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629 | giacomo | 1 | /* |
2 | * Project: S.Ha.R.K. |
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3 | * |
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4 | * Coordinators: |
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5 | * Giorgio Buttazzo <giorgio@sssup.it> |
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6 | * Paolo Gai <pj@gandalf.sssup.it> |
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7 | * |
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8 | * Authors : |
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9 | * Paolo Gai <pj@gandalf.sssup.it> |
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10 | * Massimiliano Giorgi <massy@gandalf.sssup.it> |
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11 | * Luca Abeni <luca@gandalf.sssup.it> |
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12 | * (see the web pages for full authors list) |
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13 | * |
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14 | * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy) |
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15 | * |
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16 | * http://www.sssup.it |
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17 | * http://retis.sssup.it |
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18 | * http://shark.sssup.it |
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19 | */ |
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20 | |||
21 | /** |
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22 | ------------ |
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636 | giacomo | 23 | CVS : $Id: eth.c,v 1.10 2004-05-11 16:03:40 giacomo Exp $ |
629 | giacomo | 24 | |
25 | File: $File$ |
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636 | giacomo | 26 | Revision: $Revision: 1.10 $ |
27 | Last update: $Date: 2004-05-11 16:03:40 $ |
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629 | giacomo | 28 | ------------ |
29 | **/ |
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30 | |||
31 | /* |
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32 | * Copyright (C) 2000 Luca Abeni |
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33 | * |
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34 | * This program is free software; you can redistribute it and/or modify |
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35 | * it under the terms of the GNU General Public License as published by |
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36 | * the Free Software Foundation; either version 2 of the License, or |
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37 | * (at your option) any later version. |
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38 | * |
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39 | * This program is distributed in the hope that it will be useful, |
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40 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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41 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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42 | * GNU General Public License for more details. |
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43 | * |
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44 | * You should have received a copy of the GNU General Public License |
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45 | * along with this program; if not, write to the Free Software |
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46 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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47 | * |
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48 | */ |
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49 | |||
50 | |||
51 | /* Author: Luca Abeni */ |
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52 | /* Date: 2/12/1997 */ |
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53 | |||
54 | /* File: eth.C */ |
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55 | /* Revision: 2.0 */ |
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56 | |||
57 | /* |
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58 | Ethernet layer: it is an inetrface between the low level driver ( |
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59 | 3Com 3c59xx, ...) and the high level protocols (IP, ARP,...). |
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60 | */ |
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61 | |||
62 | /* only 4 debug... */ |
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63 | int netlev; |
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64 | |||
65 | #include <kernel/kern.h> |
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66 | #include <modules/hartport.h> |
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67 | |||
636 | giacomo | 68 | #include <linux/pci.h> |
629 | giacomo | 69 | |
70 | #include "eth_priv.h" |
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71 | #include "netbuff.h" |
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72 | |||
73 | #include <linux/netdevice.h> |
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74 | /*#include "lowlev.h" |
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75 | //#include "3com.h" */ |
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76 | |||
77 | //#define DEBUG_ETH |
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78 | |||
79 | #define ETH_PAGE 5 |
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80 | |||
81 | struct eth_service{ |
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82 | WORD type; |
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83 | void (*rfun)(void *pkt); |
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84 | } ETH_SERVICE; |
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85 | |||
86 | int definedprotocols; |
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87 | struct eth_service eth_table[ETH_MAX_PROTOCOLS]; |
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88 | |||
89 | #define ETH_RX_BUFFERS 4 |
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90 | #define ETH_TX_BUFFERS 4 |
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91 | |||
92 | #ifndef ETH0_ADDR |
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93 | # define ETH0_ADDR 0 |
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94 | #endif |
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95 | #ifndef ETH0_IRQ |
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96 | # define ETH0_IRQ 0 |
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97 | #endif |
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98 | |||
99 | #define NONE 0 |
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100 | |||
