Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 1 | /* Data block transfer |
| 2 | * |
| 3 | * Copyright (C) 2012 Ivan Klyuchnikov |
| 4 | * Copyright (C) 2012 Andreas Eversberg <jolly@eversberg.eu> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version 2 |
| 9 | * of the License, or (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 General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 19 | */ |
| 20 | |
| 21 | #include <gprs_bssgp_pcu.h> |
| 22 | #include <gprs_rlcmac.h> |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 23 | #include <pcu_l1_if.h> |
Holger Hans Peter Freyther | 67ed34e | 2013-10-17 17:01:54 +0200 | [diff] [blame] | 24 | #include <bts.h> |
Holger Hans Peter Freyther | 63f29d6 | 2013-10-19 19:04:03 +0200 | [diff] [blame] | 25 | #include <encoding.h> |
Holger Hans Peter Freyther | 8692128 | 2013-08-24 21:26:42 +0200 | [diff] [blame] | 26 | #include <tbf.h> |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 27 | #include <rlc.h> |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 28 | |
Holger Hans Peter Freyther | 7ce21eb | 2013-10-20 08:28:25 +0200 | [diff] [blame] | 29 | static struct gprs_rlcmac_cs gprs_rlcmac_cs[] = { |
| 30 | /* frame length data block max payload */ |
| 31 | { 0, 0, 0 }, |
| 32 | { 23, 23, 20 }, /* CS-1 */ |
| 33 | { 34, 33, 30 }, /* CS-2 */ |
| 34 | { 40, 39, 36 }, /* CS-3 */ |
| 35 | { 54, 53, 50 }, /* CS-4 */ |
| 36 | }; |
| 37 | |
| 38 | |
Andreas Eversberg | 6681bb8 | 2012-07-25 08:48:44 +0200 | [diff] [blame] | 39 | extern void *tall_pcu_ctx; |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 40 | |
Andreas Eversberg | f54a89e | 2012-07-16 11:56:11 +0200 | [diff] [blame] | 41 | /* After sending these frames, we poll for ack/nack. */ |
Andreas Eversberg | 5f14bd9 | 2012-10-03 14:20:26 +0200 | [diff] [blame] | 42 | #define POLL_ACK_AFTER_FRAMES 20 |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 43 | |
Andreas Eversberg | 802bb6e | 2012-08-06 11:15:05 +0200 | [diff] [blame] | 44 | /* If acknowledgement to uplink/downlink assignmentshould be polled */ |
| 45 | #define POLLING_ASSIGNMENT_DL 1 |
| 46 | #define POLLING_ASSIGNMENT_UL 1 |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 47 | |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 48 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 49 | /* |
| 50 | * UL data block flow |
| 51 | */ |
| 52 | |
Holger Hans Peter Freyther | b65e08a | 2013-10-20 17:10:25 +0200 | [diff] [blame] | 53 | struct msgb *gprs_rlcmac_send_uplink_ack( |
Holger Hans Peter Freyther | ae947fc | 2013-10-17 13:29:03 +0200 | [diff] [blame] | 54 | struct gprs_rlcmac_tbf *tbf, |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 55 | uint32_t fn) |
| 56 | { |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 57 | int final = (tbf->state_is(GPRS_RLCMAC_FINISHED)); |
Holger Hans Peter Freyther | b65e08a | 2013-10-20 17:10:25 +0200 | [diff] [blame] | 58 | gprs_rlcmac_bts *bts = tbf->bts->bts_data(); |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 59 | struct msgb *msg; |
| 60 | |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 61 | if (final) { |
| 62 | if (tbf->poll_state != GPRS_RLCMAC_POLL_NONE) { |
| 63 | LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already " |
| 64 | "sheduled for TBF=%d, so we must wait for " |
| 65 | "final uplink ack...\n", tbf->tfi); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 66 | return NULL; |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 67 | } |
Holger Hans Peter Freyther | b65e08a | 2013-10-20 17:10:25 +0200 | [diff] [blame] | 68 | if (tbf->bts->sba()->find(tbf->trx_no, tbf->control_ts, (fn + 13) % 2715648)) { |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 69 | LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already " |
| 70 | "scheduled for single block allocation...\n"); |
| 71 | return NULL; |
| 72 | } |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 73 | } |
| 74 | |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 75 | msg = msgb_alloc(23, "rlcmac_ul_ack"); |
| 76 | if (!msg) |
| 77 | return NULL; |
| 78 | bitvec *ack_vec = bitvec_alloc(23); |
| 79 | if (!ack_vec) { |
| 80 | msgb_free(msg); |
| 81 | return NULL; |
| 82 | } |
| 83 | bitvec_unhex(ack_vec, |
| 84 | "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
Andreas Eversberg | 6681bb8 | 2012-07-25 08:48:44 +0200 | [diff] [blame] | 85 | RlcMacDownlink_t * mac_control_block = (RlcMacDownlink_t *)talloc_zero(tall_pcu_ctx, RlcMacDownlink_t); |
Holger Hans Peter Freyther | 63f29d6 | 2013-10-19 19:04:03 +0200 | [diff] [blame] | 86 | Encoding::write_packet_uplink_ack(bts, mac_control_block, tbf, final); |
Ivan Kluchnikov | ef7f28c | 2012-07-12 14:49:15 +0400 | [diff] [blame] | 87 | encode_gsm_rlcmac_downlink(ack_vec, mac_control_block); |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 88 | bitvec_pack(ack_vec, msgb_put(msg, 23)); |
| 89 | bitvec_free(ack_vec); |
Andreas Eversberg | 6681bb8 | 2012-07-25 08:48:44 +0200 | [diff] [blame] | 90 | talloc_free(mac_control_block); |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 91 | |
Andreas Eversberg | ee31b78 | 2012-07-15 16:27:01 +0200 | [diff] [blame] | 92 | /* now we must set this flag, so we are allowed to assign downlink |
| 93 | * TBF on PACCH. it is only allowed when TLLI is aknowledged. */ |
Andreas Eversberg | 08e93cd | 2012-07-26 08:13:06 +0200 | [diff] [blame] | 94 | tbf->dir.ul.contention_resolution_done = 1; |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 95 | |
| 96 | if (final) { |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 97 | tbf->poll_state = GPRS_RLCMAC_POLL_SCHED; |
| 98 | tbf->poll_fn = (fn + 13) % 2715648; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 99 | /* waiting for final acknowledge */ |
| 100 | tbf->ul_ack_state = GPRS_RLCMAC_UL_ACK_WAIT_ACK; |
Andreas Eversberg | 08e93cd | 2012-07-26 08:13:06 +0200 | [diff] [blame] | 101 | tbf->dir.ul.final_ack_sent = 1; |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 102 | } else |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 103 | tbf->ul_ack_state = GPRS_RLCMAC_UL_ACK_NONE; |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 104 | debug_diagram(bts->bts, tbf->diag, "send UL-ACK"); |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 105 | |
