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> |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 27 | |
Holger Hans Peter Freyther | 7ce21eb | 2013-10-20 08:28:25 +0200 | [diff] [blame] | 28 | static struct gprs_rlcmac_cs gprs_rlcmac_cs[] = { |
| 29 | /* frame length data block max payload */ |
| 30 | { 0, 0, 0 }, |
| 31 | { 23, 23, 20 }, /* CS-1 */ |
| 32 | { 34, 33, 30 }, /* CS-2 */ |
| 33 | { 40, 39, 36 }, /* CS-3 */ |
| 34 | { 54, 53, 50 }, /* CS-4 */ |
| 35 | }; |
| 36 | |
| 37 | |
Andreas Eversberg | 6681bb8 | 2012-07-25 08:48:44 +0200 | [diff] [blame] | 38 | extern void *tall_pcu_ctx; |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 39 | |
Andreas Eversberg | f54a89e | 2012-07-16 11:56:11 +0200 | [diff] [blame] | 40 | /* After receiving these frames, we send ack/nack. */ |
| 41 | #define SEND_ACK_AFTER_FRAMES 20 |
| 42 | |
| 43 | /* After sending these frames, we poll for ack/nack. */ |
Andreas Eversberg | 5f14bd9 | 2012-10-03 14:20:26 +0200 | [diff] [blame] | 44 | #define POLL_ACK_AFTER_FRAMES 20 |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 45 | |
Andreas Eversberg | 802bb6e | 2012-08-06 11:15:05 +0200 | [diff] [blame] | 46 | /* If acknowledgement to uplink/downlink assignmentshould be polled */ |
| 47 | #define POLLING_ASSIGNMENT_DL 1 |
| 48 | #define POLLING_ASSIGNMENT_UL 1 |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 49 | |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 50 | extern "C" { |
| 51 | /* TS 04.60 10.2.2 */ |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 52 | struct rlc_ul_header { |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 53 | uint8_t r:1, |
| 54 | si:1, |
| 55 | cv:4, |
| 56 | pt:2; |
| 57 | uint8_t ti:1, |
| 58 | tfi:5, |
| 59 | pi:1, |
| 60 | spare:1; |
| 61 | uint8_t e:1, |
| 62 | bsn:7; |
| 63 | } __attribute__ ((packed)); |
| 64 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 65 | struct rlc_dl_header { |
| 66 | uint8_t usf:3, |
| 67 | s_p:1, |
| 68 | rrbp:2, |
| 69 | pt:2; |
| 70 | uint8_t fbi:1, |
| 71 | tfi:5, |
| 72 | pr:2; |
| 73 | uint8_t e:1, |
| 74 | bsn:7; |
| 75 | } __attribute__ ((packed)); |
| 76 | |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 77 | struct rlc_li_field { |
| 78 | uint8_t e:1, |
| 79 | m:1, |
| 80 | li:6; |
| 81 | } __attribute__ ((packed)); |
| 82 | } |
| 83 | |
Holger Hans Peter Freyther | 344ff48 | 2013-10-17 12:01:04 +0200 | [diff] [blame] | 84 | static void gprs_rlcmac_downlink_assignment(struct gprs_rlcmac_bts *bts, |
| 85 | gprs_rlcmac_tbf *tbf, uint8_t poll, |
Holger Hans Peter Freyther | 52c911b | 2013-08-24 18:30:54 +0200 | [diff] [blame] | 86 | const char *imsi); |
Andreas Eversberg | a9be154 | 2012-09-27 09:23:24 +0200 | [diff] [blame] | 87 | |
Andreas Eversberg | 14db19e | 2012-08-06 15:03:03 +0200 | [diff] [blame] | 88 | static int gprs_rlcmac_diag(struct gprs_rlcmac_tbf *tbf) |
| 89 | { |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 90 | return tbf->rlcmac_diag(); |
Andreas Eversberg | 14db19e | 2012-08-06 15:03:03 +0200 | [diff] [blame] | 91 | } |
| 92 | |
Holger Hans Peter Freyther | 344ff48 | 2013-10-17 12:01:04 +0200 | [diff] [blame] | 93 | int gprs_rlcmac_poll_timeout(struct gprs_rlcmac_bts *bts, struct gprs_rlcmac_tbf *tbf) |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 94 | { |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 95 | LOGP(DRLCMAC, LOGL_NOTICE, "Poll timeout for %s TBF=%d\n", |
| 96 | (tbf->direction == GPRS_RLCMAC_UL_TBF) ? "UL" : "DL", tbf->tfi); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 97 | |
| 98 | tbf->poll_state = GPRS_RLCMAC_POLL_NONE; |
| 99 | |
| 100 | if (tbf->ul_ack_state == GPRS_RLCMAC_UL_ACK_WAIT_ACK) { |
Andreas Eversberg | 14db19e | 2012-08-06 15:03:03 +0200 | [diff] [blame] | 101 | if (!(tbf->state_flags & (1 << GPRS_RLCMAC_FLAG_TO_UL_ACK))) { |
| 102 | LOGP(DRLCMAC, LOGL_NOTICE, "- Timeout for polling " |
| 103 | "PACKET CONTROL ACK for PACKET UPLINK ACK\n"); |
| 104 | gprs_rlcmac_diag(tbf); |
| 105 | tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_TO_UL_ACK); |
| 106 | } |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 107 | tbf->ul_ack_state = GPRS_RLCMAC_UL_ACK_NONE; |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 108 | debug_diagram(bts->bts, tbf->diag, "timeout UL-ACK"); |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 109 | if (tbf->state_is(GPRS_RLCMAC_FINISHED)) { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 110 | tbf->dir.ul.n3103++; |
Andreas Eversberg | dfa563c | 2012-07-06 08:13:59 +0200 | [diff] [blame] | 111 | if (tbf->dir.ul.n3103 == bts->n3103) { |
Andreas Eversberg | 4b470ff | 2012-07-16 12:02:40 +0200 | [diff] [blame] | 112 | LOGP(DRLCMAC, LOGL_NOTICE, |
| 113 | "- N3103 exceeded\n"); |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 114 | debug_diagram(bts->bts, tbf->diag, "N3103 exceeded"); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 115 | tbf_new_state(tbf, GPRS_RLCMAC_RELEASING); |
Andreas Eversberg | dfa563c | 2012-07-06 08:13:59 +0200 | [diff] [blame] | 116 | tbf_timer_start(tbf, 3169, bts->t3169, 0); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 117 | return 0; |
| 118 | } |
| 119 | /* reschedule UL ack */ |
| 120 | tbf->ul_ack_state = GPRS_RLCMAC_UL_ACK_SEND_ACK; |
| 121 | } |
| 122 | } else |
| 123 | if (tbf->ul_ass_state == GPRS_RLCMAC_UL_ASS_WAIT_ACK) { |
Andreas Eversberg | 14db19e | 2012-08-06 15:03:03 +0200 | [diff] [blame] | 124 | if (!(tbf->state_flags & (1 << GPRS_RLCMAC_FLAG_TO_UL_ASS))) { |
| 125 | LOGP(DRLCMAC, LOGL_NOTICE, "- Timeout for polling " |
| 126 | "PACKET CONTROL ACK for PACKET UPLINK " |
| 127 | "ASSIGNMENT.\n"); |
| 128 | gprs_rlcmac_diag(tbf); |
| 129 | tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_TO_UL_ASS); |
| 130 | } |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 131 | tbf->ul_ass_state = GPRS_RLCMAC_UL_ASS_NONE; |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 132 | debug_diagram(bts->bts, tbf->diag, "timeout UL-ASS"); |
Andreas Eversberg | 802bb6e | 2012-08-06 11:15:05 +0200 | [diff] [blame] | 133 | tbf->n3105++; |
| 134 | if (tbf->n3105 == bts->n3105) { |
| 135 | LOGP(DRLCMAC, LOGL_NOTICE, "- N3105 exceeded\n"); |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 136 | debug_diagram(bts->bts, tbf->diag, "N3105 exceeded"); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 137 | tbf_new_state(tbf, GPRS_RLCMAC_RELEASING); |
Andreas Eversberg | dfa563c | 2012-07-06 08:13:59 +0200 | [diff] [blame] | 138 | tbf_timer_start(tbf, 3195, bts->t3195, 0); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 139 | return 0; |
| 140 | } |
Andreas Eversberg | 802bb6e | 2012-08-06 11:15:05 +0200 | [diff] [blame] | 141 | /* reschedule UL assignment */ |
| 142 | tbf->ul_ass_state = GPRS_RLCMAC_UL_ASS_SEND_ASS; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 143 | } else |
| 144 | if (tbf->dl_ass_state == GPRS_RLCMAC_DL_ASS_WAIT_ACK) { |
Andreas Eversberg | 14db19e | 2012-08-06 15:03:03 +0200 | [diff] [blame] | 145 | if (!(tbf->state_flags & (1 << GPRS_RLCMAC_FLAG_TO_DL_ASS))) { |
| 146 | LOGP(DRLCMAC, LOGL_NOTICE, "- Timeout for polling " |
| 147 | "PACKET CONTROL ACK for PACKET DOWNLINK " |
| 148 | "ASSIGNMENT.\n"); |
| 149 | gprs_rlcmac_diag(tbf); |
| 150 | tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_TO_DL_ASS); |
| 151 | } |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 152 | tbf->dl_ass_state = GPRS_RLCMAC_DL_ASS_NONE; |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 153 | debug_diagram(bts->bts, tbf->diag, "timeout DL-ASS"); |
Andreas Eversberg | 802bb6e | 2012-08-06 11:15:05 +0200 | [diff] [blame] | 154 | tbf->n3105++; |
| 155 | if (tbf->n3105 == bts->n3105) { |
| 156 | LOGP(DRLCMAC, LOGL_NOTICE, "- N3105 exceeded\n"); |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 157 | debug_diagram(bts->bts, tbf->diag, "N3105 exceeded"); |
Andreas Eversberg | 802bb6e | 2012-08-06 11:15:05 +0200 | [diff] [blame] | 158 | tbf_new_state(tbf, GPRS_RLCMAC_RELEASING); |
| 159 | tbf_timer_start(tbf, 3195, bts->t3195, 0); |
| 160 | return 0; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 161 | } |
Andreas Eversberg | 802bb6e | 2012-08-06 11:15:05 +0200 | [diff] [blame] | 162 | /* reschedule DL assignment */ |
| 163 | tbf->dl_ass_state = GPRS_RLCMAC_DL_ASS_SEND_ASS; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 164 | } else |
Andreas Eversberg | 802bb6e | 2012-08-06 11:15:05 +0200 | [diff] [blame] | 165 | if (tbf->direction == GPRS_RLCMAC_DL_TBF) { |
Andreas Eversberg | 14db19e | 2012-08-06 15:03:03 +0200 | [diff] [blame] | 166 | if (!(tbf->state_flags & (1 << GPRS_RLCMAC_FLAG_TO_DL_ACK))) { |
| 167 | LOGP(DRLCMAC, LOGL_NOTICE, "- Timeout for polling " |
| 168 | "PACKET DOWNLINK ACK.\n"); |
| 169 | gprs_rlcmac_diag(tbf); |
| 170 | tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_TO_DL_ACK); |
| 171 | } |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 172 | debug_diagram(bts->bts, tbf->diag, "timeout DL-ACK"); |
Andreas Eversberg | 802bb6e | 2012-08-06 11:15:05 +0200 | [diff] [blame] | 173 | tbf->n3105++; |
| 174 | if (tbf->n3105 == bts->n3105) { |
Andreas Eversberg | 4b470ff | 2012-07-16 12:02:40 +0200 | [diff] [blame] | 175 | LOGP(DRLCMAC, LOGL_NOTICE, "- N3105 exceeded\n"); |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 176 | debug_diagram(bts->bts, tbf->diag, "N3105 exceeded"); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 177 | tbf_new_state(tbf, GPRS_RLCMAC_RELEASING); |
| 178 | tbf_timer_start(tbf, 3195, bts->t3195, 0); |
| 179 | return 0; |
| 180 | } |
Andreas Eversberg | a9be154 | 2012-09-27 09:23:24 +0200 | [diff] [blame] | 181 | /* resend IMM.ASS on CCCH on timeout */ |
| 182 | if ((tbf->state_flags & (1 << GPRS_RLCMAC_FLAG_CCCH)) |
| 183 | && !(tbf->state_flags & (1 << GPRS_RLCMAC_FLAG_DL_ACK))) { |
| 184 | LOGP(DRLCMAC, LOGL_DEBUG, "Re-send dowlink assignment " |
| 185 | "for TBF=%d on PCH (IMSI=%s)\n", tbf->tfi, |
| 186 | tbf->dir.dl.imsi); |
| 187 | /* send immediate assignment */ |
Holger Hans Peter Freyther | 344ff48 | 2013-10-17 12:01:04 +0200 | [diff] [blame] | 188 | gprs_rlcmac_downlink_assignment(bts, tbf, 0, tbf->dir.dl.imsi); |
Andreas Eversberg | a9be154 | 2012-09-27 09:23:24 +0200 | [diff] [blame] | 189 | tbf->dir.dl.wait_confirm = 1; |
| 190 | } |
Andreas Eversberg | 4b470ff | 2012-07-16 12:02:40 +0200 | [diff] [blame] | 191 | } else |
| 192 | LOGP(DRLCMAC, LOGL_ERROR, "- Poll Timeout, but no event!\n"); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 193 | |
| 194 | return 0; |
| 195 | } |
| 196 | |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 197 | static uint8_t get_ms_class_by_capability(MS_Radio_Access_capability_t *cap) |
| 198 | { |
| 199 | int i; |
| 200 | |
| 201 | for (i = 0; i < cap->Count_MS_RA_capability_value; i++) { |
| 202 | if (!cap->MS_RA_capability_value[i].u.Content.Exist_Multislot_capability) |
| 203 | continue; |
| 204 | if (!cap->MS_RA_capability_value[i].u.Content.Multislot_capability.Exist_GPRS_multislot_class) |
| 205 | continue; |
| 206 | return cap->MS_RA_capability_value[i].u.Content.Multislot_capability.GPRS_multislot_class; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 207 | } |
| 208 | |
| 209 | return 0; |
| 210 | } |
| 211 | |
| 212 | /* Received Uplink RLC control block. */ |
Holger Hans Peter Freyther | 8d7a632 | 2013-10-17 15:23:49 +0200 | [diff] [blame] | 213 | int gprs_rlcmac_rcv_control_block(struct gprs_rlcmac_bts *bts, |
| 214 | bitvec *rlc_block, uint8_t trx, uint8_t ts, |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 215 | uint32_t fn) |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 216 | { |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 217 | int8_t tfi = 0; /* must be signed */ |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 218 | uint32_t tlli = 0; |
| 219 | struct gprs_rlcmac_tbf *tbf; |
Andreas Eversberg | a004e6a | 2013-05-13 16:45:21 +0200 | [diff] [blame] | 220 | struct gprs_rlcmac_sba *sba; |
Andreas Eversberg | 0f13c40 | 2012-07-16 11:59:23 +0200 | [diff] [blame] | 221 | int rc; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 222 | |
Andreas Eversberg | 6681bb8 | 2012-07-25 08:48:44 +0200 | [diff] [blame] | 223 | RlcMacUplink_t * ul_control_block = (RlcMacUplink_t *)talloc_zero(tall_pcu_ctx, RlcMacUplink_t); |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 224 | LOGP(DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ RX : Uplink Control Block +++++++++++++++++++++++++\n"); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 225 | decode_gsm_rlcmac_uplink(rlc_block, ul_control_block); |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 226 | LOGPC(DCSN1, LOGL_NOTICE, "\n"); |
| 227 | LOGP(DRLCMAC, LOGL_DEBUG, "------------------------- RX : Uplink Control Block -------------------------\n"); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 228 | switch (ul_control_block->u.MESSAGE_TYPE) { |
| 229 | case MT_PACKET_CONTROL_ACK: |
| 230 | tlli = ul_control_block->u.Packet_Control_Acknowledgement.TLLI; |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 231 | tbf = bts->bts->tbf_by_poll_fn(fn, trx, ts); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 232 | if (!tbf) { |
| 233 | LOGP(DRLCMAC, LOGL_NOTICE, "PACKET CONTROL ACK with " |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 234 | "unknown FN=%u TLL=0x%08x (TRX %d TS %d)\n", |
| 235 | fn, tlli, trx, ts); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 236 | break; |
