| /* |
| * Copyright (C) 2013 by Holger Hans Peter Freyther |
| * Copyright (C) 2021 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de> |
| * Author: Pau Espin Pedrol <pespin@sysmocom.de> |
| * |
| * All Rights Reserved |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU Affero General Public License as published by |
| * the Free Software Foundation; either version 3 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU Affero General Public License |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| * |
| */ |
| |
| #include <osmocom/core/utils.h> |
| #include <osmocom/core/linuxlist.h> |
| #include <osmocom/ctrl/ports.h> |
| |
| #include "gprs_pcu.h" |
| #include "bts.h" |
| |
| struct gprs_pcu *the_pcu; |
| |
| static struct osmo_tdef T_defs_pcu[] = { |
| { .T=3113, .default_val=7, .unit=OSMO_TDEF_S, .desc="Timeout for paging", .val=0 }, |
| { .T=3190, .default_val=5, .unit=OSMO_TDEF_S, .desc="Return to packet idle mode after Packet DL Assignment on CCCH (s)", .val=0}, |
| { .T=3141, .default_val=10, .unit=OSMO_TDEF_S, .desc="Timeout for contention resolution procedure (s)", .val=0 }, |
| { .T=PCU_TDEF_NEIGH_RESOLVE_TO, .default_val=1000, .unit=OSMO_TDEF_MS, .desc="[ARFCN+BSIC]->[RAC+CI] resolution timeout (ms)", .val=0 }, |
| { .T=PCU_TDEF_SI_RESOLVE_TO, .default_val=1000, .unit=OSMO_TDEF_MS, .desc="RIM RAN-INFO response timeout (ms)", .val=0 }, |
| { .T=PCU_TDEF_NEIGH_CACHE_ALIVE, .default_val=5, .unit=OSMO_TDEF_S, .desc="[ARFCN+BSIC]->[RAC+CI] resolution cache entry storage timeout (s)", .val=0 }, |
| { .T=PCU_TDEF_SI_CACHE_ALIVE, .default_val=5, .unit=OSMO_TDEF_S, .desc="[RAC+CI]->[SI] resolution cache entry storage timeout (s)", .val=0 }, |
| { .T=-101, .default_val=30, .unit=OSMO_TDEF_S, .desc="BSSGP (un)blocking procedures timer (s)", .val=0 }, |
| { .T=-102, .default_val=30, .unit=OSMO_TDEF_S, .desc="BSSGP reset procedure timer (s)", .val=0 }, |
| { .T=-2000, .default_val=2, .unit=OSMO_TDEF_MS, .desc="Delay release of UL TBF after tx Packet Access Reject (PACCH) (ms)", .val=0 }, |
| { .T=-2001, .default_val=2, .unit=OSMO_TDEF_S, .desc="PACCH assignment timeout (s)", .val=0 }, |
| { .T=-2002, .default_val=200, .unit=OSMO_TDEF_MS, .desc="Waiting after IMM.ASS confirm timer (ms)", .val=0 }, |
| { .T=-2030, .default_val=60, .unit=OSMO_TDEF_S, .desc="Time to keep an idle MS object alive (s)", .val=0 }, /* slightly above T3314 (default 44s, 24.008, 11.2.2) */ |
| { .T=-2031, .default_val=2000, .unit=OSMO_TDEF_MS, .desc="Time to keep an idle DL TBF alive (ms)", .val=0 }, |
