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 "}, |
Holger Hans Peter Freyther | aa35ba7 | 2013-11-13 15:02:50 +0100 | [diff] [blame] | 56 | { "tbf.reused", "TBF Reused "}, |
Holger Hans Peter Freyther | e9429b5 | 2013-11-13 19:36:57 +0100 | [diff] [blame] | 57 | { "rlc.sent", "RLC Sent "}, |
| 58 | { "rlc.resent", "RLC Resent "}, |
Holger Hans Peter Freyther | ef93bdb | 2013-11-24 00:01:50 +0100 | [diff] [blame] | 59 | { "rlc.restarted", "RLC Restarted "}, |
Holger Hans Peter Freyther | c70aae4 | 2013-11-19 17:09:37 +0100 | [diff] [blame] | 60 | { "rlc.stalled", "RLC Stalled "}, |
Holger Hans Peter Freyther | 092478f | 2013-11-23 01:01:19 +0100 | [diff] [blame] | 61 | { "rlc.nacked", "RLC Nacked "}, |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 62 | { "decode.errors", "Decode Errors "}, |
Holger Hans Peter Freyther | 93e048f | 2013-10-27 10:00:47 +0100 | [diff] [blame] | 63 | { "sba.allocated", "SBA Allocated "}, |
| 64 | { "sba.freed", "SBA Freed "}, |
| 65 | { "sba.timedout", "SBA Timeout "}, |
Holger Hans Peter Freyther | 1997787 | 2013-10-27 10:34:31 +0100 | [diff] [blame] | 66 | { "llc.timeout", "Timedout Frames "}, |
| 67 | { "llc.dropped", "Dropped Frames "}, |
Holger Hans Peter Freyther | b3d5ee2 | 2013-11-13 16:43:26 +0100 | [diff] [blame] | 68 | { "llc.scheduled", "Scheduled Frames "}, |
Holger Hans Peter Freyther | c1ae226 | 2013-10-27 10:50:35 +0100 | [diff] [blame] | 69 | { "rach.requests", "RACH requests "}, |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 70 | }; |
| 71 | |
| 72 | static const struct rate_ctr_group_desc bts_ctrg_desc = { |
| 73 | "bts", |
| 74 | "BTS Statistics", |
| 75 | ARRAY_SIZE(bts_ctr_description), |
| 76 | bts_ctr_description, |
| 77 | }; |
| 78 | |
Holger Hans Peter Freyther | b6acfda | 2013-10-17 19:41:11 +0200 | [diff] [blame] | 79 | BTS* BTS::main_bts() |
| 80 | { |
| 81 | return &s_bts; |
| 82 | } |
| 83 | |
| 84 | struct gprs_rlcmac_bts *BTS::bts_data() |
| 85 | { |
| 86 | return &m_bts; |
| 87 | } |
| 88 | |
| 89 | struct gprs_rlcmac_bts *bts_main_data() |
| 90 | { |
| 91 | return BTS::main_bts()->bts_data(); |
| 92 | } |
| 93 | |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 94 | struct rate_ctr_group *bts_main_data_stats() |
| 95 | { |
| 96 | return BTS::main_bts()->rate_counters(); |
| 97 | } |
| 98 | |
Holger Hans Peter Freyther | b6acfda | 2013-10-17 19:41:11 +0200 | [diff] [blame] | 99 | BTS::BTS() |
Holger Hans Peter Freyther | 9b30c7f | 2013-10-17 19:59:56 +0200 | [diff] [blame] | 100 | : m_cur_fn(0) |
Holger Hans Peter Freyther | b78adcd | 2013-10-17 20:12:37 +0200 | [diff] [blame] | 101 | , m_pollController(*this) |
Holger Hans Peter Freyther | cedf890 | 2013-10-19 20:47:12 +0200 | [diff] [blame] | 102 | , m_sba(*this) |
Holger Hans Peter Freyther | b6acfda | 2013-10-17 19:41:11 +0200 | [diff] [blame] | 103 | { |
| 104 | memset(&m_bts, 0, sizeof(m_bts)); |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 105 | INIT_LLIST_HEAD(&m_bts.ul_tbfs); |
| 106 | INIT_LLIST_HEAD(&m_bts.dl_tbfs); |
Holger Hans Peter Freyther | b6acfda | 2013-10-17 19:41:11 +0200 | [diff] [blame] | 107 | m_bts.bts = this; |
Holger Hans Peter Freyther | 4ed1dae | 2013-10-20 10:14:03 +0200 | [diff] [blame] | 108 | |
| 109 | /* initialize back pointers */ |
| 110 | for (size_t trx_no = 0; trx_no < ARRAY_SIZE(m_bts.trx); ++trx_no) { |
| 111 | struct gprs_rlcmac_trx *trx = &m_bts.trx[trx_no]; |
| 112 | trx->trx_no = trx_no; |
| 113 | trx->bts = this; |
| 114 | |
| 115 | for (size_t ts_no = 0; ts_no < ARRAY_SIZE(trx->pdch); ++ts_no) { |
| 116 | struct gprs_rlcmac_pdch *pdch = &trx->pdch[ts_no]; |
| 117 | pdch->ts_no = ts_no; |
| 118 | pdch->trx = trx; |
| 119 | } |
| 120 | } |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 121 | |
| 122 | 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] | 123 | } |
Holger Hans Peter Freyther | 9b30c7f | 2013-10-17 19:59:56 +0200 | [diff] [blame] | 124 | |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 125 | BTS::~BTS() |
| 126 | { |
| 127 | rate_ctr_group_free(m_ratectrs); |
| 128 | } |
| 129 | |
| 130 | |
Holger Hans Peter Freyther | 9b30c7f | 2013-10-17 19:59:56 +0200 | [diff] [blame] | 131 | void BTS::set_current_frame_number(int fn) |
| 132 | { |
| 133 | m_cur_fn = fn; |
Holger Hans Peter Freyther | b78adcd | 2013-10-17 20:12:37 +0200 | [diff] [blame] | 134 | m_pollController.expireTimedout(m_cur_fn); |
Holger Hans Peter Freyther | 9b30c7f | 2013-10-17 19:59:56 +0200 | [diff] [blame] | 135 | } |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 136 | |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 137 | int BTS::add_paging(uint8_t chan_needed, uint8_t *identity_lv) |
| 138 | { |
| 139 | uint8_t l, trx, ts, any_tbf = 0; |
| 140 | struct gprs_rlcmac_tbf *tbf; |
| 141 | struct gprs_rlcmac_paging *pag; |
| 142 | uint8_t slot_mask[8]; |
| 143 | int8_t first_ts; /* must be signed */ |
| 144 | |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 145 | llist_head *tbfs_lists[] = { |
| 146 | &m_bts.ul_tbfs, |
| 147 | &m_bts.dl_tbfs, |
| 148 | NULL |
| 149 | }; |
| 150 | |
| 151 | |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 152 | LOGP(DRLCMAC, LOGL_INFO, "Add RR paging: chan-needed=%d MI=%s\n", |
| 153 | chan_needed, osmo_hexdump(identity_lv + 1, identity_lv[0])); |
| 154 | |
| 155 | /* collect slots to page |
| 156 | * Mark slots for every TBF, but only mark one of it. |
| 157 | * Mark only the first slot found. |
| 158 | * Don't mark, if TBF uses a different slot that is already marked. */ |
| 159 | memset(slot_mask, 0, sizeof(slot_mask)); |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 160 | for (l = 0; tbfs_lists[l]; l++) { |
| 161 | llist_for_each_entry(tbf, tbfs_lists[l], list) { |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 162 | first_ts = -1; |
| 163 | for (ts = 0; ts < 8; ts++) { |
| 164 | if (tbf->pdch[ts]) { |
| 165 | /* remember the first slot found */ |
| 166 | if (first_ts < 0) |
| 167 | first_ts = ts; |
| 168 | /* break, if we already marked a slot */ |
Holger Hans Peter Freyther | ec80f82 | 2013-10-27 13:44:37 +0100 | [diff] [blame] | 169 | if ((slot_mask[tbf->trx->trx_no] & (1 << ts))) |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 170 | break; |
| 171 | } |
| 172 | } |
| 173 | /* mark first slot found, if none is marked already */ |
