1 | /* |
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2 | * dev_ioc.c - IOC (Block Device Controler) generic device API implementation. |
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3 | * |
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4 | * Author Alain Greiner (2016) |
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5 | * |
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6 | * Copyright (c) UPMC Sorbonne Universites |
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7 | * |
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8 | * This file is part of ALMOS-MK |
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9 | * |
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10 | * ALMOS-MKH.is free software; you can redistribute it and/or modify it |
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11 | * under the terms of the GNU General Public License as published by |
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12 | * the Free Software Foundation; version 2.0 of the License. |
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13 | * |
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14 | * ALMOS-MKH.is distributed in the hope that it will be useful, but |
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15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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17 | * General Public License for more details. |
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18 | * |
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19 | * You should have received a copy of the GNU General Public License |
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20 | * along with ALMOS-kernel; if not, write to the Free Software Foundation, |
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21 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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22 | */ |
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23 | |
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24 | #include <kernel_config.h> |
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25 | #include <hal_types.h> |
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26 | #include <hal_gpt.h> |
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27 | #include <soclib_bdv.h> |
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28 | #include <soclib_hba.h> |
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29 | //#include <soclib_sdc.h> |
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30 | //#include <soclib_spi.h> |
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31 | //#include <soclib_rdk.h> |
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32 | #include <thread.h> |
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33 | #include <printk.h> |
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34 | #include <chdev.h> |
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35 | #include <dev_ioc.h> |
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36 | |
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37 | ///////////////////////////////////////////////////////////////////////////////////////// |
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38 | // Extern global variables |
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39 | ///////////////////////////////////////////////////////////////////////////////////////// |
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40 | |
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41 | extern chdev_directory_t chdev_dir; // allocated in kernel_init.c |
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42 | |
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43 | extern chdev_pic_input_t chdev_pic_input; // allocated in kernel_init.c |
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44 | |
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45 | //////////////////////////////////// |
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46 | void dev_ioc_init( chdev_t * chdev ) |
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47 | { |
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48 | // the local ICU chdev must be initialized before the IOC chdev, because |
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49 | // the IOC chdev initialisation requires allocation of a WTI from local ICU |
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50 | xptr_t icu_xp = chdev_dir.icu[local_cxy]; |
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51 | assert( (icu_xp != XPTR_NULL) , __FUNCTION__ , "ICU not initialised before IOC" ); |
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52 | |
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53 | // get implementation and channel from chdev descriptor |
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54 | uint32_t impl = chdev->impl; |
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55 | uint32_t channel = chdev->channel; |
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56 | |
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57 | // set driver specific fields in chdev descriptor and call driver init function |
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58 | if( impl == IMPL_IOC_BDV ) |
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59 | { |
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60 | chdev->cmd = &soclib_bdv_cmd; |
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61 | chdev->isr = &soclib_bdv_isr; |
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62 | soclib_bdv_init( chdev ); |
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63 | } |
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64 | else if( impl == IMPL_IOC_HBA ) |
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65 | { |
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66 | chdev->cmd = &soclib_hba_command; |
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67 | chdev->isr = &soclib_hba_isr; |
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68 | soclib_hba_init( chdev ); |
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69 | } |
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70 | else |
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71 | { |
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72 | assert( false , __FUNCTION__ , "undefined IOC device implementation" ); |
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73 | } |
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74 | |
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75 | // get a WTI mailbox from local ICU |
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76 | uint32_t wti_id = dev_icu_wti_alloc(); |
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77 | |
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78 | assert( (wti_id != -1) , __FUNCTION__ , "cannot allocate WTI mailbox" ); |
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79 | |
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80 | // select a core |
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81 | lid_t lid = cluster_select_local_core(); |
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82 | |
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83 | // enable WTI IRQ and update WTI interrupt vector |
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84 | dev_icu_enable_irq( lid , WTI_TYPE , wti_id , chdev ); |
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85 | |
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86 | // link IOC IRQ to WTI mailbox in PIC component |
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87 | uint32_t irq_id = chdev_pic_input.ioc[channel]; |
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88 | dev_pic_bind_irq( irq_id , local_cxy , wti_id ); |
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89 | |
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90 | // create server thread |
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91 | thread_t * new_thread; |
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92 | error_t error; |
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93 | |
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94 | error = thread_kernel_create( &new_thread, |
