215 lines
8.1 KiB
C
215 lines
8.1 KiB
C
/*
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* Copyright (C) 2013 by Holger Hans Peter Freyther
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* Copyright (C) 2021 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
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* Author: Pau Espin Pedrol <pespin@sysmocom.de>
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*
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <osmocom/core/utils.h>
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#include <osmocom/core/linuxlist.h>
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#include <osmocom/ctrl/ports.h>
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#include "gprs_pcu.h"
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#include "bts.h"
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struct gprs_pcu *the_pcu;
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static struct osmo_tdef T_defs_pcu[] = {
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{ .T=3113, .default_val=7, .unit=OSMO_TDEF_S, .desc="Timeout for paging", .val=0 },
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{ .T=3190, .default_val=5, .unit=OSMO_TDEF_S, .desc="Return to packet idle mode after Packet DL Assignment on CCCH (s)", .val=0},
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{ .T=3141, .default_val=10, .unit=OSMO_TDEF_S, .desc="Timeout for contention resolution procedure (s)", .val=0 },
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{ .T=3172, .default_val=5000, .unit=OSMO_TDEF_MS, .desc="Wait Indication used in Imm Ass Reject during TBF Establishment (PACCH)", .val=0, .min_val = 0, .max_val = 255000 }, /* TS 44.060 7.1.3.2.1 */
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{ .T=PCU_TDEF_NEIGH_RESOLVE_TO, .default_val=1000, .unit=OSMO_TDEF_MS, .desc="[ARFCN+BSIC]->[RAC+CI] resolution timeout (ms)", .val=0 },
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{ .T=PCU_TDEF_SI_RESOLVE_TO, .default_val=1000, .unit=OSMO_TDEF_MS, .desc="RIM RAN-INFO response timeout (ms)", .val=0 },
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{ .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 },
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{ .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 },
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{ .T=-101, .default_val=30, .unit=OSMO_TDEF_S, .desc="BSSGP (un)blocking procedures timer (s)", .val=0 },
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{ .T=-102, .default_val=30, .unit=OSMO_TDEF_S, .desc="BSSGP reset procedure timer (s)", .val=0 },
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{ .T=-2000, .default_val=0, .unit=OSMO_TDEF_MS, .desc="Delay release of UL TBF after tx Packet Access Reject (PACCH) (ms)", .val=0 },
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{ .T=-2001, .default_val=2, .unit=OSMO_TDEF_S, .desc="DL TBF PACCH assignment timeout (s)", .val=0 },
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{ .T=-2002, .default_val=200, .unit=OSMO_TDEF_MS, .desc="Waiting after IMM.ASS confirm timer (ms)", .val=0 },
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{ .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) */
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{ .T=-2031, .default_val=2000, .unit=OSMO_TDEF_MS, .desc="Time to keep an idle DL TBF alive (ms)", .val=0 },
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{ .T=0, .default_val=0, .unit=OSMO_TDEF_S, .desc=NULL, .val=0 } /* empty item at the end */
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};
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static void _update_stats_timer_cb(void *data)
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{
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struct gprs_pcu *pcu = (struct gprs_pcu *)data;
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struct gprs_rlcmac_bts *bts;
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llist_for_each_entry(bts, &pcu->bts_list, list)
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osmo_time_cc_set_flag(&bts->all_allocated_pdch, bts_all_pdch_allocated(bts));
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osmo_timer_schedule(&pcu->update_stats_timer, 1, 0);
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}
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static int gprs_pcu_talloc_destructor(struct gprs_pcu *pcu)
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{
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struct gprs_rlcmac_bts *bts;
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while ((bts = llist_first_entry_or_null(&pcu->bts_list, struct gprs_rlcmac_bts, list)))
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talloc_free(bts);
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osmo_timer_del(&pcu->update_stats_timer);
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neigh_cache_free(pcu->neigh_cache);
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si_cache_free(pcu->si_cache);
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return 0;
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}
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struct gprs_pcu *gprs_pcu_alloc(void *ctx)
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{
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struct gprs_pcu *pcu;
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pcu = (struct gprs_pcu *)talloc_zero(ctx, struct gprs_pcu);
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OSMO_ASSERT(pcu);
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talloc_set_destructor(pcu, gprs_pcu_talloc_destructor);
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pcu->vty.fc_interval = 1;
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pcu->vty.max_cs_ul = MAX_GPRS_CS;
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pcu->vty.max_cs_dl = MAX_GPRS_CS;
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pcu->vty.max_mcs_ul = MAX_EDGE_MCS;
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pcu->vty.max_mcs_dl = MAX_EDGE_MCS;
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pcu->vty.force_alpha = (uint8_t)-1; /* don't force by default, use BTS SI13 provided value */
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pcu->vty.dl_tbf_preemptive_retransmission = true;
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/* By default resegmentation is supported in DL can also be configured
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* through VTY */
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pcu->vty.dl_arq_type = EGPRS_ARQ1;
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pcu->vty.cs_adj_enabled = true;
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pcu->vty.cs_adj_upper_limit = 33; /* Decrease CS if the error rate is above */
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pcu->vty.cs_adj_lower_limit = 10; /* Increase CS if the error rate is below */
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pcu->vty.cs_downgrade_threshold = 200;
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/* CS-1 to CS-4 */
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pcu->vty.cs_lqual_ranges[0].low = -256;
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pcu->vty.cs_lqual_ranges[0].high = 6;
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pcu->vty.cs_lqual_ranges[1].low = 5;
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pcu->vty.cs_lqual_ranges[1].high = 8;
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pcu->vty.cs_lqual_ranges[2].low = 7;
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pcu->vty.cs_lqual_ranges[2].high = 13;
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pcu->vty.cs_lqual_ranges[3].low = 12;
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pcu->vty.cs_lqual_ranges[3].high = 256;
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/* MCS-1 to MCS-9 */
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/* Default thresholds are referenced from literature */
