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 | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 22 | #include <tbf.h> |
Pau Espin Pedrol | 9d1cdb1 | 2019-09-25 17:47:02 +0200 | [diff] [blame] | 23 | #include <tbf_ul.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> |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 33 | #include <sba.h> |
Oliver Smith | 3f79470 | 2021-08-23 14:19:21 +0200 | [diff] [blame] | 34 | #include <bts_pch_timer.h> |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 35 | |
| 36 | extern "C" { |
| 37 | #include <osmocom/core/talloc.h> |
Holger Hans Peter Freyther | 24e98d0 | 2013-10-19 18:15:44 +0200 | [diff] [blame] | 38 | #include <osmocom/core/msgb.h> |
Holger Hans Peter Freyther | 8df447d | 2015-11-07 21:04:40 +0100 | [diff] [blame] | 39 | #include <osmocom/core/stats.h> |
Max | 9bbe160 | 2016-07-18 12:50:18 +0200 | [diff] [blame] | 40 | #include <osmocom/gsm/protocol/gsm_04_08.h> |
Philipp Maier | 1275a3f | 2017-02-21 19:35:23 +0100 | [diff] [blame] | 41 | #include <osmocom/gsm/gsm_utils.h> |
Vadim Yanitskiy | d6bb619 | 2022-10-26 20:37:53 +0700 | [diff] [blame] | 42 | #include <osmocom/gsm/gsm0502.h> |
Pau Espin Pedrol | fbfab29 | 2019-12-23 13:19:25 +0100 | [diff] [blame] | 43 | #include <osmocom/gsm/gsm48.h> |
Harald Welte | 717cdf5 | 2017-07-21 21:56:23 +0200 | [diff] [blame] | 44 | #include <osmocom/core/gsmtap_util.h> |
Harald Welte | 3e51d3e | 2017-10-29 10:57:27 +0100 | [diff] [blame] | 45 | #include <osmocom/core/application.h> |
Max | 1187a77 | 2018-01-26 13:31:42 +0100 | [diff] [blame] | 46 | #include <osmocom/core/bitvec.h> |
| 47 | #include <osmocom/core/gsmtap.h> |
| 48 | #include <osmocom/core/logging.h> |
| 49 | #include <osmocom/core/utils.h> |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 50 | } |
Holger Hans Peter Freyther | b78adcd | 2013-10-17 20:12:37 +0200 | [diff] [blame] | 51 | |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 52 | #include <errno.h> |
Holger Hans Peter Freyther | b6acfda | 2013-10-17 19:41:11 +0200 | [diff] [blame] | 53 | #include <string.h> |
| 54 | |
Philipp Maier | 1275a3f | 2017-02-21 19:35:23 +0100 | [diff] [blame] | 55 | #define RFN_MODULUS 42432 |
| 56 | #define RFN_THRESHOLD RFN_MODULUS / 2 |
| 57 | |
Holger Hans Peter Freyther | 24e98d0 | 2013-10-19 18:15:44 +0200 | [diff] [blame] | 58 | extern void *tall_pcu_ctx; |
| 59 | |
Harald Welte | 3e51d3e | 2017-10-29 10:57:27 +0100 | [diff] [blame] | 60 | extern "C" { |
| 61 | /* e must make sure to initialize logging before the BTS static |
| 62 | * constructors are executed below, as those call libosmocore APIs that |
| 63 | * require logging already to be initialized. */ |
Harald Welte | 0a369e5 | 2020-09-30 19:57:02 +0200 | [diff] [blame] | 64 | __attribute__((constructor (101))) static void early_init(void) |
Harald Welte | 3e51d3e | 2017-10-29 10:57:27 +0100 | [diff] [blame] | 65 | { |
Neels Hofmeyr | 42f2d61 | 2018-04-01 16:54:40 +0200 | [diff] [blame] | 66 | if (!tall_pcu_ctx) { |
| 67 | tall_pcu_ctx = talloc_named_const(NULL, 1, "Osmo-PCU context"); |
| 68 | osmo_init_logging2(tall_pcu_ctx, &gprs_log_info); |
| 69 | } |
Harald Welte | 3e51d3e | 2017-10-29 10:57:27 +0100 | [diff] [blame] | 70 | } |
| 71 | } |
| 72 | |
Pau Espin Pedrol | 906aafc | 2021-01-18 17:53:29 +0100 | [diff] [blame] | 73 | void bts_trx_free_all_tbf(struct gprs_rlcmac_trx *trx) |
| 74 | { |
| 75 | for (uint8_t ts = 0; ts < 8; ts++) |
| 76 | pdch_free_all_tbf(&trx->pdch[ts]); |
| 77 | } |
| 78 | |
Pau Espin Pedrol | 28f160e | 2019-09-05 14:48:35 +0200 | [diff] [blame] | 79 | static struct osmo_tdef T_defs_bts[] = { |
Neels Hofmeyr | 4163361 | 2021-08-12 14:53:56 +0200 | [diff] [blame] | 80 | { .T=3142, .default_val=20, .unit=OSMO_TDEF_S, .desc="Wait Indication used in Imm Ass Reject during TBF Establishment (CCCH)", .val=0, .min_val = 0, .max_val = 255 }, /* TS 44.018 10.5.2.43, TS 44.060 7.1.3.2.1 (T3172) */ |
| 81 | { .T=3169, .default_val=5, .unit=OSMO_TDEF_S, .desc="Reuse of USF and TFI(s) after the MS uplink TBF assignment is invalid", .val=0 }, |
Neels Hofmeyr | 4163361 | 2021-08-12 14:53:56 +0200 | [diff] [blame] | 82 | { .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", .val=0 }, |
| 83 | { .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", .val=0 }, |
| 84 | { .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", .val=0 }, |
Pau Espin Pedrol | 0dcbc07 | 2021-11-10 19:09:10 +0100 | [diff] [blame] | 85 | { .T = -16, .default_val = 1000, .unit = OSMO_TDEF_MS, |
| 86 | .desc = "Granularity for *:all_allocated rate counters: amount of milliseconds that one counter increment" |
| 87 | " represents. See also X17, X18" }, |
| 88 | { .T = -17, .default_val = 0, .unit = OSMO_TDEF_MS, |
| 89 | .desc = "Rounding threshold for *:all_allocated rate counters: round up to the next counter increment" |
| 90 | " after this many milliseconds. If set to half of X16 (or 0), employ the usual round() behavior:" |
| 91 | " round up after half of a granularity period. If set to 1, behave like ceil(): already" |
| 92 | " increment the counter immediately when all channels are allocated. If set >= X16, behave like" |
| 93 | " floor(): only increment after a full X16 period of all channels being occupied." |
| 94 | " See also X16, X18" }, |
| 95 | { .T = -18, .default_val = 60000, .unit = OSMO_TDEF_MS, |
| 96 | .desc = "Forget-sum period for *:all_allocated rate counters:" |
| 97 | " after this amount of idle time, forget internally cumulated time remainders. Zero to always" |
| 98 | " keep remainders. See also X16, X17." }, |
Pau Espin Pedrol | 5360ef5 | 2019-09-13 12:41:54 +0200 | [diff] [blame] | 99 | { .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] | 100 | }; |
Pau Espin Pedrol | 28f160e | 2019-09-05 14:48:35 +0200 | [diff] [blame] | 101 | |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 102 | /** |
| 103 | * For gcc-4.4 compat do not use extended initializer list but keep the |
| 104 | * order from the enum here. Once we support GCC4.7 and up we can change |
| 105 | * the code below. |
| 106 | */ |
| 107 | static const struct rate_ctr_desc bts_ctr_description[] = { |
Pau Espin Pedrol | 0dcbc07 | 2021-11-10 19:09:10 +0100 | [diff] [blame] | 108 | { "pdch:all_allocated", "Cumulative counter of seconds where all enabled PDCH resources were allocated"}, |
Max | a5eb67d | 2017-11-21 20:24:54 +0100 | [diff] [blame] | 109 | { "tbf:dl:alloc", "TBF DL Allocated "}, |
| 110 | { "tbf:dl:freed", "TBF DL Freed "}, |
| 111 | { "tbf:dl:aborted", "TBF DL Aborted "}, |
| 112 | { "tbf:ul:alloc", "TBF UL Allocated "}, |
| 113 | { "tbf:ul:freed", "TBF UL Freed "}, |
| 114 | { "tbf:ul:aborted", "TBF UL Aborted "}, |
| 115 | { "tbf:reused", "TBF Reused "}, |
| 116 | { "tbf:alloc:algo-a", "TBF Alloc Algo A "}, |
| 117 | { "tbf:alloc:algo-b", "TBF Alloc Algo B "}, |
Pau Espin Pedrol | 9688dc9 | 2021-02-25 18:30:33 +0100 | [diff] [blame] | 118 | { "tbf:alloc:failed", "TBF Alloc Failure (any reason)"}, |
| 119 | { "tbf:alloc:failed:no_tfi", "TBF Alloc Failure (TFIs exhausted)"}, |
| 120 | { "tbf:alloc:failed:no_usf", "TBF Alloc Failure (USFs exhausted)"}, |
| 121 | { "tbf:alloc:failed:no_slot_combi", "TBF Alloc Failure (No valid UL/DL slot combination found)"}, |
| 122 | { "tbf:alloc:failed:no_slot_avail", "TBF Alloc Failure (No slot available)"}, |
Max | a5eb67d | 2017-11-21 20:24:54 +0100 | [diff] [blame] | 123 | { "rlc:sent", "RLC Sent "}, |
| 124 | { "rlc:resent", "RLC Resent "}, |
| 125 | { "rlc:restarted", "RLC Restarted "}, |
| 126 | { "rlc:stalled", "RLC Stalled "}, |
| 127 | { "rlc:nacked", "RLC Nacked "}, |
| 128 | { "rlc:final_block_resent", "RLC Final Blk resent "}, |
| 129 | { "rlc:ass:timedout", "RLC Assign Timeout "}, |
| 130 | { "rlc:ass:failed", "RLC Assign Failed "}, |
| 131 | { "rlc:ack:timedout", "RLC Ack Timeout "}, |
| 132 | { "rlc:ack:failed", "RLC Ack Failed "}, |
| 133 | { "rlc:rel:timedout", "RLC Release Timeout "}, |
| 134 | { "rlc:late-block", "RLC Late Block "}, |
| 135 | { "rlc:sent-dummy", "RLC Sent Dummy "}, |
| 136 | { "rlc:sent-control", "RLC Sent Control "}, |
| 137 | { "rlc:dl_bytes", "RLC DL Bytes "}, |
| 138 | { "rlc:dl_payload_bytes", "RLC DL Payload Bytes "}, |
| 139 | { "rlc:ul_bytes", "RLC UL Bytes "}, |
| 140 | { "rlc:ul_payload_bytes", "RLC UL Payload Bytes "}, |
| 141 | { "decode:errors", "Decode Errors "}, |
| 142 | { "sba:allocated", "SBA Allocated "}, |
| 143 | { "sba:freed", "SBA Freed "}, |
| 144 | { "sba:timedout", "SBA Timeout "}, |
| 145 | { "llc:timeout", "Timedout Frames "}, |
| 146 | { "llc:dropped", "Dropped Frames "}, |
| 147 | { "llc:scheduled", "Scheduled Frames "}, |
| 148 | { "llc:dl_bytes", "RLC encapsulated PDUs"}, |
| 149 | { "llc:ul_bytes", "full PDUs received "}, |
Oliver Smith | 4df959d | 2021-06-24 17:01:41 +0200 | [diff] [blame] | 150 | { "pch:requests", "PCH requests sent "}, |
Pau Espin Pedrol | ef8a730 | 2021-11-08 19:19:25 +0100 | [diff] [blame] | 151 | { "pch:requests:already", "PCH requests on subscriber already being paged"}, |
Oliver Smith | d3c7591 | 2021-07-09 16:37:16 +0200 | [diff] [blame] | 152 | { "pch:requests:timeout", "PCH requests timeout "}, |
Oliver Smith | 4df959d | 2021-06-24 17:01:41 +0200 | [diff] [blame] | 153 | { "rach:requests", "RACH requests received"}, |
Pau Espin Pedrol | 7ce56d7 | 2021-11-02 16:47:06 +0100 | [diff] [blame] | 154 | { "rach:requests:11bit", "11BIT_RACH requests received"}, |
Pau Espin Pedrol | 769e281 | 2021-11-02 16:59:13 +0100 | [diff] [blame] | 155 | { "rach:requests:one_phase", "One phase packet access with request for single TS UL"}, /* TS 52.402 B.2.1.49 */ |
| 156 | { "rach:requests:two_phase", "Single block packet request for two phase packet access"}, /* TS 52.402 B.2.1.49 */ |
Pau Espin Pedrol | 48df600 | 2021-11-02 17:20:59 +0100 | [diff] [blame] | 157 | { "rach:requests:unexpected", "RACH Request with unexpected content received"}, |
Max | a5eb67d | 2017-11-21 20:24:54 +0100 | [diff] [blame] | 158 | { "spb:uplink_first_segment", "First seg of UL SPB "}, |
| 159 | { "spb:uplink_second_segment", "Second seg of UL SPB "}, |
| 160 | { "spb:downlink_first_segment", "First seg of DL SPB "}, |
| 161 | { "spb:downlink_second_segment","Second seg of DL SPB "}, |
| 162 | { "immediate:assignment_UL", "Immediate Assign UL "}, |
Pau Espin Pedrol | dff399f | 2021-11-02 17:46:43 +0100 | [diff] [blame] | 163 | { "immediate:assignment_ul:one_phase", "Immediate Assign UL (one phase packet access)"}, /* TS 52.402 B.2.1.50 */ |
| 164 | { "immediate:assignment_ul:two_phase", "Immediate Assign UL (two phase packet access)"}, /* TS 52.402 B.2.1.50 */ |
Pau Espin Pedrol | ba56831 | 2021-11-02 18:47:44 +0100 | [diff] [blame] | 165 | { "immediate:assignment_ul:contention_resolution_success", "First RLC Block (PDU) on the PDTCH from the MS received"}, /* TS 52.402 B.2.1.51 */ |
Max | a5eb67d | 2017-11-21 20:24:54 +0100 | [diff] [blame] | 166 | { "immediate:assignment_rej", "Immediate Assign Rej "}, |
| 167 | { "immediate:assignment_DL", "Immediate Assign DL "}, |
| 168 | { "channel:request_description","Channel Request Desc "}, |
| 169 | { "pkt:ul_assignment", "Packet UL Assignment "}, |
| 170 | { "pkt:access_reject", "Packet Access Reject "}, |
| 171 | { "pkt:dl_assignment", "Packet DL Assignment "}, |
Pau Espin Pedrol | c0a250d | 2021-01-21 18:46:13 +0100 | [diff] [blame] | 172 | { "pkt:cell_chg_notification", "Packet Cell Change Notification"}, |
| 173 | { "pkt:cell_chg_continue", "Packet Cell Change Continue"}, |
| 174 | { "pkt:neigh_cell_data", "Packet Neighbour Cell Data"}, |
Max | a5eb67d | 2017-11-21 20:24:54 +0100 | [diff] [blame] | 175 | { "ul:control", "UL control Block "}, |
| 176 | { "ul:assignment_poll_timeout", "UL Assign Timeout "}, |
| 177 | { "ul:assignment_failed", "UL Assign Failed "}, |
| 178 | { "dl:assignment_timeout", "DL Assign Timeout "}, |
| 179 | { "dl:assignment_failed", "DL Assign Failed "}, |
