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 <stdio.h> |
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21 | #include <rtems/error.h> |
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22 | #include <rtems/rtems_bsdnet.h> |
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23 | |
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24 | #include <sys/param.h> |
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25 | #include <sys/mbuf.h> |
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26 | #include <sys/socket.h> |
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27 | #include <sys/sockio.h> |
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28 | |
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29 | #include <net/if.h> |
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30 | |
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31 | #include <netinet/in.h> |
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32 | #include <netinet/if_ether.h> |
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33 | #include <bsp/irq.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 | #define INET_ADDR_MAX_BUF_SIZE (sizeof "255.255.255.255") |
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50 | |
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51 | /* |
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52 | * RTEMS event used by interrupt handler to signal daemons. |
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53 | * This must *not* be the same event used by the TCP/IP task synchronization. |
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54 | */ |
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55 | #define INTERRUPT_EVENT RTEMS_EVENT_1 |
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56 | |
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57 | /* |
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58 | * RTEMS event used to start transmit daemon. |
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59 | * This must not be the same as INTERRUPT_EVENT. |
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60 | */ |
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61 | #define START_TRANSMIT_EVENT RTEMS_EVENT_2 |
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62 | |
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63 | /* |
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64 | * Receive buffer size -- Allow for a full ethernet packet plus a pointer |
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65 | */ |
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66 | #define RBUF_SIZE 1520 |
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67 | |
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68 | #if (MCLBYTES < RBUF_SIZE) |
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69 | # error "Driver must have MCLBYTES > RBUF_SIZE" |
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70 | #endif |
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71 | |
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72 | /* |
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73 | * Per-device data |
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74 | */ |
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75 | struct m860_enet_struct { |
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76 | struct arpcom arpcom; |
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77 | struct mbuf **rxMbuf; |
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78 | struct mbuf **txMbuf; |
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79 | int acceptBroadcast; |
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80 | int rxBdCount; |
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81 | int txBdCount; |
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82 | int txBdHead; |
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83 | int txBdTail; |
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84 | int txBdActiveCount; |
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85 | m8xxBufferDescriptor_t *rxBdBase; |
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86 | m8xxBufferDescriptor_t *txBdBase; |
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87 | rtems_id rxDaemonTid; |
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88 | rtems_id txDaemonTid; |
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89 | |
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90 | /* |
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91 | * Statistics |
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92 | */ |
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93 | unsigned long rxInterrupts; |
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94 | unsigned long rxNotFirst; |
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95 | unsigned long rxNotLast; |
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96 | unsigned long rxGiant; |
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97 | unsigned long rxNonOctet; |
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98 | unsigned long rxRunt; |
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99 | unsigned long rxBadCRC; |
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100 | unsigned long rxOverrun; |
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101 | unsigned long rxCollision; |
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102 | |
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103 | unsigned long txInterrupts; |
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104 | unsigned long txDeferred; |
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105 | unsigned long txHeartbeat; |
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106 | unsigned long txLateCollision; |
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107 | unsigned long txRetryLimit; |
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108 | unsigned long txUnderrun; |
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109 | unsigned long txLostCarrier; |
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110 | unsigned long txRawWait; |
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111 | }; |
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112 | static struct m860_enet_struct enet_driver[NIFACES]; |
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113 | |
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114 | static void m8xx_scc1_ethernet_on(const rtems_irq_connect_data* ptr) |
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115 | { |
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116 | /* |
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117 | * Please put relevant code there |
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118 | */ |
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119 | } |
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120 | |
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121 | static void m8xx_scc1_ethernet_off(const rtems_irq_connect_data* ptr) |
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122 | { |
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123 | /* |
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124 | * Please put relevant code there |
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125 | */ |
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126 | } |
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127 | |
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128 | static void m8xx_scc1_ethernet_isOn(const rtems_irq_connect_data* ptr) |
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129 | { |
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130 | return BSP_irq_enabled_at_cpm (ptr->name); |
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131 | } |
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132 | |
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133 | /* |
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134 | * SCC1 interrupt handler |
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135 | */ |
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136 | static void m860_scc1_interrupt_handler () |
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137 | { |
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138 | /* |
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139 | * Frame received? |
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140 | */ |
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141 | if ((m8xx.scc1.sccm & 0x8) && (m8xx.scc1.scce & 0x8)) { |
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142 | m8xx.scc1.scce = 0x8; |
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143 | /* I don't think the next line is needed. It was in |
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144 | * the 68360 stuff, though. |
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145 | * m8xx.scc1.sccm &= ~0x8; |
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146 | */ |
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147 | enet_driver[0].rxInterrupts++; |
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148 | rtems_event_send (enet_driver[0].rxDaemonTid, INTERRUPT_EVENT); |
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149 | } |
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150 | |
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151 | /* |
