Holger Hans Peter Freyther | b6acfda | 2013-10-17 19:41:11 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 by Holger Hans Peter Freyther |
| 3 | * |
| 4 | * All Rights Reserved |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU Affero General Public License as published by |
| 8 | * the Free Software Foundation; either version 3 of the License, or |
| 9 | * (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 Affero General Public License |
| 17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 18 | * |
| 19 | */ |
| 20 | |
| 21 | #include <bts.h> |
Holger Hans Peter Freyther | b78adcd | 2013-10-17 20:12:37 +0200 | [diff] [blame] | 22 | #include <poll_controller.h> |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 23 | #include <tbf.h> |
Holger Hans Peter Freyther | 63f29d6 | 2013-10-19 19:04:03 +0200 | [diff] [blame] | 24 | #include <encoding.h> |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 25 | #include <decoding.h> |
| 26 | #include <rlc.h> |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 27 | #include <pcu_l1_if.h> |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 28 | |
| 29 | #include <gprs_rlcmac.h> |
Holger Hans Peter Freyther | 24e98d0 | 2013-10-19 18:15:44 +0200 | [diff] [blame] | 30 | #include <gprs_debug.h> |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 31 | |
| 32 | extern "C" { |
| 33 | #include <osmocom/core/talloc.h> |
Holger Hans Peter Freyther | 24e98d0 | 2013-10-19 18:15:44 +0200 | [diff] [blame] | 34 | #include <osmocom/core/msgb.h> |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 35 | } |
Holger Hans Peter Freyther | b78adcd | 2013-10-17 20:12:37 +0200 | [diff] [blame] | 36 | |
Holger Hans Peter Freyther | 24e98d0 | 2013-10-19 18:15:44 +0200 | [diff] [blame] | 37 | #include <arpa/inet.h> |
| 38 | |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 39 | #include <errno.h> |
Holger Hans Peter Freyther | b6acfda | 2013-10-17 19:41:11 +0200 | [diff] [blame] | 40 | #include <string.h> |
| 41 | |
Holger Hans Peter Freyther | 24e98d0 | 2013-10-19 18:15:44 +0200 | [diff] [blame] | 42 | extern void *tall_pcu_ctx; |
| 43 | |
Holger Hans Peter Freyther | b6acfda | 2013-10-17 19:41:11 +0200 | [diff] [blame] | 44 | static BTS s_bts; |
| 45 | |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 46 | /** |
| 47 | * For gcc-4.4 compat do not use extended initializer list but keep the |
| 48 | * order from the enum here. Once we support GCC4.7 and up we can change |
| 49 | * the code below. |
| 50 | */ |
| 51 | static const struct rate_ctr_desc bts_ctr_description[] = { |
| 52 | { "tbf.dl.alloc", "TBF DL Allocated "}, |
| 53 | { "tbf.dl.freed", "TBF DL Freed "}, |
| 54 | { "tbf.ul.alloc", "TBF UL Allocated "}, |
| 55 | { "tbf.ul.freed", "TBF UL Freed "}, |
| 56 | { "decode.errors", "Decode Errors "}, |
Holger Hans Peter Freyther | 93e048f | 2013-10-27 10:00:47 +0100 | [diff] [blame] | 57 | { "sba.allocated", "SBA Allocated "}, |
| 58 | { "sba.freed", "SBA Freed "}, |
| 59 | { "sba.timedout", "SBA Timeout "}, |
Holger Hans Peter Freyther | 1997787 | 2013-10-27 10:34:31 +0100 | [diff] [blame] | 60 | { "llc.timeout", "Timedout Frames "}, |
| 61 | { "llc.dropped", "Dropped Frames "}, |
Holger Hans Peter Freyther | c1ae226 | 2013-10-27 10:50:35 +0100 | [diff] [blame] | 62 | { "rach.requests", "RACH requests "}, |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 63 | }; |
| 64 | |
| 65 | static const struct rate_ctr_group_desc bts_ctrg_desc = { |
| 66 | "bts", |
| 67 | "BTS Statistics", |
| 68 | ARRAY_SIZE(bts_ctr_description), |
| 69 | bts_ctr_description, |
| 70 | }; |
| 71 | |
Holger Hans Peter Freyther | b6acfda | 2013-10-17 19:41:11 +0200 | [diff] [blame] | 72 | BTS* BTS::main_bts() |
| 73 | { |
| 74 | return &s_bts; |
| 75 | } |
| 76 | |
| 77 | struct gprs_rlcmac_bts *BTS::bts_data() |
| 78 | { |
| 79 | return &m_bts; |
| 80 | } |
| 81 | |
| 82 | struct gprs_rlcmac_bts *bts_main_data() |
| 83 | { |
| 84 | return BTS::main_bts()->bts_data(); |
| 85 | } |
| 86 | |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 87 | struct rate_ctr_group *bts_main_data_stats() |
| 88 | { |
| 89 | return BTS::main_bts()->rate_counters(); |
| 90 | } |
| 91 | |
Holger Hans Peter Freyther | b6acfda | 2013-10-17 19:41:11 +0200 | [diff] [blame] | 92 | BTS::BTS() |
Holger Hans Peter Freyther | 9b30c7f | 2013-10-17 19:59:56 +0200 | [diff] [blame] | 93 | : m_cur_fn(0) |
Holger Hans Peter Freyther | b78adcd | 2013-10-17 20:12:37 +0200 | [diff] [blame] | 94 | , m_pollController(*this) |
Holger Hans Peter Freyther | cedf890 | 2013-10-19 20:47:12 +0200 | [diff] [blame] | 95 | , m_sba(*this) |
Holger Hans Peter Freyther | b6acfda | 2013-10-17 19:41:11 +0200 | [diff] [blame] | 96 | { |
| 97 | memset(&m_bts, 0, sizeof(m_bts)); |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 98 | INIT_LLIST_HEAD(&m_bts.ul_tbfs); |
| 99 | INIT_LLIST_HEAD(&m_bts.dl_tbfs); |
Holger Hans Peter Freyther | b6acfda | 2013-10-17 19:41:11 +0200 | [diff] [blame] | 100 | m_bts.bts = this; |
Holger Hans Peter Freyther | 4ed1dae | 2013-10-20 10:14:03 +0200 | [diff] [blame] | 101 | |
| 102 | /* initialize back pointers */ |
| 103 | for (size_t trx_no = 0; trx_no < ARRAY_SIZE(m_bts.trx); ++trx_no) { |
| 104 | struct gprs_rlcmac_trx *trx = &m_bts.trx[trx_no]; |
| 105 | trx->trx_no = trx_no; |
| 106 | trx->bts = this; |
| 107 | |
| 108 | for (size_t ts_no = 0; ts_no < ARRAY_SIZE(trx->pdch); ++ts_no) { |
| 109 | struct gprs_rlcmac_pdch *pdch = &trx->pdch[ts_no]; |
| 110 | pdch->ts_no = ts_no; |
| 111 | pdch->trx = trx; |
| 112 | } |
| 113 | } |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 114 | |
| 115 | m_ratectrs = rate_ctr_group_alloc(tall_pcu_ctx, &bts_ctrg_desc, 0); |
Holger Hans Peter Freyther | b6acfda | 2013-10-17 19:41:11 +0200 | [diff] [blame] | 116 | } |
Holger Hans Peter Freyther | 9b30c7f | 2013-10-17 19:59:56 +0200 | [diff] [blame] | 117 | |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 118 | BTS::~BTS() |
| 119 | { |
| 120 | rate_ctr_group_free(m_ratectrs); |
| 121 | } |
| 122 | |
| 123 | |
Holger Hans Peter Freyther | 9b30c7f | 2013-10-17 19:59:56 +0200 | [diff] [blame] | 124 | void BTS::set_current_frame_number(int fn) |
| 125 | { |
| 126 | m_cur_fn = fn; |
Holger Hans Peter Freyther | b78adcd | 2013-10-17 20:12:37 +0200 | [diff] [blame] | 127 | m_pollController.expireTimedout(m_cur_fn); |
