| 1 | /* $Id: vscsi.h 38680 2011-09-08 07:52:08Z vboxsync $ */
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| 2 | /** @file
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| 3 | * VBox storage drivers: Virtual SCSI driver
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2011 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 | * The contents of this file may alternatively be used under the terms
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| 18 | * of the Common Development and Distribution License Version 1.0
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| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | * VirtualBox OSE distribution, in which case the provisions of the
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| 21 | * CDDL are applicable instead of those of the GPL.
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| 22 | *
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| 23 | * You may elect to license modified versions of this file under the
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| 24 | * terms and conditions of either the GPL or the CDDL or both.
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| 25 | */
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| 26 |
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| 27 | #ifndef ___VBox_vscsi_h
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| 28 | #define ___VBox_vscsi_h
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| 29 |
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| 30 | #include <VBox/cdefs.h>
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| 31 | #include <VBox/types.h>
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| 32 | #include <iprt/sg.h>
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| 33 |
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| 34 | RT_C_DECLS_BEGIN
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| 35 |
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| 36 | #ifdef IN_RING0
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| 37 | # error "There are no VBox VSCSI APIs available in Ring-0 Host Context!"
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| 38 | #endif
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| 39 |
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| 40 | /** A virtual SCSI device handle */
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| 41 | typedef struct VSCSIDEVICEINT *VSCSIDEVICE;
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| 42 | /** A pointer to a virtual SCSI device handle. */
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| 43 | typedef VSCSIDEVICE *PVSCSIDEVICE;
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| 44 | /** A virtual SCSI LUN handle. */
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| 45 | typedef struct VSCSILUNINT *VSCSILUN;
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| 46 | /** A pointer to a virtual SCSI LUN handle. */
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| 47 | typedef VSCSILUN *PVSCSILUN;
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| 48 | /** A virtual SCSI request handle. */
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| 49 | typedef struct VSCSIREQINT *VSCSIREQ;
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| 50 | /** A pointer to a virtual SCSI request handle. */
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| 51 | typedef VSCSIREQ *PVSCSIREQ;
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| 52 | /** A SCSI I/O request handle. */
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| 53 | typedef struct VSCSIIOREQINT *VSCSIIOREQ;
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| 54 | /** A pointer to a SCSI I/O request handle. */
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| 55 | typedef VSCSIIOREQ *PVSCSIIOREQ;
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| 56 |
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| 57 | /**
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| 58 | * Virtual SCSI I/O request transfer direction.
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| 59 | */
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| 60 | typedef enum VSCSIIOREQTXDIR
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| 61 | {
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| 62 | /** Invalid direction */
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| 63 | VSCSIIOREQTXDIR_INVALID = 0,
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| 64 | /** Read */
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| 65 | VSCSIIOREQTXDIR_READ,
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| 66 | /** Write */
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| 67 | VSCSIIOREQTXDIR_WRITE,
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| 68 | /** Flush */
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| 69 | VSCSIIOREQTXDIR_FLUSH,
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| 70 | /** Unmap */
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| 71 | VSCSIIOREQTXDIR_UNMAP,
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| 72 | /** 32bit hack */
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| 73 | VSCSIIOREQTXDIR_32BIT_HACK = 0x7fffffff
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| 74 | } VSCSIIOREQTXDIR;
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| 75 | /** Pointer to a SCSI LUN type */
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| 76 | typedef VSCSIIOREQTXDIR *PVSCSIIOREQTXDIR;
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| 77 |
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| 78 | /**
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| 79 | * LUN types we support
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| 80 | */
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| 81 | typedef enum VSCSILUNTYPE
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| 82 | {
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| 83 | /** Invalid type */
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| 84 | VSCSILUNTYPE_INVALID = 0,
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| 85 | /** Hard disk (SBC) */
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| 86 | VSCSILUNTYPE_SBC,
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| 87 | /** CD/DVD drive (MMC) */
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| 88 | VSCSILUNTYPE_MMC,
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| 89 | /** Last value to indicate an invalid device */
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| 90 | VSCSILUNTYPE_LAST,
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| 91 | /** 32bit hack */
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| 92 | VSCSILUNTYPE_32BIT_HACK = 0x7fffffff
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| 93 | } VSCSILUNTYPE;
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| 94 | /** Pointer to a SCSI LUN type */
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| 95 | typedef VSCSILUNTYPE *PVSCSILUNTYPE;
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| 96 |
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| 97 | /**
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| 98 | * Range descriptor.
