1 | /* $Id: DrvSCSI.cpp 35353 2010-12-27 17:25:52Z vboxsync $ */
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2 | /** @file
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3 | * VBox storage drivers: Generic SCSI command parser and execution driver
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2006-2010 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 | /*******************************************************************************
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19 | * Header Files *
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20 | *******************************************************************************/
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21 | //#define DEBUG
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22 | #define LOG_GROUP LOG_GROUP_DRV_SCSI
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23 | #include <VBox/vmm/pdmdrv.h>
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24 | #include <VBox/vmm/pdmifs.h>
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25 | #include <VBox/vmm/pdmthread.h>
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26 | #include <VBox/vscsi.h>
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27 | #include <VBox/scsi.h>
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28 | #include <iprt/asm.h>
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29 | #include <iprt/assert.h>
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30 | #include <iprt/mem.h>
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31 | #include <iprt/req.h>
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32 | #include <iprt/semaphore.h>
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33 | #include <iprt/string.h>
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34 | #include <iprt/uuid.h>
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35 |
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36 | #include "VBoxDD.h"
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37 |
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38 | /** The maximum number of release log entries per device. */
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39 | #define MAX_LOG_REL_ERRORS 1024
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40 |
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41 | /**
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42 | * SCSI driver instance data.
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43 | *
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44 | * @implements PDMISCSICONNECTOR
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45 | * @implements PDMIBLOCKASYNCPORT
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46 | * @implements PDMIMOUNTNOTIFY
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47 | */
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48 | typedef struct DRVSCSI
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49 | {
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50 | /** Pointer driver instance. */
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51 | PPDMDRVINS pDrvIns;
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52 |
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53 | /** Pointer to the attached driver's base interface. */
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54 | PPDMIBASE pDrvBase;
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55 | /** Pointer to the attached driver's block interface. */
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56 | PPDMIBLOCK pDrvBlock;
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57 | /** Pointer to the attached driver's async block interface. */
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58 | PPDMIBLOCKASYNC pDrvBlockAsync;
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59 | /** Pointer to the attached driver's block bios interface. */
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60 | PPDMIBLOCKBIOS pDrvBlockBios;
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61 | /** Pointer to the attached driver's mount interface. */
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62 | PPDMIMOUNT pDrvMount;
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63 | /** Pointer to the SCSI port interface of the device above. */
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64 | PPDMISCSIPORT pDevScsiPort;
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65 | /** pointer to the Led port interface of the dveice above. */
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66 | PPDMILEDPORTS pLedPort;
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67 | /** The scsi connector interface .*/
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68 | PDMISCSICONNECTOR ISCSIConnector;
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69 | /** The block port interface. */
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70 | PDMIBLOCKPORT IPort;
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71 | /** The optional block async port interface. */
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72 | PDMIBLOCKASYNCPORT IPortAsync;
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73 | #if 0 /* these interfaces aren't implemented */
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74 | /** The mount notify interface. */
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75 | PDMIMOUNTNOTIFY IMountNotify;
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76 | #endif
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77 | /** Fallback status LED state for this drive.
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78 | * This is used in case the device doesn't has a LED interface. */
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79 | PDMLED Led;
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80 | /** Pointer to the status LED for this drive. */
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81 | PPDMLED pLed;
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82 |
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83 | /** VSCSI device handle. */
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84 | VSCSIDEVICE hVScsiDevice;
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85 | /** VSCSI LUN handle. */
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86 | VSCSILUN hVScsiLun;
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87 | /** I/O callbacks. */
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88 | VSCSILUNIOCALLBACKS VScsiIoCallbacks;
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89 |
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90 | /** The dedicated I/O thread for the non async approach. */
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91 | PPDMTHREAD pAsyncIOThread;
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92 | /** Queue for passing the requests to the thread. */
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93 | PRTREQQUEUE pQueueRequests;
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94 | /** Request that we've left pending on wakeup or reset. */
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95 | PRTREQ pPendingDummyReq;
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96 | /** Indicates whether PDMDrvHlpAsyncNotificationCompleted should be called by
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97 | * any of the dummy functions. */
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98 | bool volatile fDummySignal;
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99 | /** Release statistics: number of bytes written. */
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100 | STAMCOUNTER StatBytesWritten;
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101 | /** Release statistics: number of bytes read. */
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102 | STAMCOUNTER StatBytesRead;
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103 | /** Release statistics: Current I/O depth. */
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104 | volatile uint32_t StatIoDepth;
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105 | /** Errors printed in the release log. */
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106 | unsigned cErrors;
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107 | } DRVSCSI, *PDRVSCSI;
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108 |
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109 | /** Converts a pointer to DRVSCSI::ISCSIConnector to a PDRVSCSI. */
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110 | #define PDMISCSICONNECTOR_2_DRVSCSI(pInterface) ( (PDRVSCSI)((uintptr_t)pInterface - RT_OFFSETOF(DRVSCSI, ISCSIConnector)) )
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111 | /** Converts a pointer to DRVSCSI::IPortAsync to a PDRVSCSI. */
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112 | #define PDMIBLOCKASYNCPORT_2_DRVSCSI(pInterface) ( (PDRVSCSI)((uintptr_t)pInterface - RT_OFFSETOF(DRVSCSI, IPortAsync)) )
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113 | /** Converts a pointer to DRVSCSI::IPort to a PDRVSCSI. */
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114 | #define PDMIBLOCKPORT_2_DRVSCSI(pInterface) ( (PDRVSCSI)((uintptr_t)pInterface - RT_OFFSETOF(DRVSCSI, IPort)) )
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115 |
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116 | static bool drvscsiIsRedoPossible(int rc)
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117 | {
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118 | if ( rc == VERR_DISK_FULL
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119 | || rc == VERR_FILE_TOO_BIG
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120 | || rc == VERR_BROKEN_PIPE
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121 | || rc == VERR_NET_CONNECTION_REFUSED)
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122 | return true;
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123 |
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124 | return false;
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125 | }
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126 |
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127 | static int drvscsiProcessRequestOne(PDRVSCSI pThis, VSCSIIOREQ hVScsiIoReq)
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128 | {
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129 | int rc = VINF_SUCCESS;
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130 | VSCSIIOREQTXDIR enmTxDir;
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131 |
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132 | enmTxDir = VSCSIIoReqTxDirGet(hVScsiIoReq);
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133 |
