Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 by Holger Hans Peter Freyther |
| 3 | * Copyright (C) 2018 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de> |
| 4 | * |
| 5 | * All Rights Reserved |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU Affero General Public License as published by |
| 9 | * the Free Software Foundation; either version 3 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Affero General Public License |
| 18 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 19 | * |
| 20 | */ |
| 21 | |
| 22 | #include <bts.h> |
| 23 | #include <pdch.h> |
| 24 | #include <decoding.h> |
| 25 | #include <encoding.h> |
| 26 | #include <gprs_rlcmac.h> |
| 27 | #include <gprs_debug.h> |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 28 | #include <coding_scheme.h> |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 29 | #include <gprs_ms.h> |
| 30 | #include <gprs_ms_storage.h> |
| 31 | #include <pcu_l1_if.h> |
| 32 | #include <rlc.h> |
| 33 | #include <sba.h> |
| 34 | #include <tbf.h> |
Pau Espin Pedrol | 9d1cdb1 | 2019-09-25 17:47:02 +0200 | [diff] [blame] | 35 | #include <tbf_ul.h> |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 36 | #include <cxx_linuxlist.h> |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 37 | |
| 38 | extern "C" { |
Pau Espin Pedrol | 980ef1e | 2020-03-26 15:06:11 +0100 | [diff] [blame] | 39 | #include <osmocom/core/talloc.h> |
| 40 | #include <osmocom/core/msgb.h> |
Vadim Yanitskiy | d71c566 | 2020-03-26 15:45:21 +0700 | [diff] [blame] | 41 | #include <osmocom/gsm/gsm48.h> |
Pau Espin Pedrol | 980ef1e | 2020-03-26 15:06:11 +0100 | [diff] [blame] | 42 | #include <osmocom/gsm/protocol/gsm_04_08.h> |
| 43 | #include <osmocom/core/bitvec.h> |
| 44 | #include <osmocom/core/gsmtap.h> |
| 45 | #include <osmocom/core/logging.h> |
| 46 | #include <osmocom/core/utils.h> |
Pau Espin Pedrol | b2653fe | 2020-03-26 15:14:01 +0100 | [diff] [blame] | 47 | |
Pau Espin Pedrol | 980ef1e | 2020-03-26 15:06:11 +0100 | [diff] [blame] | 48 | #include "coding_scheme.h" |
Pau Espin Pedrol | b2653fe | 2020-03-26 15:14:01 +0100 | [diff] [blame] | 49 | #include "gsm_rlcmac.h" |
Pau Espin Pedrol | 952cb3d | 2021-02-01 14:52:48 +0100 | [diff] [blame] | 50 | #include "nacc_fsm.h" |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 51 | } |
| 52 | |
| 53 | #include <errno.h> |
Vadim Yanitskiy | bd0dac3 | 2019-10-05 21:57:14 +0700 | [diff] [blame] | 54 | #include <stdlib.h> |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 55 | #include <arpa/inet.h> |
| 56 | |
| 57 | extern void *tall_pcu_ctx; |
| 58 | |
| 59 | static void get_rx_qual_meas(struct pcu_l1_meas *meas, uint8_t rx_qual_enc) |
| 60 | { |
| 61 | static const int16_t rx_qual_map[] = { |
| 62 | 0, /* 0,14 % */ |
| 63 | 0, /* 0,28 % */ |
| 64 | 1, /* 0,57 % */ |
| 65 | 1, /* 1,13 % */ |
| 66 | 2, /* 2,26 % */ |
| 67 | 5, /* 4,53 % */ |
| 68 | 9, /* 9,05 % */ |
| 69 | 18, /* 18,10 % */ |
| 70 | }; |
| 71 | |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 72 | pcu_l1_meas_set_ms_rx_qual(meas, rx_qual_map[ |
| 73 | OSMO_MIN(rx_qual_enc, ARRAY_SIZE(rx_qual_map)-1) |
| 74 | ]); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 75 | } |
| 76 | |
| 77 | static void get_meas(struct pcu_l1_meas *meas, |
| 78 | const Packet_Resource_Request_t *qr) |
| 79 | { |
| 80 | unsigned i; |
| 81 | |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 82 | pcu_l1_meas_set_ms_c_value(meas, qr->C_VALUE); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 83 | if (qr->Exist_SIGN_VAR) |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 84 | pcu_l1_meas_set_ms_sign_var(meas, (qr->SIGN_VAR + 2) / 4); /* SIGN_VAR * 0.25 dB */ |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 85 | |
Pau Espin Pedrol | 0daf913 | 2020-02-23 16:11:28 +0700 | [diff] [blame] | 86 | for (i = 0; i < OSMO_MIN(ARRAY_SIZE(qr->I_LEVEL_TN), ARRAY_SIZE(meas->ts)); i++) |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 87 | { |
Pau Espin Pedrol | 0daf913 | 2020-02-23 16:11:28 +0700 | [diff] [blame] | 88 | if (qr->I_LEVEL_TN[i].Exist) { |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 89 | LOGP(DRLCMAC, LOGL_INFO, |
| 90 | "Packet resource request: i_level[%d] = %d\n", |
Pau Espin Pedrol | 0daf913 | 2020-02-23 16:11:28 +0700 | [diff] [blame] | 91 | i, qr->I_LEVEL_TN[i].I_LEVEL); |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 92 | pcu_l1_meas_set_ms_i_level(meas, i, -2 * qr->I_LEVEL_TN[i].I_LEVEL); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 93 | } |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | static void get_meas(struct pcu_l1_meas *meas, |
| 98 | const Channel_Quality_Report_t *qr) |
| 99 | { |
| 100 | unsigned i; |
| 101 | |
| 102 | get_rx_qual_meas(meas, qr->RXQUAL); |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 103 | pcu_l1_meas_set_ms_c_value(meas, qr->C_VALUE); |
| 104 | pcu_l1_meas_set_ms_sign_var(meas, (qr->SIGN_VAR + 2) / 4); /* SIGN_VAR * 0.25 dB */ |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 105 | |
| 106 | for (i = 0; i < OSMO_MIN(ARRAY_SIZE(qr->Slot), ARRAY_SIZE(meas->ts)); i++) |
| 107 | { |
| 108 | if (qr->Slot[i].Exist) { |
| 109 | LOGP(DRLCMAC, LOGL_DEBUG, |
| 110 | "Channel quality report: i_level[%d] = %d\n", |
| 111 | i, qr->Slot[i].I_LEVEL_TN); |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 112 | pcu_l1_meas_set_ms_i_level(meas, i, -2 * qr->Slot[i].I_LEVEL_TN); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 113 | } |
| 114 | } |
| 115 | } |
| 116 | |
Pau Espin Pedrol | 0ece97d | 2021-01-18 12:53:54 +0100 | [diff] [blame] | 117 | static inline void sched_ul_ass_or_rej(struct gprs_rlcmac_bts *bts, struct gprs_rlcmac_dl_tbf *tbf) |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 118 | { |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 119 | bts_do_rate_ctr_inc(bts, CTR_CHANNEL_REQUEST_DESCRIPTION); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 120 | |
| 121 | /* This call will register the new TBF with the MS on success */ |
Pau Espin Pedrol | 0ece97d | 2021-01-18 12:53:54 +0100 | [diff] [blame] | 122 | gprs_rlcmac_ul_tbf *ul_tbf = tbf_alloc_ul(bts, tbf->ms(), tbf->trx->trx_no, tbf->tlli()); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 123 | |
| 124 | /* schedule uplink assignment or reject */ |
| 125 | if (ul_tbf) { |
| 126 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF in ack message, so we provide one:\n"); |
| 127 | TBF_SET_ASS_STATE_UL(tbf, GPRS_RLCMAC_UL_ASS_SEND_ASS); |
| 128 | } else { |
| 129 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF in ack message, so we packet access reject:\n"); |
| 130 | TBF_SET_ASS_STATE_UL(tbf, GPRS_RLCMAC_UL_ASS_SEND_ASS_REJ); |
| 131 | } |
| 132 | } |
| 133 | |
| 134 | void gprs_rlcmac_pdch::enable() |
| 135 | { |
| 136 | /* TODO: Check if there are still allocated resources.. */ |
| 137 | INIT_LLIST_HEAD(&paging_list); |
| 138 | m_is_enabled = 1; |
| 139 | } |
| 140 | |
| 141 | void gprs_rlcmac_pdch::disable() |
| 142 | { |
| 143 | /* TODO.. kick free_resources once we know the TRX/TS we are on */ |
| 144 | m_is_enabled = 0; |
| 145 | } |
| 146 | |
| 147 | void gprs_rlcmac_pdch::free_resources() |
| 148 | { |
| 149 | struct gprs_rlcmac_paging *pag; |
| 150 | |
| 151 | /* we are not enabled. there should be no resources */ |
| 152 | if (!is_enabled()) |
| 153 | return; |
| 154 | |
| 155 | /* kick all TBF on slot */ |
Pau Espin Pedrol | 906aafc | 2021-01-18 17:53:29 +0100 | [diff] [blame] | 156 | pdch_free_all_tbf(this); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 157 | |
