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 "}, |
Jacob Erlbeck | 5979fe9 | 2015-07-14 14:02:41 +0200 | [diff] [blame] | 57 | { "tbf.alloc.algo-a", "TBF Alloc Algo A "}, |
| 58 | { "tbf.alloc.algo-b", "TBF Alloc Algo B "}, |
Holger Hans Peter Freyther | e9429b5 | 2013-11-13 19:36:57 +0100 | [diff] [blame] | 59 | { "rlc.sent", "RLC Sent "}, |
| 60 | { "rlc.resent", "RLC Resent "}, |
Holger Hans Peter Freyther | ef93bdb | 2013-11-24 00:01:50 +0100 | [diff] [blame] | 61 | { "rlc.restarted", "RLC Restarted "}, |
Holger Hans Peter Freyther | c70aae4 | 2013-11-19 17:09:37 +0100 | [diff] [blame] | 62 | { "rlc.stalled", "RLC Stalled "}, |
Holger Hans Peter Freyther | 092478f | 2013-11-23 01:01:19 +0100 | [diff] [blame] | 63 | { "rlc.nacked", "RLC Nacked "}, |
Jacob Erlbeck | c91c18e | 2015-07-07 09:33:29 +0200 | [diff] [blame] | 64 | { "rlc.ass.timedout", "RLC Assign Timeout "}, |
| 65 | { "rlc.ack.timedout", "RLC Ack Timeout "}, |
| 66 | { "rlc.rel.timedout", "RLC Release Timeout "}, |
Jacob Erlbeck | be4a08b | 2015-08-25 15:19:31 +0200 | [diff] [blame] | 67 | { "rlc.late-block", "RLC Late Block "}, |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 68 | { "decode.errors", "Decode Errors "}, |
Holger Hans Peter Freyther | 93e048f | 2013-10-27 10:00:47 +0100 | [diff] [blame] | 69 | { "sba.allocated", "SBA Allocated "}, |
| 70 | { "sba.freed", "SBA Freed "}, |
| 71 | { "sba.timedout", "SBA Timeout "}, |
Holger Hans Peter Freyther | 1997787 | 2013-10-27 10:34:31 +0100 | [diff] [blame] | 72 | { "llc.timeout", "Timedout Frames "}, |
| 73 | { "llc.dropped", "Dropped Frames "}, |
Holger Hans Peter Freyther | b3d5ee2 | 2013-11-13 16:43:26 +0100 | [diff] [blame] | 74 | { "llc.scheduled", "Scheduled Frames "}, |
Holger Hans Peter Freyther | c1ae226 | 2013-10-27 10:50:35 +0100 | [diff] [blame] | 75 | { "rach.requests", "RACH requests "}, |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 76 | }; |
| 77 | |
| 78 | static const struct rate_ctr_group_desc bts_ctrg_desc = { |
| 79 | "bts", |
| 80 | "BTS Statistics", |
| 81 | ARRAY_SIZE(bts_ctr_description), |
| 82 | bts_ctr_description, |
| 83 | }; |
| 84 | |
Holger Hans Peter Freyther | b6acfda | 2013-10-17 19:41:11 +0200 | [diff] [blame] | 85 | BTS* BTS::main_bts() |
| 86 | { |
| 87 | return &s_bts; |
| 88 | } |
| 89 | |
| 90 | struct gprs_rlcmac_bts *BTS::bts_data() |
| 91 | { |
| 92 | return &m_bts; |
| 93 | } |
| 94 | |
| 95 | struct gprs_rlcmac_bts *bts_main_data() |
| 96 | { |
| 97 | return BTS::main_bts()->bts_data(); |
| 98 | } |
| 99 | |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 100 | struct rate_ctr_group *bts_main_data_stats() |
| 101 | { |
| 102 | return BTS::main_bts()->rate_counters(); |
| 103 | } |
| 104 | |
Holger Hans Peter Freyther | b6acfda | 2013-10-17 19:41:11 +0200 | [diff] [blame] | 105 | BTS::BTS() |
Holger Hans Peter Freyther | 9b30c7f | 2013-10-17 19:59:56 +0200 | [diff] [blame] | 106 | : m_cur_fn(0) |
Jacob Erlbeck | 60f7703 | 2015-08-24 14:35:14 +0200 | [diff] [blame] | 107 | , m_cur_blk_fn(-1) |
Holger Hans Peter Freyther | b78adcd | 2013-10-17 20:12:37 +0200 | [diff] [blame] | 108 | , m_pollController(*this) |
Holger Hans Peter Freyther | cedf890 | 2013-10-19 20:47:12 +0200 | [diff] [blame] | 109 | , m_sba(*this) |
Jacob Erlbeck | 17214bb | 2015-06-02 14:06:12 +0200 | [diff] [blame] | 110 | , m_ms_store(this) |
Holger Hans Peter Freyther | b6acfda | 2013-10-17 19:41:11 +0200 | [diff] [blame] | 111 | { |
| 112 | memset(&m_bts, 0, sizeof(m_bts)); |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 113 | INIT_LLIST_HEAD(&m_bts.ul_tbfs); |
| 114 | INIT_LLIST_HEAD(&m_bts.dl_tbfs); |
Holger Hans Peter Freyther | b6acfda | 2013-10-17 19:41:11 +0200 | [diff] [blame] | 115 | m_bts.bts = this; |
Holger Hans Peter Freyther | 4ed1dae | 2013-10-20 10:14:03 +0200 | [diff] [blame] | 116 | |
| 117 | /* initialize back pointers */ |
| 118 | for (size_t trx_no = 0; trx_no < ARRAY_SIZE(m_bts.trx); ++trx_no) { |
| 119 | struct gprs_rlcmac_trx *trx = &m_bts.trx[trx_no]; |
| 120 | trx->trx_no = trx_no; |
| 121 | trx->bts = this; |
| 122 | |
| 123 | for (size_t ts_no = 0; ts_no < ARRAY_SIZE(trx->pdch); ++ts_no) { |
| 124 | struct gprs_rlcmac_pdch *pdch = &trx->pdch[ts_no]; |
| 125 | pdch->ts_no = ts_no; |
| 126 | pdch->trx = trx; |
| 127 | } |
| 128 | } |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 129 | |
| 130 | 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] | 131 | } |
Holger Hans Peter Freyther | 9b30c7f | 2013-10-17 19:59:56 +0200 | [diff] [blame] | 132 | |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 133 | BTS::~BTS() |
| 134 | { |
| 135 | rate_ctr_group_free(m_ratectrs); |
| 136 | } |
| 137 | |
| 138 | |
Holger Hans Peter Freyther | 9b30c7f | 2013-10-17 19:59:56 +0200 | [diff] [blame] | 139 | void BTS::set_current_frame_number(int fn) |
| 140 | { |
Jacob Erlbeck | ac49d09 | 2015-08-27 13:18:24 +0200 | [diff] [blame] | 141 | /* The UL frame numbers lag 3 behind the DL frames and the data |
| 142 | * indication is only sent after all 4 frames of the block have been |
| 143 | * received. Sometimes there is an idle frame between the end of one |
| 144 | * and start of another frame (every 3 blocks). So the timeout should |
| 145 | * definitely be there if we're more than 8 frames past poll_fn. Let's |
Jacob Erlbeck | e77d49f | 2015-08-27 13:28:05 +0200 | [diff] [blame] | 146 | * stay on the safe side and say 13 or more. An additional delay can |
| 147 | * happen due to the block processing time in the DSP, so the delay of |
| 148 | * decoded blocks relative to the timing clock can be much larger. |
| 149 | * Values up to 50 frames have been observed under load. */ |
| 150 | const static int max_delay = 60; |
Jacob Erlbeck | ac49d09 | 2015-08-27 13:18:24 +0200 | [diff] [blame] | 151 | |
Holger Hans Peter Freyther | 9b30c7f | 2013-10-17 19:59:56 +0200 | [diff] [blame] | 152 | m_cur_fn = fn; |
Jacob Erlbeck | ac49d09 | 2015-08-27 13:18:24 +0200 | [diff] [blame] | 153 | m_pollController.expireTimedout(m_cur_fn, max_delay); |
Holger Hans Peter Freyther | 9b30c7f | 2013-10-17 19:59:56 +0200 | [diff] [blame] | 154 | } |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 155 | |
Jacob Erlbeck | af75ce8 | 2015-08-26 13:22:28 +0200 | [diff] [blame^] | 156 | void BTS::set_current_block_frame_number(int fn, unsigned max_delay) |
Jacob Erlbeck | 60f7703 | 2015-08-24 14:35:14 +0200 | [diff] [blame] | 157 | { |
| 158 | int delay = 0; |
| 159 | const int late_block_delay_thresh = 13; |
| 160 | const int fn_update_ok_min_delay = -500; |
| 161 | const int fn_update_ok_max_delay = 0; |
| 162 | |
| 163 | /* frame numbers in the received blocks are assumed to be strongly |
| 164 | * monotonic. */ |
| 165 | if (m_cur_blk_fn >= 0) { |
| 166 | int delta = (fn + 2715648 * 3 / 2 - m_cur_blk_fn) % 2715648 - 2715648/2; |
| 167 | if (delta <= 0) |
| 168 | return; |
| 169 | } |
| 170 | |
| 171 | /* Check block delay vs. the current frame number */ |
| 172 | if (current_frame_number() != 0) |
| 173 | delay = (fn + 2715648 * 3 / 2 - current_frame_number()) % 2715648 |
| 174 | - 2715648/2; |
Jacob Erlbeck | be4a08b | 2015-08-25 15:19:31 +0200 | [diff] [blame] | 175 | if (delay <= -late_block_delay_thresh) { |
Jacob Erlbeck | 60f7703 | 2015-08-24 14:35:14 +0200 | [diff] [blame] | 176 | LOGP(DRLCMAC, LOGL_NOTICE, |
| 177 | "Late RLC block, FN delta: %d FN: %d curFN: %d\n", |
| 178 | delay, fn, current_frame_number()); |
Jacob Erlbeck | be4a08b | 2015-08-25 15:19:31 +0200 | [diff] [blame] | 179 | rlc_late_block(); |
| 180 | } |
Jacob Erlbeck | 60f7703 | 2015-08-24 14:35:14 +0200 | [diff] [blame] | 181 | |
| 182 | m_cur_blk_fn = fn; |
| 183 | if (delay < fn_update_ok_min_delay || delay > fn_update_ok_max_delay || |
| 184 | current_frame_number() == 0) |
| 185 | m_cur_fn = fn; |
| 186 | |
Jacob Erlbeck | af75ce8 | 2015-08-26 13:22:28 +0200 | [diff] [blame^] | 187 | m_pollController.expireTimedout(fn, max_delay); |
Jacob Erlbeck | 60f7703 | 2015-08-24 14:35:14 +0200 | [diff] [blame] | 188 | } |
| 189 | |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 190 | int BTS::add_paging(uint8_t chan_needed, uint8_t *identity_lv) |
| 191 | { |
| 192 | uint8_t l, trx, ts, any_tbf = 0; |
| 193 | struct gprs_rlcmac_tbf *tbf; |
Daniel Willmann | 1b3864f | 2014-07-30 13:25:19 +0200 | [diff] [blame] | 194 | struct llist_pods *lpods; |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 195 | struct gprs_rlcmac_paging *pag; |
| 196 | uint8_t slot_mask[8]; |
| 197 | int8_t first_ts; /* must be signed */ |
| 198 | |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 199 | llist_head *tbfs_lists[] = { |
| 200 | &m_bts.ul_tbfs, |
| 201 | &m_bts.dl_tbfs, |
| 202 | NULL |
| 203 | }; |
| 204 | |
| 205 | |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 206 | LOGP(DRLCMAC, LOGL_INFO, "Add RR paging: chan-needed=%d MI=%s\n", |
