Holger Hans Peter Freyther | b6acfda | 2013-10-17 19:41:11 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 by Holger Hans Peter Freyther |
| 3 | * |
| 4 | * All Rights Reserved |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU Affero General Public License as published by |
| 8 | * the Free Software Foundation; either version 3 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Affero General Public License |
| 17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 18 | * |
| 19 | */ |
| 20 | |
| 21 | #include <bts.h> |
Holger Hans Peter Freyther | b78adcd | 2013-10-17 20:12:37 +0200 | [diff] [blame] | 22 | #include <poll_controller.h> |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 23 | #include <tbf.h> |
Holger Hans Peter Freyther | 63f29d6 | 2013-10-19 19:04:03 +0200 | [diff] [blame] | 24 | #include <encoding.h> |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 25 | #include <decoding.h> |
| 26 | #include <rlc.h> |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 27 | #include <pcu_l1_if.h> |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 28 | |
| 29 | #include <gprs_rlcmac.h> |
Holger Hans Peter Freyther | 24e98d0 | 2013-10-19 18:15:44 +0200 | [diff] [blame] | 30 | #include <gprs_debug.h> |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 31 | |
| 32 | extern "C" { |
| 33 | #include <osmocom/core/talloc.h> |
Holger Hans Peter Freyther | 24e98d0 | 2013-10-19 18:15:44 +0200 | [diff] [blame] | 34 | #include <osmocom/core/msgb.h> |
Holger Hans Peter Freyther | 8df447d | 2015-11-07 21:04:40 +0100 | [diff] [blame] | 35 | #include <osmocom/core/stats.h> |
Max | 9bbe160 | 2016-07-18 12:50:18 +0200 | [diff] [blame] | 36 | #include <osmocom/gsm/protocol/gsm_04_08.h> |
Philipp Maier | 1275a3f | 2017-02-21 19:35:23 +0100 | [diff] [blame] | 37 | #include <osmocom/gsm/gsm_utils.h> |
Harald Welte | 717cdf5 | 2017-07-21 21:56:23 +0200 | [diff] [blame] | 38 | #include <osmocom/core/gsmtap_util.h> |
Harald Welte | 3e51d3e | 2017-10-29 10:57:27 +0100 | [diff] [blame] | 39 | #include <osmocom/core/application.h> |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 40 | } |
Holger Hans Peter Freyther | b78adcd | 2013-10-17 20:12:37 +0200 | [diff] [blame] | 41 | |
Holger Hans Peter Freyther | 24e98d0 | 2013-10-19 18:15:44 +0200 | [diff] [blame] | 42 | #include <arpa/inet.h> |
| 43 | |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 44 | #include <errno.h> |
Holger Hans Peter Freyther | b6acfda | 2013-10-17 19:41:11 +0200 | [diff] [blame] | 45 | #include <string.h> |
| 46 | |
Philipp Maier | 1275a3f | 2017-02-21 19:35:23 +0100 | [diff] [blame] | 47 | #define RFN_MODULUS 42432 |
| 48 | #define RFN_THRESHOLD RFN_MODULUS / 2 |
| 49 | |
Holger Hans Peter Freyther | 24e98d0 | 2013-10-19 18:15:44 +0200 | [diff] [blame] | 50 | extern void *tall_pcu_ctx; |
| 51 | |
Harald Welte | 3e51d3e | 2017-10-29 10:57:27 +0100 | [diff] [blame] | 52 | extern "C" { |
| 53 | /* e must make sure to initialize logging before the BTS static |
| 54 | * constructors are executed below, as those call libosmocore APIs that |
| 55 | * require logging already to be initialized. */ |
| 56 | __attribute__((constructor)) static void early_init(void) |
| 57 | { |
| 58 | osmo_init_logging(&gprs_log_info); |
| 59 | } |
| 60 | } |
| 61 | |
Holger Hans Peter Freyther | b6acfda | 2013-10-17 19:41:11 +0200 | [diff] [blame] | 62 | static BTS s_bts; |
| 63 | |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 64 | /** |
| 65 | * For gcc-4.4 compat do not use extended initializer list but keep the |
| 66 | * order from the enum here. Once we support GCC4.7 and up we can change |
| 67 | * the code below. |
| 68 | */ |
| 69 | static const struct rate_ctr_desc bts_ctr_description[] = { |
Max | a5eb67d | 2017-11-21 20:24:54 +0100 | [diff] [blame] | 70 | { "tbf:dl:alloc", "TBF DL Allocated "}, |
| 71 | { "tbf:dl:freed", "TBF DL Freed "}, |
| 72 | { "tbf:dl:aborted", "TBF DL Aborted "}, |
| 73 | { "tbf:ul:alloc", "TBF UL Allocated "}, |
| 74 | { "tbf:ul:freed", "TBF UL Freed "}, |
| 75 | { "tbf:ul:aborted", "TBF UL Aborted "}, |
| 76 | { "tbf:reused", "TBF Reused "}, |
| 77 | { "tbf:alloc:algo-a", "TBF Alloc Algo A "}, |
| 78 | { "tbf:alloc:algo-b", "TBF Alloc Algo B "}, |
| 79 | { "tbf:failed:egprs-only", "TBF Failed EGPRS-only"}, |
| 80 | { "rlc:sent", "RLC Sent "}, |
| 81 | { "rlc:resent", "RLC Resent "}, |
| 82 | { "rlc:restarted", "RLC Restarted "}, |
| 83 | { "rlc:stalled", "RLC Stalled "}, |
| 84 | { "rlc:nacked", "RLC Nacked "}, |
| 85 | { "rlc:final_block_resent", "RLC Final Blk resent "}, |
| 86 | { "rlc:ass:timedout", "RLC Assign Timeout "}, |
| 87 | { "rlc:ass:failed", "RLC Assign Failed "}, |
| 88 | { "rlc:ack:timedout", "RLC Ack Timeout "}, |
| 89 | { "rlc:ack:failed", "RLC Ack Failed "}, |
| 90 | { "rlc:rel:timedout", "RLC Release Timeout "}, |
| 91 | { "rlc:late-block", "RLC Late Block "}, |
| 92 | { "rlc:sent-dummy", "RLC Sent Dummy "}, |
| 93 | { "rlc:sent-control", "RLC Sent Control "}, |
| 94 | { "rlc:dl_bytes", "RLC DL Bytes "}, |
| 95 | { "rlc:dl_payload_bytes", "RLC DL Payload Bytes "}, |
| 96 | { "rlc:ul_bytes", "RLC UL Bytes "}, |
| 97 | { "rlc:ul_payload_bytes", "RLC UL Payload Bytes "}, |
| 98 | { "decode:errors", "Decode Errors "}, |
| 99 | { "sba:allocated", "SBA Allocated "}, |
| 100 | { "sba:freed", "SBA Freed "}, |
| 101 | { "sba:timedout", "SBA Timeout "}, |
| 102 | { "llc:timeout", "Timedout Frames "}, |
| 103 | { "llc:dropped", "Dropped Frames "}, |
| 104 | { "llc:scheduled", "Scheduled Frames "}, |
| 105 | { "llc:dl_bytes", "RLC encapsulated PDUs"}, |
| 106 | { "llc:ul_bytes", "full PDUs received "}, |
| 107 | { "rach:requests", "RACH requests "}, |
| 108 | { "11bit_rach:requests", "11BIT_RACH requests "}, |
| 109 | { "spb:uplink_first_segment", "First seg of UL SPB "}, |
| 110 | { "spb:uplink_second_segment", "Second seg of UL SPB "}, |
| 111 | { "spb:downlink_first_segment", "First seg of DL SPB "}, |
| 112 | { "spb:downlink_second_segment","Second seg of DL SPB "}, |
| 113 | { "immediate:assignment_UL", "Immediate Assign UL "}, |
| 114 | { "immediate:assignment_rej", "Immediate Assign Rej "}, |
| 115 | { "immediate:assignment_DL", "Immediate Assign DL "}, |
| 116 | { "channel:request_description","Channel Request Desc "}, |
| 117 | { "pkt:ul_assignment", "Packet UL Assignment "}, |
| 118 | { "pkt:access_reject", "Packet Access Reject "}, |
| 119 | { "pkt:dl_assignment", "Packet DL Assignment "}, |
| 120 | { "ul:control", "UL control Block "}, |
| 121 | { "ul:assignment_poll_timeout", "UL Assign Timeout "}, |
| 122 | { "ul:assignment_failed", "UL Assign Failed "}, |
| 123 | { "dl:assignment_timeout", "DL Assign Timeout "}, |
| 124 | { "dl:assignment_failed", "DL Assign Failed "}, |
| 125 | { "pkt:ul_ack_nack_timeout", "PUAN Poll Timeout "}, |
| 126 | { "pkt:ul_ack_nack_failed", "PUAN poll Failed "}, |
| 127 | { "pkt:dl_ack_nack_timeout", "PDAN poll Timeout "}, |
| 128 | { "pkt:dl_ack_nack_failed", "PDAN poll Failed "}, |
| 129 | { "gprs:downlink_cs1", "CS1 downlink "}, |
| 130 | { "gprs:downlink_cs2", "CS2 downlink "}, |
| 131 | { "gprs:downlink_cs3", "CS3 downlink "}, |
| 132 | { "gprs:downlink_cs4", "CS4 downlink "}, |
| 133 | { "egprs:downlink_mcs1", "MCS1 downlink "}, |
| 134 | { "egprs:downlink_mcs2", "MCS2 downlink "}, |
| 135 | { "egprs:downlink_mcs3", "MCS3 downlink "}, |
| 136 | { "egprs:downlink_mcs4", "MCS4 downlink "}, |
| 137 | { "egprs:downlink_mcs5", "MCS5 downlink "}, |
| 138 | { "egprs:downlink_mcs6", "MCS6 downlink "}, |
| 139 | { "egprs:downlink_mcs7", "MCS7 downlink "}, |
| 140 | { "egprs:downlink_mcs8", "MCS8 downlink "}, |
| 141 | { "egprs:downlink_mcs9", "MCS9 downlink "}, |
| 142 | { "gprs:uplink_cs1", "CS1 Uplink "}, |
| 143 | { "gprs:uplink_cs2", "CS2 Uplink "}, |
| 144 | { "gprs:uplink_cs3", "CS3 Uplink "}, |
| 145 | { "gprs:uplink_cs4", "CS4 Uplink "}, |
| 146 | { "egprs:uplink_mcs1", "MCS1 Uplink "}, |
| 147 | { "egprs:uplink_mcs2", "MCS2 Uplink "}, |
| 148 | { "egprs:uplink_mcs3", "MCS3 Uplink "}, |
| 149 | { "egprs:uplink_mcs4", "MCS4 Uplink "}, |
| 150 | { "egprs:uplink_mcs5", "MCS5 Uplink "}, |
| 151 | { "egprs:uplink_mcs6", "MCS6 Uplink "}, |
| 152 | { "egprs:uplink_mcs7", "MCS7 Uplink "}, |
| 153 | { "egprs:uplink_mcs8", "MCS8 Uplink "}, |
| 154 | { "egprs:uplink_mcs9", "MCS9 Uplink "}, |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 155 | }; |
| 156 | |
| 157 | static const struct rate_ctr_group_desc bts_ctrg_desc = { |
| 158 | "bts", |
| 159 | "BTS Statistics", |
Holger Hans Peter Freyther | b8a5426 | 2015-11-07 21:00:00 +0100 | [diff] [blame] | 160 | OSMO_STATS_CLASS_GLOBAL, |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 161 | ARRAY_SIZE(bts_ctr_description), |
| 162 | bts_ctr_description, |
| 163 | }; |
| 164 | |
Jacob Erlbeck | f5898a0 | 2015-11-27 19:05:13 +0100 | [diff] [blame] | 165 | static const struct osmo_stat_item_desc bts_stat_item_description[] = { |
| 166 | { "ms.present", "MS Present ", |
| 167 | OSMO_STAT_ITEM_NO_UNIT, 4, 0}, |
| 168 | }; |
| 169 | |
| 170 | static const struct osmo_stat_item_group_desc bts_statg_desc = { |
| 171 | "bts", |
| 172 | "BTS Statistics", |
| 173 | OSMO_STATS_CLASS_GLOBAL, |
| 174 | ARRAY_SIZE(bts_stat_item_description), |
| 175 | bts_stat_item_description, |
| 176 | }; |
| 177 | |
Holger Hans Peter Freyther | b6acfda | 2013-10-17 19:41:11 +0200 | [diff] [blame] | 178 | BTS* BTS::main_bts() |
| 179 | { |
| 180 | return &s_bts; |
| 181 | } |
| 182 | |
| 183 | struct gprs_rlcmac_bts *BTS::bts_data() |
| 184 | { |
| 185 | return &m_bts; |
| 186 | } |
| 187 | |
| 188 | struct gprs_rlcmac_bts *bts_main_data() |
| 189 | { |
| 190 | return BTS::main_bts()->bts_data(); |
| 191 | } |
| 192 | |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 193 | struct rate_ctr_group *bts_main_data_stats() |
| 194 | { |
| 195 | return BTS::main_bts()->rate_counters(); |
| 196 | } |
| 197 | |
Holger Hans Peter Freyther | b6acfda | 2013-10-17 19:41:11 +0200 | [diff] [blame] | 198 | BTS::BTS() |
Holger Hans Peter Freyther | 9b30c7f | 2013-10-17 19:59:56 +0200 | [diff] [blame] | 199 | : m_cur_fn(0) |
Jacob Erlbeck | 60f7703 | 2015-08-24 14:35:14 +0200 | [diff] [blame] | 200 | , m_cur_blk_fn(-1) |
Holger Hans Peter Freyther | b78adcd | 2013-10-17 20:12:37 +0200 | [diff] [blame] | 201 | , m_pollController(*this) |
Holger Hans Peter Freyther | cedf890 | 2013-10-19 20:47:12 +0200 | [diff] [blame] | 202 | , m_sba(*this) |
Jacob Erlbeck | 17214bb | 2015-06-02 14:06:12 +0200 | [diff] [blame] | 203 | , m_ms_store(this) |
Holger Hans Peter Freyther | b6acfda | 2013-10-17 19:41:11 +0200 | [diff] [blame] | 204 | { |
| 205 | memset(&m_bts, 0, sizeof(m_bts)); |
| 206 | m_bts.bts = this; |
Holger Hans Peter Freyther | 4ed1dae | 2013-10-20 10:14:03 +0200 | [diff] [blame] | 207 | |
| 208 | /* initialize back pointers */ |
| 209 | for (size_t trx_no = 0; trx_no < ARRAY_SIZE(m_bts.trx); ++trx_no) { |
| 210 | struct gprs_rlcmac_trx *trx = &m_bts.trx[trx_no]; |
| 211 | trx->trx_no = trx_no; |
| 212 | trx->bts = this; |
| 213 | |
| 214 | for (size_t ts_no = 0; ts_no < ARRAY_SIZE(trx->pdch); ++ts_no) { |
| 215 | struct gprs_rlcmac_pdch *pdch = &trx->pdch[ts_no]; |
| 216 | pdch->ts_no = ts_no; |
| 217 | pdch->trx = trx; |
| 218 | } |
| 219 | } |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 220 | |
| 221 | m_ratectrs = rate_ctr_group_alloc(tall_pcu_ctx, &bts_ctrg_desc, 0); |
Harald Welte | 9530a40 | 2017-07-12 00:46:36 +0200 | [diff] [blame] | 222 | OSMO_ASSERT(m_ratectrs); |
Jacob Erlbeck | f5898a0 | 2015-11-27 19:05:13 +0100 | [diff] [blame] | 223 | m_statg = osmo_stat_item_group_alloc(tall_pcu_ctx, &bts_statg_desc, 0); |
Harald Welte | 9530a40 | 2017-07-12 00:46:36 +0200 | [diff] [blame] | 224 | OSMO_ASSERT(m_statg); |
Holger Hans Peter Freyther | b6acfda | 2013-10-17 19:41:11 +0200 | [diff] [blame] | 225 | } |
Holger Hans Peter Freyther | 9b30c7f | 2013-10-17 19:59:56 +0200 | [diff] [blame] | 226 | |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 227 | BTS::~BTS() |
| 228 | { |
Jacob Erlbeck | c362df2 | 2016-01-20 22:02:19 +0100 | [diff] [blame] | 229 | /* this can cause counter updates and must not be left to the |
| 230 | * m_ms_store's destructor */ |
| 231 | m_ms_store.cleanup(); |
| 232 | |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 233 | rate_ctr_group_free(m_ratectrs); |
Jacob Erlbeck | c362df2 | 2016-01-20 22:02:19 +0100 | [diff] [blame] | 234 | osmo_stat_item_group_free(m_statg); |
Holger Hans Peter Freyther | f537298 | 2013-10-27 09:02:31 +0100 | [diff] [blame] | 235 | } |
| 236 | |
| 237 | |
Holger Hans Peter Freyther | 9b30c7f | 2013-10-17 19:59:56 +0200 | [diff] [blame] | 238 | void BTS::set_current_frame_number(int fn) |
| 239 | { |
Jacob Erlbeck | ac49d09 | 2015-08-27 13:18:24 +0200 | [diff] [blame] | 240 | /* The UL frame numbers lag 3 behind the DL frames and the data |
| 241 | * indication is only sent after all 4 frames of the block have been |
