Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 1 | /* Copied from gprs_bssgp_pcu.cpp |
| 2 | * |
| 3 | * Copyright (C) 2012 Ivan Klyuchnikov |
Holger Hans Peter Freyther | 8692128 | 2013-08-24 21:26:42 +0200 | [diff] [blame] | 4 | * Copyright (C) 2012 Andreas Eversberg <jolly@eversberg.eu> |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 5 | * Copyright (C) 2013 by Holger Hans Peter Freyther |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License |
| 9 | * as published by the Free Software Foundation; either version 2 |
| 10 | * of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 20 | */ |
| 21 | |
Holger Hans Peter Freyther | 67ed34e | 2013-10-17 17:01:54 +0200 | [diff] [blame] | 22 | #include <bts.h> |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 23 | #include <tbf.h> |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 24 | #include <rlc.h> |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 25 | #include <encoding.h> |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 26 | #include <gprs_rlcmac.h> |
| 27 | #include <gprs_debug.h> |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 28 | #include <gprs_bssgp_pcu.h> |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 29 | #include <decoding.h> |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 30 | |
| 31 | extern "C" { |
| 32 | #include <osmocom/core/msgb.h> |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 33 | #include <osmocom/core/talloc.h> |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 34 | } |
| 35 | |
| 36 | #include <errno.h> |
| 37 | #include <string.h> |
| 38 | |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 39 | /* After sending these frames, we poll for ack/nack. */ |
| 40 | #define POLL_ACK_AFTER_FRAMES 20 |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 41 | /* After receiving these frames, we send ack/nack. */ |
| 42 | #define SEND_ACK_AFTER_FRAMES 20 |
| 43 | |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 44 | |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 45 | static const struct gprs_rlcmac_cs gprs_rlcmac_cs[] = { |
| 46 | /* frame length data block max payload */ |
| 47 | { 0, 0, 0 }, |
| 48 | { 23, 23, 20 }, /* CS-1 */ |
| 49 | { 34, 33, 30 }, /* CS-2 */ |
| 50 | { 40, 39, 36 }, /* CS-3 */ |
| 51 | { 54, 53, 50 }, /* CS-4 */ |
| 52 | }; |
| 53 | |
Holger Hans Peter Freyther | 1702f10 | 2013-10-20 08:44:02 +0200 | [diff] [blame] | 54 | extern "C" { |
| 55 | int bssgp_tx_llc_discarded(struct bssgp_bvc_ctx *bctx, uint32_t tlli, |
| 56 | uint8_t num_frames, uint32_t num_octets); |
| 57 | } |
| 58 | |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 59 | extern void *tall_pcu_ctx; |
| 60 | |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 61 | static void tbf_timer_cb(void *_tbf); |
| 62 | |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 63 | inline gprs_rlcmac_bts *gprs_rlcmac_tbf::bts_data() const |
| 64 | { |
| 65 | return bts->bts_data(); |
| 66 | } |
| 67 | |
Holger Hans Peter Freyther | d1d114f | 2013-08-24 20:46:18 +0200 | [diff] [blame] | 68 | static inline void tbf_update_ms_class(struct gprs_rlcmac_tbf *tbf, |
| 69 | const uint8_t ms_class) |
| 70 | { |
| 71 | if (!tbf->ms_class && ms_class) |
| 72 | tbf->ms_class = ms_class; |
| 73 | } |
| 74 | |
Holger Hans Peter Freyther | 5464c9b | 2013-10-27 20:57:35 +0100 | [diff] [blame] | 75 | void gprs_rlcmac_tbf::assign_imsi(const char *imsi) |
Holger Hans Peter Freyther | d868928 | 2013-08-24 20:51:06 +0200 | [diff] [blame] | 76 | { |
Holger Hans Peter Freyther | 5464c9b | 2013-10-27 20:57:35 +0100 | [diff] [blame] | 77 | strncpy(m_imsi, imsi, sizeof(m_imsi)); |
| 78 | m_imsi[sizeof(m_imsi) - 1] = '\0'; |
Holger Hans Peter Freyther | d868928 | 2013-08-24 20:51:06 +0200 | [diff] [blame] | 79 | } |
| 80 | |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 81 | static struct gprs_rlcmac_tbf *tbf_lookup_dl(BTS *bts, |
| 82 | const uint32_t tlli, const char *imsi) |
Holger Hans Peter Freyther | 31d0df9 | 2013-08-24 20:42:45 +0200 | [diff] [blame] | 83 | { |
| 84 | /* TODO: look up by IMSI first, then tlli, then old_tlli */ |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 85 | return bts->tbf_by_tlli(tlli, GPRS_RLCMAC_DL_TBF); |
Holger Hans Peter Freyther | 31d0df9 | 2013-08-24 20:42:45 +0200 | [diff] [blame] | 86 | } |
| 87 | |
Holger Hans Peter Freyther | a1da251 | 2013-11-07 07:32:51 +0100 | [diff] [blame] | 88 | int gprs_rlcmac_tbf::append_data(const uint8_t ms_class, |
Holger Hans Peter Freyther | 31d0df9 | 2013-08-24 20:42:45 +0200 | [diff] [blame] | 89 | const uint16_t pdu_delay_csec, |
| 90 | const uint8_t *data, const uint16_t len) |
| 91 | { |
Holger Hans Peter Freyther | a1da251 | 2013-11-07 07:32:51 +0100 | [diff] [blame] | 92 | LOGP(DRLCMAC, LOGL_INFO, "%s append\n", tbf_name(this)); |
| 93 | if (state_is(GPRS_RLCMAC_WAIT_RELEASE)) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 94 | LOGP(DRLCMAC, LOGL_DEBUG, |
| 95 | "%s in WAIT RELEASE state " |
Holger Hans Peter Freyther | a1da251 | 2013-11-07 07:32:51 +0100 | [diff] [blame] | 96 | "(T3193), so reuse TBF\n", tbf_name(this)); |
Holger Hans Peter Freyther | a1da251 | 2013-11-07 07:32:51 +0100 | [diff] [blame] | 97 | tbf_update_ms_class(this, ms_class); |
Holger Hans Peter Freyther | 55cf994 | 2013-11-13 18:15:45 +0100 | [diff] [blame] | 98 | reuse_tbf(data, len); |
Holger Hans Peter Freyther | 31d0df9 | 2013-08-24 20:42:45 +0200 | [diff] [blame] | 99 | } else { |
| 100 | /* the TBF exists, so we must write it in the queue |
| 101 | * we prepend lifetime in front of PDU */ |
| 102 | struct timeval *tv; |
| 103 | struct msgb *llc_msg = msgb_alloc(len + sizeof(*tv), |
| 104 | "llc_pdu_queue"); |
| 105 | if (!llc_msg) |
| 106 | return -ENOMEM; |
| 107 | tv = (struct timeval *)msgb_put(llc_msg, sizeof(*tv)); |
Holger Hans Peter Freyther | fce431c | 2013-11-13 15:17:12 +0100 | [diff] [blame] | 108 | gprs_llc::calc_pdu_lifetime(bts, pdu_delay_csec, tv); |
Holger Hans Peter Freyther | 31d0df9 | 2013-08-24 20:42:45 +0200 | [diff] [blame] | 109 | memcpy(msgb_put(llc_msg, len), data, len); |
Holger Hans Peter Freyther | a1da251 | 2013-11-07 07:32:51 +0100 | [diff] [blame] | 110 | m_llc.enqueue(llc_msg); |
| 111 | tbf_update_ms_class(this, ms_class); |
Holger Hans Peter Freyther | 31d0df9 | 2013-08-24 20:42:45 +0200 | [diff] [blame] | 112 | } |
| 113 | |
| 114 | return 0; |
| 115 | } |
| 116 | |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 117 | static int tbf_new_dl_assignment(struct gprs_rlcmac_bts *bts, |
| 118 | const char *imsi, |
| 119 | const uint32_t tlli, const uint8_t ms_class, |
| 120 | const uint8_t *data, const uint16_t len) |
| 121 | { |
| 122 | uint8_t trx, ta, ss; |
| 123 | int8_t use_trx; |
| 124 | struct gprs_rlcmac_tbf *old_tbf, *tbf; |
| 125 | int8_t tfi; /* must be signed */ |
| 126 | int rc; |
| 127 | |
| 128 | /* check for uplink data, so we copy our informations */ |
Holger Hans Peter Freyther | bb20b2c | 2013-08-24 21:22:16 +0200 | [diff] [blame] | 129 | #warning "Do the same look up for IMSI, TLLI and OLD_TLLI" |
| 130 | #warning "Refactor the below lines... into a new method" |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 131 | tbf = bts->bts->tbf_by_tlli(tlli, GPRS_RLCMAC_UL_TBF); |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 132 | if (tbf && tbf->dir.ul.contention_resolution_done |
| 133 | && !tbf->dir.ul.final_ack_sent) { |
Holger Hans Peter Freyther | ec80f82 | 2013-10-27 13:44:37 +0100 | [diff] [blame] | 134 | use_trx = tbf->trx->trx_no; |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 135 | ta = tbf->ta; |
| 136 | ss = 0; |
| 137 | old_tbf = tbf; |
| 138 | } else { |
| 139 | use_trx = -1; |
| 140 | /* we already have an uplink TBF, so we use that TA */ |
| 141 | if (tbf) |
| 142 | ta = tbf->ta; |
| 143 | else { |
| 144 | /* recall TA */ |
Holger Hans Peter Freyther | 111614a | 2013-10-19 20:04:57 +0200 | [diff] [blame] | 145 | rc = bts->bts->timing_advance()->recall(tlli); |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 146 | if (rc < 0) { |
| 147 | LOGP(DRLCMAC, LOGL_NOTICE, "TA unknown" |
| 148 | ", assuming 0\n"); |
| 149 | ta = 0; |
| 150 | } else |
| 151 | ta = rc; |
| 152 | } |
| 153 | ss = 1; /* PCH assignment only allows one timeslot */ |
| 154 | old_tbf = NULL; |
| 155 | } |
| 156 | |
| 157 | // Create new TBF (any TRX) |
Holger Hans Peter Freyther | bcafdf8 | 2013-08-24 21:13:31 +0200 | [diff] [blame] | 158 | #warning "Copy and paste with alloc_ul_tbf" |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 159 | tfi = bts->bts->tfi_find_free(GPRS_RLCMAC_DL_TBF, &trx, use_trx); |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 160 | if (tfi < 0) { |
| 161 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH resource\n"); |
| 162 | /* FIXME: send reject */ |
| 163 | return -EBUSY; |
| 164 | } |
| 165 | /* set number of downlink slots according to multislot class */ |
| 166 | tbf = tbf_alloc(bts, tbf, GPRS_RLCMAC_DL_TBF, tfi, trx, ms_class, ss); |
| 167 | if (!tbf) { |
Holger Hans Peter Freyther | 90b87ea | 2013-10-27 10:38:31 +0100 | [diff] [blame] | 168 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH resource\n"); |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 169 | /* FIXME: send reject */ |
| 170 | return -EBUSY; |
| 171 | } |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 172 | tbf->m_tlli = tlli; |
| 173 | tbf->m_tlli_valid = 1; |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 174 | tbf->ta = ta; |
| 175 | |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 176 | LOGP(DRLCMAC, LOGL_DEBUG, "%s [DOWNLINK] START\n", tbf_name(tbf)); |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 177 | |
| 178 | /* new TBF, so put first frame */ |
Holger Hans Peter Freyther | 758dc12 | 2013-11-06 20:39:45 +0100 | [diff] [blame] | 179 | tbf->m_llc.put_frame(data, len); |
Holger Hans Peter Freyther | b3d5ee2 | 2013-11-13 16:43:26 +0100 | [diff] [blame] | 180 | tbf->bts->llc_frame_sched(); |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 181 | |
Holger Hans Peter Freyther | 5464c9b | 2013-10-27 20:57:35 +0100 | [diff] [blame] | 182 | /* Store IMSI for later look-up and PCH retransmission */ |
| 183 | tbf->assign_imsi(imsi); |
| 184 | |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 185 | /* trigger downlink assignment and set state to ASSIGN. |
| 186 | * we don't use old_downlink, so the possible uplink is used |
| 187 | * to trigger downlink assignment. if there is no uplink, |
| 188 | * AGCH is used. */ |
Holger Hans Peter Freyther | 24c1a5b | 2013-10-26 20:27:44 +0200 | [diff] [blame] | 189 | tbf->bts->trigger_dl_ass(tbf, old_tbf, imsi); |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 190 | return 0; |
| 191 | } |
| 192 | |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 193 | /** |
| 194 | * TODO: split into unit test-able parts... |
| 195 | */ |
Holger Hans Peter Freyther | a1da251 | 2013-11-07 07:32:51 +0100 | [diff] [blame] | 196 | int gprs_rlcmac_tbf::handle(struct gprs_rlcmac_bts *bts, |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 197 | const uint32_t tlli, const char *imsi, |
Holger Hans Peter Freyther | 31d0df9 | 2013-08-24 20:42:45 +0200 | [diff] [blame] | 198 | const uint8_t ms_class, const uint16_t delay_csec, |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 199 | const uint8_t *data, const uint16_t len) |
| 200 | { |
| 201 | struct gprs_rlcmac_tbf *tbf; |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 202 | |
| 203 | /* check for existing TBF */ |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 204 | tbf = tbf_lookup_dl(bts->bts, tlli, imsi); |
Holger Hans Peter Freyther | 31d0df9 | 2013-08-24 20:42:45 +0200 | [diff] [blame] | 205 | if (tbf) { |
Holger Hans Peter Freyther | a1da251 | 2013-11-07 07:32:51 +0100 | [diff] [blame] | 206 | int rc = tbf->append_data(ms_class, delay_csec, data, len); |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 207 | if (rc >= 0) |
Holger Hans Peter Freyther | 5464c9b | 2013-10-27 20:57:35 +0100 | [diff] [blame] | 208 | tbf->assign_imsi(imsi); |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 209 | return rc; |
| 210 | } |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 211 | |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 212 | return tbf_new_dl_assignment(bts, imsi, tlli, ms_class, data, len); |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 213 | } |