| 180 | { "pkt:ul_ack_nack_timeout", "PUAN Poll Timeout "}, |
| 181 | { "pkt:ul_ack_nack_failed", "PUAN poll Failed "}, |
| 182 | { "pkt:dl_ack_nack_timeout", "PDAN poll Timeout "}, |
| 183 | { "pkt:dl_ack_nack_failed", "PDAN poll Failed "}, |
| 184 | { "gprs:downlink_cs1", "CS1 downlink "}, |
| 185 | { "gprs:downlink_cs2", "CS2 downlink "}, |
| 186 | { "gprs:downlink_cs3", "CS3 downlink "}, |
| 187 | { "gprs:downlink_cs4", "CS4 downlink "}, |
| 188 | { "egprs:downlink_mcs1", "MCS1 downlink "}, |
| 189 | { "egprs:downlink_mcs2", "MCS2 downlink "}, |
| 190 | { "egprs:downlink_mcs3", "MCS3 downlink "}, |
| 191 | { "egprs:downlink_mcs4", "MCS4 downlink "}, |
| 192 | { "egprs:downlink_mcs5", "MCS5 downlink "}, |
| 193 | { "egprs:downlink_mcs6", "MCS6 downlink "}, |
| 194 | { "egprs:downlink_mcs7", "MCS7 downlink "}, |
| 195 | { "egprs:downlink_mcs8", "MCS8 downlink "}, |
| 196 | { "egprs:downlink_mcs9", "MCS9 downlink "}, |
| 197 | { "gprs:uplink_cs1", "CS1 Uplink "}, |
| 198 | { "gprs:uplink_cs2", "CS2 Uplink "}, |
| 199 | { "gprs:uplink_cs3", "CS3 Uplink "}, |
| 200 | { "gprs:uplink_cs4", "CS4 Uplink "}, |
| 201 | { "egprs:uplink_mcs1", "MCS1 Uplink "}, |
| 202 | { "egprs:uplink_mcs2", "MCS2 Uplink "}, |
| 203 | { "egprs:uplink_mcs3", "MCS3 Uplink "}, |
| 204 | { "egprs:uplink_mcs4", "MCS4 Uplink "}, |
| 205 | { "egprs:uplink_mcs5", "MCS5 Uplink "}, |
| 206 | { "egprs:uplink_mcs6", "MCS6 Uplink "}, |
| 207 | { "egprs:uplink_mcs7", "MCS7 Uplink "}, |
| 208 | { "egprs:uplink_mcs8", "MCS8 Uplink "}, |
| 209 | { "egprs:uplink_mcs9", "MCS9 Uplink "}, |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 210 | }; |
| 211 | |
| 212 | static const struct rate_ctr_group_desc bts_ctrg_desc = { |
| 213 | "bts", |
| 214 | "BTS Statistics", |
Holger Hans Peter Freyther | b8a5426 | 2015-11-07 21:00:00 +0100 | [diff] [blame] | 215 | OSMO_STATS_CLASS_GLOBAL, |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 216 | ARRAY_SIZE(bts_ctr_description), |
| 217 | bts_ctr_description, |
| 218 | }; |
| 219 | |
Jacob Erlbeck | f5898a0 | 2015-11-27 19:05:13 +0100 | [diff] [blame] | 220 | static const struct osmo_stat_item_desc bts_stat_item_description[] = { |
| 221 | { "ms.present", "MS Present ", |
| 222 | OSMO_STAT_ITEM_NO_UNIT, 4, 0}, |
Oliver Smith | 35d51ca | 2021-09-02 12:23:58 +0200 | [diff] [blame] | 223 | { "pdch.available", "PDCH available ", |
| 224 | OSMO_STAT_ITEM_NO_UNIT, 50, 0}, |
Oliver Smith | 402451b | 2021-09-08 09:33:24 +0200 | [diff] [blame] | 225 | { "pdch.occupied", "PDCH occupied (all) ", |
| 226 | OSMO_STAT_ITEM_NO_UNIT, 50, 0}, |
| 227 | { "pdch.occupied.gprs", "PDCH occupied (GPRS) ", |
| 228 | OSMO_STAT_ITEM_NO_UNIT, 50, 0}, |
| 229 | { "pdch.occupied.egprs","PDCH occupied (EGPRS)", |
Oliver Smith | 35d51ca | 2021-09-02 12:23:58 +0200 | [diff] [blame] | 230 | OSMO_STAT_ITEM_NO_UNIT, 50, 0}, |
Jacob Erlbeck | f5898a0 | 2015-11-27 19:05:13 +0100 | [diff] [blame] | 231 | }; |
| 232 | |
| 233 | static const struct osmo_stat_item_group_desc bts_statg_desc = { |
| 234 | "bts", |
| 235 | "BTS Statistics", |
| 236 | OSMO_STATS_CLASS_GLOBAL, |
| 237 | ARRAY_SIZE(bts_stat_item_description), |
| 238 | bts_stat_item_description, |
| 239 | }; |
| 240 | |
Pau Espin Pedrol | 289f900 | 2021-01-18 12:57:32 +0100 | [diff] [blame] | 241 | static int bts_talloc_destructor(struct gprs_rlcmac_bts* bts) |
Pau Espin Pedrol | 46fd7a0 | 2020-11-02 14:36:22 +0100 | [diff] [blame] | 242 | { |
Pau Espin Pedrol | eb0a052 | 2023-04-17 16:33:35 +0200 | [diff] [blame] | 243 | struct GprsMs *ms; |
Pau Espin Pedrol | b53230a | 2023-04-20 16:42:54 +0200 | [diff] [blame] | 244 | while ((ms = llist_first_entry_or_null(&bts->ms_list, struct GprsMs, list))) |
Pau Espin Pedrol | eb0a052 | 2023-04-17 16:33:35 +0200 | [diff] [blame] | 245 | talloc_free(ms); |
Pau Espin Pedrol | 289f900 | 2021-01-18 12:57:32 +0100 | [diff] [blame] | 246 | |
Pau Espin Pedrol | bf5e3cb | 2022-05-09 16:31:22 +0200 | [diff] [blame] | 247 | gprs_bssgp_destroy(bts); |
| 248 | |
Pau Espin Pedrol | 0dcbc07 | 2021-11-10 19:09:10 +0100 | [diff] [blame] | 249 | osmo_time_cc_cleanup(&bts->all_allocated_pdch); |
| 250 | |
Pau Espin Pedrol | 289f900 | 2021-01-18 12:57:32 +0100 | [diff] [blame] | 251 | if (bts->ratectrs) { |
| 252 | rate_ctr_group_free(bts->ratectrs); |
| 253 | bts->ratectrs = NULL; |
| 254 | } |
| 255 | |
| 256 | if (bts->statg) { |
| 257 | osmo_stat_item_group_free(bts->statg); |
| 258 | bts->statg = NULL; |
| 259 | } |
| 260 | |
| 261 | if (bts->app_info) { |
| 262 | msgb_free(bts->app_info); |
| 263 | bts->app_info = NULL; |
| 264 | } |
Pau Espin Pedrol | d1049dc | 2021-01-18 17:14:14 +0100 | [diff] [blame] | 265 | |
Oliver Smith | 3f79470 | 2021-08-23 14:19:21 +0200 | [diff] [blame] | 266 | bts_pch_timer_stop_all(bts); |
| 267 | |
Pau Espin Pedrol | d1049dc | 2021-01-18 17:14:14 +0100 | [diff] [blame] | 268 | llist_del(&bts->list); |
Pau Espin Pedrol | 289f900 | 2021-01-18 12:57:32 +0100 | [diff] [blame] | 269 | return 0; |
| 270 | } |
| 271 | |
Pau Espin Pedrol | d1049dc | 2021-01-18 17:14:14 +0100 | [diff] [blame] | 272 | struct gprs_rlcmac_bts* bts_alloc(struct gprs_pcu *pcu, uint8_t bts_nr) |
Pau Espin Pedrol | 289f900 | 2021-01-18 12:57:32 +0100 | [diff] [blame] | 273 | { |
| 274 | struct gprs_rlcmac_bts* bts; |
| 275 | bts = talloc_zero(pcu, struct gprs_rlcmac_bts); |
| 276 | if (!bts) |
| 277 | return bts; |
| 278 | talloc_set_destructor(bts, bts_talloc_destructor); |
| 279 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 280 | bts->pcu = pcu; |
Pau Espin Pedrol | d1049dc | 2021-01-18 17:14:14 +0100 | [diff] [blame] | 281 | bts->nr = bts_nr; |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 282 | |
Pau Espin Pedrol | 3a42d17 | 2021-03-10 12:19:04 +0100 | [diff] [blame] | 283 | bts->cur_fn = FN_UNSET; |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 284 | bts->cur_blk_fn = -1; |
| 285 | bts->max_cs_dl = MAX_GPRS_CS; |
| 286 | bts->max_cs_ul = MAX_GPRS_CS; |
| 287 | bts->max_mcs_dl = MAX_EDGE_MCS; |
| 288 | bts->max_mcs_ul = MAX_EDGE_MCS; |
Pau Espin Pedrol | 46fd7a0 | 2020-11-02 14:36:22 +0100 | [diff] [blame] | 289 | bts->initial_cs_dl = bts->initial_cs_ul = 1; |
| 290 | bts->initial_mcs_dl = bts->initial_mcs_ul = 1; |
Pau Espin Pedrol | d87722d | 2020-10-30 17:14:26 +0100 | [diff] [blame] | 291 | bts->cs_mask = 1 << 0; /* CS-1 always enabled by default */ |
Pau Espin Pedrol | 46fd7a0 | 2020-11-02 14:36:22 +0100 | [diff] [blame] | 292 | bts->n3101 = 10; |
| 293 | bts->n3103 = 4; |
| 294 | bts->n3105 = 8; |
Pau Espin Pedrol | 46fd7a0 | 2020-11-02 14:36:22 +0100 | [diff] [blame] | 295 | bts->si13_is_set = false; |
Pau Espin Pedrol | 46fd7a0 | 2020-11-02 14:36:22 +0100 | [diff] [blame] | 296 | |
Pau Espin Pedrol | 46fd7a0 | 2020-11-02 14:36:22 +0100 | [diff] [blame] | 297 | bts->app_info = NULL; |
Pau Espin Pedrol | 46fd7a0 | 2020-11-02 14:36:22 +0100 | [diff] [blame] | 298 | bts->T_defs_bts = T_defs_bts; |
Pau Espin Pedrol | 46fd7a0 | 2020-11-02 14:36:22 +0100 | [diff] [blame] | 299 | osmo_tdefs_reset(bts->T_defs_bts); |
Pau Espin Pedrol | 46fd7a0 | 2020-11-02 14:36:22 +0100 | [diff] [blame] | 300 | |
| 301 | /* initialize back pointers */ |
Pau Espin Pedrol | 702ebee | 2021-03-08 14:15:54 +0100 | [diff] [blame] | 302 | for (size_t trx_no = 0; trx_no < ARRAY_SIZE(bts->trx); ++trx_no) |
| 303 | bts_trx_init(&bts->trx[trx_no], bts, trx_no); |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 304 | |
Max | ea9968f | 2017-12-18 22:52:52 +0100 | [diff] [blame] | 305 | /* The static allocator might have already registered the counter group. |
Max | 1714aea | 2017-12-21 11:19:39 +0100 | [diff] [blame] | 306 | If this happens and we still called explicitly (in tests/ for example) |
Max | ea9968f | 2017-12-18 22:52:52 +0100 | [diff] [blame] | 307 | than just allocate the group with different index. |
| 308 | This shall be removed once weget rid of BTS singleton */ |
| 309 | if (rate_ctr_get_group_by_name_idx(bts_ctrg_desc.group_name_prefix, 0)) |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 310 | bts->ratectrs = rate_ctr_group_alloc(tall_pcu_ctx, &bts_ctrg_desc, 1); |
Max | ea9968f | 2017-12-18 22:52:52 +0100 | [diff] [blame] | 311 | else |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 312 | bts->ratectrs = rate_ctr_group_alloc(tall_pcu_ctx, &bts_ctrg_desc, 0); |
| 313 | OSMO_ASSERT(bts->ratectrs); |
Max | ea9968f | 2017-12-18 22:52:52 +0100 | [diff] [blame] | 314 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 315 | bts->statg = osmo_stat_item_group_alloc(tall_pcu_ctx, &bts_statg_desc, 0); |
| 316 | OSMO_ASSERT(bts->statg); |
Holger Hans Peter Freyther | 9b30c7f | 2013-10-17 19:59:56 +0200 | [diff] [blame] | 317 | |
Pau Espin Pedrol | 0dcbc07 | 2021-11-10 19:09:10 +0100 | [diff] [blame] | 318 | osmo_time_cc_init(&bts->all_allocated_pdch); |
| 319 | struct osmo_time_cc_cfg *cc_cfg = &bts->all_allocated_pdch.cfg; |
| 320 | cc_cfg->gran_usec = 1*1000000, |
| 321 | cc_cfg->forget_sum_usec = 60*1000000, |
| 322 | cc_cfg->rate_ctr = rate_ctr_group_get_ctr(bts->ratectrs, CTR_PDCH_ALL_ALLOCATED), |
| 323 | cc_cfg->T_gran = -16, |
| 324 | cc_cfg->T_round_threshold = -17, |
| 325 | cc_cfg->T_forget_sum = -18, |
| 326 | cc_cfg->T_defs = T_defs_bts, |
| 327 | |
Pau Espin Pedrol | d1049dc | 2021-01-18 17:14:14 +0100 | [diff] [blame] | 328 | llist_add_tail(&bts->list, &pcu->bts_list); |
| 329 | |
Oliver Smith | d3c7591 | 2021-07-09 16:37:16 +0200 | [diff] [blame] | 330 | INIT_LLIST_HEAD(&bts->pch_timer); |
Pau Espin Pedrol | eb0a052 | 2023-04-17 16:33:35 +0200 | [diff] [blame] | 331 | INIT_LLIST_HEAD(&bts->ms_list); |
Oliver Smith | d3c7591 | 2021-07-09 16:37:16 +0200 | [diff] [blame] | 332 | |
Pau Espin Pedrol | 289f900 | 2021-01-18 12:57:32 +0100 | [diff] [blame] | 333 | return bts; |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 334 | } |
| 335 | |
Pau Espin Pedrol | 3a42d17 | 2021-03-10 12:19:04 +0100 | [diff] [blame] | 336 | void bts_set_current_frame_number(struct gprs_rlcmac_bts *bts, uint32_t fn) |
Holger Hans Peter Freyther | 9b30c7f | 2013-10-17 19:59:56 +0200 | [diff] [blame] | 337 | { |
Philipp Maier | 39f5e27 | 2023-01-05 11:55:17 +0100 | [diff] [blame] | 338 | /* See also 3GPP TS 45.002, section 4.3.3 */ |
| 339 | OSMO_ASSERT(fn < GSM_TDMA_HYPERFRAME); |
| 340 | |
Jacob Erlbeck | ac49d09 | 2015-08-27 13:18:24 +0200 | [diff] [blame] | 341 | /* The UL frame numbers lag 3 behind the DL frames and the data |
| 342 | * indication is only sent after all 4 frames of the block have been |
| 343 | * received. Sometimes there is an idle frame between the end of one |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 344 | * and start of another frame (every 3 blocks). */ |
Pau Espin Pedrol | 3a42d17 | 2021-03-10 12:19:04 +0100 | [diff] [blame] | 345 | if (fn != bts->cur_fn && bts->cur_fn != FN_UNSET && fn != fn_next_block(bts->cur_fn)) { |
| 346 | LOGP(DRLCMAC, LOGL_NOTICE, |
Philipp Maier | 6a5b1b1 | 2023-01-05 12:09:51 +0100 | [diff] [blame] | 347 | "Detected FN jump! %u -> %u (expected %u, delta %u)\n", |
| 348 | bts->cur_fn, fn, fn_next_block(bts->cur_fn), GSM_TDMA_FN_DIFF(bts->cur_fn, fn)); |
Pau Espin Pedrol | 3a42d17 | 2021-03-10 12:19:04 +0100 | [diff] [blame] | 349 | } |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 350 | bts->cur_fn = fn; |
Holger Hans Peter Freyther | 9b30c7f | 2013-10-17 19:59:56 +0200 | [diff] [blame] | 351 | } |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 352 | |
Max | 9dabfa2 | 2017-05-16 16:10:45 +0200 | [diff] [blame] | 353 | static inline int delta_fn(int fn, int to) |
| 354 | { |
| 355 | return (fn + GSM_MAX_FN * 3 / 2 - to) % GSM_MAX_FN - GSM_MAX_FN/2; |
| 356 | } |
| 357 | |
Pau Espin Pedrol | fecab50 | 2021-03-17 15:26:37 +0100 | [diff] [blame] | 358 | void bts_set_current_block_frame_number(struct gprs_rlcmac_bts *bts, int fn) |
Jacob Erlbeck | 60f7703 | 2015-08-24 14:35:14 +0200 | [diff] [blame] | 359 | { |