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152 | * Buffer transmitted or transmitter error? |
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153 | */ |
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154 | if ((m8xx.scc1.sccm & 0x12) && (m8xx.scc1.scce & 0x12)) { |
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155 | m8xx.scc1.scce = 0x12; |
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156 | /* I don't think the next line is needed. It was in |
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157 | * the 68360 stuff, though. |
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158 | * m8xx.scc1.sccm &= ~0x12; |
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159 | */ |
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160 | enet_driver[0].txInterrupts++; |
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161 | rtems_event_send (enet_driver[0].txDaemonTid, INTERRUPT_EVENT); |
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162 | } |
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163 | } |
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164 | |
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165 | /* |
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166 | * FEC interrupt handler |
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167 | */ |
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168 | static void m860_fec_interrupt_handler () |
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169 | { |
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170 | /* |
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171 | * Frame received? |
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172 | */ |
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173 | if (m8xx.fec.ievent & M8xx_FEC_IEVENT_RFINT) { |
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174 | m8xx.fec.ievent = M8xx_FEC_IEVENT_RFINT; |
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175 | enet_driver[0].rxInterrupts++; |
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176 | rtems_event_send (enet_driver[0].rxDaemonTid, INTERRUPT_EVENT); |
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177 | } |
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178 | |
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179 | /* |
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180 | * Buffer transmitted or transmitter error? |
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181 | */ |
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182 | if (m8xx.fec.ievent & M8xx_FEC_IEVENT_TFINT) { |
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183 | m8xx.fec.ievent = M8xx_FEC_IEVENT_TFINT; |
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184 | enet_driver[0].txInterrupts++; |
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185 | rtems_event_send (enet_driver[0].txDaemonTid, INTERRUPT_EVENT); |
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186 | } |
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187 | } |
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188 | static rtems_irq_connect_data ethernetSCC1IrqData = { |
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189 | BSP_CPM_IRQ_SCC1, |
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190 | (rtems_irq_hdl) m860_scc1_interrupt_handler, |
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191 | (rtems_irq_enable) m8xx_scc1_ethernet_on, |
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192 | (rtems_irq_disable) m8xx_scc1_ethernet_off, |
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193 | (rtems_irq_is_enabled)m8xx_scc1_ethernet_isOn |
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194 | }; |
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195 | |
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196 | /* |
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197 | * Initialize the ethernet hardware |
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198 | */ |
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199 | static void |
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200 | m860_scc_initialize_hardware (struct m860_enet_struct *sc) |
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201 | { |
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202 | int i; |
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203 | unsigned char *hwaddr; |
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204 | rtems_status_code status; |
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205 | rtems_isr_entry old_handler; |
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206 | |
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207 | /* |
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208 | * Configure port A CLK1, CLK2, TXD1 and RXD1 pins |
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209 | */ |
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210 | m8xx.papar |= 0x303; |
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211 | m8xx.padir &= ~0x303; |
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212 | m8xx.paodr &= ~0x303; |
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213 | |
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214 | /* |
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215 | * Configure port C CTS1* and CD1* pins, and PC4-PC7 |
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216 | * |
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217 | */ |
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218 | m8xx.pcpar &= ~0x30; |
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219 | m8xx.pcdir |= 0x0f00; |
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220 | m8xx.pcdir &= ~0x30; |
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221 | m8xx.pcso |= 0x30; |
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222 | m8xx.pcdat &= ~0x0f00; /* Clear LOOP */ |
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223 | m8xx.pcdat |= 0x0700; /* Set FULDL, TPSQEL, TPAPCE */ |
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224 | |
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225 | /* |
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226 | * Connect CLK1 and CLK2 to SCC1 |
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227 | */ |
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228 | m8xx.sicr &= ~0xFF; |
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229 | m8xx.sicr |= (5 << 3) | 4; |
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230 | |
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231 | /* |
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232 | * Initialize SDMA configuration register |
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233 | */ |
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234 | m8xx.sdcr = 1; |
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235 | |
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236 | /* |
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237 | * Allocate mbuf pointers |
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238 | */ |
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239 | sc->rxMbuf = malloc (sc->rxBdCount * sizeof *sc->rxMbuf, |
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240 | M_MBUF, M_NOWAIT); |
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241 | sc->txMbuf = malloc (sc->txBdCount * sizeof *sc->txMbuf, |
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242 | M_MBUF, M_NOWAIT); |
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243 | if (!sc->rxMbuf || !sc->txMbuf) |
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244 | rtems_panic ("No memory for mbuf pointers"); |
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245 | |
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246 | /* |
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247 | * Set receiver and transmitter buffer descriptor bases |
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248 | */ |
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249 | sc->rxBdBase = m8xx_bd_allocate(sc->rxBdCount); |
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250 | sc->txBdBase = m8xx_bd_allocate(sc->txBdCount); |
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251 | m8xx.scc1p.rbase = (char *)sc->rxBdBase - (char *)&m8xx; |
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252 | m8xx.scc1p.tbase = (char *)sc->txBdBase - (char *)&m8xx; |
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253 | |
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254 | /* |
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255 | * Send "Init parameters" command |
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256 | */ |
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257 | m8xx_cp_execute_cmd (M8xx_CR_OP_INIT_RX_TX | M8xx_CR_CHAN_SCC1); |
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258 | |
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259 | /* |
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260 | * Set receive and transmit function codes |
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261 | */ |
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262 | m8xx.scc1p.rfcr = M8xx_RFCR_MOT | M8xx_RFCR_DMA_SPACE(0); |
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263 | m8xx.scc1p.tfcr = M8xx_TFCR_MOT | M8xx_TFCR_DMA_SPACE(0); |
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264 | |