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| 99 | */
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| 100 | typedef struct VSCSIRANGE
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| 101 | {
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| 102 | /** Start offset. */
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| 103 | uint64_t offStart;
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| 104 | /** Size of the range. */
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| 105 | size_t cbRange;
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| 106 | } VSCSIRANGE;
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| 107 | /** Pointer to a range descriptor. */
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| 108 | typedef VSCSIRANGE *PVSCSIRANGE;
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| 109 |
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| 110 | /** The LUN can handle the UNMAP command. */
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| 111 | #define VSCSI_LUN_FEATURE_UNMAP RT_BIT(0)
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| 112 | /** The LUN has a non rotational medium. */
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| 113 | #define VSCSI_LUN_FEATURE_NON_ROTATIONAL RT_BIT(1)
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| 114 |
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| 115 | /**
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| 116 | * Virtual SCSI LUN I/O Callback table.
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| 117 | */
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| 118 | typedef struct VSCSILUNIOCALLBACKS
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| 119 | {
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| 120 | /**
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| 121 | * Retrieve the size of the underlying medium.
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| 122 | *
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| 123 | * @returns VBox status status code.
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| 124 | * @param hVScsiLun Virtual SCSI LUN handle.
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| 125 | * @param pvScsiLunUser Opaque user data which may
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| 126 | * be used to identify the medium.
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| 127 | * @param pcbSize Where to store the size of the
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| 128 | * medium.
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| 129 | */
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| 130 | DECLR3CALLBACKMEMBER(int, pfnVScsiLunMediumGetSize, (VSCSILUN hVScsiLun,
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| 131 | void *pvScsiLunUser,
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| 132 | uint64_t *pcbSize));
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| 133 |
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| 134 | /**
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| 135 | * Enqueue a read or write request from the medium.
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| 136 | *
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| 137 | * @returns VBox status status code.
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| 138 | * @param hVScsiLun Virtual SCSI LUN handle.
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| 139 | * @param pvScsiLunUser Opaque user data which may
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| 140 | * be used to identify the medium.
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| 141 | * @param hVScsiIoReq Virtual SCSI I/O request handle.
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| 142 | */
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| 143 | DECLR3CALLBACKMEMBER(int, pfnVScsiLunReqTransferEnqueue, (VSCSILUN hVScsiLun,
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| 144 | void *pvScsiLunUser,
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| 145 | VSCSIIOREQ hVScsiIoReq));
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| 146 |
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| 147 | /**
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| 148 | * Returns flags of supported features.
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| 149 | *
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| 150 | * @returns VBox status status code.
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| 151 | * @param hVScsiLun Virtual SCSI LUN handle.
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| 152 | * @param pvScsiLunUser Opaque user data which may
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| 153 | * be used to identify the medium.
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| 154 | * @param hVScsiIoReq Virtual SCSI I/O request handle.
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| 155 | */
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| 156 | DECLR3CALLBACKMEMBER(int, pfnVScsiLunGetFeatureFlags, (VSCSILUN hVScsiLun,
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| 157 | void *pvScsiLunUser,
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| 158 | uint64_t *pfFeatures));
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| 159 |
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| 160 |
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| 161 | } VSCSILUNIOCALLBACKS;
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| 162 | /** Pointer to a virtual SCSI LUN I/O callback table. */
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| 163 | typedef VSCSILUNIOCALLBACKS *PVSCSILUNIOCALLBACKS;
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| 164 |
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| 165 | /**
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| 166 | * The virtual SCSI request completed callback.
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| 167 | */
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| 168 | typedef DECLCALLBACK(void) FNVSCSIREQCOMPLETED(VSCSIDEVICE hVScsiDevice,
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| 169 | void *pvVScsiDeviceUser,
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| 170 | void *pvVScsiReqUser,
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| 171 | int rcScsiCode,
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| 172 | bool fRedoPossible,
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| 173 | int rcReq);
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| 174 | /** Pointer to a virtual SCSI request completed callback. */
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| 175 | typedef FNVSCSIREQCOMPLETED *PFNVSCSIREQCOMPLETED;
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| 176 |
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| 177 | /**
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| 178 | * Create a new empty SCSI device instance.
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| 179 | *
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| 180 | * @returns VBox status code.
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| 181 | * @param phVScsiDevice Where to store the SCSI device handle.
