1 | /* |
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2 | * devfs.c - DEVFS File system API implementation. |
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3 | * |
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4 | * Author Mohamed Lamine Karaoui (2014,2015) |
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5 | * Alain Greiner (2016,2017) |
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6 | * |
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7 | * Copyright (c) Sorbonne Universites |
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8 | * |
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9 | * This file is part of ALMOS-MKH. |
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10 | * |
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11 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
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12 | * under the terms of the GNU General Public License as published by |
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13 | * the Free Software Foundation; version 2.0 of the License. |
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14 | * |
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15 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
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16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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18 | * General Public License for more details. |
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19 | * |
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20 | * You should have received a copy of the GNU General Public License |
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21 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
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22 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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23 | */ |
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24 | |
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25 | #include <hal_types.h> |
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26 | #include <hal_special.h> |
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27 | #include <printk.h> |
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28 | #include <chdev.h> |
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29 | #include <cluster.h> |
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30 | #include <vfs.h> |
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31 | #include <kmem.h> |
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32 | #include <devfs.h> |
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33 | |
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34 | ///////////////////////////////////////////////////////////////////////////////////////// |
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35 | // Extern variables |
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36 | ///////////////////////////////////////////////////////////////////////////////////////// |
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37 | |
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38 | extern vfs_ctx_t fs_context[]; // allocated in kernel_init.c |
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39 | extern chdev_directory_t chdev_dir; // allocated in kernel_init.c |
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40 | |
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41 | /////////////////////////////// |
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42 | devfs_ctx_t * devfs_ctx_alloc() |
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43 | { |
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44 | kmem_req_t req; |
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45 | |
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46 | req.type = KMEM_DEVFS_CTX; |
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47 | req.size = sizeof(devfs_ctx_t); |
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48 | req.flags = AF_KERNEL | AF_ZERO; |
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49 | |
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50 | return (devfs_ctx_t *)kmem_alloc( &req ); |
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51 | } |
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52 | |
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53 | ///////////////////////////////////////////// |
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54 | void devfs_ctx_init( devfs_ctx_t * devfs_ctx, |
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55 | xptr_t devfs_dev_inode_xp, |
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56 | xptr_t devfs_external_inode_xp ) |
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57 | { |
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58 | devfs_ctx->dev_inode_xp = devfs_dev_inode_xp; |
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59 | devfs_ctx->external_inode_xp = devfs_external_inode_xp; |
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60 | |
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61 | fs_context[FS_TYPE_DEVFS].extend = devfs_ctx; |
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62 | } |
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63 | |
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64 | ///////////////////////////////////////////////// |
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65 | void devfs_ctx_destroy( devfs_ctx_t * devfs_ctx ) |
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66 | { |
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67 | kmem_req_t req; |
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68 | |
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69 | req.type = KMEM_DEVFS_CTX; |
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70 | req.ptr = devfs_ctx; |
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71 | kmem_free( &req ); |
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72 | } |
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73 | |
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74 | /////////////////////////////////////////////////// |
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75 | void devfs_global_init( xptr_t parent_inode_xp, |
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76 | xptr_t * devfs_dev_inode_xp, |
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77 | xptr_t * devfs_external_inode_xp ) |
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78 | { |
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79 | error_t error; |
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80 | |
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81 | // creates DEVFS "dev" inode in cluster IO |
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82 | error = vfs_add_child_in_parent( LOCAL_CLUSTER->io_cxy, |
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83 | INODE_TYPE_DIR, |
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84 | FS_TYPE_DEVFS, |
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85 | parent_inode_xp, |
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86 | "dev", |
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87 | NULL, |
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88 | devfs_dev_inode_xp ); |
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89 | |
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90 | nolock_assert( (error == 0) , __FUNCTION__ , "cannot create <dev>\n" ); |
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91 | |
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92 | // create DEVFS "external" inode in cluster IO |
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93 | error = vfs_add_child_in_parent( LOCAL_CLUSTER->io_cxy, |
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94 | INODE_TYPE_DIR, |
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95 | FS_TYPE_DEVFS, |
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96 | *devfs_dev_inode_xp, |
