Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 1 | /* Copied from gprs_bssgp_pcu.cpp |
| 2 | * |
| 3 | * Copyright (C) 2012 Ivan Klyuchnikov |
Holger Hans Peter Freyther | 8692128 | 2013-08-24 21:26:42 +0200 | [diff] [blame] | 4 | * Copyright (C) 2012 Andreas Eversberg <jolly@eversberg.eu> |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 5 | * Copyright (C) 2013 by Holger Hans Peter Freyther |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License |
| 9 | * as published by the Free Software Foundation; either version 2 |
| 10 | * of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 20 | */ |
| 21 | |
Holger Hans Peter Freyther | 67ed34e | 2013-10-17 17:01:54 +0200 | [diff] [blame] | 22 | #include <bts.h> |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 23 | #include <tbf.h> |
| 24 | #include <gprs_rlcmac.h> |
| 25 | #include <gprs_debug.h> |
| 26 | |
| 27 | extern "C" { |
| 28 | #include <osmocom/core/msgb.h> |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 29 | #include <osmocom/core/talloc.h> |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 30 | } |
| 31 | |
| 32 | #include <errno.h> |
| 33 | #include <string.h> |
| 34 | |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 35 | extern void *tall_pcu_ctx; |
| 36 | |
Holger Hans Peter Freyther | d1d114f | 2013-08-24 20:46:18 +0200 | [diff] [blame] | 37 | static inline void tbf_update_ms_class(struct gprs_rlcmac_tbf *tbf, |
| 38 | const uint8_t ms_class) |
| 39 | { |
| 40 | if (!tbf->ms_class && ms_class) |
| 41 | tbf->ms_class = ms_class; |
| 42 | } |
| 43 | |
Holger Hans Peter Freyther | d868928 | 2013-08-24 20:51:06 +0200 | [diff] [blame] | 44 | static inline void tbf_assign_imsi(struct gprs_rlcmac_tbf *tbf, |
| 45 | const char *imsi) |
| 46 | { |
| 47 | strncpy(tbf->meas.imsi, imsi, sizeof(tbf->meas.imsi) - 1); |
| 48 | } |
| 49 | |
Holger Hans Peter Freyther | 31d0df9 | 2013-08-24 20:42:45 +0200 | [diff] [blame] | 50 | static struct gprs_rlcmac_tbf *tbf_lookup_dl(const uint32_t tlli, const char *imsi) |
| 51 | { |
| 52 | /* TODO: look up by IMSI first, then tlli, then old_tlli */ |
| 53 | return tbf_by_tlli(tlli, GPRS_RLCMAC_DL_TBF); |
| 54 | } |
| 55 | |
| 56 | static int tbf_append_data(struct gprs_rlcmac_tbf *tbf, |
| 57 | struct gprs_rlcmac_bts *bts, |
| 58 | const uint8_t ms_class, |
| 59 | const uint16_t pdu_delay_csec, |
| 60 | const uint8_t *data, const uint16_t len) |
| 61 | { |
| 62 | LOGP(DRLCMAC, LOGL_INFO, "TBF: APPEND TFI: %u TLLI: 0x%08x\n", tbf->tfi, tbf->tlli); |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 63 | if (tbf->state_is(GPRS_RLCMAC_WAIT_RELEASE)) { |
Holger Hans Peter Freyther | 31d0df9 | 2013-08-24 20:42:45 +0200 | [diff] [blame] | 64 | LOGP(DRLCMAC, LOGL_DEBUG, "TBF in WAIT RELEASE state " |
| 65 | "(T3193), so reuse TBF\n"); |
| 66 | memcpy(tbf->llc_frame, data, len); |
| 67 | tbf->llc_length = len; |
| 68 | /* reset rlc states */ |
| 69 | memset(&tbf->dir.dl, 0, sizeof(tbf->dir.dl)); |
| 70 | /* keep to flags */ |
| 71 | tbf->state_flags &= GPRS_RLCMAC_FLAG_TO_MASK; |
| 72 | tbf->state_flags &= ~(1 << GPRS_RLCMAC_FLAG_CCCH); |
Holger Hans Peter Freyther | d1d114f | 2013-08-24 20:46:18 +0200 | [diff] [blame] | 73 | tbf_update_ms_class(tbf, ms_class); |
Holger Hans Peter Freyther | 1b33361 | 2013-10-17 18:26:33 +0200 | [diff] [blame] | 74 | tbf_update(bts, tbf); |
Holger Hans Peter Freyther | 344ff48 | 2013-10-17 12:01:04 +0200 | [diff] [blame] | 75 | gprs_rlcmac_trigger_downlink_assignment(bts, tbf, tbf, NULL); |
