1 | /* |
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2 | * cluster.c - Cluster-Manager related operations |
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3 | * |
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4 | * Author Ghassan Almaless (2008,2009,2010,2011,2012) |
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5 | * Mohamed Lamine Karaoui (2015) |
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6 | * Alain Greiner (2016,2017) |
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7 | * |
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8 | * Copyright (c) UPMC Sorbonne Universites |
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9 | * |
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10 | * This file is part of ALMOS-MKH.. |
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11 | * |
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12 | * ALMOS-MKH. is free software; you can redistribute it and/or modify it |
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13 | * under the terms of the GNU General Public License as published by |
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14 | * the Free Software Foundation; version 2.0 of the License. |
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15 | * |
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16 | * ALMOS-MKH. is distributed in the hope that it will be useful, but |
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17 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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19 | * General Public License for more details. |
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20 | * |
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21 | * You should have received a copy of the GNU General Public License |
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22 | * along with ALMOS-MKH.; if not, write to the Free Software Foundation, |
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23 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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24 | */ |
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25 | |
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26 | #include <kernel_config.h> |
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27 | #include <hal_types.h> |
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28 | #include <hal_atomic.h> |
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29 | #include <hal_special.h> |
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30 | #include <hal_ppm.h> |
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31 | #include <remote_fifo.h> |
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32 | #include <printk.h> |
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33 | #include <errno.h> |
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34 | #include <spinlock.h> |
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35 | #include <core.h> |
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36 | #include <scheduler.h> |
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37 | #include <list.h> |
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38 | #include <cluster.h> |
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39 | #include <boot_info.h> |
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40 | #include <bits.h> |
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41 | #include <ppm.h> |
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42 | #include <thread.h> |
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43 | #include <kmem.h> |
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44 | #include <process.h> |
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45 | #include <dqdt.h> |
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46 | |
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47 | ///////////////////////////////////////////////////////////////////////////////////// |
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48 | // Extern global variables |
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49 | ///////////////////////////////////////////////////////////////////////////////////// |
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50 | |
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51 | extern process_t process_zero; // allocated in kernel_init.c file |
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52 | |
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53 | |
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54 | ///////////////////////////////////////////////// |
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55 | error_t cluster_init( struct boot_info_s * info ) |
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56 | { |
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57 | error_t error; |
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58 | lpid_t lpid; // local process_index |
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59 | lid_t lid; // local core index |
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60 | uint32_t i; // index in loop on external peripherals |
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61 | boot_device_t * dev; // pointer on external peripheral |
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62 | uint32_t func; // external peripheral functionnal type |
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63 | |
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64 | cluster_t * cluster = LOCAL_CLUSTER; |
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65 | |
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66 | // initialize cluster global parameters |
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67 | cluster->paddr_width = info->paddr_width; |
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68 | cluster->x_width = info->x_width; |
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69 | cluster->y_width = info->y_width; |
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70 | cluster->x_size = info->x_size; |
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71 | cluster->y_size = info->y_size; |
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72 | cluster->io_cxy = info->io_cxy; |
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73 | |
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74 | // initialize external peripherals channels |
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75 | for( i = 0 ; i < info->ext_dev_nr ; i++ ) |
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76 | { |
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77 | dev = &info->ext_dev[i]; |
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78 | func = FUNC_FROM_TYPE( dev->type ); |
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79 | if( func == DEV_FUNC_TXT ) cluster->nb_txt_channels = dev->channels; |
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80 | if( func == DEV_FUNC_NIC ) cluster->nb_nic_channels = dev->channels; |
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81 | if( func == DEV_FUNC_IOC ) cluster->nb_ioc_channels = dev->channels; |
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82 | if( func == DEV_FUNC_FBF ) cluster->nb_fbf_channels = dev->channels; |
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83 | } |
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84 | |
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85 | // initialize cluster local parameters |
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86 | cluster->cores_nr = info->cores_nr; |
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87 | |
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88 | // initialize the lock protecting the embedded kcm allocator |
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89 | spinlock_init( &cluster->kcm_lock ); |