Holger Hans Peter Freyther | 9b30c7f | 2013-10-17 19:59:56 +0200 | [diff] [blame] | 128 | } |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 129 | |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 130 | int BTS::add_paging(uint8_t chan_needed, uint8_t *identity_lv) |
| 131 | { |
| 132 | uint8_t l, trx, ts, any_tbf = 0; |
| 133 | struct gprs_rlcmac_tbf *tbf; |
| 134 | struct gprs_rlcmac_paging *pag; |
| 135 | uint8_t slot_mask[8]; |
| 136 | int8_t first_ts; /* must be signed */ |
| 137 | |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 138 | llist_head *tbfs_lists[] = { |
| 139 | &m_bts.ul_tbfs, |
| 140 | &m_bts.dl_tbfs, |
| 141 | NULL |
| 142 | }; |
| 143 | |
| 144 | |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 145 | LOGP(DRLCMAC, LOGL_INFO, "Add RR paging: chan-needed=%d MI=%s\n", |
| 146 | chan_needed, osmo_hexdump(identity_lv + 1, identity_lv[0])); |
| 147 | |
| 148 | /* collect slots to page |
| 149 | * Mark slots for every TBF, but only mark one of it. |
| 150 | * Mark only the first slot found. |
| 151 | * Don't mark, if TBF uses a different slot that is already marked. */ |
| 152 | memset(slot_mask, 0, sizeof(slot_mask)); |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 153 | for (l = 0; tbfs_lists[l]; l++) { |
| 154 | llist_for_each_entry(tbf, tbfs_lists[l], list) { |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 155 | first_ts = -1; |
| 156 | for (ts = 0; ts < 8; ts++) { |
| 157 | if (tbf->pdch[ts]) { |
| 158 | /* remember the first slot found */ |
| 159 | if (first_ts < 0) |
| 160 | first_ts = ts; |
| 161 | /* break, if we already marked a slot */ |
Holger Hans Peter Freyther | ec80f82 | 2013-10-27 13:44:37 +0100 | [diff] [blame] | 162 | if ((slot_mask[tbf->trx->trx_no] & (1 << ts))) |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 163 | break; |
| 164 | } |
| 165 | } |
| 166 | /* mark first slot found, if none is marked already */ |
| 167 | if (ts == 8 && first_ts >= 0) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 168 | LOGP(DRLCMAC, LOGL_DEBUG, "- %s uses " |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 169 | "TRX=%d TS=%d, so we mark\n", |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 170 | tbf_name(tbf), |
| 171 | tbf->trx->trx_no, first_ts); |
Holger Hans Peter Freyther | ec80f82 | 2013-10-27 13:44:37 +0100 | [diff] [blame] | 172 | slot_mask[tbf->trx->trx_no] |= (1 << first_ts); |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 173 | } else |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 174 | LOGP(DRLCMAC, LOGL_DEBUG, "- %s uses " |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 175 | "already marked TRX=%d TS=%d\n", |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 176 | tbf_name(tbf), |
| 177 | tbf->trx->trx_no, ts); |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 178 | } |
| 179 | } |
| 180 | |
| 181 | /* Now we have a list of marked slots. Every TBF uses at least one |
| 182 | * of these slots. */ |
| 183 | |
| 184 | /* schedule paging to all marked slots */ |
| 185 | for (trx = 0; trx < 8; trx++) { |
| 186 | if (slot_mask[trx] == 0) |
| 187 | continue; |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 188 | for (ts = 0; ts < 8; ts++) { |
| 189 | if ((slot_mask[trx] & (1 << ts))) { |
| 190 | /* schedule */ |
| 191 | pag = talloc_zero(tall_pcu_ctx, |
| 192 | struct gprs_rlcmac_paging); |
| 193 | if (!pag) |
| 194 | return -ENOMEM; |
| 195 | pag->chan_needed = chan_needed; |
| 196 | memcpy(pag->identity_lv, identity_lv, |
| 197 | identity_lv[0] + 1); |
| 198 | m_bts.trx[trx].pdch[ts].add_paging(pag); |
| 199 | LOGP(DRLCMAC, LOGL_INFO, "Paging on PACCH of " |
| 200 | "TRX=%d TS=%d\n", trx, ts); |
Holger Hans Peter Freyther | 9446485 | 2013-10-19 18:33:52 +0200 | [diff] [blame] | 201 | any_tbf = 1; |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 202 | } |
| 203 | } |
| 204 | } |
| 205 | |
| 206 | if (!any_tbf) |
| 207 | LOGP(DRLCMAC, LOGL_INFO, "No paging, because no TBF\n"); |
| 208 | |
| 209 | return 0; |
| 210 | } |
| 211 | |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 212 | /* search for active downlink or uplink tbf */ |
| 213 | gprs_rlcmac_tbf *BTS::tbf_by_tlli(uint32_t tlli, enum gprs_rlcmac_tbf_direction dir) |
| 214 | { |
| 215 | struct gprs_rlcmac_tbf *tbf; |
| 216 | if (dir == GPRS_RLCMAC_UL_TBF) { |
| 217 | llist_for_each_entry(tbf, &m_bts.ul_tbfs, list) { |
| 218 | if (tbf->state_is_not(GPRS_RLCMAC_RELEASING) |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 219 | && tbf->tlli() == tlli && tbf->is_tlli_valid()) |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 220 | return tbf; |
| 221 | } |
| 222 | } else { |
| 223 | llist_for_each_entry(tbf, &m_bts.dl_tbfs, list) { |
| 224 | if (tbf->state_is_not(GPRS_RLCMAC_RELEASING) |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 225 | && tbf->tlli() == tlli) |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 226 | return tbf; |
| 227 | } |
| 228 | } |
| 229 | return NULL; |
| 230 | } |
| 231 | |
| 232 | gprs_rlcmac_tbf *BTS::tbf_by_poll_fn(uint32_t fn, uint8_t trx, uint8_t ts) |
| 233 | { |
| 234 | struct gprs_rlcmac_tbf *tbf; |
| 235 | |
| 236 | /* only one TBF can poll on specific TS/FN, because scheduler can only |
| 237 | * schedule one downlink control block (with polling) at a FN per TS */ |
| 238 | llist_for_each_entry(tbf, &m_bts.ul_tbfs, list) { |
| 239 | if (tbf->state_is_not(GPRS_RLCMAC_RELEASING) |
| 240 | && tbf->poll_state == GPRS_RLCMAC_POLL_SCHED |
Holger Hans Peter Freyther | ec80f82 | 2013-10-27 13:44:37 +0100 | [diff] [blame] | 241 | && tbf->poll_fn == fn && tbf->trx->trx_no == trx |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 242 | && tbf->control_ts == ts) |
| 243 | return tbf; |
| 244 | } |
| 245 | llist_for_each_entry(tbf, &m_bts.dl_tbfs, list) { |
| 246 | if (tbf->state_is_not(GPRS_RLCMAC_RELEASING) |
| 247 | && tbf->poll_state == GPRS_RLCMAC_POLL_SCHED |
Holger Hans Peter Freyther | ec80f82 | 2013-10-27 13:44:37 +0100 | [diff] [blame] | 248 | && tbf->poll_fn == fn && tbf->trx->trx_no == trx |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 249 | && tbf->control_ts == ts) |
| 250 | return tbf; |
| 251 | } |
| 252 | return NULL; |
| 253 | } |
| 254 | |
Holger Hans Peter Freyther | f63cabd | 2013-10-26 19:10:43 +0200 | [diff] [blame] | 255 | /* lookup TBF Entity (by TFI) */ |
| 256 | gprs_rlcmac_tbf *BTS::tbf_by_tfi(uint8_t tfi, uint8_t trx, |
| 257 | enum gprs_rlcmac_tbf_direction dir) |
| 258 | { |