| 242 | * received. Sometimes there is an idle frame between the end of one |
| 243 | * and start of another frame (every 3 blocks). So the timeout should |
| 244 | * definitely be there if we're more than 8 frames past poll_fn. Let's |
Jacob Erlbeck | e77d49f | 2015-08-27 13:28:05 +0200 | [diff] [blame] | 245 | * stay on the safe side and say 13 or more. An additional delay can |
| 246 | * happen due to the block processing time in the DSP, so the delay of |
| 247 | * decoded blocks relative to the timing clock can be much larger. |
| 248 | * Values up to 50 frames have been observed under load. */ |
| 249 | const static int max_delay = 60; |
Jacob Erlbeck | ac49d09 | 2015-08-27 13:18:24 +0200 | [diff] [blame] | 250 | |
Holger Hans Peter Freyther | 9b30c7f | 2013-10-17 19:59:56 +0200 | [diff] [blame] | 251 | m_cur_fn = fn; |
Jacob Erlbeck | ac49d09 | 2015-08-27 13:18:24 +0200 | [diff] [blame] | 252 | m_pollController.expireTimedout(m_cur_fn, max_delay); |
Holger Hans Peter Freyther | 9b30c7f | 2013-10-17 19:59:56 +0200 | [diff] [blame] | 253 | } |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 254 | |
Max | 9dabfa2 | 2017-05-16 16:10:45 +0200 | [diff] [blame] | 255 | static inline int delta_fn(int fn, int to) |
| 256 | { |
| 257 | return (fn + GSM_MAX_FN * 3 / 2 - to) % GSM_MAX_FN - GSM_MAX_FN/2; |
| 258 | } |
| 259 | |
Jacob Erlbeck | af75ce8 | 2015-08-26 13:22:28 +0200 | [diff] [blame] | 260 | void BTS::set_current_block_frame_number(int fn, unsigned max_delay) |
Jacob Erlbeck | 60f7703 | 2015-08-24 14:35:14 +0200 | [diff] [blame] | 261 | { |
| 262 | int delay = 0; |
| 263 | const int late_block_delay_thresh = 13; |
| 264 | const int fn_update_ok_min_delay = -500; |
| 265 | const int fn_update_ok_max_delay = 0; |
| 266 | |
| 267 | /* frame numbers in the received blocks are assumed to be strongly |
| 268 | * monotonic. */ |
| 269 | if (m_cur_blk_fn >= 0) { |
Max | 9dabfa2 | 2017-05-16 16:10:45 +0200 | [diff] [blame] | 270 | int delta = delta_fn(fn, m_cur_blk_fn); |
Jacob Erlbeck | 60f7703 | 2015-08-24 14:35:14 +0200 | [diff] [blame] | 271 | if (delta <= 0) |
| 272 | return; |
| 273 | } |
| 274 | |
| 275 | /* Check block delay vs. the current frame number */ |
| 276 | if (current_frame_number() != 0) |
Max | 9dabfa2 | 2017-05-16 16:10:45 +0200 | [diff] [blame] | 277 | delay = delta_fn(fn, current_frame_number()); |
Jacob Erlbeck | be4a08b | 2015-08-25 15:19:31 +0200 | [diff] [blame] | 278 | if (delay <= -late_block_delay_thresh) { |
Jacob Erlbeck | 60f7703 | 2015-08-24 14:35:14 +0200 | [diff] [blame] | 279 | LOGP(DRLCMAC, LOGL_NOTICE, |
| 280 | "Late RLC block, FN delta: %d FN: %d curFN: %d\n", |
| 281 | delay, fn, current_frame_number()); |
Jacob Erlbeck | be4a08b | 2015-08-25 15:19:31 +0200 | [diff] [blame] | 282 | rlc_late_block(); |
| 283 | } |
Jacob Erlbeck | 60f7703 | 2015-08-24 14:35:14 +0200 | [diff] [blame] | 284 | |
| 285 | m_cur_blk_fn = fn; |
| 286 | if (delay < fn_update_ok_min_delay || delay > fn_update_ok_max_delay || |
| 287 | current_frame_number() == 0) |
| 288 | m_cur_fn = fn; |
| 289 | |
Jacob Erlbeck | af75ce8 | 2015-08-26 13:22:28 +0200 | [diff] [blame] | 290 | m_pollController.expireTimedout(fn, max_delay); |
Jacob Erlbeck | 60f7703 | 2015-08-24 14:35:14 +0200 | [diff] [blame] | 291 | } |
| 292 | |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 293 | int BTS::add_paging(uint8_t chan_needed, uint8_t *identity_lv) |
| 294 | { |
| 295 | uint8_t l, trx, ts, any_tbf = 0; |
| 296 | struct gprs_rlcmac_tbf *tbf; |
Jacob Erlbeck | ed2dbf6 | 2015-12-28 19:15:40 +0100 | [diff] [blame] | 297 | LListHead<gprs_rlcmac_tbf> *pos; |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 298 | struct gprs_rlcmac_paging *pag; |
| 299 | uint8_t slot_mask[8]; |
| 300 | int8_t first_ts; /* must be signed */ |
| 301 | |
Jacob Erlbeck | ed2dbf6 | 2015-12-28 19:15:40 +0100 | [diff] [blame] | 302 | LListHead<gprs_rlcmac_tbf> *tbfs_lists[] = { |
| 303 | &m_ul_tbfs, |
| 304 | &m_dl_tbfs, |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 305 | NULL |
| 306 | }; |
| 307 | |
| 308 | |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 309 | LOGP(DRLCMAC, LOGL_INFO, "Add RR paging: chan-needed=%d MI=%s\n", |
| 310 | chan_needed, osmo_hexdump(identity_lv + 1, identity_lv[0])); |
| 311 | |
| 312 | /* collect slots to page |
| 313 | * Mark slots for every TBF, but only mark one of it. |
| 314 | * Mark only the first slot found. |
| 315 | * Don't mark, if TBF uses a different slot that is already marked. */ |
| 316 | memset(slot_mask, 0, sizeof(slot_mask)); |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 317 | for (l = 0; tbfs_lists[l]; l++) { |
Jacob Erlbeck | ed2dbf6 | 2015-12-28 19:15:40 +0100 | [diff] [blame] | 318 | llist_for_each(pos, tbfs_lists[l]) { |
| 319 | tbf = pos->entry(); |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 320 | first_ts = -1; |
| 321 | for (ts = 0; ts < 8; ts++) { |
| 322 | if (tbf->pdch[ts]) { |
| 323 | /* remember the first slot found */ |
| 324 | if (first_ts < 0) |
| 325 | first_ts = ts; |
| 326 | /* break, if we already marked a slot */ |
Holger Hans Peter Freyther | ec80f82 | 2013-10-27 13:44:37 +0100 | [diff] [blame] | 327 | if ((slot_mask[tbf->trx->trx_no] & (1 << ts))) |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 328 | break; |
| 329 | } |
| 330 | } |
| 331 | /* mark first slot found, if none is marked already */ |
| 332 | if (ts == 8 && first_ts >= 0) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 333 | LOGP(DRLCMAC, LOGL_DEBUG, "- %s uses " |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 334 | "TRX=%d TS=%d, so we mark\n", |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 335 | tbf_name(tbf), |
| 336 | tbf->trx->trx_no, first_ts); |
Holger Hans Peter Freyther | ec80f82 | 2013-10-27 13:44:37 +0100 | [diff] [blame] | 337 | slot_mask[tbf->trx->trx_no] |= (1 << first_ts); |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 338 | } else |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 339 | LOGP(DRLCMAC, LOGL_DEBUG, "- %s uses " |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 340 | "already marked TRX=%d TS=%d\n", |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 341 | tbf_name(tbf), |
| 342 | tbf->trx->trx_no, ts); |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 343 | } |
| 344 | } |
| 345 | |
| 346 | /* Now we have a list of marked slots. Every TBF uses at least one |
| 347 | * of these slots. */ |
| 348 | |
| 349 | /* schedule paging to all marked slots */ |
| 350 | for (trx = 0; trx < 8; trx++) { |
| 351 | if (slot_mask[trx] == 0) |
| 352 | continue; |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 353 | for (ts = 0; ts < 8; ts++) { |
| 354 | if ((slot_mask[trx] & (1 << ts))) { |
| 355 | /* schedule */ |
| 356 | pag = talloc_zero(tall_pcu_ctx, |
| 357 | struct gprs_rlcmac_paging); |
| 358 | if (!pag) |
| 359 | return -ENOMEM; |
| 360 | pag->chan_needed = chan_needed; |
| 361 | memcpy(pag->identity_lv, identity_lv, |
| 362 | identity_lv[0] + 1); |
| 363 | m_bts.trx[trx].pdch[ts].add_paging(pag); |
| 364 | LOGP(DRLCMAC, LOGL_INFO, "Paging on PACCH of " |
| 365 | "TRX=%d TS=%d\n", trx, ts); |
Holger Hans Peter Freyther | 9446485 | 2013-10-19 18:33:52 +0200 | [diff] [blame] | 366 | any_tbf = 1; |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 367 | } |
| 368 | } |
| 369 | } |
| 370 | |
| 371 | if (!any_tbf) |
| 372 | LOGP(DRLCMAC, LOGL_INFO, "No paging, because no TBF\n"); |
| 373 | |
| 374 | return 0; |
| 375 | } |
| 376 | |
Harald Welte | 717cdf5 | 2017-07-21 21:56:23 +0200 | [diff] [blame] | 377 | void BTS::send_gsmtap(enum pcu_gsmtap_category categ, bool uplink, uint8_t trx_no, |
| 378 | uint8_t ts_no, uint8_t channel, uint32_t fn, |
| 379 | const uint8_t *data, unsigned int len) |
| 380 | { |
| 381 | uint16_t arfcn; |
| 382 | |
| 383 | /* check if category is activated at all */ |
| 384 | if (!(m_bts.gsmtap_categ_mask & (1 << categ))) |
| 385 | return; |
| 386 | |
| 387 | arfcn = m_bts.trx[trx_no].arfcn; |
| 388 | if (uplink) |
| 389 | arfcn |= GSMTAP_ARFCN_F_UPLINK; |
| 390 | |
| 391 | gsmtap_send(m_bts.gsmtap, arfcn, ts_no, channel, 0, fn, 0, 0, data, len); |
| 392 | } |
| 393 | |
Max | 341dccd | 2017-08-14 15:49:59 +0200 | [diff] [blame] | 394 | static inline bool tbf_check(gprs_rlcmac_tbf *tbf, uint32_t fn, uint8_t trx_no, uint8_t ts) |
| 395 | { |
| 396 | if (tbf->state_is_not(GPRS_RLCMAC_RELEASING) && tbf->poll_state == GPRS_RLCMAC_POLL_SCHED |
| 397 | && tbf->poll_fn == fn && tbf->trx->trx_no == trx_no && tbf->poll_ts == ts) |
| 398 | return true; |
| 399 | |
| 400 | return false; |
| 401 | } |
| 402 | |
Daniel Willmann | fe6e2e4 | 2014-07-10 17:44:06 +0200 | [diff] [blame] | 403 | gprs_rlcmac_dl_tbf *BTS::dl_tbf_by_poll_fn(uint32_t fn, uint8_t trx, uint8_t ts) |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 404 | { |
Jacob Erlbeck | ed2dbf6 | 2015-12-28 19:15:40 +0100 | [diff] [blame] | 405 | LListHead<gprs_rlcmac_tbf> *pos; |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 406 | |
| 407 | /* only one TBF can poll on specific TS/FN, because scheduler can only |
| 408 | * schedule one downlink control block (with polling) at a FN per TS */ |
Jacob Erlbeck | ed2dbf6 | 2015-12-28 19:15:40 +0100 | [diff] [blame] | 409 | llist_for_each(pos, &m_dl_tbfs) { |
Max | 341dccd | 2017-08-14 15:49:59 +0200 | [diff] [blame] | 410 | if (tbf_check(pos->entry(), fn, trx, ts)) |
| 411 | return as_dl_tbf(pos->entry()); |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 412 | } |
Daniel Willmann | febf1a0 | 2014-07-02 17:58:16 +0200 | [diff] [blame] | 413 | return NULL; |
| 414 | } |
Max | 341dccd | 2017-08-14 15:49:59 +0200 | [diff] [blame] | 415 | |
Daniel Willmann | fe6e2e4 | 2014-07-10 17:44:06 +0200 | [diff] [blame] | 416 | gprs_rlcmac_ul_tbf *BTS::ul_tbf_by_poll_fn(uint32_t fn, uint8_t trx, uint8_t ts) |
Daniel Willmann | febf1a0 | 2014-07-02 17:58:16 +0200 | [diff] [blame] | 417 | { |
Jacob Erlbeck | ed2dbf6 | 2015-12-28 19:15:40 +0100 | [diff] [blame] | 418 | LListHead<gprs_rlcmac_tbf> *pos; |
Daniel Willmann | febf1a0 | 2014-07-02 17:58:16 +0200 | [diff] [blame] | 419 | |
| 420 | /* only one TBF can poll on specific TS/FN, because scheduler can only |
| 421 | * schedule one downlink control block (with polling) at a FN per TS */ |
Jacob Erlbeck | ed2dbf6 | 2015-12-28 19:15:40 +0100 | [diff] [blame] | 422 | llist_for_each(pos, &m_ul_tbfs) { |
Max | 341dccd | 2017-08-14 15:49:59 +0200 | [diff] [blame] | 423 | if (tbf_check(pos->entry(), fn, trx, ts)) |
| 424 | return as_ul_tbf(pos->entry()); |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 425 | } |
| 426 | return NULL; |
| 427 | } |
| 428 | |
Daniel Willmann | 54044b0 | 2014-07-02 17:58:15 +0200 | [diff] [blame] | 429 | /* lookup downlink TBF Entity (by TFI) */ |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 430 | gprs_rlcmac_dl_tbf *BTS::dl_tbf_by_tfi(uint8_t tfi, uint8_t trx, uint8_t ts) |
Daniel Willmann | 54044b0 | 2014-07-02 17:58:15 +0200 | [diff] [blame] | 431 | { |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 432 | if (trx >= 8 || ts >= 8) |
| 433 | return NULL; |
| 434 | |
| 435 | return m_bts.trx[trx].pdch[ts].dl_tbf_by_tfi(tfi); |
Daniel Willmann | 54044b0 | 2014-07-02 17:58:15 +0200 | [diff] [blame] | 436 | } |
| 437 | |
| 438 | /* lookup uplink TBF Entity (by TFI) */ |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 439 | gprs_rlcmac_ul_tbf *BTS::ul_tbf_by_tfi(uint8_t tfi, uint8_t trx, uint8_t ts) |
Daniel Willmann | 54044b0 | 2014-07-02 17:58:15 +0200 | [diff] [blame] | 440 | { |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 441 | if (trx >= 8 || ts >= 8) |
Holger Hans Peter Freyther | f63cabd | 2013-10-26 19:10:43 +0200 | [diff] [blame] | 442 | return NULL; |
| 443 | |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 444 | return m_bts.trx[trx].pdch[ts].ul_tbf_by_tfi(tfi); |
Holger Hans Peter Freyther | f63cabd | 2013-10-26 19:10:43 +0200 | [diff] [blame] | 445 | } |
| 446 | |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 447 | /* |
| 448 | * Search for free TFI and return TFI, TRX. |
| 449 | * This method returns the first TFI that is currently not used in any PDCH of |
| 450 | * a TRX. The first TRX that contains such an TFI is returned. Negative values |
| 451 | * indicate errors. |
| 452 | */ |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 453 | int BTS::tfi_find_free(enum gprs_rlcmac_tbf_direction dir, |
| 454 | uint8_t *_trx, int8_t use_trx) |
| 455 | { |
| 456 | struct gprs_rlcmac_pdch *pdch; |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 457 | uint32_t free_tfis; |
| 458 | bool has_pdch = false; |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 459 | uint8_t trx_from, trx_to, trx, ts, tfi; |
| 460 | |
| 461 | if (use_trx >= 0 && use_trx < 8) |
| 462 | trx_from = trx_to = use_trx; |
| 463 | else { |
| 464 | trx_from = 0; |
| 465 | trx_to = 7; |
| 466 | } |