| 106 | return msg; |
| 107 | } |
| 108 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 109 | struct msgb *gprs_rlcmac_send_packet_uplink_assignment( |
| 110 | struct gprs_rlcmac_tbf *tbf, uint32_t fn) |
| 111 | { |
| 112 | struct msgb *msg; |
| 113 | struct gprs_rlcmac_tbf *new_tbf; |
Holger Hans Peter Freyther | b65e08a | 2013-10-20 17:10:25 +0200 | [diff] [blame] | 114 | gprs_rlcmac_bts *bts = tbf->bts->bts_data(); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 115 | |
Andreas Eversberg | 802bb6e | 2012-08-06 11:15:05 +0200 | [diff] [blame] | 116 | #if POLLING_ASSIGNMENT_UL == 1 |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 117 | if (tbf->poll_state != GPRS_RLCMAC_POLL_NONE) { |
| 118 | LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already " |
| 119 | "sheduled for TBF=%d, so we must wait for uplink " |
| 120 | "assignment...\n", tbf->tfi); |
| 121 | return NULL; |
| 122 | } |
Holger Hans Peter Freyther | b65e08a | 2013-10-20 17:10:25 +0200 | [diff] [blame] | 123 | if (tbf->bts->sba()->find(tbf->trx_no, tbf->control_ts, (fn + 13) % 2715648)) { |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 124 | LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already scheduled for " |
| 125 | "single block allocation...\n"); |
| 126 | return NULL; |
| 127 | } |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 128 | #endif |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 129 | |
| 130 | /* on down TBF we get the uplink TBF to be assigned. */ |
| 131 | if (tbf->direction == GPRS_RLCMAC_DL_TBF) |
Holger Hans Peter Freyther | b65e08a | 2013-10-20 17:10:25 +0200 | [diff] [blame] | 132 | new_tbf = tbf->bts->tbf_by_tlli(tbf->tlli, GPRS_RLCMAC_UL_TBF); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 133 | else |
| 134 | new_tbf = tbf; |
| 135 | |
| 136 | if (!new_tbf) { |
| 137 | LOGP(DRLCMACUL, LOGL_ERROR, "We have a schedule for uplink " |
| 138 | "assignment at downlink TBF=%d, but there is no uplink " |
| 139 | "TBF\n", tbf->tfi); |
| 140 | tbf->ul_ass_state = GPRS_RLCMAC_UL_ASS_NONE; |
| 141 | return NULL; |
| 142 | } |
| 143 | |
| 144 | msg = msgb_alloc(23, "rlcmac_ul_ass"); |
| 145 | if (!msg) |
| 146 | return NULL; |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 147 | LOGP(DRLCMAC, LOGL_INFO, "TBF: START TFI: %u TLLI: 0x%08x Packet Uplink Assignment (PACCH)\n", new_tbf->tfi, new_tbf->tlli); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 148 | bitvec *ass_vec = bitvec_alloc(23); |
| 149 | if (!ass_vec) { |
| 150 | msgb_free(msg); |
| 151 | return NULL; |
| 152 | } |
| 153 | bitvec_unhex(ass_vec, |
| 154 | "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
Holger Hans Peter Freyther | 63f29d6 | 2013-10-19 19:04:03 +0200 | [diff] [blame] | 155 | Encoding::write_packet_uplink_assignment(bts, ass_vec, tbf->tfi, |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 156 | (tbf->direction == GPRS_RLCMAC_DL_TBF), tbf->tlli, |
Andreas Eversberg | aafcbbb | 2012-09-27 09:20:45 +0200 | [diff] [blame] | 157 | tbf->tlli_valid, new_tbf, POLLING_ASSIGNMENT_UL, bts->alpha, |
Andreas Eversberg | afdd9e1 | 2012-10-07 17:08:55 +0200 | [diff] [blame] | 158 | bts->gamma, -1); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 159 | bitvec_pack(ass_vec, msgb_put(msg, 23)); |
Andreas Eversberg | 6681bb8 | 2012-07-25 08:48:44 +0200 | [diff] [blame] | 160 | RlcMacDownlink_t * mac_control_block = (RlcMacDownlink_t *)talloc_zero(tall_pcu_ctx, RlcMacDownlink_t); |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 161 | LOGP(DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ TX : Packet Uplink Assignment +++++++++++++++++++++++++\n"); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 162 | decode_gsm_rlcmac_downlink(ass_vec, mac_control_block); |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 163 | LOGPC(DCSN1, LOGL_NOTICE, "\n"); |
| 164 | LOGP(DRLCMAC, LOGL_DEBUG, "------------------------- TX : Packet Uplink Assignment -------------------------\n"); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 165 | bitvec_free(ass_vec); |
Andreas Eversberg | 6681bb8 | 2012-07-25 08:48:44 +0200 | [diff] [blame] | 166 | talloc_free(mac_control_block); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 167 | |
Andreas Eversberg | 802bb6e | 2012-08-06 11:15:05 +0200 | [diff] [blame] | 168 | #if POLLING_ASSIGNMENT_UL == 1 |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 169 | tbf->poll_state = GPRS_RLCMAC_POLL_SCHED; |
| 170 | tbf->poll_fn = (fn + 13) % 2715648; |
| 171 | tbf->ul_ass_state = GPRS_RLCMAC_UL_ASS_WAIT_ACK; |
| 172 | #else |
| 173 | tbf->ul_ass_state = GPRS_RLCMAC_UL_ASS_NONE; |
Andreas Eversberg | 642c7d3 | 2012-07-23 17:58:55 +0200 | [diff] [blame] | 174 | tbf_new_state(new_tbf, GPRS_RLCMAC_FLOW); |
| 175 | tbf_assign_control_ts(new_tbf); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 176 | #endif |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 177 | debug_diagram(bts->bts, tbf->diag, "send UL-ASS"); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 178 | |
| 179 | return msg; |
| 180 | } |
| 181 | |
Holger Hans Peter Freyther | b0250eb | 2013-10-17 13:46:19 +0200 | [diff] [blame] | 182 | int gprs_rlcmac_rcv_rach(struct gprs_rlcmac_bts *bts, |
| 183 | uint8_t ra, uint32_t Fn, int16_t qta) |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 184 | { |
| 185 | struct gprs_rlcmac_tbf *tbf; |
Andreas Eversberg | 02d7cd2 | 2013-01-15 08:59:34 +0100 | [diff] [blame] | 186 | uint8_t trx, ts = 0; |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 187 | int8_t tfi; /* must be signed */ |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 188 | uint8_t sb = 0; |
| 189 | uint32_t sb_fn = 0; |
| 190 | int rc; |
| 191 | uint8_t plen; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 192 | |
| 193 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF on RACH, so we provide " |
| 194 | "one:\n"); |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 195 | if ((ra & 0xf8) == 0x70) { |
| 196 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests single block " |
| 197 | "allocation\n"); |
| 198 | sb = 1; |
| 199 | } else if (bts->force_two_phase) { |