| 259 | struct gprs_rlcmac_tbf *tbf; |
| 260 | |
| 261 | if (tfi >= 32 || trx >= 8) |
| 262 | return NULL; |
| 263 | |
| 264 | if (dir == GPRS_RLCMAC_UL_TBF) |
| 265 | tbf = m_bts.trx[trx].ul_tbf[tfi]; |
| 266 | else |
| 267 | tbf = m_bts.trx[trx].dl_tbf[tfi]; |
| 268 | if (!tbf) |
| 269 | return NULL; |
| 270 | |
| 271 | if (tbf->state_is_not(GPRS_RLCMAC_RELEASING)) |
| 272 | return tbf; |
| 273 | |
| 274 | return NULL; |
| 275 | } |
| 276 | |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 277 | /* FIXME: spread resources over multiple TRX. Also add option to use same |
| 278 | * TRX in case of existing TBF for TLLI in the other direction. */ |
| 279 | /* search for free TFI and return TFI, TRX */ |
| 280 | int BTS::tfi_find_free(enum gprs_rlcmac_tbf_direction dir, |
| 281 | uint8_t *_trx, int8_t use_trx) |
| 282 | { |
| 283 | struct gprs_rlcmac_pdch *pdch; |
| 284 | struct gprs_rlcmac_tbf **tbfp; |
| 285 | uint8_t trx_from, trx_to, trx, ts, tfi; |
| 286 | |
| 287 | if (use_trx >= 0 && use_trx < 8) |
| 288 | trx_from = trx_to = use_trx; |
| 289 | else { |
| 290 | trx_from = 0; |
| 291 | trx_to = 7; |
| 292 | } |
| 293 | |
| 294 | /* on TRX find first enabled TS */ |
| 295 | for (trx = trx_from; trx <= trx_to; trx++) { |
| 296 | for (ts = 0; ts < 8; ts++) { |
| 297 | pdch = &m_bts.trx[trx].pdch[ts]; |
| 298 | if (!pdch->is_enabled()) |
| 299 | continue; |
| 300 | break; |
| 301 | } |
| 302 | if (ts < 8) |
| 303 | break; |
| 304 | } |
| 305 | if (trx > trx_to) { |
| 306 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH available.\n"); |
| 307 | return -EINVAL; |
| 308 | } |
| 309 | |
| 310 | |
| 311 | LOGP(DRLCMAC, LOGL_DEBUG, "Searching for first unallocated TFI: " |
| 312 | "TRX=%d first TS=%d\n", trx, ts); |
| 313 | if (dir == GPRS_RLCMAC_UL_TBF) |
| 314 | tbfp = m_bts.trx[trx].ul_tbf; |
| 315 | else |
| 316 | tbfp = m_bts.trx[trx].dl_tbf; |
| 317 | for (tfi = 0; tfi < 32; tfi++) { |
| 318 | if (!tbfp[tfi]) |
| 319 | break; |
| 320 | } |
| 321 | |
| 322 | if (tfi < 32) { |
| 323 | LOGP(DRLCMAC, LOGL_DEBUG, " Found TFI=%d.\n", tfi); |
| 324 | *_trx = trx; |
| 325 | return tfi; |
| 326 | } |
| 327 | LOGP(DRLCMAC, LOGL_NOTICE, "No TFI available.\n"); |
| 328 | |
| 329 | return -1; |
| 330 | } |
| 331 | |
Holger Hans Peter Freyther | 40cfaa6 | 2013-10-26 19:49:16 +0200 | [diff] [blame] | 332 | int BTS::rcv_imm_ass_cnf(const uint8_t *data, uint32_t fn) |
| 333 | { |
| 334 | struct gprs_rlcmac_tbf *tbf; |
| 335 | uint8_t plen; |
| 336 | uint32_t tlli; |
| 337 | |
| 338 | /* move to IA Rest Octets */ |
| 339 | plen = data[0] >> 2; |
| 340 | data += 1 + plen; |
| 341 | |
| 342 | if ((*data & 0xf0) != 0xd0) { |
| 343 | LOGP(DRLCMAC, LOGL_ERROR, "Got IMM.ASS confirm, but rest " |
| 344 | "octets do not start with bit sequence 'HH01' " |
| 345 | "(Packet Downlink Assignment)\n"); |
| 346 | return -EINVAL; |
| 347 | } |
| 348 | |
| 349 | /* get TLLI from downlink assignment */ |
| 350 | tlli = (*data++) << 28; |
| 351 | tlli |= (*data++) << 20; |
| 352 | tlli |= (*data++) << 12; |
| 353 | tlli |= (*data++) << 4; |
| 354 | tlli |= (*data++) >> 4; |
| 355 | |
| 356 | tbf = tbf_by_tlli(tlli, GPRS_RLCMAC_DL_TBF); |
| 357 | if (!tbf) { |
| 358 | LOGP(DRLCMAC, LOGL_ERROR, "Got IMM.ASS confirm, but TLLI=%08x " |
| 359 | "does not exit\n", tlli); |
| 360 | return -EINVAL; |
| 361 | } |
| 362 | |
| 363 | LOGP(DRLCMAC, LOGL_DEBUG, "Got IMM.ASS confirm for TLLI=%08x\n", tlli); |
| 364 | |
| 365 | if (tbf->dir.dl.wait_confirm) |
| 366 | tbf_timer_start(tbf, 0, Tassign_agch); |
| 367 | |
| 368 | return 0; |
| 369 | } |
| 370 | |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 371 | int BTS::rcv_rach(uint8_t ra, uint32_t Fn, int16_t qta) |
| 372 | { |
| 373 | struct gprs_rlcmac_tbf *tbf; |
| 374 | uint8_t trx, ts = 0; |
| 375 | int8_t tfi; /* must be signed */ |
| 376 | uint8_t sb = 0; |
| 377 | uint32_t sb_fn = 0; |
| 378 | int rc; |
| 379 | uint8_t plen; |
| 380 | |
Holger Hans Peter Freyther | c1ae226 | 2013-10-27 10:50:35 +0100 | [diff] [blame] | 381 | rach_frame(); |
| 382 | |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 383 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF on RACH, so we provide " |
| 384 | "one:\n"); |
| 385 | if ((ra & 0xf8) == 0x70) { |
| 386 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests single block " |
| 387 | "allocation\n"); |
| 388 | sb = 1; |
| 389 | } else if (m_bts.force_two_phase) { |
| 390 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests single phase access, " |
| 391 | "but we force two phase access\n"); |
| 392 | sb = 1; |
| 393 | } |
| 394 | if (qta < 0) |
| 395 | qta = 0; |
| 396 | if (qta > 252) |
| 397 | qta = 252; |
| 398 | if (sb) { |
| 399 | rc = sba()->alloc(&trx, &ts, &sb_fn, qta >> 2); |
| 400 | if (rc < 0) |
| 401 | return rc; |
| 402 | LOGP(DRLCMAC, LOGL_DEBUG, "RX: [PCU <- BTS] RACH qbit-ta=%d " |
| 403 | "ra=0x%02x, Fn=%d (%d,%d,%d)\n", qta, ra, Fn, |
| 404 | (Fn / (26 * 51)) % 32, Fn % 51, Fn % 26); |
| 405 | LOGP(DRLCMAC, LOGL_INFO, "TX: Immediate Assignment Uplink " |
| 406 | "(AGCH)\n"); |
| 407 | } else { |
| 408 | // Create new TBF |
| 409 | #warning "Copy and pate with other routines.." |
| 410 | tfi = tfi_find_free(GPRS_RLCMAC_UL_TBF, &trx, -1); |
| 411 | if (tfi < 0) { |
Holger Hans Peter Freyther | 90b87ea | 2013-10-27 10:38:31 +0100 | [diff] [blame] | 412 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH resource\n"); |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 413 | /* FIXME: send reject */ |
| 414 | return -EBUSY; |
| 415 | } |
| 416 | /* set class to 0, since we don't know the multislot class yet */ |
| 417 | tbf = tbf_alloc(&m_bts, NULL, GPRS_RLCMAC_UL_TBF, tfi, trx, 0, 1); |
| 418 | if (!tbf) { |
Holger Hans Peter Freyther | 90b87ea | 2013-10-27 10:38:31 +0100 | [diff] [blame] | 419 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH resource\n"); |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 420 | /* FIXME: send reject */ |
| 421 | return -EBUSY; |
| 422 | } |
| 423 | tbf->ta = qta >> 2; |
| 424 | tbf_new_state(tbf, GPRS_RLCMAC_FLOW); |
| 425 | tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_CCCH); |
| 426 | tbf_timer_start(tbf, 3169, m_bts.t3169, 0); |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 427 | LOGP(DRLCMAC, LOGL_DEBUG, "%s [UPLINK] START\n", |
| 428 | tbf_name(tbf)); |
| 429 | LOGP(DRLCMAC, LOGL_DEBUG, "%s RX: [PCU <- BTS] RACH " |