| 207 | chan_needed, osmo_hexdump(identity_lv + 1, identity_lv[0])); |
| 208 | |
| 209 | /* collect slots to page |
| 210 | * Mark slots for every TBF, but only mark one of it. |
| 211 | * Mark only the first slot found. |
| 212 | * Don't mark, if TBF uses a different slot that is already marked. */ |
| 213 | memset(slot_mask, 0, sizeof(slot_mask)); |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 214 | for (l = 0; tbfs_lists[l]; l++) { |
Daniel Willmann | 1b3864f | 2014-07-30 13:25:19 +0200 | [diff] [blame] | 215 | llist_pods_for_each_entry(tbf, tbfs_lists[l], list, lpods) { |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 216 | first_ts = -1; |
| 217 | for (ts = 0; ts < 8; ts++) { |
| 218 | if (tbf->pdch[ts]) { |
| 219 | /* remember the first slot found */ |
| 220 | if (first_ts < 0) |
| 221 | first_ts = ts; |
| 222 | /* break, if we already marked a slot */ |
Holger Hans Peter Freyther | ec80f82 | 2013-10-27 13:44:37 +0100 | [diff] [blame] | 223 | if ((slot_mask[tbf->trx->trx_no] & (1 << ts))) |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 224 | break; |
| 225 | } |
| 226 | } |
| 227 | /* mark first slot found, if none is marked already */ |
| 228 | if (ts == 8 && first_ts >= 0) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 229 | LOGP(DRLCMAC, LOGL_DEBUG, "- %s uses " |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 230 | "TRX=%d TS=%d, so we mark\n", |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 231 | tbf_name(tbf), |
| 232 | tbf->trx->trx_no, first_ts); |
Holger Hans Peter Freyther | ec80f82 | 2013-10-27 13:44:37 +0100 | [diff] [blame] | 233 | slot_mask[tbf->trx->trx_no] |= (1 << first_ts); |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 234 | } else |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 235 | LOGP(DRLCMAC, LOGL_DEBUG, "- %s uses " |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 236 | "already marked TRX=%d TS=%d\n", |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 237 | tbf_name(tbf), |
| 238 | tbf->trx->trx_no, ts); |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 239 | } |
| 240 | } |
| 241 | |
| 242 | /* Now we have a list of marked slots. Every TBF uses at least one |
| 243 | * of these slots. */ |
| 244 | |
| 245 | /* schedule paging to all marked slots */ |
| 246 | for (trx = 0; trx < 8; trx++) { |
| 247 | if (slot_mask[trx] == 0) |
| 248 | continue; |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 249 | for (ts = 0; ts < 8; ts++) { |
| 250 | if ((slot_mask[trx] & (1 << ts))) { |
| 251 | /* schedule */ |
| 252 | pag = talloc_zero(tall_pcu_ctx, |
| 253 | struct gprs_rlcmac_paging); |
| 254 | if (!pag) |
| 255 | return -ENOMEM; |
| 256 | pag->chan_needed = chan_needed; |
| 257 | memcpy(pag->identity_lv, identity_lv, |
| 258 | identity_lv[0] + 1); |
| 259 | m_bts.trx[trx].pdch[ts].add_paging(pag); |
| 260 | LOGP(DRLCMAC, LOGL_INFO, "Paging on PACCH of " |
| 261 | "TRX=%d TS=%d\n", trx, ts); |
Holger Hans Peter Freyther | 9446485 | 2013-10-19 18:33:52 +0200 | [diff] [blame] | 262 | any_tbf = 1; |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 263 | } |
| 264 | } |
| 265 | } |
| 266 | |
| 267 | if (!any_tbf) |
| 268 | LOGP(DRLCMAC, LOGL_INFO, "No paging, because no TBF\n"); |
| 269 | |
| 270 | return 0; |
| 271 | } |
| 272 | |
Daniel Willmann | fe6e2e4 | 2014-07-10 17:44:06 +0200 | [diff] [blame] | 273 | gprs_rlcmac_dl_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] | 274 | { |
Daniel Willmann | fe6e2e4 | 2014-07-10 17:44:06 +0200 | [diff] [blame] | 275 | struct gprs_rlcmac_dl_tbf *tbf; |
Daniel Willmann | 1b3864f | 2014-07-30 13:25:19 +0200 | [diff] [blame] | 276 | struct llist_pods *lpods; |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 277 | |
| 278 | /* only one TBF can poll on specific TS/FN, because scheduler can only |
| 279 | * schedule one downlink control block (with polling) at a FN per TS */ |
Daniel Willmann | 1b3864f | 2014-07-30 13:25:19 +0200 | [diff] [blame] | 280 | llist_pods_for_each_entry(tbf, &m_bts.dl_tbfs, list, lpods) { |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 281 | if (tbf->state_is_not(GPRS_RLCMAC_RELEASING) |
| 282 | && tbf->poll_state == GPRS_RLCMAC_POLL_SCHED |
Holger Hans Peter Freyther | ec80f82 | 2013-10-27 13:44:37 +0100 | [diff] [blame] | 283 | && tbf->poll_fn == fn && tbf->trx->trx_no == trx |
Daniel Willmann | 2207c5e | 2014-07-10 17:44:06 +0200 | [diff] [blame] | 284 | && tbf->control_ts == ts) { |
Daniel Willmann | fe6e2e4 | 2014-07-10 17:44:06 +0200 | [diff] [blame] | 285 | return static_cast<gprs_rlcmac_dl_tbf *>(tbf); |
Daniel Willmann | 2207c5e | 2014-07-10 17:44:06 +0200 | [diff] [blame] | 286 | } |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 287 | } |
Daniel Willmann | febf1a0 | 2014-07-02 17:58:16 +0200 | [diff] [blame] | 288 | return NULL; |
| 289 | } |
Daniel Willmann | fe6e2e4 | 2014-07-10 17:44:06 +0200 | [diff] [blame] | 290 | gprs_rlcmac_ul_tbf *BTS::ul_tbf_by_poll_fn(uint32_t fn, uint8_t trx, uint8_t ts) |
Daniel Willmann | febf1a0 | 2014-07-02 17:58:16 +0200 | [diff] [blame] | 291 | { |
Daniel Willmann | fe6e2e4 | 2014-07-10 17:44:06 +0200 | [diff] [blame] | 292 | struct gprs_rlcmac_ul_tbf *tbf; |
Daniel Willmann | 1b3864f | 2014-07-30 13:25:19 +0200 | [diff] [blame] | 293 | struct llist_pods *lpods; |
Daniel Willmann | febf1a0 | 2014-07-02 17:58:16 +0200 | [diff] [blame] | 294 | |
| 295 | /* only one TBF can poll on specific TS/FN, because scheduler can only |
| 296 | * schedule one downlink control block (with polling) at a FN per TS */ |
Daniel Willmann | 1b3864f | 2014-07-30 13:25:19 +0200 | [diff] [blame] | 297 | llist_pods_for_each_entry(tbf, &m_bts.ul_tbfs, list, lpods) { |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 298 | if (tbf->state_is_not(GPRS_RLCMAC_RELEASING) |
| 299 | && tbf->poll_state == GPRS_RLCMAC_POLL_SCHED |
Holger Hans Peter Freyther | ec80f82 | 2013-10-27 13:44:37 +0100 | [diff] [blame] | 300 | && tbf->poll_fn == fn && tbf->trx->trx_no == trx |
Daniel Willmann | 2207c5e | 2014-07-10 17:44:06 +0200 | [diff] [blame] | 301 | && tbf->control_ts == ts) { |
Daniel Willmann | fe6e2e4 | 2014-07-10 17:44:06 +0200 | [diff] [blame] | 302 | return static_cast<gprs_rlcmac_ul_tbf *>(tbf); |
Daniel Willmann | 2207c5e | 2014-07-10 17:44:06 +0200 | [diff] [blame] | 303 | } |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 304 | } |
| 305 | return NULL; |
| 306 | } |
| 307 | |
Daniel Willmann | 54044b0 | 2014-07-02 17:58:15 +0200 | [diff] [blame] | 308 | /* lookup downlink TBF Entity (by TFI) */ |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 309 | gprs_rlcmac_dl_tbf *BTS::dl_tbf_by_tfi(uint8_t tfi, uint8_t trx, uint8_t ts) |
Daniel Willmann | 54044b0 | 2014-07-02 17:58:15 +0200 | [diff] [blame] | 310 | { |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 311 | if (trx >= 8 || ts >= 8) |
| 312 | return NULL; |
| 313 | |
| 314 | return m_bts.trx[trx].pdch[ts].dl_tbf_by_tfi(tfi); |
Daniel Willmann | 54044b0 | 2014-07-02 17:58:15 +0200 | [diff] [blame] | 315 | } |
| 316 | |
| 317 | /* lookup uplink TBF Entity (by TFI) */ |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 318 | gprs_rlcmac_ul_tbf *BTS::ul_tbf_by_tfi(uint8_t tfi, uint8_t trx, uint8_t ts) |
Daniel Willmann | 54044b0 | 2014-07-02 17:58:15 +0200 | [diff] [blame] | 319 | { |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 320 | if (trx >= 8 || ts >= 8) |
Holger Hans Peter Freyther | f63cabd | 2013-10-26 19:10:43 +0200 | [diff] [blame] | 321 | return NULL; |
| 322 | |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 323 | return m_bts.trx[trx].pdch[ts].ul_tbf_by_tfi(tfi); |
Holger Hans Peter Freyther | f63cabd | 2013-10-26 19:10:43 +0200 | [diff] [blame] | 324 | } |
| 325 | |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 326 | /* |
| 327 | * Search for free TFI and return TFI, TRX. |
| 328 | * This method returns the first TFI that is currently not used in any PDCH of |
| 329 | * a TRX. The first TRX that contains such an TFI is returned. Negative values |
| 330 | * indicate errors. |
| 331 | */ |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 332 | int BTS::tfi_find_free(enum gprs_rlcmac_tbf_direction dir, |
| 333 | uint8_t *_trx, int8_t use_trx) |
| 334 | { |
| 335 | struct gprs_rlcmac_pdch *pdch; |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 336 | uint32_t free_tfis; |
| 337 | bool has_pdch = false; |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 338 | uint8_t trx_from, trx_to, trx, ts, tfi; |
| 339 | |
| 340 | if (use_trx >= 0 && use_trx < 8) |
| 341 | trx_from = trx_to = use_trx; |
| 342 | else { |
| 343 | trx_from = 0; |
| 344 | trx_to = 7; |
| 345 | } |
| 346 | |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 347 | /* find a TFI that is unused on all PDCH */ |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 348 | for (trx = trx_from; trx <= trx_to; trx++) { |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 349 | bool trx_has_pdch = false; |
