Mercurial > flash_v2

annotate packages/io/eth/current/src/net/eth_drv.c @ 145:2e9a636d9de9 ecos-sw-2000-12-21

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Merge from eCos master repository on 2000-12-21-14:18:40-GMT
author jlarmour
date Fri, 22 Dec 2000 02:37:28 +0000
parents eb9fd8c04db3
children d397fc472bcf
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1 //==========================================================================
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2 //
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3 // ecos/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 //####COPYRIGHTBEGIN####
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9 //
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10 // -------------------------------------------
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11 // The contents of this file are subject to the Red Hat eCos Public License
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12 // Version 1.1 (the "License"); you may not use this file except in
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13 // compliance with the License. You may obtain a copy of the License at
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14 // http://www.redhat.com/
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15 //
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16 // Software distributed under the License is distributed on an "AS IS"
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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18 // License for the specific language governing rights and limitations under
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19 // the License.
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20 //
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21 // The Original Code is eCos - Embedded Configurable Operating System,
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22 // released September 30, 1998.
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23 //
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24 // The Initial Developer of the Original Code is Red Hat.
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25 // Portions created by Red Hat are
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26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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27 // All Rights Reserved.
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28 // -------------------------------------------
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29 //
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30 //####COPYRIGHTEND####
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31 //####BSDCOPYRIGHTBEGIN####
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32 //
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33 // -------------------------------------------
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34 //
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35 // Portions of this software may have been derived from OpenBSD or other sources,
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36 // and are covered by the appropriate copyright disclaimers included herein.
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37 //
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38 // -------------------------------------------
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39 //
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40 //####BSDCOPYRIGHTEND####
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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
115
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87 #include <eth_drv.h>
121
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88 #include <netdev.h>
115
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89
126
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90
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91
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92 // ------------------------------------------------------------------------
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93 #ifdef CYGPKG_IO_ETH_DRIVERS_SIMULATED_FAILURES
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94
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95 #define noLOG_RANDOM 32 // so you can tell this is really being random
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96 #ifdef LOG_RANDOM
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97 static struct {
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98 unsigned int *which;
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99 unsigned int random;
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100 unsigned int r100;
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101 } random_log[LOG_RANDOM];
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102
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103 static int random_index = 0;
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104 #endif
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105
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106 static unsigned int
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107 randomize( unsigned int *p )
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108 {
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109 unsigned int r100;
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110 HAL_CLOCK_READ( &r100 );
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111 r100 ^= *p;
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112 *p = (r100 * 1103515245) + 12345;
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113 r100 &= 127;
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114 if ( r100 >= 100 ) // spread the overflow around evenly
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115 r100 = 4 * (r100 - 100);
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116 if ( r100 >= 100 ) // and again - (125,126,127=>100,104,108)
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117 r100 = 12 * (r100 - 100); // =>(0,48,96)
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118 #ifdef LOG_RANDOM
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119 random_log[random_index].which = p;
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120 random_log[random_index].random = *p;
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121 random_log[random_index].r100 = r100;
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122 random_index++;
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123 random_index &= (LOG_RANDOM-1);
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124 #endif
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125 return r100;
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126 }
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127
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128 #define SIMULATE_FAIL_SEND 1
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129 #define SIMULATE_FAIL_RECV 2
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130 #define SIMULATE_FAIL_CORRUPT 3
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131
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132 static struct simulated_failure_state {
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133 struct eth_drv_sc *sc;
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134 unsigned int r_tx_fail;
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135 unsigned int r_rx_fail;
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136 unsigned int r_rx_corrupt;
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137 cyg_tick_count_t droptime;
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138 cyg_tick_count_t passtime;
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139 } simulated_failure_states[2] = {{0},{0}};
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140
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141 static int
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142 simulate_fail( struct eth_drv_sc *sc, int which )
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143 {
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144 struct simulated_failure_state *s;
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145
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146 for ( s = &simulated_failure_states[0]; s < &simulated_failure_states[2];
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147 s++ ) {
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148 if ( 0 == s->sc ) {
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149 s->sc = sc;
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150 s->r_tx_fail = (unsigned int)sc;
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151 s->r_rx_fail = (unsigned int)sc ^ 0x01234567;
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152 s->r_rx_corrupt = (unsigned int)sc ^ 0xdeadbeef;
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153 s->droptime = 0;
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154 s->passtime = 0;
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155 }
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156 if ( sc == s->sc )
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157 break;
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158 }
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159 if ( &simulated_failure_states[2] == s ) {
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160 CYG_FAIL( "No free slot in simulated_failure_states[]" );
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161 return 1; // always fail
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162 }
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163
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164 #ifdef CYGPKG_IO_ETH_DRIVERS_SIMULATE_LINE_CUT
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165 // Regardless of the question, we say "yes" during the period of
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166 // unpluggedness...