| 430 | "qbit-ta=%d ra=0x%02x, Fn=%d (%d,%d,%d)\n", |
| 431 | tbf_name(tbf), |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 432 | qta, ra, Fn, (Fn / (26 * 51)) % 32, Fn % 51, Fn % 26); |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 433 | LOGP(DRLCMAC, LOGL_INFO, "%s TX: START Immediate " |
| 434 | "Assignment Uplink (AGCH)\n", tbf_name(tbf)); |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 435 | } |
| 436 | bitvec *immediate_assignment = bitvec_alloc(22) /* without plen */; |
| 437 | bitvec_unhex(immediate_assignment, |
| 438 | "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
| 439 | if (sb) |
| 440 | plen = Encoding::write_immediate_assignment(&m_bts, immediate_assignment, 0, ra, |
| 441 | Fn, qta >> 2, m_bts.trx[trx].arfcn, ts, |
| 442 | m_bts.trx[trx].pdch[ts].tsc, 0, 0, 0, 0, sb_fn, 1, |
| 443 | m_bts.alpha, m_bts.gamma, -1); |
| 444 | else |
| 445 | plen = Encoding::write_immediate_assignment(&m_bts, immediate_assignment, 0, ra, |
Holger Hans Peter Freyther | fc498c9 | 2013-10-27 13:38:54 +0100 | [diff] [blame] | 446 | Fn, tbf->ta, tbf->trx->arfcn, tbf->first_ts, tbf->tsc, |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 447 | tbf->tfi(), tbf->dir.ul.usf[tbf->first_ts], 0, 0, 0, 0, |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 448 | m_bts.alpha, m_bts.gamma, -1); |
| 449 | pcu_l1if_tx_agch(immediate_assignment, plen); |
| 450 | bitvec_free(immediate_assignment); |
| 451 | |
| 452 | return 0; |
| 453 | } |
| 454 | |
Holger Hans Peter Freyther | 24c1a5b | 2013-10-26 20:27:44 +0200 | [diff] [blame] | 455 | /* depending on the current TBF, we assign on PACCH or AGCH */ |
| 456 | void BTS::trigger_dl_ass( |
| 457 | struct gprs_rlcmac_tbf *tbf, |
| 458 | struct gprs_rlcmac_tbf *old_tbf, const char *imsi) |
| 459 | { |
| 460 | /* stop pending timer */ |
| 461 | tbf->stop_timer(); |
| 462 | |
| 463 | /* check for downlink tbf: */ |
| 464 | if (old_tbf) { |
| 465 | LOGP(DRLCMAC, LOGL_DEBUG, "Send dowlink assignment on " |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 466 | "PACCH, because %s exists\n", tbf_name(old_tbf)); |
Holger Hans Peter Freyther | 24c1a5b | 2013-10-26 20:27:44 +0200 | [diff] [blame] | 467 | old_tbf->dl_ass_state = GPRS_RLCMAC_DL_ASS_SEND_ASS; |
| 468 | /* use TA from old TBF */ |
| 469 | tbf->ta = old_tbf->ta; |
| 470 | /* change state */ |
| 471 | tbf_new_state(tbf, GPRS_RLCMAC_ASSIGN); |
| 472 | tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_PACCH); |
| 473 | /* start timer */ |
| 474 | tbf_timer_start(tbf, 0, Tassign_pacch); |
| 475 | } else { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 476 | LOGP(DRLCMAC, LOGL_DEBUG, "Send dowlink assignment for %s on PCH, no TBF exist (IMSI=%s)\n", tbf_name(tbf), imsi); |
Holger Hans Peter Freyther | 24c1a5b | 2013-10-26 20:27:44 +0200 | [diff] [blame] | 477 | if (!imsi || strlen(imsi) < 3) { |
| 478 | LOGP(DRLCMAC, LOGL_ERROR, "No valid IMSI!\n"); |
| 479 | return; |
| 480 | } |
| 481 | /* change state */ |
| 482 | tbf_new_state(tbf, GPRS_RLCMAC_ASSIGN); |
| 483 | tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_CCCH); |
Holger Hans Peter Freyther | 5464c9b | 2013-10-27 20:57:35 +0100 | [diff] [blame] | 484 | tbf->assign_imsi(imsi); |
Holger Hans Peter Freyther | 24c1a5b | 2013-10-26 20:27:44 +0200 | [diff] [blame] | 485 | /* send immediate assignment */ |
| 486 | tbf->bts->snd_dl_ass(tbf, 0, imsi); |
| 487 | tbf->dir.dl.wait_confirm = 1; |
| 488 | } |
| 489 | } |
| 490 | |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 491 | void BTS::snd_dl_ass(gprs_rlcmac_tbf *tbf, uint8_t poll, const char *imsi) |
| 492 | { |
| 493 | int plen; |
| 494 | |
| 495 | debug_diagram(this, tbf->diag, "IMM.ASS (PCH)"); |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 496 | LOGP(DRLCMAC, LOGL_INFO, "TX: START %s Immediate Assignment Downlink (PCH)\n", tbf_name(tbf)); |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 497 | bitvec *immediate_assignment = bitvec_alloc(22); /* without plen */ |
| 498 | bitvec_unhex(immediate_assignment, "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
| 499 | /* use request reference that has maximum distance to current time, |
| 500 | * so the assignment will not conflict with possible RACH requests. */ |
| 501 | plen = Encoding::write_immediate_assignment(&m_bts, immediate_assignment, 1, 125, |
| 502 | (tbf->pdch[tbf->first_ts]->last_rts_fn + 21216) % 2715648, tbf->ta, |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 503 | tbf->trx->arfcn, tbf->first_ts, tbf->tsc, tbf->tfi(), 0, tbf->tlli(), poll, |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 504 | tbf->poll_fn, 0, m_bts.alpha, m_bts.gamma, -1); |
| 505 | pcu_l1if_tx_pch(immediate_assignment, plen, imsi); |
| 506 | bitvec_free(immediate_assignment); |
| 507 | } |
| 508 | |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 509 | |
| 510 | /* |
| 511 | * PDCH code below. TODO: move to a separate file |
| 512 | */ |
| 513 | |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 514 | void gprs_rlcmac_pdch::enable() |
| 515 | { |
| 516 | /* TODO: Check if there are still allocated resources.. */ |
| 517 | INIT_LLIST_HEAD(&paging_list); |
| 518 | m_is_enabled = 1; |
| 519 | } |
| 520 | |
| 521 | void gprs_rlcmac_pdch::disable() |
| 522 | { |
| 523 | /* TODO.. kick free_resources once we know the TRX/TS we are on */ |
| 524 | m_is_enabled = 0; |
| 525 | } |
| 526 | |
Holger Hans Peter Freyther | cedf890 | 2013-10-19 20:47:12 +0200 | [diff] [blame] | 527 | /* TODO: kill the parameter and make a pdch belong to a trx.. to a bts.. */ |
Holger Hans Peter Freyther | 09ef27a | 2013-10-20 16:37:05 +0200 | [diff] [blame] | 528 | void gprs_rlcmac_pdch::free_resources() |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 529 | { |
| 530 | struct gprs_rlcmac_paging *pag; |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 531 | |
| 532 | /* we are not enabled. there should be no resources */ |
| 533 | if (!is_enabled()) |
| 534 | return; |
| 535 | |
| 536 | /* kick all TBF on slot */ |
| 537 | gprs_rlcmac_tbf::free_all(this); |
| 538 | |
| 539 | /* flush all pending paging messages */ |
Holger Hans Peter Freyther | 24e98d0 | 2013-10-19 18:15:44 +0200 | [diff] [blame] | 540 | while ((pag = dequeue_paging())) |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 541 | talloc_free(pag); |
| 542 | |
