1 | /* $Rev: 21069 $ */
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2 | /** @file
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3 | * VBoxGuest - Linux specifics.
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4 | *
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5 | * Note. Unfortunately, the difference between this and SUPDrv-linux.c is
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6 | * a little bit too big to be helpful.
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7 | */
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8 |
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9 | /*
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10 | * Copyright (C) 2006-2009 Sun Microsystems, Inc.
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11 | *
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12 | * This file is part of VirtualBox Open Source Edition (OSE), as
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13 | * available from http://www.virtualbox.org. This file is free software;
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14 | * you can redistribute it and/or modify it under the terms of the GNU
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15 | * General Public License (GPL) as published by the Free Software
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16 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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17 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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18 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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19 | *
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20 | * The contents of this file may alternatively be used under the terms
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21 | * of the Common Development and Distribution License Version 1.0
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22 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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23 | * VirtualBox OSE distribution, in which case the provisions of the
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24 | * CDDL are applicable instead of those of the GPL.
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25 | *
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26 | * You may elect to license modified versions of this file under the
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27 | * terms and conditions of either the GPL or the CDDL or both.
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28 | *
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29 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
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30 | * Clara, CA 95054 USA or visit http://www.sun.com if you need
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31 | * additional information or have any questions.
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32 | * Some lines of code to disable the local APIC on x86_64 machines taken
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33 | * from a Mandriva patch by Gwenole Beauchesne <gbeauchesne@mandriva.com>.
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34 | */
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35 |
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36 | /*******************************************************************************
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37 | * Header Files *
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38 | *******************************************************************************/
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39 | #define LOG_GROUP LOG_GROUP_SUP_DRV
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40 | #include "VBoxGuestInternal.h"
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41 | #include "the-linux-kernel.h"
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42 | #include <linux/miscdevice.h>
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43 | #include "version-generated.h"
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44 |
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45 | #include <iprt/assert.h>
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46 | #include <iprt/spinlock.h>
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47 | #include <iprt/semaphore.h>
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48 | #include <iprt/initterm.h>
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49 | #include <iprt/process.h>
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50 | #include <iprt/err.h>
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51 | #include <iprt/mem.h>
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52 | #include <VBox/log.h>
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53 | #include <iprt/mp.h>
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54 | #include <iprt/mem.h>
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55 |
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56 |
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57 | #define xstr(s) str(s)
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58 | #define str(s) #s
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59 |
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60 | /** The device name. */
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61 | #define DEVICE_NAME "vboxguest"
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62 | /** The device name for the device node open to everyone.. */
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63 | #define DEVICE_NAME_USER "vboxuser"
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64 |
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65 |
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66 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 20)
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67 | # define PCI_DEV_GET(v,d,p) pci_get_device(v,d,p)
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68 | # define PCI_DEV_PUT(x) pci_dev_put(x)
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69 | #else
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70 | # define PCI_DEV_GET(v,d,p) pci_find_device(v,d,p)
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71 | # define PCI_DEV_PUT(x) do {} while(0)
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72 | #endif
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73 |
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74 | /* 2.4.x compatability macros that may or may not be defined. */
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75 | #ifndef IRQ_RETVAL
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76 | # define irqreturn_t void
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77 | # define IRQ_RETVAL(n)
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78 | #endif
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79 |
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80 |
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81 | /*******************************************************************************
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82 | * Internal Functions *
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83 | *******************************************************************************/
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84 | static int vboxguestLinuxModInit(void);
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85 | static void vboxguestLinuxModExit(void);
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86 | static int vboxguestLinuxOpen(struct inode *pInode, struct file *pFilp);
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87 | static int vboxguestLinuxRelease(struct inode *pInode, struct file *pFilp);
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88 | #ifdef HAVE_UNLOCKED_IOCTL
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89 | static long vboxguestLinuxIOCtl(struct file *pFilp, unsigned int uCmd, unsigned long ulArg);
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90 | #else
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91 | static int vboxguestLinuxIOCtl(struct inode *pInode, struct file *pFilp, unsigned int uCmd, unsigned long ulArg);
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92 | #endif
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93 |
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94 |
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95 | /*******************************************************************************
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96 | * Global Variables *
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97 | *******************************************************************************/
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98 | /**
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99 | * Device extention & session data association structure.