| 200 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests single phase access, " |
| 201 | "but we force two phase access\n"); |
| 202 | sb = 1; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 203 | } |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 204 | if (qta < 0) |
| 205 | qta = 0; |
| 206 | if (qta > 252) |
| 207 | qta = 252; |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 208 | if (sb) { |
Holger Hans Peter Freyther | cedf890 | 2013-10-19 20:47:12 +0200 | [diff] [blame] | 209 | rc = bts->bts->sba()->alloc(&trx, &ts, &sb_fn, qta >> 2); |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 210 | if (rc < 0) |
| 211 | return rc; |
| 212 | LOGP(DRLCMAC, LOGL_DEBUG, "RX: [PCU <- BTS] RACH qbit-ta=%d " |
| 213 | "ra=0x%02x, Fn=%d (%d,%d,%d)\n", qta, ra, Fn, |
| 214 | (Fn / (26 * 51)) % 32, Fn % 51, Fn % 26); |
| 215 | LOGP(DRLCMAC, LOGL_INFO, "TX: Immediate Assignment Uplink " |
| 216 | "(AGCH)\n"); |
| 217 | } else { |
| 218 | // Create new TBF |
Holger Hans Peter Freyther | bcafdf8 | 2013-08-24 21:13:31 +0200 | [diff] [blame] | 219 | #warning "Copy and pate with other routines.." |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 220 | tfi = bts->bts->tfi_find_free(GPRS_RLCMAC_UL_TBF, &trx, -1); |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 221 | if (tfi < 0) { |
| 222 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH ressource\n"); |
| 223 | /* FIXME: send reject */ |
| 224 | return -EBUSY; |
| 225 | } |
| 226 | /* set class to 0, since we don't know the multislot class yet */ |
Holger Hans Peter Freyther | b67a8a3 | 2013-07-28 18:55:14 +0200 | [diff] [blame] | 227 | tbf = tbf_alloc(bts, NULL, GPRS_RLCMAC_UL_TBF, tfi, trx, 0, 1); |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 228 | if (!tbf) { |
| 229 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH ressource\n"); |
| 230 | /* FIXME: send reject */ |
| 231 | return -EBUSY; |
| 232 | } |
| 233 | tbf->ta = qta >> 2; |
| 234 | tbf_new_state(tbf, GPRS_RLCMAC_FLOW); |
| 235 | tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_CCCH); |
| 236 | tbf_timer_start(tbf, 3169, bts->t3169, 0); |
| 237 | LOGP(DRLCMAC, LOGL_DEBUG, "TBF: [UPLINK] START TFI: %u\n", |
| 238 | tbf->tfi); |
| 239 | LOGP(DRLCMAC, LOGL_DEBUG, "RX: [PCU <- BTS] TFI: %u RACH " |
| 240 | "qbit-ta=%d ra=0x%02x, Fn=%d (%d,%d,%d)\n", tbf->tfi, |
| 241 | qta, ra, Fn, (Fn / (26 * 51)) % 32, Fn % 51, Fn % 26); |
| 242 | LOGP(DRLCMAC, LOGL_INFO, "TX: START TFI: %u Immediate " |
| 243 | "Assignment Uplink (AGCH)\n", tbf->tfi); |
| 244 | } |
Andreas Eversberg | 7b04501 | 2012-07-05 07:38:49 +0200 | [diff] [blame] | 245 | bitvec *immediate_assignment = bitvec_alloc(22) /* without plen */; |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 246 | bitvec_unhex(immediate_assignment, |
| 247 | "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
| 248 | if (sb) |
Holger Hans Peter Freyther | 63f29d6 | 2013-10-19 19:04:03 +0200 | [diff] [blame] | 249 | plen = Encoding::write_immediate_assignment(bts, immediate_assignment, 0, ra, |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 250 | Fn, qta >> 2, bts->trx[trx].arfcn, ts, |
Andreas Eversberg | aafcbbb | 2012-09-27 09:20:45 +0200 | [diff] [blame] | 251 | bts->trx[trx].pdch[ts].tsc, 0, 0, 0, 0, sb_fn, 1, |
Andreas Eversberg | afdd9e1 | 2012-10-07 17:08:55 +0200 | [diff] [blame] | 252 | bts->alpha, bts->gamma, -1); |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 253 | else |
Holger Hans Peter Freyther | 63f29d6 | 2013-10-19 19:04:03 +0200 | [diff] [blame] | 254 | plen = Encoding::write_immediate_assignment(bts, immediate_assignment, 0, ra, |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 255 | Fn, tbf->ta, tbf->arfcn, tbf->first_ts, tbf->tsc, |
Andreas Eversberg | aafcbbb | 2012-09-27 09:20:45 +0200 | [diff] [blame] | 256 | tbf->tfi, tbf->dir.ul.usf[tbf->first_ts], 0, 0, 0, 0, |
Andreas Eversberg | afdd9e1 | 2012-10-07 17:08:55 +0200 | [diff] [blame] | 257 | bts->alpha, bts->gamma, -1); |
Andreas Eversberg | 7b04501 | 2012-07-05 07:38:49 +0200 | [diff] [blame] | 258 | pcu_l1if_tx_agch(immediate_assignment, plen); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 259 | bitvec_free(immediate_assignment); |
| 260 | |
| 261 | return 0; |
| 262 | } |
| 263 | |
| 264 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 265 | /* send DL data block |
| 266 | * |
| 267 | * The messages are fragmented and forwarded as data blocks. |
| 268 | */ |
| 269 | struct msgb *gprs_rlcmac_send_data_block_acknowledged( |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 270 | struct gprs_rlcmac_tbf *tbf, uint32_t fn, uint8_t ts) |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 271 | { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 272 | struct rlc_dl_header *rh; |
| 273 | struct rlc_li_field *li; |
| 274 | uint8_t block_length; /* total length of block, including spare bits */ |
| 275 | uint8_t block_data; /* usable data of block, w/o spare bits, inc. MAC */ |
| 276 | struct msgb *msg, *dl_msg; |
| 277 | uint8_t bsn; |
| 278 | uint16_t mod_sns = tbf->sns - 1; |
| 279 | uint16_t mod_sns_half = (tbf->sns >> 1) - 1; |
| 280 | uint16_t index; |
| 281 | uint8_t *delimiter, *data, *e_pointer; |
| 282 | uint8_t len; |
| 283 | uint16_t space, chunk; |
Andreas Eversberg | 0c9b50c | 2012-10-07 15:50:51 +0200 | [diff] [blame] | 284 | int first_fin_ack = 0; |
Holger Hans Peter Freyther | b65e08a | 2013-10-20 17:10:25 +0200 | [diff] [blame] | 285 | gprs_rlcmac_bts *bts = tbf->bts->bts_data(); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 286 | |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 287 | LOGP(DRLCMACDL, LOGL_DEBUG, "DL DATA TBF=%d downlink (V(A)==%d .. " |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 288 | "V(S)==%d)\n", tbf->tfi, tbf->dir.dl.v_a, tbf->dir.dl.v_s); |
| 289 | |
| 290 | do_resend: |
| 291 | /* check if there is a block with negative acknowledgement */ |
| 292 | for (bsn = tbf->dir.dl.v_a; bsn != tbf->dir.dl.v_s; |
| 293 | bsn = (bsn + 1) & mod_sns) { |
| 294 | index = (bsn & mod_sns_half); |
| 295 | if (tbf->dir.dl.v_b[index] == 'N' |
| 296 | || tbf->dir.dl.v_b[index] == 'X') { |
| 297 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Resending BSN %d\n", |
| 298 | bsn); |
| 299 | /* re-send block with negative aknowlegement */ |
