Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 1 | /* gprs_rlcmac.cpp |
| 2 | * |
| 3 | * Copyright (C) 2012 Ivan Klyuchnikov |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 4 | * Copyright (C) 2012 Andreas Eversberg <jolly@eversberg.eu> |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version 2 |
| 9 | * of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 19 | */ |
| 20 | |
| 21 | #include <gprs_bssgp_pcu.h> |
| 22 | #include <pcu_l1_if.h> |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 23 | #include <gprs_rlcmac.h> |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 24 | #include <gsmL1prim.h> |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 25 | |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 26 | LLIST_HEAD(gprs_rlcmac_tbfs); |
| 27 | void *rlcmac_tall_ctx; |
| 28 | |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 29 | /* FIXME: spread ressources on multiple TRX */ |
| 30 | int tfi_alloc(uint8_t *_trx, uint8_t *_ts) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 31 | { |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 32 | struct gprs_rlcmac_bts *bts = gprs_rlcmac_bts; |
| 33 | struct gprs_rlcmac_pdch *pdch; |
| 34 | uint8_t trx, ts, tfi; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 35 | |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 36 | for (trx = 0; trx < 8; trx++) { |
| 37 | for (ts = 0; ts < 8; ts++) { |
| 38 | pdch = &bts->trx[trx].pdch[ts]; |
| 39 | if (!pdch->enable) |
| 40 | continue; |
| 41 | break; |
| 42 | } |
| 43 | if (ts < 8) |
| 44 | break; |
| 45 | } |
| 46 | if (trx == 8) { |
| 47 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH available.\n"); |
| 48 | return -EINVAL; |
| 49 | } |
| 50 | |
| 51 | |
| 52 | LOGP(DRLCMAC, LOGL_DEBUG, "Searching for first unallocated TFI: " |
| 53 | "TRX=%d TS=%d\n", trx, ts); |
| 54 | for (tfi = 0; tfi < 32; tfi++) { |
| 55 | if (!pdch->tbf[tfi]) |
| 56 | break; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 57 | } |
| 58 | |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 59 | if (tfi < 32) { |
| 60 | LOGP(DRLCMAC, LOGL_DEBUG, " Found TFI=%d.\n", tfi); |
| 61 | *_trx = trx; |
| 62 | *_ts = ts; |
| 63 | return tfi; |
| 64 | } |
| 65 | LOGP(DRLCMAC, LOGL_NOTICE, "No TFI available.\n"); |
| 66 | |
| 67 | return -1; |
| 68 | } |
| 69 | |
| 70 | int find_free_usf(uint8_t trx, uint8_t ts) |
| 71 | { |
| 72 | struct gprs_rlcmac_bts *bts = gprs_rlcmac_bts; |
| 73 | struct gprs_rlcmac_pdch *pdch; |
| 74 | struct gprs_rlcmac_tbf *tbf; |
| 75 | uint8_t usf_map = 0; |
| 76 | uint8_t tfi, usf; |
| 77 | |
| 78 | if (trx >= 8 || ts >= 8) |
| 79 | return -EINVAL; |
| 80 | pdch = &bts->trx[trx].pdch[ts]; |
| 81 | |
| 82 | /* make map of used USF */ |
| 83 | for (tfi = 0; tfi < 32; tfi++) { |
| 84 | tbf = pdch->tbf[tfi]; |
| 85 | if (!tbf) |
| 86 | continue; |
| 87 | if (tbf->direction != GPRS_RLCMAC_UL_TBF) |
| 88 | continue; |
| 89 | usf_map |= (1 << tbf->dir.ul.usf); |
| 90 | } |
| 91 | |
| 92 | /* look for USF, don't use USF=7 */ |
| 93 | for (usf = 0; usf < 7; usf++) { |
| 94 | if (!(usf_map & (1 << usf))) { |
| 95 | LOGP(DRLCMAC, LOGL_DEBUG, " Found USF=%d.\n", usf); |
| 96 | return usf; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 97 | } |
| 98 | } |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 99 | LOGP(DRLCMAC, LOGL_NOTICE, "No USF available.\n"); |
| 100 | |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 101 | return -1; |
| 102 | } |
| 103 | |
| 104 | /* lookup TBF Entity (by TFI) */ |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 105 | #warning FIXME: use pdch instance by trx and ts, because tfi is local |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 106 | struct gprs_rlcmac_tbf *tbf_by_tfi(uint8_t tfi, int direction) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 107 | { |
| 108 | struct gprs_rlcmac_tbf *tbf; |
| 109 | |
| 110 | llist_for_each_entry(tbf, &gprs_rlcmac_tbfs, list) { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 111 | if (tbf->state != GPRS_RLCMAC_RELEASING |
| 112 | && tbf->tfi == tfi |
| 113 | && tbf->direction == direction) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 114 | return tbf; |
| 115 | } |
| 116 | return NULL; |
| 117 | } |
| 118 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 119 | /* search for active downlink or uplink tbf */ |