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100 | */
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101 | static VBOXGUESTDEVEXT g_DevExt;
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102 | /** The PCI device. */
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103 | static struct pci_dev *g_pPciDev;
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104 | /** The base of the I/O port range. */
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105 | static RTIOPORT g_IOPortBase;
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106 | /** The base of the MMIO range. */
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107 | static RTHCPHYS g_MMIOPhysAddr = NIL_RTHCPHYS;
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108 | /** The size of the MMIO range as seen by PCI. */
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109 | static uint32_t g_cbMMIO;
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110 | /** The pointer to the mapping of the MMIO range. */
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111 | static void *g_pvMMIOBase;
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112 |
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113 | /** Our file node major id.
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114 | * Either set dynamically at run time or statically at compile time. */
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115 | #ifdef CONFIG_VBOXADD_MAJOR
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116 | static unsigned int g_iModuleMajor = CONFIG_VBOXADD_MAJOR;
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117 | #else
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118 | static unsigned int g_iModuleMajor = 0;
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119 | #endif
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120 |
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121 |
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122 | /** The file_operations structure. */
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123 | static struct file_operations g_FileOps =
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124 | {
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125 | owner: THIS_MODULE,
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126 | open: vboxguestLinuxOpen,
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127 | release: vboxguestLinuxRelease,
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128 | #ifdef HAVE_UNLOCKED_IOCTL
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129 | unlocked_ioctl: vboxguestLinuxIOCtl,
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130 | #else
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131 | ioctl: vboxguestLinuxIOCtl,
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132 | #endif
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133 | };
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134 |
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135 | /** The miscdevice structure. */
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136 | static struct miscdevice g_MiscDevice =
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137 | {
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138 | minor: MISC_DYNAMIC_MINOR,
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139 | name: DEVICE_NAME,
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140 | fops: &g_FileOps,
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141 | #if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 17)
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142 | devfs_name: DEVICE_NAME,
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143 | #endif
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144 | };
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145 |
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146 | /** The file_operations structure for the user device.
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147 | * @remarks For the time being we'll be using the same implementation as
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148 | * /dev/vboxguest here. */
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149 | static struct file_operations g_FileOpsUser =
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150 | {
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151 | owner: THIS_MODULE,
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152 | open: vboxguestLinuxOpen,
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153 | release: vboxguestLinuxRelease,
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154 | #ifdef HAVE_UNLOCKED_IOCTL
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155 | unlocked_ioctl: vboxguestLinuxIOCtl,
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156 | #else
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157 | ioctl: vboxguestLinuxIOCtl,
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158 | #endif
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159 | };
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160 |
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161 | /** The miscdevice structure for the user device. */
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162 | static struct miscdevice g_MiscDeviceUser =
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163 | {
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164 | minor: MISC_DYNAMIC_MINOR,
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165 | name: DEVICE_NAME_USER,
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166 | fops: &g_FileOpsUser,
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167 | #if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 17)
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168 | devfs_name: DEVICE_NAME_USER,
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169 | #endif
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170 | };
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171 |
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172 |
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173 | /** PCI hotplug structure. */
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174 | static const struct pci_device_id __devinitdata g_VBoxGuestPciId[] =
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175 | {
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176 | {
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177 | vendor: VMMDEV_VENDORID,
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178 | device: VMMDEV_DEVICEID
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179 | },
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180 | {
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181 | /* empty entry */
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182 | }
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183 | };
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184 | MODULE_DEVICE_TABLE(pci, g_VBoxGuestPciId);
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185 |
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186 |
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187 | /**
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188 | * Converts a VBox status code to a linux error code.
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189 | *
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190 | * @returns corresponding negative linux error code.
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191 | * @param rc supdrv error code (SUPDRV_ERR_* defines).
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192 | */
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193 | static int vboxguestLinuxConvertToNegErrno(int rc)
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194 | {
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195 | if ( rc > -1000
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196 | && rc < 1000)
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197 | return -RTErrConvertToErrno(rc);
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198 | switch (rc)
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199 | {
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200 | case VERR_HGCM_SERVICE_NOT_FOUND: return -ESRCH;
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201 | case VINF_HGCM_CLIENT_REJECTED: return 0;
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202 | case VERR_HGCM_INVALID_CMD_ADDRESS: return -EFAULT;
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203 | case VINF_HGCM_ASYNC_EXECUTE: return 0;
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204 | case VERR_HGCM_INTERNAL: return -EPROTO;
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205 | case VERR_HGCM_INVALID_CLIENT_ID: return -EINVAL;
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206 | case VINF_HGCM_SAVE_STATE: return 0;
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207 | /* No reason to return this to a guest */
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208 | // case VERR_HGCM_SERVICE_EXISTS: return -EEXIST;
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209 | default:
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210 | AssertMsgFailed(("Unhandled error code %Rrc\n", rc));
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211 | return -EPROTO;
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212 | }
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213 | }
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214 |
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215 |
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216 |
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217 | /**
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218 | * Does the PCI detection and init of the device.
