Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * (C)Copyright 1998,1999 SysKonnect, |
| 4 | * a business unit of Schneider & Koch & Co. Datensysteme GmbH. |
| 5 | * |
| 6 | * See the file "skfddi.c" for further information. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * The information in this file is provided "AS IS" without warranty. |
| 14 | * |
| 15 | ******************************************************************************/ |
| 16 | |
| 17 | /* |
| 18 | * ******************************************************************* |
| 19 | * This SBA code implements the Synchronous Bandwidth Allocation |
| 20 | * functions described in the "FDDI Synchronous Forum Implementer's |
| 21 | * Agreement" dated December 1th, 1993. |
| 22 | * ******************************************************************* |
| 23 | * |
| 24 | * PURPOSE: The purpose of this function is to control |
| 25 | * synchronous allocations on a single FDDI segment. |
| 26 | * Allocations are limited to the primary FDDI ring. |
| 27 | * The SBM provides recovery mechanisms to recover |
| 28 | * unused bandwidth also resolves T_Neg and |
| 29 | * reconfiguration changes. Many of the SBM state |
| 30 | * machine inputs are sourced by the underlying |
| 31 | * FDDI sub-system supporting the SBA application. |
| 32 | * |
| 33 | * ******************************************************************* |
| 34 | */ |
| 35 | |
| 36 | #include "h/types.h" |
| 37 | #include "h/fddi.h" |
| 38 | #include "h/smc.h" |
| 39 | #include "h/smt_p.h" |
| 40 | |
| 41 | |
| 42 | #ifndef SLIM_SMT |
| 43 | |
| 44 | #ifdef ESS |
| 45 | |
| 46 | #ifndef lint |
| 47 | static const char ID_sccs[] = "@(#)ess.c 1.10 96/02/23 (C) SK" ; |
| 48 | #define LINT_USE(x) |
| 49 | #else |
| 50 | #define LINT_USE(x) (x)=(x) |
| 51 | #endif |
| 52 | #define MS2BCLK(x) ((x)*12500L) |
| 53 | |
| 54 | /* |
| 55 | ------------------------------------------------------------- |
| 56 | LOCAL VARIABLES: |
| 57 | ------------------------------------------------------------- |
| 58 | */ |
| 59 | |
| 60 | static const u_short plist_raf_alc_res[] = { SMT_P0012, SMT_P320B, SMT_P320F, |
| 61 | SMT_P3210, SMT_P0019, SMT_P001A, |
| 62 | SMT_P001D, 0 } ; |
| 63 | |
| 64 | static const u_short plist_raf_chg_req[] = { SMT_P320B, SMT_P320F, SMT_P3210, |
| 65 | SMT_P001A, 0 } ; |
| 66 | |
| 67 | static const struct fddi_addr smt_sba_da = {{0x80,0x01,0x43,0x00,0x80,0x0C}} ; |
| 68 | static const struct fddi_addr null_addr = {{0,0,0,0,0,0}} ; |
| 69 | |
| 70 | /* |
| 71 | ------------------------------------------------------------- |
| 72 | GLOBAL VARIABLES: |
| 73 | ------------------------------------------------------------- |
| 74 | */ |
| 75 | |
| 76 | |
| 77 | /* |
| 78 | ------------------------------------------------------------- |
| 79 | LOCAL FUNCTIONS: |
| 80 | ------------------------------------------------------------- |
| 81 | */ |
| 82 | |
| 83 | static void ess_send_response(struct s_smc *smc, struct smt_header *sm, |
| 84 | int sba_cmd); |
| 85 | static void ess_config_fifo(struct s_smc *smc); |
| 86 | static void ess_send_alc_req(struct s_smc *smc); |
| 87 | static void ess_send_frame(struct s_smc *smc, SMbuf *mb); |
| 88 | |
| 89 | /* |
| 90 | ------------------------------------------------------------- |
| 91 | EXTERNAL FUNCTIONS: |
| 92 | ------------------------------------------------------------- |
| 93 | */ |
| 94 | |
| 95 | /* |
| 96 | ------------------------------------------------------------- |