| 300 | tbf->dir.dl.v_b[index] = 'U'; /* unacked */ |
| 301 | goto tx_block; |
| 302 | } |
| 303 | } |
| 304 | |
| 305 | /* if the window has stalled, or transfer is complete, |
| 306 | * send an unacknowledged block */ |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 307 | if (tbf->state_is(GPRS_RLCMAC_FINISHED) |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 308 | || ((tbf->dir.dl.v_s - tbf->dir.dl.v_a) & mod_sns) == tbf->ws) { |
| 309 | int resend = 0; |
| 310 | |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 311 | if (tbf->state_is(GPRS_RLCMAC_FINISHED)) |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 312 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Restarting at BSN %d, " |
| 313 | "because all blocks have been transmitted.\n", |
| 314 | tbf->dir.dl.v_a); |
| 315 | else |
Andreas Eversberg | 4b470ff | 2012-07-16 12:02:40 +0200 | [diff] [blame] | 316 | LOGP(DRLCMACDL, LOGL_NOTICE, "- Restarting at BSN %d, " |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 317 | "because all window is stalled.\n", |
| 318 | tbf->dir.dl.v_a); |
| 319 | /* If V(S) == V(A) and finished state, we would have received |
| 320 | * acknowledgement of all transmitted block. In this case we |
| 321 | * would have transmitted the final block, and received ack |
| 322 | * from MS. But in this case we did not receive the final ack |
| 323 | * indication from MS. This should never happen if MS works |
| 324 | * correctly. */ |
| 325 | if (tbf->dir.dl.v_s == tbf->dir.dl.v_a) { |
Andreas Eversberg | 0c9b50c | 2012-10-07 15:50:51 +0200 | [diff] [blame] | 326 | LOGP(DRLCMACDL, LOGL_DEBUG, "- MS acked all blocks, " |
| 327 | "so we re-transmit final block!\n"); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 328 | /* we just send final block again */ |
| 329 | index = ((tbf->dir.dl.v_s - 1) & mod_sns_half); |
| 330 | goto tx_block; |
| 331 | } |
| 332 | |
| 333 | /* cycle through all unacked blocks */ |
| 334 | for (bsn = tbf->dir.dl.v_a; bsn != tbf->dir.dl.v_s; |
| 335 | bsn = (bsn + 1) & mod_sns) { |
| 336 | index = (bsn & mod_sns_half); |
| 337 | if (tbf->dir.dl.v_b[index] == 'U') { |
| 338 | /* mark to be re-send */ |
| 339 | tbf->dir.dl.v_b[index] = 'X'; |
| 340 | resend++; |
| 341 | } |
| 342 | } |
| 343 | /* At this point there should be at leasst one unacked block |
| 344 | * to be resent. If not, this is an software error. */ |
| 345 | if (resend == 0) { |
| 346 | LOGP(DRLCMACDL, LOGL_ERROR, "Software error: " |
| 347 | "There are no unacknowledged blocks, but V(A) " |
| 348 | " != V(S). PLEASE FIX!\n"); |
| 349 | /* we just send final block again */ |
| 350 | index = ((tbf->dir.dl.v_s - 1) & mod_sns_half); |
| 351 | goto tx_block; |
| 352 | } |
| 353 | goto do_resend; |
| 354 | } |
| 355 | |
| 356 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Sending new block at BSN %d\n", |
| 357 | tbf->dir.dl.v_s); |
| 358 | |
| 359 | /* now we still have untransmitted LLC data, so we fill mac block */ |
| 360 | index = tbf->dir.dl.v_s & mod_sns_half; |
| 361 | data = tbf->rlc_block[index]; |
Holger Hans Peter Freyther | b65e08a | 2013-10-20 17:10:25 +0200 | [diff] [blame] | 362 | #warning "Selection of the CS doesn't belong here" |
Andreas Eversberg | 3b1332c | 2012-10-03 14:20:53 +0200 | [diff] [blame] | 363 | if (tbf->cs == 0) { |
Andreas Eversberg | 499ff41 | 2012-10-03 14:21:36 +0200 | [diff] [blame] | 364 | tbf->cs = bts->initial_cs_dl; |
Andreas Eversberg | 3b1332c | 2012-10-03 14:20:53 +0200 | [diff] [blame] | 365 | if (tbf->cs < 1 || tbf->cs > 4) |
| 366 | tbf->cs = 1; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 367 | } |
Andreas Eversberg | 3b1332c | 2012-10-03 14:20:53 +0200 | [diff] [blame] | 368 | block_length = gprs_rlcmac_cs[tbf->cs].block_length; |
| 369 | block_data = gprs_rlcmac_cs[tbf->cs].block_data; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 370 | memset(data, 0x2b, block_data); /* spare bits will be left 0 */ |
| 371 | rh = (struct rlc_dl_header *)data; |
| 372 | rh->pt = 0; /* Data Block */ |
| 373 | rh->rrbp = rh->s_p = 0; /* Polling, set later, if required */ |
| 374 | rh->usf = 7; /* will be set at scheduler */ |
| 375 | rh->pr = 0; /* FIXME: power reduction */ |
| 376 | rh->tfi = tbf->tfi; /* TFI */ |
| 377 | rh->fbi = 0; /* Final Block Indicator, set late, if true */ |
| 378 | rh->bsn = tbf->dir.dl.v_s; /* Block Sequence Number */ |
| 379 | rh->e = 0; /* Extension bit, maybe set later */ |
| 380 | e_pointer = data + 2; /* points to E of current chunk */ |
| 381 | data += 3; |
| 382 | delimiter = data; /* where next length header would be stored */ |
| 383 | space = block_data - 3; |
| 384 | while (1) { |
| 385 | chunk = tbf->llc_length - tbf->llc_index; |
| 386 | /* if chunk will exceed block limit */ |
| 387 | if (chunk > space) { |
| 388 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- Chunk with length %d " |
| 389 | "larger than space (%d) left in block: copy " |
| 390 | "only remaining space, and we are done\n", |
| 391 | chunk, space); |
| 392 | /* block is filled, so there is no extension */ |
| 393 | *e_pointer |= 0x01; |
| 394 | /* fill only space */ |
| 395 | memcpy(data, tbf->llc_frame + tbf->llc_index, space); |
| 396 | /* incement index */ |
| 397 | tbf->llc_index += space; |
| 398 | /* return data block as message */ |
| 399 | break; |
| 400 | } |
| 401 | /* if FINAL chunk would fit precisely in space left */ |
| 402 | if (chunk == space && llist_empty(&tbf->llc_queue)) { |
| 403 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- Chunk with length %d " |
| 404 | "would exactly fit into space (%d): because " |
| 405 | "this is a final block, we don't add length " |
| 406 | "header, and we are done\n", chunk, space); |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 407 | LOGP(DRLCMACDL, LOGL_INFO, "Complete DL frame for " |
| 408 | "TBF=%d that fits precisely in last block: " |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 409 | "len=%d\n", tbf->tfi, tbf->llc_length); |
Andreas Eversberg | 050ace2 | 2013-03-16 16:22:02 +0100 | [diff] [blame] | 410 | gprs_rlcmac_dl_bw(tbf, tbf->llc_length); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 411 | /* block is filled, so there is no extension */ |