101 | /*extern void net_handler(void); |
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102 | //extern PID net_extern_driver(void);*/ |
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103 | |||
104 | PID nettask_pid = NIL; |
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105 | static PORT NetRxPort; |
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106 | |||
107 | /* void (*vortex_send)(DWORD BaseAddress, DWORD *txbuff, int len); */ |
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108 | |||
109 | int ethIsInstalled = FALSE; |
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110 | |||
111 | /* device descriptor */ |
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112 | struct eth_device eth_dev; |
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113 | struct pci_des pci_devs[5]; |
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114 | /* This is the Linux one!!! */ |
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115 | static struct device device0 = { |
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116 | "eth0", 0, 0, 0, 0, ETH0_ADDR, ETH0_IRQ, 0, 0, 0, NULL, NULL}; |
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117 | struct device *dev_base = &device0; |
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118 | |||
119 | /* received frames buffers */ |
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120 | extern struct netbuff rxbuff; /* from skbuff.c */ |
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121 | |||
122 | /* buffers for the frames to send */ |
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123 | /* struct netbuff txbuff; */ |
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124 | |||
125 | /* Called if an unknown frames arrives */ |
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126 | void eth_nullfun(void *pkt) |
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127 | { |
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128 | kern_raise(ETH_NULLPROTOCOL_EXC,NIL); |
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129 | } |
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130 | |||
131 | void dev_tint(struct device *dev) |
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132 | { |
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133 | printk(KERN_WARNING "Warning! dev_tint called. (Why?)\n"); |
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134 | sys_abort(201); |
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135 | } |
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136 | |||
137 | /* |
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138 | ----------------------------------------------------------------------- |
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139 | The extern process calls this function when a frame arrives |
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140 | ----------------------------------------------------------------------- |
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141 | */ |
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142 | |||
143 | void netif_rx(struct sk_buff *skb) |
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144 | { |
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145 | // cprintf("DENTRO netif_rx, skbuf=%p\n",skb->data); |
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146 | if (nettask_pid == NIL) { |
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147 | printk(KERN_CRIT "Net receives packets, but the driver doesn't exist.\n"); |
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148 | sys_abort(300); |
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149 | } |
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150 | |||
151 | port_send(NetRxPort,skb,NON_BLOCK); |
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152 | // task_activate(nettask_pid); |
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153 | } |
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154 | |||
155 | TASK net_extern_driver(void) |
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156 | { |
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157 | static PORT NetPort; |
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158 | struct sk_buff skb; |
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159 | void *pkt; |
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160 | int len; |
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161 | BYTE count; |
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162 | int i; |
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163 | |||
164 | NetPort = port_connect("NetPort", sizeof(struct sk_buff), STREAM, READ); |
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165 | while (1) { |
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166 | /* debug... */ |
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167 | netlev = 1; |
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168 | |||
169 | port_receive(NetPort,&skb,BLOCK); |
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170 | pkt = skb.data; |
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171 | len = skb.len; |
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172 | |||
173 | ((struct eth_header *)pkt)->type = ntohs(((struct eth_header *)pkt)->type); |
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174 | count = 0; |
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175 | /* Search for the frame protocol...*/ |
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176 | for (i = 0; i < definedprotocols; i++) { |
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177 | /* debug... */ |
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178 | netlev = 10 + i; |
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179 | |||
180 | if (eth_table[i].type == (((struct eth_header *)pkt)->type)) { |
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181 | count++; |
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182 | /*...and call the protocol CallBack!!! */ |
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183 | eth_table[i].rfun(pkt); |
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184 | } |
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185 | } |
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186 | |||
187 | /* debug... */ |
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188 | netlev = 20; |
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189 | |||
190 | // cprintf("ETH: releasing %p\n", pkt); |
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191 | |||
192 | // NOTE changed by PJ because skb.data not always point to the |
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193 | // buffer start!!!... it is skb.head that always points there! |
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194 | netbuff_release(&rxbuff, skb.head); |
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195 | |||
196 | /* debug... */ |