| 350 | |
| 351 | free_tfis = 0xffffffff; |
| 352 | |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 353 | for (ts = 0; ts < 8; ts++) { |
| 354 | pdch = &m_bts.trx[trx].pdch[ts]; |
| 355 | if (!pdch->is_enabled()) |
| 356 | continue; |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 357 | free_tfis &= ~pdch->assigned_tfi(dir); |
| 358 | trx_has_pdch = true; |
| 359 | has_pdch = true; |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 360 | } |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 361 | if (trx_has_pdch && free_tfis) |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 362 | break; |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 363 | |
| 364 | free_tfis = 0; |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 365 | } |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 366 | if (!has_pdch) { |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 367 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH available.\n"); |
| 368 | return -EINVAL; |
| 369 | } |
| 370 | |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 371 | if (!free_tfis) { |
| 372 | LOGP(DRLCMAC, LOGL_NOTICE, "No TFI available.\n"); |
| 373 | return -EBUSY; |
| 374 | } |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 375 | |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 376 | |
| 377 | LOGP(DRLCMAC, LOGL_DEBUG, |
| 378 | "Searching for first unallocated TFI: TRX=%d\n", trx); |
| 379 | |
| 380 | /* find the first */ |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 381 | for (tfi = 0; tfi < 32; tfi++) { |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 382 | if (free_tfis & 1 << tfi) |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 383 | break; |
| 384 | } |
| 385 | |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 386 | OSMO_ASSERT(tfi < 32); |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 387 | |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 388 | LOGP(DRLCMAC, LOGL_DEBUG, " Found TFI=%d.\n", tfi); |
| 389 | *_trx = trx; |
| 390 | return tfi; |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 391 | } |
| 392 | |
Holger Hans Peter Freyther | 40cfaa6 | 2013-10-26 19:49:16 +0200 | [diff] [blame] | 393 | int BTS::rcv_imm_ass_cnf(const uint8_t *data, uint32_t fn) |
| 394 | { |
Jacob Erlbeck | 767193e | 2015-05-20 12:06:46 +0200 | [diff] [blame] | 395 | struct gprs_rlcmac_dl_tbf *dl_tbf = NULL; |
Holger Hans Peter Freyther | 40cfaa6 | 2013-10-26 19:49:16 +0200 | [diff] [blame] | 396 | uint8_t plen; |
| 397 | uint32_t tlli; |
Jacob Erlbeck | 767193e | 2015-05-20 12:06:46 +0200 | [diff] [blame] | 398 | GprsMs *ms; |
Holger Hans Peter Freyther | 40cfaa6 | 2013-10-26 19:49:16 +0200 | [diff] [blame] | 399 | |
| 400 | /* move to IA Rest Octets */ |
| 401 | plen = data[0] >> 2; |
| 402 | data += 1 + plen; |
| 403 | |
| 404 | if ((*data & 0xf0) != 0xd0) { |
| 405 | LOGP(DRLCMAC, LOGL_ERROR, "Got IMM.ASS confirm, but rest " |
| 406 | "octets do not start with bit sequence 'HH01' " |
| 407 | "(Packet Downlink Assignment)\n"); |
| 408 | return -EINVAL; |
| 409 | } |
| 410 | |
| 411 | /* get TLLI from downlink assignment */ |
| 412 | tlli = (*data++) << 28; |
| 413 | tlli |= (*data++) << 20; |
| 414 | tlli |= (*data++) << 12; |
| 415 | tlli |= (*data++) << 4; |
| 416 | tlli |= (*data++) >> 4; |
| 417 | |
Jacob Erlbeck | 767193e | 2015-05-20 12:06:46 +0200 | [diff] [blame] | 418 | ms = ms_by_tlli(tlli); |
| 419 | if (ms) |
| 420 | dl_tbf = ms->dl_tbf(); |
Daniel Willmann | 1dac2eb | 2014-08-07 12:37:34 +0200 | [diff] [blame] | 421 | if (!dl_tbf) { |
Holger Hans Peter Freyther | 40cfaa6 | 2013-10-26 19:49:16 +0200 | [diff] [blame] | 422 | LOGP(DRLCMAC, LOGL_ERROR, "Got IMM.ASS confirm, but TLLI=%08x " |
| 423 | "does not exit\n", tlli); |
| 424 | return -EINVAL; |
| 425 | } |
| 426 | |
| 427 | LOGP(DRLCMAC, LOGL_DEBUG, "Got IMM.ASS confirm for TLLI=%08x\n", tlli); |
| 428 | |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 429 | if (dl_tbf->m_wait_confirm) |
Daniel Willmann | 1dac2eb | 2014-08-07 12:37:34 +0200 | [diff] [blame] | 430 | tbf_timer_start(dl_tbf, 0, Tassign_agch); |
Holger Hans Peter Freyther | 40cfaa6 | 2013-10-26 19:49:16 +0200 | [diff] [blame] | 431 | |
| 432 | return 0; |
| 433 | } |
| 434 | |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 435 | int BTS::rcv_rach(uint8_t ra, uint32_t Fn, int16_t qta) |
| 436 | { |
Jacob Erlbeck | 1f33294 | 2015-05-04 08:21:17 +0200 | [diff] [blame] | 437 | struct gprs_rlcmac_ul_tbf *tbf = NULL; |
Holger Hans Peter Freyther | f37e514 | 2013-12-25 18:56:34 +0100 | [diff] [blame] | 438 | uint8_t trx_no, ts_no = 0; |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 439 | uint8_t sb = 0; |
| 440 | uint32_t sb_fn = 0; |
| 441 | int rc; |
| 442 | uint8_t plen; |
| 443 | |
Holger Hans Peter Freyther | c1ae226 | 2013-10-27 10:50:35 +0100 | [diff] [blame] | 444 | rach_frame(); |
| 445 | |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 446 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF on RACH, so we provide " |
| 447 | "one:\n"); |
| 448 | if ((ra & 0xf8) == 0x70) { |
| 449 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests single block " |
| 450 | "allocation\n"); |
| 451 | sb = 1; |
| 452 | } else if (m_bts.force_two_phase) { |
| 453 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests single phase access, " |
| 454 | "but we force two phase access\n"); |
| 455 | sb = 1; |
| 456 | } |
| 457 | if (qta < 0) |
| 458 | qta = 0; |
| 459 | if (qta > 252) |
| 460 | qta = 252; |
| 461 | if (sb) { |
Holger Hans Peter Freyther | f37e514 | 2013-12-25 18:56:34 +0100 | [diff] [blame] | 462 | 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] | 463 | if (rc < 0) |
| 464 | return rc; |
| 465 | LOGP(DRLCMAC, LOGL_DEBUG, "RX: [PCU <- BTS] RACH qbit-ta=%d " |
Jacob Erlbeck | ddfc0d5 | 2015-05-27 13:03:15 +0200 | [diff] [blame] | 466 | "ra=0x%02x, Fn=%d (%d,%d,%d), SBFn=%d\n", |
| 467 | qta, ra, |
| 468 | Fn, (Fn / (26 * 51)) % 32, Fn % 51, Fn % 26, |
| 469 | sb_fn); |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 470 | LOGP(DRLCMAC, LOGL_INFO, "TX: Immediate Assignment Uplink " |
| 471 | "(AGCH)\n"); |
| 472 | } else { |
| 473 | // Create new TBF |
| 474 | #warning "Copy and pate with other routines.." |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 475 | /* set class to 0, since we don't know the multislot class yet */ |
Jacob Erlbeck | 5879c64 | 2015-07-10 10:41:36 +0200 | [diff] [blame] | 476 | tbf = tbf_alloc_ul_tbf(&m_bts, NULL, -1, 0, 1); |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 477 | if (!tbf) { |
Holger Hans Peter Freyther | 90b87ea | 2013-10-27 10:38:31 +0100 | [diff] [blame] | 478 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH resource\n"); |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 479 | /* FIXME: send reject */ |
| 480 | return -EBUSY; |
| 481 | } |
Jacob Erlbeck | 9200ce6 | 2015-05-22 17:48:04 +0200 | [diff] [blame] | 482 | tbf->set_ta(qta >> 2); |
Daniel Willmann | eb10024 | 2014-08-08 11:43:53 +0200 | [diff] [blame] | 483 | tbf->set_state(GPRS_RLCMAC_FLOW); |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 484 | tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_CCCH); |
| 485 | tbf_timer_start(tbf, 3169, m_bts.t3169, 0); |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 486 | LOGP(DRLCMAC, LOGL_DEBUG, "%s [UPLINK] START\n", |
| 487 | tbf_name(tbf)); |
| 488 | LOGP(DRLCMAC, LOGL_DEBUG, "%s RX: [PCU <- BTS] RACH " |
| 489 | "qbit-ta=%d ra=0x%02x, Fn=%d (%d,%d,%d)\n", |
| 490 | tbf_name(tbf), |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 491 | 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] | 492 | LOGP(DRLCMAC, LOGL_INFO, "%s TX: START Immediate " |
| 493 | "Assignment Uplink (AGCH)\n", tbf_name(tbf)); |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 494 | } |
| 495 | bitvec *immediate_assignment = bitvec_alloc(22) /* without plen */; |
| 496 | bitvec_unhex(immediate_assignment, |
| 497 | "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
| 498 | if (sb) |
| 499 | 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] | 500 | Fn, qta >> 2, m_bts.trx[trx_no].arfcn, ts_no, |
| 501 | 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] | 502 | m_bts.alpha, m_bts.gamma, -1); |
| 503 | else |
| 504 | plen = Encoding::write_immediate_assignment(&m_bts, immediate_assignment, 0, ra, |
Jacob Erlbeck | 9200ce6 | 2015-05-22 17:48:04 +0200 | [diff] [blame] | 505 | Fn, tbf->ta(), tbf->trx->arfcn, tbf->first_ts, tbf->tsc(), |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 506 | tbf->tfi(), tbf->m_usf[tbf->first_ts], 0, 0, 0, 0, |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 507 | m_bts.alpha, m_bts.gamma, -1); |
| 508 | pcu_l1if_tx_agch(immediate_assignment, plen); |