| 412 | *e_pointer |= 0x01; |
| 413 | /* fill space */ |
| 414 | memcpy(data, tbf->llc_frame + tbf->llc_index, space); |
| 415 | /* reset LLC frame */ |
| 416 | tbf->llc_index = tbf->llc_length = 0; |
| 417 | /* final block */ |
| 418 | rh->fbi = 1; /* we indicate final block */ |
| 419 | tbf_new_state(tbf, GPRS_RLCMAC_FINISHED); |
| 420 | /* return data block as message */ |
| 421 | break; |
| 422 | } |
| 423 | /* if chunk would fit exactly in space left */ |
| 424 | if (chunk == space) { |
| 425 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- Chunk with length %d " |
| 426 | "would exactly fit into space (%d): add length " |
| 427 | "header with LI=0, to make frame extend to " |
| 428 | "next block, and we are done\n", chunk, space); |
| 429 | /* make space for delimiter */ |
| 430 | if (delimiter != data) |
| 431 | memcpy(delimiter + 1, delimiter, |
| 432 | data - delimiter); |
| 433 | data++; |
| 434 | space--; |
| 435 | /* add LI with 0 length */ |
| 436 | li = (struct rlc_li_field *)delimiter; |
| 437 | li->e = 1; /* not more extension */ |
| 438 | li->m = 0; /* shall be set to 0, in case of li = 0 */ |
| 439 | li->li = 0; /* chunk fills the complete space */ |
| 440 | // no need to set e_pointer nor increase delimiter |
| 441 | /* fill only space, which is 1 octet less than chunk */ |
| 442 | memcpy(data, tbf->llc_frame + tbf->llc_index, space); |
| 443 | /* incement index */ |
| 444 | tbf->llc_index += space; |
| 445 | /* return data block as message */ |
| 446 | break; |
| 447 | } |
| 448 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- Chunk with length %d is less " |
| 449 | "than remaining space (%d): add length header to " |
| 450 | "to delimit LLC frame\n", chunk, space); |
| 451 | /* the LLC frame chunk ends in this block */ |
| 452 | /* make space for delimiter */ |
| 453 | if (delimiter != data) |
| 454 | memcpy(delimiter + 1, delimiter, data - delimiter); |
| 455 | data++; |
| 456 | space--; |
| 457 | /* add LI to delimit frame */ |
| 458 | li = (struct rlc_li_field *)delimiter; |
| 459 | li->e = 0; /* Extension bit, maybe set later */ |
| 460 | li->m = 0; /* will be set later, if there is more LLC data */ |
| 461 | li->li = chunk; /* length of chunk */ |
| 462 | e_pointer = delimiter; /* points to E of current delimiter */ |
| 463 | delimiter++; |
| 464 | /* copy (rest of) LLC frame to space */ |
| 465 | memcpy(data, tbf->llc_frame + tbf->llc_index, chunk); |
| 466 | data += chunk; |
| 467 | space -= chunk; |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 468 | LOGP(DRLCMACDL, LOGL_INFO, "Complete DL frame for TBF=%d: " |
| 469 | "len=%d\n", tbf->tfi, tbf->llc_length); |
Andreas Eversberg | 050ace2 | 2013-03-16 16:22:02 +0100 | [diff] [blame] | 470 | gprs_rlcmac_dl_bw(tbf, tbf->llc_length); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 471 | /* reset LLC frame */ |
| 472 | tbf->llc_index = tbf->llc_length = 0; |
| 473 | /* dequeue next LLC frame, if any */ |
Holger Hans Peter Freyther | 1702f10 | 2013-10-20 08:44:02 +0200 | [diff] [blame] | 474 | msg = tbf->llc_dequeue(gprs_bssgp_pcu_current_bctx()); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 475 | if (msg) { |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 476 | LOGP(DRLCMACDL, LOGL_INFO, "- Dequeue next LLC for " |
| 477 | "TBF=%d (len=%d)\n", tbf->tfi, msg->len); |
Holger Hans Peter Freyther | 1702f10 | 2013-10-20 08:44:02 +0200 | [diff] [blame] | 478 | tbf->update_llc_frame(msg); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 479 | msgb_free(msg); |
| 480 | } |
| 481 | /* if we have more data and we have space left */ |
| 482 | if (space > 0 && tbf->llc_length) { |
| 483 | li->m = 1; /* we indicate more frames to follow */ |
| 484 | continue; |
| 485 | } |
| 486 | /* if we don't have more LLC frames */ |
| 487 | if (!tbf->llc_length) { |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 488 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- Final block, so we " |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 489 | "done.\n"); |
| 490 | li->e = 1; /* we cannot extend */ |
| 491 | rh->fbi = 1; /* we indicate final block */ |
Andreas Eversberg | 5f14bd9 | 2012-10-03 14:20:26 +0200 | [diff] [blame] | 492 | first_fin_ack = 1; |
Andreas Eversberg | f54a89e | 2012-07-16 11:56:11 +0200 | [diff] [blame] | 493 | /* + 1 indicates: first final ack */ |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 494 | tbf_new_state(tbf, GPRS_RLCMAC_FINISHED); |
| 495 | break; |
| 496 | } |
| 497 | /* we have no space left */ |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 498 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- No space left, so we are " |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 499 | "done.\n"); |
| 500 | li->e = 1; /* we cannot extend */ |
| 501 | break; |
| 502 | } |
| 503 | LOGP(DRLCMACDL, LOGL_DEBUG, "data block: %s\n", |
| 504 | osmo_hexdump(tbf->rlc_block[index], block_length)); |
| 505 | tbf->rlc_block_len[index] = block_length; |
| 506 | /* raise send state and set ack state array */ |
| 507 | tbf->dir.dl.v_b[index] = 'U'; /* unacked */ |
| 508 | tbf->dir.dl.v_s = (tbf->dir.dl.v_s + 1) & mod_sns; /* inc send state */ |
| 509 | |
| 510 | tx_block: |
| 511 | /* from this point on, new block is sent or old block is resent */ |
| 512 | |
| 513 | /* get data and header from current block */ |
| 514 | data = tbf->rlc_block[index]; |
| 515 | len = tbf->rlc_block_len[index]; |
| 516 | rh = (struct rlc_dl_header *)data; |
| 517 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 518 | /* Clear Polling, if still set in history buffer */ |
| 519 | rh->s_p = 0; |
| 520 | |
Andreas Eversberg | f54a89e | 2012-07-16 11:56:11 +0200 | [diff] [blame] | 521 | /* poll after POLL_ACK_AFTER_FRAMES frames, or when final block is tx. |
| 522 | */ |
Andreas Eversberg | 5f14bd9 | 2012-10-03 14:20:26 +0200 | [diff] [blame] | 523 | if (tbf->dir.dl.tx_counter >= POLL_ACK_AFTER_FRAMES || first_fin_ack) { |
| 524 | if (first_fin_ack) { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 525 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Scheduling Ack/Nack " |
Andreas Eversberg | 5f14bd9 | 2012-10-03 14:20:26 +0200 | [diff] [blame] | 526 | "polling, because first final block sent.\n"); |
