1 | /* |
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2 | * RTEMS/TCPIP driver for MPC860 SCC1 Ethernet |
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3 | * |
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4 | * Modified for MPC860 by Jay Monkman (jmonkman@frasca.com) |
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5 | * |
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6 | * This supports ethernet on either SCC1 or the FEC of the MPC860T. |
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7 | * Right now, we only do 10 Mbps, even with the FEC. The function |
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8 | * rtems_m860_enet_driver_attach determines which one to use. Currently, |
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9 | * only one may be used at a time. |
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10 | * |
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11 | * W. Eric Norum |
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12 | * Saskatchewan Accelerator Laboratory |
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13 | * University of Saskatchewan |
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14 | * Saskatoon, Saskatchewan, CANADA |
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15 | * eric@skatter.usask.ca |
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16 | * |
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17 | * $Id$ |
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18 | */ |
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19 | #include <bsp.h> |
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20 | #include <mpc860.h> |
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21 | #include <stdio.h> |
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22 | #include <rtems/error.h> |
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23 | #include <rtems/rtems_bsdnet.h> |
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24 | |
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25 | #include <sys/param.h> |
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26 | #include <sys/mbuf.h> |
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27 | #include <sys/socket.h> |
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28 | #include <sys/sockio.h> |
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29 | |
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30 | #include <net/if.h> |
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31 | |
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32 | #include <netinet/in.h> |
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33 | #include <netinet/if_ether.h> |
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34 | |
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35 | /* |
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36 | * Number of interfaces supported by this driver |
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37 | */ |
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38 | #define NIFACES 1 |
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39 | |
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40 | /* |
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41 | * Default number of buffer descriptors set aside for this driver. |
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42 | * The number of transmit buffer descriptors has to be quite large |
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43 | * since a single frame often uses four or more buffer descriptors. |
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44 | */ |
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45 | #define RX_BUF_COUNT 32 |
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46 | #define TX_BUF_COUNT 8 |
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47 | #define TX_BD_PER_BUF 4 |
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48 | |
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49 | /* |
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50 | * RTEMS event used by interrupt handler to signal daemons. |
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51 | * This must *not* be the same event used by the TCP/IP task synchronization. |
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52 | */ |
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53 | #define INTERRUPT_EVENT RTEMS_EVENT_1 |
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54 | |
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55 | /* |
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56 | * RTEMS event used to start transmit daemon. |
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57 | * This must not be the same as INTERRUPT_EVENT. |
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58 | */ |
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59 | #define START_TRANSMIT_EVENT RTEMS_EVENT_2 |
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60 | |
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61 | /* |
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62 | * Receive buffer size -- Allow for a full ethernet packet plus a pointer |
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63 | */ |
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64 | #define RBUF_SIZE 1520 |
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65 | |
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66 | #if (MCLBYTES < RBUF_SIZE) |
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67 | # error "Driver must have MCLBYTES > RBUF_SIZE" |
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68 | #endif |
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69 | |
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70 | /* |
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71 | * Per-device data |
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72 | */ |
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73 | struct m860_enet_struct { |
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74 | struct arpcom arpcom; |
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75 | struct mbuf **rxMbuf; |
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76 | struct mbuf **txMbuf; |
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77 | int acceptBroadcast; |
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78 | int rxBdCount; |
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79 | int txBdCount; |
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80 | int txBdHead; |
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81 | int txBdTail; |
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82 | int txBdActiveCount; |
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83 | m860BufferDescriptor_t *rxBdBase; |
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84 | m860BufferDescriptor_t *txBdBase; |
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85 | rtems_id rxDaemonTid; |
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86 | rtems_id txDaemonTid; |
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87 | |
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88 | /* |
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89 | * Statistics |
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90 | */ |
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91 | unsigned long rxInterrupts; |
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92 | unsigned long rxNotFirst; |
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93 | unsigned long rxNotLast; |
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94 | unsigned long rxGiant; |
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95 | unsigned long rxNonOctet; |
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96 | unsigned long rxRunt; |
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97 | unsigned long rxBadCRC; |
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98 | unsigned long rxOverrun; |
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99 | unsigned long rxCollision; |
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100 | |
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101 | unsigned long txInterrupts; |
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102 | unsigned long txDeferred; |
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103 | unsigned long txHeartbeat; |
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104 | unsigned long txLateCollision; |
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105 | unsigned long txRetryLimit; |
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106 | unsigned long txUnderrun; |
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107 | unsigned long txLostCarrier; |
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108 | unsigned long txRawWait; |
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109 | }; |
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110 | static struct m860_enet_struct enet_driver[NIFACES]; |
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111 | |
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112 | /* |
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113 | * SCC1 interrupt handler |
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114 | */ |
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115 | static rtems_isr |
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116 | m860_scc1_interrupt_handler (rtems_vector_number v) |
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117 | { |
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118 | /* |
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119 | * Frame received? |
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120 | */ |
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121 | if ((m860.scc1.sccm & 0x8) && (m860.scc1.scce & 0x8)) { |
