VBoxGuest.h revision ad27e1d5e48ca41245120c331cc88b50464813ce
/** @file
* VBoxGuest - VirtualBox Guest Additions Driver Interface. (ADD,DEV)
*
* @remarks This is in the process of being split up and usage cleaned up.
*/
/*
* Copyright (C) 2006-2009 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_VBoxGuest_h
#define ___VBox_VBoxGuest_h
#include <VBox/cdefs.h>
#include <VBox/types.h>
#include <iprt/assert.h>
#include <VBox/VMMDev2.h>
#include <VBox/VBoxGuest2.h>
/** @defgroup grp_vboxguest VirtualBox Guest Additions Driver Interface
* @{
*/
/** @todo it would be nice if we could have two define without paths. */
/** @def VBOXGUEST_DEVICE_NAME
* The support device name. */
/** @def VBOXGUEST_USER_DEVICE_NAME
* The support device name of the user accessible device node. */
#if defined(RT_OS_OS2)
# define VBOXGUEST_DEVICE_NAME "\\Dev\\VBoxGst$"
#elif defined(RT_OS_WINDOWS)
# define VBOXGUEST_DEVICE_NAME "\\\\.\\VBoxGuest"
/** The support service name. */
# define VBOXGUEST_SERVICE_NAME "VBoxGuest"
/** Global name for Win2k+ */
# define VBOXGUEST_DEVICE_NAME_GLOBAL "\\\\.\\Global\\VBoxGuest"
/** Win32 driver name */
# define VBOXGUEST_DEVICE_NAME_NT L"\\Device\\VBoxGuest"
/** Device name. */
# define VBOXGUEST_DEVICE_NAME_DOS L"\\DosDevices\\VBoxGuest"
#else /* (PORTME) */
# define VBOXGUEST_DEVICE_NAME "/dev/vboxguest"
# if defined(RT_OS_LINUX)
# define VBOXGUEST_USER_DEVICE_NAME "/dev/vboxuser"
# endif
#endif
#ifndef VBOXGUEST_USER_DEVICE_NAME
# define VBOXGUEST_USER_DEVICE_NAME VBOXGUEST_DEVICE_NAME
#endif
/** Fictive start address of the hypervisor physical memory for MmMapIoSpace. */
#define VBOXGUEST_HYPERVISOR_PHYSICAL_START UINT32_C(0xf8000000)
#if !defined(IN_RC) && !defined(IN_RING0_AGNOSTIC) && !defined(IPRT_NO_CRT)
/** @name VBoxGuest IOCTL codes and structures.
*
* The range 0..15 is for basic driver communication.
* The range 16..31 is for HGCM communication.
* The range 32..47 is reserved for future use.
* The range 48..63 is for OS specific communication.
* The 7th bit is reserved for future hacks.
* The 8th bit is reserved for distinguishing between 32-bit and 64-bit
* processes in future 64-bit guest additions.
*
* @remarks When creating new IOCtl interfaces keep in mind that not all OSes supports
* reporting back the output size. (This got messed up a little bit in VBoxDrv.)
*
* The request size is also a little bit tricky as it's passed as part of the
* request code on unix. The size field is 14 bits on Linux, 12 bits on *BSD,
* 13 bits Darwin, and 8-bits on Solaris. All the BSDs and Darwin kernels
* will make use of the size field, while Linux and Solaris will not. We're of
* course using the size to validate and/or map/lock the request, so it has
* to be valid.
*
* For Solaris we will have to do something special though, 255 isn't
* sufficient for all we need. A 4KB restriction (BSD) is probably not
* too problematic (yet) as a general one.
*
* More info can be found in SUPDRVIOC.h and related sources.
*
* @remarks If adding interfaces that only has input or only has output, some new macros
* needs to be created so the most efficient IOCtl data buffering method can be
* used.
* @{
*/
#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_SPARC64)
# define VBOXGUEST_IOCTL_FLAG 128
#elif defined(RT_ARCH_X86) || defined(RT_ARCH_SPARC)
# define VBOXGUEST_IOCTL_FLAG 0
#else
# error "dunno which arch this is!"
#endif
/** Ring-3 request wrapper for big requests.
