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) 2009 Andrew Thompson (thompsa@FreeBSD.org) |
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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 | #include <sys/cdefs.h> |
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30 | __FBSDID("$FreeBSD$"); |
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31 | |
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32 | #include <rtems/bsd/sys/param.h> |
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33 | #include <sys/systm.h> |
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34 | #include <sys/bus.h> |
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35 | #include <sys/condvar.h> |
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36 | #include <sys/kernel.h> |
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37 | #include <rtems/bsd/sys/lock.h> |
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38 | #include <sys/malloc.h> |
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39 | #include <sys/mbuf.h> |
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40 | #include <sys/module.h> |
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41 | #include <sys/mutex.h> |
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42 | #include <sys/socket.h> |
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43 | #include <sys/sockio.h> |
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44 | #include <sys/sysctl.h> |
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45 | #include <sys/sx.h> |
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46 | |
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47 | #include <net/if.h> |
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48 | #include <net/if_var.h> |
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49 | #include <net/ethernet.h> |
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50 | #include <net/if_types.h> |
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51 | #include <net/if_media.h> |
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52 | #include <net/if_vlan_var.h> |
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53 | |
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54 | #include <dev/mii/mii.h> |
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55 | #include <dev/mii/miivar.h> |
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56 | |
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57 | #include <dev/usb/usb.h> |
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58 | #include <dev/usb/usbdi.h> |
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59 | |
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60 | #include <dev/usb/usb_process.h> |
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61 | #include <dev/usb/net/usb_ethernet.h> |
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62 | |
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63 | static SYSCTL_NODE(_net, OID_AUTO, ue, CTLFLAG_RD, 0, |
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64 | "USB Ethernet parameters"); |
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65 | |
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66 | #define UE_LOCK(_ue) mtx_lock((_ue)->ue_mtx) |
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67 | #define UE_UNLOCK(_ue) mtx_unlock((_ue)->ue_mtx) |
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68 | #define UE_LOCK_ASSERT(_ue, t) mtx_assert((_ue)->ue_mtx, t) |
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69 | |
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70 | MODULE_DEPEND(uether, usb, 1, 1, 1); |
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71 | MODULE_DEPEND(uether, miibus, 1, 1, 1); |
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72 | |
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73 | static struct unrhdr *ueunit; |
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74 | |
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75 | static usb_proc_callback_t ue_attach_post_task; |
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76 | static usb_proc_callback_t ue_promisc_task; |
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77 | static usb_proc_callback_t ue_setmulti_task; |
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78 | static usb_proc_callback_t ue_ifmedia_task; |
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79 | static usb_proc_callback_t ue_tick_task; |
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80 | static usb_proc_callback_t ue_start_task; |
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81 | static usb_proc_callback_t ue_stop_task; |
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82 | |
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83 | static void ue_init(void *); |
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84 | static void ue_start(struct ifnet *); |
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85 | static int ue_ifmedia_upd(struct ifnet *); |
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86 | static void ue_watchdog(void *); |
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87 | |
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88 | /* |
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89 | * Return values: |
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90 | * 0: success |
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91 | * Else: device has been detached |
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92 | */ |
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93 | uint8_t |
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94 | uether_pause(struct usb_ether *ue, unsigned int _ticks) |
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95 | { |
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96 | if (usb_proc_is_gone(&ue->ue_tq)) { |
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97 | /* nothing to do */ |
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98 | return (1); |
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99 | } |
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100 | usb_pause_mtx(ue->ue_mtx, _ticks); |
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101 | return (0); |
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102 | } |
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103 | |
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104 | static void |
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105 | ue_queue_command(struct usb_ether *ue, |
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106 | usb_proc_callback_t *fn, |
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107 | struct usb_proc_msg *t0, struct usb_proc_msg *t1) |
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108 | { |
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109 | struct usb_ether_cfg_task *task; |
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110 | |
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111 | UE_LOCK_ASSERT(ue, MA_OWNED); |
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112 | |
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113 | if (usb_proc_is_gone(&ue->ue_tq)) { |