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122 | m860.scc1.scce = 0x8; |
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123 | /* I don't think the next line is needed. It was in |
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124 | * the 68360 stuff, though. |
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125 | * m860.scc1.sccm &= ~0x8; |
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126 | */ |
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127 | enet_driver[0].rxInterrupts++; |
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128 | rtems_event_send (enet_driver[0].rxDaemonTid, INTERRUPT_EVENT); |
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129 | } |
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130 | |
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131 | /* |
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132 | * Buffer transmitted or transmitter error? |
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133 | */ |
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134 | if ((m860.scc1.sccm & 0x12) && (m860.scc1.scce & 0x12)) { |
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135 | m860.scc1.scce = 0x12; |
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136 | /* I don't think the next line is needed. It was in |
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137 | * the 68360 stuff, though. |
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138 | * m860.scc1.sccm &= ~0x12; |
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139 | */ |
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140 | enet_driver[0].txInterrupts++; |
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141 | rtems_event_send (enet_driver[0].txDaemonTid, INTERRUPT_EVENT); |
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142 | } |
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143 | m860.cisr = 1UL << 30; /* Clear SCC1 interrupt-in-service bit */ |
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144 | } |
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145 | |
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146 | /* |
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147 | * FEC interrupt handler |
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148 | */ |
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149 | static rtems_isr |
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150 | m860_fec_interrupt_handler (rtems_vector_number v) |
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151 | { |
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152 | /* |
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153 | * Frame received? |
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154 | */ |
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155 | if (m860.fec.ievent & M860_FEC_IEVENT_RFINT) { |
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156 | m860.fec.ievent = M860_FEC_IEVENT_RFINT; |
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157 | enet_driver[0].rxInterrupts++; |
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158 | rtems_event_send (enet_driver[0].rxDaemonTid, INTERRUPT_EVENT); |
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159 | } |
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160 | |
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161 | /* |
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162 | * Buffer transmitted or transmitter error? |
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163 | */ |
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164 | if (m860.fec.ievent & M860_FEC_IEVENT_TFINT) { |
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165 | m860.fec.ievent = M860_FEC_IEVENT_TFINT; |
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166 | enet_driver[0].txInterrupts++; |
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167 | rtems_event_send (enet_driver[0].txDaemonTid, INTERRUPT_EVENT); |
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168 | } |
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169 | } |
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170 | |
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171 | /* |
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172 | * Initialize the ethernet hardware |
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173 | */ |
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174 | static void |
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175 | m860_scc_initialize_hardware (struct m860_enet_struct *sc) |
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176 | { |
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177 | int i; |
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178 | unsigned char *hwaddr; |
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179 | rtems_status_code status; |
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180 | rtems_isr_entry old_handler; |
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181 | |
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182 | /* |
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183 | * Configure port A CLK1, CLK2, TXD1 and RXD1 pins |
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184 | */ |
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185 | m860.papar |= 0x303; |
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186 | m860.padir &= ~0x303; |
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187 | m860.paodr &= ~0x303; |
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188 | |
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189 | /* |
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190 | * Configure port C CTS1* and CD1* pins, and PC4-PC7 |
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191 | * |
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192 | */ |
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193 | m860.pcpar &= ~0x30; |
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194 | m860.pcdir |= 0x0f00; |
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195 | m860.pcdir &= ~0x30; |
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196 | m860.pcso |= 0x30; |
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197 | m860.pcdat &= ~0x0f00; /* Clear LOOP */ |
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198 | m860.pcdat |= 0x0700; /* Set FULDL, TPSQEL, TPAPCE */ |
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199 | |
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200 | /* |
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201 | * Connect CLK1 and CLK2 to SCC1 |
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202 | */ |
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203 | m860.sicr &= ~0xFF; |
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204 | m860.sicr |= (5 << 3) | 4; |
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205 | |
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206 | /* |
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207 | * Initialize SDMA configuration register |
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208 | */ |
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209 | m860.sdcr = 1; |
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210 | |
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211 | /* |
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212 | * Allocate mbuf pointers |
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213 | */ |
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214 | sc->rxMbuf = malloc (sc->rxBdCount * sizeof *sc->rxMbuf, |
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215 | M_MBUF, M_NOWAIT); |
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216 | sc->txMbuf = malloc (sc->txBdCount * sizeof *sc->txMbuf, |
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217 | M_MBUF, M_NOWAIT); |
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218 | if (!sc->rxMbuf || !sc->txMbuf) |
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219 | rtems_panic ("No memory for mbuf pointers"); |
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220 | |
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221 | /* |
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222 | * Set receiver and transmitter buffer descriptor bases |
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223 | */ |
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224 | sc->rxBdBase = M860AllocateBufferDescriptors(sc->rxBdCount); |
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225 | sc->txBdBase = M860AllocateBufferDescriptors(sc->txBdCount); |
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226 | m860.scc1p.rbase = (char *)sc->rxBdBase - (char *)&m860; |
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227 | m860.scc1p.tbase = (char *)sc->txBdBase - (char *)&m860; |
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228 | |
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229 | /* |
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230 | * Send "Init parameters" command |
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231 | */ |
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232 | M860ExecuteRISC (M860_CR_OP_INIT_RX_TX | M860_CR_CHAN_SCC1); |
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233 | |
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234 | /* |
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235 | * Set receive and transmit function codes |
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236 | */ |
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237 | m860.scc1p.rfcr = M860_RFCR_MOT | M860_RFCR_DMA_SPACE(0); |
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238 | m860.scc1p.tfcr = M860_TFCR_MOT | M860_TFCR_DMA_SPACE(0); |
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239 | |