Holger Hans Peter Freyther | 31d0df9 | 2013-08-24 20:42:45 +0200 | [diff] [blame] | 76 | } else { |
| 77 | /* the TBF exists, so we must write it in the queue |
| 78 | * we prepend lifetime in front of PDU */ |
| 79 | struct timeval *tv; |
| 80 | struct msgb *llc_msg = msgb_alloc(len + sizeof(*tv), |
| 81 | "llc_pdu_queue"); |
| 82 | if (!llc_msg) |
| 83 | return -ENOMEM; |
| 84 | tv = (struct timeval *)msgb_put(llc_msg, sizeof(*tv)); |
| 85 | |
| 86 | uint16_t delay_csec; |
| 87 | if (bts->force_llc_lifetime) |
| 88 | delay_csec = bts->force_llc_lifetime; |
| 89 | else |
| 90 | delay_csec = pdu_delay_csec; |
| 91 | /* keep timestap at 0 for infinite delay */ |
| 92 | if (delay_csec != 0xffff) { |
| 93 | /* calculate timestamp of timeout */ |
| 94 | gettimeofday(tv, NULL); |
| 95 | tv->tv_usec += (delay_csec % 100) * 10000; |
| 96 | tv->tv_sec += delay_csec / 100; |
| 97 | if (tv->tv_usec > 999999) { |
| 98 | tv->tv_usec -= 1000000; |
| 99 | tv->tv_sec++; |
| 100 | } |
| 101 | } |
| 102 | memcpy(msgb_put(llc_msg, len), data, len); |
| 103 | msgb_enqueue(&tbf->llc_queue, llc_msg); |
Holger Hans Peter Freyther | d1d114f | 2013-08-24 20:46:18 +0200 | [diff] [blame] | 104 | tbf_update_ms_class(tbf, ms_class); |
Holger Hans Peter Freyther | 31d0df9 | 2013-08-24 20:42:45 +0200 | [diff] [blame] | 105 | } |
| 106 | |
| 107 | return 0; |
| 108 | } |
| 109 | |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 110 | static int tbf_new_dl_assignment(struct gprs_rlcmac_bts *bts, |
| 111 | const char *imsi, |
| 112 | const uint32_t tlli, const uint8_t ms_class, |
| 113 | const uint8_t *data, const uint16_t len) |
| 114 | { |
| 115 | uint8_t trx, ta, ss; |
| 116 | int8_t use_trx; |
| 117 | struct gprs_rlcmac_tbf *old_tbf, *tbf; |
| 118 | int8_t tfi; /* must be signed */ |
| 119 | int rc; |
| 120 | |
| 121 | /* check for uplink data, so we copy our informations */ |
Holger Hans Peter Freyther | bb20b2c | 2013-08-24 21:22:16 +0200 | [diff] [blame] | 122 | #warning "Do the same look up for IMSI, TLLI and OLD_TLLI" |
| 123 | #warning "Refactor the below lines... into a new method" |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 124 | tbf = tbf_by_tlli(tlli, GPRS_RLCMAC_UL_TBF); |
| 125 | if (tbf && tbf->dir.ul.contention_resolution_done |
| 126 | && !tbf->dir.ul.final_ack_sent) { |
Holger Hans Peter Freyther | 96efa70 | 2013-09-29 07:44:39 +0200 | [diff] [blame] | 127 | use_trx = tbf->trx_no; |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 128 | ta = tbf->ta; |
| 129 | ss = 0; |
| 130 | old_tbf = tbf; |
| 131 | } else { |
| 132 | use_trx = -1; |
| 133 | /* we already have an uplink TBF, so we use that TA */ |
| 134 | if (tbf) |
| 135 | ta = tbf->ta; |
| 136 | else { |
| 137 | /* recall TA */ |
| 138 | rc = recall_timing_advance(tlli); |
| 139 | if (rc < 0) { |
| 140 | LOGP(DRLCMAC, LOGL_NOTICE, "TA unknown" |
| 141 | ", assuming 0\n"); |
| 142 | ta = 0; |
| 143 | } else |
| 144 | ta = rc; |
| 145 | } |
| 146 | ss = 1; /* PCH assignment only allows one timeslot */ |
| 147 | old_tbf = NULL; |
| 148 | } |
| 149 | |
| 150 | // Create new TBF (any TRX) |
Holger Hans Peter Freyther | bcafdf8 | 2013-08-24 21:13:31 +0200 | [diff] [blame] | 151 | #warning "Copy and paste with alloc_ul_tbf" |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 152 | tfi = tfi_find_free(bts, GPRS_RLCMAC_DL_TBF, &trx, use_trx); |
