1 | /////////////////////////////////////////////////////////////////////////////////// |
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2 | // File : nic_driver.c |
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3 | // Date : 23/05/2013 |
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4 | // Author : alain greiner |
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5 | // Copyright (c) UPMC-LIP6 |
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6 | /////////////////////////////////////////////////////////////////////////////////// |
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7 | |
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8 | #include <giet_config.h> |
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9 | #include <nic_driver.h> |
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10 | #include <cma_driver.h> |
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11 | #include <utils.h> |
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12 | #include <ctx_handler.h> |
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13 | #include <vmem.h> |
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14 | |
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15 | #if !defined(GIET_USE_IOMMU) |
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16 | # error: You must define GIET_USE_IOMMU in the giet_config.h file |
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17 | #endif |
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18 | |
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19 | #if !defined(SEG_NIC_BASE) |
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20 | # error: You must define SEG_NIC_BASE in the hard_config.h file |
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21 | #endif |
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22 | |
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23 | #if !defined(NB_NIC_CHANNELS) |
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24 | # error: You must define NB_NIC_CHANNELS in the hard_config.h file |
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25 | #endif |
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26 | |
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27 | #if !defined(X_IO) |
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28 | # error: You must define X_IO in the hard_config.h file |
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29 | #endif |
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30 | |
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31 | #if !defined(Y_IO) |
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32 | # error: You must define Y_IO in the hard_config.h file |
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33 | #endif |
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34 | |
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35 | #if ( NB_NIC_CHANNELS > 8 ) |
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36 | # error: NB_NIC_CHANNELS cannot be larger than 8 |
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37 | #endif |
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38 | |
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39 | #if !defined(NB_CMA_CHANNELS) |
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40 | # error: You must define NB_CMA_CHANNELS in the hard_config.h file |
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41 | #endif |
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42 | |
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43 | #if ( NB_CMA_CHANNELS > 8 ) |
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44 | # error: NB_CMA_CHANNELS cannot be larger than 8 |
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45 | #endif |
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46 | |
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47 | #if !defined( USE_IOB ) |
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48 | # error: You must define USE_IOB in the hard_config.h file |
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49 | #endif |
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50 | |
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51 | #if !defined( GIET_CHBUF_NBUFS ) |
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52 | # error: You must define GIET_CHBUF_NBUFS in the giet_config.h file |
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53 | #endif |
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54 | |
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55 | #define in_unckdata __attribute__((section (".unckdata"))) |
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56 | |
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57 | /////////////////////////////////////////////////////////////////////////////// |
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58 | // This low_level function returns the value contained in a channel register. |
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59 | /////////////////////////////////////////////////////////////////////////////// |
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60 | unsigned int _nic_get_channel_register( unsigned int channel, |
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61 | unsigned int index ) |
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62 | { |
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63 | unsigned int* vaddr = (unsigned int*)SEG_NIC_BASE + |
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64 | NIC_CHANNEL_SPAN * channel + index; |
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65 | return _io_extended_read( vaddr ); |
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66 | } |
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67 | |
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68 | /////////////////////////////////////////////////////////////////////////////// |
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69 | // This low-level function set a new value in a channel register. |
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70 | /////////////////////////////////////////////////////////////////////////////// |
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71 | void _nic_set_channel_register( unsigned int channel, |
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72 | unsigned int index, |
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73 | unsigned int value ) |
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74 | { |
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75 | unsigned int* vaddr = (unsigned int*)SEG_NIC_BASE + |
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76 | NIC_CHANNEL_SPAN * channel + index; |
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77 | _io_extended_write( vaddr, value ); |
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78 | } |
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79 | |
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80 | /////////////////////////////////////////////////////////////////////////////// |
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81 | // This low_level function returns the value contained in a global register. |
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82 | /////////////////////////////////////////////////////////////////////////////// |
