Andreas Eversberg | 39621c4 | 2012-06-27 15:36:27 +0200 | [diff] [blame] | 1 | /* PDCH scheduler |
| 2 | * |
| 3 | * Copyright (C) 2012 Andreas Eversberg <jolly@eversberg.eu> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU General Public License |
| 7 | * as published by the Free Software Foundation; either version 2 |
| 8 | * of the License, or (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 18 | */ |
| 19 | |
| 20 | #include <gprs_bssgp_pcu.h> |
| 21 | #include <gprs_rlcmac.h> |
| 22 | #include <pcu_l1_if.h> |
Holger Hans Peter Freyther | 67ed34e | 2013-10-17 17:01:54 +0200 | [diff] [blame] | 23 | #include <bts.h> |
Holger Hans Peter Freyther | 099535a | 2013-10-16 17:42:31 +0200 | [diff] [blame] | 24 | #include <tbf.h> |
Andreas Eversberg | 39621c4 | 2012-06-27 15:36:27 +0200 | [diff] [blame] | 25 | |
Holger Hans Peter Freyther | 45396a9 | 2013-10-16 19:31:57 +0200 | [diff] [blame] | 26 | static uint32_t sched_poll(uint8_t trx, uint8_t ts, uint32_t fn, uint8_t block_nr, |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 27 | struct gprs_rlcmac_tbf **poll_tbf, |
Andreas Eversberg | ef42540 | 2012-07-25 15:47:03 +0200 | [diff] [blame] | 28 | struct gprs_rlcmac_tbf **ul_ass_tbf, |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 29 | struct gprs_rlcmac_tbf **dl_ass_tbf, |
Andreas Eversberg | ef42540 | 2012-07-25 15:47:03 +0200 | [diff] [blame] | 30 | struct gprs_rlcmac_tbf **ul_ack_tbf) |
Andreas Eversberg | 39621c4 | 2012-06-27 15:36:27 +0200 | [diff] [blame] | 31 | { |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 32 | struct gprs_rlcmac_tbf *tbf; |
Andreas Eversberg | 39621c4 | 2012-06-27 15:36:27 +0200 | [diff] [blame] | 33 | uint32_t poll_fn; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 34 | |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 35 | /* check special TBF for events */ |
Andreas Eversberg | 39621c4 | 2012-06-27 15:36:27 +0200 | [diff] [blame] | 36 | poll_fn = fn + 4; |
| 37 | if ((block_nr % 3) == 2) |
| 38 | poll_fn ++; |
| 39 | poll_fn = poll_fn % 2715648; |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 40 | llist_for_each_entry(tbf, &gprs_rlcmac_ul_tbfs, list) { |
| 41 | /* this trx, this ts */ |
Holger Hans Peter Freyther | 96efa70 | 2013-09-29 07:44:39 +0200 | [diff] [blame] | 42 | if (tbf->trx_no != trx || tbf->control_ts != ts) |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 43 | continue; |
| 44 | /* polling for next uplink block */ |
| 45 | if (tbf->poll_state == GPRS_RLCMAC_POLL_SCHED |
| 46 | && tbf->poll_fn == poll_fn) |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 47 | *poll_tbf = tbf; |
Andreas Eversberg | ee31b78 | 2012-07-15 16:27:01 +0200 | [diff] [blame] | 48 | if (tbf->ul_ack_state == GPRS_RLCMAC_UL_ACK_SEND_ACK) |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 49 | *ul_ack_tbf = tbf; |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 50 | if (tbf->dl_ass_state == GPRS_RLCMAC_DL_ASS_SEND_ASS) |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 51 | *dl_ass_tbf = tbf; |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 52 | if (tbf->ul_ass_state == GPRS_RLCMAC_UL_ASS_SEND_ASS) |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 53 | *ul_ass_tbf = tbf; |
Holger Hans Peter Freyther | 45396a9 | 2013-10-16 19:31:57 +0200 | [diff] [blame] | 54 | #warning "Is this supposed to be fair? The last TBF for each wins? Maybe use llist_add_tail and skip once we have all states?" |