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114 | return; /* nothing to do */ |
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115 | } |
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116 | /* |
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117 | * NOTE: The task cannot get executed before we drop the |
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118 | * "sc_mtx" mutex. It is safe to update fields in the message |
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119 | * structure after that the message got queued. |
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120 | */ |
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121 | task = (struct usb_ether_cfg_task *) |
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122 | usb_proc_msignal(&ue->ue_tq, t0, t1); |
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123 | |
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124 | /* Setup callback and self pointers */ |
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125 | task->hdr.pm_callback = fn; |
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126 | task->ue = ue; |
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127 | |
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128 | /* |
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129 | * Start and stop must be synchronous! |
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130 | */ |
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131 | if ((fn == ue_start_task) || (fn == ue_stop_task)) |
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132 | usb_proc_mwait(&ue->ue_tq, t0, t1); |
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133 | } |
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134 | |
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135 | struct ifnet * |
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136 | uether_getifp(struct usb_ether *ue) |
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137 | { |
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138 | return (ue->ue_ifp); |
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139 | } |
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140 | |
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141 | struct mii_data * |
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142 | uether_getmii(struct usb_ether *ue) |
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143 | { |
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144 | return (device_get_softc(ue->ue_miibus)); |
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145 | } |
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146 | |
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147 | void * |
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148 | uether_getsc(struct usb_ether *ue) |
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149 | { |
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150 | return (ue->ue_sc); |
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151 | } |
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152 | |
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153 | static int |
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154 | ue_sysctl_parent(SYSCTL_HANDLER_ARGS) |
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155 | { |
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156 | struct usb_ether *ue = arg1; |
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157 | const char *name; |
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158 | |
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159 | name = device_get_nameunit(ue->ue_dev); |
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160 | return SYSCTL_OUT_STR(req, name); |
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161 | } |
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162 | |
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163 | int |
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164 | uether_ifattach(struct usb_ether *ue) |
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165 | { |
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166 | int error; |
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167 | |
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168 | /* check some critical parameters */ |
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169 | if ((ue->ue_dev == NULL) || |
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170 | (ue->ue_udev == NULL) || |
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171 | (ue->ue_mtx == NULL) || |
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172 | (ue->ue_methods == NULL)) |
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173 | return (EINVAL); |
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174 | |
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175 | error = usb_proc_create(&ue->ue_tq, ue->ue_mtx, |
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176 | device_get_nameunit(ue->ue_dev), USB_PRI_MED); |
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177 | if (error) { |
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178 | device_printf(ue->ue_dev, "could not setup taskqueue\n"); |
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179 | goto error; |
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180 | } |
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181 | |
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182 | /* fork rest of the attach code */ |
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183 | UE_LOCK(ue); |
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184 | ue_queue_command(ue, ue_attach_post_task, |
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185 | &ue->ue_sync_task[0].hdr, |
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186 | &ue->ue_sync_task[1].hdr); |
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187 | UE_UNLOCK(ue); |
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188 | |
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189 | error: |
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190 | return (error); |
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191 | } |
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192 | |
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193 | static void |
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194 | ue_attach_post_task(struct usb_proc_msg *_task) |
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195 | { |
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196 | struct usb_ether_cfg_task *task = |
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197 | (struct usb_ether_cfg_task *)_task; |
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198 | struct usb_ether *ue = task->ue; |
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199 | struct ifnet *ifp; |
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200 | int error; |
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201 | char num[14]; /* sufficient for 32 bits */ |
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202 | |
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203 | /* first call driver's post attach routine */ |
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204 | ue->ue_methods->ue_attach_post(ue); |