*
* This is necessary because the ioctl number scheme on many Unixy OSes (esp. Solaris)
* only allows a relatively small size to be encoded into the request. So, for big
* request this generic form is used instead. */
typedef struct VBGLBIGREQ
{
/** Magic value (VBGLBIGREQ_MAGIC). */
uint32_t u32Magic;
/** The size of the data buffer. */
uint32_t cbData;
/** The user address of the data buffer. */
RTR3PTR pvDataR3;
#if HC_ARCH_BITS == 32
uint32_t u32Padding;
#endif
/** @todo r=bird: We need a 'rc' field for passing VBox status codes. Reused
* some input field as rc on output. */
} VBGLBIGREQ;
/** Pointer to a request wrapper for solaris guests. */
typedef VBGLBIGREQ *PVBGLBIGREQ;
/** Pointer to a const request wrapper for solaris guests. */
typedef const VBGLBIGREQ *PCVBGLBIGREQ;
/** The VBGLBIGREQ::u32Magic value (Ryuu Murakami). */
#define VBGLBIGREQ_MAGIC 0x19520219
#if defined(RT_OS_WINDOWS)
/* @todo Remove IOCTL_CODE later! Integrate it in VBOXGUEST_IOCTL_CODE below. */
/** @todo r=bird: IOCTL_CODE is supposedly defined in some header included by Windows.h or ntddk.h, which is why it wasn't in the #if 0 earlier. See HostDrivers/Support/SUPDrvIOC.h... */
# define IOCTL_CODE(DeviceType, Function, Method, Access, DataSize_ignored) \
( ((DeviceType) << 16) | ((Access) << 14) | ((Function) << 2) | (Method))
# define VBOXGUEST_IOCTL_CODE_(Function, Size) IOCTL_CODE(FILE_DEVICE_UNKNOWN, 2048 + (Function), METHOD_BUFFERED, FILE_WRITE_ACCESS, 0)
# define VBOXGUEST_IOCTL_STRIP_SIZE(Code) (Code)
#elif defined(RT_OS_OS2)
/* No automatic buffering, size not encoded. */
# define VBOXGUEST_IOCTL_CATEGORY 0xc2
# define VBOXGUEST_IOCTL_CODE_(Function, Size) ((unsigned char)(Function))
# define VBOXGUEST_IOCTL_CATEGORY_FAST 0xc3 /**< Also defined in VBoxGuestA-os2.asm. */
# define VBOXGUEST_IOCTL_CODE_FAST_(Function) ((unsigned char)(Function))
# define VBOXGUEST_IOCTL_STRIP_SIZE(Code) (Code)
#elif defined(RT_OS_SOLARIS)
/* No automatic buffering, size limited to 255 bytes => use VBGLBIGREQ for everything. */
# include <sys/ioccom.h>
# define VBOXGUEST_IOCTL_CODE_(Function, Size) _IOWRN('V', (Function), sizeof(VBGLBIGREQ))
# define VBOXGUEST_IOCTL_CODE_FAST_(Function) _IO( 'V', (Function))
# define VBOXGUEST_IOCTL_STRIP_SIZE(Code) (Code)
#elif defined(RT_OS_LINUX)
/* No automatic buffering, size limited to 16KB. */
# include <linux/ioctl.h>
# define VBOXGUEST_IOCTL_CODE_(Function, Size) _IOC(_IOC_READ|_IOC_WRITE, 'V', (Function), (Size))
# define VBOXGUEST_IOCTL_CODE_FAST_(Function) _IO( 'V', (Function))
# define VBOXGUEST_IOCTL_STRIP_SIZE(Code) VBOXGUEST_IOCTL_CODE_(_IOC_NR((Code)), 0)
#elif defined(RT_OS_FREEBSD) /** @todo r=bird: Please do it like SUPDRVIOC to keep it as similar as possible. */
# include <sys/ioccom.h>
# define VBOXGUEST_IOCTL_CODE_(Function, Size) _IOWR('V', (Function), VBGLBIGREQ)
# define VBOXGUEST_IOCTL_CODE_FAST_(Function) _IO( 'V', (Function))
# define VBOXGUEST_IOCTL_STRIP_SIZE(Code) IOCBASECMD(Code)
#else
/* PORTME */
#endif
#define VBOXGUEST_IOCTL_CODE(Function, Size) VBOXGUEST_IOCTL_CODE_((Function) | VBOXGUEST_IOCTL_FLAG, Size)
#define VBOXGUEST_IOCTL_CODE_FAST(Function) VBOXGUEST_IOCTL_CODE_FAST_((Function) | VBOXGUEST_IOCTL_FLAG)
/* Define 32 bit codes to support 32 bit applications requests in the 64 bit guest driver. */
#ifdef RT_ARCH_AMD64
# define VBOXGUEST_IOCTL_CODE_32(Function, Size) VBOXGUEST_IOCTL_CODE_(Function, Size)
# define VBOXGUEST_IOCTL_CODE_FAST_32(Function) VBOXGUEST_IOCTL_CODE_FAST_(Function)
#endif /* RT_ARCH_AMD64 */
/** IOCTL to VBoxGuest to query the VMMDev IO port region start.