| 97 | PUBLIC FUNCTIONS: |
| 98 | ------------------------------------------------------------- |
| 99 | */ |
| 100 | |
| 101 | void ess_timer_poll(struct s_smc *smc); |
| 102 | void ess_para_change(struct s_smc *smc); |
| 103 | int ess_raf_received_pack(struct s_smc *smc, SMbuf *mb, struct smt_header *sm, |
| 104 | int fs); |
Adrian Bunk | 7aa55fc | 2005-06-21 01:47:06 -0700 | [diff] [blame] | 105 | static int process_bw_alloc(struct s_smc *smc, long int payload, long int overhead); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | |
| 107 | |
| 108 | /* |
| 109 | * -------------------------------------------------------------------------- |
| 110 | * End Station Support (ESS) |
| 111 | * -------------------------------------------------------------------------- |
| 112 | */ |
| 113 | |
| 114 | /* |
| 115 | * evaluate the RAF frame |
| 116 | */ |
| 117 | int ess_raf_received_pack(struct s_smc *smc, SMbuf *mb, struct smt_header *sm, |
| 118 | int fs) |
| 119 | { |
| 120 | void *p ; /* universal pointer */ |
| 121 | struct smt_p_0016 *cmd ; /* para: command for the ESS */ |
| 122 | SMbuf *db ; |
| 123 | u_long msg_res_type ; /* recource type */ |
| 124 | u_long payload, overhead ; |
| 125 | int local ; |
| 126 | int i ; |
| 127 | |
| 128 | /* |
| 129 | * Message Processing Code |
| 130 | */ |
| 131 | local = ((fs & L_INDICATOR) != 0) ; |
| 132 | |
| 133 | /* |
| 134 | * get the resource type |
| 135 | */ |
| 136 | if (!(p = (void *) sm_to_para(smc,sm,SMT_P0015))) { |
| 137 | DB_ESS("ESS: RAF frame error, parameter type not found\n",0,0) ; |
Eric Dumazet | 807540b | 2010-09-23 05:40:09 +0000 | [diff] [blame] | 138 | return fs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | } |
| 140 | msg_res_type = ((struct smt_p_0015 *)p)->res_type ; |
| 141 | |
| 142 | /* |
| 143 | * get the pointer to the ESS command |
| 144 | */ |
| 145 | if (!(cmd = (struct smt_p_0016 *) sm_to_para(smc,sm,SMT_P0016))) { |
| 146 | /* |
| 147 | * error in frame: para ESS command was not found |
| 148 | */ |
| 149 | DB_ESS("ESS: RAF frame error, parameter command not found\n",0,0); |
Eric Dumazet | 807540b | 2010-09-23 05:40:09 +0000 | [diff] [blame] | 150 | return fs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | } |
| 152 | |
| 153 | DB_ESSN(2,"fc %x ft %x\n",sm->smt_class,sm->smt_type) ; |
| 154 | DB_ESSN(2,"ver %x tran %lx\n",sm->smt_version,sm->smt_tid) ; |
| 155 | DB_ESSN(2,"stn_id %s\n",addr_to_string(&sm->smt_source),0) ; |
| 156 | |
| 157 | DB_ESSN(2,"infolen %x res %x\n",sm->smt_len, msg_res_type) ; |
| 158 | DB_ESSN(2,"sbacmd %x\n",cmd->sba_cmd,0) ; |
| 159 | |
| 160 | /* |
| 161 | * evaluate the ESS command |
| 162 | */ |
| 163 | switch (cmd->sba_cmd) { |
| 164 | |
| 165 | /* |
| 166 | * Process an ESS Allocation Request |
| 167 | */ |
| 168 | case REQUEST_ALLOCATION : |
| 169 | /* |
| 170 | * check for an RAF Request (Allocation Request) |
| 171 | */ |
| 172 | if (sm->smt_type == SMT_REQUEST) { |
| 173 | /* |
| 174 | * process the Allocation request only if the frame is |
| 175 | * local and no static allocation is used |
| 176 | */ |
| 177 | if (!local || smc->mib.fddiESSPayload) |
Eric Dumazet | 807540b | 2010-09-23 05:40:09 +0000 | [diff] [blame] | 178 | return fs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | |
| 180 | p = (void *) sm_to_para(smc,sm,SMT_P0019) ; |
| 181 | for (i = 0; i < 5; i++) { |
| 182 | if (((struct smt_p_0019 *)p)->alloc_addr.a[i]) { |