| 174 | if (ts == 8 && first_ts >= 0) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 175 | LOGP(DRLCMAC, LOGL_DEBUG, "- %s uses " |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 176 | "TRX=%d TS=%d, so we mark\n", |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 177 | tbf_name(tbf), |
| 178 | tbf->trx->trx_no, first_ts); |
Holger Hans Peter Freyther | ec80f82 | 2013-10-27 13:44:37 +0100 | [diff] [blame] | 179 | slot_mask[tbf->trx->trx_no] |= (1 << first_ts); |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 180 | } else |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 181 | LOGP(DRLCMAC, LOGL_DEBUG, "- %s uses " |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 182 | "already marked TRX=%d TS=%d\n", |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 183 | tbf_name(tbf), |
| 184 | tbf->trx->trx_no, ts); |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 185 | } |
| 186 | } |
| 187 | |
| 188 | /* Now we have a list of marked slots. Every TBF uses at least one |
| 189 | * of these slots. */ |
| 190 | |
| 191 | /* schedule paging to all marked slots */ |
| 192 | for (trx = 0; trx < 8; trx++) { |
| 193 | if (slot_mask[trx] == 0) |
| 194 | continue; |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 195 | for (ts = 0; ts < 8; ts++) { |
| 196 | if ((slot_mask[trx] & (1 << ts))) { |
| 197 | /* schedule */ |
| 198 | pag = talloc_zero(tall_pcu_ctx, |
| 199 | struct gprs_rlcmac_paging); |
| 200 | if (!pag) |
| 201 | return -ENOMEM; |
| 202 | pag->chan_needed = chan_needed; |
| 203 | memcpy(pag->identity_lv, identity_lv, |
| 204 | identity_lv[0] + 1); |
| 205 | m_bts.trx[trx].pdch[ts].add_paging(pag); |
| 206 | LOGP(DRLCMAC, LOGL_INFO, "Paging on PACCH of " |
| 207 | "TRX=%d TS=%d\n", trx, ts); |
Holger Hans Peter Freyther | 9446485 | 2013-10-19 18:33:52 +0200 | [diff] [blame] | 208 | any_tbf = 1; |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 209 | } |
| 210 | } |
| 211 | } |
| 212 | |
| 213 | if (!any_tbf) |
| 214 | LOGP(DRLCMAC, LOGL_INFO, "No paging, because no TBF\n"); |
| 215 | |
| 216 | return 0; |
| 217 | } |
| 218 | |
Daniel Willmann | b59d61b | 2014-07-02 17:58:14 +0200 | [diff] [blame] | 219 | /* search for active downlink tbf */ |
| 220 | gprs_rlcmac_tbf *BTS::dl_tbf_by_tlli(uint32_t tlli) |
| 221 | { |
| 222 | return tbf_by_tlli(tlli, GPRS_RLCMAC_DL_TBF); |
| 223 | } |
| 224 | |
| 225 | /* search for active uplink tbf */ |
| 226 | gprs_rlcmac_tbf *BTS::ul_tbf_by_tlli(uint32_t tlli) |
| 227 | { |
| 228 | return tbf_by_tlli(tlli, GPRS_RLCMAC_UL_TBF); |
| 229 | } |
| 230 | |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 231 | /* search for active downlink or uplink tbf */ |
| 232 | gprs_rlcmac_tbf *BTS::tbf_by_tlli(uint32_t tlli, enum gprs_rlcmac_tbf_direction dir) |
| 233 | { |
| 234 | struct gprs_rlcmac_tbf *tbf; |
| 235 | if (dir == GPRS_RLCMAC_UL_TBF) { |
| 236 | llist_for_each_entry(tbf, &m_bts.ul_tbfs, list) { |
| 237 | if (tbf->state_is_not(GPRS_RLCMAC_RELEASING) |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 238 | && tbf->tlli() == tlli && tbf->is_tlli_valid()) |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 239 | return tbf; |
| 240 | } |
| 241 | } else { |
| 242 | llist_for_each_entry(tbf, &m_bts.dl_tbfs, list) { |
| 243 | if (tbf->state_is_not(GPRS_RLCMAC_RELEASING) |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 244 | && tbf->tlli() == tlli) |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 245 | return tbf; |
| 246 | } |
| 247 | } |
| 248 | return NULL; |
| 249 | } |
| 250 | |
Daniel Willmann | febf1a0 | 2014-07-02 17:58:16 +0200 | [diff] [blame^] | 251 | gprs_rlcmac_tbf *BTS::dl_tbf_by_poll_fn(uint32_t fn, uint8_t trx, uint8_t ts) |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 252 | { |
| 253 | struct gprs_rlcmac_tbf *tbf; |
| 254 | |
| 255 | /* only one TBF can poll on specific TS/FN, because scheduler can only |
| 256 | * schedule one downlink control block (with polling) at a FN per TS */ |
Daniel Willmann | febf1a0 | 2014-07-02 17:58:16 +0200 | [diff] [blame^] | 257 | llist_for_each_entry(tbf, &m_bts.dl_tbfs, list) { |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 258 | if (tbf->state_is_not(GPRS_RLCMAC_RELEASING) |
| 259 | && tbf->poll_state == GPRS_RLCMAC_POLL_SCHED |
Holger Hans Peter Freyther | ec80f82 | 2013-10-27 13:44:37 +0100 | [diff] [blame] | 260 | && tbf->poll_fn == fn && tbf->trx->trx_no == trx |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 261 | && tbf->control_ts == ts) |
| 262 | return tbf; |
| 263 | } |
Daniel Willmann | febf1a0 | 2014-07-02 17:58:16 +0200 | [diff] [blame^] | 264 | return NULL; |
| 265 | } |
| 266 | gprs_rlcmac_tbf *BTS::ul_tbf_by_poll_fn(uint32_t fn, uint8_t trx, uint8_t ts) |
| 267 | { |
| 268 | struct gprs_rlcmac_tbf *tbf; |
| 269 | |
| 270 | /* only one TBF can poll on specific TS/FN, because scheduler can only |
| 271 | * schedule one downlink control block (with polling) at a FN per TS */ |
| 272 | llist_for_each_entry(tbf, &m_bts.ul_tbfs, list) { |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 273 | if (tbf->state_is_not(GPRS_RLCMAC_RELEASING) |
| 274 | && tbf->poll_state == GPRS_RLCMAC_POLL_SCHED |
Holger Hans Peter Freyther | ec80f82 | 2013-10-27 13:44:37 +0100 | [diff] [blame] | 275 | && tbf->poll_fn == fn && tbf->trx->trx_no == trx |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 276 | && tbf->control_ts == ts) |
| 277 | return tbf; |
| 278 | } |
| 279 | return NULL; |
| 280 | } |
| 281 | |
Daniel Willmann | 54044b0 | 2014-07-02 17:58:15 +0200 | [diff] [blame] | 282 | /* lookup downlink TBF Entity (by TFI) */ |
| 283 | gprs_rlcmac_tbf *BTS::dl_tbf_by_tfi(uint8_t tfi, uint8_t trx) |
| 284 | { |
| 285 | return tbf_by_tfi(tfi, trx, GPRS_RLCMAC_DL_TBF); |
| 286 | } |
| 287 | |
| 288 | /* lookup uplink TBF Entity (by TFI) */ |
| 289 | gprs_rlcmac_tbf *BTS::ul_tbf_by_tfi(uint8_t tfi, uint8_t trx) |
| 290 | { |
| 291 | return tbf_by_tfi(tfi, trx, GPRS_RLCMAC_UL_TBF); |
| 292 | } |
| 293 | |
Holger Hans Peter Freyther | f63cabd | 2013-10-26 19:10:43 +0200 | [diff] [blame] | 294 | /* lookup TBF Entity (by TFI) */ |
| 295 | gprs_rlcmac_tbf *BTS::tbf_by_tfi(uint8_t tfi, uint8_t trx, |
| 296 | enum gprs_rlcmac_tbf_direction dir) |
| 297 | { |
| 298 | struct gprs_rlcmac_tbf *tbf; |
| 299 | |
| 300 | if (tfi >= 32 || trx >= 8) |
| 301 | return NULL; |
| 302 | |
| 303 | if (dir == GPRS_RLCMAC_UL_TBF) |
| 304 | tbf = m_bts.trx[trx].ul_tbf[tfi]; |
| 305 | else |
| 306 | tbf = m_bts.trx[trx].dl_tbf[tfi]; |
| 307 | if (!tbf) |
| 308 | return NULL; |
| 309 | |
| 310 | if (tbf->state_is_not(GPRS_RLCMAC_RELEASING)) |
