1 | /////////////////////////////////////////////////////////////////////////////////// |
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2 | // File : dma_driver.c |
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3 | // Date : 23/11/2013 |
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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 <hard_config.h> |
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10 | #include <dma_driver.h> |
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11 | #include <tty_driver.h> |
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12 | #include <vmem.h> |
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13 | #include <utils.h> |
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14 | #include <io.h> |
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15 | |
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16 | #if !defined(X_SIZE) |
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17 | # error: You must define X_SIZE in the hard_config.h file |
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18 | #endif |
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19 | |
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20 | #if !defined(Y_SIZE) |
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21 | # error: You must define X_SIZE in the hard_config.h file |
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22 | #endif |
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23 | |
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24 | #if !defined(X_WIDTH) |
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25 | # error: You must define X_WIDTH in the hard_config.h file |
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26 | #endif |
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27 | |
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28 | #if !defined(Y_WIDTH) |
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29 | # error: You must define X_WIDTH in the hard_config.h file |
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30 | #endif |
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31 | |
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32 | #if !defined(NB_DMA_CHANNELS) |
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33 | # error: You must define NB_DMA_CHANNELS in the hard_config.h file |
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34 | #endif |
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35 | |
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36 | #if !defined(SEG_DMA_BASE) |
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37 | # error: You must define SEG_DMA_BASE in the hard_config.h file |
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38 | #endif |
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39 | |
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40 | #if !defined(PERI_CLUSTER_INCREMENT) |
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41 | # error: You must define PERI_CLUSTER_INCREMENT in the hard_config.h file |
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42 | #endif |
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43 | |
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44 | extern volatile unsigned int _ptabs_vaddr[]; |
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45 | |
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46 | /////////////////////////////////////////////////////////////////////////////// |
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47 | // This low level function returns the value contained in register "index" |
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48 | // in the DMA component contained in cluster "cluster_xy" |
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49 | /////////////////////////////////////////////////////////////////////////////// |
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50 | static |
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51 | unsigned int _dma_get_register( unsigned int cluster_xy, // cluster index |
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52 | unsigned int channel_id, // channel index |
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53 | unsigned int index ) // register index |
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54 | { |
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55 | unsigned int vaddr = |
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56 | SEG_DMA_BASE + |
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57 | (cluster_xy * PERI_CLUSTER_INCREMENT) + |
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58 | (channel_id * DMA_SPAN) + |
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59 | (index << 2); |
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60 | |
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61 | return ioread32( (void*)vaddr ); |
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62 | } |
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63 | |
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64 | /////////////////////////////////////////////////////////////////////////////// |
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65 | // This low level function sets a new value in register "index" |
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66 | // in the DMA component contained in cluster "cluster_xy" |
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67 | /////////////////////////////////////////////////////////////////////////////// |
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68 | static |
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69 | void _dma_set_register( unsigned int cluster_xy, // cluster index |
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70 | unsigned int channel_id, // channel index |
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71 | unsigned int index, // register index |
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72 | unsigned int value ) // value to be written |
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73 | { |
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74 | unsigned int vaddr = |
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75 | SEG_DMA_BASE + |
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76 | (cluster_xy * PERI_CLUSTER_INCREMENT) + |
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77 | (channel_id * DMA_SPAN) + |
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78 | (index << 2); |
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79 | |
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80 | iowrite32( (void*)vaddr, value ); |
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81 | } |
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82 | |
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83 | //////////////////////////////////////////////// |
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84 | unsigned int _dma_init( unsigned int cluster_xy, |
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85 | unsigned int channel_id ) |
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86 | { |
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87 | #if NB_DMA_CHANNELS > 0 |
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88 | |
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89 | // parameters checking |
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90 | unsigned int x = cluster_xy >> Y_WIDTH; |
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91 | unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1); |
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92 | if (x >= X_SIZE) return 1; |
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93 | if (y >= Y_SIZE) return 1; |
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94 | if (channel_id >= NB_DMA_CHANNELS) return 1; |
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95 | |
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96 | // disable interrupt for selected channel |
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97 | _dma_set_register(cluster_xy, channel_id, DMA_IRQ_DISABLE, 1); |
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98 | return 0; |
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99 | #else |
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100 | return 1; |
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101 | #endif |
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102 | } |
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103 | |
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104 | ////////////////////////////////////////////////// |