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167 {
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168 cyg_tick_count_t now = cyg_current_time();
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169 if ( now > s->droptime && 0 == s->passtime ) { // [initial condition]
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170 s->droptime = 0; // go into a passing phase
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171 (void)randomize( &s->r_tx_fail );
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172 (void)randomize( &s->r_rx_fail );
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173 (void)randomize( &s->r_rx_corrupt );
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174 s->passtime = s->r_tx_fail + s->r_rx_fail + s->r_rx_corrupt;
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175 s->passtime &= 0x3fff; // 16k cS is up to 160S, about 2.5 minutes
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176 s->passtime += now;
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177 }
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178 else if ( now > s->passtime && 0 == s->droptime ) {
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179 s->passtime = 0; // go into a dropping phase
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180 (void)randomize( &s->r_tx_fail );
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181 (void)randomize( &s->r_rx_fail );
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182 (void)randomize( &s->r_rx_corrupt );
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183 s->droptime = s->r_tx_fail + s->r_rx_fail + s->r_rx_corrupt;
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184 s->droptime &= 0x0fff; // 4k cS is up to 40S, about 1/2 a minute
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185 s->droptime += now;
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186 }
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187
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188 if ( now < s->droptime )
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189 return 1; // Say "no"
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190 }
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191 #endif
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192
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193 switch ( which ) {
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194 #ifdef CYGPKG_IO_ETH_DRIVERS_SIMULATE_DROP_TX
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195 case SIMULATE_FAIL_SEND: {
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196 unsigned int z = randomize( &s->r_tx_fail );
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197 return z < CYGPKG_IO_ETH_DRIVERS_SIMULATE_DROP_TX;
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198 }
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199 #endif
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200 #ifdef CYGPKG_IO_ETH_DRIVERS_SIMULATE_DROP_RX
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201 case SIMULATE_FAIL_RECV: {
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202 unsigned int z = randomize( &s->r_rx_fail );
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203 return z < CYGPKG_IO_ETH_DRIVERS_SIMULATE_DROP_RX;
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204 }
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205 #endif
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206 #ifdef CYGPKG_IO_ETH_DRIVERS_SIMULATE_CORRUPT_RX
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207 case SIMULATE_FAIL_CORRUPT: {
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208 unsigned int z = randomize( &s->r_rx_corrupt );
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209 return z < CYGPKG_IO_ETH_DRIVERS_SIMULATE_CORRUPT_RX;
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210 }
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211 #endif
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212 default:
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213 // do nothing - for when options above are not enabled.
