| 1 | /* $Id: VBoxGuestInternal.h 38598 2011-09-01 13:14:53Z vboxsync $ */
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| 2 | /** @file
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| 3 | * VBoxGuest - Guest Additions Driver.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2010 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | */
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| 17 |
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| 18 | #ifndef ___VBoxGuestInternal_h
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| 19 | #define ___VBoxGuestInternal_h
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| 20 |
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| 21 | #include <iprt/types.h>
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| 22 | #include <iprt/list.h>
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| 23 | #include <iprt/semaphore.h>
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| 24 | #include <iprt/spinlock.h>
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| 25 | #include <VBox/VMMDev.h>
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| 26 | #include <VBox/VBoxGuest.h>
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| 27 | #include <VBox/VBoxGuestLib.h>
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| 28 |
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| 29 | /** @def VBOXGUEST_USE_WAKE_UP_LIST
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| 30 | * Defer wake-up of waiting thread when defined. */
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| 31 | #if defined(RT_OS_SOLARIS) || defined(RT_OS_WINDOWS) || defined(DOXYGEN_RUNNING)
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| 32 | # define VBOXGUEST_USE_DEFERRED_WAKE_UP
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| 33 | #endif
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| 34 |
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| 35 |
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| 36 | /** Pointer to the VBoxGuest per session data. */
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| 37 | typedef struct VBOXGUESTSESSION *PVBOXGUESTSESSION;
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| 38 |
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| 39 | /** Pointer to a wait-for-event entry. */
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| 40 | typedef struct VBOXGUESTWAIT *PVBOXGUESTWAIT;
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| 41 |
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| 42 | /**
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| 43 | * VBox guest wait for event entry.
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| 44 | *
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| 45 | * Each waiting thread allocates one of these items and adds
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| 46 | * it to the wait list before going to sleep on the event sem.
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| 47 | */
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| 48 | typedef struct VBOXGUESTWAIT
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| 49 | {
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| 50 | /** The list node. */
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| 51 | RTLISTNODE ListNode;
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| 52 | /** The events we are waiting on. */
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| 53 | uint32_t fReqEvents;
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| 54 | /** The events we received. */
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| 55 | uint32_t volatile fResEvents;
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| 56 | #ifdef VBOXGUEST_USE_DEFERRED_WAKE_UP
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| 57 | /** Set by VBoxGuestWaitDoWakeUps before leaving the spinlock to call
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| 58 | * RTSemEventMultiSignal. */
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| 59 | bool volatile fPendingWakeUp;
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| 60 | /** Set by the requestor thread if it got the spinlock before the
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| 61 | * signaller. Deals with the race in VBoxGuestWaitDoWakeUps. */
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| 62 | bool volatile fFreeMe;
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| 63 | #endif
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| 64 | /** The event semaphore. */
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| 65 | RTSEMEVENTMULTI Event;
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| 66 | /** The session that's waiting. */
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| 67 | PVBOXGUESTSESSION pSession;
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| 68 | #ifdef VBOX_WITH_HGCM
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| 69 | /** The HGCM request we're waiting for to complete. */
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| 70 | VMMDevHGCMRequestHeader volatile *pHGCMReq;
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| 71 | #endif
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| 72 | } VBOXGUESTWAIT;
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| 73 |
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| 74 |
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| 75 | /**
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| 76 | * VBox guest memory balloon.
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| 77 | */
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| 78 | typedef struct VBOXGUESTMEMBALLOON
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| 79 | {
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| 80 | /** Mutex protecting the members below from concurrent access.. */
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| 81 | RTSEMFASTMUTEX hMtx;
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| 82 | /** The current number of chunks in the balloon. */
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| 83 | uint32_t cChunks;
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| 84 | /** The maximum number of chunks in the balloon (typically the amount of guest
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| 85 | * memory / chunksize). */
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| 86 | uint32_t cMaxChunks;
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| 87 | /** This is true if we are using RTR0MemObjAllocPhysNC() / RTR0MemObjGetPagePhysAddr()
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| 88 | * and false otherwise. */
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| 89 | bool fUseKernelAPI;
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| 90 | /** The current owner of the balloon.