Andreas Eversberg | 5e043da | 2012-07-15 06:51:30 +0200 | [diff] [blame] | 527 | } else { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 528 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Scheduling Ack/Nack " |
| 529 | "polling, because %d blocks sent.\n", |
Andreas Eversberg | f54a89e | 2012-07-16 11:56:11 +0200 | [diff] [blame] | 530 | POLL_ACK_AFTER_FRAMES); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 531 | } |
Andreas Eversberg | 5e043da | 2012-07-15 06:51:30 +0200 | [diff] [blame] | 532 | /* scheduling not possible, because: */ |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 533 | if (tbf->poll_state != GPRS_RLCMAC_POLL_NONE) |
Andreas Eversberg | 5e043da | 2012-07-15 06:51:30 +0200 | [diff] [blame] | 534 | LOGP(DRLCMAC, LOGL_DEBUG, "Polling is already " |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 535 | "sheduled for TBF=%d, so we must wait for " |
| 536 | "requesting downlink ack\n", tbf->tfi); |
Andreas Eversberg | 5e043da | 2012-07-15 06:51:30 +0200 | [diff] [blame] | 537 | else if (tbf->control_ts != ts) |
| 538 | LOGP(DRLCMAC, LOGL_DEBUG, "Polling cannot be " |
| 539 | "sheduled in this TS %d, waiting for " |
| 540 | "TS %d\n", ts, tbf->control_ts); |
Holger Hans Peter Freyther | b65e08a | 2013-10-20 17:10:25 +0200 | [diff] [blame] | 541 | else if (tbf->bts->sba()->find(tbf->trx_no, ts, (fn + 13) % 2715648)) |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 542 | LOGP(DRLCMAC, LOGL_DEBUG, "Polling cannot be " |
| 543 | "sheduled, because single block alllocation " |
| 544 | "already exists\n"); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 545 | else { |
Andreas Eversberg | ee31b78 | 2012-07-15 16:27:01 +0200 | [diff] [blame] | 546 | LOGP(DRLCMAC, LOGL_DEBUG, "Polling sheduled in this " |
| 547 | "TS %d\n", ts); |
Andreas Eversberg | 5f14bd9 | 2012-10-03 14:20:26 +0200 | [diff] [blame] | 548 | tbf->dir.dl.tx_counter = 0; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 549 | /* start timer whenever we send the final block */ |
| 550 | if (rh->fbi == 1) |
Andreas Eversberg | dfa563c | 2012-07-06 08:13:59 +0200 | [diff] [blame] | 551 | tbf_timer_start(tbf, 3191, bts->t3191, 0); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 552 | |
| 553 | /* schedule polling */ |
| 554 | tbf->poll_state = GPRS_RLCMAC_POLL_SCHED; |
| 555 | tbf->poll_fn = (fn + 13) % 2715648; |
| 556 | |
Andreas Eversberg | b83e2a7 | 2012-10-07 15:26:00 +0200 | [diff] [blame] | 557 | #ifdef DEBUG_DIAGRAM |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 558 | debug_diagram(bts->bts, tbf->diag, "poll DL-ACK"); |
Andreas Eversberg | b83e2a7 | 2012-10-07 15:26:00 +0200 | [diff] [blame] | 559 | if (first_fin_ack) |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 560 | debug_diagram(bts->bts, tbf->diag, "(is first FINAL)"); |
Andreas Eversberg | b83e2a7 | 2012-10-07 15:26:00 +0200 | [diff] [blame] | 561 | if (rh->fbi) |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 562 | debug_diagram(bts->bts, tbf->diag, "(FBI is set)"); |
Andreas Eversberg | b83e2a7 | 2012-10-07 15:26:00 +0200 | [diff] [blame] | 563 | #endif |
| 564 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 565 | /* set polling in header */ |
| 566 | rh->rrbp = 0; /* N+13 */ |
| 567 | rh->s_p = 1; /* Polling */ |
Andreas Eversberg | 5e043da | 2012-07-15 06:51:30 +0200 | [diff] [blame] | 568 | |
| 569 | /* Increment TX-counter */ |
| 570 | tbf->dir.dl.tx_counter++; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 571 | } |
Andreas Eversberg | 5e043da | 2012-07-15 06:51:30 +0200 | [diff] [blame] | 572 | } else { |
| 573 | /* Increment TX-counter */ |
| 574 | tbf->dir.dl.tx_counter++; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 575 | } |
| 576 | |
| 577 | /* return data block as message */ |
| 578 | dl_msg = msgb_alloc(len, "rlcmac_dl_data"); |
| 579 | if (!dl_msg) |
| 580 | return NULL; |
| 581 | memcpy(msgb_put(dl_msg, len), data, len); |
| 582 | |
| 583 | return dl_msg; |
| 584 | } |
| 585 | |
Holger Hans Peter Freyther | b65e08a | 2013-10-20 17:10:25 +0200 | [diff] [blame] | 586 | int gprs_rlcmac_downlink_ack( |
Holger Hans Peter Freyther | 344ff48 | 2013-10-17 12:01:04 +0200 | [diff] [blame] | 587 | struct gprs_rlcmac_tbf *tbf, uint8_t final, |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 588 | uint8_t ssn, uint8_t *rbb) |
| 589 | { |
| 590 | char show_rbb[65], show_v_b[RLC_MAX_SNS + 1]; |
| 591 | uint16_t mod_sns = tbf->sns - 1; |
| 592 | uint16_t mod_sns_half = (tbf->sns >> 1) - 1; |
| 593 | int i; /* must be signed */ |
| 594 | int16_t dist; /* must be signed */ |
| 595 | uint8_t bit; |
| 596 | uint16_t bsn; |
| 597 | struct msgb *msg; |
Andreas Eversberg | 050ace2 | 2013-03-16 16:22:02 +0100 | [diff] [blame] | 598 | uint16_t lost = 0, received = 0; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 599 | |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 600 | LOGP(DRLCMACDL, LOGL_DEBUG, "TBF=%d downlink acknowledge\n", |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 601 | tbf->tfi); |
| 602 | |
| 603 | if (!final) { |
| 604 | /* show received array in debug (bit 64..1) */ |
| 605 | for (i = 63; i >= 0; i--) { |
| 606 | bit = (rbb[i >> 3] >> (7 - (i&7))) & 1; |
| 607 | show_rbb[i] = (bit) ? '1' : 'o'; |
| 608 | } |
| 609 | show_rbb[64] = '\0'; |
| 610 | LOGP(DRLCMACDL, LOGL_DEBUG, "- ack: (BSN=%d)\"%s\"" |
Andreas Eversberg | 4b470ff | 2012-07-16 12:02:40 +0200 | [diff] [blame] | 611 | "(BSN=%d) 1=ACK o=NACK\n", (ssn - 64) & mod_sns, |
| 612 | show_rbb, (ssn - 1) & mod_sns); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 613 | |
| 614 | /* apply received array to receive state (SSN-64..SSN-1) */ |
| 615 | /* calculate distance of ssn from V(S) */ |
| 616 | dist = (tbf->dir.dl.v_s - ssn) & mod_sns; |
| 617 | /* check if distance is less than distance V(A)..V(S) */ |
Andreas Eversberg | 050ace2 | 2013-03-16 16:22:02 +0100 | [diff] [blame] | 618 | if (dist >= ((tbf->dir.dl.v_s - tbf->dir.dl.v_a) & mod_sns)) { |
Andreas Eversberg | 0f13c40 | 2012-07-16 11:59:23 +0200 | [diff] [blame] | 619 | /* this might happpen, if the downlink assignment |
| 620 | * was not received by ms and the ack refers |
| 621 | * to previous TBF |
| 622 | * FIXME: we should implement polling for |