| 158 | /* flush all pending paging messages */ |
| 159 | while ((pag = dequeue_paging())) |
| 160 | talloc_free(pag); |
| 161 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 162 | bts_sba(trx->bts)->free_resources(this); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 163 | } |
| 164 | |
| 165 | struct gprs_rlcmac_paging *gprs_rlcmac_pdch::dequeue_paging() |
| 166 | { |
| 167 | struct gprs_rlcmac_paging *pag; |
| 168 | |
| 169 | if (llist_empty(&paging_list)) |
| 170 | return NULL; |
| 171 | pag = llist_entry(paging_list.next, struct gprs_rlcmac_paging, list); |
| 172 | llist_del(&pag->list); |
| 173 | |
| 174 | return pag; |
| 175 | } |
| 176 | |
| 177 | struct msgb *gprs_rlcmac_pdch::packet_paging_request() |
| 178 | { |
| 179 | struct gprs_rlcmac_paging *pag; |
Pau Espin Pedrol | 5e300ce | 2020-02-03 17:18:03 +0100 | [diff] [blame] | 180 | RlcMacDownlink_t *mac_control_block; |
| 181 | bitvec *pag_vec; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 182 | struct msgb *msg; |
| 183 | unsigned wp = 0, len; |
Pau Espin Pedrol | 5e300ce | 2020-02-03 17:18:03 +0100 | [diff] [blame] | 184 | int rc; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 185 | |
| 186 | /* no paging, no message */ |
| 187 | pag = dequeue_paging(); |
| 188 | if (!pag) |
| 189 | return NULL; |
| 190 | |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 191 | LOGPDCH(this, DRLCMAC, LOGL_DEBUG, "Scheduling paging\n"); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 192 | |
| 193 | /* alloc message */ |
| 194 | msg = msgb_alloc(23, "pag ctrl block"); |
| 195 | if (!msg) { |
| 196 | talloc_free(pag); |
| 197 | return NULL; |
| 198 | } |
Pau Espin Pedrol | 5e300ce | 2020-02-03 17:18:03 +0100 | [diff] [blame] | 199 | pag_vec = bitvec_alloc(23, tall_pcu_ctx); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 200 | if (!pag_vec) { |
| 201 | msgb_free(msg); |
| 202 | talloc_free(pag); |
| 203 | return NULL; |
| 204 | } |
| 205 | wp = Encoding::write_packet_paging_request(pag_vec); |
| 206 | |
| 207 | /* loop until message is full */ |
| 208 | while (pag) { |
Neels Hofmeyr | 0052051 | 2020-08-21 15:44:58 +0200 | [diff] [blame] | 209 | if (log_check_level(DRLCMAC, LOGL_DEBUG)) { |
| 210 | struct osmo_mobile_identity omi = {}; |
| 211 | char str[64]; |
| 212 | osmo_mobile_identity_decode(&omi, pag->identity_lv + 1, pag->identity_lv[0], true); |
| 213 | osmo_mobile_identity_to_str_buf(str, sizeof(str), &omi); |
| 214 | LOGP(DRLCMAC, LOGL_DEBUG, "Paging MI - %s\n", str); |
| 215 | } |
Vadim Yanitskiy | d71c566 | 2020-03-26 15:45:21 +0700 | [diff] [blame] | 216 | |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 217 | /* try to add paging */ |
Vadim Yanitskiy | ce16014 | 2020-03-26 16:18:17 +0700 | [diff] [blame] | 218 | if ((pag->identity_lv[1] & GSM_MI_TYPE_MASK) == GSM_MI_TYPE_TMSI) { |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 219 | /* TMSI */ |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 220 | len = 1 + 1 + 1 + 32 + 2 + 1; |
| 221 | if (pag->identity_lv[0] != 5) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 222 | LOGPDCH(this, DRLCMAC, LOGL_ERROR, |
| 223 | "TMSI paging with MI != 5 octets!\n"); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 224 | goto continue_next; |
| 225 | } |
| 226 | } else { |
| 227 | /* MI */ |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 228 | len = 1 + 1 + 1 + 4 + (pag->identity_lv[0]<<3) + 2 + 1; |
| 229 | if (pag->identity_lv[0] > 8) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 230 | LOGPDCH(this, DRLCMAC, LOGL_ERROR, |
| 231 | "Paging with MI > 8 octets!\n"); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 232 | goto continue_next; |
| 233 | } |
| 234 | } |
| 235 | if (wp + len > 184) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 236 | LOGPDCH(this, DRLCMAC, LOGL_DEBUG, |
| 237 | "- Does not fit, so schedule next time\n"); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 238 | /* put back paging record, because does not fit */ |
Pau Espin Pedrol | 7d3ee9e | 2020-11-23 16:04:02 +0100 | [diff] [blame] | 239 | llist_add(&pag->list, &paging_list); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 240 | break; |
| 241 | } |
| 242 | Encoding::write_repeated_page_info(pag_vec, wp, pag->identity_lv[0], |
| 243 | pag->identity_lv + 1, pag->chan_needed); |
| 244 | |
| 245 | continue_next: |
| 246 | talloc_free(pag); |
| 247 | pag = dequeue_paging(); |
| 248 | } |
| 249 | |
| 250 | bitvec_pack(pag_vec, msgb_put(msg, 23)); |
Pau Espin Pedrol | 5e300ce | 2020-02-03 17:18:03 +0100 | [diff] [blame] | 251 | mac_control_block = (RlcMacDownlink_t *)talloc_zero(tall_pcu_ctx, RlcMacDownlink_t); |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 252 | LOGPDCH(this, DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ TX : Packet Paging Request +++++++++++++++++++++++++\n"); |
Pau Espin Pedrol | 5e300ce | 2020-02-03 17:18:03 +0100 | [diff] [blame] | 253 | rc = decode_gsm_rlcmac_downlink(pag_vec, mac_control_block); |
| 254 | if (rc < 0) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 255 | LOGPDCH(this, DRLCMAC, LOGL_ERROR, "Decoding of Downlink Packet Paging Request failed (%d): %s\n", |
Pau Espin Pedrol | 9c4f9ff | 2020-11-23 16:36:42 +0100 | [diff] [blame] | 256 | rc, osmo_hexdump(msgb_data(msg), msgb_length(msg))); |
Pau Espin Pedrol | 5e300ce | 2020-02-03 17:18:03 +0100 | [diff] [blame] | 257 | goto free_ret; |
| 258 | } |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 259 | LOGPDCH(this, DRLCMAC, LOGL_DEBUG, "------------------------- TX : Packet Paging Request -------------------------\n"); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 260 | bitvec_free(pag_vec); |
| 261 | talloc_free(mac_control_block); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 262 | return msg; |
Pau Espin Pedrol | 5e300ce | 2020-02-03 17:18:03 +0100 | [diff] [blame] | 263 | |
| 264 | free_ret: |
| 265 | bitvec_free(pag_vec); |
| 266 | talloc_free(mac_control_block); |
| 267 | msgb_free(msg); |
| 268 | return NULL; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 269 | } |
| 270 | |
Neels Hofmeyr | 59fc0bd | 2020-08-21 16:21:23 +0200 | [diff] [blame] | 271 | bool gprs_rlcmac_pdch::add_paging(uint8_t chan_needed, const struct osmo_mobile_identity *mi) |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 272 | { |
Neels Hofmeyr | 59fc0bd | 2020-08-21 16:21:23 +0200 | [diff] [blame] | 273 | int rc; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 274 | struct gprs_rlcmac_paging *pag = talloc_zero(tall_pcu_ctx, struct gprs_rlcmac_paging); |
| 275 | if (!pag) |
| 276 | return false; |
| 277 | |
| 278 | pag->chan_needed = chan_needed; |
Neels Hofmeyr | 59fc0bd | 2020-08-21 16:21:23 +0200 | [diff] [blame] | 279 | rc = osmo_mobile_identity_encode_buf(pag->identity_lv + 1, sizeof(pag->identity_lv) - 1, mi, true); |
| 280 | if (rc <= 0) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 281 | LOGPDCH(this, DRLCMAC, LOGL_ERROR, "Cannot encode Mobile Identity (rc=%d)\n", rc); |
Neels Hofmeyr | 59fc0bd | 2020-08-21 16:21:23 +0200 | [diff] [blame] | 282 | talloc_free(pag); |
| 283 | return false; |
| 284 | } |
| 285 | pag->identity_lv[0] = rc; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 286 | |
| 287 | llist_add(&pag->list, &paging_list); |
| 288 | |
| 289 | return true; |
| 290 | } |
| 291 | |
| 292 | void gprs_rlcmac_pdch::rcv_control_ack(Packet_Control_Acknowledgement_t *packet, uint32_t fn) |
| 293 | { |
| 294 | struct gprs_rlcmac_tbf *tbf, *new_tbf; |
