+    uint8_t  bFunctionalitySupport;
+    uint8_t  bU1DevExitLat;
+    uint16_t wU2DevExitLat;
+} VUSBDESCSSDEVCAP;
+/** Pointer to an SS USB device capability descriptor. */
+typedef VUSBDESCSSDEVCAP *PVUSBDESCSSDEVCAP;
+/** Pointer to a const SS USB device capability descriptor. */
+typedef const VUSBDESCSSDEVCAP *PCVUSBDESCSSDEVCAP;
+
+
+/**
+ * USB 2.0 Extension Descriptor within BOS
+ */
+typedef struct VUSBDESCUSB2EXT
+{
+    uint8_t  bLength;
+    uint8_t  bDescriptorType;       /* DEVICE CAPABILITY */
+    uint8_t  bDevCapabilityType;    /* USB 2.0 EXTENSION */
+    uint8_t  bmAttributes;
+} VUSBDESCUSB2EXT;
+/** Pointer to a USB 2.0 extension capability descriptor. */
+typedef VUSBDESCUSB2EXT *PVUSBDESCUSB2EXT;
+/** Pointer to a const USB 2.0 extension capability descriptor. */
+typedef const VUSBDESCUSB2EXT *PCVUSBDESCUSB2EXT;
+
+
+#pragma pack() /* end of the byte packing. */
+
+
+/**
+ * USB configuration descriptor, the parsed variant used by VUSB.
+ */
+typedef struct VUSBDESCCONFIGEX
+{
+    /** The USB descriptor data.
+     * @remark  The wTotalLength member is recalculated before the data is passed to the guest. */
+    VUSBDESCCONFIG Core;
+    /** Pointer to additional descriptor bytes following what's covered by VUSBDESCCONFIG. */
+    void *pvMore;
+    /** Pointer to additional class- or vendor-specific interface descriptors. */
+    const void *pvClass;
+    /** Size of class- or vendor-specific descriptors. */
+    uint16_t cbClass;
+    /** Pointer to an array of the interfaces referenced in the configuration.
+     * Core.bNumInterfaces in size. */
+    const struct VUSBINTERFACE *paIfs;
+    /** Pointer to the original descriptor data read from the device. */
+    const void *pvOriginal;
+} VUSBDESCCONFIGEX;
+/** Pointer to a parsed USB configuration descriptor. */
+typedef VUSBDESCCONFIGEX *PVUSBDESCCONFIGEX;
+/** Pointer to a const parsed USB configuration descriptor. */
+typedef const VUSBDESCCONFIGEX *PCVUSBDESCCONFIGEX;
+
+
+/**
+ * For tracking the alternate interface settings of a configuration.
+ */
+typedef struct VUSBINTERFACE
+{
+    /** Pointer to an array of interfaces. */
+    const struct VUSBDESCINTERFACEEX *paSettings;
+    /** The number of entries in the array. */
+    uint32_t cSettings;
+} VUSBINTERFACE;
+/** Pointer to a VUSBINTERFACE. */
+typedef VUSBINTERFACE *PVUSBINTERFACE;
+/** Pointer to a const VUSBINTERFACE. */
+typedef const VUSBINTERFACE *PCVUSBINTERFACE;
+
+
+/**
+ * USB interface descriptor, the parsed variant used by VUSB.
+ */
+typedef struct VUSBDESCINTERFACEEX
+{
+    /** The USB descriptor data. */
+    VUSBDESCINTERFACE Core;
+    /** Pointer to additional descriptor bytes following what's covered by VUSBDESCINTERFACE. */
+    const void *pvMore;
+    /** Pointer to additional class- or vendor-specific interface descriptors. */
+    const void *pvClass;
+    /** Size of class- or vendor-specific descriptors. */
+    uint16_t cbClass;
+    /** Pointer to an array of the endpoints referenced by the interface.
+     * Core.bNumEndpoints in size. */
+    const struct VUSBDESCENDPOINTEX *paEndpoints;
+    /** Interface association descriptor, which prepends a group of interfaces,
+     * starting with this interface. */
+    PCVUSBDESCIAD pIAD;
+    /** Size of interface association descriptor. */
+    uint16_t cbIAD;
+} VUSBDESCINTERFACEEX;
+/** Pointer to an prased USB interface descriptor. */
+typedef VUSBDESCINTERFACEEX *PVUSBDESCINTERFACEEX;
+/** Pointer to a const parsed USB interface descriptor. */
+typedef const VUSBDESCINTERFACEEX *PCVUSBDESCINTERFACEEX;
+
+
+/**
+ * USB endpoint descriptor, the parsed variant used by VUSB.
+ */
+typedef struct VUSBDESCENDPOINTEX
+{
+    /** The USB descriptor data.
+     * @remark The wMaxPacketSize member is converted to native endian. */
+    VUSBDESCENDPOINT Core;
+    /** Pointer to additional descriptor bytes following what's covered by VUSBDESCENDPOINT. */
+    const void *pvMore;
+    /** Pointer to additional class- or vendor-specific endpoint descriptors. */
+    const void *pvClass;
+    /** Size of class- or vendor-specific descriptors. */
+    uint16_t cbClass;
+    /** Pointer to SuperSpeed endpoint companion descriptor (SS endpoints only). */
+    const void *pvSsepc;
+    /** Size of SuperSpeed endpoint companion descriptor.