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90 | |
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91 | cluster_dmsg("\n[DBG] %s for cluster %x enters\n", |
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92 | __FUNCTION__ , local_cxy ); |
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93 | |
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94 | // initialises DQDT |
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95 | cluster->dqdt_root_level = dqdt_init( info->x_size, |
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96 | info->y_size, |
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97 | info->y_width ); |
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98 | cluster->threads_var = 0; |
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99 | cluster->pages_var = 0; |
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100 | |
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101 | // initialises embedded PPM |
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102 | error = hal_ppm_init( info ); |
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103 | |
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104 | if( error ) |
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105 | { |
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106 | printk("\n[ERROR] in %s : cannot initialize PPM in cluster %x\n", |
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107 | __FUNCTION__ , local_cxy ); |
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108 | return ENOMEM; |
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109 | } |
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110 | |
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111 | cluster_dmsg("\n[DBG] %s : PPM initialized in cluster %x at cycle %d\n", |
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112 | __FUNCTION__ , local_cxy , hal_get_cycles() ); |
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113 | |
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114 | // initialises embedded KHM |
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115 | khm_init( &cluster->khm ); |
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116 | |
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117 | cluster_dmsg("\n[DBG] %s : KHM initialized in cluster %x at cycle %d\n", |
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118 | __FUNCTION__ , local_cxy , hal_get_cycles() ); |
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119 | |
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120 | // initialises embedded KCM |
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121 | kcm_init( &cluster->kcm , KMEM_KCM ); |
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122 | |
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123 | cluster_dmsg("\n[DBG] %s : KCM initialized in cluster %x at cycle %d\n", |
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124 | __FUNCTION__ , local_cxy , hal_get_cycles() ); |
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125 | |
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126 | // initialises all cores descriptors |
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127 | for( lid = 0 ; lid < cluster->cores_nr; lid++ ) |
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128 | { |
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129 | core_init( &cluster->core_tbl[lid], // target core descriptor |
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130 | lid, // local core index |
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131 | info->core[lid].gid ); // gid from boot_info_t |
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132 | } |
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133 | |
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134 | cluster_dmsg("\n[DBG] %s : cores initialized in cluster %x at cycle %d\n", |
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135 | __FUNCTION__ , local_cxy , hal_get_cycles() ); |
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136 | |
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137 | // initialises RPC fifo |
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138 | local_fifo_init( &cluster->rpc_fifo ); |
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139 | cluster->rpc_threads = 0; |
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140 | |
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141 | cluster_dmsg("\n[DBG] %s : RPC fifo inialized in cluster %x at cycle %d\n", |
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142 | __FUNCTION__ , local_cxy , hal_get_cycles() ); |
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143 | |
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144 | // initialise pref_tbl[] in process manager |
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145 | spinlock_init( &cluster->pmgr.pref_lock ); |
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146 | cluster->pmgr.pref_nr = 0; |
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147 | cluster->pmgr.pref_tbl[0] = XPTR( local_cxy , &process_zero ); |
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148 | for( lpid = 1 ; lpid < CONFIG_MAX_PROCESS_PER_CLUSTER ; lpid++ ) |
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149 | { |
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150 | cluster->pmgr.pref_tbl[lpid] = XPTR_NULL; |
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151 | } |
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152 | |
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153 | // initialise local_list in process manager |
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154 | remote_spinlock_init( XPTR( local_cxy , &cluster->pmgr.local_lock ) ); |
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155 | xlist_root_init( XPTR( local_cxy , &cluster->pmgr.local_root ) ); |
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156 | cluster->pmgr.local_nr = 0; |
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157 | |
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158 | // initialise copies_lists in process manager |
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159 | for( lpid = 0 ; lpid < CONFIG_MAX_PROCESS_PER_CLUSTER ; lpid++ ) |
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160 | { |
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161 | remote_spinlock_init( XPTR( local_cxy , &cluster->pmgr.copies_lock[lpid] ) ); |
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162 | cluster->pmgr.copies_nr[lpid] = 0; |
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163 | xlist_root_init( XPTR( local_cxy , &cluster->pmgr.copies_root[lpid] ) ); |
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164 | } |
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165 | |
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166 | cluster_dmsg("\n[DBG] %s Process Manager initialized in cluster %x at cycle %d\n", |
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167 | __FUNCTION__ , local_cxy , hal_get_cycles() ); |
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168 | |
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169 | hal_fence(); |
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170 | |
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171 | return 0; |
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172 | } // end cluster_init() |
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173 | |
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174 | //////////////////////////////////////// |
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175 | bool_t cluster_is_undefined( cxy_t cxy ) |
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176 | { |
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177 | cluster_t * cluster = LOCAL_CLUSTER; |
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178 | |