| 509 | bitvec_free(immediate_assignment); |
| 510 | |
| 511 | return 0; |
| 512 | } |
| 513 | |
Holger Hans Peter Freyther | 24c1a5b | 2013-10-26 20:27:44 +0200 | [diff] [blame] | 514 | /* depending on the current TBF, we assign on PACCH or AGCH */ |
| 515 | void BTS::trigger_dl_ass( |
Daniel Willmann | 532a4b5 | 2014-08-07 12:39:26 +0200 | [diff] [blame] | 516 | struct gprs_rlcmac_dl_tbf *dl_tbf, |
Jacob Erlbeck | 71e5511 | 2015-05-21 11:10:15 +0200 | [diff] [blame] | 517 | struct gprs_rlcmac_tbf *old_tbf) |
Holger Hans Peter Freyther | 24c1a5b | 2013-10-26 20:27:44 +0200 | [diff] [blame] | 518 | { |
| 519 | /* stop pending timer */ |
Daniel Willmann | 532a4b5 | 2014-08-07 12:39:26 +0200 | [diff] [blame] | 520 | dl_tbf->stop_timer(); |
Holger Hans Peter Freyther | 24c1a5b | 2013-10-26 20:27:44 +0200 | [diff] [blame] | 521 | |
| 522 | /* check for downlink tbf: */ |
| 523 | if (old_tbf) { |
| 524 | LOGP(DRLCMAC, LOGL_DEBUG, "Send dowlink assignment on " |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 525 | "PACCH, because %s exists\n", tbf_name(old_tbf)); |
Holger Hans Peter Freyther | 24c1a5b | 2013-10-26 20:27:44 +0200 | [diff] [blame] | 526 | old_tbf->dl_ass_state = GPRS_RLCMAC_DL_ASS_SEND_ASS; |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 527 | |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 528 | old_tbf->was_releasing = old_tbf->state_is(GPRS_RLCMAC_WAIT_RELEASE); |
| 529 | |
Holger Hans Peter Freyther | 24c1a5b | 2013-10-26 20:27:44 +0200 | [diff] [blame] | 530 | /* change state */ |
Daniel Willmann | eb10024 | 2014-08-08 11:43:53 +0200 | [diff] [blame] | 531 | dl_tbf->set_state(GPRS_RLCMAC_ASSIGN); |
Daniel Willmann | 532a4b5 | 2014-08-07 12:39:26 +0200 | [diff] [blame] | 532 | dl_tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_PACCH); |
Holger Hans Peter Freyther | 24c1a5b | 2013-10-26 20:27:44 +0200 | [diff] [blame] | 533 | /* start timer */ |
Daniel Willmann | 532a4b5 | 2014-08-07 12:39:26 +0200 | [diff] [blame] | 534 | tbf_timer_start(dl_tbf, 0, Tassign_pacch); |
Holger Hans Peter Freyther | 24c1a5b | 2013-10-26 20:27:44 +0200 | [diff] [blame] | 535 | } else { |
Jacob Erlbeck | 71e5511 | 2015-05-21 11:10:15 +0200 | [diff] [blame] | 536 | LOGP(DRLCMAC, LOGL_DEBUG, "Send dowlink assignment for %s on PCH, no TBF exist (IMSI=%s)\n", tbf_name(dl_tbf), dl_tbf->imsi()); |
Daniel Willmann | 532a4b5 | 2014-08-07 12:39:26 +0200 | [diff] [blame] | 537 | dl_tbf->was_releasing = dl_tbf->state_is(GPRS_RLCMAC_WAIT_RELEASE); |
Holger Hans Peter Freyther | 24c1a5b | 2013-10-26 20:27:44 +0200 | [diff] [blame] | 538 | /* change state */ |
Daniel Willmann | eb10024 | 2014-08-08 11:43:53 +0200 | [diff] [blame] | 539 | dl_tbf->set_state(GPRS_RLCMAC_ASSIGN); |
Daniel Willmann | 532a4b5 | 2014-08-07 12:39:26 +0200 | [diff] [blame] | 540 | dl_tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_CCCH); |
Holger Hans Peter Freyther | 24c1a5b | 2013-10-26 20:27:44 +0200 | [diff] [blame] | 541 | /* send immediate assignment */ |
Jacob Erlbeck | 71e5511 | 2015-05-21 11:10:15 +0200 | [diff] [blame] | 542 | dl_tbf->bts->snd_dl_ass(dl_tbf, 0, dl_tbf->imsi()); |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 543 | dl_tbf->m_wait_confirm = 1; |
Holger Hans Peter Freyther | 24c1a5b | 2013-10-26 20:27:44 +0200 | [diff] [blame] | 544 | } |
| 545 | } |
| 546 | |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 547 | void BTS::snd_dl_ass(gprs_rlcmac_tbf *tbf, uint8_t poll, const char *imsi) |
| 548 | { |
| 549 | int plen; |
| 550 | |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 551 | 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] | 552 | bitvec *immediate_assignment = bitvec_alloc(22); /* without plen */ |
| 553 | bitvec_unhex(immediate_assignment, "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
| 554 | /* use request reference that has maximum distance to current time, |
| 555 | * so the assignment will not conflict with possible RACH requests. */ |
| 556 | plen = Encoding::write_immediate_assignment(&m_bts, immediate_assignment, 1, 125, |
Jacob Erlbeck | 9200ce6 | 2015-05-22 17:48:04 +0200 | [diff] [blame] | 557 | (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] | 558 | 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] | 559 | tbf->poll_fn, 0, m_bts.alpha, m_bts.gamma, -1); |
| 560 | pcu_l1if_tx_pch(immediate_assignment, plen, imsi); |
| 561 | bitvec_free(immediate_assignment); |
| 562 | } |
| 563 | |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 564 | |
Jacob Erlbeck | cb1b494 | 2015-06-19 10:59:58 +0200 | [diff] [blame] | 565 | GprsMs *BTS::ms_alloc(uint8_t ms_class) |
| 566 | { |
| 567 | GprsMs *ms; |
| 568 | ms = ms_store().create_ms(); |
| 569 | |
| 570 | ms->set_timeout(m_bts.ms_idle_sec); |
| 571 | ms->set_ms_class(ms_class); |
| 572 | |
| 573 | return ms; |
| 574 | } |
| 575 | |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 576 | /* |
| 577 | * PDCH code below. TODO: move to a separate file |
| 578 | */ |
| 579 | |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 580 | void gprs_rlcmac_pdch::enable() |
| 581 | { |
| 582 | /* TODO: Check if there are still allocated resources.. */ |
| 583 | INIT_LLIST_HEAD(&paging_list); |
| 584 | m_is_enabled = 1; |
| 585 | } |
| 586 | |
| 587 | void gprs_rlcmac_pdch::disable() |
| 588 | { |
| 589 | /* TODO.. kick free_resources once we know the TRX/TS we are on */ |
| 590 | m_is_enabled = 0; |
| 591 | } |
| 592 | |
Holger Hans Peter Freyther | 09ef27a | 2013-10-20 16:37:05 +0200 | [diff] [blame] | 593 | void gprs_rlcmac_pdch::free_resources() |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 594 | { |
| 595 | struct gprs_rlcmac_paging *pag; |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 596 | |
| 597 | /* we are not enabled. there should be no resources */ |
| 598 | if (!is_enabled()) |
| 599 | return; |
| 600 | |
| 601 | /* kick all TBF on slot */ |
| 602 | gprs_rlcmac_tbf::free_all(this); |
| 603 | |
| 604 | /* flush all pending paging messages */ |
Holger Hans Peter Freyther | 24e98d0 | 2013-10-19 18:15:44 +0200 | [diff] [blame] | 605 | while ((pag = dequeue_paging())) |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 606 | talloc_free(pag); |
| 607 | |
Holger Hans Peter Freyther | 09ef27a | 2013-10-20 16:37:05 +0200 | [diff] [blame] | 608 | trx->bts->sba()->free_resources(this); |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 609 | } |
Holger Hans Peter Freyther | 24e98d0 | 2013-10-19 18:15:44 +0200 | [diff] [blame] | 610 | |
| 611 | struct gprs_rlcmac_paging *gprs_rlcmac_pdch::dequeue_paging() |
| 612 | { |
| 613 | struct gprs_rlcmac_paging *pag; |
| 614 | |
| 615 | if (llist_empty(&paging_list)) |
| 616 | return NULL; |
| 617 | pag = llist_entry(paging_list.next, struct gprs_rlcmac_paging, list); |
| 618 | llist_del(&pag->list); |
| 619 | |
| 620 | return pag; |
| 621 | } |
| 622 | |
| 623 | struct msgb *gprs_rlcmac_pdch::packet_paging_request() |
| 624 | { |
| 625 | struct gprs_rlcmac_paging *pag; |
| 626 | struct msgb *msg; |
| 627 | unsigned wp = 0, len; |
| 628 | |
| 629 | /* no paging, no message */ |
| 630 | pag = dequeue_paging(); |
| 631 | if (!pag) |
| 632 | return NULL; |
| 633 | |
| 634 | LOGP(DRLCMAC, LOGL_DEBUG, "Scheduling paging\n"); |
| 635 | |
| 636 | /* alloc message */ |
| 637 | msg = msgb_alloc(23, "pag ctrl block"); |
| 638 | if (!msg) { |
| 639 | talloc_free(pag); |
| 640 | return NULL; |
| 641 | } |
| 642 | bitvec *pag_vec = bitvec_alloc(23); |
| 643 | if (!pag_vec) { |
| 644 | msgb_free(msg); |
| 645 | talloc_free(pag); |
| 646 | return NULL; |
| 647 | } |
Holger Hans Peter Freyther | 63f29d6 | 2013-10-19 19:04:03 +0200 | [diff] [blame] | 648 | wp = Encoding::write_packet_paging_request(pag_vec); |
Holger Hans Peter Freyther | 24e98d0 | 2013-10-19 18:15:44 +0200 | [diff] [blame] | 649 | |
| 650 | /* loop until message is full */ |
| 651 | while (pag) { |
| 652 | /* try to add paging */ |
| 653 | if ((pag->identity_lv[1] & 0x07) == 4) { |
| 654 | /* TMSI */ |
| 655 | LOGP(DRLCMAC, LOGL_DEBUG, "- TMSI=0x%08x\n", |
| 656 | ntohl(*((uint32_t *)(pag->identity_lv + 1)))); |
| 657 | len = 1 + 1 + 1 + 32 + 2 + 1; |
| 658 | if (pag->identity_lv[0] != 5) { |
| 659 | LOGP(DRLCMAC, LOGL_ERROR, "TMSI paging with " |
| 660 | "MI != 5 octets!\n"); |
| 661 | goto continue_next; |
| 662 | } |
| 663 | } else { |
| 664 | /* MI */ |
| 665 | LOGP(DRLCMAC, LOGL_DEBUG, "- MI=%s\n", |
| 666 | osmo_hexdump(pag->identity_lv + 1, |
| 667 | pag->identity_lv[0])); |
| 668 | len = 1 + 1 + 1 + 4 + (pag->identity_lv[0]<<3) + 2 + 1; |
| 669 | if (pag->identity_lv[0] > 8) { |
| 670 | LOGP(DRLCMAC, LOGL_ERROR, "Paging with " |
| 671 | "MI > 8 octets!\n"); |
| 672 | goto continue_next; |
| 673 | } |
| 674 | } |
| 675 | if (wp + len > 184) { |
| 676 | LOGP(DRLCMAC, LOGL_DEBUG, "- Does not fit, so schedule " |
| 677 | "next time\n"); |
