diff options
Diffstat (limited to 'src/libbsc/e1_config.c')
-rw-r--r-- | src/libbsc/e1_config.c | 297 |
1 files changed, 297 insertions, 0 deletions
diff --git a/src/libbsc/e1_config.c b/src/libbsc/e1_config.c new file mode 100644 index 000000000..d57dec57e --- /dev/null +++ b/src/libbsc/e1_config.c @@ -0,0 +1,297 @@ +/* OpenBSC E1 Input code */ + +/* (C) 2008-2010 by Harald Welte <laforge@gnumonks.org> + * 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 Affero 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 <string.h> +#include <errno.h> + +#include <netinet/in.h> + +#include <openbsc/gsm_data.h> +#include <osmocom/abis/e1_input.h> +#include <osmocom/abis/trau_frame.h> +#include <openbsc/trau_mux.h> +#include <openbsc/misdn.h> +#include <osmocom/abis/ipaccess.h> +#include <osmocom/core/talloc.h> +#include <openbsc/debug.h> +#include <openbsc/abis_rsl.h> + +#define SAPI_L2ML 0 +#define SAPI_OML 62 +#define SAPI_RSL 0 /* 63 ? */ + +/* The e1_reconfig_*() functions below take the configuration present in the + * bts/trx/ts data structures and ensure the E1 configuration reflects the + * timeslot/subslot/TEI configuration */ + +int e1_reconfig_ts(struct gsm_bts_trx_ts *ts) +{ + struct gsm_e1_subslot *e1_link = &ts->e1_link; + struct e1inp_line *line; + struct e1inp_ts *e1_ts; + + DEBUGP(DLMI, "e1_reconfig_ts(%u,%u,%u)\n", ts->trx->bts->nr, ts->trx->nr, ts->nr); + + if (!e1_link->e1_ts) { + LOGP(DLINP, LOGL_ERROR, "TS (%u/%u/%u) without E1 timeslot?\n", + ts->nr, ts->trx->nr, ts->trx->bts->nr); + return 0; + } + + line = e1inp_line_find(e1_link->e1_nr); + if (!line) { + LOGP(DLINP, LOGL_ERROR, "TS (%u/%u/%u) referring to " + "non-existing E1 line %u\n", ts->nr, ts->trx->nr, + ts->trx->bts->nr, e1_link->e1_nr); + return -ENOMEM; + } + + if (ts_is_tch(ts)) { + e1_ts = &line->ts[e1_link->e1_ts-1]; + e1inp_ts_config_trau(e1_ts, line, subch_cb); + subch_demux_activate(&e1_ts->trau.demux, e1_link->e1_ts_ss); + } + + return 0; +} + +int e1_reconfig_trx(struct gsm_bts_trx *trx) +{ + struct gsm_e1_subslot *e1_link = &trx->rsl_e1_link; + struct e1inp_ts *sign_ts; + struct e1inp_line *line; + struct e1inp_sign_link *rsl_link; + int i; + + if (!e1_link->e1_ts) { + LOGP(DLINP, LOGL_ERROR, "TRX (%u/%u) RSL link without " + "timeslot?\n", trx->bts->nr, trx->nr); + return -EINVAL; + } + + /* RSL Link */ + line = e1inp_line_find(e1_link->e1_nr); + if (!line) { + LOGP(DLINP, LOGL_ERROR, "TRX (%u/%u) RSL link referring " + "to non-existing E1 line %u\n", trx->bts->nr, + trx->nr, e1_link->e1_nr); + return -ENOMEM; + } + sign_ts = &line->ts[e1_link->e1_ts-1]; + e1inp_ts_config_sign(sign_ts, line); + /* Ericsson RBS have a per-TRX OML link in parallel to RSL */ + if (trx->bts->type == GSM_BTS_TYPE_RBS2000) { + struct e1inp_sign_link *oml_link; + oml_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_OML, trx, + trx->rsl_tei, SAPI_OML); + if (!oml_link) { + LOGP(DLINP, LOGL_ERROR, "TRX (%u/%u) OML link creation " + "failed\n", trx->bts->nr, trx->nr); + return -ENOMEM; + } + if (trx->oml_link) + e1inp_sign_link_destroy(trx->oml_link); + trx->oml_link = oml_link; + } + rsl_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_RSL, + trx, trx->rsl_tei, SAPI_RSL); + if (!rsl_link) { + LOGP(DLINP, LOGL_ERROR, "TRX (%u/%u) RSL link creation " + "failed\n", trx->bts->nr, trx->nr); + return -ENOMEM; + } + if (trx->rsl_link) + e1inp_sign_link_destroy(trx->rsl_link); + trx->rsl_link = rsl_link; + + for (i = 0; i < TRX_NR_TS; i++) + e1_reconfig_ts(&trx->ts[i]); + + return 0; +} + +/* this is the generic callback for all ISDN-based BTS. */ +static int bts_isdn_sign_link(struct msgb *msg) +{ + int ret = -EINVAL; + struct e1inp_sign_link *link = msg->dst; + struct gsm_bts *bts; + + switch (link->type) { + case E1INP_SIGN_OML: + bts = link->trx->bts; + ret = bts->model->oml_rcvmsg(msg); + break; + case E1INP_SIGN_RSL: + ret = abis_rsl_rcvmsg(msg); + break; + default: + LOGP(DLMI, LOGL_ERROR, "unknown link type %u\n", link->type); + break; + } + return ret; +} + +struct e1inp_line_ops bts_isdn_e1inp_line_ops = { + .sign_link = bts_isdn_sign_link, +}; + +int e1_reconfig_bts(struct gsm_bts *bts) +{ + struct gsm_e1_subslot *e1_link = &bts->oml_e1_link; + struct e1inp_ts *sign_ts; + struct e1inp_line *line; + struct e1inp_sign_link *oml_link; + struct gsm_bts_trx *trx; + + DEBUGP(DLMI, "e1_reconfig_bts(%u)\n", bts->nr); + + line = e1inp_line_find(e1_link->e1_nr); + if (!line) { + LOGP(DLINP, LOGL_ERROR, "BTS %u OML link referring to " + "non-existing E1 line %u\n", bts->nr, e1_link->e1_nr); + return -ENOMEM; + } + + if (!bts->model->e1line_bind_ops) { + LOGP(DLINP, LOGL_ERROR, "no callback to bind E1 line operations\n"); + return -EINVAL; + } + if (!line->ops) + bts->model->e1line_bind_ops(line); + + /* skip signal link initialization, this is done later for these BTS. */ + if (bts->type == GSM_BTS_TYPE_NANOBTS || + bts->type == GSM_BTS_TYPE_OSMOBTS) + return e1inp_line_update(line); + + /* OML link */ + if (!e1_link->e1_ts) { + LOGP(DLINP, LOGL_ERROR, "BTS %u OML link without timeslot?\n", + bts->nr); + return -EINVAL; + } + + sign_ts = &line->ts[e1_link->e1_ts-1]; + e1inp_ts_config_sign(sign_ts, line); + oml_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_OML, + bts->c0, bts->oml_tei, SAPI_OML); + if (!oml_link) { + LOGP(DLINP, LOGL_ERROR, "BTS %u OML link creation failed\n", + bts->nr); + return -ENOMEM; + } + if (bts->oml_link) + e1inp_sign_link_destroy(bts->oml_link); + bts->oml_link = oml_link; + + llist_for_each_entry(trx, &bts->trx_list, list) + e1_reconfig_trx(trx); + + /* notify E1 input something has changed */ + return e1inp_line_update(line); +} + +#if 0 +/* do some compiled-in configuration for our BTS/E1 setup */ +int e1_config(struct gsm_bts *bts, int