1 | /* $Id: DrvHostSerial.cpp 44528 2013-02-04 14:27:54Z vboxsync $ */
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2 | /** @file
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3 | * VBox stream I/O devices: Host serial driver
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2006-2012 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 |
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20 | /*******************************************************************************
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21 | * Header Files *
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22 | *******************************************************************************/
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23 | #define LOG_GROUP LOG_GROUP_DRV_HOST_SERIAL
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24 | #include <VBox/vmm/pdm.h>
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25 | #include <VBox/err.h>
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26 |
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27 | #include <VBox/log.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/file.h>
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31 | #include <iprt/mem.h>
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32 | #include <iprt/pipe.h>
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33 | #include <iprt/semaphore.h>
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34 | #include <iprt/uuid.h>
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35 |
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36 | #if defined(RT_OS_LINUX) || defined(RT_OS_DARWIN) || defined(RT_OS_SOLARIS) || defined(RT_OS_FREEBSD)
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37 | # include <errno.h>
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38 | # ifdef RT_OS_SOLARIS
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39 | # include <sys/termios.h>
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40 | # else
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41 | # include <termios.h>
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42 | # endif
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43 | # include <sys/types.h>
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44 | # include <fcntl.h>
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45 | # include <string.h>
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46 | # include <unistd.h>
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47 | # ifdef RT_OS_DARWIN
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48 | # include <sys/select.h>
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49 | # else
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50 | # include <sys/poll.h>
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51 | # endif
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52 | # include <sys/ioctl.h>
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53 | # include <pthread.h>
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54 |
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55 | # ifdef RT_OS_LINUX
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56 | /*
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57 | * TIOCM_LOOP is not defined in the above header files for some reason but in asm/termios.h.
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58 | * But inclusion of this file however leads to compilation errors because of redefinition of some
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59 | * structs. That's why it is defined here until a better solution is found.
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60 | */
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61 | # ifndef TIOCM_LOOP
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62 | # define TIOCM_LOOP 0x8000
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63 | # endif
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64 | /* For linux custom baudrate code we also need serial_struct */
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65 | # include <linux/serial.h>
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66 | # endif /* linux */
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67 |
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68 | #elif defined(RT_OS_WINDOWS)
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69 | # include <Windows.h>
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70 | #endif
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71 |
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72 | #include "VBoxDD.h"
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73 |
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74 |
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75 | /*******************************************************************************
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76 | * Structures and Typedefs *
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77 | *******************************************************************************/
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78 |
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79 | /**
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80 | * Char driver instance data.
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81 | *
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82 | * @implements PDMICHARCONNECTOR
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83 | */
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84 | typedef struct DRVHOSTSERIAL
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85 | {
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86 | /** Pointer to the driver instance structure. */
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87 | PPDMDRVINS pDrvIns;
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88 | /** Pointer to the char port interface of the driver/device above us. */
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89 | PPDMICHARPORT pDrvCharPort;
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90 | /** Our char interface. */
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91 | PDMICHARCONNECTOR ICharConnector;
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92 | /** Receive thread. */
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93 | PPDMTHREAD pRecvThread;
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94 | /** Send thread. */
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95 | PPDMTHREAD pSendThread;
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96 | /** Status lines monitor thread. */
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97 | PPDMTHREAD pMonitorThread;
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98 | /** Send event semaphore */
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99 | RTSEMEVENT SendSem;
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100 |
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101 | /** the device path */
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102 | char *pszDevicePath;
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103 |
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104 | #if defined(RT_OS_LINUX) || defined(RT_OS_DARWIN) || defined(RT_OS_SOLARIS) || defined(RT_OS_FREEBSD)
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105 | /** the device handle */
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106 | RTFILE hDeviceFile;
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107 | # ifdef RT_OS_DARWIN
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108 | /** The device handle used for reading.
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109 | * Used to prevent the read select from blocking the writes. */
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110 | RTFILE hDeviceFileR;
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111 | # endif
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112 | /** The read end of the control pipe */
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113 | RTPIPE hWakeupPipeR;
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114 | /** The write end of the control pipe */
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115 | RTPIPE hWakeupPipeW;
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116 | # ifndef RT_OS_LINUX
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117 | /** The current line status.
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118 | * Used by the polling version of drvHostSerialMonitorThread. */
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119 | int fStatusLines;
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120 | # endif
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121 | #elif defined(RT_OS_WINDOWS)
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122 | /** the device handle */
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123 | HANDLE hDeviceFile;
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124 | /** The event semaphore for waking up the receive thread */
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125 | HANDLE hHaltEventSem;
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126 | /** The event semaphore for overlapped receiving */
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127 | HANDLE hEventRecv;
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128 | /** For overlapped receiving */
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129 | OVERLAPPED overlappedRecv;
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130 | /** The event semaphore for overlapped sending */
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131 | HANDLE hEventSend;
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132 | /** For overlapped sending */
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133 | OVERLAPPED overlappedSend;
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134 | #endif
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135 |
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136 | /** Internal send FIFO queue */
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137 | uint8_t volatile u8SendByte;
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138 | bool volatile fSending;
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139 | uint8_t Alignment[2];
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140 |
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141 | /** Read/write statistics */
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142 | STAMCOUNTER StatBytesRead;
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143 | STAMCOUNTER StatBytesWritten;
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144 | #ifdef RT_OS_DARWIN
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145 | /** The number of bytes we've dropped because the send queue
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146 | * was full. */
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147 | STAMCOUNTER StatSendOverflows;
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148 | #endif
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149 | } DRVHOSTSERIAL, *PDRVHOSTSERIAL;
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150 |
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151 |
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152 | /** Converts a pointer to DRVCHAR::ICharConnector to a PDRVHOSTSERIAL. */
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153 | #define PDMICHAR_2_DRVHOSTSERIAL(pInterface) RT_FROM_MEMBER(pInterface, DRVHOSTSERIAL, ICharConnector)
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154 |
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155 |
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156 | /* -=-=-=-=- IBase -=-=-=-=- */
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157 |
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158 | /**
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159 | * @interface_method_impl{PDMIBASE,pfnQueryInterface}
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160 | */
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161 | static DECLCALLBACK(void *) drvHostSerialQueryInterface(PPDMIBASE pInterface, const char *pszIID)
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162 | {
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163 | PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
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164 | PDRVHOSTSERIAL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTSERIAL);
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165 |
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166 | PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase);
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167 | PDMIBASE_RETURN_INTERFACE(pszIID, PDMICHARCONNECTOR, &pThis->ICharConnector);
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168 | return NULL;
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169 | }
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170 |
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171 |
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172 | /* -=-=-=-=- ICharConnector -=-=-=-=- */
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173 |
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174 | /** @copydoc PDMICHARCONNECTOR::pfnWrite */
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175 | static DECLCALLBACK(int) drvHostSerialWrite(PPDMICHARCONNECTOR pInterface, const void *pvBuf, size_t cbWrite)
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176 | {
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177 | PDRVHOSTSERIAL pThis = PDMICHAR_2_DRVHOSTSERIAL(pInterface);
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178 | const uint8_t *pbBuffer = (const uint8_t *)pvBuf;
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179 |
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180 | LogFlow(("%s: pvBuf=%#p cbWrite=%d\n", __FUNCTION__, pvBuf, cbWrite));
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181 |
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182 | for (uint32_t i = 0; i < cbWrite; i++)
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183 | {
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184 | if (ASMAtomicXchgBool(&pThis->fSending, true))
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185 | return VERR_BUFFER_OVERFLOW;
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186 |
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187 | pThis->u8SendByte = pbBuffer[i];
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188 | RTSemEventSignal(pThis->SendSem);
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189 | STAM_COUNTER_INC(&pThis->StatBytesWritten);
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190 | }
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191 | return VINF_SUCCESS;
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192 | }
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193 |
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194 | static DECLCALLBACK(int) drvHostSerialSetParameters(PPDMICHARCONNECTOR pInterface, unsigned Bps, char chParity, unsigned cDataBits, unsigned cStopBits)
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195 | {
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196 | PDRVHOSTSERIAL pThis = PDMICHAR_2_DRVHOSTSERIAL(pInterface);
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197 | #if defined(RT_OS_LINUX) || defined(RT_OS_DARWIN) || defined(RT_OS_SOLARIS) || defined(RT_OS_FREEBSD)
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198 | struct termios *termiosSetup;
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199 | int baud_rate;
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200 | #elif defined(RT_OS_WINDOWS)
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201 | LPDCB comSetup;
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202 | #endif
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203 |
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204 | LogFlow(("%s: Bps=%u chParity=%c cDataBits=%u cStopBits=%u\n", __FUNCTION__, Bps, chParity, cDataBits, cStopBits));
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205 |
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206 | #if defined(RT_OS_LINUX) || defined(RT_OS_DARWIN) || defined(RT_OS_SOLARIS)
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207 | termiosSetup = (struct termios *)RTMemTmpAllocZ(sizeof(struct termios));
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208 |
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209 | /* Enable receiver */
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210 | termiosSetup->c_cflag |= (CLOCAL | CREAD);
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211 |
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212 | switch (Bps)
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213 | {
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214 | case 50:
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215 | baud_rate = B50;
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216 | break;
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217 | case 75:
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218 | baud_rate = B75;
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219 | break;
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220 | case 110:
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221 | baud_rate = B110;
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222 | break;
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223 | case 134:
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224 | baud_rate = B134;
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225 | break;
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226 | case 150:
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227 | baud_rate = B150;
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228 | break;
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229 | case 200:
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230 | baud_rate = B200;
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231 | break;
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232 | case 300:
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233 | baud_rate = B300;
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234 | break;
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235 | case 600:
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236 | baud_rate = B600;
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237 | break;
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238 | case 1200:
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239 | baud_rate = B1200;
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240 | break;
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241 | case 1800:
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242 | baud_rate = B1800;
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243 | break;
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244 | case 2400:
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245 | baud_rate = B2400;
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246 | break;
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247 | case 4800:
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248 | baud_rate = B4800;
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249 | break;
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250 | case 9600:
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251 | baud_rate = B9600;
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252 | break;
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253 | case 19200:
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254 | baud_rate = B19200;
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255 | break;
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256 | case 38400:
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257 | baud_rate = B38400;
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258 | break;
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259 | case 57600:
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260 | baud_rate = B57600;
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261 | break;
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262 | case 115200:
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263 | baud_rate = B115200;
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264 | break;
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265 | default:
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266 | #ifdef RT_OS_LINUX
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267 | struct serial_struct serialStruct;
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268 | if (ioctl(RTFileToNative(pThis->hDeviceFile), TIOCGSERIAL, &serialStruct) != -1)
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269 | {
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270 | serialStruct.custom_divisor = serialStruct.baud_base / Bps;
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271 | if (!serialStruct.custom_divisor)
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272 | serialStruct.custom_divisor = 1;
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273 | serialStruct.flags &= ~ASYNC_SPD_MASK;
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274 | serialStruct.flags |= ASYNC_SPD_CUST;
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275 | ioctl(RTFileToNative(pThis->hDeviceFile), TIOCSSERIAL, &serialStruct);
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276 | baud_rate = B38400;
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277 | }
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278 | else
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279 | baud_rate = B9600;
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280 | #else /* !RT_OS_LINUX */
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281 | baud_rate = B9600;
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282 | #endif /* !RT_OS_LINUX */
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283 | }
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284 |
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285 | cfsetispeed(termiosSetup, baud_rate);
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286 | cfsetospeed(termiosSetup, baud_rate);
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287 |
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288 | switch (chParity)
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289 | {
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290 | case 'E':
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291 | termiosSetup->c_cflag |= PARENB;
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292 | break;
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293 | case 'O':
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294 | termiosSetup->c_cflag |= (PARENB | PARODD);
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295 | break;
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296 | case 'N':
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297 | break;
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298 | default:
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299 | break;
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300 | }
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301 |
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302 | switch (cDataBits)
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303 | {
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304 | case 5:
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305 | termiosSetup->c_cflag |= CS5;
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306 | break;
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307 | case 6:
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308 | termiosSetup->c_cflag |= CS6;
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309 | break;
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310 | case 7:
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311 | termiosSetup->c_cflag |= CS7;
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312 | break;
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313 | case 8:
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314 | termiosSetup->c_cflag |= CS8;
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315 | break;
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316 | default:
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317 | break;
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318 | }
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319 |
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320 | switch (cStopBits)
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321 | {
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322 | case 2:
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323 | termiosSetup->c_cflag |= CSTOPB;
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324 | default:
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325 | break;
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326 | }
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327 |
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328 | /* set serial port to raw input */
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329 | termiosSetup->c_lflag &= ~(ICANON | ECHO | ECHOE | ECHONL | ECHOK | ISIG | IEXTEN);
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330 |
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331 | tcsetattr(RTFileToNative(pThis->hDeviceFile), TCSANOW, termiosSetup);
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332 | RTMemTmpFree(termiosSetup);
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333 |
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334 | #ifdef RT_OS_LINUX
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335 | /*
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336 | * XXX In Linux, if a thread calls tcsetattr while the monitor thread is
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337 | * waiting in ioctl for a modem status change then 8250.c wrongly disables
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338 | * modem irqs and so the monitor thread never gets released. The workaround
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339 | * is to send a signal after each tcsetattr.
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340 | */
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341 | RTThreadPoke(pThis->pMonitorThread->Thread);
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342 | #endif
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343 |
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344 | #elif defined(RT_OS_WINDOWS)
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345 | comSetup = (LPDCB)RTMemTmpAllocZ(sizeof(DCB));
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346 |
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347 | comSetup->DCBlength = sizeof(DCB);
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348 |
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349 | switch (Bps)
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350 | {
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351 | case 110:
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352 | comSetup->BaudRate = CBR_110;
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353 | break;
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354 | case 300:
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355 | comSetup->BaudRate = CBR_300;
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356 | break;
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357 | case 600:
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358 | comSetup->BaudRate = CBR_600;
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359 | break;
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360 | case 1200:
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361 | comSetup->BaudRate = CBR_1200;
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362 | break;
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363 | case 2400:
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364 | comSetup->BaudRate = CBR_2400;
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365 | break;
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366 | case 4800:
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367 | comSetup->BaudRate = CBR_4800;
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368 | break;
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369 | case 9600:
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370 | comSetup->BaudRate = CBR_9600;
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371 | break;
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372 | case 14400:
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373 | comSetup->BaudRate = CBR_14400;
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374 | break;
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375 | case 19200:
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376 | comSetup->BaudRate = CBR_19200;
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377 | break;
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378 | case 38400:
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379 | comSetup->BaudRate = CBR_38400;
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380 | break;
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381 | case 57600:
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382 | comSetup->BaudRate = CBR_57600;
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383 | break;
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384 | case 115200:
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385 | comSetup->BaudRate = CBR_115200;
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386 | break;
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387 | default:
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388 | comSetup->BaudRate = CBR_9600;
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389 | }
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390 |
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391 | comSetup->fBinary = TRUE;
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392 | comSetup->fOutxCtsFlow = FALSE;
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393 | comSetup->fOutxDsrFlow = FALSE;
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394 | comSetup->fDtrControl = DTR_CONTROL_DISABLE;
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395 | comSetup->fDsrSensitivity = FALSE;
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396 | comSetup->fTXContinueOnXoff = TRUE;
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397 | comSetup->fOutX = FALSE;
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398 | comSetup->fInX = FALSE;
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399 | comSetup->fErrorChar = FALSE;
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400 | comSetup->fNull = FALSE;
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401 | comSetup->fRtsControl = RTS_CONTROL_DISABLE;
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402 | comSetup->fAbortOnError = FALSE;
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403 | comSetup->wReserved = 0;
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404 | comSetup->XonLim = 5;
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405 | comSetup->XoffLim = 5;
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406 | comSetup->ByteSize = cDataBits;
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407 |
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408 | switch (chParity)
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409 | {
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410 | case 'E':
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411 | comSetup->Parity = EVENPARITY;
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412 | break;
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413 | case 'O':
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414 | comSetup->Parity = ODDPARITY;
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415 | break;
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416 | case 'N':
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417 | comSetup->Parity = NOPARITY;
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418 | break;
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419 | default:
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420 | break;
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421 | }
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422 |
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423 | switch (cStopBits)
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424 | {
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425 | case 1:
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426 | comSetup->StopBits = ONESTOPBIT;
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427 | break;
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428 | case 2:
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429 | comSetup->StopBits = TWOSTOPBITS;
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430 | break;
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431 | default:
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432 | break;
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433 | }
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434 |
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435 | comSetup->XonChar = 0;
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436 | comSetup->XoffChar = 0;
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437 | comSetup->ErrorChar = 0;
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438 | comSetup->EofChar = 0;
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439 | comSetup->EvtChar = 0;
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440 |
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441 | SetCommState(pThis->hDeviceFile, comSetup);
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442 | RTMemTmpFree(comSetup);
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443 | #endif /* RT_OS_WINDOWS */
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444 |
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445 | return VINF_SUCCESS;
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446 | }
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447 |
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448 | /* -=-=-=-=- receive thread -=-=-=-=- */
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449 |
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450 | /**
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451 | * Send thread loop.
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452 | *
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453 | * @returns VINF_SUCCESS.
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454 | * @param ThreadSelf Thread handle to this thread.
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455 | * @param pvUser User argument.