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197 | netlev = 30; |
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198 | } |
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199 | } |
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200 | |||
201 | /* |
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202 | -------------------- |
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203 | Interface functions |
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204 | -------------------- |
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205 | */ |
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206 | /* formatted print of an ethernet header */ |
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207 | void eth_printHeader(struct eth_header *p) |
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208 | { |
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209 | cprintf("Dest : %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x \n",p->dest.ad[0], |
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210 | p->dest.ad[1], |
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211 | p->dest.ad[2], |
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212 | p->dest.ad[3], |
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213 | p->dest.ad[4], |
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214 | p->dest.ad[5]); |
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215 | cprintf("Source : %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x \n",p->source.ad[0], |
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216 | p->source.ad[1], |
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217 | p->source.ad[2], |
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218 | p->source.ad[3], |
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219 | p->source.ad[4], |
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220 | p->source.ad[5]); |
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221 | cprintf("Type : %x\n",p->type); |
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222 | } |
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223 | |||
224 | void eth_showinfo(struct eth_device *d) |
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225 | { |
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226 | cprintf("IntLine : %d\n",d->IntLine); |
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227 | cprintf("BaseAddress : %lx\n",d->BaseAddress); |
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228 | cprintf("Address : %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n", |
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229 | d->addr.ad[0],d->addr.ad[1],d->addr.ad[2], |
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230 | d->addr.ad[3],d->addr.ad[4],d->addr.ad[5]); |
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231 | } |
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232 | |||
233 | /* formatted print of an ethernet frame*/ |
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234 | void eth_printPkt(char *pkt,int len) |
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235 | { |
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236 | int i,j,offset; |
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237 | |||
238 | eth_printHeader((struct eth_header *)pkt); |
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239 | offset = sizeof(struct eth_header); |
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240 | len -= offset; |
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241 | for (i = 0; i < len; i += 10) { |
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242 | for (j = 0; j < 10; j++) |
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243 | cprintf("%2.2x ", pkt[offset+i+j]); |
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244 | for (j = 0; j < 10; j++) |
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245 | cputc(pkt[offset+i+j]); |
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246 | cprintf("\n"); |
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247 | } |
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248 | cprintf("\n"); |
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249 | } |
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250 | |||
251 | void eth_copy_and_sum(struct sk_buff *dest, unsigned char *src, int length, int base) |
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252 | { |
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253 | memcpy(dest->data, src, length); |
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254 | } |
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255 | |||
256 | #if 0 |
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257 | /*-------------------- User Interface -----------------------------*/ |
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258 | unsigned short htons(unsigned short host) |
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259 | { |
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260 | return ((host & 0xff00) >> 8) + ((host & 0x00ff) << 8); |
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261 | } |
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262 | |||
263 | unsigned short ntohs(unsigned short host) |
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264 | { |
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265 | return ((host & 0xff00) >> 8) + ((host & 0x00ff) << 8); |
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266 | } |
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267 | #endif |
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268 | |||
269 | /* |
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270 | Translate an ethernet address from a text string to an eth_addr |
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271 | structure |
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272 | */ |
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273 | void eth_str2Addr(char *add, struct eth_addr *ds) |
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274 | { |
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275 | int ad[6]; |
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276 | int i,j; |
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277 | char c; |
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278 | |||
279 | i = 0; |
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280 | for(j = 0; j < 6; j++) { |
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281 | ad[j] = 0; |
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282 | while((add[i] != ':') && (add[i] != 0)) { |
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283 | c = add[i++]; |
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284 | if (c <= '9') c = c - '0'; |
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285 | else c = c - 'A' + 10; |
