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 | 5922396 | 2021-10-18 12:24:38 +0200 | [diff] [blame] | 122 | gprs_rlcmac_ul_tbf *ul_tbf = tbf_alloc_ul_pacch(bts, tbf->ms(), tbf->trx->trx_no); |
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); |
Pau Espin Pedrol | e9db5c7 | 2021-09-28 16:38:05 +0200 | [diff] [blame] | 317 | if (!poll || poll->type != PDCH_ULC_NODE_TBF_POLL) { |
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 | e9db5c7 | 2021-09-28 16:38:05 +0200 | [diff] [blame] | 333 | OSMO_ASSERT(poll->tbf_poll.poll_tbf); |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 334 | tbf = poll->tbf_poll.poll_tbf; |
Pau Espin Pedrol | 86580e1 | 2021-03-29 18:15:30 +0200 | [diff] [blame] | 335 | reason = poll->tbf_poll.reason; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 336 | |
| 337 | /* Reset N3101 counter: */ |
Max | 847ed9f | 2018-02-20 18:16:11 +0100 | [diff] [blame] | 338 | tbf->n_reset(N3101); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 339 | |
| 340 | tbf->update_ms(tlli, GPRS_RLCMAC_UL_TBF); |
Pau Espin Pedrol | ab17890 | 2021-06-22 22:15:20 +0200 | [diff] [blame] | 341 | /* Gather MS from TBF, since it may be NULL or may have been merged during update_ms */ |
| 342 | ms = tbf->ms(); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 343 | |
Pau Espin Pedrol | c6e911c | 2021-06-07 18:13:23 +0200 | [diff] [blame] | 344 | LOGPTBF(tbf, LOGL_DEBUG, "FN=%" PRIu32 " Rx Packet Control Ack (reason=%s)\n", |
| 345 | fn, get_value_string(pdch_ulc_tbf_poll_reason_names, reason)); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 346 | |
Pau Espin Pedrol | c8d2166 | 2021-09-28 13:27:51 +0200 | [diff] [blame] | 347 | switch (reason) { |
| 348 | case PDCH_ULC_POLL_UL_ACK: |
| 349 | ul_tbf = as_ul_tbf(tbf); |
| 350 | OSMO_ASSERT(ul_tbf); |
| 351 | if (!tbf_ul_ack_exp_ctrl_ack(ul_tbf, fn, ts_no)) { |
| 352 | LOGPTBF(tbf, LOGL_NOTICE, "FN=%d, TS=%d (curr FN %d): POLL_UL_ACK not expected!\n", |
| 353 | fn, ts_no, bts_current_frame_number(tbf->bts)); |
| 354 | return; |
| 355 | } |
Pau Espin Pedrol | 0dbf6f2 | 2021-10-11 18:08:25 +0200 | [diff] [blame] | 356 | pdch_ulc_release_fn(ulc, fn); |
Pau Espin Pedrol | ea8dbdd | 2021-07-29 18:39:16 +0200 | [diff] [blame] | 357 | osmo_fsm_inst_dispatch(ul_tbf->ul_ack_fsm.fi, TBF_UL_ACK_EV_RX_CTRL_ACK, NULL); |
Pau Espin Pedrol | 7a2b65e | 2021-10-11 19:18:13 +0200 | [diff] [blame] | 358 | /* We only set polling on final UL ACK/NACK */ |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 359 | LOGPTBF(tbf, LOGL_DEBUG, "[UPLINK] END\n"); |
Pau Espin Pedrol | 7a2b65e | 2021-10-11 19:18:13 +0200 | [diff] [blame] | 360 | osmo_fsm_inst_dispatch(ul_tbf->state_fsm.fi, TBF_EV_FINAL_UL_ACK_CONFIRMED, NULL); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 361 | return; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 362 | |
Pau Espin Pedrol | c8d2166 | 2021-09-28 13:27:51 +0200 | [diff] [blame] | 363 | case PDCH_ULC_POLL_UL_ASS: |
| 364 | if (!tbf->ul_ass_state_is(TBF_UL_ASS_WAIT_ACK)) { |
| 365 | LOGPTBF(tbf, LOGL_NOTICE, "FN=%d, TS=%d (curr FN %d): POLL_UL_ASS not expected! state is %s\n", |
| 366 | fn, ts_no, bts_current_frame_number(tbf->bts), |
| 367 | osmo_fsm_inst_state_name(tbf_ul_ass_fi(tbf))); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 368 | return; |
| 369 | } |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 370 | LOGPTBF(tbf, LOGL_DEBUG, "[DOWNLINK] UPLINK ASSIGNED\n"); |
Pau Espin Pedrol | 0dbf6f2 | 2021-10-11 18:08:25 +0200 | [diff] [blame] | 371 | pdch_ulc_release_fn(ulc, fn); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 372 | /* reset N3105 */ |
Max | 847ed9f | 2018-02-20 18:16:11 +0100 | [diff] [blame] | 373 | tbf->n_reset(N3105); |
Pau Espin Pedrol | 6ad11a6 | 2021-07-27 12:27:08 +0200 | [diff] [blame] | 374 | 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] | 375 | |
Pau Espin Pedrol | ab17890 | 2021-06-22 22:15:20 +0200 | [diff] [blame] | 376 | new_tbf = ms_ul_tbf(ms); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 377 | if (!new_tbf) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 378 | LOGPDCH(this, DRLCMAC, LOGL_ERROR, "Got ACK, but UL " |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 379 | "TBF is gone TLLI=0x%08x\n", tlli); |
| 380 | return; |
| 381 | } |
Pau Espin Pedrol | dc2aaac | 2021-05-14 12:50:46 +0200 | [diff] [blame] | 382 | if (tbf->state_is(TBF_ST_WAIT_RELEASE) && |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 383 | tbf->direction == new_tbf->direction) |
| 384 | tbf_free(tbf); |
| 385 | |
Pau Espin Pedrol | 720e19e | 2021-07-22 19:56:37 +0200 | [diff] [blame] | 386 | 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] | 387 | /* there might be LLC packets waiting in the queue, but the DL |
| 388 | * TBF might have been released while the UL TBF has been |
| 389 | * established */ |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 390 | if (ms_need_dl_tbf(new_tbf->ms())) |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 391 | new_tbf->establish_dl_tbf_on_pacch(); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 392 | return; |
Pau Espin Pedrol | c8d2166 | 2021-09-28 13:27:51 +0200 | [diff] [blame] | 393 | |
| 394 | case PDCH_ULC_POLL_DL_ASS: |
| 395 | if (!tbf->dl_ass_state_is(TBF_DL_ASS_WAIT_ACK)) { |
| 396 | LOGPTBF(tbf, LOGL_NOTICE, "FN=%d, TS=%d (curr FN %d): POLL_DL_ASS not expected! state is %s\n", |
| 397 | fn, ts_no, bts_current_frame_number(tbf->bts), |
| 398 | osmo_fsm_inst_state_name(tbf_dl_ass_fi(tbf))); |
| 399 | return; |
| 400 | } |
| 401 | LOGPTBF(tbf, LOGL_DEBUG, "[UPLINK] DOWNLINK ASSIGNED\n"); |
Pau Espin Pedrol | 0dbf6f2 | 2021-10-11 18:08:25 +0200 | [diff] [blame] | 402 | pdch_ulc_release_fn(ulc, fn); |
Pau Espin Pedrol | c8d2166 | 2021-09-28 13:27:51 +0200 | [diff] [blame] | 403 | /* reset N3105 */ |
| 404 | tbf->n_reset(N3105); |
| 405 | osmo_fsm_inst_dispatch(tbf->dl_ass_fsm.fi, TBF_DL_ASS_EV_RX_ASS_CTRL_ACK, NULL); |
| 406 | |
| 407 | new_tbf = ms_dl_tbf(ms); |
| 408 | if (!new_tbf) { |
| 409 | LOGPDCH(this, DRLCMAC, LOGL_ERROR, "Got ACK, but DL " |
| 410 | "TBF is gone TLLI=0x%08x\n", tlli); |
| 411 | return; |
| 412 | } |
| 413 | if (tbf->state_is(TBF_ST_WAIT_RELEASE) && |
| 414 | tbf->direction == new_tbf->direction) |
| 415 | tbf_free(tbf); |
| 416 | |
| 417 | osmo_fsm_inst_dispatch(new_tbf->state_fsm.fi, TBF_EV_ASSIGN_ACK_PACCH, NULL); |
Pau Espin Pedrol | c8d2166 | 2021-09-28 13:27:51 +0200 | [diff] [blame] | 418 | return; |
| 419 | |
| 420 | case PDCH_ULC_POLL_CELL_CHG_CONTINUE: |
| 421 | if (!ms->nacc || !nacc_fsm_exp_ctrl_ack(ms->nacc, fn, ts_no)) { |
| 422 | LOGPTBF(tbf, LOGL_NOTICE, "FN=%d, TS=%d (curr FN %d): POLL_CELL_CHG_CONTINUE not expected!\n", |
| 423 | fn, ts_no, bts_current_frame_number(tbf->bts)); |
| 424 | return; |
| 425 | } |
Pau Espin Pedrol | 0dbf6f2 | 2021-10-11 18:08:25 +0200 | [diff] [blame] | 426 | pdch_ulc_release_fn(ulc, fn); |