| 311 | return tbf; |
| 312 | |
| 313 | return NULL; |
| 314 | } |
| 315 | |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 316 | /* FIXME: spread resources over multiple TRX. Also add option to use same |
| 317 | * TRX in case of existing TBF for TLLI in the other direction. */ |
| 318 | /* search for free TFI and return TFI, TRX */ |
| 319 | int BTS::tfi_find_free(enum gprs_rlcmac_tbf_direction dir, |
| 320 | uint8_t *_trx, int8_t use_trx) |
| 321 | { |
| 322 | struct gprs_rlcmac_pdch *pdch; |
| 323 | struct gprs_rlcmac_tbf **tbfp; |
| 324 | uint8_t trx_from, trx_to, trx, ts, tfi; |
| 325 | |
| 326 | if (use_trx >= 0 && use_trx < 8) |
| 327 | trx_from = trx_to = use_trx; |
| 328 | else { |
| 329 | trx_from = 0; |
| 330 | trx_to = 7; |
| 331 | } |
| 332 | |
| 333 | /* on TRX find first enabled TS */ |
| 334 | for (trx = trx_from; trx <= trx_to; trx++) { |
| 335 | for (ts = 0; ts < 8; ts++) { |
| 336 | pdch = &m_bts.trx[trx].pdch[ts]; |
| 337 | if (!pdch->is_enabled()) |
| 338 | continue; |
| 339 | break; |
| 340 | } |
| 341 | if (ts < 8) |
| 342 | break; |
| 343 | } |
| 344 | if (trx > trx_to) { |
| 345 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH available.\n"); |
| 346 | return -EINVAL; |
| 347 | } |
| 348 | |
| 349 | |
| 350 | LOGP(DRLCMAC, LOGL_DEBUG, "Searching for first unallocated TFI: " |
| 351 | "TRX=%d first TS=%d\n", trx, ts); |
| 352 | if (dir == GPRS_RLCMAC_UL_TBF) |
| 353 | tbfp = m_bts.trx[trx].ul_tbf; |
| 354 | else |
| 355 | tbfp = m_bts.trx[trx].dl_tbf; |
| 356 | for (tfi = 0; tfi < 32; tfi++) { |
| 357 | if (!tbfp[tfi]) |
| 358 | break; |
| 359 | } |
| 360 | |
| 361 | if (tfi < 32) { |
| 362 | LOGP(DRLCMAC, LOGL_DEBUG, " Found TFI=%d.\n", tfi); |
| 363 | *_trx = trx; |
| 364 | return tfi; |
| 365 | } |
| 366 | LOGP(DRLCMAC, LOGL_NOTICE, "No TFI available.\n"); |
| 367 | |
| 368 | return -1; |
| 369 | } |
| 370 | |
Holger Hans Peter Freyther | 40cfaa6 | 2013-10-26 19:49:16 +0200 | [diff] [blame] | 371 | int BTS::rcv_imm_ass_cnf(const uint8_t *data, uint32_t fn) |
| 372 | { |
| 373 | struct gprs_rlcmac_tbf *tbf; |
| 374 | uint8_t plen; |
| 375 | uint32_t tlli; |
| 376 | |
| 377 | /* move to IA Rest Octets */ |
| 378 | plen = data[0] >> 2; |
| 379 | data += 1 + plen; |
| 380 | |
| 381 | if ((*data & 0xf0) != 0xd0) { |
| 382 | LOGP(DRLCMAC, LOGL_ERROR, "Got IMM.ASS confirm, but rest " |
| 383 | "octets do not start with bit sequence 'HH01' " |
| 384 | "(Packet Downlink Assignment)\n"); |
| 385 | return -EINVAL; |
| 386 | } |
| 387 | |
| 388 | /* get TLLI from downlink assignment */ |
| 389 | tlli = (*data++) << 28; |
| 390 | tlli |= (*data++) << 20; |
| 391 | tlli |= (*data++) << 12; |
| 392 | tlli |= (*data++) << 4; |
| 393 | tlli |= (*data++) >> 4; |
| 394 | |
Daniel Willmann | b59d61b | 2014-07-02 17:58:14 +0200 | [diff] [blame] | 395 | tbf = dl_tbf_by_tlli(tlli); |
Holger Hans Peter Freyther | 40cfaa6 | 2013-10-26 19:49:16 +0200 | [diff] [blame] | 396 | if (!tbf) { |
| 397 | LOGP(DRLCMAC, LOGL_ERROR, "Got IMM.ASS confirm, but TLLI=%08x " |
| 398 | "does not exit\n", tlli); |
| 399 | return -EINVAL; |
| 400 | } |
| 401 | |
| 402 | LOGP(DRLCMAC, LOGL_DEBUG, "Got IMM.ASS confirm for TLLI=%08x\n", tlli); |
| 403 | |
| 404 | if (tbf->dir.dl.wait_confirm) |
| 405 | tbf_timer_start(tbf, 0, Tassign_agch); |
| 406 | |
| 407 | return 0; |
| 408 | } |
| 409 | |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 410 | int BTS::rcv_rach(uint8_t ra, uint32_t Fn, int16_t qta) |
| 411 | { |
| 412 | struct gprs_rlcmac_tbf *tbf; |
Holger Hans Peter Freyther | f37e514 | 2013-12-25 18:56:34 +0100 | [diff] [blame] | 413 | uint8_t trx_no, ts_no = 0; |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 414 | int8_t tfi; /* must be signed */ |
| 415 | uint8_t sb = 0; |
| 416 | uint32_t sb_fn = 0; |
| 417 | int rc; |
| 418 | uint8_t plen; |
| 419 | |
Holger Hans Peter Freyther | c1ae226 | 2013-10-27 10:50:35 +0100 | [diff] [blame] | 420 | rach_frame(); |
| 421 | |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 422 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF on RACH, so we provide " |
| 423 | "one:\n"); |
| 424 | if ((ra & 0xf8) == 0x70) { |
| 425 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests single block " |
| 426 | "allocation\n"); |
| 427 | sb = 1; |
| 428 | } else if (m_bts.force_two_phase) { |
| 429 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests single phase access, " |
| 430 | "but we force two phase access\n"); |
| 431 | sb = 1; |
| 432 | } |
| 433 | if (qta < 0) |
| 434 | qta = 0; |
| 435 | if (qta > 252) |
| 436 | qta = 252; |
| 437 | if (sb) { |
Holger Hans Peter Freyther | f37e514 | 2013-12-25 18:56:34 +0100 | [diff] [blame] | 438 | rc = sba()->alloc(&trx_no, &ts_no, &sb_fn, qta >> 2); |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 439 | if (rc < 0) |
| 440 | return rc; |
| 441 | LOGP(DRLCMAC, LOGL_DEBUG, "RX: [PCU <- BTS] RACH qbit-ta=%d " |
| 442 | "ra=0x%02x, Fn=%d (%d,%d,%d)\n", qta, ra, Fn, |
| 443 | (Fn / (26 * 51)) % 32, Fn % 51, Fn % 26); |
| 444 | LOGP(DRLCMAC, LOGL_INFO, "TX: Immediate Assignment Uplink " |
| 445 | "(AGCH)\n"); |
| 446 | } else { |
| 447 | // Create new TBF |
| 448 | #warning "Copy and pate with other routines.." |
Holger Hans Peter Freyther | f37e514 | 2013-12-25 18:56:34 +0100 | [diff] [blame] | 449 | tfi = tfi_find_free(GPRS_RLCMAC_UL_TBF, &trx_no, -1); |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 450 | if (tfi < 0) { |
Holger Hans Peter Freyther | 90b87ea | 2013-10-27 10:38:31 +0100 | [diff] [blame] | 451 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH resource\n"); |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 452 | /* FIXME: send reject */ |
| 453 | return -EBUSY; |
| 454 | } |
| 455 | /* set class to 0, since we don't know the multislot class yet */ |
Holger Hans Peter Freyther | f37e514 | 2013-12-25 18:56:34 +0100 | [diff] [blame] | 456 | tbf = tbf_alloc(&m_bts, NULL, GPRS_RLCMAC_UL_TBF, tfi, trx_no, 0, 1); |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 457 | if (!tbf) { |
Holger Hans Peter Freyther | 90b87ea | 2013-10-27 10:38:31 +0100 | [diff] [blame] | 458 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH resource\n"); |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 459 | /* FIXME: send reject */ |
| 460 | return -EBUSY; |
| 461 | } |
| 462 | tbf->ta = qta >> 2; |
| 463 | tbf_new_state(tbf, GPRS_RLCMAC_FLOW); |
| 464 | tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_CCCH); |