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219 | *
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220 | * @returns 0 on success, negated errno on failure.
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221 | */
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222 | static int __init vboxguestLinuxInitPci(void)
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223 | {
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224 | struct pci_dev *pPciDev;
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225 | int rc;
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226 |
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227 | pPciDev = PCI_DEV_GET(VMMDEV_VENDORID, VMMDEV_DEVICEID, NULL);
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228 | if (pPciDev)
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229 | {
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230 | rc = pci_enable_device(pPciDev);
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231 | if (rc >= 0)
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232 | {
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233 | /* I/O Ports are mandatory, the MMIO bit is not. */
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234 | if (pci_resource_start(pPciDev, 0) != 0)
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235 | {
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236 | /*
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237 | * Map the register address space.
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238 | */
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239 | g_MMIOPhysAddr = pci_resource_start(pPciDev, 1);
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240 | g_cbMMIO = pci_resource_len(pPciDev, 1);
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241 | g_IOPortBase = pci_resource_start(pPciDev, 0);
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242 | if (request_mem_region(g_MMIOPhysAddr, g_cbMMIO, DEVICE_NAME) != NULL)
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243 | {
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244 | g_pvMMIOBase = ioremap(g_MMIOPhysAddr, g_cbMMIO);
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245 | if (g_DevExt.pVMMDevMemory)
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246 | {
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247 | /** @todo why aren't we requesting ownership of the I/O ports as well? */
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248 | g_pPciDev = pPciDev;
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249 | return 0;
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250 | }
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251 |
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252 | /* failure cleanup path */
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253 | LogRel((DEVICE_NAME ": ioremap failed\n"));
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254 | rc = -ENOMEM;
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255 | release_mem_region(g_MMIOPhysAddr, g_cbMMIO);
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256 | }
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257 | else
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258 | {
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259 | LogRel((DEVICE_NAME ": failed to obtain adapter memory\n"));
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260 | rc = -EBUSY;
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261 | }
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262 | g_MMIOPhysAddr = NIL_RTHCPHYS;
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263 | g_cbMMIO = 0;
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264 | g_IOPortBase = 0;
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265 | }
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266 | else
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267 | {
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268 | LogRel((DEVICE_NAME ": did not find expected hardware resources\n"));
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269 | rc = -ENXIO;
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270 | }
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271 | pci_disable_device(pPciDev);
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272 | }
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273 | else
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274 | LogRel((DEVICE_NAME ": could not enable device: %d\n", rc));
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275 | PCI_DEV_PUT(pPciDev);
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276 | }
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277 | else
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278 | {
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279 | printk(KERN_ERR DEVICE_NAME ": VirtualBox Guest PCI device not found.\n");
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280 | rc = -ENODEV;
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281 | }
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282 | return rc;
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283 | }
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284 |
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285 |
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286 | /**
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287 | * Clean up the usage of the PCI device.
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288 | */
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289 | static void __exit vboxguestLinuxTermPci(void)
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290 | {
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291 | struct pci_dev *pPciDev = g_pPciDev;
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292 | g_pPciDev = NULL;
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293 | if (pPciDev)
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294 | {
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295 | iounmap(g_pvMMIOBase);
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296 | g_pvMMIOBase = NULL;
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297 |
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298 | release_mem_region(g_MMIOPhysAddr, g_cbMMIO);
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299 | g_MMIOPhysAddr = NIL_RTHCPHYS;
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300 | g_cbMMIO = 0;
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301 |
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302 | pci_disable_device(pPciDev);
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303 | }
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304 | }
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305 |
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306 |
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307 | /**
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308 | * Interrupt service routine.
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309 | *
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310 | * @returns In 2.4 it returns void.
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311 | * In 2.6 we indicate whether we've handled the IRQ or not.
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312 | *
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313 | * @param iIrq The IRQ number.
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314 | * @param pvDevId The device ID, a pointer to g_DevExt.