Pau Espin Pedrol | 952cb3d | 2021-02-01 14:52:48 +0100 | [diff] [blame] | 427 | osmo_fsm_inst_dispatch(ms->nacc->fi, NACC_EV_RX_CELL_CHG_CONTINUE_ACK, NULL); |
| 428 | /* Don't assume MS is no longer reachable (hence don't free) after this: TS 44.060 |
| 429 | * "When the mobile station receives the PACKET CELL CHANGE ORDER |
| 430 | * or the PACKET CELL CHANGE CONTINUE message the mobile station |
| 431 | * shall transmit a PACKET CONTROL ACKNOWLEDGMENT message in the |
| 432 | * specified uplink radio block if a valid RRBP field is |
| 433 | * received as part of the message; the mobile station _MAY_ then |
| 434 | * switch to a new cell." |
| 435 | */ |
| 436 | return; |
Pau Espin Pedrol | c8d2166 | 2021-09-28 13:27:51 +0200 | [diff] [blame] | 437 | |
| 438 | case PDCH_ULC_POLL_DL_ACK: |
| 439 | /* Handled in rcv_control_dl_ack_nack() upon receival of DL ACK/NACK as a response to our POLL. */ |
| 440 | return; |
| 441 | default: |
| 442 | LOGPDCH(this, DRLCMAC, LOGL_ERROR, "FN=%" PRIu32 " " |
| 443 | "Error: received PACKET CONTROL ACK at no request (reason=%s)\n", fn, |
| 444 | get_value_string(pdch_ulc_tbf_poll_reason_names, reason)); |
Pau Espin Pedrol | 952cb3d | 2021-02-01 14:52:48 +0100 | [diff] [blame] | 445 | } |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 446 | } |
| 447 | |
Pau Espin Pedrol | e13cdc5 | 2019-09-25 13:46:14 +0200 | [diff] [blame] | 448 | 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] | 449 | { |
| 450 | int8_t tfi = 0; /* must be signed */ |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 451 | struct pdch_ulc_node *poll; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 452 | struct gprs_rlcmac_dl_tbf *tbf; |
| 453 | int rc; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 454 | int num_blocks; |
| 455 | uint8_t bits_data[RLC_GPRS_WS/8]; |
| 456 | bitvec bits; |
| 457 | int bsn_begin, bsn_end; |
| 458 | char show_bits[RLC_GPRS_WS + 1]; |
| 459 | |
| 460 | tfi = ack_nack->DOWNLINK_TFI; |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 461 | poll = pdch_ulc_get_node(ulc, fn); |
Pau Espin Pedrol | 8318d9c | 2021-10-11 18:17:35 +0200 | [diff] [blame] | 462 | if (!poll || poll->type != PDCH_ULC_NODE_TBF_POLL || |
| 463 | poll->tbf_poll.reason != PDCH_ULC_POLL_DL_ACK) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 464 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, "PACKET DOWNLINK ACK with " |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 465 | "unknown FN=%u TFI=%d (TRX %d TS %d)\n", |
| 466 | fn, tfi, trx_no(), ts_no); |
| 467 | return; |
| 468 | } |
Pau Espin Pedrol | e9db5c7 | 2021-09-28 16:38:05 +0200 | [diff] [blame] | 469 | OSMO_ASSERT(poll->tbf_poll.poll_tbf); |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 470 | tbf = as_dl_tbf(poll->tbf_poll.poll_tbf); |
Pau Espin Pedrol | b5fece9 | 2021-08-23 16:58:04 +0200 | [diff] [blame] | 471 | if (tbf->tfi() != tfi) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 472 | LOGPTBFDL(tbf, LOGL_NOTICE, |
| 473 | "PACKET DOWNLINK ACK with wrong TFI=%d, ignoring!\n", tfi); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 474 | return; |
| 475 | } |
| 476 | |
| 477 | /* Reset N3101 counter: */ |
Max | 847ed9f | 2018-02-20 18:16:11 +0100 | [diff] [blame] | 478 | tbf->n_reset(N3101); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 479 | |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 480 | pdch_ulc_release_fn(ulc, fn); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 481 | |
| 482 | LOGPTBF(tbf, LOGL_DEBUG, "RX: [PCU <- BTS] Packet Downlink Ack/Nack\n"); |
| 483 | |
| 484 | bits.data = bits_data; |
| 485 | bits.data_len = sizeof(bits_data); |
| 486 | bits.cur_bit = 0; |
| 487 | |
| 488 | num_blocks = Decoding::decode_gprs_acknack_bits( |
| 489 | &ack_nack->Ack_Nack_Description, &bits, |
Pau Espin Pedrol | b3f2397 | 2020-10-23 21:00:23 +0200 | [diff] [blame] | 490 | &bsn_begin, &bsn_end, static_cast<gprs_rlc_dl_window *>(tbf->window())); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 491 | |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 492 | LOGPDCH(this, DRLCMAC, LOGL_DEBUG, |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 493 | "Got GPRS DL ACK bitmap: SSN: %d, BSN %d to %d - 1 (%d blocks), " |
| 494 | "\"%s\"\n", |
| 495 | ack_nack->Ack_Nack_Description.STARTING_SEQUENCE_NUMBER, |
| 496 | bsn_begin, bsn_end, num_blocks, |
| 497 | (Decoding::extract_rbb(&bits, show_bits), show_bits)); |
| 498 | |
| 499 | rc = tbf->rcvd_dl_ack( |
| 500 | ack_nack->Ack_Nack_Description.FINAL_ACK_INDICATION, |
| 501 | bsn_begin, &bits); |
| 502 | if (rc == 1) { |
| 503 | tbf_free(tbf); |
| 504 | return; |
| 505 | } |
| 506 | /* check for channel request */ |
| 507 | if (ack_nack->Exist_Channel_Request_Description) |
Pau Espin Pedrol | 0ece97d | 2021-01-18 12:53:54 +0100 | [diff] [blame] | 508 | sched_ul_ass_or_rej(bts(), tbf); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 509 | |
| 510 | /* get measurements */ |
| 511 | if (tbf->ms()) { |
Pau Espin Pedrol | e13cdc5 | 2019-09-25 13:46:14 +0200 | [diff] [blame] | 512 | get_meas(meas, &ack_nack->Channel_Quality_Report); |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 513 | ms_update_l1_meas(tbf->ms(), meas); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 514 | } |
| 515 | } |
| 516 | |
Pau Espin Pedrol | e13cdc5 | 2019-09-25 13:46:14 +0200 | [diff] [blame] | 517 | 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] | 518 | { |
| 519 | int8_t tfi = 0; /* must be signed */ |
| 520 | struct gprs_rlcmac_dl_tbf *tbf; |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 521 | struct pdch_ulc_node *poll; |
Pau Espin Pedrol | b3f2397 | 2020-10-23 21:00:23 +0200 | [diff] [blame] | 522 | gprs_rlc_dl_window *window; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 523 | int rc; |
| 524 | int num_blocks; |
| 525 | uint8_t bits_data[RLC_EGPRS_MAX_WS/8]; |
| 526 | char show_bits[RLC_EGPRS_MAX_WS + 1]; |
| 527 | bitvec bits; |
| 528 | int bsn_begin, bsn_end; |
| 529 | |
| 530 | tfi = ack_nack->DOWNLINK_TFI; |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 531 | poll = pdch_ulc_get_node(ulc, fn); |
Pau Espin Pedrol | 8318d9c | 2021-10-11 18:17:35 +0200 | [diff] [blame] | 532 | if (!poll || poll->type != PDCH_ULC_NODE_TBF_POLL || |
| 533 | poll->tbf_poll.reason != PDCH_ULC_POLL_DL_ACK) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 534 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, "EGPRS PACKET DOWNLINK ACK with " |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 535 | "unknown FN=%u TFI=%d (TRX %d TS %d)\n", |
| 536 | fn, tfi, trx_no(), ts_no); |
| 537 | return; |
| 538 | } |
Pau Espin Pedrol | e9db5c7 | 2021-09-28 16:38:05 +0200 | [diff] [blame] | 539 | OSMO_ASSERT(poll->tbf_poll.poll_tbf); |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 540 | tbf = as_dl_tbf(poll->tbf_poll.poll_tbf); |