| 120 | struct gprs_rlcmac_tbf *tbf_by_tlli(uint32_t tlli, int direction) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 121 | { |
| 122 | struct gprs_rlcmac_tbf *tbf; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 123 | llist_for_each_entry(tbf, &gprs_rlcmac_tbfs, list) { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 124 | if (tbf->state != GPRS_RLCMAC_RELEASING |
| 125 | && tbf->tlli == tlli |
| 126 | && tbf->direction == direction) |
| 127 | return tbf; |
| 128 | } |
| 129 | return NULL; |
| 130 | } |
| 131 | |
| 132 | #warning FIXME: use pdch instance by trx and ts, because polling is local |
| 133 | struct gprs_rlcmac_tbf *tbf_by_poll_fn(uint32_t fn) |
| 134 | { |
| 135 | struct gprs_rlcmac_tbf *tbf; |
| 136 | llist_for_each_entry(tbf, &gprs_rlcmac_tbfs, list) { |
| 137 | if (tbf->state != GPRS_RLCMAC_RELEASING |
| 138 | && tbf->poll_state == GPRS_RLCMAC_POLL_SCHED |
| 139 | && tbf->poll_fn == fn) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 140 | return tbf; |
| 141 | } |
| 142 | return NULL; |
| 143 | } |
| 144 | |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame] | 145 | struct gprs_rlcmac_tbf *tbf_alloc(uint8_t tfi, uint8_t trx, uint8_t ts) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 146 | { |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 147 | struct gprs_rlcmac_bts *bts = gprs_rlcmac_bts; |
| 148 | struct gprs_rlcmac_pdch *pdch; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 149 | struct gprs_rlcmac_tbf *tbf; |
| 150 | |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 151 | LOGP(DRLCMAC, LOGL_INFO, "********** TBF starts here **********\n"); |
| 152 | LOGP(DRLCMAC, LOGL_INFO, "Allocating TBF with TFI=%d.\n", tfi); |
| 153 | |
| 154 | if (trx >= 8 || ts >= 8 || tfi >= 32) |
| 155 | return NULL; |
| 156 | pdch = &bts->trx[trx].pdch[ts]; |
| 157 | |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 158 | tbf = talloc_zero(rlcmac_tall_ctx, struct gprs_rlcmac_tbf); |
| 159 | if (!tbf) |
| 160 | return NULL; |
| 161 | |
| 162 | tbf->tfi = tfi; |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame] | 163 | tbf->trx = trx; |
| 164 | tbf->ts = ts; |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 165 | tbf->arfcn = bts->trx[trx].arfcn; |
| 166 | tbf->tsc = bts->trx[trx].pdch[ts].tsc; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 167 | tbf->pdch = pdch; |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 168 | tbf->ws = 64; |
| 169 | tbf->sns = 128; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 170 | INIT_LLIST_HEAD(&tbf->llc_queue); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 171 | llist_add(&tbf->list, &gprs_rlcmac_tbfs); |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 172 | pdch->tbf[tfi] = tbf; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 173 | |
| 174 | return tbf; |
| 175 | } |
| 176 | |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame] | 177 | void tbf_free(struct gprs_rlcmac_tbf *tbf) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 178 | { |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 179 | struct gprs_rlcmac_bts *bts = gprs_rlcmac_bts; |
| 180 | struct gprs_rlcmac_pdch *pdch; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 181 | struct msgb *msg; |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 182 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 183 | LOGP(DRLCMAC, LOGL_INFO, "Free TBF=%d with TLLI=0x%08x.\n", tbf->tfi, |
| 184 | tbf->tlli); |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 185 | tbf_timer_stop(tbf); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 186 | while ((msg = msgb_dequeue(&tbf->llc_queue))) |
| 187 | msgb_free(msg); |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 188 | pdch = &bts->trx[tbf->trx].pdch[tbf->ts]; |
| 189 | pdch->tbf[tbf->tfi] = NULL; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 190 | llist_del(&tbf->list); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 191 | LOGP(DRLCMAC, LOGL_INFO, "********** TBF ends here **********\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 192 | talloc_free(tbf); |
| 193 | } |
| 194 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 195 | const char *tbf_state_name[] = { |
| 196 | "NULL", |
| 197 | "ASSIGN", |
| 198 | "FLOW", |
| 199 | "FINISHED", |
| 200 | "WAIT RELEASE", |
| 201 | "RELEASING", |
