Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1 | /* Copied from tbf.cpp |
| 2 | * |
| 3 | * Copyright (C) 2012 Ivan Klyuchnikov |
| 4 | * Copyright (C) 2012 Andreas Eversberg <jolly@eversberg.eu> |
| 5 | * Copyright (C) 2013 by Holger Hans Peter Freyther |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License |
| 9 | * as published by the Free Software Foundation; either version 2 |
| 10 | * of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 20 | */ |
| 21 | |
| 22 | #include <bts.h> |
| 23 | #include <tbf.h> |
Pau Espin Pedrol | 9d1cdb1 | 2019-09-25 17:47:02 +0200 | [diff] [blame] | 24 | #include <tbf_dl.h> |
| 25 | #include <tbf_ul.h> |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 26 | #include <rlc.h> |
| 27 | #include <gprs_rlcmac.h> |
| 28 | #include <gprs_debug.h> |
| 29 | #include <gprs_bssgp_pcu.h> |
Jacob Erlbeck | d4ad731 | 2015-07-17 16:39:09 +0200 | [diff] [blame] | 30 | #include <gprs_codel.h> |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 31 | #include <decoding.h> |
Jacob Erlbeck | 3a3b6a7 | 2016-01-11 16:15:45 +0100 | [diff] [blame] | 32 | #include <encoding.h> |
Max | 1187a77 | 2018-01-26 13:31:42 +0100 | [diff] [blame] | 33 | #include <gprs_ms.h> |
| 34 | #include <gprs_ms_storage.h> |
| 35 | #include <llc.h> |
Jacob Erlbeck | 3bed5d1 | 2015-03-19 11:22:38 +0100 | [diff] [blame] | 36 | #include "pcu_utils.h" |
| 37 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 38 | extern "C" { |
| 39 | #include <osmocom/core/msgb.h> |
| 40 | #include <osmocom/core/talloc.h> |
Alexander Couzens | 95e3792 | 2016-05-21 22:33:27 +0200 | [diff] [blame] | 41 | #include <osmocom/gprs/gprs_bssgp_bss.h> |
Max | 1187a77 | 2018-01-26 13:31:42 +0100 | [diff] [blame] | 42 | #include <osmocom/core/bitvec.h> |
| 43 | #include <osmocom/core/linuxlist.h> |
| 44 | #include <osmocom/core/logging.h> |
| 45 | #include <osmocom/core/rate_ctr.h> |
| 46 | #include <osmocom/core/timer.h> |
| 47 | #include <osmocom/core/utils.h> |
| 48 | #include <osmocom/gsm/gsm_utils.h> |
| 49 | #include <osmocom/gsm/protocol/gsm_04_08.h> |
Max | 136ebcc | 2019-03-05 14:59:03 +0100 | [diff] [blame] | 50 | #include "coding_scheme.h" |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 51 | } |
| 52 | |
| 53 | #include <errno.h> |
| 54 | #include <string.h> |
| 55 | |
| 56 | /* After sending these frames, we poll for ack/nack. */ |
| 57 | #define POLL_ACK_AFTER_FRAMES 20 |
| 58 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 59 | static inline void tbf_update_ms_class(struct gprs_rlcmac_tbf *tbf, |
| 60 | const uint8_t ms_class) |
| 61 | { |
Jacob Erlbeck | befc760 | 2015-06-02 12:33:30 +0200 | [diff] [blame] | 62 | if (!tbf->ms_class() && ms_class) |
Pau Espin Pedrol | e9f77d3 | 2020-10-23 18:41:40 +0200 | [diff] [blame^] | 63 | tbf->ms()->set_ms_class(ms_class); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 64 | } |
| 65 | |
Jacob Erlbeck | d0261b7 | 2015-04-02 13:58:09 +0200 | [diff] [blame] | 66 | static void llc_timer_cb(void *_tbf) |
| 67 | { |
| 68 | struct gprs_rlcmac_dl_tbf *tbf = (struct gprs_rlcmac_dl_tbf *)_tbf; |
| 69 | |
| 70 | if (tbf->state_is_not(GPRS_RLCMAC_FLOW)) |
| 71 | return; |
| 72 | |
Max | c21f007 | 2017-12-15 17:36:45 +0100 | [diff] [blame] | 73 | LOGPTBFDL(tbf, LOGL_DEBUG, "LLC receive timeout, requesting DL ACK\n"); |
Jacob Erlbeck | d0261b7 | 2015-04-02 13:58:09 +0200 | [diff] [blame] | 74 | |
| 75 | tbf->request_dl_ack(); |
| 76 | } |
| 77 | |
Pau Espin Pedrol | 834cbab | 2020-10-23 22:17:01 +0200 | [diff] [blame] | 78 | gprs_rlcmac_dl_tbf::BandWidth::BandWidth() : |
| 79 | dl_bw_octets(0), |
| 80 | dl_throughput(0), |
| 81 | dl_loss_lost(0), |
| 82 | dl_loss_received(0) |
| 83 | { |
| 84 | timespecclear(&dl_bw_tv); |
| 85 | timespecclear(&dl_loss_tv); |
| 86 | } |
| 87 | |
Pau Espin Pedrol | e9f77d3 | 2020-10-23 18:41:40 +0200 | [diff] [blame^] | 88 | gprs_rlcmac_dl_tbf::gprs_rlcmac_dl_tbf(BTS *bts_, GprsMs *ms) : |
| 89 | gprs_rlcmac_tbf(bts_, ms, GPRS_RLCMAC_DL_TBF), |
Pau Espin Pedrol | bddf1ad | 2019-09-26 14:41:18 +0200 | [diff] [blame] | 90 | m_tx_counter(0), |
| 91 | m_wait_confirm(0), |
| 92 | m_dl_ack_requested(false), |
| 93 | m_last_dl_poll_fn(0), |
| 94 | m_last_dl_drained_fn(0), |
| 95 | m_dl_gprs_ctrs(NULL), |
| 96 | m_dl_egprs_ctrs(NULL) |
| 97 | { |
| 98 | memset(&m_llc_timer, 0, sizeof(m_llc_timer)); |
Pau Espin Pedrol | ad586a9 | 2019-09-26 14:42:41 +0200 | [diff] [blame] | 99 | osmo_timer_setup(&m_llc_timer, llc_timer_cb, this); |
Pau Espin Pedrol | bddf1ad | 2019-09-26 14:41:18 +0200 | [diff] [blame] | 100 | } |
| 101 | |
Jacob Erlbeck | d0261b7 | 2015-04-02 13:58:09 +0200 | [diff] [blame] | 102 | void gprs_rlcmac_dl_tbf::cleanup() |
| 103 | { |
| 104 | osmo_timer_del(&m_llc_timer); |
| 105 | } |
| 106 | |
| 107 | void gprs_rlcmac_dl_tbf::start_llc_timer() |
| 108 | { |
| 109 | if (bts_data()->llc_idle_ack_csec > 0) { |
Pau Espin Pedrol | 1de6873 | 2020-03-11 14:04:52 +0100 | [diff] [blame] | 110 | struct timespec tv; |
| 111 | csecs_to_timespec(bts_data()->llc_idle_ack_csec, &tv); |
| 112 | osmo_timer_schedule(&m_llc_timer, tv.tv_sec, tv.tv_nsec / 1000); |
Jacob Erlbeck | d0261b7 | 2015-04-02 13:58:09 +0200 | [diff] [blame] | 113 | } |
| 114 | } |
| 115 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 116 | int gprs_rlcmac_dl_tbf::append_data(const uint8_t ms_class, |
| 117 | const uint16_t pdu_delay_csec, |
| 118 | const uint8_t *data, const uint16_t len) |
| 119 | { |
Pau Espin Pedrol | 1de6873 | 2020-03-11 14:04:52 +0100 | [diff] [blame] | 120 | struct timespec expire_time; |
Pau Espin Pedrol | 5fc6e01 | 2020-02-26 20:05:33 +0100 | [diff] [blame] | 121 | |
Max | c21f007 | 2017-12-15 17:36:45 +0100 | [diff] [blame] | 122 | LOGPTBFDL(this, LOGL_DEBUG, "appending %u bytes\n", len); |
Pau Espin Pedrol | 5fc6e01 | 2020-02-26 20:05:33 +0100 | [diff] [blame] | 123 | |
Jacob Erlbeck | b671dbf | 2015-06-15 14:32:33 +0200 | [diff] [blame] | 124 | struct msgb *llc_msg = msgb_alloc(len, "llc_pdu_queue"); |
Jacob Erlbeck | 409efa1 | 2015-06-12 14:06:09 +0200 | [diff] [blame] | 125 | if (!llc_msg) |
| 126 | return -ENOMEM; |
Jacob Erlbeck | b671dbf | 2015-06-15 14:32:33 +0200 | [diff] [blame] | 127 | |
Pau Espin Pedrol | 5fc6e01 | 2020-02-26 20:05:33 +0100 | [diff] [blame] | 128 | gprs_llc_queue::calc_pdu_lifetime(bts, pdu_delay_csec, &expire_time); |
Jacob Erlbeck | 409efa1 | 2015-06-12 14:06:09 +0200 | [diff] [blame] | 129 | memcpy(msgb_put(llc_msg, len), data, len); |
Pau Espin Pedrol | 5fc6e01 | 2020-02-26 20:05:33 +0100 | [diff] [blame] | 130 | llc_queue()->enqueue(llc_msg, &expire_time); |
Jacob Erlbeck | 409efa1 | 2015-06-12 14:06:09 +0200 | [diff] [blame] | 131 | tbf_update_ms_class(this, ms_class); |
| 132 | start_llc_timer(); |
| 133 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 134 | if (state_is(GPRS_RLCMAC_WAIT_RELEASE)) { |
Max | c21f007 | 2017-12-15 17:36:45 +0100 | [diff] [blame] | 135 | LOGPTBFDL(this, LOGL_DEBUG, "in WAIT RELEASE state (T3193), so reuse TBF\n"); |
Jacob Erlbeck | 91ff7d1 | 2015-09-01 11:20:29 +0200 | [diff] [blame] | 136 | establish_dl_tbf_on_pacch(); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 137 | } |
| 138 | |
| 139 | return 0; |
| 140 | } |
| 141 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 142 | static int tbf_new_dl_assignment(struct gprs_rlcmac_bts *bts, |
| 143 | const char *imsi, |
Jacob Erlbeck | 9399046 | 2015-05-15 15:50:43 +0200 | [diff] [blame] | 144 | const uint32_t tlli, const uint32_t tlli_old, |
| 145 | const uint8_t ms_class, |
Jacob Erlbeck | 86b6f05 | 2015-11-27 15:17:34 +0100 | [diff] [blame] | 146 | const uint8_t egprs_ms_class, |
Jacob Erlbeck | 409efa1 | 2015-06-12 14:06:09 +0200 | [diff] [blame] | 147 | struct gprs_rlcmac_dl_tbf **tbf) |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 148 | { |
Max | e9fe0e3 | 2017-09-28 15:56:05 +0200 | [diff] [blame] | 149 | bool ss; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 150 | int8_t use_trx; |
Pau Espin Pedrol | 26743ac | 2020-07-07 17:18:10 +0200 | [diff] [blame] | 151 | uint8_t ta = GSM48_TA_INVALID; |
Jacob Erlbeck | e43460b | 2015-05-13 13:33:12 +0200 | [diff] [blame] | 152 | struct gprs_rlcmac_ul_tbf *ul_tbf = NULL, *old_ul_tbf; |
Jacob Erlbeck | 90de3a7 | 2015-04-09 19:18:59 +0200 | [diff] [blame] | 153 | struct gprs_rlcmac_dl_tbf *dl_tbf = NULL; |
Jacob Erlbeck | e43460b | 2015-05-13 13:33:12 +0200 | [diff] [blame] | 154 | GprsMs *ms; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 155 | |
| 156 | /* check for uplink data, so we copy our informations */ |
Jacob Erlbeck | 9399046 | 2015-05-15 15:50:43 +0200 | [diff] [blame] | 157 | ms = bts->bts->ms_store().get_ms(tlli, tlli_old, imsi); |
Pau Espin Pedrol | 322456e | 2020-05-08 18:15:59 +0200 | [diff] [blame] | 158 | if (!ms) |
| 159 | ms = bts->bts->ms_alloc(ms_class, egprs_ms_class); /* ms class updated later */ |
| 160 | |
| 161 | ul_tbf = ms->ul_tbf(); |
| 162 | ta = ms->ta(); |
| 163 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 164 | if (ul_tbf && ul_tbf->m_contention_resolution_done |
| 165 | && !ul_tbf->m_final_ack_sent) { |
| 166 | use_trx = ul_tbf->trx->trx_no; |
Max | e9fe0e3 | 2017-09-28 15:56:05 +0200 | [diff] [blame] | 167 | ss = false; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 168 | old_ul_tbf = ul_tbf; |
| 169 | } else { |
| 170 | use_trx = -1; |
Max | e9fe0e3 | 2017-09-28 15:56:05 +0200 | [diff] [blame] | 171 | ss = true; /* PCH assignment only allows one timeslot */ |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 172 | old_ul_tbf = NULL; |
| 173 | } |
| 174 | |
| 175 | // Create new TBF (any TRX) |
Max | 5a6bcfb | 2017-09-01 14:36:44 +0200 | [diff] [blame] | 176 | /* FIXME: Copy and paste with alloc_ul_tbf */ |
Jacob Erlbeck | 5879c64 | 2015-07-10 10:41:36 +0200 | [diff] [blame] | 177 | /* set number of downlink slots according to multislot class */ |
Pau Espin Pedrol | 322456e | 2020-05-08 18:15:59 +0200 | [diff] [blame] | 178 | dl_tbf = tbf_alloc_dl_tbf(bts, ms, use_trx, ss); |
Jacob Erlbeck | 90de3a7 | 2015-04-09 19:18:59 +0200 | [diff] [blame] | 179 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 180 | if (!dl_tbf) { |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 181 | LOGP(DTBF, LOGL_NOTICE, "No PDCH resource\n"); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 182 | return -EBUSY; |
| 183 | } |
Jacob Erlbeck | be0cbc1 | 2015-05-18 14:35:11 +0200 | [diff] [blame] | 184 | dl_tbf->update_ms(tlli, GPRS_RLCMAC_DL_TBF); |
Jacob Erlbeck | 9200ce6 | 2015-05-22 17:48:04 +0200 | [diff] [blame] | 185 | dl_tbf->ms()->set_ta(ta); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 186 | |
Max | c21f007 | 2017-12-15 17:36:45 +0100 | [diff] [blame] | 187 | LOGPTBFDL(dl_tbf, LOGL_DEBUG, "[DOWNLINK] START\n"); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 188 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 189 | /* Store IMSI for later look-up and PCH retransmission */ |
| 190 | dl_tbf->assign_imsi(imsi); |
| 191 | |
| 192 | /* trigger downlink assignment and set state to ASSIGN. |
| 193 | * we don't use old_downlink, so the possible uplink is used |
| 194 | * to trigger downlink assignment. if there is no uplink, |
| 195 | * AGCH is used. */ |
Max | a10c398 | 2017-07-07 18:25:41 +0200 | [diff] [blame] | 196 | dl_tbf->trigger_ass(old_ul_tbf); |
Jacob Erlbeck | 409efa1 | 2015-06-12 14:06:09 +0200 | [diff] [blame] | 197 | *tbf = dl_tbf; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 198 | return 0; |
| 199 | } |
| 200 | |
| 201 | /** |
| 202 | * TODO: split into unit test-able parts... |
| 203 | */ |
| 204 | int gprs_rlcmac_dl_tbf::handle(struct gprs_rlcmac_bts *bts, |
Jacob Erlbeck | 9399046 | 2015-05-15 15:50:43 +0200 | [diff] [blame] | 205 | const uint32_t tlli, const uint32_t tlli_old, const char *imsi, |
