Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 1 | /* Data block transfer |
| 2 | * |
| 3 | * Copyright (C) 2012 Ivan Klyuchnikov |
| 4 | * Copyright (C) 2012 Andreas Eversberg <jolly@eversberg.eu> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version 2 |
| 9 | * of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 19 | */ |
| 20 | |
| 21 | #include <gprs_bssgp_pcu.h> |
| 22 | #include <gprs_rlcmac.h> |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 23 | #include <pcu_l1_if.h> |
Holger Hans Peter Freyther | 67ed34e | 2013-10-17 17:01:54 +0200 | [diff] [blame] | 24 | #include <bts.h> |
Holger Hans Peter Freyther | 63f29d6 | 2013-10-19 19:04:03 +0200 | [diff] [blame] | 25 | #include <encoding.h> |
Holger Hans Peter Freyther | 8692128 | 2013-08-24 21:26:42 +0200 | [diff] [blame] | 26 | #include <tbf.h> |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 27 | #include <rlc.h> |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 28 | |
Holger Hans Peter Freyther | 7ce21eb | 2013-10-20 08:28:25 +0200 | [diff] [blame] | 29 | static struct gprs_rlcmac_cs gprs_rlcmac_cs[] = { |
| 30 | /* frame length data block max payload */ |
| 31 | { 0, 0, 0 }, |
| 32 | { 23, 23, 20 }, /* CS-1 */ |
| 33 | { 34, 33, 30 }, /* CS-2 */ |
| 34 | { 40, 39, 36 }, /* CS-3 */ |
| 35 | { 54, 53, 50 }, /* CS-4 */ |
| 36 | }; |
| 37 | |
| 38 | |
Andreas Eversberg | 6681bb8 | 2012-07-25 08:48:44 +0200 | [diff] [blame] | 39 | extern void *tall_pcu_ctx; |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 40 | |
Andreas Eversberg | f54a89e | 2012-07-16 11:56:11 +0200 | [diff] [blame] | 41 | /* After sending these frames, we poll for ack/nack. */ |
Andreas Eversberg | 5f14bd9 | 2012-10-03 14:20:26 +0200 | [diff] [blame] | 42 | #define POLL_ACK_AFTER_FRAMES 20 |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 43 | |
Andreas Eversberg | 802bb6e | 2012-08-06 11:15:05 +0200 | [diff] [blame] | 44 | /* If acknowledgement to uplink/downlink assignmentshould be polled */ |
Andreas Eversberg | 802bb6e | 2012-08-06 11:15:05 +0200 | [diff] [blame] | 45 | #define POLLING_ASSIGNMENT_UL 1 |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 46 | |
Andreas Eversberg | 66690dd | 2012-06-27 15:44:31 +0200 | [diff] [blame] | 47 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 48 | /* |
| 49 | * UL data block flow |
| 50 | */ |
| 51 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 52 | struct msgb *gprs_rlcmac_send_packet_uplink_assignment( |
| 53 | struct gprs_rlcmac_tbf *tbf, uint32_t fn) |
| 54 | { |
| 55 | struct msgb *msg; |
| 56 | struct gprs_rlcmac_tbf *new_tbf; |
Holger Hans Peter Freyther | b65e08a | 2013-10-20 17:10:25 +0200 | [diff] [blame] | 57 | gprs_rlcmac_bts *bts = tbf->bts->bts_data(); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 58 | |
Andreas Eversberg | 802bb6e | 2012-08-06 11:15:05 +0200 | [diff] [blame] | 59 | #if POLLING_ASSIGNMENT_UL == 1 |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 60 | if (tbf->poll_state != GPRS_RLCMAC_POLL_NONE) { |
| 61 | LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already " |
| 62 | "sheduled for TBF=%d, so we must wait for uplink " |
| 63 | "assignment...\n", tbf->tfi); |
| 64 | return NULL; |
| 65 | } |
Holger Hans Peter Freyther | b65e08a | 2013-10-20 17:10:25 +0200 | [diff] [blame] | 66 | if (tbf->bts->sba()->find(tbf->trx_no, tbf->control_ts, (fn + 13) % 2715648)) { |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 67 | LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already scheduled for " |
| 68 | "single block allocation...\n"); |
| 69 | return NULL; |
| 70 | } |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 71 | #endif |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 72 | |
| 73 | /* on down TBF we get the uplink TBF to be assigned. */ |
| 74 | if (tbf->direction == GPRS_RLCMAC_DL_TBF) |
Holger Hans Peter Freyther | b65e08a | 2013-10-20 17:10:25 +0200 | [diff] [blame] | 75 | new_tbf = tbf->bts->tbf_by_tlli(tbf->tlli, GPRS_RLCMAC_UL_TBF); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 76 | else |
| 77 | new_tbf = tbf; |
| 78 | |
| 79 | if (!new_tbf) { |
| 80 | LOGP(DRLCMACUL, LOGL_ERROR, "We have a schedule for uplink " |
| 81 | "assignment at downlink TBF=%d, but there is no uplink " |
