Holger Hans Peter Freyther | 621dc2f | 2013-10-19 20:11:46 +0200 | [diff] [blame] | 1 | /* sba.cpp |
| 2 | * |
| 3 | * Copyright (C) 2012 Ivan Klyuchnikov |
| 4 | * Copyright (C) 2012 Andreas Eversberg <jolly@eversberg.eu> |
| 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 | cedf890 | 2013-10-19 20:47:12 +0200 | [diff] [blame] | 22 | #include <sba.h> |
Holger Hans Peter Freyther | 621dc2f | 2013-10-19 20:11:46 +0200 | [diff] [blame] | 23 | #include <gprs_rlcmac.h> |
| 24 | #include <gprs_debug.h> |
| 25 | #include <bts.h> |
| 26 | |
| 27 | extern "C" { |
| 28 | #include <osmocom/core/talloc.h> |
Max | 9bbe160 | 2016-07-18 12:50:18 +0200 | [diff] [blame] | 29 | #include <osmocom/gsm/protocol/gsm_04_08.h> |
Holger Hans Peter Freyther | 621dc2f | 2013-10-19 20:11:46 +0200 | [diff] [blame] | 30 | } |
| 31 | |
| 32 | #include <errno.h> |
| 33 | |
| 34 | extern void *tall_pcu_ctx; |
| 35 | |
| 36 | /* starting time for assigning single slot |
| 37 | * This offset must be a multiple of 13. */ |
| 38 | #define AGCH_START_OFFSET 52 |
| 39 | |
Holger Hans Peter Freyther | cedf890 | 2013-10-19 20:47:12 +0200 | [diff] [blame] | 40 | SBAController::SBAController(BTS &bts) |
| 41 | : m_bts(bts) |
| 42 | { |
| 43 | INIT_LLIST_HEAD(&m_sbas); |
| 44 | } |
Holger Hans Peter Freyther | 621dc2f | 2013-10-19 20:11:46 +0200 | [diff] [blame] | 45 | |
Holger Hans Peter Freyther | cedf890 | 2013-10-19 20:47:12 +0200 | [diff] [blame] | 46 | int SBAController::alloc( |
Holger Hans Peter Freyther | 621dc2f | 2013-10-19 20:11:46 +0200 | [diff] [blame] | 47 | uint8_t *_trx, uint8_t *_ts, uint32_t *_fn, uint8_t ta) |
| 48 | { |
| 49 | |
| 50 | struct gprs_rlcmac_pdch *pdch; |
| 51 | struct gprs_rlcmac_sba *sba; |
Jacob Erlbeck | 506f156 | 2015-07-02 13:19:49 +0200 | [diff] [blame] | 52 | int8_t trx, ts; |
Holger Hans Peter Freyther | 621dc2f | 2013-10-19 20:11:46 +0200 | [diff] [blame] | 53 | uint32_t fn; |
| 54 | |
| 55 | sba = talloc_zero(tall_pcu_ctx, struct gprs_rlcmac_sba); |
| 56 | if (!sba) |
| 57 | return -ENOMEM; |
| 58 | |
Max | 9bbe160 | 2016-07-18 12:50:18 +0200 | [diff] [blame] | 59 | if (!gsm48_ta_is_valid(ta)) |
| 60 | return -EINVAL; |
| 61 | |
Holger Hans Peter Freyther | 621dc2f | 2013-10-19 20:11:46 +0200 | [diff] [blame] | 62 | for (trx = 0; trx < 8; trx++) { |
Jacob Erlbeck | 506f156 | 2015-07-02 13:19:49 +0200 | [diff] [blame] | 63 | for (ts = 7; ts >= 0; ts--) { |
Holger Hans Peter Freyther | cedf890 | 2013-10-19 20:47:12 +0200 | [diff] [blame] | 64 | pdch = &m_bts.bts_data()->trx[trx].pdch[ts]; |
Holger Hans Peter Freyther | 621dc2f | 2013-10-19 20:11:46 +0200 | [diff] [blame] | 65 | if (!pdch->is_enabled()) |
| 66 | continue; |
| 67 | break; |
| 68 | } |
Jacob Erlbeck | 1139ec1 | 2015-07-15 14:17:19 +0200 | [diff] [blame] | 69 | if (ts >= 0) |
Holger Hans Peter Freyther | 621dc2f | 2013-10-19 20:11:46 +0200 | [diff] [blame] | 70 | break; |
| 71 | } |
| 72 | if (trx == 8) { |
| 73 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH available.\n"); |
| 74 | talloc_free(sba); |
| 75 | return -EINVAL; |
| 76 | } |
| 77 | |
| 78 | fn = (pdch->last_rts_fn + AGCH_START_OFFSET) % 2715648; |
| 79 | |
Holger Hans Peter Freyther | 09ef27a | 2013-10-20 16:37:05 +0200 | [diff] [blame] | 80 | sba->trx_no = trx; |
| 81 | sba->ts_no = ts; |
Holger Hans Peter Freyther | 621dc2f | 2013-10-19 20:11:46 +0200 | [diff] [blame] | 82 | sba->fn = fn; |
| 83 | sba->ta = ta; |
| 84 | |
Holger Hans Peter Freyther | cedf890 | 2013-10-19 20:47:12 +0200 | [diff] [blame] | 85 | llist_add(&sba->list, &m_sbas); |
Holger Hans Peter Freyther | 93e048f | 2013-10-27 10:00:47 +0100 | [diff] [blame] | 86 | m_bts.sba_allocated(); |
Holger Hans Peter Freyther | 621dc2f | 2013-10-19 20:11:46 +0200 | [diff] [blame] | 87 | |
