Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 1 | /* gprs_rlcmac.cpp |
| 2 | * |
| 3 | * Copyright (C) 2012 Ivan Klyuchnikov |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 4 | * Copyright (C) 2012 Andreas Eversberg <jolly@eversberg.eu> |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 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 <pcu_l1_if.h> |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 23 | #include <gprs_rlcmac.h> |
| 24 | |
Andreas Eversberg | 53f4725 | 2012-07-15 07:10:10 +0200 | [diff] [blame] | 25 | /* 3GPP TS 05.02 Annex B.1 */ |
| 26 | |
| 27 | #define MS_NA 255 /* N/A */ |
| 28 | #define MS_A 254 /* 1 with hopping, 0 without */ |
| 29 | #define MS_B 253 /* 1 with hopping, 0 without (change Rx to Tx)*/ |
| 30 | #define MS_C 252 /* 1 with hopping, 0 without (change Tx to Rx)*/ |
| 31 | |
| 32 | struct gprs_ms_multislot_class { |
| 33 | uint8_t rx, tx, sum; /* Maximum Number of Slots: RX, Tx, Sum Rx+Tx */ |
| 34 | uint8_t ta, tb, ra, rb; /* Minimum Number of Slots */ |
| 35 | uint8_t type; /* Type of Mobile */ |
| 36 | }; |
| 37 | |
| 38 | struct gprs_ms_multislot_class gprs_ms_multislot_class[32] = { |
| 39 | /* M-S Class Rx Tx Sum Tta Ttb Tra Trb Type */ |
| 40 | /* N/A */ { MS_NA,MS_NA, MS_NA, MS_NA, MS_NA, MS_NA, MS_NA, MS_NA }, |
| 41 | /* 1 */ { 1, 1, 2, 3, 2, 4, 2, 1 }, |
| 42 | /* 2 */ { 2, 1, 3, 3, 2, 3, 1, 1 }, |
| 43 | /* 3 */ { 2, 2, 3, 3, 2, 3, 1, 1 }, |
| 44 | /* 4 */ { 3, 1, 4, 3, 1, 3, 1, 1 }, |
| 45 | /* 5 */ { 2, 2, 4, 3, 1, 3, 1, 1 }, |
| 46 | /* 6 */ { 3, 2, 4, 3, 1, 3, 1, 1 }, |
| 47 | /* 7 */ { 3, 3, 4, 3, 1, 3, 1, 1 }, |
| 48 | /* 8 */ { 4, 1, 5, 3, 1, 2, 1, 1 }, |
| 49 | /* 9 */ { 3, 2, 5, 3, 1, 2, 1, 1 }, |
| 50 | /* 10 */ { 4, 2, 5, 3, 1, 2, 1, 1 }, |
| 51 | /* 11 */ { 4, 3, 5, 3, 1, 2, 1, 1 }, |
| 52 | /* 12 */ { 4, 4, 5, 2, 1, 2, 1, 1 }, |
| 53 | /* 13 */ { 3, 3, MS_NA, MS_NA, MS_A, 3, MS_A, 2 }, |
| 54 | /* 14 */ { 4, 4, MS_NA, MS_NA, MS_A, 3, MS_A, 2 }, |
| 55 | /* 15 */ { 5, 5, MS_NA, MS_NA, MS_A, 3, MS_A, 2 }, |
| 56 | /* 16 */ { 6, 6, MS_NA, MS_NA, MS_A, 2, MS_A, 2 }, |
| 57 | /* 17 */ { 7, 7, MS_NA, MS_NA, MS_A, 1, 0, 2 }, |
| 58 | /* 18 */ { 8, 8, MS_NA, MS_NA, 0, 0, 0, 2 }, |
| 59 | /* 19 */ { 6, 2, MS_NA, 3, MS_B, 2, MS_C, 1 }, |
| 60 | /* 20 */ { 6, 3, MS_NA, 3, MS_B, 2, MS_C, 1 }, |
| 61 | /* 21 */ { 6, 4, MS_NA, 3, MS_B, 2, MS_C, 1 }, |
| 62 | /* 22 */ { 6, 4, MS_NA, 2, MS_B, 2, MS_C, 1 }, |
| 63 | /* 23 */ { 6, 6, MS_NA, 2, MS_B, 2, MS_C, 1 }, |
| 64 | /* 24 */ { 8, 2, MS_NA, 3, MS_B, 2, MS_C, 1 }, |
| 65 | /* 25 */ { 8, 3, MS_NA, 3, MS_B, 2, MS_C, 1 }, |
| 66 | /* 26 */ { 8, 4, MS_NA, 3, MS_B, 2, MS_C, 1 }, |
| 67 | /* 27 */ { 8, 4, MS_NA, 2, MS_B, 2, MS_C, 1 }, |
| 68 | /* 28 */ { 8, 6, MS_NA, 2, MS_B, 2, MS_C, 1 }, |
| 69 | /* 29 */ { 8, 8, MS_NA, 2, MS_B, 2, MS_C, 1 }, |
| 70 | /* N/A */ { MS_NA,MS_NA, MS_NA, MS_NA, MS_NA, MS_NA, MS_NA, MS_NA }, |
| 71 | /* N/A */ { MS_NA,MS_NA, MS_NA, MS_NA, MS_NA, MS_NA, MS_NA, MS_NA }, |
| 72 | }; |
| 73 | |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 74 | LLIST_HEAD(gprs_rlcmac_ul_tbfs); |
| 75 | LLIST_HEAD(gprs_rlcmac_dl_tbfs); |
Andreas Eversberg | 2b91464 | 2012-07-19 13:06:26 +0200 | [diff] [blame] | 76 | llist_head *gprs_rlcmac_tbfs_lists[] = { |
| 77 | &gprs_rlcmac_ul_tbfs, |
| 78 | &gprs_rlcmac_dl_tbfs, |
| 79 | NULL |
| 80 | }; |
Andreas Eversberg | 6681bb8 | 2012-07-25 08:48:44 +0200 | [diff] [blame] | 81 | extern void *tall_pcu_ctx; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 82 | |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 83 | /* FIXME: spread ressources over multiple TRX. Also add option to use same |
| 84 | * TRX in case of existing TBF for TLLI in the other direction. */ |
| 85 | /* search for free TFI and return TFI, TRX and first TS */ |
| 86 | int tfi_alloc(enum gprs_rlcmac_tbf_direction dir, uint8_t *_trx, uint8_t *_ts, |
| 87 | uint8_t use_trx, uint8_t first_ts) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 88 | { |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 89 | struct gprs_rlcmac_bts *bts = gprs_rlcmac_bts; |
| 90 | struct gprs_rlcmac_pdch *pdch; |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 91 | struct gprs_rlcmac_tbf **tbfp; |
| 92 | uint8_t trx_from, trx_to, trx, ts, tfi; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 93 | |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 94 | if (use_trx >= 0 && use_trx < 8) |
| 95 | trx_from = trx_to = use_trx; |
| 96 | else { |
| 97 | trx_from = 0; |
| 98 | trx_to = 7; |
| 99 | } |
| 100 | if (first_ts < 0 || first_ts >= 8) |
| 101 | first_ts = 0; |
| 102 | |
| 103 | /* on TRX find first enabled TS */ |
| 104 | for (trx = trx_from; trx <= trx_to; trx++) { |
| 105 | for (ts = first_ts; ts < 8; ts++) { |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 106 | pdch = &bts->trx[trx].pdch[ts]; |
| 107 | if (!pdch->enable) |
| 108 | continue; |
| 109 | break; |
| 110 | } |
| 111 | if (ts < 8) |
| 112 | break; |
| 113 | } |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 114 | if (trx > trx_to) { |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 115 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH available.\n"); |
| 116 | return -EINVAL; |
| 117 | } |
| 118 | |
| 119 | |
| 120 | LOGP(DRLCMAC, LOGL_DEBUG, "Searching for first unallocated TFI: " |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 121 | "TRX=%d first TS=%d\n", trx, ts); |
| 122 | if (dir == GPRS_RLCMAC_UL_TBF) |
| 123 | tbfp = pdch->ul_tbf; |
| 124 | else |
| 125 | tbfp = pdch->dl_tbf; |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 126 | for (tfi = 0; tfi < 32; tfi++) { |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 127 | if (!tbfp[tfi]) |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 128 | break; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 129 | } |
| 130 | |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 131 | if (tfi < 32) { |
| 132 | LOGP(DRLCMAC, LOGL_DEBUG, " Found TFI=%d.\n", tfi); |
| 133 | *_trx = trx; |
| 134 | *_ts = ts; |
| 135 | return tfi; |
| 136 | } |
| 137 | LOGP(DRLCMAC, LOGL_NOTICE, "No TFI available.\n"); |
| 138 | |
| 139 | return -1; |
| 140 | } |
| 141 | |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 142 | static inline int8_t find_free_usf(struct gprs_rlcmac_pdch *pdch, uint8_t ts) |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 143 | { |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 144 | struct gprs_rlcmac_tbf *tbf; |