| 678 | /* put back paging record, because does not fit */ |
| 679 | llist_add_tail(&pag->list, &paging_list); |
| 680 | break; |
| 681 | } |
Holger Hans Peter Freyther | 63f29d6 | 2013-10-19 19:04:03 +0200 | [diff] [blame] | 682 | 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] | 683 | pag->identity_lv + 1, pag->chan_needed); |
| 684 | |
| 685 | continue_next: |
| 686 | talloc_free(pag); |
| 687 | pag = dequeue_paging(); |
| 688 | } |
| 689 | |
| 690 | bitvec_pack(pag_vec, msgb_put(msg, 23)); |
| 691 | RlcMacDownlink_t * mac_control_block = (RlcMacDownlink_t *)talloc_zero(tall_pcu_ctx, RlcMacDownlink_t); |
| 692 | LOGP(DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ TX : Packet Paging Request +++++++++++++++++++++++++\n"); |
| 693 | decode_gsm_rlcmac_downlink(pag_vec, mac_control_block); |
| 694 | LOGPC(DCSN1, LOGL_NOTICE, "\n"); |
| 695 | LOGP(DRLCMAC, LOGL_DEBUG, "------------------------- TX : Packet Paging Request -------------------------\n"); |
| 696 | bitvec_free(pag_vec); |
| 697 | talloc_free(mac_control_block); |
| 698 | |
| 699 | return msg; |
| 700 | } |
| 701 | |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 702 | void gprs_rlcmac_pdch::add_paging(struct gprs_rlcmac_paging *pag) |
| 703 | { |
| 704 | llist_add(&pag->list, &paging_list); |
| 705 | } |
Holger Hans Peter Freyther | 9ae367f | 2013-10-26 16:42:38 +0200 | [diff] [blame] | 706 | |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 707 | /* receive UL data block |
| 708 | * |
| 709 | * The blocks are defragmented and forwarded as LLC frames, if complete. |
| 710 | */ |
Jacob Erlbeck | 20f6fd1 | 2015-06-08 11:05:45 +0200 | [diff] [blame] | 711 | int gprs_rlcmac_pdch::rcv_data_block_acknowledged(uint8_t *data, uint8_t len, |
| 712 | struct pcu_l1_meas *meas) |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 713 | { |
Daniel Willmann | 0d12a2f | 2014-07-10 17:44:07 +0200 | [diff] [blame] | 714 | struct gprs_rlcmac_ul_tbf *tbf; |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 715 | struct rlc_ul_header *rh = (struct rlc_ul_header *)data; |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 716 | |
| 717 | switch (len) { |
| 718 | case 54: |
| 719 | /* omitting spare bits */ |
| 720 | len = 53; |
| 721 | break; |
| 722 | case 40: |
| 723 | /* omitting spare bits */ |
| 724 | len = 39; |
| 725 | break; |
| 726 | case 34: |
| 727 | /* omitting spare bits */ |
| 728 | len = 33; |
| 729 | break; |
| 730 | case 23: |
| 731 | break; |
| 732 | default: |
Holger Hans Peter Freyther | 1587764 | 2013-10-27 09:50:15 +0100 | [diff] [blame] | 733 | bts()->decode_error(); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 734 | LOGP(DRLCMACUL, LOGL_ERROR, "Dropping data block with invalid" |
| 735 | "length: %d)\n", len); |
| 736 | return -EINVAL; |
| 737 | } |
| 738 | |
| 739 | /* find TBF inst from given TFI */ |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 740 | tbf = ul_tbf_by_tfi(rh->tfi); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 741 | if (!tbf) { |
Holger Hans Peter Freyther | 15bb1a2 | 2013-10-27 12:30:46 +0100 | [diff] [blame] | 742 | LOGP(DRLCMACUL, LOGL_NOTICE, "UL DATA unknown TFI=%d\n", |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 743 | rh->tfi); |
| 744 | return 0; |
| 745 | } |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 746 | |
Jacob Erlbeck | 20f6fd1 | 2015-06-08 11:05:45 +0200 | [diff] [blame] | 747 | return tbf->rcv_data_block_acknowledged(data, len, meas); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 748 | } |
| 749 | |
Holger Hans Peter Freyther | e1a075a | 2013-10-27 13:35:30 +0100 | [diff] [blame] | 750 | 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] | 751 | { |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 752 | struct gprs_rlcmac_tbf *tbf, *new_tbf; |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 753 | uint32_t tlli = 0; |
| 754 | |
Holger Hans Peter Freyther | e1a075a | 2013-10-27 13:35:30 +0100 | [diff] [blame] | 755 | tlli = packet->TLLI; |
Daniel Willmann | febf1a0 | 2014-07-02 17:58:16 +0200 | [diff] [blame] | 756 | tbf = bts()->ul_tbf_by_poll_fn(fn, trx_no(), ts_no); |
| 757 | if (!tbf) |
| 758 | tbf = bts()->dl_tbf_by_poll_fn(fn, trx_no(), ts_no); |
| 759 | |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 760 | if (!tbf) { |
| 761 | LOGP(DRLCMAC, LOGL_NOTICE, "PACKET CONTROL ACK with " |
Holger Hans Peter Freyther | 15bb1a2 | 2013-10-27 12:30:46 +0100 | [diff] [blame] | 762 | "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] | 763 | fn, tlli, trx_no(), ts_no); |
| 764 | return; |
| 765 | } |
Jacob Erlbeck | d3eac28 | 2015-05-22 15:47:55 +0200 | [diff] [blame] | 766 | tbf->update_ms(tlli, GPRS_RLCMAC_UL_TBF); |
Jacob Erlbeck | fecece0 | 2015-05-08 12:13:08 +0200 | [diff] [blame] | 767 | |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 768 | 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] | 769 | tbf->poll_state = GPRS_RLCMAC_POLL_NONE; |
| 770 | |
| 771 | /* check if this control ack belongs to packet uplink ack */ |
| 772 | 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] | 773 | 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] | 774 | tbf->ul_ack_state = GPRS_RLCMAC_UL_ACK_NONE; |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 775 | if ((tbf->state_flags & |
| 776 | (1 << GPRS_RLCMAC_FLAG_TO_UL_ACK))) { |
| 777 | tbf->state_flags &= |
| 778 | ~(1 << GPRS_RLCMAC_FLAG_TO_UL_ACK); |
| 779 | LOGP(DRLCMAC, LOGL_NOTICE, "Recovered uplink " |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 780 | "ack for UL %s\n", tbf_name(tbf)); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 781 | } |
| 782 | tbf_free(tbf); |
| 783 | return; |
| 784 | } |
| 785 | 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] | 786 | 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] | 787 | /* reset N3105 */ |
| 788 | tbf->n3105 = 0; |
| 789 | tbf->dl_ass_state = GPRS_RLCMAC_DL_ASS_NONE; |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 790 | |
Jacob Erlbeck | d3eac28 | 2015-05-22 15:47:55 +0200 | [diff] [blame] | 791 | new_tbf = tbf->ms() ? tbf->ms()->dl_tbf() : NULL; |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 792 | if (!new_tbf) { |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 793 | LOGP(DRLCMAC, LOGL_ERROR, "Got ACK, but DL " |
Holger Hans Peter Freyther | 875fc89 | 2013-10-27 13:35:46 +0100 | [diff] [blame] | 794 | "TBF is gone TLLI=0x%08x\n", tlli); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 795 | return; |
| 796 | } |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 797 | if (tbf->state_is(GPRS_RLCMAC_WAIT_RELEASE)) |
| 798 | tbf_free(tbf); |
| 799 | |
| 800 | new_tbf->set_state(GPRS_RLCMAC_FLOW); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 801 | /* stop pending assignment timer */ |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 802 | new_tbf->stop_timer(); |
| 803 | if ((new_tbf->state_flags & |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 804 | (1 << GPRS_RLCMAC_FLAG_TO_DL_ASS))) { |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 805 | new_tbf->state_flags &= |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 806 | ~(1 << GPRS_RLCMAC_FLAG_TO_DL_ASS); |
| 807 | LOGP(DRLCMAC, LOGL_NOTICE, "Recovered downlink " |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 808 | "assignment for %s\n", tbf_name(new_tbf)); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 809 | } |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 810 | tbf_assign_control_ts(new_tbf); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 811 | return; |
| 812 | } |
| 813 | 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] | 814 | 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] | 815 | /* reset N3105 */ |
| 816 | tbf->n3105 = 0; |
| 817 | tbf->ul_ass_state = GPRS_RLCMAC_UL_ASS_NONE; |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 818 | |
Jacob Erlbeck | d3eac28 | 2015-05-22 15:47:55 +0200 | [diff] [blame] | 819 | new_tbf = tbf->ms() ? tbf->ms()->ul_tbf() : NULL; |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 820 | if (!new_tbf) { |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 821 | LOGP(DRLCMAC, LOGL_ERROR, "Got ACK, but UL " |
Holger Hans Peter Freyther | 8d0e489 | 2013-10-27 12:42:58 +0100 | [diff] [blame] | 822 | "TBF is gone TLLI=0x%08x\n", tlli); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 823 | return; |
| 824 | } |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 825 | if (tbf->state_is(GPRS_RLCMAC_WAIT_RELEASE)) |
| 826 | tbf_free(tbf); |
| 827 | |
| 828 | new_tbf->set_state(GPRS_RLCMAC_FLOW); |
| 829 | if ((new_tbf->state_flags & |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 830 | (1 << GPRS_RLCMAC_FLAG_TO_UL_ASS))) { |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 831 | new_tbf->state_flags &= |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 832 | ~(1 << GPRS_RLCMAC_FLAG_TO_UL_ASS); |
