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annotate packages/io/eth/current/src/net/eth_drv.c @ 581:e2b797ca39b4

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* src/net/eth_drv.c: If driver can't set multi-cast, indicate it's only a warning.
author jlarmour
date Fri, 07 Feb 2003 00:27:08 +0000
parents bd1db6a90df9
children a6926bb063e1
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1 //==========================================================================
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2 //
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3 // src/net/eth_drv.c
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4 //
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5 // Hardware independent ethernet driver
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6 //
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7 //==========================================================================
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8 //####ECOSGPLCOPYRIGHTBEGIN####
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9 // -------------------------------------------
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10 // This file is part of eCos, the Embedded Configurable Operating System.
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11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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1eb79d208648 Fix compile error.
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12 // Copyright (C) 2002 Gary Thomas
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13 //
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14 // eCos is free software; you can redistribute it and/or modify it under
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15 // the terms of the GNU General Public License as published by the Free
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16 // Software Foundation; either version 2 or (at your option) any later version.
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17 //
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18 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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19 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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20 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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21 // for more details.
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22 //
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23 // You should have received a copy of the GNU General Public License along
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24 // with eCos; if not, write to the Free Software Foundation, Inc.,
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25 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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26 //
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27 // As a special exception, if other files instantiate templates or use macros
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28 // or inline functions from this file, or you compile this file and link it
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29 // with other works to produce a work based on this file, this file does not
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30 // by itself cause the resulting work to be covered by the GNU General Public
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31 // License. However the source code for this file must still be made available
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32 // in accordance with section (3) of the GNU General Public License.
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33 //
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34 // This exception does not invalidate any other reasons why a work based on
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35 // this file might be covered by the GNU General Public License.
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36 //
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37 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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38 // at http://sources.redhat.com/ecos/ecos-license/
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39 // -------------------------------------------
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40 //####ECOSGPLCOPYRIGHTEND####
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41 //==========================================================================
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42 //#####DESCRIPTIONBEGIN####
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43 //
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44 // Author(s): gthomas
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45 // Contributors: gthomas
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46 // Date: 2000-01-10
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47 // Purpose: Hardware independent ethernet driver
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48 // Description:
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49 //
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50 //
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51 //####DESCRIPTIONEND####
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52 //
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53 //==========================================================================
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54
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55 // High-level ethernet driver
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56
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57 #include <sys/param.h>
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58 #include <sys/errno.h>
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59 #include <sys/ioctl.h>
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60 #include <sys/mbuf.h>
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61 #include <sys/socket.h>
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62
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63 #include <net/if.h>
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64 #include <net/if_dl.h>
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65 #include <net/if_types.h>
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66 #include <net/netisr.h>
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67
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68 #ifdef INET
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69 #include <netinet/in.h>
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70 #include <netinet/in_systm.h>
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71 #include <netinet/in_var.h>
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72 #include <netinet/ip.h>
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73 #include <netinet/if_ether.h>
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74 #endif
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75
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76 #if NBPFILTER > 0
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77 #include <net/bpf.h>
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78 #include <net/bpfdesc.h>
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79 #endif
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80
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81 #include <cyg/infra/cyg_ass.h>
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82 #include <cyg/hal/drv_api.h>
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83 #include <pkgconf/hal.h>
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84 #include <cyg/hal/hal_if.h>
126
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85 #include <pkgconf/io_eth_drivers.h> // module configury; SIMULATED_FAILURES
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86 #include <pkgconf/net.h> // CYGPKG_NET_FAST_THREAD_TICKLE_DEVS?
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87
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88 #include <cyg/io/eth/eth_drv.h>
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89 #include <cyg/io/eth/netdev.h>
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90
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91 #ifndef min
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92 #define min( _x_, _y_ ) ((_x_) < (_y_) ? (_x_) : (_y_))
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93 #endif
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94
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95 // ------------------------------------------------------------------------
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96 #ifdef CYGPKG_IO_ETH_DRIVERS_SIMULATED_FAILURES
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97
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98 #define noLOG_RANDOM 32 // so you can tell this is really being random
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99 #ifdef LOG_RANDOM
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100 static struct {
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101 unsigned int *which;
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102 unsigned int random;
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103 unsigned int r100;
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104 } random_log[LOG_RANDOM];
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105
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106 static int random_index = 0;
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107 #endif
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108
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109 static unsigned int
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110 randomize( unsigned int *p )
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111 {
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112 unsigned int r100;
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113 HAL_CLOCK_READ( &r100 );
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114 r100 ^= *p;
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115 *p = (r100 * 1103515245) + 12345;
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116 r100 &= 127;
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117 if ( r100 >= 100 ) // spread the overflow around evenly
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118 r100 = 4 * (r100 - 100);
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119 if ( r100 >= 100 ) // and again - (125,126,127=>100,104,108)
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120 r100 = 12 * (r100 - 100); // =>(0,48,96)
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121 #ifdef LOG_RANDOM
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122 random_log[random_index].which = p;
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123 random_log[random_index].random = *p;
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124 random_log[random_index].r100 = r100;
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125 random_index++;
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126 random_index &= (LOG_RANDOM-1);
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127 #endif
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128 return r100;
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129 }
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130
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131 #define SIMULATE_FAIL_SEND 1
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132 #define SIMULATE_FAIL_RECV 2
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133 #define SIMULATE_FAIL_CORRUPT 3
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134
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135 static struct simulated_failure_state {
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136 struct eth_drv_sc *sc;
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137 unsigned int r_tx_fail;
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138 unsigned int r_rx_fail;
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139 unsigned int r_rx_corrupt;
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140 cyg_tick_count_t droptime;
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141 cyg_tick_count_t passtime;
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142 } simulated_failure_states[2] = {{0},{0}};
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143
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144 static int
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145 simulate_fail( struct eth_drv_sc *sc, int which )
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146 {
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147 struct simulated_failure_state *s;
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148
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149 for ( s = &simulated_failure_states[0]; s < &simulated_failure_states[2];
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150 s++ ) {
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151 if ( 0 == s->sc ) {
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152 s->sc = sc;
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153 s->r_tx_fail = (unsigned int)sc;
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154 s->r_rx_fail = (unsigned int)sc ^ 0x01234567;
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155 s->r_rx_corrupt = (unsigned int)sc ^ 0xdeadbeef;
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156 s->droptime = 0;
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157 s->passtime = 0;
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158 }
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159 if ( sc == s->sc )
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160 break;
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161 }
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162 if ( &simulated_failure_states[2] == s ) {
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163 CYG_FAIL( "No free slot in simulated_failure_states[]" );
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164 return 1; // always fail
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165 }
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166
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167 #ifdef CYGPKG_IO_ETH_DRIVERS_SIMULATE_LINE_CUT
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168 // Regardless of the question, we say "yes" during the period of
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169 // unpluggedness...