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205 | |
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206 | UE_UNLOCK(ue); |
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207 | |
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208 | ue->ue_unit = alloc_unr(ueunit); |
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209 | usb_callout_init_mtx(&ue->ue_watchdog, ue->ue_mtx, 0); |
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210 | sysctl_ctx_init(&ue->ue_sysctl_ctx); |
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211 | |
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212 | error = 0; |
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213 | CURVNET_SET_QUIET(vnet0); |
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214 | ifp = if_alloc(IFT_ETHER); |
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215 | if (ifp == NULL) { |
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216 | device_printf(ue->ue_dev, "could not allocate ifnet\n"); |
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217 | goto fail; |
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218 | } |
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219 | |
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220 | ifp->if_softc = ue; |
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221 | if_initname(ifp, "ue", ue->ue_unit); |
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222 | if (ue->ue_methods->ue_attach_post_sub != NULL) { |
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223 | ue->ue_ifp = ifp; |
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224 | error = ue->ue_methods->ue_attach_post_sub(ue); |
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225 | } else { |
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226 | ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; |
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227 | if (ue->ue_methods->ue_ioctl != NULL) |
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228 | ifp->if_ioctl = ue->ue_methods->ue_ioctl; |
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229 | else |
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230 | ifp->if_ioctl = uether_ioctl; |
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231 | ifp->if_start = ue_start; |
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232 | ifp->if_init = ue_init; |
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233 | IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen); |
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234 | ifp->if_snd.ifq_drv_maxlen = ifqmaxlen; |
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235 | IFQ_SET_READY(&ifp->if_snd); |
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236 | ue->ue_ifp = ifp; |
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237 | |
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238 | if (ue->ue_methods->ue_mii_upd != NULL && |
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239 | ue->ue_methods->ue_mii_sts != NULL) { |
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240 | /* device_xxx() depends on this */ |
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241 | mtx_lock(&Giant); |
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242 | error = mii_attach(ue->ue_dev, &ue->ue_miibus, ifp, |
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243 | ue_ifmedia_upd, ue->ue_methods->ue_mii_sts, |
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244 | BMSR_DEFCAPMASK, MII_PHY_ANY, MII_OFFSET_ANY, 0); |
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245 | mtx_unlock(&Giant); |
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246 | } |
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247 | } |
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248 | |
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249 | if (error) { |
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250 | device_printf(ue->ue_dev, "attaching PHYs failed\n"); |
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251 | goto fail; |
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252 | } |
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253 | |
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254 | if_printf(ifp, "<USB Ethernet> on %s\n", device_get_nameunit(ue->ue_dev)); |
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255 | ether_ifattach(ifp, ue->ue_eaddr); |
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256 | /* Tell upper layer we support VLAN oversized frames. */ |
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257 | if (ifp->if_capabilities & IFCAP_VLAN_MTU) |
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258 | ifp->if_hdrlen = sizeof(struct ether_vlan_header); |
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259 | |
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260 | CURVNET_RESTORE(); |
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261 | |
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262 | snprintf(num, sizeof(num), "%u", ue->ue_unit); |
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263 | ue->ue_sysctl_oid = SYSCTL_ADD_NODE(&ue->ue_sysctl_ctx, |
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264 | &SYSCTL_NODE_CHILDREN(_net, ue), |
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265 | OID_AUTO, num, CTLFLAG_RD, NULL, ""); |
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266 | SYSCTL_ADD_PROC(&ue->ue_sysctl_ctx, |
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267 | SYSCTL_CHILDREN(ue->ue_sysctl_oid), OID_AUTO, |
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268 | "%parent", CTLTYPE_STRING | CTLFLAG_RD, ue, 0, |
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269 | ue_sysctl_parent, "A", "parent device"); |
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270 | |
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271 | UE_LOCK(ue); |
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272 | return; |
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273 | |
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274 | fail: |
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275 | CURVNET_RESTORE(); |
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276 | free_unr(ueunit, ue->ue_unit); |
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277 | if (ue->ue_ifp != NULL) { |
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278 | if_free(ue->ue_ifp); |
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279 | ue->ue_ifp = NULL; |
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280 | } |
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281 | UE_LOCK(ue); |
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282 | return; |
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283 | } |
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284 | |
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285 | void |
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286 | uether_ifdetach(struct usb_ether *ue) |
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287 | { |
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288 | struct ifnet *ifp; |
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289 | |