| 833 | LOGP(DRLCMAC, LOGL_NOTICE, "Recovered uplink " |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 834 | "assignment for UL %s\n", tbf_name(new_tbf)); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 835 | } |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 836 | tbf_assign_control_ts(new_tbf); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 837 | return; |
| 838 | } |
| 839 | LOGP(DRLCMAC, LOGL_ERROR, "Error: received PACET CONTROL ACK " |
| 840 | "at no request\n"); |
| 841 | } |
| 842 | |
Jacob Erlbeck | 51b1151 | 2015-06-11 16:54:50 +0200 | [diff] [blame] | 843 | static void get_rx_qual_meas(struct pcu_l1_meas *meas, uint8_t rx_qual_enc) |
| 844 | { |
| 845 | static const int16_t rx_qual_map[] = { |
| 846 | 0, /* 0,14 % */ |
| 847 | 0, /* 0,28 % */ |
| 848 | 1, /* 0,57 % */ |
| 849 | 1, /* 1,13 % */ |
| 850 | 2, /* 2,26 % */ |
| 851 | 5, /* 4,53 % */ |
| 852 | 9, /* 9,05 % */ |
| 853 | 18, /* 18,10 % */ |
| 854 | }; |
| 855 | |
| 856 | meas->set_ms_rx_qual(rx_qual_map[ |
| 857 | OSMO_MIN(rx_qual_enc, ARRAY_SIZE(rx_qual_map)-1) |
| 858 | ]); |
| 859 | } |
| 860 | |
| 861 | static void get_meas(struct pcu_l1_meas *meas, |
| 862 | const Packet_Resource_Request_t *qr) |
| 863 | { |
| 864 | unsigned i; |
| 865 | |
| 866 | meas->set_ms_c_value(qr->C_VALUE); |
| 867 | if (qr->Exist_SIGN_VAR) |
| 868 | meas->set_ms_sign_var((qr->SIGN_VAR + 2) / 4); /* SIGN_VAR * 0.25 dB */ |
| 869 | |
| 870 | for (i = 0; i < OSMO_MIN(ARRAY_SIZE(qr->Slot), ARRAY_SIZE(meas->ts)); i++) |
| 871 | { |
Jacob Erlbeck | da1a79e | 2015-06-11 18:09:00 +0200 | [diff] [blame] | 872 | if (qr->Slot[i].Exist) { |
| 873 | LOGP(DRLCMAC, LOGL_INFO, |
| 874 | "Packet resource request: i_level[%d] = %d\n", |
| 875 | i, qr->Slot[i].I_LEVEL); |
Jacob Erlbeck | 51b1151 | 2015-06-11 16:54:50 +0200 | [diff] [blame] | 876 | meas->set_ms_i_level(i, -2 * qr->Slot[i].I_LEVEL); |
Jacob Erlbeck | da1a79e | 2015-06-11 18:09:00 +0200 | [diff] [blame] | 877 | } |
Jacob Erlbeck | 51b1151 | 2015-06-11 16:54:50 +0200 | [diff] [blame] | 878 | } |
| 879 | } |
| 880 | |
| 881 | static void get_meas(struct pcu_l1_meas *meas, |
| 882 | const Channel_Quality_Report_t *qr) |
| 883 | { |
| 884 | unsigned i; |
| 885 | |
| 886 | get_rx_qual_meas(meas, qr->RXQUAL); |
| 887 | meas->set_ms_c_value(qr->C_VALUE); |
| 888 | meas->set_ms_sign_var((qr->SIGN_VAR + 2) / 4); /* SIGN_VAR * 0.25 dB */ |
| 889 | |
| 890 | for (i = 0; i < OSMO_MIN(ARRAY_SIZE(qr->Slot), ARRAY_SIZE(meas->ts)); i++) |
| 891 | { |
Jacob Erlbeck | da1a79e | 2015-06-11 18:09:00 +0200 | [diff] [blame] | 892 | if (qr->Slot[i].Exist) { |
| 893 | LOGP(DRLCMAC, LOGL_INFO, |
| 894 | "Channel quality report: i_level[%d] = %d\n", |
| 895 | i, qr->Slot[i].I_LEVEL_TN); |
Jacob Erlbeck | 51b1151 | 2015-06-11 16:54:50 +0200 | [diff] [blame] | 896 | meas->set_ms_i_level(i, -2 * qr->Slot[i].I_LEVEL_TN); |
Jacob Erlbeck | da1a79e | 2015-06-11 18:09:00 +0200 | [diff] [blame] | 897 | } |
Jacob Erlbeck | 51b1151 | 2015-06-11 16:54:50 +0200 | [diff] [blame] | 898 | } |
| 899 | } |
| 900 | |
Holger Hans Peter Freyther | 5da2014 | 2013-10-27 11:41:01 +0100 | [diff] [blame] | 901 | 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] | 902 | { |
| 903 | int8_t tfi = 0; /* must be signed */ |
Daniel Willmann | 6c813fc | 2014-07-30 19:12:27 +0200 | [diff] [blame] | 904 | struct gprs_rlcmac_dl_tbf *tbf; |
Holger Hans Peter Freyther | 5a96581 | 2013-10-27 11:07:17 +0100 | [diff] [blame] | 905 | int rc; |
Jacob Erlbeck | 51b1151 | 2015-06-11 16:54:50 +0200 | [diff] [blame] | 906 | struct pcu_l1_meas meas; |
Holger Hans Peter Freyther | 5a96581 | 2013-10-27 11:07:17 +0100 | [diff] [blame] | 907 | |
Holger Hans Peter Freyther | 5da2014 | 2013-10-27 11:41:01 +0100 | [diff] [blame] | 908 | tfi = ack_nack->DOWNLINK_TFI; |
Daniel Willmann | febf1a0 | 2014-07-02 17:58:16 +0200 | [diff] [blame] | 909 | 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] | 910 | if (!tbf) { |
| 911 | LOGP(DRLCMAC, LOGL_NOTICE, "PACKET DOWNLINK ACK with " |
| 912 | "unknown FN=%u TFI=%d (TRX %d TS %d)\n", |
| 913 | fn, tfi, trx_no(), ts_no); |
| 914 | return; |
| 915 | } |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 916 | if (tbf->tfi() != tfi) { |
Holger Hans Peter Freyther | 5a96581 | 2013-10-27 11:07:17 +0100 | [diff] [blame] | 917 | LOGP(DRLCMAC, LOGL_NOTICE, "PACKET DOWNLINK ACK with " |
| 918 | "wrong TFI=%d, ignoring!\n", tfi); |
| 919 | return; |
| 920 | } |
| 921 | tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_DL_ACK); |
| 922 | if ((tbf->state_flags & (1 << GPRS_RLCMAC_FLAG_TO_DL_ACK))) { |
| 923 | tbf->state_flags &= ~(1 << GPRS_RLCMAC_FLAG_TO_DL_ACK); |
| 924 | LOGP(DRLCMAC, LOGL_NOTICE, "Recovered downlink ack " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 925 | "for %s\n", tbf_name(tbf)); |
Holger Hans Peter Freyther | 5a96581 | 2013-10-27 11:07:17 +0100 | [diff] [blame] | 926 | } |
| 927 | /* reset N3105 */ |
| 928 | tbf->n3105 = 0; |
| 929 | tbf->stop_t3191(); |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 930 | 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] | 931 | tbf->poll_state = GPRS_RLCMAC_POLL_NONE; |
Holger Hans Peter Freyther | 5a96581 | 2013-10-27 11:07:17 +0100 | [diff] [blame] | 932 | |
Daniel Willmann | fc03bbe | 2014-05-30 17:57:59 +0200 | [diff] [blame] | 933 | rc = tbf->rcvd_dl_ack( |
Holger Hans Peter Freyther | 5da2014 | 2013-10-27 11:41:01 +0100 | [diff] [blame] | 934 | ack_nack->Ack_Nack_Description.FINAL_ACK_INDICATION, |
| 935 | ack_nack->Ack_Nack_Description.STARTING_SEQUENCE_NUMBER, |
| 936 | ack_nack->Ack_Nack_Description.RECEIVED_BLOCK_BITMAP); |
Holger Hans Peter Freyther | 5a96581 | 2013-10-27 11:07:17 +0100 | [diff] [blame] | 937 | if (rc == 1) { |
| 938 | tbf_free(tbf); |
| 939 | return; |
| 940 | } |
| 941 | /* check for channel request */ |
Holger Hans Peter Freyther | 5da2014 | 2013-10-27 11:41:01 +0100 | [diff] [blame] | 942 | if (ack_nack->Exist_Channel_Request_Description) { |
Holger Hans Peter Freyther | 5a96581 | 2013-10-27 11:07:17 +0100 | [diff] [blame] | 943 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF in ack " |
| 944 | "message, so we provide one:\n"); |
Jacob Erlbeck | d3eac28 | 2015-05-22 15:47:55 +0200 | [diff] [blame] | 945 | |
| 946 | /* This call will register the new TBF with the MS on success */ |
Jacob Erlbeck | befc760 | 2015-06-02 12:33:30 +0200 | [diff] [blame] | 947 | tbf_alloc_ul(bts_data(), tbf->trx->trx_no, tbf->ms_class(), |
Jacob Erlbeck | e2e004e | 2015-06-18 17:16:26 +0200 | [diff] [blame] | 948 | tbf->tlli(), tbf->ta(), tbf->ms()); |
Jacob Erlbeck | d3eac28 | 2015-05-22 15:47:55 +0200 | [diff] [blame] | 949 | |
Holger Hans Peter Freyther | 5a96581 | 2013-10-27 11:07:17 +0100 | [diff] [blame] | 950 | /* schedule uplink assignment */ |
| 951 | tbf->ul_ass_state = GPRS_RLCMAC_UL_ASS_SEND_ASS; |
| 952 | } |
Jacob Erlbeck | 51b1151 | 2015-06-11 16:54:50 +0200 | [diff] [blame] | 953 | /* get measurements */ |
| 954 | if (tbf->ms()) { |
| 955 | get_meas(&meas, &ack_nack->Channel_Quality_Report); |
| 956 | tbf->ms()->update_l1_meas(&meas); |
| 957 | } |
Holger Hans Peter Freyther | 5a96581 | 2013-10-27 11:07:17 +0100 | [diff] [blame] | 958 | } |
| 959 | |
Holger Hans Peter Freyther | 7a34471 | 2013-10-27 11:37:53 +0100 | [diff] [blame] | 960 | 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] | 961 | { |
Holger Hans Peter Freyther | fcbc702 | 2013-10-26 17:38:37 +0200 | [diff] [blame] | 962 | struct gprs_rlcmac_sba *sba; |
Holger Hans Peter Freyther | fcbc702 | 2013-10-26 17:38:37 +0200 | [diff] [blame] | 963 | |
Holger Hans Peter Freyther | 7a34471 | 2013-10-27 11:37:53 +0100 | [diff] [blame] | 964 | if (request->ID.UnionType) { |
Jacob Erlbeck | e43460b | 2015-05-13 13:33:12 +0200 | [diff] [blame] | 965 | struct gprs_rlcmac_ul_tbf *ul_tbf = NULL; |
| 966 | struct gprs_rlcmac_dl_tbf *dl_tbf = NULL; |
Holger Hans Peter Freyther | 8021644 | 2013-10-27 15:42:25 +0100 | [diff] [blame] | 967 | uint32_t tlli = request->ID.u.TLLI; |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 968 | uint8_t ms_class = 0; |
Jacob Erlbeck | 9200ce6 | 2015-05-22 17:48:04 +0200 | [diff] [blame] | 969 | uint8_t ta = 0; |
Jacob Erlbeck | 51b1151 | 2015-06-11 16:54:50 +0200 | [diff] [blame] | 970 | struct pcu_l1_meas meas; |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 971 | |
Jacob Erlbeck | e43460b | 2015-05-13 13:33:12 +0200 | [diff] [blame] | 972 | GprsMs *ms = bts()->ms_by_tlli(tlli); |
| 973 | /* Keep the ms, even if it gets idle temporarily */ |
| 974 | GprsMs::Guard guard(ms); |
| 975 | |
| 976 | if (ms) { |
| 977 | ul_tbf = ms->ul_tbf(); |
| 978 | dl_tbf = ms->dl_tbf(); |
Jacob Erlbeck | 9200ce6 | 2015-05-22 17:48:04 +0200 | [diff] [blame] | 979 | ta = ms->ta(); |
Jacob Erlbeck | e43460b | 2015-05-13 13:33:12 +0200 | [diff] [blame] | 980 | } |