Holger Hans Peter Freyther | 8692128 | 2013-08-24 21:26:42 +0200 | [diff] [blame] | 214 | |
| 215 | struct gprs_rlcmac_tbf *tbf_alloc_ul(struct gprs_rlcmac_bts *bts, |
| 216 | int8_t use_trx, uint8_t ms_class, |
| 217 | uint32_t tlli, uint8_t ta, struct gprs_rlcmac_tbf *dl_tbf) |
| 218 | { |
| 219 | uint8_t trx; |
| 220 | struct gprs_rlcmac_tbf *tbf; |
Holger Hans Peter Freyther | 5697b4c | 2013-11-11 16:22:39 +0100 | [diff] [blame] | 221 | int8_t tfi; /* must be signed */ |
Holger Hans Peter Freyther | 8692128 | 2013-08-24 21:26:42 +0200 | [diff] [blame] | 222 | |
| 223 | #warning "Copy and paste with tbf_new_dl_assignment" |
| 224 | /* create new TBF, use sme TRX as DL TBF */ |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 225 | tfi = bts->bts->tfi_find_free(GPRS_RLCMAC_UL_TBF, &trx, use_trx); |
Holger Hans Peter Freyther | 8692128 | 2013-08-24 21:26:42 +0200 | [diff] [blame] | 226 | if (tfi < 0) { |
Holger Hans Peter Freyther | 90b87ea | 2013-10-27 10:38:31 +0100 | [diff] [blame] | 227 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH resource\n"); |
Holger Hans Peter Freyther | 8692128 | 2013-08-24 21:26:42 +0200 | [diff] [blame] | 228 | /* FIXME: send reject */ |
| 229 | return NULL; |
| 230 | } |
| 231 | /* use multislot class of downlink TBF */ |
| 232 | tbf = tbf_alloc(bts, dl_tbf, GPRS_RLCMAC_UL_TBF, tfi, trx, ms_class, 0); |
| 233 | if (!tbf) { |
Holger Hans Peter Freyther | 90b87ea | 2013-10-27 10:38:31 +0100 | [diff] [blame] | 234 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH resource\n"); |
Holger Hans Peter Freyther | 8692128 | 2013-08-24 21:26:42 +0200 | [diff] [blame] | 235 | /* FIXME: send reject */ |
| 236 | return NULL; |
| 237 | } |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 238 | tbf->m_tlli = tlli; |
| 239 | tbf->m_tlli_valid = 1; /* no contention resolution */ |
Holger Hans Peter Freyther | 8692128 | 2013-08-24 21:26:42 +0200 | [diff] [blame] | 240 | tbf->dir.ul.contention_resolution_done = 1; |
| 241 | tbf->ta = ta; /* use current TA */ |
| 242 | tbf_new_state(tbf, GPRS_RLCMAC_ASSIGN); |
| 243 | tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_PACCH); |
| 244 | tbf_timer_start(tbf, 3169, bts->t3169, 0); |
| 245 | |
| 246 | return tbf; |
| 247 | } |
Holger Hans Peter Freyther | 964ddb6 | 2013-10-16 17:53:23 +0200 | [diff] [blame] | 248 | |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 249 | static void tbf_unlink_pdch(struct gprs_rlcmac_tbf *tbf) |
| 250 | { |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 251 | struct gprs_rlcmac_pdch *pdch; |
| 252 | int ts; |
| 253 | |
| 254 | if (tbf->direction == GPRS_RLCMAC_UL_TBF) { |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 255 | tbf->trx->ul_tbf[tbf->tfi()] = NULL; |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 256 | for (ts = 0; ts < 8; ts++) { |
| 257 | pdch = tbf->pdch[ts]; |
| 258 | if (pdch) |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 259 | pdch->ul_tbf[tbf->tfi()] = NULL; |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 260 | tbf->pdch[ts] = NULL; |
| 261 | } |
| 262 | } else { |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 263 | tbf->trx->dl_tbf[tbf->tfi()] = NULL; |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 264 | for (ts = 0; ts < 8; ts++) { |
| 265 | pdch = tbf->pdch[ts]; |
| 266 | if (pdch) |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 267 | pdch->dl_tbf[tbf->tfi()] = NULL; |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 268 | tbf->pdch[ts] = NULL; |
| 269 | } |
| 270 | } |
| 271 | } |
| 272 | |
| 273 | void tbf_free(struct gprs_rlcmac_tbf *tbf) |
| 274 | { |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 275 | /* Give final measurement report */ |
| 276 | gprs_rlcmac_rssi_rep(tbf); |
| 277 | gprs_rlcmac_lost_rep(tbf); |
| 278 | |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 279 | LOGP(DRLCMAC, LOGL_INFO, "%s free\n", tbf_name(tbf)); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 280 | if (tbf->ul_ass_state != GPRS_RLCMAC_UL_ASS_NONE) |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 281 | LOGP(DRLCMAC, LOGL_ERROR, "%s Software error: Pending uplink " |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 282 | "assignment. This may not happen, because the " |
| 283 | "assignment message never gets transmitted. Please " |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 284 | "be sure not to free in this state. PLEASE FIX!\n", |
| 285 | tbf_name(tbf)); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 286 | if (tbf->dl_ass_state != GPRS_RLCMAC_DL_ASS_NONE) |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 287 | LOGP(DRLCMAC, LOGL_ERROR, "%s Software error: Pending downlink " |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 288 | "assignment. This may not happen, because the " |
| 289 | "assignment message never gets transmitted. Please " |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 290 | "be sure not to free in this state. PLEASE FIX!\n", |
| 291 | tbf_name(tbf)); |
Holger Hans Peter Freyther | 86300bb | 2013-10-26 18:01:35 +0200 | [diff] [blame] | 292 | tbf->stop_timer(); |
Holger Hans Peter Freyther | 782f6dd | 2013-10-26 18:31:51 +0200 | [diff] [blame] | 293 | #warning "TODO: Could/Should generate bssgp_tx_llc_discarded" |
Holger Hans Peter Freyther | 758dc12 | 2013-11-06 20:39:45 +0100 | [diff] [blame] | 294 | tbf->m_llc.clear(tbf->bts); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 295 | tbf_unlink_pdch(tbf); |
| 296 | llist_del(&tbf->list); |
Holger Hans Peter Freyther | 1587764 | 2013-10-27 09:50:15 +0100 | [diff] [blame] | 297 | |
| 298 | if (tbf->direction == GPRS_RLCMAC_UL_TBF) |
| 299 | tbf->bts->tbf_ul_freed(); |
| 300 | else |
| 301 | tbf->bts->tbf_dl_freed(); |
| 302 | |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 303 | LOGP(DRLCMAC, LOGL_DEBUG, "********** TBF ends here **********\n"); |
| 304 | talloc_free(tbf); |
| 305 | } |
| 306 | |
Holger Hans Peter Freyther | aa9c326 | 2013-10-26 17:49:36 +0200 | [diff] [blame] | 307 | int gprs_rlcmac_tbf::update() |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 308 | { |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 309 | struct gprs_rlcmac_tbf *ul_tbf = NULL; |
Holger Hans Peter Freyther | aa9c326 | 2013-10-26 17:49:36 +0200 | [diff] [blame] | 310 | struct gprs_rlcmac_bts *bts_data = bts->bts_data(); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 311 | int rc; |
| 312 | |
| 313 | LOGP(DRLCMAC, LOGL_DEBUG, "********** TBF update **********\n"); |
| 314 | |
Holger Hans Peter Freyther | aa9c326 | 2013-10-26 17:49:36 +0200 | [diff] [blame] | 315 | if (direction != GPRS_RLCMAC_DL_TBF) |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 316 | return -EINVAL; |
| 317 | |
Holger Hans Peter Freyther | aa9c326 | 2013-10-26 17:49:36 +0200 | [diff] [blame] | 318 | if (!ms_class) { |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 319 | LOGP(DRLCMAC, LOGL_DEBUG, "- Cannot update, no class\n"); |
| 320 | return -EINVAL; |
| 321 | } |
| 322 | |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 323 | ul_tbf = bts->tbf_by_tlli(m_tlli, GPRS_RLCMAC_UL_TBF); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 324 | |
Holger Hans Peter Freyther | aa9c326 | 2013-10-26 17:49:36 +0200 | [diff] [blame] | 325 | tbf_unlink_pdch(this); |
| 326 | rc = bts_data->alloc_algorithm(bts_data, ul_tbf, this, bts_data->alloc_algorithm_curst, 0); |
Holger Hans Peter Freyther | 90b87ea | 2013-10-27 10:38:31 +0100 | [diff] [blame] | 327 | /* if no resource */ |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 328 | if (rc < 0) { |
Holger Hans Peter Freyther | 90b87ea | 2013-10-27 10:38:31 +0100 | [diff] [blame] | 329 | LOGP(DRLCMAC, LOGL_ERROR, "No resource after update???\n"); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 330 | return -rc; |
| 331 | } |
| 332 | |
| 333 | return 0; |
| 334 | } |
| 335 | |
| 336 | int tbf_assign_control_ts(struct gprs_rlcmac_tbf *tbf) |
| 337 | { |
| 338 | if (tbf->control_ts == 0xff) |
| 339 | LOGP(DRLCMAC, LOGL_INFO, "- Setting Control TS %d\n", |
| 340 | tbf->first_common_ts); |
| 341 | else if (tbf->control_ts != tbf->first_common_ts) |
| 342 | LOGP(DRLCMAC, LOGL_INFO, "- Changing Control TS %d\n", |
| 343 | tbf->first_common_ts); |
| 344 | tbf->control_ts = tbf->first_common_ts; |
| 345 | |
| 346 | return 0; |
| 347 | } |
| 348 | |
| 349 | static const char *tbf_state_name[] = { |
| 350 | "NULL", |
| 351 | "ASSIGN", |
| 352 | "FLOW", |
| 353 | "FINISHED", |
| 354 | "WAIT RELEASE", |
| 355 | "RELEASING", |
| 356 | }; |
| 357 | |
| 358 | void tbf_new_state(struct gprs_rlcmac_tbf *tbf, |
| 359 | enum gprs_rlcmac_tbf_state state) |
| 360 | { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 361 | LOGP(DRLCMAC, LOGL_DEBUG, "%s changes state from %s to %s\n", |
| 362 | tbf_name(tbf), |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 363 | tbf_state_name[tbf->state], tbf_state_name[state]); |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 364 | tbf->set_state(state); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 365 | } |
| 366 | |
| 367 | void tbf_timer_start(struct gprs_rlcmac_tbf *tbf, unsigned int T, |
| 368 | unsigned int seconds, unsigned int microseconds) |
| 369 | { |
| 370 | if (!osmo_timer_pending(&tbf->timer)) |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 371 | LOGP(DRLCMAC, LOGL_DEBUG, "%s starting timer %u.\n", |
| 372 | tbf_name(tbf), T); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 373 | else |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 374 | LOGP(DRLCMAC, LOGL_DEBUG, "%s restarting timer %u " |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 375 | "while old timer %u pending \n", |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 376 | tbf_name(tbf), T, tbf->T); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 377 | |
| 378 | tbf->T = T; |
| 379 | tbf->num_T_exp = 0; |
| 380 | |
| 381 | /* Tunning timers can be safely re-scheduled. */ |
| 382 | tbf->timer.data = tbf; |
| 383 | tbf->timer.cb = &tbf_timer_cb; |
| 384 | |
| 385 | osmo_timer_schedule(&tbf->timer, seconds, microseconds); |
| 386 | } |
| 387 | |
Holger Hans Peter Freyther | 86300bb | 2013-10-26 18:01:35 +0200 | [diff] [blame] | 388 | void gprs_rlcmac_tbf::stop_t3191() |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 389 | { |
Holger Hans Peter Freyther | 86300bb | 2013-10-26 18:01:35 +0200 | [diff] [blame] | 390 | return stop_timer(); |
| 391 | } |
| 392 | |
| 393 | void gprs_rlcmac_tbf::stop_timer() |
| 394 | { |
| 395 | if (osmo_timer_pending(&timer)) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 396 | LOGP(DRLCMAC, LOGL_DEBUG, "%s stopping timer %u.\n", |
| 397 | tbf_name(this), T); |
Holger Hans Peter Freyther | 86300bb | 2013-10-26 18:01:35 +0200 | [diff] [blame] | 398 | osmo_timer_del(&timer); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 399 | } |
| 400 | } |
| 401 | |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 402 | void gprs_rlcmac_tbf::poll_timeout() |
| 403 | { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 404 | LOGP(DRLCMAC, LOGL_NOTICE, "%s poll timeout\n", |
| 405 | tbf_name(this)); |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 406 | |
| 407 | poll_state = GPRS_RLCMAC_POLL_NONE; |
| 408 | |
| 409 | if (ul_ack_state == GPRS_RLCMAC_UL_ACK_WAIT_ACK) { |
| 410 | if (!(state_flags & (1 << GPRS_RLCMAC_FLAG_TO_UL_ACK))) { |
| 411 | LOGP(DRLCMAC, LOGL_NOTICE, "- Timeout for polling " |
| 412 | "PACKET CONTROL ACK for PACKET UPLINK ACK\n"); |
| 413 | rlcmac_diag(); |
| 414 | state_flags |= (1 << GPRS_RLCMAC_FLAG_TO_UL_ACK); |
| 415 | } |
| 416 | ul_ack_state = GPRS_RLCMAC_UL_ACK_NONE; |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 417 | if (state_is(GPRS_RLCMAC_FINISHED)) { |
| 418 | dir.ul.n3103++; |
| 419 | if (dir.ul.n3103 == bts->bts_data()->n3103) { |
| 420 | LOGP(DRLCMAC, LOGL_NOTICE, |
| 421 | "- N3103 exceeded\n"); |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 422 | tbf_new_state(this, GPRS_RLCMAC_RELEASING); |
| 423 | tbf_timer_start(this, 3169, bts->bts_data()->t3169, 0); |
| 424 | return; |
| 425 | } |
| 426 | /* reschedule UL ack */ |
| 427 | ul_ack_state = GPRS_RLCMAC_UL_ACK_SEND_ACK; |
| 428 | } |
| 429 | } else if (ul_ass_state == GPRS_RLCMAC_UL_ASS_WAIT_ACK) { |