Jacob Erlbeck | f4bb424 | 2016-01-20 13:30:34 +0100 | [diff] [blame] | 206 | uint8_t ms_class, uint8_t egprs_ms_class, |
Jacob Erlbeck | 14e00f8 | 2015-11-27 18:10:39 +0100 | [diff] [blame] | 207 | const uint16_t delay_csec, |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 208 | const uint8_t *data, const uint16_t len) |
| 209 | { |
Jacob Erlbeck | ac28905 | 2015-08-14 12:50:54 +0200 | [diff] [blame] | 210 | struct gprs_rlcmac_dl_tbf *dl_tbf = NULL; |
Jacob Erlbeck | 409efa1 | 2015-06-12 14:06:09 +0200 | [diff] [blame] | 211 | int rc; |
Jacob Erlbeck | ac28905 | 2015-08-14 12:50:54 +0200 | [diff] [blame] | 212 | GprsMs *ms, *ms_old; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 213 | |
| 214 | /* check for existing TBF */ |
Jacob Erlbeck | ac28905 | 2015-08-14 12:50:54 +0200 | [diff] [blame] | 215 | ms = bts->bts->ms_store().get_ms(tlli, tlli_old, imsi); |
Jacob Erlbeck | f4bb424 | 2016-01-20 13:30:34 +0100 | [diff] [blame] | 216 | if (ms) { |
Jacob Erlbeck | ac28905 | 2015-08-14 12:50:54 +0200 | [diff] [blame] | 217 | dl_tbf = ms->dl_tbf(); |
| 218 | |
Jacob Erlbeck | f4bb424 | 2016-01-20 13:30:34 +0100 | [diff] [blame] | 219 | /* If we known the GPRS/EGPRS MS class, use it */ |
| 220 | if (ms->ms_class() || ms->egprs_ms_class()) { |
| 221 | ms_class = ms->ms_class(); |
| 222 | egprs_ms_class = ms->egprs_ms_class(); |
| 223 | } |
| 224 | } |
Jacob Erlbeck | a47aaa4 | 2016-01-07 16:47:34 +0100 | [diff] [blame] | 225 | |
Jacob Erlbeck | ac28905 | 2015-08-14 12:50:54 +0200 | [diff] [blame] | 226 | if (ms && strlen(ms->imsi()) == 0) { |
| 227 | ms_old = bts->bts->ms_store().get_ms(0, 0, imsi); |
| 228 | if (ms_old && ms_old != ms) { |
| 229 | /* The TLLI has changed (RAU), so there are two MS |
| 230 | * objects for the same MS */ |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 231 | LOGP(DTBF, LOGL_NOTICE, |
| 232 | "There is a new MS object for the same MS: (0x%08x, '%s') -> (0x%08x, '%s')\n", |
| 233 | ms_old->tlli(), ms_old->imsi(), ms->tlli(), ms->imsi()); |
Jacob Erlbeck | ac28905 | 2015-08-14 12:50:54 +0200 | [diff] [blame] | 234 | |
| 235 | GprsMs::Guard guard_old(ms_old); |
| 236 | |
| 237 | if (!dl_tbf && ms_old->dl_tbf()) { |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 238 | LOGP(DTBF, LOGL_NOTICE, |
| 239 | "IMSI %s, old TBF %s: moving DL TBF to new MS object\n", |
| 240 | imsi, ms_old->dl_tbf()->name()); |
Jacob Erlbeck | ac28905 | 2015-08-14 12:50:54 +0200 | [diff] [blame] | 241 | dl_tbf = ms_old->dl_tbf(); |
| 242 | /* Move the DL TBF to the new MS */ |
| 243 | dl_tbf->set_ms(ms); |
| 244 | } |
| 245 | /* Clean up the old MS object */ |
| 246 | /* TODO: Put this into a separate function, use timer? */ |
Max | ee5be3a | 2017-12-20 17:31:13 +0100 | [diff] [blame] | 247 | if (ms_old->ul_tbf() && !ms_old->ul_tbf()->timers_pending(T_MAX)) |
Jacob Erlbeck | ac28905 | 2015-08-14 12:50:54 +0200 | [diff] [blame] | 248 | tbf_free(ms_old->ul_tbf()); |
Max | ee5be3a | 2017-12-20 17:31:13 +0100 | [diff] [blame] | 249 | if (ms_old->dl_tbf() && !ms_old->dl_tbf()->timers_pending(T_MAX)) |
Jacob Erlbeck | ac28905 | 2015-08-14 12:50:54 +0200 | [diff] [blame] | 250 | tbf_free(ms_old->dl_tbf()); |
| 251 | |
Jacob Erlbeck | 2b349b5 | 2015-08-18 11:55:03 +0200 | [diff] [blame] | 252 | ms->merge_old_ms(ms_old); |
Jacob Erlbeck | ac28905 | 2015-08-14 12:50:54 +0200 | [diff] [blame] | 253 | } |
| 254 | } |
| 255 | |
Jacob Erlbeck | 409efa1 | 2015-06-12 14:06:09 +0200 | [diff] [blame] | 256 | if (!dl_tbf) { |
Jacob Erlbeck | 86b6f05 | 2015-11-27 15:17:34 +0100 | [diff] [blame] | 257 | rc = tbf_new_dl_assignment(bts, imsi, tlli, tlli_old, |
Jacob Erlbeck | 14e00f8 | 2015-11-27 18:10:39 +0100 | [diff] [blame] | 258 | ms_class, egprs_ms_class, &dl_tbf); |
Jacob Erlbeck | 409efa1 | 2015-06-12 14:06:09 +0200 | [diff] [blame] | 259 | if (rc < 0) |
| 260 | return rc; |
| 261 | } |
Jacob Erlbeck | 9399046 | 2015-05-15 15:50:43 +0200 | [diff] [blame] | 262 | |
Jacob Erlbeck | 14e00f8 | 2015-11-27 18:10:39 +0100 | [diff] [blame] | 263 | /* TODO: ms_class vs. egprs_ms_class is not handled here */ |
Jacob Erlbeck | 409efa1 | 2015-06-12 14:06:09 +0200 | [diff] [blame] | 264 | rc = dl_tbf->append_data(ms_class, delay_csec, data, len); |
Jacob Erlbeck | af9a39d | 2015-08-16 21:27:34 +0200 | [diff] [blame] | 265 | dl_tbf->update_ms(tlli, GPRS_RLCMAC_DL_TBF); |
Jacob Erlbeck | ac28905 | 2015-08-14 12:50:54 +0200 | [diff] [blame] | 266 | dl_tbf->assign_imsi(imsi); |
Jacob Erlbeck | 409efa1 | 2015-06-12 14:06:09 +0200 | [diff] [blame] | 267 | |
| 268 | return rc; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 269 | } |
| 270 | |
| 271 | struct msgb *gprs_rlcmac_dl_tbf::llc_dequeue(bssgp_bvc_ctx *bctx) |
| 272 | { |
| 273 | struct msgb *msg; |
Pau Espin Pedrol | 1de6873 | 2020-03-11 14:04:52 +0100 | [diff] [blame] | 274 | struct timespec tv_now, tv_now2; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 275 | uint32_t octets = 0, frames = 0; |
Pau Espin Pedrol | 1de6873 | 2020-03-11 14:04:52 +0100 | [diff] [blame] | 276 | struct timespec hyst_delta = {0, 0}; |
Jacob Erlbeck | 0c1c877 | 2015-03-20 12:02:42 +0100 | [diff] [blame] | 277 | const unsigned keep_small_thresh = 60; |
Jacob Erlbeck | b671dbf | 2015-06-15 14:32:33 +0200 | [diff] [blame] | 278 | const gprs_llc_queue::MetaInfo *info; |
Jacob Erlbeck | 0c1c877 | 2015-03-20 12:02:42 +0100 | [diff] [blame] | 279 | |
| 280 | if (bts_data()->llc_discard_csec) |
Pau Espin Pedrol | 1de6873 | 2020-03-11 14:04:52 +0100 | [diff] [blame] | 281 | csecs_to_timespec(bts_data()->llc_discard_csec, &hyst_delta); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 282 | |
Pau Espin Pedrol | 1de6873 | 2020-03-11 14:04:52 +0100 | [diff] [blame] | 283 | osmo_clock_gettime(CLOCK_MONOTONIC, &tv_now); |
| 284 | timespecadd(&tv_now, &hyst_delta, &tv_now2); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 285 | |
Jacob Erlbeck | b671dbf | 2015-06-15 14:32:33 +0200 | [diff] [blame] | 286 | while ((msg = llc_queue()->dequeue(&info))) { |
Pau Espin Pedrol | 1de6873 | 2020-03-11 14:04:52 +0100 | [diff] [blame] | 287 | const struct timespec *tv_disc = &info->expire_time; |
| 288 | const struct timespec *tv_recv = &info->recv_time; |
Jacob Erlbeck | 6e4ccec | 2015-05-06 14:24:36 +0200 | [diff] [blame] | 289 | |
| 290 | gprs_bssgp_update_queue_delay(tv_recv, &tv_now); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 291 | |
Jacob Erlbeck | d4ad731 | 2015-07-17 16:39:09 +0200 | [diff] [blame] | 292 | if (ms() && ms()->codel_state()) { |
| 293 | int bytes = llc_queue()->octets(); |
| 294 | if (gprs_codel_control(ms()->codel_state(), |
| 295 | tv_recv, &tv_now, bytes)) |
| 296 | goto drop_frame; |
| 297 | } |
| 298 | |
Jacob Erlbeck | 0c1c877 | 2015-03-20 12:02:42 +0100 | [diff] [blame] | 299 | /* Is the age below the low water mark? */ |
Jacob Erlbeck | 6dbe822 | 2015-05-29 10:37:09 +0200 | [diff] [blame] | 300 | if (!gprs_llc_queue::is_frame_expired(&tv_now2, tv_disc)) |
Jacob Erlbeck | 0c1c877 | 2015-03-20 12:02:42 +0100 | [diff] [blame] | 301 | break; |
| 302 | |
| 303 | /* Is the age below the high water mark */ |
Jacob Erlbeck | 6dbe822 | 2015-05-29 10:37:09 +0200 | [diff] [blame] | 304 | if (!gprs_llc_queue::is_frame_expired(&tv_now, tv_disc)) { |
Jacob Erlbeck | 0c1c877 | 2015-03-20 12:02:42 +0100 | [diff] [blame] | 305 | /* Has the previous message not been dropped? */ |
| 306 | if (frames == 0) |
| 307 | break; |
| 308 | |
| 309 | /* Hysteresis mode, try to discard LLC messages until |
| 310 | * the low water mark has been reached */ |
| 311 | |
| 312 | /* Check whether to abort the hysteresis mode */ |
| 313 | |
| 314 | /* Is the frame small, perhaps only a TCP ACK? */ |
| 315 | if (msg->len <= keep_small_thresh) |
| 316 | break; |
| 317 | |
| 318 | /* Is it a GMM message? */ |
| 319 | if (!gprs_llc::is_user_data_frame(msg->data, msg->len)) |
| 320 | break; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 321 | } |
Jacob Erlbeck | 0c1c877 | 2015-03-20 12:02:42 +0100 | [diff] [blame] | 322 | |
Pau Espin Pedrol | 2338e53 | 2020-05-12 20:54:35 +0200 | [diff] [blame] | 323 | bts->do_rate_ctr_inc(CTR_LLC_FRAME_TIMEDOUT); |
Jacob Erlbeck | d4ad731 | 2015-07-17 16:39:09 +0200 | [diff] [blame] | 324 | drop_frame: |
Jacob Erlbeck | 0c1c877 | 2015-03-20 12:02:42 +0100 | [diff] [blame] | 325 | frames++; |
| 326 | octets += msg->len; |
| 327 | msgb_free(msg); |
Pau Espin Pedrol | 2338e53 | 2020-05-12 20:54:35 +0200 | [diff] [blame] | 328 | bts->do_rate_ctr_inc(CTR_LLC_FRAME_DROPPED); |
Jacob Erlbeck | 0c1c877 | 2015-03-20 12:02:42 +0100 | [diff] [blame] | 329 | continue; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 330 | } |
| 331 | |
| 332 | if (frames) { |
Max | c21f007 | 2017-12-15 17:36:45 +0100 | [diff] [blame] | 333 | LOGPTBFDL(this, LOGL_NOTICE, "Discarding LLC PDU " |
Jacob Erlbeck | 0c1c877 | 2015-03-20 12:02:42 +0100 | [diff] [blame] | 334 | "because lifetime limit reached, " |
| 335 | "count=%u new_queue_size=%zu\n", |
Max | c21f007 | 2017-12-15 17:36:45 +0100 | [diff] [blame] | 336 | frames, llc_queue_size()); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 337 | if (frames > 0xff) |
| 338 | frames = 0xff; |
| 339 | if (octets > 0xffffff) |
| 340 | octets = 0xffffff; |
Jacob Erlbeck | 6e013a1 | 2015-08-21 15:10:23 +0200 | [diff] [blame] | 341 | if (bctx) |
| 342 | bssgp_tx_llc_discarded(bctx, tlli(), frames, octets); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 343 | } |
| 344 | |
| 345 | return msg; |
| 346 | } |
| 347 | |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 348 | bool gprs_rlcmac_dl_tbf::restart_bsn_cycle() |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 349 | { |
Jacob Erlbeck | 9534024 | 2015-03-19 13:22:07 +0100 | [diff] [blame] | 350 | /* If V(S) == V(A) and finished state, we would have received |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 351 | * acknowledgement of all transmitted block. In this case we would |
| 352 | * have transmitted the final block, and received ack from MS. But in |
| 353 | * this case we did not receive the final ack indication from MS. This |
| 354 | * should never happen if MS works correctly. |
| 355 | */ |
Jacob Erlbeck | 9534024 | 2015-03-19 13:22:07 +0100 | [diff] [blame] | 356 | if (m_window.window_empty()) { |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 357 | LOGPTBFDL(this, LOGL_DEBUG, "MS acked all blocks\n"); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 358 | return false; |
Jacob Erlbeck | 9534024 | 2015-03-19 13:22:07 +0100 | [diff] [blame] | 359 | } |
| 360 | |
| 361 | /* cycle through all unacked blocks */ |
| 362 | int resend = m_window.mark_for_resend(); |
| 363 | |
| 364 | /* At this point there should be at least one unacked block |
| 365 | * to be resent. If not, this is an software error. */ |
| 366 | if (resend == 0) { |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 367 | LOGPTBFDL(this, LOGL_ERROR, |
| 368 | "FIXME: Software error: There are no unacknowledged blocks, but V(A) != V(S). PLEASE FIX!\n"); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 369 | return false; |
Jacob Erlbeck | 9534024 | 2015-03-19 13:22:07 +0100 | [diff] [blame] | 370 | } |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 371 | |
| 372 | return true; |
| 373 | } |
| 374 | |
| 375 | int gprs_rlcmac_dl_tbf::take_next_bsn(uint32_t fn, |
Jacob Erlbeck | 64e7b83 | 2016-02-04 15:16:47 +0100 | [diff] [blame] | 376 | int previous_bsn, bool *may_combine) |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 377 | { |
| 378 | int bsn; |
Jacob Erlbeck | 64e7b83 | 2016-02-04 15:16:47 +0100 | [diff] [blame] | 379 | int data_len2, force_data_len = -1; |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 380 | enum CodingScheme force_cs = UNKNOWN; |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 381 | |
