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