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/pdch.h

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/* pdch.h
*
* Copyright (C) 2012 Ivan Klyuchnikov
* Copyright (C) 2013 by Holger Hans Peter Freyther
* Copyright (C) 2018 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
#include <inttypes.h>
#ifdef __cplusplus
extern "C" {
#include <osmocom/core/linuxlist.h>
#include "gsm_rlcmac.h"
#include "coding_scheme.h"
#include "pdch_ul_controller.h"
}
#endif
#include <tbf.h>
#include <stdint.h>
/* PTCCH (Packet Timing Advance Control Channel) */
#define PTCCH_TAI_FREE 0x7f /*!< Special value for unused TA Indexes */
#define PTCCH_TAI_NUM 16 /*!< Number of PTCCH/U slots and thus TA Indexes */
#define PTCCH_PADDING 0x2b /*!< PTCCH/D messages need to be padded to 23 octets */
#define USF_UNUSED 0x07
/* 3GPP TS 05.08 version 8.23.0 "10.2.2 BTS output power". 360 ms */
#define MS_RESYNC_NUM_FRAMES 18
/*
* PDCH instance
*/
struct gprs_rlcmac_pdch {
#ifdef __cplusplus
struct gprs_rlcmac_paging *dequeue_paging();
struct msgb *packet_paging_request();
bool add_paging(uint8_t chan_needed, const struct osmo_mobile_identity *mi);
bool is_enabled() const;
void enable();
void disable();
/* dispatching of messages */
int rcv_block(uint8_t *data, uint8_t len, uint32_t fn,
struct pcu_l1_meas *meas);
int rcv_block_gprs(uint8_t *data, uint8_t data_len, uint32_t fn,
struct pcu_l1_meas *meas, enum CodingScheme cs);
int rcv_data_block(uint8_t *data, uint8_t data_len, uint32_t fn,
struct pcu_l1_meas *meas, enum CodingScheme cs);
struct gprs_rlcmac_bts *bts() const;
uint8_t trx_no() const;
struct gprs_rlcmac_ul_tbf *ul_tbf_by_tfi(uint8_t tfi);
struct gprs_rlcmac_dl_tbf *dl_tbf_by_tfi(uint8_t tfi);
void attach_tbf(gprs_rlcmac_tbf *tbf);
void detach_tbf(gprs_rlcmac_tbf *tbf);
unsigned num_tbfs(enum gprs_rlcmac_tbf_direction dir) const;
void num_tbfs_update(gprs_rlcmac_tbf *tbf, bool is_attach);
void reserve(enum gprs_rlcmac_tbf_direction dir);
void unreserve(enum gprs_rlcmac_tbf_direction dir);
unsigned num_reserved(enum gprs_rlcmac_tbf_direction dir) const;
uint8_t assigned_usf() const;
uint32_t assigned_tfi(enum gprs_rlcmac_tbf_direction dir) const;
bool has_gprs_only_tbf_attached() const;
#endif
uint8_t m_is_enabled; /* TS is enabled */
uint8_t tsc; /* TSC of this slot */
uint8_t next_ul_tfi; /* next uplink TBF/TFI to schedule (0..31) */
uint8_t next_dl_tfi; /* next downlink TBF/TFI to schedule (0..31) */
uint8_t next_ctrl_prio; /* next kind of ctrl message to schedule */
struct llist_head paging_list; /* list of paging messages */
uint32_t last_rts_fn; /* store last frame number of RTS */
/* store number of contiguous frame number where a DL block was transmitted which can be decoded by GPRS-only MS */
uint32_t fn_without_cs14;
/* PTCCH (Packet Timing Advance Control Channel) */
uint8_t ptcch_msg[GSM_MACBLOCK_LEN]; /* 'ready to use' PTCCH/D message */