| 467 | |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 468 | /* find a TFI that is unused on all PDCH */ |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 469 | for (trx = trx_from; trx <= trx_to; trx++) { |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 470 | bool trx_has_pdch = false; |
| 471 | |
| 472 | free_tfis = 0xffffffff; |
| 473 | |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 474 | for (ts = 0; ts < 8; ts++) { |
| 475 | pdch = &m_bts.trx[trx].pdch[ts]; |
| 476 | if (!pdch->is_enabled()) |
| 477 | continue; |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 478 | free_tfis &= ~pdch->assigned_tfi(dir); |
| 479 | trx_has_pdch = true; |
| 480 | has_pdch = true; |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 481 | } |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 482 | if (trx_has_pdch && free_tfis) |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 483 | break; |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 484 | |
| 485 | free_tfis = 0; |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 486 | } |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 487 | if (!has_pdch) { |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 488 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH available.\n"); |
| 489 | return -EINVAL; |
| 490 | } |
| 491 | |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 492 | if (!free_tfis) { |
| 493 | LOGP(DRLCMAC, LOGL_NOTICE, "No TFI available.\n"); |
| 494 | return -EBUSY; |
| 495 | } |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 496 | |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 497 | |
| 498 | LOGP(DRLCMAC, LOGL_DEBUG, |
| 499 | "Searching for first unallocated TFI: TRX=%d\n", trx); |
| 500 | |
| 501 | /* find the first */ |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 502 | for (tfi = 0; tfi < 32; tfi++) { |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 503 | if (free_tfis & 1 << tfi) |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 504 | break; |
| 505 | } |
| 506 | |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 507 | OSMO_ASSERT(tfi < 32); |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 508 | |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 509 | LOGP(DRLCMAC, LOGL_DEBUG, " Found TFI=%d.\n", tfi); |
| 510 | *_trx = trx; |
| 511 | return tfi; |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 512 | } |
| 513 | |
Holger Hans Peter Freyther | 40cfaa6 | 2013-10-26 19:49:16 +0200 | [diff] [blame] | 514 | int BTS::rcv_imm_ass_cnf(const uint8_t *data, uint32_t fn) |
| 515 | { |
Jacob Erlbeck | 767193e | 2015-05-20 12:06:46 +0200 | [diff] [blame] | 516 | struct gprs_rlcmac_dl_tbf *dl_tbf = NULL; |
Holger Hans Peter Freyther | 40cfaa6 | 2013-10-26 19:49:16 +0200 | [diff] [blame] | 517 | uint8_t plen; |
| 518 | uint32_t tlli; |
Jacob Erlbeck | 767193e | 2015-05-20 12:06:46 +0200 | [diff] [blame] | 519 | GprsMs *ms; |
Holger Hans Peter Freyther | 40cfaa6 | 2013-10-26 19:49:16 +0200 | [diff] [blame] | 520 | |
| 521 | /* move to IA Rest Octets */ |
| 522 | plen = data[0] >> 2; |
| 523 | data += 1 + plen; |
| 524 | |
| 525 | if ((*data & 0xf0) != 0xd0) { |
| 526 | LOGP(DRLCMAC, LOGL_ERROR, "Got IMM.ASS confirm, but rest " |
| 527 | "octets do not start with bit sequence 'HH01' " |
| 528 | "(Packet Downlink Assignment)\n"); |
| 529 | return -EINVAL; |
| 530 | } |
| 531 | |
| 532 | /* get TLLI from downlink assignment */ |
| 533 | tlli = (*data++) << 28; |
| 534 | tlli |= (*data++) << 20; |
| 535 | tlli |= (*data++) << 12; |
| 536 | tlli |= (*data++) << 4; |
| 537 | tlli |= (*data++) >> 4; |
| 538 | |
Jacob Erlbeck | 767193e | 2015-05-20 12:06:46 +0200 | [diff] [blame] | 539 | ms = ms_by_tlli(tlli); |
| 540 | if (ms) |
| 541 | dl_tbf = ms->dl_tbf(); |
Daniel Willmann | 1dac2eb | 2014-08-07 12:37:34 +0200 | [diff] [blame] | 542 | if (!dl_tbf) { |
Holger Hans Peter Freyther | 40cfaa6 | 2013-10-26 19:49:16 +0200 | [diff] [blame] | 543 | LOGP(DRLCMAC, LOGL_ERROR, "Got IMM.ASS confirm, but TLLI=%08x " |
| 544 | "does not exit\n", tlli); |
| 545 | return -EINVAL; |
| 546 | } |
| 547 | |
| 548 | LOGP(DRLCMAC, LOGL_DEBUG, "Got IMM.ASS confirm for TLLI=%08x\n", tlli); |
| 549 | |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 550 | if (dl_tbf->m_wait_confirm) |
Daniel Willmann | 1dac2eb | 2014-08-07 12:37:34 +0200 | [diff] [blame] | 551 | tbf_timer_start(dl_tbf, 0, Tassign_agch); |
Holger Hans Peter Freyther | 40cfaa6 | 2013-10-26 19:49:16 +0200 | [diff] [blame] | 552 | |
| 553 | return 0; |
| 554 | } |
| 555 | |
Philipp Maier | 1275a3f | 2017-02-21 19:35:23 +0100 | [diff] [blame] | 556 | /* Determine the full frame number from a relative frame number */ |
Max | 5dd8d1b | 2017-03-08 12:06:42 +0100 | [diff] [blame] | 557 | uint32_t BTS::rfn_to_fn(int32_t rfn) |
Philipp Maier | 1275a3f | 2017-02-21 19:35:23 +0100 | [diff] [blame] | 558 | { |
Max | 5dd8d1b | 2017-03-08 12:06:42 +0100 | [diff] [blame] | 559 | int32_t m_cur_rfn; |
| 560 | int32_t fn; |
| 561 | int32_t fn_rounded; |
| 562 | |
| 563 | /* double-check that relative FN is not negative and fits into int32_t */ |
| 564 | OSMO_ASSERT(rfn < GSM_MAX_FN); |
| 565 | OSMO_ASSERT(rfn >= 0); |
Philipp Maier | 1275a3f | 2017-02-21 19:35:23 +0100 | [diff] [blame] | 566 | |
| 567 | /* Note: If a BTS is sending in a rach request it will be fully aware |
| 568 | * of the frame number. If the PCU is used in a BSC-co-located setup. |
| 569 | * The BSC will forward the incoming RACH request. The RACH request |
| 570 | * only contains the relative frame number (Fn % 42432) in its request |
| 571 | * reference. This PCU implementation has to fit both scenarios, so |
| 572 | * we need to assume that Fn is a relative frame number. */ |
| 573 | |
| 574 | /* Ensure that all following calculations are performed with the |
| 575 | * relative frame number */ |
Max | 5dd8d1b | 2017-03-08 12:06:42 +0100 | [diff] [blame] | 576 | if (rfn >= RFN_MODULUS) |
| 577 | return rfn; |
Philipp Maier | 1275a3f | 2017-02-21 19:35:23 +0100 | [diff] [blame] | 578 | |
| 579 | /* Compute an internal relative frame number from the full internal |
| 580 | frame number */ |
| 581 | m_cur_rfn = m_cur_fn % RFN_MODULUS; |
| 582 | |
| 583 | /* Compute a "rounded" version of the internal frame number, which |
| 584 | * exactly fits in the RFN_MODULUS raster */ |
| 585 | fn_rounded = m_cur_fn - m_cur_rfn; |
| 586 | |
| 587 | /* If the delta between the internal and the external relative frame |
| 588 | * number exceeds a certain limit, we need to assume that the incoming |
| 589 | * rach request belongs to a the previous rfn period. To correct this, |
| 590 | * we roll back the rounded frame number by one RFN_MODULUS */ |
| 591 | if (abs(rfn - m_cur_rfn) > RFN_THRESHOLD) { |
| 592 | LOGP(DRLCMAC, LOGL_DEBUG, |
| 593 | "Race condition between rfn (%u) and m_cur_fn (%u) detected: rfn belongs to the previos modulus %u cycle, wrappng...\n", |
| 594 | rfn, m_cur_fn, RFN_MODULUS); |
| 595 | if (fn_rounded < RFN_MODULUS) { |
| 596 | LOGP(DRLCMAC, LOGL_DEBUG, |
| 597 | "Cornercase detected: wrapping crosses %u border\n", |
| 598 | GSM_MAX_FN); |
| 599 | fn_rounded = GSM_MAX_FN - (RFN_MODULUS - fn_rounded); |
| 600 | } |
| 601 | else |
| 602 | fn_rounded -= RFN_MODULUS; |
| 603 | } |
| 604 | |
| 605 | /* The real frame number is the sum of the rounded frame number and the |
| 606 | * relative framenumber computed via RACH */ |
| 607 | fn = fn_rounded + rfn; |
| 608 | |
| 609 | return fn; |
| 610 | } |
| 611 | |
bhargava | 959d1de | 2016-08-17 15:17:21 +0530 | [diff] [blame] | 612 | int BTS::rcv_rach(uint16_t ra, uint32_t Fn, int16_t qta, uint8_t is_11bit, |
| 613 | enum ph_burst_type burst_type) |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 614 | { |
Jacob Erlbeck | 1f33294 | 2015-05-04 08:21:17 +0200 | [diff] [blame] | 615 | struct gprs_rlcmac_ul_tbf *tbf = NULL; |
Holger Hans Peter Freyther | f37e514 | 2013-12-25 18:56:34 +0100 | [diff] [blame] | 616 | uint8_t trx_no, ts_no = 0; |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 617 | uint8_t sb = 0; |
| 618 | uint32_t sb_fn = 0; |
aravind sirsikar | c0c3afd | 2016-11-09 16:27:00 +0530 | [diff] [blame] | 619 | int rc = 0; |
Jacob Erlbeck | 2647a33 | 2016-02-01 16:13:38 +0100 | [diff] [blame] | 620 | int plen; |
Jacob Erlbeck | 2ca86af | 2016-01-20 18:26:13 +0100 | [diff] [blame] | 621 | uint8_t usf = 7; |
aravind sirsikar | c0c3afd | 2016-11-09 16:27:00 +0530 | [diff] [blame] | 622 | uint8_t tsc = 0, ta = qta2ta(qta); |
bhargava | 628dcfb | 2016-09-14 20:30:31 +0530 | [diff] [blame] | 623 | uint16_t ms_class = 0; |
| 624 | uint16_t priority = 0; |
aravind sirsikar | c0c3afd | 2016-11-09 16:27:00 +0530 | [diff] [blame] | 625 | bool failure = false; |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 626 | |
Holger Hans Peter Freyther | c1ae226 | 2013-10-27 10:50:35 +0100 | [diff] [blame] | 627 | rach_frame(); |
| 628 | |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 629 | if (is_11bit) |
| 630 | rach_frame_11bit(); |
| 631 | |
Philipp Maier | 1275a3f | 2017-02-21 19:35:23 +0100 | [diff] [blame] | 632 | /* Determine full frame number */ |
| 633 | Fn = rfn_to_fn(Fn); |
Philipp | d935d88 | 2016-11-07 13:07:36 +0100 | [diff] [blame] | 634 | |
aravind sirsikar | c0c3afd | 2016-11-09 16:27:00 +0530 | [diff] [blame] | 635 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF on RACH, " |
Philipp Maier | 53f0b4d | 2017-01-26 11:39:16 +0100 | [diff] [blame] | 636 | "so we provide one: ra=0x%02x Fn=%u qta=%d is_11bit=%d:\n", |
| 637 | ra, Fn, qta, is_11bit); |
bhargava | 628dcfb | 2016-09-14 20:30:31 +0530 | [diff] [blame] | 638 | |
| 639 | sb = is_single_block(ra, burst_type, is_11bit, &ms_class, &priority); |
| 640 | |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 641 | if (sb) { |
Jacob Erlbeck | 2ca86af | 2016-01-20 18:26:13 +0100 | [diff] [blame] | 642 | rc = sba()->alloc(&trx_no, &ts_no, &sb_fn, ta); |
aravind sirsikar | c0c3afd | 2016-11-09 16:27:00 +0530 | [diff] [blame] | 643 | if (rc < 0) { |
| 644 | failure = true; |
| 645 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH resource for " |
| 646 | "single block allocation." |
| 647 | "sending Immediate " |
| 648 | "Assignment Uplink (AGCH) reject\n"); |
| 649 | } else { |
| 650 | tsc = m_bts.trx[trx_no].pdch[ts_no].tsc; |
| 651 | |
| 652 | LOGP(DRLCMAC, LOGL_DEBUG, "RX: [PCU <- BTS] RACH " |
| 653 | " qbit-ta=%d ra=0x%02x, Fn=%d (%d,%d,%d)," |
| 654 | " SBFn=%d\n", |
| 655 | qta, ra, |
| 656 | Fn, (Fn / (26 * 51)) % 32, Fn % 51, Fn % 26, |
| 657 | sb_fn); |
| 658 | LOGP(DRLCMAC, LOGL_INFO, "TX: Immediate Assignment " |
| 659 | "Uplink (AGCH)\n"); |
| 660 | } |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 661 | } else { |
| 662 | // Create new TBF |
Max | 5a6bcfb | 2017-09-01 14:36:44 +0200 | [diff] [blame] | 663 | /* FIXME: Copy and paste with other routines.. */ |
bhargava | 628dcfb | 2016-09-14 20:30:31 +0530 | [diff] [blame] | 664 | |
| 665 | if (is_11bit) { |
| 666 | tbf = tbf_alloc_ul_tbf(&m_bts, NULL, -1, 0, |
| 667 | ms_class, 1); |
| 668 | } else { |
| 669 | /* set class to 0, since we don't know the multislot |
| 670 | * class yet */ |
| 671 | tbf = tbf_alloc_ul_tbf(&m_bts, NULL, -1, 0, 0, 1); |
| 672 | } |
| 673 | |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 674 | if (!tbf) { |
aravind sirsikar | c0c3afd | 2016-11-09 16:27:00 +0530 | [diff] [blame] | 675 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH resource sending " |
| 676 | "Immediate Assignment Uplink (AGCH) " |
| 677 | "reject\n"); |
| 678 | rc = -EBUSY; |
| 679 | failure = true; |
| 680 | } else { |
| 681 | tbf->set_ta(ta); |
| 682 | tbf->set_state(GPRS_RLCMAC_FLOW); |
| 683 | tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_CCCH); |
| 684 | tbf_timer_start(tbf, 3169, m_bts.t3169, 0); |
| 685 | LOGP(DRLCMAC, LOGL_DEBUG, "%s [UPLINK] START\n", |
| 686 | tbf_name(tbf)); |
| 687 | LOGP(DRLCMAC, LOGL_DEBUG, "%s RX: [PCU <- BTS] RACH " |
| 688 | "qbit-ta=%d ra=0x%02x, Fn=%d " |
| 689 | " (%d,%d,%d)\n", |
| 690 | tbf_name(tbf), |
| 691 | qta, ra, Fn, (Fn / (26 * 51)) % 32, |
| 692 | Fn % 51, Fn % 26); |
| 693 | LOGP(DRLCMAC, LOGL_INFO, "%s TX: START Immediate " |
| 694 | "Assignment Uplink (AGCH)\n", |
| 695 | tbf_name(tbf)); |
| 696 | trx_no = tbf->trx->trx_no; |
| 697 | ts_no = tbf->first_ts; |
| 698 | usf = tbf->m_usf[ts_no]; |
| 699 | tsc = tbf->tsc(); |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 700 | } |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 701 | } |
Alexander Couzens | ccde5c9 | 2017-02-04 03:10:08 +0100 | [diff] [blame] | 702 | bitvec *immediate_assignment = bitvec_alloc(22, tall_pcu_ctx) /* without plen */; |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 703 | bitvec_unhex(immediate_assignment, |
| 704 | "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
Jacob Erlbeck | 2ca86af | 2016-01-20 18:26:13 +0100 | [diff] [blame] | 705 | |
