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221 | giacomo | 1 | //===================================================================== |
2 | // FFFFFFIII RRRRR SSTTTTTTT |
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3 | // FF IIR RR SS |
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4 | // FF IR SS |
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5 | // FFFFFF RRRR SSSSST |
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6 | // FF FI RRR SS |
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7 | // FF II RRR SS |
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8 | // FF IIIIIR RS |
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9 | // |
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10 | // Basic FSF(FIRST Scheduling Framework) contract management |
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11 | // S.Ha.R.K. Implementation |
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12 | //===================================================================== |
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13 | |||
14 | #include "fsf_contract.h" |
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241 | giacomo | 15 | #include "fsf_server.h" |
221 | giacomo | 16 | |
17 | #include <pthread.h> |
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18 | #include <stdlib.h> |
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19 | |||
224 | giacomo | 20 | //#define FSF_DEBUG |
221 | giacomo | 21 | |
241 | giacomo | 22 | int fsf_server_level; |
221 | giacomo | 23 | |
241 | giacomo | 24 | int FSF_register_module(int server_level) |
224 | giacomo | 25 | { |
26 | |||
27 | printk("FSF Module\n"); |
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28 | |||
241 | giacomo | 29 | fsf_server_level = server_level; |
224 | giacomo | 30 | |
31 | return 0; |
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32 | |||
33 | } |
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34 | |||
221 | giacomo | 35 | /* Convert the contract specification to |
36 | * budget parameters |
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37 | */ |
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241 | giacomo | 38 | int set_SERVER_budget_from_contract |
221 | giacomo | 39 | (const fsf_contract_parameters_t *contract, |
40 | int *budget) |
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41 | { |
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42 | |||
43 | int local_scheduler_level = 0; |
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44 | |||
45 | switch (contract->local_scheduler_id) { |
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46 | case FSF_SCHEDULER_POSIX: |
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241 | giacomo | 47 | local_scheduler_level = POSIXSTAR_register_level(fsf_server_level,5000,32); |
221 | giacomo | 48 | break; |
49 | case FSF_SCHEDULER_EDF: |
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241 | giacomo | 50 | local_scheduler_level = EDFSTAR_register_level(fsf_server_level); |
221 | giacomo | 51 | break; |
52 | case FSF_SCHEDULER_RM: |
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241 | giacomo | 53 | local_scheduler_level = RMSTAR_register_level(fsf_server_level); |
221 | giacomo | 54 | break; |
55 | } |
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56 | |||
241 | giacomo | 57 | *budget = SERVER_setbudget(fsf_server_level, |
221 | giacomo | 58 | TIMESPEC2USEC(&(contract->budget_min)), |
59 | TIMESPEC2USEC(&(contract->period_max)), |
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60 | local_scheduler_level,contract->local_scheduler_id); |
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61 | |||
62 | return 0; |
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63 | |||
64 | } |
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65 | |||
241 | giacomo | 66 | int adjust_SERVER_budget_from_contract |
221 | giacomo | 67 | (const fsf_contract_parameters_t *contract, |
68 | int budget) |
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69 | { |
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70 | |||
241 | giacomo | 71 | SERVER_adjust_budget(fsf_server_level, |
72 | TIMESPEC2USEC(&(contract->budget_min)), |
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73 | TIMESPEC2USEC(&(contract->period_max)), |
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74 | budget); |
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221 | giacomo | 75 | |
76 | return 0; |
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77 | |||
78 | } |
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79 | |||
80 | /* Admission Test function */ |
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81 | int add_contract(const fsf_contract_parameters_t *contract) |
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82 | { |
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83 | |||
84 | return 0; |
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85 | |||
86 | } |
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87 | |||
88 | int link_contract_to_server(const fsf_contract_parameters_t *contract, |
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89 | fsf_server_id_t server) |
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90 | { |
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91 | |||
92 | return 0; |
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93 | |||
94 | } |
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95 | |||
96 | int remove_contract(fsf_server_id_t server) |
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97 | { |
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98 | |||
99 | return 0; |
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100 | |||
