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 | c6571b5 | 2021-05-10 17:10:37 +0200 | [diff] [blame] | 122 | gprs_rlcmac_ul_tbf *ul_tbf = tbf_alloc_ul_pacch(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"); |
Pau Espin Pedrol | 6ad11a6 | 2021-07-27 12:27:08 +0200 | [diff] [blame] | 127 | osmo_fsm_inst_dispatch(tbf->ul_ass_fsm.fi, TBF_UL_ASS_EV_SCHED_ASS, NULL); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 128 | } else { |
| 129 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF in ack message, so we packet access reject:\n"); |
Pau Espin Pedrol | 6ad11a6 | 2021-07-27 12:27:08 +0200 | [diff] [blame] | 130 | osmo_fsm_inst_dispatch(tbf->ul_ass_fsm.fi, TBF_UL_ASS_EV_SCHED_ASS_REJ, NULL); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 131 | } |
| 132 | } |
| 133 | |
Pau Espin Pedrol | 702ebee | 2021-03-08 14:15:54 +0100 | [diff] [blame] | 134 | void pdch_init(struct gprs_rlcmac_pdch *pdch, struct gprs_rlcmac_trx *trx, uint8_t ts_nr) |
| 135 | { |
| 136 | pdch->ts_no = ts_nr; |
| 137 | pdch->trx = trx; |
| 138 | |
| 139 | /* Initialize the PTCCH/D message (Packet Timing Advance Control Channel) */ |
| 140 | memset(pdch->ptcch_msg, PTCCH_TAI_FREE, PTCCH_TAI_NUM); |
| 141 | memset(pdch->ptcch_msg + PTCCH_TAI_NUM, PTCCH_PADDING, 7); |
| 142 | } |
| 143 | |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 144 | void gprs_rlcmac_pdch::enable() |
| 145 | { |
Pau Espin Pedrol | 4f67a9b | 2021-06-30 16:03:06 +0200 | [diff] [blame] | 146 | OSMO_ASSERT(m_is_enabled == 0); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 147 | INIT_LLIST_HEAD(&paging_list); |
Pau Espin Pedrol | 4f67a9b | 2021-06-30 16:03:06 +0200 | [diff] [blame] | 148 | |
| 149 | OSMO_ASSERT(!this->ulc); |
| 150 | this->ulc = pdch_ulc_alloc(this, trx->bts); |
| 151 | |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 152 | m_is_enabled = 1; |
Oliver Smith | 35d51ca | 2021-09-02 12:23:58 +0200 | [diff] [blame] | 153 | bts_stat_item_inc(trx->bts, STAT_PDCH_AVAILABLE); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 154 | } |
| 155 | |
| 156 | void gprs_rlcmac_pdch::disable() |
| 157 | { |
Pau Espin Pedrol | 4f67a9b | 2021-06-30 16:03:06 +0200 | [diff] [blame] | 158 | OSMO_ASSERT(m_is_enabled == 1); |
| 159 | this->free_resources(); |
| 160 | |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 161 | m_is_enabled = 0; |
Oliver Smith | 35d51ca | 2021-09-02 12:23:58 +0200 | [diff] [blame] | 162 | bts_stat_item_dec(trx->bts, STAT_PDCH_AVAILABLE); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 163 | } |
| 164 | |
| 165 | void gprs_rlcmac_pdch::free_resources() |
| 166 | { |
| 167 | struct gprs_rlcmac_paging *pag; |
| 168 | |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 169 | /* kick all TBF on slot */ |
Pau Espin Pedrol | 906aafc | 2021-01-18 17:53:29 +0100 | [diff] [blame] | 170 | pdch_free_all_tbf(this); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 171 | |
| 172 | /* flush all pending paging messages */ |
| 173 | while ((pag = dequeue_paging())) |
| 174 | talloc_free(pag); |
| 175 | |
Pau Espin Pedrol | 15c58ac | 2021-03-08 14:57:58 +0100 | [diff] [blame] | 176 | talloc_free(this->ulc); |
Pau Espin Pedrol | 4f67a9b | 2021-06-30 16:03:06 +0200 | [diff] [blame] | 177 | this->ulc = NULL; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 178 | } |
| 179 | |
| 180 | struct gprs_rlcmac_paging *gprs_rlcmac_pdch::dequeue_paging() |
| 181 | { |
| 182 | struct gprs_rlcmac_paging *pag; |
| 183 | |
| 184 | if (llist_empty(&paging_list)) |
| 185 | return NULL; |
Pau Espin Pedrol | c48d27b | 2021-05-13 15:58:55 +0200 | [diff] [blame] | 186 | pag = llist_first_entry(&paging_list, struct gprs_rlcmac_paging, list); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 187 | llist_del(&pag->list); |
| 188 | |
| 189 | return pag; |
| 190 | } |
| 191 | |
| 192 | struct msgb *gprs_rlcmac_pdch::packet_paging_request() |
| 193 | { |
| 194 | struct gprs_rlcmac_paging *pag; |
Pau Espin Pedrol | 5e300ce | 2020-02-03 17:18:03 +0100 | [diff] [blame] | 195 | RlcMacDownlink_t *mac_control_block; |
| 196 | bitvec *pag_vec; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 197 | struct msgb *msg; |
| 198 | unsigned wp = 0, len; |
Pau Espin Pedrol | 5e300ce | 2020-02-03 17:18:03 +0100 | [diff] [blame] | 199 | int rc; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 200 | |
| 201 | /* no paging, no message */ |
| 202 | pag = dequeue_paging(); |
| 203 | if (!pag) |
| 204 | return NULL; |
| 205 | |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 206 | LOGPDCH(this, DRLCMAC, LOGL_DEBUG, "Scheduling paging\n"); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 207 | |
| 208 | /* alloc message */ |
| 209 | msg = msgb_alloc(23, "pag ctrl block"); |
| 210 | if (!msg) { |
| 211 | talloc_free(pag); |
| 212 | return NULL; |
| 213 | } |
Pau Espin Pedrol | 5e300ce | 2020-02-03 17:18:03 +0100 | [diff] [blame] | 214 | pag_vec = bitvec_alloc(23, tall_pcu_ctx); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 215 | if (!pag_vec) { |
| 216 | msgb_free(msg); |
| 217 | talloc_free(pag); |
| 218 | return NULL; |
| 219 | } |
| 220 | wp = Encoding::write_packet_paging_request(pag_vec); |
| 221 | |
| 222 | /* loop until message is full */ |
| 223 | while (pag) { |
Neels Hofmeyr | 0052051 | 2020-08-21 15:44:58 +0200 | [diff] [blame] | 224 | if (log_check_level(DRLCMAC, LOGL_DEBUG)) { |
| 225 | struct osmo_mobile_identity omi = {}; |
| 226 | char str[64]; |
| 227 | osmo_mobile_identity_decode(&omi, pag->identity_lv + 1, pag->identity_lv[0], true); |
| 228 | osmo_mobile_identity_to_str_buf(str, sizeof(str), &omi); |
| 229 | LOGP(DRLCMAC, LOGL_DEBUG, "Paging MI - %s\n", str); |
| 230 | } |
Vadim Yanitskiy | d71c566 | 2020-03-26 15:45:21 +0700 | [diff] [blame] | 231 | |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 232 | /* try to add paging */ |
Vadim Yanitskiy | ce16014 | 2020-03-26 16:18:17 +0700 | [diff] [blame] | 233 | if ((pag->identity_lv[1] & GSM_MI_TYPE_MASK) == GSM_MI_TYPE_TMSI) { |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 234 | /* TMSI */ |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 235 | len = 1 + 1 + 1 + 32 + 2 + 1; |
| 236 | if (pag->identity_lv[0] != 5) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 237 | LOGPDCH(this, DRLCMAC, LOGL_ERROR, |
| 238 | "TMSI paging with MI != 5 octets!\n"); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 239 | goto continue_next; |
| 240 | } |
| 241 | } else { |
| 242 | /* MI */ |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 243 | len = 1 + 1 + 1 + 4 + (pag->identity_lv[0]<<3) + 2 + 1; |
| 244 | if (pag->identity_lv[0] > 8) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 245 | LOGPDCH(this, DRLCMAC, LOGL_ERROR, |
| 246 | "Paging with MI > 8 octets!\n"); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 247 | goto continue_next; |
| 248 | } |
| 249 | } |
| 250 | if (wp + len > 184) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 251 | LOGPDCH(this, DRLCMAC, LOGL_DEBUG, |
| 252 | "- Does not fit, so schedule next time\n"); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 253 | /* put back paging record, because does not fit */ |
Pau Espin Pedrol | 7d3ee9e | 2020-11-23 16:04:02 +0100 | [diff] [blame] | 254 | llist_add(&pag->list, &paging_list); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 255 | break; |
| 256 | } |
| 257 | Encoding::write_repeated_page_info(pag_vec, wp, pag->identity_lv[0], |
| 258 | pag->identity_lv + 1, pag->chan_needed); |
| 259 | |
| 260 | continue_next: |
| 261 | talloc_free(pag); |
| 262 | pag = dequeue_paging(); |
| 263 | } |
| 264 | |
| 265 | bitvec_pack(pag_vec, msgb_put(msg, 23)); |
Pau Espin Pedrol | 5e300ce | 2020-02-03 17:18:03 +0100 | [diff] [blame] | 266 | 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] | 267 | LOGPDCH(this, DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ TX : Packet Paging Request +++++++++++++++++++++++++\n"); |