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134 | switch (enmTxDir)
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135 | {
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136 | case VSCSIIOREQTXDIR_FLUSH:
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137 | {
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138 | rc = pThis->pDrvBlock->pfnFlush(pThis->pDrvBlock);
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139 | break;
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140 | }
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141 | case VSCSIIOREQTXDIR_READ:
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142 | case VSCSIIOREQTXDIR_WRITE:
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143 | {
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144 | uint64_t uOffset = 0;
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145 | size_t cbTransfer = 0;
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146 | size_t cbSeg = 0;
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147 | PCRTSGSEG paSeg = NULL;
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148 | unsigned cSeg = 0;
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149 |
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150 | rc = VSCSIIoReqParamsGet(hVScsiIoReq, &uOffset, &cbTransfer, &cSeg, &cbSeg,
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151 | &paSeg);
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152 | AssertRC(rc);
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153 |
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154 | while (cbTransfer && cSeg)
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155 | {
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156 | size_t cbProcess = (cbTransfer < paSeg->cbSeg) ? cbTransfer : paSeg->cbSeg;
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157 |
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158 | Log(("%s: uOffset=%llu cbProcess=%u\n", __FUNCTION__, uOffset, cbProcess));
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159 |
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160 | if (enmTxDir == VSCSIIOREQTXDIR_READ)
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161 | {
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162 | pThis->pLed->Asserted.s.fReading = pThis->pLed->Actual.s.fReading = 1;
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163 | rc = pThis->pDrvBlock->pfnRead(pThis->pDrvBlock, uOffset,
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164 | paSeg->pvSeg, cbProcess);
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165 | pThis->pLed->Actual.s.fReading = 0;
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166 | if (RT_FAILURE(rc))
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167 | break;
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168 | STAM_REL_COUNTER_ADD(&pThis->StatBytesRead, cbProcess);
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169 | }
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170 | else
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171 | {
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172 | pThis->pLed->Asserted.s.fWriting = pThis->pLed->Actual.s.fWriting = 1;
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173 | rc = pThis->pDrvBlock->pfnWrite(pThis->pDrvBlock, uOffset,
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174 | paSeg->pvSeg, cbProcess);
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175 | pThis->pLed->Actual.s.fWriting = 0;
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176 | if (RT_FAILURE(rc))
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177 | break;
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178 | STAM_REL_COUNTER_ADD(&pThis->StatBytesWritten, cbProcess);
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179 | }
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180 |
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181 | /* Go to the next entry. */
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182 | uOffset += cbProcess;
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183 | cbTransfer -= cbProcess;
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184 | paSeg++;
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185 | cSeg--;
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186 | }
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187 |
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188 | break;
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189 | }
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190 | default:
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191 | AssertMsgFailed(("Invalid transfer direction %d\n", enmTxDir));
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192 | }
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193 |
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194 | if (RT_SUCCESS(rc))
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195 | VSCSIIoReqCompleted(hVScsiIoReq, rc, false /* fRedoPossible */);
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196 | else
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197 | VSCSIIoReqCompleted(hVScsiIoReq, rc, drvscsiIsRedoPossible(rc));
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198 |
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199 | return VINF_SUCCESS;
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200 | }
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201 |
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202 | static int drvscsiGetSize(VSCSILUN hVScsiLun, void *pvScsiLunUser, uint64_t *pcbSize)
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203 | {
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204 | PDRVSCSI pThis = (PDRVSCSI)pvScsiLunUser;
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205 |
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206 | *pcbSize = pThis->pDrvBlock->pfnGetSize(pThis->pDrvBlock);
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207 |
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208 | return VINF_SUCCESS;
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209 | }
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210 |
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211 | static int drvscsiTransferCompleteNotify(PPDMIBLOCKASYNCPORT pInterface, void *pvUser, int rc)
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212 | {
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213 | PDRVSCSI pThis = PDMIBLOCKASYNCPORT_2_DRVSCSI(pInterface);
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214 | VSCSIIOREQ hVScsiIoReq = (VSCSIIOREQ)pvUser;
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215 | VSCSIIOREQTXDIR enmTxDir = VSCSIIoReqTxDirGet(hVScsiIoReq);
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216 |
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217 | LogFlowFunc(("Request hVScsiIoReq=%#p completed\n", hVScsiIoReq));
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218 |
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219 | if (enmTxDir == VSCSIIOREQTXDIR_READ)
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220 | pThis->pLed->Actual.s.fReading = 0;
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221 | else if (enmTxDir == VSCSIIOREQTXDIR_WRITE)
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222 | pThis->pLed->Actual.s.fWriting = 0;
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223 | else
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224 | AssertMsg(enmTxDir == VSCSIIOREQTXDIR_FLUSH, ("Invalid transfer direction %u\n", enmTxDir));
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225 |
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226 | if (RT_SUCCESS(rc))
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227 | VSCSIIoReqCompleted(hVScsiIoReq, rc, false /* fRedoPossible */);
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228 | else
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229 | {
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230 | pThis->cErrors++;
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231 | if ( pThis->cErrors < MAX_LOG_REL_ERRORS
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232 | && enmTxDir == VSCSIIOREQTXDIR_FLUSH)
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233 | LogRel(("SCSI#%u: Flush returned rc=%Rrc\n",
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234 | pThis->pDrvIns->iInstance, rc));
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235 | else
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236 | {
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237 | uint64_t uOffset = 0;
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238 | size_t cbTransfer = 0;
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239 | size_t cbSeg = 0;
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240 | PCRTSGSEG paSeg = NULL;
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241 | unsigned cSeg = 0;
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242 |
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243 | VSCSIIoReqParamsGet(hVScsiIoReq, &uOffset, &cbTransfer,
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244 | &cSeg, &cbSeg, &paSeg);
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245 |
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246 | LogRel(("SCSI#%u: %s at offset %llu (%u bytes left) returned rc=%Rrc\n",
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247 | pThis->pDrvIns->iInstance,
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248 | enmTxDir == VSCSIIOREQTXDIR_READ
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249 | ? "Read"
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250 | : "Write",
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251 | uOffset,
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252 | cbTransfer, rc));
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253 | }
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254 |
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255 | VSCSIIoReqCompleted(hVScsiIoReq, rc, drvscsiIsRedoPossible(rc));
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256 | }
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257 |
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258 | return VINF_SUCCESS;
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259 | }
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260 |
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261 | static int drvscsiReqTransferEnqueue(VSCSILUN hVScsiLun,
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262 | void *pvScsiLunUser,
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263 | VSCSIIOREQ hVScsiIoReq)
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264 | {