101 | } |
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102 | |||
103 | |||
104 | int fsf_negotiate_contract |
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105 | (const fsf_contract_parameters_t *contract, |
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106 | fsf_server_id_t *server) |
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107 | { |
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108 | |||
109 | /* Check if contract is initialized */ |
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110 | if (!contract) return FSF_ERR_NOT_INITIALIZED; |
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111 | |||
112 | /* Admission Test */ |
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113 | if (FSF_ADMISSION_TEST_IS_ENABLED) |
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114 | if (add_contract(contract)) |
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115 | return FSF_ERR_CONTRACT_REJECTED; |
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116 | |||
241 | giacomo | 117 | /* SERVER => BUDGET */ |
118 | set_SERVER_budget_from_contract(contract,server); |
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221 | giacomo | 119 | |
120 | #ifdef FSF_DEBUG |
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121 | kern_printf("(New Server %d)",*server); |
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122 | #endif |
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123 | |||
124 | if (*server >= 0) |
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125 | link_contract_to_server(contract,*server); |
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126 | else |
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127 | return FSF_ERR_CREATE_SERVER; |
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128 | |||
129 | return 0; |
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130 | |||
131 | } |
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132 | |||
241 | giacomo | 133 | int fsf_create_thread |
134 | (fsf_server_id_t server, |
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135 | pthread_t *thread, |
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136 | pthread_attr_t *attr, |
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137 | fsf_thread_code_t thread_code, |
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138 | void *arg, |
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139 | void *local_scheduler_arg) |
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221 | giacomo | 140 | { |
141 | |||
241 | giacomo | 142 | NRT_TASK_MODEL nrt; |
221 | giacomo | 143 | int local_scheduler_level,scheduler_id; |
144 | |||
145 | /* Move thread from the posix module to local scheduler */ |
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146 | |||
147 | #ifdef FSF_DEBUG |
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241 | giacomo | 148 | kern_printf("(FSF:Insert thread = %d to Server = %d)",thread,server); |
221 | giacomo | 149 | #endif |
150 | |||
151 | /* Check if server and thread exsist */ |
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241 | giacomo | 152 | if (server == NIL) |
153 | return FSF_ERR_INVALID_SERVER; |
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221 | giacomo | 154 | |
241 | giacomo | 155 | local_scheduler_level = SERVER_get_local_scheduler_level_from_budget(fsf_server_level,server); |
156 | scheduler_id = SERVER_get_local_scheduler_id_from_budget(fsf_server_level,server); |
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221 | giacomo | 157 | |
158 | /* Check if thread is already bind */ |
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159 | switch (scheduler_id) { |
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160 | case FSF_SCHEDULER_POSIX: |
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161 | |||
241 | giacomo | 162 | nrt_task_default_model(nrt); |
163 | nrt_task_def_save_arrivals(nrt); |
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164 | nrt_task_def_arg(nrt,arg); |
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165 | nrt_task_def_ctrl_jet(nrt); |
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166 | nrt_task_def_level(nrt,local_scheduler_level); |
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221 | giacomo | 167 | |
241 | giacomo | 168 | *thread = task_create("POSIXSTAR", thread_code, &nrt, NULL); |
169 | if (*thread == NIL) |
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170 | return FSF_ERR_CREATE_THREAD; |
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221 | giacomo | 171 | |
241 | giacomo | 172 | POSIXSTAR_setbudget(local_scheduler_level, *thread, (int)(server)); |
234 | giacomo | 173 | |
241 | giacomo | 174 | task_activate(*thread); |
221 | giacomo | 175 | |
176 | break; |
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177 | case FSF_SCHEDULER_EDF: |
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178 | |||
179 | break; |
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235 | giacomo | 180 | |
221 | giacomo | 181 | case FSF_SCHEDULER_RM: |
235 | giacomo | 182 | |
221 | giacomo | 183 | default: |
241 | giacomo | 184 | return FSF_ERR_INVALID_SERVER; |
221 | giacomo | 185 | break; |
186 | } |
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187 | |||
188 | return 0; |
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189 | |||
190 | } |
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191 | |||
192 | int fsf_get_server |
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193 | (fsf_server_id_t *server, |
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194 | pthread_t thread) |
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195 | { |