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105 | unsigned int _dma_reset( unsigned int cluster_xy, |
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106 | unsigned int channel_id ) |
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107 | { |
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108 | #if NB_DMA_CHANNELS > 0 |
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109 | |
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110 | // parameters checking |
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111 | unsigned int x = cluster_xy >> Y_WIDTH; |
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112 | unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1); |
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113 | if (x >= X_SIZE) return 1; |
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114 | if (y >= Y_SIZE) return 1; |
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115 | if (channel_id >= NB_DMA_CHANNELS) return 1; |
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116 | |
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117 | // reset selected channel |
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118 | _dma_set_register(cluster_xy, channel_id, DMA_RESET, 0); |
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119 | return 0; |
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120 | #else |
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121 | return 1; |
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122 | #endif |
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123 | } |
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124 | |
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125 | ////////////////////////////////////////////////////// |
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126 | unsigned int _dma_get_status( unsigned int cluster_xy, |
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127 | unsigned int channel_id ) |
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128 | { |
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129 | #if NB_DMA_CHANNELS > 0 |
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130 | |
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131 | // parameters checking |
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132 | unsigned int x = cluster_xy >> Y_WIDTH; |
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133 | unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1); |
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134 | if (x >= X_SIZE) return 1; |
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135 | if (y >= Y_SIZE) return 1; |
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136 | if (channel_id >= NB_DMA_CHANNELS) return 1; |
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137 | |
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138 | // get selected channel status |
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139 | return _dma_get_register(cluster_xy, channel_id, DMA_LEN); |
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140 | #else |
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141 | return DMA_IDLE; |
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142 | #endif |
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143 | } |
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144 | |
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145 | //////////////////////////////////////////////////////// |
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146 | void _dma_start_transfer( unsigned int cluster_xy, // DMA cluster |
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147 | unsigned int channel_id, // DMA channel |
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148 | unsigned long long dst_paddr, // physical address |
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149 | unsigned long long src_paddr, // physical address |
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150 | unsigned int size ) // bytes |
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151 | { |
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152 | #if NB_DMA_CHANNELS > 0 |
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153 | |
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154 | // selected channel configuration and lauching |
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155 | _dma_set_register(cluster_xy, channel_id, DMA_SRC, |
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156 | (unsigned int)(src_paddr)); |
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157 | _dma_set_register(cluster_xy, channel_id, DMA_SRC_EXT, |
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158 | (unsigned int)(src_paddr>>32)); |
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159 | _dma_set_register(cluster_xy, channel_id, DMA_DST, |
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160 | (unsigned int)(dst_paddr)); |
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161 | _dma_set_register(cluster_xy, channel_id, DMA_DST_EXT, |
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162 | (unsigned int)(dst_paddr>>32)); |
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163 | _dma_set_register(cluster_xy, channel_id, DMA_LEN, |
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164 | (unsigned int)size); |
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165 | |
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166 | #endif |
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167 | } |
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168 | |
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169 | /////////////////////////////////////////////////////// |
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170 | void _dma_physical_copy( unsigned int cluster_xy, // DMA cluster |
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171 | unsigned int channel_id, // DMA channel |
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172 | unsigned long long dst_paddr, // destination physical address |
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173 | unsigned long long src_paddr, // source physical address |
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174 | unsigned int size ) // bytes |
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175 | { |
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176 | #if NB_DMA_CHANNELS > 0 |
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177 | |
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178 | // check DMA channel parameters |
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179 | unsigned int x = cluster_xy >> Y_WIDTH; |
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180 | unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1); |
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181 | if ( (x >= X_SIZE) || (y >= Y_SIZE) || (channel_id >= NB_DMA_CHANNELS) ) |
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182 | { |
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183 | _puts("\n[DMA ERROR] in _dma_physical_copy() : illegal DMA channel "); |
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184 | _exit(); |
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185 | } |
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186 | |
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187 | // check buffers alignment constraints |
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188 | if ( (dst_paddr & 0x3) || (src_paddr & 0x3) || (size & 0x3) ) |
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189 | { |
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190 | _puts("\n[DMA ERROR] in _dma_physical_copy() : buffer unaligned\n"); |
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191 | _exit(); |
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192 | } |
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193 | |
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194 | #if GIET_DEBUG_DMA_DRIVER |
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195 | _puts("\n[DMA DEBUG] enter _dma_physical_copy() for channel["); |
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196 | _putd( x ); |
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197 | _puts(","); |
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198 | _putd( y ); |
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199 | _puts(","); |
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200 | _putd( channel_id ); |
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201 | _puts("] at cycle "); |