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| 91 | * This is automatically assigned to the first session using the ballooning
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| 92 | * API and first released when the session closes. */
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| 93 | PVBOXGUESTSESSION pOwner;
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| 94 | /** The pointer to the array of memory objects holding the chunks of the
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| 95 | * balloon. This array is cMaxChunks in size when present. */
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| 96 | PRTR0MEMOBJ paMemObj;
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| 97 | } VBOXGUESTMEMBALLOON;
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| 98 | /** Pointer to a memory balloon. */
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| 99 | typedef VBOXGUESTMEMBALLOON *PVBOXGUESTMEMBALLOON;
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| 100 |
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| 101 |
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| 102 | /**
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| 103 | * VBox guest device (data) extension.
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| 104 | */
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| 105 | typedef struct VBOXGUESTDEVEXT
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| 106 | {
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| 107 | /** The base of the adapter I/O ports. */
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| 108 | RTIOPORT IOPortBase;
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| 109 | /** Pointer to the mapping of the VMMDev adapter memory. */
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| 110 | VMMDevMemory volatile *pVMMDevMemory;
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| 111 | /** Events we won't permit anyone to filter out. */
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| 112 | uint32_t fFixedEvents;
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| 113 | /** The memory object reserving space for the guest mappings. */
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| 114 | RTR0MEMOBJ hGuestMappings;
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| 115 |
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| 116 | /** Spinlock protecting the signaling and resetting of the wait-for-event
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| 117 | * semaphores as well as the event acking in the ISR. */
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| 118 | RTSPINLOCK EventSpinlock;
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| 119 | /** Preallocated VMMDevEvents for the IRQ handler. */
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| 120 | VMMDevEvents *pIrqAckEvents;
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| 121 | /** The physical address of pIrqAckEvents. */
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| 122 | RTCCPHYS PhysIrqAckEvents;
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| 123 | /** Wait-for-event list for threads waiting for multiple events. */
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| 124 | RTLISTNODE WaitList;
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| 125 | #ifdef VBOX_WITH_HGCM
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| 126 | /** Wait-for-event list for threads waiting on HGCM async completion.
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| 127 | * The entire list is evaluated upon the arrival of an HGCM event, unlike
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| 128 | * the other lists which are only evaluated till the first thread has been woken up. */
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| 129 | RTLISTNODE HGCMWaitList;
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| 130 | #endif
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| 131 | #ifdef VBOXGUEST_USE_DEFERRED_WAKE_UP
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| 132 | /** List of wait-for-event entries that needs waking up. */
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| 133 | RTLISTNODE WakeUpList;
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| 134 | #endif
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| 135 | /** List of wait-for-event entries that has been woken up. */
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| 136 | RTLISTNODE WokenUpList;
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| 137 | /** List of free wait-for-event entries. */
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| 138 | RTLISTNODE FreeList;
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| 139 | /** Mask of pending events. */
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| 140 | uint32_t volatile f32PendingEvents;
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| 141 | /** Current VMMDEV_EVENT_MOUSE_POSITION_CHANGED sequence number.
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| 142 | * Used to implement polling. */
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| 143 | uint32_t volatile u32MousePosChangedSeq;
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| 144 |
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| 145 | /** Spinlock various items in the VBOXGUESTSESSION. */
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| 146 | RTSPINLOCK SessionSpinlock;
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| 147 |
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| 148 | /** The current clipboard client ID, 0 if no client.