| 623 | * control ack!*/ |
| 624 | LOGP(DRLCMACDL, LOGL_NOTICE, "- ack range is out of " |
| 625 | "V(A)..V(S) range (DL TBF=%d) Free TFB!\n", |
| 626 | tbf->tfi); |
| 627 | return 1; /* indicate to free TBF */ |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 628 | } |
Andreas Eversberg | 050ace2 | 2013-03-16 16:22:02 +0100 | [diff] [blame] | 629 | /* SSN - 1 is in range V(A)..V(S)-1 */ |
| 630 | for (i = 63, bsn = (ssn - 1) & mod_sns; |
| 631 | i >= 0 && bsn != ((tbf->dir.dl.v_a - 1) & mod_sns); |
| 632 | i--, bsn = (bsn - 1) & mod_sns) { |
| 633 | bit = (rbb[i >> 3] >> (7 - (i&7))) & 1; |
| 634 | if (bit) { |
| 635 | LOGP(DRLCMACDL, LOGL_DEBUG, "- got " |
| 636 | "ack for BSN=%d\n", bsn); |
| 637 | if (tbf->dir.dl.v_b[bsn & mod_sns_half] |
| 638 | != 'A') |
| 639 | received++; |
| 640 | tbf->dir.dl.v_b[bsn & mod_sns_half] = 'A'; |
| 641 | } else { |
| 642 | LOGP(DRLCMACDL, LOGL_DEBUG, "- got " |
| 643 | "NACK for BSN=%d\n", bsn); |
| 644 | tbf->dir.dl.v_b[bsn & mod_sns_half] = 'N'; |
| 645 | lost++; |
| 646 | } |
| 647 | } |
| 648 | /* report lost and received packets */ |
| 649 | gprs_rlcmac_received_lost(tbf, received, lost); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 650 | |
| 651 | /* raise V(A), if possible */ |
| 652 | for (i = 0, bsn = tbf->dir.dl.v_a; bsn != tbf->dir.dl.v_s; |
| 653 | i++, bsn = (bsn + 1) & mod_sns) { |
| 654 | if (tbf->dir.dl.v_b[bsn & mod_sns_half] == 'A') { |
| 655 | tbf->dir.dl.v_b[bsn & mod_sns_half] = 'I'; |
| 656 | /* mark invalid */ |
| 657 | tbf->dir.dl.v_a = (tbf->dir.dl.v_a + 1) |
| 658 | & mod_sns; |
| 659 | } else |
| 660 | break; |
| 661 | } |
| 662 | |
| 663 | /* show receive state array in debug (V(A)..V(S)-1) */ |
| 664 | for (i = 0, bsn = tbf->dir.dl.v_a; bsn != tbf->dir.dl.v_s; |
| 665 | i++, bsn = (bsn + 1) & mod_sns) { |
| 666 | show_v_b[i] = tbf->dir.dl.v_b[bsn & mod_sns_half]; |
| 667 | if (show_v_b[i] == 0) |
| 668 | show_v_b[i] = ' '; |
| 669 | } |
| 670 | show_v_b[i] = '\0'; |
| 671 | LOGP(DRLCMACDL, LOGL_DEBUG, "- V(B): (V(A)=%d)\"%s\"" |
| 672 | "(V(S)-1=%d) A=Acked N=Nacked U=Unacked " |
| 673 | "X=Resend-Unacked\n", tbf->dir.dl.v_a, show_v_b, |
| 674 | (tbf->dir.dl.v_s - 1) & mod_sns); |
| 675 | |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 676 | if (tbf->state_is(GPRS_RLCMAC_FINISHED) |
Andreas Eversberg | 6664a90 | 2012-07-15 06:52:19 +0200 | [diff] [blame] | 677 | && tbf->dir.dl.v_s == tbf->dir.dl.v_a) { |
Andreas Eversberg | 0c9b50c | 2012-10-07 15:50:51 +0200 | [diff] [blame] | 678 | LOGP(DRLCMACDL, LOGL_NOTICE, "Received acknowledge of " |
| 679 | "all blocks, but without final ack " |
| 680 | "inidcation (don't worry)\n"); |
| 681 | } |
| 682 | return 0; |
Andreas Eversberg | b83e2a7 | 2012-10-07 15:26:00 +0200 | [diff] [blame] | 683 | } |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 684 | |
Andreas Eversberg | 0c9b50c | 2012-10-07 15:50:51 +0200 | [diff] [blame] | 685 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Final ACK received.\n"); |
Holger Hans Peter Freyther | b65e08a | 2013-10-20 17:10:25 +0200 | [diff] [blame] | 686 | debug_diagram(tbf->bts, tbf->diag, "got Final ACK"); |
Andreas Eversberg | 050ace2 | 2013-03-16 16:22:02 +0100 | [diff] [blame] | 687 | /* range V(A)..V(S)-1 */ |
| 688 | for (bsn = tbf->dir.dl.v_a; bsn != tbf->dir.dl.v_s; |
| 689 | bsn = (bsn + 1) & mod_sns) { |
| 690 | if (tbf->dir.dl.v_b[bsn & mod_sns_half] != 'A') |
| 691 | received++; |
| 692 | } |
| 693 | |
| 694 | /* report all outstanding packets as received */ |
| 695 | gprs_rlcmac_received_lost(tbf, received, lost); |
Andreas Eversberg | 0c9b50c | 2012-10-07 15:50:51 +0200 | [diff] [blame] | 696 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 697 | /* check for LLC PDU in the LLC Queue */ |
Holger Hans Peter Freyther | 1702f10 | 2013-10-20 08:44:02 +0200 | [diff] [blame] | 698 | msg = tbf->llc_dequeue(gprs_bssgp_pcu_current_bctx()); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 699 | if (!msg) { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 700 | /* no message, start T3193, change state to RELEASE */ |
| 701 | LOGP(DRLCMACDL, LOGL_DEBUG, "- No new message, so we " |
| 702 | "release.\n"); |
Andreas Eversberg | b3c6f6c | 2012-07-06 07:40:08 +0200 | [diff] [blame] | 703 | /* start T3193 */ |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 704 | debug_diagram(bts->bts, tbf->diag, "start T3193"); |
Holger Hans Peter Freyther | b65e08a | 2013-10-20 17:10:25 +0200 | [diff] [blame] | 705 | tbf_timer_start(tbf, 3193, |
| 706 | tbf->bts->bts_data()->t3193_msec / 1000, |
| 707 | (tbf->bts->bts_data()->t3193_msec % 1000) * 1000); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 708 | tbf_new_state(tbf, GPRS_RLCMAC_WAIT_RELEASE); |
| 709 | |
| 710 | return 0; |
| 711 | } |
Holger Hans Peter Freyther | 1702f10 | 2013-10-20 08:44:02 +0200 | [diff] [blame] | 712 | #warning "Copy and paste on the sender path" |
| 713 | tbf->update_llc_frame(msg); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 714 | msgb_free(msg); |
| 715 | |
| 716 | /* we have a message, so we trigger downlink assignment, and there |
| 717 | * set the state to ASSIGN. also we set old_downlink, because we |
| 718 | * re-use this tbf. */ |
| 719 | LOGP(DRLCMAC, LOGL_DEBUG, "Trigger dowlink assignment on PACCH, " |
| 720 | "because another LLC PDU has arrived in between\n"); |
| 721 | memset(&tbf->dir.dl, 0, sizeof(tbf->dir.dl)); /* reset RLC states */ |
Andreas Eversberg | a9be154 | 2012-09-27 09:23:24 +0200 | [diff] [blame] | 722 | tbf->state_flags &= GPRS_RLCMAC_FLAG_TO_MASK; /* keep TO flags */ |
| 723 | tbf->state_flags &= ~(1 << GPRS_RLCMAC_FLAG_CCCH); |
Holger Hans Peter Freyther | aa9c326 | 2013-10-26 17:49:36 +0200 | [diff] [blame] | 724 | tbf->update(); |
Holger Hans Peter Freyther | 24c1a5b | 2013-10-26 20:27:44 +0200 | [diff] [blame^] | 725 | tbf->bts->trigger_dl_ass(tbf, tbf, NULL); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 726 | return 0; |
| 727 | } |
| 728 | |
| 729 | |
| 730 | struct msgb *gprs_rlcmac_send_packet_downlink_assignment( |
| 731 | struct gprs_rlcmac_tbf *tbf, uint32_t fn) |
| 732 | { |
| 733 | struct msgb *msg; |
| 734 | struct gprs_rlcmac_tbf *new_tbf; |
