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/* NM BTS FSM */
/* (C) 2020 by sysmocom - s.m.f.c. GmbH <info@sysmocom.de>
* Author: Pau Espin Pedrol <pespin@sysmocom.de>
*
* 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 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 <errno.h>
#include <unistd.h>
#include <inttypes.h>
#include <osmocom/core/fsm.h>
#include <osmocom/core/tdef.h>
#include <osmocom/gsm/protocol/gsm_12_21.h>
#include <osmo-bts/logging.h>
#include <osmo-bts/gsm_data.h>
#include <osmo-bts/bts_model.h>
#include <osmo-bts/bts.h>
#include <osmo-bts/rsl.h>
#include <osmo-bts/nm_common_fsm.h>
#include <osmo-bts/phy_link.h>
#define X(s) (1 << (s))
#define nm_bts_fsm_state_chg(fi, NEXT_STATE) \
osmo_fsm_inst_state_chg(fi, NEXT_STATE, 0, 0)
static void ev_dispatch_children(struct gsm_bts *bts, uint32_t event)
{
struct gsm_bts_trx *trx;
llist_for_each_entry(trx, &bts->trx_list, list) {
osmo_fsm_inst_dispatch(trx->mo.fi, event, NULL);
osmo_fsm_inst_dispatch(trx->bb_transc.mo.fi, event, NULL);
}
}
//////////////////////////
// FSM STATE ACTIONS
//////////////////////////
static void st_op_disabled_notinstalled_on_enter(struct osmo_fsm_inst *fi, uint32_t prev_state)
{
struct gsm_bts *bts = (struct gsm_bts *)fi->priv;
/* Reset state: */
bts->si_valid = 0;
bts->mo.setattr_success = false;
bts->mo.opstart_success = false;
oml_mo_state_chg(&bts->mo, NM_OPSTATE_DISABLED, NM_AVSTATE_NOT_INSTALLED, NM_STATE_LOCKED);
}
static void st_op_disabled_notinstalled(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
struct gsm_bts *bts = (struct gsm_bts *)fi->priv;
struct gsm_bts_trx *trx;
switch (event) {
case NM_EV_SW_ACT:
oml_mo_tx_sw_act_rep(&bts->mo);
llist_for_each_entry(trx, &bts->trx_list, list) {
if (trx->bts->variant == BTS_OSMO_OMLDUMMY) /* In OMLDUMMY, phy=NULL */
continue;
/* During startup, phy_links are already opened, but if we are
* re-connecting, phy_link was closed when disconnected from
* previous BSC, so let's re-open it.
*/
struct phy_instance *pinst = trx_phy_instance(trx);
struct phy_link *plink = pinst->phy_link;
if (phy_link_state_get(plink) == PHY_LINK_SHUTDOWN)
bts_model_phy_link_open(plink);
}
nm_bts_fsm_state_chg(fi, NM_BTS_ST_OP_DISABLED_OFFLINE);
return;
default:
OSMO_ASSERT(0);
}
}
static void st_op_disabled_offline_on_enter(struct osmo_fsm_inst *fi, uint32_t prev_state)
{
struct gsm_bts *bts = (struct gsm_bts *)fi->priv;
bts->mo.setattr_success = false;
bts->mo.opstart_success = false;
oml_mo_state_chg(&bts->mo, NM_OPSTATE_DISABLED, NM_AVSTATE_OFF_LINE, -1);
}
static void st_op_disabled_offline(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
struct gsm_bts *bts = (struct gsm_bts *)fi->priv;
struct nm_fsm_ev_setattr_data *setattr_data;
switch (event) {
case NM_EV_SETATTR_ACK:
case NM_EV_SETATTR_NACK:
setattr_data = (struct nm_fsm_ev_setattr_data *)data;
bts->mo.setattr_success = setattr_data->cause == 0;
oml_fom_ack_nack(setattr_data->msg, setattr_data->cause);
break;
case NM_EV_OPSTART_ACK:
bts->mo.opstart_success = true;
oml_mo_opstart_ack(&bts->mo);
nm_bts_fsm_state_chg(fi, NM_BTS_ST_OP_ENABLED);
break; /* check statechg below */
case NM_EV_OPSTART_NACK:
bts->mo.opstart_success = false;
oml_mo_opstart_nack(&bts->mo, (int)(intptr_t)data);
return;
default:
OSMO_ASSERT(0);
}
}
static void st_op_enabled_on_enter(struct osmo_fsm_inst *fi, uint32_t prev_state)
{
struct gsm_bts *bts = (struct gsm_bts *)fi->priv;
oml_mo_state_chg(&bts->mo, NM_OPSTATE_ENABLED, NM_AVSTATE_OK, -1);
}
static void st_op_enabled(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
}
static void nm_bts_allstate(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
struct gsm_bts *bts = (struct gsm_bts *)fi->priv;
switch (event) {
case NM_EV_SHUTDOWN_START:
/* Announce we start shutting down */
oml_mo_state_chg(&bts->mo, -1, -1, NM_STATE_SHUTDOWN);
/* Propagate event to children: */
ev_dispatch_children(bts, event);
break;
case NM_EV_SHUTDOWN_FINISH:
/* Propagate event to children: */
ev_dispatch_children(bts, event);
nm_bts_fsm_state_chg(fi, NM_BTS_ST_OP_DISABLED_NOTINSTALLED);
break;
default:
OSMO_ASSERT(false);
}
}
static struct osmo_fsm_state nm_bts_fsm_states[] = {
[NM_BTS_ST_OP_DISABLED_NOTINSTALLED] = {
.in_event_mask =
X(NM_EV_SW_ACT),
.out_state_mask =
X(NM_BTS_ST_OP_DISABLED_NOTINSTALLED) |
X(NM_BTS_ST_OP_DISABLED_OFFLINE),
.name = "DISABLED_NOTINSTALLED",
.onenter = st_op_disabled_notinstalled_on_enter,
.action = st_op_disabled_notinstalled,
},
[NM_BTS_ST_OP_DISABLED_OFFLINE] = {
.in_event_mask =
X(NM_EV_SETATTR_ACK) |
X(NM_EV_SETATTR_NACK) |
X(NM_EV_OPSTART_ACK) |
X(NM_EV_OPSTART_NACK),
.out_state_mask =
X(NM_BTS_ST_OP_DISABLED_NOTINSTALLED) |
X(NM_BTS_ST_OP_ENABLED),
.name = "DISABLED_OFFLINE",
.onenter = st_op_disabled_offline_on_enter,
.action = st_op_disabled_offline,
},
[NM_BTS_ST_OP_ENABLED] = {
.in_event_mask = 0,
.out_state_mask =
X(NM_BTS_ST_OP_DISABLED_NOTINSTALLED),
.name = "ENABLED",
.onenter = st_op_enabled_on_enter,
.action = st_op_enabled,
},
};
struct osmo_fsm nm_bts_fsm = {
.name = "NM_BTS_OP",
.states = nm_bts_fsm_states,
.num_states = ARRAY_SIZE(nm_bts_fsm_states),
.event_names = nm_fsm_event_names,
.allstate_action = nm_bts_allstate,
.allstate_event_mask = X(NM_EV_SHUTDOWN_START) |
X(NM_EV_SHUTDOWN_FINISH),
.log_subsys = DOML,
};
static __attribute__((constructor)) void nm_bts_fsm_init(void)
{
OSMO_ASSERT(osmo_fsm_register(&nm_bts_fsm) == 0);
}
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