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265 | /* |
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266 | * Set maximum receive buffer length |
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267 | */ |
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268 | m8xx.scc1p.mrblr = RBUF_SIZE; |
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269 | |
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270 | /* |
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271 | * Set CRC parameters |
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272 | */ |
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273 | m8xx.scc1p.un.ethernet.c_pres = 0xFFFFFFFF; |
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274 | m8xx.scc1p.un.ethernet.c_mask = 0xDEBB20E3; |
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275 | |
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276 | /* |
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277 | * Clear diagnostic counters |
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278 | */ |
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279 | m8xx.scc1p.un.ethernet.crcec = 0; |
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280 | m8xx.scc1p.un.ethernet.alec = 0; |
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281 | m8xx.scc1p.un.ethernet.disfc = 0; |
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282 | |
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283 | /* |
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284 | * Set pad value |
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285 | */ |
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286 | m8xx.scc1p.un.ethernet.pads = 0x8888; |
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287 | |
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288 | /* |
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289 | * Set retry limit |
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290 | */ |
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291 | m8xx.scc1p.un.ethernet.ret_lim = 15; |
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292 | |
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293 | /* |
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294 | * Set maximum and minimum frame length |
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295 | */ |
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296 | m8xx.scc1p.un.ethernet.mflr = 1518; |
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297 | m8xx.scc1p.un.ethernet.minflr = 64; |
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298 | m8xx.scc1p.un.ethernet.maxd1 = RBUF_SIZE; |
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299 | m8xx.scc1p.un.ethernet.maxd2 = RBUF_SIZE; |
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300 | |
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301 | /* |
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302 | * Clear group address hash table |
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303 | */ |
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304 | m8xx.scc1p.un.ethernet.gaddr1 = 0; |
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305 | m8xx.scc1p.un.ethernet.gaddr2 = 0; |
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306 | m8xx.scc1p.un.ethernet.gaddr3 = 0; |
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307 | m8xx.scc1p.un.ethernet.gaddr4 = 0; |
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308 | |
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309 | /* |
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310 | * Set our physical address |
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311 | */ |
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312 | hwaddr = sc->arpcom.ac_enaddr; |
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313 | |
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314 | m8xx.scc1p.un.ethernet.paddr_h = (hwaddr[5] << 8) | hwaddr[4]; |
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315 | m8xx.scc1p.un.ethernet.paddr_m = (hwaddr[3] << 8) | hwaddr[2]; |
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316 | m8xx.scc1p.un.ethernet.paddr_l = (hwaddr[1] << 8) | hwaddr[0]; |
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317 | |
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318 | /* |
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319 | * Aggressive retry |
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320 | */ |
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321 | m8xx.scc1p.un.ethernet.p_per = 0; |
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322 | |
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323 | /* |
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324 | * Clear individual address hash table |
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325 | */ |
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326 | m8xx.scc1p.un.ethernet.iaddr1 = 0; |
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327 | m8xx.scc1p.un.ethernet.iaddr2 = 0; |
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328 | m8xx.scc1p.un.ethernet.iaddr3 = 0; |
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329 | m8xx.scc1p.un.ethernet.iaddr4 = 0; |
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330 | |
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331 | /* |
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332 | * Clear temp address |
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333 | */ |
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334 | m8xx.scc1p.un.ethernet.taddr_l = 0; |
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335 | m8xx.scc1p.un.ethernet.taddr_m = 0; |
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336 | m8xx.scc1p.un.ethernet.taddr_h = 0; |
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337 | |
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338 | /* |
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339 | * Set up receive buffer descriptors |
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340 | */ |
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341 | for (i = 0 ; i < sc->rxBdCount ; i++) { |
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342 | (sc->rxBdBase + i)->status = 0; |
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343 | } |
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344 | |
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345 | /* |
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346 | * Set up transmit buffer descriptors |
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347 | */ |
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348 | for (i = 0 ; i < sc->txBdCount ; i++) { |
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349 | (sc->txBdBase + i)->status = 0; |
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350 | sc->txMbuf[i] = NULL; |
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351 | } |
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352 | sc->txBdHead = sc->txBdTail = 0; |
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353 | sc->txBdActiveCount = 0; |
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354 | |
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355 | /* |
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356 | * Clear any outstanding events |
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357 | */ |
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358 | m8xx.scc1.scce = 0xFFFF; |
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359 | |
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360 | /* |
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361 | * Set up interrupts |
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362 | */ |
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363 | if (!BSP_install_rtems_irq_handler (ðernetSCC1IrqData)) { |
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364 | rtems_panic ("Can't attach M8xx SCC1 interrupt handler\n"); |
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365 | } |
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366 | m8xx.scc1.sccm = 0; /* No interrupts unmasked till necessary */ |
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367 | |
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368 | /* |
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369 | * Set up General SCC Mode Register |
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370 | * Ethernet configuration |
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371 | */ |
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372 | m8xx.scc1.gsmr_h = 0x0; |
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373 | m8xx.scc1.gsmr_l = 0x1088000c; |
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374 | |
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375 | /* |
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376 | * Set up data synchronization register |
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377 | * Ethernet synchronization pattern |
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378 | */ |
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379 | m8xx.scc1.dsr = 0xd555; |
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380 | |
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381 | /* |
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382 | * Set up protocol-specific mode register |