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| 182 | * @param pfnVScsiReqCompleted The method call after a request completed.
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| 183 | * @param pvVScsiDeviceUser Opaque user data given in the completion callback.
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| 184 | */
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| 185 | VBOXDDU_DECL(int) VSCSIDeviceCreate(PVSCSIDEVICE phVScsiDevice,
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| 186 | PFNVSCSIREQCOMPLETED pfnVScsiReqCompleted,
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| 187 | void *pvVScsiDeviceUser);
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| 188 |
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| 189 | /**
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| 190 | * Destroy a SCSI device instance.
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| 191 | *
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| 192 | * @returns VBox status code.
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| 193 | * @param hScsiDevice The SCSI device handle to destroy.
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| 194 | */
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| 195 | VBOXDDU_DECL(int) VSCSIDeviceDestroy(VSCSIDEVICE hVScsiDevice);
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| 196 |
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| 197 | /**
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| 198 | * Attach a LUN to the SCSI device.
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| 199 | *
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| 200 | * @returns VBox status code.
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| 201 | * @param hScsiDevice The SCSI device handle to add the LUN to.
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| 202 | * @param hScsiLun The LUN handle to add.
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| 203 | * @param iLun The LUN number.
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| 204 | */
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| 205 | VBOXDDU_DECL(int) VSCSIDeviceLunAttach(VSCSIDEVICE hVScsiDevice, VSCSILUN hVScsiLun, uint32_t iLun);
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| 206 |
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| 207 | /**
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| 208 | * Detach a LUN from the SCSI device.
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| 209 | *
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| 210 | * @returns VBox status code.
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| 211 | * @param hVScsiDevice The SCSI device handle to add the LUN to.
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| 212 | * @param iLun The LUN number to remove.
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| 213 | * @param phVScsiLun Where to store the detached LUN handle.
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| 214 | */
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| 215 | VBOXDDU_DECL(int) VSCSIDeviceLunDetach(VSCSIDEVICE hVScsiDevice, uint32_t iLun,
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| 216 | PVSCSILUN phVScsiLun);
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| 217 |
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| 218 | /**
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| 219 | * Return the SCSI LUN handle.
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| 220 | *
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| 221 | * @returns VBox status code.
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| 222 | * @param hVScsiDevice The SCSI device handle.
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| 223 | * @param iLun The LUN number to get.
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| 224 | * @param phVScsiLun Where to store the LUN handle.
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| 225 | */
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| 226 | VBOXDDU_DECL(int) VSCSIDeviceLunGet(VSCSIDEVICE hVScsiDevice, uint32_t iLun,
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| 227 | PVSCSILUN phVScsiLun);
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| 228 |
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| 229 | /**
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| 230 | * Enqueue a request to the SCSI device.
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| 231 | *
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| 232 | * @returns VBox status code.
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| 233 | * @param hVScsiDevice The SCSI device handle.
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| 234 | * @param hVScsiReq The SCSI request handle to enqueue.
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| 235 | */
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| 236 | VBOXDDU_DECL(int) VSCSIDeviceReqEnqueue(VSCSIDEVICE hVScsiDevice, VSCSIREQ hVScsiReq);
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| 237 |
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| 238 | /**
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| 239 | * Allocate a new request handle.
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| 240 | *
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| 241 | * @returns VBox status code.
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| 242 | * @param phVScsiDevice The SCSI device handle.
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| 243 | * @param phVScsiReq Where to SCSI request handle.
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| 244 | * @param iLun The LUN the request is for.
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| 245 | * @param pbCDB The CDB for the request.
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| 246 | * @param cbCDB The size of the CDB in bytes.
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| 247 | * @param cbSGList Number of bytes the S/G list describes.
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| 248 | * @param cSGListEntries Number of S/G list entries.
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| 249 | * @param paSGList Pointer to the S/G list.
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| 250 | * @param pbSense Pointer to the sense buffer.
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| 251 | * @param cbSense Size of the sense buffer.
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| 252 | * @param pvVScsiReqUser Opqaue user data returned when the request completes.
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| 253 | */
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| 254 | VBOXDDU_DECL(int) VSCSIDeviceReqCreate(VSCSIDEVICE hVScsiDevice, PVSCSIREQ phVScsiReq,
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| 255 | uint32_t iLun, uint8_t *pbCDB, size_t cbCDB,
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| 256 | size_t cbSGList, unsigned cSGListEntries,
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| 257 | PCRTSGSEG paSGList, uint8_t *pbSense,
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| 258 | size_t cbSense, void *pvVScsiReqUser);
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| 259 |
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| 260 | /**
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| 261 | * Create a new LUN.
