Osmocom Packet control Unit (PCU): Network-side GPRS (RLC/MAC); BTS- or BSC-colocated https://osmocom.org/projects/osmopcu
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osmo-pcu/src/tbf_ul.h

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/*
* Copyright (C) 2013 by Holger Hans Peter Freyther
* Copyright (C) 2019 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#pragma once
#ifdef __cplusplus
#include <stdbool.h>
#include "tbf.h"
#ifdef __cplusplus
extern "C" {
#endif
#include <tbf_ul_ack_fsm.h>
#ifdef __cplusplus
}
#endif
/*
* TBF instance
*/
enum tbf_gprs_ul_counters {
TBF_CTR_GPRS_UL_CS1,
TBF_CTR_GPRS_UL_CS2,
TBF_CTR_GPRS_UL_CS3,
TBF_CTR_GPRS_UL_CS4,
};
enum tbf_egprs_ul_counters {
TBF_CTR_EGPRS_UL_MCS1,
TBF_CTR_EGPRS_UL_MCS2,
TBF_CTR_EGPRS_UL_MCS3,
TBF_CTR_EGPRS_UL_MCS4,
TBF_CTR_EGPRS_UL_MCS5,
TBF_CTR_EGPRS_UL_MCS6,
TBF_CTR_EGPRS_UL_MCS7,
TBF_CTR_EGPRS_UL_MCS8,
TBF_CTR_EGPRS_UL_MCS9,
};
/* Used in ul_tbf->m_usf[] to flag unassigned USF on a given TS: */
#define USF_INVALID 0xFF
struct gprs_rlcmac_ul_tbf : public gprs_rlcmac_tbf {
gprs_rlcmac_ul_tbf(struct gprs_rlcmac_bts *bts, GprsMs *ms);
~gprs_rlcmac_ul_tbf();
gprs_rlc_window *window();
/* blocks were acked */
int rcv_data_block_acknowledged(
const struct gprs_rlc_data_info *rlc,
uint8_t *data, struct pcu_l1_meas *meas);
/* TODO: extract LLC class? */
int assemble_forward_llc(const gprs_rlc_data *data);
int snd_ul_ud();
egprs_rlc_ul_reseg_bsn_state handle_egprs_ul_spb(
const struct gprs_rlc_data_info *rlc,
struct gprs_rlc_data *block,
uint8_t *data, const uint8_t block_idx);
egprs_rlc_ul_reseg_bsn_state handle_egprs_ul_first_seg(
const struct gprs_rlc_data_info *rlc,
struct gprs_rlc_data *block,
uint8_t *data, const uint8_t block_idx);
egprs_rlc_ul_reseg_bsn_state handle_egprs_ul_second_seg(
const struct gprs_rlc_data_info *rlc,
struct gprs_rlc_data *block,
uint8_t *data, const uint8_t block_idx);
uint16_t window_size() const;
void set_window_size();
void update_coding_scheme_counter_ul(enum CodingScheme cs);
void usf_timeout();
void contention_resolution_start();
void contention_resolution_success();
/* Please note that all variables here will be reset when changing
* from WAIT RELEASE back to FLOW state (re-use of TBF).
* All states that need reset must be in this struct, so this is why
* variables are in both (dl and ul) structs and not outside union.
*/
int32_t m_rx_counter; /* count all received blocks */
uint8_t m_usf[8]; /* list USFs per PDCH (timeslot), initialized to USF_INVALID */
uint8_t m_contention_resolution_done; /* set after done */
struct rate_ctr_group *m_ul_gprs_ctrs;
struct rate_ctr_group *m_ul_egprs_ctrs;
struct tbf_ul_ass_fsm_ctx ul_ack_fsm;
protected:
void maybe_schedule_uplink_acknack(const gprs_rlc_data_info *rlc, bool countdown_finished);
/* Please note that all variables below will be reset when changing
* from WAIT RELEASE back to FLOW state (re-use of TBF).
* All states that need reset must be in this struct, so this is why
* variables are in both (dl and ul) structs and not outside union.
*/
gprs_rlc_ul_window m_window;
};
inline uint16_t gprs_rlcmac_ul_tbf::window_size() const
{
return m_window.ws();
}
struct gprs_rlcmac_ul_tbf *tbf_alloc_ul_tbf(struct gprs_rlcmac_bts *bts, GprsMs *ms, int8_t use_trx, bool single_slot);
struct gprs_rlcmac_ul_tbf *tbf_alloc_ul_pacch(struct gprs_rlcmac_bts *bts, GprsMs *ms, int8_t use_trx);
struct gprs_rlcmac_ul_tbf *tbf_alloc_ul_ccch(struct gprs_rlcmac_bts *bts, struct GprsMs *ms);
struct gprs_rlcmac_ul_tbf *handle_tbf_reject(struct gprs_rlcmac_bts *bts,
GprsMs *ms, uint8_t trx_no, uint8_t ts_no);
#else /* ifdef __cplusplus */
struct gprs_rlcmac_ul_tbf;
#endif
#ifdef __cplusplus
extern "C" {
#endif
void update_tbf_ta(struct gprs_rlcmac_ul_tbf *tbf, int8_t ta_delta);
void set_tbf_ta(struct gprs_rlcmac_ul_tbf *tbf, uint8_t ta);
struct gprs_rlcmac_ul_tbf *as_ul_tbf(struct gprs_rlcmac_tbf *tbf);
void tbf_usf_timeout(struct gprs_rlcmac_ul_tbf *tbf);
bool ul_tbf_contention_resolution_done(const struct gprs_rlcmac_ul_tbf *tbf);
struct osmo_fsm_inst *tbf_ul_ack_fi(const struct gprs_rlcmac_ul_tbf *tbf);
void ul_tbf_contention_resolution_success(struct gprs_rlcmac_ul_tbf *tbf);
#define LOGPTBFUL(tbf, level, fmt, args...) LOGP(DTBFUL, level, "%s " fmt, tbf_name(tbf), ## args)
#ifdef __cplusplus
}
#endif