+     * @remark Must be non-zero for SuperSpeed endpoints. */
+    uint16_t cbSsepc;
+} VUSBDESCENDPOINTEX;
+/** Pointer to a parsed USB endpoint descriptor. */
+typedef VUSBDESCENDPOINTEX *PVUSBDESCENDPOINTEX;
+/** Pointer to a const parsed USB endpoint descriptor. */
+typedef const VUSBDESCENDPOINTEX *PCVUSBDESCENDPOINTEX;
+
+
+/** @name USB Control message recipient codes (from spec)
+ * @{ */
+#define VUSB_TO_DEVICE          0x0
+#define VUSB_TO_INTERFACE       0x1
+#define VUSB_TO_ENDPOINT        0x2
+#define VUSB_TO_OTHER           0x3
+#define VUSB_RECIP_MASK         0x1f
+/** @} */
+
+/** @name USB control pipe setup packet structure (from spec)
+ * @{ */
+#define VUSB_REQ_SHIFT          (5)
+#define VUSB_REQ_STANDARD       (0x0 << VUSB_REQ_SHIFT)
+#define VUSB_REQ_CLASS          (0x1 << VUSB_REQ_SHIFT)
+#define VUSB_REQ_VENDOR         (0x2 << VUSB_REQ_SHIFT)
+#define VUSB_REQ_RESERVED       (0x3 << VUSB_REQ_SHIFT)
+#define VUSB_REQ_MASK           (0x3 << VUSB_REQ_SHIFT)
+/** @} */
+
+#define VUSB_DIR_TO_DEVICE      0x00
+#define VUSB_DIR_TO_HOST        0x80
+#define VUSB_DIR_MASK           0x80
+
+/**
+ * USB Setup request (from spec)
+ */
+typedef struct vusb_setup
+{
+    uint8_t  bmRequestType;
+    uint8_t  bRequest;
+    uint16_t wValue;
+    uint16_t wIndex;
+    uint16_t wLength;
+} VUSBSETUP;
+/** Pointer to a setup request. */
+typedef VUSBSETUP *PVUSBSETUP;
+/** Pointer to a const setup request. */
+typedef const VUSBSETUP *PCVUSBSETUP;
+
+/** @name USB Standard device requests (from spec)
+ * @{ */
+#define VUSB_REQ_GET_STATUS         0x00
+#define VUSB_REQ_CLEAR_FEATURE      0x01
+#define VUSB_REQ_SET_FEATURE        0x03
+#define VUSB_REQ_SET_ADDRESS        0x05
+#define VUSB_REQ_GET_DESCRIPTOR     0x06
+#define VUSB_REQ_SET_DESCRIPTOR     0x07
+#define VUSB_REQ_GET_CONFIGURATION  0x08
+#define VUSB_REQ_SET_CONFIGURATION  0x09
+#define VUSB_REQ_GET_INTERFACE      0x0a
+#define VUSB_REQ_SET_INTERFACE      0x0b
+#define VUSB_REQ_SYNCH_FRAME        0x0c
+#define VUSB_REQ_MAX                0x0d
+/** @} */
+
+/** @} */ /* end of grp_vusb_std */
+
+
+
+/** @name USB Standard version flags.
+ * @{ */
+/** Indicates USB 1.1 support. */
+#define VUSB_STDVER_11              RT_BIT(1)
+/** Indicates USB 2.0 support. */
+#define VUSB_STDVER_20              RT_BIT(2)
+/** Indicates USB 3.0 support. */
+#define VUSB_STDVER_30              RT_BIT(3)
+/** @} */
+
+/**
+ * USB port/device speeds.
+ */
+typedef enum VUSBSPEED
+{
+    /** Undetermined/unknown speed. */
+    VUSB_SPEED_UNKNOWN = 0,
+    /** Low-speed (LS), 1.5 Mbit/s, USB 1.0. */
+    VUSB_SPEED_LOW,
+    /** Full-speed (FS), 12 Mbit/s, USB 1.1. */
+    VUSB_SPEED_FULL,
+    /** High-speed (HS), 480 Mbit/s, USB 2.0. */
+    VUSB_SPEED_HIGH,
+    /** Variable speed, wireless USB 2.5. */
+    VUSB_SPEED_VARIABLE,
+    /** SuperSpeed (SS), 5.0 Gbit/s, USB 3.0. */
+    VUSB_SPEED_SUPER,
+    /** SuperSpeed+ (SS+), 10.0 Gbit/s, USB 3.1. */
+    VUSB_SPEED_SUPERPLUS,
+    /** The usual 32-bit hack. */
+    VUSB_SPEED_32BIT_HACK = 0x7fffffff
+} VUSBSPEED;
+
+/**
+ * VUSB transfer direction.
+ */
+typedef enum VUSBDIRECTION
+{
+    /** Setup */
+    VUSBDIRECTION_SETUP = 0,
+#define VUSB_DIRECTION_SETUP    VUSBDIRECTION_SETUP
+    /** In - Device to host. */
+    VUSBDIRECTION_IN = 1,
+#define VUSB_DIRECTION_IN       VUSBDIRECTION_IN
+    /** Out - Host to device. */
+    VUSBDIRECTION_OUT = 2,
+#define VUSB_DIRECTION_OUT  VUSBDIRECTION_OUT
+    /** Invalid direction */
+    VUSBDIRECTION_INVALID = 0x7f
+} VUSBDIRECTION;
+
+/**
+ * VUSB Transfer types.
+ */
+typedef enum VUSBXFERTYPE
+{
+    /** Control message. Used to represent a single control transfer. */
+    VUSBXFERTYPE_CTRL = 0,
+    /* Isochronous transfer. */
+    VUSBXFERTYPE_ISOC,
+    /** Bulk transfer. */
+    VUSBXFERTYPE_BULK,
+    /** Interrupt transfer. */
+    VUSBXFERTYPE_INTR,
+    /** Complete control message. Used to represent an entire control message. */
+    VUSBXFERTYPE_MSG,
+    /** Invalid transfer type. */
+    VUSBXFERTYPE_INVALID = 0x7f
+} VUSBXFERTYPE;
+
+/** Number of valid USB transfer types - KEEP in sync with VUSBXFERTYPE!. */
+#define VUSBXFERTYPE_ELEMENTS (5)
+
+/** Pointer to a VBox USB device interface. */
+typedef struct VUSBIDEVICE      *PVUSBIDEVICE;
+
+/** Pointer to a VUSB RootHub port interface. */
+typedef struct VUSBIROOTHUBPORT *PVUSBIROOTHUBPORT;
+
+/** Pointer to an USB request descriptor. */
+typedef struct VUSBURB          *PVUSBURB;
+
+
+
+/**
+ * VBox USB port bitmap.
