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/* NM Radio Carrier 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>
#define X(s) (1 << (s))
#define nm_chan_fsm_state_chg(fi, NEXT_STATE) \
osmo_fsm_inst_state_chg(fi, NEXT_STATE, 0, 0)
//////////////////////////
// FSM STATE ACTIONS
//////////////////////////
static void st_op_disabled_notinstalled_on_enter(struct osmo_fsm_inst *fi, uint32_t prev_state)
{
struct gsm_bts_trx_ts *ts = (struct gsm_bts_trx_ts *)fi->priv;
ts->mo.opstart_success = false;
oml_mo_state_chg(&ts->mo, NM_OPSTATE_DISABLED, NM_AVSTATE_NOT_INSTALLED);
}
static void st_op_disabled_notinstalled(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
struct gsm_bts_trx_ts *ts = (struct gsm_bts_trx_ts *)fi->priv;
switch (event) {
case NM_EV_BBTRANSC_INSTALLED:
oml_mo_tx_sw_act_rep(&ts->mo);
if (ts->trx->bb_transc.mo.nm_state.operational == NM_OPSTATE_ENABLED)
nm_chan_fsm_state_chg(fi, NM_CHAN_ST_OP_DISABLED_OFFLINE);
else
nm_chan_fsm_state_chg(fi, NM_CHAN_ST_OP_DISABLED_DEPENDENCY);
return;
default:
OSMO_ASSERT(0);
}
}
static void st_op_disabled_dependency_on_enter(struct osmo_fsm_inst *fi, uint32_t prev_state)
{
struct gsm_bts_trx_ts *ts = (struct gsm_bts_trx_ts *)fi->priv;
ts->mo.opstart_success = false;
oml_mo_state_chg(&ts->mo, NM_OPSTATE_DISABLED, NM_AVSTATE_DEPENDENCY);
}
static void st_op_disabled_dependency(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
struct gsm_bts_trx_ts *ts = (struct gsm_bts_trx_ts *)fi->priv;
switch (event) {
case NM_EV_OPSTART_ACK:
LOGPFSML(fi, LOGL_NOTICE, "BSC trying to activate TS while still in avail=dependency. "
"Allowing it to stay backward-compatible with older osmo-bts versions, but BSC is wrong.\n");
ts->mo.opstart_success = true;
oml_mo_opstart_ack(&ts->mo);
nm_chan_fsm_state_chg(fi, NM_CHAN_ST_OP_ENABLED);
return;
case NM_EV_OPSTART_NACK:
ts->mo.opstart_success = false;
oml_mo_opstart_nack(&ts->mo, (int)(intptr_t)data);
return;
case NM_EV_BBTRANSC_ENABLED:
oml_mo_state_chg(&ts->mo, NM_OPSTATE_DISABLED, NM_AVSTATE_OFF_LINE);
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_trx_ts *ts = (struct gsm_bts_trx_ts *)fi->priv;
ts->mo.opstart_success = false;
oml_mo_state_chg(&ts->mo, NM_OPSTATE_DISABLED, NM_AVSTATE_OFF_LINE);
}
static void st_op_disabled_offline(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
struct gsm_bts_trx_ts *ts = (struct gsm_bts_trx_ts *)fi->priv;
switch (event) {
case NM_EV_OPSTART_ACK:
ts->mo.opstart_success = true;
oml_mo_opstart_ack(&ts->mo);
nm_chan_fsm_state_chg(fi, NM_CHAN_ST_OP_ENABLED);
return;
case NM_EV_OPSTART_NACK:
ts->mo.opstart_success = false;
oml_mo_opstart_nack(&ts->mo, (int)(intptr_t)data);
return;
case NM_EV_BBTRANSC_DISABLED:
oml_mo_state_chg(&ts->mo, NM_OPSTATE_DISABLED, NM_AVSTATE_DEPENDENCY);
return;
default:
OSMO_ASSERT(0);
}
}
static void st_op_enabled_on_enter(struct osmo_fsm_inst *fi, uint32_t prev_state)
{
struct gsm_bts_trx_ts *ts = (struct gsm_bts_trx_ts *)fi->priv;
oml_mo_state_chg(&ts->mo, NM_OPSTATE_ENABLED, NM_AVSTATE_OK);
}
static void st_op_enabled(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
switch (event) {
case NM_EV_BBTRANSC_DISABLED:
nm_chan_fsm_state_chg(fi, NM_CHAN_ST_OP_DISABLED_DEPENDENCY);
return;
case NM_EV_DISABLE:
nm_chan_fsm_state_chg(fi, NM_CHAN_ST_OP_DISABLED_OFFLINE);
return;
default:
OSMO_ASSERT(0);
}
}
static struct osmo_fsm_state nm_chan_fsm_states[] = {
[NM_CHAN_ST_OP_DISABLED_NOTINSTALLED] = {
.in_event_mask =
X(NM_EV_BBTRANSC_INSTALLED),
.out_state_mask =
X(NM_CHAN_ST_OP_DISABLED_OFFLINE) |
X(NM_CHAN_ST_OP_DISABLED_DEPENDENCY),
.name = "DISABLED_NOTINSTALLED",
.onenter = st_op_disabled_notinstalled_on_enter,
.action = st_op_disabled_notinstalled,
},
[NM_CHAN_ST_OP_DISABLED_DEPENDENCY] = {
.in_event_mask =
X(NM_EV_OPSTART_ACK) | /* backward compatibility, buggy BSC */
X(NM_EV_OPSTART_NACK) |
X(NM_EV_BBTRANSC_ENABLED),
.out_state_mask =
X(NM_CHAN_ST_OP_DISABLED_OFFLINE) |
X(NM_CHAN_ST_OP_ENABLED), /* backward compatibility, buggy BSC */
.name = "DISABLED_DEPENDENCY",
.onenter = st_op_disabled_dependency_on_enter,
.action = st_op_disabled_dependency,
},
[NM_CHAN_ST_OP_DISABLED_OFFLINE] = {
.in_event_mask =
X(NM_EV_OPSTART_ACK) |
X(NM_EV_OPSTART_NACK) |
X(NM_EV_BBTRANSC_DISABLED),
.out_state_mask =
X(NM_CHAN_ST_OP_ENABLED) |
X(NM_CHAN_ST_OP_DISABLED_DEPENDENCY),
.name = "DISABLED_OFFLINE",
.onenter = st_op_disabled_offline_on_enter,
.action = st_op_disabled_offline,
},
[NM_CHAN_ST_OP_ENABLED] = {
.in_event_mask =
X(NM_EV_BBTRANSC_DISABLED) |
X(NM_EV_DISABLE),
.out_state_mask =
X(NM_CHAN_ST_OP_DISABLED_OFFLINE) |
X(NM_CHAN_ST_OP_DISABLED_DEPENDENCY),
.name = "ENABLED",
.onenter = st_op_enabled_on_enter,
.action = st_op_enabled,
},
};
struct osmo_fsm nm_chan_fsm = {
.name = "NM_CHAN_OP",
.states = nm_chan_fsm_states,
.num_states = ARRAY_SIZE(nm_chan_fsm_states),
.event_names = nm_fsm_event_names,
.log_subsys = DOML,
};
static __attribute__((constructor)) void nm_chan_fsm_init(void)
{
OSMO_ASSERT(osmo_fsm_register(&nm_chan_fsm) == 0);
}
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