Alexander Couzens | e46d8dc | 2019-09-10 15:34:49 +0200 | [diff] [blame] | 382 | /* search for a nacked or resend marked bsn */ |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 383 | bsn = m_window.resend_needed(); |
| 384 | |
| 385 | if (previous_bsn >= 0) { |
Aravind Sirsikar | cf2152b | 2016-07-13 18:46:17 +0530 | [diff] [blame] | 386 | force_cs = m_rlc.block(previous_bsn)->cs_current_trans; |
Max | 8a8e0fb | 2019-03-25 16:32:50 +0100 | [diff] [blame] | 387 | if (!mcs_is_edge(force_cs)) |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 388 | return -1; |
Jacob Erlbeck | 64e7b83 | 2016-02-04 15:16:47 +0100 | [diff] [blame] | 389 | force_data_len = m_rlc.block(previous_bsn)->len; |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 390 | } |
| 391 | |
| 392 | if (bsn >= 0) { |
Alexander Couzens | e46d8dc | 2019-09-10 15:34:49 +0200 | [diff] [blame] | 393 | /* resend an unacked bsn or resend bsn. */ |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 394 | if (previous_bsn == bsn) |
| 395 | return -1; |
| 396 | |
| 397 | if (previous_bsn >= 0 && |
| 398 | m_window.mod_sns(bsn - previous_bsn) > RLC_EGPRS_MAX_BSN_DELTA) |
| 399 | return -1; |
| 400 | |
Aravind Sirsikar | cf2152b | 2016-07-13 18:46:17 +0530 | [diff] [blame] | 401 | if (is_egprs_enabled()) { |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 402 | /* Table 8.1.1.2 and Table 8.1.1.1 of 44.060 */ |
Max | 902e3e5 | 2019-03-25 16:38:53 +0100 | [diff] [blame] | 403 | m_rlc.block(bsn)->cs_current_trans = get_retx_mcs(m_rlc.block(bsn)->cs_init, |
| 404 | ms()->current_cs_dl(), |
| 405 | !bts->bts_data()->dl_arq_type); |
Aravind Sirsikar | cf2152b | 2016-07-13 18:46:17 +0530 | [diff] [blame] | 406 | |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 407 | LOGPTBFDL(this, LOGL_DEBUG, |
Max | a035354 | 2019-03-06 18:03:58 +0100 | [diff] [blame] | 408 | "initial_cs_dl(%s) last_mcs(%s) demanded_mcs(%s) cs_trans(%s) arq_type(%d) bsn(%d)\n", |
| 409 | mcs_name(m_rlc.block(bsn)->cs_init), |
| 410 | mcs_name(m_rlc.block(bsn)->cs_last), |
| 411 | mcs_name(ms()->current_cs_dl()), |
| 412 | mcs_name(m_rlc.block(bsn)->cs_current_trans), |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 413 | bts->bts_data()->dl_arq_type, bsn); |
Aravind Sirsikar | cf2152b | 2016-07-13 18:46:17 +0530 | [diff] [blame] | 414 | |
| 415 | /* TODO: Need to remove this check when MCS-8 -> MCS-6 |
| 416 | * transistion is handled. |
| 417 | * Refer commit be881c028fc4da00c4046ecd9296727975c206a3 |
| 418 | */ |
Max | bea2edb | 2019-03-06 17:04:59 +0100 | [diff] [blame] | 419 | if (m_rlc.block(bsn)->cs_init == MCS8) |
Aravind Sirsikar | cf2152b | 2016-07-13 18:46:17 +0530 | [diff] [blame] | 420 | m_rlc.block(bsn)->cs_current_trans = |
Max | bea2edb | 2019-03-06 17:04:59 +0100 | [diff] [blame] | 421 | MCS8; |
Alexander Couzens | e46d8dc | 2019-09-10 15:34:49 +0200 | [diff] [blame] | 422 | } else { |
| 423 | /* gprs */ |
Aravind Sirsikar | cf2152b | 2016-07-13 18:46:17 +0530 | [diff] [blame] | 424 | m_rlc.block(bsn)->cs_current_trans = |
| 425 | m_rlc.block(bsn)->cs_last; |
Alexander Couzens | e46d8dc | 2019-09-10 15:34:49 +0200 | [diff] [blame] | 426 | } |
Aravind Sirsikar | cf2152b | 2016-07-13 18:46:17 +0530 | [diff] [blame] | 427 | |
Jacob Erlbeck | 64e7b83 | 2016-02-04 15:16:47 +0100 | [diff] [blame] | 428 | data_len2 = m_rlc.block(bsn)->len; |
| 429 | if (force_data_len > 0 && force_data_len != data_len2) |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 430 | return -1; |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 431 | LOGPTBFDL(this, LOGL_DEBUG, "Resending BSN %d\n", bsn); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 432 | /* re-send block with negative aknowlegement */ |
| 433 | m_window.m_v_b.mark_unacked(bsn); |
Pau Espin Pedrol | 2338e53 | 2020-05-12 20:54:35 +0200 | [diff] [blame] | 434 | bts->do_rate_ctr_inc(CTR_RLC_RESENT); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 435 | } else if (state_is(GPRS_RLCMAC_FINISHED)) { |
Alexander Couzens | e46d8dc | 2019-09-10 15:34:49 +0200 | [diff] [blame] | 436 | /* If the TBF is in finished, we already sent all packages at least once. |
| 437 | * If any packages could have been sent (because of unacked) it should have |
| 438 | * been catched up by the upper if(bsn >= 0) */ |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 439 | LOGPTBFDL(this, LOGL_DEBUG, |
| 440 | "Restarting at BSN %d, because all blocks have been transmitted.\n", |
| 441 | m_window.v_a()); |
Pau Espin Pedrol | 2338e53 | 2020-05-12 20:54:35 +0200 | [diff] [blame] | 442 | bts->do_rate_ctr_inc(CTR_RLC_RESTARTED); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 443 | if (restart_bsn_cycle()) |
Jacob Erlbeck | 64e7b83 | 2016-02-04 15:16:47 +0100 | [diff] [blame] | 444 | return take_next_bsn(fn, previous_bsn, may_combine); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 445 | } else if (dl_window_stalled()) { |
Alexander Couzens | e46d8dc | 2019-09-10 15:34:49 +0200 | [diff] [blame] | 446 | /* There are no more packages to send, but the window is stalled. |
| 447 | * Restart the bsn_cycle to resend all unacked messages */ |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 448 | LOGPTBFDL(this, LOGL_NOTICE, |
| 449 | "Restarting at BSN %d, because the window is stalled.\n", |
| 450 | m_window.v_a()); |
Pau Espin Pedrol | 2338e53 | 2020-05-12 20:54:35 +0200 | [diff] [blame] | 451 | bts->do_rate_ctr_inc(CTR_RLC_STALLED); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 452 | if (restart_bsn_cycle()) |
Jacob Erlbeck | 64e7b83 | 2016-02-04 15:16:47 +0100 | [diff] [blame] | 453 | return take_next_bsn(fn, previous_bsn, may_combine); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 454 | } else if (have_data()) { |
Alexander Couzens | e46d8dc | 2019-09-10 15:34:49 +0200 | [diff] [blame] | 455 | /* The window has space left, generate new bsn */ |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 456 | enum CodingScheme new_cs; |
Aravind Sirsikar | cf2152b | 2016-07-13 18:46:17 +0530 | [diff] [blame] | 457 | new_cs = force_cs ? force_cs : current_cs(); |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 458 | LOGPTBFDL(this, LOGL_DEBUG, |
| 459 | "Sending new block at BSN %d, CS=%s\n", |
Max | 136ebcc | 2019-03-05 14:59:03 +0100 | [diff] [blame] | 460 | m_window.v_s(), mcs_name(new_cs)); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 461 | |
Aravind Sirsikar | cf2152b | 2016-07-13 18:46:17 +0530 | [diff] [blame] | 462 | bsn = create_new_bsn(fn, new_cs); |
Oliver Smith | 45fdc44 | 2019-09-05 15:12:20 +0200 | [diff] [blame] | 463 | } else if (bts->bts_data()->dl_tbf_preemptive_retransmission && !m_window.window_empty()) { |
Alexander Couzens | e46d8dc | 2019-09-10 15:34:49 +0200 | [diff] [blame] | 464 | /* The window contains unacked packages, but not acked. |
| 465 | * Mark unacked bsns as RESEND */ |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 466 | LOGPTBFDL(this, LOGL_DEBUG, |
| 467 | "Restarting at BSN %d, because all blocks have been transmitted (FLOW).\n", |
| 468 | m_window.v_a()); |
Pau Espin Pedrol | 2338e53 | 2020-05-12 20:54:35 +0200 | [diff] [blame] | 469 | bts->do_rate_ctr_inc(CTR_RLC_RESTARTED); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 470 | if (restart_bsn_cycle()) |
Jacob Erlbeck | 64e7b83 | 2016-02-04 15:16:47 +0100 | [diff] [blame] | 471 | return take_next_bsn(fn, previous_bsn, may_combine); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 472 | } else { |
| 473 | /* Nothing left to send, create dummy LLC commands */ |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 474 | LOGPTBFDL(this, LOGL_DEBUG, |
| 475 | "Sending new dummy block at BSN %d, CS=%s\n", |
Max | 136ebcc | 2019-03-05 14:59:03 +0100 | [diff] [blame] | 476 | m_window.v_s(), mcs_name(current_cs())); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 477 | bsn = create_new_bsn(fn, current_cs()); |
Aravind Sirsikar | cf2152b | 2016-07-13 18:46:17 +0530 | [diff] [blame] | 478 | /* Don't send a second block, so don't set cs_current_trans */ |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 479 | } |
| 480 | |
| 481 | if (bsn < 0) { |
| 482 | /* we just send final block again */ |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 483 | LOGPTBFDL(this, LOGL_DEBUG, |
| 484 | "Nothing else to send, Re-transmit final block!\n"); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 485 | bsn = m_window.v_s_mod(-1); |
Pau Espin Pedrol | 2338e53 | 2020-05-12 20:54:35 +0200 | [diff] [blame] | 486 | bts->do_rate_ctr_inc(CTR_RLC_FINAL_BLOCK_RESENT); |
| 487 | bts->do_rate_ctr_inc(CTR_RLC_RESENT); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 488 | } |
| 489 | |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 490 | *may_combine = num_data_blocks(mcs_header_type(m_rlc.block(bsn)->cs_current_trans)) > 1; |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 491 | |
| 492 | return bsn; |
| 493 | } |
| 494 | |
| 495 | /* |
| 496 | * Create DL data block |
| 497 | * The messages are fragmented and forwarded as data blocks. |
| 498 | */ |
| 499 | struct msgb *gprs_rlcmac_dl_tbf::create_dl_acked_block(uint32_t fn, uint8_t ts) |
| 500 | { |
| 501 | int bsn, bsn2 = -1; |
Jacob Erlbeck | 64e7b83 | 2016-02-04 15:16:47 +0100 | [diff] [blame] | 502 | bool may_combine; |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 503 | |
Max | c21f007 | 2017-12-15 17:36:45 +0100 | [diff] [blame] | 504 | LOGPTBFDL(this, LOGL_DEBUG, "downlink (V(A)==%d .. V(S)==%d)\n", |
| 505 | m_window.v_a(), m_window.v_s()); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 506 | |
Jacob Erlbeck | 64e7b83 | 2016-02-04 15:16:47 +0100 | [diff] [blame] | 507 | bsn = take_next_bsn(fn, -1, &may_combine); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 508 | if (bsn < 0) |
| 509 | return NULL; |
| 510 | |
Jacob Erlbeck | 64e7b83 | 2016-02-04 15:16:47 +0100 | [diff] [blame] | 511 | if (may_combine) |
| 512 | bsn2 = take_next_bsn(fn, bsn, &may_combine); |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 513 | |
| 514 | return create_dl_acked_block(fn, ts, bsn, bsn2); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 515 | } |
| 516 | |
Max | a10c398 | 2017-07-07 18:25:41 +0200 | [diff] [blame] | 517 | /* depending on the current TBF, we assign on PACCH or AGCH */ |
| 518 | void gprs_rlcmac_dl_tbf::trigger_ass(struct gprs_rlcmac_tbf *old_tbf) |
| 519 | { |
Pau Espin Pedrol | d7c3265 | 2019-12-23 12:41:34 +0100 | [diff] [blame] | 520 | uint16_t pgroup; |
Max | a10c398 | 2017-07-07 18:25:41 +0200 | [diff] [blame] | 521 | /* stop pending timer */ |
Max | ee5be3a | 2017-12-20 17:31:13 +0100 | [diff] [blame] | 522 | stop_timers("assignment (DL-TBF)"); |
Max | a10c398 | 2017-07-07 18:25:41 +0200 | [diff] [blame] | 523 | |
| 524 | /* check for downlink tbf: */ |
| 525 | if (old_tbf) { |
Max | c21f007 | 2017-12-15 17:36:45 +0100 | [diff] [blame] | 526 | LOGPTBFDL(this, LOGL_DEBUG, "Send dowlink assignment on PACCH, because %s exists\n", old_tbf->name()); |
Max | 0e59980 | 2018-01-23 20:09:06 +0100 | [diff] [blame] | 527 | TBF_SET_ASS_STATE_DL(old_tbf, GPRS_RLCMAC_DL_ASS_SEND_ASS); |
Max | a10c398 | 2017-07-07 18:25:41 +0200 | [diff] [blame] | 528 | old_tbf->was_releasing = old_tbf->state_is(GPRS_RLCMAC_WAIT_RELEASE); |
| 529 | |
| 530 | /* change state */ |
Max | 2399b1d | 2018-01-12 15:48:12 +0100 | [diff] [blame] | 531 | TBF_SET_ASS_ON(this, GPRS_RLCMAC_FLAG_PACCH, true); |
Max | a10c398 | 2017-07-07 18:25:41 +0200 | [diff] [blame] | 532 | |
| 533 | /* start timer */ |
Pau Espin Pedrol | 28f160e | 2019-09-05 14:48:35 +0200 | [diff] [blame] | 534 | T_START(this, T0, -2001, "assignment (PACCH)", true); |
Max | a10c398 | 2017-07-07 18:25:41 +0200 | [diff] [blame] | 535 | } else { |