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214 }
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215 return 0;
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216 }
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217
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218 #define noLOG_CORRUPTION 32 // so you can tell this is really being random
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219 #ifdef LOG_CORRUPTION
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220 static struct {
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221 int len;
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222 int thislen;
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223 int off;
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224 unsigned char xor;
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225 unsigned char idx;
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226 } corruption_log[LOG_CORRUPTION];
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227
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228 static int corruption_index = 0;
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229 #endif
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230
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231 static void
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232 simulate_fail_corrupt_sglist( struct eth_drv_sg *sg_list, int sg_len )
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233 {
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234 unsigned int z, len, i, off;
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235 HAL_CLOCK_READ( &z );
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236 z += simulated_failure_states[0].r_rx_corrupt;
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237 z += simulated_failure_states[1].r_rx_corrupt;
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238
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239 CYG_ASSERT( MAX_ETH_DRV_SG >= sg_len, "sg_len overflow in corrupt" );
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240
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241 for ( i = 0, len = 0; i < sg_len && sg_list[i].buf && sg_list[i].len; i++ )
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242 len =+ sg_list[i].len;
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243
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244 CYG_ASSERT( 1500 >= len, "sg...len > ether MTU" );
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245 if ( 14 >= len ) // normal ether header
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246 return;
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247
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248 off = z & 2047; // next (2^N-1) > MTU
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249 while ( off > len )
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250 off -= len;
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251
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252 for ( i = 0; i < sg_len && sg_list[i].buf && sg_list[i].len; i++ ) {
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253 if ( off < sg_list[i].len ) { // corrupt this one
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254 unsigned char *p = (unsigned char *)sg_list[i].buf;
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255 p[off] ^= (0xff & (z >> 11));
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256 #ifdef LOG_CORRUPTION
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257 corruption_log[corruption_index].len = len;
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258 corruption_log[corruption_index].thislen = sg_list[i].len;
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259 corruption_log[corruption_index].off = off;
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260 corruption_log[corruption_index].xor = (0xff & (z >> 11));
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261 corruption_log[corruption_index].idx = i;
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262 corruption_index++;
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263 corruption_index &= (LOG_CORRUPTION-1);
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264 #endif
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265 return;
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266 }
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267 off -= sg_list[i].len;
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268 }
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269 CYG_FAIL( "Didn't corrupt anything" );
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270 }
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271
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272 #endif // CYGPKG_IO_ETH_DRIVERS_SIMULATED_FAILURES
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273 // ------------------------------------------------------------------------
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274
115
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275 static int eth_drv_ioctl(struct ifnet *, u_long, caddr_t);
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276 static void eth_drv_send(struct ifnet *);
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277
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278 extern int net_debug; // FIXME
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279
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280 // Interfaces exported to drivers
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281
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282 static void eth_drv_init(struct eth_drv_sc *sc, unsigned char *enaddr);
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283 static void eth_drv_recv(struct eth_drv_sc *sc, int total_len);
121
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284 static void eth_drv_tx_done(struct eth_drv_sc *sc, CYG_ADDRESS key, int status);
115
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285
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286 struct eth_drv_funs eth_drv_funs = {eth_drv_init, eth_drv_recv, eth_drv_tx_done};
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287
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288 //
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289 // This function is called during system initialization to register a
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290 // network interface with the system.
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291 //
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292 static void
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293 eth_drv_init(struct eth_drv_sc *sc, unsigned char *enaddr)
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294 {
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295 struct ifnet *ifp = &sc->sc_arpcom.ac_if;
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296
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297 // Set up hardware address
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298 bcopy(enaddr, &sc->sc_arpcom.ac_enaddr, ETHER_ADDR_LEN);
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299
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300 // Initialize ifnet structure
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301 bcopy((void *)sc->dev_name, ifp->if_xname, IFNAMSIZ);
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302 ifp->if_softc = sc;
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303 ifp->if_start = eth_drv_send;
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304 ifp->if_ioctl = eth_drv_ioctl;
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305 ifp->if_flags =
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306 IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST;
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307 sc->state = 0;
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308
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309 // Attach the interface
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310 if_attach(ifp);
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311 ether_ifattach(ifp);
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312
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313 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_DIAG
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314 // Set up interfaces so debug environment can share this device
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315 {
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316 void *dbg = CYGACC_CALL_IF_DBG_DATA();
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317 if (!dbg) {
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318 CYGACC_CALL_IF_DBG_DATA_SET((void *)sc);
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319 }
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320 }
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321 #endif
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322 }
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323
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324 //
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325 // This [internal] function will be called to stop activity on an interface.
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326 //
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327 static void
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328 eth_drv_stop(struct eth_drv_sc *sc)
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329 {
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330 (sc->funs->stop)(sc);
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331 sc->state &= ~ETH_DRV_STATE_ACTIVE;
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332 }
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333
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334 //
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335 // This [internal] function will be called to start activity on an interface.