| 465 | tbf_timer_start(tbf, 3169, m_bts.t3169, 0); |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 466 | LOGP(DRLCMAC, LOGL_DEBUG, "%s [UPLINK] START\n", |
| 467 | tbf_name(tbf)); |
| 468 | LOGP(DRLCMAC, LOGL_DEBUG, "%s RX: [PCU <- BTS] RACH " |
| 469 | "qbit-ta=%d ra=0x%02x, Fn=%d (%d,%d,%d)\n", |
| 470 | tbf_name(tbf), |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 471 | 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] | 472 | LOGP(DRLCMAC, LOGL_INFO, "%s TX: START Immediate " |
| 473 | "Assignment Uplink (AGCH)\n", tbf_name(tbf)); |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 474 | } |
| 475 | bitvec *immediate_assignment = bitvec_alloc(22) /* without plen */; |
| 476 | bitvec_unhex(immediate_assignment, |
| 477 | "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
| 478 | if (sb) |
| 479 | plen = Encoding::write_immediate_assignment(&m_bts, immediate_assignment, 0, ra, |
Holger Hans Peter Freyther | f37e514 | 2013-12-25 18:56:34 +0100 | [diff] [blame] | 480 | Fn, qta >> 2, m_bts.trx[trx_no].arfcn, ts_no, |
| 481 | m_bts.trx[trx_no].pdch[ts_no].tsc, 0, 0, 0, 0, sb_fn, 1, |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 482 | m_bts.alpha, m_bts.gamma, -1); |
| 483 | else |
| 484 | plen = Encoding::write_immediate_assignment(&m_bts, immediate_assignment, 0, ra, |
Holger Hans Peter Freyther | 8f399de | 2013-12-25 20:22:35 +0100 | [diff] [blame] | 485 | 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] | 486 | 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] | 487 | m_bts.alpha, m_bts.gamma, -1); |
| 488 | pcu_l1if_tx_agch(immediate_assignment, plen); |
| 489 | bitvec_free(immediate_assignment); |
| 490 | |
| 491 | return 0; |
| 492 | } |
| 493 | |
Holger Hans Peter Freyther | 24c1a5b | 2013-10-26 20:27:44 +0200 | [diff] [blame] | 494 | /* depending on the current TBF, we assign on PACCH or AGCH */ |
| 495 | void BTS::trigger_dl_ass( |
| 496 | struct gprs_rlcmac_tbf *tbf, |
| 497 | struct gprs_rlcmac_tbf *old_tbf, const char *imsi) |
| 498 | { |
| 499 | /* stop pending timer */ |
| 500 | tbf->stop_timer(); |
| 501 | |
| 502 | /* check for downlink tbf: */ |
| 503 | if (old_tbf) { |
| 504 | LOGP(DRLCMAC, LOGL_DEBUG, "Send dowlink assignment on " |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 505 | "PACCH, because %s exists\n", tbf_name(old_tbf)); |
Holger Hans Peter Freyther | 24c1a5b | 2013-10-26 20:27:44 +0200 | [diff] [blame] | 506 | old_tbf->dl_ass_state = GPRS_RLCMAC_DL_ASS_SEND_ASS; |
| 507 | /* use TA from old TBF */ |
| 508 | tbf->ta = old_tbf->ta; |
Daniel Willmann | 73191a4 | 2014-05-30 17:58:00 +0200 | [diff] [blame] | 509 | tbf->was_releasing = tbf->state_is(GPRS_RLCMAC_WAIT_RELEASE); |
Holger Hans Peter Freyther | 24c1a5b | 2013-10-26 20:27:44 +0200 | [diff] [blame] | 510 | /* change state */ |
| 511 | tbf_new_state(tbf, GPRS_RLCMAC_ASSIGN); |
| 512 | tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_PACCH); |
| 513 | /* start timer */ |
| 514 | tbf_timer_start(tbf, 0, Tassign_pacch); |
| 515 | } else { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 516 | 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] | 517 | if (!imsi || strlen(imsi) < 3) { |
| 518 | LOGP(DRLCMAC, LOGL_ERROR, "No valid IMSI!\n"); |
| 519 | return; |
| 520 | } |
Daniel Willmann | 73191a4 | 2014-05-30 17:58:00 +0200 | [diff] [blame] | 521 | tbf->was_releasing = tbf->state_is(GPRS_RLCMAC_WAIT_RELEASE); |
Holger Hans Peter Freyther | 24c1a5b | 2013-10-26 20:27:44 +0200 | [diff] [blame] | 522 | /* change state */ |
| 523 | tbf_new_state(tbf, GPRS_RLCMAC_ASSIGN); |
| 524 | tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_CCCH); |
Holger Hans Peter Freyther | 5464c9b | 2013-10-27 20:57:35 +0100 | [diff] [blame] | 525 | tbf->assign_imsi(imsi); |
Holger Hans Peter Freyther | 24c1a5b | 2013-10-26 20:27:44 +0200 | [diff] [blame] | 526 | /* send immediate assignment */ |
| 527 | tbf->bts->snd_dl_ass(tbf, 0, imsi); |
| 528 | tbf->dir.dl.wait_confirm = 1; |
| 529 | } |
| 530 | } |
| 531 | |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 532 | void BTS::snd_dl_ass(gprs_rlcmac_tbf *tbf, uint8_t poll, const char *imsi) |
| 533 | { |
| 534 | int plen; |
| 535 | |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 536 | 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] | 537 | bitvec *immediate_assignment = bitvec_alloc(22); /* without plen */ |
| 538 | bitvec_unhex(immediate_assignment, "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
| 539 | /* use request reference that has maximum distance to current time, |
| 540 | * so the assignment will not conflict with possible RACH requests. */ |
| 541 | plen = Encoding::write_immediate_assignment(&m_bts, immediate_assignment, 1, 125, |
| 542 | (tbf->pdch[tbf->first_ts]->last_rts_fn + 21216) % 2715648, tbf->ta, |
Holger Hans Peter Freyther | 8f399de | 2013-12-25 20:22:35 +0100 | [diff] [blame] | 543 | 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] | 544 | tbf->poll_fn, 0, m_bts.alpha, m_bts.gamma, -1); |
| 545 | pcu_l1if_tx_pch(immediate_assignment, plen, imsi); |
| 546 | bitvec_free(immediate_assignment); |
| 547 | } |
| 548 | |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 549 | |
| 550 | /* |
| 551 | * PDCH code below. TODO: move to a separate file |
| 552 | */ |
| 553 | |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 554 | void gprs_rlcmac_pdch::enable() |
| 555 | { |
| 556 | /* TODO: Check if there are still allocated resources.. */ |
| 557 | INIT_LLIST_HEAD(&paging_list); |
| 558 | m_is_enabled = 1; |
| 559 | } |
| 560 | |
| 561 | void gprs_rlcmac_pdch::disable() |
| 562 | { |
| 563 | /* TODO.. kick free_resources once we know the TRX/TS we are on */ |
| 564 | m_is_enabled = 0; |
| 565 | } |
| 566 | |
Holger Hans Peter Freyther | 09ef27a | 2013-10-20 16:37:05 +0200 | [diff] [blame] | 567 | void gprs_rlcmac_pdch::free_resources() |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 568 | { |
| 569 | struct gprs_rlcmac_paging *pag; |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 570 | |
| 571 | /* we are not enabled. there should be no resources */ |
| 572 | if (!is_enabled()) |
| 573 | return; |
| 574 | |
| 575 | /* kick all TBF on slot */ |
| 576 | gprs_rlcmac_tbf::free_all(this); |
| 577 | |
| 578 | /* flush all pending paging messages */ |
Holger Hans Peter Freyther | 24e98d0 | 2013-10-19 18:15:44 +0200 | [diff] [blame] | 579 | while ((pag = dequeue_paging())) |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 580 | talloc_free(pag); |