Pau Espin Pedrol | 5e300ce | 2020-02-03 17:18:03 +0100 | [diff] [blame] | 268 | rc = decode_gsm_rlcmac_downlink(pag_vec, mac_control_block); |
| 269 | if (rc < 0) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 270 | 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] | 271 | rc, osmo_hexdump(msgb_data(msg), msgb_length(msg))); |
Pau Espin Pedrol | 5e300ce | 2020-02-03 17:18:03 +0100 | [diff] [blame] | 272 | goto free_ret; |
| 273 | } |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 274 | LOGPDCH(this, DRLCMAC, LOGL_DEBUG, "------------------------- TX : Packet Paging Request -------------------------\n"); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 275 | bitvec_free(pag_vec); |
| 276 | talloc_free(mac_control_block); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 277 | return msg; |
Pau Espin Pedrol | 5e300ce | 2020-02-03 17:18:03 +0100 | [diff] [blame] | 278 | |
| 279 | free_ret: |
| 280 | bitvec_free(pag_vec); |
| 281 | talloc_free(mac_control_block); |
| 282 | msgb_free(msg); |
| 283 | return NULL; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 284 | } |
| 285 | |
Neels Hofmeyr | 59fc0bd | 2020-08-21 16:21:23 +0200 | [diff] [blame] | 286 | 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] | 287 | { |
Neels Hofmeyr | 59fc0bd | 2020-08-21 16:21:23 +0200 | [diff] [blame] | 288 | int rc; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 289 | struct gprs_rlcmac_paging *pag = talloc_zero(tall_pcu_ctx, struct gprs_rlcmac_paging); |
| 290 | if (!pag) |
| 291 | return false; |
| 292 | |
| 293 | pag->chan_needed = chan_needed; |
Neels Hofmeyr | 59fc0bd | 2020-08-21 16:21:23 +0200 | [diff] [blame] | 294 | rc = osmo_mobile_identity_encode_buf(pag->identity_lv + 1, sizeof(pag->identity_lv) - 1, mi, true); |
| 295 | if (rc <= 0) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 296 | 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] | 297 | talloc_free(pag); |
| 298 | return false; |
| 299 | } |
| 300 | pag->identity_lv[0] = rc; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 301 | |
| 302 | llist_add(&pag->list, &paging_list); |
| 303 | |
| 304 | return true; |
| 305 | } |
| 306 | |
| 307 | void gprs_rlcmac_pdch::rcv_control_ack(Packet_Control_Acknowledgement_t *packet, uint32_t fn) |
| 308 | { |
| 309 | struct gprs_rlcmac_tbf *tbf, *new_tbf; |
| 310 | uint32_t tlli = packet->TLLI; |
Pau Espin Pedrol | ab17890 | 2021-06-22 22:15:20 +0200 | [diff] [blame] | 311 | GprsMs *ms; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 312 | gprs_rlcmac_ul_tbf *ul_tbf; |
Pau Espin Pedrol | 86580e1 | 2021-03-29 18:15:30 +0200 | [diff] [blame] | 313 | enum pdch_ulc_tbf_poll_reason reason; |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 314 | struct pdch_ulc_node *poll; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 315 | |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 316 | poll = pdch_ulc_get_node(ulc, fn); |
| 317 | if (!poll || poll->type !=PDCH_ULC_NODE_TBF_POLL || !poll->tbf_poll.poll_tbf) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 318 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, "PACKET CONTROL ACK with " |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 319 | "unknown FN=%u TLLI=0x%08x (TRX %d TS %d)\n", |
| 320 | fn, tlli, trx_no(), ts_no); |
Pau Espin Pedrol | ab17890 | 2021-06-22 22:15:20 +0200 | [diff] [blame] | 321 | ms = bts_ms_by_tlli(bts(), tlli, GSM_RESERVED_TMSI); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 322 | if (ms) |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 323 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, "PACKET CONTROL ACK with " |
| 324 | "unknown TBF corresponds to MS with IMSI %s, TA %d, " |
| 325 | "uTBF (TFI=%d, state=%s), dTBF (TFI=%d, state=%s)\n", |
| 326 | ms_imsi(ms), ms_ta(ms), |
| 327 | ms_ul_tbf(ms) ? ms_ul_tbf(ms)->tfi() : 0, |
| 328 | ms_ul_tbf(ms) ? ms_ul_tbf(ms)->state_name() : "None", |
| 329 | ms_dl_tbf(ms) ? ms_dl_tbf(ms)->tfi() : 0, |
| 330 | ms_dl_tbf(ms) ? ms_dl_tbf(ms)->state_name() : "None"); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 331 | return; |
| 332 | } |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 333 | tbf = poll->tbf_poll.poll_tbf; |
Pau Espin Pedrol | 86580e1 | 2021-03-29 18:15:30 +0200 | [diff] [blame] | 334 | reason = poll->tbf_poll.reason; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 335 | |
| 336 | /* Reset N3101 counter: */ |
Max | 847ed9f | 2018-02-20 18:16:11 +0100 | [diff] [blame] | 337 | tbf->n_reset(N3101); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 338 | |
| 339 | tbf->update_ms(tlli, GPRS_RLCMAC_UL_TBF); |
Pau Espin Pedrol | ab17890 | 2021-06-22 22:15:20 +0200 | [diff] [blame] | 340 | /* Gather MS from TBF, since it may be NULL or may have been merged during update_ms */ |
| 341 | ms = tbf->ms(); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 342 | |
Pau Espin Pedrol | c6e911c | 2021-06-07 18:13:23 +0200 | [diff] [blame] | 343 | LOGPTBF(tbf, LOGL_DEBUG, "FN=%" PRIu32 " Rx Packet Control Ack (reason=%s)\n", |
| 344 | fn, get_value_string(pdch_ulc_tbf_poll_reason_names, reason)); |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 345 | pdch_ulc_release_fn(ulc, fn); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 346 | |
| 347 | /* check if this control ack belongs to packet uplink ack */ |
| 348 | ul_tbf = as_ul_tbf(tbf); |
Pau Espin Pedrol | ea8dbdd | 2021-07-29 18:39:16 +0200 | [diff] [blame] | 349 | if (ul_tbf && reason == PDCH_ULC_POLL_UL_ACK && tbf_ul_ack_exp_ctrl_ack(ul_tbf, fn, ts_no)) { |
| 350 | osmo_fsm_inst_dispatch(ul_tbf->ul_ack_fsm.fi, TBF_UL_ACK_EV_RX_CTRL_ACK, NULL); |
| 351 | /* We can free since we only set polling on final UL ACK/NACK */ |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 352 | LOGPTBF(tbf, LOGL_DEBUG, "[UPLINK] END\n"); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 353 | tbf_free(tbf); |
| 354 | return; |
| 355 | } |
Pau Espin Pedrol | 49a2f40 | 2021-07-27 17:33:07 +0200 | [diff] [blame] | 356 | if (tbf->dl_ass_state_is(TBF_DL_ASS_WAIT_ACK)) { |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 357 | LOGPTBF(tbf, LOGL_DEBUG, "[UPLINK] DOWNLINK ASSIGNED\n"); |
| 358 | /* reset N3105 */ |
Max | 847ed9f | 2018-02-20 18:16:11 +0100 | [diff] [blame] | 359 | tbf->n_reset(N3105); |
Pau Espin Pedrol | 49a2f40 | 2021-07-27 17:33:07 +0200 | [diff] [blame] | 360 | osmo_fsm_inst_dispatch(tbf->dl_ass_fsm.fi, TBF_DL_ASS_EV_RX_ASS_CTRL_ACK, NULL); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 361 | |
Pau Espin Pedrol | ab17890 | 2021-06-22 22:15:20 +0200 | [diff] [blame] | 362 | new_tbf = ms_dl_tbf(ms); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 363 | if (!new_tbf) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 364 | LOGPDCH(this, DRLCMAC, LOGL_ERROR, "Got ACK, but DL " |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 365 | "TBF is gone TLLI=0x%08x\n", tlli); |
| 366 | return; |
| 367 | } |
Pau Espin Pedrol | dc2aaac | 2021-05-14 12:50:46 +0200 | [diff] [blame] | 368 | if (tbf->state_is(TBF_ST_WAIT_RELEASE) && |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 369 | tbf->direction == new_tbf->direction) |
| 370 | tbf_free(tbf); |
| 371 | |
Pau Espin Pedrol | 720e19e | 2021-07-22 19:56:37 +0200 | [diff] [blame] | 372 | osmo_fsm_inst_dispatch(new_tbf->state_fsm.fi, TBF_EV_ASSIGN_ACK_PACCH, NULL); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 373 | |
| 374 | tbf_assign_control_ts(new_tbf); |
| 375 | return; |
| 376 | } |
Pau Espin Pedrol | 6ad11a6 | 2021-07-27 12:27:08 +0200 | [diff] [blame] | 377 | if (tbf->ul_ass_state_is(TBF_UL_ASS_WAIT_ACK)) { |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 378 | LOGPTBF(tbf, LOGL_DEBUG, "[DOWNLINK] UPLINK ASSIGNED\n"); |
| 379 | /* reset N3105 */ |
Max | 847ed9f | 2018-02-20 18:16:11 +0100 | [diff] [blame] | 380 | tbf->n_reset(N3105); |
Pau Espin Pedrol | 6ad11a6 | 2021-07-27 12:27:08 +0200 | [diff] [blame] | 381 | osmo_fsm_inst_dispatch(tbf->ul_ass_fsm.fi, TBF_UL_ASS_EV_RX_ASS_CTRL_ACK, NULL); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 382 | |