| 981 | |
Daniel Willmann | 0d12a2f | 2014-07-10 17:44:07 +0200 | [diff] [blame] | 982 | if (ul_tbf) { |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 983 | LOGP(DRLCMACUL, LOGL_NOTICE, "Got RACH from " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 984 | "TLLI=0x%08x while %s still " |
Jacob Erlbeck | 537b149 | 2015-08-21 17:52:07 +0200 | [diff] [blame] | 985 | "exists. Killing pending UL TBF\n", |
Daniel Willmann | 0d12a2f | 2014-07-10 17:44:07 +0200 | [diff] [blame] | 986 | tlli, tbf_name(ul_tbf)); |
| 987 | tbf_free(ul_tbf); |
| 988 | ul_tbf = NULL; |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 989 | } |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 990 | |
Jacob Erlbeck | e91bd3b | 2015-08-21 18:19:29 +0200 | [diff] [blame] | 991 | if (dl_tbf) |
| 992 | LOGP(DRLCMACUL, LOGL_INFO, "Got RACH from " |
| 993 | "TLLI=0x%08x while %s still exists.\n", |
| 994 | tlli, tbf_name(dl_tbf)); |
| 995 | |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 996 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF " |
| 997 | "in packet resource request of single " |
| 998 | "block, so we provide one:\n"); |
| 999 | sba = bts()->sba()->find(this, fn); |
| 1000 | if (!sba) { |
| 1001 | LOGP(DRLCMAC, LOGL_NOTICE, "MS requests UL TBF " |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 1002 | "in packet resource request of single " |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 1003 | "block, but there is no resource request " |
| 1004 | "scheduled!\n"); |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 1005 | } else { |
| 1006 | ta = sba->ta; |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 1007 | bts()->sba()->free_sba(sba); |
| 1008 | } |
| 1009 | if (request->Exist_MS_Radio_Access_capability) |
| 1010 | ms_class = Decoding::get_ms_class_by_capability(&request->MS_Radio_Access_capability); |
| 1011 | if (!ms_class) |
| 1012 | LOGP(DRLCMAC, LOGL_NOTICE, "MS does not give us a class.\n"); |
Jacob Erlbeck | 6d86628 | 2015-06-19 09:08:23 +0200 | [diff] [blame] | 1013 | ul_tbf = tbf_alloc_ul(bts_data(), trx_no(), ms_class, tlli, ta, ms); |
Daniel Willmann | 0d12a2f | 2014-07-10 17:44:07 +0200 | [diff] [blame] | 1014 | if (!ul_tbf) |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 1015 | return; |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 1016 | |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 1017 | /* set control ts to current MS's TS, until assignment complete */ |
| 1018 | LOGP(DRLCMAC, LOGL_DEBUG, "Change control TS to %d until assinment is complete.\n", ts_no); |
Daniel Willmann | 0d12a2f | 2014-07-10 17:44:07 +0200 | [diff] [blame] | 1019 | ul_tbf->control_ts = ts_no; |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 1020 | /* schedule uplink assignment */ |
Daniel Willmann | 0d12a2f | 2014-07-10 17:44:07 +0200 | [diff] [blame] | 1021 | ul_tbf->ul_ass_state = GPRS_RLCMAC_UL_ASS_SEND_ASS; |
Jacob Erlbeck | 51b1151 | 2015-06-11 16:54:50 +0200 | [diff] [blame] | 1022 | |
| 1023 | /* get measurements */ |
| 1024 | if (ul_tbf->ms()) { |
| 1025 | get_meas(&meas, request); |
| 1026 | ul_tbf->ms()->update_l1_meas(&meas); |
| 1027 | } |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 1028 | return; |
| 1029 | } |
| 1030 | |
| 1031 | if (request->ID.u.Global_TFI.UnionType) { |
Daniel Willmann | 0d12a2f | 2014-07-10 17:44:07 +0200 | [diff] [blame] | 1032 | struct gprs_rlcmac_dl_tbf *dl_tbf; |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 1033 | int8_t tfi = request->ID.u.Global_TFI.u.DOWNLINK_TFI; |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 1034 | dl_tbf = bts()->dl_tbf_by_tfi(tfi, trx_no(), ts_no); |
Daniel Willmann | 0d12a2f | 2014-07-10 17:44:07 +0200 | [diff] [blame] | 1035 | if (!dl_tbf) { |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 1036 | 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] | 1037 | return; |
| 1038 | } |
Daniel Willmann | 0d12a2f | 2014-07-10 17:44:07 +0200 | [diff] [blame] | 1039 | LOGP(DRLCMAC, LOGL_ERROR, |
| 1040 | "RX: [PCU <- BTS] %s FIXME: Packet resource request\n", |
| 1041 | tbf_name(dl_tbf)); |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 1042 | } else { |
Daniel Willmann | 0d12a2f | 2014-07-10 17:44:07 +0200 | [diff] [blame] | 1043 | struct gprs_rlcmac_ul_tbf *ul_tbf; |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 1044 | int8_t tfi = request->ID.u.Global_TFI.u.UPLINK_TFI; |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 1045 | ul_tbf = bts()->ul_tbf_by_tfi(tfi, trx_no(), ts_no); |
Daniel Willmann | 0d12a2f | 2014-07-10 17:44:07 +0200 | [diff] [blame] | 1046 | if (!ul_tbf) { |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 1047 | LOGP(DRLCMAC, LOGL_NOTICE, "PACKET RESSOURCE REQ unknown uplink TFI=%d\n", tfi); |
| 1048 | return; |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 1049 | } |
Daniel Willmann | 0d12a2f | 2014-07-10 17:44:07 +0200 | [diff] [blame] | 1050 | LOGP(DRLCMAC, LOGL_ERROR, |
| 1051 | "RX: [PCU <- BTS] %s FIXME: Packet resource request\n", |
| 1052 | tbf_name(ul_tbf)); |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 1053 | } |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 1054 | } |
| 1055 | |
Holger Hans Peter Freyther | cb5c49b | 2013-10-27 11:19:13 +0100 | [diff] [blame] | 1056 | 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] | 1057 | { |
| 1058 | struct gprs_rlcmac_sba *sba; |
| 1059 | |
| 1060 | sba = bts()->sba()->find(this, fn); |
| 1061 | if (!sba) { |
| 1062 | LOGP(DRLCMAC, LOGL_NOTICE, "MS send measurement " |
| 1063 | "in packet resource request of single " |
| 1064 | "block, but there is no resource request " |
Holger Hans Peter Freyther | 53a336f | 2013-10-27 12:47:48 +0100 | [diff] [blame] | 1065 | "scheduled! TLLI=0x%08x\n", report->TLLI); |
Holger Hans Peter Freyther | 750ca67 | 2013-10-27 11:16:20 +0100 | [diff] [blame] | 1066 | } else { |
Jacob Erlbeck | 1db67e0 | 2015-05-22 18:02:51 +0200 | [diff] [blame] | 1067 | GprsMs *ms = bts()->ms_store().get_ms(report->TLLI); |
| 1068 | if (!ms) |
| 1069 | LOGP(DRLCMAC, LOGL_NOTICE, "MS send measurement " |
| 1070 | "but TLLI 0x%08x is unknown\n", report->TLLI); |
| 1071 | else |
| 1072 | ms->set_ta(sba->ta); |
| 1073 | |
Holger Hans Peter Freyther | 750ca67 | 2013-10-27 11:16:20 +0100 | [diff] [blame] | 1074 | bts()->sba()->free_sba(sba); |
| 1075 | } |
Holger Hans Peter Freyther | cb5c49b | 2013-10-27 11:19:13 +0100 | [diff] [blame] | 1076 | gprs_rlcmac_meas_rep(report); |
Holger Hans Peter Freyther | 750ca67 | 2013-10-27 11:16:20 +0100 | [diff] [blame] | 1077 | } |
| 1078 | |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 1079 | /* Received Uplink RLC control block. */ |
| 1080 | int gprs_rlcmac_pdch::rcv_control_block( |
| 1081 | bitvec *rlc_block, uint32_t fn) |
| 1082 | { |
Holger Hans Peter Freyther | fcbc702 | 2013-10-26 17:38:37 +0200 | [diff] [blame] | 1083 | RlcMacUplink_t * ul_control_block = (RlcMacUplink_t *)talloc_zero(tall_pcu_ctx, RlcMacUplink_t); |
| 1084 | LOGP(DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ RX : Uplink Control Block +++++++++++++++++++++++++\n"); |
| 1085 | decode_gsm_rlcmac_uplink(rlc_block, ul_control_block); |
| 1086 | LOGPC(DCSN1, LOGL_NOTICE, "\n"); |
| 1087 | LOGP(DRLCMAC, LOGL_DEBUG, "------------------------- RX : Uplink Control Block -------------------------\n"); |
| 1088 | switch (ul_control_block->u.MESSAGE_TYPE) { |
| 1089 | case MT_PACKET_CONTROL_ACK: |
Holger Hans Peter Freyther | e1a075a | 2013-10-27 13:35:30 +0100 | [diff] [blame] | 1090 | 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] | 1091 | break; |
| 1092 | case MT_PACKET_DOWNLINK_ACK_NACK: |
Holger Hans Peter Freyther | 5da2014 | 2013-10-27 11:41:01 +0100 | [diff] [blame] | 1093 | 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] | 1094 | break; |
| 1095 | case MT_PACKET_RESOURCE_REQUEST: |
Holger Hans Peter Freyther | 7a34471 | 2013-10-27 11:37:53 +0100 | [diff] [blame] | 1096 | 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] | 1097 | break; |
| 1098 | case MT_PACKET_MEASUREMENT_REPORT: |
Holger Hans Peter Freyther | cb5c49b | 2013-10-27 11:19:13 +0100 | [diff] [blame] | 1099 | 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] | 1100 | break; |
Holger Hans Peter Freyther | c1ae226 | 2013-10-27 10:50:35 +0100 | [diff] [blame] | 1101 | case MT_PACKET_UPLINK_DUMMY_CONTROL_BLOCK: |
| 1102 | /* ignoring it. change the SI to not force sending these? */ |
| 1103 | break; |
Holger Hans Peter Freyther | fcbc702 | 2013-10-26 17:38:37 +0200 | [diff] [blame] | 1104 | default: |
Holger Hans Peter Freyther | 1587764 | 2013-10-27 09:50:15 +0100 | [diff] [blame] | 1105 | bts()->decode_error(); |
Holger Hans Peter Freyther | 180def9 | 2013-10-27 10:36:37 +0100 | [diff] [blame] | 1106 | LOGP(DRLCMAC, LOGL_NOTICE, |
| 1107 | "RX: [PCU <- BTS] unknown control block(%d) received\n", |
