1 | #include <machine/rtems-bsd-kernel-space.h> |
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2 | |
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3 | /* $FreeBSD$ */ |
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4 | /*- |
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5 | * Copyright (c) 2006-2008 Hans Petter Selasky. All rights reserved. |
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6 | * |
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7 | * Redistribution and use in source and binary forms, with or without |
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8 | * modification, are permitted provided that the following conditions |
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9 | * are met: |
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10 | * 1. Redistributions of source code must retain the above copyright |
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11 | * notice, this list of conditions and the following disclaimer. |
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12 | * 2. Redistributions in binary form must reproduce the above copyright |
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13 | * notice, this list of conditions and the following disclaimer in the |
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14 | * documentation and/or other materials provided with the distribution. |
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15 | * |
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16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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17 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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20 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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21 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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22 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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23 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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24 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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25 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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26 | * SUCH DAMAGE. |
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27 | * |
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28 | * |
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29 | * usb_dev.c - An abstraction layer for creating devices under /dev/... |
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30 | */ |
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31 | |
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32 | #ifdef USB_GLOBAL_INCLUDE_FILE |
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33 | #include USB_GLOBAL_INCLUDE_FILE |
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34 | #else |
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35 | #include <sys/stdint.h> |
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36 | #include <sys/stddef.h> |
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37 | #include <rtems/bsd/sys/param.h> |
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38 | #include <sys/queue.h> |
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39 | #include <sys/types.h> |
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40 | #include <sys/systm.h> |
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41 | #include <sys/kernel.h> |
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42 | #include <sys/bus.h> |
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43 | #include <sys/module.h> |
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44 | #include <rtems/bsd/sys/lock.h> |
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45 | #include <sys/mutex.h> |
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46 | #include <sys/condvar.h> |
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47 | #include <sys/sysctl.h> |
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48 | #include <sys/sx.h> |
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49 | #include <rtems/bsd/sys/unistd.h> |
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50 | #include <sys/callout.h> |
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51 | #include <sys/malloc.h> |
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52 | #include <sys/priv.h> |
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53 | #include <sys/vnode.h> |
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54 | #include <sys/conf.h> |
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55 | #include <sys/fcntl.h> |
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56 | |
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57 | #include <dev/usb/usb.h> |
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58 | #include <dev/usb/usb_ioctl.h> |
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59 | #include <dev/usb/usbdi.h> |
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60 | #include <dev/usb/usbdi_util.h> |
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61 | |
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62 | #define USB_DEBUG_VAR usb_fifo_debug |
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63 | |
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64 | #include <dev/usb/usb_core.h> |
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65 | #include <dev/usb/usb_dev.h> |
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66 | #include <dev/usb/usb_mbuf.h> |
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67 | #include <dev/usb/usb_process.h> |
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68 | #include <dev/usb/usb_device.h> |
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69 | #include <dev/usb/usb_debug.h> |
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70 | #include <dev/usb/usb_busdma.h> |
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71 | #include <dev/usb/usb_generic.h> |
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72 | #include <dev/usb/usb_dynamic.h> |
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73 | #include <dev/usb/usb_util.h> |
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74 | |
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75 | #include <dev/usb/usb_controller.h> |
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76 | #include <dev/usb/usb_bus.h> |
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77 | |
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78 | #include <sys/filio.h> |
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79 | #include <sys/ttycom.h> |
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80 | #include <sys/syscallsubr.h> |
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81 | |
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82 | #include <machine/stdarg.h> |
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83 | #endif /* USB_GLOBAL_INCLUDE_FILE */ |
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84 | |
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85 | #if USB_HAVE_UGEN |
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86 | |
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87 | #ifdef USB_DEBUG |
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88 | static int usb_fifo_debug = 0; |
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89 | |
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90 | static SYSCTL_NODE(_hw_usb, OID_AUTO, dev, CTLFLAG_RW, 0, "USB device"); |
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91 | SYSCTL_INT(_hw_usb_dev, OID_AUTO, debug, CTLFLAG_RWTUN, |
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92 | &usb_fifo_debug, 0, "Debug Level"); |
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93 | #endif |
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94 | |
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95 | #if ((__FreeBSD_version >= 700001) || (__FreeBSD_version == 0) || \ |
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96 | ((__FreeBSD_version >= 600034) && (__FreeBSD_version < 700000))) |
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97 | #define USB_UCRED struct ucred *ucred, |
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98 | #else |
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99 | #define USB_UCRED |
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100 | #endif |
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101 | |
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102 | /* prototypes */ |
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103 | |
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104 | static int usb_fifo_open(struct usb_cdev_privdata *, |
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105 | struct usb_fifo *, int); |
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106 | static void usb_fifo_close(struct usb_fifo *, int); |
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107 | static void usb_dev_init(void *); |
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108 | static void usb_dev_init_post(void *); |
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109 | static void usb_dev_uninit(void *); |
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110 | static int usb_fifo_uiomove(struct usb_fifo *, void *, int, |
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111 | struct uio *); |
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112 | static void usb_fifo_check_methods(struct usb_fifo_methods *); |
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113 | static struct usb_fifo *usb_fifo_alloc(struct mtx *); |
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114 | static struct usb_endpoint *usb_dev_get_ep(struct usb_device *, uint8_t, |
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115 | uint8_t); |
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116 | static void usb_loc_fill(struct usb_fs_privdata *, |
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117 | struct usb_cdev_privdata *); |
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118 | static void usb_close(void *); |
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119 | static usb_error_t usb_ref_device(struct usb_cdev_privdata *, struct usb_cdev_refdata *, int); |
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120 | static usb_error_t usb_usb_ref_device(struct usb_cdev_privdata *, struct usb_cdev_refdata *); |
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121 | static void usb_unref_device(struct usb_cdev_privdata *, struct usb_cdev_refdata *); |
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122 | |
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123 | static d_open_t usb_open; |
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124 | static d_ioctl_t usb_ioctl; |
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125 | static d_read_t usb_read; |
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126 | static d_write_t usb_write; |
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127 | static d_poll_t usb_poll; |
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128 | static d_kqfilter_t usb_kqfilter; |
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129 | |
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130 | static d_ioctl_t usb_static_ioctl; |
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131 | |
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132 | static usb_fifo_open_t usb_fifo_dummy_open; |
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133 | static usb_fifo_close_t usb_fifo_dummy_close; |
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134 | static usb_fifo_ioctl_t usb_fifo_dummy_ioctl; |
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135 | static usb_fifo_cmd_t usb_fifo_dummy_cmd; |
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136 | |
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137 | /* character device structure used for devices (/dev/ugenX.Y and /dev/uXXX) */ |
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138 | struct cdevsw usb_devsw = { |
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139 | .d_version = D_VERSION, |
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140 | .d_open = usb_open, |
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141 | .d_ioctl = usb_ioctl, |
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142 | .d_name = "usbdev", |
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143 | .d_flags = D_TRACKCLOSE, |
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144 | .d_read = usb_read, |
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145 | .d_write = usb_write, |
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146 | .d_poll = usb_poll, |
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147 | .d_kqfilter = usb_kqfilter, |
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148 | }; |
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149 | |