| 82 | "TBF\n", tbf->tfi); |
| 83 | tbf->ul_ass_state = GPRS_RLCMAC_UL_ASS_NONE; |
| 84 | return NULL; |
| 85 | } |
| 86 | |
| 87 | msg = msgb_alloc(23, "rlcmac_ul_ass"); |
| 88 | if (!msg) |
| 89 | return NULL; |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 90 | LOGP(DRLCMAC, LOGL_INFO, "TBF: START TFI: %u TLLI: 0x%08x Packet Uplink Assignment (PACCH)\n", new_tbf->tfi, new_tbf->tlli); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 91 | bitvec *ass_vec = bitvec_alloc(23); |
| 92 | if (!ass_vec) { |
| 93 | msgb_free(msg); |
| 94 | return NULL; |
| 95 | } |
| 96 | bitvec_unhex(ass_vec, |
| 97 | "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
Holger Hans Peter Freyther | 63f29d6 | 2013-10-19 19:04:03 +0200 | [diff] [blame] | 98 | Encoding::write_packet_uplink_assignment(bts, ass_vec, tbf->tfi, |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 99 | (tbf->direction == GPRS_RLCMAC_DL_TBF), tbf->tlli, |
Andreas Eversberg | aafcbbb | 2012-09-27 09:20:45 +0200 | [diff] [blame] | 100 | tbf->tlli_valid, new_tbf, POLLING_ASSIGNMENT_UL, bts->alpha, |
Andreas Eversberg | afdd9e1 | 2012-10-07 17:08:55 +0200 | [diff] [blame] | 101 | bts->gamma, -1); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 102 | bitvec_pack(ass_vec, msgb_put(msg, 23)); |
Andreas Eversberg | 6681bb8 | 2012-07-25 08:48:44 +0200 | [diff] [blame] | 103 | RlcMacDownlink_t * mac_control_block = (RlcMacDownlink_t *)talloc_zero(tall_pcu_ctx, RlcMacDownlink_t); |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 104 | LOGP(DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ TX : Packet Uplink Assignment +++++++++++++++++++++++++\n"); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 105 | decode_gsm_rlcmac_downlink(ass_vec, mac_control_block); |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 106 | LOGPC(DCSN1, LOGL_NOTICE, "\n"); |
| 107 | LOGP(DRLCMAC, LOGL_DEBUG, "------------------------- TX : Packet Uplink Assignment -------------------------\n"); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 108 | bitvec_free(ass_vec); |
Andreas Eversberg | 6681bb8 | 2012-07-25 08:48:44 +0200 | [diff] [blame] | 109 | talloc_free(mac_control_block); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 110 | |
Andreas Eversberg | 802bb6e | 2012-08-06 11:15:05 +0200 | [diff] [blame] | 111 | #if POLLING_ASSIGNMENT_UL == 1 |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 112 | tbf->poll_state = GPRS_RLCMAC_POLL_SCHED; |
| 113 | tbf->poll_fn = (fn + 13) % 2715648; |
| 114 | tbf->ul_ass_state = GPRS_RLCMAC_UL_ASS_WAIT_ACK; |
| 115 | #else |
| 116 | tbf->ul_ass_state = GPRS_RLCMAC_UL_ASS_NONE; |
Andreas Eversberg | 642c7d3 | 2012-07-23 17:58:55 +0200 | [diff] [blame] | 117 | tbf_new_state(new_tbf, GPRS_RLCMAC_FLOW); |
| 118 | tbf_assign_control_ts(new_tbf); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 119 | #endif |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 120 | debug_diagram(bts->bts, tbf->diag, "send UL-ASS"); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 121 | |
| 122 | return msg; |
| 123 | } |
| 124 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 125 | /* send DL data block |
| 126 | * |
| 127 | * The messages are fragmented and forwarded as data blocks. |
| 128 | */ |
| 129 | struct msgb *gprs_rlcmac_send_data_block_acknowledged( |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 130 | struct gprs_rlcmac_tbf *tbf, uint32_t fn, uint8_t ts) |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 131 | { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 132 | struct rlc_dl_header *rh; |
| 133 | struct rlc_li_field *li; |
| 134 | uint8_t block_length; /* total length of block, including spare bits */ |
| 135 | uint8_t block_data; /* usable data of block, w/o spare bits, inc. MAC */ |
| 136 | struct msgb *msg, *dl_msg; |
| 137 | uint8_t bsn; |
| 138 | uint16_t mod_sns = tbf->sns - 1; |
| 139 | uint16_t mod_sns_half = (tbf->sns >> 1) - 1; |
| 140 | uint16_t index; |
| 141 | uint8_t *delimiter, *data, *e_pointer; |
| 142 | uint8_t len; |
| 143 | uint16_t space, chunk; |
Andreas Eversberg | 0c9b50c | 2012-10-07 15:50:51 +0200 | [diff] [blame] | 144 | int first_fin_ack = 0; |
