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annotate packages/io/eth/current/src/net/eth_drv.c @ 195:67850532eebb

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Merge from eCos master repository on 2001-11-02-06:43:03-GMT
author jlarmour
date Fri, 02 Nov 2001 16:12:33 +0000
parents 678094f34118
children 920b9b754b53
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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 //==========================================================================
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32 //#####DESCRIPTIONBEGIN####
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33 //
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34 // Author(s): gthomas
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35 // Contributors: gthomas
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36 // Date: 2000-01-10
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37 // Purpose: Hardware independent ethernet driver
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38 // Description:
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39 //
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40 //
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41 //####DESCRIPTIONEND####
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42 //
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43 //==========================================================================
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44
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45 // High-level ethernet driver
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46
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47 #include <sys/param.h>
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48 #include <sys/errno.h>
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49 #include <sys/ioctl.h>
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50 #include <sys/mbuf.h>
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51 #include <sys/socket.h>
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52
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53 #include <net/if.h>
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54 #include <net/if_dl.h>
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55 #include <net/if_types.h>
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56 #include <net/netisr.h>
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57
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58 #ifdef INET
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59 #include <netinet/in.h>
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60 #include <netinet/in_systm.h>
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61 #include <netinet/in_var.h>
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62 #include <netinet/ip.h>
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63 #include <netinet/if_ether.h>
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64 #endif
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65
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66 #if NBPFILTER > 0
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67 #include <net/bpf.h>
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68 #include <net/bpfdesc.h>
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69 #endif
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70
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71 #include <cyg/infra/cyg_ass.h>
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72 #include <cyg/hal/drv_api.h>
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73 #include <pkgconf/hal.h>
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74 #include <cyg/hal/hal_if.h>
126
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75 #include <pkgconf/io_eth_drivers.h> // module configury; SIMULATED_FAILURES
184
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76 #include <pkgconf/net.h> // CYGPKG_NET_FAST_THREAD_TICKLE_DEVS?
126
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77
115
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78 #include <eth_drv.h>
121
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79 #include <netdev.h>
115
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80
188
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81 #ifndef min
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82 #define min( _x_, _y_ ) ((_x_) < (_y_) ? (_x_) : (_y_))
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83 #endif
126
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84
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85 // ------------------------------------------------------------------------
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86 #ifdef CYGPKG_IO_ETH_DRIVERS_SIMULATED_FAILURES
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87
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88 #define noLOG_RANDOM 32 // so you can tell this is really being random
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89 #ifdef LOG_RANDOM
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90 static struct {
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91 unsigned int *which;
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92 unsigned int random;
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93 unsigned int r100;
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94 } random_log[LOG_RANDOM];
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95
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96 static int random_index = 0;
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97 #endif
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98
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99 static unsigned int
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100 randomize( unsigned int *p )
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101 {
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102 unsigned int r100;
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103 HAL_CLOCK_READ( &r100 );
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104 r100 ^= *p;
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105 *p = (r100 * 1103515245) + 12345;
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106 r100 &= 127;
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107 if ( r100 >= 100 ) // spread the overflow around evenly
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108 r100 = 4 * (r100 - 100);
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109 if ( r100 >= 100 ) // and again - (125,126,127=>100,104,108)
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110 r100 = 12 * (r100 - 100); // =>(0,48,96)
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111 #ifdef LOG_RANDOM
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112 random_log[random_index].which = p;
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113 random_log[random_index].random = *p;
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114 random_log[random_index].r100 = r100;
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115 random_index++;
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116 random_index &= (LOG_RANDOM-1);
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117 #endif
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118 return r100;
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119 }
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120
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121 #define SIMULATE_FAIL_SEND 1
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122 #define SIMULATE_FAIL_RECV 2
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123 #define SIMULATE_FAIL_CORRUPT 3
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124
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125 static struct simulated_failure_state {
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126 struct eth_drv_sc *sc;
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127 unsigned int r_tx_fail;
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128 unsigned int r_rx_fail;
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129 unsigned int r_rx_corrupt;
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130 cyg_tick_count_t droptime;
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131 cyg_tick_count_t passtime;
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132 } simulated_failure_states[2] = {{0},{0}};
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133
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134 static int
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135 simulate_fail( struct eth_drv_sc *sc, int which )
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136 {
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137 struct simulated_failure_state *s;
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138
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139 for ( s = &simulated_failure_states[0]; s < &simulated_failure_states[2];
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140 s++ ) {
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141 if ( 0 == s->sc ) {
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142 s->sc = sc;
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143 s->r_tx_fail = (unsigned int)sc;
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144 s->r_rx_fail = (unsigned int)sc ^ 0x01234567;
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145 s->r_rx_corrupt = (unsigned int)sc ^ 0xdeadbeef;
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146 s->droptime = 0;
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147 s->passtime = 0;
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148 }
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149 if ( sc == s->sc )
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150 break;
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151 }
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152 if ( &simulated_failure_states[2] == s ) {
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153 CYG_FAIL( "No free slot in simulated_failure_states[]" );
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154 return 1; // always fail
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155 }
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156
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157 #ifdef CYGPKG_IO_ETH_DRIVERS_SIMULATE_LINE_CUT
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158 // Regardless of the question, we say "yes" during the period of
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159 // unpluggedness...