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150 | static struct cdev* usb_dev = NULL; |
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151 | |
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152 | /* character device structure used for /dev/usb */ |
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153 | static struct cdevsw usb_static_devsw = { |
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154 | .d_version = D_VERSION, |
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155 | .d_ioctl = usb_static_ioctl, |
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156 | .d_name = "usb" |
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157 | }; |
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158 | |
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159 | static TAILQ_HEAD(, usb_symlink) usb_sym_head; |
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160 | static struct sx usb_sym_lock; |
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161 | |
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162 | struct mtx usb_ref_lock; |
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163 | |
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164 | /*------------------------------------------------------------------------* |
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165 | * usb_loc_fill |
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166 | * |
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167 | * This is used to fill out a usb_cdev_privdata structure based on the |
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168 | * device's address as contained in usb_fs_privdata. |
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169 | *------------------------------------------------------------------------*/ |
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170 | static void |
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171 | usb_loc_fill(struct usb_fs_privdata* pd, struct usb_cdev_privdata *cpd) |
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172 | { |
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173 | cpd->bus_index = pd->bus_index; |
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174 | cpd->dev_index = pd->dev_index; |
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175 | cpd->ep_addr = pd->ep_addr; |
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176 | cpd->fifo_index = pd->fifo_index; |
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177 | } |
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178 | |
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179 | /*------------------------------------------------------------------------* |
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180 | * usb_ref_device |
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181 | * |
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182 | * This function is used to atomically refer an USB device by its |
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183 | * device location. If this function returns success the USB device |
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184 | * will not disappear until the USB device is unreferenced. |
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185 | * |
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186 | * Return values: |
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187 | * 0: Success, refcount incremented on the given USB device. |
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188 | * Else: Failure. |
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189 | *------------------------------------------------------------------------*/ |
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190 | static usb_error_t |
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191 | usb_ref_device(struct usb_cdev_privdata *cpd, |
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192 | struct usb_cdev_refdata *crd, int need_uref) |
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193 | { |
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194 | struct usb_fifo **ppf; |
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195 | struct usb_fifo *f; |
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196 | |
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197 | DPRINTFN(2, "cpd=%p need uref=%d\n", cpd, need_uref); |
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198 | |
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199 | /* clear all refs */ |
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200 | memset(crd, 0, sizeof(*crd)); |
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201 | |
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202 | mtx_lock(&usb_ref_lock); |
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203 | cpd->bus = devclass_get_softc(usb_devclass_ptr, cpd->bus_index); |
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204 | if (cpd->bus == NULL) { |
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205 | DPRINTFN(2, "no bus at %u\n", cpd->bus_index); |
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206 | goto error; |
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207 | } |
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208 | cpd->udev = cpd->bus->devices[cpd->dev_index]; |
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209 | if (cpd->udev == NULL) { |
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210 | DPRINTFN(2, "no device at %u\n", cpd->dev_index); |
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211 | goto error; |
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212 | } |
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213 | if (cpd->udev->state == USB_STATE_DETACHED && |
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214 | (need_uref != 2)) { |
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215 | DPRINTFN(2, "device is detached\n"); |
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216 | goto error; |
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217 | } |
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218 | if (need_uref) { |
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219 | DPRINTFN(2, "ref udev - needed\n"); |
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220 | |
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221 | if (cpd->udev->refcount == USB_DEV_REF_MAX) { |
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222 | DPRINTFN(2, "no dev ref\n"); |
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223 | goto error; |
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224 | } |
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225 | cpd->udev->refcount++; |
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226 | |
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227 | mtx_unlock(&usb_ref_lock); |
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228 | |
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229 | /* |
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230 | * We need to grab the enumeration SX-lock before |
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231 | * grabbing the FIFO refs to avoid deadlock at detach! |
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232 | */ |
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233 | crd->do_unlock = usbd_enum_lock_sig(cpd->udev); |
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234 | |
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235 | mtx_lock(&usb_ref_lock); |
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236 | |
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237 | /* |
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238 | * Set "is_uref" after grabbing the default SX lock |
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239 | */ |
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240 | crd->is_uref = 1; |
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241 | |
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242 | /* check for signal */ |
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243 | if (crd->do_unlock > 1) { |
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244 | crd->do_unlock = 0; |
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245 | goto error; |
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246 | } |
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247 | } |
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248 | |
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249 | /* check if we are doing an open */ |
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250 | if (cpd->fflags == 0) { |
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251 | /* use zero defaults */ |
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252 | } else { |
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253 | /* check for write */ |
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254 | if (cpd->fflags & FWRITE) { |
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255 | ppf = cpd->udev->fifo; |
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256 | f = ppf[cpd->fifo_index + USB_FIFO_TX]; |
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257 | crd->txfifo = f; |
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258 | crd->is_write = 1; /* ref */ |
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259 | if (f == NULL || f->refcount == USB_FIFO_REF_MAX) |
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260 | goto error; |
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261 | if (f->curr_cpd != cpd) |
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262 | goto error; |
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263 | /* check if USB-FS is active */ |
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264 | if (f->fs_ep_max != 0) { |
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265 | crd->is_usbfs = 1; |
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266 | } |
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267 | } |
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268 | |
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269 | /* check for read */ |
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270 | if (cpd->fflags & FREAD) { |
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271 | ppf = cpd->udev->fifo; |
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272 | f = ppf[cpd->fifo_index + USB_FIFO_RX]; |
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273 | crd->rxfifo = f; |
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274 | crd->is_read = 1; /* ref */ |
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275 | if (f == NULL || f->refcount == USB_FIFO_REF_MAX) |
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276 | goto error; |
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277 | if (f->curr_cpd != cpd) |
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278 | goto error; |
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279 | /* check if USB-FS is active */ |
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280 | if (f->fs_ep_max != 0) { |
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281 | crd->is_usbfs = 1; |
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282 | } |
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283 | } |
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284 | } |
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285 | |
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286 | /* when everything is OK we increment the refcounts */ |
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287 | if (crd->is_write) { |
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288 | DPRINTFN(2, "ref write\n"); |
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289 | crd->txfifo->refcount++; |
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290 | } |
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291 | if (crd->is_read) { |
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292 | DPRINTFN(2, "ref read\n"); |
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293 | crd->rxfifo->refcount++; |
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294 | } |
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295 | mtx_unlock(&usb_ref_lock); |
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296 | |
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297 | return (0); |
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298 | |
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299 | error: |
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300 | if (crd->do_unlock) |
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301 | usbd_enum_unlock(cpd->udev); |
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302 | |
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303 | if (crd->is_uref) { |
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304 | if (--(cpd->udev->refcount) == 0) |
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305 | cv_broadcast(&cpd->udev->ref_cv); |