Pau Espin Pedrol | b5fece9 | 2021-08-23 16:58:04 +0200 | [diff] [blame] | 541 | if (tbf->tfi() != tfi) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 542 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, "EGPRS PACKET DOWNLINK ACK with " |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 543 | "wrong TFI=%d, ignoring!\n", tfi); |
| 544 | return; |
| 545 | } |
| 546 | |
| 547 | /* Reset N3101 counter: */ |
Max | 847ed9f | 2018-02-20 18:16:11 +0100 | [diff] [blame] | 548 | tbf->n_reset(N3101); |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 549 | pdch_ulc_release_fn(ulc, fn); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 550 | |
| 551 | LOGPTBF(tbf, LOGL_DEBUG, |
| 552 | "RX: [PCU <- BTS] EGPRS Packet Downlink Ack/Nack\n"); |
| 553 | |
Pau Espin Pedrol | b3f2397 | 2020-10-23 21:00:23 +0200 | [diff] [blame] | 554 | window = static_cast<gprs_rlc_dl_window *>(tbf->window()); |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 555 | LOGPDCH(this, DRLCMAC, LOGL_DEBUG, "EGPRS ACK/NACK: " |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 556 | "ut: %d, final: %d, bow: %d, eow: %d, ssn: %d, have_crbb: %d, " |
| 557 | "urbb_len:%d, %p, %p, %d, %d, win: %d-%d, urbb: %s\n", |
| 558 | (int)ack_nack->EGPRS_AckNack.UnionType, |
| 559 | (int)ack_nack->EGPRS_AckNack.Desc.FINAL_ACK_INDICATION, |
| 560 | (int)ack_nack->EGPRS_AckNack.Desc.BEGINNING_OF_WINDOW, |
| 561 | (int)ack_nack->EGPRS_AckNack.Desc.END_OF_WINDOW, |
| 562 | (int)ack_nack->EGPRS_AckNack.Desc.STARTING_SEQUENCE_NUMBER, |
| 563 | (int)ack_nack->EGPRS_AckNack.Desc.Exist_CRBB, |
| 564 | (int)ack_nack->EGPRS_AckNack.Desc.URBB_LENGTH, |
| 565 | (void *)&ack_nack->EGPRS_AckNack.UnionType, |
| 566 | (void *)&ack_nack->EGPRS_AckNack.Desc, |
| 567 | (int)offsetof(EGPRS_AckNack_t, Desc), |
| 568 | (int)offsetof(EGPRS_AckNack_w_len_t, Desc), |
Pau Espin Pedrol | b3f2397 | 2020-10-23 21:00:23 +0200 | [diff] [blame] | 569 | window->v_a(), |
| 570 | window->v_s(), |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 571 | osmo_hexdump((const uint8_t *)&ack_nack->EGPRS_AckNack.Desc.URBB, |
| 572 | sizeof(ack_nack->EGPRS_AckNack.Desc.URBB))); |
| 573 | |
| 574 | bits.data = bits_data; |
| 575 | bits.data_len = sizeof(bits_data); |
| 576 | bits.cur_bit = 0; |
| 577 | |
| 578 | num_blocks = Decoding::decode_egprs_acknack_bits( |
| 579 | &ack_nack->EGPRS_AckNack.Desc, &bits, |
Pau Espin Pedrol | b3f2397 | 2020-10-23 21:00:23 +0200 | [diff] [blame] | 580 | &bsn_begin, &bsn_end, window); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 581 | |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 582 | LOGPDCH(this, DRLCMAC, LOGL_DEBUG, |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 583 | "Got EGPRS DL ACK bitmap: SSN: %d, BSN %d to %d - 1 (%d blocks), " |
| 584 | "\"%s\"\n", |
| 585 | ack_nack->EGPRS_AckNack.Desc.STARTING_SEQUENCE_NUMBER, |
| 586 | bsn_begin, bsn_end, num_blocks, |
| 587 | (Decoding::extract_rbb(&bits, show_bits), show_bits) |
| 588 | ); |
| 589 | |
| 590 | rc = tbf->rcvd_dl_ack( |
| 591 | ack_nack->EGPRS_AckNack.Desc.FINAL_ACK_INDICATION, |
| 592 | bsn_begin, &bits); |
| 593 | if (rc == 1) { |
| 594 | tbf_free(tbf); |
| 595 | return; |
| 596 | } |
| 597 | |
| 598 | /* check for channel request */ |
| 599 | if (ack_nack->Exist_ChannelRequestDescription) |
Pau Espin Pedrol | 0ece97d | 2021-01-18 12:53:54 +0100 | [diff] [blame] | 600 | sched_ul_ass_or_rej(bts(), tbf); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 601 | |
| 602 | /* get measurements */ |
| 603 | if (tbf->ms()) { |
| 604 | /* TODO: Implement Measurements parsing for EGPRS */ |
| 605 | /* |
Pau Espin Pedrol | e13cdc5 | 2019-09-25 13:46:14 +0200 | [diff] [blame] | 606 | get_meas(meas, &ack_nack->Channel_Quality_Report); |
| 607 | tbf->ms()->update_l1_meas(meas); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 608 | */ |
| 609 | } |
| 610 | } |
| 611 | |
Pau Espin Pedrol | e13cdc5 | 2019-09-25 13:46:14 +0200 | [diff] [blame] | 612 | 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] | 613 | { |
| 614 | struct gprs_rlcmac_sba *sba; |
Pau Espin Pedrol | 7a2b65e | 2021-10-11 19:18:13 +0200 | [diff] [blame] | 615 | int rc; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 616 | |
| 617 | if (request->ID.UnionType) { |
Pau Espin Pedrol | 4347997 | 2021-04-22 19:18:13 +0200 | [diff] [blame] | 618 | struct gprs_rlcmac_ul_tbf *ul_tbf = NULL; |
| 619 | struct pdch_ulc_node *item; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 620 | uint32_t tlli = request->ID.u.TLLI; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 621 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 622 | GprsMs *ms = bts_ms_by_tlli(bts(), tlli, GSM_RESERVED_TMSI); |
Pau Espin Pedrol | ce60011 | 2020-05-12 19:20:10 +0200 | [diff] [blame] | 623 | if (!ms) { |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 624 | ms = bts_alloc_ms(bts(), 0, 0); /* ms class updated later */ |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 625 | ms_set_tlli(ms, tlli); |
Pau Espin Pedrol | ce60011 | 2020-05-12 19:20:10 +0200 | [diff] [blame] | 626 | } |
Pau Espin Pedrol | 17402a5 | 2020-05-08 17:44:33 +0200 | [diff] [blame] | 627 | |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 628 | /* Keep the ms, even if it gets idle temporarily */ |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 629 | ms_ref(ms); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 630 | |
Pau Espin Pedrol | 4347997 | 2021-04-22 19:18:13 +0200 | [diff] [blame] | 631 | if (!(item = pdch_ulc_get_node(ulc, fn))) { |
| 632 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, "FN=%u PKT RESOURCE REQ: " |
| 633 | "UL block not reserved\n", fn); |
| 634 | goto return_unref; |
| 635 | } |
| 636 | |
| 637 | switch (item->type) { |
Pau Espin Pedrol | 201dbe0 | 2021-10-11 19:04:24 +0200 | [diff] [blame] | 638 | case PDCH_ULC_NODE_TBF_USF: |
| 639 | /* Is it actually valid for an MS to send a PKT Res Req during USF? */ |
| 640 | ul_tbf = item->tbf_usf.ul_tbf; |
| 641 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, "FN=%u PKT RESOURCE REQ: " |
| 642 | "Unexpectedly received, waiting USF of %s\n", |
| 643 | fn, tbf_name(item->tbf_usf.ul_tbf)); |
| 644 | /* Ignore it, let common path expire related ULC entry */ |
| 645 | goto return_unref; |
Pau Espin Pedrol | 4347997 | 2021-04-22 19:18:13 +0200 | [diff] [blame] | 646 | case PDCH_ULC_NODE_SBA: |
| 647 | sba = item->sba.sba; |
| 648 | LOGPDCH(this, DRLCMAC, LOGL_DEBUG, "FN=%u PKT RESOURCE REQ: " |
| 649 | "MS requests UL TBF throguh SBA\n", fn); |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 650 | ms_set_ta(ms, sba->ta); |
Pau Espin Pedrol | 15c58ac | 2021-03-08 14:57:58 +0100 | [diff] [blame] | 651 | sba_free(sba); |
Pau Espin Pedrol | 4347997 | 2021-04-22 19:18:13 +0200 | [diff] [blame] | 652 | break; |
| 653 | case PDCH_ULC_NODE_TBF_POLL: |
| 654 | if (item->tbf_poll.poll_tbf->direction != GPRS_RLCMAC_UL_TBF) { |