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160 {
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161 cyg_tick_count_t now = cyg_current_time();
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162 if ( now > s->droptime && 0 == s->passtime ) { // [initial condition]
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163 s->droptime = 0; // go into a passing phase
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164 (void)randomize( &s->r_tx_fail );
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165 (void)randomize( &s->r_rx_fail );
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166 (void)randomize( &s->r_rx_corrupt );
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167 s->passtime = s->r_tx_fail + s->r_rx_fail + s->r_rx_corrupt;
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168 s->passtime &= 0x3fff; // 16k cS is up to 160S, about 2.5 minutes
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169 s->passtime += now;
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170 }
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171 else if ( now > s->passtime && 0 == s->droptime ) {
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172 s->passtime = 0; // go into a dropping phase
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173 (void)randomize( &s->r_tx_fail );
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174 (void)randomize( &s->r_rx_fail );
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175 (void)randomize( &s->r_rx_corrupt );
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176 s->droptime = s->r_tx_fail + s->r_rx_fail + s->r_rx_corrupt;
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177 s->droptime &= 0x0fff; // 4k cS is up to 40S, about 1/2 a minute
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178 s->droptime += now;
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179 }
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180
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181 if ( now < s->droptime )
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182 return 1; // Say "no"
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183 }
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184 #endif
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185
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186 switch ( which ) {
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187 #ifdef CYGPKG_IO_ETH_DRIVERS_SIMULATE_DROP_TX
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188 case SIMULATE_FAIL_SEND: {
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189 unsigned int z = randomize( &s->r_tx_fail );
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190 return z < CYGPKG_IO_ETH_DRIVERS_SIMULATE_DROP_TX;
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191 }
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192 #endif
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193 #ifdef CYGPKG_IO_ETH_DRIVERS_SIMULATE_DROP_RX
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194 case SIMULATE_FAIL_RECV: {
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195 unsigned int z = randomize( &s->r_rx_fail );
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196 return z < CYGPKG_IO_ETH_DRIVERS_SIMULATE_DROP_RX;
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197 }
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198 #endif
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199 #ifdef CYGPKG_IO_ETH_DRIVERS_SIMULATE_CORRUPT_RX
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200 case SIMULATE_FAIL_CORRUPT: {
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201 unsigned int z = randomize( &s->r_rx_corrupt );
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202 return z < CYGPKG_IO_ETH_DRIVERS_SIMULATE_CORRUPT_RX;
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203 }
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204 #endif
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205 default:
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206 // do nothing - for when options above are not enabled.
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207 }
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208 return 0;
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209 }
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210
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211 #define noLOG_CORRUPTION 32 // so you can tell this is really being random
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212 #ifdef LOG_CORRUPTION
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213 static struct {
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214 int len;
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215 int thislen;
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216 int off;
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217 unsigned char xor;
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218 unsigned char idx;
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219 } corruption_log[LOG_CORRUPTION];
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220
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221 static int corruption_index = 0;
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222 #endif
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223
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224 static void
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225 simulate_fail_corrupt_sglist( struct eth_drv_sg *sg_list, int sg_len )
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226 {
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227 unsigned int z, len, i, off;
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228 HAL_CLOCK_READ( &z );
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229 z += simulated_failure_states[0].r_rx_corrupt;
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230 z += simulated_failure_states[1].r_rx_corrupt;
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231
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232 CYG_ASSERT( MAX_ETH_DRV_SG >= sg_len, "sg_len overflow in corrupt" );
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233
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234 for ( i = 0, len = 0; i < sg_len && sg_list[i].buf && sg_list[i].len; i++ )
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235 len =+ sg_list[i].len;
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236
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237 CYG_ASSERT( 1500 >= len, "sg...len > ether MTU" );
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238 if ( 14 >= len ) // normal ether header
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239 return;
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240
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241 off = z & 2047; // next (2^N-1) > MTU
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242 while ( off > len )
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243 off -= len;
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244
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245 for ( i = 0; i < sg_len && sg_list[i].buf && sg_list[i].len; i++ ) {
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246 if ( off < sg_list[i].len ) { // corrupt this one
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247 unsigned char *p = (unsigned char *)sg_list[i].buf;
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248 p[off] ^= (0xff & (z >> 11));
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249 #ifdef LOG_CORRUPTION
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250 corruption_log[corruption_index].len = len;
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251 corruption_log[corruption_index].thislen = sg_list[i].len;
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252 corruption_log[corruption_index].off = off;
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253 corruption_log[corruption_index].xor = (0xff & (z >> 11));
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254 corruption_log[corruption_index].idx = i;
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255 corruption_index++;
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256 corruption_index &= (LOG_CORRUPTION-1);
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257 #endif
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258 return;
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259 }
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260 off -= sg_list[i].len;
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261 }
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262 CYG_FAIL( "Didn't corrupt anything" );
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263 }
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264
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265 #endif // CYGPKG_IO_ETH_DRIVERS_SIMULATED_FAILURES
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266 // ------------------------------------------------------------------------
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267
115
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268 static int eth_drv_ioctl(struct ifnet *, u_long, caddr_t);
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269 static void eth_drv_send(struct ifnet *);
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270
191
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271 #ifdef CYGDBG_IO_ETH_DRIVERS_DEBUG
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272 int cyg_io_eth_net_debug = CYGDBG_IO_ETH_DRIVERS_DEBUG_VERBOSITY;
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273 #endif
115
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274
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275 // Interfaces exported to drivers
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276
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277 static void eth_drv_init(struct eth_drv_sc *sc, unsigned char *enaddr);
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278 static void eth_drv_recv(struct eth_drv_sc *sc, int total_len);
121
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279 static void eth_drv_tx_done(struct eth_drv_sc *sc, CYG_ADDRESS key, int status);
115
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280
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281 struct eth_drv_funs eth_drv_funs = {eth_drv_init, eth_drv_recv, eth_drv_tx_done};
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282
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283 //
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284 // This function is called during system initialization to register a
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285 // network interface with the system.