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83 | unsigned int _nic_get_global_register( unsigned int index ) |
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84 | { |
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85 | unsigned int* vaddr = (unsigned int*)SEG_NIC_BASE + |
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86 | NIC_CHANNEL_SPAN * NB_NIC_CHANNELS + index; |
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87 | return _io_extended_read( vaddr ); |
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88 | } |
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89 | |
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90 | /////////////////////////////////////////////////////////////////////////////// |
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91 | // This low-level function set a new value in a global register. |
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92 | /////////////////////////////////////////////////////////////////////////////// |
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93 | void _nic_set_global_register( unsigned int index, |
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94 | unsigned int value ) |
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95 | { |
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96 | unsigned int* vaddr = (unsigned int*)SEG_NIC_BASE + |
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97 | NIC_CHANNEL_SPAN * NB_NIC_CHANNELS + index; |
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98 | _io_extended_write( vaddr, value ); |
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99 | } |
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100 | |
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101 | //////////////////////////////////////////// |
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102 | int _nic_global_init( unsigned int channels, |
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103 | unsigned int vis, |
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104 | unsigned int bc_enable, |
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105 | unsigned int bypass_enable ) |
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106 | { |
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107 | _nic_set_global_register( NIC_G_VIS , vis ); |
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108 | _nic_set_global_register( NIC_G_NB_CHAN , channels ); |
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109 | _nic_set_global_register( NIC_G_BC_ENABLE , bc_enable ); |
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110 | _nic_set_global_register( NIC_G_BYPASS_ENABLE, bypass_enable ); |
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111 | _nic_set_global_register( NIC_G_ON , 1 ); |
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112 | |
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113 | return 0; |
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114 | } |
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115 | |
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116 | //////////////////////////////////////////// |
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117 | int _nic_channel_init( unsigned int index, |
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118 | unsigned int mac4, |
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119 | unsigned int mac2 ) |
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120 | { |
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121 | unsigned int base = SEG_NIC_BASE; |
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122 | unsigned int extend = (X_IO << Y_WIDTH) + Y_IO; |
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123 | |
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124 | _nic_set_channel_register( index, NIC_RX_DESC_LO_0 + 4096, base ); |
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125 | _nic_set_channel_register( index, NIC_RX_DESC_LO_1 + 4096, base + 0x1000 ); |
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126 | _nic_set_channel_register( index, NIC_TX_DESC_LO_0 + 4096, base + 0x2000 ); |
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127 | _nic_set_channel_register( index, NIC_TX_DESC_LO_1 + 4096, base + 0x3000 ); |
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128 | |
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129 | _nic_set_channel_register( index, NIC_RX_DESC_HI_0 , extend ); |
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130 | _nic_set_channel_register( index, NIC_RX_DESC_HI_1 , extend ); |
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131 | _nic_set_channel_register( index, NIC_TX_DESC_HI_0 , extend ); |
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132 | _nic_set_channel_register( index, NIC_TX_DESC_HI_1 , extend ); |
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133 | |
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134 | _nic_set_channel_register( index, NIC_MAC_4 , mac4 ); |
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135 | _nic_set_channel_register( index, NIC_MAC_2 , mac2 ); |
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136 | |
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137 | _nic_set_channel_register( index, NIC_RX_RUN , 1 ); |
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138 | _nic_set_channel_register( index, NIC_TX_RUN , 1 ); |
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139 | |
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140 | return 0; |
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141 | } |
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142 | |
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143 | ///////////////////////////////////////////////////////////////////////////////////// |
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144 | // Synchronous access functions |
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145 | ///////////////////////////////////////////////////////////////////////////////////// |
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146 | |
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147 | /////////////////////////////////////////////// |
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148 | int _nic_sync_send( unsigned int channel, |
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149 | unsigned long long user_paddr ) |
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150 | { |
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151 | unsigned long long nic_paddr; // nic buffer physical address |
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152 | unsigned int done = 0; |
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153 | unsigned int lsb; |
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154 | unsigned int msb; |
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155 | |
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156 | if ( channel >= NB_NIC_CHANNELS ) |
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157 | { |
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158 | _puts("[GIET ERROR] in _timer_sync_send()\n"); |
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159 | return -1; |
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160 | } |
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161 | |
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162 | // poll the NIC buffers |