+ *
+ * Bit 0 == Port 0, ... , Bit 127 == Port 127.
+ */
+typedef struct VUSBPORTBITMAP
+{
+    /** 128 bits */
+    char ach[16];
+} VUSBPORTBITMAP;
+/** Pointer to a VBox USB port bitmap. */
+typedef VUSBPORTBITMAP *PVUSBPORTBITMAP;
+
+#ifndef RDESKTOP
+
+/**
+ * The VUSB RootHub port interface provided by the HCI (down).
+ * Pair with VUSBIROOTCONNECTOR
+ */
+typedef struct VUSBIROOTHUBPORT
+{
+    /**
+     * Get the number of available ports in the hub.
+     *
+     * @returns The number of ports available.
+     * @param   pInterface      Pointer to this structure.
+     * @param   pAvailable      Bitmap indicating the available ports. Set bit == available port.
+     */
+    DECLR3CALLBACKMEMBER(unsigned, pfnGetAvailablePorts,(PVUSBIROOTHUBPORT pInterface, PVUSBPORTBITMAP pAvailable));
+
+    /**
+     * Gets the supported USB versions.
+     *
+     * @returns The mask of supported USB versions.
+     * @param   pInterface      Pointer to this structure.
+     */
+    DECLR3CALLBACKMEMBER(uint32_t, pfnGetUSBVersions,(PVUSBIROOTHUBPORT pInterface));
+
+    /**
+     * A device is being attached to a port in the roothub.
+     *
+     * @param   pInterface      Pointer to this structure.
+     * @param   pDev            Pointer to the device being attached.
+     * @param   uPort           The port number assigned to the device.
+     */
+    DECLR3CALLBACKMEMBER(int, pfnAttach,(PVUSBIROOTHUBPORT pInterface, PVUSBIDEVICE pDev, unsigned uPort));
+
+    /**
+     * A device is being detached from a port in the roothub.
+     *
+     * @param   pInterface      Pointer to this structure.
+     * @param   pDev            Pointer to the device being detached.
+     * @param   uPort           The port number assigned to the device.
+     */
+    DECLR3CALLBACKMEMBER(void, pfnDetach,(PVUSBIROOTHUBPORT pInterface, PVUSBIDEVICE pDev, unsigned uPort));
+
+    /**
+     * Reset the root hub.
+     *
+     * @returns VBox status code.
+     * @param   pInterface      Pointer to this structure.
+     * @param   pResetOnLinux   Whether or not to do real reset on linux.
+     */
+    DECLR3CALLBACKMEMBER(int, pfnReset,(PVUSBIROOTHUBPORT pInterface, bool fResetOnLinux));
+
+    /**
+     * Transfer completion callback routine.
+     *
+     * VUSB will call this when a transfer have been completed
+     * in a one or another way.
+     *
+     * @param   pInterface      Pointer to this structure.
+     * @param   pUrb            Pointer to the URB in question.
+     */
+    DECLR3CALLBACKMEMBER(void, pfnXferCompletion,(PVUSBIROOTHUBPORT pInterface, PVUSBURB urb));
+
+    /**
+     * Handle transfer errors.
+     *
+     * VUSB calls this when a transfer attempt failed. This function will respond
+     * indicating whether to retry or complete the URB with failure.
+     *
+     * @returns Retry indicator.
+     * @param   pInterface      Pointer to this structure.
+     * @param   pUrb            Pointer to the URB in question.
+     */
+    DECLR3CALLBACKMEMBER(bool, pfnXferError,(PVUSBIROOTHUBPORT pInterface, PVUSBURB pUrb));
+
+    /**
+     * Processes a new frame if periodic frame processing is enabled.
+     *
+     * @returns Flag whether there was activity which influences the frame rate.
+     * @param   pInterface      Pointer to this structure.
+     * @param   u32FrameNo      The frame number.
+     */
+    DECLR3CALLBACKMEMBER(bool, pfnStartFrame, (PVUSBIROOTHUBPORT pInterface, uint32_t u32FrameNo));
+
+    /**
+     * Informs the callee about a change in the frame rate due to too many idle cycles or
+     * when seeing activity after some idle time.
+     *
+     * @returns nothing.
+     * @param   pInterface      Pointer to this structure.
+     * @param   u32FrameRate    The new frame rate.
+     */
+    DECLR3CALLBACKMEMBER(void, pfnFrameRateChanged, (PVUSBIROOTHUBPORT pInterface, uint32_t u32FrameRate));
+
+    /** Alignment dummy. */
+    RTR3PTR Alignment;
+
+} VUSBIROOTHUBPORT;
+/** VUSBIROOTHUBPORT interface ID. */
+#define VUSBIROOTHUBPORT_IID                    "6571aece-6c33-4714-a8ac-9508a3b8b429"
+
+/** Pointer to a VUSB RootHub connector interface. */
+typedef struct VUSBIROOTHUBCONNECTOR *PVUSBIROOTHUBCONNECTOR;
+/**
+ * The VUSB RootHub connector interface provided by the VBox USB RootHub driver
+ * (up).
+ * Pair with VUSBIROOTHUBPORT.
+ */
+typedef struct VUSBIROOTHUBCONNECTOR
+{
+    /**
+     * Sets the URB parameters for the caller.