| 237 | } |
| 238 | tfi = tbf->tfi; |
| 239 | if (tlli != tbf->tlli) { |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 240 | LOGP(DRLCMAC, LOGL_INFO, "Phone changed TLLI to " |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 241 | "0x%08x\n", tlli); |
| 242 | tbf->tlli = tlli; |
| 243 | } |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 244 | LOGP(DRLCMAC, LOGL_DEBUG, "RX: [PCU <- BTS] TFI: %u TLLI: 0x%08x Packet Control Ack\n", tbf->tfi, tbf->tlli); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 245 | tbf->poll_state = GPRS_RLCMAC_POLL_NONE; |
| 246 | |
| 247 | /* check if this control ack belongs to packet uplink ack */ |
| 248 | if (tbf->ul_ack_state == GPRS_RLCMAC_UL_ACK_WAIT_ACK) { |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 249 | LOGP(DRLCMAC, LOGL_DEBUG, "TBF: [UPLINK] END TFI: %u TLLI: 0x%08x \n", tbf->tfi, tbf->tlli); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 250 | tbf->ul_ack_state = GPRS_RLCMAC_UL_ACK_NONE; |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 251 | debug_diagram(bts->bts, tbf->diag, "got CTL-ACK (fin)"); |
Andreas Eversberg | 14db19e | 2012-08-06 15:03:03 +0200 | [diff] [blame] | 252 | if ((tbf->state_flags & |
| 253 | (1 << GPRS_RLCMAC_FLAG_TO_UL_ACK))) { |
| 254 | tbf->state_flags &= |
| 255 | ~(1 << GPRS_RLCMAC_FLAG_TO_UL_ACK); |
| 256 | LOGP(DRLCMAC, LOGL_NOTICE, "Recovered uplink " |
Andreas Eversberg | b83e2a7 | 2012-10-07 15:26:00 +0200 | [diff] [blame] | 257 | "ack for UL TBF=%d\n", tbf->tfi); |
Andreas Eversberg | 14db19e | 2012-08-06 15:03:03 +0200 | [diff] [blame] | 258 | } |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 259 | tbf_free(tbf); |
| 260 | break; |
| 261 | } |
| 262 | if (tbf->dl_ass_state == GPRS_RLCMAC_DL_ASS_WAIT_ACK) { |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 263 | LOGP(DRLCMAC, LOGL_DEBUG, "TBF: [UPLINK] DOWNLINK ASSIGNED TFI: %u TLLI: 0x%08x \n", tbf->tfi, tbf->tlli); |
Andreas Eversberg | 802bb6e | 2012-08-06 11:15:05 +0200 | [diff] [blame] | 264 | /* reset N3105 */ |
| 265 | tbf->n3105 = 0; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 266 | tbf->dl_ass_state = GPRS_RLCMAC_DL_ASS_NONE; |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 267 | debug_diagram(bts->bts, tbf->diag, "got CTL-ACK DL-ASS"); |
Andreas Eversberg | 642c7d3 | 2012-07-23 17:58:55 +0200 | [diff] [blame] | 268 | if (tbf->direction == GPRS_RLCMAC_UL_TBF) |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 269 | tbf = bts->bts->tbf_by_tlli(tbf->tlli, |
Andreas Eversberg | 642c7d3 | 2012-07-23 17:58:55 +0200 | [diff] [blame] | 270 | GPRS_RLCMAC_DL_TBF); |
| 271 | if (!tbf) { |
| 272 | LOGP(DRLCMAC, LOGL_ERROR, "Got ACK, but DL " |
| 273 | "TBF is gone\n"); |
| 274 | break; |
| 275 | } |
| 276 | tbf_new_state(tbf, GPRS_RLCMAC_FLOW); |
Andreas Eversberg | cbcd124 | 2012-08-07 15:48:21 +0200 | [diff] [blame] | 277 | /* stop pending assignment timer */ |
| 278 | tbf_timer_stop(tbf); |
Andreas Eversberg | 14db19e | 2012-08-06 15:03:03 +0200 | [diff] [blame] | 279 | if ((tbf->state_flags & |
| 280 | (1 << GPRS_RLCMAC_FLAG_TO_DL_ASS))) { |
| 281 | tbf->state_flags &= |
| 282 | ~(1 << GPRS_RLCMAC_FLAG_TO_DL_ASS); |
| 283 | LOGP(DRLCMAC, LOGL_NOTICE, "Recovered downlink " |
Andreas Eversberg | b83e2a7 | 2012-10-07 15:26:00 +0200 | [diff] [blame] | 284 | "assignment for DL TBF=%d\n", tbf->tfi); |
Andreas Eversberg | 14db19e | 2012-08-06 15:03:03 +0200 | [diff] [blame] | 285 | } |
Andreas Eversberg | 642c7d3 | 2012-07-23 17:58:55 +0200 | [diff] [blame] | 286 | tbf_assign_control_ts(tbf); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 287 | break; |
| 288 | } |
| 289 | if (tbf->ul_ass_state == GPRS_RLCMAC_UL_ASS_WAIT_ACK) { |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 290 | LOGP(DRLCMAC, LOGL_DEBUG, "TBF: [DOWNLINK] UPLINK ASSIGNED TFI: %u TLLI: 0x%08x \n", tbf->tfi, tbf->tlli); |
Andreas Eversberg | 802bb6e | 2012-08-06 11:15:05 +0200 | [diff] [blame] | 291 | /* reset N3105 */ |
| 292 | tbf->n3105 = 0; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 293 | tbf->ul_ass_state = GPRS_RLCMAC_UL_ASS_NONE; |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 294 | debug_diagram(bts->bts, tbf->diag, "got CTL-AC UL-ASS"); |
Andreas Eversberg | 642c7d3 | 2012-07-23 17:58:55 +0200 | [diff] [blame] | 295 | if (tbf->direction == GPRS_RLCMAC_DL_TBF) |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 296 | tbf = bts->bts->tbf_by_tlli(tbf->tlli, |
Andreas Eversberg | 642c7d3 | 2012-07-23 17:58:55 +0200 | [diff] [blame] | 297 | GPRS_RLCMAC_UL_TBF); |
| 298 | if (!tbf) { |
| 299 | LOGP(DRLCMAC, LOGL_ERROR, "Got ACK, but UL " |
| 300 | "TBF is gone\n"); |
| 301 | break; |
| 302 | } |
| 303 | tbf_new_state(tbf, GPRS_RLCMAC_FLOW); |
Andreas Eversberg | 14db19e | 2012-08-06 15:03:03 +0200 | [diff] [blame] | 304 | if ((tbf->state_flags & |
| 305 | (1 << GPRS_RLCMAC_FLAG_TO_UL_ASS))) { |
| 306 | tbf->state_flags &= |
| 307 | ~(1 << GPRS_RLCMAC_FLAG_TO_UL_ASS); |
| 308 | LOGP(DRLCMAC, LOGL_NOTICE, "Recovered uplink " |
Andreas Eversberg | b83e2a7 | 2012-10-07 15:26:00 +0200 | [diff] [blame] | 309 | "assignment for UL TBF=%d\n", tbf->tfi); |
Andreas Eversberg | 14db19e | 2012-08-06 15:03:03 +0200 | [diff] [blame] | 310 | } |
Andreas Eversberg | 642c7d3 | 2012-07-23 17:58:55 +0200 | [diff] [blame] | 311 | tbf_assign_control_ts(tbf); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 312 | break; |
| 313 | } |
| 314 | LOGP(DRLCMAC, LOGL_ERROR, "Error: received PACET CONTROL ACK " |
| 315 | "at no request\n"); |
| 316 | break; |
| 317 | case MT_PACKET_DOWNLINK_ACK_NACK: |
| 318 | tfi = ul_control_block->u.Packet_Downlink_Ack_Nack.DOWNLINK_TFI; |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 319 | tbf = bts->bts->tbf_by_poll_fn(fn, trx, ts); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 320 | if (!tbf) { |
| 321 | LOGP(DRLCMAC, LOGL_NOTICE, "PACKET DOWNLINK ACK with " |
Andreas Eversberg | aafcd70 | 2012-10-07 15:33:31 +0200 | [diff] [blame] | 322 | "unknown FN=%u TFI=%d (TRX %d TS %d)\n", |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 323 | fn, tfi, trx, ts); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 324 | break; |
| 325 | } |
Andreas Eversberg | aafcd70 | 2012-10-07 15:33:31 +0200 | [diff] [blame] | 326 | if (tbf->tfi != tfi) { |
| 327 | LOGP(DRLCMAC, LOGL_NOTICE, "PACKET DOWNLINK ACK with " |
| 328 | "wrong TFI=%d, ignoring!\n", tfi); |
| 329 | break; |
| 330 | } |
Andreas Eversberg | 14db19e | 2012-08-06 15:03:03 +0200 | [diff] [blame] | 331 | tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_DL_ACK); |
| 332 | if ((tbf->state_flags & (1 << GPRS_RLCMAC_FLAG_TO_DL_ACK))) { |
| 333 | tbf->state_flags &= ~(1 << GPRS_RLCMAC_FLAG_TO_DL_ACK); |
Andreas Eversberg | aafcd70 | 2012-10-07 15:33:31 +0200 | [diff] [blame] | 334 | LOGP(DRLCMAC, LOGL_NOTICE, "Recovered downlink ack " |
| 335 | "for DL TBF=%d\n", tbf->tfi); |
Andreas Eversberg | 14db19e | 2012-08-06 15:03:03 +0200 | [diff] [blame] | 336 | } |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 337 | /* reset N3105 */ |
Andreas Eversberg | 802bb6e | 2012-08-06 11:15:05 +0200 | [diff] [blame] | 338 | tbf->n3105 = 0; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 339 | /* stop timer T3191 */ |
| 340 | tbf_timer_stop(tbf); |
| 341 | tlli = tbf->tlli; |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 342 | LOGP(DRLCMAC, LOGL_DEBUG, "RX: [PCU <- BTS] TFI: %u TLLI: 0x%08x Packet Downlink Ack/Nack\n", tbf->tfi, tbf->tlli); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 343 | tbf->poll_state = GPRS_RLCMAC_POLL_NONE; |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 344 | debug_diagram(bts->bts, tbf->diag, "got DL-ACK"); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 345 | |
Holger Hans Peter Freyther | 344ff48 | 2013-10-17 12:01:04 +0200 | [diff] [blame] | 346 | rc = gprs_rlcmac_downlink_ack(bts, tbf, |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 347 | ul_control_block->u.Packet_Downlink_Ack_Nack.Ack_Nack_Description.FINAL_ACK_INDICATION, |
| 348 | ul_control_block->u.Packet_Downlink_Ack_Nack.Ack_Nack_Description.STARTING_SEQUENCE_NUMBER, |
| 349 | ul_control_block->u.Packet_Downlink_Ack_Nack.Ack_Nack_Description.RECEIVED_BLOCK_BITMAP); |
Andreas Eversberg | 0f13c40 | 2012-07-16 11:59:23 +0200 | [diff] [blame] | 350 | if (rc == 1) { |
| 351 | tbf_free(tbf); |
| 352 | break; |
| 353 | } |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 354 | /* check for channel request */ |
| 355 | if (ul_control_block->u.Packet_Downlink_Ack_Nack.Exist_Channel_Request_Description) { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 356 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF in ack " |
| 357 | "message, so we provide one:\n"); |
Holger Hans Peter Freyther | 96efa70 | 2013-09-29 07:44:39 +0200 | [diff] [blame] | 358 | tbf_alloc_ul(bts, tbf->trx_no, tbf->ms_class, tbf->tlli, tbf->ta, tbf); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 359 | /* schedule uplink assignment */ |
| 360 | tbf->ul_ass_state = GPRS_RLCMAC_UL_ASS_SEND_ASS; |
| 361 | } |
| 362 | break; |
| 363 | case MT_PACKET_RESOURCE_REQUEST: |
| 364 | if (ul_control_block->u.Packet_Resource_Request.ID.UnionType) { |
| 365 | tlli = ul_control_block->u.Packet_Resource_Request.ID.u.TLLI; |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 366 | tbf = bts->bts->tbf_by_tlli(tlli, GPRS_RLCMAC_UL_TBF); |
Andreas Eversberg | 99a107d | 2012-09-27 09:21:52 +0200 | [diff] [blame] | 367 | if (tbf) { |
| 368 | LOGP(DRLCMACUL, LOGL_NOTICE, "Got RACH from " |
| 369 | "TLLI=0x%08x while UL TBF=%d still " |
| 370 | "exists. Killing pending DL TBF\n", |
| 371 | tlli, tbf->tfi); |
| 372 | tbf_free(tbf); |
| 373 | tbf = NULL; |
| 374 | } |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 375 | if (!tbf) { |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 376 | uint8_t ms_class = 0; |
Andreas Eversberg | 99a107d | 2012-09-27 09:21:52 +0200 | [diff] [blame] | 377 | struct gprs_rlcmac_tbf *dl_tbf; |
Andreas Eversberg | a004e6a | 2013-05-13 16:45:21 +0200 | [diff] [blame] | 378 | uint8_t ta; |
Andreas Eversberg | 99a107d | 2012-09-27 09:21:52 +0200 | [diff] [blame] | 379 | |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 380 | if ((dl_tbf = bts->bts->tbf_by_tlli(tlli, GPRS_RLCMAC_DL_TBF))) { |
Andreas Eversberg | 99a107d | 2012-09-27 09:21:52 +0200 | [diff] [blame] | 381 | LOGP(DRLCMACUL, LOGL_NOTICE, "Got RACH from " |
| 382 | "TLLI=0x%08x while DL TBF=%d still exists. " |
| 383 | "Killing pending DL TBF\n", tlli, |
| 384 | dl_tbf->tfi); |
| 385 | tbf_free(dl_tbf); |
| 386 | } |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 387 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF " |
| 388 | "in packet ressource request of single " |
| 389 | "block, so we provide one:\n"); |
Holger Hans Peter Freyther | cedf890 | 2013-10-19 20:47:12 +0200 | [diff] [blame] | 390 | sba = bts->bts->sba()->find(trx, ts, fn); |
Andreas Eversberg | a004e6a | 2013-05-13 16:45:21 +0200 | [diff] [blame] | 391 | if (!sba) { |
| 392 | LOGP(DRLCMAC, LOGL_NOTICE, "MS requests UL TBF " |
| 393 | "in packet ressource request of single " |
| 394 | "block, but there is no resource request " |
| 395 | "scheduled!\n"); |
Holger Hans Peter Freyther | 111614a | 2013-10-19 20:04:57 +0200 | [diff] [blame] | 396 | rc = bts->bts->timing_advance()->recall(tlli); |
Andreas Eversberg | a004e6a | 2013-05-13 16:45:21 +0200 | [diff] [blame] | 397 | if (rc >= 0) |
| 398 | ta = rc; |
| 399 | else |
| 400 | ta = 0; |
| 401 | } else { |
| 402 | ta = sba->ta; |
Holger Hans Peter Freyther | 111614a | 2013-10-19 20:04:57 +0200 | [diff] [blame] | 403 | bts->bts->timing_advance()->remember(tlli, ta); |
Andreas Eversberg | a004e6a | 2013-05-13 16:45:21 +0200 | [diff] [blame] | 404 | llist_del(&sba->list); |
| 405 | talloc_free(sba); |
| 406 | } |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 407 | if (ul_control_block->u.Packet_Resource_Request.Exist_MS_Radio_Access_capability) |
| 408 | ms_class = get_ms_class_by_capability(&ul_control_block->u.Packet_Resource_Request.MS_Radio_Access_capability); |
| 409 | if (!ms_class) |
| 410 | LOGP(DRLCMAC, LOGL_NOTICE, "MS does not give us a class.\n"); |
Holger Hans Peter Freyther | 8692128 | 2013-08-24 21:26:42 +0200 | [diff] [blame] | 411 | tbf = tbf_alloc_ul(bts, trx, ms_class, tlli, ta, NULL); |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 412 | if (!tbf) |
| 413 | break; |
| 414 | /* set control ts to current MS's TS, until assignment complete */ |
| 415 | LOGP(DRLCMAC, LOGL_DEBUG, "Change control TS to %d until assinment is complete.\n", ts); |
| 416 | tbf->control_ts = ts; |
| 417 | /* schedule uplink assignment */ |
| 418 | tbf->ul_ass_state = GPRS_RLCMAC_UL_ASS_SEND_ASS; |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 419 | debug_diagram(bts->bts, tbf->diag, "Res. REQ"); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 420 | break; |
| 421 | } |
| 422 | tfi = tbf->tfi; |
| 423 | } else { |
| 424 | if (ul_control_block->u.Packet_Resource_Request.ID.u.Global_TFI.UnionType) { |
| 425 | tfi = ul_control_block->u.Packet_Resource_Request.ID.u.Global_TFI.u.DOWNLINK_TFI; |
Holger Hans Peter Freyther | b67a8a3 | 2013-07-28 18:55:14 +0200 | [diff] [blame] | 426 | tbf = tbf_by_tfi(bts, tfi, trx, GPRS_RLCMAC_DL_TBF); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 427 | if (!tbf) { |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 428 | LOGP(DRLCMAC, LOGL_NOTICE, "PACKET RESSOURCE REQ unknown downlink TBF=%d\n", tlli); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 429 | break; |