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286 //
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287 static void
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288 eth_drv_init(struct eth_drv_sc *sc, unsigned char *enaddr)
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289 {
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290 struct ifnet *ifp = &sc->sc_arpcom.ac_if;
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291
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292 // Set up hardware address
149
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293 if (NULL != enaddr)
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294 bcopy(enaddr, &sc->sc_arpcom.ac_enaddr, ETHER_ADDR_LEN);
115
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295
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296 // Initialize ifnet structure
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297 bcopy((void *)sc->dev_name, ifp->if_xname, IFNAMSIZ);
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298 ifp->if_softc = sc;
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299 ifp->if_start = eth_drv_send;
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300 ifp->if_ioctl = eth_drv_ioctl;
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301 ifp->if_flags =
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302 IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST;
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303 sc->state = 0;
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304
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305 // Attach the interface
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306 if_attach(ifp);
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307 ether_ifattach(ifp);
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308
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309 #ifdef CYGSEM_HAL_VIRTUAL_VECTOR_DIAG
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310 // Set up interfaces so debug environment can share this device
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311 {
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312 void *dbg = CYGACC_CALL_IF_DBG_DATA();
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313 if (!dbg) {
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314 CYGACC_CALL_IF_DBG_DATA_SET((void *)sc);
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315 }
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316 }
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317 #endif
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318 }
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319
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320 //
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321 // This [internal] function will be called to stop activity on an interface.
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322 //
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323 static void
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324 eth_drv_stop(struct eth_drv_sc *sc)
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325 {
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326 (sc->funs->stop)(sc);
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327 sc->state &= ~ETH_DRV_STATE_ACTIVE;
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328 }
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329
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330 //
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331 // This [internal] function will be called to start activity on an interface.
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332 //
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333 static void
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334 eth_drv_start(struct eth_drv_sc *sc)
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335 {
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336 struct ifnet *ifp = &sc->sc_arpcom.ac_if;
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337 // Perform any hardware initialization
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338 (sc->funs->start)(sc, (unsigned char *)&sc->sc_arpcom.ac_enaddr, 0);
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339 // Set 'running' flag, and clear output active flag.
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340 ifp->if_flags |= IFF_RUNNING;
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341 ifp->if_flags &= ~IFF_OACTIVE;
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342 sc->state |= ETH_DRV_STATE_ACTIVE;
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343 eth_drv_send(ifp); // Try and start up transmit
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344 }
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345
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346 //
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347 // This function supports "I/O control" operations on an interface.
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348 //
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349 static int
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350 eth_drv_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
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351 {
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352 struct eth_drv_sc *sc = ifp->if_softc;
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353 struct ifaddr *ifa = (struct ifaddr *) data;
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354 struct ifreq *ifr = (struct ifreq *)data;
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355 int s, error = 0;
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356
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357 s = splnet();
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358
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359 if ((error = ether_ioctl(ifp, &sc->sc_arpcom, cmd, data)) > 0) {
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360 splx(s);
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361 return error;
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362 }
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363
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364 switch (cmd) {
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365
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366 case SIOCSIFADDR:
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367 ifp->if_flags |= IFF_UP;
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368
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369 switch (ifa->ifa_addr->sa_family) {
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370 #ifdef INET
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371 case AF_INET:
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372 eth_drv_start(sc);
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373 arp_ifinit(&sc->sc_arpcom, ifa);
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374 break;
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375 #endif
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376 default:
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377 eth_drv_start(sc);
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378 break;
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379 }
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380 break;
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381
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382 case SIOCGIFHWADDR:
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383 // Get hardware (MAC) address
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384 ifr->ifr_hwaddr.sa_family = AF_INET;
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385 bcopy(&sc->sc_arpcom.ac_enaddr, &ifr->ifr_hwaddr.sa_data, ETHER_ADDR_LEN);
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386 break;
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387
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388 case SIOCSIFHWADDR:
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389 // Set hardware (MAC) address
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390 bcopy(&ifr->ifr_hwaddr.sa_data, &sc->sc_arpcom.ac_enaddr, ETHER_ADDR_LEN);
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391 if ((sc->funs->control)(sc, ETH_DRV_SET_MAC_ADDRESS,
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392 &sc->sc_arpcom.ac_enaddr, ETHER_ADDR_LEN)) {
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393 error = EINVAL;
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394 }
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395 break;
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396
117
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397 #ifdef SIOCGIFSTATS
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398 case SIOCGIFSTATS:
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399 #ifdef SIOCGIFSTATSUD
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400 case SIOCGIFSTATSUD:
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401 #endif
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402 // Get interface statistics:
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403 if ((sc->funs->control)(sc, (cmd == SIOCGIFSTATS)
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404 ? ETH_DRV_GET_IF_STATS
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405 : ETH_DRV_GET_IF_STATS_UD,
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406 data, 0 ) ) {
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407 error = EINVAL;
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408 }
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409 break;
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410 #endif // SIOCGIFSTATS
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411
115
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412 case SIOCSIFFLAGS:
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413 if ((ifp->if_flags & IFF_UP) == 0 &&
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414 (ifp->if_flags & IFF_RUNNING) != 0) {
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415 /*
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416 * If interface is marked down and it is running, then
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417 * stop it.
