68 lines
2.9 KiB
C
68 lines
2.9 KiB
C
/* tbf_fsm.h
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*
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* Copyright (C) 2021 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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (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 General Public License for more details.
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*/
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#pragma once
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#include <osmocom/core/fsm.h>
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#include <osmocom/core/tdef.h>
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#include <gprs_pcu.h>
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struct gprs_rlcmac_tbf;
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enum tbf_fsm_event {
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TBF_EV_ASSIGN_ADD_CCCH, /* An assignment is sent over CCCH and confirmation from MS is pending */
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TBF_EV_ASSIGN_ADD_PACCH, /* An assignment is sent over PACCH and confirmation from MS is pending */
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TBF_EV_ASSIGN_ACK_PACCH, /* We received a CTRL ACK confirming assignment started on PACCH */
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TBF_EV_ASSIGN_READY_CCCH, /* TBF Start Time timer triggered */
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TBF_EV_ASSIGN_PCUIF_CNF, /* Transmission of IMM.ASS for DL TBF to the MS confirmed by BTS over PCUIF */
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TBF_EV_DL_ACKNACK_MISS, /* DL TBF: We polled for DL ACK/NACK but we received none (POLL timeout) */
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TBF_EV_LAST_DL_DATA_SENT, /* DL TBF sends RLCMAC block containing last DL avilable data buffered */
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TBF_EV_LAST_UL_DATA_RECVD, /* UL TBF sends RLCMAC block containing last UL data (cv=0) */
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TBF_EV_FINAL_ACK_RECVD, /* DL ACK/NACK with FINAL_ACK=1 received from MS */
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TBF_EV_FINAL_UL_ACK_CONFIRMED, /* UL TBF: MS ACKs (CtrlAck or PktResReq) our UL ACK/NACK w/ FinalAckInd=1 */
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TBF_EV_MAX_N3101, /* MAX N3101 (max usf timeout) reached (UL TBF) */
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TBF_EV_MAX_N3103, /* MAX N3103 (max Pkt Ctrl Ack for last UL ACK/NACK timeout) reached (UL TBF) */
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TBF_EV_MAX_N3105, /* MAX N3105 (max poll timeout) reached (UL/DL TBF) */
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};
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enum tbf_fsm_states {
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TBF_ST_NEW = 0, /* new created TBF */
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TBF_ST_ASSIGN, /* wait for downlink assignment */
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TBF_ST_FLOW, /* RLC/MAC flow, resource needed */
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TBF_ST_FINISHED, /* flow finished, wait for release */
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TBF_ST_WAIT_RELEASE,/* wait for release or restart of DL TBF */
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TBF_ST_RELEASING, /* releasing, wait to free TBI/USF */
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};
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struct tbf_fsm_ctx {
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struct osmo_fsm_inst *fi;
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struct gprs_rlcmac_tbf* tbf; /* back pointer */
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uint32_t state_flags;
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unsigned int T_release; /* Timer to be used to end release: T3169 or T3195 */
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};
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extern const struct osmo_tdef_state_timeout tbf_fsm_timeouts[32];
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/* Transition to a state, using the T timer defined in tbf_fsm_timeouts.
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* The actual timeout value is in turn obtained from conn->T_defs.
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* Assumes local variable fi exists. */
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#define tbf_fsm_state_chg(fi, NEXT_STATE) \
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osmo_tdef_fsm_inst_state_chg(fi, NEXT_STATE, \
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tbf_fsm_timeouts, \
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the_pcu->T_defs, \
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-1)
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extern struct osmo_fsm tbf_fsm;
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