Jacob Erlbeck | 2ca86af | 2016-01-20 18:26:13 +0100 | [diff] [blame] | 706 | |
sivasankari | 168911b | 2016-11-25 19:53:36 +0530 | [diff] [blame] | 707 | if (failure) { |
aravind sirsikar | c0c3afd | 2016-11-09 16:27:00 +0530 | [diff] [blame] | 708 | plen = Encoding::write_immediate_assignment_reject( |
| 709 | immediate_assignment, ra, Fn, |
| 710 | burst_type); |
sivasankari | 168911b | 2016-11-25 19:53:36 +0530 | [diff] [blame] | 711 | immediate_assignment_reject(); |
| 712 | } |
aravind sirsikar | c0c3afd | 2016-11-09 16:27:00 +0530 | [diff] [blame] | 713 | else { |
| 714 | LOGP(DRLCMAC, LOGL_DEBUG, |
| 715 | " - TRX=%d (%d) TS=%d TA=%d TSC=%d TFI=%d USF=%d\n", |
| 716 | trx_no, m_bts.trx[trx_no].arfcn, ts_no, ta, tsc, |
| 717 | tbf ? tbf->tfi() : -1, usf); |
| 718 | |
| 719 | plen = Encoding::write_immediate_assignment( |
| 720 | tbf, immediate_assignment, 0, ra, Fn, ta, |
| 721 | m_bts.trx[trx_no].arfcn, ts_no, tsc, usf, 0, sb_fn, |
| 722 | m_bts.alpha, m_bts.gamma, -1, burst_type, sb); |
| 723 | } |
Jacob Erlbeck | 2ca86af | 2016-01-20 18:26:13 +0100 | [diff] [blame] | 724 | |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 725 | if (plen >= 0) { |
| 726 | immediate_assignment_ul_tbf(); |
Jacob Erlbeck | 2647a33 | 2016-02-01 16:13:38 +0100 | [diff] [blame] | 727 | pcu_l1if_tx_agch(immediate_assignment, plen); |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 728 | } |
Jacob Erlbeck | 2647a33 | 2016-02-01 16:13:38 +0100 | [diff] [blame] | 729 | |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 730 | bitvec_free(immediate_assignment); |
| 731 | |
aravind sirsikar | c0c3afd | 2016-11-09 16:27:00 +0530 | [diff] [blame] | 732 | return rc; |
Holger Hans Peter Freyther | 02beed5 | 2013-10-26 20:56:20 +0200 | [diff] [blame] | 733 | } |
| 734 | |
bhargava | 628dcfb | 2016-09-14 20:30:31 +0530 | [diff] [blame] | 735 | uint8_t BTS::is_single_block(uint16_t ra, enum ph_burst_type burst_type, |
| 736 | uint8_t is_11bit, uint16_t *ms_class, uint16_t *priority) |
| 737 | { |
| 738 | uint8_t sb = 0, val = 0; |
| 739 | |
| 740 | if (!is_11bit && (burst_type == GSM_L1_BURST_TYPE_ACCESS_0)) { |
| 741 | |
| 742 | if ((ra & 0xf8) == 0x70) { |
| 743 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests single block " |
| 744 | "allocation\n"); |
| 745 | sb = 1; |
| 746 | } else if (m_bts.force_two_phase) { |
| 747 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests single " |
| 748 | "phase access, but we force two phase " |
| 749 | "access\n"); |
| 750 | sb = 1; |
| 751 | } |
| 752 | |
| 753 | } else if (is_11bit && |
| 754 | ((burst_type == GSM_L1_BURST_TYPE_ACCESS_1) || |
| 755 | (burst_type == GSM_L1_BURST_TYPE_ACCESS_2))) { |
| 756 | |
| 757 | val = !!(ra & (1 << 10)); |
| 758 | |
| 759 | if (!val) { |
| 760 | if (m_bts.force_two_phase) { |
| 761 | LOGP(DRLCMAC, LOGL_DEBUG, "EGPRS 11 bit RACH " |
| 762 | "received. MS requests single phase " |
| 763 | "access but we force two phase " |
| 764 | "access\n"); |
| 765 | sb = 1; |
| 766 | } else { |
| 767 | sb = 0; |
| 768 | *ms_class = (ra & 0x3e0) >> 5; |
| 769 | *priority = (ra & 0x18) >> 3; |
| 770 | } |
| 771 | |
| 772 | } else { |
| 773 | LOGP(DRLCMAC, LOGL_DEBUG, "EGPRS 11 bit RACH received." |
| 774 | "MS requests single block allocation\n"); |
| 775 | sb = 1; |
| 776 | } |
| 777 | |
| 778 | } else if (is_11bit && |
| 779 | (burst_type == GSM_L1_BURST_TYPE_ACCESS_0)) { |
| 780 | LOGP(DRLCMAC, LOGL_ERROR, |
| 781 | "Error: GPRS 11 bit RACH not supported\n"); |
| 782 | |
| 783 | } else if (burst_type == GSM_L1_BURST_TYPE_NONE) { |
| 784 | LOGP(DRLCMAC, LOGL_DEBUG, "pcu has not received burst type " |
| 785 | "from bts \n"); |
| 786 | |
| 787 | if ((ra & 0xf8) == 0x70) { |
| 788 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests single block " |
| 789 | "allocation\n"); |
| 790 | sb = 1; |
| 791 | } else if (m_bts.force_two_phase) { |
| 792 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests single " |
| 793 | "phase access, but we force two phase " |
| 794 | "access\n"); |
| 795 | sb = 1; |
| 796 | } |
| 797 | } |
| 798 | |
| 799 | return sb; |
| 800 | } |
| 801 | |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 802 | void BTS::snd_dl_ass(gprs_rlcmac_tbf *tbf, uint8_t poll, const char *imsi) |
| 803 | { |
| 804 | int plen; |
Jacob Erlbeck | 29e3a2f | 2016-02-05 19:04:23 +0100 | [diff] [blame] | 805 | unsigned int ts = tbf->first_ts; |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 806 | |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 807 | LOGP(DRLCMAC, LOGL_INFO, "TX: START %s Immediate Assignment Downlink (PCH)\n", tbf_name(tbf)); |
Alexander Couzens | ccde5c9 | 2017-02-04 03:10:08 +0100 | [diff] [blame] | 808 | bitvec *immediate_assignment = bitvec_alloc(22, tall_pcu_ctx); /* without plen */ |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 809 | bitvec_unhex(immediate_assignment, "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
| 810 | /* use request reference that has maximum distance to current time, |
| 811 | * so the assignment will not conflict with possible RACH requests. */ |
Jacob Erlbeck | 2ca86af | 2016-01-20 18:26:13 +0100 | [diff] [blame] | 812 | LOGP(DRLCMAC, LOGL_DEBUG, " - TRX=%d (%d) TS=%d TA=%d pollFN=%d\n", |
| 813 | tbf->trx->trx_no, tbf->trx->arfcn, |
| 814 | ts, tbf->ta(), poll ? tbf->poll_fn : -1); |
Jacob Erlbeck | 2647a33 | 2016-02-01 16:13:38 +0100 | [diff] [blame] | 815 | plen = Encoding::write_immediate_assignment(tbf, immediate_assignment, 1, 125, |
Max | 9dabfa2 | 2017-05-16 16:10:45 +0200 | [diff] [blame] | 816 | (tbf->pdch[ts]->last_rts_fn + 21216) % GSM_MAX_FN, tbf->ta(), |
Jacob Erlbeck | 2647a33 | 2016-02-01 16:13:38 +0100 | [diff] [blame] | 817 | tbf->trx->arfcn, ts, tbf->tsc(), 7, poll, |
| 818 | tbf->poll_fn, m_bts.alpha, m_bts.gamma, -1); |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 819 | if (plen >= 0) { |
| 820 | immediate_assignment_dl_tbf(); |
Jacob Erlbeck | 2647a33 | 2016-02-01 16:13:38 +0100 | [diff] [blame] | 821 | pcu_l1if_tx_pch(immediate_assignment, plen, imsi); |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 822 | } |
| 823 | |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 824 | bitvec_free(immediate_assignment); |
| 825 | } |
| 826 | |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 827 | |
Jacob Erlbeck | 86b6f05 | 2015-11-27 15:17:34 +0100 | [diff] [blame] | 828 | GprsMs *BTS::ms_alloc(uint8_t ms_class, uint8_t egprs_ms_class) |
Jacob Erlbeck | cb1b494 | 2015-06-19 10:59:58 +0200 | [diff] [blame] | 829 | { |
| 830 | GprsMs *ms; |
| 831 | ms = ms_store().create_ms(); |
| 832 | |
| 833 | ms->set_timeout(m_bts.ms_idle_sec); |
| 834 | ms->set_ms_class(ms_class); |
Jacob Erlbeck | 86b6f05 | 2015-11-27 15:17:34 +0100 | [diff] [blame] | 835 | ms->set_egprs_ms_class(egprs_ms_class); |
Jacob Erlbeck | cb1b494 | 2015-06-19 10:59:58 +0200 | [diff] [blame] | 836 | |
| 837 | return ms; |
| 838 | } |
| 839 | |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 840 | /* |
| 841 | * PDCH code below. TODO: move to a separate file |
| 842 | */ |
| 843 | |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 844 | void gprs_rlcmac_pdch::enable() |
| 845 | { |
| 846 | /* TODO: Check if there are still allocated resources.. */ |
| 847 | INIT_LLIST_HEAD(&paging_list); |
| 848 | m_is_enabled = 1; |
| 849 | } |
| 850 | |
| 851 | void gprs_rlcmac_pdch::disable() |
| 852 | { |
| 853 | /* TODO.. kick free_resources once we know the TRX/TS we are on */ |
| 854 | m_is_enabled = 0; |
| 855 | } |
| 856 | |
Holger Hans Peter Freyther | 09ef27a | 2013-10-20 16:37:05 +0200 | [diff] [blame] | 857 | void gprs_rlcmac_pdch::free_resources() |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 858 | { |
| 859 | struct gprs_rlcmac_paging *pag; |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 860 | |
| 861 | /* we are not enabled. there should be no resources */ |
| 862 | if (!is_enabled()) |
| 863 | return; |
| 864 | |
| 865 | /* kick all TBF on slot */ |
| 866 | gprs_rlcmac_tbf::free_all(this); |
| 867 | |
| 868 | /* flush all pending paging messages */ |
Holger Hans Peter Freyther | 24e98d0 | 2013-10-19 18:15:44 +0200 | [diff] [blame] | 869 | while ((pag = dequeue_paging())) |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 870 | talloc_free(pag); |
| 871 | |
Holger Hans Peter Freyther | 09ef27a | 2013-10-20 16:37:05 +0200 | [diff] [blame] | 872 | trx->bts->sba()->free_resources(this); |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 873 | } |
Holger Hans Peter Freyther | 24e98d0 | 2013-10-19 18:15:44 +0200 | [diff] [blame] | 874 | |
| 875 | struct gprs_rlcmac_paging *gprs_rlcmac_pdch::dequeue_paging() |
| 876 | { |
| 877 | struct gprs_rlcmac_paging *pag; |
| 878 | |
| 879 | if (llist_empty(&paging_list)) |
| 880 | return NULL; |
| 881 | pag = llist_entry(paging_list.next, struct gprs_rlcmac_paging, list); |
| 882 | llist_del(&pag->list); |
| 883 | |
| 884 | return pag; |
| 885 | } |
| 886 | |
| 887 | struct msgb *gprs_rlcmac_pdch::packet_paging_request() |
| 888 | { |
| 889 | struct gprs_rlcmac_paging *pag; |
| 890 | struct msgb *msg; |
| 891 | unsigned wp = 0, len; |
| 892 | |
| 893 | /* no paging, no message */ |
| 894 | pag = dequeue_paging(); |
| 895 | if (!pag) |
| 896 | return NULL; |
| 897 | |
| 898 | LOGP(DRLCMAC, LOGL_DEBUG, "Scheduling paging\n"); |
| 899 | |
| 900 | /* alloc message */ |
| 901 | msg = msgb_alloc(23, "pag ctrl block"); |
| 902 | if (!msg) { |
| 903 | talloc_free(pag); |
| 904 | return NULL; |
| 905 | } |
Alexander Couzens | ccde5c9 | 2017-02-04 03:10:08 +0100 | [diff] [blame] | 906 | bitvec *pag_vec = bitvec_alloc(23, tall_pcu_ctx); |
Holger Hans Peter Freyther | 24e98d0 | 2013-10-19 18:15:44 +0200 | [diff] [blame] | 907 | if (!pag_vec) { |
| 908 | msgb_free(msg); |
| 909 | talloc_free(pag); |
| 910 | return NULL; |
| 911 | } |
Holger Hans Peter Freyther | 63f29d6 | 2013-10-19 19:04:03 +0200 | [diff] [blame] | 912 | wp = Encoding::write_packet_paging_request(pag_vec); |
Holger Hans Peter Freyther | 24e98d0 | 2013-10-19 18:15:44 +0200 | [diff] [blame] | 913 | |
| 914 | /* loop until message is full */ |
| 915 | while (pag) { |
| 916 | /* try to add paging */ |
| 917 | if ((pag->identity_lv[1] & 0x07) == 4) { |
| 918 | /* TMSI */ |
| 919 | LOGP(DRLCMAC, LOGL_DEBUG, "- TMSI=0x%08x\n", |
| 920 | ntohl(*((uint32_t *)(pag->identity_lv + 1)))); |
| 921 | len = 1 + 1 + 1 + 32 + 2 + 1; |
| 922 | if (pag->identity_lv[0] != 5) { |
| 923 | LOGP(DRLCMAC, LOGL_ERROR, "TMSI paging with " |
| 924 | "MI != 5 octets!\n"); |
| 925 | goto continue_next; |
| 926 | } |
| 927 | } else { |
| 928 | /* MI */ |
| 929 | LOGP(DRLCMAC, LOGL_DEBUG, "- MI=%s\n", |
| 930 | osmo_hexdump(pag->identity_lv + 1, |
| 931 | pag->identity_lv[0])); |
| 932 | len = 1 + 1 + 1 + 4 + (pag->identity_lv[0]<<3) + 2 + 1; |
| 933 | if (pag->identity_lv[0] > 8) { |
| 934 | LOGP(DRLCMAC, LOGL_ERROR, "Paging with " |
| 935 | "MI > 8 octets!\n"); |
| 936 | goto continue_next; |
| 937 | } |
| 938 | } |
| 939 | if (wp + len > 184) { |
| 940 | LOGP(DRLCMAC, LOGL_DEBUG, "- Does not fit, so schedule " |
| 941 | "next time\n"); |
| 942 | /* put back paging record, because does not fit */ |
| 943 | llist_add_tail(&pag->list, &paging_list); |
| 944 | break; |
| 945 | } |
Holger Hans Peter Freyther | 63f29d6 | 2013-10-19 19:04:03 +0200 | [diff] [blame] | 946 | Encoding::write_repeated_page_info(pag_vec, wp, pag->identity_lv[0], |
Holger Hans Peter Freyther | 24e98d0 | 2013-10-19 18:15:44 +0200 | [diff] [blame] | 947 | pag->identity_lv + 1, pag->chan_needed); |
| 948 | |
| 949 | continue_next: |
| 950 | talloc_free(pag); |
| 951 | pag = dequeue_paging(); |
| 952 | } |
| 953 | |
| 954 | bitvec_pack(pag_vec, msgb_put(msg, 23)); |
| 955 | RlcMacDownlink_t * mac_control_block = (RlcMacDownlink_t *)talloc_zero(tall_pcu_ctx, RlcMacDownlink_t); |
| 956 | LOGP(DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ TX : Packet Paging Request +++++++++++++++++++++++++\n"); |
| 957 | decode_gsm_rlcmac_downlink(pag_vec, mac_control_block); |
| 958 | LOGPC(DCSN1, LOGL_NOTICE, "\n"); |
| 959 | LOGP(DRLCMAC, LOGL_DEBUG, "------------------------- TX : Packet Paging Request -------------------------\n"); |
| 960 | bitvec_free(pag_vec); |
| 961 | talloc_free(mac_control_block); |
| 962 | |
| 963 | return msg; |
| 964 | } |
| 965 | |
Holger Hans Peter Freyther | f098489 | 2013-10-19 18:28:59 +0200 | [diff] [blame] | 966 | void gprs_rlcmac_pdch::add_paging(struct gprs_rlcmac_paging *pag) |
| 967 | { |
| 968 | llist_add(&pag->list, &paging_list); |
| 969 | } |
Holger Hans Peter Freyther | 9ae367f | 2013-10-26 16:42:38 +0200 | [diff] [blame] | 970 | |
Holger Hans Peter Freyther | e1a075a | 2013-10-27 13:35:30 +0100 | [diff] [blame] | 971 | void gprs_rlcmac_pdch::rcv_control_ack(Packet_Control_Acknowledgement_t *packet, uint32_t fn) |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 972 | { |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 973 | struct gprs_rlcmac_tbf *tbf, *new_tbf; |