| 145 | uint8_t usf_map = 0; |
| 146 | uint8_t tfi, usf; |
| 147 | |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 148 | /* make map of used USF */ |
| 149 | for (tfi = 0; tfi < 32; tfi++) { |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 150 | tbf = pdch->ul_tbf[tfi]; |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 151 | if (!tbf) |
| 152 | continue; |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 153 | usf_map |= (1 << tbf->dir.ul.usf[ts]); |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 154 | } |
| 155 | |
| 156 | /* look for USF, don't use USF=7 */ |
| 157 | for (usf = 0; usf < 7; usf++) { |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 158 | if (!(usf_map & (1 << usf))) |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 159 | return usf; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 160 | } |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 161 | |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 162 | return -1; |
| 163 | } |
| 164 | |
| 165 | /* lookup TBF Entity (by TFI) */ |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 166 | struct gprs_rlcmac_tbf *tbf_by_tfi(uint8_t tfi, uint8_t trx, uint8_t ts, |
| 167 | enum gprs_rlcmac_tbf_direction dir) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 168 | { |
| 169 | struct gprs_rlcmac_tbf *tbf; |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 170 | struct gprs_rlcmac_bts *bts = gprs_rlcmac_bts; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 171 | |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 172 | if (tfi >= 32 || trx >= 8 || ts >= 8) |
| 173 | return NULL; |
| 174 | |
| 175 | if (dir == GPRS_RLCMAC_UL_TBF) |
| 176 | tbf = bts->trx[trx].pdch[ts].ul_tbf[tfi]; |
| 177 | else |
| 178 | tbf = bts->trx[trx].pdch[ts].dl_tbf[tfi]; |
| 179 | if (!tbf) |
| 180 | return NULL; |
| 181 | |
| 182 | if (tbf->state != GPRS_RLCMAC_RELEASING) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 183 | return tbf; |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 184 | |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 185 | return NULL; |
| 186 | } |
| 187 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 188 | /* search for active downlink or uplink tbf */ |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 189 | struct gprs_rlcmac_tbf *tbf_by_tlli(uint32_t tlli, |
| 190 | enum gprs_rlcmac_tbf_direction dir) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 191 | { |
| 192 | struct gprs_rlcmac_tbf *tbf; |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 193 | if (dir == GPRS_RLCMAC_UL_TBF) { |
| 194 | llist_for_each_entry(tbf, &gprs_rlcmac_ul_tbfs, list) { |
| 195 | if (tbf->state != GPRS_RLCMAC_RELEASING |
Andreas Eversberg | a9b9407 | 2012-07-15 19:30:41 +0200 | [diff] [blame] | 196 | && tbf->tlli == tlli && tbf->tlli_valid) |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 197 | return tbf; |
| 198 | } |
| 199 | } else { |
| 200 | llist_for_each_entry(tbf, &gprs_rlcmac_dl_tbfs, list) { |
| 201 | if (tbf->state != GPRS_RLCMAC_RELEASING |
| 202 | && tbf->tlli == tlli) |
| 203 | return tbf; |
| 204 | } |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 205 | } |
| 206 | return NULL; |
| 207 | } |
| 208 | |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 209 | struct gprs_rlcmac_tbf *tbf_by_poll_fn(uint32_t fn, uint8_t trx, uint8_t ts) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 210 | { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 211 | struct gprs_rlcmac_tbf *tbf; |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 212 | |
| 213 | /* only one TBF can poll on specific TS/FN, because scheduler can only |
| 214 | * schedule one downlink control block (with polling) at a FN per TS */ |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 215 | llist_for_each_entry(tbf, &gprs_rlcmac_ul_tbfs, list) { |
| 216 | if (tbf->state != GPRS_RLCMAC_RELEASING |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 217 | && tbf->poll_state == GPRS_RLCMAC_POLL_SCHED |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 218 | && tbf->poll_fn == fn && tbf->trx == trx |
| 219 | && tbf->control_ts == ts) |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 220 | return tbf; |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 221 | } |
| 222 | llist_for_each_entry(tbf, &gprs_rlcmac_dl_tbfs, list) { |
| 223 | if (tbf->state != GPRS_RLCMAC_RELEASING |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 224 | && tbf->poll_state == GPRS_RLCMAC_POLL_SCHED |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 225 | && tbf->poll_fn == fn && tbf->trx == trx |
| 226 | && tbf->control_ts == ts) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 227 | return tbf; |
| 228 | } |
| 229 | return NULL; |
| 230 | } |
| 231 | |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 232 | struct gprs_rlcmac_tbf *tbf_alloc(struct gprs_rlcmac_tbf *old_tbf, |
| 233 | enum gprs_rlcmac_tbf_direction dir, uint8_t tfi, uint8_t trx, |
| 234 | uint8_t first_ts, uint8_t ms_class, uint8_t single_slot) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 235 | { |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 236 | struct gprs_rlcmac_bts *bts = gprs_rlcmac_bts; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 237 | struct gprs_rlcmac_tbf *tbf; |
Andreas Eversberg | f298fa8 | 2012-07-13 14:50:57 +0200 | [diff] [blame] | 238 | int rc; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 239 | |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 240 | LOGP(DRLCMAC, LOGL_DEBUG, "********** TBF starts here **********\n"); |
Andreas Eversberg | f298fa8 | 2012-07-13 14:50:57 +0200 | [diff] [blame] | 241 | LOGP(DRLCMAC, LOGL_INFO, "Allocating %s TBF: TFI=%d TRX=%d " |
| 242 | "MS_CLASS=%d\n", (dir == GPRS_RLCMAC_UL_TBF) ? "UL" : "DL", |
| 243 | tfi, trx, ms_class); |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 244 | |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 245 | if (trx >= 8 || first_ts >= 8 || tfi >= 32) |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 246 | return NULL; |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 247 | |
Andreas Eversberg | 6681bb8 | 2012-07-25 08:48:44 +0200 | [diff] [blame] | 248 | tbf = talloc_zero(tall_pcu_ctx, struct gprs_rlcmac_tbf); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 249 | if (!tbf) |
