Holger Hans Peter Freyther | b6acfda | 2013-10-17 19:41:11 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 by Holger Hans Peter Freyther |
| 3 | * |
| 4 | * All Rights Reserved |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU Affero General Public License as published by |
| 8 | * the Free Software Foundation; either version 3 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Affero General Public License |
| 17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 18 | * |
| 19 | */ |
| 20 | |
| 21 | #include <bts.h> |
Holger Hans Peter Freyther | b78adcd | 2013-10-17 20:12:37 +0200 | [diff] [blame] | 22 | #include <poll_controller.h> |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 23 | #include <tbf.h> |
Pau Espin Pedrol | 9d1cdb1 | 2019-09-25 17:47:02 +0200 | [diff] [blame] | 24 | #include <tbf_ul.h> |
Holger Hans Peter Freyther | 63f29d6 | 2013-10-19 19:04:03 +0200 | [diff] [blame] | 25 | #include <encoding.h> |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 26 | #include <decoding.h> |
| 27 | #include <rlc.h> |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 28 | #include <pcu_l1_if.h> |
Max | 1187a77 | 2018-01-26 13:31:42 +0100 | [diff] [blame] | 29 | #include <gprs_ms.h> |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 30 | #include <gprs_rlcmac.h> |
Holger Hans Peter Freyther | 24e98d0 | 2013-10-19 18:15:44 +0200 | [diff] [blame] | 31 | #include <gprs_debug.h> |
Max | 1187a77 | 2018-01-26 13:31:42 +0100 | [diff] [blame] | 32 | #include <cxx_linuxlist.h> |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 33 | #include <pdch.h> |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 34 | |
| 35 | extern "C" { |
| 36 | #include <osmocom/core/talloc.h> |
Holger Hans Peter Freyther | 24e98d0 | 2013-10-19 18:15:44 +0200 | [diff] [blame] | 37 | #include <osmocom/core/msgb.h> |
Holger Hans Peter Freyther | 8df447d | 2015-11-07 21:04:40 +0100 | [diff] [blame] | 38 | #include <osmocom/core/stats.h> |
Max | 9bbe160 | 2016-07-18 12:50:18 +0200 | [diff] [blame] | 39 | #include <osmocom/gsm/protocol/gsm_04_08.h> |
Philipp Maier | 1275a3f | 2017-02-21 19:35:23 +0100 | [diff] [blame] | 40 | #include <osmocom/gsm/gsm_utils.h> |
Pau Espin Pedrol | fbfab29 | 2019-12-23 13:19:25 +0100 | [diff] [blame] | 41 | #include <osmocom/gsm/gsm48.h> |
Harald Welte | 717cdf5 | 2017-07-21 21:56:23 +0200 | [diff] [blame] | 42 | #include <osmocom/core/gsmtap_util.h> |
Harald Welte | 3e51d3e | 2017-10-29 10:57:27 +0100 | [diff] [blame] | 43 | #include <osmocom/core/application.h> |
Max | 1187a77 | 2018-01-26 13:31:42 +0100 | [diff] [blame] | 44 | #include <osmocom/core/bitvec.h> |
| 45 | #include <osmocom/core/gsmtap.h> |
| 46 | #include <osmocom/core/logging.h> |
| 47 | #include <osmocom/core/utils.h> |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 48 | } |
Holger Hans Peter Freyther | b78adcd | 2013-10-17 20:12:37 +0200 | [diff] [blame] | 49 | |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 50 | #include <errno.h> |
Holger Hans Peter Freyther | b6acfda | 2013-10-17 19:41:11 +0200 | [diff] [blame] | 51 | #include <string.h> |
| 52 | |
Philipp Maier | 1275a3f | 2017-02-21 19:35:23 +0100 | [diff] [blame] | 53 | #define RFN_MODULUS 42432 |
| 54 | #define RFN_THRESHOLD RFN_MODULUS / 2 |
| 55 | |
Holger Hans Peter Freyther | 24e98d0 | 2013-10-19 18:15:44 +0200 | [diff] [blame] | 56 | extern void *tall_pcu_ctx; |
| 57 | |
Harald Welte | 3e51d3e | 2017-10-29 10:57:27 +0100 | [diff] [blame] | 58 | extern "C" { |
| 59 | /* e must make sure to initialize logging before the BTS static |
| 60 | * constructors are executed below, as those call libosmocore APIs that |
| 61 | * require logging already to be initialized. */ |
| 62 | __attribute__((constructor)) static void early_init(void) |
| 63 | { |
Neels Hofmeyr | 42f2d61 | 2018-04-01 16:54:40 +0200 | [diff] [blame] | 64 | if (!tall_pcu_ctx) { |
| 65 | tall_pcu_ctx = talloc_named_const(NULL, 1, "Osmo-PCU context"); |
| 66 | osmo_init_logging2(tall_pcu_ctx, &gprs_log_info); |
| 67 | } |
Harald Welte | 3e51d3e | 2017-10-29 10:57:27 +0100 | [diff] [blame] | 68 | } |
| 69 | } |
| 70 | |
Holger Hans Peter Freyther | b6acfda | 2013-10-17 19:41:11 +0200 | [diff] [blame] | 71 | static BTS s_bts; |
| 72 | |
Pau Espin Pedrol | 28f160e | 2019-09-05 14:48:35 +0200 | [diff] [blame] | 73 | static struct osmo_tdef T_defs_bts[] = { |
| 74 | { .T=3142, .default_val=20, .unit=OSMO_TDEF_S, .desc="timer (s)", .val=0 }, |
| 75 | { .T=3169, .default_val=5, .unit=OSMO_TDEF_S, .desc="Reuse of USF and TFI(s) after the MS uplink TBF assignment is invalid (s)", .val=0 }, |
| 76 | { .T=3191, .default_val=5, .unit=OSMO_TDEF_S, .desc="Reuse of TFI(s) after sending (1) last RLC Data Block on TBF(s), or (2) PACKET TBF RELEASE for an MBMS radio bearer (s)", .val=0 }, |
| 77 | { .T=3193, .default_val=100, .unit=OSMO_TDEF_MS, .desc="Reuse of TFI(s) after reception of final PACKET DOWNLINK ACK/NACK from MS for TBF (ms)", .val=0 }, |
| 78 | { .T=3195, .default_val=5, .unit=OSMO_TDEF_S, .desc="Reuse of TFI(s) upon no response from the MS (radio failure or cell change) for TBF/MBMS radio bearer (s)", .val=0 }, |
Pau Espin Pedrol | 5360ef5 | 2019-09-13 12:41:54 +0200 | [diff] [blame] | 79 | { .T=0, .default_val=0, .unit=OSMO_TDEF_S, .desc=NULL, .val=0 } /* empty item at the end */ |
Pau Espin Pedrol | 28f160e | 2019-09-05 14:48:35 +0200 | [diff] [blame] | 80 | }; |
| 81 | static struct osmo_tdef T_defs_pcu[] = { |
Pau Espin Pedrol | 5211d9d | 2019-09-05 16:20:22 +0200 | [diff] [blame] | 82 | { .T=1, .default_val=30, .unit=OSMO_TDEF_S, .desc="BSSGP (un)blocking procedures timer (s)", .val=0 }, |
| 83 | { .T=2, .default_val=30, .unit=OSMO_TDEF_S, .desc="BSSGP reset procedure timer (s)", .val=0 }, |
Pau Espin Pedrol | 38cfa73 | 2019-09-09 12:55:01 +0200 | [diff] [blame] | 84 | { .T=3190, .default_val=5, .unit=OSMO_TDEF_S, .desc="Return to packet idle mode after Packet DL Assignment on CCCH (s)", .val=0}, |
Pau Espin Pedrol | 28f160e | 2019-09-05 14:48:35 +0200 | [diff] [blame] | 85 | { .T=-2000, .default_val=2, .unit=OSMO_TDEF_MS, .desc="Tbf reject for PRR timer (ms)", .val=0 }, |
| 86 | { .T=-2001, .default_val=2, .unit=OSMO_TDEF_S, .desc="PACCH assignment timer (s)", .val=0 }, |
| 87 | { .T=-2002, .default_val=200, .unit=OSMO_TDEF_MS, .desc="Waiting after IMM.ASS confirm timer (ms)", .val=0 }, |
Pau Espin Pedrol | 63700ea | 2019-09-09 13:19:06 +0200 | [diff] [blame] | 88 | { .T=-2030, .default_val=60, .unit=OSMO_TDEF_S, .desc="Time to keep an idle MS object alive (s)", .val=0 }, /* slightly above T3314 (default 44s, 24.008, 11.2.2) */ |
Pau Espin Pedrol | 2b5c629 | 2019-09-09 13:41:00 +0200 | [diff] [blame] | 89 | { .T=-2031, .default_val=2000, .unit=OSMO_TDEF_MS, .desc="Time to keep an idle DL TBF alive (ms)", .val=0 }, |
Pau Espin Pedrol | 5360ef5 | 2019-09-13 12:41:54 +0200 | [diff] [blame] | 90 | { .T=0, .default_val=0, .unit=OSMO_TDEF_S, .desc=NULL, .val=0 } /* empty item at the end */ |
Pau Espin Pedrol | 28f160e | 2019-09-05 14:48:35 +0200 | [diff] [blame] | 91 | }; |
| 92 | |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 93 | /** |
| 94 | * For gcc-4.4 compat do not use extended initializer list but keep the |
| 95 | * order from the enum here. Once we support GCC4.7 and up we can change |