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163 | while ( done == 0 ) |
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164 | { |
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165 | // test availability of NIC TX buffer 0 |
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166 | lsb = _nic_get_channel_register( channel, NIC_TX_DESC_LO_0 ); |
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167 | msb = _nic_get_channel_register( channel, NIC_TX_DESC_HI_0 ); |
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168 | if ( (msb & 0x80000000) == 0 ) |
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169 | { |
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170 | msb = msb & 0x0000FFFF; |
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171 | done = 1; |
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172 | continue; |
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173 | } |
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174 | |
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175 | // test availability of NIC TX buffer 1 |
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176 | lsb = _nic_get_channel_register( channel, NIC_TX_DESC_LO_1 ); |
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177 | msb = _nic_get_channel_register( channel, NIC_TX_DESC_HI_1 ); |
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178 | if ( (msb & 0x80000000) == 0 ) |
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179 | { |
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180 | msb = msb & 0x0000FFFF; |
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181 | done = 1; |
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182 | continue; |
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183 | } |
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184 | |
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185 | // random delay (average value: 380 cycle) |
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186 | _random_wait( 8 ); |
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187 | } |
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188 | |
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189 | // make the transfer |
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190 | nic_paddr = (unsigned long long)lsb + (((unsigned long long)msb) << 32); |
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191 | |
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192 | _physical_memcpy( nic_paddr , user_paddr, 4096 ); |
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193 | |
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194 | return 0; |
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195 | } |
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196 | |
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197 | /////////////////////////////////////////////////// |
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198 | int _nic_sync_receive( unsigned int channel, |
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199 | unsigned long long user_paddr ) |
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200 | { |
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201 | unsigned long long nic_paddr; // nic buffer physical address |
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202 | unsigned int done = 0; |
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203 | unsigned int lsb; |
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204 | unsigned int msb; |
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205 | |
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206 | if ( channel >= NB_NIC_CHANNELS ) |
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207 | { |
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208 | _puts("[GIET ERROR] in _timer_sync_receive()\n"); |
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209 | return -1; |
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210 | } |
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211 | |
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212 | // polling the NIC buffers |
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213 | while ( done == 0 ) |
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214 | { |
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215 | // test availability of NIC RX buffer 0 |
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216 | lsb = _nic_get_channel_register( channel, NIC_RX_DESC_LO_0 ); |
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217 | msb = _nic_get_channel_register( channel, NIC_RX_DESC_HI_0 ); |
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218 | if ( (msb & 0x80000000) == 1 ) |
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219 | { |
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220 | msb = msb & 0x0000FFFF; |
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221 | done = 1; |
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222 | continue; |
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223 | } |
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224 | |
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225 | // test availability of NIC RX buffer 1 |
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226 | lsb = _nic_get_channel_register( channel, NIC_RX_DESC_LO_1 ); |
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227 | msb = _nic_get_channel_register( channel, NIC_RX_DESC_HI_1 ); |
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228 | if ( (msb & 0x80000000) == 1 ) |
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229 | { |
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230 | msb = msb & 0x0000FFFF; |
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231 | done = 1; |
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232 | continue; |
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233 | } |
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234 | |
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235 | // random delay (average value: 380 cycle) |
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236 | _random_wait( 8 ); |
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237 | } |
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238 | |
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239 | // make the transfer |
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240 | nic_paddr = (unsigned long long)lsb + (((unsigned long long)msb) << 32); |
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241 | |
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242 | _physical_memcpy( user_paddr, nic_paddr , 4096 ); |
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243 | |
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244 | return 0; |
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245 | } |
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246 | |
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247 | ///////////////////////////////////////////////////////////////////////////////////// |
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248 | // CMA access functions |
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249 | ///////////////////////////////////////////////////////////////////////////////////// |
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250 | |