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383 | * No Heartbeat check |
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384 | * No force collision |
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385 | * Discard short frames |
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386 | * Individual address mode |
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387 | * Ethernet CRC |
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388 | * Not promisuous |
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389 | * Ignore/accept broadcast packets as specified |
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390 | * Normal backoff timer |
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391 | * No loopback |
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392 | * No input sample at end of frame |
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393 | * 64-byte limit for late collision |
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394 | * Wait 22 bits before looking for start of frame delimiter |
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395 | * Disable full-duplex operation |
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396 | */ |
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397 | m8xx.scc1.psmr = 0x080A | (sc->acceptBroadcast ? 0 : 0x100); |
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398 | |
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399 | /* |
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400 | * Enable the TENA (RTS1*) pin |
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401 | */ |
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402 | m8xx.pcpar |= 0x1; |
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403 | m8xx.pcdir &= ~0x1; |
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404 | |
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405 | /* |
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406 | * Enable receiver and transmitter |
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407 | */ |
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408 | m8xx.scc1.gsmr_l = 0x1088003c; |
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409 | } |
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410 | static void m8xx_fec_ethernet_on(){}; |
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411 | static void m8xx_fec_ethernet_off(){}; |
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412 | static int m8xx_fec_ethernet_isOn (const rtems_irq_connect_data* ptr) |
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413 | { |
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414 | return BSP_irq_enabled_at_siu (ptr->name); |
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415 | } |
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416 | |
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417 | static rtems_irq_connect_data ethernetFECIrqData = { |
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418 | BSP_FAST_ETHERNET_CTRL, |
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419 | (rtems_irq_hdl) m860_fec_interrupt_handler, |
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420 | (rtems_irq_enable) m8xx_fec_ethernet_on, |
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421 | (rtems_irq_disable) m8xx_fec_ethernet_off, |
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422 | (rtems_irq_is_enabled)m8xx_fec_ethernet_isOn |
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423 | }; |
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424 | |
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425 | static void |
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426 | m860_fec_initialize_hardware (struct m860_enet_struct *sc) |
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427 | { |
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428 | int i; |
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429 | unsigned char *hwaddr; |
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430 | rtems_status_code status; |
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431 | rtems_isr_entry old_handler; |
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432 | |
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433 | /* |
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434 | * Issue reset to FEC |
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435 | */ |
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436 | m8xx.fec.ecntrl=0x1; |
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437 | |
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438 | /* |
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439 | * Put ethernet transciever in reset |
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440 | */ |
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441 | m8xx.pgcra |= 0x80; |
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442 | |
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443 | /* |
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444 | * Configure I/O ports |
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445 | */ |
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446 | m8xx.pdpar = 0x1fff; |
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447 | m8xx.pddir = 0x1c58; |
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448 | |
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449 | /* |
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450 | * Take ethernet transciever out of reset |
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451 | */ |
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452 | m8xx.pgcra &= ~0x80; |
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453 | |
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454 | |
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455 | /* |
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456 | * Set SIU interrupt level to LVL2 |
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457 | * |
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458 | */ |
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459 | m8xx.fec.ivec = ((((unsigned) BSP_FAST_ETHERNET_CTRL)/2) << 29); |
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460 | |
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461 | /* |
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462 | * Set the TX and RX fifo sizes. For now, we'll split it evenly |
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463 | */ |
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464 | /* If you uncomment these, the FEC will not work right. |
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465 | m8xx.fec.r_fstart = ((m8xx.fec.r_bound & 0x3ff) >> 2) & 0x3ff; |
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466 | m8xx.fec.x_fstart = 0; |
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467 | */ |
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468 | |
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469 | /* |
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470 | * Set our physical address |
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471 | */ |
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472 | hwaddr = sc->arpcom.ac_enaddr; |
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473 | |
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474 | m8xx.fec.addr_low = (hwaddr[0] << 24) | (hwaddr[1] << 16) | |
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475 | (hwaddr[2] << 8) | (hwaddr[3] << 0); |
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476 | m8xx.fec.addr_high = (hwaddr[4] << 24) | (hwaddr[5] << 16); |
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477 | |
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478 | /* |
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479 | * Clear the hash table |
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480 | */ |
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481 | m8xx.fec.hash_table_high = 0; |
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482 | m8xx.fec.hash_table_low = 0; |
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483 | |
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484 | /* |
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485 | * Set up receive buffer size |
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486 | */ |
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487 | m8xx.fec.r_buf_size = 0x5f0; /* set to 1520 */ |
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488 | |
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489 | /* |
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490 | * Allocate mbuf pointers |
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491 | */ |
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492 | sc->rxMbuf = malloc (sc->rxBdCount * sizeof *sc->rxMbuf, |
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493 | M_MBUF, M_NOWAIT); |
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494 | sc->txMbuf = malloc (sc->txBdCount * sizeof *sc->txMbuf, |
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495 | M_MBUF, M_NOWAIT); |
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496 | if (!sc->rxMbuf || !sc->txMbuf) |
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497 | rtems_panic ("No memory for mbuf pointers"); |
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498 | |
