| /* gprs_rlcmac.h |
| * |
| * Copyright (C) 2012 Ivan Klyuchnikov |
| * |
| * 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. |
| */ |
| |
| #ifndef GPRS_RLCMAC_H |
| #define GPRS_RLCMAC_H |
| |
| #include <bitvector.h> |
| #include <gsm_rlcmac.h> |
| #include <gsm_timer.h> |
| |
| extern "C" { |
| #include <osmocom/core/linuxlist.h> |
| #include <osmocom/core/timer.h> |
| } |
| |
| /* |
| * PDCH instanc |
| */ |
| |
| struct gprs_rlcmac_tbf; |
| |
| struct gprs_rlcmac_pdch { |
| uint8_t enable; /* 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) */ |
| struct gprs_rlcmac_tbf *tbf[32]; /* array of TBF pointers, by TFI */ |
| }; |
| |
| struct gprs_rlcmac_trx { |
| uint16_t arfcn; |
| struct gprs_rlcmac_pdch pdch[8]; |
| }; |
| |
| struct gprs_rlcmac_bts { |
| struct gprs_rlcmac_trx trx[8]; |
| }; |
| |
| extern struct gprs_rlcmac_bts *gprs_rlcmac_bts; |
| |
| /* |
| * TBF instance |
| */ |
| |
| #define LLC_MAX_LEN 1543 |
| #define RLC_MAX_SNS 128 /* GPRS, must be power of 2 */ |
| #define RLC_MAX_WS 64 /* max window size */ |
| #define RLC_MAX_LEN 52 /* CS-4 */ |
| #define UL_RLC_DATA_BLOCK_LEN 23 |
| |
| #define T3169 6 /* 5 seconds + one second, because we don't use |
| * counters before starting timer. */ |
| #define N3103_MAX 4 /* how many tries to poll PACKET CONTROL ACK */ |
| |
| enum gprs_rlcmac_tbf_state { |
| GPRS_RLCMAC_FLOW, /* RLC/MAC flow, ressource needed */ |
| GPRS_RLCMAC_FINISHED, /* flow finished, wait for release */ |
| GPRS_RLCMAC_RELEASING, /* releasing, wait to free TBI/USF */ |
| }; |
| |
| enum gprs_rlcmac_tbf_poll_state { |
| GPRS_RLCMAC_POLL_NONE = 0, |
| GPRS_RLCMAC_POLL_SCHED, /* a polling was scheduled */ |
| }; |
| |
| enum gprs_rlcmac_tbf_ul_substate { |
| GPRS_RLCMAC_UL_NONE = 0, |
| GPRS_RLCMAC_UL_SEND_ACK, /* send acknowledge on next RTS */ |
| GPRS_RLCMAC_UL_WAIT_POLL, /* wait for PACKET CONTROL ACK */ |
| }; |
| |
| enum gprs_rlcmac_tbf_direction { |
| GPRS_RLCMAC_DL_TBF, |
| GPRS_RLCMAC_UL_TBF |
| }; |
| |
| struct gprs_rlcmac_tbf { |
| struct llist_head list; |
| enum gprs_rlcmac_tbf_state state; |
| enum gprs_rlcmac_tbf_direction direction; |
| uint8_t tfi; |
| uint32_t tlli; |
| uint8_t tlli_valid; |
| uint8_t trx, ts, tsc; |
| uint16_t arfcn, ta; |
| uint8_t llc_frame[LLC_MAX_LEN]; |
| uint16_t llc_index; |
| |
| enum gprs_rlcmac_tbf_poll_state poll_state; |
| uint32_t poll_fn; |
| |
| uint16_t bsn; /* block sequence number */ |
| uint16_t ws; /* window size */ |
| uint16_t sns; /* sequence number space */ |
| union { |
| struct { |
| uint16_t v_s; /* send state */ |
| uint16_t v_a; /* ack state */ |
| char v_b[RLC_MAX_SNS/2]; /* acknowledge state array */ |
| } dl; |
| struct { |
| uint16_t v_r; /* receive state */ |
| uint16_t v_q; /* receive window state */ |
