Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1 | /* GSM Channel allocation routines |
| 2 | * |
| 3 | * (C) 2008 by Harald Welte <laforge@gnumonks.org> |
| 4 | * (C) 2008, 2009 by Holger Hans Peter Freyther <zecke@selfish.org> |
| 5 | * |
| 6 | * All Rights Reserved |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
Harald Welte | 0e3e88e | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 9 | * it under the terms of the GNU Affero General Public License as published by |
| 10 | * the Free Software Foundation; either version 3 of the License, or |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
Harald Welte | 0e3e88e | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 16 | * GNU Affero General Public License for more details. |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 17 | * |
Harald Welte | 0e3e88e | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 18 | * You should have received a copy of the GNU Affero General Public License |
| 19 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 20 | * |
| 21 | */ |
| 22 | |
| 23 | #include <stdio.h> |
| 24 | #include <stdlib.h> |
| 25 | #include <string.h> |
| 26 | #include <errno.h> |
| 27 | |
Holger Hans Peter Freyther | d300106 | 2010-12-22 18:13:00 +0100 | [diff] [blame] | 28 | #include <openbsc/gsm_subscriber.h> |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 29 | #include <openbsc/chan_alloc.h> |
| 30 | #include <openbsc/abis_nm.h> |
| 31 | #include <openbsc/abis_rsl.h> |
| 32 | #include <openbsc/debug.h> |
| 33 | #include <openbsc/signal.h> |
| 34 | |
Pablo Neira Ayuso | dd5fff4 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 35 | #include <osmocom/core/talloc.h> |
Holger Hans Peter Freyther | c08f6f0 | 2010-06-22 12:11:59 +0800 | [diff] [blame] | 36 | |
Harald Welte | edc7b2f | 2009-12-24 10:10:16 +0100 | [diff] [blame] | 37 | static int ts_is_usable(struct gsm_bts_trx_ts *ts) |
| 38 | { |
| 39 | /* FIXME: How does this behave for BS-11 ? */ |
| 40 | if (is_ipaccess_bts(ts->trx->bts)) { |
Harald Welte | 69f6f81 | 2011-05-30 12:07:53 +0200 | [diff] [blame] | 41 | if (!nm_is_running(&ts->mo.nm_state)) |
Harald Welte | edc7b2f | 2009-12-24 10:10:16 +0100 | [diff] [blame] | 42 | return 0; |
| 43 | } |
| 44 | |
| 45 | return 1; |
| 46 | } |
| 47 | |
Harald Welte (local) | 43db2bf | 2009-12-28 16:36:28 +0100 | [diff] [blame] | 48 | int trx_is_usable(struct gsm_bts_trx *trx) |
Harald Welte | edc7b2f | 2009-12-24 10:10:16 +0100 | [diff] [blame] | 49 | { |
| 50 | /* FIXME: How does this behave for BS-11 ? */ |
| 51 | if (is_ipaccess_bts(trx->bts)) { |
Harald Welte | 69f6f81 | 2011-05-30 12:07:53 +0200 | [diff] [blame] | 52 | if (!nm_is_running(&trx->mo.nm_state) || |
| 53 | !nm_is_running(&trx->bb_transc.mo.nm_state)) |
Harald Welte | edc7b2f | 2009-12-24 10:10:16 +0100 | [diff] [blame] | 54 | return 0; |
| 55 | } |
| 56 | |
| 57 | return 1; |
| 58 | } |
| 59 | |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 60 | struct gsm_bts_trx_ts *ts_c0_alloc(struct gsm_bts *bts, |
| 61 | enum gsm_phys_chan_config pchan) |
| 62 | { |
Harald Welte | e712a5f | 2009-06-21 16:17:15 +0200 | [diff] [blame] | 63 | struct gsm_bts_trx *trx = bts->c0; |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 64 | struct gsm_bts_trx_ts *ts = &trx->ts[0]; |
| 65 | |
| 66 | if (pchan != GSM_PCHAN_CCCH && |
