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osmo-bts
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osmo-bts/src/common/bts.c

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/* (C) 2011 by Andreas Eversberg <jolly@eversberg.eu>
*
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <osmocore/select.h>
#include <osmocore/timer.h>
#include <osmocore/msgb.h>
#include <osmocore/talloc.h>
#include <osmocore/protocol/gsm_12_21.h>
#include <osmo-bts/logging.h>
//#include <osmocom/bb/common/osmocom_data.h>
//#include <osmocom/bb/common/l1l2_interface.h>
#include <osmo-bts/abis.h>
#include <osmo-bts/rtp.h>
#include <osmo-bts/bts.h>
#include <osmo-bts/rsl.h>
#include <osmo-bts/oml.h>
extern void *l23_ctx;
extern uint8_t cr_loc2rem_cmd;
extern uint8_t cr_loc2rem_resp;
extern uint8_t cr_rem2loc_cmd;
extern uint8_t cr_rem2loc_resp;
BTS_SI_NAME;
#if 0
struct osmobts_lchan *lchan_by_channelnr(struct osmobts_trx *trx,
uint8_t channelnr)
{
uint8_t ts = channelnr & ~RSL_CHAN_NR_MASK;
uint8_t type = channelnr & RSL_CHAN_NR_MASK;
uint8_t sub = 0;
struct osmobts_slot *slot = trx->slot[ts];
if ((type & 0xf0) == RSL_CHAN_Lm_ACCHs) {
sub = (channelnr >> 3) & 1;
type = RSL_CHAN_Lm_ACCHs;
} else
if ((type & 0xe0) == RSL_CHAN_SDCCH4_ACCH) {
sub = (channelnr >> 3) & 3;
type = RSL_CHAN_SDCCH4_ACCH;
} else
if ((type & 0xc0) == RSL_CHAN_SDCCH8_ACCH) {
sub = (channelnr >> 3) & 7;
type = RSL_CHAN_SDCCH8_ACCH;
} else
if (type == RSL_CHAN_BCCH
|| type == RSL_CHAN_RACH
|| type == RSL_CHAN_PCH_AGCH) {
if (!slot->has_bcch) {
LOGP(DSUM, LOGL_NOTICE, "Slot %d has no BCCH\n", ts);
return NULL;
}
return slot->lchan[0];
} else {
LOGP(DSUM, LOGL_NOTICE, "Unknown channel type 0x%02x\n", type);
return NULL;
}
if (slot->acch_type == type)
return slot->lchan[sub];
}
LOGP(DSUM, LOGL_NOTICE, "No slot found with channel type 0x%02x\n", type);
return NULL;
}
#endif
struct osmocom_bts *create_bts(uint8_t num_trx, char *id)
{
struct osmocom_bts *bts;
struct osmobts_trx *trx;
int i, j;
LOGP(DSUM, LOGL_INFO, "Creating BTS\n");
bts = talloc_zero(l23_ctx, struct osmocom_bts);
if (!bts)
return NULL;
bts->link.bts = bts;
bts->id = id;
for (i = 0; i < num_trx; i++) {
LOGP(DSUM, LOGL_INFO, "Creating TRX %d\n", i);
trx = talloc_zero(l23_ctx, struct osmobts_trx);
if (!trx)
return NULL;
trx->bts = bts;
trx->trx_nr = i;
INIT_LLIST_HEAD(&trx->ms_list);
for (j = 0; j < 8; j++) {
trx->slot[j].trx = trx;
trx->slot[j].slot_nr = j;
trx->slot[j].chan_comb = 0xff; /* not set */
}
trx->link.trx = trx;
bts->trx[i] = trx;
}
bts->num_trx = num_trx;
return bts;
}
int create_ms(struct osmobts_trx *trx, int maskc, uint8_t *maskv_tx,
uint8_t *maskv_rx)
{
struct osmobts_ms *tx_ms, *rx_ms;
int i, j;
int rc;
static char sock_path[] = "/tmp/osmocom_l2.1";
for (i = 0; i < maskc; i++) {
/* create MS */
tx_ms = talloc_zero(l23_ctx, struct osmobts_ms);
printf("%p\n", tx_ms);
if (!tx_ms)
return -ENOMEM;