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456 | */
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457 | static DECLCALLBACK(int) drvHostSerialSendThread(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
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458 | {
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459 | PDRVHOSTSERIAL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTSERIAL);
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460 |
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461 | if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
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462 | return VINF_SUCCESS;
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463 |
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464 | #ifdef RT_OS_WINDOWS
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465 | /* Make sure that the halt event semaphore is reset. */
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466 | DWORD dwRet = WaitForSingleObject(pThis->hHaltEventSem, 0);
|
---|
467 |
|
---|
468 | HANDLE haWait[2];
|
---|
469 | haWait[0] = pThis->hEventSend;
|
---|
470 | haWait[1] = pThis->hHaltEventSem;
|
---|
471 | #endif
|
---|
472 |
|
---|
473 | while (pThread->enmState == PDMTHREADSTATE_RUNNING)
|
---|
474 | {
|
---|
475 | int rc = RTSemEventWait(pThis->SendSem, RT_INDEFINITE_WAIT);
|
---|
476 | if (RT_FAILURE(rc))
|
---|
477 | break;
|
---|
478 |
|
---|
479 | /*
|
---|
480 | * Write the character to the host device.
|
---|
481 | */
|
---|
482 | while (pThread->enmState == PDMTHREADSTATE_RUNNING)
|
---|
483 | {
|
---|
484 | /* copy the send queue so we get a linear buffer with the maximal size. */
|
---|
485 | uint8_t ch = pThis->u8SendByte;
|
---|
486 | #if defined(RT_OS_LINUX) || defined(RT_OS_DARWIN) || defined(RT_OS_SOLARIS) || defined(RT_OS_FREEBSD)
|
---|
487 |
|
---|
488 | size_t cbWritten;
|
---|
489 | rc = RTFileWrite(pThis->hDeviceFile, &ch, 1, &cbWritten);
|
---|
490 | if (rc == VERR_TRY_AGAIN)
|
---|
491 | cbWritten = 0;
|
---|
492 | if (cbWritten < 1 && (RT_SUCCESS(rc) || rc == VERR_TRY_AGAIN))
|
---|
493 | {
|
---|
494 | /* ok, block till the device is ready for more (O_NONBLOCK) effect. */
|
---|
495 | rc = VINF_SUCCESS;
|
---|
496 | while (pThread->enmState == PDMTHREADSTATE_RUNNING)
|
---|
497 | {
|
---|
498 | /* wait */
|
---|
499 | fd_set WrSet;
|
---|
500 | FD_ZERO(&WrSet);
|
---|
501 | FD_SET(RTFileToNative(pThis->hDeviceFile), &WrSet);
|
---|
502 | fd_set XcptSet;
|
---|
503 | FD_ZERO(&XcptSet);
|
---|
504 | FD_SET(RTFileToNative(pThis->hDeviceFile), &XcptSet);
|
---|
505 | # ifdef DEBUG
|
---|
506 | uint64_t u64Now = RTTimeMilliTS();
|
---|
507 | # endif
|
---|
508 | rc = select(RTFileToNative(pThis->hDeviceFile) + 1, NULL, &WrSet, &XcptSet, NULL);
|
---|
509 | /** @todo check rc? */
|
---|
510 |
|
---|
511 | # ifdef DEBUG
|
---|
512 | Log2(("select wait for %dms\n", RTTimeMilliTS() - u64Now));
|
---|
513 | # endif
|
---|
514 | /* try write more */
|
---|
515 | rc = RTFileWrite(pThis->hDeviceFile, &ch, 1, &cbWritten);
|
---|
516 | if (rc == VERR_TRY_AGAIN)
|
---|
517 | cbWritten = 0;
|
---|
518 | else if (RT_FAILURE(rc))
|
---|
519 | break;
|
---|
520 | else if (cbWritten >= 1)
|
---|
521 | break;
|
---|
522 | rc = VINF_SUCCESS;
|
---|
523 | } /* wait/write loop */
|
---|
524 | }
|
---|
525 |
|
---|
526 | #elif defined(RT_OS_WINDOWS)
|
---|
527 | /* perform an overlapped write operation. */
|
---|
528 | DWORD cbWritten;
|
---|
529 | memset(&pThis->overlappedSend, 0, sizeof(pThis->overlappedSend));
|
---|
530 | pThis->overlappedSend.hEvent = pThis->hEventSend;
|
---|
531 | if (!WriteFile(pThis->hDeviceFile, &ch, 1, &cbWritten, &pThis->overlappedSend))
|
---|
532 | {
|
---|
533 | dwRet = GetLastError();
|
---|
534 | if (dwRet == ERROR_IO_PENDING)
|
---|
535 | {
|
---|
536 | /*
|
---|
537 | * write blocked, wait for completion or wakeup...
|
---|
538 | */
|
---|
539 | dwRet = WaitForMultipleObjects(2, haWait, FALSE, INFINITE);
|
---|
540 | if (dwRet != WAIT_OBJECT_0)
|
---|
541 | {
|
---|
542 | AssertMsg(pThread->enmState != PDMTHREADSTATE_RUNNING, ("The halt event semaphore is set but the thread is still in running state\n"));
|
---|
543 | break;
|
---|
544 | }
|
---|
545 | }
|
---|
546 | else
|
---|
547 | rc = RTErrConvertFromWin32(dwRet);
|
---|
548 | }
|
---|
549 |
|
---|
550 | #endif /* RT_OS_WINDOWS */
|
---|
551 | if (RT_FAILURE(rc))
|
---|
552 | {
|
---|
553 | LogRel(("HostSerial#%d: Serial Write failed with %Rrc; terminating send thread\n", pDrvIns->iInstance, rc));
|
---|
554 | return rc;
|
---|
555 | }
|
---|
556 | ASMAtomicXchgBool(&pThis->fSending, false);
|
---|
557 | break;
|
---|
558 | } /* write loop */
|
---|
559 | }
|
---|
560 |
|
---|
561 | return VINF_SUCCESS;
|
---|
562 | }
|
---|
563 |
|
---|
564 | /**
|
---|
565 | * Unblock the send thread so it can respond to a state change.
|
---|
566 | *
|
---|
567 | * @returns a VBox status code.
|
---|
568 | * @param pDrvIns The driver instance.
|
---|
569 | * @param pThread The send thread.
|
---|
570 | */
|
---|
571 | static DECLCALLBACK(int) drvHostSerialWakeupSendThread(PPDMDRVINS pDrvIns, PPDMTHREAD /*pThread*/)
|
---|
572 | {
|
---|
573 | PDRVHOSTSERIAL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTSERIAL);
|
---|
574 | int rc;
|
---|
575 |
|
---|
576 | rc = RTSemEventSignal(pThis->SendSem);
|
---|
577 | if (RT_FAILURE(rc))
|
---|
578 | return rc;
|
---|
579 |
|
---|
580 | #ifdef RT_OS_WINDOWS
|
---|
581 | if (!SetEvent(pThis->hHaltEventSem))
|
---|
582 | return RTErrConvertFromWin32(GetLastError());
|
---|
583 | #endif
|
---|
584 |
|
---|
585 | return VINF_SUCCESS;
|
---|
586 | }
|
---|
587 |
|
---|
588 | /* -=-=-=-=- receive thread -=-=-=-=- */
|
---|
589 |
|
---|
590 | /**
|
---|
591 | * Receive thread loop.
|
---|
592 | *
|
---|
593 | * This thread pushes data from the host serial device up the driver
|
---|
594 | * chain toward the serial device.
|
---|
595 | *
|
---|
596 | * @returns VINF_SUCCESS.
|
---|
597 | * @param ThreadSelf Thread handle to this thread.
|
---|
598 | * @param pvUser User argument.