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315 | * @param pvRegs Register set. Removed in 2.6.19.
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316 | */
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317 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19)
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318 | static irqreturn_t vboxguestLinuxISR(int iIrrq, void *pvDevId)
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319 | #else
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320 | static irqreturn_t vboxguestLinuxISR(int iIrrq, void *pvDevId, struct pt_regs *pRegs)
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321 | #endif
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322 | {
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323 | bool fTaken = VBoxGuestCommonISR(&g_DevExt);
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324 | /** @todo if (vboxDev->irqAckRequest->events &
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325 | * VMMDEV_EVENT_MOUSE_POSITION_CHANGED)
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326 | * kill_fasync(&vboxDev->async_queue, SIGIO, POLL_IN);
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327 | */
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328 | return IRQ_RETVAL(fTaken);
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329 | }
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330 |
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331 |
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332 | /**
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333 | * Registers the ISR.
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334 | */
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335 | static int __init vboxguestLinuxInitISR(void)
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336 | {
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337 | int rc;
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338 |
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339 | rc = request_irq(g_pPciDev->irq,
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340 | vboxguestLinuxISR,
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341 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 20)
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342 | IRQF_SHARED,
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343 | #else
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344 | SA_SHIRQ,
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345 | #endif
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346 | DEVICE_NAME,
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347 | &g_DevExt);
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348 | if (rc)
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349 | {
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350 | LogRel((DEVICE_NAME ": could not request IRQ %d: err=%d\n", g_pPciDev->irq, rc));
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351 | return rc;
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352 | }
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353 | return 0;
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354 | }
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355 |
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356 |
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357 | /**
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358 | * Deregisters the ISR.
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359 | */
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360 | static void __exit vboxguestLinuxTermISR(void)
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361 | {
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362 | free_irq(g_pPciDev->irq, &g_DevExt);
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363 | }
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364 |
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365 |
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366 | /**
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367 | * Creates the device nodes.
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368 | *
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369 | * @returns 0 on success, negated errno on failure.
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370 | */
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371 | static int __init vboxguestLinuxInitDeviceNodes(void)
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372 | {
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373 | int rc;
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374 |
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375 | /*
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376 | * The full feature device node.
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377 | */
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378 | if (g_iModuleMajor > 0)
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379 | {
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380 | rc = register_chrdev(g_iModuleMajor, DEVICE_NAME, &g_FileOps);
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381 | if (rc < 0)
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382 | {
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383 | LogRel((DEVICE_NAME ": register_chrdev failed: g_iModuleMajor: %d, rc: %d\n", g_iModuleMajor, rc));
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384 | return rc;
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385 | }
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386 | }
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387 | else
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388 | {
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389 | rc = misc_register(&g_MiscDevice);
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390 | if (rc)
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391 | {
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392 | LogRel((DEVICE_NAME ": misc_register failed for %s (rc=%d)\n", DEVICE_NAME, rc));
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393 | return rc;
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394 | }
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395 | }
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396 |
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397 | /*
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398 | * The device node intended to be accessible by all users.
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399 | */
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400 | rc = misc_register(&g_MiscDeviceUser);
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401 | if (rc)
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402 | {
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403 | LogRel((DEVICE_NAME ": misc_register failed for %s (rc=%d)\n", DEVICE_NAME_USER, rc));
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404 | if (g_iModuleMajor > 0)
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405 | unregister_chrdev(g_iModuleMajor, DEVICE_NAME);
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406 | else
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407 | misc_deregister(&g_MiscDevice);
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408 | return rc;
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409 | }
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410 |
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411 | return 0;
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412 | }
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413 |
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414 |
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415 | /**
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416 | * Deregisters the device nodes.
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417 | */
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418 | static void __exit vboxguestLinuxTermDeviceNodes(void)
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419 | {
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420 | if (g_iModuleMajor > 0)
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421 | unregister_chrdev(g_iModuleMajor, DEVICE_NAME);
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422 | else
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423 | misc_deregister(&g_MiscDevice);
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424 | misc_deregister(&g_MiscDeviceUser);
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425 | }
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426 |
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427 |
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428 |
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429 | /**
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430 | * Initialize module.
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431 | *
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432 | * @returns appropriate status code.
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433 | */
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434 | static int __init vboxguestLinuxModInit(void)
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435 | {
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436 | int rc;
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437 |
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438 | /*
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439 | * Initialize IPRT first.