| 250 | return NULL; |
| 251 | |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 252 | tbf->direction = dir; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 253 | tbf->tfi = tfi; |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame] | 254 | tbf->trx = trx; |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 255 | tbf->arfcn = bts->trx[trx].arfcn; |
Andreas Eversberg | f298fa8 | 2012-07-13 14:50:57 +0200 | [diff] [blame] | 256 | tbf->first_ts = first_ts; |
| 257 | tbf->ms_class = ms_class; |
| 258 | tbf->ws = 64; |
| 259 | tbf->sns = 128; |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 260 | /* select algorithm A in case we don't have multislot class info */ |
| 261 | if (single_slot || ms_class == 0) |
| 262 | rc = alloc_algorithm_a(old_tbf, tbf, |
| 263 | bts->alloc_algorithm_curst); |
Andreas Eversberg | f298fa8 | 2012-07-13 14:50:57 +0200 | [diff] [blame] | 264 | else |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 265 | rc = bts->alloc_algorithm(old_tbf, tbf, |
| 266 | bts->alloc_algorithm_curst); |
| 267 | /* if no ressource */ |
| 268 | if (rc < 0) { |
| 269 | talloc_free(tbf); |
| 270 | return NULL; |
| 271 | } |
| 272 | /* assign control ts */ |
| 273 | tbf->control_ts = 0xff; |
| 274 | rc = tbf_assign_control_ts(tbf); |
Andreas Eversberg | f298fa8 | 2012-07-13 14:50:57 +0200 | [diff] [blame] | 275 | /* if no ressource */ |
| 276 | if (rc < 0) { |
| 277 | talloc_free(tbf); |
| 278 | return NULL; |
| 279 | } |
| 280 | |
Andreas Eversberg | b3ded4c | 2012-07-24 10:47:24 +0200 | [diff] [blame] | 281 | /* set timestamp */ |
| 282 | gettimeofday(&tbf->bw_tv, NULL); |
| 283 | |
Andreas Eversberg | f298fa8 | 2012-07-13 14:50:57 +0200 | [diff] [blame] | 284 | INIT_LLIST_HEAD(&tbf->llc_queue); |
| 285 | if (dir == GPRS_RLCMAC_UL_TBF) |
| 286 | llist_add(&tbf->list, &gprs_rlcmac_ul_tbfs); |
| 287 | else |
| 288 | llist_add(&tbf->list, &gprs_rlcmac_dl_tbfs); |
| 289 | |
| 290 | return tbf; |
| 291 | } |
| 292 | |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 293 | /* Slot Allocation: Algorithm A |
| 294 | * |
| 295 | * Assign single slot for uplink and downlink |
| 296 | */ |
| 297 | int alloc_algorithm_a(struct gprs_rlcmac_tbf *old_tbf, |
| 298 | struct gprs_rlcmac_tbf *tbf, uint32_t cust) |
Andreas Eversberg | f298fa8 | 2012-07-13 14:50:57 +0200 | [diff] [blame] | 299 | { |
| 300 | struct gprs_rlcmac_bts *bts = gprs_rlcmac_bts; |
| 301 | struct gprs_rlcmac_pdch *pdch; |
| 302 | uint8_t ts = tbf->first_ts; |
| 303 | int8_t usf; /* must be signed */ |
| 304 | |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 305 | LOGP(DRLCMAC, LOGL_DEBUG, "Slot Allocation (Algorithm A) for class " |
| 306 | "%d\n", tbf->ms_class); |
| 307 | |
Andreas Eversberg | f298fa8 | 2012-07-13 14:50:57 +0200 | [diff] [blame] | 308 | pdch = &bts->trx[tbf->trx].pdch[ts]; |
| 309 | if (!pdch->enable) { |
| 310 | LOGP(DRLCMAC, LOGL_ERROR, "TS=%d not enabled.", ts); |
| 311 | return -EIO; |
| 312 | } |
| 313 | tbf->tsc = pdch->tsc; |
| 314 | if (tbf->direction == GPRS_RLCMAC_UL_TBF) { |
| 315 | /* if TFI is free on TS */ |
| 316 | if (!pdch->ul_tbf[tbf->tfi]) { |
| 317 | /* if USF available */ |
| 318 | usf = find_free_usf(pdch, ts); |
| 319 | if (usf >= 0) { |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 320 | LOGP(DRLCMAC, LOGL_DEBUG, "- Assign uplink " |
Andreas Eversberg | f298fa8 | 2012-07-13 14:50:57 +0200 | [diff] [blame] | 321 | "TS=%d USF=%d\n", ts, usf); |
| 322 | pdch->ul_tbf[tbf->tfi] = tbf; |
| 323 | tbf->pdch[ts] = pdch; |
| 324 | } else { |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 325 | LOGP(DRLCMAC, LOGL_NOTICE, "- Failed " |
| 326 | "allocating TS=%d, no USF available\n", |
| 327 | ts); |
Andreas Eversberg | f298fa8 | 2012-07-13 14:50:57 +0200 | [diff] [blame] | 328 | return -EBUSY; |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 329 | } |
| 330 | } else { |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 331 | LOGP(DRLCMAC, LOGL_NOTICE, "- Failed allocating " |
Andreas Eversberg | f298fa8 | 2012-07-13 14:50:57 +0200 | [diff] [blame] | 332 | "TS=%d, TFI is not available\n", ts); |
| 333 | return -EBUSY; |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 334 | } |
Andreas Eversberg | f298fa8 | 2012-07-13 14:50:57 +0200 | [diff] [blame] | 335 | } else { |
| 336 | /* if TFI is free on TS */ |
| 337 | if (!pdch->dl_tbf[tbf->tfi]) { |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 338 | LOGP(DRLCMAC, LOGL_DEBUG, "- Assign downlink TS=%d\n", |
Andreas Eversberg | f298fa8 | 2012-07-13 14:50:57 +0200 | [diff] [blame] | 339 | ts); |
| 340 | pdch->dl_tbf[tbf->tfi] = tbf; |
| 341 | tbf->pdch[ts] = pdch; |
| 342 | } else { |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 343 | LOGP(DRLCMAC, LOGL_NOTICE, "- Failed allocating " |
Andreas Eversberg | f298fa8 | 2012-07-13 14:50:57 +0200 | [diff] [blame] | 344 | "TS=%d, TFI is not available\n", ts); |
| 345 | return -EBUSY; |
| 346 | } |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 347 | } |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 348 | /* the only one TS is the common TS */ |
| 349 | tbf->first_common_ts = ts; |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 350 | |
Andreas Eversberg | f298fa8 | 2012-07-13 14:50:57 +0200 | [diff] [blame] | 351 | return 0; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 352 | } |
| 353 | |
Andreas Eversberg | 53f4725 | 2012-07-15 07:10:10 +0200 | [diff] [blame] | 354 | /* Slot Allocation: Algorithm B |
| 355 | * |
| 356 | * Assign as many downlink slots as possible. |
| 357 | * Assign one uplink slot. (With free USF) |
| 358 | * |
| 359 | */ |
| 360 | int alloc_algorithm_b(struct gprs_rlcmac_tbf *old_tbf, |
| 361 | struct gprs_rlcmac_tbf *tbf, uint32_t cust) |
| 362 | { |
| 363 | struct gprs_rlcmac_bts *bts = gprs_rlcmac_bts; |
| 364 | struct gprs_rlcmac_pdch *pdch; |
| 365 | struct gprs_ms_multislot_class *ms_class; |
| 366 | uint8_t Rx, Tx, Sum; /* Maximum Number of Slots: RX, Tx, Sum Rx+Tx */ |
| 367 | uint8_t Tta, Ttb, Tra, Trb, Tt, Tr; /* Minimum Number of Slots */ |
| 368 | uint8_t Type; /* Type of Mobile */ |
| 369 | uint8_t rx_win_min, rx_win_max; |
| 370 | uint8_t tx_win_min, tx_win_max, tx_range; |
| 371 | uint8_t rx_window = 0, tx_window = 0; |
| 372 | const char *digit[10] = { "0","1","2","3","4","5","6","7","8","9" }; |