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170 {
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171 cyg_tick_count_t now = cyg_current_time();
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172 if ( now > s->droptime && 0 == s->passtime ) { // [initial condition]
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173 s->droptime = 0; // go into a passing phase
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174 (void)randomize( &s->r_tx_fail );
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175 (void)randomize( &s->r_rx_fail );
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176 (void)randomize( &s->r_rx_corrupt );
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177 s->passtime = s->r_tx_fail + s->r_rx_fail + s->r_rx_corrupt;
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178 s->passtime &= 0x3fff; // 16k cS is up to 160S, about 2.5 minutes
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179 s->passtime += now;
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180 }
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181 else if ( now > s->passtime && 0 == s->droptime ) {
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182 s->passtime = 0; // go into a dropping phase
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183 (void)randomize( &s->r_tx_fail );
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184 (void)randomize( &s->r_rx_fail );
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185 (void)randomize( &s->r_rx_corrupt );
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186 s->droptime = s->r_tx_fail + s->r_rx_fail + s->r_rx_corrupt;
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187 s->droptime &= 0x0fff; // 4k cS is up to 40S, about 1/2 a minute
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188 s->droptime += now;
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189 }
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190
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191 if ( now < s->droptime )
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192 return 1; // Say "no"
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193 }
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194 #endif
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195
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196 switch ( which ) {
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197 #ifdef CYGPKG_IO_ETH_DRIVERS_SIMULATE_DROP_TX
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198 case SIMULATE_FAIL_SEND: {
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199 unsigned int z = randomize( &s->r_tx_fail );
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200 return z < CYGPKG_IO_ETH_DRIVERS_SIMULATE_DROP_TX;
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201 }
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202 #endif
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203 #ifdef CYGPKG_IO_ETH_DRIVERS_SIMULATE_DROP_RX
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204 case SIMULATE_FAIL_RECV: {
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205 unsigned int z = randomize( &s->r_rx_fail );
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206 return z < CYGPKG_IO_ETH_DRIVERS_SIMULATE_DROP_RX;
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207 }
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208 #endif
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209 #ifdef CYGPKG_IO_ETH_DRIVERS_SIMULATE_CORRUPT_RX
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210 case SIMULATE_FAIL_CORRUPT: {
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211 unsigned int z = randomize( &s->r_rx_corrupt );
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212 return z < CYGPKG_IO_ETH_DRIVERS_SIMULATE_CORRUPT_RX;
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213 }
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214 #endif
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215 default:
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216 // do nothing - for when options above are not enabled.
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217 }
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218 return 0;
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219 }
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220
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221 #define noLOG_CORRUPTION 32 // so you can tell this is really being random
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222 #ifdef LOG_CORRUPTION
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223 static struct {
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224 int len;
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225 int thislen;
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226 int off;
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227 unsigned char xor;
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228 unsigned char idx;
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229 } corruption_log[LOG_CORRUPTION];
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230
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231 static int corruption_index = 0;
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232 #endif
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233
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234 static void
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235 simulate_fail_corrupt_sglist( struct eth_drv_sg *sg_list, int sg_len )
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236 {
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237 unsigned int z, len, i, off;
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238 HAL_CLOCK_READ( &z );
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239 z += simulated_failure_states[0].r_rx_corrupt;
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240 z += simulated_failure_states[1].r_rx_corrupt;
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241
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242 CYG_ASSERT( MAX_ETH_DRV_SG >= sg_len, "sg_len overflow in corrupt" );
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243
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244 for ( i = 0, len = 0; i < sg_len && sg_list[i].buf && sg_list[i].len; i++ )
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245 len =+ sg_list[i].len;
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246
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247 CYG_ASSERT( 1500 >= len, "sg...len > ether MTU" );
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248 if ( 14 >= len ) // normal ether header
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249 return;
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250
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251 off = z & 2047; // next (2^N-1) > MTU
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252 while ( off > len )
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253 off -= len;
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254
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255 for ( i = 0; i < sg_len && sg_list[i].buf && sg_list[i].len; i++ ) {
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256 if ( off < sg_list[i].len ) { // corrupt this one
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257 unsigned char *p = (unsigned char *)sg_list[i].buf;
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258 p[off] ^= (0xff & (z >> 11));
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259 #ifdef LOG_CORRUPTION
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260 corruption_log[corruption_index].len = len;
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261 corruption_log[corruption_index].thislen = sg_list[i].len;
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262 corruption_log[corruption_index].off = off;
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263 corruption_log[corruption_index].xor = (0xff & (z >> 11));
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264 corruption_log[corruption_index].idx = i;
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265 corruption_index++;
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266 corruption_index &= (LOG_CORRUPTION-1);
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267 #endif
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268 return;
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269 }
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270 off -= sg_list[i].len;
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271 }
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272 CYG_FAIL( "Didn't corrupt anything" );
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273 }
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274
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275 #endif // CYGPKG_IO_ETH_DRIVERS_SIMULATED_FAILURES
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276 // ------------------------------------------------------------------------
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277
208
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278 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT
199
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279
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280 #include <cyg/hal/hal_if.h>
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281
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282 // Use with care! Local variable defined!
208
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283 #define START_CONSOLE() \
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284 { /* NEW BLOCK */ \
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285 int _cur_console = \
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286 CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT); \
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287 { \
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288 int i; \
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289 if ( CYGACC_CALL_IF_FLASH_CFG_OP( CYGNUM_CALL_IF_FLASH_CFG_GET, \
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290 "info_console_force", &i, \
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291 CYGNUM_FLASH_CFG_OP_CONFIG_BOOL ) ) { \
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292 if ( i ) { \
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293 if ( CYGACC_CALL_IF_FLASH_CFG_OP( CYGNUM_CALL_IF_FLASH_CFG_GET, \
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294 "info_console_number", &i, \
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295 CYGNUM_FLASH_CFG_OP_CONFIG_INT ) ) { \
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296 /* Then i is the console to force it to: */ \
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297 CYGACC_CALL_IF_SET_CONSOLE_COMM( i ); \
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298 } \
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299 } \
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300 } \
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301 }
199
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302
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303 #define END_CONSOLE() \
208
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304 CYGACC_CALL_IF_SET_CONSOLE_COMM(_cur_console); \
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305 } /* END BLOCK */
199
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306
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307 #else
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308 #define START_CONSOLE()
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309 #define END_CONSOLE()
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310 #endif
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311 // ------------------------------------------------------------------------
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312
208
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313 #ifdef CYGPKG_NET_FREEBSD_STACK
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314 extern char *_ioctl_name(u_long cmd);
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315 typedef void void_fun(void *);
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316 #endif
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317
115
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318 static int eth_drv_ioctl(struct ifnet *, u_long, caddr_t);
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319 static void eth_drv_send(struct ifnet *);
208
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320 static void eth_drv_start(struct eth_drv_sc *sc);
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321
191
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322 #ifdef CYGDBG_IO_ETH_DRIVERS_DEBUG
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323 int cyg_io_eth_net_debug = CYGDBG_IO_ETH_DRIVERS_DEBUG_VERBOSITY;
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324 #endif
115
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325
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326 // Interfaces exported to drivers
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327
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328 static void eth_drv_init(struct eth_drv_sc *sc, unsigned char *enaddr);
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329 static void eth_drv_recv(struct eth_drv_sc *sc, int total_len);
121
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330 static void eth_drv_tx_done(struct eth_drv_sc *sc, CYG_ADDRESS key, int status);
115
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331
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332 struct eth_drv_funs eth_drv_funs = {eth_drv_init, eth_drv_recv, eth_drv_tx_done};
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333
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334 //
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335 // This function is called during system initialization to register a
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336 // network interface with the system.