Holger Hans Peter Freyther | b65e08a | 2013-10-20 17:10:25 +0200 | [diff] [blame] | 145 | gprs_rlcmac_bts *bts = tbf->bts->bts_data(); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 146 | |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 147 | LOGP(DRLCMACDL, LOGL_DEBUG, "DL DATA TBF=%d downlink (V(A)==%d .. " |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 148 | "V(S)==%d)\n", tbf->tfi, tbf->dir.dl.v_a, tbf->dir.dl.v_s); |
| 149 | |
| 150 | do_resend: |
| 151 | /* check if there is a block with negative acknowledgement */ |
| 152 | for (bsn = tbf->dir.dl.v_a; bsn != tbf->dir.dl.v_s; |
| 153 | bsn = (bsn + 1) & mod_sns) { |
| 154 | index = (bsn & mod_sns_half); |
| 155 | if (tbf->dir.dl.v_b[index] == 'N' |
| 156 | || tbf->dir.dl.v_b[index] == 'X') { |
| 157 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Resending BSN %d\n", |
| 158 | bsn); |
| 159 | /* re-send block with negative aknowlegement */ |
| 160 | tbf->dir.dl.v_b[index] = 'U'; /* unacked */ |
| 161 | goto tx_block; |
| 162 | } |
| 163 | } |
| 164 | |
| 165 | /* if the window has stalled, or transfer is complete, |
| 166 | * send an unacknowledged block */ |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 167 | if (tbf->state_is(GPRS_RLCMAC_FINISHED) |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 168 | || ((tbf->dir.dl.v_s - tbf->dir.dl.v_a) & mod_sns) == tbf->ws) { |
| 169 | int resend = 0; |
| 170 | |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 171 | if (tbf->state_is(GPRS_RLCMAC_FINISHED)) |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 172 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Restarting at BSN %d, " |
| 173 | "because all blocks have been transmitted.\n", |
| 174 | tbf->dir.dl.v_a); |
| 175 | else |
Andreas Eversberg | 4b470ff | 2012-07-16 12:02:40 +0200 | [diff] [blame] | 176 | LOGP(DRLCMACDL, LOGL_NOTICE, "- Restarting at BSN %d, " |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 177 | "because all window is stalled.\n", |
| 178 | tbf->dir.dl.v_a); |
| 179 | /* If V(S) == V(A) and finished state, we would have received |
| 180 | * acknowledgement of all transmitted block. In this case we |
| 181 | * would have transmitted the final block, and received ack |
| 182 | * from MS. But in this case we did not receive the final ack |
| 183 | * indication from MS. This should never happen if MS works |
| 184 | * correctly. */ |
| 185 | if (tbf->dir.dl.v_s == tbf->dir.dl.v_a) { |
Andreas Eversberg | 0c9b50c | 2012-10-07 15:50:51 +0200 | [diff] [blame] | 186 | LOGP(DRLCMACDL, LOGL_DEBUG, "- MS acked all blocks, " |
| 187 | "so we re-transmit final block!\n"); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 188 | /* we just send final block again */ |
| 189 | index = ((tbf->dir.dl.v_s - 1) & mod_sns_half); |
| 190 | goto tx_block; |
| 191 | } |
| 192 | |
| 193 | /* cycle through all unacked blocks */ |
| 194 | for (bsn = tbf->dir.dl.v_a; bsn != tbf->dir.dl.v_s; |
| 195 | bsn = (bsn + 1) & mod_sns) { |
| 196 | index = (bsn & mod_sns_half); |
| 197 | if (tbf->dir.dl.v_b[index] == 'U') { |
| 198 | /* mark to be re-send */ |
| 199 | tbf->dir.dl.v_b[index] = 'X'; |
| 200 | resend++; |
| 201 | } |
| 202 | } |
| 203 | /* At this point there should be at leasst one unacked block |
| 204 | * to be resent. If not, this is an software error. */ |
| 205 | if (resend == 0) { |
| 206 | LOGP(DRLCMACDL, LOGL_ERROR, "Software error: " |
| 207 | "There are no unacknowledged blocks, but V(A) " |
| 208 | " != V(S). PLEASE FIX!\n"); |
| 209 | /* we just send final block again */ |
| 210 | index = ((tbf->dir.dl.v_s - 1) & mod_sns_half); |
| 211 | goto tx_block; |
| 212 | } |
| 213 | goto do_resend; |
| 214 | } |
| 215 | |
| 216 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Sending new block at BSN %d\n", |
| 217 | tbf->dir.dl.v_s); |
| 218 | |
| 219 | /* now we still have untransmitted LLC data, so we fill mac block */ |
| 220 | index = tbf->dir.dl.v_s & mod_sns_half; |
| 221 | data = tbf->rlc_block[index]; |
Holger Hans Peter Freyther | b65e08a | 2013-10-20 17:10:25 +0200 | [diff] [blame] | 222 | #warning "Selection of the CS doesn't belong here" |
Andreas Eversberg | 3b1332c | 2012-10-03 14:20:53 +0200 | [diff] [blame] | 223 | if (tbf->cs == 0) { |
Andreas Eversberg | 499ff41 | 2012-10-03 14:21:36 +0200 | [diff] [blame] | 224 | tbf->cs = bts->initial_cs_dl; |