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265 | int rc = VINF_SUCCESS;
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266 | PDRVSCSI pThis = (PDRVSCSI)pvScsiLunUser;
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267 |
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268 | if (pThis->pDrvBlockAsync)
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269 | {
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270 | /* async I/O path. */
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271 | VSCSIIOREQTXDIR enmTxDir;
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272 |
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273 | LogFlowFunc(("Enqueuing hVScsiIoReq=%#p\n", hVScsiIoReq));
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274 |
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275 | enmTxDir = VSCSIIoReqTxDirGet(hVScsiIoReq);
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276 |
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277 | switch (enmTxDir)
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278 | {
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279 | case VSCSIIOREQTXDIR_FLUSH:
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280 | {
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281 | rc = pThis->pDrvBlockAsync->pfnStartFlush(pThis->pDrvBlockAsync, hVScsiIoReq);
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282 | if ( RT_FAILURE(rc)
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283 | && rc != VERR_VD_ASYNC_IO_IN_PROGRESS
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284 | && pThis->cErrors++ < MAX_LOG_REL_ERRORS)
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285 | LogRel(("SCSI#%u: Flush returned rc=%Rrc\n",
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286 | pThis->pDrvIns->iInstance, rc));
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287 | break;
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288 | }
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289 | case VSCSIIOREQTXDIR_READ:
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290 | case VSCSIIOREQTXDIR_WRITE:
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291 | {
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292 | uint64_t uOffset = 0;
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293 | size_t cbTransfer = 0;
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294 | size_t cbSeg = 0;
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295 | PCRTSGSEG paSeg = NULL;
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296 | unsigned cSeg = 0;
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297 |
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298 | rc = VSCSIIoReqParamsGet(hVScsiIoReq, &uOffset, &cbTransfer,
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299 | &cSeg, &cbSeg, &paSeg);
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300 | AssertRC(rc);
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301 |
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302 | if (enmTxDir == VSCSIIOREQTXDIR_READ)
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303 | {
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304 | pThis->pLed->Asserted.s.fReading = pThis->pLed->Actual.s.fReading = 1;
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305 | rc = pThis->pDrvBlockAsync->pfnStartRead(pThis->pDrvBlockAsync, uOffset,
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306 | paSeg, cSeg, cbTransfer,
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307 | hVScsiIoReq);
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308 | STAM_REL_COUNTER_ADD(&pThis->StatBytesRead, cbTransfer);
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309 | }
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310 | else
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311 | {
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312 | pThis->pLed->Asserted.s.fWriting = pThis->pLed->Actual.s.fWriting = 1;
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313 | rc = pThis->pDrvBlockAsync->pfnStartWrite(pThis->pDrvBlockAsync, uOffset,
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314 | paSeg, cSeg, cbTransfer,
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315 | hVScsiIoReq);
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316 | STAM_REL_COUNTER_ADD(&pThis->StatBytesWritten, cbTransfer);
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317 | }
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318 |
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319 | if ( RT_FAILURE(rc)
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320 | && rc != VERR_VD_ASYNC_IO_IN_PROGRESS
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321 | && pThis->cErrors++ < MAX_LOG_REL_ERRORS)
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322 | LogRel(("SCSI#%u: %s at offset %llu (%u bytes left) returned rc=%Rrc\n",
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323 | pThis->pDrvIns->iInstance,
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324 | enmTxDir == VSCSIIOREQTXDIR_READ
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325 | ? "Read"
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326 | : "Write",
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327 | uOffset,
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328 | cbTransfer, rc));
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329 | break;
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330 | }
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331 | default:
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332 | AssertMsgFailed(("Invalid transfer direction %u\n", enmTxDir));
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333 | }
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334 |
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335 | if (rc == VINF_VD_ASYNC_IO_FINISHED)
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336 | {
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337 | if (enmTxDir == VSCSIIOREQTXDIR_READ)
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338 | pThis->pLed->Actual.s.fReading = 0;
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339 | else if (enmTxDir == VSCSIIOREQTXDIR_WRITE)
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340 | pThis->pLed->Actual.s.fWriting = 0;
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341 | else
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342 | AssertMsg(enmTxDir == VSCSIIOREQTXDIR_FLUSH, ("Invalid transfer direction %u\n", enmTxDir));
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343 |
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344 | VSCSIIoReqCompleted(hVScsiIoReq, VINF_SUCCESS, false);
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345 | rc = VINF_SUCCESS;
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346 | }
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347 | else if (rc == VERR_VD_ASYNC_IO_IN_PROGRESS)
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348 | rc = VINF_SUCCESS;
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349 | else if (RT_FAILURE(rc))
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350 | {
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351 | if (enmTxDir == VSCSIIOREQTXDIR_READ)
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352 | pThis->pLed->Actual.s.fReading = 0;
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353 | else if (enmTxDir == VSCSIIOREQTXDIR_WRITE)
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354 | pThis->pLed->Actual.s.fWriting = 0;
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355 | else
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356 | AssertMsg(enmTxDir == VSCSIIOREQTXDIR_FLUSH, ("Invalid transfer direction %u\n", enmTxDir));
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357 |
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358 | VSCSIIoReqCompleted(hVScsiIoReq, rc, drvscsiIsRedoPossible(rc));
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359 | rc = VINF_SUCCESS;
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360 | }
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361 | else
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362 | AssertMsgFailed(("Invalid return code rc=%Rrc\n", rc));
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363 | }
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364 | else
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365 | {
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366 | /* I/O thread. */
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367 | rc = RTReqCallEx(pThis->pQueueRequests, NULL, 0, RTREQFLAGS_NO_WAIT,
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368 | (PFNRT)drvscsiProcessRequestOne, 2, pThis, hVScsiIoReq);
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369 | }
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370 |
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371 | return rc;
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372 | }
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373 |
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374 | static void drvscsiVScsiReqCompleted(VSCSIDEVICE hVScsiDevice, void *pVScsiDeviceUser,
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375 | void *pVScsiReqUser, int rcScsiCode, bool fRedoPossible,
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376 | int rcReq)
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377 | {
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378 | PDRVSCSI pThis = (PDRVSCSI)pVScsiDeviceUser;
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379 |
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380 | ASMAtomicDecU32(&pThis->StatIoDepth);
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381 |
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382 | pThis->pDevScsiPort->pfnSCSIRequestCompleted(pThis->pDevScsiPort, (PPDMSCSIREQUEST)pVScsiReqUser,
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383 | rcScsiCode, fRedoPossible, rcReq);
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384 |
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385 | if (RT_UNLIKELY(pThis->fDummySignal) && !pThis->StatIoDepth)
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386 | PDMDrvHlpAsyncNotificationCompleted(pThis->pDrvIns);
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387 | }
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388 |
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389 | /**
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390 | * Dummy request function used by drvscsiReset to wait for all pending requests
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391 | * to complete prior to the device reset.