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290 | /* wait for any post attach or other command to complete */ |
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291 | usb_proc_drain(&ue->ue_tq); |
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292 | |
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293 | /* read "ifnet" pointer after taskqueue drain */ |
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294 | ifp = ue->ue_ifp; |
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295 | |
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296 | if (ifp != NULL) { |
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297 | |
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298 | /* we are not running any more */ |
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299 | UE_LOCK(ue); |
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300 | ifp->if_drv_flags &= ~IFF_DRV_RUNNING; |
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301 | UE_UNLOCK(ue); |
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302 | |
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303 | /* drain any callouts */ |
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304 | usb_callout_drain(&ue->ue_watchdog); |
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305 | |
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306 | /* detach miibus */ |
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307 | if (ue->ue_miibus != NULL) { |
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308 | mtx_lock(&Giant); /* device_xxx() depends on this */ |
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309 | device_delete_child(ue->ue_dev, ue->ue_miibus); |
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310 | mtx_unlock(&Giant); |
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311 | } |
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312 | |
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313 | /* detach ethernet */ |
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314 | ether_ifdetach(ifp); |
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315 | |
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316 | /* free interface instance */ |
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317 | if_free(ifp); |
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318 | |
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319 | /* free sysctl */ |
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320 | sysctl_ctx_free(&ue->ue_sysctl_ctx); |
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321 | |
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322 | /* free unit */ |
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323 | free_unr(ueunit, ue->ue_unit); |
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324 | } |
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325 | |
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326 | /* free taskqueue, if any */ |
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327 | usb_proc_free(&ue->ue_tq); |
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328 | } |
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329 | |
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330 | uint8_t |
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331 | uether_is_gone(struct usb_ether *ue) |
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332 | { |
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333 | return (usb_proc_is_gone(&ue->ue_tq)); |
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334 | } |
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335 | |
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336 | void |
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337 | uether_init(void *arg) |
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338 | { |
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339 | |
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340 | ue_init(arg); |
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341 | } |
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342 | |
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343 | static void |
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344 | ue_init(void *arg) |
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345 | { |
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346 | struct usb_ether *ue = arg; |
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347 | |
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348 | UE_LOCK(ue); |
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349 | ue_queue_command(ue, ue_start_task, |
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350 | &ue->ue_sync_task[0].hdr, |
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351 | &ue->ue_sync_task[1].hdr); |
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352 | UE_UNLOCK(ue); |
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353 | } |
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354 | |
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355 | static void |
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356 | ue_start_task(struct usb_proc_msg *_task) |
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357 | { |
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358 | struct usb_ether_cfg_task *task = |
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359 | (struct usb_ether_cfg_task *)_task; |
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360 | struct usb_ether *ue = task->ue; |
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361 | struct ifnet *ifp = ue->ue_ifp; |
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362 | |
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363 | UE_LOCK_ASSERT(ue, MA_OWNED); |
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364 | |
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365 | ue->ue_methods->ue_init(ue); |
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366 | |
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367 | if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) |
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368 | return; |
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369 | |
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370 | if (ue->ue_methods->ue_tick != NULL) |
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371 | usb_callout_reset(&ue->ue_watchdog, hz, ue_watchdog, ue); |
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372 | } |
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373 | |
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374 | static void |
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375 | ue_stop_task(struct usb_proc_msg *_task) |
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376 | { |
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377 | struct usb_ether_cfg_task *task = |
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378 | (struct usb_ether_cfg_task *)_task; |
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379 | struct usb_ether *ue = task->ue; |
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380 | |
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381 | UE_LOCK_ASSERT(ue, MA_OWNED); |
