433 lines
13 KiB
C
433 lines
13 KiB
C
/* NM GPRS Cell FSM */
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/* (C) 2020 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
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* Author: Pau Espin Pedrol <pespin@sysmocom.de>
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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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*/
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#include <errno.h>
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#include <unistd.h>
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#include <inttypes.h>
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#include <osmocom/core/fsm.h>
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#include <osmocom/core/tdef.h>
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#include <osmocom/gsm/protocol/gsm_12_21.h>
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#include <osmocom/bsc/bts.h>
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#include <osmocom/bsc/signal.h>
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#include <osmocom/bsc/abis_nm.h>
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#include <osmocom/bsc/bts_ipaccess_nanobts_omlattr.h>
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#include <osmocom/bsc/nm_common_fsm.h>
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#include <osmocom/bsc/debug.h>
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#define X(s) (1 << (s))
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#define nm_gprs_cell_fsm_state_chg(fi, NEXT_STATE) \
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osmo_fsm_inst_state_chg(fi, NEXT_STATE, 0, 0)
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//////////////////////////
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// FSM STATE ACTIONS
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//////////////////////////
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static void st_op_disabled_notinstalled_on_enter(struct osmo_fsm_inst *fi, uint32_t prev_state)
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{
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struct gsm_gprs_cell *cell = (struct gsm_gprs_cell *)fi->priv;
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cell->mo.sw_act_rep_received = false;
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cell->mo.get_attr_sent = false;
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cell->mo.get_attr_rep_received = false;
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cell->mo.set_attr_sent = false;
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cell->mo.set_attr_ack_received = false;
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cell->mo.adm_unlock_sent = false;
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cell->mo.opstart_sent = false;
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}
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static void st_op_disabled_notinstalled(struct osmo_fsm_inst *fi, uint32_t event, void *data)
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{
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struct gsm_gprs_cell *cell = (struct gsm_gprs_cell *)fi->priv;
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struct nm_statechg_signal_data *nsd;
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const struct gsm_nm_state *new_state;
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switch (event) {
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case NM_EV_SW_ACT_REP:
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cell->mo.sw_act_rep_received = true;
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break;
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case NM_EV_SETUP_RAMP_READY:
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break;
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case NM_EV_STATE_CHG_REP:
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nsd = (struct nm_statechg_signal_data *)data;
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new_state = &nsd->new_state;
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if (new_state->operational == NM_OPSTATE_ENABLED) {
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/* should not happen... */
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nm_gprs_cell_fsm_state_chg(fi, NM_GPRS_CELL_ST_OP_ENABLED);
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return;
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}
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switch (new_state->availability) { /* operational = DISABLED */
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case NM_AVSTATE_DEPENDENCY:
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nm_gprs_cell_fsm_state_chg(fi, NM_GPRS_CELL_ST_OP_DISABLED_DEPENDENCY);
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return;
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case NM_AVSTATE_OFF_LINE:
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case NM_AVSTATE_OK:
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nm_gprs_cell_fsm_state_chg(fi, NM_GPRS_CELL_ST_OP_DISABLED_OFFLINE);
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return;
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default:
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return;
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}
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default:
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OSMO_ASSERT(0);
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}
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}
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static void configure_loop(struct gsm_gprs_cell *cell, const struct gsm_nm_state *state, bool allow_opstart)
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{
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struct msgb *msgb;
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struct gsm_bts *bts = container_of(cell, struct gsm_bts, gprs.cell);
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if (bts->gprs.mode == BTS_GPRS_NONE)
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return;
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if (bts_setup_ramp_wait(bts))
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return;
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/* nanoBTS only: delay until SW Activated Report is received, which
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* tells us the IPA Object version (may be used to set attr conditionally). */
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if (is_nanobts(bts) && !cell->mo.sw_act_rep_received)
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return;
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if (!cell->mo.get_attr_sent && !cell->mo.get_attr_rep_received) {
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uint8_t attr_buf[2]; /* enlarge if needed */
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uint8_t *ptr = &attr_buf[0];
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*(ptr++) = NM_ATT_SW_CONFIG;
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if (is_ipa_abisip_bts(bts))
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*(ptr++) = NM_ATT_IPACC_SUPP_FEATURES;
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OSMO_ASSERT((ptr - attr_buf) <= sizeof(attr_buf));
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abis_nm_get_attr(bts, NM_OC_GPRS_CELL,
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bts->bts_nr, 0x00, 0xff,
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&attr_buf[0], (ptr - attr_buf));
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cell->mo.get_attr_sent = true;
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}