* @remarks Ring-0 only. */
#define VBOXGUEST_IOCTL_GETVMMDEVPORT VBOXGUEST_IOCTL_CODE(1, sizeof(VBoxGuestPortInfo))
#pragma pack(4)
typedef struct VBoxGuestPortInfo
{
uint32_t portAddress;
struct VMMDevMemory *pVMMDevMemory;
} VBoxGuestPortInfo;
/** IOCTL to VBoxGuest to wait for a VMMDev host notification */
#define VBOXGUEST_IOCTL_WAITEVENT VBOXGUEST_IOCTL_CODE_(2, sizeof(VBoxGuestWaitEventInfo))
/** @name Result codes for VBoxGuestWaitEventInfo::u32Result
* @{
*/
/** Successful completion, an event occurred. */
#define VBOXGUEST_WAITEVENT_OK (0)
/** Successful completion, timed out. */
#define VBOXGUEST_WAITEVENT_TIMEOUT (1)
/** Wait was interrupted. */
#define VBOXGUEST_WAITEVENT_INTERRUPTED (2)
/** An error occurred while processing the request. */
#define VBOXGUEST_WAITEVENT_ERROR (3)
/** @} */
/** Input and output buffers layout of the IOCTL_VBOXGUEST_WAITEVENT */
typedef struct VBoxGuestWaitEventInfo
{
/** timeout in milliseconds */
uint32_t u32TimeoutIn;
/** events to wait for */
uint32_t u32EventMaskIn;
/** result code */
uint32_t u32Result;
/** events occurred */
uint32_t u32EventFlagsOut;
} VBoxGuestWaitEventInfo;
AssertCompileSize(VBoxGuestWaitEventInfo, 16);
/** IOCTL to VBoxGuest to perform a VMM request
* @remark The data buffer for this IOCtl has an variable size, keep this in mind
* on systems where this matters. */
#define VBOXGUEST_IOCTL_VMMREQUEST(Size) VBOXGUEST_IOCTL_CODE_(3, (Size))
/** IOCTL to VBoxGuest to control event filter mask. */
#define VBOXGUEST_IOCTL_CTL_FILTER_MASK VBOXGUEST_IOCTL_CODE_(4, sizeof(VBoxGuestFilterMaskInfo))
/** Input and output buffer layout of the IOCTL_VBOXGUEST_CTL_FILTER_MASK. */
typedef struct VBoxGuestFilterMaskInfo
{
uint32_t u32OrMask;
uint32_t u32NotMask;
} VBoxGuestFilterMaskInfo;
AssertCompileSize(VBoxGuestFilterMaskInfo, 8);
#pragma pack()
/** IOCTL to VBoxGuest to interrupt (cancel) any pending WAITEVENTs and return.
* Handled inside the guest additions and not seen by the host at all.
* @see VBOXGUEST_IOCTL_WAITEVENT */
#define VBOXGUEST_IOCTL_CANCEL_ALL_WAITEVENTS VBOXGUEST_IOCTL_CODE_(5, 0)
/** IOCTL to VBoxGuest to perform backdoor logging.
* The argument is a string buffer of the specified size. */
#define VBOXGUEST_IOCTL_LOG(Size) VBOXGUEST_IOCTL_CODE_(6, (Size))
/** IOCTL to VBoxGuest to check memory ballooning.