Max | 127a1e0 | 2017-01-12 11:37:58 +0100 | [diff] [blame] | 974 | uint32_t tlli = packet->TLLI; |
| 975 | GprsMs *ms = bts()->ms_by_tlli(tlli); |
Max | fd13f6c | 2017-07-07 14:29:36 +0200 | [diff] [blame] | 976 | gprs_rlcmac_ul_tbf *ul_tbf; |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 977 | |
Daniel Willmann | febf1a0 | 2014-07-02 17:58:16 +0200 | [diff] [blame] | 978 | tbf = bts()->ul_tbf_by_poll_fn(fn, trx_no(), ts_no); |
| 979 | if (!tbf) |
| 980 | tbf = bts()->dl_tbf_by_poll_fn(fn, trx_no(), ts_no); |
| 981 | |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 982 | if (!tbf) { |
| 983 | LOGP(DRLCMAC, LOGL_NOTICE, "PACKET CONTROL ACK with " |
Holger Hans Peter Freyther | 15bb1a2 | 2013-10-27 12:30:46 +0100 | [diff] [blame] | 984 | "unknown FN=%u TLLI=0x%08x (TRX %d TS %d)\n", |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 985 | fn, tlli, trx_no(), ts_no); |
Max | 127a1e0 | 2017-01-12 11:37:58 +0100 | [diff] [blame] | 986 | if (ms) |
| 987 | LOGP(DRLCMAC, LOGL_NOTICE, "PACKET CONTROL ACK with " |
| 988 | "unknown TBF corresponds to MS with IMSI %s, TA %d, " |
Max | e8284a7 | 2017-05-18 12:38:41 +0200 | [diff] [blame] | 989 | "uTBF (TFI=%d, state=%s), dTBF (TFI=%d, state=%s)\n", |
Max | 127a1e0 | 2017-01-12 11:37:58 +0100 | [diff] [blame] | 990 | ms->imsi(), ms->ta(), |
| 991 | ms->ul_tbf() ? ms->ul_tbf()->tfi() : 0, |
| 992 | ms->ul_tbf() ? ms->ul_tbf()->state_name() : "None", |
| 993 | ms->dl_tbf() ? ms->dl_tbf()->tfi() : 0, |
| 994 | ms->dl_tbf() ? ms->dl_tbf()->state_name() : "None"); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 995 | return; |
| 996 | } |
Jacob Erlbeck | d3eac28 | 2015-05-22 15:47:55 +0200 | [diff] [blame] | 997 | tbf->update_ms(tlli, GPRS_RLCMAC_UL_TBF); |
Jacob Erlbeck | fecece0 | 2015-05-08 12:13:08 +0200 | [diff] [blame] | 998 | |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 999 | LOGP(DRLCMAC, LOGL_DEBUG, "RX: [PCU <- BTS] %s Packet Control Ack\n", tbf_name(tbf)); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 1000 | tbf->poll_state = GPRS_RLCMAC_POLL_NONE; |
| 1001 | |
| 1002 | /* check if this control ack belongs to packet uplink ack */ |
Max | fd13f6c | 2017-07-07 14:29:36 +0200 | [diff] [blame] | 1003 | ul_tbf = as_ul_tbf(tbf); |
| 1004 | if (ul_tbf && ul_tbf->handle_ctrl_ack()) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 1005 | LOGP(DRLCMAC, LOGL_DEBUG, "TBF: [UPLINK] END %s\n", tbf_name(tbf)); |
Max | fd13f6c | 2017-07-07 14:29:36 +0200 | [diff] [blame] | 1006 | if (ul_tbf->ctrl_ack_to_toggle()) |
| 1007 | LOGP(DRLCMAC, LOGL_NOTICE, "Recovered uplink ack for UL %s\n", tbf_name(tbf)); |
| 1008 | |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 1009 | tbf_free(tbf); |
| 1010 | return; |
| 1011 | } |
| 1012 | if (tbf->dl_ass_state == GPRS_RLCMAC_DL_ASS_WAIT_ACK) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 1013 | LOGP(DRLCMAC, LOGL_DEBUG, "TBF: [UPLINK] DOWNLINK ASSIGNED %s\n", tbf_name(tbf)); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 1014 | /* reset N3105 */ |
| 1015 | tbf->n3105 = 0; |
| 1016 | tbf->dl_ass_state = GPRS_RLCMAC_DL_ASS_NONE; |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 1017 | |
Jacob Erlbeck | d3eac28 | 2015-05-22 15:47:55 +0200 | [diff] [blame] | 1018 | new_tbf = tbf->ms() ? tbf->ms()->dl_tbf() : NULL; |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 1019 | if (!new_tbf) { |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 1020 | LOGP(DRLCMAC, LOGL_ERROR, "Got ACK, but DL " |
Holger Hans Peter Freyther | 875fc89 | 2013-10-27 13:35:46 +0100 | [diff] [blame] | 1021 | "TBF is gone TLLI=0x%08x\n", tlli); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 1022 | return; |
| 1023 | } |
Jacob Erlbeck | 7d5157e | 2016-02-01 18:15:35 +0100 | [diff] [blame] | 1024 | if (tbf->state_is(GPRS_RLCMAC_WAIT_RELEASE) && |
| 1025 | tbf->direction == new_tbf->direction) |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 1026 | tbf_free(tbf); |
| 1027 | |
Jacob Erlbeck | 9876a3b | 2016-01-29 18:51:04 +0100 | [diff] [blame] | 1028 | if ((new_tbf->state_flags & (1 << GPRS_RLCMAC_FLAG_CCCH))) { |
| 1029 | /* We now know that the PACCH really existed */ |
| 1030 | LOGP(DRLCMAC, LOGL_INFO, |
| 1031 | "The TBF has been confirmed on the PACCH, " |
| 1032 | "changed type from CCCH to PACCH for %s\n", |
| 1033 | tbf_name(new_tbf)); |
| 1034 | new_tbf->state_flags &= ~(1 << GPRS_RLCMAC_FLAG_CCCH); |
| 1035 | new_tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_PACCH); |
| 1036 | } |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 1037 | new_tbf->set_state(GPRS_RLCMAC_FLOW); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 1038 | /* stop pending assignment timer */ |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 1039 | new_tbf->stop_timer(); |
| 1040 | if ((new_tbf->state_flags & |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 1041 | (1 << GPRS_RLCMAC_FLAG_TO_DL_ASS))) { |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 1042 | new_tbf->state_flags &= |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 1043 | ~(1 << GPRS_RLCMAC_FLAG_TO_DL_ASS); |
| 1044 | LOGP(DRLCMAC, LOGL_NOTICE, "Recovered downlink " |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 1045 | "assignment for %s\n", tbf_name(new_tbf)); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 1046 | } |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 1047 | tbf_assign_control_ts(new_tbf); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 1048 | return; |
| 1049 | } |
| 1050 | if (tbf->ul_ass_state == GPRS_RLCMAC_UL_ASS_WAIT_ACK) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 1051 | LOGP(DRLCMAC, LOGL_DEBUG, "TBF: [DOWNLINK] UPLINK ASSIGNED %s\n", tbf_name(tbf)); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 1052 | /* reset N3105 */ |
| 1053 | tbf->n3105 = 0; |
| 1054 | tbf->ul_ass_state = GPRS_RLCMAC_UL_ASS_NONE; |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 1055 | |
Jacob Erlbeck | d3eac28 | 2015-05-22 15:47:55 +0200 | [diff] [blame] | 1056 | new_tbf = tbf->ms() ? tbf->ms()->ul_tbf() : NULL; |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 1057 | if (!new_tbf) { |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 1058 | LOGP(DRLCMAC, LOGL_ERROR, "Got ACK, but UL " |
Holger Hans Peter Freyther | 8d0e489 | 2013-10-27 12:42:58 +0100 | [diff] [blame] | 1059 | "TBF is gone TLLI=0x%08x\n", tlli); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 1060 | return; |
| 1061 | } |
Jacob Erlbeck | 7d5157e | 2016-02-01 18:15:35 +0100 | [diff] [blame] | 1062 | if (tbf->state_is(GPRS_RLCMAC_WAIT_RELEASE) && |
| 1063 | tbf->direction == new_tbf->direction) |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 1064 | tbf_free(tbf); |
| 1065 | |
| 1066 | new_tbf->set_state(GPRS_RLCMAC_FLOW); |
| 1067 | if ((new_tbf->state_flags & |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 1068 | (1 << GPRS_RLCMAC_FLAG_TO_UL_ASS))) { |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 1069 | new_tbf->state_flags &= |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 1070 | ~(1 << GPRS_RLCMAC_FLAG_TO_UL_ASS); |
| 1071 | LOGP(DRLCMAC, LOGL_NOTICE, "Recovered uplink " |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 1072 | "assignment for UL %s\n", tbf_name(new_tbf)); |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 1073 | } |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 1074 | tbf_assign_control_ts(new_tbf); |
Jacob Erlbeck | c8cbfc2 | 2015-09-01 11:38:40 +0200 | [diff] [blame] | 1075 | /* there might be LLC packets waiting in the queue, but the DL |
| 1076 | * TBF might have been released while the UL TBF has been |
| 1077 | * established */ |
| 1078 | if (new_tbf->ms()->need_dl_tbf()) |
| 1079 | new_tbf->establish_dl_tbf_on_pacch(); |
| 1080 | |
Holger Hans Peter Freyther | 396f416 | 2013-10-27 11:02:05 +0100 | [diff] [blame] | 1081 | return; |
| 1082 | } |
| 1083 | LOGP(DRLCMAC, LOGL_ERROR, "Error: received PACET CONTROL ACK " |
| 1084 | "at no request\n"); |
| 1085 | } |
| 1086 | |
Jacob Erlbeck | 51b1151 | 2015-06-11 16:54:50 +0200 | [diff] [blame] | 1087 | static void get_rx_qual_meas(struct pcu_l1_meas *meas, uint8_t rx_qual_enc) |
| 1088 | { |
| 1089 | static const int16_t rx_qual_map[] = { |
| 1090 | 0, /* 0,14 % */ |
| 1091 | 0, /* 0,28 % */ |
| 1092 | 1, /* 0,57 % */ |
| 1093 | 1, /* 1,13 % */ |
| 1094 | 2, /* 2,26 % */ |
| 1095 | 5, /* 4,53 % */ |
| 1096 | 9, /* 9,05 % */ |
| 1097 | 18, /* 18,10 % */ |
| 1098 | }; |
| 1099 | |
| 1100 | meas->set_ms_rx_qual(rx_qual_map[ |
| 1101 | OSMO_MIN(rx_qual_enc, ARRAY_SIZE(rx_qual_map)-1) |
| 1102 | ]); |
| 1103 | } |
| 1104 | |
| 1105 | static void get_meas(struct pcu_l1_meas *meas, |
| 1106 | const Packet_Resource_Request_t *qr) |
| 1107 | { |
| 1108 | unsigned i; |
| 1109 | |
| 1110 | meas->set_ms_c_value(qr->C_VALUE); |
| 1111 | if (qr->Exist_SIGN_VAR) |
| 1112 | meas->set_ms_sign_var((qr->SIGN_VAR + 2) / 4); /* SIGN_VAR * 0.25 dB */ |
| 1113 | |
| 1114 | for (i = 0; i < OSMO_MIN(ARRAY_SIZE(qr->Slot), ARRAY_SIZE(meas->ts)); i++) |
| 1115 | { |
Jacob Erlbeck | da1a79e | 2015-06-11 18:09:00 +0200 | [diff] [blame] | 1116 | if (qr->Slot[i].Exist) { |
| 1117 | LOGP(DRLCMAC, LOGL_INFO, |
| 1118 | "Packet resource request: i_level[%d] = %d\n", |
| 1119 | i, qr->Slot[i].I_LEVEL); |
Jacob Erlbeck | 51b1151 | 2015-06-11 16:54:50 +0200 | [diff] [blame] | 1120 | meas->set_ms_i_level(i, -2 * qr->Slot[i].I_LEVEL); |
Jacob Erlbeck | da1a79e | 2015-06-11 18:09:00 +0200 | [diff] [blame] | 1121 | } |
Jacob Erlbeck | 51b1151 | 2015-06-11 16:54:50 +0200 | [diff] [blame] | 1122 | } |
| 1123 | } |
| 1124 | |
| 1125 | static void get_meas(struct pcu_l1_meas *meas, |
| 1126 | const Channel_Quality_Report_t *qr) |
| 1127 | { |
| 1128 | unsigned i; |
| 1129 | |
| 1130 | get_rx_qual_meas(meas, qr->RXQUAL); |
| 1131 | meas->set_ms_c_value(qr->C_VALUE); |
| 1132 | meas->set_ms_sign_var((qr->SIGN_VAR + 2) / 4); /* SIGN_VAR * 0.25 dB */ |
| 1133 | |
| 1134 | for (i = 0; i < OSMO_MIN(ARRAY_SIZE(qr->Slot), ARRAY_SIZE(meas->ts)); i++) |
| 1135 | { |
Jacob Erlbeck | da1a79e | 2015-06-11 18:09:00 +0200 | [diff] [blame] | 1136 | if (qr->Slot[i].Exist) { |
| 1137 | LOGP(DRLCMAC, LOGL_INFO, |
| 1138 | "Channel quality report: i_level[%d] = %d\n", |
| 1139 | i, qr->Slot[i].I_LEVEL_TN); |
Jacob Erlbeck | 51b1151 | 2015-06-11 16:54:50 +0200 | [diff] [blame] | 1140 | meas->set_ms_i_level(i, -2 * qr->Slot[i].I_LEVEL_TN); |
Jacob Erlbeck | da1a79e | 2015-06-11 18:09:00 +0200 | [diff] [blame] | 1141 | } |
Jacob Erlbeck | 51b1151 | 2015-06-11 16:54:50 +0200 | [diff] [blame] | 1142 | } |
| 1143 | } |
| 1144 | |
Max | 341dccd | 2017-08-14 15:49:59 +0200 | [diff] [blame] | 1145 | static inline void sched_ul_ass_or_rej(BTS *bts, gprs_rlcmac_bts *bts_data, struct gprs_rlcmac_dl_tbf *tbf) |
| 1146 | { |
| 1147 | bts->channel_request_description(); |
| 1148 | |
| 1149 | /* This call will register the new TBF with the MS on success */ |
| 1150 | gprs_rlcmac_ul_tbf *ul_tbf = tbf_alloc_ul(bts_data, tbf->trx->trx_no, tbf->ms_class(), |
| 1151 | tbf->ms()->egprs_ms_class(), tbf->tlli(), tbf->ta(), tbf->ms()); |
| 1152 | |
| 1153 | /* schedule uplink assignment or reject */ |
| 1154 | if (ul_tbf) { |
| 1155 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF in ack message, so we provide one:\n"); |
| 1156 | tbf->ul_ass_state = GPRS_RLCMAC_UL_ASS_SEND_ASS; |
| 1157 | } else { |
| 1158 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF in ack message, so we packet access reject:\n"); |
| 1159 | tbf->ul_ass_state = GPRS_RLCMAC_UL_ASS_SEND_ASS_REJ; |
| 1160 | } |
| 1161 | } |
| 1162 | |
Holger Hans Peter Freyther | 5da2014 | 2013-10-27 11:41:01 +0100 | [diff] [blame] | 1163 | void gprs_rlcmac_pdch::rcv_control_dl_ack_nack(Packet_Downlink_Ack_Nack_t *ack_nack, uint32_t fn) |
Holger Hans Peter Freyther | 5a96581 | 2013-10-27 11:07:17 +0100 | [diff] [blame] | 1164 | { |
| 1165 | int8_t tfi = 0; /* must be signed */ |
Daniel Willmann | 6c813fc | 2014-07-30 19:12:27 +0200 | [diff] [blame] | 1166 | struct gprs_rlcmac_dl_tbf *tbf; |
Holger Hans Peter Freyther | 5a96581 | 2013-10-27 11:07:17 +0100 | [diff] [blame] | 1167 | int rc; |
Jacob Erlbeck | 51b1151 | 2015-06-11 16:54:50 +0200 | [diff] [blame] | 1168 | struct pcu_l1_meas meas; |
Jacob Erlbeck | 419b034 | 2016-01-14 13:40:01 +0100 | [diff] [blame] | 1169 | int num_blocks; |
| 1170 | uint8_t bits_data[RLC_GPRS_WS/8]; |
| 1171 | bitvec bits; |
| 1172 | int bsn_begin, bsn_end; |
| 1173 | char show_bits[RLC_GPRS_WS + 1]; |
Holger Hans Peter Freyther | 5a96581 | 2013-10-27 11:07:17 +0100 | [diff] [blame] | 1174 | |
Holger Hans Peter Freyther | 5da2014 | 2013-10-27 11:41:01 +0100 | [diff] [blame] | 1175 | tfi = ack_nack->DOWNLINK_TFI; |
Daniel Willmann | febf1a0 | 2014-07-02 17:58:16 +0200 | [diff] [blame] | 1176 | tbf = bts()->dl_tbf_by_poll_fn(fn, trx_no(), ts_no); |