Pau Espin Pedrol | ab17890 | 2021-06-22 22:15:20 +0200 | [diff] [blame] | 383 | new_tbf = ms_ul_tbf(ms); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 384 | if (!new_tbf) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 385 | LOGPDCH(this, DRLCMAC, LOGL_ERROR, "Got ACK, but UL " |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 386 | "TBF is gone TLLI=0x%08x\n", tlli); |
| 387 | return; |
| 388 | } |
Pau Espin Pedrol | dc2aaac | 2021-05-14 12:50:46 +0200 | [diff] [blame] | 389 | if (tbf->state_is(TBF_ST_WAIT_RELEASE) && |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 390 | tbf->direction == new_tbf->direction) |
| 391 | tbf_free(tbf); |
| 392 | |
Pau Espin Pedrol | 720e19e | 2021-07-22 19:56:37 +0200 | [diff] [blame] | 393 | osmo_fsm_inst_dispatch(new_tbf->state_fsm.fi, TBF_EV_ASSIGN_ACK_PACCH, NULL); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 394 | |
| 395 | tbf_assign_control_ts(new_tbf); |
| 396 | /* there might be LLC packets waiting in the queue, but the DL |
| 397 | * TBF might have been released while the UL TBF has been |
| 398 | * established */ |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 399 | if (ms_need_dl_tbf(new_tbf->ms())) |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 400 | new_tbf->establish_dl_tbf_on_pacch(); |
| 401 | |
| 402 | return; |
| 403 | } |
Pau Espin Pedrol | 952cb3d | 2021-02-01 14:52:48 +0100 | [diff] [blame] | 404 | if (ms->nacc && ms->nacc->fi->state == NACC_ST_WAIT_CELL_CHG_CONTINUE_ACK && |
| 405 | ms->nacc->continue_poll_fn == fn && ms->nacc->continue_poll_ts == ts_no) { |
| 406 | osmo_fsm_inst_dispatch(ms->nacc->fi, NACC_EV_RX_CELL_CHG_CONTINUE_ACK, NULL); |
| 407 | /* Don't assume MS is no longer reachable (hence don't free) after this: TS 44.060 |
| 408 | * "When the mobile station receives the PACKET CELL CHANGE ORDER |
| 409 | * or the PACKET CELL CHANGE CONTINUE message the mobile station |
| 410 | * shall transmit a PACKET CONTROL ACKNOWLEDGMENT message in the |
| 411 | * specified uplink radio block if a valid RRBP field is |
| 412 | * received as part of the message; the mobile station _MAY_ then |
| 413 | * switch to a new cell." |
| 414 | */ |
| 415 | return; |
| 416 | } |
Pau Espin Pedrol | c6e911c | 2021-06-07 18:13:23 +0200 | [diff] [blame] | 417 | LOGPDCH(this, DRLCMAC, LOGL_ERROR, "FN=%" PRIu32 " " |
| 418 | "Error: received PACKET CONTROL ACK at no request (reason=%s)\n", fn, |
| 419 | get_value_string(pdch_ulc_tbf_poll_reason_names, reason)); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 420 | } |
| 421 | |
Pau Espin Pedrol | e13cdc5 | 2019-09-25 13:46:14 +0200 | [diff] [blame] | 422 | 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] | 423 | { |
| 424 | int8_t tfi = 0; /* must be signed */ |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 425 | struct pdch_ulc_node *poll; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 426 | struct gprs_rlcmac_dl_tbf *tbf; |
| 427 | int rc; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 428 | int num_blocks; |
| 429 | uint8_t bits_data[RLC_GPRS_WS/8]; |
| 430 | bitvec bits; |
| 431 | int bsn_begin, bsn_end; |
| 432 | char show_bits[RLC_GPRS_WS + 1]; |
| 433 | |
| 434 | tfi = ack_nack->DOWNLINK_TFI; |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 435 | poll = pdch_ulc_get_node(ulc, fn); |
| 436 | if (!poll || poll->type != PDCH_ULC_NODE_TBF_POLL) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 437 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, "PACKET DOWNLINK ACK with " |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 438 | "unknown FN=%u TFI=%d (TRX %d TS %d)\n", |
| 439 | fn, tfi, trx_no(), ts_no); |
| 440 | return; |
| 441 | } |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 442 | tbf = as_dl_tbf(poll->tbf_poll.poll_tbf); |
Pau Espin Pedrol | b5fece9 | 2021-08-23 16:58:04 +0200 | [diff] [blame] | 443 | if (tbf->tfi() != tfi) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 444 | LOGPTBFDL(tbf, LOGL_NOTICE, |
| 445 | "PACKET DOWNLINK ACK with wrong TFI=%d, ignoring!\n", tfi); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 446 | return; |
| 447 | } |
| 448 | |
| 449 | /* Reset N3101 counter: */ |
Max | 847ed9f | 2018-02-20 18:16:11 +0100 | [diff] [blame] | 450 | tbf->n_reset(N3101); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 451 | |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 452 | pdch_ulc_release_fn(ulc, fn); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 453 | |
| 454 | LOGPTBF(tbf, LOGL_DEBUG, "RX: [PCU <- BTS] Packet Downlink Ack/Nack\n"); |
| 455 | |
| 456 | bits.data = bits_data; |
| 457 | bits.data_len = sizeof(bits_data); |
| 458 | bits.cur_bit = 0; |
| 459 | |
| 460 | num_blocks = Decoding::decode_gprs_acknack_bits( |
| 461 | &ack_nack->Ack_Nack_Description, &bits, |
Pau Espin Pedrol | b3f2397 | 2020-10-23 21:00:23 +0200 | [diff] [blame] | 462 | &bsn_begin, &bsn_end, static_cast<gprs_rlc_dl_window *>(tbf->window())); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 463 | |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 464 | LOGPDCH(this, DRLCMAC, LOGL_DEBUG, |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 465 | "Got GPRS DL ACK bitmap: SSN: %d, BSN %d to %d - 1 (%d blocks), " |
| 466 | "\"%s\"\n", |
| 467 | ack_nack->Ack_Nack_Description.STARTING_SEQUENCE_NUMBER, |
| 468 | bsn_begin, bsn_end, num_blocks, |
| 469 | (Decoding::extract_rbb(&bits, show_bits), show_bits)); |
| 470 | |
| 471 | rc = tbf->rcvd_dl_ack( |
| 472 | ack_nack->Ack_Nack_Description.FINAL_ACK_INDICATION, |
| 473 | bsn_begin, &bits); |
| 474 | if (rc == 1) { |
| 475 | tbf_free(tbf); |
| 476 | return; |
| 477 | } |
| 478 | /* check for channel request */ |
| 479 | if (ack_nack->Exist_Channel_Request_Description) |
Pau Espin Pedrol | 0ece97d | 2021-01-18 12:53:54 +0100 | [diff] [blame] | 480 | sched_ul_ass_or_rej(bts(), tbf); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 481 | |
| 482 | /* get measurements */ |
| 483 | if (tbf->ms()) { |
Pau Espin Pedrol | e13cdc5 | 2019-09-25 13:46:14 +0200 | [diff] [blame] | 484 | get_meas(meas, &ack_nack->Channel_Quality_Report); |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 485 | ms_update_l1_meas(tbf->ms(), meas); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 486 | } |
| 487 | } |
| 488 | |
Pau Espin Pedrol | e13cdc5 | 2019-09-25 13:46:14 +0200 | [diff] [blame] | 489 | 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] | 490 | { |
| 491 | int8_t tfi = 0; /* must be signed */ |
| 492 | struct gprs_rlcmac_dl_tbf *tbf; |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 493 | struct pdch_ulc_node *poll; |
Pau Espin Pedrol | b3f2397 | 2020-10-23 21:00:23 +0200 | [diff] [blame] | 494 | gprs_rlc_dl_window *window; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 495 | int rc; |
| 496 | int num_blocks; |
| 497 | uint8_t bits_data[RLC_EGPRS_MAX_WS/8]; |
| 498 | char show_bits[RLC_EGPRS_MAX_WS + 1]; |
| 499 | bitvec bits; |
| 500 | int bsn_begin, bsn_end; |
| 501 | |
| 502 | tfi = ack_nack->DOWNLINK_TFI; |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 503 | poll = pdch_ulc_get_node(ulc, fn); |
| 504 | if (!poll || poll->type !=PDCH_ULC_NODE_TBF_POLL) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 505 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, "EGPRS PACKET DOWNLINK ACK with " |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 506 | "unknown FN=%u TFI=%d (TRX %d TS %d)\n", |
| 507 | fn, tfi, trx_no(), ts_no); |
| 508 | return; |
| 509 | } |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 510 | tbf = as_dl_tbf(poll->tbf_poll.poll_tbf); |
Pau Espin Pedrol | b5fece9 | 2021-08-23 16:58:04 +0200 | [diff] [blame] | 511 | if (tbf->tfi() != tfi) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 512 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, "EGPRS PACKET DOWNLINK ACK with " |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 513 | "wrong TFI=%d, ignoring!\n", tfi); |