+     *
+     * @returns VBox status code.
+     * @param   pInterface  Pointer to this struct.
+     * @param   cbHci       Size of the data private to the HCI for each URB when allocated.
+     * @param   cbHciTd     Size of one transfer descriptor. The number of transfer descriptors
+     *                      is given VUSBIROOTHUBCONNECTOR::pfnNewUrb for each URB to calculate the
+     *                      final amount of memory required for the TDs.
+     *
+     * @note This must be called before starting to allocate any URB or otherwise there will be no
+     *       data available for the HCI.
+     */
+    DECLR3CALLBACKMEMBER(int, pfnSetUrbParams, (PVUSBIROOTHUBCONNECTOR pInterface, size_t cbHci, size_t cbHciTd));
+
+    /**
+     * Allocates a new URB for a transfer.
+     *
+     * Either submit using pfnSubmitUrb or free using VUSBUrbFree().
+     *
+     * @returns Pointer to a new URB.
+     * @returns NULL on failure - try again later.
+     *          This will not fail if the device wasn't found. We'll fail it
+     *          at submit time, since that makes the usage of this api simpler.
+     * @param   pInterface  Pointer to this struct.
+     * @param   DstAddress  The destination address of the URB.
+     * @param   pDev        Optional device pointer the URB is for.
+     * @param   enmType     Type of the URB.
+     * @param   enmDir      Data transfer direction.
+     * @param   cbData      The amount of data space required.
+     * @param   cTds        The amount of TD space.
+     * @param   pszTag      Custom URB tag assigned by the caller, only for
+     *                      logged builds and optional.
+     *
+     * @note pDev should be NULL in most cases. The only useful case is for USB3 where
+     *       it is required for the SET_ADDRESS request because USB3 uses unicast traffic.
+     */
+    DECLR3CALLBACKMEMBER(PVUSBURB, pfnNewUrb,(PVUSBIROOTHUBCONNECTOR pInterface, uint8_t DstAddress, PVUSBIDEVICE pDev,
+                                              VUSBXFERTYPE enmType, VUSBDIRECTION enmDir, uint32_t cbData, uint32_t cTds, const char *pszTag));
+
+    /**
+     * Free an URB not submitted yet.
+     *
+     * @returns VBox status code.
+     * @param   pInterface  Pointer to this struct.
+     * @param   pUrb        Pointer to the URB to free returned by VUSBIROOTHUBCONNECTOR::pfnNewUrb.
+     */
+    DECLR3CALLBACKMEMBER(int, pfnFreeUrb, (PVUSBIROOTHUBCONNECTOR pInterface, PVUSBURB pUrb));
+
+    /**
+     * Submits a URB for transfer.
+     * The transfer will do asynchronously if possible.
+     *
+     * @returns VBox status code.
+     * @param   pInterface  Pointer to this struct.
+     * @param   pUrb        Pointer to the URB returned by pfnNewUrb.
+     *                      The URB will be freed in case of failure.
+     * @param   pLed        Pointer to USB Status LED
+     */
+    DECLR3CALLBACKMEMBER(int, pfnSubmitUrb,(PVUSBIROOTHUBCONNECTOR pInterface, PVUSBURB pUrb, struct PDMLED *pLed));
+
+    /**
+     * Call to service asynchronous URB completions in a polling fashion.
+     *
+     * Reaped URBs will be finished by calling the completion callback,
+     * thus there is no return code or input or anything from this function
+     * except for potential state changes elsewhere.
+     *
+     * @returns VINF_SUCCESS if no URBs are pending upon return.
+     * @returns VERR_TIMEOUT if one or more URBs are still in flight upon returning.
+     * @returns Other VBox status code.
+     *
+     * @param   pInterface  Pointer to this struct.
+     * @param   pDevice     Pointer to a USB device.
+     * @param   cMillies    Number of milliseconds to poll for completion.
+     */
+    DECLR3CALLBACKMEMBER(void, pfnReapAsyncUrbs,(PVUSBIROOTHUBCONNECTOR pInterface, PVUSBIDEVICE pDevice, RTMSINTERVAL cMillies));
+
+    /**
+     * Cancels and completes - with CRC failure - all URBs queued on an endpoint.
+     * This is done in response to guest URB cancellation.
+     *
+     * @returns VBox status code.
+     * @param   pInterface  Pointer to this struct.
+     * @param   pUrb        Pointer to a previously submitted URB.
+     */
+    DECLR3CALLBACKMEMBER(int, pfnCancelUrbsEp,(PVUSBIROOTHUBCONNECTOR pInterface, PVUSBURB pUrb));
+
+    /**
+     * Cancels and completes - with CRC failure - all in-flight async URBs.
+     * This is typically done before saving a state.
+     *
+     * @param   pInterface  Pointer to this struct.
+     */
+    DECLR3CALLBACKMEMBER(void, pfnCancelAllUrbs,(PVUSBIROOTHUBCONNECTOR pInterface));
+
+    /**
+     * Cancels and completes - with CRC failure - all URBs queued on an endpoint.
+     * This is done in response to a guest endpoint/pipe abort.
+     *
+     * @returns VBox status code.
+     * @param   pInterface  Pointer to this struct.
+     * @param   pDevice     Pointer to a USB device.
+     * @param   EndPt       Endpoint number.
+     * @param   enmDir      Endpoint direction.
+     */
+    DECLR3CALLBACKMEMBER(int, pfnAbortEp,(PVUSBIROOTHUBCONNECTOR pInterface, PVUSBIDEVICE pDevice, int EndPt, VUSBDIRECTION enmDir));
+
+    /**
+     * Attach the device to the root hub.
+     * The device must not be attached to any hub for this call to succeed.
+     *
+     * @returns VBox status code.
+     * @param   pInterface  Pointer to this struct.