Andreas Eversberg | 39621c4 | 2012-06-27 15:36:27 +0200 | [diff] [blame] | 55 | } |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 56 | llist_for_each_entry(tbf, &gprs_rlcmac_dl_tbfs, list) { |
| 57 | /* this trx, this ts */ |
Holger Hans Peter Freyther | 96efa70 | 2013-09-29 07:44:39 +0200 | [diff] [blame] | 58 | if (tbf->trx_no != trx || tbf->control_ts != ts) |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 59 | continue; |
| 60 | /* polling for next uplink block */ |
| 61 | if (tbf->poll_state == GPRS_RLCMAC_POLL_SCHED |
| 62 | && tbf->poll_fn == poll_fn) |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 63 | *poll_tbf = tbf; |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 64 | if (tbf->dl_ass_state == GPRS_RLCMAC_DL_ASS_SEND_ASS) |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 65 | *dl_ass_tbf = tbf; |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 66 | if (tbf->ul_ass_state == GPRS_RLCMAC_UL_ASS_SEND_ASS) |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 67 | *ul_ass_tbf = tbf; |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 68 | } |
| 69 | |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 70 | return poll_fn; |
| 71 | } |
| 72 | |
| 73 | uint8_t sched_select_uplink(uint8_t trx, uint8_t ts, uint32_t fn, |
| 74 | uint8_t block_nr, struct gprs_rlcmac_pdch *pdch) |
| 75 | { |
| 76 | struct gprs_rlcmac_tbf *tbf; |
| 77 | uint8_t usf = 0x07; |
| 78 | uint8_t i, tfi; |
| 79 | |
| 80 | /* select uplink ressource */ |
| 81 | for (i = 0, tfi = pdch->next_ul_tfi; i < 32; |
| 82 | i++, tfi = (tfi + 1) & 31) { |
| 83 | tbf = pdch->ul_tbf[tfi]; |
| 84 | /* no TBF for this tfi, go next */ |
| 85 | if (!tbf) |
| 86 | continue; |
Holger Hans Peter Freyther | 483f77a | 2013-10-16 16:33:00 +0200 | [diff] [blame] | 87 | /* no UL resources needed, go next */ |
| 88 | /* we don't need to give resources in FINISHED state, |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 89 | * because we have received all blocks and only poll |
| 90 | * for packet control ack. */ |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 91 | if (tbf->state_is_not(GPRS_RLCMAC_FLOW)) |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 92 | continue; |
| 93 | |
| 94 | /* use this USF */ |
| 95 | usf = tbf->dir.ul.usf[ts]; |
Andreas Eversberg | 39621c4 | 2012-06-27 15:36:27 +0200 | [diff] [blame] | 96 | LOGP(DRLCMACSCHED, LOGL_DEBUG, "Received RTS for PDCH: TRX=%d " |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 97 | "TS=%d FN=%d block_nr=%d scheduling USF=%d for " |
| 98 | "required uplink ressource of UL TBF=%d\n", trx, ts, fn, |
| 99 | block_nr, usf, tfi); |
| 100 | /* next TBF to handle ressource is the next one */ |
| 101 | pdch->next_ul_tfi = (tfi + 1) & 31; |
| 102 | break; |
Andreas Eversberg | 39621c4 | 2012-06-27 15:36:27 +0200 | [diff] [blame] | 103 | } |
| 104 | |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 105 | return usf; |
| 106 | } |
| 107 | |
Holger Hans Peter Freyther | ae947fc | 2013-10-17 13:29:03 +0200 | [diff] [blame] | 108 | static struct msgb *sched_select_ctrl_msg(struct gprs_rlcmac_bts *bts, |
| 109 | uint8_t trx, uint8_t ts, uint32_t fn, |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 110 | uint8_t block_nr, struct gprs_rlcmac_pdch *pdch, |
Andreas Eversberg | ef42540 | 2012-07-25 15:47:03 +0200 | [diff] [blame] | 111 | struct gprs_rlcmac_tbf *ul_ass_tbf, |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 112 | struct gprs_rlcmac_tbf *dl_ass_tbf, |