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240 | /* |
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241 | * Set maximum receive buffer length |
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242 | */ |
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243 | m860.scc1p.mrblr = RBUF_SIZE; |
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244 | |
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245 | /* |
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246 | * Set CRC parameters |
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247 | */ |
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248 | m860.scc1p.un.ethernet.c_pres = 0xFFFFFFFF; |
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249 | m860.scc1p.un.ethernet.c_mask = 0xDEBB20E3; |
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250 | |
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251 | /* |
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252 | * Clear diagnostic counters |
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253 | */ |
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254 | m860.scc1p.un.ethernet.crcec = 0; |
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255 | m860.scc1p.un.ethernet.alec = 0; |
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256 | m860.scc1p.un.ethernet.disfc = 0; |
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257 | |
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258 | /* |
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259 | * Set pad value |
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260 | */ |
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261 | m860.scc1p.un.ethernet.pads = 0x8888; |
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262 | |
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263 | /* |
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264 | * Set retry limit |
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265 | */ |
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266 | m860.scc1p.un.ethernet.ret_lim = 15; |
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267 | |
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268 | /* |
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269 | * Set maximum and minimum frame length |
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270 | */ |
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271 | m860.scc1p.un.ethernet.mflr = 1518; |
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272 | m860.scc1p.un.ethernet.minflr = 64; |
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273 | m860.scc1p.un.ethernet.maxd1 = RBUF_SIZE; |
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274 | m860.scc1p.un.ethernet.maxd2 = RBUF_SIZE; |
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275 | |
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276 | /* |
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277 | * Clear group address hash table |
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278 | */ |
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279 | m860.scc1p.un.ethernet.gaddr1 = 0; |
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280 | m860.scc1p.un.ethernet.gaddr2 = 0; |
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281 | m860.scc1p.un.ethernet.gaddr3 = 0; |
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282 | m860.scc1p.un.ethernet.gaddr4 = 0; |
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283 | |
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284 | /* |
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285 | * Set our physical address |
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286 | */ |
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287 | hwaddr = sc->arpcom.ac_enaddr; |
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288 | |
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289 | m860.scc1p.un.ethernet.paddr_h = (hwaddr[5] << 8) | hwaddr[4]; |
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290 | m860.scc1p.un.ethernet.paddr_m = (hwaddr[3] << 8) | hwaddr[2]; |
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291 | m860.scc1p.un.ethernet.paddr_l = (hwaddr[1] << 8) | hwaddr[0]; |
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292 | |
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293 | /* |
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294 | * Aggressive retry |
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295 | */ |
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296 | m860.scc1p.un.ethernet.p_per = 0; |
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297 | |
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298 | /* |
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299 | * Clear individual address hash table |
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300 | */ |
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301 | m860.scc1p.un.ethernet.iaddr1 = 0; |
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302 | m860.scc1p.un.ethernet.iaddr2 = 0; |
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303 | m860.scc1p.un.ethernet.iaddr3 = 0; |
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304 | m860.scc1p.un.ethernet.iaddr4 = 0; |
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305 | |
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306 | /* |
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307 | * Clear temp address |
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308 | */ |
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309 | m860.scc1p.un.ethernet.taddr_l = 0; |
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310 | m860.scc1p.un.ethernet.taddr_m = 0; |
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311 | m860.scc1p.un.ethernet.taddr_h = 0; |
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312 | |
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313 | /* |
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314 | * Set up receive buffer descriptors |
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315 | */ |
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316 | for (i = 0 ; i < sc->rxBdCount ; i++) { |
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317 | (sc->rxBdBase + i)->status = 0; |
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318 | } |
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319 | |
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320 | /* |
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321 | * Set up transmit buffer descriptors |
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322 | */ |
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323 | for (i = 0 ; i < sc->txBdCount ; i++) { |
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324 | (sc->txBdBase + i)->status = 0; |
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325 | sc->txMbuf[i] = NULL; |
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326 | } |
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327 | sc->txBdHead = sc->txBdTail = 0; |
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328 | sc->txBdActiveCount = 0; |
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329 | |
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330 | /* |
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331 | * Clear any outstanding events |
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332 | */ |
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333 | m860.scc1.scce = 0xFFFF; |
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334 | |
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335 | /* |
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336 | * Set up interrupts |
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337 | */ |
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338 | status = rtems_interrupt_catch (m860_scc1_interrupt_handler, |
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339 | PPC_IRQ_CPM_SCC1, |
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340 | &old_handler); |
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341 | if (status != RTEMS_SUCCESSFUL) { |
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342 | rtems_panic ("Can't attach M860 SCC1 interrupt handler: %s\n", |
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343 | rtems_status_text (status)); |
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344 | } |
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345 | m860.scc1.sccm = 0; /* No interrupts unmasked till necessary */ |
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346 | m860.cimr |= (1UL << 30); /* Enable SCC1 interrupt */ |
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347 | |
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348 | /* |
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349 | * Set up General SCC Mode Register |
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350 | * Ethernet configuration |
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351 | */ |
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352 | m860.scc1.gsmr_h = 0x0; |
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353 | m860.scc1.gsmr_l = 0x1088000c; |
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354 | |
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355 | /* |
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356 | * Set up data synchronization register |
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357 | * Ethernet synchronization pattern |
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358 | */ |
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359 | m860.scc1.dsr = 0xd555; |
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360 | |
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361 | /* |