| 360 | int delay = 0; |
| 361 | const int late_block_delay_thresh = 13; |
| 362 | const int fn_update_ok_min_delay = -500; |
| 363 | const int fn_update_ok_max_delay = 0; |
| 364 | |
| 365 | /* frame numbers in the received blocks are assumed to be strongly |
| 366 | * monotonic. */ |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 367 | if (bts->cur_blk_fn >= 0) { |
| 368 | int delta = delta_fn(fn, bts->cur_blk_fn); |
Jacob Erlbeck | 60f7703 | 2015-08-24 14:35:14 +0200 | [diff] [blame] | 369 | if (delta <= 0) |
| 370 | return; |
| 371 | } |
| 372 | |
| 373 | /* Check block delay vs. the current frame number */ |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 374 | if (bts_current_frame_number(bts) != 0) |
| 375 | delay = delta_fn(fn, bts_current_frame_number(bts)); |
Jacob Erlbeck | be4a08b | 2015-08-25 15:19:31 +0200 | [diff] [blame] | 376 | if (delay <= -late_block_delay_thresh) { |
Jacob Erlbeck | 60f7703 | 2015-08-24 14:35:14 +0200 | [diff] [blame] | 377 | LOGP(DRLCMAC, LOGL_NOTICE, |
| 378 | "Late RLC block, FN delta: %d FN: %d curFN: %d\n", |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 379 | delay, fn, bts_current_frame_number(bts)); |
| 380 | bts_do_rate_ctr_inc(bts, CTR_RLC_LATE_BLOCK); |
Jacob Erlbeck | be4a08b | 2015-08-25 15:19:31 +0200 | [diff] [blame] | 381 | } |
Jacob Erlbeck | 60f7703 | 2015-08-24 14:35:14 +0200 | [diff] [blame] | 382 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 383 | bts->cur_blk_fn = fn; |
Jacob Erlbeck | 60f7703 | 2015-08-24 14:35:14 +0200 | [diff] [blame] | 384 | if (delay < fn_update_ok_min_delay || delay > fn_update_ok_max_delay || |
Pau Espin Pedrol | 3a42d17 | 2021-03-10 12:19:04 +0100 | [diff] [blame] | 385 | bts_current_frame_number(bts) == FN_UNSET) |
| 386 | bts_set_current_frame_number(bts, fn); |
Jacob Erlbeck | 60f7703 | 2015-08-24 14:35:14 +0200 | [diff] [blame] | 387 | } |
| 388 | |
Pau Espin Pedrol | bd54205 | 2021-05-13 17:44:51 +0200 | [diff] [blame] | 389 | /* Helper used by bts_add_paging() whenever the target MS is known */ |
| 390 | static void bts_add_paging_known_ms(struct GprsMs *ms, const struct osmo_mobile_identity *mi, uint8_t chan_needed) |
| 391 | { |
| 392 | uint8_t ts; |
| 393 | |
| 394 | if (ms->ul_tbf) { |
| 395 | for (ts = 0; ts < ARRAY_SIZE(ms->ul_tbf->pdch); ts++) { |
| 396 | if (ms->ul_tbf->pdch[ts]) { |
| 397 | LOGPDCH(ms->ul_tbf->pdch[ts], DRLCMAC, LOGL_INFO, |
| 398 | "Paging on PACCH for %s\n", tbf_name(ms->ul_tbf)); |
| 399 | if (!ms->ul_tbf->pdch[ts]->add_paging(chan_needed, mi)) |
| 400 | continue; |
| 401 | return; |
| 402 | } |
| 403 | } |
| 404 | } |
| 405 | if (ms->dl_tbf) { |
| 406 | for (ts = 0; ts < ARRAY_SIZE(ms->dl_tbf->pdch); ts++) { |
| 407 | if (ms->dl_tbf->pdch[ts]) { |
| 408 | LOGPDCH(ms->dl_tbf->pdch[ts], DRLCMAC, LOGL_INFO, |
| 409 | "Paging on PACCH for %s\n", tbf_name(ms->ul_tbf)); |
| 410 | if (!ms->dl_tbf->pdch[ts]->add_paging(chan_needed, mi)) |
| 411 | continue; |
| 412 | return; |
| 413 | } |
| 414 | } |
| 415 | } |
| 416 | LOGPMS(ms, DRLCMAC, LOGL_INFO, "Unable to page on PACCH, no available TBFs\n"); |
| 417 | return; |
| 418 | } |
| 419 | |
| 420 | /* ms is NULL if no specific taget was found */ |
| 421 | int bts_add_paging(struct gprs_rlcmac_bts *bts, const struct paging_req_cs *req, struct GprsMs *ms) |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 422 | { |
| 423 | uint8_t l, trx, ts, any_tbf = 0; |
| 424 | struct gprs_rlcmac_tbf *tbf; |
Pau Espin Pedrol | 9d2fd01 | 2021-05-13 18:34:08 +0200 | [diff] [blame] | 425 | struct llist_head *tmp; |
Pau Espin Pedrol | bd54205 | 2021-05-13 17:44:51 +0200 | [diff] [blame] | 426 | const struct osmo_mobile_identity *mi; |
Pau Espin Pedrol | 478c150 | 2022-12-13 17:47:11 +0100 | [diff] [blame] | 427 | uint8_t slot_mask[ARRAY_SIZE(bts->trx)]; |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 428 | int8_t first_ts; /* must be signed */ |
| 429 | |
Pau Espin Pedrol | bd54205 | 2021-05-13 17:44:51 +0200 | [diff] [blame] | 430 | /* First, build the MI used to page on PDCH from available subscriber info: */ |
| 431 | if (req->mi_tmsi_present) { |
| 432 | mi = &req->mi_tmsi; |
| 433 | } else if (req->mi_imsi_present) { |
| 434 | mi = &req->mi_imsi; |
| 435 | } else { |
| 436 | LOGPMS(ms, DRLCMAC, LOGL_ERROR, "Unable to page on PACCH, no TMSI nor IMSI in request\n"); |
| 437 | return -EINVAL; |
| 438 | } |
| 439 | |
Neels Hofmeyr | 0052051 | 2020-08-21 15:44:58 +0200 | [diff] [blame] | 440 | if (log_check_level(DRLCMAC, LOGL_INFO)) { |
Neels Hofmeyr | 0052051 | 2020-08-21 15:44:58 +0200 | [diff] [blame] | 441 | char str[64]; |
Neels Hofmeyr | 59fc0bd | 2020-08-21 16:21:23 +0200 | [diff] [blame] | 442 | osmo_mobile_identity_to_str_buf(str, sizeof(str), mi); |
Pau Espin Pedrol | bd54205 | 2021-05-13 17:44:51 +0200 | [diff] [blame] | 443 | LOGP(DRLCMAC, LOGL_INFO, "Add RR paging: chan-needed=%d MI=%s\n", req->chan_needed, str); |
Neels Hofmeyr | 0052051 | 2020-08-21 15:44:58 +0200 | [diff] [blame] | 444 | } |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 445 | |
Pau Espin Pedrol | bd54205 | 2021-05-13 17:44:51 +0200 | [diff] [blame] | 446 | /* We known the target MS for the paging req, send the req only on PDCH |
| 447 | * were that target MS is listening (first slot is enough), and we are done. */ |
| 448 | if (ms) { |
| 449 | bts_add_paging_known_ms(ms, mi, req->chan_needed); |
| 450 | return 0; |
| 451 | } |
| 452 | |
| 453 | /* We don't know the target MS. |
| 454 | * collect slots to page |
Pau Espin Pedrol | 9d2fd01 | 2021-05-13 18:34:08 +0200 | [diff] [blame] | 455 | * Mark up to one slot attached to each of the TBF of the MS. |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 456 | * Mark only the first slot found. |
| 457 | * Don't mark, if TBF uses a different slot that is already marked. */ |
| 458 | memset(slot_mask, 0, sizeof(slot_mask)); |
Pau Espin Pedrol | 9d2fd01 | 2021-05-13 18:34:08 +0200 | [diff] [blame] | 459 | |
Pau Espin Pedrol | eb0a052 | 2023-04-17 16:33:35 +0200 | [diff] [blame] | 460 | llist_for_each(tmp, &bts->ms_list) { |
Pau Espin Pedrol | 9d2fd01 | 2021-05-13 18:34:08 +0200 | [diff] [blame] | 461 | ms = llist_entry(tmp, typeof(*ms), list); |
| 462 | struct gprs_rlcmac_tbf *tbfs[] = { ms->ul_tbf, ms->dl_tbf }; |
| 463 | for (l = 0; l < ARRAY_SIZE(tbfs); l++) { |
Pau Espin Pedrol | 1e16e1d | 2022-10-27 15:40:20 +0200 | [diff] [blame] | 464 | tbf = tbfs[l]; |
Pau Espin Pedrol | 9d2fd01 | 2021-05-13 18:34:08 +0200 | [diff] [blame] | 465 | if (!tbf) |
| 466 | continue; |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 467 | first_ts = -1; |
| 468 | for (ts = 0; ts < 8; ts++) { |
| 469 | if (tbf->pdch[ts]) { |
| 470 | /* remember the first slot found */ |
| 471 | if (first_ts < 0) |
| 472 | first_ts = ts; |
| 473 | /* break, if we already marked a slot */ |
Holger Hans Peter Freyther | ec80f82 | 2013-10-27 13:44:37 +0100 | [diff] [blame] | 474 | if ((slot_mask[tbf->trx->trx_no] & (1 << ts))) |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 475 | break; |
| 476 | } |
| 477 | } |
| 478 | /* mark first slot found, if none is marked already */ |
| 479 | if (ts == 8 && first_ts >= 0) { |
Max | c21f007 | 2017-12-15 17:36:45 +0100 | [diff] [blame] | 480 | LOGPTBF(tbf, LOGL_DEBUG, "uses " |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 481 | "TRX=%d TS=%d, so we mark\n", |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 482 | tbf->trx->trx_no, first_ts); |
Holger Hans Peter Freyther | ec80f82 | 2013-10-27 13:44:37 +0100 | [diff] [blame] | 483 | slot_mask[tbf->trx->trx_no] |= (1 << first_ts); |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 484 | } else |
Max | c21f007 | 2017-12-15 17:36:45 +0100 | [diff] [blame] | 485 | LOGPTBF(tbf, LOGL_DEBUG, "uses " |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 486 | "already marked TRX=%d TS=%d\n", |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 487 | tbf->trx->trx_no, ts); |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 488 | } |
| 489 | } |
| 490 | |
| 491 | /* Now we have a list of marked slots. Every TBF uses at least one |
| 492 | * of these slots. */ |
| 493 | |
| 494 | /* schedule paging to all marked slots */ |
| 495 | for (trx = 0; trx < 8; trx++) { |
| 496 | if (slot_mask[trx] == 0) |
| 497 | continue; |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 498 | for (ts = 0; ts < 8; ts++) { |
| 499 | if ((slot_mask[trx] & (1 << ts))) { |
| 500 | /* schedule */ |
Pau Espin Pedrol | bd54205 | 2021-05-13 17:44:51 +0200 | [diff] [blame] | 501 | if (!bts->trx[trx].pdch[ts].add_paging(req->chan_needed, mi)) |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 502 | return -ENOMEM; |
Max | 4382e4e | 2018-01-30 12:00:08 +0100 | [diff] [blame] | 503 | |
Pau Espin Pedrol | 4c51eaf | 2021-05-19 12:02:34 +0200 | [diff] [blame] | 504 | LOGPDCH(&bts->trx[trx].pdch[ts], DRLCMAC, LOGL_INFO, "Paging on PACCH\n"); |
Holger Hans Peter Freyther | 9446485 | 2013-10-19 18:33:52 +0200 | [diff] [blame] | 505 | any_tbf = 1; |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 506 | } |
| 507 | } |
| 508 | } |
| 509 | |
| 510 | if (!any_tbf) |
| 511 | LOGP(DRLCMAC, LOGL_INFO, "No paging, because no TBF\n"); |
| 512 | |
| 513 | return 0; |
| 514 | } |
| 515 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 516 | void bts_send_gsmtap_rach(struct gprs_rlcmac_bts *bts, |
| 517 | enum pcu_gsmtap_category categ, uint8_t channel, |
| 518 | const struct rach_ind_params *rip) |
Vadim Yanitskiy | 07b6487 | 2020-06-11 00:26:15 +0700 | [diff] [blame] | 519 | { |
Vadim Yanitskiy | 55022ea | 2021-01-06 22:44:06 +0100 | [diff] [blame] | 520 | struct pcu_l1_meas meas = { 0 }; |
Vadim Yanitskiy | 81b610e | 2020-06-11 01:04:44 +0700 | [diff] [blame] | 521 | uint8_t ra_buf[2]; |
| 522 | |
| 523 | /* 3GPP TS 44.004 defines 11 bit RA as follows: xxxx xxxx .... .yyy |
| 524 | * On the PCUIF, we get 16 bit machne dependent number (LE/BE) |
| 525 | * Over GSMTAP we send the following: xxxx xxxx yyy. .... |
| 526 | * This simplifies parsing in Wireshark using its CSN.1 codec. */ |
| 527 | if (rip->is_11bit) { |
| 528 | ra_buf[0] = (uint8_t) ((rip->ra >> 3) & 0xff); |
| 529 | ra_buf[1] = (uint8_t) ((rip->ra << 5) & 0xff); |
| 530 | } else { |
| 531 | ra_buf[0] = (uint8_t) (rip->ra & 0xff); |
| 532 | } |
| 533 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 534 | bts_send_gsmtap_meas(bts, categ, true, rip->trx_nr, rip->ts_nr, channel, |
| 535 | bts_rfn_to_fn(bts, rip->rfn), ra_buf, |
Vadim Yanitskiy | 07b6487 | 2020-06-11 00:26:15 +0700 | [diff] [blame] | 536 | rip->is_11bit ? 2 : 1, &meas); |
| 537 | } |
| 538 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 539 | void bts_send_gsmtap(struct gprs_rlcmac_bts *bts, |
| 540 | enum pcu_gsmtap_category categ, bool uplink, uint8_t trx_no, |
| 541 | uint8_t ts_no, uint8_t channel, uint32_t fn, |
| 542 | const uint8_t *data, unsigned int len) |
Harald Welte | 717cdf5 | 2017-07-21 21:56:23 +0200 | [diff] [blame] | 543 | { |
Vadim Yanitskiy | eb70a40 | 2021-01-13 13:58:14 +0100 | [diff] [blame] | 544 | struct pcu_l1_meas meas = { 0 }; |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 545 | bts_send_gsmtap_meas(bts, categ, uplink, trx_no, ts_no, channel, fn, data, len, &meas); |
Pau Espin Pedrol | 0b0391f | 2020-05-19 17:23:23 +0200 | [diff] [blame] | 546 | } |
| 547 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 548 | void bts_send_gsmtap_meas(struct gprs_rlcmac_bts *bts, |
| 549 | enum pcu_gsmtap_category categ, bool uplink, uint8_t trx_no, |
| 550 | uint8_t ts_no, uint8_t channel, uint32_t fn, |
| 551 | const uint8_t *data, unsigned int len, struct pcu_l1_meas *meas) |
Pau Espin Pedrol | 0b0391f | 2020-05-19 17:23:23 +0200 | [diff] [blame] | 552 | { |
Harald Welte | 717cdf5 | 2017-07-21 21:56:23 +0200 | [diff] [blame] | 553 | uint16_t arfcn; |
| 554 | |