| 430 | if (!(state_flags & (1 << GPRS_RLCMAC_FLAG_TO_UL_ASS))) { |
| 431 | LOGP(DRLCMAC, LOGL_NOTICE, "- Timeout for polling " |
| 432 | "PACKET CONTROL ACK for PACKET UPLINK " |
| 433 | "ASSIGNMENT.\n"); |
| 434 | rlcmac_diag(); |
| 435 | state_flags |= (1 << GPRS_RLCMAC_FLAG_TO_UL_ASS); |
| 436 | } |
| 437 | ul_ass_state = GPRS_RLCMAC_UL_ASS_NONE; |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 438 | n3105++; |
| 439 | if (n3105 == bts_data()->n3105) { |
| 440 | LOGP(DRLCMAC, LOGL_NOTICE, "- N3105 exceeded\n"); |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 441 | tbf_new_state(this, GPRS_RLCMAC_RELEASING); |
| 442 | tbf_timer_start(this, 3195, bts_data()->t3195, 0); |
| 443 | return; |
| 444 | } |
| 445 | /* reschedule UL assignment */ |
| 446 | ul_ass_state = GPRS_RLCMAC_UL_ASS_SEND_ASS; |
| 447 | } else if (dl_ass_state == GPRS_RLCMAC_DL_ASS_WAIT_ACK) { |
| 448 | if (!(state_flags & (1 << GPRS_RLCMAC_FLAG_TO_DL_ASS))) { |
| 449 | LOGP(DRLCMAC, LOGL_NOTICE, "- Timeout for polling " |
| 450 | "PACKET CONTROL ACK for PACKET DOWNLINK " |
| 451 | "ASSIGNMENT.\n"); |
| 452 | rlcmac_diag(); |
| 453 | state_flags |= (1 << GPRS_RLCMAC_FLAG_TO_DL_ASS); |
| 454 | } |
| 455 | dl_ass_state = GPRS_RLCMAC_DL_ASS_NONE; |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 456 | n3105++; |
| 457 | if (n3105 == bts->bts_data()->n3105) { |
| 458 | LOGP(DRLCMAC, LOGL_NOTICE, "- N3105 exceeded\n"); |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 459 | tbf_new_state(this, GPRS_RLCMAC_RELEASING); |
| 460 | tbf_timer_start(this, 3195, bts_data()->t3195, 0); |
| 461 | return; |
| 462 | } |
| 463 | /* reschedule DL assignment */ |
| 464 | dl_ass_state = GPRS_RLCMAC_DL_ASS_SEND_ASS; |
| 465 | } else if (direction == GPRS_RLCMAC_DL_TBF) { |
| 466 | if (!(state_flags & (1 << GPRS_RLCMAC_FLAG_TO_DL_ACK))) { |
| 467 | LOGP(DRLCMAC, LOGL_NOTICE, "- Timeout for polling " |
| 468 | "PACKET DOWNLINK ACK.\n"); |
| 469 | rlcmac_diag(); |
| 470 | state_flags |= (1 << GPRS_RLCMAC_FLAG_TO_DL_ACK); |
| 471 | } |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 472 | n3105++; |
| 473 | if (n3105 == bts->bts_data()->n3105) { |
| 474 | LOGP(DRLCMAC, LOGL_NOTICE, "- N3105 exceeded\n"); |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 475 | tbf_new_state(this, GPRS_RLCMAC_RELEASING); |
| 476 | tbf_timer_start(this, 3195, bts_data()->t3195, 0); |
| 477 | return; |
| 478 | } |
| 479 | /* resend IMM.ASS on CCCH on timeout */ |
| 480 | if ((state_flags & (1 << GPRS_RLCMAC_FLAG_CCCH)) |
| 481 | && !(state_flags & (1 << GPRS_RLCMAC_FLAG_DL_ACK))) { |
| 482 | LOGP(DRLCMAC, LOGL_DEBUG, "Re-send dowlink assignment " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 483 | "for %s on PCH (IMSI=%s)\n", |
| 484 | tbf_name(this), |
Holger Hans Peter Freyther | 5464c9b | 2013-10-27 20:57:35 +0100 | [diff] [blame] | 485 | m_imsi); |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 486 | /* send immediate assignment */ |
Holger Hans Peter Freyther | 5464c9b | 2013-10-27 20:57:35 +0100 | [diff] [blame] | 487 | bts->snd_dl_ass(this, 0, m_imsi); |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 488 | dir.dl.wait_confirm = 1; |
| 489 | } |
| 490 | } else |
| 491 | LOGP(DRLCMAC, LOGL_ERROR, "- Poll Timeout, but no event!\n"); |
| 492 | } |
| 493 | |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 494 | struct gprs_rlcmac_tbf *tbf_alloc(struct gprs_rlcmac_bts *bts, |
| 495 | struct gprs_rlcmac_tbf *old_tbf, enum gprs_rlcmac_tbf_direction dir, |
| 496 | uint8_t tfi, uint8_t trx, |
| 497 | uint8_t ms_class, uint8_t single_slot) |
| 498 | { |
| 499 | struct gprs_rlcmac_tbf *tbf; |
| 500 | int rc; |
| 501 | |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 502 | LOGP(DRLCMAC, LOGL_DEBUG, "********** TBF starts here **********\n"); |
| 503 | LOGP(DRLCMAC, LOGL_INFO, "Allocating %s TBF: TFI=%d TRX=%d " |
| 504 | "MS_CLASS=%d\n", (dir == GPRS_RLCMAC_UL_TBF) ? "UL" : "DL", |
| 505 | tfi, trx, ms_class); |
| 506 | |
| 507 | if (trx >= 8 || tfi >= 32) |
| 508 | return NULL; |
| 509 | |
| 510 | tbf = talloc_zero(tall_pcu_ctx, struct gprs_rlcmac_tbf); |
| 511 | if (!tbf) |
| 512 | return NULL; |
| 513 | |
Holger Hans Peter Freyther | 9f0c1d2 | 2013-10-19 21:24:34 +0200 | [diff] [blame] | 514 | tbf->bts = bts->bts; |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 515 | tbf->direction = dir; |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 516 | tbf->m_tfi = tfi; |
Holger Hans Peter Freyther | 743bafa | 2013-09-29 07:50:50 +0200 | [diff] [blame] | 517 | tbf->trx = &bts->trx[trx]; |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 518 | tbf->ms_class = ms_class; |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 519 | /* select algorithm */ |
| 520 | rc = bts->alloc_algorithm(bts, old_tbf, tbf, bts->alloc_algorithm_curst, |
| 521 | single_slot); |
Holger Hans Peter Freyther | 90b87ea | 2013-10-27 10:38:31 +0100 | [diff] [blame] | 522 | /* if no resource */ |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 523 | if (rc < 0) { |
| 524 | talloc_free(tbf); |
| 525 | return NULL; |
| 526 | } |
| 527 | /* assign control ts */ |
| 528 | tbf->control_ts = 0xff; |
| 529 | rc = tbf_assign_control_ts(tbf); |
Holger Hans Peter Freyther | 90b87ea | 2013-10-27 10:38:31 +0100 | [diff] [blame] | 530 | /* if no resource */ |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 531 | if (rc < 0) { |
| 532 | talloc_free(tbf); |
| 533 | return NULL; |
| 534 | } |
| 535 | |
| 536 | /* set timestamp */ |
| 537 | gettimeofday(&tbf->meas.dl_bw_tv, NULL); |
| 538 | gettimeofday(&tbf->meas.rssi_tv, NULL); |
| 539 | gettimeofday(&tbf->meas.dl_loss_tv, NULL); |
| 540 | |
Holger Hans Peter Freyther | 758dc12 | 2013-11-06 20:39:45 +0100 | [diff] [blame] | 541 | tbf->m_llc.init(); |
Holger Hans Peter Freyther | 1587764 | 2013-10-27 09:50:15 +0100 | [diff] [blame] | 542 | if (dir == GPRS_RLCMAC_UL_TBF) { |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 543 | llist_add(&tbf->list, &bts->ul_tbfs); |
Holger Hans Peter Freyther | 1587764 | 2013-10-27 09:50:15 +0100 | [diff] [blame] | 544 | tbf->bts->tbf_ul_created(); |
| 545 | } else { |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 546 | llist_add(&tbf->list, &bts->dl_tbfs); |
Holger Hans Peter Freyther | 1587764 | 2013-10-27 09:50:15 +0100 | [diff] [blame] | 547 | tbf->bts->tbf_dl_created(); |
| 548 | } |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 549 | |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 550 | return tbf; |
| 551 | } |
| 552 | |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 553 | static void tbf_timer_cb(void *_tbf) |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 554 | { |
| 555 | struct gprs_rlcmac_tbf *tbf = (struct gprs_rlcmac_tbf *)_tbf; |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 556 | tbf->handle_timeout(); |
| 557 | } |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 558 | |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 559 | void gprs_rlcmac_tbf::handle_timeout() |
| 560 | { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 561 | LOGP(DRLCMAC, LOGL_DEBUG, "%s timer %u expired.\n", |
| 562 | tbf_name(this), T); |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 563 | |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 564 | num_T_exp++; |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 565 | |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 566 | switch (T) { |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 567 | case 0: /* assignment */ |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 568 | if ((state_flags & (1 << GPRS_RLCMAC_FLAG_PACCH))) { |
| 569 | if (state_is(GPRS_RLCMAC_ASSIGN)) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 570 | LOGP(DRLCMAC, LOGL_NOTICE, "%s releasing due to " |
| 571 | "PACCH assignment timeout.\n", tbf_name(this)); |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 572 | tbf_free(this); |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 573 | } else |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 574 | LOGP(DRLCMAC, LOGL_ERROR, "Error: %s is not " |
| 575 | "in assign state\n", tbf_name(this)); |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 576 | } |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 577 | if ((state_flags & (1 << GPRS_RLCMAC_FLAG_CCCH))) { |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 578 | /* change state to FLOW, so scheduler will start transmission */ |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 579 | dir.dl.wait_confirm = 0; |
| 580 | if (state_is(GPRS_RLCMAC_ASSIGN)) { |
| 581 | tbf_new_state(this, GPRS_RLCMAC_FLOW); |
| 582 | tbf_assign_control_ts(this); |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 583 | } else |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 584 | LOGP(DRLCMAC, LOGL_NOTICE, "%s Continue flow after " |
| 585 | "IMM.ASS confirm\n", tbf_name(this)); |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 586 | } |
| 587 | break; |
| 588 | case 3169: |
| 589 | case 3191: |
| 590 | case 3195: |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 591 | LOGP(DRLCMAC, LOGL_NOTICE, "%s T%d timeout during " |
| 592 | "transsmission\n", tbf_name(this), T); |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 593 | rlcmac_diag(); |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 594 | /* fall through */ |
| 595 | case 3193: |
Holger Hans Peter Freyther | 8d0e489 | 2013-10-27 12:42:58 +0100 | [diff] [blame] | 596 | LOGP(DRLCMAC, LOGL_DEBUG, |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 597 | "%s will be freed due to timeout\n", tbf_name(this)); |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 598 | /* free TBF */ |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 599 | tbf_free(this); |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 600 | break; |
| 601 | default: |
Holger Hans Peter Freyther | 8d0e489 | 2013-10-27 12:42:58 +0100 | [diff] [blame] | 602 | LOGP(DRLCMAC, LOGL_ERROR, |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 603 | "%s timer expired in unknown mode: %u\n", tbf_name(this), T); |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 604 | } |
| 605 | } |
| 606 | |
| 607 | int gprs_rlcmac_tbf::rlcmac_diag() |
| 608 | { |
| 609 | if ((state_flags & (1 << GPRS_RLCMAC_FLAG_CCCH))) |
| 610 | LOGP(DRLCMAC, LOGL_NOTICE, "- Assignment was on CCCH\n"); |
| 611 | if ((state_flags & (1 << GPRS_RLCMAC_FLAG_PACCH))) |
| 612 | LOGP(DRLCMAC, LOGL_NOTICE, "- Assignment was on PACCH\n"); |
| 613 | if ((state_flags & (1 << GPRS_RLCMAC_FLAG_UL_DATA))) |
| 614 | LOGP(DRLCMAC, LOGL_NOTICE, "- Uplink data was received\n"); |
| 615 | else if (direction == GPRS_RLCMAC_UL_TBF) |
| 616 | LOGP(DRLCMAC, LOGL_NOTICE, "- No uplink data received yet\n"); |
| 617 | if ((state_flags & (1 << GPRS_RLCMAC_FLAG_DL_ACK))) |
| 618 | LOGP(DRLCMAC, LOGL_NOTICE, "- Downlink ACK was received\n"); |
| 619 | else if (direction == GPRS_RLCMAC_DL_TBF) |
| 620 | LOGP(DRLCMAC, LOGL_NOTICE, "- No downlink ACK received yet\n"); |
| 621 | |
| 622 | return 0; |
| 623 | } |
| 624 | |
Holger Hans Peter Freyther | 1702f10 | 2013-10-20 08:44:02 +0200 | [diff] [blame] | 625 | struct msgb *gprs_rlcmac_tbf::llc_dequeue(bssgp_bvc_ctx *bctx) |
| 626 | { |
| 627 | struct msgb *msg; |
| 628 | struct timeval *tv, tv_now; |
| 629 | uint32_t octets = 0, frames = 0; |
| 630 | |
| 631 | gettimeofday(&tv_now, NULL); |
| 632 | |
Holger Hans Peter Freyther | 758dc12 | 2013-11-06 20:39:45 +0100 | [diff] [blame] | 633 | while ((msg = m_llc.dequeue())) { |
Holger Hans Peter Freyther | 1702f10 | 2013-10-20 08:44:02 +0200 | [diff] [blame] | 634 | tv = (struct timeval *)msg->data; |
| 635 | msgb_pull(msg, sizeof(*tv)); |
Holger Hans Peter Freyther | 51e093b | 2013-11-13 15:35:45 +0100 | [diff] [blame] | 636 | |
Holger Hans Peter Freyther | b1302b0 | 2013-11-13 17:15:26 +0100 | [diff] [blame] | 637 | if (gprs_llc::is_frame_expired(&tv_now, tv)) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 638 | LOGP(DRLCMACDL, LOGL_NOTICE, "%s Discarding LLC PDU " |
| 639 | "because lifetime limit reached\n", |
| 640 | tbf_name(this)); |
Holger Hans Peter Freyther | b3d5ee2 | 2013-11-13 16:43:26 +0100 | [diff] [blame] | 641 | bts->llc_timedout_frame(); |
Holger Hans Peter Freyther | 1702f10 | 2013-10-20 08:44:02 +0200 | [diff] [blame] | 642 | frames++; |