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382 | |
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383 | usb_callout_stop(&ue->ue_watchdog); |
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384 | |
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385 | ue->ue_methods->ue_stop(ue); |
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386 | } |
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387 | |
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388 | void |
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389 | uether_start(struct ifnet *ifp) |
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390 | { |
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391 | |
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392 | ue_start(ifp); |
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393 | } |
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394 | |
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395 | static void |
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396 | ue_start(struct ifnet *ifp) |
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397 | { |
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398 | struct usb_ether *ue = ifp->if_softc; |
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399 | |
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400 | if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) |
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401 | return; |
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402 | |
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403 | UE_LOCK(ue); |
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404 | ue->ue_methods->ue_start(ue); |
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405 | UE_UNLOCK(ue); |
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406 | } |
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407 | |
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408 | static void |
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409 | ue_promisc_task(struct usb_proc_msg *_task) |
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410 | { |
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411 | struct usb_ether_cfg_task *task = |
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412 | (struct usb_ether_cfg_task *)_task; |
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413 | struct usb_ether *ue = task->ue; |
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414 | |
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415 | ue->ue_methods->ue_setpromisc(ue); |
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416 | } |
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417 | |
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418 | static void |
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419 | ue_setmulti_task(struct usb_proc_msg *_task) |
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420 | { |
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421 | struct usb_ether_cfg_task *task = |
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422 | (struct usb_ether_cfg_task *)_task; |
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423 | struct usb_ether *ue = task->ue; |
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424 | |
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425 | ue->ue_methods->ue_setmulti(ue); |
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426 | } |
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427 | |
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428 | int |
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429 | uether_ifmedia_upd(struct ifnet *ifp) |
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430 | { |
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431 | |
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432 | return (ue_ifmedia_upd(ifp)); |
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433 | } |
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434 | |
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435 | static int |
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436 | ue_ifmedia_upd(struct ifnet *ifp) |
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437 | { |
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438 | struct usb_ether *ue = ifp->if_softc; |
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439 | |
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440 | /* Defer to process context */ |
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441 | UE_LOCK(ue); |
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442 | ue_queue_command(ue, ue_ifmedia_task, |
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443 | &ue->ue_media_task[0].hdr, |
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444 | &ue->ue_media_task[1].hdr); |
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445 | UE_UNLOCK(ue); |
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446 | |
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447 | return (0); |
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448 | } |
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449 | |
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450 | static void |
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451 | ue_ifmedia_task(struct usb_proc_msg *_task) |
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452 | { |
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453 | struct usb_ether_cfg_task *task = |
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454 | (struct usb_ether_cfg_task *)_task; |
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455 | struct usb_ether *ue = task->ue; |
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456 | struct ifnet *ifp = ue->ue_ifp; |
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457 | |
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458 | ue->ue_methods->ue_mii_upd(ifp); |
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459 | } |
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460 | |
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461 | static void |
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462 | ue_watchdog(void *arg) |
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463 | { |
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464 | struct usb_ether *ue = arg; |
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465 | struct ifnet *ifp = ue->ue_ifp; |
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466 | |
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467 | if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) |
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468 | return; |
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469 | |
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470 | ue_queue_command(ue, ue_tick_task, |
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471 | &ue->ue_tick_task[0].hdr, |
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472 | &ue->ue_tick_task[1].hdr); |
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473 | |
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474 | usb_callout_reset(&ue->ue_watchdog, hz, ue_watchdog, ue); |