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337 //
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338 static void
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339 eth_drv_init(struct eth_drv_sc *sc, unsigned char *enaddr)
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340 {
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341 struct ifnet *ifp = &sc->sc_arpcom.ac_if;
208
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342 #ifdef CYGPKG_NET_FREEBSD_STACK
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343 int unit;
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344 char *np, *xp;
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345 #endif
115
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346
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347 // Set up hardware address
149
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348 if (NULL != enaddr)
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349 bcopy(enaddr, &sc->sc_arpcom.ac_enaddr, ETHER_ADDR_LEN);
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350
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351 // Initialize ifnet structure
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352 ifp->if_softc = sc;
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353 ifp->if_start = eth_drv_send;
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354 ifp->if_ioctl = eth_drv_ioctl;
208
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355 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
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356 #ifdef IFF_NOTRAILERS
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357 ifp->if_flags |= IFF_NOTRAILERS;
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358 #endif
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359 #ifdef CYGPKG_NET_FREEBSD_STACK
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360 ifp->if_name = xp = ifp->if_xname;
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361 np = (char *)sc->dev_name;
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362 unit = 0;
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363 while (*np && !((*np >= '0') && (*np <= '9'))) *xp++ = *np++;
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364 if (*np) {
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365 *xp = '\0';
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366 while (*np) {
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367 unit = (unit * 10) + (*np++ - '0');
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368 }
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369 ifp->if_unit = unit;
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370 }
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371 ifp->if_init = (void_fun *)eth_drv_start;
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372 ifp->if_output = ether_output;
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373 #else
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374 bcopy((void *)sc->dev_name, ifp->if_xname, IFNAMSIZ);
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375 #endif
115
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376 sc->state = 0;
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377
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378 // Attach the interface
208
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379 #ifdef CYGPKG_NET_FREEBSD_STACK
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380 ether_ifattach(ifp, 0);
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381 #else
115
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382 if_attach(ifp);
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383 ether_ifattach(ifp);
208
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384 #endif
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385
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386 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_DIAG
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387 // Set up interfaces so debug environment can share this device
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388 {
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389 void *dbg = CYGACC_CALL_IF_DBG_DATA();
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390 if (!dbg) {
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391 CYGACC_CALL_IF_DBG_DATA_SET((void *)sc);
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392 }
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393 }
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394 #endif
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395 }
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396
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397 //
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398 // This [internal] function will be called to stop activity on an interface.
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399 //
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400 static void
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401 eth_drv_stop(struct eth_drv_sc *sc)
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402 {
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403 (sc->funs->stop)(sc);
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404 sc->state &= ~ETH_DRV_STATE_ACTIVE;
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405 }
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406
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407 //
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408 // This [internal] function will be called to start activity on an interface.
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409 //
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410 static void
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411 eth_drv_start(struct eth_drv_sc *sc)
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412 {
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413 struct ifnet *ifp = &sc->sc_arpcom.ac_if;
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414
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415 // Perform any hardware initialization
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416 (sc->funs->start)(sc, (unsigned char *)&sc->sc_arpcom.ac_enaddr, 0);
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417 #ifdef CYGPKG_NET_FREEBSD_STACK
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418 // resend multicast addresses if present
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419 if(ifp->if_multiaddrs.lh_first && ifp->if_ioctl) {
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420 int s = splimp();
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421 ifp->if_ioctl(ifp, SIOCADDMULTI, 0);
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422 splx(s);
c8e3659acd62 Fix from Red Hat: reconfigure multicast addresses if present on startup.
gthomas
parents: 210
diff changeset
423 }
256
1eb79d208648 Fix compile error.
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parents: 251
diff changeset
424 #endif
115
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parents:
diff changeset
425 // Set 'running' flag, and clear output active flag.
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diff changeset
426 ifp->if_flags |= IFF_RUNNING;
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parents:
diff changeset
427 ifp->if_flags &= ~IFF_OACTIVE;
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parents:
diff changeset
428 sc->state |= ETH_DRV_STATE_ACTIVE;
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parents:
diff changeset
429 eth_drv_send(ifp); // Try and start up transmit
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parents:
diff changeset
430 }
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parents:
diff changeset
431
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parents:
diff changeset
432 //
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parents:
diff changeset
433 // This function supports "I/O control" operations on an interface.