| 581 | |
Holger Hans Peter Freyther | 09ef27a | 2013-10-20 16:37:05 +0200 | [diff] [blame] | 582 | trx->bts->sba()->free_resources(this); |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 583 | } |
Holger Hans Peter Freyther | 24e98d0 | 2013-10-19 18:15:44 +0200 | [diff] [blame] | 584 | |
| 585 | struct gprs_rlcmac_paging *gprs_rlcmac_pdch::dequeue_paging() |
| 586 | { |
| 587 | struct gprs_rlcmac_paging *pag; |
| 588 | |
| 589 | if (llist_empty(&paging_list)) |
| 590 | return NULL; |
| 591 | pag = llist_entry(paging_list.next, struct gprs_rlcmac_paging, list); |
| 592 | llist_del(&pag->list); |
| 593 | |
| 594 | return pag; |
| 595 | } |
| 596 | |
| 597 | struct msgb *gprs_rlcmac_pdch::packet_paging_request() |
| 598 | { |
| 599 | struct gprs_rlcmac_paging *pag; |
| 600 | struct msgb *msg; |
| 601 | unsigned wp = 0, len; |
| 602 | |
| 603 | /* no paging, no message */ |
| 604 | pag = dequeue_paging(); |
| 605 | if (!pag) |
| 606 | return NULL; |
| 607 | |
| 608 | LOGP(DRLCMAC, LOGL_DEBUG, "Scheduling paging\n"); |
| 609 | |
| 610 | /* alloc message */ |
| 611 | msg = msgb_alloc(23, "pag ctrl block"); |
| 612 | if (!msg) { |
| 613 | talloc_free(pag); |
| 614 | return NULL; |
| 615 | } |
| 616 | bitvec *pag_vec = bitvec_alloc(23); |
| 617 | if (!pag_vec) { |
| 618 | msgb_free(msg); |
| 619 | talloc_free(pag); |
| 620 | return NULL; |
| 621 | } |
Holger Hans Peter Freyther | 63f29d6 | 2013-10-19 19:04:03 +0200 | [diff] [blame] | 622 | wp = Encoding::write_packet_paging_request(pag_vec); |
Holger Hans Peter Freyther | 24e98d0 | 2013-10-19 18:15:44 +0200 | [diff] [blame] | 623 | |
| 624 | /* loop until message is full */ |
| 625 | while (pag) { |
| 626 | /* try to add paging */ |
| 627 | if ((pag->identity_lv[1] & 0x07) == 4) { |
| 628 | /* TMSI */ |
| 629 | LOGP(DRLCMAC, LOGL_DEBUG, "- TMSI=0x%08x\n", |
| 630 | ntohl(*((uint32_t *)(pag->identity_lv + 1)))); |
| 631 | len = 1 + 1 + 1 + 32 + 2 + 1; |
| 632 | if (pag->identity_lv[0] != 5) { |
| 633 | LOGP(DRLCMAC, LOGL_ERROR, "TMSI paging with " |
| 634 | "MI != 5 octets!\n"); |
| 635 | goto continue_next; |
| 636 | } |
| 637 | } else { |
| 638 | /* MI */ |
| 639 | LOGP(DRLCMAC, LOGL_DEBUG, "- MI=%s\n", |
| 640 | osmo_hexdump(pag->identity_lv + 1, |
| 641 | pag->identity_lv[0])); |
| 642 | len = 1 + 1 + 1 + 4 + (pag->identity_lv[0]<<3) + 2 + 1; |
| 643 | if (pag->identity_lv[0] > 8) { |
| 644 | LOGP(DRLCMAC, LOGL_ERROR, "Paging with " |
| 645 | "MI > 8 octets!\n"); |
| 646 | goto continue_next; |
| 647 | } |
| 648 | } |
| 649 | if (wp + len > 184) { |
| 650 | LOGP(DRLCMAC, LOGL_DEBUG, "- Does not fit, so schedule " |
| 651 | "next time\n"); |
| 652 | /* put back paging record, because does not fit */ |
| 653 | llist_add_tail(&pag->list, &paging_list); |
| 654 | break; |
| 655 | } |
Holger Hans Peter Freyther | 63f29d6 | 2013-10-19 19:04:03 +0200 | [diff] [blame] | 656 | 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] | 657 | pag->identity_lv + 1, pag->chan_needed); |
| 658 | |
| 659 | continue_next: |
| 660 | talloc_free(pag); |
| 661 | pag = dequeue_paging(); |
| 662 | } |
| 663 | |
| 664 | bitvec_pack(pag_vec, msgb_put(msg, 23)); |
| 665 | RlcMacDownlink_t * mac_control_block = (RlcMacDownlink_t *)talloc_zero(tall_pcu_ctx, RlcMacDownlink_t); |
| 666 | LOGP(DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ TX : Packet Paging Request +++++++++++++++++++++++++\n"); |
| 667 | decode_gsm_rlcmac_downlink(pag_vec, mac_control_block); |
| 668 | LOGPC(DCSN1, LOGL_NOTICE, "\n"); |
| 669 | LOGP(DRLCMAC, LOGL_DEBUG, "------------------------- TX : Packet Paging Request -------------------------\n"); |
| 670 | bitvec_free(pag_vec); |
| 671 | talloc_free(mac_control_block); |
| 672 | |
| 673 | return msg; |
| 674 | } |
| 675 | |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 676 | void gprs_rlcmac_pdch::add_paging(struct gprs_rlcmac_paging *pag) |
| 677 | { |
| 678 | llist_add(&pag->list, &paging_list); |
| 679 | } |
Holger Hans Peter Freyther | 9ae367f | 2013-10-26 16:42:38 +0200 | [diff] [blame] | 680 | |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 681 | /* receive UL data block |
| 682 | * |
| 683 | * The blocks are defragmented and forwarded as LLC frames, if complete. |
| 684 | */ |
Holger Hans Peter Freyther | 05f8efc | 2013-10-26 18:53:16 +0200 | [diff] [blame] | 685 | 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] | 686 | { |
| 687 | struct gprs_rlcmac_tbf *tbf; |
| 688 | struct rlc_ul_header *rh = (struct rlc_ul_header *)data; |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 689 | |
| 690 | switch (len) { |
| 691 | case 54: |
| 692 | /* omitting spare bits */ |
| 693 | len = 53; |
| 694 | break; |
| 695 | case 40: |
| 696 | /* omitting spare bits */ |
| 697 | len = 39; |
| 698 | break; |
| 699 | case 34: |
| 700 | /* omitting spare bits */ |
| 701 | len = 33; |
| 702 | break; |
| 703 | case 23: |
| 704 | break; |
| 705 | default: |
Holger Hans Peter Freyther | 1587764 | 2013-10-27 09:50:15 +0100 | [diff] [blame] | 706 | bts()->decode_error(); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 707 | LOGP(DRLCMACUL, LOGL_ERROR, "Dropping data block with invalid" |
| 708 | "length: %d)\n", len); |
| 709 | return -EINVAL; |
| 710 | } |
| 711 | |
| 712 | /* find TBF inst from given TFI */ |
Daniel Willmann | 54044b0 | 2014-07-02 17:58:15 +0200 | [diff] [blame] | 713 | tbf = bts()->ul_tbf_by_tfi(rh->tfi, trx_no()); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 714 | if (!tbf) { |
Holger Hans Peter Freyther | 15bb1a2 | 2013-10-27 12:30:46 +0100 | [diff] [blame] | 715 | LOGP(DRLCMACUL, LOGL_NOTICE, "UL DATA unknown TFI=%d\n", |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 716 | rh->tfi); |
| 717 | return 0; |
| 718 | } |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 719 | |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 720 | return tbf->rcv_data_block_acknowledged(data, len, rssi); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 721 | } |
| 722 | |
Holger Hans Peter Freyther | e1a075a | 2013-10-27 13:35:30 +0100 | [diff] [blame] | 723 | 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] | 724 | { |
| 725 | struct gprs_rlcmac_tbf *tbf; |
| 726 | uint32_t tlli = 0; |
| 727 | |
Holger Hans Peter Freyther | e1a075a | 2013-10-27 13:35:30 +0100 | [diff] [blame] | 728 | tlli = packet->TLLI; |
Daniel Willmann | febf1a0 | 2014-07-02 17:58:16 +0200 | [diff] [blame^] | 729 | tbf = bts()->ul_tbf_by_poll_fn(fn, trx_no(), ts_no); |