| 96 | * the code below. |
| 97 | */ |
| 98 | static const struct rate_ctr_desc bts_ctr_description[] = { |
Max | a5eb67d | 2017-11-21 20:24:54 +0100 | [diff] [blame] | 99 | { "tbf:dl:alloc", "TBF DL Allocated "}, |
| 100 | { "tbf:dl:freed", "TBF DL Freed "}, |
| 101 | { "tbf:dl:aborted", "TBF DL Aborted "}, |
| 102 | { "tbf:ul:alloc", "TBF UL Allocated "}, |
| 103 | { "tbf:ul:freed", "TBF UL Freed "}, |
| 104 | { "tbf:ul:aborted", "TBF UL Aborted "}, |
| 105 | { "tbf:reused", "TBF Reused "}, |
| 106 | { "tbf:alloc:algo-a", "TBF Alloc Algo A "}, |
| 107 | { "tbf:alloc:algo-b", "TBF Alloc Algo B "}, |
| 108 | { "tbf:failed:egprs-only", "TBF Failed EGPRS-only"}, |
| 109 | { "rlc:sent", "RLC Sent "}, |
| 110 | { "rlc:resent", "RLC Resent "}, |
| 111 | { "rlc:restarted", "RLC Restarted "}, |
| 112 | { "rlc:stalled", "RLC Stalled "}, |
| 113 | { "rlc:nacked", "RLC Nacked "}, |
| 114 | { "rlc:final_block_resent", "RLC Final Blk resent "}, |
| 115 | { "rlc:ass:timedout", "RLC Assign Timeout "}, |
| 116 | { "rlc:ass:failed", "RLC Assign Failed "}, |
| 117 | { "rlc:ack:timedout", "RLC Ack Timeout "}, |
| 118 | { "rlc:ack:failed", "RLC Ack Failed "}, |
| 119 | { "rlc:rel:timedout", "RLC Release Timeout "}, |
| 120 | { "rlc:late-block", "RLC Late Block "}, |
| 121 | { "rlc:sent-dummy", "RLC Sent Dummy "}, |
| 122 | { "rlc:sent-control", "RLC Sent Control "}, |
| 123 | { "rlc:dl_bytes", "RLC DL Bytes "}, |
| 124 | { "rlc:dl_payload_bytes", "RLC DL Payload Bytes "}, |
| 125 | { "rlc:ul_bytes", "RLC UL Bytes "}, |
| 126 | { "rlc:ul_payload_bytes", "RLC UL Payload Bytes "}, |
| 127 | { "decode:errors", "Decode Errors "}, |
| 128 | { "sba:allocated", "SBA Allocated "}, |
| 129 | { "sba:freed", "SBA Freed "}, |
| 130 | { "sba:timedout", "SBA Timeout "}, |
| 131 | { "llc:timeout", "Timedout Frames "}, |
| 132 | { "llc:dropped", "Dropped Frames "}, |
| 133 | { "llc:scheduled", "Scheduled Frames "}, |
| 134 | { "llc:dl_bytes", "RLC encapsulated PDUs"}, |
| 135 | { "llc:ul_bytes", "full PDUs received "}, |
| 136 | { "rach:requests", "RACH requests "}, |
| 137 | { "11bit_rach:requests", "11BIT_RACH requests "}, |
| 138 | { "spb:uplink_first_segment", "First seg of UL SPB "}, |
| 139 | { "spb:uplink_second_segment", "Second seg of UL SPB "}, |
| 140 | { "spb:downlink_first_segment", "First seg of DL SPB "}, |
| 141 | { "spb:downlink_second_segment","Second seg of DL SPB "}, |
| 142 | { "immediate:assignment_UL", "Immediate Assign UL "}, |
| 143 | { "immediate:assignment_rej", "Immediate Assign Rej "}, |
| 144 | { "immediate:assignment_DL", "Immediate Assign DL "}, |
| 145 | { "channel:request_description","Channel Request Desc "}, |
| 146 | { "pkt:ul_assignment", "Packet UL Assignment "}, |
| 147 | { "pkt:access_reject", "Packet Access Reject "}, |
| 148 | { "pkt:dl_assignment", "Packet DL Assignment "}, |
| 149 | { "ul:control", "UL control Block "}, |
| 150 | { "ul:assignment_poll_timeout", "UL Assign Timeout "}, |
| 151 | { "ul:assignment_failed", "UL Assign Failed "}, |
| 152 | { "dl:assignment_timeout", "DL Assign Timeout "}, |
| 153 | { "dl:assignment_failed", "DL Assign Failed "}, |
| 154 | { "pkt:ul_ack_nack_timeout", "PUAN Poll Timeout "}, |
| 155 | { "pkt:ul_ack_nack_failed", "PUAN poll Failed "}, |
| 156 | { "pkt:dl_ack_nack_timeout", "PDAN poll Timeout "}, |
| 157 | { "pkt:dl_ack_nack_failed", "PDAN poll Failed "}, |
| 158 | { "gprs:downlink_cs1", "CS1 downlink "}, |
| 159 | { "gprs:downlink_cs2", "CS2 downlink "}, |
| 160 | { "gprs:downlink_cs3", "CS3 downlink "}, |
| 161 | { "gprs:downlink_cs4", "CS4 downlink "}, |
| 162 | { "egprs:downlink_mcs1", "MCS1 downlink "}, |
| 163 | { "egprs:downlink_mcs2", "MCS2 downlink "}, |
| 164 | { "egprs:downlink_mcs3", "MCS3 downlink "}, |
| 165 | { "egprs:downlink_mcs4", "MCS4 downlink "}, |
| 166 | { "egprs:downlink_mcs5", "MCS5 downlink "}, |
| 167 | { "egprs:downlink_mcs6", "MCS6 downlink "}, |
| 168 | { "egprs:downlink_mcs7", "MCS7 downlink "}, |
| 169 | { "egprs:downlink_mcs8", "MCS8 downlink "}, |
| 170 | { "egprs:downlink_mcs9", "MCS9 downlink "}, |
| 171 | { "gprs:uplink_cs1", "CS1 Uplink "}, |
| 172 | { "gprs:uplink_cs2", "CS2 Uplink "}, |
| 173 | { "gprs:uplink_cs3", "CS3 Uplink "}, |
| 174 | { "gprs:uplink_cs4", "CS4 Uplink "}, |
| 175 | { "egprs:uplink_mcs1", "MCS1 Uplink "}, |
| 176 | { "egprs:uplink_mcs2", "MCS2 Uplink "}, |
| 177 | { "egprs:uplink_mcs3", "MCS3 Uplink "}, |
| 178 | { "egprs:uplink_mcs4", "MCS4 Uplink "}, |
| 179 | { "egprs:uplink_mcs5", "MCS5 Uplink "}, |
| 180 | { "egprs:uplink_mcs6", "MCS6 Uplink "}, |
| 181 | { "egprs:uplink_mcs7", "MCS7 Uplink "}, |
| 182 | { "egprs:uplink_mcs8", "MCS8 Uplink "}, |
| 183 | { "egprs:uplink_mcs9", "MCS9 Uplink "}, |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 184 | }; |
| 185 | |
| 186 | static const struct rate_ctr_group_desc bts_ctrg_desc = { |
| 187 | "bts", |
| 188 | "BTS Statistics", |
Holger Hans Peter Freyther | b8a5426 | 2015-11-07 21:00:00 +0100 | [diff] [blame] | 189 | OSMO_STATS_CLASS_GLOBAL, |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 190 | ARRAY_SIZE(bts_ctr_description), |
| 191 | bts_ctr_description, |
| 192 | }; |
| 193 | |
Jacob Erlbeck | f5898a0 | 2015-11-27 19:05:13 +0100 | [diff] [blame] | 194 | static const struct osmo_stat_item_desc bts_stat_item_description[] = { |
| 195 | { "ms.present", "MS Present ", |
| 196 | OSMO_STAT_ITEM_NO_UNIT, 4, 0}, |
| 197 | }; |
| 198 | |
| 199 | static const struct osmo_stat_item_group_desc bts_statg_desc = { |
| 200 | "bts", |
| 201 | "BTS Statistics", |
| 202 | OSMO_STATS_CLASS_GLOBAL, |
| 203 | ARRAY_SIZE(bts_stat_item_description), |
| 204 | bts_stat_item_description, |
| 205 | }; |
| 206 | |
Holger Hans Peter Freyther | b6acfda | 2013-10-17 19:41:11 +0200 | [diff] [blame] | 207 | BTS* BTS::main_bts() |
| 208 | { |
| 209 | return &s_bts; |
| 210 | } |
| 211 | |
| 212 | struct gprs_rlcmac_bts *BTS::bts_data() |
| 213 | { |
| 214 | return &m_bts; |
| 215 | } |
| 216 | |
| 217 | struct gprs_rlcmac_bts *bts_main_data() |
| 218 | { |
| 219 | return BTS::main_bts()->bts_data(); |
| 220 | } |
| 221 | |
Max | d5ffeb5 | 2019-03-18 15:48:38 +0100 | [diff] [blame] | 222 | void bts_cleanup() |
| 223 | { |
| 224 | return BTS::main_bts()->cleanup(); |
| 225 | } |
| 226 | |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 227 | struct rate_ctr_group *bts_main_data_stats() |
| 228 | { |
| 229 | return BTS::main_bts()->rate_counters(); |
| 230 | } |
| 231 | |
Holger Hans Peter Freyther | b6acfda | 2013-10-17 19:41:11 +0200 | [diff] [blame] | 232 | BTS::BTS() |
Holger Hans Peter Freyther | 9b30c7f | 2013-10-17 19:59:56 +0200 | [diff] [blame] | 233 | : m_cur_fn(0) |
Jacob Erlbeck | 60f7703 | 2015-08-24 14:35:14 +0200 | [diff] [blame] | 234 | , m_cur_blk_fn(-1) |
Holger Hans Peter Freyther | b78adcd | 2013-10-17 20:12:37 +0200 | [diff] [blame] | 235 | , m_pollController(*this) |
Holger Hans Peter Freyther | cedf890 | 2013-10-19 20:47:12 +0200 | [diff] [blame] | 236 | , m_sba(*this) |
Jacob Erlbeck | 17214bb | 2015-06-02 14:06:12 +0200 | [diff] [blame] | 237 | , m_ms_store(this) |
Holger Hans Peter Freyther | b6acfda | 2013-10-17 19:41:11 +0200 | [diff] [blame] | 238 | { |
| 239 | memset(&m_bts, 0, sizeof(m_bts)); |
| 240 | m_bts.bts = this; |
Oliver Smith | cfb6321 | 2019-09-05 17:13:33 +0200 | [diff] [blame] | 241 | m_bts.app_info = NULL; |