Andreas Eversberg | ef42540 | 2012-07-25 15:47:03 +0200 | [diff] [blame] | 113 | struct gprs_rlcmac_tbf *ul_ack_tbf) |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 114 | { |
| 115 | struct msgb *msg = NULL; |
| 116 | struct gprs_rlcmac_tbf *tbf = NULL; |
| 117 | |
Andreas Eversberg | 4b55962 | 2012-07-26 07:58:33 +0200 | [diff] [blame] | 118 | /* schedule PACKET UPLINK ASSIGNMENT (1st priority) */ |
Andreas Eversberg | ef42540 | 2012-07-25 15:47:03 +0200 | [diff] [blame] | 119 | if (ul_ass_tbf) { |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 120 | tbf = ul_ass_tbf; |
Holger Hans Peter Freyther | d507ce6 | 2013-10-17 15:32:37 +0200 | [diff] [blame] | 121 | msg = gprs_rlcmac_send_packet_uplink_assignment(bts, tbf, fn); |
Andreas Eversberg | ee31b78 | 2012-07-15 16:27:01 +0200 | [diff] [blame] | 122 | } |
Andreas Eversberg | 4b55962 | 2012-07-26 07:58:33 +0200 | [diff] [blame] | 123 | /* schedule PACKET DOWNLINK ASSIGNMENT (2nd priotiry) */ |
Andreas Eversberg | ef42540 | 2012-07-25 15:47:03 +0200 | [diff] [blame] | 124 | if (!msg && dl_ass_tbf) { |
| 125 | tbf = dl_ass_tbf; |
Holger Hans Peter Freyther | 9f521cd | 2013-10-17 13:48:11 +0200 | [diff] [blame] | 126 | msg = gprs_rlcmac_send_packet_downlink_assignment(bts, tbf, fn); |
Andreas Eversberg | ef42540 | 2012-07-25 15:47:03 +0200 | [diff] [blame] | 127 | } |
Andreas Eversberg | 4b55962 | 2012-07-26 07:58:33 +0200 | [diff] [blame] | 128 | /* schedule PACKET UPLINK ACK (3rd priority) */ |
Andreas Eversberg | ee31b78 | 2012-07-15 16:27:01 +0200 | [diff] [blame] | 129 | if (!msg && ul_ack_tbf) { |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 130 | tbf = ul_ack_tbf; |
Holger Hans Peter Freyther | ae947fc | 2013-10-17 13:29:03 +0200 | [diff] [blame] | 131 | msg = gprs_rlcmac_send_uplink_ack(bts, tbf, fn); |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 132 | } |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 133 | /* any message */ |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 134 | if (msg) { |
| 135 | LOGP(DRLCMACSCHED, LOGL_DEBUG, "Scheduling control " |
| 136 | "message at RTS for %s TBF=%d (TRX=%d, TS=%d)\n", |
| 137 | (tbf->direction == GPRS_RLCMAC_UL_TBF) |
| 138 | ? "UL" : "DL", tbf->tfi, trx, ts); |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 139 | return msg; |
Andreas Eversberg | 39621c4 | 2012-06-27 15:36:27 +0200 | [diff] [blame] | 140 | } |
Andreas Eversberg | 3b7461c | 2012-07-20 11:19:59 +0200 | [diff] [blame] | 141 | /* schedule PACKET PAGING REQUEST */ |
Holger Hans Peter Freyther | 24e98d0 | 2013-10-19 18:15:44 +0200 | [diff] [blame] | 142 | msg = pdch->packet_paging_request(); |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 143 | if (msg) { |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 144 | LOGP(DRLCMACSCHED, LOGL_DEBUG, "Scheduling paging request " |
| 145 | "message at RTS for (TRX=%d, TS=%d)\n", trx, ts); |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 146 | return msg; |
| 147 | } |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 148 | |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 149 | return NULL; |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 150 | } |
| 151 | |
Holger Hans Peter Freyther | 4ffc260 | 2013-10-17 15:21:10 +0200 | [diff] [blame] | 152 | static struct msgb *sched_select_downlink(struct gprs_rlcmac_bts *bts, |
