| /* |
| * Copyright (C) 2013 by Holger Hans Peter Freyther |
| * |
| * 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 "gprs_rlcmac.h" |
| |
| #include <stdint.h> |
| |
| struct bssgp_bvc_ctx; |
| |
| /* |
| * 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 54 /* CS-4 including spare bits */ |
| |
| #define Tassign_agch 0,200000 /* waiting after IMM.ASS confirm */ |
| #define Tassign_pacch 2,0 /* timeout for pacch assigment */ |
| |
| enum gprs_rlcmac_tbf_state { |
| GPRS_RLCMAC_NULL = 0, /* new created TBF */ |
| GPRS_RLCMAC_ASSIGN, /* wait for downlink assignment */ |
| GPRS_RLCMAC_FLOW, /* RLC/MAC flow, resource needed */ |
| GPRS_RLCMAC_FINISHED, /* flow finished, wait for release */ |
| GPRS_RLCMAC_WAIT_RELEASE,/* wait for release or restart of DL TBF */ |
| 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_dl_ass_state { |
| GPRS_RLCMAC_DL_ASS_NONE = 0, |
| GPRS_RLCMAC_DL_ASS_SEND_ASS, /* send downlink assignment on next RTS */ |
| GPRS_RLCMAC_DL_ASS_WAIT_ACK, /* wait for PACKET CONTROL ACK */ |
| }; |
| |
| enum gprs_rlcmac_tbf_ul_ass_state { |
| GPRS_RLCMAC_UL_ASS_NONE = 0, |
| GPRS_RLCMAC_UL_ASS_SEND_ASS, /* send uplink assignment on next RTS */ |
| GPRS_RLCMAC_UL_ASS_WAIT_ACK, /* wait for PACKET CONTROL ACK */ |
| }; |
| |
| enum gprs_rlcmac_tbf_ul_ack_state { |
| GPRS_RLCMAC_UL_ACK_NONE = 0, |
| GPRS_RLCMAC_UL_ACK_SEND_ACK, /* send acknowledge on next RTS */ |
| GPRS_RLCMAC_UL_ACK_WAIT_ACK, /* wait for PACKET CONTROL ACK */ |
| }; |
| |
| enum gprs_rlcmac_tbf_direction { |
| GPRS_RLCMAC_DL_TBF, |
| GPRS_RLCMAC_UL_TBF |
| }; |
| |
| #define GPRS_RLCMAC_FLAG_CCCH 0 /* assignment on CCCH */ |
| #define GPRS_RLCMAC_FLAG_PACCH 1 /* assignment on PACCH */ |
| #define GPRS_RLCMAC_FLAG_UL_DATA 2 /* uplink data received */ |
| #define GPRS_RLCMAC_FLAG_DL_ACK 3 /* downlink acknowledge received */ |
| #define GPRS_RLCMAC_FLAG_TO_UL_ACK 4 |
| #define GPRS_RLCMAC_FLAG_TO_DL_ACK 5 |
| #define GPRS_RLCMAC_FLAG_TO_UL_ASS 6 |
| #define GPRS_RLCMAC_FLAG_TO_DL_ASS 7 |
| #define GPRS_RLCMAC_FLAG_TO_MASK 0xf0 /* timeout bits */ |
| |
| struct gprs_rlcmac_tbf { |
| |
| static void free_all(struct gprs_rlcmac_trx *trx); |
| static void free_all(struct gprs_rlcmac_pdch *pdch); |
| |
| bool state_is(enum gprs_rlcmac_tbf_state rhs) const; |
| bool state_is_not(enum gprs_rlcmac_tbf_state rhs) const; |
| void set_state(enum gprs_rlcmac_tbf_state new_state); |
| |
| /* TODO: add the gettimeofday as parameter */ |
| struct msgb *llc_dequeue(bssgp_bvc_ctx *bctx); |
| void update_llc_frame(struct msgb *msg); |
| |
| /* TODO: extract LLC class? */ |
| int assemble_forward_llc(uint8_t *data, uint8_t len); |
| |
| int rlcmac_diag(); |
| |
| int update(); |
| void handle_timeout(); |
| void stop_timer(); |
| void stop_t3191(); |
| |
| struct llist_head list; |
| uint32_t state_flags; |
| enum gprs_rlcmac_tbf_direction direction; |
| uint8_t tfi; |
| uint32_t tlli; |
| uint8_t tlli_valid; |
| struct gprs_rlcmac_trx *trx; |
| uint8_t trx_no; |
| uint16_t arfcn; |
| uint8_t tsc; |
| uint8_t first_ts; /* first TS used by TBF */ |
| uint8_t first_common_ts; /* first TS that the phone can send and |
| reveive simultaniously */ |
| uint8_t control_ts; /* timeslot control messages and polling */ |
| uint8_t ms_class; |
| struct gprs_rlcmac_pdch *pdch[8]; /* list of PDCHs allocated to TBF */ |
| uint16_t ta; |
| uint8_t llc_frame[LLC_MAX_LEN]; /* current DL or UL frame */ |
| uint16_t llc_index; /* current write/read position of frame */ |
| uint16_t llc_length; /* len of current DL LLC_frame, 0 == no frame */ |
| struct llist_head llc_queue; /* queued LLC DL data */ |
| |