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499 | /* |
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500 | * Set receiver and transmitter buffer descriptor bases |
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501 | */ |
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502 | sc->rxBdBase = m8xx_bd_allocate(sc->rxBdCount); |
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503 | sc->txBdBase = m8xx_bd_allocate(sc->txBdCount); |
---|
504 | m8xx.fec.r_des_start = (int)sc->rxBdBase; |
---|
505 | m8xx.fec.x_des_start = (int)sc->txBdBase; |
---|
506 | |
---|
507 | /* |
---|
508 | * Set up Receive Control Register: |
---|
509 | * Not promiscuous mode |
---|
510 | * MII mode |
---|
511 | * Half duplex |
---|
512 | * No loopback |
---|
513 | */ |
---|
514 | m8xx.fec.r_cntrl = 0x00000006; |
---|
515 | |
---|
516 | /* |
---|
517 | * Set up Transmit Control Register: |
---|
518 | * Half duplex |
---|
519 | * No heartbeat |
---|
520 | */ |
---|
521 | m8xx.fec.x_cntrl = 0x00000000; |
---|
522 | |
---|
523 | /* |
---|
524 | * Set up DMA function code: |
---|
525 | * Big-endian |
---|
526 | * DMA functino code = 0 |
---|
527 | */ |
---|
528 | m8xx.fec.fun_code = 0x78000000; |
---|
529 | |
---|
530 | /* |
---|
531 | * Initialize SDMA configuration register |
---|
532 | * SDMA ignores FRZ |
---|
533 | * FEC not aggressive |
---|
534 | * FEC arbitration ID = 0 => U-bus arbitration = 6 |
---|
535 | * RISC arbitration ID = 1 => U-bus arbitration = 5 |
---|
536 | */ |
---|
537 | m8xx.sdcr = 1; |
---|
538 | |
---|
539 | /* |
---|
540 | * Set MII speed to 2.5 MHz for 25 Mhz system clock |
---|
541 | */ |
---|
542 | m8xx.fec.mii_speed = 0x0a; |
---|
543 | m8xx.fec.mii_data = 0x58021000; |
---|
544 | |
---|
545 | /* |
---|
546 | * Set up receive buffer descriptors |
---|
547 | */ |
---|
548 | for (i = 0 ; i < sc->rxBdCount ; i++) |
---|
549 | (sc->rxBdBase + i)->status = 0; |
---|
550 | |
---|
551 | /* |
---|
552 | * Set up transmit buffer descriptors |
---|
553 | */ |
---|
554 | for (i = 0 ; i < sc->txBdCount ; i++) { |
---|
555 | (sc->txBdBase + i)->status = 0; |
---|
556 | sc->txMbuf[i] = NULL; |
---|
557 | } |
---|
558 | sc->txBdHead = sc->txBdTail = 0; |
---|
559 | sc->txBdActiveCount = 0; |
---|
560 | |
---|
561 | |
---|
562 | |
---|
563 | /* |
---|
564 | * Mask all FEC interrupts and clear events |
---|
565 | */ |
---|
566 | m8xx.fec.imask = M8xx_FEC_IEVENT_TFINT | |
---|
567 | M8xx_FEC_IEVENT_RFINT; |
---|
568 | m8xx.fec.ievent = ~0; |
---|
569 | |
---|
570 | /* |
---|
571 | * Set up interrupts |
---|
572 | */ |
---|
573 | if (!BSP_install_rtems_irq_handler (ðernetFECIrqData)) |
---|
574 | rtems_panic ("Can't attach M860 FEC interrupt handler\n"); |
---|
575 | |
---|
576 | } |
---|
577 | |
---|
578 | |
---|
579 | /* |
---|
580 | * Soak up buffer descriptors that have been sent |
---|
581 | * Note that a buffer descriptor can't be retired as soon as it becomes |
---|
582 | * ready. The MC68360 Errata (May 96) says that, "If an Ethernet frame is |
---|
583 | * made up of multiple buffers, the user should not reuse the first buffer |
---|
584 | * descriptor until the last buffer descriptor of the frame has had its |
---|
585 | * ready bit cleared by the CPM". |
---|
586 | */ |
---|
587 | static void |
---|
588 | m860Enet_retire_tx_bd (struct m860_enet_struct *sc) |
---|
589 | { |
---|
590 | rtems_unsigned16 status; |
---|
591 | int i; |
---|
592 | int nRetired; |
---|
593 | struct mbuf *m, *n; |
---|
594 | |
---|
595 | i = sc->txBdTail; |
---|
596 | nRetired = 0; |
---|
597 | while ((sc->txBdActiveCount != 0) |
---|
598 | && (((status = (sc->txBdBase + i)->status) & M8xx_BD_READY) == 0)) { |
---|
599 | /* |
---|
600 | * See if anything went wrong |
---|
601 | */ |
---|
602 | if (status & (M8xx_BD_DEFER | |
---|
603 | M8xx_BD_HEARTBEAT | |
---|
604 | M8xx_BD_LATE_COLLISION | |
---|
605 | M8xx_BD_RETRY_LIMIT | |
---|
606 | M8xx_BD_UNDERRUN | |
---|
607 | M8xx_BD_CARRIER_LOST)) { |
---|
608 | /* |
---|
609 | * Check for errors which stop the transmitter. |
---|
610 | */ |
---|
611 | if (status & (M8xx_BD_LATE_COLLISION | |
---|
612 | M8xx_BD_RETRY_LIMIT | |
---|
613 | M8xx_BD_UNDERRUN)) { |
---|
614 | if (status & M8xx_BD_LATE_COLLISION) |
---|
615 | enet_driver[0].txLateCollision++; |
---|
616 | if (status & M8xx_BD_RETRY_LIMIT) |
---|
617 | enet_driver[0].txRetryLimit++; |
---|
618 | if (status & M8xx_BD_UNDERRUN) |
---|
619 | enet_driver[0].txUnderrun++; |
---|
620 | |
---|
621 | /* |
---|
622 | * Restart the transmitter |
---|
623 | */ |
---|
624 | /* FIXME: this should get executed only if using the SCC */ |
---|
625 | m8xx_cp_execute_cmd (M8xx_CR_OP_RESTART_TX | M8xx_CR_CHAN_SCC1); |
---|
626 | } |
---|
627 | if (status & M8xx_BD_DEFER) |
---|
628 | enet_driver[0].txDeferred++; |
---|
629 | if (status & M8xx_BD_HEARTBEAT) |
---|
630 | enet_driver[0].txHeartbeat++; |
---|
631 | if (status & M8xx_BD_CARRIER_LOST) |
---|
632 | enet_driver[0].txLostCarrier++; |
---|
633 | } |
---|
634 | nRetired++; |
---|
635 | if (status & M8xx_BD_LAST) { |
---|
636 | /* |
---|
637 | * A full frame has been transmitted. |
---|
638 | * Free all the associated buffer descriptors. |
---|
639 | */ |
---|
640 | sc->txBdActiveCount -= nRetired; |
---|
641 | while (nRetired) { |
---|
642 | nRetired--; |
---|
643 | m = sc->txMbuf[sc->txBdTail]; |
---|
644 | MFREE (m, n); |
---|
645 | if (++sc->txBdTail == sc->txBdCount) |
---|
646 | sc->txBdTail = 0; |
---|
647 | } |
---|
648 | } |
---|
649 | if (++i == sc->txBdCount) |
---|
650 | i = 0; |
---|
651 | } |
---|
652 | } |
---|
653 | |
---|
654 | /* |
---|
655 | * reader task |
---|
656 | */ |
---|
657 | static void |
---|
658 | scc_rxDaemon (void *arg) |
---|
659 | { |
---|
660 | struct m860_enet_struct *sc = (struct m860_enet_struct *)arg; |
---|
661 | struct ifnet *ifp = &sc->arpcom.ac_if; |
---|
662 | struct mbuf *m; |
---|
663 | rtems_unsigned16 status; |
---|
664 | m8xxBufferDescriptor_t *rxBd; |
---|
665 | int rxBdIndex; |
---|
666 | |
---|
667 | /* |
---|
668 | * Allocate space for incoming packets and start reception |
---|
669 | */ |
---|
670 | for (rxBdIndex = 0 ; ;) { |
---|
671 | rxBd = sc->rxBdBase + rxBdIndex; |
---|
672 | MGETHDR (m, M_WAIT, MT_DATA); |
---|
673 | MCLGET (m, M_WAIT); |
---|
674 | m->m_pkthdr.rcvif = ifp; |
---|
675 | sc->rxMbuf[rxBdIndex] = m; |
---|
676 | rxBd->buffer = mtod (m, void *); |
---|
677 | rxBd->status = M8xx_BD_EMPTY | M8xx_BD_INTERRUPT; |
---|
678 | if (++rxBdIndex == sc->rxBdCount) { |
---|
679 | rxBd->status |= M8xx_BD_WRAP; |
---|
680 | break; |
---|
681 | } |
---|
682 | } |
---|
683 | |
---|
684 | /* |
---|
685 | * Input packet handling loop |
---|
686 | */ |
---|
687 | rxBdIndex = 0; |
---|
688 | for (;;) { |
---|
689 | rxBd = sc->rxBdBase + rxBdIndex; |
---|
690 | |
---|
691 | /* |
---|
692 | * Wait for packet if there's not one ready |
---|
693 | */ |
---|
694 | if ((status = rxBd->status) & M8xx_BD_EMPTY) { |
---|
695 | /* |
---|
696 | * Clear old events |
---|
697 | */ |
---|
698 | m8xx.scc1.scce = 0x8; |
---|
699 | |
---|
700 | /* |
---|
701 | * Wait for packet |
---|
702 | * Note that the buffer descriptor is checked |
---|
703 | * *before* the event wait -- this catches the |
---|
704 | * possibility that a packet arrived between the |
---|
705 | * `if' above, and the clearing of the event register. |
---|
706 | */ |
---|
707 | while ((status = rxBd->status) & M8xx_BD_EMPTY) { |
---|
708 | rtems_event_set events; |
---|
709 | |
---|
710 | /* |
---|
711 | * Unmask RXF (Full frame received) event |
---|
712 | */ |
---|
713 | m8xx.scc1.sccm |= 0x8; |
---|
714 | |
---|
715 | rtems_bsdnet_event_receive (INTERRUPT_EVENT, |
---|
716 | RTEMS_WAIT|RTEMS_EVENT_ANY, |
---|
717 | RTEMS_NO_TIMEOUT, |
---|
718 | &events); |
---|
719 | } |
---|
720 | } |
---|
721 | |
---|
722 | /* |
---|
723 | * Check that packet is valid |
---|
724 | */ |
---|
725 | if ((status & (M8xx_BD_LAST | |
---|
726 | M8xx_BD_FIRST_IN_FRAME | |
---|
727 | M8xx_BD_LONG | |
---|
728 | M8xx_BD_NONALIGNED | |
---|
729 | M8xx_BD_SHORT | |
---|
730 | M8xx_BD_CRC_ERROR | |
---|
731 | M8xx_BD_OVERRUN | |
---|
732 | M8xx_BD_COLLISION)) == |
---|
733 | (M8xx_BD_LAST | |
---|
734 | M8xx_BD_FIRST_IN_FRAME)) { |
---|
735 | /* |
---|
736 | * Pass the packet up the chain. |
---|
737 | * FIXME: Packet filtering hook could be done here. |
---|
738 | */ |
---|
739 | struct ether_header *eh; |
---|
740 | |
---|
741 | m = sc->rxMbuf[rxBdIndex]; |
---|
742 | m->m_len = m->m_pkthdr.len = rxBd->length - |
---|
743 | sizeof(rtems_unsigned32) - |
---|
744 | sizeof(struct ether_header); |
---|
745 | eh = mtod (m, struct ether_header *); |
---|
746 | m->m_data += sizeof(struct ether_header); |
---|
747 | ether_input (ifp, eh, m); |
---|
748 | |
---|
749 | /* |
---|
750 | * Allocate a new mbuf |
---|
751 | */ |
---|
752 | MGETHDR (m, M_WAIT, MT_DATA); |
---|
753 | MCLGET (m, M_WAIT); |
---|
754 | m->m_pkthdr.rcvif = ifp; |
---|
755 | sc->rxMbuf[rxBdIndex] = m; |
---|
756 | rxBd->buffer = mtod (m, void *); |
---|
757 | } |
---|
758 | else { |
---|
759 | /* |
---|
760 | * Something went wrong with the reception |
---|
761 | */ |
---|
762 | if (!(status & M8xx_BD_LAST)) |
---|
763 | sc->rxNotLast++; |
---|
764 | if (!(status & M8xx_BD_FIRST_IN_FRAME)) |
---|
765 | sc->rxNotFirst++; |
---|
766 | if (status & M8xx_BD_LONG) |
---|
767 | sc->rxGiant++; |
---|
768 | if (status & M8xx_BD_NONALIGNED) |
---|
769 | sc->rxNonOctet++; |
---|
770 | if (status & M8xx_BD_SHORT) |
---|
771 | sc->rxRunt++; |
---|