| 67 | pchan != GSM_PCHAN_CCCH_SDCCH4) |
| 68 | return NULL; |
| 69 | |
| 70 | if (ts->pchan != GSM_PCHAN_NONE) |
| 71 | return NULL; |
| 72 | |
| 73 | ts->pchan = pchan; |
| 74 | |
| 75 | return ts; |
| 76 | } |
| 77 | |
Harald Welte | 0374084 | 2009-06-10 23:11:52 +0800 | [diff] [blame] | 78 | /* Allocate a physical channel (TS) */ |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 79 | struct gsm_bts_trx_ts *ts_alloc(struct gsm_bts *bts, |
| 80 | enum gsm_phys_chan_config pchan) |
| 81 | { |
Harald Welte | 351ff12 | 2009-08-10 13:25:55 +0200 | [diff] [blame] | 82 | int j; |
| 83 | struct gsm_bts_trx *trx; |
| 84 | |
| 85 | llist_for_each_entry(trx, &bts->trx_list, list) { |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 86 | int from, to; |
| 87 | |
Harald Welte | edc7b2f | 2009-12-24 10:10:16 +0100 | [diff] [blame] | 88 | if (!trx_is_usable(trx)) |
| 89 | continue; |
| 90 | |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 91 | /* the following constraints are pure policy, |
| 92 | * no requirement to put this restriction in place */ |
Harald Welte | 3a9c2c0 | 2009-07-29 16:46:37 +0200 | [diff] [blame] | 93 | if (trx == bts->c0) { |
| 94 | /* On the first TRX we run one CCCH and one SDCCH8 */ |
| 95 | switch (pchan) { |
| 96 | case GSM_PCHAN_CCCH: |
| 97 | case GSM_PCHAN_CCCH_SDCCH4: |
| 98 | from = 0; to = 0; |
| 99 | break; |
Harald Welte | 3a9c2c0 | 2009-07-29 16:46:37 +0200 | [diff] [blame] | 100 | case GSM_PCHAN_TCH_F: |
| 101 | case GSM_PCHAN_TCH_H: |
Harald Welte | 7f863f5 | 2009-08-09 22:01:26 +0200 | [diff] [blame] | 102 | from = 1; to = 7; |
Harald Welte | 3a9c2c0 | 2009-07-29 16:46:37 +0200 | [diff] [blame] | 103 | break; |
Harald Welte | 7f863f5 | 2009-08-09 22:01:26 +0200 | [diff] [blame] | 104 | case GSM_PCHAN_SDCCH8_SACCH8C: |
Harald Welte | 3a9c2c0 | 2009-07-29 16:46:37 +0200 | [diff] [blame] | 105 | default: |
| 106 | return NULL; |
| 107 | } |
| 108 | } else { |
| 109 | /* Every secondary TRX is configured for TCH/F |
| 110 | * and TCH/H only */ |
| 111 | switch (pchan) { |
Harald Welte | 7f863f5 | 2009-08-09 22:01:26 +0200 | [diff] [blame] | 112 | case GSM_PCHAN_SDCCH8_SACCH8C: |
| 113 | from = 1; to = 1; |
Harald Welte | 3a9c2c0 | 2009-07-29 16:46:37 +0200 | [diff] [blame] | 114 | case GSM_PCHAN_TCH_F: |
| 115 | case GSM_PCHAN_TCH_H: |
Harald Welte | 7f863f5 | 2009-08-09 22:01:26 +0200 | [diff] [blame] | 116 | from = 1; to = 7; |
Harald Welte | 3a9c2c0 | 2009-07-29 16:46:37 +0200 | [diff] [blame] | 117 | break; |
| 118 | default: |
| 119 | return NULL; |
| 120 | } |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 121 | } |
| 122 | |
| 123 | for (j = from; j <= to; j++) { |
| 124 | struct gsm_bts_trx_ts *ts = &trx->ts[j]; |
Harald Welte | edc7b2f | 2009-12-24 10:10:16 +0100 | [diff] [blame] | 125 | |
| 126 | if (!ts_is_usable(ts)) |
| 127 | continue; |
| 128 | |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 129 | if (ts->pchan == GSM_PCHAN_NONE) { |
| 130 | ts->pchan = pchan; |
| 131 | /* set channel attribute on OML */ |
Harald Welte | 35cd5e9 | 2009-08-10 12:21:22 +0200 | [diff] [blame] | 132 | abis_nm_set_channel_attr(ts, abis_nm_chcomb4pchan(pchan)); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 133 | return ts; |
| 134 | } |
| 135 | } |
| 136 | } |
| 137 | return NULL; |
| 138 | } |
| 139 | |
| 140 | /* Free a physical channel (TS) */ |