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/* OS#6172: old osmo-bts versions do NACK Get Attributes for GPRS Cell,
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* so we do not check if cell->mo.get_attr_rep_received is set here. */
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if (!cell->mo.set_attr_sent && !cell->mo.set_attr_ack_received) {
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cell->mo.set_attr_sent = true;
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msgb = nanobts_gen_set_cell_attr(bts);
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OSMO_ASSERT(msgb);
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abis_nm_ipaccess_set_attr(bts, NM_OC_GPRS_CELL, bts->bts_nr,
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0, 0xff, msgb->data, msgb->len);
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msgb_free(msgb);
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}
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if (state->administrative != NM_STATE_UNLOCKED && !cell->mo.adm_unlock_sent) {
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cell->mo.adm_unlock_sent = true;
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abis_nm_chg_adm_state(bts, NM_OC_GPRS_CELL,
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bts->bts_nr, 0, 0xff,
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NM_STATE_UNLOCKED);
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}
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if (allow_opstart && state->administrative == NM_STATE_UNLOCKED &&
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cell->mo.set_attr_ack_received) {
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if (!cell->mo.opstart_sent) {
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cell->mo.opstart_sent = true;
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abis_nm_opstart(bts, NM_OC_GPRS_CELL, bts->bts_nr, 0, 0xff);
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}
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}
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}
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static void st_op_disabled_dependency_on_enter(struct osmo_fsm_inst *fi, uint32_t prev_state)
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{
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struct gsm_gprs_cell *cell = (struct gsm_gprs_cell *)fi->priv;
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struct gsm_bts *bts = container_of(cell, struct gsm_bts, gprs.cell);
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/* nanoBTS is broken, doesn't follow TS 12.21. Opstart MUST be sent
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during Dependency, so we simply move to OFFLINE state here to avoid
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duplicating code */
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if (bts->site_mgr->peer_has_no_avstate_offline) {
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nm_gprs_cell_fsm_state_chg(fi, NM_GPRS_CELL_ST_OP_DISABLED_OFFLINE);
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return;
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}
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configure_loop(cell, &cell->mo.nm_state, false);
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}
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static void st_op_disabled_dependency(struct osmo_fsm_inst *fi, uint32_t event, void *data)
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{
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struct gsm_gprs_cell *cell = (struct gsm_gprs_cell *)fi->priv;
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struct nm_statechg_signal_data *nsd;
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const struct gsm_nm_state *new_state;
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switch (event) {
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case NM_EV_SW_ACT_REP:
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cell->mo.sw_act_rep_received = true;
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configure_loop(cell, &cell->mo.nm_state, false);
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break;
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case NM_EV_GET_ATTR_REP:
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cell->mo.get_attr_rep_received = true;
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cell->mo.get_attr_sent = false;
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configure_loop(cell, &cell->mo.nm_state, false);
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return;
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case NM_EV_SET_ATTR_ACK:
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cell->mo.set_attr_ack_received = true;
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cell->mo.set_attr_sent = false;
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configure_loop(cell, &cell->mo.nm_state, false);
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return;
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case NM_EV_STATE_CHG_REP:
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nsd = (struct nm_statechg_signal_data *)data;
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new_state = &nsd->new_state;
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if (new_state->operational == NM_OPSTATE_ENABLED) {
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/* should not happen... */
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nm_gprs_cell_fsm_state_chg(fi, NM_GPRS_CELL_ST_OP_ENABLED);
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return;
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}
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switch (new_state->availability) { /* operational = DISABLED */
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case NM_AVSTATE_NOT_INSTALLED:
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case NM_AVSTATE_POWER_OFF:
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nm_gprs_cell_fsm_state_chg(fi, NM_GPRS_CELL_ST_OP_DISABLED_NOTINSTALLED);
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return;
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case NM_AVSTATE_OFF_LINE:
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case NM_AVSTATE_OK:
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nm_gprs_cell_fsm_state_chg(fi, NM_GPRS_CELL_ST_OP_DISABLED_OFFLINE);
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return;
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case NM_AVSTATE_DEPENDENCY:
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configure_loop(cell, new_state, false);
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return;
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default:
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return;
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}
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case NM_EV_SETUP_RAMP_READY:
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configure_loop(cell, &cell->mo.nm_state, false);
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break;
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default:
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OSMO_ASSERT(0);
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}
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}
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static void st_op_disabled_offline_on_enter(struct osmo_fsm_inst *fi, uint32_t prev_state)
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{
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struct gsm_gprs_cell *cell = (struct gsm_gprs_cell *)fi->priv;
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configure_loop(cell, &cell->mo.nm_state, true);