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202 | _putd( _get_proctime() ); |
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203 | _puts("\n - src_paddr = "); |
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204 | _putl( src_paddr ); |
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205 | _puts("\n - dst_paddr = "); |
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206 | _putl( dst_paddr ); |
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207 | _puts("\n - bytes = "); |
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208 | _putd( size ); |
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209 | _puts("\n"); |
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210 | #endif |
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211 | |
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212 | // dma channel configuration & lauching |
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213 | _dma_start_transfer( cluster_xy, channel_id, dst_paddr, src_paddr, size ); |
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214 | |
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215 | // scan dma channel status |
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216 | unsigned int status = _dma_get_status( cluster_xy, channel_id ); |
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217 | while( (status != DMA_SUCCESS) && |
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218 | (status != DMA_READ_ERROR) && |
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219 | (status != DMA_WRITE_ERROR) ) |
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220 | { |
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221 | status = _dma_get_status( cluster_xy, channel_id ); |
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222 | |
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223 | #if GIET_DEBUG_DMA_DRIVER |
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224 | _puts("\n[DMA DEBUG] _dma_physical_copy() : ... waiting on DMA_STATUS register\n"); |
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225 | #endif |
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226 | |
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227 | } |
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228 | |
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229 | // analyse status |
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230 | if( status != DMA_SUCCESS ) |
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231 | { |
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232 | _puts("\n[DMA ERROR] in _dma_physical_copy() : bad DMA_STATUS"); |
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233 | _exit(); |
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234 | } |
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235 | |
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236 | // reset dma channel |
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237 | _dma_reset( cluster_xy, channel_id ); |
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238 | |
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239 | #if GIET_DEBUG_DMA_DRIVER |
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240 | _puts("\n[DMA DEBUG] exit _dma_physical_copy() at cycle "); |
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241 | _putd( _get_proctime() ); |
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242 | _puts("\n"); |
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243 | #endif |
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244 | |
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245 | #else // NB_DMA_CHANNELS == 0 |
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246 | |
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247 | _puts("\n[DMA ERROR] in _dma_physical_copy() : NB_DMA_CHANNELS == 0\n"); |
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248 | _exit(); |
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249 | |
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250 | #endif |
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251 | } |
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252 | |
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253 | |
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254 | //////////////////////////////////////// |
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255 | void _dma_copy( unsigned int cluster_xy, // DMA cluster |
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256 | unsigned int channel_id, // DMA channel |
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257 | unsigned int vspace_id, // vspace index for v2p translation |
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258 | unsigned int dst_vaddr, // dst_vaddr buffer vbase |
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259 | unsigned int src_vaddr, // src_vaddr buffer vbase |
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260 | unsigned int size ) // bytes |
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261 | { |
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262 | #if NB_DMA_CHANNELS > 0 |
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263 | |
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264 | // check DMA channel parameters |
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265 | unsigned int x = cluster_xy >> Y_WIDTH; |
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266 | unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1); |
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267 | if ( (x >= X_SIZE) || (y >= Y_SIZE) || (channel_id >= NB_DMA_CHANNELS) ) |
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268 | { |
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269 | _puts("\n[DMA ERROR] in _dma_copy() : illegal DMA channel "); |
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270 | _exit(); |
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271 | } |
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272 | |
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273 | // check buffers alignment constraints |
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274 | if ( (dst_vaddr & 0x3) || (src_vaddr & 0x3) || (size & 0x3) ) |
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275 | { |
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276 | _puts("\n[DMA ERROR] in _dma_copy() : buffer unaligned\n"); |
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277 | _exit(); |
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278 | } |
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279 | |
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280 | unsigned int ko; |
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281 | unsigned int ppn; |
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282 | unsigned int flags; |
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283 | |
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284 | #if GIET_DEBUG_DMA_DRIVER |
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285 | _puts("\n[DMA DEBUG] enter _dma_copy() for channel["); |
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286 | _putd( x ); |
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287 | _puts(","); |
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288 | _putd( y ); |
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289 | _puts(","); |
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290 | _putd( channel_id ); |
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291 | _puts("] at cycle "); |
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292 | _putd( _get_proctime() ); |
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293 | _puts("\n - src_vaddr = "); |
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294 | _putx( src_vaddr ); |
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295 | _puts("\n - dst_vaddr = "); |
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296 | _putx( dst_vaddr ); |
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297 | _puts("\n - bytes = "); |
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298 | _putd( size ); |
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299 | _puts("\n"); |
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300 | #endif |
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301 | |
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302 | // checking alignment constraints |
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303 | if ( (((unsigned int)dst_vaddr) & 0x3) || |