| 655 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, "FN=%u PKT RESOURCE REQ: " |
| 656 | "Unexpectedly received for DL TBF %s\n", fn, |
| 657 | tbf_name(item->tbf_poll.poll_tbf)); |
| 658 | /* let common path expire the poll */ |
| 659 | goto return_unref; |
| 660 | } |
| 661 | ul_tbf = (struct gprs_rlcmac_ul_tbf *)item->tbf_poll.poll_tbf; |
| 662 | if (item->tbf_poll.reason != PDCH_ULC_POLL_UL_ACK) { |
| 663 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, "FN=%u PKT RESOURCE REQ: " |
| 664 | "Unexpectedly received, waiting for poll reason %d\n", |
| 665 | fn, item->tbf_poll.reason); |
| 666 | /* let common path expire the poll */ |
| 667 | goto return_unref; |
| 668 | } |
| 669 | if (ul_tbf != ms_ul_tbf(ms)) { |
| 670 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, "FN=%u PKT RESOURCE REQ: " |
| 671 | "Unexpected TLLI 0x%08x received vs exp 0x%08x\n", |
| 672 | fn, tlli, ul_tbf->tlli()); |
| 673 | /* let common path expire the poll */ |
| 674 | goto return_unref; |
| 675 | } |
| 676 | /* 3GPP TS 44.060 $ 9.3.3.3 */ |
| 677 | LOGPTBFUL(ul_tbf, LOGL_DEBUG, "FN=%u PKT RESOURCE REQ: " |
| 678 | "MS requests reuse of finished UL TBF in RRBP " |
| 679 | "block of final UL ACK/NACK\n", fn); |
| 680 | ul_tbf->n_reset(N3103); |
| 681 | pdch_ulc_release_node(ulc, item); |
Pau Espin Pedrol | 7a2b65e | 2021-10-11 19:18:13 +0200 | [diff] [blame] | 682 | rc = osmo_fsm_inst_dispatch(ul_tbf->state_fsm.fi, TBF_EV_FINAL_UL_ACK_CONFIRMED, NULL); |
| 683 | if (rc) { |
| 684 | /* FSM failed handling, get rid of previous finished UL TBF before providing a new one */ |
| 685 | LOGPTBFUL(ul_tbf, LOGL_NOTICE, |
| 686 | "Got PACKET RESOURCE REQ while TBF not finished, killing pending UL TBF\n"); |
| 687 | tbf_free(ul_tbf); |
| 688 | } /* else: ul_tbf has been freed by state_fsm */ |
| 689 | ul_tbf = NULL; |
Pau Espin Pedrol | 4347997 | 2021-04-22 19:18:13 +0200 | [diff] [blame] | 690 | break; |
Pau Espin Pedrol | 4347997 | 2021-04-22 19:18:13 +0200 | [diff] [blame] | 691 | default: |
| 692 | OSMO_ASSERT(0); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 693 | } |
Pau Espin Pedrol | 4347997 | 2021-04-22 19:18:13 +0200 | [diff] [blame] | 694 | |
Pau Espin Pedrol | 7a2b65e | 2021-10-11 19:18:13 +0200 | [diff] [blame] | 695 | /* Here ul_tbf is NULL: |
| 696 | * - SBA case: no previous TBF) and in |
| 697 | * - POLL case: PktResReq is a final ACk confirmation and ul_tbf was freed |
| 698 | */ |
Pau Espin Pedrol | 9e7361a | 2020-07-08 17:35:12 +0200 | [diff] [blame] | 699 | |
Pau Espin Pedrol | e50ce6e | 2020-03-23 18:49:16 +0100 | [diff] [blame] | 700 | if (request->Exist_MS_Radio_Access_capability2) { |
Pau Espin Pedrol | 17402a5 | 2020-05-08 17:44:33 +0200 | [diff] [blame] | 701 | uint8_t ms_class, egprs_ms_class; |
Pau Espin Pedrol | 8a35e64 | 2021-01-18 17:14:14 +0100 | [diff] [blame] | 702 | ms_class = get_ms_class_by_capability(&request->MS_Radio_Access_capability2); |
| 703 | 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] | 704 | if (ms_class) |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 705 | ms_set_ms_class(ms, ms_class); |
Pau Espin Pedrol | bcb226d | 2020-07-08 17:18:22 +0200 | [diff] [blame] | 706 | if (egprs_ms_class) |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 707 | ms_set_egprs_ms_class(ms, egprs_ms_class); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 708 | } |
Pau Espin Pedrol | 17402a5 | 2020-05-08 17:44:33 +0200 | [diff] [blame] | 709 | |
Pau Espin Pedrol | 5922396 | 2021-10-18 12:24:38 +0200 | [diff] [blame] | 710 | ul_tbf = tbf_alloc_ul_pacch(bts(), ms, trx_no()); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 711 | if (!ul_tbf) { |
Pau Espin Pedrol | 54742f2 | 2021-04-26 16:48:34 +0200 | [diff] [blame] | 712 | handle_tbf_reject(bts(), ms, trx_no(), ts_no); |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 713 | goto return_unref; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 714 | } |
| 715 | |
Pau Espin Pedrol | ffe998c | 2021-10-12 19:32:28 +0200 | [diff] [blame] | 716 | /* Set control TS to the TS where this PktResReq was received, |
| 717 | * which in practice happens to be the control_ts from the |
| 718 | * previous UL-TBF or SBA. When CTRL ACK is received as RRBP of the Pkt |
| 719 | * UL Ass scheduled below, then TBF_EV_ASSIGN_ACK_PACCH will be |
| 720 | * sent to tbf_fsm which will call tbf_assign_control_ts(), |
| 721 | * effectively setting back control_ts to |
| 722 | * tbf->initial_common_ts. */ |
Pau Espin Pedrol | 506eb23 | 2019-12-24 13:02:48 +0100 | [diff] [blame] | 723 | 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] | 724 | ul_tbf->control_ts, ts_no); |
| 725 | |
| 726 | ul_tbf->control_ts = ts_no; |
| 727 | /* schedule uplink assignment */ |
Pau Espin Pedrol | 6ad11a6 | 2021-07-27 12:27:08 +0200 | [diff] [blame] | 728 | 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] | 729 | |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 730 | /* get measurements */ |
Pau Espin Pedrol | 4347997 | 2021-04-22 19:18:13 +0200 | [diff] [blame] | 731 | get_meas(meas, request); |
| 732 | ms_update_l1_meas(ul_tbf->ms(), meas); |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 733 | return_unref: |
| 734 | ms_unref(ms); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 735 | return; |
| 736 | } |
| 737 | |
| 738 | if (request->ID.u.Global_TFI.UnionType) { |
| 739 | struct gprs_rlcmac_dl_tbf *dl_tbf; |
| 740 | int8_t tfi = request->ID.u.Global_TFI.u.DOWNLINK_TFI; |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 741 | dl_tbf = bts_dl_tbf_by_tfi(bts(), tfi, trx_no(), ts_no); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 742 | if (!dl_tbf) { |
Thorsten Alteholz | 8bb7904 | 2018-10-06 10:42:58 +0200 | [diff] [blame] | 743 | LOGP(DRLCMAC, LOGL_NOTICE, "PACKET RESOURCE REQ unknown downlink TFI=%d\n", tfi); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 744 | return; |
| 745 | } |
| 746 | LOGPTBFDL(dl_tbf, LOGL_ERROR, |
| 747 | "RX: [PCU <- BTS] FIXME: Packet resource request\n"); |
| 748 | |
| 749 | /* Reset N3101 counter: */ |
Max | 847ed9f | 2018-02-20 18:16:11 +0100 | [diff] [blame] | 750 | dl_tbf->n_reset(N3101); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 751 | } else { |
| 752 | struct gprs_rlcmac_ul_tbf *ul_tbf; |
| 753 | int8_t tfi = request->ID.u.Global_TFI.u.UPLINK_TFI; |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 754 | ul_tbf = bts_ul_tbf_by_tfi(bts(), tfi, trx_no(), ts_no); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 755 | if (!ul_tbf) { |
Thorsten Alteholz | 8bb7904 | 2018-10-06 10:42:58 +0200 | [diff] [blame] | 756 | LOGP(DRLCMAC, LOGL_NOTICE, "PACKET RESOURCE REQ unknown uplink TFI=%d\n", tfi); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 757 | return; |
| 758 | } |
| 759 | LOGPTBFUL(ul_tbf, LOGL_ERROR, |
| 760 | "RX: [PCU <- BTS] FIXME: Packet resource request\n"); |
| 761 | |
| 762 | /* Reset N3101 counter: */ |