| 514 | return; |
| 515 | } |
| 516 | |
| 517 | /* Reset N3101 counter: */ |
Max | 847ed9f | 2018-02-20 18:16:11 +0100 | [diff] [blame] | 518 | tbf->n_reset(N3101); |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 519 | pdch_ulc_release_fn(ulc, fn); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 520 | |
| 521 | LOGPTBF(tbf, LOGL_DEBUG, |
| 522 | "RX: [PCU <- BTS] EGPRS Packet Downlink Ack/Nack\n"); |
| 523 | |
Pau Espin Pedrol | b3f2397 | 2020-10-23 21:00:23 +0200 | [diff] [blame] | 524 | window = static_cast<gprs_rlc_dl_window *>(tbf->window()); |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 525 | LOGPDCH(this, DRLCMAC, LOGL_DEBUG, "EGPRS ACK/NACK: " |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 526 | "ut: %d, final: %d, bow: %d, eow: %d, ssn: %d, have_crbb: %d, " |
| 527 | "urbb_len:%d, %p, %p, %d, %d, win: %d-%d, urbb: %s\n", |
| 528 | (int)ack_nack->EGPRS_AckNack.UnionType, |
| 529 | (int)ack_nack->EGPRS_AckNack.Desc.FINAL_ACK_INDICATION, |
| 530 | (int)ack_nack->EGPRS_AckNack.Desc.BEGINNING_OF_WINDOW, |
| 531 | (int)ack_nack->EGPRS_AckNack.Desc.END_OF_WINDOW, |
| 532 | (int)ack_nack->EGPRS_AckNack.Desc.STARTING_SEQUENCE_NUMBER, |
| 533 | (int)ack_nack->EGPRS_AckNack.Desc.Exist_CRBB, |
| 534 | (int)ack_nack->EGPRS_AckNack.Desc.URBB_LENGTH, |
| 535 | (void *)&ack_nack->EGPRS_AckNack.UnionType, |
| 536 | (void *)&ack_nack->EGPRS_AckNack.Desc, |
| 537 | (int)offsetof(EGPRS_AckNack_t, Desc), |
| 538 | (int)offsetof(EGPRS_AckNack_w_len_t, Desc), |
Pau Espin Pedrol | b3f2397 | 2020-10-23 21:00:23 +0200 | [diff] [blame] | 539 | window->v_a(), |
| 540 | window->v_s(), |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 541 | osmo_hexdump((const uint8_t *)&ack_nack->EGPRS_AckNack.Desc.URBB, |
| 542 | sizeof(ack_nack->EGPRS_AckNack.Desc.URBB))); |
| 543 | |
| 544 | bits.data = bits_data; |
| 545 | bits.data_len = sizeof(bits_data); |
| 546 | bits.cur_bit = 0; |
| 547 | |
| 548 | num_blocks = Decoding::decode_egprs_acknack_bits( |
| 549 | &ack_nack->EGPRS_AckNack.Desc, &bits, |
Pau Espin Pedrol | b3f2397 | 2020-10-23 21:00:23 +0200 | [diff] [blame] | 550 | &bsn_begin, &bsn_end, window); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 551 | |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 552 | LOGPDCH(this, DRLCMAC, LOGL_DEBUG, |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 553 | "Got EGPRS DL ACK bitmap: SSN: %d, BSN %d to %d - 1 (%d blocks), " |
| 554 | "\"%s\"\n", |
| 555 | ack_nack->EGPRS_AckNack.Desc.STARTING_SEQUENCE_NUMBER, |
| 556 | bsn_begin, bsn_end, num_blocks, |
| 557 | (Decoding::extract_rbb(&bits, show_bits), show_bits) |
| 558 | ); |
| 559 | |
| 560 | rc = tbf->rcvd_dl_ack( |
| 561 | ack_nack->EGPRS_AckNack.Desc.FINAL_ACK_INDICATION, |
| 562 | bsn_begin, &bits); |
| 563 | if (rc == 1) { |
| 564 | tbf_free(tbf); |
| 565 | return; |
| 566 | } |
| 567 | |
| 568 | /* check for channel request */ |
| 569 | if (ack_nack->Exist_ChannelRequestDescription) |
Pau Espin Pedrol | 0ece97d | 2021-01-18 12:53:54 +0100 | [diff] [blame] | 570 | sched_ul_ass_or_rej(bts(), tbf); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 571 | |
| 572 | /* get measurements */ |
| 573 | if (tbf->ms()) { |
| 574 | /* TODO: Implement Measurements parsing for EGPRS */ |
| 575 | /* |
Pau Espin Pedrol | e13cdc5 | 2019-09-25 13:46:14 +0200 | [diff] [blame] | 576 | get_meas(meas, &ack_nack->Channel_Quality_Report); |
| 577 | tbf->ms()->update_l1_meas(meas); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 578 | */ |
| 579 | } |
| 580 | } |
| 581 | |
Pau Espin Pedrol | e13cdc5 | 2019-09-25 13:46:14 +0200 | [diff] [blame] | 582 | 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] | 583 | { |
| 584 | struct gprs_rlcmac_sba *sba; |
| 585 | |
| 586 | if (request->ID.UnionType) { |
Pau Espin Pedrol | 4347997 | 2021-04-22 19:18:13 +0200 | [diff] [blame] | 587 | struct gprs_rlcmac_ul_tbf *ul_tbf = NULL; |
| 588 | struct pdch_ulc_node *item; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 589 | uint32_t tlli = request->ID.u.TLLI; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 590 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 591 | GprsMs *ms = bts_ms_by_tlli(bts(), tlli, GSM_RESERVED_TMSI); |
Pau Espin Pedrol | ce60011 | 2020-05-12 19:20:10 +0200 | [diff] [blame] | 592 | if (!ms) { |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 593 | ms = bts_alloc_ms(bts(), 0, 0); /* ms class updated later */ |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 594 | ms_set_tlli(ms, tlli); |
Pau Espin Pedrol | ce60011 | 2020-05-12 19:20:10 +0200 | [diff] [blame] | 595 | } |
Pau Espin Pedrol | 17402a5 | 2020-05-08 17:44:33 +0200 | [diff] [blame] | 596 | |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 597 | /* Keep the ms, even if it gets idle temporarily */ |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 598 | ms_ref(ms); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 599 | |
Pau Espin Pedrol | 4347997 | 2021-04-22 19:18:13 +0200 | [diff] [blame] | 600 | if (!(item = pdch_ulc_get_node(ulc, fn))) { |
| 601 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, "FN=%u PKT RESOURCE REQ: " |
| 602 | "UL block not reserved\n", fn); |
| 603 | goto return_unref; |
| 604 | } |
| 605 | |
| 606 | switch (item->type) { |
| 607 | case PDCH_ULC_NODE_SBA: |
| 608 | sba = item->sba.sba; |
| 609 | LOGPDCH(this, DRLCMAC, LOGL_DEBUG, "FN=%u PKT RESOURCE REQ: " |
| 610 | "MS requests UL TBF throguh SBA\n", fn); |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 611 | ms_set_ta(ms, sba->ta); |
Pau Espin Pedrol | 15c58ac | 2021-03-08 14:57:58 +0100 | [diff] [blame] | 612 | sba_free(sba); |
Pau Espin Pedrol | 4347997 | 2021-04-22 19:18:13 +0200 | [diff] [blame] | 613 | break; |
| 614 | case PDCH_ULC_NODE_TBF_POLL: |
| 615 | if (item->tbf_poll.poll_tbf->direction != GPRS_RLCMAC_UL_TBF) { |
| 616 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, "FN=%u PKT RESOURCE REQ: " |
| 617 | "Unexpectedly received for DL TBF %s\n", fn, |
| 618 | tbf_name(item->tbf_poll.poll_tbf)); |
| 619 | /* let common path expire the poll */ |
| 620 | goto return_unref; |
| 621 | } |
| 622 | ul_tbf = (struct gprs_rlcmac_ul_tbf *)item->tbf_poll.poll_tbf; |
| 623 | if (item->tbf_poll.reason != PDCH_ULC_POLL_UL_ACK) { |
| 624 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, "FN=%u PKT RESOURCE REQ: " |
| 625 | "Unexpectedly received, waiting for poll reason %d\n", |
| 626 | fn, item->tbf_poll.reason); |
| 627 | /* let common path expire the poll */ |
| 628 | goto return_unref; |
| 629 | } |
| 630 | if (ul_tbf != ms_ul_tbf(ms)) { |
| 631 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, "FN=%u PKT RESOURCE REQ: " |
| 632 | "Unexpected TLLI 0x%08x received vs exp 0x%08x\n", |
| 633 | fn, tlli, ul_tbf->tlli()); |
| 634 | /* let common path expire the poll */ |
| 635 | goto return_unref; |
| 636 | } |
| 637 | /* 3GPP TS 44.060 $ 9.3.3.3 */ |
| 638 | LOGPTBFUL(ul_tbf, LOGL_DEBUG, "FN=%u PKT RESOURCE REQ: " |
| 639 | "MS requests reuse of finished UL TBF in RRBP " |
| 640 | "block of final UL ACK/NACK\n", fn); |
| 641 | ul_tbf->n_reset(N3103); |
| 642 | pdch_ulc_release_node(ulc, item); |
| 643 | break; |
| 644 | case PDCH_ULC_NODE_TBF_USF: |
| 645 | /* Is it actually valid for an MS to send a PKT Res Req during USF? */ |
| 646 | ul_tbf = item->tbf_usf.ul_tbf; |
| 647 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, "FN=%u PKT RESOURCE REQ: " |
| 648 | "Unexpectedly received, waiting USF of %s\n", |
| 649 | fn, tbf_name(item->tbf_usf.ul_tbf)); |
| 650 | pdch_ulc_release_node(ulc, item); |
| 651 | break; |
| 652 | default: |
| 653 | OSMO_ASSERT(0); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 654 | } |
Pau Espin Pedrol | 4347997 | 2021-04-22 19:18:13 +0200 | [diff] [blame] | 655 | |
| 656 | /* here ul_tbf may be NULL in SBA case (no previous TBF) */ |
Pau Espin Pedrol | 9e7361a | 2020-07-08 17:35:12 +0200 | [diff] [blame] | 657 | |