Andreas Eversberg | 3b1332c | 2012-10-03 14:20:53 +0200 | [diff] [blame] | 225 | if (tbf->cs < 1 || tbf->cs > 4) |
| 226 | tbf->cs = 1; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 227 | } |
Andreas Eversberg | 3b1332c | 2012-10-03 14:20:53 +0200 | [diff] [blame] | 228 | block_length = gprs_rlcmac_cs[tbf->cs].block_length; |
| 229 | block_data = gprs_rlcmac_cs[tbf->cs].block_data; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 230 | memset(data, 0x2b, block_data); /* spare bits will be left 0 */ |
| 231 | rh = (struct rlc_dl_header *)data; |
| 232 | rh->pt = 0; /* Data Block */ |
| 233 | rh->rrbp = rh->s_p = 0; /* Polling, set later, if required */ |
| 234 | rh->usf = 7; /* will be set at scheduler */ |
| 235 | rh->pr = 0; /* FIXME: power reduction */ |
| 236 | rh->tfi = tbf->tfi; /* TFI */ |
| 237 | rh->fbi = 0; /* Final Block Indicator, set late, if true */ |
| 238 | rh->bsn = tbf->dir.dl.v_s; /* Block Sequence Number */ |
| 239 | rh->e = 0; /* Extension bit, maybe set later */ |
| 240 | e_pointer = data + 2; /* points to E of current chunk */ |
| 241 | data += 3; |
| 242 | delimiter = data; /* where next length header would be stored */ |
| 243 | space = block_data - 3; |
| 244 | while (1) { |
| 245 | chunk = tbf->llc_length - tbf->llc_index; |
| 246 | /* if chunk will exceed block limit */ |
| 247 | if (chunk > space) { |
| 248 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- Chunk with length %d " |
| 249 | "larger than space (%d) left in block: copy " |
| 250 | "only remaining space, and we are done\n", |
| 251 | chunk, space); |
| 252 | /* block is filled, so there is no extension */ |
| 253 | *e_pointer |= 0x01; |
| 254 | /* fill only space */ |
| 255 | memcpy(data, tbf->llc_frame + tbf->llc_index, space); |
| 256 | /* incement index */ |
| 257 | tbf->llc_index += space; |
| 258 | /* return data block as message */ |
| 259 | break; |
| 260 | } |
| 261 | /* if FINAL chunk would fit precisely in space left */ |
| 262 | if (chunk == space && llist_empty(&tbf->llc_queue)) { |
| 263 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- Chunk with length %d " |
| 264 | "would exactly fit into space (%d): because " |
| 265 | "this is a final block, we don't add length " |
| 266 | "header, and we are done\n", chunk, space); |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 267 | LOGP(DRLCMACDL, LOGL_INFO, "Complete DL frame for " |
| 268 | "TBF=%d that fits precisely in last block: " |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 269 | "len=%d\n", tbf->tfi, tbf->llc_length); |
Andreas Eversberg | 050ace2 | 2013-03-16 16:22:02 +0100 | [diff] [blame] | 270 | gprs_rlcmac_dl_bw(tbf, tbf->llc_length); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 271 | /* block is filled, so there is no extension */ |
| 272 | *e_pointer |= 0x01; |
| 273 | /* fill space */ |
| 274 | memcpy(data, tbf->llc_frame + tbf->llc_index, space); |
| 275 | /* reset LLC frame */ |
| 276 | tbf->llc_index = tbf->llc_length = 0; |
| 277 | /* final block */ |
| 278 | rh->fbi = 1; /* we indicate final block */ |
| 279 | tbf_new_state(tbf, GPRS_RLCMAC_FINISHED); |
| 280 | /* return data block as message */ |
| 281 | break; |
| 282 | } |
| 283 | /* if chunk would fit exactly in space left */ |
| 284 | if (chunk == space) { |
| 285 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- Chunk with length %d " |
| 286 | "would exactly fit into space (%d): add length " |
| 287 | "header with LI=0, to make frame extend to " |
| 288 | "next block, and we are done\n", chunk, space); |
| 289 | /* make space for delimiter */ |
| 290 | if (delimiter != data) |
| 291 | memcpy(delimiter + 1, delimiter, |
| 292 | data - delimiter); |
| 293 | data++; |
| 294 | space--; |
| 295 | /* add LI with 0 length */ |
| 296 | li = (struct rlc_li_field *)delimiter; |
| 297 | li->e = 1; /* not more extension */ |
| 298 | li->m = 0; /* shall be set to 0, in case of li = 0 */ |
| 299 | li->li = 0; /* chunk fills the complete space */ |
| 300 | // no need to set e_pointer nor increase delimiter |
| 301 | /* fill only space, which is 1 octet less than chunk */ |
| 302 | memcpy(data, tbf->llc_frame + tbf->llc_index, space); |
| 303 | /* incement index */ |
| 304 | tbf->llc_index += space; |