Oliver Smith | 45fdc44 | 2019-09-05 15:12:20 +0200 | [diff] [blame] | 242 | m_bts.dl_tbf_preemptive_retransmission = true; |
Pau Espin Pedrol | 28f160e | 2019-09-05 14:48:35 +0200 | [diff] [blame] | 243 | m_bts.T_defs_bts = T_defs_bts; |
| 244 | m_bts.T_defs_pcu = T_defs_pcu; |
| 245 | osmo_tdefs_reset(m_bts.T_defs_bts); |
| 246 | osmo_tdefs_reset(m_bts.T_defs_pcu); |
Holger Hans Peter Freyther | 4ed1dae | 2013-10-20 10:14:03 +0200 | [diff] [blame] | 247 | |
| 248 | /* initialize back pointers */ |
| 249 | for (size_t trx_no = 0; trx_no < ARRAY_SIZE(m_bts.trx); ++trx_no) { |
| 250 | struct gprs_rlcmac_trx *trx = &m_bts.trx[trx_no]; |
| 251 | trx->trx_no = trx_no; |
| 252 | trx->bts = this; |
| 253 | |
| 254 | for (size_t ts_no = 0; ts_no < ARRAY_SIZE(trx->pdch); ++ts_no) { |
| 255 | struct gprs_rlcmac_pdch *pdch = &trx->pdch[ts_no]; |
Vadim Yanitskiy | bd0dac3 | 2019-10-05 21:57:14 +0700 | [diff] [blame] | 256 | pdch->init_ptcch_msg(); |
Holger Hans Peter Freyther | 4ed1dae | 2013-10-20 10:14:03 +0200 | [diff] [blame] | 257 | pdch->ts_no = ts_no; |
| 258 | pdch->trx = trx; |
| 259 | } |
| 260 | } |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 261 | |
Max | ea9968f | 2017-12-18 22:52:52 +0100 | [diff] [blame] | 262 | /* The static allocator might have already registered the counter group. |
Max | 1714aea | 2017-12-21 11:19:39 +0100 | [diff] [blame] | 263 | If this happens and we still called explicitly (in tests/ for example) |
Max | ea9968f | 2017-12-18 22:52:52 +0100 | [diff] [blame] | 264 | than just allocate the group with different index. |
| 265 | This shall be removed once weget rid of BTS singleton */ |
| 266 | if (rate_ctr_get_group_by_name_idx(bts_ctrg_desc.group_name_prefix, 0)) |
| 267 | m_ratectrs = rate_ctr_group_alloc(tall_pcu_ctx, &bts_ctrg_desc, 1); |
| 268 | else |
| 269 | m_ratectrs = rate_ctr_group_alloc(tall_pcu_ctx, &bts_ctrg_desc, 0); |
Harald Welte | 9530a40 | 2017-07-12 00:46:36 +0200 | [diff] [blame] | 270 | OSMO_ASSERT(m_ratectrs); |
Max | ea9968f | 2017-12-18 22:52:52 +0100 | [diff] [blame] | 271 | |
Jacob Erlbeck | f5898a0 | 2015-11-27 19:05:13 +0100 | [diff] [blame] | 272 | m_statg = osmo_stat_item_group_alloc(tall_pcu_ctx, &bts_statg_desc, 0); |
Harald Welte | 9530a40 | 2017-07-12 00:46:36 +0200 | [diff] [blame] | 273 | OSMO_ASSERT(m_statg); |
Holger Hans Peter Freyther | b6acfda | 2013-10-17 19:41:11 +0200 | [diff] [blame] | 274 | } |
Holger Hans Peter Freyther | 9b30c7f | 2013-10-17 19:59:56 +0200 | [diff] [blame] | 275 | |
Max | d5ffeb5 | 2019-03-18 15:48:38 +0100 | [diff] [blame] | 276 | void BTS::cleanup() |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 277 | { |
Jacob Erlbeck | c362df2 | 2016-01-20 22:02:19 +0100 | [diff] [blame] | 278 | /* this can cause counter updates and must not be left to the |
| 279 | * m_ms_store's destructor */ |
| 280 | m_ms_store.cleanup(); |
| 281 | |
Max | d5ffeb5 | 2019-03-18 15:48:38 +0100 | [diff] [blame] | 282 | if (m_ratectrs) { |
| 283 | rate_ctr_group_free(m_ratectrs); |
| 284 | m_ratectrs = NULL; |
| 285 | } |
| 286 | |
| 287 | if (m_statg) { |
| 288 | osmo_stat_item_group_free(m_statg); |
| 289 | m_statg = NULL; |
| 290 | } |
Oliver Smith | cfb6321 | 2019-09-05 17:13:33 +0200 | [diff] [blame] | 291 | |
| 292 | if (m_bts.app_info) { |
| 293 | msgb_free(m_bts.app_info); |
| 294 | m_bts.app_info = NULL; |
| 295 | } |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 296 | } |
| 297 | |
Max | d5ffeb5 | 2019-03-18 15:48:38 +0100 | [diff] [blame] | 298 | BTS::~BTS() |
| 299 | { |
| 300 | cleanup(); |
| 301 | } |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 302 | |
Holger Hans Peter Freyther | 9b30c7f | 2013-10-17 19:59:56 +0200 | [diff] [blame] | 303 | void BTS::set_current_frame_number(int fn) |
| 304 | { |
Jacob Erlbeck | ac49d09 | 2015-08-27 13:18:24 +0200 | [diff] [blame] | 305 | /* The UL frame numbers lag 3 behind the DL frames and the data |
| 306 | * indication is only sent after all 4 frames of the block have been |
| 307 | * received. Sometimes there is an idle frame between the end of one |
| 308 | * and start of another frame (every 3 blocks). So the timeout should |
| 309 | * definitely be there if we're more than 8 frames past poll_fn. Let's |
Jacob Erlbeck | e77d49f | 2015-08-27 13:28:05 +0200 | [diff] [blame] | 310 | * stay on the safe side and say 13 or more. An additional delay can |
| 311 | * happen due to the block processing time in the DSP, so the delay of |
| 312 | * decoded blocks relative to the timing clock can be much larger. |
| 313 | * Values up to 50 frames have been observed under load. */ |
| 314 | const static int max_delay = 60; |
Jacob Erlbeck | ac49d09 | 2015-08-27 13:18:24 +0200 | [diff] [blame] | 315 | |
Holger Hans Peter Freyther | 9b30c7f | 2013-10-17 19:59:56 +0200 | [diff] [blame] | 316 | m_cur_fn = fn; |
Jacob Erlbeck | ac49d09 | 2015-08-27 13:18:24 +0200 | [diff] [blame] | 317 | m_pollController.expireTimedout(m_cur_fn, max_delay); |
Holger Hans Peter Freyther | 9b30c7f | 2013-10-17 19:59:56 +0200 | [diff] [blame] | 318 | } |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 319 | |
Max | 9dabfa2 | 2017-05-16 16:10:45 +0200 | [diff] [blame] | 320 | static inline int delta_fn(int fn, int to) |
| 321 | { |
| 322 | return (fn + GSM_MAX_FN * 3 / 2 - to) % GSM_MAX_FN - GSM_MAX_FN/2; |
| 323 | } |
| 324 | |
Jacob Erlbeck | af75ce8 | 2015-08-26 13:22:28 +0200 | [diff] [blame] | 325 | void BTS::set_current_block_frame_number(int fn, unsigned max_delay) |
Jacob Erlbeck | 60f7703 | 2015-08-24 14:35:14 +0200 | [diff] [blame] | 326 | { |
| 327 | int delay = 0; |
| 328 | const int late_block_delay_thresh = 13; |
| 329 | const int fn_update_ok_min_delay = -500; |
| 330 | const int fn_update_ok_max_delay = 0; |
| 331 | |
| 332 | /* frame numbers in the received blocks are assumed to be strongly |
| 333 | * monotonic. */ |
| 334 | if (m_cur_blk_fn >= 0) { |
Max | 9dabfa2 | 2017-05-16 16:10:45 +0200 | [diff] [blame] | 335 | int delta = delta_fn(fn, m_cur_blk_fn); |
Jacob Erlbeck | 60f7703 | 2015-08-24 14:35:14 +0200 | [diff] [blame] | 336 | if (delta <= 0) |
| 337 | return; |
| 338 | } |
| 339 | |
| 340 | /* Check block delay vs. the current frame number */ |
| 341 | if (current_frame_number() != 0) |
Max | 9dabfa2 | 2017-05-16 16:10:45 +0200 | [diff] [blame] | 342 | delay = delta_fn(fn, current_frame_number()); |
Jacob Erlbeck | be4a08b | 2015-08-25 15:19:31 +0200 | [diff] [blame] | 343 | if (delay <= -late_block_delay_thresh) { |
Jacob Erlbeck | 60f7703 | 2015-08-24 14:35:14 +0200 | [diff] [blame] | 344 | LOGP(DRLCMAC, LOGL_NOTICE, |
| 345 | "Late RLC block, FN delta: %d FN: %d curFN: %d\n", |
| 346 | delay, fn, current_frame_number()); |
Jacob Erlbeck | be4a08b | 2015-08-25 15:19:31 +0200 | [diff] [blame] | 347 | rlc_late_block(); |
| 348 | } |
Jacob Erlbeck | 60f7703 | 2015-08-24 14:35:14 +0200 | [diff] [blame] | 349 | |
| 350 | m_cur_blk_fn = fn; |
| 351 | if (delay < fn_update_ok_min_delay || delay > fn_update_ok_max_delay || |
| 352 | current_frame_number() == 0) |
| 353 | m_cur_fn = fn; |
| 354 | |
Jacob Erlbeck | af75ce8 | 2015-08-26 13:22:28 +0200 | [diff] [blame] | 355 | m_pollController.expireTimedout(fn, max_delay); |
Jacob Erlbeck | 60f7703 | 2015-08-24 14:35:14 +0200 | [diff] [blame] | 356 | } |