| 202 | }; |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 203 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 204 | void tbf_new_state(struct gprs_rlcmac_tbf *tbf, |
| 205 | enum gprs_rlcmac_tbf_state state) |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 206 | { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 207 | LOGP(DRLCMAC, LOGL_INFO, "TBF=%d changes state from %s to %s\n", |
| 208 | tbf->tfi, tbf_state_name[tbf->state], tbf_state_name[state]); |
| 209 | tbf->state = state; |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 210 | } |
| 211 | |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 212 | void tbf_timer_start(struct gprs_rlcmac_tbf *tbf, unsigned int T, |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 213 | unsigned int seconds, unsigned int microseconds) |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 214 | { |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 215 | if (!osmo_timer_pending(&tbf->timer)) |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 216 | LOGP(DRLCMAC, LOGL_DEBUG, "Starting TBF=%d timer %u.\n", |
| 217 | tbf->tfi, T); |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 218 | else |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 219 | LOGP(DRLCMAC, LOGL_DEBUG, "Restarting TBF=%d timer %u while " |
| 220 | "old timer %u pending \n", tbf->tfi, T, tbf->T); |
Ivan Kluchnikov | 856221f | 2012-06-15 09:31:29 +0400 | [diff] [blame] | 221 | |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 222 | tbf->T = T; |
| 223 | tbf->num_T_exp = 0; |
| 224 | |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 225 | /* Tunning timers can be safely re-scheduled. */ |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 226 | tbf->timer.data = tbf; |
| 227 | tbf->timer.cb = &tbf_timer_cb; |
| 228 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 229 | osmo_timer_schedule(&tbf->timer, seconds, microseconds); |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 230 | } |
| 231 | |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 232 | void tbf_timer_stop(struct gprs_rlcmac_tbf *tbf) |
| 233 | { |
| 234 | if (osmo_timer_pending(&tbf->timer)) { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 235 | LOGP(DRLCMAC, LOGL_DEBUG, "Stopping TBF=%d timer %u.\n", |
| 236 | tbf->tfi, tbf->T); |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 237 | osmo_timer_del(&tbf->timer); |
| 238 | } |
| 239 | } |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 240 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 241 | #if 0 |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 242 | static void tbf_gsm_timer_cb(void *_tbf) |
| 243 | { |
| 244 | struct gprs_rlcmac_tbf *tbf = (struct gprs_rlcmac_tbf *)_tbf; |
| 245 | |
| 246 | tbf->num_fT_exp++; |
| 247 | |
| 248 | switch (tbf->fT) { |
| 249 | case 0: |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 250 | hier alles überdenken |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 251 | // This is timer for delay RLC/MAC data sending after Downlink Immediate Assignment on CCCH. |
| 252 | gprs_rlcmac_segment_llc_pdu(tbf); |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 253 | LOGP(DRLCMAC, LOGL_NOTICE, "TBF: [DOWNLINK] END TFI: %u TLLI: 0x%08x \n", tbf->tfi, tbf->tlli); |
Ivan Kluchnikov | 9c795ab | 2012-05-24 23:12:59 +0400 | [diff] [blame] | 254 | tbf_free(tbf); |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 255 | break; |
| 256 | default: |
Ivan Kluchnikov | 856221f | 2012-06-15 09:31:29 +0400 | [diff] [blame] | 257 | LOGP(DRLCMAC, LOGL_NOTICE, "Timer expired in unknown mode: %u \n", tbf->fT); |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 258 | } |
| 259 | } |
| 260 | |
| 261 | static void tbf_gsm_timer_start(struct gprs_rlcmac_tbf *tbf, unsigned int fT, |
| 262 | int frames) |
| 263 | { |
| 264 | if (osmo_gsm_timer_pending(&tbf->gsm_timer)) |
Ivan Kluchnikov | 856221f | 2012-06-15 09:31:29 +0400 | [diff] [blame] | 265 | LOGP(DRLCMAC, LOGL_NOTICE, "Starting TBF timer %u while old timer %u pending \n", fT, tbf->fT); |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 266 | tbf->fT = fT; |
| 267 | tbf->num_fT_exp = 0; |
| 268 | |
| 269 | /* FIXME: we should do this only once ? */ |
| 270 | tbf->gsm_timer.data = tbf; |
| 271 | tbf->gsm_timer.cb = &tbf_gsm_timer_cb; |
| 272 | |
| 273 | osmo_gsm_timer_schedule(&tbf->gsm_timer, frames); |
| 274 | } |
| 275 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 276 | eine stop-funktion, auch im tbf_free aufrufen |