| 305 | /* return data block as message */ |
| 306 | break; |
| 307 | } |
| 308 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- Chunk with length %d is less " |
| 309 | "than remaining space (%d): add length header to " |
| 310 | "to delimit LLC frame\n", chunk, space); |
| 311 | /* the LLC frame chunk ends in this block */ |
| 312 | /* make space for delimiter */ |
| 313 | if (delimiter != data) |
| 314 | memcpy(delimiter + 1, delimiter, data - delimiter); |
| 315 | data++; |
| 316 | space--; |
| 317 | /* add LI to delimit frame */ |
| 318 | li = (struct rlc_li_field *)delimiter; |
| 319 | li->e = 0; /* Extension bit, maybe set later */ |
| 320 | li->m = 0; /* will be set later, if there is more LLC data */ |
| 321 | li->li = chunk; /* length of chunk */ |
| 322 | e_pointer = delimiter; /* points to E of current delimiter */ |
| 323 | delimiter++; |
| 324 | /* copy (rest of) LLC frame to space */ |
| 325 | memcpy(data, tbf->llc_frame + tbf->llc_index, chunk); |
| 326 | data += chunk; |
| 327 | space -= chunk; |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 328 | LOGP(DRLCMACDL, LOGL_INFO, "Complete DL frame for TBF=%d: " |
| 329 | "len=%d\n", tbf->tfi, tbf->llc_length); |
Andreas Eversberg | 050ace2 | 2013-03-16 16:22:02 +0100 | [diff] [blame] | 330 | gprs_rlcmac_dl_bw(tbf, tbf->llc_length); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 331 | /* reset LLC frame */ |
| 332 | tbf->llc_index = tbf->llc_length = 0; |
| 333 | /* dequeue next LLC frame, if any */ |
Holger Hans Peter Freyther | 1702f10 | 2013-10-20 08:44:02 +0200 | [diff] [blame] | 334 | msg = tbf->llc_dequeue(gprs_bssgp_pcu_current_bctx()); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 335 | if (msg) { |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 336 | LOGP(DRLCMACDL, LOGL_INFO, "- Dequeue next LLC for " |
| 337 | "TBF=%d (len=%d)\n", tbf->tfi, msg->len); |
Holger Hans Peter Freyther | 1702f10 | 2013-10-20 08:44:02 +0200 | [diff] [blame] | 338 | tbf->update_llc_frame(msg); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 339 | msgb_free(msg); |
| 340 | } |
| 341 | /* if we have more data and we have space left */ |
| 342 | if (space > 0 && tbf->llc_length) { |
| 343 | li->m = 1; /* we indicate more frames to follow */ |
| 344 | continue; |
| 345 | } |
| 346 | /* if we don't have more LLC frames */ |
| 347 | if (!tbf->llc_length) { |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 348 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- Final block, so we " |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 349 | "done.\n"); |
| 350 | li->e = 1; /* we cannot extend */ |
| 351 | rh->fbi = 1; /* we indicate final block */ |
Andreas Eversberg | 5f14bd9 | 2012-10-03 14:20:26 +0200 | [diff] [blame] | 352 | first_fin_ack = 1; |
Andreas Eversberg | f54a89e | 2012-07-16 11:56:11 +0200 | [diff] [blame] | 353 | /* + 1 indicates: first final ack */ |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 354 | tbf_new_state(tbf, GPRS_RLCMAC_FINISHED); |
| 355 | break; |
| 356 | } |
| 357 | /* we have no space left */ |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 358 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- No space left, so we are " |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 359 | "done.\n"); |
| 360 | li->e = 1; /* we cannot extend */ |
| 361 | break; |
| 362 | } |
| 363 | LOGP(DRLCMACDL, LOGL_DEBUG, "data block: %s\n", |
| 364 | osmo_hexdump(tbf->rlc_block[index], block_length)); |
| 365 | tbf->rlc_block_len[index] = block_length; |
| 366 | /* raise send state and set ack state array */ |
| 367 | tbf->dir.dl.v_b[index] = 'U'; /* unacked */ |
| 368 | tbf->dir.dl.v_s = (tbf->dir.dl.v_s + 1) & mod_sns; /* inc send state */ |
| 369 | |
| 370 | tx_block: |
| 371 | /* from this point on, new block is sent or old block is resent */ |
| 372 | |
| 373 | /* get data and header from current block */ |
| 374 | data = tbf->rlc_block[index]; |
| 375 | len = tbf->rlc_block_len[index]; |
| 376 | rh = (struct rlc_dl_header *)data; |
| 377 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 378 | /* Clear Polling, if still set in history buffer */ |
| 379 | rh->s_p = 0; |
| 380 | |