| 295 | uint32_t tlli = packet->TLLI; |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 296 | GprsMs *ms = bts_ms_by_tlli(bts(), tlli, GSM_RESERVED_TMSI); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 297 | gprs_rlcmac_ul_tbf *ul_tbf; |
| 298 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 299 | tbf = bts_ul_tbf_by_poll_fn(bts(), fn, trx_no(), ts_no); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 300 | if (!tbf) |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 301 | tbf = bts_dl_tbf_by_poll_fn(bts(), fn, trx_no(), ts_no); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 302 | |
| 303 | if (!tbf) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 304 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, "PACKET CONTROL ACK with " |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 305 | "unknown FN=%u TLLI=0x%08x (TRX %d TS %d)\n", |
| 306 | fn, tlli, trx_no(), ts_no); |
| 307 | if (ms) |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 308 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, "PACKET CONTROL ACK with " |
| 309 | "unknown TBF corresponds to MS with IMSI %s, TA %d, " |
| 310 | "uTBF (TFI=%d, state=%s), dTBF (TFI=%d, state=%s)\n", |
| 311 | ms_imsi(ms), ms_ta(ms), |
| 312 | ms_ul_tbf(ms) ? ms_ul_tbf(ms)->tfi() : 0, |
| 313 | ms_ul_tbf(ms) ? ms_ul_tbf(ms)->state_name() : "None", |
| 314 | ms_dl_tbf(ms) ? ms_dl_tbf(ms)->tfi() : 0, |
| 315 | ms_dl_tbf(ms) ? ms_dl_tbf(ms)->state_name() : "None"); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 316 | return; |
| 317 | } |
| 318 | |
| 319 | /* Reset N3101 counter: */ |
Max | 847ed9f | 2018-02-20 18:16:11 +0100 | [diff] [blame] | 320 | tbf->n_reset(N3101); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 321 | |
| 322 | tbf->update_ms(tlli, GPRS_RLCMAC_UL_TBF); |
| 323 | |
| 324 | LOGPTBF(tbf, LOGL_DEBUG, "RX: [PCU <- BTS] Packet Control Ack\n"); |
| 325 | TBF_POLL_SCHED_UNSET(tbf); |
| 326 | |
| 327 | /* check if this control ack belongs to packet uplink ack */ |
| 328 | ul_tbf = as_ul_tbf(tbf); |
| 329 | if (ul_tbf && ul_tbf->handle_ctrl_ack()) { |
| 330 | LOGPTBF(tbf, LOGL_DEBUG, "[UPLINK] END\n"); |
| 331 | if (ul_tbf->ctrl_ack_to_toggle()) |
| 332 | LOGPTBF(tbf, LOGL_NOTICE, "Recovered uplink ack for UL\n"); |
| 333 | |
| 334 | tbf_free(tbf); |
| 335 | return; |
| 336 | } |
| 337 | if (tbf->dl_ass_state_is(GPRS_RLCMAC_DL_ASS_WAIT_ACK)) { |
| 338 | LOGPTBF(tbf, LOGL_DEBUG, "[UPLINK] DOWNLINK ASSIGNED\n"); |
| 339 | /* reset N3105 */ |
Max | 847ed9f | 2018-02-20 18:16:11 +0100 | [diff] [blame] | 340 | tbf->n_reset(N3105); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 341 | TBF_SET_ASS_STATE_DL(tbf, GPRS_RLCMAC_DL_ASS_NONE); |
| 342 | |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 343 | new_tbf = tbf->ms() ? ms_dl_tbf(tbf->ms()) : NULL; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 344 | if (!new_tbf) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 345 | LOGPDCH(this, DRLCMAC, LOGL_ERROR, "Got ACK, but DL " |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 346 | "TBF is gone TLLI=0x%08x\n", tlli); |
| 347 | return; |
| 348 | } |
| 349 | if (tbf->state_is(GPRS_RLCMAC_WAIT_RELEASE) && |
| 350 | tbf->direction == new_tbf->direction) |
| 351 | tbf_free(tbf); |
| 352 | |
| 353 | if (new_tbf->check_n_clear(GPRS_RLCMAC_FLAG_CCCH)) { |
| 354 | /* We now know that the PACCH really existed */ |
| 355 | LOGPTBF(new_tbf, LOGL_INFO, |
| 356 | "The TBF has been confirmed on the PACCH, " |
| 357 | "changed type from CCCH to PACCH\n"); |
| 358 | TBF_ASS_TYPE_SET(new_tbf, GPRS_RLCMAC_FLAG_PACCH); |
| 359 | } |
| 360 | TBF_SET_STATE(new_tbf, GPRS_RLCMAC_FLOW); |
| 361 | /* stop pending assignment timer */ |
| 362 | new_tbf->t_stop(T0, "control acked (DL-TBF)"); |
| 363 | if (new_tbf->check_n_clear(GPRS_RLCMAC_FLAG_TO_DL_ASS)) |
| 364 | LOGPTBF(new_tbf, LOGL_NOTICE, "Recovered downlink assignment\n"); |
| 365 | |
| 366 | tbf_assign_control_ts(new_tbf); |
| 367 | return; |
| 368 | } |
| 369 | if (tbf->ul_ass_state_is(GPRS_RLCMAC_UL_ASS_WAIT_ACK)) { |
| 370 | LOGPTBF(tbf, LOGL_DEBUG, "[DOWNLINK] UPLINK ASSIGNED\n"); |
| 371 | /* reset N3105 */ |
Max | 847ed9f | 2018-02-20 18:16:11 +0100 | [diff] [blame] | 372 | tbf->n_reset(N3105); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 373 | TBF_SET_ASS_STATE_UL(tbf, GPRS_RLCMAC_UL_ASS_NONE); |
| 374 | |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 375 | new_tbf = tbf->ms() ? ms_ul_tbf(tbf->ms()) : NULL; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 376 | if (!new_tbf) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 377 | LOGPDCH(this, DRLCMAC, LOGL_ERROR, "Got ACK, but UL " |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 378 | "TBF is gone TLLI=0x%08x\n", tlli); |
| 379 | return; |
| 380 | } |
| 381 | if (tbf->state_is(GPRS_RLCMAC_WAIT_RELEASE) && |
| 382 | tbf->direction == new_tbf->direction) |
| 383 | tbf_free(tbf); |
| 384 | |
| 385 | TBF_SET_STATE(new_tbf, GPRS_RLCMAC_FLOW); |
| 386 | if (new_tbf->check_n_clear(GPRS_RLCMAC_FLAG_TO_UL_ASS)) |
| 387 | LOGPTBF(new_tbf, LOGL_NOTICE, "Recovered uplink assignment for UL\n"); |
| 388 | |
| 389 | tbf_assign_control_ts(new_tbf); |
| 390 | /* there might be LLC packets waiting in the queue, but the DL |
| 391 | * TBF might have been released while the UL TBF has been |
| 392 | * established */ |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 393 | if (ms_need_dl_tbf(new_tbf->ms())) |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 394 | new_tbf->establish_dl_tbf_on_pacch(); |
| 395 | |
| 396 | return; |
| 397 | } |
Pau Espin Pedrol | 952cb3d | 2021-02-01 14:52:48 +0100 | [diff] [blame] | 398 | if (ms->nacc && ms->nacc->fi->state == NACC_ST_WAIT_CELL_CHG_CONTINUE_ACK && |
| 399 | ms->nacc->continue_poll_fn == fn && ms->nacc->continue_poll_ts == ts_no) { |
| 400 | osmo_fsm_inst_dispatch(ms->nacc->fi, NACC_EV_RX_CELL_CHG_CONTINUE_ACK, NULL); |
| 401 | /* Don't assume MS is no longer reachable (hence don't free) after this: TS 44.060 |
| 402 | * "When the mobile station receives the PACKET CELL CHANGE ORDER |
| 403 | * or the PACKET CELL CHANGE CONTINUE message the mobile station |
| 404 | * shall transmit a PACKET CONTROL ACKNOWLEDGMENT message in the |
| 405 | * specified uplink radio block if a valid RRBP field is |
| 406 | * received as part of the message; the mobile station _MAY_ then |
| 407 | * switch to a new cell." |
| 408 | */ |
| 409 | return; |
| 410 | } |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 411 | LOGPDCH(this, DRLCMAC, LOGL_ERROR, |
| 412 | "Error: received PACET CONTROL ACK at no request\n"); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 413 | } |
| 414 | |
Pau Espin Pedrol | e13cdc5 | 2019-09-25 13:46:14 +0200 | [diff] [blame] | 415 | void gprs_rlcmac_pdch::rcv_control_dl_ack_nack(Packet_Downlink_Ack_Nack_t *ack_nack, uint32_t fn, struct pcu_l1_meas *meas) |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 416 | { |
| 417 | int8_t tfi = 0; /* must be signed */ |
| 418 | struct gprs_rlcmac_dl_tbf *tbf; |
| 419 | int rc; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 420 | int num_blocks; |
| 421 | uint8_t bits_data[RLC_GPRS_WS/8]; |
| 422 | bitvec bits; |
| 423 | int bsn_begin, bsn_end; |
| 424 | char show_bits[RLC_GPRS_WS + 1]; |
| 425 | |
| 426 | tfi = ack_nack->DOWNLINK_TFI; |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 427 | tbf = bts_dl_tbf_by_poll_fn(bts(), fn, trx_no(), ts_no); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 428 | if (!tbf) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 429 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, "PACKET DOWNLINK ACK with " |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 430 | "unknown FN=%u TFI=%d (TRX %d TS %d)\n", |