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440 | */
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441 | rc = RTR0Init(0);
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442 | if (RT_FAILURE(rc))
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443 | {
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444 | Log((DEVICE_NAME ": RTR0Init failed.\n"));
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445 | return -EINVAL;
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446 | }
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447 |
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448 | /*
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449 | * Locate and initialize the PCI device.
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450 | */
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451 | rc = vboxguestLinuxInitPci();
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452 | if (rc >= 0)
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453 | {
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454 | /*
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455 | * Register the interrupt service routine for it.
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456 | */
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457 | rc = vboxguestLinuxInitISR();
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458 | if (rc >= 0)
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459 | {
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460 | /*
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461 | * Call the common device extension initializer.
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462 | */
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463 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0) && defined(RT_ARCH_X86)
|
---|
464 | VBOXOSTYPE enmOSType = VBOXOSTYPE_Linux26;
|
---|
465 | #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0) && defined(RT_ARCH_AMD64)
|
---|
466 | VBOXOSTYPE enmOSType = VBOXOSTYPE_Linux26_x64;
|
---|
467 | #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 4, 0) && defined(RT_ARCH_X86)
|
---|
468 | VBOXOSTYPE enmOSType = VBOXOSTYPE_Linux24;
|
---|
469 | #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 4, 0) && defined(RT_ARCH_AMD64)
|
---|
470 | VBOXOSTYPE enmOSType = VBOXOSTYPE_Linux24_x64;
|
---|
471 | #else
|
---|
472 | # warning "huh? which arch + version is this?"
|
---|
473 | VBOXOSTYPE enmOsType = VBOXOSTYPE_Linux;
|
---|
474 | #endif
|
---|
475 | rc = VBoxGuestInitDevExt(&g_DevExt,
|
---|
476 | g_IOPortBase,
|
---|
477 | g_pvMMIOBase,
|
---|
478 | g_cbMMIO,
|
---|
479 | enmOSType);
|
---|
480 | if (RT_SUCCESS(rc))
|
---|
481 | {
|
---|
482 | /*
|
---|
483 | * Finally, create the device nodes.
|
---|
484 | */
|
---|
485 | rc = vboxguestLinuxInitDeviceNodes();
|
---|
486 | if (rc >= 0)
|
---|
487 | {
|
---|
488 | /* some useful information for the user but don't show this on the console */
|
---|
489 | LogRel(("VirtualBox device settings: major %d, IRQ %d, I/O port 0x%x, MMIO at 0x%x (size 0x%x)\n",
|
---|
490 | g_iModuleMajor, g_pPciDev->irq, g_IOPortBase, g_MMIOPhysAddr, g_cbMMIO));
|
---|
491 | printk(KERN_DEBUG DEVICE_NAME ": Successfully loaded version "
|
---|
492 | VBOX_VERSION_STRING " (interface " xstr(VMMDEV_VERSION) ")\n");
|
---|
493 | return rc;
|
---|
494 | }
|
---|
495 |
|
---|
496 | /* bail out */
|
---|
497 | VBoxGuestDeleteDevExt(&g_DevExt);
|
---|
498 | }
|
---|
499 | else
|
---|
500 | {
|
---|
501 | LogRel(( DEVICE_NAME ": VBoxGuestInitDevExt failed with rc=%Rrc\n", rc));
|
---|
502 | rc = RTErrConvertFromErrno(rc);
|
---|
503 | }
|
---|
504 | vboxguestLinuxTermISR();
|
---|
505 | }
|
---|
506 | vboxguestLinuxTermPci();
|
---|
507 | }
|
---|
508 | RTR0Term();
|
---|
509 | return rc;
|
---|
510 | }
|
---|
511 |
|
---|
512 |
|
---|
513 | /**
|
---|
514 | * Unload the module.
|
---|
515 | */
|
---|
516 | static void __exit vboxguestLinuxModExit(void)
|
---|
517 | {
|
---|
518 | /*
|
---|
519 | * Inverse order of init.
|
---|
520 | */
|
---|
521 | vboxguestLinuxTermDeviceNodes();
|
---|
522 | VBoxGuestDeleteDevExt(&g_DevExt);
|
---|
523 | vboxguestLinuxTermISR();
|
---|
524 | vboxguestLinuxTermPci();
|
---|
525 | RTR0Term();
|
---|
526 | }
|
---|
527 |
|
---|
528 |
|
---|
529 | /**
|
---|
530 | * Device open. Called on open /dev/vboxdrv
|
---|
531 | *
|
---|
532 | * @param pInode Pointer to inode info structure.