Max | 847ed9f | 2018-02-20 18:16:11 +0100 | [diff] [blame] | 763 | ul_tbf->n_reset(N3101); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 764 | } |
| 765 | } |
| 766 | |
| 767 | void gprs_rlcmac_pdch::rcv_measurement_report(Packet_Measurement_Report_t *report, uint32_t fn) |
| 768 | { |
Pau Espin Pedrol | b69928c | 2020-08-18 20:29:40 +0200 | [diff] [blame] | 769 | struct gprs_rlcmac_sba *sba; |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 770 | struct pdch_ulc_node *poll; |
Pau Espin Pedrol | b69928c | 2020-08-18 20:29:40 +0200 | [diff] [blame] | 771 | GprsMs *ms; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 772 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 773 | ms = bts_ms_by_tlli(bts(), report->TLLI, GSM_RESERVED_TMSI); |
Pau Espin Pedrol | b69928c | 2020-08-18 20:29:40 +0200 | [diff] [blame] | 774 | if (!ms) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 775 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, "MS send measurement " |
| 776 | "but TLLI 0x%08x is unknown\n", report->TLLI); |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 777 | ms = bts_alloc_ms(bts(), 0, 0); |
Pau Espin Pedrol | da971ee | 2020-12-16 15:59:45 +0100 | [diff] [blame] | 778 | ms_set_tlli(ms, report->TLLI); |
Pau Espin Pedrol | b69928c | 2020-08-18 20:29:40 +0200 | [diff] [blame] | 779 | } |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 780 | if ((poll = pdch_ulc_get_node(ulc, fn))) { |
| 781 | switch (poll->type) { |
| 782 | case PDCH_ULC_NODE_TBF_USF: |
Pau Espin Pedrol | c1f38c7 | 2021-03-24 14:06:15 +0100 | [diff] [blame] | 783 | pdch_ulc_release_fn(ulc, fn); |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 784 | break; |
| 785 | case PDCH_ULC_NODE_TBF_POLL: |
| 786 | LOGPDCH(this, DRLCMAC, LOGL_INFO, "FN=%" PRIu32 " Rx Meas Report " |
| 787 | "on RRBP POLL, this probably means a DL/CTRL ACK/NACk will " |
| 788 | "need to be polled again later\n", fn); |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 789 | pdch_ulc_release_fn(ulc, fn); |
| 790 | break; |
| 791 | case PDCH_ULC_NODE_SBA: |
| 792 | sba = poll->sba.sba; |
| 793 | ms_set_ta(ms, sba->ta); |
| 794 | sba_free(sba); |
| 795 | break; |
| 796 | } |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 797 | } |
Pau Espin Pedrol | b69928c | 2020-08-18 20:29:40 +0200 | [diff] [blame] | 798 | gprs_rlcmac_meas_rep(ms, report); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 799 | } |
| 800 | |
Pau Espin Pedrol | c0a250d | 2021-01-21 18:46:13 +0100 | [diff] [blame] | 801 | void gprs_rlcmac_pdch::rcv_cell_change_notification(Packet_Cell_Change_Notification_t *notif, |
| 802 | uint32_t fn, struct pcu_l1_meas *meas) |
| 803 | { |
| 804 | GprsMs *ms; |
| 805 | |
| 806 | bts_do_rate_ctr_inc(bts(), CTR_PKT_CELL_CHG_NOTIFICATION); |
| 807 | |
| 808 | if (notif->Global_TFI.UnionType == 0) { |
| 809 | struct gprs_rlcmac_ul_tbf *ul_tbf = ul_tbf_by_tfi(notif->Global_TFI.u.UPLINK_TFI); |
| 810 | if (!ul_tbf) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 811 | 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] | 812 | return; |
| 813 | } |
| 814 | ms = ul_tbf->ms(); |
| 815 | } else if (notif->Global_TFI.UnionType == 1) { |
| 816 | struct gprs_rlcmac_dl_tbf *dl_tbf = dl_tbf_by_tfi(notif->Global_TFI.u.DOWNLINK_TFI); |
| 817 | if (!dl_tbf) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 818 | 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] | 819 | return; |
| 820 | } |
| 821 | ms = dl_tbf->ms(); |
| 822 | } else { OSMO_ASSERT(0); } |
| 823 | |
Pau Espin Pedrol | 9a6f0b1 | 2021-03-24 14:05:04 +0100 | [diff] [blame] | 824 | pdch_ulc_release_fn(ulc, fn); |
| 825 | |
Pau Espin Pedrol | c0a250d | 2021-01-21 18:46:13 +0100 | [diff] [blame] | 826 | ms_update_l1_meas(ms, meas); |
| 827 | ms_nacc_start(ms, notif); |
| 828 | } |
| 829 | |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 830 | /* Received Uplink RLC control block. */ |
Pau Espin Pedrol | 812d466 | 2019-09-25 13:35:11 +0200 | [diff] [blame] | 831 | 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] | 832 | uint32_t fn, struct pcu_l1_meas *meas, enum CodingScheme cs) |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 833 | { |
Pau Espin Pedrol | 812d466 | 2019-09-25 13:35:11 +0200 | [diff] [blame] | 834 | bitvec *rlc_block; |
| 835 | RlcMacUplink_t *ul_control_block; |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 836 | unsigned len = mcs_max_bytes_ul(cs); |
Pau Espin Pedrol | 5e300ce | 2020-02-03 17:18:03 +0100 | [diff] [blame] | 837 | int rc; |
Pau Espin Pedrol | 812d466 | 2019-09-25 13:35:11 +0200 | [diff] [blame] | 838 | |
| 839 | if (!(rlc_block = bitvec_alloc(len, tall_pcu_ctx))) |
| 840 | return -ENOMEM; |
| 841 | bitvec_unpack(rlc_block, data); |
| 842 | ul_control_block = (RlcMacUplink_t *)talloc_zero(tall_pcu_ctx, RlcMacUplink_t); |
| 843 | |
Pau Espin Pedrol | 68bfdff | 2021-03-09 20:19:51 +0100 | [diff] [blame] | 844 | LOGPDCH(this, DRLCMAC, LOGL_DEBUG, "FN=%u +++++++++++++++++++++++++ RX : Uplink Control Block +++++++++++++++++++++++++\n", fn); |
Keith | 6fd8ffb | 2020-03-05 19:48:24 -0600 | [diff] [blame] | 845 | |
Keith | 2b6acd8 | 2020-03-26 16:33:59 -0500 | [diff] [blame] | 846 | rc = decode_gsm_rlcmac_uplink(rlc_block, ul_control_block); |
Keith | 6fd8ffb | 2020-03-05 19:48:24 -0600 | [diff] [blame] | 847 | 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] | 848 | 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] | 849 | else |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 850 | 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] | 851 | |
Pau Espin Pedrol | 16705a4 | 2020-10-27 10:24:57 +0100 | [diff] [blame] | 852 | if (rc < 0) { |
Pau Espin Pedrol | 68bfdff | 2021-03-09 20:19:51 +0100 | [diff] [blame] | 853 | LOGPDCH(this, DRLCMACUL, LOGL_ERROR, "FN=%u Dropping Uplink Control Block " |
| 854 | "with invalid content, decode failed: %d)\n", fn, rc); |
Pau Espin Pedrol | 5e300ce | 2020-02-03 17:18:03 +0100 | [diff] [blame] | 855 | goto free_ret; |
| 856 | } |
Pau Espin Pedrol | 68bfdff | 2021-03-09 20:19:51 +0100 | [diff] [blame] | 857 | LOGPDCH(this, DRLCMAC, LOGL_DEBUG, "FN=%u ------------------------- RX : Uplink Control Block -------------------------\n", fn); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 858 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 859 | bts_do_rate_ctr_inc(bts(), CTR_RLC_RECV_CONTROL); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 860 | switch (ul_control_block->u.MESSAGE_TYPE) { |
| 861 | case MT_PACKET_CONTROL_ACK: |
| 862 | rcv_control_ack(&ul_control_block->u.Packet_Control_Acknowledgement, fn); |
| 863 | break; |
| 864 | case MT_PACKET_DOWNLINK_ACK_NACK: |
Pau Espin Pedrol | e13cdc5 | 2019-09-25 13:46:14 +0200 | [diff] [blame] | 865 | 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] | 866 | break; |
| 867 | case MT_EGPRS_PACKET_DOWNLINK_ACK_NACK: |
Pau Espin Pedrol | e13cdc5 | 2019-09-25 13:46:14 +0200 | [diff] [blame] | 868 | 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] | 869 | break; |
