1 | /////////////////////////////////////////////////////////////////////////////////// |
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2 | // File : hba_driver.h |
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3 | // Date : 01/11/2013 |
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4 | // Author : alain greiner and zhang |
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5 | // Copyright (c) UPMC-LIP6 |
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6 | /////////////////////////////////////////////////////////////////////////////////// |
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7 | // The hba_driver.c and hba_driver.h files are part ot the GIET-VM kernel. |
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8 | // This driver supports the SocLib VciMultiAhci component, that is a multi-channels, |
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9 | // block oriented, external storage contrÃŽler, respecting the AHCI standard. |
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10 | // |
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11 | // The SEG_IOC_BASE virtual address must be defined in the hard_config.h file. |
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12 | ////////////////////////////////////////////////////////////////////////////////// |
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13 | |
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14 | #ifndef _GIET_HBA_DRIVERS_H_ |
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15 | #define _GIET_HBA_DRIVERS_H_ |
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16 | |
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17 | /////////////////////////////////////////////////////////////////////////////////// |
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18 | // HBA component registers offsets |
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19 | /////////////////////////////////////////////////////////////////////////////////// |
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20 | |
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21 | enum SoclibMultiAhciRegisters |
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22 | { |
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23 | HBA_PXCLB = 0, // command list base address 32 LSB bits |
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24 | HBA_PXCLBU = 1, // command list base address 32 MSB bits |
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25 | HBA_PXIS = 4, // interrupt status |
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26 | HBA_PXIE = 5, // interrupt enable |
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27 | HBA_PXCMD = 6, // run |
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28 | HBA_PXCI = 14, // command bit-vector |
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29 | HBA_SPAN = 0x400, // 4 Kbytes per channel => 1024 slots |
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30 | }; |
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31 | |
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32 | /////////////////////////////////////////////////////////////////////////////////// |
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33 | // Data structures for command table array |
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34 | /////////////////////////////////////////////////////////////////////////////////// |
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35 | |
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36 | typedef struct hba_cmd_header_s // size = 128 bytes |
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37 | { |
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38 | // WORD 0 |
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39 | unsigned int res0; // reserved |
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40 | |
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41 | // WORD 1 |
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42 | unsigned char lba0; // LBA 7:0 |
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43 | unsigned char lba1; // LBA 15:8 |
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44 | unsigned char lba2; // LBA 23:16 |
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45 | unsigned char res1; // reserved |
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46 | |
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47 | // WORD 2 |
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48 | unsigned char lba3; // LBA 31:24 |
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49 | unsigned char lba4; // LBA 39:32 |
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50 | unsigned char lba5; // LBA 47:40 |
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51 | unsigned char res2; // reserved |
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52 | |
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53 | // WORD 3 to 31 |
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54 | unsigned int res[29]; // reserved |
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55 | |
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56 | } hba_cmd_header_t; |
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57 | |
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58 | typedef struct hba_cmd_entry_s // size = 16 bytes |
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59 | { |
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60 | unsigned int dba; // Buffer base address 32 LSB bits |
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61 | unsigned int dbau; // Buffer base address 32 MSB bits |
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62 | unsigned int res0; // reserved |
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63 | unsigned int dbc; // Buffer byte count |
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64 | |
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65 | } hba_cmd_entry_t; |
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66 | |
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67 | typedef struct hba_cmd_table_s // size = 4096 bytes |
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68 | { |
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69 | |
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70 | hba_cmd_header_t header; // contains LBA |
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71 | hba_cmd_entry_t entry[248]; // 248 buffers max |
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72 | |
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73 | } hba_cmd_table_t; |
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74 | |
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75 | /////////////////////////////////////////////////////////////////////////////////// |
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76 | // Data structures for command list array |
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77 | /////////////////////////////////////////////////////////////////////////////////// |
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78 | |
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79 | typedef struct hba_cmd_desc_s // size = 16 bytes |
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80 | { |
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81 | // WORD 0 |
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82 | unsigned char flag[2]; // W in bit 6 of flag[0] |
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83 | unsigned char prdtl[2]; // Number of buffers |
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84 | |
