Pau Espin Pedrol | 02514bc | 2019-08-30 16:14:22 +0200 | [diff] [blame] | 1 | #include <osmocom/core/tdef.h> |
| 2 | |
| 3 | #include <osmocom/sgsn/gprs_mm_state_gb_fsm.h> |
Alexander Couzens | 6888021 | 2019-09-10 16:32:05 +0200 | [diff] [blame] | 4 | #include <osmocom/sgsn/gprs_llc.h> |
Pau Espin Pedrol | 02514bc | 2019-08-30 16:14:22 +0200 | [diff] [blame] | 5 | |
| 6 | #include <osmocom/sgsn/debug.h> |
| 7 | #include <osmocom/sgsn/sgsn.h> |
| 8 | |
| 9 | #define X(s) (1 << (s)) |
| 10 | |
| 11 | static const struct osmo_tdef_state_timeout mm_state_gb_fsm_timeouts[32] = { |
| 12 | [ST_MM_IDLE] = { }, |
| 13 | [ST_MM_READY] = { .T=3314 }, |
| 14 | [ST_MM_STANDBY] = { }, |
| 15 | }; |
| 16 | |
| 17 | #define mm_state_gb_fsm_state_chg(fi, NEXT_STATE) \ |
| 18 | osmo_tdef_fsm_inst_state_chg(fi, NEXT_STATE, mm_state_gb_fsm_timeouts, sgsn->cfg.T_defs, -1) |
| 19 | |
Alexander Couzens | 6888021 | 2019-09-10 16:32:05 +0200 | [diff] [blame] | 20 | static void st_mm_idle_on_enter(struct osmo_fsm_inst *fi, uint32_t prev_state) { |
| 21 | struct sgsn_mm_ctx *ctx = fi->priv; |
| 22 | |
Alexander Couzens | 4c7609a | 2019-09-11 03:00:47 +0200 | [diff] [blame^] | 23 | /* FIXME: remove this timer when RAU has it's own fsm */ |
| 24 | if (ctx->T == 3350 && osmo_timer_pending(&ctx->timer)) |
| 25 | osmo_timer_del(&ctx->timer); |
| 26 | |
Alexander Couzens | 6888021 | 2019-09-10 16:32:05 +0200 | [diff] [blame] | 27 | if (ctx->gb.llme) { |
| 28 | gprs_llgmm_unassign(ctx->gb.llme); |
| 29 | ctx->gb.llme = NULL; |
| 30 | } |
| 31 | } |
| 32 | |
Pau Espin Pedrol | 02514bc | 2019-08-30 16:14:22 +0200 | [diff] [blame] | 33 | static void st_mm_idle(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 34 | { |
| 35 | switch(event) { |
| 36 | case E_MM_GPRS_ATTACH: |
| 37 | mm_state_gb_fsm_state_chg(fi, ST_MM_READY); |
| 38 | break; |
| 39 | case E_MM_PDU_RECEPTION: |
| 40 | break; |
| 41 | } |
| 42 | } |
| 43 | |
| 44 | static void st_mm_ready(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 45 | { |
| 46 | unsigned long t_secs; |
| 47 | |
| 48 | switch(event) { |
| 49 | case E_MM_READY_TIMER_EXPIRY: |
| 50 | case E_MM_IMPLICIT_DETACH: |
| 51 | mm_state_gb_fsm_state_chg(fi, ST_MM_STANDBY); |
| 52 | break; |
| 53 | case E_MM_PDU_RECEPTION: |
| 54 | /* RE-arm the READY timer upon receival of Gb PDUs */ |
| 55 | t_secs = osmo_tdef_get(sgsn->cfg.T_defs, 3314, OSMO_TDEF_S, -1); |
| 56 | osmo_timer_schedule(&fi->timer, t_secs, 0); |
| 57 | break; |
| 58 | case E_MM_RA_UPDATE: |
| 59 | break; |
| 60 | } |
| 61 | } |
| 62 | |
| 63 | static void st_mm_standby(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 64 | { |
| 65 | switch(event) { |
| 66 | case E_MM_PDU_RECEPTION: |
| 67 | mm_state_gb_fsm_state_chg(fi, ST_MM_READY); |
| 68 | break; |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | static struct osmo_fsm_state mm_state_gb_fsm_states[] = { |
| 73 | [ST_MM_IDLE] = { |
| 74 | .in_event_mask = X(E_MM_GPRS_ATTACH) | X(E_MM_PDU_RECEPTION), |
| 75 | .out_state_mask = X(ST_MM_READY), |
Alexander Couzens | 6888021 | 2019-09-10 16:32:05 +0200 | [diff] [blame] | 76 | .onenter = st_mm_idle_on_enter, |
Pau Espin Pedrol | 02514bc | 2019-08-30 16:14:22 +0200 | [diff] [blame] | 77 | .name = "Idle", |
| 78 | .action = st_mm_idle, |
| 79 | }, |
| 80 | [ST_MM_READY] = { |
| 81 | .in_event_mask = X(E_MM_READY_TIMER_EXPIRY) | X(E_MM_RA_UPDATE) | X(E_MM_IMPLICIT_DETACH) | X(E_MM_PDU_RECEPTION), |
| 82 | .out_state_mask = X(ST_MM_IDLE) | X(ST_MM_STANDBY), |
| 83 | .name = "Ready", |
| 84 | .action = st_mm_ready, |
| 85 | }, |
| 86 | [ST_MM_STANDBY] = { |
| 87 | .in_event_mask = X(E_MM_PDU_RECEPTION), |
| 88 | .out_state_mask = X(ST_MM_IDLE) | X(ST_MM_READY), |
| 89 | .name = "Standby", |
| 90 | .action = st_mm_standby, |
| 91 | }, |
| 92 | }; |
| 93 | |
| 94 | const struct value_string mm_state_gb_fsm_event_names[] = { |
| 95 | OSMO_VALUE_STRING(E_MM_GPRS_ATTACH), |
| 96 | OSMO_VALUE_STRING(E_MM_PDU_RECEPTION), |
| 97 | OSMO_VALUE_STRING(E_MM_IMPLICIT_DETACH), |
| 98 | OSMO_VALUE_STRING(E_MM_READY_TIMER_EXPIRY), |
| 99 | OSMO_VALUE_STRING(E_MM_RA_UPDATE), |
| 100 | { 0, NULL } |
| 101 | }; |
| 102 | |
| 103 | int mm_state_gb_fsm_timer_cb(struct osmo_fsm_inst *fi) |
| 104 | { |
| 105 | switch(fi->state) { |
| 106 | case ST_MM_READY: |
| 107 | /* timer for mm state. state=READY: T3314 (aka TS 23.060 "READY timer") */ |
| 108 | osmo_fsm_inst_dispatch(fi, E_MM_READY_TIMER_EXPIRY, NULL); |
| 109 | break; |
| 110 | } |
| 111 | |
| 112 | return 0; |
| 113 | } |
| 114 | |
| 115 | struct osmo_fsm mm_state_gb_fsm = { |
| 116 | .name = "MM_STATE_Gb", |
| 117 | .states = mm_state_gb_fsm_states, |
| 118 | .num_states = ARRAY_SIZE(mm_state_gb_fsm_states), |
| 119 | .event_names = mm_state_gb_fsm_event_names, |
| 120 | .log_subsys = DMM, |
| 121 | .timer_cb = mm_state_gb_fsm_timer_cb, |
| 122 | }; |
| 123 | |
| 124 | static __attribute__((constructor)) void mm_state_gb_fsm_init(void) |
| 125 | { |
| 126 | osmo_fsm_register(&mm_state_gb_fsm); |
| 127 | } |