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251 | ////////////////////////////////////////////////////////////// |
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252 | int _nic_cma_receive( unsigned int nic_channel, |
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253 | unsigned int cma_channel, |
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254 | nic_chbuf_t* kernel_chbuf ) |
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255 | |
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256 | { |
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257 | unsigned int nic_chbuf_lsb; // 32 LSB bits of the NIC chbuf physical address |
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258 | unsigned int nic_chbuf_msb; // 16 MSB bits of the NIC chbuf physical address |
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259 | unsigned int mem_chbuf_lsb; // 32 LSB bits of the kernel chbuf physical address |
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260 | unsigned int mem_chbuf_msb; // 16 MSB bits of the kernel chbuf physical address |
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261 | |
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262 | unsigned int ppn; |
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263 | unsigned int flags; |
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264 | |
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265 | // checking parameters |
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266 | if ( nic_channel >= NB_NIC_CHANNELS ) |
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267 | { |
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268 | _puts("[GIET ERROR] in _nic_cma_start_receive() : nic_channel index too large\n"); |
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269 | return -1; |
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270 | } |
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271 | if ( cma_channel >= NB_CMA_CHANNELS ) |
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272 | { |
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273 | _puts("[GIET ERROR] in _nic_cma_start_receive() : cma_channel index too large\n"); |
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274 | return -1; |
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275 | } |
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276 | |
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277 | // get the NIC_RX chbuf descriptor physical address |
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278 | nic_chbuf_lsb = SEG_NIC_BASE + (nic_channel * NIC_CHANNEL_SPAN) + 0x1000; |
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279 | nic_chbuf_msb = (X_IO << Y_WIDTH) + Y_IO; |
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280 | |
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281 | // compute the kernel chbuf physical address |
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282 | unsigned int ptab = _get_context_slot(CTX_PTAB_ID); |
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283 | unsigned int vaddr = (unsigned int)kernel_chbuf; |
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284 | unsigned int ko = _v2p_translate( (page_table_t*)ptab, |
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285 | vaddr, |
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286 | &ppn, |
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287 | &flags ); |
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288 | if ( ko ) |
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289 | { |
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290 | _puts("\n[GIET ERROR] in _nic_cma_start_receive() : kernel buffer unmapped\n"); |
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291 | return -1; |
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292 | } |
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293 | |
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294 | mem_chbuf_lsb = (ppn << 12) | (vaddr & 0x00000FFF); |
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295 | mem_chbuf_msb = ppn >> 20; |
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296 | |
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297 | // initializes CMA registers defining the source chbuf (NIC_RX) |
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298 | _cma_set_register( cma_channel, CHBUF_SRC_DESC , nic_chbuf_lsb ); |
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299 | _cma_set_register( cma_channel, CHBUF_DST_EXT , nic_chbuf_msb ); |
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300 | _cma_set_register( cma_channel, CHBUF_SRC_NBUFS, 2 ); |
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301 | |
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302 | // initializes CMA registers defining the destination chbuf (kernel memory) |
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303 | _cma_set_register( cma_channel, CHBUF_DST_DESC , mem_chbuf_lsb ); |
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304 | _cma_set_register( cma_channel, CHBUF_DST_EXT , mem_chbuf_msb ); |
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305 | _cma_set_register( cma_channel, CHBUF_DST_NBUFS, GIET_CHBUF_NBUFS ); |
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306 | |
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307 | // set buffer size, polling period, and start |
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308 | _cma_set_register( cma_channel, CHBUF_BUF_SIZE , 4096 ); |
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309 | _cma_set_register( cma_channel, CHBUF_PERIOD , 300 ); |
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310 | _cma_set_register( cma_channel, CHBUF_RUN , 1 ); |
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311 | |
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312 | return 0; |
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313 | } |
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314 | |
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315 | ////////////////////////////////////////////////////////// |
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316 | int _nic_cma_send( unsigned int nic_channel, |
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317 | unsigned int cma_channel, |
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318 | nic_chbuf_t* kernel_chbuf ) |
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319 | { |
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320 | unsigned int nic_chbuf_lsb; // 32 LSB bits of the NIC chbuf physical address |
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321 | unsigned int nic_chbuf_msb; // 16 MSB bits of the NIC chbuf physical address |
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322 | unsigned int mem_chbuf_lsb; // 32 LSB bits of the kernel chbuf physical address |
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323 | unsigned int mem_chbuf_msb; // 16 MSB bits of the kernel chbuf physical address |
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324 | |
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325 | unsigned int ppn; |
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326 | unsigned int flags; |
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327 | |
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328 | // checking parameters |