tx_ms->trx = trx;
rc = layer2_open(&tx_ms->ms, sock_path);
strcpy(tx_ms->ms.name, strchr(sock_path, '.') + 1);
sock_path[strlen(sock_path) - 1]++;
if (rc < 0) {
talloc_free(tx_ms);
return rc;
}
llist_add_tail(&tx_ms->entry, &trx->ms_list);
rx_ms = talloc_zero(l23_ctx, struct osmobts_ms);
rx_ms->trx = trx;
if (!rx_ms)
return -ENOMEM;
rc = layer2_open(&rx_ms->ms, sock_path);
strcpy(rx_ms->ms.name, strchr(sock_path, '.') + 1);
sock_path[strlen(sock_path) - 1]++;
if (rc < 0) {
talloc_free(rx_ms);
return rc;
}
llist_add_tail(&rx_ms->entry, &trx->ms_list);
/* assign to SLOT */
for (j = 0; j < 8; j++) {
if ((maskv_tx[i] & (1 << j)))
trx->slot[j].tx_ms = tx_ms;
if ((maskv_rx[i] & (1 << j)))
trx->slot[j].rx_ms = rx_ms;
}
}
return i;
}
void destroy_lchan(struct osmobts_lchan *lchan)
{
LOGP(DSUM, LOGL_INFO, "Destroying logical channel. (trx=%d ts=%d ss=%d)\n", lchan->slot->trx->trx_nr, lchan->slot->slot_nr, lchan->lchan_nr);
lapdm_exit(&lchan->l2_entity.lapdm_acch);
lapdm_exit(&lchan->l2_entity.lapdm_acch);
if (lchan->rtp.socket_created)
rtp_close_socket(&lchan->rtp);
talloc_free(lchan);
}
/* create and destroy lchan */
void bts_setup_slot(struct osmobts_slot *slot, uint8_t comb)
{
int i, ii;
struct osmobts_lchan *lchan;
uint8_t cbits;
if (slot->chan_comb == comb)
return;
/* destroy old */
for (i = 0; i < 8; i++) {
if (slot->lchan[i])
destroy_lchan(slot->lchan[i]);
slot->lchan[i] = NULL;
}
switch(comb) {
case 0xff:
return;
case NM_CHANC_TCHFull:
cbits = 0x01;
ii = 1;
break;
case NM_CHANC_TCHHalf:
cbits = 0x02;
ii = 2;
break;
case NM_CHANC_BCCHComb:
cbits = 0x04;
ii = 4;
break;
case NM_CHANC_SDCCH:
cbits = 0x08;
ii = 8;
break;
default:
cbits = 0x10;
ii = 0;
}
if (!slot->tx_ms) {
LOGP(DSUM, LOGL_ERROR, "Slot is not available\n");
return;
}
for (i = 0; i < ii; i++) {
LOGP(DSUM, LOGL_INFO, "Creating logical channel. (trx=%d ts=%d ss=%d)\n", slot->trx->trx_nr, slot->slot_nr, i);
lchan = talloc_zero(l23_ctx, struct osmobts_lchan);
lchan->slot = slot;
lchan->lchan_nr = i;
lchan->chan_nr = ((cbits | i) << 3) | slot->slot_nr;
lapdm_init(&lchan->l2_entity.lapdm_dcch, &lchan->l2_entity, &slot->tx_ms->ms);
lapdm_init(&lchan->l2_entity.lapdm_acch, &lchan->l2_entity, &slot->tx_ms->ms);
lapdm_set_bts();
osmol2_register_handler(&lchan->l2_entity, &rsl_tx_rll);
slot->lchan[i] = lchan;
}
}
static void destroy_ms(struct osmobts_ms *ms)
{
layer2_close(&ms->ms);
llist_del(&ms->entry);
talloc_free(ms);
}
void destroy_bts(struct osmocom_bts *bts)
{
int i;
struct osmobts_ms *ms;
for (i = 0; i < bts->num_trx; i++) {
abis_close(&bts->trx[i]->link);
while(!llist_empty(&bts->trx[i]->ms_list)) {
ms = llist_entry(bts->trx[i]->ms_list.next,
struct osmobts_ms, entry);
destroy_ms(ms);
}
if (bsc_timer_pending(&bts->trx[i]->si.timer))
bsc_del_timer(&bts->trx[i]->si.timer);
talloc_free(bts->trx[i]);
bts->trx[i] = NULL;
}
abis_close(&bts->link);
talloc_free(bts);
}