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}
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static void st_op_disabled_offline(struct osmo_fsm_inst *fi, uint32_t event, void *data)
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{
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struct gsm_gprs_cell *cell = (struct gsm_gprs_cell *)fi->priv;
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struct gsm_bts *bts = container_of(cell, struct gsm_bts, gprs.cell);
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struct nm_statechg_signal_data *nsd;
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const struct gsm_nm_state *new_state;
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switch (event) {
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case NM_EV_SW_ACT_REP:
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cell->mo.sw_act_rep_received = true;
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configure_loop(cell, &cell->mo.nm_state, true);
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break;
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case NM_EV_GET_ATTR_REP:
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cell->mo.get_attr_rep_received = true;
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cell->mo.get_attr_sent = false;
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configure_loop(cell, &cell->mo.nm_state, true);
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return;
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case NM_EV_SET_ATTR_ACK:
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cell->mo.set_attr_ack_received = true;
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cell->mo.set_attr_sent = false;
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configure_loop(cell, &cell->mo.nm_state, true);
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return;
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case NM_EV_STATE_CHG_REP:
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nsd = (struct nm_statechg_signal_data *)data;
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new_state = &nsd->new_state;
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if (new_state->operational == NM_OPSTATE_ENABLED) {
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nm_gprs_cell_fsm_state_chg(fi, NM_GPRS_CELL_ST_OP_ENABLED);
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return;
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}
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switch (new_state->availability) { /* operational = DISABLED */
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case NM_AVSTATE_NOT_INSTALLED:
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case NM_AVSTATE_POWER_OFF:
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nm_gprs_cell_fsm_state_chg(fi, NM_GPRS_CELL_ST_OP_DISABLED_NOTINSTALLED);
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return;
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case NM_AVSTATE_DEPENDENCY:
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/* There's no point in moving back to Dependency, since it's broken
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and it acts actually as if it was in Offline state */
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if (!bts->site_mgr->peer_has_no_avstate_offline) {
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nm_gprs_cell_fsm_state_chg(fi, NM_GPRS_CELL_ST_OP_DISABLED_DEPENDENCY);
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} else {
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/* Moreover, in nanoBTS we need to check here for tx
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Opstart since we may have gone Unlocked state
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in this event, which means Opstart may be txed here. */
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configure_loop(cell, new_state, true);
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}
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return;
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case NM_AVSTATE_OFF_LINE:
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case NM_AVSTATE_OK:
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configure_loop(cell, new_state, true);
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return;
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default:
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return;
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}
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case NM_EV_SETUP_RAMP_READY:
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configure_loop(cell, &cell->mo.nm_state, true);
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break;
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default:
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OSMO_ASSERT(0);
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}
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}
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static void st_op_enabled_on_enter(struct osmo_fsm_inst *fi, uint32_t prev_state)
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{
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struct gsm_gprs_cell *cell = (struct gsm_gprs_cell *)fi->priv;
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/* Reset state, we don't need it in this state and it will need to be
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reused as soon as we move back to Disabled */
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cell->mo.opstart_sent = false;
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cell->mo.adm_unlock_sent = false;
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cell->mo.set_attr_ack_received = false;
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cell->mo.set_attr_sent = false;
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}
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static void st_op_enabled(struct osmo_fsm_inst *fi, uint32_t event, void *data)
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{
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struct nm_statechg_signal_data *nsd;
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const struct gsm_nm_state *new_state;
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switch (event) {
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case NM_EV_STATE_CHG_REP:
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nsd = (struct nm_statechg_signal_data *)data;
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new_state = &nsd->new_state;
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if (new_state->operational == NM_OPSTATE_ENABLED)
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return;
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switch (new_state->availability) { /* operational = DISABLED */
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case NM_AVSTATE_NOT_INSTALLED:
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case NM_AVSTATE_POWER_OFF:
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nm_gprs_cell_fsm_state_chg(fi, NM_GPRS_CELL_ST_OP_DISABLED_NOTINSTALLED);
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return;
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case NM_AVSTATE_DEPENDENCY:
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nm_gprs_cell_fsm_state_chg(fi, NM_GPRS_CELL_ST_OP_DISABLED_DEPENDENCY);
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return;
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case NM_AVSTATE_OFF_LINE:
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case NM_AVSTATE_OK:
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nm_gprs_cell_fsm_state_chg(fi, NM_GPRS_CELL_ST_OP_DISABLED_OFFLINE);