| 430 | } |
| 431 | } else { |
| 432 | tfi = ul_control_block->u.Packet_Resource_Request.ID.u.Global_TFI.u.UPLINK_TFI; |
Holger Hans Peter Freyther | b67a8a3 | 2013-07-28 18:55:14 +0200 | [diff] [blame] | 433 | tbf = tbf_by_tfi(bts, tfi, trx, GPRS_RLCMAC_UL_TBF); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 434 | if (!tbf) { |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 435 | LOGP(DRLCMAC, LOGL_NOTICE, "PACKET RESSOURCE REQ unknown uplink TBF=%d\n", tlli); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 436 | break; |
| 437 | } |
| 438 | } |
| 439 | tlli = tbf->tlli; |
| 440 | } |
Andreas Eversberg | c8466f4 | 2012-07-15 19:34:53 +0200 | [diff] [blame] | 441 | LOGP(DRLCMAC, LOGL_ERROR, "RX: [PCU <- BTS] %s TFI: %u TLLI: 0x%08x FIXME: Packet ressource request\n", (tbf->direction == GPRS_RLCMAC_UL_TBF) ? "UL" : "DL", tbf->tfi, tbf->tlli); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 442 | break; |
Andreas Eversberg | 050ace2 | 2013-03-16 16:22:02 +0100 | [diff] [blame] | 443 | case MT_PACKET_MEASUREMENT_REPORT: |
Holger Hans Peter Freyther | cedf890 | 2013-10-19 20:47:12 +0200 | [diff] [blame] | 444 | sba = bts->bts->sba()->find(trx, ts, fn); |
Andreas Eversberg | a004e6a | 2013-05-13 16:45:21 +0200 | [diff] [blame] | 445 | if (!sba) { |
| 446 | LOGP(DRLCMAC, LOGL_NOTICE, "MS send measurement " |
| 447 | "in packet ressource request of single " |
| 448 | "block, but there is no resource request " |
| 449 | "scheduled!\n"); |
| 450 | } else { |
Holger Hans Peter Freyther | 111614a | 2013-10-19 20:04:57 +0200 | [diff] [blame] | 451 | bts->bts->timing_advance()->remember(ul_control_block->u.Packet_Measurement_Report.TLLI, sba->ta); |
Andreas Eversberg | a004e6a | 2013-05-13 16:45:21 +0200 | [diff] [blame] | 452 | llist_del(&sba->list); |
| 453 | talloc_free(sba); |
| 454 | } |
Andreas Eversberg | 050ace2 | 2013-03-16 16:22:02 +0100 | [diff] [blame] | 455 | gprs_rlcmac_meas_rep(&ul_control_block->u.Packet_Measurement_Report); |
| 456 | break; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 457 | default: |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 458 | LOGP(DRLCMAC, LOGL_NOTICE, "RX: [PCU <- BTS] unknown control block received\n"); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 459 | } |
Andreas Eversberg | 6681bb8 | 2012-07-25 08:48:44 +0200 | [diff] [blame] | 460 | talloc_free(ul_control_block); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 461 | return 1; |
| 462 | } |
| 463 | |
Andreas Eversberg | e13fa2d | 2012-07-09 17:10:44 +0200 | [diff] [blame] | 464 | #ifdef DEBUG_DL_ASS_IDLE |
| 465 | char debug_imsi[16]; |
| 466 | #endif |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 467 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 468 | /* |
| 469 | * UL data block flow |
| 470 | */ |
| 471 | |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 472 | /* get TLLI from received UL data block */ |
| 473 | static int tlli_from_ul_data(uint8_t *data, uint8_t len, uint32_t *tlli) |
| 474 | { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 475 | struct rlc_ul_header *rh = (struct rlc_ul_header *)data; |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 476 | struct rlc_li_field *li; |
| 477 | uint8_t e; |
Andreas Eversberg | 106ea79 | 2012-11-04 12:55:16 +0100 | [diff] [blame] | 478 | uint32_t _tlli; |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 479 | |
| 480 | if (!rh->ti) |
| 481 | return -EINVAL; |
| 482 | |
| 483 | data += 3; |
| 484 | len -= 3; |
| 485 | e = rh->e; |
| 486 | /* if E is not set (LI follows) */ |
| 487 | while (!e) { |
| 488 | if (!len) { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 489 | LOGP(DRLCMACUL, LOGL_NOTICE, "UL DATA LI extended, " |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 490 | "but no more data\n"); |
| 491 | return -EINVAL; |
| 492 | } |
| 493 | /* get new E */ |
| 494 | li = (struct rlc_li_field *)data; |
| 495 | if (li->e == 0) /* if LI==0, E is interpreted as '1' */ |
| 496 | e = 1; |
| 497 | else |
| 498 | e = li->e; |
| 499 | data++; |
| 500 | len--; |
| 501 | } |
| 502 | if (len < 4) { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 503 | LOGP(DRLCMACUL, LOGL_NOTICE, "UL DATA TLLI out of frame " |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 504 | "border\n"); |
| 505 | return -EINVAL; |
| 506 | } |
Andreas Eversberg | 106ea79 | 2012-11-04 12:55:16 +0100 | [diff] [blame] | 507 | memcpy(&_tlli, data, 4); |
| 508 | *tlli = ntohl(_tlli); |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 509 | |
| 510 | return 0; |
| 511 | } |
| 512 | |
| 513 | /* Store received block data in LLC message(s) and forward to SGSN if complete. |
| 514 | */ |
| 515 | static int gprs_rlcmac_assemble_llc(struct gprs_rlcmac_tbf *tbf, uint8_t *data, |
| 516 | uint8_t len) |
| 517 | { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 518 | struct rlc_ul_header *rh = (struct rlc_ul_header *)data; |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 519 | uint8_t e, m; |
| 520 | struct rlc_li_field *li; |
| 521 | uint8_t frame_offset[16], offset = 0, chunk; |
| 522 | int i, frames = 0; |
| 523 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 524 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Assembling frames: (len=%d)\n", len); |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 525 | |
| 526 | data += 3; |
| 527 | len -= 3; |
| 528 | e = rh->e; /* if extended */ |
| 529 | m = 1; /* more frames, that means: the first frame */ |
| 530 | |
| 531 | /* Parse frame offsets from length indicator(s), if any. */ |
| 532 | while (1) { |
| 533 | if (frames == (int)sizeof(frame_offset)) { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 534 | LOGP(DRLCMACUL, LOGL_ERROR, "Too many frames in " |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 535 | "block\n"); |
| 536 | return -EINVAL; |
| 537 | } |
| 538 | frame_offset[frames++] = offset; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 539 | LOGP(DRLCMACUL, LOGL_DEBUG, "-- Frame %d starts at offset " |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 540 | "%d\n", frames, offset); |
| 541 | if (!len) |
| 542 | break; |
| 543 | /* M == 0 and E == 0 is not allowed in this version. */ |
| 544 | if (!m && !e) { |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 545 | LOGP(DRLCMACUL, LOGL_NOTICE, "UL DATA TBF=%d " |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 546 | "ignored, because M='0' and E='0'.\n", |
| 547 | tbf->tfi); |
| 548 | return 0; |
| 549 | } |
| 550 | /* no more frames in this segment */ |
| 551 | if (e) { |
| 552 | break; |
| 553 | } |
| 554 | /* There is a new frame and an LI that delimits it. */ |
| 555 | if (m) { |
| 556 | li = (struct rlc_li_field *)data; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 557 | LOGP(DRLCMACUL, LOGL_DEBUG, "-- Delimiter len=%d\n", |
| 558 | li->li); |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 559 | /* Special case: LI == 0 |
| 560 | * If the last segment would fit precisely into the |
| 561 | * rest of the RLC MAC block, there would be no way |
| 562 | * to delimit that this segment ends and is not |
| 563 | * continued in the next block. |
| 564 | * The special LI (0) is used to force the segment to |
| 565 | * extend into the next block, so it is delimited there. |
| 566 | * This LI must be skipped. Also it is the last LI. |
| 567 | */ |
| 568 | if (li->li == 0) { |
| 569 | data++; |
| 570 | len--; |
| 571 | m = 1; /* M is ignored, we know there is more */ |
| 572 | break; /* handle E as '1', so we break! */ |
| 573 | } |
| 574 | e = li->e; |
| 575 | m = li->m; |
| 576 | offset += li->li; |
| 577 | data++; |
| 578 | len--; |
| 579 | continue; |
| 580 | } |
| 581 | } |
| 582 | if (!m) { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 583 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Last frame carries spare " |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 584 | "data\n"); |
| 585 | } |
| 586 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 587 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Data length after length fields: %d\n", |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 588 | len); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 589 | /* TLLI */ |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 590 | if (rh->ti) { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 591 | if (len < 4) { |
| 592 | LOGP(DRLCMACUL, LOGL_NOTICE, "UL DATA TLLI out of " |
| 593 | "frame border\n"); |
| 594 | return -EINVAL; |
| 595 | } |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 596 | data += 4; |
| 597 | len -= 4; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 598 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Length after skipping TLLI: " |
| 599 | "%d\n", len); |
| 600 | } |
| 601 | |
| 602 | /* PFI */ |
| 603 | if (rh->pi) { |
| 604 | LOGP(DRLCMACUL, LOGL_ERROR, "ERROR: PFI not supported, " |
| 605 | "please disable in SYSTEM INFORMATION\n"); |
| 606 | if (len < 1) { |
| 607 | LOGP(DRLCMACUL, LOGL_NOTICE, "UL DATA PFI out of " |
| 608 | "frame border\n"); |
| 609 | return -EINVAL; |
| 610 | } |
| 611 | data++; |
| 612 | len--; |
| 613 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Length after skipping PFI: " |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 614 | "%d\n", len); |
| 615 | } |
| 616 | |
| 617 | /* Now we have: |
| 618 | * - a list of frames offsets: frame_offset[] |
| 619 | * - number of frames: i |
| 620 | * - m == 0: Last frame carries spare data (end of TBF). |
| 621 | */ |
| 622 | |
| 623 | /* Check if last offset would exceed frame. */ |
| 624 | if (offset > len) { |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 625 | LOGP(DRLCMACUL, LOGL_NOTICE, "UL DATA TBF=%d ignored, " |
| 626 | "because LI delimits data that exceeds block size.\n", |
| 627 | tbf->tfi); |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 628 | return -EINVAL; |
| 629 | } |
| 630 | |
| 631 | /* create LLC frames */ |
| 632 | for (i = 0; i < frames; i++) { |
| 633 | /* last frame ? */ |
| 634 | if (i == frames - 1) { |
| 635 | /* no more data in last frame */ |
| 636 | if (!m) |
| 637 | break; |
| 638 | /* data until end of frame */ |
| 639 | chunk = len - frame_offset[i]; |
| 640 | } else { |
| 641 | /* data until next frame */ |
| 642 | chunk = frame_offset[i + 1] - frame_offset[i]; |
| 643 | } |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 644 | LOGP(DRLCMACUL, LOGL_DEBUG, "-- Appending chunk (len=%d) to " |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 645 | "frame at %d.\n", chunk, tbf->llc_index); |
| 646 | if (tbf->llc_index + chunk > LLC_MAX_LEN) { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 647 | LOGP(DRLCMACUL, LOGL_NOTICE, "LLC frame exceeds " |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 648 | "maximum size.\n"); |
| 649 | chunk = LLC_MAX_LEN - tbf->llc_index; |
| 650 | } |
| 651 | memcpy(tbf->llc_frame + tbf->llc_index, data + frame_offset[i], |
| 652 | chunk); |
| 653 | tbf->llc_index += chunk; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 654 | /* not last frame. */ |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 655 | if (i != frames - 1) { |
| 656 | /* send frame to SGSN */ |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 657 | LOGP(DRLCMACUL, LOGL_INFO, "Complete UL frame for " |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 658 | "TBF=%d: len=%d\n", tbf->tfi, tbf->llc_index); |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 659 | gprs_rlcmac_tx_ul_ud(tbf); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 660 | tbf->llc_index = 0; /* reset frame space */ |
| 661 | /* also check if CV==0, because the frame may fill up the |
| 662 | * block precisely, then it is also complete. normally the |
| 663 | * frame would be extended into the next block with a 0-length |
| 664 | * delimiter added to this block. */ |
| 665 | } else if (rh->cv == 0) { |
| 666 | /* send frame to SGSN */ |
| 667 | LOGP(DRLCMACUL, LOGL_INFO, "Complete UL frame for " |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 668 | "TBF=%d that fits precisely in last block: " |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 669 | "len=%d\n", tbf->tfi, tbf->llc_index); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 670 | gprs_rlcmac_tx_ul_ud(tbf); |
| 671 | tbf->llc_index = 0; /* reset frame space */ |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 672 | } |
| 673 | } |
| 674 | |
| 675 | return 0; |
| 676 | } |
| 677 | |
Holger Hans Peter Freyther | ae947fc | 2013-10-17 13:29:03 +0200 | [diff] [blame] | 678 | struct msgb *gprs_rlcmac_send_uplink_ack(struct gprs_rlcmac_bts *bts, |
| 679 | struct gprs_rlcmac_tbf *tbf, |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 680 | uint32_t fn) |
| 681 | { |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 682 | int final = (tbf->state_is(GPRS_RLCMAC_FINISHED)); |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 683 | struct msgb *msg; |
| 684 | |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 685 | if (final) { |
| 686 | if (tbf->poll_state != GPRS_RLCMAC_POLL_NONE) { |
| 687 | LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already " |
| 688 | "sheduled for TBF=%d, so we must wait for " |