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304 | (((unsigned int)src_vaddr) & 0x3) || |
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305 | (size & 0x3) ) |
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306 | { |
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307 | _puts("\n[DMA ERROR] in _dma_copy() : buffer unaligned\n"); |
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308 | _exit(); |
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309 | } |
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310 | |
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311 | // get vspace page table pointer |
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312 | unsigned int pt = _ptabs_vaddr[vspace_id]; |
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313 | |
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314 | // get src_paddr buffer physical addresse |
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315 | ko = _v2p_translate( (page_table_t*)pt, // page table pointer |
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316 | src_vaddr>>12, // vpn |
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317 | &ppn, // ppn |
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318 | &flags ); // flags |
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319 | if ( ko ) |
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320 | { |
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321 | _puts("\n[DMA ERROR] in _dma_copy() : source buffer unmapped\n"); |
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322 | _exit(); |
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323 | } |
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324 | unsigned long long src_paddr = (((unsigned long long)ppn) << 12) | |
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325 | (unsigned long long)(src_vaddr & 0x00000FFF); |
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326 | |
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327 | // get dst_paddr buffer physical addresse |
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328 | ko = _v2p_translate( (page_table_t*)pt, // page table pointer |
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329 | dst_vaddr>>12, // vpn |
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330 | &ppn, // ppn |
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331 | &flags ); // flags |
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332 | if ( ko ) |
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333 | { |
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334 | _puts("\n[DMA ERROR] in _dma_copy() : dest buffer unmapped\n"); |
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335 | _exit(); |
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336 | } |
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337 | unsigned long long dst_paddr = (((unsigned long long)ppn) << 12) | |
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338 | (unsigned long long)(dst_vaddr & 0x00000FFF); |
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339 | |
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340 | #if GIET_DEBUG_DMA_DRIVER |
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341 | _puts("\n - src_paddr = "); |
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342 | _putl( src_paddr ); |
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343 | _puts("\n - dst_paddr = "); |
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344 | _putl( dst_paddr ); |
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345 | _puts("\n"); |
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346 | #endif |
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347 | |
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348 | // dma channel configuration & lauching |
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349 | _dma_start_transfer( cluster_xy, channel_id, dst_paddr, src_paddr, size ); |
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350 | |
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351 | // scan dma channel status |
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352 | unsigned int status = _dma_get_status( cluster_xy, channel_id ); |
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353 | while( (status != DMA_SUCCESS) && |
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354 | (status != DMA_READ_ERROR) && |
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355 | (status != DMA_WRITE_ERROR) ) |
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356 | { |
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357 | status = _dma_get_status( cluster_xy, channel_id ); |
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358 | |
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359 | #if GIET_DEBUG_DMA_DRIVER |
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360 | _puts("\n[DMA DEBUG] _dma_copy() : ... waiting on DMA_STATUS register\n"); |
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361 | #endif |
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362 | |
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363 | } |
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364 | |
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365 | // analyse status |
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366 | if( status != DMA_SUCCESS ) |
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367 | { |
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368 | _puts("\n[DMA ERROR] in _dma_copy() : bad DMA_STATUS\n"); |
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369 | _exit(); |
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370 | } |
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371 | // reset dma channel |
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372 | _dma_reset( cluster_xy, channel_id ); |
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373 | |
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374 | #if GIET_DEBUG_DMA_DRIVER |
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375 | _puts("\n[DMA DEBUG] exit _dma_copy() at cycle "); |
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376 | _putd( _get_proctime() ); |
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377 | _puts("\n"); |
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378 | #endif |
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379 | |
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380 | #else // NB_DMA_CHANNELS == 0 |
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381 | |
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382 | _puts("\n[DMA ERROR] in _dma_copy() : NB_DMA_CHANNELS == 0\n"); |
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383 | _exit(); |
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384 | |
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385 | #endif |
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386 | } // end _dma_copy |
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387 | |
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388 | ///////////////////////////////////// |
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389 | void _dma_isr( unsigned int irq_type, |
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390 | unsigned int irq_id, |
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391 | unsigned int channel ) |
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392 | { |
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393 | _puts("\n[DMA ERROR] _dma_isr() not implemented\n"); |
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394 | _exit(); |
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395 | } |
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396 | |
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397 | |
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398 | |
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399 | |
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400 | // tab-width: 4 |
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401 | // c-basic-offset: 4 |
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402 | // c-file-offsets:((innamespace . 0)(inline-open . 0)) |
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403 | // indent-tabs-mode: nil |
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404 | // End: |
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405 | // vim: filetype=c:expandtab:shiftwidth=4:tabstop=4:softtabstop=4 |
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406 | |
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