diff options
Diffstat (limited to 'src/host/virt_phy/include/osmocom/bb/virtphy/virt_l1_model.h')
| -rw-r--r-- | src/host/virt_phy/include/osmocom/bb/virtphy/virt_l1_model.h | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/src/host/virt_phy/include/osmocom/bb/virtphy/virt_l1_model.h b/src/host/virt_phy/include/osmocom/bb/virtphy/virt_l1_model.h new file mode 100644 index 00000000..94581f61 --- /dev/null +++ b/src/host/virt_phy/include/osmocom/bb/virtphy/virt_l1_model.h @@ -0,0 +1,119 @@ +#pragma once + +/* Per-MS specific state, closely attached to the L1CTL user progran */ + +#include <osmocom/gsm/gsm_utils.h> +#include <osmocom/core/timer.h> + +#include <osmocom/bb/virtphy/virtual_um.h> +#include <osmocom/bb/virtphy/l1ctl_sock.h> + +#define L1S_NUM_NEIGH_CELL 6 +#define A5_KEY_LEN 8 + +enum ms_state { + MS_STATE_IDLE_SEARCHING = 0, + MS_STATE_IDLE_SYNCING, + MS_STATE_IDLE_CAMPING, + MS_STATE_DEDICATED, +}; + + +/* structure representing L1 sync information about a cell */ +struct l1_cell_info { + /* on which ARFCN (+band) is the cell? */ + uint16_t arfcn; + /* what's the BSIC of the cell (from SCH burst decoding) */ + uint8_t bsic; + /* Combined or non-combined CCCH */ + uint8_t ccch_mode; /* enum ccch_mode */ + /* what's the delta of the cells current GSM frame number + * compared to our current local frame number */ + int32_t fn_offset; + /* how much does the TPU need adjustment (delta) to synchronize + * with the cells burst */ + uint32_t time_alignment; +}; + +struct crypto_info_ms { + /* key is expected in the same format as in RSL + * Encryption information IE. */ + uint8_t key[A5_KEY_LEN]; + uint8_t algo; +}; + +struct l1_state_ms { + + struct gsm_time downlink_time; /* current GSM time received on downlink */ + struct gsm_time current_time; /* GSM time used internally for scheduling */ + struct { + uint32_t last_exec_fn; + struct llist_head mframe_items; + } sched; + + enum ms_state state; + + /* the cell on which we are camping right now */ + struct l1_cell_info serving_cell; + /* neighbor cell sync info */ + struct l1_cell_info neigh_cell[L1S_NUM_NEIGH_CELL]; + struct crypto_info_ms crypto_inf; + + /* TCH info */ + uint8_t tch_mode; // see enum gsm48_chan_mode in gsm_04_08.h + uint8_t tch_sync; // needed for audio synchronization + uint8_t audio_mode; // see l1ctl_proto.h, e.g. AUDIO_TX_MICROPHONE + + /* dedicated channel info */ + struct { + uint8_t chan_type; // like rsl chantype 08.58 -> Chapter 9.3.1 */ + + uint16_t band_arfcn; + uint8_t tn; // timeslot number 1-7 + uint8_t subslot; // subslot of the dedicated channel, SDCCH/4:[0-3], SDCCH/8:[0-7] + + uint8_t scn; // single-hop cellular network? (unused in virtual um) + uint8_t tsc; // training sequence code (unused in virtual um) + uint8_t h; // hopping enabled flag (unused in virtual um) + } dedicated; + + /* fbsb state */ + struct { + uint32_t arfcn; + } fbsb; + + /* power management state */ + struct { + uint32_t timeout_us; + uint32_t timeout_s; + struct { + int16_t arfcn_sig_lev_dbm[1024]; + uint8_t arfcn_sig_lev_red_dbm[1024]; + struct osmo_timer_list arfcn_sig_lev_timers[1024]; + } meas; + struct { + uint16_t band_arfcn_from; + uint16_t band_arfcn_to; + /* timer between receiving PM_REQ and responding with PM_CONF */ + struct osmo_timer_list timer; + } req; + } pm; +}; + +struct l1_model_ms { + uint32_t nr; + /* pointer to the L1CTL socket client associated with this specific MS */ + struct l1ctl_sock_client *lsc; + /* pointer to the (shared) GSMTAP/VirtUM socket to talk to BTS(s) */ + struct virt_um_inst *vui; + /* GPRS state (MAC layer) */ + struct l1gprs_state *gprs; + /* actual per-MS state */ + struct l1_state_ms state; +}; + + +struct l1_model_ms *l1_model_ms_init(void *ctx, struct l1ctl_sock_client *lsc, struct virt_um_inst *vui); + +void l1_model_ms_destroy(struct l1_model_ms *model); + |