| 689 | "final uplink ack...\n", tbf->tfi); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 690 | return NULL; |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 691 | } |
Holger Hans Peter Freyther | cedf890 | 2013-10-19 20:47:12 +0200 | [diff] [blame] | 692 | if (bts->bts->sba()->find(tbf->trx_no, tbf->control_ts, (fn + 13) % 2715648)) { |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 693 | LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already " |
| 694 | "scheduled for single block allocation...\n"); |
| 695 | return NULL; |
| 696 | } |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 697 | } |
| 698 | |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 699 | msg = msgb_alloc(23, "rlcmac_ul_ack"); |
| 700 | if (!msg) |
| 701 | return NULL; |
| 702 | bitvec *ack_vec = bitvec_alloc(23); |
| 703 | if (!ack_vec) { |
| 704 | msgb_free(msg); |
| 705 | return NULL; |
| 706 | } |
| 707 | bitvec_unhex(ack_vec, |
| 708 | "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
Andreas Eversberg | 6681bb8 | 2012-07-25 08:48:44 +0200 | [diff] [blame] | 709 | 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] | 710 | Encoding::write_packet_uplink_ack(bts, mac_control_block, tbf, final); |
Ivan Kluchnikov | ef7f28c | 2012-07-12 14:49:15 +0400 | [diff] [blame] | 711 | encode_gsm_rlcmac_downlink(ack_vec, mac_control_block); |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 712 | bitvec_pack(ack_vec, msgb_put(msg, 23)); |
| 713 | bitvec_free(ack_vec); |
Andreas Eversberg | 6681bb8 | 2012-07-25 08:48:44 +0200 | [diff] [blame] | 714 | talloc_free(mac_control_block); |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 715 | |
Andreas Eversberg | ee31b78 | 2012-07-15 16:27:01 +0200 | [diff] [blame] | 716 | /* now we must set this flag, so we are allowed to assign downlink |
| 717 | * TBF on PACCH. it is only allowed when TLLI is aknowledged. */ |
Andreas Eversberg | 08e93cd | 2012-07-26 08:13:06 +0200 | [diff] [blame] | 718 | tbf->dir.ul.contention_resolution_done = 1; |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 719 | |
| 720 | if (final) { |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 721 | tbf->poll_state = GPRS_RLCMAC_POLL_SCHED; |
| 722 | tbf->poll_fn = (fn + 13) % 2715648; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 723 | /* waiting for final acknowledge */ |
| 724 | tbf->ul_ack_state = GPRS_RLCMAC_UL_ACK_WAIT_ACK; |
Andreas Eversberg | 08e93cd | 2012-07-26 08:13:06 +0200 | [diff] [blame] | 725 | tbf->dir.ul.final_ack_sent = 1; |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 726 | } else |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 727 | tbf->ul_ack_state = GPRS_RLCMAC_UL_ACK_NONE; |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 728 | debug_diagram(bts->bts, tbf->diag, "send UL-ACK"); |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 729 | |
| 730 | return msg; |
| 731 | } |
| 732 | |
| 733 | /* receive UL data block |
| 734 | * |
| 735 | * The blocks are defragmented and forwarded as LLC frames, if complete. |
| 736 | */ |
Holger Hans Peter Freyther | 698b612 | 2013-10-17 13:44:18 +0200 | [diff] [blame] | 737 | int gprs_rlcmac_rcv_data_block_acknowledged(struct gprs_rlcmac_bts *bts, |
| 738 | uint8_t trx, uint8_t ts, |
Andreas Eversberg | 570b44b | 2013-03-16 16:15:01 +0100 | [diff] [blame] | 739 | uint8_t *data, uint8_t len, int8_t rssi) |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 740 | { |
| 741 | struct gprs_rlcmac_tbf *tbf; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 742 | struct rlc_ul_header *rh = (struct rlc_ul_header *)data; |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 743 | uint16_t mod_sns, mod_sns_half, offset_v_q, offset_v_r, index; |
| 744 | int rc; |
| 745 | |
Andreas Eversberg | dfa563c | 2012-07-06 08:13:59 +0200 | [diff] [blame] | 746 | switch (len) { |
| 747 | case 54: |
| 748 | /* omitting spare bits */ |
| 749 | len = 53; |
| 750 | break; |
| 751 | case 40: |
| 752 | /* omitting spare bits */ |
| 753 | len = 39; |
| 754 | break; |
| 755 | case 34: |
| 756 | /* omitting spare bits */ |
| 757 | len = 33; |
| 758 | break; |
| 759 | case 23: |
| 760 | break; |
| 761 | default: |
| 762 | LOGP(DRLCMACUL, LOGL_ERROR, "Dropping data block with invalid" |
| 763 | "length: %d)\n", len); |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 764 | return -EINVAL; |
| 765 | } |
| 766 | |
| 767 | /* find TBF inst from given TFI */ |
Holger Hans Peter Freyther | b67a8a3 | 2013-07-28 18:55:14 +0200 | [diff] [blame] | 768 | tbf = tbf_by_tfi(bts, rh->tfi, trx, GPRS_RLCMAC_UL_TBF); |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 769 | if (!tbf) { |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 770 | LOGP(DRLCMACUL, LOGL_NOTICE, "UL DATA unknown TBF=%d\n", |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 771 | rh->tfi); |
| 772 | return 0; |
| 773 | } |
Andreas Eversberg | 14db19e | 2012-08-06 15:03:03 +0200 | [diff] [blame] | 774 | tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_UL_DATA); |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 775 | |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 776 | LOGP(DRLCMACUL, LOGL_DEBUG, "UL DATA TBF=%d received (V(Q)=%d .. " |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 777 | "V(R)=%d)\n", rh->tfi, tbf->dir.ul.v_q, tbf->dir.ul.v_r); |
| 778 | |
Andreas Eversberg | 050ace2 | 2013-03-16 16:22:02 +0100 | [diff] [blame] | 779 | /* process RSSI */ |
| 780 | gprs_rlcmac_rssi(tbf, rssi); |
| 781 | |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 782 | /* get TLLI */ |
| 783 | if (!tbf->tlli_valid) { |
Andreas Eversberg | 3a7eb6b | 2012-10-07 15:55:25 +0200 | [diff] [blame] | 784 | struct gprs_rlcmac_tbf *dl_tbf, *ul_tbf; |
Andreas Eversberg | bc65586 | 2012-07-23 18:13:31 +0200 | [diff] [blame] | 785 | |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 786 | /* no TLLI yet */ |
| 787 | if (!rh->ti) { |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 788 | LOGP(DRLCMACUL, LOGL_NOTICE, "UL DATA TBF=%d without " |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 789 | "TLLI, but no TLLI received yet\n", rh->tfi); |
| 790 | return 0; |
| 791 | } |
| 792 | rc = tlli_from_ul_data(data, len, &tbf->tlli); |
| 793 | if (rc) { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 794 | LOGP(DRLCMACUL, LOGL_NOTICE, "Failed to decode TLLI " |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 795 | "of UL DATA TBF=%d.\n", rh->tfi); |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 796 | return 0; |
| 797 | } |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 798 | LOGP(DRLCMACUL, LOGL_INFO, "Decoded premier TLLI=0x%08x of " |
| 799 | "UL DATA TBF=%d.\n", tbf->tlli, rh->tfi); |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 800 | if ((dl_tbf = bts->bts->tbf_by_tlli(tbf->tlli, GPRS_RLCMAC_DL_TBF))) { |
Andreas Eversberg | bc65586 | 2012-07-23 18:13:31 +0200 | [diff] [blame] | 801 | LOGP(DRLCMACUL, LOGL_NOTICE, "Got RACH from " |
| 802 | "TLLI=0x%08x while DL TBF=%d still exists. " |
| 803 | "Killing pending DL TBF\n", tbf->tlli, |
| 804 | dl_tbf->tfi); |
| 805 | tbf_free(dl_tbf); |
| 806 | } |
Andreas Eversberg | 3a7eb6b | 2012-10-07 15:55:25 +0200 | [diff] [blame] | 807 | /* tbf_by_tlli will not find your TLLI, because it is not |
| 808 | * yet marked valid */ |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 809 | if ((ul_tbf = bts->bts->tbf_by_tlli(tbf->tlli, GPRS_RLCMAC_UL_TBF))) { |
Andreas Eversberg | 3a7eb6b | 2012-10-07 15:55:25 +0200 | [diff] [blame] | 810 | LOGP(DRLCMACUL, LOGL_NOTICE, "Got RACH from " |
| 811 | "TLLI=0x%08x while UL TBF=%d still exists. " |
| 812 | "Killing pending UL TBF\n", tbf->tlli, |
| 813 | ul_tbf->tfi); |
| 814 | tbf_free(ul_tbf); |
| 815 | } |
| 816 | /* mark TLLI valid now */ |
| 817 | tbf->tlli_valid = 1; |
Andreas Eversberg | a004e6a | 2013-05-13 16:45:21 +0200 | [diff] [blame] | 818 | /* store current timing advance */ |
Holger Hans Peter Freyther | 111614a | 2013-10-19 20:04:57 +0200 | [diff] [blame] | 819 | bts->bts->timing_advance()->remember(tbf->tlli, tbf->ta); |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 820 | /* already have TLLI, but we stille get another one */ |
| 821 | } else if (rh->ti) { |
| 822 | uint32_t tlli; |
| 823 | rc = tlli_from_ul_data(data, len, &tlli); |
| 824 | if (rc) { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 825 | LOGP(DRLCMACUL, LOGL_NOTICE, "Failed to decode TLLI " |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 826 | "of UL DATA TBF=%d.\n", rh->tfi); |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 827 | return 0; |
| 828 | } |
| 829 | if (tlli != tbf->tlli) { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 830 | LOGP(DRLCMACUL, LOGL_NOTICE, "TLLI mismatch on UL " |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 831 | "DATA TBF=%d. (Ignoring due to contention " |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 832 | "resolution)\n", rh->tfi); |
| 833 | return 0; |
| 834 | } |
| 835 | } |
| 836 | |
| 837 | mod_sns = tbf->sns - 1; |
| 838 | mod_sns_half = (tbf->sns >> 1) - 1; |
| 839 | |
| 840 | /* restart T3169 */ |
Andreas Eversberg | dfa563c | 2012-07-06 08:13:59 +0200 | [diff] [blame] | 841 | tbf_timer_start(tbf, 3169, bts->t3169, 0); |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 842 | |
| 843 | /* Increment RX-counter */ |
| 844 | tbf->dir.ul.rx_counter++; |
| 845 | |
| 846 | /* current block relative to lowest unreceived block */ |
| 847 | offset_v_q = (rh->bsn - tbf->dir.ul.v_q) & mod_sns; |
| 848 | /* If out of window (may happen if blocks below V(Q) are received |
| 849 | * again. */ |
| 850 | if (offset_v_q >= tbf->ws) { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 851 | LOGP(DRLCMACUL, LOGL_DEBUG, "- BSN %d out of window " |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 852 | "%d..%d (it's normal)\n", rh->bsn, tbf->dir.ul.v_q, |
| 853 | (tbf->dir.ul.v_q + tbf->ws - 1) & mod_sns); |
| 854 | return 0; |
| 855 | } |
| 856 | /* Write block to buffer and set receive state array. */ |
| 857 | index = rh->bsn & mod_sns_half; /* memory index of block */ |
| 858 | memcpy(tbf->rlc_block[index], data, len); /* Copy block. */ |
| 859 | tbf->rlc_block_len[index] = len; |
| 860 | tbf->dir.ul.v_n[index] = 'R'; /* Mark received block. */ |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 861 | LOGP(DRLCMACUL, LOGL_DEBUG, "- BSN %d storing in window (%d..%d)\n", |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 862 | rh->bsn, tbf->dir.ul.v_q, |
| 863 | (tbf->dir.ul.v_q + tbf->ws - 1) & mod_sns); |
| 864 | /* Raise V(R) to highest received sequence number not received. */ |
| 865 | offset_v_r = (rh->bsn + 1 - tbf->dir.ul.v_r) & mod_sns; |
| 866 | if (offset_v_r < (tbf->sns >> 1)) { /* Positive offset, so raise. */ |
| 867 | while (offset_v_r--) { |
| 868 | if (offset_v_r) /* all except the received block */ |
| 869 | tbf->dir.ul.v_n[tbf->dir.ul.v_r & mod_sns_half] |
| 870 | = 'N'; /* Mark block as not received */ |
| 871 | tbf->dir.ul.v_r = (tbf->dir.ul.v_r + 1) & mod_sns; |
| 872 | /* Inc V(R). */ |
| 873 | } |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 874 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Raising V(R) to %d\n", |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 875 | tbf->dir.ul.v_r); |
| 876 | } |
| 877 | |
| 878 | /* Raise V(Q) if possible, and retrieve LLC frames from blocks. |
| 879 | * This is looped until there is a gap (non received block) or |
| 880 | * the window is empty.*/ |
| 881 | while (tbf->dir.ul.v_q != tbf->dir.ul.v_r && tbf->dir.ul.v_n[ |
| 882 | (index = tbf->dir.ul.v_q & mod_sns_half)] == 'R') { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 883 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Taking block %d out, raising " |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 884 | "V(Q) to %d\n", tbf->dir.ul.v_q, |
| 885 | (tbf->dir.ul.v_q + 1) & mod_sns); |
| 886 | /* get LLC data from block */ |
| 887 | gprs_rlcmac_assemble_llc(tbf, tbf->rlc_block[index], |
| 888 | tbf->rlc_block_len[index]); |
| 889 | /* raise V(Q), because block already received */ |
| 890 | tbf->dir.ul.v_q = (tbf->dir.ul.v_q + 1) & mod_sns; |
| 891 | } |
| 892 | |
| 893 | /* Check CV of last frame in buffer */ |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 894 | if (tbf->state_is(GPRS_RLCMAC_FLOW) /* still in flow state */ |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 895 | && tbf->dir.ul.v_q == tbf->dir.ul.v_r) { /* if complete */ |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 896 | struct rlc_ul_header *last_rh = (struct rlc_ul_header *) |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 897 | tbf->rlc_block[(tbf->dir.ul.v_r - 1) & mod_sns_half]; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 898 | LOGP(DRLCMACUL, LOGL_DEBUG, "- No gaps in received block, " |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 899 | "last block: BSN=%d CV=%d\n", last_rh->bsn, |
| 900 | last_rh->cv); |
| 901 | if (last_rh->cv == 0) { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 902 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Finished with UL " |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 903 | "TBF\n"); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 904 | tbf_new_state(tbf, GPRS_RLCMAC_FINISHED); |
| 905 | /* Reset N3103 counter. */ |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 906 | tbf->dir.ul.n3103 = 0; |
| 907 | } |