Holger Hans Peter Freyther | b65e08a | 2013-10-20 17:10:25 +0200 | [diff] [blame] | 735 | gprs_rlcmac_bts *bts = tbf->bts->bts_data(); |
Andreas Eversberg | 802bb6e | 2012-08-06 11:15:05 +0200 | [diff] [blame] | 736 | int poll_ass_dl = POLLING_ASSIGNMENT_DL; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 737 | |
Andreas Eversberg | 802bb6e | 2012-08-06 11:15:05 +0200 | [diff] [blame] | 738 | if (poll_ass_dl && tbf->direction == GPRS_RLCMAC_DL_TBF |
| 739 | && tbf->control_ts != tbf->first_common_ts) { |
| 740 | LOGP(DRLCMAC, LOGL_NOTICE, "Cannot poll for downlink " |
Andreas Eversberg | f01929b | 2012-10-08 12:40:49 +0200 | [diff] [blame] | 741 | "assigment, because MS cannot reply. (control TS=%d, " |
| 742 | "first common TS=%d)\n", tbf->control_ts, |
| 743 | tbf->first_common_ts); |
Andreas Eversberg | 802bb6e | 2012-08-06 11:15:05 +0200 | [diff] [blame] | 744 | poll_ass_dl = 0; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 745 | } |
Andreas Eversberg | 802bb6e | 2012-08-06 11:15:05 +0200 | [diff] [blame] | 746 | if (poll_ass_dl) { |
| 747 | if (tbf->poll_state != GPRS_RLCMAC_POLL_NONE) { |
| 748 | LOGP(DRLCMAC, LOGL_DEBUG, "Polling is already sheduled " |
| 749 | "for TBF=%d, so we must wait for downlink " |
| 750 | "assignment...\n", tbf->tfi); |
| 751 | return NULL; |
| 752 | } |
Holger Hans Peter Freyther | b65e08a | 2013-10-20 17:10:25 +0200 | [diff] [blame] | 753 | if (tbf->bts->sba()->find(tbf->trx_no, tbf->control_ts, (fn + 13) % 2715648)) { |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 754 | LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already " |
| 755 | "scheduled for single block allocation...\n"); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 756 | return NULL; |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 757 | } |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 758 | } |
| 759 | |
| 760 | /* on uplink TBF we get the downlink TBF to be assigned. */ |
Andreas Eversberg | ee31b78 | 2012-07-15 16:27:01 +0200 | [diff] [blame] | 761 | if (tbf->direction == GPRS_RLCMAC_UL_TBF) { |
| 762 | /* be sure to check first, if contention resolution is done, |
| 763 | * otherwise we cannot send the assignment yet */ |
Andreas Eversberg | 08e93cd | 2012-07-26 08:13:06 +0200 | [diff] [blame] | 764 | if (!tbf->dir.ul.contention_resolution_done) { |
Andreas Eversberg | 7f5352c | 2012-07-23 18:20:36 +0200 | [diff] [blame] | 765 | LOGP(DRLCMAC, LOGL_DEBUG, "Cannot assign DL TBF now, " |
Andreas Eversberg | ee31b78 | 2012-07-15 16:27:01 +0200 | [diff] [blame] | 766 | "because contention resolution is not " |
| 767 | "finished.\n"); |
| 768 | return NULL; |
| 769 | } |
Holger Hans Peter Freyther | b65e08a | 2013-10-20 17:10:25 +0200 | [diff] [blame] | 770 | new_tbf = tbf->bts->tbf_by_tlli(tbf->tlli, GPRS_RLCMAC_DL_TBF); |
Andreas Eversberg | ee31b78 | 2012-07-15 16:27:01 +0200 | [diff] [blame] | 771 | } else |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 772 | new_tbf = tbf; |
| 773 | if (!new_tbf) { |
| 774 | LOGP(DRLCMACDL, LOGL_ERROR, "We have a schedule for downlink " |
| 775 | "assignment at uplink TBF=%d, but there is no downlink " |
| 776 | "TBF\n", tbf->tfi); |
| 777 | tbf->dl_ass_state = GPRS_RLCMAC_DL_ASS_NONE; |
| 778 | return NULL; |
| 779 | } |
| 780 | |
| 781 | msg = msgb_alloc(23, "rlcmac_dl_ass"); |
| 782 | if (!msg) |
| 783 | return NULL; |
| 784 | bitvec *ass_vec = bitvec_alloc(23); |
| 785 | if (!ass_vec) { |
| 786 | msgb_free(msg); |
| 787 | return NULL; |
| 788 | } |
| 789 | bitvec_unhex(ass_vec, |
| 790 | "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 791 | LOGP(DRLCMAC, LOGL_INFO, "TBF: START TFI: %u TLLI: 0x%08x Packet Downlink Assignment (PACCH)\n", new_tbf->tfi, new_tbf->tlli); |
Andreas Eversberg | 6681bb8 | 2012-07-25 08:48:44 +0200 | [diff] [blame] | 792 | RlcMacDownlink_t * mac_control_block = (RlcMacDownlink_t *)talloc_zero(tall_pcu_ctx, RlcMacDownlink_t); |
Holger Hans Peter Freyther | 63f29d6 | 2013-10-19 19:04:03 +0200 | [diff] [blame] | 793 | Encoding::write_packet_downlink_assignment(mac_control_block, tbf->tfi, |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 794 | (tbf->direction == GPRS_RLCMAC_DL_TBF), new_tbf, |
Andreas Eversberg | afdd9e1 | 2012-10-07 17:08:55 +0200 | [diff] [blame] | 795 | poll_ass_dl, bts->alpha, bts->gamma, -1, 0); |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 796 | LOGP(DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ TX : Packet Downlink Assignment +++++++++++++++++++++++++\n"); |
Ivan Kluchnikov | ef7f28c | 2012-07-12 14:49:15 +0400 | [diff] [blame] | 797 | encode_gsm_rlcmac_downlink(ass_vec, mac_control_block); |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 798 | LOGPC(DCSN1, LOGL_NOTICE, "\n"); |
| 799 | LOGP(DRLCMAC, LOGL_DEBUG, "------------------------- TX : Packet Downlink Assignment -------------------------\n"); |
Ivan Kluchnikov | ef7f28c | 2012-07-12 14:49:15 +0400 | [diff] [blame] | 800 | bitvec_pack(ass_vec, msgb_put(msg, 23)); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 801 | bitvec_free(ass_vec); |
Andreas Eversberg | 6681bb8 | 2012-07-25 08:48:44 +0200 | [diff] [blame] | 802 | talloc_free(mac_control_block); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 803 | |
Andreas Eversberg | 802bb6e | 2012-08-06 11:15:05 +0200 | [diff] [blame] | 804 | if (poll_ass_dl) { |
| 805 | tbf->poll_state = GPRS_RLCMAC_POLL_SCHED; |
| 806 | tbf->poll_fn = (fn + 13) % 2715648; |
| 807 | tbf->dl_ass_state = GPRS_RLCMAC_DL_ASS_WAIT_ACK; |
| 808 | } else { |
| 809 | tbf->dl_ass_state = GPRS_RLCMAC_DL_ASS_NONE; |
| 810 | tbf_new_state(new_tbf, GPRS_RLCMAC_FLOW); |
| 811 | tbf_assign_control_ts(new_tbf); |
Andreas Eversberg | cbcd124 | 2012-08-07 15:48:21 +0200 | [diff] [blame] | 812 | /* stop pending assignment timer */ |
Holger Hans Peter Freyther | 86300bb | 2013-10-26 18:01:35 +0200 | [diff] [blame] | 813 | new_tbf->stop_timer(); |
Andreas Eversberg | cbcd124 | 2012-08-07 15:48:21 +0200 | [diff] [blame] | 814 | |
Andreas Eversberg | 802bb6e | 2012-08-06 11:15:05 +0200 | [diff] [blame] | 815 | } |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 816 | debug_diagram(bts->bts, tbf->diag, "send DL-ASS"); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 817 | |
| 818 | return msg; |
| 819 | } |
| 820 | |