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418 */
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419 eth_drv_stop(sc);
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420 ifp->if_flags &= ~IFF_RUNNING;
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421 } else
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422 if ((ifp->if_flags & IFF_UP) != 0 &&
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423 (ifp->if_flags & IFF_RUNNING) == 0) {
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424 /*
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425 * If interface is marked up and it is stopped, then
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426 * start it.
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diff changeset
427 */
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parents:
diff changeset
428 eth_drv_start(sc);
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parents:
diff changeset
429 } else {
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jlarmour
parents:
diff changeset
430 /*
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jlarmour
parents:
diff changeset
431 * Reset the interface to pick up changes in any other
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parents:
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432 * flags that affect hardware registers.
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diff changeset
433 */
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diff changeset
434 eth_drv_stop(sc);
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parents:
diff changeset
435 eth_drv_start(sc);
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parents:
diff changeset
436 }
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diff changeset
437 break;
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jlarmour
parents:
diff changeset
438
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jlarmour
parents:
diff changeset
439 #if 0
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jlarmour
parents:
diff changeset
440 case SIOCADDMULTI:
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jlarmour
parents:
diff changeset
441 case SIOCDELMULTI:
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jlarmour
parents:
diff changeset
442 /* Update our multicast list. */
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jlarmour
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diff changeset
443 error = (cmd == SIOCADDMULTI) ?
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444 ether_addmulti(ifr, &sc->sc_arpcom) :
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445 ether_delmulti(ifr, &sc->sc_arpcom);
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diff changeset
446
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diff changeset
447 if (error == ENETRESET) {
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jlarmour
parents:
diff changeset
448 /*
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jlarmour
parents:
diff changeset
449 * Multicast list has changed; set the hardware filter
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jlarmour
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diff changeset
450 * accordingly.
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diff changeset
451 */
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452 eth_drv_stop(sc); /* XXX for ds_setmcaf? */
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diff changeset
453 eth_drv_start(sc);
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454 error = 0;
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diff changeset
455 }
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456 break;
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parents:
diff changeset
457 #endif
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jlarmour
parents:
diff changeset
458
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jlarmour
parents:
diff changeset
459 default:
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diff changeset
460 error = EINVAL;
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diff changeset
461 break;
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parents:
diff changeset
462 }
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parents:
diff changeset
463
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jlarmour
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diff changeset
464 splx(s);
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diff changeset
465 return (error);
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diff changeset
466 }
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diff changeset
467
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468 //
179
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469 // Control whether any special locking needs to take place if we intend to
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diff changeset
470 // cooperate with a ROM monitor (e.g. RedBoot) using this hardware.
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471 //
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472 #if defined(CYGSEM_HAL_USE_ROM_MONITOR) && \
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473 defined(CYGSEM_HAL_VIRTUAL_VECTOR_DIAG) && \
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474 !defined(CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_COMMS)
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diff changeset
475
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diff changeset
476 // Indicate that special locking precautions are warranted.
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diff changeset
477 #define _LOCK_WITH_ROM_MONITOR
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diff changeset
478
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diff changeset
479 // This defines the [well known] channel that RedBoot will use when it is
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diff changeset
480 // using the network hardware for the debug channel.
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diff changeset
481 #define RedBoot_TCP_CHANNEL CYGNUM_HAL_VIRTUAL_VECTOR_COMM_CHANNELS
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diff changeset
482
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diff changeset
483 // Define this if you ever need to call 'diag_printf()' from interrupt level
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484 // code (ISR) and the debug channel might be using the network hardware. If
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diff changeset
485 // this is not the case, then disabling interrupts here is over-kill.
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diff changeset
486 //#define _LOCK_USING_INTERRUPTS
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diff changeset
487 #endif
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diff changeset
488
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diff changeset
489 //
115
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490 // This routine is called to start transmitting if there is data
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491 // available.
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492 //
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493 static void
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494 eth_drv_send(struct ifnet *ifp)
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495 {
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496 struct eth_drv_sc *sc = ifp->if_softc;
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497 struct eth_drv_sg sg_list[MAX_ETH_DRV_SG];
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498 int sg_len;
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499 struct mbuf *m0, *m;
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diff changeset
500 int len, total_len;
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501 unsigned char *data;
179
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diff changeset
502 #ifdef _LOCK_WITH_ROM_MONITOR
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diff changeset
503 #ifdef _LOCK_USING_INTERRUPTS
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504 cyg_uint32 ints;
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diff changeset
505 #endif
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diff changeset
506 bool need_lock = false;
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diff changeset
507 int debug_chan;
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508 #endif // _LOCK_WITH_ROM_MONITOR
115
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509
121
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diff changeset
510 // This is now only called from network threads, so no guarding is
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511 // required; locking is in place via the splfoo() mechanism already.