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329 | if ( nic_channel >= NB_NIC_CHANNELS ) |
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330 | { |
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331 | _puts("[GIET ERROR] in _nic_cma_start_send() : nic_channel index too large\n"); |
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332 | return -1; |
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333 | } |
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334 | if ( cma_channel >= NB_CMA_CHANNELS ) |
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335 | { |
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336 | _puts("[GIET ERROR] in _nic_cma_start_send() : cma_channel index too large\n"); |
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337 | return -1; |
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338 | } |
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339 | |
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340 | // get the NIC_TX chbuf descriptor physical address |
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341 | nic_chbuf_lsb = SEG_NIC_BASE + (nic_channel * NIC_CHANNEL_SPAN) + 0x1010; |
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342 | nic_chbuf_msb = (X_IO << Y_WIDTH) + Y_IO; |
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343 | |
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344 | // compute the kernel chbuf physical address |
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345 | unsigned int ptab = _get_context_slot(CTX_PTAB_ID); |
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346 | unsigned int vaddr = (unsigned int)kernel_chbuf; |
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347 | unsigned int ko = _v2p_translate( (page_table_t*)ptab, |
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348 | vaddr, |
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349 | &ppn, |
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350 | &flags ); |
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351 | if ( ko ) |
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352 | { |
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353 | _puts("\n[GIET ERROR] in _nic_cma_start_send() : kernel buffer unmapped\n"); |
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354 | return -1; |
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355 | } |
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356 | |
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357 | mem_chbuf_lsb = (ppn << 12) | (vaddr & 0x00000FFF); |
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358 | mem_chbuf_msb = ppn >> 20; |
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359 | |
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360 | // initializes CMA registers defining the source chbuf (kernel memory) |
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361 | _cma_set_register( cma_channel, CHBUF_SRC_DESC , mem_chbuf_lsb ); |
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362 | _cma_set_register( cma_channel, CHBUF_DST_EXT , mem_chbuf_msb ); |
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363 | _cma_set_register( cma_channel, CHBUF_SRC_NBUFS, GIET_CHBUF_NBUFS ); |
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364 | |
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365 | // initializes CMA registers defining the destination chbuf (NIC_TX) |
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366 | _cma_set_register( cma_channel, CHBUF_DST_DESC , nic_chbuf_lsb ); |
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367 | _cma_set_register( cma_channel, CHBUF_DST_EXT , nic_chbuf_msb ); |
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368 | _cma_set_register( cma_channel, CHBUF_DST_NBUFS, 2 ); |
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369 | |
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370 | // set buffer size, polling period, and start |
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371 | _cma_set_register( cma_channel, CHBUF_BUF_SIZE , 4096 ); |
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372 | _cma_set_register( cma_channel, CHBUF_PERIOD , 300 ); |
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373 | _cma_set_register( cma_channel, CHBUF_RUN , 1 ); |
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374 | |
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375 | return 0; |
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376 | } |
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377 | |
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378 | //////////////////////////////////////////////////////////////////////////////////////////// |
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379 | // Interrupt Service Routines |
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380 | //////////////////////////////////////////////////////////////////////////////////////////// |
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381 | |
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382 | //////////////////////////////////////// |
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383 | void _nic_rx_isr( unsigned int irq_type, |
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384 | unsigned int irq_id, |
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385 | unsigned int channel ) |
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386 | { |
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387 | _puts("[NIC WARNING] RX buffers are full for NIC channel "); |
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388 | _putd( channel ); |
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389 | _puts("\n"); |
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390 | } |
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391 | |
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392 | //////////////////////////////////////// |
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393 | void _nic_tx_isr( unsigned int irq_type, |
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394 | unsigned int irq_id, |
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395 | unsigned int channel ) |
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396 | { |
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397 | _puts("[NIC WARNING] TX buffers are full for NIC channel "); |
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398 | _putd( channel ); |
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399 | _puts("\n"); |
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400 | } |
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401 | |
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402 | // Local Variables: |
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403 | // tab-width: 4 |
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404 | // c-basic-offset: 4 |
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405 | // c-file-offsets:((innamespace . 0)(inline-open . 0)) |
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406 | // indent-tabs-mode: nil |
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407 | // End: |
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408 | // vim: filetype=c:expandtab:shiftwidth=4:tabstop=4:softtabstop=4 |
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409 | |
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