|
---|
599 | */
|
---|
600 | static DECLCALLBACK(int) drvHostSerialRecvThread(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
|
---|
601 | {
|
---|
602 | PDRVHOSTSERIAL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTSERIAL);
|
---|
603 | uint8_t abBuffer[256];
|
---|
604 | uint8_t *pbBuffer = NULL;
|
---|
605 | size_t cbRemaining = 0; /* start by reading host data */
|
---|
606 | int rc = VINF_SUCCESS;
|
---|
607 | int rcThread = VINF_SUCCESS;
|
---|
608 |
|
---|
609 | if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
|
---|
610 | return VINF_SUCCESS;
|
---|
611 |
|
---|
612 | #ifdef RT_OS_WINDOWS
|
---|
613 | /* Make sure that the halt event semaphore is reset. */
|
---|
614 | DWORD dwRet = WaitForSingleObject(pThis->hHaltEventSem, 0);
|
---|
615 |
|
---|
616 | HANDLE ahWait[2];
|
---|
617 | ahWait[0] = pThis->hEventRecv;
|
---|
618 | ahWait[1] = pThis->hHaltEventSem;
|
---|
619 | #endif
|
---|
620 |
|
---|
621 | while (pThread->enmState == PDMTHREADSTATE_RUNNING)
|
---|
622 | {
|
---|
623 | if (!cbRemaining)
|
---|
624 | {
|
---|
625 | /* Get a block of data from the host serial device. */
|
---|
626 |
|
---|
627 | #if defined(RT_OS_DARWIN) /* poll is broken on x86 darwin, returns POLLNVAL. */
|
---|
628 | fd_set RdSet;
|
---|
629 | FD_ZERO(&RdSet);
|
---|
630 | FD_SET(RTFileToNative(pThis->hDeviceFileR), &RdSet);
|
---|
631 | FD_SET(RTPipeToNative(pThis->hWakeupPipeR), &RdSet);
|
---|
632 | fd_set XcptSet;
|
---|
633 | FD_ZERO(&XcptSet);
|
---|
634 | FD_SET(RTFileToNative(pThis->hDeviceFile), &XcptSet);
|
---|
635 | FD_SET(RTPipeToNative(pThis->hWakeupPipeR), &XcptSet);
|
---|
636 | # if 1 /* it seems like this select is blocking the write... */
|
---|
637 | rc = select(RT_MAX(RTPipeToNative(pThis->hWakeupPipeR), RTFileToNative(pThis->hDeviceFileR)) + 1,
|
---|
638 | &RdSet, NULL, &XcptSet, NULL);
|
---|
639 | # else
|
---|
640 | struct timeval tv = { 0, 1000 };
|
---|
641 | rc = select(RTPipeToNative(pThis->hWakeupPipeR), RTFileToNative(pThis->hDeviceFileR) + 1,
|
---|
642 | &RdSet, NULL, &XcptSet, &tv);
|
---|
643 | # endif
|
---|
644 | if (rc == -1)
|
---|
645 | {
|
---|
646 | int err = errno;
|
---|
647 | rcThread = RTErrConvertFromErrno(err);
|
---|
648 | LogRel(("HostSerial#%d: select failed with errno=%d / %Rrc, terminating the worker thread.\n", pDrvIns->iInstance, err, rcThread));
|
---|
649 | break;
|
---|
650 | }
|
---|
651 |
|
---|
652 | /* this might have changed in the meantime */
|
---|
653 | if (pThread->enmState != PDMTHREADSTATE_RUNNING)
|
---|
654 | break;
|
---|
655 | if (rc == 0)
|
---|
656 | continue;
|
---|
657 |
|
---|
658 | /* drain the wakeup pipe */
|
---|
659 | size_t cbRead;
|
---|
660 | if ( FD_ISSET(RTPipeToNative(pThis->hWakeupPipeR), &RdSet)
|
---|
661 | || FD_ISSET(RTPipeToNative(pThis->hWakeupPipeR), &XcptSet))
|
---|
662 | {
|
---|
663 | rc = RTPipeRead(pThis->hWakeupPipeR, abBuffer, 1, &cbRead);
|
---|
664 | if (RT_FAILURE(rc))
|
---|
665 | {
|
---|
666 | LogRel(("HostSerial#%d: draining the wakeup pipe failed with %Rrc, terminating the worker thread.\n", pDrvIns->iInstance, rc));
|
---|
667 | rcThread = rc;
|
---|
668 | break;
|
---|
669 | }
|
---|
670 | continue;
|
---|
671 | }
|
---|
672 |
|
---|
673 | /* read data from the serial port. */
|
---|
674 | rc = RTFileRead(pThis->hDeviceFileR, abBuffer, sizeof(abBuffer), &cbRead);
|
---|
675 | if (RT_FAILURE(rc))
|
---|
676 | {
|
---|
677 | LogRel(("HostSerial#%d: (1) Read failed with %Rrc, terminating the worker thread.\n", pDrvIns->iInstance, rc));
|
---|
678 | rcThread = rc;
|
---|
679 | break;
|
---|
680 | }
|
---|
681 | cbRemaining = cbRead;
|
---|
682 |
|
---|
683 | #elif defined(RT_OS_LINUX) || defined(RT_OS_SOLARIS) || defined(RT_OS_FREEBSD)
|
---|
684 |
|
---|
685 | size_t cbRead;
|
---|
686 | struct pollfd aFDs[2];
|
---|
687 | aFDs[0].fd = RTFileToNative(pThis->hDeviceFile);
|
---|
688 | aFDs[0].events = POLLIN;
|
---|
689 | aFDs[0].revents = 0;
|
---|
690 | aFDs[1].fd = RTPipeToNative(pThis->hWakeupPipeR);
|
---|
691 | aFDs[1].events = POLLIN | POLLERR | POLLHUP;
|
---|
692 | aFDs[1].revents = 0;
|
---|
693 | rc = poll(aFDs, RT_ELEMENTS(aFDs), -1);
|
---|
694 | if (rc < 0)
|
---|
695 | {
|
---|
696 | int err = errno;
|
---|
697 | if (err == EINTR)
|
---|
698 | {
|
---|
699 | /*
|
---|
700 | * EINTR errors should be harmless, even if they are not supposed to occur in our setup.
|
---|
701 | */
|
---|
702 | Log(("rc=%d revents=%#x,%#x errno=%p %s\n", rc, aFDs[0].revents, aFDs[1].revents, err, strerror(err)));
|
---|
703 | RTThreadYield();
|
---|
704 | continue;
|
---|
705 | }
|
---|
706 |
|
---|
707 | rcThread = RTErrConvertFromErrno(err);
|
---|
708 | LogRel(("HostSerial#%d: poll failed with errno=%d / %Rrc, terminating the worker thread.\n", pDrvIns->iInstance, err, rcThread));
|
---|
709 | break;
|
---|
710 | }
|
---|
711 | /* this might have changed in the meantime */
|
---|
712 | if (pThread->enmState != PDMTHREADSTATE_RUNNING)
|
---|
713 | break;
|
---|
714 | if (rc > 0 && aFDs[1].revents)
|
---|
715 | {
|
---|
716 | if (aFDs[1].revents & (POLLHUP | POLLERR | POLLNVAL))
|
---|
717 | break;
|
---|
718 | /* notification to terminate -- drain the pipe */
|
---|
719 | RTPipeRead(pThis->hWakeupPipeR, &abBuffer, 1, &cbRead);
|
---|
720 | continue;
|
---|
721 | }
|
---|
722 | rc = RTFileRead(pThis->hDeviceFile, abBuffer, sizeof(abBuffer), &cbRead);
|
---|
723 | if (RT_FAILURE(rc))
|
---|
724 | {
|
---|
725 | /* don't terminate worker thread when data unavailable */
|
---|
726 | if (rc == VERR_TRY_AGAIN)
|
---|
727 | continue;
|
---|
728 |
|
---|
729 | LogRel(("HostSerial#%d: (2) Read failed with %Rrc, terminating the worker thread.\n", pDrvIns->iInstance, rc));
|
---|
730 | rcThread = rc;
|
---|
731 | break;
|
---|
732 | }
|
---|
733 | cbRemaining = cbRead;
|
---|
734 |
|
---|
735 | #elif defined(RT_OS_WINDOWS)
|
---|
736 |
|
---|
737 | DWORD dwEventMask = 0;
|
---|
738 | DWORD dwNumberOfBytesTransferred;
|
---|
739 |
|
---|
740 | memset(&pThis->overlappedRecv, 0, sizeof(pThis->overlappedRecv));
|
---|
741 | pThis->overlappedRecv.hEvent = pThis->hEventRecv;
|
---|
742 |
|
---|
743 | if (!WaitCommEvent(pThis->hDeviceFile, &dwEventMask, &pThis->overlappedRecv))
|
---|
744 | {
|
---|
745 | dwRet = GetLastError();
|
---|
746 | if (dwRet == ERROR_IO_PENDING)
|
---|
747 | {
|
---|
748 | dwRet = WaitForMultipleObjects(2, ahWait, FALSE, INFINITE);
|
---|
749 | if (dwRet != WAIT_OBJECT_0)
|
---|
750 | {
|
---|
751 | /* notification to terminate */
|
---|
752 | AssertMsg(pThread->enmState != PDMTHREADSTATE_RUNNING, ("The halt event semaphore is set but the thread is still in running state\n"));
|
---|
753 | break;
|
---|
754 | }
|
---|
755 | }
|
---|
756 | else
|
---|
757 | {
|
---|
758 | rcThread = RTErrConvertFromWin32(dwRet);
|
---|
759 | LogRel(("HostSerial#%d: Wait failed with error %Rrc; terminating the worker thread.\n", pDrvIns->iInstance, rcThread));
|
---|
760 | break;
|
---|
761 | }
|
---|
762 | }
|
---|
763 | /* this might have changed in the meantime */
|
---|
764 | if (pThread->enmState != PDMTHREADSTATE_RUNNING)
|
---|
765 | break;
|
---|
766 |
|
---|
767 | /* Check the event */