| { .T=0, .default_val=0, .unit=OSMO_TDEF_S, .desc=NULL, .val=0 } /* empty item at the end */ |
| }; |
| |
| static int gprs_pcu_talloc_destructor(struct gprs_pcu *pcu) |
| { |
| neigh_cache_free(pcu->neigh_cache); |
| si_cache_free(pcu->si_cache); |
| return 0; |
| } |
| |
| struct gprs_pcu *gprs_pcu_alloc(void *ctx) |
| { |
| struct gprs_pcu *pcu; |
| |
| pcu = (struct gprs_pcu *)talloc_zero(ctx, struct gprs_pcu); |
| OSMO_ASSERT(pcu); |
| talloc_set_destructor(pcu, gprs_pcu_talloc_destructor); |
| |
| pcu->vty.fc_interval = 1; |
| pcu->vty.max_cs_ul = MAX_GPRS_CS; |
| pcu->vty.max_cs_dl = MAX_GPRS_CS; |
| pcu->vty.max_mcs_ul = MAX_EDGE_MCS; |
| pcu->vty.max_mcs_dl = MAX_EDGE_MCS; |
| pcu->vty.force_alpha = (uint8_t)-1; /* don't force by default, use BTS SI13 provided value */ |
| pcu->vty.dl_tbf_preemptive_retransmission = true; |
| /* By default resegmentation is supported in DL can also be configured |
| * through VTY */ |
| pcu->vty.dl_arq_type = EGPRS_ARQ1; |
| pcu->vty.cs_adj_enabled = true; |
| pcu->vty.cs_adj_upper_limit = 33; /* Decrease CS if the error rate is above */ |
| pcu->vty.cs_adj_lower_limit = 10; /* Increase CS if the error rate is below */ |
| pcu->vty.cs_downgrade_threshold = 200; |
| /* CS-1 to CS-4 */ |
| pcu->vty.cs_lqual_ranges[0].low = -256; |
| pcu->vty.cs_lqual_ranges[0].high = 6; |
| pcu->vty.cs_lqual_ranges[1].low = 5; |
| pcu->vty.cs_lqual_ranges[1].high = 8; |
| pcu->vty.cs_lqual_ranges[2].low = 7; |
| pcu->vty.cs_lqual_ranges[2].high = 13; |
| pcu->vty.cs_lqual_ranges[3].low = 12; |
| pcu->vty.cs_lqual_ranges[3].high = 256; |
| /* MCS-1 to MCS-9 */ |
| /* Default thresholds are referenced from literature */ |
| /* Fig. 2.3, Chapter 2, Optimizing Wireless Communication Systems, Springer (2009) */ |
| pcu->vty.mcs_lqual_ranges[0].low = -256; |
| pcu->vty.mcs_lqual_ranges[0].high = 6; |
| pcu->vty.mcs_lqual_ranges[1].low = 5; |
| pcu->vty.mcs_lqual_ranges[1].high = 8; |
| pcu->vty.mcs_lqual_ranges[2].low = 7; |
| pcu->vty.mcs_lqual_ranges[2].high = 13; |
| pcu->vty.mcs_lqual_ranges[3].low = 12; |
| pcu->vty.mcs_lqual_ranges[3].high = 15; |
| pcu->vty.mcs_lqual_ranges[4].low = 14; |
| pcu->vty.mcs_lqual_ranges[4].high = 17; |
| pcu->vty.mcs_lqual_ranges[5].low = 16; |
| pcu->vty.mcs_lqual_ranges[5].high = 18; |
| pcu->vty.mcs_lqual_ranges[6].low = 17; |
| pcu->vty.mcs_lqual_ranges[6].high = 20; |
| pcu->vty.mcs_lqual_ranges[7].low = 19; |
| pcu->vty.mcs_lqual_ranges[7].high = 24; |
| pcu->vty.mcs_lqual_ranges[8].low = 23; |
| pcu->vty.mcs_lqual_ranges[8].high = 256; |
| pcu->vty.ns_dialect = GPRS_NS2_DIALECT_IPACCESS; |
| pcu->vty.ns_ip_dscp = -1; |