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475 | } |
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476 | |
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477 | static void |
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478 | ue_tick_task(struct usb_proc_msg *_task) |
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479 | { |
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480 | struct usb_ether_cfg_task *task = |
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481 | (struct usb_ether_cfg_task *)_task; |
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482 | struct usb_ether *ue = task->ue; |
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483 | struct ifnet *ifp = ue->ue_ifp; |
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484 | |
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485 | if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) |
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486 | return; |
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487 | |
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488 | ue->ue_methods->ue_tick(ue); |
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489 | } |
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490 | |
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491 | int |
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492 | uether_ioctl(struct ifnet *ifp, u_long command, caddr_t data) |
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493 | { |
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494 | struct usb_ether *ue = ifp->if_softc; |
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495 | struct ifreq *ifr = (struct ifreq *)data; |
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496 | struct mii_data *mii; |
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497 | int error = 0; |
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498 | |
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499 | switch (command) { |
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500 | case SIOCSIFFLAGS: |
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501 | UE_LOCK(ue); |
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502 | if (ifp->if_flags & IFF_UP) { |
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503 | if (ifp->if_drv_flags & IFF_DRV_RUNNING) |
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504 | ue_queue_command(ue, ue_promisc_task, |
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505 | &ue->ue_promisc_task[0].hdr, |
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506 | &ue->ue_promisc_task[1].hdr); |
---|
507 | else |
---|
508 | ue_queue_command(ue, ue_start_task, |
---|
509 | &ue->ue_sync_task[0].hdr, |
---|
510 | &ue->ue_sync_task[1].hdr); |
---|
511 | } else { |
---|
512 | ue_queue_command(ue, ue_stop_task, |
---|
513 | &ue->ue_sync_task[0].hdr, |
---|
514 | &ue->ue_sync_task[1].hdr); |
---|
515 | } |
---|
516 | UE_UNLOCK(ue); |
---|
517 | break; |
---|
518 | case SIOCADDMULTI: |
---|
519 | case SIOCDELMULTI: |
---|
520 | UE_LOCK(ue); |
---|
521 | ue_queue_command(ue, ue_setmulti_task, |
---|
522 | &ue->ue_multi_task[0].hdr, |
---|
523 | &ue->ue_multi_task[1].hdr); |
---|
524 | UE_UNLOCK(ue); |
---|
525 | break; |
---|
526 | case SIOCGIFMEDIA: |
---|
527 | case SIOCSIFMEDIA: |
---|
528 | if (ue->ue_miibus != NULL) { |
---|
529 | mii = device_get_softc(ue->ue_miibus); |
---|
530 | error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command); |
---|
531 | } else |
---|
532 | error = ether_ioctl(ifp, command, data); |
---|
533 | break; |
---|
534 | default: |
---|
535 | error = ether_ioctl(ifp, command, data); |
---|
536 | break; |
---|
537 | } |
---|
538 | return (error); |
---|
539 | } |
---|
540 | |
---|
541 | static int |
---|
542 | uether_modevent(module_t mod, int type, void *data) |
---|
543 | { |
---|
544 | |
---|
545 | switch (type) { |
---|
546 | case MOD_LOAD: |
---|
547 | ueunit = new_unrhdr(0, INT_MAX, NULL); |
---|
548 | break; |
---|
549 | case MOD_UNLOAD: |
---|
550 | break; |
---|
551 | default: |
---|
552 | return (EOPNOTSUPP); |
---|
553 | } |
---|
554 | return (0); |
---|
555 | } |
---|
556 | static moduledata_t uether_mod = { |
---|
557 | "uether", |
---|
558 | uether_modevent, |
---|
559 | 0 |
---|
560 | }; |
---|
561 | |
---|
562 | struct mbuf * |
---|
563 | uether_newbuf(void) |
---|
564 | { |
---|
565 | struct mbuf *m_new; |
---|
566 | |
---|
567 | m_new = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); |
---|
568 | if (m_new == NULL) |
---|
569 | return (NULL); |
---|
570 | m_new->m_len = m_new->m_pkthdr.len = MCLBYTES; |
---|
571 | |
---|
572 | m_adj(m_new, ETHER_ALIGN); |
---|
573 | return (m_new); |
---|
574 | } |
---|
575 | |
---|
576 | int |
---|
577 | uether_rxmbuf(struct usb_ether *ue, struct mbuf *m, |
---|
578 | unsigned int len) |
---|
579 | { |
---|
580 | struct ifnet *ifp = ue->ue_ifp; |
---|
581 | |
---|
582 | UE_LOCK_ASSERT(ue, MA_OWNED); |
---|
583 | |
---|
584 | /* finalize mbuf */ |
---|
585 | if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1); |
---|
586 | m->m_pkthdr.rcvif = ifp; |
---|
587 | m->m_pkthdr.len = m->m_len = len; |
---|
588 | |
---|
589 | /* enqueue for later when the lock can be released */ |
---|
590 | _IF_ENQUEUE(&ue->ue_rxq, m); |
---|
591 | return (0); |
---|
592 | } |
---|
593 | |
---|
594 | int |
---|
595 | uether_rxbuf(struct usb_ether *ue, struct usb_page_cache *pc, |
---|
596 | unsigned int offset, unsigned int len) |
---|
597 | { |
---|
598 | struct ifnet *ifp = ue->ue_ifp; |
---|
599 | struct mbuf *m; |
---|
600 | |
---|
601 | UE_LOCK_ASSERT(ue, MA_OWNED); |
---|
602 | |
---|
603 | if (len < ETHER_HDR_LEN || len > MCLBYTES - ETHER_ALIGN) |
---|
604 | return (1); |
---|
605 | |
---|
606 | m = uether_newbuf(); |
---|
607 | if (m == NULL) { |
---|
608 | if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1); |
---|
609 | return (ENOMEM); |
---|
610 | } |
---|
611 | |
---|
612 | usbd_copy_out(pc, offset, mtod(m, uint8_t *), len); |
---|
613 | |
---|
614 | /* finalize mbuf */ |
---|
615 | if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1); |
---|
616 | m->m_pkthdr.rcvif = ifp; |
---|
617 | m->m_pkthdr.len = m->m_len = len; |
---|
618 | |
---|
619 | /* enqueue for later when the lock can be released */ |
---|
620 | _IF_ENQUEUE(&ue->ue_rxq, m); |
---|
621 | return (0); |
---|
622 | } |
---|
623 | |
---|
624 | void |
---|
625 | uether_rxflush(struct usb_ether *ue) |
---|
626 | { |
---|
627 | struct ifnet *ifp = ue->ue_ifp; |
---|
628 | struct mbuf *m; |
---|
629 | |
---|
630 | UE_LOCK_ASSERT(ue, MA_OWNED); |
---|
631 | |
---|
632 | for (;;) { |
---|
633 | _IF_DEQUEUE(&ue->ue_rxq, m); |
---|
634 | if (m == NULL) |
---|
635 | break; |
---|
636 | |
---|
637 | /* |
---|
638 | * The USB xfer has been resubmitted so its safe to unlock now. |
---|
639 | */ |
---|
640 | UE_UNLOCK(ue); |
---|
641 | ifp->if_input(ifp, m); |
---|
642 | UE_LOCK(ue); |
---|
643 | } |
---|
644 | } |
---|
645 | |
---|
646 | /* |
---|
647 | * USB net drivers are run by DRIVER_MODULE() thus SI_SUB_DRIVERS, |
---|
648 | * SI_ORDER_MIDDLE. Run uether after that. |
---|
649 | */ |
---|
650 | DECLARE_MODULE(uether, uether_mod, SI_SUB_DRIVERS, SI_ORDER_ANY); |
---|
651 | MODULE_VERSION(uether, 1); |
---|