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diff changeset
512
115
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513 if ((ifp->if_flags & IFF_RUNNING) != IFF_RUNNING) {
121
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diff changeset
514 return;
115
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515 }
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diff changeset
516
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517 while ((sc->funs->can_send)(sc) > 0) {
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518 IF_DEQUEUE(&ifp->if_snd, m0);
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diff changeset
519 if (m0 == 0) {
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diff changeset
520 break;
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521 }
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522
126
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diff changeset
523 #ifdef CYGPKG_IO_ETH_DRIVERS_SIMULATED_FAILURES
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diff changeset
524 if ( simulate_fail( sc, SIMULATE_FAIL_SEND ) ) {
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diff changeset
525 // must free the mbufs
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diff changeset
526 m_freem(m0);
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diff changeset
527 continue; // next packet to send
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528 }
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diff changeset
529 #endif
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diff changeset
530
191
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diff changeset
531 #ifdef CYGDBG_IO_ETH_DRIVERS_DEBUG
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diff changeset
532 if (cyg_io_eth_net_debug)
115
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533 diag_printf("Sending %d bytes\n", m0->m_pkthdr.len);
191
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534 #endif
115
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535
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parents:
diff changeset
536 /* We need to use m->m_pkthdr.len, so require the header */
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parents:
diff changeset
537 if ((m0->m_flags & M_PKTHDR) == 0)
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538 panic("eth_drv_send: no header mbuf");
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diff changeset
539
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jlarmour
parents:
diff changeset
540 #if NBPFILTER > 0
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jlarmour
parents:
diff changeset
541 /* Tap off here if there is a BPF listener. */
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diff changeset
542 if (ifp->if_bpf)
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jlarmour
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diff changeset
543 bpf_mtap(ifp->if_bpf, m0);
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diff changeset
544 #endif
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diff changeset
545
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jlarmour
parents:
diff changeset
546 // Extract data pointers (don't actually move data here)
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547 sg_len = 0; total_len = 0;
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548 for (m = m0; m ; m = m->m_next) {
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549 data = mtod(m, u_char *);
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diff changeset
550 len = m->m_len;
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551 total_len += len;
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diff changeset
552 sg_list[sg_len].buf = (CYG_ADDRESS)data;
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diff changeset
553 sg_list[sg_len].len = len;
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jlarmour
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diff changeset
554 if ( len )
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555 sg_len++;
191
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parents: 188
diff changeset
556 #ifdef CYGDBG_IO_ETH_DRIVERS_DEBUG
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diff changeset
557 if (cyg_io_eth_net_debug) {
115
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558 diag_printf("xmit %d bytes at %x sg[%d]\n", len, data, sg_len);
191
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diff changeset
559 if ( cyg_io_eth_net_debug > 1)
115
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parents:
diff changeset
560 diag_dump_buf(data, len);
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561 }
191
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diff changeset
562 #endif
115
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563 if ( MAX_ETH_DRV_SG < sg_len ) {
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parents:
diff changeset
564 diag_printf("too many mbufs to tx, %d > %d\n", sg_len, MAX_ETH_DRV_SG );
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parents:
diff changeset
565 sg_len = 0;
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parents:
diff changeset
566 break; // drop it on the floor
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jlarmour
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diff changeset
567 }
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568 }
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569
179
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570 #ifdef _LOCK_WITH_ROM_MONITOR
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571 // Firm lock on this portion of the driver. Since we are about to
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572 // start messing with the actual hardware, it is imperative that the
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573 // current thread not loose control of the CPU at this time. Otherwise,
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574 // the hardware could be left in an unusable state. This caution is
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575 // only warranted if there is a possibility of some other thread trying
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576 // to use the hardware simultaneously. The network stack would prevent
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577 // this implicitly since all accesses are controlled by the "splX()"
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578 // locks, but if there is a ROM monitor, such as RedBoot, also using
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diff changeset
579 // the hardware, all bets are off.
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580
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diff changeset
581 // Note: these operations can be avoided if it were well known that
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582 // RedBoot was not using the network hardware for diagnostic I/O. This
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583 // can be inferred by checking which I/O channel RedBoot is currently
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584 // hooked to.
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585 debug_chan = CYGACC_CALL_IF_SET_DEBUG_COMM(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);
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586 if (debug_chan == RedBoot_TCP_CHANNEL) {
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587 need_lock = true;
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588 #ifdef _LOCK_USING_INTERRUPTS
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589 HAL_DISABLE_INTERRUPTS(ints);
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590 #endif
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591 cyg_drv_dsr_lock();
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592 }
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593 #endif // _LOCK_WITH_ROM_MONITOR
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594
115
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595 // Tell hardware to send this packet
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596 if ( sg_len )
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597 (sc->funs->send)(sc, sg_list, sg_len, total_len, (unsigned long)m0);
179
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598
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599 #ifdef _LOCK_WITH_ROM_MONITOR
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600 // Unlock the driver & hardware. It can once again be safely shared.