| pcu->vty.ns_priority = -1; |
| /* TODO: increase them when CRBB decoding is implemented */ |
| pcu->vty.ws_base = 64; |
| pcu->vty.ws_pdch = 0; |
| pcu->vty.llc_codel_interval_msec = LLC_CODEL_USE_DEFAULT; |
| pcu->vty.llc_idle_ack_csec = 10; |
| pcu->vty.neigh_ctrl_addr = NULL; /* don't use CTRL iface for Neigh Addr Resolution */ |
| pcu->vty.neigh_ctrl_port = OSMO_CTRL_PORT_BSC_NEIGH; |
| |
| pcu->T_defs = T_defs_pcu; |
| osmo_tdefs_reset(pcu->T_defs); |
| |
| INIT_LLIST_HEAD(&pcu->bts_list); |
| |
| pcu->neigh_cache = neigh_cache_alloc(pcu, osmo_tdef_get(pcu->T_defs, PCU_TDEF_NEIGH_CACHE_ALIVE, OSMO_TDEF_S, -1)); |
| pcu->si_cache = si_cache_alloc(pcu, osmo_tdef_get(pcu->T_defs, PCU_TDEF_SI_CACHE_ALIVE, OSMO_TDEF_S, -1)); |
| |
| return pcu; |
| } |
| |
| struct gprs_rlcmac_bts *gprs_pcu_get_bts_by_nr(struct gprs_pcu *pcu, uint8_t bts_nr) |
| { |
| struct gprs_rlcmac_bts *pos; |
| llist_for_each_entry(pos, &pcu->bts_list, list) { |
| if (pos->nr == bts_nr) |
| return pos; |
| } |
| return NULL; |
| } |
| |
| struct gprs_rlcmac_bts *gprs_pcu_get_bts_by_cgi_ps(struct gprs_pcu *pcu, struct osmo_cell_global_id_ps *cgi_ps) |
| { |
| struct gprs_rlcmac_bts *pos; |
| llist_for_each_entry(pos, &pcu->bts_list, list) { |
| if (osmo_cgi_ps_cmp(&pos->cgi_ps, cgi_ps) == 0) |
| return pos; |
| } |
| return NULL; |
| } |
| |
| void gprs_pcu_set_initial_cs(struct gprs_pcu *pcu, uint8_t cs_dl, uint8_t cs_ul) |
| { |
| struct gprs_rlcmac_bts *bts; |
| |
| the_pcu->vty.initial_cs_dl = cs_dl; |
| the_pcu->vty.initial_cs_ul = cs_ul; |
| |
| llist_for_each_entry(bts, &pcu->bts_list, list) { |
| bts_recalc_initial_cs(bts); |
| } |
| } |
| void gprs_pcu_set_initial_mcs(struct gprs_pcu *pcu, uint8_t mcs_dl, uint8_t mcs_ul) |
| { |
| struct gprs_rlcmac_bts *bts; |
| |
| the_pcu->vty.initial_mcs_dl = mcs_dl; |
| the_pcu->vty.initial_mcs_ul = mcs_ul; |
| |
| llist_for_each_entry(bts, &pcu->bts_list, list) { |
| bts_recalc_initial_mcs(bts); |
| } |
| } |
| |
| void gprs_pcu_set_max_cs(struct gprs_pcu *pcu, uint8_t cs_dl, uint8_t cs_ul) |
| { |
| struct gprs_rlcmac_bts *bts; |
| |
| the_pcu->vty.max_cs_dl = cs_dl; |
| the_pcu->vty.max_cs_ul = cs_ul; |
| |
| llist_for_each_entry(bts, &pcu->bts_list, list) { |
| bts_recalc_max_cs(bts); |
| } |
| } |
| void gprs_pcu_set_max_mcs(struct gprs_pcu *pcu, uint8_t mcs_dl, uint8_t mcs_ul) |
| { |
| struct gprs_rlcmac_bts *bts; |
| |
| the_pcu->vty.max_mcs_dl = mcs_dl; |
| the_pcu->vty.max_mcs_ul = mcs_ul; |
| |
| llist_for_each_entry(bts, &pcu->bts_list, list) { |
| bts_recalc_max_mcs(bts); |
| } |
| } |