+     * @param   pDevice     Pointer to the device (interface) to attach.
+     */
+    DECLR3CALLBACKMEMBER(int, pfnAttachDevice,(PVUSBIROOTHUBCONNECTOR pInterface, PVUSBIDEVICE pDevice));
+
+    /**
+     * Detach the device from the root hub.
+     * The device must already be attached for this call to succeed.
+     *
+     * @returns VBox status code.
+     * @param   pInterface  Pointer to this struct.
+     * @param   pDevice     Pointer to the device (interface) to detach.
+     */
+    DECLR3CALLBACKMEMBER(int, pfnDetachDevice,(PVUSBIROOTHUBCONNECTOR pInterface, PVUSBIDEVICE pDevice));
+
+    /**
+     * Sets periodic frame processing.
+     *
+     * @returns VBox status code.
+     * @param   pInterface  Pointer to this struct.
+     * @param   uFrameRate  The target frame rate in Hertz, 0 disables periodic frame processing.
+     *                      The real frame rate might be lower if there is no activity for a certain period or
+     *                      higher if there is a need for catching up with where the guest expects the device to be.
+     */
+    DECLR3CALLBACKMEMBER(int, pfnSetPeriodicFrameProcessing, (PVUSBIROOTHUBCONNECTOR pInterface, uint32_t uFrameRate));
+
+    /**
+     * Returns the current frame rate for the periodic frame processing.
+     *
+     * @returns Frame rate for periodic frame processing.
+     * @retval  0 if disabled.
+     * @param   pInterface  Pointer to this struct.
+     */
+    DECLR3CALLBACKMEMBER(uint32_t, pfnGetPeriodicFrameRate, (PVUSBIROOTHUBCONNECTOR pInterface));
+
+    /**
+     * Updates the internally stored isochronous scheduling frame for a given
+     * endpoint and returns the delta between the current and previous frame.
+     *
+     * @returns Delta between currently and previously scheduled frame.
+     * @retval  0 if no previous frame was set.
+     * @param   pInterface  Pointer to this struct.
+     * @param   pDevice     Pointer to a USB device.
+     * @param   EndPt       Endpoint number.
+     * @param   enmDir      Endpoint direction.
+     * @param   uNewFrameID The frame ID of a new transfer.
+     * @param   uBits       The number of significant bits in frame ID.
+     */
+    DECLR3CALLBACKMEMBER(uint32_t, pfnUpdateIsocFrameDelta, (PVUSBIROOTHUBCONNECTOR pInterface, PVUSBIDEVICE pDevice,
+                                                             int EndPt, VUSBDIRECTION enmDir, uint16_t uNewFrameID, uint8_t uBits));
+
+    /** Alignment dummy. */
+    RTR3PTR Alignment;
+
+} VUSBIROOTHUBCONNECTOR;
+AssertCompileSizeAlignment(VUSBIROOTHUBCONNECTOR, 8);
+/** VUSBIROOTHUBCONNECTOR interface ID. */
+#define VUSBIROOTHUBCONNECTOR_IID               "662d7822-b9c6-43b5-88b6-5d59f0106e46"
+
+
+#ifdef IN_RING3
+/** @copydoc VUSBIROOTHUBCONNECTOR::pfnSetUrbParams */
+DECLINLINE(int) VUSBIRhSetUrbParams(PVUSBIROOTHUBCONNECTOR pInterface, size_t cbHci, size_t cbHciTd)
+{
+    return pInterface->pfnSetUrbParams(pInterface, cbHci, cbHciTd);
+}
+
+/** @copydoc VUSBIROOTHUBCONNECTOR::pfnNewUrb */
+DECLINLINE(PVUSBURB) VUSBIRhNewUrb(PVUSBIROOTHUBCONNECTOR pInterface, uint8_t DstAddress, PVUSBIDEVICE pDev,
+                                   VUSBXFERTYPE enmType, VUSBDIRECTION enmDir, uint32_t cbData, uint32_t cTds, const char *pszTag)
+{
+    return pInterface->pfnNewUrb(pInterface, DstAddress, pDev, enmType, enmDir, cbData, cTds, pszTag);
+}
+
+/** @copydoc VUSBIROOTHUBCONNECTOR::pfnFreeUrb */
+DECLINLINE(int) VUSBIRhFreeUrb(PVUSBIROOTHUBCONNECTOR pInterface, PVUSBURB pUrb)
+{
+    return pInterface->pfnFreeUrb(pInterface, pUrb);
+}
+
+/** @copydoc VUSBIROOTHUBCONNECTOR::pfnSubmitUrb */
+DECLINLINE(int) VUSBIRhSubmitUrb(PVUSBIROOTHUBCONNECTOR pInterface, PVUSBURB pUrb, struct PDMLED *pLed)
+{
+    return pInterface->pfnSubmitUrb(pInterface, pUrb, pLed);
+}
+
+/** @copydoc VUSBIROOTHUBCONNECTOR::pfnReapAsyncUrbs */
+DECLINLINE(void) VUSBIRhReapAsyncUrbs(PVUSBIROOTHUBCONNECTOR pInterface, PVUSBIDEVICE pDevice, RTMSINTERVAL cMillies)
+{
+    pInterface->pfnReapAsyncUrbs(pInterface, pDevice, cMillies);
+}
+
+/** @copydoc VUSBIROOTHUBCONNECTOR::pfnCancelAllUrbs */
+DECLINLINE(void) VUSBIRhCancelAllUrbs(PVUSBIROOTHUBCONNECTOR pInterface)
+{
+    pInterface->pfnCancelAllUrbs(pInterface);
+}
+
+/** @copydoc VUSBIROOTHUBCONNECTOR::pfnAttachDevice */
+DECLINLINE(int) VUSBIRhAttachDevice(PVUSBIROOTHUBCONNECTOR pInterface, PVUSBIDEVICE pDevice)
+{
+    return pInterface->pfnAttachDevice(pInterface, pDevice);
+}
+
+/** @copydoc VUSBIROOTHUBCONNECTOR::pfnDetachDevice */
+DECLINLINE(int) VUSBIRhDetachDevice(PVUSBIROOTHUBCONNECTOR pInterface, PVUSBIDEVICE pDevice)
+{
+    return pInterface->pfnDetachDevice(pInterface, pDevice);
+}
+
+/** @copydoc VUSBIROOTHUBCONNECTOR::pfnSetPeriodicFrameProcessing */
+DECLINLINE(int) VUSBIRhSetPeriodicFrameProcessing(PVUSBIROOTHUBCONNECTOR pInterface, uint32_t uFrameRate)
+{
+    return pInterface->pfnSetPeriodicFrameProcessing(pInterface, uFrameRate);
+}
+
+/** @copydoc VUSBIROOTHUBCONNECTOR::pfnGetPeriodicFrameRate */
+DECLINLINE(uint32_t) VUSBIRhGetPeriodicFrameRate(PVUSBIROOTHUBCONNECTOR pInterface)
+{
+    return pInterface->pfnGetPeriodicFrameRate(pInterface);
+}
+#endif /* IN_RING3 */
+
+#endif /* ! RDESKTOP */
+
+
+/**
+ * VUSB device reset completion callback function.