| 277 | |
| 278 | #endif |
| 279 | |
| 280 | #if 0 |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 281 | void gprs_rlcmac_enqueue_block(bitvec *block, int len) |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame] | 282 | { |
| 283 | struct msgb *msg = msgb_alloc(len, "rlcmac_dl"); |
| 284 | bitvec_pack(block, msgb_put(msg, len)); |
| 285 | msgb_enqueue(&block_queue, msg); |
| 286 | } |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 287 | #endif |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame] | 288 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 289 | /* received RLC/MAC block from L1 */ |
| 290 | int gprs_rlcmac_rcv_block(uint8_t *data, uint8_t len, uint32_t fn) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 291 | { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 292 | unsigned payload = data[0] >> 6; |
| 293 | bitvec *block; |
| 294 | int rc = 0; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 295 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 296 | switch (payload) { |
| 297 | case GPRS_RLCMAC_DATA_BLOCK: |
| 298 | rc = gprs_rlcmac_rcv_data_block_acknowledged(data, len); |
| 299 | break; |
| 300 | case GPRS_RLCMAC_CONTROL_BLOCK: |
| 301 | block = bitvec_alloc(len); |
| 302 | if (!block) |
| 303 | return -ENOMEM; |
| 304 | bitvec_unpack(block, data); |
| 305 | rc = gprs_rlcmac_rcv_control_block(block, fn); |
| 306 | bitvec_free(block); |
| 307 | break; |
| 308 | case GPRS_RLCMAC_CONTROL_BLOCK_OPT: |
| 309 | LOGP(DRLCMAC, LOGL_NOTICE, "GPRS_RLCMAC_CONTROL_BLOCK_OPT block payload is not supported.\n"); |
| 310 | default: |
| 311 | LOGP(DRLCMAC, LOGL_NOTICE, "Unknown RLCMAC block payload.\n"); |
| 312 | rc = -EINVAL; |
| 313 | } |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 314 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 315 | return rc; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 316 | } |
| 317 | |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 318 | // GSM 04.08 9.1.18 Immediate assignment |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 319 | int write_immediate_assignment(bitvec * dest, uint8_t downlink, uint8_t ra, |
| 320 | uint32_t fn, uint8_t ta, uint16_t arfcn, uint8_t ts, uint8_t tsc, |
| 321 | uint8_t tfi, uint8_t usf, uint32_t tlli, |
| 322 | uint8_t polling, uint32_t poll_fn) |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 323 | { |
| 324 | unsigned wp = 0; |
| 325 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 326 | bitvec_write_field(dest, wp,0x0,4); // Skip Indicator |
| 327 | bitvec_write_field(dest, wp,0x6,4); // Protocol Discriminator |
| 328 | bitvec_write_field(dest, wp,0x3F,8); // Immediate Assignment Message Type |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 329 | |
| 330 | // 10.5.2.25b Dedicated mode or TBF |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 331 | bitvec_write_field(dest, wp,0x0,1); // spare |
| 332 | bitvec_write_field(dest, wp,0x0,1); // TMA : Two-message assignment: No meaning |
| 333 | bitvec_write_field(dest, wp,downlink,1); // Downlink : Downlink assignment to mobile in packet idle mode |
| 334 | bitvec_write_field(dest, wp,0x1,1); // T/D : TBF or dedicated mode: this message assigns a Temporary Block Flow (TBF). |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 335 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 336 | bitvec_write_field(dest, wp,0x0,4); // Page Mode |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 337 | |
| 338 | // GSM 04.08 10.5.2.25a Packet Channel Description |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 339 | bitvec_write_field(dest, wp,0x1,5); // Channel type |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame] | 340 | bitvec_write_field(dest, wp,ts,3); // TN |
| 341 | bitvec_write_field(dest, wp,tsc,3); // TSC |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 342 | bitvec_write_field(dest, wp,0x0,3); // non-hopping RF channel configuraion |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame] | 343 | bitvec_write_field(dest, wp,arfcn,10); // ARFCN |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 344 | |
| 345 | //10.5.2.30 Request Reference |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 346 | bitvec_write_field(dest, wp,ra,8); // RA |
| 347 | bitvec_write_field(dest, wp,(fn / (26 * 51)) % 32,5); // T1' |