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179 | uint32_t y_width = cluster->y_width; |
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180 | |
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181 | uint32_t x = cxy >> y_width; |
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182 | uint32_t y = cxy & ((1<<y_width)-1); |
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183 | |
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184 | if( x >= cluster->x_size ) return true; |
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185 | if( y >= cluster->y_size ) return true; |
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186 | |
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187 | return false; |
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188 | } |
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189 | |
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190 | //////////////////////////////////////////////////////////////////////////////////// |
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191 | // Cores related functions |
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192 | //////////////////////////////////////////////////////////////////////////////////// |
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193 | |
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194 | ///////////////////////////////// |
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195 | lid_t cluster_select_local_core() |
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196 | { |
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197 | uint32_t min = 100; |
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198 | lid_t sel = 0; |
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199 | lid_t lid; |
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200 | |
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201 | cluster_t * cluster = LOCAL_CLUSTER; |
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202 | |
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203 | for( lid = 0 ; lid < cluster->cores_nr ; lid++ ) |
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204 | { |
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205 | if( cluster->core_tbl[lid].usage < min ) |
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206 | { |
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207 | min = cluster->core_tbl[lid].usage; |
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208 | sel = lid; |
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209 | } |
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210 | } |
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211 | return sel; |
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212 | } |
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213 | |
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214 | //////////////////////////////////////////////////////////////////////////////////// |
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215 | // Process related functions |
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216 | //////////////////////////////////////////////////////////////////////////////////// |
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217 | |
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218 | ////////////////////////////////////////////////////////// |
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219 | xptr_t cluster_get_reference_process_from_pid( pid_t pid ) |
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220 | { |
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221 | xptr_t ref_xp; // extended pointer on reference process descriptor |
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222 | |
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223 | cluster_t * cluster = LOCAL_CLUSTER; |
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224 | |
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225 | // get owner cluster and lpid |
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226 | cxy_t owner_cxy = CXY_FROM_PID( pid ); |
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227 | lpid_t lpid = LPID_FROM_PID( pid ); |
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228 | |
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229 | // Check valid PID |
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230 | if( lpid >= CONFIG_MAX_PROCESS_PER_CLUSTER ) return XPTR_NULL; |
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231 | |
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232 | if( local_cxy == owner_cxy ) // local cluster is owner cluster |
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233 | { |
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234 | ref_xp = cluster->pmgr.pref_tbl[lpid]; |
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235 | } |
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236 | else // use a remote_lwd to access owner cluster |
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237 | { |
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238 | ref_xp = (xptr_t)hal_remote_lwd( XPTR( owner_cxy , &cluster->pmgr.pref_tbl[lpid] ) ); |
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239 | } |
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240 | |
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241 | return ref_xp; |
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242 | } |
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243 | |
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244 | /////////////////////////////////////////////// |
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245 | error_t cluster_pid_alloc( process_t * process, |
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246 | pid_t * pid ) |
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247 | { |
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248 | lpid_t lpid; |
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249 | bool_t found; |
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250 | |
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251 | pmgr_t * pm = &LOCAL_CLUSTER->pmgr; |
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252 | |
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253 | // get the process manager lock |
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254 | spinlock_lock( &pm->pref_lock ); |
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255 | |
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256 | // search an empty slot |
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257 | found = false; |
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258 | for( lpid = 0 ; lpid < CONFIG_MAX_PROCESS_PER_CLUSTER ; lpid++ ) |
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259 | { |
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260 | if( pm->pref_tbl[lpid] == XPTR_NULL ) |
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261 | { |
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262 | found = true; |
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263 | break; |
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264 | } |
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265 | } |
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266 | |
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267 | if( found ) |
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268 | { |
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269 | // register process in pref_tbl[] |
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270 | pm->pref_tbl[lpid] = XPTR( local_cxy , process ); |
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271 | pm->pref_nr++; |
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272 | |
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273 | // returns pid |
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274 | *pid = PID( local_cxy , lpid ); |