| 357 | |
Pau Espin Pedrol | fbfab29 | 2019-12-23 13:19:25 +0100 | [diff] [blame] | 358 | int BTS::add_paging(uint8_t chan_needed, const uint8_t *mi, uint8_t mi_len) |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 359 | { |
| 360 | uint8_t l, trx, ts, any_tbf = 0; |
| 361 | struct gprs_rlcmac_tbf *tbf; |
Jacob Erlbeck | ed2dbf6 | 2015-12-28 19:15:40 +0100 | [diff] [blame] | 362 | LListHead<gprs_rlcmac_tbf> *pos; |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 363 | uint8_t slot_mask[8]; |
| 364 | int8_t first_ts; /* must be signed */ |
| 365 | |
Jacob Erlbeck | ed2dbf6 | 2015-12-28 19:15:40 +0100 | [diff] [blame] | 366 | LListHead<gprs_rlcmac_tbf> *tbfs_lists[] = { |
| 367 | &m_ul_tbfs, |
| 368 | &m_dl_tbfs, |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 369 | NULL |
| 370 | }; |
| 371 | |
| 372 | |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 373 | LOGP(DRLCMAC, LOGL_INFO, "Add RR paging: chan-needed=%d MI=%s\n", |
Pau Espin Pedrol | fbfab29 | 2019-12-23 13:19:25 +0100 | [diff] [blame] | 374 | chan_needed, osmo_mi_name(mi, mi_len)); |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 375 | |
| 376 | /* collect slots to page |
| 377 | * Mark slots for every TBF, but only mark one of it. |
| 378 | * Mark only the first slot found. |
| 379 | * Don't mark, if TBF uses a different slot that is already marked. */ |
| 380 | memset(slot_mask, 0, sizeof(slot_mask)); |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 381 | for (l = 0; tbfs_lists[l]; l++) { |
Jacob Erlbeck | ed2dbf6 | 2015-12-28 19:15:40 +0100 | [diff] [blame] | 382 | llist_for_each(pos, tbfs_lists[l]) { |
| 383 | tbf = pos->entry(); |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 384 | first_ts = -1; |
| 385 | for (ts = 0; ts < 8; ts++) { |
| 386 | if (tbf->pdch[ts]) { |
| 387 | /* remember the first slot found */ |
| 388 | if (first_ts < 0) |
| 389 | first_ts = ts; |
| 390 | /* break, if we already marked a slot */ |
Holger Hans Peter Freyther | ec80f82 | 2013-10-27 13:44:37 +0100 | [diff] [blame] | 391 | if ((slot_mask[tbf->trx->trx_no] & (1 << ts))) |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 392 | break; |
| 393 | } |
| 394 | } |
| 395 | /* mark first slot found, if none is marked already */ |
| 396 | if (ts == 8 && first_ts >= 0) { |
Max | c21f007 | 2017-12-15 17:36:45 +0100 | [diff] [blame] | 397 | LOGPTBF(tbf, LOGL_DEBUG, "uses " |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 398 | "TRX=%d TS=%d, so we mark\n", |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 399 | tbf->trx->trx_no, first_ts); |
Holger Hans Peter Freyther | ec80f82 | 2013-10-27 13:44:37 +0100 | [diff] [blame] | 400 | slot_mask[tbf->trx->trx_no] |= (1 << first_ts); |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 401 | } else |
Max | c21f007 | 2017-12-15 17:36:45 +0100 | [diff] [blame] | 402 | LOGPTBF(tbf, LOGL_DEBUG, "uses " |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 403 | "already marked TRX=%d TS=%d\n", |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 404 | tbf->trx->trx_no, ts); |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 405 | } |
| 406 | } |
| 407 | |
| 408 | /* Now we have a list of marked slots. Every TBF uses at least one |
| 409 | * of these slots. */ |
| 410 | |
| 411 | /* schedule paging to all marked slots */ |
| 412 | for (trx = 0; trx < 8; trx++) { |
| 413 | if (slot_mask[trx] == 0) |
| 414 | continue; |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 415 | for (ts = 0; ts < 8; ts++) { |
| 416 | if ((slot_mask[trx] & (1 << ts))) { |
| 417 | /* schedule */ |
Pau Espin Pedrol | fbfab29 | 2019-12-23 13:19:25 +0100 | [diff] [blame] | 418 | if (!m_bts.trx[trx].pdch[ts].add_paging(chan_needed, mi, mi_len)) |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 419 | return -ENOMEM; |
Max | 4382e4e | 2018-01-30 12:00:08 +0100 | [diff] [blame] | 420 | |
| 421 | LOGP(DRLCMAC, LOGL_INFO, "Paging on PACCH of TRX=%d TS=%d\n", trx, ts); |
Holger Hans Peter Freyther | 9446485 | 2013-10-19 18:33:52 +0200 | [diff] [blame] | 422 | any_tbf = 1; |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 423 | } |
| 424 | } |
| 425 | } |
| 426 | |
| 427 | if (!any_tbf) |
| 428 | LOGP(DRLCMAC, LOGL_INFO, "No paging, because no TBF\n"); |
| 429 | |
| 430 | return 0; |
| 431 | } |
| 432 | |
Harald Welte | 717cdf5 | 2017-07-21 21:56:23 +0200 | [diff] [blame] | 433 | void BTS::send_gsmtap(enum pcu_gsmtap_category categ, bool uplink, uint8_t trx_no, |
| 434 | uint8_t ts_no, uint8_t channel, uint32_t fn, |
| 435 | const uint8_t *data, unsigned int len) |
| 436 | { |
| 437 | uint16_t arfcn; |
| 438 | |
| 439 | /* check if category is activated at all */ |
| 440 | if (!(m_bts.gsmtap_categ_mask & (1 << categ))) |
| 441 | return; |
| 442 | |
| 443 | arfcn = m_bts.trx[trx_no].arfcn; |
| 444 | if (uplink) |
| 445 | arfcn |= GSMTAP_ARFCN_F_UPLINK; |
| 446 | |
| 447 | gsmtap_send(m_bts.gsmtap, arfcn, ts_no, channel, 0, fn, 0, 0, data, len); |
| 448 | } |
| 449 | |
Max | 341dccd | 2017-08-14 15:49:59 +0200 | [diff] [blame] | 450 | static inline bool tbf_check(gprs_rlcmac_tbf *tbf, uint32_t fn, uint8_t trx_no, uint8_t ts) |
| 451 | { |
Max | cac6b66 | 2018-01-24 11:00:17 +0100 | [diff] [blame] | 452 | if (tbf->state_is_not(GPRS_RLCMAC_RELEASING) && tbf->poll_scheduled() |
Max | 341dccd | 2017-08-14 15:49:59 +0200 | [diff] [blame] | 453 | && tbf->poll_fn == fn && tbf->trx->trx_no == trx_no && tbf->poll_ts == ts) |
| 454 | return true; |
| 455 | |
| 456 | return false; |
| 457 | } |
| 458 | |
Daniel Willmann | fe6e2e4 | 2014-07-10 17:44:06 +0200 | [diff] [blame] | 459 | gprs_rlcmac_dl_tbf *BTS::dl_tbf_by_poll_fn(uint32_t fn, uint8_t trx, uint8_t ts) |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 460 | { |
Jacob Erlbeck | ed2dbf6 | 2015-12-28 19:15:40 +0100 | [diff] [blame] | 461 | LListHead<gprs_rlcmac_tbf> *pos; |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 462 | |
| 463 | /* only one TBF can poll on specific TS/FN, because scheduler can only |
| 464 | * schedule one downlink control block (with polling) at a FN per TS */ |
Jacob Erlbeck | ed2dbf6 | 2015-12-28 19:15:40 +0100 | [diff] [blame] | 465 | llist_for_each(pos, &m_dl_tbfs) { |
Max | 341dccd | 2017-08-14 15:49:59 +0200 | [diff] [blame] | 466 | if (tbf_check(pos->entry(), fn, trx, ts)) |
| 467 | return as_dl_tbf(pos->entry()); |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 468 | } |
Daniel Willmann | febf1a0 | 2014-07-02 17:58:16 +0200 | [diff] [blame] | 469 | return NULL; |
| 470 | } |
Max | 341dccd | 2017-08-14 15:49:59 +0200 | [diff] [blame] | 471 | |
Daniel Willmann | fe6e2e4 | 2014-07-10 17:44:06 +0200 | [diff] [blame] | 472 | gprs_rlcmac_ul_tbf *BTS::ul_tbf_by_poll_fn(uint32_t fn, uint8_t trx, uint8_t ts) |
Daniel Willmann | febf1a0 | 2014-07-02 17:58:16 +0200 | [diff] [blame] | 473 | { |
Jacob Erlbeck | ed2dbf6 | 2015-12-28 19:15:40 +0100 | [diff] [blame] | 474 | LListHead<gprs_rlcmac_tbf> *pos; |
Daniel Willmann | febf1a0 | 2014-07-02 17:58:16 +0200 | [diff] [blame] | 475 | |
| 476 | /* only one TBF can poll on specific TS/FN, because scheduler can only |
| 477 | * schedule one downlink control block (with polling) at a FN per TS */ |
Jacob Erlbeck | ed2dbf6 | 2015-12-28 19:15:40 +0100 | [diff] [blame] | 478 | llist_for_each(pos, &m_ul_tbfs) { |