Pau Espin Pedrol | e50ce6e | 2020-03-23 18:49:16 +0100 | [diff] [blame] | 658 | if (request->Exist_MS_Radio_Access_capability2) { |
Pau Espin Pedrol | 17402a5 | 2020-05-08 17:44:33 +0200 | [diff] [blame] | 659 | uint8_t ms_class, egprs_ms_class; |
Pau Espin Pedrol | 8a35e64 | 2021-01-18 17:14:14 +0100 | [diff] [blame] | 660 | ms_class = get_ms_class_by_capability(&request->MS_Radio_Access_capability2); |
| 661 | 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] | 662 | if (ms_class) |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 663 | ms_set_ms_class(ms, ms_class); |
Pau Espin Pedrol | bcb226d | 2020-07-08 17:18:22 +0200 | [diff] [blame] | 664 | if (egprs_ms_class) |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 665 | ms_set_egprs_ms_class(ms, egprs_ms_class); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 666 | } |
Pau Espin Pedrol | 17402a5 | 2020-05-08 17:44:33 +0200 | [diff] [blame] | 667 | |
Pau Espin Pedrol | 9e7361a | 2020-07-08 17:35:12 +0200 | [diff] [blame] | 668 | /* Get rid of previous finished UL TBF before providing a new one */ |
Pau Espin Pedrol | 4347997 | 2021-04-22 19:18:13 +0200 | [diff] [blame] | 669 | if (ul_tbf) { |
Pau Espin Pedrol | dc2aaac | 2021-05-14 12:50:46 +0200 | [diff] [blame] | 670 | if (!ul_tbf->state_is(TBF_ST_FINISHED)) |
Pau Espin Pedrol | 9e7361a | 2020-07-08 17:35:12 +0200 | [diff] [blame] | 671 | LOGPTBFUL(ul_tbf, LOGL_NOTICE, |
| 672 | "Got PACKET RESOURCE REQ while TBF not finished, killing pending UL TBF\n"); |
| 673 | tbf_free(ul_tbf); |
| 674 | } |
| 675 | |
Pau Espin Pedrol | c6571b5 | 2021-05-10 17:10:37 +0200 | [diff] [blame] | 676 | ul_tbf = tbf_alloc_ul_pacch(bts(), ms, trx_no(), tlli); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 677 | if (!ul_tbf) { |
Pau Espin Pedrol | 54742f2 | 2021-04-26 16:48:34 +0200 | [diff] [blame] | 678 | handle_tbf_reject(bts(), ms, trx_no(), ts_no); |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 679 | goto return_unref; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 680 | } |
| 681 | |
| 682 | /* set control ts to current MS's TS, until assignment complete */ |
Pau Espin Pedrol | 506eb23 | 2019-12-24 13:02:48 +0100 | [diff] [blame] | 683 | 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] | 684 | ul_tbf->control_ts, ts_no); |
| 685 | |
| 686 | ul_tbf->control_ts = ts_no; |
| 687 | /* schedule uplink assignment */ |
Pau Espin Pedrol | 6ad11a6 | 2021-07-27 12:27:08 +0200 | [diff] [blame] | 688 | osmo_fsm_inst_dispatch(ul_tbf->ul_ass_fsm.fi, TBF_UL_ASS_EV_SCHED_ASS, NULL); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 689 | |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 690 | /* get measurements */ |
Pau Espin Pedrol | 4347997 | 2021-04-22 19:18:13 +0200 | [diff] [blame] | 691 | get_meas(meas, request); |
| 692 | ms_update_l1_meas(ul_tbf->ms(), meas); |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 693 | return_unref: |
| 694 | ms_unref(ms); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 695 | return; |
| 696 | } |
| 697 | |
| 698 | if (request->ID.u.Global_TFI.UnionType) { |
| 699 | struct gprs_rlcmac_dl_tbf *dl_tbf; |
| 700 | int8_t tfi = request->ID.u.Global_TFI.u.DOWNLINK_TFI; |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 701 | dl_tbf = bts_dl_tbf_by_tfi(bts(), tfi, trx_no(), ts_no); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 702 | if (!dl_tbf) { |
Thorsten Alteholz | 8bb7904 | 2018-10-06 10:42:58 +0200 | [diff] [blame] | 703 | LOGP(DRLCMAC, LOGL_NOTICE, "PACKET RESOURCE REQ unknown downlink TFI=%d\n", tfi); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 704 | return; |
| 705 | } |
| 706 | LOGPTBFDL(dl_tbf, LOGL_ERROR, |
| 707 | "RX: [PCU <- BTS] FIXME: Packet resource request\n"); |
| 708 | |
| 709 | /* Reset N3101 counter: */ |
Max | 847ed9f | 2018-02-20 18:16:11 +0100 | [diff] [blame] | 710 | dl_tbf->n_reset(N3101); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 711 | } else { |
| 712 | struct gprs_rlcmac_ul_tbf *ul_tbf; |
| 713 | int8_t tfi = request->ID.u.Global_TFI.u.UPLINK_TFI; |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 714 | ul_tbf = bts_ul_tbf_by_tfi(bts(), tfi, trx_no(), ts_no); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 715 | if (!ul_tbf) { |
Thorsten Alteholz | 8bb7904 | 2018-10-06 10:42:58 +0200 | [diff] [blame] | 716 | LOGP(DRLCMAC, LOGL_NOTICE, "PACKET RESOURCE REQ unknown uplink TFI=%d\n", tfi); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 717 | return; |
| 718 | } |
| 719 | LOGPTBFUL(ul_tbf, LOGL_ERROR, |
| 720 | "RX: [PCU <- BTS] FIXME: Packet resource request\n"); |
| 721 | |
| 722 | /* Reset N3101 counter: */ |
Max | 847ed9f | 2018-02-20 18:16:11 +0100 | [diff] [blame] | 723 | ul_tbf->n_reset(N3101); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 724 | } |
| 725 | } |
| 726 | |
| 727 | void gprs_rlcmac_pdch::rcv_measurement_report(Packet_Measurement_Report_t *report, uint32_t fn) |
| 728 | { |
Pau Espin Pedrol | b69928c | 2020-08-18 20:29:40 +0200 | [diff] [blame] | 729 | struct gprs_rlcmac_sba *sba; |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 730 | struct pdch_ulc_node *poll; |
Pau Espin Pedrol | b69928c | 2020-08-18 20:29:40 +0200 | [diff] [blame] | 731 | GprsMs *ms; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 732 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 733 | ms = bts_ms_by_tlli(bts(), report->TLLI, GSM_RESERVED_TMSI); |
Pau Espin Pedrol | b69928c | 2020-08-18 20:29:40 +0200 | [diff] [blame] | 734 | if (!ms) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 735 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, "MS send measurement " |
| 736 | "but TLLI 0x%08x is unknown\n", report->TLLI); |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 737 | ms = bts_alloc_ms(bts(), 0, 0); |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 738 | ms_set_tlli(ms, report->TLLI); |
Pau Espin Pedrol | b69928c | 2020-08-18 20:29:40 +0200 | [diff] [blame] | 739 | } |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 740 | if ((poll = pdch_ulc_get_node(ulc, fn))) { |
| 741 | switch (poll->type) { |
| 742 | case PDCH_ULC_NODE_TBF_USF: |
Pau Espin Pedrol | c1f38c7 | 2021-03-24 14:06:15 +0100 | [diff] [blame] | 743 | pdch_ulc_release_fn(ulc, fn); |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 744 | break; |
| 745 | case PDCH_ULC_NODE_TBF_POLL: |
| 746 | LOGPDCH(this, DRLCMAC, LOGL_INFO, "FN=%" PRIu32 " Rx Meas Report " |
| 747 | "on RRBP POLL, this probably means a DL/CTRL ACK/NACk will " |
| 748 | "need to be polled again later\n", fn); |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 749 | pdch_ulc_release_fn(ulc, fn); |
| 750 | break; |
| 751 | case PDCH_ULC_NODE_SBA: |
| 752 | sba = poll->sba.sba; |
| 753 | ms_set_ta(ms, sba->ta); |
| 754 | sba_free(sba); |
| 755 | break; |
| 756 | } |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 757 | } |
Pau Espin Pedrol | b69928c | 2020-08-18 20:29:40 +0200 | [diff] [blame] | 758 | gprs_rlcmac_meas_rep(ms, report); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 759 | } |
| 760 | |
Pau Espin Pedrol | c0a250d | 2021-01-21 18:46:13 +0100 | [diff] [blame] | 761 | void gprs_rlcmac_pdch::rcv_cell_change_notification(Packet_Cell_Change_Notification_t *notif, |
| 762 | uint32_t fn, struct pcu_l1_meas *meas) |
| 763 | { |
| 764 | GprsMs *ms; |
| 765 | |
| 766 | bts_do_rate_ctr_inc(bts(), CTR_PKT_CELL_CHG_NOTIFICATION); |
| 767 | |
| 768 | if (notif->Global_TFI.UnionType == 0) { |
| 769 | struct gprs_rlcmac_ul_tbf *ul_tbf = ul_tbf_by_tfi(notif->Global_TFI.u.UPLINK_TFI); |
| 770 | if (!ul_tbf) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 771 | 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] | 772 | return; |
| 773 | } |
| 774 | ms = ul_tbf->ms(); |
| 775 | } else if (notif->Global_TFI.UnionType == 1) { |
| 776 | struct gprs_rlcmac_dl_tbf *dl_tbf = dl_tbf_by_tfi(notif->Global_TFI.u.DOWNLINK_TFI); |