|
---|
768 | if (dwEventMask & EV_RXCHAR)
|
---|
769 | {
|
---|
770 | if (!ReadFile(pThis->hDeviceFile, abBuffer, sizeof(abBuffer), &dwNumberOfBytesTransferred, &pThis->overlappedRecv))
|
---|
771 | {
|
---|
772 | rcThread = RTErrConvertFromWin32(GetLastError());
|
---|
773 | LogRel(("HostSerial#%d: Read failed with error %Rrc; terminating the worker thread.\n", pDrvIns->iInstance, rcThread));
|
---|
774 | break;
|
---|
775 | }
|
---|
776 | cbRemaining = dwNumberOfBytesTransferred;
|
---|
777 | }
|
---|
778 | else if (dwEventMask & EV_BREAK)
|
---|
779 | {
|
---|
780 | Log(("HostSerial#%d: Detected break\n"));
|
---|
781 | rc = pThis->pDrvCharPort->pfnNotifyBreak(pThis->pDrvCharPort);
|
---|
782 | }
|
---|
783 | else
|
---|
784 | {
|
---|
785 | /* The status lines have changed. Notify the device. */
|
---|
786 | DWORD dwNewStatusLinesState = 0;
|
---|
787 | uint32_t uNewStatusLinesState = 0;
|
---|
788 |
|
---|
789 | /* Get the new state */
|
---|
790 | if (GetCommModemStatus(pThis->hDeviceFile, &dwNewStatusLinesState))
|
---|
791 | {
|
---|
792 | if (dwNewStatusLinesState & MS_RLSD_ON)
|
---|
793 | uNewStatusLinesState |= PDMICHARPORT_STATUS_LINES_DCD;
|
---|
794 | if (dwNewStatusLinesState & MS_RING_ON)
|
---|
795 | uNewStatusLinesState |= PDMICHARPORT_STATUS_LINES_RI;
|
---|
796 | if (dwNewStatusLinesState & MS_DSR_ON)
|
---|
797 | uNewStatusLinesState |= PDMICHARPORT_STATUS_LINES_DSR;
|
---|
798 | if (dwNewStatusLinesState & MS_CTS_ON)
|
---|
799 | uNewStatusLinesState |= PDMICHARPORT_STATUS_LINES_CTS;
|
---|
800 | rc = pThis->pDrvCharPort->pfnNotifyStatusLinesChanged(pThis->pDrvCharPort, uNewStatusLinesState);
|
---|
801 | if (RT_FAILURE(rc))
|
---|
802 | {
|
---|
803 | /* Notifying device failed, continue but log it */
|
---|
804 | LogRel(("HostSerial#%d: Notifying device failed with error %Rrc; continuing.\n", pDrvIns->iInstance, rc));
|
---|
805 | }
|
---|
806 | }
|
---|
807 | else
|
---|
808 | {
|
---|
809 | /* Getting new state failed, continue but log it */
|
---|
810 | LogRel(("HostSerial#%d: Getting status lines state failed with error %Rrc; continuing.\n", pDrvIns->iInstance, RTErrConvertFromWin32(GetLastError())));
|
---|
811 | }
|
---|
812 | }
|
---|
813 | #endif
|
---|
814 |
|
---|
815 | Log(("Read %d bytes.\n", cbRemaining));
|
---|
816 | pbBuffer = abBuffer;
|
---|
817 | }
|
---|
818 | else
|
---|
819 | {
|
---|
820 | /* Send data to the guest. */
|
---|
821 | size_t cbProcessed = cbRemaining;
|
---|
822 | rc = pThis->pDrvCharPort->pfnNotifyRead(pThis->pDrvCharPort, pbBuffer, &cbProcessed);
|
---|
823 | if (RT_SUCCESS(rc))
|
---|
824 | {
|
---|
825 | Assert(cbProcessed); Assert(cbProcessed <= cbRemaining);
|
---|
826 | pbBuffer += cbProcessed;
|
---|
827 | cbRemaining -= cbProcessed;
|
---|
828 | STAM_COUNTER_ADD(&pThis->StatBytesRead, cbProcessed);
|
---|
829 | }
|
---|
830 | else if (rc == VERR_TIMEOUT)
|
---|
831 | {
|
---|
832 | /* Normal case, just means that the guest didn't accept a new
|
---|
833 | * character before the timeout elapsed. Just retry. */
|
---|
834 | rc = VINF_SUCCESS;
|
---|
835 | }
|
---|
836 | else
|
---|
837 | {
|
---|
838 | LogRel(("HostSerial#%d: NotifyRead failed with %Rrc, terminating the worker thread.\n", pDrvIns->iInstance, rc));
|
---|
839 | rcThread = rc;
|
---|
840 | break;
|
---|
841 | }
|
---|
842 | }
|
---|
843 | }
|
---|
844 |
|
---|
845 | return rcThread;
|
---|
846 | }
|
---|
847 |
|
---|
848 | /**
|
---|
849 | * Unblock the send thread so it can respond to a state change.
|
---|
850 | *
|
---|
851 | * @returns a VBox status code.
|
---|
852 | * @param pDrvIns The driver instance.
|
---|
853 | * @param pThread The send thread.
|
---|
854 | */
|
---|
855 | static DECLCALLBACK(int) drvHostSerialWakeupRecvThread(PPDMDRVINS pDrvIns, PPDMTHREAD /*pThread*/)
|
---|
856 | {
|
---|
857 | PDRVHOSTSERIAL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTSERIAL);
|
---|
858 | #if defined(RT_OS_LINUX) || defined(RT_OS_DARWIN) || defined(RT_OS_SOLARIS) || defined(RT_OS_FREEBSD)
|
---|
859 | size_t cbIgnored;
|
---|
860 | return RTPipeWrite(pThis->hWakeupPipeW, "", 1, &cbIgnored);
|
---|
861 |
|
---|
862 | #elif defined(RT_OS_WINDOWS)
|
---|
863 | if (!SetEvent(pThis->hHaltEventSem))
|
---|
864 | return RTErrConvertFromWin32(GetLastError());
|
---|
865 | return VINF_SUCCESS;
|
---|
866 | #else
|
---|
867 | # error adapt me!
|
---|
868 | #endif
|
---|
869 | }
|
---|
870 |
|
---|
871 | #if defined(RT_OS_LINUX) || defined(RT_OS_DARWIN) || defined(RT_OS_SOLARIS) || defined(RT_OS_FREEBSD)
|
---|
872 | /* -=-=-=-=- Monitor thread -=-=-=-=- */
|
---|
873 |
|
---|
874 | /**
|
---|
875 | * Monitor thread loop.
|
---|
876 | *
|
---|
877 | * This thread monitors the status lines and notifies the device
|
---|
878 | * if they change.
|
---|
879 | *
|
---|
880 | * @returns VINF_SUCCESS.
|
---|
881 | * @param ThreadSelf Thread handle to this thread.
|
---|
882 | * @param pvUser User argument.
|
---|
883 | */
|
---|
884 | static DECLCALLBACK(int) drvHostSerialMonitorThread(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
|
---|
885 | {
|
---|
886 | PDRVHOSTSERIAL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTSERIAL);
|
---|
887 | int rc = VINF_SUCCESS;
|
---|
888 | unsigned long const uStatusLinesToCheck = TIOCM_CAR | TIOCM_RNG | TIOCM_DSR | TIOCM_CTS;
|
---|
889 |
|
---|
890 | if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
|
---|
891 | return VINF_SUCCESS;
|
---|
892 |
|
---|
893 | do
|
---|
894 | {
|
---|
895 | unsigned int statusLines;
|
---|
896 |
|
---|
897 | /*
|
---|
898 | * Get the status line state.
|
---|
899 | */
|
---|
900 | rc = ioctl(RTFileToNative(pThis->hDeviceFile), TIOCMGET, &statusLines);
|
---|
901 | if (rc < 0)
|
---|
902 | {
|
---|
903 | PDMDrvHlpVMSetRuntimeError(pDrvIns, 0 /*fFlags*/, "DrvHostSerialFail",
|
---|
904 | N_("Ioctl failed for serial host device '%s' (%Rrc). The device will not work properly"),
|
---|
905 | pThis->pszDevicePath, RTErrConvertFromErrno(errno));
|
---|
906 | break;
|
---|
907 | }
|
---|
908 |
|
---|
909 | uint32_t newStatusLine = 0;
|
---|
910 |
|
---|
911 | if (statusLines & TIOCM_CAR)
|
---|
912 | newStatusLine |= PDMICHARPORT_STATUS_LINES_DCD;
|
---|
913 | if (statusLines & TIOCM_RNG)
|
---|
914 | newStatusLine |= PDMICHARPORT_STATUS_LINES_RI;
|
---|
915 | if (statusLines & TIOCM_DSR)
|
---|
916 | newStatusLine |= PDMICHARPORT_STATUS_LINES_DSR;
|
---|
917 | if (statusLines & TIOCM_CTS)
|
---|
918 | newStatusLine |= PDMICHARPORT_STATUS_LINES_CTS;
|
---|
919 | pThis->pDrvCharPort->pfnNotifyStatusLinesChanged(pThis->pDrvCharPort, newStatusLine);
|
---|
920 |
|
---|
921 | if (PDMTHREADSTATE_RUNNING != pThread->enmState)
|
---|
922 | break;
|
---|
923 |
|
---|
924 | # ifdef RT_OS_LINUX
|
---|
925 | /*
|
---|
926 | * Wait for status line change.
|
---|
927 | *
|
---|
928 | * XXX In Linux, if a thread calls tcsetattr while the monitor thread is
|
---|
929 | * waiting in ioctl for a modem status change then 8250.c wrongly disables
|
---|
930 | * modem irqs and so the monitor thread never gets released. The workaround
|
---|
931 | * is to send a signal after each tcsetattr.