| 153 | uint8_t trx, uint8_t ts, uint32_t fn, |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 154 | uint8_t block_nr, struct gprs_rlcmac_pdch *pdch) |
| 155 | { |
| 156 | struct msgb *msg = NULL; |
| 157 | struct gprs_rlcmac_tbf *tbf = NULL; |
| 158 | uint8_t i, tfi; |
| 159 | |
| 160 | /* select downlink ressource */ |
| 161 | for (i = 0, tfi = pdch->next_dl_tfi; i < 32; |
| 162 | i++, tfi = (tfi + 1) & 31) { |
| 163 | tbf = pdch->dl_tbf[tfi]; |
| 164 | /* no TBF for this tfi, go next */ |
| 165 | if (!tbf) |
| 166 | continue; |
| 167 | /* no DL TBF, go next */ |
| 168 | if (tbf->direction != GPRS_RLCMAC_DL_TBF) |
| 169 | continue; |
Holger Hans Peter Freyther | 483f77a | 2013-10-16 16:33:00 +0200 | [diff] [blame] | 170 | /* no DL resources needed, go next */ |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 171 | if (tbf->state_is_not(GPRS_RLCMAC_FLOW) |
| 172 | && tbf->state_is_not(GPRS_RLCMAC_FINISHED)) |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 173 | continue; |
| 174 | |
Andreas Eversberg | a9be154 | 2012-09-27 09:23:24 +0200 | [diff] [blame] | 175 | /* waiting for CCCH IMM.ASS confirm */ |
| 176 | if (tbf->dir.dl.wait_confirm) |
| 177 | continue; |
| 178 | |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 179 | LOGP(DRLCMACSCHED, LOGL_DEBUG, "Scheduling data message at " |
| 180 | "RTS for DL TBF=%d (TRX=%d, TS=%d)\n", tfi, trx, ts); |
| 181 | /* next TBF to handle ressource is the next one */ |
| 182 | pdch->next_dl_tfi = (tfi + 1) & 31; |
| 183 | /* generate DL data block */ |
Holger Hans Peter Freyther | 4ffc260 | 2013-10-17 15:21:10 +0200 | [diff] [blame] | 184 | msg = gprs_rlcmac_send_data_block_acknowledged(bts, tbf, fn, |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 185 | ts); |
| 186 | break; |
Andreas Eversberg | 3b7461c | 2012-07-20 11:19:59 +0200 | [diff] [blame] | 187 | } |
Andreas Eversberg | 39621c4 | 2012-06-27 15:36:27 +0200 | [diff] [blame] | 188 | |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 189 | return msg; |
| 190 | } |
| 191 | static uint8_t rlcmac_dl_idle[23] = { |
| 192 | 0x47, /* control without optional header octets, no polling, USF=111 */ |
| 193 | 0x94, /* dummy downlink control message, paging mode 00 */ |
| 194 | 0x2b, /* no persistance level, 7 bits spare pattern */ |
| 195 | 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, |
| 196 | 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b |
| 197 | }; |
| 198 | |
| 199 | struct msgb *sched_dummy(void) |
| 200 | { |
| 201 | struct msgb *msg; |
| 202 | |
| 203 | msg = msgb_alloc(23, "rlcmac_dl_idle"); |
| 204 | if (!msg) |
| 205 | return NULL; |
| 206 | memcpy(msgb_put(msg, 23), rlcmac_dl_idle, 23); |
| 207 | |
| 208 | return msg; |
| 209 | } |
| 210 | |
Holger Hans Peter Freyther | b19d726 | 2013-10-17 18:12:18 +0200 | [diff] [blame] | 211 | int gprs_rlcmac_rcv_rts_block(struct gprs_rlcmac_bts *bts, |
| 212 | uint8_t trx, uint8_t ts, uint16_t arfcn, |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 213 | uint32_t fn, uint8_t block_nr) |
| 214 | { |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 215 | struct gprs_rlcmac_pdch *pdch; |
| 216 | struct gprs_rlcmac_tbf *poll_tbf = NULL, *dl_ass_tbf = NULL, |
| 217 | *ul_ass_tbf = NULL, *ul_ack_tbf = NULL; |
| 218 | uint8_t usf = 0x7; |
| 219 | struct msgb *msg = NULL; |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 220 | uint32_t poll_fn, sba_fn; |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 221 | |