| 643 | octets += msg->len; |
| 644 | msgb_free(msg); |
| 645 | continue; |
| 646 | } |
| 647 | break; |
| 648 | } |
| 649 | |
| 650 | if (frames) { |
| 651 | if (frames > 0xff) |
| 652 | frames = 0xff; |
| 653 | if (octets > 0xffffff) |
| 654 | octets = 0xffffff; |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 655 | bssgp_tx_llc_discarded(bctx, m_tlli, frames, octets); |
Holger Hans Peter Freyther | 1702f10 | 2013-10-20 08:44:02 +0200 | [diff] [blame] | 656 | } |
| 657 | |
| 658 | return msg; |
| 659 | } |
| 660 | |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 661 | /* |
| 662 | * Store received block data in LLC message(s) and forward to SGSN |
| 663 | * if complete. |
| 664 | */ |
Holger Hans Peter Freyther | e5dc2a0 | 2013-11-13 20:10:12 +0100 | [diff] [blame] | 665 | int gprs_rlcmac_tbf::assemble_forward_llc(const gprs_rlc_data *_data) |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 666 | { |
Holger Hans Peter Freyther | e5dc2a0 | 2013-11-13 20:10:12 +0100 | [diff] [blame] | 667 | const uint8_t *data = _data->block; |
| 668 | uint8_t len = _data->len; |
| 669 | const struct rlc_ul_header *rh = (const struct rlc_ul_header *) data; |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 670 | uint8_t e, m; |
| 671 | struct rlc_li_field *li; |
| 672 | uint8_t frame_offset[16], offset = 0, chunk; |
| 673 | int i, frames = 0; |
| 674 | |
| 675 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Assembling frames: (len=%d)\n", len); |
| 676 | |
| 677 | data += 3; |
| 678 | len -= 3; |
| 679 | e = rh->e; /* if extended */ |
| 680 | m = 1; /* more frames, that means: the first frame */ |
| 681 | |
| 682 | /* Parse frame offsets from length indicator(s), if any. */ |
| 683 | while (1) { |
| 684 | if (frames == (int)sizeof(frame_offset)) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 685 | LOGP(DRLCMACUL, LOGL_ERROR, "%s too many frames in " |
| 686 | "block\n", tbf_name(this)); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 687 | return -EINVAL; |
| 688 | } |
| 689 | frame_offset[frames++] = offset; |
| 690 | LOGP(DRLCMACUL, LOGL_DEBUG, "-- Frame %d starts at offset " |
| 691 | "%d\n", frames, offset); |
| 692 | if (!len) |
| 693 | break; |
| 694 | /* M == 0 and E == 0 is not allowed in this version. */ |
| 695 | if (!m && !e) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 696 | LOGP(DRLCMACUL, LOGL_NOTICE, "%s UL DATA " |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 697 | "ignored, because M='0' and E='0'.\n", |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 698 | tbf_name(this)); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 699 | return 0; |
| 700 | } |
| 701 | /* no more frames in this segment */ |
| 702 | if (e) { |
| 703 | break; |
| 704 | } |
| 705 | /* There is a new frame and an LI that delimits it. */ |
| 706 | if (m) { |
| 707 | li = (struct rlc_li_field *)data; |
| 708 | LOGP(DRLCMACUL, LOGL_DEBUG, "-- Delimiter len=%d\n", |
| 709 | li->li); |
| 710 | /* Special case: LI == 0 |
| 711 | * If the last segment would fit precisely into the |
| 712 | * rest of the RLC MAC block, there would be no way |
| 713 | * to delimit that this segment ends and is not |
| 714 | * continued in the next block. |
| 715 | * The special LI (0) is used to force the segment to |
| 716 | * extend into the next block, so it is delimited there. |
| 717 | * This LI must be skipped. Also it is the last LI. |
| 718 | */ |
| 719 | if (li->li == 0) { |
| 720 | data++; |
| 721 | len--; |
| 722 | m = 1; /* M is ignored, we know there is more */ |
| 723 | break; /* handle E as '1', so we break! */ |
| 724 | } |
| 725 | e = li->e; |
| 726 | m = li->m; |
| 727 | offset += li->li; |
| 728 | data++; |
| 729 | len--; |
| 730 | continue; |
| 731 | } |
| 732 | } |
| 733 | if (!m) { |
| 734 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Last frame carries spare " |
| 735 | "data\n"); |
| 736 | } |
| 737 | |
| 738 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Data length after length fields: %d\n", |
| 739 | len); |
| 740 | /* TLLI */ |
| 741 | if (rh->ti) { |
| 742 | if (len < 4) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 743 | LOGP(DRLCMACUL, LOGL_NOTICE, "%s UL DATA TLLI out of " |
| 744 | "frame border\n", tbf_name(this)); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 745 | return -EINVAL; |
| 746 | } |
| 747 | data += 4; |
| 748 | len -= 4; |
| 749 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Length after skipping TLLI: " |
| 750 | "%d\n", len); |
| 751 | } |
| 752 | |
| 753 | /* PFI */ |
| 754 | if (rh->pi) { |
| 755 | LOGP(DRLCMACUL, LOGL_ERROR, "ERROR: PFI not supported, " |
| 756 | "please disable in SYSTEM INFORMATION\n"); |
| 757 | if (len < 1) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 758 | LOGP(DRLCMACUL, LOGL_NOTICE, "%s UL DATA PFI out of " |
| 759 | "frame border\n", tbf_name(this)); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 760 | return -EINVAL; |
| 761 | } |
| 762 | data++; |
| 763 | len--; |
| 764 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Length after skipping PFI: " |
| 765 | "%d\n", len); |
| 766 | } |
| 767 | |
| 768 | /* Now we have: |
| 769 | * - a list of frames offsets: frame_offset[] |
| 770 | * - number of frames: i |
| 771 | * - m == 0: Last frame carries spare data (end of TBF). |
| 772 | */ |
| 773 | |
| 774 | /* Check if last offset would exceed frame. */ |
| 775 | if (offset > len) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 776 | LOGP(DRLCMACUL, LOGL_NOTICE, "%s UL DATA ignored, " |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 777 | "because LI delimits data that exceeds block size.\n", |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 778 | tbf_name(this)); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 779 | return -EINVAL; |
| 780 | } |
| 781 | |
| 782 | /* create LLC frames */ |
| 783 | for (i = 0; i < frames; i++) { |
| 784 | /* last frame ? */ |
| 785 | if (i == frames - 1) { |
| 786 | /* no more data in last frame */ |
| 787 | if (!m) |
| 788 | break; |
| 789 | /* data until end of frame */ |
| 790 | chunk = len - frame_offset[i]; |
| 791 | } else { |
| 792 | /* data until next frame */ |
| 793 | chunk = frame_offset[i + 1] - frame_offset[i]; |
| 794 | } |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 795 | if (!m_llc.fits_in_current_frame(chunk)) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 796 | LOGP(DRLCMACUL, LOGL_NOTICE, "%s LLC frame exceeds " |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 797 | "maximum size %u.\n", tbf_name(this), |
| 798 | m_llc.remaining_space()); |
| 799 | chunk = m_llc.remaining_space(); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 800 | } |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 801 | m_llc.append_frame(data + frame_offset[i], chunk); |
| 802 | m_llc.consume(chunk); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 803 | /* not last frame. */ |
| 804 | if (i != frames - 1) { |
| 805 | /* send frame to SGSN */ |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 806 | LOGP(DRLCMACUL, LOGL_INFO, "%s complete UL frame len=%d\n", |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 807 | tbf_name(this) , m_llc.frame_length()); |
Holger Hans Peter Freyther | 9948514 | 2013-11-06 20:08:42 +0100 | [diff] [blame] | 808 | snd_ul_ud(); |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 809 | m_llc.reset(); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 810 | /* also check if CV==0, because the frame may fill up the |
| 811 | * block precisely, then it is also complete. normally the |
| 812 | * frame would be extended into the next block with a 0-length |
| 813 | * delimiter added to this block. */ |
| 814 | } else if (rh->cv == 0) { |
| 815 | /* send frame to SGSN */ |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 816 | LOGP(DRLCMACUL, LOGL_INFO, "%s complete UL frame " |
| 817 | "that fits precisely in last block: " |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 818 | "len=%d\n", tbf_name(this), m_llc.frame_length()); |
Holger Hans Peter Freyther | 9948514 | 2013-11-06 20:08:42 +0100 | [diff] [blame] | 819 | snd_ul_ud(); |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 820 | m_llc.reset(); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 821 | } |
| 822 | } |
| 823 | |
| 824 | return 0; |
| 825 | } |
| 826 | |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 827 | /* |
| 828 | * Create DL data block |
| 829 | * The messages are fragmented and forwarded as data blocks. |
| 830 | */ |
| 831 | struct msgb *gprs_rlcmac_tbf::create_dl_acked_block(uint32_t fn, uint8_t ts) |
| 832 | { |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 833 | LOGP(DRLCMACDL, LOGL_DEBUG, "%s downlink (V(A)==%d .. " |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 834 | "V(S)==%d)\n", tbf_name(this), |
| 835 | dir.dl.window.v_a(), dir.dl.window.v_s()); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 836 | |
| 837 | do_resend: |
| 838 | /* check if there is a block with negative acknowledgement */ |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 839 | int resend_bsn = dir.dl.v_b.resend_needed(dir.dl.window); |
Holger Hans Peter Freyther | 1577779 | 2013-11-24 00:18:47 +0100 | [diff] [blame] | 840 | if (resend_bsn >= 0) { |
| 841 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Resending BSN %d\n", resend_bsn); |
| 842 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 843 | uint16_t index = resend_bsn & dir.dl.window.mod_sns_half(); |
Holger Hans Peter Freyther | 1577779 | 2013-11-24 00:18:47 +0100 | [diff] [blame] | 844 | /* re-send block with negative aknowlegement */ |
| 845 | dir.dl.v_b.mark_unacked(index); |
| 846 | bts->rlc_resent(); |
Holger Hans Peter Freyther | a6ba67c | 2013-11-24 00:44:21 +0100 | [diff] [blame] | 847 | return create_dl_acked_block(fn, ts, index, false); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 848 | } |
| 849 | |
| 850 | /* if the window has stalled, or transfer is complete, |
| 851 | * send an unacknowledged block */ |
Holger Hans Peter Freyther | c03e382 | 2013-11-24 00:21:32 +0100 | [diff] [blame] | 852 | if (state_is(GPRS_RLCMAC_FINISHED) || dl_window_stalled()) { |
Holger Hans Peter Freyther | ef93bdb | 2013-11-24 00:01:50 +0100 | [diff] [blame] | 853 | if (state_is(GPRS_RLCMAC_FINISHED)) { |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 854 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Restarting at BSN %d, " |
| 855 | "because all blocks have been transmitted.\n", |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 856 | dir.dl.window.v_a()); |
Holger Hans Peter Freyther | ef93bdb | 2013-11-24 00:01:50 +0100 | [diff] [blame] | 857 | bts->rlc_restarted(); |
| 858 | } else { |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 859 | LOGP(DRLCMACDL, LOGL_NOTICE, "- Restarting at BSN %d, " |
| 860 | "because all window is stalled.\n", |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 861 | dir.dl.window.v_a()); |
Holger Hans Peter Freyther | c70aae4 | 2013-11-19 17:09:37 +0100 | [diff] [blame] | 862 | bts->rlc_stalled(); |
| 863 | } |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 864 | /* If V(S) == V(A) and finished state, we would have received |
| 865 | * acknowledgement of all transmitted block. In this case we |
| 866 | * would have transmitted the final block, and received ack |
| 867 | * from MS. But in this case we did not receive the final ack |
| 868 | * indication from MS. This should never happen if MS works |
| 869 | * correctly. */ |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 870 | if (dir.dl.window.window_empty()) { |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 871 | LOGP(DRLCMACDL, LOGL_DEBUG, "- MS acked all blocks, " |
| 872 | "so we re-transmit final block!\n"); |
| 873 | /* we just send final block again */ |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 874 | int16_t index = dir.dl.window.v_s_mod_half(-1); |
Holger Hans Peter Freyther | e9429b5 | 2013-11-13 19:36:57 +0100 | [diff] [blame] | 875 | bts->rlc_resent(); |
Holger Hans Peter Freyther | a6ba67c | 2013-11-24 00:44:21 +0100 | [diff] [blame] | 876 | return create_dl_acked_block(fn, ts, index, false); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 877 | } |
| 878 | |
| 879 | /* cycle through all unacked blocks */ |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 880 | int resend = dir.dl.v_b.mark_for_resend(dir.dl.window); |