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95 | THREAD_DEV, |
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96 | &chdev_sequencial_server, |
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97 | chdev, |
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98 | lid ); |
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99 | assert( (error == 0) , __FUNCTION__ , "cannot create server thread" ); |
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100 | |
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101 | // set "server" field in chdev descriptor |
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102 | chdev->server = new_thread; |
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103 | |
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104 | // start server thread |
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105 | thread_unblock( XPTR( local_cxy , new_thread ) , THREAD_BLOCKED_GLOBAL ); |
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106 | |
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107 | } // end dev_ioc_init() |
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108 | |
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109 | ////////////////////////////////////////////////////////////////////////////////// |
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110 | // This static function is called by dev_ioc_read() & dev_ioc_write() functions. |
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111 | // It builds and registers the command in the calling thread descriptor, after |
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112 | // translation of buffer virtual address to physical address. |
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113 | // Then, it registers the calling thead in chdev waiting queue. |
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114 | // Finally it blocks on the THREAD_BLOCKED_DEV condition and deschedule. |
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115 | ////////////////////////////////////i///////////////////////////////////////////// |
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116 | static error_t dev_ioc_access( bool_t to_mem, |
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117 | char * buffer, |
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118 | uint32_t lba, |
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119 | uint32_t count ) |
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120 | { |
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121 | thread_t * this = CURRENT_THREAD; // pointer on client thread |
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122 | |
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123 | error_t error; |
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124 | paddr_t buf_paddr; |
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125 | |
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126 | // Get buffer physical address |
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127 | error = vmm_v2p_translate( CONFIG_KERNEL_IDENTITY , buffer , &buf_paddr ); |
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128 | |
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129 | if( error ) return EINVAL; |
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130 | |
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131 | ioc_dmsg("\n[INFO] in %s : thread %x in process %x" |
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132 | " for lba = %x / vaddr = %x / paddr = %l / at cycle %d\n", |
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133 | __FUNCTION__ , this->trdid , this->process->pid , |
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134 | lba , (uint32_t)buffer , buf_paddr , hal_time_stamp() ); |
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135 | |
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136 | #if USE_IOB // software L2/L3 cache coherence for memory buffer |
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137 | |
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138 | if ( to_mem ) dev_mmc_inval( buf_paddr, count<<9 ); |
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139 | else dev_mmc_sync( buf_paddr, count<<9 ); |
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140 | |
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141 | #endif // end software L2/L3 cache coherence |
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142 | |
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143 | // get extended pointer on IOC chdev descriptor |
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144 | xptr_t dev_xp = chdev_dir.ioc[0]; |
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145 | |
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146 | assert( (dev_xp != XPTR_NULL) , __FUNCTION__ , "undefined IOC chdev descriptor" ); |
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147 | |
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148 | // register command in calling thread descriptor |
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149 | this->command.ioc.dev_xp = dev_xp; |
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150 | this->command.ioc.to_mem = to_mem; |
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151 | this->command.ioc.buf_xp = XPTR( local_cxy , buffer ); |
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152 | this->command.ioc.lba = lba; |
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153 | this->command.ioc.count = count; |
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154 | |
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155 | // register client thread in IOC chdev waiting queue, activate server thread, |
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156 | // block client thread on THREAD_BLOCKED_IO and deschedule. |
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157 | // it is re-activated by the ISR signaling IO operation completion. |
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158 | chdev_register_command( dev_xp , this ); |
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159 | |
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160 | ioc_dmsg("\n[INFO] in %s : thread %x in process %x" |
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161 | " completes / error = %d / at cycle %d\n", |
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162 | __FUNCTION__ , this->trdid , this->process->pid , |
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163 | this->dev.ioc.error , hal_time_stamp() ); |
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164 | |
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165 | // return I/O operation status |
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166 | return this->command.ioc.error; |
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167 | |
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168 | } // end dev_ioc_access() |
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169 | |
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170 | //////////////////////////////////////////// |
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171 | error_t dev_ioc_read( char * buffer, |
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172 | uint32_t lba, |
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173 | uint32_t count ) |
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174 | { |
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175 | return dev_ioc_access( true , buffer , lba , count ); |
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176 | } |
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177 | |
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178 | //////////////////////////////////////////// |
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179 | error_t dev_ioc_write( char * buffer, |
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180 | uint32_t lba, |
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181 | uint32_t count ) |
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182 | { |
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183 | return dev_ioc_access( false , buffer , lba , count ); |
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184 | } |
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