Holger Hans Peter Freyther | 09ef27a | 2013-10-20 16:37:05 +0200 | [diff] [blame] | 543 | trx->bts->sba()->free_resources(this); |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 544 | } |
Holger Hans Peter Freyther | 24e98d0 | 2013-10-19 18:15:44 +0200 | [diff] [blame] | 545 | |
| 546 | struct gprs_rlcmac_paging *gprs_rlcmac_pdch::dequeue_paging() |
| 547 | { |
| 548 | struct gprs_rlcmac_paging *pag; |
| 549 | |
| 550 | if (llist_empty(&paging_list)) |
| 551 | return NULL; |
| 552 | pag = llist_entry(paging_list.next, struct gprs_rlcmac_paging, list); |
| 553 | llist_del(&pag->list); |
| 554 | |
| 555 | return pag; |
| 556 | } |
| 557 | |
| 558 | struct msgb *gprs_rlcmac_pdch::packet_paging_request() |
| 559 | { |
| 560 | struct gprs_rlcmac_paging *pag; |
| 561 | struct msgb *msg; |
| 562 | unsigned wp = 0, len; |
| 563 | |
| 564 | /* no paging, no message */ |
| 565 | pag = dequeue_paging(); |
| 566 | if (!pag) |
| 567 | return NULL; |
| 568 | |
| 569 | LOGP(DRLCMAC, LOGL_DEBUG, "Scheduling paging\n"); |
| 570 | |
| 571 | /* alloc message */ |
| 572 | msg = msgb_alloc(23, "pag ctrl block"); |
| 573 | if (!msg) { |
| 574 | talloc_free(pag); |
| 575 | return NULL; |
| 576 | } |
| 577 | bitvec *pag_vec = bitvec_alloc(23); |
| 578 | if (!pag_vec) { |
| 579 | msgb_free(msg); |
| 580 | talloc_free(pag); |
| 581 | return NULL; |
| 582 | } |
Holger Hans Peter Freyther | 63f29d6 | 2013-10-19 19:04:03 +0200 | [diff] [blame] | 583 | wp = Encoding::write_packet_paging_request(pag_vec); |
Holger Hans Peter Freyther | 24e98d0 | 2013-10-19 18:15:44 +0200 | [diff] [blame] | 584 | |
| 585 | /* loop until message is full */ |
| 586 | while (pag) { |
| 587 | /* try to add paging */ |
| 588 | if ((pag->identity_lv[1] & 0x07) == 4) { |
| 589 | /* TMSI */ |
| 590 | LOGP(DRLCMAC, LOGL_DEBUG, "- TMSI=0x%08x\n", |
| 591 | ntohl(*((uint32_t *)(pag->identity_lv + 1)))); |
| 592 | len = 1 + 1 + 1 + 32 + 2 + 1; |
| 593 | if (pag->identity_lv[0] != 5) { |
| 594 | LOGP(DRLCMAC, LOGL_ERROR, "TMSI paging with " |
| 595 | "MI != 5 octets!\n"); |
| 596 | goto continue_next; |
| 597 | } |
| 598 | } else { |
| 599 | /* MI */ |
| 600 | LOGP(DRLCMAC, LOGL_DEBUG, "- MI=%s\n", |
| 601 | osmo_hexdump(pag->identity_lv + 1, |
| 602 | pag->identity_lv[0])); |
| 603 | len = 1 + 1 + 1 + 4 + (pag->identity_lv[0]<<3) + 2 + 1; |
| 604 | if (pag->identity_lv[0] > 8) { |
| 605 | LOGP(DRLCMAC, LOGL_ERROR, "Paging with " |
| 606 | "MI > 8 octets!\n"); |
| 607 | goto continue_next; |
| 608 | } |
| 609 | } |
| 610 | if (wp + len > 184) { |
| 611 | LOGP(DRLCMAC, LOGL_DEBUG, "- Does not fit, so schedule " |
| 612 | "next time\n"); |
| 613 | /* put back paging record, because does not fit */ |
| 614 | llist_add_tail(&pag->list, &paging_list); |
| 615 | break; |
| 616 | } |
Holger Hans Peter Freyther | 63f29d6 | 2013-10-19 19:04:03 +0200 | [diff] [blame] | 617 | Encoding::write_repeated_page_info(pag_vec, wp, pag->identity_lv[0], |
Holger Hans Peter Freyther | 24e98d0 | 2013-10-19 18:15:44 +0200 | [diff] [blame] | 618 | pag->identity_lv + 1, pag->chan_needed); |
| 619 | |
| 620 | continue_next: |
| 621 | talloc_free(pag); |
| 622 | pag = dequeue_paging(); |
| 623 | } |
| 624 | |
| 625 | bitvec_pack(pag_vec, msgb_put(msg, 23)); |
| 626 | RlcMacDownlink_t * mac_control_block = (RlcMacDownlink_t *)talloc_zero(tall_pcu_ctx, RlcMacDownlink_t); |
| 627 | LOGP(DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ TX : Packet Paging Request +++++++++++++++++++++++++\n"); |
| 628 | decode_gsm_rlcmac_downlink(pag_vec, mac_control_block); |
| 629 | LOGPC(DCSN1, LOGL_NOTICE, "\n"); |
| 630 | LOGP(DRLCMAC, LOGL_DEBUG, "------------------------- TX : Packet Paging Request -------------------------\n"); |
| 631 | bitvec_free(pag_vec); |
| 632 | talloc_free(mac_control_block); |
| 633 | |
| 634 | return msg; |
| 635 | } |
| 636 | |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 637 | void gprs_rlcmac_pdch::add_paging(struct gprs_rlcmac_paging *pag) |
| 638 | { |
| 639 | llist_add(&pag->list, &paging_list); |
| 640 | } |
Holger Hans Peter Freyther | 9ae367f | 2013-10-26 16:42:38 +0200 | [diff] [blame] | 641 | |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 642 | /* receive UL data block |
| 643 | * |
| 644 | * The blocks are defragmented and forwarded as LLC frames, if complete. |
| 645 | */ |
Holger Hans Peter Freyther | 05f8efc | 2013-10-26 18:53:16 +0200 | [diff] [blame] | 646 | int gprs_rlcmac_pdch::rcv_data_block_acknowledged(uint8_t *data, uint8_t len, int8_t rssi) |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 647 | { |
| 648 | struct gprs_rlcmac_tbf *tbf; |
| 649 | struct rlc_ul_header *rh = (struct rlc_ul_header *)data; |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 650 | |
| 651 | switch (len) { |
| 652 | case 54: |
| 653 | /* omitting spare bits */ |
| 654 | len = 53; |
| 655 | break; |
| 656 | case 40: |
| 657 | /* omitting spare bits */ |
| 658 | len = 39; |
| 659 | break; |
| 660 | case 34: |
| 661 | /* omitting spare bits */ |
| 662 | len = 33; |
| 663 | break; |
| 664 | case 23: |
| 665 | break; |
| 666 | default: |
Holger Hans Peter Freyther | 1587764 | 2013-10-27 09:50:15 +0100 | [diff] [blame] | 667 | bts()->decode_error(); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 668 | LOGP(DRLCMACUL, LOGL_ERROR, "Dropping data block with invalid" |
| 669 | "length: %d)\n", len); |
| 670 | return -EINVAL; |
| 671 | } |
| 672 | |
| 673 | /* find TBF inst from given TFI */ |
Holger Hans Peter Freyther | f63cabd | 2013-10-26 19:10:43 +0200 | [diff] [blame] | 674 | tbf = bts()->tbf_by_tfi(rh->tfi, trx_no(), GPRS_RLCMAC_UL_TBF); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 675 | if (!tbf) { |
Holger Hans Peter Freyther | 15bb1a2 | 2013-10-27 12:30:46 +0100 | [diff] [blame] | 676 | LOGP(DRLCMACUL, LOGL_NOTICE, "UL DATA unknown TFI=%d\n", |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 677 | rh->tfi); |
| 678 | return 0; |
| 679 | } |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 680 | |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 681 | return tbf->rcv_data_block_acknowledged(data, len, rssi); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 682 | } |
| 683 | |
Holger Hans Peter Freyther | e1a075a | 2013-10-27 13:35:30 +0100 | [diff] [blame] | 684 | void gprs_rlcmac_pdch::rcv_control_ack(Packet_Control_Acknowledgement_t *packet, uint32_t fn) |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 685 | { |
| 686 | struct gprs_rlcmac_tbf *tbf; |