| 141 | void ts_free(struct gsm_bts_trx_ts *ts) |
| 142 | { |
| 143 | ts->pchan = GSM_PCHAN_NONE; |
| 144 | } |
| 145 | |
Holger Hans Peter Freyther | 7eb8a9a | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 146 | static const uint8_t subslots_per_pchan[] = { |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 147 | [GSM_PCHAN_NONE] = 0, |
| 148 | [GSM_PCHAN_CCCH] = 0, |
| 149 | [GSM_PCHAN_CCCH_SDCCH4] = 4, |
| 150 | [GSM_PCHAN_TCH_F] = 1, |
| 151 | [GSM_PCHAN_TCH_H] = 2, |
Harald Welte | 0374084 | 2009-06-10 23:11:52 +0800 | [diff] [blame] | 152 | [GSM_PCHAN_SDCCH8_SACCH8C] = 8, |
Harald Welte | fe96f38 | 2009-12-22 13:09:29 +0100 | [diff] [blame] | 153 | /* FIXME: what about dynamic TCH_F_TCH_H ? */ |
Harald Welte | 8f72544 | 2010-03-28 15:58:03 +0800 | [diff] [blame] | 154 | [GSM_PCHAN_TCH_F_PDCH] = 1, |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 155 | }; |
| 156 | |
| 157 | static struct gsm_lchan * |
Harald Welte | ceb3c04 | 2009-08-10 13:46:55 +0200 | [diff] [blame] | 158 | _lc_find_trx(struct gsm_bts_trx *trx, enum gsm_phys_chan_config pchan) |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 159 | { |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 160 | struct gsm_bts_trx_ts *ts; |
Harald Welte | 351ff12 | 2009-08-10 13:25:55 +0200 | [diff] [blame] | 161 | int j, ss; |
| 162 | |
Harald Welte | edc7b2f | 2009-12-24 10:10:16 +0100 | [diff] [blame] | 163 | if (!trx_is_usable(trx)) |
| 164 | return NULL; |
| 165 | |
Harald Welte | ceb3c04 | 2009-08-10 13:46:55 +0200 | [diff] [blame] | 166 | for (j = 0; j < 8; j++) { |
| 167 | ts = &trx->ts[j]; |
Harald Welte | edc7b2f | 2009-12-24 10:10:16 +0100 | [diff] [blame] | 168 | if (!ts_is_usable(ts)) |
| 169 | continue; |
Harald Welte | 8f72544 | 2010-03-28 15:58:03 +0800 | [diff] [blame] | 170 | /* ip.access dynamic TCH/F + PDCH combination */ |
| 171 | if (ts->pchan == GSM_PCHAN_TCH_F_PDCH && |
| 172 | pchan == GSM_PCHAN_TCH_F) { |
| 173 | /* we can only consider such a dynamic channel |
| 174 | * if the PDCH is currently inactive */ |
| 175 | if (ts->flags & TS_F_PDCH_MODE) |
| 176 | continue; |
| 177 | } else if (ts->pchan != pchan) |
Harald Welte | ceb3c04 | 2009-08-10 13:46:55 +0200 | [diff] [blame] | 178 | continue; |
| 179 | /* check if all sub-slots are allocated yet */ |
| 180 | for (ss = 0; ss < subslots_per_pchan[pchan]; ss++) { |
| 181 | struct gsm_lchan *lc = &ts->lchan[ss]; |
Harald Welte (local) | c3be50c | 2009-12-27 18:12:29 +0100 | [diff] [blame] | 182 | if (lc->type == GSM_LCHAN_NONE && |
| 183 | lc->state == LCHAN_S_NONE) |
Harald Welte | ceb3c04 | 2009-08-10 13:46:55 +0200 | [diff] [blame] | 184 | return lc; |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 185 | } |
| 186 | } |
Harald Welte | 8f72544 | 2010-03-28 15:58:03 +0800 | [diff] [blame] | 187 | |
Harald Welte | ceb3c04 | 2009-08-10 13:46:55 +0200 | [diff] [blame] | 188 | return NULL; |
| 189 | } |
| 190 | |
| 191 | static struct gsm_lchan * |
| 192 | _lc_find_bts(struct gsm_bts *bts, enum gsm_phys_chan_config pchan) |
| 193 | { |
| 194 | struct gsm_bts_trx *trx; |
| 195 | struct gsm_bts_trx_ts *ts; |
| 196 | struct gsm_lchan *lc; |
| 197 | |
| 198 | if (bts->chan_alloc_reverse) { |
| 199 | llist_for_each_entry_reverse(trx, &bts->trx_list, list) { |
| 200 | lc = _lc_find_trx(trx, pchan); |
| 201 | if (lc) |