Eric Dumazet | 807540b | 2010-09-23 05:40:09 +0000 | [diff] [blame] | 183 | return fs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | } |
| 185 | } |
| 186 | |
| 187 | /* |
| 188 | * Note: The Application should send a LAN_LOC_FRAME. |
| 189 | * The ESS do not send the Frame to the network! |
| 190 | */ |
| 191 | smc->ess.alloc_trans_id = sm->smt_tid ; |
| 192 | DB_ESS("ESS: save Alloc Req Trans ID %lx\n",sm->smt_tid,0); |
| 193 | p = (void *) sm_to_para(smc,sm,SMT_P320F) ; |
| 194 | ((struct smt_p_320f *)p)->mib_payload = |
| 195 | smc->mib.a[PATH0].fddiPATHSbaPayload ; |
| 196 | p = (void *) sm_to_para(smc,sm,SMT_P3210) ; |
| 197 | ((struct smt_p_3210 *)p)->mib_overhead = |
| 198 | smc->mib.a[PATH0].fddiPATHSbaOverhead ; |
| 199 | sm->smt_dest = smt_sba_da ; |
| 200 | |
| 201 | if (smc->ess.local_sba_active) |
Eric Dumazet | 807540b | 2010-09-23 05:40:09 +0000 | [diff] [blame] | 202 | return fs | I_INDICATOR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | |
| 204 | if (!(db = smt_get_mbuf(smc))) |
Eric Dumazet | 807540b | 2010-09-23 05:40:09 +0000 | [diff] [blame] | 205 | return fs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | |
| 207 | db->sm_len = mb->sm_len ; |
| 208 | db->sm_off = mb->sm_off ; |
| 209 | memcpy(((char *)(db->sm_data+db->sm_off)),(char *)sm, |
| 210 | (int)db->sm_len) ; |
| 211 | dump_smt(smc, |
| 212 | (struct smt_header *)(db->sm_data+db->sm_off), |
| 213 | "RAF") ; |
| 214 | smt_send_frame(smc,db,FC_SMT_INFO,0) ; |
Eric Dumazet | 807540b | 2010-09-23 05:40:09 +0000 | [diff] [blame] | 215 | return fs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | } |
| 217 | |
| 218 | /* |
| 219 | * The RAF frame is an Allocation Response ! |
| 220 | * check the parameters |
| 221 | */ |
| 222 | if (smt_check_para(smc,sm,plist_raf_alc_res)) { |
| 223 | DB_ESS("ESS: RAF with para problem, ignoring\n",0,0) ; |
Eric Dumazet | 807540b | 2010-09-23 05:40:09 +0000 | [diff] [blame] | 224 | return fs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | } |
| 226 | |
| 227 | /* |
| 228 | * VERIFY THE FRAME IS WELL BUILT: |
| 229 | * |
| 230 | * 1. path index = primary ring only |
| 231 | * 2. resource type = sync bw only |
| 232 | * 3. trans action id = alloc_trans_id |
| 233 | * 4. reason code = success |
| 234 | * |
| 235 | * If any are violated, discard the RAF frame |
| 236 | */ |
| 237 | if ((((struct smt_p_320b *)sm_to_para(smc,sm,SMT_P320B))->path_index |
| 238 | != PRIMARY_RING) || |
| 239 | (msg_res_type != SYNC_BW) || |
| 240 | (((struct smt_p_reason *)sm_to_para(smc,sm,SMT_P0012))->rdf_reason |
| 241 | != SMT_RDF_SUCCESS) || |
| 242 | (sm->smt_tid != smc->ess.alloc_trans_id)) { |
| 243 | |
| 244 | DB_ESS("ESS: Allocation Responce not accepted\n",0,0) ; |
Eric Dumazet | 807540b | 2010-09-23 05:40:09 +0000 | [diff] [blame] | 245 | return fs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | } |
| 247 | |
| 248 | /* |
| 249 | * Extract message parameters |
| 250 | */ |
| 251 | p = (void *) sm_to_para(smc,sm,SMT_P320F) ; |
| 252 | if (!p) { |
| 253 | printk(KERN_ERR "ESS: sm_to_para failed"); |
| 254 | return fs; |
| 255 | } |
| 256 | payload = ((struct smt_p_320f *)p)->mib_payload ; |
| 257 | p = (void *) sm_to_para(smc,sm,SMT_P3210) ; |
| 258 | if (!p) { |
| 259 | printk(KERN_ERR "ESS: sm_to_para failed"); |
| 260 | return fs; |
| 261 | } |
| 262 | overhead = ((struct smt_p_3210 *)p)->mib_overhead ; |
| 263 | |
| 264 | DB_ESSN(2,"payload= %lx overhead= %lx\n",payload,overhead) ; |
| 265 | |
| 266 | /* |
| 267 | * process the bandwidth allocation |