| 687 | uint32_t tlli = 0; |
| 688 | |
Holger Hans Peter Freyther | e1a075a | 2013-10-27 13:35:30 +0100 | [diff] [blame] | 689 | tlli = packet->TLLI; |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 690 | tbf = bts()->tbf_by_poll_fn(fn, trx_no(), ts_no); |
| 691 | if (!tbf) { |
| 692 | LOGP(DRLCMAC, LOGL_NOTICE, "PACKET CONTROL ACK with " |
Holger Hans Peter Freyther | 15bb1a2 | 2013-10-27 12:30:46 +0100 | [diff] [blame] | 693 | "unknown FN=%u TLLI=0x%08x (TRX %d TS %d)\n", |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 694 | fn, tlli, trx_no(), ts_no); |
| 695 | return; |
| 696 | } |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 697 | tbf->update_tlli(tlli); |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 698 | LOGP(DRLCMAC, LOGL_DEBUG, "RX: [PCU <- BTS] %s Packet Control Ack\n", tbf_name(tbf)); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 699 | tbf->poll_state = GPRS_RLCMAC_POLL_NONE; |
| 700 | |
| 701 | /* check if this control ack belongs to packet uplink ack */ |
| 702 | if (tbf->ul_ack_state == GPRS_RLCMAC_UL_ACK_WAIT_ACK) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 703 | LOGP(DRLCMAC, LOGL_DEBUG, "TBF: [UPLINK] END %s\n", tbf_name(tbf)); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 704 | tbf->ul_ack_state = GPRS_RLCMAC_UL_ACK_NONE; |
| 705 | debug_diagram(bts(), tbf->diag, "got CTL-ACK (fin)"); |
| 706 | if ((tbf->state_flags & |
| 707 | (1 << GPRS_RLCMAC_FLAG_TO_UL_ACK))) { |
| 708 | tbf->state_flags &= |
| 709 | ~(1 << GPRS_RLCMAC_FLAG_TO_UL_ACK); |
| 710 | LOGP(DRLCMAC, LOGL_NOTICE, "Recovered uplink " |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 711 | "ack for UL %s\n", tbf_name(tbf)); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 712 | } |
| 713 | tbf_free(tbf); |
| 714 | return; |
| 715 | } |
| 716 | if (tbf->dl_ass_state == GPRS_RLCMAC_DL_ASS_WAIT_ACK) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 717 | LOGP(DRLCMAC, LOGL_DEBUG, "TBF: [UPLINK] DOWNLINK ASSIGNED %s\n", tbf_name(tbf)); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 718 | /* reset N3105 */ |
| 719 | tbf->n3105 = 0; |
| 720 | tbf->dl_ass_state = GPRS_RLCMAC_DL_ASS_NONE; |
| 721 | debug_diagram(bts(), tbf->diag, "got CTL-ACK DL-ASS"); |
| 722 | if (tbf->direction == GPRS_RLCMAC_UL_TBF) |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 723 | tbf = bts()->tbf_by_tlli(tbf->tlli(), |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 724 | GPRS_RLCMAC_DL_TBF); |
Holger Hans Peter Freyther | 875fc89 | 2013-10-27 13:35:46 +0100 | [diff] [blame] | 725 | #warning "TBF is changing on the way... *sigh*" |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 726 | if (!tbf) { |
| 727 | LOGP(DRLCMAC, LOGL_ERROR, "Got ACK, but DL " |
Holger Hans Peter Freyther | 875fc89 | 2013-10-27 13:35:46 +0100 | [diff] [blame] | 728 | "TBF is gone TLLI=0x%08x\n", tlli); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 729 | return; |
| 730 | } |
| 731 | tbf_new_state(tbf, GPRS_RLCMAC_FLOW); |
| 732 | /* stop pending assignment timer */ |
| 733 | tbf->stop_timer(); |
| 734 | if ((tbf->state_flags & |
| 735 | (1 << GPRS_RLCMAC_FLAG_TO_DL_ASS))) { |
| 736 | tbf->state_flags &= |
| 737 | ~(1 << GPRS_RLCMAC_FLAG_TO_DL_ASS); |
| 738 | LOGP(DRLCMAC, LOGL_NOTICE, "Recovered downlink " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 739 | "assignment for %s\n", tbf_name(tbf)); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 740 | } |
| 741 | tbf_assign_control_ts(tbf); |
| 742 | return; |
| 743 | } |
| 744 | if (tbf->ul_ass_state == GPRS_RLCMAC_UL_ASS_WAIT_ACK) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 745 | LOGP(DRLCMAC, LOGL_DEBUG, "TBF: [DOWNLINK] UPLINK ASSIGNED %s\n", tbf_name(tbf)); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 746 | /* reset N3105 */ |
| 747 | tbf->n3105 = 0; |
| 748 | tbf->ul_ass_state = GPRS_RLCMAC_UL_ASS_NONE; |
| 749 | debug_diagram(bts(), tbf->diag, "got CTL-AC UL-ASS"); |
| 750 | #warning "TBF is changing on the way... *sigh*" |
| 751 | if (tbf->direction == GPRS_RLCMAC_DL_TBF) |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 752 | tbf = bts()->tbf_by_tlli(tbf->tlli(), |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 753 | GPRS_RLCMAC_UL_TBF); |
| 754 | if (!tbf) { |
| 755 | LOGP(DRLCMAC, LOGL_ERROR, "Got ACK, but UL " |
Holger Hans Peter Freyther | 8d0e489 | 2013-10-27 12:42:58 +0100 | [diff] [blame] | 756 | "TBF is gone TLLI=0x%08x\n", tlli); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 757 | return; |
| 758 | } |
| 759 | tbf_new_state(tbf, GPRS_RLCMAC_FLOW); |
| 760 | if ((tbf->state_flags & |
| 761 | (1 << GPRS_RLCMAC_FLAG_TO_UL_ASS))) { |
| 762 | tbf->state_flags &= |
| 763 | ~(1 << GPRS_RLCMAC_FLAG_TO_UL_ASS); |
| 764 | LOGP(DRLCMAC, LOGL_NOTICE, "Recovered uplink " |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 765 | "assignment for UL %s\n", tbf_name(tbf)); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 766 | } |
| 767 | tbf_assign_control_ts(tbf); |
| 768 | return; |
| 769 | } |
| 770 | LOGP(DRLCMAC, LOGL_ERROR, "Error: received PACET CONTROL ACK " |
| 771 | "at no request\n"); |
| 772 | } |
| 773 | |
Holger Hans Peter Freyther | 5da2014 | 2013-10-27 11:41:01 +0100 | [diff] [blame] | 774 | void gprs_rlcmac_pdch::rcv_control_dl_ack_nack(Packet_Downlink_Ack_Nack_t *ack_nack, uint32_t fn) |
Holger Hans Peter Freyther | 5a96581 | 2013-10-27 11:07:17 +0100 | [diff] [blame] | 775 | { |
| 776 | int8_t tfi = 0; /* must be signed */ |
| 777 | struct gprs_rlcmac_tbf *tbf; |
| 778 | int rc; |
| 779 | |
Holger Hans Peter Freyther | 5da2014 | 2013-10-27 11:41:01 +0100 | [diff] [blame] | 780 | tfi = ack_nack->DOWNLINK_TFI; |
Holger Hans Peter Freyther | 5a96581 | 2013-10-27 11:07:17 +0100 | [diff] [blame] | 781 | tbf = bts()->tbf_by_poll_fn(fn, trx_no(), ts_no); |
| 782 | if (!tbf) { |
| 783 | LOGP(DRLCMAC, LOGL_NOTICE, "PACKET DOWNLINK ACK with " |
| 784 | "unknown FN=%u TFI=%d (TRX %d TS %d)\n", |
| 785 | fn, tfi, trx_no(), ts_no); |
| 786 | return; |
| 787 | } |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 788 | if (tbf->tfi() != tfi) { |
Holger Hans Peter Freyther | 5a96581 | 2013-10-27 11:07:17 +0100 | [diff] [blame] | 789 | LOGP(DRLCMAC, LOGL_NOTICE, "PACKET DOWNLINK ACK with " |
| 790 | "wrong TFI=%d, ignoring!\n", tfi); |
| 791 | return; |
| 792 | } |
| 793 | tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_DL_ACK); |