Andreas Eversberg | f54a89e | 2012-07-16 11:56:11 +0200 | [diff] [blame] | 381 | /* poll after POLL_ACK_AFTER_FRAMES frames, or when final block is tx. |
| 382 | */ |
Andreas Eversberg | 5f14bd9 | 2012-10-03 14:20:26 +0200 | [diff] [blame] | 383 | if (tbf->dir.dl.tx_counter >= POLL_ACK_AFTER_FRAMES || first_fin_ack) { |
| 384 | if (first_fin_ack) { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 385 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Scheduling Ack/Nack " |
Andreas Eversberg | 5f14bd9 | 2012-10-03 14:20:26 +0200 | [diff] [blame] | 386 | "polling, because first final block sent.\n"); |
Andreas Eversberg | 5e043da | 2012-07-15 06:51:30 +0200 | [diff] [blame] | 387 | } else { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 388 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Scheduling Ack/Nack " |
| 389 | "polling, because %d blocks sent.\n", |
Andreas Eversberg | f54a89e | 2012-07-16 11:56:11 +0200 | [diff] [blame] | 390 | POLL_ACK_AFTER_FRAMES); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 391 | } |
Andreas Eversberg | 5e043da | 2012-07-15 06:51:30 +0200 | [diff] [blame] | 392 | /* scheduling not possible, because: */ |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 393 | if (tbf->poll_state != GPRS_RLCMAC_POLL_NONE) |
Andreas Eversberg | 5e043da | 2012-07-15 06:51:30 +0200 | [diff] [blame] | 394 | LOGP(DRLCMAC, LOGL_DEBUG, "Polling is already " |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 395 | "sheduled for TBF=%d, so we must wait for " |
| 396 | "requesting downlink ack\n", tbf->tfi); |
Andreas Eversberg | 5e043da | 2012-07-15 06:51:30 +0200 | [diff] [blame] | 397 | else if (tbf->control_ts != ts) |
| 398 | LOGP(DRLCMAC, LOGL_DEBUG, "Polling cannot be " |
| 399 | "sheduled in this TS %d, waiting for " |
| 400 | "TS %d\n", ts, tbf->control_ts); |
Holger Hans Peter Freyther | b65e08a | 2013-10-20 17:10:25 +0200 | [diff] [blame] | 401 | else if (tbf->bts->sba()->find(tbf->trx_no, ts, (fn + 13) % 2715648)) |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 402 | LOGP(DRLCMAC, LOGL_DEBUG, "Polling cannot be " |
| 403 | "sheduled, because single block alllocation " |
| 404 | "already exists\n"); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 405 | else { |
Andreas Eversberg | ee31b78 | 2012-07-15 16:27:01 +0200 | [diff] [blame] | 406 | LOGP(DRLCMAC, LOGL_DEBUG, "Polling sheduled in this " |
| 407 | "TS %d\n", ts); |
Andreas Eversberg | 5f14bd9 | 2012-10-03 14:20:26 +0200 | [diff] [blame] | 408 | tbf->dir.dl.tx_counter = 0; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 409 | /* start timer whenever we send the final block */ |
| 410 | if (rh->fbi == 1) |
Andreas Eversberg | dfa563c | 2012-07-06 08:13:59 +0200 | [diff] [blame] | 411 | tbf_timer_start(tbf, 3191, bts->t3191, 0); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 412 | |
| 413 | /* schedule polling */ |
| 414 | tbf->poll_state = GPRS_RLCMAC_POLL_SCHED; |
| 415 | tbf->poll_fn = (fn + 13) % 2715648; |
| 416 | |
Andreas Eversberg | b83e2a7 | 2012-10-07 15:26:00 +0200 | [diff] [blame] | 417 | #ifdef DEBUG_DIAGRAM |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 418 | debug_diagram(bts->bts, tbf->diag, "poll DL-ACK"); |
Andreas Eversberg | b83e2a7 | 2012-10-07 15:26:00 +0200 | [diff] [blame] | 419 | if (first_fin_ack) |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 420 | debug_diagram(bts->bts, tbf->diag, "(is first FINAL)"); |
Andreas Eversberg | b83e2a7 | 2012-10-07 15:26:00 +0200 | [diff] [blame] | 421 | if (rh->fbi) |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 422 | debug_diagram(bts->bts, tbf->diag, "(FBI is set)"); |
Andreas Eversberg | b83e2a7 | 2012-10-07 15:26:00 +0200 | [diff] [blame] | 423 | #endif |
| 424 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 425 | /* set polling in header */ |
| 426 | rh->rrbp = 0; /* N+13 */ |
| 427 | rh->s_p = 1; /* Polling */ |
Andreas Eversberg | 5e043da | 2012-07-15 06:51:30 +0200 | [diff] [blame] | 428 | |
| 429 | /* Increment TX-counter */ |
| 430 | tbf->dir.dl.tx_counter++; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 431 | } |
Andreas Eversberg | 5e043da | 2012-07-15 06:51:30 +0200 | [diff] [blame] | 432 | } else { |
| 433 | /* Increment TX-counter */ |
| 434 | tbf->dir.dl.tx_counter++; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 435 | } |