| 431 | fn, tfi, trx_no(), ts_no); |
| 432 | return; |
| 433 | } |
| 434 | if (tbf->tfi() != tfi) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 435 | LOGPTBFDL(tbf, LOGL_NOTICE, |
| 436 | "PACKET DOWNLINK ACK with wrong TFI=%d, ignoring!\n", tfi); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 437 | return; |
| 438 | } |
| 439 | |
| 440 | /* Reset N3101 counter: */ |
Max | 847ed9f | 2018-02-20 18:16:11 +0100 | [diff] [blame] | 441 | tbf->n_reset(N3101); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 442 | |
| 443 | if (tbf->handle_ack_nack()) |
| 444 | LOGPTBF(tbf, LOGL_NOTICE, "Recovered downlink ack\n"); |
| 445 | |
| 446 | LOGPTBF(tbf, LOGL_DEBUG, "RX: [PCU <- BTS] Packet Downlink Ack/Nack\n"); |
| 447 | |
| 448 | bits.data = bits_data; |
| 449 | bits.data_len = sizeof(bits_data); |
| 450 | bits.cur_bit = 0; |
| 451 | |
| 452 | num_blocks = Decoding::decode_gprs_acknack_bits( |
| 453 | &ack_nack->Ack_Nack_Description, &bits, |
Pau Espin Pedrol | b3f2397 | 2020-10-23 21:00:23 +0200 | [diff] [blame] | 454 | &bsn_begin, &bsn_end, static_cast<gprs_rlc_dl_window *>(tbf->window())); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 455 | |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 456 | LOGPDCH(this, DRLCMAC, LOGL_DEBUG, |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 457 | "Got GPRS DL ACK bitmap: SSN: %d, BSN %d to %d - 1 (%d blocks), " |
| 458 | "\"%s\"\n", |
| 459 | ack_nack->Ack_Nack_Description.STARTING_SEQUENCE_NUMBER, |
| 460 | bsn_begin, bsn_end, num_blocks, |
| 461 | (Decoding::extract_rbb(&bits, show_bits), show_bits)); |
| 462 | |
| 463 | rc = tbf->rcvd_dl_ack( |
| 464 | ack_nack->Ack_Nack_Description.FINAL_ACK_INDICATION, |
| 465 | bsn_begin, &bits); |
| 466 | if (rc == 1) { |
| 467 | tbf_free(tbf); |
| 468 | return; |
| 469 | } |
| 470 | /* check for channel request */ |
| 471 | if (ack_nack->Exist_Channel_Request_Description) |
Pau Espin Pedrol | 0ece97d | 2021-01-18 12:53:54 +0100 | [diff] [blame] | 472 | sched_ul_ass_or_rej(bts(), tbf); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 473 | |
| 474 | /* get measurements */ |
| 475 | if (tbf->ms()) { |
Pau Espin Pedrol | e13cdc5 | 2019-09-25 13:46:14 +0200 | [diff] [blame] | 476 | get_meas(meas, &ack_nack->Channel_Quality_Report); |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 477 | ms_update_l1_meas(tbf->ms(), meas); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 478 | } |
| 479 | } |
| 480 | |
Pau Espin Pedrol | e13cdc5 | 2019-09-25 13:46:14 +0200 | [diff] [blame] | 481 | void gprs_rlcmac_pdch::rcv_control_egprs_dl_ack_nack(EGPRS_PD_AckNack_t *ack_nack, uint32_t fn, struct pcu_l1_meas *meas) |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 482 | { |
| 483 | int8_t tfi = 0; /* must be signed */ |
| 484 | struct gprs_rlcmac_dl_tbf *tbf; |
Pau Espin Pedrol | b3f2397 | 2020-10-23 21:00:23 +0200 | [diff] [blame] | 485 | gprs_rlc_dl_window *window; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 486 | int rc; |
| 487 | int num_blocks; |
| 488 | uint8_t bits_data[RLC_EGPRS_MAX_WS/8]; |
| 489 | char show_bits[RLC_EGPRS_MAX_WS + 1]; |
| 490 | bitvec bits; |
| 491 | int bsn_begin, bsn_end; |
| 492 | |
| 493 | tfi = ack_nack->DOWNLINK_TFI; |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 494 | tbf = bts_dl_tbf_by_poll_fn(bts(), fn, trx_no(), ts_no); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 495 | if (!tbf) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 496 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, "EGPRS PACKET DOWNLINK ACK with " |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 497 | "unknown FN=%u TFI=%d (TRX %d TS %d)\n", |
| 498 | fn, tfi, trx_no(), ts_no); |
| 499 | return; |
| 500 | } |
| 501 | if (tbf->tfi() != tfi) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 502 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, "EGPRS PACKET DOWNLINK ACK with " |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 503 | "wrong TFI=%d, ignoring!\n", tfi); |
| 504 | return; |
| 505 | } |
| 506 | |
| 507 | /* Reset N3101 counter: */ |
Max | 847ed9f | 2018-02-20 18:16:11 +0100 | [diff] [blame] | 508 | tbf->n_reset(N3101); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 509 | |
| 510 | if (tbf->handle_ack_nack()) |
| 511 | LOGPTBF(tbf, LOGL_NOTICE, "Recovered EGPRS downlink ack\n"); |
| 512 | |
| 513 | LOGPTBF(tbf, LOGL_DEBUG, |
| 514 | "RX: [PCU <- BTS] EGPRS Packet Downlink Ack/Nack\n"); |
| 515 | |
Pau Espin Pedrol | b3f2397 | 2020-10-23 21:00:23 +0200 | [diff] [blame] | 516 | window = static_cast<gprs_rlc_dl_window *>(tbf->window()); |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 517 | LOGPDCH(this, DRLCMAC, LOGL_DEBUG, "EGPRS ACK/NACK: " |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 518 | "ut: %d, final: %d, bow: %d, eow: %d, ssn: %d, have_crbb: %d, " |
| 519 | "urbb_len:%d, %p, %p, %d, %d, win: %d-%d, urbb: %s\n", |
| 520 | (int)ack_nack->EGPRS_AckNack.UnionType, |
| 521 | (int)ack_nack->EGPRS_AckNack.Desc.FINAL_ACK_INDICATION, |
| 522 | (int)ack_nack->EGPRS_AckNack.Desc.BEGINNING_OF_WINDOW, |
| 523 | (int)ack_nack->EGPRS_AckNack.Desc.END_OF_WINDOW, |
| 524 | (int)ack_nack->EGPRS_AckNack.Desc.STARTING_SEQUENCE_NUMBER, |
| 525 | (int)ack_nack->EGPRS_AckNack.Desc.Exist_CRBB, |
| 526 | (int)ack_nack->EGPRS_AckNack.Desc.URBB_LENGTH, |
| 527 | (void *)&ack_nack->EGPRS_AckNack.UnionType, |
| 528 | (void *)&ack_nack->EGPRS_AckNack.Desc, |
| 529 | (int)offsetof(EGPRS_AckNack_t, Desc), |
| 530 | (int)offsetof(EGPRS_AckNack_w_len_t, Desc), |
Pau Espin Pedrol | b3f2397 | 2020-10-23 21:00:23 +0200 | [diff] [blame] | 531 | window->v_a(), |
| 532 | window->v_s(), |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 533 | osmo_hexdump((const uint8_t *)&ack_nack->EGPRS_AckNack.Desc.URBB, |
| 534 | sizeof(ack_nack->EGPRS_AckNack.Desc.URBB))); |
| 535 | |
| 536 | bits.data = bits_data; |
| 537 | bits.data_len = sizeof(bits_data); |
| 538 | bits.cur_bit = 0; |
| 539 | |
| 540 | num_blocks = Decoding::decode_egprs_acknack_bits( |
| 541 | &ack_nack->EGPRS_AckNack.Desc, &bits, |
Pau Espin Pedrol | b3f2397 | 2020-10-23 21:00:23 +0200 | [diff] [blame] | 542 | &bsn_begin, &bsn_end, window); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 543 | |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 544 | LOGPDCH(this, DRLCMAC, LOGL_DEBUG, |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 545 | "Got EGPRS DL ACK bitmap: SSN: %d, BSN %d to %d - 1 (%d blocks), " |
| 546 | "\"%s\"\n", |
| 547 | ack_nack->EGPRS_AckNack.Desc.STARTING_SEQUENCE_NUMBER, |
| 548 | bsn_begin, bsn_end, num_blocks, |
| 549 | (Decoding::extract_rbb(&bits, show_bits), show_bits) |
| 550 | ); |
| 551 | |
| 552 | rc = tbf->rcvd_dl_ack( |
| 553 | ack_nack->EGPRS_AckNack.Desc.FINAL_ACK_INDICATION, |
| 554 | bsn_begin, &bits); |
| 555 | if (rc == 1) { |
| 556 | tbf_free(tbf); |
| 557 | return; |
| 558 | } |
| 559 | |
| 560 | /* check for channel request */ |
| 561 | if (ack_nack->Exist_ChannelRequestDescription) |
Pau Espin Pedrol | 0ece97d | 2021-01-18 12:53:54 +0100 | [diff] [blame] | 562 | sched_ul_ass_or_rej(bts(), tbf); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 563 | |
| 564 | /* get measurements */ |
| 565 | if (tbf->ms()) { |
| 566 | /* TODO: Implement Measurements parsing for EGPRS */ |
| 567 | /* |
