666 lines
16 KiB
C
666 lines
16 KiB
C
/*
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* layer 1 primitive handling and interface
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*
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* Copyright (C) 2013 Andreas Eversberg <jolly@eversberg.eu>
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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 Affero 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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#include <stdint.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <osmocom/core/talloc.h>
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#include <osmocom/core/bits.h>
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#include <osmo-bts/logging.h>
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#include <osmo-bts/bts.h>
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#include <osmo-bts/oml.h>
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#include <osmo-bts/rsl.h>
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#include <osmo-bts/l1sap.h>
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#include <osmo-bts/bts_model.h>
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#include <osmo-bts/amr.h>
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#include "l1_if.h"
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#include "trx_if.h"
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#include "scheduler.h"
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static const uint8_t transceiver_chan_types[_GSM_PCHAN_MAX] = {
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[GSM_PCHAN_NONE] = 8,
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[GSM_PCHAN_CCCH] = 4,
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[GSM_PCHAN_CCCH_SDCCH4] = 5,
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[GSM_PCHAN_TCH_F] = 1,
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[GSM_PCHAN_TCH_H] = 2,
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[GSM_PCHAN_SDCCH8_SACCH8C] = 7,
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[GSM_PCHAN_PDCH] = 13,
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//[GSM_PCHAN_TCH_F_PDCH] = FIXME,
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[GSM_PCHAN_UNKNOWN] = 0,
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};
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/*
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* create destroy trx l1 instance
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*/
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struct trx_l1h *l1if_open(struct gsm_bts_trx *trx)
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{
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struct trx_l1h *l1h;
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int rc;
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l1h = talloc_zero(tall_bts_ctx, struct trx_l1h);
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if (!l1h)
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return NULL;
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l1h->trx = trx;
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trx->role_bts.l1h = l1h;
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trx_sched_init(l1h);
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rc = trx_if_open(l1h);
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if (rc < 0) {
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LOGP(DL1C, LOGL_FATAL, "Cannot initialize scheduler\n");
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goto err;
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}
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return l1h;
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err:
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l1if_close(l1h);
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trx->role_bts.l1h = NULL;
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return NULL;
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}
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void l1if_close(struct trx_l1h *l1h)
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{
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trx_if_close(l1h);
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trx_sched_exit(l1h);
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talloc_free(l1h);
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}
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void l1if_reset(struct trx_l1h *l1h)
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{
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}
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static void check_transceiver_availability_trx(struct trx_l1h *l1h, int avail)
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{
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struct gsm_bts_trx *trx = l1h->trx;
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uint8_t tn;
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/* HACK, we should change state when we receive first clock from
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* transceiver */
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if (avail) {
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/* signal availability */
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oml_mo_state_chg(&trx->mo, NM_OPSTATE_DISABLED, NM_AVSTATE_OK);
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oml_mo_tx_sw_act_rep(&trx->mo);
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oml_mo_state_chg(&trx->bb_transc.mo, -1, NM_AVSTATE_OK);
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oml_mo_tx_sw_act_rep(&trx->bb_transc.mo);
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for (tn = 0; tn < 8; tn++)
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oml_mo_state_chg(&trx->ts[tn].mo, NM_OPSTATE_DISABLED,
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(l1h->config.slotmask & (1 << tn)) ?