Andreas Eversberg | ba1cd9b | 2012-07-25 09:14:09 +0200 | [diff] [blame] | 373 | int8_t usf[8] = { -1, -1, -1, -1, -1, -1, -1, -1 }; /* must be signed */ |
Andreas Eversberg | 53f4725 | 2012-07-15 07:10:10 +0200 | [diff] [blame] | 374 | int8_t tsc = -1; /* must be signed */ |
| 375 | uint8_t i, ts; |
| 376 | |
| 377 | LOGP(DRLCMAC, LOGL_DEBUG, "Slot Allocation (Algorithm B) for class " |
| 378 | "%d\n", tbf->ms_class); |
| 379 | |
| 380 | if (tbf->ms_class >= 32) { |
| 381 | LOGP(DRLCMAC, LOGL_ERROR, "Multislot class %d out of range.\n", |
| 382 | tbf->ms_class); |
| 383 | return -EINVAL; |
| 384 | } |
| 385 | |
| 386 | ms_class = &gprs_ms_multislot_class[tbf->ms_class]; |
| 387 | if (ms_class->tx == MS_NA) { |
| 388 | LOGP(DRLCMAC, LOGL_NOTICE, "Multislot class %d not " |
| 389 | "applicable.\n", tbf->ms_class); |
| 390 | return -EINVAL; |
| 391 | } |
| 392 | |
| 393 | Rx = ms_class->rx; |
| 394 | Tx = ms_class->tx; |
| 395 | Sum = ms_class->sum; |
| 396 | Tta = ms_class->ta; |
| 397 | Ttb = ms_class->tb; |
| 398 | Tra = ms_class->ra; |
| 399 | Trb = ms_class->rb; |
| 400 | Type = ms_class->type; |
| 401 | |
| 402 | /* Tta and Ttb may depend on hopping or frequency change */ |
| 403 | if (Ttb == MS_A) { |
| 404 | if (/* FIXME: hopping*/ 0) |
| 405 | Ttb = 1; |
| 406 | else |
| 407 | Ttb = 0; |
| 408 | } |
| 409 | if (Trb == MS_A) { |
| 410 | if (/* FIXME: hopping*/ 0) |
| 411 | Ttb = 1; |
| 412 | else |
| 413 | Ttb = 0; |
| 414 | } |
| 415 | if (Ttb == MS_B) { |
| 416 | /* FIXME: or frequency change */ |
| 417 | if (/* FIXME: hopping*/ 0) |
| 418 | Ttb = 1; |
| 419 | else |
| 420 | Ttb = 0; |
| 421 | } |
| 422 | if (Trb == MS_C) { |
| 423 | /* FIXME: or frequency change */ |
| 424 | if (/* FIXME: hopping*/ 0) |
| 425 | Ttb = 1; |
| 426 | else |
| 427 | Ttb = 0; |
| 428 | } |
| 429 | |
| 430 | LOGP(DRLCMAC, LOGL_DEBUG, "- Rx=%d Tx=%d Sum Rx+Tx=%s Tta=%s Ttb=%d " |
| 431 | " Tra=%d Trb=%d Type=%d\n", Rx, Tx, |
| 432 | (Sum == MS_NA) ? "N/A" : digit[Sum], |
| 433 | (Tta == MS_NA) ? "N/A" : digit[Tta], Ttb, Tra, Trb, Type); |
| 434 | |
| 435 | /* select the values for time contraints */ |
| 436 | if (/* FIXME: monitoring */0) { |
| 437 | /* applicable to type 1 and type 2 */ |
| 438 | Tt = Ttb; |
| 439 | Tr = Tra; |
| 440 | } else { |
| 441 | /* applicable to type 1 and type 2 */ |
| 442 | Tt = Ttb; |
| 443 | Tr = Trb; |
| 444 | } |
| 445 | |
| 446 | /* select a window of Rx slots if available |
| 447 | * The maximum allowed slots depend on RX or the window of available |
| 448 | * slots. |
| 449 | * This must be done for uplink TBF also, because it is the basis |
| 450 | * for calculating control slot and uplink slot(s). */ |
| 451 | rx_win_min = rx_win_max = tbf->first_ts; |
| 452 | for (ts = tbf->first_ts, i = 0; ts < 8; ts++) { |
| 453 | pdch = &bts->trx[tbf->trx].pdch[ts]; |
| 454 | /* check if enabled */ |
| 455 | if (!pdch->enable) { |
| 456 | LOGP(DRLCMAC, LOGL_DEBUG, "- Skipping TS %d, because " |
| 457 | "not enabled\n", ts); |
| 458 | /* increase window for Type 1 */ |
| 459 | if (Type == 1) |
| 460 | i++; |
| 461 | continue; |
| 462 | } |
| 463 | /* check if TSC changes */ |
| 464 | if (tsc < 0) |
| 465 | tbf->tsc = tsc = pdch->tsc; |
| 466 | else if (tsc != pdch->tsc) { |
| 467 | LOGP(DRLCMAC, LOGL_ERROR, "Skipping TS %d of TRX=%d, " |
| 468 | "because it has different TSC than lower TS " |
| 469 | "of TRX. In order to allow multislot, all " |
| 470 | "slots must be configured with the same " |
| 471 | "TSC!\n", ts, tbf->trx); |
| 472 | /* increase window for Type 1 */ |
| 473 | if (Type == 1) |
| 474 | i++; |
| 475 | continue; |
| 476 | } |
| 477 | /* check if TFI for slot is available |
| 478 | * This is only possible for downlink TFI. */ |
| 479 | if (tbf->direction == GPRS_RLCMAC_DL_TBF |
| 480 | && pdch->dl_tbf[tbf->tfi]) { |
| 481 | LOGP(DRLCMAC, LOGL_DEBUG, "- Skipping TS %d, because " |
| 482 | "already assigned to other DL TBF with " |
| 483 | "TFI=%d\n", ts, tbf->tfi); |
| 484 | /* increase window for Type 1 */ |
| 485 | if (Type == 1) |
| 486 | i++; |
| 487 | continue; |
| 488 | } |
| 489 | |
| 490 | rx_window |= (1 << ts); |
| 491 | LOGP(DRLCMAC, LOGL_DEBUG, "- Selected DL TS %d\n", ts); |
| 492 | |
| 493 | /* range of window (required for Type 1) */ |
| 494 | rx_win_max = ts; |
| 495 | |
| 496 | if (++i == Rx) { |
| 497 | LOGP(DRLCMAC, LOGL_DEBUG, "- Done, because slots / " |
| 498 | "window reached maximum alowed Rx size\n"); |
| 499 | break; |
| 500 | } |
| 501 | } |
| 502 | |
| 503 | LOGP(DRLCMAC, LOGL_DEBUG, "- Selected slots for RX: " |
| 504 | "(TS=0)\"%c%c%c%c%c%c%c%c\"(TS=7)\n", |
| 505 | ((rx_window & 0x01)) ? 'D' : '.', |
| 506 | ((rx_window & 0x02)) ? 'D' : '.', |
| 507 | ((rx_window & 0x04)) ? 'D' : '.', |
| 508 | ((rx_window & 0x08)) ? 'D' : '.', |
| 509 | ((rx_window & 0x10)) ? 'D' : '.', |
| 510 | ((rx_window & 0x20)) ? 'D' : '.', |
| 511 | ((rx_window & 0x40)) ? 'D' : '.', |
| 512 | ((rx_window & 0x80)) ? 'D' : '.'); |
| 513 | |
| 514 | /* reduce window, if existing uplink slots collide RX window */ |
| 515 | if (Type == 1 && old_tbf && old_tbf->direction == GPRS_RLCMAC_UL_TBF) { |
| 516 | uint8_t collide = 0, ul_usage = 0; |
| 517 | int j; |
| 518 | |
| 519 | /* calculate mask of colliding slots */ |
| 520 | for (ts = old_tbf->first_ts; ts < 8; ts++) { |
| 521 | if (old_tbf->pdch[ts]) { |
| 522 | ul_usage |= (1 << ts); |
| 523 | /* mark bits from TS-t .. TS+r */ |
| 524 | for (j = ts - Tt; j != ((ts + Tr + 1) & 7); |
| 525 | j = (j + 1) & 7) |
| 526 | collide |= (1 << j); |
| 527 | } |
| 528 | } |
| 529 | LOGP(DRLCMAC, LOGL_DEBUG, "- Not allowed slots due to existing " |
| 530 | "UL allocation: (TS=0)\"%c%c%c%c%c%c%c%c\"(TS=7) " |
| 531 | " D=downlink x=not usable\n", |
| 532 | ((ul_usage & 0x01)) ? 'D' : ((collide & 0x01))?'x':'.', |
| 533 | ((ul_usage & 0x02)) ? 'D' : ((collide & 0x02))?'x':'.', |
| 534 | ((ul_usage & 0x04)) ? 'D' : ((collide & 0x04))?'x':'.', |
| 535 | ((ul_usage & 0x08)) ? 'D' : ((collide & 0x08))?'x':'.', |
| 536 | ((ul_usage & 0x10)) ? 'D' : ((collide & 0x10))?'x':'.', |
| 537 | ((ul_usage & 0x20)) ? 'D' : ((collide & 0x20))?'x':'.', |
| 538 | ((ul_usage & 0x40)) ? 'D' : ((collide & 0x40))?'x':'.', |
| 539 | ((ul_usage & 0x80)) ? 'D' : ((collide & 0x80))?'x':'.'); |
| 540 | |
| 541 | /* apply massk to reduce tx_window (shifted by 3 slots) */ |
| 542 | rx_window &= ~(collide << 3); |
| 543 | rx_window &= ~(collide >> 5); |