Max | c21f007 | 2017-12-15 17:36:45 +0100 | [diff] [blame] | 536 | LOGPTBFDL(this, LOGL_DEBUG, "Send dowlink assignment on PCH, no TBF exist (IMSI=%s)\n", |
| 537 | imsi()); |
Max | a10c398 | 2017-07-07 18:25:41 +0200 | [diff] [blame] | 538 | was_releasing = state_is(GPRS_RLCMAC_WAIT_RELEASE); |
| 539 | |
| 540 | /* change state */ |
Max | 2399b1d | 2018-01-12 15:48:12 +0100 | [diff] [blame] | 541 | TBF_SET_ASS_ON(this, GPRS_RLCMAC_FLAG_CCCH, false); |
Max | a10c398 | 2017-07-07 18:25:41 +0200 | [diff] [blame] | 542 | |
| 543 | /* send immediate assignment */ |
Pau Espin Pedrol | d7c3265 | 2019-12-23 12:41:34 +0100 | [diff] [blame] | 544 | if ((pgroup = imsi2paging_group(imsi())) > 999) |
| 545 | LOGPTBFDL(this, LOGL_ERROR, "IMSI to paging group failed! (%s)\n", imsi()); |
| 546 | bts->snd_dl_ass(this, false, pgroup); |
Max | a10c398 | 2017-07-07 18:25:41 +0200 | [diff] [blame] | 547 | m_wait_confirm = 1; |
| 548 | } |
| 549 | } |
| 550 | |
Jacob Erlbeck | 409efa1 | 2015-06-12 14:06:09 +0200 | [diff] [blame] | 551 | void gprs_rlcmac_dl_tbf::schedule_next_frame() |
| 552 | { |
| 553 | struct msgb *msg; |
| 554 | |
| 555 | if (m_llc.frame_length() != 0) |
| 556 | return; |
| 557 | |
| 558 | /* dequeue next LLC frame, if any */ |
| 559 | msg = llc_dequeue(gprs_bssgp_pcu_current_bctx()); |
| 560 | if (!msg) |
| 561 | return; |
| 562 | |
Max | 0fdaa9d | 2018-01-30 16:03:10 +0100 | [diff] [blame] | 563 | LOGPTBFDL(this, LOGL_DEBUG, "Dequeue next LLC (len=%d)\n", msg->len); |
Jacob Erlbeck | 409efa1 | 2015-06-12 14:06:09 +0200 | [diff] [blame] | 564 | |
| 565 | m_llc.put_frame(msg->data, msg->len); |
Pau Espin Pedrol | 2338e53 | 2020-05-12 20:54:35 +0200 | [diff] [blame] | 566 | bts->do_rate_ctr_inc(CTR_LLC_FRAME_SCHED); |
Jacob Erlbeck | 409efa1 | 2015-06-12 14:06:09 +0200 | [diff] [blame] | 567 | msgb_free(msg); |
| 568 | m_last_dl_drained_fn = -1; |
| 569 | } |
| 570 | |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 571 | int gprs_rlcmac_dl_tbf::create_new_bsn(const uint32_t fn, enum CodingScheme cs) |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 572 | { |
Jacob Erlbeck | fec94d1 | 2016-01-12 17:02:49 +0100 | [diff] [blame] | 573 | uint8_t *data; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 574 | gprs_rlc_data *rlc_data; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 575 | const uint16_t bsn = m_window.v_s(); |
Jacob Erlbeck | 3a3b6a7 | 2016-01-11 16:15:45 +0100 | [diff] [blame] | 576 | gprs_rlc_data_block_info *rdbi; |
Jacob Erlbeck | fec94d1 | 2016-01-12 17:02:49 +0100 | [diff] [blame] | 577 | int num_chunks = 0; |
| 578 | int write_offset = 0; |
| 579 | Encoding::AppendResult ar; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 580 | |
Jacob Erlbeck | 409efa1 | 2015-06-12 14:06:09 +0200 | [diff] [blame] | 581 | if (m_llc.frame_length() == 0) |
| 582 | schedule_next_frame(); |
| 583 | |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 584 | OSMO_ASSERT(mcs_is_valid(cs)); |
Jacob Erlbeck | a700dd9 | 2015-06-02 16:00:41 +0200 | [diff] [blame] | 585 | |
Jacob Erlbeck | 3a3b6a7 | 2016-01-11 16:15:45 +0100 | [diff] [blame] | 586 | /* length of usable data block (single data unit w/o header) */ |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 587 | const uint8_t block_data_len = mcs_max_data_block_bytes(cs); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 588 | |
| 589 | /* now we still have untransmitted LLC data, so we fill mac block */ |
| 590 | rlc_data = m_rlc.block(bsn); |
Pau Espin Pedrol | 5bb87b8 | 2020-05-18 11:02:39 +0200 | [diff] [blame] | 591 | data = prepare(rlc_data, block_data_len); |
Aravind Sirsikar | 9149552 | 2016-07-12 14:17:12 +0530 | [diff] [blame] | 592 | rlc_data->cs_last = cs; |
Aravind Sirsikar | cf2152b | 2016-07-13 18:46:17 +0530 | [diff] [blame] | 593 | rlc_data->cs_current_trans = cs; |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 594 | |
| 595 | /* Initialise the variable related to DL SPB */ |
| 596 | rlc_data->spb_status.block_status_dl = EGPRS_RESEG_DL_DEFAULT; |
| 597 | rlc_data->cs_init = cs; |
| 598 | |
Jacob Erlbeck | 3a3b6a7 | 2016-01-11 16:15:45 +0100 | [diff] [blame] | 599 | rlc_data->len = block_data_len; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 600 | |
Jacob Erlbeck | 3a3b6a7 | 2016-01-11 16:15:45 +0100 | [diff] [blame] | 601 | rdbi = &(rlc_data->block_info); |
| 602 | memset(rdbi, 0, sizeof(*rdbi)); |
| 603 | rdbi->data_len = block_data_len; |
| 604 | |
| 605 | rdbi->cv = 15; /* Final Block Indicator, set late, if true */ |
| 606 | rdbi->bsn = bsn; /* Block Sequence Number */ |
| 607 | rdbi->e = 1; /* Extension bit, maybe set later (1: no extension) */ |
| 608 | |
Jacob Erlbeck | fec94d1 | 2016-01-12 17:02:49 +0100 | [diff] [blame] | 609 | do { |
| 610 | bool is_final; |
Alexander Couzens | 7fdbf89 | 2016-05-21 19:45:23 +0200 | [diff] [blame] | 611 | int payload_written = 0; |
Jacob Erlbeck | fec94d1 | 2016-01-12 17:02:49 +0100 | [diff] [blame] | 612 | |
Jacob Erlbeck | cbb1e70 | 2015-03-25 12:21:55 +0100 | [diff] [blame] | 613 | if (m_llc.frame_length() == 0) { |
Alexander Couzens | 1a50661 | 2016-05-24 16:55:30 +0200 | [diff] [blame] | 614 | /* nothing to sent - delay the release of the TBF */ |
| 615 | |
Jacob Erlbeck | fec94d1 | 2016-01-12 17:02:49 +0100 | [diff] [blame] | 616 | int space = block_data_len - write_offset; |
Jacob Erlbeck | cbb1e70 | 2015-03-25 12:21:55 +0100 | [diff] [blame] | 617 | /* A header will need to by added, so we just need |
| 618 | * space-1 octets */ |
| 619 | m_llc.put_dummy_frame(space - 1); |
| 620 | |
Jacob Erlbeck | 3bed5d1 | 2015-03-19 11:22:38 +0100 | [diff] [blame] | 621 | /* The data just drained, store the current fn */ |
| 622 | if (m_last_dl_drained_fn < 0) |
| 623 | m_last_dl_drained_fn = fn; |
| 624 | |
Jacob Erlbeck | cbb1e70 | 2015-03-25 12:21:55 +0100 | [diff] [blame] | 625 | /* It is not clear, when the next real data will |
| 626 | * arrive, so request a DL ack/nack now */ |
| 627 | request_dl_ack(); |
| 628 | |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 629 | LOGPTBFDL(this, LOGL_DEBUG, |
| 630 | "Empty chunk, added LLC dummy command of size %d, drained_since=%d\n", |
| 631 | m_llc.frame_length(), frames_since_last_drain(fn)); |
Jacob Erlbeck | cbb1e70 | 2015-03-25 12:21:55 +0100 | [diff] [blame] | 632 | } |
| 633 | |
Alexander Couzens | d38b92e | 2016-08-21 19:38:30 +0200 | [diff] [blame] | 634 | is_final = llc_queue_size() == 0 && !keep_open(fn); |
Jacob Erlbeck | cbb1e70 | 2015-03-25 12:21:55 +0100 | [diff] [blame] | 635 | |
Jacob Erlbeck | 5058bd6 | 2016-01-13 10:51:25 +0100 | [diff] [blame] | 636 | ar = Encoding::rlc_data_to_dl_append(rdbi, cs, |
Alexander Couzens | 7fdbf89 | 2016-05-21 19:45:23 +0200 | [diff] [blame] | 637 | &m_llc, &write_offset, &num_chunks, data, is_final, &payload_written); |
| 638 | |
| 639 | if (payload_written > 0) |
Pau Espin Pedrol | a107f8f | 2020-05-12 22:32:24 +0200 | [diff] [blame] | 640 | bts->do_rate_ctr_add(CTR_RLC_DL_PAYLOAD_BYTES, payload_written); |
Jacob Erlbeck | 3bed5d1 | 2015-03-19 11:22:38 +0100 | [diff] [blame] | 641 | |
Jacob Erlbeck | fec94d1 | 2016-01-12 17:02:49 +0100 | [diff] [blame] | 642 | if (ar == Encoding::AR_NEED_MORE_BLOCKS) |
| 643 | break; |
| 644 | |
Max | 0fdaa9d | 2018-01-30 16:03:10 +0100 | [diff] [blame] | 645 | LOGPTBFDL(this, LOGL_DEBUG, "Complete DL frame, len=%d\n", m_llc.frame_length()); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 646 | gprs_rlcmac_dl_bw(this, m_llc.frame_length()); |
Pau Espin Pedrol | a107f8f | 2020-05-12 22:32:24 +0200 | [diff] [blame] | 647 | bts->do_rate_ctr_add(CTR_LLC_DL_BYTES, m_llc.frame_length()); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 648 | m_llc.reset(); |
Jacob Erlbeck | 3bed5d1 | 2015-03-19 11:22:38 +0100 | [diff] [blame] | 649 | |
Jacob Erlbeck | fec94d1 | 2016-01-12 17:02:49 +0100 | [diff] [blame] | 650 | if (is_final) { |
Jacob Erlbeck | 7c44415 | 2015-03-12 12:08:54 +0100 | [diff] [blame] | 651 | request_dl_ack(); |
Max | 2399b1d | 2018-01-12 15:48:12 +0100 | [diff] [blame] | 652 | TBF_SET_STATE(this, GPRS_RLCMAC_FINISHED); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 653 | } |
Jacob Erlbeck | fec94d1 | 2016-01-12 17:02:49 +0100 | [diff] [blame] | 654 | |
| 655 | /* dequeue next LLC frame, if any */ |
| 656 | schedule_next_frame(); |
| 657 | } while (ar == Encoding::AR_COMPLETED_SPACE_LEFT); |
| 658 | |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 659 | LOGPTBFDL(this, LOGL_DEBUG, "data block (BSN %d, %s): %s\n", |
Max | 136ebcc | 2019-03-05 14:59:03 +0100 | [diff] [blame] | 660 | bsn, mcs_name(rlc_data->cs_last), |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 661 | osmo_hexdump(rlc_data->block, block_data_len)); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 662 | /* raise send state and set ack state array */ |
| 663 | m_window.m_v_b.mark_unacked(bsn); |
| 664 | m_window.increment_send(); |
| 665 | |
Jacob Erlbeck | d675249 | 2016-02-02 18:12:46 +0100 | [diff] [blame] | 666 | return bsn; |
Jacob Erlbeck | 7c44415 | 2015-03-12 12:08:54 +0100 | [diff] [blame] | 667 | } |
| 668 | |
Max | aae1bfb | 2017-07-07 13:49:29 +0200 | [diff] [blame] | 669 | bool gprs_rlcmac_dl_tbf::handle_ack_nack() |
| 670 | { |
| 671 | bool ack_recovered = false; |
| 672 | |
| 673 | state_flags |= (1 << GPRS_RLCMAC_FLAG_DL_ACK); |
Max | 8dce1de | 2018-01-02 14:17:04 +0100 | [diff] [blame] | 674 | if (check_n_clear(GPRS_RLCMAC_FLAG_TO_DL_ACK)) { |
Max | aae1bfb | 2017-07-07 13:49:29 +0200 | [diff] [blame] | 675 | ack_recovered = true; |
| 676 | } |
| 677 | |
| 678 | /* reset N3105 */ |
Max | 847ed9f | 2018-02-20 18:16:11 +0100 | [diff] [blame] | 679 | n_reset(N3105); |
Max | ee5be3a | 2017-12-20 17:31:13 +0100 | [diff] [blame] | 680 | t_stop(T3191, "ACK/NACK received"); |
Max | cac6b66 | 2018-01-24 11:00:17 +0100 | [diff] [blame] | 681 | TBF_POLL_SCHED_UNSET(this); |
Max | aae1bfb | 2017-07-07 13:49:29 +0200 | [diff] [blame] | 682 | |
| 683 | return ack_recovered; |
| 684 | } |
| 685 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 686 | struct msgb *gprs_rlcmac_dl_tbf::create_dl_acked_block( |
| 687 | const uint32_t fn, const uint8_t ts, |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 688 | int index, int index2) |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 689 | { |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 690 | uint8_t *msg_data; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 691 | struct msgb *dl_msg; |
Jacob Erlbeck | 3a3b6a7 | 2016-01-11 16:15:45 +0100 | [diff] [blame] | 692 | unsigned msg_len; |
Daniel Willmann | efd5dbb | 2014-08-25 16:20:23 +0200 | [diff] [blame] | 693 | bool need_poll; |
Jacob Erlbeck | 3a3b6a7 | 2016-01-11 16:15:45 +0100 | [diff] [blame] | 694 | /* TODO: support MCS-7 - MCS-9, where data_block_idx can be 1 */ |
Max | b3a17d6 | 2017-12-21 12:11:33 +0100 | [diff] [blame] | 695 | uint8_t data_block_idx = 0; |
Jacob Erlbeck | f2694b7 | 2016-01-26 21:46:26 +0100 | [diff] [blame] | 696 | unsigned int rrbp; |
| 697 | uint32_t new_poll_fn; |
| 698 | int rc; |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 699 | bool is_final = false; |
Jacob Erlbeck | 3a3b6a7 | 2016-01-11 16:15:45 +0100 | [diff] [blame] | 700 | gprs_rlc_data_info rlc; |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 701 | enum CodingScheme cs; |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 702 | int bsns[ARRAY_SIZE(rlc.block_info)]; |
| 703 | unsigned num_bsns; |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 704 | bool need_padding = false; |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 705 | enum egprs_rlcmac_dl_spb spb = EGPRS_RLCMAC_DL_NO_RETX; |
| 706 | unsigned int spb_status = get_egprs_dl_spb_status(index); |
Neels Hofmeyr | b609190 | 2017-02-08 16:49:20 +0100 | [diff] [blame] | 707 | |