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return;
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default:
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return;
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}
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default:
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OSMO_ASSERT(0);
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}
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}
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static void st_op_allstate(struct osmo_fsm_inst *fi, uint32_t event, void *data)
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{
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struct gsm_gprs_cell *cell = (struct gsm_gprs_cell *)fi->priv;
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struct gsm_bts *bts = container_of(cell, struct gsm_bts, gprs.cell);
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switch (event) {
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case NM_EV_OPSTART_ACK:
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case NM_EV_OPSTART_NACK:
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/* TODO: if on state OFFLINE and rx NACK, try again? */
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cell->mo.opstart_sent = false;
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break;
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case NM_EV_FORCE_LOCK:
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cell->mo.force_rf_lock = (bool)(intptr_t)data;
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abis_nm_chg_adm_state(bts, NM_OC_GPRS_CELL,
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bts->bts_nr, 0, 0xff,
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cell->mo.force_rf_lock ? NM_STATE_LOCKED : NM_STATE_UNLOCKED);
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break;
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case NM_EV_OML_DOWN:
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if (fi->state != NM_GPRS_CELL_ST_OP_DISABLED_NOTINSTALLED)
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nm_gprs_cell_fsm_state_chg(fi, NM_GPRS_CELL_ST_OP_DISABLED_NOTINSTALLED);
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break;
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default:
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OSMO_ASSERT(0);
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}
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}
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static struct osmo_fsm_state nm_gprs_cell_fsm_states[] = {
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[NM_GPRS_CELL_ST_OP_DISABLED_NOTINSTALLED] = {
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.in_event_mask =
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X(NM_EV_SW_ACT_REP) |
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X(NM_EV_STATE_CHG_REP) |
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X(NM_EV_SETUP_RAMP_READY),
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.out_state_mask =
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X(NM_GPRS_CELL_ST_OP_DISABLED_DEPENDENCY) |
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X(NM_GPRS_CELL_ST_OP_DISABLED_OFFLINE) |
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X(NM_GPRS_CELL_ST_OP_ENABLED),
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.name = "DISABLED_NOTINSTALLED",
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.onenter = st_op_disabled_notinstalled_on_enter,
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.action = st_op_disabled_notinstalled,
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},
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[NM_GPRS_CELL_ST_OP_DISABLED_DEPENDENCY] = {
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.in_event_mask =
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X(NM_EV_SW_ACT_REP) |
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X(NM_EV_STATE_CHG_REP) |
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X(NM_EV_GET_ATTR_REP) |
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X(NM_EV_SET_ATTR_ACK) |
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X(NM_EV_SETUP_RAMP_READY),
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.out_state_mask =
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X(NM_GPRS_CELL_ST_OP_DISABLED_NOTINSTALLED) |
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X(NM_GPRS_CELL_ST_OP_DISABLED_OFFLINE) |
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X(NM_GPRS_CELL_ST_OP_ENABLED),
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.name = "DISABLED_DEPENDENCY",
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.onenter = st_op_disabled_dependency_on_enter,
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.action = st_op_disabled_dependency,
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},
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[NM_GPRS_CELL_ST_OP_DISABLED_OFFLINE] = {
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.in_event_mask =
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X(NM_EV_SW_ACT_REP) |
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X(NM_EV_STATE_CHG_REP) |
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X(NM_EV_GET_ATTR_REP) |
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X(NM_EV_SET_ATTR_ACK) |
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X(NM_EV_SETUP_RAMP_READY),
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.out_state_mask =
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X(NM_GPRS_CELL_ST_OP_DISABLED_NOTINSTALLED) |
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X(NM_GPRS_CELL_ST_OP_DISABLED_DEPENDENCY) |
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X(NM_GPRS_CELL_ST_OP_ENABLED),
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.name = "DISABLED_OFFLINE",
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.onenter = st_op_disabled_offline_on_enter,
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.action = st_op_disabled_offline,
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},
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[NM_GPRS_CELL_ST_OP_ENABLED] = {
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.in_event_mask =
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X(NM_EV_STATE_CHG_REP),
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.out_state_mask =
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X(NM_GPRS_CELL_ST_OP_DISABLED_NOTINSTALLED) |
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X(NM_GPRS_CELL_ST_OP_DISABLED_DEPENDENCY) |
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X(NM_GPRS_CELL_ST_OP_DISABLED_OFFLINE),
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.name = "ENABLED",
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.onenter = st_op_enabled_on_enter,
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.action = st_op_enabled,
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},
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};
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struct osmo_fsm nm_gprs_cell_fsm = {
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.name = "NM_GPRS_CELL_OP",
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.states = nm_gprs_cell_fsm_states,
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.num_states = ARRAY_SIZE(nm_gprs_cell_fsm_states),
|
|
.allstate_event_mask =
|
|
X(NM_EV_OPSTART_ACK) |
|
|
X(NM_EV_OPSTART_NACK) |
|
|
X(NM_EV_FORCE_LOCK) |
|
|
X(NM_EV_OML_DOWN),
|
|
.allstate_action = st_op_allstate,
|
|
.event_names = nm_fsm_event_names,
|
|
.log_subsys = DNM,
|
|
};
|
|
|
|
static __attribute__((constructor)) void nm_gprs_cell_fsm_init(void)
|
|
{
|
|
OSMO_ASSERT(osmo_fsm_register(&nm_gprs_cell_fsm) == 0);
|
|
}
|