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306 | } |
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307 | mtx_unlock(&usb_ref_lock); |
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308 | DPRINTFN(2, "fail\n"); |
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309 | |
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310 | /* clear all refs */ |
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311 | memset(crd, 0, sizeof(*crd)); |
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312 | |
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313 | return (USB_ERR_INVAL); |
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314 | } |
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315 | |
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316 | /*------------------------------------------------------------------------* |
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317 | * usb_usb_ref_device |
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318 | * |
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319 | * This function is used to upgrade an USB reference to include the |
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320 | * USB device reference on a USB location. |
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321 | * |
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322 | * Return values: |
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323 | * 0: Success, refcount incremented on the given USB device. |
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324 | * Else: Failure. |
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325 | *------------------------------------------------------------------------*/ |
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326 | static usb_error_t |
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327 | usb_usb_ref_device(struct usb_cdev_privdata *cpd, |
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328 | struct usb_cdev_refdata *crd) |
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329 | { |
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330 | /* |
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331 | * Check if we already got an USB reference on this location: |
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332 | */ |
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333 | if (crd->is_uref) |
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334 | return (0); /* success */ |
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335 | |
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336 | /* |
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337 | * To avoid deadlock at detach we need to drop the FIFO ref |
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338 | * and re-acquire a new ref! |
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339 | */ |
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340 | usb_unref_device(cpd, crd); |
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341 | |
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342 | return (usb_ref_device(cpd, crd, 1 /* need uref */)); |
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343 | } |
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344 | |
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345 | /*------------------------------------------------------------------------* |
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346 | * usb_unref_device |
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347 | * |
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348 | * This function will release the reference count by one unit for the |
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349 | * given USB device. |
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350 | *------------------------------------------------------------------------*/ |
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351 | static void |
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352 | usb_unref_device(struct usb_cdev_privdata *cpd, |
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353 | struct usb_cdev_refdata *crd) |
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354 | { |
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355 | |
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356 | DPRINTFN(2, "cpd=%p is_uref=%d\n", cpd, crd->is_uref); |
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357 | |
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358 | if (crd->do_unlock) |
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359 | usbd_enum_unlock(cpd->udev); |
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360 | |
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361 | mtx_lock(&usb_ref_lock); |
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362 | if (crd->is_read) { |
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363 | if (--(crd->rxfifo->refcount) == 0) { |
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364 | cv_signal(&crd->rxfifo->cv_drain); |
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365 | } |
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366 | crd->is_read = 0; |
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367 | } |
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368 | if (crd->is_write) { |
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369 | if (--(crd->txfifo->refcount) == 0) { |
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370 | cv_signal(&crd->txfifo->cv_drain); |
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371 | } |
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372 | crd->is_write = 0; |
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373 | } |
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374 | if (crd->is_uref) { |
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375 | crd->is_uref = 0; |
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376 | if (--(cpd->udev->refcount) == 0) |
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377 | cv_broadcast(&cpd->udev->ref_cv); |
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378 | } |
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379 | mtx_unlock(&usb_ref_lock); |
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380 | } |
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381 | |
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382 | static struct usb_fifo * |
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383 | usb_fifo_alloc(struct mtx *mtx) |
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384 | { |
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385 | struct usb_fifo *f; |
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386 | |
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387 | f = malloc(sizeof(*f), M_USBDEV, M_WAITOK | M_ZERO); |
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388 | if (f != NULL) { |
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389 | cv_init(&f->cv_io, "FIFO-IO"); |
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390 | cv_init(&f->cv_drain, "FIFO-DRAIN"); |
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391 | f->priv_mtx = mtx; |
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392 | f->refcount = 1; |
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393 | knlist_init_mtx(&f->selinfo.si_note, mtx); |
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394 | } |
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395 | return (f); |
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396 | } |
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397 | |
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398 | /*------------------------------------------------------------------------* |
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399 | * usb_fifo_create |
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400 | *------------------------------------------------------------------------*/ |
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401 | static int |
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402 | usb_fifo_create(struct usb_cdev_privdata *cpd, |
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403 | struct usb_cdev_refdata *crd) |
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404 | { |
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405 | struct usb_device *udev = cpd->udev; |
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406 | struct usb_fifo *f; |
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407 | struct usb_endpoint *ep; |
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408 | uint8_t n; |
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409 | uint8_t is_tx; |
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410 | uint8_t is_rx; |
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411 | uint8_t no_null; |
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412 | uint8_t is_busy; |
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413 | int e = cpd->ep_addr; |
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414 | |
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415 | is_tx = (cpd->fflags & FWRITE) ? 1 : 0; |
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416 | is_rx = (cpd->fflags & FREAD) ? 1 : 0; |
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417 | no_null = 1; |
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418 | is_busy = 0; |
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419 | |
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420 | /* Preallocated FIFO */ |
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421 | if (e < 0) { |
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422 | DPRINTFN(5, "Preallocated FIFO\n"); |
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423 | if (is_tx) { |
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424 | f = udev->fifo[cpd->fifo_index + USB_FIFO_TX]; |
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425 | if (f == NULL) |
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426 | return (EINVAL); |
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427 | crd->txfifo = f; |
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428 | } |
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429 | if (is_rx) { |
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430 | f = udev->fifo[cpd->fifo_index + USB_FIFO_RX]; |
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431 | if (f == NULL) |
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432 | return (EINVAL); |
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433 | crd->rxfifo = f; |
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434 | } |
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435 | return (0); |
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436 | } |
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437 | |
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438 | KASSERT(e >= 0 && e <= 15, ("endpoint %d out of range", e)); |
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439 | |
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440 | /* search for a free FIFO slot */ |
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441 | DPRINTFN(5, "Endpoint device, searching for 0x%02x\n", e); |
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442 | for (n = 0;; n += 2) { |
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443 | |
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444 | if (n == USB_FIFO_MAX) { |
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445 | if (no_null) { |
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446 | no_null = 0; |
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447 | n = 0; |
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448 | } else { |
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449 | /* end of FIFOs reached */ |
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450 | DPRINTFN(5, "out of FIFOs\n"); |
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451 | return (ENOMEM); |
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452 | } |
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453 | } |
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454 | /* Check for TX FIFO */ |
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455 | if (is_tx) { |
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456 | f = udev->fifo[n + USB_FIFO_TX]; |
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457 | if (f != NULL) { |
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458 | if (f->dev_ep_index != e) { |
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459 | /* wrong endpoint index */ |
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460 | continue; |
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461 | } |
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462 | if (f->curr_cpd != NULL) { |
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463 | /* FIFO is opened */ |
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464 | is_busy = 1; |
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465 | continue; |