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392 | *
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393 | * @param pThis Pointer to the instance data.
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394 | * @returns VINF_SUCCESS.
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395 | */
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396 | static int drvscsiAsyncIOLoopSyncCallback(PDRVSCSI pThis)
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397 | {
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398 | if (pThis->fDummySignal)
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399 | PDMDrvHlpAsyncNotificationCompleted(pThis->pDrvIns);
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400 | return VINF_SUCCESS;
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401 | }
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402 |
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403 | /**
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404 | * Request function to wakeup the thread.
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405 | *
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406 | * @param pThis Pointer to the instance data.
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407 | * @returns VWRN_STATE_CHANGED.
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408 | */
|
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409 | static int drvscsiAsyncIOLoopWakeupFunc(PDRVSCSI pThis)
|
---|
410 | {
|
---|
411 | if (pThis->fDummySignal)
|
---|
412 | PDMDrvHlpAsyncNotificationCompleted(pThis->pDrvIns);
|
---|
413 | return VWRN_STATE_CHANGED;
|
---|
414 | }
|
---|
415 |
|
---|
416 | /**
|
---|
417 | * The thread function which processes the requests asynchronously.
|
---|
418 | *
|
---|
419 | * @returns VBox status code.
|
---|
420 | * @param pDrvIns Pointer to the driver instance data.
|
---|
421 | * @param pThread Pointer to the thread instance data.
|
---|
422 | */
|
---|
423 | static int drvscsiAsyncIOLoop(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
|
---|
424 | {
|
---|
425 | int rc = VINF_SUCCESS;
|
---|
426 | PDRVSCSI pThis = PDMINS_2_DATA(pDrvIns, PDRVSCSI);
|
---|
427 |
|
---|
428 | LogFlowFunc(("Entering async IO loop.\n"));
|
---|
429 |
|
---|
430 | if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
|
---|
431 | return VINF_SUCCESS;
|
---|
432 |
|
---|
433 | while (pThread->enmState == PDMTHREADSTATE_RUNNING)
|
---|
434 | {
|
---|
435 | rc = RTReqProcess(pThis->pQueueRequests, RT_INDEFINITE_WAIT);
|
---|
436 | AssertMsg(rc == VWRN_STATE_CHANGED, ("Left RTReqProcess and error code is not VWRN_STATE_CHANGED rc=%Rrc\n", rc));
|
---|
437 | }
|
---|
438 |
|
---|
439 | return VINF_SUCCESS;
|
---|
440 | }
|
---|
441 |
|
---|
442 | /**
|
---|
443 | * Deals with any pending dummy request
|
---|
444 | *
|
---|
445 | * @returns true if no pending dummy request, false if still pending.
|
---|
446 | * @param pThis The instance data.
|
---|
447 | * @param cMillies The number of milliseconds to wait for any
|
---|
448 | * pending request to finish.
|
---|
449 | */
|
---|
450 | static bool drvscsiAsyncIOLoopNoPendingDummy(PDRVSCSI pThis, uint32_t cMillies)
|
---|
451 | {
|
---|
452 | if (!pThis->pPendingDummyReq)
|
---|
453 | return true;
|
---|
454 | int rc = RTReqWait(pThis->pPendingDummyReq, cMillies);
|
---|
455 | if (RT_FAILURE(rc))
|
---|
456 | return false;
|
---|
457 | RTReqFree(pThis->pPendingDummyReq);
|
---|
458 | pThis->pPendingDummyReq = NULL;
|
---|
459 | return true;
|
---|
460 | }
|
---|
461 |
|
---|
462 | static int drvscsiAsyncIOLoopWakeup(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
|
---|
463 | {
|
---|
464 | PDRVSCSI pThis = PDMINS_2_DATA(pDrvIns, PDRVSCSI);
|
---|
465 | PRTREQ pReq;
|
---|
466 | int rc;
|
---|
467 |
|
---|
468 | AssertMsgReturn(pThis->pQueueRequests, ("pQueueRequests is NULL\n"), VERR_INVALID_STATE);
|
---|
469 |
|
---|
470 | if (!drvscsiAsyncIOLoopNoPendingDummy(pThis, 10000 /* 10 sec */))
|
---|
471 | {
|
---|
472 | LogRel(("drvscsiAsyncIOLoopWakeup#%u: previous dummy request is still pending\n", pDrvIns->iInstance));
|
---|
473 | return VERR_TIMEOUT;
|
---|
474 | }
|
---|
475 |
|
---|
476 | rc = RTReqCall(pThis->pQueueRequests, &pReq, 10000 /* 10 sec. */, (PFNRT)drvscsiAsyncIOLoopWakeupFunc, 1, pThis);
|
---|
477 | if (RT_SUCCESS(rc))
|
---|
478 | RTReqFree(pReq);
|
---|
479 | else
|
---|
480 | {
|
---|
481 | pThis->pPendingDummyReq = pReq;
|
---|
482 | LogRel(("drvscsiAsyncIOLoopWakeup#%u: %Rrc pReq=%p\n", pDrvIns->iInstance, rc, pReq));
|
---|
483 | }
|
---|
484 |
|
---|
485 | return rc;
|
---|
486 | }
|
---|
487 |
|
---|
488 | /* -=-=-=-=- ISCSIConnector -=-=-=-=- */
|
---|
489 |
|
---|
490 | #ifdef DEBUG
|
---|
491 | /**
|
---|
492 | * Dumps a SCSI request structure for debugging purposes.