| 268 | */ |
| 269 | (void)process_bw_alloc(smc,(long)payload,(long)overhead) ; |
| 270 | |
Eric Dumazet | 807540b | 2010-09-23 05:40:09 +0000 | [diff] [blame] | 271 | return fs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | /* end of Process Allocation Request */ |
| 273 | |
| 274 | /* |
| 275 | * Process an ESS Change Request |
| 276 | */ |
| 277 | case CHANGE_ALLOCATION : |
| 278 | /* |
| 279 | * except only replies |
| 280 | */ |
| 281 | if (sm->smt_type != SMT_REQUEST) { |
| 282 | DB_ESS("ESS: Do not process Change Responses\n",0,0) ; |
Eric Dumazet | 807540b | 2010-09-23 05:40:09 +0000 | [diff] [blame] | 283 | return fs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | } |
| 285 | |
| 286 | /* |
| 287 | * check the para for the Change Request |
| 288 | */ |
| 289 | if (smt_check_para(smc,sm,plist_raf_chg_req)) { |
| 290 | DB_ESS("ESS: RAF with para problem, ignoring\n",0,0) ; |
Eric Dumazet | 807540b | 2010-09-23 05:40:09 +0000 | [diff] [blame] | 291 | return fs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | } |
| 293 | |
| 294 | /* |
| 295 | * Verify the path index and resource |
| 296 | * type are correct. If any of |
| 297 | * these are false, don't process this |
| 298 | * change request frame. |
| 299 | */ |
| 300 | if ((((struct smt_p_320b *)sm_to_para(smc,sm,SMT_P320B))->path_index |
| 301 | != PRIMARY_RING) || (msg_res_type != SYNC_BW)) { |
| 302 | DB_ESS("ESS: RAF frame with para problem, ignoring\n",0,0) ; |
Eric Dumazet | 807540b | 2010-09-23 05:40:09 +0000 | [diff] [blame] | 303 | return fs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | } |
| 305 | |
| 306 | /* |
| 307 | * Extract message queue parameters |
| 308 | */ |
| 309 | p = (void *) sm_to_para(smc,sm,SMT_P320F) ; |
| 310 | payload = ((struct smt_p_320f *)p)->mib_payload ; |
| 311 | p = (void *) sm_to_para(smc,sm,SMT_P3210) ; |
| 312 | overhead = ((struct smt_p_3210 *)p)->mib_overhead ; |
| 313 | |
| 314 | DB_ESSN(2,"ESS: Change Request from %s\n", |
| 315 | addr_to_string(&sm->smt_source),0) ; |
| 316 | DB_ESSN(2,"payload= %lx overhead= %lx\n",payload,overhead) ; |
| 317 | |
| 318 | /* |
| 319 | * process the bandwidth allocation |
| 320 | */ |
| 321 | if(!process_bw_alloc(smc,(long)payload,(long)overhead)) |
Eric Dumazet | 807540b | 2010-09-23 05:40:09 +0000 | [diff] [blame] | 322 | return fs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | |
| 324 | /* |
| 325 | * send an RAF Change Reply |
| 326 | */ |
| 327 | ess_send_response(smc,sm,CHANGE_ALLOCATION) ; |
| 328 | |
Eric Dumazet | 807540b | 2010-09-23 05:40:09 +0000 | [diff] [blame] | 329 | return fs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | /* end of Process Change Request */ |
| 331 | |
| 332 | /* |
| 333 | * Process Report Response |
| 334 | */ |
| 335 | case REPORT_ALLOCATION : |
| 336 | /* |
| 337 | * except only requests |
| 338 | */ |
| 339 | if (sm->smt_type != SMT_REQUEST) { |
| 340 | DB_ESS("ESS: Do not process a Report Reply\n",0,0) ; |
Eric Dumazet | 807540b | 2010-09-23 05:40:09 +0000 | [diff] [blame] | 341 | return fs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | } |
| 343 | |
| 344 | DB_ESSN(2,"ESS: Report Request from %s\n", |
| 345 | addr_to_string(&(sm->smt_source)),0) ; |
| 346 | |
| 347 | /* |
| 348 | * verify that the resource type is sync bw only |
| 349 | */ |
| 350 | if (msg_res_type != SYNC_BW) { |
| 351 | DB_ESS("ESS: ignoring RAF with para problem\n",0,0) ; |