772 | if (status & M8xx_BD_CRC_ERROR) |
---|
773 | sc->rxBadCRC++; |
---|
774 | if (status & M8xx_BD_OVERRUN) |
---|
775 | sc->rxOverrun++; |
---|
776 | if (status & M8xx_BD_COLLISION) |
---|
777 | sc->rxCollision++; |
---|
778 | } |
---|
779 | |
---|
780 | /* |
---|
781 | * Reenable the buffer descriptor |
---|
782 | */ |
---|
783 | rxBd->status = (status & (M8xx_BD_WRAP | M8xx_BD_INTERRUPT)) | |
---|
784 | M8xx_BD_EMPTY; |
---|
785 | |
---|
786 | /* |
---|
787 | * Move to next buffer descriptor |
---|
788 | */ |
---|
789 | if (++rxBdIndex == sc->rxBdCount) |
---|
790 | rxBdIndex = 0; |
---|
791 | } |
---|
792 | } |
---|
793 | |
---|
794 | static void |
---|
795 | fec_rxDaemon (void *arg) |
---|
796 | { |
---|
797 | struct m860_enet_struct *sc = (struct m860_enet_struct *)arg; |
---|
798 | struct ifnet *ifp = &sc->arpcom.ac_if; |
---|
799 | struct mbuf *m; |
---|
800 | rtems_unsigned16 status; |
---|
801 | m8xxBufferDescriptor_t *rxBd; |
---|
802 | int rxBdIndex; |
---|
803 | |
---|
804 | /* |
---|
805 | * Allocate space for incoming packets and start reception |
---|
806 | */ |
---|
807 | for (rxBdIndex = 0 ; ;) { |
---|
808 | rxBd = sc->rxBdBase + rxBdIndex; |
---|
809 | MGETHDR (m, M_WAIT, MT_DATA); |
---|
810 | MCLGET (m, M_WAIT); |
---|
811 | m->m_pkthdr.rcvif = ifp; |
---|
812 | sc->rxMbuf[rxBdIndex] = m; |
---|
813 | rxBd->buffer = mtod (m, void *); |
---|
814 | rxBd->status = M8xx_BD_EMPTY; |
---|
815 | m8xx.fec.r_des_active = 0x1000000; |
---|
816 | if (++rxBdIndex == sc->rxBdCount) { |
---|
817 | rxBd->status |= M8xx_BD_WRAP; |
---|
818 | break; |
---|
819 | } |
---|
820 | } |
---|
821 | |
---|
822 | /* |
---|
823 | * Input packet handling loop |
---|
824 | */ |
---|
825 | rxBdIndex = 0; |
---|
826 | for (;;) { |
---|
827 | rxBd = sc->rxBdBase + rxBdIndex; |
---|
828 | |
---|
829 | /* |
---|
830 | * Wait for packet if there's not one ready |
---|
831 | */ |
---|
832 | if ((status = rxBd->status) & M8xx_BD_EMPTY) { |
---|
833 | /* |
---|
834 | * Clear old events |
---|
835 | */ |
---|
836 | m8xx.fec.ievent = M8xx_FEC_IEVENT_RFINT; |
---|
837 | |
---|
838 | /* |
---|
839 | * Wait for packet |
---|
840 | * Note that the buffer descriptor is checked |
---|
841 | * *before* the event wait -- this catches the |
---|
842 | * possibility that a packet arrived between the |
---|
843 | * `if' above, and the clearing of the event register. |
---|
844 | */ |
---|
845 | while ((status = rxBd->status) & M8xx_BD_EMPTY) { |
---|
846 | rtems_event_set events; |
---|
847 | |
---|
848 | /* |
---|
849 | * Unmask RXF (Full frame received) event |
---|
850 | */ |
---|
851 | m8xx.fec.ievent |= M8xx_FEC_IEVENT_RFINT; |
---|
852 | |
---|
853 | rtems_bsdnet_event_receive (INTERRUPT_EVENT, |
---|
854 | RTEMS_WAIT|RTEMS_EVENT_ANY, |
---|
855 | RTEMS_NO_TIMEOUT, |
---|
856 | &events); |
---|
857 | } |
---|
858 | } |
---|
859 | |
---|
860 | /* |
---|
861 | * Check that packet is valid |
---|
862 | */ |
---|
863 | if (status & M8xx_BD_LAST) { |
---|
864 | /* |
---|
865 | * Pass the packet up the chain. |
---|
866 | * FIXME: Packet filtering hook could be done here. |
---|
867 | */ |
---|
868 | struct ether_header *eh; |
---|
869 | |
---|
870 | m = sc->rxMbuf[rxBdIndex]; |
---|
871 | m->m_len = m->m_pkthdr.len = rxBd->length - |
---|
872 | sizeof(rtems_unsigned32) - |
---|
873 | sizeof(struct ether_header); |
---|
874 | eh = mtod (m, struct ether_header *); |
---|
875 | m->m_data += sizeof(struct ether_header); |
---|
876 | ether_input (ifp, eh, m); |
---|
877 | |
---|
878 | /* |
---|
879 | * Allocate a new mbuf |
---|
880 | */ |
---|
881 | MGETHDR (m, M_WAIT, MT_DATA); |
---|
882 | MCLGET (m, M_WAIT); |
---|
883 | m->m_pkthdr.rcvif = ifp; |
---|
884 | sc->rxMbuf[rxBdIndex] = m; |
---|
885 | rxBd->buffer = mtod (m, void *); |
---|
886 | } |
---|
887 | else { |
---|
888 | /* |
---|
889 | * Something went wrong with the reception |
---|
890 | */ |
---|
891 | if (!(status & M8xx_BD_LAST)) |
---|
892 | sc->rxNotLast++; |
---|
893 | if (status & M8xx_BD_LONG) |
---|
894 | sc->rxGiant++; |
---|
895 | if (status & M8xx_BD_NONALIGNED) |
---|
896 | sc->rxNonOctet++; |
---|
897 | if (status & M8xx_BD_SHORT) |
---|
898 | sc->rxRunt++; |
---|
899 | if (status & M8xx_BD_CRC_ERROR) |
---|
900 | sc->rxBadCRC++; |
---|
901 | if (status & M8xx_BD_OVERRUN) |
---|
902 | sc->rxOverrun++; |
---|
903 | if (status & M8xx_BD_COLLISION) |
---|
904 | sc->rxCollision++; |
---|
905 | } |
---|
906 | /* |
---|
907 | * Reenable the buffer descriptor |
---|
908 | */ |
---|
909 | rxBd->status = (status & M8xx_BD_WRAP) | |
---|
910 | M8xx_BD_EMPTY; |
---|
911 | m8xx.fec.r_des_active = 0x1000000; |
---|
912 | /* |
---|
913 | * Move to next buffer descriptor |
---|
914 | */ |
---|
915 | if (++rxBdIndex == sc->rxBdCount) |
---|
916 | rxBdIndex = 0; |
---|
917 | } |
---|
918 | } |
---|
919 | |
---|
920 | static void |
---|
921 | scc_sendpacket (struct ifnet *ifp, struct mbuf *m) |
---|
922 | { |
---|
923 | struct m860_enet_struct *sc = ifp->if_softc; |
---|
924 | volatile m8xxBufferDescriptor_t *firstTxBd, *txBd; |
---|
925 | struct mbuf *l = NULL; |
---|
926 | rtems_unsigned16 status; |
---|
927 | int nAdded; |
---|
928 | |
---|
929 | /* |
---|
930 | * Free up buffer descriptors |
---|
931 | */ |
---|
932 | m860Enet_retire_tx_bd (sc); |
---|
933 | |
---|
934 | /* |
---|
935 | * Set up the transmit buffer descriptors. |
---|
936 | * No need to pad out short packets since the |
---|
937 | * hardware takes care of that automatically. |
---|
938 | * No need to copy the packet to a contiguous buffer |
---|
939 | * since the hardware is capable of scatter/gather DMA. |
---|
940 | */ |
---|
941 | nAdded = 0; |
---|
942 | txBd = firstTxBd = sc->txBdBase + sc->txBdHead; |
---|
943 | for (;;) { |
---|
944 | /* |
---|
945 | * Wait for buffer descriptor to become available. |
---|
946 | */ |
---|
947 | if ((sc->txBdActiveCount + nAdded) == sc->txBdCount) { |
---|
948 | /* |
---|
949 | * Clear old events |
---|
950 | */ |
---|
951 | m8xx.scc1.scce = 0x12; |
---|
952 | |
---|
953 | /* |
---|
954 | * Wait for buffer descriptor to become available. |
---|
955 | * Note that the buffer descriptors are checked |
---|
956 | * *before* * entering the wait loop -- this catches |
---|
957 | * the possibility that a buffer descriptor became |
---|
958 | * available between the `if' above, and the clearing |
---|
959 | * of the event register. |
---|
960 | * This is to catch the case where the transmitter |
---|
961 | * stops in the middle of a frame -- and only the |
---|
962 | * last buffer descriptor in a frame can generate |
---|
963 | * an interrupt. |
---|
964 | */ |
---|
965 | m860Enet_retire_tx_bd (sc); |
---|
966 | while ((sc->txBdActiveCount + nAdded) == sc->txBdCount) { |
---|
967 | rtems_event_set events; |
---|
968 | |
---|
969 | /* |
---|
970 | * Unmask TXB (buffer transmitted) and |
---|
971 | * TXE (transmitter error) events. |
---|
972 | */ |
---|
973 | m8xx.scc1.sccm |= 0x12; |
---|
974 | rtems_bsdnet_event_receive (INTERRUPT_EVENT, |
---|
975 | RTEMS_WAIT|RTEMS_EVENT_ANY, |
---|
976 | RTEMS_NO_TIMEOUT, |
---|
977 | &events); |
---|
978 | m860Enet_retire_tx_bd (sc); |
---|
979 | } |
---|
980 | } |
---|
981 | |
---|
982 | /* |
---|
983 | * Don't set the READY flag till the |
---|
984 | * whole packet has been readied. |
---|
985 | */ |
---|
986 | status = nAdded ? M8xx_BD_READY : 0; |
---|
987 | |
---|
988 | /* |
---|
989 | * FIXME: Why not deal with empty mbufs at at higher level? |
---|
990 | * The IP fragmentation routine in ip_output |
---|
991 | * can produce packet fragments with zero length. |
---|
992 | * I think that ip_output should be changed to get |
---|
993 | * rid of these zero-length mbufs, but for now, |
---|
994 | * I'll deal with them here. |
---|
995 | */ |
---|
996 | if (m->m_len) { |
---|
997 | /* |
---|
998 | * Fill in the buffer descriptor |
---|
999 | */ |
---|
1000 | txBd->buffer = mtod (m, void *); |
---|
1001 | txBd->length = m->m_len; |
---|
1002 | sc->txMbuf[sc->txBdHead] = m; |
---|
1003 | nAdded++; |
---|
1004 | if (++sc->txBdHead == sc->txBdCount) { |
---|
1005 | status |= M8xx_BD_WRAP; |
---|
1006 | sc->txBdHead = 0; |
---|
1007 | } |
---|
1008 | l = m; |
---|
1009 | m = m->m_next; |
---|
1010 | } |
---|
1011 | else { |
---|
1012 | /* |
---|
1013 | * Just toss empty mbufs |
---|
1014 | */ |
---|
1015 | struct mbuf *n; |
---|
1016 | MFREE (m, n); |
---|
1017 | m = n; |
---|
1018 | if (l != NULL) |
---|
1019 | l->m_next = m; |
---|
1020 | } |
---|
1021 | |
---|
1022 | /* |
---|
1023 | * Set the transmit buffer status. |
---|
1024 | * Break out of the loop if this mbuf is the last in the frame. |
---|
1025 | */ |
---|
1026 | if (m == NULL) { |
---|
1027 | if (nAdded) { |
---|
1028 | status |= M8xx_BD_PAD | M8xx_BD_LAST | M8xx_BD_TX_CRC | M8xx_BD_INTERRUPT; |
---|
1029 | txBd->status = status; |
---|
1030 | firstTxBd->status |= M8xx_BD_READY; |
---|
1031 | sc->txBdActiveCount += nAdded; |
---|
1032 | } |
---|
1033 | break; |
---|
1034 | } |
---|
1035 | txBd->status = status; |
---|
1036 | txBd = sc->txBdBase + sc->txBdHead; |
---|
1037 | } |
---|
1038 | } |
---|
1039 | |
---|
1040 | static void |
---|
1041 | fec_sendpacket (struct ifnet *ifp, struct mbuf *m) |
---|
1042 | { |
---|
1043 | struct m860_enet_struct *sc = ifp->if_softc; |
---|
1044 | volatile m8xxBufferDescriptor_t *firstTxBd, *txBd; |
---|
1045 | /* struct mbuf *l = NULL; */ |
---|
1046 | rtems_unsigned16 status; |
---|
1047 | int nAdded; |
---|
1048 | |
---|
1049 | /* |
---|