|
---|
493 | *
|
---|
494 | * @returns nothing.
|
---|
495 | * @param pRequest Pointer to the request to dump.
|
---|
496 | */
|
---|
497 | static void drvscsiDumpScsiRequest(PPDMSCSIREQUEST pRequest)
|
---|
498 | {
|
---|
499 | Log(("Dump for pRequest=%#p Command: %s\n", pRequest, SCSICmdText(pRequest->pbCDB[0])));
|
---|
500 | Log(("cbCDB=%u\n", pRequest->cbCDB));
|
---|
501 | for (uint32_t i = 0; i < pRequest->cbCDB; i++)
|
---|
502 | Log(("pbCDB[%u]=%#x\n", i, pRequest->pbCDB[i]));
|
---|
503 | Log(("cbScatterGather=%u\n", pRequest->cbScatterGather));
|
---|
504 | Log(("cScatterGatherEntries=%u\n", pRequest->cScatterGatherEntries));
|
---|
505 | /* Print all scatter gather entries. */
|
---|
506 | for (uint32_t i = 0; i < pRequest->cScatterGatherEntries; i++)
|
---|
507 | {
|
---|
508 | Log(("ScatterGatherEntry[%u].cbSeg=%u\n", i, pRequest->paScatterGatherHead[i].cbSeg));
|
---|
509 | Log(("ScatterGatherEntry[%u].pvSeg=%#p\n", i, pRequest->paScatterGatherHead[i].pvSeg));
|
---|
510 | }
|
---|
511 | Log(("pvUser=%#p\n", pRequest->pvUser));
|
---|
512 | }
|
---|
513 | #endif
|
---|
514 |
|
---|
515 | /** @copydoc PDMISCSICONNECTOR::pfnSCSIRequestSend. */
|
---|
516 | static DECLCALLBACK(int) drvscsiRequestSend(PPDMISCSICONNECTOR pInterface, PPDMSCSIREQUEST pSCSIRequest)
|
---|
517 | {
|
---|
518 | int rc;
|
---|
519 | PDRVSCSI pThis = PDMISCSICONNECTOR_2_DRVSCSI(pInterface);
|
---|
520 | VSCSIREQ hVScsiReq;
|
---|
521 |
|
---|
522 | #ifdef DEBUG
|
---|
523 | drvscsiDumpScsiRequest(pSCSIRequest);
|
---|
524 | #endif
|
---|
525 |
|
---|
526 | rc = VSCSIDeviceReqCreate(pThis->hVScsiDevice, &hVScsiReq,
|
---|
527 | pSCSIRequest->uLogicalUnit,
|
---|
528 | pSCSIRequest->pbCDB,
|
---|
529 | pSCSIRequest->cbCDB,
|
---|
530 | pSCSIRequest->cbScatterGather,
|
---|
531 | pSCSIRequest->cScatterGatherEntries,
|
---|
532 | pSCSIRequest->paScatterGatherHead,
|
---|
533 | pSCSIRequest->pbSenseBuffer,
|
---|
534 | pSCSIRequest->cbSenseBuffer,
|
---|
535 | pSCSIRequest);
|
---|
536 | if (RT_FAILURE(rc))
|
---|
537 | return rc;
|
---|
538 |
|
---|
539 | ASMAtomicIncU32(&pThis->StatIoDepth);
|
---|
540 | rc = VSCSIDeviceReqEnqueue(pThis->hVScsiDevice, hVScsiReq);
|
---|
541 |
|
---|
542 | return rc;
|
---|
543 | }
|
---|
544 |
|
---|
545 | /* -=-=-=-=- IBase -=-=-=-=- */
|
---|
546 |
|
---|
547 | /**
|
---|
548 | * @interface_method_impl{PDMIBASE,pfnQueryInterface}
|
---|
549 | */
|
---|
550 | static DECLCALLBACK(void *) drvscsiQueryInterface(PPDMIBASE pInterface, const char *pszIID)
|
---|
551 | {
|
---|
552 | PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
|
---|
553 | PDRVSCSI pThis = PDMINS_2_DATA(pDrvIns, PDRVSCSI);
|
---|
554 |
|
---|
555 | PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase);
|
---|
556 | PDMIBASE_RETURN_INTERFACE(pszIID, PDMISCSICONNECTOR, &pThis->ISCSIConnector);
|
---|
557 | PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBLOCKPORT, &pThis->IPort);
|
---|
558 | PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBLOCKASYNCPORT, &pThis->IPortAsync);
|
---|
559 | return NULL;
|
---|
560 | }
|
---|
561 |
|
---|
562 | static DECLCALLBACK(int) drvscsiQueryDeviceLocation(PPDMIBLOCKPORT pInterface, const char **ppcszController,
|
---|
563 | uint32_t *piInstance, uint32_t *piLUN)
|
---|
564 | {
|
---|
565 | PDRVSCSI pThis = PDMIBLOCKPORT_2_DRVSCSI(pInterface);
|
---|
566 |
|
---|
567 | return pThis->pDevScsiPort->pfnQueryDeviceLocation(pThis->pDevScsiPort, ppcszController,
|
---|
568 | piInstance, piLUN);
|
---|
569 | }
|
---|
570 |
|
---|
571 | /**
|
---|
572 | * Worker for drvscsiReset, drvscsiSuspend and drvscsiPowerOff.
|
---|
573 | *
|
---|
574 | * @param pDrvIns The driver instance.
|
---|
575 | * @param pfnAsyncNotify The async callback.