| 794 | if ((tbf->state_flags & (1 << GPRS_RLCMAC_FLAG_TO_DL_ACK))) { |
| 795 | tbf->state_flags &= ~(1 << GPRS_RLCMAC_FLAG_TO_DL_ACK); |
| 796 | LOGP(DRLCMAC, LOGL_NOTICE, "Recovered downlink ack " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 797 | "for %s\n", tbf_name(tbf)); |
Holger Hans Peter Freyther | 5a96581 | 2013-10-27 11:07:17 +0100 | [diff] [blame] | 798 | } |
| 799 | /* reset N3105 */ |
| 800 | tbf->n3105 = 0; |
| 801 | tbf->stop_t3191(); |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 802 | LOGP(DRLCMAC, LOGL_DEBUG, "RX: [PCU <- BTS] %s Packet Downlink Ack/Nack\n", tbf_name(tbf)); |
Holger Hans Peter Freyther | 5a96581 | 2013-10-27 11:07:17 +0100 | [diff] [blame] | 803 | tbf->poll_state = GPRS_RLCMAC_POLL_NONE; |
| 804 | debug_diagram(bts(), tbf->diag, "got DL-ACK"); |
| 805 | |
| 806 | rc = tbf->snd_dl_ack( |
Holger Hans Peter Freyther | 5da2014 | 2013-10-27 11:41:01 +0100 | [diff] [blame] | 807 | ack_nack->Ack_Nack_Description.FINAL_ACK_INDICATION, |
| 808 | ack_nack->Ack_Nack_Description.STARTING_SEQUENCE_NUMBER, |
| 809 | ack_nack->Ack_Nack_Description.RECEIVED_BLOCK_BITMAP); |
Holger Hans Peter Freyther | 5a96581 | 2013-10-27 11:07:17 +0100 | [diff] [blame] | 810 | if (rc == 1) { |
| 811 | tbf_free(tbf); |
| 812 | return; |
| 813 | } |
| 814 | /* check for channel request */ |
Holger Hans Peter Freyther | 5da2014 | 2013-10-27 11:41:01 +0100 | [diff] [blame] | 815 | if (ack_nack->Exist_Channel_Request_Description) { |
Holger Hans Peter Freyther | 5a96581 | 2013-10-27 11:07:17 +0100 | [diff] [blame] | 816 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF in ack " |
| 817 | "message, so we provide one:\n"); |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 818 | tbf_alloc_ul(bts_data(), tbf->trx->trx_no, tbf->ms_class, tbf->tlli(), tbf->ta, tbf); |
Holger Hans Peter Freyther | 5a96581 | 2013-10-27 11:07:17 +0100 | [diff] [blame] | 819 | /* schedule uplink assignment */ |
| 820 | tbf->ul_ass_state = GPRS_RLCMAC_UL_ASS_SEND_ASS; |
| 821 | } |
| 822 | } |
| 823 | |
Holger Hans Peter Freyther | 7a34471 | 2013-10-27 11:37:53 +0100 | [diff] [blame] | 824 | void gprs_rlcmac_pdch::rcv_resource_request(Packet_Resource_Request_t *request, uint32_t fn) |
Holger Hans Peter Freyther | fcbc702 | 2013-10-26 17:38:37 +0200 | [diff] [blame] | 825 | { |
Holger Hans Peter Freyther | fcbc702 | 2013-10-26 17:38:37 +0200 | [diff] [blame] | 826 | struct gprs_rlcmac_tbf *tbf; |
| 827 | struct gprs_rlcmac_sba *sba; |
| 828 | int rc; |
| 829 | |
Holger Hans Peter Freyther | 7a34471 | 2013-10-27 11:37:53 +0100 | [diff] [blame] | 830 | if (request->ID.UnionType) { |
Holger Hans Peter Freyther | 8021644 | 2013-10-27 15:42:25 +0100 | [diff] [blame] | 831 | uint32_t tlli = request->ID.u.TLLI; |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 832 | uint8_t ms_class = 0; |
| 833 | struct gprs_rlcmac_tbf *dl_tbf; |
| 834 | uint8_t ta; |
| 835 | |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 836 | tbf = bts()->tbf_by_tlli(tlli, GPRS_RLCMAC_UL_TBF); |
| 837 | if (tbf) { |
| 838 | LOGP(DRLCMACUL, LOGL_NOTICE, "Got RACH from " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 839 | "TLLI=0x%08x while %s still " |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 840 | "exists. Killing pending DL TBF\n", |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 841 | tlli, tbf_name(tbf)); |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 842 | tbf_free(tbf); |
| 843 | tbf = NULL; |
| 844 | } |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 845 | |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 846 | if ((dl_tbf = bts()->tbf_by_tlli(tlli, GPRS_RLCMAC_DL_TBF))) { |
| 847 | LOGP(DRLCMACUL, LOGL_NOTICE, "Got RACH from " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 848 | "TLLI=0x%08x while %s still exists. " |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 849 | "Killing pending DL TBF\n", tlli, |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 850 | tbf_name(dl_tbf)); |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 851 | tbf_free(dl_tbf); |
| 852 | } |
| 853 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF " |
| 854 | "in packet resource request of single " |
| 855 | "block, so we provide one:\n"); |
| 856 | sba = bts()->sba()->find(this, fn); |
| 857 | if (!sba) { |
| 858 | LOGP(DRLCMAC, LOGL_NOTICE, "MS requests UL TBF " |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 859 | "in packet resource request of single " |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 860 | "block, but there is no resource request " |
| 861 | "scheduled!\n"); |
| 862 | rc = bts()->timing_advance()->recall(tlli); |
| 863 | if (rc >= 0) |
| 864 | ta = rc; |
| 865 | else |
| 866 | ta = 0; |
| 867 | } else { |
| 868 | ta = sba->ta; |
| 869 | bts()->timing_advance()->remember(tlli, ta); |
| 870 | bts()->sba()->free_sba(sba); |
| 871 | } |
| 872 | if (request->Exist_MS_Radio_Access_capability) |
| 873 | ms_class = Decoding::get_ms_class_by_capability(&request->MS_Radio_Access_capability); |
| 874 | if (!ms_class) |
| 875 | LOGP(DRLCMAC, LOGL_NOTICE, "MS does not give us a class.\n"); |
| 876 | tbf = tbf_alloc_ul(bts_data(), trx_no(), ms_class, tlli, ta, NULL); |
| 877 | if (!tbf) |
| 878 | return; |
| 879 | /* set control ts to current MS's TS, until assignment complete */ |
| 880 | LOGP(DRLCMAC, LOGL_DEBUG, "Change control TS to %d until assinment is complete.\n", ts_no); |
| 881 | tbf->control_ts = ts_no; |
| 882 | /* schedule uplink assignment */ |
| 883 | tbf->ul_ass_state = GPRS_RLCMAC_UL_ASS_SEND_ASS; |
| 884 | debug_diagram(bts->bts, tbf->diag, "Res. REQ"); |
| 885 | return; |
| 886 | } |
| 887 | |
| 888 | if (request->ID.u.Global_TFI.UnionType) { |
| 889 | int8_t tfi = request->ID.u.Global_TFI.u.DOWNLINK_TFI; |
| 890 | tbf = bts()->tbf_by_tfi(tfi, trx_no(), GPRS_RLCMAC_DL_TBF); |
| 891 | if (!tbf) { |
| 892 | LOGP(DRLCMAC, LOGL_NOTICE, "PACKET RESSOURCE REQ unknown downlink TFI=%d\n", tfi); |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 893 | return; |
| 894 | } |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 895 | } else { |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 896 | int8_t tfi = request->ID.u.Global_TFI.u.UPLINK_TFI; |
| 897 | tbf = bts()->tbf_by_tfi(tfi, trx_no(), GPRS_RLCMAC_UL_TBF); |
| 898 | if (!tbf) { |
| 899 | LOGP(DRLCMAC, LOGL_NOTICE, "PACKET RESSOURCE REQ unknown uplink TFI=%d\n", tfi); |