| 555 | /* check if category is activated at all */ |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 556 | if (!(bts->pcu->gsmtap_categ_mask & (1 << categ))) |
Harald Welte | 717cdf5 | 2017-07-21 21:56:23 +0200 | [diff] [blame] | 557 | return; |
| 558 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 559 | arfcn = bts->trx[trx_no].arfcn; |
Harald Welte | 717cdf5 | 2017-07-21 21:56:23 +0200 | [diff] [blame] | 560 | if (uplink) |
| 561 | arfcn |= GSMTAP_ARFCN_F_UPLINK; |
| 562 | |
Pau Espin Pedrol | 0b0391f | 2020-05-19 17:23:23 +0200 | [diff] [blame] | 563 | /* GSMTAP needs the SNR here, but we only have C/I (meas->link_qual). |
| 564 | Those are not the same, but there is no known way to convert them, |
| 565 | let's pass C/I instead of nothing */ |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 566 | gsmtap_send(bts->pcu->gsmtap, arfcn, ts_no, channel, 0, fn, |
Pau Espin Pedrol | 0b0391f | 2020-05-19 17:23:23 +0200 | [diff] [blame] | 567 | meas->rssi, meas->link_qual, data, len); |
Harald Welte | 717cdf5 | 2017-07-21 21:56:23 +0200 | [diff] [blame] | 568 | } |
| 569 | |
Daniel Willmann | 54044b0 | 2014-07-02 17:58:15 +0200 | [diff] [blame] | 570 | /* lookup downlink TBF Entity (by TFI) */ |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 571 | struct gprs_rlcmac_dl_tbf *bts_dl_tbf_by_tfi(struct gprs_rlcmac_bts *bts, uint8_t tfi, uint8_t trx, uint8_t ts) |
Daniel Willmann | 54044b0 | 2014-07-02 17:58:15 +0200 | [diff] [blame] | 572 | { |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 573 | if (trx >= 8 || ts >= 8) |
| 574 | return NULL; |
| 575 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 576 | return bts->trx[trx].pdch[ts].dl_tbf_by_tfi(tfi); |
Daniel Willmann | 54044b0 | 2014-07-02 17:58:15 +0200 | [diff] [blame] | 577 | } |
| 578 | |
| 579 | /* lookup uplink TBF Entity (by TFI) */ |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 580 | struct gprs_rlcmac_ul_tbf *bts_ul_tbf_by_tfi(struct gprs_rlcmac_bts *bts, uint8_t tfi, uint8_t trx, uint8_t ts) |
Daniel Willmann | 54044b0 | 2014-07-02 17:58:15 +0200 | [diff] [blame] | 581 | { |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 582 | if (trx >= 8 || ts >= 8) |
Holger Hans Peter Freyther | f63cabd | 2013-10-26 19:10:43 +0200 | [diff] [blame] | 583 | return NULL; |
| 584 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 585 | return bts->trx[trx].pdch[ts].ul_tbf_by_tfi(tfi); |
Holger Hans Peter Freyther | f63cabd | 2013-10-26 19:10:43 +0200 | [diff] [blame] | 586 | } |
| 587 | |
Pau Espin Pedrol | 983bb7e | 2020-10-26 14:52:06 +0100 | [diff] [blame] | 588 | static unsigned int trx_count_free_tfi(const struct gprs_rlcmac_trx *trx, enum gprs_rlcmac_tbf_direction dir, uint8_t *first_free_tfi) |
| 589 | { |
| 590 | const struct gprs_rlcmac_pdch *pdch; |
| 591 | uint8_t ts; |
| 592 | unsigned int i; |
| 593 | unsigned int free_tfi_cnt = 0; |
| 594 | bool has_pdch = false; |
| 595 | uint32_t mask = NO_FREE_TFI; |
| 596 | |
| 597 | for (ts = 0; ts < ARRAY_SIZE(trx->pdch); ts++) { |
| 598 | pdch = &trx->pdch[ts]; |
| 599 | if (!pdch->is_enabled()) |
| 600 | continue; |
| 601 | has_pdch = true; |
| 602 | mask &= ~pdch->assigned_tfi(dir); |
| 603 | } |
| 604 | |
| 605 | if (!has_pdch || !mask) { |
| 606 | *first_free_tfi = (uint8_t)-1; |
| 607 | return 0; |
| 608 | } |
| 609 | |
| 610 | /* Count free tfis and return */ |
| 611 | for (i = 0; i < sizeof(mask) * 8 ; i++) { |
| 612 | if (mask & 1) { |
| 613 | if (free_tfi_cnt == 0) |
| 614 | *first_free_tfi = i; |
| 615 | free_tfi_cnt++; |
| 616 | } |
| 617 | mask >>= 1; |
| 618 | } |
| 619 | return free_tfi_cnt; |
| 620 | } |
| 621 | |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 622 | /* |
Pau Espin Pedrol | 983bb7e | 2020-10-26 14:52:06 +0100 | [diff] [blame] | 623 | * Search for free TFI and return TFI, TRX. This method returns the first TFI |
| 624 | * that is currently not used in any PDCH of a the TRX with least TFIs currently |
| 625 | * assigned. Negative values indicate errors. |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 626 | */ |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 627 | int bts_tfi_find_free(const struct gprs_rlcmac_bts *bts, enum gprs_rlcmac_tbf_direction dir, |
| 628 | uint8_t *_trx, int8_t use_trx) |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 629 | { |
Pau Espin Pedrol | 983bb7e | 2020-10-26 14:52:06 +0100 | [diff] [blame] | 630 | uint8_t trx_from, trx_to, trx; |
| 631 | uint8_t best_trx_nr = 0xff; |
| 632 | unsigned int best_cnt = 0; |
| 633 | uint8_t best_first_tfi = 0; |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 634 | |
Pau Espin Pedrol | 0d957d8 | 2022-12-16 12:54:12 +0100 | [diff] [blame] | 635 | if (use_trx >= 0 && use_trx < (int8_t)ARRAY_SIZE(bts->trx)) |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 636 | trx_from = trx_to = use_trx; |
| 637 | else { |
| 638 | trx_from = 0; |
| 639 | trx_to = 7; |
| 640 | } |
| 641 | |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 642 | /* find a TFI that is unused on all PDCH */ |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 643 | for (trx = trx_from; trx <= trx_to; trx++) { |
Pau Espin Pedrol | 983bb7e | 2020-10-26 14:52:06 +0100 | [diff] [blame] | 644 | uint8_t tmp_first_tfi; |
| 645 | unsigned int tmp_cnt; |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 646 | tmp_cnt = trx_count_free_tfi(&bts->trx[trx], dir, &tmp_first_tfi); |
Pau Espin Pedrol | 983bb7e | 2020-10-26 14:52:06 +0100 | [diff] [blame] | 647 | if (tmp_cnt > best_cnt) { |
| 648 | best_cnt = tmp_cnt; |
| 649 | best_first_tfi = tmp_first_tfi; |
| 650 | best_trx_nr = trx; |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 651 | } |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 652 | } |
| 653 | |
Pau Espin Pedrol | 983bb7e | 2020-10-26 14:52:06 +0100 | [diff] [blame] | 654 | if (best_trx_nr == 0xff || best_cnt == 0) { |
Max | 69d585e | 2018-01-26 12:36:43 +0100 | [diff] [blame] | 655 | LOGP(DRLCMAC, LOGL_NOTICE, "No TFI available (suggested TRX: %d).\n", use_trx); |
Pau Espin Pedrol | 9688dc9 | 2021-02-25 18:30:33 +0100 | [diff] [blame] | 656 | bts_do_rate_ctr_inc(bts, CTR_TBF_ALLOC_FAIL_NO_TFI); |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 657 | return -EBUSY; |
| 658 | } |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 659 | |
Pau Espin Pedrol | 983bb7e | 2020-10-26 14:52:06 +0100 | [diff] [blame] | 660 | OSMO_ASSERT(best_first_tfi < 32); |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 661 | |
Pau Espin Pedrol | 983bb7e | 2020-10-26 14:52:06 +0100 | [diff] [blame] | 662 | LOGP(DRLCMAC, LOGL_DEBUG, "Found first unallocated TRX=%d TFI=%d\n", |
| 663 | best_trx_nr, best_first_tfi); |
| 664 | *_trx = best_trx_nr; |
| 665 | return best_first_tfi; |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 666 | } |
| 667 | |
Philipp Maier | 7c3fd98 | 2023-02-01 16:10:52 +0100 | [diff] [blame] | 668 | static int tlli_from_imm_ass(uint32_t *tlli, const uint8_t *data, uint32_t fn) |
Holger Hans Peter Freyther | 40cfaa6 | 2013-10-26 19:49:16 +0200 | [diff] [blame] | 669 | { |
Pau Espin Pedrol | bee29f4 | 2022-10-14 17:01:22 +0200 | [diff] [blame] | 670 | const struct gsm48_imm_ass *imm_ass = (struct gsm48_imm_ass *)data; |
Holger Hans Peter Freyther | 40cfaa6 | 2013-10-26 19:49:16 +0200 | [diff] [blame] | 671 | uint8_t plen; |
Holger Hans Peter Freyther | 40cfaa6 | 2013-10-26 19:49:16 +0200 | [diff] [blame] | 672 | |
Pau Espin Pedrol | bee29f4 | 2022-10-14 17:01:22 +0200 | [diff] [blame] | 673 | /* Move to IA Rest Octets: TS 44.018 9.1.18 "The L2 pseudo length of |
| 674 | * this message is the sum of lengths of all information elements |
| 675 | * present in the message except the IA Rest Octets and L2 Pseudo Length |
| 676 | * information elements." */ |
| 677 | /* TS 44.018 10.5.2.19 l2_plen byte lowest 2 bits are '01'B */ |
| 678 | plen = imm_ass->l2_plen >> 2; |
Holger Hans Peter Freyther | 40cfaa6 | 2013-10-26 19:49:16 +0200 | [diff] [blame] | 679 | data += 1 + plen; |
| 680 | |
| 681 | if ((*data & 0xf0) != 0xd0) { |
Pau Espin Pedrol | 940e595 | 2022-10-12 16:36:46 +0200 | [diff] [blame] | 682 | LOGP(DTBFDL, LOGL_ERROR, "FN=%u Got IMM.ASS confirm, but rest " |
Holger Hans Peter Freyther | 40cfaa6 | 2013-10-26 19:49:16 +0200 | [diff] [blame] | 683 | "octets do not start with bit sequence 'HH01' " |
Pau Espin Pedrol | 940e595 | 2022-10-12 16:36:46 +0200 | [diff] [blame] | 684 | "(Packet Downlink Assignment)\n", fn); |
Holger Hans Peter Freyther | 40cfaa6 | 2013-10-26 19:49:16 +0200 | [diff] [blame] | 685 | return -EINVAL; |
| 686 | } |
| 687 | |
| 688 | /* get TLLI from downlink assignment */ |
Philipp Maier | 7c3fd98 | 2023-02-01 16:10:52 +0100 | [diff] [blame] | 689 | *tlli = (uint32_t)((*data++) & 0xf) << 28; |
| 690 | *tlli |= (*data++) << 20; |
| 691 | *tlli |= (*data++) << 12; |
| 692 | *tlli |= (*data++) << 4; |
| 693 | *tlli |= (*data++) >> 4; |
Holger Hans Peter Freyther | 40cfaa6 | 2013-10-26 19:49:16 +0200 | [diff] [blame] | 694 | |
Philipp Maier | 7c3fd98 | 2023-02-01 16:10:52 +0100 | [diff] [blame] | 695 | return 0; |
| 696 | } |
| 697 | |
| 698 | int bts_rcv_imm_ass_cnf(struct gprs_rlcmac_bts *bts, const uint8_t *data, uint32_t tlli, uint32_t fn) |
| 699 | { |
| 700 | struct gprs_rlcmac_dl_tbf *dl_tbf; |
| 701 | GprsMs *ms; |
| 702 | int rc; |
| 703 | |
| 704 | /* NOTE: A confirmation for a downlink IMMEDIATE ASSIGNMENT can be received using two different methods. |
| 705 | * One way is to send the whole IMMEDIATE ASSIGNMENT back to the PCU and the TLLI, which we use as |
| 706 | * reference is extracted from the rest octets of this message. Alternatively the TLLI may be sent as |
| 707 | * confirmation directly. */ |
| 708 | |
| 709 | /* Extract TLLI from the presented IMMEDIATE ASSIGNMENT |
| 710 | * (if present and only when TLLI that is supplied as function parameter is valid.) */ |
| 711 | if (data && tlli == GSM_RESERVED_TMSI) { |
| 712 | rc = tlli_from_imm_ass(&tlli, data, fn); |
| 713 | if (rc != 0) |
| 714 | return -EINVAL; |
| 715 | } |
| 716 | |
| 717 | /* Make sure TLLI is valid */ |
| 718 | if (tlli == GSM_RESERVED_TMSI) { |
| 719 | LOGP(DTBFDL, LOGL_ERROR, "FN=%u Got IMM.ASS confirm, but TLLI is invalid!\n", fn); |
| 720 | return -EINVAL; |
| 721 | } |
| 722 | |
| 723 | /* Find related TBF and send confirmation signal to FSM */ |
Pau Espin Pedrol | cde18c5 | 2023-04-17 18:16:48 +0200 | [diff] [blame] | 724 | ms = bts_get_ms_by_tlli(bts, tlli, GSM_RESERVED_TMSI); |
Pau Espin Pedrol | 940e595 | 2022-10-12 16:36:46 +0200 | [diff] [blame] | 725 | if (!ms) { |
| 726 | LOGP(DTBFDL, LOGL_ERROR, "FN=%u Got IMM.ASS confirm for unknown MS with TLLI=%08x\n", fn, tlli); |
| 727 | return -EINVAL; |
| 728 | } |
| 729 | dl_tbf = ms_dl_tbf(ms); |
Daniel Willmann | 1dac2eb | 2014-08-07 12:37:34 +0200 | [diff] [blame] | 730 | if (!dl_tbf) { |
Pau Espin Pedrol | 940e595 | 2022-10-12 16:36:46 +0200 | [diff] [blame] | 731 | LOGPMS(ms, DTBFDL, LOGL_ERROR, "FN=%u Got IMM.ASS confirm, but MS has no DL TBF!\n", fn); |
Holger Hans Peter Freyther | 40cfaa6 | 2013-10-26 19:49:16 +0200 | [diff] [blame] | 732 | return -EINVAL; |
| 733 | } |
| 734 | |
Pau Espin Pedrol | 940e595 | 2022-10-12 16:36:46 +0200 | [diff] [blame] | 735 | LOGPTBFDL(dl_tbf, LOGL_DEBUG, "FN=%u Got IMM.ASS confirm\n", fn); |
Pau Espin Pedrol | f197f15 | 2022-11-17 20:18:46 +0100 | [diff] [blame] | 736 | osmo_fsm_inst_dispatch(dl_tbf->state_fi, TBF_EV_ASSIGN_PCUIF_CNF, NULL); |
Holger Hans Peter Freyther | 40cfaa6 | 2013-10-26 19:49:16 +0200 | [diff] [blame] | 737 | |
| 738 | return 0; |
| 739 | } |
| 740 | |
Philipp Maier | 1275a3f | 2017-02-21 19:35:23 +0100 | [diff] [blame] | 741 | /* Determine the full frame number from a relative frame number */ |
Philipp Maier | a42521d | 2023-01-05 12:04:55 +0100 | [diff] [blame] | 742 | uint32_t bts_rfn_to_fn(const struct gprs_rlcmac_bts *bts, uint32_t rfn) |
Philipp Maier | 1275a3f | 2017-02-21 19:35:23 +0100 | [diff] [blame] | 743 | { |