|
---|
932 | */
|
---|
933 | ioctl(RTFileToNative(pThis->hDeviceFile), TIOCMIWAIT, uStatusLinesToCheck);
|
---|
934 | # else
|
---|
935 | /* Poll for status line change. */
|
---|
936 | if (!((statusLines ^ pThis->fStatusLines) & uStatusLinesToCheck))
|
---|
937 | PDMR3ThreadSleep(pThread, 500); /* 0.5 sec */
|
---|
938 | pThis->fStatusLines = statusLines;
|
---|
939 | # endif
|
---|
940 | }
|
---|
941 | while (PDMTHREADSTATE_RUNNING == pThread->enmState);
|
---|
942 |
|
---|
943 | return VINF_SUCCESS;
|
---|
944 | }
|
---|
945 |
|
---|
946 | /**
|
---|
947 | * Unblock the monitor thread so it can respond to a state change.
|
---|
948 | * We need to execute this code exactly once during initialization.
|
---|
949 | * But we don't want to block --- therefore this dedicated thread.
|
---|
950 | *
|
---|
951 | * @returns a VBox status code.
|
---|
952 | * @param pDrvIns The driver instance.
|
---|
953 | * @param pThread The send thread.
|
---|
954 | */
|
---|
955 | static DECLCALLBACK(int) drvHostSerialWakeupMonitorThread(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
|
---|
956 | {
|
---|
957 | # ifdef RT_OS_LINUX
|
---|
958 | PDRVHOSTSERIAL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTSERIAL);
|
---|
959 | int rc = VINF_SUCCESS;
|
---|
960 |
|
---|
961 | rc = RTThreadPoke(pThread->Thread);
|
---|
962 | if (RT_FAILURE(rc))
|
---|
963 | PDMDrvHlpVMSetRuntimeError(pDrvIns, 0 /*fFlags*/, "DrvHostSerialFail",
|
---|
964 | N_("Suspending serial monitor thread failed for serial device '%s' (%Rrc). The shutdown may take longer than expected"),
|
---|
965 | pThis->pszDevicePath, RTErrConvertFromErrno(rc));
|
---|
966 |
|
---|
967 | # else /* !RT_OS_LINUX*/
|
---|
968 |
|
---|
969 | /* In polling mode there is nobody to wake up (PDMThread will cancel the sleep). */
|
---|
970 | NOREF(pDrvIns);
|
---|
971 | NOREF(pThread);
|
---|
972 |
|
---|
973 | # endif /* RT_OS_LINUX */
|
---|
974 |
|
---|
975 | return VINF_SUCCESS;
|
---|
976 | }
|
---|
977 | #endif /* RT_OS_LINUX || RT_OS_DARWIN || RT_OS_SOLARIS */
|
---|
978 |
|
---|
979 | /**
|
---|
980 | * Set the modem lines.
|
---|
981 | *
|
---|
982 | * @returns VBox status code
|
---|
983 | * @param pInterface Pointer to the interface structure.
|
---|
984 | * @param RequestToSend Set to true if this control line should be made active.
|
---|
985 | * @param DataTerminalReady Set to true if this control line should be made active.
|
---|
986 | */
|
---|
987 | static DECLCALLBACK(int) drvHostSerialSetModemLines(PPDMICHARCONNECTOR pInterface, bool RequestToSend, bool DataTerminalReady)
|
---|
988 | {
|
---|
989 | PDRVHOSTSERIAL pThis = PDMICHAR_2_DRVHOSTSERIAL(pInterface);
|
---|
990 |
|
---|
991 | #if defined(RT_OS_LINUX) || defined(RT_OS_DARWIN) || defined(RT_OS_SOLARIS) || defined(RT_OS_FREEBSD)
|
---|
992 | int modemStateSet = 0;
|
---|
993 | int modemStateClear = 0;
|
---|
994 |
|
---|
995 | if (RequestToSend)
|
---|
996 | modemStateSet |= TIOCM_RTS;
|
---|
997 | else
|
---|
998 | modemStateClear |= TIOCM_RTS;
|
---|
999 |
|
---|
1000 | if (DataTerminalReady)
|
---|
1001 | modemStateSet |= TIOCM_DTR;
|
---|
1002 | else
|
---|
1003 | modemStateClear |= TIOCM_DTR;
|
---|
1004 |
|
---|
1005 | if (modemStateSet)
|
---|
1006 | ioctl(RTFileToNative(pThis->hDeviceFile), TIOCMBIS, &modemStateSet);
|
---|
1007 |
|
---|
1008 | if (modemStateClear)
|
---|
1009 | ioctl(RTFileToNative(pThis->hDeviceFile), TIOCMBIC, &modemStateClear);
|
---|
1010 |
|
---|
1011 | #elif defined(RT_OS_WINDOWS)
|
---|
1012 | if (RequestToSend)
|
---|
1013 | EscapeCommFunction(pThis->hDeviceFile, SETRTS);
|
---|
1014 | else
|
---|
1015 | EscapeCommFunction(pThis->hDeviceFile, CLRRTS);
|
---|
1016 |
|
---|
1017 | if (DataTerminalReady)
|
---|
1018 | EscapeCommFunction(pThis->hDeviceFile, SETDTR);
|
---|
1019 | else
|
---|
1020 | EscapeCommFunction(pThis->hDeviceFile, CLRDTR);
|
---|
1021 |
|
---|
1022 | #endif
|
---|
1023 |
|
---|
1024 | return VINF_SUCCESS;
|
---|
1025 | }
|
---|
1026 |
|
---|
1027 | /**
|
---|
1028 | * Sets the TD line into break condition.
|
---|
1029 | *
|
---|
1030 | * @returns VBox status code.
|
---|
1031 | * @param pInterface Pointer to the interface structure containing the called function pointer.
|
---|
1032 | * @param fBreak Set to true to let the device send a break false to put into normal operation.
|
---|
1033 | * @thread Any thread.
|
---|
1034 | */
|
---|
1035 | static DECLCALLBACK(int) drvHostSerialSetBreak(PPDMICHARCONNECTOR pInterface, bool fBreak)
|
---|
1036 | {
|
---|
1037 | PDRVHOSTSERIAL pThis = PDMICHAR_2_DRVHOSTSERIAL(pInterface);
|
---|
1038 |
|
---|
1039 | #if defined(RT_OS_LINUX) || defined(RT_OS_DARWIN) || defined(RT_OS_SOLARIS) || defined(RT_OS_FREEBSD)
|
---|
1040 | if (fBreak)
|
---|
1041 | ioctl(RTFileToNative(pThis->hDeviceFile), TIOCSBRK);
|
---|
1042 | else
|
---|
1043 | ioctl(RTFileToNative(pThis->hDeviceFile), TIOCCBRK);
|
---|
1044 |
|
---|
1045 | #elif defined(RT_OS_WINDOWS)
|
---|
1046 | if (fBreak)
|
---|
1047 | SetCommBreak(pThis->hDeviceFile);
|
---|
1048 | else
|
---|
1049 | ClearCommBreak(pThis->hDeviceFile);
|
---|
1050 | #endif
|
---|
1051 |
|
---|
1052 | return VINF_SUCCESS;
|
---|
1053 | }
|
---|
1054 |
|
---|
1055 | /* -=-=-=-=- driver interface -=-=-=-=- */
|
---|
1056 |
|
---|
1057 | /**
|
---|
1058 | * Destruct a char driver instance.
|
---|
1059 | *
|
---|
1060 | * Most VM resources are freed by the VM. This callback is provided so that
|
---|
1061 | * any non-VM resources can be freed correctly.
|
---|
1062 | *
|
---|
1063 | * @param pDrvIns The driver instance data.
|
---|
1064 | */
|
---|
1065 | static DECLCALLBACK(void) drvHostSerialDestruct(PPDMDRVINS pDrvIns)
|
---|
1066 | {
|
---|
1067 | PDRVHOSTSERIAL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTSERIAL);
|
---|
1068 | LogFlow(("%s: iInstance=%d\n", __FUNCTION__, pDrvIns->iInstance));
|
---|
1069 | PDMDRV_CHECK_VERSIONS_RETURN_VOID(pDrvIns);
|
---|
1070 |
|
---|
1071 | /* Empty the send queue */
|
---|
1072 | RTSemEventDestroy(pThis->SendSem);
|
---|
1073 | pThis->SendSem = NIL_RTSEMEVENT;
|
---|
1074 |
|
---|
1075 | int rc;
|
---|
1076 | #if defined(RT_OS_LINUX) || defined(RT_OS_DARWIN) || defined(RT_OS_SOLARIS) || defined(RT_OS_FREEBSD)
|
---|
1077 |
|
---|
1078 | rc = RTPipeClose(pThis->hWakeupPipeW); AssertRC(rc);
|
---|
1079 | pThis->hWakeupPipeW = NIL_RTPIPE;
|
---|
1080 | rc = RTPipeClose(pThis->hWakeupPipeR); AssertRC(rc);
|
---|
1081 | pThis->hWakeupPipeR = NIL_RTPIPE;
|
---|
1082 |
|
---|
1083 | # if defined(RT_OS_DARWIN)
|
---|
1084 | if (pThis->hDeviceFileR != NIL_RTFILE)
|
---|
1085 | {
|
---|
1086 | if (pThis->hDeviceFileR != pThis->hDeviceFile)
|
---|
1087 | {
|
---|
1088 | rc = RTFileClose(pThis->hDeviceFileR);
|
---|
1089 | AssertRC(rc);
|
---|
1090 | }
|
---|
1091 | pThis->hDeviceFileR = NIL_RTFILE;
|
---|
1092 | }
|
---|
1093 | # endif
|
---|
1094 | rc = RTFileClose(pThis->hDeviceFile); AssertRC(rc);
|
---|
1095 | pThis->hDeviceFile = NIL_RTFILE;
|
---|
1096 |
|
---|
1097 | #elif defined(RT_OS_WINDOWS)
|
---|
1098 | CloseHandle(pThis->hEventRecv);
|
---|
1099 | CloseHandle(pThis->hEventSend);
|
---|
1100 | CancelIo(pThis->hDeviceFile);
|
---|
1101 | CloseHandle(pThis->hDeviceFile);
|
---|
1102 |
|
---|
1103 | #endif
|
---|
1104 |
|
---|
1105 | if (pThis->pszDevicePath)
|
---|
1106 | {
|
---|
1107 | MMR3HeapFree(pThis->pszDevicePath);
|
---|
1108 | pThis->pszDevicePath = NULL;
|
---|
1109 | }
|
---|
1110 | }
|
---|
1111 |
|
---|
1112 | /**
|
---|
1113 | * Construct a char driver instance.