1050 | * Free up buffer descriptors |
---|
1051 | */ |
---|
1052 | m8xxEnet_retire_tx_bd (sc); |
---|
1053 | |
---|
1054 | /* |
---|
1055 | * Set up the transmit buffer descriptors. |
---|
1056 | * No need to pad out short packets since the |
---|
1057 | * hardware takes care of that automatically. |
---|
1058 | * No need to copy the packet to a contiguous buffer |
---|
1059 | * since the hardware is capable of scatter/gather DMA. |
---|
1060 | */ |
---|
1061 | nAdded = 0; |
---|
1062 | txBd = firstTxBd = sc->txBdBase + sc->txBdHead; |
---|
1063 | for (;;) { |
---|
1064 | /* |
---|
1065 | * Wait for buffer descriptor to become available. |
---|
1066 | */ |
---|
1067 | if ((sc->txBdActiveCount + nAdded) == sc->txBdCount) { |
---|
1068 | /* |
---|
1069 | * Clear old events |
---|
1070 | */ |
---|
1071 | m8xx.fec.ievent = M8xx_FEC_IEVENT_TFINT; |
---|
1072 | |
---|
1073 | /* |
---|
1074 | * Wait for buffer descriptor to become available. |
---|
1075 | * Note that the buffer descriptors are checked |
---|
1076 | * *before* * entering the wait loop -- this catches |
---|
1077 | * the possibility that a buffer descriptor became |
---|
1078 | * available between the `if' above, and the clearing |
---|
1079 | * of the event register. |
---|
1080 | * This is to catch the case where the transmitter |
---|
1081 | * stops in the middle of a frame -- and only the |
---|
1082 | * last buffer descriptor in a frame can generate |
---|
1083 | * an interrupt. |
---|
1084 | */ |
---|
1085 | m860Enet_retire_tx_bd (sc); |
---|
1086 | while ((sc->txBdActiveCount + nAdded) == sc->txBdCount) { |
---|
1087 | rtems_event_set events; |
---|
1088 | |
---|
1089 | /* |
---|
1090 | * Unmask TXB (buffer transmitted) and |
---|
1091 | * TXE (transmitter error) events. |
---|
1092 | */ |
---|
1093 | m8xx.fec.ievent |= M8xx_FEC_IEVENT_TFINT; |
---|
1094 | rtems_bsdnet_event_receive (INTERRUPT_EVENT, |
---|
1095 | RTEMS_WAIT|RTEMS_EVENT_ANY, |
---|
1096 | RTEMS_NO_TIMEOUT, |
---|
1097 | &events); |
---|
1098 | m860Enet_retire_tx_bd (sc); |
---|
1099 | } |
---|
1100 | } |
---|
1101 | |
---|
1102 | /* |
---|
1103 | * Don't set the READY flag till the |
---|
1104 | * whole packet has been readied. |
---|
1105 | */ |
---|
1106 | status = nAdded ? M8xx_BD_READY : 0; |
---|
1107 | |
---|
1108 | /* |
---|
1109 | * FIXME: Why not deal with empty mbufs at at higher level? |
---|
1110 | * The IP fragmentation routine in ip_output |
---|
1111 | * can produce packet fragments with zero length. |
---|
1112 | * I think that ip_output should be changed to get |
---|
1113 | * rid of these zero-length mbufs, but for now, |
---|
1114 | * I'll deal with them here. |
---|
1115 | */ |
---|
1116 | if (m->m_len) { |
---|
1117 | /* |
---|
1118 | * Fill in the buffer descriptor |
---|
1119 | */ |
---|
1120 | txBd->buffer = mtod (m, void *); |
---|
1121 | txBd->length = m->m_len; |
---|
1122 | sc->txMbuf[sc->txBdHead] = m; |
---|
1123 | nAdded++; |
---|
1124 | if (++sc->txBdHead == sc->txBdCount) { |
---|
1125 | status |= M8xx_BD_WRAP; |
---|
1126 | sc->txBdHead = 0; |
---|
1127 | } |
---|
1128 | /* l = m;*/ |
---|
1129 | m = m->m_next; |
---|
1130 | } |
---|
1131 | else { |
---|
1132 | /* |
---|
1133 | * Just toss empty mbufs |
---|
1134 | */ |
---|
1135 | struct mbuf *n; |
---|
1136 | MFREE (m, n); |
---|
1137 | m = n; |
---|
1138 | /* |
---|
1139 | if (l != NULL) |
---|
1140 | l->m_next = m; |
---|
1141 | */ |
---|
1142 | } |
---|
1143 | |
---|
1144 | /* |
---|
1145 | * Set the transmit buffer status. |
---|
1146 | * Break out of the loop if this mbuf is the last in the frame. |
---|
1147 | */ |
---|
1148 | if (m == NULL) { |
---|
1149 | if (nAdded) { |
---|
1150 | status |= M8xx_BD_LAST | M8xx_BD_TX_CRC; |
---|
1151 | txBd->status = status; |
---|
1152 | firstTxBd->status |= M8xx_BD_READY; |
---|
1153 | m8xx.fec.x_des_active = 0x1000000; |
---|
1154 | sc->txBdActiveCount += nAdded; |
---|
1155 | } |
---|
1156 | break; |
---|
1157 | } |
---|
1158 | txBd->status = status; |
---|
1159 | txBd = sc->txBdBase + sc->txBdHead; |
---|
1160 | } |
---|
1161 | } |
---|
1162 | |
---|
1163 | /* |
---|
1164 | * Driver transmit daemon |
---|
1165 | */ |
---|
1166 | void |
---|
1167 | scc_txDaemon (void *arg) |
---|
1168 | { |
---|
1169 | struct m860_enet_struct *sc = (struct m860_enet_struct *)arg; |
---|
1170 | struct ifnet *ifp = &sc->arpcom.ac_if; |
---|
1171 | struct mbuf *m; |
---|
1172 | rtems_event_set events; |
---|
1173 | |
---|
1174 | for (;;) { |
---|
1175 | /* |
---|
1176 | * Wait for packet |
---|
1177 | */ |
---|
1178 | rtems_bsdnet_event_receive (START_TRANSMIT_EVENT, RTEMS_EVENT_ANY | RTEMS_WAIT, RTEMS_NO_TIMEOUT, &events); |
---|
1179 | |
---|
1180 | /* |
---|
1181 | * Send packets till queue is empty |
---|
1182 | */ |
---|
1183 | for (;;) { |
---|
1184 | /* |
---|
1185 | * Get the next mbuf chain to transmit. |
---|
1186 | */ |
---|
1187 | IF_DEQUEUE(&ifp->if_snd, m); |
---|
1188 | if (!m) |
---|
1189 | break; |
---|
1190 | scc_sendpacket (ifp, m); |
---|
1191 | } |
---|
1192 | ifp->if_flags &= ~IFF_OACTIVE; |
---|
1193 | } |
---|
1194 | } |
---|
1195 | |
---|
1196 | void |
---|
1197 | fec_txDaemon (void *arg) |
---|
1198 | { |
---|
1199 | struct m860_enet_struct *sc = (struct m860_enet_struct *)arg; |
---|
1200 | struct ifnet *ifp = &sc->arpcom.ac_if; |
---|
1201 | struct mbuf *m; |
---|
1202 | rtems_event_set events; |
---|
1203 | |
---|
1204 | for (;;) { |
---|
1205 | /* |
---|
1206 | * Wait for packet |
---|
1207 | */ |
---|
1208 | rtems_bsdnet_event_receive (START_TRANSMIT_EVENT, |
---|
1209 | RTEMS_EVENT_ANY | RTEMS_WAIT, |
---|
1210 | RTEMS_NO_TIMEOUT, |
---|
1211 | &events); |
---|
1212 | |
---|
1213 | /* |
---|
1214 | * Send packets till queue is empty |
---|
1215 | */ |
---|
1216 | for (;;) { |
---|
1217 | /* |
---|
1218 | * Get the next mbuf chain to transmit. |
---|
1219 | */ |
---|
1220 | IF_DEQUEUE(&ifp->if_snd, m); |
---|
1221 | if (!m) |
---|
1222 | break; |
---|
1223 | fec_sendpacket (ifp, m); |
---|
1224 | } |
---|
1225 | ifp->if_flags &= ~IFF_OACTIVE; |
---|
1226 | } |
---|
1227 | } |
---|
1228 | |
---|
1229 | /* |
---|
1230 | * Send packet (caller provides header). |
---|
1231 | */ |
---|
1232 | static void |
---|
1233 | m860_enet_start (struct ifnet *ifp) |
---|
1234 | { |
---|
1235 | struct m860_enet_struct *sc = ifp->if_softc; |
---|
1236 | |
---|
1237 | rtems_event_send (sc->txDaemonTid, START_TRANSMIT_EVENT); |
---|
1238 | ifp->if_flags |= IFF_OACTIVE; |
---|
1239 | } |
---|
1240 | |
---|
1241 | /* |
---|
1242 | * Initialize and start the device |
---|
1243 | */ |
---|
1244 | static void |
---|
1245 | scc_init (void *arg) |
---|
1246 | { |
---|
1247 | struct m860_enet_struct *sc = arg; |
---|
1248 | struct ifnet *ifp = &sc->arpcom.ac_if; |
---|
1249 | |
---|
1250 | if (sc->txDaemonTid == 0) { |
---|
1251 | |
---|
1252 | /* |
---|
1253 | * Set up SCC hardware |
---|
1254 | */ |
---|
1255 | m860_scc_initialize_hardware (sc); |
---|
1256 | |
---|
1257 | /* |
---|
1258 | * Start driver tasks |
---|
1259 | */ |
---|
1260 | sc->txDaemonTid = rtems_bsdnet_newproc ("SCtx", 4096, scc_txDaemon, sc); |
---|
1261 | sc->rxDaemonTid = rtems_bsdnet_newproc ("SCrx", 4096, scc_rxDaemon, sc); |
---|
1262 | |
---|
1263 | } |
---|
1264 | |
---|
1265 | /* |
---|
1266 | * Set flags appropriately |
---|
1267 | */ |
---|
1268 | if (ifp->if_flags & IFF_PROMISC) |
---|
1269 | m8xx.scc1.psmr |= 0x200; |
---|
1270 | else |
---|
1271 | m8xx.scc1.psmr &= ~0x200; |
---|
1272 | |
---|
1273 | /* |
---|
1274 | * Tell the world that we're running. |
---|
1275 | */ |
---|
1276 | ifp->if_flags |= IFF_RUNNING; |
---|
1277 | |
---|
1278 | /* |
---|
1279 | * Enable receiver and transmitter |
---|
1280 | */ |
---|
1281 | m8xx.scc1.gsmr_l |= 0x30; |
---|
1282 | } |
---|
1283 | |
---|
1284 | static void |
---|
1285 | fec_init (void *arg) |
---|
1286 | { |
---|
1287 | struct m860_enet_struct *sc = arg; |
---|
1288 | struct ifnet *ifp = &sc->arpcom.ac_if; |
---|
1289 | |
---|
1290 | if (sc->txDaemonTid == 0) { |
---|
1291 | |
---|
1292 | /* |
---|
1293 | * Set up SCC hardware |
---|
1294 | */ |
---|
1295 | m860_fec_initialize_hardware (sc); |
---|
1296 | |
---|
1297 | /* |
---|
1298 | * Start driver tasks |
---|
1299 | */ |
---|
1300 | sc->txDaemonTid = rtems_bsdnet_newproc ("SCtx", 4096, fec_txDaemon, sc); |
---|
1301 | sc->rxDaemonTid = rtems_bsdnet_newproc ("SCrx", 4096, fec_rxDaemon, sc); |
---|
1302 | |
---|
1303 | } |
---|
1304 | |
---|
1305 | /* |
---|
1306 | * Set flags appropriately |
---|
1307 | */ |
---|
1308 | if (ifp->if_flags & IFF_PROMISC) |
---|
1309 | m8xx.fec.r_cntrl |= 0x8; |
---|
1310 | else |
---|
1311 | m8xx.fec.r_cntrl &= ~0x8; |
---|
1312 | |
---|
1313 | |
---|
1314 | /* |
---|
1315 | * Tell the world that we're running. |
---|
1316 | */ |
---|
1317 | ifp->if_flags |= IFF_RUNNING; |
---|
1318 | |
---|
1319 | /* |
---|
1320 | * Enable receiver and transmitter |
---|
1321 | */ |
---|
1322 | m8xx.fec.ecntrl = 0x2; |
---|
1323 | } |
---|
1324 | |
---|
1325 | |
---|
1326 | /* |
---|
1327 | * Stop the device |
---|
1328 | */ |
---|
1329 | static void |
---|
1330 | scc_stop (struct m860_enet_struct *sc) |
---|
1331 | { |
---|
1332 | struct ifnet *ifp = &sc->arpcom.ac_if; |
---|
1333 | |
---|
1334 | ifp->if_flags &= ~IFF_RUNNING; |
---|
1335 | |
---|
1336 | /* |
---|
1337 | * Shut down receiver and transmitter |
---|
1338 | */ |
---|
1339 | m8xx.scc1.gsmr_l &= ~0x30; |
---|
1340 | } |
---|
1341 | |
---|
1342 | static void |
---|
1343 | fec_stop (struct m860_enet_struct *sc) |
---|