Holger Hans Peter Freyther | 8b16ae3 | 2013-11-24 00:38:54 +0100 | [diff] [blame] | 881 | |
| 882 | /* At this point there should be at least one unacked block |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 883 | * to be resent. If not, this is an software error. */ |
| 884 | if (resend == 0) { |
| 885 | LOGP(DRLCMACDL, LOGL_ERROR, "Software error: " |
| 886 | "There are no unacknowledged blocks, but V(A) " |
| 887 | " != V(S). PLEASE FIX!\n"); |
| 888 | /* we just send final block again */ |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 889 | int16_t index = dir.dl.window.v_s_mod_half(-1); |
Holger Hans Peter Freyther | e9429b5 | 2013-11-13 19:36:57 +0100 | [diff] [blame] | 890 | bts->rlc_resent(); |
Holger Hans Peter Freyther | a6ba67c | 2013-11-24 00:44:21 +0100 | [diff] [blame] | 891 | return create_dl_acked_block(fn, ts, index, false); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 892 | } |
| 893 | goto do_resend; |
| 894 | } |
| 895 | |
Holger Hans Peter Freyther | a6ba67c | 2013-11-24 00:44:21 +0100 | [diff] [blame] | 896 | return create_new_bsn(fn, ts); |
| 897 | } |
| 898 | |
| 899 | struct msgb *gprs_rlcmac_tbf::create_new_bsn(const uint32_t fn, const uint8_t ts) |
| 900 | { |
| 901 | struct rlc_dl_header *rh; |
| 902 | struct rlc_li_field *li; |
| 903 | struct msgb *msg; |
| 904 | uint16_t index; |
| 905 | uint8_t *delimiter, *data, *e_pointer; |
| 906 | uint16_t space, chunk; |
| 907 | bool first_fin_ack = false; |
| 908 | |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 909 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Sending new block at BSN %d\n", |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 910 | dir.dl.window.v_s()); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 911 | |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 912 | #warning "Selection of the CS doesn't belong here" |
| 913 | if (cs == 0) { |
| 914 | cs = bts_data()->initial_cs_dl; |
| 915 | if (cs < 1 || cs > 4) |
| 916 | cs = 1; |
| 917 | } |
Holger Hans Peter Freyther | 58db60c | 2013-11-13 20:45:40 +0100 | [diff] [blame] | 918 | /* total length of block, including spare bits */ |
| 919 | const uint8_t block_length = gprs_rlcmac_cs[cs].block_length; |
| 920 | /* length of usable data of block, w/o spare bits, inc. MAC */ |
| 921 | const uint8_t block_data_len = gprs_rlcmac_cs[cs].block_data; |
| 922 | |
| 923 | /* now we still have untransmitted LLC data, so we fill mac block */ |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 924 | index = dir.dl.window.v_s_mod_half(0); |
Holger Hans Peter Freyther | 58db60c | 2013-11-13 20:45:40 +0100 | [diff] [blame] | 925 | data = m_rlc.blocks[index].prepare(block_data_len); |
| 926 | |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 927 | rh = (struct rlc_dl_header *)data; |
| 928 | rh->pt = 0; /* Data Block */ |
| 929 | rh->rrbp = rh->s_p = 0; /* Polling, set later, if required */ |
| 930 | rh->usf = 7; /* will be set at scheduler */ |
| 931 | rh->pr = 0; /* FIXME: power reduction */ |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 932 | rh->tfi = m_tfi; /* TFI */ |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 933 | rh->fbi = 0; /* Final Block Indicator, set late, if true */ |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 934 | rh->bsn = dir.dl.window.v_s(); /* Block Sequence Number */ |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 935 | rh->e = 0; /* Extension bit, maybe set later */ |
| 936 | e_pointer = data + 2; /* points to E of current chunk */ |
Holger Hans Peter Freyther | 58db60c | 2013-11-13 20:45:40 +0100 | [diff] [blame] | 937 | data += sizeof(*rh); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 938 | delimiter = data; /* where next length header would be stored */ |
Holger Hans Peter Freyther | 58db60c | 2013-11-13 20:45:40 +0100 | [diff] [blame] | 939 | space = block_data_len - sizeof(*rh); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 940 | while (1) { |
Holger Hans Peter Freyther | acb5427 | 2013-11-07 08:15:58 +0100 | [diff] [blame] | 941 | chunk = m_llc.chunk_size(); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 942 | /* if chunk will exceed block limit */ |
| 943 | if (chunk > space) { |
| 944 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- Chunk with length %d " |
| 945 | "larger than space (%d) left in block: copy " |
| 946 | "only remaining space, and we are done\n", |
| 947 | chunk, space); |
| 948 | /* block is filled, so there is no extension */ |
| 949 | *e_pointer |= 0x01; |
| 950 | /* fill only space */ |
Holger Hans Peter Freyther | acb5427 | 2013-11-07 08:15:58 +0100 | [diff] [blame] | 951 | m_llc.consume(data, space); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 952 | /* return data block as message */ |
| 953 | break; |
| 954 | } |
| 955 | /* if FINAL chunk would fit precisely in space left */ |
Holger Hans Peter Freyther | 28e5378 | 2013-11-06 20:23:56 +0100 | [diff] [blame] | 956 | if (chunk == space && llist_empty(&m_llc.queue)) { |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 957 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- Chunk with length %d " |
| 958 | "would exactly fit into space (%d): because " |
| 959 | "this is a final block, we don't add length " |
| 960 | "header, and we are done\n", chunk, space); |
| 961 | LOGP(DRLCMACDL, LOGL_INFO, "Complete DL frame for " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 962 | "%s that fits precisely in last block: " |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 963 | "len=%d\n", tbf_name(this), m_llc.frame_length()); |
| 964 | gprs_rlcmac_dl_bw(this, m_llc.frame_length()); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 965 | /* block is filled, so there is no extension */ |
| 966 | *e_pointer |= 0x01; |
| 967 | /* fill space */ |
Holger Hans Peter Freyther | acb5427 | 2013-11-07 08:15:58 +0100 | [diff] [blame] | 968 | m_llc.consume(data, space); |
Holger Hans Peter Freyther | 758dc12 | 2013-11-06 20:39:45 +0100 | [diff] [blame] | 969 | m_llc.reset(); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 970 | /* final block */ |
| 971 | rh->fbi = 1; /* we indicate final block */ |
| 972 | tbf_new_state(this, GPRS_RLCMAC_FINISHED); |
| 973 | /* return data block as message */ |
| 974 | break; |
| 975 | } |
| 976 | /* if chunk would fit exactly in space left */ |
| 977 | if (chunk == space) { |
| 978 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- Chunk with length %d " |
| 979 | "would exactly fit into space (%d): add length " |
| 980 | "header with LI=0, to make frame extend to " |
| 981 | "next block, and we are done\n", chunk, space); |
| 982 | /* make space for delimiter */ |
| 983 | if (delimiter != data) |
Daniel Willmann | c3d5325 | 2013-11-13 20:27:21 +0100 | [diff] [blame] | 984 | memmove(delimiter + 1, delimiter, |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 985 | data - delimiter); |
| 986 | data++; |
| 987 | space--; |
| 988 | /* add LI with 0 length */ |
| 989 | li = (struct rlc_li_field *)delimiter; |
| 990 | li->e = 1; /* not more extension */ |
| 991 | li->m = 0; /* shall be set to 0, in case of li = 0 */ |
| 992 | li->li = 0; /* chunk fills the complete space */ |
| 993 | // no need to set e_pointer nor increase delimiter |
| 994 | /* fill only space, which is 1 octet less than chunk */ |
Holger Hans Peter Freyther | acb5427 | 2013-11-07 08:15:58 +0100 | [diff] [blame] | 995 | m_llc.consume(data, space); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 996 | /* return data block as message */ |
| 997 | break; |
| 998 | } |
| 999 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- Chunk with length %d is less " |
| 1000 | "than remaining space (%d): add length header to " |
| 1001 | "to delimit LLC frame\n", chunk, space); |
| 1002 | /* the LLC frame chunk ends in this block */ |
| 1003 | /* make space for delimiter */ |
| 1004 | if (delimiter != data) |
Daniel Willmann | c3d5325 | 2013-11-13 20:27:21 +0100 | [diff] [blame] | 1005 | memmove(delimiter + 1, delimiter, data - delimiter); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1006 | data++; |
| 1007 | space--; |
| 1008 | /* add LI to delimit frame */ |
| 1009 | li = (struct rlc_li_field *)delimiter; |
| 1010 | li->e = 0; /* Extension bit, maybe set later */ |
| 1011 | li->m = 0; /* will be set later, if there is more LLC data */ |
| 1012 | li->li = chunk; /* length of chunk */ |
| 1013 | e_pointer = delimiter; /* points to E of current delimiter */ |
| 1014 | delimiter++; |
Holger Hans Peter Freyther | acb5427 | 2013-11-07 08:15:58 +0100 | [diff] [blame] | 1015 | /* copy (rest of) LLC frame to space and reset later */ |
| 1016 | m_llc.consume(data, chunk); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1017 | data += chunk; |
| 1018 | space -= chunk; |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1019 | LOGP(DRLCMACDL, LOGL_INFO, "Complete DL frame for %s" |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 1020 | "len=%d\n", tbf_name(this), m_llc.frame_length()); |
| 1021 | gprs_rlcmac_dl_bw(this, m_llc.frame_length()); |
Holger Hans Peter Freyther | 758dc12 | 2013-11-06 20:39:45 +0100 | [diff] [blame] | 1022 | m_llc.reset(); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1023 | /* dequeue next LLC frame, if any */ |
| 1024 | msg = llc_dequeue(gprs_bssgp_pcu_current_bctx()); |
| 1025 | if (msg) { |
| 1026 | LOGP(DRLCMACDL, LOGL_INFO, "- Dequeue next LLC for " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1027 | "%s (len=%d)\n", tbf_name(this), msg->len); |
Holger Hans Peter Freyther | 857281f | 2013-11-13 14:56:55 +0100 | [diff] [blame] | 1028 | m_llc.put_frame(msg->data, msg->len); |
Holger Hans Peter Freyther | b3d5ee2 | 2013-11-13 16:43:26 +0100 | [diff] [blame] | 1029 | bts->llc_frame_sched(); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1030 | msgb_free(msg); |
| 1031 | } |
| 1032 | /* if we have more data and we have space left */ |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 1033 | if (space > 0 && m_llc.frame_length()) { |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1034 | li->m = 1; /* we indicate more frames to follow */ |
| 1035 | continue; |
| 1036 | } |
| 1037 | /* if we don't have more LLC frames */ |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 1038 | if (!m_llc.frame_length()) { |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1039 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- Final block, so we " |
| 1040 | "done.\n"); |
| 1041 | li->e = 1; /* we cannot extend */ |
| 1042 | rh->fbi = 1; /* we indicate final block */ |
Holger Hans Peter Freyther | b784046 | 2013-11-07 07:50:26 +0100 | [diff] [blame] | 1043 | first_fin_ack = true; |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1044 | /* + 1 indicates: first final ack */ |
| 1045 | tbf_new_state(this, GPRS_RLCMAC_FINISHED); |
| 1046 | break; |
| 1047 | } |
| 1048 | /* we have no space left */ |
| 1049 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- No space left, so we are " |
| 1050 | "done.\n"); |
| 1051 | li->e = 1; /* we cannot extend */ |
| 1052 | break; |
| 1053 | } |
| 1054 | LOGP(DRLCMACDL, LOGL_DEBUG, "data block: %s\n", |
Holger Hans Peter Freyther | 796270b | 2013-11-13 20:05:00 +0100 | [diff] [blame] | 1055 | osmo_hexdump(m_rlc.blocks[index].block, block_length)); |
Holger Hans Peter Freyther | 58db60c | 2013-11-13 20:45:40 +0100 | [diff] [blame] | 1056 | #warning "move this up?" |
Holger Hans Peter Freyther | 796270b | 2013-11-13 20:05:00 +0100 | [diff] [blame] | 1057 | m_rlc.blocks[index].len = block_length; |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1058 | /* raise send state and set ack state array */ |
Holger Hans Peter Freyther | 321f3c3 | 2013-11-23 16:06:54 +0100 | [diff] [blame] | 1059 | dir.dl.v_b.mark_unacked(index); |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1060 | dir.dl.window.increment_send(); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1061 | |
Holger Hans Peter Freyther | b784046 | 2013-11-07 07:50:26 +0100 | [diff] [blame] | 1062 | return create_dl_acked_block(fn, ts, index, first_fin_ack); |
| 1063 | } |
| 1064 | |
| 1065 | struct msgb *gprs_rlcmac_tbf::create_dl_acked_block( |
| 1066 | const uint32_t fn, const uint8_t ts, |
| 1067 | const int index, const bool first_fin_ack) |