| 88 | *_trx = trx; |
| 89 | *_ts = ts; |
| 90 | *_fn = fn; |
| 91 | return 0; |
| 92 | } |
| 93 | |
Holger Hans Peter Freyther | cedf890 | 2013-10-19 20:47:12 +0200 | [diff] [blame] | 94 | gprs_rlcmac_sba *SBAController::find(uint8_t trx, uint8_t ts, uint32_t fn) |
Holger Hans Peter Freyther | 621dc2f | 2013-10-19 20:11:46 +0200 | [diff] [blame] | 95 | { |
| 96 | struct gprs_rlcmac_sba *sba; |
| 97 | |
Holger Hans Peter Freyther | cedf890 | 2013-10-19 20:47:12 +0200 | [diff] [blame] | 98 | llist_for_each_entry(sba, &m_sbas, list) { |
Holger Hans Peter Freyther | 09ef27a | 2013-10-20 16:37:05 +0200 | [diff] [blame] | 99 | if (sba->trx_no == trx && sba->ts_no == ts && sba->fn == fn) |
Holger Hans Peter Freyther | 621dc2f | 2013-10-19 20:11:46 +0200 | [diff] [blame] | 100 | return sba; |
| 101 | } |
| 102 | |
| 103 | return NULL; |
| 104 | } |
| 105 | |
Holger Hans Peter Freyther | dea63b9 | 2013-10-26 18:56:43 +0200 | [diff] [blame] | 106 | gprs_rlcmac_sba *SBAController::find(const gprs_rlcmac_pdch *pdch, uint32_t fn) |
| 107 | { |
| 108 | return find(pdch->trx_no(), pdch->ts_no, fn); |
| 109 | } |
| 110 | |
Holger Hans Peter Freyther | cedf890 | 2013-10-19 20:47:12 +0200 | [diff] [blame] | 111 | uint32_t SBAController::sched(uint8_t trx, uint8_t ts, uint32_t fn, uint8_t block_nr) |
Holger Hans Peter Freyther | 621dc2f | 2013-10-19 20:11:46 +0200 | [diff] [blame] | 112 | { |
| 113 | uint32_t sba_fn; |
| 114 | struct gprs_rlcmac_sba *sba; |
| 115 | |
| 116 | /* check special TBF for events */ |
| 117 | sba_fn = fn + 4; |
| 118 | if ((block_nr % 3) == 2) |
| 119 | sba_fn ++; |
| 120 | sba_fn = sba_fn % 2715648; |
Holger Hans Peter Freyther | cedf890 | 2013-10-19 20:47:12 +0200 | [diff] [blame] | 121 | sba = find(trx, ts, sba_fn); |
Holger Hans Peter Freyther | 621dc2f | 2013-10-19 20:11:46 +0200 | [diff] [blame] | 122 | if (sba) |
| 123 | return sba_fn; |
| 124 | |
| 125 | return 0xffffffff; |
| 126 | } |
| 127 | |
Holger Hans Peter Freyther | cedf890 | 2013-10-19 20:47:12 +0200 | [diff] [blame] | 128 | int SBAController::timeout(struct gprs_rlcmac_sba *sba) |
Holger Hans Peter Freyther | 621dc2f | 2013-10-19 20:11:46 +0200 | [diff] [blame] | 129 | { |
| 130 | LOGP(DRLCMAC, LOGL_NOTICE, "Poll timeout for SBA\n"); |
Holger Hans Peter Freyther | 93e048f | 2013-10-27 10:00:47 +0100 | [diff] [blame] | 131 | m_bts.sba_timedout(); |
Holger Hans Peter Freyther | b98dd9e | 2013-10-27 10:20:37 +0100 | [diff] [blame] | 132 | free_sba(sba); |
Holger Hans Peter Freyther | 621dc2f | 2013-10-19 20:11:46 +0200 | [diff] [blame] | 133 | return 0; |
| 134 | } |
| 135 | |
Holger Hans Peter Freyther | b98dd9e | 2013-10-27 10:20:37 +0100 | [diff] [blame] | 136 | void SBAController::free_sba(gprs_rlcmac_sba *sba) |
| 137 | { |
| 138 | m_bts.sba_freed(); |
| 139 | llist_del(&sba->list); |
| 140 | talloc_free(sba); |
| 141 | } |
| 142 | |
Holger Hans Peter Freyther | 09ef27a | 2013-10-20 16:37:05 +0200 | [diff] [blame] | 143 | void SBAController::free_resources(struct gprs_rlcmac_pdch *pdch) |
Holger Hans Peter Freyther | cedf890 | 2013-10-19 20:47:12 +0200 | [diff] [blame] | 144 | { |
| 145 | struct gprs_rlcmac_sba *sba, *sba2; |
Holger Hans Peter Freyther | 09ef27a | 2013-10-20 16:37:05 +0200 | [diff] [blame] | 146 | const uint8_t trx_no = pdch->trx->trx_no; |
| 147 | const uint8_t ts_no = pdch->ts_no; |
Holger Hans Peter Freyther | cedf890 | 2013-10-19 20:47:12 +0200 | [diff] [blame] | 148 | |
| 149 | llist_for_each_entry_safe(sba, sba2, &m_sbas, list) { |
Holger Hans Peter Freyther | b98dd9e | 2013-10-27 10:20:37 +0100 | [diff] [blame] | 150 | if (sba->trx_no == trx_no && sba->ts_no == ts_no) |
| 151 | free_sba(sba); |
Holger Hans Peter Freyther | cedf890 | 2013-10-19 20:47:12 +0200 | [diff] [blame] | 152 | } |
| 153 | } |