| 908 | } |
| 909 | |
| 910 | /* If TLLI is included or if we received half of the window, we send |
| 911 | * an ack/nack */ |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 912 | if (rh->si || rh->ti || tbf->state_is(GPRS_RLCMAC_FINISHED) |
Andreas Eversberg | f54a89e | 2012-07-16 11:56:11 +0200 | [diff] [blame] | 913 | || (tbf->dir.ul.rx_counter % SEND_ACK_AFTER_FRAMES) == 0) { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 914 | if (rh->si) { |
Andreas Eversberg | f54a89e | 2012-07-16 11:56:11 +0200 | [diff] [blame] | 915 | LOGP(DRLCMACUL, LOGL_NOTICE, "- Scheduling Ack/Nack, " |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 916 | "because MS is stalled.\n"); |
| 917 | } |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 918 | if (rh->ti) { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 919 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Scheduling Ack/Nack, " |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 920 | "because TLLI is included.\n"); |
| 921 | } |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 922 | if (tbf->state_is(GPRS_RLCMAC_FINISHED)) { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 923 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Scheduling Ack/Nack, " |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 924 | "because last block has CV==0.\n"); |
| 925 | } |
Andreas Eversberg | f54a89e | 2012-07-16 11:56:11 +0200 | [diff] [blame] | 926 | if ((tbf->dir.ul.rx_counter % SEND_ACK_AFTER_FRAMES) == 0) { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 927 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Scheduling Ack/Nack, " |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 928 | "because %d frames received.\n", |
Andreas Eversberg | f54a89e | 2012-07-16 11:56:11 +0200 | [diff] [blame] | 929 | SEND_ACK_AFTER_FRAMES); |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 930 | } |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 931 | if (tbf->ul_ack_state == GPRS_RLCMAC_UL_ACK_NONE) { |
Andreas Eversberg | b83e2a7 | 2012-10-07 15:26:00 +0200 | [diff] [blame] | 932 | #ifdef DEBUG_DIAGRAM |
| 933 | if (rh->si) |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 934 | debug_diagram(bts->bts, tbf->diag, "sched UL-ACK stall"); |
Andreas Eversberg | b83e2a7 | 2012-10-07 15:26:00 +0200 | [diff] [blame] | 935 | if (rh->ti) |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 936 | debug_diagram(bts->bts, tbf->diag, "sched UL-ACK TLLI"); |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 937 | if (tbf->state_is(GPRS_RLCMAC_FINISHED)) |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 938 | debug_diagram(bts->bts, tbf->diag, "sched UL-ACK CV==0"); |
Andreas Eversberg | b83e2a7 | 2012-10-07 15:26:00 +0200 | [diff] [blame] | 939 | if ((tbf->dir.ul.rx_counter % SEND_ACK_AFTER_FRAMES) == 0) |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 940 | debug_diagram(bts->bts, tbf->diag, "sched UL-ACK n=%d", |
Andreas Eversberg | b83e2a7 | 2012-10-07 15:26:00 +0200 | [diff] [blame] | 941 | tbf->dir.ul.rx_counter); |
| 942 | #endif |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 943 | /* trigger sending at next RTS */ |
| 944 | tbf->ul_ack_state = GPRS_RLCMAC_UL_ACK_SEND_ACK; |
| 945 | } else { |
| 946 | /* already triggered */ |
| 947 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Sending Ack/Nack is " |
| 948 | "already triggered, don't schedule!\n"); |
| 949 | } |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 950 | } |
| 951 | |
| 952 | return 0; |
| 953 | } |
| 954 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 955 | struct msgb *gprs_rlcmac_send_packet_uplink_assignment( |
Holger Hans Peter Freyther | d507ce6 | 2013-10-17 15:32:37 +0200 | [diff] [blame] | 956 | struct gprs_rlcmac_bts *bts, |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 957 | struct gprs_rlcmac_tbf *tbf, uint32_t fn) |
| 958 | { |
| 959 | struct msgb *msg; |
| 960 | struct gprs_rlcmac_tbf *new_tbf; |
| 961 | |
Andreas Eversberg | 802bb6e | 2012-08-06 11:15:05 +0200 | [diff] [blame] | 962 | #if POLLING_ASSIGNMENT_UL == 1 |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 963 | if (tbf->poll_state != GPRS_RLCMAC_POLL_NONE) { |
| 964 | LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already " |
| 965 | "sheduled for TBF=%d, so we must wait for uplink " |
| 966 | "assignment...\n", tbf->tfi); |
| 967 | return NULL; |
| 968 | } |
Holger Hans Peter Freyther | cedf890 | 2013-10-19 20:47:12 +0200 | [diff] [blame] | 969 | if (bts->bts->sba()->find(tbf->trx_no, tbf->control_ts, (fn + 13) % 2715648)) { |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 970 | LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already scheduled for " |
| 971 | "single block allocation...\n"); |
| 972 | return NULL; |
| 973 | } |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 974 | #endif |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 975 | |
| 976 | /* on down TBF we get the uplink TBF to be assigned. */ |
| 977 | if (tbf->direction == GPRS_RLCMAC_DL_TBF) |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 978 | new_tbf = bts->bts->tbf_by_tlli(tbf->tlli, GPRS_RLCMAC_UL_TBF); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 979 | else |
| 980 | new_tbf = tbf; |
| 981 | |
| 982 | if (!new_tbf) { |
| 983 | LOGP(DRLCMACUL, LOGL_ERROR, "We have a schedule for uplink " |
| 984 | "assignment at downlink TBF=%d, but there is no uplink " |
| 985 | "TBF\n", tbf->tfi); |
| 986 | tbf->ul_ass_state = GPRS_RLCMAC_UL_ASS_NONE; |
| 987 | return NULL; |
| 988 | } |
| 989 | |
| 990 | msg = msgb_alloc(23, "rlcmac_ul_ass"); |
| 991 | if (!msg) |
| 992 | return NULL; |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 993 | 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] | 994 | bitvec *ass_vec = bitvec_alloc(23); |
| 995 | if (!ass_vec) { |
| 996 | msgb_free(msg); |
| 997 | return NULL; |
| 998 | } |
| 999 | bitvec_unhex(ass_vec, |
| 1000 | "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
Holger Hans Peter Freyther | 63f29d6 | 2013-10-19 19:04:03 +0200 | [diff] [blame] | 1001 | Encoding::write_packet_uplink_assignment(bts, ass_vec, tbf->tfi, |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 1002 | (tbf->direction == GPRS_RLCMAC_DL_TBF), tbf->tlli, |
Andreas Eversberg | aafcbbb | 2012-09-27 09:20:45 +0200 | [diff] [blame] | 1003 | tbf->tlli_valid, new_tbf, POLLING_ASSIGNMENT_UL, bts->alpha, |
Andreas Eversberg | afdd9e1 | 2012-10-07 17:08:55 +0200 | [diff] [blame] | 1004 | bts->gamma, -1); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1005 | bitvec_pack(ass_vec, msgb_put(msg, 23)); |
Andreas Eversberg | 6681bb8 | 2012-07-25 08:48:44 +0200 | [diff] [blame] | 1006 | 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] | 1007 | LOGP(DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ TX : Packet Uplink Assignment +++++++++++++++++++++++++\n"); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1008 | decode_gsm_rlcmac_downlink(ass_vec, mac_control_block); |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 1009 | LOGPC(DCSN1, LOGL_NOTICE, "\n"); |
| 1010 | LOGP(DRLCMAC, LOGL_DEBUG, "------------------------- TX : Packet Uplink Assignment -------------------------\n"); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1011 | bitvec_free(ass_vec); |
Andreas Eversberg | 6681bb8 | 2012-07-25 08:48:44 +0200 | [diff] [blame] | 1012 | talloc_free(mac_control_block); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1013 | |
Andreas Eversberg | 802bb6e | 2012-08-06 11:15:05 +0200 | [diff] [blame] | 1014 | #if POLLING_ASSIGNMENT_UL == 1 |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1015 | tbf->poll_state = GPRS_RLCMAC_POLL_SCHED; |
| 1016 | tbf->poll_fn = (fn + 13) % 2715648; |
| 1017 | tbf->ul_ass_state = GPRS_RLCMAC_UL_ASS_WAIT_ACK; |
| 1018 | #else |
| 1019 | tbf->ul_ass_state = GPRS_RLCMAC_UL_ASS_NONE; |
Andreas Eversberg | 642c7d3 | 2012-07-23 17:58:55 +0200 | [diff] [blame] | 1020 | tbf_new_state(new_tbf, GPRS_RLCMAC_FLOW); |
| 1021 | tbf_assign_control_ts(new_tbf); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1022 | #endif |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 1023 | debug_diagram(bts->bts, tbf->diag, "send UL-ASS"); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1024 | |
| 1025 | return msg; |
| 1026 | } |
| 1027 | |
Holger Hans Peter Freyther | b0250eb | 2013-10-17 13:46:19 +0200 | [diff] [blame] | 1028 | int gprs_rlcmac_rcv_rach(struct gprs_rlcmac_bts *bts, |
| 1029 | uint8_t ra, uint32_t Fn, int16_t qta) |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1030 | { |
| 1031 | struct gprs_rlcmac_tbf *tbf; |
Andreas Eversberg | 02d7cd2 | 2013-01-15 08:59:34 +0100 | [diff] [blame] | 1032 | uint8_t trx, ts = 0; |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 1033 | int8_t tfi; /* must be signed */ |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 1034 | uint8_t sb = 0; |
| 1035 | uint32_t sb_fn = 0; |
| 1036 | int rc; |
| 1037 | uint8_t plen; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1038 | |
| 1039 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF on RACH, so we provide " |
| 1040 | "one:\n"); |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 1041 | if ((ra & 0xf8) == 0x70) { |
| 1042 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests single block " |
| 1043 | "allocation\n"); |
| 1044 | sb = 1; |
| 1045 | } else if (bts->force_two_phase) { |
| 1046 | LOGP(DRLCMAC, LOGL_DEBUG, "MS requests single phase access, " |
| 1047 | "but we force two phase access\n"); |
| 1048 | sb = 1; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1049 | } |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1050 | if (qta < 0) |
| 1051 | qta = 0; |
| 1052 | if (qta > 252) |
| 1053 | qta = 252; |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 1054 | if (sb) { |
Holger Hans Peter Freyther | cedf890 | 2013-10-19 20:47:12 +0200 | [diff] [blame] | 1055 | rc = bts->bts->sba()->alloc(&trx, &ts, &sb_fn, qta >> 2); |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 1056 | if (rc < 0) |
| 1057 | return rc; |
| 1058 | LOGP(DRLCMAC, LOGL_DEBUG, "RX: [PCU <- BTS] RACH qbit-ta=%d " |
| 1059 | "ra=0x%02x, Fn=%d (%d,%d,%d)\n", qta, ra, Fn, |
| 1060 | (Fn / (26 * 51)) % 32, Fn % 51, Fn % 26); |
| 1061 | LOGP(DRLCMAC, LOGL_INFO, "TX: Immediate Assignment Uplink " |
| 1062 | "(AGCH)\n"); |
| 1063 | } else { |
| 1064 | // Create new TBF |
Holger Hans Peter Freyther | bcafdf8 | 2013-08-24 21:13:31 +0200 | [diff] [blame] | 1065 | #warning "Copy and pate with other routines.." |
Holger Hans Peter Freyther | d6bd91e | 2013-08-24 21:16:55 +0200 | [diff] [blame] | 1066 | tfi = tfi_find_free(bts, GPRS_RLCMAC_UL_TBF, &trx, -1); |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 1067 | if (tfi < 0) { |
| 1068 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH ressource\n"); |
| 1069 | /* FIXME: send reject */ |
| 1070 | return -EBUSY; |
| 1071 | } |
| 1072 | /* 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] | 1073 | 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] | 1074 | if (!tbf) { |
| 1075 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH ressource\n"); |
| 1076 | /* FIXME: send reject */ |
| 1077 | return -EBUSY; |
| 1078 | } |
| 1079 | tbf->ta = qta >> 2; |
| 1080 | tbf_new_state(tbf, GPRS_RLCMAC_FLOW); |
| 1081 | tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_CCCH); |
| 1082 | tbf_timer_start(tbf, 3169, bts->t3169, 0); |
| 1083 | LOGP(DRLCMAC, LOGL_DEBUG, "TBF: [UPLINK] START TFI: %u\n", |
| 1084 | tbf->tfi); |
| 1085 | LOGP(DRLCMAC, LOGL_DEBUG, "RX: [PCU <- BTS] TFI: %u RACH " |
| 1086 | "qbit-ta=%d ra=0x%02x, Fn=%d (%d,%d,%d)\n", tbf->tfi, |
| 1087 | qta, ra, Fn, (Fn / (26 * 51)) % 32, Fn % 51, Fn % 26); |
| 1088 | LOGP(DRLCMAC, LOGL_INFO, "TX: START TFI: %u Immediate " |
| 1089 | "Assignment Uplink (AGCH)\n", tbf->tfi); |
| 1090 | } |
Andreas Eversberg | 7b04501 | 2012-07-05 07:38:49 +0200 | [diff] [blame] | 1091 | bitvec *immediate_assignment = bitvec_alloc(22) /* without plen */; |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 1092 | bitvec_unhex(immediate_assignment, |
| 1093 | "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
| 1094 | if (sb) |
Holger Hans Peter Freyther | 63f29d6 | 2013-10-19 19:04:03 +0200 | [diff] [blame] | 1095 | plen = Encoding::write_immediate_assignment(bts, immediate_assignment, 0, ra, |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 1096 | Fn, qta >> 2, bts->trx[trx].arfcn, ts, |
Andreas Eversberg | aafcbbb | 2012-09-27 09:20:45 +0200 | [diff] [blame] | 1097 | 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] | 1098 | bts->alpha, bts->gamma, -1); |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 1099 | else |
Holger Hans Peter Freyther | 63f29d6 | 2013-10-19 19:04:03 +0200 | [diff] [blame] | 1100 | plen = Encoding::write_immediate_assignment(bts, immediate_assignment, 0, ra, |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 1101 | Fn, tbf->ta, tbf->arfcn, tbf->first_ts, tbf->tsc, |
Andreas Eversberg | aafcbbb | 2012-09-27 09:20:45 +0200 | [diff] [blame] | 1102 | 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] | 1103 | bts->alpha, bts->gamma, -1); |
Andreas Eversberg | 7b04501 | 2012-07-05 07:38:49 +0200 | [diff] [blame] | 1104 | pcu_l1if_tx_agch(immediate_assignment, plen); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1105 | bitvec_free(immediate_assignment); |
| 1106 | |
