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