Holger Hans Peter Freyther | 5a96581 | 2013-10-27 11:07:17 +0100 | [diff] [blame] | 1177 | if (!tbf) { |
| 1178 | LOGP(DRLCMAC, LOGL_NOTICE, "PACKET DOWNLINK ACK with " |
| 1179 | "unknown FN=%u TFI=%d (TRX %d TS %d)\n", |
| 1180 | fn, tfi, trx_no(), ts_no); |
| 1181 | return; |
| 1182 | } |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1183 | if (tbf->tfi() != tfi) { |
Holger Hans Peter Freyther | 5a96581 | 2013-10-27 11:07:17 +0100 | [diff] [blame] | 1184 | LOGP(DRLCMAC, LOGL_NOTICE, "PACKET DOWNLINK ACK with " |
| 1185 | "wrong TFI=%d, ignoring!\n", tfi); |
| 1186 | return; |
| 1187 | } |
Max | aae1bfb | 2017-07-07 13:49:29 +0200 | [diff] [blame] | 1188 | |
| 1189 | if (tbf->handle_ack_nack()) |
| 1190 | LOGP(DRLCMAC, LOGL_NOTICE, "Recovered downlink ack for %s\n", tbf_name(tbf)); |
| 1191 | |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 1192 | LOGP(DRLCMAC, LOGL_DEBUG, "RX: [PCU <- BTS] %s Packet Downlink Ack/Nack\n", tbf_name(tbf)); |
Holger Hans Peter Freyther | 5a96581 | 2013-10-27 11:07:17 +0100 | [diff] [blame] | 1193 | |
Jacob Erlbeck | 419b034 | 2016-01-14 13:40:01 +0100 | [diff] [blame] | 1194 | bits.data = bits_data; |
| 1195 | bits.data_len = sizeof(bits_data); |
| 1196 | bits.cur_bit = 0; |
| 1197 | |
| 1198 | num_blocks = Decoding::decode_gprs_acknack_bits( |
| 1199 | &ack_nack->Ack_Nack_Description, &bits, |
| 1200 | &bsn_begin, &bsn_end, &tbf->m_window); |
| 1201 | |
| 1202 | LOGP(DRLCMAC, LOGL_DEBUG, |
| 1203 | "Got GPRS DL ACK bitmap: SSN: %d, BSN %d to %d - 1 (%d blocks), " |
| 1204 | "\"%s\"\n", |
| 1205 | ack_nack->Ack_Nack_Description.STARTING_SEQUENCE_NUMBER, |
| 1206 | bsn_begin, bsn_end, num_blocks, |
| 1207 | (Decoding::extract_rbb(&bits, show_bits), show_bits)); |
| 1208 | |
Daniel Willmann | fc03bbe | 2014-05-30 17:57:59 +0200 | [diff] [blame] | 1209 | rc = tbf->rcvd_dl_ack( |
Holger Hans Peter Freyther | 5da2014 | 2013-10-27 11:41:01 +0100 | [diff] [blame] | 1210 | ack_nack->Ack_Nack_Description.FINAL_ACK_INDICATION, |
Jacob Erlbeck | 419b034 | 2016-01-14 13:40:01 +0100 | [diff] [blame] | 1211 | bsn_begin, &bits); |
Holger Hans Peter Freyther | 5a96581 | 2013-10-27 11:07:17 +0100 | [diff] [blame] | 1212 | if (rc == 1) { |
| 1213 | tbf_free(tbf); |
| 1214 | return; |
| 1215 | } |
| 1216 | /* check for channel request */ |
Max | 341dccd | 2017-08-14 15:49:59 +0200 | [diff] [blame] | 1217 | if (ack_nack->Exist_Channel_Request_Description) |
| 1218 | sched_ul_ass_or_rej(bts(), bts_data(), tbf); |
Jacob Erlbeck | d3eac28 | 2015-05-22 15:47:55 +0200 | [diff] [blame] | 1219 | |
Jacob Erlbeck | 51b1151 | 2015-06-11 16:54:50 +0200 | [diff] [blame] | 1220 | /* get measurements */ |
| 1221 | if (tbf->ms()) { |
| 1222 | get_meas(&meas, &ack_nack->Channel_Quality_Report); |
| 1223 | tbf->ms()->update_l1_meas(&meas); |
| 1224 | } |
Holger Hans Peter Freyther | 5a96581 | 2013-10-27 11:07:17 +0100 | [diff] [blame] | 1225 | } |
| 1226 | |
Jacob Erlbeck | ae9c575 | 2016-01-13 13:55:44 +0100 | [diff] [blame] | 1227 | void gprs_rlcmac_pdch::rcv_control_egprs_dl_ack_nack(EGPRS_PD_AckNack_t *ack_nack, uint32_t fn) |
| 1228 | { |
| 1229 | int8_t tfi = 0; /* must be signed */ |
| 1230 | struct gprs_rlcmac_dl_tbf *tbf; |
| 1231 | struct pcu_l1_meas meas; |
| 1232 | int rc; |
| 1233 | int num_blocks; |
| 1234 | uint8_t bits_data[RLC_EGPRS_MAX_WS/8]; |
| 1235 | char show_bits[RLC_EGPRS_MAX_WS + 1]; |
| 1236 | bitvec bits; |
| 1237 | int bsn_begin, bsn_end; |
| 1238 | |
| 1239 | tfi = ack_nack->DOWNLINK_TFI; |
| 1240 | tbf = bts()->dl_tbf_by_poll_fn(fn, trx_no(), ts_no); |
| 1241 | if (!tbf) { |
| 1242 | LOGP(DRLCMAC, LOGL_NOTICE, "EGPRS PACKET DOWNLINK ACK with " |
| 1243 | "unknown FN=%u TFI=%d (TRX %d TS %d)\n", |
| 1244 | fn, tfi, trx_no(), ts_no); |
| 1245 | return; |
| 1246 | } |
| 1247 | if (tbf->tfi() != tfi) { |
| 1248 | LOGP(DRLCMAC, LOGL_NOTICE, "EGPRS PACKET DOWNLINK ACK with " |
| 1249 | "wrong TFI=%d, ignoring!\n", tfi); |
| 1250 | return; |
| 1251 | } |
Max | aae1bfb | 2017-07-07 13:49:29 +0200 | [diff] [blame] | 1252 | |
| 1253 | if (tbf->handle_ack_nack()) |
| 1254 | LOGP(DRLCMAC, LOGL_NOTICE, "Recovered EGPRS downlink ack for %s\n", tbf_name(tbf)); |
| 1255 | |
Jacob Erlbeck | ae9c575 | 2016-01-13 13:55:44 +0100 | [diff] [blame] | 1256 | LOGP(DRLCMAC, LOGL_DEBUG, |
| 1257 | "RX: [PCU <- BTS] %s EGPRS Packet Downlink Ack/Nack\n", |
| 1258 | tbf_name(tbf)); |
Jacob Erlbeck | ae9c575 | 2016-01-13 13:55:44 +0100 | [diff] [blame] | 1259 | |
| 1260 | LOGP(DRLCMAC, LOGL_DEBUG, "EGPRS ACK/NACK: " |
| 1261 | "ut: %d, final: %d, bow: %d, eow: %d, ssn: %d, have_crbb: %d, " |
| 1262 | "urbb_len:%d, %p, %p, %d, %d, win: %d-%d, urbb: %s\n", |
| 1263 | (int)ack_nack->EGPRS_AckNack.UnionType, |
| 1264 | (int)ack_nack->EGPRS_AckNack.Desc.FINAL_ACK_INDICATION, |
| 1265 | (int)ack_nack->EGPRS_AckNack.Desc.BEGINNING_OF_WINDOW, |
| 1266 | (int)ack_nack->EGPRS_AckNack.Desc.END_OF_WINDOW, |
| 1267 | (int)ack_nack->EGPRS_AckNack.Desc.STARTING_SEQUENCE_NUMBER, |
| 1268 | (int)ack_nack->EGPRS_AckNack.Desc.Exist_CRBB, |
| 1269 | (int)ack_nack->EGPRS_AckNack.Desc.URBB_LENGTH, |
| 1270 | (void *)&ack_nack->EGPRS_AckNack.UnionType, |
| 1271 | (void *)&ack_nack->EGPRS_AckNack.Desc, |
| 1272 | (int)offsetof(EGPRS_AckNack_t, Desc), |
| 1273 | (int)offsetof(EGPRS_AckNack_w_len_t, Desc), |
| 1274 | tbf->m_window.v_a(), |
| 1275 | tbf->m_window.v_s(), |
| 1276 | osmo_hexdump((const uint8_t *)&ack_nack->EGPRS_AckNack.Desc.URBB, |
| 1277 | sizeof(ack_nack->EGPRS_AckNack.Desc.URBB))); |
| 1278 | |
| 1279 | bits.data = bits_data; |
| 1280 | bits.data_len = sizeof(bits_data); |
| 1281 | bits.cur_bit = 0; |
| 1282 | |
| 1283 | num_blocks = Decoding::decode_egprs_acknack_bits( |
| 1284 | &ack_nack->EGPRS_AckNack.Desc, &bits, |
| 1285 | &bsn_begin, &bsn_end, &tbf->m_window); |
| 1286 | |
Jacob Erlbeck | ae9c575 | 2016-01-13 13:55:44 +0100 | [diff] [blame] | 1287 | LOGP(DRLCMAC, LOGL_DEBUG, |
Jacob Erlbeck | d7630f2 | 2016-01-14 18:05:44 +0100 | [diff] [blame] | 1288 | "Got EGPRS DL ACK bitmap: SSN: %d, BSN %d to %d - 1 (%d blocks), " |
| 1289 | "\"%s\"\n", |
| 1290 | ack_nack->EGPRS_AckNack.Desc.STARTING_SEQUENCE_NUMBER, |
| 1291 | bsn_begin, bsn_end, num_blocks, |
| 1292 | (Decoding::extract_rbb(&bits, show_bits), show_bits) |
| 1293 | ); |
Jacob Erlbeck | ae9c575 | 2016-01-13 13:55:44 +0100 | [diff] [blame] | 1294 | |
Jacob Erlbeck | d7630f2 | 2016-01-14 18:05:44 +0100 | [diff] [blame] | 1295 | rc = tbf->rcvd_dl_ack( |
| 1296 | ack_nack->EGPRS_AckNack.Desc.FINAL_ACK_INDICATION, |
| 1297 | bsn_begin, &bits); |
| 1298 | if (rc == 1) { |
| 1299 | tbf_free(tbf); |
| 1300 | return; |
Jacob Erlbeck | ae9c575 | 2016-01-13 13:55:44 +0100 | [diff] [blame] | 1301 | } |
| 1302 | |
| 1303 | /* check for channel request */ |
Max | 341dccd | 2017-08-14 15:49:59 +0200 | [diff] [blame] | 1304 | if (ack_nack->Exist_ChannelRequestDescription) |
| 1305 | sched_ul_ass_or_rej(bts(), bts_data(), tbf); |
Jacob Erlbeck | ae9c575 | 2016-01-13 13:55:44 +0100 | [diff] [blame] | 1306 | |
| 1307 | /* get measurements */ |
| 1308 | if (tbf->ms()) { |
| 1309 | /* TODO: Implement Measurements parsing for EGPRS */ |
| 1310 | /* |
| 1311 | get_meas(&meas, &ack_nack->Channel_Quality_Report); |
| 1312 | tbf->ms()->update_l1_meas(&meas); |
| 1313 | */ |
| 1314 | } |
| 1315 | } |
| 1316 | |
Holger Hans Peter Freyther | 7a34471 | 2013-10-27 11:37:53 +0100 | [diff] [blame] | 1317 | void gprs_rlcmac_pdch::rcv_resource_request(Packet_Resource_Request_t *request, uint32_t fn) |
Holger Hans Peter Freyther | fcbc702 | 2013-10-26 17:38:37 +0200 | [diff] [blame] | 1318 | { |
Holger Hans Peter Freyther | fcbc702 | 2013-10-26 17:38:37 +0200 | [diff] [blame] | 1319 | struct gprs_rlcmac_sba *sba; |
Holger Hans Peter Freyther | fcbc702 | 2013-10-26 17:38:37 +0200 | [diff] [blame] | 1320 | |
Holger Hans Peter Freyther | 7a34471 | 2013-10-27 11:37:53 +0100 | [diff] [blame] | 1321 | if (request->ID.UnionType) { |
Jacob Erlbeck | e43460b | 2015-05-13 13:33:12 +0200 | [diff] [blame] | 1322 | struct gprs_rlcmac_ul_tbf *ul_tbf = NULL; |
| 1323 | struct gprs_rlcmac_dl_tbf *dl_tbf = NULL; |
Holger Hans Peter Freyther | 8021644 | 2013-10-27 15:42:25 +0100 | [diff] [blame] | 1324 | uint32_t tlli = request->ID.u.TLLI; |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 1325 | uint8_t ms_class = 0; |
Jacob Erlbeck | c3c5804 | 2015-09-28 17:55:32 +0200 | [diff] [blame] | 1326 | uint8_t egprs_ms_class = 0; |
Max | 9bbe160 | 2016-07-18 12:50:18 +0200 | [diff] [blame] | 1327 | uint8_t ta = GSM48_TA_INVALID; |
Jacob Erlbeck | 51b1151 | 2015-06-11 16:54:50 +0200 | [diff] [blame] | 1328 | struct pcu_l1_meas meas; |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 1329 | |
Jacob Erlbeck | e43460b | 2015-05-13 13:33:12 +0200 | [diff] [blame] | 1330 | GprsMs *ms = bts()->ms_by_tlli(tlli); |
| 1331 | /* Keep the ms, even if it gets idle temporarily */ |
| 1332 | GprsMs::Guard guard(ms); |
| 1333 | |
| 1334 | if (ms) { |
| 1335 | ul_tbf = ms->ul_tbf(); |
| 1336 | dl_tbf = ms->dl_tbf(); |
Jacob Erlbeck | 9200ce6 | 2015-05-22 17:48:04 +0200 | [diff] [blame] | 1337 | ta = ms->ta(); |
Jacob Erlbeck | e43460b | 2015-05-13 13:33:12 +0200 | [diff] [blame] | 1338 | } |
| 1339 | |
Jacob Erlbeck | 5f93f85 | 2016-01-21 20:48:39 +0100 | [diff] [blame] | 1340 | /* We got a RACH so the MS was in packet idle mode and thus |
| 1341 | * didn't have any active TBFs */ |
Daniel Willmann | 0d12a2f | 2014-07-10 17:44:07 +0200 | [diff] [blame] | 1342 | if (ul_tbf) { |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 1343 | LOGP(DRLCMACUL, LOGL_NOTICE, "Got RACH from " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1344 | "TLLI=0x%08x while %s still " |
Jacob Erlbeck | 537b149 | 2015-08-21 17:52:07 +0200 | [diff] [blame] | 1345 | "exists. Killing pending UL TBF\n", |
Daniel Willmann | 0d12a2f | 2014-07-10 17:44:07 +0200 | [diff] [blame] | 1346 | tlli, tbf_name(ul_tbf)); |
| 1347 | tbf_free(ul_tbf); |
| 1348 | ul_tbf = NULL; |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 1349 | } |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 1350 | |
Jacob Erlbeck | cf6ae9d | 2015-08-31 14:32:05 +0200 | [diff] [blame] | 1351 | if (dl_tbf) { |
| 1352 | LOGP(DRLCMACUL, LOGL_NOTICE, "Got RACH from " |
| 1353 | "TLLI=0x%08x while %s still exists. " |
Jacob Erlbeck | ae0a799 | 2015-09-01 11:28:25 +0200 | [diff] [blame] | 1354 | "Release pending DL TBF\n", tlli, |
Jacob Erlbeck | cf6ae9d | 2015-08-31 14:32:05 +0200 | [diff] [blame] | 1355 | tbf_name(dl_tbf)); |
Jacob Erlbeck | 5f93f85 | 2016-01-21 20:48:39 +0100 | [diff] [blame] | 1356 | tbf_free(dl_tbf); |
| 1357 | dl_tbf = NULL; |
Jacob Erlbeck | cf6ae9d | 2015-08-31 14:32:05 +0200 | [diff] [blame] | 1358 | } |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 1359 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF " |
| 1360 | "in packet resource request of single " |
| 1361 | "block, so we provide one:\n"); |
| 1362 | sba = bts()->sba()->find(this, fn); |
| 1363 | if (!sba) { |
| 1364 | LOGP(DRLCMAC, LOGL_NOTICE, "MS requests UL TBF " |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 1365 | "in packet resource request of single " |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 1366 | "block, but there is no resource request " |
| 1367 | "scheduled!\n"); |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 1368 | } else { |
| 1369 | ta = sba->ta; |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 1370 | bts()->sba()->free_sba(sba); |
| 1371 | } |
Jacob Erlbeck | c3c5804 | 2015-09-28 17:55:32 +0200 | [diff] [blame] | 1372 | if (request->Exist_MS_Radio_Access_capability) { |
| 1373 | ms_class = Decoding::get_ms_class_by_capability( |
| 1374 | &request->MS_Radio_Access_capability); |
| 1375 | egprs_ms_class = |
| 1376 | Decoding::get_egprs_ms_class_by_capability( |
| 1377 | &request->MS_Radio_Access_capability); |
| 1378 | } |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 1379 | if (!ms_class) |
| 1380 | LOGP(DRLCMAC, LOGL_NOTICE, "MS does not give us a class.\n"); |
Jacob Erlbeck | c3c5804 | 2015-09-28 17:55:32 +0200 | [diff] [blame] | 1381 | if (egprs_ms_class) |
| 1382 | LOGP(DRLCMAC, LOGL_NOTICE, |
| 1383 | "MS supports EGPRS multislot class %d.\n", |
| 1384 | egprs_ms_class); |
Jacob Erlbeck | 86b6f05 | 2015-11-27 15:17:34 +0100 | [diff] [blame] | 1385 | ul_tbf = tbf_alloc_ul(bts_data(), trx_no(), ms_class, |
| 1386 | egprs_ms_class, tlli, ta, ms); |
aravind sirsikar | e9a138e | 2017-01-24 12:36:08 +0530 | [diff] [blame] | 1387 | |
| 1388 | if (!ul_tbf) { |
| 1389 | handle_tbf_reject(bts_data(), ms, tlli, |
| 1390 | trx_no(), ts_no); |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 1391 | return; |
aravind sirsikar | e9a138e | 2017-01-24 12:36:08 +0530 | [diff] [blame] | 1392 | } |
Daniel Willmann | e481815 | 2014-08-15 16:52:09 +0200 | [diff] [blame] | 1393 | |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 1394 | /* set control ts to current MS's TS, until assignment complete */ |