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NM_AVSTATE_DEPENDENCY :
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NM_AVSTATE_NOT_INSTALLED);
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} else {
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oml_mo_state_chg(&trx->mo, NM_OPSTATE_DISABLED,
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NM_AVSTATE_OFF_LINE);
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oml_mo_state_chg(&trx->bb_transc.mo, NM_OPSTATE_DISABLED,
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NM_AVSTATE_OFF_LINE);
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for (tn = 0; tn < 8; tn++)
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oml_mo_state_chg(&trx->ts[tn].mo, NM_OPSTATE_DISABLED,
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NM_AVSTATE_OFF_LINE);
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}
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}
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int check_transceiver_availability(struct gsm_bts *bts, int avail)
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{
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struct gsm_bts_trx *trx;
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struct trx_l1h *l1h;
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llist_for_each_entry(trx, &bts->trx_list, list) {
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l1h = trx_l1h_hdl(trx);
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check_transceiver_availability_trx(l1h, avail);
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}
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return 0;
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}
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/*
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* transceiver provisioning
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*/
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int l1if_provision_transceiver_trx(struct trx_l1h *l1h)
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{
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uint8_t tn;
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if (!transceiver_available)
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return -EIO;
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if (l1h->config.poweron
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&& l1h->config.tsc_valid
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&& l1h->config.bsic_valid
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&& l1h->config.arfcn_valid) {
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/* before power on */
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if (l1h->config.arfcn_valid && !l1h->config.arfcn_sent) {
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trx_if_cmd_rxtune(l1h, l1h->config.arfcn);
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trx_if_cmd_txtune(l1h, l1h->config.arfcn);
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l1h->config.arfcn_sent = 1;
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}
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if (l1h->config.tsc_valid && !l1h->config.tsc_sent) {
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trx_if_cmd_settsc(l1h, l1h->config.tsc);
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l1h->config.tsc_sent = 1;
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}
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if (l1h->config.bsic_valid && !l1h->config.bsic_sent) {
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trx_if_cmd_setbsic(l1h, l1h->config.bsic);
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l1h->config.bsic_sent = 1;
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}
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if (!l1h->config.poweron_sent) {
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trx_if_cmd_poweron(l1h);
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l1h->config.poweron_sent = 1;
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}
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/* after power on */
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if (l1h->config.rxgain_valid && !l1h->config.rxgain_sent) {
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trx_if_cmd_setrxgain(l1h, l1h->config.rxgain);
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l1h->config.rxgain_sent = 1;
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}
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if (l1h->config.power_valid && !l1h->config.power_sent) {
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trx_if_cmd_setpower(l1h, l1h->config.power);
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l1h->config.power_sent = 1;
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}
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if (l1h->config.maxdly_valid && !l1h->config.maxdly_sent) {
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trx_if_cmd_setmaxdly(l1h, l1h->config.maxdly);
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l1h->config.maxdly_sent = 1;
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}
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for (tn = 0; tn < 8; tn++) {
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if (l1h->config.slottype_valid[tn]
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&& !l1h->config.slottype_sent[tn]) {
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trx_if_cmd_setslot(l1h, tn,
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l1h->config.slottype[tn]);
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l1h->config.slottype_sent[tn] = 1;
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}