|
---|
1114 | *
|
---|
1115 | * @copydoc FNPDMDRVCONSTRUCT
|
---|
1116 | */
|
---|
1117 | static DECLCALLBACK(int) drvHostSerialConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t /*fFlags*/)
|
---|
1118 | {
|
---|
1119 | PDRVHOSTSERIAL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTSERIAL);
|
---|
1120 | LogFlow(("%s: iInstance=%d\n", __FUNCTION__, pDrvIns->iInstance));
|
---|
1121 | PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns);
|
---|
1122 |
|
---|
1123 | /*
|
---|
1124 | * Init basic data members and interfaces.
|
---|
1125 | */
|
---|
1126 | #if defined(RT_OS_LINUX) || defined(RT_OS_DARWIN) || defined(RT_OS_SOLARIS) || defined(RT_OS_FREEBSD)
|
---|
1127 | pThis->hDeviceFile = NIL_RTFILE;
|
---|
1128 | # ifdef RT_OS_DARWIN
|
---|
1129 | pThis->hDeviceFileR = NIL_RTFILE;
|
---|
1130 | # endif
|
---|
1131 | pThis->hWakeupPipeR = NIL_RTPIPE;
|
---|
1132 | pThis->hWakeupPipeW = NIL_RTPIPE;
|
---|
1133 | #elif defined(RT_OS_WINDOWS)
|
---|
1134 | pThis->hEventRecv = INVALID_HANDLE_VALUE;
|
---|
1135 | pThis->hEventSend = INVALID_HANDLE_VALUE;
|
---|
1136 | pThis->hDeviceFile = INVALID_HANDLE_VALUE;
|
---|
1137 | #endif
|
---|
1138 | /* IBase. */
|
---|
1139 | pDrvIns->IBase.pfnQueryInterface = drvHostSerialQueryInterface;
|
---|
1140 | /* ICharConnector. */
|
---|
1141 | pThis->ICharConnector.pfnWrite = drvHostSerialWrite;
|
---|
1142 | pThis->ICharConnector.pfnSetParameters = drvHostSerialSetParameters;
|
---|
1143 | pThis->ICharConnector.pfnSetModemLines = drvHostSerialSetModemLines;
|
---|
1144 | pThis->ICharConnector.pfnSetBreak = drvHostSerialSetBreak;
|
---|
1145 |
|
---|
1146 | /** @todo Initialize all members with NIL values!! The destructor is ALWAYS called. */
|
---|
1147 |
|
---|
1148 | /*
|
---|
1149 | * Query configuration.
|
---|
1150 | */
|
---|
1151 | /* Device */
|
---|
1152 | int rc = CFGMR3QueryStringAlloc(pCfg, "DevicePath", &pThis->pszDevicePath);
|
---|
1153 | if (RT_FAILURE(rc))
|
---|
1154 | {
|
---|
1155 | AssertMsgFailed(("Configuration error: query for \"DevicePath\" string returned %Rra.\n", rc));
|
---|
1156 | return rc;
|
---|
1157 | }
|
---|
1158 |
|
---|
1159 | /*
|
---|
1160 | * Open the device
|
---|
1161 | */
|
---|
1162 | #ifdef RT_OS_WINDOWS
|
---|
1163 |
|
---|
1164 | pThis->hHaltEventSem = CreateEvent(NULL, FALSE, FALSE, NULL);
|
---|
1165 | AssertReturn(pThis->hHaltEventSem != NULL, VERR_NO_MEMORY);
|
---|
1166 |
|
---|
1167 | pThis->hEventRecv = CreateEvent(NULL, FALSE, FALSE, NULL);
|
---|
1168 | AssertReturn(pThis->hEventRecv != NULL, VERR_NO_MEMORY);
|
---|
1169 |
|
---|
1170 | pThis->hEventSend = CreateEvent(NULL, FALSE, FALSE, NULL);
|
---|
1171 | AssertReturn(pThis->hEventSend != NULL, VERR_NO_MEMORY);
|
---|
1172 |
|
---|
1173 | HANDLE hFile = CreateFile(pThis->pszDevicePath,
|
---|
1174 | GENERIC_READ | GENERIC_WRITE,
|
---|
1175 | 0, // must be opened with exclusive access
|
---|
1176 | NULL, // no SECURITY_ATTRIBUTES structure
|
---|
1177 | OPEN_EXISTING, // must use OPEN_EXISTING
|
---|
1178 | FILE_FLAG_OVERLAPPED, // overlapped I/O
|
---|
1179 | NULL); // no template file
|
---|
1180 | if (hFile == INVALID_HANDLE_VALUE)
|
---|
1181 | rc = RTErrConvertFromWin32(GetLastError());
|
---|
1182 | else
|
---|
1183 | {
|
---|
1184 | pThis->hDeviceFile = hFile;
|
---|
1185 | /* for overlapped read */
|
---|
1186 | if (!SetCommMask(hFile, EV_RXCHAR | EV_CTS | EV_DSR | EV_RING | EV_RLSD))
|
---|
1187 | {
|
---|
1188 | LogRel(("HostSerial#%d: SetCommMask failed with error %d.\n", pDrvIns->iInstance, GetLastError()));
|
---|
1189 | return VERR_FILE_IO_ERROR;
|
---|
1190 | }
|
---|
1191 | rc = VINF_SUCCESS;
|
---|
1192 | }
|
---|
1193 |
|
---|
1194 | #else /* !RT_OS_WINDOWS */
|
---|
1195 |
|
---|
1196 | uint32_t fOpen = RTFILE_O_READWRITE | RTFILE_O_OPEN | RTFILE_O_DENY_NONE;
|
---|
1197 | # ifdef RT_OS_LINUX
|
---|
1198 | /* This seems to be necessary on some Linux hosts, otherwise we hang here forever. */
|
---|
1199 | fOpen |= RTFILE_O_NON_BLOCK;
|
---|
1200 | # endif
|
---|
1201 | rc = RTFileOpen(&pThis->hDeviceFile, pThis->pszDevicePath, fOpen);
|
---|
1202 | # ifdef RT_OS_LINUX
|
---|
1203 | /* RTFILE_O_NON_BLOCK not supported? */
|
---|
1204 | if (rc == VERR_INVALID_PARAMETER)
|
---|
1205 | rc = RTFileOpen(&pThis->hDeviceFile, pThis->pszDevicePath, fOpen & ~RTFILE_O_NON_BLOCK);
|
---|
1206 | # endif
|
---|
1207 | # ifdef RT_OS_DARWIN
|
---|
1208 | if (RT_SUCCESS(rc))
|
---|
1209 | rc = RTFileOpen(&pThis->hDeviceFileR, pThis->pszDevicePath, RTFILE_O_READ | RTFILE_O_OPEN | RTFILE_O_DENY_NONE);
|
---|
1210 | # endif
|
---|
1211 |
|
---|
1212 |
|
---|
1213 | #endif /* !RT_OS_WINDOWS */
|
---|
1214 |
|
---|
1215 | if (RT_FAILURE(rc))
|
---|
1216 | {
|
---|
1217 | AssertMsgFailed(("Could not open host device %s, rc=%Rrc\n", pThis->pszDevicePath, rc));
|
---|
1218 | switch (rc)
|
---|
1219 | {
|
---|
1220 | case VERR_ACCESS_DENIED:
|
---|
1221 | return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS,
|
---|
1222 | #if defined(RT_OS_LINUX) || defined(RT_OS_DARWIN) || defined(RT_OS_SOLARIS) || defined(RT_OS_FREEBSD)
|
---|
1223 | N_("Cannot open host device '%s' for read/write access. Check the permissions "
|
---|
1224 | "of that device ('/bin/ls -l %s'): Most probably you need to be member "
|
---|
1225 | "of the device group. Make sure that you logout/login after changing "
|
---|
1226 | "the group settings of the current user"),
|
---|
1227 | #else
|
---|
1228 | N_("Cannot open host device '%s' for read/write access. Check the permissions "
|
---|
1229 | "of that device"),
|
---|
1230 | #endif
|
---|
1231 | pThis->pszDevicePath, pThis->pszDevicePath);
|
---|
1232 | default:
|
---|
1233 | return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS,
|
---|
1234 | N_("Failed to open host device '%s'"),
|
---|
1235 | pThis->pszDevicePath);
|
---|
1236 | }
|
---|
1237 | }
|
---|
1238 |
|
---|
1239 | /* Set to non blocking I/O */
|
---|
1240 | #if defined(RT_OS_LINUX) || defined(RT_OS_DARWIN) || defined(RT_OS_SOLARIS) || defined(RT_OS_FREEBSD)
|
---|
1241 |
|
---|
1242 | fcntl(RTFileToNative(pThis->hDeviceFile), F_SETFL, O_NONBLOCK);
|
---|
1243 | # ifdef RT_OS_DARWIN
|
---|
1244 | fcntl(RTFileToNative(pThis->hDeviceFileR), F_SETFL, O_NONBLOCK);
|
---|
1245 | # endif
|
---|
1246 | rc = RTPipeCreate(&pThis->hWakeupPipeR, &pThis->hWakeupPipeW, 0 /*fFlags*/);
|
---|
1247 | AssertRCReturn(rc, rc);
|
---|
1248 |
|
---|
1249 | #elif defined(RT_OS_WINDOWS)
|
---|
1250 |
|
---|
1251 | /* Set the COMMTIMEOUTS to get non blocking I/O */
|
---|
1252 | COMMTIMEOUTS comTimeout;
|
---|
1253 |
|
---|
1254 | comTimeout.ReadIntervalTimeout = MAXDWORD;
|
---|
1255 | comTimeout.ReadTotalTimeoutMultiplier = 0;
|
---|
1256 | comTimeout.ReadTotalTimeoutConstant = 0;
|
---|
1257 | comTimeout.WriteTotalTimeoutMultiplier = 0;
|
---|
1258 | comTimeout.WriteTotalTimeoutConstant = 0;
|
---|
1259 |
|
---|
1260 | SetCommTimeouts(pThis->hDeviceFile, &comTimeout);
|
---|
1261 |
|
---|
1262 | #endif
|
---|
1263 |
|
---|
1264 | /*
|
---|
1265 | * Get the ICharPort interface of the above driver/device.