| 708 | enum egprs_puncturing_values punct[2] = { |
| 709 | EGPRS_PS_INVALID, EGPRS_PS_INVALID |
| 710 | }; |
| 711 | osmo_static_assert(ARRAY_SIZE(rlc.block_info) == 2, |
| 712 | rlc_block_info_size_is_two); |
| 713 | |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 714 | /* |
| 715 | * TODO: This is an experimental work-around to put 2 BSN into |
| 716 | * MSC-7 to MCS-9 encoded messages. It just sends the same BSN |
| 717 | * twice in the block. The cs should be derived from the TBF's |
| 718 | * current CS such that both BSNs (that must be compatible) can |
| 719 | * be put into the data area, even if the resulting CS is higher than |
| 720 | * the current limit. |
| 721 | */ |
Aravind Sirsikar | cf2152b | 2016-07-13 18:46:17 +0530 | [diff] [blame] | 722 | cs = m_rlc.block(index)->cs_current_trans; |
Max | d4a3929 | 2019-03-13 18:44:20 +0100 | [diff] [blame] | 723 | enum CodingScheme cs_init = m_rlc.block(index)->cs_init; |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 724 | bsns[0] = index; |
| 725 | num_bsns = 1; |
Jacob Erlbeck | 3a3b6a7 | 2016-01-11 16:15:45 +0100 | [diff] [blame] | 726 | |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 727 | if (index2 >= 0) { |
| 728 | bsns[num_bsns] = index2; |
| 729 | num_bsns += 1; |
| 730 | } |
| 731 | |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 732 | update_coding_scheme_counter_dl(cs); |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 733 | /* |
| 734 | * if the intial mcs is 8 and retransmission mcs is either 6 or 3 |
| 735 | * we have to include the padding of 6 octets in first segment |
| 736 | */ |
Max | d4a3929 | 2019-03-13 18:44:20 +0100 | [diff] [blame] | 737 | if ((cs_init == MCS8) && |
| 738 | (cs == MCS6 || cs == MCS3)) { |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 739 | if (spb_status == EGPRS_RESEG_DL_DEFAULT || |
Max | d4a3929 | 2019-03-13 18:44:20 +0100 | [diff] [blame] | 740 | spb_status == EGPRS_RESEG_SECOND_SEG_SENT) |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 741 | need_padding = true; |
| 742 | } else if (num_bsns == 1) { |
Jacob Erlbeck | be881c0 | 2016-02-03 20:44:46 +0100 | [diff] [blame] | 743 | /* TODO: remove the conditional when MCS-6 padding isn't |
| 744 | * failing to be decoded by MEs anymore */ |
Aravind Sirsikar | cf2152b | 2016-07-13 18:46:17 +0530 | [diff] [blame] | 745 | /* TODO: support of MCS-8 -> MCS-6 transition should be |
| 746 | * handled |
| 747 | * Refer commit be881c028fc4da00c4046ecd9296727975c206a3 |
| 748 | * dated 2016-02-07 23:45:40 (UTC) |
| 749 | */ |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 750 | if (cs != MCS8) |
| 751 | mcs_dec_to_single_block(&cs, &need_padding); |
Jacob Erlbeck | be881c0 | 2016-02-03 20:44:46 +0100 | [diff] [blame] | 752 | } |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 753 | |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 754 | spb = get_egprs_dl_spb(index); |
| 755 | |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 756 | LOGPTBFDL(this, LOGL_DEBUG, "need_padding %d spb_status %d spb %d (BSN1 %d BSN2 %d)\n", |
| 757 | need_padding, spb_status, spb, index, index2); |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 758 | |
| 759 | gprs_rlc_data_info_init_dl(&rlc, cs, need_padding, spb); |
Jacob Erlbeck | 3a3b6a7 | 2016-01-11 16:15:45 +0100 | [diff] [blame] | 760 | |
| 761 | rlc.usf = 7; /* will be set at scheduler */ |
| 762 | rlc.pr = 0; /* FIXME: power reduction */ |
| 763 | rlc.tfi = m_tfi; /* TFI */ |
| 764 | |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 765 | /* return data block(s) as message */ |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 766 | msg_len = mcs_size_dl(cs); |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 767 | dl_msg = msgb_alloc(msg_len, "rlcmac_dl_data"); |
| 768 | if (!dl_msg) |
| 769 | return NULL; |
| 770 | |
| 771 | msg_data = msgb_put(dl_msg, msg_len); |
| 772 | |
Aravind Sirsikar | b119198 | 2016-08-26 18:13:10 +0530 | [diff] [blame] | 773 | OSMO_ASSERT(rlc.num_data_blocks <= ARRAY_SIZE(rlc.block_info)); |
| 774 | OSMO_ASSERT(rlc.num_data_blocks > 0); |
| 775 | |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 776 | LOGPTBFDL(this, LOGL_DEBUG, "Copying %u RLC blocks, %u BSNs\n", rlc.num_data_blocks, num_bsns); |
Max | 5759a19 | 2017-09-08 12:23:12 +0200 | [diff] [blame] | 777 | |
Max | b3a17d6 | 2017-12-21 12:11:33 +0100 | [diff] [blame] | 778 | /* Copy block(s) to RLC message: the num_data_blocks cannot be more than 2 - see assert above */ |
| 779 | for (data_block_idx = 0; data_block_idx < OSMO_MIN(rlc.num_data_blocks, 2); |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 780 | data_block_idx++) |
| 781 | { |
| 782 | int bsn; |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 783 | uint8_t *block_data; |
| 784 | gprs_rlc_data_block_info *rdbi, *block_info; |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 785 | enum egprs_rlc_dl_reseg_bsn_state reseg_status; |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 786 | |
| 787 | /* Check if there are more blocks than BSNs */ |
| 788 | if (data_block_idx < num_bsns) |
| 789 | bsn = bsns[data_block_idx]; |
| 790 | else |
| 791 | bsn = bsns[0]; |
| 792 | |
Aravind Sirsikar | 7952282 | 2016-03-23 18:29:47 +0530 | [diff] [blame] | 793 | /* Get current puncturing scheme from block */ |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 794 | |
| 795 | m_rlc.block(bsn)->next_ps = gprs_get_punct_scheme( |
Aravind Sirsikar | 7952282 | 2016-03-23 18:29:47 +0530 | [diff] [blame] | 796 | m_rlc.block(bsn)->next_ps, |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 797 | m_rlc.block(bsn)->cs_last, cs, spb); |
Aravind Sirsikar | 7952282 | 2016-03-23 18:29:47 +0530 | [diff] [blame] | 798 | |
Max | 8a8e0fb | 2019-03-25 16:32:50 +0100 | [diff] [blame] | 799 | if (mcs_is_edge(cs)) { |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 800 | OSMO_ASSERT(m_rlc.block(bsn)->next_ps >= EGPRS_PS_1); |
| 801 | OSMO_ASSERT(m_rlc.block(bsn)->next_ps <= EGPRS_PS_3); |
Aravind Sirsikar | 7952282 | 2016-03-23 18:29:47 +0530 | [diff] [blame] | 802 | } |
Max | b3a17d6 | 2017-12-21 12:11:33 +0100 | [diff] [blame] | 803 | |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 804 | punct[data_block_idx] = m_rlc.block(bsn)->next_ps; |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 805 | |
| 806 | rdbi = &rlc.block_info[data_block_idx]; |
| 807 | block_info = &m_rlc.block(bsn)->block_info; |
| 808 | |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 809 | /* |
| 810 | * get data and header from current block |
| 811 | * function returns the reseg status |
Aravind Sirsikar | 7952282 | 2016-03-23 18:29:47 +0530 | [diff] [blame] | 812 | */ |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 813 | reseg_status = egprs_dl_get_data(bsn, &block_data); |
| 814 | m_rlc.block(bsn)->spb_status.block_status_dl = reseg_status; |
| 815 | |
| 816 | /* |
| 817 | * If it is first segment of the split block set the state of |
| 818 | * bsn to nacked. If it is the first segment dont update the |
| 819 | * next ps value of bsn. since next segment also needs same cps |
| 820 | */ |
| 821 | if (spb == EGPRS_RLCMAC_DL_FIRST_SEG) |
| 822 | m_window.m_v_b.mark_nacked(bsn); |
| 823 | else { |
| 824 | /* |
| 825 | * TODO: Need to handle 2 same bsns |
| 826 | * in header type 1 |
| 827 | */ |
| 828 | gprs_update_punct_scheme(&m_rlc.block(bsn)->next_ps, |
| 829 | cs); |
| 830 | } |
Aravind Sirsikar | 7952282 | 2016-03-23 18:29:47 +0530 | [diff] [blame] | 831 | |
Aravind Sirsikar | cf2152b | 2016-07-13 18:46:17 +0530 | [diff] [blame] | 832 | m_rlc.block(bsn)->cs_last = cs; |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 833 | rdbi->e = block_info->e; |
| 834 | rdbi->cv = block_info->cv; |
| 835 | rdbi->bsn = bsn; |
| 836 | is_final = is_final || rdbi->cv == 0; |
| 837 | |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 838 | LOGPTBFDL(this, LOGL_DEBUG, "Copying data unit %d (BSN %d)\n", |
| 839 | data_block_idx, bsn); |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 840 | |
| 841 | Encoding::rlc_copy_from_aligned_buffer(&rlc, data_block_idx, |
| 842 | msg_data, block_data); |
| 843 | } |
| 844 | |
Neels Hofmeyr | 49b83ec | 2017-02-08 15:47:19 +0100 | [diff] [blame] | 845 | /* Calculate CPS only for EGPRS case */ |
Max | 8a8e0fb | 2019-03-25 16:32:50 +0100 | [diff] [blame] | 846 | if (mcs_is_edge(cs)) |
Neels Hofmeyr | 49b83ec | 2017-02-08 15:47:19 +0100 | [diff] [blame] | 847 | rlc.cps = gprs_rlc_mcs_cps(cs, punct[0], punct[1], need_padding); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 848 | |
Jacob Erlbeck | 005ee7f | 2015-03-20 14:53:54 +0100 | [diff] [blame] | 849 | /* If the TBF has just started, relate frames_since_last_poll to the |
| 850 | * current fn */ |
| 851 | if (m_last_dl_poll_fn < 0) |
| 852 | m_last_dl_poll_fn = fn; |
| 853 | |
Daniel Willmann | efd5dbb | 2014-08-25 16:20:23 +0200 | [diff] [blame] | 854 | need_poll = state_flags & (1 << GPRS_RLCMAC_FLAG_TO_DL_ACK); |
Jacob Erlbeck | 3a3b6a7 | 2016-01-11 16:15:45 +0100 | [diff] [blame] | 855 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 856 | /* poll after POLL_ACK_AFTER_FRAMES frames, or when final block is tx. |
| 857 | */ |
Jacob Erlbeck | 7c44415 | 2015-03-12 12:08:54 +0100 | [diff] [blame] | 858 | if (m_tx_counter >= POLL_ACK_AFTER_FRAMES || m_dl_ack_requested || |
Daniel Willmann | efd5dbb | 2014-08-25 16:20:23 +0200 | [diff] [blame] | 859 | need_poll) { |
Jacob Erlbeck | 7c44415 | 2015-03-12 12:08:54 +0100 | [diff] [blame] | 860 | if (m_dl_ack_requested) { |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 861 | LOGPTBFDL(this, LOGL_DEBUG, |
Pau Espin Pedrol | 30f6617 | 2019-12-04 18:07:49 +0100 | [diff] [blame] | 862 | "Scheduling Ack/Nack polling, because it was requested explicitly " |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 863 | "(e.g. first final block sent).\n"); |
Daniel Willmann | efd5dbb | 2014-08-25 16:20:23 +0200 | [diff] [blame] | 864 | } else if (need_poll) { |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 865 | LOGPTBFDL(this, LOGL_DEBUG, |
| 866 | "Scheduling Ack/Nack polling, because polling timed out.\n"); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 867 | } else { |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 868 | LOGPTBFDL(this, LOGL_DEBUG, |
| 869 | "Scheduling Ack/Nack polling, because %d blocks sent.\n", |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 870 | POLL_ACK_AFTER_FRAMES); |
| 871 | } |
Jacob Erlbeck | f2694b7 | 2016-01-26 21:46:26 +0100 | [diff] [blame] | 872 | |
| 873 | rc = check_polling(fn, ts, &new_poll_fn, &rrbp); |
| 874 | if (rc >= 0) { |
Max | f60cf62 | 2017-07-10 14:40:09 +0200 | [diff] [blame] | 875 | set_polling(new_poll_fn, ts, GPRS_RLCMAC_POLL_DL_ACK); |
Jacob Erlbeck | f2694b7 | 2016-01-26 21:46:26 +0100 | [diff] [blame] | 876 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 877 | m_tx_counter = 0; |
| 878 | /* start timer whenever we send the final block */ |
Jacob Erlbeck | be314d9 | 2016-02-02 15:32:10 +0100 | [diff] [blame] | 879 | if (is_final) |
Pau Espin Pedrol | 28f160e | 2019-09-05 14:48:35 +0200 | [diff] [blame] | 880 | T_START(this, T3191, 3191, "final block (DL-TBF)", true); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 881 | |
Max | 8dce1de | 2018-01-02 14:17:04 +0100 | [diff] [blame] | 882 | state_flags &= ~(1 << GPRS_RLCMAC_FLAG_TO_DL_ACK); /* clear poll timeout flag */ |
Daniel Willmann | efd5dbb | 2014-08-25 16:20:23 +0200 | [diff] [blame] | 883 | |
Jacob Erlbeck | 7c44415 | 2015-03-12 12:08:54 +0100 | [diff] [blame] | 884 | /* Clear request flag */ |
| 885 | m_dl_ack_requested = false; |
| 886 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 887 | /* set polling in header */ |
Jacob Erlbeck | f2694b7 | 2016-01-26 21:46:26 +0100 | [diff] [blame] | 888 | rlc.rrbp = rrbp; |