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}
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return 0;
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}
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if (!l1h->config.poweron && !l1h->config.poweron_sent) {
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trx_if_cmd_poweroff(l1h);
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l1h->config.poweron_sent = 1;
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l1h->config.rxgain_sent = 0;
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l1h->config.power_sent = 0;
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l1h->config.maxdly_sent = 0;
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for (tn = 0; tn < 8; tn++)
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l1h->config.slottype_sent[tn] = 0;
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}
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return 0;
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}
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int l1if_provision_transceiver(struct gsm_bts *bts)
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{
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struct gsm_bts_trx *trx;
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struct trx_l1h *l1h;
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uint8_t tn;
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llist_for_each_entry(trx, &bts->trx_list, list) {
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l1h = trx_l1h_hdl(trx);
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l1h->config.arfcn_sent = 0;
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l1h->config.tsc_sent = 0;
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l1h->config.bsic_sent = 0;
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l1h->config.poweron_sent = 0;
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l1h->config.rxgain_sent = 0;
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l1h->config.power_sent = 0;
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l1h->config.maxdly_sent = 0;
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for (tn = 0; tn < 8; tn++)
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l1h->config.slottype_sent[tn] = 0;
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l1if_provision_transceiver_trx(l1h);
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}
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return 0;
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}
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/*
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* activation/configuration/deactivation of transceiver's TRX
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*/
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/* initialize the layer1 */
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static int trx_init(struct gsm_bts_trx *trx)
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{
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struct trx_l1h *l1h = trx_l1h_hdl(trx);
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/* power on transceiver, if not already */
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if (!l1h->config.poweron) {
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l1h->config.poweron = 1;
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l1h->config.poweron_sent = 0;
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l1if_provision_transceiver_trx(l1h);
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}
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if (trx == trx->bts->c0)
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lchan_init_lapdm(&trx->ts[0].lchan[4]);
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/* Set to Operational State: Enabled */
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oml_mo_state_chg(&trx->mo, NM_OPSTATE_ENABLED, NM_AVSTATE_OK);
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/* Send OPSTART ack */
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return oml_mo_opstart_ack(&trx->mo);
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}
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/* deactivate transceiver */
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int bts_model_trx_close(struct gsm_bts_trx *trx)
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{
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struct trx_l1h *l1h = trx_l1h_hdl(trx);
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/* close all logical channels and reset timeslots */
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trx_sched_reset(l1h);
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/* power off transceiver, if not already */
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if (l1h->config.poweron) {
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l1h->config.poweron = 0;
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l1h->config.poweron_sent = 0;
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l1if_provision_transceiver_trx(l1h);
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}
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/* Set to Operational State: Disabled */
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check_transceiver_availability_trx(l1h, 0);
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return 0;
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}
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/* set bts attributes */
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static uint8_t trx_set_bts(struct gsm_bts *bts, struct tlv_parsed *new_attr)
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{