Eric Dumazet | 807540b | 2010-09-23 05:40:09 +0000 | [diff] [blame] | 352 | return fs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | } |
| 354 | |
| 355 | /* |
| 356 | * send an RAF Change Reply |
| 357 | */ |
| 358 | ess_send_response(smc,sm,REPORT_ALLOCATION) ; |
| 359 | |
Eric Dumazet | 807540b | 2010-09-23 05:40:09 +0000 | [diff] [blame] | 360 | return fs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | /* end of Process Report Request */ |
| 362 | |
| 363 | default: |
| 364 | /* |
| 365 | * error in frame |
| 366 | */ |
| 367 | DB_ESS("ESS: ignoring RAF with bad sba_cmd\n",0,0) ; |
| 368 | break ; |
| 369 | } |
| 370 | |
Eric Dumazet | 807540b | 2010-09-23 05:40:09 +0000 | [diff] [blame] | 371 | return fs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | } |
| 373 | |
| 374 | /* |
| 375 | * determines the synchronous bandwidth, set the TSYNC register and the |
| 376 | * mib variables SBAPayload, SBAOverhead and fddiMACT-NEG. |
| 377 | */ |
Adrian Bunk | 7aa55fc | 2005-06-21 01:47:06 -0700 | [diff] [blame] | 378 | static int process_bw_alloc(struct s_smc *smc, long int payload, long int overhead) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | { |
| 380 | /* |
| 381 | * determine the synchronous bandwidth (sync_bw) in bytes per T-NEG, |
| 382 | * if the payload is greater than zero. |
| 383 | * For the SBAPayload and the SBAOverhead we have the following |
| 384 | * unite quations |
| 385 | * _ _ |
| 386 | * | bytes | |
| 387 | * SBAPayload = | 8000 ------ | |
| 388 | * | s | |
| 389 | * - - |
| 390 | * _ _ |
| 391 | * | bytes | |
| 392 | * SBAOverhead = | ------ | |
| 393 | * | T-NEG | |
| 394 | * - - |
| 395 | * |
| 396 | * T-NEG is discribed by the equation: |
| 397 | * |
| 398 | * (-) fddiMACT-NEG |
| 399 | * T-NEG = ------------------- |
| 400 | * 12500000 1/s |
| 401 | * |
| 402 | * The number of bytes we are able to send is the payload |
| 403 | * plus the overhead. |
| 404 | * |
| 405 | * bytes T-NEG SBAPayload 8000 bytes/s |
| 406 | * sync_bw = SBAOverhead ------ + ----------------------------- |
| 407 | * T-NEG T-NEG |
| 408 | * |
| 409 | * |
| 410 | * 1 |
| 411 | * sync_bw = SBAOverhead + ---- (-)fddiMACT-NEG * SBAPayload |
| 412 | * 1562 |
| 413 | * |
| 414 | */ |
| 415 | |
| 416 | /* |
| 417 | * set the mib attributes fddiPATHSbaOverhead, fddiPATHSbaPayload |
| 418 | */ |
| 419 | /* if (smt_set_obj(smc,SMT_P320F,payload,S_SET)) { |
| 420 | DB_ESS("ESS: SMT does not accept the payload value\n",0,0) ; |
Eric Dumazet | 807540b | 2010-09-23 05:40:09 +0000 | [diff] [blame] | 421 | return FALSE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | } |
| 423 | if (smt_set_obj(smc,SMT_P3210,overhead,S_SET)) { |
| 424 | DB_ESS("ESS: SMT does not accept the overhead value\n",0,0) ; |
Eric Dumazet | 807540b | 2010-09-23 05:40:09 +0000 | [diff] [blame] | 425 | return FALSE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | } */ |
| 427 | |
| 428 | /* premliminary */ |
| 429 | if (payload > MAX_PAYLOAD || overhead > 5000) { |
| 430 | DB_ESS("ESS: payload / overhead not accepted\n",0,0) ; |
Eric Dumazet | 807540b | 2010-09-23 05:40:09 +0000 | [diff] [blame] | 431 | return FALSE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | } |
| 433 | |
| 434 | /* |
| 435 | * start the iterative allocation process if the payload or the overhead |
| 436 | * are smaller than the parsed values |
| 437 | */ |
| 438 | if (smc->mib.fddiESSPayload && |
| 439 | ((u_long)payload != smc->mib.fddiESSPayload || |
| 440 | (u_long)overhead != smc->mib.fddiESSOverhead)) { |