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336 //
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337 static void
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338 eth_drv_start(struct eth_drv_sc *sc)
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339 {
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340 struct ifnet *ifp = &sc->sc_arpcom.ac_if;
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341 // Perform any hardware initialization
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342 (sc->funs->start)(sc, (unsigned char *)&sc->sc_arpcom.ac_enaddr, 0);
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343 // Set 'running' flag, and clear output active flag.
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344 ifp->if_flags |= IFF_RUNNING;
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345 ifp->if_flags &= ~IFF_OACTIVE;
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346 sc->state |= ETH_DRV_STATE_ACTIVE;
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347 eth_drv_send(ifp); // Try and start up transmit
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348 }
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349
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350 //
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351 // This function supports "I/O control" operations on an interface.
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352 //
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353 static int
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354 eth_drv_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
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355 {
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356 struct eth_drv_sc *sc = ifp->if_softc;
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357 struct ifaddr *ifa = (struct ifaddr *) data;
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358 struct ifreq *ifr = (struct ifreq *)data;
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359 int s, error = 0;
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360
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361 s = splnet();
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362
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363 if ((error = ether_ioctl(ifp, &sc->sc_arpcom, cmd, data)) > 0) {
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364 splx(s);
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365 return error;
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366 }
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367
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368 switch (cmd) {
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369
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370 case SIOCSIFADDR:
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371 ifp->if_flags |= IFF_UP;
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372
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373 switch (ifa->ifa_addr->sa_family) {
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374 #ifdef INET
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375 case AF_INET:
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376 eth_drv_start(sc);
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377 arp_ifinit(&sc->sc_arpcom, ifa);
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378 break;
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379 #endif
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380 default:
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381 eth_drv_start(sc);
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382 break;
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383 }
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384 break;
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385
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386 case SIOCGIFHWADDR:
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387 // Get hardware (MAC) address
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388 ifr->ifr_hwaddr.sa_family = AF_INET;
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389 bcopy(&sc->sc_arpcom.ac_enaddr, &ifr->ifr_hwaddr.sa_data, ETHER_ADDR_LEN);
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390 break;
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391
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392 case SIOCSIFHWADDR:
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393 // Set hardware (MAC) address
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394 bcopy(&ifr->ifr_hwaddr.sa_data, &sc->sc_arpcom.ac_enaddr, ETHER_ADDR_LEN);
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395 if ((sc->funs->control)(sc, ETH_DRV_SET_MAC_ADDRESS,
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396 &sc->sc_arpcom.ac_enaddr, ETHER_ADDR_LEN)) {
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397 error = EINVAL;
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398 }
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399 break;
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400
117
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401 #ifdef SIOCGIFSTATS
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402 case SIOCGIFSTATS:
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403 #ifdef SIOCGIFSTATSUD
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404 case SIOCGIFSTATSUD:
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405 #endif
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406 // Get interface statistics:
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407 if ((sc->funs->control)(sc, (cmd == SIOCGIFSTATS)
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408 ? ETH_DRV_GET_IF_STATS
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409 : ETH_DRV_GET_IF_STATS_UD,
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410 data, 0 ) ) {
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411 error = EINVAL;
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412 }
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413 break;
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414 #endif // SIOCGIFSTATS
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415
115
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416 case SIOCSIFFLAGS:
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417 if ((ifp->if_flags & IFF_UP) == 0 &&
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418 (ifp->if_flags & IFF_RUNNING) != 0) {
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419 /*
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420 * If interface is marked down and it is running, then
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421 * stop it.
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422 */
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423 eth_drv_stop(sc);
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424 ifp->if_flags &= ~IFF_RUNNING;
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425 } else
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426 if ((ifp->if_flags & IFF_UP) != 0 &&
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427 (ifp->if_flags & IFF_RUNNING) == 0) {
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428 /*
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parents:
diff changeset
429 * If interface is marked up and it is stopped, then
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jlarmour
parents:
diff changeset
430 * start it.