| 1068 | { |
| 1069 | uint8_t *data; |
| 1070 | struct rlc_dl_header *rh; |
| 1071 | struct msgb *dl_msg; |
| 1072 | uint8_t len; |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1073 | |
| 1074 | /* get data and header from current block */ |
Holger Hans Peter Freyther | 796270b | 2013-11-13 20:05:00 +0100 | [diff] [blame] | 1075 | data = m_rlc.blocks[index].block; |
| 1076 | len = m_rlc.blocks[index].len; |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1077 | rh = (struct rlc_dl_header *)data; |
| 1078 | |
| 1079 | /* Clear Polling, if still set in history buffer */ |
| 1080 | rh->s_p = 0; |
| 1081 | |
| 1082 | /* poll after POLL_ACK_AFTER_FRAMES frames, or when final block is tx. |
| 1083 | */ |
| 1084 | if (dir.dl.tx_counter >= POLL_ACK_AFTER_FRAMES || first_fin_ack) { |
| 1085 | if (first_fin_ack) { |
| 1086 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Scheduling Ack/Nack " |
| 1087 | "polling, because first final block sent.\n"); |
| 1088 | } else { |
| 1089 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Scheduling Ack/Nack " |
| 1090 | "polling, because %d blocks sent.\n", |
| 1091 | POLL_ACK_AFTER_FRAMES); |
| 1092 | } |
| 1093 | /* scheduling not possible, because: */ |
| 1094 | if (poll_state != GPRS_RLCMAC_POLL_NONE) |
| 1095 | LOGP(DRLCMAC, LOGL_DEBUG, "Polling is already " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1096 | "sheduled for %s, so we must wait for " |
| 1097 | "requesting downlink ack\n", tbf_name(this)); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1098 | else if (control_ts != ts) |
| 1099 | LOGP(DRLCMAC, LOGL_DEBUG, "Polling cannot be " |
| 1100 | "sheduled in this TS %d, waiting for " |
| 1101 | "TS %d\n", ts, control_ts); |
Holger Hans Peter Freyther | 58db60c | 2013-11-13 20:45:40 +0100 | [diff] [blame] | 1102 | #warning "What happens to the first_fin_ack in case something is already scheduled?" |
Holger Hans Peter Freyther | ec80f82 | 2013-10-27 13:44:37 +0100 | [diff] [blame] | 1103 | else if (bts->sba()->find(trx->trx_no, ts, (fn + 13) % 2715648)) |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1104 | LOGP(DRLCMAC, LOGL_DEBUG, "Polling cannot be " |
| 1105 | "sheduled, because single block alllocation " |
| 1106 | "already exists\n"); |
| 1107 | else { |
| 1108 | LOGP(DRLCMAC, LOGL_DEBUG, "Polling sheduled in this " |
| 1109 | "TS %d\n", ts); |
| 1110 | dir.dl.tx_counter = 0; |
| 1111 | /* start timer whenever we send the final block */ |
| 1112 | if (rh->fbi == 1) |
| 1113 | tbf_timer_start(this, 3191, bts_data()->t3191, 0); |
| 1114 | |
| 1115 | /* schedule polling */ |
| 1116 | poll_state = GPRS_RLCMAC_POLL_SCHED; |
| 1117 | poll_fn = (fn + 13) % 2715648; |
| 1118 | |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1119 | /* set polling in header */ |
| 1120 | rh->rrbp = 0; /* N+13 */ |
| 1121 | rh->s_p = 1; /* Polling */ |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1122 | } |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1123 | } |
| 1124 | |
| 1125 | /* return data block as message */ |
| 1126 | dl_msg = msgb_alloc(len, "rlcmac_dl_data"); |
| 1127 | if (!dl_msg) |
| 1128 | return NULL; |
Holger Hans Peter Freyther | 64b49bc | 2013-11-23 23:16:07 +0100 | [diff] [blame] | 1129 | |
| 1130 | /* Increment TX-counter */ |
| 1131 | dir.dl.tx_counter++; |
| 1132 | |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1133 | memcpy(msgb_put(dl_msg, len), data, len); |
Holger Hans Peter Freyther | e9429b5 | 2013-11-13 19:36:57 +0100 | [diff] [blame] | 1134 | bts->rlc_sent(); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1135 | |
| 1136 | return dl_msg; |
| 1137 | } |
| 1138 | |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1139 | struct msgb *gprs_rlcmac_tbf::create_dl_ass(uint32_t fn) |
| 1140 | { |
| 1141 | struct msgb *msg; |
| 1142 | struct gprs_rlcmac_tbf *new_tbf; |
Holger Hans Peter Freyther | 9977e15 | 2013-11-24 22:52:10 +0100 | [diff] [blame] | 1143 | int poll_ass_dl = 1; |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1144 | |
Holger Hans Peter Freyther | 9977e15 | 2013-11-24 22:52:10 +0100 | [diff] [blame] | 1145 | if (direction == GPRS_RLCMAC_DL_TBF && control_ts != first_common_ts) { |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1146 | LOGP(DRLCMAC, LOGL_NOTICE, "Cannot poll for downlink " |
| 1147 | "assigment, because MS cannot reply. (control TS=%d, " |
| 1148 | "first common TS=%d)\n", control_ts, |
| 1149 | first_common_ts); |
| 1150 | poll_ass_dl = 0; |
| 1151 | } |
| 1152 | if (poll_ass_dl) { |
| 1153 | if (poll_state != GPRS_RLCMAC_POLL_NONE) { |
| 1154 | LOGP(DRLCMAC, LOGL_DEBUG, "Polling is already sheduled " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1155 | "for %s, so we must wait for downlink " |
| 1156 | "assignment...\n", tbf_name(this)); |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1157 | return NULL; |
| 1158 | } |
Holger Hans Peter Freyther | ec80f82 | 2013-10-27 13:44:37 +0100 | [diff] [blame] | 1159 | if (bts->sba()->find(trx->trx_no, control_ts, (fn + 13) % 2715648)) { |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1160 | LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already " |
| 1161 | "scheduled for single block allocation...\n"); |
| 1162 | return NULL; |
| 1163 | } |
| 1164 | } |
| 1165 | |
| 1166 | /* on uplink TBF we get the downlink TBF to be assigned. */ |
| 1167 | if (direction == GPRS_RLCMAC_UL_TBF) { |
| 1168 | /* be sure to check first, if contention resolution is done, |
| 1169 | * otherwise we cannot send the assignment yet */ |
| 1170 | if (!dir.ul.contention_resolution_done) { |
| 1171 | LOGP(DRLCMAC, LOGL_DEBUG, "Cannot assign DL TBF now, " |
| 1172 | "because contention resolution is not " |
| 1173 | "finished.\n"); |
| 1174 | return NULL; |
| 1175 | } |
| 1176 | #warning "THIS should probably go over the IMSI too" |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 1177 | new_tbf = bts->tbf_by_tlli(m_tlli, GPRS_RLCMAC_DL_TBF); |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1178 | } else |
| 1179 | new_tbf = this; |
| 1180 | if (!new_tbf) { |
| 1181 | LOGP(DRLCMACDL, LOGL_ERROR, "We have a schedule for downlink " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1182 | "assignment at uplink %s, but there is no downlink " |
| 1183 | "TBF\n", tbf_name(this)); |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1184 | dl_ass_state = GPRS_RLCMAC_DL_ASS_NONE; |
| 1185 | return NULL; |
| 1186 | } |
| 1187 | |
| 1188 | msg = msgb_alloc(23, "rlcmac_dl_ass"); |
| 1189 | if (!msg) |
| 1190 | return NULL; |
| 1191 | bitvec *ass_vec = bitvec_alloc(23); |
| 1192 | if (!ass_vec) { |
| 1193 | msgb_free(msg); |
| 1194 | return NULL; |
| 1195 | } |
| 1196 | bitvec_unhex(ass_vec, |
| 1197 | "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 1198 | LOGP(DRLCMAC, LOGL_INFO, "%s start Packet Downlink Assignment (PACCH)\n", tbf_name(new_tbf)); |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1199 | RlcMacDownlink_t * mac_control_block = (RlcMacDownlink_t *)talloc_zero(tall_pcu_ctx, RlcMacDownlink_t); |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1200 | Encoding::write_packet_downlink_assignment(mac_control_block, m_tfi, |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1201 | (direction == GPRS_RLCMAC_DL_TBF), new_tbf, |
| 1202 | poll_ass_dl, bts_data()->alpha, bts_data()->gamma, -1, 0); |
| 1203 | LOGP(DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ TX : Packet Downlink Assignment +++++++++++++++++++++++++\n"); |
| 1204 | encode_gsm_rlcmac_downlink(ass_vec, mac_control_block); |
| 1205 | LOGPC(DCSN1, LOGL_NOTICE, "\n"); |
| 1206 | LOGP(DRLCMAC, LOGL_DEBUG, "------------------------- TX : Packet Downlink Assignment -------------------------\n"); |
| 1207 | bitvec_pack(ass_vec, msgb_put(msg, 23)); |
| 1208 | bitvec_free(ass_vec); |
| 1209 | talloc_free(mac_control_block); |
| 1210 | |
| 1211 | if (poll_ass_dl) { |
| 1212 | poll_state = GPRS_RLCMAC_POLL_SCHED; |
| 1213 | poll_fn = (fn + 13) % 2715648; |
| 1214 | dl_ass_state = GPRS_RLCMAC_DL_ASS_WAIT_ACK; |
| 1215 | } else { |
| 1216 | dl_ass_state = GPRS_RLCMAC_DL_ASS_NONE; |
| 1217 | tbf_new_state(new_tbf, GPRS_RLCMAC_FLOW); |
| 1218 | tbf_assign_control_ts(new_tbf); |
| 1219 | /* stop pending assignment timer */ |
| 1220 | new_tbf->stop_timer(); |
| 1221 | |
| 1222 | } |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1223 | |
| 1224 | return msg; |
| 1225 | } |
| 1226 | |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1227 | struct msgb *gprs_rlcmac_tbf::create_ul_ass(uint32_t fn) |
| 1228 | { |
| 1229 | struct msgb *msg; |
| 1230 | struct gprs_rlcmac_tbf *new_tbf; |
| 1231 | |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1232 | if (poll_state != GPRS_RLCMAC_POLL_NONE) { |
| 1233 | LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1234 | "sheduled for %s, so we must wait for uplink " |
| 1235 | "assignment...\n", tbf_name(this)); |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1236 | return NULL; |
| 1237 | } |
Holger Hans Peter Freyther | ec80f82 | 2013-10-27 13:44:37 +0100 | [diff] [blame] | 1238 | if (bts->sba()->find(trx->trx_no, control_ts, (fn + 13) % 2715648)) { |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1239 | LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already scheduled for " |
| 1240 | "single block allocation...\n"); |
| 1241 | return NULL; |
| 1242 | } |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1243 | |
| 1244 | /* on down TBF we get the uplink TBF to be assigned. */ |
| 1245 | #warning "Probably want to find by IMSI too" |
| 1246 | if (direction == GPRS_RLCMAC_DL_TBF) |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 1247 | new_tbf = bts->tbf_by_tlli(m_tlli, GPRS_RLCMAC_UL_TBF); |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1248 | else |
| 1249 | new_tbf = this; |
| 1250 | |
| 1251 | if (!new_tbf) { |
| 1252 | LOGP(DRLCMACUL, LOGL_ERROR, "We have a schedule for uplink " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1253 | "assignment at downlink %s, but there is no uplink " |
| 1254 | "TBF\n", tbf_name(this)); |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1255 | ul_ass_state = GPRS_RLCMAC_UL_ASS_NONE; |
| 1256 | return NULL; |
| 1257 | } |
| 1258 | |
| 1259 | msg = msgb_alloc(23, "rlcmac_ul_ass"); |
| 1260 | if (!msg) |
| 1261 | return NULL; |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 1262 | LOGP(DRLCMAC, LOGL_INFO, "%ss start Packet Uplink Assignment (PACCH)\n", tbf_name(new_tbf)); |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1263 | bitvec *ass_vec = bitvec_alloc(23); |
| 1264 | if (!ass_vec) { |
| 1265 | msgb_free(msg); |
| 1266 | return NULL; |
| 1267 | } |
| 1268 | bitvec_unhex(ass_vec, |
| 1269 | "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1270 | Encoding::write_packet_uplink_assignment(bts_data(), ass_vec, m_tfi, |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 1271 | (direction == GPRS_RLCMAC_DL_TBF), m_tlli, |
Holger Hans Peter Freyther | 9977e15 | 2013-11-24 22:52:10 +0100 | [diff] [blame] | 1272 | m_tlli_valid, new_tbf, 1, bts_data()->alpha, |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1273 | bts_data()->gamma, -1); |
| 1274 | bitvec_pack(ass_vec, msgb_put(msg, 23)); |
| 1275 | RlcMacDownlink_t * mac_control_block = (RlcMacDownlink_t *)talloc_zero(tall_pcu_ctx, RlcMacDownlink_t); |
| 1276 | LOGP(DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ TX : Packet Uplink Assignment +++++++++++++++++++++++++\n"); |
| 1277 | decode_gsm_rlcmac_downlink(ass_vec, mac_control_block); |
| 1278 | LOGPC(DCSN1, LOGL_NOTICE, "\n"); |
| 1279 | LOGP(DRLCMAC, LOGL_DEBUG, "------------------------- TX : Packet Uplink Assignment -------------------------\n"); |
| 1280 | bitvec_free(ass_vec); |
| 1281 | talloc_free(mac_control_block); |
| 1282 | |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1283 | poll_state = GPRS_RLCMAC_POLL_SCHED; |
| 1284 | poll_fn = (fn + 13) % 2715648; |
| 1285 | ul_ass_state = GPRS_RLCMAC_UL_ASS_WAIT_ACK; |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1286 | |
| 1287 | return msg; |
| 1288 | } |
| 1289 | |
Holger Hans Peter Freyther | 46bcb8d | 2013-10-26 21:04:28 +0200 | [diff] [blame] | 1290 | struct msgb *gprs_rlcmac_tbf::create_ul_ack(uint32_t fn) |
| 1291 | { |
| 1292 | int final = (state_is(GPRS_RLCMAC_FINISHED)); |