Philipp Maier | a42521d | 2023-01-05 12:04:55 +0100 | [diff] [blame] | 744 | uint32_t m_cur_rfn; |
| 745 | uint32_t fn_rounded; |
Max | 5dd8d1b | 2017-03-08 12:06:42 +0100 | [diff] [blame] | 746 | |
Philipp Maier | a42521d | 2023-01-05 12:04:55 +0100 | [diff] [blame] | 747 | /* make sure RFN does not exceed the maximum possible value of a valid |
| 748 | * GSM frame number. */ |
Max | 5dd8d1b | 2017-03-08 12:06:42 +0100 | [diff] [blame] | 749 | OSMO_ASSERT(rfn < GSM_MAX_FN); |
Philipp Maier | 1275a3f | 2017-02-21 19:35:23 +0100 | [diff] [blame] | 750 | |
| 751 | /* Note: If a BTS is sending in a rach request it will be fully aware |
| 752 | * of the frame number. If the PCU is used in a BSC-co-located setup. |
| 753 | * The BSC will forward the incoming RACH request. The RACH request |
| 754 | * only contains the relative frame number (Fn % 42432) in its request |
| 755 | * reference. This PCU implementation has to fit both scenarios, so |
| 756 | * we need to assume that Fn is a relative frame number. */ |
| 757 | |
| 758 | /* Ensure that all following calculations are performed with the |
| 759 | * relative frame number */ |
Max | 5dd8d1b | 2017-03-08 12:06:42 +0100 | [diff] [blame] | 760 | if (rfn >= RFN_MODULUS) |
| 761 | return rfn; |
Philipp Maier | 1275a3f | 2017-02-21 19:35:23 +0100 | [diff] [blame] | 762 | |
| 763 | /* Compute an internal relative frame number from the full internal |
| 764 | frame number */ |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 765 | m_cur_rfn = bts->cur_fn % RFN_MODULUS; |
Philipp Maier | 1275a3f | 2017-02-21 19:35:23 +0100 | [diff] [blame] | 766 | |
| 767 | /* Compute a "rounded" version of the internal frame number, which |
| 768 | * exactly fits in the RFN_MODULUS raster */ |
Philipp Maier | a42521d | 2023-01-05 12:04:55 +0100 | [diff] [blame] | 769 | fn_rounded = GSM_TDMA_FN_SUB(bts->cur_fn, m_cur_rfn); |
Philipp Maier | 1275a3f | 2017-02-21 19:35:23 +0100 | [diff] [blame] | 770 | |
| 771 | /* If the delta between the internal and the external relative frame |
| 772 | * number exceeds a certain limit, we need to assume that the incoming |
| 773 | * rach request belongs to a the previous rfn period. To correct this, |
| 774 | * we roll back the rounded frame number by one RFN_MODULUS */ |
Philipp Maier | a42521d | 2023-01-05 12:04:55 +0100 | [diff] [blame] | 775 | if (GSM_TDMA_FN_DIFF(rfn, m_cur_rfn) > RFN_THRESHOLD) { |
Philipp Maier | 1275a3f | 2017-02-21 19:35:23 +0100 | [diff] [blame] | 776 | LOGP(DRLCMAC, LOGL_DEBUG, |
Thorsten Alteholz | 8bb7904 | 2018-10-06 10:42:58 +0200 | [diff] [blame] | 777 | "Race condition between rfn (%u) and m_cur_fn (%u) detected: rfn belongs to the previous modulus %u cycle, wrapping...\n", |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 778 | rfn, bts->cur_fn, RFN_MODULUS); |
Philipp Maier | 1275a3f | 2017-02-21 19:35:23 +0100 | [diff] [blame] | 779 | if (fn_rounded < RFN_MODULUS) { |
| 780 | LOGP(DRLCMAC, LOGL_DEBUG, |
| 781 | "Cornercase detected: wrapping crosses %u border\n", |
| 782 | GSM_MAX_FN); |
Philipp Maier | a42521d | 2023-01-05 12:04:55 +0100 | [diff] [blame] | 783 | fn_rounded = GSM_TDMA_FN_SUB(GSM_MAX_FN, (GSM_TDMA_FN_SUB(RFN_MODULUS, fn_rounded))); |
Philipp Maier | 1275a3f | 2017-02-21 19:35:23 +0100 | [diff] [blame] | 784 | } |
| 785 | else |
Philipp Maier | a42521d | 2023-01-05 12:04:55 +0100 | [diff] [blame] | 786 | fn_rounded = GSM_TDMA_FN_SUB(fn_rounded, RFN_MODULUS); |
Philipp Maier | 1275a3f | 2017-02-21 19:35:23 +0100 | [diff] [blame] | 787 | } |
| 788 | |
| 789 | /* The real frame number is the sum of the rounded frame number and the |
| 790 | * relative framenumber computed via RACH */ |
Philipp Maier | a42521d | 2023-01-05 12:04:55 +0100 | [diff] [blame] | 791 | return GSM_TDMA_FN_SUM(fn_rounded, rfn); |
Philipp Maier | 1275a3f | 2017-02-21 19:35:23 +0100 | [diff] [blame] | 792 | } |
| 793 | |
Pau Espin Pedrol | 9ee90d2 | 2020-05-08 14:20:32 +0200 | [diff] [blame] | 794 | /* 3GPP TS 44.060: |
Vadim Yanitskiy | a0a0b7f | 2020-05-21 19:55:46 +0700 | [diff] [blame] | 795 | * Table 11.2.5.2: PACKET CHANNEL REQUEST |
| 796 | * Table 11.2.5a.2: EGPRS PACKET CHANNEL REQUEST |
| 797 | * Both GPRS and EGPRS use same MultislotClass coding, but since PRACH is |
Pau Espin Pedrol | 9ee90d2 | 2020-05-08 14:20:32 +0200 | [diff] [blame] | 798 | * deprecated, no PACKET CHANNEL REQUEST exists, which means for GPRS we will |
| 799 | * receive CCCH RACH which doesn't contain any mslot class. Hence in the end we |
Vadim Yanitskiy | a0a0b7f | 2020-05-21 19:55:46 +0700 | [diff] [blame] | 800 | * can only receive EGPRS mslot class through 11-bit EGPRS PACKET CHANNEL REQUEST. */ |
| 801 | static int parse_egprs_pkt_ch_req(uint16_t ra11, struct chan_req_params *chan_req) |
Max | 5881858 | 2018-01-05 15:04:50 +0100 | [diff] [blame] | 802 | { |
Vadim Yanitskiy | b90d34b | 2020-05-21 20:20:34 +0700 | [diff] [blame] | 803 | EGPRS_PacketChannelRequest_t req; |
| 804 | int rc; |
| 805 | |
| 806 | rc = decode_egprs_pkt_ch_req(ra11, &req); |
| 807 | if (rc) { |
| 808 | LOGP(DRLCMAC, LOGL_NOTICE, "Failed to decode " |
| 809 | "EGPRS Packet Channel Request: rc=%d\n", rc); |
| 810 | return rc; |
| 811 | } |
| 812 | |
| 813 | LOGP(DRLCMAC, LOGL_INFO, "Rx EGPRS Packet Channel Request: %s\n", |
| 814 | get_value_string(egprs_pkt_ch_req_type_names, req.Type)); |
| 815 | |
| 816 | switch (req.Type) { |
| 817 | case EGPRS_PKT_CHAN_REQ_ONE_PHASE: |
| 818 | chan_req->egprs_mslot_class = req.Content.MultislotClass + 1; |
| 819 | chan_req->priority = req.Content.Priority + 1; |
| 820 | break; |
| 821 | case EGPRS_PKT_CHAN_REQ_SHORT: |
| 822 | chan_req->priority = req.Content.Priority + 1; |
| 823 | if (req.Content.NumberOfBlocks == 0) |
| 824 | chan_req->single_block = true; |
| 825 | break; |
| 826 | case EGPRS_PKT_CHAN_REQ_ONE_PHASE_RED_LATENCY: |
| 827 | chan_req->priority = req.Content.Priority + 1; |
| 828 | break; |
| 829 | /* Two phase access => single block is needed */ |
| 830 | case EGPRS_PKT_CHAN_REQ_TWO_PHASE: |
| 831 | case EGPRS_PKT_CHAN_REQ_TWO_PHASE_IPA: |
| 832 | chan_req->priority = req.Content.Priority + 1; |
| 833 | chan_req->single_block = true; |
| 834 | break; |
| 835 | /* Signalling => single block is needed */ |
| 836 | case EGPRS_PKT_CHAN_REQ_SIGNALLING: |
| 837 | case EGPRS_PKT_CHAN_REQ_SIGNALLING_IPA: |
| 838 | chan_req->single_block = true; |
| 839 | break; |
| 840 | |
| 841 | /* Neither unacknowledged RLC mode, nor emergency calls are supported */ |
| 842 | case EGPRS_PKT_CHAN_REQ_ONE_PHASE_UNACK: |
| 843 | case EGPRS_PKT_CHAN_REQ_EMERGENCY_CALL: |
| 844 | case EGPRS_PKT_CHAN_REQ_DEDICATED_CHANNEL: |
| 845 | LOGP(DRLCMAC, LOGL_NOTICE, "%s is not supported, rejecting\n", |
| 846 | get_value_string(egprs_pkt_ch_req_type_names, req.Type)); |
| 847 | return -ENOTSUP; |
| 848 | |
| 849 | default: |
| 850 | LOGP(DRLCMAC, LOGL_ERROR, "Unknown EGPRS Packet Channel Request " |
| 851 | "type=0x%02x, probably a bug in CSN.1 codec\n", req.Type); |
| 852 | return -EINVAL; |
| 853 | } |
Max | 5881858 | 2018-01-05 15:04:50 +0100 | [diff] [blame] | 854 | |
| 855 | return 0; |
| 856 | } |
| 857 | |
Vadim Yanitskiy | a0a0b7f | 2020-05-21 19:55:46 +0700 | [diff] [blame] | 858 | /* NOTE: chan_req needs to be zero-initialized by the caller */ |
| 859 | static int parse_rach_ind(const struct rach_ind_params *rip, |
| 860 | struct chan_req_params *chan_req) |
Max | 5881858 | 2018-01-05 15:04:50 +0100 | [diff] [blame] | 861 | { |
Vadim Yanitskiy | a0a0b7f | 2020-05-21 19:55:46 +0700 | [diff] [blame] | 862 | int rc; |
Max | 5881858 | 2018-01-05 15:04:50 +0100 | [diff] [blame] | 863 | |
Vadim Yanitskiy | a0a0b7f | 2020-05-21 19:55:46 +0700 | [diff] [blame] | 864 | switch (rip->burst_type) { |
Max | 137fd59 | 2018-01-05 15:53:08 +0100 | [diff] [blame] | 865 | case GSM_L1_BURST_TYPE_NONE: |
Vadim Yanitskiy | a0a0b7f | 2020-05-21 19:55:46 +0700 | [diff] [blame] | 866 | LOGP(DRLCMAC, LOGL_ERROR, "RACH.ind contains no burst type, assuming TS0\n"); |
| 867 | /* fall-through */ |
| 868 | case GSM_L1_BURST_TYPE_ACCESS_0: |
| 869 | if (rip->is_11bit) { /* 11 bit Access Burst with TS0 => Packet Channel Request */ |
| 870 | LOGP(DRLCMAC, LOGL_ERROR, "11 bit Packet Channel Request " |
| 871 | "is not supported (PBCCH is deprecated)\n"); |
| 872 | return -ENOTSUP; |
| 873 | } |
| 874 | |
| 875 | /* 3GPP TS 44.018, table 9.1.8.1: 8 bit CHANNEL REQUEST. |
| 876 | * Mask 01110xxx indicates single block packet access. */ |
| 877 | chan_req->single_block = ((rip->ra & 0xf8) == 0x70); |
| 878 | break; |
| 879 | case GSM_L1_BURST_TYPE_ACCESS_1: |
| 880 | case GSM_L1_BURST_TYPE_ACCESS_2: |
| 881 | if (!rip->is_11bit) { /* TS1/TS2 => EGPRS Packet Channel Request (always 11 bit) */ |
| 882 | LOGP(DRLCMAC, LOGL_ERROR, "11 bit Packet Channel Request " |
| 883 | "is not supported (PBCCH is deprecated)\n"); |
| 884 | return -ENOTSUP; |
| 885 | } |
| 886 | |
| 887 | rc = parse_egprs_pkt_ch_req(rip->ra, chan_req); |
| 888 | if (rc) |
| 889 | return rc; |
Max | 137fd59 | 2018-01-05 15:53:08 +0100 | [diff] [blame] | 890 | break; |
| 891 | default: |
Vadim Yanitskiy | a0a0b7f | 2020-05-21 19:55:46 +0700 | [diff] [blame] | 892 | LOGP(DRLCMAC, LOGL_ERROR, "RACH.ind contains unknown burst type 0x%02x " |
| 893 | "(%u bit)\n", rip->burst_type, rip->is_11bit ? 11 : 8); |
| 894 | return -EINVAL; |
Max | 5881858 | 2018-01-05 15:04:50 +0100 | [diff] [blame] | 895 | } |
| 896 | |
Vadim Yanitskiy | a0a0b7f | 2020-05-21 19:55:46 +0700 | [diff] [blame] | 897 | return 0; |
Max | 5881858 | 2018-01-05 15:04:50 +0100 | [diff] [blame] | 898 | } |
| 899 | |
Pau Espin Pedrol | 15c58ac | 2021-03-08 14:57:58 +0100 | [diff] [blame] | 900 | struct gprs_rlcmac_sba *bts_alloc_sba(struct gprs_rlcmac_bts *bts, uint8_t ta) |
| 901 | { |
| 902 | struct gprs_rlcmac_pdch *pdch; |
| 903 | struct gprs_rlcmac_sba *sba = NULL; |
| 904 | int8_t trx, ts; |
| 905 | |
| 906 | if (!gsm48_ta_is_valid(ta)) |
| 907 | return NULL; |
| 908 | |
| 909 | for (trx = 0; trx < 8; trx++) { |
| 910 | for (ts = 7; ts >= 0; ts--) { |
| 911 | pdch = &bts->trx[trx].pdch[ts]; |
| 912 | if (!pdch->is_enabled()) |
| 913 | continue; |
| 914 | break; |
| 915 | } |
| 916 | if (ts >= 0) |
| 917 | break; |
| 918 | } |
| 919 | if (trx == 8) { |
| 920 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH available.\n"); |
| 921 | return NULL; |
| 922 | } |
| 923 | |
| 924 | sba = sba_alloc(bts, pdch, ta); |
| 925 | if (!sba) |
| 926 | return NULL; |
| 927 | |
| 928 | bts_do_rate_ctr_inc(bts, CTR_SBA_ALLOCATED); |
| 929 | return sba; |
| 930 | } |
| 931 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 932 | int bts_rcv_rach(struct gprs_rlcmac_bts *bts, const struct rach_ind_params *rip) |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 933 | { |
Vadim Yanitskiy | a0a0b7f | 2020-05-21 19:55:46 +0700 | [diff] [blame] | 934 | struct chan_req_params chan_req = { 0 }; |
Jacob Erlbeck | 1f33294 | 2015-05-04 08:21:17 +0200 | [diff] [blame] | 935 | struct gprs_rlcmac_ul_tbf *tbf = NULL; |
Pau Espin Pedrol | 15c58ac | 2021-03-08 14:57:58 +0100 | [diff] [blame] | 936 | struct gprs_rlcmac_sba *sba; |
Pau Espin Pedrol | f5cb4ac | 2021-10-18 13:29:56 +0200 | [diff] [blame] | 937 | struct gprs_rlcmac_pdch *pdch; |
| 938 | struct gprs_rlcmac_trx *trx; |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 939 | uint32_t sb_fn = 0; |
Jacob Erlbeck | 2ca86af | 2016-01-20 18:26:13 +0100 | [diff] [blame] | 940 | uint8_t usf = 7; |
Vadim Yanitskiy | a0a0b7f | 2020-05-21 19:55:46 +0700 | [diff] [blame] | 941 | int plen, rc; |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 942 | |
Pau Espin Pedrol | f5cb4ac | 2021-10-18 13:29:56 +0200 | [diff] [blame] | 943 | /* Allocate a bit-vector for RR Immediate Assignment [Reject] */ |
| 944 | struct bitvec *bv = bitvec_alloc(22, tall_pcu_ctx); /* without plen */ |
| 945 | bitvec_unhex(bv, DUMMY_VEC); /* standard '2B'O padding */ |