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parents:
diff changeset
431 */
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parents:
diff changeset
432 eth_drv_start(sc);
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parents:
diff changeset
433 } else {
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jlarmour
parents:
diff changeset
434 /*
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jlarmour
parents:
diff changeset
435 * Reset the interface to pick up changes in any other
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jlarmour
parents:
diff changeset
436 * flags that affect hardware registers.
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parents:
diff changeset
437 */
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parents:
diff changeset
438 eth_drv_stop(sc);
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parents:
diff changeset
439 eth_drv_start(sc);
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parents:
diff changeset
440 }
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diff changeset
441 break;
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parents:
diff changeset
442
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jlarmour
parents:
diff changeset
443 #if 0
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parents:
diff changeset
444 case SIOCADDMULTI:
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parents:
diff changeset
445 case SIOCDELMULTI:
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jlarmour
parents:
diff changeset
446 /* Update our multicast list. */
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diff changeset
447 error = (cmd == SIOCADDMULTI) ?
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448 ether_addmulti(ifr, &sc->sc_arpcom) :
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449 ether_delmulti(ifr, &sc->sc_arpcom);
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450
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451 if (error == ENETRESET) {
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parents:
diff changeset
452 /*
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453 * Multicast list has changed; set the hardware filter
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diff changeset
454 * accordingly.
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455 */
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456 eth_drv_stop(sc); /* XXX for ds_setmcaf? */
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diff changeset
457 eth_drv_start(sc);
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458 error = 0;
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459 }
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460 break;
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461 #endif
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462
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jlarmour
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diff changeset
463 default:
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464 error = EINVAL;
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465 break;
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466 }
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467
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diff changeset
468 splx(s);
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diff changeset
469 return (error);
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470 }
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471
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diff changeset
472 //
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473 // This routine is called to start transmitting if there is data
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diff changeset
474 // available.
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475 //
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476 static void
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jlarmour
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diff changeset
477 eth_drv_send(struct ifnet *ifp)
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diff changeset
478 {
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479 struct eth_drv_sc *sc = ifp->if_softc;
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480 struct eth_drv_sg sg_list[MAX_ETH_DRV_SG];
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481 int sg_len;
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diff changeset
482 struct mbuf *m0, *m;
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diff changeset
483 int len, total_len;
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diff changeset
484 unsigned char *data;
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485
121
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diff changeset
486 // This is now only called from network threads, so no guarding is
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487 // required; locking is in place via the splfoo() mechanism already.
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488
115
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489 if ((ifp->if_flags & IFF_RUNNING) != IFF_RUNNING) {
121
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diff changeset
490 return;
115
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491 }
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492
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493 while ((sc->funs->can_send)(sc) > 0) {
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494 IF_DEQUEUE(&ifp->if_snd, m0);
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495 if (m0 == 0) {
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diff changeset
496 break;
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497 }
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498
126
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diff changeset
499 #ifdef CYGPKG_IO_ETH_DRIVERS_SIMULATED_FAILURES
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diff changeset
500 if ( simulate_fail( sc, SIMULATE_FAIL_SEND ) ) {
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diff changeset
501 // must free the mbufs
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diff changeset
502 m_freem(m0);
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diff changeset
503 continue; // next packet to send
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504 }
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diff changeset
505 #endif
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diff changeset
506
115
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diff changeset
507 if (net_debug)
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diff changeset
508 diag_printf("Sending %d bytes\n", m0->m_pkthdr.len);
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diff changeset
509
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jlarmour
parents:
diff changeset
510 /* We need to use m->m_pkthdr.len, so require the header */