|
---|
533 | * @param pFilp Associated file pointer.
|
---|
534 | */
|
---|
535 | static int vboxguestLinuxOpen(struct inode *pInode, struct file *pFilp)
|
---|
536 | {
|
---|
537 | int rc;
|
---|
538 | PVBOXGUESTSESSION pSession;
|
---|
539 | Log((DEVICE_NAME ": pFilp=%p pid=%d/%d %s\n", pFilp, RTProcSelf(), current->pid, current->comm));
|
---|
540 |
|
---|
541 | /*
|
---|
542 | * Call common code to create the user session. Associate it with
|
---|
543 | * the file so we can access it in the other methods.
|
---|
544 | */
|
---|
545 | rc = VBoxGuestCreateUserSession(&g_DevExt, &pSession);
|
---|
546 | if (RT_SUCCESS(rc))
|
---|
547 | pFilp->private_data = pSession;
|
---|
548 |
|
---|
549 | Log(("vboxguestLinuxOpen: g_DevExt=%p pSession=%p rc=%d/%d (pid=%d/%d %s)\n",
|
---|
550 | &g_DevExt, pSession, rc, vboxguestLinuxConvertToNegErrno(rc),
|
---|
551 | RTProcSelf(), current->pid, current->comm));
|
---|
552 | return vboxguestLinuxConvertToNegErrno(rc);
|
---|
553 | }
|
---|
554 |
|
---|
555 |
|
---|
556 | /**
|
---|
557 | * Close device.
|
---|
558 | *
|
---|
559 | * @param pInode Pointer to inode info structure.
|
---|
560 | * @param pFilp Associated file pointer.
|
---|
561 | */
|
---|
562 | static int vboxguestLinuxRelease(struct inode *pInode, struct file *pFilp)
|
---|
563 | {
|
---|
564 | Log(("vboxguestLinuxRelease: pFilp=%p pSession=%p pid=%d/%d %s\n",
|
---|
565 | pFilp, pFilp->private_data, RTProcSelf(), current->pid, current->comm));
|
---|
566 |
|
---|
567 | VBoxGuestCloseSession(&g_DevExt, (PVBOXGUESTSESSION)pFilp->private_data);
|
---|
568 | pFilp->private_data = NULL;
|
---|
569 | return 0;
|
---|
570 | }
|
---|
571 |
|
---|
572 |
|
---|
573 | /**
|
---|
574 | * Device I/O Control entry point.
|
---|
575 | *
|
---|
576 | * @param pFilp Associated file pointer.
|
---|
577 | * @param uCmd The function specified to ioctl().
|
---|
578 | * @param ulArg The argument specified to ioctl().
|
---|
579 | */
|
---|
580 | #ifdef HAVE_UNLOCKED_IOCTL
|
---|
581 | static long vboxguestLinuxIOCtl(struct file *pFilp, unsigned int uCmd, unsigned long ulArg)
|
---|
582 | #else
|
---|
583 | static int vboxguestLinuxIOCtl(struct inode *pInode, struct file *pFilp, unsigned int uCmd, unsigned long ulArg)
|
---|
584 | #endif
|
---|
585 | {
|
---|
586 | PVBOXGUESTSESSION pSession = (PVBOXGUESTSESSION)pFilp->private_data;
|
---|
587 | uint32_t cbData = _IOC_SIZE(uCmd);
|
---|
588 | void *pvBufFree;
|
---|
589 | void *pvBuf;
|
---|
590 | int rc;
|
---|
591 | uint64_t au64Buf[32/sizeof(uint64_t)];
|
---|
592 |
|
---|
593 | Log6(("vboxguestLinuxIOCtl: pFilp=%p uCmd=%#x ulArg=%p pid=%d/%d\n", pFilp, uCmd, (void *)ulArg, RTProcSelf(), current->pid));
|
---|
594 |
|
---|
595 | /*
|
---|
596 | * Buffer the request.