| 348 | bitvec_write_field(dest, wp,fn % 51,6); // T3 |
| 349 | bitvec_write_field(dest, wp,fn % 26,5); // T2 |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 350 | |
| 351 | // 10.5.2.40 Timing Advance |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 352 | bitvec_write_field(dest, wp,0x0,2); // spare |
| 353 | bitvec_write_field(dest, wp,ta,6); // Timing Advance value |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 354 | |
| 355 | // No mobile allocation in non-hopping systems. |
| 356 | // A zero-length LV. Just write L=0. |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 357 | bitvec_write_field(dest, wp,0,8); |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 358 | |
| 359 | if (downlink) |
| 360 | { |
| 361 | // GSM 04.08 10.5.2.16 IA Rest Octets |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 362 | bitvec_write_field(dest, wp, 3, 2); // "HH" |
| 363 | bitvec_write_field(dest, wp, 1, 2); // "01" Packet Downlink Assignment |
| 364 | bitvec_write_field(dest, wp,tlli,32); // TLLI |
| 365 | bitvec_write_field(dest, wp,0x1,1); // switch TFI : on |
| 366 | bitvec_write_field(dest, wp,tfi,5); // TFI |
| 367 | bitvec_write_field(dest, wp,0x0,1); // RLC acknowledged mode |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 368 | bitvec_write_field(dest, wp,0x0,1); // ALPHA = not present |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 369 | bitvec_write_field(dest, wp,0x0,5); // GAMMA power control parameter |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 370 | bitvec_write_field(dest, wp,polling,1); // Polling Bit |
| 371 | bitvec_write_field(dest, wp,!polling,1); // TA_VALID ??? |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 372 | bitvec_write_field(dest, wp,0x1,1); // switch TIMING_ADVANCE_INDEX = on |
| 373 | bitvec_write_field(dest, wp,0x0,4); // TIMING_ADVANCE_INDEX |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 374 | if (polling) { |
| 375 | bitvec_write_field(dest, wp,0x1,1); // TBF Starting TIME present |
| 376 | bitvec_write_field(dest, wp,(poll_fn / (26 * 51)) % 32,5); // T1' |
| 377 | bitvec_write_field(dest, wp,poll_fn % 51,6); // T3 |
| 378 | bitvec_write_field(dest, wp,poll_fn % 26,5); // T2 |
| 379 | } else { |
| 380 | bitvec_write_field(dest, wp,0x0,1); // TBF Starting TIME present |
| 381 | } |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 382 | bitvec_write_field(dest, wp,0x0,1); // P0 not present |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 383 | // bitvec_write_field(dest, wp,0x1,1); // P0 not present |
| 384 | // bitvec_write_field(dest, wp,0xb,4); |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 385 | } |
| 386 | else |
| 387 | { |
Andreas Eversberg | dfa563c | 2012-07-06 08:13:59 +0200 | [diff] [blame] | 388 | struct gprs_rlcmac_bts *bts = gprs_rlcmac_bts; |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 389 | // GMS 04.08 10.5.2.37b 10.5.2.16 |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 390 | bitvec_write_field(dest, wp, 3, 2); // "HH" |
| 391 | bitvec_write_field(dest, wp, 0, 2); // "0" Packet Uplink Assignment |
| 392 | bitvec_write_field(dest, wp, 1, 1); // Block Allocation : Not Single Block Allocation |
| 393 | bitvec_write_field(dest, wp, tfi, 5); // TFI_ASSIGNMENT Temporary Flow Identity |
| 394 | bitvec_write_field(dest, wp, 0, 1); // POLLING |
| 395 | bitvec_write_field(dest, wp, 0, 1); // ALLOCATION_TYPE: dynamic |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 396 | bitvec_write_field(dest, wp, usf, 3); // USF |
Andreas Eversberg | 0553408 | 2012-06-24 11:46:49 +0200 | [diff] [blame] | 397 | bitvec_write_field(dest, wp, 0, 1); // USF_GRANULARITY |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 398 | bitvec_write_field(dest, wp, 0 , 1); // "0" power control: Not Present |
Andreas Eversberg | dfa563c | 2012-07-06 08:13:59 +0200 | [diff] [blame] | 399 | bitvec_write_field(dest, wp, bts->initial_cs-1, 2); // CHANNEL_CODING_COMMAND |
| 400 | bitvec_write_field(dest, wp, 1, 1); // TLLI_BLOCK_CHANNEL_CODING |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 401 | bitvec_write_field(dest, wp, 1 , 1); // "1" Alpha : Present |
| 402 | bitvec_write_field(dest, wp, 0, 4); // Alpha |
| 403 | bitvec_write_field(dest, wp, 0, 5); // Gamma |
| 404 | bitvec_write_field(dest, wp, 0, 1); // TIMING_ADVANCE_INDEX_FLAG |
| 405 | bitvec_write_field(dest, wp, 0, 1); // TBF_STARTING_TIME_FLAG |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 406 | } |