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parents:
diff changeset
434 //
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parents:
diff changeset
435 static int
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parents:
diff changeset
436 eth_drv_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
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parents:
diff changeset
437 {
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diff changeset
438 struct eth_drv_sc *sc = ifp->if_softc;
208
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439 #ifndef CYGPKG_NET_FREEBSD_STACK
115
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440 struct ifaddr *ifa = (struct ifaddr *) data;
208
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diff changeset
441 #endif
115
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diff changeset
442 struct ifreq *ifr = (struct ifreq *)data;
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diff changeset
443 int s, error = 0;
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444
208
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diff changeset
445 // DEBUG
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446 #ifdef CYGPKG_NET_FREEBSD_STACK
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447 log(LOG_IOCTL, "%s: cmd: %s, data:\n", __FUNCTION__, _ioctl_name(cmd));
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448 log_dump(LOG_IOCTL, data, 32);
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449 #endif
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450 // DEBUG
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451
115
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452 s = splnet();
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453
208
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diff changeset
454 #ifdef CYGPKG_NET_FREEBSD_STACK
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diff changeset
455 if ((error = ether_ioctl(ifp, cmd, data)) > 0) {
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diff changeset
456 #else
115
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457 if ((error = ether_ioctl(ifp, &sc->sc_arpcom, cmd, data)) > 0) {
208
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diff changeset
458 #endif
115
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459 splx(s);
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diff changeset
460 return error;
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diff changeset
461 }
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462
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diff changeset
463 switch (cmd) {
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464
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465 case SIOCSIFADDR:
208
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diff changeset
466 #ifndef CYGPKG_NET_FREEBSD_STACK // Now in if_ethersubr.c
115
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467 ifp->if_flags |= IFF_UP;
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468
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469 switch (ifa->ifa_addr->sa_family) {
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470 #ifdef INET
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471 case AF_INET:
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472 eth_drv_start(sc);
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473 arp_ifinit(&sc->sc_arpcom, ifa);
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474 break;
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diff changeset
475 #endif
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476 default:
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477 eth_drv_start(sc);
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diff changeset
478 break;
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479 }
208
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480 #endif // CYGPKG_NET_FREEBSD_STACK
115
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481 break;
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diff changeset
482
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diff changeset
483 case SIOCGIFHWADDR:
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484 // Get hardware (MAC) address
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485 ifr->ifr_hwaddr.sa_family = AF_INET;
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486 bcopy(&sc->sc_arpcom.ac_enaddr, &ifr->ifr_hwaddr.sa_data, ETHER_ADDR_LEN);
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487 break;
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488
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489 case SIOCSIFHWADDR:
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490 // Set hardware (MAC) address
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491 bcopy(&ifr->ifr_hwaddr.sa_data, &sc->sc_arpcom.ac_enaddr, ETHER_ADDR_LEN);
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492 if ((sc->funs->control)(sc, ETH_DRV_SET_MAC_ADDRESS,
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493 &sc->sc_arpcom.ac_enaddr, ETHER_ADDR_LEN)) {
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494 error = EINVAL;
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495 }
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496 break;
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497
117
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diff changeset
498 #ifdef SIOCGIFSTATS
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diff changeset
499 case SIOCGIFSTATS:
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diff changeset
500 #ifdef SIOCGIFSTATSUD
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diff changeset
501 case SIOCGIFSTATSUD:
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diff changeset
502 #endif
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diff changeset
503 // Get interface statistics:
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diff changeset
504 if ((sc->funs->control)(sc, (cmd == SIOCGIFSTATS)
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diff changeset
505 ? ETH_DRV_GET_IF_STATS
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diff changeset
506 : ETH_DRV_GET_IF_STATS_UD,
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diff changeset
507 data, 0 ) ) {
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diff changeset
508 error = EINVAL;
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diff changeset
509 }
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diff changeset
510 break;
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diff changeset
511 #endif // SIOCGIFSTATS
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diff changeset
512
115
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513 case SIOCSIFFLAGS:
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514 if ((ifp->if_flags & IFF_UP) == 0 &&
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515 (ifp->if_flags & IFF_RUNNING) != 0) {
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jlarmour
parents:
diff changeset
516 /*
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diff changeset
517 * If interface is marked down and it is running, then
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diff changeset
518 * stop it.
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519 */
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520 eth_drv_stop(sc);
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521 ifp->if_flags &= ~IFF_RUNNING;
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522 } else
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523 if ((ifp->if_flags & IFF_UP) != 0 &&
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524 (ifp->if_flags & IFF_RUNNING) == 0) {
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diff changeset
525 /*
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jlarmour
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diff changeset
526 * If interface is marked up and it is stopped, then
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jlarmour
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diff changeset
527 * start it.
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528 */
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diff changeset
529 eth_drv_start(sc);
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jlarmour
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diff changeset
530 } else {
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diff changeset
531 /*
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jlarmour
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diff changeset
532 * Reset the interface to pick up changes in any other
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jlarmour
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533 * flags that affect hardware registers.
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diff changeset
534 */
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diff changeset
535 eth_drv_stop(sc);
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diff changeset
536 eth_drv_start(sc);
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537 }
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diff changeset
538 break;
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539
208
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diff changeset
540 #ifdef CYGPKG_NET_FREEBSD_STACK
115
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541 case SIOCADDMULTI:
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542 case SIOCDELMULTI:
208
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diff changeset
543 {
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diff changeset
544 struct ifmultiaddr *ifma;
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diff changeset
545 struct eth_drv_mc_list mc_list;
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diff changeset
546 int mode = (ifp->if_flags & IFF_ALLMULTI) ? ETH_DRV_SET_MC_ALL :
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diff changeset
547 ETH_DRV_SET_MC_LIST;
115
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diff changeset
548
208
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diff changeset
549 #ifdef DEBUG
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diff changeset
550 log(LOG_ADDR, "%s Multi\n",(cmd == SIOCADDMULTI) ? "Add" : "Del");
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diff changeset
551 #endif
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diff changeset
552 mc_list.len = 0;
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diff changeset
553 LIST_FOREACH(ifma, &((ifp)->if_multiaddrs), ifma_link) {
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diff changeset
554 if (ifma->ifma_addr->sa_family != AF_LINK) {
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parents: 199
diff changeset
555 continue;
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diff changeset
556 }
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diff changeset
557 #ifdef DEBUG
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diff changeset
558 log_dump(LOG_ADDR, LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 6);
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diff changeset
559 #endif
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diff changeset
560 if ((LLADDR((struct sockaddr_dl *)ifma->ifma_addr)[0] & 0x01) == 0) {
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parents: 199
diff changeset
561 #ifdef DEBUG
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diff changeset
562 log(LOG_ADDR, "** Not a multicast address - ignored\n");
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diff changeset
563 #endif
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diff changeset
564 continue;
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565 }
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diff changeset
566 if (mc_list.len < ETH_DRV_MAX_MC) {
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567 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
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diff changeset
568 mc_list.addrs[mc_list.len], ETHER_ADDR_LEN);
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diff changeset
569 mc_list.len++;
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parents: 199
diff changeset
570 } else {
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diff changeset
571 mode = ETH_DRV_SET_MC_ALL;
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diff changeset
572 }
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573 }
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574 // Note: drivers may behave like IFF_ALLMULTI if the list is
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575 // more than their hardware can handle, e.g. some can only handle 1.
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576 if ((sc->funs->control)(sc, mode, &mc_list, sizeof(mc_list))) {
581
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577 diag_printf( "[%s] Warning: Driver can't set multi-cast mode\n",
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jlarmour
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diff changeset
578 __FUNCTION__ );
208
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diff changeset
579 error = EINVAL;
115
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580 }
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581 break;
208
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582 }
115
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583 #endif
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diff changeset
584
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diff changeset
585 default:
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diff changeset
586 error = EINVAL;
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587 break;
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588 }
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589
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590 splx(s);
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591 return (error);
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592 }
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593
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594 //
179
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595 // Control whether any special locking needs to take place if we intend to
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596 // cooperate with a ROM monitor (e.g. RedBoot) using this hardware.
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597 //
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598 #if defined(CYGSEM_HAL_USE_ROM_MONITOR) && \
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599 defined(CYGSEM_HAL_VIRTUAL_VECTOR_DIAG) && \
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diff changeset
600 !defined(CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_COMMS)
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diff changeset
601
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diff changeset
602 // Indicate that special locking precautions are warranted.