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601 if (need_lock) {
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602 cyg_drv_dsr_unlock();
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603 #ifdef _LOCK_USING_INTERRUPTS
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604 HAL_RESTORE_INTERRUPTS(ints);
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diff changeset
605 #endif
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606 }
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607 #endif // _LOCK_WITH_ROM_MONITOR
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608 #undef _LOCK_WITH_ROM_MONITOR
180
2bdd82a025e1 Quick fix for eth driver build problem
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609 }
115
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610 }
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611
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parents:
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612 //
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613 // This function is called from the hardware driver when an output operation
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614 // has completed - i.e. the packet has been sent.
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615 //
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616 static struct mbuf *mbuf_key;
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617
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618 static void
121
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619 eth_drv_tx_done(struct eth_drv_sc *sc, CYG_ADDRESS key, int status)
115
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620 {
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621 struct ifnet *ifp = &sc->sc_arpcom.ac_if;
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622 struct mbuf *m0 = (struct mbuf *)key;
177
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623 CYGARC_HAL_SAVE_GP();
147
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624
115
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625 // Check for errors here (via 'status')
147
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626 ifp->if_opackets++;
115
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627 // Done with packet
182
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628
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629 // Guard against a NULL return - can be caused by race conditions in
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630 // the driver, this is the neatest fixup:
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631 if (m0) {
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632 mbuf_key = m0;
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633 m_freem(m0);
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634 }
115
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635 // Start another if possible
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636 eth_drv_send(ifp);
177
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637 CYGARC_HAL_RESTORE_GP();
115
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638 }
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639
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640 //
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641 // This function is called from a hardware driver to indicate that an input
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642 // packet has arrived. The routine will set up appropriate network resources
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643 // (mbuf's) to hold the data and call back into the driver to retrieve the data.
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644 //
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645 static void
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646 eth_drv_recv(struct eth_drv_sc *sc, int total_len)
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647 {
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648 struct ifnet *ifp = &sc->sc_arpcom.ac_if;
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649 struct ether_header _eh, *eh=&_eh;
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650 struct mbuf *top, **mp, *m;
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651 int i, mlen;
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652 unsigned char *data;
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653 struct eth_drv_sg sg_list[MAX_ETH_DRV_SG];
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654 int sg_len;
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655
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656 if ((ifp->if_flags & IFF_RUNNING) != IFF_RUNNING) {
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657 return; // Interface not up, ignore this request
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658 }
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659
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660 CYG_ASSERT( 0 != total_len, "total_len is zero!" );
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661 CYG_ASSERT( 0 <= total_len, "total_len is negative!" );
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662 CYG_ASSERT( sizeof( struct ether_header ) <= total_len,
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663 "No ether header here!" );
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664
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665 if ( total_len < sizeof( struct ether_header ) )
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666 // Our arithmetic below would go wrong
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667 return;
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668
126
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669 #ifdef CYGPKG_IO_ETH_DRIVERS_SIMULATED_FAILURES
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670 if ( simulate_fail( sc, SIMULATE_FAIL_RECV ) ) {
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671 // there is nothing we need to do; simply do not
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672 // unload the packet
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673 ifp->if_ierrors++;
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674 return;
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675 }
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676 #endif
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677
177
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678 CYGARC_HAL_SAVE_GP(); // This is down here to make matching restore neat
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679
115
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680 /* Pull packet off interface. */
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681 MGETHDR(m, M_DONTWAIT, MT_DATA);
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682 if (m == 0) {
130
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683 #ifdef CYGPKG_IO_ETH_DRIVERS_WARN_NO_MBUFS
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684 diag_printf("warning: eth_recv out of MBUFs\n");
130
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685 #endif
115
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686 }
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687
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688 // Set up buffers
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689 // Unload ethernet header separately so IP/UDP/TCP headers are aligned
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690 sg_list[0].buf = (CYG_ADDRESS)eh;
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691 sg_list[0].len = sizeof(*eh);
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692 sg_len = 1;
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693
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694 // Compute total length (minus ethernet header)
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695 total_len -= sizeof(*eh);
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696
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697 top = 0;
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698 mlen = MHLEN;
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699 mp = &top;
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700
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701 if (m) {
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702 m->m_pkthdr.rcvif = ifp;