| 407 | |
| 408 | if (wp%8) |
| 409 | return wp/8+1; |
| 410 | else |
| 411 | return wp/8; |
| 412 | } |
| 413 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 414 | /* generate uplink assignment */ |
| 415 | void write_packet_uplink_assignment(bitvec * dest, uint8_t old_tfi, |
| 416 | uint8_t old_downlink, uint32_t tlli, uint8_t use_tlli, uint8_t new_tfi, |
| 417 | uint8_t usf, uint16_t arfcn, uint8_t tn, uint8_t ta, uint8_t tsc, |
| 418 | uint8_t poll) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 419 | { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 420 | // TODO We should use our implementation of encode RLC/MAC Control messages. |
Andreas Eversberg | dfa563c | 2012-07-06 08:13:59 +0200 | [diff] [blame] | 421 | struct gprs_rlcmac_bts *bts = gprs_rlcmac_bts; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 422 | unsigned wp = 0; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 423 | int i; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 424 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 425 | bitvec_write_field(dest, wp,0x1,2); // Payload Type |
| 426 | bitvec_write_field(dest, wp,0x0,2); // Uplink block with TDMA framenumber (N+13) |
| 427 | bitvec_write_field(dest, wp,poll,1); // Suppl/Polling Bit |
| 428 | bitvec_write_field(dest, wp,0x0,3); // Uplink state flag |
| 429 | bitvec_write_field(dest, wp,0xa,6); // MESSAGE TYPE |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 430 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 431 | bitvec_write_field(dest, wp,0x0,2); // Page Mode |
Ivan Kluchnikov | bceb3fb | 2012-06-05 16:56:27 +0400 | [diff] [blame] | 432 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 433 | bitvec_write_field(dest, wp,0x0,1); // switch PERSIST_LEVEL: off |
| 434 | if (use_tlli) { |
| 435 | bitvec_write_field(dest, wp,0x2,2); // switch TLLI : on |
| 436 | bitvec_write_field(dest, wp,tlli,32); // TLLI |
| 437 | } else { |
| 438 | bitvec_write_field(dest, wp,0x0,1); // switch TFI : on |
| 439 | bitvec_write_field(dest, wp,old_downlink,1); // 0=UPLINK TFI, 1=DL TFI |
| 440 | bitvec_write_field(dest, wp,old_tfi,5); // TFI |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 441 | } |
Ivan Kluchnikov | b2b8100 | 2012-06-04 21:57:02 +0400 | [diff] [blame] | 442 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 443 | bitvec_write_field(dest, wp,0x0,1); // Message escape |
Andreas Eversberg | dfa563c | 2012-07-06 08:13:59 +0200 | [diff] [blame] | 444 | bitvec_write_field(dest, wp, bts->initial_cs-1, 2); // CHANNEL_CODING_COMMAND |
| 445 | bitvec_write_field(dest, wp,0x1,1); // TLLI_BLOCK_CHANNEL_CODING |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 446 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 447 | bitvec_write_field(dest, wp,0x1,1); // switch TIMING_ADVANCE_VALUE = on |
| 448 | bitvec_write_field(dest, wp,ta,6); // TIMING_ADVANCE_VALUE |
| 449 | bitvec_write_field(dest, wp,0x0,1); // switch TIMING_ADVANCE_INDEX = off |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 450 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 451 | #if 1 |
| 452 | bitvec_write_field(dest, wp,0x1,1); // Frequency Parameters information elements = present |
Andreas Eversberg | dfa563c | 2012-07-06 08:13:59 +0200 | [diff] [blame] | 453 | bitvec_write_field(dest, wp,tsc,3); // Training Sequence Code (TSC) |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 454 | bitvec_write_field(dest, wp,0x0,2); // ARFCN = present |
| 455 | bitvec_write_field(dest, wp,arfcn,10); // ARFCN |
| 456 | #else |
| 457 | bitvec_write_field(dest, wp,0x0,1); // Frequency Parameters = off |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 458 | #endif |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 459 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 460 | bitvec_write_field(dest, wp,0x1,2); // Dynamic Allocation |
Ivan Kluchnikov | e359423 | 2012-06-07 01:12:29 +0400 | [diff] [blame] | 461 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 462 | bitvec_write_field(dest, wp,0x0,1); // Extended Dynamic Allocation = off |
| 463 | bitvec_write_field(dest, wp,0x0,1); // P0 = off |
Ivan Kluchnikov | e359423 | 2012-06-07 01:12:29 +0400 | [diff] [blame] | 464 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 465 | bitvec_write_field(dest, wp,0x0,1); // USF_GRANULARITY |