| 202 | return lc; |
| 203 | } |
| 204 | } else { |
| 205 | llist_for_each_entry(trx, &bts->trx_list, list) { |
| 206 | lc = _lc_find_trx(trx, pchan); |
| 207 | if (lc) |
| 208 | return lc; |
| 209 | } |
| 210 | } |
| 211 | |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 212 | /* we cannot allocate more of these */ |
| 213 | if (pchan == GSM_PCHAN_CCCH_SDCCH4) |
| 214 | return NULL; |
| 215 | |
| 216 | /* if we've reached here, we need to allocate a new physical |
| 217 | * channel for the logical channel type requested */ |
| 218 | ts = ts_alloc(bts, pchan); |
| 219 | if (!ts) { |
| 220 | /* no more radio resources */ |
| 221 | return NULL; |
| 222 | } |
| 223 | return &ts->lchan[0]; |
| 224 | } |
| 225 | |
| 226 | /* Allocate a logical channel */ |
Holger Hans Peter Freyther | db39203 | 2010-09-06 08:58:42 +0800 | [diff] [blame] | 227 | struct gsm_lchan *lchan_alloc(struct gsm_bts *bts, enum gsm_chan_t type, |
| 228 | int allow_bigger) |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 229 | { |
| 230 | struct gsm_lchan *lchan = NULL; |
Harald Welte | af86c0f | 2009-08-10 14:44:24 +0200 | [diff] [blame] | 231 | enum gsm_phys_chan_config first, second; |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 232 | |
| 233 | switch (type) { |
| 234 | case GSM_LCHAN_SDCCH: |
Harald Welte | af86c0f | 2009-08-10 14:44:24 +0200 | [diff] [blame] | 235 | if (bts->chan_alloc_reverse) { |
| 236 | first = GSM_PCHAN_SDCCH8_SACCH8C; |
| 237 | second = GSM_PCHAN_CCCH_SDCCH4; |
| 238 | } else { |
| 239 | first = GSM_PCHAN_CCCH_SDCCH4; |
| 240 | second = GSM_PCHAN_SDCCH8_SACCH8C; |
| 241 | } |
| 242 | |
| 243 | lchan = _lc_find_bts(bts, first); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 244 | if (lchan == NULL) |
Harald Welte | af86c0f | 2009-08-10 14:44:24 +0200 | [diff] [blame] | 245 | lchan = _lc_find_bts(bts, second); |
Holger Hans Peter Freyther | db39203 | 2010-09-06 08:58:42 +0800 | [diff] [blame] | 246 | |
| 247 | /* allow to assign bigger channels */ |
| 248 | if (allow_bigger) { |
| 249 | if (lchan == NULL) { |
| 250 | lchan = _lc_find_bts(bts, GSM_PCHAN_TCH_H); |
| 251 | type = GSM_LCHAN_TCH_H; |
| 252 | } |
| 253 | |
| 254 | if (lchan == NULL) { |
| 255 | lchan = _lc_find_bts(bts, GSM_PCHAN_TCH_F); |
| 256 | type = GSM_LCHAN_TCH_F; |
| 257 | } |
| 258 | } |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 259 | break; |
| 260 | case GSM_LCHAN_TCH_F: |
Harald Welte | ceb3c04 | 2009-08-10 13:46:55 +0200 | [diff] [blame] | 261 | lchan = _lc_find_bts(bts, GSM_PCHAN_TCH_F); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 262 | break; |
| 263 | case GSM_LCHAN_TCH_H: |
Harald Welte | ceb3c04 | 2009-08-10 13:46:55 +0200 | [diff] [blame] | 264 | lchan =_lc_find_bts(bts, GSM_PCHAN_TCH_H); |
Harald Welte | 1250337 | 2009-12-12 20:58:20 +0100 | [diff] [blame] | 265 | /* If we don't have TCH/H available, fall-back to TCH/F */ |
Harald Welte | 5ea9e8e | 2009-12-12 21:16:38 +0100 | [diff] [blame] | 266 | if (!lchan) { |
Harald Welte | 1250337 | 2009-12-12 20:58:20 +0100 | [diff] [blame] | 267 | lchan = _lc_find_bts(bts, GSM_PCHAN_TCH_F); |
Harald Welte | 5ea9e8e | 2009-12-12 21:16:38 +0100 | [diff] [blame] | 268 | type = GSM_LCHAN_TCH_F; |
| 269 | } |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 270 | break; |
| 271 | default: |