|
---|
597 | */
|
---|
598 | if (cbData <= sizeof(au64Buf))
|
---|
599 | {
|
---|
600 | pvBufFree = NULL;
|
---|
601 | pvBuf = &au64Buf[0];
|
---|
602 | }
|
---|
603 | else
|
---|
604 | {
|
---|
605 | pvBufFree = pvBuf = RTMemTmpAlloc(cbData);
|
---|
606 | if (RT_UNLIKELY(!pvBuf))
|
---|
607 | {
|
---|
608 | LogRel((DEVICE_NAME "::IOCtl: RTMemTmpAlloc failed to alloc %u bytes.\n", cbData));
|
---|
609 | return -ENOMEM;
|
---|
610 | }
|
---|
611 | }
|
---|
612 | if (RT_LIKELY(copy_from_user(pvBuf, (void *)ulArg, cbData)))
|
---|
613 | {
|
---|
614 | /*
|
---|
615 | * Process the IOCtl.
|
---|
616 | */
|
---|
617 | size_t cbDataReturned;
|
---|
618 | rc = VBoxGuestCommonIOCtl(uCmd, &g_DevExt, pSession, pvBuf, cbData, &cbDataReturned);
|
---|
619 |
|
---|
620 | /*
|
---|
621 | * Copy ioctl data and output buffer back to user space.
|
---|
622 | */
|
---|
623 | if (RT_LIKELY(!rc))
|
---|
624 | {
|
---|
625 | rc = 0;
|
---|
626 | if (RT_UNLIKELY(cbDataReturned > cbData))
|
---|
627 | {
|
---|
628 | LogRel((DEVICE_NAME "::IOCtl: too much output data %u expected %u\n", cbDataReturned, cbData));
|
---|
629 | cbDataReturned = cbData;
|
---|
630 | }
|
---|
631 | if (cbDataReturned > 0)
|
---|
632 | {
|
---|
633 | if (RT_UNLIKELY(copy_to_user((void *)ulArg, pvBuf, cbDataReturned)))
|
---|
634 | {
|
---|
635 | LogRel((DEVICE_NAME "::IOCtl: copy_to_user failed; pvBuf=%p ulArg=%p cbDataReturned=%u uCmd=%d\n",
|
---|
636 | pvBuf, (void *)ulArg, cbDataReturned, uCmd, rc));
|
---|
637 | rc = -EFAULT;
|
---|
638 | }
|
---|
639 | }
|
---|
640 | }
|
---|
641 | else
|
---|
642 | {
|
---|
643 | Log(("vboxguestLinuxIOCtl: pFilp=%p uCmd=%#x ulArg=%p failed, rc=%d\n", pFilp, uCmd, (void *)ulArg, rc));
|
---|
644 | rc = vboxguestLinuxConvertToNegErrno(rc);
|
---|
645 | }
|
---|
646 | }
|
---|
647 | else
|
---|
648 | {
|
---|
649 | Log((DEVICE_NAME "::IOCtl: copy_from_user(,%#lx, %#x) failed; uCmd=%#x.\n", ulArg, cbData, uCmd));
|
---|
650 | rc = -EFAULT;
|
---|
651 | }
|
---|
652 | if (pvBufFree)
|
---|
653 | RTMemFree(pvBufFree);
|
---|
654 |
|
---|
655 | Log6(("vboxguestLinuxIOCtl: returns %d (pid=%d/%d)\n", rc, RTProcSelf(), current->pid));
|
---|
656 | return rc;
|
---|
657 | }
|
---|
658 |
|
---|
659 | /* Common code that depend on g_DevExt. */
|
---|
660 | #include "VBoxGuestIDC-unix.c.h"
|
---|
661 |
|
---|
662 | EXPORT_SYMBOL(VBoxGuestIDCOpen);
|
---|
663 | EXPORT_SYMBOL(VBoxGuestIDCClose);
|
---|
664 | EXPORT_SYMBOL(VBoxGuestIDCCall);
|
---|
665 |
|
---|
666 | module_init(vboxguestLinuxModInit);
|
---|
667 | module_exit(vboxguestLinuxModExit);
|
---|
668 |
|
---|
669 | MODULE_AUTHOR("Sun Microsystems, Inc.");
|
---|
670 | MODULE_DESCRIPTION("VirtualBox Guest Additions for Linux Module");
|
---|
671 | MODULE_LICENSE("GPL");
|
---|
672 | #ifdef MODULE_VERSION
|
---|
673 | MODULE_VERSION(VBOX_VERSION_STRING " (" xstr(SUPDRV_IOC_VERSION) ")");
|
---|
674 | #endif
|
---|
675 |
|
---|