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511 if ((m0->m_flags & M_PKTHDR) == 0)
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512 panic("eth_drv_send: no header mbuf");
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diff changeset
513
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jlarmour
parents:
diff changeset
514 #if NBPFILTER > 0
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jlarmour
parents:
diff changeset
515 /* Tap off here if there is a BPF listener. */
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diff changeset
516 if (ifp->if_bpf)
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517 bpf_mtap(ifp->if_bpf, m0);
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diff changeset
518 #endif
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519
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jlarmour
parents:
diff changeset
520 // Extract data pointers (don't actually move data here)
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521 sg_len = 0; total_len = 0;
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522 for (m = m0; m ; m = m->m_next) {
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523 data = mtod(m, u_char *);
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diff changeset
524 len = m->m_len;
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525 total_len += len;
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jlarmour
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diff changeset
526 sg_list[sg_len].buf = (CYG_ADDRESS)data;
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jlarmour
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diff changeset
527 sg_list[sg_len].len = len;
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diff changeset
528 if ( len )
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diff changeset
529 sg_len++;
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diff changeset
530 if (net_debug) {
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jlarmour
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diff changeset
531 diag_printf("xmit %d bytes at %x sg[%d]\n", len, data, sg_len);
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jlarmour
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diff changeset
532 if ( 1 & net_debug )
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jlarmour
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diff changeset
533 diag_dump_buf(data, len);
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jlarmour
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534 }
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jlarmour
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diff changeset
535 if ( MAX_ETH_DRV_SG < sg_len ) {
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jlarmour
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diff changeset
536 diag_printf("too many mbufs to tx, %d > %d\n", sg_len, MAX_ETH_DRV_SG );
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diff changeset
537 sg_len = 0;
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diff changeset
538 break; // drop it on the floor
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539 }
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540 }
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jlarmour
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diff changeset
541
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jlarmour
parents:
diff changeset
542 // Tell hardware to send this packet
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jlarmour
parents:
diff changeset
543 if ( sg_len )
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jlarmour
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diff changeset
544 (sc->funs->send)(sc, sg_list, sg_len, total_len, (unsigned long)m0);
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545 }
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jlarmour
parents:
diff changeset
546 }
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jlarmour
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diff changeset
547
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jlarmour
parents:
diff changeset
548 //
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jlarmour
parents:
diff changeset
549 // This function is called from the hardware driver when an output operation
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jlarmour
parents:
diff changeset
550 // has completed - i.e. the packet has been sent.
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jlarmour
parents:
diff changeset
551 //
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diff changeset
552 static struct mbuf *mbuf_key;
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diff changeset
553
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jlarmour
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554 static void
121
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diff changeset
555 eth_drv_tx_done(struct eth_drv_sc *sc, CYG_ADDRESS key, int status)
115
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diff changeset
556 {
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diff changeset
557 struct ifnet *ifp = &sc->sc_arpcom.ac_if;
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jlarmour
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diff changeset
558 struct mbuf *m0 = (struct mbuf *)key;
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jlarmour
parents:
diff changeset
559 // Check for errors here (via 'status')
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jlarmour
parents:
diff changeset
560 // Done with packet
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diff changeset
561 mbuf_key = m0;
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diff changeset
562 m_freem(m0);
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jlarmour
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diff changeset
563 // Start another if possible
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jlarmour
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diff changeset
564 eth_drv_send(ifp);
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jlarmour
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diff changeset
565 }
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jlarmour
parents:
diff changeset
566
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jlarmour
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diff changeset
567 //
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jlarmour
parents:
diff changeset
568 // This function is called from a hardware driver to indicate that an input
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jlarmour
parents:
diff changeset
569 // packet has arrived. The routine will set up appropriate network resources
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jlarmour
parents:
diff changeset
570 // (mbuf's) to hold the data and call back into the driver to retrieve the data.