Harald Welte | cf2ec4a | 2009-12-17 23:10:46 +0100 | [diff] [blame] | 272 | LOGP(DRLL, LOGL_ERROR, "Unknown gsm_chan_t %u\n", type); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 273 | } |
| 274 | |
| 275 | if (lchan) { |
| 276 | lchan->type = type; |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 277 | |
Holger Hans Peter Freyther | d831805 | 2009-10-28 14:23:39 +0100 | [diff] [blame] | 278 | /* clear sapis */ |
Holger Hans Peter Freyther | 29afdc4 | 2009-11-18 22:59:51 +0100 | [diff] [blame] | 279 | memset(lchan->sapis, 0, ARRAY_SIZE(lchan->sapis)); |
Holger Hans Peter Freyther | d831805 | 2009-10-28 14:23:39 +0100 | [diff] [blame] | 280 | |
Holger Hans Peter Freyther | 3cce58f | 2009-11-18 22:57:02 +0100 | [diff] [blame] | 281 | /* clear multi rate config */ |
| 282 | memset(&lchan->mr_conf, 0, sizeof(lchan->mr_conf)); |
Harald Welte | 8f72544 | 2010-03-28 15:58:03 +0800 | [diff] [blame] | 283 | } else { |
| 284 | struct challoc_signal_data sig; |
| 285 | sig.bts = bts; |
| 286 | sig.type = type; |
Pablo Neira Ayuso | ef717c6 | 2011-05-06 12:12:31 +0200 | [diff] [blame] | 287 | osmo_signal_dispatch(SS_CHALLOC, S_CHALLOC_ALLOC_FAIL, &sig); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 288 | } |
| 289 | |
| 290 | return lchan; |
| 291 | } |
| 292 | |
| 293 | /* Free a logical channel */ |
| 294 | void lchan_free(struct gsm_lchan *lchan) |
| 295 | { |
Harald Welte | 8f72544 | 2010-03-28 15:58:03 +0800 | [diff] [blame] | 296 | struct challoc_signal_data sig; |
Harald Welte | f947681 | 2009-12-15 21:36:05 +0100 | [diff] [blame] | 297 | int i; |
| 298 | |
Harald Welte | 8f72544 | 2010-03-28 15:58:03 +0800 | [diff] [blame] | 299 | sig.type = lchan->type; |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 300 | lchan->type = GSM_LCHAN_NONE; |
Holger Hans Peter Freyther | 1a95fa8 | 2010-06-28 15:47:12 +0800 | [diff] [blame] | 301 | |
Daniel Willmann | b02b813 | 2011-08-11 04:55:45 +0200 | [diff] [blame^] | 302 | if (lchan->state != LCHAN_S_NONE) { |
| 303 | LOGP(DRLL, LOGL_NOTICE, "Freeing lchan with state %s - setting to NONE\n", gsm_lchans_name(lchan->state)); |
| 304 | lchan->state = LCHAN_S_NONE; |
| 305 | } |
Holger Hans Peter Freyther | 1a95fa8 | 2010-06-28 15:47:12 +0800 | [diff] [blame] | 306 | |
| 307 | if (lchan->conn) { |
Holger Hans Peter Freyther | 645b383 | 2010-12-27 13:28:20 +0100 | [diff] [blame] | 308 | struct lchan_signal_data sig; |
| 309 | |
Holger Hans Peter Freyther | 1a95fa8 | 2010-06-28 15:47:12 +0800 | [diff] [blame] | 310 | /* We might kill an active channel... */ |
Holger Hans Peter Freyther | 645b383 | 2010-12-27 13:28:20 +0100 | [diff] [blame] | 311 | sig.lchan = lchan; |
| 312 | sig.mr = NULL; |
Pablo Neira Ayuso | ef717c6 | 2011-05-06 12:12:31 +0200 | [diff] [blame] | 313 | osmo_signal_dispatch(SS_LCHAN, S_LCHAN_UNEXPECTED_RELEASE, &sig); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 314 | } |
| 315 | |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 316 | |
| 317 | /* stop the timer */ |
Pablo Neira Ayuso | 840ccf6 | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 318 | osmo_timer_del(&lchan->T3101); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 319 | |
Harald Welte | f947681 | 2009-12-15 21:36:05 +0100 | [diff] [blame] | 320 | /* clear cached measuement reports */ |
| 321 | lchan->meas_rep_idx = 0; |
| 322 | for (i = 0; i < ARRAY_SIZE(lchan->meas_rep); i++) { |