1344 | { |
---|
1345 | struct ifnet *ifp = &sc->arpcom.ac_if; |
---|
1346 | |
---|
1347 | ifp->if_flags &= ~IFF_RUNNING; |
---|
1348 | |
---|
1349 | /* |
---|
1350 | * Shut down receiver and transmitter |
---|
1351 | */ |
---|
1352 | m8xx.fec.ecntrl = 0x0; |
---|
1353 | } |
---|
1354 | |
---|
1355 | /* |
---|
1356 | * Show interface statistics |
---|
1357 | */ |
---|
1358 | static void |
---|
1359 | enet_stats (struct m860_enet_struct *sc) |
---|
1360 | { |
---|
1361 | printf (" Rx Interrupts:%-8lu", sc->rxInterrupts); |
---|
1362 | printf (" Not First:%-8lu", sc->rxNotFirst); |
---|
1363 | printf (" Not Last:%-8lu\n", sc->rxNotLast); |
---|
1364 | printf (" Giant:%-8lu", sc->rxGiant); |
---|
1365 | printf (" Runt:%-8lu", sc->rxRunt); |
---|
1366 | printf (" Non-octet:%-8lu\n", sc->rxNonOctet); |
---|
1367 | printf (" Bad CRC:%-8lu", sc->rxBadCRC); |
---|
1368 | printf (" Overrun:%-8lu", sc->rxOverrun); |
---|
1369 | printf (" Collision:%-8lu\n", sc->rxCollision); |
---|
1370 | printf (" Discarded:%-8lu\n", (unsigned long)m8xx.scc1p.un.ethernet.disfc); |
---|
1371 | |
---|
1372 | printf (" Tx Interrupts:%-8lu", sc->txInterrupts); |
---|
1373 | printf (" Deferred:%-8lu", sc->txDeferred); |
---|
1374 | printf (" Missed Hearbeat:%-8lu\n", sc->txHeartbeat); |
---|
1375 | printf (" No Carrier:%-8lu", sc->txLostCarrier); |
---|
1376 | printf ("Retransmit Limit:%-8lu", sc->txRetryLimit); |
---|
1377 | printf (" Late Collision:%-8lu\n", sc->txLateCollision); |
---|
1378 | printf (" Underrun:%-8lu", sc->txUnderrun); |
---|
1379 | printf (" Raw output wait:%-8lu\n", sc->txRawWait); |
---|
1380 | } |
---|
1381 | |
---|
1382 | /* |
---|
1383 | * Driver ioctl handler |
---|
1384 | */ |
---|
1385 | static int |
---|
1386 | scc_ioctl (struct ifnet *ifp, int command, caddr_t data) |
---|
1387 | { |
---|
1388 | struct m860_enet_struct *sc = ifp->if_softc; |
---|
1389 | int error = 0; |
---|
1390 | |
---|
1391 | switch (command) { |
---|
1392 | case SIOCGIFADDR: |
---|
1393 | case SIOCSIFADDR: |
---|
1394 | ether_ioctl (ifp, command, data); |
---|
1395 | break; |
---|
1396 | |
---|
1397 | case SIOCSIFFLAGS: |
---|
1398 | switch (ifp->if_flags & (IFF_UP | IFF_RUNNING)) { |
---|
1399 | case IFF_RUNNING: |
---|
1400 | scc_stop (sc); |
---|
1401 | break; |
---|
1402 | |
---|
1403 | case IFF_UP: |
---|
1404 | scc_init (sc); |
---|
1405 | break; |
---|
1406 | |
---|
1407 | case IFF_UP | IFF_RUNNING: |
---|
1408 | scc_stop (sc); |
---|
1409 | scc_init (sc); |
---|
1410 | break; |
---|
1411 | |
---|
1412 | default: |
---|
1413 | break; |
---|
1414 | } |
---|
1415 | break; |
---|
1416 | |
---|
1417 | case SIO_RTEMS_SHOW_STATS: |
---|
1418 | enet_stats (sc); |
---|
1419 | break; |
---|
1420 | |
---|
1421 | /* |
---|
1422 | * FIXME: All sorts of multicast commands need to be added here! |
---|
1423 | */ |
---|
1424 | default: |
---|
1425 | error = EINVAL; |
---|
1426 | break; |
---|
1427 | } |
---|
1428 | return error; |
---|
1429 | } |
---|
1430 | |
---|
1431 | static int |
---|
1432 | fec_ioctl (struct ifnet *ifp, int command, caddr_t data) |
---|
1433 | { |
---|
1434 | struct m860_enet_struct *sc = ifp->if_softc; |
---|
1435 | int error = 0; |
---|
1436 | |
---|
1437 | switch (command) { |
---|
1438 | case SIOCGIFADDR: |
---|
1439 | case SIOCSIFADDR: |
---|
1440 | ether_ioctl (ifp, command, data); |
---|
1441 | break; |
---|
1442 | |
---|
1443 | case SIOCSIFFLAGS: |
---|
1444 | switch (ifp->if_flags & (IFF_UP | IFF_RUNNING)) { |
---|
1445 | case IFF_RUNNING: |
---|
1446 | fec_stop (sc); |
---|
1447 | break; |
---|
1448 | |
---|
1449 | case IFF_UP: |
---|
1450 | fec_init (sc); |
---|
1451 | break; |
---|
1452 | |
---|
1453 | case IFF_UP | IFF_RUNNING: |
---|
1454 | fec_stop (sc); |
---|
1455 | fec_init (sc); |
---|
1456 | break; |
---|
1457 | |
---|
1458 | default: |
---|
1459 | break; |
---|
1460 | } |
---|
1461 | break; |
---|
1462 | |
---|
1463 | case SIO_RTEMS_SHOW_STATS: |
---|
1464 | enet_stats (sc); |
---|
1465 | break; |
---|
1466 | |
---|
1467 | /* |
---|
1468 | * FIXME: All sorts of multicast commands need to be added here! |
---|
1469 | */ |
---|
1470 | default: |
---|
1471 | error = EINVAL; |
---|
1472 | break; |
---|
1473 | } |
---|
1474 | return error; |
---|
1475 | } |
---|
1476 | |
---|
1477 | /* |
---|
1478 | * Attach an SCC driver to the system |
---|
1479 | */ |
---|
1480 | int |
---|
1481 | rtems_scc1_driver_attach (struct rtems_bsdnet_ifconfig *config) |
---|
1482 | { |
---|
1483 | struct m860_enet_struct *sc; |
---|
1484 | struct ifnet *ifp; |
---|
1485 | int mtu; |
---|
1486 | int i; |
---|
1487 | |
---|
1488 | /* |
---|
1489 | * Find a free driver |
---|
1490 | */ |
---|
1491 | for (i = 0 ; i < NIFACES ; i++) { |
---|
1492 | sc = &enet_driver[i]; |
---|
1493 | ifp = &sc->arpcom.ac_if; |
---|
1494 | if (ifp->if_softc == NULL) |
---|
1495 | break; |
---|
1496 | } |
---|
1497 | if (i >= NIFACES) { |
---|
1498 | printf ("Too many SCC drivers.\n"); |
---|
1499 | return 0; |
---|
1500 | } |
---|
1501 | |
---|
1502 | /* |
---|
1503 | * Process options |
---|
1504 | */ |
---|
1505 | if (config->hardware_address) { |
---|
1506 | memcpy (sc->arpcom.ac_enaddr, config->hardware_address, ETHER_ADDR_LEN); |
---|
1507 | } |
---|
1508 | else { |
---|
1509 | sc->arpcom.ac_enaddr[0] = 0x44; |
---|
1510 | sc->arpcom.ac_enaddr[1] = 0x22; |
---|
1511 | sc->arpcom.ac_enaddr[2] = 0x33; |
---|
1512 | sc->arpcom.ac_enaddr[3] = 0x33; |
---|
1513 | sc->arpcom.ac_enaddr[4] = 0x22; |
---|
1514 | sc->arpcom.ac_enaddr[5] = 0x44; |
---|
1515 | } |
---|
1516 | if (config->mtu) |
---|
1517 | mtu = config->mtu; |
---|
1518 | else |
---|
1519 | mtu = ETHERMTU; |
---|
1520 | if (config->rbuf_count) |
---|
1521 | sc->rxBdCount = config->rbuf_count; |
---|
1522 | else |
---|
1523 | sc->rxBdCount = RX_BUF_COUNT; |
---|
1524 | if (config->xbuf_count) |
---|
1525 | sc->txBdCount = config->xbuf_count; |
---|
1526 | else |
---|
1527 | sc->txBdCount = TX_BUF_COUNT * TX_BD_PER_BUF; |
---|
1528 | sc->acceptBroadcast = !config->ignore_broadcast; |
---|
1529 | |
---|
1530 | /* |
---|
1531 | * Set up network interface values |
---|
1532 | */ |
---|
1533 | ifp->if_softc = sc; |
---|
1534 | ifp->if_unit = i + 1; |
---|
1535 | ifp->if_name = "eth"; |
---|
1536 | ifp->if_mtu = mtu; |
---|
1537 | ifp->if_init = scc_init; |
---|
1538 | ifp->if_ioctl = scc_ioctl; |
---|
1539 | ifp->if_start = m860_enet_start; |
---|
1540 | ifp->if_output = ether_output; |
---|
1541 | ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX; |
---|
1542 | if (ifp->if_snd.ifq_maxlen == 0) |
---|
1543 | ifp->if_snd.ifq_maxlen = ifqmaxlen; |
---|
1544 | |
---|
1545 | /* |
---|
1546 | * Attach the interface |
---|
1547 | */ |
---|
1548 | if_attach (ifp); |
---|
1549 | ether_ifattach (ifp); |
---|
1550 | return 1; |
---|
1551 | }; |
---|
1552 | |
---|
1553 | int |
---|
1554 | rtems_fec_driver_attach (struct rtems_bsdnet_ifconfig *config) |
---|
1555 | { |
---|
1556 | struct m860_enet_struct *sc; |
---|
1557 | struct ifnet *ifp; |
---|
1558 | int mtu; |
---|
1559 | |
---|
1560 | /* |
---|
1561 | * Find a free driver |
---|
1562 | */ |
---|
1563 | sc = &enet_driver[0]; |
---|
1564 | ifp = &sc->arpcom.ac_if; |
---|
1565 | if (ifp->if_softc != NULL) |
---|
1566 | return 0; |
---|
1567 | |
---|
1568 | |
---|
1569 | /* |
---|
1570 | * Process options |
---|
1571 | */ |
---|
1572 | if (config->hardware_address) { |
---|
1573 | memcpy (sc->arpcom.ac_enaddr, config->hardware_address, ETHER_ADDR_LEN); |
---|
1574 | } |
---|
1575 | else { |
---|
1576 | sc->arpcom.ac_enaddr[0] = 0x44; |
---|
1577 | sc->arpcom.ac_enaddr[1] = 0x22; |
---|
1578 | sc->arpcom.ac_enaddr[2] = 0x33; |
---|
1579 | sc->arpcom.ac_enaddr[3] = 0x33; |
---|
1580 | sc->arpcom.ac_enaddr[4] = 0x22; |
---|
1581 | sc->arpcom.ac_enaddr[5] = 0x44; |
---|
1582 | } |
---|
1583 | if (config->mtu) |
---|
1584 | mtu = config->mtu; |
---|
1585 | else |
---|
1586 | mtu = ETHERMTU; |
---|
1587 | if (config->rbuf_count) |
---|
1588 | sc->rxBdCount = config->rbuf_count; |
---|
1589 | else |
---|
1590 | sc->rxBdCount = RX_BUF_COUNT; |
---|
1591 | if (config->xbuf_count) |
---|
1592 | sc->txBdCount = config->xbuf_count; |
---|
1593 | else |
---|
1594 | sc->txBdCount = TX_BUF_COUNT * TX_BD_PER_BUF; |
---|
1595 | sc->acceptBroadcast = !config->ignore_broadcast; |
---|
1596 | |
---|
1597 | /* |
---|
1598 | * Set up network interface values |
---|
1599 | */ |
---|
1600 | ifp->if_softc = sc; |
---|
1601 | ifp->if_unit = 1; |
---|
1602 | ifp->if_name = "eth"; |
---|
1603 | ifp->if_mtu = mtu; |
---|
1604 | ifp->if_init = fec_init; |
---|
1605 | ifp->if_ioctl = fec_ioctl; |
---|
1606 | ifp->if_start = m860_enet_start; |
---|
1607 | ifp->if_output = ether_output; |
---|
1608 | ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX; |
---|
1609 | if (ifp->if_snd.ifq_maxlen == 0) |
---|
1610 | ifp->if_snd.ifq_maxlen = ifqmaxlen; |
---|
1611 | |
---|
1612 | /* |
---|
1613 | * Attach the interface |
---|
1614 | */ |
---|
1615 | if_attach (ifp); |
---|
1616 | ether_ifattach (ifp); |
---|
1617 | return 1; |
---|
1618 | }; |
---|
1619 | |
---|
1620 | int |
---|
1621 | rtems_enet_driver_attach (struct rtems_bsdnet_ifconfig *config) |
---|
1622 | { |
---|
1623 | int i; |
---|
1624 | |
---|
1625 | if ((m8xx.fec.mii_data & 0xffff) == 0x2000) { |
---|
1626 | /* rtems_scc1_driver_attach(config);*/ |
---|
1627 | return rtems_fec_driver_attach(config); |
---|
1628 | } |
---|
1629 | else { |
---|
1630 | return rtems_scc1_driver_attach(config); |
---|
1631 | } |
---|
1632 | } |
---|