| 441 | smc->ess.raf_act_timer_poll = TRUE ; |
| 442 | smc->ess.timer_count = 0 ; |
| 443 | } |
| 444 | |
| 445 | /* |
| 446 | * evulate the Payload |
| 447 | */ |
| 448 | if (payload) { |
| 449 | DB_ESSN(2,"ESS: turn SMT_ST_SYNC_SERVICE bit on\n",0,0) ; |
| 450 | smc->ess.sync_bw_available = TRUE ; |
| 451 | |
| 452 | smc->ess.sync_bw = overhead - |
| 453 | (long)smc->mib.m[MAC0].fddiMACT_Neg * |
| 454 | payload / 1562 ; |
| 455 | } |
| 456 | else { |
| 457 | DB_ESSN(2,"ESS: turn SMT_ST_SYNC_SERVICE bit off\n",0,0) ; |
| 458 | smc->ess.sync_bw_available = FALSE ; |
| 459 | smc->ess.sync_bw = 0 ; |
| 460 | overhead = 0 ; |
| 461 | } |
| 462 | |
| 463 | smc->mib.a[PATH0].fddiPATHSbaPayload = payload ; |
| 464 | smc->mib.a[PATH0].fddiPATHSbaOverhead = overhead ; |
| 465 | |
| 466 | |
| 467 | DB_ESSN(2,"tsync = %lx\n",smc->ess.sync_bw,0) ; |
| 468 | |
| 469 | ess_config_fifo(smc) ; |
| 470 | set_formac_tsync(smc,smc->ess.sync_bw) ; |
Eric Dumazet | 807540b | 2010-09-23 05:40:09 +0000 | [diff] [blame] | 471 | return TRUE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | } |
| 473 | |
| 474 | static void ess_send_response(struct s_smc *smc, struct smt_header *sm, |
| 475 | int sba_cmd) |
| 476 | { |
| 477 | struct smt_sba_chg *chg ; |
| 478 | SMbuf *mb ; |
| 479 | void *p ; |
| 480 | |
| 481 | /* |
| 482 | * get and initialize the responce frame |
| 483 | */ |
| 484 | if (sba_cmd == CHANGE_ALLOCATION) { |
| 485 | if (!(mb=smt_build_frame(smc,SMT_RAF,SMT_REPLY, |
| 486 | sizeof(struct smt_sba_chg)))) |
| 487 | return ; |
| 488 | } |
| 489 | else { |
| 490 | if (!(mb=smt_build_frame(smc,SMT_RAF,SMT_REPLY, |
| 491 | sizeof(struct smt_sba_rep_res)))) |
| 492 | return ; |
| 493 | } |
| 494 | |
| 495 | chg = smtod(mb,struct smt_sba_chg *) ; |
| 496 | chg->smt.smt_tid = sm->smt_tid ; |
| 497 | chg->smt.smt_dest = sm->smt_source ; |
| 498 | |
| 499 | /* set P15 */ |
| 500 | chg->s_type.para.p_type = SMT_P0015 ; |
| 501 | chg->s_type.para.p_len = sizeof(struct smt_p_0015) - PARA_LEN ; |
| 502 | chg->s_type.res_type = SYNC_BW ; |
| 503 | |
| 504 | /* set P16 */ |
| 505 | chg->cmd.para.p_type = SMT_P0016 ; |
| 506 | chg->cmd.para.p_len = sizeof(struct smt_p_0016) - PARA_LEN ; |
| 507 | chg->cmd.sba_cmd = sba_cmd ; |
| 508 | |
| 509 | /* set P320B */ |
| 510 | chg->path.para.p_type = SMT_P320B ; |
| 511 | chg->path.para.p_len = sizeof(struct smt_p_320b) - PARA_LEN ; |
| 512 | chg->path.mib_index = SBAPATHINDEX ; |
Takashi Iwai | c22ce6d | 2008-08-20 16:34:35 -0700 | [diff] [blame] | 513 | chg->path.path_pad = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | chg->path.path_index = PRIMARY_RING ; |
| 515 | |
| 516 | /* set P320F */ |
| 517 | chg->payload.para.p_type = SMT_P320F ; |
| 518 | chg->payload.para.p_len = sizeof(struct smt_p_320f) - PARA_LEN ; |
| 519 | chg->payload.mib_index = SBAPATHINDEX ; |
| 520 | chg->payload.mib_payload = smc->mib.a[PATH0].fddiPATHSbaPayload ; |
| 521 | |
| 522 | /* set P3210 */ |
| 523 | chg->overhead.para.p_type = SMT_P3210 ; |
| 524 | chg->overhead.para.p_len = sizeof(struct smt_p_3210) - PARA_LEN ; |
| 525 | chg->overhead.mib_index = SBAPATHINDEX ; |
| 526 | chg->overhead.mib_overhead = smc->mib.a[PATH0].fddiPATHSbaOverhead ; |
| 527 | |
| 528 | if (sba_cmd == CHANGE_ALLOCATION) { |
| 529 | /* set P1A */ |
| 530 | chg->cat.para.p_type = SMT_P001A ; |
| 531 | chg->cat.para.p_len = sizeof(struct smt_p_001a) - PARA_LEN ; |
| 532 | p = (void *) sm_to_para(smc,sm,SMT_P001A) ; |