| 323 | lchan->meas_rep[i].flags = 0; |
| 324 | lchan->meas_rep[i].nr = 0; |
| 325 | } |
Harald Welte | 92d8891 | 2009-12-21 13:30:17 +0100 | [diff] [blame] | 326 | for (i = 0; i < ARRAY_SIZE(lchan->neigh_meas); i++) |
| 327 | lchan->neigh_meas[i].arfcn = 0; |
Harald Welte | f947681 | 2009-12-15 21:36:05 +0100 | [diff] [blame] | 328 | |
Holger Hans Peter Freyther | c08f6f0 | 2010-06-22 12:11:59 +0800 | [diff] [blame] | 329 | if (lchan->rqd_ref) { |
| 330 | talloc_free(lchan->rqd_ref); |
| 331 | lchan->rqd_ref = NULL; |
| 332 | lchan->rqd_ta = 0; |
| 333 | } |
| 334 | |
Harald Welte | 8f72544 | 2010-03-28 15:58:03 +0800 | [diff] [blame] | 335 | sig.lchan = lchan; |
| 336 | sig.bts = lchan->ts->trx->bts; |
Pablo Neira Ayuso | ef717c6 | 2011-05-06 12:12:31 +0200 | [diff] [blame] | 337 | osmo_signal_dispatch(SS_CHALLOC, S_CHALLOC_FREED, &sig); |
Harald Welte | 8f72544 | 2010-03-28 15:58:03 +0800 | [diff] [blame] | 338 | |
Holger Hans Peter Freyther | 1a95fa8 | 2010-06-28 15:47:12 +0800 | [diff] [blame] | 339 | if (lchan->conn) { |
Holger Hans Peter Freyther | 6e5c50f | 2010-06-28 17:09:29 +0800 | [diff] [blame] | 340 | LOGP(DRLL, LOGL_ERROR, "the subscriber connection should be gone.\n"); |
Holger Hans Peter Freyther | 1a95fa8 | 2010-06-28 15:47:12 +0800 | [diff] [blame] | 341 | lchan->conn = NULL; |
| 342 | } |
| 343 | |
Holger Hans Peter Freyther | 3fdf5b9 | 2010-07-29 17:09:36 +0800 | [diff] [blame] | 344 | lchan->sach_deact = 0; |
| 345 | lchan->release_reason = 0; |
| 346 | |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 347 | /* FIXME: ts_free() the timeslot, if we're the last logical |
| 348 | * channel using it */ |
| 349 | } |
| 350 | |
Holger Hans Peter Freyther | 5a8b2b4 | 2010-04-15 11:21:02 +0200 | [diff] [blame] | 351 | /* |
| 352 | * There was an error with the TRX and we need to forget |
| 353 | * any state so that a lchan can be allocated again after |
| 354 | * the trx is fully usable. |
Holger Hans Peter Freyther | 66a3c77 | 2010-06-22 12:19:06 +0800 | [diff] [blame] | 355 | * |
| 356 | * This should be called after lchan_free to force a channel |
| 357 | * be available for allocation again. This means that this |
| 358 | * method will stop the "delay after error"-timer and set the |
| 359 | * state to LCHAN_S_NONE. |
Holger Hans Peter Freyther | 5a8b2b4 | 2010-04-15 11:21:02 +0200 | [diff] [blame] | 360 | */ |
| 361 | void lchan_reset(struct gsm_lchan *lchan) |
| 362 | { |
Pablo Neira Ayuso | 840ccf6 | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 363 | osmo_timer_del(&lchan->T3101); |
| 364 | osmo_timer_del(&lchan->T3111); |
| 365 | osmo_timer_del(&lchan->error_timer); |
Holger Hans Peter Freyther | 5a8b2b4 | 2010-04-15 11:21:02 +0200 | [diff] [blame] | 366 | |
| 367 | lchan->type = GSM_LCHAN_NONE; |
| 368 | lchan->state = LCHAN_S_NONE; |
| 369 | } |
| 370 | |
Holger Hans Peter Freyther | 3fdf5b9 | 2010-07-29 17:09:36 +0800 | [diff] [blame] | 371 | /* release the next allocated SAPI or return 0 */ |
| 372 | static int _lchan_release_next_sapi(struct gsm_lchan *lchan) |
| 373 | { |
| 374 | int sapi; |
| 375 | |
| 376 | for (sapi = 1; sapi < ARRAY_SIZE(lchan->sapis); ++sapi) { |
Holger Hans Peter Freyther | 7eb8a9a | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 377 | uint8_t link_id; |