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97 | "external", |
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98 | NULL, |
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99 | devfs_external_inode_xp ); |
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100 | |
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101 | nolock_assert( (error == 0) , __FUNCTION__ , "cannot create <external>\n" ); |
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102 | } |
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103 | |
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104 | /////////////////////////////////////////////////// |
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105 | void devfs_local_init( xptr_t devfs_dev_inode_xp, |
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106 | xptr_t devfs_external_inode_xp, |
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107 | xptr_t * devfs_internal_inode_xp ) |
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108 | { |
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109 | char node_name[16]; |
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110 | xptr_t chdev_xp; |
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111 | cxy_t chdev_cxy; |
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112 | xptr_t inode_xp; |
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113 | uint32_t channel; |
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114 | |
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115 | // create "internal" directory linked to "dev" |
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116 | snprintf( node_name , 16 , "internal_%x" , local_cxy ); |
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117 | vfs_add_child_in_parent( local_cxy, |
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118 | INODE_TYPE_DIR, |
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119 | FS_TYPE_DEVFS, |
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120 | devfs_dev_inode_xp, |
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121 | node_name, |
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122 | NULL, |
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123 | devfs_internal_inode_xp ); |
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124 | |
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125 | // create MMC chdev inode |
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126 | chdev_xp = chdev_dir.mmc[local_cxy]; |
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127 | if( chdev_xp != XPTR_NULL) |
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128 | { |
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129 | vfs_add_child_in_parent( local_cxy, |
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130 | INODE_TYPE_DEV, |
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131 | FS_TYPE_DEVFS, |
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132 | *devfs_internal_inode_xp, |
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133 | "mmc", |
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134 | GET_PTR( chdev_xp ), |
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135 | &inode_xp ); |
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136 | } |
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137 | |
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138 | // create DMA chdev inodes (one DMA channel per core) |
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139 | for( channel = 0 ; channel < LOCAL_CLUSTER->cores_nr ; channel++ ) |
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140 | { |
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141 | chdev_xp = chdev_dir.dma[channel]; |
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142 | if( chdev_xp != XPTR_NULL) |
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143 | { |
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144 | snprintf( node_name , 16 , "dma_%d" , channel ); |
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145 | vfs_add_child_in_parent( local_cxy, |
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146 | INODE_TYPE_DEV, |
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147 | FS_TYPE_DEVFS, |
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148 | *devfs_internal_inode_xp, |
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149 | node_name, |
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150 | GET_PTR( chdev_xp ), |
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151 | &inode_xp ); |
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152 | } |
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153 | } |
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154 | |
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155 | // create an IOB inode in cluster containing IOB chdev |
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156 | chdev_xp = chdev_dir.iob; |
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157 | if( chdev_xp != XPTR_NULL ) |
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158 | { |
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159 | chdev_cxy = GET_CXY( chdev_xp ); |
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160 | if( chdev_cxy == local_cxy ) |
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161 | { |
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162 | vfs_add_child_in_parent( local_cxy, |
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163 | INODE_TYPE_DEV, |
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164 | FS_TYPE_DEVFS, |
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165 | devfs_external_inode_xp, |
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166 | "iob", |
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167 | GET_PTR( chdev_xp ), |
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168 | &inode_xp ); |
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169 | } |
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170 | } |
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171 | |
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172 | // create a PIC inode in cluster containing PIC chdev |
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173 | chdev_xp = chdev_dir.pic; |
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174 | if( chdev_xp != XPTR_NULL ) |
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175 | { |
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176 | chdev_cxy = GET_CXY( chdev_xp ); |
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177 | if( chdev_cxy == local_cxy ) |
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178 | { |
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179 | vfs_add_child_in_parent( local_cxy, |
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180 | INODE_TYPE_DEV, |
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181 | FS_TYPE_DEVFS, |
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182 | devfs_external_inode_xp, |
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183 | "pic", |
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184 | GET_PTR( chdev_xp ), |
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185 | &inode_xp ); |
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186 | } |
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187 | } |
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188 | |
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189 | // create a TXT inode in each cluster containing a TXT chdev |
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190 | for( channel = 0 ; channel < CONFIG_MAX_TXT_CHANNELS ; channel++ ) |
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191 | { |
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192 | chdev_xp = chdev_dir.txt[channel]; |
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193 | if( chdev_xp != XPTR_NULL ) |
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194 | { |
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195 | chdev_cxy = GET_CXY( chdev_xp ); |