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275 | |
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276 | // release the processs_manager lock |
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277 | spinlock_unlock( &pm->pref_lock ); |
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278 | |
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279 | return 0; |
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280 | } |
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281 | else |
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282 | { |
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283 | // release the processs_manager lock |
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284 | spinlock_unlock( &pm->pref_lock ); |
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285 | |
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286 | return -1; |
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287 | } |
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288 | |
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289 | } // end cluster_pid_alloc() |
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290 | |
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291 | ///////////////////////////////////// |
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292 | void cluster_pid_release( pid_t pid ) |
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293 | { |
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294 | cxy_t owner_cxy = CXY_FROM_PID( pid ); |
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295 | lpid_t lpid = LPID_FROM_PID( pid ); |
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296 | |
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297 | pmgr_t * pm = &LOCAL_CLUSTER->pmgr; |
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298 | |
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299 | // check pid argument |
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300 | assert( (lpid < CONFIG_MAX_PROCESS_PER_CLUSTER) && (owner_cxy == local_cxy) , |
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301 | __FUNCTION__ , "illegal PID" ); |
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302 | |
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303 | // get the process manager lock |
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304 | spinlock_lock( &pm->pref_lock ); |
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305 | |
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306 | // remove process from pref_tbl[] |
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307 | pm->pref_tbl[lpid] = XPTR_NULL; |
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308 | pm->pref_nr--; |
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309 | |
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310 | // release the processs_manager lock |
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311 | spinlock_unlock( &pm->pref_lock ); |
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312 | |
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313 | } // end cluster_pid_release() |
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314 | |
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315 | /////////////////////////////////////////////////////////// |
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316 | process_t * cluster_get_local_process_from_pid( pid_t pid ) |
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317 | { |
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318 | xptr_t process_xp; |
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319 | process_t * process_ptr; |
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320 | xptr_t root_xp; |
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321 | xptr_t iter_xp; |
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322 | bool_t found; |
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323 | |
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324 | found = false; |
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325 | root_xp = XPTR( local_cxy , &LOCAL_CLUSTER->pmgr.local_root ); |
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326 | |
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327 | XLIST_FOREACH( root_xp , iter_xp ) |
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328 | { |
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329 | process_xp = XLIST_ELEMENT( iter_xp , process_t , local_list ); |
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330 | process_ptr = (process_t *)GET_PTR( process_xp ); |
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331 | if( process_ptr->pid == pid ) |
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332 | { |
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333 | found = true; |
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334 | break; |
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335 | } |
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336 | } |
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337 | |
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338 | if (found ) return process_ptr; |
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339 | else return NULL; |
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340 | |
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341 | } // end cluster_get_local_process_from_pid() |
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342 | |
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343 | ////////////////////////////////////////////////////// |
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344 | void cluster_process_local_link( process_t * process ) |
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345 | { |
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346 | uint32_t irq_state; |
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347 | pmgr_t * pm = &LOCAL_CLUSTER->pmgr; |
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348 | |
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349 | // get lock protecting the process manager local list |
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350 | remote_spinlock_lock_busy( XPTR( local_cxy , &pm->local_lock ) , & irq_state ); |
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351 | |
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352 | xlist_add_last( XPTR( local_cxy , &pm->local_root ), |
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353 | XPTR( local_cxy , &process->local_list ) ); |
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354 | pm->local_nr++; |
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355 | |
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356 | // release lock protecting the process manager local list |
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357 | remote_spinlock_unlock_busy( XPTR( local_cxy , &pm->local_lock ) , irq_state ); |
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358 | } |
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359 | |
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360 | //////////////////////////////////////////////////////// |
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361 | void cluster_process_local_unlink( process_t * process ) |
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362 | { |
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363 | uint32_t irq_state; |
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364 | pmgr_t * pm = &LOCAL_CLUSTER->pmgr; |
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365 | |
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366 | // get lock protecting the process manager local list |
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367 | remote_spinlock_lock_busy( XPTR( local_cxy , &pm->local_lock ) , &irq_state ); |
