Osmocom Packet control Unit (PCU): Network-side GPRS (RLC/MAC); BTS- or BSC-colocated https://osmocom.org/projects/osmopcu
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 
osmo-pcu/src/pdch_ul_controller.h

103 lines
3.6 KiB

/* pdch_ul_controller.h
*
* Copyright (C) 2021 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
* Author: Pau Espin Pedrol <pespin@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 <stdint.h>
#include <stdbool.h>
#include <osmocom/core/linuxrbtree.h>
#include <osmocom/core/utils.h>
struct gprs_rlcmac_pdch;
struct gprs_rlcmac_tbf;
struct gprs_rlcmac_ul_tbf;
struct gprs_rlcmac_sba;
/* RRBP offsets, see TS 44.060 able 10.4.5.1 */
enum rrbp_field {
RRBP_N_plus_13 = 0x0,
RRBP_N_plus_17_18 = 0x1,
RRBP_N_plus_21_22 = 0x2,
RRBP_N_plus_26 = 0x3,
};
struct pdch_ulc {
struct gprs_rlcmac_pdch *pdch; /* back pointer */
uint32_t last_fn; /* last FN rx from TDMA clock */
struct rb_root tree_root;
void *pool_ctx; /* talloc pool of struct pdch_ulc_node */
};
enum PdchUlcNode {
PDCH_ULC_NODE_TBF_USF,
PDCH_ULC_NODE_TBF_POLL,
PDCH_ULC_NODE_SBA,
};
extern const struct value_string pdch_ul_node_names[];
enum pdch_ulc_tbf_poll_reason {
PDCH_ULC_POLL_UL_ASS, /* Expect CTRL ACK for UL ASS we transmit */
PDCH_ULC_POLL_DL_ASS, /* Expect CTRL ACK for DL ASS we transmit */
PDCH_ULC_POLL_UL_ACK, /* Expect CTRL ACK (or PKT RES REQ on final UL ACK/NACK) for UL ACK/NACK we transmit */
PDCH_ULC_POLL_DL_ACK, /* Expect DL ACK/NACK requested by RRBP */
PDCH_ULC_POLL_CELL_CHG_CONTINUE, /* Expect CTRL ACK for Pkt cell Change Continue we transmit */
};
extern const struct value_string pdch_ulc_tbf_poll_reason_names[];
struct pdch_ulc_node {
struct rb_node node; /*! entry in pdch_ulc->tree_root */
uint32_t fn;
enum PdchUlcNode type;
union {
struct {
struct gprs_rlcmac_ul_tbf *ul_tbf;
} tbf_usf;
struct {
struct gprs_rlcmac_tbf *poll_tbf;
enum pdch_ulc_tbf_poll_reason reason;
} tbf_poll;
struct {
struct gprs_rlcmac_sba *sba;
} sba;
};
};
struct pdch_ulc *pdch_ulc_alloc(struct gprs_rlcmac_pdch *pdch, void *ctx);
int pdch_ulc_reserve_tbf_usf(struct pdch_ulc *ulc, uint32_t fn, struct gprs_rlcmac_ul_tbf *ul_tbf);
int pdch_ulc_reserve_tbf_poll(struct pdch_ulc *ulc, uint32_t fn, struct gprs_rlcmac_tbf *tbf, enum pdch_ulc_tbf_poll_reason reason);
int pdch_ulc_reserve_sba(struct pdch_ulc *ulc, struct gprs_rlcmac_sba *sba);
bool pdch_ulc_fn_is_free(struct pdch_ulc *ulc, uint32_t fn);
int pdch_ulc_get_next_free_rrbp_fn(struct pdch_ulc *ulc, uint32_t fn, uint32_t *poll_fn, unsigned int *rrbp);
uint32_t pdch_ulc_get_next_free_fn(struct pdch_ulc *ulc, uint32_t start_fn);
struct pdch_ulc_node *pdch_ulc_get_node(struct pdch_ulc *ulc, uint32_t fn);
struct pdch_ulc_node *pdch_ulc_pop_node(struct pdch_ulc *ulc, uint32_t fn);
struct gprs_rlcmac_sba *pdch_ulc_get_sba(struct pdch_ulc *ulc, uint32_t fn);
struct gprs_rlcmac_tbf *pdch_ulc_get_tbf_poll(struct pdch_ulc *ulc, uint32_t fn);
void pdch_ulc_release_node(struct pdch_ulc *ulc, struct pdch_ulc_node *item);
void pdch_ulc_release_tbf(struct pdch_ulc *ulc, const struct gprs_rlcmac_tbf *tbf);
int pdch_ulc_release_fn(struct pdch_ulc *ulc, uint32_t fn);
void pdch_ulc_expire_fn(struct pdch_ulc *ulc, uint32_t fn);