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85 | // WORD 1 |
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86 | unsigned int prdbc; // Number of bytes actually transfered |
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87 | |
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88 | // WORD 2, WORD 3 |
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89 | unsigned int ctba; // Command Table base address 32 LSB bits |
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90 | unsigned int ctbau; // Command Table base address 32 MSB bits |
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91 | |
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92 | } hba_cmd_desc_t; |
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93 | |
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94 | typedef struct hba_cmd_list_s // size = 512 bytes |
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95 | { |
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96 | // 32 command descriptors |
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97 | hba_cmd_desc_t desc[32]; |
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98 | |
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99 | } hba_cmd_list_t; |
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100 | |
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101 | /////////////////////////////////////////////////////////////////////////////////// |
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102 | // access functions |
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103 | /////////////////////////////////////////////////////////////////////////////////// |
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104 | |
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105 | /////////////////////////////////////////////////////////////////////////////////// |
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106 | // This function initializes for a given channel |
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107 | // - the HBA hardware registers, |
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108 | // - the command list pointer, |
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109 | // - the command lists physical addresse, |
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110 | // - the command tables physical addresses array, |
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111 | /////////////////////////////////////////////////////////////////////////////////// |
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112 | extern unsigned int _hba_init ( unsigned int channel ); |
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113 | |
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114 | /////////////////////////////////////////////////////////////////////////////////// |
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115 | // This function register a write command in Command List and Command Table |
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116 | // for a single physical buffer, and updates the HBA_PXCI register. |
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117 | // Returns 0 if success, > 0 if error. |
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118 | /////////////////////////////////////////////////////////////////////////////////// |
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119 | extern unsigned int _hba_write( unsigned int channel, // channel index |
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120 | unsigned int mode, // BOOT / KERNEL / USER |
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121 | unsigned int lba, // logic bloc address on device |
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122 | unsigned long long paddr, // memory buffer base address |
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123 | unsigned int count ); // number of blocs |
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124 | |
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125 | ////////////////////////////////////////////////////////////////////////////////// |
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126 | // This function register a read command in Command List and Command Table |
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127 | // for a single physical buffer, and updates the HBA_PXCI register. |
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128 | // Returns 0 if success, > 0 if error. |
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129 | ////////////////////////////////////////////////////////////////////////////////// |
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130 | extern unsigned int _hba_read ( unsigned int channel, // channel index |
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131 | unsigned int mode, // BOOT / KERNEL / USER |
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132 | unsigned int lba, // logic bloc address on device |
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133 | unsigned long long paddr, // memory buffer base address |
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134 | unsigned int count ); // number of blocks |
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135 | |
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136 | ///////////////////////////////////////////////////////////////////////////////// |
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137 | // This function returns the block_size of HBA controller |
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138 | ///////////////////////////////////////////////////////////////////////////////// |
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139 | extern unsigned int _hba_get_block_size (); |
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140 | |
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141 | ///////////////////////////////////////////////////////////////////////////////////// |
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142 | // This function returns the content of the HBA_PXIS register for a given channel, |
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143 | // and reset this register to acknoledge IRQ. |
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144 | // return 0 if success, > 0 if error |
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145 | ///////////////////////////////////////////////////////////////////////////////////// |
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146 | extern unsigned int _hba_get_status( unsigned int channel ); |
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147 | |
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148 | |
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149 | #endif |
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150 | |
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151 | // Local Variables: |
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152 | // tab-width: 4 |
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153 | // c-basic-offset: 4 |
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154 | // c-file-offsets:((innamespace . 0)(inline-open . 0)) |
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155 | // indent-tabs-mode: nil |
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156 | // End: |
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157 | // vim: filetype=c:expandtab:shiftwidth=4:tabstop=4:softtabstop=4 |
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158 | |
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