Max | 341dccd | 2017-08-14 15:49:59 +0200 | [diff] [blame] | 479 | if (tbf_check(pos->entry(), fn, trx, ts)) |
| 480 | return as_ul_tbf(pos->entry()); |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 481 | } |
| 482 | return NULL; |
| 483 | } |
| 484 | |
Daniel Willmann | 54044b0 | 2014-07-02 17:58:15 +0200 | [diff] [blame] | 485 | /* lookup downlink TBF Entity (by TFI) */ |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 486 | gprs_rlcmac_dl_tbf *BTS::dl_tbf_by_tfi(uint8_t tfi, uint8_t trx, uint8_t ts) |
Daniel Willmann | 54044b0 | 2014-07-02 17:58:15 +0200 | [diff] [blame] | 487 | { |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 488 | if (trx >= 8 || ts >= 8) |
| 489 | return NULL; |
| 490 | |
| 491 | return m_bts.trx[trx].pdch[ts].dl_tbf_by_tfi(tfi); |
Daniel Willmann | 54044b0 | 2014-07-02 17:58:15 +0200 | [diff] [blame] | 492 | } |
| 493 | |
| 494 | /* lookup uplink TBF Entity (by TFI) */ |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 495 | gprs_rlcmac_ul_tbf *BTS::ul_tbf_by_tfi(uint8_t tfi, uint8_t trx, uint8_t ts) |
Daniel Willmann | 54044b0 | 2014-07-02 17:58:15 +0200 | [diff] [blame] | 496 | { |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 497 | if (trx >= 8 || ts >= 8) |
Holger Hans Peter Freyther | f63cabd | 2013-10-26 19:10:43 +0200 | [diff] [blame] | 498 | return NULL; |
| 499 | |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 500 | return m_bts.trx[trx].pdch[ts].ul_tbf_by_tfi(tfi); |
Holger Hans Peter Freyther | f63cabd | 2013-10-26 19:10:43 +0200 | [diff] [blame] | 501 | } |
| 502 | |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 503 | /* |
| 504 | * Search for free TFI and return TFI, TRX. |
| 505 | * This method returns the first TFI that is currently not used in any PDCH of |
| 506 | * a TRX. The first TRX that contains such an TFI is returned. Negative values |
| 507 | * indicate errors. |
| 508 | */ |
Max | a76a7d0 | 2018-01-26 11:09:16 +0100 | [diff] [blame] | 509 | int BTS::tfi_find_free(enum gprs_rlcmac_tbf_direction dir, uint8_t *_trx, int8_t use_trx) const |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 510 | { |
Max | a76a7d0 | 2018-01-26 11:09:16 +0100 | [diff] [blame] | 511 | const struct gprs_rlcmac_pdch *pdch; |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 512 | uint32_t free_tfis; |
| 513 | bool has_pdch = false; |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 514 | uint8_t trx_from, trx_to, trx, ts, tfi; |
| 515 | |
| 516 | if (use_trx >= 0 && use_trx < 8) |
| 517 | trx_from = trx_to = use_trx; |
| 518 | else { |
| 519 | trx_from = 0; |
| 520 | trx_to = 7; |
| 521 | } |
| 522 | |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 523 | /* find a TFI that is unused on all PDCH */ |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 524 | for (trx = trx_from; trx <= trx_to; trx++) { |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 525 | bool trx_has_pdch = false; |
| 526 | |
Max | d000d80 | 2017-09-20 17:55:28 +0200 | [diff] [blame] | 527 | free_tfis = NO_FREE_TFI; |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 528 | |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 529 | for (ts = 0; ts < 8; ts++) { |
| 530 | pdch = &m_bts.trx[trx].pdch[ts]; |
| 531 | if (!pdch->is_enabled()) |
| 532 | continue; |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 533 | free_tfis &= ~pdch->assigned_tfi(dir); |
| 534 | trx_has_pdch = true; |
| 535 | has_pdch = true; |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 536 | } |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 537 | if (trx_has_pdch && free_tfis) |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 538 | break; |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 539 | |
| 540 | free_tfis = 0; |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 541 | } |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 542 | if (!has_pdch) { |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 543 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH available.\n"); |
| 544 | return -EINVAL; |
| 545 | } |
| 546 | |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 547 | if (!free_tfis) { |
Max | 69d585e | 2018-01-26 12:36:43 +0100 | [diff] [blame] | 548 | LOGP(DRLCMAC, LOGL_NOTICE, "No TFI available (suggested TRX: %d).\n", use_trx); |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 549 | return -EBUSY; |
| 550 | } |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 551 | |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 552 | |
| 553 | LOGP(DRLCMAC, LOGL_DEBUG, |
| 554 | "Searching for first unallocated TFI: TRX=%d\n", trx); |
| 555 | |
| 556 | /* find the first */ |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 557 | for (tfi = 0; tfi < 32; tfi++) { |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 558 | if (free_tfis & 1 << tfi) |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 559 | break; |
| 560 | } |
| 561 | |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 562 | OSMO_ASSERT(tfi < 32); |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 563 | |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 564 | LOGP(DRLCMAC, LOGL_DEBUG, " Found TFI=%d.\n", tfi); |
| 565 | *_trx = trx; |
| 566 | return tfi; |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 567 | } |
| 568 | |
Holger Hans Peter Freyther | 40cfaa6 | 2013-10-26 19:49:16 +0200 | [diff] [blame] | 569 | int BTS::rcv_imm_ass_cnf(const uint8_t *data, uint32_t fn) |
| 570 | { |
Jacob Erlbeck | 767193e | 2015-05-20 12:06:46 +0200 | [diff] [blame] | 571 | struct gprs_rlcmac_dl_tbf *dl_tbf = NULL; |
Holger Hans Peter Freyther | 40cfaa6 | 2013-10-26 19:49:16 +0200 | [diff] [blame] | 572 | uint8_t plen; |
| 573 | uint32_t tlli; |
Jacob Erlbeck | 767193e | 2015-05-20 12:06:46 +0200 | [diff] [blame] | 574 | GprsMs *ms; |
Holger Hans Peter Freyther | 40cfaa6 | 2013-10-26 19:49:16 +0200 | [diff] [blame] | 575 | |
| 576 | /* move to IA Rest Octets */ |
| 577 | plen = data[0] >> 2; |
| 578 | data += 1 + plen; |
| 579 | |
| 580 | if ((*data & 0xf0) != 0xd0) { |
| 581 | LOGP(DRLCMAC, LOGL_ERROR, "Got IMM.ASS confirm, but rest " |
| 582 | "octets do not start with bit sequence 'HH01' " |
| 583 | "(Packet Downlink Assignment)\n"); |
| 584 | return -EINVAL; |
| 585 | } |
| 586 | |
| 587 | /* get TLLI from downlink assignment */ |
Eric Wild | ab8b01e | 2019-07-23 17:16:06 +0200 | [diff] [blame] | 588 | tlli = (uint32_t)((*data++) & 0xf) << 28; |
Holger Hans Peter Freyther | 40cfaa6 | 2013-10-26 19:49:16 +0200 | [diff] [blame] | 589 | tlli |= (*data++) << 20; |
| 590 | tlli |= (*data++) << 12; |
| 591 | tlli |= (*data++) << 4; |
| 592 | tlli |= (*data++) >> 4; |
| 593 | |
Jacob Erlbeck | 767193e | 2015-05-20 12:06:46 +0200 | [diff] [blame] | 594 | ms = ms_by_tlli(tlli); |
| 595 | if (ms) |
| 596 | dl_tbf = ms->dl_tbf(); |
Daniel Willmann | 1dac2eb | 2014-08-07 12:37:34 +0200 | [diff] [blame] | 597 | if (!dl_tbf) { |
Holger Hans Peter Freyther | 40cfaa6 | 2013-10-26 19:49:16 +0200 | [diff] [blame] | 598 | LOGP(DRLCMAC, LOGL_ERROR, "Got IMM.ASS confirm, but TLLI=%08x " |
| 599 | "does not exit\n", tlli); |
| 600 | return -EINVAL; |
| 601 | } |
| 602 | |
| 603 | LOGP(DRLCMAC, LOGL_DEBUG, "Got IMM.ASS confirm for TLLI=%08x\n", tlli); |
