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c592e697ce
When the cell becomes visible we will be bombed with location updating requests and to reduce the load on the network we should assign as many channels for it as possible. During load peek it is even more important than to have a spare voice channel and in general the LU procedure is pretty fast.
90 lines
3.0 KiB
C
90 lines
3.0 KiB
C
/* Management functions to allocate/release struct gsm_lchan */
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/* (C) 2008 by Harald Welte <laforge@gnumonks.org>
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* (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
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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 General Public License as published by
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* the Free Software Foundation; either version 2 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 General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#ifndef _CHAN_ALLOC_H
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#define _CHAN_ALLOC_H
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#include "gsm_subscriber.h"
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/*
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* Refcounting for the lchan. If the refcount drops to zero
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* the channel will send a RSL release request.
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*/
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#define use_subscr_con(con) \
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do { (con)->use_count++; \
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DEBUGP(DREF, "lchan (bts=%d,trx=%d,ts=%d,ch=%d) increases usage to: %d\n", \
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(con)->lchan->ts->trx->bts->nr, (con)->lchan->ts->trx->nr, (con)->lchan->ts->nr, \
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(con)->lchan->nr, (con)->use_count); \
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} while(0);
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#define put_subscr_con(con, reason) \
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do { (con)->use_count--; \
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DEBUGP(DREF, "lchan (bts=%d,trx=%d,ts=%d,ch=%d) decreases usage to: %d\n", \
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(con)->lchan->ts->trx->bts->nr, (con)->lchan->ts->trx->nr, (con)->lchan->ts->nr, \
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(con)->lchan->nr, (con)->use_count); \
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if ((con)->use_count <= 0) \
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_lchan_release((con)->lchan, reason); \
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} while(0);
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/* Special allocator for C0 of BTS */
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struct gsm_bts_trx_ts *ts_c0_alloc(struct gsm_bts *bts,
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enum gsm_phys_chan_config pchan);
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/* Regular physical channel allocator */
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struct gsm_bts_trx_ts *ts_alloc(struct gsm_bts *bts,
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enum gsm_phys_chan_config pchan);
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/* Regular physical channel (TS) */
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void ts_free(struct gsm_bts_trx_ts *ts);
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/* Find an allocated channel */
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struct gsm_lchan *lchan_find(struct gsm_bts *bts, struct gsm_subscriber *subscr);
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/* Find an allocated channel for a specified subscriber */
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struct gsm_lchan *lchan_for_subscr(struct gsm_subscriber *subscr);
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/* Allocate a logical channel (SDCCH, TCH, ...) */
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struct gsm_lchan *lchan_alloc(struct gsm_bts *bts, enum gsm_chan_t type, int allow_bigger);
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/* Free a logical channel (SDCCH, TCH, ...) */
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void lchan_free(struct gsm_lchan *lchan);
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void lchan_reset(struct gsm_lchan *lchan);
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/* internal.. do not use */
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int _lchan_release(struct gsm_lchan *lchan, u_int8_t release_reason);
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struct load_counter {
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unsigned int total;
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unsigned int used;
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};
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struct pchan_load {
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struct load_counter pchan[GSM_PCHAN_UNKNOWN];
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};
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void bts_chan_load(struct pchan_load *cl, const struct gsm_bts *bts);
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void network_chan_load(struct pchan_load *pl, struct gsm_network *net);
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int trx_is_usable(struct gsm_bts_trx *trx);
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#endif /* _CHAN_ALLOC_H */
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