| 153 | if (tfi < 0) { |
| 154 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH resource\n"); |
| 155 | /* FIXME: send reject */ |
| 156 | return -EBUSY; |
| 157 | } |
| 158 | /* set number of downlink slots according to multislot class */ |
| 159 | tbf = tbf_alloc(bts, tbf, GPRS_RLCMAC_DL_TBF, tfi, trx, ms_class, ss); |
| 160 | if (!tbf) { |
| 161 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH ressource\n"); |
| 162 | /* FIXME: send reject */ |
| 163 | return -EBUSY; |
| 164 | } |
| 165 | tbf->tlli = tlli; |
| 166 | tbf->tlli_valid = 1; |
| 167 | tbf->ta = ta; |
| 168 | |
| 169 | LOGP(DRLCMAC, LOGL_DEBUG, |
| 170 | "TBF: [DOWNLINK] START TFI: %d TLLI: 0x%08x \n", |
| 171 | tbf->tfi, tbf->tlli); |
| 172 | |
| 173 | /* new TBF, so put first frame */ |
| 174 | memcpy(tbf->llc_frame, data, len); |
| 175 | tbf->llc_length = len; |
| 176 | |
| 177 | /* trigger downlink assignment and set state to ASSIGN. |
| 178 | * we don't use old_downlink, so the possible uplink is used |
| 179 | * to trigger downlink assignment. if there is no uplink, |
| 180 | * AGCH is used. */ |
Holger Hans Peter Freyther | 344ff48 | 2013-10-17 12:01:04 +0200 | [diff] [blame] | 181 | gprs_rlcmac_trigger_downlink_assignment(bts, tbf, old_tbf, imsi); |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 182 | |
| 183 | /* store IMSI for debugging purpose. TODO: it is more than debugging */ |
| 184 | tbf_assign_imsi(tbf, imsi); |
| 185 | return 0; |
| 186 | } |
| 187 | |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 188 | /** |
| 189 | * TODO: split into unit test-able parts... |
| 190 | */ |
| 191 | int tbf_handle(struct gprs_rlcmac_bts *bts, |
| 192 | const uint32_t tlli, const char *imsi, |
Holger Hans Peter Freyther | 31d0df9 | 2013-08-24 20:42:45 +0200 | [diff] [blame] | 193 | const uint8_t ms_class, const uint16_t delay_csec, |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 194 | const uint8_t *data, const uint16_t len) |
| 195 | { |
| 196 | struct gprs_rlcmac_tbf *tbf; |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 197 | |
| 198 | /* check for existing TBF */ |
Holger Hans Peter Freyther | 31d0df9 | 2013-08-24 20:42:45 +0200 | [diff] [blame] | 199 | tbf = tbf_lookup_dl(tlli, imsi); |
| 200 | if (tbf) { |
| 201 | int rc = tbf_append_data(tbf, bts, ms_class, |
| 202 | delay_csec, data, len); |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 203 | if (rc >= 0) |
| 204 | tbf_assign_imsi(tbf, imsi); |
| 205 | return rc; |
| 206 | } |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 207 | |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 208 | return tbf_new_dl_assignment(bts, imsi, tlli, ms_class, data, len); |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 209 | } |
Holger Hans Peter Freyther | 8692128 | 2013-08-24 21:26:42 +0200 | [diff] [blame] | 210 | |
| 211 | struct gprs_rlcmac_tbf *tbf_alloc_ul(struct gprs_rlcmac_bts *bts, |
| 212 | int8_t use_trx, uint8_t ms_class, |
| 213 | uint32_t tlli, uint8_t ta, struct gprs_rlcmac_tbf *dl_tbf) |
| 214 | { |
| 215 | uint8_t trx; |
| 216 | struct gprs_rlcmac_tbf *tbf; |
| 217 | uint8_t tfi; |
| 218 | |
| 219 | #warning "Copy and paste with tbf_new_dl_assignment" |
| 220 | /* create new TBF, use sme TRX as DL TBF */ |
| 221 | tfi = tfi_find_free(bts, GPRS_RLCMAC_UL_TBF, &trx, use_trx); |
| 222 | if (tfi < 0) { |
| 223 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH ressource\n"); |
| 224 | /* FIXME: send reject */ |