* The guest kernel module / device driver will ask the host for the current size of
* the balloon and adjust the size. Or it will set fHandledInR0 = false and R3 is
* responsible for allocating memory and calling R0 (VBOXGUEST_IOCTL_CHANGE_BALLOON). */
#define VBOXGUEST_IOCTL_CHECK_BALLOON VBOXGUEST_IOCTL_CODE_(7, sizeof(VBoxGuestCheckBalloonInfo))
/** Output buffer layout of the VBOXGUEST_IOCTL_CHECK_BALLOON. */
typedef struct VBoxGuestCheckBalloonInfo
{
/** The size of the balloon in chunks of 1MB. */
uint32_t cBalloonChunks;
/** false = handled in R0, no further action required.
* true = allocate balloon memory in R3. */
uint32_t fHandleInR3;
} VBoxGuestCheckBalloonInfo;
AssertCompileSize(VBoxGuestCheckBalloonInfo, 8);
/** IOCTL to VBoxGuest to supply or revoke one chunk for ballooning.
* The guest kernel module / device driver will lock down supplied memory or
* unlock reclaimed memory and then forward the physical addresses of the
* changed balloon chunk to the host. */
#define VBOXGUEST_IOCTL_CHANGE_BALLOON VBOXGUEST_IOCTL_CODE_(8, sizeof(VBoxGuestChangeBalloonInfo))
/** Input buffer layout of the VBOXGUEST_IOCTL_CHANGE_BALLOON request.
* Information about a memory chunk used to inflate or deflate the balloon. */
typedef struct VBoxGuestChangeBalloonInfo
{
/** Address of the chunk. */
uint64_t u64ChunkAddr;
/** true = inflate, false = deflate. */
uint32_t fInflate;
/** Alignment padding. */
uint32_t u32Align;
} VBoxGuestChangeBalloonInfo;
AssertCompileSize(VBoxGuestChangeBalloonInfo, 16);
/** IOCTL to VBoxGuest to write guest core. */
#define VBOXGUEST_IOCTL_WRITE_CORE_DUMP VBOXGUEST_IOCTL_CODE(9, sizeof(VBoxGuestWriteCoreDump))
/** Input and output buffer layout of the VBOXGUEST_IOCTL_WRITE_CORE
* request. */
typedef struct VBoxGuestWriteCoreDump
{
/** Flags (reserved, MBZ). */
uint32_t fFlags;
} VBoxGuestWriteCoreDump;
AssertCompileSize(VBoxGuestWriteCoreDump, 4);
#ifdef VBOX_WITH_HGCM
/** IOCTL to VBoxGuest to connect to a HGCM service. */
# define VBOXGUEST_IOCTL_HGCM_CONNECT VBOXGUEST_IOCTL_CODE(16, sizeof(VBoxGuestHGCMConnectInfo))
/** IOCTL to VBoxGuest to disconnect from a HGCM service. */
# define VBOXGUEST_IOCTL_HGCM_DISCONNECT VBOXGUEST_IOCTL_CODE(17, sizeof(VBoxGuestHGCMDisconnectInfo))
/** IOCTL to VBoxGuest to make a call to a HGCM service.
* @see VBoxGuestHGCMCallInfo */
# define VBOXGUEST_IOCTL_HGCM_CALL(Size) VBOXGUEST_IOCTL_CODE(18, (Size))
/** IOCTL to VBoxGuest to make a timed call to a HGCM service. */
# define VBOXGUEST_IOCTL_HGCM_CALL_TIMED(Size) VBOXGUEST_IOCTL_CODE(20, (Size))
# ifdef RT_ARCH_AMD64
/** @name IOCTL numbers that 32-bit clients, like the Windows OpenGL guest
* driver, will use when taking to a 64-bit driver.