Pau Espin Pedrol | e13cdc5 | 2019-09-25 13:46:14 +0200 | [diff] [blame] | 568 | get_meas(meas, &ack_nack->Channel_Quality_Report); |
| 569 | tbf->ms()->update_l1_meas(meas); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 570 | */ |
| 571 | } |
| 572 | } |
| 573 | |
Pau Espin Pedrol | e13cdc5 | 2019-09-25 13:46:14 +0200 | [diff] [blame] | 574 | void gprs_rlcmac_pdch::rcv_resource_request(Packet_Resource_Request_t *request, uint32_t fn, struct pcu_l1_meas *meas) |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 575 | { |
| 576 | struct gprs_rlcmac_sba *sba; |
| 577 | |
| 578 | if (request->ID.UnionType) { |
Pau Espin Pedrol | ce60011 | 2020-05-12 19:20:10 +0200 | [diff] [blame] | 579 | struct gprs_rlcmac_ul_tbf *ul_tbf; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 580 | uint32_t tlli = request->ID.u.TLLI; |
Pau Espin Pedrol | 9e7361a | 2020-07-08 17:35:12 +0200 | [diff] [blame] | 581 | bool ms_found = true; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 582 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 583 | GprsMs *ms = bts_ms_by_tlli(bts(), tlli, GSM_RESERVED_TMSI); |
Pau Espin Pedrol | ce60011 | 2020-05-12 19:20:10 +0200 | [diff] [blame] | 584 | if (!ms) { |
Pau Espin Pedrol | 9e7361a | 2020-07-08 17:35:12 +0200 | [diff] [blame] | 585 | ms_found = false; |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 586 | ms = bts_alloc_ms(bts(), 0, 0); /* ms class updated later */ |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 587 | ms_set_tlli(ms, tlli); |
Pau Espin Pedrol | ce60011 | 2020-05-12 19:20:10 +0200 | [diff] [blame] | 588 | } |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 589 | ul_tbf = ms_ul_tbf(ms); /* hence ul_tbf may be NULL */ |
Pau Espin Pedrol | 17402a5 | 2020-05-08 17:44:33 +0200 | [diff] [blame] | 590 | |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 591 | /* Keep the ms, even if it gets idle temporarily */ |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 592 | ms_ref(ms); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 593 | |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 594 | LOGPDCH(this, DRLCMAC, LOGL_DEBUG, "MS requests UL TBF " |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 595 | "in packet resource request of single " |
| 596 | "block, so we provide one:\n"); |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 597 | sba = bts_sba(bts())->find(this, fn); |
Pau Espin Pedrol | 9e7361a | 2020-07-08 17:35:12 +0200 | [diff] [blame] | 598 | if (sba) { |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 599 | ms_set_ta(ms, sba->ta); |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 600 | bts_sba(bts())->free_sba(sba); |
Pau Espin Pedrol | 9e7361a | 2020-07-08 17:35:12 +0200 | [diff] [blame] | 601 | } else if (!ul_tbf || !ul_tbf->state_is(GPRS_RLCMAC_FINISHED)) { |
| 602 | LOGPTBFUL(ul_tbf, LOGL_NOTICE, |
| 603 | "MS requests UL TBF in PACKET RESOURCE REQ of " |
| 604 | "single block, but there is no resource request " |
| 605 | "scheduled!\n"); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 606 | } |
Pau Espin Pedrol | 9e7361a | 2020-07-08 17:35:12 +0200 | [diff] [blame] | 607 | /* else: Resource Request can be received even if not scheduled |
| 608 | by the network since it's used by MS to re-establish a new UL |
| 609 | TBF when last one has finished. */ |
| 610 | |
Pau Espin Pedrol | e50ce6e | 2020-03-23 18:49:16 +0100 | [diff] [blame] | 611 | if (request->Exist_MS_Radio_Access_capability2) { |
Pau Espin Pedrol | 17402a5 | 2020-05-08 17:44:33 +0200 | [diff] [blame] | 612 | uint8_t ms_class, egprs_ms_class; |
Pau Espin Pedrol | 8a35e64 | 2021-01-18 17:14:14 +0100 | [diff] [blame] | 613 | ms_class = get_ms_class_by_capability(&request->MS_Radio_Access_capability2); |
| 614 | egprs_ms_class = get_egprs_ms_class_by_capability(&request->MS_Radio_Access_capability2); |
Pau Espin Pedrol | bcb226d | 2020-07-08 17:18:22 +0200 | [diff] [blame] | 615 | if (ms_class) |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 616 | ms_set_ms_class(ms, ms_class); |
Pau Espin Pedrol | bcb226d | 2020-07-08 17:18:22 +0200 | [diff] [blame] | 617 | if (egprs_ms_class) |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 618 | ms_set_egprs_ms_class(ms, egprs_ms_class); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 619 | } |
Pau Espin Pedrol | 17402a5 | 2020-05-08 17:44:33 +0200 | [diff] [blame] | 620 | |
Pau Espin Pedrol | 9e7361a | 2020-07-08 17:35:12 +0200 | [diff] [blame] | 621 | /* Get rid of previous finished UL TBF before providing a new one */ |
| 622 | if (ms_found && ul_tbf) { |
| 623 | if (!ul_tbf->state_is(GPRS_RLCMAC_FINISHED)) |
| 624 | LOGPTBFUL(ul_tbf, LOGL_NOTICE, |
| 625 | "Got PACKET RESOURCE REQ while TBF not finished, killing pending UL TBF\n"); |
| 626 | tbf_free(ul_tbf); |
| 627 | } |
| 628 | |
Pau Espin Pedrol | 0ece97d | 2021-01-18 12:53:54 +0100 | [diff] [blame] | 629 | ul_tbf = tbf_alloc_ul(bts(), ms, trx_no(), tlli); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 630 | if (!ul_tbf) { |
Pau Espin Pedrol | 0ece97d | 2021-01-18 12:53:54 +0100 | [diff] [blame] | 631 | handle_tbf_reject(bts(), ms, tlli, |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 632 | trx_no(), ts_no); |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 633 | goto return_unref; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 634 | } |
| 635 | |
| 636 | /* set control ts to current MS's TS, until assignment complete */ |
Pau Espin Pedrol | 506eb23 | 2019-12-24 13:02:48 +0100 | [diff] [blame] | 637 | LOGPTBF(ul_tbf, LOGL_DEBUG, "change control TS %d -> %d until assignment is complete.\n", |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 638 | ul_tbf->control_ts, ts_no); |
| 639 | |
| 640 | ul_tbf->control_ts = ts_no; |
| 641 | /* schedule uplink assignment */ |
| 642 | TBF_SET_ASS_STATE_UL(ul_tbf, GPRS_RLCMAC_UL_ASS_SEND_ASS); |
| 643 | |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 644 | /* get measurements */ |
| 645 | if (ul_tbf->ms()) { |
Pau Espin Pedrol | e13cdc5 | 2019-09-25 13:46:14 +0200 | [diff] [blame] | 646 | get_meas(meas, request); |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 647 | ms_update_l1_meas(ul_tbf->ms(), meas); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 648 | } |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 649 | return_unref: |
| 650 | ms_unref(ms); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 651 | return; |
| 652 | } |
| 653 | |
| 654 | if (request->ID.u.Global_TFI.UnionType) { |
| 655 | struct gprs_rlcmac_dl_tbf *dl_tbf; |
| 656 | int8_t tfi = request->ID.u.Global_TFI.u.DOWNLINK_TFI; |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 657 | dl_tbf = bts_dl_tbf_by_tfi(bts(), tfi, trx_no(), ts_no); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 658 | if (!dl_tbf) { |
Thorsten Alteholz | 8bb7904 | 2018-10-06 10:42:58 +0200 | [diff] [blame] | 659 | LOGP(DRLCMAC, LOGL_NOTICE, "PACKET RESOURCE REQ unknown downlink TFI=%d\n", tfi); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 660 | return; |
| 661 | } |
| 662 | LOGPTBFDL(dl_tbf, LOGL_ERROR, |
| 663 | "RX: [PCU <- BTS] FIXME: Packet resource request\n"); |
| 664 | |
| 665 | /* Reset N3101 counter: */ |
Max | 847ed9f | 2018-02-20 18:16:11 +0100 | [diff] [blame] | 666 | dl_tbf->n_reset(N3101); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 667 | } else { |
| 668 | struct gprs_rlcmac_ul_tbf *ul_tbf; |
| 669 | int8_t tfi = request->ID.u.Global_TFI.u.UPLINK_TFI; |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 670 | ul_tbf = bts_ul_tbf_by_tfi(bts(), tfi, trx_no(), ts_no); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 671 | if (!ul_tbf) { |