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466 | } |
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467 | } else if (no_null) { |
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468 | continue; |
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469 | } |
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470 | } |
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471 | /* Check for RX FIFO */ |
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472 | if (is_rx) { |
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473 | f = udev->fifo[n + USB_FIFO_RX]; |
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474 | if (f != NULL) { |
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475 | if (f->dev_ep_index != e) { |
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476 | /* wrong endpoint index */ |
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477 | continue; |
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478 | } |
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479 | if (f->curr_cpd != NULL) { |
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480 | /* FIFO is opened */ |
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481 | is_busy = 1; |
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482 | continue; |
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483 | } |
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484 | } else if (no_null) { |
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485 | continue; |
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486 | } |
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487 | } |
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488 | break; |
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489 | } |
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490 | |
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491 | if (no_null == 0) { |
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492 | if (e >= (USB_EP_MAX / 2)) { |
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493 | /* we don't create any endpoints in this range */ |
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494 | DPRINTFN(5, "ep out of range\n"); |
---|
495 | return (is_busy ? EBUSY : EINVAL); |
---|
496 | } |
---|
497 | } |
---|
498 | |
---|
499 | if ((e != 0) && is_busy) { |
---|
500 | /* |
---|
501 | * Only the default control endpoint is allowed to be |
---|
502 | * opened multiple times! |
---|
503 | */ |
---|
504 | DPRINTFN(5, "busy\n"); |
---|
505 | return (EBUSY); |
---|
506 | } |
---|
507 | |
---|
508 | /* Check TX FIFO */ |
---|
509 | if (is_tx && |
---|
510 | (udev->fifo[n + USB_FIFO_TX] == NULL)) { |
---|
511 | ep = usb_dev_get_ep(udev, e, USB_FIFO_TX); |
---|
512 | DPRINTFN(5, "dev_get_endpoint(%d, 0x%x)\n", e, USB_FIFO_TX); |
---|
513 | if (ep == NULL) { |
---|
514 | DPRINTFN(5, "dev_get_endpoint returned NULL\n"); |
---|
515 | return (EINVAL); |
---|
516 | } |
---|
517 | f = usb_fifo_alloc(&udev->device_mtx); |
---|
518 | if (f == NULL) { |
---|
519 | DPRINTFN(5, "could not alloc tx fifo\n"); |
---|
520 | return (ENOMEM); |
---|
521 | } |
---|
522 | /* update some fields */ |
---|
523 | f->fifo_index = n + USB_FIFO_TX; |
---|
524 | f->dev_ep_index = e; |
---|
525 | f->priv_sc0 = ep; |
---|
526 | f->methods = &usb_ugen_methods; |
---|
527 | f->iface_index = ep->iface_index; |
---|
528 | f->udev = udev; |
---|
529 | mtx_lock(&usb_ref_lock); |
---|
530 | udev->fifo[n + USB_FIFO_TX] = f; |
---|
531 | mtx_unlock(&usb_ref_lock); |
---|
532 | } |
---|
533 | /* Check RX FIFO */ |
---|
534 | if (is_rx && |
---|
535 | (udev->fifo[n + USB_FIFO_RX] == NULL)) { |
---|
536 | |
---|
537 | ep = usb_dev_get_ep(udev, e, USB_FIFO_RX); |
---|
538 | DPRINTFN(5, "dev_get_endpoint(%d, 0x%x)\n", e, USB_FIFO_RX); |
---|
539 | if (ep == NULL) { |
---|
540 | DPRINTFN(5, "dev_get_endpoint returned NULL\n"); |
---|
541 | return (EINVAL); |
---|
542 | } |
---|
543 | f = usb_fifo_alloc(&udev->device_mtx); |
---|
544 | if (f == NULL) { |
---|
545 | DPRINTFN(5, "could not alloc rx fifo\n"); |
---|
546 | return (ENOMEM); |
---|
547 | } |
---|
548 | /* update some fields */ |
---|
549 | f->fifo_index = n + USB_FIFO_RX; |
---|
550 | f->dev_ep_index = e; |
---|
551 | f->priv_sc0 = ep; |
---|
552 | f->methods = &usb_ugen_methods; |
---|
553 | f->iface_index = ep->iface_index; |
---|
554 | f->udev = udev; |
---|
555 | mtx_lock(&usb_ref_lock); |
---|
556 | udev->fifo[n + USB_FIFO_RX] = f; |
---|
557 | mtx_unlock(&usb_ref_lock); |
---|
558 | } |
---|
559 | if (is_tx) { |
---|
560 | crd->txfifo = udev->fifo[n + USB_FIFO_TX]; |
---|
561 | } |
---|
562 | if (is_rx) { |
---|
563 | crd->rxfifo = udev->fifo[n + USB_FIFO_RX]; |
---|
564 | } |
---|
565 | /* fill out fifo index */ |
---|
566 | DPRINTFN(5, "fifo index = %d\n", n); |
---|
567 | cpd->fifo_index = n; |
---|
568 | |
---|
569 | /* complete */ |
---|
570 | |
---|
571 | return (0); |
---|
572 | } |
---|
573 | |
---|
574 | void |
---|
575 | usb_fifo_free(struct usb_fifo *f) |
---|
576 | { |
---|
577 | uint8_t n; |
---|
578 | |
---|
579 | if (f == NULL) { |
---|
580 | /* be NULL safe */ |
---|
581 | return; |
---|
582 | } |
---|
583 | /* destroy symlink devices, if any */ |
---|
584 | for (n = 0; n != 2; n++) { |
---|
585 | if (f->symlink[n]) { |
---|
586 | usb_free_symlink(f->symlink[n]); |
---|
587 | f->symlink[n] = NULL; |
---|
588 | } |
---|
589 | } |
---|
590 | mtx_lock(&usb_ref_lock); |
---|
591 | |
---|
592 | /* delink ourselves to stop calls from userland */ |
---|
593 | if ((f->fifo_index < USB_FIFO_MAX) && |
---|
594 | (f->udev != NULL) && |
---|
595 | (f->udev->fifo[f->fifo_index] == f)) { |
---|
596 | f->udev->fifo[f->fifo_index] = NULL; |
---|
597 | } else { |
---|
598 | DPRINTFN(0, "USB FIFO %p has not been linked\n", f); |
---|
599 | } |
---|
600 | |
---|
601 | /* decrease refcount */ |
---|
602 | f->refcount--; |
---|
603 | /* need to wait until all callers have exited */ |
---|
604 | while (f->refcount != 0) { |
---|
605 | mtx_unlock(&usb_ref_lock); /* avoid LOR */ |
---|
606 | mtx_lock(f->priv_mtx); |
---|
607 | /* prevent write flush, if any */ |
---|
608 | f->flag_iserror = 1; |
---|
609 | /* get I/O thread out of any sleep state */ |
---|
610 | if (f->flag_sleeping) { |
---|
611 | f->flag_sleeping = 0; |
---|
612 | cv_broadcast(&f->cv_io); |
---|
613 | } |
---|
614 | mtx_unlock(f->priv_mtx); |
---|
615 | mtx_lock(&usb_ref_lock); |
---|
616 | |
---|
617 | /* |
---|
618 | * Check if the "f->refcount" variable reached zero |
---|
619 | * during the unlocked time before entering wait: |
---|
620 | */ |
---|
621 | if (f->refcount == 0) |
---|
622 | break; |
---|
623 | |
---|
624 | /* wait for sync */ |
---|
625 | cv_wait(&f->cv_drain, &usb_ref_lock); |
---|
626 | } |
---|
627 | mtx_unlock(&usb_ref_lock); |
---|
628 | |
---|
629 | /* take care of closing the device here, if any */ |
---|
630 | usb_fifo_close(f, 0); |
---|
631 | |
---|
632 | cv_destroy(&f->cv_io); |
---|
633 | cv_destroy(&f->cv_drain); |
---|
634 | |
---|
635 | knlist_clear(&f->selinfo.si_note, 0); |
---|
636 | seldrain(&f->selinfo); |
---|
637 | knlist_destroy(&f->selinfo.si_note); |
---|
638 | |
---|
639 | free(f, M_USBDEV); |
---|
640 | } |
---|
641 | |
---|
642 | static struct usb_endpoint * |
---|
643 | usb_dev_get_ep(struct usb_device *udev, uint8_t ep_index, uint8_t dir) |
---|
644 | { |
---|
645 | struct usb_endpoint *ep; |
---|
646 | uint8_t ep_dir; |
---|
647 | |
---|
648 | if (ep_index == 0) { |
---|
649 | ep = &udev->ctrl_ep; |
---|
650 | } else { |
---|
651 | if (dir == USB_FIFO_RX) { |
---|
652 | if (udev->flags.usb_mode == USB_MODE_HOST) { |
---|
653 | ep_dir = UE_DIR_IN; |
---|
654 | } else { |
---|
655 | ep_dir = UE_DIR_OUT; |
---|
656 | } |
---|
657 | } else { |
---|
658 | if (udev->flags.usb_mode == USB_MODE_HOST) { |
---|
659 | ep_dir = UE_DIR_OUT; |
---|
660 | } else { |
---|
661 | ep_dir = UE_DIR_IN; |
---|
662 | } |
---|
663 | } |
---|
664 | ep = usbd_get_ep_by_addr(udev, ep_index | ep_dir); |
---|
665 | } |
---|
666 | |
---|
667 | if (ep == NULL) { |
---|
668 | /* if the endpoint does not exist then return */ |
---|
669 | return (NULL); |
---|
670 | } |
---|
671 | if (ep->edesc == NULL) { |
---|
672 | /* invalid endpoint */ |
---|
673 | return (NULL); |
---|
674 | } |
---|
675 | return (ep); /* success */ |
---|
676 | } |
---|
677 | |
---|
678 | /*------------------------------------------------------------------------* |
---|
679 | * usb_fifo_open |
---|
680 | * |
---|
681 | * Returns: |
---|
682 | * 0: Success |
---|
683 | * Else: Failure |
---|
684 | *------------------------------------------------------------------------*/ |
---|
685 | static int |
---|
686 | usb_fifo_open(struct usb_cdev_privdata *cpd, |
---|
687 | struct usb_fifo *f, int fflags) |
---|
688 | { |
---|
689 | int err; |
---|
690 | |
---|
691 | if (f == NULL) { |
---|
692 | /* no FIFO there */ |
---|
693 | DPRINTFN(2, "no FIFO\n"); |
---|
694 | return (ENXIO); |
---|
695 | } |
---|
696 | /* remove FWRITE and FREAD flags */ |
---|
697 | fflags &= ~(FWRITE | FREAD); |
---|
698 | |
---|
699 | /* set correct file flags */ |
---|
700 | if ((f->fifo_index & 1) == USB_FIFO_TX) { |
---|
701 | fflags |= FWRITE; |
---|
702 | } else { |
---|
703 | fflags |= FREAD; |
---|
704 | } |
---|
705 | |
---|
706 | /* check if we are already opened */ |
---|
707 | /* we don't need any locks when checking this variable */ |
---|
708 | if (f->curr_cpd != NULL) { |
---|
709 | err = EBUSY; |
---|
710 | goto done; |
---|
711 | } |
---|
712 | |
---|
713 | /* reset short flag before open */ |
---|
714 | f->flag_short = 0; |
---|
715 | |
---|
716 | /* call open method */ |
---|
717 | err = (f->methods->f_open) (f, fflags); |
---|
718 | if (err) { |
---|
719 | goto done; |
---|
720 | } |
---|
721 | mtx_lock(f->priv_mtx); |
---|
722 | |
---|
723 | /* reset sleep flag */ |
---|
724 | f->flag_sleeping = 0; |
---|
725 | |
---|
726 | /* reset error flag */ |
---|
727 | f->flag_iserror = 0; |
---|
728 | |
---|
729 | /* reset complete flag */ |
---|
730 | f->flag_iscomplete = 0; |
---|
731 | |
---|
732 | /* reset select flag */ |
---|
733 | f->flag_isselect = 0; |
---|
734 | |
---|
735 | /* reset flushing flag */ |
---|
736 | f->flag_flushing = 0; |
---|
737 | |
---|
738 | /* reset ASYNC proc flag */ |
---|
739 | f->async_p = NULL; |
---|
740 | |
---|
741 | mtx_lock(&usb_ref_lock); |
---|
742 | /* flag the fifo as opened to prevent others */ |
---|
743 | f->curr_cpd = cpd; |
---|
744 | mtx_unlock(&usb_ref_lock); |
---|
745 | |
---|
746 | /* reset queue */ |
---|
747 | usb_fifo_reset(f); |
---|
748 | |
---|
749 | mtx_unlock(f->priv_mtx); |
---|
750 | done: |
---|
751 | return (err); |
---|
752 | } |
---|
753 | |
---|
754 | /*------------------------------------------------------------------------* |
---|
755 | * usb_fifo_reset |
---|
756 | *------------------------------------------------------------------------*/ |
---|
757 | void |
---|
758 | usb_fifo_reset(struct usb_fifo *f) |
---|
759 | { |
---|
760 | struct usb_mbuf *m; |
---|
761 | |
---|
762 | if (f == NULL) { |
---|
763 | return; |
---|
764 | } |
---|
765 | while (1) { |
---|
766 | USB_IF_DEQUEUE(&f->used_q, m); |
---|
767 | if (m) { |
---|
768 | USB_IF_ENQUEUE(&f->free_q, m); |
---|
769 | } else { |
---|
770 | break; |
---|
771 | } |
---|
772 | } |
---|
773 | /* reset have fragment flag */ |
---|
774 | f->flag_have_fragment = 0; |
---|
775 | } |
---|
776 | |
---|
777 | /*------------------------------------------------------------------------* |
---|
778 | * usb_fifo_close |
---|
779 | *------------------------------------------------------------------------*/ |
---|
780 | static void |
---|
781 | usb_fifo_close(struct usb_fifo *f, int fflags) |
---|
782 | { |
---|
783 | int err; |
---|
784 | |
---|
785 | /* check if we are not opened */ |
---|
786 | if (f->curr_cpd == NULL) { |
---|
787 | /* nothing to do - already closed */ |
---|
788 | return; |
---|
789 | } |
---|
790 | mtx_lock(f->priv_mtx); |
---|
791 | |
---|
792 | /* clear current cdev private data pointer */ |
---|
793 | mtx_lock(&usb_ref_lock); |
---|
794 | f->curr_cpd = NULL; |
---|
795 | mtx_unlock(&usb_ref_lock); |
---|
796 | |
---|
797 | /* check if we are watched by kevent */ |
---|
798 | KNOTE_LOCKED(&f->selinfo.si_note, 0); |
---|
799 | |
---|
800 | /* check if we are selected */ |
---|
801 | if (f->flag_isselect) { |
---|
802 | selwakeup(&f->selinfo); |
---|
803 | f->flag_isselect = 0; |
---|
804 | } |
---|
805 | /* check if a thread wants SIGIO */ |
---|
806 | if (f->async_p != NULL) { |
---|
807 | PROC_LOCK(f->async_p); |
---|
808 | kern_psignal(f->async_p, SIGIO); |
---|
809 | PROC_UNLOCK(f->async_p); |
---|
810 | f->async_p = NULL; |
---|
811 | } |
---|
812 | /* remove FWRITE and FREAD flags */ |
---|
813 | fflags &= ~(FWRITE | FREAD); |
---|
814 | |
---|
815 | /* flush written data, if any */ |
---|
816 | if ((f->fifo_index & 1) == USB_FIFO_TX) { |
---|
817 | |
---|
818 | if (!f->flag_iserror) { |
---|
819 | |
---|
820 | /* set flushing flag */ |
---|
821 | f->flag_flushing = 1; |
---|
822 | |
---|
823 | /* get the last packet in */ |
---|
824 | if (f->flag_have_fragment) { |
---|
825 | struct usb_mbuf *m; |
---|
826 | f->flag_have_fragment = 0; |