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jlarmour
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diff changeset
571 //
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jlarmour
parents:
diff changeset
572 static void
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573 eth_drv_recv(struct eth_drv_sc *sc, int total_len)
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574 {
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575 struct ifnet *ifp = &sc->sc_arpcom.ac_if;
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576 struct ether_header _eh, *eh=&_eh;
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577 struct mbuf *top, **mp, *m;
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578 int i, mlen;
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579 unsigned char *data;
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580 struct eth_drv_sg sg_list[MAX_ETH_DRV_SG];
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581 int sg_len;
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582
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583 if ((ifp->if_flags & IFF_RUNNING) != IFF_RUNNING) {
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584 return; // Interface not up, ignore this request
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585 }
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586
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587 CYG_ASSERT( 0 != total_len, "total_len is zero!" );
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588 CYG_ASSERT( 0 <= total_len, "total_len is negative!" );
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589 CYG_ASSERT( sizeof( struct ether_header ) <= total_len,
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590 "No ether header here!" );
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591
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diff changeset
592 if ( total_len < sizeof( struct ether_header ) )
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diff changeset
593 // Our arithmetic below would go wrong
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diff changeset
594 return;
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595
126
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596 #ifdef CYGPKG_IO_ETH_DRIVERS_SIMULATED_FAILURES
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597 if ( simulate_fail( sc, SIMULATE_FAIL_RECV ) ) {
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598 // there is nothing we need to do; simply do not
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diff changeset
599 // unload the packet
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600 ifp->if_ierrors++;
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601 return;
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602 }
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603 #endif
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604
115
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605 /* Pull packet off interface. */
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diff changeset
606 MGETHDR(m, M_DONTWAIT, MT_DATA);
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607 if (m == 0) {
130
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608 #ifdef CYGPKG_IO_ETH_DRIVERS_WARN_NO_MBUFS
115
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609 diag_printf("warning: eth_recv out of MBUFs\n");
130
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610 #endif
115
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611 }
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612
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diff changeset
613 // Set up buffers
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diff changeset
614 // Unload ethernet header separately so IP/UDP/TCP headers are aligned
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615 sg_list[0].buf = (CYG_ADDRESS)eh;
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616 sg_list[0].len = sizeof(*eh);
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617 sg_len = 1;
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618
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619 // Compute total length (minus ethernet header)
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620 total_len -= sizeof(*eh);
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621
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622 top = 0;
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623 mlen = MHLEN;
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624 mp = &top;
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625
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626 if (m) {
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627 m->m_pkthdr.rcvif = ifp;
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628 m->m_pkthdr.len = total_len;
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629 } else {
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630 sg_list[sg_len].buf = (CYG_ADDRESS)0;
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631 sg_list[sg_len].len = min(total_len, MCLBYTES);
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632 sg_len++;
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633 total_len = 0;
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634 }
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635
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636 while (total_len > 0) {
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diff changeset
637 if (top) {
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638 MGET(m, M_DONTWAIT, MT_DATA);
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639 if (m == 0) {
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640 m_freem(top);
130
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641 #ifdef CYGPKG_IO_ETH_DRIVERS_WARN_NO_MBUFS
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642 diag_printf("out of MBUFs [2]");
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643 #endif
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644 sg_list[sg_len].buf = (CYG_ADDRESS)0;
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645 sg_list[sg_len].len = 0;
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646 sg_len = 1;
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647 break;
115
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648 }
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649 mlen = MLEN;
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650 }
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651 if (total_len >= MINCLSIZE) {
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652 MCLGET(m, M_DONTWAIT);
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653 if ((m->m_flags & M_EXT) == 0) {
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654 m_freem(top);
130
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diff changeset
655 #ifdef CYGPKG_IO_ETH_DRIVERS_WARN_NO_MBUFS
115
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656 diag_printf("warning: eth_recv out of MBUFs\n");
130
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657 #endif
115
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658 sg_list[sg_len].buf = (CYG_ADDRESS)0;
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659 sg_list[sg_len].len = min(total_len, MCLBYTES);
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660 sg_len++;
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661 top = 0;
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662 break;
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663 }
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diff changeset
664 mlen = MCLBYTES;
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665 }
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666 m->m_len = mlen = min(total_len, mlen);
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667 total_len -= mlen;
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668 data = mtod(m, caddr_t);
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diff changeset
669 sg_list[sg_len].buf = (CYG_ADDRESS)data;
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670 sg_list[sg_len].len = mlen;
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671 sg_len++;
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672 *mp = m;
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673 mp = &m->m_next;
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diff changeset
674 }
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parents:
diff changeset
675