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362 | * Set up protocol-specific mode register |
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363 | * No Heartbeat check |
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364 | * No force collision |
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365 | * Discard short frames |
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366 | * Individual address mode |
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367 | * Ethernet CRC |
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368 | * Not promisuous |
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369 | * Ignore/accept broadcast packets as specified |
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370 | * Normal backoff timer |
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371 | * No loopback |
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372 | * No input sample at end of frame |
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373 | * 64-byte limit for late collision |
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374 | * Wait 22 bits before looking for start of frame delimiter |
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375 | * Disable full-duplex operation |
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376 | */ |
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377 | m860.scc1.psmr = 0x080A | (sc->acceptBroadcast ? 0 : 0x100); |
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378 | |
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379 | /* |
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380 | * Enable the TENA (RTS1*) pin |
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381 | */ |
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382 | m860.pcpar |= 0x1; |
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383 | m860.pcdir &= ~0x1; |
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384 | |
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385 | |
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386 | /* |
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387 | * Set up interrupts |
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388 | * FIXME: DANGER: WARNING: |
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389 | * CICR and SIMASK must be set in any module that uses |
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390 | * the CPM. Currently those are console-generic.c and |
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391 | * network.c. If the registers are not set the same |
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392 | * in both places, strange things may happen. |
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393 | * If they are only set in one place, then an application |
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394 | * that used the other module won't work correctly. |
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395 | * Put this comment in each module that sets these 2 registers |
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396 | */ |
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397 | m860.cicr = 0x00e43e80; /* SCaP=SCC1, SCbP=SCC2, SCcP=SCC3, |
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398 | SCdP=SCC4, IRL=1, HP=SCC1, IEN=1 */ |
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399 | m860.simask |= M860_SIMASK_LVM1; |
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400 | |
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401 | /* |
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402 | * Enable receiver and transmitter |
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403 | */ |
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404 | m860.scc1.gsmr_l = 0x1088003c; |
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405 | } |
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406 | |
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407 | static void |
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408 | m860_fec_initialize_hardware (struct m860_enet_struct *sc) |
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409 | { |
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410 | int i; |
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411 | unsigned char *hwaddr; |
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412 | rtems_status_code status; |
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413 | rtems_isr_entry old_handler; |
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414 | |
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415 | /* |
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416 | * Issue reset to FEC |
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417 | */ |
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418 | m860.fec.ecntrl=0x1; |
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419 | |
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420 | /* |
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421 | * Put ethernet transciever in reset |
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422 | */ |
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423 | m860.pgcra |= 0x80; |
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424 | |
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425 | /* |
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426 | * Configure I/O ports |
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427 | */ |
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428 | m860.pdpar = 0x1fff; |
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429 | m860.pddir = 0x1c58; |
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430 | |
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431 | /* |
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432 | * Take ethernet transciever out of reset |
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433 | */ |
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434 | m860.pgcra &= ~0x80; |
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435 | |
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436 | |
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437 | /* |
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438 | * Set SIU interrupt level to LVL2 |
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439 | * |
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440 | */ |
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441 | m860.fec.ivec = 0x02 << 29; |
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442 | |
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443 | /* |
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444 | * Set the TX and RX fifo sizes. For now, we'll split it evenly |
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445 | */ |
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446 | /* If you uncomment these, the FEC will not work right. |
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447 | m860.fec.r_fstart = ((m860.fec.r_bound & 0x3ff) >> 2) & 0x3ff; |
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448 | m860.fec.x_fstart = 0; |
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449 | */ |
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450 | |
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451 | /* |
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452 | * Set our physical address |
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453 | */ |
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454 | hwaddr = sc->arpcom.ac_enaddr; |
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455 | |
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456 | m860.fec.addr_low = (hwaddr[0] << 24) | (hwaddr[1] << 16) | |
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457 | (hwaddr[2] << 8) | (hwaddr[3] << 0); |
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458 | m860.fec.addr_high = (hwaddr[4] << 24) | (hwaddr[5] << 16); |
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459 | |
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460 | /* |
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461 | * Clear the hash table |
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462 | */ |
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463 | m860.fec.hash_table_high = 0; |
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464 | m860.fec.hash_table_low = 0; |
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465 | |
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466 | /* |
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467 | * Set up receive buffer size |
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468 | */ |
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469 | m860.fec.r_buf_size = 0x5f0; /* set to 1520 */ |
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470 | |
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471 | /* |
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472 | * Allocate mbuf pointers |
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473 | */ |
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474 | sc->rxMbuf = malloc (sc->rxBdCount * sizeof *sc->rxMbuf, |
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475 | M_MBUF, M_NOWAIT); |
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476 | sc->txMbuf = malloc (sc->txBdCount * sizeof *sc->txMbuf, |
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477 | M_MBUF, M_NOWAIT); |
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478 | if (!sc->rxMbuf || !sc->txMbuf) |
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479 | rtems_panic ("No memory for mbuf pointers"); |
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480 | |
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481 | /* |
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482 | * Set receiver and transmitter buffer descriptor bases |