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286 | ad[j] = ad[j] * 16 + c; |
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287 | } |
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288 | i++; |
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289 | } |
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290 | for (i=0; i<6; i++) ds->ad[i] = ad[i]; |
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291 | } |
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292 | |||
293 | /* Set a higher level protocol's CallBack */ |
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294 | int eth_setProtocol(WORD type, void (*recv)(void *pkt)) |
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295 | { |
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296 | int i; |
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297 | |||
298 | if (definedprotocols == ETH_MAX_PROTOCOLS) return FALSE; |
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299 | for(i = 0; i < definedprotocols; i++) { |
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300 | if (eth_table[i].type == type) return FALSE; |
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301 | } |
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302 | eth_table[definedprotocols].type = type; |
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303 | eth_table[definedprotocols++].rfun = recv; |
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304 | |||
305 | return TRUE; |
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306 | } |
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307 | |||
308 | /* Fill an ethernet frame's header and return a pointer to the frame's body */ |
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309 | void *eth_setHeader(void *b,struct eth_addr dest, WORD type) |
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310 | { |
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311 | setEthAddr(((struct eth_header *)b)->dest,dest); |
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312 | setEthAddr(((struct eth_header *)b)->source,eth_dev.addr); |
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313 | /* the type field is in big-endian format */ |
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314 | ((struct eth_header *) b)->type = htons(type); |
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315 | |||
316 | return((BYTE *)b + sizeof(struct eth_header)); |
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317 | } |
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318 | |||
319 | /* getFirstDataByte : Return a pointer to the body of an ethernet frame */ |
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320 | void *eth_getFDB(void *p) |
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321 | { |
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322 | return ((void *)((BYTE *)p + sizeof(struct eth_header))); |
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323 | } |
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324 | |||
325 | /* eth_getAddress : return the local ethernet address */ |
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326 | void eth_getAddress(struct eth_addr *eth) |
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327 | { |
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328 | memcpy(eth->ad,&(device0.dev_addr),sizeof(struct eth_addr)); |
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329 | } |
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330 | |||
331 | /* Send an ethernet frame */ |
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332 | int eth_sendPkt(void *p, int len) |
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333 | { |
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334 | int i; |
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335 | int l; |
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336 | struct sk_buff buff; |
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337 | |||
338 | l = len + sizeof(struct eth_header); |
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339 | if (l < 60) { |
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340 | for (i = l; i <= 60; i++) *((BYTE *)p + i) = 0; |
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341 | l = 60; |
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342 | } |
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343 | buff.len = l; |
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344 | buff.data = p; |
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345 | device0.hard_start_xmit(&buff, &device0); |
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346 | /* lowlev_send(eth_dev.BaseAddress, p, l); */ |
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347 | |||
348 | return TRUE; |
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349 | } |
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350 | |||
351 | int eth_exc(int err) |
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352 | { |
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353 | int p; |
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354 | |||
355 | if (err != ETH_BUFFERS_FULL) printk(KERN_ERR "Ethernet : "); |
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356 | switch (err) { |
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357 | case ETH_DRIVER_NOT_FOUND : |
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358 | printk(KERN_ERR "NET PANIC --> Etherlink not found.\n"); |
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359 | return 0; |
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360 | case ETH_RXERROR : |
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361 | printk(KERN_ERR "Receive error.\n"); |
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362 | return 0; |
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363 | case ETH_TXERROR : |
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364 | printk(KERN_ERR "Transimit error: N. Max Retry.\n"); |
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365 | return 0; |
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366 | case ETH_PROTOCOL_ERROR : |
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367 | printk(KERN_ERR "Too much protocols.\n"); |
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368 | return 0; |
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369 | case ETH_BUFFERS_FULL: |
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370 | printk(KERN_ERR "Buffers full: frame lost!\n"); |
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371 | return 1; |
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372 | case ETH_NULLPROTOCOL_EXC: |
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373 | printk(KERN_ERR "Null protocol called!\n"); |
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374 | for (p = 0; p < ETH_MAX_PROTOCOLS; p++) { |
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375 | printk(KERN_ERR "%d: %d\n", p, eth_table[p].type); |