+ * This is called by the reset thread when the reset has been completed.
+ *
+ * @param   pDev        Pointer to the virtual USB device core.
+ * @param   rc      The VBox status code of the reset operation.
+ * @param   pvUser      User specific argument.
+ *
+ * @thread  The reset thread or EMT.
+ */
+typedef DECLCALLBACK(void) FNVUSBRESETDONE(PVUSBIDEVICE pDevice, int rc, void *pvUser);
+/** Pointer to a device reset completion callback function (FNUSBRESETDONE). */
+typedef FNVUSBRESETDONE *PFNVUSBRESETDONE;
+
+/**
+ * The state of a VUSB Device.
+ *
+ * @remark  The order of these states is vital.
+ */
+typedef enum VUSBDEVICESTATE
+{
+    VUSB_DEVICE_STATE_INVALID = 0,
+    VUSB_DEVICE_STATE_DETACHED,
+    VUSB_DEVICE_STATE_ATTACHED,
+    VUSB_DEVICE_STATE_POWERED,
+    VUSB_DEVICE_STATE_DEFAULT,
+    VUSB_DEVICE_STATE_ADDRESS,
+    VUSB_DEVICE_STATE_CONFIGURED,
+    VUSB_DEVICE_STATE_SUSPENDED,
+    /** The device is being reset. Don't mess with it.
+     * Next states: VUSB_DEVICE_STATE_DEFAULT, VUSB_DEVICE_STATE_DESTROYED
+     */
+    VUSB_DEVICE_STATE_RESET,
+    /** The device has been destroyed. */
+    VUSB_DEVICE_STATE_DESTROYED,
+    /** The usual 32-bit hack. */
+    VUSB_DEVICE_STATE_32BIT_HACK = 0x7fffffff
+} VUSBDEVICESTATE;
+
+#ifndef RDESKTOP
+
+/**
+ * USB Device Interface (up).
+ * No interface pair.
+ */
+typedef struct VUSBIDEVICE
+{
+    /**
+     * Resets the device.
+     *
+     * Since a device reset shall take at least 10ms from the guest point of view,
+     * it must be performed asynchronously. We create a thread which performs this
+     * operation and ensures it will take at least 10ms.
+     *
+     * At times - like init - a synchronous reset is required, this can be done
+     * by passing NULL for pfnDone.
+     *
+     * -- internal stuff, move it --
+     * While the device is being reset it is in the VUSB_DEVICE_STATE_RESET state.
+     * On completion it will be in the VUSB_DEVICE_STATE_DEFAULT state if successful,
+     * or in the VUSB_DEVICE_STATE_DETACHED state if the rest failed.
+     * -- internal stuff, move it --
+     *
+     * @returns VBox status code.
+     * @param   pInterface      Pointer to this structure.
+     * @param   fResetOnLinux   Set if we can permit a real reset and a potential logical
+     *                          device reconnect on linux hosts.
+     * @param   pfnDone         Pointer to the completion routine. If NULL a synchronous
+     *                          reset  is preformed not respecting the 10ms.
+     * @param   pvUser          User argument to the completion routine.
+     * @param   pVM             The cross context VM structure.  Required if pfnDone
+     *                          is not NULL.
+     */
+    DECLR3CALLBACKMEMBER(int, pfnReset,(PVUSBIDEVICE pInterface, bool fResetOnLinux,
+                                        PFNVUSBRESETDONE pfnDone, void *pvUser, PVM pVM));
+
+    /**
+     * Powers on the device.
+     *
+     * @returns VBox status code.
+     * @param   pInterface      Pointer to the device interface structure.
+     */
+    DECLR3CALLBACKMEMBER(int, pfnPowerOn,(PVUSBIDEVICE pInterface));
+
+    /**
+     * Powers off the device.
+     *
+     * @returns VBox status code.
+     * @param   pInterface      Pointer to the device interface structure.
+     */
+    DECLR3CALLBACKMEMBER(int, pfnPowerOff,(PVUSBIDEVICE pInterface));
+
+    /**
+     * Get the state of the device.
+     *
+     * @returns Device state.
+     * @param   pInterface      Pointer to the device interface structure.
+     */
+    DECLR3CALLBACKMEMBER(VUSBDEVICESTATE, pfnGetState,(PVUSBIDEVICE pInterface));
+
+    /**
+     * Returns whether the device implements the saved state handlers
+     * and doesn't need to get detached.