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676 // Ask hardware to unload buffers
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677 (sc->funs->recv)(sc, sg_list, sg_len);
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678
126
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679 #ifdef CYGPKG_IO_ETH_DRIVERS_SIMULATED_FAILURES
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680 if ( simulate_fail( sc, SIMULATE_FAIL_CORRUPT ) ) {
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681 // Corrupt the data
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682 simulate_fail_corrupt_sglist( sg_list, sg_len );
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683 }
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diff changeset
684 #endif
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685
115
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686 if (net_debug) {
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diff changeset
687 for (i = 0; i < sg_len; i++) {
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diff changeset
688 if (sg_list[i].buf) {
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diff changeset
689 diag_printf("rx %d bytes at %x sg[%d]\n", sg_list[i].len, sg_list[i].buf, i);
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diff changeset
690 if ( 1 & net_debug )
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diff changeset
691 diag_dump_buf((void *)sg_list[i].buf, sg_list[i].len);
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parents:
diff changeset
692 }
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diff changeset
693 }
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diff changeset
694 }
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diff changeset
695
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diff changeset
696 m = top;
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diff changeset
697 if (m == 0) {
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diff changeset
698 ifp->if_ierrors++;
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diff changeset
699 return;
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parents:
diff changeset
700 }
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parents:
diff changeset
701
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diff changeset
702 ifp->if_ipackets++;
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parents:
diff changeset
703
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diff changeset
704
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705 #if NBPFILTER > 0
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diff changeset
706 #error FIXME - Need mbuf with ethernet header attached
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jlarmour
parents:
diff changeset
707 /*
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jlarmour
parents:
diff changeset
708 * Check if there's a BPF listener on this interface.
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diff changeset
709 * If so, hand off the raw packet to bpf.
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710 */
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diff changeset
711 if (ifp->if_bpf)
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712 bpf_mtap(ifp->if_bpf, m);
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diff changeset
713 #endif
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714
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715 // Push data into protocol stacks
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716 ether_input(ifp, eh, m);
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717 }
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718
121
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719
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720 // ------------------------------------------------------------------------
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721 // DSR to schedule network delivery thread
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722
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723 extern void ecos_synch_eth_drv_dsr(void); // from ecos/timeout.c in net stack
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724
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725 void
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726 eth_drv_dsr(cyg_vector_t vector,
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727 cyg_ucount32 count,
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728 cyg_addrword_t data)
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729 {
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730 struct eth_drv_sc *sc = (struct eth_drv_sc *)data;
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731
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732 sc->state |= ETH_DRV_NEEDS_DELIVERY;
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733
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734 ecos_synch_eth_drv_dsr(); // [request] run delivery function for this dev
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735 }
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736
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737 // This is called from the delivery thread, to do just that:
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738 void eth_drv_run_deliveries( void )
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739 {
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740 cyg_netdevtab_entry_t *t;
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741 for (t = &__NETDEVTAB__[0]; t != &__NETDEVTAB_END__; t++) {
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742 struct eth_drv_sc *sc = (struct eth_drv_sc *)t->device_instance;
128
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743 if ( ETH_DRV_NEEDS_DELIVERY & sc->state ) {
145
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744 #if defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT)
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745 cyg_bool was_ctrlc_int;
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746 #endif
128
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747 sc->state &=~ETH_DRV_NEEDS_DELIVERY;
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748 #if defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT)
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749 was_ctrlc_int = HAL_CTRLC_CHECK((*sc->funs->int_vector)(sc), sc);
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750 if (!was_ctrlc_int) // Fall through and run normal code
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751 #endif
121
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752 (*sc->funs->deliver)(sc);
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753 }
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754 }
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755 }
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756
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757
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758 // ------------------------------------------------------------------------
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759
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760 #ifdef CYGPKG_IO_PCMCIA
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761 // Lookup a 'netdev' entry, assuming that it is an ethernet device.
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762 cyg_netdevtab_entry_t *
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763 eth_drv_netdev(char *name)
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764 {
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765 cyg_netdevtab_entry_t *t;
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766 struct eth_drv_sc *sc;
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767 for (t = &__NETDEVTAB__[0]; t != &__NETDEVTAB_END__; t++) {
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768 sc = (struct eth_drv_sc *)t->device_instance;
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769 if (strcmp(sc->dev_name, name) == 0) {
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770 return t;
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771 }
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772 }
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773 return (cyg_netdevtab_entry_t *)NULL;
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774 }
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775 #endif // CYGPKG_IO_PCMCIA
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776
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777 // EOF eth_drv.c