/* main link is established, send status report */
int bts_link_estab(struct osmocom_bts *bts)
{
int i, j;
uint8_t radio_state;
LOGP(DSUM, LOGL_INFO, "Main link established, sending Status'.\n");
/* site-manager status */
oml_tx_state_changed(&bts->link, NM_OPSTATE_ENABLED, NM_AVSTATE_OK,
NM_OC_SITE_MANAGER, 0xff, 0xff, 0xff);
/* bts status */
oml_tx_state_changed(&bts->link, NM_OPSTATE_ENABLED, NM_AVSTATE_OK,
NM_OC_BTS, 0, 0xff, 0xff);
/* trx */
for (i = 0; i < bts->num_trx; i++) {
radio_state = (bts->trx[i]->link.state == LINK_STATE_CONNECT) ? NM_OPSTATE_ENABLED : NM_OPSTATE_DISABLED;
oml_tx_state_changed(&bts->link, radio_state,
NM_AVSTATE_OK, NM_OC_RADIO_CARRIER, 0,
bts->trx[i]->trx_nr, 0xff);
oml_tx_sw_act_rep(&bts->link, NM_OC_RADIO_CARRIER, 0, bts->trx[i]->trx_nr, 0xff);
oml_tx_state_changed(&bts->link, NM_OPSTATE_ENABLED,
NM_AVSTATE_OK, NM_OC_BASEB_TRANSC, 0,
bts->trx[i]->trx_nr, 0xff);
oml_tx_sw_act_rep(&bts->link, NM_OC_BASEB_TRANSC, 0, bts->trx[i]->trx_nr, 0xff);
/* channel */
for (j = 0; j < 8; j++) {
if (bts->trx[i]->slot[j].tx_ms)
oml_tx_state_changed(&bts->link,
NM_OPSTATE_DISABLED, NM_AVSTATE_DEPENDENCY,
NM_OC_CHANNEL, 0, bts->trx[i]->trx_nr,
bts->trx[i]->slot[j].slot_nr);
else
oml_tx_state_changed(&bts->link,
NM_OPSTATE_DISABLED,
NM_AVSTATE_NOT_INSTALLED,
NM_OC_CHANNEL, 0, bts->trx[i]->trx_nr,
bts->trx[i]->slot[j].slot_nr);
}
}
return 0;
}
/* RSL link is established, send status report */
int trx_link_estab(struct osmobts_trx *trx)
{
uint8_t radio_state = (trx->link.state == LINK_STATE_CONNECT) ? NM_OPSTATE_ENABLED : NM_OPSTATE_DISABLED;
LOGP(DSUM, LOGL_INFO, "RSL link (TRX %02x) state changed to %s, sending Status'.\n", trx->trx_nr, (trx->link.state == LINK_STATE_CONNECT) ? "up" : "down");
oml_tx_state_changed(&trx->bts->link, radio_state, NM_AVSTATE_OK, NM_OC_RADIO_CARRIER, 0, trx->trx_nr, 0xff);
if (trx->link.state == LINK_STATE_CONNECT)
rsl_tx_rf_res(trx);
return 0;
}
void bts_new_si(void *arg)
{
struct osmobts_trx *trx = arg;
int i;
if (bsc_timer_pending(&trx->si.timer))
return;
i = 0;
while(i < BTS_SI_NUM) {
if ((trx->si.flags[i] & BTS_SI_NEW))
break;
i++;
}
if (i == BTS_SI_NUM)
return;
if ((trx->si.flags[i] & BTS_SI_USE))
LOGP(DSUM, LOGL_INFO, "Setting SYSTEM INFORMATION %s.\n", bts_si_name[i]);
else
LOGP(DSUM, LOGL_INFO, "Removing SYSTEM INFORMATION %s.\n", bts_si_name[i]);
trx->si.flags[i] &= ~BTS_SI_NEW;
/* distribute */
printf("TODO: send SI update to L1\n");
/* delay until next SI */
trx->si.timer.cb = bts_new_si;
trx->si.timer.data = trx;
bsc_schedule_timer(&trx->si.timer, 0, 200000);
}
/* handle bts instance (including MS instances) */
int work_bts(struct osmocom_bts *bts)
{
int work = 0, w;
do {
w = 0;
// w |= xxx_dequeue(ms);
if (w)
work = 1;
} while (w);
return work;
}
#if 0
int create_chan(struct osmocom_bts *slot, uint8_t type)
{
welcher type?:
}
#endif
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