| 1107 | return 0; |
| 1108 | } |
| 1109 | |
| 1110 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1111 | /* send DL data block |
| 1112 | * |
| 1113 | * The messages are fragmented and forwarded as data blocks. |
| 1114 | */ |
| 1115 | struct msgb *gprs_rlcmac_send_data_block_acknowledged( |
Holger Hans Peter Freyther | 4ffc260 | 2013-10-17 15:21:10 +0200 | [diff] [blame] | 1116 | struct gprs_rlcmac_bts *bts, |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 1117 | struct gprs_rlcmac_tbf *tbf, uint32_t fn, uint8_t ts) |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1118 | { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1119 | struct rlc_dl_header *rh; |
| 1120 | struct rlc_li_field *li; |
| 1121 | uint8_t block_length; /* total length of block, including spare bits */ |
| 1122 | uint8_t block_data; /* usable data of block, w/o spare bits, inc. MAC */ |
| 1123 | struct msgb *msg, *dl_msg; |
| 1124 | uint8_t bsn; |
| 1125 | uint16_t mod_sns = tbf->sns - 1; |
| 1126 | uint16_t mod_sns_half = (tbf->sns >> 1) - 1; |
| 1127 | uint16_t index; |
| 1128 | uint8_t *delimiter, *data, *e_pointer; |
| 1129 | uint8_t len; |
| 1130 | uint16_t space, chunk; |
Andreas Eversberg | 0c9b50c | 2012-10-07 15:50:51 +0200 | [diff] [blame] | 1131 | int first_fin_ack = 0; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1132 | |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 1133 | LOGP(DRLCMACDL, LOGL_DEBUG, "DL DATA TBF=%d downlink (V(A)==%d .. " |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1134 | "V(S)==%d)\n", tbf->tfi, tbf->dir.dl.v_a, tbf->dir.dl.v_s); |
| 1135 | |
| 1136 | do_resend: |
| 1137 | /* check if there is a block with negative acknowledgement */ |
| 1138 | for (bsn = tbf->dir.dl.v_a; bsn != tbf->dir.dl.v_s; |
| 1139 | bsn = (bsn + 1) & mod_sns) { |
| 1140 | index = (bsn & mod_sns_half); |
| 1141 | if (tbf->dir.dl.v_b[index] == 'N' |
| 1142 | || tbf->dir.dl.v_b[index] == 'X') { |
| 1143 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Resending BSN %d\n", |
| 1144 | bsn); |
| 1145 | /* re-send block with negative aknowlegement */ |
| 1146 | tbf->dir.dl.v_b[index] = 'U'; /* unacked */ |
| 1147 | goto tx_block; |
| 1148 | } |
| 1149 | } |
| 1150 | |
| 1151 | /* if the window has stalled, or transfer is complete, |
| 1152 | * send an unacknowledged block */ |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 1153 | if (tbf->state_is(GPRS_RLCMAC_FINISHED) |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1154 | || ((tbf->dir.dl.v_s - tbf->dir.dl.v_a) & mod_sns) == tbf->ws) { |
| 1155 | int resend = 0; |
| 1156 | |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 1157 | if (tbf->state_is(GPRS_RLCMAC_FINISHED)) |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1158 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Restarting at BSN %d, " |
| 1159 | "because all blocks have been transmitted.\n", |
| 1160 | tbf->dir.dl.v_a); |
| 1161 | else |
Andreas Eversberg | 4b470ff | 2012-07-16 12:02:40 +0200 | [diff] [blame] | 1162 | LOGP(DRLCMACDL, LOGL_NOTICE, "- Restarting at BSN %d, " |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1163 | "because all window is stalled.\n", |
| 1164 | tbf->dir.dl.v_a); |
| 1165 | /* If V(S) == V(A) and finished state, we would have received |
| 1166 | * acknowledgement of all transmitted block. In this case we |
| 1167 | * would have transmitted the final block, and received ack |
| 1168 | * from MS. But in this case we did not receive the final ack |
| 1169 | * indication from MS. This should never happen if MS works |
| 1170 | * correctly. */ |
| 1171 | if (tbf->dir.dl.v_s == tbf->dir.dl.v_a) { |
Andreas Eversberg | 0c9b50c | 2012-10-07 15:50:51 +0200 | [diff] [blame] | 1172 | LOGP(DRLCMACDL, LOGL_DEBUG, "- MS acked all blocks, " |
| 1173 | "so we re-transmit final block!\n"); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1174 | /* we just send final block again */ |
| 1175 | index = ((tbf->dir.dl.v_s - 1) & mod_sns_half); |
| 1176 | goto tx_block; |
| 1177 | } |
| 1178 | |
| 1179 | /* cycle through all unacked blocks */ |
| 1180 | for (bsn = tbf->dir.dl.v_a; bsn != tbf->dir.dl.v_s; |
| 1181 | bsn = (bsn + 1) & mod_sns) { |
| 1182 | index = (bsn & mod_sns_half); |
| 1183 | if (tbf->dir.dl.v_b[index] == 'U') { |
| 1184 | /* mark to be re-send */ |
| 1185 | tbf->dir.dl.v_b[index] = 'X'; |
| 1186 | resend++; |
| 1187 | } |
| 1188 | } |
| 1189 | /* At this point there should be at leasst one unacked block |
| 1190 | * to be resent. If not, this is an software error. */ |
| 1191 | if (resend == 0) { |
| 1192 | LOGP(DRLCMACDL, LOGL_ERROR, "Software error: " |
| 1193 | "There are no unacknowledged blocks, but V(A) " |
| 1194 | " != V(S). PLEASE FIX!\n"); |
| 1195 | /* we just send final block again */ |
| 1196 | index = ((tbf->dir.dl.v_s - 1) & mod_sns_half); |
| 1197 | goto tx_block; |
| 1198 | } |
| 1199 | goto do_resend; |
| 1200 | } |
| 1201 | |
| 1202 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Sending new block at BSN %d\n", |
| 1203 | tbf->dir.dl.v_s); |
| 1204 | |
| 1205 | /* now we still have untransmitted LLC data, so we fill mac block */ |
| 1206 | index = tbf->dir.dl.v_s & mod_sns_half; |
| 1207 | data = tbf->rlc_block[index]; |
Andreas Eversberg | 3b1332c | 2012-10-03 14:20:53 +0200 | [diff] [blame] | 1208 | if (tbf->cs == 0) { |
Andreas Eversberg | 499ff41 | 2012-10-03 14:21:36 +0200 | [diff] [blame] | 1209 | tbf->cs = bts->initial_cs_dl; |
Andreas Eversberg | 3b1332c | 2012-10-03 14:20:53 +0200 | [diff] [blame] | 1210 | if (tbf->cs < 1 || tbf->cs > 4) |
| 1211 | tbf->cs = 1; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1212 | } |
Andreas Eversberg | 3b1332c | 2012-10-03 14:20:53 +0200 | [diff] [blame] | 1213 | block_length = gprs_rlcmac_cs[tbf->cs].block_length; |
| 1214 | block_data = gprs_rlcmac_cs[tbf->cs].block_data; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1215 | memset(data, 0x2b, block_data); /* spare bits will be left 0 */ |
| 1216 | rh = (struct rlc_dl_header *)data; |
| 1217 | rh->pt = 0; /* Data Block */ |
| 1218 | rh->rrbp = rh->s_p = 0; /* Polling, set later, if required */ |
| 1219 | rh->usf = 7; /* will be set at scheduler */ |
| 1220 | rh->pr = 0; /* FIXME: power reduction */ |
| 1221 | rh->tfi = tbf->tfi; /* TFI */ |
| 1222 | rh->fbi = 0; /* Final Block Indicator, set late, if true */ |
| 1223 | rh->bsn = tbf->dir.dl.v_s; /* Block Sequence Number */ |
| 1224 | rh->e = 0; /* Extension bit, maybe set later */ |
| 1225 | e_pointer = data + 2; /* points to E of current chunk */ |
| 1226 | data += 3; |
| 1227 | delimiter = data; /* where next length header would be stored */ |
| 1228 | space = block_data - 3; |
| 1229 | while (1) { |
| 1230 | chunk = tbf->llc_length - tbf->llc_index; |
| 1231 | /* if chunk will exceed block limit */ |
| 1232 | if (chunk > space) { |
| 1233 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- Chunk with length %d " |
| 1234 | "larger than space (%d) left in block: copy " |
| 1235 | "only remaining space, and we are done\n", |
| 1236 | chunk, space); |
| 1237 | /* block is filled, so there is no extension */ |
| 1238 | *e_pointer |= 0x01; |
| 1239 | /* fill only space */ |
| 1240 | memcpy(data, tbf->llc_frame + tbf->llc_index, space); |
| 1241 | /* incement index */ |
| 1242 | tbf->llc_index += space; |
| 1243 | /* return data block as message */ |
| 1244 | break; |
| 1245 | } |
| 1246 | /* if FINAL chunk would fit precisely in space left */ |
| 1247 | if (chunk == space && llist_empty(&tbf->llc_queue)) { |
| 1248 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- Chunk with length %d " |
| 1249 | "would exactly fit into space (%d): because " |
| 1250 | "this is a final block, we don't add length " |
| 1251 | "header, and we are done\n", chunk, space); |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 1252 | LOGP(DRLCMACDL, LOGL_INFO, "Complete DL frame for " |
| 1253 | "TBF=%d that fits precisely in last block: " |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 1254 | "len=%d\n", tbf->tfi, tbf->llc_length); |
Andreas Eversberg | 050ace2 | 2013-03-16 16:22:02 +0100 | [diff] [blame] | 1255 | gprs_rlcmac_dl_bw(tbf, tbf->llc_length); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1256 | /* block is filled, so there is no extension */ |
| 1257 | *e_pointer |= 0x01; |
| 1258 | /* fill space */ |
| 1259 | memcpy(data, tbf->llc_frame + tbf->llc_index, space); |
| 1260 | /* reset LLC frame */ |
| 1261 | tbf->llc_index = tbf->llc_length = 0; |
| 1262 | /* final block */ |
| 1263 | rh->fbi = 1; /* we indicate final block */ |
| 1264 | tbf_new_state(tbf, GPRS_RLCMAC_FINISHED); |
| 1265 | /* return data block as message */ |
| 1266 | break; |
| 1267 | } |
| 1268 | /* if chunk would fit exactly in space left */ |
| 1269 | if (chunk == space) { |
| 1270 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- Chunk with length %d " |
| 1271 | "would exactly fit into space (%d): add length " |
| 1272 | "header with LI=0, to make frame extend to " |
| 1273 | "next block, and we are done\n", chunk, space); |
| 1274 | /* make space for delimiter */ |
| 1275 | if (delimiter != data) |
| 1276 | memcpy(delimiter + 1, delimiter, |
| 1277 | data - delimiter); |
| 1278 | data++; |
| 1279 | space--; |
| 1280 | /* add LI with 0 length */ |
| 1281 | li = (struct rlc_li_field *)delimiter; |
| 1282 | li->e = 1; /* not more extension */ |
| 1283 | li->m = 0; /* shall be set to 0, in case of li = 0 */ |
| 1284 | li->li = 0; /* chunk fills the complete space */ |
| 1285 | // no need to set e_pointer nor increase delimiter |
| 1286 | /* fill only space, which is 1 octet less than chunk */ |
| 1287 | memcpy(data, tbf->llc_frame + tbf->llc_index, space); |
| 1288 | /* incement index */ |
| 1289 | tbf->llc_index += space; |
| 1290 | /* return data block as message */ |
| 1291 | break; |
| 1292 | } |
| 1293 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- Chunk with length %d is less " |
| 1294 | "than remaining space (%d): add length header to " |
| 1295 | "to delimit LLC frame\n", chunk, space); |
| 1296 | /* the LLC frame chunk ends in this block */ |
| 1297 | /* make space for delimiter */ |
| 1298 | if (delimiter != data) |
| 1299 | memcpy(delimiter + 1, delimiter, data - delimiter); |
| 1300 | data++; |
| 1301 | space--; |
| 1302 | /* add LI to delimit frame */ |
| 1303 | li = (struct rlc_li_field *)delimiter; |
| 1304 | li->e = 0; /* Extension bit, maybe set later */ |
| 1305 | li->m = 0; /* will be set later, if there is more LLC data */ |
| 1306 | li->li = chunk; /* length of chunk */ |
| 1307 | e_pointer = delimiter; /* points to E of current delimiter */ |
| 1308 | delimiter++; |
| 1309 | /* copy (rest of) LLC frame to space */ |
| 1310 | memcpy(data, tbf->llc_frame + tbf->llc_index, chunk); |
| 1311 | data += chunk; |
| 1312 | space -= chunk; |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 1313 | LOGP(DRLCMACDL, LOGL_INFO, "Complete DL frame for TBF=%d: " |
| 1314 | "len=%d\n", tbf->tfi, tbf->llc_length); |
Andreas Eversberg | 050ace2 | 2013-03-16 16:22:02 +0100 | [diff] [blame] | 1315 | gprs_rlcmac_dl_bw(tbf, tbf->llc_length); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1316 | /* reset LLC frame */ |
| 1317 | tbf->llc_index = tbf->llc_length = 0; |
| 1318 | /* dequeue next LLC frame, if any */ |
Holger Hans Peter Freyther | 1702f10 | 2013-10-20 08:44:02 +0200 | [diff] [blame] | 1319 | msg = tbf->llc_dequeue(gprs_bssgp_pcu_current_bctx()); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1320 | if (msg) { |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 1321 | LOGP(DRLCMACDL, LOGL_INFO, "- Dequeue next LLC for " |
| 1322 | "TBF=%d (len=%d)\n", tbf->tfi, msg->len); |
Holger Hans Peter Freyther | 1702f10 | 2013-10-20 08:44:02 +0200 | [diff] [blame] | 1323 | tbf->update_llc_frame(msg); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1324 | msgb_free(msg); |
| 1325 | } |
| 1326 | /* if we have more data and we have space left */ |
| 1327 | if (space > 0 && tbf->llc_length) { |
| 1328 | li->m = 1; /* we indicate more frames to follow */ |
| 1329 | continue; |
| 1330 | } |
| 1331 | /* if we don't have more LLC frames */ |
| 1332 | if (!tbf->llc_length) { |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 1333 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- Final block, so we " |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1334 | "done.\n"); |
| 1335 | li->e = 1; /* we cannot extend */ |
| 1336 | rh->fbi = 1; /* we indicate final block */ |
Andreas Eversberg | 5f14bd9 | 2012-10-03 14:20:26 +0200 | [diff] [blame] | 1337 | first_fin_ack = 1; |
Andreas Eversberg | f54a89e | 2012-07-16 11:56:11 +0200 | [diff] [blame] | 1338 | /* + 1 indicates: first final ack */ |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1339 | tbf_new_state(tbf, GPRS_RLCMAC_FINISHED); |
| 1340 | break; |
| 1341 | } |
| 1342 | /* we have no space left */ |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 1343 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- No space left, so we are " |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1344 | "done.\n"); |
| 1345 | li->e = 1; /* we cannot extend */ |
| 1346 | break; |
| 1347 | } |
| 1348 | LOGP(DRLCMACDL, LOGL_DEBUG, "data block: %s\n", |
| 1349 | osmo_hexdump(tbf->rlc_block[index], block_length)); |
| 1350 | tbf->rlc_block_len[index] = block_length; |
| 1351 | /* raise send state and set ack state array */ |