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| 262 | *
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| 263 | * @returns VBox status code.
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| 264 | * @param phVScsiLun Where to store the SCSI LUN handle.
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| 265 | * @param enmLunType The Lun type.
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| 266 | * @param pVScsiLunIoCallbacks Pointer to the I/O callbacks to use for his LUN.
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| 267 | * @param pvVScsiLunUser Opaque user argument which
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| 268 | * is returned in the pvScsiLunUser parameter
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| 269 | * when the request completion callback is called.
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| 270 | */
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| 271 | VBOXDDU_DECL(int) VSCSILunCreate(PVSCSILUN phVScsiLun, VSCSILUNTYPE enmLunType,
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| 272 | PVSCSILUNIOCALLBACKS pVScsiLunIoCallbacks,
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| 273 | void *pvVScsiLunUser);
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| 274 |
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| 275 | /**
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| 276 | * Destroy virtual SCSI LUN.
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| 277 | *
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| 278 | * @returns VBox status code.
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| 279 | * @param hVScsiLun The virtual SCSI LUN handle to destroy.
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| 280 | */
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| 281 | VBOXDDU_DECL(int) VSCSILunDestroy(VSCSILUN hVScsiLun);
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| 282 |
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| 283 | /**
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| 284 | * Notify a that a I/O request completed.
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| 285 | *
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| 286 | * @returns VBox status code.
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| 287 | * @param hVScsiIoReq The I/O request handle that completed.
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| 288 | * This is given when a I/O callback for
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| 289 | * the LUN is called by the virtual SCSI layer.
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| 290 | * @param rcIoReq The status code the I/O request completed with.
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| 291 | * @param fRedoPossible Flag whether it is possible to redo the request.
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| 292 | * If true setting any sense code will be omitted
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| 293 | * in case of an error to not alter the device state.
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| 294 | */
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| 295 | VBOXDDU_DECL(int) VSCSIIoReqCompleted(VSCSIIOREQ hVScsiIoReq, int rcIoReq, bool fRedoPossible);
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| 296 |
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| 297 | /**
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| 298 | * Query the transfer direction of the I/O request.
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| 299 | *
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| 300 | * @returns Transfer direction.of the given I/O request
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| 301 | * @param hVScsiIoReq The SCSI I/O request handle.
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| 302 | */
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| 303 | VBOXDDU_DECL(VSCSIIOREQTXDIR) VSCSIIoReqTxDirGet(VSCSIIOREQ hVScsiIoReq);
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| 304 |
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| 305 | /**
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| 306 | * Query I/O parameters.
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| 307 | *
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| 308 | * @returns VBox status code.
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| 309 | * @param hVScsiIoReq The SCSI I/O request handle.
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| 310 | * @param puOffset Where to store the start offset.
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| 311 | * @param pcbTransfer Where to store the amount of bytes to transfer.
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| 312 | * @param pcSeg Where to store the number of segments in the S/G list.
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| 313 | * @param pcbSeg Where to store the number of bytes the S/G list describes.
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| 314 | * @param ppaSeg Where to store the pointer to the S/G list.
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| 315 | */
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| 316 | VBOXDDU_DECL(int) VSCSIIoReqParamsGet(VSCSIIOREQ hVScsiIoReq, uint64_t *puOffset,
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| 317 | size_t *pcbTransfer, unsigned *pcSeg,
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| 318 | size_t *pcbSeg, PCRTSGSEG *ppaSeg);
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| 319 |
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| 320 | /**
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| 321 | * Query unmap parameters.
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| 322 | *
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| 323 | * @returns VBox status code.
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| 324 | * @param hVScsiIoReq The SCSI I/O request handle.
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| 325 | * @param ppaRanges Where to store the pointer to the range array on success.
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| 326 | * @param pcRanges Where to store the number of ranges on success.
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| 327 | */
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| 328 | VBOXDDU_DECL(int) VSCSIIoReqUnmapParamsGet(VSCSIIOREQ hVScsiIoReq, PVSCSIRANGE *ppaRanges,
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| 329 | unsigned *pcRanges);
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| 330 |
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| 331 | RT_C_DECLS_END
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| 332 |
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| 333 | #endif /* ___VBox_vscsi_h */
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| 334 |
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