| enum gprs_rlcmac_tbf_dl_ass_state dl_ass_state; |
| enum gprs_rlcmac_tbf_ul_ass_state ul_ass_state; |
| enum gprs_rlcmac_tbf_ul_ack_state ul_ack_state; |
| |
| enum gprs_rlcmac_tbf_poll_state poll_state; |
| uint32_t poll_fn; /* frame number to poll */ |
| |
| uint16_t ws; /* window size */ |
| uint16_t sns; /* sequence number space */ |
| |
| /* 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. |
| */ |
| union { |
| struct { |
| uint16_t bsn; /* block sequence number */ |
| uint16_t v_s; /* send state */ |
| uint16_t v_a; /* ack state */ |
| char v_b[RLC_MAX_SNS/2]; /* acknowledge state array */ |
| int32_t tx_counter; /* count all transmitted blocks */ |
| char imsi[16]; /* store IMSI for PCH retransmission */ |
| uint8_t wait_confirm; /* wait for CCCH IMM.ASS cnf */ |
| } dl; |
| struct { |
| uint16_t bsn; /* block sequence number */ |
| 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 */ |
| uint8_t n3103; /* N3103 counter */ |
| uint8_t usf[8]; /* list USFs per PDCH (timeslot) */ |
| uint8_t contention_resolution_done; /* set after done */ |
| uint8_t final_ack_sent; /* set if we sent final ack */ |
| } 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 */ |
| |
| uint8_t n3105; /* N3105 counter */ |
| |
| 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 */ |
| |
| struct { |
| char imsi[16]; |
| |
| struct timeval dl_bw_tv; /* timestamp for dl bw calculation */ |
| uint32_t dl_bw_octets; /* number of octets since bw_tv */ |
| |
| struct timeval rssi_tv; /* timestamp for rssi calculation */ |
| int32_t rssi_sum; /* sum of rssi values */ |
| int rssi_num; /* number of rssi values added since rssi_tv */ |
| |
| struct timeval dl_loss_tv; /* timestamp for loss calculation */ |
| uint16_t dl_loss_lost; /* sum of lost packets */ |
| uint16_t dl_loss_received; /* sum of received packets */ |
| |
| } meas; |
| |
| uint8_t cs; /* current coding scheme */ |
| |
| #ifdef DEBUG_DIAGRAM |
| int diag; /* number where TBF is presented in diagram */ |
| int diag_new; /* used to format output of new TBF */ |
| #endif |
| |
| /* these should become protected but only after gprs_rlcmac_data.c |
| * stops to iterate over all tbf in its current form */ |
| enum gprs_rlcmac_tbf_state state; |
| |
| /* store the BTS this TBF belongs to */ |
| BTS *bts; |
| }; |
| |
| |
| /* dispatch Unitdata.DL messages */ |
| int tbf_handle(struct gprs_rlcmac_bts *bts, |
| const uint32_t tlli, const char *imsi, const uint8_t ms_class, |
| const uint16_t delay_csec, const uint8_t *data, const uint16_t len); |
| |
| struct gprs_rlcmac_tbf *tbf_alloc_ul(struct gprs_rlcmac_bts *bts, |
| int8_t use_trx, uint8_t ms_class, |
| uint32_t tlli, uint8_t ta, struct gprs_rlcmac_tbf *dl_tbf); |
| |
| struct gprs_rlcmac_tbf *tbf_alloc(struct gprs_rlcmac_bts *bts, |
| struct gprs_rlcmac_tbf *old_tbf, |
| enum gprs_rlcmac_tbf_direction dir, uint8_t tfi, uint8_t trx, |
| uint8_t ms_class, uint8_t single_slot); |
| |
| void tbf_free(struct gprs_rlcmac_tbf *tbf); |
| |
| int tbf_assign_control_ts(struct gprs_rlcmac_tbf *tbf); |
| |
| void tbf_new_state(struct gprs_rlcmac_tbf *tbf, |
| enum gprs_rlcmac_tbf_state state); |
| |
| void tbf_timer_start(struct gprs_rlcmac_tbf *tbf, unsigned int T, |
| unsigned int seconds, unsigned int microseconds); |
| |
| inline bool gprs_rlcmac_tbf::state_is(enum gprs_rlcmac_tbf_state rhs) const |
| { |
| return state == rhs; |
| } |
| |
| inline bool gprs_rlcmac_tbf::state_is_not(enum gprs_rlcmac_tbf_state rhs) const |
| { |
| return state != rhs; |
| } |
| |
| inline void gprs_rlcmac_tbf::set_state(enum gprs_rlcmac_tbf_state new_state) |
| { |
| state = new_state; |
| } |