| 604 | |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 605 | if (dl_tbf->m_wait_confirm) |
Pau Espin Pedrol | 28f160e | 2019-09-05 14:48:35 +0200 | [diff] [blame] | 606 | T_START(dl_tbf, T0, -2002, "assignment (AGCH)", true); |
Holger Hans Peter Freyther | 40cfaa6 | 2013-10-26 19:49:16 +0200 | [diff] [blame] | 607 | |
| 608 | return 0; |
| 609 | } |
| 610 | |
Philipp Maier | 1275a3f | 2017-02-21 19:35:23 +0100 | [diff] [blame] | 611 | /* Determine the full frame number from a relative frame number */ |
Max | 5dd8d1b | 2017-03-08 12:06:42 +0100 | [diff] [blame] | 612 | uint32_t BTS::rfn_to_fn(int32_t rfn) |
Philipp Maier | 1275a3f | 2017-02-21 19:35:23 +0100 | [diff] [blame] | 613 | { |
Max | 5dd8d1b | 2017-03-08 12:06:42 +0100 | [diff] [blame] | 614 | int32_t m_cur_rfn; |
| 615 | int32_t fn; |
| 616 | int32_t fn_rounded; |
| 617 | |
| 618 | /* double-check that relative FN is not negative and fits into int32_t */ |
| 619 | OSMO_ASSERT(rfn < GSM_MAX_FN); |
| 620 | OSMO_ASSERT(rfn >= 0); |
Philipp Maier | 1275a3f | 2017-02-21 19:35:23 +0100 | [diff] [blame] | 621 | |
| 622 | /* Note: If a BTS is sending in a rach request it will be fully aware |
| 623 | * of the frame number. If the PCU is used in a BSC-co-located setup. |
| 624 | * The BSC will forward the incoming RACH request. The RACH request |
| 625 | * only contains the relative frame number (Fn % 42432) in its request |
| 626 | * reference. This PCU implementation has to fit both scenarios, so |
| 627 | * we need to assume that Fn is a relative frame number. */ |
| 628 | |
| 629 | /* Ensure that all following calculations are performed with the |
| 630 | * relative frame number */ |
Max | 5dd8d1b | 2017-03-08 12:06:42 +0100 | [diff] [blame] | 631 | if (rfn >= RFN_MODULUS) |
| 632 | return rfn; |
Philipp Maier | 1275a3f | 2017-02-21 19:35:23 +0100 | [diff] [blame] | 633 | |
| 634 | /* Compute an internal relative frame number from the full internal |
| 635 | frame number */ |
| 636 | m_cur_rfn = m_cur_fn % RFN_MODULUS; |
| 637 | |
| 638 | /* Compute a "rounded" version of the internal frame number, which |
| 639 | * exactly fits in the RFN_MODULUS raster */ |
| 640 | fn_rounded = m_cur_fn - m_cur_rfn; |
| 641 | |
| 642 | /* If the delta between the internal and the external relative frame |
| 643 | * number exceeds a certain limit, we need to assume that the incoming |
| 644 | * rach request belongs to a the previous rfn period. To correct this, |
| 645 | * we roll back the rounded frame number by one RFN_MODULUS */ |
| 646 | if (abs(rfn - m_cur_rfn) > RFN_THRESHOLD) { |
| 647 | LOGP(DRLCMAC, LOGL_DEBUG, |
Thorsten Alteholz | 8bb7904 | 2018-10-06 10:42:58 +0200 | [diff] [blame] | 648 | "Race condition between rfn (%u) and m_cur_fn (%u) detected: rfn belongs to the previous modulus %u cycle, wrapping...\n", |
Philipp Maier | 1275a3f | 2017-02-21 19:35:23 +0100 | [diff] [blame] | 649 | rfn, m_cur_fn, RFN_MODULUS); |
| 650 | if (fn_rounded < RFN_MODULUS) { |
| 651 | LOGP(DRLCMAC, LOGL_DEBUG, |
| 652 | "Cornercase detected: wrapping crosses %u border\n", |
| 653 | GSM_MAX_FN); |
| 654 | fn_rounded = GSM_MAX_FN - (RFN_MODULUS - fn_rounded); |
| 655 | } |
| 656 | else |
| 657 | fn_rounded -= RFN_MODULUS; |
| 658 | } |
| 659 | |
| 660 | /* The real frame number is the sum of the rounded frame number and the |
| 661 | * relative framenumber computed via RACH */ |
| 662 | fn = fn_rounded + rfn; |
| 663 | |
| 664 | return fn; |
| 665 | } |
| 666 | |
Max | 5881858 | 2018-01-05 15:04:50 +0100 | [diff] [blame] | 667 | static inline uint16_t mslot_class_from_ra(uint16_t ra, bool is_11bit) |
| 668 | { |
| 669 | if (is_11bit) |
| 670 | return (ra & 0x3e0) >> 5; |
| 671 | |
| 672 | /* set multislot class to 0 for 8-bit RACH, since we don't know it yet */ |
| 673 | return 0; |
| 674 | } |
| 675 | |
| 676 | static inline uint16_t priority_from_ra(uint16_t ra, bool is_11bit) |
| 677 | { |
| 678 | if (is_11bit) |
| 679 | return (ra & 0x18) >> 3; |
| 680 | |
| 681 | return 0; |
| 682 | } |
| 683 | |
| 684 | static inline bool is_single_block(bool force_two_phase, uint16_t ra, enum ph_burst_type burst_type, bool is_11bit) |
| 685 | { |
| 686 | bool sb = false; |
| 687 | |
| 688 | if ((ra & 0xf8) == 0x70) |
| 689 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests single block allocation\n"); |
| 690 | else if (force_two_phase) |
| 691 | LOGP(DRLCMAC, LOGL_DEBUG, |
| 692 | "MS requests single phase access, but we force two phase access [RACH is %s bit]\n", |
| 693 | is_11bit ? "11" : "8"); |
| 694 | |
Max | 137fd59 | 2018-01-05 15:53:08 +0100 | [diff] [blame] | 695 | switch(burst_type) { |
| 696 | case GSM_L1_BURST_TYPE_ACCESS_0: |
| 697 | if (is_11bit) { |
| 698 | LOGP(DRLCMAC, LOGL_ERROR, "Error: GPRS 11 bit RACH not supported\n"); |
| 699 | return false; |
| 700 | } |
Max | 5881858 | 2018-01-05 15:04:50 +0100 | [diff] [blame] | 701 | |
| 702 | if ((ra & 0xf8) == 0x70) |
Max | 137fd59 | 2018-01-05 15:53:08 +0100 | [diff] [blame] | 703 | return true; |
| 704 | |
| 705 | if (force_two_phase) |
| 706 | return true; |
| 707 | break; |
| 708 | case GSM_L1_BURST_TYPE_ACCESS_1: /* deliberate fall-through */ |
| 709 | case GSM_L1_BURST_TYPE_ACCESS_2: |
| 710 | if (is_11bit) { |
| 711 | if (!(ra & (1 << 10))) { |
| 712 | if (force_two_phase) |
| 713 | return true; |
| 714 | |
| 715 | return false; |
| 716 | } |
| 717 | |
| 718 | return true; |
Max | 5881858 | 2018-01-05 15:04:50 +0100 | [diff] [blame] | 719 | } |
Max | 137fd59 | 2018-01-05 15:53:08 +0100 | [diff] [blame] | 720 | LOGP(DRLCMAC, LOGL_ERROR, "Unexpected RACH burst type %u for 8-bit RACH\n", burst_type); |
| 721 | break; |
| 722 | case GSM_L1_BURST_TYPE_NONE: |
| 723 | LOGP(DRLCMAC, LOGL_ERROR, "PCU has not received burst type from BTS\n"); |
| 724 | break; |
| 725 | default: |
| 726 | LOGP(DRLCMAC, LOGL_ERROR, "Unexpected RACH burst type %u for %s-bit RACH\n", |
| 727 | burst_type, is_11bit ? "11" : "8"); |
Max | 5881858 | 2018-01-05 15:04:50 +0100 | [diff] [blame] | 728 | } |
| 729 | |
| 730 | return sb; |
| 731 | } |
| 732 | |
| 733 | int BTS::rcv_rach(uint16_t ra, uint32_t Fn, int16_t qta, bool is_11bit, |
bhargava | 959d1de | 2016-08-17 15:17:21 +0530 | [diff] [blame] | 734 | enum ph_burst_type burst_type) |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 735 | { |
Jacob Erlbeck | 1f33294 | 2015-05-04 08:21:17 +0200 | [diff] [blame] | 736 | struct gprs_rlcmac_ul_tbf *tbf = NULL; |
Holger Hans Peter Freyther | f37e514 | 2013-12-25 18:56:34 +0100 | [diff] [blame] | 737 | uint8_t trx_no, ts_no = 0; |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 738 | uint8_t sb = 0; |
| 739 | uint32_t sb_fn = 0; |
aravind sirsikar | c0c3afd | 2016-11-09 16:27:00 +0530 | [diff] [blame] | 740 | int rc = 0; |
Jacob Erlbeck | 2647a33 | 2016-02-01 16:13:38 +0100 | [diff] [blame] | 741 | int plen; |
Jacob Erlbeck | 2ca86af | 2016-01-20 18:26:13 +0100 | [diff] [blame] | 742 | uint8_t usf = 7; |
aravind sirsikar | c0c3afd | 2016-11-09 16:27:00 +0530 | [diff] [blame] | 743 | uint8_t tsc = 0, ta = qta2ta(qta); |
Max | 5881858 | 2018-01-05 15:04:50 +0100 | [diff] [blame] | 744 | uint16_t ms_class = mslot_class_from_ra(ra, is_11bit); |
aravind sirsikar | c0c3afd | 2016-11-09 16:27:00 +0530 | [diff] [blame] | 745 | bool failure = false; |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 746 | |