Thorsten Alteholz | 8bb7904 | 2018-10-06 10:42:58 +0200 | [diff] [blame] | 672 | LOGP(DRLCMAC, LOGL_NOTICE, "PACKET RESOURCE REQ unknown uplink TFI=%d\n", tfi); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 673 | return; |
| 674 | } |
| 675 | LOGPTBFUL(ul_tbf, LOGL_ERROR, |
| 676 | "RX: [PCU <- BTS] FIXME: Packet resource request\n"); |
| 677 | |
| 678 | /* Reset N3101 counter: */ |
Max | 847ed9f | 2018-02-20 18:16:11 +0100 | [diff] [blame] | 679 | ul_tbf->n_reset(N3101); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 680 | } |
| 681 | } |
| 682 | |
| 683 | void gprs_rlcmac_pdch::rcv_measurement_report(Packet_Measurement_Report_t *report, uint32_t fn) |
| 684 | { |
Pau Espin Pedrol | b69928c | 2020-08-18 20:29:40 +0200 | [diff] [blame] | 685 | struct gprs_rlcmac_sba *sba; |
| 686 | GprsMs *ms; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 687 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 688 | ms = bts_ms_by_tlli(bts(), report->TLLI, GSM_RESERVED_TMSI); |
Pau Espin Pedrol | b69928c | 2020-08-18 20:29:40 +0200 | [diff] [blame] | 689 | if (!ms) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 690 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, "MS send measurement " |
| 691 | "but TLLI 0x%08x is unknown\n", report->TLLI); |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 692 | ms = bts_alloc_ms(bts(), 0, 0); |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 693 | ms_set_tlli(ms, report->TLLI); |
Pau Espin Pedrol | b69928c | 2020-08-18 20:29:40 +0200 | [diff] [blame] | 694 | } |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 695 | if ((sba = bts_sba(bts())->find(this, fn))) { |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 696 | ms_set_ta(ms, sba->ta); |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 697 | bts_sba(bts())->free_sba(sba); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 698 | } |
Pau Espin Pedrol | b69928c | 2020-08-18 20:29:40 +0200 | [diff] [blame] | 699 | gprs_rlcmac_meas_rep(ms, report); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 700 | } |
| 701 | |
Pau Espin Pedrol | c0a250d | 2021-01-21 18:46:13 +0100 | [diff] [blame] | 702 | void gprs_rlcmac_pdch::rcv_cell_change_notification(Packet_Cell_Change_Notification_t *notif, |
| 703 | uint32_t fn, struct pcu_l1_meas *meas) |
| 704 | { |
| 705 | GprsMs *ms; |
| 706 | |
| 707 | bts_do_rate_ctr_inc(bts(), CTR_PKT_CELL_CHG_NOTIFICATION); |
| 708 | |
| 709 | if (notif->Global_TFI.UnionType == 0) { |
| 710 | struct gprs_rlcmac_ul_tbf *ul_tbf = ul_tbf_by_tfi(notif->Global_TFI.u.UPLINK_TFI); |
| 711 | if (!ul_tbf) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 712 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, "UL TBF TFI=0x%2x not found\n", notif->Global_TFI.u.UPLINK_TFI); |
Pau Espin Pedrol | c0a250d | 2021-01-21 18:46:13 +0100 | [diff] [blame] | 713 | return; |
| 714 | } |
| 715 | ms = ul_tbf->ms(); |
| 716 | } else if (notif->Global_TFI.UnionType == 1) { |
| 717 | struct gprs_rlcmac_dl_tbf *dl_tbf = dl_tbf_by_tfi(notif->Global_TFI.u.DOWNLINK_TFI); |
| 718 | if (!dl_tbf) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 719 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, "DL TBF TFI=0x%2x not found\n", notif->Global_TFI.u.DOWNLINK_TFI); |
Pau Espin Pedrol | c0a250d | 2021-01-21 18:46:13 +0100 | [diff] [blame] | 720 | return; |
| 721 | } |
| 722 | ms = dl_tbf->ms(); |
| 723 | } else { OSMO_ASSERT(0); } |
| 724 | |
| 725 | ms_update_l1_meas(ms, meas); |
| 726 | ms_nacc_start(ms, notif); |
| 727 | } |
| 728 | |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 729 | /* Received Uplink RLC control block. */ |
Pau Espin Pedrol | 812d466 | 2019-09-25 13:35:11 +0200 | [diff] [blame] | 730 | int gprs_rlcmac_pdch::rcv_control_block(const uint8_t *data, uint8_t data_len, |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 731 | uint32_t fn, struct pcu_l1_meas *meas, enum CodingScheme cs) |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 732 | { |
Pau Espin Pedrol | 812d466 | 2019-09-25 13:35:11 +0200 | [diff] [blame] | 733 | bitvec *rlc_block; |
| 734 | RlcMacUplink_t *ul_control_block; |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 735 | unsigned len = mcs_max_bytes_ul(cs); |
Pau Espin Pedrol | 5e300ce | 2020-02-03 17:18:03 +0100 | [diff] [blame] | 736 | int rc; |
Pau Espin Pedrol | 812d466 | 2019-09-25 13:35:11 +0200 | [diff] [blame] | 737 | |
| 738 | if (!(rlc_block = bitvec_alloc(len, tall_pcu_ctx))) |
| 739 | return -ENOMEM; |
| 740 | bitvec_unpack(rlc_block, data); |
| 741 | ul_control_block = (RlcMacUplink_t *)talloc_zero(tall_pcu_ctx, RlcMacUplink_t); |
| 742 | |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 743 | LOGPDCH(this, DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ RX : Uplink Control Block +++++++++++++++++++++++++\n"); |
Keith | 6fd8ffb | 2020-03-05 19:48:24 -0600 | [diff] [blame] | 744 | |
Keith | 2b6acd8 | 2020-03-26 16:33:59 -0500 | [diff] [blame] | 745 | rc = decode_gsm_rlcmac_uplink(rlc_block, ul_control_block); |
Keith | 6fd8ffb | 2020-03-05 19:48:24 -0600 | [diff] [blame] | 746 | if (ul_control_block->u.MESSAGE_TYPE == MT_PACKET_UPLINK_DUMMY_CONTROL_BLOCK) |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 747 | bts_send_gsmtap_meas(bts(), PCU_GSMTAP_C_UL_DUMMY, true, trx_no(), ts_no, GSMTAP_CHANNEL_PACCH, fn, data, data_len, meas); |
Keith | 6fd8ffb | 2020-03-05 19:48:24 -0600 | [diff] [blame] | 748 | else |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 749 | bts_send_gsmtap_meas(bts(), PCU_GSMTAP_C_UL_CTRL, true, trx_no(), ts_no, GSMTAP_CHANNEL_PACCH, fn, data, data_len, meas); |
Keith | 6fd8ffb | 2020-03-05 19:48:24 -0600 | [diff] [blame] | 750 | |
Pau Espin Pedrol | 16705a4 | 2020-10-27 10:24:57 +0100 | [diff] [blame] | 751 | if (rc < 0) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 752 | LOGPDCH(this, DRLCMACUL, LOGL_ERROR, "Dropping Uplink Control Block " |
| 753 | "with invalid content, decode failed: %d)\n", rc); |
Pau Espin Pedrol | 5e300ce | 2020-02-03 17:18:03 +0100 | [diff] [blame] | 754 | goto free_ret; |
| 755 | } |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 756 | LOGPDCH(this, DRLCMAC, LOGL_DEBUG, "------------------------- RX : Uplink Control Block -------------------------\n"); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 757 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 758 | bts_do_rate_ctr_inc(bts(), CTR_RLC_RECV_CONTROL); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 759 | switch (ul_control_block->u.MESSAGE_TYPE) { |
| 760 | case MT_PACKET_CONTROL_ACK: |
| 761 | rcv_control_ack(&ul_control_block->u.Packet_Control_Acknowledgement, fn); |
| 762 | break; |
| 763 | case MT_PACKET_DOWNLINK_ACK_NACK: |
Pau Espin Pedrol | e13cdc5 | 2019-09-25 13:46:14 +0200 | [diff] [blame] | 764 | rcv_control_dl_ack_nack(&ul_control_block->u.Packet_Downlink_Ack_Nack, fn, meas); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 765 | break; |
| 766 | case MT_EGPRS_PACKET_DOWNLINK_ACK_NACK: |
Pau Espin Pedrol | e13cdc5 | 2019-09-25 13:46:14 +0200 | [diff] [blame] | 767 | rcv_control_egprs_dl_ack_nack(&ul_control_block->u.Egprs_Packet_Downlink_Ack_Nack, fn, meas); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 768 | break; |
| 769 | case MT_PACKET_RESOURCE_REQUEST: |
Pau Espin Pedrol | e13cdc5 | 2019-09-25 13:46:14 +0200 | [diff] [blame] | 770 | rcv_resource_request(&ul_control_block->u.Packet_Resource_Request, fn, meas); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 771 | break; |