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struct gsm_bts_trx *trx;
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struct trx_l1h *l1h;
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uint8_t bsic = bts->bsic;
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struct gsm_bts_role_bts *btsb = bts_role_bts(bts);
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if (TLVP_PRESENT(new_attr, NM_ATT_CONN_FAIL_CRIT)) {
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const uint8_t *val = TLVP_VAL(new_attr, NM_ATT_CONN_FAIL_CRIT);
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btsb->radio_link_timeout = val[1];
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}
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llist_for_each_entry(trx, &bts->trx_list, list) {
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l1h = trx_l1h_hdl(trx);
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if (l1h->config.bsic != bsic || !l1h->config.bsic_valid) {
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l1h->config.bsic = bsic;
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l1h->config.bsic_valid = 1;
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l1h->config.bsic_sent = 0;
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l1if_provision_transceiver_trx(l1h);
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}
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}
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check_transceiver_availability(bts, transceiver_available);
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return 0;
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}
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/* set trx attributes */
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static uint8_t trx_set_trx(struct gsm_bts_trx *trx)
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{
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struct trx_l1h *l1h = trx_l1h_hdl(trx);
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uint16_t arfcn = trx->arfcn;
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if (l1h->config.arfcn != arfcn || !l1h->config.arfcn_valid) {
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l1h->config.arfcn = arfcn;
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l1h->config.arfcn_valid = 1;
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l1h->config.arfcn_sent = 0;
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l1if_provision_transceiver_trx(l1h);
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}
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return 0;
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}
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/* set ts attributes */
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static uint8_t trx_set_ts(struct gsm_bts_trx_ts *ts)
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{
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struct trx_l1h *l1h = trx_l1h_hdl(ts->trx);
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uint8_t tn = ts->nr;
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uint16_t tsc = ts->tsc;
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enum gsm_phys_chan_config pchan = ts->pchan;
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uint8_t slottype;
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int rc;
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/* all TSC of all timeslots must be equal, because transceiver only
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* supports one TSC per TRX */
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if (l1h->config.tsc != tsc || !l1h->config.tsc_valid) {
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l1h->config.tsc = tsc;
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l1h->config.tsc_valid = 1;
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l1h->config.tsc_sent = 0;
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l1if_provision_transceiver_trx(l1h);
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}
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/* set physical channel */
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rc = trx_sched_set_pchan(l1h, tn, pchan);
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if (rc)
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return NM_NACK_RES_NOTAVAIL;
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slottype = transceiver_chan_types[pchan];
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if (l1h->config.slottype[tn] != slottype
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|| !l1h->config.slottype_valid[tn]) {
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l1h->config.slottype[tn] = slottype;
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l1h->config.slottype_valid[tn] = 1;
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l1h->config.slottype_sent[tn] = 0;
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l1if_provision_transceiver_trx(l1h);
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}
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return 0;
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}
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/*
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* primitive handling
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*/
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/* enable ciphering */
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static int l1if_set_ciphering(struct trx_l1h *l1h, struct gsm_lchan *lchan,
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uint8_t chan_nr, int downlink)
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{
