| 1 | /** @file
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| 2 | *
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| 3 | * VBoxGuestLib - A support library for VirtualBox guest additions:
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| 4 | * Generic VMMDev request management
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| 5 | */
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| 6 |
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| 7 | /*
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| 8 | * Copyright (C) 2006 InnoTek Systemberatung GmbH
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| 9 | *
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| 10 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 11 | * available from http://www.virtualbox.org. This file is free software;
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| 12 | * you can redistribute it and/or modify it under the terms of the GNU
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| 13 | * General Public License as published by the Free Software Foundation,
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| 14 | * in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
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| 15 | * distribution. VirtualBox OSE is distributed in the hope that it will
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| 16 | * be useful, but WITHOUT ANY WARRANTY of any kind.
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| 17 | *
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| 18 | * If you received this file as part of a commercial VirtualBox
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| 19 | * distribution, then only the terms of your commercial VirtualBox
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| 20 | * license agreement apply instead of the previous paragraph.
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| 21 | */
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| 22 |
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| 23 | #include <VBox/VBoxGuestLib.h>
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| 24 | #include "VBGLInternal.h"
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| 25 | #include <iprt/asm.h>
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| 26 | #include <iprt/string.h>
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| 27 |
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| 28 | DECLVBGL(int) VbglGRAlloc (VMMDevRequestHeader **ppReq, uint32_t cbSize, VMMDevRequestType reqType)
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| 29 | {
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| 30 | int rc = VbglEnter ();
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| 31 | VMMDevRequestHeader *pReq;
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| 32 |
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| 33 | if (VBOX_FAILURE(rc))
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| 34 | return rc;
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| 35 |
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| 36 | if (!ppReq || cbSize < sizeof (VMMDevRequestHeader))
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| 37 | {
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| 38 | dprintf(("VbglGRAlloc: Invalid parameter: ppReq = %p, cbSize = %d\n", ppReq, cbSize));
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| 39 | return VERR_INVALID_PARAMETER;
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| 40 | }
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| 41 |
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| 42 | pReq = (VMMDevRequestHeader *)VbglPhysHeapAlloc (cbSize);
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| 43 | if (!pReq)
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| 44 | {
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| 45 | dprintf(("VbglGRAlloc: no memory\n"));
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| 46 | rc = VERR_NO_MEMORY;
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| 47 | }
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| 48 | else
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| 49 | {
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| 50 | memset(pReq, 0xAA, cbSize);
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| 51 |
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| 52 | pReq->size = cbSize;
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| 53 | pReq->version = VMMDEV_REQUEST_HEADER_VERSION;
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| 54 | pReq->requestType = reqType;
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| 55 | pReq->rc = VERR_GENERAL_FAILURE;
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| 56 | pReq->reserved1 = 0;
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| 57 | pReq->reserved2 = 0;
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| 58 |
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| 59 | *ppReq = pReq;
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| 60 | }
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| 61 |
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| 62 | return rc;
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| 63 | }
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| 64 |
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| 65 | DECLVBGL(int) VbglGRPerform (VMMDevRequestHeader *pReq)
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| 66 | {
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| 67 | RTCCPHYS physaddr;
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| 68 | int rc = VbglEnter ();
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| 69 |
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| 70 | if (VBOX_FAILURE(rc))
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| 71 | return rc;
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| 72 |
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| 73 | if (!pReq)
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| 74 | return VERR_INVALID_PARAMETER;
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| 75 |
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| 76 | if (g_vbgldata.portVMMDev == 0)
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| 77 | return VERR_VBGL_NOT_INITIALIZED;
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| 78 |
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| 79 | physaddr = VbglPhysHeapGetPhysAddr (pReq);
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| 80 | if (!physaddr)
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| 81 | {
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| 82 | rc = VERR_VBGL_INVALID_ADDR;
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| 83 | }
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| 84 | else
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| 85 | {
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| 86 | ASMOutU32(g_vbgldata.portVMMDev + PORT_VMMDEV_REQUEST_OFFSET, (uint32_t)physaddr);
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| 87 | /* Make the compiler aware that the host has changed memory. */
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| 88 | ASMCompilerBarrier();
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| 89 | rc = pReq->rc;
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| 90 | }
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| 91 | return rc;
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| 92 | }
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| 93 |
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| 94 | DECLVBGL(void) VbglGRFree (VMMDevRequestHeader *pReq)
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| 95 | {
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| 96 | int rc = VbglEnter ();
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| 97 |
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| 98 | if (VBOX_FAILURE(rc))
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| 99 | return;
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| 100 |
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| 101 | VbglPhysHeapFree (pReq);
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| 102 | }
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