| 946 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 947 | bts_do_rate_ctr_inc(bts, CTR_RACH_REQUESTS); |
Holger Hans Peter Freyther | c1ae226 | 2013-10-27 10:50:35 +0100 | [diff] [blame] | 948 | |
Vadim Yanitskiy | a0a0b7f | 2020-05-21 19:55:46 +0700 | [diff] [blame] | 949 | if (rip->is_11bit) |
Pau Espin Pedrol | 7ce56d7 | 2021-11-02 16:47:06 +0100 | [diff] [blame] | 950 | bts_do_rate_ctr_inc(bts, CTR_RACH_REQUESTS_11BIT); |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 951 | |
Philipp Maier | 1275a3f | 2017-02-21 19:35:23 +0100 | [diff] [blame] | 952 | /* Determine full frame number */ |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 953 | uint32_t Fn = bts_rfn_to_fn(bts, rip->rfn); |
Vadim Yanitskiy | a0a0b7f | 2020-05-21 19:55:46 +0700 | [diff] [blame] | 954 | uint8_t ta = qta2ta(rip->qta); |
Philipp | d935d88 | 2016-11-07 13:07:36 +0100 | [diff] [blame] | 955 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 956 | bts_send_gsmtap_rach(bts, PCU_GSMTAP_C_UL_RACH, GSMTAP_CHANNEL_RACH, rip); |
Pau Espin Pedrol | 1ec211f | 2019-09-30 18:33:14 +0200 | [diff] [blame] | 957 | |
Vadim Yanitskiy | a0a0b7f | 2020-05-21 19:55:46 +0700 | [diff] [blame] | 958 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests Uplink resource on CCCH/RACH: " |
| 959 | "ra=0x%02x (%d bit) Fn=%u qta=%d\n", rip->ra, |
| 960 | rip->is_11bit ? 11 : 8, Fn, rip->qta); |
bhargava | 628dcfb | 2016-09-14 20:30:31 +0530 | [diff] [blame] | 961 | |
Vadim Yanitskiy | a0a0b7f | 2020-05-21 19:55:46 +0700 | [diff] [blame] | 962 | /* Parse [EGPRS Packet] Channel Request from RACH.ind */ |
| 963 | rc = parse_rach_ind(rip, &chan_req); |
Pau Espin Pedrol | 48df600 | 2021-11-02 17:20:59 +0100 | [diff] [blame] | 964 | if (rc) { |
| 965 | bts_do_rate_ctr_inc(bts, CTR_RACH_REQUESTS_UNEXPECTED); |
| 966 | /* Send RR Immediate Assignment Reject */ |
Vadim Yanitskiy | a0a0b7f | 2020-05-21 19:55:46 +0700 | [diff] [blame] | 967 | goto send_imm_ass_rej; |
Pau Espin Pedrol | 48df600 | 2021-11-02 17:20:59 +0100 | [diff] [blame] | 968 | } |
bhargava | 628dcfb | 2016-09-14 20:30:31 +0530 | [diff] [blame] | 969 | |
Pau Espin Pedrol | 769e281 | 2021-11-02 16:59:13 +0100 | [diff] [blame] | 970 | if (chan_req.single_block) { |
| 971 | bts_do_rate_ctr_inc(bts, CTR_RACH_REQUESTS_TWO_PHASE); |
Pau Espin Pedrol | 812a7d3 | 2021-11-02 17:14:46 +0100 | [diff] [blame] | 972 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests single block allocation " |
| 973 | "(two phase packet access)\n"); |
Pau Espin Pedrol | 769e281 | 2021-11-02 16:59:13 +0100 | [diff] [blame] | 974 | } else { |
| 975 | bts_do_rate_ctr_inc(bts, CTR_RACH_REQUESTS_ONE_PHASE); |
Pau Espin Pedrol | 7e8d5ab | 2021-11-02 14:08:04 +0100 | [diff] [blame] | 976 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests single TS uplink transmission " |
Pau Espin Pedrol | 769e281 | 2021-11-02 16:59:13 +0100 | [diff] [blame] | 977 | "(one phase packet access)\n"); |
| 978 | if (bts->pcu->vty.force_two_phase) { |
| 979 | LOGP(DRLCMAC, LOGL_DEBUG, "Forcing two phase access\n"); |
| 980 | chan_req.single_block = true; |
| 981 | } |
Vadim Yanitskiy | a0a0b7f | 2020-05-21 19:55:46 +0700 | [diff] [blame] | 982 | } |
| 983 | |
Vadim Yanitskiy | b90d34b | 2020-05-21 20:20:34 +0700 | [diff] [blame] | 984 | /* TODO: handle Radio Priority (see 3GPP TS 44.060, table 11.2.5a.5) */ |
| 985 | if (chan_req.priority > 0) |
| 986 | LOGP(DRLCMAC, LOGL_NOTICE, "EGPRS Packet Channel Request indicates " |
| 987 | "Radio Priority %u, however we ignore it\n", chan_req.priority); |
| 988 | |
Vadim Yanitskiy | a0a0b7f | 2020-05-21 19:55:46 +0700 | [diff] [blame] | 989 | /* Should we allocate a single block or an Uplink TBF? */ |
| 990 | if (chan_req.single_block) { |
Pau Espin Pedrol | 15c58ac | 2021-03-08 14:57:58 +0100 | [diff] [blame] | 991 | sba = bts_alloc_sba(bts, ta); |
| 992 | if (!sba) { |
aravind sirsikar | c0c3afd | 2016-11-09 16:27:00 +0530 | [diff] [blame] | 993 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH resource for " |
Pau Espin Pedrol | 15c58ac | 2021-03-08 14:57:58 +0100 | [diff] [blame] | 994 | "single block allocation\n"); |
| 995 | rc = -EBUSY; |
Vadim Yanitskiy | a0a0b7f | 2020-05-21 19:55:46 +0700 | [diff] [blame] | 996 | /* Send RR Immediate Assignment Reject */ |
| 997 | goto send_imm_ass_rej; |
aravind sirsikar | c0c3afd | 2016-11-09 16:27:00 +0530 | [diff] [blame] | 998 | } |
Vadim Yanitskiy | a0a0b7f | 2020-05-21 19:55:46 +0700 | [diff] [blame] | 999 | |
Pau Espin Pedrol | 9b9f5ef | 2021-10-18 13:20:32 +0200 | [diff] [blame] | 1000 | pdch = sba->pdch; |
Pau Espin Pedrol | 15c58ac | 2021-03-08 14:57:58 +0100 | [diff] [blame] | 1001 | sb_fn = sba->fn; |
Vadim Yanitskiy | a0a0b7f | 2020-05-21 19:55:46 +0700 | [diff] [blame] | 1002 | LOGP(DRLCMAC, LOGL_DEBUG, "Allocated a single block at " |
Pau Espin Pedrol | 9b9f5ef | 2021-10-18 13:20:32 +0200 | [diff] [blame] | 1003 | "SBFn=%u TRX=%u TS=%u\n", sb_fn, pdch->trx->trx_no, pdch->ts_no); |
Pau Espin Pedrol | dff399f | 2021-11-02 17:46:43 +0100 | [diff] [blame] | 1004 | bts_do_rate_ctr_inc(bts, CTR_IMMEDIATE_ASSIGN_UL_TBF_TWO_PHASE); |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 1005 | } else { |
Pau Espin Pedrol | eae9147 | 2023-04-19 19:42:05 +0200 | [diff] [blame] | 1006 | GprsMs *ms = ms_alloc(bts, __func__); |
Pau Espin Pedrol | bfc9756 | 2023-04-17 14:49:29 +0200 | [diff] [blame] | 1007 | ms_set_egprs_ms_class(ms, chan_req.egprs_mslot_class); |
Pau Espin Pedrol | 9438613 | 2022-10-28 19:50:09 +0200 | [diff] [blame] | 1008 | tbf = ms_new_ul_tbf_assigned_agch(ms); |
Pau Espin Pedrol | eae9147 | 2023-04-19 19:42:05 +0200 | [diff] [blame] | 1009 | /* Here either tbf was created and it holds a ref to MS, or tbf |
| 1010 | * creation failed and MS will end up without references and being |
| 1011 | * freed: */ |
| 1012 | ms_unref(ms, __func__); |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 1013 | if (!tbf) { |
Vadim Yanitskiy | a0a0b7f | 2020-05-21 19:55:46 +0700 | [diff] [blame] | 1014 | /* Send RR Immediate Assignment Reject */ |
aravind sirsikar | c0c3afd | 2016-11-09 16:27:00 +0530 | [diff] [blame] | 1015 | rc = -EBUSY; |
Vadim Yanitskiy | a0a0b7f | 2020-05-21 19:55:46 +0700 | [diff] [blame] | 1016 | goto send_imm_ass_rej; |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 1017 | } |
Vadim Yanitskiy | a0a0b7f | 2020-05-21 19:55:46 +0700 | [diff] [blame] | 1018 | tbf->set_ta(ta); |
Pau Espin Pedrol | 140c97c | 2022-12-13 14:14:32 +0100 | [diff] [blame] | 1019 | /* Only single TS can be allocated through AGCH, hence first TS is the only one: */ |
| 1020 | pdch = tbf_get_first_ts(tbf); |
Pau Espin Pedrol | 9b9f5ef | 2021-10-18 13:20:32 +0200 | [diff] [blame] | 1021 | usf = tbf->m_usf[pdch->ts_no]; |
Pau Espin Pedrol | dff399f | 2021-11-02 17:46:43 +0100 | [diff] [blame] | 1022 | bts_do_rate_ctr_inc(bts, CTR_IMMEDIATE_ASSIGN_UL_TBF_ONE_PHASE); |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 1023 | } |
Pau Espin Pedrol | 9b9f5ef | 2021-10-18 13:20:32 +0200 | [diff] [blame] | 1024 | trx = pdch->trx; |
Jacob Erlbeck | 2ca86af | 2016-01-20 18:26:13 +0100 | [diff] [blame] | 1025 | |
Pau Espin Pedrol | f5cb4ac | 2021-10-18 13:29:56 +0200 | [diff] [blame] | 1026 | LOGP(DRLCMAC, LOGL_DEBUG, "Tx Immediate Assignment on AGCH: " |
| 1027 | "TRX=%u (ARFCN %u) TS=%u TA=%u TSC=%u TFI=%d USF=%d\n", |
| 1028 | trx->trx_no, trx->arfcn & ~ARFCN_FLAG_MASK, |
Pau Espin Pedrol | 9c84c88 | 2021-10-18 13:35:05 +0200 | [diff] [blame] | 1029 | pdch->ts_no, ta, pdch->tsc, tbf ? tbf->tfi() : -1, usf); |
Pau Espin Pedrol | f5cb4ac | 2021-10-18 13:29:56 +0200 | [diff] [blame] | 1030 | plen = Encoding::write_immediate_assignment(pdch, tbf, bv, |
| 1031 | false, rip->ra, Fn, ta, usf, false, sb_fn, |
| 1032 | bts_get_ms_pwr_alpha(bts), bts->pcu->vty.gamma, -1, |
| 1033 | rip->burst_type); |
| 1034 | bts_do_rate_ctr_inc(bts, CTR_IMMEDIATE_ASSIGN_UL_TBF); |
| 1035 | if (plen >= 0) { |
| 1036 | pcu_l1if_tx_agch(bts, bv, plen); |
| 1037 | rc = 0; |
Vadim Yanitskiy | a0a0b7f | 2020-05-21 19:55:46 +0700 | [diff] [blame] | 1038 | } else { |
Pau Espin Pedrol | f5cb4ac | 2021-10-18 13:29:56 +0200 | [diff] [blame] | 1039 | rc = plen; |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 1040 | } |
Pau Espin Pedrol | f5cb4ac | 2021-10-18 13:29:56 +0200 | [diff] [blame] | 1041 | bitvec_free(bv); |
| 1042 | return rc; |
Jacob Erlbeck | 2647a33 | 2016-02-01 16:13:38 +0100 | [diff] [blame] | 1043 | |
Pau Espin Pedrol | f5cb4ac | 2021-10-18 13:29:56 +0200 | [diff] [blame] | 1044 | send_imm_ass_rej: |
| 1045 | LOGP(DRLCMAC, LOGL_DEBUG, "Tx Immediate Assignment Reject on AGCH\n"); |
| 1046 | plen = Encoding::write_immediate_assignment_reject( |
| 1047 | bv, rip->ra, Fn, rip->burst_type, |
| 1048 | (uint8_t)osmo_tdef_get(bts->T_defs_bts, 3142, OSMO_TDEF_S, -1)); |
| 1049 | bts_do_rate_ctr_inc(bts, CTR_IMMEDIATE_ASSIGN_REJ); |
Vadim Yanitskiy | a0a0b7f | 2020-05-21 19:55:46 +0700 | [diff] [blame] | 1050 | if (plen >= 0) |
Pau Espin Pedrol | d1049dc | 2021-01-18 17:14:14 +0100 | [diff] [blame] | 1051 | pcu_l1if_tx_agch(bts, bv, plen); |
Vadim Yanitskiy | a0a0b7f | 2020-05-21 19:55:46 +0700 | [diff] [blame] | 1052 | bitvec_free(bv); |
Pau Espin Pedrol | f5cb4ac | 2021-10-18 13:29:56 +0200 | [diff] [blame] | 1053 | /* rc was already properly set before goto */ |
aravind sirsikar | c0c3afd | 2016-11-09 16:27:00 +0530 | [diff] [blame] | 1054 | return rc; |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 1055 | } |
| 1056 | |
Vadim Yanitskiy | ffebd24 | 2019-10-05 23:45:31 +0700 | [diff] [blame] | 1057 | /* PTCCH/U sub-slot / frame-number mapping (see 3GPP TS 45.002, table 6) */ |
| 1058 | static uint32_t ptcch_slot_map[PTCCH_TAI_NUM] = { |
| 1059 | 12, 38, 64, 90, |
| 1060 | 116, 142, 168, 194, |
| 1061 | 220, 246, 272, 298, |
| 1062 | 324, 350, 376, 402, |
| 1063 | }; |
| 1064 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1065 | int bts_rcv_ptcch_rach(struct gprs_rlcmac_bts *bts, const struct rach_ind_params *rip) |
Vadim Yanitskiy | ffebd24 | 2019-10-05 23:45:31 +0700 | [diff] [blame] | 1066 | { |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1067 | uint32_t fn416 = bts_rfn_to_fn(bts, rip->rfn) % 416; |
Vadim Yanitskiy | ffebd24 | 2019-10-05 23:45:31 +0700 | [diff] [blame] | 1068 | struct gprs_rlcmac_pdch *pdch; |
Vadim Yanitskiy | ffebd24 | 2019-10-05 23:45:31 +0700 | [diff] [blame] | 1069 | uint8_t ss; |
| 1070 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1071 | bts_send_gsmtap_rach(bts, PCU_GSMTAP_C_UL_PTCCH, GSMTAP_CHANNEL_PTCCH, rip); |
Vadim Yanitskiy | 07b6487 | 2020-06-11 00:26:15 +0700 | [diff] [blame] | 1072 | |
Vadim Yanitskiy | ffebd24 | 2019-10-05 23:45:31 +0700 | [diff] [blame] | 1073 | /* Prevent buffer overflow */ |
Vadim Yanitskiy | a0a0b7f | 2020-05-21 19:55:46 +0700 | [diff] [blame] | 1074 | if (rip->trx_nr >= ARRAY_SIZE(bts->trx) || rip->ts_nr >= 8) { |
| 1075 | LOGP(DRLCMAC, LOGL_ERROR, "(TRX=%u TS=%u RFN=%u) Rx malformed " |
| 1076 | "RACH.ind (PTCCH/U)\n", rip->trx_nr, rip->ts_nr, rip->rfn); |
Vadim Yanitskiy | ffebd24 | 2019-10-05 23:45:31 +0700 | [diff] [blame] | 1077 | return -EINVAL; |
| 1078 | } |
| 1079 | |
| 1080 | /* Make sure PDCH time-slot is enabled */ |
Vadim Yanitskiy | a0a0b7f | 2020-05-21 19:55:46 +0700 | [diff] [blame] | 1081 | pdch = &bts->trx[rip->trx_nr].pdch[rip->ts_nr]; |
Pau Espin Pedrol | 0f88bcd | 2021-08-31 14:56:17 +0200 | [diff] [blame] | 1082 | if (!pdch->is_enabled()) { |
Vadim Yanitskiy | a0a0b7f | 2020-05-21 19:55:46 +0700 | [diff] [blame] | 1083 | LOGP(DRLCMAC, LOGL_NOTICE, "(TRX=%u TS=%u RFN=%u) Rx RACH.ind (PTCCH/U) " |
| 1084 | "for inactive PDCH\n", rip->trx_nr, rip->ts_nr, rip->rfn); |
Vadim Yanitskiy | ffebd24 | 2019-10-05 23:45:31 +0700 | [diff] [blame] | 1085 | return -EAGAIN; |
| 1086 | } |
| 1087 | |
| 1088 | /* Convert TDMA frame-number to PTCCH/U sub-slot number */ |
| 1089 | for (ss = 0; ss < PTCCH_TAI_NUM; ss++) |