Holger Hans Peter Freyther | 3fdf5b9 | 2010-07-29 17:09:36 +0800 | [diff] [blame] | 378 | if (lchan->sapis[sapi] == LCHAN_SAPI_UNUSED) |
| 379 | continue; |
| 380 | |
| 381 | link_id = sapi; |
| 382 | if (lchan->type == GSM_LCHAN_TCH_F || lchan->type == GSM_LCHAN_TCH_H) |
| 383 | link_id |= 0x40; |
| 384 | rsl_release_request(lchan, link_id, lchan->release_reason); |
| 385 | return 0; |
| 386 | } |
| 387 | |
| 388 | return 1; |
| 389 | } |
| 390 | |
| 391 | /* Drive the release process of the lchan */ |
| 392 | static void _lchan_handle_release(struct gsm_lchan *lchan) |
| 393 | { |
| 394 | /* Ask for SAPI != 0 to be freed first and stop if we need to wait */ |
| 395 | if (_lchan_release_next_sapi(lchan) == 0) |
| 396 | return; |
| 397 | |
| 398 | if (lchan->sach_deact) { |
| 399 | gsm48_send_rr_release(lchan); |
| 400 | return; |
| 401 | } |
| 402 | |
| 403 | rsl_release_request(lchan, 0, lchan->release_reason); |
| 404 | rsl_lchan_set_state(lchan, LCHAN_S_REL_REQ); |
| 405 | } |
| 406 | |
| 407 | /* called from abis rsl */ |
Holger Hans Peter Freyther | 7eb8a9a | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 408 | int rsl_lchan_rll_release(struct gsm_lchan *lchan, uint8_t link_id) |
Holger Hans Peter Freyther | 3fdf5b9 | 2010-07-29 17:09:36 +0800 | [diff] [blame] | 409 | { |
| 410 | if (lchan->state != LCHAN_S_REL_REQ) |
| 411 | return -1; |
| 412 | |
| 413 | if ((link_id & 0x7) != 0) |
| 414 | _lchan_handle_release(lchan); |
| 415 | return 0; |
| 416 | } |
Holger Hans Peter Freyther | 5a8b2b4 | 2010-04-15 11:21:02 +0200 | [diff] [blame] | 417 | |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 418 | /* Consider releasing the channel now */ |
Holger Hans Peter Freyther | 6e5c50f | 2010-06-28 17:09:29 +0800 | [diff] [blame] | 419 | int lchan_release(struct gsm_lchan *lchan, int sach_deact, int reason) |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 420 | { |
Holger Hans Peter Freyther | 3fdf5b9 | 2010-07-29 17:09:36 +0800 | [diff] [blame] | 421 | DEBUGP(DRLL, "%s starting release sequence\n", gsm_lchan_name(lchan)); |
Holger Hans Peter Freyther | 79a62f4 | 2010-04-10 00:14:55 +0200 | [diff] [blame] | 422 | rsl_lchan_set_state(lchan, LCHAN_S_REL_REQ); |
Holger Hans Peter Freyther | 3fdf5b9 | 2010-07-29 17:09:36 +0800 | [diff] [blame] | 423 | |
Holger Hans Peter Freyther | 5322dbf | 2010-11-14 16:04:46 +0100 | [diff] [blame] | 424 | lchan->conn = NULL; |
Holger Hans Peter Freyther | 3fdf5b9 | 2010-07-29 17:09:36 +0800 | [diff] [blame] | 425 | lchan->release_reason = reason; |
| 426 | lchan->sach_deact = sach_deact; |
| 427 | _lchan_handle_release(lchan); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 428 | return 1; |
| 429 | } |
| 430 | |
Holger Hans Peter Freyther | 8bf60d4 | 2010-06-16 13:05:35 +0800 | [diff] [blame] | 431 | static struct gsm_lchan* lchan_find(struct gsm_bts *bts, struct gsm_subscriber *subscr) { |
Harald Welte | e712a5f | 2009-06-21 16:17:15 +0200 | [diff] [blame] | 432 | struct gsm_bts_trx *trx; |
Holger Hans Peter Freyther | 7113514 | 2010-03-29 08:47:44 +0200 | [diff] [blame] | 433 | int ts_no, lchan_no; |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 434 | |
Harald Welte | e712a5f | 2009-06-21 16:17:15 +0200 | [diff] [blame] | 435 | llist_for_each_entry(trx, &bts->trx_list, list) { |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 436 | for (ts_no = 0; ts_no < 8; ++ts_no) { |
