diff options
Diffstat (limited to 'src/osmo-bts-virtual/l1_if.c')
| -rw-r--r-- | src/osmo-bts-virtual/l1_if.c | 33 |
1 files changed, 23 insertions, 10 deletions
diff --git a/src/osmo-bts-virtual/l1_if.c b/src/osmo-bts-virtual/l1_if.c index cc9e6712..e663767e 100644 --- a/src/osmo-bts-virtual/l1_if.c +++ b/src/osmo-bts-virtual/l1_if.c @@ -27,6 +27,7 @@ #include <osmocom/core/bits.h> #include <osmocom/core/linuxlist.h> #include <osmocom/core/gsmtap.h> +#include <osmocom/gsm/protocol/gsm_08_58.h> #include <osmo-bts/logging.h> #include <osmo-bts/bts.h> @@ -48,25 +49,28 @@ */ static void virt_um_rcv_cb(struct virt_um_inst *vui, struct msgb *msg) { + struct gsmtap_hdr *gh; struct osmo_phsap_prim l1sap; - struct gsmtap_hdr *gh = (struct gsmtap_hdr *)msg->l1h; struct phy_link *plink = (struct phy_link *)vui->priv; // TODO: is there more than one physical instance? Where do i get the corresponding pinst number? Maybe gsmtap_hdr->antenna? struct phy_instance *pinst = phy_instance_by_num(plink, 0); memset(&l1sap, 0, sizeof(l1sap)); + msg->l1h = msgb_data(msg); + msg->l2h = msgb_pull(msg, sizeof(*gh)); + gh = msgb_l1(msg); switch (gh->sub_type) { case GSMTAP_CHANNEL_RACH: + // generate primitive for upper layer osmo_prim_init(&l1sap.oph, SAP_GSM_PH, PRIM_PH_RACH, PRIM_OP_INDICATION, - NULL); - l1sap.u.rach_ind.chan_nr = 0; // TODO: fill with proper value - l1sap.u.rach_ind.ra = 0; // TODO: fill with proper value - l1sap.u.rach_ind.fn = gh->frame_number; - // todo: schedule the uplink burst - //trx_sched_ul_burst(&l1h->l1s, tn, fn, bits, rssi, toa); + msg); + l1sap.u.rach_ind.chan_nr = RSL_CHAN_RACH; + // get the random access content + l1sap.u.rach_ind.ra = msgb_pull_u8(msg); + l1sap.u.rach_ind.fn = ntohl(gh->frame_number); break; case GSMTAP_CHANNEL_SDCCH: case GSMTAP_CHANNEL_SDCCH4: @@ -145,6 +149,8 @@ int bts_model_phy_link_open(struct phy_link *plink) plink->u.virt.ms_mcast_port, plink->u.virt.bts_mcast_group, plink->u.virt.bts_mcast_port, virt_um_rcv_cb); + // set back reference to plink + plink->u.virt.virt_um->priv = plink; if (!plink->u.virt.virt_um) { phy_link_state_set(plink, PHY_LINK_SHUTDOWN); return -1; @@ -155,10 +161,16 @@ int bts_model_phy_link_open(struct phy_link *plink) llist_for_each_entry(pinst, &plink->instances, list) { trx_sched_init(&pinst->u.virt.sched, pinst->trx); - /* TODO: why only start scheduler for CCCH */ - /* Only start the scheduler for the transceiver on c0. CCCH is on C0 */ - if (pinst->trx == pinst->trx->bts->c0) + /* Only start the scheduler for the transceiver on c0. If we have multiple tranceivers, CCCH is always on C0 and has to be auto active */ + /* Other trx are activated via oml by a PRIM_INFO_MODIFY / PRIM_INFO_ACTIVATE */ + if (pinst->trx == pinst->trx->bts->c0) { vbts_sched_start(pinst->trx->bts); + // init lapdm layer 3 callback for the trx on timeslot 0 == BCCH + lchan_init_lapdm(&pinst->trx->ts[0].lchan[CCCH_LCHAN]); + /* This is probably the wrong location to set the ccch to active... the oml link def. needs to be reworked and fixed. */ + pinst->trx->ts[0].lchan[CCCH_LCHAN].rel_act_kind = LCHAN_REL_ACT_OML; + lchan_set_state(&pinst->trx->ts[0].lchan[CCCH_LCHAN], LCHAN_S_ACTIVE); + } } /* this will automatically update the MO state of all associated @@ -312,6 +324,7 @@ int bts_model_l1sap_down(struct gsm_bts_trx *trx, struct osmo_phsap_prim *l1sap) tn = L1SAP_CHAN2TS(chan_nr); ss = l1sap_chan2ss(chan_nr); lchan = &trx->ts[tn].lchan[ss]; + // we receive a channel activation request from the bsc e.g. as a response to a channel req on rach if (l1sap->u.info.type == PRIM_INFO_ACTIVATE) { if ((chan_nr & 0x80)) { LOGP(DL1C, LOGL_ERROR, "Cannot activate" |