|
---|
576 | */
|
---|
577 | static void drvscsiR3ResetOrSuspendOrPowerOff(PPDMDRVINS pDrvIns, PFNPDMDRVASYNCNOTIFY pfnAsyncNotify)
|
---|
578 | {
|
---|
579 | PDRVSCSI pThis = PDMINS_2_DATA(pDrvIns, PDRVSCSI);
|
---|
580 |
|
---|
581 | if (!pThis->pDrvBlockAsync)
|
---|
582 | {
|
---|
583 | if (!pThis->pQueueRequests)
|
---|
584 | return;
|
---|
585 |
|
---|
586 | ASMAtomicWriteBool(&pThis->fDummySignal, true);
|
---|
587 | if (drvscsiAsyncIOLoopNoPendingDummy(pThis, 0 /*ms*/))
|
---|
588 | {
|
---|
589 | if (!RTReqIsBusy(pThis->pQueueRequests))
|
---|
590 | {
|
---|
591 | ASMAtomicWriteBool(&pThis->fDummySignal, false);
|
---|
592 | return;
|
---|
593 | }
|
---|
594 |
|
---|
595 | PRTREQ pReq;
|
---|
596 | int rc = RTReqCall(pThis->pQueueRequests, &pReq, 0 /*ms*/, (PFNRT)drvscsiAsyncIOLoopSyncCallback, 1, pThis);
|
---|
597 | if (RT_SUCCESS(rc))
|
---|
598 | {
|
---|
599 | ASMAtomicWriteBool(&pThis->fDummySignal, false);
|
---|
600 | RTReqFree(pReq);
|
---|
601 | return;
|
---|
602 | }
|
---|
603 |
|
---|
604 | pThis->pPendingDummyReq = pReq;
|
---|
605 | }
|
---|
606 | }
|
---|
607 | else
|
---|
608 | {
|
---|
609 | if (pThis->StatIoDepth > 0)
|
---|
610 | {
|
---|
611 | ASMAtomicWriteBool(&pThis->fDummySignal, true);
|
---|
612 | }
|
---|
613 | return;
|
---|
614 | }
|
---|
615 |
|
---|
616 | PDMDrvHlpSetAsyncNotification(pDrvIns, pfnAsyncNotify);
|
---|
617 | }
|
---|
618 |
|
---|
619 | /**
|
---|
620 | * Callback employed by drvscsiSuspend and drvscsiPowerOff.
|
---|
621 | *
|
---|
622 | * @returns true if we've quiesced, false if we're still working.
|
---|
623 | * @param pDrvIns The driver instance.
|
---|
624 | */
|
---|
625 | static DECLCALLBACK(bool) drvscsiIsAsyncSuspendOrPowerOffDone(PPDMDRVINS pDrvIns)
|
---|
626 | {
|
---|
627 | PDRVSCSI pThis = PDMINS_2_DATA(pDrvIns, PDRVSCSI);
|
---|
628 |
|
---|
629 | if (pThis->pDrvBlockAsync)
|
---|
630 | {
|
---|
631 | if (pThis->StatIoDepth > 0)
|
---|
632 | return false;
|
---|
633 | else
|
---|
634 | return true;
|
---|
635 | }
|
---|
636 | else
|
---|
637 | {
|
---|
638 | if (!drvscsiAsyncIOLoopNoPendingDummy(pThis, 0 /*ms*/))
|
---|
639 | return false;
|
---|
640 | ASMAtomicWriteBool(&pThis->fDummySignal, false);
|
---|
641 | PDMR3ThreadSuspend(pThis->pAsyncIOThread);
|
---|
642 | return true;
|
---|
643 | }
|
---|
644 | }
|
---|
645 |
|
---|
646 | /**
|
---|
647 | * @copydoc FNPDMDRVPOWEROFF
|
---|
648 | */
|
---|
649 | static DECLCALLBACK(void) drvscsiPowerOff(PPDMDRVINS pDrvIns)
|
---|
650 | {
|
---|
651 | drvscsiR3ResetOrSuspendOrPowerOff(pDrvIns, drvscsiIsAsyncSuspendOrPowerOffDone);
|
---|
652 | }
|
---|
653 |
|
---|
654 | /**
|
---|
655 | * @copydoc FNPDMDRVSUSPEND
|
---|
656 | */
|
---|
657 | static DECLCALLBACK(void) drvscsiSuspend(PPDMDRVINS pDrvIns)
|
---|
658 | {
|
---|
659 | drvscsiR3ResetOrSuspendOrPowerOff(pDrvIns, drvscsiIsAsyncSuspendOrPowerOffDone);
|
---|
660 | }
|
---|
661 |
|
---|
662 | /**
|
---|
663 | * Callback employed by drvscsiReset.
|
---|
664 | *
|
---|
665 | * @returns true if we've quiesced, false if we're still working.
|
---|
666 | * @param pDrvIns The driver instance.
|
---|
667 | */
|
---|
668 | static DECLCALLBACK(bool) drvscsiIsAsyncResetDone(PPDMDRVINS pDrvIns)
|
---|
669 | {
|
---|
670 | PDRVSCSI pThis = PDMINS_2_DATA(pDrvIns, PDRVSCSI);
|
---|
671 |
|
---|
672 | if (pThis->pDrvBlockAsync)
|
---|
673 | {
|
---|
674 | if (pThis->StatIoDepth > 0)
|
---|
675 | return false;
|
---|
676 | else
|
---|
677 | return true;
|
---|
678 | }
|
---|
679 | else
|
---|
680 | {
|
---|
681 | if (!drvscsiAsyncIOLoopNoPendingDummy(pThis, 0 /*ms*/))
|
---|
682 | return false;
|
---|
683 | ASMAtomicWriteBool(&pThis->fDummySignal, false);
|
---|
684 | return true;
|
---|
685 | }
|
---|
686 | }
|
---|
687 |
|
---|
688 | /**
|
---|
689 | * @copydoc FNPDMDRVRESET
|
---|
690 | */
|
---|
691 | static DECLCALLBACK(void) drvscsiReset(PPDMDRVINS pDrvIns)
|
---|
692 | {
|
---|
693 | drvscsiR3ResetOrSuspendOrPowerOff(pDrvIns, drvscsiIsAsyncResetDone);
|
---|
694 | }
|
---|
695 |
|
---|
696 | /**
|
---|
697 | * Destruct a driver instance.
|
---|
698 | *
|
---|
699 | * Most VM resources are freed by the VM. This callback is provided so that any non-VM
|
---|
700 | * resources can be freed correctly.
|
---|
701 | *
|
---|
702 | * @param pDrvIns The driver instance data.