| 437 | for (lchan_no = 0; lchan_no < TS_MAX_LCHAN; ++lchan_no) { |
| 438 | struct gsm_lchan *lchan = |
Harald Welte | e712a5f | 2009-06-21 16:17:15 +0200 | [diff] [blame] | 439 | &trx->ts[ts_no].lchan[lchan_no]; |
Holger Hans Peter Freyther | 1a95fa8 | 2010-06-28 15:47:12 +0800 | [diff] [blame] | 440 | if (lchan->conn && subscr == lchan->conn->subscr) |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 441 | return lchan; |
| 442 | } |
| 443 | } |
| 444 | } |
| 445 | |
| 446 | return NULL; |
| 447 | } |
Harald Welte | aa60edb | 2009-08-09 18:52:33 +0200 | [diff] [blame] | 448 | |
Holger Hans Peter Freyther | 2f4af77 | 2010-06-16 13:23:55 +0800 | [diff] [blame] | 449 | struct gsm_subscriber_connection *connection_for_subscr(struct gsm_subscriber *subscr) |
Harald Welte | aa60edb | 2009-08-09 18:52:33 +0200 | [diff] [blame] | 450 | { |
| 451 | struct gsm_bts *bts; |
| 452 | struct gsm_network *net = subscr->net; |
| 453 | struct gsm_lchan *lchan; |
| 454 | |
| 455 | llist_for_each_entry(bts, &net->bts_list, list) { |
| 456 | lchan = lchan_find(bts, subscr); |
| 457 | if (lchan) |
Holger Hans Peter Freyther | 1a95fa8 | 2010-06-28 15:47:12 +0800 | [diff] [blame] | 458 | return lchan->conn; |
Harald Welte | aa60edb | 2009-08-09 18:52:33 +0200 | [diff] [blame] | 459 | } |
| 460 | |
Holger Hans Peter Freyther | 3265b1a | 2009-10-27 10:42:53 +0100 | [diff] [blame] | 461 | return NULL; |
Harald Welte | aa60edb | 2009-08-09 18:52:33 +0200 | [diff] [blame] | 462 | } |
Harald Welte | fe96f38 | 2009-12-22 13:09:29 +0100 | [diff] [blame] | 463 | |
| 464 | void bts_chan_load(struct pchan_load *cl, const struct gsm_bts *bts) |
| 465 | { |
| 466 | struct gsm_bts_trx *trx; |
| 467 | |
| 468 | llist_for_each_entry(trx, &bts->trx_list, list) { |
| 469 | int i; |
| 470 | |
| 471 | /* skip administratively deactivated tranxsceivers */ |
Harald Welte | 69f6f81 | 2011-05-30 12:07:53 +0200 | [diff] [blame] | 472 | if (!nm_is_running(&trx->mo.nm_state) || |
| 473 | !nm_is_running(&trx->bb_transc.mo.nm_state)) |
Harald Welte | fe96f38 | 2009-12-22 13:09:29 +0100 | [diff] [blame] | 474 | continue; |
| 475 | |
| 476 | for (i = 0; i < ARRAY_SIZE(trx->ts); i++) { |
| 477 | struct gsm_bts_trx_ts *ts = &trx->ts[i]; |
| 478 | struct load_counter *pl = &cl->pchan[ts->pchan]; |
| 479 | int j; |
| 480 | |
| 481 | /* skip administratively deactivated timeslots */ |
Harald Welte | 69f6f81 | 2011-05-30 12:07:53 +0200 | [diff] [blame] | 482 | if (!nm_is_running(&ts->mo.nm_state)) |
Harald Welte | fe96f38 | 2009-12-22 13:09:29 +0100 | [diff] [blame] | 483 | continue; |
| 484 | |
| 485 | for (j = 0; j < subslots_per_pchan[ts->pchan]; j++) { |
| 486 | struct gsm_lchan *lchan = &ts->lchan[j]; |
| 487 | |
| 488 | pl->total++; |
| 489 | |
| 490 | switch (lchan->state) { |
| 491 | case LCHAN_S_NONE: |
| 492 | break; |
| 493 | default: |
| 494 | pl->used++; |
| 495 | break; |
| 496 | } |
| 497 | } |
| 498 | } |
| 499 | } |
| 500 | } |
| 501 | |
| 502 | void network_chan_load(struct pchan_load *pl, struct gsm_network *net) |
| 503 | { |
| 504 | struct gsm_bts *bts; |
| 505 | |
| 506 | memset(pl, 0, sizeof(*pl)); |
| 507 | |
| 508 | llist_for_each_entry(bts, &net->bts_list, list) |
| 509 | bts_chan_load(pl, bts); |
| 510 | } |
Holger Hans Peter Freyther | 1a95fa8 | 2010-06-28 15:47:12 +0800 | [diff] [blame] | 511 | |