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376 | } |
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377 | return 0; |
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378 | default : |
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379 | return 1; |
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380 | } |
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381 | } |
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382 | |||
383 | void skb_init(void); |
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384 | void linuxpci_init(void); |
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385 | int rtl8139_probe(struct device *dev); |
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386 | int tc59x_probe(struct device *dev); |
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387 | int eepro100_probe(struct device *dev); |
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388 | int el3_probe(struct device *dev); |
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389 | int ne_probe(struct device *dev); |
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390 | |||
391 | int eth_init(int mode, TASK_MODEL *m) |
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392 | { |
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393 | SOFT_TASK_MODEL m_soft; |
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394 | int i; |
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395 | #if 0 |
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396 | ndev; |
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397 | WORD Class; |
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398 | struct pci_regs *r; |
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399 | PID p; |
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400 | |||
401 | #endif |
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402 | |||
403 | BYTE cardtype; |
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404 | int linux_found = 0; |
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405 | |||
406 | if (!ethIsInstalled) { |
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407 | /* Scan the devices connected to the PCI bus */ |
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408 | cardtype = NONE; |
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409 | |||
410 | skb_init(); |
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411 | NetRxPort = port_create("NetPort",sizeof(struct sk_buff),50,STREAM,WRITE); |
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412 | if (!m) { |
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413 | soft_task_default_model(m_soft); |
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414 | soft_task_def_wcet(m_soft, 1000); |
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415 | soft_task_def_period(m_soft,20000); |
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416 | soft_task_def_met(m_soft, 1000); |
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417 | soft_task_def_aperiodic(m_soft); |
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418 | soft_task_def_system(m_soft); |
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419 | soft_task_def_nokill(m_soft); |
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420 | m = (TASK_MODEL *)&m_soft; |
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421 | } |
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422 | |||
423 | nettask_pid = task_create("rxProc", net_extern_driver, m, NULL); |
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424 | if (nettask_pid == NIL) { |
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425 | printk(KERN_ERR "Can't create extern driver.\n"); |
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426 | return 0; |
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427 | } |
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428 | task_activate(nettask_pid); |
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429 | |||
430 | if (1) { //!!!if (pci_init() == 1) { |
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431 | linuxpci_init(); |
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432 | #ifdef DEBUG_ETH |
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433 | printk(KERN_DEBUG "LF %d\n", linux_found); |
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434 | #endif |
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435 | linux_found += (rtl8139_probe(&device0) == 0); |
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436 | #ifdef DEBUG_ETH |
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437 | printk(KERN_DEBUG "LF %d\n", linux_found); |
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438 | #endif |
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439 | linux_found += (tc59x_probe(&device0) == 0); |
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440 | #ifdef DEBUG_ETH |
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441 | printk(KERN_DEBUG "LF %d\n", linux_found); |
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442 | #endif |
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443 | linux_found += (eepro100_probe(&device0) == 0); |
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444 | #ifdef DEBUG_ETH |
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445 | printk(KERN_DEBUG "LF %d\n", linux_found); |
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446 | #endif |
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447 | |||
448 | |||
449 | #if 0 |
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450 | ndev = pci_scan_bus(pci_devs); |
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451 | #ifdef __ETH_DBG__ |
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452 | pci_show(pci_devs, ndev); |
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453 | #endif |
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454 | for (i = 0; i < ndev; i++) { |
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455 | r = (struct pci_regs *) pci_devs[i].mem; |
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456 | Class = r->ClassCode; |
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457 | /* Is there a network card? */ |
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458 | if (Class == 0x0200) { |
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459 | if (cardtype == NONE) { |
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460 | cardtype = UNKNOWN; |
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461 | } |
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462 | /* is it a 3COM card? */ |
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463 | if (r->VendorId == 0x10b7) { |
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464 | /* YES!!!!!! */ |
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465 | lowlev_info = vortex_info; |