|
---|
1266 | */
|
---|
1267 | pThis->pDrvCharPort = PDMIBASE_QUERY_INTERFACE(pDrvIns->pUpBase, PDMICHARPORT);
|
---|
1268 | if (!pThis->pDrvCharPort)
|
---|
1269 | return PDMDrvHlpVMSetError(pDrvIns, VERR_PDM_MISSING_INTERFACE_ABOVE, RT_SRC_POS, N_("HostSerial#%d has no char port interface above"), pDrvIns->iInstance);
|
---|
1270 |
|
---|
1271 | /*
|
---|
1272 | * Create the receive, send and monitor threads plus the related send semaphore.
|
---|
1273 | */
|
---|
1274 | rc = PDMDrvHlpThreadCreate(pDrvIns, &pThis->pRecvThread, pThis, drvHostSerialRecvThread, drvHostSerialWakeupRecvThread, 0, RTTHREADTYPE_IO, "SerRecv");
|
---|
1275 | if (RT_FAILURE(rc))
|
---|
1276 | return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS, N_("HostSerial#%d cannot create receive thread"), pDrvIns->iInstance);
|
---|
1277 |
|
---|
1278 | rc = RTSemEventCreate(&pThis->SendSem);
|
---|
1279 | AssertRC(rc);
|
---|
1280 |
|
---|
1281 | rc = PDMDrvHlpThreadCreate(pDrvIns, &pThis->pSendThread, pThis, drvHostSerialSendThread, drvHostSerialWakeupSendThread, 0, RTTHREADTYPE_IO, "SerSend");
|
---|
1282 | if (RT_FAILURE(rc))
|
---|
1283 | return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS, N_("HostSerial#%d cannot create send thread"), pDrvIns->iInstance);
|
---|
1284 |
|
---|
1285 | #if defined(RT_OS_LINUX) || defined(RT_OS_DARWIN) || defined(RT_OS_SOLARIS) || defined(RT_OS_FREEBSD)
|
---|
1286 | /* Linux & darwin needs a separate thread which monitors the status lines. */
|
---|
1287 | # ifndef RT_OS_LINUX
|
---|
1288 | ioctl(RTFileToNative(pThis->hDeviceFile), TIOCMGET, &pThis->fStatusLines);
|
---|
1289 | # endif
|
---|
1290 | rc = PDMDrvHlpThreadCreate(pDrvIns, &pThis->pMonitorThread, pThis, drvHostSerialMonitorThread, drvHostSerialWakeupMonitorThread, 0, RTTHREADTYPE_IO, "SerMon");
|
---|
1291 | if (RT_FAILURE(rc))
|
---|
1292 | return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS, N_("HostSerial#%d cannot create monitor thread"), pDrvIns->iInstance);
|
---|
1293 | #endif
|
---|
1294 |
|
---|
1295 | /*
|
---|
1296 | * Register release statistics.
|
---|
1297 | */
|
---|
1298 | PDMDrvHlpSTAMRegisterF(pDrvIns, &pThis->StatBytesWritten, STAMTYPE_COUNTER, STAMVISIBILITY_USED, STAMUNIT_BYTES, "Nr of bytes written", "/Devices/HostSerial%d/Written", pDrvIns->iInstance);
|
---|
1299 | PDMDrvHlpSTAMRegisterF(pDrvIns, &pThis->StatBytesRead, STAMTYPE_COUNTER, STAMVISIBILITY_USED, STAMUNIT_BYTES, "Nr of bytes read", "/Devices/HostSerial%d/Read", pDrvIns->iInstance);
|
---|
1300 | #ifdef RT_OS_DARWIN /* new Write code, not darwin specific. */
|
---|
1301 | PDMDrvHlpSTAMRegisterF(pDrvIns, &pThis->StatSendOverflows, STAMTYPE_COUNTER, STAMVISIBILITY_USED, STAMUNIT_BYTES, "Nr of bytes overflowed", "/Devices/HostSerial%d/SendOverflow", pDrvIns->iInstance);
|
---|
1302 | #endif
|
---|
1303 |
|
---|
1304 | return VINF_SUCCESS;
|
---|
1305 | }
|
---|
1306 |
|
---|
1307 | /**
|
---|
1308 | * Char driver registration record.
|
---|
1309 | */
|
---|
1310 | const PDMDRVREG g_DrvHostSerial =
|
---|
1311 | {
|
---|
1312 | /* u32Version */
|
---|
1313 | PDM_DRVREG_VERSION,
|
---|
1314 | /* szName */
|
---|
1315 | "Host Serial",
|
---|
1316 | /* szRCMod */
|
---|
1317 | "",
|
---|
1318 | /* szR0Mod */
|
---|
1319 | "",
|
---|
1320 | /* pszDescription */
|
---|
1321 | "Host serial driver.",
|
---|
1322 | /* fFlags */
|
---|
1323 | PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
|
---|
1324 | /* fClass. */
|
---|
1325 | PDM_DRVREG_CLASS_CHAR,
|
---|
1326 | /* cMaxInstances */
|
---|
1327 | ~0U,
|
---|
1328 | /* cbInstance */
|
---|
1329 | sizeof(DRVHOSTSERIAL),
|
---|
1330 | /* pfnConstruct */
|
---|
1331 | drvHostSerialConstruct,
|
---|
1332 | /* pfnDestruct */
|
---|
1333 | drvHostSerialDestruct,
|
---|
1334 | /* pfnRelocate */
|
---|
1335 | NULL,
|
---|
1336 | /* pfnIOCtl */
|
---|
1337 | NULL,
|
---|
1338 | /* pfnPowerOn */
|
---|
1339 | NULL,
|
---|
1340 | /* pfnReset */
|
---|
1341 | NULL,
|
---|
1342 | /* pfnSuspend */
|
---|
1343 | NULL,
|
---|
1344 | /* pfnResume */
|
---|
1345 | NULL,
|
---|
1346 | /* pfnAttach */
|
---|
1347 | NULL,
|
---|
1348 | /* pfnDetach */
|
---|
1349 | NULL,
|
---|
1350 | /* pfnPowerOff */
|
---|
1351 | NULL,
|
---|
1352 | /* pfnSoftReset */
|
---|
1353 | NULL,
|
---|
1354 | /* u32EndVersion */
|
---|
1355 | PDM_DRVREG_VERSION
|
---|
1356 | };
|
---|
1357 |
|
---|