| 225 | return NULL; |
| 226 | } |
| 227 | /* use multislot class of downlink TBF */ |
| 228 | tbf = tbf_alloc(bts, dl_tbf, GPRS_RLCMAC_UL_TBF, tfi, trx, ms_class, 0); |
| 229 | if (!tbf) { |
| 230 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH ressource\n"); |
| 231 | /* FIXME: send reject */ |
| 232 | return NULL; |
| 233 | } |
| 234 | tbf->tlli = tlli; |
| 235 | tbf->tlli_valid = 1; /* no contention resolution */ |
| 236 | tbf->dir.ul.contention_resolution_done = 1; |
| 237 | tbf->ta = ta; /* use current TA */ |
| 238 | tbf_new_state(tbf, GPRS_RLCMAC_ASSIGN); |
| 239 | tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_PACCH); |
| 240 | tbf_timer_start(tbf, 3169, bts->t3169, 0); |
| 241 | |
| 242 | return tbf; |
| 243 | } |
Holger Hans Peter Freyther | 964ddb6 | 2013-10-16 17:53:23 +0200 | [diff] [blame] | 244 | |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 245 | static void tbf_unlink_pdch(struct gprs_rlcmac_tbf *tbf) |
| 246 | { |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 247 | struct gprs_rlcmac_pdch *pdch; |
| 248 | int ts; |
| 249 | |
| 250 | if (tbf->direction == GPRS_RLCMAC_UL_TBF) { |
Holger Hans Peter Freyther | 173a240 | 2013-10-16 21:47:45 +0200 | [diff] [blame] | 251 | tbf->trx->ul_tbf[tbf->tfi] = NULL; |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 252 | for (ts = 0; ts < 8; ts++) { |
| 253 | pdch = tbf->pdch[ts]; |
| 254 | if (pdch) |
| 255 | pdch->ul_tbf[tbf->tfi] = NULL; |
| 256 | tbf->pdch[ts] = NULL; |
| 257 | } |
| 258 | } else { |
Holger Hans Peter Freyther | 173a240 | 2013-10-16 21:47:45 +0200 | [diff] [blame] | 259 | tbf->trx->dl_tbf[tbf->tfi] = NULL; |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 260 | for (ts = 0; ts < 8; ts++) { |
| 261 | pdch = tbf->pdch[ts]; |
| 262 | if (pdch) |
| 263 | pdch->dl_tbf[tbf->tfi] = NULL; |
| 264 | tbf->pdch[ts] = NULL; |
| 265 | } |
| 266 | } |
| 267 | } |
| 268 | |
| 269 | void tbf_free(struct gprs_rlcmac_tbf *tbf) |
| 270 | { |
| 271 | struct msgb *msg; |
| 272 | |
| 273 | /* Give final measurement report */ |
| 274 | gprs_rlcmac_rssi_rep(tbf); |
| 275 | gprs_rlcmac_lost_rep(tbf); |
| 276 | |
| 277 | debug_diagram(tbf->diag, "+---------------+"); |
| 278 | debug_diagram(tbf->diag, "| THE END |"); |
| 279 | debug_diagram(tbf->diag, "+---------------+"); |
| 280 | LOGP(DRLCMAC, LOGL_INFO, "Free %s TBF=%d with TLLI=0x%08x.\n", |
| 281 | (tbf->direction == GPRS_RLCMAC_UL_TBF) ? "UL" : "DL", tbf->tfi, |
| 282 | tbf->tlli); |
| 283 | if (tbf->ul_ass_state != GPRS_RLCMAC_UL_ASS_NONE) |
| 284 | LOGP(DRLCMAC, LOGL_ERROR, "Software error: Pending uplink " |
| 285 | "assignment. This may not happen, because the " |
| 286 | "assignment message never gets transmitted. Please " |
| 287 | "be shure not to free in this state. PLEASE FIX!\n"); |
| 288 | if (tbf->dl_ass_state != GPRS_RLCMAC_DL_ASS_NONE) |
| 289 | LOGP(DRLCMAC, LOGL_ERROR, "Software error: Pending downlink " |
| 290 | "assignment. This may not happen, because the " |
| 291 | "assignment message never gets transmitted. Please " |
| 292 | "be shure not to free in this state. PLEASE FIX!\n"); |
| 293 | tbf_timer_stop(tbf); |
| 294 | while ((msg = msgb_dequeue(&tbf->llc_queue))) |
| 295 | msgb_free(msg); |
| 296 | tbf_unlink_pdch(tbf); |
| 297 | llist_del(&tbf->list); |
| 298 | LOGP(DRLCMAC, LOGL_DEBUG, "********** TBF ends here **********\n"); |
| 299 | talloc_free(tbf); |
| 300 | } |
| 301 | |