| 544 | LOGP(DRLCMAC, LOGL_DEBUG, "- Remaining slots for RX: " |
| 545 | "(TS=0)\"%c%c%c%c%c%c%c%c\"(TS=7)\n", |
| 546 | ((rx_window & 0x01)) ? 'D' : '.', |
| 547 | ((rx_window & 0x02)) ? 'D' : '.', |
| 548 | ((rx_window & 0x04)) ? 'D' : '.', |
| 549 | ((rx_window & 0x08)) ? 'D' : '.', |
| 550 | ((rx_window & 0x10)) ? 'D' : '.', |
| 551 | ((rx_window & 0x20)) ? 'D' : '.', |
| 552 | ((rx_window & 0x40)) ? 'D' : '.', |
| 553 | ((rx_window & 0x80)) ? 'D' : '.'); |
| 554 | if (!rx_window) { |
| 555 | LOGP(DRLCMAC, LOGL_NOTICE, "No suitable downlink slots " |
| 556 | "available with current uplink assignment\n"); |
| 557 | return -EBUSY; |
| 558 | } |
| 559 | |
| 560 | /* calculate new min/max */ |
| 561 | for (ts = rx_win_min; ts <= rx_win_max; ts++) { |
| 562 | if ((rx_window & (1 << ts))) |
| 563 | break; |
| 564 | rx_win_min = ts + 1; |
Andreas Eversberg | 52c748c | 2012-07-15 16:33:02 +0200 | [diff] [blame] | 565 | LOGP(DRLCMAC, LOGL_DEBUG, "- TS has been deleted, so " |
Andreas Eversberg | 53f4725 | 2012-07-15 07:10:10 +0200 | [diff] [blame] | 566 | "raising start of DL window to %d\n", |
| 567 | rx_win_min); |
| 568 | } |
| 569 | for (ts = rx_win_max; ts >= rx_win_min; ts--) { |
| 570 | if ((rx_window & (1 << ts))) |
| 571 | break; |
| 572 | rx_win_max = ts - 1; |
Andreas Eversberg | 52c748c | 2012-07-15 16:33:02 +0200 | [diff] [blame] | 573 | LOGP(DRLCMAC, LOGL_DEBUG, "- TS has been deleted, so " |
Andreas Eversberg | 53f4725 | 2012-07-15 07:10:10 +0200 | [diff] [blame] | 574 | "lowering end of DL window to %d\n", |
| 575 | rx_win_max); |
| 576 | } |
| 577 | } |
| 578 | |
| 579 | /* reduce window, to allow at least one uplink TX slot |
| 580 | * this is only required for Type 1 */ |
| 581 | if (Type == 1 && rx_win_max - rx_win_min + 1 + Tt + 1 + Tr > 8) { |
| 582 | rx_win_max = rx_win_min + 7 - Tr - 1 - Tr; |
| 583 | LOGP(DRLCMAC, LOGL_DEBUG, "- Reduce RX window due to time " |
| 584 | "contraints to %d slots\n", |
| 585 | rx_win_max - rx_win_min + 1); |
| 586 | } |
| 587 | |
| 588 | LOGP(DRLCMAC, LOGL_DEBUG, "- RX-Window is: %d..%d\n", rx_win_min, |
| 589 | rx_win_max); |
| 590 | |
| 591 | /* calculate TX window */ |
| 592 | if (Type == 1) { |
| 593 | /* calculate TX window (shifted by 3 timeslots) |
| 594 | * it uses the space between tx_win_max and tx_win_min */ |
| 595 | tx_win_min = (rx_win_max - 2 + Tt) & 7; |
| 596 | tx_win_max = (rx_win_min + 4 - Tr) & 7; |
| 597 | /* calculate the TX window size (might be larger than Tx) */ |
| 598 | tx_range = (tx_win_max - tx_win_min + 1) & 7; |
| 599 | } else { |
| 600 | /* TX and RX simultaniously */ |
| 601 | tx_win_min = rx_win_min; |
| 602 | tx_win_max = 7; |
| 603 | /* TX window size (might be larger than Tx) */ |
| 604 | tx_range = tx_win_max - tx_win_min + 1; |
| 605 | } |
| 606 | |
| 607 | LOGP(DRLCMAC, LOGL_DEBUG, "- TX-Window is: %d..%d\n", tx_win_min, |
| 608 | tx_win_max); |
| 609 | |
| 610 | /* select a window of Tx slots if available |
| 611 | * The maximum allowed slots depend on TX or the window of available |
| 612 | * slots. */ |
| 613 | if (tbf->direction == GPRS_RLCMAC_UL_TBF) { |
| 614 | for (ts = tx_win_min, i = 0; i < tx_range; ts = (ts + 1) & 7) { |
| 615 | pdch = &bts->trx[tbf->trx].pdch[ts]; |
| 616 | /* check if enabled */ |
| 617 | if (!pdch->enable) { |
| 618 | LOGP(DRLCMAC, LOGL_DEBUG, "- Skipping TS %d, " |
| 619 | "because not enabled\n", ts); |
| 620 | continue; |
| 621 | } |
| 622 | /* check if TSC changes */ |
| 623 | if (tsc < 0) |
| 624 | tbf->tsc = tsc = pdch->tsc; |
| 625 | else if (tsc != pdch->tsc) { |
| 626 | LOGP(DRLCMAC, LOGL_ERROR, "Skipping TS %d of " |
| 627 | "TRX=%d, because it has different TSC " |
| 628 | "than lower TS of TRX. In order to " |
| 629 | "allow multislot, all slots must be " |
| 630 | "configured with the same TSC!\n", |
| 631 | ts, tbf->trx); |
| 632 | /* increase window for Type 1 */ |
| 633 | if (Type == 1) |
| 634 | i++; |
| 635 | continue; |
| 636 | } |
| 637 | /* check if TFI for slot is available */ |
| 638 | if (pdch->ul_tbf[tbf->tfi]) { |
| 639 | LOGP(DRLCMAC, LOGL_DEBUG, "- Skipping TS %d, " |
| 640 | "because already assigned to other " |
| 641 | "UL TBF with TFI=%d\n", ts, tbf->tfi); |
| 642 | /* increase window for Type 1 */ |
| 643 | if (Type == 1) |
| 644 | i++; |
| 645 | continue; |
| 646 | } |
| 647 | /* check for free usf */ |
| 648 | usf[ts] = find_free_usf(pdch, ts); |
| 649 | if (usf[ts] < 0) { |
| 650 | LOGP(DRLCMAC, LOGL_DEBUG, "- Skipping TS %d, " |
| 651 | "because no USF available\n", ts); |
| 652 | /* increase window for Type 1 */ |
| 653 | if (Type == 1) |
| 654 | i++; |
| 655 | continue; |
| 656 | } |
| 657 | |
| 658 | tx_window |= (1 << ts); |
| 659 | LOGP(DRLCMAC, LOGL_DEBUG, "- Selected UL TS %d\n", ts); |
| 660 | |
| 661 | if (!(cust & 1)) { |
| 662 | LOGP(DRLCMAC, LOGL_DEBUG, "- Done, because " |
| 663 | "1 slot assigned\n"); |
| 664 | break; |
| 665 | } |
| 666 | if (++i == Tx) { |
| 667 | LOGP(DRLCMAC, LOGL_DEBUG, "- Done, because " |
| 668 | "slots / window reached maximum alowed " |
| 669 | "Tx size\n"); |
| 670 | break; |
| 671 | } |
| 672 | } |
| 673 | |
| 674 | LOGP(DRLCMAC, LOGL_DEBUG, "- Selected TX window: " |
| 675 | "(TS=0)\"%c%c%c%c%c%c%c%c\"(TS=7)\n", |
| 676 | ((tx_window & 0x01)) ? 'U' : '.', |
| 677 | ((tx_window & 0x02)) ? 'U' : '.', |
| 678 | ((tx_window & 0x04)) ? 'U' : '.', |
| 679 | ((tx_window & 0x08)) ? 'U' : '.', |
| 680 | ((tx_window & 0x10)) ? 'U' : '.', |
| 681 | ((tx_window & 0x20)) ? 'U' : '.', |
| 682 | ((tx_window & 0x40)) ? 'U' : '.', |
| 683 | ((tx_window & 0x80)) ? 'U' : '.'); |
| 684 | |
| 685 | if (!tx_window) { |
| 686 | LOGP(DRLCMAC, LOGL_NOTICE, "No suitable uplink slots " |
| 687 | "available\n"); |
| 688 | return -EBUSY; |
| 689 | } |
| 690 | } |
| 691 | |
| 692 | if (tbf->direction == GPRS_RLCMAC_DL_TBF) { |
Andreas Eversberg | 52c748c | 2012-07-15 16:33:02 +0200 | [diff] [blame] | 693 | uint8_t slotcount = 0; |
| 694 | |
Andreas Eversberg | 53f4725 | 2012-07-15 07:10:10 +0200 | [diff] [blame] | 695 | /* assign downlink */ |
| 696 | if (rx_window == 0) { |
| 697 | LOGP(DRLCMAC, LOGL_NOTICE, "No downlink slots " |
| 698 | "available\n"); |
| 699 | return -EINVAL; |
| 700 | } |
| 701 | for (ts = 0; ts < 8; ts++) { |
| 702 | if ((rx_window & (1 << ts))) { |
| 703 | LOGP(DRLCMAC, LOGL_DEBUG, "- Assigning DL TS " |
| 704 | "%d\n", ts); |
| 705 | pdch = &bts->trx[tbf->trx].pdch[ts]; |