---|
827 | USB_IF_DEQUEUE(&f->free_q, m); |
---|
828 | if (m) { |
---|
829 | USB_IF_ENQUEUE(&f->used_q, m); |
---|
830 | } |
---|
831 | } |
---|
832 | |
---|
833 | /* start write transfer, if not already started */ |
---|
834 | (f->methods->f_start_write) (f); |
---|
835 | |
---|
836 | /* check if flushed already */ |
---|
837 | while (f->flag_flushing && |
---|
838 | (!f->flag_iserror)) { |
---|
839 | /* wait until all data has been written */ |
---|
840 | f->flag_sleeping = 1; |
---|
841 | err = cv_timedwait_sig(&f->cv_io, f->priv_mtx, |
---|
842 | USB_MS_TO_TICKS(USB_DEFAULT_TIMEOUT)); |
---|
843 | if (err) { |
---|
844 | DPRINTF("signal received\n"); |
---|
845 | break; |
---|
846 | } |
---|
847 | } |
---|
848 | } |
---|
849 | fflags |= FWRITE; |
---|
850 | |
---|
851 | /* stop write transfer, if not already stopped */ |
---|
852 | (f->methods->f_stop_write) (f); |
---|
853 | } else { |
---|
854 | fflags |= FREAD; |
---|
855 | |
---|
856 | /* stop write transfer, if not already stopped */ |
---|
857 | (f->methods->f_stop_read) (f); |
---|
858 | } |
---|
859 | |
---|
860 | /* check if we are sleeping */ |
---|
861 | if (f->flag_sleeping) { |
---|
862 | DPRINTFN(2, "Sleeping at close!\n"); |
---|
863 | } |
---|
864 | mtx_unlock(f->priv_mtx); |
---|
865 | |
---|
866 | /* call close method */ |
---|
867 | (f->methods->f_close) (f, fflags); |
---|
868 | |
---|
869 | DPRINTF("closed\n"); |
---|
870 | } |
---|
871 | |
---|
872 | /*------------------------------------------------------------------------* |
---|
873 | * usb_open - cdev callback |
---|
874 | *------------------------------------------------------------------------*/ |
---|
875 | static int |
---|
876 | usb_open(struct cdev *dev, int fflags, int devtype, struct thread *td) |
---|
877 | { |
---|
878 | struct usb_fs_privdata* pd = (struct usb_fs_privdata*)dev->si_drv1; |
---|
879 | struct usb_cdev_refdata refs; |
---|
880 | struct usb_cdev_privdata *cpd; |
---|
881 | int err, ep; |
---|
882 | |
---|
883 | DPRINTFN(2, "%s fflags=0x%08x\n", devtoname(dev), fflags); |
---|
884 | |
---|
885 | KASSERT(fflags & (FREAD|FWRITE), ("invalid open flags")); |
---|
886 | if (((fflags & FREAD) && !(pd->mode & FREAD)) || |
---|
887 | ((fflags & FWRITE) && !(pd->mode & FWRITE))) { |
---|
888 | DPRINTFN(2, "access mode not supported\n"); |
---|
889 | return (EPERM); |
---|
890 | } |
---|
891 | |
---|
892 | cpd = malloc(sizeof(*cpd), M_USBDEV, M_WAITOK | M_ZERO); |
---|
893 | ep = cpd->ep_addr = pd->ep_addr; |
---|
894 | |
---|
895 | usb_loc_fill(pd, cpd); |
---|
896 | err = usb_ref_device(cpd, &refs, 1); |
---|
897 | if (err) { |
---|
898 | DPRINTFN(2, "cannot ref device\n"); |
---|
899 | free(cpd, M_USBDEV); |
---|
900 | return (ENXIO); |
---|
901 | } |
---|
902 | cpd->fflags = fflags; /* access mode for open lifetime */ |
---|
903 | |
---|
904 | /* create FIFOs, if any */ |
---|
905 | err = usb_fifo_create(cpd, &refs); |
---|
906 | /* check for error */ |
---|
907 | if (err) { |
---|
908 | DPRINTFN(2, "cannot create fifo\n"); |
---|
909 | usb_unref_device(cpd, &refs); |
---|
910 | free(cpd, M_USBDEV); |
---|
911 | return (err); |
---|
912 | } |
---|
913 | if (fflags & FREAD) { |
---|
914 | err = usb_fifo_open(cpd, refs.rxfifo, fflags); |
---|
915 | if (err) { |
---|
916 | DPRINTFN(2, "read open failed\n"); |
---|
917 | usb_unref_device(cpd, &refs); |
---|
918 | free(cpd, M_USBDEV); |
---|
919 | return (err); |
---|
920 | } |
---|
921 | } |
---|
922 | if (fflags & FWRITE) { |
---|
923 | err = usb_fifo_open(cpd, refs.txfifo, fflags); |
---|
924 | if (err) { |
---|
925 | DPRINTFN(2, "write open failed\n"); |
---|
926 | if (fflags & FREAD) { |
---|
927 | usb_fifo_close(refs.rxfifo, fflags); |
---|
928 | } |
---|
929 | usb_unref_device(cpd, &refs); |
---|
930 | free(cpd, M_USBDEV); |
---|
931 | return (err); |
---|
932 | } |
---|
933 | } |
---|
934 | usb_unref_device(cpd, &refs); |
---|
935 | devfs_set_cdevpriv(cpd, usb_close); |
---|
936 | |
---|
937 | return (0); |
---|
938 | } |
---|
939 | |
---|
940 | /*------------------------------------------------------------------------* |
---|
941 | * usb_close - cdev callback |
---|
942 | *------------------------------------------------------------------------*/ |
---|
943 | static void |
---|
944 | usb_close(void *arg) |
---|
945 | { |
---|
946 | struct usb_cdev_refdata refs; |
---|
947 | struct usb_cdev_privdata *cpd = arg; |
---|
948 | int err; |
---|
949 | |
---|
950 | DPRINTFN(2, "cpd=%p\n", cpd); |
---|
951 | |
---|
952 | err = usb_ref_device(cpd, &refs, |
---|
953 | 2 /* uref and allow detached state */); |
---|
954 | if (err) { |
---|
955 | DPRINTFN(2, "Cannot grab USB reference when " |
---|
956 | "closing USB file handle\n"); |
---|
957 | goto done; |
---|
958 | } |
---|
959 | if (cpd->fflags & FREAD) { |
---|
960 | usb_fifo_close(refs.rxfifo, cpd->fflags); |
---|
961 | } |
---|
962 | if (cpd->fflags & FWRITE) { |
---|
963 | usb_fifo_close(refs.txfifo, cpd->fflags); |
---|
964 | } |
---|
965 | usb_unref_device(cpd, &refs); |
---|
966 | done: |
---|
967 | free(cpd, M_USBDEV); |
---|
968 | } |
---|
969 | |
---|
970 | static void |
---|
971 | usb_dev_init(void *arg) |
---|
972 | { |
---|
973 | mtx_init(&usb_ref_lock, "USB ref mutex", NULL, MTX_DEF); |
---|
974 | sx_init(&usb_sym_lock, "USB sym mutex"); |
---|
975 | TAILQ_INIT(&usb_sym_head); |
---|
976 | |
---|
977 | /* check the UGEN methods */ |
---|
978 | usb_fifo_check_methods(&usb_ugen_methods); |
---|
979 | } |
---|
980 | |
---|
981 | SYSINIT(usb_dev_init, SI_SUB_KLD, SI_ORDER_FIRST, usb_dev_init, NULL); |
---|
982 | |
---|
983 | static void |
---|
984 | usb_dev_init_post(void *arg) |
---|
985 | { |
---|
986 | /* |
---|
987 | * Create /dev/usb - this is needed for usbconfig(8), which |
---|
988 | * needs a well-known device name to access. |
---|
989 | */ |
---|
990 | usb_dev = make_dev(&usb_static_devsw, 0, UID_ROOT, GID_OPERATOR, |
---|
991 | 0644, USB_DEVICE_NAME); |
---|
992 | if (usb_dev == NULL) { |
---|
993 | DPRINTFN(0, "Could not create usb bus device\n"); |
---|
994 | } |
---|
995 | } |
---|
996 | |
---|
997 | SYSINIT(usb_dev_init_post, SI_SUB_KICK_SCHEDULER, SI_ORDER_FIRST, usb_dev_init_post, NULL); |
---|
998 | |
---|
999 | static void |
---|
1000 | usb_dev_uninit(void *arg) |
---|
1001 | { |
---|
1002 | if (usb_dev != NULL) { |
---|
1003 | destroy_dev(usb_dev); |
---|
1004 | usb_dev = NULL; |
---|
1005 | } |
---|
1006 | mtx_destroy(&usb_ref_lock); |
---|
1007 | sx_destroy(&usb_sym_lock); |
---|
1008 | } |
---|
1009 | |
---|
1010 | SYSUNINIT(usb_dev_uninit, SI_SUB_KICK_SCHEDULER, SI_ORDER_ANY, usb_dev_uninit, NULL); |
---|
1011 | |
---|
1012 | static int |
---|
1013 | usb_ioctl_f_sub(struct usb_fifo *f, u_long cmd, void *addr, |
---|
1014 | struct thread *td) |
---|
1015 | { |
---|
1016 | int error = 0; |
---|
1017 | |
---|
1018 | switch (cmd) { |
---|
1019 | case FIODTYPE: |
---|
1020 | *(int *)addr = 0; /* character device */ |
---|
1021 | break; |
---|
1022 | |
---|
1023 | case FIONBIO: |
---|
1024 | /* handled by upper FS layer */ |
---|
1025 | break; |
---|
1026 | |
---|
1027 | case FIOASYNC: |
---|
1028 | if (*(int *)addr) { |
---|
1029 | if (f->async_p != NULL) { |
---|
1030 | error = EBUSY; |
---|
1031 | break; |
---|
1032 | } |
---|
1033 | f->async_p = USB_TD_GET_PROC(td); |
---|
1034 | } else { |
---|
1035 | f->async_p = NULL; |
---|
1036 | } |
---|
1037 | break; |
---|
1038 | |
---|
1039 | /* XXX this is not the most general solution */ |
---|
1040 | case TIOCSPGRP: |
---|
1041 | if (f->async_p == NULL) { |
---|
1042 | error = EINVAL; |
---|
1043 | break; |
---|
1044 | } |
---|
1045 | if (*(int *)addr != USB_PROC_GET_GID(f->async_p)) { |
---|
1046 | error = EPERM; |
---|
1047 | break; |
---|
1048 | } |
---|
1049 | break; |
---|
1050 | default: |
---|
1051 | return (ENOIOCTL); |
---|
1052 | } |
---|
1053 | DPRINTFN(3, "cmd 0x%lx = %d\n", cmd, error); |
---|
1054 | return (error); |
---|
1055 | } |
---|
1056 | |
---|
1057 | /*------------------------------------------------------------------------* |
---|
1058 | * usb_ioctl - cdev callback |
---|
1059 | *------------------------------------------------------------------------*/ |
---|
1060 | static int |
---|
1061 | usb_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, int fflag, struct thread* td) |
---|
1062 | { |
---|
1063 | struct usb_cdev_refdata refs; |
---|
1064 | struct usb_cdev_privdata* cpd; |
---|
1065 | struct usb_fifo *f; |
---|
1066 | int fflags; |
---|
1067 | int err; |
---|
1068 | |
---|
1069 | DPRINTFN(2, "cmd=0x%lx\n", cmd); |
---|
1070 | |
---|
1071 | err = devfs_get_cdevpriv((void **)&cpd); |
---|
1072 | if (err != 0) |
---|
1073 | return (err); |
---|
1074 | |
---|
1075 | /* |
---|
1076 | * Performance optimisation: We try to check for IOCTL's that |
---|
1077 | * don't need the USB reference first. Then we grab the USB |
---|
1078 | * reference if we need it! |
---|
1079 | */ |
---|
1080 | err = usb_ref_device(cpd, &refs, 0 /* no uref */ ); |
---|
1081 | if (err) |
---|
1082 | return (ENXIO); |
---|
1083 | |
---|
1084 | fflags = cpd->fflags; |
---|
1085 | |
---|
1086 | f = NULL; /* set default value */ |
---|
1087 | err = ENOIOCTL; /* set default value */ |
---|
1088 | |
---|
1089 | if (fflags & FWRITE) { |
---|
1090 | f = refs.txfifo; |
---|
1091 | err = usb_ioctl_f_sub(f, cmd, addr, td); |
---|
1092 | } |
---|
1093 | if (fflags & FREAD) { |
---|
1094 | f = refs.rxfifo; |
---|
1095 | err = usb_ioctl_f_sub(f, cmd, addr, td); |
---|
1096 | } |
---|
1097 | KASSERT(f != NULL, ("fifo not found")); |
---|
1098 | if (err != ENOIOCTL) |
---|
1099 | goto done; |
---|
1100 | |
---|
1101 | err = (f->methods->f_ioctl) (f, cmd, addr, fflags); |
---|
1102 | |
---|
1103 | DPRINTFN(2, "f_ioctl cmd 0x%lx = %d\n", cmd, err); |
---|
1104 | |
---|
1105 | if (err != ENOIOCTL) |
---|
1106 | goto done; |
---|
1107 | |
---|
1108 | if (usb_usb_ref_device(cpd, &refs)) { |
---|
1109 | /* we lost the reference */ |
---|
1110 | return (ENXIO); |
---|
1111 | } |
---|
1112 | |
---|
1113 | err = (f->methods->f_ioctl_post) (f, cmd, addr, fflags); |
---|
1114 | |
---|
1115 | DPRINTFN(2, "f_ioctl_post cmd 0x%lx = %d\n", cmd, err); |
---|
1116 | |
---|
1117 | if (err == ENOIOCTL) |
---|
1118 | err = ENOTTY; |
---|
1119 | |
---|
1120 | if (err) |
---|
1121 | goto done; |
---|
1122 | |
---|
1123 | /* Wait for re-enumeration, if any */ |
---|
1124 | |
---|
1125 | while (f->udev->re_enumerate_wait != USB_RE_ENUM_DONE) { |
---|
1126 | |
---|
1127 | usb_unref_device(cpd, &refs); |
---|
1128 | |
---|
1129 | usb_pause_mtx(NULL, hz / 128); |
---|
1130 | |
---|
1131 | while (usb_ref_device(cpd, &refs, 1 /* need uref */)) { |
---|
1132 | if (usb_ref_device(cpd, &refs, 0)) { |
---|
1133 | /* device no longer exists */ |
---|
1134 | return (ENXIO); |
---|
1135 | } |
---|
1136 | usb_unref_device(cpd, &refs); |
---|
1137 | usb_pause_mtx(NULL, hz / 128); |
---|
1138 | } |
---|
1139 | } |
---|
1140 | |
---|
1141 | done: |
---|
1142 | usb_unref_device(cpd, &refs); |
---|
1143 | return (err); |
---|
1144 | } |
---|
1145 | |
---|
1146 | static void |
---|
1147 | usb_filter_detach(struct knote *kn) |
---|
1148 | { |
---|
1149 | struct usb_fifo *f = kn->kn_hook; |
---|
1150 | knlist_remove(&f->selinfo.si_note, kn, 0); |
---|
1151 | } |
---|
1152 | |
---|
1153 | static int |
---|
1154 | usb_filter_write(struct knote *kn, long hint) |
---|
1155 | { |
---|
1156 | struct usb_cdev_privdata* cpd; |
---|
1157 | struct usb_fifo *f; |
---|
1158 | struct usb_mbuf *m; |
---|
1159 | |
---|
1160 | DPRINTFN(2, "\n"); |
---|
1161 | |
---|
1162 | f = kn->kn_hook; |
---|
1163 | |
---|
1164 | USB_MTX_ASSERT(f->priv_mtx, MA_OWNED); |
---|
1165 | |
---|
1166 | cpd = f->curr_cpd; |
---|
1167 | if (cpd == NULL) { |
---|
1168 | m = (void *)1; |
---|
1169 | } else if (f->fs_ep_max == 0) { |
---|
1170 | if (f->flag_iserror) { |
---|
1171 | /* we got an error */ |
---|
1172 | m = (void *)1; |
---|
1173 | } else { |
---|
1174 | if (f->queue_data == NULL) { |
---|
1175 | /* |
---|
1176 | * start write transfer, if not |
---|
1177 | * already started |
---|
1178 | */ |
---|
1179 | (f->methods->f_start_write) (f); |
---|
1180 | } |
---|
1181 | /* check if any packets are available */ |
---|
1182 | USB_IF_POLL(&f->free_q, m); |
---|
1183 | } |
---|
1184 | } else { |
---|
1185 | if (f->flag_iscomplete) { |
---|
1186 | m = (void *)1; |
---|
1187 | } else { |
---|
1188 | m = NULL; |
---|
1189 | } |
---|
1190 | } |
---|
1191 | return (m ? 1 : 0); |
---|
1192 | } |
---|
1193 | |
---|
1194 | static int |
---|
1195 | usb_filter_read(struct knote *kn, long hint) |
---|
1196 | { |
---|
1197 | struct usb_cdev_privdata* cpd; |
---|
1198 | struct usb_fifo *f; |
---|
1199 | struct usb_mbuf *m; |
---|
1200 | |
---|
1201 | DPRINTFN(2, "\n"); |
---|
1202 | |
---|
1203 | f = kn->kn_hook; |
---|
1204 | |
---|
1205 | USB_MTX_ASSERT(f->priv_mtx, MA_OWNED); |
---|
1206 | |
---|
1207 | cpd = f->curr_cpd; |
---|
1208 | if (cpd == NULL) { |
---|
1209 | m = (void *)1; |
---|
1210 | } else if (f->fs_ep_max == 0) { |
---|
1211 | if (f->flag_iserror) { |
---|
1212 | /* we have an error */ |
---|
1213 | m = (void *)1; |
---|
1214 | } else { |
---|
1215 | if (f->queue_data == NULL) { |
---|
1216 | /* |
---|
1217 | * start read transfer, if not |