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368 | |
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369 | xlist_unlink( XPTR( local_cxy , &process->local_list ) ); |
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370 | pm->local_nr--; |
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371 | |
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372 | // release lock protecting the process manager local list |
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373 | remote_spinlock_unlock_busy( XPTR( local_cxy , &pm->local_lock ) , irq_state ); |
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374 | } |
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375 | |
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376 | /////////////////////////////////////////////////////// |
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377 | void cluster_process_copies_link( process_t * process ) |
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378 | { |
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379 | uint32_t irq_state; |
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380 | pmgr_t * pm = &LOCAL_CLUSTER->pmgr; |
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381 | |
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382 | // get owner cluster identifier CXY and process LPID |
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383 | pid_t pid = process->pid; |
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384 | cxy_t owner_cxy = CXY_FROM_PID( pid ); |
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385 | lpid_t lpid = LPID_FROM_PID( pid ); |
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386 | |
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387 | // get extended pointer on lock protecting copies_list[lpid] |
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388 | xptr_t copies_lock = XPTR( owner_cxy , &pm->copies_lock[lpid] ); |
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389 | |
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390 | // get extended pointer on the copies_list[lpid] root |
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391 | xptr_t copies_root = XPTR( owner_cxy , &pm->copies_root[lpid] ); |
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392 | |
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393 | // get extended pointer on the local copies_list entry |
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394 | xptr_t copies_entry = XPTR( local_cxy , &process->copies_list ); |
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395 | |
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396 | // get lock protecting copies_list[lpid] |
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397 | remote_spinlock_lock_busy( copies_lock , &irq_state ); |
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398 | |
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399 | xlist_add_first( copies_root , copies_entry ); |
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400 | hal_remote_atomic_add( XPTR( owner_cxy , &pm->copies_nr[lpid] ) , 1 ); |
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401 | |
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402 | // release lock protecting copies_list[lpid] |
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403 | remote_spinlock_unlock_busy( copies_lock , irq_state ); |
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404 | } |
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405 | |
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406 | ///////////////////////////////////////////////////////// |
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407 | void cluster_process_copies_unlink( process_t * process ) |
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408 | { |
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409 | uint32_t irq_state; |
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410 | pmgr_t * pm = &LOCAL_CLUSTER->pmgr; |
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411 | |
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412 | // get owner cluster identifier CXY and process LPID |
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413 | pid_t pid = process->pid; |
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414 | cxy_t owner_cxy = CXY_FROM_PID( pid ); |
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415 | lpid_t lpid = LPID_FROM_PID( pid ); |
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416 | |
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417 | // get extended pointer on lock protecting copies_list[lpid] |
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418 | xptr_t copies_lock = hal_remote_lwd( XPTR( owner_cxy , &pm->copies_lock[lpid] ) ); |
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419 | |
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420 | // get extended pointer on the local copies_list entry |
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421 | xptr_t copies_entry = XPTR( local_cxy , &process->copies_list ); |
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422 | |
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423 | // get lock protecting copies_list[lpid] |
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424 | remote_spinlock_lock_busy( copies_lock , &irq_state ); |
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425 | |
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426 | xlist_unlink( copies_entry ); |
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427 | hal_remote_atomic_add( XPTR( owner_cxy , &pm->copies_nr[lpid] ) , -1 ); |
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428 | |
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429 | // release lock protecting copies_list[lpid] |
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430 | remote_spinlock_unlock_busy( copies_lock , irq_state ); |
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431 | } |
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432 | |
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433 | /////////////////////////////////////////// |
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434 | void cluster_processes_display( cxy_t cxy ) |
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435 | { |
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436 | xptr_t root_xp; |
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437 | xptr_t iter_xp; |
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438 | xptr_t process_xp; |
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439 | |
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440 | // get extended pointer on root of process in cluster cxy |
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441 | root_xp = XPTR( cxy , &LOCAL_CLUSTER->pmgr.local_root ); |
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442 | |
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443 | // skip one line |
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444 | printk("\n"); |
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445 | |
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446 | // loop on all reference processes in cluster cxy |
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447 | XLIST_FOREACH( root_xp , iter_xp ) |
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448 | { |
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449 | process_xp = XLIST_ELEMENT( iter_xp , process_t , local_list ); |
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450 | process_display( process_xp ); |
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451 | } |
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452 | } // end cluster_processes_display() |
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453 | |
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454 | |
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