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703 m->m_pkthdr.len = total_len;
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704 } else {
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705 sg_list[sg_len].buf = (CYG_ADDRESS)0;
169
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706 sg_list[sg_len].len = total_len;
115
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diff changeset
707 sg_len++;
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parents:
diff changeset
708 total_len = 0;
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jlarmour
parents:
diff changeset
709 }
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jlarmour
parents:
diff changeset
710
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jlarmour
parents:
diff changeset
711 while (total_len > 0) {
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jlarmour
parents:
diff changeset
712 if (top) {
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jlarmour
parents:
diff changeset
713 MGET(m, M_DONTWAIT, MT_DATA);
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jlarmour
parents:
diff changeset
714 if (m == 0) {
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jlarmour
parents:
diff changeset
715 m_freem(top);
130
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parents: 128
diff changeset
716 #ifdef CYGPKG_IO_ETH_DRIVERS_WARN_NO_MBUFS
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diff changeset
717 diag_printf("out of MBUFs [2]");
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parents: 128
diff changeset
718 #endif
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diff changeset
719 sg_list[sg_len].buf = (CYG_ADDRESS)0;
169
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diff changeset
720 sg_list[sg_len].len = total_len;
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diff changeset
721 sg_len++;
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diff changeset
722 top = 0;
130
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diff changeset
723 break;
115
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parents:
diff changeset
724 }
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jlarmour
parents:
diff changeset
725 mlen = MLEN;
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parents:
diff changeset
726 }
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parents:
diff changeset
727 if (total_len >= MINCLSIZE) {
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jlarmour
parents:
diff changeset
728 MCLGET(m, M_DONTWAIT);
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jlarmour
parents:
diff changeset
729 if ((m->m_flags & M_EXT) == 0) {
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parents:
diff changeset
730 m_freem(top);
160
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diff changeset
731 m_free(m);
130
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diff changeset
732 #ifdef CYGPKG_IO_ETH_DRIVERS_WARN_NO_MBUFS
115
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parents:
diff changeset
733 diag_printf("warning: eth_recv out of MBUFs\n");
130
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diff changeset
734 #endif
115
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parents:
diff changeset
735 sg_list[sg_len].buf = (CYG_ADDRESS)0;
169
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diff changeset
736 sg_list[sg_len].len = total_len;
115
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parents:
diff changeset
737 sg_len++;
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jlarmour
parents:
diff changeset
738 top = 0;
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jlarmour
parents:
diff changeset
739 break;
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jlarmour
parents:
diff changeset
740 }
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jlarmour
parents:
diff changeset
741 mlen = MCLBYTES;
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jlarmour
parents:
diff changeset
742 }
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jlarmour
parents:
diff changeset
743 m->m_len = mlen = min(total_len, mlen);
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jlarmour
parents:
diff changeset
744 total_len -= mlen;
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jlarmour
parents:
diff changeset
745 data = mtod(m, caddr_t);
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jlarmour
parents:
diff changeset
746 sg_list[sg_len].buf = (CYG_ADDRESS)data;
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jlarmour
parents:
diff changeset
747 sg_list[sg_len].len = mlen;
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jlarmour
parents:
diff changeset
748 sg_len++;
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jlarmour
parents:
diff changeset
749 *mp = m;
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diff changeset
750 mp = &m->m_next;
160
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parents: 149
diff changeset
751 } // endwhile
115
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parents:
diff changeset
752
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jlarmour
parents:
diff changeset
753 // Ask hardware to unload buffers
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jlarmour
parents:
diff changeset
754 (sc->funs->recv)(sc, sg_list, sg_len);
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parents:
diff changeset
755
126
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diff changeset
756 #ifdef CYGPKG_IO_ETH_DRIVERS_SIMULATED_FAILURES
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parents: 121
diff changeset
757 if ( simulate_fail( sc, SIMULATE_FAIL_CORRUPT ) ) {
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diff changeset
758 // Corrupt the data
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diff changeset
759 simulate_fail_corrupt_sglist( sg_list, sg_len );
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parents: 121
diff changeset
760 }
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parents: 121
diff changeset
761 #endif
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diff changeset
762
191
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diff changeset
763 #ifdef CYGDBG_IO_ETH_DRIVERS_DEBUG
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diff changeset
764 if (cyg_io_eth_net_debug) {
115
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parents:
diff changeset
765 for (i = 0; i < sg_len; i++) {
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jlarmour
parents:
diff changeset
766 if (sg_list[i].buf) {
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diff changeset
767 diag_printf("rx %d bytes at %x sg[%d]\n", sg_list[i].len, sg_list[i].buf, i);
191
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diff changeset
768 if ( cyg_io_eth_net_debug > 1 )
115
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parents:
diff changeset
769 diag_dump_buf((void *)sg_list[i].buf, sg_list[i].len);
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jlarmour
parents:
diff changeset
770 }
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jlarmour
parents:
diff changeset
771 }
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parents:
diff changeset
772 }
191
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diff changeset
773 #endif
115
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parents:
diff changeset
774 m = top;
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jlarmour
parents:
diff changeset
775 if (m == 0) {
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jlarmour
parents:
diff changeset
776 ifp->if_ierrors++;
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parents:
diff changeset
777 }
177
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diff changeset
778 else {
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diff changeset
779 ifp->if_ipackets++;
115
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jlarmour
parents:
diff changeset
780
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jlarmour
parents:
diff changeset
781 #if NBPFILTER > 0
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jlarmour
parents:
diff changeset
782 #error FIXME - Need mbuf with ethernet header attached
177
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parents: 169
diff changeset
783 /*
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jlarmour
parents: 169
diff changeset
784 * Check if there's a BPF listener on this interface.
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diff changeset
785 * If so, hand off the raw packet to bpf.