---|
1218 | * already started |
---|
1219 | */ |
---|
1220 | (f->methods->f_start_read) (f); |
---|
1221 | } |
---|
1222 | /* check if any packets are available */ |
---|
1223 | USB_IF_POLL(&f->used_q, m); |
---|
1224 | |
---|
1225 | /* start reading data, if any */ |
---|
1226 | if (m == NULL) |
---|
1227 | (f->methods->f_start_read) (f); |
---|
1228 | } |
---|
1229 | } else { |
---|
1230 | if (f->flag_iscomplete) { |
---|
1231 | m = (void *)1; |
---|
1232 | } else { |
---|
1233 | m = NULL; |
---|
1234 | } |
---|
1235 | } |
---|
1236 | return (m ? 1 : 0); |
---|
1237 | } |
---|
1238 | |
---|
1239 | static struct filterops usb_filtops_write = { |
---|
1240 | .f_isfd = 1, |
---|
1241 | .f_detach = usb_filter_detach, |
---|
1242 | .f_event = usb_filter_write, |
---|
1243 | }; |
---|
1244 | |
---|
1245 | static struct filterops usb_filtops_read = { |
---|
1246 | .f_isfd = 1, |
---|
1247 | .f_detach = usb_filter_detach, |
---|
1248 | .f_event = usb_filter_read, |
---|
1249 | }; |
---|
1250 | |
---|
1251 | |
---|
1252 | /* ARGSUSED */ |
---|
1253 | static int |
---|
1254 | usb_kqfilter(struct cdev* dev, struct knote *kn) |
---|
1255 | { |
---|
1256 | struct usb_cdev_refdata refs; |
---|
1257 | struct usb_cdev_privdata* cpd; |
---|
1258 | struct usb_fifo *f; |
---|
1259 | int fflags; |
---|
1260 | int err = EINVAL; |
---|
1261 | |
---|
1262 | DPRINTFN(2, "\n"); |
---|
1263 | |
---|
1264 | if (devfs_get_cdevpriv((void **)&cpd) != 0 || |
---|
1265 | usb_ref_device(cpd, &refs, 0) != 0) |
---|
1266 | return (ENXIO); |
---|
1267 | |
---|
1268 | fflags = cpd->fflags; |
---|
1269 | |
---|
1270 | /* Figure out who needs service */ |
---|
1271 | switch (kn->kn_filter) { |
---|
1272 | case EVFILT_WRITE: |
---|
1273 | if (fflags & FWRITE) { |
---|
1274 | f = refs.txfifo; |
---|
1275 | kn->kn_fop = &usb_filtops_write; |
---|
1276 | err = 0; |
---|
1277 | } |
---|
1278 | break; |
---|
1279 | case EVFILT_READ: |
---|
1280 | if (fflags & FREAD) { |
---|
1281 | f = refs.rxfifo; |
---|
1282 | kn->kn_fop = &usb_filtops_read; |
---|
1283 | err = 0; |
---|
1284 | } |
---|
1285 | break; |
---|
1286 | default: |
---|
1287 | err = EOPNOTSUPP; |
---|
1288 | break; |
---|
1289 | } |
---|
1290 | |
---|
1291 | if (err == 0) { |
---|
1292 | kn->kn_hook = f; |
---|
1293 | mtx_lock(f->priv_mtx); |
---|
1294 | knlist_add(&f->selinfo.si_note, kn, 1); |
---|
1295 | mtx_unlock(f->priv_mtx); |
---|
1296 | } |
---|
1297 | |
---|
1298 | usb_unref_device(cpd, &refs); |
---|
1299 | return (err); |
---|
1300 | } |
---|
1301 | |
---|
1302 | /* ARGSUSED */ |
---|
1303 | static int |
---|
1304 | usb_poll(struct cdev* dev, int events, struct thread* td) |
---|
1305 | { |
---|
1306 | struct usb_cdev_refdata refs; |
---|
1307 | struct usb_cdev_privdata* cpd; |
---|
1308 | struct usb_fifo *f; |
---|
1309 | struct usb_mbuf *m; |
---|
1310 | int fflags, revents; |
---|
1311 | |
---|
1312 | if (devfs_get_cdevpriv((void **)&cpd) != 0 || |
---|
1313 | usb_ref_device(cpd, &refs, 0) != 0) |
---|
1314 | return (events & |
---|
1315 | (POLLHUP|POLLIN|POLLRDNORM|POLLOUT|POLLWRNORM)); |
---|
1316 | |
---|
1317 | fflags = cpd->fflags; |
---|
1318 | |
---|
1319 | /* Figure out who needs service */ |
---|
1320 | revents = 0; |
---|
1321 | if ((events & (POLLOUT | POLLWRNORM)) && |
---|
1322 | (fflags & FWRITE)) { |
---|
1323 | |
---|
1324 | f = refs.txfifo; |
---|
1325 | |
---|
1326 | mtx_lock(f->priv_mtx); |
---|
1327 | |
---|
1328 | if (!refs.is_usbfs) { |
---|
1329 | if (f->flag_iserror) { |
---|
1330 | /* we got an error */ |
---|
1331 | m = (void *)1; |
---|
1332 | } else { |
---|
1333 | if (f->queue_data == NULL) { |
---|
1334 | /* |
---|
1335 | * start write transfer, if not |
---|
1336 | * already started |
---|
1337 | */ |
---|
1338 | (f->methods->f_start_write) (f); |
---|
1339 | } |
---|
1340 | /* check if any packets are available */ |
---|
1341 | USB_IF_POLL(&f->free_q, m); |
---|
1342 | } |
---|
1343 | } else { |
---|
1344 | if (f->flag_iscomplete) { |
---|
1345 | m = (void *)1; |
---|
1346 | } else { |
---|
1347 | m = NULL; |
---|
1348 | } |
---|
1349 | } |
---|
1350 | |
---|
1351 | if (m) { |
---|
1352 | revents |= events & (POLLOUT | POLLWRNORM); |
---|
1353 | } else { |
---|
1354 | f->flag_isselect = 1; |
---|
1355 | selrecord(td, &f->selinfo); |
---|
1356 | } |
---|
1357 | |
---|
1358 | mtx_unlock(f->priv_mtx); |
---|
1359 | } |
---|
1360 | if ((events & (POLLIN | POLLRDNORM)) && |
---|
1361 | (fflags & FREAD)) { |
---|
1362 | |
---|
1363 | f = refs.rxfifo; |
---|
1364 | |
---|
1365 | mtx_lock(f->priv_mtx); |
---|
1366 | |
---|
1367 | if (!refs.is_usbfs) { |
---|
1368 | if (f->flag_iserror) { |
---|
1369 | /* we have an error */ |
---|
1370 | m = (void *)1; |
---|
1371 | } else { |
---|
1372 | if (f->queue_data == NULL) { |
---|
1373 | /* |
---|
1374 | * start read transfer, if not |
---|
1375 | * already started |
---|
1376 | */ |
---|
1377 | (f->methods->f_start_read) (f); |
---|
1378 | } |
---|
1379 | /* check if any packets are available */ |
---|
1380 | USB_IF_POLL(&f->used_q, m); |
---|
1381 | } |
---|
1382 | } else { |
---|
1383 | if (f->flag_iscomplete) { |
---|
1384 | m = (void *)1; |
---|
1385 | } else { |
---|
1386 | m = NULL; |
---|
1387 | } |
---|
1388 | } |
---|
1389 | |
---|
1390 | if (m) { |
---|
1391 | revents |= events & (POLLIN | POLLRDNORM); |
---|
1392 | } else { |
---|
1393 | f->flag_isselect = 1; |
---|
1394 | selrecord(td, &f->selinfo); |
---|
1395 | |
---|
1396 | if (!refs.is_usbfs) { |
---|
1397 | /* start reading data */ |
---|
1398 | (f->methods->f_start_read) (f); |
---|
1399 | } |
---|
1400 | } |
---|
1401 | |
---|
1402 | mtx_unlock(f->priv_mtx); |
---|
1403 | } |
---|
1404 | usb_unref_device(cpd, &refs); |
---|
1405 | return (revents); |
---|
1406 | } |
---|
1407 | |
---|
1408 | static int |
---|
1409 | usb_read(struct cdev *dev, struct uio *uio, int ioflag) |
---|
1410 | { |
---|
1411 | struct usb_cdev_refdata refs; |
---|
1412 | struct usb_cdev_privdata* cpd; |
---|
1413 | struct usb_fifo *f; |
---|
1414 | struct usb_mbuf *m; |
---|
1415 | int fflags; |
---|
1416 | int resid; |
---|
1417 | int io_len; |
---|
1418 | int err; |
---|
1419 | uint8_t tr_data = 0; |
---|
1420 | |
---|
1421 | err = devfs_get_cdevpriv((void **)&cpd); |
---|
1422 | if (err != 0) |
---|
1423 | return (err); |
---|
1424 | |
---|
1425 | err = usb_ref_device(cpd, &refs, 0 /* no uref */ ); |
---|
1426 | if (err) |
---|
1427 | return (ENXIO); |
---|
1428 | |
---|
1429 | fflags = cpd->fflags; |
---|
1430 | |
---|
1431 | f = refs.rxfifo; |
---|
1432 | if (f == NULL) { |
---|
1433 | /* should not happen */ |
---|
1434 | usb_unref_device(cpd, &refs); |
---|
1435 | return (EPERM); |
---|
1436 | } |
---|
1437 | |
---|
1438 | resid = uio->uio_resid; |
---|
1439 | |
---|
1440 | mtx_lock(f->priv_mtx); |
---|
1441 | |
---|
1442 | /* check for permanent read error */ |
---|
1443 | if (f->flag_iserror) { |
---|
1444 | err = EIO; |
---|
1445 | goto done; |
---|
1446 | } |
---|
1447 | /* check if USB-FS interface is active */ |
---|
1448 | if (refs.is_usbfs) { |
---|
1449 | /* |
---|
1450 | * The queue is used for events that should be |
---|
1451 | * retrieved using the "USB_FS_COMPLETE" ioctl. |
---|
1452 | */ |
---|
1453 | err = EINVAL; |
---|
1454 | goto done; |
---|
1455 | } |
---|
1456 | while (uio->uio_resid > 0) { |
---|
1457 | |
---|
1458 | USB_IF_DEQUEUE(&f->used_q, m); |
---|
1459 | |
---|
1460 | if (m == NULL) { |
---|
1461 | |
---|
1462 | /* start read transfer, if not already started */ |
---|
1463 | |
---|
1464 | (f->methods->f_start_read) (f); |
---|
1465 | |
---|
1466 | if (ioflag & IO_NDELAY) { |
---|
1467 | if (tr_data) { |
---|
1468 | /* return length before error */ |
---|
1469 | break; |
---|
1470 | } |
---|
1471 | err = EWOULDBLOCK; |
---|
1472 | break; |
---|
1473 | } |
---|
1474 | DPRINTF("sleeping\n"); |
---|
1475 | |
---|
1476 | err = usb_fifo_wait(f); |
---|
1477 | if (err) { |
---|
1478 | break; |
---|
1479 | } |
---|
1480 | continue; |
---|
1481 | } |
---|
1482 | if (f->methods->f_filter_read) { |
---|
1483 | /* |
---|
1484 | * Sometimes it is convenient to process data at the |
---|
1485 | * expense of a userland process instead of a kernel |
---|
1486 | * process. |
---|
1487 | */ |
---|
1488 | (f->methods->f_filter_read) (f, m); |
---|
1489 | } |
---|
1490 | tr_data = 1; |
---|
1491 | |
---|
1492 | io_len = MIN(m->cur_data_len, uio->uio_resid); |
---|
1493 | |
---|
1494 | DPRINTFN(2, "transfer %d bytes from %p\n", |
---|
1495 | io_len, m->cur_data_ptr); |
---|
1496 | |
---|
1497 | err = usb_fifo_uiomove(f, |
---|
1498 | m->cur_data_ptr, io_len, uio); |
---|
1499 | |
---|
1500 | m->cur_data_len -= io_len; |
---|
1501 | m->cur_data_ptr += io_len; |
---|
1502 | |
---|
1503 | if (m->cur_data_len == 0) { |
---|
1504 | |
---|
1505 | uint8_t last_packet; |
---|
1506 | |
---|
1507 | last_packet = m->last_packet; |
---|
1508 | |
---|
1509 | USB_IF_ENQUEUE(&f->free_q, m); |
---|
1510 | |
---|
1511 | if (last_packet) { |
---|
1512 | /* keep framing */ |
---|
1513 | break; |
---|
1514 | } |
---|
1515 | } else { |
---|
1516 | USB_IF_PREPEND(&f->used_q, m); |
---|
1517 | } |
---|
1518 | |
---|
1519 | if (err) { |
---|
1520 | break; |
---|
1521 | } |
---|
1522 | } |
---|
1523 | done: |
---|
1524 | mtx_unlock(f->priv_mtx); |
---|
1525 | |
---|
1526 | usb_unref_device(cpd, &refs); |
---|
1527 | |
---|
1528 | return (err); |
---|
1529 | } |
---|
1530 | |
---|
1531 | static int |
---|
1532 | usb_write(struct cdev *dev, struct uio *uio, int ioflag) |
---|
1533 | { |
---|
1534 | struct usb_cdev_refdata refs; |
---|
1535 | struct usb_cdev_privdata* cpd; |
---|
1536 | struct usb_fifo *f; |
---|
1537 | struct usb_mbuf *m; |
---|
1538 | uint8_t *pdata; |
---|
1539 | int fflags; |
---|
1540 | int resid; |
---|
1541 | int io_len; |
---|
1542 | int err; |
---|
1543 | uint8_t tr_data = 0; |
---|
1544 | |
---|
1545 | DPRINTFN(2, "\n"); |
---|
1546 | |
---|
1547 | err = devfs_get_cdevpriv((void **)&cpd); |
---|
1548 | if (err != 0) |
---|
1549 | return (err); |
---|
1550 | |
---|
1551 | err = usb_ref_device(cpd, &refs, 0 /* no uref */ ); |
---|
1552 | if (err) |
---|
1553 | return (ENXIO); |
---|
1554 | |
---|
1555 | fflags = cpd->fflags; |
---|
1556 | |
---|
1557 | f = refs.txfifo; |
---|
1558 | if (f == NULL) { |
---|
1559 | /* should not happen */ |
---|
1560 | usb_unref_device(cpd, &refs); |
---|
1561 | return (EPERM); |
---|
1562 | } |
---|
1563 | resid = uio->uio_resid; |
---|
1564 | |
---|
1565 | mtx_lock(f->priv_mtx); |
---|
1566 | |
---|
1567 | /* check for permanent write error */ |
---|
1568 | if (f->flag_iserror) { |
---|
1569 | err = EIO; |
---|
1570 | goto done; |
---|
1571 | } |
---|
1572 | /* check if USB-FS interface is active */ |
---|
1573 | if (refs.is_usbfs) { |
---|
1574 | /* |
---|
1575 | * The queue is used for events that should be |
---|
1576 | * retrieved using the "USB_FS_COMPLETE" ioctl. |
---|
1577 | */ |
---|
1578 | err = EINVAL; |
---|
1579 | goto done; |
---|
1580 | } |
---|
1581 | if (f->queue_data == NULL) { |
---|
1582 | /* start write transfer, if not already started */ |
---|
1583 | (f->methods->f_start_write) (f); |
---|
1584 | } |
---|
1585 | /* we allow writing zero length data */ |
---|
1586 | do { |
---|
1587 | USB_IF_DEQUEUE(&f->free_q, m); |
---|
1588 | |
---|
1589 | if (m == NULL) { |
---|
1590 | |
---|
1591 | if (ioflag & IO_NDELAY) { |
---|
1592 | if (tr_data) { |
---|
1593 | /* return length before error */ |
---|
1594 | break; |
---|
1595 | } |
---|
1596 | err = EWOULDBLOCK; |
---|
1597 | break; |
---|
1598 | } |
---|
1599 | DPRINTF("sleeping\n"); |
---|
1600 | |
---|
1601 | err = usb_fifo_wait(f); |
---|
1602 | if (err) { |
---|
1603 | break; |
---|
1604 | } |
---|
1605 | continue; |
---|
1606 | } |
---|
1607 | tr_data = 1; |
---|
1608 | |
---|
1609 | if (f->flag_have_fragment == 0) { |
---|
1610 | USB_MBUF_RESET(m); |
---|
1611 | io_len = m->cur_data_len; |
---|
1612 | pdata = m->cur_data_ptr; |
---|
1613 | if (io_len > uio->uio_resid) |
---|
1614 | io_len = uio->uio_resid; |
---|
1615 | m->cur_data_len = io_len; |
---|
1616 | } else { |
---|
1617 | io_len = m->max_data_len - m->cur_data_len; |
---|
1618 | pdata = m->cur_data_ptr + m->cur_data_len; |
---|
1619 | if (io_len > uio->uio_resid) |
---|
1620 | io_len = uio->uio_resid; |
---|
1621 | m->cur_data_len += io_len; |
---|
1622 | } |
---|
1623 | |
---|
1624 | DPRINTFN(2, "transfer %d bytes to %p\n", |
---|
1625 | io_len, pdata); |
---|
1626 | |
---|
1627 | err = usb_fifo_uiomove(f, pdata, io_len, uio); |
---|
1628 | |
---|
1629 | if (err) { |
---|
1630 | f->flag_have_fragment = 0; |
---|
1631 | USB_IF_ENQUEUE(&f->free_q, m); |
---|
1632 | break; |
---|
1633 | } |
---|
1634 | |
---|
1635 | /* check if the buffer is ready to be transmitted */ |
---|
1636 | |
---|
1637 | if ((f->flag_write_defrag == 0) || |
---|
1638 | (m->cur_data_len == m->max_data_len)) { |
---|
1639 | f->flag_have_fragment = 0; |
---|
1640 | |
---|
1641 | /* |
---|
1642 | * Check for write filter: |
---|
1643 | * |
---|
1644 | * Sometimes it is convenient to process data |
---|
1645 | * at the expense of a userland process |
---|
1646 | * instead of a kernel process. |
---|
1647 | */ |
---|
1648 | if (f->methods->f_filter_write) { |