Jacob Erlbeck | 3a3b6a7 | 2016-01-11 16:15:45 +0100 | [diff] [blame] | 889 | rlc.es_p = 1; /* Polling */ |
Jacob Erlbeck | 005ee7f | 2015-03-20 14:53:54 +0100 | [diff] [blame] | 890 | |
| 891 | m_last_dl_poll_fn = poll_fn; |
Jacob Erlbeck | 16d29c7 | 2015-08-24 13:30:39 +0200 | [diff] [blame] | 892 | |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 893 | LOGPTBFDL(this, LOGL_INFO, |
| 894 | "Scheduled Ack/Nack polling on FN=%d, TS=%d\n", |
| 895 | poll_fn, poll_ts); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 896 | } |
| 897 | } |
| 898 | |
Jacob Erlbeck | 3a3b6a7 | 2016-01-11 16:15:45 +0100 | [diff] [blame] | 899 | Encoding::rlc_write_dl_data_header(&rlc, msg_data); |
Jacob Erlbeck | 3a3b6a7 | 2016-01-11 16:15:45 +0100 | [diff] [blame] | 900 | |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 901 | LOGPTBFDL(this, LOGL_DEBUG, "msg block (BSN %d, %s%s): %s\n", |
Max | 136ebcc | 2019-03-05 14:59:03 +0100 | [diff] [blame] | 902 | index, mcs_name(cs), |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 903 | need_padding ? ", padded" : "", |
| 904 | msgb_hexdump(dl_msg)); |
Jacob Erlbeck | 3a3b6a7 | 2016-01-11 16:15:45 +0100 | [diff] [blame] | 905 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 906 | /* Increment TX-counter */ |
| 907 | m_tx_counter++; |
| 908 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 909 | return dl_msg; |
| 910 | } |
| 911 | |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 912 | static uint16_t bitnum_to_bsn(int bitnum, uint16_t ssn) |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 913 | { |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 914 | return ssn - 1 - bitnum; |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 915 | } |
| 916 | |
Jacob Erlbeck | 2db0f08 | 2015-09-07 18:49:00 +0200 | [diff] [blame] | 917 | int gprs_rlcmac_dl_tbf::analyse_errors(char *show_rbb, uint8_t ssn, |
| 918 | ana_result *res) |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 919 | { |
| 920 | gprs_rlc_data *rlc_data; |
| 921 | uint16_t lost = 0, received = 0, skipped = 0; |
Jacob Erlbeck | b41262f | 2016-02-05 17:13:24 +0100 | [diff] [blame] | 922 | char info[RLC_MAX_WS + 1]; |
| 923 | memset(info, '.', m_window.ws()); |
| 924 | info[m_window.ws()] = 0; |
Jacob Erlbeck | a17fccb | 2015-06-04 16:52:23 +0200 | [diff] [blame] | 925 | uint16_t bsn = 0; |
Jacob Erlbeck | 2db0f08 | 2015-09-07 18:49:00 +0200 | [diff] [blame] | 926 | unsigned received_bytes = 0, lost_bytes = 0; |
| 927 | unsigned received_packets = 0, lost_packets = 0; |
Jacob Erlbeck | b41262f | 2016-02-05 17:13:24 +0100 | [diff] [blame] | 928 | unsigned num_blocks = strlen(show_rbb); |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 929 | |
aravind sirsikar | fb41afa | 2016-11-02 15:48:00 +0530 | [diff] [blame] | 930 | unsigned distance = m_window.distance(); |
| 931 | |
| 932 | num_blocks = num_blocks > distance |
| 933 | ? distance : num_blocks; |
| 934 | |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 935 | /* SSN - 1 is in range V(A)..V(S)-1 */ |
Jacob Erlbeck | b41262f | 2016-02-05 17:13:24 +0100 | [diff] [blame] | 936 | for (unsigned int bitpos = 0; bitpos < num_blocks; bitpos++) { |
| 937 | bool is_received; |
| 938 | int index = num_blocks - 1 - bitpos; |
| 939 | |
| 940 | is_received = (index >= 0 && show_rbb[index] == 'R'); |
Jacob Erlbeck | 2db0f08 | 2015-09-07 18:49:00 +0200 | [diff] [blame] | 941 | |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 942 | bsn = m_window.mod_sns(bitnum_to_bsn(bitpos, ssn)); |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 943 | |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 944 | if (bsn == m_window.mod_sns(m_window.v_a() - 1)) { |
Jacob Erlbeck | a17fccb | 2015-06-04 16:52:23 +0200 | [diff] [blame] | 945 | info[bitpos] = '$'; |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 946 | break; |
Jacob Erlbeck | a17fccb | 2015-06-04 16:52:23 +0200 | [diff] [blame] | 947 | } |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 948 | |
| 949 | rlc_data = m_rlc.block(bsn); |
Jacob Erlbeck | a17fccb | 2015-06-04 16:52:23 +0200 | [diff] [blame] | 950 | if (!rlc_data) { |
| 951 | info[bitpos] = '0'; |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 952 | continue; |
Jacob Erlbeck | a17fccb | 2015-06-04 16:52:23 +0200 | [diff] [blame] | 953 | } |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 954 | |
Jacob Erlbeck | 2db0f08 | 2015-09-07 18:49:00 +0200 | [diff] [blame] | 955 | /* Get general statistics */ |
| 956 | if (is_received && !m_window.m_v_b.is_acked(bsn)) { |
| 957 | received_packets += 1; |
| 958 | received_bytes += rlc_data->len; |
| 959 | } else if (!is_received && !m_window.m_v_b.is_nacked(bsn)) { |
| 960 | lost_packets += 1; |
| 961 | lost_bytes += rlc_data->len; |
| 962 | } |
| 963 | |
| 964 | /* Get statistics for current CS */ |
| 965 | |
Aravind Sirsikar | 9149552 | 2016-07-12 14:17:12 +0530 | [diff] [blame] | 966 | if (rlc_data->cs_last != current_cs()) { |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 967 | /* This block has already been encoded with a different |
| 968 | * CS, so it doesn't help us to decide, whether the |
| 969 | * current CS is ok. Ignore it. */ |
Jacob Erlbeck | a17fccb | 2015-06-04 16:52:23 +0200 | [diff] [blame] | 970 | info[bitpos] = 'x'; |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 971 | skipped += 1; |
| 972 | continue; |
| 973 | } |
| 974 | |
Jacob Erlbeck | 2db0f08 | 2015-09-07 18:49:00 +0200 | [diff] [blame] | 975 | if (is_received) { |
Jacob Erlbeck | a17fccb | 2015-06-04 16:52:23 +0200 | [diff] [blame] | 976 | if (!m_window.m_v_b.is_acked(bsn)) { |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 977 | received += 1; |
Jacob Erlbeck | a17fccb | 2015-06-04 16:52:23 +0200 | [diff] [blame] | 978 | info[bitpos] = 'R'; |
| 979 | } else { |
| 980 | info[bitpos] = 'r'; |
| 981 | } |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 982 | } else { |
Jacob Erlbeck | a17fccb | 2015-06-04 16:52:23 +0200 | [diff] [blame] | 983 | info[bitpos] = 'L'; |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 984 | lost += 1; |
| 985 | } |
| 986 | } |
| 987 | |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 988 | LOGPTBFDL(this, LOGL_DEBUG, |
| 989 | "DL analysis, range=%d:%d, lost=%d, recv=%d, skipped=%d, bsn=%d, info='%s'\n", |
| 990 | m_window.v_a(), m_window.v_s(), lost, received, skipped, bsn, info); |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 991 | |
Jacob Erlbeck | 2db0f08 | 2015-09-07 18:49:00 +0200 | [diff] [blame] | 992 | res->received_packets = received_packets; |
| 993 | res->lost_packets = lost_packets; |
| 994 | res->received_bytes = received_bytes; |
| 995 | res->lost_bytes = lost_bytes; |
| 996 | |
Jacob Erlbeck | 144a1d0 | 2015-06-04 16:51:44 +0200 | [diff] [blame] | 997 | if (lost + received <= 1) |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 998 | return -1; |
| 999 | |
| 1000 | return lost * 100 / (lost + received); |
| 1001 | } |
| 1002 | |
Pau Espin Pedrol | b3f2397 | 2020-10-23 21:00:23 +0200 | [diff] [blame] | 1003 | gprs_rlc_window *gprs_rlcmac_dl_tbf::window() |
Max | ea98b7d | 2018-01-04 15:13:27 +0100 | [diff] [blame] | 1004 | { |
| 1005 | return &m_window; |
| 1006 | } |
| 1007 | |
Jacob Erlbeck | eb08f86 | 2016-02-05 17:07:12 +0100 | [diff] [blame] | 1008 | int gprs_rlcmac_dl_tbf::update_window(unsigned first_bsn, |
| 1009 | const struct bitvec *rbb) |
| 1010 | { |
aravind sirsikar | fb41afa | 2016-11-02 15:48:00 +0530 | [diff] [blame] | 1011 | unsigned dist; |
Jacob Erlbeck | eb08f86 | 2016-02-05 17:07:12 +0100 | [diff] [blame] | 1012 | uint16_t lost = 0, received = 0; |
| 1013 | char show_v_b[RLC_MAX_SNS + 1]; |
| 1014 | char show_rbb[RLC_MAX_SNS + 1]; |
| 1015 | int error_rate; |
| 1016 | struct ana_result ana_res; |
aravind sirsikar | fb41afa | 2016-11-02 15:48:00 +0530 | [diff] [blame] | 1017 | dist = m_window.distance(); |
| 1018 | unsigned num_blocks = rbb->cur_bit > dist |
| 1019 | ? dist : rbb->cur_bit; |
Jacob Erlbeck | eb08f86 | 2016-02-05 17:07:12 +0100 | [diff] [blame] | 1020 | unsigned behind_last_bsn = m_window.mod_sns(first_bsn + num_blocks); |
| 1021 | |
| 1022 | Decoding::extract_rbb(rbb, show_rbb); |
| 1023 | /* show received array in debug */ |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 1024 | LOGPTBFDL(this, LOGL_DEBUG, |
| 1025 | "ack: (BSN=%d)\"%s\"(BSN=%d) R=ACK I=NACK\n", |
| 1026 | first_bsn, show_rbb, m_window.mod_sns(behind_last_bsn - 1)); |
Jacob Erlbeck | eb08f86 | 2016-02-05 17:07:12 +0100 | [diff] [blame] | 1027 | |
Jacob Erlbeck | eb08f86 | 2016-02-05 17:07:12 +0100 | [diff] [blame] | 1028 | error_rate = analyse_errors(show_rbb, behind_last_bsn, &ana_res); |
| 1029 | |
| 1030 | if (bts_data()->cs_adj_enabled && ms()) |
| 1031 | ms()->update_error_rate(this, error_rate); |
| 1032 | |
| 1033 | m_window.update(bts, rbb, first_bsn, &lost, &received); |
sivasankari | 5395073 | 2016-12-08 17:15:17 +0530 | [diff] [blame] | 1034 | rate_ctr_add(&m_ctrs->ctr[TBF_CTR_RLC_NACKED], lost); |
Jacob Erlbeck | eb08f86 | 2016-02-05 17:07:12 +0100 | [diff] [blame] | 1035 | |
| 1036 | /* report lost and received packets */ |
| 1037 | gprs_rlcmac_received_lost(this, received, lost); |
| 1038 | |
| 1039 | /* Used to measure the leak rate */ |
| 1040 | gprs_bssgp_update_bytes_received(ana_res.received_bytes, |
| 1041 | ana_res.received_packets + ana_res.lost_packets); |
| 1042 | |
| 1043 | /* raise V(A), if possible */ |
| 1044 | m_window.raise(m_window.move_window()); |
| 1045 | |
| 1046 | /* show receive state array in debug (V(A)..V(S)-1) */ |
| 1047 | m_window.show_state(show_v_b); |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 1048 | LOGPTBFDL(this, LOGL_DEBUG, |
| 1049 | "V(B): (V(A)=%d)\"%s\"(V(S)-1=%d) A=Acked N=Nacked U=Unacked X=Resend-Unacked I=Invalid\n", |
| 1050 | m_window.v_a(), show_v_b, m_window.v_s_mod(-1)); |
Jacob Erlbeck | eb08f86 | 2016-02-05 17:07:12 +0100 | [diff] [blame] | 1051 | return 0; |
| 1052 | } |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 1053 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1054 | int gprs_rlcmac_dl_tbf::update_window(const uint8_t ssn, const uint8_t *rbb) |
| 1055 | { |
| 1056 | int16_t dist; /* must be signed */ |
| 1057 | uint16_t lost = 0, received = 0; |
| 1058 | char show_rbb[65]; |
| 1059 | char show_v_b[RLC_MAX_SNS + 1]; |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 1060 | int error_rate; |
Jacob Erlbeck | 2db0f08 | 2015-09-07 18:49:00 +0200 | [diff] [blame] | 1061 | struct ana_result ana_res; |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1062 | |
| 1063 | Decoding::extract_rbb(rbb, show_rbb); |
| 1064 | /* show received array in debug (bit 64..1) */ |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 1065 | LOGPTBFDL(this, LOGL_DEBUG, |
| 1066 | "ack: (BSN=%d)\"%s\"(BSN=%d) R=ACK I=NACK\n", |
| 1067 | m_window.mod_sns(ssn - 64), show_rbb, m_window.mod_sns(ssn - 1)); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1068 | |
| 1069 | /* apply received array to receive state (SSN-64..SSN-1) */ |
| 1070 | /* calculate distance of ssn from V(S) */ |
Jacob Erlbeck | 93c55d0 | 2015-12-23 16:29:07 +0100 | [diff] [blame] | 1071 | dist = m_window.mod_sns(m_window.v_s() - ssn); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1072 | /* check if distance is less than distance V(A)..V(S) */ |
| 1073 | if (dist >= m_window.distance()) { |
| 1074 | /* this might happpen, if the downlink assignment |
| 1075 | * was not received by ms and the ack refers |
| 1076 | * to previous TBF |
| 1077 | * FIXME: we should implement polling for |
| 1078 | * control ack!*/ |