cardnr, int release_l2) +{ + struct e1inp_line *line; + struct e1inp_ts *sign_ts; + struct e1inp_sign_link *oml_link, *rsl_link; + struct gsm_bts_trx *trx = bts->c0; + int base_ts; + + switch (bts->nr) { + case 0: + /* First BTS uses E1 TS 01,02,03,04,05 */ + base_ts = HARDCODED_BTS0_TS - 1; + break; + case 1: + /* Second BTS uses E1 TS 06,07,08,09,10 */ + base_ts = HARDCODED_BTS1_TS - 1; + break; + case 2: + /* Third BTS uses E1 TS 11,12,13,14,15 */ + base_ts = HARDCODED_BTS2_TS - 1; + default: + return -EINVAL; + } + + line = talloc_zero(tall_bsc_ctx, struct e1inp_line); + if (!line) + return -ENOMEM; + + /* create E1 timeslots for signalling and TRAU frames */ + e1inp_ts_config(&line->ts[base_ts+1-1], line, E1INP_TS_TYPE_SIGN); + e1inp_ts_config(&line->ts[base_ts+2-1], line, E1INP_TS_TYPE_TRAU); + e1inp_ts_config(&line->ts[base_ts+3-1], line, E1INP_TS_TYPE_TRAU); + + /* create signalling links for TS1 */ + sign_ts = &line->ts[base_ts+1-1]; + oml_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_OML, + trx, TEI_OML, SAPI_OML); + rsl_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_RSL, + trx, TEI_RSL, SAPI_RSL); + + /* create back-links from bts/trx */ + bts->oml_link = oml_link; + trx->rsl_link = rsl_link; + + /* enable subchannel demuxer on TS2 */ + subch_demux_activate(&line->ts[base_ts+2-1].trau.demux, 1); + subch_demux_activate(&line->ts[base_ts+2-1].trau.demux, 2); + subch_demux_activate(&line->ts[base_ts+2-1].trau.demux, 3); + + /* enable subchannel demuxer on TS3 */ + subch_demux_activate(&line->ts[base_ts+3-1].trau.demux, 0); + subch_demux_activate(&line->ts[base_ts+3-1].trau.demux, 1); + subch_demux_activate(&line->ts[base_ts+3-1].trau.demux, 2); + subch_demux_activate(&line->ts[base_ts+3-1].trau.demux, 3); + + trx = gsm_bts_trx_num(bts, 1); + if (trx) { + /* create E1 timeslots for TRAU frames of TRX1 */ + e1inp_ts_config(&line->ts[base_ts+4-1], line, E1INP_TS_TYPE_TRAU); + e1inp_ts_config(&line->ts[base_ts+5-1], line, E1INP_TS_TYPE_TRAU); + + /* create RSL signalling link for TRX1 */ + sign_ts = &line->ts[base_ts+1-1]; + rsl_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_RSL, + trx, TEI_RSL+1, SAPI_RSL); + /* create back-links from trx */ + trx->rsl_link = rsl_link; + + /* enable subchannel demuxer on TS2 */ + subch_demux_activate(&line->ts[base_ts+4-1].trau.demux, 0); + subch_demux_activate(&line->ts[base_ts+4-1].trau.demux, 1); + subch_demux_activate(&line->ts[base_ts+4-1].trau.demux, 2); + subch_demux_activate(&line->ts[base_ts+4-1].trau.demux, 3); + + /* enable subchannel demuxer on TS3 */ + subch_demux_activate(&line->ts[base_ts+5-1].trau.demux, 0); + subch_demux_activate(&line->ts[base_ts+5-1].trau.demux, 1); + subch_demux_activate(&line->ts[base_ts+5-1].trau.demux, 2); + subch_demux_activate(&line->ts[base_ts+5-1].trau.demux, 3); + } + + return mi_setup(cardnr, line, release_l2); +} +#endif |