| 772 | case MT_PACKET_MEASUREMENT_REPORT: |
| 773 | rcv_measurement_report(&ul_control_block->u.Packet_Measurement_Report, fn); |
| 774 | break; |
| 775 | case MT_PACKET_UPLINK_DUMMY_CONTROL_BLOCK: |
| 776 | /* ignoring it. change the SI to not force sending these? */ |
| 777 | break; |
Pau Espin Pedrol | c0a250d | 2021-01-21 18:46:13 +0100 | [diff] [blame] | 778 | case MT_PACKET_CELL_CHANGE_NOTIFICATION: |
| 779 | rcv_cell_change_notification(&ul_control_block->u.Packet_Cell_Change_Notification, fn, meas); |
| 780 | break; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 781 | default: |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 782 | bts_do_rate_ctr_inc(bts(), CTR_DECODE_ERRORS); |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 783 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 784 | "RX: [PCU <- BTS] unknown control block(%d) received\n", |
| 785 | ul_control_block->u.MESSAGE_TYPE); |
| 786 | } |
Pau Espin Pedrol | 5e300ce | 2020-02-03 17:18:03 +0100 | [diff] [blame] | 787 | free_ret: |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 788 | talloc_free(ul_control_block); |
Pau Espin Pedrol | 812d466 | 2019-09-25 13:35:11 +0200 | [diff] [blame] | 789 | bitvec_free(rlc_block); |
Pau Espin Pedrol | 5e300ce | 2020-02-03 17:18:03 +0100 | [diff] [blame] | 790 | return rc; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 791 | } |
| 792 | |
| 793 | /* received RLC/MAC block from L1 */ |
| 794 | int gprs_rlcmac_pdch::rcv_block(uint8_t *data, uint8_t len, uint32_t fn, |
| 795 | struct pcu_l1_meas *meas) |
| 796 | { |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 797 | enum CodingScheme cs = mcs_get_by_size_ul(len); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 798 | if (!cs) { |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 799 | bts_do_rate_ctr_inc(bts(), CTR_DECODE_ERRORS); |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 800 | LOGPDCH(this, DRLCMACUL, LOGL_ERROR, "Dropping data block with invalid " |
| 801 | "length %d: %s\n", len, osmo_hexdump(data, len)); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 802 | return -EINVAL; |
| 803 | } |
| 804 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 805 | bts_do_rate_ctr_add(bts(), CTR_RLC_UL_BYTES, len); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 806 | |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 807 | LOGPDCH(this, DRLCMACUL, LOGL_DEBUG, "Got RLC block, coding scheme: %s, " |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 808 | "length: %d (%d))\n", mcs_name(cs), len, mcs_used_size_ul(cs)); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 809 | |
Max | 8a8e0fb | 2019-03-25 16:32:50 +0100 | [diff] [blame] | 810 | if (mcs_is_gprs(cs)) |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 811 | return rcv_block_gprs(data, len, fn, meas, cs); |
| 812 | |
Max | 8a8e0fb | 2019-03-25 16:32:50 +0100 | [diff] [blame] | 813 | if (mcs_is_edge(cs)) |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 814 | return rcv_data_block(data, len, fn, meas, cs); |
| 815 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 816 | bts_do_rate_ctr_inc(bts(), CTR_DECODE_ERRORS); |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 817 | LOGPDCH(this, DRLCMACUL, LOGL_ERROR, "Unsupported coding scheme %s\n", |
Max | 136ebcc | 2019-03-05 14:59:03 +0100 | [diff] [blame] | 818 | mcs_name(cs)); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 819 | return -EINVAL; |
| 820 | } |
| 821 | |
| 822 | /*! \brief process egprs and gprs data blocks */ |
| 823 | int gprs_rlcmac_pdch::rcv_data_block(uint8_t *data, uint8_t data_len, uint32_t fn, |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 824 | struct pcu_l1_meas *meas, enum CodingScheme cs) |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 825 | { |
| 826 | int rc; |
| 827 | struct gprs_rlc_data_info rlc_dec; |
| 828 | struct gprs_rlcmac_ul_tbf *tbf; |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 829 | unsigned len = mcs_size_ul(cs); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 830 | |
| 831 | /* These are always data blocks, since EGPRS still uses CS-1 for |
| 832 | * control blocks (see 44.060, section 10.3, 1st par.) |
| 833 | */ |
Max | 8a8e0fb | 2019-03-25 16:32:50 +0100 | [diff] [blame] | 834 | if (mcs_is_edge(cs)) { |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 835 | bts_send_gsmtap_meas(bts(), PCU_GSMTAP_C_UL_DATA_EGPRS, true, |
Pau Espin Pedrol | 0b0391f | 2020-05-19 17:23:23 +0200 | [diff] [blame] | 836 | trx_no(), ts_no, GSMTAP_CHANNEL_PDTCH, fn, |
| 837 | data, data_len, meas); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 838 | } else { |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 839 | bts_send_gsmtap_meas(bts(), PCU_GSMTAP_C_UL_DATA_GPRS, true, |
Pau Espin Pedrol | 0b0391f | 2020-05-19 17:23:23 +0200 | [diff] [blame] | 840 | trx_no(), ts_no, GSMTAP_CHANNEL_PDTCH, fn, |
| 841 | data, data_len, meas); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 842 | } |
| 843 | |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 844 | LOGPDCH(this, DRLCMACUL, LOGL_DEBUG, " UL data: %s\n", osmo_hexdump(data, len)); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 845 | |
| 846 | rc = Decoding::rlc_parse_ul_data_header(&rlc_dec, data, cs); |
| 847 | if (rc < 0) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 848 | LOGPDCH(this, DRLCMACUL, LOGL_ERROR, |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 849 | "Got %s RLC block but header parsing has failed\n", |
Max | 136ebcc | 2019-03-05 14:59:03 +0100 | [diff] [blame] | 850 | mcs_name(cs)); |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 851 | bts_do_rate_ctr_inc(bts(), CTR_DECODE_ERRORS); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 852 | return rc; |
| 853 | } |
| 854 | |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 855 | LOGPDCH(this, DRLCMACUL, LOGL_INFO, |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 856 | "Got %s RLC block: " |
| 857 | "R=%d, SI=%d, TFI=%d, CPS=%d, RSB=%d, " |
| 858 | "rc=%d\n", |
Max | 136ebcc | 2019-03-05 14:59:03 +0100 | [diff] [blame] | 859 | mcs_name(cs), |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 860 | rlc_dec.r, rlc_dec.si, rlc_dec.tfi, rlc_dec.cps, rlc_dec.rsb, |
| 861 | rc); |
| 862 | |
| 863 | /* find TBF inst from given TFI */ |
| 864 | tbf = ul_tbf_by_tfi(rlc_dec.tfi); |
| 865 | if (!tbf) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 866 | LOGPDCH(this, DRLCMACUL, LOGL_NOTICE, "UL DATA unknown TFI=%d\n", |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 867 | rlc_dec.tfi); |
| 868 | return 0; |
| 869 | } |
| 870 | |
| 871 | /* Reset N3101 counter: */ |
Max | 847ed9f | 2018-02-20 18:16:11 +0100 | [diff] [blame] | 872 | tbf->n_reset(N3101); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 873 | |
| 874 | return tbf->rcv_data_block_acknowledged(&rlc_dec, data, meas); |
| 875 | } |
| 876 | |
| 877 | int gprs_rlcmac_pdch::rcv_block_gprs(uint8_t *data, uint8_t data_len, uint32_t fn, |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 878 | struct pcu_l1_meas *meas, enum CodingScheme cs) |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 879 | { |
| 880 | unsigned payload = data[0] >> 6; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 881 | int rc = 0; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 882 | |
| 883 | switch (payload) { |
| 884 | case GPRS_RLCMAC_DATA_BLOCK: |
| 885 | rc = rcv_data_block(data, data_len, fn, meas, cs); |
| 886 | break; |
| 887 | case GPRS_RLCMAC_CONTROL_BLOCK: |