Holger Hans Peter Freyther | c1ae226 | 2013-10-27 10:50:35 +0100 | [diff] [blame] | 747 | rach_frame(); |
| 748 | |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 749 | if (is_11bit) |
| 750 | rach_frame_11bit(); |
| 751 | |
Philipp Maier | 1275a3f | 2017-02-21 19:35:23 +0100 | [diff] [blame] | 752 | /* Determine full frame number */ |
| 753 | Fn = rfn_to_fn(Fn); |
Philipp | d935d88 | 2016-11-07 13:07:36 +0100 | [diff] [blame] | 754 | |
Pau Espin Pedrol | 1ec211f | 2019-09-30 18:33:14 +0200 | [diff] [blame] | 755 | send_gsmtap(PCU_GSMTAP_C_UL_RACH, true, 0, ts_no, GSMTAP_CHANNEL_RACH, |
| 756 | Fn, (uint8_t*)&ra, is_11bit ? 2 : 1); |
| 757 | |
aravind sirsikar | c0c3afd | 2016-11-09 16:27:00 +0530 | [diff] [blame] | 758 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF on RACH, " |
Philipp Maier | 53f0b4d | 2017-01-26 11:39:16 +0100 | [diff] [blame] | 759 | "so we provide one: ra=0x%02x Fn=%u qta=%d is_11bit=%d:\n", |
| 760 | ra, Fn, qta, is_11bit); |
bhargava | 628dcfb | 2016-09-14 20:30:31 +0530 | [diff] [blame] | 761 | |
Max | 5881858 | 2018-01-05 15:04:50 +0100 | [diff] [blame] | 762 | sb = is_single_block(m_bts.force_two_phase, ra, burst_type, is_11bit); |
bhargava | 628dcfb | 2016-09-14 20:30:31 +0530 | [diff] [blame] | 763 | |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 764 | if (sb) { |
Jacob Erlbeck | 2ca86af | 2016-01-20 18:26:13 +0100 | [diff] [blame] | 765 | rc = sba()->alloc(&trx_no, &ts_no, &sb_fn, ta); |
aravind sirsikar | c0c3afd | 2016-11-09 16:27:00 +0530 | [diff] [blame] | 766 | if (rc < 0) { |
| 767 | failure = true; |
| 768 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH resource for " |
| 769 | "single block allocation." |
| 770 | "sending Immediate " |
| 771 | "Assignment Uplink (AGCH) reject\n"); |
| 772 | } else { |
| 773 | tsc = m_bts.trx[trx_no].pdch[ts_no].tsc; |
| 774 | |
| 775 | LOGP(DRLCMAC, LOGL_DEBUG, "RX: [PCU <- BTS] RACH " |
| 776 | " qbit-ta=%d ra=0x%02x, Fn=%d (%d,%d,%d)," |
| 777 | " SBFn=%d\n", |
| 778 | qta, ra, |
| 779 | Fn, (Fn / (26 * 51)) % 32, Fn % 51, Fn % 26, |
| 780 | sb_fn); |
| 781 | LOGP(DRLCMAC, LOGL_INFO, "TX: Immediate Assignment " |
| 782 | "Uplink (AGCH)\n"); |
| 783 | } |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 784 | } else { |
| 785 | // Create new TBF |
Max | 5a6bcfb | 2017-09-01 14:36:44 +0200 | [diff] [blame] | 786 | /* FIXME: Copy and paste with other routines.. */ |
bhargava | 628dcfb | 2016-09-14 20:30:31 +0530 | [diff] [blame] | 787 | |
Max | 92b7a50 | 2018-01-26 11:01:35 +0100 | [diff] [blame] | 788 | tbf = tbf_alloc_ul_tbf(&m_bts, NULL, -1, 0, ms_class, true); |
bhargava | 628dcfb | 2016-09-14 20:30:31 +0530 | [diff] [blame] | 789 | |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 790 | if (!tbf) { |
aravind sirsikar | c0c3afd | 2016-11-09 16:27:00 +0530 | [diff] [blame] | 791 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH resource sending " |
| 792 | "Immediate Assignment Uplink (AGCH) " |
| 793 | "reject\n"); |
| 794 | rc = -EBUSY; |
| 795 | failure = true; |
| 796 | } else { |
| 797 | tbf->set_ta(ta); |
Max | 2399b1d | 2018-01-12 15:48:12 +0100 | [diff] [blame] | 798 | TBF_SET_STATE(tbf, GPRS_RLCMAC_FLOW); |
Max | 5d7f757 | 2018-01-30 16:56:43 +0100 | [diff] [blame] | 799 | TBF_ASS_TYPE_SET(tbf, GPRS_RLCMAC_FLAG_CCCH); |
Pau Espin Pedrol | 28f160e | 2019-09-05 14:48:35 +0200 | [diff] [blame] | 800 | T_START(tbf, T3169, 3169, "RACH (new UL-TBF)", true); |
Max | c21f007 | 2017-12-15 17:36:45 +0100 | [diff] [blame] | 801 | LOGPTBF(tbf, LOGL_DEBUG, "[UPLINK] START\n"); |
| 802 | LOGPTBF(tbf, LOGL_DEBUG, "RX: [PCU <- BTS] RACH " |
aravind sirsikar | c0c3afd | 2016-11-09 16:27:00 +0530 | [diff] [blame] | 803 | "qbit-ta=%d ra=0x%02x, Fn=%d " |
| 804 | " (%d,%d,%d)\n", |
aravind sirsikar | c0c3afd | 2016-11-09 16:27:00 +0530 | [diff] [blame] | 805 | qta, ra, Fn, (Fn / (26 * 51)) % 32, |
| 806 | Fn % 51, Fn % 26); |
Max | c21f007 | 2017-12-15 17:36:45 +0100 | [diff] [blame] | 807 | LOGPTBF(tbf, LOGL_INFO, "TX: START Immediate Assignment Uplink (AGCH)\n"); |
aravind sirsikar | c0c3afd | 2016-11-09 16:27:00 +0530 | [diff] [blame] | 808 | trx_no = tbf->trx->trx_no; |
| 809 | ts_no = tbf->first_ts; |
| 810 | usf = tbf->m_usf[ts_no]; |
| 811 | tsc = tbf->tsc(); |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 812 | } |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 813 | } |
Alexander Couzens | ccde5c9 | 2017-02-04 03:10:08 +0100 | [diff] [blame] | 814 | bitvec *immediate_assignment = bitvec_alloc(22, tall_pcu_ctx) /* without plen */; |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 815 | bitvec_unhex(immediate_assignment, |
| 816 | "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
Jacob Erlbeck | 2ca86af | 2016-01-20 18:26:13 +0100 | [diff] [blame] | 817 | |
Jacob Erlbeck | 2ca86af | 2016-01-20 18:26:13 +0100 | [diff] [blame] | 818 | |
sivasankari | 168911b | 2016-11-25 19:53:36 +0530 | [diff] [blame] | 819 | if (failure) { |
aravind sirsikar | c0c3afd | 2016-11-09 16:27:00 +0530 | [diff] [blame] | 820 | plen = Encoding::write_immediate_assignment_reject( |
| 821 | immediate_assignment, ra, Fn, |
| 822 | burst_type); |
sivasankari | 168911b | 2016-11-25 19:53:36 +0530 | [diff] [blame] | 823 | immediate_assignment_reject(); |
| 824 | } |
aravind sirsikar | c0c3afd | 2016-11-09 16:27:00 +0530 | [diff] [blame] | 825 | else { |
| 826 | LOGP(DRLCMAC, LOGL_DEBUG, |
| 827 | " - TRX=%d (%d) TS=%d TA=%d TSC=%d TFI=%d USF=%d\n", |
| 828 | trx_no, m_bts.trx[trx_no].arfcn, ts_no, ta, tsc, |
| 829 | tbf ? tbf->tfi() : -1, usf); |
Max | fc8afc2 | 2019-02-18 18:52:38 +0100 | [diff] [blame] | 830 | // N. B: if tbf == NULL then SBA is used for Imm. Ass. below |
| 831 | plen = Encoding::write_immediate_assignment(tbf, immediate_assignment, false, ra, Fn, ta, |
| 832 | m_bts.trx[trx_no].arfcn, ts_no, tsc, usf, false, sb_fn, |
| 833 | m_bts.alpha, m_bts.gamma, -1, burst_type); |
aravind sirsikar | c0c3afd | 2016-11-09 16:27:00 +0530 | [diff] [blame] | 834 | } |
Jacob Erlbeck | 2ca86af | 2016-01-20 18:26:13 +0100 | [diff] [blame] | 835 | |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 836 | if (plen >= 0) { |
| 837 | immediate_assignment_ul_tbf(); |
Jacob Erlbeck | 2647a33 | 2016-02-01 16:13:38 +0100 | [diff] [blame] | 838 | pcu_l1if_tx_agch(immediate_assignment, plen); |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 839 | } |
Jacob Erlbeck | 2647a33 | 2016-02-01 16:13:38 +0100 | [diff] [blame] | 840 | |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 841 | bitvec_free(immediate_assignment); |
| 842 | |
aravind sirsikar | c0c3afd | 2016-11-09 16:27:00 +0530 | [diff] [blame] | 843 | return rc; |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 844 | } |
| 845 | |
Vadim Yanitskiy | ffebd24 | 2019-10-05 23:45:31 +0700 | [diff] [blame] | 846 | /* PTCCH/U sub-slot / frame-number mapping (see 3GPP TS 45.002, table 6) */ |
| 847 | static uint32_t ptcch_slot_map[PTCCH_TAI_NUM] = { |
| 848 | 12, 38, 64, 90, |
| 849 | 116, 142, 168, 194, |
| 850 | 220, 246, 272, 298, |
| 851 | 324, 350, 376, 402, |
| 852 | }; |
| 853 | |
| 854 | int BTS::rcv_ptcch_rach(uint8_t trx_nr, uint8_t ts_nr, uint32_t fn, int16_t qta) |
| 855 | { |
| 856 | struct gprs_rlcmac_bts *bts = bts_data(); |
| 857 | struct gprs_rlcmac_pdch *pdch; |