| 436 | |
| 437 | /* return data block as message */ |
| 438 | dl_msg = msgb_alloc(len, "rlcmac_dl_data"); |
| 439 | if (!dl_msg) |
| 440 | return NULL; |
| 441 | memcpy(msgb_put(dl_msg, len), data, len); |
| 442 | |
| 443 | return dl_msg; |
| 444 | } |
| 445 | |
Holger Hans Peter Freyther | b65e08a | 2013-10-20 17:10:25 +0200 | [diff] [blame] | 446 | int gprs_rlcmac_downlink_ack( |
Holger Hans Peter Freyther | 344ff48 | 2013-10-17 12:01:04 +0200 | [diff] [blame] | 447 | struct gprs_rlcmac_tbf *tbf, uint8_t final, |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 448 | uint8_t ssn, uint8_t *rbb) |
| 449 | { |
| 450 | char show_rbb[65], show_v_b[RLC_MAX_SNS + 1]; |
| 451 | uint16_t mod_sns = tbf->sns - 1; |
| 452 | uint16_t mod_sns_half = (tbf->sns >> 1) - 1; |
| 453 | int i; /* must be signed */ |
| 454 | int16_t dist; /* must be signed */ |
| 455 | uint8_t bit; |
| 456 | uint16_t bsn; |
| 457 | struct msgb *msg; |
Andreas Eversberg | 050ace2 | 2013-03-16 16:22:02 +0100 | [diff] [blame] | 458 | uint16_t lost = 0, received = 0; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 459 | |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 460 | LOGP(DRLCMACDL, LOGL_DEBUG, "TBF=%d downlink acknowledge\n", |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 461 | tbf->tfi); |
| 462 | |
| 463 | if (!final) { |
| 464 | /* show received array in debug (bit 64..1) */ |
| 465 | for (i = 63; i >= 0; i--) { |
| 466 | bit = (rbb[i >> 3] >> (7 - (i&7))) & 1; |
| 467 | show_rbb[i] = (bit) ? '1' : 'o'; |
| 468 | } |
| 469 | show_rbb[64] = '\0'; |
| 470 | LOGP(DRLCMACDL, LOGL_DEBUG, "- ack: (BSN=%d)\"%s\"" |
Andreas Eversberg | 4b470ff | 2012-07-16 12:02:40 +0200 | [diff] [blame] | 471 | "(BSN=%d) 1=ACK o=NACK\n", (ssn - 64) & mod_sns, |
| 472 | show_rbb, (ssn - 1) & mod_sns); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 473 | |
| 474 | /* apply received array to receive state (SSN-64..SSN-1) */ |
| 475 | /* calculate distance of ssn from V(S) */ |
| 476 | dist = (tbf->dir.dl.v_s - ssn) & mod_sns; |
| 477 | /* check if distance is less than distance V(A)..V(S) */ |
Andreas Eversberg | 050ace2 | 2013-03-16 16:22:02 +0100 | [diff] [blame] | 478 | if (dist >= ((tbf->dir.dl.v_s - tbf->dir.dl.v_a) & mod_sns)) { |
Andreas Eversberg | 0f13c40 | 2012-07-16 11:59:23 +0200 | [diff] [blame] | 479 | /* this might happpen, if the downlink assignment |
| 480 | * was not received by ms and the ack refers |
| 481 | * to previous TBF |
| 482 | * FIXME: we should implement polling for |
| 483 | * control ack!*/ |
| 484 | LOGP(DRLCMACDL, LOGL_NOTICE, "- ack range is out of " |
| 485 | "V(A)..V(S) range (DL TBF=%d) Free TFB!\n", |
| 486 | tbf->tfi); |
| 487 | return 1; /* indicate to free TBF */ |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 488 | } |
Andreas Eversberg | 050ace2 | 2013-03-16 16:22:02 +0100 | [diff] [blame] | 489 | /* SSN - 1 is in range V(A)..V(S)-1 */ |
| 490 | for (i = 63, bsn = (ssn - 1) & mod_sns; |
| 491 | i >= 0 && bsn != ((tbf->dir.dl.v_a - 1) & mod_sns); |
| 492 | i--, bsn = (bsn - 1) & mod_sns) { |
| 493 | bit = (rbb[i >> 3] >> (7 - (i&7))) & 1; |
| 494 | if (bit) { |
| 495 | LOGP(DRLCMACDL, LOGL_DEBUG, "- got " |
| 496 | "ack for BSN=%d\n", bsn); |
| 497 | if (tbf->dir.dl.v_b[bsn & mod_sns_half] |
| 498 | != 'A') |
| 499 | received++; |
| 500 | tbf->dir.dl.v_b[bsn & mod_sns_half] = 'A'; |
| 501 | } else { |
| 502 | LOGP(DRLCMACDL, LOGL_DEBUG, "- got " |
| 503 | "NACK for BSN=%d\n", bsn); |
| 504 | tbf->dir.dl.v_b[bsn & mod_sns_half] = 'N'; |
| 505 | lost++; |
| 506 | } |
| 507 | } |
| 508 | /* report lost and received packets */ |
| 509 | gprs_rlcmac_received_lost(tbf, received, lost); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 510 | |
| 511 | /* raise V(A), if possible */ |
| 512 | for (i = 0, bsn = tbf->dir.dl.v_a; bsn != tbf->dir.dl.v_s; |
| 513 | i++, bsn = (bsn + 1) & mod_sns) { |
| 514 | if (tbf->dir.dl.v_b[bsn & mod_sns_half] == 'A') { |
| 515 | tbf->dir.dl.v_b[bsn & mod_sns_half] = 'I'; |
| 516 | /* mark invalid */ |
| 517 | tbf->dir.dl.v_a = (tbf->dir.dl.v_a + 1) |
| 518 | & mod_sns; |
| 519 | } else |
| 520 | break; |
| 521 | } |
| 522 | |
| 523 | /* show receive state array in debug (V(A)..V(S)-1) */ |