|
---|
703 | */
|
---|
704 | static DECLCALLBACK(void) drvscsiDestruct(PPDMDRVINS pDrvIns)
|
---|
705 | {
|
---|
706 | PDRVSCSI pThis = PDMINS_2_DATA(pDrvIns, PDRVSCSI);
|
---|
707 | PDMDRV_CHECK_VERSIONS_RETURN_VOID(pDrvIns);
|
---|
708 |
|
---|
709 | if (pThis->pQueueRequests)
|
---|
710 | {
|
---|
711 | if (!drvscsiAsyncIOLoopNoPendingDummy(pThis, 100 /*ms*/))
|
---|
712 | LogRel(("drvscsiDestruct#%u: previous dummy request is still pending\n", pDrvIns->iInstance));
|
---|
713 |
|
---|
714 | int rc = RTReqDestroyQueue(pThis->pQueueRequests);
|
---|
715 | AssertMsgRC(rc, ("Failed to destroy queue rc=%Rrc\n", rc));
|
---|
716 | }
|
---|
717 |
|
---|
718 | /* Free the VSCSI device and LUN handle. */
|
---|
719 | VSCSILUN hVScsiLun;
|
---|
720 | int rc = VSCSIDeviceLunDetach(pThis->hVScsiDevice, 0, &hVScsiLun);
|
---|
721 | AssertRC(rc);
|
---|
722 |
|
---|
723 | Assert(hVScsiLun == pThis->hVScsiLun);
|
---|
724 | rc = VSCSILunDestroy(hVScsiLun);
|
---|
725 | AssertRC(rc);
|
---|
726 | rc = VSCSIDeviceDestroy(pThis->hVScsiDevice);
|
---|
727 | AssertRC(rc);
|
---|
728 | }
|
---|
729 |
|
---|
730 | /**
|
---|
731 | * Construct a block driver instance.
|
---|
732 | *
|
---|
733 | * @copydoc FNPDMDRVCONSTRUCT
|
---|
734 | */
|
---|
735 | static DECLCALLBACK(int) drvscsiConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags)
|
---|
736 | {
|
---|
737 | int rc = VINF_SUCCESS;
|
---|
738 | PDRVSCSI pThis = PDMINS_2_DATA(pDrvIns, PDRVSCSI);
|
---|
739 | LogFlowFunc(("pDrvIns=%#p pCfg=%#p\n", pDrvIns, pCfg));
|
---|
740 | PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns);
|
---|
741 |
|
---|
742 | /*
|
---|
743 | * Initialize the instance data.
|
---|
744 | */
|
---|
745 | pThis->pDrvIns = pDrvIns;
|
---|
746 | pThis->ISCSIConnector.pfnSCSIRequestSend = drvscsiRequestSend;
|
---|
747 |
|
---|
748 | pDrvIns->IBase.pfnQueryInterface = drvscsiQueryInterface;
|
---|
749 |
|
---|
750 | pThis->IPort.pfnQueryDeviceLocation = drvscsiQueryDeviceLocation;
|
---|
751 | pThis->IPortAsync.pfnTransferCompleteNotify = drvscsiTransferCompleteNotify;
|
---|
752 |
|
---|
753 | /* Query the SCSI port interface above. */
|
---|
754 | pThis->pDevScsiPort = PDMIBASE_QUERY_INTERFACE(pDrvIns->pUpBase, PDMISCSIPORT);
|
---|
755 | AssertMsgReturn(pThis->pDevScsiPort, ("Missing SCSI port interface above\n"), VERR_PDM_MISSING_INTERFACE);
|
---|
756 |
|
---|
757 | /* Query the optional LED interface above. */
|
---|
758 | pThis->pLedPort = PDMIBASE_QUERY_INTERFACE(pDrvIns->pUpBase, PDMILEDPORTS);
|
---|
759 | if (pThis->pLedPort != NULL)
|
---|
760 | {
|
---|
761 | /* Get The Led. */
|
---|
762 | rc = pThis->pLedPort->pfnQueryStatusLed(pThis->pLedPort, 0, &pThis->pLed);
|
---|
763 | if (RT_FAILURE(rc))
|
---|
764 | pThis->pLed = &pThis->Led;
|
---|
765 | }
|
---|
766 | else
|
---|
767 | pThis->pLed = &pThis->Led;
|
---|
768 |
|
---|
769 | /*
|
---|
770 | * Try attach driver below and query it's block interface.
|
---|
771 | */
|
---|
772 | rc = PDMDrvHlpAttach(pDrvIns, fFlags, &pThis->pDrvBase);
|
---|
773 | AssertMsgReturn(RT_SUCCESS(rc), ("Attaching driver below failed rc=%Rrc\n", rc), rc);
|
---|
774 |
|
---|
775 | /*
|
---|
776 | * Query the block and blockbios interfaces.