| 1108 | ul_control_block->u.MESSAGE_TYPE); |
Holger Hans Peter Freyther | fcbc702 | 2013-10-26 17:38:37 +0200 | [diff] [blame] | 1109 | } |
| 1110 | talloc_free(ul_control_block); |
| 1111 | return 1; |
| 1112 | } |
| 1113 | |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 1114 | |
Holger Hans Peter Freyther | 6f9f434 | 2013-10-26 16:54:10 +0200 | [diff] [blame] | 1115 | /* received RLC/MAC block from L1 */ |
Jacob Erlbeck | 20f6fd1 | 2015-06-08 11:05:45 +0200 | [diff] [blame] | 1116 | int gprs_rlcmac_pdch::rcv_block(uint8_t *data, uint8_t len, uint32_t fn, |
| 1117 | struct pcu_l1_meas *meas) |
Holger Hans Peter Freyther | 9ae367f | 2013-10-26 16:42:38 +0200 | [diff] [blame] | 1118 | { |
Holger Hans Peter Freyther | 6f9f434 | 2013-10-26 16:54:10 +0200 | [diff] [blame] | 1119 | unsigned payload = data[0] >> 6; |
Holger Hans Peter Freyther | 6f9f434 | 2013-10-26 16:54:10 +0200 | [diff] [blame] | 1120 | bitvec *block; |
| 1121 | int rc = 0; |
| 1122 | |
| 1123 | switch (payload) { |
| 1124 | case GPRS_RLCMAC_DATA_BLOCK: |
Jacob Erlbeck | 20f6fd1 | 2015-06-08 11:05:45 +0200 | [diff] [blame] | 1125 | rc = rcv_data_block_acknowledged(data, len, meas); |
Holger Hans Peter Freyther | 6f9f434 | 2013-10-26 16:54:10 +0200 | [diff] [blame] | 1126 | break; |
| 1127 | case GPRS_RLCMAC_CONTROL_BLOCK: |
| 1128 | block = bitvec_alloc(len); |
| 1129 | if (!block) |
| 1130 | return -ENOMEM; |
| 1131 | bitvec_unpack(block, data); |
Holger Hans Peter Freyther | 05f8efc | 2013-10-26 18:53:16 +0200 | [diff] [blame] | 1132 | rc = rcv_control_block(block, fn); |
Holger Hans Peter Freyther | 6f9f434 | 2013-10-26 16:54:10 +0200 | [diff] [blame] | 1133 | bitvec_free(block); |
| 1134 | break; |
| 1135 | case GPRS_RLCMAC_CONTROL_BLOCK_OPT: |
| 1136 | LOGP(DRLCMAC, LOGL_NOTICE, "GPRS_RLCMAC_CONTROL_BLOCK_OPT block payload is not supported.\n"); |
| 1137 | break; |
| 1138 | default: |
| 1139 | LOGP(DRLCMAC, LOGL_NOTICE, "Unknown RLCMAC block payload(%u).\n", payload); |
| 1140 | rc = -EINVAL; |
| 1141 | } |
| 1142 | |
| 1143 | return rc; |
Holger Hans Peter Freyther | 9ae367f | 2013-10-26 16:42:38 +0200 | [diff] [blame] | 1144 | } |
Daniel Willmann | 1e0c610 | 2014-06-04 14:56:09 +0200 | [diff] [blame] | 1145 | |
Daniel Willmann | 2207c5e | 2014-07-10 17:44:06 +0200 | [diff] [blame] | 1146 | gprs_rlcmac_tbf *gprs_rlcmac_pdch::tbf_from_list_by_tfi(struct llist_head *tbf_list, uint8_t tfi, |
| 1147 | enum gprs_rlcmac_tbf_direction dir) |
Daniel Willmann | 1e0c610 | 2014-06-04 14:56:09 +0200 | [diff] [blame] | 1148 | { |
Daniel Willmann | 17a1d5e | 2014-05-30 20:21:30 +0200 | [diff] [blame] | 1149 | gprs_rlcmac_tbf *tbf; |
Daniel Willmann | 1b3864f | 2014-07-30 13:25:19 +0200 | [diff] [blame] | 1150 | struct llist_pods *lpods; |
Daniel Willmann | 17a1d5e | 2014-05-30 20:21:30 +0200 | [diff] [blame] | 1151 | |
Daniel Willmann | 1b3864f | 2014-07-30 13:25:19 +0200 | [diff] [blame] | 1152 | llist_pods_for_each_entry(tbf, tbf_list, list, lpods) { |
Daniel Willmann | 17a1d5e | 2014-05-30 20:21:30 +0200 | [diff] [blame] | 1153 | if (tbf->tfi() != tfi) |
| 1154 | continue; |
| 1155 | if (!tbf->pdch[ts_no]) |
| 1156 | continue; |
| 1157 | return tbf; |
| 1158 | } |
| 1159 | return NULL; |
Daniel Willmann | 1e0c610 | 2014-06-04 14:56:09 +0200 | [diff] [blame] | 1160 | } |
| 1161 | |
Daniel Willmann | fe6e2e4 | 2014-07-10 17:44:06 +0200 | [diff] [blame] | 1162 | gprs_rlcmac_ul_tbf *gprs_rlcmac_pdch::ul_tbf_by_tfi(uint8_t tfi) |
Daniel Willmann | 1e0c610 | 2014-06-04 14:56:09 +0200 | [diff] [blame] | 1163 | { |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 1164 | return static_cast<gprs_rlcmac_ul_tbf *>( |
| 1165 | tbf_by_tfi(tfi, GPRS_RLCMAC_UL_TBF)); |
Daniel Willmann | 17a1d5e | 2014-05-30 20:21:30 +0200 | [diff] [blame] | 1166 | } |
| 1167 | |
Daniel Willmann | fe6e2e4 | 2014-07-10 17:44:06 +0200 | [diff] [blame] | 1168 | gprs_rlcmac_dl_tbf *gprs_rlcmac_pdch::dl_tbf_by_tfi(uint8_t tfi) |
Daniel Willmann | 17a1d5e | 2014-05-30 20:21:30 +0200 | [diff] [blame] | 1169 | { |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 1170 | return static_cast<gprs_rlcmac_dl_tbf *>( |
| 1171 | tbf_by_tfi(tfi, GPRS_RLCMAC_DL_TBF)); |
| 1172 | } |
| 1173 | |
| 1174 | /* lookup TBF Entity (by TFI) */ |
| 1175 | gprs_rlcmac_tbf *gprs_rlcmac_pdch::tbf_by_tfi(uint8_t tfi, |
| 1176 | enum gprs_rlcmac_tbf_direction dir) |
| 1177 | { |
| 1178 | struct gprs_rlcmac_tbf *tbf; |
| 1179 | |
| 1180 | if (tfi >= 32) |
| 1181 | return NULL; |
| 1182 | |
| 1183 | tbf = m_tbfs[dir][tfi]; |
| 1184 | |
| 1185 | if (!tbf) |
| 1186 | return NULL; |
| 1187 | |
| 1188 | if (tbf->state_is_not(GPRS_RLCMAC_RELEASING)) { |
| 1189 | return tbf; |
| 1190 | } |
| 1191 | |
| 1192 | return NULL; |
Daniel Willmann | 1e0c610 | 2014-06-04 14:56:09 +0200 | [diff] [blame] | 1193 | } |
Jacob Erlbeck | ccc34e4 | 2015-06-29 13:45:05 +0200 | [diff] [blame] | 1194 | |
| 1195 | void gprs_rlcmac_pdch::attach_tbf(gprs_rlcmac_tbf *tbf) |
| 1196 | { |
Jacob Erlbeck | cc9358f | 2015-06-30 14:10:13 +0200 | [diff] [blame] | 1197 | gprs_rlcmac_ul_tbf *ul_tbf; |
| 1198 | |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 1199 | if (m_tbfs[tbf->direction][tbf->tfi()]) |
| 1200 | LOGP(DRLCMAC, LOGL_ERROR, "PDCH(TS %d, TRX %d): " |
| 1201 | "%s has not been detached, overwriting it\n", |
| 1202 | ts_no, trx_no(), |
| 1203 | m_tbfs[tbf->direction][tbf->tfi()]->name()); |
| 1204 | |
Jacob Erlbeck | ccc34e4 | 2015-06-29 13:45:05 +0200 | [diff] [blame] | 1205 | m_num_tbfs[tbf->direction] += 1; |
Jacob Erlbeck | cc9358f | 2015-06-30 14:10:13 +0200 | [diff] [blame] | 1206 | if (tbf->direction == GPRS_RLCMAC_UL_TBF) { |
| 1207 | ul_tbf = static_cast<gprs_rlcmac_ul_tbf *>(tbf); |
| 1208 | m_assigned_usf |= 1 << ul_tbf->m_usf[ts_no]; |
| 1209 | } |
Jacob Erlbeck | 47a57f6 | 2015-07-08 12:53:16 +0200 | [diff] [blame] | 1210 | m_assigned_tfi[tbf->direction] |= 1UL << tbf->tfi(); |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 1211 | m_tbfs[tbf->direction][tbf->tfi()] = tbf; |
Jacob Erlbeck | cc9358f | 2015-06-30 14:10:13 +0200 | [diff] [blame] | 1212 | |
| 1213 | LOGP(DRLCMAC, LOGL_INFO, "PDCH(TS %d, TRX %d): Attaching %s, %d TBFs, " |
| 1214 | "USFs = %02x, TFIs = %08x.\n", |
| 1215 | ts_no, trx_no(), tbf->name(), m_num_tbfs[tbf->direction], |
Jacob Erlbeck | 47a57f6 | 2015-07-08 12:53:16 +0200 | [diff] [blame] | 1216 | m_assigned_usf, m_assigned_tfi[tbf->direction]); |
Jacob Erlbeck | ccc34e4 | 2015-06-29 13:45:05 +0200 | [diff] [blame] | 1217 | } |
| 1218 | |
| 1219 | void gprs_rlcmac_pdch::detach_tbf(gprs_rlcmac_tbf *tbf) |
| 1220 | { |
Jacob Erlbeck | cc9358f | 2015-06-30 14:10:13 +0200 | [diff] [blame] | 1221 | gprs_rlcmac_ul_tbf *ul_tbf; |
| 1222 | |
Jacob Erlbeck | ccc34e4 | 2015-06-29 13:45:05 +0200 | [diff] [blame] | 1223 | OSMO_ASSERT(m_num_tbfs[tbf->direction] > 0); |
| 1224 | |
| 1225 | m_num_tbfs[tbf->direction] -= 1; |
Jacob Erlbeck | cc9358f | 2015-06-30 14:10:13 +0200 | [diff] [blame] | 1226 | if (tbf->direction == GPRS_RLCMAC_UL_TBF) { |
| 1227 | ul_tbf = static_cast<gprs_rlcmac_ul_tbf *>(tbf); |
| 1228 | m_assigned_usf &= ~(1 << ul_tbf->m_usf[ts_no]); |
| 1229 | } |
Jacob Erlbeck | 47a57f6 | 2015-07-08 12:53:16 +0200 | [diff] [blame] | 1230 | m_assigned_tfi[tbf->direction] &= ~(1UL << tbf->tfi()); |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 1231 | m_tbfs[tbf->direction][tbf->tfi()] = NULL; |
Jacob Erlbeck | cc9358f | 2015-06-30 14:10:13 +0200 | [diff] [blame] | 1232 | |
| 1233 | LOGP(DRLCMAC, LOGL_INFO, "PDCH(TS %d, TRX %d): Detaching %s, %d TBFs, " |
| 1234 | "USFs = %02x, TFIs = %08x.\n", |
| 1235 | ts_no, trx_no(), tbf->name(), m_num_tbfs[tbf->direction], |
Jacob Erlbeck | 47a57f6 | 2015-07-08 12:53:16 +0200 | [diff] [blame] | 1236 | m_assigned_usf, m_assigned_tfi[tbf->direction]); |
Jacob Erlbeck | ccc34e4 | 2015-06-29 13:45:05 +0200 | [diff] [blame] | 1237 | } |
Jacob Erlbeck | 23f93a1 | 2015-06-30 08:52:54 +0200 | [diff] [blame] | 1238 | |
| 1239 | void gprs_rlcmac_pdch::reserve(enum gprs_rlcmac_tbf_direction dir) |
| 1240 | { |
| 1241 | m_num_reserved[dir] += 1; |
| 1242 | } |
| 1243 | |
| 1244 | void gprs_rlcmac_pdch::unreserve(enum gprs_rlcmac_tbf_direction dir) |
| 1245 | { |
| 1246 | OSMO_ASSERT(m_num_reserved[dir] > 0); |
| 1247 | m_num_reserved[dir] -= 1; |
| 1248 | } |
| 1249 | |
| 1250 | void gprs_rlcmac_trx::reserve_slots(enum gprs_rlcmac_tbf_direction dir, |
| 1251 | uint8_t slots) |
| 1252 | { |
| 1253 | unsigned i; |
| 1254 | for (i = 0; i < ARRAY_SIZE(pdch); i += 1) |
| 1255 | if (slots & (1 << i)) |
| 1256 | pdch[i].reserve(dir); |
| 1257 | } |
| 1258 | |
| 1259 | void gprs_rlcmac_trx::unreserve_slots(enum gprs_rlcmac_tbf_direction dir, |
| 1260 | uint8_t slots) |
| 1261 | { |
| 1262 | unsigned i; |
| 1263 | for (i = 0; i < ARRAY_SIZE(pdch); i += 1) |
| 1264 | if (slots & (1 << i)) |
| 1265 | pdch[i].unreserve(dir); |
| 1266 | } |