| 730 | if (!tbf) |
| 731 | tbf = bts()->dl_tbf_by_poll_fn(fn, trx_no(), ts_no); |
| 732 | |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 733 | if (!tbf) { |
| 734 | LOGP(DRLCMAC, LOGL_NOTICE, "PACKET CONTROL ACK with " |
Holger Hans Peter Freyther | 15bb1a2 | 2013-10-27 12:30:46 +0100 | [diff] [blame] | 735 | "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] | 736 | fn, tlli, trx_no(), ts_no); |
| 737 | return; |
| 738 | } |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 739 | tbf->update_tlli(tlli); |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 740 | 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] | 741 | tbf->poll_state = GPRS_RLCMAC_POLL_NONE; |
| 742 | |
| 743 | /* check if this control ack belongs to packet uplink ack */ |
| 744 | 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] | 745 | 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] | 746 | tbf->ul_ack_state = GPRS_RLCMAC_UL_ACK_NONE; |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 747 | if ((tbf->state_flags & |
| 748 | (1 << GPRS_RLCMAC_FLAG_TO_UL_ACK))) { |
| 749 | tbf->state_flags &= |
| 750 | ~(1 << GPRS_RLCMAC_FLAG_TO_UL_ACK); |
| 751 | LOGP(DRLCMAC, LOGL_NOTICE, "Recovered uplink " |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 752 | "ack for UL %s\n", tbf_name(tbf)); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 753 | } |
| 754 | tbf_free(tbf); |
| 755 | return; |
| 756 | } |
| 757 | 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] | 758 | 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] | 759 | /* reset N3105 */ |
| 760 | tbf->n3105 = 0; |
| 761 | tbf->dl_ass_state = GPRS_RLCMAC_DL_ASS_NONE; |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 762 | if (tbf->direction == GPRS_RLCMAC_UL_TBF) |
Daniel Willmann | b59d61b | 2014-07-02 17:58:14 +0200 | [diff] [blame] | 763 | tbf = bts()->dl_tbf_by_tlli(tbf->tlli()); |
Holger Hans Peter Freyther | 875fc89 | 2013-10-27 13:35:46 +0100 | [diff] [blame] | 764 | #warning "TBF is changing on the way... *sigh*" |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 765 | if (!tbf) { |
| 766 | LOGP(DRLCMAC, LOGL_ERROR, "Got ACK, but DL " |
Holger Hans Peter Freyther | 875fc89 | 2013-10-27 13:35:46 +0100 | [diff] [blame] | 767 | "TBF is gone TLLI=0x%08x\n", tlli); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 768 | return; |
| 769 | } |
| 770 | tbf_new_state(tbf, GPRS_RLCMAC_FLOW); |
| 771 | /* stop pending assignment timer */ |
| 772 | tbf->stop_timer(); |
| 773 | if ((tbf->state_flags & |
| 774 | (1 << GPRS_RLCMAC_FLAG_TO_DL_ASS))) { |
| 775 | tbf->state_flags &= |
| 776 | ~(1 << GPRS_RLCMAC_FLAG_TO_DL_ASS); |
| 777 | LOGP(DRLCMAC, LOGL_NOTICE, "Recovered downlink " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 778 | "assignment for %s\n", tbf_name(tbf)); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 779 | } |
| 780 | tbf_assign_control_ts(tbf); |
| 781 | return; |
| 782 | } |
| 783 | 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] | 784 | 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] | 785 | /* reset N3105 */ |
| 786 | tbf->n3105 = 0; |
| 787 | tbf->ul_ass_state = GPRS_RLCMAC_UL_ASS_NONE; |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 788 | #warning "TBF is changing on the way... *sigh*" |
| 789 | if (tbf->direction == GPRS_RLCMAC_DL_TBF) |
Daniel Willmann | b59d61b | 2014-07-02 17:58:14 +0200 | [diff] [blame] | 790 | tbf = bts()->ul_tbf_by_tlli(tbf->tlli()); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 791 | if (!tbf) { |
| 792 | LOGP(DRLCMAC, LOGL_ERROR, "Got ACK, but UL " |
Holger Hans Peter Freyther | 8d0e489 | 2013-10-27 12:42:58 +0100 | [diff] [blame] | 793 | "TBF is gone TLLI=0x%08x\n", tlli); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 794 | return; |
| 795 | } |
| 796 | tbf_new_state(tbf, GPRS_RLCMAC_FLOW); |
| 797 | if ((tbf->state_flags & |
| 798 | (1 << GPRS_RLCMAC_FLAG_TO_UL_ASS))) { |
| 799 | tbf->state_flags &= |
| 800 | ~(1 << GPRS_RLCMAC_FLAG_TO_UL_ASS); |
| 801 | LOGP(DRLCMAC, LOGL_NOTICE, "Recovered uplink " |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 802 | "assignment for UL %s\n", tbf_name(tbf)); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 803 | } |
| 804 | tbf_assign_control_ts(tbf); |
| 805 | return; |
| 806 | } |
| 807 | LOGP(DRLCMAC, LOGL_ERROR, "Error: received PACET CONTROL ACK " |
| 808 | "at no request\n"); |
| 809 | } |
| 810 | |
Holger Hans Peter Freyther | 5da2014 | 2013-10-27 11:41:01 +0100 | [diff] [blame] | 811 | 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] | 812 | { |
| 813 | int8_t tfi = 0; /* must be signed */ |
| 814 | struct gprs_rlcmac_tbf *tbf; |
| 815 | int rc; |
| 816 | |
Holger Hans Peter Freyther | 5da2014 | 2013-10-27 11:41:01 +0100 | [diff] [blame] | 817 | tfi = ack_nack->DOWNLINK_TFI; |
Daniel Willmann | febf1a0 | 2014-07-02 17:58:16 +0200 | [diff] [blame^] | 818 | tbf = bts()->dl_tbf_by_poll_fn(fn, trx_no(), ts_no); |
Holger Hans Peter Freyther | 5a96581 | 2013-10-27 11:07:17 +0100 | [diff] [blame] | 819 | if (!tbf) { |
| 820 | LOGP(DRLCMAC, LOGL_NOTICE, "PACKET DOWNLINK ACK with " |
| 821 | "unknown FN=%u TFI=%d (TRX %d TS %d)\n", |
| 822 | fn, tfi, trx_no(), ts_no); |
| 823 | return; |
| 824 | } |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 825 | if (tbf->tfi() != tfi) { |
Holger Hans Peter Freyther | 5a96581 | 2013-10-27 11:07:17 +0100 | [diff] [blame] | 826 | LOGP(DRLCMAC, LOGL_NOTICE, "PACKET DOWNLINK ACK with " |
| 827 | "wrong TFI=%d, ignoring!\n", tfi); |
| 828 | return; |
| 829 | } |
| 830 | tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_DL_ACK); |
| 831 | if ((tbf->state_flags & (1 << GPRS_RLCMAC_FLAG_TO_DL_ACK))) { |
| 832 | tbf->state_flags &= ~(1 << GPRS_RLCMAC_FLAG_TO_DL_ACK); |
| 833 | LOGP(DRLCMAC, LOGL_NOTICE, "Recovered downlink ack " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 834 | "for %s\n", tbf_name(tbf)); |
Holger Hans Peter Freyther | 5a96581 | 2013-10-27 11:07:17 +0100 | [diff] [blame] | 835 | } |
| 836 | /* reset N3105 */ |
| 837 | tbf->n3105 = 0; |
| 838 | tbf->stop_t3191(); |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 839 | 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] | 840 | tbf->poll_state = GPRS_RLCMAC_POLL_NONE; |
Holger Hans Peter Freyther | 5a96581 | 2013-10-27 11:07:17 +0100 | [diff] [blame] | 841 | |
Daniel Willmann | fc03bbe | 2014-05-30 17:57:59 +0200 | [diff] [blame] | 842 | rc = tbf->rcvd_dl_ack( |