| 870 | case MT_PACKET_RESOURCE_REQUEST: |
Pau Espin Pedrol | e13cdc5 | 2019-09-25 13:46:14 +0200 | [diff] [blame] | 871 | rcv_resource_request(&ul_control_block->u.Packet_Resource_Request, fn, meas); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 872 | break; |
| 873 | case MT_PACKET_MEASUREMENT_REPORT: |
| 874 | rcv_measurement_report(&ul_control_block->u.Packet_Measurement_Report, fn); |
| 875 | break; |
| 876 | case MT_PACKET_UPLINK_DUMMY_CONTROL_BLOCK: |
| 877 | /* ignoring it. change the SI to not force sending these? */ |
| 878 | break; |
Pau Espin Pedrol | c0a250d | 2021-01-21 18:46:13 +0100 | [diff] [blame] | 879 | case MT_PACKET_CELL_CHANGE_NOTIFICATION: |
| 880 | rcv_cell_change_notification(&ul_control_block->u.Packet_Cell_Change_Notification, fn, meas); |
| 881 | break; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 882 | default: |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 883 | bts_do_rate_ctr_inc(bts(), CTR_DECODE_ERRORS); |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 884 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, |
Pau Espin Pedrol | 68bfdff | 2021-03-09 20:19:51 +0100 | [diff] [blame] | 885 | "FN=%u RX: [PCU <- BTS] unknown control block(%d) received\n", |
| 886 | fn, ul_control_block->u.MESSAGE_TYPE); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 887 | } |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 888 | |
Pau Espin Pedrol | 5e300ce | 2020-02-03 17:18:03 +0100 | [diff] [blame] | 889 | free_ret: |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 890 | talloc_free(ul_control_block); |
Pau Espin Pedrol | 812d466 | 2019-09-25 13:35:11 +0200 | [diff] [blame] | 891 | bitvec_free(rlc_block); |
Pau Espin Pedrol | 5e300ce | 2020-02-03 17:18:03 +0100 | [diff] [blame] | 892 | return rc; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 893 | } |
| 894 | |
| 895 | /* received RLC/MAC block from L1 */ |
| 896 | int gprs_rlcmac_pdch::rcv_block(uint8_t *data, uint8_t len, uint32_t fn, |
| 897 | struct pcu_l1_meas *meas) |
| 898 | { |
Pau Espin Pedrol | 3061711 | 2021-03-05 18:59:05 +0100 | [diff] [blame] | 899 | /* First of all, update TDMA clock: */ |
| 900 | bts_set_current_frame_number(trx->bts, fn); |
| 901 | |
Pau Espin Pedrol | 3cba94d | 2021-03-05 18:54:01 +0100 | [diff] [blame] | 902 | /* No successfully decoded UL block was received during this FN: */ |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 903 | if (len == 0) |
Pau Espin Pedrol | 3cba94d | 2021-03-05 18:54:01 +0100 | [diff] [blame] | 904 | return 0; |
Pau Espin Pedrol | 3cba94d | 2021-03-05 18:54:01 +0100 | [diff] [blame] | 905 | |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 906 | enum CodingScheme cs = mcs_get_by_size_ul(len); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 907 | if (!cs) { |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 908 | bts_do_rate_ctr_inc(bts(), CTR_DECODE_ERRORS); |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 909 | LOGPDCH(this, DRLCMACUL, LOGL_ERROR, "Dropping data block with invalid " |
| 910 | "length %d: %s\n", len, osmo_hexdump(data, len)); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 911 | return -EINVAL; |
| 912 | } |
| 913 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 914 | bts_do_rate_ctr_add(bts(), CTR_RLC_UL_BYTES, len); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 915 | |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 916 | LOGPDCH(this, DRLCMACUL, LOGL_DEBUG, "Got RLC block, coding scheme: %s, " |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 917 | "length: %d (%d))\n", mcs_name(cs), len, mcs_used_size_ul(cs)); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 918 | |
Max | 8a8e0fb | 2019-03-25 16:32:50 +0100 | [diff] [blame] | 919 | if (mcs_is_gprs(cs)) |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 920 | return rcv_block_gprs(data, len, fn, meas, cs); |
| 921 | |
Max | 8a8e0fb | 2019-03-25 16:32:50 +0100 | [diff] [blame] | 922 | if (mcs_is_edge(cs)) |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 923 | return rcv_data_block(data, len, fn, meas, cs); |
| 924 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 925 | bts_do_rate_ctr_inc(bts(), CTR_DECODE_ERRORS); |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 926 | LOGPDCH(this, DRLCMACUL, LOGL_ERROR, "Unsupported coding scheme %s\n", |
Max | 136ebcc | 2019-03-05 14:59:03 +0100 | [diff] [blame] | 927 | mcs_name(cs)); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 928 | return -EINVAL; |
| 929 | } |
| 930 | |
| 931 | /*! \brief process egprs and gprs data blocks */ |
| 932 | 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] | 933 | struct pcu_l1_meas *meas, enum CodingScheme cs) |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 934 | { |
| 935 | int rc; |
| 936 | struct gprs_rlc_data_info rlc_dec; |
| 937 | struct gprs_rlcmac_ul_tbf *tbf; |
Pau Espin Pedrol | c1f38c7 | 2021-03-24 14:06:15 +0100 | [diff] [blame] | 938 | struct pdch_ulc_node *node; |
Pau Espin Pedrol | 2ae8337 | 2020-05-18 11:35:35 +0200 | [diff] [blame] | 939 | unsigned len = mcs_size_ul(cs); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 940 | |
| 941 | /* These are always data blocks, since EGPRS still uses CS-1 for |
| 942 | * control blocks (see 44.060, section 10.3, 1st par.) |
| 943 | */ |
Max | 8a8e0fb | 2019-03-25 16:32:50 +0100 | [diff] [blame] | 944 | if (mcs_is_edge(cs)) { |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 945 | 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] | 946 | trx_no(), ts_no, GSMTAP_CHANNEL_PDTCH, fn, |
| 947 | data, data_len, meas); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 948 | } else { |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 949 | 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] | 950 | trx_no(), ts_no, GSMTAP_CHANNEL_PDTCH, fn, |
| 951 | data, data_len, meas); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 952 | } |
| 953 | |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 954 | LOGPDCH(this, DRLCMACUL, LOGL_DEBUG, " UL data: %s\n", osmo_hexdump(data, len)); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 955 | |
| 956 | rc = Decoding::rlc_parse_ul_data_header(&rlc_dec, data, cs); |
| 957 | if (rc < 0) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 958 | LOGPDCH(this, DRLCMACUL, LOGL_ERROR, |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 959 | "Got %s RLC block but header parsing has failed\n", |
Max | 136ebcc | 2019-03-05 14:59:03 +0100 | [diff] [blame] | 960 | mcs_name(cs)); |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 961 | bts_do_rate_ctr_inc(bts(), CTR_DECODE_ERRORS); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 962 | return rc; |
| 963 | } |
| 964 | |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 965 | LOGPDCH(this, DRLCMACUL, LOGL_INFO, |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 966 | "Got %s RLC block: " |