Max | c21f007 | 2017-12-15 17:36:45 +0100 | [diff] [blame] | 1079 | LOGPTBFDL(this, LOGL_NOTICE, "ack range is out of V(A)..V(S) range - Free TBF!\n"); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1080 | return 1; /* indicate to free TBF */ |
| 1081 | } |
| 1082 | |
Jacob Erlbeck | 2db0f08 | 2015-09-07 18:49:00 +0200 | [diff] [blame] | 1083 | error_rate = analyse_errors(show_rbb, ssn, &ana_res); |
| 1084 | |
| 1085 | if (bts_data()->cs_adj_enabled && ms()) |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 1086 | ms()->update_error_rate(this, error_rate); |
Jacob Erlbeck | 1751c62 | 2015-06-04 12:12:32 +0200 | [diff] [blame] | 1087 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1088 | m_window.update(bts, show_rbb, ssn, |
| 1089 | &lost, &received); |
sivasankari | 5395073 | 2016-12-08 17:15:17 +0530 | [diff] [blame] | 1090 | rate_ctr_add(&m_ctrs->ctr[TBF_CTR_RLC_NACKED], lost); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1091 | |
| 1092 | /* report lost and received packets */ |
| 1093 | gprs_rlcmac_received_lost(this, received, lost); |
| 1094 | |
Jacob Erlbeck | 2db0f08 | 2015-09-07 18:49:00 +0200 | [diff] [blame] | 1095 | /* Used to measure the leak rate */ |
| 1096 | gprs_bssgp_update_bytes_received(ana_res.received_bytes, |
| 1097 | ana_res.received_packets + ana_res.lost_packets); |
| 1098 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1099 | /* raise V(A), if possible */ |
| 1100 | m_window.raise(m_window.move_window()); |
| 1101 | |
| 1102 | /* show receive state array in debug (V(A)..V(S)-1) */ |
| 1103 | m_window.show_state(show_v_b); |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 1104 | LOGPTBFDL(this, LOGL_DEBUG, |
| 1105 | "V(B): (V(A)=%d)\"%s\"(V(S)-1=%d) A=Acked N=Nacked U=Unacked X=Resend-Unacked I=Invalid\n", |
| 1106 | m_window.v_a(), show_v_b, m_window.v_s_mod(-1)); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1107 | |
| 1108 | if (state_is(GPRS_RLCMAC_FINISHED) && m_window.window_empty()) { |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 1109 | LOGPTBFDL(this, LOGL_NOTICE, |
| 1110 | "Received acknowledge of all blocks, but without final ack inidcation (don't worry)\n"); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1111 | } |
| 1112 | return 0; |
| 1113 | } |
| 1114 | |
| 1115 | |
| 1116 | int gprs_rlcmac_dl_tbf::maybe_start_new_window() |
| 1117 | { |
Jacob Erlbeck | 91ff7d1 | 2015-09-01 11:20:29 +0200 | [diff] [blame] | 1118 | release(); |
| 1119 | |
| 1120 | /* check for LLC PDU in the LLC Queue */ |
Alexander Couzens | d38b92e | 2016-08-21 19:38:30 +0200 | [diff] [blame] | 1121 | if (llc_queue_size() > 0) |
Jacob Erlbeck | 91ff7d1 | 2015-09-01 11:20:29 +0200 | [diff] [blame] | 1122 | /* we have more data so we will re-use this tbf */ |
| 1123 | establish_dl_tbf_on_pacch(); |
| 1124 | |
| 1125 | return 0; |
| 1126 | } |
| 1127 | |
| 1128 | int gprs_rlcmac_dl_tbf::release() |
| 1129 | { |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1130 | uint16_t received; |
| 1131 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1132 | /* range V(A)..V(S)-1 */ |
| 1133 | received = m_window.count_unacked(); |
| 1134 | |
| 1135 | /* report all outstanding packets as received */ |
| 1136 | gprs_rlcmac_received_lost(this, received, 0); |
| 1137 | |
Max | 2399b1d | 2018-01-12 15:48:12 +0100 | [diff] [blame] | 1138 | TBF_SET_STATE(this, GPRS_RLCMAC_WAIT_RELEASE); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1139 | |
Jacob Erlbeck | 04e72d3 | 2015-08-13 18:36:56 +0200 | [diff] [blame] | 1140 | /* start T3193 */ |
Pau Espin Pedrol | 28f160e | 2019-09-05 14:48:35 +0200 | [diff] [blame] | 1141 | T_START(this, T3193, 3193, "release (DL-TBF)", true); |
Jacob Erlbeck | 04e72d3 | 2015-08-13 18:36:56 +0200 | [diff] [blame] | 1142 | |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1143 | /* reset rlc states */ |
| 1144 | m_tx_counter = 0; |
| 1145 | m_wait_confirm = 0; |
| 1146 | m_window.reset(); |
| 1147 | |
Max | 5d7f757 | 2018-01-30 16:56:43 +0100 | [diff] [blame] | 1148 | TBF_ASS_TYPE_UNSET(this, GPRS_RLCMAC_FLAG_CCCH); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1149 | |
Jacob Erlbeck | 91ff7d1 | 2015-09-01 11:20:29 +0200 | [diff] [blame] | 1150 | return 0; |
| 1151 | } |
| 1152 | |
Jacob Erlbeck | f04a5b3 | 2016-01-21 20:42:40 +0100 | [diff] [blame] | 1153 | int gprs_rlcmac_dl_tbf::abort() |
| 1154 | { |
| 1155 | uint16_t lost; |
| 1156 | |
| 1157 | if (state_is(GPRS_RLCMAC_FLOW)) { |
| 1158 | /* range V(A)..V(S)-1 */ |
| 1159 | lost = m_window.count_unacked(); |
| 1160 | |
| 1161 | /* report all outstanding packets as lost */ |
| 1162 | gprs_rlcmac_received_lost(this, 0, lost); |
| 1163 | gprs_rlcmac_lost_rep(this); |
| 1164 | |
| 1165 | /* TODO: Reschedule all LLC frames starting with the one that is |
| 1166 | * (partly) encoded in chunk 1 of block V(A). (optional) */ |
| 1167 | } |
| 1168 | |
Max | 2399b1d | 2018-01-12 15:48:12 +0100 | [diff] [blame] | 1169 | TBF_SET_STATE(this, GPRS_RLCMAC_RELEASING); |
Jacob Erlbeck | f04a5b3 | 2016-01-21 20:42:40 +0100 | [diff] [blame] | 1170 | |
| 1171 | /* reset rlc states */ |
| 1172 | m_window.reset(); |
| 1173 | |
Max | 5d7f757 | 2018-01-30 16:56:43 +0100 | [diff] [blame] | 1174 | TBF_ASS_TYPE_UNSET(this, GPRS_RLCMAC_FLAG_CCCH); |
Jacob Erlbeck | f04a5b3 | 2016-01-21 20:42:40 +0100 | [diff] [blame] | 1175 | |
| 1176 | return 0; |
| 1177 | } |
Jacob Erlbeck | 91ff7d1 | 2015-09-01 11:20:29 +0200 | [diff] [blame] | 1178 | |
Max | 7df82d4 | 2017-12-15 11:14:30 +0100 | [diff] [blame] | 1179 | int gprs_rlcmac_dl_tbf::rcvd_dl_ack(bool final_ack, unsigned first_bsn, |
Jacob Erlbeck | eb08f86 | 2016-02-05 17:07:12 +0100 | [diff] [blame] | 1180 | struct bitvec *rbb) |
| 1181 | { |
Jacob Erlbeck | b4beb54 | 2016-01-15 13:38:31 +0100 | [diff] [blame] | 1182 | int rc; |
Max | c21f007 | 2017-12-15 17:36:45 +0100 | [diff] [blame] | 1183 | LOGPTBFDL(this, LOGL_DEBUG, "downlink acknowledge\n"); |
Jacob Erlbeck | eb08f86 | 2016-02-05 17:07:12 +0100 | [diff] [blame] | 1184 | |
Jacob Erlbeck | b4beb54 | 2016-01-15 13:38:31 +0100 | [diff] [blame] | 1185 | rc = update_window(first_bsn, rbb); |
Jacob Erlbeck | eb08f86 | 2016-02-05 17:07:12 +0100 | [diff] [blame] | 1186 | |
Jacob Erlbeck | b4beb54 | 2016-01-15 13:38:31 +0100 | [diff] [blame] | 1187 | if (final_ack) { |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 1188 | LOGPTBFDL(this, LOGL_DEBUG, "Final ACK received.\n"); |
Jacob Erlbeck | b4beb54 | 2016-01-15 13:38:31 +0100 | [diff] [blame] | 1189 | rc = maybe_start_new_window(); |
| 1190 | } else if (state_is(GPRS_RLCMAC_FINISHED) && m_window.window_empty()) { |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 1191 | LOGPTBFDL(this, LOGL_NOTICE, |
| 1192 | "Received acknowledge of all blocks, but without final ack indication (don't worry)\n"); |
Jacob Erlbeck | b4beb54 | 2016-01-15 13:38:31 +0100 | [diff] [blame] | 1193 | } |
| 1194 | |
| 1195 | return rc; |
Jacob Erlbeck | eb08f86 | 2016-02-05 17:07:12 +0100 | [diff] [blame] | 1196 | } |
| 1197 | |
Max | 7df82d4 | 2017-12-15 11:14:30 +0100 | [diff] [blame] | 1198 | int gprs_rlcmac_dl_tbf::rcvd_dl_ack(bool final_ack, uint8_t ssn, uint8_t *rbb) |
Jacob Erlbeck | 91ff7d1 | 2015-09-01 11:20:29 +0200 | [diff] [blame] | 1199 | { |
Max | c21f007 | 2017-12-15 17:36:45 +0100 | [diff] [blame] | 1200 | LOGPTBFDL(this, LOGL_DEBUG, "downlink acknowledge\n"); |
Jacob Erlbeck | 91ff7d1 | 2015-09-01 11:20:29 +0200 | [diff] [blame] | 1201 | |
| 1202 | if (!final_ack) |
| 1203 | return update_window(ssn, rbb); |
| 1204 | |
Max | c21f007 | 2017-12-15 17:36:45 +0100 | [diff] [blame] | 1205 | LOGPTBFDL(this, LOGL_DEBUG, "Final ACK received.\n"); |
Jacob Erlbeck | 91ff7d1 | 2015-09-01 11:20:29 +0200 | [diff] [blame] | 1206 | return maybe_start_new_window(); |
Daniel Willmann | ca102af | 2014-08-08 12:14:12 +0200 | [diff] [blame] | 1207 | } |
| 1208 | |
| 1209 | bool gprs_rlcmac_dl_tbf::dl_window_stalled() const |
| 1210 | { |
| 1211 | return m_window.window_stalled(); |
| 1212 | } |
| 1213 | |
Jacob Erlbeck | eceb910 | 2015-03-20 14:41:50 +0100 | [diff] [blame] | 1214 | void gprs_rlcmac_dl_tbf::request_dl_ack() |
| 1215 | { |
| 1216 | m_dl_ack_requested = true; |
| 1217 | } |
| 1218 | |
| 1219 | bool gprs_rlcmac_dl_tbf::need_control_ts() const |
| 1220 | { |
Max | cac6b66 | 2018-01-24 11:00:17 +0100 | [diff] [blame] | 1221 | if (poll_scheduled()) |
Jacob Erlbeck | eceb910 | 2015-03-20 14:41:50 +0100 | [diff] [blame] | 1222 | return false; |
| 1223 | |
| 1224 | return state_flags & (1 << GPRS_RLCMAC_FLAG_TO_DL_ACK) || |
| 1225 | m_tx_counter >= POLL_ACK_AFTER_FRAMES || |
| 1226 | m_dl_ack_requested; |
| 1227 | } |
| 1228 | |
| 1229 | bool gprs_rlcmac_dl_tbf::have_data() const |
| 1230 | { |
Jacob Erlbeck | 489a2b3 | 2015-05-28 19:07:01 +0200 | [diff] [blame] | 1231 | return m_llc.chunk_size() > 0 || |
Alexander Couzens | d38b92e | 2016-08-21 19:38:30 +0200 | [diff] [blame] | 1232 | (llc_queue_size() > 0); |
Jacob Erlbeck | eceb910 | 2015-03-20 14:41:50 +0100 | [diff] [blame] | 1233 | } |
Jacob Erlbeck | 005ee7f | 2015-03-20 14:53:54 +0100 | [diff] [blame] | 1234 | |
Max | 9dabfa2 | 2017-05-16 16:10:45 +0200 | [diff] [blame] | 1235 | static inline int frames_since_last(int32_t last, unsigned fn) |
Jacob Erlbeck | 005ee7f | 2015-03-20 14:53:54 +0100 | [diff] [blame] | 1236 | { |
Max | 9dabfa2 | 2017-05-16 16:10:45 +0200 | [diff] [blame] | 1237 | unsigned wrapped = (fn + GSM_MAX_FN - last) % GSM_MAX_FN; |
| 1238 | |
| 1239 | if (last < 0) |
Jacob Erlbeck | 005ee7f | 2015-03-20 14:53:54 +0100 | [diff] [blame] | 1240 | return -1; |
| 1241 | |
Max | 9dabfa2 | 2017-05-16 16:10:45 +0200 | [diff] [blame] | 1242 | if (wrapped < GSM_MAX_FN/2) |
Jacob Erlbeck | 005ee7f | 2015-03-20 14:53:54 +0100 | [diff] [blame] | 1243 | return wrapped; |
Max | 9dabfa2 | 2017-05-16 16:10:45 +0200 | [diff] [blame] | 1244 | |
| 1245 | return wrapped - GSM_MAX_FN; |
| 1246 | } |
| 1247 | |
| 1248 | int gprs_rlcmac_dl_tbf::frames_since_last_poll(unsigned fn) const |
| 1249 | { |
| 1250 | return frames_since_last(m_last_dl_poll_fn, fn); |
Jacob Erlbeck | 005ee7f | 2015-03-20 14:53:54 +0100 | [diff] [blame] | 1251 | } |
| 1252 | |
Jacob Erlbeck | 3bed5d1 | 2015-03-19 11:22:38 +0100 | [diff] [blame] | 1253 | int gprs_rlcmac_dl_tbf::frames_since_last_drain(unsigned fn) const |
| 1254 | { |
Max | 9dabfa2 | 2017-05-16 16:10:45 +0200 | [diff] [blame] | 1255 | return frames_since_last(m_last_dl_drained_fn, fn); |
Jacob Erlbeck | 3bed5d1 | 2015-03-19 11:22:38 +0100 | [diff] [blame] | 1256 | } |
| 1257 | |
| 1258 | bool gprs_rlcmac_dl_tbf::keep_open(unsigned fn) const |
| 1259 | { |
| 1260 | int keep_time_frames; |
Pau Espin Pedrol | 2b5c629 | 2019-09-09 13:41:00 +0200 | [diff] [blame] | 1261 | unsigned long dl_tbf_idle_msec; |
Jacob Erlbeck | 3bed5d1 | 2015-03-19 11:22:38 +0100 | [diff] [blame] | 1262 | |
Pau Espin Pedrol | 2b5c629 | 2019-09-09 13:41:00 +0200 | [diff] [blame] | 1263 | dl_tbf_idle_msec = osmo_tdef_get(bts_data()->T_defs_pcu, -2031, OSMO_TDEF_MS, -1); |
| 1264 | if (dl_tbf_idle_msec == 0) |
Jacob Erlbeck | 3bed5d1 | 2015-03-19 11:22:38 +0100 | [diff] [blame] | 1265 | return false; |
| 1266 | |
Pau Espin Pedrol | 2b5c629 | 2019-09-09 13:41:00 +0200 | [diff] [blame] | 1267 | keep_time_frames = msecs_to_frames(dl_tbf_idle_msec); |
Jacob Erlbeck | 3bed5d1 | 2015-03-19 11:22:38 +0100 | [diff] [blame] | 1268 | return frames_since_last_drain(fn) <= keep_time_frames; |
| 1269 | } |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 1270 | |
| 1271 | /* |
| 1272 | * This function returns the pointer to data which needs |
| 1273 | * to be copied. Also updates the status of the block related to |
| 1274 | * Split block handling in the RLC/MAC block. |
| 1275 | */ |
| 1276 | enum egprs_rlc_dl_reseg_bsn_state |
| 1277 | gprs_rlcmac_dl_tbf::egprs_dl_get_data(int bsn, uint8_t **block_data) |
| 1278 | { |
| 1279 | gprs_rlc_data *rlc_data = m_rlc.block(bsn); |