+     *
+     * @returns true if the device supports saving the state, false otherwise.
+     * @param   pInterface      Pointer to the device interface structure.
+     */
+    DECLR3CALLBACKMEMBER(bool, pfnIsSavedStateSupported,(PVUSBIDEVICE pInterface));
+
+    /**
+     * Get the speed the device is operating at.
+     *
+     * @returns Device state.
+     * @param   pInterface      Pointer to the device interface structure.
+     */
+    DECLR3CALLBACKMEMBER(VUSBSPEED, pfnGetSpeed,(PVUSBIDEVICE pInterface));
+
+} VUSBIDEVICE;
+/** VUSBIDEVICE interface ID. */
+#define VUSBIDEVICE_IID                         "af576b38-e8ca-4db7-810a-2596d8d57ca0"
+
+
+#ifdef IN_RING3
+/**
+ * Resets the device.
+ *
+ * Since a device reset shall take at least 10ms from the guest point of view,
+ * it must be performed asynchronously. We create a thread which performs this
+ * operation and ensures it will take at least 10ms.
+ *
+ * At times - like init - a synchronous reset is required, this can be done
+ * by passing NULL for pfnDone.
+ *
+ * -- internal stuff, move it --
+ * While the device is being reset it is in the VUSB_DEVICE_STATE_RESET state.
+ * On completion it will be in the VUSB_DEVICE_STATE_DEFAULT state if successful,
+ * or in the VUSB_DEVICE_STATE_DETACHED state if the rest failed.
+ * -- internal stuff, move it --
+ *
+ * @returns VBox status code.
+ * @param   pInterface      Pointer to the device interface structure.
+ * @param   fResetOnLinux   Set if we can permit a real reset and a potential logical
+ *                          device reconnect on linux hosts.
+ * @param   pfnDone         Pointer to the completion routine.  If NULL a
+ *                          synchronous reset is preformed not respecting the
+ *                          10ms.
+ * @param   pvUser          User argument to the completion routine.
+ * @param   pVM             The cross context VM structure.  Required if pfnDone
+ *                          is not NULL.
+ *
+ * NULL is acceptable Required if callback in EMT is desired, NULL is otherwise
+ *                          acceptable.
+ */
+DECLINLINE(int) VUSBIDevReset(PVUSBIDEVICE pInterface, bool fResetOnLinux, PFNVUSBRESETDONE pfnDone, void *pvUser, PVM pVM)
+{
+    return pInterface->pfnReset(pInterface, fResetOnLinux, pfnDone, pvUser, pVM);
+}
+
+/**
+ * Powers on the device.
+ *
+ * @returns VBox status code.
+ * @param   pInterface      Pointer to the device interface structure.
+ */
+DECLINLINE(int) VUSBIDevPowerOn(PVUSBIDEVICE pInterface)
+{
+    return pInterface->pfnPowerOn(pInterface);
+}
+
+/**
+ * Powers off the device.
+ *
+ * @returns VBox status code.
+ * @param   pInterface      Pointer to the device interface structure.
+ */
+DECLINLINE(int) VUSBIDevPowerOff(PVUSBIDEVICE pInterface)
+{
+    return pInterface->pfnPowerOff(pInterface);
+}
+
+/**
+ * Get the state of the device.
+ *
+ * @returns Device state.
+ * @param   pInterface      Pointer to the device interface structure.
+ */
+DECLINLINE(VUSBDEVICESTATE) VUSBIDevGetState(PVUSBIDEVICE pInterface)
+{
+    return pInterface->pfnGetState(pInterface);
+}
+
+/**
+ * @copydoc VUSBIDEVICE::pfnIsSavedStateSupported
+ */
+DECLINLINE(bool) VUSBIDevIsSavedStateSupported(PVUSBIDEVICE pInterface)
+{
+    return pInterface->pfnIsSavedStateSupported(pInterface);
+}
+#endif /* IN_RING3 */
+
+#endif /* ! RDESKTOP */
+
+/** @name URB
+ * @{ */
+
+/**
+ * VUSB Transfer status codes.
+ */
+typedef enum VUSBSTATUS
+{
+    /** Transer was ok. */
+    VUSBSTATUS_OK = 0,
+    /** Transfer stalled, endpoint halted. */
+    VUSBSTATUS_STALL,
+    /** Device not responding. */
+    VUSBSTATUS_DNR,
+    /** CRC error. */
+    VUSBSTATUS_CRC,
+    /** Data overrun error. */
+    VUSBSTATUS_DATA_UNDERRUN,
+    /** Data overrun error. */
+    VUSBSTATUS_DATA_OVERRUN,
+    /** The isochronous buffer hasn't been touched. */
+    VUSBSTATUS_NOT_ACCESSED,
+    /** Canceled/undone URB (VUSB internal). */
+    VUSBSTATUS_UNDO,
+    /** Canceled URB. */
+    VUSBSTATUS_CANCELED,
+    /** Invalid status. */
+    VUSBSTATUS_INVALID = 0x7f
+} VUSBSTATUS;
+
+
+/**
+ * The URB states
+ */
+typedef enum VUSBURBSTATE
+{
+    /** The usual invalid state. */
+    VUSBURBSTATE_INVALID = 0,
+    /** The URB is free, i.e. not in use.
+     * Next state: ALLOCATED */
+    VUSBURBSTATE_FREE,
+    /** The URB is allocated, i.e. being prepared for submission.
+     * Next state: FREE, IN_FLIGHT */
+    VUSBURBSTATE_ALLOCATED,
+    /** The URB is in flight.
+     * Next state: REAPED, CANCELLED */
+    VUSBURBSTATE_IN_FLIGHT,
+    /** The URB has been reaped and is being completed.