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diff changeset
786 */
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diff changeset
787 if (ifp->if_bpf)
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diff changeset
788 bpf_mtap(ifp->if_bpf, m);
115
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jlarmour
parents:
diff changeset
789 #endif
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jlarmour
parents:
diff changeset
790
177
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diff changeset
791 // Push data into protocol stacks
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diff changeset
792 ether_input(ifp, eh, m);
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jlarmour
parents: 169
diff changeset
793 }
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diff changeset
794 CYGARC_HAL_RESTORE_GP();
115
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jlarmour
parents:
diff changeset
795 }
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jlarmour
parents:
diff changeset
796
121
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diff changeset
797
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diff changeset
798 // ------------------------------------------------------------------------
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jlarmour
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diff changeset
799 // DSR to schedule network delivery thread
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diff changeset
800
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diff changeset
801 extern void ecos_synch_eth_drv_dsr(void); // from ecos/timeout.c in net stack
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parents: 117
diff changeset
802
6bd9d475ed4b Merge from eCos master repository on 2000-09-04-20:50:20-BST
jlarmour
parents: 117
diff changeset
803 void
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jlarmour
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diff changeset
804 eth_drv_dsr(cyg_vector_t vector,
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diff changeset
805 cyg_ucount32 count,
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jlarmour
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diff changeset
806 cyg_addrword_t data)
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diff changeset
807 {
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diff changeset
808 struct eth_drv_sc *sc = (struct eth_drv_sc *)data;
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diff changeset
809
184
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diff changeset
810 #ifdef CYGDBG_USE_ASSERTS
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diff changeset
811 // then check that this really is a "sc"
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diff changeset
812 {
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diff changeset
813 cyg_netdevtab_entry_t *t;
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diff changeset
814 for (t = &__NETDEVTAB__[0]; t != &__NETDEVTAB_END__; t++)
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parents: 182
diff changeset
815 if ( ((struct eth_drv_sc *)t->device_instance) == sc )
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diff changeset
816 break; // found it
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diff changeset
817 CYG_ASSERT( t != &__NETDEVTAB_END__, "eth_drv_dsr: Failed to find sc in NETDEVTAB" );
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diff changeset
818 }
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diff changeset
819 #endif // Checking code
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diff changeset
820
121
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diff changeset
821 sc->state |= ETH_DRV_NEEDS_DELIVERY;
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diff changeset
822
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diff changeset
823 ecos_synch_eth_drv_dsr(); // [request] run delivery function for this dev
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parents: 117
diff changeset
824 }
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diff changeset
825
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diff changeset
826 // This is called from the delivery thread, to do just that:
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diff changeset
827 void eth_drv_run_deliveries( void )
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diff changeset
828 {
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diff changeset
829 cyg_netdevtab_entry_t *t;
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diff changeset
830 for (t = &__NETDEVTAB__[0]; t != &__NETDEVTAB_END__; t++) {
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diff changeset
831 struct eth_drv_sc *sc = (struct eth_drv_sc *)t->device_instance;
128
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parents: 126
diff changeset
832 if ( ETH_DRV_NEEDS_DELIVERY & sc->state ) {
145
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parents: 130
diff changeset
833 #if defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT)
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diff changeset
834 cyg_bool was_ctrlc_int;
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diff changeset
835 #endif
128
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diff changeset
836 sc->state &=~ETH_DRV_NEEDS_DELIVERY;
145
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diff changeset
837 #if defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT)
160
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parents: 149
diff changeset
838 was_ctrlc_int = HAL_CTRLC_CHECK((*sc->funs->int_vector)(sc), (int)sc);
145
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diff changeset
839 if (!was_ctrlc_int) // Fall through and run normal code
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parents: 130
diff changeset
840 #endif
121
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diff changeset
841 (*sc->funs->deliver)(sc);
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diff changeset
842 }
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diff changeset
843 }
6bd9d475ed4b Merge from eCos master repository on 2000-09-04-20:50:20-BST
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diff changeset
844 }
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845
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846 // This is called from the delivery thread, to unstick devices if there is
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847 // no network activity.
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848 #ifdef CYGPKG_NET_FAST_THREAD_TICKLE_DEVS
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849 void eth_drv_tickle_devices( void )
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850 {
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851 cyg_netdevtab_entry_t *t;
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852 for (t = &__NETDEVTAB__[0]; t != &__NETDEVTAB_END__; t++) {
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853 struct eth_drv_sc *sc = (struct eth_drv_sc *)t->device_instance;
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854 if ( ETH_DRV_STATE_ACTIVE & sc->state ) {
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855 struct ifnet *ifp = &sc->sc_arpcom.ac_if;
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856 // Try to dequeue a packet for this interface, if we can. This
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857 // will call can_send() for active interfaces. It is calls to
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858 // this function from tx_done() which normally provide
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859 // continuous transmissions; otherwise we do not get control.
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860 // This call fixes that.
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861 eth_drv_send(ifp);
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862 }
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863 }
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864 }
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865 #endif // CYGPKG_NET_FAST_THREAD_TICKLE_DEVS
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866
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867 // ------------------------------------------------------------------------
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868
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869 #ifdef CYGPKG_IO_PCMCIA
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870 // Lookup a 'netdev' entry, assuming that it is an ethernet device.
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871 cyg_netdevtab_entry_t *
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872 eth_drv_netdev(char *name)
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873 {
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874 cyg_netdevtab_entry_t *t;
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875 struct eth_drv_sc *sc;
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876 for (t = &__NETDEVTAB__[0]; t != &__NETDEVTAB_END__; t++) {
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877 sc = (struct eth_drv_sc *)t->device_instance;
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878 if (strcmp(sc->dev_name, name) == 0) {
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879 return t;
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880 }
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881 }
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882 return (cyg_netdevtab_entry_t *)NULL;
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883 }
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884 #endif // CYGPKG_IO_PCMCIA
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885
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886 // EOF eth_drv.c