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| 149 | * For implementing the VBOXGUEST_IOCTL_CLIPBOARD_CONNECT interface. */
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| 150 | uint32_t u32ClipboardClientId;
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| 151 | #ifdef VBOX_WITH_VRDP_SESSION_HANDLING
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| 152 | BOOL fVRDPEnabled;
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| 153 | #endif
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| 154 | /** Memory balloon information for RTR0MemObjAllocPhysNC(). */
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| 155 | VBOXGUESTMEMBALLOON MemBalloon;
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| 156 | /** For each mouse status feature the number of sessions which have
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| 157 | * enabled it. A feature is enabled globally if at least one session has
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| 158 | * requested it. */
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| 159 | /** @todo can we programmatically determine the size of the array and
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| 160 | * still get the following alignment right? */
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| 161 | uint32_t volatile cMouseFeatureUsage[32];
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| 162 | /** The mouse feature status matching the counts above. These are updated
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| 163 | * together inside the session spinlock. */
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| 164 | uint32_t volatile fMouseStatus;
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| 165 | /** Align the next bit on a 64-byte boundary and make sure it starts at the same
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| 166 | * offset in both 64-bit and 32-bit builds.
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| 167 | *
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| 168 | * @remarks The alignments of the members that are larger than 48 bytes should be
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| 169 | * 64-byte for cache line reasons. structs containing small amounts of
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| 170 | * data could be lumped together at the end with a < 64 byte padding
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| 171 | * following it (to grow into and align the struct size).
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| 172 | */
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| 173 | #if HC_ARCH_BITS == 32 /* Disabled for now to prevent a zero-sized array. */
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| 174 | uint8_t abAlignment1[HC_ARCH_BITS == 32 ? 20 : 0];
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| 175 | #endif
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| 176 |
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| 177 | /** Windows part. */
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| 178 | union
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| 179 | {
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| 180 | #ifdef ___VBoxGuest_win_h
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| 181 | VBOXGUESTDEVEXTWIN s;
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| 182 | #endif
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| 183 | uint8_t padding[256]; /* Multiple of 64; fix me! */
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| 184 | } win;
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| 185 |
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| 186 | } VBOXGUESTDEVEXT;
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| 187 | /** Pointer to the VBoxGuest driver data. */
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| 188 | typedef VBOXGUESTDEVEXT *PVBOXGUESTDEVEXT;
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| 189 |
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| 190 | AssertCompileMemberSizeAlignment(VBOXGUESTDEVEXT, win, 64);
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| 191 |
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| 192 | /**
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| 193 | * The VBoxGuest per session data.
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| 194 | *
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| 195 | * @remark Not quite sure whether this will be useful or not, but since
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| 196 | * its already there let's keep it for now in case it might come
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| 197 | * in handy later.
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| 198 | */
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| 199 | typedef struct VBOXGUESTSESSION
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| 200 | {
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| 201 | #if defined(RT_OS_OS2) || defined(RT_OS_FREEBSD) || defined(RT_OS_SOLARIS)
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| 202 | /** Pointer to the next session with the same hash. */
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| 203 | PVBOXGUESTSESSION pNextHash;
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| 204 | #endif
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| 205 | #if defined(RT_OS_OS2)
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| 206 | /** The system file number of this session. */
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| 207 | uint16_t sfn;
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| 208 | uint16_t Alignment; /**< Alignment */
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| 209 | #endif
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| 210 | /** The process (id) of the session.
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| 211 | * This is NIL if it's a kernel session. */
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| 212 | RTPROCESS Process;
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| 213 | /** Which process this session is associated with.
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| 214 | * This is NIL if it's a kernel session. */
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| 215 | RTR0PROCESS R0Process;
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| 216 | /** Pointer to the device extension. */
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| 217 | PVBOXGUESTDEVEXT pDevExt;
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| 218 |
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| 219 | #ifdef VBOX_WITH_HGCM
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| 220 | /** Array containing HGCM client IDs associated with this session.