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diff changeset
603 #define _LOCK_WITH_ROM_MONITOR
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diff changeset
604
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diff changeset
605 // This defines the [well known] channel that RedBoot will use when it is
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diff changeset
606 // using the network hardware for the debug channel.
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diff changeset
607 #define RedBoot_TCP_CHANNEL CYGNUM_HAL_VIRTUAL_VECTOR_COMM_CHANNELS
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diff changeset
608
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diff changeset
609 // Define this if you ever need to call 'diag_printf()' from interrupt level
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diff changeset
610 // code (ISR) and the debug channel might be using the network hardware. If
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diff changeset
611 // this is not the case, then disabling interrupts here is over-kill.
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diff changeset
612 //#define _LOCK_USING_INTERRUPTS
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diff changeset
613 #endif
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614
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diff changeset
615 //
115
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616 // This routine is called to start transmitting if there is data
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diff changeset
617 // available.
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618 //
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619 static void
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620 eth_drv_send(struct ifnet *ifp)
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621 {
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622 struct eth_drv_sc *sc = ifp->if_softc;
289
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623 #if MAX_ETH_DRV_SG > 64
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624 static // Avoid large stack requirements
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625 #endif
115
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626 struct eth_drv_sg sg_list[MAX_ETH_DRV_SG];
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627 int sg_len;
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628 struct mbuf *m0, *m;
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629 int len, total_len;
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630 unsigned char *data;
179
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diff changeset
631 #ifdef _LOCK_WITH_ROM_MONITOR
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632 #ifdef _LOCK_USING_INTERRUPTS
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633 cyg_uint32 ints;
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diff changeset
634 #endif
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635 bool need_lock = false;
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diff changeset
636 int debug_chan;
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diff changeset
637 #endif // _LOCK_WITH_ROM_MONITOR
115
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638
121
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639 // This is now only called from network threads, so no guarding is
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640 // required; locking is in place via the splfoo() mechanism already.
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641
115
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642 if ((ifp->if_flags & IFF_RUNNING) != IFF_RUNNING) {
121
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643 return;
115
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644 }
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645
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646 while ((sc->funs->can_send)(sc) > 0) {
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647 IF_DEQUEUE(&ifp->if_snd, m0);
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648 if (m0 == 0) {
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diff changeset
649 break;
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650 }
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651
126
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652 #ifdef CYGPKG_IO_ETH_DRIVERS_SIMULATED_FAILURES
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653 if ( simulate_fail( sc, SIMULATE_FAIL_SEND ) ) {
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654 // must free the mbufs
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655 m_freem(m0);
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656 continue; // next packet to send
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657 }
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658 #endif
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659
191
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diff changeset
660 #ifdef CYGDBG_IO_ETH_DRIVERS_DEBUG
199
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661 if (cyg_io_eth_net_debug) {
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662 START_CONSOLE();
115
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663 diag_printf("Sending %d bytes\n", m0->m_pkthdr.len);
199
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664 END_CONSOLE();
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665 }
191
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666 #endif
115
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667
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668 /* We need to use m->m_pkthdr.len, so require the header */
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669 if ((m0->m_flags & M_PKTHDR) == 0)
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670 panic("eth_drv_send: no header mbuf");
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671
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672 #if NBPFILTER > 0
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673 /* Tap off here if there is a BPF listener. */
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674 if (ifp->if_bpf)
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675 bpf_mtap(ifp->if_bpf, m0);
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676 #endif
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677
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678 // Extract data pointers (don't actually move data here)
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679 sg_len = 0; total_len = 0;
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680 for (m = m0; m ; m = m->m_next) {
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681 data = mtod(m, u_char *);
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682 len = m->m_len;
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683 total_len += len;
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684 sg_list[sg_len].buf = (CYG_ADDRESS)data;
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685 sg_list[sg_len].len = len;
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686 if ( len )
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687 sg_len++;
191
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688 #ifdef CYGDBG_IO_ETH_DRIVERS_DEBUG
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689 if (cyg_io_eth_net_debug) {
199
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690 START_CONSOLE();
115
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691 diag_printf("xmit %d bytes at %x sg[%d]\n", len, data, sg_len);
191
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692 if ( cyg_io_eth_net_debug > 1)
115
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693 diag_dump_buf(data, len);
199
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694 END_CONSOLE();
115
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695 }
191
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696 #endif
115
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697 if ( MAX_ETH_DRV_SG < sg_len ) {
199
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698 #ifdef CYGPKG_IO_ETH_DRIVERS_WARN_NO_MBUFS
289
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diff changeset
699 int needed = 0;
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diff changeset
700 struct mbuf *m1;
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diff changeset
701 for (m1 = m0; m1 ; m1 = m1->m_next) needed++;
199
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diff changeset
702 START_CONSOLE();
289
bd1db6a90df9 Fix problems with overflowing scatter-gather lists.
gthomas
parents: 256
diff changeset
703 diag_printf("too many mbufs to tx, %d > %d, need %d\n",
bd1db6a90df9 Fix problems with overflowing scatter-gather lists.
gthomas
parents: 256
diff changeset
704 sg_len, MAX_ETH_DRV_SG, needed );
199
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parents: 195
diff changeset
705 END_CONSOLE();
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parents: 195
diff changeset
706 #endif
115
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parents:
diff changeset
707 sg_len = 0;
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jlarmour
parents:
diff changeset
708 break; // drop it on the floor
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parents:
diff changeset
709 }
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parents:
diff changeset
710 }
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parents:
diff changeset
711
179
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parents: 177
diff changeset
712 #ifdef _LOCK_WITH_ROM_MONITOR
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parents: 177
diff changeset
713 // Firm lock on this portion of the driver. Since we are about to
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parents: 177
diff changeset
714 // start messing with the actual hardware, it is imperative that the
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parents: 177
diff changeset
715 // current thread not loose control of the CPU at this time. Otherwise,
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parents: 177
diff changeset
716 // the hardware could be left in an unusable state. This caution is
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parents: 177
diff changeset
717 // only warranted if there is a possibility of some other thread trying
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parents: 177
diff changeset
718 // to use the hardware simultaneously. The network stack would prevent
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diff changeset
719 // this implicitly since all accesses are controlled by the "splX()"
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parents: 177
diff changeset
720 // locks, but if there is a ROM monitor, such as RedBoot, also using
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diff changeset
721 // the hardware, all bets are off.
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diff changeset
722
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parents: 177
diff changeset
723 // Note: these operations can be avoided if it were well known that
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parents: 177
diff changeset
724 // RedBoot was not using the network hardware for diagnostic I/O. This
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parents: 177
diff changeset
725 // can be inferred by checking which I/O channel RedBoot is currently
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parents: 177
diff changeset
726 // hooked to.