| 524 | for (i = 0, bsn = tbf->dir.dl.v_a; bsn != tbf->dir.dl.v_s; |
| 525 | i++, bsn = (bsn + 1) & mod_sns) { |
| 526 | show_v_b[i] = tbf->dir.dl.v_b[bsn & mod_sns_half]; |
| 527 | if (show_v_b[i] == 0) |
| 528 | show_v_b[i] = ' '; |
| 529 | } |
| 530 | show_v_b[i] = '\0'; |
| 531 | LOGP(DRLCMACDL, LOGL_DEBUG, "- V(B): (V(A)=%d)\"%s\"" |
| 532 | "(V(S)-1=%d) A=Acked N=Nacked U=Unacked " |
| 533 | "X=Resend-Unacked\n", tbf->dir.dl.v_a, show_v_b, |
| 534 | (tbf->dir.dl.v_s - 1) & mod_sns); |
| 535 | |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 536 | if (tbf->state_is(GPRS_RLCMAC_FINISHED) |
Andreas Eversberg | 6664a90 | 2012-07-15 06:52:19 +0200 | [diff] [blame] | 537 | && tbf->dir.dl.v_s == tbf->dir.dl.v_a) { |
Andreas Eversberg | 0c9b50c | 2012-10-07 15:50:51 +0200 | [diff] [blame] | 538 | LOGP(DRLCMACDL, LOGL_NOTICE, "Received acknowledge of " |
| 539 | "all blocks, but without final ack " |
| 540 | "inidcation (don't worry)\n"); |
| 541 | } |
| 542 | return 0; |
Andreas Eversberg | b83e2a7 | 2012-10-07 15:26:00 +0200 | [diff] [blame] | 543 | } |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 544 | |
Andreas Eversberg | 0c9b50c | 2012-10-07 15:50:51 +0200 | [diff] [blame] | 545 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Final ACK received.\n"); |
Holger Hans Peter Freyther | b65e08a | 2013-10-20 17:10:25 +0200 | [diff] [blame] | 546 | debug_diagram(tbf->bts, tbf->diag, "got Final ACK"); |
Andreas Eversberg | 050ace2 | 2013-03-16 16:22:02 +0100 | [diff] [blame] | 547 | /* range V(A)..V(S)-1 */ |
| 548 | for (bsn = tbf->dir.dl.v_a; bsn != tbf->dir.dl.v_s; |
| 549 | bsn = (bsn + 1) & mod_sns) { |
| 550 | if (tbf->dir.dl.v_b[bsn & mod_sns_half] != 'A') |
| 551 | received++; |
| 552 | } |
| 553 | |
| 554 | /* report all outstanding packets as received */ |
| 555 | gprs_rlcmac_received_lost(tbf, received, lost); |
Andreas Eversberg | 0c9b50c | 2012-10-07 15:50:51 +0200 | [diff] [blame] | 556 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 557 | /* check for LLC PDU in the LLC Queue */ |
Holger Hans Peter Freyther | 1702f10 | 2013-10-20 08:44:02 +0200 | [diff] [blame] | 558 | msg = tbf->llc_dequeue(gprs_bssgp_pcu_current_bctx()); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 559 | if (!msg) { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 560 | /* no message, start T3193, change state to RELEASE */ |
| 561 | LOGP(DRLCMACDL, LOGL_DEBUG, "- No new message, so we " |
| 562 | "release.\n"); |
Andreas Eversberg | b3c6f6c | 2012-07-06 07:40:08 +0200 | [diff] [blame] | 563 | /* start T3193 */ |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 564 | debug_diagram(bts->bts, tbf->diag, "start T3193"); |
Holger Hans Peter Freyther | b65e08a | 2013-10-20 17:10:25 +0200 | [diff] [blame] | 565 | tbf_timer_start(tbf, 3193, |
| 566 | tbf->bts->bts_data()->t3193_msec / 1000, |
| 567 | (tbf->bts->bts_data()->t3193_msec % 1000) * 1000); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 568 | tbf_new_state(tbf, GPRS_RLCMAC_WAIT_RELEASE); |
| 569 | |
| 570 | return 0; |
| 571 | } |
Holger Hans Peter Freyther | 1702f10 | 2013-10-20 08:44:02 +0200 | [diff] [blame] | 572 | #warning "Copy and paste on the sender path" |
| 573 | tbf->update_llc_frame(msg); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 574 | msgb_free(msg); |
| 575 | |
| 576 | /* we have a message, so we trigger downlink assignment, and there |
| 577 | * set the state to ASSIGN. also we set old_downlink, because we |
| 578 | * re-use this tbf. */ |
| 579 | LOGP(DRLCMAC, LOGL_DEBUG, "Trigger dowlink assignment on PACCH, " |
| 580 | "because another LLC PDU has arrived in between\n"); |
| 581 | memset(&tbf->dir.dl, 0, sizeof(tbf->dir.dl)); /* reset RLC states */ |
Andreas Eversberg | a9be154 | 2012-09-27 09:23:24 +0200 | [diff] [blame] | 582 | tbf->state_flags &= GPRS_RLCMAC_FLAG_TO_MASK; /* keep TO flags */ |
| 583 | tbf->state_flags &= ~(1 << GPRS_RLCMAC_FLAG_CCCH); |
Holger Hans Peter Freyther | aa9c326 | 2013-10-26 17:49:36 +0200 | [diff] [blame] | 584 | tbf->update(); |
Holger Hans Peter Freyther | 24c1a5b | 2013-10-26 20:27:44 +0200 | [diff] [blame] | 585 | tbf->bts->trigger_dl_ass(tbf, tbf, NULL); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 586 | return 0; |
| 587 | } |
| 588 | |
| 589 | |