| 1280 | egprs_rlc_dl_reseg_bsn_state *block_status_dl = |
| 1281 | &rlc_data->spb_status.block_status_dl; |
| 1282 | |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 1283 | enum CodingScheme cs_init = rlc_data->cs_init; |
| 1284 | enum CodingScheme cs_current_trans = rlc_data->cs_current_trans; |
Max | d4a3929 | 2019-03-13 18:44:20 +0100 | [diff] [blame] | 1285 | |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 1286 | enum HeaderType ht_cs_init = mcs_header_type(rlc_data->cs_init); |
| 1287 | enum HeaderType ht_cs_current_trans = mcs_header_type(rlc_data->cs_current_trans); |
Max | d4a3929 | 2019-03-13 18:44:20 +0100 | [diff] [blame] | 1288 | |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 1289 | *block_data = &rlc_data->block[0]; |
| 1290 | |
| 1291 | /* |
| 1292 | * Table 10.3a.0.1 of 44.060 |
| 1293 | * MCS6,9: second segment starts at 74/2 = 37 |
| 1294 | * MCS5,7: second segment starts at 56/2 = 28 |
| 1295 | * MCS8: second segment starts at 31 |
| 1296 | * MCS4: second segment starts at 44/2 = 22 |
| 1297 | */ |
Max | d4a3929 | 2019-03-13 18:44:20 +0100 | [diff] [blame] | 1298 | if (ht_cs_current_trans == HEADER_EGPRS_DATA_TYPE_3) { |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 1299 | if (*block_status_dl == EGPRS_RESEG_FIRST_SEG_SENT) { |
Max | d4a3929 | 2019-03-13 18:44:20 +0100 | [diff] [blame] | 1300 | switch (cs_init) { |
Max | bea2edb | 2019-03-06 17:04:59 +0100 | [diff] [blame] | 1301 | case MCS6 : |
| 1302 | case MCS9 : |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 1303 | *block_data = &rlc_data->block[37]; |
| 1304 | break; |
Max | bea2edb | 2019-03-06 17:04:59 +0100 | [diff] [blame] | 1305 | case MCS7 : |
| 1306 | case MCS5 : |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 1307 | *block_data = &rlc_data->block[28]; |
| 1308 | break; |
Max | bea2edb | 2019-03-06 17:04:59 +0100 | [diff] [blame] | 1309 | case MCS8 : |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 1310 | *block_data = &rlc_data->block[31]; |
| 1311 | break; |
Max | bea2edb | 2019-03-06 17:04:59 +0100 | [diff] [blame] | 1312 | case MCS4 : |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 1313 | *block_data = &rlc_data->block[22]; |
| 1314 | break; |
| 1315 | default: |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 1316 | LOGPTBFDL(this, LOGL_ERROR, |
| 1317 | "FIXME: Software error: hit invalid condition. " |
| 1318 | "headerType(%d) blockstatus(%d) cs(%s) PLEASE FIX!\n", |
Max | d4a3929 | 2019-03-13 18:44:20 +0100 | [diff] [blame] | 1319 | ht_cs_current_trans, |
Max | 136ebcc | 2019-03-05 14:59:03 +0100 | [diff] [blame] | 1320 | *block_status_dl, mcs_name(cs_init)); |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 1321 | break; |
| 1322 | |
| 1323 | } |
| 1324 | return EGPRS_RESEG_SECOND_SEG_SENT; |
Max | d4a3929 | 2019-03-13 18:44:20 +0100 | [diff] [blame] | 1325 | } else if ((ht_cs_init == HEADER_EGPRS_DATA_TYPE_1) || |
| 1326 | (ht_cs_init == HEADER_EGPRS_DATA_TYPE_2)) { |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 1327 | return EGPRS_RESEG_FIRST_SEG_SENT; |
Max | d4a3929 | 2019-03-13 18:44:20 +0100 | [diff] [blame] | 1328 | } else if ((cs_init == MCS4) && |
| 1329 | (cs_current_trans == MCS1)) { |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 1330 | return EGPRS_RESEG_FIRST_SEG_SENT; |
| 1331 | } |
| 1332 | } |
| 1333 | return EGPRS_RESEG_DL_DEFAULT; |
| 1334 | } |
| 1335 | |
| 1336 | /* |
| 1337 | * This function returns the status of split block |
| 1338 | * for RLC/MAC block. |
| 1339 | */ |
| 1340 | unsigned int gprs_rlcmac_dl_tbf::get_egprs_dl_spb_status(const int bsn) |
| 1341 | { |
| 1342 | const gprs_rlc_data *rlc_data = m_rlc.block(bsn); |
| 1343 | |
| 1344 | return rlc_data->spb_status.block_status_dl; |
| 1345 | } |
| 1346 | |
| 1347 | /* |
| 1348 | * This function returns the spb value to be sent OTA |
| 1349 | * for RLC/MAC block. |
| 1350 | */ |
| 1351 | enum egprs_rlcmac_dl_spb gprs_rlcmac_dl_tbf::get_egprs_dl_spb(const int bsn) |
| 1352 | { |
| 1353 | struct gprs_rlc_data *rlc_data = m_rlc.block(bsn); |
Max | d4a3929 | 2019-03-13 18:44:20 +0100 | [diff] [blame] | 1354 | egprs_rlc_dl_reseg_bsn_state block_status_dl = rlc_data->spb_status.block_status_dl; |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 1355 | |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 1356 | enum CodingScheme cs_init = rlc_data->cs_init; |
| 1357 | enum CodingScheme cs_current_trans = rlc_data->cs_current_trans; |
Max | d4a3929 | 2019-03-13 18:44:20 +0100 | [diff] [blame] | 1358 | |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 1359 | enum HeaderType ht_cs_init = mcs_header_type(rlc_data->cs_init); |
| 1360 | enum HeaderType ht_cs_current_trans = mcs_header_type(rlc_data->cs_current_trans); |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 1361 | |
| 1362 | /* Table 10.4.8b.1 of 44.060 */ |
Max | d4a3929 | 2019-03-13 18:44:20 +0100 | [diff] [blame] | 1363 | if (ht_cs_current_trans == HEADER_EGPRS_DATA_TYPE_3) { |
| 1364 | /* |
| 1365 | * if we are sending the second segment the spb should be 3 |
| 1366 | * otherwise it should be 2 |
| 1367 | */ |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 1368 | if (block_status_dl == EGPRS_RESEG_FIRST_SEG_SENT) { |
sivasankari | da7250a | 2016-12-16 12:57:18 +0530 | [diff] [blame] | 1369 | /* statistics */ |
Pau Espin Pedrol | 2338e53 | 2020-05-12 20:54:35 +0200 | [diff] [blame] | 1370 | bts->do_rate_ctr_inc(CTR_SPB_DL_SECOND_SEGMENT); |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 1371 | return EGPRS_RLCMAC_DL_SEC_SEG; |
Max | d4a3929 | 2019-03-13 18:44:20 +0100 | [diff] [blame] | 1372 | } else if ((ht_cs_init == HEADER_EGPRS_DATA_TYPE_1) || |
| 1373 | (ht_cs_init == HEADER_EGPRS_DATA_TYPE_2)) { |
Pau Espin Pedrol | 2338e53 | 2020-05-12 20:54:35 +0200 | [diff] [blame] | 1374 | bts->do_rate_ctr_inc(CTR_SPB_DL_FIRST_SEGMENT); |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 1375 | return EGPRS_RLCMAC_DL_FIRST_SEG; |
Max | d4a3929 | 2019-03-13 18:44:20 +0100 | [diff] [blame] | 1376 | } else if ((cs_init == MCS4) && |
| 1377 | (cs_current_trans == MCS1)) { |
Pau Espin Pedrol | 2338e53 | 2020-05-12 20:54:35 +0200 | [diff] [blame] | 1378 | bts->do_rate_ctr_inc(CTR_SPB_DL_FIRST_SEGMENT); |
Aravind Sirsikar | 50b0970 | 2016-08-22 17:21:10 +0530 | [diff] [blame] | 1379 | return EGPRS_RLCMAC_DL_FIRST_SEG; |
| 1380 | } |
| 1381 | } |
| 1382 | /* Non SPB cases 0 is reurned */ |
| 1383 | return EGPRS_RLCMAC_DL_NO_RETX; |
| 1384 | } |
Aravind Sirsikar | 8e70bb5 | 2016-09-15 17:51:16 +0530 | [diff] [blame] | 1385 | |
Max | 9d7357e | 2017-12-14 15:02:33 +0100 | [diff] [blame] | 1386 | void gprs_rlcmac_dl_tbf::set_window_size() |
Aravind Sirsikar | 8e70bb5 | 2016-09-15 17:51:16 +0530 | [diff] [blame] | 1387 | { |
Max | 34513fe | 2018-12-11 16:47:30 +0100 | [diff] [blame] | 1388 | const struct gprs_rlcmac_bts *b = bts->bts_data(); |
| 1389 | uint16_t ws = egprs_window_size(b, dl_slots()); |
| 1390 | |
Max | 0524e38 | 2018-01-19 18:22:25 +0100 | [diff] [blame] | 1391 | LOGPTBFDL(this, LOGL_INFO, "setting EGPRS DL window size to %u, base(%u) slots(%u) ws_pdch(%u)\n", |
Max | 34513fe | 2018-12-11 16:47:30 +0100 | [diff] [blame] | 1392 | ws, b->ws_base, pcu_bitcount(dl_slots()), b->ws_pdch); |
Aravind Sirsikar | 8e70bb5 | 2016-09-15 17:51:16 +0530 | [diff] [blame] | 1393 | m_window.set_ws(ws); |
| 1394 | } |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 1395 | |
Max | fb59a93 | 2019-03-13 18:40:19 +0100 | [diff] [blame] | 1396 | void gprs_rlcmac_dl_tbf::update_coding_scheme_counter_dl(enum CodingScheme cs) |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 1397 | { |
Max | fb59a93 | 2019-03-13 18:40:19 +0100 | [diff] [blame] | 1398 | switch (cs) { |
| 1399 | case CS1: |
Pau Espin Pedrol | 2338e53 | 2020-05-12 20:54:35 +0200 | [diff] [blame] | 1400 | bts->do_rate_ctr_inc(CTR_GPRS_DL_CS1); |
Max | fb59a93 | 2019-03-13 18:40:19 +0100 | [diff] [blame] | 1401 | rate_ctr_inc(&m_dl_gprs_ctrs->ctr[TBF_CTR_GPRS_DL_CS1]); |
| 1402 | break; |
| 1403 | case CS2: |
Pau Espin Pedrol | 2338e53 | 2020-05-12 20:54:35 +0200 | [diff] [blame] | 1404 | bts->do_rate_ctr_inc(CTR_GPRS_DL_CS2); |
Max | fb59a93 | 2019-03-13 18:40:19 +0100 | [diff] [blame] | 1405 | rate_ctr_inc(&m_dl_gprs_ctrs->ctr[TBF_CTR_GPRS_DL_CS2]); |
| 1406 | break; |
| 1407 | case CS3: |
Pau Espin Pedrol | 2338e53 | 2020-05-12 20:54:35 +0200 | [diff] [blame] | 1408 | bts->do_rate_ctr_inc(CTR_GPRS_DL_CS3); |
Max | fb59a93 | 2019-03-13 18:40:19 +0100 | [diff] [blame] | 1409 | rate_ctr_inc(&m_dl_gprs_ctrs->ctr[TBF_CTR_GPRS_DL_CS3]); |
| 1410 | break; |
| 1411 | case CS4: |
Pau Espin Pedrol | 2338e53 | 2020-05-12 20:54:35 +0200 | [diff] [blame] | 1412 | bts->do_rate_ctr_inc(CTR_GPRS_DL_CS4); |
Max | fb59a93 | 2019-03-13 18:40:19 +0100 | [diff] [blame] | 1413 | rate_ctr_inc(&m_dl_gprs_ctrs->ctr[TBF_CTR_GPRS_DL_CS4]); |
| 1414 | break; |
| 1415 | case MCS1: |
Pau Espin Pedrol | 2338e53 | 2020-05-12 20:54:35 +0200 | [diff] [blame] | 1416 | bts->do_rate_ctr_inc(CTR_EGPRS_DL_MCS1); |
Max | fb59a93 | 2019-03-13 18:40:19 +0100 | [diff] [blame] | 1417 | rate_ctr_inc(&m_dl_egprs_ctrs->ctr[TBF_CTR_EGPRS_DL_MCS1]); |
| 1418 | break; |
| 1419 | case MCS2: |
Pau Espin Pedrol | 2338e53 | 2020-05-12 20:54:35 +0200 | [diff] [blame] | 1420 | bts->do_rate_ctr_inc(CTR_EGPRS_DL_MCS2); |
Max | fb59a93 | 2019-03-13 18:40:19 +0100 | [diff] [blame] | 1421 | rate_ctr_inc(&m_dl_egprs_ctrs->ctr[TBF_CTR_EGPRS_DL_MCS2]); |
| 1422 | break; |
| 1423 | case MCS3: |
Pau Espin Pedrol | 2338e53 | 2020-05-12 20:54:35 +0200 | [diff] [blame] | 1424 | bts->do_rate_ctr_inc(CTR_EGPRS_DL_MCS3); |
Max | fb59a93 | 2019-03-13 18:40:19 +0100 | [diff] [blame] | 1425 | rate_ctr_inc(&m_dl_egprs_ctrs->ctr[TBF_CTR_EGPRS_DL_MCS3]); |
| 1426 | break; |
| 1427 | case MCS4: |
Pau Espin Pedrol | 2338e53 | 2020-05-12 20:54:35 +0200 | [diff] [blame] | 1428 | bts->do_rate_ctr_inc(CTR_EGPRS_DL_MCS4); |
Max | fb59a93 | 2019-03-13 18:40:19 +0100 | [diff] [blame] | 1429 | rate_ctr_inc(&m_dl_egprs_ctrs->ctr[TBF_CTR_EGPRS_DL_MCS4]); |
| 1430 | break; |
| 1431 | case MCS5: |
Pau Espin Pedrol | 2338e53 | 2020-05-12 20:54:35 +0200 | [diff] [blame] | 1432 | bts->do_rate_ctr_inc(CTR_EGPRS_DL_MCS5); |
Max | fb59a93 | 2019-03-13 18:40:19 +0100 | [diff] [blame] | 1433 | rate_ctr_inc(&m_dl_egprs_ctrs->ctr[TBF_CTR_EGPRS_DL_MCS5]); |
| 1434 | break; |
| 1435 | case MCS6: |
Pau Espin Pedrol | 2338e53 | 2020-05-12 20:54:35 +0200 | [diff] [blame] | 1436 | bts->do_rate_ctr_inc(CTR_EGPRS_DL_MCS6); |
Max | fb59a93 | 2019-03-13 18:40:19 +0100 | [diff] [blame] | 1437 | rate_ctr_inc(&m_dl_egprs_ctrs->ctr[TBF_CTR_EGPRS_DL_MCS6]); |
| 1438 | break; |
| 1439 | case MCS7: |
Pau Espin Pedrol | 2338e53 | 2020-05-12 20:54:35 +0200 | [diff] [blame] | 1440 | bts->do_rate_ctr_inc(CTR_EGPRS_DL_MCS7); |
Max | fb59a93 | 2019-03-13 18:40:19 +0100 | [diff] [blame] | 1441 | rate_ctr_inc(&m_dl_egprs_ctrs->ctr[TBF_CTR_EGPRS_DL_MCS7]); |
| 1442 | break; |
| 1443 | case MCS8: |
Pau Espin Pedrol | 2338e53 | 2020-05-12 20:54:35 +0200 | [diff] [blame] | 1444 | bts->do_rate_ctr_inc(CTR_EGPRS_DL_MCS8); |
Max | fb59a93 | 2019-03-13 18:40:19 +0100 | [diff] [blame] | 1445 | rate_ctr_inc(&m_dl_egprs_ctrs->ctr[TBF_CTR_EGPRS_DL_MCS8]); |
| 1446 | break; |
| 1447 | case MCS9: |
Pau Espin Pedrol | 2338e53 | 2020-05-12 20:54:35 +0200 | [diff] [blame] | 1448 | bts->do_rate_ctr_inc(CTR_EGPRS_DL_MCS9); |
Max | fb59a93 | 2019-03-13 18:40:19 +0100 | [diff] [blame] | 1449 | rate_ctr_inc(&m_dl_egprs_ctrs->ctr[TBF_CTR_EGPRS_DL_MCS9]); |
| 1450 | break; |
| 1451 | default: |
| 1452 | LOGPTBFDL(this, LOGL_ERROR, "attempting to update rate counters for unsupported (M)CS %s\n", |
| 1453 | mcs_name(cs)); |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 1454 | } |
| 1455 | } |