|
---|
777 | */
|
---|
778 | pThis->pDrvBlock = PDMIBASE_QUERY_INTERFACE(pThis->pDrvBase, PDMIBLOCK);
|
---|
779 | if (!pThis->pDrvBlock)
|
---|
780 | {
|
---|
781 | AssertMsgFailed(("Configuration error: No block interface!\n"));
|
---|
782 | return VERR_PDM_MISSING_INTERFACE;
|
---|
783 | }
|
---|
784 | pThis->pDrvBlockBios = PDMIBASE_QUERY_INTERFACE(pThis->pDrvBase, PDMIBLOCKBIOS);
|
---|
785 | if (!pThis->pDrvBlockBios)
|
---|
786 | {
|
---|
787 | AssertMsgFailed(("Configuration error: No block BIOS interface!\n"));
|
---|
788 | return VERR_PDM_MISSING_INTERFACE;
|
---|
789 | }
|
---|
790 |
|
---|
791 | pThis->pDrvMount = PDMIBASE_QUERY_INTERFACE(pThis->pDrvBase, PDMIMOUNT);
|
---|
792 |
|
---|
793 | /* Try to get the optional async block interface. */
|
---|
794 | pThis->pDrvBlockAsync = PDMIBASE_QUERY_INTERFACE(pThis->pDrvBase, PDMIBLOCKASYNC);
|
---|
795 |
|
---|
796 | PDMBLOCKTYPE enmType = pThis->pDrvBlock->pfnGetType(pThis->pDrvBlock);
|
---|
797 | if (enmType != PDMBLOCKTYPE_HARD_DISK)
|
---|
798 | return PDMDrvHlpVMSetError(pDrvIns, VERR_PDM_UNSUPPORTED_BLOCK_TYPE, RT_SRC_POS,
|
---|
799 | N_("Only hard disks are currently supported as SCSI devices (enmType=%d)"),
|
---|
800 | enmType);
|
---|
801 |
|
---|
802 | /* Create VSCSI device and LUN. */
|
---|
803 | pThis->VScsiIoCallbacks.pfnVScsiLunMediumGetSize = drvscsiGetSize;
|
---|
804 | pThis->VScsiIoCallbacks.pfnVScsiLunReqTransferEnqueue = drvscsiReqTransferEnqueue;
|
---|
805 |
|
---|
806 | rc = VSCSIDeviceCreate(&pThis->hVScsiDevice, drvscsiVScsiReqCompleted, pThis);
|
---|
807 | AssertMsgReturn(RT_SUCCESS(rc), ("Failed to create VSCSI device rc=%Rrc\n"), rc);
|
---|
808 | rc = VSCSILunCreate(&pThis->hVScsiLun, VSCSILUNTYPE_SBC, &pThis->VScsiIoCallbacks,
|
---|
809 | pThis);
|
---|
810 | AssertMsgReturn(RT_SUCCESS(rc), ("Failed to create VSCSI LUN rc=%Rrc\n"), rc);
|
---|
811 | rc = VSCSIDeviceLunAttach(pThis->hVScsiDevice, pThis->hVScsiLun, 0);
|
---|
812 | AssertMsgReturn(RT_SUCCESS(rc), ("Failed to attached the LUN to the SCSI device\n"), rc);
|
---|
813 |
|
---|
814 | /* Register statistics counter. */
|
---|
815 | /** @todo aeichner: Find a way to put the instance number of the attached
|
---|
816 | * controller device when we support more than one controller of the same type.
|
---|
817 | * At the moment we have the 0 hardcoded. */
|
---|
818 | PDMDrvHlpSTAMRegisterF(pDrvIns, &pThis->StatBytesRead, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_BYTES,
|
---|
819 | "Amount of data read.", "/Devices/SCSI0/%d/ReadBytes", pDrvIns->iInstance);
|
---|
820 | PDMDrvHlpSTAMRegisterF(pDrvIns, &pThis->StatBytesWritten, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_BYTES,
|
---|
821 | "Amount of data written.", "/Devices/SCSI0/%d/WrittenBytes", pDrvIns->iInstance);
|
---|
822 |
|
---|
823 | pThis->StatIoDepth = 0;
|
---|
824 |
|
---|
825 | PDMDrvHlpSTAMRegisterF(pDrvIns, (void *)&pThis->StatIoDepth, STAMTYPE_U32, STAMVISIBILITY_ALWAYS, STAMUNIT_COUNT,
|
---|
826 | "Number of active tasks.", "/Devices/SCSI0/%d/IoDepth", pDrvIns->iInstance);
|
---|
827 |
|
---|
828 | if (!pThis->pDrvBlockAsync)
|
---|
829 | {
|
---|
830 | /* Create request queue. */
|
---|
831 | rc = RTReqCreateQueue(&pThis->pQueueRequests);
|
---|
832 | AssertMsgReturn(RT_SUCCESS(rc), ("Failed to create request queue rc=%Rrc\n"), rc);
|
---|
833 | /* Create I/O thread. */
|
---|
834 | rc = PDMDrvHlpThreadCreate(pDrvIns, &pThis->pAsyncIOThread, pThis, drvscsiAsyncIOLoop,
|
---|
835 | drvscsiAsyncIOLoopWakeup, 0, RTTHREADTYPE_IO, "SCSI async IO");
|
---|
836 | AssertMsgReturn(RT_SUCCESS(rc), ("Failed to create async I/O thread rc=%Rrc\n"), rc);
|
---|
837 |
|
---|
838 | LogRel(("SCSI#%d: using normal I/O\n", pDrvIns->iInstance));
|
---|
839 | }
|
---|
840 | else
|
---|
841 | LogRel(("SCSI#%d: using async I/O\n", pDrvIns->iInstance));
|
---|
842 |
|
---|
843 | return VINF_SUCCESS;
|
---|
844 | }
|
---|
845 |
|
---|
846 | /**
|
---|
847 | * SCSI driver registration record.
|
---|
848 | */
|
---|
849 | const PDMDRVREG g_DrvSCSI =
|
---|
850 | {
|
---|
851 | /* u32Version */
|
---|
852 | PDM_DRVREG_VERSION,
|
---|
853 | /* szName */
|
---|
854 | "SCSI",
|
---|
855 | /* szRCMod */
|
---|
856 | "",
|
---|
857 | /* szR0Mod */
|
---|
858 | "",
|
---|
859 | /* pszDescription */
|
---|
860 | "Generic SCSI driver.",
|
---|
861 | /* fFlags */
|
---|
862 | PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
|
---|
863 | /* fClass. */
|
---|
864 | PDM_DRVREG_CLASS_SCSI,
|
---|
865 | /* cMaxInstances */
|
---|
866 | ~0,
|
---|
867 | /* cbInstance */
|
---|
868 | sizeof(DRVSCSI),
|
---|
869 | /* pfnConstruct */
|
---|
870 | drvscsiConstruct,
|
---|
871 | /* pfnDestruct */
|
---|
872 | drvscsiDestruct,
|
---|
873 | /* pfnRelocate */
|
---|
874 | NULL,
|
---|
875 | /* pfnIOCtl */
|
---|
876 | NULL,
|
---|
877 | /* pfnPowerOn */
|
---|
878 | NULL,
|
---|
879 | /* pfnReset */
|
---|
880 | drvscsiReset,
|
---|
881 | /* pfnSuspend */
|
---|
882 | drvscsiSuspend,
|
---|
883 | /* pfnResume */
|
---|
884 | NULL,
|
---|
885 | /* pfnAttach */
|
---|
886 | NULL,
|
---|
887 | /* pfnDetach */
|
---|
888 | NULL,
|
---|
889 | /* pfnPowerOff */
|
---|
890 | drvscsiPowerOff,
|
---|
891 | /* pfnSoftReset */
|
---|
892 | NULL,
|
---|
893 | /* u32EndVersion */
|
---|
894 | PDM_DRVREG_VERSION
|
---|
895 | };
|
---|
896 |
|
---|