Holger Hans Peter Freyther | 5da2014 | 2013-10-27 11:41:01 +0100 | [diff] [blame] | 843 | ack_nack->Ack_Nack_Description.FINAL_ACK_INDICATION, |
| 844 | ack_nack->Ack_Nack_Description.STARTING_SEQUENCE_NUMBER, |
| 845 | ack_nack->Ack_Nack_Description.RECEIVED_BLOCK_BITMAP); |
Holger Hans Peter Freyther | 5a96581 | 2013-10-27 11:07:17 +0100 | [diff] [blame] | 846 | if (rc == 1) { |
| 847 | tbf_free(tbf); |
| 848 | return; |
| 849 | } |
| 850 | /* check for channel request */ |
Holger Hans Peter Freyther | 5da2014 | 2013-10-27 11:41:01 +0100 | [diff] [blame] | 851 | if (ack_nack->Exist_Channel_Request_Description) { |
Holger Hans Peter Freyther | 5a96581 | 2013-10-27 11:07:17 +0100 | [diff] [blame] | 852 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF in ack " |
| 853 | "message, so we provide one:\n"); |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 854 | 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] | 855 | /* schedule uplink assignment */ |
| 856 | tbf->ul_ass_state = GPRS_RLCMAC_UL_ASS_SEND_ASS; |
| 857 | } |
| 858 | } |
| 859 | |
Holger Hans Peter Freyther | 7a34471 | 2013-10-27 11:37:53 +0100 | [diff] [blame] | 860 | 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] | 861 | { |
Holger Hans Peter Freyther | fcbc702 | 2013-10-26 17:38:37 +0200 | [diff] [blame] | 862 | struct gprs_rlcmac_tbf *tbf; |
| 863 | struct gprs_rlcmac_sba *sba; |
| 864 | int rc; |
| 865 | |
Holger Hans Peter Freyther | 7a34471 | 2013-10-27 11:37:53 +0100 | [diff] [blame] | 866 | if (request->ID.UnionType) { |
Holger Hans Peter Freyther | 8021644 | 2013-10-27 15:42:25 +0100 | [diff] [blame] | 867 | uint32_t tlli = request->ID.u.TLLI; |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 868 | uint8_t ms_class = 0; |
| 869 | struct gprs_rlcmac_tbf *dl_tbf; |
| 870 | uint8_t ta; |
| 871 | |
Daniel Willmann | b59d61b | 2014-07-02 17:58:14 +0200 | [diff] [blame] | 872 | tbf = bts()->ul_tbf_by_tlli(tlli); |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 873 | if (tbf) { |
| 874 | LOGP(DRLCMACUL, LOGL_NOTICE, "Got RACH from " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 875 | "TLLI=0x%08x while %s still " |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 876 | "exists. Killing pending DL TBF\n", |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 877 | tlli, tbf_name(tbf)); |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 878 | tbf_free(tbf); |
| 879 | tbf = NULL; |
| 880 | } |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 881 | |
Daniel Willmann | b59d61b | 2014-07-02 17:58:14 +0200 | [diff] [blame] | 882 | if ((dl_tbf = bts()->dl_tbf_by_tlli(tlli))) { |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 883 | LOGP(DRLCMACUL, LOGL_NOTICE, "Got RACH from " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 884 | "TLLI=0x%08x while %s still exists. " |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 885 | "Killing pending DL TBF\n", tlli, |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 886 | tbf_name(dl_tbf)); |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 887 | tbf_free(dl_tbf); |
Holger Hans Peter Freyther | 3d0cc2f | 2014-01-16 10:09:42 +0100 | [diff] [blame] | 888 | dl_tbf = NULL; |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 889 | } |
| 890 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF " |
| 891 | "in packet resource request of single " |
| 892 | "block, so we provide one:\n"); |
| 893 | sba = bts()->sba()->find(this, fn); |
| 894 | if (!sba) { |
| 895 | LOGP(DRLCMAC, LOGL_NOTICE, "MS requests UL TBF " |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 896 | "in packet resource request of single " |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 897 | "block, but there is no resource request " |
| 898 | "scheduled!\n"); |
| 899 | rc = bts()->timing_advance()->recall(tlli); |
| 900 | if (rc >= 0) |
| 901 | ta = rc; |
| 902 | else |
| 903 | ta = 0; |
| 904 | } else { |
| 905 | ta = sba->ta; |
| 906 | bts()->timing_advance()->remember(tlli, ta); |
| 907 | bts()->sba()->free_sba(sba); |
| 908 | } |
| 909 | if (request->Exist_MS_Radio_Access_capability) |
| 910 | ms_class = Decoding::get_ms_class_by_capability(&request->MS_Radio_Access_capability); |
| 911 | if (!ms_class) |
| 912 | LOGP(DRLCMAC, LOGL_NOTICE, "MS does not give us a class.\n"); |
| 913 | tbf = tbf_alloc_ul(bts_data(), trx_no(), ms_class, tlli, ta, NULL); |
| 914 | if (!tbf) |
| 915 | return; |
| 916 | /* set control ts to current MS's TS, until assignment complete */ |
| 917 | LOGP(DRLCMAC, LOGL_DEBUG, "Change control TS to %d until assinment is complete.\n", ts_no); |
| 918 | tbf->control_ts = ts_no; |
| 919 | /* schedule uplink assignment */ |
| 920 | tbf->ul_ass_state = GPRS_RLCMAC_UL_ASS_SEND_ASS; |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 921 | return; |
| 922 | } |
| 923 | |
| 924 | if (request->ID.u.Global_TFI.UnionType) { |
| 925 | int8_t tfi = request->ID.u.Global_TFI.u.DOWNLINK_TFI; |
Daniel Willmann | 54044b0 | 2014-07-02 17:58:15 +0200 | [diff] [blame] | 926 | tbf = bts()->dl_tbf_by_tfi(tfi, trx_no()); |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 927 | if (!tbf) { |
| 928 | 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] | 929 | return; |
| 930 | } |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 931 | } else { |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 932 | int8_t tfi = request->ID.u.Global_TFI.u.UPLINK_TFI; |
Daniel Willmann | 54044b0 | 2014-07-02 17:58:15 +0200 | [diff] [blame] | 933 | tbf = bts()->ul_tbf_by_tfi(tfi, trx_no()); |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 934 | if (!tbf) { |
| 935 | LOGP(DRLCMAC, LOGL_NOTICE, "PACKET RESSOURCE REQ unknown uplink TFI=%d\n", tfi); |
| 936 | return; |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 937 | } |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 938 | } |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 939 | |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 940 | 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] | 941 | } |
| 942 | |
Holger Hans Peter Freyther | cb5c49b | 2013-10-27 11:19:13 +0100 | [diff] [blame] | 943 | 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] | 944 | { |
| 945 | struct gprs_rlcmac_sba *sba; |
| 946 | |
| 947 | sba = bts()->sba()->find(this, fn); |
| 948 | if (!sba) { |
| 949 | LOGP(DRLCMAC, LOGL_NOTICE, "MS send measurement " |
| 950 | "in packet resource request of single " |
| 951 | "block, but there is no resource request " |