Holger Hans Peter Freyther | 1b33361 | 2013-10-17 18:26:33 +0200 | [diff] [blame] | 302 | int tbf_update(struct gprs_rlcmac_bts *bts, |
| 303 | struct gprs_rlcmac_tbf *tbf) |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 304 | { |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 305 | struct gprs_rlcmac_tbf *ul_tbf = NULL; |
| 306 | int rc; |
| 307 | |
| 308 | LOGP(DRLCMAC, LOGL_DEBUG, "********** TBF update **********\n"); |
| 309 | |
| 310 | if (tbf->direction != GPRS_RLCMAC_DL_TBF) |
| 311 | return -EINVAL; |
| 312 | |
| 313 | if (!tbf->ms_class) { |
| 314 | LOGP(DRLCMAC, LOGL_DEBUG, "- Cannot update, no class\n"); |
| 315 | return -EINVAL; |
| 316 | } |
| 317 | |
| 318 | ul_tbf = tbf_by_tlli(tbf->tlli, GPRS_RLCMAC_UL_TBF); |
| 319 | |
| 320 | tbf_unlink_pdch(tbf); |
| 321 | rc = bts->alloc_algorithm(bts, ul_tbf, tbf, bts->alloc_algorithm_curst, 0); |
| 322 | /* if no ressource */ |
| 323 | if (rc < 0) { |
| 324 | LOGP(DRLCMAC, LOGL_ERROR, "No ressource after update???\n"); |
| 325 | return -rc; |
| 326 | } |
| 327 | |
| 328 | return 0; |
| 329 | } |
| 330 | |
| 331 | int tbf_assign_control_ts(struct gprs_rlcmac_tbf *tbf) |
| 332 | { |
| 333 | if (tbf->control_ts == 0xff) |
| 334 | LOGP(DRLCMAC, LOGL_INFO, "- Setting Control TS %d\n", |
| 335 | tbf->first_common_ts); |
| 336 | else if (tbf->control_ts != tbf->first_common_ts) |
| 337 | LOGP(DRLCMAC, LOGL_INFO, "- Changing Control TS %d\n", |
| 338 | tbf->first_common_ts); |
| 339 | tbf->control_ts = tbf->first_common_ts; |
| 340 | |
| 341 | return 0; |
| 342 | } |
| 343 | |
| 344 | static const char *tbf_state_name[] = { |
| 345 | "NULL", |
| 346 | "ASSIGN", |
| 347 | "FLOW", |
| 348 | "FINISHED", |
| 349 | "WAIT RELEASE", |
| 350 | "RELEASING", |
| 351 | }; |
| 352 | |
| 353 | void tbf_new_state(struct gprs_rlcmac_tbf *tbf, |
| 354 | enum gprs_rlcmac_tbf_state state) |
| 355 | { |
| 356 | debug_diagram(tbf->diag, "->%s", tbf_state_name[state]); |
| 357 | LOGP(DRLCMAC, LOGL_DEBUG, "%s TBF=%d changes state from %s to %s\n", |
| 358 | (tbf->direction == GPRS_RLCMAC_UL_TBF) ? "UL" : "DL", tbf->tfi, |
| 359 | tbf_state_name[tbf->state], tbf_state_name[state]); |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 360 | tbf->set_state(state); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 361 | } |
| 362 | |
| 363 | void tbf_timer_start(struct gprs_rlcmac_tbf *tbf, unsigned int T, |
| 364 | unsigned int seconds, unsigned int microseconds) |
| 365 | { |
| 366 | if (!osmo_timer_pending(&tbf->timer)) |
| 367 | LOGP(DRLCMAC, LOGL_DEBUG, "Starting %s TBF=%d timer %u.\n", |
| 368 | (tbf->direction == GPRS_RLCMAC_UL_TBF) ? "UL" : "DL", |
| 369 | tbf->tfi, T); |
| 370 | else |
| 371 | LOGP(DRLCMAC, LOGL_DEBUG, "Restarting %s TBF=%d timer %u " |
| 372 | "while old timer %u pending \n", |
| 373 | (tbf->direction == GPRS_RLCMAC_UL_TBF) ? "UL" : "DL", |
| 374 | tbf->tfi, T, tbf->T); |
| 375 | |
| 376 | tbf->T = T; |
| 377 | tbf->num_T_exp = 0; |
| 378 | |
| 379 | /* Tunning timers can be safely re-scheduled. */ |
| 380 | tbf->timer.data = tbf; |
| 381 | tbf->timer.cb = &tbf_timer_cb; |
| 382 | |
| 383 | osmo_timer_schedule(&tbf->timer, seconds, microseconds); |
| 384 | } |
| 385 | |
| 386 | void tbf_timer_stop(struct gprs_rlcmac_tbf *tbf) |
| 387 | { |
| 388 | if (osmo_timer_pending(&tbf->timer)) { |
| 389 | LOGP(DRLCMAC, LOGL_DEBUG, "Stopping %s TBF=%d timer %u.\n", |
| 390 | (tbf->direction == GPRS_RLCMAC_UL_TBF) ? "UL" : "DL", |
| 391 | tbf->tfi, tbf->T); |