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196 | int local_scheduler_level, scheduler_id; |
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197 | |||
241 | giacomo | 198 | local_scheduler_level = SERVER_get_local_scheduler_level_from_pid(fsf_server_level,thread); |
199 | scheduler_id = SERVER_get_local_scheduler_id_from_pid(fsf_server_level, thread); |
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221 | giacomo | 200 | |
201 | switch (scheduler_id) { |
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202 | case FSF_SCHEDULER_POSIX: |
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203 | return POSIXSTAR_getbudget(local_scheduler_level,thread); |
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204 | case FSF_SCHEDULER_EDF: |
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235 | giacomo | 205 | return EDFSTAR_getbudget(local_scheduler_level,thread); |
221 | giacomo | 206 | case FSF_SCHEDULER_RM: |
235 | giacomo | 207 | return RMSTAR_getbudget(local_scheduler_level,thread); |
208 | default: |
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221 | giacomo | 209 | return -1; |
210 | } |
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211 | |||
212 | return -1; |
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213 | |||
214 | } |
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215 | |||
216 | int fsf_cancel_contract |
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217 | (fsf_server_id_t *server) |
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218 | { |
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219 | |||
220 | int local_scheduler_level, scheduler_id; |
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221 | |||
222 | #ifdef FSF_DEBUG |
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223 | kern_printf("(Remove server %d)",*server); |
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224 | #endif |
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225 | |||
226 | /* Check server id */ |
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227 | if (*server < 0) |
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228 | return FSF_ERR_INVALID_SERVER; |
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229 | |||
241 | giacomo | 230 | local_scheduler_level = SERVER_get_local_scheduler_level_from_budget(fsf_server_level,*server); |
231 | scheduler_id = SERVER_get_local_scheduler_id_from_budget(fsf_server_level,*server); |
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221 | giacomo | 232 | |
233 | switch (scheduler_id) { |
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234 | case FSF_SCHEDULER_POSIX: |
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235 | |||
236 | /* Check if some thread use the server */ |
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237 | if(POSIXSTAR_budget_has_thread(local_scheduler_level,*server)) |
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238 | return FSF_ERR_SERVER_USED; |
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239 | |||
240 | break; |
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241 | case FSF_SCHEDULER_EDF: |
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235 | giacomo | 242 | /* Check if some thread use the server */ |
243 | if(EDFSTAR_budget_has_thread(local_scheduler_level,*server)) |
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244 | return FSF_ERR_SERVER_USED; |
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245 | break; |
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246 | |||
221 | giacomo | 247 | case FSF_SCHEDULER_RM: |
235 | giacomo | 248 | /* Check if some thread use the server */ |
249 | if(RMSTAR_budget_has_thread(local_scheduler_level,*server)) |
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250 | return FSF_ERR_SERVER_USED; |
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251 | |||
221 | giacomo | 252 | break; |
253 | } |
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254 | |||
241 | giacomo | 255 | SERVER_removebudget(fsf_server_level,*server); |
221 | giacomo | 256 | |
257 | level_free_descriptor(local_scheduler_level); |
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258 | |||
259 | remove_contract(*server); |
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260 | |||
261 | *server = -1; |
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262 | |||
263 | return 0; |
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264 | |||
265 | } |
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266 | |||
267 | int fsf_renegotiate_contract |
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268 | (const fsf_contract_parameters_t *new_contract, |
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269 | fsf_server_id_t server) |
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270 | { |
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271 | |||
272 | #ifdef FSF_DEBUG |
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273 | kern_printf("(Renegotiate for server %d)",server); |
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274 | #endif |
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275 | |||
276 | if (!new_contract) |
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277 | return FSF_ERR_NOT_INITIALIZED; |
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278 | |||
279 | if (server < 0) |
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280 | return FSF_ERR_INVALID_SERVER; |
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281 | |||
241 | giacomo | 282 | return adjust_SERVER_budget_from_contract(new_contract,server); |
221 | giacomo | 283 | |
284 | } |
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241 | giacomo | 285 |