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/* ciphering already enabled in both directions */
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if (lchan->ciph_state == LCHAN_CIPH_RXTX_CONF)
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return -EINVAL;
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if (!downlink) {
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/* set uplink */
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trx_sched_set_cipher(l1h, chan_nr, 0, lchan->encr.alg_id - 1,
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lchan->encr.key, lchan->encr.key_len);
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lchan->ciph_state = LCHAN_CIPH_RX_CONF;
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} else {
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/* set downlink and also set uplink, if not already */
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if (lchan->ciph_state != LCHAN_CIPH_RX_CONF) {
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trx_sched_set_cipher(l1h, chan_nr, 0,
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lchan->encr.alg_id - 1, lchan->encr.key,
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lchan->encr.key_len);
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}
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trx_sched_set_cipher(l1h, chan_nr, 1, lchan->encr.alg_id - 1,
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lchan->encr.key, lchan->encr.key_len);
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lchan->ciph_state = LCHAN_CIPH_RXTX_CONF;
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}
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return 0;
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}
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static int mph_info_chan_confirm(struct trx_l1h *l1h, uint8_t chan_nr,
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enum osmo_mph_info_type type, uint8_t cause)
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{
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struct osmo_phsap_prim l1sap;
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memset(&l1sap, 0, sizeof(l1sap));
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osmo_prim_init(&l1sap.oph, SAP_GSM_PH, PRIM_MPH_INFO, PRIM_OP_CONFIRM,
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NULL);
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l1sap.u.info.type = type;
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l1sap.u.info.u.act_cnf.chan_nr = chan_nr;
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l1sap.u.info.u.act_cnf.cause = cause;
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return l1sap_up(l1h->trx, &l1sap);
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}
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int l1if_mph_time_ind(struct gsm_bts *bts, uint32_t fn)
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{
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struct osmo_phsap_prim l1sap;
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memset(&l1sap, 0, sizeof(l1sap));
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osmo_prim_init(&l1sap.oph, SAP_GSM_PH, PRIM_MPH_INFO,
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PRIM_OP_INDICATION, NULL);
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l1sap.u.info.type = PRIM_INFO_TIME;
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l1sap.u.info.u.time_ind.fn = fn;
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if (!bts->c0)
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return -EINVAL;
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return l1sap_up(bts->c0, &l1sap);
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}
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int l1if_process_meas_res(struct gsm_bts_trx *trx, uint8_t chan_nr, float qta,
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float ber, float rssi)
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{
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struct osmo_phsap_prim l1sap;
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memset(&l1sap, 0, sizeof(l1sap));
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osmo_prim_init(&l1sap.oph, SAP_GSM_PH, PRIM_MPH_INFO,
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PRIM_OP_INDICATION, NULL);
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l1sap.u.info.type = PRIM_INFO_MEAS;
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l1sap.u.info.u.meas_ind.chan_nr = chan_nr;
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l1sap.u.info.u.meas_ind.ta_offs_qbits = qta;
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l1sap.u.info.u.meas_ind.ber10k = (unsigned int) (ber * 100);
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l1sap.u.info.u.meas_ind.inv_rssi = (uint8_t) (rssi * -1);
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return l1sap_up(trx, &l1sap);
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}
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/* primitive from common part */
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int bts_model_l1sap_down(struct gsm_bts_trx *trx, struct osmo_phsap_prim *l1sap)
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{
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struct trx_l1h *l1h = trx_l1h_hdl(trx);
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struct msgb *msg = l1sap->oph.msg;
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uint8_t chan_nr;
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uint8_t tn, ss;
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int rc = 0;
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struct gsm_lchan *lchan;
|
|
|
|