| 706 | pdch->dl_tbf[tbf->tfi] = tbf; |
| 707 | tbf->pdch[ts] = pdch; |
Andreas Eversberg | 52c748c | 2012-07-15 16:33:02 +0200 | [diff] [blame] | 708 | slotcount++; |
Andreas Eversberg | 53f4725 | 2012-07-15 07:10:10 +0200 | [diff] [blame] | 709 | } |
| 710 | } |
Andreas Eversberg | 52c748c | 2012-07-15 16:33:02 +0200 | [diff] [blame] | 711 | if (slotcount) |
| 712 | LOGP(DRLCMAC, LOGL_INFO, "Using Multislot with %d " |
| 713 | "slots DL\n", slotcount); |
Andreas Eversberg | 53f4725 | 2012-07-15 07:10:10 +0200 | [diff] [blame] | 714 | } else { |
| 715 | /* assign uplink */ |
| 716 | if (tx_window == 0) { |
| 717 | LOGP(DRLCMAC, LOGL_NOTICE, "No uplink slots " |
| 718 | "available\n"); |
| 719 | return -EINVAL; |
| 720 | } |
| 721 | for (ts = 0; ts < 8; ts++) { |
| 722 | if ((tx_window & (1 << ts))) { |
| 723 | LOGP(DRLCMAC, LOGL_DEBUG, "- Assigning UL TS " |
| 724 | "%d\n", ts); |
| 725 | pdch = &bts->trx[tbf->trx].pdch[ts]; |
| 726 | pdch->ul_tbf[tbf->tfi] = tbf; |
| 727 | tbf->pdch[ts] = pdch; |
| 728 | tbf->dir.ul.usf[ts] = usf[ts]; |
| 729 | } |
| 730 | } |
| 731 | } |
| 732 | |
| 733 | /* the timeslot of the TX window start is always |
| 734 | * available in RX window */ |
| 735 | tbf->first_common_ts = tx_win_min; |
| 736 | |
| 737 | return 0; |
| 738 | } |
| 739 | |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 740 | static void tbf_unlink_pdch(struct gprs_rlcmac_tbf *tbf) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 741 | { |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 742 | struct gprs_rlcmac_pdch *pdch; |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 743 | int ts; |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 744 | |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 745 | if (tbf->direction == GPRS_RLCMAC_UL_TBF) { |
| 746 | for (ts = 0; ts < 8; ts++) { |
| 747 | pdch = tbf->pdch[ts]; |
| 748 | if (pdch) |
| 749 | pdch->ul_tbf[tbf->tfi] = NULL; |
| 750 | tbf->pdch[ts] = NULL; |
| 751 | } |
| 752 | } else { |
| 753 | for (ts = 0; ts < 8; ts++) { |
| 754 | pdch = tbf->pdch[ts]; |
| 755 | if (pdch) |
| 756 | pdch->dl_tbf[tbf->tfi] = NULL; |
| 757 | tbf->pdch[ts] = NULL; |
| 758 | } |
| 759 | } |
| 760 | } |
| 761 | |
| 762 | void tbf_free(struct gprs_rlcmac_tbf *tbf) |
| 763 | { |
| 764 | struct msgb *msg; |
| 765 | |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 766 | LOGP(DRLCMAC, LOGL_INFO, "Free %s TBF=%d with TLLI=0x%08x.\n", |
| 767 | (tbf->direction == GPRS_RLCMAC_UL_TBF) ? "UL" : "DL", tbf->tfi, |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 768 | tbf->tlli); |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 769 | if (tbf->ul_ass_state != GPRS_RLCMAC_UL_ASS_NONE) |
| 770 | LOGP(DRLCMAC, LOGL_ERROR, "Software error: Pending uplink " |
| 771 | "assignment. This may not happen, because the " |
| 772 | "assignment message never gets transmitted. Please " |
| 773 | "be shure not to free in this state. PLEASE FIX!\n"); |
| 774 | if (tbf->dl_ass_state != GPRS_RLCMAC_DL_ASS_NONE) |
| 775 | LOGP(DRLCMAC, LOGL_ERROR, "Software error: Pending downlink " |
| 776 | "assignment. This may not happen, because the " |
| 777 | "assignment message never gets transmitted. Please " |
| 778 | "be shure not to free in this state. PLEASE FIX!\n"); |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 779 | tbf_timer_stop(tbf); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 780 | while ((msg = msgb_dequeue(&tbf->llc_queue))) |
| 781 | msgb_free(msg); |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 782 | tbf_unlink_pdch(tbf); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 783 | llist_del(&tbf->list); |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 784 | LOGP(DRLCMAC, LOGL_DEBUG, "********** TBF ends here **********\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 785 | talloc_free(tbf); |
| 786 | } |
| 787 | |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 788 | int tbf_update(struct gprs_rlcmac_tbf *tbf) |
| 789 | { |
| 790 | struct gprs_rlcmac_bts *bts = gprs_rlcmac_bts; |
| 791 | struct gprs_rlcmac_tbf *ul_tbf = NULL; |
| 792 | int rc; |
| 793 | |
| 794 | LOGP(DRLCMAC, LOGL_DEBUG, "********** TBF update **********\n"); |
| 795 | |
| 796 | if (tbf->direction != GPRS_RLCMAC_DL_TBF) |
| 797 | return -EINVAL; |
| 798 | |
| 799 | if (!tbf->ms_class) { |
| 800 | LOGP(DRLCMAC, LOGL_DEBUG, "- Cannot update, no class\n"); |
| 801 | return -EINVAL; |
| 802 | } |
| 803 | |
Andreas Eversberg | a9b9407 | 2012-07-15 19:30:41 +0200 | [diff] [blame] | 804 | ul_tbf = tbf_by_tlli(tbf->tlli, GPRS_RLCMAC_UL_TBF); |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 805 | |
| 806 | tbf_unlink_pdch(tbf); |
| 807 | rc = bts->alloc_algorithm(ul_tbf, tbf, bts->alloc_algorithm_curst); |
| 808 | /* if no ressource */ |
| 809 | if (rc < 0) { |
| 810 | LOGP(DRLCMAC, LOGL_ERROR, "No ressource after update???\n"); |
| 811 | return -rc; |
| 812 | } |
| 813 | |
| 814 | return 0; |
| 815 | } |
| 816 | |
| 817 | int tbf_assign_control_ts(struct gprs_rlcmac_tbf *tbf) |
| 818 | { |
| 819 | if (tbf->control_ts == 0xff) |
| 820 | LOGP(DRLCMAC, LOGL_DEBUG, "- Setting Control TS %d\n", |
Andreas Eversberg | 52c748c | 2012-07-15 16:33:02 +0200 | [diff] [blame] | 821 | tbf->first_common_ts); |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 822 | else if (tbf->control_ts != tbf->first_common_ts) |
| 823 | LOGP(DRLCMAC, LOGL_DEBUG, "- Changing Control TS %d\n", |
Andreas Eversberg | 52c748c | 2012-07-15 16:33:02 +0200 | [diff] [blame] | 824 | tbf->first_common_ts); |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 825 | tbf->control_ts = tbf->first_common_ts; |
| 826 | |
| 827 | return 0; |
| 828 | } |
| 829 | |
| 830 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 831 | const char *tbf_state_name[] = { |
| 832 | "NULL", |
| 833 | "ASSIGN", |
| 834 | "FLOW", |
| 835 | "FINISHED", |
| 836 | "WAIT RELEASE", |
| 837 | "RELEASING", |
| 838 | }; |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame] | 839 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 840 | void tbf_new_state(struct gprs_rlcmac_tbf *tbf, |
| 841 | enum gprs_rlcmac_tbf_state state) |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 842 | { |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 843 | LOGP(DRLCMAC, LOGL_DEBUG, "%s TBF=%d changes state from %s to %s\n", |
| 844 | (tbf->direction == GPRS_RLCMAC_UL_TBF) ? "UL" : "DL", tbf->tfi, |