Max | f60cf62 | 2017-07-10 14:40:09 +0200 | [diff] [blame] | 1395 | LOGP(DRLCMAC, LOGL_DEBUG, "%s change control TS %d -> %d until assinment is complete.\n", |
| 1396 | tbf_name(ul_tbf), ul_tbf->control_ts, ts_no); |
| 1397 | |
Daniel Willmann | 0d12a2f | 2014-07-10 17:44:07 +0200 | [diff] [blame] | 1398 | ul_tbf->control_ts = ts_no; |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 1399 | /* schedule uplink assignment */ |
Daniel Willmann | 0d12a2f | 2014-07-10 17:44:07 +0200 | [diff] [blame] | 1400 | ul_tbf->ul_ass_state = GPRS_RLCMAC_UL_ASS_SEND_ASS; |
Jacob Erlbeck | 51b1151 | 2015-06-11 16:54:50 +0200 | [diff] [blame] | 1401 | |
Jacob Erlbeck | c3c5804 | 2015-09-28 17:55:32 +0200 | [diff] [blame] | 1402 | /* get capabilities */ |
| 1403 | if (ul_tbf->ms()) |
| 1404 | ul_tbf->ms()->set_egprs_ms_class(egprs_ms_class); |
| 1405 | |
Jacob Erlbeck | 51b1151 | 2015-06-11 16:54:50 +0200 | [diff] [blame] | 1406 | /* get measurements */ |
| 1407 | if (ul_tbf->ms()) { |
| 1408 | get_meas(&meas, request); |
| 1409 | ul_tbf->ms()->update_l1_meas(&meas); |
| 1410 | } |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 1411 | return; |
| 1412 | } |
| 1413 | |
| 1414 | if (request->ID.u.Global_TFI.UnionType) { |
Daniel Willmann | 0d12a2f | 2014-07-10 17:44:07 +0200 | [diff] [blame] | 1415 | struct gprs_rlcmac_dl_tbf *dl_tbf; |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 1416 | int8_t tfi = request->ID.u.Global_TFI.u.DOWNLINK_TFI; |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 1417 | dl_tbf = bts()->dl_tbf_by_tfi(tfi, trx_no(), ts_no); |
Daniel Willmann | 0d12a2f | 2014-07-10 17:44:07 +0200 | [diff] [blame] | 1418 | if (!dl_tbf) { |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 1419 | LOGP(DRLCMAC, LOGL_NOTICE, "PACKET RESSOURCE REQ unknown downlink TFI=%d\n", tfi); |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 1420 | return; |
| 1421 | } |
Daniel Willmann | 0d12a2f | 2014-07-10 17:44:07 +0200 | [diff] [blame] | 1422 | LOGP(DRLCMAC, LOGL_ERROR, |
| 1423 | "RX: [PCU <- BTS] %s FIXME: Packet resource request\n", |
| 1424 | tbf_name(dl_tbf)); |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 1425 | } else { |
Daniel Willmann | 0d12a2f | 2014-07-10 17:44:07 +0200 | [diff] [blame] | 1426 | struct gprs_rlcmac_ul_tbf *ul_tbf; |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 1427 | int8_t tfi = request->ID.u.Global_TFI.u.UPLINK_TFI; |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 1428 | ul_tbf = bts()->ul_tbf_by_tfi(tfi, trx_no(), ts_no); |
Daniel Willmann | 0d12a2f | 2014-07-10 17:44:07 +0200 | [diff] [blame] | 1429 | if (!ul_tbf) { |
Holger Hans Peter Freyther | 6b88cdd | 2013-10-27 15:44:21 +0100 | [diff] [blame] | 1430 | LOGP(DRLCMAC, LOGL_NOTICE, "PACKET RESSOURCE REQ unknown uplink TFI=%d\n", tfi); |
| 1431 | return; |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 1432 | } |
Daniel Willmann | 0d12a2f | 2014-07-10 17:44:07 +0200 | [diff] [blame] | 1433 | LOGP(DRLCMAC, LOGL_ERROR, |
| 1434 | "RX: [PCU <- BTS] %s FIXME: Packet resource request\n", |
| 1435 | tbf_name(ul_tbf)); |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 1436 | } |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 1437 | } |
| 1438 | |
Holger Hans Peter Freyther | cb5c49b | 2013-10-27 11:19:13 +0100 | [diff] [blame] | 1439 | void gprs_rlcmac_pdch::rcv_measurement_report(Packet_Measurement_Report_t *report, uint32_t fn) |
Holger Hans Peter Freyther | 750ca67 | 2013-10-27 11:16:20 +0100 | [diff] [blame] | 1440 | { |
| 1441 | struct gprs_rlcmac_sba *sba; |
| 1442 | |
| 1443 | sba = bts()->sba()->find(this, fn); |
| 1444 | if (!sba) { |
| 1445 | LOGP(DRLCMAC, LOGL_NOTICE, "MS send measurement " |
| 1446 | "in packet resource request of single " |
| 1447 | "block, but there is no resource request " |
Holger Hans Peter Freyther | 53a336f | 2013-10-27 12:47:48 +0100 | [diff] [blame] | 1448 | "scheduled! TLLI=0x%08x\n", report->TLLI); |
Holger Hans Peter Freyther | 750ca67 | 2013-10-27 11:16:20 +0100 | [diff] [blame] | 1449 | } else { |
Jacob Erlbeck | 1db67e0 | 2015-05-22 18:02:51 +0200 | [diff] [blame] | 1450 | GprsMs *ms = bts()->ms_store().get_ms(report->TLLI); |
| 1451 | if (!ms) |
| 1452 | LOGP(DRLCMAC, LOGL_NOTICE, "MS send measurement " |
| 1453 | "but TLLI 0x%08x is unknown\n", report->TLLI); |
| 1454 | else |
| 1455 | ms->set_ta(sba->ta); |
| 1456 | |
Holger Hans Peter Freyther | 750ca67 | 2013-10-27 11:16:20 +0100 | [diff] [blame] | 1457 | bts()->sba()->free_sba(sba); |
| 1458 | } |
Holger Hans Peter Freyther | cb5c49b | 2013-10-27 11:19:13 +0100 | [diff] [blame] | 1459 | gprs_rlcmac_meas_rep(report); |
Holger Hans Peter Freyther | 750ca67 | 2013-10-27 11:16:20 +0100 | [diff] [blame] | 1460 | } |
| 1461 | |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 1462 | /* Received Uplink RLC control block. */ |
| 1463 | int gprs_rlcmac_pdch::rcv_control_block( |
Harald Welte | 717cdf5 | 2017-07-21 21:56:23 +0200 | [diff] [blame] | 1464 | const uint8_t *data, uint8_t data_len, bitvec *rlc_block, uint32_t fn) |
Holger Hans Peter Freyther | 8428088 | 2013-10-27 11:11:18 +0100 | [diff] [blame] | 1465 | { |
Holger Hans Peter Freyther | fcbc702 | 2013-10-26 17:38:37 +0200 | [diff] [blame] | 1466 | RlcMacUplink_t * ul_control_block = (RlcMacUplink_t *)talloc_zero(tall_pcu_ctx, RlcMacUplink_t); |
| 1467 | LOGP(DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ RX : Uplink Control Block +++++++++++++++++++++++++\n"); |
| 1468 | decode_gsm_rlcmac_uplink(rlc_block, ul_control_block); |
| 1469 | LOGPC(DCSN1, LOGL_NOTICE, "\n"); |
| 1470 | LOGP(DRLCMAC, LOGL_DEBUG, "------------------------- RX : Uplink Control Block -------------------------\n"); |
Harald Welte | 717cdf5 | 2017-07-21 21:56:23 +0200 | [diff] [blame] | 1471 | |
| 1472 | if (ul_control_block->u.MESSAGE_TYPE == MT_PACKET_UPLINK_DUMMY_CONTROL_BLOCK) |
| 1473 | bts()->send_gsmtap(PCU_GSMTAP_C_UL_DUMMY, true, trx_no(), ts_no, GSMTAP_CHANNEL_PACCH, fn, data, data_len); |
| 1474 | else |
| 1475 | bts()->send_gsmtap(PCU_GSMTAP_C_UL_CTRL, true, trx_no(), ts_no, GSMTAP_CHANNEL_PACCH, fn, data, data_len); |
| 1476 | |
Mrinal Mishra | f86307e | 2016-11-10 18:16:30 +0530 | [diff] [blame] | 1477 | bts()->rlc_rcvd_control(); |
Holger Hans Peter Freyther | fcbc702 | 2013-10-26 17:38:37 +0200 | [diff] [blame] | 1478 | switch (ul_control_block->u.MESSAGE_TYPE) { |
| 1479 | case MT_PACKET_CONTROL_ACK: |
Holger Hans Peter Freyther | e1a075a | 2013-10-27 13:35:30 +0100 | [diff] [blame] | 1480 | rcv_control_ack(&ul_control_block->u.Packet_Control_Acknowledgement, fn); |
Holger Hans Peter Freyther | fcbc702 | 2013-10-26 17:38:37 +0200 | [diff] [blame] | 1481 | break; |
| 1482 | case MT_PACKET_DOWNLINK_ACK_NACK: |
Holger Hans Peter Freyther | 5da2014 | 2013-10-27 11:41:01 +0100 | [diff] [blame] | 1483 | rcv_control_dl_ack_nack(&ul_control_block->u.Packet_Downlink_Ack_Nack, fn); |
Holger Hans Peter Freyther | fcbc702 | 2013-10-26 17:38:37 +0200 | [diff] [blame] | 1484 | break; |
Jacob Erlbeck | ae9c575 | 2016-01-13 13:55:44 +0100 | [diff] [blame] | 1485 | case MT_EGPRS_PACKET_DOWNLINK_ACK_NACK: |
| 1486 | rcv_control_egprs_dl_ack_nack(&ul_control_block->u.Egprs_Packet_Downlink_Ack_Nack, fn); |
| 1487 | break; |
Holger Hans Peter Freyther | fcbc702 | 2013-10-26 17:38:37 +0200 | [diff] [blame] | 1488 | case MT_PACKET_RESOURCE_REQUEST: |
Holger Hans Peter Freyther | 7a34471 | 2013-10-27 11:37:53 +0100 | [diff] [blame] | 1489 | rcv_resource_request(&ul_control_block->u.Packet_Resource_Request, fn); |
Holger Hans Peter Freyther | fcbc702 | 2013-10-26 17:38:37 +0200 | [diff] [blame] | 1490 | break; |
| 1491 | case MT_PACKET_MEASUREMENT_REPORT: |
Holger Hans Peter Freyther | cb5c49b | 2013-10-27 11:19:13 +0100 | [diff] [blame] | 1492 | rcv_measurement_report(&ul_control_block->u.Packet_Measurement_Report, fn); |
Holger Hans Peter Freyther | fcbc702 | 2013-10-26 17:38:37 +0200 | [diff] [blame] | 1493 | break; |
Holger Hans Peter Freyther | c1ae226 | 2013-10-27 10:50:35 +0100 | [diff] [blame] | 1494 | case MT_PACKET_UPLINK_DUMMY_CONTROL_BLOCK: |
| 1495 | /* ignoring it. change the SI to not force sending these? */ |
| 1496 | break; |
Holger Hans Peter Freyther | fcbc702 | 2013-10-26 17:38:37 +0200 | [diff] [blame] | 1497 | default: |
Holger Hans Peter Freyther | 1587764 | 2013-10-27 09:50:15 +0100 | [diff] [blame] | 1498 | bts()->decode_error(); |
Holger Hans Peter Freyther | 180def9 | 2013-10-27 10:36:37 +0100 | [diff] [blame] | 1499 | LOGP(DRLCMAC, LOGL_NOTICE, |
| 1500 | "RX: [PCU <- BTS] unknown control block(%d) received\n", |
| 1501 | ul_control_block->u.MESSAGE_TYPE); |
Holger Hans Peter Freyther | fcbc702 | 2013-10-26 17:38:37 +0200 | [diff] [blame] | 1502 | } |
| 1503 | talloc_free(ul_control_block); |
| 1504 | return 1; |
| 1505 | } |
| 1506 | |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 1507 | |
Holger Hans Peter Freyther | 6f9f434 | 2013-10-26 16:54:10 +0200 | [diff] [blame] | 1508 | /* received RLC/MAC block from L1 */ |
Jacob Erlbeck | 20f6fd1 | 2015-06-08 11:05:45 +0200 | [diff] [blame] | 1509 | int gprs_rlcmac_pdch::rcv_block(uint8_t *data, uint8_t len, uint32_t fn, |
| 1510 | struct pcu_l1_meas *meas) |
Holger Hans Peter Freyther | 9ae367f | 2013-10-26 16:42:38 +0200 | [diff] [blame] | 1511 | { |
Jacob Erlbeck | 9e862e1 | 2015-12-14 15:19:12 +0100 | [diff] [blame] | 1512 | GprsCodingScheme cs = GprsCodingScheme::getBySizeUL(len); |
| 1513 | if (!cs) { |
| 1514 | bts()->decode_error(); |
| 1515 | LOGP(DRLCMACUL, LOGL_ERROR, "Dropping data block with invalid" |
| 1516 | "length: %d)\n", len); |
| 1517 | return -EINVAL; |
| 1518 | } |
| 1519 | |
Alexander Couzens | 7fdbf89 | 2016-05-21 19:45:23 +0200 | [diff] [blame] | 1520 | bts()->rlc_ul_bytes(len); |
| 1521 | |
Jacob Erlbeck | 9e862e1 | 2015-12-14 15:19:12 +0100 | [diff] [blame] | 1522 | LOGP(DRLCMACUL, LOGL_DEBUG, "Got RLC block, coding scheme: %s, " |
Jacob Erlbeck | fc1b3e6 | 2016-01-11 09:58:11 +0100 | [diff] [blame] | 1523 | "length: %d (%d))\n", cs.name(), len, cs.usedSizeUL()); |
Jacob Erlbeck | 9e862e1 | 2015-12-14 15:19:12 +0100 | [diff] [blame] | 1524 | |
| 1525 | if (cs.isGprs()) |
Harald Welte | 717cdf5 | 2017-07-21 21:56:23 +0200 | [diff] [blame] | 1526 | return rcv_block_gprs(data, len, fn, meas, cs); |
Jacob Erlbeck | 9e862e1 | 2015-12-14 15:19:12 +0100 | [diff] [blame] | 1527 | |
Jacob Erlbeck | 690a734 | 2015-11-30 18:09:17 +0100 | [diff] [blame] | 1528 | if (cs.isEgprs()) |
Harald Welte | 717cdf5 | 2017-07-21 21:56:23 +0200 | [diff] [blame] | 1529 | return rcv_data_block(data, len, fn, meas, cs); |
Jacob Erlbeck | 690a734 | 2015-11-30 18:09:17 +0100 | [diff] [blame] | 1530 | |
Jacob Erlbeck | 9e862e1 | 2015-12-14 15:19:12 +0100 | [diff] [blame] | 1531 | bts()->decode_error(); |
| 1532 | LOGP(DRLCMACUL, LOGL_ERROR, "Unsupported coding scheme %s\n", |
| 1533 | cs.name()); |
| 1534 | return -EINVAL; |
| 1535 | } |
| 1536 | |
Alexander Couzens | 2fcfc29 | 2016-05-24 14:40:03 +0200 | [diff] [blame] | 1537 | /*! \brief process egprs and gprs data blocks */ |
Harald Welte | 717cdf5 | 2017-07-21 21:56:23 +0200 | [diff] [blame] | 1538 | int gprs_rlcmac_pdch::rcv_data_block(uint8_t *data, uint8_t data_len, uint32_t fn, |
Jacob Erlbeck | 690a734 | 2015-11-30 18:09:17 +0100 | [diff] [blame] | 1539 | struct pcu_l1_meas *meas, GprsCodingScheme cs) |
| 1540 | { |
Jacob Erlbeck | 39c6c7f | 2015-12-08 15:14:05 +0100 | [diff] [blame] | 1541 | int rc; |
Jacob Erlbeck | f2ba4cb | 2016-01-07 18:59:28 +0100 | [diff] [blame] | 1542 | struct gprs_rlc_data_info rlc_dec; |
Jacob Erlbeck | 39c6c7f | 2015-12-08 15:14:05 +0100 | [diff] [blame] | 1543 | struct gprs_rlcmac_ul_tbf *tbf; |
Jacob Erlbeck | fc1b3e6 | 2016-01-11 09:58:11 +0100 | [diff] [blame] | 1544 | unsigned len = cs.sizeUL(); |
Jacob Erlbeck | 39c6c7f | 2015-12-08 15:14:05 +0100 | [diff] [blame] | 1545 | |
| 1546 | /* These are always data blocks, since EGPRS still uses CS-1 for |
| 1547 | * control blocks (see 44.060, section 10.3, 1st par.) |
| 1548 | */ |
Jacob Erlbeck | 554a835 | 2015-12-09 17:39:56 +0100 | [diff] [blame] | 1549 | if (cs.isEgprs()) { |
| 1550 | if (!bts()->bts_data()->egprs_enabled) { |
| 1551 | LOGP(DRLCMACUL, LOGL_ERROR, |
| 1552 | "Got %s RLC block but EGPRS is not enabled\n", |
| 1553 | cs.name()); |
| 1554 | return -EINVAL; |
| 1555 | } |
Harald Welte | f7740aa | 2017-07-29 13:29:37 +0200 | [diff] [blame] | 1556 | bts()->send_gsmtap(PCU_GSMTAP_C_UL_DATA_EGPRS, true, trx_no(), ts_no, GSMTAP_CHANNEL_PDTCH, fn, data, data_len); |
Harald Welte | 717cdf5 | 2017-07-21 21:56:23 +0200 | [diff] [blame] | 1557 | } else { |
Harald Welte | f7740aa | 2017-07-29 13:29:37 +0200 | [diff] [blame] | 1558 | bts()->send_gsmtap(PCU_GSMTAP_C_UL_DATA_GPRS, true, trx_no(), ts_no, GSMTAP_CHANNEL_PDTCH, fn, data, data_len); |
Jacob Erlbeck | 690a734 | 2015-11-30 18:09:17 +0100 | [diff] [blame] | 1559 | } |
| 1560 | |