| 222 | if (trx >= 8 || ts >= 8) |
| 223 | return -EINVAL; |
| 224 | pdch = &bts->trx[trx].pdch[ts]; |
| 225 | |
Holger Hans Peter Freyther | 17b0d83 | 2013-10-19 17:37:48 +0200 | [diff] [blame] | 226 | if (!pdch->is_enabled()) { |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 227 | LOGP(DRLCMACSCHED, LOGL_ERROR, "Received RTS on disabled PDCH: " |
| 228 | "TRX=%d TS=%d\n", trx, ts); |
| 229 | return -EIO; |
| 230 | } |
| 231 | |
| 232 | /* store last frame number of RTS */ |
| 233 | pdch->last_rts_fn = fn; |
| 234 | |
Andreas Eversberg | ef42540 | 2012-07-25 15:47:03 +0200 | [diff] [blame] | 235 | poll_fn = sched_poll(trx, ts, fn, block_nr, &poll_tbf, &ul_ass_tbf, |
| 236 | &dl_ass_tbf, &ul_ack_tbf); |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 237 | /* check uplink ressource for polling */ |
| 238 | if (poll_tbf) |
| 239 | LOGP(DRLCMACSCHED, LOGL_DEBUG, "Received RTS for PDCH: TRX=%d " |
| 240 | "TS=%d FN=%d block_nr=%d scheduling free USF for " |
| 241 | "polling at FN=%d of %s TFI=%d\n", trx, ts, fn, |
| 242 | block_nr, poll_fn, |
| 243 | (poll_tbf->direction == GPRS_RLCMAC_UL_TBF) |
| 244 | ? "UL" : "DL", poll_tbf->tfi); |
| 245 | /* use free USF */ |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 246 | /* else. check for sba */ |
Holger Hans Peter Freyther | cedf890 | 2013-10-19 20:47:12 +0200 | [diff] [blame] | 247 | else if ((sba_fn = bts->bts->sba()->sched(trx, ts, fn, block_nr) != 0xffffffff)) |
Andreas Eversberg | 07e97cf | 2012-08-07 16:00:56 +0200 | [diff] [blame] | 248 | LOGP(DRLCMACSCHED, LOGL_DEBUG, "Received RTS for PDCH: TRX=%d " |
| 249 | "TS=%d FN=%d block_nr=%d scheduling free USF for " |
| 250 | "single block allocation at FN=%d\n", trx, ts, fn, |
| 251 | block_nr, sba_fn); |
| 252 | /* use free USF */ |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 253 | /* else, we search for uplink ressource */ |
| 254 | else |
| 255 | usf = sched_select_uplink(trx, ts, fn, block_nr, pdch); |
| 256 | |
| 257 | /* Prio 1: select control message */ |
Holger Hans Peter Freyther | ae947fc | 2013-10-17 13:29:03 +0200 | [diff] [blame] | 258 | msg = sched_select_ctrl_msg(bts, trx, ts, fn, block_nr, pdch, ul_ass_tbf, |
Andreas Eversberg | ef42540 | 2012-07-25 15:47:03 +0200 | [diff] [blame] | 259 | dl_ass_tbf, ul_ack_tbf); |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 260 | |
Andreas Eversberg | 39621c4 | 2012-06-27 15:36:27 +0200 | [diff] [blame] | 261 | /* Prio 2: select data message for downlink */ |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 262 | if (!msg) |
Holger Hans Peter Freyther | 4ffc260 | 2013-10-17 15:21:10 +0200 | [diff] [blame] | 263 | msg = sched_select_downlink(bts, trx, ts, fn, block_nr, pdch); |
Andreas Eversberg | 39621c4 | 2012-06-27 15:36:27 +0200 | [diff] [blame] | 264 | |
| 265 | /* Prio 3: send dummy contol message */ |
Andreas Eversberg | d6a8db6 | 2012-07-25 08:38:21 +0200 | [diff] [blame] | 266 | if (!msg) |
| 267 | msg = sched_dummy(); |
| 268 | |
| 269 | if (!msg) |
| 270 | return -ENOMEM; |
Andreas Eversberg | 39621c4 | 2012-06-27 15:36:27 +0200 | [diff] [blame] | 271 | /* msg is now available */ |
| 272 | |
| 273 | /* set USF */ |
| 274 | msg->data[0] = (msg->data[0] & 0xf8) | usf; |
| 275 | |
Andreas Eversberg | 39621c4 | 2012-06-27 15:36:27 +0200 | [diff] [blame] | 276 | /* send PDTCH/PACCH to L1 */ |
| 277 | pcu_l1if_tx_pdtch(msg, trx, ts, arfcn, fn, block_nr); |
| 278 | |
| 279 | return 0; |
| 280 | } |