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parents: 177
diff changeset
727 debug_chan = CYGACC_CALL_IF_SET_DEBUG_COMM(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);
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parents: 177
diff changeset
728 if (debug_chan == RedBoot_TCP_CHANNEL) {
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parents: 177
diff changeset
729 need_lock = true;
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parents: 177
diff changeset
730 #ifdef _LOCK_USING_INTERRUPTS
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parents: 177
diff changeset
731 HAL_DISABLE_INTERRUPTS(ints);
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parents: 177
diff changeset
732 #endif
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parents: 177
diff changeset
733 cyg_drv_dsr_lock();
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parents: 177
diff changeset
734 }
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diff changeset
735 #endif // _LOCK_WITH_ROM_MONITOR
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diff changeset
736
115
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parents:
diff changeset
737 // Tell hardware to send this packet
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parents:
diff changeset
738 if ( sg_len )
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parents:
diff changeset
739 (sc->funs->send)(sc, sg_list, sg_len, total_len, (unsigned long)m0);
179
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diff changeset
740
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parents: 177
diff changeset
741 #ifdef _LOCK_WITH_ROM_MONITOR
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diff changeset
742 // Unlock the driver & hardware. It can once again be safely shared.
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parents: 177
diff changeset
743 if (need_lock) {
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diff changeset
744 cyg_drv_dsr_unlock();
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parents: 177
diff changeset
745 #ifdef _LOCK_USING_INTERRUPTS
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diff changeset
746 HAL_RESTORE_INTERRUPTS(ints);
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diff changeset
747 #endif
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diff changeset
748 }
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diff changeset
749 #endif // _LOCK_WITH_ROM_MONITOR
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diff changeset
750 #undef _LOCK_WITH_ROM_MONITOR
180
2bdd82a025e1 Quick fix for eth driver build problem
jlarmour
parents: 179
diff changeset
751 }
115
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parents:
diff changeset
752 }
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parents:
diff changeset
753
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jlarmour
parents:
diff changeset
754 //
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jlarmour
parents:
diff changeset
755 // This function is called from the hardware driver when an output operation
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parents:
diff changeset
756 // has completed - i.e. the packet has been sent.
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parents:
diff changeset
757 //
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parents:
diff changeset
758 static struct mbuf *mbuf_key;
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diff changeset
759
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diff changeset
760 static void
121
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diff changeset
761 eth_drv_tx_done(struct eth_drv_sc *sc, CYG_ADDRESS key, int status)
115
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parents:
diff changeset
762 {
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diff changeset
763 struct ifnet *ifp = &sc->sc_arpcom.ac_if;
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parents:
diff changeset
764 struct mbuf *m0 = (struct mbuf *)key;
177
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diff changeset
765 CYGARC_HAL_SAVE_GP();
147
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diff changeset
766
115
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parents:
diff changeset
767 // Check for errors here (via 'status')
147
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parents: 145
diff changeset
768 ifp->if_opackets++;
115
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parents:
diff changeset
769 // Done with packet
182
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parents: 180
diff changeset
770
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parents: 180
diff changeset
771 // Guard against a NULL return - can be caused by race conditions in
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parents: 180
diff changeset
772 // the driver, this is the neatest fixup:
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parents: 180
diff changeset
773 if (m0) {
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parents: 180
diff changeset
774 mbuf_key = m0;
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parents: 180
diff changeset
775 m_freem(m0);
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diff changeset
776 }
115
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parents:
diff changeset
777 // Start another if possible
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jlarmour
parents:
diff changeset
778 eth_drv_send(ifp);
177
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parents: 169
diff changeset
779 CYGARC_HAL_RESTORE_GP();
115
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parents:
diff changeset
780 }
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diff changeset
781
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jlarmour
parents:
diff changeset
782 //
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jlarmour
parents:
diff changeset
783 // This function is called from a hardware driver to indicate that an input
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jlarmour
parents:
diff changeset
784 // packet has arrived. The routine will set up appropriate network resources
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parents:
diff changeset
785 // (mbuf's) to hold the data and call back into the driver to retrieve the data.
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parents:
diff changeset
786 //
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parents:
diff changeset
787 static void
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parents:
diff changeset
788 eth_drv_recv(struct eth_drv_sc *sc, int total_len)
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parents:
diff changeset
789 {
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parents:
diff changeset
790 struct ifnet *ifp = &sc->sc_arpcom.ac_if;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
791 struct ether_header _eh, *eh=&_eh;
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jlarmour
parents:
diff changeset
792 struct mbuf *top, **mp, *m;
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
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parents: 199
diff changeset
793 int mlen;
115
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parents:
diff changeset
794 unsigned char *data;
289
bd1db6a90df9 Fix problems with overflowing scatter-gather lists.
gthomas
parents: 256
diff changeset
795 #if MAX_ETH_DRV_SG > 64
bd1db6a90df9 Fix problems with overflowing scatter-gather lists.
gthomas
parents: 256
diff changeset
796 static // Avoid large stack requirements
bd1db6a90df9 Fix problems with overflowing scatter-gather lists.