| 777 | if (!dl_tbf) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 778 | 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] | 779 | return; |
| 780 | } |
| 781 | ms = dl_tbf->ms(); |
| 782 | } else { OSMO_ASSERT(0); } |
| 783 | |
Pau Espin Pedrol | 9a6f0b1 | 2021-03-24 14:05:04 +0100 | [diff] [blame] | 784 | pdch_ulc_release_fn(ulc, fn); |
| 785 | |
Pau Espin Pedrol | c0a250d | 2021-01-21 18:46:13 +0100 | [diff] [blame] | 786 | ms_update_l1_meas(ms, meas); |
| 787 | ms_nacc_start(ms, notif); |
| 788 | } |
| 789 | |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 790 | /* Received Uplink RLC control block. */ |
Pau Espin Pedrol | 812d466 | 2019-09-25 13:35:11 +0200 | [diff] [blame] | 791 | 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] | 792 | uint32_t fn, struct pcu_l1_meas *meas, enum CodingScheme cs) |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 793 | { |
Pau Espin Pedrol | 812d466 | 2019-09-25 13:35:11 +0200 | [diff] [blame] | 794 | bitvec *rlc_block; |
| 795 | RlcMacUplink_t *ul_control_block; |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 796 | unsigned len = mcs_max_bytes_ul(cs); |
Pau Espin Pedrol | 5e300ce | 2020-02-03 17:18:03 +0100 | [diff] [blame] | 797 | int rc; |
Pau Espin Pedrol | 812d466 | 2019-09-25 13:35:11 +0200 | [diff] [blame] | 798 | |
| 799 | if (!(rlc_block = bitvec_alloc(len, tall_pcu_ctx))) |
| 800 | return -ENOMEM; |
| 801 | bitvec_unpack(rlc_block, data); |
| 802 | ul_control_block = (RlcMacUplink_t *)talloc_zero(tall_pcu_ctx, RlcMacUplink_t); |
| 803 | |
Pau Espin Pedrol | 68bfdff | 2021-03-09 20:19:51 +0100 | [diff] [blame] | 804 | LOGPDCH(this, DRLCMAC, LOGL_DEBUG, "FN=%u +++++++++++++++++++++++++ RX : Uplink Control Block +++++++++++++++++++++++++\n", fn); |
Keith | 6fd8ffb | 2020-03-05 19:48:24 -0600 | [diff] [blame] | 805 | |
Keith | 2b6acd8 | 2020-03-26 16:33:59 -0500 | [diff] [blame] | 806 | rc = decode_gsm_rlcmac_uplink(rlc_block, ul_control_block); |
Keith | 6fd8ffb | 2020-03-05 19:48:24 -0600 | [diff] [blame] | 807 | 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] | 808 | 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] | 809 | else |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 810 | 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] | 811 | |
Pau Espin Pedrol | 16705a4 | 2020-10-27 10:24:57 +0100 | [diff] [blame] | 812 | if (rc < 0) { |
Pau Espin Pedrol | 68bfdff | 2021-03-09 20:19:51 +0100 | [diff] [blame] | 813 | LOGPDCH(this, DRLCMACUL, LOGL_ERROR, "FN=%u Dropping Uplink Control Block " |
| 814 | "with invalid content, decode failed: %d)\n", fn, rc); |
Pau Espin Pedrol | 5e300ce | 2020-02-03 17:18:03 +0100 | [diff] [blame] | 815 | goto free_ret; |
| 816 | } |
Pau Espin Pedrol | 68bfdff | 2021-03-09 20:19:51 +0100 | [diff] [blame] | 817 | LOGPDCH(this, DRLCMAC, LOGL_DEBUG, "FN=%u ------------------------- RX : Uplink Control Block -------------------------\n", fn); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 818 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 819 | bts_do_rate_ctr_inc(bts(), CTR_RLC_RECV_CONTROL); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 820 | switch (ul_control_block->u.MESSAGE_TYPE) { |
| 821 | case MT_PACKET_CONTROL_ACK: |
| 822 | rcv_control_ack(&ul_control_block->u.Packet_Control_Acknowledgement, fn); |
| 823 | break; |
| 824 | case MT_PACKET_DOWNLINK_ACK_NACK: |
Pau Espin Pedrol | e13cdc5 | 2019-09-25 13:46:14 +0200 | [diff] [blame] | 825 | 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] | 826 | break; |
| 827 | case MT_EGPRS_PACKET_DOWNLINK_ACK_NACK: |
Pau Espin Pedrol | e13cdc5 | 2019-09-25 13:46:14 +0200 | [diff] [blame] | 828 | 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] | 829 | break; |
| 830 | case MT_PACKET_RESOURCE_REQUEST: |
Pau Espin Pedrol | e13cdc5 | 2019-09-25 13:46:14 +0200 | [diff] [blame] | 831 | rcv_resource_request(&ul_control_block->u.Packet_Resource_Request, fn, meas); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 832 | break; |
| 833 | case MT_PACKET_MEASUREMENT_REPORT: |
| 834 | rcv_measurement_report(&ul_control_block->u.Packet_Measurement_Report, fn); |
| 835 | break; |
| 836 | case MT_PACKET_UPLINK_DUMMY_CONTROL_BLOCK: |
| 837 | /* ignoring it. change the SI to not force sending these? */ |
| 838 | break; |
Pau Espin Pedrol | c0a250d | 2021-01-21 18:46:13 +0100 | [diff] [blame] | 839 | case MT_PACKET_CELL_CHANGE_NOTIFICATION: |
| 840 | rcv_cell_change_notification(&ul_control_block->u.Packet_Cell_Change_Notification, fn, meas); |
| 841 | break; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 842 | default: |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 843 | bts_do_rate_ctr_inc(bts(), CTR_DECODE_ERRORS); |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 844 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, |
Pau Espin Pedrol | 68bfdff | 2021-03-09 20:19:51 +0100 | [diff] [blame] | 845 | "FN=%u RX: [PCU <- BTS] unknown control block(%d) received\n", |
| 846 | fn, ul_control_block->u.MESSAGE_TYPE); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 847 | } |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 848 | |
Pau Espin Pedrol | 5e300ce | 2020-02-03 17:18:03 +0100 | [diff] [blame] | 849 | free_ret: |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 850 | talloc_free(ul_control_block); |
Pau Espin Pedrol | 812d466 | 2019-09-25 13:35:11 +0200 | [diff] [blame] | 851 | bitvec_free(rlc_block); |
Pau Espin Pedrol | 5e300ce | 2020-02-03 17:18:03 +0100 | [diff] [blame] | 852 | return rc; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 853 | } |
| 854 | |
| 855 | /* received RLC/MAC block from L1 */ |
| 856 | int gprs_rlcmac_pdch::rcv_block(uint8_t *data, uint8_t len, uint32_t fn, |
| 857 | struct pcu_l1_meas *meas) |
| 858 | { |
Pau Espin Pedrol | 3061711 | 2021-03-05 18:59:05 +0100 | [diff] [blame] | 859 | /* First of all, update TDMA clock: */ |
| 860 | bts_set_current_frame_number(trx->bts, fn); |
| 861 | |
Pau Espin Pedrol | 3cba94d | 2021-03-05 18:54:01 +0100 | [diff] [blame] | 862 | /* No successfully decoded UL block was received during this FN: */ |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 863 | if (len == 0) |
Pau Espin Pedrol | 3cba94d | 2021-03-05 18:54:01 +0100 | [diff] [blame] | 864 | return 0; |
Pau Espin Pedrol | 3cba94d | 2021-03-05 18:54:01 +0100 | [diff] [blame] | 865 | |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 866 | enum CodingScheme cs = mcs_get_by_size_ul(len); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 867 | if (!cs) { |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 868 | bts_do_rate_ctr_inc(bts(), CTR_DECODE_ERRORS); |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 869 | LOGPDCH(this, DRLCMACUL, LOGL_ERROR, "Dropping data block with invalid " |
| 870 | "length %d: %s\n", len, osmo_hexdump(data, len)); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 871 | return -EINVAL; |
| 872 | } |
| 873 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 874 | bts_do_rate_ctr_add(bts(), CTR_RLC_UL_BYTES, len); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 875 | |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 876 | LOGPDCH(this, DRLCMACUL, LOGL_DEBUG, "Got RLC block, coding scheme: %s, " |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 877 | "length: %d (%d))\n", mcs_name(cs), len, mcs_used_size_ul(cs)); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 878 | |
Max | 8a8e0fb | 2019-03-25 16:32:50 +0100 | [diff] [blame] | 879 | if (mcs_is_gprs(cs)) |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 880 | return rcv_block_gprs(data, len, fn, meas, cs); |
| 881 | |
Max | 8a8e0fb | 2019-03-25 16:32:50 +0100 | [diff] [blame] | 882 | if (mcs_is_edge(cs)) |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 883 | return rcv_data_block(data, len, fn, meas, cs); |
| 884 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 885 | bts_do_rate_ctr_inc(bts(), CTR_DECODE_ERRORS); |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 886 | LOGPDCH(this, DRLCMACUL, LOGL_ERROR, "Unsupported coding scheme %s\n", |