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483 | */ |
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484 | sc->rxBdBase = M860AllocateBufferDescriptors(sc->rxBdCount); |
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485 | sc->txBdBase = M860AllocateBufferDescriptors(sc->txBdCount); |
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486 | m860.fec.r_des_start = (int)sc->rxBdBase; |
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487 | m860.fec.x_des_start = (int)sc->txBdBase; |
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488 | |
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489 | /* |
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490 | * Set up Receive Control Register: |
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491 | * Not promiscuous mode |
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492 | * MII mode |
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493 | * Half duplex |
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494 | * No loopback |
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495 | */ |
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496 | m860.fec.r_cntrl = 0x00000006; |
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497 | |
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498 | /* |
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499 | * Set up Transmit Control Register: |
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500 | * Half duplex |
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501 | * No heartbeat |
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502 | */ |
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503 | m860.fec.x_cntrl = 0x00000000; |
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504 | |
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505 | /* |
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506 | * Set up DMA function code: |
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507 | * Big-endian |
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508 | * DMA functino code = 0 |
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509 | */ |
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510 | m860.fec.fun_code = 0x78000000; |
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511 | |
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512 | /* |
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513 | * Initialize SDMA configuration register |
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514 | * SDMA ignores FRZ |
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515 | * FEC not aggressive |
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516 | * FEC arbitration ID = 0 => U-bus arbitration = 6 |
---|
517 | * RISC arbitration ID = 1 => U-bus arbitration = 5 |
---|
518 | */ |
---|
519 | m860.sdcr = 1; |
---|
520 | |
---|
521 | /* |
---|
522 | * Set MII speed to 2.5 MHz for 25 Mhz system clock |
---|
523 | */ |
---|
524 | m860.fec.mii_speed = 0x0a; |
---|
525 | m860.fec.mii_data = 0x58021000; |
---|
526 | |
---|
527 | /* |
---|
528 | * Set up receive buffer descriptors |
---|
529 | */ |
---|
530 | for (i = 0 ; i < sc->rxBdCount ; i++) |
---|
531 | (sc->rxBdBase + i)->status = 0; |
---|
532 | |
---|
533 | /* |
---|
534 | * Set up transmit buffer descriptors |
---|
535 | */ |
---|
536 | for (i = 0 ; i < sc->txBdCount ; i++) { |
---|
537 | (sc->txBdBase + i)->status = 0; |
---|
538 | sc->txMbuf[i] = NULL; |
---|
539 | } |
---|
540 | sc->txBdHead = sc->txBdTail = 0; |
---|
541 | sc->txBdActiveCount = 0; |
---|
542 | |
---|
543 | |
---|
544 | |
---|
545 | /* |
---|
546 | * Mask all FEC interrupts and clear events |
---|
547 | */ |
---|
548 | m860.fec.imask = M860_FEC_IEVENT_TFINT | |
---|
549 | M860_FEC_IEVENT_RFINT; |
---|
550 | m860.fec.ievent = ~0; |
---|
551 | |
---|
552 | /* |
---|
553 | * Set up interrupts |
---|
554 | */ |
---|
555 | status = rtems_interrupt_catch (m860_fec_interrupt_handler, |
---|
556 | PPC_IRQ_LVL2, |
---|
557 | &old_handler); |
---|
558 | if (status != RTEMS_SUCCESSFUL) |
---|
559 | rtems_panic ("Can't attach M860 FEC interrupt handler: %s\n", |
---|
560 | rtems_status_text (status)); |
---|
561 | |
---|
562 | m860.simask |= M860_SIMASK_LVM2; |
---|
563 | |
---|
564 | } |
---|
565 | |
---|
566 | |
---|
567 | /* |
---|
568 | * Soak up buffer descriptors that have been sent |
---|
569 | * Note that a buffer descriptor can't be retired as soon as it becomes |
---|
570 | * ready. The MC68360 Errata (May 96) says that, "If an Ethernet frame is |
---|
571 | * made up of multiple buffers, the user should not reuse the first buffer |
---|
572 | * descriptor until the last buffer descriptor of the frame has had its |
---|
573 | * ready bit cleared by the CPM". |
---|
574 | */ |
---|
575 | static void |
---|
576 | m860Enet_retire_tx_bd (struct m860_enet_struct *sc) |
---|
577 | { |
---|
578 | rtems_unsigned16 status; |
---|
579 | int i; |
---|
580 | int nRetired; |
---|
581 | struct mbuf *m, *n; |
---|
582 | |
---|
583 | i = sc->txBdTail; |
---|
584 | nRetired = 0; |
---|
585 | while ((sc->txBdActiveCount != 0) |
---|
586 | && (((status = (sc->txBdBase + i)->status) & M860_BD_READY) == 0)) { |
---|
587 | /* |
---|
588 | * See if anything went wrong |
---|
589 | */ |
---|
590 | if (status & (M860_BD_DEFER | |
---|
591 | M860_BD_HEARTBEAT | |
---|
592 | M860_BD_LATE_COLLISION | |
---|
593 | M860_BD_RETRY_LIMIT | |
---|
594 | M860_BD_UNDERRUN | |
---|
595 | M860_BD_CARRIER_LOST)) { |
---|
596 | /* |
---|
597 | * Check for errors which stop the transmitter. |
---|
598 | */ |
---|
599 | if (status & (M860_BD_LATE_COLLISION | |
---|
600 | M860_BD_RETRY_LIMIT | |
---|
601 | M860_BD_UNDERRUN)) { |
---|
602 | if (status & M860_BD_LATE_COLLISION) |
---|
603 | enet_driver[0].txLateCollision++; |
---|
604 | if (status & M860_BD_RETRY_LIMIT) |
---|
605 | enet_driver[0].txRetryLimit++; |
---|
606 | if (status & M860_BD_UNDERRUN) |
---|
607 | enet_driver[0].txUnderrun++; |
---|
608 | |
---|
609 | /* |
---|
610 | * Restart the transmitter |
---|
611 | */ |
---|
612 | /* FIXME: this should get executed only if using the SCC */ |
---|
613 | M860ExecuteRISC (M860_CR_OP_RESTART_TX | M860_CR_CHAN_SCC1); |
---|
614 | } |
---|
615 | if (status & M860_BD_DEFER) |
---|
616 | enet_driver[0].txDeferred++; |
---|
617 | if (status & M860_BD_HEARTBEAT) |
---|
618 | enet_driver[0].txHeartbeat++; |
---|
619 | if (status & M860_BD_CARRIER_LOST) |
---|
620 | enet_driver[0].txLostCarrier++; |
---|
621 | } |
---|
622 | nRetired++; |
---|
623 | if (status & M860_BD_LAST) { |
---|
624 | /* |
---|
625 | * A full frame has been transmitted. |
---|
626 | * Free all the associated buffer descriptors. |
---|
627 | */ |
---|
628 | sc->txBdActiveCount -= nRetired; |
---|
629 | while (nRetired) { |
---|
630 | nRetired--; |
---|
631 | m = sc->txMbuf[sc->txBdTail]; |
---|
632 | MFREE (m, n); |
---|
633 | if (++sc->txBdTail == sc->txBdCount) |
---|
634 | sc->txBdTail = 0; |
---|
635 | } |
---|
636 | } |
---|
637 | if (++i == sc->txBdCount) |
---|
638 | i = 0; |
---|
639 | } |
---|
640 | } |
---|
641 | |
---|
642 | /* |
---|
643 | * reader task |
---|
644 | */ |
---|
645 | static void |
---|
646 | scc_rxDaemon (void *arg) |
---|
647 | { |
---|
648 | struct m860_enet_struct *sc = (struct m860_enet_struct *)arg; |
---|
649 | struct ifnet *ifp = &sc->arpcom.ac_if; |
---|
650 | struct mbuf *m; |
---|
651 | rtems_unsigned16 status; |
---|
652 | m860BufferDescriptor_t *rxBd; |
---|
653 | int rxBdIndex; |
---|
654 | |
---|
655 | /* |
---|
656 | * Allocate space for incoming packets and start reception |
---|
657 | */ |
---|
658 | for (rxBdIndex = 0 ; ;) { |
---|
659 | rxBd = sc->rxBdBase + rxBdIndex; |
---|
660 | MGETHDR (m, M_WAIT, MT_DATA); |
---|
661 | MCLGET (m, M_WAIT); |
---|
662 | m->m_pkthdr.rcvif = ifp; |
---|
663 | sc->rxMbuf[rxBdIndex] = m; |
---|
664 | rxBd->buffer = mtod (m, void *); |
---|
665 | rxBd->status = M860_BD_EMPTY | M860_BD_INTERRUPT; |
---|
666 | if (++rxBdIndex == sc->rxBdCount) { |
---|
667 | rxBd->status |= M860_BD_WRAP; |
---|
668 | break; |
---|
669 | } |
---|
670 | } |
---|
671 | |
---|
672 | /* |
---|
673 | * Input packet handling loop |
---|
674 | */ |
---|
675 | rxBdIndex = 0; |
---|
676 | for (;;) { |
---|
677 | rxBd = sc->rxBdBase + rxBdIndex; |
---|
678 | |
---|
679 | /* |
---|
680 | * Wait for packet if there's not one ready |
---|
681 | */ |
---|
682 | if ((status = rxBd->status) & M860_BD_EMPTY) { |
---|
683 | /* |
---|
684 | * Clear old events |
---|
685 | */ |
---|
686 | m860.scc1.scce = 0x8; |
---|
687 | |
---|
688 | /* |
---|
689 | * Wait for packet |
---|
690 | * Note that the buffer descriptor is checked |
---|
691 | * *before* the event wait -- this catches the |
---|
692 | * possibility that a packet arrived between the |
---|
693 | * `if' above, and the clearing of the event register. |
---|
694 | */ |
---|
695 | while ((status = rxBd->status) & M860_BD_EMPTY) { |
---|
696 | rtems_event_set events; |
---|
697 | |
---|
698 | /* |
---|
699 | * Unmask RXF (Full frame received) event |
---|
700 | */ |
---|
701 | m860.scc1.sccm |= 0x8; |
---|
702 | |
---|
703 | rtems_bsdnet_event_receive (INTERRUPT_EVENT, |
---|
704 | RTEMS_WAIT|RTEMS_EVENT_ANY, |
---|
705 | RTEMS_NO_TIMEOUT, |
---|
706 | &events); |
---|
707 | } |
---|
708 | } |
---|
709 | |
---|
710 | /* |
---|
711 | * Check that packet is valid |
---|
712 | */ |
---|
713 | if ((status & (M860_BD_LAST | |
---|
714 | M860_BD_FIRST_IN_FRAME | |
---|
715 | M860_BD_LONG | |
---|
716 | M860_BD_NONALIGNED | |
---|
717 | M860_BD_SHORT | |
---|
718 | M860_BD_CRC_ERROR | |
---|
719 | M860_BD_OVERRUN | |
---|
720 | M860_BD_COLLISION)) == |
---|
721 | (M860_BD_LAST | |
---|
722 | M860_BD_FIRST_IN_FRAME)) { |
---|
723 | /* |
---|
724 | * Pass the packet up the chain. |
---|
725 | * FIXME: Packet filtering hook could be done here. |