gthomas
parents: 256
diff changeset
797 #endif
115
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parents:
diff changeset
798 struct eth_drv_sg sg_list[MAX_ETH_DRV_SG];
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parents:
diff changeset
799 int sg_len;
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parents:
diff changeset
800
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diff changeset
801 if ((ifp->if_flags & IFF_RUNNING) != IFF_RUNNING) {
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parents:
diff changeset
802 return; // Interface not up, ignore this request
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diff changeset
803 }
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diff changeset
804
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diff changeset
805 CYG_ASSERT( 0 != total_len, "total_len is zero!" );
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parents:
diff changeset
806 CYG_ASSERT( 0 <= total_len, "total_len is negative!" );
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parents:
diff changeset
807 CYG_ASSERT( sizeof( struct ether_header ) <= total_len,
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diff changeset
808 "No ether header here!" );
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diff changeset
809
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diff changeset
810 if ( total_len < sizeof( struct ether_header ) )
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parents:
diff changeset
811 // Our arithmetic below would go wrong
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parents:
diff changeset
812 return;
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diff changeset
813
177
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diff changeset
814 CYGARC_HAL_SAVE_GP(); // This is down here to make matching restore neat
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parents: 169
diff changeset
815
115
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diff changeset
816 /* Pull packet off interface. */
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diff changeset
817 MGETHDR(m, M_DONTWAIT, MT_DATA);
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parents:
diff changeset
818 if (m == 0) {
130
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diff changeset
819 #ifdef CYGPKG_IO_ETH_DRIVERS_WARN_NO_MBUFS
199
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parents: 195
diff changeset
820 START_CONSOLE();
115
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diff changeset
821 diag_printf("warning: eth_recv out of MBUFs\n");
199
920b9b754b53 Merge from eCos master repository on 2001-12-15-12:00:33-GMT
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diff changeset
822 END_CONSOLE();
130
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diff changeset
823 #endif
115
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diff changeset
824 }
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diff changeset
825
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parents:
diff changeset
826 // Set up buffers
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parents:
diff changeset
827 // Unload ethernet header separately so IP/UDP/TCP headers are aligned
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parents:
diff changeset
828 sg_list[0].buf = (CYG_ADDRESS)eh;
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parents:
diff changeset
829 sg_list[0].len = sizeof(*eh);
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diff changeset
830 sg_len = 1;
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diff changeset
831
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jlarmour
parents:
diff changeset
832 // Compute total length (minus ethernet header)
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jlarmour
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diff changeset
833 total_len -= sizeof(*eh);
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diff changeset
834
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diff changeset
835 top = 0;
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diff changeset
836 mlen = MHLEN;
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diff changeset
837 mp = &top;
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diff changeset
838
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diff changeset
839 if (m) {
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diff changeset
840 m->m_pkthdr.rcvif = ifp;
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diff changeset
841 m->m_pkthdr.len = total_len;
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842 } else {
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diff changeset
843 sg_list[sg_len].buf = (CYG_ADDRESS)0;
169
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diff changeset
844 sg_list[sg_len].len = total_len;
115
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diff changeset
845 sg_len++;
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diff changeset
846 total_len = 0;
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parents:
diff changeset
847 }
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parents:
diff changeset
848
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parents:
diff changeset
849 while (total_len > 0) {
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parents:
diff changeset
850 if (top) {
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jlarmour
parents:
diff changeset
851 MGET(m, M_DONTWAIT, MT_DATA);
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parents:
diff changeset
852 if (m == 0) {
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jlarmour
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diff changeset
853 m_freem(top);
130
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diff changeset
854 #ifdef CYGPKG_IO_ETH_DRIVERS_WARN_NO_MBUFS
199
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diff changeset
855 START_CONSOLE();
130
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diff changeset
856 diag_printf("out of MBUFs [2]");
199
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diff changeset
857 END_CONSOLE();
130
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diff changeset
858 #endif
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diff changeset
859 sg_list[sg_len].buf = (CYG_ADDRESS)0;
169
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diff changeset
860 sg_list[sg_len].len = total_len;
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diff changeset
861 sg_len++;
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diff changeset
862 top = 0;
130
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diff changeset
863 break;
115
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parents:
diff changeset
864 }
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diff changeset
865 mlen = MLEN;
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parents:
diff changeset
866 }
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parents:
diff changeset
867 if (total_len >= MINCLSIZE) {
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jlarmour
parents:
diff changeset
868 MCLGET(m, M_DONTWAIT);
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parents:
diff changeset
869 if ((m->m_flags & M_EXT) == 0) {
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parents:
diff changeset
870 m_freem(top);
160
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diff changeset
871 m_free(m);
130
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diff changeset
872 #ifdef CYGPKG_IO_ETH_DRIVERS_WARN_NO_MBUFS
199
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diff changeset
873 START_CONSOLE();
115
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parents:
diff changeset
874 diag_printf("warning: eth_recv out of MBUFs\n");
199
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diff changeset
875 END_CONSOLE();
130
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diff changeset
876 #endif
115
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parents:
diff changeset
877 sg_list[sg_len].buf = (CYG_ADDRESS)0;
169
11b54a94cf58 Merge from eCos master repository on 2001-07-06-06:43:02-BST
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diff changeset
878 sg_list[sg_len].len = total_len;
115
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parents:
diff changeset
879 sg_len++;
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jlarmour
parents:
diff changeset
880 top = 0;
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parents:
diff changeset
881 break;
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jlarmour
parents:
diff changeset
882 }
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parents:
diff changeset
883 mlen = MCLBYTES;
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parents:
diff changeset
884 }
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jlarmour
parents:
diff changeset
885 m->m_len = mlen = min(total_len, mlen);
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parents:
diff changeset
886 total_len -= mlen;
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jlarmour
parents:
diff changeset
887 data = mtod(m, caddr_t);
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parents:
diff changeset
888 sg_list[sg_len].buf = (CYG_ADDRESS)data;
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jlarmour
parents:
diff changeset
889 sg_list[sg_len].len = mlen;
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jlarmour
parents:
diff changeset
890 sg_len++;
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jlarmour
parents:
diff changeset
891 *mp = m;
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parents:
diff changeset
892 mp = &m->m_next;
160
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parents: 149
diff changeset
893 } // endwhile
115
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parents:
diff changeset
894
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parents:
diff changeset
895 // Ask hardware to unload buffers
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jlarmour
parents:
diff changeset
896 (sc->funs->recv)(sc, sg_list, sg_len);
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parents:
diff changeset
897
126
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diff changeset
898 #ifdef CYGPKG_IO_ETH_DRIVERS_SIMULATED_FAILURES
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
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parents: 199
diff changeset
899 if ( simulate_fail( sc, SIMULATE_FAIL_RECV ) ) {
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diff changeset
900 // toss the packet - note that some hardware gets
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parents: 199
diff changeset
901 // fussy if the packet isn't "unloaded", thus we
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
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diff changeset
902 // have to wait until now to throw it away
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diff changeset
903 if (top) {
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parents: 199
diff changeset
904 m_free(top);
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parents: 199
diff changeset
905 }
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diff changeset
906 ifp->if_ierrors++;
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diff changeset
907 return;
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parents: 199
diff changeset
908 }
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diff changeset
909
126
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diff changeset
910 if ( simulate_fail( sc, SIMULATE_FAIL_CORRUPT ) ) {
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diff changeset
911 // Corrupt the data
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diff changeset
912 simulate_fail_corrupt_sglist( sg_list, sg_len );
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parents: 121
diff changeset
913 }
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diff changeset
914 #endif
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diff changeset
915
191
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diff changeset
916 #ifdef CYGDBG_IO_ETH_DRIVERS_DEBUG
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diff changeset
917 if (cyg_io_eth_net_debug) {
208
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parents: 199
diff changeset
918 int i;
199
920b9b754b53 Merge from eCos master repository on 2001-12-15-12:00:33-GMT
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diff changeset
919 START_CONSOLE();
115
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parents:
diff changeset
920 for (i = 0; i < sg_len; i++) {
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parents:
diff changeset
921 if (sg_list[i].buf) {
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parents:
diff changeset
922 diag_printf("rx %d bytes at %x sg[%d]\n", sg_list[i].len, sg_list[i].buf, i);
191
678094f34118 Merge from eCos master repository on 2001-10-19-06:43:02-BST
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parents: 188
diff changeset
923 if ( cyg_io_eth_net_debug > 1 )
115
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parents:
diff changeset
924 diag_dump_buf((void *)sg_list[i].buf, sg_list[i].len);
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jlarmour
parents:
diff changeset
925 }
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jlarmour
parents:
diff changeset
926 }
199
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diff changeset
927 END_CONSOLE();
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
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parents:
diff changeset
928 }
191
678094f34118 Merge from eCos master repository on 2001-10-19-06:43:02-BST
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parents: 188
diff changeset
929 #endif
115
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parents:
diff changeset
930 m = top;
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jlarmour
parents:
diff changeset
931 if (m == 0) {
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jlarmour
parents:
diff changeset
932 ifp->if_ierrors++;
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parents:
diff changeset
933 }
177
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diff changeset
934 else {
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parents: 169
diff changeset
935 ifp->if_ipackets++;
115
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parents:
diff changeset
936
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parents:
diff changeset
937 #if NBPFILTER > 0
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jlarmour
parents:
diff changeset
938 #error FIXME - Need mbuf with ethernet header attached
177
4c750ce71ae3 Merge from eCos master repository on 2001-08-10-19:22:57-BST
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parents: 169
diff changeset
939 /*
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jlarmour
parents: 169
diff changeset
940 * Check if there's a BPF listener on this interface.
