/* * 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 "bts.h" #include /* * 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 */ extern struct llist_head gprs_rlcmac_ul_tbfs; /* list of uplink TBFs */ extern struct llist_head gprs_rlcmac_dl_tbfs; /* list of downlink TBFs */ extern struct llist_head gprs_rlcmac_sbas; /* list of single block allocs */ 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); int rlcmac_diag(); 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; }; /* 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); int tfi_find_free(struct gprs_rlcmac_bts *bts, enum gprs_rlcmac_tbf_direction dir, uint8_t *_trx, int8_t use_trx); 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); struct gprs_rlcmac_tbf *tbf_by_tfi(struct gprs_rlcmac_bts *bts, uint8_t tfi, uint8_t trx, enum gprs_rlcmac_tbf_direction dir); struct gprs_rlcmac_tbf *tbf_by_tlli(uint32_t tlli, enum gprs_rlcmac_tbf_direction dir); struct gprs_rlcmac_tbf *tbf_by_poll_fn(uint32_t fn, uint8_t trx, uint8_t ts); void tbf_free(struct gprs_rlcmac_tbf *tbf); int tbf_update(struct gprs_rlcmac_bts *bts, 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); void tbf_timer_stop(struct gprs_rlcmac_tbf *tbf); void tbf_timer_cb(void *_tbf); 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; }