| 900 | return; |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 901 | } |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 902 | } |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 903 | |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 904 | LOGP(DRLCMAC, LOGL_ERROR, "RX: [PCU <- BTS] %s FIXME: Packet resource request\n", tbf_name(tbf)); |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 905 | } |
| 906 | |
Holger Hans Peter Freyther | cb5c49b | 2013-10-27 11:19:13 +0100 | [diff] [blame] | 907 | void gprs_rlcmac_pdch::rcv_measurement_report(Packet_Measurement_Report_t *report, uint32_t fn) |
Holger Hans Peter Freyther | 750ca67 | 2013-10-27 11:16:20 +0100 | [diff] [blame] | 908 | { |
| 909 | struct gprs_rlcmac_sba *sba; |
| 910 | |
| 911 | sba = bts()->sba()->find(this, fn); |
| 912 | if (!sba) { |
| 913 | LOGP(DRLCMAC, LOGL_NOTICE, "MS send measurement " |
| 914 | "in packet resource request of single " |
| 915 | "block, but there is no resource request " |
Holger Hans Peter Freyther | 53a336f | 2013-10-27 12:47:48 +0100 | [diff] [blame] | 916 | "scheduled! TLLI=0x%08x\n", report->TLLI); |
Holger Hans Peter Freyther | 750ca67 | 2013-10-27 11:16:20 +0100 | [diff] [blame] | 917 | } else { |
Holger Hans Peter Freyther | cb5c49b | 2013-10-27 11:19:13 +0100 | [diff] [blame] | 918 | bts()->timing_advance()->remember(report->TLLI, sba->ta); |
Holger Hans Peter Freyther | 750ca67 | 2013-10-27 11:16:20 +0100 | [diff] [blame] | 919 | bts()->sba()->free_sba(sba); |
| 920 | } |
Holger Hans Peter Freyther | cb5c49b | 2013-10-27 11:19:13 +0100 | [diff] [blame] | 921 | gprs_rlcmac_meas_rep(report); |
Holger Hans Peter Freyther | 750ca67 | 2013-10-27 11:16:20 +0100 | [diff] [blame] | 922 | } |
| 923 | |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 924 | /* Received Uplink RLC control block. */ |
| 925 | int gprs_rlcmac_pdch::rcv_control_block( |
| 926 | bitvec *rlc_block, uint32_t fn) |
| 927 | { |
Holger Hans Peter Freyther | fcbc702 | 2013-10-26 17:38:37 +0200 | [diff] [blame] | 928 | RlcMacUplink_t * ul_control_block = (RlcMacUplink_t *)talloc_zero(tall_pcu_ctx, RlcMacUplink_t); |
| 929 | LOGP(DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ RX : Uplink Control Block +++++++++++++++++++++++++\n"); |
| 930 | decode_gsm_rlcmac_uplink(rlc_block, ul_control_block); |
| 931 | LOGPC(DCSN1, LOGL_NOTICE, "\n"); |
| 932 | LOGP(DRLCMAC, LOGL_DEBUG, "------------------------- RX : Uplink Control Block -------------------------\n"); |
| 933 | switch (ul_control_block->u.MESSAGE_TYPE) { |
| 934 | case MT_PACKET_CONTROL_ACK: |
Holger Hans Peter Freyther | e1a075a | 2013-10-27 13:35:30 +0100 | [diff] [blame] | 935 | rcv_control_ack(&ul_control_block->u.Packet_Control_Acknowledgement, fn); |
Holger Hans Peter Freyther | fcbc702 | 2013-10-26 17:38:37 +0200 | [diff] [blame] | 936 | break; |
| 937 | case MT_PACKET_DOWNLINK_ACK_NACK: |
Holger Hans Peter Freyther | 5da2014 | 2013-10-27 11:41:01 +0100 | [diff] [blame] | 938 | rcv_control_dl_ack_nack(&ul_control_block->u.Packet_Downlink_Ack_Nack, fn); |
Holger Hans Peter Freyther | fcbc702 | 2013-10-26 17:38:37 +0200 | [diff] [blame] | 939 | break; |
| 940 | case MT_PACKET_RESOURCE_REQUEST: |
Holger Hans Peter Freyther | 7a34471 | 2013-10-27 11:37:53 +0100 | [diff] [blame] | 941 | rcv_resource_request(&ul_control_block->u.Packet_Resource_Request, fn); |
Holger Hans Peter Freyther | fcbc702 | 2013-10-26 17:38:37 +0200 | [diff] [blame] | 942 | break; |
| 943 | case MT_PACKET_MEASUREMENT_REPORT: |
Holger Hans Peter Freyther | cb5c49b | 2013-10-27 11:19:13 +0100 | [diff] [blame] | 944 | rcv_measurement_report(&ul_control_block->u.Packet_Measurement_Report, fn); |
Holger Hans Peter Freyther | fcbc702 | 2013-10-26 17:38:37 +0200 | [diff] [blame] | 945 | break; |
Holger Hans Peter Freyther | c1ae226 | 2013-10-27 10:50:35 +0100 | [diff] [blame] | 946 | case MT_PACKET_UPLINK_DUMMY_CONTROL_BLOCK: |
| 947 | /* ignoring it. change the SI to not force sending these? */ |
| 948 | break; |
Holger Hans Peter Freyther | fcbc702 | 2013-10-26 17:38:37 +0200 | [diff] [blame] | 949 | default: |
Holger Hans Peter Freyther | 1587764 | 2013-10-27 09:50:15 +0100 | [diff] [blame] | 950 | bts()->decode_error(); |
Holger Hans Peter Freyther | 180def9 | 2013-10-27 10:36:37 +0100 | [diff] [blame] | 951 | LOGP(DRLCMAC, LOGL_NOTICE, |
| 952 | "RX: [PCU <- BTS] unknown control block(%d) received\n", |
| 953 | ul_control_block->u.MESSAGE_TYPE); |
Holger Hans Peter Freyther | fcbc702 | 2013-10-26 17:38:37 +0200 | [diff] [blame] | 954 | } |
| 955 | talloc_free(ul_control_block); |
| 956 | return 1; |
| 957 | } |
| 958 | |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 959 | |
Holger Hans Peter Freyther | 6f9f434 | 2013-10-26 16:54:10 +0200 | [diff] [blame] | 960 | /* received RLC/MAC block from L1 */ |
Holger Hans Peter Freyther | 9ae367f | 2013-10-26 16:42:38 +0200 | [diff] [blame] | 961 | int gprs_rlcmac_pdch::rcv_block(uint8_t *data, uint8_t len, uint32_t fn, int8_t rssi) |
| 962 | { |
Holger Hans Peter Freyther | 6f9f434 | 2013-10-26 16:54:10 +0200 | [diff] [blame] | 963 | unsigned payload = data[0] >> 6; |
Holger Hans Peter Freyther | 6f9f434 | 2013-10-26 16:54:10 +0200 | [diff] [blame] | 964 | bitvec *block; |
| 965 | int rc = 0; |
| 966 | |
| 967 | switch (payload) { |
| 968 | case GPRS_RLCMAC_DATA_BLOCK: |
Holger Hans Peter Freyther | 05f8efc | 2013-10-26 18:53:16 +0200 | [diff] [blame] | 969 | rc = rcv_data_block_acknowledged(data, len, rssi); |
Holger Hans Peter Freyther | 6f9f434 | 2013-10-26 16:54:10 +0200 | [diff] [blame] | 970 | break; |
| 971 | case GPRS_RLCMAC_CONTROL_BLOCK: |
| 972 | block = bitvec_alloc(len); |
| 973 | if (!block) |
| 974 | return -ENOMEM; |
| 975 | bitvec_unpack(block, data); |
Holger Hans Peter Freyther | 05f8efc | 2013-10-26 18:53:16 +0200 | [diff] [blame] | 976 | rc = rcv_control_block(block, fn); |
Holger Hans Peter Freyther | 6f9f434 | 2013-10-26 16:54:10 +0200 | [diff] [blame] | 977 | bitvec_free(block); |
| 978 | break; |
| 979 | case GPRS_RLCMAC_CONTROL_BLOCK_OPT: |
| 980 | LOGP(DRLCMAC, LOGL_NOTICE, "GPRS_RLCMAC_CONTROL_BLOCK_OPT block payload is not supported.\n"); |
| 981 | break; |
| 982 | default: |
| 983 | LOGP(DRLCMAC, LOGL_NOTICE, "Unknown RLCMAC block payload(%u).\n", payload); |
| 984 | rc = -EINVAL; |
| 985 | } |
| 986 | |
| 987 | return rc; |
Holger Hans Peter Freyther | 9ae367f | 2013-10-26 16:42:38 +0200 | [diff] [blame] | 988 | } |