| 845 | tbf_state_name[tbf->state], tbf_state_name[state]); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 846 | tbf->state = state; |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame] | 847 | } |
| 848 | |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 849 | void tbf_timer_start(struct gprs_rlcmac_tbf *tbf, unsigned int T, |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 850 | unsigned int seconds, unsigned int microseconds) |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame] | 851 | { |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 852 | if (!osmo_timer_pending(&tbf->timer)) |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 853 | LOGP(DRLCMAC, LOGL_DEBUG, "Starting %s TBF=%d timer %u.\n", |
| 854 | (tbf->direction == GPRS_RLCMAC_UL_TBF) ? "UL" : "DL", |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 855 | tbf->tfi, T); |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame] | 856 | else |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 857 | LOGP(DRLCMAC, LOGL_DEBUG, "Restarting %s TBF=%d timer %u " |
| 858 | "while old timer %u pending \n", |
| 859 | (tbf->direction == GPRS_RLCMAC_UL_TBF) ? "UL" : "DL", |
| 860 | tbf->tfi, T, tbf->T); |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame] | 861 | |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 862 | tbf->T = T; |
| 863 | tbf->num_T_exp = 0; |
| 864 | |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 865 | /* Tunning timers can be safely re-scheduled. */ |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 866 | tbf->timer.data = tbf; |
| 867 | tbf->timer.cb = &tbf_timer_cb; |
| 868 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 869 | osmo_timer_schedule(&tbf->timer, seconds, microseconds); |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 870 | } |
| 871 | |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 872 | void tbf_timer_stop(struct gprs_rlcmac_tbf *tbf) |
| 873 | { |
| 874 | if (osmo_timer_pending(&tbf->timer)) { |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 875 | LOGP(DRLCMAC, LOGL_DEBUG, "Stopping %s TBF=%d timer %u.\n", |
| 876 | (tbf->direction == GPRS_RLCMAC_UL_TBF) ? "UL" : "DL", |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 877 | tbf->tfi, tbf->T); |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 878 | osmo_timer_del(&tbf->timer); |
| 879 | } |
| 880 | } |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 881 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 882 | #if 0 |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 883 | static void tbf_gsm_timer_cb(void *_tbf) |
| 884 | { |
| 885 | struct gprs_rlcmac_tbf *tbf = (struct gprs_rlcmac_tbf *)_tbf; |
| 886 | |
| 887 | tbf->num_fT_exp++; |
| 888 | |
| 889 | switch (tbf->fT) { |
| 890 | case 0: |
Ivan Kluchnikov | ef7f28c | 2012-07-12 14:49:15 +0400 | [diff] [blame] | 891 | hier alles berdenken |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 892 | // This is timer for delay RLC/MAC data sending after Downlink Immediate Assignment on CCCH. |
| 893 | gprs_rlcmac_segment_llc_pdu(tbf); |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 894 | LOGP(DRLCMAC, LOGL_NOTICE, "TBF: [DOWNLINK] END TFI: %u TLLI: 0x%08x \n", tbf->tfi, tbf->tlli); |
Ivan Kluchnikov | 9c795ab | 2012-05-24 23:12:59 +0400 | [diff] [blame] | 895 | tbf_free(tbf); |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 896 | break; |
| 897 | default: |
Ivan Kluchnikov | 856221f | 2012-06-15 09:31:29 +0400 | [diff] [blame] | 898 | LOGP(DRLCMAC, LOGL_NOTICE, "Timer expired in unknown mode: %u \n", tbf->fT); |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 899 | } |
| 900 | } |
| 901 | |
| 902 | static void tbf_gsm_timer_start(struct gprs_rlcmac_tbf *tbf, unsigned int fT, |
| 903 | int frames) |
| 904 | { |
| 905 | if (osmo_gsm_timer_pending(&tbf->gsm_timer)) |
Ivan Kluchnikov | 856221f | 2012-06-15 09:31:29 +0400 | [diff] [blame] | 906 | LOGP(DRLCMAC, LOGL_NOTICE, "Starting TBF timer %u while old timer %u pending \n", fT, tbf->fT); |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 907 | tbf->fT = fT; |
| 908 | tbf->num_fT_exp = 0; |
| 909 | |
| 910 | /* FIXME: we should do this only once ? */ |
| 911 | tbf->gsm_timer.data = tbf; |
| 912 | tbf->gsm_timer.cb = &tbf_gsm_timer_cb; |
| 913 | |
| 914 | osmo_gsm_timer_schedule(&tbf->gsm_timer, frames); |
| 915 | } |
| 916 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 917 | eine stop-funktion, auch im tbf_free aufrufen |
| 918 | |
| 919 | #endif |
| 920 | |
| 921 | #if 0 |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 922 | void gprs_rlcmac_enqueue_block(bitvec *block, int len) |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame] | 923 | { |
| 924 | struct msgb *msg = msgb_alloc(len, "rlcmac_dl"); |
| 925 | bitvec_pack(block, msgb_put(msg, len)); |
| 926 | msgb_enqueue(&block_queue, msg); |
| 927 | } |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 928 | #endif |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame] | 929 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 930 | /* received RLC/MAC block from L1 */ |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 931 | int gprs_rlcmac_rcv_block(uint8_t trx, uint8_t ts, uint8_t *data, uint8_t len, |
| 932 | uint32_t fn) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 933 | { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 934 | unsigned payload = data[0] >> 6; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 935 | int rc = 0; |
Ivan Kluchnikov | 34460b8 | 2012-06-27 18:41:04 +0400 | [diff] [blame] | 936 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 937 | switch (payload) { |
| 938 | case GPRS_RLCMAC_DATA_BLOCK: |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 939 | rc = gprs_rlcmac_rcv_data_block_acknowledged(trx, ts, data, |
| 940 | len); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 941 | break; |
| 942 | case GPRS_RLCMAC_CONTROL_BLOCK: |
Andreas Eversberg | fc1dfd8 | 2012-07-26 10:50:23 +0200 | [diff] [blame^] | 943 | rc = gprs_rlcmac_rcv_control_block(trx, ts, fn, data, len); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 944 | break; |
| 945 | case GPRS_RLCMAC_CONTROL_BLOCK_OPT: |
| 946 | LOGP(DRLCMAC, LOGL_NOTICE, "GPRS_RLCMAC_CONTROL_BLOCK_OPT block payload is not supported.\n"); |
| 947 | default: |
| 948 | LOGP(DRLCMAC, LOGL_NOTICE, "Unknown RLCMAC block payload.\n"); |