---|
1649 | (f->methods->f_filter_write) (f, m); |
---|
1650 | } |
---|
1651 | |
---|
1652 | /* Put USB mbuf in the used queue */ |
---|
1653 | USB_IF_ENQUEUE(&f->used_q, m); |
---|
1654 | |
---|
1655 | /* Start writing data, if not already started */ |
---|
1656 | (f->methods->f_start_write) (f); |
---|
1657 | } else { |
---|
1658 | /* Wait for more data or close */ |
---|
1659 | f->flag_have_fragment = 1; |
---|
1660 | USB_IF_PREPEND(&f->free_q, m); |
---|
1661 | } |
---|
1662 | |
---|
1663 | } while (uio->uio_resid > 0); |
---|
1664 | done: |
---|
1665 | mtx_unlock(f->priv_mtx); |
---|
1666 | |
---|
1667 | usb_unref_device(cpd, &refs); |
---|
1668 | |
---|
1669 | return (err); |
---|
1670 | } |
---|
1671 | |
---|
1672 | int |
---|
1673 | usb_static_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag, |
---|
1674 | struct thread *td) |
---|
1675 | { |
---|
1676 | union { |
---|
1677 | struct usb_read_dir *urd; |
---|
1678 | void* data; |
---|
1679 | } u; |
---|
1680 | int err; |
---|
1681 | |
---|
1682 | u.data = data; |
---|
1683 | switch (cmd) { |
---|
1684 | case USB_READ_DIR: |
---|
1685 | err = usb_read_symlink(u.urd->urd_data, |
---|
1686 | u.urd->urd_startentry, u.urd->urd_maxlen); |
---|
1687 | break; |
---|
1688 | case USB_DEV_QUIRK_GET: |
---|
1689 | case USB_QUIRK_NAME_GET: |
---|
1690 | case USB_DEV_QUIRK_ADD: |
---|
1691 | case USB_DEV_QUIRK_REMOVE: |
---|
1692 | err = usb_quirk_ioctl_p(cmd, data, fflag, td); |
---|
1693 | break; |
---|
1694 | case USB_GET_TEMPLATE: |
---|
1695 | *(int *)data = usb_template; |
---|
1696 | err = 0; |
---|
1697 | break; |
---|
1698 | case USB_SET_TEMPLATE: |
---|
1699 | err = priv_check(curthread, PRIV_DRIVER); |
---|
1700 | if (err) |
---|
1701 | break; |
---|
1702 | usb_template = *(int *)data; |
---|
1703 | break; |
---|
1704 | default: |
---|
1705 | err = ENOTTY; |
---|
1706 | break; |
---|
1707 | } |
---|
1708 | return (err); |
---|
1709 | } |
---|
1710 | |
---|
1711 | static int |
---|
1712 | usb_fifo_uiomove(struct usb_fifo *f, void *cp, |
---|
1713 | int n, struct uio *uio) |
---|
1714 | { |
---|
1715 | int error; |
---|
1716 | |
---|
1717 | mtx_unlock(f->priv_mtx); |
---|
1718 | |
---|
1719 | /* |
---|
1720 | * "uiomove()" can sleep so one needs to make a wrapper, |
---|
1721 | * exiting the mutex and checking things: |
---|
1722 | */ |
---|
1723 | error = uiomove(cp, n, uio); |
---|
1724 | |
---|
1725 | mtx_lock(f->priv_mtx); |
---|
1726 | |
---|
1727 | return (error); |
---|
1728 | } |
---|
1729 | |
---|
1730 | int |
---|
1731 | usb_fifo_wait(struct usb_fifo *f) |
---|
1732 | { |
---|
1733 | int err; |
---|
1734 | |
---|
1735 | USB_MTX_ASSERT(f->priv_mtx, MA_OWNED); |
---|
1736 | |
---|
1737 | if (f->flag_iserror) { |
---|
1738 | /* we are gone */ |
---|
1739 | return (EIO); |
---|
1740 | } |
---|
1741 | f->flag_sleeping = 1; |
---|
1742 | |
---|
1743 | err = cv_wait_sig(&f->cv_io, f->priv_mtx); |
---|
1744 | |
---|
1745 | if (f->flag_iserror) { |
---|
1746 | /* we are gone */ |
---|
1747 | err = EIO; |
---|
1748 | } |
---|
1749 | return (err); |
---|
1750 | } |
---|
1751 | |
---|
1752 | void |
---|
1753 | usb_fifo_signal(struct usb_fifo *f) |
---|
1754 | { |
---|
1755 | if (f->flag_sleeping) { |
---|
1756 | f->flag_sleeping = 0; |
---|
1757 | cv_broadcast(&f->cv_io); |
---|
1758 | } |
---|
1759 | } |
---|
1760 | |
---|
1761 | void |
---|
1762 | usb_fifo_wakeup(struct usb_fifo *f) |
---|
1763 | { |
---|
1764 | usb_fifo_signal(f); |
---|
1765 | |
---|
1766 | KNOTE_LOCKED(&f->selinfo.si_note, 0); |
---|
1767 | |
---|
1768 | if (f->flag_isselect) { |
---|
1769 | selwakeup(&f->selinfo); |
---|
1770 | f->flag_isselect = 0; |
---|
1771 | } |
---|
1772 | if (f->async_p != NULL) { |
---|
1773 | PROC_LOCK(f->async_p); |
---|
1774 | kern_psignal(f->async_p, SIGIO); |
---|
1775 | PROC_UNLOCK(f->async_p); |
---|
1776 | } |
---|
1777 | } |
---|
1778 | |
---|
1779 | static int |
---|
1780 | usb_fifo_dummy_open(struct usb_fifo *fifo, int fflags) |
---|
1781 | { |
---|
1782 | return (0); |
---|
1783 | } |
---|
1784 | |
---|
1785 | static void |
---|
1786 | usb_fifo_dummy_close(struct usb_fifo *fifo, int fflags) |
---|
1787 | { |
---|
1788 | return; |
---|
1789 | } |
---|
1790 | |
---|
1791 | static int |
---|
1792 | usb_fifo_dummy_ioctl(struct usb_fifo *fifo, u_long cmd, void *addr, int fflags) |
---|
1793 | { |
---|
1794 | return (ENOIOCTL); |
---|
1795 | } |
---|
1796 | |
---|
1797 | static void |
---|
1798 | usb_fifo_dummy_cmd(struct usb_fifo *fifo) |
---|
1799 | { |
---|
1800 | fifo->flag_flushing = 0; /* not flushing */ |
---|
1801 | } |
---|
1802 | |
---|
1803 | static void |
---|
1804 | usb_fifo_check_methods(struct usb_fifo_methods *pm) |
---|
1805 | { |
---|
1806 | /* check that all callback functions are OK */ |
---|
1807 | |
---|
1808 | if (pm->f_open == NULL) |
---|
1809 | pm->f_open = &usb_fifo_dummy_open; |
---|
1810 | |
---|
1811 | if (pm->f_close == NULL) |
---|
1812 | pm->f_close = &usb_fifo_dummy_close; |
---|
1813 | |
---|
1814 | if (pm->f_ioctl == NULL) |
---|
1815 | pm->f_ioctl = &usb_fifo_dummy_ioctl; |
---|
1816 | |
---|
1817 | if (pm->f_ioctl_post == NULL) |
---|
1818 | pm->f_ioctl_post = &usb_fifo_dummy_ioctl; |
---|
1819 | |
---|
1820 | if (pm->f_start_read == NULL) |
---|
1821 | pm->f_start_read = &usb_fifo_dummy_cmd; |
---|
1822 | |
---|
1823 | if (pm->f_stop_read == NULL) |
---|
1824 | pm->f_stop_read = &usb_fifo_dummy_cmd; |
---|
1825 | |
---|
1826 | if (pm->f_start_write == NULL) |
---|
1827 | pm->f_start_write = &usb_fifo_dummy_cmd; |
---|
1828 | |
---|
1829 | if (pm->f_stop_write == NULL) |
---|
1830 | pm->f_stop_write = &usb_fifo_dummy_cmd; |
---|
1831 | } |
---|
1832 | |
---|
1833 | /*------------------------------------------------------------------------* |
---|
1834 | * usb_fifo_attach |
---|
1835 | * |
---|
1836 | * The following function will create a duplex FIFO. |
---|
1837 | * |
---|
1838 | * Return values: |
---|
1839 | * 0: Success. |
---|
1840 | * Else: Failure. |
---|
1841 | *------------------------------------------------------------------------*/ |
---|
1842 | int |
---|
1843 | usb_fifo_attach(struct usb_device *udev, void *priv_sc, |
---|
1844 | struct mtx *priv_mtx, struct usb_fifo_methods *pm, |
---|
1845 | struct usb_fifo_sc *f_sc, uint16_t unit, int16_t subunit, |
---|
1846 | uint8_t iface_index, uid_t uid, gid_t gid, int mode) |
---|
1847 | { |
---|
1848 | struct usb_fifo *f_tx; |
---|
1849 | struct usb_fifo *f_rx; |
---|
1850 | char devname[32]; |
---|
1851 | uint8_t n; |
---|
1852 | |
---|
1853 | f_sc->fp[USB_FIFO_TX] = NULL; |
---|
1854 | f_sc->fp[USB_FIFO_RX] = NULL; |
---|
1855 | |
---|
1856 | if (pm == NULL) |
---|
1857 | return (EINVAL); |
---|
1858 | |
---|
1859 | /* check the methods */ |
---|
1860 | usb_fifo_check_methods(pm); |
---|
1861 | |
---|
1862 | if (priv_mtx == NULL) |
---|
1863 | priv_mtx = &Giant; |
---|
1864 | |
---|
1865 | /* search for a free FIFO slot */ |
---|
1866 | for (n = 0;; n += 2) { |
---|
1867 | |
---|
1868 | if (n == USB_FIFO_MAX) { |
---|
1869 | /* end of FIFOs reached */ |
---|
1870 | return (ENOMEM); |
---|
1871 | } |
---|
1872 | /* Check for TX FIFO */ |
---|
1873 | if (udev->fifo[n + USB_FIFO_TX] != NULL) { |
---|
1874 | continue; |
---|
1875 | } |
---|
1876 | /* Check for RX FIFO */ |
---|
1877 | if (udev->fifo[n + USB_FIFO_RX] != NULL) { |
---|
1878 | continue; |
---|
1879 | } |
---|
1880 | break; |
---|
1881 | } |
---|
1882 | |
---|
1883 | f_tx = usb_fifo_alloc(priv_mtx); |
---|
1884 | f_rx = usb_fifo_alloc(priv_mtx); |
---|
1885 | |
---|
1886 | if ((f_tx == NULL) || (f_rx == NULL)) { |
---|
1887 | usb_fifo_free(f_tx); |
---|
1888 | usb_fifo_free(f_rx); |
---|
1889 | return (ENOMEM); |
---|
1890 | } |
---|
1891 | /* initialise FIFO structures */ |
---|
1892 | |
---|
1893 | f_tx->fifo_index = n + USB_FIFO_TX; |
---|
1894 | f_tx->dev_ep_index = -1; |
---|
1895 | f_tx->priv_sc0 = priv_sc; |
---|
1896 | f_tx->methods = pm; |
---|
1897 | f_tx->iface_index = iface_index; |
---|
1898 | f_tx->udev = udev; |
---|
1899 | |
---|
1900 | f_rx->fifo_index = n + USB_FIFO_RX; |
---|
1901 | f_rx->dev_ep_index = -1; |
---|
1902 | f_rx->priv_sc0 = priv_sc; |
---|
1903 | f_rx->methods = pm; |
---|
1904 | f_rx->iface_index = iface_index; |
---|
1905 | f_rx->udev = udev; |
---|
1906 | |
---|
1907 | f_sc->fp[USB_FIFO_TX] = f_tx; |
---|
1908 | f_sc->fp[USB_FIFO_RX] = f_rx; |
---|
1909 | |
---|
1910 | mtx_lock(&usb_ref_lock); |
---|
1911 | udev->fifo[f_tx->fifo_index] = f_tx; |
---|
1912 | udev->fifo[f_rx->fifo_index] = f_rx; |
---|
1913 | mtx_unlock(&usb_ref_lock); |
---|
1914 | |
---|
1915 | for (n = 0; n != 4; n++) { |
---|
1916 | |
---|
1917 | if (pm->basename[n] == NULL) { |
---|
1918 | continue; |
---|
1919 | } |
---|
1920 | if (subunit < 0) { |
---|
1921 | if (snprintf(devname, sizeof(devname), |
---|
1922 | "%s%u%s", pm->basename[n], |
---|
1923 | unit, pm->postfix[n] ? |
---|
1924 | pm->postfix[n] : "")) { |
---|
1925 | /* ignore */ |
---|
1926 | } |
---|
1927 | } else { |
---|
1928 | if (snprintf(devname, sizeof(devname), |
---|
1929 | "%s%u.%d%s", pm->basename[n], |
---|
1930 | unit, subunit, pm->postfix[n] ? |
---|
1931 | pm->postfix[n] : "")) { |
---|
1932 | /* ignore */ |
---|
1933 | } |
---|
1934 | } |
---|
1935 | |
---|
1936 | /* |
---|
1937 | * Distribute the symbolic links into two FIFO structures: |
---|
1938 | */ |
---|
1939 | if (n & 1) { |
---|
1940 | f_rx->symlink[n / 2] = |
---|
1941 | usb_alloc_symlink(devname); |
---|
1942 | } else { |
---|
1943 | f_tx->symlink[n / 2] = |
---|
1944 | usb_alloc_symlink(devname); |
---|
1945 | } |
---|
1946 | |
---|
1947 | /* Create the device */ |
---|
1948 | f_sc->dev = usb_make_dev(udev, devname, -1, |
---|
1949 | f_tx->fifo_index & f_rx->fifo_index, |
---|
1950 | FREAD|FWRITE, uid, gid, mode); |
---|
1951 | } |
---|
1952 | |
---|
1953 | DPRINTFN(2, "attached %p/%p\n", f_tx, f_rx); |
---|
1954 | return (0); |
---|
1955 | } |
---|
1956 | |
---|
1957 | /*------------------------------------------------------------------------* |
---|
1958 | * usb_fifo_alloc_buffer |
---|
1959 | * |
---|
1960 | * Return values: |
---|
1961 | * 0: Success |
---|
1962 | * Else failure |
---|
1963 | *------------------------------------------------------------------------*/ |
---|
1964 | int |
---|
1965 | usb_fifo_alloc_buffer(struct usb_fifo *f, usb_size_t bufsize, |
---|
1966 | uint16_t nbuf) |
---|
1967 | { |
---|
1968 | usb_fifo_free_buffer(f); |
---|
1969 | |
---|
1970 | /* allocate an endpoint */ |
---|
1971 | f->free_q.ifq_maxlen = nbuf; |
---|
1972 | f->used_q.ifq_maxlen = nbuf; |
---|
1973 | |
---|
1974 | f->queue_data = usb_alloc_mbufs( |
---|
1975 | M_USBDEV, &f->free_q, bufsize, nbuf); |
---|
1976 | |
---|
1977 | if ((f->queue_data == NULL) && bufsize && nbuf) { |
---|
1978 | return (ENOMEM); |
---|
1979 | } |
---|
1980 | return (0); /* success */ |
---|
1981 | } |
---|
1982 | |
---|
1983 | /*------------------------------------------------------------------------* |
---|
1984 | * usb_fifo_free_buffer |
---|
1985 | * |
---|
1986 | * This function will free the buffers associated with a FIFO. This |
---|
1987 | * function can be called multiple times in a row. |
---|
1988 | *------------------------------------------------------------------------*/ |
---|
1989 | void |
---|
1990 | usb_fifo_free_buffer(struct usb_fifo *f) |
---|
1991 | { |
---|
1992 | if (f->queue_data) { |
---|
1993 | /* free old buffer */ |
---|
1994 | free(f->queue_data, M_USBDEV); |
---|
1995 | f->queue_data = NULL; |
---|
1996 | } |
---|
1997 | /* reset queues */ |
---|
1998 | |
---|
1999 | memset(&f->free_q, 0, sizeof(f->free_q)); |
---|
2000 | memset(&f->used_q, 0, sizeof(f->used_q)); |
---|
2001 | } |
---|
2002 | |
---|
2003 | void |
---|
2004 | usb_fifo_detach(struct usb_fifo_sc *f_sc) |
---|
2005 | { |
---|
2006 | if (f_sc == NULL) { |
---|
2007 | return; |
---|
2008 | } |
---|
2009 | usb_fifo_free(f_sc->fp[USB_FIFO_TX]); |
---|
2010 | usb_fifo_free(f_sc->fp[USB_FIFO_RX]); |
---|
2011 | |
---|
2012 | f_sc->fp[USB_FIFO_TX] = NULL; |
---|
2013 | f_sc->fp[USB_FIFO_RX] = NULL; |
---|
2014 | |
---|
2015 | usb_destroy_dev(f_sc->dev); |
---|
2016 | |
---|
2017 | f_sc->dev = NULL; |
---|
2018 | |
---|
2019 | DPRINTFN(2, "detached %p\n", f_sc); |
---|
2020 | } |
---|
2021 | |
---|
2022 | usb_size_t |
---|
2023 | usb_fifo_put_bytes_max(struct usb_fifo *f) |
---|
2024 | { |
---|
2025 | struct usb_mbuf *m; |
---|
2026 | usb_size_t len; |
---|
2027 | |
---|
2028 | USB_IF_POLL(&f->free_q, m); |
---|
2029 | |
---|
2030 | if (m) { |
---|
2031 | len = m->max_data_len; |
---|
2032 | } else { |
---|
2033 | len = 0; |
---|
2034 | } |
---|
2035 | return (len); |
---|
2036 | } |
---|
2037 | |
---|
2038 | /*------------------------------------------------------------------------* |
---|
2039 | * usb_fifo_put_data |
---|
2040 | * |
---|
2041 | * what: |
---|
2042 | * 0 - normal operation |
---|
2043 | * 1 - set last packet flag to enforce framing |
---|
2044 | *------------------------------------------------------------------------*/ |
---|
2045 | void |
---|
2046 | usb_fifo_put_data(struct usb_fifo *f, struct usb_page_cache *pc, |
---|
2047 | usb_frlength_t offset, usb_frlength_t len, uint8_t what) |
---|
2048 | { |
---|