| 392 | osmo_timer_del(&tbf->timer); |
| 393 | } |
| 394 | } |
| 395 | |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 396 | /* lookup TBF Entity (by TFI) */ |
| 397 | struct gprs_rlcmac_tbf *tbf_by_tfi(struct gprs_rlcmac_bts *bts, |
| 398 | uint8_t tfi, uint8_t trx, enum gprs_rlcmac_tbf_direction dir) |
| 399 | { |
| 400 | struct gprs_rlcmac_tbf *tbf; |
| 401 | |
| 402 | if (tfi >= 32 || trx >= 8) |
| 403 | return NULL; |
| 404 | |
| 405 | if (dir == GPRS_RLCMAC_UL_TBF) |
| 406 | tbf = bts->trx[trx].ul_tbf[tfi]; |
| 407 | else |
| 408 | tbf = bts->trx[trx].dl_tbf[tfi]; |
| 409 | if (!tbf) |
| 410 | return NULL; |
| 411 | |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 412 | if (tbf->state_is_not(GPRS_RLCMAC_RELEASING)) |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 413 | return tbf; |
| 414 | |
| 415 | return NULL; |
| 416 | } |
| 417 | |
| 418 | /* search for active downlink or uplink tbf */ |
| 419 | struct gprs_rlcmac_tbf *tbf_by_tlli(uint32_t tlli, |
| 420 | enum gprs_rlcmac_tbf_direction dir) |
| 421 | { |
| 422 | struct gprs_rlcmac_tbf *tbf; |
| 423 | if (dir == GPRS_RLCMAC_UL_TBF) { |
| 424 | llist_for_each_entry(tbf, &gprs_rlcmac_ul_tbfs, list) { |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 425 | if (tbf->state_is_not(GPRS_RLCMAC_RELEASING) |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 426 | && tbf->tlli == tlli && tbf->tlli_valid) |
| 427 | return tbf; |
| 428 | } |
| 429 | } else { |
| 430 | llist_for_each_entry(tbf, &gprs_rlcmac_dl_tbfs, list) { |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 431 | if (tbf->state_is_not(GPRS_RLCMAC_RELEASING) |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 432 | && tbf->tlli == tlli) |
| 433 | return tbf; |
| 434 | } |
| 435 | } |
| 436 | return NULL; |
| 437 | } |
| 438 | |
| 439 | struct gprs_rlcmac_tbf *tbf_by_poll_fn(uint32_t fn, uint8_t trx, uint8_t ts) |
| 440 | { |
| 441 | struct gprs_rlcmac_tbf *tbf; |
| 442 | |
| 443 | /* only one TBF can poll on specific TS/FN, because scheduler can only |
| 444 | * schedule one downlink control block (with polling) at a FN per TS */ |
| 445 | llist_for_each_entry(tbf, &gprs_rlcmac_ul_tbfs, list) { |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 446 | if (tbf->state_is_not(GPRS_RLCMAC_RELEASING) |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 447 | && tbf->poll_state == GPRS_RLCMAC_POLL_SCHED |
Holger Hans Peter Freyther | 96efa70 | 2013-09-29 07:44:39 +0200 | [diff] [blame] | 448 | && tbf->poll_fn == fn && tbf->trx_no == trx |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 449 | && tbf->control_ts == ts) |
| 450 | return tbf; |
| 451 | } |
| 452 | llist_for_each_entry(tbf, &gprs_rlcmac_dl_tbfs, list) { |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 453 | if (tbf->state_is_not(GPRS_RLCMAC_RELEASING) |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 454 | && tbf->poll_state == GPRS_RLCMAC_POLL_SCHED |
Holger Hans Peter Freyther | 96efa70 | 2013-09-29 07:44:39 +0200 | [diff] [blame] | 455 | && tbf->poll_fn == fn && tbf->trx_no == trx |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 456 | && tbf->control_ts == ts) |
| 457 | return tbf; |
| 458 | } |
| 459 | return NULL; |
| 460 | } |
| 461 | |
| 462 | struct gprs_rlcmac_tbf *tbf_alloc(struct gprs_rlcmac_bts *bts, |
| 463 | struct gprs_rlcmac_tbf *old_tbf, enum gprs_rlcmac_tbf_direction dir, |
| 464 | uint8_t tfi, uint8_t trx, |