| 1090 | if (ptcch_slot_map[ss] == fn416) |
| 1091 | break; |
| 1092 | if (ss == PTCCH_TAI_NUM) { |
Vadim Yanitskiy | a0a0b7f | 2020-05-21 19:55:46 +0700 | [diff] [blame] | 1093 | LOGP(DRLCMAC, LOGL_ERROR, "(TRX=%u TS=%u RFN=%u) Failed to map " |
| 1094 | "PTCCH/U sub-slot\n", rip->trx_nr, rip->ts_nr, rip->rfn); |
Vadim Yanitskiy | ffebd24 | 2019-10-05 23:45:31 +0700 | [diff] [blame] | 1095 | return -ENODEV; |
| 1096 | } |
| 1097 | |
| 1098 | /* Apply the new Timing Advance value */ |
| 1099 | LOGP(DRLCMAC, LOGL_INFO, "Continuous Timing Advance update " |
Vadim Yanitskiy | a0a0b7f | 2020-05-21 19:55:46 +0700 | [diff] [blame] | 1100 | "for TAI %u, new TA is %u\n", ss, qta2ta(rip->qta)); |
| 1101 | pdch->update_ta(ss, qta2ta(rip->qta)); |
Vadim Yanitskiy | ffebd24 | 2019-10-05 23:45:31 +0700 | [diff] [blame] | 1102 | |
| 1103 | return 0; |
| 1104 | } |
| 1105 | |
Pau Espin Pedrol | 83a0892 | 2022-12-12 19:46:01 +0100 | [diff] [blame] | 1106 | void bts_snd_dl_ass(struct gprs_rlcmac_bts *bts, const struct gprs_rlcmac_dl_tbf *tbf) |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 1107 | { |
| 1108 | int plen; |
Pau Espin Pedrol | 140c97c | 2022-12-13 14:14:32 +0100 | [diff] [blame] | 1109 | const struct gprs_rlcmac_pdch *pdch; |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 1110 | |
Max | c21f007 | 2017-12-15 17:36:45 +0100 | [diff] [blame] | 1111 | LOGPTBF(tbf, LOGL_INFO, "TX: START Immediate Assignment Downlink (PCH)\n"); |
Pau Espin Pedrol | 140c97c | 2022-12-13 14:14:32 +0100 | [diff] [blame] | 1112 | |
| 1113 | /* Only one TS can be assigned through PCH, hence the first one is the only one: */ |
| 1114 | pdch = tbf_get_first_ts_const(tbf); |
| 1115 | |
Alexander Couzens | ccde5c9 | 2017-02-04 03:10:08 +0100 | [diff] [blame] | 1116 | bitvec *immediate_assignment = bitvec_alloc(22, tall_pcu_ctx); /* without plen */ |
Vadim Yanitskiy | eb1e0fa | 2020-07-18 20:33:08 +0700 | [diff] [blame] | 1117 | bitvec_unhex(immediate_assignment, DUMMY_VEC); /* standard '2B'O padding */ |
Vadim Yanitskiy | 153cb7f | 2022-10-26 20:34:44 +0700 | [diff] [blame] | 1118 | /* 3GPP TS 44.018, section 9.1.18.0d states that the network shall code the |
| 1119 | * Request Reference IE, e.g. by using a suitably offset frame number, such |
| 1120 | * that the resource reference cannot be confused with any CHANNEL REQUEST |
| 1121 | * message sent by a mobile station. Use last_rts_fn + 21216 (16 TDMA |
| 1122 | * super-frame periods, or ~21.3 seconds) to achieve a decent distance. */ |
Pau Espin Pedrol | 2c0931c | 2021-03-29 18:40:18 +0200 | [diff] [blame] | 1123 | LOGP(DRLCMAC, LOGL_DEBUG, " - TRX=%d (%d) TS=%d TA=%d\n", |
Pau Espin Pedrol | 140c97c | 2022-12-13 14:14:32 +0100 | [diff] [blame] | 1124 | tbf->trx->trx_no, tbf->trx->arfcn, pdch->ts_no, tbf->ta()); |
| 1125 | plen = Encoding::write_immediate_assignment(pdch, |
Vadim Yanitskiy | 1156776 | 2020-07-18 23:34:17 +0700 | [diff] [blame] | 1126 | tbf, immediate_assignment, true, 125, |
Pau Espin Pedrol | 140c97c | 2022-12-13 14:14:32 +0100 | [diff] [blame] | 1127 | GSM_TDMA_FN_SUM(pdch->last_rts_fn, 21216), |
Pau Espin Pedrol | 2c0931c | 2021-03-29 18:40:18 +0200 | [diff] [blame] | 1128 | tbf->ta(), 7, false, 0, |
Pau Espin Pedrol | fe8de45 | 2021-02-09 18:47:34 +0100 | [diff] [blame] | 1129 | bts_get_ms_pwr_alpha(bts), bts->pcu->vty.gamma, -1, |
Max | fc8afc2 | 2019-02-18 18:52:38 +0100 | [diff] [blame] | 1130 | GSM_L1_BURST_TYPE_ACCESS_0); |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 1131 | if (plen >= 0) { |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1132 | bts_do_rate_ctr_inc(bts, CTR_IMMEDIATE_ASSIGN_DL_TBF); |
Philipp Maier | 2353ed4 | 2023-02-01 13:51:56 +0100 | [diff] [blame] | 1133 | if (the_pcu->pcu_if_version >= 0x0b) |
| 1134 | pcu_l1if_tx_pch_dt(bts, immediate_assignment, plen, tbf->imsi(), tbf->tlli()); |
| 1135 | else |
Philipp Maier | 41e3847 | 2023-03-03 16:04:26 +0100 | [diff] [blame] | 1136 | pcu_l1if_tx_pch(bts, immediate_assignment, plen, tbf->imsi()); |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 1137 | } |
| 1138 | |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 1139 | bitvec_free(immediate_assignment); |
| 1140 | } |
| 1141 | |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 1142 | /* return maximum DL CS supported by BTS and allowed by VTY */ |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1143 | uint8_t bts_max_cs_dl(const struct gprs_rlcmac_bts* bts) |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 1144 | { |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1145 | return bts->max_cs_dl; |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 1146 | } |
| 1147 | |
| 1148 | /* return maximum UL CS supported by BTS and allowed by VTY */ |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1149 | uint8_t bts_max_cs_ul(const struct gprs_rlcmac_bts* bts) |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 1150 | { |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1151 | return bts->max_cs_ul; |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 1152 | } |
| 1153 | |
| 1154 | /* return maximum DL MCS supported by BTS and allowed by VTY */ |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1155 | uint8_t bts_max_mcs_dl(const struct gprs_rlcmac_bts* bts) |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 1156 | { |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1157 | return bts->max_mcs_dl; |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 1158 | } |
| 1159 | |
| 1160 | /* return maximum UL MCS supported by BTS and allowed by VTY */ |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1161 | uint8_t bts_max_mcs_ul(const struct gprs_rlcmac_bts* bts) |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 1162 | { |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1163 | return bts->max_mcs_ul; |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 1164 | } |
| 1165 | |
| 1166 | /* Set maximum DL CS supported by BTS and allowed by VTY */ |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1167 | void bts_set_max_cs_dl(struct gprs_rlcmac_bts* bts, uint8_t cs_dl) |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 1168 | { |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1169 | bts->max_cs_dl = cs_dl; |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 1170 | } |
| 1171 | |
| 1172 | /* Set maximum UL CS supported by BTS and allowed by VTY */ |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1173 | void bts_set_max_cs_ul(struct gprs_rlcmac_bts* bts, uint8_t cs_ul) |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 1174 | { |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1175 | bts->max_cs_ul = cs_ul; |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 1176 | } |
| 1177 | |
| 1178 | /* Set maximum DL MCS supported by BTS and allowed by VTY */ |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1179 | void bts_set_max_mcs_dl(struct gprs_rlcmac_bts* bts, uint8_t mcs_dl) |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 1180 | { |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1181 | bts->max_mcs_dl = mcs_dl; |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 1182 | } |
| 1183 | |
| 1184 | /* Set maximum UL MCS supported by BTS and allowed by VTY */ |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1185 | void bts_set_max_mcs_ul(struct gprs_rlcmac_bts* bts, uint8_t mcs_ul) |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 1186 | { |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1187 | bts->max_mcs_ul = mcs_ul; |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 1188 | } |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 1189 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1190 | bool bts_cs_dl_is_supported(const struct gprs_rlcmac_bts* bts, CodingScheme cs) |
Pau Espin Pedrol | 022f9e5 | 2020-11-16 18:49:39 +0100 | [diff] [blame] | 1191 | { |
| 1192 | OSMO_ASSERT(mcs_is_valid(cs)); |
| 1193 | uint8_t num = mcs_chan_code(cs); |
| 1194 | if (mcs_is_gprs(cs)) { |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1195 | return (bts_max_cs_dl(bts) >= num) && (bts->cs_mask & (1U << num)); |
Pau Espin Pedrol | 022f9e5 | 2020-11-16 18:49:39 +0100 | [diff] [blame] | 1196 | } else { |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1197 | return (bts_max_mcs_dl(bts) >= num) && (bts->mcs_mask & (1U << num)); |
Pau Espin Pedrol | 022f9e5 | 2020-11-16 18:49:39 +0100 | [diff] [blame] | 1198 | } |
| 1199 | } |
| 1200 | |
Pau Espin Pedrol | eb0a052 | 2023-04-17 16:33:35 +0200 | [diff] [blame] | 1201 | struct GprsMs *bts_get_ms(const struct gprs_rlcmac_bts *bts, uint32_t tlli, uint32_t old_tlli, |
| 1202 | const char *imsi) |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1203 | { |
Pau Espin Pedrol | eb0a052 | 2023-04-17 16:33:35 +0200 | [diff] [blame] | 1204 | struct llist_head *tmp; |
| 1205 | |
| 1206 | if (tlli != GSM_RESERVED_TMSI || old_tlli != GSM_RESERVED_TMSI) { |
| 1207 | llist_for_each(tmp, &bts->ms_list) { |
| 1208 | struct GprsMs *ms = llist_entry(tmp, typeof(*ms), list); |
| 1209 | if (ms_check_tlli(ms, tlli)) |
| 1210 | return ms; |
| 1211 | if (ms_check_tlli(ms, old_tlli)) |
| 1212 | return ms; |
| 1213 | } |
| 1214 | } |
| 1215 | |
| 1216 | /* not found by TLLI */ |
| 1217 | |
| 1218 | if (imsi && imsi[0] != '\0') { |
| 1219 | llist_for_each(tmp, &bts->ms_list) { |
| 1220 | struct GprsMs *ms = llist_entry(tmp, typeof(*ms), list); |
| 1221 | if (ms_imsi_is_valid(ms) && strcmp(imsi, ms_imsi(ms)) == 0) |
| 1222 | return ms; |
| 1223 | } |
| 1224 | } |
| 1225 | |
| 1226 | return NULL; |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1227 | } |
| 1228 | |
Pau Espin Pedrol | cde18c5 | 2023-04-17 18:16:48 +0200 | [diff] [blame] | 1229 | struct GprsMs *bts_get_ms_by_tlli(const struct gprs_rlcmac_bts *bts, uint32_t tlli, uint32_t old_tlli) |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1230 | { |
Pau Espin Pedrol | eb0a052 | 2023-04-17 16:33:35 +0200 | [diff] [blame] | 1231 | return bts_get_ms(bts, tlli, old_tlli, NULL); |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1232 | } |
| 1233 | |
Pau Espin Pedrol | cde18c5 | 2023-04-17 18:16:48 +0200 | [diff] [blame] | 1234 | struct GprsMs *bts_get_ms_by_imsi(const struct gprs_rlcmac_bts *bts, const char *imsi) |
| 1235 | { |
Pau Espin Pedrol | eb0a052 | 2023-04-17 16:33:35 +0200 | [diff] [blame] | 1236 | return bts_get_ms(bts, GSM_RESERVED_TMSI, GSM_RESERVED_TMSI, imsi); |
Pau Espin Pedrol | cde18c5 | 2023-04-17 18:16:48 +0200 | [diff] [blame] | 1237 | } |
| 1238 | |
Minh-Quang Nguyen | 1bcfa9a | 2017-11-01 14:41:37 -0400 | [diff] [blame] | 1239 | /* update TA based on TA provided by PH-DATA-IND */ |
| 1240 | void update_tbf_ta(struct gprs_rlcmac_ul_tbf *tbf, int8_t ta_delta) |
| 1241 | { |
| 1242 | int16_t ta_adj; |
| 1243 | uint8_t ta_target; |
| 1244 | |
| 1245 | if (ta_delta) { |
| 1246 | /* adjust TA based on TA provided by PH-DATA-IND */ |
| 1247 | ta_adj = tbf->ta() + ta_delta; |
| 1248 | |
| 1249 | /* limit target TA in range 0..63 bits */ |
| 1250 | ta_target = ta_limit(ta_adj); |
| 1251 | |
Pau Espin Pedrol | 58046e4 | 2021-03-29 19:01:13 +0200 | [diff] [blame] | 1252 | LOGP(DL1IF, LOGL_INFO, "PH-DATA-IND is updating %s: TA %u -> %u on " |
| 1253 | "TRX = %d\n", tbf_name(tbf), tbf->ta(), ta_target, tbf->trx->trx_no); |
Minh-Quang Nguyen | 1bcfa9a | 2017-11-01 14:41:37 -0400 | [diff] [blame] | 1254 | tbf->set_ta(ta_target); |
| 1255 | } |
| 1256 | } |
| 1257 | |
| 1258 | /* set TA based on TA provided by PH-RA-IND */ |
| 1259 | void set_tbf_ta(struct gprs_rlcmac_ul_tbf *tbf, uint8_t ta) |
| 1260 | { |
| 1261 | uint8_t ta_target; |
| 1262 | |
| 1263 | if (tbf->ta() != ta) { |
| 1264 | /* limit target TA in range 0..63 bits */ |
| 1265 | ta_target = ta_limit(ta); |
| 1266 | |
Pau Espin Pedrol | 58046e4 | 2021-03-29 19:01:13 +0200 | [diff] [blame] | 1267 | LOGP(DL1IF, LOGL_INFO, "PH-RA-IND is updating %s: TA %u -> %u on " |