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466 | lowlev_readregs = vortex_readregs; |
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467 | lowlev_open = vortex_open; |
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468 | lowlev_close = vortex_close; |
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469 | if (mode == TXTASK) { |
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470 | lowlev_send = vortex_send_msg; |
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471 | } else { |
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472 | lowlev_send = vortex_send_mem; |
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473 | } |
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474 | printk(KERN_INFO "PCI Ethlink card found:\n"); |
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475 | lowlev_info(r); |
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476 | cardtype = VORTEX; |
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477 | } |
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478 | } |
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479 | } |
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480 | } |
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481 | if ((cardtype == NONE) || (cardtype == UNKNOWN)) { |
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482 | exc_raise(ETH_DRIVER_NOT_FOUND); |
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483 | } |
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484 | /*PUT HERE THE PFUN INIT!!!*/ |
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485 | if (cardtype == VORTEX) { |
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486 | } |
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487 | /* |
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488 | Use it if you want to see the value of the internal |
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489 | registers of the card |
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490 | */ |
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491 | /*vortex_readregs(eth_dev.BaseAddress);*/ |
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492 | |||
493 | p = lowlev_open(eth_dev.BaseAddress, mode); |
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494 | |||
495 | /* Set the Fast Handler and the external process */ |
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496 | handler_set(eth_dev.IntLine, net_handler, p); |
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497 | #else |
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498 | } |
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499 | if (linux_found == 0) { |
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500 | linux_found += (el3_probe(&device0) == 0); |
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501 | #ifdef DEBUG_ETH |
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502 | printk(KERN_DEBUG "LF %d\n", linux_found); |
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503 | #endif |
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504 | linux_found += (ne_probe(&device0) == 0); |
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505 | #ifdef DEBUG_ETH |
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506 | printk(KERN_DEBUG "LF %d\n", linux_found); |
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507 | #endif |
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508 | linux_found += (NS8390_init(&device0, 1) == 0); |
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509 | #ifdef DEBUG_ETH |
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510 | printk(KERN_DEBUG "LF %d\n", linux_found); |
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511 | #endif |
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512 | } |
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513 | |||
514 | /* |
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515 | if (mode & LOOPBACK) { |
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516 | cprintf("Installing loopback device (forced)\n"); |
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517 | loopback_init(&device0); |
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518 | } |
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519 | */ |
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520 | if (linux_found) { |
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521 | device0.open(&device0); |
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522 | printk(KERN_INFO "Network card found.\n"); |
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523 | } else { |
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524 | printk(KERN_INFO "No network card found.\n"); |
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525 | /* cprintf("No network card found. Installing loopback device.\n"); |
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526 | loopback_init(&device0); |
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527 | device0.open(&device0);*/ |
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528 | return 0; |
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529 | } |
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530 | #endif |
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531 | |||
532 | //netbuff_init(&rxbuff, ETH_RX_BUFFERS, ETH_MAX_LEN); |
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533 | //netbuff_init(&txbuff, ETH_TX_BUFFERS, ETH_MAX_LEN); |
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534 | |||
535 | definedprotocols = 0; |
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536 | for (i = 0; i < ETH_MAX_PROTOCOLS; i++) { |
||
537 | eth_table[i].type = 0; |
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538 | eth_table[i].rfun = eth_nullfun; |
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539 | } |
||
540 | ethIsInstalled = TRUE; |
||
541 | /* Don't crash the system at the exit, please :) */ |
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542 | sys_atrunlevel(eth_close,NULL,RUNLEVEL_BEFORE_EXIT); |
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543 | |||
544 | } else { |
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545 | printk(KERN_INFO "Ethernet already installed.\n"); |
||
546 | return 0; |
||
547 | } |
||
548 | return 1; |
||
549 | } |
||
550 | |||
551 | void eth_close(void *a) |
||
552 | { |
||
553 | #ifdef DEBUG_ETH |
||
554 | printk(KERN_DEBUG "Network Closing.\n"); |
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555 | #endif |
||
556 | if (ethIsInstalled == TRUE) { |
||
557 | device0.stop(&device0); |
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558 | /* This seems to break everithing... */ |
||
559 | // lowlev_close(eth_dev.BaseAddress); |
||
560 | ethIsInstalled = FALSE; |
||
561 | } |
||
562 | #ifdef DEBUG_ETH |
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563 | printk(KERN_DEBUG "Network Closed.\n"); |
||
564 | #endif |
||
565 | } |