Max | 136ebcc | 2019-03-05 14:59:03 +0100 | [diff] [blame] | 887 | mcs_name(cs)); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 888 | return -EINVAL; |
| 889 | } |
| 890 | |
| 891 | /*! \brief process egprs and gprs data blocks */ |
| 892 | 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] | 893 | struct pcu_l1_meas *meas, enum CodingScheme cs) |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 894 | { |
| 895 | int rc; |
| 896 | struct gprs_rlc_data_info rlc_dec; |
| 897 | struct gprs_rlcmac_ul_tbf *tbf; |
Pau Espin Pedrol | c1f38c7 | 2021-03-24 14:06:15 +0100 | [diff] [blame] | 898 | struct pdch_ulc_node *node; |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 899 | unsigned len = mcs_size_ul(cs); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 900 | |
| 901 | /* These are always data blocks, since EGPRS still uses CS-1 for |
| 902 | * control blocks (see 44.060, section 10.3, 1st par.) |
| 903 | */ |
Max | 8a8e0fb | 2019-03-25 16:32:50 +0100 | [diff] [blame] | 904 | if (mcs_is_edge(cs)) { |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 905 | 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] | 906 | trx_no(), ts_no, GSMTAP_CHANNEL_PDTCH, fn, |
| 907 | data, data_len, meas); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 908 | } else { |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 909 | 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] | 910 | trx_no(), ts_no, GSMTAP_CHANNEL_PDTCH, fn, |
| 911 | data, data_len, meas); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 912 | } |
| 913 | |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 914 | LOGPDCH(this, DRLCMACUL, LOGL_DEBUG, " UL data: %s\n", osmo_hexdump(data, len)); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 915 | |
| 916 | rc = Decoding::rlc_parse_ul_data_header(&rlc_dec, data, cs); |
| 917 | if (rc < 0) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 918 | LOGPDCH(this, DRLCMACUL, LOGL_ERROR, |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 919 | "Got %s RLC block but header parsing has failed\n", |
Max | 136ebcc | 2019-03-05 14:59:03 +0100 | [diff] [blame] | 920 | mcs_name(cs)); |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 921 | bts_do_rate_ctr_inc(bts(), CTR_DECODE_ERRORS); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 922 | return rc; |
| 923 | } |
| 924 | |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 925 | LOGPDCH(this, DRLCMACUL, LOGL_INFO, |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 926 | "Got %s RLC block: " |
| 927 | "R=%d, SI=%d, TFI=%d, CPS=%d, RSB=%d, " |
| 928 | "rc=%d\n", |
Max | 136ebcc | 2019-03-05 14:59:03 +0100 | [diff] [blame] | 929 | mcs_name(cs), |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 930 | rlc_dec.r, rlc_dec.si, rlc_dec.tfi, rlc_dec.cps, rlc_dec.rsb, |
| 931 | rc); |
| 932 | |
| 933 | /* find TBF inst from given TFI */ |
| 934 | tbf = ul_tbf_by_tfi(rlc_dec.tfi); |
| 935 | if (!tbf) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 936 | LOGPDCH(this, DRLCMACUL, LOGL_NOTICE, "UL DATA unknown TFI=%d\n", |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 937 | rlc_dec.tfi); |
| 938 | return 0; |
| 939 | } |
| 940 | |
Pau Espin Pedrol | c1f38c7 | 2021-03-24 14:06:15 +0100 | [diff] [blame] | 941 | node = pdch_ulc_get_node(ulc, fn); |
| 942 | if (node) { |
| 943 | switch (node->type) { |
| 944 | case PDCH_ULC_NODE_TBF_USF: |
| 945 | if (tbf != node->tbf_usf.ul_tbf) |
| 946 | LOGPDCH(this, DRLCMACUL, LOGL_NOTICE, "FN=%" PRIu32 " " |
| 947 | "Rx UL DATA from unexpected %s vs expected %s\n", |
| 948 | fn, tbf_name(tbf), tbf_name(node->tbf_usf.ul_tbf)); |
| 949 | break; |
| 950 | case PDCH_ULC_NODE_TBF_POLL: |
| 951 | LOGPDCH(this, DRLCMACUL, LOGL_NOTICE, "FN=%" PRIu32 " " |
| 952 | "Rx UL DATA from unexpected %s vs expected POLL %s\n", |
| 953 | fn, tbf_name(tbf), tbf_name(node->tbf_poll.poll_tbf)); |
| 954 | break; |
| 955 | case PDCH_ULC_NODE_SBA: |
| 956 | LOGPDCH(this, DRLCMACUL, LOGL_NOTICE, "FN=%" PRIu32 " " |
| 957 | "Rx UL DATA from unexpected %s vs expected SBA\n", |
| 958 | fn, tbf_name(tbf)); |
| 959 | break; |
| 960 | } |
| 961 | pdch_ulc_release_node(ulc, node); |
| 962 | } else { |
| 963 | LOGPDCH(this, DRLCMACUL, LOGL_NOTICE, "FN=%" PRIu32 " " |
| 964 | "Rx UL DATA from unexpected %s\n", fn, tbf_name(tbf)); |
| 965 | } |
| 966 | |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 967 | /* Reset N3101 counter: */ |
Max | 847ed9f | 2018-02-20 18:16:11 +0100 | [diff] [blame] | 968 | tbf->n_reset(N3101); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 969 | |
| 970 | return tbf->rcv_data_block_acknowledged(&rlc_dec, data, meas); |
| 971 | } |
| 972 | |
| 973 | 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] | 974 | struct pcu_l1_meas *meas, enum CodingScheme cs) |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 975 | { |
| 976 | unsigned payload = data[0] >> 6; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 977 | int rc = 0; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 978 | |
| 979 | switch (payload) { |
| 980 | case GPRS_RLCMAC_DATA_BLOCK: |
| 981 | rc = rcv_data_block(data, data_len, fn, meas, cs); |
| 982 | break; |
| 983 | case GPRS_RLCMAC_CONTROL_BLOCK: |
Pau Espin Pedrol | e13cdc5 | 2019-09-25 13:46:14 +0200 | [diff] [blame] | 984 | rc = rcv_control_block(data, data_len, fn, meas, cs); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 985 | break; |
| 986 | case GPRS_RLCMAC_CONTROL_BLOCK_OPT: |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 987 | 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] | 988 | break; |
| 989 | default: |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 990 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, "Unknown RLCMAC block payload(%u).\n", payload); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 991 | rc = -EINVAL; |
| 992 | } |
| 993 | |
| 994 | return rc; |
| 995 | } |
| 996 | |
| 997 | gprs_rlcmac_tbf *gprs_rlcmac_pdch::tbf_from_list_by_tfi( |
| 998 | LListHead<gprs_rlcmac_tbf> *tbf_list, uint8_t tfi, |
| 999 | enum gprs_rlcmac_tbf_direction dir) |
| 1000 | { |
| 1001 | gprs_rlcmac_tbf *tbf; |
| 1002 | LListHead<gprs_rlcmac_tbf> *pos; |
| 1003 | |
| 1004 | llist_for_each(pos, tbf_list) { |
| 1005 | tbf = pos->entry(); |
| 1006 | if (tbf->tfi() != tfi) |
| 1007 | continue; |
| 1008 | if (!tbf->pdch[ts_no]) |
| 1009 | continue; |
| 1010 | return tbf; |
| 1011 | } |
| 1012 | return NULL; |
| 1013 | } |
| 1014 | |
| 1015 | gprs_rlcmac_ul_tbf *gprs_rlcmac_pdch::ul_tbf_by_tfi(uint8_t tfi) |
| 1016 | { |
| 1017 | return as_ul_tbf(tbf_by_tfi(tfi, GPRS_RLCMAC_UL_TBF)); |
| 1018 | } |
| 1019 | |
| 1020 | gprs_rlcmac_dl_tbf *gprs_rlcmac_pdch::dl_tbf_by_tfi(uint8_t tfi) |
| 1021 | { |
| 1022 | return as_dl_tbf(tbf_by_tfi(tfi, GPRS_RLCMAC_DL_TBF)); |
| 1023 | } |
| 1024 | |
| 1025 | /* lookup TBF Entity (by TFI) */ |
| 1026 | gprs_rlcmac_tbf *gprs_rlcmac_pdch::tbf_by_tfi(uint8_t tfi, |
| 1027 | enum gprs_rlcmac_tbf_direction dir) |
| 1028 | { |
| 1029 | struct gprs_rlcmac_tbf *tbf; |
| 1030 | |
| 1031 | if (tfi >= 32) |
| 1032 | return NULL; |
| 1033 | |
| 1034 | tbf = m_tbfs[dir][tfi]; |
| 1035 | |
Pau Espin Pedrol | 710e0e9 | 2021-04-22 21:03:33 +0200 | [diff] [blame] | 1036 | return tbf; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1037 | } |
| 1038 | |
Oliver Smith | 402451b | 2021-09-08 09:33:24 +0200 | [diff] [blame] | 1039 | void gprs_rlcmac_pdch::num_tbfs_update(gprs_rlcmac_tbf *tbf, bool is_attach) |
| 1040 | { |
| 1041 | int threshold = is_attach ? 0 : 1; |
| 1042 | int inc = is_attach ? 1 : -1; |
| 1043 | uint8_t ul_dl_gprs = m_num_tbfs_gprs[GPRS_RLCMAC_UL_TBF] + |
| 1044 | m_num_tbfs_gprs[GPRS_RLCMAC_DL_TBF]; |
| 1045 | uint8_t ul_dl_egprs = m_num_tbfs_egprs[GPRS_RLCMAC_UL_TBF] + |
| 1046 | m_num_tbfs_egprs[GPRS_RLCMAC_DL_TBF]; |
| 1047 | |
| 1048 | /* Count PDCHs with at least one TBF as "occupied", as in |