| 465 | uint8_t ms_class, uint8_t single_slot) |
| 466 | { |
| 467 | struct gprs_rlcmac_tbf *tbf; |
| 468 | int rc; |
| 469 | |
| 470 | #ifdef DEBUG_DIAGRAM |
| 471 | /* hunt for first free number in diagram */ |
| 472 | int diagram_num; |
| 473 | for (diagram_num = 0; ; diagram_num++) { |
| 474 | llist_for_each_entry(tbf, &gprs_rlcmac_ul_tbfs, list) { |
| 475 | if (tbf->diag == diagram_num) |
| 476 | goto next_diagram; |
| 477 | } |
| 478 | llist_for_each_entry(tbf, &gprs_rlcmac_dl_tbfs, list) { |
| 479 | if (tbf->diag == diagram_num) |
| 480 | goto next_diagram; |
| 481 | } |
| 482 | break; |
| 483 | next_diagram: |
| 484 | continue; |
| 485 | } |
| 486 | #endif |
| 487 | |
| 488 | LOGP(DRLCMAC, LOGL_DEBUG, "********** TBF starts here **********\n"); |
| 489 | LOGP(DRLCMAC, LOGL_INFO, "Allocating %s TBF: TFI=%d TRX=%d " |
| 490 | "MS_CLASS=%d\n", (dir == GPRS_RLCMAC_UL_TBF) ? "UL" : "DL", |
| 491 | tfi, trx, ms_class); |
| 492 | |
| 493 | if (trx >= 8 || tfi >= 32) |
| 494 | return NULL; |
| 495 | |
| 496 | tbf = talloc_zero(tall_pcu_ctx, struct gprs_rlcmac_tbf); |
| 497 | if (!tbf) |
| 498 | return NULL; |
| 499 | |
| 500 | #ifdef DEBUG_DIAGRAM |
| 501 | tbf->diag = diagram_num; |
| 502 | #endif |
| 503 | tbf->direction = dir; |
| 504 | tbf->tfi = tfi; |
Holger Hans Peter Freyther | 96efa70 | 2013-09-29 07:44:39 +0200 | [diff] [blame] | 505 | tbf->trx_no = trx; |
Holger Hans Peter Freyther | 743bafa | 2013-09-29 07:50:50 +0200 | [diff] [blame] | 506 | tbf->trx = &bts->trx[trx]; |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 507 | tbf->arfcn = bts->trx[trx].arfcn; |
| 508 | tbf->ms_class = ms_class; |
| 509 | tbf->ws = 64; |
| 510 | tbf->sns = 128; |
| 511 | /* select algorithm */ |
| 512 | rc = bts->alloc_algorithm(bts, old_tbf, tbf, bts->alloc_algorithm_curst, |
| 513 | single_slot); |
| 514 | /* if no ressource */ |
| 515 | if (rc < 0) { |
| 516 | talloc_free(tbf); |
| 517 | return NULL; |
| 518 | } |
| 519 | /* assign control ts */ |
| 520 | tbf->control_ts = 0xff; |
| 521 | rc = tbf_assign_control_ts(tbf); |
| 522 | /* if no ressource */ |
| 523 | if (rc < 0) { |
| 524 | talloc_free(tbf); |
| 525 | return NULL; |
| 526 | } |
| 527 | |
| 528 | /* set timestamp */ |
| 529 | gettimeofday(&tbf->meas.dl_bw_tv, NULL); |
| 530 | gettimeofday(&tbf->meas.rssi_tv, NULL); |
| 531 | gettimeofday(&tbf->meas.dl_loss_tv, NULL); |
| 532 | |
| 533 | INIT_LLIST_HEAD(&tbf->llc_queue); |
| 534 | if (dir == GPRS_RLCMAC_UL_TBF) |
| 535 | llist_add(&tbf->list, &gprs_rlcmac_ul_tbfs); |
| 536 | else |
| 537 | llist_add(&tbf->list, &gprs_rlcmac_dl_tbfs); |
| 538 | |
| 539 | debug_diagram(tbf->diag, "+-----------------+"); |
| 540 | debug_diagram(tbf->diag, "|NEW %s TBF TFI=%2d|", |
| 541 | (dir == GPRS_RLCMAC_UL_TBF) ? "UL" : "DL", tfi); |
| 542 | debug_diagram(tbf->diag, "+-----------------+"); |
| 543 | |
| 544 | return tbf; |
| 545 | } |
| 546 | |
| 547 | void tbf_timer_cb(void *_tbf) |
| 548 | { |
| 549 | struct gprs_rlcmac_tbf *tbf = (struct gprs_rlcmac_tbf *)_tbf; |
| 550 | |
| 551 | LOGP(DRLCMAC, LOGL_DEBUG, "%s TBF=%d timer %u expired.\n", |
| 552 | (tbf->direction == GPRS_RLCMAC_UL_TBF) ? "UL" : "DL", tbf->tfi, |
| 553 | tbf->T); |
| 554 | |
| 555 | tbf->num_T_exp++; |
| 556 | |
| 557 | switch (tbf->T) { |
| 558 | #ifdef DEBUG_DL_ASS_IDLE |
| 559 | case 1234: |
| 560 | gprs_rlcmac_trigger_downlink_assignment(tbf, NULL, debug_imsi); |
| 561 | break; |
| 562 | #endif |
| 563 | case 0: /* assignment */ |