| char v_n[RLC_MAX_SNS/2]; /* receive state array */ |
| int32_t rx_counter; /* count all received blocks */ |
| enum gprs_rlcmac_tbf_ul_substate substate; |
| uint8_t usf; /* USF */ |
| uint8_t n3103; /* N3103 counter */ |
| } ul; |
| } dir; |
| uint8_t rlc_block[RLC_MAX_SNS/2][RLC_MAX_LEN]; /* block history */ |
| uint8_t rlc_block_len[RLC_MAX_SNS/2]; /* block len of history */ |
| |
| struct osmo_timer_list timer; |
| unsigned int T; /* Txxxx number */ |
| unsigned int num_T_exp; /* number of consecutive T expirations */ |
| |
| struct osmo_gsm_timer_list gsm_timer; |
| unsigned int fT; /* fTxxxx number */ |
| unsigned int num_fT_exp; /* number of consecutive fT expirations */ |
| }; |
| |
| extern struct llist_head gprs_rlcmac_tbfs; |
| |
| int tfi_alloc(uint8_t *_trx, uint8_t *_ts); |
| |
| struct gprs_rlcmac_tbf *tbf_alloc(uint8_t tfi, uint8_t trx, uint8_t ts); |
| |
| struct gprs_rlcmac_tbf *tbf_by_tfi(uint8_t tfi); |
| |
| struct gprs_rlcmac_tbf *tbf_by_tlli(uint8_t tlli); |
| |
| void tbf_free(struct gprs_rlcmac_tbf *tbf); |
| |
| void tbf_timer_start(struct gprs_rlcmac_tbf *tbf, unsigned int T, |
| unsigned int seconds); |
| |
| void tbf_timer_stop(struct gprs_rlcmac_tbf *tbf); |
| |
| /* TS 44.060 Section 10.4.7 Table 10.4.7.1: Payload Type field */ |
| enum gprs_rlcmac_block_type { |
| GPRS_RLCMAC_DATA_BLOCK = 0x0, |
| GPRS_RLCMAC_CONTROL_BLOCK = 0x1, |
| GPRS_RLCMAC_CONTROL_BLOCK_OPT = 0x2, |
| GPRS_RLCMAC_RESERVED = 0x3 |
| }; |
| |
| void gprs_rlcmac_tx_ul_ack(uint8_t tfi, uint32_t tlli, RlcMacUplinkDataBlock_t * ul_data_block); |
| |
| void gprs_rlcmac_data_block_parse(gprs_rlcmac_tbf* tbf, RlcMacUplinkDataBlock_t * ul_data_block); |
| |
| int gprs_rlcmac_rcv_data_block(bitvec *rlc_block); |
| |
| int gprs_rlcmac_rcv_control_block(bitvec *rlc_block); |
| |
| int gprs_rlcmac_rcv_block(uint8_t *data, uint8_t len, uint32_t fn); |
| |
| int gprs_rlcmac_rcv_rts_block(uint8_t trx, uint8_t ts, uint16_t arfcn, |
| uint32_t fn, uint8_t block_nr); |
| |
| int gprs_rlcmac_rcv_rach(uint8_t ra, uint32_t Fn, int16_t qta); |
| |
| void gprs_rlcmac_tx_dl_data_block(uint32_t tlli, uint8_t tfi, uint8_t *pdu, int start_index, int end_index, uint8_t bsn, uint8_t fbi); |
| |
| int gprs_rlcmac_segment_llc_pdu(struct gprs_rlcmac_tbf *tbf); |
| |
| void gprs_rlcmac_tx_ul_ud(gprs_rlcmac_tbf *tbf); |
| |
| void gprs_rlcmac_downlink_assignment(gprs_rlcmac_tbf *tbf); |
| |
| void gprs_rlcmac_packet_downlink_assignment(gprs_rlcmac_tbf *tbf); |
| |
| void gprs_rlcmac_enqueue_block(bitvec *block, int len); |
| |
| int gprs_rlcmac_rcv_data_block_acknowledged(uint8_t *data, uint8_t len); |
| |
| struct msgb *gprs_rlcmac_send_uplink_ack(struct gprs_rlcmac_tbf *tbf, |
| uint32_t fn); |
| |
| #endif // GPRS_RLCMAC_H |