| 466 | bitvec_write_field(dest, wp,0x1,1); // switch TFI : on |
| 467 | bitvec_write_field(dest, wp,new_tfi,5);// TFI |
| 468 | |
| 469 | bitvec_write_field(dest, wp,0x0,1); // |
| 470 | bitvec_write_field(dest, wp,0x0,1); // TBF Starting Time = off |
| 471 | bitvec_write_field(dest, wp,0x0,1); // Timeslot Allocation |
| 472 | |
| 473 | for (i = 0; i < 8; i++) { |
| 474 | if (tn == i) { |
| 475 | bitvec_write_field(dest, wp,0x1,1); // USF_TN(i): on |
| 476 | bitvec_write_field(dest, wp,usf,3); // USF_TN(i) |
| 477 | } else |
| 478 | bitvec_write_field(dest, wp,0x0,1); // USF_TN(i): off |
Ivan Kluchnikov | e359423 | 2012-06-07 01:12:29 +0400 | [diff] [blame] | 479 | } |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 480 | // bitvec_write_field(dest, wp,0x0,1); // Measurement Mapping struct not present |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 481 | } |
| 482 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 483 | /* generate downlink assignment */ |
| 484 | void write_packet_downlink_assignment(bitvec * dest, uint8_t old_tfi, |
| 485 | uint8_t old_downlink, uint8_t new_tfi, uint16_t arfcn, |
| 486 | uint8_t tn, uint8_t ta, uint8_t tsc, uint8_t poll) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 487 | { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 488 | // TODO We should use our implementation of encode RLC/MAC Control messages. |
| 489 | unsigned wp = 0; |
| 490 | int i; |
| 491 | bitvec_write_field(dest, wp,0x1,2); // Payload Type |
| 492 | bitvec_write_field(dest, wp,0x0,2); // Uplink block with TDMA framenumber (FN+13) |
| 493 | bitvec_write_field(dest, wp,poll,1); // Suppl/Polling Bit |
| 494 | bitvec_write_field(dest, wp,0x0,3); // Uplink state flag |
| 495 | bitvec_write_field(dest, wp,0x2,6); // MESSAGE TYPE |
| 496 | bitvec_write_field(dest, wp,0x0,2); // Page Mode |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 497 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 498 | bitvec_write_field(dest, wp,0x0,1); // switch PERSIST_LEVEL: off |
| 499 | bitvec_write_field(dest, wp,0x0,1); // switch TFI : on |
| 500 | bitvec_write_field(dest, wp,old_downlink,1); // 0=UPLINK TFI, 1=DL TFI |
| 501 | bitvec_write_field(dest, wp,old_tfi,5); // TFI |
Ivan Kluchnikov | e359423 | 2012-06-07 01:12:29 +0400 | [diff] [blame] | 502 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 503 | bitvec_write_field(dest, wp,0x0,1); // Message escape |
| 504 | bitvec_write_field(dest, wp,0x0,2); // Medium Access Method: Dynamic Allocation |
| 505 | bitvec_write_field(dest, wp,0x0,1); // RLC acknowledged mode |
| 506 | |
| 507 | bitvec_write_field(dest, wp,old_downlink,1); // the network establishes no new downlink TBF for the mobile station |
| 508 | bitvec_write_field(dest, wp,0x80 >> tn,8); // timeslot(s) |
| 509 | |
| 510 | bitvec_write_field(dest, wp,0x1,1); // switch TIMING_ADVANCE_VALUE = on |
| 511 | bitvec_write_field(dest, wp,ta,6); // TIMING_ADVANCE_VALUE |
| 512 | bitvec_write_field(dest, wp,0x0,1); // switch TIMING_ADVANCE_INDEX = off |
| 513 | |
| 514 | bitvec_write_field(dest, wp,0x0,1); // switch POWER CONTROL = off |
| 515 | bitvec_write_field(dest, wp,0x1,1); // Frequency Parameters information elements = present |
| 516 | |
| 517 | bitvec_write_field(dest, wp,tsc,3); // Training Sequence Code (TSC) = 2 |
| 518 | bitvec_write_field(dest, wp,0x0,2); // ARFCN = present |
| 519 | bitvec_write_field(dest, wp,arfcn,10); // ARFCN |
| 520 | |
| 521 | bitvec_write_field(dest, wp,0x1,1); // switch TFI : on |
| 522 | bitvec_write_field(dest, wp,new_tfi,5);// TFI |
| 523 | |
| 524 | bitvec_write_field(dest, wp,0x1,1); // Power Control Parameters IE = present |
| 525 | bitvec_write_field(dest, wp,0x0,4); // ALPHA power control parameter |
| 526 | for (i = 0; i < 8; i++) |
| 527 | bitvec_write_field(dest, wp,(tn == i),1); // switch GAMMA_TN[i] = on or off |
| 528 | bitvec_write_field(dest, wp,0x0,5); // GAMMA_TN[tn] |
| 529 | |
| 530 | bitvec_write_field(dest, wp,0x0,1); // TBF Starting TIME IE not present |
| 531 | bitvec_write_field(dest, wp,0x0,1); // Measurement Mapping struct not present |
| 532 | bitvec_write_field(dest, wp,0x0,1); |
| 533 | } |
| 534 | |
| 535 | /* generate uplink ack */ |
| 536 | void write_packet_uplink_ack(bitvec * dest, struct gprs_rlcmac_tbf *tbf, |
| 537 | uint8_t final) |
| 538 | { |
| 539 | char show_v_n[65]; |
| 540 | |