| 1268 | "TRX = %d\n", tbf_name(tbf), tbf->ta(), ta_target, tbf->trx->trx_no); |
Minh-Quang Nguyen | 1bcfa9a | 2017-11-01 14:41:37 -0400 | [diff] [blame] | 1269 | tbf->set_ta(ta_target); |
| 1270 | } |
| 1271 | } |
| 1272 | |
Pau Espin Pedrol | d1049dc | 2021-01-18 17:14:14 +0100 | [diff] [blame] | 1273 | void bts_update_tbf_ta(struct gprs_rlcmac_bts *bts, const char *p, uint32_t fn, |
| 1274 | uint8_t trx_no, uint8_t ts, int8_t ta, bool is_rach) |
Max | d71e8b3 | 2016-09-19 16:17:06 +0200 | [diff] [blame] | 1275 | { |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 1276 | struct gprs_rlcmac_pdch *pdch = &bts->trx[trx_no].pdch[ts]; |
Pau Espin Pedrol | 3bbb3cc | 2021-08-31 14:09:42 +0200 | [diff] [blame] | 1277 | struct pdch_ulc_node *poll; |
Pau Espin Pedrol | b5fece9 | 2021-08-23 16:58:04 +0200 | [diff] [blame] | 1278 | struct gprs_rlcmac_ul_tbf *tbf; |
Pau Espin Pedrol | 3bbb3cc | 2021-08-31 14:09:42 +0200 | [diff] [blame] | 1279 | if (!pdch->is_enabled()) |
| 1280 | goto no_tbf; |
| 1281 | |
| 1282 | poll = pdch_ulc_get_node(pdch->ulc, fn); |
Pau Espin Pedrol | a27fb3f | 2021-09-28 16:33:49 +0200 | [diff] [blame] | 1283 | if (!poll || poll->type != PDCH_ULC_NODE_TBF_POLL || |
Pau Espin Pedrol | bc139a4 | 2021-08-23 17:03:09 +0200 | [diff] [blame] | 1284 | poll->tbf_poll.poll_tbf->direction != GPRS_RLCMAC_UL_TBF) |
Pau Espin Pedrol | 3bbb3cc | 2021-08-31 14:09:42 +0200 | [diff] [blame] | 1285 | goto no_tbf; |
Minh-Quang Nguyen | 1bcfa9a | 2017-11-01 14:41:37 -0400 | [diff] [blame] | 1286 | |
Pau Espin Pedrol | cc30b05 | 2022-10-27 15:25:55 +0200 | [diff] [blame] | 1287 | tbf = tbf_as_ul_tbf(poll->tbf_poll.poll_tbf); |
Pau Espin Pedrol | 3bbb3cc | 2021-08-31 14:09:42 +0200 | [diff] [blame] | 1288 | /* we need to distinguish TA information provided by L1 |
| 1289 | * from PH-DATA-IND and PHY-RA-IND so that we can properly |
| 1290 | * update TA for given TBF |
| 1291 | */ |
| 1292 | if (is_rach) |
| 1293 | set_tbf_ta(tbf, (uint8_t)ta); |
| 1294 | else |
| 1295 | update_tbf_ta(tbf, ta); |
| 1296 | return; |
| 1297 | |
| 1298 | no_tbf: |
| 1299 | LOGP(DL1IF, LOGL_DEBUG, "[%s] update TA = %u ignored due to " |
| 1300 | "unknown UL TBF on TRX = %d, TS = %d, FN = %d\n", |
| 1301 | p, ta, trx_no, ts, fn); |
Max | d71e8b3 | 2016-09-19 16:17:06 +0200 | [diff] [blame] | 1302 | } |
| 1303 | |
Pau Espin Pedrol | 702ebee | 2021-03-08 14:15:54 +0100 | [diff] [blame] | 1304 | void bts_trx_init(struct gprs_rlcmac_trx *trx, struct gprs_rlcmac_bts *bts, uint8_t trx_no) |
| 1305 | { |
| 1306 | trx->trx_no = trx_no; |
| 1307 | trx->bts = bts; |
| 1308 | |
Pau Espin Pedrol | 1a1557a | 2021-05-13 18:39:36 +0200 | [diff] [blame] | 1309 | INIT_LLIST_HEAD(&trx->ul_tbfs); |
| 1310 | INIT_LLIST_HEAD(&trx->dl_tbfs); |
| 1311 | |
Pau Espin Pedrol | 702ebee | 2021-03-08 14:15:54 +0100 | [diff] [blame] | 1312 | for (size_t ts_no = 0; ts_no < ARRAY_SIZE(trx->pdch); ts_no++) |
| 1313 | pdch_init(&trx->pdch[ts_no], trx, ts_no); |
| 1314 | } |
| 1315 | |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 1316 | void bts_trx_reserve_slots(struct gprs_rlcmac_trx *trx, enum gprs_rlcmac_tbf_direction dir, |
Jacob Erlbeck | 23f93a1 | 2015-06-30 08:52:54 +0200 | [diff] [blame] | 1317 | uint8_t slots) |
| 1318 | { |
| 1319 | unsigned i; |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 1320 | for (i = 0; i < ARRAY_SIZE(trx->pdch); i += 1) |
Jacob Erlbeck | 23f93a1 | 2015-06-30 08:52:54 +0200 | [diff] [blame] | 1321 | if (slots & (1 << i)) |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 1322 | trx->pdch[i].reserve(dir); |
Jacob Erlbeck | 23f93a1 | 2015-06-30 08:52:54 +0200 | [diff] [blame] | 1323 | } |
| 1324 | |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 1325 | void bts_trx_unreserve_slots(struct gprs_rlcmac_trx *trx, enum gprs_rlcmac_tbf_direction dir, |
Jacob Erlbeck | 23f93a1 | 2015-06-30 08:52:54 +0200 | [diff] [blame] | 1326 | uint8_t slots) |
| 1327 | { |
| 1328 | unsigned i; |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 1329 | for (i = 0; i < ARRAY_SIZE(trx->pdch); i += 1) |
Jacob Erlbeck | 23f93a1 | 2015-06-30 08:52:54 +0200 | [diff] [blame] | 1330 | if (slots & (1 << i)) |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 1331 | trx->pdch[i].unreserve(dir); |
Jacob Erlbeck | 23f93a1 | 2015-06-30 08:52:54 +0200 | [diff] [blame] | 1332 | } |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 1333 | |
Pau Espin Pedrol | 793583e | 2021-01-14 16:20:57 +0100 | [diff] [blame] | 1334 | void bts_recalc_initial_cs(struct gprs_rlcmac_bts *bts) |
| 1335 | { |
| 1336 | uint8_t max_cs_dl, max_cs_ul; |
| 1337 | |
| 1338 | if (the_pcu->vty.force_initial_cs) { |
| 1339 | bts->initial_cs_dl = the_pcu->vty.initial_cs_dl; |
| 1340 | bts->initial_cs_ul = the_pcu->vty.initial_cs_ul; |
| 1341 | return; |
| 1342 | } |
| 1343 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1344 | max_cs_dl = bts_max_cs_dl(bts); |
Pau Espin Pedrol | 793583e | 2021-01-14 16:20:57 +0100 | [diff] [blame] | 1345 | if (bts->pcuif_info_ind.initial_cs > max_cs_dl) { |
| 1346 | LOGP(DL1IF, LOGL_DEBUG, " downgrading initial_cs_dl to %d\n", max_cs_dl); |
| 1347 | bts->initial_cs_dl = max_cs_dl; |
| 1348 | } else { |
| 1349 | bts->initial_cs_dl = bts->pcuif_info_ind.initial_cs; |
| 1350 | } |
| 1351 | if (bts->initial_cs_dl == 0) |
| 1352 | bts->initial_cs_dl = 1; /* CS1 Must always be supported */ |
| 1353 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1354 | max_cs_ul = bts_max_cs_ul(bts); |
Pau Espin Pedrol | 793583e | 2021-01-14 16:20:57 +0100 | [diff] [blame] | 1355 | if (bts->pcuif_info_ind.initial_cs > max_cs_ul) { |
| 1356 | LOGP(DL1IF, LOGL_DEBUG, " downgrading initial_cs_ul to %d\n", max_cs_ul); |
| 1357 | bts->initial_cs_ul = max_cs_ul; |
| 1358 | } else { |
| 1359 | bts->initial_cs_ul = bts->pcuif_info_ind.initial_cs; |
| 1360 | } |
| 1361 | if (bts->initial_cs_ul == 0) |
| 1362 | bts->initial_cs_ul = 1; /* CS1 Must always be supported */ |
| 1363 | } |
| 1364 | void bts_recalc_initial_mcs(struct gprs_rlcmac_bts *bts) |
| 1365 | { |
| 1366 | uint8_t max_mcs_dl, max_mcs_ul; |
| 1367 | |
| 1368 | if (the_pcu->vty.force_initial_mcs) { |
| 1369 | bts->initial_mcs_dl = the_pcu->vty.initial_mcs_dl; |
| 1370 | bts->initial_mcs_ul = the_pcu->vty.initial_mcs_ul; |
| 1371 | return; |
| 1372 | } |
| 1373 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1374 | max_mcs_dl = bts_max_mcs_dl(bts); |
Pau Espin Pedrol | 793583e | 2021-01-14 16:20:57 +0100 | [diff] [blame] | 1375 | if (bts->pcuif_info_ind.initial_mcs > max_mcs_dl) { |
| 1376 | LOGP(DL1IF, LOGL_DEBUG, " downgrading initial_mcs_dl to %d\n", max_mcs_dl); |
| 1377 | bts->initial_mcs_dl = max_mcs_dl; |
| 1378 | } else { |
| 1379 | bts->initial_mcs_dl = bts->pcuif_info_ind.initial_mcs; |
| 1380 | } |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1381 | max_mcs_ul = bts_max_mcs_ul(bts); |
Pau Espin Pedrol | 793583e | 2021-01-14 16:20:57 +0100 | [diff] [blame] | 1382 | if (bts->pcuif_info_ind.initial_mcs > max_mcs_ul) { |
| 1383 | LOGP(DL1IF, LOGL_DEBUG, " downgrading initial_mcs_ul to %d\n", max_mcs_ul); |
| 1384 | bts->initial_mcs_ul = max_mcs_ul; |
| 1385 | } else { |
| 1386 | bts->initial_mcs_ul = bts->pcuif_info_ind.initial_mcs; |
| 1387 | } |
| 1388 | } |
| 1389 | |
Pau Espin Pedrol | ac3fd12 | 2021-01-13 18:54:38 +0100 | [diff] [blame] | 1390 | void bts_recalc_max_cs(struct gprs_rlcmac_bts *bts) |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 1391 | { |
| 1392 | int i; |
Pau Espin Pedrol | ac3fd12 | 2021-01-13 18:54:38 +0100 | [diff] [blame] | 1393 | uint8_t cs_dl, cs_ul; |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1394 | struct gprs_pcu *pcu = bts->pcu; |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 1395 | |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 1396 | cs_dl = 0; |
Pau Espin Pedrol | ac3fd12 | 2021-01-13 18:54:38 +0100 | [diff] [blame] | 1397 | for (i = pcu->vty.max_cs_dl - 1; i >= 0; i--) { |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 1398 | if (bts->cs_mask & (1 << i)) { |
| 1399 | cs_dl = i + 1; |
| 1400 | break; |
| 1401 | } |
| 1402 | } |
| 1403 | |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 1404 | cs_ul = 0; |
Pau Espin Pedrol | ac3fd12 | 2021-01-13 18:54:38 +0100 | [diff] [blame] | 1405 | for (i = pcu->vty.max_cs_ul - 1; i >= 0; i--) { |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 1406 | if (bts->cs_mask & (1 << i)) { |
| 1407 | cs_ul = i + 1; |
| 1408 | break; |
| 1409 | } |
| 1410 | } |
| 1411 | |
| 1412 | LOGP(DRLCMAC, LOGL_DEBUG, "New max CS: DL=%u UL=%u\n", cs_dl, cs_ul); |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1413 | bts_set_max_cs_dl(bts, cs_dl); |
| 1414 | bts_set_max_cs_ul(bts, cs_ul); |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 1415 | } |
| 1416 | |
Pau Espin Pedrol | ac3fd12 | 2021-01-13 18:54:38 +0100 | [diff] [blame] | 1417 | void bts_recalc_max_mcs(struct gprs_rlcmac_bts *bts) |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 1418 | { |
| 1419 | int i; |
Pau Espin Pedrol | ac3fd12 | 2021-01-13 18:54:38 +0100 | [diff] [blame] | 1420 | uint8_t mcs_dl, mcs_ul; |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1421 | struct gprs_pcu *pcu = bts->pcu; |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 1422 | |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 1423 | mcs_dl = 0; |
Pau Espin Pedrol | ac3fd12 | 2021-01-13 18:54:38 +0100 | [diff] [blame] | 1424 | for (i = pcu->vty.max_mcs_dl - 1; i >= 0; i--) { |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 1425 | if (bts->mcs_mask & (1 << i)) { |
| 1426 | mcs_dl = i + 1; |
| 1427 | break; |
| 1428 | } |
| 1429 | } |
| 1430 | |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 1431 | mcs_ul = 0; |
Pau Espin Pedrol | ac3fd12 | 2021-01-13 18:54:38 +0100 | [diff] [blame] | 1432 | for (i = pcu->vty.max_mcs_ul - 1; i >= 0; i--) { |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 1433 | if (bts->mcs_mask & (1 << i)) { |
| 1434 | mcs_ul = i + 1; |
| 1435 | break; |
| 1436 | } |
| 1437 | } |
| 1438 | |
| 1439 | LOGP(DRLCMAC, LOGL_DEBUG, "New max MCS: DL=%u UL=%u\n", mcs_dl, mcs_ul); |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1440 | bts_set_max_mcs_dl(bts, mcs_dl); |
| 1441 | bts_set_max_mcs_ul(bts, mcs_ul); |
Pau Espin Pedrol | 343ec9b | 2020-10-30 18:35:54 +0100 | [diff] [blame] | 1442 | } |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 1443 | |
Pau Espin Pedrol | fe8de45 | 2021-02-09 18:47:34 +0100 | [diff] [blame] | 1444 | uint8_t bts_get_ms_pwr_alpha(const struct gprs_rlcmac_bts *bts) |
| 1445 | { |
| 1446 | if (bts->pcu->vty.force_alpha != (uint8_t)-1) |
| 1447 | return bts->pcu->vty.force_alpha; |
| 1448 | if (bts->si13_is_set) |
Pau Espin Pedrol | d65bd9d | 2021-06-01 16:43:41 +0200 | [diff] [blame] | 1449 | return bts->si13_ro_decoded.pwr_ctrl_pars.alpha; |
Pau Espin Pedrol | fe8de45 | 2021-02-09 18:47:34 +0100 | [diff] [blame] | 1450 | /* default if no SI13 is received yet: closed loop control, TS 44.060 |
| 1451 | * B.2 Closed loop control */ |
| 1452 | return 0; |
| 1453 | } |
Pau Espin Pedrol | 0dcbc07 | 2021-11-10 19:09:10 +0100 | [diff] [blame] | 1454 | |
| 1455 | /* Used by counter availablePDCHAllocatedTime, TS 52.402 B.2.1.45 "All available PDCH allocated time" */ |
| 1456 | bool bts_all_pdch_allocated(const struct gprs_rlcmac_bts *bts) |
| 1457 | { |
| 1458 | unsigned trx_no, ts_no; |
| 1459 | for (trx_no = 0; trx_no < ARRAY_SIZE(bts->trx); trx_no++) { |
| 1460 | const struct gprs_rlcmac_trx *trx = &bts->trx[trx_no]; |
| 1461 | for (ts_no = 0; ts_no < ARRAY_SIZE(trx->pdch); ts_no++) { |
| 1462 | const struct gprs_rlcmac_pdch *pdch = &trx->pdch[ts_no]; |
| 1463 | if (!pdch_is_enabled(pdch)) |
| 1464 | continue; |
| 1465 | if(!pdch_is_full(pdch)) |
| 1466 | return false; |
| 1467 | } |
| 1468 | } |
| 1469 | return true; |
| 1470 | } |