---|
726 | */ |
---|
727 | struct ether_header *eh; |
---|
728 | |
---|
729 | m = sc->rxMbuf[rxBdIndex]; |
---|
730 | m->m_len = m->m_pkthdr.len = rxBd->length - |
---|
731 | sizeof(rtems_unsigned32) - |
---|
732 | sizeof(struct ether_header); |
---|
733 | eh = mtod (m, struct ether_header *); |
---|
734 | m->m_data += sizeof(struct ether_header); |
---|
735 | ether_input (ifp, eh, m); |
---|
736 | |
---|
737 | /* |
---|
738 | * Allocate a new mbuf |
---|
739 | */ |
---|
740 | MGETHDR (m, M_WAIT, MT_DATA); |
---|
741 | MCLGET (m, M_WAIT); |
---|
742 | m->m_pkthdr.rcvif = ifp; |
---|
743 | sc->rxMbuf[rxBdIndex] = m; |
---|
744 | rxBd->buffer = mtod (m, void *); |
---|
745 | } |
---|
746 | else { |
---|
747 | /* |
---|
748 | * Something went wrong with the reception |
---|
749 | */ |
---|
750 | if (!(status & M860_BD_LAST)) |
---|
751 | sc->rxNotLast++; |
---|
752 | if (!(status & M860_BD_FIRST_IN_FRAME)) |
---|
753 | sc->rxNotFirst++; |
---|
754 | if (status & M860_BD_LONG) |
---|
755 | sc->rxGiant++; |
---|
756 | if (status & M860_BD_NONALIGNED) |
---|
757 | sc->rxNonOctet++; |
---|
758 | if (status & M860_BD_SHORT) |
---|
759 | sc->rxRunt++; |
---|
760 | if (status & M860_BD_CRC_ERROR) |
---|
761 | sc->rxBadCRC++; |
---|
762 | if (status & M860_BD_OVERRUN) |
---|
763 | sc->rxOverrun++; |
---|
764 | if (status & M860_BD_COLLISION) |
---|
765 | sc->rxCollision++; |
---|
766 | } |
---|
767 | |
---|
768 | /* |
---|
769 | * Reenable the buffer descriptor |
---|
770 | */ |
---|
771 | rxBd->status = (status & (M860_BD_WRAP | M860_BD_INTERRUPT)) | |
---|
772 | M860_BD_EMPTY; |
---|
773 | |
---|
774 | /* |
---|
775 | * Move to next buffer descriptor |
---|
776 | */ |
---|
777 | if (++rxBdIndex == sc->rxBdCount) |
---|
778 | rxBdIndex = 0; |
---|
779 | } |
---|
780 | } |
---|
781 | |
---|
782 | static void |
---|
783 | fec_rxDaemon (void *arg) |
---|
784 | { |
---|
785 | struct m860_enet_struct *sc = (struct m860_enet_struct *)arg; |
---|
786 | struct ifnet *ifp = &sc->arpcom.ac_if; |
---|
787 | struct mbuf *m; |
---|
788 | rtems_unsigned16 status; |
---|
789 | m860BufferDescriptor_t *rxBd; |
---|
790 | int rxBdIndex; |
---|
791 | |
---|
792 | /* |
---|
793 | * Allocate space for incoming packets and start reception |
---|
794 | */ |
---|
795 | for (rxBdIndex = 0 ; ;) { |
---|
796 | rxBd = sc->rxBdBase + rxBdIndex; |
---|
797 | MGETHDR (m, M_WAIT, MT_DATA); |
---|
798 | MCLGET (m, M_WAIT); |
---|
799 | m->m_pkthdr.rcvif = ifp; |
---|
800 | sc->rxMbuf[rxBdIndex] = m; |
---|
801 | rxBd->buffer = mtod (m, void *); |
---|
802 | rxBd->status = M860_BD_EMPTY; |
---|
803 | m860.fec.r_des_active = 0x1000000; |
---|
804 | if (++rxBdIndex == sc->rxBdCount) { |
---|
805 | rxBd->status |= M860_BD_WRAP; |
---|
806 | break; |
---|
807 | } |
---|
808 | } |
---|
809 | |
---|
810 | /* |
---|
811 | * Input packet handling loop |
---|
812 | */ |
---|
813 | rxBdIndex = 0; |
---|
814 | for (;;) { |
---|
815 | rxBd = sc->rxBdBase + rxBdIndex; |
---|
816 | |
---|
817 | /* |
---|
818 | * Wait for packet if there's not one ready |
---|
819 | */ |
---|
820 | if ((status = rxBd->status) & M860_BD_EMPTY) { |
---|
821 | /* |
---|
822 | * Clear old events |
---|
823 | */ |
---|
824 | m860.fec.ievent = M860_FEC_IEVENT_RFINT; |
---|
825 | |
---|
826 | /* |
---|
827 | * Wait for packet |
---|
828 | * Note that the buffer descriptor is checked |
---|
829 | * *before* the event wait -- this catches the |
---|
830 | * possibility that a packet arrived between the |
---|
831 | * `if' above, and the clearing of the event register. |
---|
832 | */ |
---|
833 | while ((status = rxBd->status) & M860_BD_EMPTY) { |
---|
834 | rtems_event_set events; |
---|
835 | |
---|
836 | /* |
---|
837 | * Unmask RXF (Full frame received) event |
---|
838 | */ |
---|
839 | m860.fec.ievent |= M860_FEC_IEVENT_RFINT; |
---|
840 | |
---|
841 | rtems_bsdnet_event_receive (INTERRUPT_EVENT, |
---|
842 | RTEMS_WAIT|RTEMS_EVENT_ANY, |
---|
843 | RTEMS_NO_TIMEOUT, |
---|
844 | &events); |
---|
845 | } |
---|
846 | } |
---|
847 | |
---|
848 | /* |
---|
849 | * Check that packet is valid |
---|
850 | */ |
---|
851 | if (status & M860_BD_LAST) { |
---|
852 | /* |
---|
853 | * Pass the packet up the chain. |
---|
854 | * FIXME: Packet filtering hook could be done here. |
---|
855 | */ |
---|
856 | struct ether_header *eh; |
---|
857 | |
---|
858 | m = sc->rxMbuf[rxBdIndex]; |
---|
859 | m->m_len = m->m_pkthdr.len = rxBd->length - |
---|
860 | sizeof(rtems_unsigned32) - |
---|
861 | sizeof(struct ether_header); |
---|
862 | eh = mtod (m, struct ether_header *); |
---|
863 | m->m_data += sizeof(struct ether_header); |
---|
864 | ether_input (ifp, eh, m); |
---|
865 | |
---|
866 | /* |
---|
867 | * Allocate a new mbuf |
---|
868 | */ |
---|
869 | MGETHDR (m, M_WAIT, MT_DATA); |
---|
870 | MCLGET (m, M_WAIT); |
---|
871 | m->m_pkthdr.rcvif = ifp; |
---|
872 | sc->rxMbuf[rxBdIndex] = m; |
---|
873 | rxBd->buffer = mtod (m, void *); |
---|
874 | } |
---|
875 | else { |
---|
876 | /* |
---|
877 | * Something went wrong with the reception |
---|
878 | */ |
---|
879 | if (!(status & M860_BD_LAST)) |
---|
880 | sc->rxNotLast++; |
---|
881 | if (status & M860_BD_LONG) |
---|
882 | sc->rxGiant++; |
---|
883 | if (status & M860_BD_NONALIGNED) |
---|
884 | sc->rxNonOctet++; |
---|
885 | if (status & M860_BD_SHORT) |
---|
886 | sc->rxRunt++; |
---|
887 | if (status & M860_BD_CRC_ERROR) |
---|
888 | sc->rxBadCRC++; |
---|
889 | if (status & M860_BD_OVERRUN) |
---|
890 | sc->rxOverrun++; |
---|
891 | if (status & M860_BD_COLLISION) |
---|
892 | sc->rxCollision++; |
---|
893 | } |
---|
894 | /* |
---|
895 | * Reenable the buffer descriptor |
---|
896 | */ |
---|
897 | rxBd->status = (status & M860_BD_WRAP) | |
---|
898 | M860_BD_EMPTY; |
---|
899 | m860.fec.r_des_active = 0x1000000; |
---|
900 | /* |
---|
901 | * Move to next buffer descriptor |
---|
902 | */ |
---|
903 | if (++rxBdIndex == sc->rxBdCount) |
---|
904 | rxBdIndex = 0; |
---|
905 | } |
---|
906 | } |
---|
907 | |
---|
908 | static void |
---|
909 | scc_sendpacket (struct ifnet *ifp, struct mbuf *m) |
---|
910 | { |
---|
911 | struct m860_enet_struct *sc = ifp->if_softc; |
---|
912 | volatile m860BufferDescriptor_t *firstTxBd, *txBd; |
---|
913 | struct mbuf *l = NULL; |
---|
914 | rtems_unsigned16 status; |
---|
915 | int nAdded; |
---|
916 | |
---|
917 | /* |
---|
918 | * Free up buffer descriptors |
---|
919 | */ |
---|
920 | m860Enet_retire_tx_bd (sc); |
---|
921 | |
---|
922 | /* |
---|
923 | * Set up the transmit buffer descriptors. |
---|
924 | * No need to pad out short packets since the |
---|
925 | * hardware takes care of that automatically. |
---|
926 | * No need to copy the packet to a contiguous buffer |
---|
927 | * since the hardware is capable of scatter/gather DMA. |
---|
928 | */ |
---|
929 | nAdded = 0; |
---|
930 | txBd = firstTxBd = sc->txBdBase + sc->txBdHead; |
---|
931 | for (;;) { |
---|
932 | /* |
---|
933 | * Wait for buffer descriptor to become available. |
---|
934 | */ |
---|
935 | if ((sc->txBdActiveCount + nAdded) == sc->txBdCount) { |
---|
936 | /* |
---|
937 | * Clear old events |
---|
938 | */ |
---|
939 | m860.scc1.scce = 0x12; |
---|
940 | |
---|
941 | /* |
---|
942 | * Wait for buffer descriptor to become available. |
---|
943 | * Note that the buffer descriptors are checked |
---|
944 | * *before* * entering the wait loop -- this catches |
---|
945 | * the possibility that a buffer descriptor became |
---|
946 | * available between the `if' above, and the clearing |
---|
947 | * of the event register. |
---|
948 | * This is to catch the case where the transmitter |
---|
949 | * stops in the middle of a frame -- and only the |
---|
950 | * last buffer descriptor in a frame can generate |
---|
951 | * an interrupt. |
---|
952 | */ |
---|
953 | m860Enet_retire_tx_bd (sc); |
---|
954 | while ((sc->txBdActiveCount + nAdded) == sc->txBdCount) { |
---|
955 | rtems_event_set events; |
---|
956 | |
---|
957 | /* |
---|
958 | * Unmask TXB (buffer transmitted) and |
---|
959 | * TXE (transmitter error) events. |
---|
960 | */ |
---|
961 | m860.scc1.sccm |= 0x12; |
---|
962 | rtems_bsdnet_event_receive (INTERRUPT_EVENT, |
---|
963 | RTEMS_WAIT|RTEMS_EVENT_ANY, |
---|
964 | RTEMS_NO_TIMEOUT, |
---|
965 | &events); |
---|
966 | m860Enet_retire_tx_bd (sc); |
---|
967 | } |
---|
968 | } |
---|
969 | |
---|
970 | /* |
---|
971 | * Don't set the READY flag till the |
---|
972 | * whole packet has been readied. |
---|
973 | */ |
---|
974 | status = nAdded ? M860_BD_READY : 0; |
---|
975 | |
---|
976 | /* |
---|
977 | * FIXME: Why not deal with empty mbufs at at higher level? |
---|
978 | * The IP fragmentation routine in ip_output |
---|
979 | * can produce packet fragments with zero length. |
---|
980 | * I think that ip_output should be changed to get |
---|
981 | * rid of these zero-length mbufs, but for now, |
---|
982 | * I'll deal with them here. |
---|
983 | */ |
---|
984 | if (m->m_len) { |
---|
985 | /* |
---|
986 | * Fill in the buffer descriptor |
---|
987 | */ |
---|
988 | txBd->buffer = mtod (m, void *); |
---|
989 | txBd->length = m->m_len; |
---|
990 | sc->txMbuf[sc->txBdHead] = m; |
---|
991 | nAdded++; |
---|
992 | if (++sc->txBdHead == sc->txBdCount) { |
---|
993 | status |= M860_BD_WRAP; |
---|
994 | sc->txBdHead = 0; |
---|
995 | } |
---|
996 | l = m; |
---|
997 | m = m->m_next; |
---|
998 | } |
---|
999 | else { |
---|
1000 | /* |
---|
1001 | * Just toss empty mbufs |
---|
1002 | */ |
---|
1003 | struct mbuf *n; |
---|
1004 | MFREE (m, n); |
---|
1005 | m = n; |
---|
1006 | if (l != NULL) |
---|
1007 | l->m_next = m; |
---|
1008 | } |
---|
1009 | |
---|
1010 | /* |
---|
1011 | * Set the transmit buffer status. |
---|
1012 | * Break out of the loop if this mbuf is the last in the frame. |
---|
1013 | */ |
---|
1014 | if (m == NULL) { |
---|
1015 | if (nAdded) { |