| 533 | chg->cat.category = ((struct smt_p_001a *)p)->category ; |
| 534 | } |
| 535 | dump_smt(smc,(struct smt_header *)chg,"RAF") ; |
| 536 | ess_send_frame(smc,mb) ; |
| 537 | } |
| 538 | |
| 539 | void ess_timer_poll(struct s_smc *smc) |
| 540 | { |
| 541 | if (!smc->ess.raf_act_timer_poll) |
| 542 | return ; |
| 543 | |
| 544 | DB_ESSN(2,"ESS: timer_poll\n",0,0) ; |
| 545 | |
| 546 | smc->ess.timer_count++ ; |
| 547 | if (smc->ess.timer_count == 10) { |
| 548 | smc->ess.timer_count = 0 ; |
| 549 | ess_send_alc_req(smc) ; |
| 550 | } |
| 551 | } |
| 552 | |
| 553 | static void ess_send_alc_req(struct s_smc *smc) |
| 554 | { |
| 555 | struct smt_sba_alc_req *req ; |
| 556 | SMbuf *mb ; |
| 557 | |
| 558 | /* |
| 559 | * send never allocation request where the requested payload and |
Daniel Mack | 551e378 | 2010-01-28 16:11:51 +0800 | [diff] [blame] | 560 | * overhead is zero or deallocate bandwidth when no bandwidth is |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | * parsed |
| 562 | */ |
| 563 | if (!smc->mib.fddiESSPayload) { |
| 564 | smc->mib.fddiESSOverhead = 0 ; |
| 565 | } |
| 566 | else { |
| 567 | if (!smc->mib.fddiESSOverhead) |
| 568 | smc->mib.fddiESSOverhead = DEFAULT_OV ; |
| 569 | } |
| 570 | |
| 571 | if (smc->mib.fddiESSOverhead == |
| 572 | smc->mib.a[PATH0].fddiPATHSbaOverhead && |
| 573 | smc->mib.fddiESSPayload == |
| 574 | smc->mib.a[PATH0].fddiPATHSbaPayload){ |
| 575 | smc->ess.raf_act_timer_poll = FALSE ; |
| 576 | smc->ess.timer_count = 7 ; /* next RAF alc req after 3 s */ |
| 577 | return ; |
| 578 | } |
| 579 | |
| 580 | /* |
| 581 | * get and initialize the responce frame |
| 582 | */ |
| 583 | if (!(mb=smt_build_frame(smc,SMT_RAF,SMT_REQUEST, |
| 584 | sizeof(struct smt_sba_alc_req)))) |
| 585 | return ; |
| 586 | req = smtod(mb,struct smt_sba_alc_req *) ; |
| 587 | req->smt.smt_tid = smc->ess.alloc_trans_id = smt_get_tid(smc) ; |
| 588 | req->smt.smt_dest = smt_sba_da ; |
| 589 | |
| 590 | /* set P15 */ |
| 591 | req->s_type.para.p_type = SMT_P0015 ; |
| 592 | req->s_type.para.p_len = sizeof(struct smt_p_0015) - PARA_LEN ; |
| 593 | req->s_type.res_type = SYNC_BW ; |
| 594 | |
| 595 | /* set P16 */ |
| 596 | req->cmd.para.p_type = SMT_P0016 ; |
| 597 | req->cmd.para.p_len = sizeof(struct smt_p_0016) - PARA_LEN ; |
| 598 | req->cmd.sba_cmd = REQUEST_ALLOCATION ; |
| 599 | |
| 600 | /* |
Paulius Zaleckas | efad798b | 2008-02-03 15:42:53 +0200 | [diff] [blame] | 601 | * set the parameter type and parameter length of all used |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | * parameters |
| 603 | */ |
| 604 | |
| 605 | /* set P320B */ |
| 606 | req->path.para.p_type = SMT_P320B ; |
| 607 | req->path.para.p_len = sizeof(struct smt_p_320b) - PARA_LEN ; |
| 608 | req->path.mib_index = SBAPATHINDEX ; |
Takashi Iwai | c22ce6d | 2008-08-20 16:34:35 -0700 | [diff] [blame] | 609 | req->path.path_pad = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | req->path.path_index = PRIMARY_RING ; |
| 611 | |
| 612 | /* set P0017 */ |
| 613 | req->pl_req.para.p_type = SMT_P0017 ; |
| 614 | req->pl_req.para.p_len = sizeof(struct smt_p_0017) - PARA_LEN ; |
| 615 | req->pl_req.sba_pl_req = smc->mib.fddiESSPayload - |
| 616 | smc->mib.a[PATH0].fddiPATHSbaPayload ; |
| 617 | |
| 618 | /* set P0018 */ |
| 619 | req->ov_req.para.p_type = SMT_P0018 ; |
| 620 | req->ov_req.para.p_len = sizeof(struct smt_p_0018) - PARA_LEN ; |
| 621 | req->ov_req.sba_ov_req = smc->mib.fddiESSOverhead - |
| 622 | smc->mib.a[PATH0].fddiPATHSbaOverhead ; |