| 541 | // TODO We should use our implementation of encode RLC/MAC Control messages. |
| 542 | unsigned wp = 0; |
| 543 | uint16_t i, bbn; |
| 544 | uint16_t mod_sns_half = (tbf->sns >> 1) - 1; |
| 545 | char bit; |
| 546 | |
| 547 | LOGP(DRLCMACUL, LOGL_DEBUG, "Sending Ack/Nack for TBF=%d " |
| 548 | "(final=%d)\n", tbf->tfi, final); |
| 549 | |
| 550 | bitvec_write_field(dest, wp,0x1,2); // payload |
| 551 | bitvec_write_field(dest, wp,0x0,2); // Uplink block with TDMA framenumber (N+13) |
| 552 | bitvec_write_field(dest, wp,final,1); // Suppl/Polling Bit |
| 553 | bitvec_write_field(dest, wp,0x0,3); // Uplink state flag |
| 554 | |
| 555 | //bitvec_write_field(dest, wp,0x0,1); // Reduced block sequence number |
| 556 | //bitvec_write_field(dest, wp,BSN+6,5); // Radio transaction identifier |
| 557 | //bitvec_write_field(dest, wp,0x1,1); // Final segment |
| 558 | //bitvec_write_field(dest, wp,0x1,1); // Address control |
| 559 | |
| 560 | //bitvec_write_field(dest, wp,0x0,2); // Power reduction: 0 |
| 561 | //bitvec_write_field(dest, wp,TFI,5); // Temporary flow identifier |
| 562 | //bitvec_write_field(dest, wp,0x1,1); // Direction |
| 563 | |
| 564 | bitvec_write_field(dest, wp,0x09,6); // MESSAGE TYPE |
| 565 | bitvec_write_field(dest, wp,0x0,2); // Page Mode |
| 566 | |
| 567 | bitvec_write_field(dest, wp,0x0,2); |
| 568 | bitvec_write_field(dest, wp,tbf->tfi,5); // Uplink TFI |
| 569 | bitvec_write_field(dest, wp,0x0,1); |
| 570 | |
| 571 | bitvec_write_field(dest, wp,0x0,2); // CS1 |
| 572 | bitvec_write_field(dest, wp,final,1); // FINAL_ACK_INDICATION |
| 573 | bitvec_write_field(dest, wp,tbf->dir.ul.v_r,7); // STARTING_SEQUENCE_NUMBER |
| 574 | // RECEIVE_BLOCK_BITMAP |
| 575 | for (i = 0, bbn = (tbf->dir.ul.v_r - 64) & mod_sns_half; i < 64; |
| 576 | i++, bbn = (bbn + 1) & mod_sns_half) { |
| 577 | bit = tbf->dir.ul.v_n[bbn]; |
| 578 | if (bit == 0) |
| 579 | bit = ' '; |
| 580 | show_v_n[i] = bit; |
| 581 | bitvec_write_field(dest, wp,(bit == 'R'),1); |
Ivan Kluchnikov | e359423 | 2012-06-07 01:12:29 +0400 | [diff] [blame] | 582 | } |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 583 | show_v_n[64] = '\0'; |
| 584 | LOGP(DRLCMACUL, LOGL_DEBUG, "- V(N): \"%s\" R=Received " |
| 585 | "N=Not-Received\n", show_v_n); |
| 586 | bitvec_write_field(dest, wp,0x1,1); // CONTENTION_RESOLUTION_TLLI = present |
| 587 | bitvec_write_field(dest, wp,tbf->tlli,8*4); |
| 588 | bitvec_write_field(dest, wp,0x00,4); //spare |
| 589 | bitvec_write_field(dest, wp,0x5,4); //0101 |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 590 | } |
| 591 | |
| 592 | /* Send Uplink unit-data to SGSN. */ |
Andreas Eversberg | 3e372d5 | 2012-07-06 09:28:15 +0200 | [diff] [blame] | 593 | int gprs_rlcmac_tx_ul_ud(gprs_rlcmac_tbf *tbf) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 594 | { |
| 595 | const uint8_t qos_profile = QOS_PROFILE; |
| 596 | struct msgb *llc_pdu; |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 597 | unsigned msg_len = NS_HDR_LEN + BSSGP_HDR_LEN + tbf->llc_index; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 598 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 599 | LOGP(DBSSGP, LOGL_NOTICE, "TX: [PCU -> SGSN ] TFI: %u TLLI: 0x%08x DataLen: %u\n", tbf->tfi, tbf->tlli, tbf->llc_index); |
Andreas Eversberg | 3e372d5 | 2012-07-06 09:28:15 +0200 | [diff] [blame] | 600 | if (!bctx) { |
| 601 | LOGP(DBSSGP, LOGL_ERROR, "No bctx\n"); |
| 602 | return -EIO; |
| 603 | } |
Ivan Kluchnikov | b2b8100 | 2012-06-04 21:57:02 +0400 | [diff] [blame] | 604 | //LOGP(DBSSGP, LOGL_NOTICE, " Data = "); |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 605 | //for (unsigned i = 0; i < tbf->llc_index; i++) |
| 606 | // LOGPC(DBSSGP, LOGL_NOTICE, "%02x ", tbf->llc_frame[i]); |
Ivan Kluchnikov | c320d86 | 2012-03-18 15:04:48 +0400 | [diff] [blame] | 607 | |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 608 | llc_pdu = msgb_alloc_headroom(msg_len, msg_len,"llc_pdu"); |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 609 | msgb_tvlv_push(llc_pdu, BSSGP_IE_LLC_PDU, sizeof(uint8_t)*tbf->llc_index, tbf->llc_frame); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 610 | bssgp_tx_ul_ud(bctx, tbf->tlli, &qos_profile, llc_pdu); |
Andreas Eversberg | 3e372d5 | 2012-07-06 09:28:15 +0200 | [diff] [blame] | 611 | |
| 612 | return 0; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 613 | } |
| 614 | |