| 1293 | struct msgb *msg; |
| 1294 | |
| 1295 | if (final) { |
| 1296 | if (poll_state != GPRS_RLCMAC_POLL_NONE) { |
| 1297 | LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1298 | "sheduled for %s, so we must wait for " |
| 1299 | "final uplink ack...\n", tbf_name(this)); |
Holger Hans Peter Freyther | 46bcb8d | 2013-10-26 21:04:28 +0200 | [diff] [blame] | 1300 | return NULL; |
| 1301 | } |
Holger Hans Peter Freyther | ec80f82 | 2013-10-27 13:44:37 +0100 | [diff] [blame] | 1302 | if (bts->sba()->find(trx->trx_no, control_ts, (fn + 13) % 2715648)) { |
Holger Hans Peter Freyther | 46bcb8d | 2013-10-26 21:04:28 +0200 | [diff] [blame] | 1303 | LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already " |
| 1304 | "scheduled for single block allocation...\n"); |
| 1305 | return NULL; |
| 1306 | } |
| 1307 | } |
| 1308 | |
| 1309 | msg = msgb_alloc(23, "rlcmac_ul_ack"); |
| 1310 | if (!msg) |
| 1311 | return NULL; |
| 1312 | bitvec *ack_vec = bitvec_alloc(23); |
| 1313 | if (!ack_vec) { |
| 1314 | msgb_free(msg); |
| 1315 | return NULL; |
| 1316 | } |
| 1317 | bitvec_unhex(ack_vec, |
| 1318 | "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
| 1319 | RlcMacDownlink_t * mac_control_block = (RlcMacDownlink_t *)talloc_zero(tall_pcu_ctx, RlcMacDownlink_t); |
| 1320 | Encoding::write_packet_uplink_ack(bts_data(), mac_control_block, this, final); |
| 1321 | encode_gsm_rlcmac_downlink(ack_vec, mac_control_block); |
| 1322 | bitvec_pack(ack_vec, msgb_put(msg, 23)); |
| 1323 | bitvec_free(ack_vec); |
| 1324 | talloc_free(mac_control_block); |
| 1325 | |
| 1326 | /* now we must set this flag, so we are allowed to assign downlink |
Holger Hans Peter Freyther | 22b3119 | 2013-10-26 21:07:45 +0200 | [diff] [blame] | 1327 | * TBF on PACCH. it is only allowed when TLLI is acknowledged. */ |
Holger Hans Peter Freyther | 46bcb8d | 2013-10-26 21:04:28 +0200 | [diff] [blame] | 1328 | dir.ul.contention_resolution_done = 1; |
| 1329 | |
| 1330 | if (final) { |
| 1331 | poll_state = GPRS_RLCMAC_POLL_SCHED; |
| 1332 | poll_fn = (fn + 13) % 2715648; |
| 1333 | /* waiting for final acknowledge */ |
| 1334 | ul_ack_state = GPRS_RLCMAC_UL_ACK_WAIT_ACK; |
| 1335 | dir.ul.final_ack_sent = 1; |
| 1336 | } else |
| 1337 | ul_ack_state = GPRS_RLCMAC_UL_ACK_NONE; |
Holger Hans Peter Freyther | 46bcb8d | 2013-10-26 21:04:28 +0200 | [diff] [blame] | 1338 | |
| 1339 | return msg; |
| 1340 | } |
| 1341 | |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1342 | int gprs_rlcmac_tbf::update_window(const uint8_t ssn, const uint8_t *rbb) |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1343 | { |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1344 | int16_t dist; /* must be signed */ |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1345 | uint16_t lost = 0, received = 0; |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1346 | char show_rbb[65]; |
| 1347 | char show_v_b[RLC_MAX_SNS + 1]; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1348 | const uint16_t mod_sns = dir.dl.window.mod_sns(); |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1349 | |
| 1350 | Decoding::extract_rbb(rbb, show_rbb); |
| 1351 | /* show received array in debug (bit 64..1) */ |
| 1352 | LOGP(DRLCMACDL, LOGL_DEBUG, "- ack: (BSN=%d)\"%s\"" |
| 1353 | "(BSN=%d) 1=ACK o=NACK\n", (ssn - 64) & mod_sns, |
| 1354 | show_rbb, (ssn - 1) & mod_sns); |
| 1355 | |
| 1356 | /* apply received array to receive state (SSN-64..SSN-1) */ |
| 1357 | /* calculate distance of ssn from V(S) */ |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1358 | dist = (dir.dl.window.v_s() - ssn) & mod_sns; |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1359 | /* check if distance is less than distance V(A)..V(S) */ |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1360 | if (dist >= dir.dl.window.distance()) { |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1361 | /* this might happpen, if the downlink assignment |
| 1362 | * was not received by ms and the ack refers |
| 1363 | * to previous TBF |
| 1364 | * FIXME: we should implement polling for |
| 1365 | * control ack!*/ |
| 1366 | LOGP(DRLCMACDL, LOGL_NOTICE, "- ack range is out of " |
| 1367 | "V(A)..V(S) range %s Free TBF!\n", tbf_name(this)); |
| 1368 | return 1; /* indicate to free TBF */ |
| 1369 | } |
| 1370 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1371 | dir.dl.v_b.update(bts, show_rbb, ssn, dir.dl.window, |
| 1372 | &lost, &received); |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1373 | |
| 1374 | /* report lost and received packets */ |
| 1375 | gprs_rlcmac_received_lost(this, received, lost); |
| 1376 | |
| 1377 | /* raise V(A), if possible */ |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1378 | dir.dl.window.raise(dir.dl.v_b.move_window(dir.dl.window)); |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1379 | |
| 1380 | /* show receive state array in debug (V(A)..V(S)-1) */ |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1381 | dir.dl.v_b.state(show_v_b, dir.dl.window); |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1382 | LOGP(DRLCMACDL, LOGL_DEBUG, "- V(B): (V(A)=%d)\"%s\"" |
| 1383 | "(V(S)-1=%d) A=Acked N=Nacked U=Unacked " |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1384 | "X=Resend-Unacked I=Invalid\n", |
| 1385 | dir.dl.window.v_a(), show_v_b, |
| 1386 | dir.dl.window.v_s_mod(-1)); |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1387 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1388 | if (state_is(GPRS_RLCMAC_FINISHED) && dir.dl.window.window_empty()) { |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1389 | LOGP(DRLCMACDL, LOGL_NOTICE, "Received acknowledge of " |
| 1390 | "all blocks, but without final ack " |
| 1391 | "inidcation (don't worry)\n"); |
| 1392 | } |
| 1393 | return 0; |
| 1394 | } |
| 1395 | |
| 1396 | |
| 1397 | int gprs_rlcmac_tbf::maybe_start_new_window() |
| 1398 | { |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1399 | struct msgb *msg; |
Holger Hans Peter Freyther | 9c5539d | 2013-11-24 17:34:17 +0100 | [diff] [blame] | 1400 | uint16_t received; |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1401 | |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1402 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Final ACK received.\n"); |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1403 | /* range V(A)..V(S)-1 */ |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1404 | received = dir.dl.v_b.count_unacked(dir.dl.window); |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1405 | |
| 1406 | /* report all outstanding packets as received */ |
Holger Hans Peter Freyther | 9c5539d | 2013-11-24 17:34:17 +0100 | [diff] [blame] | 1407 | gprs_rlcmac_received_lost(this, received, 0); |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1408 | |
| 1409 | /* check for LLC PDU in the LLC Queue */ |
| 1410 | msg = llc_dequeue(gprs_bssgp_pcu_current_bctx()); |
| 1411 | if (!msg) { |
| 1412 | /* no message, start T3193, change state to RELEASE */ |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1413 | LOGP(DRLCMACDL, LOGL_DEBUG, "- No new message, so we release.\n"); |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1414 | /* start T3193 */ |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1415 | tbf_timer_start(this, 3193, |
| 1416 | bts_data()->t3193_msec / 1000, |
| 1417 | (bts_data()->t3193_msec % 1000) * 1000); |
| 1418 | tbf_new_state(this, GPRS_RLCMAC_WAIT_RELEASE); |
| 1419 | |
| 1420 | return 0; |
| 1421 | } |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1422 | |
Holger Hans Peter Freyther | 55cf994 | 2013-11-13 18:15:45 +0100 | [diff] [blame] | 1423 | /* we have more data so we will re-use this tbf */ |
| 1424 | reuse_tbf(msg->data, msg->len); |
| 1425 | msgb_free(msg); |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1426 | return 0; |
| 1427 | } |
| 1428 | |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1429 | int gprs_rlcmac_tbf::snd_dl_ack(uint8_t final_ack, uint8_t ssn, uint8_t *rbb) |
| 1430 | { |
| 1431 | LOGP(DRLCMACDL, LOGL_DEBUG, "%s downlink acknowledge\n", tbf_name(this)); |
| 1432 | |
| 1433 | if (!final_ack) |
| 1434 | return update_window(ssn, rbb); |
| 1435 | return maybe_start_new_window(); |
| 1436 | } |
| 1437 | |
Holger Hans Peter Freyther | 964ddb6 | 2013-10-16 17:53:23 +0200 | [diff] [blame] | 1438 | void gprs_rlcmac_tbf::free_all(struct gprs_rlcmac_trx *trx) |
| 1439 | { |
| 1440 | for (uint8_t tfi = 0; tfi < 32; tfi++) { |
| 1441 | struct gprs_rlcmac_tbf *tbf; |
| 1442 | |
| 1443 | tbf = trx->ul_tbf[tfi]; |
| 1444 | if (tbf) |
| 1445 | tbf_free(tbf); |
| 1446 | tbf = trx->dl_tbf[tfi]; |
| 1447 | if (tbf) |
| 1448 | tbf_free(tbf); |
| 1449 | } |
| 1450 | } |
Holger Hans Peter Freyther | 4f6a4e5d | 2013-10-16 17:58:46 +0200 | [diff] [blame] | 1451 | |
| 1452 | void gprs_rlcmac_tbf::free_all(struct gprs_rlcmac_pdch *pdch) |
| 1453 | { |
| 1454 | for (uint8_t tfi = 0; tfi < 32; tfi++) { |
| 1455 | struct gprs_rlcmac_tbf *tbf; |
| 1456 | |
| 1457 | tbf = pdch->ul_tbf[tfi]; |
| 1458 | if (tbf) |
| 1459 | tbf_free(tbf); |
| 1460 | tbf = pdch->dl_tbf[tfi]; |
| 1461 | if (tbf) |
| 1462 | tbf_free(tbf); |
| 1463 | } |
| 1464 | } |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 1465 | |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 1466 | void gprs_rlcmac_tbf::tlli_mark_valid() |
| 1467 | { |
| 1468 | m_tlli_valid = true; |
| 1469 | } |
| 1470 | |
| 1471 | void gprs_rlcmac_tbf::update_tlli(uint32_t tlli) |
| 1472 | { |
| 1473 | if (tlli == m_tlli) |
| 1474 | return; |
| 1475 | |
Holger Hans Peter Freyther | b809866 | 2013-10-30 14:50:17 +0100 | [diff] [blame] | 1476 | bool changedUl = false; |
| 1477 | |
| 1478 | /* |
| 1479 | * During a Routing Area Update (due the assignment of a new |
| 1480 | * P-TMSI) the tlli can change. We notice this when receiving |
| 1481 | * a PACKET CONTROL ACK. |
| 1482 | * When we get a TLLI change on the DL we will look if there |
| 1483 | * is a UL TBF and change the tlli there as well. |
| 1484 | * |
| 1485 | * TODO: There could be multiple DL and UL TBFs and we should |
| 1486 | * have a proper way to link all the related TBFs so we can do |
| 1487 | * a group update. |
| 1488 | */ |
| 1489 | if (m_tlli_valid && direction == GPRS_RLCMAC_DL_TBF) { |
| 1490 | gprs_rlcmac_tbf *ul_tbf; |
| 1491 | ul_tbf = bts->tbf_by_tlli(m_tlli, GPRS_RLCMAC_UL_TBF); |
| 1492 | |
| 1493 | if (ul_tbf) { |
| 1494 | ul_tbf->m_tlli = tlli; |
| 1495 | changedUl = true; |
| 1496 | } |
| 1497 | } |
| 1498 | |
Holger Hans Peter Freyther | bc1626e | 2013-10-30 19:50:49 +0100 | [diff] [blame] | 1499 | /* update the timing advance for the new tlli */ |
| 1500 | bts->timing_advance()->update(m_tlli, tlli, ta); |
| 1501 | |
Holger Hans Peter Freyther | b809866 | 2013-10-30 14:50:17 +0100 | [diff] [blame] | 1502 | LOGP(DRLCMAC, LOGL_NOTICE, |
| 1503 | "%s changing tlli from TLLI=0x%08x TLLI=0x%08x ul_changed=%d\n", |
| 1504 | tbf_name(this), m_tlli, tlli, changedUl); |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 1505 | m_tlli = tlli; |
| 1506 | } |
| 1507 | |
Holger Hans Peter Freyther | 4c06d91 | 2013-11-25 23:05:26 +0100 | [diff] [blame] | 1508 | int gprs_rlcmac_tbf::extract_tlli(const uint8_t *data, const size_t len) |
| 1509 | { |
| 1510 | struct gprs_rlcmac_tbf *dl_tbf, *ul_tbf; |
| 1511 | struct rlc_ul_header *rh = (struct rlc_ul_header *)data; |
| 1512 | uint32_t new_tlli; |
| 1513 | int rc; |
| 1514 | |
| 1515 | /* no TLLI yet */ |
| 1516 | if (!rh->ti) { |
| 1517 | LOGP(DRLCMACUL, LOGL_NOTICE, "UL DATA TFI=%d without " |
| 1518 | "TLLI, but no TLLI received yet\n", rh->tfi); |
| 1519 | return 0; |
| 1520 | } |
| 1521 | rc = Decoding::tlli_from_ul_data(data, len, &new_tlli); |
| 1522 | if (rc) { |
| 1523 | bts->decode_error(); |
| 1524 | LOGP(DRLCMACUL, LOGL_NOTICE, "Failed to decode TLLI " |
| 1525 | "of UL DATA TFI=%d.\n", rh->tfi); |
| 1526 | return 0; |
| 1527 | } |
| 1528 | update_tlli(new_tlli); |
| 1529 | LOGP(DRLCMACUL, LOGL_INFO, "Decoded premier TLLI=0x%08x of " |
| 1530 | "UL DATA TFI=%d.\n", tlli(), rh->tfi); |
| 1531 | if ((dl_tbf = bts->tbf_by_tlli(tlli(), GPRS_RLCMAC_DL_TBF))) { |
| 1532 | LOGP(DRLCMACUL, LOGL_NOTICE, "Got RACH from " |
| 1533 | "TLLI=0x%08x while %s still exists. " |
| 1534 | "Killing pending DL TBF\n", tlli(), |
| 1535 | tbf_name(dl_tbf)); |