| 967 | "R=%d, SI=%d, TFI=%d, CPS=%d, RSB=%d, " |
| 968 | "rc=%d\n", |
Max | 136ebcc | 2019-03-05 14:59:03 +0100 | [diff] [blame] | 969 | mcs_name(cs), |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 970 | rlc_dec.r, rlc_dec.si, rlc_dec.tfi, rlc_dec.cps, rlc_dec.rsb, |
| 971 | rc); |
| 972 | |
| 973 | /* find TBF inst from given TFI */ |
| 974 | tbf = ul_tbf_by_tfi(rlc_dec.tfi); |
| 975 | if (!tbf) { |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 976 | LOGPDCH(this, DRLCMACUL, LOGL_NOTICE, "UL DATA unknown TFI=%d\n", |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 977 | rlc_dec.tfi); |
| 978 | return 0; |
| 979 | } |
| 980 | |
Pau Espin Pedrol | c1f38c7 | 2021-03-24 14:06:15 +0100 | [diff] [blame] | 981 | node = pdch_ulc_get_node(ulc, fn); |
| 982 | if (node) { |
| 983 | switch (node->type) { |
| 984 | case PDCH_ULC_NODE_TBF_USF: |
Pau Espin Pedrol | ffa2918 | 2021-10-12 20:05:37 +0200 | [diff] [blame] | 985 | if (tbf == node->tbf_usf.ul_tbf) |
| 986 | pdch_ulc_release_node(ulc, node); |
| 987 | else |
Pau Espin Pedrol | c1f38c7 | 2021-03-24 14:06:15 +0100 | [diff] [blame] | 988 | LOGPDCH(this, DRLCMACUL, LOGL_NOTICE, "FN=%" PRIu32 " " |
| 989 | "Rx UL DATA from unexpected %s vs expected %s\n", |
| 990 | fn, tbf_name(tbf), tbf_name(node->tbf_usf.ul_tbf)); |
| 991 | break; |
| 992 | case PDCH_ULC_NODE_TBF_POLL: |
| 993 | LOGPDCH(this, DRLCMACUL, LOGL_NOTICE, "FN=%" PRIu32 " " |
Pau Espin Pedrol | 196f36b | 2021-10-18 12:37:51 +0200 | [diff] [blame] | 994 | "Rx UL DATA from unexpected %s vs expected POLL %s reason=%s\n", |
| 995 | fn, tbf_name(tbf), tbf_name(node->tbf_poll.poll_tbf), |
| 996 | get_value_string(pdch_ulc_tbf_poll_reason_names, node->tbf_poll.reason)); |
Pau Espin Pedrol | c1f38c7 | 2021-03-24 14:06:15 +0100 | [diff] [blame] | 997 | break; |
| 998 | case PDCH_ULC_NODE_SBA: |
| 999 | LOGPDCH(this, DRLCMACUL, LOGL_NOTICE, "FN=%" PRIu32 " " |
| 1000 | "Rx UL DATA from unexpected %s vs expected SBA\n", |
| 1001 | fn, tbf_name(tbf)); |
| 1002 | break; |
| 1003 | } |
Pau Espin Pedrol | c1f38c7 | 2021-03-24 14:06:15 +0100 | [diff] [blame] | 1004 | } else { |
| 1005 | LOGPDCH(this, DRLCMACUL, LOGL_NOTICE, "FN=%" PRIu32 " " |
| 1006 | "Rx UL DATA from unexpected %s\n", fn, tbf_name(tbf)); |
| 1007 | } |
| 1008 | |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1009 | /* Reset N3101 counter: */ |
Max | 847ed9f | 2018-02-20 18:16:11 +0100 | [diff] [blame] | 1010 | tbf->n_reset(N3101); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1011 | |
| 1012 | return tbf->rcv_data_block_acknowledged(&rlc_dec, data, meas); |
| 1013 | } |
| 1014 | |
| 1015 | 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] | 1016 | struct pcu_l1_meas *meas, enum CodingScheme cs) |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1017 | { |
| 1018 | unsigned payload = data[0] >> 6; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1019 | int rc = 0; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1020 | |
| 1021 | switch (payload) { |
| 1022 | case GPRS_RLCMAC_DATA_BLOCK: |
| 1023 | rc = rcv_data_block(data, data_len, fn, meas, cs); |
| 1024 | break; |
| 1025 | case GPRS_RLCMAC_CONTROL_BLOCK: |
Pau Espin Pedrol | e13cdc5 | 2019-09-25 13:46:14 +0200 | [diff] [blame] | 1026 | rc = rcv_control_block(data, data_len, fn, meas, cs); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1027 | break; |
| 1028 | case GPRS_RLCMAC_CONTROL_BLOCK_OPT: |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 1029 | 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] | 1030 | break; |
| 1031 | default: |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 1032 | LOGPDCH(this, DRLCMAC, LOGL_NOTICE, "Unknown RLCMAC block payload(%u).\n", payload); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1033 | rc = -EINVAL; |
| 1034 | } |
| 1035 | |
| 1036 | return rc; |
| 1037 | } |
| 1038 | |
| 1039 | gprs_rlcmac_tbf *gprs_rlcmac_pdch::tbf_from_list_by_tfi( |
| 1040 | LListHead<gprs_rlcmac_tbf> *tbf_list, uint8_t tfi, |
| 1041 | enum gprs_rlcmac_tbf_direction dir) |
| 1042 | { |
| 1043 | gprs_rlcmac_tbf *tbf; |
| 1044 | LListHead<gprs_rlcmac_tbf> *pos; |
| 1045 | |
| 1046 | llist_for_each(pos, tbf_list) { |
| 1047 | tbf = pos->entry(); |
| 1048 | if (tbf->tfi() != tfi) |
| 1049 | continue; |
| 1050 | if (!tbf->pdch[ts_no]) |
| 1051 | continue; |
| 1052 | return tbf; |
| 1053 | } |
| 1054 | return NULL; |
| 1055 | } |
| 1056 | |
| 1057 | gprs_rlcmac_ul_tbf *gprs_rlcmac_pdch::ul_tbf_by_tfi(uint8_t tfi) |
| 1058 | { |
| 1059 | return as_ul_tbf(tbf_by_tfi(tfi, GPRS_RLCMAC_UL_TBF)); |
| 1060 | } |
| 1061 | |
| 1062 | gprs_rlcmac_dl_tbf *gprs_rlcmac_pdch::dl_tbf_by_tfi(uint8_t tfi) |
| 1063 | { |
| 1064 | return as_dl_tbf(tbf_by_tfi(tfi, GPRS_RLCMAC_DL_TBF)); |
| 1065 | } |
| 1066 | |
| 1067 | /* lookup TBF Entity (by TFI) */ |
| 1068 | gprs_rlcmac_tbf *gprs_rlcmac_pdch::tbf_by_tfi(uint8_t tfi, |
| 1069 | enum gprs_rlcmac_tbf_direction dir) |
| 1070 | { |
| 1071 | struct gprs_rlcmac_tbf *tbf; |
| 1072 | |
| 1073 | if (tfi >= 32) |
| 1074 | return NULL; |
| 1075 | |
| 1076 | tbf = m_tbfs[dir][tfi]; |
| 1077 | |
Pau Espin Pedrol | 710e0e9 | 2021-04-22 21:03:33 +0200 | [diff] [blame] | 1078 | return tbf; |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1079 | } |
| 1080 | |
Oliver Smith | 402451b | 2021-09-08 09:33:24 +0200 | [diff] [blame] | 1081 | void gprs_rlcmac_pdch::num_tbfs_update(gprs_rlcmac_tbf *tbf, bool is_attach) |
| 1082 | { |
| 1083 | int threshold = is_attach ? 0 : 1; |
| 1084 | int inc = is_attach ? 1 : -1; |
| 1085 | uint8_t ul_dl_gprs = m_num_tbfs_gprs[GPRS_RLCMAC_UL_TBF] + |
| 1086 | m_num_tbfs_gprs[GPRS_RLCMAC_DL_TBF]; |
| 1087 | uint8_t ul_dl_egprs = m_num_tbfs_egprs[GPRS_RLCMAC_UL_TBF] + |
| 1088 | m_num_tbfs_egprs[GPRS_RLCMAC_DL_TBF]; |
| 1089 | |
| 1090 | /* Count PDCHs with at least one TBF as "occupied", as in |
| 1091 | * 3GPP TS 52.402 § B.2.1.42-44. So if transitioning from 0 (threshold) |
| 1092 | * TBFs in this PDCH to 1, increase the counter by 1 (inc). */ |
| 1093 | if (ul_dl_gprs + ul_dl_egprs == threshold) |
| 1094 | bts_stat_item_add(trx->bts, STAT_PDCH_OCCUPIED, inc); |
| 1095 | |
| 1096 | /* Update occupied GPRS/EGPRS stats (§ B.2.1.54-55) too */ |
| 1097 | if (tbf->is_egprs_enabled() && ul_dl_egprs == threshold) |
| 1098 | bts_stat_item_add(trx->bts, STAT_PDCH_OCCUPIED_EGPRS, inc); |
| 1099 | else if (!tbf->is_egprs_enabled() && ul_dl_gprs == threshold) |
| 1100 | bts_stat_item_add(trx->bts, STAT_PDCH_OCCUPIED_GPRS, inc); |
| 1101 | |
| 1102 | if (tbf->is_egprs_enabled()) |
| 1103 | m_num_tbfs_egprs[tbf->direction] += inc; |
| 1104 | else |
| 1105 | m_num_tbfs_gprs[tbf->direction] += inc; |
| 1106 | } |
| 1107 | |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1108 | void gprs_rlcmac_pdch::attach_tbf(gprs_rlcmac_tbf *tbf) |
| 1109 | { |
| 1110 | gprs_rlcmac_ul_tbf *ul_tbf; |