---|
1016 | status |= M860_BD_PAD | M860_BD_LAST | M860_BD_TX_CRC | M860_BD_INTERRUPT; |
---|
1017 | txBd->status = status; |
---|
1018 | firstTxBd->status |= M860_BD_READY; |
---|
1019 | sc->txBdActiveCount += nAdded; |
---|
1020 | } |
---|
1021 | break; |
---|
1022 | } |
---|
1023 | txBd->status = status; |
---|
1024 | txBd = sc->txBdBase + sc->txBdHead; |
---|
1025 | } |
---|
1026 | } |
---|
1027 | |
---|
1028 | static void |
---|
1029 | fec_sendpacket (struct ifnet *ifp, struct mbuf *m) |
---|
1030 | { |
---|
1031 | struct m860_enet_struct *sc = ifp->if_softc; |
---|
1032 | volatile m860BufferDescriptor_t *firstTxBd, *txBd; |
---|
1033 | /* struct mbuf *l = NULL; */ |
---|
1034 | rtems_unsigned16 status; |
---|
1035 | int nAdded; |
---|
1036 | |
---|
1037 | /* |
---|
1038 | * Free up buffer descriptors |
---|
1039 | */ |
---|
1040 | m860Enet_retire_tx_bd (sc); |
---|
1041 | |
---|
1042 | /* |
---|
1043 | * Set up the transmit buffer descriptors. |
---|
1044 | * No need to pad out short packets since the |
---|
1045 | * hardware takes care of that automatically. |
---|
1046 | * No need to copy the packet to a contiguous buffer |
---|
1047 | * since the hardware is capable of scatter/gather DMA. |
---|
1048 | */ |
---|
1049 | nAdded = 0; |
---|
1050 | txBd = firstTxBd = sc->txBdBase + sc->txBdHead; |
---|
1051 | for (;;) { |
---|
1052 | /* |
---|
1053 | * Wait for buffer descriptor to become available. |
---|
1054 | */ |
---|
1055 | if ((sc->txBdActiveCount + nAdded) == sc->txBdCount) { |
---|
1056 | /* |
---|
1057 | * Clear old events |
---|
1058 | */ |
---|
1059 | m860.fec.ievent = M860_FEC_IEVENT_TFINT; |
---|
1060 | |
---|
1061 | /* |
---|
1062 | * Wait for buffer descriptor to become available. |
---|
1063 | * Note that the buffer descriptors are checked |
---|
1064 | * *before* * entering the wait loop -- this catches |
---|
1065 | * the possibility that a buffer descriptor became |
---|
1066 | * available between the `if' above, and the clearing |
---|
1067 | * of the event register. |
---|
1068 | * This is to catch the case where the transmitter |
---|
1069 | * stops in the middle of a frame -- and only the |
---|
1070 | * last buffer descriptor in a frame can generate |
---|
1071 | * an interrupt. |
---|
1072 | */ |
---|
1073 | m860Enet_retire_tx_bd (sc); |
---|
1074 | while ((sc->txBdActiveCount + nAdded) == sc->txBdCount) { |
---|
1075 | rtems_event_set events; |
---|
1076 | |
---|
1077 | /* |
---|
1078 | * Unmask TXB (buffer transmitted) and |
---|
1079 | * TXE (transmitter error) events. |
---|
1080 | */ |
---|
1081 | m860.fec.ievent |= M860_FEC_IEVENT_TFINT; |
---|
1082 | rtems_bsdnet_event_receive (INTERRUPT_EVENT, |
---|
1083 | RTEMS_WAIT|RTEMS_EVENT_ANY, |
---|
1084 | RTEMS_NO_TIMEOUT, |
---|
1085 | &events); |
---|
1086 | m860Enet_retire_tx_bd (sc); |
---|
1087 | } |
---|
1088 | } |
---|
1089 | |
---|
1090 | /* |
---|
1091 | * Don't set the READY flag till the |
---|
1092 | * whole packet has been readied. |
---|
1093 | */ |
---|
1094 | status = nAdded ? M860_BD_READY : 0; |
---|
1095 | |
---|
1096 | /* |
---|
1097 | * FIXME: Why not deal with empty mbufs at at higher level? |
---|
1098 | * The IP fragmentation routine in ip_output |
---|
1099 | * can produce packet fragments with zero length. |
---|
1100 | * I think that ip_output should be changed to get |
---|
1101 | * rid of these zero-length mbufs, but for now, |
---|
1102 | * I'll deal with them here. |
---|
1103 | */ |
---|
1104 | if (m->m_len) { |
---|
1105 | /* |
---|
1106 | * Fill in the buffer descriptor |
---|
1107 | */ |
---|
1108 | txBd->buffer = mtod (m, void *); |
---|
1109 | txBd->length = m->m_len; |
---|
1110 | sc->txMbuf[sc->txBdHead] = m; |
---|
1111 | nAdded++; |
---|
1112 | if (++sc->txBdHead == sc->txBdCount) { |
---|
1113 | status |= M860_BD_WRAP; |
---|
1114 | sc->txBdHead = 0; |
---|
1115 | } |
---|
1116 | /* l = m;*/ |
---|
1117 | m = m->m_next; |
---|
1118 | } |
---|
1119 | else { |
---|
1120 | /* |
---|
1121 | * Just toss empty mbufs |
---|
1122 | */ |
---|
1123 | struct mbuf *n; |
---|
1124 | MFREE (m, n); |
---|
1125 | m = n; |
---|
1126 | /* |
---|
1127 | if (l != NULL) |
---|
1128 | l->m_next = m; |
---|
1129 | */ |
---|
1130 | } |
---|
1131 | |
---|
1132 | /* |
---|
1133 | * Set the transmit buffer status. |
---|
1134 | * Break out of the loop if this mbuf is the last in the frame. |
---|
1135 | */ |
---|
1136 | if (m == NULL) { |
---|
1137 | if (nAdded) { |
---|
1138 | status |= M860_BD_LAST | M860_BD_TX_CRC; |
---|
1139 | txBd->status = status; |
---|
1140 | firstTxBd->status |= M860_BD_READY; |
---|
1141 | m860.fec.x_des_active = 0x1000000; |
---|
1142 | sc->txBdActiveCount += nAdded; |
---|
1143 | } |
---|
1144 | break; |
---|
1145 | } |
---|
1146 | txBd->status = status; |
---|
1147 | txBd = sc->txBdBase + sc->txBdHead; |
---|
1148 | } |
---|
1149 | } |
---|
1150 | |
---|
1151 | /* |
---|
1152 | * Driver transmit daemon |
---|
1153 | */ |
---|
1154 | void |
---|
1155 | scc_txDaemon (void *arg) |
---|
1156 | { |
---|
1157 | struct m860_enet_struct *sc = (struct m860_enet_struct *)arg; |
---|
1158 | struct ifnet *ifp = &sc->arpcom.ac_if; |
---|
1159 | struct mbuf *m; |
---|
1160 | rtems_event_set events; |
---|
1161 | |
---|
1162 | for (;;) { |
---|
1163 | /* |
---|
1164 | * Wait for packet |
---|
1165 | */ |
---|
1166 | rtems_bsdnet_event_receive (START_TRANSMIT_EVENT, RTEMS_EVENT_ANY | RTEMS_WAIT, RTEMS_NO_TIMEOUT, &events); |
---|
1167 | |
---|
1168 | /* |
---|
1169 | * Send packets till queue is empty |
---|
1170 | */ |
---|
1171 | for (;;) { |
---|
1172 | /* |
---|
1173 | * Get the next mbuf chain to transmit. |
---|
1174 | */ |
---|
1175 | IF_DEQUEUE(&ifp->if_snd, m); |
---|
1176 | if (!m) |
---|
1177 | break; |
---|
1178 | scc_sendpacket (ifp, m); |
---|
1179 | } |
---|
1180 | ifp->if_flags &= ~IFF_OACTIVE; |
---|
1181 | } |
---|
1182 | } |
---|
1183 | |
---|
1184 | void |
---|
1185 | fec_txDaemon (void *arg) |
---|
1186 | { |
---|
1187 | struct m860_enet_struct *sc = (struct m860_enet_struct *)arg; |
---|
1188 | struct ifnet *ifp = &sc->arpcom.ac_if; |
---|
1189 | struct mbuf *m; |
---|
1190 | rtems_event_set events; |
---|
1191 | |
---|
1192 | for (;;) { |
---|
1193 | /* |
---|
1194 | * Wait for packet |
---|
1195 | */ |
---|
1196 | rtems_bsdnet_event_receive (START_TRANSMIT_EVENT, |
---|
1197 | RTEMS_EVENT_ANY | RTEMS_WAIT, |
---|
1198 | RTEMS_NO_TIMEOUT, |
---|
1199 | &events); |
---|
1200 | |
---|
1201 | /* |
---|
1202 | * Send packets till queue is empty |
---|
1203 | */ |
---|
1204 | for (;;) { |
---|
1205 | /* |
---|
1206 | * Get the next mbuf chain to transmit. |
---|
1207 | */ |
---|
1208 | IF_DEQUEUE(&ifp->if_snd, m); |
---|
1209 | if (!m) |
---|
1210 | break; |
---|
1211 | fec_sendpacket (ifp, m); |
---|
1212 | } |
---|
1213 | ifp->if_flags &= ~IFF_OACTIVE; |
---|
1214 | } |
---|
1215 | } |
---|
1216 | |
---|
1217 | /* |
---|
1218 | * Send packet (caller provides header). |
---|
1219 | */ |
---|
1220 | static void |
---|
1221 | m860_enet_start (struct ifnet *ifp) |
---|
1222 | { |
---|
1223 | struct m860_enet_struct *sc = ifp->if_softc; |
---|
1224 | |
---|
1225 | rtems_event_send (sc->txDaemonTid, START_TRANSMIT_EVENT); |
---|
1226 | ifp->if_flags |= IFF_OACTIVE; |
---|
1227 | } |
---|
1228 | |
---|
1229 | /* |
---|
1230 | * Initialize and start the device |
---|
1231 | */ |
---|
1232 | static void |
---|
1233 | scc_init (void *arg) |
---|
1234 | { |
---|
1235 | struct m860_enet_struct *sc = arg; |
---|
1236 | struct ifnet *ifp = &sc->arpcom.ac_if; |
---|
1237 | |
---|
1238 | if (sc->txDaemonTid == 0) { |
---|
1239 | |
---|
1240 | /* |
---|
1241 | * Set up SCC hardware |
---|
1242 | */ |
---|
1243 | m860_scc_initialize_hardware (sc); |
---|
1244 | |
---|
1245 | /* |
---|
1246 | * Start driver tasks |
---|
1247 | */ |
---|
1248 | sc->txDaemonTid = rtems_bsdnet_newproc ("SCtx", 4096, scc_txDaemon, sc); |
---|
1249 | sc->rxDaemonTid = rtems_bsdnet_newproc ("SCrx", 4096, scc_rxDaemon, sc); |
---|
1250 | |
---|
1251 | } |
---|
1252 | |
---|
1253 | /* |
---|
1254 | * Set flags appropriately |
---|
1255 | */ |
---|
1256 | if (ifp->if_flags & IFF_PROMISC) |
---|
1257 | m860.scc1.psmr |= 0x200; |
---|
1258 | else |
---|
1259 | m860.scc1.psmr &= ~0x200; |
---|
1260 | |
---|
1261 | /* |
---|
1262 | * Tell the world that we're running. |
---|
1263 | */ |
---|
1264 | ifp->if_flags |= IFF_RUNNING; |
---|
1265 | |
---|
1266 | /* |
---|
1267 | * Enable receiver and transmitter |
---|
1268 | */ |
---|
1269 | m860.scc1.gsmr_l |= 0x30; |
---|
1270 | } |
---|
1271 | |
---|
1272 | static void |
---|
1273 | fec_init (void *arg) |
---|
1274 | { |
---|
1275 | struct m860_enet_struct *sc = arg; |
---|
1276 | struct ifnet *ifp = &sc->arpcom.ac_if; |
---|
1277 | |
---|
1278 | if (sc->txDaemonTid == 0) { |
---|
1279 | |
---|
1280 | /* |
---|
1281 | * Set up SCC hardware |
---|
1282 | */ |
---|
1283 | m860_fec_initialize_hardware (sc); |
---|
1284 | |
---|
1285 | /* |
---|
1286 | * Start driver tasks |
---|
1287 | */ |
---|
1288 | sc->txDaemonTid = rtems_bsdnet_newproc ("SCtx", 4096, fec_txDaemon, sc); |
---|
1289 | sc->rxDaemonTid = rtems_bsdnet_newproc ("SCrx", 4096, fec_rxDaemon, sc); |
---|
1290 | |
---|
1291 | } |
---|
1292 | |
---|
1293 | /* |
---|
1294 | * Set flags appropriately |
---|
1295 | */ |
---|
1296 | if (ifp->if_flags & IFF_PROMISC) |
---|
1297 | m860.fec.r_cntrl |= 0x8; |
---|
1298 | else |
---|
1299 | m860.fec.r_cntrl &= ~0x8; |
---|
1300 | |
---|
1301 | |
---|
1302 | /* |
---|
1303 | * Tell the world that we're running. |
---|
1304 | */ |
---|
1305 | ifp->if_flags |= IFF_RUNNING; |
---|
1306 | |
---|
1307 | /* |
---|
1308 | * Enable receiver and transmitter |
---|
1309 | */ |
---|
1310 | m860.fec.ecntrl = 0x2; |
---|
1311 | } |
---|
1312 | |
---|
1313 | |
---|
1314 | /* |
---|
1315 | * Stop the device |
---|
1316 | */ |
---|
1317 | static void |
---|
1318 | scc_stop (struct m860_enet_struct *sc) |