* @remarks These are only used by the driver implementation! */
# define VBOXGUEST_IOCTL_HGCM_CONNECT_32 VBOXGUEST_IOCTL_CODE_32(16, sizeof(VBoxGuestHGCMConnectInfo))
# define VBOXGUEST_IOCTL_HGCM_DISCONNECT_32 VBOXGUEST_IOCTL_CODE_32(17, sizeof(VBoxGuestHGCMDisconnectInfo))
# define VBOXGUEST_IOCTL_HGCM_CALL_32(Size) VBOXGUEST_IOCTL_CODE_32(18, (Size))
# define VBOXGUEST_IOCTL_HGCM_CALL_TIMED_32(Size) VBOXGUEST_IOCTL_CODE_32(20, (Size))
/** @} */
# endif /* RT_ARCH_AMD64 */
/** Get the pointer to the first HGCM parameter. */
# define VBOXGUEST_HGCM_CALL_PARMS(a) ( (HGCMFunctionParameter *)((uint8_t *)(a) + sizeof(VBoxGuestHGCMCallInfo)) )
/** Get the pointer to the first HGCM parameter in a 32-bit request. */
# define VBOXGUEST_HGCM_CALL_PARMS32(a) ( (HGCMFunctionParameter32 *)((uint8_t *)(a) + sizeof(VBoxGuestHGCMCallInfo)) )
/** IOCTL to VBoxGuest to make a connect to the clipboard service.
* @todo Seems this is no longer is use. Try remove it. */
# define VBOXGUEST_IOCTL_CLIPBOARD_CONNECT VBOXGUEST_IOCTL_CODE_(19, sizeof(uint32_t))
#endif /* VBOX_WITH_HGCM */
#ifdef RT_OS_OS2
/**
* The data buffer layout for the IDC entry point (AttachDD).
*
* @remark This is defined in multiple 16-bit headers / sources.
* Some places it's called VBGOS2IDC to short things a bit.
*/
typedef struct VBOXGUESTOS2IDCCONNECT
{
/** VMMDEV_VERSION. */
uint32_t u32Version;
/** Opaque session handle. */
uint32_t u32Session;
/**
* The 32-bit service entry point.
*
* @returns VBox status code.
* @param u32Session The above session handle.
* @param iFunction The requested function.
* @param pvData The input/output data buffer. The caller ensures that this
* cannot be swapped out, or that it's acceptable to take a
* page in fault in the current context. If the request doesn't
* take input or produces output, apssing NULL is okay.
* @param cbData The size of the data buffer.
* @param pcbDataReturned Where to store the amount of data that's returned.
* This can be NULL if pvData is NULL.
*/
DECLCALLBACKMEMBER(int, pfnServiceEP)(uint32_t u32Session, unsigned iFunction, void *pvData, size_t cbData, size_t *pcbDataReturned);
/** The 16-bit service entry point for C code (cdecl).
*
* It's the same as the 32-bit entry point, but the types has
* changed to 16-bit equivalents.
*
* @code
* int far cdecl
* VBoxGuestOs2IDCService16(uint32_t u32Session, uint16_t iFunction,
* void far *fpvData, uint16_t cbData, uint16_t far *pcbDataReturned);
* @endcode
*/
RTFAR16 fpfnServiceEP;
/** The 16-bit service entry point for Assembly code (register).
*
* This is just a wrapper around fpfnServiceEP to simplify calls
* from 16-bit assembly code.
*
* @returns (e)ax: VBox status code; cx: The amount of data returned.
*
* @param u32Session eax - The above session handle.
* @param iFunction dl - The requested function.
* @param pvData es:bx - The input/output data buffer.
* @param cbData cx - The size of the data buffer.
*/
RTFAR16 fpfnServiceAsmEP;
} VBOXGUESTOS2IDCCONNECT;
/** Pointer to VBOXGUESTOS2IDCCONNECT buffer. */
typedef VBOXGUESTOS2IDCCONNECT *PVBOXGUESTOS2IDCCONNECT;
/** OS/2 specific: IDC client disconnect request.
*
* This takes no input and it doesn't return anything. Obviously this
* is only recognized if it arrives thru the IDC service EP.
*/
# define VBOXGUEST_IOCTL_OS2_IDC_DISCONNECT VBOXGUEST_IOCTL_CODE(48, sizeof(uint32_t))
#endif /* RT_OS_OS2 */
/** @} */
#endif /* !defined(IN_RC) && !defined(IN_RING0_AGNOSTIC) && !defined(IPRT_NO_CRT) */
#endif