| 1536 | tbf_free(dl_tbf); |
| 1537 | } |
| 1538 | /* tbf_by_tlli will not find your TLLI, because it is not |
| 1539 | * yet marked valid */ |
| 1540 | if ((ul_tbf = bts->tbf_by_tlli(tlli(), GPRS_RLCMAC_UL_TBF))) { |
| 1541 | LOGP(DRLCMACUL, LOGL_NOTICE, "Got RACH from " |
| 1542 | "TLLI=0x%08x while %s still exists. " |
| 1543 | "Killing pending UL TBF\n", tlli(), |
| 1544 | tbf_name(ul_tbf)); |
| 1545 | tbf_free(ul_tbf); |
| 1546 | } |
| 1547 | /* mark TLLI valid now */ |
| 1548 | tlli_mark_valid(); |
| 1549 | /* store current timing advance */ |
| 1550 | bts->timing_advance()->remember(tlli(), ta); |
| 1551 | return 1; |
| 1552 | } |
| 1553 | |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1554 | int gprs_rlcmac_tbf::rcv_data_block_acknowledged(const uint8_t *data, size_t len, int8_t rssi) |
| 1555 | { |
Holger Hans Peter Freyther | cbb00eb | 2013-11-25 23:26:06 +0100 | [diff] [blame^] | 1556 | uint16_t index; |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1557 | struct rlc_ul_header *rh = (struct rlc_ul_header *)data; |
| 1558 | int rc; |
| 1559 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1560 | const uint16_t mod_sns = dir.ul.window.mod_sns(); |
| 1561 | const uint16_t mod_sns_half = dir.ul.window.mod_sns_half(); |
| 1562 | const uint16_t ws = dir.ul.window.ws(); |
| 1563 | |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1564 | this->state_flags |= (1 << GPRS_RLCMAC_FLAG_UL_DATA); |
| 1565 | |
| 1566 | LOGP(DRLCMACUL, LOGL_DEBUG, "UL DATA TFI=%d received (V(Q)=%d .. " |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1567 | "V(R)=%d)\n", rh->tfi, this->dir.ul.window.v_q(), |
| 1568 | this->dir.ul.window.v_r()); |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1569 | |
| 1570 | /* process RSSI */ |
| 1571 | gprs_rlcmac_rssi(this, rssi); |
| 1572 | |
| 1573 | /* get TLLI */ |
| 1574 | if (!this->is_tlli_valid()) { |
Holger Hans Peter Freyther | 4c06d91 | 2013-11-25 23:05:26 +0100 | [diff] [blame] | 1575 | if (!extract_tlli(data, len)) |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1576 | return 0; |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1577 | /* already have TLLI, but we stille get another one */ |
| 1578 | } else if (rh->ti) { |
| 1579 | uint32_t tlli; |
| 1580 | rc = Decoding::tlli_from_ul_data(data, len, &tlli); |
| 1581 | if (rc) { |
| 1582 | LOGP(DRLCMACUL, LOGL_NOTICE, "Failed to decode TLLI " |
| 1583 | "of UL DATA TFI=%d.\n", rh->tfi); |
| 1584 | return 0; |
| 1585 | } |
| 1586 | if (tlli != this->tlli()) { |
| 1587 | LOGP(DRLCMACUL, LOGL_NOTICE, "TLLI mismatch on UL " |
| 1588 | "DATA TFI=%d. (Ignoring due to contention " |
| 1589 | "resolution)\n", rh->tfi); |
| 1590 | return 0; |
| 1591 | } |
| 1592 | } |
| 1593 | |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1594 | /* restart T3169 */ |
| 1595 | tbf_timer_start(this, 3169, bts_data()->t3169, 0); |
| 1596 | |
| 1597 | /* Increment RX-counter */ |
| 1598 | this->dir.ul.rx_counter++; |
| 1599 | |
Holger Hans Peter Freyther | 6ab5b24 | 2013-11-24 22:43:03 +0100 | [diff] [blame] | 1600 | if (!dir.ul.window.is_in_window(rh->bsn)) { |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1601 | LOGP(DRLCMACUL, LOGL_DEBUG, "- BSN %d out of window " |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1602 | "%d..%d (it's normal)\n", rh->bsn, |
| 1603 | dir.ul.window.v_q(), |
| 1604 | (dir.ul.window.v_q() + ws - 1) & mod_sns); |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1605 | return 0; |
| 1606 | } |
Holger Hans Peter Freyther | 6ab5b24 | 2013-11-24 22:43:03 +0100 | [diff] [blame] | 1607 | |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1608 | /* Write block to buffer and set receive state array. */ |
| 1609 | index = rh->bsn & mod_sns_half; /* memory index of block */ |
Holger Hans Peter Freyther | 423dd22 | 2013-11-25 23:24:29 +0100 | [diff] [blame] | 1610 | m_rlc.blocks[index].put_data(data, len); |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1611 | LOGP(DRLCMACUL, LOGL_DEBUG, "- BSN %d storing in window (%d..%d)\n", |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1612 | rh->bsn, dir.ul.window.v_q(), |
| 1613 | (dir.ul.window.v_q() + ws - 1) & mod_sns); |
Holger Hans Peter Freyther | 9977e15 | 2013-11-24 22:52:10 +0100 | [diff] [blame] | 1614 | |
Holger Hans Peter Freyther | cbb00eb | 2013-11-25 23:26:06 +0100 | [diff] [blame^] | 1615 | dir.ul.v_n.mark_received(index); |
| 1616 | dir.ul.window.raise(rh->bsn, &dir.ul.v_n); |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1617 | |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1618 | /* Raise V(Q) if possible, and retrieve LLC frames from blocks. |
| 1619 | * This is looped until there is a gap (non received block) or |
| 1620 | * the window is empty.*/ |
Holger Hans Peter Freyther | c15d5cc | 2013-11-24 22:56:53 +0100 | [diff] [blame] | 1621 | while (this->dir.ul.window.v_q() != this->dir.ul.window.v_r()) { |
| 1622 | index = dir.ul.window.v_q() & mod_sns_half; |
| 1623 | if (!dir.ul.v_n.is_received(index)) |
| 1624 | break; |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1625 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Taking block %d out, raising " |
Holger Hans Peter Freyther | c15d5cc | 2013-11-24 22:56:53 +0100 | [diff] [blame] | 1626 | "V(Q) to %d\n", dir.ul.window.v_q(), |
| 1627 | (dir.ul.window.v_q() + 1) & mod_sns); |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1628 | /* get LLC data from block */ |
Holger Hans Peter Freyther | c15d5cc | 2013-11-24 22:56:53 +0100 | [diff] [blame] | 1629 | assemble_forward_llc(&m_rlc.blocks[index]); |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1630 | /* raise V(Q), because block already received */ |
Holger Hans Peter Freyther | c15d5cc | 2013-11-24 22:56:53 +0100 | [diff] [blame] | 1631 | dir.ul.window.increment_q(1); |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1632 | } |
| 1633 | |
| 1634 | /* Check CV of last frame in buffer */ |
| 1635 | if (this->state_is(GPRS_RLCMAC_FLOW) /* still in flow state */ |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1636 | && this->dir.ul.window.v_q() == this->dir.ul.window.v_r()) { /* if complete */ |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1637 | struct rlc_ul_header *last_rh = (struct rlc_ul_header *) |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1638 | m_rlc.blocks[(this->dir.ul.window.v_r() - 1) & mod_sns_half].block; |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1639 | LOGP(DRLCMACUL, LOGL_DEBUG, "- No gaps in received block, " |
| 1640 | "last block: BSN=%d CV=%d\n", last_rh->bsn, |
| 1641 | last_rh->cv); |
| 1642 | if (last_rh->cv == 0) { |
| 1643 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Finished with UL " |
| 1644 | "TBF\n"); |
| 1645 | tbf_new_state(this, GPRS_RLCMAC_FINISHED); |
| 1646 | /* Reset N3103 counter. */ |
| 1647 | this->dir.ul.n3103 = 0; |
| 1648 | } |
| 1649 | } |
| 1650 | |
| 1651 | /* If TLLI is included or if we received half of the window, we send |
| 1652 | * an ack/nack */ |
| 1653 | if (rh->si || rh->ti || this->state_is(GPRS_RLCMAC_FINISHED) |
| 1654 | || (this->dir.ul.rx_counter % SEND_ACK_AFTER_FRAMES) == 0) { |
| 1655 | if (rh->si) { |
| 1656 | LOGP(DRLCMACUL, LOGL_NOTICE, "- Scheduling Ack/Nack, " |
| 1657 | "because MS is stalled.\n"); |
| 1658 | } |
| 1659 | if (rh->ti) { |
| 1660 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Scheduling Ack/Nack, " |
| 1661 | "because TLLI is included.\n"); |
| 1662 | } |
| 1663 | if (this->state_is(GPRS_RLCMAC_FINISHED)) { |
| 1664 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Scheduling Ack/Nack, " |
| 1665 | "because last block has CV==0.\n"); |
| 1666 | } |
| 1667 | if ((this->dir.ul.rx_counter % SEND_ACK_AFTER_FRAMES) == 0) { |
| 1668 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Scheduling Ack/Nack, " |
| 1669 | "because %d frames received.\n", |
| 1670 | SEND_ACK_AFTER_FRAMES); |
| 1671 | } |
| 1672 | if (this->ul_ack_state == GPRS_RLCMAC_UL_ACK_NONE) { |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1673 | /* trigger sending at next RTS */ |
| 1674 | this->ul_ack_state = GPRS_RLCMAC_UL_ACK_SEND_ACK; |
| 1675 | } else { |
| 1676 | /* already triggered */ |
| 1677 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Sending Ack/Nack is " |
| 1678 | "already triggered, don't schedule!\n"); |
| 1679 | } |
| 1680 | } |
| 1681 | |
| 1682 | return 0; |
| 1683 | } |
| 1684 | |
Holger Hans Peter Freyther | 9948514 | 2013-11-06 20:08:42 +0100 | [diff] [blame] | 1685 | /* Send Uplink unit-data to SGSN. */ |
| 1686 | int gprs_rlcmac_tbf::snd_ul_ud() |
| 1687 | { |
| 1688 | uint8_t qos_profile[3]; |
| 1689 | struct msgb *llc_pdu; |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 1690 | unsigned msg_len = NS_HDR_LEN + BSSGP_HDR_LEN + m_llc.frame_length(); |
Holger Hans Peter Freyther | 9948514 | 2013-11-06 20:08:42 +0100 | [diff] [blame] | 1691 | struct bssgp_bvc_ctx *bctx = gprs_bssgp_pcu_current_bctx(); |
| 1692 | |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 1693 | LOGP(DBSSGP, LOGL_INFO, "LLC [PCU -> SGSN] %s len=%d\n", tbf_name(this), m_llc.frame_length()); |
Holger Hans Peter Freyther | 9948514 | 2013-11-06 20:08:42 +0100 | [diff] [blame] | 1694 | if (!bctx) { |
| 1695 | LOGP(DBSSGP, LOGL_ERROR, "No bctx\n"); |
Holger Hans Peter Freyther | 758dc12 | 2013-11-06 20:39:45 +0100 | [diff] [blame] | 1696 | m_llc.reset_frame_space(); |
Holger Hans Peter Freyther | 9948514 | 2013-11-06 20:08:42 +0100 | [diff] [blame] | 1697 | return -EIO; |
| 1698 | } |
| 1699 | |
| 1700 | llc_pdu = msgb_alloc_headroom(msg_len, msg_len,"llc_pdu"); |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 1701 | uint8_t *buf = msgb_push(llc_pdu, TL16V_GROSS_LEN(sizeof(uint8_t)*m_llc.frame_length())); |
| 1702 | tl16v_put(buf, BSSGP_IE_LLC_PDU, sizeof(uint8_t)*m_llc.frame_length(), m_llc.frame); |
Holger Hans Peter Freyther | 9948514 | 2013-11-06 20:08:42 +0100 | [diff] [blame] | 1703 | qos_profile[0] = QOS_PROFILE >> 16; |
| 1704 | qos_profile[1] = QOS_PROFILE >> 8; |
| 1705 | qos_profile[2] = QOS_PROFILE; |
| 1706 | bssgp_tx_ul_ud(bctx, tlli(), qos_profile, llc_pdu); |
| 1707 | |
Holger Hans Peter Freyther | 758dc12 | 2013-11-06 20:39:45 +0100 | [diff] [blame] | 1708 | m_llc.reset_frame_space(); |
Holger Hans Peter Freyther | 9948514 | 2013-11-06 20:08:42 +0100 | [diff] [blame] | 1709 | return 0; |
| 1710 | } |
| 1711 | |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 1712 | const char *tbf_name(gprs_rlcmac_tbf *tbf) |
| 1713 | { |
| 1714 | static char buf[40]; |
| 1715 | snprintf(buf, sizeof(buf), "TBF(TFI=%d TLLI=0x%08x DIR=%s)", |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1716 | tbf->m_tfi, tbf->m_tlli, |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 1717 | tbf->direction == GPRS_RLCMAC_UL_TBF ? "UL" : "DL"); |
| 1718 | buf[sizeof(buf) - 1] = '\0'; |
| 1719 | return buf; |
| 1720 | } |
Holger Hans Peter Freyther | 758dc12 | 2013-11-06 20:39:45 +0100 | [diff] [blame] | 1721 | |
Holger Hans Peter Freyther | 55cf994 | 2013-11-13 18:15:45 +0100 | [diff] [blame] | 1722 | |
| 1723 | void gprs_rlcmac_tbf::reuse_tbf(const uint8_t *data, const uint16_t len) |
| 1724 | { |
| 1725 | bts->tbf_reused(); |
| 1726 | m_llc.put_frame(data, len); |
| 1727 | bts->llc_frame_sched(); |
| 1728 | |
| 1729 | /* reset rlc states */ |
| 1730 | memset(&dir.dl, 0, sizeof(dir.dl)); |
Holger Hans Peter Freyther | 321f3c3 | 2013-11-23 16:06:54 +0100 | [diff] [blame] | 1731 | dir.dl.v_b.reset(); |
Holger Hans Peter Freyther | 55cf994 | 2013-11-13 18:15:45 +0100 | [diff] [blame] | 1732 | |
| 1733 | /* keep to flags */ |
| 1734 | state_flags &= GPRS_RLCMAC_FLAG_TO_MASK; |
| 1735 | state_flags &= ~(1 << GPRS_RLCMAC_FLAG_CCCH); |
| 1736 | |
| 1737 | update(); |
| 1738 | |
| 1739 | LOGP(DRLCMAC, LOGL_DEBUG, "%s Trigger dowlink assignment on PACCH, " |
| 1740 | "because another LLC PDU has arrived in between\n", |
| 1741 | tbf_name(this)); |
| 1742 | bts->trigger_dl_ass(this, this, NULL); |
| 1743 | } |
Holger Hans Peter Freyther | c03e382 | 2013-11-24 00:21:32 +0100 | [diff] [blame] | 1744 | |
| 1745 | bool gprs_rlcmac_tbf::dl_window_stalled() const |
| 1746 | { |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1747 | return dir.dl.window.window_stalled(); |
Holger Hans Peter Freyther | c03e382 | 2013-11-24 00:21:32 +0100 | [diff] [blame] | 1748 | } |