| 1049 | * 3GPP TS 52.402 § B.2.1.42-44. So if transitioning from 0 (threshold) |
| 1050 | * TBFs in this PDCH to 1, increase the counter by 1 (inc). */ |
| 1051 | if (ul_dl_gprs + ul_dl_egprs == threshold) |
| 1052 | bts_stat_item_add(trx->bts, STAT_PDCH_OCCUPIED, inc); |
| 1053 | |
| 1054 | /* Update occupied GPRS/EGPRS stats (§ B.2.1.54-55) too */ |
| 1055 | if (tbf->is_egprs_enabled() && ul_dl_egprs == threshold) |
| 1056 | bts_stat_item_add(trx->bts, STAT_PDCH_OCCUPIED_EGPRS, inc); |
| 1057 | else if (!tbf->is_egprs_enabled() && ul_dl_gprs == threshold) |
| 1058 | bts_stat_item_add(trx->bts, STAT_PDCH_OCCUPIED_GPRS, inc); |
| 1059 | |
| 1060 | if (tbf->is_egprs_enabled()) |
| 1061 | m_num_tbfs_egprs[tbf->direction] += inc; |
| 1062 | else |
| 1063 | m_num_tbfs_gprs[tbf->direction] += inc; |
| 1064 | } |
| 1065 | |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1066 | void gprs_rlcmac_pdch::attach_tbf(gprs_rlcmac_tbf *tbf) |
| 1067 | { |
| 1068 | gprs_rlcmac_ul_tbf *ul_tbf; |
| 1069 | |
| 1070 | if (m_tbfs[tbf->direction][tbf->tfi()]) |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 1071 | LOGPDCH(this, DRLCMAC, LOGL_ERROR, |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1072 | "%s has not been detached, overwriting it\n", |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1073 | m_tbfs[tbf->direction][tbf->tfi()]->name()); |
| 1074 | |
Oliver Smith | 402451b | 2021-09-08 09:33:24 +0200 | [diff] [blame] | 1075 | num_tbfs_update(tbf, true); |
Pau Espin Pedrol | b5fece9 | 2021-08-23 16:58:04 +0200 | [diff] [blame] | 1076 | if (tbf->direction == GPRS_RLCMAC_UL_TBF) { |
| 1077 | ul_tbf = as_ul_tbf(tbf); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1078 | m_assigned_usf |= 1 << ul_tbf->m_usf[ts_no]; |
| 1079 | } |
| 1080 | m_assigned_tfi[tbf->direction] |= 1UL << tbf->tfi(); |
| 1081 | m_tbfs[tbf->direction][tbf->tfi()] = tbf; |
| 1082 | |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 1083 | LOGPDCH(this, DRLCMAC, LOGL_INFO, "Attaching %s, %d TBFs, " |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1084 | "USFs = %02x, TFIs = %08x.\n", |
Oliver Smith | 402451b | 2021-09-08 09:33:24 +0200 | [diff] [blame] | 1085 | tbf->name(), num_tbfs(tbf->direction), |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1086 | m_assigned_usf, m_assigned_tfi[tbf->direction]); |
| 1087 | } |
| 1088 | |
| 1089 | void gprs_rlcmac_pdch::detach_tbf(gprs_rlcmac_tbf *tbf) |
| 1090 | { |
| 1091 | gprs_rlcmac_ul_tbf *ul_tbf; |
| 1092 | |
Oliver Smith | 402451b | 2021-09-08 09:33:24 +0200 | [diff] [blame] | 1093 | if (tbf->is_egprs_enabled()) { |
| 1094 | OSMO_ASSERT(m_num_tbfs_egprs[tbf->direction] > 0); |
| 1095 | } else { |
| 1096 | OSMO_ASSERT(m_num_tbfs_gprs[tbf->direction] > 0); |
| 1097 | } |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1098 | |
Oliver Smith | 402451b | 2021-09-08 09:33:24 +0200 | [diff] [blame] | 1099 | num_tbfs_update(tbf, false); |
Pau Espin Pedrol | b5fece9 | 2021-08-23 16:58:04 +0200 | [diff] [blame] | 1100 | if (tbf->direction == GPRS_RLCMAC_UL_TBF) { |
| 1101 | ul_tbf = as_ul_tbf(tbf); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1102 | m_assigned_usf &= ~(1 << ul_tbf->m_usf[ts_no]); |
| 1103 | } |
| 1104 | m_assigned_tfi[tbf->direction] &= ~(1UL << tbf->tfi()); |
| 1105 | m_tbfs[tbf->direction][tbf->tfi()] = NULL; |
| 1106 | |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 1107 | pdch_ulc_release_tbf(ulc, tbf); |
| 1108 | |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 1109 | LOGPDCH(this, DRLCMAC, LOGL_INFO, "Detaching %s, %d TBFs, " |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1110 | "USFs = %02x, TFIs = %08x.\n", |
Oliver Smith | 402451b | 2021-09-08 09:33:24 +0200 | [diff] [blame] | 1111 | tbf->name(), num_tbfs(tbf->direction), |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1112 | m_assigned_usf, m_assigned_tfi[tbf->direction]); |
| 1113 | } |
| 1114 | |
Pau Espin Pedrol | 2286288 | 2020-11-16 17:35:10 +0100 | [diff] [blame] | 1115 | bool gprs_rlcmac_pdch::has_gprs_only_tbf_attached() const |
| 1116 | { |
| 1117 | unsigned int i; |
| 1118 | unsigned int j; |
| 1119 | for (i = 0; i < sizeof(m_assigned_tfi[0]); i++) { |
| 1120 | for (j = 0; j < 2; j++) { |
| 1121 | if (m_assigned_tfi[j] & (1UL << i)) { |
| 1122 | gprs_rlcmac_tbf *tbf = m_tbfs[j][i]; |
| 1123 | if (!tbf->is_egprs_enabled()) |
| 1124 | return true; |
| 1125 | } |
| 1126 | } |
| 1127 | } |
| 1128 | return false; |
| 1129 | } |
| 1130 | |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1131 | void gprs_rlcmac_pdch::reserve(enum gprs_rlcmac_tbf_direction dir) |
| 1132 | { |
| 1133 | m_num_reserved[dir] += 1; |
| 1134 | } |
| 1135 | |
| 1136 | void gprs_rlcmac_pdch::unreserve(enum gprs_rlcmac_tbf_direction dir) |
| 1137 | { |
| 1138 | OSMO_ASSERT(m_num_reserved[dir] > 0); |
| 1139 | m_num_reserved[dir] -= 1; |
| 1140 | } |
| 1141 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1142 | inline struct gprs_rlcmac_bts *gprs_rlcmac_pdch::bts() const |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1143 | { |
| 1144 | return trx->bts; |
| 1145 | } |
| 1146 | |
| 1147 | uint8_t gprs_rlcmac_pdch::trx_no() const |
| 1148 | { |
| 1149 | return trx->trx_no; |
| 1150 | } |
| 1151 | |
Vadim Yanitskiy | bd0dac3 | 2019-10-05 21:57:14 +0700 | [diff] [blame] | 1152 | uint8_t gprs_rlcmac_pdch::reserve_tai(uint8_t ta) |
| 1153 | { |
| 1154 | uint8_t tai; |
| 1155 | |
| 1156 | for (tai = 0; tai < PTCCH_TAI_NUM; tai++) { |
| 1157 | if (ptcch_msg[tai] == PTCCH_TAI_FREE) { |
| 1158 | ptcch_msg[tai] = ta; |
| 1159 | return tai; |
| 1160 | } |
| 1161 | } |
| 1162 | |
| 1163 | /* Special case: no free TAI available */ |
| 1164 | return PTCCH_TAI_FREE; |
| 1165 | } |
| 1166 | |
| 1167 | void gprs_rlcmac_pdch::release_tai(uint8_t tai) |
| 1168 | { |
| 1169 | OSMO_ASSERT(tai < PTCCH_TAI_NUM); |
| 1170 | ptcch_msg[tai] = PTCCH_TAI_FREE; |
| 1171 | } |
| 1172 | |
| 1173 | void gprs_rlcmac_pdch::update_ta(uint8_t tai, uint8_t ta) |
| 1174 | { |
| 1175 | OSMO_ASSERT(tai < PTCCH_TAI_NUM); |
| 1176 | ptcch_msg[tai] = ta; |
| 1177 | } |
Pau Espin Pedrol | 906aafc | 2021-01-18 17:53:29 +0100 | [diff] [blame] | 1178 | |
| 1179 | void pdch_free_all_tbf(struct gprs_rlcmac_pdch *pdch) |
| 1180 | { |
Pau Espin Pedrol | 1d663d9 | 2021-09-03 12:39:26 +0200 | [diff] [blame] | 1181 | struct llist_item *pos; |
| 1182 | struct llist_item *pos2; |
| 1183 | |
Pau Espin Pedrol | 906aafc | 2021-01-18 17:53:29 +0100 | [diff] [blame] | 1184 | for (uint8_t tfi = 0; tfi < 32; tfi++) { |
| 1185 | struct gprs_rlcmac_tbf *tbf; |
| 1186 | |
| 1187 | tbf = pdch->ul_tbf_by_tfi(tfi); |
| 1188 | if (tbf) |
| 1189 | tbf_free(tbf); |
| 1190 | tbf = pdch->dl_tbf_by_tfi(tfi); |
| 1191 | if (tbf) |
| 1192 | tbf_free(tbf); |
| 1193 | } |
Pau Espin Pedrol | 1d663d9 | 2021-09-03 12:39:26 +0200 | [diff] [blame] | 1194 | |
| 1195 | /* Some temporary dummy TBFs to tx ImmAssRej may be left linked to the |
| 1196 | * PDCH, since they have no TFI assigned (see handle_tbf_reject()). |
| 1197 | * Get rid of them too: */ |
| 1198 | llist_for_each_entry_safe(pos, pos2, &pdch->trx->ul_tbfs, list) { |
| 1199 | struct gprs_rlcmac_ul_tbf *ul_tbf = as_ul_tbf((struct gprs_rlcmac_tbf *)pos->entry); |
| 1200 | if (ul_tbf->control_ts == pdch->ts_no) |
| 1201 | tbf_free(ul_tbf); |
| 1202 | } |
Pau Espin Pedrol | 906aafc | 2021-01-18 17:53:29 +0100 | [diff] [blame] | 1203 | } |
Pau Espin Pedrol | e91c4c7 | 2021-01-18 17:54:30 +0100 | [diff] [blame] | 1204 | |
Pau Espin Pedrol | 4f67a9b | 2021-06-30 16:03:06 +0200 | [diff] [blame] | 1205 | void pdch_disable(struct gprs_rlcmac_pdch *pdch) |
| 1206 | { |
Pau Espin Pedrol | e91c4c7 | 2021-01-18 17:54:30 +0100 | [diff] [blame] | 1207 | pdch->disable(); |
| 1208 | } |
Pau Espin Pedrol | 4f67a9b | 2021-06-30 16:03:06 +0200 | [diff] [blame] | 1209 | |
| 1210 | bool pdch_is_enabled(const struct gprs_rlcmac_pdch *pdch) |
| 1211 | { |
| 1212 | return pdch->is_enabled(); |
| 1213 | } |