#ifdef __cplusplus
/* Obtain an unused TA Index for a TBF */
uint8_t reserve_tai(uint8_t ta);
/* Mark a given TA Index as free, so it can be used again */
void release_tai(uint8_t tai);
/* Update the actual Timing Advance value for a given TA Index */
void update_ta(uint8_t tai, uint8_t ta);
#endif
/* Frequency hopping parameters */
struct {
bool enabled;
/* 3GPP TS 45.002 HSN / MAIO (6 bit each) */
uint8_t hsn;
uint8_t maio;
/* 3GPP TS 44.018, 10.5.2.21 "Mobile Allocation" */
uint8_t ma_oct_len;
uint8_t ma_bit_len;
uint8_t ma[8];
} fh;
/* back pointers */
struct gprs_rlcmac_trx *trx;
uint8_t ts_no;
struct pdch_ulc *ulc;
#ifdef __cplusplus
private:
int rcv_control_block(const uint8_t *data, uint8_t data_len, uint32_t fn,
struct pcu_l1_meas *meas, enum CodingScheme cs);
void rcv_control_ack(Packet_Control_Acknowledgement_t *, uint32_t fn);
void rcv_control_dl_ack_nack(Packet_Downlink_Ack_Nack_t *, uint32_t fn, struct pcu_l1_meas *meas);
void rcv_control_egprs_dl_ack_nack(EGPRS_PD_AckNack_t *, uint32_t fn, struct pcu_l1_meas *meas);
void rcv_resource_request(Packet_Resource_Request_t *t, uint32_t fn, struct pcu_l1_meas *meas);
void rcv_measurement_report(Packet_Measurement_Report_t *t, uint32_t fn);
void rcv_cell_change_notification(Packet_Cell_Change_Notification_t *, uint32_t fn, struct pcu_l1_meas *meas);
gprs_rlcmac_tbf *tbf_from_list_by_tfi(
LListHead<gprs_rlcmac_tbf> *tbf_list, uint8_t tfi,
enum gprs_rlcmac_tbf_direction dir);
gprs_rlcmac_tbf *tbf_by_tfi(uint8_t tfi,
enum gprs_rlcmac_tbf_direction dir);
void free_resources();
#endif
uint8_t m_num_tbfs_gprs[2];
uint8_t m_num_tbfs_egprs[2];
uint8_t m_num_reserved[2];
uint8_t m_assigned_usf; /* bit set */
uint32_t m_assigned_tfi[2]; /* bit set */
struct gprs_rlcmac_tbf *m_tbfs[2][32];
};
#ifdef __cplusplus
inline unsigned gprs_rlcmac_pdch::num_tbfs(enum gprs_rlcmac_tbf_direction dir) const
{
return m_num_tbfs_gprs[dir] + m_num_tbfs_egprs[dir];
}
inline unsigned gprs_rlcmac_pdch::num_reserved(
enum gprs_rlcmac_tbf_direction dir) const
{
return gprs_rlcmac_pdch::m_num_reserved[dir];
}
inline uint8_t gprs_rlcmac_pdch::assigned_usf() const
{
return m_assigned_usf;
}
inline uint32_t gprs_rlcmac_pdch::assigned_tfi(
enum gprs_rlcmac_tbf_direction dir) const
{
return m_assigned_tfi[dir];
}
inline bool gprs_rlcmac_pdch::is_enabled() const
{
return m_is_enabled;
}
#endif /* __cplusplus */
#ifdef __cplusplus
extern "C" {
#endif
void pdch_init(struct gprs_rlcmac_pdch *pdch, struct gprs_rlcmac_trx *trx, uint8_t ts_nr);
void pdch_free_all_tbf(struct gprs_rlcmac_pdch *pdch);
void pdch_disable(struct gprs_rlcmac_pdch *pdch);
bool pdch_is_enabled(const struct gprs_rlcmac_pdch *pdch);
#ifdef __cplusplus
}
#endif
#define LOGPDCH(pdch, category, level, fmt, args...) \
LOGP(category, level, "PDCH(bts=%" PRIu8 ",trx=%" PRIu8 ",ts=%" PRIu8 ") " fmt, \
(pdch)->trx->bts->nr, (pdch)->trx->trx_no, (pdch)->ts_no, \
## args)