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| 221 | * This will be automatically disconnected when the session is closed. */
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| 222 | uint32_t volatile aHGCMClientIds[64];
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| 223 | #endif
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| 224 | /** The last consumed VMMDEV_EVENT_MOUSE_POSITION_CHANGED sequence number.
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| 225 | * Used to implement polling. */
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| 226 | uint32_t volatile u32MousePosChangedSeq;
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| 227 | /** Mouse features supported. A feature enabled in any guest session will
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| 228 | * be enabled for the host. */
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| 229 | uint32_t volatile fMouseStatus;
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| 230 |
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| 231 | } VBOXGUESTSESSION;
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| 232 |
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| 233 | RT_C_DECLS_BEGIN
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| 234 |
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| 235 | int VBoxGuestInitDevExt(PVBOXGUESTDEVEXT pDevExt, uint16_t IOPortBase, void *pvMMIOBase, uint32_t cbMMIO, VBOXOSTYPE enmOSType, uint32_t fEvents);
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| 236 | bool VBoxGuestCommonISR(PVBOXGUESTDEVEXT pDevExt);
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| 237 | void VBoxGuestDeleteDevExt(PVBOXGUESTDEVEXT pDevExt);
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| 238 | int VBoxGuestReinitDevExtAfterHibernation(PVBOXGUESTDEVEXT pDevExt, VBOXOSTYPE enmOSType);
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| 239 | int VBoxGuestSetGuestCapabilities(uint32_t fOr, uint32_t fNot);
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| 240 | #ifdef VBOXGUEST_USE_DEFERRED_WAKE_UP
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| 241 | void VBoxGuestWaitDoWakeUps(PVBOXGUESTDEVEXT pDevExt);
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| 242 | #endif
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| 243 |
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| 244 | int VBoxGuestCreateUserSession(PVBOXGUESTDEVEXT pDevExt, PVBOXGUESTSESSION *ppSession);
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| 245 | int VBoxGuestCreateKernelSession(PVBOXGUESTDEVEXT pDevExt, PVBOXGUESTSESSION *ppSession);
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| 246 | void VBoxGuestCloseSession(PVBOXGUESTDEVEXT pDevExt, PVBOXGUESTSESSION pSession);
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| 247 |
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| 248 | int VBoxGuestCommonIOCtlFast(unsigned iFunction, PVBOXGUESTDEVEXT pDevExt, PVBOXGUESTSESSION pSession);
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| 249 | int VBoxGuestCommonIOCtl(unsigned iFunction, PVBOXGUESTDEVEXT pDevExt, PVBOXGUESTSESSION pSession,
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| 250 | void *pvData, size_t cbData, size_t *pcbDataReturned);
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| 251 |
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| 252 | #if defined(RT_OS_SOLARIS) \
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| 253 | || defined(RT_OS_FREEBSD) \
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| 254 | || defined(RT_OS_LINUX)
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| 255 | DECLVBGL(void *) VBoxGuestNativeServiceOpen(uint32_t *pu32Version);
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| 256 | DECLVBGL(void) VBoxGuestNativeServiceClose(void *pvOpaque);
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| 257 | DECLVBGL(int) VBoxGuestNativeServiceCall(void *pvOpaque, unsigned int iCmd, void *pvData, size_t cbSize, size_t *pcbReturn);
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| 258 | #endif
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| 259 |
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| 260 | /**
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| 261 | * ISR callback for notifying threads polling for mouse events.
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| 262 | *
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| 263 | * This is called at the end of the ISR, after leaving the event spinlock, if
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| 264 | * VMMDEV_EVENT_MOUSE_POSITION_CHANGED was raised by the host.
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| 265 | *
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| 266 | * @param pDevExt The device extension.
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| 267 | */
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| 268 | void VBoxGuestNativeISRMousePollEvent(PVBOXGUESTDEVEXT pDevExt);
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| 269 |
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| 270 | RT_C_DECLS_END
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| 271 |
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| 272 | #endif
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| 273 |
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