| 949 | rc = -EINVAL; |
Ivan Kluchnikov | 34460b8 | 2012-06-27 18:41:04 +0400 | [diff] [blame] | 950 | } |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 951 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 952 | return rc; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 953 | } |
| 954 | |
Andreas Eversberg | 2b91464 | 2012-07-19 13:06:26 +0200 | [diff] [blame] | 955 | /* add paging to paging queue(s) */ |
| 956 | int gprs_rlcmac_add_paging(uint8_t chan_needed, uint8_t *identity_lv) |
| 957 | { |
| 958 | struct gprs_rlcmac_bts *bts = gprs_rlcmac_bts; |
| 959 | uint8_t l, trx, ts, any_tbf = 0; |
| 960 | struct gprs_rlcmac_tbf *tbf; |
| 961 | struct gprs_rlcmac_paging *pag; |
| 962 | uint8_t slot_mask[8]; |
| 963 | int8_t first_ts; /* must be signed */ |
| 964 | |
Andreas Eversberg | 3b7461c | 2012-07-20 11:19:59 +0200 | [diff] [blame] | 965 | LOGP(DRLCMAC, LOGL_INFO, "Add RR paging: chan-needed=%d MI=%s\n", |
| 966 | chan_needed, osmo_hexdump(identity_lv + 1, identity_lv[0])); |
Andreas Eversberg | 2b91464 | 2012-07-19 13:06:26 +0200 | [diff] [blame] | 967 | |
| 968 | /* collect slots to page |
| 969 | * Mark slots for every TBF, but only mark one of it. |
| 970 | * Mark only the first slot found. |
| 971 | * Don't mark, if TBF uses a different slot that is already marked. */ |
| 972 | memset(slot_mask, 0, sizeof(slot_mask)); |
| 973 | for (l = 0; gprs_rlcmac_tbfs_lists[l]; l++) { |
| 974 | llist_for_each_entry(tbf, gprs_rlcmac_tbfs_lists[l], list) { |
| 975 | first_ts = -1; |
| 976 | for (ts = 0; ts < 8; ts++) { |
| 977 | if (tbf->pdch[ts]) { |
| 978 | /* remember the first slot found */ |
| 979 | if (first_ts < 0) |
| 980 | first_ts = ts; |
| 981 | /* break, if we already marked a slot */ |
| 982 | if ((slot_mask[tbf->trx] & (1 << ts))) |
| 983 | break; |
| 984 | } |
| 985 | } |
| 986 | /* mark first slot found, if none is marked already */ |
| 987 | if (ts == 8 && first_ts >= 0) { |
| 988 | LOGP(DRLCMAC, LOGL_DEBUG, "- %s TBF=%d uses " |
| 989 | "TRX=%d TS=%d, so we mark\n", |
| 990 | (tbf->direction == GPRS_RLCMAC_UL_TBF) |
| 991 | ? "UL" : "DL", |
Andreas Eversberg | 3b7461c | 2012-07-20 11:19:59 +0200 | [diff] [blame] | 992 | tbf->tfi, tbf->trx, first_ts); |
Andreas Eversberg | 2b91464 | 2012-07-19 13:06:26 +0200 | [diff] [blame] | 993 | slot_mask[tbf->trx] |= (1 << first_ts); |
| 994 | } else |
| 995 | LOGP(DRLCMAC, LOGL_DEBUG, "- %s TBF=%d uses " |
| 996 | "already marked TRX=%d TS=%d\n", |
| 997 | (tbf->direction == GPRS_RLCMAC_UL_TBF) |
| 998 | ? "UL" : "DL", |
| 999 | tbf->tfi, tbf->trx, ts); |
| 1000 | } |
| 1001 | } |
| 1002 | |
| 1003 | /* Now we have a list of marked slots. Every TBF uses at least one |
| 1004 | * of these slots. */ |
| 1005 | |
| 1006 | /* schedule paging to all marked slots */ |
| 1007 | for (trx = 0; trx < 8; trx++) { |
| 1008 | if (slot_mask[trx] == 0) |
| 1009 | continue; |
| 1010 | any_tbf = 1; |
| 1011 | for (ts = 0; ts < 8; ts++) { |
| 1012 | if ((slot_mask[trx] & (1 << ts))) { |
| 1013 | /* schedule */ |
Andreas Eversberg | 6681bb8 | 2012-07-25 08:48:44 +0200 | [diff] [blame] | 1014 | pag = talloc_zero(tall_pcu_ctx, |
Andreas Eversberg | 2b91464 | 2012-07-19 13:06:26 +0200 | [diff] [blame] | 1015 | struct gprs_rlcmac_paging); |
| 1016 | if (!pag) |
| 1017 | return -ENOMEM; |
| 1018 | pag->chan_needed = chan_needed; |
| 1019 | memcpy(pag->identity_lv, identity_lv, |
| 1020 | identity_lv[0] + 1); |
| 1021 | llist_add(&pag->list, |
| 1022 | &bts->trx[trx].pdch[ts].paging_list); |
Andreas Eversberg | 3b7461c | 2012-07-20 11:19:59 +0200 | [diff] [blame] | 1023 | LOGP(DRLCMAC, LOGL_INFO, "Paging on PACCH of " |
| 1024 | "TRX=%d TS=%d\n", trx, ts); |
Andreas Eversberg | 2b91464 | 2012-07-19 13:06:26 +0200 | [diff] [blame] | 1025 | } |
| 1026 | } |
| 1027 | } |
| 1028 | |
Andreas Eversberg | 3b7461c | 2012-07-20 11:19:59 +0200 | [diff] [blame] | 1029 | if (!any_tbf) |
Andreas Eversberg | 2b91464 | 2012-07-19 13:06:26 +0200 | [diff] [blame] | 1030 | LOGP(DRLCMAC, LOGL_INFO, "No paging, because no TBF\n"); |
Andreas Eversberg | 2b91464 | 2012-07-19 13:06:26 +0200 | [diff] [blame] | 1031 | |
| 1032 | return 0; |
| 1033 | } |
| 1034 | |
| 1035 | struct gprs_rlcmac_paging *gprs_rlcmac_dequeue_paging( |
| 1036 | struct gprs_rlcmac_pdch *pdch) |
| 1037 | { |
| 1038 | struct gprs_rlcmac_paging *pag; |
| 1039 | |
Andreas Eversberg | 3b7461c | 2012-07-20 11:19:59 +0200 | [diff] [blame] | 1040 | if (llist_empty(&pdch->paging_list)) |
| 1041 | return NULL; |
Andreas Eversberg | 2b91464 | 2012-07-19 13:06:26 +0200 | [diff] [blame] | 1042 | pag = llist_entry(pdch->paging_list.next, |
| 1043 | struct gprs_rlcmac_paging, list); |
| 1044 | llist_del(&pag->list); |
| 1045 | |
| 1046 | return pag; |
| 1047 | } |
| 1048 | |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 1049 | /* Send Uplink unit-data to SGSN. */ |
Andreas Eversberg | 3e372d5 | 2012-07-06 09:28:15 +0200 | [diff] [blame] | 1050 | int gprs_rlcmac_tx_ul_ud(gprs_rlcmac_tbf *tbf) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 1051 | { |
| 1052 | const uint8_t qos_profile = QOS_PROFILE; |
| 1053 | struct msgb *llc_pdu; |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 1054 | unsigned msg_len = NS_HDR_LEN + BSSGP_HDR_LEN + tbf->llc_index; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 1055 | |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 1056 | LOGP(DBSSGP, LOGL_INFO, "LLC [PCU -> SGSN] TFI: %u TLLI: 0x%08x len=%d\n", tbf->tfi, tbf->tlli, tbf->llc_index); |
Andreas Eversberg | 3e372d5 | 2012-07-06 09:28:15 +0200 | [diff] [blame] | 1057 | if (!bctx) { |
| 1058 | LOGP(DBSSGP, LOGL_ERROR, "No bctx\n"); |
| 1059 | return -EIO; |
| 1060 | } |
Ivan Kluchnikov | c320d86 | 2012-03-18 15:04:48 +0400 | [diff] [blame] | 1061 | |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 1062 | llc_pdu = msgb_alloc_headroom(msg_len, msg_len,"llc_pdu"); |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 1063 | msgb_tvlv_push(llc_pdu, BSSGP_IE_LLC_PDU, sizeof(uint8_t)*tbf->llc_index, tbf->llc_frame); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 1064 | bssgp_tx_ul_ud(bctx, tbf->tlli, &qos_profile, llc_pdu); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 1065 | |
Andreas Eversberg | 3e372d5 | 2012-07-06 09:28:15 +0200 | [diff] [blame] | 1066 | return 0; |
Ivan Kluchnikov | c7e7f68 | 2012-06-29 22:53:15 +0400 | [diff] [blame] | 1067 | } |