| 564 | if ((tbf->state_flags & (1 << GPRS_RLCMAC_FLAG_PACCH))) { |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 565 | if (tbf->state_is(GPRS_RLCMAC_ASSIGN)) { |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 566 | LOGP(DRLCMAC, LOGL_NOTICE, "Releasing due to " |
| 567 | "PACCH assignment timeout.\n"); |
| 568 | tbf_free(tbf); |
| 569 | } else |
| 570 | LOGP(DRLCMAC, LOGL_ERROR, "Error: TBF is not " |
| 571 | "in assign state\n"); |
| 572 | } |
| 573 | if ((tbf->state_flags & (1 << GPRS_RLCMAC_FLAG_CCCH))) { |
| 574 | /* change state to FLOW, so scheduler will start transmission */ |
| 575 | tbf->dir.dl.wait_confirm = 0; |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 576 | if (tbf->state_is(GPRS_RLCMAC_ASSIGN)) { |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 577 | tbf_new_state(tbf, GPRS_RLCMAC_FLOW); |
| 578 | tbf_assign_control_ts(tbf); |
| 579 | } else |
| 580 | LOGP(DRLCMAC, LOGL_NOTICE, "Continue flow after " |
| 581 | "IMM.ASS confirm\n"); |
| 582 | } |
| 583 | break; |
| 584 | case 3169: |
| 585 | case 3191: |
| 586 | case 3195: |
| 587 | LOGP(DRLCMAC, LOGL_NOTICE, "TBF T%d timeout during " |
| 588 | "transsmission\n", tbf->T); |
| 589 | tbf->rlcmac_diag(); |
| 590 | /* fall through */ |
| 591 | case 3193: |
| 592 | if (tbf->T == 3193) |
| 593 | debug_diagram(tbf->diag, "T3193 timeout"); |
| 594 | LOGP(DRLCMAC, LOGL_DEBUG, "TBF will be freed due to timeout\n"); |
| 595 | /* free TBF */ |
| 596 | tbf_free(tbf); |
| 597 | break; |
| 598 | default: |
| 599 | LOGP(DRLCMAC, LOGL_ERROR, "Timer expired in unknown mode: %u\n", |
| 600 | tbf->T); |
| 601 | } |
| 602 | } |
| 603 | |
| 604 | int gprs_rlcmac_tbf::rlcmac_diag() |
| 605 | { |
| 606 | if ((state_flags & (1 << GPRS_RLCMAC_FLAG_CCCH))) |
| 607 | LOGP(DRLCMAC, LOGL_NOTICE, "- Assignment was on CCCH\n"); |
| 608 | if ((state_flags & (1 << GPRS_RLCMAC_FLAG_PACCH))) |
| 609 | LOGP(DRLCMAC, LOGL_NOTICE, "- Assignment was on PACCH\n"); |
| 610 | if ((state_flags & (1 << GPRS_RLCMAC_FLAG_UL_DATA))) |
| 611 | LOGP(DRLCMAC, LOGL_NOTICE, "- Uplink data was received\n"); |
| 612 | else if (direction == GPRS_RLCMAC_UL_TBF) |
| 613 | LOGP(DRLCMAC, LOGL_NOTICE, "- No uplink data received yet\n"); |
| 614 | if ((state_flags & (1 << GPRS_RLCMAC_FLAG_DL_ACK))) |
| 615 | LOGP(DRLCMAC, LOGL_NOTICE, "- Downlink ACK was received\n"); |
| 616 | else if (direction == GPRS_RLCMAC_DL_TBF) |
| 617 | LOGP(DRLCMAC, LOGL_NOTICE, "- No downlink ACK received yet\n"); |
| 618 | |
| 619 | return 0; |
| 620 | } |
| 621 | |
Holger Hans Peter Freyther | 964ddb6 | 2013-10-16 17:53:23 +0200 | [diff] [blame] | 622 | void gprs_rlcmac_tbf::free_all(struct gprs_rlcmac_trx *trx) |
| 623 | { |
| 624 | for (uint8_t tfi = 0; tfi < 32; tfi++) { |
| 625 | struct gprs_rlcmac_tbf *tbf; |
| 626 | |
| 627 | tbf = trx->ul_tbf[tfi]; |
| 628 | if (tbf) |
| 629 | tbf_free(tbf); |
| 630 | tbf = trx->dl_tbf[tfi]; |
| 631 | if (tbf) |
| 632 | tbf_free(tbf); |
| 633 | } |
| 634 | } |
Holger Hans Peter Freyther | 4f6a4e5d | 2013-10-16 17:58:46 +0200 | [diff] [blame] | 635 | |
| 636 | void gprs_rlcmac_tbf::free_all(struct gprs_rlcmac_pdch *pdch) |
| 637 | { |
| 638 | for (uint8_t tfi = 0; tfi < 32; tfi++) { |
| 639 | struct gprs_rlcmac_tbf *tbf; |
| 640 | |
| 641 | tbf = pdch->ul_tbf[tfi]; |
| 642 | if (tbf) |
| 643 | tbf_free(tbf); |
| 644 | tbf = pdch->dl_tbf[tfi]; |
| 645 | if (tbf) |
| 646 | tbf_free(tbf); |
| 647 | } |
| 648 | } |