2049 | struct usb_mbuf *m; |
---|
2050 | usb_frlength_t io_len; |
---|
2051 | |
---|
2052 | while (len || (what == 1)) { |
---|
2053 | |
---|
2054 | USB_IF_DEQUEUE(&f->free_q, m); |
---|
2055 | |
---|
2056 | if (m) { |
---|
2057 | USB_MBUF_RESET(m); |
---|
2058 | |
---|
2059 | io_len = MIN(len, m->cur_data_len); |
---|
2060 | |
---|
2061 | usbd_copy_out(pc, offset, m->cur_data_ptr, io_len); |
---|
2062 | |
---|
2063 | m->cur_data_len = io_len; |
---|
2064 | offset += io_len; |
---|
2065 | len -= io_len; |
---|
2066 | |
---|
2067 | if ((len == 0) && (what == 1)) { |
---|
2068 | m->last_packet = 1; |
---|
2069 | } |
---|
2070 | USB_IF_ENQUEUE(&f->used_q, m); |
---|
2071 | |
---|
2072 | usb_fifo_wakeup(f); |
---|
2073 | |
---|
2074 | if ((len == 0) || (what == 1)) { |
---|
2075 | break; |
---|
2076 | } |
---|
2077 | } else { |
---|
2078 | break; |
---|
2079 | } |
---|
2080 | } |
---|
2081 | } |
---|
2082 | |
---|
2083 | void |
---|
2084 | usb_fifo_put_data_linear(struct usb_fifo *f, void *ptr, |
---|
2085 | usb_size_t len, uint8_t what) |
---|
2086 | { |
---|
2087 | struct usb_mbuf *m; |
---|
2088 | usb_size_t io_len; |
---|
2089 | |
---|
2090 | while (len || (what == 1)) { |
---|
2091 | |
---|
2092 | USB_IF_DEQUEUE(&f->free_q, m); |
---|
2093 | |
---|
2094 | if (m) { |
---|
2095 | USB_MBUF_RESET(m); |
---|
2096 | |
---|
2097 | io_len = MIN(len, m->cur_data_len); |
---|
2098 | |
---|
2099 | memcpy(m->cur_data_ptr, ptr, io_len); |
---|
2100 | |
---|
2101 | m->cur_data_len = io_len; |
---|
2102 | ptr = USB_ADD_BYTES(ptr, io_len); |
---|
2103 | len -= io_len; |
---|
2104 | |
---|
2105 | if ((len == 0) && (what == 1)) { |
---|
2106 | m->last_packet = 1; |
---|
2107 | } |
---|
2108 | USB_IF_ENQUEUE(&f->used_q, m); |
---|
2109 | |
---|
2110 | usb_fifo_wakeup(f); |
---|
2111 | |
---|
2112 | if ((len == 0) || (what == 1)) { |
---|
2113 | break; |
---|
2114 | } |
---|
2115 | } else { |
---|
2116 | break; |
---|
2117 | } |
---|
2118 | } |
---|
2119 | } |
---|
2120 | |
---|
2121 | uint8_t |
---|
2122 | usb_fifo_put_data_buffer(struct usb_fifo *f, void *ptr, usb_size_t len) |
---|
2123 | { |
---|
2124 | struct usb_mbuf *m; |
---|
2125 | |
---|
2126 | USB_IF_DEQUEUE(&f->free_q, m); |
---|
2127 | |
---|
2128 | if (m) { |
---|
2129 | m->cur_data_len = len; |
---|
2130 | m->cur_data_ptr = ptr; |
---|
2131 | USB_IF_ENQUEUE(&f->used_q, m); |
---|
2132 | usb_fifo_wakeup(f); |
---|
2133 | return (1); |
---|
2134 | } |
---|
2135 | return (0); |
---|
2136 | } |
---|
2137 | |
---|
2138 | void |
---|
2139 | usb_fifo_put_data_error(struct usb_fifo *f) |
---|
2140 | { |
---|
2141 | f->flag_iserror = 1; |
---|
2142 | usb_fifo_wakeup(f); |
---|
2143 | } |
---|
2144 | |
---|
2145 | /*------------------------------------------------------------------------* |
---|
2146 | * usb_fifo_get_data |
---|
2147 | * |
---|
2148 | * what: |
---|
2149 | * 0 - normal operation |
---|
2150 | * 1 - only get one "usb_mbuf" |
---|
2151 | * |
---|
2152 | * returns: |
---|
2153 | * 0 - no more data |
---|
2154 | * 1 - data in buffer |
---|
2155 | *------------------------------------------------------------------------*/ |
---|
2156 | uint8_t |
---|
2157 | usb_fifo_get_data(struct usb_fifo *f, struct usb_page_cache *pc, |
---|
2158 | usb_frlength_t offset, usb_frlength_t len, usb_frlength_t *actlen, |
---|
2159 | uint8_t what) |
---|
2160 | { |
---|
2161 | struct usb_mbuf *m; |
---|
2162 | usb_frlength_t io_len; |
---|
2163 | uint8_t tr_data = 0; |
---|
2164 | |
---|
2165 | actlen[0] = 0; |
---|
2166 | |
---|
2167 | while (1) { |
---|
2168 | |
---|
2169 | USB_IF_DEQUEUE(&f->used_q, m); |
---|
2170 | |
---|
2171 | if (m) { |
---|
2172 | |
---|
2173 | tr_data = 1; |
---|
2174 | |
---|
2175 | io_len = MIN(len, m->cur_data_len); |
---|
2176 | |
---|
2177 | usbd_copy_in(pc, offset, m->cur_data_ptr, io_len); |
---|
2178 | |
---|
2179 | len -= io_len; |
---|
2180 | offset += io_len; |
---|
2181 | actlen[0] += io_len; |
---|
2182 | m->cur_data_ptr += io_len; |
---|
2183 | m->cur_data_len -= io_len; |
---|
2184 | |
---|
2185 | if ((m->cur_data_len == 0) || (what == 1)) { |
---|
2186 | USB_IF_ENQUEUE(&f->free_q, m); |
---|
2187 | |
---|
2188 | usb_fifo_wakeup(f); |
---|
2189 | |
---|
2190 | if (what == 1) { |
---|
2191 | break; |
---|
2192 | } |
---|
2193 | } else { |
---|
2194 | USB_IF_PREPEND(&f->used_q, m); |
---|
2195 | } |
---|
2196 | } else { |
---|
2197 | |
---|
2198 | if (tr_data) { |
---|
2199 | /* wait for data to be written out */ |
---|
2200 | break; |
---|
2201 | } |
---|
2202 | if (f->flag_flushing) { |
---|
2203 | /* check if we should send a short packet */ |
---|
2204 | if (f->flag_short != 0) { |
---|
2205 | f->flag_short = 0; |
---|
2206 | tr_data = 1; |
---|
2207 | break; |
---|
2208 | } |
---|
2209 | /* flushing complete */ |
---|
2210 | f->flag_flushing = 0; |
---|
2211 | usb_fifo_wakeup(f); |
---|
2212 | } |
---|
2213 | break; |
---|
2214 | } |
---|
2215 | if (len == 0) { |
---|
2216 | break; |
---|
2217 | } |
---|
2218 | } |
---|
2219 | return (tr_data); |
---|
2220 | } |
---|
2221 | |
---|
2222 | uint8_t |
---|
2223 | usb_fifo_get_data_linear(struct usb_fifo *f, void *ptr, |
---|
2224 | usb_size_t len, usb_size_t *actlen, uint8_t what) |
---|
2225 | { |
---|
2226 | struct usb_mbuf *m; |
---|
2227 | usb_size_t io_len; |
---|
2228 | uint8_t tr_data = 0; |
---|
2229 | |
---|
2230 | actlen[0] = 0; |
---|
2231 | |
---|
2232 | while (1) { |
---|
2233 | |
---|
2234 | USB_IF_DEQUEUE(&f->used_q, m); |
---|
2235 | |
---|
2236 | if (m) { |
---|
2237 | |
---|
2238 | tr_data = 1; |
---|
2239 | |
---|
2240 | io_len = MIN(len, m->cur_data_len); |
---|
2241 | |
---|
2242 | memcpy(ptr, m->cur_data_ptr, io_len); |
---|
2243 | |
---|
2244 | len -= io_len; |
---|
2245 | ptr = USB_ADD_BYTES(ptr, io_len); |
---|
2246 | actlen[0] += io_len; |
---|
2247 | m->cur_data_ptr += io_len; |
---|
2248 | m->cur_data_len -= io_len; |
---|
2249 | |
---|
2250 | if ((m->cur_data_len == 0) || (what == 1)) { |
---|
2251 | USB_IF_ENQUEUE(&f->free_q, m); |
---|
2252 | |
---|
2253 | usb_fifo_wakeup(f); |
---|
2254 | |
---|
2255 | if (what == 1) { |
---|
2256 | break; |
---|
2257 | } |
---|
2258 | } else { |
---|
2259 | USB_IF_PREPEND(&f->used_q, m); |
---|
2260 | } |
---|
2261 | } else { |
---|
2262 | |
---|
2263 | if (tr_data) { |
---|
2264 | /* wait for data to be written out */ |
---|
2265 | break; |
---|
2266 | } |
---|
2267 | if (f->flag_flushing) { |
---|
2268 | /* check if we should send a short packet */ |
---|
2269 | if (f->flag_short != 0) { |
---|
2270 | f->flag_short = 0; |
---|
2271 | tr_data = 1; |
---|
2272 | break; |
---|
2273 | } |
---|
2274 | /* flushing complete */ |
---|
2275 | f->flag_flushing = 0; |
---|
2276 | usb_fifo_wakeup(f); |
---|
2277 | } |
---|
2278 | break; |
---|
2279 | } |
---|
2280 | if (len == 0) { |
---|
2281 | break; |
---|
2282 | } |
---|
2283 | } |
---|
2284 | return (tr_data); |
---|
2285 | } |
---|
2286 | |
---|
2287 | uint8_t |
---|
2288 | usb_fifo_get_data_buffer(struct usb_fifo *f, void **pptr, usb_size_t *plen) |
---|
2289 | { |
---|
2290 | struct usb_mbuf *m; |
---|
2291 | |
---|
2292 | USB_IF_POLL(&f->used_q, m); |
---|
2293 | |
---|
2294 | if (m) { |
---|
2295 | *plen = m->cur_data_len; |
---|
2296 | *pptr = m->cur_data_ptr; |
---|
2297 | |
---|
2298 | return (1); |
---|
2299 | } |
---|
2300 | return (0); |
---|
2301 | } |
---|
2302 | |
---|
2303 | void |
---|
2304 | usb_fifo_get_data_error(struct usb_fifo *f) |
---|
2305 | { |
---|
2306 | f->flag_iserror = 1; |
---|
2307 | usb_fifo_wakeup(f); |
---|
2308 | } |
---|
2309 | |
---|
2310 | /*------------------------------------------------------------------------* |
---|
2311 | * usb_alloc_symlink |
---|
2312 | * |
---|
2313 | * Return values: |
---|
2314 | * NULL: Failure |
---|
2315 | * Else: Pointer to symlink entry |
---|
2316 | *------------------------------------------------------------------------*/ |
---|
2317 | struct usb_symlink * |
---|
2318 | usb_alloc_symlink(const char *target) |
---|
2319 | { |
---|
2320 | struct usb_symlink *ps; |
---|
2321 | |
---|
2322 | ps = malloc(sizeof(*ps), M_USBDEV, M_WAITOK); |
---|
2323 | if (ps == NULL) { |
---|
2324 | return (ps); |
---|
2325 | } |
---|
2326 | /* XXX no longer needed */ |
---|
2327 | strlcpy(ps->src_path, target, sizeof(ps->src_path)); |
---|
2328 | ps->src_len = strlen(ps->src_path); |
---|
2329 | strlcpy(ps->dst_path, target, sizeof(ps->dst_path)); |
---|
2330 | ps->dst_len = strlen(ps->dst_path); |
---|
2331 | |
---|
2332 | sx_xlock(&usb_sym_lock); |
---|
2333 | TAILQ_INSERT_TAIL(&usb_sym_head, ps, sym_entry); |
---|
2334 | sx_unlock(&usb_sym_lock); |
---|
2335 | return (ps); |
---|
2336 | } |
---|
2337 | |
---|
2338 | /*------------------------------------------------------------------------* |
---|
2339 | * usb_free_symlink |
---|
2340 | *------------------------------------------------------------------------*/ |
---|
2341 | void |
---|
2342 | usb_free_symlink(struct usb_symlink *ps) |
---|
2343 | { |
---|
2344 | if (ps == NULL) { |
---|
2345 | return; |
---|
2346 | } |
---|
2347 | sx_xlock(&usb_sym_lock); |
---|
2348 | TAILQ_REMOVE(&usb_sym_head, ps, sym_entry); |
---|
2349 | sx_unlock(&usb_sym_lock); |
---|
2350 | |
---|
2351 | free(ps, M_USBDEV); |
---|
2352 | } |
---|
2353 | |
---|
2354 | /*------------------------------------------------------------------------* |
---|
2355 | * usb_read_symlink |
---|
2356 | * |
---|
2357 | * Return value: |
---|
2358 | * 0: Success |
---|
2359 | * Else: Failure |
---|
2360 | *------------------------------------------------------------------------*/ |
---|
2361 | int |
---|
2362 | usb_read_symlink(uint8_t *user_ptr, uint32_t startentry, uint32_t user_len) |
---|
2363 | { |
---|
2364 | struct usb_symlink *ps; |
---|
2365 | uint32_t temp; |
---|
2366 | uint32_t delta = 0; |
---|
2367 | uint8_t len; |
---|
2368 | int error = 0; |
---|
2369 | |
---|
2370 | sx_xlock(&usb_sym_lock); |
---|
2371 | |
---|
2372 | TAILQ_FOREACH(ps, &usb_sym_head, sym_entry) { |
---|
2373 | |
---|
2374 | /* |
---|
2375 | * Compute total length of source and destination symlink |
---|
2376 | * strings pluss one length byte and two NUL bytes: |
---|
2377 | */ |
---|
2378 | temp = ps->src_len + ps->dst_len + 3; |
---|
2379 | |
---|
2380 | if (temp > 255) { |
---|
2381 | /* |
---|
2382 | * Skip entry because this length cannot fit |
---|
2383 | * into one byte: |
---|
2384 | */ |
---|
2385 | continue; |
---|
2386 | } |
---|
2387 | if (startentry != 0) { |
---|
2388 | /* decrement read offset */ |
---|
2389 | startentry--; |
---|
2390 | continue; |
---|
2391 | } |
---|
2392 | if (temp > user_len) { |
---|
2393 | /* out of buffer space */ |
---|
2394 | break; |
---|
2395 | } |
---|
2396 | len = temp; |
---|
2397 | |
---|
2398 | /* copy out total length */ |
---|
2399 | |
---|
2400 | error = copyout(&len, |
---|
2401 | USB_ADD_BYTES(user_ptr, delta), 1); |
---|
2402 | if (error) { |
---|
2403 | break; |
---|
2404 | } |
---|
2405 | delta += 1; |
---|
2406 | |
---|
2407 | /* copy out source string */ |
---|
2408 | |
---|
2409 | error = copyout(ps->src_path, |
---|
2410 | USB_ADD_BYTES(user_ptr, delta), ps->src_len); |
---|
2411 | if (error) { |
---|
2412 | break; |
---|
2413 | } |
---|
2414 | len = 0; |
---|
2415 | delta += ps->src_len; |
---|
2416 | error = copyout(&len, |
---|
2417 | USB_ADD_BYTES(user_ptr, delta), 1); |
---|
2418 | if (error) { |
---|
2419 | break; |
---|
2420 | } |
---|
2421 | delta += 1; |
---|
2422 | |
---|
2423 | /* copy out destination string */ |
---|
2424 | |
---|
2425 | error = copyout(ps->dst_path, |
---|
2426 | USB_ADD_BYTES(user_ptr, delta), ps->dst_len); |
---|
2427 | if (error) { |
---|
2428 | break; |
---|
2429 | } |
---|
2430 | len = 0; |
---|
2431 | delta += ps->dst_len; |
---|
2432 | error = copyout(&len, |
---|
2433 | USB_ADD_BYTES(user_ptr, delta), 1); |
---|
2434 | if (error) { |
---|
2435 | break; |
---|
2436 | } |
---|
2437 | delta += 1; |
---|
2438 | |
---|
2439 | user_len -= temp; |
---|
2440 | } |
---|
2441 | |
---|
2442 | /* a zero length entry indicates the end */ |
---|
2443 | |
---|
2444 | if ((user_len != 0) && (error == 0)) { |
---|
2445 | |
---|
2446 | len = 0; |
---|
2447 | |
---|
2448 | error = copyout(&len, |
---|
2449 | USB_ADD_BYTES(user_ptr, delta), 1); |
---|
2450 | } |
---|
2451 | sx_unlock(&usb_sym_lock); |
---|
2452 | return (error); |
---|
2453 | } |
---|
2454 | |
---|
2455 | void |
---|
2456 | usb_fifo_set_close_zlp(struct usb_fifo *f, uint8_t onoff) |
---|
2457 | { |
---|
2458 | if (f == NULL) |
---|
2459 | return; |
---|
2460 | |
---|
2461 | /* send a Zero Length Packet, ZLP, before close */ |
---|
2462 | f->flag_short = onoff; |
---|
2463 | } |
---|
2464 | |
---|
2465 | void |
---|
2466 | usb_fifo_set_write_defrag(struct usb_fifo *f, uint8_t onoff) |
---|
2467 | { |
---|
2468 | if (f == NULL) |
---|
2469 | return; |
---|
2470 | |
---|
2471 | /* defrag written data */ |
---|
2472 | f->flag_write_defrag = onoff; |
---|
2473 | /* reset defrag state */ |
---|
2474 | f->flag_have_fragment = 0; |
---|
2475 | } |
---|
2476 | |
---|
2477 | void * |
---|
2478 | usb_fifo_softc(struct usb_fifo *f) |
---|
2479 | { |
---|
2480 | return (f->priv_sc0); |
---|
2481 | } |
---|
2482 | #endif /* USB_HAVE_UGEN */ |
---|