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/* Fig. 2.3, Chapter 2, Optimizing Wireless Communication Systems, Springer (2009) */
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pcu->vty.mcs_lqual_ranges[0].low = -256;
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pcu->vty.mcs_lqual_ranges[0].high = 6;
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pcu->vty.mcs_lqual_ranges[1].low = 5;
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pcu->vty.mcs_lqual_ranges[1].high = 8;
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pcu->vty.mcs_lqual_ranges[2].low = 7;
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pcu->vty.mcs_lqual_ranges[2].high = 13;
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pcu->vty.mcs_lqual_ranges[3].low = 12;
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pcu->vty.mcs_lqual_ranges[3].high = 15;
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pcu->vty.mcs_lqual_ranges[4].low = 14;
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pcu->vty.mcs_lqual_ranges[4].high = 17;
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pcu->vty.mcs_lqual_ranges[5].low = 16;
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pcu->vty.mcs_lqual_ranges[5].high = 18;
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pcu->vty.mcs_lqual_ranges[6].low = 17;
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pcu->vty.mcs_lqual_ranges[6].high = 20;
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pcu->vty.mcs_lqual_ranges[7].low = 19;
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pcu->vty.mcs_lqual_ranges[7].high = 24;
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pcu->vty.mcs_lqual_ranges[8].low = 23;
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pcu->vty.mcs_lqual_ranges[8].high = 256;
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pcu->vty.ns_dialect = GPRS_NS2_DIALECT_IPACCESS;
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pcu->vty.ns_ip_dscp = -1;
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pcu->vty.ns_priority = -1;
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/* TODO: increase them when CRBB decoding is implemented */
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pcu->vty.ws_base = 64;
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pcu->vty.ws_pdch = 0;
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pcu->vty.llc_codel_interval_msec = LLC_CODEL_USE_DEFAULT;
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pcu->vty.llc_idle_ack_csec = 10;
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pcu->vty.msclass_default = PCU_DEFAULT_MSLOT_CLASS;
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pcu->T_defs = T_defs_pcu;
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osmo_tdefs_reset(pcu->T_defs);
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INIT_LLIST_HEAD(&pcu->bts_list);
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pcu->neigh_cache = neigh_cache_alloc(pcu, osmo_tdef_get(pcu->T_defs, PCU_TDEF_NEIGH_CACHE_ALIVE, OSMO_TDEF_S, -1));
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pcu->si_cache = si_cache_alloc(pcu, osmo_tdef_get(pcu->T_defs, PCU_TDEF_SI_CACHE_ALIVE, OSMO_TDEF_S, -1));
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osmo_timer_setup(&pcu->update_stats_timer, _update_stats_timer_cb, pcu);
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osmo_timer_schedule(&pcu->update_stats_timer, 1, 0);
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return pcu;
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}
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struct gprs_rlcmac_bts *gprs_pcu_get_bts_by_nr(struct gprs_pcu *pcu, uint8_t bts_nr)
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{
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struct gprs_rlcmac_bts *pos;
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llist_for_each_entry(pos, &pcu->bts_list, list) {
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if (pos->nr == bts_nr)
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return pos;
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}
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return NULL;
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}
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struct gprs_rlcmac_bts *gprs_pcu_get_bts_by_cgi_ps(struct gprs_pcu *pcu, struct osmo_cell_global_id_ps *cgi_ps)
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{
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struct gprs_rlcmac_bts *pos;
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llist_for_each_entry(pos, &pcu->bts_list, list) {
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if (osmo_cgi_ps_cmp(&pos->cgi_ps, cgi_ps) == 0)
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return pos;
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}
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return NULL;
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}
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void gprs_pcu_set_initial_cs(struct gprs_pcu *pcu, uint8_t cs_dl, uint8_t cs_ul)
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{
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struct gprs_rlcmac_bts *bts;
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the_pcu->vty.initial_cs_dl = cs_dl;
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the_pcu->vty.initial_cs_ul = cs_ul;
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llist_for_each_entry(bts, &pcu->bts_list, list) {
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bts_recalc_initial_cs(bts);
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}
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}
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void gprs_pcu_set_initial_mcs(struct gprs_pcu *pcu, uint8_t mcs_dl, uint8_t mcs_ul)
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{
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struct gprs_rlcmac_bts *bts;
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the_pcu->vty.initial_mcs_dl = mcs_dl;
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the_pcu->vty.initial_mcs_ul = mcs_ul;
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llist_for_each_entry(bts, &pcu->bts_list, list) {
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bts_recalc_initial_mcs(bts);
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}
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}
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void gprs_pcu_set_max_cs(struct gprs_pcu *pcu, uint8_t cs_dl, uint8_t cs_ul)
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{
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struct gprs_rlcmac_bts *bts;
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the_pcu->vty.max_cs_dl = cs_dl;
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the_pcu->vty.max_cs_ul = cs_ul;
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llist_for_each_entry(bts, &pcu->bts_list, list) {
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bts_recalc_max_cs(bts);
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}
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}
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void gprs_pcu_set_max_mcs(struct gprs_pcu *pcu, uint8_t mcs_dl, uint8_t mcs_ul)
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{
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struct gprs_rlcmac_bts *bts;
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the_pcu->vty.max_mcs_dl = mcs_dl;
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the_pcu->vty.max_mcs_ul = mcs_ul;
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llist_for_each_entry(bts, &pcu->bts_list, list) {
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bts_recalc_max_mcs(bts);
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}
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}
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