Holger Hans Peter Freyther | 53a336f | 2013-10-27 12:47:48 +0100 | [diff] [blame] | 952 | "scheduled! TLLI=0x%08x\n", report->TLLI); |
Holger Hans Peter Freyther | 750ca67 | 2013-10-27 11:16:20 +0100 | [diff] [blame] | 953 | } else { |
Holger Hans Peter Freyther | cb5c49b | 2013-10-27 11:19:13 +0100 | [diff] [blame] | 954 | bts()->timing_advance()->remember(report->TLLI, sba->ta); |
Holger Hans Peter Freyther | 750ca67 | 2013-10-27 11:16:20 +0100 | [diff] [blame] | 955 | bts()->sba()->free_sba(sba); |
| 956 | } |
Holger Hans Peter Freyther | cb5c49b | 2013-10-27 11:19:13 +0100 | [diff] [blame] | 957 | gprs_rlcmac_meas_rep(report); |
Holger Hans Peter Freyther | 750ca67 | 2013-10-27 11:16:20 +0100 | [diff] [blame] | 958 | } |
| 959 | |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 960 | /* Received Uplink RLC control block. */ |
| 961 | int gprs_rlcmac_pdch::rcv_control_block( |
| 962 | bitvec *rlc_block, uint32_t fn) |
| 963 | { |
Holger Hans Peter Freyther | fcbc702 | 2013-10-26 17:38:37 +0200 | [diff] [blame] | 964 | RlcMacUplink_t * ul_control_block = (RlcMacUplink_t *)talloc_zero(tall_pcu_ctx, RlcMacUplink_t); |
| 965 | LOGP(DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ RX : Uplink Control Block +++++++++++++++++++++++++\n"); |
| 966 | decode_gsm_rlcmac_uplink(rlc_block, ul_control_block); |
| 967 | LOGPC(DCSN1, LOGL_NOTICE, "\n"); |
| 968 | LOGP(DRLCMAC, LOGL_DEBUG, "------------------------- RX : Uplink Control Block -------------------------\n"); |
| 969 | switch (ul_control_block->u.MESSAGE_TYPE) { |
| 970 | case MT_PACKET_CONTROL_ACK: |
Holger Hans Peter Freyther | e1a075a | 2013-10-27 13:35:30 +0100 | [diff] [blame] | 971 | 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] | 972 | break; |
| 973 | case MT_PACKET_DOWNLINK_ACK_NACK: |
Holger Hans Peter Freyther | 5da2014 | 2013-10-27 11:41:01 +0100 | [diff] [blame] | 974 | 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] | 975 | break; |
| 976 | case MT_PACKET_RESOURCE_REQUEST: |
Holger Hans Peter Freyther | 7a34471 | 2013-10-27 11:37:53 +0100 | [diff] [blame] | 977 | 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] | 978 | break; |
| 979 | case MT_PACKET_MEASUREMENT_REPORT: |
Holger Hans Peter Freyther | cb5c49b | 2013-10-27 11:19:13 +0100 | [diff] [blame] | 980 | 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] | 981 | break; |
Holger Hans Peter Freyther | c1ae226 | 2013-10-27 10:50:35 +0100 | [diff] [blame] | 982 | case MT_PACKET_UPLINK_DUMMY_CONTROL_BLOCK: |
| 983 | /* ignoring it. change the SI to not force sending these? */ |
| 984 | break; |
Holger Hans Peter Freyther | fcbc702 | 2013-10-26 17:38:37 +0200 | [diff] [blame] | 985 | default: |
Holger Hans Peter Freyther | 1587764 | 2013-10-27 09:50:15 +0100 | [diff] [blame] | 986 | bts()->decode_error(); |
Holger Hans Peter Freyther | 180def9 | 2013-10-27 10:36:37 +0100 | [diff] [blame] | 987 | LOGP(DRLCMAC, LOGL_NOTICE, |
| 988 | "RX: [PCU <- BTS] unknown control block(%d) received\n", |
| 989 | ul_control_block->u.MESSAGE_TYPE); |
Holger Hans Peter Freyther | fcbc702 | 2013-10-26 17:38:37 +0200 | [diff] [blame] | 990 | } |
| 991 | talloc_free(ul_control_block); |
| 992 | return 1; |
| 993 | } |
| 994 | |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 995 | |
Holger Hans Peter Freyther | 6f9f434 | 2013-10-26 16:54:10 +0200 | [diff] [blame] | 996 | /* received RLC/MAC block from L1 */ |
Holger Hans Peter Freyther | 9ae367f | 2013-10-26 16:42:38 +0200 | [diff] [blame] | 997 | int gprs_rlcmac_pdch::rcv_block(uint8_t *data, uint8_t len, uint32_t fn, int8_t rssi) |
| 998 | { |
Holger Hans Peter Freyther | 6f9f434 | 2013-10-26 16:54:10 +0200 | [diff] [blame] | 999 | unsigned payload = data[0] >> 6; |
Holger Hans Peter Freyther | 6f9f434 | 2013-10-26 16:54:10 +0200 | [diff] [blame] | 1000 | bitvec *block; |
| 1001 | int rc = 0; |
| 1002 | |
| 1003 | switch (payload) { |
| 1004 | case GPRS_RLCMAC_DATA_BLOCK: |
Holger Hans Peter Freyther | 05f8efc | 2013-10-26 18:53:16 +0200 | [diff] [blame] | 1005 | rc = rcv_data_block_acknowledged(data, len, rssi); |
Holger Hans Peter Freyther | 6f9f434 | 2013-10-26 16:54:10 +0200 | [diff] [blame] | 1006 | break; |
| 1007 | case GPRS_RLCMAC_CONTROL_BLOCK: |
| 1008 | block = bitvec_alloc(len); |
| 1009 | if (!block) |
| 1010 | return -ENOMEM; |
| 1011 | bitvec_unpack(block, data); |
Holger Hans Peter Freyther | 05f8efc | 2013-10-26 18:53:16 +0200 | [diff] [blame] | 1012 | rc = rcv_control_block(block, fn); |
Holger Hans Peter Freyther | 6f9f434 | 2013-10-26 16:54:10 +0200 | [diff] [blame] | 1013 | bitvec_free(block); |
| 1014 | break; |
| 1015 | case GPRS_RLCMAC_CONTROL_BLOCK_OPT: |
| 1016 | LOGP(DRLCMAC, LOGL_NOTICE, "GPRS_RLCMAC_CONTROL_BLOCK_OPT block payload is not supported.\n"); |
| 1017 | break; |
| 1018 | default: |
| 1019 | LOGP(DRLCMAC, LOGL_NOTICE, "Unknown RLCMAC block payload(%u).\n", payload); |
| 1020 | rc = -EINVAL; |
| 1021 | } |
| 1022 | |
| 1023 | return rc; |
Holger Hans Peter Freyther | 9ae367f | 2013-10-26 16:42:38 +0200 | [diff] [blame] | 1024 | } |
Daniel Willmann | 1e0c610 | 2014-06-04 14:56:09 +0200 | [diff] [blame] | 1025 | |
Daniel Willmann | 17a1d5e | 2014-05-30 20:21:30 +0200 | [diff] [blame] | 1026 | gprs_rlcmac_tbf *gprs_rlcmac_pdch::tbf_from_list_by_tfi(struct llist_head *tbf_list, uint8_t tfi) |
Daniel Willmann | 1e0c610 | 2014-06-04 14:56:09 +0200 | [diff] [blame] | 1027 | { |
Daniel Willmann | 17a1d5e | 2014-05-30 20:21:30 +0200 | [diff] [blame] | 1028 | gprs_rlcmac_tbf *tbf; |
| 1029 | |
| 1030 | llist_for_each_entry(tbf, tbf_list, list) { |
| 1031 | if (tbf->tfi() != tfi) |
| 1032 | continue; |
| 1033 | if (!tbf->pdch[ts_no]) |
| 1034 | continue; |
| 1035 | return tbf; |
| 1036 | } |
| 1037 | return NULL; |
Daniel Willmann | 1e0c610 | 2014-06-04 14:56:09 +0200 | [diff] [blame] | 1038 | } |
| 1039 | |
Daniel Willmann | 17a1d5e | 2014-05-30 20:21:30 +0200 | [diff] [blame] | 1040 | gprs_rlcmac_tbf *gprs_rlcmac_pdch::ul_tbf_by_tfi(uint8_t tfi) |
Daniel Willmann | 1e0c610 | 2014-06-04 14:56:09 +0200 | [diff] [blame] | 1041 | { |
Daniel Willmann | 17a1d5e | 2014-05-30 20:21:30 +0200 | [diff] [blame] | 1042 | return tbf_from_list_by_tfi(&bts_data()->ul_tbfs, tfi); |
| 1043 | } |
| 1044 | |
| 1045 | gprs_rlcmac_tbf *gprs_rlcmac_pdch::dl_tbf_by_tfi(uint8_t tfi) |
| 1046 | { |
| 1047 | return tbf_from_list_by_tfi(&bts_data()->dl_tbfs, tfi); |
Daniel Willmann | 1e0c610 | 2014-06-04 14:56:09 +0200 | [diff] [blame] | 1048 | } |