---|
1319 | { |
---|
1320 | struct ifnet *ifp = &sc->arpcom.ac_if; |
---|
1321 | |
---|
1322 | ifp->if_flags &= ~IFF_RUNNING; |
---|
1323 | |
---|
1324 | /* |
---|
1325 | * Shut down receiver and transmitter |
---|
1326 | */ |
---|
1327 | m860.scc1.gsmr_l &= ~0x30; |
---|
1328 | } |
---|
1329 | |
---|
1330 | static void |
---|
1331 | fec_stop (struct m860_enet_struct *sc) |
---|
1332 | { |
---|
1333 | struct ifnet *ifp = &sc->arpcom.ac_if; |
---|
1334 | |
---|
1335 | ifp->if_flags &= ~IFF_RUNNING; |
---|
1336 | |
---|
1337 | /* |
---|
1338 | * Shut down receiver and transmitter |
---|
1339 | */ |
---|
1340 | m860.fec.ecntrl = 0x0; |
---|
1341 | } |
---|
1342 | |
---|
1343 | /* |
---|
1344 | * Show interface statistics |
---|
1345 | */ |
---|
1346 | static void |
---|
1347 | enet_stats (struct m860_enet_struct *sc) |
---|
1348 | { |
---|
1349 | printf (" Rx Interrupts:%-8lu", sc->rxInterrupts); |
---|
1350 | printf (" Not First:%-8lu", sc->rxNotFirst); |
---|
1351 | printf (" Not Last:%-8lu\n", sc->rxNotLast); |
---|
1352 | printf (" Giant:%-8lu", sc->rxGiant); |
---|
1353 | printf (" Runt:%-8lu", sc->rxRunt); |
---|
1354 | printf (" Non-octet:%-8lu\n", sc->rxNonOctet); |
---|
1355 | printf (" Bad CRC:%-8lu", sc->rxBadCRC); |
---|
1356 | printf (" Overrun:%-8lu", sc->rxOverrun); |
---|
1357 | printf (" Collision:%-8lu\n", sc->rxCollision); |
---|
1358 | printf (" Discarded:%-8lu\n", (unsigned long)m860.scc1p.un.ethernet.disfc); |
---|
1359 | |
---|
1360 | printf (" Tx Interrupts:%-8lu", sc->txInterrupts); |
---|
1361 | printf (" Deferred:%-8lu", sc->txDeferred); |
---|
1362 | printf (" Missed Hearbeat:%-8lu\n", sc->txHeartbeat); |
---|
1363 | printf (" No Carrier:%-8lu", sc->txLostCarrier); |
---|
1364 | printf ("Retransmit Limit:%-8lu", sc->txRetryLimit); |
---|
1365 | printf (" Late Collision:%-8lu\n", sc->txLateCollision); |
---|
1366 | printf (" Underrun:%-8lu", sc->txUnderrun); |
---|
1367 | printf (" Raw output wait:%-8lu\n", sc->txRawWait); |
---|
1368 | } |
---|
1369 | |
---|
1370 | /* |
---|
1371 | * Driver ioctl handler |
---|
1372 | */ |
---|
1373 | static int |
---|
1374 | scc_ioctl (struct ifnet *ifp, int command, caddr_t data) |
---|
1375 | { |
---|
1376 | struct m860_enet_struct *sc = ifp->if_softc; |
---|
1377 | int error = 0; |
---|
1378 | |
---|
1379 | switch (command) { |
---|
1380 | case SIOCGIFADDR: |
---|
1381 | case SIOCSIFADDR: |
---|
1382 | ether_ioctl (ifp, command, data); |
---|
1383 | break; |
---|
1384 | |
---|
1385 | case SIOCSIFFLAGS: |
---|
1386 | switch (ifp->if_flags & (IFF_UP | IFF_RUNNING)) { |
---|
1387 | case IFF_RUNNING: |
---|
1388 | scc_stop (sc); |
---|
1389 | break; |
---|
1390 | |
---|
1391 | case IFF_UP: |
---|
1392 | scc_init (sc); |
---|
1393 | break; |
---|
1394 | |
---|
1395 | case IFF_UP | IFF_RUNNING: |
---|
1396 | scc_stop (sc); |
---|
1397 | scc_init (sc); |
---|
1398 | break; |
---|
1399 | |
---|
1400 | default: |
---|
1401 | break; |
---|
1402 | } |
---|
1403 | break; |
---|
1404 | |
---|
1405 | case SIO_RTEMS_SHOW_STATS: |
---|
1406 | enet_stats (sc); |
---|
1407 | break; |
---|
1408 | |
---|
1409 | /* |
---|
1410 | * FIXME: All sorts of multicast commands need to be added here! |
---|
1411 | */ |
---|
1412 | default: |
---|
1413 | error = EINVAL; |
---|
1414 | break; |
---|
1415 | } |
---|
1416 | return error; |
---|
1417 | } |
---|
1418 | |
---|
1419 | static int |
---|
1420 | fec_ioctl (struct ifnet *ifp, int command, caddr_t data) |
---|
1421 | { |
---|
1422 | struct m860_enet_struct *sc = ifp->if_softc; |
---|
1423 | int error = 0; |
---|
1424 | |
---|
1425 | switch (command) { |
---|
1426 | case SIOCGIFADDR: |
---|
1427 | case SIOCSIFADDR: |
---|
1428 | ether_ioctl (ifp, command, data); |
---|
1429 | break; |
---|
1430 | |
---|
1431 | case SIOCSIFFLAGS: |
---|
1432 | switch (ifp->if_flags & (IFF_UP | IFF_RUNNING)) { |
---|
1433 | case IFF_RUNNING: |
---|
1434 | fec_stop (sc); |
---|
1435 | break; |
---|
1436 | |
---|
1437 | case IFF_UP: |
---|
1438 | fec_init (sc); |
---|
1439 | break; |
---|
1440 | |
---|
1441 | case IFF_UP | IFF_RUNNING: |
---|
1442 | fec_stop (sc); |
---|
1443 | fec_init (sc); |
---|
1444 | break; |
---|
1445 | |
---|
1446 | default: |
---|
1447 | break; |
---|
1448 | } |
---|
1449 | break; |
---|
1450 | |
---|
1451 | case SIO_RTEMS_SHOW_STATS: |
---|
1452 | enet_stats (sc); |
---|
1453 | break; |
---|
1454 | |
---|
1455 | /* |
---|
1456 | * FIXME: All sorts of multicast commands need to be added here! |
---|
1457 | */ |
---|
1458 | default: |
---|
1459 | error = EINVAL; |
---|
1460 | break; |
---|
1461 | } |
---|
1462 | return error; |
---|
1463 | } |
---|
1464 | |
---|
1465 | /* |
---|
1466 | * Attach an SCC driver to the system |
---|
1467 | */ |
---|
1468 | int |
---|
1469 | rtems_scc1_driver_attach (struct rtems_bsdnet_ifconfig *config) |
---|
1470 | { |
---|
1471 | struct m860_enet_struct *sc; |
---|
1472 | struct ifnet *ifp; |
---|
1473 | int mtu; |
---|
1474 | int i; |
---|
1475 | |
---|
1476 | /* |
---|
1477 | * Find a free driver |
---|
1478 | */ |
---|
1479 | for (i = 0 ; i < NIFACES ; i++) { |
---|
1480 | sc = &enet_driver[i]; |
---|
1481 | ifp = &sc->arpcom.ac_if; |
---|
1482 | if (ifp->if_softc == NULL) |
---|
1483 | break; |
---|
1484 | } |
---|
1485 | if (i >= NIFACES) { |
---|
1486 | printf ("Too many SCC drivers.\n"); |
---|
1487 | return 0; |
---|
1488 | } |
---|
1489 | |
---|
1490 | /* |
---|
1491 | * Process options |
---|
1492 | */ |
---|
1493 | if (config->hardware_address) { |
---|
1494 | memcpy (sc->arpcom.ac_enaddr, config->hardware_address, ETHER_ADDR_LEN); |
---|
1495 | } |
---|
1496 | else { |
---|
1497 | sc->arpcom.ac_enaddr[0] = 0x44; |
---|
1498 | sc->arpcom.ac_enaddr[1] = 0x22; |
---|
1499 | sc->arpcom.ac_enaddr[2] = 0x33; |
---|
1500 | sc->arpcom.ac_enaddr[3] = 0x33; |
---|
1501 | sc->arpcom.ac_enaddr[4] = 0x22; |
---|
1502 | sc->arpcom.ac_enaddr[5] = 0x44; |
---|
1503 | } |
---|
1504 | if (config->mtu) |
---|
1505 | mtu = config->mtu; |
---|
1506 | else |
---|
1507 | mtu = ETHERMTU; |
---|
1508 | if (config->rbuf_count) |
---|
1509 | sc->rxBdCount = config->rbuf_count; |
---|
1510 | else |
---|
1511 | sc->rxBdCount = RX_BUF_COUNT; |
---|
1512 | if (config->xbuf_count) |
---|
1513 | sc->txBdCount = config->xbuf_count; |
---|
1514 | else |
---|
1515 | sc->txBdCount = TX_BUF_COUNT * TX_BD_PER_BUF; |
---|
1516 | sc->acceptBroadcast = !config->ignore_broadcast; |
---|
1517 | |
---|
1518 | /* |
---|
1519 | * Set up network interface values |
---|
1520 | */ |
---|
1521 | ifp->if_softc = sc; |
---|
1522 | ifp->if_unit = i + 1; |
---|
1523 | ifp->if_name = "eth"; |
---|
1524 | ifp->if_mtu = mtu; |
---|
1525 | ifp->if_init = scc_init; |
---|
1526 | ifp->if_ioctl = scc_ioctl; |
---|
1527 | ifp->if_start = m860_enet_start; |
---|
1528 | ifp->if_output = ether_output; |
---|
1529 | ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX; |
---|
1530 | if (ifp->if_snd.ifq_maxlen == 0) |
---|
1531 | ifp->if_snd.ifq_maxlen = ifqmaxlen; |
---|
1532 | |
---|
1533 | /* |
---|
1534 | * Attach the interface |
---|
1535 | */ |
---|
1536 | if_attach (ifp); |
---|
1537 | ether_ifattach (ifp); |
---|
1538 | return 1; |
---|
1539 | }; |
---|
1540 | |
---|
1541 | int |
---|
1542 | rtems_fec_driver_attach (struct rtems_bsdnet_ifconfig *config) |
---|
1543 | { |
---|
1544 | struct m860_enet_struct *sc; |
---|
1545 | struct ifnet *ifp; |
---|
1546 | int mtu; |
---|
1547 | |
---|
1548 | /* |
---|
1549 | * Find a free driver |
---|
1550 | */ |
---|
1551 | sc = &enet_driver[0]; |
---|
1552 | ifp = &sc->arpcom.ac_if; |
---|
1553 | if (ifp->if_softc != NULL) |
---|
1554 | return 0; |
---|
1555 | |
---|
1556 | |
---|
1557 | /* |
---|
1558 | * Process options |
---|
1559 | */ |
---|
1560 | if (config->hardware_address) { |
---|
1561 | memcpy (sc->arpcom.ac_enaddr, config->hardware_address, ETHER_ADDR_LEN); |
---|
1562 | } |
---|
1563 | else { |
---|
1564 | sc->arpcom.ac_enaddr[0] = 0x44; |
---|
1565 | sc->arpcom.ac_enaddr[1] = 0x22; |
---|
1566 | sc->arpcom.ac_enaddr[2] = 0x33; |
---|
1567 | sc->arpcom.ac_enaddr[3] = 0x33; |
---|
1568 | sc->arpcom.ac_enaddr[4] = 0x22; |
---|
1569 | sc->arpcom.ac_enaddr[5] = 0x44; |
---|
1570 | } |
---|
1571 | if (config->mtu) |
---|
1572 | mtu = config->mtu; |
---|
1573 | else |
---|
1574 | mtu = ETHERMTU; |
---|
1575 | if (config->rbuf_count) |
---|
1576 | sc->rxBdCount = config->rbuf_count; |
---|
1577 | else |
---|
1578 | sc->rxBdCount = RX_BUF_COUNT; |
---|
1579 | if (config->xbuf_count) |
---|
1580 | sc->txBdCount = config->xbuf_count; |
---|
1581 | else |
---|
1582 | sc->txBdCount = TX_BUF_COUNT * TX_BD_PER_BUF; |
---|
1583 | sc->acceptBroadcast = !config->ignore_broadcast; |
---|
1584 | |
---|
1585 | /* |
---|
1586 | * Set up network interface values |
---|
1587 | */ |
---|
1588 | ifp->if_softc = sc; |
---|
1589 | ifp->if_unit = 1; |
---|
1590 | ifp->if_name = "eth"; |
---|
1591 | ifp->if_mtu = mtu; |
---|
1592 | ifp->if_init = fec_init; |
---|
1593 | ifp->if_ioctl = fec_ioctl; |
---|
1594 | ifp->if_start = m860_enet_start; |
---|
1595 | ifp->if_output = ether_output; |
---|
1596 | ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX; |
---|
1597 | if (ifp->if_snd.ifq_maxlen == 0) |
---|
1598 | ifp->if_snd.ifq_maxlen = ifqmaxlen; |
---|
1599 | |
---|
1600 | /* |
---|
1601 | * Attach the interface |
---|
1602 | */ |
---|
1603 | if_attach (ifp); |
---|
1604 | ether_ifattach (ifp); |
---|
1605 | return 1; |
---|
1606 | }; |
---|
1607 | |
---|
1608 | int |
---|
1609 | rtems_enet_driver_attach (struct rtems_bsdnet_ifconfig *config) |
---|
1610 | { |
---|
1611 | int i; |
---|
1612 | |
---|
1613 | if ((m860.fec.mii_data & 0xffff) == 0x2000) { |
---|
1614 | /* rtems_scc1_driver_attach(config);*/ |
---|
1615 | return rtems_fec_driver_attach(config); |
---|
1616 | } |
---|
1617 | else { |
---|
1618 | return rtems_scc1_driver_attach(config); |
---|
1619 | } |
---|
1620 | } |
---|