| 1111 | |
| 1112 | if (m_tbfs[tbf->direction][tbf->tfi()]) |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 1113 | LOGPDCH(this, DRLCMAC, LOGL_ERROR, |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1114 | "%s has not been detached, overwriting it\n", |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1115 | m_tbfs[tbf->direction][tbf->tfi()]->name()); |
| 1116 | |
Oliver Smith | 402451b | 2021-09-08 09:33:24 +0200 | [diff] [blame] | 1117 | num_tbfs_update(tbf, true); |
Pau Espin Pedrol | b5fece9 | 2021-08-23 16:58:04 +0200 | [diff] [blame] | 1118 | if (tbf->direction == GPRS_RLCMAC_UL_TBF) { |
| 1119 | ul_tbf = as_ul_tbf(tbf); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1120 | m_assigned_usf |= 1 << ul_tbf->m_usf[ts_no]; |
| 1121 | } |
| 1122 | m_assigned_tfi[tbf->direction] |= 1UL << tbf->tfi(); |
| 1123 | m_tbfs[tbf->direction][tbf->tfi()] = tbf; |
| 1124 | |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 1125 | LOGPDCH(this, DRLCMAC, LOGL_INFO, "Attaching %s, %d TBFs, " |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1126 | "USFs = %02x, TFIs = %08x.\n", |
Oliver Smith | 402451b | 2021-09-08 09:33:24 +0200 | [diff] [blame] | 1127 | tbf->name(), num_tbfs(tbf->direction), |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1128 | m_assigned_usf, m_assigned_tfi[tbf->direction]); |
| 1129 | } |
| 1130 | |
| 1131 | void gprs_rlcmac_pdch::detach_tbf(gprs_rlcmac_tbf *tbf) |
| 1132 | { |
| 1133 | gprs_rlcmac_ul_tbf *ul_tbf; |
| 1134 | |
Oliver Smith | 402451b | 2021-09-08 09:33:24 +0200 | [diff] [blame] | 1135 | if (tbf->is_egprs_enabled()) { |
| 1136 | OSMO_ASSERT(m_num_tbfs_egprs[tbf->direction] > 0); |
| 1137 | } else { |
| 1138 | OSMO_ASSERT(m_num_tbfs_gprs[tbf->direction] > 0); |
| 1139 | } |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1140 | |
Oliver Smith | 402451b | 2021-09-08 09:33:24 +0200 | [diff] [blame] | 1141 | num_tbfs_update(tbf, false); |
Pau Espin Pedrol | b5fece9 | 2021-08-23 16:58:04 +0200 | [diff] [blame] | 1142 | if (tbf->direction == GPRS_RLCMAC_UL_TBF) { |
| 1143 | ul_tbf = as_ul_tbf(tbf); |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1144 | m_assigned_usf &= ~(1 << ul_tbf->m_usf[ts_no]); |
| 1145 | } |
| 1146 | m_assigned_tfi[tbf->direction] &= ~(1UL << tbf->tfi()); |
| 1147 | m_tbfs[tbf->direction][tbf->tfi()] = NULL; |
| 1148 | |
Pau Espin Pedrol | 99360a3 | 2021-03-09 17:18:12 +0100 | [diff] [blame] | 1149 | pdch_ulc_release_tbf(ulc, tbf); |
| 1150 | |
Pau Espin Pedrol | 95e2266 | 2021-02-25 17:49:30 +0100 | [diff] [blame] | 1151 | LOGPDCH(this, DRLCMAC, LOGL_INFO, "Detaching %s, %d TBFs, " |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1152 | "USFs = %02x, TFIs = %08x.\n", |
Oliver Smith | 402451b | 2021-09-08 09:33:24 +0200 | [diff] [blame] | 1153 | tbf->name(), num_tbfs(tbf->direction), |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1154 | m_assigned_usf, m_assigned_tfi[tbf->direction]); |
| 1155 | } |
| 1156 | |
Pau Espin Pedrol | 2286288 | 2020-11-16 17:35:10 +0100 | [diff] [blame] | 1157 | bool gprs_rlcmac_pdch::has_gprs_only_tbf_attached() const |
| 1158 | { |
Oliver Smith | fce67bc | 2021-09-08 11:36:03 +0200 | [diff] [blame] | 1159 | return (m_num_tbfs_gprs[GPRS_RLCMAC_UL_TBF] + |
| 1160 | m_num_tbfs_gprs[GPRS_RLCMAC_DL_TBF]) > 0; |
Pau Espin Pedrol | 2286288 | 2020-11-16 17:35:10 +0100 | [diff] [blame] | 1161 | } |
| 1162 | |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1163 | void gprs_rlcmac_pdch::reserve(enum gprs_rlcmac_tbf_direction dir) |
| 1164 | { |
| 1165 | m_num_reserved[dir] += 1; |
| 1166 | } |
| 1167 | |
| 1168 | void gprs_rlcmac_pdch::unreserve(enum gprs_rlcmac_tbf_direction dir) |
| 1169 | { |
| 1170 | OSMO_ASSERT(m_num_reserved[dir] > 0); |
| 1171 | m_num_reserved[dir] -= 1; |
| 1172 | } |
| 1173 | |
Pau Espin Pedrol | 2182e62 | 2021-01-14 16:48:38 +0100 | [diff] [blame] | 1174 | inline struct gprs_rlcmac_bts *gprs_rlcmac_pdch::bts() const |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 1175 | { |
| 1176 | return trx->bts; |
| 1177 | } |
| 1178 | |
| 1179 | uint8_t gprs_rlcmac_pdch::trx_no() const |
| 1180 | { |
| 1181 | return trx->trx_no; |
| 1182 | } |
| 1183 | |
Vadim Yanitskiy | bd0dac3 | 2019-10-05 21:57:14 +0700 | [diff] [blame] | 1184 | uint8_t gprs_rlcmac_pdch::reserve_tai(uint8_t ta) |
| 1185 | { |
| 1186 | uint8_t tai; |
| 1187 | |
| 1188 | for (tai = 0; tai < PTCCH_TAI_NUM; tai++) { |
| 1189 | if (ptcch_msg[tai] == PTCCH_TAI_FREE) { |
| 1190 | ptcch_msg[tai] = ta; |
| 1191 | return tai; |
| 1192 | } |
| 1193 | } |
| 1194 | |
| 1195 | /* Special case: no free TAI available */ |
| 1196 | return PTCCH_TAI_FREE; |
| 1197 | } |
| 1198 | |
| 1199 | void gprs_rlcmac_pdch::release_tai(uint8_t tai) |
| 1200 | { |
| 1201 | OSMO_ASSERT(tai < PTCCH_TAI_NUM); |
| 1202 | ptcch_msg[tai] = PTCCH_TAI_FREE; |
| 1203 | } |
| 1204 | |
| 1205 | void gprs_rlcmac_pdch::update_ta(uint8_t tai, uint8_t ta) |
| 1206 | { |
| 1207 | OSMO_ASSERT(tai < PTCCH_TAI_NUM); |
| 1208 | ptcch_msg[tai] = ta; |
| 1209 | } |
Pau Espin Pedrol | 906aafc | 2021-01-18 17:53:29 +0100 | [diff] [blame] | 1210 | |
| 1211 | void pdch_free_all_tbf(struct gprs_rlcmac_pdch *pdch) |
| 1212 | { |
Pau Espin Pedrol | 1d663d9 | 2021-09-03 12:39:26 +0200 | [diff] [blame] | 1213 | struct llist_item *pos; |
| 1214 | struct llist_item *pos2; |
| 1215 | |
Pau Espin Pedrol | 906aafc | 2021-01-18 17:53:29 +0100 | [diff] [blame] | 1216 | for (uint8_t tfi = 0; tfi < 32; tfi++) { |
| 1217 | struct gprs_rlcmac_tbf *tbf; |
| 1218 | |
| 1219 | tbf = pdch->ul_tbf_by_tfi(tfi); |
| 1220 | if (tbf) |
| 1221 | tbf_free(tbf); |
| 1222 | tbf = pdch->dl_tbf_by_tfi(tfi); |
| 1223 | if (tbf) |
| 1224 | tbf_free(tbf); |
| 1225 | } |
Pau Espin Pedrol | 1d663d9 | 2021-09-03 12:39:26 +0200 | [diff] [blame] | 1226 | |
| 1227 | /* Some temporary dummy TBFs to tx ImmAssRej may be left linked to the |
| 1228 | * PDCH, since they have no TFI assigned (see handle_tbf_reject()). |
| 1229 | * Get rid of them too: */ |
| 1230 | llist_for_each_entry_safe(pos, pos2, &pdch->trx->ul_tbfs, list) { |
| 1231 | struct gprs_rlcmac_ul_tbf *ul_tbf = as_ul_tbf((struct gprs_rlcmac_tbf *)pos->entry); |
| 1232 | if (ul_tbf->control_ts == pdch->ts_no) |
| 1233 | tbf_free(ul_tbf); |
| 1234 | } |
Pau Espin Pedrol | 906aafc | 2021-01-18 17:53:29 +0100 | [diff] [blame] | 1235 | } |
Pau Espin Pedrol | e91c4c7 | 2021-01-18 17:54:30 +0100 | [diff] [blame] | 1236 | |
Pau Espin Pedrol | 4f67a9b | 2021-06-30 16:03:06 +0200 | [diff] [blame] | 1237 | void pdch_disable(struct gprs_rlcmac_pdch *pdch) |
| 1238 | { |
Pau Espin Pedrol | e91c4c7 | 2021-01-18 17:54:30 +0100 | [diff] [blame] | 1239 | pdch->disable(); |
| 1240 | } |
Pau Espin Pedrol | 4f67a9b | 2021-06-30 16:03:06 +0200 | [diff] [blame] | 1241 | |
| 1242 | bool pdch_is_enabled(const struct gprs_rlcmac_pdch *pdch) |
| 1243 | { |
| 1244 | return pdch->is_enabled(); |
| 1245 | } |