switch (OSMO_PRIM_HDR(&l1sap->oph)) {
|
|
case OSMO_PRIM(PRIM_PH_DATA, PRIM_OP_REQUEST):
|
|
if (!msg)
|
|
break;
|
|
/* put data into scheduler's queue */
|
|
return trx_sched_ph_data_req(l1h, l1sap);
|
|
case OSMO_PRIM(PRIM_TCH, PRIM_OP_REQUEST):
|
|
if (!msg)
|
|
break;
|
|
/* put data into scheduler's queue */
|
|
return trx_sched_tch_req(l1h, l1sap);
|
|
case OSMO_PRIM(PRIM_MPH_INFO, PRIM_OP_REQUEST):
|
|
switch (l1sap->u.info.type) {
|
|
case PRIM_INFO_ACT_CIPH:
|
|
chan_nr = l1sap->u.info.u.ciph_req.chan_nr;
|
|
tn = L1SAP_CHAN2TS(chan_nr);
|
|
ss = l1sap_chan2ss(chan_nr);
|
|
lchan = &trx->ts[tn].lchan[ss];
|
|
if (l1sap->u.info.u.ciph_req.uplink)
|
|
l1if_set_ciphering(l1h, lchan, chan_nr, 0);
|
|
if (l1sap->u.info.u.ciph_req.downlink)
|
|
l1if_set_ciphering(l1h, lchan, chan_nr, 1);
|
|
break;
|
|
case PRIM_INFO_ACTIVATE:
|
|
case PRIM_INFO_DEACTIVATE:
|
|
case PRIM_INFO_MODIFY:
|
|
chan_nr = l1sap->u.info.u.act_req.chan_nr;
|
|
tn = L1SAP_CHAN2TS(chan_nr);
|
|
ss = l1sap_chan2ss(chan_nr);
|
|
lchan = &trx->ts[tn].lchan[ss];
|
|
if (l1sap->u.info.type == PRIM_INFO_ACTIVATE) {
|
|
if ((chan_nr & 0x80)) {
|
|
LOGP(DL1C, LOGL_ERROR, "Cannot activate"
|
|
" chan_nr 0x%02x\n", chan_nr);
|
|
break;
|
|
}
|
|
/* activate dedicated channel */
|
|
trx_sched_set_lchan(l1h, chan_nr, 0x00, 1);
|
|
/* activate assoicated channel */
|
|
trx_sched_set_lchan(l1h, chan_nr, 0x40, 1);
|
|
/* set mode */
|
|
trx_sched_set_mode(l1h, chan_nr,
|
|
lchan->rsl_cmode, lchan->tch_mode,
|
|
lchan->tch.amr_mr.num_modes,
|
|
lchan->tch.amr_mr.mode[0].mode,
|
|
lchan->tch.amr_mr.mode[1].mode,
|
|
lchan->tch.amr_mr.mode[2].mode,
|
|
lchan->tch.amr_mr.mode[3].mode,
|
|
amr_get_initial_mode(lchan),
|
|
(lchan->ho.active == 1));
|
|
/* init lapdm */
|
|
lchan_init_lapdm(lchan);
|
|
/* set lchan active */
|
|
lchan_set_state(lchan, LCHAN_S_ACTIVE);
|
|
/* set initial ciphering */
|
|
l1if_set_ciphering(l1h, lchan, chan_nr, 0);
|
|
l1if_set_ciphering(l1h, lchan, chan_nr, 1);
|
|
if (lchan->encr.alg_id)
|
|
lchan->ciph_state = LCHAN_CIPH_RXTX_CONF;
|
|
else
|
|
lchan->ciph_state = LCHAN_CIPH_NONE;
|
|
|
|
/* confirm */
|
|
mph_info_chan_confirm(l1h, chan_nr,
|
|
PRIM_INFO_ACTIVATE, 0);
|
|
break;
|
|
}
|
|
if (l1sap->u.info.type == PRIM_INFO_MODIFY) {
|
|
/* change mode */
|
|
trx_sched_set_mode(l1h, chan_nr,
|
|
lchan->rsl_cmode, lchan->tch_mode,
|
|
lchan->tch.amr_mr.num_modes,
|
|
lchan->tch.amr_mr.mode[0].mode,
|
|
lchan->tch.amr_mr.mode[1].mode,
|
|
lchan->tch.amr_mr.mode[2].mode,
|
|
lchan->tch.amr_mr.mode[3].mode,
|
|
amr_get_initial_mode(lchan),
|
|
0);
|
|
break;
|
|
}
|
|
if ((chan_nr & 0x80)) {
|
|
LOGP(DL1C, LOGL_ERROR, "Cannot deactivate "
|
|
"chan_nr 0x%02x\n", chan_nr);
|
|
break;
|
|
}
|
|
/* deactivate assoicated channel */
|
|
trx_sched_set_lchan(l1h, chan_nr, 0x40, 0);
|
|
/* set lchan inactive
|
|
* (also if only sacch, so no meaurement is done) */
|
|
lchan_set_state(lchan, LCHAN_S_NONE);
|
|
/* deactivate dedicated channel */
|
|
if (!l1sap->u.info.u.act_req.sacch_only) {
|
|
trx_sched_set_lchan(l1h, chan_nr, 0x00, 0);
|
|
/* confirm only on dedicated channel */
|
|
mph_info_chan_confirm(l1h, chan_nr,
|
|
PRIM_INFO_DEACTIVATE, 0);
|
|
lchan->ciph_state = 0; /* FIXME: do this in common/\*.c */
|
|
}
|
|
break;
|
|
default:
|
|
LOGP(DL1C, LOGL_NOTICE, "unknown MPH-INFO.req %d\n",
|
|
l1sap->u.info.type);
|
|
rc = -EINVAL;
|
|
goto done;
|
|
}
|
|
break;
|
|
default:
|
|
LOGP(DL1C, LOGL_NOTICE, "unknown prim %d op %d\n",
|
|
l1sap->oph.primitive, l1sap->oph.operation);
|
|
rc = -EINVAL;
|
|
goto done;
|
|
}
|
|
|
|
done:
|
|
if (msg)
|
|
msgb_free(msg);
|
|
return rc;
|
|
}
|
|
|
|
|
|
/*
|
|
* oml handling
|
|
*/
|
|
|
|
/* callback from OML */
|
|
int bts_model_check_oml(struct gsm_bts *bts, uint8_t msg_type,
|
|
struct tlv_parsed *old_attr, struct tlv_parsed *new_attr,
|
|
void *obj)
|
|
{
|
|
/* FIXME: check if the attributes are valid */
|
|
return 0;
|
|
}
|
|
|
|
/* callback from OML */
|
|
int bts_model_apply_oml(struct gsm_bts *bts, struct msgb *msg,
|
|
struct tlv_parsed *new_attr, int kind, void *obj)
|
|
{
|
|
struct abis_om_fom_hdr *foh = msgb_l3(msg);
|
|
int cause = 0;
|
|
|
|
switch (foh->msg_type) {
|
|
case NM_MT_SET_BTS_ATTR:
|
|
cause = trx_set_bts(obj, new_attr);
|
|
break;
|
|
case NM_MT_SET_RADIO_ATTR:
|
|
cause = trx_set_trx(obj);
|
|
break;
|
|
case NM_MT_SET_CHAN_ATTR:
|
|
cause = trx_set_ts(obj);
|
|
break;
|
|
}
|
|
|
|
return oml_fom_ack_nack(msg, cause);
|
|
}
|
|
|
|
/* callback from OML */
|
|
int bts_model_opstart(struct gsm_bts *bts, struct gsm_abis_mo *mo,
|
|
void *obj)
|
|
{
|
|
int rc;
|
|
|
|
switch (mo->obj_class) {
|
|
case NM_OC_RADIO_CARRIER:
|
|
/* activate transceiver */
|
|
rc = trx_init(obj);
|
|
break;
|
|
case NM_OC_CHANNEL:
|
|
/* configure timeslot */
|
|
rc = 0; //ts_connect(obj);
|
|
|
|
/* Set to Operational State: Enabled */
|
|
oml_mo_state_chg(mo, NM_OPSTATE_ENABLED, NM_AVSTATE_OK);
|
|
|
|
/* Send OPSTART ack */
|
|
rc = oml_mo_opstart_ack(mo);
|
|
|
|
break;
|
|
case NM_OC_BTS:
|
|
case NM_OC_SITE_MANAGER:
|
|
case NM_OC_BASEB_TRANSC:
|
|
case NM_OC_GPRS_NSE:
|
|
case NM_OC_GPRS_CELL:
|
|
case NM_OC_GPRS_NSVC:
|
|
oml_mo_state_chg(mo, NM_OPSTATE_ENABLED, -1);
|
|
rc = oml_mo_opstart_ack(mo);
|
|
break;
|
|
default:
|
|
rc = oml_mo_opstart_nack(mo, NM_NACK_OBJCLASS_NOTSUPP);
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
int bts_model_chg_adm_state(struct gsm_bts *bts, struct gsm_abis_mo *mo,
|
|
void *obj, uint8_t adm_state)
|
|
{
|
|
/* blindly accept all state changes */
|
|
mo->nm_state.administrative = adm_state;
|
|
return oml_mo_statechg_ack(mo);
|
|
}
|
|
|
|
int bts_model_trx_deact_rf(struct gsm_bts_trx *trx)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int bts_model_oml_estab(struct gsm_bts *bts)
|
|
{
|
|
return 0;
|
|
}
|
|
|