| 1352 | tbf->dir.dl.v_b[index] = 'U'; /* unacked */ |
| 1353 | tbf->dir.dl.v_s = (tbf->dir.dl.v_s + 1) & mod_sns; /* inc send state */ |
| 1354 | |
| 1355 | tx_block: |
| 1356 | /* from this point on, new block is sent or old block is resent */ |
| 1357 | |
| 1358 | /* get data and header from current block */ |
| 1359 | data = tbf->rlc_block[index]; |
| 1360 | len = tbf->rlc_block_len[index]; |
| 1361 | rh = (struct rlc_dl_header *)data; |
| 1362 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1363 | /* Clear Polling, if still set in history buffer */ |
| 1364 | rh->s_p = 0; |
| 1365 | |
Andreas Eversberg | f54a89e | 2012-07-16 11:56:11 +0200 | [diff] [blame] | 1366 | /* poll after POLL_ACK_AFTER_FRAMES frames, or when final block is tx. |
| 1367 | */ |
Andreas Eversberg | 5f14bd9 | 2012-10-03 14:20:26 +0200 | [diff] [blame] | 1368 | if (tbf->dir.dl.tx_counter >= POLL_ACK_AFTER_FRAMES || first_fin_ack) { |
| 1369 | if (first_fin_ack) { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1370 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Scheduling Ack/Nack " |
Andreas Eversberg | 5f14bd9 | 2012-10-03 14:20:26 +0200 | [diff] [blame] | 1371 | "polling, because first final block sent.\n"); |
Andreas Eversberg | 5e043da | 2012-07-15 06:51:30 +0200 | [diff] [blame] | 1372 | } else { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1373 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Scheduling Ack/Nack " |
| 1374 | "polling, because %d blocks sent.\n", |
Andreas Eversberg | f54a89e | 2012-07-16 11:56:11 +0200 | [diff] [blame] | 1375 | POLL_ACK_AFTER_FRAMES); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1376 | } |
Andreas Eversberg | 5e043da | 2012-07-15 06:51:30 +0200 | [diff] [blame] | 1377 | /* scheduling not possible, because: */ |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1378 | if (tbf->poll_state != GPRS_RLCMAC_POLL_NONE) |
Andreas Eversberg | 5e043da | 2012-07-15 06:51:30 +0200 | [diff] [blame] | 1379 | LOGP(DRLCMAC, LOGL_DEBUG, "Polling is already " |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1380 | "sheduled for TBF=%d, so we must wait for " |
| 1381 | "requesting downlink ack\n", tbf->tfi); |
Andreas Eversberg | 5e043da | 2012-07-15 06:51:30 +0200 | [diff] [blame] | 1382 | else if (tbf->control_ts != ts) |
| 1383 | LOGP(DRLCMAC, LOGL_DEBUG, "Polling cannot be " |
| 1384 | "sheduled in this TS %d, waiting for " |
| 1385 | "TS %d\n", ts, tbf->control_ts); |
Holger Hans Peter Freyther | cedf890 | 2013-10-19 20:47:12 +0200 | [diff] [blame] | 1386 | else if (bts->bts->sba()->find(tbf->trx_no, ts, (fn + 13) % 2715648)) |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 1387 | LOGP(DRLCMAC, LOGL_DEBUG, "Polling cannot be " |
| 1388 | "sheduled, because single block alllocation " |
| 1389 | "already exists\n"); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1390 | else { |
Andreas Eversberg | ee31b78 | 2012-07-15 16:27:01 +0200 | [diff] [blame] | 1391 | LOGP(DRLCMAC, LOGL_DEBUG, "Polling sheduled in this " |
| 1392 | "TS %d\n", ts); |
Andreas Eversberg | 5f14bd9 | 2012-10-03 14:20:26 +0200 | [diff] [blame] | 1393 | tbf->dir.dl.tx_counter = 0; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1394 | /* start timer whenever we send the final block */ |
| 1395 | if (rh->fbi == 1) |
Andreas Eversberg | dfa563c | 2012-07-06 08:13:59 +0200 | [diff] [blame] | 1396 | tbf_timer_start(tbf, 3191, bts->t3191, 0); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1397 | |
| 1398 | /* schedule polling */ |
| 1399 | tbf->poll_state = GPRS_RLCMAC_POLL_SCHED; |
| 1400 | tbf->poll_fn = (fn + 13) % 2715648; |
| 1401 | |
Andreas Eversberg | b83e2a7 | 2012-10-07 15:26:00 +0200 | [diff] [blame] | 1402 | #ifdef DEBUG_DIAGRAM |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 1403 | debug_diagram(bts->bts, tbf->diag, "poll DL-ACK"); |
Andreas Eversberg | b83e2a7 | 2012-10-07 15:26:00 +0200 | [diff] [blame] | 1404 | if (first_fin_ack) |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 1405 | debug_diagram(bts->bts, tbf->diag, "(is first FINAL)"); |
Andreas Eversberg | b83e2a7 | 2012-10-07 15:26:00 +0200 | [diff] [blame] | 1406 | if (rh->fbi) |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 1407 | debug_diagram(bts->bts, tbf->diag, "(FBI is set)"); |
Andreas Eversberg | b83e2a7 | 2012-10-07 15:26:00 +0200 | [diff] [blame] | 1408 | #endif |
| 1409 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1410 | /* set polling in header */ |
| 1411 | rh->rrbp = 0; /* N+13 */ |
| 1412 | rh->s_p = 1; /* Polling */ |
Andreas Eversberg | 5e043da | 2012-07-15 06:51:30 +0200 | [diff] [blame] | 1413 | |
| 1414 | /* Increment TX-counter */ |
| 1415 | tbf->dir.dl.tx_counter++; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1416 | } |
Andreas Eversberg | 5e043da | 2012-07-15 06:51:30 +0200 | [diff] [blame] | 1417 | } else { |
| 1418 | /* Increment TX-counter */ |
| 1419 | tbf->dir.dl.tx_counter++; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1420 | } |
| 1421 | |
| 1422 | /* return data block as message */ |
| 1423 | dl_msg = msgb_alloc(len, "rlcmac_dl_data"); |
| 1424 | if (!dl_msg) |
| 1425 | return NULL; |
| 1426 | memcpy(msgb_put(dl_msg, len), data, len); |
| 1427 | |
| 1428 | return dl_msg; |
| 1429 | } |
| 1430 | |
Holger Hans Peter Freyther | 344ff48 | 2013-10-17 12:01:04 +0200 | [diff] [blame] | 1431 | int gprs_rlcmac_downlink_ack(struct gprs_rlcmac_bts *bts, |
| 1432 | struct gprs_rlcmac_tbf *tbf, uint8_t final, |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1433 | uint8_t ssn, uint8_t *rbb) |
| 1434 | { |
| 1435 | char show_rbb[65], show_v_b[RLC_MAX_SNS + 1]; |
| 1436 | uint16_t mod_sns = tbf->sns - 1; |
| 1437 | uint16_t mod_sns_half = (tbf->sns >> 1) - 1; |
| 1438 | int i; /* must be signed */ |
| 1439 | int16_t dist; /* must be signed */ |
| 1440 | uint8_t bit; |
| 1441 | uint16_t bsn; |
| 1442 | struct msgb *msg; |
Andreas Eversberg | 050ace2 | 2013-03-16 16:22:02 +0100 | [diff] [blame] | 1443 | uint16_t lost = 0, received = 0; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1444 | |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 1445 | LOGP(DRLCMACDL, LOGL_DEBUG, "TBF=%d downlink acknowledge\n", |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1446 | tbf->tfi); |
| 1447 | |
| 1448 | if (!final) { |
| 1449 | /* show received array in debug (bit 64..1) */ |
| 1450 | for (i = 63; i >= 0; i--) { |
| 1451 | bit = (rbb[i >> 3] >> (7 - (i&7))) & 1; |
| 1452 | show_rbb[i] = (bit) ? '1' : 'o'; |
| 1453 | } |
| 1454 | show_rbb[64] = '\0'; |
| 1455 | LOGP(DRLCMACDL, LOGL_DEBUG, "- ack: (BSN=%d)\"%s\"" |
Andreas Eversberg | 4b470ff | 2012-07-16 12:02:40 +0200 | [diff] [blame] | 1456 | "(BSN=%d) 1=ACK o=NACK\n", (ssn - 64) & mod_sns, |
| 1457 | show_rbb, (ssn - 1) & mod_sns); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1458 | |
| 1459 | /* apply received array to receive state (SSN-64..SSN-1) */ |
| 1460 | /* calculate distance of ssn from V(S) */ |
| 1461 | dist = (tbf->dir.dl.v_s - ssn) & mod_sns; |
| 1462 | /* check if distance is less than distance V(A)..V(S) */ |
Andreas Eversberg | 050ace2 | 2013-03-16 16:22:02 +0100 | [diff] [blame] | 1463 | 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] | 1464 | /* this might happpen, if the downlink assignment |
| 1465 | * was not received by ms and the ack refers |
| 1466 | * to previous TBF |
| 1467 | * FIXME: we should implement polling for |
| 1468 | * control ack!*/ |
| 1469 | LOGP(DRLCMACDL, LOGL_NOTICE, "- ack range is out of " |
| 1470 | "V(A)..V(S) range (DL TBF=%d) Free TFB!\n", |
| 1471 | tbf->tfi); |
| 1472 | return 1; /* indicate to free TBF */ |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1473 | } |
Andreas Eversberg | 050ace2 | 2013-03-16 16:22:02 +0100 | [diff] [blame] | 1474 | /* SSN - 1 is in range V(A)..V(S)-1 */ |
| 1475 | for (i = 63, bsn = (ssn - 1) & mod_sns; |
| 1476 | i >= 0 && bsn != ((tbf->dir.dl.v_a - 1) & mod_sns); |
| 1477 | i--, bsn = (bsn - 1) & mod_sns) { |
| 1478 | bit = (rbb[i >> 3] >> (7 - (i&7))) & 1; |
| 1479 | if (bit) { |
| 1480 | LOGP(DRLCMACDL, LOGL_DEBUG, "- got " |
| 1481 | "ack for BSN=%d\n", bsn); |
| 1482 | if (tbf->dir.dl.v_b[bsn & mod_sns_half] |
| 1483 | != 'A') |
| 1484 | received++; |
| 1485 | tbf->dir.dl.v_b[bsn & mod_sns_half] = 'A'; |
| 1486 | } else { |
| 1487 | LOGP(DRLCMACDL, LOGL_DEBUG, "- got " |
| 1488 | "NACK for BSN=%d\n", bsn); |
| 1489 | tbf->dir.dl.v_b[bsn & mod_sns_half] = 'N'; |
| 1490 | lost++; |
| 1491 | } |
| 1492 | } |
| 1493 | /* report lost and received packets */ |
| 1494 | gprs_rlcmac_received_lost(tbf, received, lost); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1495 | |
| 1496 | /* raise V(A), if possible */ |
| 1497 | for (i = 0, bsn = tbf->dir.dl.v_a; bsn != tbf->dir.dl.v_s; |
| 1498 | i++, bsn = (bsn + 1) & mod_sns) { |
| 1499 | if (tbf->dir.dl.v_b[bsn & mod_sns_half] == 'A') { |
| 1500 | tbf->dir.dl.v_b[bsn & mod_sns_half] = 'I'; |
| 1501 | /* mark invalid */ |
| 1502 | tbf->dir.dl.v_a = (tbf->dir.dl.v_a + 1) |
| 1503 | & mod_sns; |
| 1504 | } else |
| 1505 | break; |
| 1506 | } |
| 1507 | |
| 1508 | /* show receive state array in debug (V(A)..V(S)-1) */ |
| 1509 | for (i = 0, bsn = tbf->dir.dl.v_a; bsn != tbf->dir.dl.v_s; |
| 1510 | i++, bsn = (bsn + 1) & mod_sns) { |
| 1511 | show_v_b[i] = tbf->dir.dl.v_b[bsn & mod_sns_half]; |
| 1512 | if (show_v_b[i] == 0) |
| 1513 | show_v_b[i] = ' '; |
| 1514 | } |
| 1515 | show_v_b[i] = '\0'; |
| 1516 | LOGP(DRLCMACDL, LOGL_DEBUG, "- V(B): (V(A)=%d)\"%s\"" |
| 1517 | "(V(S)-1=%d) A=Acked N=Nacked U=Unacked " |
| 1518 | "X=Resend-Unacked\n", tbf->dir.dl.v_a, show_v_b, |
| 1519 | (tbf->dir.dl.v_s - 1) & mod_sns); |
| 1520 | |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 1521 | if (tbf->state_is(GPRS_RLCMAC_FINISHED) |
Andreas Eversberg | 6664a90 | 2012-07-15 06:52:19 +0200 | [diff] [blame] | 1522 | && tbf->dir.dl.v_s == tbf->dir.dl.v_a) { |
Andreas Eversberg | 0c9b50c | 2012-10-07 15:50:51 +0200 | [diff] [blame] | 1523 | LOGP(DRLCMACDL, LOGL_NOTICE, "Received acknowledge of " |
| 1524 | "all blocks, but without final ack " |
| 1525 | "inidcation (don't worry)\n"); |
| 1526 | } |
| 1527 | return 0; |
Andreas Eversberg | b83e2a7 | 2012-10-07 15:26:00 +0200 | [diff] [blame] | 1528 | } |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1529 | |
Andreas Eversberg | 0c9b50c | 2012-10-07 15:50:51 +0200 | [diff] [blame] | 1530 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Final ACK received.\n"); |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 1531 | debug_diagram(bts->bts, tbf->diag, "got Final ACK"); |
Andreas Eversberg | 050ace2 | 2013-03-16 16:22:02 +0100 | [diff] [blame] | 1532 | /* range V(A)..V(S)-1 */ |
| 1533 | for (bsn = tbf->dir.dl.v_a; bsn != tbf->dir.dl.v_s; |
| 1534 | bsn = (bsn + 1) & mod_sns) { |
| 1535 | if (tbf->dir.dl.v_b[bsn & mod_sns_half] != 'A') |
| 1536 | received++; |
| 1537 | } |
| 1538 | |
| 1539 | /* report all outstanding packets as received */ |
| 1540 | gprs_rlcmac_received_lost(tbf, received, lost); |
Andreas Eversberg | 0c9b50c | 2012-10-07 15:50:51 +0200 | [diff] [blame] | 1541 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1542 | /* check for LLC PDU in the LLC Queue */ |
Holger Hans Peter Freyther | 1702f10 | 2013-10-20 08:44:02 +0200 | [diff] [blame] | 1543 | msg = tbf->llc_dequeue(gprs_bssgp_pcu_current_bctx()); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1544 | if (!msg) { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1545 | /* no message, start T3193, change state to RELEASE */ |
| 1546 | LOGP(DRLCMACDL, LOGL_DEBUG, "- No new message, so we " |
| 1547 | "release.\n"); |
Andreas Eversberg | b3c6f6c | 2012-07-06 07:40:08 +0200 | [diff] [blame] | 1548 | /* start T3193 */ |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 1549 | debug_diagram(bts->bts, tbf->diag, "start T3193"); |
Andreas Eversberg | dfa563c | 2012-07-06 08:13:59 +0200 | [diff] [blame] | 1550 | tbf_timer_start(tbf, 3193, bts->t3193_msec / 1000, |
Andreas Eversberg | df4d20e | 2012-09-24 13:49:38 +0200 | [diff] [blame] | 1551 | (bts->t3193_msec % 1000) * 1000); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1552 | tbf_new_state(tbf, GPRS_RLCMAC_WAIT_RELEASE); |
| 1553 | |
| 1554 | return 0; |
| 1555 | } |
Holger Hans Peter Freyther | 1702f10 | 2013-10-20 08:44:02 +0200 | [diff] [blame] | 1556 | #warning "Copy and paste on the sender path" |
| 1557 | tbf->update_llc_frame(msg); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1558 | msgb_free(msg); |
| 1559 | |
| 1560 | /* we have a message, so we trigger downlink assignment, and there |
| 1561 | * set the state to ASSIGN. also we set old_downlink, because we |
| 1562 | * re-use this tbf. */ |
| 1563 | LOGP(DRLCMAC, LOGL_DEBUG, "Trigger dowlink assignment on PACCH, " |
| 1564 | "because another LLC PDU has arrived in between\n"); |
| 1565 | memset(&tbf->dir.dl, 0, sizeof(tbf->dir.dl)); /* reset RLC states */ |
Andreas Eversberg | a9be154 | 2012-09-27 09:23:24 +0200 | [diff] [blame] | 1566 | tbf->state_flags &= GPRS_RLCMAC_FLAG_TO_MASK; /* keep TO flags */ |
| 1567 | tbf->state_flags &= ~(1 << GPRS_RLCMAC_FLAG_CCCH); |
Holger Hans Peter Freyther | 9f0c1d2 | 2013-10-19 21:24:34 +0200 | [diff] [blame] | 1568 | tbf_update(tbf); |
Holger Hans Peter Freyther | 344ff48 | 2013-10-17 12:01:04 +0200 | [diff] [blame] | 1569 | gprs_rlcmac_trigger_downlink_assignment(bts, tbf, tbf, NULL); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1570 | |