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parents: 169
diff changeset
941 * If so, hand off the raw packet to bpf.
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parents: 169
diff changeset
942 */
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parents: 169
diff changeset
943 if (ifp->if_bpf)
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parents: 169
diff changeset
944 bpf_mtap(ifp->if_bpf, m);
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
945 #endif
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parents:
diff changeset
946
177
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parents: 169
diff changeset
947 // Push data into protocol stacks
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diff changeset
948 ether_input(ifp, eh, m);
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parents: 169
diff changeset
949 }
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diff changeset
950 CYGARC_HAL_RESTORE_GP();
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
951 }
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parents:
diff changeset
952
121
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diff changeset
953
6bd9d475ed4b Merge from eCos master repository on 2000-09-04-20:50:20-BST
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diff changeset
954 // ------------------------------------------------------------------------
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jlarmour
parents: 117
diff changeset
955 // DSR to schedule network delivery thread
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diff changeset
956
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diff changeset
957 extern void ecos_synch_eth_drv_dsr(void); // from ecos/timeout.c in net stack
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diff changeset
958
6bd9d475ed4b Merge from eCos master repository on 2000-09-04-20:50:20-BST
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diff changeset
959 void
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diff changeset
960 eth_drv_dsr(cyg_vector_t vector,
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diff changeset
961 cyg_ucount32 count,
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diff changeset
962 cyg_addrword_t data)
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diff changeset
963 {
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diff changeset
964 struct eth_drv_sc *sc = (struct eth_drv_sc *)data;
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diff changeset
965
184
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diff changeset
966 #ifdef CYGDBG_USE_ASSERTS
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diff changeset
967 // then check that this really is a "sc"
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diff changeset
968 {
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diff changeset
969 cyg_netdevtab_entry_t *t;
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diff changeset
970 for (t = &__NETDEVTAB__[0]; t != &__NETDEVTAB_END__; t++)
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parents: 182
diff changeset
971 if ( ((struct eth_drv_sc *)t->device_instance) == sc )
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diff changeset
972 break; // found it
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diff changeset
973 CYG_ASSERT( t != &__NETDEVTAB_END__, "eth_drv_dsr: Failed to find sc in NETDEVTAB" );
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parents: 182
diff changeset
974 }
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diff changeset
975 #endif // Checking code
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diff changeset
976
121
6bd9d475ed4b Merge from eCos master repository on 2000-09-04-20:50:20-BST
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diff changeset
977 sc->state |= ETH_DRV_NEEDS_DELIVERY;
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diff changeset
978
6bd9d475ed4b Merge from eCos master repository on 2000-09-04-20:50:20-BST
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diff changeset
979 ecos_synch_eth_drv_dsr(); // [request] run delivery function for this dev
6bd9d475ed4b Merge from eCos master repository on 2000-09-04-20:50:20-BST
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980 }
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981
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982 // This is called from the delivery thread, to do just that:
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983 void eth_drv_run_deliveries( void )
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984 {
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985 cyg_netdevtab_entry_t *t;
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986 for (t = &__NETDEVTAB__[0]; t != &__NETDEVTAB_END__; t++) {
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987 struct eth_drv_sc *sc = (struct eth_drv_sc *)t->device_instance;
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988 if ( ETH_DRV_NEEDS_DELIVERY & sc->state ) {
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989 #if defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT)
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990 cyg_bool was_ctrlc_int;
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991 #endif
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992 sc->state &=~ETH_DRV_NEEDS_DELIVERY;
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993 #if defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT)
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994 was_ctrlc_int = HAL_CTRLC_CHECK((*sc->funs->int_vector)(sc), (int)sc);
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995 if (!was_ctrlc_int) // Fall through and run normal code
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996 #endif
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997 (*sc->funs->deliver)(sc);
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998 }
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999 }
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1000 }
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1001
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1002 // This is called from the delivery thread, to unstick devices if there is
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1003 // no network activity.
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1004 #ifdef CYGPKG_NET_FAST_THREAD_TICKLE_DEVS
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1005 void eth_drv_tickle_devices( void )
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1006 {
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1007 cyg_netdevtab_entry_t *t;
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1008 for (t = &__NETDEVTAB__[0]; t != &__NETDEVTAB_END__; t++) {
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1009 struct eth_drv_sc *sc = (struct eth_drv_sc *)t->device_instance;
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1010 if ( ETH_DRV_STATE_ACTIVE & sc->state ) {
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1011 struct ifnet *ifp = &sc->sc_arpcom.ac_if;
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1012 // Try to dequeue a packet for this interface, if we can. This
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1013 // will call can_send() for active interfaces. It is calls to
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1014 // this function from tx_done() which normally provide
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1015 // continuous transmissions; otherwise we do not get control.
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1016 // This call fixes that.
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1017 eth_drv_send(ifp);
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1018 }
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1019 }
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1020 }
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1021 #endif // CYGPKG_NET_FAST_THREAD_TICKLE_DEVS
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1022
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1023 // ------------------------------------------------------------------------
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1024
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1025 #ifdef CYGPKG_IO_PCMCIA
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1026 // Lookup a 'netdev' entry, assuming that it is an ethernet device.
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1027 cyg_netdevtab_entry_t *
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1028 eth_drv_netdev(char *name)
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1029 {
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1030 cyg_netdevtab_entry_t *t;
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1031 struct eth_drv_sc *sc;
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1032 for (t = &__NETDEVTAB__[0]; t != &__NETDEVTAB_END__; t++) {
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1033 sc = (struct eth_drv_sc *)t->device_instance;
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1034 if (strcmp(sc->dev_name, name) == 0) {
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1035 return t;
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1036 }
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1037 }
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1038 return (cyg_netdevtab_entry_t *)NULL;
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1039 }
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1040 #endif // CYGPKG_IO_PCMCIA
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1041
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1042 // EOF src/net/eth_drv.c