| 623 | |
| 624 | /* set P320F */ |
| 625 | req->payload.para.p_type = SMT_P320F ; |
| 626 | req->payload.para.p_len = sizeof(struct smt_p_320f) - PARA_LEN ; |
| 627 | req->payload.mib_index = SBAPATHINDEX ; |
| 628 | req->payload.mib_payload = smc->mib.a[PATH0].fddiPATHSbaPayload ; |
| 629 | |
| 630 | /* set P3210 */ |
| 631 | req->overhead.para.p_type = SMT_P3210 ; |
| 632 | req->overhead.para.p_len = sizeof(struct smt_p_3210) - PARA_LEN ; |
| 633 | req->overhead.mib_index = SBAPATHINDEX ; |
| 634 | req->overhead.mib_overhead = smc->mib.a[PATH0].fddiPATHSbaOverhead ; |
| 635 | |
| 636 | /* set P19 */ |
| 637 | req->a_addr.para.p_type = SMT_P0019 ; |
| 638 | req->a_addr.para.p_len = sizeof(struct smt_p_0019) - PARA_LEN ; |
Takashi Iwai | c22ce6d | 2008-08-20 16:34:35 -0700 | [diff] [blame] | 639 | req->a_addr.sba_pad = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | req->a_addr.alloc_addr = null_addr ; |
| 641 | |
| 642 | /* set P1A */ |
| 643 | req->cat.para.p_type = SMT_P001A ; |
| 644 | req->cat.para.p_len = sizeof(struct smt_p_001a) - PARA_LEN ; |
| 645 | req->cat.category = smc->mib.fddiESSCategory ; |
| 646 | |
| 647 | /* set P1B */ |
| 648 | req->tneg.para.p_type = SMT_P001B ; |
| 649 | req->tneg.para.p_len = sizeof(struct smt_p_001b) - PARA_LEN ; |
| 650 | req->tneg.max_t_neg = smc->mib.fddiESSMaxTNeg ; |
| 651 | |
| 652 | /* set P1C */ |
| 653 | req->segm.para.p_type = SMT_P001C ; |
| 654 | req->segm.para.p_len = sizeof(struct smt_p_001c) - PARA_LEN ; |
| 655 | req->segm.min_seg_siz = smc->mib.fddiESSMinSegmentSize ; |
| 656 | |
| 657 | dump_smt(smc,(struct smt_header *)req,"RAF") ; |
| 658 | ess_send_frame(smc,mb) ; |
| 659 | } |
| 660 | |
| 661 | static void ess_send_frame(struct s_smc *smc, SMbuf *mb) |
| 662 | { |
| 663 | /* |
| 664 | * check if the frame must be send to the own ESS |
| 665 | */ |
| 666 | if (smc->ess.local_sba_active) { |
| 667 | /* |
| 668 | * Send the Change Reply to the local SBA |
| 669 | */ |
| 670 | DB_ESS("ESS:Send to the local SBA\n",0,0) ; |
| 671 | if (!smc->ess.sba_reply_pend) |
| 672 | smc->ess.sba_reply_pend = mb ; |
| 673 | else { |
| 674 | DB_ESS("Frame is lost - another frame was pending\n",0,0); |
| 675 | smt_free_mbuf(smc,mb) ; |
| 676 | } |
| 677 | } |
| 678 | else { |
| 679 | /* |
| 680 | * Send the SBA RAF Change Reply to the network |
| 681 | */ |
| 682 | DB_ESS("ESS:Send to the network\n",0,0) ; |
| 683 | smt_send_frame(smc,mb,FC_SMT_INFO,0) ; |
| 684 | } |
| 685 | } |
| 686 | |
| 687 | void ess_para_change(struct s_smc *smc) |
| 688 | { |
| 689 | (void)process_bw_alloc(smc,(long)smc->mib.a[PATH0].fddiPATHSbaPayload, |
| 690 | (long)smc->mib.a[PATH0].fddiPATHSbaOverhead) ; |
| 691 | } |
| 692 | |
| 693 | static void ess_config_fifo(struct s_smc *smc) |
| 694 | { |
| 695 | /* |
| 696 | * if nothing to do exit |
| 697 | */ |
| 698 | if (smc->mib.a[PATH0].fddiPATHSbaPayload) { |
| 699 | if (smc->hw.fp.fifo.fifo_config_mode & SYNC_TRAFFIC_ON && |
| 700 | (smc->hw.fp.fifo.fifo_config_mode&SEND_ASYNC_AS_SYNC) == |
| 701 | smc->mib.fddiESSSynchTxMode) { |
| 702 | return ; |
| 703 | } |
| 704 | } |
| 705 | else { |
| 706 | if (!(smc->hw.fp.fifo.fifo_config_mode & SYNC_TRAFFIC_ON)) { |
| 707 | return ; |
| 708 | } |
| 709 | } |
| 710 | |
| 711 | /* |
| 712 | * split up the FIFO and reinitialize the queues |
| 713 | */ |
| 714 | formac_reinit_tx(smc) ; |
| 715 | } |
| 716 | |
| 717 | #endif /* ESS */ |
| 718 | |
| 719 | #endif /* no SLIM_SMT */ |
| 720 | |