| 858 | uint32_t fn416 = fn % 416; |
| 859 | uint8_t ss; |
| 860 | |
| 861 | /* Prevent buffer overflow */ |
| 862 | if (trx_nr >= ARRAY_SIZE(bts->trx) || ts_nr >= 8) { |
| 863 | LOGP(DRLCMAC, LOGL_ERROR, "Malformed RACH.ind message " |
| 864 | "(TRX=%u TS=%u FN=%u)\n", trx_nr, ts_nr, fn); |
| 865 | return -EINVAL; |
| 866 | } |
| 867 | |
| 868 | /* Make sure PDCH time-slot is enabled */ |
| 869 | pdch = &bts->trx[trx_nr].pdch[ts_nr]; |
| 870 | if (!pdch->m_is_enabled) { |
| 871 | LOGP(DRLCMAC, LOGL_NOTICE, "Rx PTCCH RACH.ind for inactive PDCH " |
| 872 | "(TRX=%u TS=%u FN=%u)\n", trx_nr, ts_nr, fn); |
| 873 | return -EAGAIN; |
| 874 | } |
| 875 | |
| 876 | /* Convert TDMA frame-number to PTCCH/U sub-slot number */ |
| 877 | for (ss = 0; ss < PTCCH_TAI_NUM; ss++) |
| 878 | if (ptcch_slot_map[ss] == fn416) |
| 879 | break; |
| 880 | if (ss == PTCCH_TAI_NUM) { |
| 881 | LOGP(DRLCMAC, LOGL_ERROR, "Failed to map PTCCH/U sub-slot for fn=%u\n", fn); |
| 882 | return -ENODEV; |
| 883 | } |
| 884 | |
| 885 | /* Apply the new Timing Advance value */ |
| 886 | LOGP(DRLCMAC, LOGL_INFO, "Continuous Timing Advance update " |
| 887 | "for TAI %u, new TA is %u\n", ss, qta2ta(qta)); |
| 888 | pdch->update_ta(ss, qta2ta(qta)); |
| 889 | |
| 890 | return 0; |
| 891 | } |
| 892 | |
Pau Espin Pedrol | d7c3265 | 2019-12-23 12:41:34 +0100 | [diff] [blame] | 893 | void BTS::snd_dl_ass(gprs_rlcmac_tbf *tbf, bool poll, uint16_t pgroup) |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 894 | { |
| 895 | int plen; |
Jacob Erlbeck | 29e3a2f | 2016-02-05 19:04:23 +0100 | [diff] [blame] | 896 | unsigned int ts = tbf->first_ts; |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 897 | |
Max | c21f007 | 2017-12-15 17:36:45 +0100 | [diff] [blame] | 898 | LOGPTBF(tbf, LOGL_INFO, "TX: START Immediate Assignment Downlink (PCH)\n"); |
Alexander Couzens | ccde5c9 | 2017-02-04 03:10:08 +0100 | [diff] [blame] | 899 | bitvec *immediate_assignment = bitvec_alloc(22, tall_pcu_ctx); /* without plen */ |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 900 | bitvec_unhex(immediate_assignment, "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
| 901 | /* use request reference that has maximum distance to current time, |
| 902 | * so the assignment will not conflict with possible RACH requests. */ |
Jacob Erlbeck | 2ca86af | 2016-01-20 18:26:13 +0100 | [diff] [blame] | 903 | LOGP(DRLCMAC, LOGL_DEBUG, " - TRX=%d (%d) TS=%d TA=%d pollFN=%d\n", |
| 904 | tbf->trx->trx_no, tbf->trx->arfcn, |
| 905 | ts, tbf->ta(), poll ? tbf->poll_fn : -1); |
Max | fc8afc2 | 2019-02-18 18:52:38 +0100 | [diff] [blame] | 906 | plen = Encoding::write_immediate_assignment(tbf, immediate_assignment, true, 125, |
| 907 | (tbf->pdch[ts]->last_rts_fn + 21216) % GSM_MAX_FN, tbf->ta(), |
| 908 | tbf->trx->arfcn, ts, tbf->tsc(), 7, poll, |
| 909 | tbf->poll_fn, m_bts.alpha, m_bts.gamma, -1, |
| 910 | GSM_L1_BURST_TYPE_ACCESS_0); |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 911 | if (plen >= 0) { |
| 912 | immediate_assignment_dl_tbf(); |
Pau Espin Pedrol | d7c3265 | 2019-12-23 12:41:34 +0100 | [diff] [blame] | 913 | pcu_l1if_tx_pch(immediate_assignment, plen, pgroup); |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 914 | } |
| 915 | |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 916 | bitvec_free(immediate_assignment); |
| 917 | } |
| 918 | |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 919 | |
Jacob Erlbeck | 86b6f05 | 2015-11-27 15:17:34 +0100 | [diff] [blame] | 920 | GprsMs *BTS::ms_alloc(uint8_t ms_class, uint8_t egprs_ms_class) |
Jacob Erlbeck | cb1b494 | 2015-06-19 10:59:58 +0200 | [diff] [blame] | 921 | { |
| 922 | GprsMs *ms; |
| 923 | ms = ms_store().create_ms(); |
| 924 | |
Pau Espin Pedrol | 63700ea | 2019-09-09 13:19:06 +0200 | [diff] [blame] | 925 | ms->set_timeout(osmo_tdef_get(m_bts.T_defs_pcu, -2030, OSMO_TDEF_S, -1)); |
Jacob Erlbeck | cb1b494 | 2015-06-19 10:59:58 +0200 | [diff] [blame] | 926 | ms->set_ms_class(ms_class); |
Jacob Erlbeck | 86b6f05 | 2015-11-27 15:17:34 +0100 | [diff] [blame] | 927 | ms->set_egprs_ms_class(egprs_ms_class); |
Jacob Erlbeck | cb1b494 | 2015-06-19 10:59:58 +0200 | [diff] [blame] | 928 | |
| 929 | return ms; |
| 930 | } |
| 931 | |
Minh-Quang Nguyen | 1bcfa9a | 2017-11-01 14:41:37 -0400 | [diff] [blame] | 932 | /* update TA based on TA provided by PH-DATA-IND */ |
| 933 | void update_tbf_ta(struct gprs_rlcmac_ul_tbf *tbf, int8_t ta_delta) |
| 934 | { |
| 935 | int16_t ta_adj; |
| 936 | uint8_t ta_target; |
| 937 | |
| 938 | if (ta_delta) { |
| 939 | /* adjust TA based on TA provided by PH-DATA-IND */ |
| 940 | ta_adj = tbf->ta() + ta_delta; |
| 941 | |
| 942 | /* limit target TA in range 0..63 bits */ |
| 943 | ta_target = ta_limit(ta_adj); |
| 944 | |
| 945 | LOGP(DL1IF, LOGL_INFO, "PH-DATA-IND is updating TLLI=0x%08x: TA %u -> %u on " |
| 946 | "TRX = %d, TS = %d, FN = %d\n", |
| 947 | tbf->tlli(), tbf->ta(), ta_target, |
| 948 | tbf->trx->trx_no , tbf->poll_ts, tbf->poll_fn); |
| 949 | tbf->set_ta(ta_target); |
| 950 | } |
| 951 | } |
| 952 | |
| 953 | /* set TA based on TA provided by PH-RA-IND */ |
| 954 | void set_tbf_ta(struct gprs_rlcmac_ul_tbf *tbf, uint8_t ta) |
| 955 | { |
| 956 | uint8_t ta_target; |
| 957 | |
| 958 | if (tbf->ta() != ta) { |
| 959 | /* limit target TA in range 0..63 bits */ |
| 960 | ta_target = ta_limit(ta); |
| 961 | |
| 962 | LOGP(DL1IF, LOGL_INFO, "PH-RA-IND is updating TLLI=0x%08x: TA %u -> %u on " |
| 963 | "TRX = %d, TS = %d, FN = %d\n", |
| 964 | tbf->tlli(), tbf->ta(), ta_target, |
| 965 | tbf->trx->trx_no , tbf->poll_ts, tbf->poll_fn); |
| 966 | tbf->set_ta(ta_target); |
| 967 | } |
| 968 | } |
| 969 | |
| 970 | void bts_update_tbf_ta(const char *p, uint32_t fn, uint8_t trx_no, uint8_t ts, int8_t ta, bool is_rach) |
Max | d71e8b3 | 2016-09-19 16:17:06 +0200 | [diff] [blame] | 971 | { |
| 972 | struct gprs_rlcmac_ul_tbf *tbf = |
| 973 | bts_main_data()->bts->ul_tbf_by_poll_fn(fn, trx_no, ts); |
| 974 | if (!tbf) |
| 975 | LOGP(DL1IF, LOGL_DEBUG, "[%s] update TA = %u ignored due to " |
| 976 | "unknown UL TBF on TRX = %d, TS = %d, FN = %d\n", |
| 977 | p, ta, trx_no, ts, fn); |
Minh-Quang Nguyen | 1bcfa9a | 2017-11-01 14:41:37 -0400 | [diff] [blame] | 978 | else { |
| 979 | /* we need to distinguish TA information provided by L1 |
| 980 | * from PH-DATA-IND and PHY-RA-IND so that we can properly |
| 981 | * update TA for given TBF |
| 982 | */ |
| 983 | if (is_rach) |
| 984 | set_tbf_ta(tbf, (uint8_t)ta); |
| 985 | else |
| 986 | update_tbf_ta(tbf, ta); |
| 987 | |
Max | d71e8b3 | 2016-09-19 16:17:06 +0200 | [diff] [blame] | 988 | } |
| 989 | } |
| 990 | |
Jacob Erlbeck | 23f93a1 | 2015-06-30 08:52:54 +0200 | [diff] [blame] | 991 | void gprs_rlcmac_trx::reserve_slots(enum gprs_rlcmac_tbf_direction dir, |
| 992 | uint8_t slots) |
| 993 | { |
| 994 | unsigned i; |
| 995 | for (i = 0; i < ARRAY_SIZE(pdch); i += 1) |
| 996 | if (slots & (1 << i)) |
| 997 | pdch[i].reserve(dir); |
| 998 | } |
| 999 | |
| 1000 | void gprs_rlcmac_trx::unreserve_slots(enum gprs_rlcmac_tbf_direction dir, |
| 1001 | uint8_t slots) |
| 1002 | { |
| 1003 | unsigned i; |
| 1004 | for (i = 0; i < ARRAY_SIZE(pdch); i += 1) |
| 1005 | if (slots & (1 << i)) |
| 1006 | pdch[i].unreserve(dir); |
| 1007 | } |