diff options
Diffstat (limited to 'src/gprs_rlcmac.h')
| -rw-r--r-- | src/gprs_rlcmac.h | 103 |
1 files changed, 92 insertions, 11 deletions
diff --git a/src/gprs_rlcmac.h b/src/gprs_rlcmac.h index 83ef7bd9..50d2e84c 100644 --- a/src/gprs_rlcmac.h +++ b/src/gprs_rlcmac.h @@ -29,13 +29,60 @@ extern "C" { #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_WAIT_DATA_SEQ_START, - GPRS_RLCMAC_WAIT_NEXT_DATA_BLOCK, - GPRS_RLCMAC_WAIT_NEXT_DATA_SEQ + 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 { @@ -49,11 +96,36 @@ struct gprs_rlcmac_tbf { enum gprs_rlcmac_tbf_direction direction; uint8_t tfi; uint32_t tlli; - uint8_t rlc_data[LLC_MAX_LEN]; - uint16_t data_index; - uint8_t bsn; + 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 */ @@ -66,9 +138,7 @@ struct gprs_rlcmac_tbf { extern struct llist_head gprs_rlcmac_tbfs; -int select_pdch(uint8_t *_trx, uint8_t *_ts); - -int tfi_alloc(); +int tfi_alloc(uint8_t *_trx, uint8_t *_ts); struct gprs_rlcmac_tbf *tbf_alloc(uint8_t tfi, uint8_t trx, uint8_t ts); @@ -78,6 +148,11 @@ 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, @@ -94,9 +169,9 @@ int gprs_rlcmac_rcv_data_block(bitvec *rlc_block); int gprs_rlcmac_rcv_control_block(bitvec *rlc_block); -void gprs_rlcmac_rcv_block(bitvec *rlc_block); +int gprs_rlcmac_rcv_block(uint8_t *data, uint8_t len, uint32_t fn); -void gprs_rlcmac_rcv_rts_block(uint8_t trx, uint8_t ts, uint16_t arfcn, +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); @@ -111,5 +186,11 @@ 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 |