Jacob Erlbeck | d88bb2e | 2015-12-11 14:53:29 +0100 | [diff] [blame] | 1561 | LOGP(DRLCMACUL, LOGL_DEBUG, " UL data: %s\n", osmo_hexdump(data, len)); |
| 1562 | |
Jacob Erlbeck | 39c6c7f | 2015-12-08 15:14:05 +0100 | [diff] [blame] | 1563 | rc = Decoding::rlc_parse_ul_data_header(&rlc_dec, data, cs); |
| 1564 | if (rc < 0) { |
| 1565 | LOGP(DRLCMACUL, LOGL_ERROR, |
| 1566 | "Got %s RLC block but header parsing has failed\n", |
| 1567 | cs.name()); |
| 1568 | bts()->decode_error(); |
| 1569 | return rc; |
| 1570 | } |
| 1571 | |
| 1572 | LOGP(DRLCMACUL, LOGL_INFO, |
| 1573 | "Got %s RLC block: " |
| 1574 | "R=%d, SI=%d, TFI=%d, CPS=%d, RSB=%d, " |
| 1575 | "rc=%d\n", |
| 1576 | cs.name(), |
| 1577 | rlc_dec.r, rlc_dec.si, rlc_dec.tfi, rlc_dec.cps, rlc_dec.rsb, |
| 1578 | rc); |
| 1579 | |
| 1580 | /* find TBF inst from given TFI */ |
| 1581 | tbf = ul_tbf_by_tfi(rlc_dec.tfi); |
| 1582 | if (!tbf) { |
| 1583 | LOGP(DRLCMACUL, LOGL_NOTICE, "UL DATA unknown TFI=%d\n", |
| 1584 | rlc_dec.tfi); |
| 1585 | return 0; |
| 1586 | } |
| 1587 | |
Jacob Erlbeck | fc1b3e6 | 2016-01-11 09:58:11 +0100 | [diff] [blame] | 1588 | return tbf->rcv_data_block_acknowledged(&rlc_dec, data, meas); |
Jacob Erlbeck | 690a734 | 2015-11-30 18:09:17 +0100 | [diff] [blame] | 1589 | } |
| 1590 | |
Harald Welte | 717cdf5 | 2017-07-21 21:56:23 +0200 | [diff] [blame] | 1591 | int gprs_rlcmac_pdch::rcv_block_gprs(uint8_t *data, uint8_t data_len, uint32_t fn, |
Jacob Erlbeck | 9e862e1 | 2015-12-14 15:19:12 +0100 | [diff] [blame] | 1592 | struct pcu_l1_meas *meas, GprsCodingScheme cs) |
| 1593 | { |
Holger Hans Peter Freyther | 6f9f434 | 2013-10-26 16:54:10 +0200 | [diff] [blame] | 1594 | unsigned payload = data[0] >> 6; |
Holger Hans Peter Freyther | 6f9f434 | 2013-10-26 16:54:10 +0200 | [diff] [blame] | 1595 | bitvec *block; |
| 1596 | int rc = 0; |
Jacob Erlbeck | 9e862e1 | 2015-12-14 15:19:12 +0100 | [diff] [blame] | 1597 | unsigned len = cs.maxBytesUL(); |
Holger Hans Peter Freyther | 6f9f434 | 2013-10-26 16:54:10 +0200 | [diff] [blame] | 1598 | |
| 1599 | switch (payload) { |
| 1600 | case GPRS_RLCMAC_DATA_BLOCK: |
Harald Welte | 717cdf5 | 2017-07-21 21:56:23 +0200 | [diff] [blame] | 1601 | rc = rcv_data_block(data, data_len, fn, meas, cs); |
Holger Hans Peter Freyther | 6f9f434 | 2013-10-26 16:54:10 +0200 | [diff] [blame] | 1602 | break; |
| 1603 | case GPRS_RLCMAC_CONTROL_BLOCK: |
Alexander Couzens | ccde5c9 | 2017-02-04 03:10:08 +0100 | [diff] [blame] | 1604 | block = bitvec_alloc(len, tall_pcu_ctx); |
Holger Hans Peter Freyther | 6f9f434 | 2013-10-26 16:54:10 +0200 | [diff] [blame] | 1605 | if (!block) |
| 1606 | return -ENOMEM; |
| 1607 | bitvec_unpack(block, data); |
Harald Welte | 717cdf5 | 2017-07-21 21:56:23 +0200 | [diff] [blame] | 1608 | rc = rcv_control_block(data, data_len, block, fn); |
Holger Hans Peter Freyther | 6f9f434 | 2013-10-26 16:54:10 +0200 | [diff] [blame] | 1609 | bitvec_free(block); |
| 1610 | break; |
| 1611 | case GPRS_RLCMAC_CONTROL_BLOCK_OPT: |
| 1612 | LOGP(DRLCMAC, LOGL_NOTICE, "GPRS_RLCMAC_CONTROL_BLOCK_OPT block payload is not supported.\n"); |
| 1613 | break; |
| 1614 | default: |
| 1615 | LOGP(DRLCMAC, LOGL_NOTICE, "Unknown RLCMAC block payload(%u).\n", payload); |
| 1616 | rc = -EINVAL; |
| 1617 | } |
| 1618 | |
| 1619 | return rc; |
Holger Hans Peter Freyther | 9ae367f | 2013-10-26 16:42:38 +0200 | [diff] [blame] | 1620 | } |
Daniel Willmann | 1e0c610 | 2014-06-04 14:56:09 +0200 | [diff] [blame] | 1621 | |
Minh-Quang Nguyen | 1bcfa9a | 2017-11-01 14:41:37 -0400 | [diff] [blame] | 1622 | /* update TA based on TA provided by PH-DATA-IND */ |
| 1623 | void update_tbf_ta(struct gprs_rlcmac_ul_tbf *tbf, int8_t ta_delta) |
| 1624 | { |
| 1625 | int16_t ta_adj; |
| 1626 | uint8_t ta_target; |
| 1627 | |
| 1628 | if (ta_delta) { |
| 1629 | /* adjust TA based on TA provided by PH-DATA-IND */ |
| 1630 | ta_adj = tbf->ta() + ta_delta; |
| 1631 | |
| 1632 | /* limit target TA in range 0..63 bits */ |
| 1633 | ta_target = ta_limit(ta_adj); |
| 1634 | |
| 1635 | LOGP(DL1IF, LOGL_INFO, "PH-DATA-IND is updating TLLI=0x%08x: TA %u -> %u on " |
| 1636 | "TRX = %d, TS = %d, FN = %d\n", |
| 1637 | tbf->tlli(), tbf->ta(), ta_target, |
| 1638 | tbf->trx->trx_no , tbf->poll_ts, tbf->poll_fn); |
| 1639 | tbf->set_ta(ta_target); |
| 1640 | } |
| 1641 | } |
| 1642 | |
| 1643 | /* set TA based on TA provided by PH-RA-IND */ |
| 1644 | void set_tbf_ta(struct gprs_rlcmac_ul_tbf *tbf, uint8_t ta) |
| 1645 | { |
| 1646 | uint8_t ta_target; |
| 1647 | |
| 1648 | if (tbf->ta() != ta) { |
| 1649 | /* limit target TA in range 0..63 bits */ |
| 1650 | ta_target = ta_limit(ta); |
| 1651 | |
| 1652 | LOGP(DL1IF, LOGL_INFO, "PH-RA-IND is updating TLLI=0x%08x: TA %u -> %u on " |
| 1653 | "TRX = %d, TS = %d, FN = %d\n", |
| 1654 | tbf->tlli(), tbf->ta(), ta_target, |
| 1655 | tbf->trx->trx_no , tbf->poll_ts, tbf->poll_fn); |
| 1656 | tbf->set_ta(ta_target); |
| 1657 | } |
| 1658 | } |
| 1659 | |
| 1660 | void bts_update_tbf_ta(const char *p, uint32_t fn, uint8_t trx_no, uint8_t ts, int8_t ta, bool is_rach) |
Max | d71e8b3 | 2016-09-19 16:17:06 +0200 | [diff] [blame] | 1661 | { |
| 1662 | struct gprs_rlcmac_ul_tbf *tbf = |
| 1663 | bts_main_data()->bts->ul_tbf_by_poll_fn(fn, trx_no, ts); |
| 1664 | if (!tbf) |
| 1665 | LOGP(DL1IF, LOGL_DEBUG, "[%s] update TA = %u ignored due to " |
| 1666 | "unknown UL TBF on TRX = %d, TS = %d, FN = %d\n", |
| 1667 | p, ta, trx_no, ts, fn); |
Minh-Quang Nguyen | 1bcfa9a | 2017-11-01 14:41:37 -0400 | [diff] [blame] | 1668 | else { |
| 1669 | /* we need to distinguish TA information provided by L1 |
| 1670 | * from PH-DATA-IND and PHY-RA-IND so that we can properly |
| 1671 | * update TA for given TBF |
| 1672 | */ |
| 1673 | if (is_rach) |
| 1674 | set_tbf_ta(tbf, (uint8_t)ta); |
| 1675 | else |
| 1676 | update_tbf_ta(tbf, ta); |
| 1677 | |
Max | d71e8b3 | 2016-09-19 16:17:06 +0200 | [diff] [blame] | 1678 | } |
| 1679 | } |
| 1680 | |
Jacob Erlbeck | ed2dbf6 | 2015-12-28 19:15:40 +0100 | [diff] [blame] | 1681 | gprs_rlcmac_tbf *gprs_rlcmac_pdch::tbf_from_list_by_tfi( |
| 1682 | LListHead<gprs_rlcmac_tbf> *tbf_list, uint8_t tfi, |
Daniel Willmann | 2207c5e | 2014-07-10 17:44:06 +0200 | [diff] [blame] | 1683 | enum gprs_rlcmac_tbf_direction dir) |
Daniel Willmann | 1e0c610 | 2014-06-04 14:56:09 +0200 | [diff] [blame] | 1684 | { |
Daniel Willmann | 17a1d5e | 2014-05-30 20:21:30 +0200 | [diff] [blame] | 1685 | gprs_rlcmac_tbf *tbf; |
Jacob Erlbeck | ed2dbf6 | 2015-12-28 19:15:40 +0100 | [diff] [blame] | 1686 | LListHead<gprs_rlcmac_tbf> *pos; |
Daniel Willmann | 17a1d5e | 2014-05-30 20:21:30 +0200 | [diff] [blame] | 1687 | |
Jacob Erlbeck | ed2dbf6 | 2015-12-28 19:15:40 +0100 | [diff] [blame] | 1688 | llist_for_each(pos, tbf_list) { |
| 1689 | tbf = pos->entry(); |
Daniel Willmann | 17a1d5e | 2014-05-30 20:21:30 +0200 | [diff] [blame] | 1690 | if (tbf->tfi() != tfi) |
| 1691 | continue; |
| 1692 | if (!tbf->pdch[ts_no]) |
| 1693 | continue; |
| 1694 | return tbf; |
| 1695 | } |
| 1696 | return NULL; |
Daniel Willmann | 1e0c610 | 2014-06-04 14:56:09 +0200 | [diff] [blame] | 1697 | } |
| 1698 | |
Daniel Willmann | fe6e2e4 | 2014-07-10 17:44:06 +0200 | [diff] [blame] | 1699 | gprs_rlcmac_ul_tbf *gprs_rlcmac_pdch::ul_tbf_by_tfi(uint8_t tfi) |
Daniel Willmann | 1e0c610 | 2014-06-04 14:56:09 +0200 | [diff] [blame] | 1700 | { |
Jacob Erlbeck | aa9daa1 | 2015-12-28 18:49:12 +0100 | [diff] [blame] | 1701 | return as_ul_tbf(tbf_by_tfi(tfi, GPRS_RLCMAC_UL_TBF)); |
Daniel Willmann | 17a1d5e | 2014-05-30 20:21:30 +0200 | [diff] [blame] | 1702 | } |
| 1703 | |
Daniel Willmann | fe6e2e4 | 2014-07-10 17:44:06 +0200 | [diff] [blame] | 1704 | gprs_rlcmac_dl_tbf *gprs_rlcmac_pdch::dl_tbf_by_tfi(uint8_t tfi) |
Daniel Willmann | 17a1d5e | 2014-05-30 20:21:30 +0200 | [diff] [blame] | 1705 | { |
Jacob Erlbeck | aa9daa1 | 2015-12-28 18:49:12 +0100 | [diff] [blame] | 1706 | return as_dl_tbf(tbf_by_tfi(tfi, GPRS_RLCMAC_DL_TBF)); |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 1707 | } |
| 1708 | |
| 1709 | /* lookup TBF Entity (by TFI) */ |
| 1710 | gprs_rlcmac_tbf *gprs_rlcmac_pdch::tbf_by_tfi(uint8_t tfi, |
| 1711 | enum gprs_rlcmac_tbf_direction dir) |
| 1712 | { |
| 1713 | struct gprs_rlcmac_tbf *tbf; |
| 1714 | |
| 1715 | if (tfi >= 32) |
| 1716 | return NULL; |
| 1717 | |
| 1718 | tbf = m_tbfs[dir][tfi]; |
| 1719 | |
| 1720 | if (!tbf) |
| 1721 | return NULL; |
| 1722 | |
| 1723 | if (tbf->state_is_not(GPRS_RLCMAC_RELEASING)) { |
| 1724 | return tbf; |
| 1725 | } |
| 1726 | |
| 1727 | return NULL; |
Daniel Willmann | 1e0c610 | 2014-06-04 14:56:09 +0200 | [diff] [blame] | 1728 | } |
Jacob Erlbeck | ccc34e4 | 2015-06-29 13:45:05 +0200 | [diff] [blame] | 1729 | |
| 1730 | void gprs_rlcmac_pdch::attach_tbf(gprs_rlcmac_tbf *tbf) |
| 1731 | { |
Jacob Erlbeck | cc9358f | 2015-06-30 14:10:13 +0200 | [diff] [blame] | 1732 | gprs_rlcmac_ul_tbf *ul_tbf; |
| 1733 | |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 1734 | if (m_tbfs[tbf->direction][tbf->tfi()]) |
| 1735 | LOGP(DRLCMAC, LOGL_ERROR, "PDCH(TS %d, TRX %d): " |
| 1736 | "%s has not been detached, overwriting it\n", |
| 1737 | ts_no, trx_no(), |
| 1738 | m_tbfs[tbf->direction][tbf->tfi()]->name()); |
| 1739 | |
Jacob Erlbeck | ccc34e4 | 2015-06-29 13:45:05 +0200 | [diff] [blame] | 1740 | m_num_tbfs[tbf->direction] += 1; |
Jacob Erlbeck | cc9358f | 2015-06-30 14:10:13 +0200 | [diff] [blame] | 1741 | if (tbf->direction == GPRS_RLCMAC_UL_TBF) { |
Jacob Erlbeck | aa9daa1 | 2015-12-28 18:49:12 +0100 | [diff] [blame] | 1742 | ul_tbf = as_ul_tbf(tbf); |
Jacob Erlbeck | cc9358f | 2015-06-30 14:10:13 +0200 | [diff] [blame] | 1743 | m_assigned_usf |= 1 << ul_tbf->m_usf[ts_no]; |
| 1744 | } |
Jacob Erlbeck | 47a57f6 | 2015-07-08 12:53:16 +0200 | [diff] [blame] | 1745 | m_assigned_tfi[tbf->direction] |= 1UL << tbf->tfi(); |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 1746 | m_tbfs[tbf->direction][tbf->tfi()] = tbf; |
Jacob Erlbeck | cc9358f | 2015-06-30 14:10:13 +0200 | [diff] [blame] | 1747 | |
| 1748 | LOGP(DRLCMAC, LOGL_INFO, "PDCH(TS %d, TRX %d): Attaching %s, %d TBFs, " |
| 1749 | "USFs = %02x, TFIs = %08x.\n", |
| 1750 | ts_no, trx_no(), tbf->name(), m_num_tbfs[tbf->direction], |
Jacob Erlbeck | 47a57f6 | 2015-07-08 12:53:16 +0200 | [diff] [blame] | 1751 | m_assigned_usf, m_assigned_tfi[tbf->direction]); |
Jacob Erlbeck | ccc34e4 | 2015-06-29 13:45:05 +0200 | [diff] [blame] | 1752 | } |
| 1753 | |
| 1754 | void gprs_rlcmac_pdch::detach_tbf(gprs_rlcmac_tbf *tbf) |
| 1755 | { |
Jacob Erlbeck | cc9358f | 2015-06-30 14:10:13 +0200 | [diff] [blame] | 1756 | gprs_rlcmac_ul_tbf *ul_tbf; |
| 1757 | |
Jacob Erlbeck | ccc34e4 | 2015-06-29 13:45:05 +0200 | [diff] [blame] | 1758 | OSMO_ASSERT(m_num_tbfs[tbf->direction] > 0); |
| 1759 | |
| 1760 | m_num_tbfs[tbf->direction] -= 1; |
Jacob Erlbeck | cc9358f | 2015-06-30 14:10:13 +0200 | [diff] [blame] | 1761 | if (tbf->direction == GPRS_RLCMAC_UL_TBF) { |
Jacob Erlbeck | aa9daa1 | 2015-12-28 18:49:12 +0100 | [diff] [blame] | 1762 | ul_tbf = as_ul_tbf(tbf); |
Jacob Erlbeck | cc9358f | 2015-06-30 14:10:13 +0200 | [diff] [blame] | 1763 | m_assigned_usf &= ~(1 << ul_tbf->m_usf[ts_no]); |
| 1764 | } |
Jacob Erlbeck | 47a57f6 | 2015-07-08 12:53:16 +0200 | [diff] [blame] | 1765 | m_assigned_tfi[tbf->direction] &= ~(1UL << tbf->tfi()); |
Jacob Erlbeck | 3a10dbd | 2015-07-10 19:52:37 +0200 | [diff] [blame] | 1766 | m_tbfs[tbf->direction][tbf->tfi()] = NULL; |
Jacob Erlbeck | cc9358f | 2015-06-30 14:10:13 +0200 | [diff] [blame] | 1767 | |
| 1768 | LOGP(DRLCMAC, LOGL_INFO, "PDCH(TS %d, TRX %d): Detaching %s, %d TBFs, " |
| 1769 | "USFs = %02x, TFIs = %08x.\n", |
| 1770 | ts_no, trx_no(), tbf->name(), m_num_tbfs[tbf->direction], |
Jacob Erlbeck | 47a57f6 | 2015-07-08 12:53:16 +0200 | [diff] [blame] | 1771 | m_assigned_usf, m_assigned_tfi[tbf->direction]); |
Jacob Erlbeck | ccc34e4 | 2015-06-29 13:45:05 +0200 | [diff] [blame] | 1772 | } |
Jacob Erlbeck | 23f93a1 | 2015-06-30 08:52:54 +0200 | [diff] [blame] | 1773 | |
| 1774 | void gprs_rlcmac_pdch::reserve(enum gprs_rlcmac_tbf_direction dir) |
| 1775 | { |
| 1776 | m_num_reserved[dir] += 1; |
| 1777 | } |
| 1778 | |
| 1779 | void gprs_rlcmac_pdch::unreserve(enum gprs_rlcmac_tbf_direction dir) |
| 1780 | { |
| 1781 | OSMO_ASSERT(m_num_reserved[dir] > 0); |
| 1782 | m_num_reserved[dir] -= 1; |
| 1783 | } |
| 1784 | |
| 1785 | void gprs_rlcmac_trx::reserve_slots(enum gprs_rlcmac_tbf_direction dir, |
| 1786 | uint8_t slots) |
| 1787 | { |
| 1788 | unsigned i; |
| 1789 | for (i = 0; i < ARRAY_SIZE(pdch); i += 1) |
| 1790 | if (slots & (1 << i)) |
| 1791 | pdch[i].reserve(dir); |
| 1792 | } |
| 1793 | |
| 1794 | void gprs_rlcmac_trx::unreserve_slots(enum gprs_rlcmac_tbf_direction dir, |
| 1795 | uint8_t slots) |
| 1796 | { |
| 1797 | unsigned i; |
| 1798 | for (i = 0; i < ARRAY_SIZE(pdch); i += 1) |
| 1799 | if (slots & (1 << i)) |
| 1800 | pdch[i].unreserve(dir); |
| 1801 | } |