Pau Espin Pedrol | e13cdc5 | 2019-09-25 13:46:14 +0200 | [diff] [blame] | 888 | rc = rcv_control_block(data, data_len, fn, meas, cs); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 889 | break; |
| 890 | case GPRS_RLCMAC_CONTROL_BLOCK_OPT: |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 891 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, "GPRS_RLCMAC_CONTROL_BLOCK_OPT block payload is not supported.\n"); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 892 | break; |
| 893 | default: |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 894 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, "Unknown RLCMAC block payload(%u).\n", payload); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 895 | rc = -EINVAL; |
| 896 | } |
| 897 | |
| 898 | return rc; |
| 899 | } |
| 900 | |
| 901 | gprs_rlcmac_tbf *gprs_rlcmac_pdch::tbf_from_list_by_tfi( |
| 902 | LListHead<gprs_rlcmac_tbf> *tbf_list, uint8_t tfi, |
| 903 | enum gprs_rlcmac_tbf_direction dir) |
| 904 | { |
| 905 | gprs_rlcmac_tbf *tbf; |
| 906 | LListHead<gprs_rlcmac_tbf> *pos; |
| 907 | |
| 908 | llist_for_each(pos, tbf_list) { |
| 909 | tbf = pos->entry(); |
| 910 | if (tbf->tfi() != tfi) |
| 911 | continue; |
| 912 | if (!tbf->pdch[ts_no]) |
| 913 | continue; |
| 914 | return tbf; |
| 915 | } |
| 916 | return NULL; |
| 917 | } |
| 918 | |
| 919 | gprs_rlcmac_ul_tbf *gprs_rlcmac_pdch::ul_tbf_by_tfi(uint8_t tfi) |
| 920 | { |
| 921 | return as_ul_tbf(tbf_by_tfi(tfi, GPRS_RLCMAC_UL_TBF)); |
| 922 | } |
| 923 | |
| 924 | gprs_rlcmac_dl_tbf *gprs_rlcmac_pdch::dl_tbf_by_tfi(uint8_t tfi) |
| 925 | { |
| 926 | return as_dl_tbf(tbf_by_tfi(tfi, GPRS_RLCMAC_DL_TBF)); |
| 927 | } |
| 928 | |
| 929 | /* lookup TBF Entity (by TFI) */ |
| 930 | gprs_rlcmac_tbf *gprs_rlcmac_pdch::tbf_by_tfi(uint8_t tfi, |
| 931 | enum gprs_rlcmac_tbf_direction dir) |
| 932 | { |
| 933 | struct gprs_rlcmac_tbf *tbf; |
| 934 | |
| 935 | if (tfi >= 32) |
| 936 | return NULL; |
| 937 | |
| 938 | tbf = m_tbfs[dir][tfi]; |
| 939 | |
| 940 | if (!tbf) |
| 941 | return NULL; |
| 942 | |
| 943 | if (tbf->state_is_not(GPRS_RLCMAC_RELEASING)) { |
| 944 | return tbf; |
| 945 | } |
| 946 | |
| 947 | return NULL; |
| 948 | } |
| 949 | |
| 950 | void gprs_rlcmac_pdch::attach_tbf(gprs_rlcmac_tbf *tbf) |
| 951 | { |
| 952 | gprs_rlcmac_ul_tbf *ul_tbf; |
| 953 | |
| 954 | if (m_tbfs[tbf->direction][tbf->tfi()]) |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 955 | LOGPDCH(this, DRLCMAC, LOGL_ERROR, |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 956 | "%s has not been detached, overwriting it\n", |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 957 | m_tbfs[tbf->direction][tbf->tfi()]->name()); |
| 958 | |
| 959 | m_num_tbfs[tbf->direction] += 1; |
| 960 | if (tbf->direction == GPRS_RLCMAC_UL_TBF) { |
| 961 | ul_tbf = as_ul_tbf(tbf); |
| 962 | m_assigned_usf |= 1 << ul_tbf->m_usf[ts_no]; |
| 963 | } |
| 964 | m_assigned_tfi[tbf->direction] |= 1UL << tbf->tfi(); |
| 965 | m_tbfs[tbf->direction][tbf->tfi()] = tbf; |
| 966 | |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 967 | LOGPDCH(this, DRLCMAC, LOGL_INFO, "Attaching %s, %d TBFs, " |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 968 | "USFs = %02x, TFIs = %08x.\n", |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 969 | tbf->name(), m_num_tbfs[tbf->direction], |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 970 | m_assigned_usf, m_assigned_tfi[tbf->direction]); |
| 971 | } |
| 972 | |
| 973 | void gprs_rlcmac_pdch::detach_tbf(gprs_rlcmac_tbf *tbf) |
| 974 | { |
| 975 | gprs_rlcmac_ul_tbf *ul_tbf; |
| 976 | |
| 977 | OSMO_ASSERT(m_num_tbfs[tbf->direction] > 0); |
| 978 | |
| 979 | m_num_tbfs[tbf->direction] -= 1; |
| 980 | if (tbf->direction == GPRS_RLCMAC_UL_TBF) { |
| 981 | ul_tbf = as_ul_tbf(tbf); |
| 982 | m_assigned_usf &= ~(1 << ul_tbf->m_usf[ts_no]); |
| 983 | } |
| 984 | m_assigned_tfi[tbf->direction] &= ~(1UL << tbf->tfi()); |
| 985 | m_tbfs[tbf->direction][tbf->tfi()] = NULL; |
| 986 | |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 987 | LOGPDCH(this, DRLCMAC, LOGL_INFO, "Detaching %s, %d TBFs, " |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 988 | "USFs = %02x, TFIs = %08x.\n", |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 989 | tbf->name(), m_num_tbfs[tbf->direction], |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 990 | m_assigned_usf, m_assigned_tfi[tbf->direction]); |
| 991 | } |
| 992 | |
Pau Espin Pedrol | 2286288 | 2020-11-16 17:35:10 +0100 | [diff] [blame] | 993 | bool gprs_rlcmac_pdch::has_gprs_only_tbf_attached() const |
| 994 | { |
| 995 | unsigned int i; |
| 996 | unsigned int j; |
| 997 | for (i = 0; i < sizeof(m_assigned_tfi[0]); i++) { |
| 998 | for (j = 0; j < 2; j++) { |
| 999 | if (m_assigned_tfi[j] & (1UL << i)) { |
| 1000 | gprs_rlcmac_tbf *tbf = m_tbfs[j][i]; |
| 1001 | if (!tbf->is_egprs_enabled()) |
| 1002 | return true; |
| 1003 | } |
| 1004 | } |
| 1005 | } |
| 1006 | return false; |
| 1007 | } |
| 1008 | |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1009 | void gprs_rlcmac_pdch::reserve(enum gprs_rlcmac_tbf_direction dir) |
| 1010 | { |
| 1011 | m_num_reserved[dir] += 1; |
| 1012 | } |
| 1013 | |
| 1014 | void gprs_rlcmac_pdch::unreserve(enum gprs_rlcmac_tbf_direction dir) |
| 1015 | { |
| 1016 | OSMO_ASSERT(m_num_reserved[dir] > 0); |
| 1017 | m_num_reserved[dir] -= 1; |
| 1018 | } |
| 1019 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1020 | inline struct gprs_rlcmac_bts *gprs_rlcmac_pdch::bts() const |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1021 | { |
| 1022 | return trx->bts; |
| 1023 | } |
| 1024 | |
| 1025 | uint8_t gprs_rlcmac_pdch::trx_no() const |
| 1026 | { |
| 1027 | return trx->trx_no; |
| 1028 | } |
| 1029 | |
Vadim Yanitskiy | bd0dac3 | 2019-10-05 21:57:14 +0700 | [diff] [blame] | 1030 | /* PTCCH (Packet Timing Advance Control Channel) */ |
| 1031 | void gprs_rlcmac_pdch::init_ptcch_msg(void) |
| 1032 | { |
| 1033 | memset(ptcch_msg, PTCCH_TAI_FREE, PTCCH_TAI_NUM); |
| 1034 | memset(ptcch_msg + PTCCH_TAI_NUM, PTCCH_PADDING, 7); |
| 1035 | } |
| 1036 | |
| 1037 | uint8_t gprs_rlcmac_pdch::reserve_tai(uint8_t ta) |
| 1038 | { |
| 1039 | uint8_t tai; |
| 1040 | |
| 1041 | for (tai = 0; tai < PTCCH_TAI_NUM; tai++) { |
| 1042 | if (ptcch_msg[tai] == PTCCH_TAI_FREE) { |
| 1043 | ptcch_msg[tai] = ta; |
| 1044 | return tai; |
| 1045 | } |
| 1046 | } |
| 1047 | |
| 1048 | /* Special case: no free TAI available */ |
| 1049 | return PTCCH_TAI_FREE; |
| 1050 | } |
| 1051 | |
| 1052 | void gprs_rlcmac_pdch::release_tai(uint8_t tai) |
| 1053 | { |
| 1054 | OSMO_ASSERT(tai < PTCCH_TAI_NUM); |
| 1055 | ptcch_msg[tai] = PTCCH_TAI_FREE; |
| 1056 | } |
| 1057 | |
| 1058 | void gprs_rlcmac_pdch::update_ta(uint8_t tai, uint8_t ta) |
| 1059 | { |
| 1060 | OSMO_ASSERT(tai < PTCCH_TAI_NUM); |
| 1061 | ptcch_msg[tai] = ta; |
| 1062 | } |
Pau Espin Pedrol | 906aafc | 2021-01-18 17:53:29 +0100 | [diff] [blame] | 1063 | |
| 1064 | void pdch_free_all_tbf(struct gprs_rlcmac_pdch *pdch) |
| 1065 | { |
| 1066 | for (uint8_t tfi = 0; tfi < 32; tfi++) { |
| 1067 | struct gprs_rlcmac_tbf *tbf; |
| 1068 | |
| 1069 | tbf = pdch->ul_tbf_by_tfi(tfi); |
| 1070 | if (tbf) |
| 1071 | tbf_free(tbf); |
| 1072 | tbf = pdch->dl_tbf_by_tfi(tfi); |
| 1073 | if (tbf) |
| 1074 | tbf_free(tbf); |
| 1075 | } |
| 1076 | } |
Pau Espin Pedrol | e91c4c7 | 2021-01-18 17:54:30 +0100 | [diff] [blame] | 1077 | |
| 1078 | void pdch_disable(struct gprs_rlcmac_pdch *pdch) { |
| 1079 | pdch->disable(); |
| 1080 | } |