| 1571 | return 0; |
| 1572 | } |
| 1573 | |
| 1574 | |
| 1575 | struct msgb *gprs_rlcmac_send_packet_downlink_assignment( |
Holger Hans Peter Freyther | 9f521cd | 2013-10-17 13:48:11 +0200 | [diff] [blame] | 1576 | struct gprs_rlcmac_bts *bts, |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1577 | struct gprs_rlcmac_tbf *tbf, uint32_t fn) |
| 1578 | { |
| 1579 | struct msgb *msg; |
| 1580 | struct gprs_rlcmac_tbf *new_tbf; |
Andreas Eversberg | 802bb6e | 2012-08-06 11:15:05 +0200 | [diff] [blame] | 1581 | int poll_ass_dl = POLLING_ASSIGNMENT_DL; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1582 | |
Andreas Eversberg | 802bb6e | 2012-08-06 11:15:05 +0200 | [diff] [blame] | 1583 | if (poll_ass_dl && tbf->direction == GPRS_RLCMAC_DL_TBF |
| 1584 | && tbf->control_ts != tbf->first_common_ts) { |
| 1585 | LOGP(DRLCMAC, LOGL_NOTICE, "Cannot poll for downlink " |
Andreas Eversberg | f01929b | 2012-10-08 12:40:49 +0200 | [diff] [blame] | 1586 | "assigment, because MS cannot reply. (control TS=%d, " |
| 1587 | "first common TS=%d)\n", tbf->control_ts, |
| 1588 | tbf->first_common_ts); |
Andreas Eversberg | 802bb6e | 2012-08-06 11:15:05 +0200 | [diff] [blame] | 1589 | poll_ass_dl = 0; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1590 | } |
Andreas Eversberg | 802bb6e | 2012-08-06 11:15:05 +0200 | [diff] [blame] | 1591 | if (poll_ass_dl) { |
| 1592 | if (tbf->poll_state != GPRS_RLCMAC_POLL_NONE) { |
| 1593 | LOGP(DRLCMAC, LOGL_DEBUG, "Polling is already sheduled " |
| 1594 | "for TBF=%d, so we must wait for downlink " |
| 1595 | "assignment...\n", tbf->tfi); |
| 1596 | return NULL; |
| 1597 | } |
Holger Hans Peter Freyther | cedf890 | 2013-10-19 20:47:12 +0200 | [diff] [blame] | 1598 | if (bts->bts->sba()->find(tbf->trx_no, tbf->control_ts, (fn + 13) % 2715648)) { |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 1599 | LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already " |
| 1600 | "scheduled for single block allocation...\n"); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1601 | return NULL; |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 1602 | } |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1603 | } |
| 1604 | |
| 1605 | /* on uplink TBF we get the downlink TBF to be assigned. */ |
Andreas Eversberg | ee31b78 | 2012-07-15 16:27:01 +0200 | [diff] [blame] | 1606 | if (tbf->direction == GPRS_RLCMAC_UL_TBF) { |
| 1607 | /* be sure to check first, if contention resolution is done, |
| 1608 | * otherwise we cannot send the assignment yet */ |
Andreas Eversberg | 08e93cd | 2012-07-26 08:13:06 +0200 | [diff] [blame] | 1609 | if (!tbf->dir.ul.contention_resolution_done) { |
Andreas Eversberg | 7f5352c | 2012-07-23 18:20:36 +0200 | [diff] [blame] | 1610 | LOGP(DRLCMAC, LOGL_DEBUG, "Cannot assign DL TBF now, " |
Andreas Eversberg | ee31b78 | 2012-07-15 16:27:01 +0200 | [diff] [blame] | 1611 | "because contention resolution is not " |
| 1612 | "finished.\n"); |
| 1613 | return NULL; |
| 1614 | } |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 1615 | new_tbf = bts->bts->tbf_by_tlli(tbf->tlli, GPRS_RLCMAC_DL_TBF); |
Andreas Eversberg | ee31b78 | 2012-07-15 16:27:01 +0200 | [diff] [blame] | 1616 | } else |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1617 | new_tbf = tbf; |
| 1618 | if (!new_tbf) { |
| 1619 | LOGP(DRLCMACDL, LOGL_ERROR, "We have a schedule for downlink " |
| 1620 | "assignment at uplink TBF=%d, but there is no downlink " |
| 1621 | "TBF\n", tbf->tfi); |
| 1622 | tbf->dl_ass_state = GPRS_RLCMAC_DL_ASS_NONE; |
| 1623 | return NULL; |
| 1624 | } |
| 1625 | |
| 1626 | msg = msgb_alloc(23, "rlcmac_dl_ass"); |
| 1627 | if (!msg) |
| 1628 | return NULL; |
| 1629 | bitvec *ass_vec = bitvec_alloc(23); |
| 1630 | if (!ass_vec) { |
| 1631 | msgb_free(msg); |
| 1632 | return NULL; |
| 1633 | } |
| 1634 | bitvec_unhex(ass_vec, |
| 1635 | "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 1636 | 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] | 1637 | 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] | 1638 | Encoding::write_packet_downlink_assignment(mac_control_block, tbf->tfi, |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 1639 | (tbf->direction == GPRS_RLCMAC_DL_TBF), new_tbf, |
Andreas Eversberg | afdd9e1 | 2012-10-07 17:08:55 +0200 | [diff] [blame] | 1640 | poll_ass_dl, bts->alpha, bts->gamma, -1, 0); |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 1641 | LOGP(DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ TX : Packet Downlink Assignment +++++++++++++++++++++++++\n"); |
Ivan Kluchnikov | ef7f28c | 2012-07-12 14:49:15 +0400 | [diff] [blame] | 1642 | encode_gsm_rlcmac_downlink(ass_vec, mac_control_block); |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 1643 | LOGPC(DCSN1, LOGL_NOTICE, "\n"); |
| 1644 | LOGP(DRLCMAC, LOGL_DEBUG, "------------------------- TX : Packet Downlink Assignment -------------------------\n"); |
Ivan Kluchnikov | ef7f28c | 2012-07-12 14:49:15 +0400 | [diff] [blame] | 1645 | bitvec_pack(ass_vec, msgb_put(msg, 23)); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1646 | bitvec_free(ass_vec); |
Andreas Eversberg | 6681bb8 | 2012-07-25 08:48:44 +0200 | [diff] [blame] | 1647 | talloc_free(mac_control_block); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1648 | |
Andreas Eversberg | 802bb6e | 2012-08-06 11:15:05 +0200 | [diff] [blame] | 1649 | if (poll_ass_dl) { |
| 1650 | tbf->poll_state = GPRS_RLCMAC_POLL_SCHED; |
| 1651 | tbf->poll_fn = (fn + 13) % 2715648; |
| 1652 | tbf->dl_ass_state = GPRS_RLCMAC_DL_ASS_WAIT_ACK; |
| 1653 | } else { |
| 1654 | tbf->dl_ass_state = GPRS_RLCMAC_DL_ASS_NONE; |
| 1655 | tbf_new_state(new_tbf, GPRS_RLCMAC_FLOW); |
| 1656 | tbf_assign_control_ts(new_tbf); |
Andreas Eversberg | cbcd124 | 2012-08-07 15:48:21 +0200 | [diff] [blame] | 1657 | /* stop pending assignment timer */ |
| 1658 | tbf_timer_stop(new_tbf); |
| 1659 | |
Andreas Eversberg | 802bb6e | 2012-08-06 11:15:05 +0200 | [diff] [blame] | 1660 | } |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 1661 | debug_diagram(bts->bts, tbf->diag, "send DL-ASS"); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1662 | |
| 1663 | return msg; |
| 1664 | } |
| 1665 | |
Holger Hans Peter Freyther | 344ff48 | 2013-10-17 12:01:04 +0200 | [diff] [blame] | 1666 | static void gprs_rlcmac_downlink_assignment(struct gprs_rlcmac_bts *bts, |
| 1667 | gprs_rlcmac_tbf *tbf, uint8_t poll, |
Holger Hans Peter Freyther | 52c911b | 2013-08-24 18:30:54 +0200 | [diff] [blame] | 1668 | const char *imsi) |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1669 | { |
Andreas Eversberg | aafcbbb | 2012-09-27 09:20:45 +0200 | [diff] [blame] | 1670 | int plen; |
| 1671 | |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 1672 | debug_diagram(bts->bts, tbf->diag, "IMM.ASS (PCH)"); |
Andreas Eversberg | e13fa2d | 2012-07-09 17:10:44 +0200 | [diff] [blame] | 1673 | LOGP(DRLCMAC, LOGL_INFO, "TX: START TFI: %u TLLI: 0x%08x Immediate Assignment Downlink (PCH)\n", tbf->tfi, tbf->tlli); |
Andreas Eversberg | 7b04501 | 2012-07-05 07:38:49 +0200 | [diff] [blame] | 1674 | bitvec *immediate_assignment = bitvec_alloc(22); /* without plen */ |
| 1675 | bitvec_unhex(immediate_assignment, "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1676 | /* use request reference that has maximum distance to current time, |
| 1677 | * so the assignment will not conflict with possible RACH requests. */ |
Holger Hans Peter Freyther | 63f29d6 | 2013-10-19 19:04:03 +0200 | [diff] [blame] | 1678 | plen = Encoding::write_immediate_assignment(bts, immediate_assignment, 1, 125, |
Andreas Eversberg | aafcbbb | 2012-09-27 09:20:45 +0200 | [diff] [blame] | 1679 | (tbf->pdch[tbf->first_ts]->last_rts_fn + 21216) % 2715648, tbf->ta, |
| 1680 | tbf->arfcn, tbf->first_ts, tbf->tsc, tbf->tfi, 0, tbf->tlli, poll, |
Andreas Eversberg | afdd9e1 | 2012-10-07 17:08:55 +0200 | [diff] [blame] | 1681 | tbf->poll_fn, 0, bts->alpha, bts->gamma, -1); |
Andreas Eversberg | e13fa2d | 2012-07-09 17:10:44 +0200 | [diff] [blame] | 1682 | pcu_l1if_tx_pch(immediate_assignment, plen, imsi); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1683 | bitvec_free(immediate_assignment); |
| 1684 | } |
| 1685 | |
| 1686 | /* depending on the current TBF, we assign on PACCH or AGCH */ |
Holger Hans Peter Freyther | 344ff48 | 2013-10-17 12:01:04 +0200 | [diff] [blame] | 1687 | void gprs_rlcmac_trigger_downlink_assignment(struct gprs_rlcmac_bts *bts, |
| 1688 | struct gprs_rlcmac_tbf *tbf, |
Holger Hans Peter Freyther | 52c911b | 2013-08-24 18:30:54 +0200 | [diff] [blame] | 1689 | struct gprs_rlcmac_tbf *old_tbf, const char *imsi) |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1690 | { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1691 | #ifdef DEBUG_DL_ASS_IDLE |
Andreas Eversberg | e13fa2d | 2012-07-09 17:10:44 +0200 | [diff] [blame] | 1692 | strncpy(debug_imsi, imsi); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1693 | LOGP(DRLCMAC, LOGL_ERROR, "**** DEBUGGING DOWNLINK ASSIGNMENT ****\n"); |
| 1694 | #endif |
| 1695 | |
| 1696 | /* stop pending timer */ |
| 1697 | tbf_timer_stop(tbf); |
| 1698 | |
| 1699 | /* check for downlink tbf: */ |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1700 | if (old_tbf) { |
| 1701 | #ifdef DEBUG_DL_ASS_IDLE |
| 1702 | LOGP(DRLCMAC, LOGL_ERROR, "We must wait for current TBF to be " |
| 1703 | "released.\n"); |
| 1704 | /* wait one second until assignment */ |
| 1705 | tbf_timer_start(tbf, 1234, 1,0); |
| 1706 | #else |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 1707 | LOGP(DRLCMAC, LOGL_DEBUG, "Send dowlink assignment on " |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 1708 | "PACCH, because %s TBF=%d exists for TLLI=0x%08x\n", |
Andreas Eversberg | 7f5352c | 2012-07-23 18:20:36 +0200 | [diff] [blame] | 1709 | (old_tbf->direction == GPRS_RLCMAC_UL_TBF) |
| 1710 | ? "UL" : "DL", old_tbf->tfi, old_tbf->tlli); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1711 | old_tbf->dl_ass_state = GPRS_RLCMAC_DL_ASS_SEND_ASS; |
| 1712 | /* use TA from old TBF */ |
| 1713 | tbf->ta = old_tbf->ta; |
| 1714 | /* change state */ |
| 1715 | tbf_new_state(tbf, GPRS_RLCMAC_ASSIGN); |
Andreas Eversberg | 14db19e | 2012-08-06 15:03:03 +0200 | [diff] [blame] | 1716 | tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_PACCH); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1717 | /* start timer */ |
| 1718 | tbf_timer_start(tbf, 0, Tassign_pacch); |
| 1719 | #endif |
| 1720 | } else { |
Andreas Eversberg | e13fa2d | 2012-07-09 17:10:44 +0200 | [diff] [blame] | 1721 | LOGP(DRLCMAC, LOGL_DEBUG, "Send dowlink assignment for TBF=%d on PCH, no TBF exist (IMSI=%s)\n", tbf->tfi, imsi); |
| 1722 | if (!imsi || strlen(imsi) < 3) { |
| 1723 | LOGP(DRLCMAC, LOGL_ERROR, "No valid IMSI!\n"); |
| 1724 | return; |
| 1725 | } |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1726 | /* change state */ |
| 1727 | tbf_new_state(tbf, GPRS_RLCMAC_ASSIGN); |
Andreas Eversberg | 14db19e | 2012-08-06 15:03:03 +0200 | [diff] [blame] | 1728 | tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_CCCH); |
Andreas Eversberg | a9be154 | 2012-09-27 09:23:24 +0200 | [diff] [blame] | 1729 | strncpy(tbf->dir.dl.imsi, imsi, sizeof(tbf->dir.dl.imsi)); |
Andreas Eversberg | 7438df7 | 2012-07-23 18:04:49 +0200 | [diff] [blame] | 1730 | /* send immediate assignment */ |
Holger Hans Peter Freyther | 344ff48 | 2013-10-17 12:01:04 +0200 | [diff] [blame] | 1731 | gprs_rlcmac_downlink_assignment(bts, tbf, 0, imsi); |
Andreas Eversberg | a9be154 | 2012-09-27 09:23:24 +0200 | [diff] [blame] | 1732 | tbf->dir.dl.wait_confirm = 1; |
| 1733 | } |
| 1734 | } |
| 1735 | |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 1736 | int gprs_rlcmac_imm_ass_cnf(BTS *bts, uint8_t *data, uint32_t fn) |
Andreas Eversberg | a9be154 | 2012-09-27 09:23:24 +0200 | [diff] [blame] | 1737 | { |
| 1738 | struct gprs_rlcmac_tbf *tbf; |
| 1739 | uint8_t plen; |
| 1740 | uint32_t tlli; |
| 1741 | |
| 1742 | /* move to IA Rest Octets */ |
| 1743 | plen = data[0] >> 2; |
| 1744 | data += 1 + plen; |
| 1745 | |
| 1746 | if ((*data & 0xf0) != 0xd0) { |
| 1747 | LOGP(DRLCMAC, LOGL_ERROR, "Got IMM.ASS confirm, but rest " |
| 1748 | "octets do not start with bit sequence 'HH01' " |
| 1749 | "(Packet Downlink Assignment)\n"); |
| 1750 | return -EINVAL; |
| 1751 | } |
| 1752 | |
| 1753 | /* get TLLI from downlink assignment */ |
| 1754 | tlli = (*data++) << 28; |
| 1755 | tlli |= (*data++) << 20; |
| 1756 | tlli |= (*data++) << 12; |
| 1757 | tlli |= (*data++) << 4; |
| 1758 | tlli |= (*data++) >> 4; |
| 1759 | |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 1760 | tbf = bts->tbf_by_tlli(tlli, GPRS_RLCMAC_DL_TBF); |
Andreas Eversberg | a9be154 | 2012-09-27 09:23:24 +0200 | [diff] [blame] | 1761 | if (!tbf) { |
| 1762 | LOGP(DRLCMAC, LOGL_ERROR, "Got IMM.ASS confirm, but TLLI=%08x " |
| 1763 | "does not exit\n", tlli); |
| 1764 | return -EINVAL; |
| 1765 | } |
| 1766 | |
| 1767 | LOGP(DRLCMAC, LOGL_DEBUG, "Got IMM.ASS confirm for TLLI=%08x\n", tlli); |
| 1768 | |
| 1769 | if (tbf->dir.dl.wait_confirm) { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1770 | tbf_timer_start(tbf, 0, Tassign_agch); |
| 1771 | } |
Andreas Eversberg | a9be154 | 2012-09-27 09:23:24 +0200 | [diff] [blame] | 1772 | |
| 1773 | return 0; |
| 1774 | } |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 1775 | |