+     * Next state: FREE */
+    VUSBURBSTATE_REAPED,
+    /** The URB has been cancelled and is awaiting reaping and immediate freeing.
+     * Next state: FREE */
+    VUSBURBSTATE_CANCELLED,
+    /** The end of the valid states (exclusive). */
+    VUSBURBSTATE_END,
+    /** The usual 32-bit blow up. */
+    VUSBURBSTATE_32BIT_HACK = 0x7fffffff
+} VUSBURBSTATE;
+
+
+/**
+ * Information about a isochronous packet.
+ */
+typedef struct VUSBURBISOCPKT
+{
+    /** The size of the packet.
+     * IN: The packet size. I.e. the number of bytes to the next packet or end of buffer.
+     * OUT: The actual size transferred. */
+    uint32_t        cb;
+    /** The offset of the packet. (Relative to VUSBURB::abData[0].)
+     * OUT: This can be changed by the USB device if it does some kind of buffer squeezing. */
+    uint32_t        off;
+    /** The status of the transfer.
+     * IN: VUSBSTATUS_INVALID
+     * OUT: VUSBSTATUS_INVALID if nothing was done, otherwise the correct status. */
+    VUSBSTATUS      enmStatus;
+} VUSBURBISOCPKT;
+/** Pointer to a isochronous packet. */
+typedef VUSBURBISOCPKT *PVUSBURBISOCPTK;
+/** Pointer to a const isochronous packet. */
+typedef const VUSBURBISOCPKT *PCVUSBURBISOCPKT;
+
+/** Private controller emulation specific data for the associated USB request descriptor. */
+typedef struct VUSBURBHCIINT *PVUSBURBHCI;
+/** Private controller emulation specific TD data. */
+typedef struct VUSBURBHCITDINT *PVUSBURBHCITD;
+/** Private VUSB/roothub related state for the associated URB. */
+typedef struct VUSBURBVUSBINT *PVUSBURBVUSB;
+
+/**
+ * Asynchronous USB request descriptor
+ */
+typedef struct VUSBURB
+{
+    /** URB magic value. */
+    uint32_t        u32Magic;
+    /** The USR state. */
+    VUSBURBSTATE    enmState;
+    /** Flag whether the URB is about to be completed,
+     * either by the I/O thread or the cancellation worker.
+     */
+    volatile bool   fCompleting;
+    /** URB description, can be null. intended for logging. */
+    char           *pszDesc;
+
+#ifdef RDESKTOP
+    /** The next URB in rdesktop-vrdp's linked list */
+    PVUSBURB        pNext;
+    /** The previous URB in rdesktop-vrdp's linked list */
+    PVUSBURB        pPrev;
+    /** The vrdp handle for the URB */
+    uint32_t        handle;
+    /** Pointer used to find the usb proxy device */
+    struct VUSBDEV *pDev;
+#endif
+
+    /** The VUSB stack private data. */
+    PVUSBURBVUSB        pVUsb;
+    /** Private host controller data associated with this URB. */
+    PVUSBURBHCI         pHci;
+    /** Pointer to the host controller transfer descriptor array. */
+    PVUSBURBHCITD       paTds;
+
+    /** The device data. */
+    struct VUSBURBDEV
+    {
+        /** Pointer to private device specific data.  */
+        void             *pvPrivate;
+        /** Used by the device when linking the URB in some list of its own.   */
+        PVUSBURB          pNext;
+    } Dev;
+
+    /** The device address.
+     * This is set at allocation time. */
+    uint8_t         DstAddress;
+
+    /** The endpoint.
+     * IN: Must be set before submitting the URB.
+     * @remark This does not have the high bit (direction) set! */
+    uint8_t         EndPt;
+    /** The transfer type.
+     * IN: Set at allocation time. */
+    VUSBXFERTYPE    enmType;
+    /** The transfer direction.
+     * IN: Set at allocation time. */
+    VUSBDIRECTION   enmDir;
+    /** Indicates whether it is OK to receive/send less data than requested.
+     * IN: Must be initialized before submitting the URB. */
+    bool            fShortNotOk;
+    /** The transfer status.
+     * OUT: This is set when reaping the URB. */
+    VUSBSTATUS      enmStatus;
+
+    /** The relative starting frame for isochronous transfers.
+     *  Zero indicates "transfer ASAP".
+     * This is ignored when enmType isn't VUSBXFERTYPE_ISOC. */
+    uint16_t        uStartFrameDelta;
+    /** Flag indicating whether the start frame delta is relative
+     *  to the previous transfer (false) or now (true).
+     * This is ignored when enmType isn't VUSBXFERTYPE_ISOC. */
+    bool            fStartRelToNow;
+    /** The number of isochronous packets describe in aIsocPkts.
+     * This is ignored when enmType isn't VUSBXFERTYPE_ISOC. */
+    uint8_t         cIsocPkts;
+    /** The iso packets within abData.
+     * This is ignored when enmType isn't VUSBXFERTYPE_ISOC. */
+    VUSBURBISOCPKT  aIsocPkts[8];
+
+    /** The message length.
+     * IN: The amount of data to send / receive - set at allocation time.
+     * OUT: The amount of data sent / received. */
+    uint32_t        cbData;
+    /** The message data.
+     * IN: On host to device transfers, the data to send.
+     * OUT: On device to host transfers, the data to received.
+     * This array has actually a size of VUsb.cbDataAllocated, not 8KB! */
+    uint8_t         abData[8*_1K];
+} VUSBURB;
+
+/** The magic value of a valid VUSBURB. (Murakami Haruki) */
+#define VUSBURB_MAGIC       UINT32_C(0x19490112)
+
+/** @} */
+
+
+/** @} */
+
+RT_C_DECLS_END
+
+#endif /* !VBOX_INCLUDED_vusb_h */