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196 | if( chdev_cxy == local_cxy ) |
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197 | { |
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198 | snprintf( node_name , 16 , "txt_%d" , channel ); |
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199 | vfs_add_child_in_parent( local_cxy, |
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200 | INODE_TYPE_DEV, |
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201 | FS_TYPE_DEVFS, |
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202 | devfs_external_inode_xp, |
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203 | node_name, |
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204 | GET_PTR( chdev_xp ), |
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205 | &inode_xp ); |
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206 | } |
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207 | } |
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208 | } |
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209 | |
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210 | // create an IOC inode in each cluster containing an IOC chdev |
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211 | for( channel = 0 ; channel < CONFIG_MAX_IOC_CHANNELS ; channel++ ) |
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212 | { |
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213 | chdev_xp = chdev_dir.ioc[channel]; |
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214 | if( chdev_xp != XPTR_NULL ) |
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215 | { |
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216 | chdev_cxy = GET_CXY( chdev_xp ); |
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217 | if( chdev_cxy == local_cxy ) |
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218 | { |
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219 | snprintf( node_name , 16 , "ioc_%d" , channel ); |
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220 | vfs_add_child_in_parent( local_cxy, |
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221 | INODE_TYPE_DEV, |
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222 | FS_TYPE_DEVFS, |
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223 | devfs_external_inode_xp, |
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224 | node_name, |
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225 | GET_PTR( chdev_xp ), |
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226 | &inode_xp ); |
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227 | } |
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228 | } |
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229 | } |
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230 | |
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231 | // create a FBF inode in each cluster containing a FBF chdev |
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232 | for( channel = 0 ; channel < CONFIG_MAX_IOC_CHANNELS ; channel++ ) |
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233 | { |
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234 | chdev_xp = chdev_dir.fbf[channel]; |
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235 | if( chdev_xp != XPTR_NULL ) |
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236 | { |
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237 | chdev_cxy = GET_CXY( chdev_xp ); |
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238 | if( chdev_cxy == local_cxy ) |
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239 | { |
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240 | snprintf( node_name , 16 , "fbf_%d" , channel ); |
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241 | vfs_add_child_in_parent( local_cxy, |
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242 | INODE_TYPE_DEV, |
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243 | FS_TYPE_DEVFS, |
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244 | devfs_external_inode_xp, |
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245 | node_name, |
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246 | GET_PTR( chdev_xp ), |
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247 | &inode_xp ); |
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248 | } |
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249 | } |
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250 | } |
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251 | |
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252 | // create a NIC_RX inode in each cluster containing a NIC_RX chdev |
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253 | for( channel = 0 ; channel < CONFIG_MAX_NIC_CHANNELS ; channel++ ) |
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254 | { |
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255 | chdev_xp = chdev_dir.nic_rx[channel]; |
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256 | if( chdev_xp != XPTR_NULL ) |
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257 | { |
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258 | chdev_cxy = GET_CXY( chdev_xp ); |
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259 | if( chdev_cxy == local_cxy ) |
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260 | { |
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261 | snprintf( node_name , 16 , "nic_rx_%d" , channel ); |
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262 | vfs_add_child_in_parent( local_cxy, |
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263 | INODE_TYPE_DEV, |
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264 | FS_TYPE_DEVFS, |
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265 | devfs_external_inode_xp, |
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266 | node_name, |
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267 | GET_PTR( chdev_xp ), |
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268 | &inode_xp ); |
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269 | } |
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270 | } |
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271 | } |
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272 | |
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273 | // create a NIC_TX inode in each cluster containing a NIC_TX chdev |
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274 | for( channel = 0 ; channel < CONFIG_MAX_NIC_CHANNELS ; channel++ ) |
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275 | { |
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276 | chdev_xp = chdev_dir.nic_tx[channel]; |
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277 | if( chdev_xp != XPTR_NULL ) |
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278 | { |
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279 | chdev_cxy = GET_CXY( chdev_xp ); |
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280 | if( chdev_cxy == local_cxy ) |
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281 | { |
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282 | snprintf( node_name , 16 , "nic_tx_%d" , channel ); |
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283 | vfs_add_child_in_parent( local_cxy, |
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284 | INODE_TYPE_DEV, |
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285 | FS_TYPE_DEVFS, |
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286 | devfs_external_inode_xp, |
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287 | node_name, |
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288 | GET_PTR( chdev_xp ), |
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289 | &inode_xp ); |
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290 | } |
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291 | } |
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292 | } |
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293 | } // end devfs_local_init() |
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294 | |
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